move watchdog tree from drivers/char/watchdog to drivers/watchdog.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
source "drivers/hwmon/Kconfig"
+source "drivers/watchdog/Kconfig"
+
source "drivers/ssb/Kconfig"
source "drivers/mfd/Kconfig"
obj-$(CONFIG_W1) += w1/
obj-$(CONFIG_POWER_SUPPLY) += power/
obj-$(CONFIG_HWMON) += hwmon/
-obj-$(CONFIG_WATCHDOG) += char/watchdog/
+obj-$(CONFIG_WATCHDOG) += watchdog/
obj-$(CONFIG_PHONE) += telephony/
obj-$(CONFIG_MD) += md/
obj-$(CONFIG_BT) += bluetooth/
source "drivers/char/ipmi/Kconfig"
-source "drivers/char/watchdog/Kconfig"
-
config DS1620
tristate "NetWinder thermometer support"
depends on ARCH_NETWINDER
+++ /dev/null
-#
-# Watchdog device configuration
-#
-
-menuconfig WATCHDOG
- bool "Watchdog Timer Support"
- ---help---
- If you say Y here (and to one of the following options) and create a
- character special file /dev/watchdog with major number 10 and minor
- number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
- subsequently opening the file and then failing to write to it for
- longer than 1 minute will result in rebooting the machine. This
- could be useful for a networked machine that needs to come back
- on-line as fast as possible after a lock-up. There's both a watchdog
- implementation entirely in software (which can sometimes fail to
- reboot the machine) and a driver for hardware watchdog boards, which
- are more robust and can also keep track of the temperature inside
- your computer. For details, read <file:Documentation/watchdog/watchdog.txt>
- in the kernel source.
-
- The watchdog is usually used together with the watchdog daemon
- which is available from
- <ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
- also monitor NFS connections and can reboot the machine when the process
- table is full.
-
- If unsure, say N.
-
-if WATCHDOG
-
-config WATCHDOG_NOWAYOUT
- bool "Disable watchdog shutdown on close"
- help
- The default watchdog behaviour (which you get if you say N here) is
- to stop the timer if the process managing it closes the file
- /dev/watchdog. It's always remotely possible that this process might
- get killed. If you say Y here, the watchdog cannot be stopped once
- it has been started.
-
-#
-# General Watchdog drivers
-#
-
-comment "Watchdog Device Drivers"
-
-# Architecture Independent
-
-config SOFT_WATCHDOG
- tristate "Software watchdog"
- help
- A software monitoring watchdog. This will fail to reboot your system
- from some situations that the hardware watchdog will recover
- from. Equally it's a lot cheaper to install.
-
- To compile this driver as a module, choose M here: the
- module will be called softdog.
-
-# ALPHA Architecture
-
-# ARM Architecture
-
-config AT91RM9200_WATCHDOG
- tristate "AT91RM9200 watchdog"
- depends on ARCH_AT91RM9200
- help
- Watchdog timer embedded into AT91RM9200 chips. This will reboot your
- system when the timeout is reached.
-
-config 21285_WATCHDOG
- tristate "DC21285 watchdog"
- depends on FOOTBRIDGE
- help
- The Intel Footbridge chip contains a built-in watchdog circuit. Say Y
- here if you wish to use this. Alternatively say M to compile the
- driver as a module, which will be called wdt285.
-
- This driver does not work on all machines. In particular, early CATS
- boards have hardware problems that will cause the machine to simply
- lock up if the watchdog fires.
-
- "If in doubt, leave it out" - say N.
-
-config 977_WATCHDOG
- tristate "NetWinder WB83C977 watchdog"
- depends on FOOTBRIDGE && ARCH_NETWINDER
- help
- Say Y here to include support for the WB977 watchdog included in
- NetWinder machines. Alternatively say M to compile the driver as
- a module, which will be called wdt977.
-
- Not sure? It's safe to say N.
-
-config IXP2000_WATCHDOG
- tristate "IXP2000 Watchdog"
- depends on ARCH_IXP2000
- help
- Say Y here if to include support for the watchdog timer
- in the Intel IXP2000(2400, 2800, 2850) network processors.
- This driver can be built as a module by choosing M. The module
- will be called ixp2000_wdt.
-
- Say N if you are unsure.
-
-config IXP4XX_WATCHDOG
- tristate "IXP4xx Watchdog"
- depends on ARCH_IXP4XX
- help
- Say Y here if to include support for the watchdog timer
- in the Intel IXP4xx network processors. This driver can
- be built as a module by choosing M. The module will
- be called ixp4xx_wdt.
-
- Note: The internal IXP4xx watchdog does a soft CPU reset
- which doesn't reset any peripherals. There are circumstances
- where the watchdog will fail to reset the board correctly
- (e.g., if the boot ROM is in an unreadable state).
-
- Say N if you are unsure.
-
-config KS8695_WATCHDOG
- tristate "KS8695 watchdog"
- depends on ARCH_KS8695
- help
- Watchdog timer embedded into KS8695 processor. This will reboot your
- system when the timeout is reached.
-
-config S3C2410_WATCHDOG
- tristate "S3C2410 Watchdog"
- depends on ARCH_S3C2410
- help
- Watchdog timer block in the Samsung S3C2410 chips. This will
- reboot the system when the timer expires with the watchdog
- enabled.
-
- The driver is limited by the speed of the system's PCLK
- signal, so with reasonably fast systems (PCLK around 50-66MHz)
- then watchdog intervals of over approximately 20seconds are
- unavailable.
-
- The driver can be built as a module by choosing M, and will
- be called s3c2410_wdt
-
-config SA1100_WATCHDOG
- tristate "SA1100/PXA2xx watchdog"
- depends on ARCH_SA1100 || ARCH_PXA
- help
- Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
- reboot your system when timeout is reached.
-
- NOTE: once enabled, this timer cannot be disabled.
-
- To compile this driver as a module, choose M here: the
- module will be called sa1100_wdt.
-
-config MPCORE_WATCHDOG
- tristate "MPcore watchdog"
- depends on ARM_MPCORE_PLATFORM && LOCAL_TIMERS
- help
- Watchdog timer embedded into the MPcore system.
-
- To compile this driver as a module, choose M here: the
- module will be called mpcore_wdt.
-
-config EP93XX_WATCHDOG
- tristate "EP93xx Watchdog"
- depends on ARCH_EP93XX
- help
- Say Y here if to include support for the watchdog timer
- embedded in the Cirrus Logic EP93xx family of devices.
-
- To compile this driver as a module, choose M here: the
- module will be called ep93xx_wdt.
-
-config OMAP_WATCHDOG
- tristate "OMAP Watchdog"
- depends on ARCH_OMAP16XX || ARCH_OMAP24XX
- help
- Support for TI OMAP1610/OMAP1710/OMAP2420 watchdog. Say 'Y' here to
- enable the OMAP1610/OMAP1710 watchdog timer.
-
-config PNX4008_WATCHDOG
- tristate "PNX4008 Watchdog"
- depends on ARCH_PNX4008
- help
- Say Y here if to include support for the watchdog timer
- in the PNX4008 processor.
- This driver can be built as a module by choosing M. The module
- will be called pnx4008_wdt.
-
- Say N if you are unsure.
-
-config IOP_WATCHDOG
- tristate "IOP Watchdog"
- depends on PLAT_IOP
- select WATCHDOG_NOWAYOUT if (ARCH_IOP32X || ARCH_IOP33X)
- help
- Say Y here if to include support for the watchdog timer
- in the Intel IOP3XX & IOP13XX I/O Processors. This driver can
- be built as a module by choosing M. The module will
- be called iop_wdt.
-
- Note: The IOP13XX watchdog does an Internal Bus Reset which will
- affect both cores and the peripherals of the IOP. The ATU-X
- and/or ATUe configuration registers will remain intact, but if
- operating as an Root Complex and/or Central Resource, the PCI-X
- and/or PCIe busses will also be reset. THIS IS A VERY BIG HAMMER.
-
-config DAVINCI_WATCHDOG
- tristate "DaVinci watchdog"
- depends on ARCH_DAVINCI
- help
- Say Y here if to include support for the watchdog timer
- in the DaVinci DM644x/DM646x processors.
- To compile this driver as a module, choose M here: the
- module will be called davinci_wdt.
-
- NOTE: once enabled, this timer cannot be disabled.
- Say N if you are unsure.
-
-# ARM26 Architecture
-
-# AVR32 Architecture
-
-config AT32AP700X_WDT
- tristate "AT32AP700x watchdog"
- depends on CPU_AT32AP7000
- help
- Watchdog timer embedded into AT32AP700x devices. This will reboot
- your system when the timeout is reached.
-
-# BLACKFIN Architecture
-
-config BFIN_WDT
- tristate "Blackfin On-Chip Watchdog Timer"
- depends on BLACKFIN
- ---help---
- If you say yes here you will get support for the Blackfin On-Chip
- Watchdog Timer. If you have one of these processors and wish to
- have watchdog support enabled, say Y, otherwise say N.
-
- To compile this driver as a module, choose M here: the
- module will be called bfin_wdt.
-
-# CRIS Architecture
-
-# FRV Architecture
-
-# H8300 Architecture
-
-# X86 (i386 + ia64 + x86_64) Architecture
-
-config ACQUIRE_WDT
- tristate "Acquire SBC Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on Single Board
- Computers produced by Acquire Inc (and others). This watchdog
- simply watches your kernel to make sure it doesn't freeze, and if
- it does, it reboots your computer after a certain amount of time.
-
- To compile this driver as a module, choose M here: the
- module will be called acquirewdt.
-
- Most people will say N.
-
-config ADVANTECH_WDT
- tristate "Advantech SBC Watchdog Timer"
- depends on X86
- help
- If you are configuring a Linux kernel for the Advantech single-board
- computer, say `Y' here to support its built-in watchdog timer
- feature. More information can be found at
- <http://www.advantech.com.tw/products/>
-
-config ALIM1535_WDT
- tristate "ALi M1535 PMU Watchdog Timer"
- depends on X86 && PCI
- ---help---
- This is the driver for the hardware watchdog on the ALi M1535 PMU.
-
- To compile this driver as a module, choose M here: the
- module will be called alim1535_wdt.
-
- Most people will say N.
-
-config ALIM7101_WDT
- tristate "ALi M7101 PMU Computer Watchdog"
- depends on X86 && PCI
- help
- This is the driver for the hardware watchdog on the ALi M7101 PMU
- as used in the x86 Cobalt servers.
-
- To compile this driver as a module, choose M here: the
- module will be called alim7101_wdt.
-
- Most people will say N.
-
-config SC520_WDT
- tristate "AMD Elan SC520 processor Watchdog"
- depends on X86
- help
- This is the driver for the hardware watchdog built in to the
- AMD "Elan" SC520 microcomputer commonly used in embedded systems.
- This watchdog simply watches your kernel to make sure it doesn't
- freeze, and if it does, it reboots your computer after a certain
- amount of time.
-
- You can compile this driver directly into the kernel, or use
- it as a module. The module will be called sc520_wdt.
-
-config EUROTECH_WDT
- tristate "Eurotech CPU-1220/1410 Watchdog Timer"
- depends on X86
- help
- Enable support for the watchdog timer on the Eurotech CPU-1220 and
- CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
- information are at <http://www.eurotech.it/>.
-
-config IB700_WDT
- tristate "IB700 SBC Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the IB700 Single
- Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
- simply watches your kernel to make sure it doesn't freeze, and if
- it does, it reboots your computer after a certain amount of time.
-
- This driver is like the WDT501 driver but for slightly different hardware.
-
- To compile this driver as a module, choose M here: the
- module will be called ib700wdt.
-
- Most people will say N.
-
-config IBMASR
- tristate "IBM Automatic Server Restart"
- depends on X86
- help
- This is the driver for the IBM Automatic Server Restart watchdog
- timer built-in into some eServer xSeries machines.
-
- To compile this driver as a module, choose M here: the
- module will be called ibmasr.
-
-config WAFER_WDT
- tristate "ICP Wafer 5823 Single Board Computer Watchdog"
- depends on X86
- help
- This is a driver for the hardware watchdog on the ICP Wafer 5823
- Single Board Computer (and probably other similar models).
-
- To compile this driver as a module, choose M here: the
- module will be called wafer5823wdt.
-
-config I6300ESB_WDT
- tristate "Intel 6300ESB Timer/Watchdog"
- depends on X86 && PCI
- ---help---
- Hardware driver for the watchdog timer built into the Intel
- 6300ESB controller hub.
-
- To compile this driver as a module, choose M here: the
- module will be called i6300esb.
-
-config ITCO_WDT
- tristate "Intel TCO Timer/Watchdog"
- depends on (X86 || IA64) && PCI
- ---help---
- Hardware driver for the intel TCO timer based watchdog devices.
- These drivers are included in the Intel 82801 I/O Controller
- Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
- controller hub.
-
- The TCO (Total Cost of Ownership) timer is a watchdog timer
- that will reboot the machine after its second expiration. The
- expiration time can be configured with the "heartbeat" parameter.
-
- On some motherboards the driver may fail to reset the chipset's
- NO_REBOOT flag which prevents the watchdog from rebooting the
- machine. If this is the case you will get a kernel message like
- "failed to reset NO_REBOOT flag, reboot disabled by hardware".
-
- To compile this driver as a module, choose M here: the
- module will be called iTCO_wdt.
-
-config ITCO_VENDOR_SUPPORT
- bool "Intel TCO Timer/Watchdog Specific Vendor Support"
- depends on ITCO_WDT
- ---help---
- Add vendor specific support to the intel TCO timer based watchdog
- devices. At this moment we only have additional support for some
- SuperMicro Inc. motherboards.
-
-config SC1200_WDT
- tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
- depends on X86
- help
- This is a driver for National Semiconductor PC87307/PC97307 hardware
- watchdog cards as found on the SC1200. This watchdog is mainly used
- for power management purposes and can be used to power down the device
- during inactivity periods (includes interrupt activity monitoring).
-
- To compile this driver as a module, choose M here: the
- module will be called sc1200wdt.
-
- Most people will say N.
-
-config SCx200_WDT
- tristate "National Semiconductor SCx200 Watchdog"
- depends on SCx200 && PCI
- help
- Enable the built-in watchdog timer support on the National
- Semiconductor SCx200 processors.
-
- If compiled as a module, it will be called scx200_wdt.
-
-config PC87413_WDT
- tristate "NS PC87413 watchdog"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the PC87413 chipset
- This watchdog simply watches your kernel to make sure it doesn't
- freeze, and if it does, it reboots your computer after a certain
- amount of time.
-
- To compile this driver as a module, choose M here: the
- module will be called pc87413_wdt.
-
- Most people will say N.
-
-config 60XX_WDT
- tristate "SBC-60XX Watchdog Timer"
- depends on X86
- help
- This driver can be used with the watchdog timer found on some
- single board computers, namely the 6010 PII based computer.
- It may well work with other cards. It reads port 0x443 to enable
- and re-set the watchdog timer, and reads port 0x45 to disable
- the watchdog. If you have a card that behave in similar ways,
- you can probably make this driver work with your card as well.
-
- You can compile this driver directly into the kernel, or use
- it as a module. The module will be called sbc60xxwdt.
-
-config SBC8360_WDT
- tristate "SBC8360 Watchdog Timer"
- depends on X86
- ---help---
-
- This is the driver for the hardware watchdog on the SBC8360 Single
- Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
-
- To compile this driver as a module, choose M here: the
- module will be called sbc8360.ko.
-
- Most people will say N.
-
-config CPU5_WDT
- tristate "SMA CPU5 Watchdog"
- depends on X86
- ---help---
- TBD.
- To compile this driver as a module, choose M here: the
- module will be called cpu5wdt.
-
-config SMSC37B787_WDT
- tristate "Winbond SMsC37B787 Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog component on the
- Winbond SMsC37B787 chipset as used on the NetRunner Mainboard
- from Vision Systems and maybe others.
-
- This watchdog simply watches your kernel to make sure it doesn't
- freeze, and if it does, it reboots your computer after a certain
- amount of time.
-
- Usually a userspace daemon will notify the kernel WDT driver that
- userspace is still alive, at regular intervals.
-
- To compile this driver as a module, choose M here: the
- module will be called smsc37b787_wdt.
-
- Most people will say N.
-
-config W83627HF_WDT
- tristate "W83627HF Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the W83627HF chipset
- as used in Advantech PC-9578 and Tyan S2721-533 motherboards
- (and likely others). This watchdog simply watches your kernel to
- make sure it doesn't freeze, and if it does, it reboots your computer
- after a certain amount of time.
-
- To compile this driver as a module, choose M here: the
- module will be called w83627hf_wdt.
-
- Most people will say N.
-
-config W83697HF_WDT
- tristate "W83697HF/W83697HG Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the W83697HF/HG
- chipset as used in Dedibox/VIA motherboards (and likely others).
- This watchdog simply watches your kernel to make sure it doesn't
- freeze, and if it does, it reboots your computer after a certain
- amount of time.
-
- To compile this driver as a module, choose M here: the
- module will be called w83697hf_wdt.
-
- Most people will say N.
-
-config W83877F_WDT
- tristate "W83877F (EMACS) Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the W83877F chipset
- as used in EMACS PC-104 motherboards (and likely others). This
- watchdog simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time.
-
- To compile this driver as a module, choose M here: the
- module will be called w83877f_wdt.
-
- Most people will say N.
-
-config W83977F_WDT
- tristate "W83977F (PCM-5335) Watchdog Timer"
- depends on X86
- ---help---
- This is the driver for the hardware watchdog on the W83977F I/O chip
- as used in AAEON's PCM-5335 SBC (and likely others). This
- watchdog simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time.
-
- To compile this driver as a module, choose M here: the
- module will be called w83977f_wdt.
-
-config MACHZ_WDT
- tristate "ZF MachZ Watchdog"
- depends on X86
- ---help---
- If you are using a ZF Micro MachZ processor, say Y here, otherwise
- N. This is the driver for the watchdog timer built-in on that
- processor using ZF-Logic interface. This watchdog simply watches
- your kernel to make sure it doesn't freeze, and if it does, it
- reboots your computer after a certain amount of time.
-
- To compile this driver as a module, choose M here: the
- module will be called machzwd.
-
-config SBC_EPX_C3_WATCHDOG
- tristate "Winsystems SBC EPX-C3 watchdog"
- depends on X86
- ---help---
- This is the driver for the built-in watchdog timer on the EPX-C3
- Single-board computer made by Winsystems, Inc.
-
- *Note*: This hardware watchdog is not probeable and thus there
- is no way to know if writing to its IO address will corrupt
- your system or have any real effect. The only way to be sure
- that this driver does what you want is to make sure you
- are running it on an EPX-C3 from Winsystems with the watchdog
- timer at IO address 0x1ee and 0x1ef. It will write to both those
- IO ports. Basically, the assumption is made that if you compile
- this driver into your kernel and/or load it as a module, that you
- know what you are doing and that you are in fact running on an
- EPX-C3 board!
-
- To compile this driver as a module, choose M here: the
- module will be called sbc_epx_c3.
-
-# M32R Architecture
-
-# M68K Architecture
-
-# M68KNOMMU Architecture
-
-# MIPS Architecture
-
-config INDYDOG
- tristate "Indy/I2 Hardware Watchdog"
- depends on SGI_IP22
- help
- Hardware driver for the Indy's/I2's watchdog. This is a
- watchdog timer that will reboot the machine after a 60 second
- timer expired and no process has written to /dev/watchdog during
- that time.
-
-config WDT_MTX1
- tristate "MTX-1 Hardware Watchdog"
- depends on MIPS_MTX1
- help
- Hardware driver for the MTX-1 boards. This is a watchdog timer that
- will reboot the machine after a 100 seconds timer expired.
-
-config WDT_RM9K_GPI
- tristate "RM9000/GPI hardware watchdog"
- depends on CPU_RM9000
- help
- Watchdog implementation using the GPI hardware found on
- PMC-Sierra RM9xxx CPUs.
-
- To compile this driver as a module, choose M here: the
- module will be called rm9k_wdt.
-
-# PARISC Architecture
-
-# POWERPC Architecture
-
-config MPC5200_WDT
- tristate "MPC5200 Watchdog Timer"
- depends on PPC_MPC52xx
-
-config 8xx_WDT
- tristate "MPC8xx Watchdog Timer"
- depends on 8xx
-
-config 83xx_WDT
- tristate "MPC83xx Watchdog Timer"
- depends on PPC_83xx
-
-config MV64X60_WDT
- tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
- depends on MV64X60
-
-config BOOKE_WDT
- bool "PowerPC Book-E Watchdog Timer"
- depends on BOOKE || 4xx
- ---help---
- Please see Documentation/watchdog/watchdog-api.txt for
- more information.
-
-# PPC64 Architecture
-
-config WATCHDOG_RTAS
- tristate "RTAS watchdog"
- depends on PPC_RTAS
- help
- This driver adds watchdog support for the RTAS watchdog.
-
- To compile this driver as a module, choose M here. The module
- will be called wdrtas.
-
-# S390 Architecture
-
-config ZVM_WATCHDOG
- tristate "z/VM Watchdog Timer"
- depends on S390
- help
- IBM s/390 and zSeries machines running under z/VM 5.1 or later
- provide a virtual watchdog timer to their guest that cause a
- user define Control Program command to be executed after a
- timeout.
-
- To compile this driver as a module, choose M here. The module
- will be called vmwatchdog.
-
-# SUPERH (sh + sh64) Architecture
-
-config SH_WDT
- tristate "SuperH Watchdog"
- depends on SUPERH && (CPU_SH3 || CPU_SH4)
- help
- This driver adds watchdog support for the integrated watchdog in the
- SuperH processors. If you have one of these processors and wish
- to have watchdog support enabled, say Y, otherwise say N.
-
- As a side note, saying Y here will automatically boost HZ to 1000
- so that the timer has a chance to clear the overflow counter. On
- slower systems (such as the SH-2 and SH-3) this will likely yield
- some performance issues. As such, the WDT should be avoided here
- unless it is absolutely necessary.
-
- To compile this driver as a module, choose M here: the
- module will be called shwdt.
-
-config SH_WDT_MMAP
- bool "Allow mmap of SH WDT"
- default n
- depends on SH_WDT
- help
- If you say Y here, user applications will be able to mmap the
- WDT/CPG registers.
-
-# SPARC Architecture
-
-# SPARC64 Architecture
-
-config WATCHDOG_CP1XXX
- tristate "CP1XXX Hardware Watchdog support"
- depends on SPARC64 && PCI
- ---help---
- This is the driver for the hardware watchdog timers present on
- Sun Microsystems CompactPCI models CP1400 and CP1500.
-
- To compile this driver as a module, choose M here: the
- module will be called cpwatchdog.
-
- If you do not have a CompactPCI model CP1400 or CP1500, or
- another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
- you should say N to this option.
-
-config WATCHDOG_RIO
- tristate "RIO Hardware Watchdog support"
- depends on SPARC64 && PCI
- help
- Say Y here to support the hardware watchdog capability on Sun RIO
- machines. The watchdog timeout period is normally one minute but
- can be changed with a boot-time parameter.
-
-# V850 Architecture
-
-# XTENSA Architecture
-
-#
-# ISA-based Watchdog Cards
-#
-
-comment "ISA-based Watchdog Cards"
- depends on ISA
-
-config PCWATCHDOG
- tristate "Berkshire Products ISA-PC Watchdog"
- depends on ISA
- ---help---
- This is the driver for the Berkshire Products ISA-PC Watchdog card.
- This card simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time. This driver is like the WDT501 driver but for different
- hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
- watchdog cards can be ordered from <http://www.berkprod.com/>.
-
- To compile this driver as a module, choose M here: the
- module will be called pcwd.
-
- Most people will say N.
-
-config MIXCOMWD
- tristate "Mixcom Watchdog"
- depends on ISA
- ---help---
- This is a driver for the Mixcom hardware watchdog cards. This
- watchdog simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time.
-
- To compile this driver as a module, choose M here: the
- module will be called mixcomwd.
-
- Most people will say N.
-
-config WDT
- tristate "WDT Watchdog timer"
- depends on ISA
- ---help---
- If you have a WDT500P or WDT501P watchdog board, say Y here,
- otherwise N. It is not possible to probe for this board, which means
- that you have to inform the kernel about the IO port and IRQ that
- is needed (you can do this via the io and irq parameters)
-
- To compile this driver as a module, choose M here: the
- module will be called wdt.
-
-config WDT_501
- bool "WDT501 features"
- depends on WDT
- help
- Saying Y here and creating a character special file /dev/temperature
- with major number 10 and minor number 131 ("man mknod") will give
- you a thermometer inside your computer: reading from
- /dev/temperature yields one byte, the temperature in degrees
- Fahrenheit. This works only if you have a WDT501P watchdog board
- installed.
-
- If you want to enable the Fan Tachometer on the WDT501P, then you
- can do this via the tachometer parameter. Only do this if you have a
- fan tachometer actually set up.
-
-#
-# PCI-based Watchdog Cards
-#
-
-comment "PCI-based Watchdog Cards"
- depends on PCI
-
-config PCIPCWATCHDOG
- tristate "Berkshire Products PCI-PC Watchdog"
- depends on PCI
- ---help---
- This is the driver for the Berkshire Products PCI-PC Watchdog card.
- This card simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time. The card can also monitor the internal temperature of the PC.
- More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
-
- To compile this driver as a module, choose M here: the
- module will be called pcwd_pci.
-
- Most people will say N.
-
-config WDTPCI
- tristate "PCI-WDT500/501 Watchdog timer"
- depends on PCI
- ---help---
- If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
-
- To compile this driver as a module, choose M here: the
- module will be called wdt_pci.
-
-config WDT_501_PCI
- bool "PCI-WDT501 features"
- depends on WDTPCI
- help
- Saying Y here and creating a character special file /dev/temperature
- with major number 10 and minor number 131 ("man mknod") will give
- you a thermometer inside your computer: reading from
- /dev/temperature yields one byte, the temperature in degrees
- Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
- installed.
-
- If you want to enable the Fan Tachometer on the PCI-WDT501, then you
- can do this via the tachometer parameter. Only do this if you have a
- fan tachometer actually set up.
-
-#
-# USB-based Watchdog Cards
-#
-
-comment "USB-based Watchdog Cards"
- depends on USB
-
-config USBPCWATCHDOG
- tristate "Berkshire Products USB-PC Watchdog"
- depends on USB
- ---help---
- This is the driver for the Berkshire Products USB-PC Watchdog card.
- This card simply watches your kernel to make sure it doesn't freeze,
- and if it does, it reboots your computer after a certain amount of
- time. The card can also monitor the internal temperature of the PC.
- More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
-
- To compile this driver as a module, choose M here: the
- module will be called pcwd_usb.
-
- Most people will say N.
-
-endif # WATCHDOG
+++ /dev/null
-#
-# Makefile for the WatchDog device drivers.
-#
-
-# Only one watchdog can succeed. We probe the ISA/PCI/USB based
-# watchdog-cards first, then the architecture specific watchdog
-# drivers and then the architecture independant "softdog" driver.
-# This means that if your ISA/PCI/USB card isn't detected that
-# you can fall back to an architecture specific driver and if
-# that also fails then you can fall back to the software watchdog
-# to give you some cover.
-
-# ISA-based Watchdog Cards
-obj-$(CONFIG_PCWATCHDOG) += pcwd.o
-obj-$(CONFIG_MIXCOMWD) += mixcomwd.o
-obj-$(CONFIG_WDT) += wdt.o
-
-# PCI-based Watchdog Cards
-obj-$(CONFIG_PCIPCWATCHDOG) += pcwd_pci.o
-obj-$(CONFIG_WDTPCI) += wdt_pci.o
-
-# USB-based Watchdog Cards
-obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
-
-# ALPHA Architecture
-
-# ARM Architecture
-obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
-obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
-obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
-obj-$(CONFIG_977_WATCHDOG) += wdt977.o
-obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
-obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
-obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
-obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
-obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
-obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
-obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
-obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
-obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
-obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
-
-# ARM26 Architecture
-
-# AVR32 Architecture
-obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
-
-# BLACKFIN Architecture
-obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
-
-# CRIS Architecture
-
-# FRV Architecture
-
-# H8300 Architecture
-
-# X86 (i386 + ia64 + x86_64) Architecture
-obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
-obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
-obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o
-obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
-obj-$(CONFIG_SC520_WDT) += sc520_wdt.o
-obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
-obj-$(CONFIG_IB700_WDT) += ib700wdt.o
-obj-$(CONFIG_IBMASR) += ibmasr.o
-obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
-obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
-obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o iTCO_vendor_support.o
-obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
-obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
-obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
-obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
-obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
-obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
-obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
-obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
-obj-$(CONFIG_W83697HF_WDT) += w83697hf_wdt.o
-obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
-obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
-obj-$(CONFIG_MACHZ_WDT) += machzwd.o
-obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
-
-# M32R Architecture
-
-# M68K Architecture
-
-# M68KNOMMU Architecture
-
-# MIPS Architecture
-obj-$(CONFIG_INDYDOG) += indydog.o
-obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
-obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
-
-# PARISC Architecture
-
-# POWERPC Architecture
-obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
-obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
-obj-$(CONFIG_83xx_WDT) += mpc83xx_wdt.o
-obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
-obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
-
-# PPC64 Architecture
-obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o
-
-# S390 Architecture
-
-# SUPERH (sh + sh64) Architecture
-obj-$(CONFIG_SH_WDT) += shwdt.o
-
-# SPARC Architecture
-
-# SPARC64 Architecture
-
-# V850 Architecture
-
-# XTENSA Architecture
-
-# Architecture Independant
-obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
+++ /dev/null
-/*
- * Acquire Single Board Computer Watchdog Timer driver
- *
- * Based on wdt.c. Original copyright messages:
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@redhat.com>
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- * Can't add timeout - driver doesn't allow changing value
- */
-
-/*
- * Theory of Operation:
- * The Watch-Dog Timer is provided to ensure that standalone
- * Systems can always recover from catastrophic conditions that
- * caused the CPU to crash. This condition may have occured by
- * external EMI or a software bug. When the CPU stops working
- * correctly, hardware on the board will either perform a hardware
- * reset (cold boot) or a non-maskable interrupt (NMI) to bring the
- * system back to a known state.
- *
- * The Watch-Dog Timer is controlled by two I/O Ports.
- * 443 hex - Read - Enable or refresh the Watch-Dog Timer
- * 043 hex - Read - Disable the Watch-Dog Timer
- *
- * To enable the Watch-Dog Timer, a read from I/O port 443h must
- * be performed. This will enable and activate the countdown timer
- * which will eventually time out and either reset the CPU or cause
- * an NMI depending on the setting of a jumper. To ensure that this
- * reset condition does not occur, the Watch-Dog Timer must be
- * periodically refreshed by reading the same I/O port 443h.
- * The Watch-Dog Timer is disabled by reading I/O port 043h.
- *
- * The Watch-Dog Timer Time-Out Period is set via jumpers.
- * It can be 1, 2, 10, 20, 110 or 220 seconds.
- */
-
-/*
- * Includes, defines, variables, module parameters, ...
- */
-
-/* Includes */
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
-#include <linux/watchdog.h> /* For the watchdog specific items */
-#include <linux/fs.h> /* For file operations */
-#include <linux/ioport.h> /* For io-port access */
-#include <linux/platform_device.h> /* For platform_driver framework */
-#include <linux/init.h> /* For __init/__exit/... */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
-
-/* Module information */
-#define DRV_NAME "acquirewdt"
-#define PFX DRV_NAME ": "
-#define WATCHDOG_NAME "Acquire WDT"
-#define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */
-
-/* internal variables */
-static struct platform_device *acq_platform_device; /* the watchdog platform device */
-static unsigned long acq_is_open;
-static char expect_close;
-
-/* module parameters */
-static int wdt_stop = 0x43; /* You must set this - there is no sane way to probe for this board. */
-module_param(wdt_stop, int, 0);
-MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)");
-
-static int wdt_start = 0x443; /* You must set this - there is no sane way to probe for this board. */
-module_param(wdt_start, int, 0);
-MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Watchdog Operations
- */
-
-static void acq_keepalive(void)
-{
- /* Write a watchdog value */
- inb_p(wdt_start);
-}
-
-static void acq_stop(void)
-{
- /* Turn the card off */
- inb_p(wdt_stop);
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
-
- /* Well, anyhow someone wrote to us, we should return that favour */
- acq_keepalive();
- }
- return count;
-}
-
-static int acq_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int options, retval = -EINVAL;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident =
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = WATCHDOG_NAME,
- };
-
- switch(cmd)
- {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- acq_keepalive();
- return 0;
-
- case WDIOC_GETTIMEOUT:
- return put_user(WATCHDOG_HEARTBEAT, p);
-
- case WDIOC_SETOPTIONS:
- {
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD)
- {
- acq_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD)
- {
- acq_keepalive();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
-}
-
-static int acq_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &acq_is_open))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate */
- acq_keepalive();
- return nonseekable_open(inode, file);
-}
-
-static int acq_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- acq_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- acq_keepalive();
- }
- clear_bit(0, &acq_is_open);
- expect_close = 0;
- return 0;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations acq_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = acq_write,
- .ioctl = acq_ioctl,
- .open = acq_open,
- .release = acq_close,
-};
-
-static struct miscdevice acq_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &acq_fops,
-};
-
-/*
- * Init & exit routines
- */
-
-static int __devinit acq_probe(struct platform_device *dev)
-{
- int ret;
-
- if (wdt_stop != wdt_start) {
- if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
- ret = -EIO;
- goto out;
- }
- }
-
- if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
- ret = -EIO;
- goto unreg_stop;
- }
-
- ret = misc_register(&acq_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto unreg_regions;
- }
-
- printk (KERN_INFO PFX "initialized. (nowayout=%d)\n",
- nowayout);
-
- return 0;
-
-unreg_regions:
- release_region(wdt_start, 1);
-unreg_stop:
- if (wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
-out:
- return ret;
-}
-
-static int __devexit acq_remove(struct platform_device *dev)
-{
- misc_deregister(&acq_miscdev);
- release_region(wdt_start,1);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop,1);
-
- return 0;
-}
-
-static void acq_shutdown(struct platform_device *dev)
-{
- /* Turn the WDT off if we have a soft shutdown */
- acq_stop();
-}
-
-static struct platform_driver acquirewdt_driver = {
- .probe = acq_probe,
- .remove = __devexit_p(acq_remove),
- .shutdown = acq_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = DRV_NAME,
- },
-};
-
-static int __init acq_init(void)
-{
- int err;
-
- printk(KERN_INFO "WDT driver for Acquire single board computer initialising.\n");
-
- err = platform_driver_register(&acquirewdt_driver);
- if (err)
- return err;
-
- acq_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
- if (IS_ERR(acq_platform_device)) {
- err = PTR_ERR(acq_platform_device);
- goto unreg_platform_driver;
- }
-
- return 0;
-
-unreg_platform_driver:
- platform_driver_unregister(&acquirewdt_driver);
- return err;
-}
-
-static void __exit acq_exit(void)
-{
- platform_device_unregister(acq_platform_device);
- platform_driver_unregister(&acquirewdt_driver);
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(acq_init);
-module_exit(acq_exit);
-
-MODULE_AUTHOR("David Woodhouse");
-MODULE_DESCRIPTION("Acquire Inc. Single Board Computer Watchdog Timer driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Advantech Single Board Computer WDT driver
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * Based on acquirewdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@redhat.com>
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- *
- * 16-Oct-2002 Rob Radez <rob@osinvestor.com>
- * Clean up ioctls, clean up init + exit, add expect close support,
- * add wdt_start and wdt_stop as parameters.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define DRV_NAME "advantechwdt"
-#define PFX DRV_NAME ": "
-#define WATCHDOG_NAME "Advantech WDT"
-#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
-
-static struct platform_device *advwdt_platform_device; /* the watchdog platform device */
-static unsigned long advwdt_is_open;
-static char adv_expect_close;
-
-/*
- * You must set these - there is no sane way to probe for this board.
- *
- * To enable or restart, write the timeout value in seconds (1 to 63)
- * to I/O port wdt_start. To disable, read I/O port wdt_stop.
- * Both are 0x443 for most boards (tested on a PCA-6276VE-00B1), but
- * check your manual (at least the PCA-6159 seems to be different -
- * the manual says wdt_stop is 0x43, not 0x443).
- * (0x43 is also a write-only control register for the 8254 timer!)
- */
-
-static int wdt_stop = 0x443;
-module_param(wdt_stop, int, 0);
-MODULE_PARM_DESC(wdt_stop, "Advantech WDT 'stop' io port (default 0x443)");
-
-static int wdt_start = 0x443;
-module_param(wdt_start, int, 0);
-MODULE_PARM_DESC(wdt_start, "Advantech WDT 'start' io port (default 0x443)");
-
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Watchdog Operations
- */
-
-static void
-advwdt_ping(void)
-{
- /* Write a watchdog value */
- outb_p(timeout, wdt_start);
-}
-
-static void
-advwdt_disable(void)
-{
- inb_p(wdt_stop);
-}
-
-static int
-advwdt_set_heartbeat(int t)
-{
- if ((t < 1) || (t > 63))
- return -EINVAL;
-
- timeout = t;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t
-advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- adv_expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf+i))
- return -EFAULT;
- if (c == 'V')
- adv_expect_close = 42;
- }
- }
- advwdt_ping();
- }
- return count;
-}
-
-static int
-advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int new_timeout;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = WATCHDOG_NAME,
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- advwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (advwdt_set_heartbeat(new_timeout))
- return -EINVAL;
- advwdt_ping();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- advwdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- advwdt_ping();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int
-advwdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &advwdt_is_open))
- return -EBUSY;
- /*
- * Activate
- */
-
- advwdt_ping();
- return nonseekable_open(inode, file);
-}
-
-static int
-advwdt_close(struct inode *inode, struct file *file)
-{
- if (adv_expect_close == 42) {
- advwdt_disable();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- advwdt_ping();
- }
- clear_bit(0, &advwdt_is_open);
- adv_expect_close = 0;
- return 0;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations advwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = advwdt_write,
- .ioctl = advwdt_ioctl,
- .open = advwdt_open,
- .release = advwdt_close,
-};
-
-static struct miscdevice advwdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &advwdt_fops,
-};
-
-/*
- * Init & exit routines
- */
-
-static int __devinit
-advwdt_probe(struct platform_device *dev)
-{
- int ret;
-
- if (wdt_stop != wdt_start) {
- if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
- ret = -EIO;
- goto out;
- }
- }
-
- if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
- ret = -EIO;
- goto unreg_stop;
- }
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (advwdt_set_heartbeat(timeout)) {
- advwdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n",
- timeout);
- }
-
- ret = misc_register(&advwdt_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto unreg_regions;
- }
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
-out:
- return ret;
-unreg_regions:
- release_region(wdt_start, 1);
-unreg_stop:
- if (wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
- goto out;
-}
-
-static int __devexit
-advwdt_remove(struct platform_device *dev)
-{
- misc_deregister(&advwdt_miscdev);
- release_region(wdt_start,1);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop,1);
-
- return 0;
-}
-
-static void
-advwdt_shutdown(struct platform_device *dev)
-{
- /* Turn the WDT off if we have a soft shutdown */
- advwdt_disable();
-}
-
-static struct platform_driver advwdt_driver = {
- .probe = advwdt_probe,
- .remove = __devexit_p(advwdt_remove),
- .shutdown = advwdt_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = DRV_NAME,
- },
-};
-
-static int __init
-advwdt_init(void)
-{
- int err;
-
- printk(KERN_INFO "WDT driver for Advantech single board computer initialising.\n");
-
- err = platform_driver_register(&advwdt_driver);
- if (err)
- return err;
-
- advwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
- if (IS_ERR(advwdt_platform_device)) {
- err = PTR_ERR(advwdt_platform_device);
- goto unreg_platform_driver;
- }
-
- return 0;
-
-unreg_platform_driver:
- platform_driver_unregister(&advwdt_driver);
- return err;
-}
-
-static void __exit
-advwdt_exit(void)
-{
- platform_device_unregister(advwdt_platform_device);
- platform_driver_unregister(&advwdt_driver);
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(advwdt_init);
-module_exit(advwdt_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Marek Michalkiewicz <marekm@linux.org.pl>");
-MODULE_DESCRIPTION("Advantech Single Board Computer WDT driver");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog for the 7101 PMU version found in the ALi M1535 chipsets
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/pci.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define WATCHDOG_NAME "ALi_M1535"
-#define PFX WATCHDOG_NAME ": "
-#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
-
-/* internal variables */
-static unsigned long ali_is_open;
-static char ali_expect_release;
-static struct pci_dev *ali_pci;
-static u32 ali_timeout_bits; /* stores the computed timeout */
-static spinlock_t ali_lock; /* Guards the hardware */
-
-/* module parameters */
-static int timeout = WATCHDOG_TIMEOUT;
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (0<timeout<18000, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * ali_start - start watchdog countdown
- *
- * Starts the timer running providing the timer has a counter
- * configuration set.
- */
-
-static void ali_start(void)
-{
- u32 val;
-
- spin_lock(&ali_lock);
-
- pci_read_config_dword(ali_pci, 0xCC, &val);
- val &= ~0x3F; /* Mask count */
- val |= (1<<25) | ali_timeout_bits;
- pci_write_config_dword(ali_pci, 0xCC, val);
-
- spin_unlock(&ali_lock);
-}
-
-/*
- * ali_stop - stop the timer countdown
- *
- * Stop the ALi watchdog countdown
- */
-
-static void ali_stop(void)
-{
- u32 val;
-
- spin_lock(&ali_lock);
-
- pci_read_config_dword(ali_pci, 0xCC, &val);
- val &= ~0x3F; /* Mask count to zero (disabled) */
- val &= ~(1<<25);/* and for safety mask the reset enable */
- pci_write_config_dword(ali_pci, 0xCC, val);
-
- spin_unlock(&ali_lock);
-}
-
-/*
- * ali_keepalive - send a keepalive to the watchdog
- *
- * Send a keepalive to the timer (actually we restart the timer).
- */
-
-static void ali_keepalive(void)
-{
- ali_start();
-}
-
-/*
- * ali_settimer - compute the timer reload value
- * @t: time in seconds
- *
- * Computes the timeout values needed
- */
-
-static int ali_settimer(int t)
-{
- if(t < 0)
- return -EINVAL;
- else if(t < 60)
- ali_timeout_bits = t|(1<<6);
- else if(t < 3600)
- ali_timeout_bits = (t/60)|(1<<7);
- else if(t < 18000)
- ali_timeout_bits = (t/300)|(1<<6)|(1<<7);
- else return -EINVAL;
-
- timeout = t;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-/*
- * ali_write - writes to ALi watchdog
- * @file: file from VFS
- * @data: user address of data
- * @len: length of data
- * @ppos: pointer to the file offset
- *
- * Handle a write to the ALi watchdog. Writing to the file pings
- * the watchdog and resets it. Writing the magic 'V' sequence allows
- * the next close to turn off the watchdog.
- */
-
-static ssize_t ali_write(struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- ali_expect_release = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if(get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- ali_expect_release = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- ali_start();
- }
- return len;
-}
-
-/*
- * ali_ioctl - handle watchdog ioctls
- * @inode: VFS inode
- * @file: VFS file pointer
- * @cmd: ioctl number
- * @arg: arguments to the ioctl
- *
- * Handle the watchdog ioctls supported by the ALi driver. Really
- * we want an extension to enable irq ack monitoring and the like
- */
-
-static int ali_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "ALi M1535 WatchDog Timer",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- ali_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if (get_user (new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- ali_stop();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- ali_start();
- retval = 0;
- }
-
- return retval;
- }
-
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- if (ali_settimer(new_timeout))
- return -EINVAL;
-
- ali_keepalive();
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * ali_open - handle open of ali watchdog
- * @inode: inode from VFS
- * @file: file from VFS
- *
- * Open the ALi watchdog device. Ensure only one person opens it
- * at a time. Also start the watchdog running.
- */
-
-static int ali_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &ali_is_open))
- return -EBUSY;
-
- /* Activate */
- ali_start();
- return nonseekable_open(inode, file);
-}
-
-/*
- * ali_release - close an ALi watchdog
- * @inode: inode from VFS
- * @file: file from VFS
- *
- * Close the ALi watchdog device. Actual shutdown of the timer
- * only occurs if the magic sequence has been set.
- */
-
-static int ali_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- */
- if (ali_expect_release == 42) {
- ali_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- ali_keepalive();
- }
- clear_bit(0, &ali_is_open);
- ali_expect_release = 0;
- return 0;
-}
-
-/*
- * ali_notify_sys - System down notifier
- *
- * Notifier for system down
- */
-
-
-static int ali_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- ali_stop();
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Data for PCI driver interface
- *
- * This data only exists for exporting the supported
- * PCI ids via MODULE_DEVICE_TABLE. We do not actually
- * register a pci_driver, because someone else might one day
- * want to register another driver on the same PCI id.
- */
-
-static struct pci_device_id ali_pci_tbl[] = {
- { PCI_VENDOR_ID_AL, 0x1533, PCI_ANY_ID, PCI_ANY_ID,},
- { PCI_VENDOR_ID_AL, 0x1535, PCI_ANY_ID, PCI_ANY_ID,},
- { 0, },
-};
-MODULE_DEVICE_TABLE(pci, ali_pci_tbl);
-
-/*
- * ali_find_watchdog - find a 1535 and 7101
- *
- * Scans the PCI hardware for a 1535 series bridge and matching 7101
- * watchdog device. This may be overtight but it is better to be safe
- */
-
-static int __init ali_find_watchdog(void)
-{
- struct pci_dev *pdev;
- u32 wdog;
-
- /* Check for a 1533/1535 series bridge */
- pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x1535, NULL);
- if (pdev == NULL)
- pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x1533, NULL);
- if (pdev == NULL)
- return -ENODEV;
- pci_dev_put(pdev);
-
- /* Check for the a 7101 PMU */
- pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x7101, NULL);
- if(pdev == NULL)
- return -ENODEV;
-
- if(pci_enable_device(pdev)) {
- pci_dev_put(pdev);
- return -EIO;
- }
-
- ali_pci = pdev;
-
- /*
- * Initialize the timer bits
- */
- pci_read_config_dword(pdev, 0xCC, &wdog);
-
- wdog &= ~0x3F; /* Timer bits */
- wdog &= ~((1<<27)|(1<<26)|(1<<25)|(1<<24)); /* Issued events */
- wdog &= ~((1<<16)|(1<<13)|(1<<12)|(1<<11)|(1<<10)|(1<<9)); /* No monitor bits */
-
- pci_write_config_dword(pdev, 0xCC, wdog);
-
- return 0;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations ali_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ali_write,
- .ioctl = ali_ioctl,
- .open = ali_open,
- .release = ali_release,
-};
-
-static struct miscdevice ali_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ali_fops,
-};
-
-static struct notifier_block ali_notifier = {
- .notifier_call = ali_notify_sys,
-};
-
-/*
- * watchdog_init - module initialiser
- *
- * Scan for a suitable watchdog and if so initialize it. Return an error
- * if we cannot, the error causes the module to unload
- */
-
-static int __init watchdog_init(void)
-{
- int ret;
-
- spin_lock_init(&ali_lock);
-
- /* Check whether or not the hardware watchdog is there */
- if (ali_find_watchdog() != 0) {
- return -ENODEV;
- }
-
- /* Check that the timeout value is within it's range ; if not reset to the default */
- if (timeout < 1 || timeout >= 18000) {
- timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 0<timeout<18000, using %d\n",
- timeout);
- }
-
- /* Calculate the watchdog's timeout */
- ali_settimer(timeout);
-
- ret = misc_register(&ali_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto out;
- }
-
- ret = register_reboot_notifier(&ali_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto unreg_miscdev;
- }
-
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
-out:
- return ret;
-unreg_miscdev:
- misc_deregister(&ali_miscdev);
- goto out;
-}
-
-/*
- * watchdog_exit - module de-initialiser
- *
- * Called while unloading a successfully installed watchdog module.
- */
-
-static void __exit watchdog_exit(void)
-{
- /* Stop the timer before we leave */
- ali_stop();
-
- /* Deregister */
- unregister_reboot_notifier(&ali_notifier);
- misc_deregister(&ali_miscdev);
- pci_dev_put(ali_pci);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_DESCRIPTION("ALi M1535 PMU Watchdog Timer driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * ALi M7101 PMU Computer Watchdog Timer driver
- *
- * Based on w83877f_wdt.c by Scott Jennings <linuxdrivers@oro.net>
- * and the Cobalt kernel WDT timer driver by Tim Hockin
- * <thockin@cobaltnet.com>
- *
- * (c)2002 Steve Hill <steve@navaho.co.uk>
- *
- * This WDT driver is different from most other Linux WDT
- * drivers in that the driver will ping the watchdog by itself,
- * because this particular WDT has a very short timeout (1.6
- * seconds) and it would be insane to count on any userspace
- * daemon always getting scheduled within that time frame.
- *
- * Additions:
- * Aug 23, 2004 - Added use_gpio module parameter for use on revision a1d PMUs
- * found on very old cobalt hardware.
- * -- Mike Waychison <michael.waychison@sun.com>
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/pci.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define OUR_NAME "alim7101_wdt"
-#define PFX OUR_NAME ": "
-
-#define WDT_ENABLE 0x9C
-#define WDT_DISABLE 0x8C
-
-#define ALI_7101_WDT 0x92
-#define ALI_7101_GPIO 0x7D
-#define ALI_7101_GPIO_O 0x7E
-#define ALI_WDT_ARM 0x01
-
-/*
- * We're going to use a 1 second timeout.
- * If we reset the watchdog every ~250ms we should be safe. */
-
-#define WDT_INTERVAL (HZ/4+1)
-
-/*
- * We must not require too good response from the userspace daemon.
- * Here we require the userspace daemon to send us a heartbeat
- * char to /dev/watchdog every 30 seconds.
- */
-
-#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-static int use_gpio = 0; /* Use the pic (for a1d revision alim7101) */
-module_param(use_gpio, int, 0);
-MODULE_PARM_DESC(use_gpio, "Use the gpio watchdog. (required by old cobalt boards)");
-
-static void wdt_timer_ping(unsigned long);
-static DEFINE_TIMER(timer, wdt_timer_ping, 0, 1);
-static unsigned long next_heartbeat;
-static unsigned long wdt_is_open;
-static char wdt_expect_close;
-static struct pci_dev *alim7101_pmu;
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Whack the dog
- */
-
-static void wdt_timer_ping(unsigned long data)
-{
- /* If we got a heartbeat pulse within the WDT_US_INTERVAL
- * we agree to ping the WDT
- */
- char tmp;
-
- if(time_before(jiffies, next_heartbeat))
- {
- /* Ping the WDT (this is actually a disarm/arm sequence) */
- pci_read_config_byte(alim7101_pmu, 0x92, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
- if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
- | 0x20);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
- & ~0x20);
- }
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
- /* Re-set the timer interval */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-}
-
-/*
- * Utility routines
- */
-
-static void wdt_change(int writeval)
-{
- char tmp;
-
- pci_read_config_byte(alim7101_pmu, ALI_7101_WDT, &tmp);
- if (writeval == WDT_ENABLE) {
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
- if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp & ~0x20);
- }
-
- } else {
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
- if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp | 0x20);
- }
- }
-}
-
-static void wdt_startup(void)
-{
- next_heartbeat = jiffies + (timeout * HZ);
-
- /* We must enable before we kick off the timer in case the timer
- occurs as we ping it */
-
- wdt_change(WDT_ENABLE);
-
- /* Start the timer */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-
- printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
-}
-
-static void wdt_turnoff(void)
-{
- /* Stop the timer */
- del_timer_sync(&timer);
- wdt_change(WDT_DISABLE);
- printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
-}
-
-static void wdt_keepalive(void)
-{
- /* user land ping */
- next_heartbeat = jiffies + (timeout * HZ);
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count) {
- if (!nowayout) {
- size_t ofs;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- wdt_expect_close = 0;
-
- /* now scan */
- for (ofs = 0; ofs != count; ofs++) {
- char c;
- if (get_user(c, buf+ofs))
- return -EFAULT;
- if (c == 'V')
- wdt_expect_close = 42;
- }
- }
- /* someone wrote to us, we should restart timer */
- wdt_keepalive();
- }
- return count;
-}
-
-static int fop_open(struct inode * inode, struct file * file)
-{
- /* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
- /* Good, fire up the show */
- wdt_startup();
- return nonseekable_open(inode, file);
-}
-
-static int fop_close(struct inode * inode, struct file * file)
-{
- if(wdt_expect_close == 42)
- wdt_turnoff();
- else {
- /* wim: shouldn't there be a: del_timer(&timer); */
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
- }
- clear_bit(0, &wdt_is_open);
- wdt_expect_close = 0;
- return 0;
-}
-
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident =
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "ALiM7101",
- };
-
- switch(cmd)
- {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
-
- return retval;
- }
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
- default:
- return -ENOTTY;
- }
-}
-
-static const struct file_operations wdt_fops = {
- .owner= THIS_MODULE,
- .llseek= no_llseek,
- .write= fop_write,
- .open= fop_open,
- .release= fop_close,
- .ioctl= fop_ioctl,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor=WATCHDOG_MINOR,
- .name="watchdog",
- .fops=&wdt_fops,
-};
-
-/*
- * Notifier for system down
- */
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT)
- wdt_turnoff();
-
- if (code==SYS_RESTART) {
- /*
- * Cobalt devices have no way of rebooting themselves other than
- * getting the watchdog to pull reset, so we restart the watchdog on
- * reboot with no heartbeat
- */
- wdt_change(WDT_ENABLE);
- printk(KERN_INFO PFX "Watchdog timer is now enabled with no heartbeat - should reboot in ~1 second.\n");
- }
- return NOTIFY_DONE;
-}
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier=
-{
- .notifier_call = wdt_notify_sys,
-};
-
-static void __exit alim7101_wdt_unload(void)
-{
- wdt_turnoff();
- /* Deregister */
- misc_deregister(&wdt_miscdev);
- unregister_reboot_notifier(&wdt_notifier);
- pci_dev_put(alim7101_pmu);
-}
-
-static int __init alim7101_wdt_init(void)
-{
- int rc = -EBUSY;
- struct pci_dev *ali1543_south;
- char tmp;
-
- printk(KERN_INFO PFX "Steve Hill <steve@navaho.co.uk>.\n");
- alim7101_pmu = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101,
- NULL);
- if (!alim7101_pmu) {
- printk(KERN_INFO PFX "ALi M7101 PMU not present - WDT not set\n");
- return -EBUSY;
- }
-
- /* Set the WDT in the PMU to 1 second */
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, 0x02);
-
- ali1543_south = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
- NULL);
- if (!ali1543_south) {
- printk(KERN_INFO PFX "ALi 1543 South-Bridge not present - WDT not set\n");
- goto err_out;
- }
- pci_read_config_byte(ali1543_south, 0x5e, &tmp);
- pci_dev_put(ali1543_south);
- if ((tmp & 0x1e) == 0x00) {
- if (!use_gpio) {
- printk(KERN_INFO PFX "Detected old alim7101 revision 'a1d'. If this is a cobalt board, set the 'use_gpio' module parameter.\n");
- goto err_out;
- }
- nowayout = 1;
- } else if ((tmp & 0x1e) != 0x12 && (tmp & 0x1e) != 0x00) {
- printk(KERN_INFO PFX "ALi 1543 South-Bridge does not have the correct revision number (???1001?) - WDT not set\n");
- goto err_out;
- }
-
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
- timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
- }
-
- rc = misc_register(&wdt_miscdev);
- if (rc) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
- goto err_out;
- }
-
- rc = register_reboot_notifier(&wdt_notifier);
- if (rc) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
- }
-
- if (nowayout) {
- __module_get(THIS_MODULE);
- }
-
- printk(KERN_INFO PFX "WDT driver for ALi M7101 initialised. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
- return 0;
-
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
-err_out:
- pci_dev_put(alim7101_pmu);
- return rc;
-}
-
-module_init(alim7101_wdt_init);
-module_exit(alim7101_wdt_unload);
-
-static struct pci_device_id alim7101_pci_tbl[] __devinitdata = {
- { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533) },
- { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) },
- { }
-};
-
-MODULE_DEVICE_TABLE(pci, alim7101_pci_tbl);
-
-MODULE_AUTHOR("Steve Hill");
-MODULE_DESCRIPTION("ALi M7101 PMU Computer Watchdog Timer driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog driver for Atmel AT32AP700X devices
- *
- * Copyright (C) 2005-2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/miscdevice.h>
-#include <linux/fs.h>
-#include <linux/platform_device.h>
-#include <linux/watchdog.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-
-#define TIMEOUT_MIN 1
-#define TIMEOUT_MAX 2
-#define TIMEOUT_DEFAULT TIMEOUT_MAX
-
-/* module parameters */
-static int timeout = TIMEOUT_DEFAULT;
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,
- "Timeout value. Limited to be 1 or 2 seconds. (default="
- __MODULE_STRING(TIMEOUT_DEFAULT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/* Watchdog registers and write/read macro */
-#define WDT_CTRL 0x00
-#define WDT_CTRL_EN 0
-#define WDT_CTRL_PSEL 8
-#define WDT_CTRL_KEY 24
-
-#define WDT_CLR 0x04
-
-#define WDT_BIT(name) (1 << WDT_##name)
-#define WDT_BF(name, value) ((value) << WDT_##name)
-
-#define wdt_readl(dev, reg) \
- __raw_readl((dev)->regs + WDT_##reg)
-#define wdt_writel(dev, reg, value) \
- __raw_writel((value), (dev)->regs + WDT_##reg)
-
-struct wdt_at32ap700x {
- void __iomem *regs;
- spinlock_t io_lock;
- int timeout;
- unsigned long users;
- struct miscdevice miscdev;
-};
-
-static struct wdt_at32ap700x *wdt;
-static char expect_release;
-
-/*
- * Disable the watchdog.
- */
-static inline void at32_wdt_stop(void)
-{
- unsigned long psel;
-
- spin_lock(&wdt->io_lock);
- psel = wdt_readl(wdt, CTRL) & WDT_BF(CTRL_PSEL, 0x0f);
- wdt_writel(wdt, CTRL, psel | WDT_BF(CTRL_KEY, 0x55));
- wdt_writel(wdt, CTRL, psel | WDT_BF(CTRL_KEY, 0xaa));
- spin_unlock(&wdt->io_lock);
-}
-
-/*
- * Enable and reset the watchdog.
- */
-static inline void at32_wdt_start(void)
-{
- /* 0xf is 2^16 divider = 2 sec, 0xe is 2^15 divider = 1 sec */
- unsigned long psel = (wdt->timeout > 1) ? 0xf : 0xe;
-
- spin_lock(&wdt->io_lock);
- wdt_writel(wdt, CTRL, WDT_BIT(CTRL_EN)
- | WDT_BF(CTRL_PSEL, psel)
- | WDT_BF(CTRL_KEY, 0x55));
- wdt_writel(wdt, CTRL, WDT_BIT(CTRL_EN)
- | WDT_BF(CTRL_PSEL, psel)
- | WDT_BF(CTRL_KEY, 0xaa));
- spin_unlock(&wdt->io_lock);
-}
-
-/*
- * Pat the watchdog timer.
- */
-static inline void at32_wdt_pat(void)
-{
- spin_lock(&wdt->io_lock);
- wdt_writel(wdt, CLR, 0x42);
- spin_unlock(&wdt->io_lock);
-}
-
-/*
- * Watchdog device is opened, and watchdog starts running.
- */
-static int at32_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(1, &wdt->users))
- return -EBUSY;
-
- at32_wdt_start();
- return nonseekable_open(inode, file);
-}
-
-/*
- * Close the watchdog device.
- */
-static int at32_wdt_close(struct inode *inode, struct file *file)
-{
- if (expect_release == 42) {
- at32_wdt_stop();
- } else {
- dev_dbg(wdt->miscdev.parent,
- "Unexpected close, not stopping watchdog!\n");
- at32_wdt_pat();
- }
- clear_bit(1, &wdt->users);
- expect_release = 0;
- return 0;
-}
-
-/*
- * Change the watchdog time interval.
- */
-static int at32_wdt_settimeout(int time)
-{
- /*
- * All counting occurs at 1 / SLOW_CLOCK (32 kHz) and max prescaler is
- * 2 ^ 16 allowing up to 2 seconds timeout.
- */
- if ((time < TIMEOUT_MIN) || (time > TIMEOUT_MAX))
- return -EINVAL;
-
- /*
- * Set new watchdog time. It will be used when at32_wdt_start() is
- * called.
- */
- wdt->timeout = time;
- return 0;
-}
-
-static struct watchdog_info at32_wdt_info = {
- .identity = "at32ap700x watchdog",
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
-};
-
-/*
- * Handle commands from user-space.
- */
-static int at32_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int ret = -ENOTTY;
- int time;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
-
- switch (cmd) {
- case WDIOC_KEEPALIVE:
- at32_wdt_pat();
- ret = 0;
- break;
- case WDIOC_GETSUPPORT:
- ret = copy_to_user(argp, &at32_wdt_info,
- sizeof(at32_wdt_info)) ? -EFAULT : 0;
- break;
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, p);
- if (ret)
- break;
- ret = at32_wdt_settimeout(time);
- if (ret)
- break;
- /* Enable new time value */
- at32_wdt_start();
- /* fall through */
- case WDIOC_GETTIMEOUT:
- ret = put_user(wdt->timeout, p);
- break;
- case WDIOC_GETSTATUS: /* fall through */
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, p);
- break;
- case WDIOC_SETOPTIONS:
- ret = get_user(time, p);
- if (ret)
- break;
- if (time & WDIOS_DISABLECARD)
- at32_wdt_stop();
- if (time & WDIOS_ENABLECARD)
- at32_wdt_start();
- ret = 0;
- break;
- }
-
- return ret;
-}
-
-static ssize_t at32_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /*
- * note: just in case someone wrote the magic
- * character five months ago...
- */
- expect_release = 0;
-
- /*
- * scan to see whether or not we got the magic
- * character
- */
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_release = 42;
- }
- }
- /* someone wrote to us, we should pat the watchdog */
- at32_wdt_pat();
- }
- return len;
-}
-
-static const struct file_operations at32_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = at32_wdt_ioctl,
- .open = at32_wdt_open,
- .release = at32_wdt_close,
- .write = at32_wdt_write,
-};
-
-static int __init at32_wdt_probe(struct platform_device *pdev)
-{
- struct resource *regs;
- int ret;
-
- if (wdt) {
- dev_dbg(&pdev->dev, "only 1 wdt instance supported.\n");
- return -EBUSY;
- }
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_dbg(&pdev->dev, "missing mmio resource\n");
- return -ENXIO;
- }
-
- wdt = kzalloc(sizeof(struct wdt_at32ap700x), GFP_KERNEL);
- if (!wdt) {
- dev_dbg(&pdev->dev, "no memory for wdt structure\n");
- return -ENOMEM;
- }
-
- wdt->regs = ioremap(regs->start, regs->end - regs->start + 1);
- if (!wdt->regs) {
- ret = -ENOMEM;
- dev_dbg(&pdev->dev, "could not map I/O memory\n");
- goto err_free;
- }
- spin_lock_init(&wdt->io_lock);
- wdt->users = 0;
- wdt->miscdev.minor = WATCHDOG_MINOR;
- wdt->miscdev.name = "watchdog";
- wdt->miscdev.fops = &at32_wdt_fops;
-
- if (at32_wdt_settimeout(timeout)) {
- at32_wdt_settimeout(TIMEOUT_DEFAULT);
- dev_dbg(&pdev->dev,
- "default timeout invalid, set to %d sec.\n",
- TIMEOUT_DEFAULT);
- }
-
- ret = misc_register(&wdt->miscdev);
- if (ret) {
- dev_dbg(&pdev->dev, "failed to register wdt miscdev\n");
- goto err_iounmap;
- }
-
- platform_set_drvdata(pdev, wdt);
- wdt->miscdev.parent = &pdev->dev;
- dev_info(&pdev->dev,
- "AT32AP700X WDT at 0x%p, timeout %d sec (nowayout=%d)\n",
- wdt->regs, wdt->timeout, nowayout);
-
- return 0;
-
-err_iounmap:
- iounmap(wdt->regs);
-err_free:
- kfree(wdt);
- wdt = NULL;
- return ret;
-}
-
-static int __exit at32_wdt_remove(struct platform_device *pdev)
-{
- if (wdt && platform_get_drvdata(pdev) == wdt) {
- /* Stop the timer before we leave */
- if (!nowayout)
- at32_wdt_stop();
-
- misc_deregister(&wdt->miscdev);
- iounmap(wdt->regs);
- kfree(wdt);
- wdt = NULL;
- platform_set_drvdata(pdev, NULL);
- }
-
- return 0;
-}
-
-static void at32_wdt_shutdown(struct platform_device *pdev)
-{
- at32_wdt_stop();
-}
-
-#ifdef CONFIG_PM
-static int at32_wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
- at32_wdt_stop();
- return 0;
-}
-
-static int at32_wdt_resume(struct platform_device *pdev)
-{
- if (wdt->users)
- at32_wdt_start();
- return 0;
-}
-#else
-#define at32_wdt_suspend NULL
-#define at32_wdt_resume NULL
-#endif
-
-static struct platform_driver at32_wdt_driver = {
- .remove = __exit_p(at32_wdt_remove),
- .suspend = at32_wdt_suspend,
- .resume = at32_wdt_resume,
- .driver = {
- .name = "at32_wdt",
- .owner = THIS_MODULE,
- },
- .shutdown = at32_wdt_shutdown,
-};
-
-static int __init at32_wdt_init(void)
-{
- return platform_driver_probe(&at32_wdt_driver, at32_wdt_probe);
-}
-module_init(at32_wdt_init);
-
-static void __exit at32_wdt_exit(void)
-{
- platform_driver_unregister(&at32_wdt_driver);
-}
-module_exit(at32_wdt_exit);
-
-MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
-MODULE_DESCRIPTION("Watchdog driver for Atmel AT32AP700X");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog driver for Atmel AT91RM9200 (Thunder)
- *
- * Copyright (C) 2003 SAN People (Pty) Ltd
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <asm/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/arch/at91_st.h>
-
-
-#define WDT_DEFAULT_TIME 5 /* seconds */
-#define WDT_MAX_TIME 256 /* seconds */
-
-static int wdt_time = WDT_DEFAULT_TIME;
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-#endif
-
-
-static unsigned long at91wdt_busy;
-
-/* ......................................................................... */
-
-/*
- * Disable the watchdog.
- */
-static void inline at91_wdt_stop(void)
-{
- at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
-}
-
-/*
- * Enable and reset the watchdog.
- */
-static void inline at91_wdt_start(void)
-{
- at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
- at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
-}
-
-/*
- * Reload the watchdog timer. (ie, pat the watchdog)
- */
-static void inline at91_wdt_reload(void)
-{
- at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
-}
-
-/* ......................................................................... */
-
-/*
- * Watchdog device is opened, and watchdog starts running.
- */
-static int at91_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &at91wdt_busy))
- return -EBUSY;
-
- at91_wdt_start();
- return nonseekable_open(inode, file);
-}
-
-/*
- * Close the watchdog device.
- * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
- * disabled.
- */
-static int at91_wdt_close(struct inode *inode, struct file *file)
-{
- if (!nowayout)
- at91_wdt_stop(); /* Disable the watchdog when file is closed */
-
- clear_bit(0, &at91wdt_busy);
- return 0;
-}
-
-/*
- * Change the watchdog time interval.
- */
-static int at91_wdt_settimeout(int new_time)
-{
- /*
- * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
- *
- * Since WDV is a 16-bit counter, the maximum period is
- * 65536 / 0.256 = 256 seconds.
- */
- if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
- return -EINVAL;
-
- /* Set new watchdog time. It will be used when at91_wdt_start() is called. */
- wdt_time = new_time;
- return 0;
-}
-
-static struct watchdog_info at91_wdt_info = {
- .identity = "at91 watchdog",
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
-};
-
-/*
- * Handle commands from user-space.
- */
-static int at91_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_value;
-
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- at91_wdt_reload(); /* pat the watchdog */
- return 0;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (at91_wdt_settimeout(new_value))
- return -EINVAL;
-
- /* Enable new time value */
- at91_wdt_start();
-
- /* Return current value */
- return put_user(wdt_time, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdt_time, p);
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (new_value & WDIOS_DISABLECARD)
- at91_wdt_stop();
- if (new_value & WDIOS_ENABLECARD)
- at91_wdt_start();
- return 0;
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Pat the watchdog whenever device is written to.
- */
-static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- at91_wdt_reload(); /* pat the watchdog */
- return len;
-}
-
-/* ......................................................................... */
-
-static const struct file_operations at91wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = at91_wdt_ioctl,
- .open = at91_wdt_open,
- .release = at91_wdt_close,
- .write = at91_wdt_write,
-};
-
-static struct miscdevice at91wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &at91wdt_fops,
-};
-
-static int __init at91wdt_probe(struct platform_device *pdev)
-{
- int res;
-
- if (at91wdt_miscdev.parent)
- return -EBUSY;
- at91wdt_miscdev.parent = &pdev->dev;
-
- res = misc_register(&at91wdt_miscdev);
- if (res)
- return res;
-
- printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
- return 0;
-}
-
-static int __exit at91wdt_remove(struct platform_device *pdev)
-{
- int res;
-
- res = misc_deregister(&at91wdt_miscdev);
- if (!res)
- at91wdt_miscdev.parent = NULL;
-
- return res;
-}
-
-static void at91wdt_shutdown(struct platform_device *pdev)
-{
- at91_wdt_stop();
-}
-
-#ifdef CONFIG_PM
-
-static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
- at91_wdt_stop();
- return 0;
-}
-
-static int at91wdt_resume(struct platform_device *pdev)
-{
- if (at91wdt_busy)
- at91_wdt_start();
- return 0;
-}
-
-#else
-#define at91wdt_suspend NULL
-#define at91wdt_resume NULL
-#endif
-
-static struct platform_driver at91wdt_driver = {
- .probe = at91wdt_probe,
- .remove = __exit_p(at91wdt_remove),
- .shutdown = at91wdt_shutdown,
- .suspend = at91wdt_suspend,
- .resume = at91wdt_resume,
- .driver = {
- .name = "at91_wdt",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init at91_wdt_init(void)
-{
- /* Check that the heartbeat value is within range; if not reset to the default */
- if (at91_wdt_settimeout(wdt_time)) {
- at91_wdt_settimeout(WDT_DEFAULT_TIME);
- pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);
- }
-
- return platform_driver_register(&at91wdt_driver);
-}
-
-static void __exit at91_wdt_exit(void)
-{
- platform_driver_unregister(&at91wdt_driver);
-}
-
-module_init(at91_wdt_init);
-module_exit(at91_wdt_exit);
-
-MODULE_AUTHOR("Andrew Victor");
-MODULE_DESCRIPTION("Watchdog driver for Atmel AT91RM9200");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Blackfin On-Chip Watchdog Driver
- * Supports BF53[123]/BF53[467]/BF54[2489]/BF561
- *
- * Originally based on softdog.c
- * Copyright 2006-2007 Analog Devices Inc.
- * Copyright 2006-2007 Michele d'Amico
- * Copyright 1996 Alan Cox <alan@redhat.com>
- *
- * Enter bugs at http://blackfin.uclinux.org/
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <asm/blackfin.h>
-#include <asm/uaccess.h>
-
-#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
-#define stampit() stamp("here i am")
-
-#define WATCHDOG_NAME "bfin-wdt"
-#define PFX WATCHDOG_NAME ": "
-
-/* The BF561 has two watchdogs (one per core), but since Linux
- * only runs on core A, we'll just work with that one.
- */
-#ifdef BF561_FAMILY
-# define bfin_read_WDOG_CTL() bfin_read_WDOGA_CTL()
-# define bfin_read_WDOG_CNT() bfin_read_WDOGA_CNT()
-# define bfin_read_WDOG_STAT() bfin_read_WDOGA_STAT()
-# define bfin_write_WDOG_CTL(x) bfin_write_WDOGA_CTL(x)
-# define bfin_write_WDOG_CNT(x) bfin_write_WDOGA_CNT(x)
-# define bfin_write_WDOG_STAT(x) bfin_write_WDOGA_STAT(x)
-#endif
-
-/* Bit in SWRST that indicates boot caused by watchdog */
-#define SWRST_RESET_WDOG 0x4000
-
-/* Bit in WDOG_CTL that indicates watchdog has expired (WDR0) */
-#define WDOG_EXPIRED 0x8000
-
-/* Masks for WDEV field in WDOG_CTL register */
-#define ICTL_RESET 0x0
-#define ICTL_NMI 0x2
-#define ICTL_GPI 0x4
-#define ICTL_NONE 0x6
-#define ICTL_MASK 0x6
-
-/* Masks for WDEN field in WDOG_CTL register */
-#define WDEN_MASK 0x0FF0
-#define WDEN_ENABLE 0x0000
-#define WDEN_DISABLE 0x0AD0
-
-/* some defaults */
-#define WATCHDOG_TIMEOUT 20
-
-static unsigned int timeout = WATCHDOG_TIMEOUT;
-static int nowayout = WATCHDOG_NOWAYOUT;
-static struct watchdog_info bfin_wdt_info;
-static unsigned long open_check;
-static char expect_close;
-static spinlock_t bfin_wdt_spinlock = SPIN_LOCK_UNLOCKED;
-
-/**
- * bfin_wdt_keepalive - Keep the Userspace Watchdog Alive
- *
- * The Userspace watchdog got a KeepAlive: schedule the next timeout.
- */
-static int bfin_wdt_keepalive(void)
-{
- stampit();
- bfin_write_WDOG_STAT(0);
- return 0;
-}
-
-/**
- * bfin_wdt_stop - Stop the Watchdog
- *
- * Stops the on-chip watchdog.
- */
-static int bfin_wdt_stop(void)
-{
- stampit();
- bfin_write_WDOG_CTL(WDEN_DISABLE);
- return 0;
-}
-
-/**
- * bfin_wdt_start - Start the Watchdog
- *
- * Starts the on-chip watchdog. Automatically loads WDOG_CNT
- * into WDOG_STAT for us.
- */
-static int bfin_wdt_start(void)
-{
- stampit();
- bfin_write_WDOG_CTL(WDEN_ENABLE | ICTL_RESET);
- return 0;
-}
-
-/**
- * bfin_wdt_running - Check Watchdog status
- *
- * See if the watchdog is running.
- */
-static int bfin_wdt_running(void)
-{
- stampit();
- return ((bfin_read_WDOG_CTL() & WDEN_MASK) != WDEN_DISABLE);
-}
-
-/**
- * bfin_wdt_set_timeout - Set the Userspace Watchdog timeout
- * @t: new timeout value (in seconds)
- *
- * Translate the specified timeout in seconds into System Clock
- * terms which is what the on-chip Watchdog requires.
- */
-static int bfin_wdt_set_timeout(unsigned long t)
-{
- u32 cnt;
- unsigned long flags;
-
- stampit();
-
- cnt = t * get_sclk();
- if (cnt < get_sclk()) {
- printk(KERN_WARNING PFX "timeout value is too large\n");
- return -EINVAL;
- }
-
- spin_lock_irqsave(&bfin_wdt_spinlock, flags);
- {
- int run = bfin_wdt_running();
- bfin_wdt_stop();
- bfin_write_WDOG_CNT(cnt);
- if (run) bfin_wdt_start();
- }
- spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
-
- timeout = t;
-
- return 0;
-}
-
-/**
- * bfin_wdt_open - Open the Device
- * @inode: inode of device
- * @file: file handle of device
- *
- * Watchdog device is opened and started.
- */
-static int bfin_wdt_open(struct inode *inode, struct file *file)
-{
- stampit();
-
- if (test_and_set_bit(0, &open_check))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- bfin_wdt_keepalive();
- bfin_wdt_start();
-
- return nonseekable_open(inode, file);
-}
-
-/**
- * bfin_wdt_close - Close the Device
- * @inode: inode of device
- * @file: file handle of device
- *
- * Watchdog device is closed and stopped.
- */
-static int bfin_wdt_release(struct inode *inode, struct file *file)
-{
- stampit();
-
- if (expect_close == 42) {
- bfin_wdt_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- bfin_wdt_keepalive();
- }
-
- expect_close = 0;
- clear_bit(0, &open_check);
-
- return 0;
-}
-
-/**
- * bfin_wdt_write - Write to Device
- * @file: file handle of device
- * @buf: buffer to write
- * @count: length of buffer
- * @ppos: offset
- *
- * Pings the watchdog on write.
- */
-static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- stampit();
-
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- bfin_wdt_keepalive();
- }
-
- return len;
-}
-
-/**
- * bfin_wdt_ioctl - Query Device
- * @inode: inode of device
- * @file: file handle of device
- * @cmd: watchdog command
- * @arg: argument
- *
- * Query basic information from the device or ping it, as outlined by the
- * watchdog API.
- */
-static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
-
- stampit();
-
- switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
- return -EFAULT;
- else
- return 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
-
- case WDIOC_KEEPALIVE:
- bfin_wdt_keepalive();
- return 0;
-
- case WDIOC_SETTIMEOUT: {
- int new_timeout;
-
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- if (bfin_wdt_set_timeout(new_timeout))
- return -EINVAL;
- }
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS: {
- unsigned long flags;
- int options, ret = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- spin_lock_irqsave(&bfin_wdt_spinlock, flags);
-
- if (options & WDIOS_DISABLECARD) {
- bfin_wdt_stop();
- ret = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- bfin_wdt_start();
- ret = 0;
- }
-
- spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
-
- return ret;
- }
- }
-}
-
-/**
- * bfin_wdt_notify_sys - Notifier Handler
- * @this: notifier block
- * @code: notifier event
- * @unused: unused
- *
- * Handles specific events, such as turning off the watchdog during a
- * shutdown event.
- */
-static int bfin_wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- stampit();
-
- if (code == SYS_DOWN || code == SYS_HALT)
- bfin_wdt_stop();
-
- return NOTIFY_DONE;
-}
-
-#ifdef CONFIG_PM
-static int state_before_suspend;
-
-/**
- * bfin_wdt_suspend - suspend the watchdog
- * @pdev: device being suspended
- * @state: requested suspend state
- *
- * Remember if the watchdog was running and stop it.
- * TODO: is this even right? Doesn't seem to be any
- * standard in the watchdog world ...
- */
-static int bfin_wdt_suspend(struct platform_device *pdev, pm_message_t state)
-{
- stampit();
-
- state_before_suspend = bfin_wdt_running();
- bfin_wdt_stop();
-
- return 0;
-}
-
-/**
- * bfin_wdt_resume - resume the watchdog
- * @pdev: device being resumed
- *
- * If the watchdog was running, turn it back on.
- */
-static int bfin_wdt_resume(struct platform_device *pdev)
-{
- stampit();
-
- if (state_before_suspend) {
- bfin_wdt_set_timeout(timeout);
- bfin_wdt_start();
- }
-
- return 0;
-}
-#else
-# define bfin_wdt_suspend NULL
-# define bfin_wdt_resume NULL
-#endif
-
-static struct platform_device bfin_wdt_device = {
- .name = WATCHDOG_NAME,
- .id = -1,
-};
-
-static struct platform_driver bfin_wdt_driver = {
- .driver = {
- .name = WATCHDOG_NAME,
- .owner = THIS_MODULE,
- },
- .suspend = bfin_wdt_suspend,
- .resume = bfin_wdt_resume,
-};
-
-static struct file_operations bfin_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = bfin_wdt_write,
- .ioctl = bfin_wdt_ioctl,
- .open = bfin_wdt_open,
- .release = bfin_wdt_release,
-};
-
-static struct miscdevice bfin_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &bfin_wdt_fops,
-};
-
-static struct watchdog_info bfin_wdt_info = {
- .identity = "Blackfin Watchdog",
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
-};
-
-static struct notifier_block bfin_wdt_notifier = {
- .notifier_call = bfin_wdt_notify_sys,
-};
-
-/**
- * bfin_wdt_init - Initialize module
- *
- * Registers the device and notifier handler. Actual device
- * initialization is handled by bfin_wdt_open().
- */
-static int __init bfin_wdt_init(void)
-{
- int ret;
-
- stampit();
-
- /* Check that the timeout value is within range */
- if (bfin_wdt_set_timeout(timeout))
- return -EINVAL;
-
- /* Since this is an on-chip device and needs no board-specific
- * resources, we'll handle all the platform device stuff here.
- */
- ret = platform_device_register(&bfin_wdt_device);
- if (ret)
- return ret;
-
- ret = platform_driver_probe(&bfin_wdt_driver, NULL);
- if (ret)
- return ret;
-
- ret = register_reboot_notifier(&bfin_wdt_notifier);
- if (ret) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
- return ret;
- }
-
- ret = misc_register(&bfin_wdt_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&bfin_wdt_notifier);
- return ret;
- }
-
- printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
- return 0;
-}
-
-/**
- * bfin_wdt_exit - Deinitialize module
- *
- * Unregisters the device and notifier handler. Actual device
- * deinitialization is handled by bfin_wdt_close().
- */
-static void __exit bfin_wdt_exit(void)
-{
- misc_deregister(&bfin_wdt_miscdev);
- unregister_reboot_notifier(&bfin_wdt_notifier);
-}
-
-module_init(bfin_wdt_init);
-module_exit(bfin_wdt_exit);
-
-MODULE_AUTHOR("Michele d'Amico, Mike Frysinger <vapier@gentoo.org>");
-MODULE_DESCRIPTION("Blackfin Watchdog Device Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(timeout, uint, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+++ /dev/null
-/*
- * drivers/char/watchdog/booke_wdt.c
- *
- * Watchdog timer for PowerPC Book-E systems
- *
- * Author: Matthew McClintock
- * Maintainer: Kumar Gala <galak@kernel.crashing.org>
- *
- * Copyright 2005 Freescale Semiconductor Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/notifier.h>
-#include <linux/watchdog.h>
-
-#include <asm/reg_booke.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/* If the kernel parameter wdt=1, the watchdog will be enabled at boot.
- * Also, the wdt_period sets the watchdog timer period timeout.
- * For E500 cpus the wdt_period sets which bit changing from 0->1 will
- * trigger a watchog timeout. This watchdog timeout will occur 3 times, the
- * first time nothing will happen, the second time a watchdog exception will
- * occur, and the final time the board will reset.
- */
-
-#ifdef CONFIG_FSL_BOOKE
-#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
-#else
-#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
-#endif /* for timing information */
-
-u32 booke_wdt_enabled = 0;
-u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
-
-#ifdef CONFIG_FSL_BOOKE
-#define WDTP(x) ((((63-x)&0x3)<<30)|(((63-x)&0x3c)<<15))
-#else
-#define WDTP(x) (TCR_WP(x))
-#endif
-
-/*
- * booke_wdt_ping:
- */
-static __inline__ void booke_wdt_ping(void)
-{
- mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
-}
-
-/*
- * booke_wdt_enable:
- */
-static __inline__ void booke_wdt_enable(void)
-{
- u32 val;
-
- /* clear status before enabling watchdog */
- booke_wdt_ping();
- val = mfspr(SPRN_TCR);
- val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
-
- mtspr(SPRN_TCR, val);
-}
-
-/*
- * booke_wdt_write:
- */
-static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- booke_wdt_ping();
- return count;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .firmware_version = 0,
- .identity = "PowerPC Book-E Watchdog",
-};
-
-/*
- * booke_wdt_ioctl:
- */
-static int booke_wdt_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- u32 tmp = 0;
- u32 __user *p = (u32 __user *)arg;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user ((struct watchdog_info __user *) arg, &ident,
- sizeof(struct watchdog_info)))
- return -EFAULT;
- case WDIOC_GETSTATUS:
- return put_user(ident.options, p);
- case WDIOC_GETBOOTSTATUS:
- /* XXX: something is clearing TSR */
- tmp = mfspr(SPRN_TSR) & TSR_WRS(3);
- /* returns 1 if last reset was caused by the WDT */
- return (tmp ? 1 : 0);
- case WDIOC_KEEPALIVE:
- booke_wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(booke_wdt_period, p))
- return -EFAULT;
- mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(booke_wdt_period, p);
- case WDIOC_SETOPTIONS:
- if (get_user(tmp, p))
- return -EINVAL;
- if (tmp == WDIOS_ENABLECARD) {
- booke_wdt_ping();
- break;
- } else
- return -EINVAL;
- return 0;
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-/*
- * booke_wdt_open:
- */
-static int booke_wdt_open (struct inode *inode, struct file *file)
-{
- if (booke_wdt_enabled == 0) {
- booke_wdt_enabled = 1;
- booke_wdt_enable();
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
- booke_wdt_period);
- }
-
- return nonseekable_open(inode, file);
-}
-
-static const struct file_operations booke_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = booke_wdt_write,
- .ioctl = booke_wdt_ioctl,
- .open = booke_wdt_open,
-};
-
-static struct miscdevice booke_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &booke_wdt_fops,
-};
-
-static void __exit booke_wdt_exit(void)
-{
- misc_deregister(&booke_wdt_miscdev);
-}
-
-/*
- * booke_wdt_init:
- */
-static int __init booke_wdt_init(void)
-{
- int ret = 0;
-
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
- ident.firmware_version = cur_cpu_spec->pvr_value;
-
- ret = misc_register(&booke_wdt_miscdev);
- if (ret) {
- printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- return ret;
- }
-
- if (booke_wdt_enabled == 1) {
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
- booke_wdt_period);
- booke_wdt_enable();
- }
-
- return ret;
-}
-device_initcall(booke_wdt_init);
+++ /dev/null
-/*
- * sma cpu5 watchdog driver
- *
- * Copyright (C) 2003 Heiko Ronsdorf <hero@ihg.uni-duisburg.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/miscdevice.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/timer.h>
-#include <linux/completion.h>
-#include <linux/jiffies.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include <linux/watchdog.h>
-
-/* adjustable parameters */
-
-static int verbose = 0;
-static int port = 0x91;
-static int ticks = 10000;
-
-#define PFX "cpu5wdt: "
-
-#define CPU5WDT_EXTENT 0x0A
-
-#define CPU5WDT_STATUS_REG 0x00
-#define CPU5WDT_TIME_A_REG 0x02
-#define CPU5WDT_TIME_B_REG 0x03
-#define CPU5WDT_MODE_REG 0x04
-#define CPU5WDT_TRIGGER_REG 0x07
-#define CPU5WDT_ENABLE_REG 0x08
-#define CPU5WDT_RESET_REG 0x09
-
-#define CPU5WDT_INTERVAL (HZ/10+1)
-
-/* some device data */
-
-static struct {
- struct completion stop;
- volatile int running;
- struct timer_list timer;
- volatile int queue;
- int default_ticks;
- unsigned long inuse;
-} cpu5wdt_device;
-
-/* generic helper functions */
-
-static void cpu5wdt_trigger(unsigned long unused)
-{
- if ( verbose > 2 )
- printk(KERN_DEBUG PFX "trigger at %i ticks\n", ticks);
-
- if( cpu5wdt_device.running )
- ticks--;
-
- /* keep watchdog alive */
- outb(1, port + CPU5WDT_TRIGGER_REG);
-
- /* requeue?? */
- if (cpu5wdt_device.queue && ticks)
- mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL);
- else {
- /* ticks doesn't matter anyway */
- complete(&cpu5wdt_device.stop);
- }
-
-}
-
-static void cpu5wdt_reset(void)
-{
- ticks = cpu5wdt_device.default_ticks;
-
- if ( verbose )
- printk(KERN_DEBUG PFX "reset (%i ticks)\n", (int) ticks);
-
-}
-
-static void cpu5wdt_start(void)
-{
- if ( !cpu5wdt_device.queue ) {
- cpu5wdt_device.queue = 1;
- outb(0, port + CPU5WDT_TIME_A_REG);
- outb(0, port + CPU5WDT_TIME_B_REG);
- outb(1, port + CPU5WDT_MODE_REG);
- outb(0, port + CPU5WDT_RESET_REG);
- outb(0, port + CPU5WDT_ENABLE_REG);
- mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL);
- }
- /* if process dies, counter is not decremented */
- cpu5wdt_device.running++;
-}
-
-static int cpu5wdt_stop(void)
-{
- if ( cpu5wdt_device.running )
- cpu5wdt_device.running = 0;
-
- ticks = cpu5wdt_device.default_ticks;
-
- if ( verbose )
- printk(KERN_CRIT PFX "stop not possible\n");
-
- return -EIO;
-}
-
-/* filesystem operations */
-
-static int cpu5wdt_open(struct inode *inode, struct file *file)
-{
- if ( test_and_set_bit(0, &cpu5wdt_device.inuse) )
- return -EBUSY;
-
- return nonseekable_open(inode, file);
-}
-
-static int cpu5wdt_release(struct inode *inode, struct file *file)
-{
- clear_bit(0, &cpu5wdt_device.inuse);
- return 0;
-}
-
-static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- unsigned int value;
- static struct watchdog_info ident =
- {
- .options = WDIOF_CARDRESET,
- .identity = "CPU5 WDT",
- };
-
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- cpu5wdt_reset();
- break;
- case WDIOC_GETSTATUS:
- value = inb(port + CPU5WDT_STATUS_REG);
- value = (value >> 2) & 1;
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETBOOTSTATUS:
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETSUPPORT:
- if ( copy_to_user(argp, &ident, sizeof(ident)) )
- return -EFAULT;
- break;
- case WDIOC_SETOPTIONS:
- if ( copy_from_user(&value, argp, sizeof(int)) )
- return -EFAULT;
- switch(value) {
- case WDIOS_ENABLECARD:
- cpu5wdt_start();
- break;
- case WDIOS_DISABLECARD:
- return cpu5wdt_stop();
- default:
- return -EINVAL;
- }
- break;
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static ssize_t cpu5wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if ( !count )
- return -EIO;
-
- cpu5wdt_reset();
-
- return count;
-}
-
-static const struct file_operations cpu5wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = cpu5wdt_ioctl,
- .open = cpu5wdt_open,
- .write = cpu5wdt_write,
- .release = cpu5wdt_release,
-};
-
-static struct miscdevice cpu5wdt_misc = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &cpu5wdt_fops,
-};
-
-/* init/exit function */
-
-static int __devinit cpu5wdt_init(void)
-{
- unsigned int val;
- int err;
-
- if ( verbose )
- printk(KERN_DEBUG PFX "port=0x%x, verbose=%i\n", port, verbose);
-
- if ( !request_region(port, CPU5WDT_EXTENT, PFX) ) {
- printk(KERN_ERR PFX "request_region failed\n");
- err = -EBUSY;
- goto no_port;
- }
-
- if ( (err = misc_register(&cpu5wdt_misc)) < 0 ) {
- printk(KERN_ERR PFX "misc_register failed\n");
- goto no_misc;
- }
-
- /* watchdog reboot? */
- val = inb(port + CPU5WDT_STATUS_REG);
- val = (val >> 2) & 1;
- if ( !val )
- printk(KERN_INFO PFX "sorry, was my fault\n");
-
- init_completion(&cpu5wdt_device.stop);
- cpu5wdt_device.queue = 0;
-
- clear_bit(0, &cpu5wdt_device.inuse);
-
- setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
-
- cpu5wdt_device.default_ticks = ticks;
-
- printk(KERN_INFO PFX "init success\n");
-
- return 0;
-
-no_misc:
- release_region(port, CPU5WDT_EXTENT);
-no_port:
- return err;
-}
-
-static int __devinit cpu5wdt_init_module(void)
-{
- return cpu5wdt_init();
-}
-
-static void __devexit cpu5wdt_exit(void)
-{
- if ( cpu5wdt_device.queue ) {
- cpu5wdt_device.queue = 0;
- wait_for_completion(&cpu5wdt_device.stop);
- }
-
- misc_deregister(&cpu5wdt_misc);
-
- release_region(port, CPU5WDT_EXTENT);
-
-}
-
-static void __devexit cpu5wdt_exit_module(void)
-{
- cpu5wdt_exit();
-}
-
-/* module entry points */
-
-module_init(cpu5wdt_init_module);
-module_exit(cpu5wdt_exit_module);
-
-MODULE_AUTHOR("Heiko Ronsdorf <hero@ihg.uni-duisburg.de>");
-MODULE_DESCRIPTION("sma cpu5 watchdog driver");
-MODULE_SUPPORTED_DEVICE("sma cpu5 watchdog");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(port, int, 0);
-MODULE_PARM_DESC(port, "base address of watchdog card, default is 0x91");
-
-module_param(verbose, int, 0);
-MODULE_PARM_DESC(verbose, "be verbose, default is 0 (no)");
-
-module_param(ticks, int, 0);
-MODULE_PARM_DESC(ticks, "count down ticks, default is 10000");
+++ /dev/null
-/*
- * drivers/char/watchdog/davinci_wdt.c
- *
- * Watchdog driver for DaVinci DM644x/DM646x processors
- *
- * Copyright (C) 2006 Texas Instruments.
- *
- * 2007 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define MODULE_NAME "DAVINCI-WDT: "
-
-#define DEFAULT_HEARTBEAT 60
-#define MAX_HEARTBEAT 600 /* really the max margin is 264/27MHz*/
-
-/* Timer register set definition */
-#define PID12 (0x0)
-#define EMUMGT (0x4)
-#define TIM12 (0x10)
-#define TIM34 (0x14)
-#define PRD12 (0x18)
-#define PRD34 (0x1C)
-#define TCR (0x20)
-#define TGCR (0x24)
-#define WDTCR (0x28)
-
-/* TCR bit definitions */
-#define ENAMODE12_DISABLED (0 << 6)
-#define ENAMODE12_ONESHOT (1 << 6)
-#define ENAMODE12_PERIODIC (2 << 6)
-
-/* TGCR bit definitions */
-#define TIM12RS_UNRESET (1 << 0)
-#define TIM34RS_UNRESET (1 << 1)
-#define TIMMODE_64BIT_WDOG (2 << 2)
-
-/* WDTCR bit definitions */
-#define WDEN (1 << 14)
-#define WDFLAG (1 << 15)
-#define WDKEY_SEQ0 (0xa5c6 << 16)
-#define WDKEY_SEQ1 (0xda7e << 16)
-
-static int heartbeat = DEFAULT_HEARTBEAT;
-
-static spinlock_t io_lock;
-static unsigned long wdt_status;
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-#define WDT_REGION_INITED 2
-#define WDT_DEVICE_INITED 3
-
-static struct resource *wdt_mem;
-static void __iomem *wdt_base;
-
-static void wdt_service(void)
-{
- spin_lock(&io_lock);
-
- /* put watchdog in service state */
- davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
- /* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
-
- spin_unlock(&io_lock);
-}
-
-static void wdt_enable(void)
-{
- u32 tgcr;
- u32 timer_margin;
-
- spin_lock(&io_lock);
-
- /* disable, internal clock source */
- davinci_writel(0, wdt_base + TCR);
- /* reset timer, set mode to 64-bit watchdog, and unreset */
- davinci_writel(0, wdt_base + TGCR);
- tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
- davinci_writel(tgcr, wdt_base + TGCR);
- /* clear counter regs */
- davinci_writel(0, wdt_base + TIM12);
- davinci_writel(0, wdt_base + TIM34);
- /* set timeout period */
- timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
- davinci_writel(timer_margin, wdt_base + PRD12);
- timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
- davinci_writel(timer_margin, wdt_base + PRD34);
- /* enable run continuously */
- davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
- /* Once the WDT is in pre-active state write to
- * TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
- * write protected (except for the WDKEY field)
- */
- /* put watchdog in pre-active state */
- davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
- /* put watchdog in active state */
- davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
-
- spin_unlock(&io_lock);
-}
-
-static int davinci_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-davinci_wdt_write(struct file *file, const char *data, size_t len,
- loff_t *ppos)
-{
- if (len)
- wdt_service();
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING,
- .identity = "DaVinci Watchdog",
-};
-
-static int
-davinci_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(heartbeat, (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_service();
- ret = 0;
- break;
- }
- return ret;
-}
-
-static int davinci_wdt_release(struct inode *inode, struct file *file)
-{
- wdt_service();
- clear_bit(WDT_IN_USE, &wdt_status);
-
- return 0;
-}
-
-static const struct file_operations davinci_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = davinci_wdt_write,
- .ioctl = davinci_wdt_ioctl,
- .open = davinci_wdt_open,
- .release = davinci_wdt_release,
-};
-
-static struct miscdevice davinci_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &davinci_wdt_fops,
-};
-
-static int davinci_wdt_probe(struct platform_device *pdev)
-{
- int ret = 0, size;
- struct resource *res;
-
- spin_lock_init(&io_lock);
-
- if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT)
- heartbeat = DEFAULT_HEARTBEAT;
-
- printk(KERN_INFO MODULE_NAME
- "DaVinci Watchdog Timer: heartbeat %d sec\n", heartbeat);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- printk(KERN_INFO MODULE_NAME
- "failed to get memory region resource\n");
- return -ENOENT;
- }
-
- size = res->end - res->start + 1;
- wdt_mem = request_mem_region(res->start, size, pdev->name);
-
- if (wdt_mem == NULL) {
- printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
- return -ENOENT;
- }
- wdt_base = (void __iomem *)(res->start);
-
- ret = misc_register(&davinci_wdt_miscdev);
- if (ret < 0) {
- printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
- release_resource(wdt_mem);
- kfree(wdt_mem);
- } else {
- set_bit(WDT_DEVICE_INITED, &wdt_status);
- }
-
- return ret;
-}
-
-static int davinci_wdt_remove(struct platform_device *pdev)
-{
- misc_deregister(&davinci_wdt_miscdev);
- if (wdt_mem) {
- release_resource(wdt_mem);
- kfree(wdt_mem);
- wdt_mem = NULL;
- }
- return 0;
-}
-
-static struct platform_driver platform_wdt_driver = {
- .driver = {
- .name = "watchdog",
- },
- .probe = davinci_wdt_probe,
- .remove = davinci_wdt_remove,
-};
-
-static int __init davinci_wdt_init(void)
-{
- return platform_driver_register(&platform_wdt_driver);
-}
-
-static void __exit davinci_wdt_exit(void)
-{
- return platform_driver_unregister(&platform_wdt_driver);
-}
-
-module_init(davinci_wdt_init);
-module_exit(davinci_wdt_exit);
-
-MODULE_AUTHOR("Texas Instruments");
-MODULE_DESCRIPTION("DaVinci Watchdog Driver");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat,
- "Watchdog heartbeat period in seconds from 1 to "
- __MODULE_STRING(MAX_HEARTBEAT) ", default "
- __MODULE_STRING(DEFAULT_HEARTBEAT));
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog driver for Cirrus Logic EP93xx family of devices.
- *
- * Copyright (c) 2004 Ray Lehtiniemi
- * Copyright (c) 2006 Tower Technologies
- * Based on ep93xx driver, bits from alim7101_wdt.c
- *
- * Authors: Ray Lehtiniemi <rayl@mail.com>,
- * Alessandro Zummo <a.zummo@towertech.it>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- *
- * This watchdog fires after 250msec, which is a too short interval
- * for us to rely on the user space daemon alone. So we ping the
- * wdt each ~200msec and eventually stop doing it if the user space
- * daemon dies.
- *
- * TODO:
- *
- * - Test last reset from watchdog status
- * - Add a few missing ioctls
- */
-
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/timer.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-
-#define WDT_VERSION "0.3"
-#define PFX "ep93xx_wdt: "
-
-/* default timeout (secs) */
-#define WDT_TIMEOUT 30
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static int timeout = WDT_TIMEOUT;
-
-static struct timer_list timer;
-static unsigned long next_heartbeat;
-static unsigned long wdt_status;
-static unsigned long boot_status;
-
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-
-#define EP93XX_WDT_REG(x) (EP93XX_WATCHDOG_BASE + (x))
-#define EP93XX_WDT_WATCHDOG EP93XX_WDT_REG(0x00)
-#define EP93XX_WDT_WDSTATUS EP93XX_WDT_REG(0x04)
-
-/* reset the wdt every ~200ms */
-#define WDT_INTERVAL (HZ/5)
-
-static void wdt_enable(void)
-{
- __raw_writew(0xaaaa, EP93XX_WDT_WATCHDOG);
-}
-
-static void wdt_disable(void)
-{
- __raw_writew(0xaa55, EP93XX_WDT_WATCHDOG);
-}
-
-static inline void wdt_ping(void)
-{
- __raw_writew(0x5555, EP93XX_WDT_WATCHDOG);
-}
-
-static void wdt_startup(void)
-{
- next_heartbeat = jiffies + (timeout * HZ);
-
- wdt_enable();
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-}
-
-static void wdt_shutdown(void)
-{
- del_timer_sync(&timer);
- wdt_disable();
-}
-
-static void wdt_keepalive(void)
-{
- /* user land ping */
- next_heartbeat = jiffies + (timeout * HZ);
-}
-
-static int ep93xx_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- wdt_startup();
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-ep93xx_wdt_write(struct file *file, const char __user *data, size_t len,
- loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
-
- if (c == 'V')
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- else
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
- }
- }
- wdt_keepalive();
- }
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE,
- .identity = "EP93xx Watchdog",
-};
-
-static int
-ep93xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info __user *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, (int __user *)arg);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int __user *)arg);
- break;
-
- case WDIOC_GETTIMEOUT:
- /* actually, it is 0.250 seconds.... */
- ret = put_user(1, (int __user *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- ret = 0;
- break;
- }
- return ret;
-}
-
-static int ep93xx_wdt_release(struct inode *inode, struct file *file)
-{
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
- wdt_shutdown();
- else
- printk(KERN_CRIT PFX "Device closed unexpectedly - "
- "timer will not stop\n");
-
- clear_bit(WDT_IN_USE, &wdt_status);
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- return 0;
-}
-
-static const struct file_operations ep93xx_wdt_fops = {
- .owner = THIS_MODULE,
- .write = ep93xx_wdt_write,
- .ioctl = ep93xx_wdt_ioctl,
- .open = ep93xx_wdt_open,
- .release = ep93xx_wdt_release,
-};
-
-static struct miscdevice ep93xx_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ep93xx_wdt_fops,
-};
-
-static void ep93xx_timer_ping(unsigned long data)
-{
- if (time_before(jiffies, next_heartbeat))
- wdt_ping();
-
- /* Re-set the timer interval */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-}
-
-static int __init ep93xx_wdt_init(void)
-{
- int err;
-
- err = misc_register(&ep93xx_wdt_miscdev);
-
- boot_status = __raw_readl(EP93XX_WDT_WATCHDOG) & 0x01 ? 1 : 0;
-
- printk(KERN_INFO PFX "EP93XX watchdog, driver version "
- WDT_VERSION "%s\n",
- (__raw_readl(EP93XX_WDT_WATCHDOG) & 0x08)
- ? " (nCS1 disable detected)" : "");
-
- if (timeout < 1 || timeout > 3600) {
- timeout = WDT_TIMEOUT;
- printk(KERN_INFO PFX
- "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
- }
-
- setup_timer(&timer, ep93xx_timer_ping, 1);
- return err;
-}
-
-static void __exit ep93xx_wdt_exit(void)
-{
- wdt_shutdown();
- misc_deregister(&ep93xx_wdt_miscdev);
-}
-
-module_init(ep93xx_wdt_init);
-module_exit(ep93xx_wdt_exit);
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-MODULE_AUTHOR("Ray Lehtiniemi <rayl@mail.com>,"
- "Alessandro Zummo <a.zummo@towertech.it>");
-MODULE_DESCRIPTION("EP93xx Watchdog");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(WDT_VERSION);
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Eurotech CPU-1220/1410/1420 on board WDT driver
- *
- * (c) Copyright 2001 Ascensit <support@ascensit.com>
- * (c) Copyright 2001 Rodolfo Giometti <giometti@ascensit.com>
- * (c) Copyright 2002 Rob Radez <rob@osinvestor.com>
- *
- * Based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>*
- */
-
-/* Changelog:
- *
- * 2001 - Rodolfo Giometti
- * Initial release
- *
- * 2002/04/25 - Rob Radez
- * clean up #includes
- * clean up locking
- * make __setup param unique
- * proper options in watchdog_info
- * add WDIOC_GETSTATUS and WDIOC_SETOPTIONS ioctls
- * add expect_close support
- *
- * 2002.05.30 - Joel Becker <joel.becker@oracle.com>
- * Added Matt Domsch's nowayout module option.
- */
-
-/*
- * The eurotech CPU-1220/1410/1420's watchdog is a part
- * of the on-board SUPER I/O device SMSC FDC 37B782.
- */
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static unsigned long eurwdt_is_open;
-static int eurwdt_timeout;
-static char eur_expect_close;
-
-/*
- * You must set these - there is no sane way to probe for this board.
- * You can use eurwdt=x,y to set these now.
- */
-
-static int io = 0x3f0;
-static int irq = 10;
-static char *ev = "int";
-
-#define WDT_TIMEOUT 60 /* 1 minute */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Some symbolic names
- */
-
-#define WDT_CTRL_REG 0x30
-#define WDT_OUTPIN_CFG 0xe2
-#define WDT_EVENT_INT 0x00
-#define WDT_EVENT_REBOOT 0x08
-#define WDT_UNIT_SEL 0xf1
-#define WDT_UNIT_SECS 0x80
-#define WDT_TIMEOUT_VAL 0xf2
-#define WDT_TIMER_CFG 0xf3
-
-
-module_param(io, int, 0);
-MODULE_PARM_DESC(io, "Eurotech WDT io port (default=0x3f0)");
-module_param(irq, int, 0);
-MODULE_PARM_DESC(irq, "Eurotech WDT irq (default=10)");
-module_param(ev, charp, 0);
-MODULE_PARM_DESC(ev, "Eurotech WDT event type (default is `int')");
-
-
-/*
- * Programming support
- */
-
-static inline void eurwdt_write_reg(u8 index, u8 data)
-{
- outb(index, io);
- outb(data, io+1);
-}
-
-static inline void eurwdt_lock_chip(void)
-{
- outb(0xaa, io);
-}
-
-static inline void eurwdt_unlock_chip(void)
-{
- outb(0x55, io);
- eurwdt_write_reg(0x07, 0x08); /* set the logical device */
-}
-
-static inline void eurwdt_set_timeout(int timeout)
-{
- eurwdt_write_reg(WDT_TIMEOUT_VAL, (u8) timeout);
-}
-
-static inline void eurwdt_disable_timer(void)
-{
- eurwdt_set_timeout(0);
-}
-
-static void eurwdt_activate_timer(void)
-{
- eurwdt_disable_timer();
- eurwdt_write_reg(WDT_CTRL_REG, 0x01); /* activate the WDT */
- eurwdt_write_reg(WDT_OUTPIN_CFG, !strcmp("int", ev) ? WDT_EVENT_INT : WDT_EVENT_REBOOT);
-
- /* Setting interrupt line */
- if (irq == 2 || irq > 15 || irq < 0) {
- printk(KERN_ERR ": invalid irq number\n");
- irq = 0; /* if invalid we disable interrupt */
- }
- if (irq == 0)
- printk(KERN_INFO ": interrupt disabled\n");
-
- eurwdt_write_reg(WDT_TIMER_CFG, irq<<4);
-
- eurwdt_write_reg(WDT_UNIT_SEL, WDT_UNIT_SECS); /* we use seconds */
- eurwdt_set_timeout(0); /* the default timeout */
-}
-
-
-/*
- * Kernel methods.
- */
-
-static irqreturn_t eurwdt_interrupt(int irq, void *dev_id)
-{
- printk(KERN_CRIT "timeout WDT timeout\n");
-
-#ifdef ONLY_TESTING
- printk(KERN_CRIT "Would Reboot.\n");
-#else
- printk(KERN_CRIT "Initiating system reboot.\n");
- emergency_restart();
-#endif
- return IRQ_HANDLED;
-}
-
-
-/**
- * eurwdt_ping:
- *
- * Reload counter one with the watchdog timeout.
- */
-
-static void eurwdt_ping(void)
-{
- /* Write the watchdog default value */
- eurwdt_set_timeout(eurwdt_timeout);
-}
-
-/**
- * eurwdt_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t eurwdt_write(struct file *file, const char __user *buf,
-size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- eur_expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if(get_user(c, buf+i))
- return -EFAULT;
- if (c == 'V')
- eur_expect_close = 42;
- }
- }
- eurwdt_ping(); /* the default timeout */
- }
-
- return count;
-}
-
-/**
- * eurwdt_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features.
- */
-
-static int eurwdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "WDT Eurotech CPU-1220/1410",
- };
-
- int time;
- int options, retval = -EINVAL;
-
- switch(cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- eurwdt_ping();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (copy_from_user(&time, p, sizeof(int)))
- return -EFAULT;
-
- /* Sanity check */
- if (time < 0 || time > 255)
- return -EINVAL;
-
- eurwdt_timeout = time;
- eurwdt_set_timeout(time);
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(eurwdt_timeout, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(options, p))
- return -EFAULT;
- if (options & WDIOS_DISABLECARD) {
- eurwdt_disable_timer();
- retval = 0;
- }
- if (options & WDIOS_ENABLECARD) {
- eurwdt_activate_timer();
- eurwdt_ping();
- retval = 0;
- }
- return retval;
- }
-}
-
-/**
- * eurwdt_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The misc device has been opened. The watchdog device is single
- * open and on opening we load the counter.
- */
-
-static int eurwdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &eurwdt_is_open))
- return -EBUSY;
- eurwdt_timeout = WDT_TIMEOUT; /* initial timeout */
- /* Activate the WDT */
- eurwdt_activate_timer();
- return nonseekable_open(inode, file);
-}
-
-/**
- * eurwdt_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The watchdog has a configurable API. There is a religious dispute
- * between people who want their watchdog to be able to shut down and
- * those who want to be sure if the watchdog manager dies the machine
- * reboots. In the former case we disable the counters, in the latter
- * case you have to open it again very soon.
- */
-
-static int eurwdt_release(struct inode *inode, struct file *file)
-{
- if (eur_expect_close == 42) {
- eurwdt_disable_timer();
- } else {
- printk(KERN_CRIT "eurwdt: Unexpected close, not stopping watchdog!\n");
- eurwdt_ping();
- }
- clear_bit(0, &eurwdt_is_open);
- eur_expect_close = 0;
- return 0;
-}
-
-/**
- * eurwdt_notify_sys:
- * @this: our notifier block
- * @code: the event being reported
- * @unused: unused
- *
- * Our notifier is called on system shutdowns. We want to turn the card
- * off at reboot otherwise the machine will reboot again during memory
- * test or worse yet during the following fsck. This would suck, in fact
- * trust me - if it happens it does suck.
- */
-
-static int eurwdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the card off */
- eurwdt_disable_timer();
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-
-static const struct file_operations eurwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = eurwdt_write,
- .ioctl = eurwdt_ioctl,
- .open = eurwdt_open,
- .release = eurwdt_release,
-};
-
-static struct miscdevice eurwdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &eurwdt_fops,
-};
-
-/*
- * The WDT card needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block eurwdt_notifier = {
- .notifier_call = eurwdt_notify_sys,
-};
-
-/**
- * cleanup_module:
- *
- * Unload the watchdog. You cannot do this with any file handles open.
- * If your watchdog is set to continue ticking on close and you unload
- * it, well it keeps ticking. We won't get the interrupt but the board
- * will not touch PC memory so all is fine. You just have to load a new
- * module in 60 seconds or reboot.
- */
-
-static void __exit eurwdt_exit(void)
-{
- eurwdt_lock_chip();
-
- misc_deregister(&eurwdt_miscdev);
-
- unregister_reboot_notifier(&eurwdt_notifier);
- release_region(io, 2);
- free_irq(irq, NULL);
-}
-
-/**
- * eurwdt_init:
- *
- * Set up the WDT watchdog board. After grabbing the resources
- * we require we need also to unlock the device.
- * The open() function will actually kick the board off.
- */
-
-static int __init eurwdt_init(void)
-{
- int ret;
-
- ret = request_irq(irq, eurwdt_interrupt, IRQF_DISABLED, "eurwdt", NULL);
- if(ret) {
- printk(KERN_ERR "eurwdt: IRQ %d is not free.\n", irq);
- goto out;
- }
-
- if (!request_region(io, 2, "eurwdt")) {
- printk(KERN_ERR "eurwdt: IO %X is not free.\n", io);
- ret = -EBUSY;
- goto outirq;
- }
-
- ret = register_reboot_notifier(&eurwdt_notifier);
- if (ret) {
- printk(KERN_ERR "eurwdt: can't register reboot notifier (err=%d)\n", ret);
- goto outreg;
- }
-
- ret = misc_register(&eurwdt_miscdev);
- if (ret) {
- printk(KERN_ERR "eurwdt: can't misc_register on minor=%d\n",
- WATCHDOG_MINOR);
- goto outreboot;
- }
-
- eurwdt_unlock_chip();
-
- ret = 0;
- printk(KERN_INFO "Eurotech WDT driver 0.01 at %X (Interrupt %d)"
- " - timeout event: %s\n",
- io, irq, (!strcmp("int", ev) ? "int" : "reboot"));
-
-out:
- return ret;
-
-outreboot:
- unregister_reboot_notifier(&eurwdt_notifier);
-
-outreg:
- release_region(io, 2);
-
-outirq:
- free_irq(irq, NULL);
- goto out;
-}
-
-module_init(eurwdt_init);
-module_exit(eurwdt_exit);
-
-MODULE_AUTHOR("Rodolfo Giometti");
-MODULE_DESCRIPTION("Driver for Eurotech CPU-1220/1410 on board watchdog");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * i6300esb: Watchdog timer driver for Intel 6300ESB chipset
- *
- * (c) Copyright 2004 Google Inc.
- * (c) Copyright 2005 David Härdeman <david@2gen.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * based on i810-tco.c which is in turn based on softdog.c
- *
- * The timer is implemented in the following I/O controller hubs:
- * (See the intel documentation on http://developer.intel.com.)
- * 6300ESB chip : document number 300641-003
- *
- * 2004YYZZ Ross Biro
- * Initial version 0.01
- * 2004YYZZ Ross Biro
- * Version 0.02
- * 20050210 David Härdeman <david@2gen.com>
- * Ported driver to kernel 2.6
- */
-
-/*
- * Includes, defines, variables, module parameters, ...
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/ioport.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-/* Module and version information */
-#define ESB_VERSION "0.03"
-#define ESB_MODULE_NAME "i6300ESB timer"
-#define ESB_DRIVER_NAME ESB_MODULE_NAME ", v" ESB_VERSION
-#define PFX ESB_MODULE_NAME ": "
-
-/* PCI configuration registers */
-#define ESB_CONFIG_REG 0x60 /* Config register */
-#define ESB_LOCK_REG 0x68 /* WDT lock register */
-
-/* Memory mapped registers */
-#define ESB_TIMER1_REG BASEADDR + 0x00 /* Timer1 value after each reset */
-#define ESB_TIMER2_REG BASEADDR + 0x04 /* Timer2 value after each reset */
-#define ESB_GINTSR_REG BASEADDR + 0x08 /* General Interrupt Status Register */
-#define ESB_RELOAD_REG BASEADDR + 0x0c /* Reload register */
-
-/* Lock register bits */
-#define ESB_WDT_FUNC ( 0x01 << 2 ) /* Watchdog functionality */
-#define ESB_WDT_ENABLE ( 0x01 << 1 ) /* Enable WDT */
-#define ESB_WDT_LOCK ( 0x01 << 0 ) /* Lock (nowayout) */
-
-/* Config register bits */
-#define ESB_WDT_REBOOT ( 0x01 << 5 ) /* Enable reboot on timeout */
-#define ESB_WDT_FREQ ( 0x01 << 2 ) /* Decrement frequency */
-#define ESB_WDT_INTTYPE ( 0x11 << 0 ) /* Interrupt type on timer1 timeout */
-
-/* Reload register bits */
-#define ESB_WDT_RELOAD ( 0x01 << 8 ) /* prevent timeout */
-
-/* Magic constants */
-#define ESB_UNLOCK1 0x80 /* Step 1 to unlock reset registers */
-#define ESB_UNLOCK2 0x86 /* Step 2 to unlock reset registers */
-
-/* internal variables */
-static void __iomem *BASEADDR;
-static spinlock_t esb_lock; /* Guards the hardware */
-static unsigned long timer_alive;
-static struct pci_dev *esb_pci;
-static unsigned short triggered; /* The status of the watchdog upon boot */
-static char esb_expect_close;
-
-/* module parameters */
-#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat (1<heartbeat<2*1023) */
-static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<heartbeat<2046, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Some i6300ESB specific functions
- */
-
-/*
- * Prepare for reloading the timer by unlocking the proper registers.
- * This is performed by first writing 0x80 followed by 0x86 to the
- * reload register. After this the appropriate registers can be written
- * to once before they need to be unlocked again.
- */
-static inline void esb_unlock_registers(void) {
- writeb(ESB_UNLOCK1, ESB_RELOAD_REG);
- writeb(ESB_UNLOCK2, ESB_RELOAD_REG);
-}
-
-static void esb_timer_start(void)
-{
- u8 val;
-
- /* Enable or Enable + Lock? */
- val = 0x02 | (nowayout ? 0x01 : 0x00);
-
- pci_write_config_byte(esb_pci, ESB_LOCK_REG, val);
-}
-
-static int esb_timer_stop(void)
-{
- u8 val;
-
- spin_lock(&esb_lock);
- /* First, reset timers as suggested by the docs */
- esb_unlock_registers();
- writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
- /* Then disable the WDT */
- pci_write_config_byte(esb_pci, ESB_LOCK_REG, 0x0);
- pci_read_config_byte(esb_pci, ESB_LOCK_REG, &val);
- spin_unlock(&esb_lock);
-
- /* Returns 0 if the timer was disabled, non-zero otherwise */
- return (val & 0x01);
-}
-
-static void esb_timer_keepalive(void)
-{
- spin_lock(&esb_lock);
- esb_unlock_registers();
- writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
- /* FIXME: Do we need to flush anything here? */
- spin_unlock(&esb_lock);
-}
-
-static int esb_timer_set_heartbeat(int time)
-{
- u32 val;
-
- if (time < 0x1 || time > (2 * 0x03ff))
- return -EINVAL;
-
- spin_lock(&esb_lock);
-
- /* We shift by 9, so if we are passed a value of 1 sec,
- * val will be 1 << 9 = 512, then write that to two
- * timers => 2 * 512 = 1024 (which is decremented at 1KHz)
- */
- val = time << 9;
-
- /* Write timer 1 */
- esb_unlock_registers();
- writel(val, ESB_TIMER1_REG);
-
- /* Write timer 2 */
- esb_unlock_registers();
- writel(val, ESB_TIMER2_REG);
-
- /* Reload */
- esb_unlock_registers();
- writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
-
- /* FIXME: Do we need to flush everything out? */
-
- /* Done */
- heartbeat = time;
- spin_unlock(&esb_lock);
- return 0;
-}
-
-static int esb_timer_read (void)
-{
- u32 count;
-
- /* This isn't documented, and doesn't take into
- * acount which stage is running, but it looks
- * like a 20 bit count down, so we might as well report it.
- */
- pci_read_config_dword(esb_pci, 0x64, &count);
- return (int)count;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int esb_open (struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &timer_alive))
- return -EBUSY;
-
- /* Reload and activate timer */
- esb_timer_keepalive ();
- esb_timer_start ();
-
- return nonseekable_open(inode, file);
-}
-
-static int esb_release (struct inode *inode, struct file *file)
-{
- /* Shut off the timer. */
- if (esb_expect_close == 42) {
- esb_timer_stop ();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- esb_timer_keepalive ();
- }
- clear_bit(0, &timer_alive);
- esb_expect_close = 0;
- return 0;
-}
-
-static ssize_t esb_write (struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- esb_expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if(get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- esb_expect_close = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- esb_timer_keepalive ();
- }
- return len;
-}
-
-static int esb_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_options, retval = -EINVAL;
- int new_heartbeat;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = ESB_MODULE_NAME,
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user (esb_timer_read(), p);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user (triggered, p);
-
- case WDIOC_KEEPALIVE:
- esb_timer_keepalive ();
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- if (get_user (new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- esb_timer_stop ();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- esb_timer_keepalive ();
- esb_timer_start ();
- retval = 0;
- }
-
- return retval;
- }
-
- case WDIOC_SETTIMEOUT:
- {
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (esb_timer_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- esb_timer_keepalive ();
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Notify system
- */
-
-static int esb_notify_sys (struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- esb_timer_stop ();
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations esb_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = esb_write,
- .ioctl = esb_ioctl,
- .open = esb_open,
- .release = esb_release,
-};
-
-static struct miscdevice esb_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &esb_fops,
-};
-
-static struct notifier_block esb_notifier = {
- .notifier_call = esb_notify_sys,
-};
-
-/*
- * Data for PCI driver interface
- *
- * This data only exists for exporting the supported
- * PCI ids via MODULE_DEVICE_TABLE. We do not actually
- * register a pci_driver, because someone else might one day
- * want to register another driver on the same PCI id.
- */
-static struct pci_device_id esb_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_9), },
- { 0, }, /* End of list */
-};
-MODULE_DEVICE_TABLE (pci, esb_pci_tbl);
-
-/*
- * Init & exit routines
- */
-
-static unsigned char __init esb_getdevice (void)
-{
- u8 val1;
- unsigned short val2;
-
- struct pci_dev *dev = NULL;
- /*
- * Find the PCI device
- */
-
- for_each_pci_dev(dev) {
- if (pci_match_id(esb_pci_tbl, dev)) {
- esb_pci = dev;
- break;
- }
- }
-
- if (esb_pci) {
- if (pci_enable_device(esb_pci)) {
- printk (KERN_ERR PFX "failed to enable device\n");
- goto err_devput;
- }
-
- if (pci_request_region(esb_pci, 0, ESB_MODULE_NAME)) {
- printk (KERN_ERR PFX "failed to request region\n");
- goto err_disable;
- }
-
- BASEADDR = ioremap(pci_resource_start(esb_pci, 0),
- pci_resource_len(esb_pci, 0));
- if (BASEADDR == NULL) {
- /* Something's wrong here, BASEADDR has to be set */
- printk (KERN_ERR PFX "failed to get BASEADDR\n");
- goto err_release;
- }
-
- /*
- * The watchdog has two timers, it can be setup so that the
- * expiry of timer1 results in an interrupt and the expiry of
- * timer2 results in a reboot. We set it to not generate
- * any interrupts as there is not much we can do with it
- * right now.
- *
- * We also enable reboots and set the timer frequency to
- * the PCI clock divided by 2^15 (approx 1KHz).
- */
- pci_write_config_word(esb_pci, ESB_CONFIG_REG, 0x0003);
-
- /* Check that the WDT isn't already locked */
- pci_read_config_byte(esb_pci, ESB_LOCK_REG, &val1);
- if (val1 & ESB_WDT_LOCK)
- printk (KERN_WARNING PFX "nowayout already set\n");
-
- /* Set the timer to watchdog mode and disable it for now */
- pci_write_config_byte(esb_pci, ESB_LOCK_REG, 0x00);
-
- /* Check if the watchdog was previously triggered */
- esb_unlock_registers();
- val2 = readw(ESB_RELOAD_REG);
- triggered = (val2 & (0x01 << 9) >> 9);
-
- /* Reset trigger flag and timers */
- esb_unlock_registers();
- writew((0x11 << 8), ESB_RELOAD_REG);
-
- /* Done */
- return 1;
-
-err_release:
- pci_release_region(esb_pci, 0);
-err_disable:
- pci_disable_device(esb_pci);
-err_devput:
- pci_dev_put(esb_pci);
- }
- return 0;
-}
-
-static int __init watchdog_init (void)
-{
- int ret;
-
- spin_lock_init(&esb_lock);
-
- /* Check whether or not the hardware watchdog is there */
- if (!esb_getdevice () || esb_pci == NULL)
- return -ENODEV;
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (esb_timer_set_heartbeat (heartbeat)) {
- esb_timer_set_heartbeat (WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 1<heartbeat<2046, using %d\n",
- heartbeat);
- }
-
- ret = register_reboot_notifier(&esb_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto err_unmap;
- }
-
- ret = misc_register(&esb_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_notifier;
- }
-
- esb_timer_stop ();
-
- printk (KERN_INFO PFX "initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
- BASEADDR, heartbeat, nowayout);
-
- return 0;
-
-err_notifier:
- unregister_reboot_notifier(&esb_notifier);
-err_unmap:
- iounmap(BASEADDR);
-/* err_release: */
- pci_release_region(esb_pci, 0);
-/* err_disable: */
- pci_disable_device(esb_pci);
-/* err_devput: */
- pci_dev_put(esb_pci);
- return ret;
-}
-
-static void __exit watchdog_cleanup (void)
-{
- /* Stop the timer before we leave */
- if (!nowayout)
- esb_timer_stop ();
-
- /* Deregister */
- misc_deregister(&esb_miscdev);
- unregister_reboot_notifier(&esb_notifier);
- iounmap(BASEADDR);
- pci_release_region(esb_pci, 0);
- pci_disable_device(esb_pci);
- pci_dev_put(esb_pci);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_cleanup);
-
-MODULE_AUTHOR("Ross Biro and David Härdeman");
-MODULE_DESCRIPTION("Watchdog driver for Intel 6300ESB chipsets");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * intel TCO vendor specific watchdog driver support
- *
- * (c) Copyright 2006 Wim Van Sebroeck <wim@iguana.be>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
- * provide warranty for any of this software. This material is
- * provided "AS-IS" and at no charge.
- */
-
-/*
- * Includes, defines, variables, module parameters, ...
- */
-
-/* Module and version information */
-#define DRV_NAME "iTCO_vendor_support"
-#define DRV_VERSION "1.01"
-#define DRV_RELDATE "11-Nov-2006"
-#define PFX DRV_NAME ": "
-
-/* Includes */
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/init.h> /* For __init/__exit/... */
-#include <linux/ioport.h> /* For io-port access */
-
-#include <asm/io.h> /* For inb/outb/... */
-
-/* iTCO defines */
-#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */
-#define TCOBASE acpibase + 0x60 /* TCO base address */
-#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
-
-/* List of vendor support modes */
-#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
-#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
-
-static int vendorsupport = 0;
-module_param(vendorsupport, int, 0);
-MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+");
-
-/*
- * Vendor Specific Support
- */
-
-/*
- * Vendor Support: 1
- * Board: Super Micro Computer Inc. 370SSE+-OEM1/P3TSSE
- * iTCO chipset: ICH2
- *
- * Code contributed by: R. Seretny <lkpatches@paypc.com>
- * Documentation obtained by R. Seretny from SuperMicro Technical Support
- *
- * To enable Watchdog function:
- * BIOS setup -> Power -> TCO Logic SMI Enable -> Within5Minutes
- * This setting enables SMI to clear the watchdog expired flag.
- * If BIOS or CPU fail which may cause SMI hang, then system will
- * reboot. When application starts to use watchdog function,
- * application has to take over the control from SMI.
- *
- * For P3TSSE, J36 jumper needs to be removed to enable the Watchdog
- * function.
- *
- * Note: The system will reboot when Expire Flag is set TWICE.
- * So, if the watchdog timer is 20 seconds, then the maximum hang
- * time is about 40 seconds, and the minimum hang time is about
- * 20.6 seconds.
- */
-
-static void supermicro_old_pre_start(unsigned long acpibase)
-{
- unsigned long val32;
-
- val32 = inl(SMI_EN);
- val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
- outl(val32, SMI_EN); /* Needed to activate watchdog */
-}
-
-static void supermicro_old_pre_stop(unsigned long acpibase)
-{
- unsigned long val32;
-
- val32 = inl(SMI_EN);
- val32 &= 0x00002000; /* Turn on SMI clearing watchdog */
- outl(val32, SMI_EN); /* Needed to deactivate watchdog */
-}
-
-static void supermicro_old_pre_keepalive(unsigned long acpibase)
-{
- /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
- /* Clear "Expire Flag" (Bit 3 of TC01_STS register) */
- outb(0x08, TCO1_STS);
-}
-
-/*
- * Vendor Support: 2
- * Board: Super Micro Computer Inc. P4SBx, P4DPx
- * iTCO chipset: ICH4
- *
- * Code contributed by: R. Seretny <lkpatches@paypc.com>
- * Documentation obtained by R. Seretny from SuperMicro Technical Support
- *
- * To enable Watchdog function:
- * 1. BIOS
- * For P4SBx:
- * BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature
- * For P4DPx:
- * BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog
- * This setting enables or disables Watchdog function. When enabled, the
- * default watchdog timer is set to be 5 minutes (about 4’35”). It is
- * enough to load and run the OS. The application (service or driver) has
- * to take over the control once OS is running up and before watchdog
- * expires.
- *
- * 2. JUMPER
- * For P4SBx: JP39
- * For P4DPx: JP37
- * This jumper is used for safety. Closed is enabled. This jumper
- * prevents user enables watchdog in BIOS by accident.
- *
- * To enable Watch Dog function, both BIOS and JUMPER must be enabled.
- *
- * The documentation lists motherboards P4SBx and P4DPx series as of
- * 20-March-2002. However, this code works flawlessly with much newer
- * motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82).
- *
- * The original iTCO driver as written does not actually reset the
- * watchdog timer on these machines, as a result they reboot after five
- * minutes.
- *
- * NOTE: You may leave the Watchdog function disabled in the SuperMicro
- * BIOS to avoid a "boot-race"... This driver will enable watchdog
- * functionality even if it's disabled in the BIOS once the /dev/watchdog
- * file is opened.
- */
-
-/* I/O Port's */
-#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
-#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
-
-/* Control Register's */
-#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
-#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
-
-#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
-
-#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
-
-#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
-
-#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
- /* (Bit 3: 0 = seconds, 1 = minutes */
-
-#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
-
-#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
- /* Bit 6: timer is reset by kbd interrupt */
- /* Bit 7: timer is reset by mouse interrupt */
-
-static void supermicro_new_unlock_watchdog(void)
-{
- outb(SM_WATCHPAGE, SM_REGINDEX); /* Write 0x87 to port 0x2e twice */
- outb(SM_WATCHPAGE, SM_REGINDEX);
-
- outb(SM_CTLPAGESW, SM_REGINDEX); /* Switch to watchdog control page */
- outb(SM_CTLPAGE, SM_DATAIO);
-}
-
-static void supermicro_new_lock_watchdog(void)
-{
- outb(SM_ENDWATCH, SM_REGINDEX);
-}
-
-static void supermicro_new_pre_start(unsigned int heartbeat)
-{
- unsigned int val;
-
- supermicro_new_unlock_watchdog();
-
- /* Watchdog timer setting needs to be in seconds*/
- outb(SM_COUNTMODE, SM_REGINDEX);
- val = inb(SM_DATAIO);
- val &= 0xF7;
- outb(val, SM_DATAIO);
-
- /* Write heartbeat interval to WDOG */
- outb (SM_WATCHTIMER, SM_REGINDEX);
- outb((heartbeat & 255), SM_DATAIO);
-
- /* Make sure keyboard/mouse interrupts don't interfere */
- outb(SM_RESETCONTROL, SM_REGINDEX);
- val = inb(SM_DATAIO);
- val &= 0x3f;
- outb(val, SM_DATAIO);
-
- /* enable watchdog by setting bit 0 of Watchdog Enable to 1 */
- outb(SM_WATCHENABLE, SM_REGINDEX);
- val = inb(SM_DATAIO);
- val |= 0x01;
- outb(val, SM_DATAIO);
-
- supermicro_new_lock_watchdog();
-}
-
-static void supermicro_new_pre_stop(void)
-{
- unsigned int val;
-
- supermicro_new_unlock_watchdog();
-
- /* disable watchdog by setting bit 0 of Watchdog Enable to 0 */
- outb(SM_WATCHENABLE, SM_REGINDEX);
- val = inb(SM_DATAIO);
- val &= 0xFE;
- outb(val, SM_DATAIO);
-
- supermicro_new_lock_watchdog();
-}
-
-static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
-{
- supermicro_new_unlock_watchdog();
-
- /* reset watchdog timeout to heartveat value */
- outb(SM_WATCHTIMER, SM_REGINDEX);
- outb((heartbeat & 255), SM_DATAIO);
-
- supermicro_new_lock_watchdog();
-}
-
-/*
- * Generic Support Functions
- */
-
-void iTCO_vendor_pre_start(unsigned long acpibase,
- unsigned int heartbeat)
-{
- if (vendorsupport == SUPERMICRO_OLD_BOARD)
- supermicro_old_pre_start(acpibase);
- else if (vendorsupport == SUPERMICRO_NEW_BOARD)
- supermicro_new_pre_start(heartbeat);
-}
-EXPORT_SYMBOL(iTCO_vendor_pre_start);
-
-void iTCO_vendor_pre_stop(unsigned long acpibase)
-{
- if (vendorsupport == SUPERMICRO_OLD_BOARD)
- supermicro_old_pre_stop(acpibase);
- else if (vendorsupport == SUPERMICRO_NEW_BOARD)
- supermicro_new_pre_stop();
-}
-EXPORT_SYMBOL(iTCO_vendor_pre_stop);
-
-void iTCO_vendor_pre_keepalive(unsigned long acpibase, unsigned int heartbeat)
-{
- if (vendorsupport == SUPERMICRO_OLD_BOARD)
- supermicro_old_pre_keepalive(acpibase);
- else if (vendorsupport == SUPERMICRO_NEW_BOARD)
- supermicro_new_pre_set_heartbeat(heartbeat);
-}
-EXPORT_SYMBOL(iTCO_vendor_pre_keepalive);
-
-void iTCO_vendor_pre_set_heartbeat(unsigned int heartbeat)
-{
- if (vendorsupport == SUPERMICRO_NEW_BOARD)
- supermicro_new_pre_set_heartbeat(heartbeat);
-}
-EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
-
-int iTCO_vendor_check_noreboot_on(void)
-{
- switch(vendorsupport) {
- case SUPERMICRO_OLD_BOARD:
- return 0;
- default:
- return 1;
- }
-}
-EXPORT_SYMBOL(iTCO_vendor_check_noreboot_on);
-
-static int __init iTCO_vendor_init_module(void)
-{
- printk (KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
- return 0;
-}
-
-static void __exit iTCO_vendor_exit_module(void)
-{
- printk (KERN_INFO PFX "Module Unloaded\n");
-}
-
-module_init(iTCO_vendor_init_module);
-module_exit(iTCO_vendor_exit_module);
-
-MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, R. Seretny <lkpatches@paypc.com>");
-MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
-MODULE_VERSION(DRV_VERSION);
-MODULE_LICENSE("GPL");
-
+++ /dev/null
-/*
- * intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets)
- *
- * (c) Copyright 2006-2007 Wim Van Sebroeck <wim@iguana.be>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
- * provide warranty for any of this software. This material is
- * provided "AS-IS" and at no charge.
- *
- * The TCO watchdog is implemented in the following I/O controller hubs:
- * (See the intel documentation on http://developer.intel.com.)
- * 82801AA (ICH) : document number 290655-003, 290677-014,
- * 82801AB (ICHO) : document number 290655-003, 290677-014,
- * 82801BA (ICH2) : document number 290687-002, 298242-027,
- * 82801BAM (ICH2-M) : document number 290687-002, 298242-027,
- * 82801CA (ICH3-S) : document number 290733-003, 290739-013,
- * 82801CAM (ICH3-M) : document number 290716-001, 290718-007,
- * 82801DB (ICH4) : document number 290744-001, 290745-020,
- * 82801DBM (ICH4-M) : document number 252337-001, 252663-005,
- * 82801E (C-ICH) : document number 273599-001, 273645-002,
- * 82801EB (ICH5) : document number 252516-001, 252517-003,
- * 82801ER (ICH5R) : document number 252516-001, 252517-003,
- * 82801FB (ICH6) : document number 301473-002, 301474-007,
- * 82801FR (ICH6R) : document number 301473-002, 301474-007,
- * 82801FBM (ICH6-M) : document number 301473-002, 301474-007,
- * 82801FW (ICH6W) : document number 301473-001, 301474-007,
- * 82801FRW (ICH6RW) : document number 301473-001, 301474-007,
- * 82801GB (ICH7) : document number 307013-002, 307014-009,
- * 82801GR (ICH7R) : document number 307013-002, 307014-009,
- * 82801GDH (ICH7DH) : document number 307013-002, 307014-009,
- * 82801GBM (ICH7-M) : document number 307013-002, 307014-009,
- * 82801GHM (ICH7-M DH) : document number 307013-002, 307014-009,
- * 82801HB (ICH8) : document number 313056-002, 313057-004,
- * 82801HR (ICH8R) : document number 313056-002, 313057-004,
- * 82801HH (ICH8DH) : document number 313056-002, 313057-004,
- * 82801HO (ICH8DO) : document number 313056-002, 313057-004,
- * 82801IB (ICH9) : document number 316972-001, 316973-001,
- * 82801IR (ICH9R) : document number 316972-001, 316973-001,
- * 82801IH (ICH9DH) : document number 316972-001, 316973-001,
- * 6300ESB (6300ESB) : document number 300641-003, 300884-010,
- * 631xESB (631xESB) : document number 313082-001, 313075-005,
- * 632xESB (632xESB) : document number 313082-001, 313075-005
- */
-
-/*
- * Includes, defines, variables, module parameters, ...
- */
-
-/* Module and version information */
-#define DRV_NAME "iTCO_wdt"
-#define DRV_VERSION "1.02"
-#define DRV_RELDATE "26-Jul-2007"
-#define PFX DRV_NAME ": "
-
-/* Includes */
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
-#include <linux/watchdog.h> /* For the watchdog specific items */
-#include <linux/init.h> /* For __init/__exit/... */
-#include <linux/fs.h> /* For file operations */
-#include <linux/platform_device.h> /* For platform_driver framework */
-#include <linux/pci.h> /* For pci functions */
-#include <linux/ioport.h> /* For io-port access */
-#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
-
-/* TCO related info */
-enum iTCO_chipsets {
- TCO_ICH = 0, /* ICH */
- TCO_ICH0, /* ICH0 */
- TCO_ICH2, /* ICH2 */
- TCO_ICH2M, /* ICH2-M */
- TCO_ICH3, /* ICH3-S */
- TCO_ICH3M, /* ICH3-M */
- TCO_ICH4, /* ICH4 */
- TCO_ICH4M, /* ICH4-M */
- TCO_CICH, /* C-ICH */
- TCO_ICH5, /* ICH5 & ICH5R */
- TCO_6300ESB, /* 6300ESB */
- TCO_ICH6, /* ICH6 & ICH6R */
- TCO_ICH6M, /* ICH6-M */
- TCO_ICH6W, /* ICH6W & ICH6RW */
- TCO_ICH7, /* ICH7 & ICH7R */
- TCO_ICH7M, /* ICH7-M */
- TCO_ICH7MDH, /* ICH7-M DH */
- TCO_ICH8, /* ICH8 & ICH8R */
- TCO_ICH8DH, /* ICH8DH */
- TCO_ICH8DO, /* ICH8DO */
- TCO_ICH9, /* ICH9 */
- TCO_ICH9R, /* ICH9R */
- TCO_ICH9DH, /* ICH9DH */
- TCO_631XESB, /* 631xESB/632xESB */
-};
-
-static struct {
- char *name;
- unsigned int iTCO_version;
-} iTCO_chipset_info[] __devinitdata = {
- {"ICH", 1},
- {"ICH0", 1},
- {"ICH2", 1},
- {"ICH2-M", 1},
- {"ICH3-S", 1},
- {"ICH3-M", 1},
- {"ICH4", 1},
- {"ICH4-M", 1},
- {"C-ICH", 1},
- {"ICH5 or ICH5R", 1},
- {"6300ESB", 1},
- {"ICH6 or ICH6R", 2},
- {"ICH6-M", 2},
- {"ICH6W or ICH6RW", 2},
- {"ICH7 or ICH7R", 2},
- {"ICH7-M", 2},
- {"ICH7-M DH", 2},
- {"ICH8 or ICH8R", 2},
- {"ICH8DH", 2},
- {"ICH8DO", 2},
- {"ICH9", 2},
- {"ICH9R", 2},
- {"ICH9DH", 2},
- {"631xESB/632xESB", 2},
- {NULL,0}
-};
-
-/*
- * This data only exists for exporting the supported PCI ids
- * via MODULE_DEVICE_TABLE. We do not actually register a
- * pci_driver, because the I/O Controller Hub has also other
- * functions that probably will be registered by other drivers.
- */
-static struct pci_device_id iTCO_wdt_pci_tbl[] = {
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH0 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2M },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3M },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4M },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801E_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_CICH },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH5 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_6300ESB },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6M },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6W },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7M },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7MDH },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8 },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DH },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DO },
- { PCI_VENDOR_ID_INTEL, 0x2918, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9 },
- { PCI_VENDOR_ID_INTEL, 0x2916, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9R },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9DH },
- { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2671, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2672, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2673, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2674, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2675, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2676, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2677, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2678, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x2679, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { PCI_VENDOR_ID_INTEL, 0x267f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
- { 0, }, /* End of list */
-};
-MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
-
-/* Address definitions for the TCO */
-#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60 /* TCO base address */
-#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30 /* SMI Control and Enable Register */
-
-#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Current Value */
-#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */
-#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
-#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
-#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
-#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */
-#define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */
-#define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */
-#define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */
-
-/* internal variables */
-static unsigned long is_active;
-static char expect_release;
-static struct { /* this is private data for the iTCO_wdt device */
- unsigned int iTCO_version; /* TCO version/generation */
- unsigned long ACPIBASE; /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
- unsigned long __iomem *gcs; /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2) */
- spinlock_t io_lock; /* the lock for io operations */
- struct pci_dev *pdev; /* the PCI-device */
-} iTCO_wdt_private;
-
-static struct platform_device *iTCO_wdt_platform_device; /* the watchdog platform device */
-
-/* module parameters */
-#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
-static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/* iTCO Vendor Specific Support hooks */
-#ifdef CONFIG_ITCO_VENDOR_SUPPORT
-extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
-extern void iTCO_vendor_pre_stop(unsigned long);
-extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
-extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
-extern int iTCO_vendor_check_noreboot_on(void);
-#else
-#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
-#define iTCO_vendor_pre_stop(acpibase) {}
-#define iTCO_vendor_pre_keepalive(acpibase,heartbeat) {}
-#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
-#define iTCO_vendor_check_noreboot_on() 1 /* 1=check noreboot; 0=don't check */
-#endif
-
-/*
- * Some TCO specific functions
- */
-
-static inline unsigned int seconds_to_ticks(int seconds)
-{
- /* the internal timer is stored as ticks which decrement
- * every 0.6 seconds */
- return (seconds * 10) / 6;
-}
-
-static void iTCO_wdt_set_NO_REBOOT_bit(void)
-{
- u32 val32;
-
- /* Set the NO_REBOOT bit: this disables reboots */
- if (iTCO_wdt_private.iTCO_version == 2) {
- val32 = readl(iTCO_wdt_private.gcs);
- val32 |= 0x00000020;
- writel(val32, iTCO_wdt_private.gcs);
- } else if (iTCO_wdt_private.iTCO_version == 1) {
- pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
- val32 |= 0x00000002;
- pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32);
- }
-}
-
-static int iTCO_wdt_unset_NO_REBOOT_bit(void)
-{
- int ret = 0;
- u32 val32;
-
- /* Unset the NO_REBOOT bit: this enables reboots */
- if (iTCO_wdt_private.iTCO_version == 2) {
- val32 = readl(iTCO_wdt_private.gcs);
- val32 &= 0xffffffdf;
- writel(val32, iTCO_wdt_private.gcs);
-
- val32 = readl(iTCO_wdt_private.gcs);
- if (val32 & 0x00000020)
- ret = -EIO;
- } else if (iTCO_wdt_private.iTCO_version == 1) {
- pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
- val32 &= 0xfffffffd;
- pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32);
-
- pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
- if (val32 & 0x00000002)
- ret = -EIO;
- }
-
- return ret; /* returns: 0 = OK, -EIO = Error */
-}
-
-static int iTCO_wdt_start(void)
-{
- unsigned int val;
-
- spin_lock(&iTCO_wdt_private.io_lock);
-
- iTCO_vendor_pre_start(iTCO_wdt_private.ACPIBASE, heartbeat);
-
- /* disable chipset's NO_REBOOT bit */
- if (iTCO_wdt_unset_NO_REBOOT_bit()) {
- printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
- return -EIO;
- }
-
- /* Bit 11: TCO Timer Halt -> 0 = The TCO timer is enabled to count */
- val = inw(TCO1_CNT);
- val &= 0xf7ff;
- outw(val, TCO1_CNT);
- val = inw(TCO1_CNT);
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- if (val & 0x0800)
- return -1;
- return 0;
-}
-
-static int iTCO_wdt_stop(void)
-{
- unsigned int val;
-
- spin_lock(&iTCO_wdt_private.io_lock);
-
- iTCO_vendor_pre_stop(iTCO_wdt_private.ACPIBASE);
-
- /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
- val = inw(TCO1_CNT);
- val |= 0x0800;
- outw(val, TCO1_CNT);
- val = inw(TCO1_CNT);
-
- /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
- iTCO_wdt_set_NO_REBOOT_bit();
-
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- if ((val & 0x0800) == 0)
- return -1;
- return 0;
-}
-
-static int iTCO_wdt_keepalive(void)
-{
- spin_lock(&iTCO_wdt_private.io_lock);
-
- iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat);
-
- /* Reload the timer by writing to the TCO Timer Counter register */
- if (iTCO_wdt_private.iTCO_version == 2) {
- outw(0x01, TCO_RLD);
- } else if (iTCO_wdt_private.iTCO_version == 1) {
- outb(0x01, TCO_RLD);
- }
-
- spin_unlock(&iTCO_wdt_private.io_lock);
- return 0;
-}
-
-static int iTCO_wdt_set_heartbeat(int t)
-{
- unsigned int val16;
- unsigned char val8;
- unsigned int tmrval;
-
- tmrval = seconds_to_ticks(t);
- /* from the specs: */
- /* "Values of 0h-3h are ignored and should not be attempted" */
- if (tmrval < 0x04)
- return -EINVAL;
- if (((iTCO_wdt_private.iTCO_version == 2) && (tmrval > 0x3ff)) ||
- ((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f)))
- return -EINVAL;
-
- iTCO_vendor_pre_set_heartbeat(tmrval);
-
- /* Write new heartbeat to watchdog */
- if (iTCO_wdt_private.iTCO_version == 2) {
- spin_lock(&iTCO_wdt_private.io_lock);
- val16 = inw(TCOv2_TMR);
- val16 &= 0xfc00;
- val16 |= tmrval;
- outw(val16, TCOv2_TMR);
- val16 = inw(TCOv2_TMR);
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- if ((val16 & 0x3ff) != tmrval)
- return -EINVAL;
- } else if (iTCO_wdt_private.iTCO_version == 1) {
- spin_lock(&iTCO_wdt_private.io_lock);
- val8 = inb(TCOv1_TMR);
- val8 &= 0xc0;
- val8 |= (tmrval & 0xff);
- outb(val8, TCOv1_TMR);
- val8 = inb(TCOv1_TMR);
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- if ((val8 & 0x3f) != tmrval)
- return -EINVAL;
- }
-
- heartbeat = t;
- return 0;
-}
-
-static int iTCO_wdt_get_timeleft (int *time_left)
-{
- unsigned int val16;
- unsigned char val8;
-
- /* read the TCO Timer */
- if (iTCO_wdt_private.iTCO_version == 2) {
- spin_lock(&iTCO_wdt_private.io_lock);
- val16 = inw(TCO_RLD);
- val16 &= 0x3ff;
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- *time_left = (val16 * 6) / 10;
- } else if (iTCO_wdt_private.iTCO_version == 1) {
- spin_lock(&iTCO_wdt_private.io_lock);
- val8 = inb(TCO_RLD);
- val8 &= 0x3f;
- spin_unlock(&iTCO_wdt_private.io_lock);
-
- *time_left = (val8 * 6) / 10;
- } else
- return -EINVAL;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int iTCO_wdt_open (struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &is_active))
- return -EBUSY;
-
- /*
- * Reload and activate timer
- */
- iTCO_wdt_keepalive();
- iTCO_wdt_start();
- return nonseekable_open(inode, file);
-}
-
-static int iTCO_wdt_release (struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- */
- if (expect_release == 42) {
- iTCO_wdt_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- iTCO_wdt_keepalive();
- }
- clear_bit(0, &is_active);
- expect_release = 0;
- return 0;
-}
-
-static ssize_t iTCO_wdt_write (struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- expect_release = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_release = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- iTCO_wdt_keepalive();
- }
- return len;
-}
-
-static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_options, retval = -EINVAL;
- int new_heartbeat;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = DRV_NAME,
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- iTCO_wdt_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- if (get_user(new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- iTCO_wdt_stop();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- iTCO_wdt_keepalive();
- iTCO_wdt_start();
- retval = 0;
- }
-
- return retval;
- }
-
- case WDIOC_SETTIMEOUT:
- {
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (iTCO_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- iTCO_wdt_keepalive();
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
-
- case WDIOC_GETTIMELEFT:
- {
- int time_left;
-
- if (iTCO_wdt_get_timeleft(&time_left))
- return -EINVAL;
-
- return put_user(time_left, p);
- }
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations iTCO_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = iTCO_wdt_write,
- .ioctl = iTCO_wdt_ioctl,
- .open = iTCO_wdt_open,
- .release = iTCO_wdt_release,
-};
-
-static struct miscdevice iTCO_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &iTCO_wdt_fops,
-};
-
-/*
- * Init & exit routines
- */
-
-static int iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device_id *ent, struct platform_device *dev)
-{
- int ret;
- u32 base_address;
- unsigned long RCBA;
- unsigned long val32;
-
- /*
- * Find the ACPI/PM base I/O address which is the base
- * for the TCO registers (TCOBASE=ACPIBASE + 0x60)
- * ACPIBASE is bits [15:7] from 0x40-0x43
- */
- pci_read_config_dword(pdev, 0x40, &base_address);
- base_address &= 0x0000ff80;
- if (base_address == 0x00000000) {
- /* Something's wrong here, ACPIBASE has to be set */
- printk(KERN_ERR PFX "failed to get TCOBASE address\n");
- pci_dev_put(pdev);
- return -ENODEV;
- }
- iTCO_wdt_private.iTCO_version = iTCO_chipset_info[ent->driver_data].iTCO_version;
- iTCO_wdt_private.ACPIBASE = base_address;
- iTCO_wdt_private.pdev = pdev;
-
- /* Get the Memory-Mapped GCS register, we need it for the NO_REBOOT flag (TCO v2) */
- /* To get access to it you have to read RCBA from PCI Config space 0xf0
- and use it as base. GCS = RCBA + ICH6_GCS(0x3410). */
- if (iTCO_wdt_private.iTCO_version == 2) {
- pci_read_config_dword(pdev, 0xf0, &base_address);
- RCBA = base_address & 0xffffc000;
- iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410),4);
- }
-
- /* Check chipset's NO_REBOOT bit */
- if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) {
- printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
- ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
- goto out;
- }
-
- /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
- iTCO_wdt_set_NO_REBOOT_bit();
-
- /* Set the TCO_EN bit in SMI_EN register */
- if (!request_region(SMI_EN, 4, "iTCO_wdt")) {
- printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n",
- SMI_EN );
- ret = -EIO;
- goto out;
- }
- val32 = inl(SMI_EN);
- val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
- outl(val32, SMI_EN);
- release_region(SMI_EN, 4);
-
- /* The TCO I/O registers reside in a 32-byte range pointed to by the TCOBASE value */
- if (!request_region (TCOBASE, 0x20, "iTCO_wdt")) {
- printk (KERN_ERR PFX "I/O address 0x%04lx already in use\n",
- TCOBASE);
- ret = -EIO;
- goto out;
- }
-
- printk(KERN_INFO PFX "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n",
- iTCO_chipset_info[ent->driver_data].name,
- iTCO_chipset_info[ent->driver_data].iTCO_version,
- TCOBASE);
-
- /* Clear out the (probably old) status */
- outb(0, TCO1_STS);
- outb(3, TCO2_STS);
-
- /* Make sure the watchdog is not running */
- iTCO_wdt_stop();
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (iTCO_wdt_set_heartbeat(heartbeat)) {
- iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 2<heartbeat<39 (TCO v1) or 613 (TCO v2), using %d\n",
- heartbeat);
- }
-
- ret = misc_register(&iTCO_wdt_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto unreg_region;
- }
-
- printk (KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
- return 0;
-
-unreg_region:
- release_region (TCOBASE, 0x20);
-out:
- if (iTCO_wdt_private.iTCO_version == 2)
- iounmap(iTCO_wdt_private.gcs);
- pci_dev_put(iTCO_wdt_private.pdev);
- iTCO_wdt_private.ACPIBASE = 0;
- return ret;
-}
-
-static void iTCO_wdt_cleanup(void)
-{
- /* Stop the timer before we leave */
- if (!nowayout)
- iTCO_wdt_stop();
-
- /* Deregister */
- misc_deregister(&iTCO_wdt_miscdev);
- release_region(TCOBASE, 0x20);
- if (iTCO_wdt_private.iTCO_version == 2)
- iounmap(iTCO_wdt_private.gcs);
- pci_dev_put(iTCO_wdt_private.pdev);
- iTCO_wdt_private.ACPIBASE = 0;
-}
-
-static int iTCO_wdt_probe(struct platform_device *dev)
-{
- int found = 0;
- struct pci_dev *pdev = NULL;
- const struct pci_device_id *ent;
-
- spin_lock_init(&iTCO_wdt_private.io_lock);
-
- for_each_pci_dev(pdev) {
- ent = pci_match_id(iTCO_wdt_pci_tbl, pdev);
- if (ent) {
- if (!(iTCO_wdt_init(pdev, ent, dev))) {
- found++;
- break;
- }
- }
- }
-
- if (!found) {
- printk(KERN_INFO PFX "No card detected\n");
- return -ENODEV;
- }
-
- return 0;
-}
-
-static int iTCO_wdt_remove(struct platform_device *dev)
-{
- if (iTCO_wdt_private.ACPIBASE)
- iTCO_wdt_cleanup();
-
- return 0;
-}
-
-static void iTCO_wdt_shutdown(struct platform_device *dev)
-{
- iTCO_wdt_stop();
-}
-
-#define iTCO_wdt_suspend NULL
-#define iTCO_wdt_resume NULL
-
-static struct platform_driver iTCO_wdt_driver = {
- .probe = iTCO_wdt_probe,
- .remove = iTCO_wdt_remove,
- .shutdown = iTCO_wdt_shutdown,
- .suspend = iTCO_wdt_suspend,
- .resume = iTCO_wdt_resume,
- .driver = {
- .owner = THIS_MODULE,
- .name = DRV_NAME,
- },
-};
-
-static int __init iTCO_wdt_init_module(void)
-{
- int err;
-
- printk(KERN_INFO PFX "Intel TCO WatchDog Timer Driver v%s (%s)\n",
- DRV_VERSION, DRV_RELDATE);
-
- err = platform_driver_register(&iTCO_wdt_driver);
- if (err)
- return err;
-
- iTCO_wdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
- if (IS_ERR(iTCO_wdt_platform_device)) {
- err = PTR_ERR(iTCO_wdt_platform_device);
- goto unreg_platform_driver;
- }
-
- return 0;
-
-unreg_platform_driver:
- platform_driver_unregister(&iTCO_wdt_driver);
- return err;
-}
-
-static void __exit iTCO_wdt_cleanup_module(void)
-{
- platform_device_unregister(iTCO_wdt_platform_device);
- platform_driver_unregister(&iTCO_wdt_driver);
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(iTCO_wdt_init_module);
-module_exit(iTCO_wdt_cleanup_module);
-
-MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
-MODULE_DESCRIPTION("Intel TCO WatchDog Timer Driver");
-MODULE_VERSION(DRV_VERSION);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * IB700 Single Board Computer WDT driver
- *
- * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
- *
- * Based on advantechwdt.c which is based on acquirewdt.c which
- * is based on wdt.c.
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * Based on acquirewdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@redhat.com>
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- * Added timeout module option to override default
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static struct platform_device *ibwdt_platform_device;
-static unsigned long ibwdt_is_open;
-static spinlock_t ibwdt_lock;
-static char expect_close;
-
-/* Module information */
-#define DRV_NAME "ib700wdt"
-#define PFX DRV_NAME ": "
-
-/*
- *
- * Watchdog Timer Configuration
- *
- * The function of the watchdog timer is to reset the system
- * automatically and is defined at I/O port 0443H. To enable the
- * watchdog timer and allow the system to reset, write I/O port 0443H.
- * To disable the timer, write I/O port 0441H for the system to stop the
- * watchdog function. The timer has a tolerance of 20% for its
- * intervals.
- *
- * The following describes how the timer should be programmed.
- *
- * Enabling Watchdog:
- * MOV AX,000FH (Choose the values from 0 to F)
- * MOV DX,0443H
- * OUT DX,AX
- *
- * Disabling Watchdog:
- * MOV AX,000FH (Any value is fine.)
- * MOV DX,0441H
- * OUT DX,AX
- *
- * Watchdog timer control table:
- * Level Value Time/sec | Level Value Time/sec
- * 1 F 0 | 9 7 16
- * 2 E 2 | 10 6 18
- * 3 D 4 | 11 5 20
- * 4 C 6 | 12 4 22
- * 5 B 8 | 13 3 24
- * 6 A 10 | 14 2 26
- * 7 9 12 | 15 1 28
- * 8 8 14 | 16 0 30
- *
- */
-
-static int wd_times[] = {
- 30, /* 0x0 */
- 28, /* 0x1 */
- 26, /* 0x2 */
- 24, /* 0x3 */
- 22, /* 0x4 */
- 20, /* 0x5 */
- 18, /* 0x6 */
- 16, /* 0x7 */
- 14, /* 0x8 */
- 12, /* 0x9 */
- 10, /* 0xA */
- 8, /* 0xB */
- 6, /* 0xC */
- 4, /* 0xD */
- 2, /* 0xE */
- 0, /* 0xF */
-};
-
-#define WDT_STOP 0x441
-#define WDT_START 0x443
-
-/* Default timeout */
-#define WD_TIMO 0 /* 30 seconds +/- 20%, from table */
-
-static int wd_margin = WD_TIMO;
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-
-/*
- * Watchdog Operations
- */
-
-static void
-ibwdt_ping(void)
-{
- spin_lock(&ibwdt_lock);
-
- /* Write a watchdog value */
- outb_p(wd_margin, WDT_START);
-
- spin_unlock(&ibwdt_lock);
-}
-
-static void
-ibwdt_disable(void)
-{
- spin_lock(&ibwdt_lock);
- outb_p(0, WDT_STOP);
- spin_unlock(&ibwdt_lock);
-}
-
-static int
-ibwdt_set_heartbeat(int t)
-{
- int i;
-
- if ((t < 0) || (t > 30))
- return -EINVAL;
-
- for (i = 0x0F; i > -1; i--)
- if (wd_times[i] > t)
- break;
- wd_margin = i;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t
-ibwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- ibwdt_ping();
- }
- return count;
-}
-
-static int
-ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int new_margin;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
-
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "IB700 WDT",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- ibwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
- if (ibwdt_set_heartbeat(new_margin))
- return -EINVAL;
- ibwdt_ping();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(wd_times[wd_margin], p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- ibwdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- ibwdt_ping();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int
-ibwdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &ibwdt_is_open)) {
- return -EBUSY;
- }
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate */
- ibwdt_ping();
- return nonseekable_open(inode, file);
-}
-
-static int
-ibwdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- ibwdt_disable();
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
- ibwdt_ping();
- }
- clear_bit(0, &ibwdt_is_open);
- expect_close = 0;
- return 0;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations ibwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ibwdt_write,
- .ioctl = ibwdt_ioctl,
- .open = ibwdt_open,
- .release = ibwdt_close,
-};
-
-static struct miscdevice ibwdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ibwdt_fops,
-};
-
-/*
- * Init & exit routines
- */
-
-static int __devinit ibwdt_probe(struct platform_device *dev)
-{
- int res;
-
- spin_lock_init(&ibwdt_lock);
-
-#if WDT_START != WDT_STOP
- if (!request_region(WDT_STOP, 1, "IB700 WDT")) {
- printk (KERN_ERR PFX "STOP method I/O %X is not available.\n", WDT_STOP);
- res = -EIO;
- goto out_nostopreg;
- }
-#endif
-
- if (!request_region(WDT_START, 1, "IB700 WDT")) {
- printk (KERN_ERR PFX "START method I/O %X is not available.\n", WDT_START);
- res = -EIO;
- goto out_nostartreg;
- }
-
- res = misc_register(&ibwdt_miscdev);
- if (res) {
- printk (KERN_ERR PFX "failed to register misc device\n");
- goto out_nomisc;
- }
- return 0;
-
-out_nomisc:
- release_region(WDT_START, 1);
-out_nostartreg:
-#if WDT_START != WDT_STOP
- release_region(WDT_STOP, 1);
-#endif
-out_nostopreg:
- return res;
-}
-
-static int __devexit ibwdt_remove(struct platform_device *dev)
-{
- misc_deregister(&ibwdt_miscdev);
- release_region(WDT_START,1);
-#if WDT_START != WDT_STOP
- release_region(WDT_STOP,1);
-#endif
- return 0;
-}
-
-static void ibwdt_shutdown(struct platform_device *dev)
-{
- /* Turn the WDT off if we have a soft shutdown */
- ibwdt_disable();
-}
-
-static struct platform_driver ibwdt_driver = {
- .probe = ibwdt_probe,
- .remove = __devexit_p(ibwdt_remove),
- .shutdown = ibwdt_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = DRV_NAME,
- },
-};
-
-static int __init ibwdt_init(void)
-{
- int err;
-
- printk(KERN_INFO PFX "WDT driver for IB700 single board computer initialising.\n");
-
- err = platform_driver_register(&ibwdt_driver);
- if (err)
- return err;
-
- ibwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
- if (IS_ERR(ibwdt_platform_device)) {
- err = PTR_ERR(ibwdt_platform_device);
- goto unreg_platform_driver;
- }
-
- return 0;
-
-unreg_platform_driver:
- platform_driver_unregister(&ibwdt_driver);
- return err;
-}
-
-static void __exit ibwdt_exit(void)
-{
- platform_device_unregister(ibwdt_platform_device);
- platform_driver_unregister(&ibwdt_driver);
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(ibwdt_init);
-module_exit(ibwdt_exit);
-
-MODULE_AUTHOR("Charles Howes <chowes@vsol.net>");
-MODULE_DESCRIPTION("IB700 SBC watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-/* end of ib700wdt.c */
+++ /dev/null
-/*
- * IBM Automatic Server Restart driver.
- *
- * Copyright (c) 2005 Andrey Panin <pazke@donpac.ru>
- *
- * Based on driver written by Pete Reynolds.
- * Copyright (c) IBM Corporation, 1998-2004.
- *
- * This software may be used and distributed according to the terms
- * of the GNU Public License, incorporated herein by reference.
- */
-
-#include <linux/fs.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/dmi.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-
-enum {
- ASMTYPE_UNKNOWN,
- ASMTYPE_TOPAZ,
- ASMTYPE_JASPER,
- ASMTYPE_PEARL,
- ASMTYPE_JUNIPER,
- ASMTYPE_SPRUCE,
-};
-
-#define PFX "ibmasr: "
-
-#define TOPAZ_ASR_REG_OFFSET 4
-#define TOPAZ_ASR_TOGGLE 0x40
-#define TOPAZ_ASR_DISABLE 0x80
-
-/* PEARL ASR S/W REGISTER SUPERIO PORT ADDRESSES */
-#define PEARL_BASE 0xe04
-#define PEARL_WRITE 0xe06
-#define PEARL_READ 0xe07
-
-#define PEARL_ASR_DISABLE_MASK 0x80 /* bit 7: disable = 1, enable = 0 */
-#define PEARL_ASR_TOGGLE_MASK 0x40 /* bit 6: 0, then 1, then 0 */
-
-/* JASPER OFFSET FROM SIO BASE ADDR TO ASR S/W REGISTERS. */
-#define JASPER_ASR_REG_OFFSET 0x38
-
-#define JASPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1, enable = 0 */
-#define JASPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */
-
-#define JUNIPER_BASE_ADDRESS 0x54b /* Base address of Juniper ASR */
-#define JUNIPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1 enable = 0 */
-#define JUNIPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */
-
-#define SPRUCE_BASE_ADDRESS 0x118e /* Base address of Spruce ASR */
-#define SPRUCE_ASR_DISABLE_MASK 0x01 /* bit 1: disable = 1 enable = 0 */
-#define SPRUCE_ASR_TOGGLE_MASK 0x02 /* bit 0: 0, then 1, then 0 */
-
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-static unsigned long asr_is_open;
-static char asr_expect_close;
-
-static unsigned int asr_type, asr_base, asr_length;
-static unsigned int asr_read_addr, asr_write_addr;
-static unsigned char asr_toggle_mask, asr_disable_mask;
-
-static void asr_toggle(void)
-{
- unsigned char reg = inb(asr_read_addr);
-
- outb(reg & ~asr_toggle_mask, asr_write_addr);
- reg = inb(asr_read_addr);
-
- outb(reg | asr_toggle_mask, asr_write_addr);
- reg = inb(asr_read_addr);
-
- outb(reg & ~asr_toggle_mask, asr_write_addr);
- reg = inb(asr_read_addr);
-}
-
-static void asr_enable(void)
-{
- unsigned char reg;
-
- if (asr_type == ASMTYPE_TOPAZ) {
- /* asr_write_addr == asr_read_addr */
- reg = inb(asr_read_addr);
- outb(reg & ~(TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE),
- asr_read_addr);
- } else {
- /*
- * First make sure the hardware timer is reset by toggling
- * ASR hardware timer line.
- */
- asr_toggle();
-
- reg = inb(asr_read_addr);
- outb(reg & ~asr_disable_mask, asr_write_addr);
- }
- reg = inb(asr_read_addr);
-}
-
-static void asr_disable(void)
-{
- unsigned char reg = inb(asr_read_addr);
-
- if (asr_type == ASMTYPE_TOPAZ)
- /* asr_write_addr == asr_read_addr */
- outb(reg | TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE,
- asr_read_addr);
- else {
- outb(reg | asr_toggle_mask, asr_write_addr);
- reg = inb(asr_read_addr);
-
- outb(reg | asr_disable_mask, asr_write_addr);
- }
- reg = inb(asr_read_addr);
-}
-
-static int __init asr_get_base_address(void)
-{
- unsigned char low, high;
- const char *type = "";
-
- asr_length = 1;
-
- switch (asr_type) {
- case ASMTYPE_TOPAZ:
- /* SELECT SuperIO CHIP FOR QUERYING (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
- outb(0x07, 0x2e);
- outb(0x07, 0x2f);
-
- /* SELECT AND READ THE HIGH-NIBBLE OF THE GPIO BASE ADDRESS */
- outb(0x60, 0x2e);
- high = inb(0x2f);
-
- /* SELECT AND READ THE LOW-NIBBLE OF THE GPIO BASE ADDRESS */
- outb(0x61, 0x2e);
- low = inb(0x2f);
-
- asr_base = (high << 16) | low;
- asr_read_addr = asr_write_addr =
- asr_base + TOPAZ_ASR_REG_OFFSET;
- asr_length = 5;
-
- break;
-
- case ASMTYPE_JASPER:
- type = "Jaspers ";
-
- /* FIXME: need to use pci_config_lock here, but it's not exported */
-
-/* spin_lock_irqsave(&pci_config_lock, flags);*/
-
- /* Select the SuperIO chip in the PCI I/O port register */
- outl(0x8000f858, 0xcf8);
-
- /*
- * Read the base address for the SuperIO chip.
- * Only the lower 16 bits are valid, but the address is word
- * aligned so the last bit must be masked off.
- */
- asr_base = inl(0xcfc) & 0xfffe;
-
-/* spin_unlock_irqrestore(&pci_config_lock, flags);*/
-
- asr_read_addr = asr_write_addr =
- asr_base + JASPER_ASR_REG_OFFSET;
- asr_toggle_mask = JASPER_ASR_TOGGLE_MASK;
- asr_disable_mask = JASPER_ASR_DISABLE_MASK;
- asr_length = JASPER_ASR_REG_OFFSET + 1;
-
- break;
-
- case ASMTYPE_PEARL:
- type = "Pearls ";
- asr_base = PEARL_BASE;
- asr_read_addr = PEARL_READ;
- asr_write_addr = PEARL_WRITE;
- asr_toggle_mask = PEARL_ASR_TOGGLE_MASK;
- asr_disable_mask = PEARL_ASR_DISABLE_MASK;
- asr_length = 4;
- break;
-
- case ASMTYPE_JUNIPER:
- type = "Junipers ";
- asr_base = JUNIPER_BASE_ADDRESS;
- asr_read_addr = asr_write_addr = asr_base;
- asr_toggle_mask = JUNIPER_ASR_TOGGLE_MASK;
- asr_disable_mask = JUNIPER_ASR_DISABLE_MASK;
- break;
-
- case ASMTYPE_SPRUCE:
- type = "Spruce's ";
- asr_base = SPRUCE_BASE_ADDRESS;
- asr_read_addr = asr_write_addr = asr_base;
- asr_toggle_mask = SPRUCE_ASR_TOGGLE_MASK;
- asr_disable_mask = SPRUCE_ASR_DISABLE_MASK;
- break;
- }
-
- if (!request_region(asr_base, asr_length, "ibmasr")) {
- printk(KERN_ERR PFX "address %#x already in use\n",
- asr_base);
- return -EBUSY;
- }
-
- printk(KERN_INFO PFX "found %sASR @ addr %#x\n", type, asr_base);
-
- return 0;
-}
-
-
-static ssize_t asr_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- asr_expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- asr_expect_close = 42;
- }
- }
- asr_toggle();
- }
- return count;
-}
-
-static int asr_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- static const struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .identity = "IBM ASR"
- };
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int heartbeat;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ?
- -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- asr_toggle();
- return 0;
-
- /*
- * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
- * and WDIOC_GETTIMEOUT always returns 256.
- */
- case WDIOC_GETTIMEOUT:
- heartbeat = 256;
- return put_user(heartbeat, p);
-
- case WDIOC_SETOPTIONS: {
- int new_options, retval = -EINVAL;
-
- if (get_user(new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- asr_disable();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- asr_enable();
- asr_toggle();
- retval = 0;
- }
-
- return retval;
- }
- }
-
- return -ENOTTY;
-}
-
-static int asr_open(struct inode *inode, struct file *file)
-{
- if(test_and_set_bit(0, &asr_is_open))
- return -EBUSY;
-
- asr_toggle();
- asr_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static int asr_release(struct inode *inode, struct file *file)
-{
- if (asr_expect_close == 42)
- asr_disable();
- else {
- printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
- asr_toggle();
- }
- clear_bit(0, &asr_is_open);
- asr_expect_close = 0;
- return 0;
-}
-
-static const struct file_operations asr_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = asr_write,
- .ioctl = asr_ioctl,
- .open = asr_open,
- .release = asr_release,
-};
-
-static struct miscdevice asr_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &asr_fops,
-};
-
-
-struct ibmasr_id {
- const char *desc;
- int type;
-};
-
-static struct ibmasr_id __initdata ibmasr_id_table[] = {
- { "IBM Automatic Server Restart - eserver xSeries 220", ASMTYPE_TOPAZ },
- { "IBM Automatic Server Restart - Machine Type 8673", ASMTYPE_PEARL },
- { "IBM Automatic Server Restart - Machine Type 8480", ASMTYPE_JASPER },
- { "IBM Automatic Server Restart - Machine Type 8482", ASMTYPE_JUNIPER },
- { "IBM Automatic Server Restart - Machine Type 8648", ASMTYPE_SPRUCE },
- { NULL }
-};
-
-static int __init ibmasr_init(void)
-{
- struct ibmasr_id *id;
- int rc;
-
- for (id = ibmasr_id_table; id->desc; id++) {
- if (dmi_find_device(DMI_DEV_TYPE_OTHER, id->desc, NULL)) {
- asr_type = id->type;
- break;
- }
- }
-
- if (!asr_type)
- return -ENODEV;
-
- rc = asr_get_base_address();
- if (rc)
- return rc;
-
- rc = misc_register(&asr_miscdev);
- if (rc < 0) {
- release_region(asr_base, asr_length);
- printk(KERN_ERR PFX "failed to register misc device\n");
- return rc;
- }
-
- return 0;
-}
-
-static void __exit ibmasr_exit(void)
-{
- if (!nowayout)
- asr_disable();
-
- misc_deregister(&asr_miscdev);
-
- release_region(asr_base, asr_length);
-}
-
-module_init(ibmasr_init);
-module_exit(ibmasr_exit);
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-MODULE_DESCRIPTION("IBM Automatic Server Restart driver");
-MODULE_AUTHOR("Andrey Panin");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * IndyDog 0.3 A Hardware Watchdog Device for SGI IP22
- *
- * (c) Copyright 2002 Guido Guenther <agx@sigxcpu.org>, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * based on softdog.c by Alan Cox <alan@redhat.com>
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <asm/uaccess.h>
-#include <asm/sgi/mc.h>
-
-#define PFX "indydog: "
-static int indydog_alive;
-
-#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void indydog_start(void)
-{
- u32 mc_ctrl0 = sgimc->cpuctrl0;
-
- mc_ctrl0 = sgimc->cpuctrl0 | SGIMC_CCTRL0_WDOG;
- sgimc->cpuctrl0 = mc_ctrl0;
-}
-
-static void indydog_stop(void)
-{
- u32 mc_ctrl0 = sgimc->cpuctrl0;
-
- mc_ctrl0 &= ~SGIMC_CCTRL0_WDOG;
- sgimc->cpuctrl0 = mc_ctrl0;
-
- printk(KERN_INFO PFX "Stopped watchdog timer.\n");
-}
-
-static void indydog_ping(void)
-{
- sgimc->watchdogt = 0;
-}
-
-/*
- * Allow only one person to hold it open
- */
-static int indydog_open(struct inode *inode, struct file *file)
-{
- if (indydog_alive)
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate timer */
- indydog_start();
- indydog_ping();
-
- indydog_alive = 1;
- printk(KERN_INFO "Started watchdog timer.\n");
-
- return nonseekable_open(inode, file);
-}
-
-static int indydog_release(struct inode *inode, struct file *file)
-{
- /* Shut off the timer.
- * Lock it in if it's a module and we defined ...NOWAYOUT */
- if (!nowayout)
- indydog_stop(); /* Turn the WDT off */
-
- indydog_alive = 0;
-
- return 0;
-}
-
-static ssize_t indydog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- /* Refresh the timer. */
- if (len) {
- indydog_ping();
- }
- return len;
-}
-
-static int indydog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int options, retval = -EINVAL;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "Hardware Watchdog for SGI IP22",
- };
-
- switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- if (copy_to_user((struct watchdog_info *)arg,
- &ident, sizeof(ident)))
- return -EFAULT;
- return 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0,(int *)arg);
- case WDIOC_KEEPALIVE:
- indydog_ping();
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(WATCHDOG_TIMEOUT,(int *)arg);
- case WDIOC_SETOPTIONS:
- {
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- indydog_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- indydog_start();
- retval = 0;
- }
-
- return retval;
- }
- }
-}
-
-static int indydog_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- indydog_stop(); /* Turn the WDT off */
-
- return NOTIFY_DONE;
-}
-
-static const struct file_operations indydog_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = indydog_write,
- .ioctl = indydog_ioctl,
- .open = indydog_open,
- .release = indydog_release,
-};
-
-static struct miscdevice indydog_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &indydog_fops,
-};
-
-static struct notifier_block indydog_notifier = {
- .notifier_call = indydog_notify_sys,
-};
-
-static char banner[] __initdata =
- KERN_INFO PFX "Hardware Watchdog Timer for SGI IP22: 0.3\n";
-
-static int __init watchdog_init(void)
-{
- int ret;
-
- ret = register_reboot_notifier(&indydog_notifier);
- if (ret) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- return ret;
- }
-
- ret = misc_register(&indydog_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&indydog_notifier);
- return ret;
- }
-
- printk(banner);
-
- return 0;
-}
-
-static void __exit watchdog_exit(void)
-{
- misc_deregister(&indydog_miscdev);
- unregister_reboot_notifier(&indydog_notifier);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
-
-MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
-MODULE_DESCRIPTION("Hardware Watchdog Device for SGI IP22");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * drivers/char/watchdog/iop_wdt.c
- *
- * WDT driver for Intel I/O Processors
- * Copyright (C) 2005, Intel Corporation.
- *
- * Based on ixp4xx driver, Copyright 2004 (c) MontaVista, Software, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307 USA.
- *
- * Curt E Bruns <curt.e.bruns@intel.com>
- * Peter Milne <peter.milne@d-tacq.com>
- * Dan Williams <dan.j.williams@intel.com>
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/uaccess.h>
-#include <asm/hardware.h>
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static unsigned long wdt_status;
-static unsigned long boot_status;
-
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-#define WDT_ENABLED 2
-
-static unsigned long iop_watchdog_timeout(void)
-{
- return (0xffffffffUL / get_iop_tick_rate());
-}
-
-/**
- * wdt_supports_disable - determine if we are accessing a iop13xx watchdog
- * or iop3xx by whether it has a disable command
- */
-static int wdt_supports_disable(void)
-{
- int can_disable;
-
- if (IOP_WDTCR_EN_ARM != IOP_WDTCR_DIS_ARM)
- can_disable = 1;
- else
- can_disable = 0;
-
- return can_disable;
-}
-
-static void wdt_enable(void)
-{
- /* Arm and enable the Timer to starting counting down from 0xFFFF.FFFF
- * Takes approx. 10.7s to timeout
- */
- write_wdtcr(IOP_WDTCR_EN_ARM);
- write_wdtcr(IOP_WDTCR_EN);
-}
-
-/* returns 0 if the timer was successfully disabled */
-static int wdt_disable(void)
-{
- /* Stop Counting */
- if (wdt_supports_disable()) {
- write_wdtcr(IOP_WDTCR_DIS_ARM);
- write_wdtcr(IOP_WDTCR_DIS);
- clear_bit(WDT_ENABLED, &wdt_status);
- printk(KERN_INFO "WATCHDOG: Disabled\n");
- return 0;
- } else
- return 1;
-}
-
-static int iop_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- wdt_enable();
-
- set_bit(WDT_ENABLED, &wdt_status);
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-iop_wdt_write(struct file *file, const char *data, size_t len,
- loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- }
- }
- wdt_enable();
- }
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
- .identity = "iop watchdog",
-};
-
-static int
-iop_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int options;
- int ret = -ENOTTY;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user
- ((struct watchdog_info *)arg, &ident, sizeof ident))
- ret = -EFAULT;
- else
- ret = 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
- break;
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(iop_watchdog_timeout(), (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_enable();
- ret = 0;
- break;
-
- case WDIOC_SETOPTIONS:
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- if (!nowayout) {
- if (wdt_disable() == 0) {
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- ret = 0;
- } else
- ret = -ENXIO;
- } else
- ret = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wdt_enable();
- ret = 0;
- }
- break;
- }
-
- return ret;
-}
-
-static int iop_wdt_release(struct inode *inode, struct file *file)
-{
- int state = 1;
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
- if (test_bit(WDT_ENABLED, &wdt_status))
- state = wdt_disable();
-
- /* if the timer is not disbaled reload and notify that we are still
- * going down
- */
- if (state != 0) {
- wdt_enable();
- printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
- "reset in %lu seconds\n", iop_watchdog_timeout());
- }
-
- clear_bit(WDT_IN_USE, &wdt_status);
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- return 0;
-}
-
-static const struct file_operations iop_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = iop_wdt_write,
- .ioctl = iop_wdt_ioctl,
- .open = iop_wdt_open,
- .release = iop_wdt_release,
-};
-
-static struct miscdevice iop_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &iop_wdt_fops,
-};
-
-static int __init iop_wdt_init(void)
-{
- int ret;
-
- ret = misc_register(&iop_wdt_miscdev);
- if (ret == 0)
- printk("iop watchdog timer: timeout %lu sec\n",
- iop_watchdog_timeout());
-
- /* check if the reset was caused by the watchdog timer */
- boot_status = (read_rcsr() & IOP_RCSR_WDT) ? WDIOF_CARDRESET : 0;
-
- /* Configure Watchdog Timeout to cause an Internal Bus (IB) Reset
- * NOTE: An IB Reset will Reset both cores in the IOP342
- */
- write_wdtsr(IOP13XX_WDTCR_IB_RESET);
-
- return ret;
-}
-
-static void __exit iop_wdt_exit(void)
-{
- misc_deregister(&iop_wdt_miscdev);
-}
-
-module_init(iop_wdt_init);
-module_exit(iop_wdt_exit);
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
-MODULE_AUTHOR("Curt E Bruns <curt.e.bruns@intel.com>");
-MODULE_DESCRIPTION("iop watchdog timer driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * drivers/char/watchdog/ixp2000_wdt.c
- *
- * Watchdog driver for Intel IXP2000 network processors
- *
- * Adapted from the IXP4xx watchdog driver by Lennert Buytenhek.
- * The original version carries these notices:
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- * Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static unsigned int heartbeat = 60; /* (secs) Default is 1 minute */
-static unsigned long wdt_status;
-
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-
-static unsigned long wdt_tick_rate;
-
-static void
-wdt_enable(void)
-{
- ixp2000_reg_write(IXP2000_RESET0, *(IXP2000_RESET0) | WDT_RESET_ENABLE);
- ixp2000_reg_write(IXP2000_TWDE, WDT_ENABLE);
- ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
- ixp2000_reg_write(IXP2000_T4_CTL, TIMER_DIVIDER_256 | TIMER_ENABLE);
-}
-
-static void
-wdt_disable(void)
-{
- ixp2000_reg_write(IXP2000_T4_CTL, 0);
-}
-
-static void
-wdt_keepalive(void)
-{
- ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
-}
-
-static int
-ixp2000_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-ixp2000_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- }
- }
- wdt_keepalive();
- }
-
- return len;
-}
-
-
-static struct watchdog_info ident = {
- .options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING,
- .identity = "IXP2000 Watchdog",
-};
-
-static int
-ixp2000_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY;
- int time;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, (int *)arg);
- if (ret)
- break;
-
- if (time <= 0 || time > 60) {
- ret = -EINVAL;
- break;
- }
-
- heartbeat = time;
- wdt_keepalive();
- /* Fall through */
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(heartbeat, (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_enable();
- ret = 0;
- break;
- }
-
- return ret;
-}
-
-static int
-ixp2000_wdt_release(struct inode *inode, struct file *file)
-{
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
- wdt_disable();
- } else {
- printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
- "timer will not stop\n");
- }
-
- clear_bit(WDT_IN_USE, &wdt_status);
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- return 0;
-}
-
-
-static const struct file_operations ixp2000_wdt_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ixp2000_wdt_write,
- .ioctl = ixp2000_wdt_ioctl,
- .open = ixp2000_wdt_open,
- .release = ixp2000_wdt_release,
-};
-
-static struct miscdevice ixp2000_wdt_miscdev =
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ixp2000_wdt_fops,
-};
-
-static int __init ixp2000_wdt_init(void)
-{
- if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
- printk(KERN_INFO "Unable to use IXP2000 watchdog due to IXP2800 erratum #25.\n");
- return -EIO;
- }
-
- wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256;
-
- return misc_register(&ixp2000_wdt_miscdev);
-}
-
-static void __exit ixp2000_wdt_exit(void)
-{
- misc_deregister(&ixp2000_wdt_miscdev);
-}
-
-module_init(ixp2000_wdt_init);
-module_exit(ixp2000_wdt_exit);
-
-MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
-MODULE_DESCRIPTION("IXP2000 Network Processor Watchdog");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
+++ /dev/null
-/*
- * drivers/char/watchdog/ixp4xx_wdt.c
- *
- * Watchdog driver for Intel IXP4xx network processors
- *
- * Author: Deepak Saxena <dsaxena@plexity.net>
- *
- * Copyright 2004 (c) MontaVista, Software, Inc.
- * Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static int heartbeat = 60; /* (secs) Default is 1 minute */
-static unsigned long wdt_status;
-static unsigned long boot_status;
-
-#define WDT_TICK_RATE (IXP4XX_PERIPHERAL_BUS_CLOCK * 1000000UL)
-
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-
-static void
-wdt_enable(void)
-{
- *IXP4XX_OSWK = IXP4XX_WDT_KEY;
- *IXP4XX_OSWE = 0;
- *IXP4XX_OSWT = WDT_TICK_RATE * heartbeat;
- *IXP4XX_OSWE = IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE;
- *IXP4XX_OSWK = 0;
-}
-
-static void
-wdt_disable(void)
-{
- *IXP4XX_OSWK = IXP4XX_WDT_KEY;
- *IXP4XX_OSWE = 0;
- *IXP4XX_OSWK = 0;
-}
-
-static int
-ixp4xx_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-ixp4xx_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- }
- }
- wdt_enable();
- }
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = "IXP4xx Watchdog",
-};
-
-
-static int
-ixp4xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY;
- int time;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, (int *)arg);
- if (ret)
- break;
-
- if (time <= 0 || time > 60) {
- ret = -EINVAL;
- break;
- }
-
- heartbeat = time;
- wdt_enable();
- /* Fall through */
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(heartbeat, (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_enable();
- ret = 0;
- break;
- }
- return ret;
-}
-
-static int
-ixp4xx_wdt_release(struct inode *inode, struct file *file)
-{
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
- wdt_disable();
- } else {
- printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
- "timer will not stop\n");
- }
-
- clear_bit(WDT_IN_USE, &wdt_status);
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- return 0;
-}
-
-
-static const struct file_operations ixp4xx_wdt_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ixp4xx_wdt_write,
- .ioctl = ixp4xx_wdt_ioctl,
- .open = ixp4xx_wdt_open,
- .release = ixp4xx_wdt_release,
-};
-
-static struct miscdevice ixp4xx_wdt_miscdev =
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ixp4xx_wdt_fops,
-};
-
-static int __init ixp4xx_wdt_init(void)
-{
- int ret;
- unsigned long processor_id;
-
- asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
- if (!(processor_id & 0xf) && !cpu_is_ixp46x()) {
- printk("IXP4XXX Watchdog: Rev. A0 IXP42x CPU detected - "
- "watchdog disabled\n");
-
- return -ENODEV;
- }
-
- ret = misc_register(&ixp4xx_wdt_miscdev);
- if (ret == 0)
- printk("IXP4xx Watchdog Timer: heartbeat %d sec\n", heartbeat);
-
- boot_status = (*IXP4XX_OSST & IXP4XX_OSST_TIMER_WARM_RESET) ?
- WDIOF_CARDRESET : 0;
-
- return ret;
-}
-
-static void __exit ixp4xx_wdt_exit(void)
-{
- misc_deregister(&ixp4xx_wdt_miscdev);
-}
-
-
-module_init(ixp4xx_wdt_init);
-module_exit(ixp4xx_wdt_exit);
-
-MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
-MODULE_DESCRIPTION("IXP4xx Network Processor Watchdog");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
+++ /dev/null
-/*
- * Watchdog driver for Kendin/Micrel KS8695.
- *
- * (C) 2007 Andrew Victor
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-#include <asm/bitops.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/arch/regs-timer.h>
-
-
-#define WDT_DEFAULT_TIME 5 /* seconds */
-#define WDT_MAX_TIME 171 /* seconds */
-
-static int wdt_time = WDT_DEFAULT_TIME;
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-#endif
-
-
-static unsigned long ks8695wdt_busy;
-
-/* ......................................................................... */
-
-/*
- * Disable the watchdog.
- */
-static void inline ks8695_wdt_stop(void)
-{
- unsigned long tmcon;
-
- /* disable timer0 */
- tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
- __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-}
-
-/*
- * Enable and reset the watchdog.
- */
-static void inline ks8695_wdt_start(void)
-{
- unsigned long tmcon;
- unsigned long tval = wdt_time * CLOCK_TICK_RATE;
-
- /* disable timer0 */
- tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
- __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-
- /* program timer0 */
- __raw_writel(tval | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
-
- /* re-enable timer0 */
- tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
- __raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-}
-
-/*
- * Reload the watchdog timer. (ie, pat the watchdog)
- */
-static void inline ks8695_wdt_reload(void)
-{
- unsigned long tmcon;
-
- /* disable, then re-enable timer0 */
- tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
- __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
- __raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
-}
-
-/*
- * Change the watchdog time interval.
- */
-static int ks8695_wdt_settimeout(int new_time)
-{
- /*
- * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
- *
- * Since WDV is a 16-bit counter, the maximum period is
- * 65536 / 0.256 = 256 seconds.
- */
- if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
- return -EINVAL;
-
- /* Set new watchdog time. It will be used when ks8695_wdt_start() is called. */
- wdt_time = new_time;
- return 0;
-}
-
-/* ......................................................................... */
-
-/*
- * Watchdog device is opened, and watchdog starts running.
- */
-static int ks8695_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &ks8695wdt_busy))
- return -EBUSY;
-
- ks8695_wdt_start();
- return nonseekable_open(inode, file);
-}
-
-/*
- * Close the watchdog device.
- * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
- * disabled.
- */
-static int ks8695_wdt_close(struct inode *inode, struct file *file)
-{
- if (!nowayout)
- ks8695_wdt_stop(); /* Disable the watchdog when file is closed */
-
- clear_bit(0, &ks8695wdt_busy);
- return 0;
-}
-
-static struct watchdog_info ks8695_wdt_info = {
- .identity = "ks8695 watchdog",
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
-};
-
-/*
- * Handle commands from user-space.
- */
-static int ks8695_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_value;
-
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- ks8695_wdt_reload(); /* pat the watchdog */
- return 0;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ks8695_wdt_info, sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (ks8695_wdt_settimeout(new_value))
- return -EINVAL;
-
- /* Enable new time value */
- ks8695_wdt_start();
-
- /* Return current value */
- return put_user(wdt_time, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdt_time, p);
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (new_value & WDIOS_DISABLECARD)
- ks8695_wdt_stop();
- if (new_value & WDIOS_ENABLECARD)
- ks8695_wdt_start();
- return 0;
-
- default:
- return -ENOTTY;
- }
-}
-
-/*
- * Pat the watchdog whenever device is written to.
- */
-static ssize_t ks8695_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- ks8695_wdt_reload(); /* pat the watchdog */
- return len;
-}
-
-/* ......................................................................... */
-
-static const struct file_operations ks8695wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = ks8695_wdt_ioctl,
- .open = ks8695_wdt_open,
- .release = ks8695_wdt_close,
- .write = ks8695_wdt_write,
-};
-
-static struct miscdevice ks8695wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &ks8695wdt_fops,
-};
-
-static int __init ks8695wdt_probe(struct platform_device *pdev)
-{
- int res;
-
- if (ks8695wdt_miscdev.parent)
- return -EBUSY;
- ks8695wdt_miscdev.parent = &pdev->dev;
-
- res = misc_register(&ks8695wdt_miscdev);
- if (res)
- return res;
-
- printk("KS8695 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
- return 0;
-}
-
-static int __exit ks8695wdt_remove(struct platform_device *pdev)
-{
- int res;
-
- res = misc_deregister(&ks8695wdt_miscdev);
- if (!res)
- ks8695wdt_miscdev.parent = NULL;
-
- return res;
-}
-
-static void ks8695wdt_shutdown(struct platform_device *pdev)
-{
- ks8695_wdt_stop();
-}
-
-#ifdef CONFIG_PM
-
-static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
- ks8695_wdt_stop();
- return 0;
-}
-
-static int ks8695wdt_resume(struct platform_device *pdev)
-{
- if (ks8695wdt_busy)
- ks8695_wdt_start();
- return 0;
-}
-
-#else
-#define ks8695wdt_suspend NULL
-#define ks8695wdt_resume NULL
-#endif
-
-static struct platform_driver ks8695wdt_driver = {
- .probe = ks8695wdt_probe,
- .remove = __exit_p(ks8695wdt_remove),
- .shutdown = ks8695wdt_shutdown,
- .suspend = ks8695wdt_suspend,
- .resume = ks8695wdt_resume,
- .driver = {
- .name = "ks8695_wdt",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init ks8695_wdt_init(void)
-{
- /* Check that the heartbeat value is within range; if not reset to the default */
- if (ks8695_wdt_settimeout(wdt_time)) {
- ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
- pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", wdt_time, WDT_MAX_TIME);
- }
-
- return platform_driver_register(&ks8695wdt_driver);
-}
-
-static void __exit ks8695_wdt_exit(void)
-{
- platform_driver_unregister(&ks8695wdt_driver);
-}
-
-module_init(ks8695_wdt_init);
-module_exit(ks8695_wdt_exit);
-
-MODULE_AUTHOR("Andrew Victor");
-MODULE_DESCRIPTION("Watchdog driver for KS8695");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * MachZ ZF-Logic Watchdog Timer driver for Linux
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The author does NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
- *
- * Author: Fernando Fuganti <fuganti@conectiva.com.br>
- *
- * Based on sbc60xxwdt.c by Jakob Oestergaard
- *
- *
- * We have two timers (wd#1, wd#2) driven by a 32 KHz clock with the
- * following periods:
- * wd#1 - 2 seconds;
- * wd#2 - 7.2 ms;
- * After the expiration of wd#1, it can generate a NMI, SCI, SMI, or
- * a system RESET and it starts wd#2 that unconditionaly will RESET
- * the system when the counter reaches zero.
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/jiffies.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/* ports */
-#define ZF_IOBASE 0x218
-#define INDEX 0x218
-#define DATA_B 0x219
-#define DATA_W 0x21A
-#define DATA_D 0x21A
-
-/* indexes */ /* size */
-#define ZFL_VERSION 0x02 /* 16 */
-#define CONTROL 0x10 /* 16 */
-#define STATUS 0x12 /* 8 */
-#define COUNTER_1 0x0C /* 16 */
-#define COUNTER_2 0x0E /* 8 */
-#define PULSE_LEN 0x0F /* 8 */
-
-/* controls */
-#define ENABLE_WD1 0x0001
-#define ENABLE_WD2 0x0002
-#define RESET_WD1 0x0010
-#define RESET_WD2 0x0020
-#define GEN_SCI 0x0100
-#define GEN_NMI 0x0200
-#define GEN_SMI 0x0400
-#define GEN_RESET 0x0800
-
-
-/* utilities */
-
-#define WD1 0
-#define WD2 1
-
-#define zf_writew(port, data) { outb(port, INDEX); outw(data, DATA_W); }
-#define zf_writeb(port, data) { outb(port, INDEX); outb(data, DATA_B); }
-#define zf_get_ZFL_version() zf_readw(ZFL_VERSION)
-
-
-static unsigned short zf_readw(unsigned char port)
-{
- outb(port, INDEX);
- return inw(DATA_W);
-}
-
-
-MODULE_AUTHOR("Fernando Fuganti <fuganti@conectiva.com.br>");
-MODULE_DESCRIPTION("MachZ ZF-Logic Watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-#define PFX "machzwd"
-
-static struct watchdog_info zf_info = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "ZF-Logic watchdog",
-};
-
-
-/*
- * action refers to action taken when watchdog resets
- * 0 = GEN_RESET
- * 1 = GEN_SMI
- * 2 = GEN_NMI
- * 3 = GEN_SCI
- * defaults to GEN_RESET (0)
- */
-static int action = 0;
-module_param(action, int, 0);
-MODULE_PARM_DESC(action, "after watchdog resets, generate: 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI");
-
-static void zf_ping(unsigned long data);
-
-static int zf_action = GEN_RESET;
-static unsigned long zf_is_open;
-static char zf_expect_close;
-static spinlock_t zf_lock;
-static spinlock_t zf_port_lock;
-static DEFINE_TIMER(zf_timer, zf_ping, 0, 0);
-static unsigned long next_heartbeat = 0;
-
-
-/* timeout for user land heart beat (10 seconds) */
-#define ZF_USER_TIMEO (HZ*10)
-
-/* timeout for hardware watchdog (~500ms) */
-#define ZF_HW_TIMEO (HZ/2)
-
-/* number of ticks on WD#1 (driven by a 32KHz clock, 2s) */
-#define ZF_CTIMEOUT 0xffff
-
-#ifndef ZF_DEBUG
-# define dprintk(format, args...)
-#else
-# define dprintk(format, args...) printk(KERN_DEBUG PFX ":%s:%d: " format, __FUNCTION__, __LINE__ , ## args)
-#endif
-
-
-static inline void zf_set_status(unsigned char new)
-{
- zf_writeb(STATUS, new);
-}
-
-
-/* CONTROL register functions */
-
-static inline unsigned short zf_get_control(void)
-{
- return zf_readw(CONTROL);
-}
-
-static inline void zf_set_control(unsigned short new)
-{
- zf_writew(CONTROL, new);
-}
-
-
-/* WD#? counter functions */
-/*
- * Just set counter value
- */
-
-static inline void zf_set_timer(unsigned short new, unsigned char n)
-{
- switch(n){
- case WD1:
- zf_writew(COUNTER_1, new);
- case WD2:
- zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
- default:
- return;
- }
-}
-
-/*
- * stop hardware timer
- */
-static void zf_timer_off(void)
-{
- unsigned int ctrl_reg = 0;
- unsigned long flags;
-
- /* stop internal ping */
- del_timer_sync(&zf_timer);
-
- spin_lock_irqsave(&zf_port_lock, flags);
- /* stop watchdog timer */
- ctrl_reg = zf_get_control();
- ctrl_reg |= (ENABLE_WD1|ENABLE_WD2); /* disable wd1 and wd2 */
- ctrl_reg &= ~(ENABLE_WD1|ENABLE_WD2);
- zf_set_control(ctrl_reg);
- spin_unlock_irqrestore(&zf_port_lock, flags);
-
- printk(KERN_INFO PFX ": Watchdog timer is now disabled\n");
-}
-
-
-/*
- * start hardware timer
- */
-static void zf_timer_on(void)
-{
- unsigned int ctrl_reg = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&zf_port_lock, flags);
-
- zf_writeb(PULSE_LEN, 0xff);
-
- zf_set_timer(ZF_CTIMEOUT, WD1);
-
- /* user land ping */
- next_heartbeat = jiffies + ZF_USER_TIMEO;
-
- /* start the timer for internal ping */
- mod_timer(&zf_timer, jiffies + ZF_HW_TIMEO);
-
- /* start watchdog timer */
- ctrl_reg = zf_get_control();
- ctrl_reg |= (ENABLE_WD1|zf_action);
- zf_set_control(ctrl_reg);
- spin_unlock_irqrestore(&zf_port_lock, flags);
-
- printk(KERN_INFO PFX ": Watchdog timer is now enabled\n");
-}
-
-
-static void zf_ping(unsigned long data)
-{
- unsigned int ctrl_reg = 0;
- unsigned long flags;
-
- zf_writeb(COUNTER_2, 0xff);
-
- if(time_before(jiffies, next_heartbeat)){
-
- dprintk("time_before: %ld\n", next_heartbeat - jiffies);
-
- /*
- * reset event is activated by transition from 0 to 1 on
- * RESET_WD1 bit and we assume that it is already zero...
- */
-
- spin_lock_irqsave(&zf_port_lock, flags);
- ctrl_reg = zf_get_control();
- ctrl_reg |= RESET_WD1;
- zf_set_control(ctrl_reg);
-
- /* ...and nothing changes until here */
- ctrl_reg &= ~(RESET_WD1);
- zf_set_control(ctrl_reg);
- spin_unlock_irqrestore(&zf_port_lock, flags);
-
- mod_timer(&zf_timer, jiffies + ZF_HW_TIMEO);
- }else{
- printk(KERN_CRIT PFX ": I will reset your machine\n");
- }
-}
-
-static ssize_t zf_write(struct file *file, const char __user *buf, size_t count,
- loff_t *ppos)
-{
- /* See if we got the magic character */
- if(count){
-
- /*
- * no need to check for close confirmation
- * no way to disable watchdog ;)
- */
- if (!nowayout) {
- size_t ofs;
-
- /*
- * note: just in case someone wrote the magic character
- * five months ago...
- */
- zf_expect_close = 0;
-
- /* now scan */
- for (ofs = 0; ofs != count; ofs++){
- char c;
- if (get_user(c, buf + ofs))
- return -EFAULT;
- if (c == 'V'){
- zf_expect_close = 42;
- dprintk("zf_expect_close = 42\n");
- }
- }
- }
-
- /*
- * Well, anyhow someone wrote to us,
- * we should return that favour
- */
- next_heartbeat = jiffies + ZF_USER_TIMEO;
- dprintk("user ping at %ld\n", jiffies);
-
- }
-
- return count;
-}
-
-static int zf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &zf_info, sizeof(zf_info)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- zf_ping(0);
- break;
-
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-
-static int zf_open(struct inode *inode, struct file *file)
-{
- spin_lock(&zf_lock);
- if(test_and_set_bit(0, &zf_is_open)) {
- spin_unlock(&zf_lock);
- return -EBUSY;
- }
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- spin_unlock(&zf_lock);
-
- zf_timer_on();
-
- return nonseekable_open(inode, file);
-}
-
-static int zf_close(struct inode *inode, struct file *file)
-{
- if(zf_expect_close == 42){
- zf_timer_off();
- } else {
- del_timer(&zf_timer);
- printk(KERN_ERR PFX ": device file closed unexpectedly. Will not stop the WDT!\n");
- }
-
- spin_lock(&zf_lock);
- clear_bit(0, &zf_is_open);
- spin_unlock(&zf_lock);
-
- zf_expect_close = 0;
-
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int zf_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code == SYS_DOWN || code == SYS_HALT){
- zf_timer_off();
- }
-
- return NOTIFY_DONE;
-}
-
-
-
-
-static const struct file_operations zf_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = zf_write,
- .ioctl = zf_ioctl,
- .open = zf_open,
- .release = zf_close,
-};
-
-static struct miscdevice zf_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &zf_fops,
-};
-
-
-/*
- * The device needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-static struct notifier_block zf_notifier = {
- .notifier_call = zf_notify_sys,
-};
-
-static void __init zf_show_action(int act)
-{
- char *str[] = { "RESET", "SMI", "NMI", "SCI" };
-
- printk(KERN_INFO PFX ": Watchdog using action = %s\n", str[act]);
-}
-
-static int __init zf_init(void)
-{
- int ret;
-
- printk(KERN_INFO PFX ": MachZ ZF-Logic Watchdog driver initializing.\n");
-
- ret = zf_get_ZFL_version();
- if ((!ret) || (ret == 0xffff)) {
- printk(KERN_WARNING PFX ": no ZF-Logic found\n");
- return -ENODEV;
- }
-
- if((action <= 3) && (action >= 0)){
- zf_action = zf_action>>action;
- } else
- action = 0;
-
- zf_show_action(action);
-
- spin_lock_init(&zf_lock);
- spin_lock_init(&zf_port_lock);
-
- if(!request_region(ZF_IOBASE, 3, "MachZ ZFL WDT")){
- printk(KERN_ERR "cannot reserve I/O ports at %d\n",
- ZF_IOBASE);
- ret = -EBUSY;
- goto no_region;
- }
-
- ret = register_reboot_notifier(&zf_notifier);
- if(ret){
- printk(KERN_ERR "can't register reboot notifier (err=%d)\n",
- ret);
- goto no_reboot;
- }
-
- ret = misc_register(&zf_miscdev);
- if (ret){
- printk(KERN_ERR "can't misc_register on minor=%d\n",
- WATCHDOG_MINOR);
- goto no_misc;
- }
-
- zf_set_status(0);
- zf_set_control(0);
-
- return 0;
-
-no_misc:
- unregister_reboot_notifier(&zf_notifier);
-no_reboot:
- release_region(ZF_IOBASE, 3);
-no_region:
- return ret;
-}
-
-
-static void __exit zf_exit(void)
-{
- zf_timer_off();
-
- misc_deregister(&zf_miscdev);
- unregister_reboot_notifier(&zf_notifier);
- release_region(ZF_IOBASE, 3);
-}
-
-module_init(zf_init);
-module_exit(zf_exit);
+++ /dev/null
-/*
- * MixCom Watchdog: A Simple Hardware Watchdog Device
- * Based on Softdog driver by Alan Cox and PC Watchdog driver by Ken Hollis
- *
- * Author: Gergely Madarasz <gorgo@itc.hu>
- *
- * Copyright (c) 1999 ITConsult-Pro Co. <info@itc.hu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Version 0.1 (99/04/15):
- * - first version
- *
- * Version 0.2 (99/06/16):
- * - added kernel timer watchdog ping after close
- * since the hardware does not support watchdog shutdown
- *
- * Version 0.3 (99/06/21):
- * - added WDIOC_GETSTATUS and WDIOC_GETSUPPORT ioctl calls
- *
- * Version 0.3.1 (99/06/22):
- * - allow module removal while internal timer is active,
- * print warning about probable reset
- *
- * Version 0.4 (99/11/15):
- * - support for one more type board
- *
- * Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com>
- * - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- *
- * Version 0.6 (2002/04/12): Rob Radez <rob@osinvestor.com>
- * - make mixcomwd_opened unsigned,
- * removed lock_kernel/unlock_kernel from mixcomwd_release,
- * modified ioctl a bit to conform to API
- *
- */
-
-#define VERSION "0.6"
-#define WATCHDOG_NAME "mixcomwd"
-#define PFX WATCHDOG_NAME ": "
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-/*
- * We have two types of cards that can be probed:
- * 1) The Mixcom cards: these cards can be found at addresses
- * 0x180, 0x280, 0x380 with an additional offset of 0xc10.
- * (Or 0xd90, 0xe90, 0xf90).
- * 2) The FlashCOM cards: these cards can be set up at
- * 0x300 -> 0x378, in 0x8 jumps with an offset of 0x04.
- * (Or 0x304 -> 0x37c in 0x8 jumps).
- * Each card has it's own ID.
- */
-#define MIXCOM_ID 0x11
-#define FLASHCOM_ID 0x18
-static struct {
- int ioport;
- int id;
-} mixcomwd_io_info[] __devinitdata = {
- /* The Mixcom cards */
- {0x0d90, MIXCOM_ID},
- {0x0e90, MIXCOM_ID},
- {0x0f90, MIXCOM_ID},
- /* The FlashCOM cards */
- {0x0304, FLASHCOM_ID},
- {0x030c, FLASHCOM_ID},
- {0x0314, FLASHCOM_ID},
- {0x031c, FLASHCOM_ID},
- {0x0324, FLASHCOM_ID},
- {0x032c, FLASHCOM_ID},
- {0x0334, FLASHCOM_ID},
- {0x033c, FLASHCOM_ID},
- {0x0344, FLASHCOM_ID},
- {0x034c, FLASHCOM_ID},
- {0x0354, FLASHCOM_ID},
- {0x035c, FLASHCOM_ID},
- {0x0364, FLASHCOM_ID},
- {0x036c, FLASHCOM_ID},
- {0x0374, FLASHCOM_ID},
- {0x037c, FLASHCOM_ID},
- /* The end of the list */
- {0x0000, 0},
-};
-
-static void mixcomwd_timerfun(unsigned long d);
-
-static unsigned long mixcomwd_opened; /* long req'd for setbit --RR */
-
-static int watchdog_port;
-static int mixcomwd_timer_alive;
-static DEFINE_TIMER(mixcomwd_timer, mixcomwd_timerfun, 0, 0);
-static char expect_close;
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void mixcomwd_ping(void)
-{
- outb_p(55,watchdog_port);
- return;
-}
-
-static void mixcomwd_timerfun(unsigned long d)
-{
- mixcomwd_ping();
-
- mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
-}
-
-/*
- * Allow only one person to hold it open
- */
-
-static int mixcomwd_open(struct inode *inode, struct file *file)
-{
- if(test_and_set_bit(0,&mixcomwd_opened)) {
- return -EBUSY;
- }
- mixcomwd_ping();
-
- if (nowayout) {
- /*
- * fops_get() code via open() has already done
- * a try_module_get() so it is safe to do the
- * __module_get().
- */
- __module_get(THIS_MODULE);
- } else {
- if(mixcomwd_timer_alive) {
- del_timer(&mixcomwd_timer);
- mixcomwd_timer_alive=0;
- }
- }
- return nonseekable_open(inode, file);
-}
-
-static int mixcomwd_release(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- if(mixcomwd_timer_alive) {
- printk(KERN_ERR PFX "release called while internal timer alive");
- return -EBUSY;
- }
- mixcomwd_timer_alive=1;
- mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
- }
-
- clear_bit(0,&mixcomwd_opened);
- expect_close=0;
- return 0;
-}
-
-
-static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
-{
- if(len)
- {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- mixcomwd_ping();
- }
- return len;
-}
-
-static int mixcomwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int status;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "MixCOM watchdog",
- };
-
- switch(cmd)
- {
- case WDIOC_GETSTATUS:
- status=mixcomwd_opened;
- if (!nowayout) {
- status|=mixcomwd_timer_alive;
- }
- if (copy_to_user(p, &status, sizeof(int))) {
- return -EFAULT;
- }
- break;
- case WDIOC_GETBOOTSTATUS:
- if (copy_to_user(p, &status, sizeof(int))) {
- return -EFAULT;
- }
- break;
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident))) {
- return -EFAULT;
- }
- break;
- case WDIOC_KEEPALIVE:
- mixcomwd_ping();
- break;
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static const struct file_operations mixcomwd_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = mixcomwd_write,
- .ioctl = mixcomwd_ioctl,
- .open = mixcomwd_open,
- .release = mixcomwd_release,
-};
-
-static struct miscdevice mixcomwd_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mixcomwd_fops,
-};
-
-static int __init checkcard(int port, int card_id)
-{
- int id;
-
- if (!request_region(port, 1, "MixCOM watchdog")) {
- return 0;
- }
-
- id=inb_p(port);
- if (card_id==MIXCOM_ID)
- id &= 0x3f;
-
- if (id!=card_id) {
- release_region(port, 1);
- return 0;
- }
- return 1;
-}
-
-static int __init mixcomwd_init(void)
-{
- int i;
- int ret;
- int found=0;
-
- for (i = 0; !found && mixcomwd_io_info[i].ioport != 0; i++) {
- if (checkcard(mixcomwd_io_info[i].ioport,
- mixcomwd_io_info[i].id)) {
- found = 1;
- watchdog_port = mixcomwd_io_info[i].ioport;
- }
- }
-
- if (!found) {
- printk(KERN_ERR PFX "No card detected, or port not available.\n");
- return -ENODEV;
- }
-
- ret = misc_register(&mixcomwd_miscdev);
- if (ret)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto error_misc_register_watchdog;
- }
-
- printk(KERN_INFO "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
- VERSION, watchdog_port);
-
- return 0;
-
-error_misc_register_watchdog:
- release_region(watchdog_port, 1);
- watchdog_port = 0x0000;
- return ret;
-}
-
-static void __exit mixcomwd_exit(void)
-{
- if (!nowayout) {
- if(mixcomwd_timer_alive) {
- printk(KERN_WARNING PFX "I quit now, hardware will"
- " probably reboot!\n");
- del_timer_sync(&mixcomwd_timer);
- mixcomwd_timer_alive=0;
- }
- }
- misc_deregister(&mixcomwd_miscdev);
- release_region(watchdog_port,1);
-}
-
-module_init(mixcomwd_init);
-module_exit(mixcomwd_exit);
-
-MODULE_AUTHOR("Gergely Madarasz <gorgo@itc.hu>");
-MODULE_DESCRIPTION("MixCom Watchdog driver");
-MODULE_VERSION(VERSION);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <asm/of_platform.h>
-#include <asm/uaccess.h>
-#include <asm/mpc52xx.h>
-
-
-#define GPT_MODE_WDT (1<<15)
-#define GPT_MODE_CE (1<<12)
-#define GPT_MODE_MS_TIMER (0x4)
-
-
-struct mpc5200_wdt {
- unsigned count; /* timer ticks before watchdog kicks in */
- long ipb_freq;
- struct miscdevice miscdev;
- struct resource mem;
- struct mpc52xx_gpt __iomem *regs;
- spinlock_t io_lock;
-};
-
-/* is_active stores wether or not the /dev/watchdog device is opened */
-static unsigned long is_active;
-
-/* misc devices don't provide a way, to get back to 'dev' or 'miscdev' from
- * file operations, which sucks. But there can be max 1 watchdog anyway, so...
- */
-static struct mpc5200_wdt *wdt_global;
-
-
-/* helper to calculate timeout in timer counts */
-static void mpc5200_wdt_set_timeout(struct mpc5200_wdt *wdt, int timeout)
-{
- /* use biggest prescaler of 64k */
- wdt->count = (wdt->ipb_freq + 0xffff) / 0x10000 * timeout;
-
- if (wdt->count > 0xffff)
- wdt->count = 0xffff;
-}
-/* return timeout in seconds (calculated from timer count) */
-static int mpc5200_wdt_get_timeout(struct mpc5200_wdt *wdt)
-{
- return wdt->count * 0x10000 / wdt->ipb_freq;
-}
-
-
-/* watchdog operations */
-static int mpc5200_wdt_start(struct mpc5200_wdt *wdt)
-{
- spin_lock(&wdt->io_lock);
- /* disable */
- out_be32(&wdt->regs->mode, 0);
- /* set timeout, with maximum prescaler */
- out_be32(&wdt->regs->count, 0x0 | wdt->count);
- /* enable watchdog */
- out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT | GPT_MODE_MS_TIMER);
- spin_unlock(&wdt->io_lock);
-
- return 0;
-}
-static int mpc5200_wdt_ping(struct mpc5200_wdt *wdt)
-{
- spin_lock(&wdt->io_lock);
- /* writing A5 to OCPW resets the watchdog */
- out_be32(&wdt->regs->mode, 0xA5000000 | (0xffffff & in_be32(&wdt->regs->mode)));
- spin_unlock(&wdt->io_lock);
- return 0;
-}
-static int mpc5200_wdt_stop(struct mpc5200_wdt *wdt)
-{
- spin_lock(&wdt->io_lock);
- /* disable */
- out_be32(&wdt->regs->mode, 0);
- spin_unlock(&wdt->io_lock);
- return 0;
-}
-
-
-/* file operations */
-static ssize_t mpc5200_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- struct mpc5200_wdt *wdt = file->private_data;
- mpc5200_wdt_ping(wdt);
- return 0;
-}
-static struct watchdog_info mpc5200_wdt_info = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = "mpc5200 watchdog on GPT0",
-};
-static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct mpc5200_wdt *wdt = file->private_data;
- int __user *data = (int __user *)arg;
- int timeout;
- int ret = 0;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user(data, &mpc5200_wdt_info,
- sizeof(mpc5200_wdt_info));
- if (ret)
- ret = -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, data);
- break;
-
- case WDIOC_KEEPALIVE:
- mpc5200_wdt_ping(wdt);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(timeout, data);
- if (ret)
- break;
- mpc5200_wdt_set_timeout(wdt, timeout);
- mpc5200_wdt_start(wdt);
- /* fall through and return the timeout */
-
- case WDIOC_GETTIMEOUT:
- timeout = mpc5200_wdt_get_timeout(wdt);
- ret = put_user(timeout, data);
- break;
-
- default:
- ret = -ENOTTY;
- }
- return ret;
-}
-static int mpc5200_wdt_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &is_active))
- return -EBUSY;
-
- /* Set and activate the watchdog */
- mpc5200_wdt_set_timeout(wdt_global, 30);
- mpc5200_wdt_start(wdt_global);
- file->private_data = wdt_global;
- return nonseekable_open(inode, file);
-}
-static int mpc5200_wdt_release(struct inode *inode, struct file *file)
-{
-#if WATCHDOG_NOWAYOUT == 0
- struct mpc5200_wdt *wdt = file->private_data;
- mpc5200_wdt_stop(wdt);
- wdt->count = 0; /* == disabled */
-#endif
- clear_bit(0, &is_active);
- return 0;
-}
-
-static struct file_operations mpc5200_wdt_fops = {
- .owner = THIS_MODULE,
- .write = mpc5200_wdt_write,
- .ioctl = mpc5200_wdt_ioctl,
- .open = mpc5200_wdt_open,
- .release = mpc5200_wdt_release,
-};
-
-/* module operations */
-static int mpc5200_wdt_probe(struct of_device *op, const struct of_device_id *match)
-{
- struct mpc5200_wdt *wdt;
- int err;
- const void *has_wdt;
- int size;
-
- has_wdt = of_get_property(op->node, "has-wdt", NULL);
- if (!has_wdt)
- return -ENODEV;
-
- wdt = kzalloc(sizeof(*wdt), GFP_KERNEL);
- if (!wdt)
- return -ENOMEM;
-
- wdt->ipb_freq = mpc52xx_find_ipb_freq(op->node);
-
- err = of_address_to_resource(op->node, 0, &wdt->mem);
- if (err)
- goto out_free;
- size = wdt->mem.end - wdt->mem.start + 1;
- if (!request_mem_region(wdt->mem.start, size, "mpc5200_wdt")) {
- err = -ENODEV;
- goto out_free;
- }
- wdt->regs = ioremap(wdt->mem.start, size);
- if (!wdt->regs) {
- err = -ENODEV;
- goto out_release;
- }
-
- dev_set_drvdata(&op->dev, wdt);
- spin_lock_init(&wdt->io_lock);
-
- wdt->miscdev = (struct miscdevice) {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mpc5200_wdt_fops,
- .parent = &op->dev,
- };
- wdt_global = wdt;
- err = misc_register(&wdt->miscdev);
- if (!err)
- return 0;
-
- iounmap(wdt->regs);
- out_release:
- release_mem_region(wdt->mem.start, size);
- out_free:
- kfree(wdt);
- return err;
-}
-
-static int mpc5200_wdt_remove(struct of_device *op)
-{
- struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
-
- mpc5200_wdt_stop(wdt);
- misc_deregister(&wdt->miscdev);
- iounmap(wdt->regs);
- release_mem_region(wdt->mem.start, wdt->mem.end - wdt->mem.start + 1);
- kfree(wdt);
-
- return 0;
-}
-static int mpc5200_wdt_suspend(struct of_device *op, pm_message_t state)
-{
- struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
- mpc5200_wdt_stop(wdt);
- return 0;
-}
-static int mpc5200_wdt_resume(struct of_device *op)
-{
- struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
- if (wdt->count)
- mpc5200_wdt_start(wdt);
- return 0;
-}
-static int mpc5200_wdt_shutdown(struct of_device *op)
-{
- struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
- mpc5200_wdt_stop(wdt);
- return 0;
-}
-
-static struct of_device_id mpc5200_wdt_match[] = {
- { .compatible = "mpc5200-gpt", },
- {},
-};
-static struct of_platform_driver mpc5200_wdt_driver = {
- .owner = THIS_MODULE,
- .name = "mpc5200-gpt-wdt",
- .match_table = mpc5200_wdt_match,
- .probe = mpc5200_wdt_probe,
- .remove = mpc5200_wdt_remove,
- .suspend = mpc5200_wdt_suspend,
- .resume = mpc5200_wdt_resume,
- .shutdown = mpc5200_wdt_shutdown,
-};
-
-
-static int __init mpc5200_wdt_init(void)
-{
- return of_register_platform_driver(&mpc5200_wdt_driver);
-}
-
-static void __exit mpc5200_wdt_exit(void)
-{
- of_unregister_platform_driver(&mpc5200_wdt_driver);
-}
-
-module_init(mpc5200_wdt_init);
-module_exit(mpc5200_wdt_exit);
-
-MODULE_AUTHOR("Domen Puncer <domen.puncer@telargo.com>");
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * mpc83xx_wdt.c - MPC83xx watchdog userspace interface
- *
- * Authors: Dave Updegraff <dave@cray.org>
- * Kumar Gala <galak@kernel.crashing.org>
- * Attribution: from 83xx_wst: Florian Schirmer <jolt@tuxbox.org>
- * ..and from sc520_wdt
- *
- * Note: it appears that you can only actually ENABLE or DISABLE the thing
- * once after POR. Once enabled, you cannot disable, and vice versa.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/watchdog.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-struct mpc83xx_wdt {
- __be32 res0;
- __be32 swcrr; /* System watchdog control register */
-#define SWCRR_SWTC 0xFFFF0000 /* Software Watchdog Time Count. */
-#define SWCRR_SWEN 0x00000004 /* Watchdog Enable bit. */
-#define SWCRR_SWRI 0x00000002 /* Software Watchdog Reset/Interrupt Select bit.*/
-#define SWCRR_SWPR 0x00000001 /* Software Watchdog Counter Prescale bit. */
- __be32 swcnr; /* System watchdog count register */
- u8 res1[2];
- __be16 swsrr; /* System watchdog service register */
- u8 res2[0xF0];
-};
-
-static struct mpc83xx_wdt __iomem *wd_base;
-
-static u16 timeout = 0xffff;
-module_param(timeout, ushort, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in ticks. (0<timeout<65536, default=65535");
-
-static int reset = 1;
-module_param(reset, bool, 0);
-MODULE_PARM_DESC(reset, "Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset");
-
-/*
- * We always prescale, but if someone really doesn't want to they can set this
- * to 0
- */
-static int prescale = 1;
-static unsigned int timeout_sec;
-
-static unsigned long wdt_is_open;
-static spinlock_t wdt_spinlock;
-
-static void mpc83xx_wdt_keepalive(void)
-{
- /* Ping the WDT */
- spin_lock(&wdt_spinlock);
- out_be16(&wd_base->swsrr, 0x556c);
- out_be16(&wd_base->swsrr, 0xaa39);
- spin_unlock(&wdt_spinlock);
-}
-
-static ssize_t mpc83xx_wdt_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- if (count)
- mpc83xx_wdt_keepalive();
- return count;
-}
-
-static int mpc83xx_wdt_open(struct inode *inode, struct file *file)
-{
- u32 tmp = SWCRR_SWEN;
- if (test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
-
- /* Once we start the watchdog we can't stop it */
- __module_get(THIS_MODULE);
-
- /* Good, fire up the show */
- if (prescale)
- tmp |= SWCRR_SWPR;
- if (reset)
- tmp |= SWCRR_SWRI;
-
- tmp |= timeout << 16;
-
- out_be32(&wd_base->swcrr, tmp);
-
- return nonseekable_open(inode, file);
-}
-
-static int mpc83xx_wdt_release(struct inode *inode, struct file *file)
-{
- printk(KERN_CRIT "Unexpected close, not stopping watchdog!\n");
- mpc83xx_wdt_keepalive();
- clear_bit(0, &wdt_is_open);
- return 0;
-}
-
-static int mpc83xx_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = "MPC83xx",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- mpc83xx_wdt_keepalive();
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(timeout_sec, p);
- default:
- return -ENOTTY;
- }
-}
-
-static const struct file_operations mpc83xx_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = mpc83xx_wdt_write,
- .ioctl = mpc83xx_wdt_ioctl,
- .open = mpc83xx_wdt_open,
- .release = mpc83xx_wdt_release,
-};
-
-static struct miscdevice mpc83xx_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mpc83xx_wdt_fops,
-};
-
-static int __devinit mpc83xx_wdt_probe(struct platform_device *dev)
-{
- struct resource *r;
- int ret;
- unsigned int *freq = dev->dev.platform_data;
-
- /* get a pointer to the register memory */
- r = platform_get_resource(dev, IORESOURCE_MEM, 0);
-
- if (!r) {
- ret = -ENODEV;
- goto err_out;
- }
-
- wd_base = ioremap(r->start, sizeof (struct mpc83xx_wdt));
-
- if (wd_base == NULL) {
- ret = -ENOMEM;
- goto err_out;
- }
-
- ret = misc_register(&mpc83xx_wdt_miscdev);
- if (ret) {
- printk(KERN_ERR "cannot register miscdev on minor=%d "
- "(err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_unmap;
- }
-
- /* Calculate the timeout in seconds */
- if (prescale)
- timeout_sec = (timeout * 0x10000) / (*freq);
- else
- timeout_sec = timeout / (*freq);
-
- printk(KERN_INFO "WDT driver for MPC83xx initialized. "
- "mode:%s timeout=%d (%d seconds)\n",
- reset ? "reset":"interrupt", timeout, timeout_sec);
-
- spin_lock_init(&wdt_spinlock);
-
- return 0;
-
-err_unmap:
- iounmap(wd_base);
-err_out:
- return ret;
-}
-
-static int __devexit mpc83xx_wdt_remove(struct platform_device *dev)
-{
- misc_deregister(&mpc83xx_wdt_miscdev);
- iounmap(wd_base);
-
- return 0;
-}
-
-static struct platform_driver mpc83xx_wdt_driver = {
- .probe = mpc83xx_wdt_probe,
- .remove = __devexit_p(mpc83xx_wdt_remove),
- .driver = {
- .name = "mpc83xx_wdt",
- },
-};
-
-static int __init mpc83xx_wdt_init(void)
-{
- return platform_driver_register(&mpc83xx_wdt_driver);
-}
-
-static void __exit mpc83xx_wdt_exit(void)
-{
- platform_driver_unregister(&mpc83xx_wdt_driver);
-}
-
-module_init(mpc83xx_wdt_init);
-module_exit(mpc83xx_wdt_exit);
-
-MODULE_AUTHOR("Dave Updegraff, Kumar Gala");
-MODULE_DESCRIPTION("Driver for watchdog timer in MPC83xx uProcessor");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * mpc8xx_wdt.c - MPC8xx watchdog userspace interface
- *
- * Author: Florian Schirmer <jolt@tuxbox.org>
- *
- * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/watchdog.h>
-#include <asm/8xx_immap.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <syslib/m8xx_wdt.h>
-
-static unsigned long wdt_opened;
-static int wdt_status;
-
-static void mpc8xx_wdt_handler_disable(void)
-{
- volatile uint __iomem *piscr;
- piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
-
- if (!m8xx_has_internal_rtc)
- m8xx_wdt_stop_timer();
- else
- out_be32(piscr, in_be32(piscr) & ~(PISCR_PIE | PISCR_PTE));
-
- printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler deactivated\n");
-}
-
-static void mpc8xx_wdt_handler_enable(void)
-{
- volatile uint __iomem *piscr;
- piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
-
- if (!m8xx_has_internal_rtc)
- m8xx_wdt_install_timer();
- else
- out_be32(piscr, in_be32(piscr) | PISCR_PIE | PISCR_PTE);
-
- printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler activated\n");
-}
-
-static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &wdt_opened))
- return -EBUSY;
-
- m8xx_wdt_reset();
- mpc8xx_wdt_handler_disable();
-
- return nonseekable_open(inode, file);
-}
-
-static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
-{
- m8xx_wdt_reset();
-
-#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
- mpc8xx_wdt_handler_enable();
-#endif
-
- clear_bit(0, &wdt_opened);
-
- return 0;
-}
-
-static ssize_t mpc8xx_wdt_write(struct file *file, const char *data, size_t len,
- loff_t * ppos)
-{
- if (len)
- m8xx_wdt_reset();
-
- return len;
-}
-
-static int mpc8xx_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int timeout;
- static struct watchdog_info info = {
- .options = WDIOF_KEEPALIVEPING,
- .firmware_version = 0,
- .identity = "MPC8xx watchdog",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user((void *)arg, &info, sizeof(info)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if (put_user(wdt_status, (int *)arg))
- return -EFAULT;
- wdt_status &= ~WDIOF_KEEPALIVEPING;
- break;
-
- case WDIOC_GETTEMP:
- return -EOPNOTSUPP;
-
- case WDIOC_SETOPTIONS:
- return -EOPNOTSUPP;
-
- case WDIOC_KEEPALIVE:
- m8xx_wdt_reset();
- wdt_status |= WDIOF_KEEPALIVEPING;
- break;
-
- case WDIOC_SETTIMEOUT:
- return -EOPNOTSUPP;
-
- case WDIOC_GETTIMEOUT:
- timeout = m8xx_wdt_get_timeout();
- if (put_user(timeout, (int *)arg))
- return -EFAULT;
- break;
-
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-
-static const struct file_operations mpc8xx_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = mpc8xx_wdt_write,
- .ioctl = mpc8xx_wdt_ioctl,
- .open = mpc8xx_wdt_open,
- .release = mpc8xx_wdt_release,
-};
-
-static struct miscdevice mpc8xx_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mpc8xx_wdt_fops,
-};
-
-static int __init mpc8xx_wdt_init(void)
-{
- return misc_register(&mpc8xx_wdt_miscdev);
-}
-
-static void __exit mpc8xx_wdt_exit(void)
-{
- misc_deregister(&mpc8xx_wdt_miscdev);
-
- m8xx_wdt_reset();
- mpc8xx_wdt_handler_enable();
-}
-
-module_init(mpc8xx_wdt_init);
-module_exit(mpc8xx_wdt_exit);
-
-MODULE_AUTHOR("Florian Schirmer <jolt@tuxbox.org>");
-MODULE_DESCRIPTION("MPC8xx watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog driver for the mpcore watchdog timer
- *
- * (c) Copyright 2004 ARM Limited
- *
- * Based on the SoftDog driver:
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- */
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-
-#include <asm/hardware/arm_twd.h>
-#include <asm/uaccess.h>
-
-struct mpcore_wdt {
- unsigned long timer_alive;
- struct device *dev;
- void __iomem *base;
- int irq;
- unsigned int perturb;
- char expect_close;
-};
-
-static struct platform_device *mpcore_wdt_dev;
-
-extern unsigned int mpcore_timer_rate;
-
-#define TIMER_MARGIN 60
-static int mpcore_margin = TIMER_MARGIN;
-module_param(mpcore_margin, int, 0);
-MODULE_PARM_DESC(mpcore_margin, "MPcore timer margin in seconds. (0<mpcore_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-#define ONLY_TESTING 0
-static int mpcore_noboot = ONLY_TESTING;
-module_param(mpcore_noboot, int, 0);
-MODULE_PARM_DESC(mpcore_noboot, "MPcore watchdog action, set to 1 to ignore reboots, 0 to reboot (default=" __MODULE_STRING(ONLY_TESTING) ")");
-
-/*
- * This is the interrupt handler. Note that we only use this
- * in testing mode, so don't actually do a reboot here.
- */
-static irqreturn_t mpcore_wdt_fire(int irq, void *arg)
-{
- struct mpcore_wdt *wdt = arg;
-
- /* Check it really was our interrupt */
- if (readl(wdt->base + TWD_WDOG_INTSTAT)) {
- dev_printk(KERN_CRIT, wdt->dev, "Triggered - Reboot ignored.\n");
-
- /* Clear the interrupt on the watchdog */
- writel(1, wdt->base + TWD_WDOG_INTSTAT);
-
- return IRQ_HANDLED;
- }
-
- return IRQ_NONE;
-}
-
-/*
- * mpcore_wdt_keepalive - reload the timer
- *
- * Note that the spec says a DIFFERENT value must be written to the reload
- * register each time. The "perturb" variable deals with this by adding 1
- * to the count every other time the function is called.
- */
-static void mpcore_wdt_keepalive(struct mpcore_wdt *wdt)
-{
- unsigned int count;
-
- /* Assume prescale is set to 256 */
- count = (mpcore_timer_rate / 256) * mpcore_margin;
-
- /* Reload the counter */
- writel(count + wdt->perturb, wdt->base + TWD_WDOG_LOAD);
-
- wdt->perturb = wdt->perturb ? 0 : 1;
-}
-
-static void mpcore_wdt_stop(struct mpcore_wdt *wdt)
-{
- writel(0x12345678, wdt->base + TWD_WDOG_DISABLE);
- writel(0x87654321, wdt->base + TWD_WDOG_DISABLE);
- writel(0x0, wdt->base + TWD_WDOG_CONTROL);
-}
-
-static void mpcore_wdt_start(struct mpcore_wdt *wdt)
-{
- dev_printk(KERN_INFO, wdt->dev, "enabling watchdog.\n");
-
- /* This loads the count register but does NOT start the count yet */
- mpcore_wdt_keepalive(wdt);
-
- if (mpcore_noboot) {
- /* Enable watchdog - prescale=256, watchdog mode=0, enable=1 */
- writel(0x0000FF01, wdt->base + TWD_WDOG_CONTROL);
- } else {
- /* Enable watchdog - prescale=256, watchdog mode=1, enable=1 */
- writel(0x0000FF09, wdt->base + TWD_WDOG_CONTROL);
- }
-}
-
-static int mpcore_wdt_set_heartbeat(int t)
-{
- if (t < 0x0001 || t > 0xFFFF)
- return -EINVAL;
-
- mpcore_margin = t;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-static int mpcore_wdt_open(struct inode *inode, struct file *file)
-{
- struct mpcore_wdt *wdt = platform_get_drvdata(mpcore_wdt_dev);
-
- if (test_and_set_bit(0, &wdt->timer_alive))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- file->private_data = wdt;
-
- /*
- * Activate timer
- */
- mpcore_wdt_start(wdt);
-
- return nonseekable_open(inode, file);
-}
-
-static int mpcore_wdt_release(struct inode *inode, struct file *file)
-{
- struct mpcore_wdt *wdt = file->private_data;
-
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
- if (wdt->expect_close == 42) {
- mpcore_wdt_stop(wdt);
- } else {
- dev_printk(KERN_CRIT, wdt->dev, "unexpected close, not stopping watchdog!\n");
- mpcore_wdt_keepalive(wdt);
- }
- clear_bit(0, &wdt->timer_alive);
- wdt->expect_close = 0;
- return 0;
-}
-
-static ssize_t mpcore_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- struct mpcore_wdt *wdt = file->private_data;
-
- /*
- * Refresh the timer.
- */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- wdt->expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- wdt->expect_close = 42;
- }
- }
- mpcore_wdt_keepalive(wdt);
- }
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .identity = "MPcore Watchdog",
-};
-
-static int mpcore_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct mpcore_wdt *wdt = file->private_data;
- int ret;
- union {
- struct watchdog_info ident;
- int i;
- } uarg;
-
- if (_IOC_DIR(cmd) && _IOC_SIZE(cmd) > sizeof(uarg))
- return -ENOTTY;
-
- if (_IOC_DIR(cmd) & _IOC_WRITE) {
- ret = copy_from_user(&uarg, (void __user *)arg, _IOC_SIZE(cmd));
- if (ret)
- return -EFAULT;
- }
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- uarg.ident = ident;
- ret = 0;
- break;
-
- case WDIOC_SETOPTIONS:
- ret = -EINVAL;
- if (uarg.i & WDIOS_DISABLECARD) {
- mpcore_wdt_stop(wdt);
- ret = 0;
- }
- if (uarg.i & WDIOS_ENABLECARD) {
- mpcore_wdt_start(wdt);
- ret = 0;
- }
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- uarg.i = 0;
- ret = 0;
- break;
-
- case WDIOC_KEEPALIVE:
- mpcore_wdt_keepalive(wdt);
- ret = 0;
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = mpcore_wdt_set_heartbeat(uarg.i);
- if (ret)
- break;
-
- mpcore_wdt_keepalive(wdt);
- /* Fall */
- case WDIOC_GETTIMEOUT:
- uarg.i = mpcore_margin;
- ret = 0;
- break;
-
- default:
- return -ENOTTY;
- }
-
- if (ret == 0 && _IOC_DIR(cmd) & _IOC_READ) {
- ret = copy_to_user((void __user *)arg, &uarg, _IOC_SIZE(cmd));
- if (ret)
- ret = -EFAULT;
- }
- return ret;
-}
-
-/*
- * System shutdown handler. Turn off the watchdog if we're
- * restarting or halting the system.
- */
-static void mpcore_wdt_shutdown(struct platform_device *dev)
-{
- struct mpcore_wdt *wdt = platform_get_drvdata(dev);
-
- if (system_state == SYSTEM_RESTART || system_state == SYSTEM_HALT)
- mpcore_wdt_stop(wdt);
-}
-
-/*
- * Kernel Interfaces
- */
-static const struct file_operations mpcore_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = mpcore_wdt_write,
- .ioctl = mpcore_wdt_ioctl,
- .open = mpcore_wdt_open,
- .release = mpcore_wdt_release,
-};
-
-static struct miscdevice mpcore_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mpcore_wdt_fops,
-};
-
-static int __devinit mpcore_wdt_probe(struct platform_device *dev)
-{
- struct mpcore_wdt *wdt;
- struct resource *res;
- int ret;
-
- /* We only accept one device, and it must have an id of -1 */
- if (dev->id != -1)
- return -ENODEV;
-
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENODEV;
- goto err_out;
- }
-
- wdt = kzalloc(sizeof(struct mpcore_wdt), GFP_KERNEL);
- if (!wdt) {
- ret = -ENOMEM;
- goto err_out;
- }
-
- wdt->dev = &dev->dev;
- wdt->irq = platform_get_irq(dev, 0);
- if (wdt->irq < 0) {
- ret = -ENXIO;
- goto err_free;
- }
- wdt->base = ioremap(res->start, res->end - res->start + 1);
- if (!wdt->base) {
- ret = -ENOMEM;
- goto err_free;
- }
-
- mpcore_wdt_miscdev.parent = &dev->dev;
- ret = misc_register(&mpcore_wdt_miscdev);
- if (ret) {
- dev_printk(KERN_ERR, _dev, "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_misc;
- }
-
- ret = request_irq(wdt->irq, mpcore_wdt_fire, IRQF_DISABLED, "mpcore_wdt", wdt);
- if (ret) {
- dev_printk(KERN_ERR, _dev, "cannot register IRQ%d for watchdog\n", wdt->irq);
- goto err_irq;
- }
-
- mpcore_wdt_stop(wdt);
- platform_set_drvdata(&dev->dev, wdt);
- mpcore_wdt_dev = dev;
-
- return 0;
-
- err_irq:
- misc_deregister(&mpcore_wdt_miscdev);
- err_misc:
- iounmap(wdt->base);
- err_free:
- kfree(wdt);
- err_out:
- return ret;
-}
-
-static int __devexit mpcore_wdt_remove(struct platform_device *dev)
-{
- struct mpcore_wdt *wdt = platform_get_drvdata(dev);
-
- platform_set_drvdata(dev, NULL);
-
- misc_deregister(&mpcore_wdt_miscdev);
-
- mpcore_wdt_dev = NULL;
-
- free_irq(wdt->irq, wdt);
- iounmap(wdt->base);
- kfree(wdt);
- return 0;
-}
-
-static struct platform_driver mpcore_wdt_driver = {
- .probe = mpcore_wdt_probe,
- .remove = __devexit_p(mpcore_wdt_remove),
- .shutdown = mpcore_wdt_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = "mpcore_wdt",
- },
-};
-
-static char banner[] __initdata = KERN_INFO "MPcore Watchdog Timer: 0.1. mpcore_noboot=%d mpcore_margin=%d sec (nowayout= %d)\n";
-
-static int __init mpcore_wdt_init(void)
-{
- /*
- * Check that the margin value is within it's range;
- * if not reset to the default
- */
- if (mpcore_wdt_set_heartbeat(mpcore_margin)) {
- mpcore_wdt_set_heartbeat(TIMER_MARGIN);
- printk(KERN_INFO "mpcore_margin value must be 0<mpcore_margin<65536, using %d\n",
- TIMER_MARGIN);
- }
-
- printk(banner, mpcore_noboot, mpcore_margin, nowayout);
-
- return platform_driver_register(&mpcore_wdt_driver);
-}
-
-static void __exit mpcore_wdt_exit(void)
-{
- platform_driver_unregister(&mpcore_wdt_driver);
-}
-
-module_init(mpcore_wdt_init);
-module_exit(mpcore_wdt_exit);
-
-MODULE_AUTHOR("ARM Limited");
-MODULE_DESCRIPTION("MPcore Watchdog Device Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Driver for the MTX-1 Watchdog.
- *
- * (C) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved.
- * http://www.4g-systems.biz
- *
- * (C) Copyright 2007 OpenWrt.org, Florian Fainelli <florian@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Michael Stickel nor 4G Systems admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 2005 4G Systems <info@4g-systems.biz>
- *
- * Release 0.01.
- * Author: Michael Stickel michael.stickel@4g-systems.biz
- *
- * Release 0.02.
- * Author: Florian Fainelli florian@openwrt.org
- * use the Linux watchdog/timer APIs
- *
- * The Watchdog is configured to reset the MTX-1
- * if it is not triggered for 100 seconds.
- * It should not be triggered more often than 1.6 seconds.
- *
- * A timer triggers the watchdog every 5 seconds, until
- * it is opened for the first time. After the first open
- * it MUST be triggered every 2..95 seconds.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/miscdevice.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/timer.h>
-#include <linux/completion.h>
-#include <linux/jiffies.h>
-#include <linux/watchdog.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include <asm/mach-au1x00/au1000.h>
-
-#define MTX1_WDT_INTERVAL (5 * HZ)
-
-static int ticks = 100 * HZ;
-
-static struct {
- struct completion stop;
- volatile int running;
- struct timer_list timer;
- volatile int queue;
- int default_ticks;
- unsigned long inuse;
-} mtx1_wdt_device;
-
-static void mtx1_wdt_trigger(unsigned long unused)
-{
- u32 tmp;
-
- if (mtx1_wdt_device.running)
- ticks--;
- /*
- * toggle GPIO2_15
- */
- tmp = au_readl(GPIO2_DIR);
- tmp = (tmp & ~(1<<15)) | ((~tmp) & (1<<15));
- au_writel (tmp, GPIO2_DIR);
-
- if (mtx1_wdt_device.queue && ticks)
- mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
- else {
- complete(&mtx1_wdt_device.stop);
- }
-}
-
-static void mtx1_wdt_reset(void)
-{
- ticks = mtx1_wdt_device.default_ticks;
-}
-
-
-static void mtx1_wdt_start(void)
-{
- if (!mtx1_wdt_device.queue) {
- mtx1_wdt_device.queue = 1;
- au_writel (au_readl(GPIO2_DIR) | (u32)(1<<15), GPIO2_DIR);
- mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
- }
- mtx1_wdt_device.running++;
-}
-
-static int mtx1_wdt_stop(void)
-{
- if (mtx1_wdt_device.queue) {
- mtx1_wdt_device.queue = 0;
- au_writel (au_readl(GPIO2_DIR) & ~((u32)(1<<15)), GPIO2_DIR);
- }
-
- ticks = mtx1_wdt_device.default_ticks;
-
- return 0;
-}
-
-/* Filesystem functions */
-
-static int mtx1_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &mtx1_wdt_device.inuse))
- return -EBUSY;
-
- return nonseekable_open(inode, file);
-}
-
-
-static int mtx1_wdt_release(struct inode *inode, struct file *file)
-{
- clear_bit(0, &mtx1_wdt_device.inuse);
- return 0;
-}
-
-static int mtx1_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- unsigned int value;
- static struct watchdog_info ident =
- {
- .options = WDIOF_CARDRESET,
- .identity = "MTX-1 WDT",
- };
-
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- mtx1_wdt_reset();
- break;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETSUPPORT:
- if ( copy_to_user(argp, &ident, sizeof(ident)) )
- return -EFAULT;
- break;
- case WDIOC_SETOPTIONS:
- if ( copy_from_user(&value, argp, sizeof(int)) )
- return -EFAULT;
- switch(value) {
- case WDIOS_ENABLECARD:
- mtx1_wdt_start();
- break;
- case WDIOS_DISABLECARD:
- return mtx1_wdt_stop();
- default:
- return -EINVAL;
- }
- break;
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-
-static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
-{
- if (!count)
- return -EIO;
-
- mtx1_wdt_reset();
- return count;
-}
-
-static struct file_operations mtx1_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = mtx1_wdt_ioctl,
- .open = mtx1_wdt_open,
- .write = mtx1_wdt_write,
- .release = mtx1_wdt_release
-};
-
-
-static struct miscdevice mtx1_wdt_misc = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mtx1_wdt_fops
-};
-
-
-static int __init mtx1_wdt_init(void)
-{
- int ret;
-
- if ((ret = misc_register(&mtx1_wdt_misc)) < 0) {
- printk(KERN_ERR " mtx-1_wdt : failed to register\n");
- return ret;
- }
-
- init_completion(&mtx1_wdt_device.stop);
- mtx1_wdt_device.queue = 0;
-
- clear_bit(0, &mtx1_wdt_device.inuse);
-
- setup_timer(&mtx1_wdt_device.timer, mtx1_wdt_trigger, 0L);
-
- mtx1_wdt_device.default_ticks = ticks;
-
- mtx1_wdt_start();
-
- printk(KERN_INFO "MTX-1 Watchdog driver\n");
-
- return 0;
-}
-
-static void __exit mtx1_wdt_exit(void)
-{
- if (mtx1_wdt_device.queue) {
- mtx1_wdt_device.queue = 0;
- wait_for_completion(&mtx1_wdt_device.stop);
- }
- misc_deregister(&mtx1_wdt_misc);
-}
-
-module_init(mtx1_wdt_init);
-module_exit(mtx1_wdt_exit);
-
-MODULE_AUTHOR("Michael Stickel, Florian Fainelli");
-MODULE_DESCRIPTION("Driver for the MTX-1 watchdog");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * mv64x60_wdt.c - MV64X60 (Marvell Discovery) watchdog userspace interface
- *
- * Author: James Chapman <jchapman@katalix.com>
- *
- * Platform-specific setup code should configure the dog to generate
- * interrupt or reset as required. This code only enables/disables
- * and services the watchdog.
- *
- * Derived from mpc8xx_wdt.c, with the following copyright.
- *
- * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/watchdog.h>
-#include <linux/platform_device.h>
-
-#include <linux/mv643xx.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define MV64x60_WDT_WDC_OFFSET 0
-
-/*
- * The watchdog configuration register contains a pair of 2-bit fields,
- * 1. a reload field, bits 27-26, which triggers a reload of
- * the countdown register, and
- * 2. an enable field, bits 25-24, which toggles between
- * enabling and disabling the watchdog timer.
- * Bit 31 is a read-only field which indicates whether the
- * watchdog timer is currently enabled.
- *
- * The low 24 bits contain the timer reload value.
- */
-#define MV64x60_WDC_ENABLE_SHIFT 24
-#define MV64x60_WDC_SERVICE_SHIFT 26
-#define MV64x60_WDC_ENABLED_SHIFT 31
-
-#define MV64x60_WDC_ENABLED_TRUE 1
-#define MV64x60_WDC_ENABLED_FALSE 0
-
-/* Flags bits */
-#define MV64x60_WDOG_FLAG_OPENED 0
-
-static unsigned long wdt_flags;
-static int wdt_status;
-static void __iomem *mv64x60_wdt_regs;
-static int mv64x60_wdt_timeout;
-static int mv64x60_wdt_count;
-static unsigned int bus_clk;
-static char expect_close;
-static DEFINE_SPINLOCK(mv64x60_wdt_spinlock);
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static int mv64x60_wdt_toggle_wdc(int enabled_predicate, int field_shift)
-{
- u32 data;
- u32 enabled;
- int ret = 0;
-
- spin_lock(&mv64x60_wdt_spinlock);
- data = readl(mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
- enabled = (data >> MV64x60_WDC_ENABLED_SHIFT) & 1;
-
- /* only toggle the requested field if enabled state matches predicate */
- if ((enabled ^ enabled_predicate) == 0) {
- /* We write a 1, then a 2 -- to the appropriate field */
- data = (1 << field_shift) | mv64x60_wdt_count;
- writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
-
- data = (2 << field_shift) | mv64x60_wdt_count;
- writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
- ret = 1;
- }
- spin_unlock(&mv64x60_wdt_spinlock);
-
- return ret;
-}
-
-static void mv64x60_wdt_service(void)
-{
- mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE,
- MV64x60_WDC_SERVICE_SHIFT);
-}
-
-static void mv64x60_wdt_handler_enable(void)
-{
- if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_FALSE,
- MV64x60_WDC_ENABLE_SHIFT)) {
- mv64x60_wdt_service();
- printk(KERN_NOTICE "mv64x60_wdt: watchdog activated\n");
- }
-}
-
-static void mv64x60_wdt_handler_disable(void)
-{
- if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE,
- MV64x60_WDC_ENABLE_SHIFT))
- printk(KERN_NOTICE "mv64x60_wdt: watchdog deactivated\n");
-}
-
-static void mv64x60_wdt_set_timeout(unsigned int timeout)
-{
- /* maximum bus cycle count is 0xFFFFFFFF */
- if (timeout > 0xFFFFFFFF / bus_clk)
- timeout = 0xFFFFFFFF / bus_clk;
-
- mv64x60_wdt_count = timeout * bus_clk >> 8;
- mv64x60_wdt_timeout = timeout;
-}
-
-static int mv64x60_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- mv64x60_wdt_handler_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static int mv64x60_wdt_release(struct inode *inode, struct file *file)
-{
- if (expect_close == 42)
- mv64x60_wdt_handler_disable();
- else {
- printk(KERN_CRIT
- "mv64x60_wdt: unexpected close, not stopping timer!\n");
- mv64x60_wdt_service();
- }
- expect_close = 0;
-
- clear_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags);
-
- return 0;
-}
-
-static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
- if(get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- mv64x60_wdt_service();
- }
-
- return len;
-}
-
-static int mv64x60_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int timeout;
- int options;
- void __user *argp = (void __user *)arg;
- static struct watchdog_info info = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE |
- WDIOF_KEEPALIVEPING,
- .firmware_version = 0,
- .identity = "MV64x60 watchdog",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &info, sizeof(info)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if (put_user(wdt_status, (int __user *)argp))
- return -EFAULT;
- wdt_status &= ~WDIOF_KEEPALIVEPING;
- break;
-
- case WDIOC_GETTEMP:
- return -EOPNOTSUPP;
-
- case WDIOC_SETOPTIONS:
- if (get_user(options, (int __user *)argp))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD)
- mv64x60_wdt_handler_disable();
-
- if (options & WDIOS_ENABLECARD)
- mv64x60_wdt_handler_enable();
- break;
-
- case WDIOC_KEEPALIVE:
- mv64x60_wdt_service();
- wdt_status |= WDIOF_KEEPALIVEPING;
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(timeout, (int __user *)argp))
- return -EFAULT;
- mv64x60_wdt_set_timeout(timeout);
- /* Fall through */
-
- case WDIOC_GETTIMEOUT:
- if (put_user(mv64x60_wdt_timeout, (int __user *)argp))
- return -EFAULT;
- break;
-
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-
-static const struct file_operations mv64x60_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = mv64x60_wdt_write,
- .ioctl = mv64x60_wdt_ioctl,
- .open = mv64x60_wdt_open,
- .release = mv64x60_wdt_release,
-};
-
-static struct miscdevice mv64x60_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &mv64x60_wdt_fops,
-};
-
-static int __devinit mv64x60_wdt_probe(struct platform_device *dev)
-{
- struct mv64x60_wdt_pdata *pdata = dev->dev.platform_data;
- struct resource *r;
- int timeout = 10;
-
- bus_clk = 133; /* in MHz */
- if (pdata) {
- timeout = pdata->timeout;
- bus_clk = pdata->bus_clk;
- }
-
- /* Since bus_clk is truncated MHz, actual frequency could be
- * up to 1MHz higher. Round up, since it's better to time out
- * too late than too soon.
- */
- bus_clk++;
- bus_clk *= 1000000; /* convert to Hz */
-
- r = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!r)
- return -ENODEV;
-
- mv64x60_wdt_regs = ioremap(r->start, r->end - r->start + 1);
- if (mv64x60_wdt_regs == NULL)
- return -ENOMEM;
-
- mv64x60_wdt_set_timeout(timeout);
-
- mv64x60_wdt_handler_disable(); /* in case timer was already running */
-
- return misc_register(&mv64x60_wdt_miscdev);
-}
-
-static int __devexit mv64x60_wdt_remove(struct platform_device *dev)
-{
- misc_deregister(&mv64x60_wdt_miscdev);
-
- mv64x60_wdt_handler_disable();
-
- iounmap(mv64x60_wdt_regs);
-
- return 0;
-}
-
-static struct platform_driver mv64x60_wdt_driver = {
- .probe = mv64x60_wdt_probe,
- .remove = __devexit_p(mv64x60_wdt_remove),
- .driver = {
- .owner = THIS_MODULE,
- .name = MV64x60_WDT_NAME,
- },
-};
-
-static int __init mv64x60_wdt_init(void)
-{
- printk(KERN_INFO "MV64x60 watchdog driver\n");
-
- return platform_driver_register(&mv64x60_wdt_driver);
-}
-
-static void __exit mv64x60_wdt_exit(void)
-{
- platform_driver_unregister(&mv64x60_wdt_driver);
-}
-
-module_init(mv64x60_wdt_init);
-module_exit(mv64x60_wdt_exit);
-
-MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
-MODULE_DESCRIPTION("MV64x60 watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * linux/drivers/char/watchdog/omap_wdt.c
- *
- * Watchdog driver for the TI OMAP 16xx & 24xx 32KHz (non-secure) watchdog
- *
- * Author: MontaVista Software, Inc.
- * <gdavis@mvista.com> or <source@mvista.com>
- *
- * 2003 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * History:
- *
- * 20030527: George G. Davis <gdavis@mvista.com>
- * Initially based on linux-2.4.19-rmk7-pxa1/drivers/char/sa1100_wdt.c
- * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
- * Based on SoftDog driver by Alan Cox <alan@redhat.com>
- *
- * Copyright (c) 2004 Texas Instruments.
- * 1. Modified to support OMAP1610 32-KHz watchdog timer
- * 2. Ported to 2.6 kernel
- *
- * Copyright (c) 2005 David Brownell
- * Use the driver model and standard identifiers; handle bigger timeouts.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/moduleparam.h>
-#include <linux/clk.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/hardware.h>
-#include <asm/bitops.h>
-
-#include <asm/arch/prcm.h>
-
-#include "omap_wdt.h"
-
-static unsigned timer_margin;
-module_param(timer_margin, uint, 0);
-MODULE_PARM_DESC(timer_margin, "initial watchdog timeout (in seconds)");
-
-static int omap_wdt_users;
-static struct clk *armwdt_ck = NULL;
-static struct clk *mpu_wdt_ick = NULL;
-static struct clk *mpu_wdt_fck = NULL;
-
-static unsigned int wdt_trgr_pattern = 0x1234;
-
-static void omap_wdt_ping(void)
-{
- /* wait for posted write to complete */
- while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
- cpu_relax();
- wdt_trgr_pattern = ~wdt_trgr_pattern;
- omap_writel(wdt_trgr_pattern, (OMAP_WATCHDOG_TGR));
- /* wait for posted write to complete */
- while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
- cpu_relax();
- /* reloaded WCRR from WLDR */
-}
-
-static void omap_wdt_enable(void)
-{
- /* Sequence to enable the watchdog */
- omap_writel(0xBBBB, OMAP_WATCHDOG_SPR);
- while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
- cpu_relax();
- omap_writel(0x4444, OMAP_WATCHDOG_SPR);
- while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
- cpu_relax();
-}
-
-static void omap_wdt_disable(void)
-{
- /* sequence required to disable watchdog */
- omap_writel(0xAAAA, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
- cpu_relax();
- omap_writel(0x5555, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
- cpu_relax();
-}
-
-static void omap_wdt_adjust_timeout(unsigned new_timeout)
-{
- if (new_timeout < TIMER_MARGIN_MIN)
- new_timeout = TIMER_MARGIN_DEFAULT;
- if (new_timeout > TIMER_MARGIN_MAX)
- new_timeout = TIMER_MARGIN_MAX;
- timer_margin = new_timeout;
-}
-
-static void omap_wdt_set_timeout(void)
-{
- u32 pre_margin = GET_WLDR_VAL(timer_margin);
-
- /* just count up at 32 KHz */
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
- cpu_relax();
- omap_writel(pre_margin, OMAP_WATCHDOG_LDR);
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
- cpu_relax();
-}
-
-/*
- * Allow only one task to hold it open
- */
-
-static int omap_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(1, (unsigned long *)&omap_wdt_users))
- return -EBUSY;
-
- if (cpu_is_omap16xx())
- clk_enable(armwdt_ck); /* Enable the clock */
-
- if (cpu_is_omap24xx()) {
- clk_enable(mpu_wdt_ick); /* Enable the interface clock */
- clk_enable(mpu_wdt_fck); /* Enable the functional clock */
- }
-
- /* initialize prescaler */
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
- cpu_relax();
- omap_writel((1 << 5) | (PTV << 2), OMAP_WATCHDOG_CNTRL);
- while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
- cpu_relax();
-
- omap_wdt_set_timeout();
- omap_wdt_enable();
- return nonseekable_open(inode, file);
-}
-
-static int omap_wdt_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer unless NOWAYOUT is defined.
- */
-#ifndef CONFIG_WATCHDOG_NOWAYOUT
- omap_wdt_disable();
-
- if (cpu_is_omap16xx()) {
- clk_disable(armwdt_ck); /* Disable the clock */
- clk_put(armwdt_ck);
- armwdt_ck = NULL;
- }
-
- if (cpu_is_omap24xx()) {
- clk_disable(mpu_wdt_ick); /* Disable the clock */
- clk_disable(mpu_wdt_fck); /* Disable the clock */
- clk_put(mpu_wdt_ick);
- clk_put(mpu_wdt_fck);
- mpu_wdt_ick = NULL;
- mpu_wdt_fck = NULL;
- }
-#else
- printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
-#endif
- omap_wdt_users = 0;
- return 0;
-}
-
-static ssize_t
-omap_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* Refresh LOAD_TIME. */
- if (len)
- omap_wdt_ping();
- return len;
-}
-
-static int
-omap_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_margin;
- static struct watchdog_info ident = {
- .identity = "OMAP Watchdog",
- .options = WDIOF_SETTIMEOUT,
- .firmware_version = 0,
- };
-
- switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user((struct watchdog_info __user *)arg, &ident,
- sizeof(ident));
- case WDIOC_GETSTATUS:
- return put_user(0, (int __user *)arg);
- case WDIOC_GETBOOTSTATUS:
- if (cpu_is_omap16xx())
- return put_user(omap_readw(ARM_SYSST),
- (int __user *)arg);
- if (cpu_is_omap24xx())
- return put_user(omap_prcm_get_reset_sources(),
- (int __user *)arg);
- case WDIOC_KEEPALIVE:
- omap_wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, (int __user *)arg))
- return -EFAULT;
- omap_wdt_adjust_timeout(new_margin);
-
- omap_wdt_disable();
- omap_wdt_set_timeout();
- omap_wdt_enable();
-
- omap_wdt_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timer_margin, (int __user *)arg);
- }
-}
-
-static const struct file_operations omap_wdt_fops = {
- .owner = THIS_MODULE,
- .write = omap_wdt_write,
- .ioctl = omap_wdt_ioctl,
- .open = omap_wdt_open,
- .release = omap_wdt_release,
-};
-
-static struct miscdevice omap_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &omap_wdt_fops
-};
-
-static int __init omap_wdt_probe(struct platform_device *pdev)
-{
- struct resource *res, *mem;
- int ret;
-
- /* reserve static register mappings */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENOENT;
-
- mem = request_mem_region(res->start, res->end - res->start + 1,
- pdev->name);
- if (mem == NULL)
- return -EBUSY;
-
- platform_set_drvdata(pdev, mem);
-
- omap_wdt_users = 0;
-
- if (cpu_is_omap16xx()) {
- armwdt_ck = clk_get(&pdev->dev, "armwdt_ck");
- if (IS_ERR(armwdt_ck)) {
- ret = PTR_ERR(armwdt_ck);
- armwdt_ck = NULL;
- goto fail;
- }
- }
-
- if (cpu_is_omap24xx()) {
- mpu_wdt_ick = clk_get(&pdev->dev, "mpu_wdt_ick");
- if (IS_ERR(mpu_wdt_ick)) {
- ret = PTR_ERR(mpu_wdt_ick);
- mpu_wdt_ick = NULL;
- goto fail;
- }
- mpu_wdt_fck = clk_get(&pdev->dev, "mpu_wdt_fck");
- if (IS_ERR(mpu_wdt_fck)) {
- ret = PTR_ERR(mpu_wdt_fck);
- mpu_wdt_fck = NULL;
- goto fail;
- }
- }
-
- omap_wdt_disable();
- omap_wdt_adjust_timeout(timer_margin);
-
- omap_wdt_miscdev.parent = &pdev->dev;
- ret = misc_register(&omap_wdt_miscdev);
- if (ret)
- goto fail;
-
- pr_info("OMAP Watchdog Timer: initial timeout %d sec\n", timer_margin);
-
- /* autogate OCP interface clock */
- omap_writel(0x01, OMAP_WATCHDOG_SYS_CONFIG);
- return 0;
-
-fail:
- if (armwdt_ck)
- clk_put(armwdt_ck);
- if (mpu_wdt_ick)
- clk_put(mpu_wdt_ick);
- if (mpu_wdt_fck)
- clk_put(mpu_wdt_fck);
- release_resource(mem);
- return ret;
-}
-
-static void omap_wdt_shutdown(struct platform_device *pdev)
-{
- omap_wdt_disable();
-}
-
-static int omap_wdt_remove(struct platform_device *pdev)
-{
- struct resource *mem = platform_get_drvdata(pdev);
- misc_deregister(&omap_wdt_miscdev);
- release_resource(mem);
- if (armwdt_ck)
- clk_put(armwdt_ck);
- if (mpu_wdt_ick)
- clk_put(mpu_wdt_ick);
- if (mpu_wdt_fck)
- clk_put(mpu_wdt_fck);
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-/* REVISIT ... not clear this is the best way to handle system suspend; and
- * it's very inappropriate for selective device suspend (e.g. suspending this
- * through sysfs rather than by stopping the watchdog daemon). Also, this
- * may not play well enough with NOWAYOUT...
- */
-
-static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state)
-{
- if (omap_wdt_users)
- omap_wdt_disable();
- return 0;
-}
-
-static int omap_wdt_resume(struct platform_device *pdev)
-{
- if (omap_wdt_users) {
- omap_wdt_enable();
- omap_wdt_ping();
- }
- return 0;
-}
-
-#else
-#define omap_wdt_suspend NULL
-#define omap_wdt_resume NULL
-#endif
-
-static struct platform_driver omap_wdt_driver = {
- .probe = omap_wdt_probe,
- .remove = omap_wdt_remove,
- .shutdown = omap_wdt_shutdown,
- .suspend = omap_wdt_suspend,
- .resume = omap_wdt_resume,
- .driver = {
- .owner = THIS_MODULE,
- .name = "omap_wdt",
- },
-};
-
-static int __init omap_wdt_init(void)
-{
- return platform_driver_register(&omap_wdt_driver);
-}
-
-static void __exit omap_wdt_exit(void)
-{
- platform_driver_unregister(&omap_wdt_driver);
-}
-
-module_init(omap_wdt_init);
-module_exit(omap_wdt_exit);
-
-MODULE_AUTHOR("George G. Davis");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * linux/drivers/char/watchdog/omap_wdt.h
- *
- * BRIEF MODULE DESCRIPTION
- * OMAP Watchdog timer register definitions
- *
- * Copyright (C) 2004 Texas Instruments.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef _OMAP_WATCHDOG_H
-#define _OMAP_WATCHDOG_H
-
-#define OMAP1610_WATCHDOG_BASE 0xfffeb000
-#define OMAP2420_WATCHDOG_BASE 0x48022000 /*WDT Timer 2 */
-
-#ifdef CONFIG_ARCH_OMAP24XX
-#define OMAP_WATCHDOG_BASE OMAP2420_WATCHDOG_BASE
-#else
-#define OMAP_WATCHDOG_BASE OMAP1610_WATCHDOG_BASE
-#define RM_RSTST_WKUP 0
-#endif
-
-#define OMAP_WATCHDOG_REV (OMAP_WATCHDOG_BASE + 0x00)
-#define OMAP_WATCHDOG_SYS_CONFIG (OMAP_WATCHDOG_BASE + 0x10)
-#define OMAP_WATCHDOG_STATUS (OMAP_WATCHDOG_BASE + 0x14)
-#define OMAP_WATCHDOG_CNTRL (OMAP_WATCHDOG_BASE + 0x24)
-#define OMAP_WATCHDOG_CRR (OMAP_WATCHDOG_BASE + 0x28)
-#define OMAP_WATCHDOG_LDR (OMAP_WATCHDOG_BASE + 0x2c)
-#define OMAP_WATCHDOG_TGR (OMAP_WATCHDOG_BASE + 0x30)
-#define OMAP_WATCHDOG_WPS (OMAP_WATCHDOG_BASE + 0x34)
-#define OMAP_WATCHDOG_SPR (OMAP_WATCHDOG_BASE + 0x48)
-
-/* Using the prescaler, the OMAP watchdog could go for many
- * months before firing. These limits work without scaling,
- * with the 60 second default assumed by most tools and docs.
- */
-#define TIMER_MARGIN_MAX (24 * 60 * 60) /* 1 day */
-#define TIMER_MARGIN_DEFAULT 60 /* 60 secs */
-#define TIMER_MARGIN_MIN 1
-
-#define PTV 0 /* prescale */
-#define GET_WLDR_VAL(secs) (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
-
-#endif /* _OMAP_WATCHDOG_H */
+++ /dev/null
-/*
- * NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x
- *
- * This code is based on wdt.c with original copyright.
- *
- * (C) Copyright 2006 Sven Anders, <anders@anduras.de>
- * and Marcus Junker, <junker@anduras.de>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Sven Anders, Marcus Junker nor ANDURAS AG
- * admit liability nor provide warranty for any of this software.
- * This material is provided "AS-IS" and at no charge.
- *
- * Release 1.1
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/notifier.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-#include <linux/version.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/* #define DEBUG 1 */
-
-#define DEFAULT_TIMEOUT 1 /* 1 minute */
-#define MAX_TIMEOUT 255
-
-#define VERSION "1.1"
-#define MODNAME "pc87413 WDT"
-#define PFX MODNAME ": "
-#define DPFX MODNAME " - DEBUG: "
-
-#define WDT_INDEX_IO_PORT (io+0) /* I/O port base (index register) */
-#define WDT_DATA_IO_PORT (WDT_INDEX_IO_PORT+1)
-#define SWC_LDN 0x04
-#define SIOCFG2 0x22 /* Serial IO register */
-#define WDCTL 0x10 /* Watchdog-Timer-Controll-Register */
-#define WDTO 0x11 /* Watchdog timeout register */
-#define WDCFG 0x12 /* Watchdog config register */
-
-static int io = 0x2E; /* Address used on Portwell Boards */
-
-static int timeout = DEFAULT_TIMEOUT; /* timeout value */
-static unsigned long timer_enabled = 0; /* is the timer enabled? */
-
-static char expect_close; /* is the close expected? */
-
-static spinlock_t io_lock; /* to guard the watchdog from io races */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-/* -- Low level function ----------------------------------------*/
-
-/* Select pins for Watchdog output */
-
-static inline void pc87413_select_wdt_out (void)
-{
- unsigned int cr_data = 0;
-
- /* Step 1: Select multiple pin,pin55,as WDT output */
-
- outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
-
- cr_data = inb (WDT_DATA_IO_PORT);
-
- cr_data |= 0x80; /* Set Bit7 to 1*/
- outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
-
- outb_p(cr_data, WDT_DATA_IO_PORT);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Select multiple pin,pin55,as WDT output:"
- " Bit7 to 1: %d\n", cr_data);
-#endif
-}
-
-/* Enable SWC functions */
-
-static inline void pc87413_enable_swc(void)
-{
- unsigned int cr_data=0;
-
- /* Step 2: Enable SWC functions */
-
- outb_p(0x07, WDT_INDEX_IO_PORT); /* Point SWC_LDN (LDN=4) */
- outb_p(SWC_LDN, WDT_DATA_IO_PORT);
-
- outb_p(0x30, WDT_INDEX_IO_PORT); /* Read Index 0x30 First */
- cr_data = inb(WDT_DATA_IO_PORT);
- cr_data |= 0x01; /* Set Bit0 to 1 */
- outb_p(0x30, WDT_INDEX_IO_PORT);
- outb_p(cr_data, WDT_DATA_IO_PORT); /* Index0x30_bit0P1 */
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "pc87413 - Enable SWC functions\n");
-#endif
-}
-
-/* Read SWC I/O base address */
-
-static inline unsigned int pc87413_get_swc_base(void)
-{
- unsigned int swc_base_addr = 0;
- unsigned char addr_l, addr_h = 0;
-
- /* Step 3: Read SWC I/O Base Address */
-
- outb_p(0x60, WDT_INDEX_IO_PORT); /* Read Index 0x60 */
- addr_h = inb(WDT_DATA_IO_PORT);
-
- outb_p(0x61, WDT_INDEX_IO_PORT); /* Read Index 0x61 */
-
- addr_l = inb(WDT_DATA_IO_PORT);
-
- swc_base_addr = (addr_h << 8) + addr_l;
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Read SWC I/O Base Address: low %d, high %d,"
- " res %d\n", addr_l, addr_h, swc_base_addr);
-#endif
-
- return swc_base_addr;
-}
-
-/* Select Bank 3 of SWC */
-
-static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
-{
- /* Step 4: Select Bank3 of SWC */
-
- outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Select Bank3 of SWC\n");
-#endif
-}
-
-/* Set watchdog timeout to x minutes */
-
-static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
- char pc87413_time)
-{
- /* Step 5: Programm WDTO, Twd. */
-
- outb_p(pc87413_time, swc_base_addr + WDTO);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Set WDTO to %d minutes\n", pc87413_time);
-#endif
-}
-
-/* Enable WDEN */
-
-static inline void pc87413_enable_wden(unsigned int swc_base_addr)
-{
- /* Step 6: Enable WDEN */
-
- outb_p(inb (swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Enable WDEN\n");
-#endif
-}
-
-/* Enable SW_WD_TREN */
-static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
-{
- /* Enable SW_WD_TREN */
-
- outb_p(inb (swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Enable SW_WD_TREN\n");
-#endif
-}
-
-/* Disable SW_WD_TREN */
-
-static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
-{
- /* Disable SW_WD_TREN */
-
- outb_p(inb (swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "pc87413 - Disable SW_WD_TREN\n");
-#endif
-}
-
-/* Enable SW_WD_TRG */
-
-static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
-{
- /* Enable SW_WD_TRG */
-
- outb_p(inb (swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "pc87413 - Enable SW_WD_TRG\n");
-#endif
-}
-
-/* Disable SW_WD_TRG */
-
-static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
-{
- /* Disable SW_WD_TRG */
-
- outb_p(inb (swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
-
-#ifdef DEBUG
- printk(KERN_INFO DPFX "Disable SW_WD_TRG\n");
-#endif
-}
-
-/* -- Higher level functions ------------------------------------*/
-
-/* Enable the watchdog */
-
-static void pc87413_enable(void)
-{
- unsigned int swc_base_addr;
-
- spin_lock(&io_lock);
-
- pc87413_select_wdt_out();
- pc87413_enable_swc();
- swc_base_addr = pc87413_get_swc_base();
- pc87413_swc_bank3(swc_base_addr);
- pc87413_programm_wdto(swc_base_addr, timeout);
- pc87413_enable_wden(swc_base_addr);
- pc87413_enable_sw_wd_tren(swc_base_addr);
- pc87413_enable_sw_wd_trg(swc_base_addr);
-
- spin_unlock(&io_lock);
-}
-
-/* Disable the watchdog */
-
-static void pc87413_disable(void)
-{
- unsigned int swc_base_addr;
-
- spin_lock(&io_lock);
-
- pc87413_select_wdt_out();
- pc87413_enable_swc();
- swc_base_addr = pc87413_get_swc_base();
- pc87413_swc_bank3(swc_base_addr);
- pc87413_disable_sw_wd_tren(swc_base_addr);
- pc87413_disable_sw_wd_trg(swc_base_addr);
- pc87413_programm_wdto(swc_base_addr, 0);
-
- spin_unlock(&io_lock);
-}
-
-/* Refresh the watchdog */
-
-static void pc87413_refresh(void)
-{
- unsigned int swc_base_addr;
-
- spin_lock(&io_lock);
-
- pc87413_select_wdt_out();
- pc87413_enable_swc();
- swc_base_addr = pc87413_get_swc_base();
- pc87413_swc_bank3(swc_base_addr);
- pc87413_disable_sw_wd_tren(swc_base_addr);
- pc87413_disable_sw_wd_trg(swc_base_addr);
- pc87413_programm_wdto(swc_base_addr, timeout);
- pc87413_enable_wden(swc_base_addr);
- pc87413_enable_sw_wd_tren(swc_base_addr);
- pc87413_enable_sw_wd_trg(swc_base_addr);
-
- spin_unlock(&io_lock);
-}
-
-/* -- File operations -------------------------------------------*/
-
-/**
- * pc87413_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- */
-
-static int pc87413_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
-
- if (test_and_set_bit(0, &timer_enabled))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Reload and activate timer */
- pc87413_refresh();
-
- printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to"
- " %d minute(s).\n", timeout);
-
- return nonseekable_open(inode, file);
-}
-
-/**
- * pc87413_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The watchdog has a configurable API. There is a religious dispute
- * between people who want their watchdog to be able to shut down and
- * those who want to be sure if the watchdog manager dies the machine
- * reboots. In the former case we disable the counters, in the latter
- * case you have to open it again very soon.
- */
-
-static int pc87413_release(struct inode *inode, struct file *file)
-{
- /* Shut off the timer. */
-
- if (expect_close == 42) {
- pc87413_disable();
- printk(KERN_INFO MODNAME "Watchdog disabled,"
- " sleeping again...\n");
- } else {
- printk(KERN_CRIT MODNAME "Unexpected close, not stopping"
- " watchdog!\n");
- pc87413_refresh();
- }
-
- clear_bit(0, &timer_enabled);
- expect_close = 0;
-
- return 0;
-}
-
-/**
- * pc87413_status:
- *
- * return, if the watchdog is enabled (timeout is set...)
- */
-
-
-static int pc87413_status(void)
-{
- return 0; /* currently not supported */
-}
-
-/**
- * pc87413_write:
- * @file: file handle to the watchdog
- * @data: data buffer to write
- * @len: length in bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t pc87413_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* reset expect flag */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- pc87413_refresh();
- }
- return len;
-}
-
-/**
- * pc87413_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features. We only actually usefully support
- * querying capabilities and current status.
- */
-
-static int pc87413_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_timeout;
-
- union {
- struct watchdog_info __user *ident;
- int __user *i;
- } uarg;
-
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "PC87413(HF/F) watchdog"
- };
-
- uarg.i = (int __user *)arg;
-
- switch(cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident,
- sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user(pc87413_status(), uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- pc87413_refresh();
-#ifdef DEBUG
- printk(KERN_INFO DPFX "keepalive\n");
-#endif
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- // the API states this is given in secs
- new_timeout /= 60;
-
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- pc87413_refresh();
-
- // fall through and return the new timeout...
-
- case WDIOC_GETTIMEOUT:
-
- new_timeout = timeout * 60;
-
- return put_user(new_timeout, uarg.i);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, uarg.i))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- pc87413_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- pc87413_enable();
- retval = 0;
- }
-
- return retval;
- }
- }
-}
-
-/* -- Notifier funtions -----------------------------------------*/
-
-/**
- * notify_sys:
- * @this: our notifier block
- * @code: the event being reported
- * @unused: unused
- *
- * Our notifier is called on system shutdowns. We want to turn the card
- * off at reboot otherwise the machine will reboot again during memory
- * test or worse yet during the following fsck. This would suck, in fact
- * trust me - if it happens it does suck.
- */
-
-static int pc87413_notify_sys(struct notifier_block *this,
- unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- {
- /* Turn the card off */
- pc87413_disable();
- }
- return NOTIFY_DONE;
-}
-
-/* -- Module's structures ---------------------------------------*/
-
-static const struct file_operations pc87413_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = pc87413_write,
- .ioctl = pc87413_ioctl,
- .open = pc87413_open,
- .release = pc87413_release,
-};
-
-static struct notifier_block pc87413_notifier =
-{
- .notifier_call = pc87413_notify_sys,
-};
-
-static struct miscdevice pc87413_miscdev=
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &pc87413_fops
-};
-
-/* -- Module init functions -------------------------------------*/
-
-/**
- * pc87413_init: module's "constructor"
- *
- * Set up the WDT watchdog board. All we have to do is grab the
- * resources we require and bitch if anyone beat us to them.
- * The open() function will actually kick the board off.
- */
-
-static int __init pc87413_init(void)
-{
- int ret;
-
- spin_lock_init(&io_lock);
-
- printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n", WDT_INDEX_IO_PORT);
-
- /* request_region(io, 2, "pc87413"); */
-
- ret = register_reboot_notifier(&pc87413_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- }
-
- ret = misc_register(&pc87413_miscdev);
-
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&pc87413_notifier);
- return ret;
- }
-
- printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
-
- pc87413_enable();
-
- return 0;
-}
-
-/**
- * pc87413_exit: module's "destructor"
- *
- * Unload the watchdog. You cannot do this with any file handles open.
- * If your watchdog is set to continue ticking on close and you unload
- * it, well it keeps ticking. We won't get the interrupt but the board
- * will not touch PC memory so all is fine. You just have to load a new
- * module in 60 seconds or reboot.
- */
-
-static void __exit pc87413_exit(void)
-{
- /* Stop the timer before we leave */
- if (!nowayout)
- {
- pc87413_disable();
- printk(KERN_INFO MODNAME "Watchdog disabled.\n");
- }
-
- misc_deregister(&pc87413_miscdev);
- unregister_reboot_notifier(&pc87413_notifier);
- /* release_region(io,2); */
-
- printk(MODNAME " watchdog component driver removed.\n");
-}
-
-module_init(pc87413_init);
-module_exit(pc87413_exit);
-
-MODULE_AUTHOR("Sven Anders <anders@anduras.de>, Marcus Junker <junker@anduras.de>,");
-MODULE_DESCRIPTION("PC87413 WDT driver");
-MODULE_LICENSE("GPL");
-
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(io, int, 0);
-MODULE_PARM_DESC(io, MODNAME " I/O port (default: " __MODULE_STRING(io) ").");
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes (default=" __MODULE_STRING(timeout) ").");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
+++ /dev/null
-/*
- * PC Watchdog Driver
- * by Ken Hollis (khollis@bitgate.com)
- *
- * Permission granted from Simon Machell (smachell@berkprod.com)
- * Written for the Linux Kernel, and GPLed by Ken Hollis
- *
- * 960107 Added request_region routines, modulized the whole thing.
- * 960108 Fixed end-of-file pointer (Thanks to Dan Hollis), added
- * WD_TIMEOUT define.
- * 960216 Added eof marker on the file, and changed verbose messages.
- * 960716 Made functional and cosmetic changes to the source for
- * inclusion in Linux 2.0.x kernels, thanks to Alan Cox.
- * 960717 Removed read/seek routines, replaced with ioctl. Also, added
- * check_region command due to Alan's suggestion.
- * 960821 Made changes to compile in newer 2.0.x kernels. Added
- * "cold reboot sense" entry.
- * 960825 Made a few changes to code, deleted some defines and made
- * typedefs to replace them. Made heartbeat reset only available
- * via ioctl, and removed the write routine.
- * 960828 Added new items for PC Watchdog Rev.C card.
- * 960829 Changed around all of the IOCTLs, added new features,
- * added watchdog disable/re-enable routines. Added firmware
- * version reporting. Added read routine for temperature.
- * Removed some extra defines, added an autodetect Revision
- * routine.
- * 961006 Revised some documentation, fixed some cosmetic bugs. Made
- * drivers to panic the system if it's overheating at bootup.
- * 961118 Changed some verbiage on some of the output, tidied up
- * code bits, and added compatibility to 2.1.x.
- * 970912 Enabled board on open and disable on close.
- * 971107 Took account of recent VFS changes (broke read).
- * 971210 Disable board on initialisation in case board already ticking.
- * 971222 Changed open/close for temperature handling
- * Michael Meskes <meskes@debian.org>.
- * 980112 Used minor numbers from include/linux/miscdevice.h
- * 990403 Clear reset status after reading control status register in
- * pcwd_showprevstate(). [Marc Boucher <marc@mbsi.ca>]
- * 990605 Made changes to code to support Firmware 1.22a, added
- * fairly useless proc entry.
- * 990610 removed said useless proc code for the merge <alan>
- * 000403 Removed last traces of proc code. <davej>
- * 011214 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com>
- * Added timeout module option to override default
- */
-
-/*
- * A bells and whistles driver is available from http://www.pcwd.de/
- * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
- */
-
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/delay.h> /* For mdelay function */
-#include <linux/timer.h> /* For timer related operations */
-#include <linux/jiffies.h> /* For jiffies stuff */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
-#include <linux/watchdog.h> /* For the watchdog specific items */
-#include <linux/reboot.h> /* For kernel_power_off() */
-#include <linux/init.h> /* For __init/__exit/... */
-#include <linux/fs.h> /* For file operations */
-#include <linux/isa.h> /* For isa devices */
-#include <linux/ioport.h> /* For io-port access */
-#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
-
-/* Module and version information */
-#define WATCHDOG_VERSION "1.20"
-#define WATCHDOG_DATE "18 Feb 2007"
-#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
-#define WATCHDOG_NAME "pcwd"
-#define PFX WATCHDOG_NAME ": "
-#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
-#define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")"
-
-/*
- * It should be noted that PCWD_REVISION_B was removed because A and B
- * are essentially the same types of card, with the exception that B
- * has temperature reporting. Since I didn't receive a Rev.B card,
- * the Rev.B card is not supported. (It's a good thing too, as they
- * are no longer in production.)
- */
-#define PCWD_REVISION_A 1
-#define PCWD_REVISION_C 2
-
-/*
- * These are the auto-probe addresses available.
- *
- * Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350.
- * Revision A has an address range of 2 addresses, while Revision C has 4.
- */
-#define PCWD_ISA_NR_CARDS 3
-static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
-
-/*
- * These are the defines that describe the control status bits for the
- * PCI-PC Watchdog card.
-*/
-/* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */
-#define WD_WDRST 0x01 /* Previously reset state */
-#define WD_T110 0x02 /* Temperature overheat sense */
-#define WD_HRTBT 0x04 /* Heartbeat sense */
-#define WD_RLY2 0x08 /* External relay triggered */
-#define WD_SRLY2 0x80 /* Software external relay triggered */
-/* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */
-#define WD_REVC_WTRP 0x01 /* Watchdog Trip status */
-#define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */
-#define WD_REVC_TTRP 0x04 /* Temperature Trip status */
-#define WD_REVC_RL2A 0x08 /* Relay 2 activated by on-board processor */
-#define WD_REVC_RL1A 0x10 /* Relay 1 active */
-#define WD_REVC_R2DS 0x40 /* Relay 2 disable */
-#define WD_REVC_RLY2 0x80 /* Relay 2 activated? */
-/* Port 2 : Control Status #2 */
-#define WD_WDIS 0x10 /* Watchdog Disabled */
-#define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */
-#define WD_SSEL 0x40 /* Watchdog Switch Select (1:SW1 <-> 0:SW2) */
-#define WD_WCMD 0x80 /* Watchdog Command Mode */
-
-/* max. time we give an ISA watchdog card to process a command */
-/* 500ms for each 4 bit response (according to spec.) */
-#define ISA_COMMAND_TIMEOUT 1000
-
-/* Watchdog's internal commands */
-#define CMD_ISA_IDLE 0x00
-#define CMD_ISA_VERSION_INTEGER 0x01
-#define CMD_ISA_VERSION_TENTH 0x02
-#define CMD_ISA_VERSION_HUNDRETH 0x03
-#define CMD_ISA_VERSION_MINOR 0x04
-#define CMD_ISA_SWITCH_SETTINGS 0x05
-#define CMD_ISA_RESET_PC 0x06
-#define CMD_ISA_ARM_0 0x07
-#define CMD_ISA_ARM_30 0x08
-#define CMD_ISA_ARM_60 0x09
-#define CMD_ISA_DELAY_TIME_2SECS 0x0A
-#define CMD_ISA_DELAY_TIME_4SECS 0x0B
-#define CMD_ISA_DELAY_TIME_8SECS 0x0C
-#define CMD_ISA_RESET_RELAYS 0x0D
-
-/* Watchdog's Dip Switch heartbeat values */
-static const int heartbeat_tbl [] = {
- 20, /* OFF-OFF-OFF = 20 Sec */
- 40, /* OFF-OFF-ON = 40 Sec */
- 60, /* OFF-ON-OFF = 1 Min */
- 300, /* OFF-ON-ON = 5 Min */
- 600, /* ON-OFF-OFF = 10 Min */
- 1800, /* ON-OFF-ON = 30 Min */
- 3600, /* ON-ON-OFF = 1 Hour */
- 7200, /* ON-ON-ON = 2 hour */
-};
-
-/*
- * We are using an kernel timer to do the pinging of the watchdog
- * every ~500ms. We try to set the internal heartbeat of the
- * watchdog to 2 ms.
- */
-
-#define WDT_INTERVAL (HZ/2+1)
-
-/* We can only use 1 card due to the /dev/watchdog restriction */
-static int cards_found;
-
-/* internal variables */
-static atomic_t open_allowed = ATOMIC_INIT(1);
-static char expect_close;
-static int temp_panic;
-static struct { /* this is private data for each ISA-PC watchdog card */
- char fw_ver_str[6]; /* The cards firmware version */
- int revision; /* The card's revision */
- int supports_temp; /* Wether or not the card has a temperature device */
- int command_mode; /* Wether or not the card is in command mode */
- int boot_status; /* The card's boot status */
- int io_addr; /* The cards I/O address */
- spinlock_t io_lock; /* the lock for io operations */
- struct timer_list timer; /* The timer that pings the watchdog */
- unsigned long next_heartbeat; /* the next_heartbeat for the timer */
-} pcwd_private;
-
-/* module parameters */
-#define QUIET 0 /* Default */
-#define VERBOSE 1 /* Verbose */
-#define DEBUG 2 /* print fancy stuff too */
-static int debug = QUIET;
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
-
-#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
-static int heartbeat = WATCHDOG_HEARTBEAT;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Internal functions
- */
-
-static int send_isa_command(int cmd)
-{
- int i;
- int control_status;
- int port0, last_port0; /* Double read for stabilising */
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n",
- cmd);
-
- /* The WCMD bit must be 1 and the command is only 4 bits in size */
- control_status = (cmd & 0x0F) | WD_WCMD;
- outb_p(control_status, pcwd_private.io_addr + 2);
- udelay(ISA_COMMAND_TIMEOUT);
-
- port0 = inb_p(pcwd_private.io_addr);
- for (i = 0; i < 25; ++i) {
- last_port0 = port0;
- port0 = inb_p(pcwd_private.io_addr);
-
- if (port0 == last_port0)
- break; /* Data is stable */
-
- udelay (250);
- }
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n",
- cmd, port0, last_port0);
-
- return port0;
-}
-
-static int set_command_mode(void)
-{
- int i, found=0, count=0;
-
- /* Set the card into command mode */
- spin_lock(&pcwd_private.io_lock);
- while ((!found) && (count < 3)) {
- i = send_isa_command(CMD_ISA_IDLE);
-
- if (i == 0x00)
- found = 1;
- else if (i == 0xF3) {
- /* Card does not like what we've done to it */
- outb_p(0x00, pcwd_private.io_addr + 2);
- udelay(1200); /* Spec says wait 1ms */
- outb_p(0x00, pcwd_private.io_addr + 2);
- udelay(ISA_COMMAND_TIMEOUT);
- }
- count++;
- }
- spin_unlock(&pcwd_private.io_lock);
- pcwd_private.command_mode = found;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "command_mode=%d\n",
- pcwd_private.command_mode);
-
- return(found);
-}
-
-static void unset_command_mode(void)
-{
- /* Set the card into normal mode */
- spin_lock(&pcwd_private.io_lock);
- outb_p(0x00, pcwd_private.io_addr + 2);
- udelay(ISA_COMMAND_TIMEOUT);
- spin_unlock(&pcwd_private.io_lock);
-
- pcwd_private.command_mode = 0;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "command_mode=%d\n",
- pcwd_private.command_mode);
-}
-
-static inline void pcwd_check_temperature_support(void)
-{
- if (inb(pcwd_private.io_addr) != 0xF0)
- pcwd_private.supports_temp = 1;
-}
-
-static inline void pcwd_get_firmware(void)
-{
- int one, ten, hund, minor;
-
- strcpy(pcwd_private.fw_ver_str, "ERROR");
-
- if (set_command_mode()) {
- one = send_isa_command(CMD_ISA_VERSION_INTEGER);
- ten = send_isa_command(CMD_ISA_VERSION_TENTH);
- hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH);
- minor = send_isa_command(CMD_ISA_VERSION_MINOR);
- sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", one, ten, hund, minor);
- }
- unset_command_mode();
-
- return;
-}
-
-static inline int pcwd_get_option_switches(void)
-{
- int option_switches=0;
-
- if (set_command_mode()) {
- /* Get switch settings */
- option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS);
- }
-
- unset_command_mode();
- return(option_switches);
-}
-
-static void pcwd_show_card_info(void)
-{
- int option_switches;
-
- /* Get some extra info from the hardware (in command/debug/diag mode) */
- if (pcwd_private.revision == PCWD_REVISION_A)
- printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", pcwd_private.io_addr);
- else if (pcwd_private.revision == PCWD_REVISION_C) {
- pcwd_get_firmware();
- printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",
- pcwd_private.io_addr, pcwd_private.fw_ver_str);
- option_switches = pcwd_get_option_switches();
- printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
- option_switches,
- ((option_switches & 0x10) ? "ON" : "OFF"),
- ((option_switches & 0x08) ? "ON" : "OFF"));
-
- /* Reprogram internal heartbeat to 2 seconds */
- if (set_command_mode()) {
- send_isa_command(CMD_ISA_DELAY_TIME_2SECS);
- unset_command_mode();
- }
- }
-
- if (pcwd_private.supports_temp)
- printk(KERN_INFO PFX "Temperature Option Detected\n");
-
- if (pcwd_private.boot_status & WDIOF_CARDRESET)
- printk(KERN_INFO PFX "Previous reboot was caused by the card\n");
-
- if (pcwd_private.boot_status & WDIOF_OVERHEAT) {
- printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n");
- printk(KERN_EMERG PFX "CPU Overheat\n");
- }
-
- if (pcwd_private.boot_status == 0)
- printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
-}
-
-static void pcwd_timer_ping(unsigned long data)
-{
- int wdrst_stat;
-
- /* If we got a heartbeat pulse within the WDT_INTERVAL
- * we agree to ping the WDT */
- if(time_before(jiffies, pcwd_private.next_heartbeat)) {
- /* Ping the watchdog */
- spin_lock(&pcwd_private.io_lock);
- if (pcwd_private.revision == PCWD_REVISION_A) {
- /* Rev A cards are reset by setting the WD_WDRST bit in register 1 */
- wdrst_stat = inb_p(pcwd_private.io_addr);
- wdrst_stat &= 0x0F;
- wdrst_stat |= WD_WDRST;
-
- outb_p(wdrst_stat, pcwd_private.io_addr + 1);
- } else {
- /* Re-trigger watchdog by writing to port 0 */
- outb_p(0x00, pcwd_private.io_addr);
- }
-
- /* Re-set the timer interval */
- mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL);
-
- spin_unlock(&pcwd_private.io_lock);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
-}
-
-static int pcwd_start(void)
-{
- int stat_reg;
-
- pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
-
- /* Start the timer */
- mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL);
-
- /* Enable the port */
- if (pcwd_private.revision == PCWD_REVISION_C) {
- spin_lock(&pcwd_private.io_lock);
- outb_p(0x00, pcwd_private.io_addr + 3);
- udelay(ISA_COMMAND_TIMEOUT);
- stat_reg = inb_p(pcwd_private.io_addr + 2);
- spin_unlock(&pcwd_private.io_lock);
- if (stat_reg & WD_WDIS) {
- printk(KERN_INFO PFX "Could not start watchdog\n");
- return -EIO;
- }
- }
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog started\n");
-
- return 0;
-}
-
-static int pcwd_stop(void)
-{
- int stat_reg;
-
- /* Stop the timer */
- del_timer(&pcwd_private.timer);
-
- /* Disable the board */
- if (pcwd_private.revision == PCWD_REVISION_C) {
- spin_lock(&pcwd_private.io_lock);
- outb_p(0xA5, pcwd_private.io_addr + 3);
- udelay(ISA_COMMAND_TIMEOUT);
- outb_p(0xA5, pcwd_private.io_addr + 3);
- udelay(ISA_COMMAND_TIMEOUT);
- stat_reg = inb_p(pcwd_private.io_addr + 2);
- spin_unlock(&pcwd_private.io_lock);
- if ((stat_reg & WD_WDIS) == 0) {
- printk(KERN_INFO PFX "Could not stop watchdog\n");
- return -EIO;
- }
- }
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog stopped\n");
-
- return 0;
-}
-
-static int pcwd_keepalive(void)
-{
- /* user land ping */
- pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
-
- return 0;
-}
-
-static int pcwd_set_heartbeat(int t)
-{
- if ((t < 2) || (t > 7200)) /* arbitrary upper limit */
- return -EINVAL;
-
- heartbeat = t;
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "New heartbeat: %d\n",
- heartbeat);
-
- return 0;
-}
-
-static int pcwd_get_status(int *status)
-{
- int control_status;
-
- *status=0;
- spin_lock(&pcwd_private.io_lock);
- if (pcwd_private.revision == PCWD_REVISION_A)
- /* Rev A cards return status information from
- * the base register, which is used for the
- * temperature in other cards. */
- control_status = inb(pcwd_private.io_addr);
- else {
- /* Rev C cards return card status in the base
- * address + 1 register. And use different bits
- * to indicate a card initiated reset, and an
- * over-temperature condition. And the reboot
- * status can be reset. */
- control_status = inb(pcwd_private.io_addr + 1);
- }
- spin_unlock(&pcwd_private.io_lock);
-
- if (pcwd_private.revision == PCWD_REVISION_A) {
- if (control_status & WD_WDRST)
- *status |= WDIOF_CARDRESET;
-
- if (control_status & WD_T110) {
- *status |= WDIOF_OVERHEAT;
- if (temp_panic) {
- printk(KERN_INFO PFX "Temperature overheat trip!\n");
- kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
- }
- }
- } else {
- if (control_status & WD_REVC_WTRP)
- *status |= WDIOF_CARDRESET;
-
- if (control_status & WD_REVC_TTRP) {
- *status |= WDIOF_OVERHEAT;
- if (temp_panic) {
- printk(KERN_INFO PFX "Temperature overheat trip!\n");
- kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
- }
- }
- }
-
- return 0;
-}
-
-static int pcwd_clear_status(void)
-{
- int control_status;
-
- if (pcwd_private.revision == PCWD_REVISION_C) {
- spin_lock(&pcwd_private.io_lock);
-
- if (debug >= VERBOSE)
- printk(KERN_INFO PFX "clearing watchdog trip status\n");
-
- control_status = inb_p(pcwd_private.io_addr + 1);
-
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
- printk(KERN_DEBUG PFX "sending: 0x%02x\n",
- (control_status & WD_REVC_R2DS));
- }
-
- /* clear reset status & Keep Relay 2 disable state as it is */
- outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1);
-
- spin_unlock(&pcwd_private.io_lock);
- }
- return 0;
-}
-
-static int pcwd_get_temperature(int *temperature)
-{
- /* check that port 0 gives temperature info and no command results */
- if (pcwd_private.command_mode)
- return -1;
-
- *temperature = 0;
- if (!pcwd_private.supports_temp)
- return -ENODEV;
-
- /*
- * Convert celsius to fahrenheit, since this was
- * the decided 'standard' for this return value.
- */
- spin_lock(&pcwd_private.io_lock);
- *temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32;
- spin_unlock(&pcwd_private.io_lock);
-
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "temperature is: %d F\n",
- *temperature);
- }
-
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int pcwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int rv;
- int status;
- int temperature;
- int new_heartbeat;
- int __user *argp = (int __user *)arg;
- static struct watchdog_info ident = {
- .options = WDIOF_OVERHEAT |
- WDIOF_CARDRESET |
- WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "PCWD",
- };
-
- switch(cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- if(copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- return 0;
-
- case WDIOC_GETSTATUS:
- pcwd_get_status(&status);
- return put_user(status, argp);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(pcwd_private.boot_status, argp);
-
- case WDIOC_GETTEMP:
- if (pcwd_get_temperature(&temperature))
- return -EFAULT;
-
- return put_user(temperature, argp);
-
- case WDIOC_SETOPTIONS:
- if (pcwd_private.revision == PCWD_REVISION_C)
- {
- if(copy_from_user(&rv, argp, sizeof(int)))
- return -EFAULT;
-
- if (rv & WDIOS_DISABLECARD)
- {
- return pcwd_stop();
- }
-
- if (rv & WDIOS_ENABLECARD)
- {
- return pcwd_start();
- }
-
- if (rv & WDIOS_TEMPPANIC)
- {
- temp_panic = 1;
- }
- }
- return -EINVAL;
-
- case WDIOC_KEEPALIVE:
- pcwd_keepalive();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, argp))
- return -EFAULT;
-
- if (pcwd_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- pcwd_keepalive();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, argp);
- }
-
- return 0;
-}
-
-static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len,
- loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- pcwd_keepalive();
- }
- return len;
-}
-
-static int pcwd_open(struct inode *inode, struct file *file)
-{
- if (!atomic_dec_and_test(&open_allowed) ) {
- if (debug >= VERBOSE)
- printk(KERN_ERR PFX "Attempt to open already opened device.\n");
- atomic_inc( &open_allowed );
- return -EBUSY;
- }
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate */
- pcwd_start();
- pcwd_keepalive();
- return nonseekable_open(inode, file);
-}
-
-static int pcwd_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- pcwd_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- pcwd_keepalive();
- }
- expect_close = 0;
- atomic_inc( &open_allowed );
- return 0;
-}
-
-/*
- * /dev/temperature handling
- */
-
-static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count,
- loff_t *ppos)
-{
- int temperature;
-
- if (pcwd_get_temperature(&temperature))
- return -EFAULT;
-
- if (copy_to_user(buf, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-static int pcwd_temp_open(struct inode *inode, struct file *file)
-{
- if (!pcwd_private.supports_temp)
- return -ENODEV;
-
- return nonseekable_open(inode, file);
-}
-
-static int pcwd_temp_close(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations pcwd_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = pcwd_write,
- .ioctl = pcwd_ioctl,
- .open = pcwd_open,
- .release = pcwd_close,
-};
-
-static struct miscdevice pcwd_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &pcwd_fops,
-};
-
-static const struct file_operations pcwd_temp_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = pcwd_temp_read,
- .open = pcwd_temp_open,
- .release = pcwd_temp_close,
-};
-
-static struct miscdevice temp_miscdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &pcwd_temp_fops,
-};
-
-/*
- * Init & exit routines
- */
-
-static inline int get_revision(void)
-{
- int r = PCWD_REVISION_C;
-
- spin_lock(&pcwd_private.io_lock);
- /* REV A cards use only 2 io ports; test
- * presumes a floating bus reads as 0xff. */
- if ((inb(pcwd_private.io_addr + 2) == 0xFF) ||
- (inb(pcwd_private.io_addr + 3) == 0xFF))
- r=PCWD_REVISION_A;
- spin_unlock(&pcwd_private.io_lock);
-
- return r;
-}
-
-/*
- * The ISA cards have a heartbeat bit in one of the registers, which
- * register is card dependent. The heartbeat bit is monitored, and if
- * found, is considered proof that a Berkshire card has been found.
- * The initial rate is once per second at board start up, then twice
- * per second for normal operation.
- */
-static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
-{
- int base_addr=pcwd_ioports[id];
- int port0, last_port0; /* Reg 0, in case it's REV A */
- int port1, last_port1; /* Register 1 for REV C cards */
- int i;
- int retval;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n",
- id);
-
- if (!request_region (base_addr, 4, "PCWD")) {
- printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr);
- return 0;
- }
-
- retval = 0;
-
- port0 = inb_p(base_addr); /* For REV A boards */
- port1 = inb_p(base_addr + 1); /* For REV C boards */
- if (port0 != 0xff || port1 != 0xff) {
- /* Not an 'ff' from a floating bus, so must be a card! */
- for (i = 0; i < 4; ++i) {
-
- msleep(500);
-
- last_port0 = port0;
- last_port1 = port1;
-
- port0 = inb_p(base_addr);
- port1 = inb_p(base_addr + 1);
-
- /* Has either hearbeat bit changed? */
- if ((port0 ^ last_port0) & WD_HRTBT ||
- (port1 ^ last_port1) & WD_REVC_HRBT) {
- retval = 1;
- break;
- }
- }
- }
- release_region (base_addr, 4);
-
- return retval;
-}
-
-static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
-{
- int ret;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n",
- id);
-
- cards_found++;
- if (cards_found == 1)
- printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", WD_VER);
-
- if (cards_found > 1) {
- printk(KERN_ERR PFX "This driver only supports 1 device\n");
- return -ENODEV;
- }
-
- if (pcwd_ioports[id] == 0x0000) {
- printk(KERN_ERR PFX "No I/O-Address for card detected\n");
- return -ENODEV;
- }
- pcwd_private.io_addr = pcwd_ioports[id];
-
- spin_lock_init(&pcwd_private.io_lock);
-
- /* Check card's revision */
- pcwd_private.revision = get_revision();
-
- if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- pcwd_private.io_addr);
- ret=-EIO;
- goto error_request_region;
- }
-
- /* Initial variables */
- pcwd_private.supports_temp = 0;
- temp_panic = 0;
- pcwd_private.boot_status = 0x0000;
-
- /* get the boot_status */
- pcwd_get_status(&pcwd_private.boot_status);
-
- /* clear the "card caused reboot" flag */
- pcwd_clear_status();
-
- setup_timer(&pcwd_private.timer, pcwd_timer_ping, 0);
-
- /* Disable the board */
- pcwd_stop();
-
- /* Check whether or not the card supports the temperature device */
- pcwd_check_temperature_support();
-
- /* Show info about the card itself */
- pcwd_show_card_info();
-
- /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
- if (heartbeat == 0)
- heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)];
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (pcwd_set_heartbeat(heartbeat)) {
- pcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n",
- WATCHDOG_HEARTBEAT);
- }
-
- if (pcwd_private.supports_temp) {
- ret = misc_register(&temp_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
- goto error_misc_register_temp;
- }
- }
-
- ret = misc_register(&pcwd_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto error_misc_register_watchdog;
- }
-
- printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
- return 0;
-
-error_misc_register_watchdog:
- if (pcwd_private.supports_temp)
- misc_deregister(&temp_miscdev);
-error_misc_register_temp:
- release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
-error_request_region:
- pcwd_private.io_addr = 0x0000;
- cards_found--;
- return ret;
-}
-
-static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id)
-{
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n",
- id);
-
- if (!pcwd_private.io_addr)
- return 1;
-
- /* Disable the board */
- if (!nowayout)
- pcwd_stop();
-
- /* Deregister */
- misc_deregister(&pcwd_miscdev);
- if (pcwd_private.supports_temp)
- misc_deregister(&temp_miscdev);
- release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
- pcwd_private.io_addr = 0x0000;
- cards_found--;
-
- return 0;
-}
-
-static void pcwd_isa_shutdown(struct device *dev, unsigned int id)
-{
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n",
- id);
-
- pcwd_stop();
-}
-
-static struct isa_driver pcwd_isa_driver = {
- .match = pcwd_isa_match,
- .probe = pcwd_isa_probe,
- .remove = __devexit_p(pcwd_isa_remove),
- .shutdown = pcwd_isa_shutdown,
- .driver = {
- .owner = THIS_MODULE,
- .name = WATCHDOG_NAME,
- },
-};
-
-static int __init pcwd_init_module(void)
-{
- return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS);
-}
-
-static void __exit pcwd_cleanup_module(void)
-{
- isa_unregister_driver(&pcwd_isa_driver);
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(pcwd_init_module);
-module_exit(pcwd_cleanup_module);
-
-MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, Wim Van Sebroeck <wim@iguana.be>");
-MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver");
-MODULE_VERSION(WATCHDOG_VERSION);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
+++ /dev/null
-/*
- * Berkshire PCI-PC Watchdog Card Driver
- *
- * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
- *
- * Based on source code of the following authors:
- * Ken Hollis <kenji@bitgate.com>,
- * Lindsay Harris <lindsay@bluegum.com>,
- * Alan Cox <alan@redhat.com>,
- * Matt Domsch <Matt_Domsch@dell.com>,
- * Rob Radez <rob@osinvestor.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
- * provide warranty for any of this software. This material is
- * provided "AS-IS" and at no charge.
- */
-
-/*
- * A bells and whistles driver is available from:
- * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
- *
- * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
- */
-
-/*
- * Includes, defines, variables, module parameters, ...
- */
-
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/delay.h> /* For mdelay function */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
-#include <linux/watchdog.h> /* For the watchdog specific items */
-#include <linux/notifier.h> /* For notifier support */
-#include <linux/reboot.h> /* For reboot_notifier stuff */
-#include <linux/init.h> /* For __init/__exit/... */
-#include <linux/fs.h> /* For file operations */
-#include <linux/pci.h> /* For pci functions */
-#include <linux/ioport.h> /* For io-port access */
-#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
-
-/* Module and version information */
-#define WATCHDOG_VERSION "1.03"
-#define WATCHDOG_DATE "21 Jan 2007"
-#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
-#define WATCHDOG_NAME "pcwd_pci"
-#define PFX WATCHDOG_NAME ": "
-#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
-
-/* Stuff for the PCI ID's */
-#ifndef PCI_VENDOR_ID_QUICKLOGIC
-#define PCI_VENDOR_ID_QUICKLOGIC 0x11e3
-#endif
-
-#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD
-#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030
-#endif
-
-/*
- * These are the defines that describe the control status bits for the
- * PCI-PC Watchdog card.
- */
-/* Port 1 : Control Status #1 */
-#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */
-#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */
-#define WD_PCI_TTRP 0x04 /* Temperature Trip status */
-#define WD_PCI_RL2A 0x08 /* Relay 2 Active */
-#define WD_PCI_RL1A 0x10 /* Relay 1 Active */
-#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */
-#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */
-/* Port 2 : Control Status #2 */
-#define WD_PCI_WDIS 0x10 /* Watchdog Disable */
-#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */
-#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */
-#define WD_PCI_PCMD 0x80 /* PC has sent command */
-
-/* according to documentation max. time to process a command for the pci
- * watchdog card is 100 ms, so we give it 150 ms to do it's job */
-#define PCI_COMMAND_TIMEOUT 150
-
-/* Watchdog's internal commands */
-#define CMD_GET_STATUS 0x04
-#define CMD_GET_FIRMWARE_VERSION 0x08
-#define CMD_READ_WATCHDOG_TIMEOUT 0x18
-#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19
-#define CMD_GET_CLEAR_RESET_COUNT 0x84
-
-/* Watchdog's Dip Switch heartbeat values */
-static const int heartbeat_tbl [] = {
- 5, /* OFF-OFF-OFF = 5 Sec */
- 10, /* OFF-OFF-ON = 10 Sec */
- 30, /* OFF-ON-OFF = 30 Sec */
- 60, /* OFF-ON-ON = 1 Min */
- 300, /* ON-OFF-OFF = 5 Min */
- 600, /* ON-OFF-ON = 10 Min */
- 1800, /* ON-ON-OFF = 30 Min */
- 3600, /* ON-ON-ON = 1 hour */
-};
-
-/* We can only use 1 card due to the /dev/watchdog restriction */
-static int cards_found;
-
-/* internal variables */
-static int temp_panic;
-static unsigned long is_active;
-static char expect_release;
-static struct { /* this is private data for each PCI-PC watchdog card */
- int supports_temp; /* Wether or not the card has a temperature device */
- int boot_status; /* The card's boot status */
- unsigned long io_addr; /* The cards I/O address */
- spinlock_t io_lock; /* the lock for io operations */
- struct pci_dev *pdev; /* the PCI-device */
-} pcipcwd_private;
-
-/* module parameters */
-#define QUIET 0 /* Default */
-#define VERBOSE 1 /* Verbose */
-#define DEBUG 2 /* print fancy stuff too */
-static int debug = QUIET;
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
-
-#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
-static int heartbeat = WATCHDOG_HEARTBEAT;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Internal functions
- */
-
-static int send_command(int cmd, int *msb, int *lsb)
-{
- int got_response, count;
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
- cmd, *msb, *lsb);
-
- spin_lock(&pcipcwd_private.io_lock);
- /* If a command requires data it should be written first.
- * Data for commands with 8 bits of data should be written to port 4.
- * Commands with 16 bits of data, should be written as LSB to port 4
- * and MSB to port 5.
- * After the required data has been written then write the command to
- * port 6. */
- outb_p(*lsb, pcipcwd_private.io_addr + 4);
- outb_p(*msb, pcipcwd_private.io_addr + 5);
- outb_p(cmd, pcipcwd_private.io_addr + 6);
-
- /* wait till the pci card processed the command, signaled by
- * the WRSP bit in port 2 and give it a max. timeout of
- * PCI_COMMAND_TIMEOUT to process */
- got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
- for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
- mdelay(1);
- got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
- }
-
- if (debug >= DEBUG) {
- if (got_response) {
- printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
- count);
- } else {
- printk(KERN_DEBUG PFX "card did not respond on command!\n");
- }
- }
-
- if (got_response) {
- /* read back response */
- *lsb = inb_p(pcipcwd_private.io_addr + 4);
- *msb = inb_p(pcipcwd_private.io_addr + 5);
-
- /* clear WRSP bit */
- inb_p(pcipcwd_private.io_addr + 6);
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
- cmd, *msb, *lsb);
- }
-
- spin_unlock(&pcipcwd_private.io_lock);
-
- return got_response;
-}
-
-static inline void pcipcwd_check_temperature_support(void)
-{
- if (inb_p(pcipcwd_private.io_addr) != 0xF0)
- pcipcwd_private.supports_temp = 1;
-}
-
-static int pcipcwd_get_option_switches(void)
-{
- int option_switches;
-
- option_switches = inb_p(pcipcwd_private.io_addr + 3);
- return option_switches;
-}
-
-static void pcipcwd_show_card_info(void)
-{
- int got_fw_rev, fw_rev_major, fw_rev_minor;
- char fw_ver_str[20]; /* The cards firmware version */
- int option_switches;
-
- got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
- if (got_fw_rev) {
- sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
- } else {
- sprintf(fw_ver_str, "<card no answer>");
- }
-
- /* Get switch settings */
- option_switches = pcipcwd_get_option_switches();
-
- printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
- (int) pcipcwd_private.io_addr, fw_ver_str,
- (pcipcwd_private.supports_temp ? "with" : "without"));
-
- printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
- option_switches,
- ((option_switches & 0x10) ? "ON" : "OFF"),
- ((option_switches & 0x08) ? "ON" : "OFF"));
-
- if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
- printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
-
- if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
- printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
-
- if (pcipcwd_private.boot_status == 0)
- printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
-}
-
-static int pcipcwd_start(void)
-{
- int stat_reg;
-
- spin_lock(&pcipcwd_private.io_lock);
- outb_p(0x00, pcipcwd_private.io_addr + 3);
- udelay(1000);
-
- stat_reg = inb_p(pcipcwd_private.io_addr + 2);
- spin_unlock(&pcipcwd_private.io_lock);
-
- if (stat_reg & WD_PCI_WDIS) {
- printk(KERN_ERR PFX "Card timer not enabled\n");
- return -1;
- }
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog started\n");
-
- return 0;
-}
-
-static int pcipcwd_stop(void)
-{
- int stat_reg;
-
- spin_lock(&pcipcwd_private.io_lock);
- outb_p(0xA5, pcipcwd_private.io_addr + 3);
- udelay(1000);
-
- outb_p(0xA5, pcipcwd_private.io_addr + 3);
- udelay(1000);
-
- stat_reg = inb_p(pcipcwd_private.io_addr + 2);
- spin_unlock(&pcipcwd_private.io_lock);
-
- if (!(stat_reg & WD_PCI_WDIS)) {
- printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
- return -1;
- }
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Watchdog stopped\n");
-
- return 0;
-}
-
-static int pcipcwd_keepalive(void)
-{
- /* Re-trigger watchdog by writing to port 0 */
- spin_lock(&pcipcwd_private.io_lock);
- outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */
- spin_unlock(&pcipcwd_private.io_lock);
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
-
- return 0;
-}
-
-static int pcipcwd_set_heartbeat(int t)
-{
- int t_msb = t / 256;
- int t_lsb = t % 256;
-
- if ((t < 0x0001) || (t > 0xFFFF))
- return -EINVAL;
-
- /* Write new heartbeat to watchdog */
- send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
-
- heartbeat = t;
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "New heartbeat: %d\n",
- heartbeat);
-
- return 0;
-}
-
-static int pcipcwd_get_status(int *status)
-{
- int control_status;
-
- *status=0;
- control_status = inb_p(pcipcwd_private.io_addr + 1);
- if (control_status & WD_PCI_WTRP)
- *status |= WDIOF_CARDRESET;
- if (control_status & WD_PCI_TTRP) {
- *status |= WDIOF_OVERHEAT;
- if (temp_panic)
- panic(PFX "Temperature overheat trip!\n");
- }
-
- if (debug >= DEBUG)
- printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
- control_status);
-
- return 0;
-}
-
-static int pcipcwd_clear_status(void)
-{
- int control_status;
- int msb;
- int reset_counter;
-
- if (debug >= VERBOSE)
- printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
-
- control_status = inb_p(pcipcwd_private.io_addr + 1);
-
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
- printk(KERN_DEBUG PFX "sending: 0x%02x\n",
- (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
- }
-
- /* clear trip status & LED and keep mode of relay 2 */
- outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
-
- /* clear reset counter */
- msb=0;
- reset_counter=0xff;
- send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
-
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
- reset_counter);
- }
-
- return 0;
-}
-
-static int pcipcwd_get_temperature(int *temperature)
-{
- *temperature = 0;
- if (!pcipcwd_private.supports_temp)
- return -ENODEV;
-
- spin_lock(&pcipcwd_private.io_lock);
- *temperature = inb_p(pcipcwd_private.io_addr);
- spin_unlock(&pcipcwd_private.io_lock);
-
- /*
- * Convert celsius to fahrenheit, since this was
- * the decided 'standard' for this return value.
- */
- *temperature = (*temperature * 9 / 5) + 32;
-
- if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "temperature is: %d F\n",
- *temperature);
- }
-
- return 0;
-}
-
-static int pcipcwd_get_timeleft(int *time_left)
-{
- int msb;
- int lsb;
-
- /* Read the time that's left before rebooting */
- /* Note: if the board is not yet armed then we will read 0xFFFF */
- send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
-
- *time_left = (msb << 8) + lsb;
-
- if (debug >= VERBOSE)
- printk(KERN_DEBUG PFX "Time left before next reboot: %d\n",
- *time_left);
-
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t pcipcwd_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- expect_release = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if(get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_release = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- pcipcwd_keepalive();
- }
- return len;
-}
-
-static int pcipcwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_OVERHEAT |
- WDIOF_CARDRESET |
- WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = WATCHDOG_DRIVER_NAME,
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- {
- int status;
-
- pcipcwd_get_status(&status);
-
- return put_user(status, p);
- }
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(pcipcwd_private.boot_status, p);
-
- case WDIOC_GETTEMP:
- {
- int temperature;
-
- if (pcipcwd_get_temperature(&temperature))
- return -EFAULT;
-
- return put_user(temperature, p);
- }
-
- case WDIOC_KEEPALIVE:
- pcipcwd_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if (get_user (new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- if (pcipcwd_stop())
- return -EIO;
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- if (pcipcwd_start())
- return -EIO;
- retval = 0;
- }
-
- if (new_options & WDIOS_TEMPPANIC) {
- temp_panic = 1;
- retval = 0;
- }
-
- return retval;
- }
-
- case WDIOC_SETTIMEOUT:
- {
- int new_heartbeat;
-
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (pcipcwd_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- pcipcwd_keepalive();
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
-
- case WDIOC_GETTIMELEFT:
- {
- int time_left;
-
- if (pcipcwd_get_timeleft(&time_left))
- return -EFAULT;
-
- return put_user(time_left, p);
- }
-
- default:
- return -ENOTTY;
- }
-}
-
-static int pcipcwd_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &is_active)) {
- if (debug >= VERBOSE)
- printk(KERN_ERR PFX "Attempt to open already opened device.\n");
- return -EBUSY;
- }
-
- /* Activate */
- pcipcwd_start();
- pcipcwd_keepalive();
- return nonseekable_open(inode, file);
-}
-
-static int pcipcwd_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- */
- if (expect_release == 42) {
- pcipcwd_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- pcipcwd_keepalive();
- }
- expect_release = 0;
- clear_bit(0, &is_active);
- return 0;
-}
-
-/*
- * /dev/temperature handling
- */
-
-static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
- size_t len, loff_t *ppos)
-{
- int temperature;
-
- if (pcipcwd_get_temperature(&temperature))
- return -EFAULT;
-
- if (copy_to_user (data, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-static int pcipcwd_temp_open(struct inode *inode, struct file *file)
-{
- if (!pcipcwd_private.supports_temp)
- return -ENODEV;
-
- return nonseekable_open(inode, file);
-}
-
-static int pcipcwd_temp_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-/*
- * Notify system
- */
-
-static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- pcipcwd_stop();
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations pcipcwd_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = pcipcwd_write,
- .ioctl = pcipcwd_ioctl,
- .open = pcipcwd_open,
- .release = pcipcwd_release,
-};
-
-static struct miscdevice pcipcwd_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &pcipcwd_fops,
-};
-
-static const struct file_operations pcipcwd_temp_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = pcipcwd_temp_read,
- .open = pcipcwd_temp_open,
- .release = pcipcwd_temp_release,
-};
-
-static struct miscdevice pcipcwd_temp_miscdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &pcipcwd_temp_fops,
-};
-
-static struct notifier_block pcipcwd_notifier = {
- .notifier_call = pcipcwd_notify_sys,
-};
-
-/*
- * Init & exit routines
- */
-
-static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- int ret = -EIO;
-
- cards_found++;
- if (cards_found == 1)
- printk(KERN_INFO PFX DRIVER_VERSION);
-
- if (cards_found > 1) {
- printk(KERN_ERR PFX "This driver only supports 1 device\n");
- return -ENODEV;
- }
-
- if (pci_enable_device(pdev)) {
- printk(KERN_ERR PFX "Not possible to enable PCI Device\n");
- return -ENODEV;
- }
-
- if (pci_resource_start(pdev, 0) == 0x0000) {
- printk(KERN_ERR PFX "No I/O-Address for card detected\n");
- ret = -ENODEV;
- goto err_out_disable_device;
- }
-
- pcipcwd_private.pdev = pdev;
- pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
-
- if (pci_request_regions(pdev, WATCHDOG_NAME)) {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- (int) pcipcwd_private.io_addr);
- ret = -EIO;
- goto err_out_disable_device;
- }
-
- /* get the boot_status */
- pcipcwd_get_status(&pcipcwd_private.boot_status);
-
- /* clear the "card caused reboot" flag */
- pcipcwd_clear_status();
-
- /* disable card */
- pcipcwd_stop();
-
- /* Check whether or not the card supports the temperature device */
- pcipcwd_check_temperature_support();
-
- /* Show info about the card itself */
- pcipcwd_show_card_info();
-
- /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
- if (heartbeat == 0)
- heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (pcipcwd_set_heartbeat(heartbeat)) {
- pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
- WATCHDOG_HEARTBEAT);
- }
-
- ret = register_reboot_notifier(&pcipcwd_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto err_out_release_region;
- }
-
- if (pcipcwd_private.supports_temp) {
- ret = misc_register(&pcipcwd_temp_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
- goto err_out_unregister_reboot;
- }
- }
-
- ret = misc_register(&pcipcwd_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_out_misc_deregister;
- }
-
- printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
- return 0;
-
-err_out_misc_deregister:
- if (pcipcwd_private.supports_temp)
- misc_deregister(&pcipcwd_temp_miscdev);
-err_out_unregister_reboot:
- unregister_reboot_notifier(&pcipcwd_notifier);
-err_out_release_region:
- pci_release_regions(pdev);
-err_out_disable_device:
- pci_disable_device(pdev);
- return ret;
-}
-
-static void __devexit pcipcwd_card_exit(struct pci_dev *pdev)
-{
- /* Stop the timer before we leave */
- if (!nowayout)
- pcipcwd_stop();
-
- /* Deregister */
- misc_deregister(&pcipcwd_miscdev);
- if (pcipcwd_private.supports_temp)
- misc_deregister(&pcipcwd_temp_miscdev);
- unregister_reboot_notifier(&pcipcwd_notifier);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- cards_found--;
-}
-
-static struct pci_device_id pcipcwd_pci_tbl[] = {
- { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
- PCI_ANY_ID, PCI_ANY_ID, },
- { 0 }, /* End of list */
-};
-MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
-
-static struct pci_driver pcipcwd_driver = {
- .name = WATCHDOG_NAME,
- .id_table = pcipcwd_pci_tbl,
- .probe = pcipcwd_card_init,
- .remove = __devexit_p(pcipcwd_card_exit),
-};
-
-static int __init pcipcwd_init_module(void)
-{
- spin_lock_init(&pcipcwd_private.io_lock);
-
- return pci_register_driver(&pcipcwd_driver);
-}
-
-static void __exit pcipcwd_cleanup_module(void)
-{
- pci_unregister_driver(&pcipcwd_driver);
-
- printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
-}
-
-module_init(pcipcwd_init_module);
-module_exit(pcipcwd_cleanup_module);
-
-MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
-MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
+++ /dev/null
-/*
- * Berkshire USB-PC Watchdog Card Driver
- *
- * (c) Copyright 2004-2007 Wim Van Sebroeck <wim@iguana.be>.
- *
- * Based on source code of the following authors:
- * Ken Hollis <kenji@bitgate.com>,
- * Alan Cox <alan@redhat.com>,
- * Matt Domsch <Matt_Domsch@dell.com>,
- * Rob Radez <rob@osinvestor.com>,
- * Greg Kroah-Hartman <greg@kroah.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
- * provide warranty for any of this software. This material is
- * provided "AS-IS" and at no charge.
- *
- * Thanks also to Simon Machell at Berkshire Products Inc. for
- * providing the test hardware. More info is available at
- * http://www.berkprod.com/ or http://www.pcwatchdog.com/
- */
-
-#include <linux/module.h> /* For module specific items */
-#include <linux/moduleparam.h> /* For new moduleparam's */
-#include <linux/types.h> /* For standard types (like size_t) */
-#include <linux/errno.h> /* For the -ENODEV/... values */
-#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/delay.h> /* For mdelay function */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
-#include <linux/watchdog.h> /* For the watchdog specific items */
-#include <linux/notifier.h> /* For notifier support */
-#include <linux/reboot.h> /* For reboot_notifier stuff */
-#include <linux/init.h> /* For __init/__exit/... */
-#include <linux/fs.h> /* For file operations */
-#include <linux/usb.h> /* For USB functions */
-#include <linux/slab.h> /* For kmalloc, ... */
-#include <linux/mutex.h> /* For mutex locking */
-#include <linux/hid.h> /* For HID_REQ_SET_REPORT & HID_DT_REPORT */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-
-
-#ifdef CONFIG_USB_DEBUG
- static int debug = 1;
-#else
- static int debug;
-#endif
-
-/* Use our own dbg macro */
-#undef dbg
-#define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG PFX format "\n" , ## arg); } while (0)
-
-
-/* Module and Version Information */
-#define DRIVER_VERSION "1.02"
-#define DRIVER_DATE "21 Jan 2007"
-#define DRIVER_AUTHOR "Wim Van Sebroeck <wim@iguana.be>"
-#define DRIVER_DESC "Berkshire USB-PC Watchdog driver"
-#define DRIVER_LICENSE "GPL"
-#define DRIVER_NAME "pcwd_usb"
-#define PFX DRIVER_NAME ": "
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE(DRIVER_LICENSE);
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
-
-/* Module Parameters */
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug enabled or not");
-
-#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
-static int heartbeat = WATCHDOG_HEARTBEAT;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/* The vendor and product id's for the USB-PC Watchdog card */
-#define USB_PCWD_VENDOR_ID 0x0c98
-#define USB_PCWD_PRODUCT_ID 0x1140
-
-/* table of devices that work with this driver */
-static struct usb_device_id usb_pcwd_table [] = {
- { USB_DEVICE(USB_PCWD_VENDOR_ID, USB_PCWD_PRODUCT_ID) },
- { } /* Terminating entry */
-};
-MODULE_DEVICE_TABLE (usb, usb_pcwd_table);
-
-/* according to documentation max. time to process a command for the USB
- * watchdog card is 100 or 200 ms, so we give it 250 ms to do it's job */
-#define USB_COMMAND_TIMEOUT 250
-
-/* Watchdog's internal commands */
-#define CMD_READ_TEMP 0x02 /* Read Temperature; Re-trigger Watchdog */
-#define CMD_TRIGGER CMD_READ_TEMP
-#define CMD_GET_STATUS 0x04 /* Get Status Information */
-#define CMD_GET_FIRMWARE_VERSION 0x08 /* Get Firmware Version */
-#define CMD_GET_DIP_SWITCH_SETTINGS 0x0c /* Get Dip Switch Settings */
-#define CMD_READ_WATCHDOG_TIMEOUT 0x18 /* Read Current Watchdog Time */
-#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 /* Write Current Watchdog Time */
-#define CMD_ENABLE_WATCHDOG 0x30 /* Enable / Disable Watchdog */
-#define CMD_DISABLE_WATCHDOG CMD_ENABLE_WATCHDOG
-
-/* Watchdog's Dip Switch heartbeat values */
-static const int heartbeat_tbl [] = {
- 5, /* OFF-OFF-OFF = 5 Sec */
- 10, /* OFF-OFF-ON = 10 Sec */
- 30, /* OFF-ON-OFF = 30 Sec */
- 60, /* OFF-ON-ON = 1 Min */
- 300, /* ON-OFF-OFF = 5 Min */
- 600, /* ON-OFF-ON = 10 Min */
- 1800, /* ON-ON-OFF = 30 Min */
- 3600, /* ON-ON-ON = 1 hour */
-};
-
-/* We can only use 1 card due to the /dev/watchdog restriction */
-static int cards_found;
-
-/* some internal variables */
-static unsigned long is_active;
-static char expect_release;
-
-/* Structure to hold all of our device specific stuff */
-struct usb_pcwd_private {
- struct usb_device * udev; /* save off the usb device pointer */
- struct usb_interface * interface; /* the interface for this device */
-
- unsigned int interface_number; /* the interface number used for cmd's */
-
- unsigned char * intr_buffer; /* the buffer to intr data */
- dma_addr_t intr_dma; /* the dma address for the intr buffer */
- size_t intr_size; /* the size of the intr buffer */
- struct urb * intr_urb; /* the urb used for the intr pipe */
-
- unsigned char cmd_command; /* The command that is reported back */
- unsigned char cmd_data_msb; /* The data MSB that is reported back */
- unsigned char cmd_data_lsb; /* The data LSB that is reported back */
- atomic_t cmd_received; /* true if we received a report after a command */
-
- int exists; /* Wether or not the device exists */
- struct mutex mtx; /* locks this structure */
-};
-static struct usb_pcwd_private *usb_pcwd_device;
-
-/* prevent races between open() and disconnect() */
-static DEFINE_MUTEX(disconnect_mutex);
-
-/* local function prototypes */
-static int usb_pcwd_probe (struct usb_interface *interface, const struct usb_device_id *id);
-static void usb_pcwd_disconnect (struct usb_interface *interface);
-
-/* usb specific object needed to register this driver with the usb subsystem */
-static struct usb_driver usb_pcwd_driver = {
- .name = DRIVER_NAME,
- .probe = usb_pcwd_probe,
- .disconnect = usb_pcwd_disconnect,
- .id_table = usb_pcwd_table,
-};
-
-
-static void usb_pcwd_intr_done(struct urb *urb)
-{
- struct usb_pcwd_private *usb_pcwd = (struct usb_pcwd_private *)urb->context;
- unsigned char *data = usb_pcwd->intr_buffer;
- int retval;
-
- switch (urb->status) {
- case 0: /* success */
- break;
- case -ECONNRESET: /* unlink */
- case -ENOENT:
- case -ESHUTDOWN:
- /* this urb is terminated, clean up */
- dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
- return;
- /* -EPIPE: should clear the halt */
- default: /* error */
- dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
- goto resubmit;
- }
-
- dbg("received following data cmd=0x%02x msb=0x%02x lsb=0x%02x",
- data[0], data[1], data[2]);
-
- usb_pcwd->cmd_command = data[0];
- usb_pcwd->cmd_data_msb = data[1];
- usb_pcwd->cmd_data_lsb = data[2];
-
- /* notify anyone waiting that the cmd has finished */
- atomic_set (&usb_pcwd->cmd_received, 1);
-
-resubmit:
- retval = usb_submit_urb (urb, GFP_ATOMIC);
- if (retval)
- printk(KERN_ERR PFX "can't resubmit intr, usb_submit_urb failed with result %d\n",
- retval);
-}
-
-static int usb_pcwd_send_command(struct usb_pcwd_private *usb_pcwd, unsigned char cmd,
- unsigned char *msb, unsigned char *lsb)
-{
- int got_response, count;
- unsigned char buf[6];
-
- /* We will not send any commands if the USB PCWD device does not exist */
- if ((!usb_pcwd) || (!usb_pcwd->exists))
- return -1;
-
- /* The USB PC Watchdog uses a 6 byte report format. The board currently uses
- * only 3 of the six bytes of the report. */
- buf[0] = cmd; /* Byte 0 = CMD */
- buf[1] = *msb; /* Byte 1 = Data MSB */
- buf[2] = *lsb; /* Byte 2 = Data LSB */
- buf[3] = buf[4] = buf[5] = 0; /* All other bytes not used */
-
- dbg("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x",
- buf[0], buf[1], buf[2]);
-
- atomic_set (&usb_pcwd->cmd_received, 0);
-
- if (usb_control_msg(usb_pcwd->udev, usb_sndctrlpipe(usb_pcwd->udev, 0),
- HID_REQ_SET_REPORT, HID_DT_REPORT,
- 0x0200, usb_pcwd->interface_number, buf, sizeof(buf),
- USB_COMMAND_TIMEOUT) != sizeof(buf)) {
- dbg("usb_pcwd_send_command: error in usb_control_msg for cmd 0x%x 0x%x 0x%x\n", cmd, *msb, *lsb);
- }
- /* wait till the usb card processed the command,
- * with a max. timeout of USB_COMMAND_TIMEOUT */
- got_response = 0;
- for (count = 0; (count < USB_COMMAND_TIMEOUT) && (!got_response); count++) {
- mdelay(1);
- if (atomic_read (&usb_pcwd->cmd_received))
- got_response = 1;
- }
-
- if ((got_response) && (cmd == usb_pcwd->cmd_command)) {
- /* read back response */
- *msb = usb_pcwd->cmd_data_msb;
- *lsb = usb_pcwd->cmd_data_lsb;
- }
-
- return got_response;
-}
-
-static int usb_pcwd_start(struct usb_pcwd_private *usb_pcwd)
-{
- unsigned char msb = 0x00;
- unsigned char lsb = 0x00;
- int retval;
-
- /* Enable Watchdog */
- retval = usb_pcwd_send_command(usb_pcwd, CMD_ENABLE_WATCHDOG, &msb, &lsb);
-
- if ((retval == 0) || (lsb == 0)) {
- printk(KERN_ERR PFX "Card did not acknowledge enable attempt\n");
- return -1;
- }
-
- return 0;
-}
-
-static int usb_pcwd_stop(struct usb_pcwd_private *usb_pcwd)
-{
- unsigned char msb = 0xA5;
- unsigned char lsb = 0xC3;
- int retval;
-
- /* Disable Watchdog */
- retval = usb_pcwd_send_command(usb_pcwd, CMD_DISABLE_WATCHDOG, &msb, &lsb);
-
- if ((retval == 0) || (lsb != 0)) {
- printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
- return -1;
- }
-
- return 0;
-}
-
-static int usb_pcwd_keepalive(struct usb_pcwd_private *usb_pcwd)
-{
- unsigned char dummy;
-
- /* Re-trigger Watchdog */
- usb_pcwd_send_command(usb_pcwd, CMD_TRIGGER, &dummy, &dummy);
-
- return 0;
-}
-
-static int usb_pcwd_set_heartbeat(struct usb_pcwd_private *usb_pcwd, int t)
-{
- unsigned char msb = t / 256;
- unsigned char lsb = t % 256;
-
- if ((t < 0x0001) || (t > 0xFFFF))
- return -EINVAL;
-
- /* Write new heartbeat to watchdog */
- usb_pcwd_send_command(usb_pcwd, CMD_WRITE_WATCHDOG_TIMEOUT, &msb, &lsb);
-
- heartbeat = t;
- return 0;
-}
-
-static int usb_pcwd_get_temperature(struct usb_pcwd_private *usb_pcwd, int *temperature)
-{
- unsigned char msb, lsb;
-
- usb_pcwd_send_command(usb_pcwd, CMD_READ_TEMP, &msb, &lsb);
-
- /*
- * Convert celsius to fahrenheit, since this was
- * the decided 'standard' for this return value.
- */
- *temperature = (lsb * 9 / 5) + 32;
-
- return 0;
-}
-
-static int usb_pcwd_get_timeleft(struct usb_pcwd_private *usb_pcwd, int *time_left)
-{
- unsigned char msb, lsb;
-
- /* Read the time that's left before rebooting */
- /* Note: if the board is not yet armed then we will read 0xFFFF */
- usb_pcwd_send_command(usb_pcwd, CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
-
- *time_left = (msb << 8) + lsb;
-
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t usb_pcwd_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- expect_release = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if(get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_release = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- usb_pcwd_keepalive(usb_pcwd_device);
- }
- return len;
-}
-
-static int usb_pcwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = DRIVER_NAME,
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_GETTEMP:
- {
- int temperature;
-
- if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature))
- return -EFAULT;
-
- return put_user(temperature, p);
- }
-
- case WDIOC_KEEPALIVE:
- usb_pcwd_keepalive(usb_pcwd_device);
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if (get_user (new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- usb_pcwd_stop(usb_pcwd_device);
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- usb_pcwd_start(usb_pcwd_device);
- retval = 0;
- }
-
- return retval;
- }
-
- case WDIOC_SETTIMEOUT:
- {
- int new_heartbeat;
-
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (usb_pcwd_set_heartbeat(usb_pcwd_device, new_heartbeat))
- return -EINVAL;
-
- usb_pcwd_keepalive(usb_pcwd_device);
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
-
- case WDIOC_GETTIMELEFT:
- {
- int time_left;
-
- if (usb_pcwd_get_timeleft(usb_pcwd_device, &time_left))
- return -EFAULT;
-
- return put_user(time_left, p);
- }
-
- default:
- return -ENOTTY;
- }
-}
-
-static int usb_pcwd_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &is_active))
- return -EBUSY;
-
- /* Activate */
- usb_pcwd_start(usb_pcwd_device);
- usb_pcwd_keepalive(usb_pcwd_device);
- return nonseekable_open(inode, file);
-}
-
-static int usb_pcwd_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- */
- if (expect_release == 42) {
- usb_pcwd_stop(usb_pcwd_device);
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- usb_pcwd_keepalive(usb_pcwd_device);
- }
- expect_release = 0;
- clear_bit(0, &is_active);
- return 0;
-}
-
-/*
- * /dev/temperature handling
- */
-
-static ssize_t usb_pcwd_temperature_read(struct file *file, char __user *data,
- size_t len, loff_t *ppos)
-{
- int temperature;
-
- if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature))
- return -EFAULT;
-
- if (copy_to_user(data, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-static int usb_pcwd_temperature_open(struct inode *inode, struct file *file)
-{
- return nonseekable_open(inode, file);
-}
-
-static int usb_pcwd_temperature_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-/*
- * Notify system
- */
-
-static int usb_pcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- usb_pcwd_stop(usb_pcwd_device);
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations usb_pcwd_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = usb_pcwd_write,
- .ioctl = usb_pcwd_ioctl,
- .open = usb_pcwd_open,
- .release = usb_pcwd_release,
-};
-
-static struct miscdevice usb_pcwd_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &usb_pcwd_fops,
-};
-
-static const struct file_operations usb_pcwd_temperature_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = usb_pcwd_temperature_read,
- .open = usb_pcwd_temperature_open,
- .release = usb_pcwd_temperature_release,
-};
-
-static struct miscdevice usb_pcwd_temperature_miscdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &usb_pcwd_temperature_fops,
-};
-
-static struct notifier_block usb_pcwd_notifier = {
- .notifier_call = usb_pcwd_notify_sys,
-};
-
-/**
- * usb_pcwd_delete
- */
-static inline void usb_pcwd_delete (struct usb_pcwd_private *usb_pcwd)
-{
- usb_free_urb(usb_pcwd->intr_urb);
- if (usb_pcwd->intr_buffer != NULL)
- usb_buffer_free(usb_pcwd->udev, usb_pcwd->intr_size,
- usb_pcwd->intr_buffer, usb_pcwd->intr_dma);
- kfree (usb_pcwd);
-}
-
-/**
- * usb_pcwd_probe
- *
- * Called by the usb core when a new device is connected that it thinks
- * this driver might be interested in.
- */
-static int usb_pcwd_probe(struct usb_interface *interface, const struct usb_device_id *id)
-{
- struct usb_device *udev = interface_to_usbdev(interface);
- struct usb_host_interface *iface_desc;
- struct usb_endpoint_descriptor *endpoint;
- struct usb_pcwd_private *usb_pcwd = NULL;
- int pipe, maxp;
- int retval = -ENOMEM;
- int got_fw_rev;
- unsigned char fw_rev_major, fw_rev_minor;
- char fw_ver_str[20];
- unsigned char option_switches, dummy;
-
- cards_found++;
- if (cards_found > 1) {
- printk(KERN_ERR PFX "This driver only supports 1 device\n");
- return -ENODEV;
- }
-
- /* get the active interface descriptor */
- iface_desc = interface->cur_altsetting;
-
- /* check out that we have a HID device */
- if (!(iface_desc->desc.bInterfaceClass == USB_CLASS_HID)) {
- printk(KERN_ERR PFX "The device isn't a Human Interface Device\n");
- return -ENODEV;
- }
-
- /* check out the endpoint: it has to be Interrupt & IN */
- endpoint = &iface_desc->endpoint[0].desc;
-
- if (!((endpoint->bEndpointAddress & USB_DIR_IN) &&
- ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
- == USB_ENDPOINT_XFER_INT))) {
- /* we didn't find a Interrupt endpoint with direction IN */
- printk(KERN_ERR PFX "Couldn't find an INTR & IN endpoint\n");
- return -ENODEV;
- }
-
- /* get a handle to the interrupt data pipe */
- pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
- maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
-
- /* allocate memory for our device and initialize it */
- usb_pcwd = kzalloc (sizeof(struct usb_pcwd_private), GFP_KERNEL);
- if (usb_pcwd == NULL) {
- printk(KERN_ERR PFX "Out of memory\n");
- goto error;
- }
-
- usb_pcwd_device = usb_pcwd;
-
- mutex_init(&usb_pcwd->mtx);
- usb_pcwd->udev = udev;
- usb_pcwd->interface = interface;
- usb_pcwd->interface_number = iface_desc->desc.bInterfaceNumber;
- usb_pcwd->intr_size = (le16_to_cpu(endpoint->wMaxPacketSize) > 8 ? le16_to_cpu(endpoint->wMaxPacketSize) : 8);
-
- /* set up the memory buffer's */
- if (!(usb_pcwd->intr_buffer = usb_buffer_alloc(udev, usb_pcwd->intr_size, GFP_ATOMIC, &usb_pcwd->intr_dma))) {
- printk(KERN_ERR PFX "Out of memory\n");
- goto error;
- }
-
- /* allocate the urb's */
- usb_pcwd->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!usb_pcwd->intr_urb) {
- printk(KERN_ERR PFX "Out of memory\n");
- goto error;
- }
-
- /* initialise the intr urb's */
- usb_fill_int_urb(usb_pcwd->intr_urb, udev, pipe,
- usb_pcwd->intr_buffer, usb_pcwd->intr_size,
- usb_pcwd_intr_done, usb_pcwd, endpoint->bInterval);
- usb_pcwd->intr_urb->transfer_dma = usb_pcwd->intr_dma;
- usb_pcwd->intr_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-
- /* register our interrupt URB with the USB system */
- if (usb_submit_urb(usb_pcwd->intr_urb, GFP_KERNEL)) {
- printk(KERN_ERR PFX "Problem registering interrupt URB\n");
- retval = -EIO; /* failure */
- goto error;
- }
-
- /* The device exists and can be communicated with */
- usb_pcwd->exists = 1;
-
- /* disable card */
- usb_pcwd_stop(usb_pcwd);
-
- /* Get the Firmware Version */
- got_fw_rev = usb_pcwd_send_command(usb_pcwd, CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
- if (got_fw_rev) {
- sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
- } else {
- sprintf(fw_ver_str, "<card no answer>");
- }
-
- printk(KERN_INFO PFX "Found card (Firmware: %s) with temp option\n",
- fw_ver_str);
-
- /* Get switch settings */
- usb_pcwd_send_command(usb_pcwd, CMD_GET_DIP_SWITCH_SETTINGS, &dummy, &option_switches);
-
- printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
- option_switches,
- ((option_switches & 0x10) ? "ON" : "OFF"),
- ((option_switches & 0x08) ? "ON" : "OFF"));
-
- /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
- if (heartbeat == 0)
- heartbeat = heartbeat_tbl[(option_switches & 0x07)];
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (usb_pcwd_set_heartbeat(usb_pcwd, heartbeat)) {
- usb_pcwd_set_heartbeat(usb_pcwd, WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
- WATCHDOG_HEARTBEAT);
- }
-
- retval = register_reboot_notifier(&usb_pcwd_notifier);
- if (retval != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- retval);
- goto error;
- }
-
- retval = misc_register(&usb_pcwd_temperature_miscdev);
- if (retval != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, retval);
- goto err_out_unregister_reboot;
- }
-
- retval = misc_register(&usb_pcwd_miscdev);
- if (retval != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, retval);
- goto err_out_misc_deregister;
- }
-
- /* we can register the device now, as it is ready */
- usb_set_intfdata (interface, usb_pcwd);
-
- printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
- return 0;
-
-err_out_misc_deregister:
- misc_deregister(&usb_pcwd_temperature_miscdev);
-err_out_unregister_reboot:
- unregister_reboot_notifier(&usb_pcwd_notifier);
-error:
- if (usb_pcwd)
- usb_pcwd_delete(usb_pcwd);
- usb_pcwd_device = NULL;
- return retval;
-}
-
-
-/**
- * usb_pcwd_disconnect
- *
- * Called by the usb core when the device is removed from the system.
- *
- * This routine guarantees that the driver will not submit any more urbs
- * by clearing dev->udev.
- */
-static void usb_pcwd_disconnect(struct usb_interface *interface)
-{
- struct usb_pcwd_private *usb_pcwd;
-
- /* prevent races with open() */
- mutex_lock(&disconnect_mutex);
-
- usb_pcwd = usb_get_intfdata (interface);
- usb_set_intfdata (interface, NULL);
-
- mutex_lock(&usb_pcwd->mtx);
-
- /* Stop the timer before we leave */
- if (!nowayout)
- usb_pcwd_stop(usb_pcwd);
-
- /* We should now stop communicating with the USB PCWD device */
- usb_pcwd->exists = 0;
-
- /* Deregister */
- misc_deregister(&usb_pcwd_miscdev);
- misc_deregister(&usb_pcwd_temperature_miscdev);
- unregister_reboot_notifier(&usb_pcwd_notifier);
-
- mutex_unlock(&usb_pcwd->mtx);
-
- /* Delete the USB PCWD device */
- usb_pcwd_delete(usb_pcwd);
-
- cards_found--;
-
- mutex_unlock(&disconnect_mutex);
-
- printk(KERN_INFO PFX "USB PC Watchdog disconnected\n");
-}
-
-
-
-/**
- * usb_pcwd_init
- */
-static int __init usb_pcwd_init(void)
-{
- int result;
-
- /* register this driver with the USB subsystem */
- result = usb_register(&usb_pcwd_driver);
- if (result) {
- printk(KERN_ERR PFX "usb_register failed. Error number %d\n",
- result);
- return result;
- }
-
- printk(KERN_INFO PFX DRIVER_DESC " v" DRIVER_VERSION " (" DRIVER_DATE ")\n");
- return 0;
-}
-
-
-/**
- * usb_pcwd_exit
- */
-static void __exit usb_pcwd_exit(void)
-{
- /* deregister this driver with the USB subsystem */
- usb_deregister(&usb_pcwd_driver);
-}
-
-
-module_init (usb_pcwd_init);
-module_exit (usb_pcwd_exit);
+++ /dev/null
-/*
- * drivers/char/watchdog/pnx4008_wdt.c
- *
- * Watchdog driver for PNX4008 board
- *
- * Authors: Dmitry Chigirev <source@mvista.com>,
- * Vitaly Wool <vitalywool@gmail.com>
- * Based on sa1100 driver,
- * Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
- *
- * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/ioport.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/spinlock.h>
-
-#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define MODULE_NAME "PNX4008-WDT: "
-
-/* WatchDog Timer - Chapter 23 Page 207 */
-
-#define DEFAULT_HEARTBEAT 19
-#define MAX_HEARTBEAT 60
-
-/* Watchdog timer register set definition */
-#define WDTIM_INT(p) ((p) + 0x0)
-#define WDTIM_CTRL(p) ((p) + 0x4)
-#define WDTIM_COUNTER(p) ((p) + 0x8)
-#define WDTIM_MCTRL(p) ((p) + 0xC)
-#define WDTIM_MATCH0(p) ((p) + 0x10)
-#define WDTIM_EMR(p) ((p) + 0x14)
-#define WDTIM_PULSE(p) ((p) + 0x18)
-#define WDTIM_RES(p) ((p) + 0x1C)
-
-/* WDTIM_INT bit definitions */
-#define MATCH_INT 1
-
-/* WDTIM_CTRL bit definitions */
-#define COUNT_ENAB 1
-#define RESET_COUNT (1<<1)
-#define DEBUG_EN (1<<2)
-
-/* WDTIM_MCTRL bit definitions */
-#define MR0_INT 1
-#undef RESET_COUNT0
-#define RESET_COUNT0 (1<<2)
-#define STOP_COUNT0 (1<<2)
-#define M_RES1 (1<<3)
-#define M_RES2 (1<<4)
-#define RESFRC1 (1<<5)
-#define RESFRC2 (1<<6)
-
-/* WDTIM_EMR bit definitions */
-#define EXT_MATCH0 1
-#define MATCH_OUTPUT_HIGH (2<<4) /*a MATCH_CTRL setting */
-
-/* WDTIM_RES bit definitions */
-#define WDOG_RESET 1 /* read only */
-
-#define WDOG_COUNTER_RATE 13000000 /*the counter clock is 13 MHz fixed */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static int heartbeat = DEFAULT_HEARTBEAT;
-
-static spinlock_t io_lock;
-static unsigned long wdt_status;
-#define WDT_IN_USE 0
-#define WDT_OK_TO_CLOSE 1
-#define WDT_REGION_INITED 2
-#define WDT_DEVICE_INITED 3
-
-static unsigned long boot_status;
-
-static struct resource *wdt_mem;
-static void __iomem *wdt_base;
-struct clk *wdt_clk;
-
-static void wdt_enable(void)
-{
- spin_lock(&io_lock);
-
- if (wdt_clk)
- clk_set_rate(wdt_clk, 1);
-
- /* stop counter, initiate counter reset */
- __raw_writel(RESET_COUNT, WDTIM_CTRL(wdt_base));
- /*wait for reset to complete. 100% guarantee event */
- while (__raw_readl(WDTIM_COUNTER(wdt_base)))
- cpu_relax();
- /* internal and external reset, stop after that */
- __raw_writel(M_RES2 | STOP_COUNT0 | RESET_COUNT0,
- WDTIM_MCTRL(wdt_base));
- /* configure match output */
- __raw_writel(MATCH_OUTPUT_HIGH, WDTIM_EMR(wdt_base));
- /* clear interrupt, just in case */
- __raw_writel(MATCH_INT, WDTIM_INT(wdt_base));
- /* the longest pulse period 65541/(13*10^6) seconds ~ 5 ms. */
- __raw_writel(0xFFFF, WDTIM_PULSE(wdt_base));
- __raw_writel(heartbeat * WDOG_COUNTER_RATE, WDTIM_MATCH0(wdt_base));
- /*enable counter, stop when debugger active */
- __raw_writel(COUNT_ENAB | DEBUG_EN, WDTIM_CTRL(wdt_base));
-
- spin_unlock(&io_lock);
-}
-
-static void wdt_disable(void)
-{
- spin_lock(&io_lock);
-
- __raw_writel(0, WDTIM_CTRL(wdt_base)); /*stop counter */
- if (wdt_clk)
- clk_set_rate(wdt_clk, 0);
-
- spin_unlock(&io_lock);
-}
-
-static int pnx4008_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(WDT_IN_USE, &wdt_status))
- return -EBUSY;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static ssize_t
-pnx4008_wdt_write(struct file *file, const char *data, size_t len,
- loff_t * ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- set_bit(WDT_OK_TO_CLOSE, &wdt_status);
- }
- }
- wdt_enable();
- }
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = "PNX4008 Watchdog",
-};
-
-static int
-pnx4008_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY;
- int time;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user((struct watchdog_info *)arg, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, (int *)arg);
- if (ret)
- break;
-
- if (time <= 0 || time > MAX_HEARTBEAT) {
- ret = -EINVAL;
- break;
- }
-
- heartbeat = time;
- wdt_enable();
- /* Fall through */
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(heartbeat, (int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_enable();
- ret = 0;
- break;
- }
- return ret;
-}
-
-static int pnx4008_wdt_release(struct inode *inode, struct file *file)
-{
- if (!test_bit(WDT_OK_TO_CLOSE, &wdt_status))
- printk(KERN_WARNING "WATCHDOG: Device closed unexpectdly\n");
-
- wdt_disable();
- clear_bit(WDT_IN_USE, &wdt_status);
- clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
- return 0;
-}
-
-static const struct file_operations pnx4008_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = pnx4008_wdt_write,
- .ioctl = pnx4008_wdt_ioctl,
- .open = pnx4008_wdt_open,
- .release = pnx4008_wdt_release,
-};
-
-static struct miscdevice pnx4008_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &pnx4008_wdt_fops,
-};
-
-static int pnx4008_wdt_probe(struct platform_device *pdev)
-{
- int ret = 0, size;
- struct resource *res;
-
- spin_lock_init(&io_lock);
-
- if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT)
- heartbeat = DEFAULT_HEARTBEAT;
-
- printk(KERN_INFO MODULE_NAME
- "PNX4008 Watchdog Timer: heartbeat %d sec\n", heartbeat);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- printk(KERN_INFO MODULE_NAME
- "failed to get memory region resouce\n");
- return -ENOENT;
- }
-
- size = res->end - res->start + 1;
- wdt_mem = request_mem_region(res->start, size, pdev->name);
-
- if (wdt_mem == NULL) {
- printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
- return -ENOENT;
- }
- wdt_base = (void __iomem *)IO_ADDRESS(res->start);
-
- wdt_clk = clk_get(&pdev->dev, "wdt_ck");
- if (IS_ERR(wdt_clk)) {
- ret = PTR_ERR(wdt_clk);
- release_resource(wdt_mem);
- kfree(wdt_mem);
- goto out;
- } else
- clk_set_rate(wdt_clk, 1);
-
- ret = misc_register(&pnx4008_wdt_miscdev);
- if (ret < 0) {
- printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
- release_resource(wdt_mem);
- kfree(wdt_mem);
- clk_set_rate(wdt_clk, 0);
- } else {
- boot_status = (__raw_readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ?
- WDIOF_CARDRESET : 0;
- wdt_disable(); /*disable for now */
- set_bit(WDT_DEVICE_INITED, &wdt_status);
- }
-
-out:
- return ret;
-}
-
-static int pnx4008_wdt_remove(struct platform_device *pdev)
-{
- misc_deregister(&pnx4008_wdt_miscdev);
- if (wdt_clk) {
- clk_set_rate(wdt_clk, 0);
- clk_put(wdt_clk);
- wdt_clk = NULL;
- }
- if (wdt_mem) {
- release_resource(wdt_mem);
- kfree(wdt_mem);
- wdt_mem = NULL;
- }
- return 0;
-}
-
-static struct platform_driver platform_wdt_driver = {
- .driver = {
- .name = "watchdog",
- },
- .probe = pnx4008_wdt_probe,
- .remove = pnx4008_wdt_remove,
-};
-
-static int __init pnx4008_wdt_init(void)
-{
- return platform_driver_register(&platform_wdt_driver);
-}
-
-static void __exit pnx4008_wdt_exit(void)
-{
- return platform_driver_unregister(&platform_wdt_driver);
-}
-
-module_init(pnx4008_wdt_init);
-module_exit(pnx4008_wdt_exit);
-
-MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
-MODULE_DESCRIPTION("PNX4008 Watchdog Driver");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat,
- "Watchdog heartbeat period in seconds from 1 to "
- __MODULE_STRING(MAX_HEARTBEAT) ", default "
- __MODULE_STRING(DEFAULT_HEARTBEAT));
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout,
- "Set to 1 to keep watchdog running after device release");
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog implementation for GPI h/w found on PMC-Sierra RM9xxx
- * chips.
- *
- * Copyright (C) 2004 by Basler Vision Technologies AG
- * Author: Thomas Koeller <thomas.koeller@baslerweb.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/notifier.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <asm/io.h>
-#include <asm/atomic.h>
-#include <asm/processor.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/rm9k-ocd.h>
-
-#include <rm9k_wdt.h>
-
-
-#define CLOCK 125000000
-#define MAX_TIMEOUT_SECONDS 32
-#define CPCCR 0x0080
-#define CPGIG1SR 0x0044
-#define CPGIG1ER 0x0054
-
-
-/* Function prototypes */
-static irqreturn_t wdt_gpi_irqhdl(int, void *);
-static void wdt_gpi_start(void);
-static void wdt_gpi_stop(void);
-static void wdt_gpi_set_timeout(unsigned int);
-static int wdt_gpi_open(struct inode *, struct file *);
-static int wdt_gpi_release(struct inode *, struct file *);
-static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *);
-static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long);
-static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *);
-static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int);
-static int __init wdt_gpi_probe(struct device *);
-static int __exit wdt_gpi_remove(struct device *);
-
-
-static const char wdt_gpi_name[] = "wdt_gpi";
-static atomic_t opencnt;
-static int expect_close;
-static int locked;
-
-
-/* These are set from device resources */
-static void __iomem * wd_regs;
-static unsigned int wd_irq, wd_ctr;
-
-
-/* Module arguments */
-static int timeout = MAX_TIMEOUT_SECONDS;
-module_param(timeout, int, 0444);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds");
-
-static unsigned long resetaddr = 0xbffdc200;
-module_param(resetaddr, ulong, 0444);
-MODULE_PARM_DESC(resetaddr, "Address to write to to force a reset");
-
-static unsigned long flagaddr = 0xbffdc104;
-module_param(flagaddr, ulong, 0444);
-MODULE_PARM_DESC(flagaddr, "Address to write to boot flags to");
-
-static int powercycle;
-module_param(powercycle, bool, 0444);
-MODULE_PARM_DESC(powercycle, "Cycle power if watchdog expires");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, bool, 0444);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be disabled once started");
-
-
-/* Kernel interfaces */
-static const struct file_operations fops = {
- .owner = THIS_MODULE,
- .open = wdt_gpi_open,
- .release = wdt_gpi_release,
- .write = wdt_gpi_write,
- .unlocked_ioctl = wdt_gpi_ioctl,
-};
-
-static struct miscdevice miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = wdt_gpi_name,
- .fops = &fops,
-};
-
-static struct notifier_block wdt_gpi_shutdown = {
- .notifier_call = wdt_gpi_notify,
-};
-
-
-/* Interrupt handler */
-static irqreturn_t wdt_gpi_irqhdl(int irq, void *ctxt)
-{
- if (!unlikely(__raw_readl(wd_regs + 0x0008) & 0x1))
- return IRQ_NONE;
- __raw_writel(0x1, wd_regs + 0x0008);
-
-
- printk(KERN_CRIT "%s: watchdog expired - resetting system\n",
- wdt_gpi_name);
-
- *(volatile char *) flagaddr |= 0x01;
- *(volatile char *) resetaddr = powercycle ? 0x01 : 0x2;
- iob();
- while (1)
- cpu_relax();
-}
-
-
-/* Watchdog functions */
-static void wdt_gpi_start(void)
-{
- u32 reg;
-
- lock_titan_regs();
- reg = titan_readl(CPGIG1ER);
- titan_writel(reg | (0x100 << wd_ctr), CPGIG1ER);
- iob();
- unlock_titan_regs();
-}
-
-static void wdt_gpi_stop(void)
-{
- u32 reg;
-
- lock_titan_regs();
- reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
- titan_writel(reg, CPCCR);
- reg = titan_readl(CPGIG1ER);
- titan_writel(reg & ~(0x100 << wd_ctr), CPGIG1ER);
- iob();
- unlock_titan_regs();
-}
-
-static void wdt_gpi_set_timeout(unsigned int to)
-{
- u32 reg;
- const u32 wdval = (to * CLOCK) & ~0x0000000f;
-
- lock_titan_regs();
- reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
- titan_writel(reg, CPCCR);
- wmb();
- __raw_writel(wdval, wd_regs + 0x0000);
- wmb();
- titan_writel(reg | (0x2 << (wd_ctr * 4)), CPCCR);
- wmb();
- titan_writel(reg | (0x5 << (wd_ctr * 4)), CPCCR);
- iob();
- unlock_titan_regs();
-}
-
-
-/* /dev/watchdog operations */
-static int wdt_gpi_open(struct inode *inode, struct file *file)
-{
- int res;
-
- if (unlikely(atomic_dec_if_positive(&opencnt) < 0))
- return -EBUSY;
-
- expect_close = 0;
- if (locked) {
- module_put(THIS_MODULE);
- free_irq(wd_irq, &miscdev);
- locked = 0;
- }
-
- res = request_irq(wd_irq, wdt_gpi_irqhdl, IRQF_SHARED | IRQF_DISABLED,
- wdt_gpi_name, &miscdev);
- if (unlikely(res))
- return res;
-
- wdt_gpi_set_timeout(timeout);
- wdt_gpi_start();
-
- printk(KERN_INFO "%s: watchdog started, timeout = %u seconds\n",
- wdt_gpi_name, timeout);
- return nonseekable_open(inode, file);
-}
-
-static int wdt_gpi_release(struct inode *inode, struct file *file)
-{
- if (nowayout) {
- printk(KERN_INFO "%s: no way out - watchdog left running\n",
- wdt_gpi_name);
- __module_get(THIS_MODULE);
- locked = 1;
- } else {
- if (expect_close) {
- wdt_gpi_stop();
- free_irq(wd_irq, &miscdev);
- printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name);
- } else {
- printk(KERN_CRIT "%s: unexpected close() -"
- " watchdog left running\n",
- wdt_gpi_name);
- wdt_gpi_set_timeout(timeout);
- __module_get(THIS_MODULE);
- locked = 1;
- }
- }
-
- atomic_inc(&opencnt);
- return 0;
-}
-
-static ssize_t
-wdt_gpi_write(struct file *f, const char __user *d, size_t s, loff_t *o)
-{
- char val;
-
- wdt_gpi_set_timeout(timeout);
- expect_close = (s > 0) && !get_user(val, d) && (val == 'V');
- return s ? 1 : 0;
-}
-
-static long
-wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
-{
- long res = -ENOTTY;
- const long size = _IOC_SIZE(cmd);
- int stat;
- void __user *argp = (void __user *)arg;
- static struct watchdog_info wdinfo = {
- .identity = "RM9xxx/GPI watchdog",
- .firmware_version = 0,
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
- };
-
- if (unlikely(_IOC_TYPE(cmd) != WATCHDOG_IOCTL_BASE))
- return -ENOTTY;
-
- if ((_IOC_DIR(cmd) & _IOC_READ)
- && !access_ok(VERIFY_WRITE, arg, size))
- return -EFAULT;
-
- if ((_IOC_DIR(cmd) & _IOC_WRITE)
- && !access_ok(VERIFY_READ, arg, size))
- return -EFAULT;
-
- expect_close = 0;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- wdinfo.options = nowayout ?
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING :
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE;
- res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size;
- break;
-
- case WDIOC_GETSTATUS:
- break;
-
- case WDIOC_GETBOOTSTATUS:
- stat = (*(volatile char *) flagaddr & 0x01)
- ? WDIOF_CARDRESET : 0;
- res = __copy_to_user(argp, &stat, size) ?
- -EFAULT : size;
- break;
-
- case WDIOC_SETOPTIONS:
- break;
-
- case WDIOC_KEEPALIVE:
- wdt_gpi_set_timeout(timeout);
- res = size;
- break;
-
- case WDIOC_SETTIMEOUT:
- {
- int val;
- if (unlikely(__copy_from_user(&val, argp, size))) {
- res = -EFAULT;
- break;
- }
-
- if (val > MAX_TIMEOUT_SECONDS)
- val = MAX_TIMEOUT_SECONDS;
- timeout = val;
- wdt_gpi_set_timeout(val);
- res = size;
- printk(KERN_INFO "%s: timeout set to %u seconds\n",
- wdt_gpi_name, timeout);
- }
- break;
-
- case WDIOC_GETTIMEOUT:
- res = __copy_to_user(argp, &timeout, size) ?
- -EFAULT : size;
- break;
- }
-
- return res;
-}
-
-
-/* Shutdown notifier */
-static int
-wdt_gpi_notify(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- wdt_gpi_stop();
-
- return NOTIFY_DONE;
-}
-
-
-/* Init & exit procedures */
-static const struct resource *
-wdt_gpi_get_resource(struct platform_device *pdv, const char *name,
- unsigned int type)
-{
- char buf[80];
- if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
- return NULL;
- return platform_get_resource_byname(pdv, type, buf);
-}
-
-/* No hotplugging on the platform bus - use __init */
-static int __init wdt_gpi_probe(struct device *dev)
-{
- int res;
- struct platform_device * const pdv = to_platform_device(dev);
- const struct resource
- * const rr = wdt_gpi_get_resource(pdv, WDT_RESOURCE_REGS,
- IORESOURCE_MEM),
- * const ri = wdt_gpi_get_resource(pdv, WDT_RESOURCE_IRQ,
- IORESOURCE_IRQ),
- * const rc = wdt_gpi_get_resource(pdv, WDT_RESOURCE_COUNTER,
- 0);
-
- if (unlikely(!rr || !ri || !rc))
- return -ENXIO;
-
- wd_regs = ioremap_nocache(rr->start, rr->end + 1 - rr->start);
- if (unlikely(!wd_regs))
- return -ENOMEM;
- wd_irq = ri->start;
- wd_ctr = rc->start;
- res = misc_register(&miscdev);
- if (res)
- iounmap(wd_regs);
- else
- register_reboot_notifier(&wdt_gpi_shutdown);
- return res;
-}
-
-static int __exit wdt_gpi_remove(struct device *dev)
-{
- int res;
-
- unregister_reboot_notifier(&wdt_gpi_shutdown);
- res = misc_deregister(&miscdev);
- iounmap(wd_regs);
- wd_regs = NULL;
- return res;
-}
-
-
-/* Device driver init & exit */
-static struct device_driver wdt_gpi_driver = {
- .name = (char *) wdt_gpi_name,
- .bus = &platform_bus_type,
- .owner = THIS_MODULE,
- .probe = wdt_gpi_probe,
- .remove = __exit_p(wdt_gpi_remove),
- .shutdown = NULL,
- .suspend = NULL,
- .resume = NULL,
-};
-
-static int __init wdt_gpi_init_module(void)
-{
- atomic_set(&opencnt, 1);
- if (timeout > MAX_TIMEOUT_SECONDS)
- timeout = MAX_TIMEOUT_SECONDS;
- return driver_register(&wdt_gpi_driver);
-}
-
-static void __exit wdt_gpi_cleanup_module(void)
-{
- driver_unregister(&wdt_gpi_driver);
-}
-
-module_init(wdt_gpi_init_module);
-module_exit(wdt_gpi_cleanup_module);
-
-MODULE_AUTHOR("Thomas Koeller <thomas.koeller@baslerweb.com>");
-MODULE_DESCRIPTION("Basler eXcite watchdog driver for gpi devices");
-MODULE_VERSION("0.1");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
+++ /dev/null
-/* linux/drivers/char/watchdog/s3c2410_wdt.c
- *
- * Copyright (c) 2004 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2410 Watchdog Timer Support
- *
- * Based on, softdog.c by Alan Cox,
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Changelog:
- * 05-Oct-2004 BJD Added semaphore init to stop crashes on open
- * Fixed tmr_count / wdt_count confusion
- * Added configurable debug
- *
- * 11-Jan-2005 BJD Fixed divide-by-2 in timeout code
- *
- * 25-Jan-2005 DA Added suspend/resume support
- * Replaced reboot notifier with .shutdown method
- *
- * 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
-*/
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#include <asm/arch/map.h>
-
-#undef S3C_VA_WATCHDOG
-#define S3C_VA_WATCHDOG (0)
-
-#include <asm/plat-s3c/regs-watchdog.h>
-
-#define PFX "s3c2410-wdt: "
-
-#define CONFIG_S3C2410_WATCHDOG_ATBOOT (0)
-#define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15)
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME;
-static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT;
-static int soft_noboot = 0;
-static int debug = 0;
-
-module_param(tmr_margin, int, 0);
-module_param(tmr_atboot, int, 0);
-module_param(nowayout, int, 0);
-module_param(soft_noboot, int, 0);
-module_param(debug, int, 0);
-
-MODULE_PARM_DESC(tmr_margin, "Watchdog tmr_margin in seconds. default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME) ")");
-
-MODULE_PARM_DESC(tmr_atboot, "Watchdog is started at boot time if set to 1, default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_ATBOOT));
-
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
-
-MODULE_PARM_DESC(debug, "Watchdog debug, set to >1 for debug, (default 0)");
-
-
-typedef enum close_state {
- CLOSE_STATE_NOT,
- CLOSE_STATE_ALLOW=0x4021
-} close_state_t;
-
-static DECLARE_MUTEX(open_lock);
-
-static struct device *wdt_dev; /* platform device attached to */
-static struct resource *wdt_mem;
-static struct resource *wdt_irq;
-static struct clk *wdt_clock;
-static void __iomem *wdt_base;
-static unsigned int wdt_count;
-static close_state_t allow_close;
-
-/* watchdog control routines */
-
-#define DBG(msg...) do { \
- if (debug) \
- printk(KERN_INFO msg); \
- } while(0)
-
-/* functions */
-
-static int s3c2410wdt_keepalive(void)
-{
- writel(wdt_count, wdt_base + S3C2410_WTCNT);
- return 0;
-}
-
-static int s3c2410wdt_stop(void)
-{
- unsigned long wtcon;
-
- wtcon = readl(wdt_base + S3C2410_WTCON);
- wtcon &= ~(S3C2410_WTCON_ENABLE | S3C2410_WTCON_RSTEN);
- writel(wtcon, wdt_base + S3C2410_WTCON);
-
- return 0;
-}
-
-static int s3c2410wdt_start(void)
-{
- unsigned long wtcon;
-
- s3c2410wdt_stop();
-
- wtcon = readl(wdt_base + S3C2410_WTCON);
- wtcon |= S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128;
-
- if (soft_noboot) {
- wtcon |= S3C2410_WTCON_INTEN;
- wtcon &= ~S3C2410_WTCON_RSTEN;
- } else {
- wtcon &= ~S3C2410_WTCON_INTEN;
- wtcon |= S3C2410_WTCON_RSTEN;
- }
-
- DBG("%s: wdt_count=0x%08x, wtcon=%08lx\n",
- __FUNCTION__, wdt_count, wtcon);
-
- writel(wdt_count, wdt_base + S3C2410_WTDAT);
- writel(wdt_count, wdt_base + S3C2410_WTCNT);
- writel(wtcon, wdt_base + S3C2410_WTCON);
-
- return 0;
-}
-
-static int s3c2410wdt_set_heartbeat(int timeout)
-{
- unsigned int freq = clk_get_rate(wdt_clock);
- unsigned int count;
- unsigned int divisor = 1;
- unsigned long wtcon;
-
- if (timeout < 1)
- return -EINVAL;
-
- freq /= 128;
- count = timeout * freq;
-
- DBG("%s: count=%d, timeout=%d, freq=%d\n",
- __FUNCTION__, count, timeout, freq);
-
- /* if the count is bigger than the watchdog register,
- then work out what we need to do (and if) we can
- actually make this value
- */
-
- if (count >= 0x10000) {
- for (divisor = 1; divisor <= 0x100; divisor++) {
- if ((count / divisor) < 0x10000)
- break;
- }
-
- if ((count / divisor) >= 0x10000) {
- dev_err(wdt_dev, "timeout %d too big\n", timeout);
- return -EINVAL;
- }
- }
-
- tmr_margin = timeout;
-
- DBG("%s: timeout=%d, divisor=%d, count=%d (%08x)\n",
- __FUNCTION__, timeout, divisor, count, count/divisor);
-
- count /= divisor;
- wdt_count = count;
-
- /* update the pre-scaler */
- wtcon = readl(wdt_base + S3C2410_WTCON);
- wtcon &= ~S3C2410_WTCON_PRESCALE_MASK;
- wtcon |= S3C2410_WTCON_PRESCALE(divisor-1);
-
- writel(count, wdt_base + S3C2410_WTDAT);
- writel(wtcon, wdt_base + S3C2410_WTCON);
-
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int s3c2410wdt_open(struct inode *inode, struct file *file)
-{
- if(down_trylock(&open_lock))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- allow_close = CLOSE_STATE_NOT;
-
- /* start the timer */
- s3c2410wdt_start();
- return nonseekable_open(inode, file);
-}
-
-static int s3c2410wdt_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
-
- if (allow_close == CLOSE_STATE_ALLOW) {
- s3c2410wdt_stop();
- } else {
- dev_err(wdt_dev, "Unexpected close, not stopping watchdog\n");
- s3c2410wdt_keepalive();
- }
-
- allow_close = CLOSE_STATE_NOT;
- up(&open_lock);
- return 0;
-}
-
-static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /*
- * Refresh the timer.
- */
- if(len) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- allow_close = CLOSE_STATE_NOT;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- allow_close = CLOSE_STATE_ALLOW;
- }
- }
-
- s3c2410wdt_keepalive();
- }
- return len;
-}
-
-#define OPTIONS WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE
-
-static struct watchdog_info s3c2410_wdt_ident = {
- .options = OPTIONS,
- .firmware_version = 0,
- .identity = "S3C2410 Watchdog",
-};
-
-
-static int s3c2410wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_margin;
-
- switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &s3c2410_wdt_ident,
- sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- s3c2410wdt_keepalive();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
-
- if (s3c2410wdt_set_heartbeat(new_margin))
- return -EINVAL;
-
- s3c2410wdt_keepalive();
- return put_user(tmr_margin, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(tmr_margin, p);
- }
-}
-
-/* kernel interface */
-
-static const struct file_operations s3c2410wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = s3c2410wdt_write,
- .ioctl = s3c2410wdt_ioctl,
- .open = s3c2410wdt_open,
- .release = s3c2410wdt_release,
-};
-
-static struct miscdevice s3c2410wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &s3c2410wdt_fops,
-};
-
-/* interrupt handler code */
-
-static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
-{
- dev_info(wdt_dev, "watchdog timer expired (irq)\n");
-
- s3c2410wdt_keepalive();
- return IRQ_HANDLED;
-}
-/* device interface */
-
-static int s3c2410wdt_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct device *dev;
- unsigned int wtcon;
- int started = 0;
- int ret;
- int size;
-
- DBG("%s: probe=%p\n", __FUNCTION__, pdev);
-
- dev = &pdev->dev;
- wdt_dev = &pdev->dev;
-
- /* get the memory region for the watchdog timer */
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res == NULL) {
- dev_err(dev, "no memory resource specified\n");
- return -ENOENT;
- }
-
- size = (res->end-res->start)+1;
- wdt_mem = request_mem_region(res->start, size, pdev->name);
- if (wdt_mem == NULL) {
- dev_err(dev, "failed to get memory region\n");
- ret = -ENOENT;
- goto err_req;
- }
-
- wdt_base = ioremap(res->start, size);
- if (wdt_base == 0) {
- dev_err(dev, "failed to ioremap() region\n");
- ret = -EINVAL;
- goto err_req;
- }
-
- DBG("probe: mapped wdt_base=%p\n", wdt_base);
-
- wdt_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (wdt_irq == NULL) {
- dev_err(dev, "no irq resource specified\n");
- ret = -ENOENT;
- goto err_map;
- }
-
- ret = request_irq(wdt_irq->start, s3c2410wdt_irq, 0, pdev->name, pdev);
- if (ret != 0) {
- dev_err(dev, "failed to install irq (%d)\n", ret);
- goto err_map;
- }
-
- wdt_clock = clk_get(&pdev->dev, "watchdog");
- if (IS_ERR(wdt_clock)) {
- dev_err(dev, "failed to find watchdog clock source\n");
- ret = PTR_ERR(wdt_clock);
- goto err_irq;
- }
-
- clk_enable(wdt_clock);
-
- /* see if we can actually set the requested timer margin, and if
- * not, try the default value */
-
- if (s3c2410wdt_set_heartbeat(tmr_margin)) {
- started = s3c2410wdt_set_heartbeat(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
-
- if (started == 0) {
- dev_info(dev,"tmr_margin value out of range, default %d used\n",
- CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
- } else {
- dev_info(dev, "default timer value is out of range, cannot start\n");
- }
- }
-
- ret = misc_register(&s3c2410wdt_miscdev);
- if (ret) {
- dev_err(dev, "cannot register miscdev on minor=%d (%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_clk;
- }
-
- if (tmr_atboot && started == 0) {
- dev_info(dev, "starting watchdog timer\n");
- s3c2410wdt_start();
- } else if (!tmr_atboot) {
- /* if we're not enabling the watchdog, then ensure it is
- * disabled if it has been left running from the bootloader
- * or other source */
-
- s3c2410wdt_stop();
- }
-
- /* print out a statement of readiness */
-
- wtcon = readl(wdt_base + S3C2410_WTCON);
-
- dev_info(dev, "watchdog %sactive, reset %sabled, irq %sabled\n",
- (wtcon & S3C2410_WTCON_ENABLE) ? "" : "in",
- (wtcon & S3C2410_WTCON_RSTEN) ? "" : "dis",
- (wtcon & S3C2410_WTCON_INTEN) ? "" : "en");
-
- return 0;
-
- err_clk:
- clk_disable(wdt_clock);
- clk_put(wdt_clock);
-
- err_irq:
- free_irq(wdt_irq->start, pdev);
-
- err_map:
- iounmap(wdt_base);
-
- err_req:
- release_resource(wdt_mem);
- kfree(wdt_mem);
-
- return ret;
-}
-
-static int s3c2410wdt_remove(struct platform_device *dev)
-{
- release_resource(wdt_mem);
- kfree(wdt_mem);
- wdt_mem = NULL;
-
- free_irq(wdt_irq->start, dev);
- wdt_irq = NULL;
-
- clk_disable(wdt_clock);
- clk_put(wdt_clock);
- wdt_clock = NULL;
-
- iounmap(wdt_base);
- misc_deregister(&s3c2410wdt_miscdev);
- return 0;
-}
-
-static void s3c2410wdt_shutdown(struct platform_device *dev)
-{
- s3c2410wdt_stop();
-}
-
-#ifdef CONFIG_PM
-
-static unsigned long wtcon_save;
-static unsigned long wtdat_save;
-
-static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
-{
- /* Save watchdog state, and turn it off. */
- wtcon_save = readl(wdt_base + S3C2410_WTCON);
- wtdat_save = readl(wdt_base + S3C2410_WTDAT);
-
- /* Note that WTCNT doesn't need to be saved. */
- s3c2410wdt_stop();
-
- return 0;
-}
-
-static int s3c2410wdt_resume(struct platform_device *dev)
-{
- /* Restore watchdog state. */
-
- writel(wtdat_save, wdt_base + S3C2410_WTDAT);
- writel(wtdat_save, wdt_base + S3C2410_WTCNT); /* Reset count */
- writel(wtcon_save, wdt_base + S3C2410_WTCON);
-
- printk(KERN_INFO PFX "watchdog %sabled\n",
- (wtcon_save & S3C2410_WTCON_ENABLE) ? "en" : "dis");
-
- return 0;
-}
-
-#else
-#define s3c2410wdt_suspend NULL
-#define s3c2410wdt_resume NULL
-#endif /* CONFIG_PM */
-
-
-static struct platform_driver s3c2410wdt_driver = {
- .probe = s3c2410wdt_probe,
- .remove = s3c2410wdt_remove,
- .shutdown = s3c2410wdt_shutdown,
- .suspend = s3c2410wdt_suspend,
- .resume = s3c2410wdt_resume,
- .driver = {
- .owner = THIS_MODULE,
- .name = "s3c2410-wdt",
- },
-};
-
-
-static char banner[] __initdata = KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
-
-static int __init watchdog_init(void)
-{
- printk(banner);
- return platform_driver_register(&s3c2410wdt_driver);
-}
-
-static void __exit watchdog_exit(void)
-{
- platform_driver_unregister(&s3c2410wdt_driver);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
-
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, "
- "Dimitry Andric <dimitry.andric@tomtom.com>");
-MODULE_DESCRIPTION("S3C2410 Watchdog Device Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Watchdog driver for the SA11x0/PXA2xx
- *
- * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
- * Based on SoftDog driver by Alan Cox <alan@redhat.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Oleg Drokin nor iXcelerator.com admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
- *
- * 27/11/2000 Initial release
- */
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/init.h>
-
-#ifdef CONFIG_ARCH_PXA
-#include <asm/arch/pxa-regs.h>
-#endif
-
-#include <asm/hardware.h>
-#include <asm/bitops.h>
-#include <asm/uaccess.h>
-
-#define OSCR_FREQ CLOCK_TICK_RATE
-
-static unsigned long sa1100wdt_users;
-static int pre_margin;
-static int boot_status;
-
-/*
- * Allow only one person to hold it open
- */
-static int sa1100dog_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(1,&sa1100wdt_users))
- return -EBUSY;
-
- /* Activate SA1100 Watchdog timer */
- OSMR3 = OSCR + pre_margin;
- OSSR = OSSR_M3;
- OWER = OWER_WME;
- OIER |= OIER_E3;
- return nonseekable_open(inode, file);
-}
-
-/*
- * The watchdog cannot be disabled.
- *
- * Previous comments suggested that turning off the interrupt by
- * clearing OIER[E3] would prevent the watchdog timing out but this
- * does not appear to be true (at least on the PXA255).
- */
-static int sa1100dog_release(struct inode *inode, struct file *file)
-{
- printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
-
- clear_bit(1, &sa1100wdt_users);
-
- return 0;
-}
-
-static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
-{
- if (len)
- /* Refresh OSMR3 timer. */
- OSMR3 = OSCR + pre_margin;
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .identity = "SA1100/PXA255 Watchdog",
-};
-
-static int sa1100dog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int ret = -ENOTTY;
- int time;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user(argp, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- ret = put_user(0, p);
- break;
-
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, p);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, p);
- if (ret)
- break;
-
- if (time <= 0 || time > 255) {
- ret = -EINVAL;
- break;
- }
-
- pre_margin = OSCR_FREQ * time;
- OSMR3 = OSCR + pre_margin;
- /*fall through*/
-
- case WDIOC_GETTIMEOUT:
- ret = put_user(pre_margin / OSCR_FREQ, p);
- break;
-
- case WDIOC_KEEPALIVE:
- OSMR3 = OSCR + pre_margin;
- ret = 0;
- break;
- }
- return ret;
-}
-
-static const struct file_operations sa1100dog_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sa1100dog_write,
- .ioctl = sa1100dog_ioctl,
- .open = sa1100dog_open,
- .release = sa1100dog_release,
-};
-
-static struct miscdevice sa1100dog_miscdev =
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sa1100dog_fops,
-};
-
-static int margin __initdata = 60; /* (secs) Default is 1 minute */
-
-static int __init sa1100dog_init(void)
-{
- int ret;
-
- /*
- * Read the reset status, and save it for later. If
- * we suspend, RCSR will be cleared, and the watchdog
- * reset reason will be lost.
- */
- boot_status = (RCSR & RCSR_WDR) ? WDIOF_CARDRESET : 0;
- pre_margin = OSCR_FREQ * margin;
-
- ret = misc_register(&sa1100dog_miscdev);
- if (ret == 0)
- printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
- margin);
- return ret;
-}
-
-static void __exit sa1100dog_exit(void)
-{
- misc_deregister(&sa1100dog_miscdev);
-}
-
-module_init(sa1100dog_init);
-module_exit(sa1100dog_exit);
-
-MODULE_AUTHOR("Oleg Drokin <green@crimea.edu>");
-MODULE_DESCRIPTION("SA1100/PXA2xx Watchdog");
-
-module_param(margin, int, 0);
-MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");
-
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * 60xx Single Board Computer Watchdog Timer driver for Linux 2.2.x
- *
- * Based on acquirewdt.c by Alan Cox.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The author does NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
- *
- * (c) Copyright 2000 Jakob Oestergaard <jakob@unthought.net>
- *
- * 12/4 - 2000 [Initial revision]
- * 25/4 - 2000 Added /dev/watchdog support
- * 09/5 - 2001 [smj@oro.net] fixed fop_write to "return 1" on success
- * 12/4 - 2002 [rob@osinvestor.com] eliminate fop_read
- * fix possible wdt_is_open race
- * add CONFIG_WATCHDOG_NOWAYOUT support
- * remove lock_kernel/unlock_kernel pairs
- * added KERN_* to printk's
- * got rid of extraneous comments
- * changed watchdog_info to correctly reflect what the driver offers
- * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
- * WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
- * 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
- * use module_param
- * made timeout (the emulated heartbeat) a module_param
- * made the keepalive ping an internal subroutine
- * made wdt_stop and wdt_start module params
- * added extra printk's for startup problems
- * added MODULE_AUTHOR and MODULE_DESCRIPTION info
- *
- *
- * This WDT driver is different from the other Linux WDT
- * drivers in the following ways:
- * *) The driver will ping the watchdog by itself, because this
- * particular WDT has a very short timeout (one second) and it
- * would be insane to count on any userspace daemon always
- * getting scheduled within that time frame.
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/jiffies.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define OUR_NAME "sbc60xxwdt"
-#define PFX OUR_NAME ": "
-
-/*
- * You must set these - The driver cannot probe for the settings
- */
-
-static int wdt_stop = 0x45;
-module_param(wdt_stop, int, 0);
-MODULE_PARM_DESC(wdt_stop, "SBC60xx WDT 'stop' io port (default 0x45)");
-
-static int wdt_start = 0x443;
-module_param(wdt_start, int, 0);
-MODULE_PARM_DESC(wdt_start, "SBC60xx WDT 'start' io port (default 0x443)");
-
-/*
- * The 60xx board can use watchdog timeout values from one second
- * to several minutes. The default is one second, so if we reset
- * the watchdog every ~250ms we should be safe.
- */
-
-#define WDT_INTERVAL (HZ/4+1)
-
-/*
- * We must not require too good response from the userspace daemon.
- * Here we require the userspace daemon to send us a heartbeat
- * char to /dev/watchdog every 30 seconds.
- * If the daemon pulses us every 25 seconds, we can still afford
- * a 5 second scheduling delay on the (high priority) daemon. That
- * should be sufficient for a box under any load.
- */
-
-#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void wdt_timer_ping(unsigned long);
-static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
-static unsigned long next_heartbeat;
-static unsigned long wdt_is_open;
-static char wdt_expect_close;
-
-/*
- * Whack the dog
- */
-
-static void wdt_timer_ping(unsigned long data)
-{
- /* If we got a heartbeat pulse within the WDT_US_INTERVAL
- * we agree to ping the WDT
- */
- if(time_before(jiffies, next_heartbeat))
- {
- /* Ping the WDT by reading from wdt_start */
- inb_p(wdt_start);
- /* Re-set the timer interval */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
-}
-
-/*
- * Utility routines
- */
-
-static void wdt_startup(void)
-{
- next_heartbeat = jiffies + (timeout * HZ);
-
- /* Start the timer */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
- printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
-}
-
-static void wdt_turnoff(void)
-{
- /* Stop the timer */
- del_timer(&timer);
- inb_p(wdt_stop);
- printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
-}
-
-static void wdt_keepalive(void)
-{
- /* user land ping */
- next_heartbeat = jiffies + (timeout * HZ);
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
- size_t ofs;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- wdt_expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
- char c;
- if(get_user(c, buf+ofs))
- return -EFAULT;
- if(c == 'V')
- wdt_expect_close = 42;
- }
- }
-
- /* Well, anyhow someone wrote to us, we should return that favour */
- wdt_keepalive();
- }
- return count;
-}
-
-static int fop_open(struct inode * inode, struct file * file)
-{
- /* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Good, fire up the show */
- wdt_startup();
- return nonseekable_open(inode, file);
-}
-
-static int fop_close(struct inode * inode, struct file * file)
-{
- if(wdt_expect_close == 42)
- wdt_turnoff();
- else {
- del_timer(&timer);
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
- }
- clear_bit(0, &wdt_is_open);
- wdt_expect_close = 0;
- return 0;
-}
-
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident=
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "SBC60xx",
- };
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
-
- return retval;
- }
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
- }
-}
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = fop_write,
- .open = fop_open,
- .release = fop_close,
- .ioctl = fop_ioctl,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-/*
- * Notifier for system down
- */
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT)
- wdt_turnoff();
- return NOTIFY_DONE;
-}
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier=
-{
- .notifier_call = wdt_notify_sys,
-};
-
-static void __exit sbc60xxwdt_unload(void)
-{
- wdt_turnoff();
-
- /* Deregister */
- misc_deregister(&wdt_miscdev);
-
- unregister_reboot_notifier(&wdt_notifier);
- if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- release_region(wdt_stop,1);
- release_region(wdt_start,1);
-}
-
-static int __init sbc60xxwdt_init(void)
-{
- int rc = -EBUSY;
-
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
- timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
- }
-
- if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
- rc = -EIO;
- goto err_out;
- }
-
- /* We cannot reserve 0x45 - the kernel already has! */
- if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- {
- if (!request_region(wdt_stop, 1, "SBC 60XX WDT"))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
- rc = -EIO;
- goto err_out_region1;
- }
- }
-
- rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
- goto err_out_region2;
- }
-
- rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
- }
-
- printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
- return 0;
-
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
-err_out_region2:
- if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- release_region(wdt_stop,1);
-err_out_region1:
- release_region(wdt_start,1);
-err_out:
- return rc;
-}
-
-module_init(sbc60xxwdt_init);
-module_exit(sbc60xxwdt_unload);
-
-MODULE_AUTHOR("Jakob Oestergaard <jakob@unthought.net>");
-MODULE_DESCRIPTION("60xx Single Board Computer Watchdog Timer driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * SBC8360 Watchdog driver
- *
- * (c) Copyright 2005 Webcon, Inc.
- *
- * Based on ib700wdt.c, which is based on advantechwdt.c which is based
- * on acquirewdt.c which is based on wdt.c.
- *
- * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
- *
- * Based on advantechwdt.c which is based on acquirewdt.c which
- * is based on wdt.c.
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * Based on acquirewdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@redhat.com>
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- * Added timeout module option to override default
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/notifier.h>
-#include <linux/fs.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/moduleparam.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-static unsigned long sbc8360_is_open;
-static spinlock_t sbc8360_lock;
-static char expect_close;
-
-#define PFX "sbc8360: "
-
-/*
- *
- * Watchdog Timer Configuration
- *
- * The function of the watchdog timer is to reset the system automatically
- * and is defined at I/O port 0120H and 0121H. To enable the watchdog timer
- * and allow the system to reset, write appropriate values from the table
- * below to I/O port 0120H and 0121H. To disable the timer, write a zero
- * value to I/O port 0121H for the system to stop the watchdog function.
- *
- * The following describes how the timer should be programmed (according to
- * the vendor documentation)
- *
- * Enabling Watchdog:
- * MOV AX,000AH (enable, phase I)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000BH (enable, phase II)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000nH (set multiplier n, from 1-4)
- * MOV DX,0120H
- * OUT DX,AX
- * MOV AX,000mH (set base timer m, from 0-F)
- * MOV DX,0121H
- * OUT DX,AX
- *
- * Reset timer:
- * MOV AX,000mH (same as set base timer, above)
- * MOV DX,0121H
- * OUT DX,AX
- *
- * Disabling Watchdog:
- * MOV AX,0000H (a zero value)
- * MOV DX,0120H
- * OUT DX,AX
- *
- * Watchdog timeout configuration values:
- * N
- * M | 1 2 3 4
- * --|----------------------------------
- * 0 | 0.5s 5s 50s 100s
- * 1 | 1s 10s 100s 200s
- * 2 | 1.5s 15s 150s 300s
- * 3 | 2s 20s 200s 400s
- * 4 | 2.5s 25s 250s 500s
- * 5 | 3s 30s 300s 600s
- * 6 | 3.5s 35s 350s 700s
- * 7 | 4s 40s 400s 800s
- * 8 | 4.5s 45s 450s 900s
- * 9 | 5s 50s 500s 1000s
- * A | 5.5s 55s 550s 1100s
- * B | 6s 60s 600s 1200s
- * C | 6.5s 65s 650s 1300s
- * D | 7s 70s 700s 1400s
- * E | 7.5s 75s 750s 1500s
- * F | 8s 80s 800s 1600s
- *
- * Another way to say the same things is:
- * For N=1, Timeout = (M+1) * 0.5s
- * For N=2, Timeout = (M+1) * 5s
- * For N=3, Timeout = (M+1) * 50s
- * For N=4, Timeout = (M+1) * 100s
- *
- */
-
-static int wd_times[64][2] = {
- {0, 1}, /* 0 = 0.5s */
- {1, 1}, /* 1 = 1s */
- {2, 1}, /* 2 = 1.5s */
- {3, 1}, /* 3 = 2s */
- {4, 1}, /* 4 = 2.5s */
- {5, 1}, /* 5 = 3s */
- {6, 1}, /* 6 = 3.5s */
- {7, 1}, /* 7 = 4s */
- {8, 1}, /* 8 = 4.5s */
- {9, 1}, /* 9 = 5s */
- {0xA, 1}, /* 10 = 5.5s */
- {0xB, 1}, /* 11 = 6s */
- {0xC, 1}, /* 12 = 6.5s */
- {0xD, 1}, /* 13 = 7s */
- {0xE, 1}, /* 14 = 7.5s */
- {0xF, 1}, /* 15 = 8s */
- {0, 2}, /* 16 = 5s */
- {1, 2}, /* 17 = 10s */
- {2, 2}, /* 18 = 15s */
- {3, 2}, /* 19 = 20s */
- {4, 2}, /* 20 = 25s */
- {5, 2}, /* 21 = 30s */
- {6, 2}, /* 22 = 35s */
- {7, 2}, /* 23 = 40s */
- {8, 2}, /* 24 = 45s */
- {9, 2}, /* 25 = 50s */
- {0xA, 2}, /* 26 = 55s */
- {0xB, 2}, /* 27 = 60s */
- {0xC, 2}, /* 28 = 65s */
- {0xD, 2}, /* 29 = 70s */
- {0xE, 2}, /* 30 = 75s */
- {0xF, 2}, /* 31 = 80s */
- {0, 3}, /* 32 = 50s */
- {1, 3}, /* 33 = 100s */
- {2, 3}, /* 34 = 150s */
- {3, 3}, /* 35 = 200s */
- {4, 3}, /* 36 = 250s */
- {5, 3}, /* 37 = 300s */
- {6, 3}, /* 38 = 350s */
- {7, 3}, /* 39 = 400s */
- {8, 3}, /* 40 = 450s */
- {9, 3}, /* 41 = 500s */
- {0xA, 3}, /* 42 = 550s */
- {0xB, 3}, /* 43 = 600s */
- {0xC, 3}, /* 44 = 650s */
- {0xD, 3}, /* 45 = 700s */
- {0xE, 3}, /* 46 = 750s */
- {0xF, 3}, /* 47 = 800s */
- {0, 4}, /* 48 = 100s */
- {1, 4}, /* 49 = 200s */
- {2, 4}, /* 50 = 300s */
- {3, 4}, /* 51 = 400s */
- {4, 4}, /* 52 = 500s */
- {5, 4}, /* 53 = 600s */
- {6, 4}, /* 54 = 700s */
- {7, 4}, /* 55 = 800s */
- {8, 4}, /* 56 = 900s */
- {9, 4}, /* 57 = 1000s */
- {0xA, 4}, /* 58 = 1100s */
- {0xB, 4}, /* 59 = 1200s */
- {0xC, 4}, /* 60 = 1300s */
- {0xD, 4}, /* 61 = 1400s */
- {0xE, 4}, /* 62 = 1500s */
- {0xF, 4} /* 63 = 1600s */
-};
-
-#define SBC8360_ENABLE 0x120
-#define SBC8360_BASETIME 0x121
-
-static int timeout = 27;
-static int wd_margin = 0xB;
-static int wd_multiplier = 2;
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout,
- "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Kernel methods.
- */
-
-/* Activate and pre-configure watchdog */
-static void sbc8360_activate(void)
-{
- /* Enable the watchdog */
- outb(0x0A, SBC8360_ENABLE);
- msleep_interruptible(100);
- outb(0x0B, SBC8360_ENABLE);
- msleep_interruptible(100);
- /* Set timeout multiplier */
- outb(wd_multiplier, SBC8360_ENABLE);
- msleep_interruptible(100);
- /* Nothing happens until first sbc8360_ping() */
-}
-
-/* Kernel pings watchdog */
-static void sbc8360_ping(void)
-{
- /* Write the base timer register */
- outb(wd_margin, SBC8360_BASETIME);
-}
-
-/* Userspace pings kernel driver, or requests clean close */
-static ssize_t sbc8360_write(struct file *file, const char __user * buf,
- size_t count, loff_t * ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- sbc8360_ping();
- }
- return count;
-}
-
-static int sbc8360_open(struct inode *inode, struct file *file)
-{
- spin_lock(&sbc8360_lock);
- if (test_and_set_bit(0, &sbc8360_is_open)) {
- spin_unlock(&sbc8360_lock);
- return -EBUSY;
- }
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate and ping once to start the countdown */
- spin_unlock(&sbc8360_lock);
- sbc8360_activate();
- sbc8360_ping();
- return nonseekable_open(inode, file);
-}
-
-static int sbc8360_close(struct inode *inode, struct file *file)
-{
- spin_lock(&sbc8360_lock);
- if (expect_close == 42)
- outb(0, SBC8360_ENABLE);
- else
- printk(KERN_CRIT PFX
- "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
-
- clear_bit(0, &sbc8360_is_open);
- expect_close = 0;
- spin_unlock(&sbc8360_lock);
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int sbc8360_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Disable the SBC8360 Watchdog */
- outb(0, SBC8360_ENABLE);
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations sbc8360_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sbc8360_write,
- .open = sbc8360_open,
- .release = sbc8360_close,
-};
-
-static struct miscdevice sbc8360_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sbc8360_fops,
-};
-
-/*
- * The SBC8360 needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block sbc8360_notifier = {
- .notifier_call = sbc8360_notify_sys,
-};
-
-static int __init sbc8360_init(void)
-{
- int res;
- unsigned long int mseconds = 60000;
-
- if (timeout < 0 || timeout > 63) {
- printk(KERN_ERR PFX "Invalid timeout index (must be 0-63).\n");
- res = -EINVAL;
- goto out;
- }
-
- if (!request_region(SBC8360_ENABLE, 1, "SBC8360")) {
- printk(KERN_ERR PFX "ENABLE method I/O %X is not available.\n",
- SBC8360_ENABLE);
- res = -EIO;
- goto out;
- }
- if (!request_region(SBC8360_BASETIME, 1, "SBC8360")) {
- printk(KERN_ERR PFX
- "BASETIME method I/O %X is not available.\n",
- SBC8360_BASETIME);
- res = -EIO;
- goto out_nobasetimereg;
- }
-
- res = register_reboot_notifier(&sbc8360_notifier);
- if (res) {
- printk(KERN_ERR PFX "Failed to register reboot notifier.\n");
- goto out_noreboot;
- }
-
- spin_lock_init(&sbc8360_lock);
- res = misc_register(&sbc8360_miscdev);
- if (res) {
- printk(KERN_ERR PFX "failed to register misc device\n");
- goto out_nomisc;
- }
-
- wd_margin = wd_times[timeout][0];
- wd_multiplier = wd_times[timeout][1];
-
- if (wd_multiplier == 1)
- mseconds = (wd_margin + 1) * 500;
- else if (wd_multiplier == 2)
- mseconds = (wd_margin + 1) * 5000;
- else if (wd_multiplier == 3)
- mseconds = (wd_margin + 1) * 50000;
- else if (wd_multiplier == 4)
- mseconds = (wd_margin + 1) * 100000;
-
- /* My kingdom for the ability to print "0.5 seconds" in the kernel! */
- printk(KERN_INFO PFX "Timeout set at %ld ms.\n", mseconds);
-
- return 0;
-
- out_nomisc:
- unregister_reboot_notifier(&sbc8360_notifier);
- out_noreboot:
- release_region(SBC8360_BASETIME, 1);
- out_nobasetimereg:
- release_region(SBC8360_ENABLE, 1);
- out:
- return res;
-}
-
-static void __exit sbc8360_exit(void)
-{
- misc_deregister(&sbc8360_miscdev);
- unregister_reboot_notifier(&sbc8360_notifier);
- release_region(SBC8360_ENABLE, 1);
- release_region(SBC8360_BASETIME, 1);
-}
-
-module_init(sbc8360_init);
-module_exit(sbc8360_exit);
-
-MODULE_AUTHOR("Ian E. Morgan <imorgan@webcon.ca>");
-MODULE_DESCRIPTION("SBC8360 watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.01");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-/* end of sbc8360.c */
+++ /dev/null
-/*
- * SBC EPX C3 0.1 A Hardware Watchdog Device for the Winsystems EPX-C3
- * single board computer
- *
- * (c) Copyright 2006 Calin A. Culianu <calin@ajvar.org>, All Rights
- * Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * based on softdog.c by Alan Cox <alan@redhat.com>
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define PFX "epx_c3: "
-static int epx_c3_alive;
-
-#define WATCHDOG_TIMEOUT 1 /* 1 sec default timeout */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-#define EPXC3_WATCHDOG_CTL_REG 0x1ee /* write 1 to enable, 0 to disable */
-#define EPXC3_WATCHDOG_PET_REG 0x1ef /* write anything to pet once enabled */
-
-static void epx_c3_start(void)
-{
- outb(1, EPXC3_WATCHDOG_CTL_REG);
-}
-
-static void epx_c3_stop(void)
-{
-
- outb(0, EPXC3_WATCHDOG_CTL_REG);
-
- printk(KERN_INFO PFX "Stopped watchdog timer.\n");
-}
-
-static void epx_c3_pet(void)
-{
- outb(1, EPXC3_WATCHDOG_PET_REG);
-}
-
-/*
- * Allow only one person to hold it open
- */
-static int epx_c3_open(struct inode *inode, struct file *file)
-{
- if (epx_c3_alive)
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Activate timer */
- epx_c3_start();
- epx_c3_pet();
-
- epx_c3_alive = 1;
- printk(KERN_INFO "Started watchdog timer.\n");
-
- return nonseekable_open(inode, file);
-}
-
-static int epx_c3_release(struct inode *inode, struct file *file)
-{
- /* Shut off the timer.
- * Lock it in if it's a module and we defined ...NOWAYOUT */
- if (!nowayout)
- epx_c3_stop(); /* Turn the WDT off */
-
- epx_c3_alive = 0;
-
- return 0;
-}
-
-static ssize_t epx_c3_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* Refresh the timer. */
- if (len)
- epx_c3_pet();
- return len;
-}
-
-static int epx_c3_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int options, retval = -EINVAL;
- int __user *argp = (void __user *)arg;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "Winsystems EPX-C3 H/W Watchdog",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- return 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, argp);
- case WDIOC_KEEPALIVE:
- epx_c3_pet();
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(WATCHDOG_TIMEOUT, argp);
- case WDIOC_SETOPTIONS:
- if (get_user(options, argp))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- epx_c3_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- epx_c3_start();
- retval = 0;
- }
-
- return retval;
- default:
- return -ENOTTY;
- }
-}
-
-static int epx_c3_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- epx_c3_stop(); /* Turn the WDT off */
-
- return NOTIFY_DONE;
-}
-
-static const struct file_operations epx_c3_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = epx_c3_write,
- .ioctl = epx_c3_ioctl,
- .open = epx_c3_open,
- .release = epx_c3_release,
-};
-
-static struct miscdevice epx_c3_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &epx_c3_fops,
-};
-
-static struct notifier_block epx_c3_notifier = {
- .notifier_call = epx_c3_notify_sys,
-};
-
-static const char banner[] __initdata =
- KERN_INFO PFX "Hardware Watchdog Timer for Winsystems EPX-C3 SBC: 0.1\n";
-
-static int __init watchdog_init(void)
-{
- int ret;
-
- if (!request_region(EPXC3_WATCHDOG_CTL_REG, 2, "epxc3_watchdog"))
- return -EBUSY;
-
- ret = register_reboot_notifier(&epx_c3_notifier);
- if (ret) {
- printk(KERN_ERR PFX "cannot register reboot notifier "
- "(err=%d)\n", ret);
- goto out;
- }
-
- ret = misc_register(&epx_c3_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d "
- "(err=%d)\n", WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&epx_c3_notifier);
- goto out;
- }
-
- printk(banner);
-
- return 0;
-
-out:
- release_region(EPXC3_WATCHDOG_CTL_REG, 2);
- return ret;
-}
-
-static void __exit watchdog_exit(void)
-{
- misc_deregister(&epx_c3_miscdev);
- unregister_reboot_notifier(&epx_c3_notifier);
- release_region(EPXC3_WATCHDOG_CTL_REG, 2);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
-
-MODULE_AUTHOR("Calin A. Culianu <calin@ajvar.org>");
-MODULE_DESCRIPTION("Hardware Watchdog Device for Winsystems EPX-C3 SBC. Note that there is no way to probe for this device -- so only use it if you are *sure* you are runnning on this specific SBC system from Winsystems! It writes to IO ports 0x1ee and 0x1ef!");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * National Semiconductor PC87307/PC97307 (ala SC1200) WDT driver
- * (c) Copyright 2002 Zwane Mwaikambo <zwane@commfireservices.com>,
- * All Rights Reserved.
- * Based on wdt.c and wdt977.c by Alan Cox and Woody Suwalski respectively.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The author(s) of this software shall not be held liable for damages
- * of any nature resulting due to the use of this software. This
- * software is provided AS-IS with no warranties.
- *
- * Changelog:
- * 20020220 Zwane Mwaikambo Code based on datasheet, no hardware.
- * 20020221 Zwane Mwaikambo Cleanups as suggested by Jeff Garzik and Alan Cox.
- * 20020222 Zwane Mwaikambo Added probing.
- * 20020225 Zwane Mwaikambo Added ISAPNP support.
- * 20020412 Rob Radez Broke out start/stop functions
- * <rob@osinvestor.com> Return proper status instead of temperature warning
- * Add WDIOC_GETBOOTSTATUS and WDIOC_SETOPTIONS ioctls
- * Fix CONFIG_WATCHDOG_NOWAYOUT
- * 20020530 Joel Becker Add Matt Domsch's nowayout module option
- * 20030116 Adam Belay Updated to the latest pnp code
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/spinlock.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/pnp.h>
-#include <linux/fs.h>
-
-#include <asm/semaphore.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#define SC1200_MODULE_VER "build 20020303"
-#define SC1200_MODULE_NAME "sc1200wdt"
-#define PFX SC1200_MODULE_NAME ": "
-
-#define MAX_TIMEOUT 255 /* 255 minutes */
-#define PMIR (io) /* Power Management Index Register */
-#define PMDR (io+1) /* Power Management Data Register */
-
-/* Data Register indexes */
-#define FER1 0x00 /* Function enable register 1 */
-#define FER2 0x01 /* Function enable register 2 */
-#define PMC1 0x02 /* Power Management Ctrl 1 */
-#define PMC2 0x03 /* Power Management Ctrl 2 */
-#define PMC3 0x04 /* Power Management Ctrl 3 */
-#define WDTO 0x05 /* Watchdog timeout register */
-#define WDCF 0x06 /* Watchdog config register */
-#define WDST 0x07 /* Watchdog status register */
-
-/* WDCF bitfields - which devices assert WDO */
-#define KBC_IRQ 0x01 /* Keyboard Controller */
-#define MSE_IRQ 0x02 /* Mouse */
-#define UART1_IRQ 0x03 /* Serial0 */
-#define UART2_IRQ 0x04 /* Serial1 */
-/* 5 -7 are reserved */
-
-static char banner[] __initdata = KERN_INFO PFX SC1200_MODULE_VER;
-static int timeout = 1;
-static int io = -1;
-static int io_len = 2; /* for non plug and play */
-static struct semaphore open_sem;
-static char expect_close;
-static spinlock_t sc1200wdt_lock; /* io port access serialisation */
-
-#if defined CONFIG_PNP
-static int isapnp = 1;
-static struct pnp_dev *wdt_dev;
-
-module_param(isapnp, int, 0);
-MODULE_PARM_DESC(isapnp, "When set to 0 driver ISA PnP support will be disabled");
-#endif
-
-module_param(io, int, 0);
-MODULE_PARM_DESC(io, "io port");
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "range is 0-255 minutes, default is 1");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-
-
-/* Read from Data Register */
-static inline void sc1200wdt_read_data(unsigned char index, unsigned char *data)
-{
- spin_lock(&sc1200wdt_lock);
- outb_p(index, PMIR);
- *data = inb(PMDR);
- spin_unlock(&sc1200wdt_lock);
-}
-
-
-/* Write to Data Register */
-static inline void sc1200wdt_write_data(unsigned char index, unsigned char data)
-{
- spin_lock(&sc1200wdt_lock);
- outb_p(index, PMIR);
- outb(data, PMDR);
- spin_unlock(&sc1200wdt_lock);
-}
-
-
-static void sc1200wdt_start(void)
-{
- unsigned char reg;
-
- sc1200wdt_read_data(WDCF, ®);
- /* assert WDO when any of the following interrupts are triggered too */
- reg |= (KBC_IRQ | MSE_IRQ | UART1_IRQ | UART2_IRQ);
- sc1200wdt_write_data(WDCF, reg);
- /* set the timeout and get the ball rolling */
- sc1200wdt_write_data(WDTO, timeout);
-}
-
-
-static void sc1200wdt_stop(void)
-{
- sc1200wdt_write_data(WDTO, 0);
-}
-
-
-/* This returns the status of the WDO signal, inactive high. */
-static inline int sc1200wdt_status(void)
-{
- unsigned char ret;
-
- sc1200wdt_read_data(WDST, &ret);
- /* If the bit is inactive, the watchdog is enabled, so return
- * KEEPALIVEPING which is a bit of a kludge because there's nothing
- * else for enabled/disabled status
- */
- return (ret & 0x01) ? 0 : WDIOF_KEEPALIVEPING; /* bits 1 - 7 are undefined */
-}
-
-
-static int sc1200wdt_open(struct inode *inode, struct file *file)
-{
- /* allow one at a time */
- if (down_trylock(&open_sem))
- return -EBUSY;
-
- if (timeout > MAX_TIMEOUT)
- timeout = MAX_TIMEOUT;
-
- sc1200wdt_start();
- printk(KERN_INFO PFX "Watchdog enabled, timeout = %d min(s)", timeout);
-
- return nonseekable_open(inode, file);
-}
-
-
-static int sc1200wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- int new_timeout;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "PC87307/PC97307",
- };
-
- switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof ident))
- return -EFAULT;
- return 0;
-
- case WDIOC_GETSTATUS:
- return put_user(sc1200wdt_status(), p);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- sc1200wdt_write_data(WDTO, timeout);
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- /* the API states this is given in secs */
- new_timeout /= 60;
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- sc1200wdt_write_data(WDTO, timeout);
- /* fall through and return the new timeout */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout * 60, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- sc1200wdt_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- sc1200wdt_start();
- retval = 0;
- }
-
- return retval;
- }
- }
-}
-
-
-static int sc1200wdt_release(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- sc1200wdt_stop();
- printk(KERN_INFO PFX "Watchdog disabled\n");
- } else {
- sc1200wdt_write_data(WDTO, timeout);
- printk(KERN_CRIT PFX "Unexpected close!, timeout = %d min(s)\n", timeout);
- }
- up(&open_sem);
- expect_close = 0;
-
- return 0;
-}
-
-
-static ssize_t sc1200wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
-{
- if (len) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
-
- sc1200wdt_write_data(WDTO, timeout);
- return len;
- }
-
- return 0;
-}
-
-
-static int sc1200wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- sc1200wdt_stop();
-
- return NOTIFY_DONE;
-}
-
-
-static struct notifier_block sc1200wdt_notifier =
-{
- .notifier_call = sc1200wdt_notify_sys,
-};
-
-static const struct file_operations sc1200wdt_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sc1200wdt_write,
- .ioctl = sc1200wdt_ioctl,
- .open = sc1200wdt_open,
- .release = sc1200wdt_release,
-};
-
-static struct miscdevice sc1200wdt_miscdev =
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sc1200wdt_fops,
-};
-
-
-static int __init sc1200wdt_probe(void)
-{
- /* The probe works by reading the PMC3 register's default value of 0x0e
- * there is one caveat, if the device disables the parallel port or any
- * of the UARTs we won't be able to detect it.
- * Nb. This could be done with accuracy by reading the SID registers, but
- * we don't have access to those io regions.
- */
-
- unsigned char reg;
-
- sc1200wdt_read_data(PMC3, ®);
- reg &= 0x0f; /* we don't want the UART busy bits */
- return (reg == 0x0e) ? 0 : -ENODEV;
-}
-
-
-#if defined CONFIG_PNP
-
-static struct pnp_device_id scl200wdt_pnp_devices[] = {
- /* National Semiconductor PC87307/PC97307 watchdog component */
- {.id = "NSC0800", .driver_data = 0},
- {.id = ""},
-};
-
-static int scl200wdt_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
-{
- /* this driver only supports one card at a time */
- if (wdt_dev || !isapnp)
- return -EBUSY;
-
- wdt_dev = dev;
- io = pnp_port_start(wdt_dev, 0);
- io_len = pnp_port_len(wdt_dev, 0);
-
- if (!request_region(io, io_len, SC1200_MODULE_NAME)) {
- printk(KERN_ERR PFX "Unable to register IO port %#x\n", io);
- return -EBUSY;
- }
-
- printk(KERN_INFO "scl200wdt: PnP device found at io port %#x/%d\n", io, io_len);
- return 0;
-}
-
-static void scl200wdt_pnp_remove(struct pnp_dev * dev)
-{
- if (wdt_dev){
- release_region(io, io_len);
- wdt_dev = NULL;
- }
-}
-
-static struct pnp_driver scl200wdt_pnp_driver = {
- .name = "scl200wdt",
- .id_table = scl200wdt_pnp_devices,
- .probe = scl200wdt_pnp_probe,
- .remove = scl200wdt_pnp_remove,
-};
-
-#endif /* CONFIG_PNP */
-
-
-static int __init sc1200wdt_init(void)
-{
- int ret;
-
- printk("%s\n", banner);
-
- spin_lock_init(&sc1200wdt_lock);
- sema_init(&open_sem, 1);
-
-#if defined CONFIG_PNP
- if (isapnp) {
- ret = pnp_register_driver(&scl200wdt_pnp_driver);
- if (ret)
- goto out_clean;
- }
-#endif
-
- if (io == -1) {
- printk(KERN_ERR PFX "io parameter must be specified\n");
- ret = -EINVAL;
- goto out_pnp;
- }
-
-#if defined CONFIG_PNP
- /* now that the user has specified an IO port and we haven't detected
- * any devices, disable pnp support */
- isapnp = 0;
- pnp_unregister_driver(&scl200wdt_pnp_driver);
-#endif
-
- if (!request_region(io, io_len, SC1200_MODULE_NAME)) {
- printk(KERN_ERR PFX "Unable to register IO port %#x\n", io);
- ret = -EBUSY;
- goto out_pnp;
- }
-
- ret = sc1200wdt_probe();
- if (ret)
- goto out_io;
-
- ret = register_reboot_notifier(&sc1200wdt_notifier);
- if (ret) {
- printk(KERN_ERR PFX "Unable to register reboot notifier err = %d\n", ret);
- goto out_io;
- }
-
- ret = misc_register(&sc1200wdt_miscdev);
- if (ret) {
- printk(KERN_ERR PFX "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
- goto out_rbt;
- }
-
- /* ret = 0 */
-
-out_clean:
- return ret;
-
-out_rbt:
- unregister_reboot_notifier(&sc1200wdt_notifier);
-
-out_io:
- release_region(io, io_len);
-
-out_pnp:
-#if defined CONFIG_PNP
- if (isapnp)
- pnp_unregister_driver(&scl200wdt_pnp_driver);
-#endif
- goto out_clean;
-}
-
-
-static void __exit sc1200wdt_exit(void)
-{
- misc_deregister(&sc1200wdt_miscdev);
- unregister_reboot_notifier(&sc1200wdt_notifier);
-
-#if defined CONFIG_PNP
- if(isapnp)
- pnp_unregister_driver(&scl200wdt_pnp_driver);
- else
-#endif
- release_region(io, io_len);
-}
-
-module_init(sc1200wdt_init);
-module_exit(sc1200wdt_exit);
-
-MODULE_AUTHOR("Zwane Mwaikambo <zwane@commfireservices.com>");
-MODULE_DESCRIPTION("Driver for National Semiconductor PC87307/PC97307 watchdog component");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * AMD Elan SC520 processor Watchdog Timer driver
- *
- * Based on acquirewdt.c by Alan Cox,
- * and sbc60xxwdt.c by Jakob Oestergaard <jakob@unthought.net>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The authors do NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
- *
- * (c) Copyright 2001 Scott Jennings <linuxdrivers@oro.net>
- * 9/27 - 2001 [Initial release]
- *
- * Additional fixes Alan Cox
- * - Fixed formatting
- * - Removed debug printks
- * - Fixed SMP built kernel deadlock
- * - Switched to private locks not lock_kernel
- * - Used ioremap/writew/readw
- * - Added NOWAYOUT support
- * 4/12 - 2002 Changes by Rob Radez <rob@osinvestor.com>
- * - Change comments
- * - Eliminate fop_llseek
- * - Change CONFIG_WATCHDOG_NOWAYOUT semantics
- * - Add KERN_* tags to printks
- * - fix possible wdt_is_open race
- * - Report proper capabilities in watchdog_info
- * - Add WDIOC_{GETSTATUS, GETBOOTSTATUS, SETTIMEOUT,
- * GETTIMEOUT, SETOPTIONS} ioctls
- * 09/8 - 2003 Changes by Wim Van Sebroeck <wim@iguana.be>
- * - cleanup of trailing spaces
- * - added extra printk's for startup problems
- * - use module_param
- * - made timeout (the emulated heartbeat) a module_param
- * - made the keepalive ping an internal subroutine
- * 3/27 - 2004 Changes by Sean Young <sean@mess.org>
- * - set MMCR_BASE to 0xfffef000
- * - CBAR does not need to be read
- * - removed debugging printks
- *
- * This WDT driver is different from most other Linux WDT
- * drivers in that the driver will ping the watchdog by itself,
- * because this particular WDT has a very short timeout (1.6
- * seconds) and it would be insane to count on any userspace
- * daemon always getting scheduled within that time frame.
- *
- * This driver uses memory mapped IO, and spinlock.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define OUR_NAME "sc520_wdt"
-#define PFX OUR_NAME ": "
-
-/*
- * The AMD Elan SC520 timeout value is 492us times a power of 2 (0-7)
- *
- * 0: 492us 2: 1.01s 4: 4.03s 6: 16.22s
- * 1: 503ms 3: 2.01s 5: 8.05s 7: 32.21s
- *
- * We will program the SC520 watchdog for a timeout of 2.01s.
- * If we reset the watchdog every ~250ms we should be safe.
- */
-
-#define WDT_INTERVAL (HZ/4+1)
-
-/*
- * We must not require too good response from the userspace daemon.
- * Here we require the userspace daemon to send us a heartbeat
- * char to /dev/watchdog every 30 seconds.
- */
-
-#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * AMD Elan SC520 - Watchdog Timer Registers
- */
-#define MMCR_BASE 0xfffef000 /* The default base address */
-#define OFFS_WDTMRCTL 0xCB0 /* Watchdog Timer Control Register */
-
-/* WDT Control Register bit definitions */
-#define WDT_EXP_SEL_01 0x0001 /* [01] Time-out = 496 us (with 33 Mhz clk). */
-#define WDT_EXP_SEL_02 0x0002 /* [02] Time-out = 508 ms (with 33 Mhz clk). */
-#define WDT_EXP_SEL_03 0x0004 /* [03] Time-out = 1.02 s (with 33 Mhz clk). */
-#define WDT_EXP_SEL_04 0x0008 /* [04] Time-out = 2.03 s (with 33 Mhz clk). */
-#define WDT_EXP_SEL_05 0x0010 /* [05] Time-out = 4.07 s (with 33 Mhz clk). */
-#define WDT_EXP_SEL_06 0x0020 /* [06] Time-out = 8.13 s (with 33 Mhz clk). */
-#define WDT_EXP_SEL_07 0x0040 /* [07] Time-out = 16.27s (with 33 Mhz clk). */
-#define WDT_EXP_SEL_08 0x0080 /* [08] Time-out = 32.54s (with 33 Mhz clk). */
-#define WDT_IRQ_FLG 0x1000 /* [12] Interrupt Request Flag */
-#define WDT_WRST_ENB 0x4000 /* [14] Watchdog Timer Reset Enable */
-#define WDT_ENB 0x8000 /* [15] Watchdog Timer Enable */
-
-static __u16 __iomem *wdtmrctl;
-
-static void wdt_timer_ping(unsigned long);
-static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
-static unsigned long next_heartbeat;
-static unsigned long wdt_is_open;
-static char wdt_expect_close;
-static spinlock_t wdt_spinlock;
-
-/*
- * Whack the dog
- */
-
-static void wdt_timer_ping(unsigned long data)
-{
- /* If we got a heartbeat pulse within the WDT_US_INTERVAL
- * we agree to ping the WDT
- */
- if(time_before(jiffies, next_heartbeat))
- {
- /* Ping the WDT */
- spin_lock(&wdt_spinlock);
- writew(0xAAAA, wdtmrctl);
- writew(0x5555, wdtmrctl);
- spin_unlock(&wdt_spinlock);
-
- /* Re-set the timer interval */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
-}
-
-/*
- * Utility routines
- */
-
-static void wdt_config(int writeval)
-{
- __u16 dummy;
- unsigned long flags;
-
- /* buy some time (ping) */
- spin_lock_irqsave(&wdt_spinlock, flags);
- dummy=readw(wdtmrctl); /* ensure write synchronization */
- writew(0xAAAA, wdtmrctl);
- writew(0x5555, wdtmrctl);
- /* unlock WDT = make WDT configuration register writable one time */
- writew(0x3333, wdtmrctl);
- writew(0xCCCC, wdtmrctl);
- /* write WDT configuration register */
- writew(writeval, wdtmrctl);
- spin_unlock_irqrestore(&wdt_spinlock, flags);
-}
-
-static int wdt_startup(void)
-{
- next_heartbeat = jiffies + (timeout * HZ);
-
- /* Start the timer */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-
- /* Start the watchdog */
- wdt_config(WDT_ENB | WDT_WRST_ENB | WDT_EXP_SEL_04);
-
- printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
- return 0;
-}
-
-static int wdt_turnoff(void)
-{
- /* Stop the timer */
- del_timer(&timer);
-
- /* Stop the watchdog */
- wdt_config(0);
-
- printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
- return 0;
-}
-
-static int wdt_keepalive(void)
-{
- /* user land ping */
- next_heartbeat = jiffies + (timeout * HZ);
- return 0;
-}
-
-static int wdt_set_heartbeat(int t)
-{
- if ((t < 1) || (t > 3600)) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = t;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count) {
- if (!nowayout) {
- size_t ofs;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- wdt_expect_close = 0;
-
- /* now scan */
- for(ofs = 0; ofs != count; ofs++) {
- char c;
- if (get_user(c, buf + ofs))
- return -EFAULT;
- if(c == 'V')
- wdt_expect_close = 42;
- }
- }
-
- /* Well, anyhow someone wrote to us, we should return that favour */
- wdt_keepalive();
- }
- return count;
-}
-
-static int fop_open(struct inode * inode, struct file * file)
-{
- /* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Good, fire up the show */
- wdt_startup();
- return nonseekable_open(inode, file);
-}
-
-static int fop_close(struct inode * inode, struct file * file)
-{
- if(wdt_expect_close == 42) {
- wdt_turnoff();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- wdt_keepalive();
- }
- clear_bit(0, &wdt_is_open);
- wdt_expect_close = 0;
- return 0;
-}
-
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "SC520",
- };
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
-
- return retval;
- }
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(wdt_set_heartbeat(new_timeout))
- return -EINVAL;
-
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
- }
-}
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = fop_write,
- .open = fop_open,
- .release = fop_close,
- .ioctl = fop_ioctl,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-/*
- * Notifier for system down
- */
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT)
- wdt_turnoff();
- return NOTIFY_DONE;
-}
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier = {
- .notifier_call = wdt_notify_sys,
-};
-
-static void __exit sc520_wdt_unload(void)
-{
- if (!nowayout)
- wdt_turnoff();
-
- /* Deregister */
- misc_deregister(&wdt_miscdev);
- unregister_reboot_notifier(&wdt_notifier);
- iounmap(wdtmrctl);
-}
-
-static int __init sc520_wdt_init(void)
-{
- int rc = -EBUSY;
-
- spin_lock_init(&wdt_spinlock);
-
- /* Check that the timeout value is within it's range ; if not reset to the default */
- if (wdt_set_heartbeat(timeout)) {
- wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 1<=timeout<=3600, using %d\n",
- WATCHDOG_TIMEOUT);
- }
-
- wdtmrctl = ioremap((unsigned long)(MMCR_BASE + OFFS_WDTMRCTL), 2);
- if (!wdtmrctl) {
- printk(KERN_ERR PFX "Unable to remap memory\n");
- rc = -ENOMEM;
- goto err_out_region2;
- }
-
- rc = register_reboot_notifier(&wdt_notifier);
- if (rc) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_ioremap;
- }
-
- rc = misc_register(&wdt_miscdev);
- if (rc) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, rc);
- goto err_out_notifier;
- }
-
- printk(KERN_INFO PFX "WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
- timeout,nowayout);
-
- return 0;
-
-err_out_notifier:
- unregister_reboot_notifier(&wdt_notifier);
-err_out_ioremap:
- iounmap(wdtmrctl);
-err_out_region2:
- return rc;
-}
-
-module_init(sc520_wdt_init);
-module_exit(sc520_wdt_unload);
-
-MODULE_AUTHOR("Scott and Bill Jennings");
-MODULE_DESCRIPTION("Driver for watchdog timer in AMD \"Elan\" SC520 uProcessor");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/* drivers/char/watchdog/scx200_wdt.c
-
- National Semiconductor SCx200 Watchdog support
-
- Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
-
- Some code taken from:
- National Semiconductor PC87307/PC97307 (ala SC1200) WDT driver
- (c) Copyright 2002 Zwane Mwaikambo <zwane@commfireservices.com>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The author(s) of this software shall not be held liable for damages
- of any nature resulting due to the use of this software. This
- software is provided AS-IS with no warranties. */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/scx200.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#define NAME "scx200_wdt"
-
-MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
-MODULE_DESCRIPTION("NatSemi SCx200 Watchdog Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-static int margin = 60; /* in seconds */
-module_param(margin, int, 0);
-MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
-
-static u16 wdto_restart;
-static struct semaphore open_semaphore;
-static char expect_close;
-
-/* Bits of the WDCNFG register */
-#define W_ENABLE 0x00fa /* Enable watchdog */
-#define W_DISABLE 0x0000 /* Disable watchdog */
-
-/* The scaling factor for the timer, this depends on the value of W_ENABLE */
-#define W_SCALE (32768/1024)
-
-static void scx200_wdt_ping(void)
-{
- outw(wdto_restart, scx200_cb_base + SCx200_WDT_WDTO);
-}
-
-static void scx200_wdt_update_margin(void)
-{
- printk(KERN_INFO NAME ": timer margin %d seconds\n", margin);
- wdto_restart = margin * W_SCALE;
-}
-
-static void scx200_wdt_enable(void)
-{
- printk(KERN_DEBUG NAME ": enabling watchdog timer, wdto_restart = %d\n",
- wdto_restart);
-
- outw(0, scx200_cb_base + SCx200_WDT_WDTO);
- outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
- outw(W_ENABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
-
- scx200_wdt_ping();
-}
-
-static void scx200_wdt_disable(void)
-{
- printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
-
- outw(0, scx200_cb_base + SCx200_WDT_WDTO);
- outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
- outw(W_DISABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
-}
-
-static int scx200_wdt_open(struct inode *inode, struct file *file)
-{
- /* only allow one at a time */
- if (down_trylock(&open_semaphore))
- return -EBUSY;
- scx200_wdt_enable();
-
- return nonseekable_open(inode, file);
-}
-
-static int scx200_wdt_release(struct inode *inode, struct file *file)
-{
- if (expect_close != 42) {
- printk(KERN_WARNING NAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
- } else if (!nowayout) {
- scx200_wdt_disable();
- }
- expect_close = 0;
- up(&open_semaphore);
-
- return 0;
-}
-
-static int scx200_wdt_notify_sys(struct notifier_block *this,
- unsigned long code, void *unused)
-{
- if (code == SYS_HALT || code == SYS_POWER_OFF)
- if (!nowayout)
- scx200_wdt_disable();
-
- return NOTIFY_DONE;
-}
-
-static struct notifier_block scx200_wdt_notifier =
-{
- .notifier_call = scx200_wdt_notify_sys,
-};
-
-static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* check for a magic close character */
- if (len)
- {
- size_t i;
-
- scx200_wdt_ping();
-
- expect_close = 0;
- for (i = 0; i < len; ++i) {
- char c;
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
-
- return len;
- }
-
- return 0;
-}
-
-static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .identity = "NatSemi SCx200 Watchdog",
- .firmware_version = 1,
- .options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
- };
- int new_margin;
-
- switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- if(copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- return 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if (put_user(0, p))
- return -EFAULT;
- return 0;
- case WDIOC_KEEPALIVE:
- scx200_wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
- if (new_margin < 1)
- return -EINVAL;
- margin = new_margin;
- scx200_wdt_update_margin();
- scx200_wdt_ping();
- case WDIOC_GETTIMEOUT:
- if (put_user(margin, p))
- return -EFAULT;
- return 0;
- }
-}
-
-static const struct file_operations scx200_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = scx200_wdt_write,
- .ioctl = scx200_wdt_ioctl,
- .open = scx200_wdt_open,
- .release = scx200_wdt_release,
-};
-
-static struct miscdevice scx200_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &scx200_wdt_fops,
-};
-
-static int __init scx200_wdt_init(void)
-{
- int r;
-
- printk(KERN_DEBUG NAME ": NatSemi SCx200 Watchdog Driver\n");
-
- /* check that we have found the configuration block */
- if (!scx200_cb_present())
- return -ENODEV;
-
- if (!request_region(scx200_cb_base + SCx200_WDT_OFFSET,
- SCx200_WDT_SIZE,
- "NatSemi SCx200 Watchdog")) {
- printk(KERN_WARNING NAME ": watchdog I/O region busy\n");
- return -EBUSY;
- }
-
- scx200_wdt_update_margin();
- scx200_wdt_disable();
-
- sema_init(&open_semaphore, 1);
-
- r = misc_register(&scx200_wdt_miscdev);
- if (r) {
- release_region(scx200_cb_base + SCx200_WDT_OFFSET,
- SCx200_WDT_SIZE);
- return r;
- }
-
- r = register_reboot_notifier(&scx200_wdt_notifier);
- if (r) {
- printk(KERN_ERR NAME ": unable to register reboot notifier");
- misc_deregister(&scx200_wdt_miscdev);
- release_region(scx200_cb_base + SCx200_WDT_OFFSET,
- SCx200_WDT_SIZE);
- return r;
- }
-
- return 0;
-}
-
-static void __exit scx200_wdt_cleanup(void)
-{
- unregister_reboot_notifier(&scx200_wdt_notifier);
- misc_deregister(&scx200_wdt_miscdev);
- release_region(scx200_cb_base + SCx200_WDT_OFFSET,
- SCx200_WDT_SIZE);
-}
-
-module_init(scx200_wdt_init);
-module_exit(scx200_wdt_cleanup);
-
-/*
- Local variables:
- compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
- c-basic-offset: 8
- End:
-*/
+++ /dev/null
-/*
- * drivers/char/watchdog/shwdt.c
- *
- * Watchdog driver for integrated watchdog in the SuperH processors.
- *
- * Copyright (C) 2001, 2002, 2003 Paul Mundt <lethal@linux-sh.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- *
- * 19-Apr-2002 Rob Radez <rob@osinvestor.com>
- * Added expect close support, made emulated timeout runtime changeable
- * general cleanups, add some ioctls
- */
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/reboot.h>
-#include <linux/notifier.h>
-#include <linux/ioport.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/watchdog.h>
-
-#define PFX "shwdt: "
-
-/*
- * Default clock division ratio is 5.25 msecs. For an additional table of
- * values, consult the asm-sh/watchdog.h. Overload this at module load
- * time.
- *
- * In order for this to work reliably we need to have HZ set to 1000 or
- * something quite higher than 100 (or we need a proper high-res timer
- * implementation that will deal with this properly), otherwise the 10ms
- * resolution of a jiffy is enough to trigger the overflow. For things like
- * the SH-4 and SH-5, this isn't necessarily that big of a problem, though
- * for the SH-2 and SH-3, this isn't recommended unless the WDT is absolutely
- * necssary.
- *
- * As a result of this timing problem, the only modes that are particularly
- * feasible are the 4096 and the 2048 divisors, which yeild 5.25 and 2.62ms
- * overflow periods respectively.
- *
- * Also, since we can't really expect userspace to be responsive enough
- * before the overflow happens, we maintain two seperate timers .. One in
- * the kernel for clearing out WOVF every 2ms or so (again, this depends on
- * HZ == 1000), and another for monitoring userspace writes to the WDT device.
- *
- * As such, we currently use a configurable heartbeat interval which defaults
- * to 30s. In this case, the userspace daemon is only responsible for periodic
- * writes to the device before the next heartbeat is scheduled. If the daemon
- * misses its deadline, the kernel timer will allow the WDT to overflow.
- */
-static int clock_division_ratio = WTCSR_CKS_4096;
-
-#define next_ping_period(cks) msecs_to_jiffies(cks - 4)
-
-static void sh_wdt_ping(unsigned long data);
-
-static unsigned long shwdt_is_open;
-static struct watchdog_info sh_wdt_info;
-static char shwdt_expect_close;
-static DEFINE_TIMER(timer, sh_wdt_ping, 0, 0);
-static unsigned long next_heartbeat;
-
-#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
-static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-/**
- * sh_wdt_start - Start the Watchdog
- *
- * Starts the watchdog.
- */
-static void sh_wdt_start(void)
-{
- __u8 csr;
-
- next_heartbeat = jiffies + (heartbeat * HZ);
- mod_timer(&timer, next_ping_period(clock_division_ratio));
-
- csr = sh_wdt_read_csr();
- csr |= WTCSR_WT | clock_division_ratio;
- sh_wdt_write_csr(csr);
-
- sh_wdt_write_cnt(0);
-
- /*
- * These processors have a bit of an inconsistent initialization
- * process.. starting with SH-3, RSTS was moved to WTCSR, and the
- * RSTCSR register was removed.
- *
- * On the SH-2 however, in addition with bits being in different
- * locations, we must deal with RSTCSR outright..
- */
- csr = sh_wdt_read_csr();
- csr |= WTCSR_TME;
- csr &= ~WTCSR_RSTS;
- sh_wdt_write_csr(csr);
-
-#ifdef CONFIG_CPU_SH2
- /*
- * Whoever came up with the RSTCSR semantics must've been smoking
- * some of the good stuff, since in addition to the WTCSR/WTCNT write
- * brain-damage, it's managed to fuck things up one step further..
- *
- * If we need to clear the WOVF bit, the upper byte has to be 0xa5..
- * but if we want to touch RSTE or RSTS, the upper byte has to be
- * 0x5a..
- */
- csr = sh_wdt_read_rstcsr();
- csr &= ~RSTCSR_RSTS;
- sh_wdt_write_rstcsr(csr);
-#endif
-}
-
-/**
- * sh_wdt_stop - Stop the Watchdog
- * Stops the watchdog.
- */
-static void sh_wdt_stop(void)
-{
- __u8 csr;
-
- del_timer(&timer);
-
- csr = sh_wdt_read_csr();
- csr &= ~WTCSR_TME;
- sh_wdt_write_csr(csr);
-}
-
-/**
- * sh_wdt_keepalive - Keep the Userspace Watchdog Alive
- * The Userspace watchdog got a KeepAlive: schedule the next heartbeat.
- */
-static inline void sh_wdt_keepalive(void)
-{
- next_heartbeat = jiffies + (heartbeat * HZ);
-}
-
-/**
- * sh_wdt_set_heartbeat - Set the Userspace Watchdog heartbeat
- * Set the Userspace Watchdog heartbeat
- */
-static int sh_wdt_set_heartbeat(int t)
-{
- if (unlikely((t < 1) || (t > 3600))) /* arbitrary upper limit */
- return -EINVAL;
-
- heartbeat = t;
- return 0;
-}
-
-/**
- * sh_wdt_ping - Ping the Watchdog
- * @data: Unused
- *
- * Clears overflow bit, resets timer counter.
- */
-static void sh_wdt_ping(unsigned long data)
-{
- if (time_before(jiffies, next_heartbeat)) {
- __u8 csr;
-
- csr = sh_wdt_read_csr();
- csr &= ~WTCSR_IOVF;
- sh_wdt_write_csr(csr);
-
- sh_wdt_write_cnt(0);
-
- mod_timer(&timer, next_ping_period(clock_division_ratio));
- } else
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping "
- "the watchdog\n");
-}
-
-/**
- * sh_wdt_open - Open the Device
- * @inode: inode of device
- * @file: file handle of device
- *
- * Watchdog device is opened and started.
- */
-static int sh_wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &shwdt_is_open))
- return -EBUSY;
- if (nowayout)
- __module_get(THIS_MODULE);
-
- sh_wdt_start();
-
- return nonseekable_open(inode, file);
-}
-
-/**
- * sh_wdt_close - Close the Device
- * @inode: inode of device
- * @file: file handle of device
- *
- * Watchdog device is closed and stopped.
- */
-static int sh_wdt_close(struct inode *inode, struct file *file)
-{
- if (shwdt_expect_close == 42) {
- sh_wdt_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not "
- "stopping watchdog!\n");
- sh_wdt_keepalive();
- }
-
- clear_bit(0, &shwdt_is_open);
- shwdt_expect_close = 0;
-
- return 0;
-}
-
-/**
- * sh_wdt_write - Write to Device
- * @file: file handle of device
- * @buf: buffer to write
- * @count: length of buffer
- * @ppos: offset
- *
- * Pings the watchdog on write.
- */
-static ssize_t sh_wdt_write(struct file *file, const char *buf,
- size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- shwdt_expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- shwdt_expect_close = 42;
- }
- }
- sh_wdt_keepalive();
- }
-
- return count;
-}
-
-/**
- * sh_wdt_mmap - map WDT/CPG registers into userspace
- * @file: file structure for the device
- * @vma: VMA to map the registers into
- *
- * A simple mmap() implementation for the corner cases where the counter
- * needs to be mapped in userspace directly. Due to the relatively small
- * size of the area, neighbouring registers not necessarily tied to the
- * CPG will also be accessible through the register page, so this remains
- * configurable for users that really know what they're doing.
- *
- * Additionaly, the register page maps in the CPG register base relative
- * to the nearest page-aligned boundary, which requires that userspace do
- * the appropriate CPU subtype math for calculating the page offset for
- * the counter value.
- */
-static int sh_wdt_mmap(struct file *file, struct vm_area_struct *vma)
-{
- int ret = -ENOSYS;
-
-#ifdef CONFIG_SH_WDT_MMAP
- unsigned long addr;
-
- /* Only support the simple cases where we map in a register page. */
- if (((vma->vm_end - vma->vm_start) != PAGE_SIZE) || vma->vm_pgoff)
- return -EINVAL;
-
- /*
- * Pick WTCNT as the start, it's usually the first register after the
- * FRQCR, and neither one are generally page-aligned out of the box.
- */
- addr = WTCNT & ~(PAGE_SIZE - 1);
-
- vma->vm_flags |= VM_IO;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
- PAGE_SIZE, vma->vm_page_prot)) {
- printk(KERN_ERR PFX "%s: io_remap_pfn_range failed\n",
- __FUNCTION__);
- return -EAGAIN;
- }
-
- ret = 0;
-#endif
-
- return ret;
-}
-
-/**
- * sh_wdt_ioctl - Query Device
- * @inode: inode of device
- * @file: file handle of device
- * @cmd: watchdog command
- * @arg: argument
- *
- * Query basic information from the device or ping it, as outlined by the
- * watchdog API.
- */
-static int sh_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_heartbeat;
- int options, retval = -EINVAL;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user((struct watchdog_info *)arg,
- &sh_wdt_info,
- sizeof(sh_wdt_info)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, (int *)arg);
- case WDIOC_KEEPALIVE:
- sh_wdt_keepalive();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, (int *)arg))
- return -EFAULT;
-
- if (sh_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- sh_wdt_keepalive();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, (int *)arg);
- case WDIOC_SETOPTIONS:
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- sh_wdt_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- sh_wdt_start();
- retval = 0;
- }
-
- return retval;
- default:
- return -ENOTTY;
- }
-
- return 0;
-}
-
-/**
- * sh_wdt_notify_sys - Notifier Handler
- * @this: notifier block
- * @code: notifier event
- * @unused: unused
- *
- * Handles specific events, such as turning off the watchdog during a
- * shutdown event.
- */
-static int sh_wdt_notify_sys(struct notifier_block *this,
- unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- sh_wdt_stop();
-
- return NOTIFY_DONE;
-}
-
-static const struct file_operations sh_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = sh_wdt_write,
- .ioctl = sh_wdt_ioctl,
- .open = sh_wdt_open,
- .release = sh_wdt_close,
- .mmap = sh_wdt_mmap,
-};
-
-static struct watchdog_info sh_wdt_info = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "SH WDT",
-};
-
-static struct notifier_block sh_wdt_notifier = {
- .notifier_call = sh_wdt_notify_sys,
-};
-
-static struct miscdevice sh_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &sh_wdt_fops,
-};
-
-/**
- * sh_wdt_init - Initialize module
- * Registers the device and notifier handler. Actual device
- * initialization is handled by sh_wdt_open().
- */
-static int __init sh_wdt_init(void)
-{
- int rc;
-
- if ((clock_division_ratio < 0x5) || (clock_division_ratio > 0x7)) {
- clock_division_ratio = WTCSR_CKS_4096;
- printk(KERN_INFO PFX "clock_division_ratio value must "
- "be 0x5<=x<=0x7, using %d\n", clock_division_ratio);
- }
-
- rc = sh_wdt_set_heartbeat(heartbeat);
- if (unlikely(rc)) {
- heartbeat = WATCHDOG_HEARTBEAT;
- printk(KERN_INFO PFX "heartbeat value must "
- "be 1<=x<=3600, using %d\n", heartbeat);
- }
-
- rc = register_reboot_notifier(&sh_wdt_notifier);
- if (unlikely(rc)) {
- printk(KERN_ERR PFX "Can't register reboot notifier (err=%d)\n",
- rc);
- return rc;
- }
-
- rc = misc_register(&sh_wdt_miscdev);
- if (unlikely(rc)) {
- printk(KERN_ERR PFX "Can't register miscdev on "
- "minor=%d (err=%d)\n", sh_wdt_miscdev.minor, rc);
- unregister_reboot_notifier(&sh_wdt_notifier);
- return rc;
- }
-
- printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-
- return 0;
-}
-
-/**
- * sh_wdt_exit - Deinitialize module
- * Unregisters the device and notifier handler. Actual device
- * deinitialization is handled by sh_wdt_close().
- */
-static void __exit sh_wdt_exit(void)
-{
- misc_deregister(&sh_wdt_miscdev);
- unregister_reboot_notifier(&sh_wdt_notifier);
-}
-
-MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
-MODULE_DESCRIPTION("SuperH watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(clock_division_ratio, int, 0);
-MODULE_PARM_DESC(clock_division_ratio, "Clock division ratio. Valid ranges are from 0x5 (1.31ms) to 0x7 (5.25ms). (default=" __MODULE_STRING(clock_division_ratio) ")");
-
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<=heartbeat<=3600, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-module_init(sh_wdt_init);
-module_exit(sh_wdt_exit);
+++ /dev/null
-/*
- * SMsC 37B787 Watchdog Timer driver for Linux 2.6.x.x
- *
- * Based on acquirewdt.c by Alan Cox <alan@redhat.com>
- * and some other existing drivers
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The authors do NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
- *
- * (C) Copyright 2003-2006 Sven Anders <anders@anduras.de>
- *
- * History:
- * 2003 - Created version 1.0 for Linux 2.4.x.
- * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
- * features. Released version 1.1
- *
- * Theory of operation:
- *
- * A Watchdog Timer (WDT) is a hardware circuit that can
- * reset the computer system in case of a software fault.
- * You probably knew that already.
- *
- * Usually a userspace daemon will notify the kernel WDT driver
- * via the /dev/watchdog special device file that userspace is
- * still alive, at regular intervals. When such a notification
- * occurs, the driver will usually tell the hardware watchdog
- * that everything is in order, and that the watchdog should wait
- * for yet another little while to reset the system.
- * If userspace fails (RAM error, kernel bug, whatever), the
- * notifications cease to occur, and the hardware watchdog will
- * reset the system (causing a reboot) after the timeout occurs.
- *
- * Create device with:
- * mknod /dev/watchdog c 10 130
- *
- * For an example userspace keep-alive daemon, see:
- * Documentation/watchdog/watchdog.txt
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/delay.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-/* enable support for minutes as units? */
-/* (does not always work correctly, so disabled by default!) */
-#define SMSC_SUPPORT_MINUTES
-#undef SMSC_SUPPORT_MINUTES
-
-#define MAX_TIMEOUT 255
-
-#define UNIT_SECOND 0
-#define UNIT_MINUTE 1
-
-#define MODNAME "smsc37b787_wdt: "
-#define VERSION "1.1"
-
-#define IOPORT 0x3F0
-#define IOPORT_SIZE 2
-#define IODEV_NO 8
-
-static int unit = UNIT_SECOND; /* timer's unit */
-static int timeout = 60; /* timeout value: default is 60 "units" */
-static unsigned long timer_enabled = 0; /* is the timer enabled? */
-
-static char expect_close; /* is the close expected? */
-
-static spinlock_t io_lock; /* to guard the watchdog from io races */
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-
-/* -- Low level function ----------------------------------------*/
-
-/* unlock the IO chip */
-
-static inline void open_io_config(void)
-{
- outb(0x55, IOPORT);
- mdelay(1);
- outb(0x55, IOPORT);
-}
-
-/* lock the IO chip */
-static inline void close_io_config(void)
-{
- outb(0xAA, IOPORT);
-}
-
-/* select the IO device */
-static inline void select_io_device(unsigned char devno)
-{
- outb(0x07, IOPORT);
- outb(devno, IOPORT+1);
-}
-
-/* write to the control register */
-static inline void write_io_cr(unsigned char reg, unsigned char data)
-{
- outb(reg, IOPORT);
- outb(data, IOPORT+1);
-}
-
-/* read from the control register */
-static inline char read_io_cr(unsigned char reg)
-{
- outb(reg, IOPORT);
- return inb(IOPORT+1);
-}
-
-/* -- Medium level functions ------------------------------------*/
-
-static inline void gpio_bit12(unsigned char reg)
-{
- // -- General Purpose I/O Bit 1.2 --
- // Bit 0, In/Out: 0 = Output, 1 = Input
- // Bit 1, Polarity: 0 = No Invert, 1 = Invert
- // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
- // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
- // 11 = Either Edge Triggered Intr. 2
- // Bit 5/6 (Reserved)
- // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
- write_io_cr(0xE2, reg);
-}
-
-static inline void gpio_bit13(unsigned char reg)
-{
- // -- General Purpose I/O Bit 1.3 --
- // Bit 0, In/Out: 0 = Output, 1 = Input
- // Bit 1, Polarity: 0 = No Invert, 1 = Invert
- // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
- // Bit 3, Function select: 0 = GPI/O, 1 = LED
- // Bit 4-6 (Reserved)
- // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
- write_io_cr(0xE3, reg);
-}
-
-static inline void wdt_timer_units(unsigned char new_units)
-{
- // -- Watchdog timer units --
- // Bit 0-6 (Reserved)
- // Bit 7, WDT Time-out Value Units Select
- // (0 = Minutes, 1 = Seconds)
- write_io_cr(0xF1, new_units);
-}
-
-static inline void wdt_timeout_value(unsigned char new_timeout)
-{
- // -- Watchdog Timer Time-out Value --
- // Bit 0-7 Binary coded units (0=Disabled, 1..255)
- write_io_cr(0xF2, new_timeout);
-}
-
-static inline void wdt_timer_conf(unsigned char conf)
-{
- // -- Watchdog timer configuration --
- // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O
- // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
- // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr.
- // Bit 3 Reset the timer
- // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled)
- // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
- // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
- write_io_cr(0xF3, conf);
-}
-
-static inline void wdt_timer_ctrl(unsigned char reg)
-{
- // -- Watchdog timer control --
- // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
- // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
- // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
- // Bit 3 P20 Force Timeout enabled:
- // 0 = P20 activity does not generate the WD timeout event
- // 1 = P20 Allows rising edge of P20, from the keyboard
- // controller, to force the WD timeout event.
- // Bit 4 (Reserved)
- // -- Soft power management --
- // Bit 5 Stop Counter: 1 = Stop software power down counter
- // set via register 0xB8, (self-cleaning)
- // (Upon read: 0 = Counter running, 1 = Counter stopped)
- // Bit 6 Restart Counter: 1 = Restart software power down counter
- // set via register 0xB8, (self-cleaning)
- // Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
-
- write_io_cr(0xF4, reg);
-}
-
-/* -- Higher level functions ------------------------------------*/
-
-/* initialize watchdog */
-
-static void wb_smsc_wdt_initialize(void)
-{
- unsigned char old;
-
- spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
-
- // enable the watchdog
- gpio_bit13(0x08); // Select pin 80 = LED not GPIO
- gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert
-
- // disable the timeout
- wdt_timeout_value(0);
-
- // reset control register
- wdt_timer_ctrl(0x00);
-
- // reset configuration register
- wdt_timer_conf(0x00);
-
- // read old (timer units) register
- old = read_io_cr(0xF1) & 0x7F;
- if (unit == UNIT_SECOND) old |= 0x80; // set to seconds
-
- // set the watchdog timer units
- wdt_timer_units(old);
-
- close_io_config();
- spin_unlock(&io_lock);
-}
-
-/* shutdown the watchdog */
-
-static void wb_smsc_wdt_shutdown(void)
-{
- spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
-
- // disable the watchdog
- gpio_bit13(0x09);
- gpio_bit12(0x09);
-
- // reset watchdog config register
- wdt_timer_conf(0x00);
-
- // reset watchdog control register
- wdt_timer_ctrl(0x00);
-
- // disable timeout
- wdt_timeout_value(0x00);
-
- close_io_config();
- spin_unlock(&io_lock);
-}
-
-/* set timeout => enable watchdog */
-
-static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
-{
- spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
-
- // set Power LED to blink, if we enable the timeout
- wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
-
- // set timeout value
- wdt_timeout_value(new_timeout);
-
- close_io_config();
- spin_unlock(&io_lock);
-}
-
-/* get timeout */
-
-static unsigned char wb_smsc_wdt_get_timeout(void)
-{
- unsigned char set_timeout;
-
- spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
- set_timeout = read_io_cr(0xF2);
- close_io_config();
- spin_unlock(&io_lock);
-
- return set_timeout;
-}
-
-/* disable watchdog */
-
-static void wb_smsc_wdt_disable(void)
-{
- // set the timeout to 0 to disable the watchdog
- wb_smsc_wdt_set_timeout(0);
-}
-
-/* enable watchdog by setting the current timeout */
-
-static void wb_smsc_wdt_enable(void)
-{
- // set the current timeout...
- wb_smsc_wdt_set_timeout(timeout);
-}
-
-/* reset the timer */
-
-static void wb_smsc_wdt_reset_timer(void)
-{
- spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
-
- // reset the timer
- wdt_timeout_value(timeout);
- wdt_timer_conf(0x08);
-
- close_io_config();
- spin_unlock(&io_lock);
-}
-
-/* return, if the watchdog is enabled (timeout is set...) */
-
-static int wb_smsc_wdt_status(void)
-{
- return (wb_smsc_wdt_get_timeout() == 0) ? 0 : WDIOF_KEEPALIVEPING;
-}
-
-
-/* -- File operations -------------------------------------------*/
-
-/* open => enable watchdog and set initial timeout */
-
-static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
-{
- /* /dev/watchdog can only be opened once */
-
- if (test_and_set_bit(0, &timer_enabled))
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- /* Reload and activate timer */
- wb_smsc_wdt_enable();
-
- printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
-
- return nonseekable_open(inode, file);
-}
-
-/* close => shut off the timer */
-
-static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
-{
- /* Shut off the timer. */
-
- if (expect_close == 42) {
- wb_smsc_wdt_disable();
- printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n");
- } else {
- printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n");
- wb_smsc_wdt_reset_timer();
- }
-
- clear_bit(0, &timer_enabled);
- expect_close = 0;
- return 0;
-}
-
-/* write => update the timer to keep the machine alive */
-
-static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (len) {
- if (!nowayout) {
- size_t i;
-
- /* reset expect flag */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
-
- /* someone wrote to us, we should reload the timer */
- wb_smsc_wdt_reset_timer();
- }
- return len;
-}
-
-/* ioctl => control interface */
-
-static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int new_timeout;
-
- union {
- struct watchdog_info __user *ident;
- int __user *i;
- } uarg;
-
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "SMsC 37B787 Watchdog"
- };
-
- uarg.i = (int __user *)arg;
-
- switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident,
- sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user(wb_smsc_wdt_status(), uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- wb_smsc_wdt_reset_timer();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- // the API states this is given in secs
- if (unit == UNIT_MINUTE)
- new_timeout /= 60;
-
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- wb_smsc_wdt_set_timeout(timeout);
-
- // fall through and return the new timeout...
-
- case WDIOC_GETTIMEOUT:
-
- new_timeout = timeout;
-
- if (unit == UNIT_MINUTE)
- new_timeout *= 60;
-
- return put_user(new_timeout, uarg.i);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, uarg.i))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wb_smsc_wdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wb_smsc_wdt_enable();
- retval = 0;
- }
-
- return retval;
- }
- }
-}
-
-/* -- Notifier funtions -----------------------------------------*/
-
-static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT)
- {
- // set timeout to 0, to avoid possible race-condition
- timeout = 0;
- wb_smsc_wdt_disable();
- }
- return NOTIFY_DONE;
-}
-
-/* -- Module's structures ---------------------------------------*/
-
-static const struct file_operations wb_smsc_wdt_fops =
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wb_smsc_wdt_write,
- .ioctl = wb_smsc_wdt_ioctl,
- .open = wb_smsc_wdt_open,
- .release = wb_smsc_wdt_release,
-};
-
-static struct notifier_block wb_smsc_wdt_notifier =
-{
- .notifier_call = wb_smsc_wdt_notify_sys,
-};
-
-static struct miscdevice wb_smsc_wdt_miscdev =
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wb_smsc_wdt_fops,
-};
-
-/* -- Module init functions -------------------------------------*/
-
-/* module's "constructor" */
-
-static int __init wb_smsc_wdt_init(void)
-{
- int ret;
-
- spin_lock_init(&io_lock);
-
- printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n");
-
- if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
- printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT);
- ret = -EBUSY;
- goto out_pnp;
- }
-
- // set new maximum, if it's too big
- if (timeout > MAX_TIMEOUT)
- timeout = MAX_TIMEOUT;
-
- // init the watchdog timer
- wb_smsc_wdt_initialize();
-
- ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
- if (ret) {
- printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret);
- goto out_io;
- }
-
- ret = misc_register(&wb_smsc_wdt_miscdev);
- if (ret) {
- printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
- goto out_rbt;
- }
-
- // output info
- printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
- printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout);
-
- // ret = 0
-
-out_clean:
- return ret;
-
-out_rbt:
- unregister_reboot_notifier(&wb_smsc_wdt_notifier);
-
-out_io:
- release_region(IOPORT, IOPORT_SIZE);
-
-out_pnp:
- goto out_clean;
-}
-
-/* module's "destructor" */
-
-static void __exit wb_smsc_wdt_exit(void)
-{
- /* Stop the timer before we leave */
- if (!nowayout)
- {
- wb_smsc_wdt_shutdown();
- printk(KERN_INFO MODNAME "Watchdog disabled.\n");
- }
-
- misc_deregister(&wb_smsc_wdt_miscdev);
- unregister_reboot_notifier(&wb_smsc_wdt_notifier);
- release_region(IOPORT, IOPORT_SIZE);
-
- printk("SMsC 37B787 watchdog component driver removed.\n");
-}
-
-module_init(wb_smsc_wdt_init);
-module_exit(wb_smsc_wdt_exit);
-
-MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
-MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")");
-MODULE_LICENSE("GPL");
-
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-#ifdef SMSC_SUPPORT_MINUTES
-module_param(unit, int, 0);
-MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0");
-#endif
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
-
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+++ /dev/null
-/*
- * SoftDog 0.07: A Software Watchdog Device
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Software only watchdog driver. Unlike its big brother the WDT501P
- * driver this won't always recover a failed machine.
- *
- * 03/96: Angelo Haritsis <ah@doc.ic.ac.uk> :
- * Modularised.
- * Added soft_margin; use upon insmod to change the timer delay.
- * NB: uses same minor as wdt (WATCHDOG_MINOR); we could use separate
- * minors.
- *
- * 19980911 Alan Cox
- * Made SMP safe for 2.3.x
- *
- * 20011127 Joel Becker (jlbec@evilplan.org>
- * Added soft_noboot; Allows testing the softdog trigger without
- * requiring a recompile.
- * Added WDIOC_GETTIMEOUT and WDIOC_SETTIMOUT.
- *
- * 20020530 Joel Becker <joel.becker@oracle.com>
- * Added Matt Domsch's nowayout module option.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-
-#include <asm/uaccess.h>
-
-#define PFX "SoftDog: "
-
-#define TIMER_MARGIN 60 /* Default is 60 seconds */
-static int soft_margin = TIMER_MARGIN; /* in seconds */
-module_param(soft_margin, int, 0);
-MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-#ifdef ONLY_TESTING
-static int soft_noboot = 1;
-#else
-static int soft_noboot = 0;
-#endif /* ONLY_TESTING */
-
-module_param(soft_noboot, int, 0);
-MODULE_PARM_DESC(soft_noboot, "Softdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
-
-/*
- * Our timer
- */
-
-static void watchdog_fire(unsigned long);
-
-static struct timer_list watchdog_ticktock =
- TIMER_INITIALIZER(watchdog_fire, 0, 0);
-static unsigned long driver_open, orphan_timer;
-static char expect_close;
-
-
-/*
- * If the timer expires..
- */
-
-static void watchdog_fire(unsigned long data)
-{
- if (test_and_clear_bit(0, &orphan_timer))
- module_put(THIS_MODULE);
-
- if (soft_noboot)
- printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n");
- else
- {
- printk(KERN_CRIT PFX "Initiating system reboot.\n");
- emergency_restart();
- printk(KERN_CRIT PFX "Reboot didn't ?????\n");
- }
-}
-
-/*
- * Softdog operations
- */
-
-static int softdog_keepalive(void)
-{
- mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
- return 0;
-}
-
-static int softdog_stop(void)
-{
- del_timer(&watchdog_ticktock);
- return 0;
-}
-
-static int softdog_set_heartbeat(int t)
-{
- if ((t < 0x0001) || (t > 0xFFFF))
- return -EINVAL;
-
- soft_margin = t;
- return 0;
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static int softdog_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &driver_open))
- return -EBUSY;
- if (!test_and_clear_bit(0, &orphan_timer))
- __module_get(THIS_MODULE);
- /*
- * Activate timer
- */
- softdog_keepalive();
- return nonseekable_open(inode, file);
-}
-
-static int softdog_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
- if (expect_close == 42) {
- softdog_stop();
- module_put(THIS_MODULE);
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- set_bit(0, &orphan_timer);
- softdog_keepalive();
- }
- clear_bit(0, &driver_open);
- expect_close = 0;
- return 0;
-}
-
-static ssize_t softdog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
-{
- /*
- * Refresh the timer.
- */
- if(len) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != len; i++) {
- char c;
-
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- softdog_keepalive();
- }
- return len;
-}
-
-static int softdog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_margin;
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
- .firmware_version = 0,
- .identity = "Software Watchdog",
- };
- switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- softdog_keepalive();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
- if (softdog_set_heartbeat(new_margin))
- return -EINVAL;
- softdog_keepalive();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(soft_margin, p);
- }
-}
-
-/*
- * Notifier for system down
- */
-
-static int softdog_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- softdog_stop();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations softdog_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = softdog_write,
- .ioctl = softdog_ioctl,
- .open = softdog_open,
- .release = softdog_release,
-};
-
-static struct miscdevice softdog_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &softdog_fops,
-};
-
-static struct notifier_block softdog_notifier = {
- .notifier_call = softdog_notify_sys,
-};
-
-static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.07 initialized. soft_noboot=%d soft_margin=%d sec (nowayout= %d)\n";
-
-static int __init watchdog_init(void)
-{
- int ret;
-
- /* Check that the soft_margin value is within it's range ; if not reset to the default */
- if (softdog_set_heartbeat(soft_margin)) {
- softdog_set_heartbeat(TIMER_MARGIN);
- printk(KERN_INFO PFX "soft_margin value must be 0<soft_margin<65536, using %d\n",
- TIMER_MARGIN);
- }
-
- ret = register_reboot_notifier(&softdog_notifier);
- if (ret) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- return ret;
- }
-
- ret = misc_register(&softdog_miscdev);
- if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- unregister_reboot_notifier(&softdog_notifier);
- return ret;
- }
-
- printk(banner, soft_noboot, soft_margin, nowayout);
-
- return 0;
-}
-
-static void __exit watchdog_exit(void)
-{
- misc_deregister(&softdog_miscdev);
- unregister_reboot_notifier(&softdog_notifier);
-}
-
-module_init(watchdog_init);
-module_exit(watchdog_exit);
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_DESCRIPTION("Software Watchdog Device Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * w83627hf/thf WDT driver
- *
- * (c) Copyright 2007 Vlad Drukker <vlad@storewiz.com>
- * added support for W83627THF.
- *
- * (c) Copyright 2003,2007 Pádraig Brady <P@draigBrady.com>
- *
- * Based on advantechwdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@redhat.com>
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define WATCHDOG_NAME "w83627hf/thf/hg WDT"
-#define PFX WATCHDOG_NAME ": "
-#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
-
-static unsigned long wdt_is_open;
-static char expect_close;
-static spinlock_t io_lock;
-
-/* You must set this - there is no sane way to probe for this board. */
-static int wdt_io = 0x2E;
-module_param(wdt_io, int, 0);
-MODULE_PARM_DESC(wdt_io, "w83627hf/thf WDT io port (default 0x2E)");
-
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Kernel methods.
- */
-
-#define WDT_EFER (wdt_io+0) /* Extended Function Enable Registers */
-#define WDT_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
-#define WDT_EFDR (WDT_EFIR+1) /* Extended Function Data Register */
-
-static void
-w83627hf_select_wd_register(void)
-{
- unsigned char c;
- outb_p(0x87, WDT_EFER); /* Enter extended function mode */
- outb_p(0x87, WDT_EFER); /* Again according to manual */
-
- outb(0x20, WDT_EFER); /* check chip version */
- c = inb(WDT_EFDR);
- if (c == 0x82) { /* W83627THF */
- outb_p(0x2b, WDT_EFER); /* select GPIO3 */
- c = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
- outb_p(0x2b, WDT_EFER);
- outb_p(c, WDT_EFDR); /* set GPIO3 to WDT0 */
- }
-
- outb_p(0x07, WDT_EFER); /* point to logical device number reg */
- outb_p(0x08, WDT_EFDR); /* select logical device 8 (GPIO2) */
- outb_p(0x30, WDT_EFER); /* select CR30 */
- outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
-}
-
-static void
-w83627hf_unselect_wd_register(void)
-{
- outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
-}
-
-/* tyan motherboards seem to set F5 to 0x4C ?
- * So explicitly init to appropriate value. */
-static void
-w83627hf_init(void)
-{
- unsigned char t;
-
- w83627hf_select_wd_register();
-
- outb_p(0xF6, WDT_EFER); /* Select CRF6 */
- t=inb_p(WDT_EFDR); /* read CRF6 */
- if (t != 0) {
- printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
- outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
- }
-
- outb_p(0xF5, WDT_EFER); /* Select CRF5 */
- t=inb_p(WDT_EFDR); /* read CRF5 */
- t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */
- outb_p(t, WDT_EFDR); /* Write back to CRF5 */
-
- outb_p(0xF7, WDT_EFER); /* Select CRF7 */
- t=inb_p(WDT_EFDR); /* read CRF7 */
- t&=~0xC0; /* disable keyboard & mouse turning off watchdog */
- outb_p(t, WDT_EFDR); /* Write back to CRF7 */
-
- w83627hf_unselect_wd_register();
-}
-
-static void
-wdt_ctrl(int timeout)
-{
- spin_lock(&io_lock);
-
- w83627hf_select_wd_register();
-
- outb_p(0xF6, WDT_EFER); /* Select CRF6 */
- outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF6 */
-
- w83627hf_unselect_wd_register();
-
- spin_unlock(&io_lock);
-}
-
-static int
-wdt_ping(void)
-{
- wdt_ctrl(timeout);
- return 0;
-}
-
-static int
-wdt_disable(void)
-{
- wdt_ctrl(0);
- return 0;
-}
-
-static int
-wdt_set_heartbeat(int t)
-{
- if ((t < 1) || (t > 255))
- return -EINVAL;
-
- timeout = t;
- return 0;
-}
-
-static ssize_t
-wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- wdt_ping();
- }
- return count;
-}
-
-static int
-wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_timeout;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "W83627HF WDT",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- wdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (wdt_set_heartbeat(new_timeout))
- return -EINVAL;
- wdt_ping();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wdt_ping();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int
-wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
- /*
- * Activate
- */
-
- wdt_ping();
- return nonseekable_open(inode, file);
-}
-
-static int
-wdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wdt_disable();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- wdt_ping();
- }
- expect_close = 0;
- clear_bit(0, &wdt_is_open);
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int
-wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
- wdt_disable();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdt_write,
- .ioctl = wdt_ioctl,
- .open = wdt_open,
- .release = wdt_close,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier = {
- .notifier_call = wdt_notify_sys,
-};
-
-static int __init
-wdt_init(void)
-{
- int ret;
-
- spin_lock_init(&io_lock);
-
- printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF/THF/HG Super I/O chip initialising.\n");
-
- if (wdt_set_heartbeat(timeout)) {
- wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
- WATCHDOG_TIMEOUT);
- }
-
- if (!request_region(wdt_io, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_io);
- ret = -EIO;
- goto out;
- }
-
- w83627hf_init();
-
- ret = register_reboot_notifier(&wdt_notifier);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto unreg_regions;
- }
-
- ret = misc_register(&wdt_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto unreg_reboot;
- }
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
-out:
- return ret;
-unreg_reboot:
- unregister_reboot_notifier(&wdt_notifier);
-unreg_regions:
- release_region(wdt_io, 1);
- goto out;
-}
-
-static void __exit
-wdt_exit(void)
-{
- misc_deregister(&wdt_miscdev);
- unregister_reboot_notifier(&wdt_notifier);
- release_region(wdt_io,1);
-}
-
-module_init(wdt_init);
-module_exit(wdt_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Pádraig Brady <P@draigBrady.com>");
-MODULE_DESCRIPTION("w83627hf/thf WDT driver");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * w83697hf/hg WDT driver
- *
- * (c) Copyright 2006 Samuel Tardieu <sam@rfc1149.net>
- * (c) Copyright 2006 Marcus Junker <junker@anduras.de>
- *
- * Based on w83627hf_wdt.c which is based on advantechwdt.c
- * which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 2003 Pádraig Brady <P@draigBrady.com>
- *
- * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Marcus Junker nor ANDURAS AG admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define WATCHDOG_NAME "w83697hf/hg WDT"
-#define PFX WATCHDOG_NAME ": "
-#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
-
-static unsigned long wdt_is_open;
-static char expect_close;
-static spinlock_t io_lock;
-
-/* You must set this - there is no sane way to probe for this board. */
-static int wdt_io = 0x2e;
-module_param(wdt_io, int, 0);
-MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)");
-
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Kernel methods.
- */
-
-#define W83697HF_EFER (wdt_io+0) /* Extended Function Enable Register */
-#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
-#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */
-
-static inline void
-w83697hf_unlock(void)
-{
- outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */
- outb_p(0x87, W83697HF_EFER); /* Again according to manual */
-}
-
-static inline void
-w83697hf_lock(void)
-{
- outb_p(0xAA, W83697HF_EFER); /* Leave extended function mode */
-}
-
-/*
- * The three functions w83697hf_get_reg(), w83697hf_set_reg() and
- * w83697hf_write_timeout() must be called with the device unlocked.
- */
-
-static unsigned char
-w83697hf_get_reg(unsigned char reg)
-{
- outb_p(reg, W83697HF_EFIR);
- return inb_p(W83697HF_EFDR);
-}
-
-static void
-w83697hf_set_reg(unsigned char reg, unsigned char data)
-{
- outb_p(reg, W83697HF_EFIR);
- outb_p(data, W83697HF_EFDR);
-}
-
-static void
-w83697hf_write_timeout(int timeout)
-{
- w83697hf_set_reg(0xF4, timeout); /* Write Timeout counter to CRF4 */
-}
-
-static void
-w83697hf_select_wdt(void)
-{
- w83697hf_unlock();
- w83697hf_set_reg(0x07, 0x08); /* Switch to logic device 8 (GPIO2) */
-}
-
-static inline void
-w83697hf_deselect_wdt(void)
-{
- w83697hf_lock();
-}
-
-static void
-w83697hf_init(void)
-{
- unsigned char bbuf;
-
- w83697hf_select_wdt();
-
- bbuf = w83697hf_get_reg(0x29);
- bbuf &= ~0x60;
- bbuf |= 0x20;
- w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
-
- bbuf = w83697hf_get_reg(0xF3);
- bbuf &= ~0x04;
- w83697hf_set_reg(0xF3, bbuf); /* Count mode is seconds */
-
- w83697hf_deselect_wdt();
-}
-
-static int
-wdt_ping(void)
-{
- spin_lock(&io_lock);
- w83697hf_select_wdt();
-
- w83697hf_write_timeout(timeout);
-
- w83697hf_deselect_wdt();
- spin_unlock(&io_lock);
- return 0;
-}
-
-static int
-wdt_enable(void)
-{
- spin_lock(&io_lock);
- w83697hf_select_wdt();
-
- w83697hf_write_timeout(timeout);
- w83697hf_set_reg(0x30, 1); /* Enable timer */
-
- w83697hf_deselect_wdt();
- spin_unlock(&io_lock);
- return 0;
-}
-
-static int
-wdt_disable(void)
-{
- spin_lock(&io_lock);
- w83697hf_select_wdt();
-
- w83697hf_set_reg(0x30, 0); /* Disable timer */
- w83697hf_write_timeout(0);
-
- w83697hf_deselect_wdt();
- spin_unlock(&io_lock);
- return 0;
-}
-
-static int
-wdt_set_heartbeat(int t)
-{
- if ((t < 1) || (t > 255))
- return -EINVAL;
-
- timeout = t;
- return 0;
-}
-
-static ssize_t
-wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- wdt_ping();
- }
- return count;
-}
-
-static int
-wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_timeout;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "W83697HF WDT",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- wdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (wdt_set_heartbeat(new_timeout))
- return -EINVAL;
- wdt_ping();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wdt_enable();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int
-wdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
- /*
- * Activate
- */
-
- wdt_enable();
- return nonseekable_open(inode, file);
-}
-
-static int
-wdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wdt_disable();
- } else {
- printk (KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- wdt_ping();
- }
- expect_close = 0;
- clear_bit(0, &wdt_is_open);
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int
-wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
- wdt_disable();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdt_write,
- .ioctl = wdt_ioctl,
- .open = wdt_open,
- .release = wdt_close,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier = {
- .notifier_call = wdt_notify_sys,
-};
-
-static int
-w83697hf_check_wdt(void)
-{
- if (!request_region(wdt_io, 2, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%x already in use\n", wdt_io);
- return -EIO;
- }
-
- printk (KERN_DEBUG PFX "Looking for watchdog at address 0x%x\n", wdt_io);
- w83697hf_unlock();
- if (w83697hf_get_reg(0x20) == 0x60) {
- printk (KERN_INFO PFX "watchdog found at address 0x%x\n", wdt_io);
- w83697hf_lock();
- return 0;
- }
- w83697hf_lock(); /* Reprotect in case it was a compatible device */
-
- printk (KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io);
- release_region(wdt_io, 2);
- return -EIO;
-}
-
-static int w83697hf_ioports[] = { 0x2e, 0x4e, 0x00 };
-
-static int __init
-wdt_init(void)
-{
- int ret, i, found = 0;
-
- spin_lock_init(&io_lock);
-
- printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
-
- if (wdt_io == 0) {
- /* we will autodetect the W83697HF/HG watchdog */
- for (i = 0; ((!found) && (w83697hf_ioports[i] != 0)); i++) {
- wdt_io = w83697hf_ioports[i];
- if (!w83697hf_check_wdt())
- found++;
- }
- } else {
- if (!w83697hf_check_wdt())
- found++;
- }
-
- if (!found) {
- printk (KERN_ERR PFX "No W83697HF/HG could be found\n");
- ret = -EIO;
- goto out;
- }
-
- w83697hf_init();
- wdt_disable(); /* Disable watchdog until first use */
-
- if (wdt_set_heartbeat(timeout)) {
- wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
- WATCHDOG_TIMEOUT);
- }
-
- ret = register_reboot_notifier(&wdt_notifier);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto unreg_regions;
- }
-
- ret = misc_register(&wdt_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto unreg_reboot;
- }
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
-out:
- return ret;
-unreg_reboot:
- unregister_reboot_notifier(&wdt_notifier);
-unreg_regions:
- release_region(wdt_io, 2);
- goto out;
-}
-
-static void __exit
-wdt_exit(void)
-{
- misc_deregister(&wdt_miscdev);
- unregister_reboot_notifier(&wdt_notifier);
- release_region(wdt_io, 2);
-}
-
-module_init(wdt_init);
-module_exit(wdt_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Marcus Junker <junker@anduras.de>, Samuel Tardieu <sam@rfc1149.net>");
-MODULE_DESCRIPTION("w83697hf/hg WDT driver");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * W83877F Computer Watchdog Timer driver
- *
- * Based on acquirewdt.c by Alan Cox,
- * and sbc60xxwdt.c by Jakob Oestergaard <jakob@unthought.net>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * The authors do NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
- *
- * (c) Copyright 2001 Scott Jennings <linuxdrivers@oro.net>
- *
- * 4/19 - 2001 [Initial revision]
- * 9/27 - 2001 Added spinlocking
- * 4/12 - 2002 [rob@osinvestor.com] Eliminate extra comments
- * Eliminate fop_read
- * Eliminate extra spin_unlock
- * Added KERN_* tags to printks
- * add CONFIG_WATCHDOG_NOWAYOUT support
- * fix possible wdt_is_open race
- * changed watchdog_info to correctly reflect what the driver offers
- * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
- * WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
- * 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
- * added extra printk's for startup problems
- * use module_param
- * made timeout (the emulated heartbeat) a module_param
- * made the keepalive ping an internal subroutine
- *
- * This WDT driver is different from most other Linux WDT
- * drivers in that the driver will ping the watchdog by itself,
- * because this particular WDT has a very short timeout (1.6
- * seconds) and it would be insane to count on any userspace
- * daemon always getting scheduled within that time frame.
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/timer.h>
-#include <linux/jiffies.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define OUR_NAME "w83877f_wdt"
-#define PFX OUR_NAME ": "
-
-#define ENABLE_W83877F_PORT 0x3F0
-#define ENABLE_W83877F 0x87
-#define DISABLE_W83877F 0xAA
-#define WDT_PING 0x443
-#define WDT_REGISTER 0x14
-#define WDT_ENABLE 0x9C
-#define WDT_DISABLE 0x8C
-
-/*
- * The W83877F seems to be fixed at 1.6s timeout (at least on the
- * EMACS PC-104 board I'm using). If we reset the watchdog every
- * ~250ms we should be safe. */
-
-#define WDT_INTERVAL (HZ/4+1)
-
-/*
- * We must not require too good response from the userspace daemon.
- * Here we require the userspace daemon to send us a heartbeat
- * char to /dev/watchdog every 30 seconds.
- */
-
-#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void wdt_timer_ping(unsigned long);
-static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
-static unsigned long next_heartbeat;
-static unsigned long wdt_is_open;
-static char wdt_expect_close;
-static spinlock_t wdt_spinlock;
-
-/*
- * Whack the dog
- */
-
-static void wdt_timer_ping(unsigned long data)
-{
- /* If we got a heartbeat pulse within the WDT_US_INTERVAL
- * we agree to ping the WDT
- */
- if(time_before(jiffies, next_heartbeat))
- {
- /* Ping the WDT */
- spin_lock(&wdt_spinlock);
-
- /* Ping the WDT by reading from WDT_PING */
- inb_p(WDT_PING);
-
- /* Re-set the timer interval */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-
- spin_unlock(&wdt_spinlock);
-
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
-}
-
-/*
- * Utility routines
- */
-
-static void wdt_change(int writeval)
-{
- unsigned long flags;
- spin_lock_irqsave(&wdt_spinlock, flags);
-
- /* buy some time */
- inb_p(WDT_PING);
-
- /* make W83877F available */
- outb_p(ENABLE_W83877F, ENABLE_W83877F_PORT);
- outb_p(ENABLE_W83877F, ENABLE_W83877F_PORT);
-
- /* enable watchdog */
- outb_p(WDT_REGISTER, ENABLE_W83877F_PORT);
- outb_p(writeval, ENABLE_W83877F_PORT+1);
-
- /* lock the W8387FF away */
- outb_p(DISABLE_W83877F, ENABLE_W83877F_PORT);
-
- spin_unlock_irqrestore(&wdt_spinlock, flags);
-}
-
-static void wdt_startup(void)
-{
- next_heartbeat = jiffies + (timeout * HZ);
-
- /* Start the timer */
- mod_timer(&timer, jiffies + WDT_INTERVAL);
-
- wdt_change(WDT_ENABLE);
-
- printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
-}
-
-static void wdt_turnoff(void)
-{
- /* Stop the timer */
- del_timer(&timer);
-
- wdt_change(WDT_DISABLE);
-
- printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
-}
-
-static void wdt_keepalive(void)
-{
- /* user land ping */
- next_heartbeat = jiffies + (timeout * HZ);
-}
-
-/*
- * /dev/watchdog handling
- */
-
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
- size_t ofs;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- wdt_expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
- char c;
- if (get_user(c, buf + ofs))
- return -EFAULT;
- if (c == 'V')
- wdt_expect_close = 42;
- }
- }
-
- /* someone wrote to us, we should restart timer */
- wdt_keepalive();
- }
- return count;
-}
-
-static int fop_open(struct inode * inode, struct file * file)
-{
- /* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
-
- /* Good, fire up the show */
- wdt_startup();
- return nonseekable_open(inode, file);
-}
-
-static int fop_close(struct inode * inode, struct file * file)
-{
- if(wdt_expect_close == 42)
- wdt_turnoff();
- else {
- del_timer(&timer);
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
- }
- clear_bit(0, &wdt_is_open);
- wdt_expect_close = 0;
- return 0;
-}
-
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident=
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "W83877F",
- };
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
-
- return retval;
- }
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
- }
-}
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = fop_write,
- .open = fop_open,
- .release = fop_close,
- .ioctl = fop_ioctl,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-/*
- * Notifier for system down
- */
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT)
- wdt_turnoff();
- return NOTIFY_DONE;
-}
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier=
-{
- .notifier_call = wdt_notify_sys,
-};
-
-static void __exit w83877f_wdt_unload(void)
-{
- wdt_turnoff();
-
- /* Deregister */
- misc_deregister(&wdt_miscdev);
-
- unregister_reboot_notifier(&wdt_notifier);
- release_region(WDT_PING,1);
- release_region(ENABLE_W83877F_PORT,2);
-}
-
-static int __init w83877f_wdt_init(void)
-{
- int rc = -EBUSY;
-
- spin_lock_init(&wdt_spinlock);
-
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
- timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
- }
-
- if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT"))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- ENABLE_W83877F_PORT);
- rc = -EIO;
- goto err_out;
- }
-
- if (!request_region(WDT_PING, 1, "W8387FF WDT"))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- WDT_PING);
- rc = -EIO;
- goto err_out_region1;
- }
-
- rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
- goto err_out_region2;
- }
-
- rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
- }
-
- printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
- return 0;
-
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
-err_out_region2:
- release_region(WDT_PING,1);
-err_out_region1:
- release_region(ENABLE_W83877F_PORT,2);
-err_out:
- return rc;
-}
-
-module_init(w83877f_wdt_init);
-module_exit(w83877f_wdt_unload);
-
-MODULE_AUTHOR("Scott and Bill Jennings");
-MODULE_DESCRIPTION("Driver for watchdog timer in w83877f chip");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * W83977F Watchdog Timer Driver for Winbond W83977F I/O Chip
- *
- * (c) Copyright 2005 Jose Goncalves <jose.goncalves@inov.pt>
- *
- * Based on w83877f_wdt.c by Scott Jennings,
- * and wdt977.c by Woody Suwalski
- *
- * -----------------------
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#define WATCHDOG_VERSION "1.00"
-#define WATCHDOG_NAME "W83977F WDT"
-#define PFX WATCHDOG_NAME ": "
-#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
-
-#define IO_INDEX_PORT 0x3F0
-#define IO_DATA_PORT (IO_INDEX_PORT+1)
-
-#define UNLOCK_DATA 0x87
-#define LOCK_DATA 0xAA
-#define DEVICE_REGISTER 0x07
-
-#define DEFAULT_TIMEOUT 45 /* default timeout in seconds */
-
-static int timeout = DEFAULT_TIMEOUT;
-static int timeoutW; /* timeout in watchdog counter units */
-static unsigned long timer_alive;
-static int testmode;
-static char expect_close;
-static spinlock_t spinlock;
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (15..7635), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
-module_param(testmode, int, 0);
-MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Start the watchdog
- */
-
-static int wdt_start(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
-
- /*
- * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
- * F2 has the timeout in watchdog counter units.
- * F3 is set to enable watchdog LED blink at timeout.
- * F4 is used to just clear the TIMEOUT'ed state (bit 0).
- */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
-
- /* Set device Aux2 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
-
- /*
- * Select device Aux1 (dev=7) to set GP16 as the watchdog output
- * (in reg E6) and GP13 as the watchdog LED output (in reg E3).
- * Map GP16 at pin 119.
- * In test mode watch the bit 0 on F4 to indicate "triggered" or
- * check watchdog LED on SBC.
- */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
- unsigned pin_map;
-
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x0A,IO_DATA_PORT);
- outb_p(0x2C,IO_INDEX_PORT);
- pin_map = inb_p(IO_DATA_PORT);
- pin_map |= 0x10;
- pin_map &= ~(0x20);
- outb_p(0x2C,IO_INDEX_PORT);
- outb_p(pin_map,IO_DATA_PORT);
- }
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
-
- /* Set device Aux1 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
-
- /* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
-
- printk(KERN_INFO PFX "activated.\n");
-
- return 0;
-}
-
-/*
- * Stop the watchdog
- */
-
-static int wdt_stop(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
-
- /*
- * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
- * F2 is reset to its default value (watchdog timer disabled).
- * F3 is reset to its default state.
- * F4 clears the TIMEOUT'ed state (bit 0) - back to default.
- */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0xFF,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
-
- /*
- * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
- * Gp13 (in reg E3) as inputs.
- */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
- }
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
-
- /* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
-
- printk(KERN_INFO PFX "shutdown.\n");
-
- return 0;
-}
-
-/*
- * Send a keepalive ping to the watchdog
- * This is done by simply re-writing the timeout to reg. 0xF2
- */
-
-static int wdt_keepalive(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
-
- /* Select device Aux2 (device=8) to kick watchdog reg F2 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
-
- /* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
-
- return 0;
-}
-
-/*
- * Set the watchdog timeout value
- */
-
-static int wdt_set_timeout(int t)
-{
- int tmrval;
-
- /*
- * Convert seconds to watchdog counter time units, rounding up.
- * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
- * value. This information is supplied in the PCM-5335 manual and was
- * checked by me on a real board. This is a bit strange because W83977f
- * datasheet says counter unit is in minutes!
- */
- if (t < 15)
- return -EINVAL;
-
- tmrval = ((t + 15) + 29) / 30;
-
- if (tmrval > 255)
- return -EINVAL;
-
- /*
- * timeout is the timeout in seconds,
- * timeoutW is the timeout in watchdog counter units.
- */
- timeoutW = tmrval;
- timeout = (timeoutW * 30) - 15;
- return 0;
-}
-
-/*
- * Get the watchdog status
- */
-
-static int wdt_get_status(int *status)
-{
- int new_status;
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
-
- /* Select device Aux2 (device=8) to read watchdog reg F4 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- new_status = inb_p(IO_DATA_PORT);
-
- /* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
-
- *status = 0;
- if (new_status & 1)
- *status |= WDIOF_CARDRESET;
-
- return 0;
-}
-
-
-/*
- * /dev/watchdog handling
- */
-
-static int wdt_open(struct inode *inode, struct file *file)
-{
- /* If the watchdog is alive we don't need to start it again */
- if( test_and_set_bit(0, &timer_alive) )
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- wdt_start();
- return nonseekable_open(inode, file);
-}
-
-static int wdt_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
- if (expect_close == 42)
- {
- wdt_stop();
- clear_bit(0, &timer_alive);
- } else {
- wdt_keepalive();
- printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
- }
- expect_close = 0;
- return 0;
-}
-
-/*
- * wdt_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t wdt_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
- size_t ofs;
-
- /* note: just in case someone wrote the magic character long ago */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
- char c;
- if (get_user(c, buf + ofs))
- return -EFAULT;
- if (c == 'V') {
- expect_close = 42;
- }
- }
- }
-
- /* someone wrote to us, we should restart timer */
- wdt_keepalive();
- }
- return count;
-}
-
-/*
- * wdt_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features.
- */
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = WATCHDOG_NAME,
-};
-
-static int wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int status;
- int new_options, retval = -EINVAL;
- int new_timeout;
- union {
- struct watchdog_info __user *ident;
- int __user *i;
- } uarg;
-
- uarg.i = (int __user *)arg;
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident, sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- wdt_get_status(&status);
- return put_user(status, uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- if (get_user (new_options, uarg.i))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- wdt_stop();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- wdt_start();
- retval = 0;
- }
-
- return retval;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- if (wdt_set_timeout(new_timeout))
- return -EINVAL;
-
- wdt_keepalive();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, uarg.i);
-
- }
-}
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT)
- wdt_stop();
- return NOTIFY_DONE;
-}
-
-static const struct file_operations wdt_fops=
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdt_write,
- .ioctl = wdt_ioctl,
- .open = wdt_open,
- .release = wdt_release,
-};
-
-static struct miscdevice wdt_miscdev=
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-static struct notifier_block wdt_notifier = {
- .notifier_call = wdt_notify_sys,
-};
-
-static int __init w83977f_wdt_init(void)
-{
- int rc;
-
- printk(KERN_INFO PFX DRIVER_VERSION);
-
- spin_lock_init(&spinlock);
-
- /*
- * Check that the timeout value is within it's range ;
- * if not reset to the default
- */
- if (wdt_set_timeout(timeout)) {
- wdt_set_timeout(DEFAULT_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 15<=timeout<=7635, using %d\n",
- DEFAULT_TIMEOUT);
- }
-
- if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- IO_INDEX_PORT);
- rc = -EIO;
- goto err_out;
- }
-
- rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
- goto err_out_region;
- }
-
- rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
- }
-
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
- timeout, nowayout, testmode);
-
- return 0;
-
-err_out_miscdev:
- misc_deregister(&wdt_miscdev);
-err_out_region:
- release_region(IO_INDEX_PORT,2);
-err_out:
- return rc;
-}
-
-static void __exit w83977f_wdt_exit(void)
-{
- wdt_stop();
- misc_deregister(&wdt_miscdev);
- unregister_reboot_notifier(&wdt_notifier);
- release_region(IO_INDEX_PORT,2);
-}
-
-module_init(w83977f_wdt_init);
-module_exit(w83977f_wdt_exit);
-
-MODULE_AUTHOR("Jose Goncalves <jose.goncalves@inov.pt>");
-MODULE_DESCRIPTION("Driver for watchdog timer in W83977F I/O chip");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * ICP Wafer 5823 Single Board Computer WDT driver
- * http://www.icpamerica.com/wafer_5823.php
- * May also work on other similar models
- *
- * (c) Copyright 2002 Justin Cormack <justin@street-vision.com>
- *
- * Release 0.02
- *
- * Based on advantechwdt.c which is based on wdt.c.
- * Original copyright messages:
- *
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#define WATCHDOG_NAME "Wafer 5823 WDT"
-#define PFX WATCHDOG_NAME ": "
-#define WD_TIMO 60 /* 60 sec default timeout */
-
-static unsigned long wafwdt_is_open;
-static char expect_close;
-static spinlock_t wafwdt_lock;
-
-/*
- * You must set these - there is no sane way to probe for this board.
- *
- * To enable, write the timeout value in seconds (1 to 255) to I/O
- * port WDT_START, then read the port to start the watchdog. To pat
- * the dog, read port WDT_STOP to stop the timer, then read WDT_START
- * to restart it again.
- */
-
-static int wdt_stop = 0x843;
-static int wdt_start = 0x443;
-
-static int timeout = WD_TIMO; /* in seconds */
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) ".");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-static void wafwdt_ping(void)
-{
- /* pat watchdog */
- spin_lock(&wafwdt_lock);
- inb_p(wdt_stop);
- inb_p(wdt_start);
- spin_unlock(&wafwdt_lock);
-}
-
-static void wafwdt_start(void)
-{
- /* start up watchdog */
- outb_p(timeout, wdt_start);
- inb_p(wdt_start);
-}
-
-static void
-wafwdt_stop(void)
-{
- /* stop watchdog */
- inb_p(wdt_stop);
-}
-
-static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
-{
- /* See if we got the magic character 'V' and reload the timer */
- if (count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- /* Well, anyhow someone wrote to us, we should return that favour */
- wafwdt_ping();
- }
- return count;
-}
-
-static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int new_timeout;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
- .firmware_version = 1,
- .identity = "Wafer 5823 WDT",
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof (ident)))
- return -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- wafwdt_ping();
- break;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if ((new_timeout < 1) || (new_timeout > 255))
- return -EINVAL;
- timeout = new_timeout;
- wafwdt_stop();
- wafwdt_start();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wafwdt_start();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wafwdt_stop();
- retval = 0;
- }
-
- return retval;
- }
-
- default:
- return -ENOTTY;
- }
- return 0;
-}
-
-static int wafwdt_open(struct inode *inode, struct file *file)
-{
- if (test_and_set_bit(0, &wafwdt_is_open))
- return -EBUSY;
-
- /*
- * Activate
- */
- wafwdt_start();
- return nonseekable_open(inode, file);
-}
-
-static int
-wafwdt_close(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wafwdt_stop();
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
- wafwdt_ping();
- }
- clear_bit(0, &wafwdt_is_open);
- expect_close = 0;
- return 0;
-}
-
-/*
- * Notifier for system down
- */
-
-static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
-{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
- wafwdt_stop();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-static const struct file_operations wafwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wafwdt_write,
- .ioctl = wafwdt_ioctl,
- .open = wafwdt_open,
- .release = wafwdt_close,
-};
-
-static struct miscdevice wafwdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wafwdt_fops,
-};
-
-/*
- * The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wafwdt_notifier = {
- .notifier_call = wafwdt_notify_sys,
-};
-
-static int __init wafwdt_init(void)
-{
- int ret;
-
- printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n");
-
- spin_lock_init(&wafwdt_lock);
-
- if (timeout < 1 || timeout > 255) {
- timeout = WD_TIMO;
- printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n",
- timeout);
- }
-
- if (wdt_stop != wdt_start) {
- if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
- ret = -EIO;
- goto error;
- }
- }
-
- if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
- ret = -EIO;
- goto error2;
- }
-
- ret = register_reboot_notifier(&wafwdt_notifier);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto error3;
- }
-
- ret = misc_register(&wafwdt_miscdev);
- if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto error4;
- }
-
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
-
- return ret;
-error4:
- unregister_reboot_notifier(&wafwdt_notifier);
-error3:
- release_region(wdt_start, 1);
-error2:
- if (wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
-error:
- return ret;
-}
-
-static void __exit wafwdt_exit(void)
-{
- misc_deregister(&wafwdt_miscdev);
- unregister_reboot_notifier(&wafwdt_notifier);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop, 1);
- release_region(wdt_start, 1);
-}
-
-module_init(wafwdt_init);
-module_exit(wafwdt_exit);
-
-MODULE_AUTHOR("Justin Cormack");
-MODULE_DESCRIPTION("ICP Wafer 5823 Single Board Computer WDT driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-/* end of wafer5823wdt.c */
+++ /dev/null
-/*
- * Industrial Computer Source WDT500/501 driver
- *
- * (c) Copyright 1995 CymruNET Ltd
- * Innovation Centre
- * Singleton Park
- * Swansea
- * Wales
- * UK
- * SA2 8PP
- *
- * http://www.cymru.net
- *
- * This driver is provided under the GNU General Public License, incorporated
- * herein by reference. The driver is provided without warranty or
- * support.
- *
- * Release 0.04.
- *
- */
-
-
-#define WDT_COUNT0 (io+0)
-#define WDT_COUNT1 (io+1)
-#define WDT_COUNT2 (io+2)
-#define WDT_CR (io+3)
-#define WDT_SR (io+4) /* Start buzzer on PCI write */
-#define WDT_RT (io+5) /* Stop buzzer on PCI write */
-#define WDT_BUZZER (io+6) /* PCI only: rd=disable, wr=enable */
-#define WDT_DC (io+7)
-
-/* The following are only on the PCI card, they're outside of I/O space on
- * the ISA card: */
-#define WDT_CLOCK (io+12) /* COUNT2: rd=16.67MHz, wr=2.0833MHz */
-/* inverted opto isolated reset output: */
-#define WDT_OPTONOTRST (io+13) /* wr=enable, rd=disable */
-/* opto isolated reset output: */
-#define WDT_OPTORST (io+14) /* wr=enable, rd=disable */
-/* programmable outputs: */
-#define WDT_PROGOUT (io+15) /* wr=enable, rd=disable */
-
- /* FAN 501 500 */
-#define WDC_SR_WCCR 1 /* Active low */ /* X X X */
-#define WDC_SR_TGOOD 2 /* X X - */
-#define WDC_SR_ISOI0 4 /* X X X */
-#define WDC_SR_ISII1 8 /* X X X */
-#define WDC_SR_FANGOOD 16 /* X - - */
-#define WDC_SR_PSUOVER 32 /* Active low */ /* X X - */
-#define WDC_SR_PSUUNDR 64 /* Active low */ /* X X - */
-#define WDC_SR_IRQ 128 /* Active low */ /* X X X */
-
+++ /dev/null
-/*
- * FIXME: add wdrtas_get_status and wdrtas_get_boot_status as soon as
- * RTAS calls are available
- */
-
-/*
- * RTAS watchdog driver
- *
- * (C) Copyright IBM Corp. 2005
- * device driver to exploit watchdog RTAS functions
- *
- * Authors : Utz Bacher <utz.bacher@de.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/types.h>
-#include <linux/watchdog.h>
-
-#include <asm/rtas.h>
-#include <asm/uaccess.h>
-
-#define WDRTAS_MAGIC_CHAR 42
-#define WDRTAS_SUPPORTED_MASK (WDIOF_SETTIMEOUT | \
- WDIOF_MAGICCLOSE)
-
-MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
-MODULE_DESCRIPTION("RTAS watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-static int wdrtas_nowayout = 1;
-#else
-static int wdrtas_nowayout = 0;
-#endif
-
-static atomic_t wdrtas_miscdev_open = ATOMIC_INIT(0);
-static char wdrtas_expect_close = 0;
-
-static int wdrtas_interval;
-
-#define WDRTAS_THERMAL_SENSOR 3
-static int wdrtas_token_get_sensor_state;
-#define WDRTAS_SURVEILLANCE_IND 9000
-static int wdrtas_token_set_indicator;
-#define WDRTAS_SP_SPI 28
-static int wdrtas_token_get_sp;
-static int wdrtas_token_event_scan;
-
-#define WDRTAS_DEFAULT_INTERVAL 300
-
-#define WDRTAS_LOGBUFFER_LEN 128
-static char wdrtas_logbuffer[WDRTAS_LOGBUFFER_LEN];
-
-
-/*** watchdog access functions */
-
-/**
- * wdrtas_set_interval - sets the watchdog interval
- * @interval: new interval
- *
- * returns 0 on success, <0 on failures
- *
- * wdrtas_set_interval sets the watchdog keepalive interval by calling the
- * RTAS function set-indicator (surveillance). The unit of interval is
- * seconds.
- */
-static int
-wdrtas_set_interval(int interval)
-{
- long result;
- static int print_msg = 10;
-
- /* rtas uses minutes */
- interval = (interval + 59) / 60;
-
- result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL,
- WDRTAS_SURVEILLANCE_IND, 0, interval);
- if ( (result < 0) && (print_msg) ) {
- printk(KERN_ERR "wdrtas: setting the watchdog to %i "
- "timeout failed: %li\n", interval, result);
- print_msg--;
- }
-
- return result;
-}
-
-/**
- * wdrtas_get_interval - returns the current watchdog interval
- * @fallback_value: value (in seconds) to use, if the RTAS call fails
- *
- * returns the interval
- *
- * wdrtas_get_interval returns the current watchdog keepalive interval
- * as reported by the RTAS function ibm,get-system-parameter. The unit
- * of the return value is seconds.
- */
-static int
-wdrtas_get_interval(int fallback_value)
-{
- long result;
- char value[4];
-
- result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL,
- WDRTAS_SP_SPI, (void *)__pa(&value), 4);
- if ( (value[0] != 0) || (value[1] != 2) || (value[3] != 0) ||
- (result < 0) ) {
- printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog "
- "timeout (%li). Continuing\n", result);
- return fallback_value;
- }
-
- /* rtas uses minutes */
- return ((int)value[2]) * 60;
-}
-
-/**
- * wdrtas_timer_start - starts watchdog
- *
- * wdrtas_timer_start starts the watchdog by calling the RTAS function
- * set-interval (surveillance)
- */
-static void
-wdrtas_timer_start(void)
-{
- wdrtas_set_interval(wdrtas_interval);
-}
-
-/**
- * wdrtas_timer_stop - stops watchdog
- *
- * wdrtas_timer_stop stops the watchdog timer by calling the RTAS function
- * set-interval (surveillance)
- */
-static void
-wdrtas_timer_stop(void)
-{
- wdrtas_set_interval(0);
-}
-
-/**
- * wdrtas_log_scanned_event - logs an event we received during keepalive
- *
- * wdrtas_log_scanned_event prints a message to the log buffer dumping
- * the results of the last event-scan call
- */
-static void
-wdrtas_log_scanned_event(void)
-{
- int i;
-
- for (i = 0; i < WDRTAS_LOGBUFFER_LEN; i += 16)
- printk(KERN_INFO "wdrtas: dumping event (line %i/%i), data = "
- "%02x %02x %02x %02x %02x %02x %02x %02x "
- "%02x %02x %02x %02x %02x %02x %02x %02x\n",
- (i / 16) + 1, (WDRTAS_LOGBUFFER_LEN / 16),
- wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1],
- wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3],
- wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5],
- wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7],
- wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9],
- wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11],
- wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13],
- wdrtas_logbuffer[i + 14], wdrtas_logbuffer[i + 15]);
-}
-
-/**
- * wdrtas_timer_keepalive - resets watchdog timer to keep system alive
- *
- * wdrtas_timer_keepalive restarts the watchdog timer by calling the
- * RTAS function event-scan and repeats these calls as long as there are
- * events available. All events will be dumped.
- */
-static void
-wdrtas_timer_keepalive(void)
-{
- long result;
-
- do {
- result = rtas_call(wdrtas_token_event_scan, 4, 1, NULL,
- RTAS_EVENT_SCAN_ALL_EVENTS, 0,
- (void *)__pa(wdrtas_logbuffer),
- WDRTAS_LOGBUFFER_LEN);
- if (result < 0)
- printk(KERN_ERR "wdrtas: event-scan failed: %li\n",
- result);
- if (result == 0)
- wdrtas_log_scanned_event();
- } while (result == 0);
-}
-
-/**
- * wdrtas_get_temperature - returns current temperature
- *
- * returns temperature or <0 on failures
- *
- * wdrtas_get_temperature returns the current temperature in Fahrenheit. It
- * uses the RTAS call get-sensor-state, token 3 to do so
- */
-static int
-wdrtas_get_temperature(void)
-{
- long result;
- int temperature = 0;
-
- result = rtas_call(wdrtas_token_get_sensor_state, 2, 2,
- (void *)__pa(&temperature),
- WDRTAS_THERMAL_SENSOR, 0);
-
- if (result < 0)
- printk(KERN_WARNING "wdrtas: reading the thermal sensor "
- "faild: %li\n", result);
- else
- temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */
-
- return temperature;
-}
-
-/**
- * wdrtas_get_status - returns the status of the watchdog
- *
- * returns a bitmask of defines WDIOF_... as defined in
- * include/linux/watchdog.h
- */
-static int
-wdrtas_get_status(void)
-{
- return 0; /* TODO */
-}
-
-/**
- * wdrtas_get_boot_status - returns the reason for the last boot
- *
- * returns a bitmask of defines WDIOF_... as defined in
- * include/linux/watchdog.h, indicating why the watchdog rebooted the system
- */
-static int
-wdrtas_get_boot_status(void)
-{
- return 0; /* TODO */
-}
-
-/*** watchdog API and operations stuff */
-
-/* wdrtas_write - called when watchdog device is written to
- * @file: file structure
- * @buf: user buffer with data
- * @len: amount to data written
- * @ppos: position in file
- *
- * returns the number of successfully processed characters, which is always
- * the number of bytes passed to this function
- *
- * wdrtas_write processes all the data given to it and looks for the magic
- * character 'V'. This character allows the watchdog device to be closed
- * properly.
- */
-static ssize_t
-wdrtas_write(struct file *file, const char __user *buf,
- size_t len, loff_t *ppos)
-{
- int i;
- char c;
-
- if (!len)
- goto out;
-
- if (!wdrtas_nowayout) {
- wdrtas_expect_close = 0;
- /* look for 'V' */
- for (i = 0; i < len; i++) {
- if (get_user(c, buf + i))
- return -EFAULT;
- /* allow to close device */
- if (c == 'V')
- wdrtas_expect_close = WDRTAS_MAGIC_CHAR;
- }
- }
-
- wdrtas_timer_keepalive();
-
-out:
- return len;
-}
-
-/**
- * wdrtas_ioctl - ioctl function for the watchdog device
- * @inode: inode structure
- * @file: file structure
- * @cmd: command for ioctl
- * @arg: argument pointer
- *
- * returns 0 on success, <0 on failure
- *
- * wdrtas_ioctl implements the watchdog API ioctls
- */
-static int
-wdrtas_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int __user *argp = (void __user *)arg;
- int i;
- static struct watchdog_info wdinfo = {
- .options = WDRTAS_SUPPORTED_MASK,
- .firmware_version = 0,
- .identity = "wdrtas"
- };
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &wdinfo, sizeof(wdinfo)))
- return -EFAULT;
- return 0;
-
- case WDIOC_GETSTATUS:
- i = wdrtas_get_status();
- return put_user(i, argp);
-
- case WDIOC_GETBOOTSTATUS:
- i = wdrtas_get_boot_status();
- return put_user(i, argp);
-
- case WDIOC_GETTEMP:
- if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE)
- return -EOPNOTSUPP;
-
- i = wdrtas_get_temperature();
- return put_user(i, argp);
-
- case WDIOC_SETOPTIONS:
- if (get_user(i, argp))
- return -EFAULT;
- if (i & WDIOS_DISABLECARD)
- wdrtas_timer_stop();
- if (i & WDIOS_ENABLECARD) {
- wdrtas_timer_keepalive();
- wdrtas_timer_start();
- }
- if (i & WDIOS_TEMPPANIC) {
- /* not implemented. Done by H8 */
- }
- return 0;
-
- case WDIOC_KEEPALIVE:
- wdrtas_timer_keepalive();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(i, argp))
- return -EFAULT;
-
- if (wdrtas_set_interval(i))
- return -EINVAL;
-
- wdrtas_timer_keepalive();
-
- if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE)
- wdrtas_interval = i;
- else
- wdrtas_interval = wdrtas_get_interval(i);
- /* fallthrough */
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdrtas_interval, argp);
-
- default:
- return -ENOTTY;
- }
-}
-
-/**
- * wdrtas_open - open function of watchdog device
- * @inode: inode structure
- * @file: file structure
- *
- * returns 0 on success, -EBUSY if the file has been opened already, <0 on
- * other failures
- *
- * function called when watchdog device is opened
- */
-static int
-wdrtas_open(struct inode *inode, struct file *file)
-{
- /* only open once */
- if (atomic_inc_return(&wdrtas_miscdev_open) > 1) {
- atomic_dec(&wdrtas_miscdev_open);
- return -EBUSY;
- }
-
- wdrtas_timer_start();
- wdrtas_timer_keepalive();
-
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdrtas_close - close function of watchdog device
- * @inode: inode structure
- * @file: file structure
- *
- * returns 0 on success
- *
- * close function. Always succeeds
- */
-static int
-wdrtas_close(struct inode *inode, struct file *file)
-{
- /* only stop watchdog, if this was announced using 'V' before */
- if (wdrtas_expect_close == WDRTAS_MAGIC_CHAR)
- wdrtas_timer_stop();
- else {
- printk(KERN_WARNING "wdrtas: got unexpected close. Watchdog "
- "not stopped.\n");
- wdrtas_timer_keepalive();
- }
-
- wdrtas_expect_close = 0;
- atomic_dec(&wdrtas_miscdev_open);
- return 0;
-}
-
-/**
- * wdrtas_temp_read - gives back the temperature in fahrenheit
- * @file: file structure
- * @buf: user buffer
- * @count: number of bytes to be read
- * @ppos: position in file
- *
- * returns always 1 or -EFAULT in case of user space copy failures, <0 on
- * other failures
- *
- * wdrtas_temp_read gives the temperature to the users by copying this
- * value as one byte into the user space buffer. The unit is Fahrenheit...
- */
-static ssize_t
-wdrtas_temp_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- int temperature = 0;
-
- temperature = wdrtas_get_temperature();
- if (temperature < 0)
- return temperature;
-
- if (copy_to_user(buf, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-/**
- * wdrtas_temp_open - open function of temperature device
- * @inode: inode structure
- * @file: file structure
- *
- * returns 0 on success, <0 on failure
- *
- * function called when temperature device is opened
- */
-static int
-wdrtas_temp_open(struct inode *inode, struct file *file)
-{
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdrtas_temp_close - close function of temperature device
- * @inode: inode structure
- * @file: file structure
- *
- * returns 0 on success
- *
- * close function. Always succeeds
- */
-static int
-wdrtas_temp_close(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-/**
- * wdrtas_reboot - reboot notifier function
- * @nb: notifier block structure
- * @code: reboot code
- * @ptr: unused
- *
- * returns NOTIFY_DONE
- *
- * wdrtas_reboot stops the watchdog in case of a reboot
- */
-static int
-wdrtas_reboot(struct notifier_block *this, unsigned long code, void *ptr)
-{
- if ( (code==SYS_DOWN) || (code==SYS_HALT) )
- wdrtas_timer_stop();
-
- return NOTIFY_DONE;
-}
-
-/*** initialization stuff */
-
-static const struct file_operations wdrtas_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdrtas_write,
- .ioctl = wdrtas_ioctl,
- .open = wdrtas_open,
- .release = wdrtas_close,
-};
-
-static struct miscdevice wdrtas_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdrtas_fops,
-};
-
-static const struct file_operations wdrtas_temp_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = wdrtas_temp_read,
- .open = wdrtas_temp_open,
- .release = wdrtas_temp_close,
-};
-
-static struct miscdevice wdrtas_tempdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &wdrtas_temp_fops,
-};
-
-static struct notifier_block wdrtas_notifier = {
- .notifier_call = wdrtas_reboot,
-};
-
-/**
- * wdrtas_get_tokens - reads in RTAS tokens
- *
- * returns 0 on succes, <0 on failure
- *
- * wdrtas_get_tokens reads in the tokens for the RTAS calls used in
- * this watchdog driver. It tolerates, if "get-sensor-state" and
- * "ibm,get-system-parameter" are not available.
- */
-static int
-wdrtas_get_tokens(void)
-{
- wdrtas_token_get_sensor_state = rtas_token("get-sensor-state");
- if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_WARNING "wdrtas: couldn't get token for "
- "get-sensor-state. Trying to continue without "
- "temperature support.\n");
- }
-
- wdrtas_token_get_sp = rtas_token("ibm,get-system-parameter");
- if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_WARNING "wdrtas: couldn't get token for "
- "ibm,get-system-parameter. Trying to continue with "
- "a default timeout value of %i seconds.\n",
- WDRTAS_DEFAULT_INTERVAL);
- }
-
- wdrtas_token_set_indicator = rtas_token("set-indicator");
- if (wdrtas_token_set_indicator == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_ERR "wdrtas: couldn't get token for "
- "set-indicator. Terminating watchdog code.\n");
- return -EIO;
- }
-
- wdrtas_token_event_scan = rtas_token("event-scan");
- if (wdrtas_token_event_scan == RTAS_UNKNOWN_SERVICE) {
- printk(KERN_ERR "wdrtas: couldn't get token for event-scan. "
- "Terminating watchdog code.\n");
- return -EIO;
- }
-
- return 0;
-}
-
-/**
- * wdrtas_unregister_devs - unregisters the misc dev handlers
- *
- * wdrtas_register_devs unregisters the watchdog and temperature watchdog
- * misc devs
- */
-static void
-wdrtas_unregister_devs(void)
-{
- misc_deregister(&wdrtas_miscdev);
- if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE)
- misc_deregister(&wdrtas_tempdev);
-}
-
-/**
- * wdrtas_register_devs - registers the misc dev handlers
- *
- * returns 0 on succes, <0 on failure
- *
- * wdrtas_register_devs registers the watchdog and temperature watchdog
- * misc devs
- */
-static int
-wdrtas_register_devs(void)
-{
- int result;
-
- result = misc_register(&wdrtas_miscdev);
- if (result) {
- printk(KERN_ERR "wdrtas: couldn't register watchdog misc "
- "device. Terminating watchdog code.\n");
- return result;
- }
-
- if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE) {
- result = misc_register(&wdrtas_tempdev);
- if (result) {
- printk(KERN_WARNING "wdrtas: couldn't register "
- "watchdog temperature misc device. Continuing "
- "without temperature support.\n");
- wdrtas_token_get_sensor_state = RTAS_UNKNOWN_SERVICE;
- }
- }
-
- return 0;
-}
-
-/**
- * wdrtas_init - init function of the watchdog driver
- *
- * returns 0 on succes, <0 on failure
- *
- * registers the file handlers and the reboot notifier
- */
-static int __init
-wdrtas_init(void)
-{
- if (wdrtas_get_tokens())
- return -ENODEV;
-
- if (wdrtas_register_devs())
- return -ENODEV;
-
- if (register_reboot_notifier(&wdrtas_notifier)) {
- printk(KERN_ERR "wdrtas: could not register reboot notifier. "
- "Terminating watchdog code.\n");
- wdrtas_unregister_devs();
- return -ENODEV;
- }
-
- if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE)
- wdrtas_interval = WDRTAS_DEFAULT_INTERVAL;
- else
- wdrtas_interval = wdrtas_get_interval(WDRTAS_DEFAULT_INTERVAL);
-
- return 0;
-}
-
-/**
- * wdrtas_exit - exit function of the watchdog driver
- *
- * unregisters the file handlers and the reboot notifier
- */
-static void __exit
-wdrtas_exit(void)
-{
- if (!wdrtas_nowayout)
- wdrtas_timer_stop();
-
- wdrtas_unregister_devs();
-
- unregister_reboot_notifier(&wdrtas_notifier);
-}
-
-module_init(wdrtas_init);
-module_exit(wdrtas_exit);
+++ /dev/null
-/*
- * Industrial Computer Source WDT500/501 driver
- *
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Release 0.10.
- *
- * Fixes
- * Dave Gregorich : Modularisation and minor bugs
- * Alan Cox : Added the watchdog ioctl() stuff
- * Alan Cox : Fixed the reboot problem (as noted by
- * Matt Crocker).
- * Alan Cox : Added wdt= boot option
- * Alan Cox : Cleaned up copy/user stuff
- * Tim Hockin : Added insmod parameters, comment cleanup
- * Parameterized timeout
- * Tigran Aivazian : Restructured wdt_init() to handle failures
- * Joel Becker : Added WDIOC_GET/SETTIMEOUT
- * Matt Domsch : Added nowayout module option
- */
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/fs.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include "wd501p.h"
-
-static unsigned long wdt_is_open;
-static char expect_close;
-
-/*
- * Module parameters
- */
-
-#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
-
-static int heartbeat = WD_TIMO;
-static int wd_heartbeat;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/* You must set these - there is no sane way to probe for this board. */
-static int io=0x240;
-static int irq=11;
-
-module_param(io, int, 0);
-MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
-module_param(irq, int, 0);
-MODULE_PARM_DESC(irq, "WDT irq (default=11)");
-
-#ifdef CONFIG_WDT_501
-/* Support for the Fan Tachometer on the WDT501-P */
-static int tachometer;
-
-module_param(tachometer, int, 0);
-MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)");
-#endif /* CONFIG_WDT_501 */
-
-/*
- * Programming support
- */
-
-static void wdt_ctr_mode(int ctr, int mode)
-{
- ctr<<=6;
- ctr|=0x30;
- ctr|=(mode<<1);
- outb_p(ctr, WDT_CR);
-}
-
-static void wdt_ctr_load(int ctr, int val)
-{
- outb_p(val&0xFF, WDT_COUNT0+ctr);
- outb_p(val>>8, WDT_COUNT0+ctr);
-}
-
-/**
- * wdt_start:
- *
- * Start the watchdog driver.
- */
-
-static int wdt_start(void)
-{
- inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
- wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
- wdt_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
- wdt_ctr_load(0, 8948); /* Count at 100Hz */
- wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
- wdt_ctr_load(2,65535); /* Length of reset pulse */
- outb_p(0, WDT_DC); /* Enable watchdog */
- return 0;
-}
-
-/**
- * wdt_stop:
- *
- * Stop the watchdog driver.
- */
-
-static int wdt_stop (void)
-{
- /* Turn the card off */
- inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_load(2,0); /* 0 length reset pulses now */
- return 0;
-}
-
-/**
- * wdt_ping:
- *
- * Reload counter one with the watchdog heartbeat. We don't bother reloading
- * the cascade counter.
- */
-
-static int wdt_ping(void)
-{
- /* Write a watchdog value */
- inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
- wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
- outb_p(0, WDT_DC); /* Enable watchdog */
- return 0;
-}
-
-/**
- * wdt_set_heartbeat:
- * @t: the new heartbeat value that needs to be set.
- *
- * Set a new heartbeat value for the watchdog device. If the heartbeat value is
- * incorrect we keep the old value and return -EINVAL. If successfull we
- * return 0.
- */
-static int wdt_set_heartbeat(int t)
-{
- if ((t < 1) || (t > 65535))
- return -EINVAL;
-
- heartbeat = t;
- wd_heartbeat = t * 100;
- return 0;
-}
-
-/**
- * wdt_get_status:
- * @status: the new status.
- *
- * Extract the status information from a WDT watchdog device. There are
- * several board variants so we have to know which bits are valid. Some
- * bits default to one and some to zero in order to be maximally painful.
- *
- * we then map the bits onto the status ioctl flags.
- */
-
-static int wdt_get_status(int *status)
-{
- unsigned char new_status=inb_p(WDT_SR);
-
- *status=0;
- if (new_status & WDC_SR_ISOI0)
- *status |= WDIOF_EXTERN1;
- if (new_status & WDC_SR_ISII1)
- *status |= WDIOF_EXTERN2;
-#ifdef CONFIG_WDT_501
- if (!(new_status & WDC_SR_TGOOD))
- *status |= WDIOF_OVERHEAT;
- if (!(new_status & WDC_SR_PSUOVER))
- *status |= WDIOF_POWEROVER;
- if (!(new_status & WDC_SR_PSUUNDR))
- *status |= WDIOF_POWERUNDER;
- if (tachometer) {
- if (!(new_status & WDC_SR_FANGOOD))
- *status |= WDIOF_FANFAULT;
- }
-#endif /* CONFIG_WDT_501 */
- return 0;
-}
-
-#ifdef CONFIG_WDT_501
-/**
- * wdt_get_temperature:
- *
- * Reports the temperature in degrees Fahrenheit. The API is in
- * farenheit. It was designed by an imperial measurement luddite.
- */
-
-static int wdt_get_temperature(int *temperature)
-{
- unsigned short c=inb_p(WDT_RT);
-
- *temperature = (c * 11 / 15) + 7;
- return 0;
-}
-#endif /* CONFIG_WDT_501 */
-
-/**
- * wdt_interrupt:
- * @irq: Interrupt number
- * @dev_id: Unused as we don't allow multiple devices.
- *
- * Handle an interrupt from the board. These are raised when the status
- * map changes in what the board considers an interesting way. That means
- * a failure condition occurring.
- */
-
-static irqreturn_t wdt_interrupt(int irq, void *dev_id)
-{
- /*
- * Read the status register see what is up and
- * then printk it.
- */
- unsigned char status=inb_p(WDT_SR);
-
- printk(KERN_CRIT "WDT status %d\n", status);
-
-#ifdef CONFIG_WDT_501
- if (!(status & WDC_SR_TGOOD))
- printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
- if (!(status & WDC_SR_PSUOVER))
- printk(KERN_CRIT "PSU over voltage.\n");
- if (!(status & WDC_SR_PSUUNDR))
- printk(KERN_CRIT "PSU under voltage.\n");
- if (tachometer) {
- if (!(status & WDC_SR_FANGOOD))
- printk(KERN_CRIT "Possible fan fault.\n");
- }
-#endif /* CONFIG_WDT_501 */
- if (!(status & WDC_SR_WCCR))
-#ifdef SOFTWARE_REBOOT
-#ifdef ONLY_TESTING
- printk(KERN_CRIT "Would Reboot.\n");
-#else
- printk(KERN_CRIT "Initiating system reboot.\n");
- emergency_restart();
-#endif
-#else
- printk(KERN_CRIT "Reset in 5ms.\n");
-#endif
- return IRQ_HANDLED;
-}
-
-
-/**
- * wdt_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if(count) {
- if (!nowayout) {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- wdt_ping();
- }
- return count;
-}
-
-/**
- * wdt_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features. We only actually usefully support
- * querying capabilities and current status.
- */
-
-static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_heartbeat;
- int status;
-
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT|
- WDIOF_MAGICCLOSE|
- WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = "WDT500/501",
- };
-
- /* Add options according to the card we have */
- ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
-#ifdef CONFIG_WDT_501
- ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
- if (tachometer)
- ident.options |= WDIOF_FANFAULT;
-#endif /* CONFIG_WDT_501 */
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-
- case WDIOC_GETSTATUS:
- wdt_get_status(&status);
- return put_user(status, p);
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- wdt_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
- }
-}
-
-/**
- * wdt_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The watchdog device has been opened. The watchdog device is single
- * open and on opening we load the counters. Counter zero is a 100Hz
- * cascade, into counter 1 which downcounts to reboot. When the counter
- * triggers counter 2 downcounts the length of the reset pulse which
- * set set to be as long as possible.
- */
-
-static int wdt_open(struct inode *inode, struct file *file)
-{
- if(test_and_set_bit(0, &wdt_is_open))
- return -EBUSY;
- /*
- * Activate
- */
- wdt_start();
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdt_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The watchdog has a configurable API. There is a religious dispute
- * between people who want their watchdog to be able to shut down and
- * those who want to be sure if the watchdog manager dies the machine
- * reboots. In the former case we disable the counters, in the latter
- * case you have to open it again very soon.
- */
-
-static int wdt_release(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wdt_stop();
- clear_bit(0, &wdt_is_open);
- } else {
- printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
- wdt_ping();
- }
- expect_close = 0;
- return 0;
-}
-
-#ifdef CONFIG_WDT_501
-/**
- * wdt_temp_read:
- * @file: file handle to the watchdog board
- * @buf: buffer to write 1 byte into
- * @count: length of buffer
- * @ptr: offset (no seek allowed)
- *
- * Temp_read reports the temperature in degrees Fahrenheit. The API is in
- * farenheit. It was designed by an imperial measurement luddite.
- */
-
-static ssize_t wdt_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
-{
- int temperature;
-
- if (wdt_get_temperature(&temperature))
- return -EFAULT;
-
- if (copy_to_user (buf, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-/**
- * wdt_temp_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The temperature device has been opened.
- */
-
-static int wdt_temp_open(struct inode *inode, struct file *file)
-{
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdt_temp_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The temperature device has been closed.
- */
-
-static int wdt_temp_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-#endif /* CONFIG_WDT_501 */
-
-/**
- * notify_sys:
- * @this: our notifier block
- * @code: the event being reported
- * @unused: unused
- *
- * Our notifier is called on system shutdowns. We want to turn the card
- * off at reboot otherwise the machine will reboot again during memory
- * test or worse yet during the following fsck. This would suck, in fact
- * trust me - if it happens it does suck.
- */
-
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the card off */
- wdt_stop();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-
-static const struct file_operations wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdt_write,
- .ioctl = wdt_ioctl,
- .open = wdt_open,
- .release = wdt_release,
-};
-
-static struct miscdevice wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt_fops,
-};
-
-#ifdef CONFIG_WDT_501
-static const struct file_operations wdt_temp_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = wdt_temp_read,
- .open = wdt_temp_open,
- .release = wdt_temp_release,
-};
-
-static struct miscdevice temp_miscdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &wdt_temp_fops,
-};
-#endif /* CONFIG_WDT_501 */
-
-/*
- * The WDT card needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdt_notifier = {
- .notifier_call = wdt_notify_sys,
-};
-
-/**
- * cleanup_module:
- *
- * Unload the watchdog. You cannot do this with any file handles open.
- * If your watchdog is set to continue ticking on close and you unload
- * it, well it keeps ticking. We won't get the interrupt but the board
- * will not touch PC memory so all is fine. You just have to load a new
- * module in 60 seconds or reboot.
- */
-
-static void __exit wdt_exit(void)
-{
- misc_deregister(&wdt_miscdev);
-#ifdef CONFIG_WDT_501
- misc_deregister(&temp_miscdev);
-#endif /* CONFIG_WDT_501 */
- unregister_reboot_notifier(&wdt_notifier);
- free_irq(irq, NULL);
- release_region(io,8);
-}
-
-/**
- * wdt_init:
- *
- * Set up the WDT watchdog board. All we have to do is grab the
- * resources we require and bitch if anyone beat us to them.
- * The open() function will actually kick the board off.
- */
-
-static int __init wdt_init(void)
-{
- int ret;
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (wdt_set_heartbeat(heartbeat)) {
- wdt_set_heartbeat(WD_TIMO);
- printk(KERN_INFO "wdt: heartbeat value must be 0<heartbeat<65536, using %d\n",
- WD_TIMO);
- }
-
- if (!request_region(io, 8, "wdt501p")) {
- printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
- ret = -EBUSY;
- goto out;
- }
-
- ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
- if(ret) {
- printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
- goto outreg;
- }
-
- ret = register_reboot_notifier(&wdt_notifier);
- if(ret) {
- printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
- goto outirq;
- }
-
-#ifdef CONFIG_WDT_501
- ret = misc_register(&temp_miscdev);
- if (ret) {
- printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
- goto outrbt;
- }
-#endif /* CONFIG_WDT_501 */
-
- ret = misc_register(&wdt_miscdev);
- if (ret) {
- printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto outmisc;
- }
-
- ret = 0;
- printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
- io, irq, heartbeat, nowayout);
-#ifdef CONFIG_WDT_501
- printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
-#endif /* CONFIG_WDT_501 */
-
-out:
- return ret;
-
-outmisc:
-#ifdef CONFIG_WDT_501
- misc_deregister(&temp_miscdev);
-outrbt:
-#endif /* CONFIG_WDT_501 */
- unregister_reboot_notifier(&wdt_notifier);
-outirq:
- free_irq(irq, NULL);
-outreg:
- release_region(io,8);
- goto out;
-}
-
-module_init(wdt_init);
-module_exit(wdt_exit);
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_DESCRIPTION("Driver for ISA ICS watchdog cards (WDT500/501)");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Intel 21285 watchdog driver
- * Copyright (c) Phil Blundell <pb@nexus.co.uk>, 1998
- *
- * based on
- *
- * SoftDog 0.05: A Software Watchdog Device
- *
- * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/hardware.h>
-#include <asm/mach-types.h>
-#include <asm/hardware/dec21285.h>
-
-/*
- * Define this to stop the watchdog actually rebooting the machine.
- */
-#undef ONLY_TESTING
-
-static unsigned int soft_margin = 60; /* in seconds */
-static unsigned int reload;
-static unsigned long timer_alive;
-
-#ifdef ONLY_TESTING
-/*
- * If the timer expires..
- */
-static void watchdog_fire(int irq, void *dev_id)
-{
- printk(KERN_CRIT "Watchdog: Would Reboot.\n");
- *CSR_TIMER4_CNTL = 0;
- *CSR_TIMER4_CLR = 0;
-}
-#endif
-
-/*
- * Refresh the timer.
- */
-static void watchdog_ping(void)
-{
- *CSR_TIMER4_LOAD = reload;
-}
-
-/*
- * Allow only one person to hold it open
- */
-static int watchdog_open(struct inode *inode, struct file *file)
-{
- int ret;
-
- if (*CSR_SA110_CNTL & (1 << 13))
- return -EBUSY;
-
- if (test_and_set_bit(1, &timer_alive))
- return -EBUSY;
-
- reload = soft_margin * (mem_fclk_21285 / 256);
-
- *CSR_TIMER4_CLR = 0;
- watchdog_ping();
- *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD
- | TIMER_CNTL_DIV256;
-
-#ifdef ONLY_TESTING
- ret = request_irq(IRQ_TIMER4, watchdog_fire, 0, "watchdog", NULL);
- if (ret) {
- *CSR_TIMER4_CNTL = 0;
- clear_bit(1, &timer_alive);
- }
-#else
- /*
- * Setting this bit is irreversible; once enabled, there is
- * no way to disable the watchdog.
- */
- *CSR_SA110_CNTL |= 1 << 13;
-
- ret = 0;
-#endif
- nonseekable_open(inode, file);
- return ret;
-}
-
-/*
- * Shut off the timer.
- * Note: if we really have enabled the watchdog, there
- * is no way to turn off.
- */
-static int watchdog_release(struct inode *inode, struct file *file)
-{
-#ifdef ONLY_TESTING
- free_irq(IRQ_TIMER4, NULL);
- clear_bit(1, &timer_alive);
-#endif
- return 0;
-}
-
-static ssize_t
-watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
-{
- /*
- * Refresh the timer.
- */
- if (len)
- watchdog_ping();
-
- return len;
-}
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT,
- .identity = "Footbridge Watchdog",
-};
-
-static int
-watchdog_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- unsigned int new_margin;
- int ret = -ENOTTY;
-
- switch(cmd) {
- case WDIOC_GETSUPPORT:
- ret = 0;
- if (copy_to_user((void *)arg, &ident, sizeof(ident)))
- ret = -EFAULT;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0,(int *)arg);
- break;
-
- case WDIOC_KEEPALIVE:
- watchdog_ping();
- ret = 0;
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(new_margin, (int *)arg);
- if (ret)
- break;
-
- /* Arbitrary, can't find the card's limits */
- if (new_margin < 0 || new_margin > 60) {
- ret = -EINVAL;
- break;
- }
-
- soft_margin = new_margin;
- reload = soft_margin * (mem_fclk_21285 / 256);
- watchdog_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- ret = put_user(soft_margin, (int *)arg);
- break;
- }
- return ret;
-}
-
-static const struct file_operations watchdog_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = watchdog_write,
- .ioctl = watchdog_ioctl,
- .open = watchdog_open,
- .release = watchdog_release,
-};
-
-static struct miscdevice watchdog_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &watchdog_fops,
-};
-
-static int __init footbridge_watchdog_init(void)
-{
- int retval;
-
- if (machine_is_netwinder())
- return -ENODEV;
-
- retval = misc_register(&watchdog_miscdev);
- if (retval < 0)
- return retval;
-
- printk("Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
- soft_margin);
-
- if (machine_is_cats())
- printk("Warning: Watchdog reset may not work on this machine.\n");
- return 0;
-}
-
-static void __exit footbridge_watchdog_exit(void)
-{
- misc_deregister(&watchdog_miscdev);
-}
-
-MODULE_AUTHOR("Phil Blundell <pb@nexus.co.uk>");
-MODULE_DESCRIPTION("Footbridge watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-
-module_param(soft_margin, int, 0);
-MODULE_PARM_DESC(soft_margin,"Watchdog timeout in seconds");
-
-module_init(footbridge_watchdog_init);
-module_exit(footbridge_watchdog_exit);
+++ /dev/null
-/*
- * Wdt977 0.04: A Watchdog Device for Netwinder W83977AF chip
- *
- * (c) Copyright 1998 Rebel.com (Woody Suwalski <woody@netwinder.org>)
- *
- * -----------------------
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * -----------------------
- * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
- * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
- * 19-Dec-2001 Woody Suwalski: Netwinder fixes, ioctl interface
- * 06-Jan-2002 Woody Suwalski: For compatibility, convert all timeouts
- * from minutes to seconds.
- * 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
- * nwwatchdog_init.
- * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
- * remove limitiation to be used on Netwinders only
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/fs.h>
-#include <linux/miscdevice.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/watchdog.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/mach-types.h>
-#include <asm/uaccess.h>
-
-#define WATCHDOG_VERSION "0.04"
-#define WATCHDOG_NAME "Wdt977"
-#define PFX WATCHDOG_NAME ": "
-#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
-
-#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
-#define IO_DATA_PORT (IO_INDEX_PORT+1)
-
-#define UNLOCK_DATA 0x87
-#define LOCK_DATA 0xAA
-#define DEVICE_REGISTER 0x07
-
-
-#define DEFAULT_TIMEOUT 60 /* default timeout in seconds */
-
-static int timeout = DEFAULT_TIMEOUT;
-static int timeoutM; /* timeout in minutes */
-static unsigned long timer_alive;
-static int testmode;
-static char expect_close;
-static spinlock_t spinlock;
-
-module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
-module_param(testmode, int, 0);
-MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/*
- * Start the watchdog
- */
-
-static int wdt977_start(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* unlock the SuperIO chip */
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
-
- /* select device Aux2 (device=8) and set watchdog regs F2, F3 and F4
- * F2 has the timeout in minutes
- * F3 could be set to the POWER LED blink (with GP17 set to PowerLed)
- * at timeout, and to reset timer on kbd/mouse activity (not impl.)
- * F4 is used to just clear the TIMEOUT'ed state (bit 0)
- */
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
- outb_p(0xF2, IO_INDEX_PORT);
- outb_p(timeoutM, IO_DATA_PORT);
- outb_p(0xF3, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */
- outb_p(0xF4, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT);
-
- /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
- /* in test mode watch the bit 1 on F4 to indicate "triggered" */
- if (!testmode)
- {
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x07, IO_DATA_PORT);
- outb_p(0xE6, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
- }
-
- /* lock the SuperIO chip */
- outb_p(LOCK_DATA, IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
- printk(KERN_INFO PFX "activated.\n");
-
- return 0;
-}
-
-/*
- * Stop the watchdog
- */
-
-static int wdt977_stop(void)
-{
- unsigned long flags;
- spin_lock_irqsave(&spinlock, flags);
-
- /* unlock the SuperIO chip */
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
-
- /* select device Aux2 (device=8) and set watchdog regs F2,F3 and F4
- * F3 is reset to its default state
- * F4 can clear the TIMEOUT'ed state (bit 0) - back to default
- * We can not use GP17 as a PowerLed, as we use its usage as a RedLed
- */
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
- outb_p(0xF2, IO_INDEX_PORT);
- outb_p(0xFF, IO_DATA_PORT);
- outb_p(0xF3, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT);
- outb_p(0xF4, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT);
- outb_p(0xF2, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT);
-
- /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x07, IO_DATA_PORT);
- outb_p(0xE6, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
-
- /* lock the SuperIO chip */
- outb_p(LOCK_DATA, IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
- printk(KERN_INFO PFX "shutdown.\n");
-
- return 0;
-}
-
-/*
- * Send a keepalive ping to the watchdog
- * This is done by simply re-writing the timeout to reg. 0xF2
- */
-
-static int wdt977_keepalive(void)
-{
- unsigned long flags;
- spin_lock_irqsave(&spinlock, flags);
-
- /* unlock the SuperIO chip */
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
-
- /* select device Aux2 (device=8) and kicks watchdog reg F2 */
- /* F2 has the timeout in minutes */
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
- outb_p(0xF2, IO_INDEX_PORT);
- outb_p(timeoutM, IO_DATA_PORT);
-
- /* lock the SuperIO chip */
- outb_p(LOCK_DATA, IO_INDEX_PORT);
- spin_unlock_irqrestore(&spinlock, flags);
-
- return 0;
-}
-
-/*
- * Set the watchdog timeout value
- */
-
-static int wdt977_set_timeout(int t)
-{
- int tmrval;
-
- /* convert seconds to minutes, rounding up */
- tmrval = (t + 59) / 60;
-
- if (machine_is_netwinder()) {
- /* we have a hw bug somewhere, so each 977 minute is actually only 30sec
- * this limits the max timeout to half of device max of 255 minutes...
- */
- tmrval += tmrval;
- }
-
- if ((tmrval < 1) || (tmrval > 255))
- return -EINVAL;
-
- /* timeout is the timeout in seconds, timeoutM is the timeout in minutes) */
- timeout = t;
- timeoutM = tmrval;
- return 0;
-}
-
-/*
- * Get the watchdog status
- */
-
-static int wdt977_get_status(int *status)
-{
- int new_status;
- unsigned long flags;
-
- spin_lock_irqsave(&spinlock, flags);
-
- /* unlock the SuperIO chip */
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- outb_p(UNLOCK_DATA, IO_INDEX_PORT);
-
- /* select device Aux2 (device=8) and read watchdog reg F4 */
- outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
- outb_p(0x08, IO_DATA_PORT);
- outb_p(0xF4, IO_INDEX_PORT);
- new_status = inb_p(IO_DATA_PORT);
-
- /* lock the SuperIO chip */
- outb_p(LOCK_DATA, IO_INDEX_PORT);
-
- spin_unlock_irqrestore(&spinlock, flags);
-
- *status=0;
- if (new_status & 1)
- *status |= WDIOF_CARDRESET;
-
- return 0;
-}
-
-
-/*
- * /dev/watchdog handling
- */
-
-static int wdt977_open(struct inode *inode, struct file *file)
-{
- /* If the watchdog is alive we don't need to start it again */
- if( test_and_set_bit(0,&timer_alive) )
- return -EBUSY;
-
- if (nowayout)
- __module_get(THIS_MODULE);
-
- wdt977_start();
- return nonseekable_open(inode, file);
-}
-
-static int wdt977_release(struct inode *inode, struct file *file)
-{
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
- if (expect_close == 42)
- {
- wdt977_stop();
- clear_bit(0,&timer_alive);
- } else {
- wdt977_keepalive();
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- }
- expect_close = 0;
- return 0;
-}
-
-
-/*
- * wdt977_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t wdt977_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- if (count)
- {
- if (!nowayout)
- {
- size_t i;
-
- /* In case it was set long ago */
- expect_close = 0;
-
- for (i = 0; i != count; i++)
- {
- char c;
- if (get_user(c, buf + i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
-
- /* someone wrote to us, we should restart timer */
- wdt977_keepalive();
- }
- return count;
-}
-
-/*
- * wdt977_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features.
- */
-
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE |
- WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = WATCHDOG_NAME,
-};
-
-static int wdt977_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- int status;
- int new_options, retval = -EINVAL;
- int new_timeout;
- union {
- struct watchdog_info __user *ident;
- int __user *i;
- } uarg;
-
- uarg.i = (int __user *)arg;
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident,
- sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- wdt977_get_status(&status);
- return put_user(status, uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- wdt977_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- if (get_user (new_options, uarg.i))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- wdt977_stop();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- wdt977_start();
- retval = 0;
- }
-
- return retval;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- if (wdt977_set_timeout(new_timeout))
- return -EINVAL;
-
- wdt977_keepalive();
- /* Fall */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, uarg.i);
-
- }
-}
-
-static int wdt977_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if(code==SYS_DOWN || code==SYS_HALT)
- wdt977_stop();
- return NOTIFY_DONE;
-}
-
-static const struct file_operations wdt977_fops=
-{
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdt977_write,
- .ioctl = wdt977_ioctl,
- .open = wdt977_open,
- .release = wdt977_release,
-};
-
-static struct miscdevice wdt977_miscdev=
-{
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdt977_fops,
-};
-
-static struct notifier_block wdt977_notifier = {
- .notifier_call = wdt977_notify_sys,
-};
-
-static int __init wd977_init(void)
-{
- int rc;
-
- //if (!machine_is_netwinder())
- // return -ENODEV;
-
- printk(KERN_INFO PFX DRIVER_VERSION);
-
- spin_lock_init(&spinlock);
-
- /* Check that the timeout value is within it's range ; if not reset to the default */
- if (wdt977_set_timeout(timeout))
- {
- wdt977_set_timeout(DEFAULT_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n",
- DEFAULT_TIMEOUT);
- }
-
- /* on Netwinder the IOports are already reserved by
- * arch/arm/mach-footbridge/netwinder-hw.c
- */
- if (!machine_is_netwinder())
- {
- if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- IO_INDEX_PORT);
- rc = -EIO;
- goto err_out;
- }
- }
-
- rc = misc_register(&wdt977_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt977_miscdev.minor, rc);
- goto err_out_region;
- }
-
- rc = register_reboot_notifier(&wdt977_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
- goto err_out_miscdev;
- }
-
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
- timeout, nowayout, testmode);
-
- return 0;
-
-err_out_miscdev:
- misc_deregister(&wdt977_miscdev);
-err_out_region:
- if (!machine_is_netwinder())
- release_region(IO_INDEX_PORT,2);
-err_out:
- return rc;
-}
-
-static void __exit wd977_exit(void)
-{
- wdt977_stop();
- misc_deregister(&wdt977_miscdev);
- unregister_reboot_notifier(&wdt977_notifier);
- release_region(IO_INDEX_PORT,2);
-}
-
-module_init(wd977_init);
-module_exit(wd977_exit);
-
-MODULE_AUTHOR("Woody Suwalski <woodys@xandros.com>");
-MODULE_DESCRIPTION("W83977AF Watchdog driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+++ /dev/null
-/*
- * Industrial Computer Source PCI-WDT500/501 driver
- *
- * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
- * http://www.redhat.com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
- * warranty for any of this software. This material is provided
- * "AS-IS" and at no charge.
- *
- * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * Release 0.10.
- *
- * Fixes
- * Dave Gregorich : Modularisation and minor bugs
- * Alan Cox : Added the watchdog ioctl() stuff
- * Alan Cox : Fixed the reboot problem (as noted by
- * Matt Crocker).
- * Alan Cox : Added wdt= boot option
- * Alan Cox : Cleaned up copy/user stuff
- * Tim Hockin : Added insmod parameters, comment cleanup
- * Parameterized timeout
- * JP Nollmann : Added support for PCI wdt501p
- * Alan Cox : Split ISA and PCI cards into two drivers
- * Jeff Garzik : PCI cleanups
- * Tigran Aivazian : Restructured wdtpci_init_one() to handle failures
- * Joel Becker : Added WDIOC_GET/SETTIMEOUT
- * Zwane Mwaikambo : Magic char closing, locking changes, cleanups
- * Matt Domsch : nowayout module option
- */
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/watchdog.h>
-#include <linux/ioport.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/pci.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-
-#define WDT_IS_PCI
-#include "wd501p.h"
-
-#define PFX "wdt_pci: "
-
-/*
- * Until Access I/O gets their application for a PCI vendor ID approved,
- * I don't think that it's appropriate to move these constants into the
- * regular pci_ids.h file. -- JPN 2000/01/18
- */
-
-#ifndef PCI_VENDOR_ID_ACCESSIO
-#define PCI_VENDOR_ID_ACCESSIO 0x494f
-#endif
-#ifndef PCI_DEVICE_ID_WDG_CSM
-#define PCI_DEVICE_ID_WDG_CSM 0x22c0
-#endif
-
-/* We can only use 1 card due to the /dev/watchdog restriction */
-static int dev_count;
-
-static struct semaphore open_sem;
-static spinlock_t wdtpci_lock;
-static char expect_close;
-
-static int io;
-static int irq;
-
-/* Default timeout */
-#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
-
-static int heartbeat = WD_TIMO;
-static int wd_heartbeat;
-module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
-
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-#ifdef CONFIG_WDT_501_PCI
-/* Support for the Fan Tachometer on the PCI-WDT501 */
-static int tachometer;
-
-module_param(tachometer, int, 0);
-MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
-#endif /* CONFIG_WDT_501_PCI */
-
-/*
- * Programming support
- */
-
-static void wdtpci_ctr_mode(int ctr, int mode)
-{
- ctr<<=6;
- ctr|=0x30;
- ctr|=(mode<<1);
- outb_p(ctr, WDT_CR);
-}
-
-static void wdtpci_ctr_load(int ctr, int val)
-{
- outb_p(val&0xFF, WDT_COUNT0+ctr);
- outb_p(val>>8, WDT_COUNT0+ctr);
-}
-
-/**
- * wdtpci_start:
- *
- * Start the watchdog driver.
- */
-
-static int wdtpci_start(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&wdtpci_lock, flags);
-
- /*
- * "pet" the watchdog, as Access says.
- * This resets the clock outputs.
- */
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
- outb_p(0, WDT_DC); /* Enable watchdog */
-
- inb_p(WDT_DC); /* Disable watchdog */
- outb_p(0, WDT_CLOCK); /* 2.0833MHz clock */
- inb_p(WDT_BUZZER); /* disable */
- inb_p(WDT_OPTONOTRST); /* disable */
- inb_p(WDT_OPTORST); /* disable */
- inb_p(WDT_PROGOUT); /* disable */
- wdtpci_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
- wdtpci_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
- wdtpci_ctr_mode(2,1); /* Program CTR2 for Mode 1: Retriggerable One-Shot */
- wdtpci_ctr_load(0,20833); /* count at 100Hz */
- wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
- /* DO NOT LOAD CTR2 on PCI card! -- JPN */
- outb_p(0, WDT_DC); /* Enable watchdog */
-
- spin_unlock_irqrestore(&wdtpci_lock, flags);
- return 0;
-}
-
-/**
- * wdtpci_stop:
- *
- * Stop the watchdog driver.
- */
-
-static int wdtpci_stop (void)
-{
- unsigned long flags;
-
- /* Turn the card off */
- spin_lock_irqsave(&wdtpci_lock, flags);
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_load(2,0); /* 0 length reset pulses now */
- spin_unlock_irqrestore(&wdtpci_lock, flags);
- return 0;
-}
-
-/**
- * wdtpci_ping:
- *
- * Reload counter one with the watchdog heartbeat. We don't bother reloading
- * the cascade counter.
- */
-
-static int wdtpci_ping(void)
-{
- unsigned long flags;
-
- /* Write a watchdog value */
- spin_lock_irqsave(&wdtpci_lock, flags);
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
- wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
- outb_p(0, WDT_DC); /* Enable watchdog */
- spin_unlock_irqrestore(&wdtpci_lock, flags);
- return 0;
-}
-
-/**
- * wdtpci_set_heartbeat:
- * @t: the new heartbeat value that needs to be set.
- *
- * Set a new heartbeat value for the watchdog device. If the heartbeat value is
- * incorrect we keep the old value and return -EINVAL. If successfull we
- * return 0.
- */
-static int wdtpci_set_heartbeat(int t)
-{
- /* Arbitrary, can't find the card's limits */
- if ((t < 1) || (t > 65535))
- return -EINVAL;
-
- heartbeat = t;
- wd_heartbeat = t * 100;
- return 0;
-}
-
-/**
- * wdtpci_get_status:
- * @status: the new status.
- *
- * Extract the status information from a WDT watchdog device. There are
- * several board variants so we have to know which bits are valid. Some
- * bits default to one and some to zero in order to be maximally painful.
- *
- * we then map the bits onto the status ioctl flags.
- */
-
-static int wdtpci_get_status(int *status)
-{
- unsigned char new_status=inb_p(WDT_SR);
-
- *status=0;
- if (new_status & WDC_SR_ISOI0)
- *status |= WDIOF_EXTERN1;
- if (new_status & WDC_SR_ISII1)
- *status |= WDIOF_EXTERN2;
-#ifdef CONFIG_WDT_501_PCI
- if (!(new_status & WDC_SR_TGOOD))
- *status |= WDIOF_OVERHEAT;
- if (!(new_status & WDC_SR_PSUOVER))
- *status |= WDIOF_POWEROVER;
- if (!(new_status & WDC_SR_PSUUNDR))
- *status |= WDIOF_POWERUNDER;
- if (tachometer) {
- if (!(new_status & WDC_SR_FANGOOD))
- *status |= WDIOF_FANFAULT;
- }
-#endif /* CONFIG_WDT_501_PCI */
- return 0;
-}
-
-#ifdef CONFIG_WDT_501_PCI
-/**
- * wdtpci_get_temperature:
- *
- * Reports the temperature in degrees Fahrenheit. The API is in
- * farenheit. It was designed by an imperial measurement luddite.
- */
-
-static int wdtpci_get_temperature(int *temperature)
-{
- unsigned short c=inb_p(WDT_RT);
-
- *temperature = (c * 11 / 15) + 7;
- return 0;
-}
-#endif /* CONFIG_WDT_501_PCI */
-
-/**
- * wdtpci_interrupt:
- * @irq: Interrupt number
- * @dev_id: Unused as we don't allow multiple devices.
- *
- * Handle an interrupt from the board. These are raised when the status
- * map changes in what the board considers an interesting way. That means
- * a failure condition occurring.
- */
-
-static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
-{
- /*
- * Read the status register see what is up and
- * then printk it.
- */
- unsigned char status=inb_p(WDT_SR);
-
- printk(KERN_CRIT PFX "status %d\n", status);
-
-#ifdef CONFIG_WDT_501_PCI
- if (!(status & WDC_SR_TGOOD))
- printk(KERN_CRIT PFX "Overheat alarm.(%d)\n",inb_p(WDT_RT));
- if (!(status & WDC_SR_PSUOVER))
- printk(KERN_CRIT PFX "PSU over voltage.\n");
- if (!(status & WDC_SR_PSUUNDR))
- printk(KERN_CRIT PFX "PSU under voltage.\n");
- if (tachometer) {
- if (!(status & WDC_SR_FANGOOD))
- printk(KERN_CRIT PFX "Possible fan fault.\n");
- }
-#endif /* CONFIG_WDT_501_PCI */
- if (!(status&WDC_SR_WCCR))
-#ifdef SOFTWARE_REBOOT
-#ifdef ONLY_TESTING
- printk(KERN_CRIT PFX "Would Reboot.\n");
-#else
- printk(KERN_CRIT PFX "Initiating system reboot.\n");
- emergency_restart(NULL);
-#endif
-#else
- printk(KERN_CRIT PFX "Reset in 5ms.\n");
-#endif
- return IRQ_HANDLED;
-}
-
-
-/**
- * wdtpci_write:
- * @file: file handle to the watchdog
- * @buf: buffer to write (unused as data does not matter here
- * @count: count of bytes
- * @ppos: pointer to the position to write. No seeks allowed
- *
- * A write to a watchdog device is defined as a keepalive signal. Any
- * write of data will do, as we we don't define content meaning.
- */
-
-static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
-{
- if (count) {
- if (!nowayout) {
- size_t i;
-
- expect_close = 0;
-
- for (i = 0; i != count; i++) {
- char c;
- if(get_user(c, buf+i))
- return -EFAULT;
- if (c == 'V')
- expect_close = 42;
- }
- }
- wdtpci_ping();
- }
-
- return count;
-}
-
-/**
- * wdtpci_ioctl:
- * @inode: inode of the device
- * @file: file handle to the device
- * @cmd: watchdog command
- * @arg: argument pointer
- *
- * The watchdog API defines a common set of functions for all watchdogs
- * according to their available features. We only actually usefully support
- * querying capabilities and current status.
- */
-
-static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int new_heartbeat;
- int status;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
-
- static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT|
- WDIOF_MAGICCLOSE|
- WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = "PCI-WDT500/501",
- };
-
- /* Add options according to the card we have */
- ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
-#ifdef CONFIG_WDT_501_PCI
- ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
- if (tachometer)
- ident.options |= WDIOF_FANFAULT;
-#endif /* CONFIG_WDT_501_PCI */
-
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-
- case WDIOC_GETSTATUS:
- wdtpci_get_status(&status);
- return put_user(status, p);
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdtpci_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (wdtpci_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- wdtpci_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
- }
-}
-
-/**
- * wdtpci_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The watchdog device has been opened. The watchdog device is single
- * open and on opening we load the counters. Counter zero is a 100Hz
- * cascade, into counter 1 which downcounts to reboot. When the counter
- * triggers counter 2 downcounts the length of the reset pulse which
- * set set to be as long as possible.
- */
-
-static int wdtpci_open(struct inode *inode, struct file *file)
-{
- if (down_trylock(&open_sem))
- return -EBUSY;
-
- if (nowayout) {
- __module_get(THIS_MODULE);
- }
- /*
- * Activate
- */
- wdtpci_start();
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdtpci_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The watchdog has a configurable API. There is a religious dispute
- * between people who want their watchdog to be able to shut down and
- * those who want to be sure if the watchdog manager dies the machine
- * reboots. In the former case we disable the counters, in the latter
- * case you have to open it again very soon.
- */
-
-static int wdtpci_release(struct inode *inode, struct file *file)
-{
- if (expect_close == 42) {
- wdtpci_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping timer!");
- wdtpci_ping();
- }
- expect_close = 0;
- up(&open_sem);
- return 0;
-}
-
-#ifdef CONFIG_WDT_501_PCI
-/**
- * wdtpci_temp_read:
- * @file: file handle to the watchdog board
- * @buf: buffer to write 1 byte into
- * @count: length of buffer
- * @ptr: offset (no seek allowed)
- *
- * Read reports the temperature in degrees Fahrenheit. The API is in
- * fahrenheit. It was designed by an imperial measurement luddite.
- */
-
-static ssize_t wdtpci_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
-{
- int temperature;
-
- if (wdtpci_get_temperature(&temperature))
- return -EFAULT;
-
- if (copy_to_user (buf, &temperature, 1))
- return -EFAULT;
-
- return 1;
-}
-
-/**
- * wdtpci_temp_open:
- * @inode: inode of device
- * @file: file handle to device
- *
- * The temperature device has been opened.
- */
-
-static int wdtpci_temp_open(struct inode *inode, struct file *file)
-{
- return nonseekable_open(inode, file);
-}
-
-/**
- * wdtpci_temp_release:
- * @inode: inode to board
- * @file: file handle to board
- *
- * The temperature device has been closed.
- */
-
-static int wdtpci_temp_release(struct inode *inode, struct file *file)
-{
- return 0;
-}
-#endif /* CONFIG_WDT_501_PCI */
-
-/**
- * notify_sys:
- * @this: our notifier block
- * @code: the event being reported
- * @unused: unused
- *
- * Our notifier is called on system shutdowns. We want to turn the card
- * off at reboot otherwise the machine will reboot again during memory
- * test or worse yet during the following fsck. This would suck, in fact
- * trust me - if it happens it does suck.
- */
-
-static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
-{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the card off */
- wdtpci_stop();
- }
- return NOTIFY_DONE;
-}
-
-/*
- * Kernel Interfaces
- */
-
-
-static const struct file_operations wdtpci_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = wdtpci_write,
- .ioctl = wdtpci_ioctl,
- .open = wdtpci_open,
- .release = wdtpci_release,
-};
-
-static struct miscdevice wdtpci_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &wdtpci_fops,
-};
-
-#ifdef CONFIG_WDT_501_PCI
-static const struct file_operations wdtpci_temp_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = wdtpci_temp_read,
- .open = wdtpci_temp_open,
- .release = wdtpci_temp_release,
-};
-
-static struct miscdevice temp_miscdev = {
- .minor = TEMP_MINOR,
- .name = "temperature",
- .fops = &wdtpci_temp_fops,
-};
-#endif /* CONFIG_WDT_501_PCI */
-
-/*
- * The WDT card needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
- */
-
-static struct notifier_block wdtpci_notifier = {
- .notifier_call = wdtpci_notify_sys,
-};
-
-
-static int __devinit wdtpci_init_one (struct pci_dev *dev,
- const struct pci_device_id *ent)
-{
- int ret = -EIO;
-
- dev_count++;
- if (dev_count > 1) {
- printk (KERN_ERR PFX "this driver only supports 1 device\n");
- return -ENODEV;
- }
-
- if (pci_enable_device (dev)) {
- printk (KERN_ERR PFX "Not possible to enable PCI Device\n");
- return -ENODEV;
- }
-
- if (pci_resource_start (dev, 2) == 0x0000) {
- printk (KERN_ERR PFX "No I/O-Address for card detected\n");
- ret = -ENODEV;
- goto out_pci;
- }
-
- sema_init(&open_sem, 1);
- spin_lock_init(&wdtpci_lock);
-
- irq = dev->irq;
- io = pci_resource_start (dev, 2);
-
- if (request_region (io, 16, "wdt_pci") == NULL) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", io);
- goto out_pci;
- }
-
- if (request_irq (irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED,
- "wdt_pci", &wdtpci_miscdev)) {
- printk (KERN_ERR PFX "IRQ %d is not free\n", irq);
- goto out_reg;
- }
-
- printk ("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n",
- io, irq);
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (wdtpci_set_heartbeat(heartbeat)) {
- wdtpci_set_heartbeat(WD_TIMO);
- printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
- WD_TIMO);
- }
-
- ret = register_reboot_notifier (&wdtpci_notifier);
- if (ret) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
- goto out_irq;
- }
-
-#ifdef CONFIG_WDT_501_PCI
- ret = misc_register (&temp_miscdev);
- if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
- goto out_rbt;
- }
-#endif /* CONFIG_WDT_501_PCI */
-
- ret = misc_register (&wdtpci_miscdev);
- if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto out_misc;
- }
-
- printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
-#ifdef CONFIG_WDT_501_PCI
- printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
-#endif /* CONFIG_WDT_501_PCI */
-
- ret = 0;
-out:
- return ret;
-
-out_misc:
-#ifdef CONFIG_WDT_501_PCI
- misc_deregister(&temp_miscdev);
-out_rbt:
-#endif /* CONFIG_WDT_501_PCI */
- unregister_reboot_notifier(&wdtpci_notifier);
-out_irq:
- free_irq(irq, &wdtpci_miscdev);
-out_reg:
- release_region (io, 16);
-out_pci:
- pci_disable_device(dev);
- goto out;
-}
-
-
-static void __devexit wdtpci_remove_one (struct pci_dev *pdev)
-{
- /* here we assume only one device will ever have
- * been picked up and registered by probe function */
- misc_deregister(&wdtpci_miscdev);
-#ifdef CONFIG_WDT_501_PCI
- misc_deregister(&temp_miscdev);
-#endif /* CONFIG_WDT_501_PCI */
- unregister_reboot_notifier(&wdtpci_notifier);
- free_irq(irq, &wdtpci_miscdev);
- release_region(io, 16);
- pci_disable_device(pdev);
- dev_count--;
-}
-
-
-static struct pci_device_id wdtpci_pci_tbl[] = {
- {
- .vendor = PCI_VENDOR_ID_ACCESSIO,
- .device = PCI_DEVICE_ID_WDG_CSM,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- },
- { 0, }, /* terminate list */
-};
-MODULE_DEVICE_TABLE(pci, wdtpci_pci_tbl);
-
-
-static struct pci_driver wdtpci_driver = {
- .name = "wdt_pci",
- .id_table = wdtpci_pci_tbl,
- .probe = wdtpci_init_one,
- .remove = __devexit_p(wdtpci_remove_one),
-};
-
-
-/**
- * wdtpci_cleanup:
- *
- * Unload the watchdog. You cannot do this with any file handles open.
- * If your watchdog is set to continue ticking on close and you unload
- * it, well it keeps ticking. We won't get the interrupt but the board
- * will not touch PC memory so all is fine. You just have to load a new
- * module in xx seconds or reboot.
- */
-
-static void __exit wdtpci_cleanup(void)
-{
- pci_unregister_driver (&wdtpci_driver);
-}
-
-
-/**
- * wdtpci_init:
- *
- * Set up the WDT watchdog board. All we have to do is grab the
- * resources we require and bitch if anyone beat us to them.
- * The open() function will actually kick the board off.
- */
-
-static int __init wdtpci_init(void)
-{
- return pci_register_driver (&wdtpci_driver);
-}
-
-
-module_init(wdtpci_init);
-module_exit(wdtpci_cleanup);
-
-MODULE_AUTHOR("JP Nollmann, Alan Cox");
-MODULE_DESCRIPTION("Driver for the ICS PCI-WDT500/501 watchdog cards");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
--- /dev/null
+#
+# Watchdog device configuration
+#
+
+menuconfig WATCHDOG
+ bool "Watchdog Timer Support"
+ ---help---
+ If you say Y here (and to one of the following options) and create a
+ character special file /dev/watchdog with major number 10 and minor
+ number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
+ subsequently opening the file and then failing to write to it for
+ longer than 1 minute will result in rebooting the machine. This
+ could be useful for a networked machine that needs to come back
+ on-line as fast as possible after a lock-up. There's both a watchdog
+ implementation entirely in software (which can sometimes fail to
+ reboot the machine) and a driver for hardware watchdog boards, which
+ are more robust and can also keep track of the temperature inside
+ your computer. For details, read <file:Documentation/watchdog/watchdog.txt>
+ in the kernel source.
+
+ The watchdog is usually used together with the watchdog daemon
+ which is available from
+ <ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
+ also monitor NFS connections and can reboot the machine when the process
+ table is full.
+
+ If unsure, say N.
+
+if WATCHDOG
+
+config WATCHDOG_NOWAYOUT
+ bool "Disable watchdog shutdown on close"
+ help
+ The default watchdog behaviour (which you get if you say N here) is
+ to stop the timer if the process managing it closes the file
+ /dev/watchdog. It's always remotely possible that this process might
+ get killed. If you say Y here, the watchdog cannot be stopped once
+ it has been started.
+
+#
+# General Watchdog drivers
+#
+
+comment "Watchdog Device Drivers"
+
+# Architecture Independent
+
+config SOFT_WATCHDOG
+ tristate "Software watchdog"
+ help
+ A software monitoring watchdog. This will fail to reboot your system
+ from some situations that the hardware watchdog will recover
+ from. Equally it's a lot cheaper to install.
+
+ To compile this driver as a module, choose M here: the
+ module will be called softdog.
+
+# ALPHA Architecture
+
+# ARM Architecture
+
+config AT91RM9200_WATCHDOG
+ tristate "AT91RM9200 watchdog"
+ depends on ARCH_AT91RM9200
+ help
+ Watchdog timer embedded into AT91RM9200 chips. This will reboot your
+ system when the timeout is reached.
+
+config 21285_WATCHDOG
+ tristate "DC21285 watchdog"
+ depends on FOOTBRIDGE
+ help
+ The Intel Footbridge chip contains a built-in watchdog circuit. Say Y
+ here if you wish to use this. Alternatively say M to compile the
+ driver as a module, which will be called wdt285.
+
+ This driver does not work on all machines. In particular, early CATS
+ boards have hardware problems that will cause the machine to simply
+ lock up if the watchdog fires.
+
+ "If in doubt, leave it out" - say N.
+
+config 977_WATCHDOG
+ tristate "NetWinder WB83C977 watchdog"
+ depends on FOOTBRIDGE && ARCH_NETWINDER
+ help
+ Say Y here to include support for the WB977 watchdog included in
+ NetWinder machines. Alternatively say M to compile the driver as
+ a module, which will be called wdt977.
+
+ Not sure? It's safe to say N.
+
+config IXP2000_WATCHDOG
+ tristate "IXP2000 Watchdog"
+ depends on ARCH_IXP2000
+ help
+ Say Y here if to include support for the watchdog timer
+ in the Intel IXP2000(2400, 2800, 2850) network processors.
+ This driver can be built as a module by choosing M. The module
+ will be called ixp2000_wdt.
+
+ Say N if you are unsure.
+
+config IXP4XX_WATCHDOG
+ tristate "IXP4xx Watchdog"
+ depends on ARCH_IXP4XX
+ help
+ Say Y here if to include support for the watchdog timer
+ in the Intel IXP4xx network processors. This driver can
+ be built as a module by choosing M. The module will
+ be called ixp4xx_wdt.
+
+ Note: The internal IXP4xx watchdog does a soft CPU reset
+ which doesn't reset any peripherals. There are circumstances
+ where the watchdog will fail to reset the board correctly
+ (e.g., if the boot ROM is in an unreadable state).
+
+ Say N if you are unsure.
+
+config KS8695_WATCHDOG
+ tristate "KS8695 watchdog"
+ depends on ARCH_KS8695
+ help
+ Watchdog timer embedded into KS8695 processor. This will reboot your
+ system when the timeout is reached.
+
+config S3C2410_WATCHDOG
+ tristate "S3C2410 Watchdog"
+ depends on ARCH_S3C2410
+ help
+ Watchdog timer block in the Samsung S3C2410 chips. This will
+ reboot the system when the timer expires with the watchdog
+ enabled.
+
+ The driver is limited by the speed of the system's PCLK
+ signal, so with reasonably fast systems (PCLK around 50-66MHz)
+ then watchdog intervals of over approximately 20seconds are
+ unavailable.
+
+ The driver can be built as a module by choosing M, and will
+ be called s3c2410_wdt
+
+config SA1100_WATCHDOG
+ tristate "SA1100/PXA2xx watchdog"
+ depends on ARCH_SA1100 || ARCH_PXA
+ help
+ Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
+ reboot your system when timeout is reached.
+
+ NOTE: once enabled, this timer cannot be disabled.
+
+ To compile this driver as a module, choose M here: the
+ module will be called sa1100_wdt.
+
+config MPCORE_WATCHDOG
+ tristate "MPcore watchdog"
+ depends on ARM_MPCORE_PLATFORM && LOCAL_TIMERS
+ help
+ Watchdog timer embedded into the MPcore system.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mpcore_wdt.
+
+config EP93XX_WATCHDOG
+ tristate "EP93xx Watchdog"
+ depends on ARCH_EP93XX
+ help
+ Say Y here if to include support for the watchdog timer
+ embedded in the Cirrus Logic EP93xx family of devices.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ep93xx_wdt.
+
+config OMAP_WATCHDOG
+ tristate "OMAP Watchdog"
+ depends on ARCH_OMAP16XX || ARCH_OMAP24XX
+ help
+ Support for TI OMAP1610/OMAP1710/OMAP2420 watchdog. Say 'Y' here to
+ enable the OMAP1610/OMAP1710 watchdog timer.
+
+config PNX4008_WATCHDOG
+ tristate "PNX4008 Watchdog"
+ depends on ARCH_PNX4008
+ help
+ Say Y here if to include support for the watchdog timer
+ in the PNX4008 processor.
+ This driver can be built as a module by choosing M. The module
+ will be called pnx4008_wdt.
+
+ Say N if you are unsure.
+
+config IOP_WATCHDOG
+ tristate "IOP Watchdog"
+ depends on PLAT_IOP
+ select WATCHDOG_NOWAYOUT if (ARCH_IOP32X || ARCH_IOP33X)
+ help
+ Say Y here if to include support for the watchdog timer
+ in the Intel IOP3XX & IOP13XX I/O Processors. This driver can
+ be built as a module by choosing M. The module will
+ be called iop_wdt.
+
+ Note: The IOP13XX watchdog does an Internal Bus Reset which will
+ affect both cores and the peripherals of the IOP. The ATU-X
+ and/or ATUe configuration registers will remain intact, but if
+ operating as an Root Complex and/or Central Resource, the PCI-X
+ and/or PCIe busses will also be reset. THIS IS A VERY BIG HAMMER.
+
+config DAVINCI_WATCHDOG
+ tristate "DaVinci watchdog"
+ depends on ARCH_DAVINCI
+ help
+ Say Y here if to include support for the watchdog timer
+ in the DaVinci DM644x/DM646x processors.
+ To compile this driver as a module, choose M here: the
+ module will be called davinci_wdt.
+
+ NOTE: once enabled, this timer cannot be disabled.
+ Say N if you are unsure.
+
+# ARM26 Architecture
+
+# AVR32 Architecture
+
+config AT32AP700X_WDT
+ tristate "AT32AP700x watchdog"
+ depends on CPU_AT32AP7000
+ help
+ Watchdog timer embedded into AT32AP700x devices. This will reboot
+ your system when the timeout is reached.
+
+# BLACKFIN Architecture
+
+config BFIN_WDT
+ tristate "Blackfin On-Chip Watchdog Timer"
+ depends on BLACKFIN
+ ---help---
+ If you say yes here you will get support for the Blackfin On-Chip
+ Watchdog Timer. If you have one of these processors and wish to
+ have watchdog support enabled, say Y, otherwise say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called bfin_wdt.
+
+# CRIS Architecture
+
+# FRV Architecture
+
+# H8300 Architecture
+
+# X86 (i386 + ia64 + x86_64) Architecture
+
+config ACQUIRE_WDT
+ tristate "Acquire SBC Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on Single Board
+ Computers produced by Acquire Inc (and others). This watchdog
+ simply watches your kernel to make sure it doesn't freeze, and if
+ it does, it reboots your computer after a certain amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called acquirewdt.
+
+ Most people will say N.
+
+config ADVANTECH_WDT
+ tristate "Advantech SBC Watchdog Timer"
+ depends on X86
+ help
+ If you are configuring a Linux kernel for the Advantech single-board
+ computer, say `Y' here to support its built-in watchdog timer
+ feature. More information can be found at
+ <http://www.advantech.com.tw/products/>
+
+config ALIM1535_WDT
+ tristate "ALi M1535 PMU Watchdog Timer"
+ depends on X86 && PCI
+ ---help---
+ This is the driver for the hardware watchdog on the ALi M1535 PMU.
+
+ To compile this driver as a module, choose M here: the
+ module will be called alim1535_wdt.
+
+ Most people will say N.
+
+config ALIM7101_WDT
+ tristate "ALi M7101 PMU Computer Watchdog"
+ depends on X86 && PCI
+ help
+ This is the driver for the hardware watchdog on the ALi M7101 PMU
+ as used in the x86 Cobalt servers.
+
+ To compile this driver as a module, choose M here: the
+ module will be called alim7101_wdt.
+
+ Most people will say N.
+
+config SC520_WDT
+ tristate "AMD Elan SC520 processor Watchdog"
+ depends on X86
+ help
+ This is the driver for the hardware watchdog built in to the
+ AMD "Elan" SC520 microcomputer commonly used in embedded systems.
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
+
+ You can compile this driver directly into the kernel, or use
+ it as a module. The module will be called sc520_wdt.
+
+config EUROTECH_WDT
+ tristate "Eurotech CPU-1220/1410 Watchdog Timer"
+ depends on X86
+ help
+ Enable support for the watchdog timer on the Eurotech CPU-1220 and
+ CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
+ information are at <http://www.eurotech.it/>.
+
+config IB700_WDT
+ tristate "IB700 SBC Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the IB700 Single
+ Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
+ simply watches your kernel to make sure it doesn't freeze, and if
+ it does, it reboots your computer after a certain amount of time.
+
+ This driver is like the WDT501 driver but for slightly different hardware.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ib700wdt.
+
+ Most people will say N.
+
+config IBMASR
+ tristate "IBM Automatic Server Restart"
+ depends on X86
+ help
+ This is the driver for the IBM Automatic Server Restart watchdog
+ timer built-in into some eServer xSeries machines.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ibmasr.
+
+config WAFER_WDT
+ tristate "ICP Wafer 5823 Single Board Computer Watchdog"
+ depends on X86
+ help
+ This is a driver for the hardware watchdog on the ICP Wafer 5823
+ Single Board Computer (and probably other similar models).
+
+ To compile this driver as a module, choose M here: the
+ module will be called wafer5823wdt.
+
+config I6300ESB_WDT
+ tristate "Intel 6300ESB Timer/Watchdog"
+ depends on X86 && PCI
+ ---help---
+ Hardware driver for the watchdog timer built into the Intel
+ 6300ESB controller hub.
+
+ To compile this driver as a module, choose M here: the
+ module will be called i6300esb.
+
+config ITCO_WDT
+ tristate "Intel TCO Timer/Watchdog"
+ depends on (X86 || IA64) && PCI
+ ---help---
+ Hardware driver for the intel TCO timer based watchdog devices.
+ These drivers are included in the Intel 82801 I/O Controller
+ Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
+ controller hub.
+
+ The TCO (Total Cost of Ownership) timer is a watchdog timer
+ that will reboot the machine after its second expiration. The
+ expiration time can be configured with the "heartbeat" parameter.
+
+ On some motherboards the driver may fail to reset the chipset's
+ NO_REBOOT flag which prevents the watchdog from rebooting the
+ machine. If this is the case you will get a kernel message like
+ "failed to reset NO_REBOOT flag, reboot disabled by hardware".
+
+ To compile this driver as a module, choose M here: the
+ module will be called iTCO_wdt.
+
+config ITCO_VENDOR_SUPPORT
+ bool "Intel TCO Timer/Watchdog Specific Vendor Support"
+ depends on ITCO_WDT
+ ---help---
+ Add vendor specific support to the intel TCO timer based watchdog
+ devices. At this moment we only have additional support for some
+ SuperMicro Inc. motherboards.
+
+config SC1200_WDT
+ tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
+ depends on X86
+ help
+ This is a driver for National Semiconductor PC87307/PC97307 hardware
+ watchdog cards as found on the SC1200. This watchdog is mainly used
+ for power management purposes and can be used to power down the device
+ during inactivity periods (includes interrupt activity monitoring).
+
+ To compile this driver as a module, choose M here: the
+ module will be called sc1200wdt.
+
+ Most people will say N.
+
+config SCx200_WDT
+ tristate "National Semiconductor SCx200 Watchdog"
+ depends on SCx200 && PCI
+ help
+ Enable the built-in watchdog timer support on the National
+ Semiconductor SCx200 processors.
+
+ If compiled as a module, it will be called scx200_wdt.
+
+config PC87413_WDT
+ tristate "NS PC87413 watchdog"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the PC87413 chipset
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pc87413_wdt.
+
+ Most people will say N.
+
+config 60XX_WDT
+ tristate "SBC-60XX Watchdog Timer"
+ depends on X86
+ help
+ This driver can be used with the watchdog timer found on some
+ single board computers, namely the 6010 PII based computer.
+ It may well work with other cards. It reads port 0x443 to enable
+ and re-set the watchdog timer, and reads port 0x45 to disable
+ the watchdog. If you have a card that behave in similar ways,
+ you can probably make this driver work with your card as well.
+
+ You can compile this driver directly into the kernel, or use
+ it as a module. The module will be called sbc60xxwdt.
+
+config SBC8360_WDT
+ tristate "SBC8360 Watchdog Timer"
+ depends on X86
+ ---help---
+
+ This is the driver for the hardware watchdog on the SBC8360 Single
+ Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
+
+ To compile this driver as a module, choose M here: the
+ module will be called sbc8360.ko.
+
+ Most people will say N.
+
+config CPU5_WDT
+ tristate "SMA CPU5 Watchdog"
+ depends on X86
+ ---help---
+ TBD.
+ To compile this driver as a module, choose M here: the
+ module will be called cpu5wdt.
+
+config SMSC37B787_WDT
+ tristate "Winbond SMsC37B787 Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog component on the
+ Winbond SMsC37B787 chipset as used on the NetRunner Mainboard
+ from Vision Systems and maybe others.
+
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
+
+ Usually a userspace daemon will notify the kernel WDT driver that
+ userspace is still alive, at regular intervals.
+
+ To compile this driver as a module, choose M here: the
+ module will be called smsc37b787_wdt.
+
+ Most people will say N.
+
+config W83627HF_WDT
+ tristate "W83627HF Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the W83627HF chipset
+ as used in Advantech PC-9578 and Tyan S2721-533 motherboards
+ (and likely others). This watchdog simply watches your kernel to
+ make sure it doesn't freeze, and if it does, it reboots your computer
+ after a certain amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called w83627hf_wdt.
+
+ Most people will say N.
+
+config W83697HF_WDT
+ tristate "W83697HF/W83697HG Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the W83697HF/HG
+ chipset as used in Dedibox/VIA motherboards (and likely others).
+ This watchdog simply watches your kernel to make sure it doesn't
+ freeze, and if it does, it reboots your computer after a certain
+ amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called w83697hf_wdt.
+
+ Most people will say N.
+
+config W83877F_WDT
+ tristate "W83877F (EMACS) Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the W83877F chipset
+ as used in EMACS PC-104 motherboards (and likely others). This
+ watchdog simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called w83877f_wdt.
+
+ Most people will say N.
+
+config W83977F_WDT
+ tristate "W83977F (PCM-5335) Watchdog Timer"
+ depends on X86
+ ---help---
+ This is the driver for the hardware watchdog on the W83977F I/O chip
+ as used in AAEON's PCM-5335 SBC (and likely others). This
+ watchdog simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called w83977f_wdt.
+
+config MACHZ_WDT
+ tristate "ZF MachZ Watchdog"
+ depends on X86
+ ---help---
+ If you are using a ZF Micro MachZ processor, say Y here, otherwise
+ N. This is the driver for the watchdog timer built-in on that
+ processor using ZF-Logic interface. This watchdog simply watches
+ your kernel to make sure it doesn't freeze, and if it does, it
+ reboots your computer after a certain amount of time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called machzwd.
+
+config SBC_EPX_C3_WATCHDOG
+ tristate "Winsystems SBC EPX-C3 watchdog"
+ depends on X86
+ ---help---
+ This is the driver for the built-in watchdog timer on the EPX-C3
+ Single-board computer made by Winsystems, Inc.
+
+ *Note*: This hardware watchdog is not probeable and thus there
+ is no way to know if writing to its IO address will corrupt
+ your system or have any real effect. The only way to be sure
+ that this driver does what you want is to make sure you
+ are running it on an EPX-C3 from Winsystems with the watchdog
+ timer at IO address 0x1ee and 0x1ef. It will write to both those
+ IO ports. Basically, the assumption is made that if you compile
+ this driver into your kernel and/or load it as a module, that you
+ know what you are doing and that you are in fact running on an
+ EPX-C3 board!
+
+ To compile this driver as a module, choose M here: the
+ module will be called sbc_epx_c3.
+
+# M32R Architecture
+
+# M68K Architecture
+
+# M68KNOMMU Architecture
+
+# MIPS Architecture
+
+config INDYDOG
+ tristate "Indy/I2 Hardware Watchdog"
+ depends on SGI_IP22
+ help
+ Hardware driver for the Indy's/I2's watchdog. This is a
+ watchdog timer that will reboot the machine after a 60 second
+ timer expired and no process has written to /dev/watchdog during
+ that time.
+
+config WDT_MTX1
+ tristate "MTX-1 Hardware Watchdog"
+ depends on MIPS_MTX1
+ help
+ Hardware driver for the MTX-1 boards. This is a watchdog timer that
+ will reboot the machine after a 100 seconds timer expired.
+
+config WDT_RM9K_GPI
+ tristate "RM9000/GPI hardware watchdog"
+ depends on CPU_RM9000
+ help
+ Watchdog implementation using the GPI hardware found on
+ PMC-Sierra RM9xxx CPUs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called rm9k_wdt.
+
+# PARISC Architecture
+
+# POWERPC Architecture
+
+config MPC5200_WDT
+ tristate "MPC5200 Watchdog Timer"
+ depends on PPC_MPC52xx
+
+config 8xx_WDT
+ tristate "MPC8xx Watchdog Timer"
+ depends on 8xx
+
+config 83xx_WDT
+ tristate "MPC83xx Watchdog Timer"
+ depends on PPC_83xx
+
+config MV64X60_WDT
+ tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
+ depends on MV64X60
+
+config BOOKE_WDT
+ bool "PowerPC Book-E Watchdog Timer"
+ depends on BOOKE || 4xx
+ ---help---
+ Please see Documentation/watchdog/watchdog-api.txt for
+ more information.
+
+# PPC64 Architecture
+
+config WATCHDOG_RTAS
+ tristate "RTAS watchdog"
+ depends on PPC_RTAS
+ help
+ This driver adds watchdog support for the RTAS watchdog.
+
+ To compile this driver as a module, choose M here. The module
+ will be called wdrtas.
+
+# S390 Architecture
+
+config ZVM_WATCHDOG
+ tristate "z/VM Watchdog Timer"
+ depends on S390
+ help
+ IBM s/390 and zSeries machines running under z/VM 5.1 or later
+ provide a virtual watchdog timer to their guest that cause a
+ user define Control Program command to be executed after a
+ timeout.
+
+ To compile this driver as a module, choose M here. The module
+ will be called vmwatchdog.
+
+# SUPERH (sh + sh64) Architecture
+
+config SH_WDT
+ tristate "SuperH Watchdog"
+ depends on SUPERH && (CPU_SH3 || CPU_SH4)
+ help
+ This driver adds watchdog support for the integrated watchdog in the
+ SuperH processors. If you have one of these processors and wish
+ to have watchdog support enabled, say Y, otherwise say N.
+
+ As a side note, saying Y here will automatically boost HZ to 1000
+ so that the timer has a chance to clear the overflow counter. On
+ slower systems (such as the SH-2 and SH-3) this will likely yield
+ some performance issues. As such, the WDT should be avoided here
+ unless it is absolutely necessary.
+
+ To compile this driver as a module, choose M here: the
+ module will be called shwdt.
+
+config SH_WDT_MMAP
+ bool "Allow mmap of SH WDT"
+ default n
+ depends on SH_WDT
+ help
+ If you say Y here, user applications will be able to mmap the
+ WDT/CPG registers.
+
+# SPARC Architecture
+
+# SPARC64 Architecture
+
+config WATCHDOG_CP1XXX
+ tristate "CP1XXX Hardware Watchdog support"
+ depends on SPARC64 && PCI
+ ---help---
+ This is the driver for the hardware watchdog timers present on
+ Sun Microsystems CompactPCI models CP1400 and CP1500.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cpwatchdog.
+
+ If you do not have a CompactPCI model CP1400 or CP1500, or
+ another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
+ you should say N to this option.
+
+config WATCHDOG_RIO
+ tristate "RIO Hardware Watchdog support"
+ depends on SPARC64 && PCI
+ help
+ Say Y here to support the hardware watchdog capability on Sun RIO
+ machines. The watchdog timeout period is normally one minute but
+ can be changed with a boot-time parameter.
+
+# V850 Architecture
+
+# XTENSA Architecture
+
+#
+# ISA-based Watchdog Cards
+#
+
+comment "ISA-based Watchdog Cards"
+ depends on ISA
+
+config PCWATCHDOG
+ tristate "Berkshire Products ISA-PC Watchdog"
+ depends on ISA
+ ---help---
+ This is the driver for the Berkshire Products ISA-PC Watchdog card.
+ This card simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time. This driver is like the WDT501 driver but for different
+ hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
+ watchdog cards can be ordered from <http://www.berkprod.com/>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pcwd.
+
+ Most people will say N.
+
+config MIXCOMWD
+ tristate "Mixcom Watchdog"
+ depends on ISA
+ ---help---
+ This is a driver for the Mixcom hardware watchdog cards. This
+ watchdog simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mixcomwd.
+
+ Most people will say N.
+
+config WDT
+ tristate "WDT Watchdog timer"
+ depends on ISA
+ ---help---
+ If you have a WDT500P or WDT501P watchdog board, say Y here,
+ otherwise N. It is not possible to probe for this board, which means
+ that you have to inform the kernel about the IO port and IRQ that
+ is needed (you can do this via the io and irq parameters)
+
+ To compile this driver as a module, choose M here: the
+ module will be called wdt.
+
+config WDT_501
+ bool "WDT501 features"
+ depends on WDT
+ help
+ Saying Y here and creating a character special file /dev/temperature
+ with major number 10 and minor number 131 ("man mknod") will give
+ you a thermometer inside your computer: reading from
+ /dev/temperature yields one byte, the temperature in degrees
+ Fahrenheit. This works only if you have a WDT501P watchdog board
+ installed.
+
+ If you want to enable the Fan Tachometer on the WDT501P, then you
+ can do this via the tachometer parameter. Only do this if you have a
+ fan tachometer actually set up.
+
+#
+# PCI-based Watchdog Cards
+#
+
+comment "PCI-based Watchdog Cards"
+ depends on PCI
+
+config PCIPCWATCHDOG
+ tristate "Berkshire Products PCI-PC Watchdog"
+ depends on PCI
+ ---help---
+ This is the driver for the Berkshire Products PCI-PC Watchdog card.
+ This card simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time. The card can also monitor the internal temperature of the PC.
+ More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pcwd_pci.
+
+ Most people will say N.
+
+config WDTPCI
+ tristate "PCI-WDT500/501 Watchdog timer"
+ depends on PCI
+ ---help---
+ If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called wdt_pci.
+
+config WDT_501_PCI
+ bool "PCI-WDT501 features"
+ depends on WDTPCI
+ help
+ Saying Y here and creating a character special file /dev/temperature
+ with major number 10 and minor number 131 ("man mknod") will give
+ you a thermometer inside your computer: reading from
+ /dev/temperature yields one byte, the temperature in degrees
+ Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
+ installed.
+
+ If you want to enable the Fan Tachometer on the PCI-WDT501, then you
+ can do this via the tachometer parameter. Only do this if you have a
+ fan tachometer actually set up.
+
+#
+# USB-based Watchdog Cards
+#
+
+comment "USB-based Watchdog Cards"
+ depends on USB
+
+config USBPCWATCHDOG
+ tristate "Berkshire Products USB-PC Watchdog"
+ depends on USB
+ ---help---
+ This is the driver for the Berkshire Products USB-PC Watchdog card.
+ This card simply watches your kernel to make sure it doesn't freeze,
+ and if it does, it reboots your computer after a certain amount of
+ time. The card can also monitor the internal temperature of the PC.
+ More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called pcwd_usb.
+
+ Most people will say N.
+
+endif # WATCHDOG
--- /dev/null
+#
+# Makefile for the WatchDog device drivers.
+#
+
+# Only one watchdog can succeed. We probe the ISA/PCI/USB based
+# watchdog-cards first, then the architecture specific watchdog
+# drivers and then the architecture independant "softdog" driver.
+# This means that if your ISA/PCI/USB card isn't detected that
+# you can fall back to an architecture specific driver and if
+# that also fails then you can fall back to the software watchdog
+# to give you some cover.
+
+# ISA-based Watchdog Cards
+obj-$(CONFIG_PCWATCHDOG) += pcwd.o
+obj-$(CONFIG_MIXCOMWD) += mixcomwd.o
+obj-$(CONFIG_WDT) += wdt.o
+
+# PCI-based Watchdog Cards
+obj-$(CONFIG_PCIPCWATCHDOG) += pcwd_pci.o
+obj-$(CONFIG_WDTPCI) += wdt_pci.o
+
+# USB-based Watchdog Cards
+obj-$(CONFIG_USBPCWATCHDOG) += pcwd_usb.o
+
+# ALPHA Architecture
+
+# ARM Architecture
+obj-$(CONFIG_AT91RM9200_WATCHDOG) += at91rm9200_wdt.o
+obj-$(CONFIG_OMAP_WATCHDOG) += omap_wdt.o
+obj-$(CONFIG_21285_WATCHDOG) += wdt285.o
+obj-$(CONFIG_977_WATCHDOG) += wdt977.o
+obj-$(CONFIG_IXP2000_WATCHDOG) += ixp2000_wdt.o
+obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
+obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
+obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
+obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
+obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
+obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
+obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
+obj-$(CONFIG_IOP_WATCHDOG) += iop_wdt.o
+obj-$(CONFIG_DAVINCI_WATCHDOG) += davinci_wdt.o
+
+# ARM26 Architecture
+
+# AVR32 Architecture
+obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
+
+# BLACKFIN Architecture
+obj-$(CONFIG_BFIN_WDT) += bfin_wdt.o
+
+# CRIS Architecture
+
+# FRV Architecture
+
+# H8300 Architecture
+
+# X86 (i386 + ia64 + x86_64) Architecture
+obj-$(CONFIG_ACQUIRE_WDT) += acquirewdt.o
+obj-$(CONFIG_ADVANTECH_WDT) += advantechwdt.o
+obj-$(CONFIG_ALIM1535_WDT) += alim1535_wdt.o
+obj-$(CONFIG_ALIM7101_WDT) += alim7101_wdt.o
+obj-$(CONFIG_SC520_WDT) += sc520_wdt.o
+obj-$(CONFIG_EUROTECH_WDT) += eurotechwdt.o
+obj-$(CONFIG_IB700_WDT) += ib700wdt.o
+obj-$(CONFIG_IBMASR) += ibmasr.o
+obj-$(CONFIG_WAFER_WDT) += wafer5823wdt.o
+obj-$(CONFIG_I6300ESB_WDT) += i6300esb.o
+obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o iTCO_vendor_support.o
+obj-$(CONFIG_SC1200_WDT) += sc1200wdt.o
+obj-$(CONFIG_SCx200_WDT) += scx200_wdt.o
+obj-$(CONFIG_PC87413_WDT) += pc87413_wdt.o
+obj-$(CONFIG_60XX_WDT) += sbc60xxwdt.o
+obj-$(CONFIG_SBC8360_WDT) += sbc8360.o
+obj-$(CONFIG_CPU5_WDT) += cpu5wdt.o
+obj-$(CONFIG_SMSC37B787_WDT) += smsc37b787_wdt.o
+obj-$(CONFIG_W83627HF_WDT) += w83627hf_wdt.o
+obj-$(CONFIG_W83697HF_WDT) += w83697hf_wdt.o
+obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
+obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
+obj-$(CONFIG_MACHZ_WDT) += machzwd.o
+obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
+
+# M32R Architecture
+
+# M68K Architecture
+
+# M68KNOMMU Architecture
+
+# MIPS Architecture
+obj-$(CONFIG_INDYDOG) += indydog.o
+obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o
+obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
+
+# PARISC Architecture
+
+# POWERPC Architecture
+obj-$(CONFIG_8xx_WDT) += mpc8xx_wdt.o
+obj-$(CONFIG_MPC5200_WDT) += mpc5200_wdt.o
+obj-$(CONFIG_83xx_WDT) += mpc83xx_wdt.o
+obj-$(CONFIG_MV64X60_WDT) += mv64x60_wdt.o
+obj-$(CONFIG_BOOKE_WDT) += booke_wdt.o
+
+# PPC64 Architecture
+obj-$(CONFIG_WATCHDOG_RTAS) += wdrtas.o
+
+# S390 Architecture
+
+# SUPERH (sh + sh64) Architecture
+obj-$(CONFIG_SH_WDT) += shwdt.o
+
+# SPARC Architecture
+
+# SPARC64 Architecture
+
+# V850 Architecture
+
+# XTENSA Architecture
+
+# Architecture Independant
+obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
--- /dev/null
+/*
+ * Acquire Single Board Computer Watchdog Timer driver
+ *
+ * Based on wdt.c. Original copyright messages:
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ * Can't add timeout - driver doesn't allow changing value
+ */
+
+/*
+ * Theory of Operation:
+ * The Watch-Dog Timer is provided to ensure that standalone
+ * Systems can always recover from catastrophic conditions that
+ * caused the CPU to crash. This condition may have occured by
+ * external EMI or a software bug. When the CPU stops working
+ * correctly, hardware on the board will either perform a hardware
+ * reset (cold boot) or a non-maskable interrupt (NMI) to bring the
+ * system back to a known state.
+ *
+ * The Watch-Dog Timer is controlled by two I/O Ports.
+ * 443 hex - Read - Enable or refresh the Watch-Dog Timer
+ * 043 hex - Read - Disable the Watch-Dog Timer
+ *
+ * To enable the Watch-Dog Timer, a read from I/O port 443h must
+ * be performed. This will enable and activate the countdown timer
+ * which will eventually time out and either reset the CPU or cause
+ * an NMI depending on the setting of a jumper. To ensure that this
+ * reset condition does not occur, the Watch-Dog Timer must be
+ * periodically refreshed by reading the same I/O port 443h.
+ * The Watch-Dog Timer is disabled by reading I/O port 043h.
+ *
+ * The Watch-Dog Timer Time-Out Period is set via jumpers.
+ * It can be 1, 2, 10, 20, 110 or 220 seconds.
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+/* Includes */
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/fs.h> /* For file operations */
+#include <linux/ioport.h> /* For io-port access */
+#include <linux/platform_device.h> /* For platform_driver framework */
+#include <linux/init.h> /* For __init/__exit/... */
+
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+#include <asm/io.h> /* For inb/outb/... */
+
+/* Module information */
+#define DRV_NAME "acquirewdt"
+#define PFX DRV_NAME ": "
+#define WATCHDOG_NAME "Acquire WDT"
+#define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */
+
+/* internal variables */
+static struct platform_device *acq_platform_device; /* the watchdog platform device */
+static unsigned long acq_is_open;
+static char expect_close;
+
+/* module parameters */
+static int wdt_stop = 0x43; /* You must set this - there is no sane way to probe for this board. */
+module_param(wdt_stop, int, 0);
+MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)");
+
+static int wdt_start = 0x443; /* You must set this - there is no sane way to probe for this board. */
+module_param(wdt_start, int, 0);
+MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Watchdog Operations
+ */
+
+static void acq_keepalive(void)
+{
+ /* Write a watchdog value */
+ inb_p(wdt_start);
+}
+
+static void acq_stop(void)
+{
+ /* Turn the card off */
+ inb_p(wdt_stop);
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* Well, anyhow someone wrote to us, we should return that favour */
+ acq_keepalive();
+ }
+ return count;
+}
+
+static int acq_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int options, retval = -EINVAL;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident =
+ {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = WATCHDOG_NAME,
+ };
+
+ switch(cmd)
+ {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ acq_keepalive();
+ return 0;
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(WATCHDOG_HEARTBEAT, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD)
+ {
+ acq_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD)
+ {
+ acq_keepalive();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+static int acq_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &acq_is_open))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate */
+ acq_keepalive();
+ return nonseekable_open(inode, file);
+}
+
+static int acq_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ acq_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ acq_keepalive();
+ }
+ clear_bit(0, &acq_is_open);
+ expect_close = 0;
+ return 0;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations acq_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = acq_write,
+ .ioctl = acq_ioctl,
+ .open = acq_open,
+ .release = acq_close,
+};
+
+static struct miscdevice acq_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &acq_fops,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static int __devinit acq_probe(struct platform_device *dev)
+{
+ int ret;
+
+ if (wdt_stop != wdt_start) {
+ if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_stop);
+ ret = -EIO;
+ goto out;
+ }
+ }
+
+ if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_start);
+ ret = -EIO;
+ goto unreg_stop;
+ }
+
+ ret = misc_register(&acq_miscdev);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto unreg_regions;
+ }
+
+ printk (KERN_INFO PFX "initialized. (nowayout=%d)\n",
+ nowayout);
+
+ return 0;
+
+unreg_regions:
+ release_region(wdt_start, 1);
+unreg_stop:
+ if (wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
+out:
+ return ret;
+}
+
+static int __devexit acq_remove(struct platform_device *dev)
+{
+ misc_deregister(&acq_miscdev);
+ release_region(wdt_start,1);
+ if(wdt_stop != wdt_start)
+ release_region(wdt_stop,1);
+
+ return 0;
+}
+
+static void acq_shutdown(struct platform_device *dev)
+{
+ /* Turn the WDT off if we have a soft shutdown */
+ acq_stop();
+}
+
+static struct platform_driver acquirewdt_driver = {
+ .probe = acq_probe,
+ .remove = __devexit_p(acq_remove),
+ .shutdown = acq_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+static int __init acq_init(void)
+{
+ int err;
+
+ printk(KERN_INFO "WDT driver for Acquire single board computer initialising.\n");
+
+ err = platform_driver_register(&acquirewdt_driver);
+ if (err)
+ return err;
+
+ acq_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ if (IS_ERR(acq_platform_device)) {
+ err = PTR_ERR(acq_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&acquirewdt_driver);
+ return err;
+}
+
+static void __exit acq_exit(void)
+{
+ platform_device_unregister(acq_platform_device);
+ platform_driver_unregister(&acquirewdt_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(acq_init);
+module_exit(acq_exit);
+
+MODULE_AUTHOR("David Woodhouse");
+MODULE_DESCRIPTION("Acquire Inc. Single Board Computer Watchdog Timer driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Advantech Single Board Computer WDT driver
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * Based on acquirewdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ *
+ * 16-Oct-2002 Rob Radez <rob@osinvestor.com>
+ * Clean up ioctls, clean up init + exit, add expect close support,
+ * add wdt_start and wdt_stop as parameters.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define DRV_NAME "advantechwdt"
+#define PFX DRV_NAME ": "
+#define WATCHDOG_NAME "Advantech WDT"
+#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
+
+static struct platform_device *advwdt_platform_device; /* the watchdog platform device */
+static unsigned long advwdt_is_open;
+static char adv_expect_close;
+
+/*
+ * You must set these - there is no sane way to probe for this board.
+ *
+ * To enable or restart, write the timeout value in seconds (1 to 63)
+ * to I/O port wdt_start. To disable, read I/O port wdt_stop.
+ * Both are 0x443 for most boards (tested on a PCA-6276VE-00B1), but
+ * check your manual (at least the PCA-6159 seems to be different -
+ * the manual says wdt_stop is 0x43, not 0x443).
+ * (0x43 is also a write-only control register for the 8254 timer!)
+ */
+
+static int wdt_stop = 0x443;
+module_param(wdt_stop, int, 0);
+MODULE_PARM_DESC(wdt_stop, "Advantech WDT 'stop' io port (default 0x443)");
+
+static int wdt_start = 0x443;
+module_param(wdt_start, int, 0);
+MODULE_PARM_DESC(wdt_start, "Advantech WDT 'start' io port (default 0x443)");
+
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Watchdog Operations
+ */
+
+static void
+advwdt_ping(void)
+{
+ /* Write a watchdog value */
+ outb_p(timeout, wdt_start);
+}
+
+static void
+advwdt_disable(void)
+{
+ inb_p(wdt_stop);
+}
+
+static int
+advwdt_set_heartbeat(int t)
+{
+ if ((t < 1) || (t > 63))
+ return -EINVAL;
+
+ timeout = t;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t
+advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ adv_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf+i))
+ return -EFAULT;
+ if (c == 'V')
+ adv_expect_close = 42;
+ }
+ }
+ advwdt_ping();
+ }
+ return count;
+}
+
+static int
+advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int new_timeout;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = WATCHDOG_NAME,
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ advwdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (advwdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ advwdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ advwdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ advwdt_ping();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int
+advwdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &advwdt_is_open))
+ return -EBUSY;
+ /*
+ * Activate
+ */
+
+ advwdt_ping();
+ return nonseekable_open(inode, file);
+}
+
+static int
+advwdt_close(struct inode *inode, struct file *file)
+{
+ if (adv_expect_close == 42) {
+ advwdt_disable();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ advwdt_ping();
+ }
+ clear_bit(0, &advwdt_is_open);
+ adv_expect_close = 0;
+ return 0;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations advwdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = advwdt_write,
+ .ioctl = advwdt_ioctl,
+ .open = advwdt_open,
+ .release = advwdt_close,
+};
+
+static struct miscdevice advwdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &advwdt_fops,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static int __devinit
+advwdt_probe(struct platform_device *dev)
+{
+ int ret;
+
+ if (wdt_stop != wdt_start) {
+ if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_stop);
+ ret = -EIO;
+ goto out;
+ }
+ }
+
+ if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_start);
+ ret = -EIO;
+ goto unreg_stop;
+ }
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (advwdt_set_heartbeat(timeout)) {
+ advwdt_set_heartbeat(WATCHDOG_TIMEOUT);
+ printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n",
+ timeout);
+ }
+
+ ret = misc_register(&advwdt_miscdev);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto unreg_regions;
+ }
+
+ printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+out:
+ return ret;
+unreg_regions:
+ release_region(wdt_start, 1);
+unreg_stop:
+ if (wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
+ goto out;
+}
+
+static int __devexit
+advwdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&advwdt_miscdev);
+ release_region(wdt_start,1);
+ if(wdt_stop != wdt_start)
+ release_region(wdt_stop,1);
+
+ return 0;
+}
+
+static void
+advwdt_shutdown(struct platform_device *dev)
+{
+ /* Turn the WDT off if we have a soft shutdown */
+ advwdt_disable();
+}
+
+static struct platform_driver advwdt_driver = {
+ .probe = advwdt_probe,
+ .remove = __devexit_p(advwdt_remove),
+ .shutdown = advwdt_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+static int __init
+advwdt_init(void)
+{
+ int err;
+
+ printk(KERN_INFO "WDT driver for Advantech single board computer initialising.\n");
+
+ err = platform_driver_register(&advwdt_driver);
+ if (err)
+ return err;
+
+ advwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ if (IS_ERR(advwdt_platform_device)) {
+ err = PTR_ERR(advwdt_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&advwdt_driver);
+ return err;
+}
+
+static void __exit
+advwdt_exit(void)
+{
+ platform_device_unregister(advwdt_platform_device);
+ platform_driver_unregister(&advwdt_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(advwdt_init);
+module_exit(advwdt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marek Michalkiewicz <marekm@linux.org.pl>");
+MODULE_DESCRIPTION("Advantech Single Board Computer WDT driver");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog for the 7101 PMU version found in the ALi M1535 chipsets
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/pci.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define WATCHDOG_NAME "ALi_M1535"
+#define PFX WATCHDOG_NAME ": "
+#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
+
+/* internal variables */
+static unsigned long ali_is_open;
+static char ali_expect_release;
+static struct pci_dev *ali_pci;
+static u32 ali_timeout_bits; /* stores the computed timeout */
+static spinlock_t ali_lock; /* Guards the hardware */
+
+/* module parameters */
+static int timeout = WATCHDOG_TIMEOUT;
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (0<timeout<18000, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * ali_start - start watchdog countdown
+ *
+ * Starts the timer running providing the timer has a counter
+ * configuration set.
+ */
+
+static void ali_start(void)
+{
+ u32 val;
+
+ spin_lock(&ali_lock);
+
+ pci_read_config_dword(ali_pci, 0xCC, &val);
+ val &= ~0x3F; /* Mask count */
+ val |= (1<<25) | ali_timeout_bits;
+ pci_write_config_dword(ali_pci, 0xCC, val);
+
+ spin_unlock(&ali_lock);
+}
+
+/*
+ * ali_stop - stop the timer countdown
+ *
+ * Stop the ALi watchdog countdown
+ */
+
+static void ali_stop(void)
+{
+ u32 val;
+
+ spin_lock(&ali_lock);
+
+ pci_read_config_dword(ali_pci, 0xCC, &val);
+ val &= ~0x3F; /* Mask count to zero (disabled) */
+ val &= ~(1<<25);/* and for safety mask the reset enable */
+ pci_write_config_dword(ali_pci, 0xCC, val);
+
+ spin_unlock(&ali_lock);
+}
+
+/*
+ * ali_keepalive - send a keepalive to the watchdog
+ *
+ * Send a keepalive to the timer (actually we restart the timer).
+ */
+
+static void ali_keepalive(void)
+{
+ ali_start();
+}
+
+/*
+ * ali_settimer - compute the timer reload value
+ * @t: time in seconds
+ *
+ * Computes the timeout values needed
+ */
+
+static int ali_settimer(int t)
+{
+ if(t < 0)
+ return -EINVAL;
+ else if(t < 60)
+ ali_timeout_bits = t|(1<<6);
+ else if(t < 3600)
+ ali_timeout_bits = (t/60)|(1<<7);
+ else if(t < 18000)
+ ali_timeout_bits = (t/300)|(1<<6)|(1<<7);
+ else return -EINVAL;
+
+ timeout = t;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+/*
+ * ali_write - writes to ALi watchdog
+ * @file: file from VFS
+ * @data: user address of data
+ * @len: length of data
+ * @ppos: pointer to the file offset
+ *
+ * Handle a write to the ALi watchdog. Writing to the file pings
+ * the watchdog and resets it. Writing the magic 'V' sequence allows
+ * the next close to turn off the watchdog.
+ */
+
+static ssize_t ali_write(struct file *file, const char __user *data,
+ size_t len, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ ali_expect_release = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if(get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ ali_expect_release = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ ali_start();
+ }
+ return len;
+}
+
+/*
+ * ali_ioctl - handle watchdog ioctls
+ * @inode: VFS inode
+ * @file: VFS file pointer
+ * @cmd: ioctl number
+ * @arg: arguments to the ioctl
+ *
+ * Handle the watchdog ioctls supported by the ALi driver. Really
+ * we want an extension to enable irq ack monitoring and the like
+ */
+
+static int ali_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "ALi M1535 WatchDog Timer",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof (ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ ali_keepalive();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if (get_user (new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ ali_stop();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ ali_start();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+
+ if (ali_settimer(new_timeout))
+ return -EINVAL;
+
+ ali_keepalive();
+ /* Fall */
+ }
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * ali_open - handle open of ali watchdog
+ * @inode: inode from VFS
+ * @file: file from VFS
+ *
+ * Open the ALi watchdog device. Ensure only one person opens it
+ * at a time. Also start the watchdog running.
+ */
+
+static int ali_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &ali_is_open))
+ return -EBUSY;
+
+ /* Activate */
+ ali_start();
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * ali_release - close an ALi watchdog
+ * @inode: inode from VFS
+ * @file: file from VFS
+ *
+ * Close the ALi watchdog device. Actual shutdown of the timer
+ * only occurs if the magic sequence has been set.
+ */
+
+static int ali_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ */
+ if (ali_expect_release == 42) {
+ ali_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ ali_keepalive();
+ }
+ clear_bit(0, &ali_is_open);
+ ali_expect_release = 0;
+ return 0;
+}
+
+/*
+ * ali_notify_sys - System down notifier
+ *
+ * Notifier for system down
+ */
+
+
+static int ali_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the WDT off */
+ ali_stop();
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Data for PCI driver interface
+ *
+ * This data only exists for exporting the supported
+ * PCI ids via MODULE_DEVICE_TABLE. We do not actually
+ * register a pci_driver, because someone else might one day
+ * want to register another driver on the same PCI id.
+ */
+
+static struct pci_device_id ali_pci_tbl[] = {
+ { PCI_VENDOR_ID_AL, 0x1533, PCI_ANY_ID, PCI_ANY_ID,},
+ { PCI_VENDOR_ID_AL, 0x1535, PCI_ANY_ID, PCI_ANY_ID,},
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, ali_pci_tbl);
+
+/*
+ * ali_find_watchdog - find a 1535 and 7101
+ *
+ * Scans the PCI hardware for a 1535 series bridge and matching 7101
+ * watchdog device. This may be overtight but it is better to be safe
+ */
+
+static int __init ali_find_watchdog(void)
+{
+ struct pci_dev *pdev;
+ u32 wdog;
+
+ /* Check for a 1533/1535 series bridge */
+ pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x1535, NULL);
+ if (pdev == NULL)
+ pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x1533, NULL);
+ if (pdev == NULL)
+ return -ENODEV;
+ pci_dev_put(pdev);
+
+ /* Check for the a 7101 PMU */
+ pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x7101, NULL);
+ if(pdev == NULL)
+ return -ENODEV;
+
+ if(pci_enable_device(pdev)) {
+ pci_dev_put(pdev);
+ return -EIO;
+ }
+
+ ali_pci = pdev;
+
+ /*
+ * Initialize the timer bits
+ */
+ pci_read_config_dword(pdev, 0xCC, &wdog);
+
+ wdog &= ~0x3F; /* Timer bits */
+ wdog &= ~((1<<27)|(1<<26)|(1<<25)|(1<<24)); /* Issued events */
+ wdog &= ~((1<<16)|(1<<13)|(1<<12)|(1<<11)|(1<<10)|(1<<9)); /* No monitor bits */
+
+ pci_write_config_dword(pdev, 0xCC, wdog);
+
+ return 0;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations ali_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ali_write,
+ .ioctl = ali_ioctl,
+ .open = ali_open,
+ .release = ali_release,
+};
+
+static struct miscdevice ali_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ali_fops,
+};
+
+static struct notifier_block ali_notifier = {
+ .notifier_call = ali_notify_sys,
+};
+
+/*
+ * watchdog_init - module initialiser
+ *
+ * Scan for a suitable watchdog and if so initialize it. Return an error
+ * if we cannot, the error causes the module to unload
+ */
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ spin_lock_init(&ali_lock);
+
+ /* Check whether or not the hardware watchdog is there */
+ if (ali_find_watchdog() != 0) {
+ return -ENODEV;
+ }
+
+ /* Check that the timeout value is within it's range ; if not reset to the default */
+ if (timeout < 1 || timeout >= 18000) {
+ timeout = WATCHDOG_TIMEOUT;
+ printk(KERN_INFO PFX "timeout value must be 0<timeout<18000, using %d\n",
+ timeout);
+ }
+
+ /* Calculate the watchdog's timeout */
+ ali_settimer(timeout);
+
+ ret = misc_register(&ali_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto out;
+ }
+
+ ret = register_reboot_notifier(&ali_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto unreg_miscdev;
+ }
+
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+out:
+ return ret;
+unreg_miscdev:
+ misc_deregister(&ali_miscdev);
+ goto out;
+}
+
+/*
+ * watchdog_exit - module de-initialiser
+ *
+ * Called while unloading a successfully installed watchdog module.
+ */
+
+static void __exit watchdog_exit(void)
+{
+ /* Stop the timer before we leave */
+ ali_stop();
+
+ /* Deregister */
+ unregister_reboot_notifier(&ali_notifier);
+ misc_deregister(&ali_miscdev);
+ pci_dev_put(ali_pci);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("ALi M1535 PMU Watchdog Timer driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * ALi M7101 PMU Computer Watchdog Timer driver
+ *
+ * Based on w83877f_wdt.c by Scott Jennings <linuxdrivers@oro.net>
+ * and the Cobalt kernel WDT timer driver by Tim Hockin
+ * <thockin@cobaltnet.com>
+ *
+ * (c)2002 Steve Hill <steve@navaho.co.uk>
+ *
+ * This WDT driver is different from most other Linux WDT
+ * drivers in that the driver will ping the watchdog by itself,
+ * because this particular WDT has a very short timeout (1.6
+ * seconds) and it would be insane to count on any userspace
+ * daemon always getting scheduled within that time frame.
+ *
+ * Additions:
+ * Aug 23, 2004 - Added use_gpio module parameter for use on revision a1d PMUs
+ * found on very old cobalt hardware.
+ * -- Mike Waychison <michael.waychison@sun.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/pci.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define OUR_NAME "alim7101_wdt"
+#define PFX OUR_NAME ": "
+
+#define WDT_ENABLE 0x9C
+#define WDT_DISABLE 0x8C
+
+#define ALI_7101_WDT 0x92
+#define ALI_7101_GPIO 0x7D
+#define ALI_7101_GPIO_O 0x7E
+#define ALI_WDT_ARM 0x01
+
+/*
+ * We're going to use a 1 second timeout.
+ * If we reset the watchdog every ~250ms we should be safe. */
+
+#define WDT_INTERVAL (HZ/4+1)
+
+/*
+ * We must not require too good response from the userspace daemon.
+ * Here we require the userspace daemon to send us a heartbeat
+ * char to /dev/watchdog every 30 seconds.
+ */
+
+#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+static int use_gpio = 0; /* Use the pic (for a1d revision alim7101) */
+module_param(use_gpio, int, 0);
+MODULE_PARM_DESC(use_gpio, "Use the gpio watchdog. (required by old cobalt boards)");
+
+static void wdt_timer_ping(unsigned long);
+static DEFINE_TIMER(timer, wdt_timer_ping, 0, 1);
+static unsigned long next_heartbeat;
+static unsigned long wdt_is_open;
+static char wdt_expect_close;
+static struct pci_dev *alim7101_pmu;
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Whack the dog
+ */
+
+static void wdt_timer_ping(unsigned long data)
+{
+ /* If we got a heartbeat pulse within the WDT_US_INTERVAL
+ * we agree to ping the WDT
+ */
+ char tmp;
+
+ if(time_before(jiffies, next_heartbeat))
+ {
+ /* Ping the WDT (this is actually a disarm/arm sequence) */
+ pci_read_config_byte(alim7101_pmu, 0x92, &tmp);
+ pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
+ pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
+ if (use_gpio) {
+ pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
+ | 0x20);
+ pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
+ & ~0x20);
+ }
+ } else {
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ }
+ /* Re-set the timer interval */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+}
+
+/*
+ * Utility routines
+ */
+
+static void wdt_change(int writeval)
+{
+ char tmp;
+
+ pci_read_config_byte(alim7101_pmu, ALI_7101_WDT, &tmp);
+ if (writeval == WDT_ENABLE) {
+ pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
+ if (use_gpio) {
+ pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp & ~0x20);
+ }
+
+ } else {
+ pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
+ if (use_gpio) {
+ pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp | 0x20);
+ }
+ }
+}
+
+static void wdt_startup(void)
+{
+ next_heartbeat = jiffies + (timeout * HZ);
+
+ /* We must enable before we kick off the timer in case the timer
+ occurs as we ping it */
+
+ wdt_change(WDT_ENABLE);
+
+ /* Start the timer */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+
+ printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
+}
+
+static void wdt_turnoff(void)
+{
+ /* Stop the timer */
+ del_timer_sync(&timer);
+ wdt_change(WDT_DISABLE);
+ printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
+}
+
+static void wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count) {
+ if (!nowayout) {
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ wdt_expect_close = 0;
+
+ /* now scan */
+ for (ofs = 0; ofs != count; ofs++) {
+ char c;
+ if (get_user(c, buf+ofs))
+ return -EFAULT;
+ if (c == 'V')
+ wdt_expect_close = 42;
+ }
+ }
+ /* someone wrote to us, we should restart timer */
+ wdt_keepalive();
+ }
+ return count;
+}
+
+static int fop_open(struct inode * inode, struct file * file)
+{
+ /* Just in case we're already talking to someone... */
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ /* Good, fire up the show */
+ wdt_startup();
+ return nonseekable_open(inode, file);
+}
+
+static int fop_close(struct inode * inode, struct file * file)
+{
+ if(wdt_expect_close == 42)
+ wdt_turnoff();
+ else {
+ /* wim: shouldn't there be a: del_timer(&timer); */
+ printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ }
+ clear_bit(0, &wdt_is_open);
+ wdt_expect_close = 0;
+ return 0;
+}
+
+static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident =
+ {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "ALiM7101",
+ };
+
+ switch(cmd)
+ {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if(get_user(new_options, p))
+ return -EFAULT;
+
+ if(new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
+
+ if(new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if(get_user(new_timeout, p))
+ return -EFAULT;
+
+ if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ default:
+ return -ENOTTY;
+ }
+}
+
+static const struct file_operations wdt_fops = {
+ .owner= THIS_MODULE,
+ .llseek= no_llseek,
+ .write= fop_write,
+ .open= fop_open,
+ .release= fop_close,
+ .ioctl= fop_ioctl,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor=WATCHDOG_MINOR,
+ .name="watchdog",
+ .fops=&wdt_fops,
+};
+
+/*
+ * Notifier for system down
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT)
+ wdt_turnoff();
+
+ if (code==SYS_RESTART) {
+ /*
+ * Cobalt devices have no way of rebooting themselves other than
+ * getting the watchdog to pull reset, so we restart the watchdog on
+ * reboot with no heartbeat
+ */
+ wdt_change(WDT_ENABLE);
+ printk(KERN_INFO PFX "Watchdog timer is now enabled with no heartbeat - should reboot in ~1 second.\n");
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier=
+{
+ .notifier_call = wdt_notify_sys,
+};
+
+static void __exit alim7101_wdt_unload(void)
+{
+ wdt_turnoff();
+ /* Deregister */
+ misc_deregister(&wdt_miscdev);
+ unregister_reboot_notifier(&wdt_notifier);
+ pci_dev_put(alim7101_pmu);
+}
+
+static int __init alim7101_wdt_init(void)
+{
+ int rc = -EBUSY;
+ struct pci_dev *ali1543_south;
+ char tmp;
+
+ printk(KERN_INFO PFX "Steve Hill <steve@navaho.co.uk>.\n");
+ alim7101_pmu = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101,
+ NULL);
+ if (!alim7101_pmu) {
+ printk(KERN_INFO PFX "ALi M7101 PMU not present - WDT not set\n");
+ return -EBUSY;
+ }
+
+ /* Set the WDT in the PMU to 1 second */
+ pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, 0x02);
+
+ ali1543_south = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
+ NULL);
+ if (!ali1543_south) {
+ printk(KERN_INFO PFX "ALi 1543 South-Bridge not present - WDT not set\n");
+ goto err_out;
+ }
+ pci_read_config_byte(ali1543_south, 0x5e, &tmp);
+ pci_dev_put(ali1543_south);
+ if ((tmp & 0x1e) == 0x00) {
+ if (!use_gpio) {
+ printk(KERN_INFO PFX "Detected old alim7101 revision 'a1d'. If this is a cobalt board, set the 'use_gpio' module parameter.\n");
+ goto err_out;
+ }
+ nowayout = 1;
+ } else if ((tmp & 0x1e) != 0x12 && (tmp & 0x1e) != 0x00) {
+ printk(KERN_INFO PFX "ALi 1543 South-Bridge does not have the correct revision number (???1001?) - WDT not set\n");
+ goto err_out;
+ }
+
+ if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
+ {
+ timeout = WATCHDOG_TIMEOUT;
+ printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
+ timeout);
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out;
+ }
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
+ }
+
+ if (nowayout) {
+ __module_get(THIS_MODULE);
+ }
+
+ printk(KERN_INFO PFX "WDT driver for ALi M7101 initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+ return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt_miscdev);
+err_out:
+ pci_dev_put(alim7101_pmu);
+ return rc;
+}
+
+module_init(alim7101_wdt_init);
+module_exit(alim7101_wdt_unload);
+
+static struct pci_device_id alim7101_pci_tbl[] __devinitdata = {
+ { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533) },
+ { PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(pci, alim7101_pci_tbl);
+
+MODULE_AUTHOR("Steve Hill");
+MODULE_DESCRIPTION("ALi M7101 PMU Computer Watchdog Timer driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for Atmel AT32AP700X devices
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/watchdog.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+
+#define TIMEOUT_MIN 1
+#define TIMEOUT_MAX 2
+#define TIMEOUT_DEFAULT TIMEOUT_MAX
+
+/* module parameters */
+static int timeout = TIMEOUT_DEFAULT;
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,
+ "Timeout value. Limited to be 1 or 2 seconds. (default="
+ __MODULE_STRING(TIMEOUT_DEFAULT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/* Watchdog registers and write/read macro */
+#define WDT_CTRL 0x00
+#define WDT_CTRL_EN 0
+#define WDT_CTRL_PSEL 8
+#define WDT_CTRL_KEY 24
+
+#define WDT_CLR 0x04
+
+#define WDT_BIT(name) (1 << WDT_##name)
+#define WDT_BF(name, value) ((value) << WDT_##name)
+
+#define wdt_readl(dev, reg) \
+ __raw_readl((dev)->regs + WDT_##reg)
+#define wdt_writel(dev, reg, value) \
+ __raw_writel((value), (dev)->regs + WDT_##reg)
+
+struct wdt_at32ap700x {
+ void __iomem *regs;
+ spinlock_t io_lock;
+ int timeout;
+ unsigned long users;
+ struct miscdevice miscdev;
+};
+
+static struct wdt_at32ap700x *wdt;
+static char expect_release;
+
+/*
+ * Disable the watchdog.
+ */
+static inline void at32_wdt_stop(void)
+{
+ unsigned long psel;
+
+ spin_lock(&wdt->io_lock);
+ psel = wdt_readl(wdt, CTRL) & WDT_BF(CTRL_PSEL, 0x0f);
+ wdt_writel(wdt, CTRL, psel | WDT_BF(CTRL_KEY, 0x55));
+ wdt_writel(wdt, CTRL, psel | WDT_BF(CTRL_KEY, 0xaa));
+ spin_unlock(&wdt->io_lock);
+}
+
+/*
+ * Enable and reset the watchdog.
+ */
+static inline void at32_wdt_start(void)
+{
+ /* 0xf is 2^16 divider = 2 sec, 0xe is 2^15 divider = 1 sec */
+ unsigned long psel = (wdt->timeout > 1) ? 0xf : 0xe;
+
+ spin_lock(&wdt->io_lock);
+ wdt_writel(wdt, CTRL, WDT_BIT(CTRL_EN)
+ | WDT_BF(CTRL_PSEL, psel)
+ | WDT_BF(CTRL_KEY, 0x55));
+ wdt_writel(wdt, CTRL, WDT_BIT(CTRL_EN)
+ | WDT_BF(CTRL_PSEL, psel)
+ | WDT_BF(CTRL_KEY, 0xaa));
+ spin_unlock(&wdt->io_lock);
+}
+
+/*
+ * Pat the watchdog timer.
+ */
+static inline void at32_wdt_pat(void)
+{
+ spin_lock(&wdt->io_lock);
+ wdt_writel(wdt, CLR, 0x42);
+ spin_unlock(&wdt->io_lock);
+}
+
+/*
+ * Watchdog device is opened, and watchdog starts running.
+ */
+static int at32_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(1, &wdt->users))
+ return -EBUSY;
+
+ at32_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * Close the watchdog device.
+ */
+static int at32_wdt_close(struct inode *inode, struct file *file)
+{
+ if (expect_release == 42) {
+ at32_wdt_stop();
+ } else {
+ dev_dbg(wdt->miscdev.parent,
+ "Unexpected close, not stopping watchdog!\n");
+ at32_wdt_pat();
+ }
+ clear_bit(1, &wdt->users);
+ expect_release = 0;
+ return 0;
+}
+
+/*
+ * Change the watchdog time interval.
+ */
+static int at32_wdt_settimeout(int time)
+{
+ /*
+ * All counting occurs at 1 / SLOW_CLOCK (32 kHz) and max prescaler is
+ * 2 ^ 16 allowing up to 2 seconds timeout.
+ */
+ if ((time < TIMEOUT_MIN) || (time > TIMEOUT_MAX))
+ return -EINVAL;
+
+ /*
+ * Set new watchdog time. It will be used when at32_wdt_start() is
+ * called.
+ */
+ wdt->timeout = time;
+ return 0;
+}
+
+static struct watchdog_info at32_wdt_info = {
+ .identity = "at32ap700x watchdog",
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+};
+
+/*
+ * Handle commands from user-space.
+ */
+static int at32_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret = -ENOTTY;
+ int time;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ at32_wdt_pat();
+ ret = 0;
+ break;
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user(argp, &at32_wdt_info,
+ sizeof(at32_wdt_info)) ? -EFAULT : 0;
+ break;
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(time, p);
+ if (ret)
+ break;
+ ret = at32_wdt_settimeout(time);
+ if (ret)
+ break;
+ /* Enable new time value */
+ at32_wdt_start();
+ /* fall through */
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(wdt->timeout, p);
+ break;
+ case WDIOC_GETSTATUS: /* fall through */
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(0, p);
+ break;
+ case WDIOC_SETOPTIONS:
+ ret = get_user(time, p);
+ if (ret)
+ break;
+ if (time & WDIOS_DISABLECARD)
+ at32_wdt_stop();
+ if (time & WDIOS_ENABLECARD)
+ at32_wdt_start();
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+static ssize_t at32_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /*
+ * note: just in case someone wrote the magic
+ * character five months ago...
+ */
+ expect_release = 0;
+
+ /*
+ * scan to see whether or not we got the magic
+ * character
+ */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_release = 42;
+ }
+ }
+ /* someone wrote to us, we should pat the watchdog */
+ at32_wdt_pat();
+ }
+ return len;
+}
+
+static const struct file_operations at32_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = at32_wdt_ioctl,
+ .open = at32_wdt_open,
+ .release = at32_wdt_close,
+ .write = at32_wdt_write,
+};
+
+static int __init at32_wdt_probe(struct platform_device *pdev)
+{
+ struct resource *regs;
+ int ret;
+
+ if (wdt) {
+ dev_dbg(&pdev->dev, "only 1 wdt instance supported.\n");
+ return -EBUSY;
+ }
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs) {
+ dev_dbg(&pdev->dev, "missing mmio resource\n");
+ return -ENXIO;
+ }
+
+ wdt = kzalloc(sizeof(struct wdt_at32ap700x), GFP_KERNEL);
+ if (!wdt) {
+ dev_dbg(&pdev->dev, "no memory for wdt structure\n");
+ return -ENOMEM;
+ }
+
+ wdt->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!wdt->regs) {
+ ret = -ENOMEM;
+ dev_dbg(&pdev->dev, "could not map I/O memory\n");
+ goto err_free;
+ }
+ spin_lock_init(&wdt->io_lock);
+ wdt->users = 0;
+ wdt->miscdev.minor = WATCHDOG_MINOR;
+ wdt->miscdev.name = "watchdog";
+ wdt->miscdev.fops = &at32_wdt_fops;
+
+ if (at32_wdt_settimeout(timeout)) {
+ at32_wdt_settimeout(TIMEOUT_DEFAULT);
+ dev_dbg(&pdev->dev,
+ "default timeout invalid, set to %d sec.\n",
+ TIMEOUT_DEFAULT);
+ }
+
+ ret = misc_register(&wdt->miscdev);
+ if (ret) {
+ dev_dbg(&pdev->dev, "failed to register wdt miscdev\n");
+ goto err_iounmap;
+ }
+
+ platform_set_drvdata(pdev, wdt);
+ wdt->miscdev.parent = &pdev->dev;
+ dev_info(&pdev->dev,
+ "AT32AP700X WDT at 0x%p, timeout %d sec (nowayout=%d)\n",
+ wdt->regs, wdt->timeout, nowayout);
+
+ return 0;
+
+err_iounmap:
+ iounmap(wdt->regs);
+err_free:
+ kfree(wdt);
+ wdt = NULL;
+ return ret;
+}
+
+static int __exit at32_wdt_remove(struct platform_device *pdev)
+{
+ if (wdt && platform_get_drvdata(pdev) == wdt) {
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ at32_wdt_stop();
+
+ misc_deregister(&wdt->miscdev);
+ iounmap(wdt->regs);
+ kfree(wdt);
+ wdt = NULL;
+ platform_set_drvdata(pdev, NULL);
+ }
+
+ return 0;
+}
+
+static void at32_wdt_shutdown(struct platform_device *pdev)
+{
+ at32_wdt_stop();
+}
+
+#ifdef CONFIG_PM
+static int at32_wdt_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ at32_wdt_stop();
+ return 0;
+}
+
+static int at32_wdt_resume(struct platform_device *pdev)
+{
+ if (wdt->users)
+ at32_wdt_start();
+ return 0;
+}
+#else
+#define at32_wdt_suspend NULL
+#define at32_wdt_resume NULL
+#endif
+
+static struct platform_driver at32_wdt_driver = {
+ .remove = __exit_p(at32_wdt_remove),
+ .suspend = at32_wdt_suspend,
+ .resume = at32_wdt_resume,
+ .driver = {
+ .name = "at32_wdt",
+ .owner = THIS_MODULE,
+ },
+ .shutdown = at32_wdt_shutdown,
+};
+
+static int __init at32_wdt_init(void)
+{
+ return platform_driver_probe(&at32_wdt_driver, at32_wdt_probe);
+}
+module_init(at32_wdt_init);
+
+static void __exit at32_wdt_exit(void)
+{
+ platform_driver_unregister(&at32_wdt_driver);
+}
+module_exit(at32_wdt_exit);
+
+MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
+MODULE_DESCRIPTION("Watchdog driver for Atmel AT32AP700X");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for Atmel AT91RM9200 (Thunder)
+ *
+ * Copyright (C) 2003 SAN People (Pty) Ltd
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <asm/bitops.h>
+#include <asm/uaccess.h>
+#include <asm/arch/at91_st.h>
+
+
+#define WDT_DEFAULT_TIME 5 /* seconds */
+#define WDT_MAX_TIME 256 /* seconds */
+
+static int wdt_time = WDT_DEFAULT_TIME;
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+module_param(wdt_time, int, 0);
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+#endif
+
+
+static unsigned long at91wdt_busy;
+
+/* ......................................................................... */
+
+/*
+ * Disable the watchdog.
+ */
+static void inline at91_wdt_stop(void)
+{
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
+}
+
+/*
+ * Enable and reset the watchdog.
+ */
+static void inline at91_wdt_start(void)
+{
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
+ at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+/*
+ * Reload the watchdog timer. (ie, pat the watchdog)
+ */
+static void inline at91_wdt_reload(void)
+{
+ at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
+}
+
+/* ......................................................................... */
+
+/*
+ * Watchdog device is opened, and watchdog starts running.
+ */
+static int at91_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &at91wdt_busy))
+ return -EBUSY;
+
+ at91_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * Close the watchdog device.
+ * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
+ * disabled.
+ */
+static int at91_wdt_close(struct inode *inode, struct file *file)
+{
+ if (!nowayout)
+ at91_wdt_stop(); /* Disable the watchdog when file is closed */
+
+ clear_bit(0, &at91wdt_busy);
+ return 0;
+}
+
+/*
+ * Change the watchdog time interval.
+ */
+static int at91_wdt_settimeout(int new_time)
+{
+ /*
+ * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+ *
+ * Since WDV is a 16-bit counter, the maximum period is
+ * 65536 / 0.256 = 256 seconds.
+ */
+ if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
+ return -EINVAL;
+
+ /* Set new watchdog time. It will be used when at91_wdt_start() is called. */
+ wdt_time = new_time;
+ return 0;
+}
+
+static struct watchdog_info at91_wdt_info = {
+ .identity = "at91 watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+};
+
+/*
+ * Handle commands from user-space.
+ */
+static int at91_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_value;
+
+ switch(cmd) {
+ case WDIOC_KEEPALIVE:
+ at91_wdt_reload(); /* pat the watchdog */
+ return 0;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (at91_wdt_settimeout(new_value))
+ return -EINVAL;
+
+ /* Enable new time value */
+ at91_wdt_start();
+
+ /* Return current value */
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (new_value & WDIOS_DISABLECARD)
+ at91_wdt_stop();
+ if (new_value & WDIOS_ENABLECARD)
+ at91_wdt_start();
+ return 0;
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * Pat the watchdog whenever device is written to.
+ */
+static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ at91_wdt_reload(); /* pat the watchdog */
+ return len;
+}
+
+/* ......................................................................... */
+
+static const struct file_operations at91wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = at91_wdt_ioctl,
+ .open = at91_wdt_open,
+ .release = at91_wdt_close,
+ .write = at91_wdt_write,
+};
+
+static struct miscdevice at91wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &at91wdt_fops,
+};
+
+static int __init at91wdt_probe(struct platform_device *pdev)
+{
+ int res;
+
+ if (at91wdt_miscdev.parent)
+ return -EBUSY;
+ at91wdt_miscdev.parent = &pdev->dev;
+
+ res = misc_register(&at91wdt_miscdev);
+ if (res)
+ return res;
+
+ printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+ return 0;
+}
+
+static int __exit at91wdt_remove(struct platform_device *pdev)
+{
+ int res;
+
+ res = misc_deregister(&at91wdt_miscdev);
+ if (!res)
+ at91wdt_miscdev.parent = NULL;
+
+ return res;
+}
+
+static void at91wdt_shutdown(struct platform_device *pdev)
+{
+ at91_wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ at91_wdt_stop();
+ return 0;
+}
+
+static int at91wdt_resume(struct platform_device *pdev)
+{
+ if (at91wdt_busy)
+ at91_wdt_start();
+ return 0;
+}
+
+#else
+#define at91wdt_suspend NULL
+#define at91wdt_resume NULL
+#endif
+
+static struct platform_driver at91wdt_driver = {
+ .probe = at91wdt_probe,
+ .remove = __exit_p(at91wdt_remove),
+ .shutdown = at91wdt_shutdown,
+ .suspend = at91wdt_suspend,
+ .resume = at91wdt_resume,
+ .driver = {
+ .name = "at91_wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init at91_wdt_init(void)
+{
+ /* Check that the heartbeat value is within range; if not reset to the default */
+ if (at91_wdt_settimeout(wdt_time)) {
+ at91_wdt_settimeout(WDT_DEFAULT_TIME);
+ pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);
+ }
+
+ return platform_driver_register(&at91wdt_driver);
+}
+
+static void __exit at91_wdt_exit(void)
+{
+ platform_driver_unregister(&at91wdt_driver);
+}
+
+module_init(at91_wdt_init);
+module_exit(at91_wdt_exit);
+
+MODULE_AUTHOR("Andrew Victor");
+MODULE_DESCRIPTION("Watchdog driver for Atmel AT91RM9200");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Blackfin On-Chip Watchdog Driver
+ * Supports BF53[123]/BF53[467]/BF54[2489]/BF561
+ *
+ * Originally based on softdog.c
+ * Copyright 2006-2007 Analog Devices Inc.
+ * Copyright 2006-2007 Michele d'Amico
+ * Copyright 1996 Alan Cox <alan@redhat.com>
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/blackfin.h>
+#include <asm/uaccess.h>
+
+#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
+#define stampit() stamp("here i am")
+
+#define WATCHDOG_NAME "bfin-wdt"
+#define PFX WATCHDOG_NAME ": "
+
+/* The BF561 has two watchdogs (one per core), but since Linux
+ * only runs on core A, we'll just work with that one.
+ */
+#ifdef BF561_FAMILY
+# define bfin_read_WDOG_CTL() bfin_read_WDOGA_CTL()
+# define bfin_read_WDOG_CNT() bfin_read_WDOGA_CNT()
+# define bfin_read_WDOG_STAT() bfin_read_WDOGA_STAT()
+# define bfin_write_WDOG_CTL(x) bfin_write_WDOGA_CTL(x)
+# define bfin_write_WDOG_CNT(x) bfin_write_WDOGA_CNT(x)
+# define bfin_write_WDOG_STAT(x) bfin_write_WDOGA_STAT(x)
+#endif
+
+/* Bit in SWRST that indicates boot caused by watchdog */
+#define SWRST_RESET_WDOG 0x4000
+
+/* Bit in WDOG_CTL that indicates watchdog has expired (WDR0) */
+#define WDOG_EXPIRED 0x8000
+
+/* Masks for WDEV field in WDOG_CTL register */
+#define ICTL_RESET 0x0
+#define ICTL_NMI 0x2
+#define ICTL_GPI 0x4
+#define ICTL_NONE 0x6
+#define ICTL_MASK 0x6
+
+/* Masks for WDEN field in WDOG_CTL register */
+#define WDEN_MASK 0x0FF0
+#define WDEN_ENABLE 0x0000
+#define WDEN_DISABLE 0x0AD0
+
+/* some defaults */
+#define WATCHDOG_TIMEOUT 20
+
+static unsigned int timeout = WATCHDOG_TIMEOUT;
+static int nowayout = WATCHDOG_NOWAYOUT;
+static struct watchdog_info bfin_wdt_info;
+static unsigned long open_check;
+static char expect_close;
+static spinlock_t bfin_wdt_spinlock = SPIN_LOCK_UNLOCKED;
+
+/**
+ * bfin_wdt_keepalive - Keep the Userspace Watchdog Alive
+ *
+ * The Userspace watchdog got a KeepAlive: schedule the next timeout.
+ */
+static int bfin_wdt_keepalive(void)
+{
+ stampit();
+ bfin_write_WDOG_STAT(0);
+ return 0;
+}
+
+/**
+ * bfin_wdt_stop - Stop the Watchdog
+ *
+ * Stops the on-chip watchdog.
+ */
+static int bfin_wdt_stop(void)
+{
+ stampit();
+ bfin_write_WDOG_CTL(WDEN_DISABLE);
+ return 0;
+}
+
+/**
+ * bfin_wdt_start - Start the Watchdog
+ *
+ * Starts the on-chip watchdog. Automatically loads WDOG_CNT
+ * into WDOG_STAT for us.
+ */
+static int bfin_wdt_start(void)
+{
+ stampit();
+ bfin_write_WDOG_CTL(WDEN_ENABLE | ICTL_RESET);
+ return 0;
+}
+
+/**
+ * bfin_wdt_running - Check Watchdog status
+ *
+ * See if the watchdog is running.
+ */
+static int bfin_wdt_running(void)
+{
+ stampit();
+ return ((bfin_read_WDOG_CTL() & WDEN_MASK) != WDEN_DISABLE);
+}
+
+/**
+ * bfin_wdt_set_timeout - Set the Userspace Watchdog timeout
+ * @t: new timeout value (in seconds)
+ *
+ * Translate the specified timeout in seconds into System Clock
+ * terms which is what the on-chip Watchdog requires.
+ */
+static int bfin_wdt_set_timeout(unsigned long t)
+{
+ u32 cnt;
+ unsigned long flags;
+
+ stampit();
+
+ cnt = t * get_sclk();
+ if (cnt < get_sclk()) {
+ printk(KERN_WARNING PFX "timeout value is too large\n");
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&bfin_wdt_spinlock, flags);
+ {
+ int run = bfin_wdt_running();
+ bfin_wdt_stop();
+ bfin_write_WDOG_CNT(cnt);
+ if (run) bfin_wdt_start();
+ }
+ spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
+
+ timeout = t;
+
+ return 0;
+}
+
+/**
+ * bfin_wdt_open - Open the Device
+ * @inode: inode of device
+ * @file: file handle of device
+ *
+ * Watchdog device is opened and started.
+ */
+static int bfin_wdt_open(struct inode *inode, struct file *file)
+{
+ stampit();
+
+ if (test_and_set_bit(0, &open_check))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ bfin_wdt_keepalive();
+ bfin_wdt_start();
+
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * bfin_wdt_close - Close the Device
+ * @inode: inode of device
+ * @file: file handle of device
+ *
+ * Watchdog device is closed and stopped.
+ */
+static int bfin_wdt_release(struct inode *inode, struct file *file)
+{
+ stampit();
+
+ if (expect_close == 42) {
+ bfin_wdt_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ bfin_wdt_keepalive();
+ }
+
+ expect_close = 0;
+ clear_bit(0, &open_check);
+
+ return 0;
+}
+
+/**
+ * bfin_wdt_write - Write to Device
+ * @file: file handle of device
+ * @buf: buffer to write
+ * @count: length of buffer
+ * @ppos: offset
+ *
+ * Pings the watchdog on write.
+ */
+static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ stampit();
+
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ bfin_wdt_keepalive();
+ }
+
+ return len;
+}
+
+/**
+ * bfin_wdt_ioctl - Query Device
+ * @inode: inode of device
+ * @file: file handle of device
+ * @cmd: watchdog command
+ * @arg: argument
+ *
+ * Query basic information from the device or ping it, as outlined by the
+ * watchdog API.
+ */
+static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ stampit();
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
+ return -EFAULT;
+ else
+ return 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
+
+ case WDIOC_KEEPALIVE:
+ bfin_wdt_keepalive();
+ return 0;
+
+ case WDIOC_SETTIMEOUT: {
+ int new_timeout;
+
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+
+ if (bfin_wdt_set_timeout(new_timeout))
+ return -EINVAL;
+ }
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ case WDIOC_SETOPTIONS: {
+ unsigned long flags;
+ int options, ret = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ spin_lock_irqsave(&bfin_wdt_spinlock, flags);
+
+ if (options & WDIOS_DISABLECARD) {
+ bfin_wdt_stop();
+ ret = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ bfin_wdt_start();
+ ret = 0;
+ }
+
+ spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
+
+ return ret;
+ }
+ }
+}
+
+/**
+ * bfin_wdt_notify_sys - Notifier Handler
+ * @this: notifier block
+ * @code: notifier event
+ * @unused: unused
+ *
+ * Handles specific events, such as turning off the watchdog during a
+ * shutdown event.
+ */
+static int bfin_wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ stampit();
+
+ if (code == SYS_DOWN || code == SYS_HALT)
+ bfin_wdt_stop();
+
+ return NOTIFY_DONE;
+}
+
+#ifdef CONFIG_PM
+static int state_before_suspend;
+
+/**
+ * bfin_wdt_suspend - suspend the watchdog
+ * @pdev: device being suspended
+ * @state: requested suspend state
+ *
+ * Remember if the watchdog was running and stop it.
+ * TODO: is this even right? Doesn't seem to be any
+ * standard in the watchdog world ...
+ */
+static int bfin_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ stampit();
+
+ state_before_suspend = bfin_wdt_running();
+ bfin_wdt_stop();
+
+ return 0;
+}
+
+/**
+ * bfin_wdt_resume - resume the watchdog
+ * @pdev: device being resumed
+ *
+ * If the watchdog was running, turn it back on.
+ */
+static int bfin_wdt_resume(struct platform_device *pdev)
+{
+ stampit();
+
+ if (state_before_suspend) {
+ bfin_wdt_set_timeout(timeout);
+ bfin_wdt_start();
+ }
+
+ return 0;
+}
+#else
+# define bfin_wdt_suspend NULL
+# define bfin_wdt_resume NULL
+#endif
+
+static struct platform_device bfin_wdt_device = {
+ .name = WATCHDOG_NAME,
+ .id = -1,
+};
+
+static struct platform_driver bfin_wdt_driver = {
+ .driver = {
+ .name = WATCHDOG_NAME,
+ .owner = THIS_MODULE,
+ },
+ .suspend = bfin_wdt_suspend,
+ .resume = bfin_wdt_resume,
+};
+
+static struct file_operations bfin_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = bfin_wdt_write,
+ .ioctl = bfin_wdt_ioctl,
+ .open = bfin_wdt_open,
+ .release = bfin_wdt_release,
+};
+
+static struct miscdevice bfin_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &bfin_wdt_fops,
+};
+
+static struct watchdog_info bfin_wdt_info = {
+ .identity = "Blackfin Watchdog",
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+};
+
+static struct notifier_block bfin_wdt_notifier = {
+ .notifier_call = bfin_wdt_notify_sys,
+};
+
+/**
+ * bfin_wdt_init - Initialize module
+ *
+ * Registers the device and notifier handler. Actual device
+ * initialization is handled by bfin_wdt_open().
+ */
+static int __init bfin_wdt_init(void)
+{
+ int ret;
+
+ stampit();
+
+ /* Check that the timeout value is within range */
+ if (bfin_wdt_set_timeout(timeout))
+ return -EINVAL;
+
+ /* Since this is an on-chip device and needs no board-specific
+ * resources, we'll handle all the platform device stuff here.
+ */
+ ret = platform_device_register(&bfin_wdt_device);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_probe(&bfin_wdt_driver, NULL);
+ if (ret)
+ return ret;
+
+ ret = register_reboot_notifier(&bfin_wdt_notifier);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
+ return ret;
+ }
+
+ ret = misc_register(&bfin_wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&bfin_wdt_notifier);
+ return ret;
+ }
+
+ printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+ return 0;
+}
+
+/**
+ * bfin_wdt_exit - Deinitialize module
+ *
+ * Unregisters the device and notifier handler. Actual device
+ * deinitialization is handled by bfin_wdt_close().
+ */
+static void __exit bfin_wdt_exit(void)
+{
+ misc_deregister(&bfin_wdt_miscdev);
+ unregister_reboot_notifier(&bfin_wdt_notifier);
+}
+
+module_init(bfin_wdt_init);
+module_exit(bfin_wdt_exit);
+
+MODULE_AUTHOR("Michele d'Amico, Mike Frysinger <vapier@gentoo.org>");
+MODULE_DESCRIPTION("Blackfin Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(timeout, uint, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
--- /dev/null
+/*
+ * drivers/char/watchdog/booke_wdt.c
+ *
+ * Watchdog timer for PowerPC Book-E systems
+ *
+ * Author: Matthew McClintock
+ * Maintainer: Kumar Gala <galak@kernel.crashing.org>
+ *
+ * Copyright 2005 Freescale Semiconductor Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/notifier.h>
+#include <linux/watchdog.h>
+
+#include <asm/reg_booke.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* If the kernel parameter wdt=1, the watchdog will be enabled at boot.
+ * Also, the wdt_period sets the watchdog timer period timeout.
+ * For E500 cpus the wdt_period sets which bit changing from 0->1 will
+ * trigger a watchog timeout. This watchdog timeout will occur 3 times, the
+ * first time nothing will happen, the second time a watchdog exception will
+ * occur, and the final time the board will reset.
+ */
+
+#ifdef CONFIG_FSL_BOOKE
+#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
+#else
+#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
+#endif /* for timing information */
+
+u32 booke_wdt_enabled = 0;
+u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
+
+#ifdef CONFIG_FSL_BOOKE
+#define WDTP(x) ((((63-x)&0x3)<<30)|(((63-x)&0x3c)<<15))
+#else
+#define WDTP(x) (TCR_WP(x))
+#endif
+
+/*
+ * booke_wdt_ping:
+ */
+static __inline__ void booke_wdt_ping(void)
+{
+ mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
+}
+
+/*
+ * booke_wdt_enable:
+ */
+static __inline__ void booke_wdt_enable(void)
+{
+ u32 val;
+
+ /* clear status before enabling watchdog */
+ booke_wdt_ping();
+ val = mfspr(SPRN_TCR);
+ val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
+
+ mtspr(SPRN_TCR, val);
+}
+
+/*
+ * booke_wdt_write:
+ */
+static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ booke_wdt_ping();
+ return count;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .firmware_version = 0,
+ .identity = "PowerPC Book-E Watchdog",
+};
+
+/*
+ * booke_wdt_ioctl:
+ */
+static int booke_wdt_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ u32 tmp = 0;
+ u32 __user *p = (u32 __user *)arg;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user ((struct watchdog_info __user *) arg, &ident,
+ sizeof(struct watchdog_info)))
+ return -EFAULT;
+ case WDIOC_GETSTATUS:
+ return put_user(ident.options, p);
+ case WDIOC_GETBOOTSTATUS:
+ /* XXX: something is clearing TSR */
+ tmp = mfspr(SPRN_TSR) & TSR_WRS(3);
+ /* returns 1 if last reset was caused by the WDT */
+ return (tmp ? 1 : 0);
+ case WDIOC_KEEPALIVE:
+ booke_wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(booke_wdt_period, p))
+ return -EFAULT;
+ mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(booke_wdt_period, p);
+ case WDIOC_SETOPTIONS:
+ if (get_user(tmp, p))
+ return -EINVAL;
+ if (tmp == WDIOS_ENABLECARD) {
+ booke_wdt_ping();
+ break;
+ } else
+ return -EINVAL;
+ return 0;
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+/*
+ * booke_wdt_open:
+ */
+static int booke_wdt_open (struct inode *inode, struct file *file)
+{
+ if (booke_wdt_enabled == 0) {
+ booke_wdt_enabled = 1;
+ booke_wdt_enable();
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ booke_wdt_period);
+ }
+
+ return nonseekable_open(inode, file);
+}
+
+static const struct file_operations booke_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = booke_wdt_write,
+ .ioctl = booke_wdt_ioctl,
+ .open = booke_wdt_open,
+};
+
+static struct miscdevice booke_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &booke_wdt_fops,
+};
+
+static void __exit booke_wdt_exit(void)
+{
+ misc_deregister(&booke_wdt_miscdev);
+}
+
+/*
+ * booke_wdt_init:
+ */
+static int __init booke_wdt_init(void)
+{
+ int ret = 0;
+
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
+ ident.firmware_version = cur_cpu_spec->pvr_value;
+
+ ret = misc_register(&booke_wdt_miscdev);
+ if (ret) {
+ printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ return ret;
+ }
+
+ if (booke_wdt_enabled == 1) {
+ printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ booke_wdt_period);
+ booke_wdt_enable();
+ }
+
+ return ret;
+}
+device_initcall(booke_wdt_init);
--- /dev/null
+/*
+ * sma cpu5 watchdog driver
+ *
+ * Copyright (C) 2003 Heiko Ronsdorf <hero@ihg.uni-duisburg.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/timer.h>
+#include <linux/completion.h>
+#include <linux/jiffies.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <linux/watchdog.h>
+
+/* adjustable parameters */
+
+static int verbose = 0;
+static int port = 0x91;
+static int ticks = 10000;
+
+#define PFX "cpu5wdt: "
+
+#define CPU5WDT_EXTENT 0x0A
+
+#define CPU5WDT_STATUS_REG 0x00
+#define CPU5WDT_TIME_A_REG 0x02
+#define CPU5WDT_TIME_B_REG 0x03
+#define CPU5WDT_MODE_REG 0x04
+#define CPU5WDT_TRIGGER_REG 0x07
+#define CPU5WDT_ENABLE_REG 0x08
+#define CPU5WDT_RESET_REG 0x09
+
+#define CPU5WDT_INTERVAL (HZ/10+1)
+
+/* some device data */
+
+static struct {
+ struct completion stop;
+ volatile int running;
+ struct timer_list timer;
+ volatile int queue;
+ int default_ticks;
+ unsigned long inuse;
+} cpu5wdt_device;
+
+/* generic helper functions */
+
+static void cpu5wdt_trigger(unsigned long unused)
+{
+ if ( verbose > 2 )
+ printk(KERN_DEBUG PFX "trigger at %i ticks\n", ticks);
+
+ if( cpu5wdt_device.running )
+ ticks--;
+
+ /* keep watchdog alive */
+ outb(1, port + CPU5WDT_TRIGGER_REG);
+
+ /* requeue?? */
+ if (cpu5wdt_device.queue && ticks)
+ mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL);
+ else {
+ /* ticks doesn't matter anyway */
+ complete(&cpu5wdt_device.stop);
+ }
+
+}
+
+static void cpu5wdt_reset(void)
+{
+ ticks = cpu5wdt_device.default_ticks;
+
+ if ( verbose )
+ printk(KERN_DEBUG PFX "reset (%i ticks)\n", (int) ticks);
+
+}
+
+static void cpu5wdt_start(void)
+{
+ if ( !cpu5wdt_device.queue ) {
+ cpu5wdt_device.queue = 1;
+ outb(0, port + CPU5WDT_TIME_A_REG);
+ outb(0, port + CPU5WDT_TIME_B_REG);
+ outb(1, port + CPU5WDT_MODE_REG);
+ outb(0, port + CPU5WDT_RESET_REG);
+ outb(0, port + CPU5WDT_ENABLE_REG);
+ mod_timer(&cpu5wdt_device.timer, jiffies + CPU5WDT_INTERVAL);
+ }
+ /* if process dies, counter is not decremented */
+ cpu5wdt_device.running++;
+}
+
+static int cpu5wdt_stop(void)
+{
+ if ( cpu5wdt_device.running )
+ cpu5wdt_device.running = 0;
+
+ ticks = cpu5wdt_device.default_ticks;
+
+ if ( verbose )
+ printk(KERN_CRIT PFX "stop not possible\n");
+
+ return -EIO;
+}
+
+/* filesystem operations */
+
+static int cpu5wdt_open(struct inode *inode, struct file *file)
+{
+ if ( test_and_set_bit(0, &cpu5wdt_device.inuse) )
+ return -EBUSY;
+
+ return nonseekable_open(inode, file);
+}
+
+static int cpu5wdt_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &cpu5wdt_device.inuse);
+ return 0;
+}
+
+static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ unsigned int value;
+ static struct watchdog_info ident =
+ {
+ .options = WDIOF_CARDRESET,
+ .identity = "CPU5 WDT",
+ };
+
+ switch(cmd) {
+ case WDIOC_KEEPALIVE:
+ cpu5wdt_reset();
+ break;
+ case WDIOC_GETSTATUS:
+ value = inb(port + CPU5WDT_STATUS_REG);
+ value = (value >> 2) & 1;
+ if ( copy_to_user(argp, &value, sizeof(int)) )
+ return -EFAULT;
+ break;
+ case WDIOC_GETBOOTSTATUS:
+ if ( copy_to_user(argp, &value, sizeof(int)) )
+ return -EFAULT;
+ break;
+ case WDIOC_GETSUPPORT:
+ if ( copy_to_user(argp, &ident, sizeof(ident)) )
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if ( copy_from_user(&value, argp, sizeof(int)) )
+ return -EFAULT;
+ switch(value) {
+ case WDIOS_ENABLECARD:
+ cpu5wdt_start();
+ break;
+ case WDIOS_DISABLECARD:
+ return cpu5wdt_stop();
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static ssize_t cpu5wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if ( !count )
+ return -EIO;
+
+ cpu5wdt_reset();
+
+ return count;
+}
+
+static const struct file_operations cpu5wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = cpu5wdt_ioctl,
+ .open = cpu5wdt_open,
+ .write = cpu5wdt_write,
+ .release = cpu5wdt_release,
+};
+
+static struct miscdevice cpu5wdt_misc = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &cpu5wdt_fops,
+};
+
+/* init/exit function */
+
+static int __devinit cpu5wdt_init(void)
+{
+ unsigned int val;
+ int err;
+
+ if ( verbose )
+ printk(KERN_DEBUG PFX "port=0x%x, verbose=%i\n", port, verbose);
+
+ if ( !request_region(port, CPU5WDT_EXTENT, PFX) ) {
+ printk(KERN_ERR PFX "request_region failed\n");
+ err = -EBUSY;
+ goto no_port;
+ }
+
+ if ( (err = misc_register(&cpu5wdt_misc)) < 0 ) {
+ printk(KERN_ERR PFX "misc_register failed\n");
+ goto no_misc;
+ }
+
+ /* watchdog reboot? */
+ val = inb(port + CPU5WDT_STATUS_REG);
+ val = (val >> 2) & 1;
+ if ( !val )
+ printk(KERN_INFO PFX "sorry, was my fault\n");
+
+ init_completion(&cpu5wdt_device.stop);
+ cpu5wdt_device.queue = 0;
+
+ clear_bit(0, &cpu5wdt_device.inuse);
+
+ setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
+
+ cpu5wdt_device.default_ticks = ticks;
+
+ printk(KERN_INFO PFX "init success\n");
+
+ return 0;
+
+no_misc:
+ release_region(port, CPU5WDT_EXTENT);
+no_port:
+ return err;
+}
+
+static int __devinit cpu5wdt_init_module(void)
+{
+ return cpu5wdt_init();
+}
+
+static void __devexit cpu5wdt_exit(void)
+{
+ if ( cpu5wdt_device.queue ) {
+ cpu5wdt_device.queue = 0;
+ wait_for_completion(&cpu5wdt_device.stop);
+ }
+
+ misc_deregister(&cpu5wdt_misc);
+
+ release_region(port, CPU5WDT_EXTENT);
+
+}
+
+static void __devexit cpu5wdt_exit_module(void)
+{
+ cpu5wdt_exit();
+}
+
+/* module entry points */
+
+module_init(cpu5wdt_init_module);
+module_exit(cpu5wdt_exit_module);
+
+MODULE_AUTHOR("Heiko Ronsdorf <hero@ihg.uni-duisburg.de>");
+MODULE_DESCRIPTION("sma cpu5 watchdog driver");
+MODULE_SUPPORTED_DEVICE("sma cpu5 watchdog");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(port, int, 0);
+MODULE_PARM_DESC(port, "base address of watchdog card, default is 0x91");
+
+module_param(verbose, int, 0);
+MODULE_PARM_DESC(verbose, "be verbose, default is 0 (no)");
+
+module_param(ticks, int, 0);
+MODULE_PARM_DESC(ticks, "count down ticks, default is 10000");
--- /dev/null
+/*
+ * drivers/char/watchdog/davinci_wdt.c
+ *
+ * Watchdog driver for DaVinci DM644x/DM646x processors
+ *
+ * Copyright (C) 2006 Texas Instruments.
+ *
+ * 2007 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define MODULE_NAME "DAVINCI-WDT: "
+
+#define DEFAULT_HEARTBEAT 60
+#define MAX_HEARTBEAT 600 /* really the max margin is 264/27MHz*/
+
+/* Timer register set definition */
+#define PID12 (0x0)
+#define EMUMGT (0x4)
+#define TIM12 (0x10)
+#define TIM34 (0x14)
+#define PRD12 (0x18)
+#define PRD34 (0x1C)
+#define TCR (0x20)
+#define TGCR (0x24)
+#define WDTCR (0x28)
+
+/* TCR bit definitions */
+#define ENAMODE12_DISABLED (0 << 6)
+#define ENAMODE12_ONESHOT (1 << 6)
+#define ENAMODE12_PERIODIC (2 << 6)
+
+/* TGCR bit definitions */
+#define TIM12RS_UNRESET (1 << 0)
+#define TIM34RS_UNRESET (1 << 1)
+#define TIMMODE_64BIT_WDOG (2 << 2)
+
+/* WDTCR bit definitions */
+#define WDEN (1 << 14)
+#define WDFLAG (1 << 15)
+#define WDKEY_SEQ0 (0xa5c6 << 16)
+#define WDKEY_SEQ1 (0xda7e << 16)
+
+static int heartbeat = DEFAULT_HEARTBEAT;
+
+static spinlock_t io_lock;
+static unsigned long wdt_status;
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+#define WDT_REGION_INITED 2
+#define WDT_DEVICE_INITED 3
+
+static struct resource *wdt_mem;
+static void __iomem *wdt_base;
+
+static void wdt_service(void)
+{
+ spin_lock(&io_lock);
+
+ /* put watchdog in service state */
+ davinci_writel(WDKEY_SEQ0, wdt_base + WDTCR);
+ /* put watchdog in active state */
+ davinci_writel(WDKEY_SEQ1, wdt_base + WDTCR);
+
+ spin_unlock(&io_lock);
+}
+
+static void wdt_enable(void)
+{
+ u32 tgcr;
+ u32 timer_margin;
+
+ spin_lock(&io_lock);
+
+ /* disable, internal clock source */
+ davinci_writel(0, wdt_base + TCR);
+ /* reset timer, set mode to 64-bit watchdog, and unreset */
+ davinci_writel(0, wdt_base + TGCR);
+ tgcr = TIMMODE_64BIT_WDOG | TIM12RS_UNRESET | TIM34RS_UNRESET;
+ davinci_writel(tgcr, wdt_base + TGCR);
+ /* clear counter regs */
+ davinci_writel(0, wdt_base + TIM12);
+ davinci_writel(0, wdt_base + TIM34);
+ /* set timeout period */
+ timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
+ davinci_writel(timer_margin, wdt_base + PRD12);
+ timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
+ davinci_writel(timer_margin, wdt_base + PRD34);
+ /* enable run continuously */
+ davinci_writel(ENAMODE12_PERIODIC, wdt_base + TCR);
+ /* Once the WDT is in pre-active state write to
+ * TIM12, TIM34, PRD12, PRD34, TCR, TGCR, WDTCR are
+ * write protected (except for the WDKEY field)
+ */
+ /* put watchdog in pre-active state */
+ davinci_writel(WDKEY_SEQ0 | WDEN, wdt_base + WDTCR);
+ /* put watchdog in active state */
+ davinci_writel(WDKEY_SEQ1 | WDEN, wdt_base + WDTCR);
+
+ spin_unlock(&io_lock);
+}
+
+static int davinci_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+davinci_wdt_write(struct file *file, const char *data, size_t len,
+ loff_t *ppos)
+{
+ if (len)
+ wdt_service();
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING,
+ .identity = "DaVinci Watchdog",
+};
+
+static int
+davinci_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -ENOTTY;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(heartbeat, (int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_service();
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int davinci_wdt_release(struct inode *inode, struct file *file)
+{
+ wdt_service();
+ clear_bit(WDT_IN_USE, &wdt_status);
+
+ return 0;
+}
+
+static const struct file_operations davinci_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = davinci_wdt_write,
+ .ioctl = davinci_wdt_ioctl,
+ .open = davinci_wdt_open,
+ .release = davinci_wdt_release,
+};
+
+static struct miscdevice davinci_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &davinci_wdt_fops,
+};
+
+static int davinci_wdt_probe(struct platform_device *pdev)
+{
+ int ret = 0, size;
+ struct resource *res;
+
+ spin_lock_init(&io_lock);
+
+ if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT)
+ heartbeat = DEFAULT_HEARTBEAT;
+
+ printk(KERN_INFO MODULE_NAME
+ "DaVinci Watchdog Timer: heartbeat %d sec\n", heartbeat);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ printk(KERN_INFO MODULE_NAME
+ "failed to get memory region resource\n");
+ return -ENOENT;
+ }
+
+ size = res->end - res->start + 1;
+ wdt_mem = request_mem_region(res->start, size, pdev->name);
+
+ if (wdt_mem == NULL) {
+ printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
+ return -ENOENT;
+ }
+ wdt_base = (void __iomem *)(res->start);
+
+ ret = misc_register(&davinci_wdt_miscdev);
+ if (ret < 0) {
+ printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ } else {
+ set_bit(WDT_DEVICE_INITED, &wdt_status);
+ }
+
+ return ret;
+}
+
+static int davinci_wdt_remove(struct platform_device *pdev)
+{
+ misc_deregister(&davinci_wdt_miscdev);
+ if (wdt_mem) {
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ wdt_mem = NULL;
+ }
+ return 0;
+}
+
+static struct platform_driver platform_wdt_driver = {
+ .driver = {
+ .name = "watchdog",
+ },
+ .probe = davinci_wdt_probe,
+ .remove = davinci_wdt_remove,
+};
+
+static int __init davinci_wdt_init(void)
+{
+ return platform_driver_register(&platform_wdt_driver);
+}
+
+static void __exit davinci_wdt_exit(void)
+{
+ return platform_driver_unregister(&platform_wdt_driver);
+}
+
+module_init(davinci_wdt_init);
+module_exit(davinci_wdt_exit);
+
+MODULE_AUTHOR("Texas Instruments");
+MODULE_DESCRIPTION("DaVinci Watchdog Driver");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat period in seconds from 1 to "
+ __MODULE_STRING(MAX_HEARTBEAT) ", default "
+ __MODULE_STRING(DEFAULT_HEARTBEAT));
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for Cirrus Logic EP93xx family of devices.
+ *
+ * Copyright (c) 2004 Ray Lehtiniemi
+ * Copyright (c) 2006 Tower Technologies
+ * Based on ep93xx driver, bits from alim7101_wdt.c
+ *
+ * Authors: Ray Lehtiniemi <rayl@mail.com>,
+ * Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * This watchdog fires after 250msec, which is a too short interval
+ * for us to rely on the user space daemon alone. So we ping the
+ * wdt each ~200msec and eventually stop doing it if the user space
+ * daemon dies.
+ *
+ * TODO:
+ *
+ * - Test last reset from watchdog status
+ * - Add a few missing ioctls
+ */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/timer.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+
+#define WDT_VERSION "0.3"
+#define PFX "ep93xx_wdt: "
+
+/* default timeout (secs) */
+#define WDT_TIMEOUT 30
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static int timeout = WDT_TIMEOUT;
+
+static struct timer_list timer;
+static unsigned long next_heartbeat;
+static unsigned long wdt_status;
+static unsigned long boot_status;
+
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+
+#define EP93XX_WDT_REG(x) (EP93XX_WATCHDOG_BASE + (x))
+#define EP93XX_WDT_WATCHDOG EP93XX_WDT_REG(0x00)
+#define EP93XX_WDT_WDSTATUS EP93XX_WDT_REG(0x04)
+
+/* reset the wdt every ~200ms */
+#define WDT_INTERVAL (HZ/5)
+
+static void wdt_enable(void)
+{
+ __raw_writew(0xaaaa, EP93XX_WDT_WATCHDOG);
+}
+
+static void wdt_disable(void)
+{
+ __raw_writew(0xaa55, EP93XX_WDT_WATCHDOG);
+}
+
+static inline void wdt_ping(void)
+{
+ __raw_writew(0x5555, EP93XX_WDT_WATCHDOG);
+}
+
+static void wdt_startup(void)
+{
+ next_heartbeat = jiffies + (timeout * HZ);
+
+ wdt_enable();
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+}
+
+static void wdt_shutdown(void)
+{
+ del_timer_sync(&timer);
+ wdt_disable();
+}
+
+static void wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+}
+
+static int ep93xx_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ wdt_startup();
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+ep93xx_wdt_write(struct file *file, const char __user *data, size_t len,
+ loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+
+ if (c == 'V')
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ else
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ }
+ }
+ wdt_keepalive();
+ }
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE,
+ .identity = "EP93xx Watchdog",
+};
+
+static int
+ep93xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -ENOTTY;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info __user *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int __user *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(boot_status, (int __user *)arg);
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ /* actually, it is 0.250 seconds.... */
+ ret = put_user(1, (int __user *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int ep93xx_wdt_release(struct inode *inode, struct file *file)
+{
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
+ wdt_shutdown();
+ else
+ printk(KERN_CRIT PFX "Device closed unexpectedly - "
+ "timer will not stop\n");
+
+ clear_bit(WDT_IN_USE, &wdt_status);
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ return 0;
+}
+
+static const struct file_operations ep93xx_wdt_fops = {
+ .owner = THIS_MODULE,
+ .write = ep93xx_wdt_write,
+ .ioctl = ep93xx_wdt_ioctl,
+ .open = ep93xx_wdt_open,
+ .release = ep93xx_wdt_release,
+};
+
+static struct miscdevice ep93xx_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ep93xx_wdt_fops,
+};
+
+static void ep93xx_timer_ping(unsigned long data)
+{
+ if (time_before(jiffies, next_heartbeat))
+ wdt_ping();
+
+ /* Re-set the timer interval */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+}
+
+static int __init ep93xx_wdt_init(void)
+{
+ int err;
+
+ err = misc_register(&ep93xx_wdt_miscdev);
+
+ boot_status = __raw_readl(EP93XX_WDT_WATCHDOG) & 0x01 ? 1 : 0;
+
+ printk(KERN_INFO PFX "EP93XX watchdog, driver version "
+ WDT_VERSION "%s\n",
+ (__raw_readl(EP93XX_WDT_WATCHDOG) & 0x08)
+ ? " (nCS1 disable detected)" : "");
+
+ if (timeout < 1 || timeout > 3600) {
+ timeout = WDT_TIMEOUT;
+ printk(KERN_INFO PFX
+ "timeout value must be 1<=x<=3600, using %d\n",
+ timeout);
+ }
+
+ setup_timer(&timer, ep93xx_timer_ping, 1);
+ return err;
+}
+
+static void __exit ep93xx_wdt_exit(void)
+{
+ wdt_shutdown();
+ misc_deregister(&ep93xx_wdt_miscdev);
+}
+
+module_init(ep93xx_wdt_init);
+module_exit(ep93xx_wdt_exit);
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+MODULE_AUTHOR("Ray Lehtiniemi <rayl@mail.com>,"
+ "Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("EP93xx Watchdog");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(WDT_VERSION);
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Eurotech CPU-1220/1410/1420 on board WDT driver
+ *
+ * (c) Copyright 2001 Ascensit <support@ascensit.com>
+ * (c) Copyright 2001 Rodolfo Giometti <giometti@ascensit.com>
+ * (c) Copyright 2002 Rob Radez <rob@osinvestor.com>
+ *
+ * Based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>*
+ */
+
+/* Changelog:
+ *
+ * 2001 - Rodolfo Giometti
+ * Initial release
+ *
+ * 2002/04/25 - Rob Radez
+ * clean up #includes
+ * clean up locking
+ * make __setup param unique
+ * proper options in watchdog_info
+ * add WDIOC_GETSTATUS and WDIOC_SETOPTIONS ioctls
+ * add expect_close support
+ *
+ * 2002.05.30 - Joel Becker <joel.becker@oracle.com>
+ * Added Matt Domsch's nowayout module option.
+ */
+
+/*
+ * The eurotech CPU-1220/1410/1420's watchdog is a part
+ * of the on-board SUPER I/O device SMSC FDC 37B782.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+static unsigned long eurwdt_is_open;
+static int eurwdt_timeout;
+static char eur_expect_close;
+
+/*
+ * You must set these - there is no sane way to probe for this board.
+ * You can use eurwdt=x,y to set these now.
+ */
+
+static int io = 0x3f0;
+static int irq = 10;
+static char *ev = "int";
+
+#define WDT_TIMEOUT 60 /* 1 minute */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Some symbolic names
+ */
+
+#define WDT_CTRL_REG 0x30
+#define WDT_OUTPIN_CFG 0xe2
+#define WDT_EVENT_INT 0x00
+#define WDT_EVENT_REBOOT 0x08
+#define WDT_UNIT_SEL 0xf1
+#define WDT_UNIT_SECS 0x80
+#define WDT_TIMEOUT_VAL 0xf2
+#define WDT_TIMER_CFG 0xf3
+
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "Eurotech WDT io port (default=0x3f0)");
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "Eurotech WDT irq (default=10)");
+module_param(ev, charp, 0);
+MODULE_PARM_DESC(ev, "Eurotech WDT event type (default is `int')");
+
+
+/*
+ * Programming support
+ */
+
+static inline void eurwdt_write_reg(u8 index, u8 data)
+{
+ outb(index, io);
+ outb(data, io+1);
+}
+
+static inline void eurwdt_lock_chip(void)
+{
+ outb(0xaa, io);
+}
+
+static inline void eurwdt_unlock_chip(void)
+{
+ outb(0x55, io);
+ eurwdt_write_reg(0x07, 0x08); /* set the logical device */
+}
+
+static inline void eurwdt_set_timeout(int timeout)
+{
+ eurwdt_write_reg(WDT_TIMEOUT_VAL, (u8) timeout);
+}
+
+static inline void eurwdt_disable_timer(void)
+{
+ eurwdt_set_timeout(0);
+}
+
+static void eurwdt_activate_timer(void)
+{
+ eurwdt_disable_timer();
+ eurwdt_write_reg(WDT_CTRL_REG, 0x01); /* activate the WDT */
+ eurwdt_write_reg(WDT_OUTPIN_CFG, !strcmp("int", ev) ? WDT_EVENT_INT : WDT_EVENT_REBOOT);
+
+ /* Setting interrupt line */
+ if (irq == 2 || irq > 15 || irq < 0) {
+ printk(KERN_ERR ": invalid irq number\n");
+ irq = 0; /* if invalid we disable interrupt */
+ }
+ if (irq == 0)
+ printk(KERN_INFO ": interrupt disabled\n");
+
+ eurwdt_write_reg(WDT_TIMER_CFG, irq<<4);
+
+ eurwdt_write_reg(WDT_UNIT_SEL, WDT_UNIT_SECS); /* we use seconds */
+ eurwdt_set_timeout(0); /* the default timeout */
+}
+
+
+/*
+ * Kernel methods.
+ */
+
+static irqreturn_t eurwdt_interrupt(int irq, void *dev_id)
+{
+ printk(KERN_CRIT "timeout WDT timeout\n");
+
+#ifdef ONLY_TESTING
+ printk(KERN_CRIT "Would Reboot.\n");
+#else
+ printk(KERN_CRIT "Initiating system reboot.\n");
+ emergency_restart();
+#endif
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * eurwdt_ping:
+ *
+ * Reload counter one with the watchdog timeout.
+ */
+
+static void eurwdt_ping(void)
+{
+ /* Write the watchdog default value */
+ eurwdt_set_timeout(eurwdt_timeout);
+}
+
+/**
+ * eurwdt_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t eurwdt_write(struct file *file, const char __user *buf,
+size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ eur_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if(get_user(c, buf+i))
+ return -EFAULT;
+ if (c == 'V')
+ eur_expect_close = 42;
+ }
+ }
+ eurwdt_ping(); /* the default timeout */
+ }
+
+ return count;
+}
+
+/**
+ * eurwdt_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features.
+ */
+
+static int eurwdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "WDT Eurotech CPU-1220/1410",
+ };
+
+ int time;
+ int options, retval = -EINVAL;
+
+ switch(cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ eurwdt_ping();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (copy_from_user(&time, p, sizeof(int)))
+ return -EFAULT;
+
+ /* Sanity check */
+ if (time < 0 || time > 255)
+ return -EINVAL;
+
+ eurwdt_timeout = time;
+ eurwdt_set_timeout(time);
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(eurwdt_timeout, p);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, p))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ eurwdt_disable_timer();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ eurwdt_activate_timer();
+ eurwdt_ping();
+ retval = 0;
+ }
+ return retval;
+ }
+}
+
+/**
+ * eurwdt_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * The misc device has been opened. The watchdog device is single
+ * open and on opening we load the counter.
+ */
+
+static int eurwdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &eurwdt_is_open))
+ return -EBUSY;
+ eurwdt_timeout = WDT_TIMEOUT; /* initial timeout */
+ /* Activate the WDT */
+ eurwdt_activate_timer();
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * eurwdt_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int eurwdt_release(struct inode *inode, struct file *file)
+{
+ if (eur_expect_close == 42) {
+ eurwdt_disable_timer();
+ } else {
+ printk(KERN_CRIT "eurwdt: Unexpected close, not stopping watchdog!\n");
+ eurwdt_ping();
+ }
+ clear_bit(0, &eurwdt_is_open);
+ eur_expect_close = 0;
+ return 0;
+}
+
+/**
+ * eurwdt_notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int eurwdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the card off */
+ eurwdt_disable_timer();
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+
+static const struct file_operations eurwdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = eurwdt_write,
+ .ioctl = eurwdt_ioctl,
+ .open = eurwdt_open,
+ .release = eurwdt_release,
+};
+
+static struct miscdevice eurwdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &eurwdt_fops,
+};
+
+/*
+ * The WDT card needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block eurwdt_notifier = {
+ .notifier_call = eurwdt_notify_sys,
+};
+
+/**
+ * cleanup_module:
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static void __exit eurwdt_exit(void)
+{
+ eurwdt_lock_chip();
+
+ misc_deregister(&eurwdt_miscdev);
+
+ unregister_reboot_notifier(&eurwdt_notifier);
+ release_region(io, 2);
+ free_irq(irq, NULL);
+}
+
+/**
+ * eurwdt_init:
+ *
+ * Set up the WDT watchdog board. After grabbing the resources
+ * we require we need also to unlock the device.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init eurwdt_init(void)
+{
+ int ret;
+
+ ret = request_irq(irq, eurwdt_interrupt, IRQF_DISABLED, "eurwdt", NULL);
+ if(ret) {
+ printk(KERN_ERR "eurwdt: IRQ %d is not free.\n", irq);
+ goto out;
+ }
+
+ if (!request_region(io, 2, "eurwdt")) {
+ printk(KERN_ERR "eurwdt: IO %X is not free.\n", io);
+ ret = -EBUSY;
+ goto outirq;
+ }
+
+ ret = register_reboot_notifier(&eurwdt_notifier);
+ if (ret) {
+ printk(KERN_ERR "eurwdt: can't register reboot notifier (err=%d)\n", ret);
+ goto outreg;
+ }
+
+ ret = misc_register(&eurwdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "eurwdt: can't misc_register on minor=%d\n",
+ WATCHDOG_MINOR);
+ goto outreboot;
+ }
+
+ eurwdt_unlock_chip();
+
+ ret = 0;
+ printk(KERN_INFO "Eurotech WDT driver 0.01 at %X (Interrupt %d)"
+ " - timeout event: %s\n",
+ io, irq, (!strcmp("int", ev) ? "int" : "reboot"));
+
+out:
+ return ret;
+
+outreboot:
+ unregister_reboot_notifier(&eurwdt_notifier);
+
+outreg:
+ release_region(io, 2);
+
+outirq:
+ free_irq(irq, NULL);
+ goto out;
+}
+
+module_init(eurwdt_init);
+module_exit(eurwdt_exit);
+
+MODULE_AUTHOR("Rodolfo Giometti");
+MODULE_DESCRIPTION("Driver for Eurotech CPU-1220/1410 on board watchdog");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * i6300esb: Watchdog timer driver for Intel 6300ESB chipset
+ *
+ * (c) Copyright 2004 Google Inc.
+ * (c) Copyright 2005 David Härdeman <david@2gen.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * based on i810-tco.c which is in turn based on softdog.c
+ *
+ * The timer is implemented in the following I/O controller hubs:
+ * (See the intel documentation on http://developer.intel.com.)
+ * 6300ESB chip : document number 300641-003
+ *
+ * 2004YYZZ Ross Biro
+ * Initial version 0.01
+ * 2004YYZZ Ross Biro
+ * Version 0.02
+ * 20050210 David Härdeman <david@2gen.com>
+ * Ported driver to kernel 2.6
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/* Module and version information */
+#define ESB_VERSION "0.03"
+#define ESB_MODULE_NAME "i6300ESB timer"
+#define ESB_DRIVER_NAME ESB_MODULE_NAME ", v" ESB_VERSION
+#define PFX ESB_MODULE_NAME ": "
+
+/* PCI configuration registers */
+#define ESB_CONFIG_REG 0x60 /* Config register */
+#define ESB_LOCK_REG 0x68 /* WDT lock register */
+
+/* Memory mapped registers */
+#define ESB_TIMER1_REG BASEADDR + 0x00 /* Timer1 value after each reset */
+#define ESB_TIMER2_REG BASEADDR + 0x04 /* Timer2 value after each reset */
+#define ESB_GINTSR_REG BASEADDR + 0x08 /* General Interrupt Status Register */
+#define ESB_RELOAD_REG BASEADDR + 0x0c /* Reload register */
+
+/* Lock register bits */
+#define ESB_WDT_FUNC ( 0x01 << 2 ) /* Watchdog functionality */
+#define ESB_WDT_ENABLE ( 0x01 << 1 ) /* Enable WDT */
+#define ESB_WDT_LOCK ( 0x01 << 0 ) /* Lock (nowayout) */
+
+/* Config register bits */
+#define ESB_WDT_REBOOT ( 0x01 << 5 ) /* Enable reboot on timeout */
+#define ESB_WDT_FREQ ( 0x01 << 2 ) /* Decrement frequency */
+#define ESB_WDT_INTTYPE ( 0x11 << 0 ) /* Interrupt type on timer1 timeout */
+
+/* Reload register bits */
+#define ESB_WDT_RELOAD ( 0x01 << 8 ) /* prevent timeout */
+
+/* Magic constants */
+#define ESB_UNLOCK1 0x80 /* Step 1 to unlock reset registers */
+#define ESB_UNLOCK2 0x86 /* Step 2 to unlock reset registers */
+
+/* internal variables */
+static void __iomem *BASEADDR;
+static spinlock_t esb_lock; /* Guards the hardware */
+static unsigned long timer_alive;
+static struct pci_dev *esb_pci;
+static unsigned short triggered; /* The status of the watchdog upon boot */
+static char esb_expect_close;
+
+/* module parameters */
+#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat (1<heartbeat<2*1023) */
+static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<heartbeat<2046, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Some i6300ESB specific functions
+ */
+
+/*
+ * Prepare for reloading the timer by unlocking the proper registers.
+ * This is performed by first writing 0x80 followed by 0x86 to the
+ * reload register. After this the appropriate registers can be written
+ * to once before they need to be unlocked again.
+ */
+static inline void esb_unlock_registers(void) {
+ writeb(ESB_UNLOCK1, ESB_RELOAD_REG);
+ writeb(ESB_UNLOCK2, ESB_RELOAD_REG);
+}
+
+static void esb_timer_start(void)
+{
+ u8 val;
+
+ /* Enable or Enable + Lock? */
+ val = 0x02 | (nowayout ? 0x01 : 0x00);
+
+ pci_write_config_byte(esb_pci, ESB_LOCK_REG, val);
+}
+
+static int esb_timer_stop(void)
+{
+ u8 val;
+
+ spin_lock(&esb_lock);
+ /* First, reset timers as suggested by the docs */
+ esb_unlock_registers();
+ writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
+ /* Then disable the WDT */
+ pci_write_config_byte(esb_pci, ESB_LOCK_REG, 0x0);
+ pci_read_config_byte(esb_pci, ESB_LOCK_REG, &val);
+ spin_unlock(&esb_lock);
+
+ /* Returns 0 if the timer was disabled, non-zero otherwise */
+ return (val & 0x01);
+}
+
+static void esb_timer_keepalive(void)
+{
+ spin_lock(&esb_lock);
+ esb_unlock_registers();
+ writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
+ /* FIXME: Do we need to flush anything here? */
+ spin_unlock(&esb_lock);
+}
+
+static int esb_timer_set_heartbeat(int time)
+{
+ u32 val;
+
+ if (time < 0x1 || time > (2 * 0x03ff))
+ return -EINVAL;
+
+ spin_lock(&esb_lock);
+
+ /* We shift by 9, so if we are passed a value of 1 sec,
+ * val will be 1 << 9 = 512, then write that to two
+ * timers => 2 * 512 = 1024 (which is decremented at 1KHz)
+ */
+ val = time << 9;
+
+ /* Write timer 1 */
+ esb_unlock_registers();
+ writel(val, ESB_TIMER1_REG);
+
+ /* Write timer 2 */
+ esb_unlock_registers();
+ writel(val, ESB_TIMER2_REG);
+
+ /* Reload */
+ esb_unlock_registers();
+ writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
+
+ /* FIXME: Do we need to flush everything out? */
+
+ /* Done */
+ heartbeat = time;
+ spin_unlock(&esb_lock);
+ return 0;
+}
+
+static int esb_timer_read (void)
+{
+ u32 count;
+
+ /* This isn't documented, and doesn't take into
+ * acount which stage is running, but it looks
+ * like a 20 bit count down, so we might as well report it.
+ */
+ pci_read_config_dword(esb_pci, 0x64, &count);
+ return (int)count;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int esb_open (struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &timer_alive))
+ return -EBUSY;
+
+ /* Reload and activate timer */
+ esb_timer_keepalive ();
+ esb_timer_start ();
+
+ return nonseekable_open(inode, file);
+}
+
+static int esb_release (struct inode *inode, struct file *file)
+{
+ /* Shut off the timer. */
+ if (esb_expect_close == 42) {
+ esb_timer_stop ();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ esb_timer_keepalive ();
+ }
+ clear_bit(0, &timer_alive);
+ esb_expect_close = 0;
+ return 0;
+}
+
+static ssize_t esb_write (struct file *file, const char __user *data,
+ size_t len, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ esb_expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if(get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ esb_expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ esb_timer_keepalive ();
+ }
+ return len;
+}
+
+static int esb_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_options, retval = -EINVAL;
+ int new_heartbeat;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = ESB_MODULE_NAME,
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof (ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user (esb_timer_read(), p);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user (triggered, p);
+
+ case WDIOC_KEEPALIVE:
+ esb_timer_keepalive ();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user (new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ esb_timer_stop ();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ esb_timer_keepalive ();
+ esb_timer_start ();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ case WDIOC_SETTIMEOUT:
+ {
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (esb_timer_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ esb_timer_keepalive ();
+ /* Fall */
+ }
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * Notify system
+ */
+
+static int esb_notify_sys (struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the WDT off */
+ esb_timer_stop ();
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations esb_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = esb_write,
+ .ioctl = esb_ioctl,
+ .open = esb_open,
+ .release = esb_release,
+};
+
+static struct miscdevice esb_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &esb_fops,
+};
+
+static struct notifier_block esb_notifier = {
+ .notifier_call = esb_notify_sys,
+};
+
+/*
+ * Data for PCI driver interface
+ *
+ * This data only exists for exporting the supported
+ * PCI ids via MODULE_DEVICE_TABLE. We do not actually
+ * register a pci_driver, because someone else might one day
+ * want to register another driver on the same PCI id.
+ */
+static struct pci_device_id esb_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_9), },
+ { 0, }, /* End of list */
+};
+MODULE_DEVICE_TABLE (pci, esb_pci_tbl);
+
+/*
+ * Init & exit routines
+ */
+
+static unsigned char __init esb_getdevice (void)
+{
+ u8 val1;
+ unsigned short val2;
+
+ struct pci_dev *dev = NULL;
+ /*
+ * Find the PCI device
+ */
+
+ for_each_pci_dev(dev) {
+ if (pci_match_id(esb_pci_tbl, dev)) {
+ esb_pci = dev;
+ break;
+ }
+ }
+
+ if (esb_pci) {
+ if (pci_enable_device(esb_pci)) {
+ printk (KERN_ERR PFX "failed to enable device\n");
+ goto err_devput;
+ }
+
+ if (pci_request_region(esb_pci, 0, ESB_MODULE_NAME)) {
+ printk (KERN_ERR PFX "failed to request region\n");
+ goto err_disable;
+ }
+
+ BASEADDR = ioremap(pci_resource_start(esb_pci, 0),
+ pci_resource_len(esb_pci, 0));
+ if (BASEADDR == NULL) {
+ /* Something's wrong here, BASEADDR has to be set */
+ printk (KERN_ERR PFX "failed to get BASEADDR\n");
+ goto err_release;
+ }
+
+ /*
+ * The watchdog has two timers, it can be setup so that the
+ * expiry of timer1 results in an interrupt and the expiry of
+ * timer2 results in a reboot. We set it to not generate
+ * any interrupts as there is not much we can do with it
+ * right now.
+ *
+ * We also enable reboots and set the timer frequency to
+ * the PCI clock divided by 2^15 (approx 1KHz).
+ */
+ pci_write_config_word(esb_pci, ESB_CONFIG_REG, 0x0003);
+
+ /* Check that the WDT isn't already locked */
+ pci_read_config_byte(esb_pci, ESB_LOCK_REG, &val1);
+ if (val1 & ESB_WDT_LOCK)
+ printk (KERN_WARNING PFX "nowayout already set\n");
+
+ /* Set the timer to watchdog mode and disable it for now */
+ pci_write_config_byte(esb_pci, ESB_LOCK_REG, 0x00);
+
+ /* Check if the watchdog was previously triggered */
+ esb_unlock_registers();
+ val2 = readw(ESB_RELOAD_REG);
+ triggered = (val2 & (0x01 << 9) >> 9);
+
+ /* Reset trigger flag and timers */
+ esb_unlock_registers();
+ writew((0x11 << 8), ESB_RELOAD_REG);
+
+ /* Done */
+ return 1;
+
+err_release:
+ pci_release_region(esb_pci, 0);
+err_disable:
+ pci_disable_device(esb_pci);
+err_devput:
+ pci_dev_put(esb_pci);
+ }
+ return 0;
+}
+
+static int __init watchdog_init (void)
+{
+ int ret;
+
+ spin_lock_init(&esb_lock);
+
+ /* Check whether or not the hardware watchdog is there */
+ if (!esb_getdevice () || esb_pci == NULL)
+ return -ENODEV;
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (esb_timer_set_heartbeat (heartbeat)) {
+ esb_timer_set_heartbeat (WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX "heartbeat value must be 1<heartbeat<2046, using %d\n",
+ heartbeat);
+ }
+
+ ret = register_reboot_notifier(&esb_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto err_unmap;
+ }
+
+ ret = misc_register(&esb_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_notifier;
+ }
+
+ esb_timer_stop ();
+
+ printk (KERN_INFO PFX "initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
+ BASEADDR, heartbeat, nowayout);
+
+ return 0;
+
+err_notifier:
+ unregister_reboot_notifier(&esb_notifier);
+err_unmap:
+ iounmap(BASEADDR);
+/* err_release: */
+ pci_release_region(esb_pci, 0);
+/* err_disable: */
+ pci_disable_device(esb_pci);
+/* err_devput: */
+ pci_dev_put(esb_pci);
+ return ret;
+}
+
+static void __exit watchdog_cleanup (void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ esb_timer_stop ();
+
+ /* Deregister */
+ misc_deregister(&esb_miscdev);
+ unregister_reboot_notifier(&esb_notifier);
+ iounmap(BASEADDR);
+ pci_release_region(esb_pci, 0);
+ pci_disable_device(esb_pci);
+ pci_dev_put(esb_pci);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_cleanup);
+
+MODULE_AUTHOR("Ross Biro and David Härdeman");
+MODULE_DESCRIPTION("Watchdog driver for Intel 6300ESB chipsets");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * intel TCO vendor specific watchdog driver support
+ *
+ * (c) Copyright 2006 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+/* Module and version information */
+#define DRV_NAME "iTCO_vendor_support"
+#define DRV_VERSION "1.01"
+#define DRV_RELDATE "11-Nov-2006"
+#define PFX DRV_NAME ": "
+
+/* Includes */
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/ioport.h> /* For io-port access */
+
+#include <asm/io.h> /* For inb/outb/... */
+
+/* iTCO defines */
+#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */
+#define TCOBASE acpibase + 0x60 /* TCO base address */
+#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
+
+/* List of vendor support modes */
+#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
+#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
+
+static int vendorsupport = 0;
+module_param(vendorsupport, int, 0);
+MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+");
+
+/*
+ * Vendor Specific Support
+ */
+
+/*
+ * Vendor Support: 1
+ * Board: Super Micro Computer Inc. 370SSE+-OEM1/P3TSSE
+ * iTCO chipset: ICH2
+ *
+ * Code contributed by: R. Seretny <lkpatches@paypc.com>
+ * Documentation obtained by R. Seretny from SuperMicro Technical Support
+ *
+ * To enable Watchdog function:
+ * BIOS setup -> Power -> TCO Logic SMI Enable -> Within5Minutes
+ * This setting enables SMI to clear the watchdog expired flag.
+ * If BIOS or CPU fail which may cause SMI hang, then system will
+ * reboot. When application starts to use watchdog function,
+ * application has to take over the control from SMI.
+ *
+ * For P3TSSE, J36 jumper needs to be removed to enable the Watchdog
+ * function.
+ *
+ * Note: The system will reboot when Expire Flag is set TWICE.
+ * So, if the watchdog timer is 20 seconds, then the maximum hang
+ * time is about 40 seconds, and the minimum hang time is about
+ * 20.6 seconds.
+ */
+
+static void supermicro_old_pre_start(unsigned long acpibase)
+{
+ unsigned long val32;
+
+ val32 = inl(SMI_EN);
+ val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
+ outl(val32, SMI_EN); /* Needed to activate watchdog */
+}
+
+static void supermicro_old_pre_stop(unsigned long acpibase)
+{
+ unsigned long val32;
+
+ val32 = inl(SMI_EN);
+ val32 &= 0x00002000; /* Turn on SMI clearing watchdog */
+ outl(val32, SMI_EN); /* Needed to deactivate watchdog */
+}
+
+static void supermicro_old_pre_keepalive(unsigned long acpibase)
+{
+ /* Reload TCO Timer (done in iTCO_wdt_keepalive) + */
+ /* Clear "Expire Flag" (Bit 3 of TC01_STS register) */
+ outb(0x08, TCO1_STS);
+}
+
+/*
+ * Vendor Support: 2
+ * Board: Super Micro Computer Inc. P4SBx, P4DPx
+ * iTCO chipset: ICH4
+ *
+ * Code contributed by: R. Seretny <lkpatches@paypc.com>
+ * Documentation obtained by R. Seretny from SuperMicro Technical Support
+ *
+ * To enable Watchdog function:
+ * 1. BIOS
+ * For P4SBx:
+ * BIOS setup -> Advanced -> Integrated Peripherals -> Watch Dog Feature
+ * For P4DPx:
+ * BIOS setup -> Advanced -> I/O Device Configuration -> Watch Dog
+ * This setting enables or disables Watchdog function. When enabled, the
+ * default watchdog timer is set to be 5 minutes (about 4’35”). It is
+ * enough to load and run the OS. The application (service or driver) has
+ * to take over the control once OS is running up and before watchdog
+ * expires.
+ *
+ * 2. JUMPER
+ * For P4SBx: JP39
+ * For P4DPx: JP37
+ * This jumper is used for safety. Closed is enabled. This jumper
+ * prevents user enables watchdog in BIOS by accident.
+ *
+ * To enable Watch Dog function, both BIOS and JUMPER must be enabled.
+ *
+ * The documentation lists motherboards P4SBx and P4DPx series as of
+ * 20-March-2002. However, this code works flawlessly with much newer
+ * motherboards, such as my X6DHR-8G2 (SuperServer 6014H-82).
+ *
+ * The original iTCO driver as written does not actually reset the
+ * watchdog timer on these machines, as a result they reboot after five
+ * minutes.
+ *
+ * NOTE: You may leave the Watchdog function disabled in the SuperMicro
+ * BIOS to avoid a "boot-race"... This driver will enable watchdog
+ * functionality even if it's disabled in the BIOS once the /dev/watchdog
+ * file is opened.
+ */
+
+/* I/O Port's */
+#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
+#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
+
+/* Control Register's */
+#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
+#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
+
+#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
+
+#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
+
+#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
+
+#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
+ /* (Bit 3: 0 = seconds, 1 = minutes */
+
+#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
+
+#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
+ /* Bit 6: timer is reset by kbd interrupt */
+ /* Bit 7: timer is reset by mouse interrupt */
+
+static void supermicro_new_unlock_watchdog(void)
+{
+ outb(SM_WATCHPAGE, SM_REGINDEX); /* Write 0x87 to port 0x2e twice */
+ outb(SM_WATCHPAGE, SM_REGINDEX);
+
+ outb(SM_CTLPAGESW, SM_REGINDEX); /* Switch to watchdog control page */
+ outb(SM_CTLPAGE, SM_DATAIO);
+}
+
+static void supermicro_new_lock_watchdog(void)
+{
+ outb(SM_ENDWATCH, SM_REGINDEX);
+}
+
+static void supermicro_new_pre_start(unsigned int heartbeat)
+{
+ unsigned int val;
+
+ supermicro_new_unlock_watchdog();
+
+ /* Watchdog timer setting needs to be in seconds*/
+ outb(SM_COUNTMODE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0xF7;
+ outb(val, SM_DATAIO);
+
+ /* Write heartbeat interval to WDOG */
+ outb (SM_WATCHTIMER, SM_REGINDEX);
+ outb((heartbeat & 255), SM_DATAIO);
+
+ /* Make sure keyboard/mouse interrupts don't interfere */
+ outb(SM_RESETCONTROL, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0x3f;
+ outb(val, SM_DATAIO);
+
+ /* enable watchdog by setting bit 0 of Watchdog Enable to 1 */
+ outb(SM_WATCHENABLE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val |= 0x01;
+ outb(val, SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+static void supermicro_new_pre_stop(void)
+{
+ unsigned int val;
+
+ supermicro_new_unlock_watchdog();
+
+ /* disable watchdog by setting bit 0 of Watchdog Enable to 0 */
+ outb(SM_WATCHENABLE, SM_REGINDEX);
+ val = inb(SM_DATAIO);
+ val &= 0xFE;
+ outb(val, SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+static void supermicro_new_pre_set_heartbeat(unsigned int heartbeat)
+{
+ supermicro_new_unlock_watchdog();
+
+ /* reset watchdog timeout to heartveat value */
+ outb(SM_WATCHTIMER, SM_REGINDEX);
+ outb((heartbeat & 255), SM_DATAIO);
+
+ supermicro_new_lock_watchdog();
+}
+
+/*
+ * Generic Support Functions
+ */
+
+void iTCO_vendor_pre_start(unsigned long acpibase,
+ unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_start(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_start(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_start);
+
+void iTCO_vendor_pre_stop(unsigned long acpibase)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_stop(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_stop();
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_stop);
+
+void iTCO_vendor_pre_keepalive(unsigned long acpibase, unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_OLD_BOARD)
+ supermicro_old_pre_keepalive(acpibase);
+ else if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_set_heartbeat(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_keepalive);
+
+void iTCO_vendor_pre_set_heartbeat(unsigned int heartbeat)
+{
+ if (vendorsupport == SUPERMICRO_NEW_BOARD)
+ supermicro_new_pre_set_heartbeat(heartbeat);
+}
+EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
+
+int iTCO_vendor_check_noreboot_on(void)
+{
+ switch(vendorsupport) {
+ case SUPERMICRO_OLD_BOARD:
+ return 0;
+ default:
+ return 1;
+ }
+}
+EXPORT_SYMBOL(iTCO_vendor_check_noreboot_on);
+
+static int __init iTCO_vendor_init_module(void)
+{
+ printk (KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
+ return 0;
+}
+
+static void __exit iTCO_vendor_exit_module(void)
+{
+ printk (KERN_INFO PFX "Module Unloaded\n");
+}
+
+module_init(iTCO_vendor_init_module);
+module_exit(iTCO_vendor_exit_module);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>, R. Seretny <lkpatches@paypc.com>");
+MODULE_DESCRIPTION("Intel TCO Vendor Specific WatchDog Timer Driver Support");
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE("GPL");
+
--- /dev/null
+/*
+ * intel TCO Watchdog Driver (Used in i82801 and i6300ESB chipsets)
+ *
+ * (c) Copyright 2006-2007 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ * The TCO watchdog is implemented in the following I/O controller hubs:
+ * (See the intel documentation on http://developer.intel.com.)
+ * 82801AA (ICH) : document number 290655-003, 290677-014,
+ * 82801AB (ICHO) : document number 290655-003, 290677-014,
+ * 82801BA (ICH2) : document number 290687-002, 298242-027,
+ * 82801BAM (ICH2-M) : document number 290687-002, 298242-027,
+ * 82801CA (ICH3-S) : document number 290733-003, 290739-013,
+ * 82801CAM (ICH3-M) : document number 290716-001, 290718-007,
+ * 82801DB (ICH4) : document number 290744-001, 290745-020,
+ * 82801DBM (ICH4-M) : document number 252337-001, 252663-005,
+ * 82801E (C-ICH) : document number 273599-001, 273645-002,
+ * 82801EB (ICH5) : document number 252516-001, 252517-003,
+ * 82801ER (ICH5R) : document number 252516-001, 252517-003,
+ * 82801FB (ICH6) : document number 301473-002, 301474-007,
+ * 82801FR (ICH6R) : document number 301473-002, 301474-007,
+ * 82801FBM (ICH6-M) : document number 301473-002, 301474-007,
+ * 82801FW (ICH6W) : document number 301473-001, 301474-007,
+ * 82801FRW (ICH6RW) : document number 301473-001, 301474-007,
+ * 82801GB (ICH7) : document number 307013-002, 307014-009,
+ * 82801GR (ICH7R) : document number 307013-002, 307014-009,
+ * 82801GDH (ICH7DH) : document number 307013-002, 307014-009,
+ * 82801GBM (ICH7-M) : document number 307013-002, 307014-009,
+ * 82801GHM (ICH7-M DH) : document number 307013-002, 307014-009,
+ * 82801HB (ICH8) : document number 313056-002, 313057-004,
+ * 82801HR (ICH8R) : document number 313056-002, 313057-004,
+ * 82801HH (ICH8DH) : document number 313056-002, 313057-004,
+ * 82801HO (ICH8DO) : document number 313056-002, 313057-004,
+ * 82801IB (ICH9) : document number 316972-001, 316973-001,
+ * 82801IR (ICH9R) : document number 316972-001, 316973-001,
+ * 82801IH (ICH9DH) : document number 316972-001, 316973-001,
+ * 6300ESB (6300ESB) : document number 300641-003, 300884-010,
+ * 631xESB (631xESB) : document number 313082-001, 313075-005,
+ * 632xESB (632xESB) : document number 313082-001, 313075-005
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+/* Module and version information */
+#define DRV_NAME "iTCO_wdt"
+#define DRV_VERSION "1.02"
+#define DRV_RELDATE "26-Jul-2007"
+#define PFX DRV_NAME ": "
+
+/* Includes */
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/fs.h> /* For file operations */
+#include <linux/platform_device.h> /* For platform_driver framework */
+#include <linux/pci.h> /* For pci functions */
+#include <linux/ioport.h> /* For io-port access */
+#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
+
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+#include <asm/io.h> /* For inb/outb/... */
+
+/* TCO related info */
+enum iTCO_chipsets {
+ TCO_ICH = 0, /* ICH */
+ TCO_ICH0, /* ICH0 */
+ TCO_ICH2, /* ICH2 */
+ TCO_ICH2M, /* ICH2-M */
+ TCO_ICH3, /* ICH3-S */
+ TCO_ICH3M, /* ICH3-M */
+ TCO_ICH4, /* ICH4 */
+ TCO_ICH4M, /* ICH4-M */
+ TCO_CICH, /* C-ICH */
+ TCO_ICH5, /* ICH5 & ICH5R */
+ TCO_6300ESB, /* 6300ESB */
+ TCO_ICH6, /* ICH6 & ICH6R */
+ TCO_ICH6M, /* ICH6-M */
+ TCO_ICH6W, /* ICH6W & ICH6RW */
+ TCO_ICH7, /* ICH7 & ICH7R */
+ TCO_ICH7M, /* ICH7-M */
+ TCO_ICH7MDH, /* ICH7-M DH */
+ TCO_ICH8, /* ICH8 & ICH8R */
+ TCO_ICH8DH, /* ICH8DH */
+ TCO_ICH8DO, /* ICH8DO */
+ TCO_ICH9, /* ICH9 */
+ TCO_ICH9R, /* ICH9R */
+ TCO_ICH9DH, /* ICH9DH */
+ TCO_631XESB, /* 631xESB/632xESB */
+};
+
+static struct {
+ char *name;
+ unsigned int iTCO_version;
+} iTCO_chipset_info[] __devinitdata = {
+ {"ICH", 1},
+ {"ICH0", 1},
+ {"ICH2", 1},
+ {"ICH2-M", 1},
+ {"ICH3-S", 1},
+ {"ICH3-M", 1},
+ {"ICH4", 1},
+ {"ICH4-M", 1},
+ {"C-ICH", 1},
+ {"ICH5 or ICH5R", 1},
+ {"6300ESB", 1},
+ {"ICH6 or ICH6R", 2},
+ {"ICH6-M", 2},
+ {"ICH6W or ICH6RW", 2},
+ {"ICH7 or ICH7R", 2},
+ {"ICH7-M", 2},
+ {"ICH7-M DH", 2},
+ {"ICH8 or ICH8R", 2},
+ {"ICH8DH", 2},
+ {"ICH8DO", 2},
+ {"ICH9", 2},
+ {"ICH9R", 2},
+ {"ICH9DH", 2},
+ {"631xESB/632xESB", 2},
+ {NULL,0}
+};
+
+/*
+ * This data only exists for exporting the supported PCI ids
+ * via MODULE_DEVICE_TABLE. We do not actually register a
+ * pci_driver, because the I/O Controller Hub has also other
+ * functions that probably will be registered by other drivers.
+ */
+static struct pci_device_id iTCO_wdt_pci_tbl[] = {
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH0 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_10, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH2M },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH3M },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH4M },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801E_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_CICH },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH5 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_6300ESB },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6M },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH6W },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7M },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH7MDH },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8 },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DH },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH8DO },
+ { PCI_VENDOR_ID_INTEL, 0x2918, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9 },
+ { PCI_VENDOR_ID_INTEL, 0x2916, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9R },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_ICH9DH },
+ { PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2671, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2672, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2673, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2674, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2675, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2676, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2677, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2678, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x2679, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267c, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { PCI_VENDOR_ID_INTEL, 0x267f, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TCO_631XESB },
+ { 0, }, /* End of list */
+};
+MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
+
+/* Address definitions for the TCO */
+#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60 /* TCO base address */
+#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30 /* SMI Control and Enable Register */
+
+#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Current Value */
+#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */
+#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
+#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
+#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
+#define TCO2_STS TCOBASE + 0x06 /* TCO2 Status Register */
+#define TCO1_CNT TCOBASE + 0x08 /* TCO1 Control Register */
+#define TCO2_CNT TCOBASE + 0x0a /* TCO2 Control Register */
+#define TCOv2_TMR TCOBASE + 0x12 /* TCOv2 Timer Initial Value */
+
+/* internal variables */
+static unsigned long is_active;
+static char expect_release;
+static struct { /* this is private data for the iTCO_wdt device */
+ unsigned int iTCO_version; /* TCO version/generation */
+ unsigned long ACPIBASE; /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
+ unsigned long __iomem *gcs; /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2) */
+ spinlock_t io_lock; /* the lock for io operations */
+ struct pci_dev *pdev; /* the PCI-device */
+} iTCO_wdt_private;
+
+static struct platform_device *iTCO_wdt_platform_device; /* the watchdog platform device */
+
+/* module parameters */
+#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
+static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/* iTCO Vendor Specific Support hooks */
+#ifdef CONFIG_ITCO_VENDOR_SUPPORT
+extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_stop(unsigned long);
+extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
+extern int iTCO_vendor_check_noreboot_on(void);
+#else
+#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
+#define iTCO_vendor_pre_stop(acpibase) {}
+#define iTCO_vendor_pre_keepalive(acpibase,heartbeat) {}
+#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
+#define iTCO_vendor_check_noreboot_on() 1 /* 1=check noreboot; 0=don't check */
+#endif
+
+/*
+ * Some TCO specific functions
+ */
+
+static inline unsigned int seconds_to_ticks(int seconds)
+{
+ /* the internal timer is stored as ticks which decrement
+ * every 0.6 seconds */
+ return (seconds * 10) / 6;
+}
+
+static void iTCO_wdt_set_NO_REBOOT_bit(void)
+{
+ u32 val32;
+
+ /* Set the NO_REBOOT bit: this disables reboots */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ val32 = readl(iTCO_wdt_private.gcs);
+ val32 |= 0x00000020;
+ writel(val32, iTCO_wdt_private.gcs);
+ } else if (iTCO_wdt_private.iTCO_version == 1) {
+ pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
+ val32 |= 0x00000002;
+ pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32);
+ }
+}
+
+static int iTCO_wdt_unset_NO_REBOOT_bit(void)
+{
+ int ret = 0;
+ u32 val32;
+
+ /* Unset the NO_REBOOT bit: this enables reboots */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ val32 = readl(iTCO_wdt_private.gcs);
+ val32 &= 0xffffffdf;
+ writel(val32, iTCO_wdt_private.gcs);
+
+ val32 = readl(iTCO_wdt_private.gcs);
+ if (val32 & 0x00000020)
+ ret = -EIO;
+ } else if (iTCO_wdt_private.iTCO_version == 1) {
+ pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
+ val32 &= 0xfffffffd;
+ pci_write_config_dword(iTCO_wdt_private.pdev, 0xd4, val32);
+
+ pci_read_config_dword(iTCO_wdt_private.pdev, 0xd4, &val32);
+ if (val32 & 0x00000002)
+ ret = -EIO;
+ }
+
+ return ret; /* returns: 0 = OK, -EIO = Error */
+}
+
+static int iTCO_wdt_start(void)
+{
+ unsigned int val;
+
+ spin_lock(&iTCO_wdt_private.io_lock);
+
+ iTCO_vendor_pre_start(iTCO_wdt_private.ACPIBASE, heartbeat);
+
+ /* disable chipset's NO_REBOOT bit */
+ if (iTCO_wdt_unset_NO_REBOOT_bit()) {
+ printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
+ return -EIO;
+ }
+
+ /* Bit 11: TCO Timer Halt -> 0 = The TCO timer is enabled to count */
+ val = inw(TCO1_CNT);
+ val &= 0xf7ff;
+ outw(val, TCO1_CNT);
+ val = inw(TCO1_CNT);
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ if (val & 0x0800)
+ return -1;
+ return 0;
+}
+
+static int iTCO_wdt_stop(void)
+{
+ unsigned int val;
+
+ spin_lock(&iTCO_wdt_private.io_lock);
+
+ iTCO_vendor_pre_stop(iTCO_wdt_private.ACPIBASE);
+
+ /* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
+ val = inw(TCO1_CNT);
+ val |= 0x0800;
+ outw(val, TCO1_CNT);
+ val = inw(TCO1_CNT);
+
+ /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
+ iTCO_wdt_set_NO_REBOOT_bit();
+
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ if ((val & 0x0800) == 0)
+ return -1;
+ return 0;
+}
+
+static int iTCO_wdt_keepalive(void)
+{
+ spin_lock(&iTCO_wdt_private.io_lock);
+
+ iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat);
+
+ /* Reload the timer by writing to the TCO Timer Counter register */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ outw(0x01, TCO_RLD);
+ } else if (iTCO_wdt_private.iTCO_version == 1) {
+ outb(0x01, TCO_RLD);
+ }
+
+ spin_unlock(&iTCO_wdt_private.io_lock);
+ return 0;
+}
+
+static int iTCO_wdt_set_heartbeat(int t)
+{
+ unsigned int val16;
+ unsigned char val8;
+ unsigned int tmrval;
+
+ tmrval = seconds_to_ticks(t);
+ /* from the specs: */
+ /* "Values of 0h-3h are ignored and should not be attempted" */
+ if (tmrval < 0x04)
+ return -EINVAL;
+ if (((iTCO_wdt_private.iTCO_version == 2) && (tmrval > 0x3ff)) ||
+ ((iTCO_wdt_private.iTCO_version == 1) && (tmrval > 0x03f)))
+ return -EINVAL;
+
+ iTCO_vendor_pre_set_heartbeat(tmrval);
+
+ /* Write new heartbeat to watchdog */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ spin_lock(&iTCO_wdt_private.io_lock);
+ val16 = inw(TCOv2_TMR);
+ val16 &= 0xfc00;
+ val16 |= tmrval;
+ outw(val16, TCOv2_TMR);
+ val16 = inw(TCOv2_TMR);
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ if ((val16 & 0x3ff) != tmrval)
+ return -EINVAL;
+ } else if (iTCO_wdt_private.iTCO_version == 1) {
+ spin_lock(&iTCO_wdt_private.io_lock);
+ val8 = inb(TCOv1_TMR);
+ val8 &= 0xc0;
+ val8 |= (tmrval & 0xff);
+ outb(val8, TCOv1_TMR);
+ val8 = inb(TCOv1_TMR);
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ if ((val8 & 0x3f) != tmrval)
+ return -EINVAL;
+ }
+
+ heartbeat = t;
+ return 0;
+}
+
+static int iTCO_wdt_get_timeleft (int *time_left)
+{
+ unsigned int val16;
+ unsigned char val8;
+
+ /* read the TCO Timer */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ spin_lock(&iTCO_wdt_private.io_lock);
+ val16 = inw(TCO_RLD);
+ val16 &= 0x3ff;
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ *time_left = (val16 * 6) / 10;
+ } else if (iTCO_wdt_private.iTCO_version == 1) {
+ spin_lock(&iTCO_wdt_private.io_lock);
+ val8 = inb(TCO_RLD);
+ val8 &= 0x3f;
+ spin_unlock(&iTCO_wdt_private.io_lock);
+
+ *time_left = (val8 * 6) / 10;
+ } else
+ return -EINVAL;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int iTCO_wdt_open (struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &is_active))
+ return -EBUSY;
+
+ /*
+ * Reload and activate timer
+ */
+ iTCO_wdt_keepalive();
+ iTCO_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int iTCO_wdt_release (struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ */
+ if (expect_release == 42) {
+ iTCO_wdt_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ iTCO_wdt_keepalive();
+ }
+ clear_bit(0, &is_active);
+ expect_release = 0;
+ return 0;
+}
+
+static ssize_t iTCO_wdt_write (struct file *file, const char __user *data,
+ size_t len, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ expect_release = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_release = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ iTCO_wdt_keepalive();
+ }
+ return len;
+}
+
+static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_options, retval = -EINVAL;
+ int new_heartbeat;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = DRV_NAME,
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof (ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ iTCO_wdt_keepalive();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ iTCO_wdt_stop();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ iTCO_wdt_keepalive();
+ iTCO_wdt_start();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ case WDIOC_SETTIMEOUT:
+ {
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (iTCO_wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ iTCO_wdt_keepalive();
+ /* Fall */
+ }
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+
+ case WDIOC_GETTIMELEFT:
+ {
+ int time_left;
+
+ if (iTCO_wdt_get_timeleft(&time_left))
+ return -EINVAL;
+
+ return put_user(time_left, p);
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations iTCO_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = iTCO_wdt_write,
+ .ioctl = iTCO_wdt_ioctl,
+ .open = iTCO_wdt_open,
+ .release = iTCO_wdt_release,
+};
+
+static struct miscdevice iTCO_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &iTCO_wdt_fops,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static int iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device_id *ent, struct platform_device *dev)
+{
+ int ret;
+ u32 base_address;
+ unsigned long RCBA;
+ unsigned long val32;
+
+ /*
+ * Find the ACPI/PM base I/O address which is the base
+ * for the TCO registers (TCOBASE=ACPIBASE + 0x60)
+ * ACPIBASE is bits [15:7] from 0x40-0x43
+ */
+ pci_read_config_dword(pdev, 0x40, &base_address);
+ base_address &= 0x0000ff80;
+ if (base_address == 0x00000000) {
+ /* Something's wrong here, ACPIBASE has to be set */
+ printk(KERN_ERR PFX "failed to get TCOBASE address\n");
+ pci_dev_put(pdev);
+ return -ENODEV;
+ }
+ iTCO_wdt_private.iTCO_version = iTCO_chipset_info[ent->driver_data].iTCO_version;
+ iTCO_wdt_private.ACPIBASE = base_address;
+ iTCO_wdt_private.pdev = pdev;
+
+ /* Get the Memory-Mapped GCS register, we need it for the NO_REBOOT flag (TCO v2) */
+ /* To get access to it you have to read RCBA from PCI Config space 0xf0
+ and use it as base. GCS = RCBA + ICH6_GCS(0x3410). */
+ if (iTCO_wdt_private.iTCO_version == 2) {
+ pci_read_config_dword(pdev, 0xf0, &base_address);
+ RCBA = base_address & 0xffffc000;
+ iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410),4);
+ }
+
+ /* Check chipset's NO_REBOOT bit */
+ if (iTCO_wdt_unset_NO_REBOOT_bit() && iTCO_vendor_check_noreboot_on()) {
+ printk(KERN_ERR PFX "failed to reset NO_REBOOT flag, reboot disabled by hardware\n");
+ ret = -ENODEV; /* Cannot reset NO_REBOOT bit */
+ goto out;
+ }
+
+ /* Set the NO_REBOOT bit to prevent later reboots, just for sure */
+ iTCO_wdt_set_NO_REBOOT_bit();
+
+ /* Set the TCO_EN bit in SMI_EN register */
+ if (!request_region(SMI_EN, 4, "iTCO_wdt")) {
+ printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n",
+ SMI_EN );
+ ret = -EIO;
+ goto out;
+ }
+ val32 = inl(SMI_EN);
+ val32 &= 0xffffdfff; /* Turn off SMI clearing watchdog */
+ outl(val32, SMI_EN);
+ release_region(SMI_EN, 4);
+
+ /* The TCO I/O registers reside in a 32-byte range pointed to by the TCOBASE value */
+ if (!request_region (TCOBASE, 0x20, "iTCO_wdt")) {
+ printk (KERN_ERR PFX "I/O address 0x%04lx already in use\n",
+ TCOBASE);
+ ret = -EIO;
+ goto out;
+ }
+
+ printk(KERN_INFO PFX "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n",
+ iTCO_chipset_info[ent->driver_data].name,
+ iTCO_chipset_info[ent->driver_data].iTCO_version,
+ TCOBASE);
+
+ /* Clear out the (probably old) status */
+ outb(0, TCO1_STS);
+ outb(3, TCO2_STS);
+
+ /* Make sure the watchdog is not running */
+ iTCO_wdt_stop();
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (iTCO_wdt_set_heartbeat(heartbeat)) {
+ iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX "heartbeat value must be 2<heartbeat<39 (TCO v1) or 613 (TCO v2), using %d\n",
+ heartbeat);
+ }
+
+ ret = misc_register(&iTCO_wdt_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto unreg_region;
+ }
+
+ printk (KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+
+ return 0;
+
+unreg_region:
+ release_region (TCOBASE, 0x20);
+out:
+ if (iTCO_wdt_private.iTCO_version == 2)
+ iounmap(iTCO_wdt_private.gcs);
+ pci_dev_put(iTCO_wdt_private.pdev);
+ iTCO_wdt_private.ACPIBASE = 0;
+ return ret;
+}
+
+static void iTCO_wdt_cleanup(void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ iTCO_wdt_stop();
+
+ /* Deregister */
+ misc_deregister(&iTCO_wdt_miscdev);
+ release_region(TCOBASE, 0x20);
+ if (iTCO_wdt_private.iTCO_version == 2)
+ iounmap(iTCO_wdt_private.gcs);
+ pci_dev_put(iTCO_wdt_private.pdev);
+ iTCO_wdt_private.ACPIBASE = 0;
+}
+
+static int iTCO_wdt_probe(struct platform_device *dev)
+{
+ int found = 0;
+ struct pci_dev *pdev = NULL;
+ const struct pci_device_id *ent;
+
+ spin_lock_init(&iTCO_wdt_private.io_lock);
+
+ for_each_pci_dev(pdev) {
+ ent = pci_match_id(iTCO_wdt_pci_tbl, pdev);
+ if (ent) {
+ if (!(iTCO_wdt_init(pdev, ent, dev))) {
+ found++;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ printk(KERN_INFO PFX "No card detected\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int iTCO_wdt_remove(struct platform_device *dev)
+{
+ if (iTCO_wdt_private.ACPIBASE)
+ iTCO_wdt_cleanup();
+
+ return 0;
+}
+
+static void iTCO_wdt_shutdown(struct platform_device *dev)
+{
+ iTCO_wdt_stop();
+}
+
+#define iTCO_wdt_suspend NULL
+#define iTCO_wdt_resume NULL
+
+static struct platform_driver iTCO_wdt_driver = {
+ .probe = iTCO_wdt_probe,
+ .remove = iTCO_wdt_remove,
+ .shutdown = iTCO_wdt_shutdown,
+ .suspend = iTCO_wdt_suspend,
+ .resume = iTCO_wdt_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+static int __init iTCO_wdt_init_module(void)
+{
+ int err;
+
+ printk(KERN_INFO PFX "Intel TCO WatchDog Timer Driver v%s (%s)\n",
+ DRV_VERSION, DRV_RELDATE);
+
+ err = platform_driver_register(&iTCO_wdt_driver);
+ if (err)
+ return err;
+
+ iTCO_wdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ if (IS_ERR(iTCO_wdt_platform_device)) {
+ err = PTR_ERR(iTCO_wdt_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&iTCO_wdt_driver);
+ return err;
+}
+
+static void __exit iTCO_wdt_cleanup_module(void)
+{
+ platform_device_unregister(iTCO_wdt_platform_device);
+ platform_driver_unregister(&iTCO_wdt_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(iTCO_wdt_init_module);
+module_exit(iTCO_wdt_cleanup_module);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("Intel TCO WatchDog Timer Driver");
+MODULE_VERSION(DRV_VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * IB700 Single Board Computer WDT driver
+ *
+ * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
+ *
+ * Based on advantechwdt.c which is based on acquirewdt.c which
+ * is based on wdt.c.
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * Based on acquirewdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ * Added timeout module option to override default
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+static struct platform_device *ibwdt_platform_device;
+static unsigned long ibwdt_is_open;
+static spinlock_t ibwdt_lock;
+static char expect_close;
+
+/* Module information */
+#define DRV_NAME "ib700wdt"
+#define PFX DRV_NAME ": "
+
+/*
+ *
+ * Watchdog Timer Configuration
+ *
+ * The function of the watchdog timer is to reset the system
+ * automatically and is defined at I/O port 0443H. To enable the
+ * watchdog timer and allow the system to reset, write I/O port 0443H.
+ * To disable the timer, write I/O port 0441H for the system to stop the
+ * watchdog function. The timer has a tolerance of 20% for its
+ * intervals.
+ *
+ * The following describes how the timer should be programmed.
+ *
+ * Enabling Watchdog:
+ * MOV AX,000FH (Choose the values from 0 to F)
+ * MOV DX,0443H
+ * OUT DX,AX
+ *
+ * Disabling Watchdog:
+ * MOV AX,000FH (Any value is fine.)
+ * MOV DX,0441H
+ * OUT DX,AX
+ *
+ * Watchdog timer control table:
+ * Level Value Time/sec | Level Value Time/sec
+ * 1 F 0 | 9 7 16
+ * 2 E 2 | 10 6 18
+ * 3 D 4 | 11 5 20
+ * 4 C 6 | 12 4 22
+ * 5 B 8 | 13 3 24
+ * 6 A 10 | 14 2 26
+ * 7 9 12 | 15 1 28
+ * 8 8 14 | 16 0 30
+ *
+ */
+
+static int wd_times[] = {
+ 30, /* 0x0 */
+ 28, /* 0x1 */
+ 26, /* 0x2 */
+ 24, /* 0x3 */
+ 22, /* 0x4 */
+ 20, /* 0x5 */
+ 18, /* 0x6 */
+ 16, /* 0x7 */
+ 14, /* 0x8 */
+ 12, /* 0x9 */
+ 10, /* 0xA */
+ 8, /* 0xB */
+ 6, /* 0xC */
+ 4, /* 0xD */
+ 2, /* 0xE */
+ 0, /* 0xF */
+};
+
+#define WDT_STOP 0x441
+#define WDT_START 0x443
+
+/* Default timeout */
+#define WD_TIMO 0 /* 30 seconds +/- 20%, from table */
+
+static int wd_margin = WD_TIMO;
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+
+/*
+ * Watchdog Operations
+ */
+
+static void
+ibwdt_ping(void)
+{
+ spin_lock(&ibwdt_lock);
+
+ /* Write a watchdog value */
+ outb_p(wd_margin, WDT_START);
+
+ spin_unlock(&ibwdt_lock);
+}
+
+static void
+ibwdt_disable(void)
+{
+ spin_lock(&ibwdt_lock);
+ outb_p(0, WDT_STOP);
+ spin_unlock(&ibwdt_lock);
+}
+
+static int
+ibwdt_set_heartbeat(int t)
+{
+ int i;
+
+ if ((t < 0) || (t > 30))
+ return -EINVAL;
+
+ for (i = 0x0F; i > -1; i--)
+ if (wd_times[i] > t)
+ break;
+ wd_margin = i;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t
+ibwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ ibwdt_ping();
+ }
+ return count;
+}
+
+static int
+ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int new_margin;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "IB700 WDT",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ ibwdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (ibwdt_set_heartbeat(new_margin))
+ return -EINVAL;
+ ibwdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_times[wd_margin], p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ ibwdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ ibwdt_ping();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int
+ibwdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &ibwdt_is_open)) {
+ return -EBUSY;
+ }
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate */
+ ibwdt_ping();
+ return nonseekable_open(inode, file);
+}
+
+static int
+ibwdt_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ ibwdt_disable();
+ } else {
+ printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ ibwdt_ping();
+ }
+ clear_bit(0, &ibwdt_is_open);
+ expect_close = 0;
+ return 0;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations ibwdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ibwdt_write,
+ .ioctl = ibwdt_ioctl,
+ .open = ibwdt_open,
+ .release = ibwdt_close,
+};
+
+static struct miscdevice ibwdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ibwdt_fops,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static int __devinit ibwdt_probe(struct platform_device *dev)
+{
+ int res;
+
+ spin_lock_init(&ibwdt_lock);
+
+#if WDT_START != WDT_STOP
+ if (!request_region(WDT_STOP, 1, "IB700 WDT")) {
+ printk (KERN_ERR PFX "STOP method I/O %X is not available.\n", WDT_STOP);
+ res = -EIO;
+ goto out_nostopreg;
+ }
+#endif
+
+ if (!request_region(WDT_START, 1, "IB700 WDT")) {
+ printk (KERN_ERR PFX "START method I/O %X is not available.\n", WDT_START);
+ res = -EIO;
+ goto out_nostartreg;
+ }
+
+ res = misc_register(&ibwdt_miscdev);
+ if (res) {
+ printk (KERN_ERR PFX "failed to register misc device\n");
+ goto out_nomisc;
+ }
+ return 0;
+
+out_nomisc:
+ release_region(WDT_START, 1);
+out_nostartreg:
+#if WDT_START != WDT_STOP
+ release_region(WDT_STOP, 1);
+#endif
+out_nostopreg:
+ return res;
+}
+
+static int __devexit ibwdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&ibwdt_miscdev);
+ release_region(WDT_START,1);
+#if WDT_START != WDT_STOP
+ release_region(WDT_STOP,1);
+#endif
+ return 0;
+}
+
+static void ibwdt_shutdown(struct platform_device *dev)
+{
+ /* Turn the WDT off if we have a soft shutdown */
+ ibwdt_disable();
+}
+
+static struct platform_driver ibwdt_driver = {
+ .probe = ibwdt_probe,
+ .remove = __devexit_p(ibwdt_remove),
+ .shutdown = ibwdt_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRV_NAME,
+ },
+};
+
+static int __init ibwdt_init(void)
+{
+ int err;
+
+ printk(KERN_INFO PFX "WDT driver for IB700 single board computer initialising.\n");
+
+ err = platform_driver_register(&ibwdt_driver);
+ if (err)
+ return err;
+
+ ibwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ if (IS_ERR(ibwdt_platform_device)) {
+ err = PTR_ERR(ibwdt_platform_device);
+ goto unreg_platform_driver;
+ }
+
+ return 0;
+
+unreg_platform_driver:
+ platform_driver_unregister(&ibwdt_driver);
+ return err;
+}
+
+static void __exit ibwdt_exit(void)
+{
+ platform_device_unregister(ibwdt_platform_device);
+ platform_driver_unregister(&ibwdt_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(ibwdt_init);
+module_exit(ibwdt_exit);
+
+MODULE_AUTHOR("Charles Howes <chowes@vsol.net>");
+MODULE_DESCRIPTION("IB700 SBC watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+/* end of ib700wdt.c */
--- /dev/null
+/*
+ * IBM Automatic Server Restart driver.
+ *
+ * Copyright (c) 2005 Andrey Panin <pazke@donpac.ru>
+ *
+ * Based on driver written by Pete Reynolds.
+ * Copyright (c) IBM Corporation, 1998-2004.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU Public License, incorporated herein by reference.
+ */
+
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/dmi.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+
+enum {
+ ASMTYPE_UNKNOWN,
+ ASMTYPE_TOPAZ,
+ ASMTYPE_JASPER,
+ ASMTYPE_PEARL,
+ ASMTYPE_JUNIPER,
+ ASMTYPE_SPRUCE,
+};
+
+#define PFX "ibmasr: "
+
+#define TOPAZ_ASR_REG_OFFSET 4
+#define TOPAZ_ASR_TOGGLE 0x40
+#define TOPAZ_ASR_DISABLE 0x80
+
+/* PEARL ASR S/W REGISTER SUPERIO PORT ADDRESSES */
+#define PEARL_BASE 0xe04
+#define PEARL_WRITE 0xe06
+#define PEARL_READ 0xe07
+
+#define PEARL_ASR_DISABLE_MASK 0x80 /* bit 7: disable = 1, enable = 0 */
+#define PEARL_ASR_TOGGLE_MASK 0x40 /* bit 6: 0, then 1, then 0 */
+
+/* JASPER OFFSET FROM SIO BASE ADDR TO ASR S/W REGISTERS. */
+#define JASPER_ASR_REG_OFFSET 0x38
+
+#define JASPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1, enable = 0 */
+#define JASPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */
+
+#define JUNIPER_BASE_ADDRESS 0x54b /* Base address of Juniper ASR */
+#define JUNIPER_ASR_DISABLE_MASK 0x01 /* bit 0: disable = 1 enable = 0 */
+#define JUNIPER_ASR_TOGGLE_MASK 0x02 /* bit 1: 0, then 1, then 0 */
+
+#define SPRUCE_BASE_ADDRESS 0x118e /* Base address of Spruce ASR */
+#define SPRUCE_ASR_DISABLE_MASK 0x01 /* bit 1: disable = 1 enable = 0 */
+#define SPRUCE_ASR_TOGGLE_MASK 0x02 /* bit 0: 0, then 1, then 0 */
+
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+static unsigned long asr_is_open;
+static char asr_expect_close;
+
+static unsigned int asr_type, asr_base, asr_length;
+static unsigned int asr_read_addr, asr_write_addr;
+static unsigned char asr_toggle_mask, asr_disable_mask;
+
+static void asr_toggle(void)
+{
+ unsigned char reg = inb(asr_read_addr);
+
+ outb(reg & ~asr_toggle_mask, asr_write_addr);
+ reg = inb(asr_read_addr);
+
+ outb(reg | asr_toggle_mask, asr_write_addr);
+ reg = inb(asr_read_addr);
+
+ outb(reg & ~asr_toggle_mask, asr_write_addr);
+ reg = inb(asr_read_addr);
+}
+
+static void asr_enable(void)
+{
+ unsigned char reg;
+
+ if (asr_type == ASMTYPE_TOPAZ) {
+ /* asr_write_addr == asr_read_addr */
+ reg = inb(asr_read_addr);
+ outb(reg & ~(TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE),
+ asr_read_addr);
+ } else {
+ /*
+ * First make sure the hardware timer is reset by toggling
+ * ASR hardware timer line.
+ */
+ asr_toggle();
+
+ reg = inb(asr_read_addr);
+ outb(reg & ~asr_disable_mask, asr_write_addr);
+ }
+ reg = inb(asr_read_addr);
+}
+
+static void asr_disable(void)
+{
+ unsigned char reg = inb(asr_read_addr);
+
+ if (asr_type == ASMTYPE_TOPAZ)
+ /* asr_write_addr == asr_read_addr */
+ outb(reg | TOPAZ_ASR_TOGGLE | TOPAZ_ASR_DISABLE,
+ asr_read_addr);
+ else {
+ outb(reg | asr_toggle_mask, asr_write_addr);
+ reg = inb(asr_read_addr);
+
+ outb(reg | asr_disable_mask, asr_write_addr);
+ }
+ reg = inb(asr_read_addr);
+}
+
+static int __init asr_get_base_address(void)
+{
+ unsigned char low, high;
+ const char *type = "";
+
+ asr_length = 1;
+
+ switch (asr_type) {
+ case ASMTYPE_TOPAZ:
+ /* SELECT SuperIO CHIP FOR QUERYING (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
+ outb(0x07, 0x2e);
+ outb(0x07, 0x2f);
+
+ /* SELECT AND READ THE HIGH-NIBBLE OF THE GPIO BASE ADDRESS */
+ outb(0x60, 0x2e);
+ high = inb(0x2f);
+
+ /* SELECT AND READ THE LOW-NIBBLE OF THE GPIO BASE ADDRESS */
+ outb(0x61, 0x2e);
+ low = inb(0x2f);
+
+ asr_base = (high << 16) | low;
+ asr_read_addr = asr_write_addr =
+ asr_base + TOPAZ_ASR_REG_OFFSET;
+ asr_length = 5;
+
+ break;
+
+ case ASMTYPE_JASPER:
+ type = "Jaspers ";
+
+ /* FIXME: need to use pci_config_lock here, but it's not exported */
+
+/* spin_lock_irqsave(&pci_config_lock, flags);*/
+
+ /* Select the SuperIO chip in the PCI I/O port register */
+ outl(0x8000f858, 0xcf8);
+
+ /*
+ * Read the base address for the SuperIO chip.
+ * Only the lower 16 bits are valid, but the address is word
+ * aligned so the last bit must be masked off.
+ */
+ asr_base = inl(0xcfc) & 0xfffe;
+
+/* spin_unlock_irqrestore(&pci_config_lock, flags);*/
+
+ asr_read_addr = asr_write_addr =
+ asr_base + JASPER_ASR_REG_OFFSET;
+ asr_toggle_mask = JASPER_ASR_TOGGLE_MASK;
+ asr_disable_mask = JASPER_ASR_DISABLE_MASK;
+ asr_length = JASPER_ASR_REG_OFFSET + 1;
+
+ break;
+
+ case ASMTYPE_PEARL:
+ type = "Pearls ";
+ asr_base = PEARL_BASE;
+ asr_read_addr = PEARL_READ;
+ asr_write_addr = PEARL_WRITE;
+ asr_toggle_mask = PEARL_ASR_TOGGLE_MASK;
+ asr_disable_mask = PEARL_ASR_DISABLE_MASK;
+ asr_length = 4;
+ break;
+
+ case ASMTYPE_JUNIPER:
+ type = "Junipers ";
+ asr_base = JUNIPER_BASE_ADDRESS;
+ asr_read_addr = asr_write_addr = asr_base;
+ asr_toggle_mask = JUNIPER_ASR_TOGGLE_MASK;
+ asr_disable_mask = JUNIPER_ASR_DISABLE_MASK;
+ break;
+
+ case ASMTYPE_SPRUCE:
+ type = "Spruce's ";
+ asr_base = SPRUCE_BASE_ADDRESS;
+ asr_read_addr = asr_write_addr = asr_base;
+ asr_toggle_mask = SPRUCE_ASR_TOGGLE_MASK;
+ asr_disable_mask = SPRUCE_ASR_DISABLE_MASK;
+ break;
+ }
+
+ if (!request_region(asr_base, asr_length, "ibmasr")) {
+ printk(KERN_ERR PFX "address %#x already in use\n",
+ asr_base);
+ return -EBUSY;
+ }
+
+ printk(KERN_INFO PFX "found %sASR @ addr %#x\n", type, asr_base);
+
+ return 0;
+}
+
+
+static ssize_t asr_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ asr_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ asr_expect_close = 42;
+ }
+ }
+ asr_toggle();
+ }
+ return count;
+}
+
+static int asr_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .identity = "IBM ASR"
+ };
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int heartbeat;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ?
+ -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ asr_toggle();
+ return 0;
+
+ /*
+ * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
+ * and WDIOC_GETTIMEOUT always returns 256.
+ */
+ case WDIOC_GETTIMEOUT:
+ heartbeat = 256;
+ return put_user(heartbeat, p);
+
+ case WDIOC_SETOPTIONS: {
+ int new_options, retval = -EINVAL;
+
+ if (get_user(new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ asr_disable();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ asr_enable();
+ asr_toggle();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+
+ return -ENOTTY;
+}
+
+static int asr_open(struct inode *inode, struct file *file)
+{
+ if(test_and_set_bit(0, &asr_is_open))
+ return -EBUSY;
+
+ asr_toggle();
+ asr_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int asr_release(struct inode *inode, struct file *file)
+{
+ if (asr_expect_close == 42)
+ asr_disable();
+ else {
+ printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
+ asr_toggle();
+ }
+ clear_bit(0, &asr_is_open);
+ asr_expect_close = 0;
+ return 0;
+}
+
+static const struct file_operations asr_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = asr_write,
+ .ioctl = asr_ioctl,
+ .open = asr_open,
+ .release = asr_release,
+};
+
+static struct miscdevice asr_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &asr_fops,
+};
+
+
+struct ibmasr_id {
+ const char *desc;
+ int type;
+};
+
+static struct ibmasr_id __initdata ibmasr_id_table[] = {
+ { "IBM Automatic Server Restart - eserver xSeries 220", ASMTYPE_TOPAZ },
+ { "IBM Automatic Server Restart - Machine Type 8673", ASMTYPE_PEARL },
+ { "IBM Automatic Server Restart - Machine Type 8480", ASMTYPE_JASPER },
+ { "IBM Automatic Server Restart - Machine Type 8482", ASMTYPE_JUNIPER },
+ { "IBM Automatic Server Restart - Machine Type 8648", ASMTYPE_SPRUCE },
+ { NULL }
+};
+
+static int __init ibmasr_init(void)
+{
+ struct ibmasr_id *id;
+ int rc;
+
+ for (id = ibmasr_id_table; id->desc; id++) {
+ if (dmi_find_device(DMI_DEV_TYPE_OTHER, id->desc, NULL)) {
+ asr_type = id->type;
+ break;
+ }
+ }
+
+ if (!asr_type)
+ return -ENODEV;
+
+ rc = asr_get_base_address();
+ if (rc)
+ return rc;
+
+ rc = misc_register(&asr_miscdev);
+ if (rc < 0) {
+ release_region(asr_base, asr_length);
+ printk(KERN_ERR PFX "failed to register misc device\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit ibmasr_exit(void)
+{
+ if (!nowayout)
+ asr_disable();
+
+ misc_deregister(&asr_miscdev);
+
+ release_region(asr_base, asr_length);
+}
+
+module_init(ibmasr_init);
+module_exit(ibmasr_exit);
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+MODULE_DESCRIPTION("IBM Automatic Server Restart driver");
+MODULE_AUTHOR("Andrey Panin");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * IndyDog 0.3 A Hardware Watchdog Device for SGI IP22
+ *
+ * (c) Copyright 2002 Guido Guenther <agx@sigxcpu.org>, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * based on softdog.c by Alan Cox <alan@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/sgi/mc.h>
+
+#define PFX "indydog: "
+static int indydog_alive;
+
+#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static void indydog_start(void)
+{
+ u32 mc_ctrl0 = sgimc->cpuctrl0;
+
+ mc_ctrl0 = sgimc->cpuctrl0 | SGIMC_CCTRL0_WDOG;
+ sgimc->cpuctrl0 = mc_ctrl0;
+}
+
+static void indydog_stop(void)
+{
+ u32 mc_ctrl0 = sgimc->cpuctrl0;
+
+ mc_ctrl0 &= ~SGIMC_CCTRL0_WDOG;
+ sgimc->cpuctrl0 = mc_ctrl0;
+
+ printk(KERN_INFO PFX "Stopped watchdog timer.\n");
+}
+
+static void indydog_ping(void)
+{
+ sgimc->watchdogt = 0;
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+static int indydog_open(struct inode *inode, struct file *file)
+{
+ if (indydog_alive)
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate timer */
+ indydog_start();
+ indydog_ping();
+
+ indydog_alive = 1;
+ printk(KERN_INFO "Started watchdog timer.\n");
+
+ return nonseekable_open(inode, file);
+}
+
+static int indydog_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer.
+ * Lock it in if it's a module and we defined ...NOWAYOUT */
+ if (!nowayout)
+ indydog_stop(); /* Turn the WDT off */
+
+ indydog_alive = 0;
+
+ return 0;
+}
+
+static ssize_t indydog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ /* Refresh the timer. */
+ if (len) {
+ indydog_ping();
+ }
+ return len;
+}
+
+static int indydog_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int options, retval = -EINVAL;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "Hardware Watchdog for SGI IP22",
+ };
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user((struct watchdog_info *)arg,
+ &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0,(int *)arg);
+ case WDIOC_KEEPALIVE:
+ indydog_ping();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(WATCHDOG_TIMEOUT,(int *)arg);
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ indydog_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ indydog_start();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+static int indydog_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ indydog_stop(); /* Turn the WDT off */
+
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations indydog_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = indydog_write,
+ .ioctl = indydog_ioctl,
+ .open = indydog_open,
+ .release = indydog_release,
+};
+
+static struct miscdevice indydog_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &indydog_fops,
+};
+
+static struct notifier_block indydog_notifier = {
+ .notifier_call = indydog_notify_sys,
+};
+
+static char banner[] __initdata =
+ KERN_INFO PFX "Hardware Watchdog Timer for SGI IP22: 0.3\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ ret = register_reboot_notifier(&indydog_notifier);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ return ret;
+ }
+
+ ret = misc_register(&indydog_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&indydog_notifier);
+ return ret;
+ }
+
+ printk(banner);
+
+ return 0;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&indydog_miscdev);
+ unregister_reboot_notifier(&indydog_notifier);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
+MODULE_DESCRIPTION("Hardware Watchdog Device for SGI IP22");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * drivers/char/watchdog/iop_wdt.c
+ *
+ * WDT driver for Intel I/O Processors
+ * Copyright (C) 2005, Intel Corporation.
+ *
+ * Based on ixp4xx driver, Copyright 2004 (c) MontaVista, Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * Curt E Bruns <curt.e.bruns@intel.com>
+ * Peter Milne <peter.milne@d-tacq.com>
+ * Dan Williams <dan.j.williams@intel.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/uaccess.h>
+#include <asm/hardware.h>
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static unsigned long wdt_status;
+static unsigned long boot_status;
+
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+#define WDT_ENABLED 2
+
+static unsigned long iop_watchdog_timeout(void)
+{
+ return (0xffffffffUL / get_iop_tick_rate());
+}
+
+/**
+ * wdt_supports_disable - determine if we are accessing a iop13xx watchdog
+ * or iop3xx by whether it has a disable command
+ */
+static int wdt_supports_disable(void)
+{
+ int can_disable;
+
+ if (IOP_WDTCR_EN_ARM != IOP_WDTCR_DIS_ARM)
+ can_disable = 1;
+ else
+ can_disable = 0;
+
+ return can_disable;
+}
+
+static void wdt_enable(void)
+{
+ /* Arm and enable the Timer to starting counting down from 0xFFFF.FFFF
+ * Takes approx. 10.7s to timeout
+ */
+ write_wdtcr(IOP_WDTCR_EN_ARM);
+ write_wdtcr(IOP_WDTCR_EN);
+}
+
+/* returns 0 if the timer was successfully disabled */
+static int wdt_disable(void)
+{
+ /* Stop Counting */
+ if (wdt_supports_disable()) {
+ write_wdtcr(IOP_WDTCR_DIS_ARM);
+ write_wdtcr(IOP_WDTCR_DIS);
+ clear_bit(WDT_ENABLED, &wdt_status);
+ printk(KERN_INFO "WATCHDOG: Disabled\n");
+ return 0;
+ } else
+ return 1;
+}
+
+static int iop_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ wdt_enable();
+
+ set_bit(WDT_ENABLED, &wdt_status);
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+iop_wdt_write(struct file *file, const char *data, size_t len,
+ loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ }
+ }
+ wdt_enable();
+ }
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
+ .identity = "iop watchdog",
+};
+
+static int
+iop_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int options;
+ int ret = -ENOTTY;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user
+ ((struct watchdog_info *)arg, &ident, sizeof ident))
+ ret = -EFAULT;
+ else
+ ret = 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(boot_status, (int *)arg);
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(iop_watchdog_timeout(), (int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_enable();
+ ret = 0;
+ break;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ if (!nowayout) {
+ if (wdt_disable() == 0) {
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ ret = 0;
+ } else
+ ret = -ENXIO;
+ } else
+ ret = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wdt_enable();
+ ret = 0;
+ }
+ break;
+ }
+
+ return ret;
+}
+
+static int iop_wdt_release(struct inode *inode, struct file *file)
+{
+ int state = 1;
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
+ if (test_bit(WDT_ENABLED, &wdt_status))
+ state = wdt_disable();
+
+ /* if the timer is not disbaled reload and notify that we are still
+ * going down
+ */
+ if (state != 0) {
+ wdt_enable();
+ printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
+ "reset in %lu seconds\n", iop_watchdog_timeout());
+ }
+
+ clear_bit(WDT_IN_USE, &wdt_status);
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ return 0;
+}
+
+static const struct file_operations iop_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = iop_wdt_write,
+ .ioctl = iop_wdt_ioctl,
+ .open = iop_wdt_open,
+ .release = iop_wdt_release,
+};
+
+static struct miscdevice iop_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &iop_wdt_fops,
+};
+
+static int __init iop_wdt_init(void)
+{
+ int ret;
+
+ ret = misc_register(&iop_wdt_miscdev);
+ if (ret == 0)
+ printk("iop watchdog timer: timeout %lu sec\n",
+ iop_watchdog_timeout());
+
+ /* check if the reset was caused by the watchdog timer */
+ boot_status = (read_rcsr() & IOP_RCSR_WDT) ? WDIOF_CARDRESET : 0;
+
+ /* Configure Watchdog Timeout to cause an Internal Bus (IB) Reset
+ * NOTE: An IB Reset will Reset both cores in the IOP342
+ */
+ write_wdtsr(IOP13XX_WDTCR_IB_RESET);
+
+ return ret;
+}
+
+static void __exit iop_wdt_exit(void)
+{
+ misc_deregister(&iop_wdt_miscdev);
+}
+
+module_init(iop_wdt_init);
+module_exit(iop_wdt_exit);
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
+
+MODULE_AUTHOR("Curt E Bruns <curt.e.bruns@intel.com>");
+MODULE_DESCRIPTION("iop watchdog timer driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * drivers/char/watchdog/ixp2000_wdt.c
+ *
+ * Watchdog driver for Intel IXP2000 network processors
+ *
+ * Adapted from the IXP4xx watchdog driver by Lennert Buytenhek.
+ * The original version carries these notices:
+ *
+ * Author: Deepak Saxena <dsaxena@plexity.net>
+ *
+ * Copyright 2004 (c) MontaVista, Software, Inc.
+ * Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static unsigned int heartbeat = 60; /* (secs) Default is 1 minute */
+static unsigned long wdt_status;
+
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+
+static unsigned long wdt_tick_rate;
+
+static void
+wdt_enable(void)
+{
+ ixp2000_reg_write(IXP2000_RESET0, *(IXP2000_RESET0) | WDT_RESET_ENABLE);
+ ixp2000_reg_write(IXP2000_TWDE, WDT_ENABLE);
+ ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
+ ixp2000_reg_write(IXP2000_T4_CTL, TIMER_DIVIDER_256 | TIMER_ENABLE);
+}
+
+static void
+wdt_disable(void)
+{
+ ixp2000_reg_write(IXP2000_T4_CTL, 0);
+}
+
+static void
+wdt_keepalive(void)
+{
+ ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
+}
+
+static int
+ixp2000_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+ixp2000_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ }
+ }
+ wdt_keepalive();
+ }
+
+ return len;
+}
+
+
+static struct watchdog_info ident = {
+ .options = WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING,
+ .identity = "IXP2000 Watchdog",
+};
+
+static int
+ixp2000_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -ENOTTY;
+ int time;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(time, (int *)arg);
+ if (ret)
+ break;
+
+ if (time <= 0 || time > 60) {
+ ret = -EINVAL;
+ break;
+ }
+
+ heartbeat = time;
+ wdt_keepalive();
+ /* Fall through */
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(heartbeat, (int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_enable();
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+static int
+ixp2000_wdt_release(struct inode *inode, struct file *file)
+{
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
+ wdt_disable();
+ } else {
+ printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
+ "timer will not stop\n");
+ }
+
+ clear_bit(WDT_IN_USE, &wdt_status);
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ return 0;
+}
+
+
+static const struct file_operations ixp2000_wdt_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ixp2000_wdt_write,
+ .ioctl = ixp2000_wdt_ioctl,
+ .open = ixp2000_wdt_open,
+ .release = ixp2000_wdt_release,
+};
+
+static struct miscdevice ixp2000_wdt_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ixp2000_wdt_fops,
+};
+
+static int __init ixp2000_wdt_init(void)
+{
+ if ((*IXP2000_PRODUCT_ID & 0x001ffef0) == 0x00000000) {
+ printk(KERN_INFO "Unable to use IXP2000 watchdog due to IXP2800 erratum #25.\n");
+ return -EIO;
+ }
+
+ wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256;
+
+ return misc_register(&ixp2000_wdt_miscdev);
+}
+
+static void __exit ixp2000_wdt_exit(void)
+{
+ misc_deregister(&ixp2000_wdt_miscdev);
+}
+
+module_init(ixp2000_wdt_init);
+module_exit(ixp2000_wdt_exit);
+
+MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
+MODULE_DESCRIPTION("IXP2000 Network Processor Watchdog");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
--- /dev/null
+/*
+ * drivers/char/watchdog/ixp4xx_wdt.c
+ *
+ * Watchdog driver for Intel IXP4xx network processors
+ *
+ * Author: Deepak Saxena <dsaxena@plexity.net>
+ *
+ * Copyright 2004 (c) MontaVista, Software, Inc.
+ * Based on sa1100 driver, Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static int heartbeat = 60; /* (secs) Default is 1 minute */
+static unsigned long wdt_status;
+static unsigned long boot_status;
+
+#define WDT_TICK_RATE (IXP4XX_PERIPHERAL_BUS_CLOCK * 1000000UL)
+
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+
+static void
+wdt_enable(void)
+{
+ *IXP4XX_OSWK = IXP4XX_WDT_KEY;
+ *IXP4XX_OSWE = 0;
+ *IXP4XX_OSWT = WDT_TICK_RATE * heartbeat;
+ *IXP4XX_OSWE = IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE;
+ *IXP4XX_OSWK = 0;
+}
+
+static void
+wdt_disable(void)
+{
+ *IXP4XX_OSWK = IXP4XX_WDT_KEY;
+ *IXP4XX_OSWE = 0;
+ *IXP4XX_OSWK = 0;
+}
+
+static int
+ixp4xx_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+ixp4xx_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ }
+ }
+ wdt_enable();
+ }
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "IXP4xx Watchdog",
+};
+
+
+static int
+ixp4xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -ENOTTY;
+ int time;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(boot_status, (int *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(time, (int *)arg);
+ if (ret)
+ break;
+
+ if (time <= 0 || time > 60) {
+ ret = -EINVAL;
+ break;
+ }
+
+ heartbeat = time;
+ wdt_enable();
+ /* Fall through */
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(heartbeat, (int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_enable();
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int
+ixp4xx_wdt_release(struct inode *inode, struct file *file)
+{
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
+ wdt_disable();
+ } else {
+ printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
+ "timer will not stop\n");
+ }
+
+ clear_bit(WDT_IN_USE, &wdt_status);
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ return 0;
+}
+
+
+static const struct file_operations ixp4xx_wdt_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ixp4xx_wdt_write,
+ .ioctl = ixp4xx_wdt_ioctl,
+ .open = ixp4xx_wdt_open,
+ .release = ixp4xx_wdt_release,
+};
+
+static struct miscdevice ixp4xx_wdt_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ixp4xx_wdt_fops,
+};
+
+static int __init ixp4xx_wdt_init(void)
+{
+ int ret;
+ unsigned long processor_id;
+
+ asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
+ if (!(processor_id & 0xf) && !cpu_is_ixp46x()) {
+ printk("IXP4XXX Watchdog: Rev. A0 IXP42x CPU detected - "
+ "watchdog disabled\n");
+
+ return -ENODEV;
+ }
+
+ ret = misc_register(&ixp4xx_wdt_miscdev);
+ if (ret == 0)
+ printk("IXP4xx Watchdog Timer: heartbeat %d sec\n", heartbeat);
+
+ boot_status = (*IXP4XX_OSST & IXP4XX_OSST_TIMER_WARM_RESET) ?
+ WDIOF_CARDRESET : 0;
+
+ return ret;
+}
+
+static void __exit ixp4xx_wdt_exit(void)
+{
+ misc_deregister(&ixp4xx_wdt_miscdev);
+}
+
+
+module_init(ixp4xx_wdt_init);
+module_exit(ixp4xx_wdt_exit);
+
+MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
+MODULE_DESCRIPTION("IXP4xx Network Processor Watchdog");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds (default 60s)");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
--- /dev/null
+/*
+ * Watchdog driver for Kendin/Micrel KS8695.
+ *
+ * (C) 2007 Andrew Victor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/arch/regs-timer.h>
+
+
+#define WDT_DEFAULT_TIME 5 /* seconds */
+#define WDT_MAX_TIME 171 /* seconds */
+
+static int wdt_time = WDT_DEFAULT_TIME;
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+module_param(wdt_time, int, 0);
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+#endif
+
+
+static unsigned long ks8695wdt_busy;
+
+/* ......................................................................... */
+
+/*
+ * Disable the watchdog.
+ */
+static void inline ks8695_wdt_stop(void)
+{
+ unsigned long tmcon;
+
+ /* disable timer0 */
+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Enable and reset the watchdog.
+ */
+static void inline ks8695_wdt_start(void)
+{
+ unsigned long tmcon;
+ unsigned long tval = wdt_time * CLOCK_TICK_RATE;
+
+ /* disable timer0 */
+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+
+ /* program timer0 */
+ __raw_writel(tval | T0TC_WATCHDOG, KS8695_TMR_VA + KS8695_T0TC);
+
+ /* re-enable timer0 */
+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+ __raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Reload the watchdog timer. (ie, pat the watchdog)
+ */
+static void inline ks8695_wdt_reload(void)
+{
+ unsigned long tmcon;
+
+ /* disable, then re-enable timer0 */
+ tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
+ __raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+ __raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+}
+
+/*
+ * Change the watchdog time interval.
+ */
+static int ks8695_wdt_settimeout(int new_time)
+{
+ /*
+ * All counting occurs at SLOW_CLOCK / 128 = 0.256 Hz
+ *
+ * Since WDV is a 16-bit counter, the maximum period is
+ * 65536 / 0.256 = 256 seconds.
+ */
+ if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
+ return -EINVAL;
+
+ /* Set new watchdog time. It will be used when ks8695_wdt_start() is called. */
+ wdt_time = new_time;
+ return 0;
+}
+
+/* ......................................................................... */
+
+/*
+ * Watchdog device is opened, and watchdog starts running.
+ */
+static int ks8695_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &ks8695wdt_busy))
+ return -EBUSY;
+
+ ks8695_wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * Close the watchdog device.
+ * If CONFIG_WATCHDOG_NOWAYOUT is NOT defined then the watchdog is also
+ * disabled.
+ */
+static int ks8695_wdt_close(struct inode *inode, struct file *file)
+{
+ if (!nowayout)
+ ks8695_wdt_stop(); /* Disable the watchdog when file is closed */
+
+ clear_bit(0, &ks8695wdt_busy);
+ return 0;
+}
+
+static struct watchdog_info ks8695_wdt_info = {
+ .identity = "ks8695 watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+};
+
+/*
+ * Handle commands from user-space.
+ */
+static int ks8695_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_value;
+
+ switch(cmd) {
+ case WDIOC_KEEPALIVE:
+ ks8695_wdt_reload(); /* pat the watchdog */
+ return 0;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ks8695_wdt_info, sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (ks8695_wdt_settimeout(new_value))
+ return -EINVAL;
+
+ /* Enable new time value */
+ ks8695_wdt_start();
+
+ /* Return current value */
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+
+ if (new_value & WDIOS_DISABLECARD)
+ ks8695_wdt_stop();
+ if (new_value & WDIOS_ENABLECARD)
+ ks8695_wdt_start();
+ return 0;
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/*
+ * Pat the watchdog whenever device is written to.
+ */
+static ssize_t ks8695_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ ks8695_wdt_reload(); /* pat the watchdog */
+ return len;
+}
+
+/* ......................................................................... */
+
+static const struct file_operations ks8695wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = ks8695_wdt_ioctl,
+ .open = ks8695_wdt_open,
+ .release = ks8695_wdt_close,
+ .write = ks8695_wdt_write,
+};
+
+static struct miscdevice ks8695wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &ks8695wdt_fops,
+};
+
+static int __init ks8695wdt_probe(struct platform_device *pdev)
+{
+ int res;
+
+ if (ks8695wdt_miscdev.parent)
+ return -EBUSY;
+ ks8695wdt_miscdev.parent = &pdev->dev;
+
+ res = misc_register(&ks8695wdt_miscdev);
+ if (res)
+ return res;
+
+ printk("KS8695 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+ return 0;
+}
+
+static int __exit ks8695wdt_remove(struct platform_device *pdev)
+{
+ int res;
+
+ res = misc_deregister(&ks8695wdt_miscdev);
+ if (!res)
+ ks8695wdt_miscdev.parent = NULL;
+
+ return res;
+}
+
+static void ks8695wdt_shutdown(struct platform_device *pdev)
+{
+ ks8695_wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static int ks8695wdt_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ ks8695_wdt_stop();
+ return 0;
+}
+
+static int ks8695wdt_resume(struct platform_device *pdev)
+{
+ if (ks8695wdt_busy)
+ ks8695_wdt_start();
+ return 0;
+}
+
+#else
+#define ks8695wdt_suspend NULL
+#define ks8695wdt_resume NULL
+#endif
+
+static struct platform_driver ks8695wdt_driver = {
+ .probe = ks8695wdt_probe,
+ .remove = __exit_p(ks8695wdt_remove),
+ .shutdown = ks8695wdt_shutdown,
+ .suspend = ks8695wdt_suspend,
+ .resume = ks8695wdt_resume,
+ .driver = {
+ .name = "ks8695_wdt",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init ks8695_wdt_init(void)
+{
+ /* Check that the heartbeat value is within range; if not reset to the default */
+ if (ks8695_wdt_settimeout(wdt_time)) {
+ ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
+ pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", wdt_time, WDT_MAX_TIME);
+ }
+
+ return platform_driver_register(&ks8695wdt_driver);
+}
+
+static void __exit ks8695_wdt_exit(void)
+{
+ platform_driver_unregister(&ks8695wdt_driver);
+}
+
+module_init(ks8695_wdt_init);
+module_exit(ks8695_wdt_exit);
+
+MODULE_AUTHOR("Andrew Victor");
+MODULE_DESCRIPTION("Watchdog driver for KS8695");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * MachZ ZF-Logic Watchdog Timer driver for Linux
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The author does NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * Author: Fernando Fuganti <fuganti@conectiva.com.br>
+ *
+ * Based on sbc60xxwdt.c by Jakob Oestergaard
+ *
+ *
+ * We have two timers (wd#1, wd#2) driven by a 32 KHz clock with the
+ * following periods:
+ * wd#1 - 2 seconds;
+ * wd#2 - 7.2 ms;
+ * After the expiration of wd#1, it can generate a NMI, SCI, SMI, or
+ * a system RESET and it starts wd#2 that unconditionaly will RESET
+ * the system when the counter reaches zero.
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* ports */
+#define ZF_IOBASE 0x218
+#define INDEX 0x218
+#define DATA_B 0x219
+#define DATA_W 0x21A
+#define DATA_D 0x21A
+
+/* indexes */ /* size */
+#define ZFL_VERSION 0x02 /* 16 */
+#define CONTROL 0x10 /* 16 */
+#define STATUS 0x12 /* 8 */
+#define COUNTER_1 0x0C /* 16 */
+#define COUNTER_2 0x0E /* 8 */
+#define PULSE_LEN 0x0F /* 8 */
+
+/* controls */
+#define ENABLE_WD1 0x0001
+#define ENABLE_WD2 0x0002
+#define RESET_WD1 0x0010
+#define RESET_WD2 0x0020
+#define GEN_SCI 0x0100
+#define GEN_NMI 0x0200
+#define GEN_SMI 0x0400
+#define GEN_RESET 0x0800
+
+
+/* utilities */
+
+#define WD1 0
+#define WD2 1
+
+#define zf_writew(port, data) { outb(port, INDEX); outw(data, DATA_W); }
+#define zf_writeb(port, data) { outb(port, INDEX); outb(data, DATA_B); }
+#define zf_get_ZFL_version() zf_readw(ZFL_VERSION)
+
+
+static unsigned short zf_readw(unsigned char port)
+{
+ outb(port, INDEX);
+ return inw(DATA_W);
+}
+
+
+MODULE_AUTHOR("Fernando Fuganti <fuganti@conectiva.com.br>");
+MODULE_DESCRIPTION("MachZ ZF-Logic Watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define PFX "machzwd"
+
+static struct watchdog_info zf_info = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "ZF-Logic watchdog",
+};
+
+
+/*
+ * action refers to action taken when watchdog resets
+ * 0 = GEN_RESET
+ * 1 = GEN_SMI
+ * 2 = GEN_NMI
+ * 3 = GEN_SCI
+ * defaults to GEN_RESET (0)
+ */
+static int action = 0;
+module_param(action, int, 0);
+MODULE_PARM_DESC(action, "after watchdog resets, generate: 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI");
+
+static void zf_ping(unsigned long data);
+
+static int zf_action = GEN_RESET;
+static unsigned long zf_is_open;
+static char zf_expect_close;
+static spinlock_t zf_lock;
+static spinlock_t zf_port_lock;
+static DEFINE_TIMER(zf_timer, zf_ping, 0, 0);
+static unsigned long next_heartbeat = 0;
+
+
+/* timeout for user land heart beat (10 seconds) */
+#define ZF_USER_TIMEO (HZ*10)
+
+/* timeout for hardware watchdog (~500ms) */
+#define ZF_HW_TIMEO (HZ/2)
+
+/* number of ticks on WD#1 (driven by a 32KHz clock, 2s) */
+#define ZF_CTIMEOUT 0xffff
+
+#ifndef ZF_DEBUG
+# define dprintk(format, args...)
+#else
+# define dprintk(format, args...) printk(KERN_DEBUG PFX ":%s:%d: " format, __FUNCTION__, __LINE__ , ## args)
+#endif
+
+
+static inline void zf_set_status(unsigned char new)
+{
+ zf_writeb(STATUS, new);
+}
+
+
+/* CONTROL register functions */
+
+static inline unsigned short zf_get_control(void)
+{
+ return zf_readw(CONTROL);
+}
+
+static inline void zf_set_control(unsigned short new)
+{
+ zf_writew(CONTROL, new);
+}
+
+
+/* WD#? counter functions */
+/*
+ * Just set counter value
+ */
+
+static inline void zf_set_timer(unsigned short new, unsigned char n)
+{
+ switch(n){
+ case WD1:
+ zf_writew(COUNTER_1, new);
+ case WD2:
+ zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
+ default:
+ return;
+ }
+}
+
+/*
+ * stop hardware timer
+ */
+static void zf_timer_off(void)
+{
+ unsigned int ctrl_reg = 0;
+ unsigned long flags;
+
+ /* stop internal ping */
+ del_timer_sync(&zf_timer);
+
+ spin_lock_irqsave(&zf_port_lock, flags);
+ /* stop watchdog timer */
+ ctrl_reg = zf_get_control();
+ ctrl_reg |= (ENABLE_WD1|ENABLE_WD2); /* disable wd1 and wd2 */
+ ctrl_reg &= ~(ENABLE_WD1|ENABLE_WD2);
+ zf_set_control(ctrl_reg);
+ spin_unlock_irqrestore(&zf_port_lock, flags);
+
+ printk(KERN_INFO PFX ": Watchdog timer is now disabled\n");
+}
+
+
+/*
+ * start hardware timer
+ */
+static void zf_timer_on(void)
+{
+ unsigned int ctrl_reg = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&zf_port_lock, flags);
+
+ zf_writeb(PULSE_LEN, 0xff);
+
+ zf_set_timer(ZF_CTIMEOUT, WD1);
+
+ /* user land ping */
+ next_heartbeat = jiffies + ZF_USER_TIMEO;
+
+ /* start the timer for internal ping */
+ mod_timer(&zf_timer, jiffies + ZF_HW_TIMEO);
+
+ /* start watchdog timer */
+ ctrl_reg = zf_get_control();
+ ctrl_reg |= (ENABLE_WD1|zf_action);
+ zf_set_control(ctrl_reg);
+ spin_unlock_irqrestore(&zf_port_lock, flags);
+
+ printk(KERN_INFO PFX ": Watchdog timer is now enabled\n");
+}
+
+
+static void zf_ping(unsigned long data)
+{
+ unsigned int ctrl_reg = 0;
+ unsigned long flags;
+
+ zf_writeb(COUNTER_2, 0xff);
+
+ if(time_before(jiffies, next_heartbeat)){
+
+ dprintk("time_before: %ld\n", next_heartbeat - jiffies);
+
+ /*
+ * reset event is activated by transition from 0 to 1 on
+ * RESET_WD1 bit and we assume that it is already zero...
+ */
+
+ spin_lock_irqsave(&zf_port_lock, flags);
+ ctrl_reg = zf_get_control();
+ ctrl_reg |= RESET_WD1;
+ zf_set_control(ctrl_reg);
+
+ /* ...and nothing changes until here */
+ ctrl_reg &= ~(RESET_WD1);
+ zf_set_control(ctrl_reg);
+ spin_unlock_irqrestore(&zf_port_lock, flags);
+
+ mod_timer(&zf_timer, jiffies + ZF_HW_TIMEO);
+ }else{
+ printk(KERN_CRIT PFX ": I will reset your machine\n");
+ }
+}
+
+static ssize_t zf_write(struct file *file, const char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ /* See if we got the magic character */
+ if(count){
+
+ /*
+ * no need to check for close confirmation
+ * no way to disable watchdog ;)
+ */
+ if (!nowayout) {
+ size_t ofs;
+
+ /*
+ * note: just in case someone wrote the magic character
+ * five months ago...
+ */
+ zf_expect_close = 0;
+
+ /* now scan */
+ for (ofs = 0; ofs != count; ofs++){
+ char c;
+ if (get_user(c, buf + ofs))
+ return -EFAULT;
+ if (c == 'V'){
+ zf_expect_close = 42;
+ dprintk("zf_expect_close = 42\n");
+ }
+ }
+ }
+
+ /*
+ * Well, anyhow someone wrote to us,
+ * we should return that favour
+ */
+ next_heartbeat = jiffies + ZF_USER_TIMEO;
+ dprintk("user ping at %ld\n", jiffies);
+
+ }
+
+ return count;
+}
+
+static int zf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &zf_info, sizeof(zf_info)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ zf_ping(0);
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+static int zf_open(struct inode *inode, struct file *file)
+{
+ spin_lock(&zf_lock);
+ if(test_and_set_bit(0, &zf_is_open)) {
+ spin_unlock(&zf_lock);
+ return -EBUSY;
+ }
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ spin_unlock(&zf_lock);
+
+ zf_timer_on();
+
+ return nonseekable_open(inode, file);
+}
+
+static int zf_close(struct inode *inode, struct file *file)
+{
+ if(zf_expect_close == 42){
+ zf_timer_off();
+ } else {
+ del_timer(&zf_timer);
+ printk(KERN_ERR PFX ": device file closed unexpectedly. Will not stop the WDT!\n");
+ }
+
+ spin_lock(&zf_lock);
+ clear_bit(0, &zf_is_open);
+ spin_unlock(&zf_lock);
+
+ zf_expect_close = 0;
+
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int zf_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code == SYS_DOWN || code == SYS_HALT){
+ zf_timer_off();
+ }
+
+ return NOTIFY_DONE;
+}
+
+
+
+
+static const struct file_operations zf_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = zf_write,
+ .ioctl = zf_ioctl,
+ .open = zf_open,
+ .release = zf_close,
+};
+
+static struct miscdevice zf_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &zf_fops,
+};
+
+
+/*
+ * The device needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+static struct notifier_block zf_notifier = {
+ .notifier_call = zf_notify_sys,
+};
+
+static void __init zf_show_action(int act)
+{
+ char *str[] = { "RESET", "SMI", "NMI", "SCI" };
+
+ printk(KERN_INFO PFX ": Watchdog using action = %s\n", str[act]);
+}
+
+static int __init zf_init(void)
+{
+ int ret;
+
+ printk(KERN_INFO PFX ": MachZ ZF-Logic Watchdog driver initializing.\n");
+
+ ret = zf_get_ZFL_version();
+ if ((!ret) || (ret == 0xffff)) {
+ printk(KERN_WARNING PFX ": no ZF-Logic found\n");
+ return -ENODEV;
+ }
+
+ if((action <= 3) && (action >= 0)){
+ zf_action = zf_action>>action;
+ } else
+ action = 0;
+
+ zf_show_action(action);
+
+ spin_lock_init(&zf_lock);
+ spin_lock_init(&zf_port_lock);
+
+ if(!request_region(ZF_IOBASE, 3, "MachZ ZFL WDT")){
+ printk(KERN_ERR "cannot reserve I/O ports at %d\n",
+ ZF_IOBASE);
+ ret = -EBUSY;
+ goto no_region;
+ }
+
+ ret = register_reboot_notifier(&zf_notifier);
+ if(ret){
+ printk(KERN_ERR "can't register reboot notifier (err=%d)\n",
+ ret);
+ goto no_reboot;
+ }
+
+ ret = misc_register(&zf_miscdev);
+ if (ret){
+ printk(KERN_ERR "can't misc_register on minor=%d\n",
+ WATCHDOG_MINOR);
+ goto no_misc;
+ }
+
+ zf_set_status(0);
+ zf_set_control(0);
+
+ return 0;
+
+no_misc:
+ unregister_reboot_notifier(&zf_notifier);
+no_reboot:
+ release_region(ZF_IOBASE, 3);
+no_region:
+ return ret;
+}
+
+
+static void __exit zf_exit(void)
+{
+ zf_timer_off();
+
+ misc_deregister(&zf_miscdev);
+ unregister_reboot_notifier(&zf_notifier);
+ release_region(ZF_IOBASE, 3);
+}
+
+module_init(zf_init);
+module_exit(zf_exit);
--- /dev/null
+/*
+ * MixCom Watchdog: A Simple Hardware Watchdog Device
+ * Based on Softdog driver by Alan Cox and PC Watchdog driver by Ken Hollis
+ *
+ * Author: Gergely Madarasz <gorgo@itc.hu>
+ *
+ * Copyright (c) 1999 ITConsult-Pro Co. <info@itc.hu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Version 0.1 (99/04/15):
+ * - first version
+ *
+ * Version 0.2 (99/06/16):
+ * - added kernel timer watchdog ping after close
+ * since the hardware does not support watchdog shutdown
+ *
+ * Version 0.3 (99/06/21):
+ * - added WDIOC_GETSTATUS and WDIOC_GETSUPPORT ioctl calls
+ *
+ * Version 0.3.1 (99/06/22):
+ * - allow module removal while internal timer is active,
+ * print warning about probable reset
+ *
+ * Version 0.4 (99/11/15):
+ * - support for one more type board
+ *
+ * Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com>
+ * - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ *
+ * Version 0.6 (2002/04/12): Rob Radez <rob@osinvestor.com>
+ * - make mixcomwd_opened unsigned,
+ * removed lock_kernel/unlock_kernel from mixcomwd_release,
+ * modified ioctl a bit to conform to API
+ *
+ */
+
+#define VERSION "0.6"
+#define WATCHDOG_NAME "mixcomwd"
+#define PFX WATCHDOG_NAME ": "
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/ioport.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+/*
+ * We have two types of cards that can be probed:
+ * 1) The Mixcom cards: these cards can be found at addresses
+ * 0x180, 0x280, 0x380 with an additional offset of 0xc10.
+ * (Or 0xd90, 0xe90, 0xf90).
+ * 2) The FlashCOM cards: these cards can be set up at
+ * 0x300 -> 0x378, in 0x8 jumps with an offset of 0x04.
+ * (Or 0x304 -> 0x37c in 0x8 jumps).
+ * Each card has it's own ID.
+ */
+#define MIXCOM_ID 0x11
+#define FLASHCOM_ID 0x18
+static struct {
+ int ioport;
+ int id;
+} mixcomwd_io_info[] __devinitdata = {
+ /* The Mixcom cards */
+ {0x0d90, MIXCOM_ID},
+ {0x0e90, MIXCOM_ID},
+ {0x0f90, MIXCOM_ID},
+ /* The FlashCOM cards */
+ {0x0304, FLASHCOM_ID},
+ {0x030c, FLASHCOM_ID},
+ {0x0314, FLASHCOM_ID},
+ {0x031c, FLASHCOM_ID},
+ {0x0324, FLASHCOM_ID},
+ {0x032c, FLASHCOM_ID},
+ {0x0334, FLASHCOM_ID},
+ {0x033c, FLASHCOM_ID},
+ {0x0344, FLASHCOM_ID},
+ {0x034c, FLASHCOM_ID},
+ {0x0354, FLASHCOM_ID},
+ {0x035c, FLASHCOM_ID},
+ {0x0364, FLASHCOM_ID},
+ {0x036c, FLASHCOM_ID},
+ {0x0374, FLASHCOM_ID},
+ {0x037c, FLASHCOM_ID},
+ /* The end of the list */
+ {0x0000, 0},
+};
+
+static void mixcomwd_timerfun(unsigned long d);
+
+static unsigned long mixcomwd_opened; /* long req'd for setbit --RR */
+
+static int watchdog_port;
+static int mixcomwd_timer_alive;
+static DEFINE_TIMER(mixcomwd_timer, mixcomwd_timerfun, 0, 0);
+static char expect_close;
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static void mixcomwd_ping(void)
+{
+ outb_p(55,watchdog_port);
+ return;
+}
+
+static void mixcomwd_timerfun(unsigned long d)
+{
+ mixcomwd_ping();
+
+ mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+
+static int mixcomwd_open(struct inode *inode, struct file *file)
+{
+ if(test_and_set_bit(0,&mixcomwd_opened)) {
+ return -EBUSY;
+ }
+ mixcomwd_ping();
+
+ if (nowayout) {
+ /*
+ * fops_get() code via open() has already done
+ * a try_module_get() so it is safe to do the
+ * __module_get().
+ */
+ __module_get(THIS_MODULE);
+ } else {
+ if(mixcomwd_timer_alive) {
+ del_timer(&mixcomwd_timer);
+ mixcomwd_timer_alive=0;
+ }
+ }
+ return nonseekable_open(inode, file);
+}
+
+static int mixcomwd_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ if(mixcomwd_timer_alive) {
+ printk(KERN_ERR PFX "release called while internal timer alive");
+ return -EBUSY;
+ }
+ mixcomwd_timer_alive=1;
+ mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
+ } else {
+ printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ }
+
+ clear_bit(0,&mixcomwd_opened);
+ expect_close=0;
+ return 0;
+}
+
+
+static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+{
+ if(len)
+ {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ mixcomwd_ping();
+ }
+ return len;
+}
+
+static int mixcomwd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int status;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "MixCOM watchdog",
+ };
+
+ switch(cmd)
+ {
+ case WDIOC_GETSTATUS:
+ status=mixcomwd_opened;
+ if (!nowayout) {
+ status|=mixcomwd_timer_alive;
+ }
+ if (copy_to_user(p, &status, sizeof(int))) {
+ return -EFAULT;
+ }
+ break;
+ case WDIOC_GETBOOTSTATUS:
+ if (copy_to_user(p, &status, sizeof(int))) {
+ return -EFAULT;
+ }
+ break;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident))) {
+ return -EFAULT;
+ }
+ break;
+ case WDIOC_KEEPALIVE:
+ mixcomwd_ping();
+ break;
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static const struct file_operations mixcomwd_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mixcomwd_write,
+ .ioctl = mixcomwd_ioctl,
+ .open = mixcomwd_open,
+ .release = mixcomwd_release,
+};
+
+static struct miscdevice mixcomwd_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mixcomwd_fops,
+};
+
+static int __init checkcard(int port, int card_id)
+{
+ int id;
+
+ if (!request_region(port, 1, "MixCOM watchdog")) {
+ return 0;
+ }
+
+ id=inb_p(port);
+ if (card_id==MIXCOM_ID)
+ id &= 0x3f;
+
+ if (id!=card_id) {
+ release_region(port, 1);
+ return 0;
+ }
+ return 1;
+}
+
+static int __init mixcomwd_init(void)
+{
+ int i;
+ int ret;
+ int found=0;
+
+ for (i = 0; !found && mixcomwd_io_info[i].ioport != 0; i++) {
+ if (checkcard(mixcomwd_io_info[i].ioport,
+ mixcomwd_io_info[i].id)) {
+ found = 1;
+ watchdog_port = mixcomwd_io_info[i].ioport;
+ }
+ }
+
+ if (!found) {
+ printk(KERN_ERR PFX "No card detected, or port not available.\n");
+ return -ENODEV;
+ }
+
+ ret = misc_register(&mixcomwd_miscdev);
+ if (ret)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto error_misc_register_watchdog;
+ }
+
+ printk(KERN_INFO "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
+ VERSION, watchdog_port);
+
+ return 0;
+
+error_misc_register_watchdog:
+ release_region(watchdog_port, 1);
+ watchdog_port = 0x0000;
+ return ret;
+}
+
+static void __exit mixcomwd_exit(void)
+{
+ if (!nowayout) {
+ if(mixcomwd_timer_alive) {
+ printk(KERN_WARNING PFX "I quit now, hardware will"
+ " probably reboot!\n");
+ del_timer_sync(&mixcomwd_timer);
+ mixcomwd_timer_alive=0;
+ }
+ }
+ misc_deregister(&mixcomwd_miscdev);
+ release_region(watchdog_port,1);
+}
+
+module_init(mixcomwd_init);
+module_exit(mixcomwd_exit);
+
+MODULE_AUTHOR("Gergely Madarasz <gorgo@itc.hu>");
+MODULE_DESCRIPTION("MixCom Watchdog driver");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <asm/of_platform.h>
+#include <asm/uaccess.h>
+#include <asm/mpc52xx.h>
+
+
+#define GPT_MODE_WDT (1<<15)
+#define GPT_MODE_CE (1<<12)
+#define GPT_MODE_MS_TIMER (0x4)
+
+
+struct mpc5200_wdt {
+ unsigned count; /* timer ticks before watchdog kicks in */
+ long ipb_freq;
+ struct miscdevice miscdev;
+ struct resource mem;
+ struct mpc52xx_gpt __iomem *regs;
+ spinlock_t io_lock;
+};
+
+/* is_active stores wether or not the /dev/watchdog device is opened */
+static unsigned long is_active;
+
+/* misc devices don't provide a way, to get back to 'dev' or 'miscdev' from
+ * file operations, which sucks. But there can be max 1 watchdog anyway, so...
+ */
+static struct mpc5200_wdt *wdt_global;
+
+
+/* helper to calculate timeout in timer counts */
+static void mpc5200_wdt_set_timeout(struct mpc5200_wdt *wdt, int timeout)
+{
+ /* use biggest prescaler of 64k */
+ wdt->count = (wdt->ipb_freq + 0xffff) / 0x10000 * timeout;
+
+ if (wdt->count > 0xffff)
+ wdt->count = 0xffff;
+}
+/* return timeout in seconds (calculated from timer count) */
+static int mpc5200_wdt_get_timeout(struct mpc5200_wdt *wdt)
+{
+ return wdt->count * 0x10000 / wdt->ipb_freq;
+}
+
+
+/* watchdog operations */
+static int mpc5200_wdt_start(struct mpc5200_wdt *wdt)
+{
+ spin_lock(&wdt->io_lock);
+ /* disable */
+ out_be32(&wdt->regs->mode, 0);
+ /* set timeout, with maximum prescaler */
+ out_be32(&wdt->regs->count, 0x0 | wdt->count);
+ /* enable watchdog */
+ out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT | GPT_MODE_MS_TIMER);
+ spin_unlock(&wdt->io_lock);
+
+ return 0;
+}
+static int mpc5200_wdt_ping(struct mpc5200_wdt *wdt)
+{
+ spin_lock(&wdt->io_lock);
+ /* writing A5 to OCPW resets the watchdog */
+ out_be32(&wdt->regs->mode, 0xA5000000 | (0xffffff & in_be32(&wdt->regs->mode)));
+ spin_unlock(&wdt->io_lock);
+ return 0;
+}
+static int mpc5200_wdt_stop(struct mpc5200_wdt *wdt)
+{
+ spin_lock(&wdt->io_lock);
+ /* disable */
+ out_be32(&wdt->regs->mode, 0);
+ spin_unlock(&wdt->io_lock);
+ return 0;
+}
+
+
+/* file operations */
+static ssize_t mpc5200_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ struct mpc5200_wdt *wdt = file->private_data;
+ mpc5200_wdt_ping(wdt);
+ return 0;
+}
+static struct watchdog_info mpc5200_wdt_info = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "mpc5200 watchdog on GPT0",
+};
+static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct mpc5200_wdt *wdt = file->private_data;
+ int __user *data = (int __user *)arg;
+ int timeout;
+ int ret = 0;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user(data, &mpc5200_wdt_info,
+ sizeof(mpc5200_wdt_info));
+ if (ret)
+ ret = -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(0, data);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ mpc5200_wdt_ping(wdt);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(timeout, data);
+ if (ret)
+ break;
+ mpc5200_wdt_set_timeout(wdt, timeout);
+ mpc5200_wdt_start(wdt);
+ /* fall through and return the timeout */
+
+ case WDIOC_GETTIMEOUT:
+ timeout = mpc5200_wdt_get_timeout(wdt);
+ ret = put_user(timeout, data);
+ break;
+
+ default:
+ ret = -ENOTTY;
+ }
+ return ret;
+}
+static int mpc5200_wdt_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &is_active))
+ return -EBUSY;
+
+ /* Set and activate the watchdog */
+ mpc5200_wdt_set_timeout(wdt_global, 30);
+ mpc5200_wdt_start(wdt_global);
+ file->private_data = wdt_global;
+ return nonseekable_open(inode, file);
+}
+static int mpc5200_wdt_release(struct inode *inode, struct file *file)
+{
+#if WATCHDOG_NOWAYOUT == 0
+ struct mpc5200_wdt *wdt = file->private_data;
+ mpc5200_wdt_stop(wdt);
+ wdt->count = 0; /* == disabled */
+#endif
+ clear_bit(0, &is_active);
+ return 0;
+}
+
+static struct file_operations mpc5200_wdt_fops = {
+ .owner = THIS_MODULE,
+ .write = mpc5200_wdt_write,
+ .ioctl = mpc5200_wdt_ioctl,
+ .open = mpc5200_wdt_open,
+ .release = mpc5200_wdt_release,
+};
+
+/* module operations */
+static int mpc5200_wdt_probe(struct of_device *op, const struct of_device_id *match)
+{
+ struct mpc5200_wdt *wdt;
+ int err;
+ const void *has_wdt;
+ int size;
+
+ has_wdt = of_get_property(op->node, "has-wdt", NULL);
+ if (!has_wdt)
+ return -ENODEV;
+
+ wdt = kzalloc(sizeof(*wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
+
+ wdt->ipb_freq = mpc52xx_find_ipb_freq(op->node);
+
+ err = of_address_to_resource(op->node, 0, &wdt->mem);
+ if (err)
+ goto out_free;
+ size = wdt->mem.end - wdt->mem.start + 1;
+ if (!request_mem_region(wdt->mem.start, size, "mpc5200_wdt")) {
+ err = -ENODEV;
+ goto out_free;
+ }
+ wdt->regs = ioremap(wdt->mem.start, size);
+ if (!wdt->regs) {
+ err = -ENODEV;
+ goto out_release;
+ }
+
+ dev_set_drvdata(&op->dev, wdt);
+ spin_lock_init(&wdt->io_lock);
+
+ wdt->miscdev = (struct miscdevice) {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mpc5200_wdt_fops,
+ .parent = &op->dev,
+ };
+ wdt_global = wdt;
+ err = misc_register(&wdt->miscdev);
+ if (!err)
+ return 0;
+
+ iounmap(wdt->regs);
+ out_release:
+ release_mem_region(wdt->mem.start, size);
+ out_free:
+ kfree(wdt);
+ return err;
+}
+
+static int mpc5200_wdt_remove(struct of_device *op)
+{
+ struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
+
+ mpc5200_wdt_stop(wdt);
+ misc_deregister(&wdt->miscdev);
+ iounmap(wdt->regs);
+ release_mem_region(wdt->mem.start, wdt->mem.end - wdt->mem.start + 1);
+ kfree(wdt);
+
+ return 0;
+}
+static int mpc5200_wdt_suspend(struct of_device *op, pm_message_t state)
+{
+ struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
+ mpc5200_wdt_stop(wdt);
+ return 0;
+}
+static int mpc5200_wdt_resume(struct of_device *op)
+{
+ struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
+ if (wdt->count)
+ mpc5200_wdt_start(wdt);
+ return 0;
+}
+static int mpc5200_wdt_shutdown(struct of_device *op)
+{
+ struct mpc5200_wdt *wdt = dev_get_drvdata(&op->dev);
+ mpc5200_wdt_stop(wdt);
+ return 0;
+}
+
+static struct of_device_id mpc5200_wdt_match[] = {
+ { .compatible = "mpc5200-gpt", },
+ {},
+};
+static struct of_platform_driver mpc5200_wdt_driver = {
+ .owner = THIS_MODULE,
+ .name = "mpc5200-gpt-wdt",
+ .match_table = mpc5200_wdt_match,
+ .probe = mpc5200_wdt_probe,
+ .remove = mpc5200_wdt_remove,
+ .suspend = mpc5200_wdt_suspend,
+ .resume = mpc5200_wdt_resume,
+ .shutdown = mpc5200_wdt_shutdown,
+};
+
+
+static int __init mpc5200_wdt_init(void)
+{
+ return of_register_platform_driver(&mpc5200_wdt_driver);
+}
+
+static void __exit mpc5200_wdt_exit(void)
+{
+ of_unregister_platform_driver(&mpc5200_wdt_driver);
+}
+
+module_init(mpc5200_wdt_init);
+module_exit(mpc5200_wdt_exit);
+
+MODULE_AUTHOR("Domen Puncer <domen.puncer@telargo.com>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * mpc83xx_wdt.c - MPC83xx watchdog userspace interface
+ *
+ * Authors: Dave Updegraff <dave@cray.org>
+ * Kumar Gala <galak@kernel.crashing.org>
+ * Attribution: from 83xx_wst: Florian Schirmer <jolt@tuxbox.org>
+ * ..and from sc520_wdt
+ *
+ * Note: it appears that you can only actually ENABLE or DISABLE the thing
+ * once after POR. Once enabled, you cannot disable, and vice versa.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/watchdog.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+struct mpc83xx_wdt {
+ __be32 res0;
+ __be32 swcrr; /* System watchdog control register */
+#define SWCRR_SWTC 0xFFFF0000 /* Software Watchdog Time Count. */
+#define SWCRR_SWEN 0x00000004 /* Watchdog Enable bit. */
+#define SWCRR_SWRI 0x00000002 /* Software Watchdog Reset/Interrupt Select bit.*/
+#define SWCRR_SWPR 0x00000001 /* Software Watchdog Counter Prescale bit. */
+ __be32 swcnr; /* System watchdog count register */
+ u8 res1[2];
+ __be16 swsrr; /* System watchdog service register */
+ u8 res2[0xF0];
+};
+
+static struct mpc83xx_wdt __iomem *wd_base;
+
+static u16 timeout = 0xffff;
+module_param(timeout, ushort, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in ticks. (0<timeout<65536, default=65535");
+
+static int reset = 1;
+module_param(reset, bool, 0);
+MODULE_PARM_DESC(reset, "Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset");
+
+/*
+ * We always prescale, but if someone really doesn't want to they can set this
+ * to 0
+ */
+static int prescale = 1;
+static unsigned int timeout_sec;
+
+static unsigned long wdt_is_open;
+static spinlock_t wdt_spinlock;
+
+static void mpc83xx_wdt_keepalive(void)
+{
+ /* Ping the WDT */
+ spin_lock(&wdt_spinlock);
+ out_be16(&wd_base->swsrr, 0x556c);
+ out_be16(&wd_base->swsrr, 0xaa39);
+ spin_unlock(&wdt_spinlock);
+}
+
+static ssize_t mpc83xx_wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count)
+ mpc83xx_wdt_keepalive();
+ return count;
+}
+
+static int mpc83xx_wdt_open(struct inode *inode, struct file *file)
+{
+ u32 tmp = SWCRR_SWEN;
+ if (test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+
+ /* Once we start the watchdog we can't stop it */
+ __module_get(THIS_MODULE);
+
+ /* Good, fire up the show */
+ if (prescale)
+ tmp |= SWCRR_SWPR;
+ if (reset)
+ tmp |= SWCRR_SWRI;
+
+ tmp |= timeout << 16;
+
+ out_be32(&wd_base->swcrr, tmp);
+
+ return nonseekable_open(inode, file);
+}
+
+static int mpc83xx_wdt_release(struct inode *inode, struct file *file)
+{
+ printk(KERN_CRIT "Unexpected close, not stopping watchdog!\n");
+ mpc83xx_wdt_keepalive();
+ clear_bit(0, &wdt_is_open);
+ return 0;
+}
+
+static int mpc83xx_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = "MPC83xx",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ mpc83xx_wdt_keepalive();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout_sec, p);
+ default:
+ return -ENOTTY;
+ }
+}
+
+static const struct file_operations mpc83xx_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mpc83xx_wdt_write,
+ .ioctl = mpc83xx_wdt_ioctl,
+ .open = mpc83xx_wdt_open,
+ .release = mpc83xx_wdt_release,
+};
+
+static struct miscdevice mpc83xx_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mpc83xx_wdt_fops,
+};
+
+static int __devinit mpc83xx_wdt_probe(struct platform_device *dev)
+{
+ struct resource *r;
+ int ret;
+ unsigned int *freq = dev->dev.platform_data;
+
+ /* get a pointer to the register memory */
+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+
+ if (!r) {
+ ret = -ENODEV;
+ goto err_out;
+ }
+
+ wd_base = ioremap(r->start, sizeof (struct mpc83xx_wdt));
+
+ if (wd_base == NULL) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ ret = misc_register(&mpc83xx_wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "cannot register miscdev on minor=%d "
+ "(err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_unmap;
+ }
+
+ /* Calculate the timeout in seconds */
+ if (prescale)
+ timeout_sec = (timeout * 0x10000) / (*freq);
+ else
+ timeout_sec = timeout / (*freq);
+
+ printk(KERN_INFO "WDT driver for MPC83xx initialized. "
+ "mode:%s timeout=%d (%d seconds)\n",
+ reset ? "reset":"interrupt", timeout, timeout_sec);
+
+ spin_lock_init(&wdt_spinlock);
+
+ return 0;
+
+err_unmap:
+ iounmap(wd_base);
+err_out:
+ return ret;
+}
+
+static int __devexit mpc83xx_wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&mpc83xx_wdt_miscdev);
+ iounmap(wd_base);
+
+ return 0;
+}
+
+static struct platform_driver mpc83xx_wdt_driver = {
+ .probe = mpc83xx_wdt_probe,
+ .remove = __devexit_p(mpc83xx_wdt_remove),
+ .driver = {
+ .name = "mpc83xx_wdt",
+ },
+};
+
+static int __init mpc83xx_wdt_init(void)
+{
+ return platform_driver_register(&mpc83xx_wdt_driver);
+}
+
+static void __exit mpc83xx_wdt_exit(void)
+{
+ platform_driver_unregister(&mpc83xx_wdt_driver);
+}
+
+module_init(mpc83xx_wdt_init);
+module_exit(mpc83xx_wdt_exit);
+
+MODULE_AUTHOR("Dave Updegraff, Kumar Gala");
+MODULE_DESCRIPTION("Driver for watchdog timer in MPC83xx uProcessor");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * mpc8xx_wdt.c - MPC8xx watchdog userspace interface
+ *
+ * Author: Florian Schirmer <jolt@tuxbox.org>
+ *
+ * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/watchdog.h>
+#include <asm/8xx_immap.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <syslib/m8xx_wdt.h>
+
+static unsigned long wdt_opened;
+static int wdt_status;
+
+static void mpc8xx_wdt_handler_disable(void)
+{
+ volatile uint __iomem *piscr;
+ piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
+
+ if (!m8xx_has_internal_rtc)
+ m8xx_wdt_stop_timer();
+ else
+ out_be32(piscr, in_be32(piscr) & ~(PISCR_PIE | PISCR_PTE));
+
+ printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler deactivated\n");
+}
+
+static void mpc8xx_wdt_handler_enable(void)
+{
+ volatile uint __iomem *piscr;
+ piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
+
+ if (!m8xx_has_internal_rtc)
+ m8xx_wdt_install_timer();
+ else
+ out_be32(piscr, in_be32(piscr) | PISCR_PIE | PISCR_PTE);
+
+ printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler activated\n");
+}
+
+static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &wdt_opened))
+ return -EBUSY;
+
+ m8xx_wdt_reset();
+ mpc8xx_wdt_handler_disable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
+{
+ m8xx_wdt_reset();
+
+#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
+ mpc8xx_wdt_handler_enable();
+#endif
+
+ clear_bit(0, &wdt_opened);
+
+ return 0;
+}
+
+static ssize_t mpc8xx_wdt_write(struct file *file, const char *data, size_t len,
+ loff_t * ppos)
+{
+ if (len)
+ m8xx_wdt_reset();
+
+ return len;
+}
+
+static int mpc8xx_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int timeout;
+ static struct watchdog_info info = {
+ .options = WDIOF_KEEPALIVEPING,
+ .firmware_version = 0,
+ .identity = "MPC8xx watchdog",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user((void *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ if (put_user(wdt_status, (int *)arg))
+ return -EFAULT;
+ wdt_status &= ~WDIOF_KEEPALIVEPING;
+ break;
+
+ case WDIOC_GETTEMP:
+ return -EOPNOTSUPP;
+
+ case WDIOC_SETOPTIONS:
+ return -EOPNOTSUPP;
+
+ case WDIOC_KEEPALIVE:
+ m8xx_wdt_reset();
+ wdt_status |= WDIOF_KEEPALIVEPING;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ return -EOPNOTSUPP;
+
+ case WDIOC_GETTIMEOUT:
+ timeout = m8xx_wdt_get_timeout();
+ if (put_user(timeout, (int *)arg))
+ return -EFAULT;
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+static const struct file_operations mpc8xx_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mpc8xx_wdt_write,
+ .ioctl = mpc8xx_wdt_ioctl,
+ .open = mpc8xx_wdt_open,
+ .release = mpc8xx_wdt_release,
+};
+
+static struct miscdevice mpc8xx_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mpc8xx_wdt_fops,
+};
+
+static int __init mpc8xx_wdt_init(void)
+{
+ return misc_register(&mpc8xx_wdt_miscdev);
+}
+
+static void __exit mpc8xx_wdt_exit(void)
+{
+ misc_deregister(&mpc8xx_wdt_miscdev);
+
+ m8xx_wdt_reset();
+ mpc8xx_wdt_handler_enable();
+}
+
+module_init(mpc8xx_wdt_init);
+module_exit(mpc8xx_wdt_exit);
+
+MODULE_AUTHOR("Florian Schirmer <jolt@tuxbox.org>");
+MODULE_DESCRIPTION("MPC8xx watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for the mpcore watchdog timer
+ *
+ * (c) Copyright 2004 ARM Limited
+ *
+ * Based on the SoftDog driver:
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/hardware/arm_twd.h>
+#include <asm/uaccess.h>
+
+struct mpcore_wdt {
+ unsigned long timer_alive;
+ struct device *dev;
+ void __iomem *base;
+ int irq;
+ unsigned int perturb;
+ char expect_close;
+};
+
+static struct platform_device *mpcore_wdt_dev;
+
+extern unsigned int mpcore_timer_rate;
+
+#define TIMER_MARGIN 60
+static int mpcore_margin = TIMER_MARGIN;
+module_param(mpcore_margin, int, 0);
+MODULE_PARM_DESC(mpcore_margin, "MPcore timer margin in seconds. (0<mpcore_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define ONLY_TESTING 0
+static int mpcore_noboot = ONLY_TESTING;
+module_param(mpcore_noboot, int, 0);
+MODULE_PARM_DESC(mpcore_noboot, "MPcore watchdog action, set to 1 to ignore reboots, 0 to reboot (default=" __MODULE_STRING(ONLY_TESTING) ")");
+
+/*
+ * This is the interrupt handler. Note that we only use this
+ * in testing mode, so don't actually do a reboot here.
+ */
+static irqreturn_t mpcore_wdt_fire(int irq, void *arg)
+{
+ struct mpcore_wdt *wdt = arg;
+
+ /* Check it really was our interrupt */
+ if (readl(wdt->base + TWD_WDOG_INTSTAT)) {
+ dev_printk(KERN_CRIT, wdt->dev, "Triggered - Reboot ignored.\n");
+
+ /* Clear the interrupt on the watchdog */
+ writel(1, wdt->base + TWD_WDOG_INTSTAT);
+
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+/*
+ * mpcore_wdt_keepalive - reload the timer
+ *
+ * Note that the spec says a DIFFERENT value must be written to the reload
+ * register each time. The "perturb" variable deals with this by adding 1
+ * to the count every other time the function is called.
+ */
+static void mpcore_wdt_keepalive(struct mpcore_wdt *wdt)
+{
+ unsigned int count;
+
+ /* Assume prescale is set to 256 */
+ count = (mpcore_timer_rate / 256) * mpcore_margin;
+
+ /* Reload the counter */
+ writel(count + wdt->perturb, wdt->base + TWD_WDOG_LOAD);
+
+ wdt->perturb = wdt->perturb ? 0 : 1;
+}
+
+static void mpcore_wdt_stop(struct mpcore_wdt *wdt)
+{
+ writel(0x12345678, wdt->base + TWD_WDOG_DISABLE);
+ writel(0x87654321, wdt->base + TWD_WDOG_DISABLE);
+ writel(0x0, wdt->base + TWD_WDOG_CONTROL);
+}
+
+static void mpcore_wdt_start(struct mpcore_wdt *wdt)
+{
+ dev_printk(KERN_INFO, wdt->dev, "enabling watchdog.\n");
+
+ /* This loads the count register but does NOT start the count yet */
+ mpcore_wdt_keepalive(wdt);
+
+ if (mpcore_noboot) {
+ /* Enable watchdog - prescale=256, watchdog mode=0, enable=1 */
+ writel(0x0000FF01, wdt->base + TWD_WDOG_CONTROL);
+ } else {
+ /* Enable watchdog - prescale=256, watchdog mode=1, enable=1 */
+ writel(0x0000FF09, wdt->base + TWD_WDOG_CONTROL);
+ }
+}
+
+static int mpcore_wdt_set_heartbeat(int t)
+{
+ if (t < 0x0001 || t > 0xFFFF)
+ return -EINVAL;
+
+ mpcore_margin = t;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+static int mpcore_wdt_open(struct inode *inode, struct file *file)
+{
+ struct mpcore_wdt *wdt = platform_get_drvdata(mpcore_wdt_dev);
+
+ if (test_and_set_bit(0, &wdt->timer_alive))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ file->private_data = wdt;
+
+ /*
+ * Activate timer
+ */
+ mpcore_wdt_start(wdt);
+
+ return nonseekable_open(inode, file);
+}
+
+static int mpcore_wdt_release(struct inode *inode, struct file *file)
+{
+ struct mpcore_wdt *wdt = file->private_data;
+
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+ if (wdt->expect_close == 42) {
+ mpcore_wdt_stop(wdt);
+ } else {
+ dev_printk(KERN_CRIT, wdt->dev, "unexpected close, not stopping watchdog!\n");
+ mpcore_wdt_keepalive(wdt);
+ }
+ clear_bit(0, &wdt->timer_alive);
+ wdt->expect_close = 0;
+ return 0;
+}
+
+static ssize_t mpcore_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ struct mpcore_wdt *wdt = file->private_data;
+
+ /*
+ * Refresh the timer.
+ */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ wdt->expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ wdt->expect_close = 42;
+ }
+ }
+ mpcore_wdt_keepalive(wdt);
+ }
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .identity = "MPcore Watchdog",
+};
+
+static int mpcore_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct mpcore_wdt *wdt = file->private_data;
+ int ret;
+ union {
+ struct watchdog_info ident;
+ int i;
+ } uarg;
+
+ if (_IOC_DIR(cmd) && _IOC_SIZE(cmd) > sizeof(uarg))
+ return -ENOTTY;
+
+ if (_IOC_DIR(cmd) & _IOC_WRITE) {
+ ret = copy_from_user(&uarg, (void __user *)arg, _IOC_SIZE(cmd));
+ if (ret)
+ return -EFAULT;
+ }
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ uarg.ident = ident;
+ ret = 0;
+ break;
+
+ case WDIOC_SETOPTIONS:
+ ret = -EINVAL;
+ if (uarg.i & WDIOS_DISABLECARD) {
+ mpcore_wdt_stop(wdt);
+ ret = 0;
+ }
+ if (uarg.i & WDIOS_ENABLECARD) {
+ mpcore_wdt_start(wdt);
+ ret = 0;
+ }
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ uarg.i = 0;
+ ret = 0;
+ break;
+
+ case WDIOC_KEEPALIVE:
+ mpcore_wdt_keepalive(wdt);
+ ret = 0;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = mpcore_wdt_set_heartbeat(uarg.i);
+ if (ret)
+ break;
+
+ mpcore_wdt_keepalive(wdt);
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ uarg.i = mpcore_margin;
+ ret = 0;
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ if (ret == 0 && _IOC_DIR(cmd) & _IOC_READ) {
+ ret = copy_to_user((void __user *)arg, &uarg, _IOC_SIZE(cmd));
+ if (ret)
+ ret = -EFAULT;
+ }
+ return ret;
+}
+
+/*
+ * System shutdown handler. Turn off the watchdog if we're
+ * restarting or halting the system.
+ */
+static void mpcore_wdt_shutdown(struct platform_device *dev)
+{
+ struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+
+ if (system_state == SYSTEM_RESTART || system_state == SYSTEM_HALT)
+ mpcore_wdt_stop(wdt);
+}
+
+/*
+ * Kernel Interfaces
+ */
+static const struct file_operations mpcore_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mpcore_wdt_write,
+ .ioctl = mpcore_wdt_ioctl,
+ .open = mpcore_wdt_open,
+ .release = mpcore_wdt_release,
+};
+
+static struct miscdevice mpcore_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mpcore_wdt_fops,
+};
+
+static int __devinit mpcore_wdt_probe(struct platform_device *dev)
+{
+ struct mpcore_wdt *wdt;
+ struct resource *res;
+ int ret;
+
+ /* We only accept one device, and it must have an id of -1 */
+ if (dev->id != -1)
+ return -ENODEV;
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENODEV;
+ goto err_out;
+ }
+
+ wdt = kzalloc(sizeof(struct mpcore_wdt), GFP_KERNEL);
+ if (!wdt) {
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ wdt->dev = &dev->dev;
+ wdt->irq = platform_get_irq(dev, 0);
+ if (wdt->irq < 0) {
+ ret = -ENXIO;
+ goto err_free;
+ }
+ wdt->base = ioremap(res->start, res->end - res->start + 1);
+ if (!wdt->base) {
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ mpcore_wdt_miscdev.parent = &dev->dev;
+ ret = misc_register(&mpcore_wdt_miscdev);
+ if (ret) {
+ dev_printk(KERN_ERR, _dev, "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_misc;
+ }
+
+ ret = request_irq(wdt->irq, mpcore_wdt_fire, IRQF_DISABLED, "mpcore_wdt", wdt);
+ if (ret) {
+ dev_printk(KERN_ERR, _dev, "cannot register IRQ%d for watchdog\n", wdt->irq);
+ goto err_irq;
+ }
+
+ mpcore_wdt_stop(wdt);
+ platform_set_drvdata(&dev->dev, wdt);
+ mpcore_wdt_dev = dev;
+
+ return 0;
+
+ err_irq:
+ misc_deregister(&mpcore_wdt_miscdev);
+ err_misc:
+ iounmap(wdt->base);
+ err_free:
+ kfree(wdt);
+ err_out:
+ return ret;
+}
+
+static int __devexit mpcore_wdt_remove(struct platform_device *dev)
+{
+ struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+
+ platform_set_drvdata(dev, NULL);
+
+ misc_deregister(&mpcore_wdt_miscdev);
+
+ mpcore_wdt_dev = NULL;
+
+ free_irq(wdt->irq, wdt);
+ iounmap(wdt->base);
+ kfree(wdt);
+ return 0;
+}
+
+static struct platform_driver mpcore_wdt_driver = {
+ .probe = mpcore_wdt_probe,
+ .remove = __devexit_p(mpcore_wdt_remove),
+ .shutdown = mpcore_wdt_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "mpcore_wdt",
+ },
+};
+
+static char banner[] __initdata = KERN_INFO "MPcore Watchdog Timer: 0.1. mpcore_noboot=%d mpcore_margin=%d sec (nowayout= %d)\n";
+
+static int __init mpcore_wdt_init(void)
+{
+ /*
+ * Check that the margin value is within it's range;
+ * if not reset to the default
+ */
+ if (mpcore_wdt_set_heartbeat(mpcore_margin)) {
+ mpcore_wdt_set_heartbeat(TIMER_MARGIN);
+ printk(KERN_INFO "mpcore_margin value must be 0<mpcore_margin<65536, using %d\n",
+ TIMER_MARGIN);
+ }
+
+ printk(banner, mpcore_noboot, mpcore_margin, nowayout);
+
+ return platform_driver_register(&mpcore_wdt_driver);
+}
+
+static void __exit mpcore_wdt_exit(void)
+{
+ platform_driver_unregister(&mpcore_wdt_driver);
+}
+
+module_init(mpcore_wdt_init);
+module_exit(mpcore_wdt_exit);
+
+MODULE_AUTHOR("ARM Limited");
+MODULE_DESCRIPTION("MPcore Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Driver for the MTX-1 Watchdog.
+ *
+ * (C) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved.
+ * http://www.4g-systems.biz
+ *
+ * (C) Copyright 2007 OpenWrt.org, Florian Fainelli <florian@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Michael Stickel nor 4G Systems admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 2005 4G Systems <info@4g-systems.biz>
+ *
+ * Release 0.01.
+ * Author: Michael Stickel michael.stickel@4g-systems.biz
+ *
+ * Release 0.02.
+ * Author: Florian Fainelli florian@openwrt.org
+ * use the Linux watchdog/timer APIs
+ *
+ * The Watchdog is configured to reset the MTX-1
+ * if it is not triggered for 100 seconds.
+ * It should not be triggered more often than 1.6 seconds.
+ *
+ * A timer triggers the watchdog every 5 seconds, until
+ * it is opened for the first time. After the first open
+ * it MUST be triggered every 2..95 seconds.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/timer.h>
+#include <linux/completion.h>
+#include <linux/jiffies.h>
+#include <linux/watchdog.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <asm/mach-au1x00/au1000.h>
+
+#define MTX1_WDT_INTERVAL (5 * HZ)
+
+static int ticks = 100 * HZ;
+
+static struct {
+ struct completion stop;
+ volatile int running;
+ struct timer_list timer;
+ volatile int queue;
+ int default_ticks;
+ unsigned long inuse;
+} mtx1_wdt_device;
+
+static void mtx1_wdt_trigger(unsigned long unused)
+{
+ u32 tmp;
+
+ if (mtx1_wdt_device.running)
+ ticks--;
+ /*
+ * toggle GPIO2_15
+ */
+ tmp = au_readl(GPIO2_DIR);
+ tmp = (tmp & ~(1<<15)) | ((~tmp) & (1<<15));
+ au_writel (tmp, GPIO2_DIR);
+
+ if (mtx1_wdt_device.queue && ticks)
+ mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
+ else {
+ complete(&mtx1_wdt_device.stop);
+ }
+}
+
+static void mtx1_wdt_reset(void)
+{
+ ticks = mtx1_wdt_device.default_ticks;
+}
+
+
+static void mtx1_wdt_start(void)
+{
+ if (!mtx1_wdt_device.queue) {
+ mtx1_wdt_device.queue = 1;
+ au_writel (au_readl(GPIO2_DIR) | (u32)(1<<15), GPIO2_DIR);
+ mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
+ }
+ mtx1_wdt_device.running++;
+}
+
+static int mtx1_wdt_stop(void)
+{
+ if (mtx1_wdt_device.queue) {
+ mtx1_wdt_device.queue = 0;
+ au_writel (au_readl(GPIO2_DIR) & ~((u32)(1<<15)), GPIO2_DIR);
+ }
+
+ ticks = mtx1_wdt_device.default_ticks;
+
+ return 0;
+}
+
+/* Filesystem functions */
+
+static int mtx1_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &mtx1_wdt_device.inuse))
+ return -EBUSY;
+
+ return nonseekable_open(inode, file);
+}
+
+
+static int mtx1_wdt_release(struct inode *inode, struct file *file)
+{
+ clear_bit(0, &mtx1_wdt_device.inuse);
+ return 0;
+}
+
+static int mtx1_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ unsigned int value;
+ static struct watchdog_info ident =
+ {
+ .options = WDIOF_CARDRESET,
+ .identity = "MTX-1 WDT",
+ };
+
+ switch(cmd) {
+ case WDIOC_KEEPALIVE:
+ mtx1_wdt_reset();
+ break;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ if ( copy_to_user(argp, &value, sizeof(int)) )
+ return -EFAULT;
+ break;
+ case WDIOC_GETSUPPORT:
+ if ( copy_to_user(argp, &ident, sizeof(ident)) )
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if ( copy_from_user(&value, argp, sizeof(int)) )
+ return -EFAULT;
+ switch(value) {
+ case WDIOS_ENABLECARD:
+ mtx1_wdt_start();
+ break;
+ case WDIOS_DISABLECARD:
+ return mtx1_wdt_stop();
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+
+static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+{
+ if (!count)
+ return -EIO;
+
+ mtx1_wdt_reset();
+ return count;
+}
+
+static struct file_operations mtx1_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = mtx1_wdt_ioctl,
+ .open = mtx1_wdt_open,
+ .write = mtx1_wdt_write,
+ .release = mtx1_wdt_release
+};
+
+
+static struct miscdevice mtx1_wdt_misc = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mtx1_wdt_fops
+};
+
+
+static int __init mtx1_wdt_init(void)
+{
+ int ret;
+
+ if ((ret = misc_register(&mtx1_wdt_misc)) < 0) {
+ printk(KERN_ERR " mtx-1_wdt : failed to register\n");
+ return ret;
+ }
+
+ init_completion(&mtx1_wdt_device.stop);
+ mtx1_wdt_device.queue = 0;
+
+ clear_bit(0, &mtx1_wdt_device.inuse);
+
+ setup_timer(&mtx1_wdt_device.timer, mtx1_wdt_trigger, 0L);
+
+ mtx1_wdt_device.default_ticks = ticks;
+
+ mtx1_wdt_start();
+
+ printk(KERN_INFO "MTX-1 Watchdog driver\n");
+
+ return 0;
+}
+
+static void __exit mtx1_wdt_exit(void)
+{
+ if (mtx1_wdt_device.queue) {
+ mtx1_wdt_device.queue = 0;
+ wait_for_completion(&mtx1_wdt_device.stop);
+ }
+ misc_deregister(&mtx1_wdt_misc);
+}
+
+module_init(mtx1_wdt_init);
+module_exit(mtx1_wdt_exit);
+
+MODULE_AUTHOR("Michael Stickel, Florian Fainelli");
+MODULE_DESCRIPTION("Driver for the MTX-1 watchdog");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * mv64x60_wdt.c - MV64X60 (Marvell Discovery) watchdog userspace interface
+ *
+ * Author: James Chapman <jchapman@katalix.com>
+ *
+ * Platform-specific setup code should configure the dog to generate
+ * interrupt or reset as required. This code only enables/disables
+ * and services the watchdog.
+ *
+ * Derived from mpc8xx_wdt.c, with the following copyright.
+ *
+ * 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/watchdog.h>
+#include <linux/platform_device.h>
+
+#include <linux/mv643xx.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define MV64x60_WDT_WDC_OFFSET 0
+
+/*
+ * The watchdog configuration register contains a pair of 2-bit fields,
+ * 1. a reload field, bits 27-26, which triggers a reload of
+ * the countdown register, and
+ * 2. an enable field, bits 25-24, which toggles between
+ * enabling and disabling the watchdog timer.
+ * Bit 31 is a read-only field which indicates whether the
+ * watchdog timer is currently enabled.
+ *
+ * The low 24 bits contain the timer reload value.
+ */
+#define MV64x60_WDC_ENABLE_SHIFT 24
+#define MV64x60_WDC_SERVICE_SHIFT 26
+#define MV64x60_WDC_ENABLED_SHIFT 31
+
+#define MV64x60_WDC_ENABLED_TRUE 1
+#define MV64x60_WDC_ENABLED_FALSE 0
+
+/* Flags bits */
+#define MV64x60_WDOG_FLAG_OPENED 0
+
+static unsigned long wdt_flags;
+static int wdt_status;
+static void __iomem *mv64x60_wdt_regs;
+static int mv64x60_wdt_timeout;
+static int mv64x60_wdt_count;
+static unsigned int bus_clk;
+static char expect_close;
+static DEFINE_SPINLOCK(mv64x60_wdt_spinlock);
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static int mv64x60_wdt_toggle_wdc(int enabled_predicate, int field_shift)
+{
+ u32 data;
+ u32 enabled;
+ int ret = 0;
+
+ spin_lock(&mv64x60_wdt_spinlock);
+ data = readl(mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
+ enabled = (data >> MV64x60_WDC_ENABLED_SHIFT) & 1;
+
+ /* only toggle the requested field if enabled state matches predicate */
+ if ((enabled ^ enabled_predicate) == 0) {
+ /* We write a 1, then a 2 -- to the appropriate field */
+ data = (1 << field_shift) | mv64x60_wdt_count;
+ writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
+
+ data = (2 << field_shift) | mv64x60_wdt_count;
+ writel(data, mv64x60_wdt_regs + MV64x60_WDT_WDC_OFFSET);
+ ret = 1;
+ }
+ spin_unlock(&mv64x60_wdt_spinlock);
+
+ return ret;
+}
+
+static void mv64x60_wdt_service(void)
+{
+ mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE,
+ MV64x60_WDC_SERVICE_SHIFT);
+}
+
+static void mv64x60_wdt_handler_enable(void)
+{
+ if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_FALSE,
+ MV64x60_WDC_ENABLE_SHIFT)) {
+ mv64x60_wdt_service();
+ printk(KERN_NOTICE "mv64x60_wdt: watchdog activated\n");
+ }
+}
+
+static void mv64x60_wdt_handler_disable(void)
+{
+ if (mv64x60_wdt_toggle_wdc(MV64x60_WDC_ENABLED_TRUE,
+ MV64x60_WDC_ENABLE_SHIFT))
+ printk(KERN_NOTICE "mv64x60_wdt: watchdog deactivated\n");
+}
+
+static void mv64x60_wdt_set_timeout(unsigned int timeout)
+{
+ /* maximum bus cycle count is 0xFFFFFFFF */
+ if (timeout > 0xFFFFFFFF / bus_clk)
+ timeout = 0xFFFFFFFF / bus_clk;
+
+ mv64x60_wdt_count = timeout * bus_clk >> 8;
+ mv64x60_wdt_timeout = timeout;
+}
+
+static int mv64x60_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ mv64x60_wdt_handler_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int mv64x60_wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42)
+ mv64x60_wdt_handler_disable();
+ else {
+ printk(KERN_CRIT
+ "mv64x60_wdt: unexpected close, not stopping timer!\n");
+ mv64x60_wdt_service();
+ }
+ expect_close = 0;
+
+ clear_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags);
+
+ return 0;
+}
+
+static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t * ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+ if(get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ mv64x60_wdt_service();
+ }
+
+ return len;
+}
+
+static int mv64x60_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int timeout;
+ int options;
+ void __user *argp = (void __user *)arg;
+ static struct watchdog_info info = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE |
+ WDIOF_KEEPALIVEPING,
+ .firmware_version = 0,
+ .identity = "MV64x60 watchdog",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &info, sizeof(info)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ if (put_user(wdt_status, (int __user *)argp))
+ return -EFAULT;
+ wdt_status &= ~WDIOF_KEEPALIVEPING;
+ break;
+
+ case WDIOC_GETTEMP:
+ return -EOPNOTSUPP;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, (int __user *)argp))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD)
+ mv64x60_wdt_handler_disable();
+
+ if (options & WDIOS_ENABLECARD)
+ mv64x60_wdt_handler_enable();
+ break;
+
+ case WDIOC_KEEPALIVE:
+ mv64x60_wdt_service();
+ wdt_status |= WDIOF_KEEPALIVEPING;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(timeout, (int __user *)argp))
+ return -EFAULT;
+ mv64x60_wdt_set_timeout(timeout);
+ /* Fall through */
+
+ case WDIOC_GETTIMEOUT:
+ if (put_user(mv64x60_wdt_timeout, (int __user *)argp))
+ return -EFAULT;
+ break;
+
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+static const struct file_operations mv64x60_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = mv64x60_wdt_write,
+ .ioctl = mv64x60_wdt_ioctl,
+ .open = mv64x60_wdt_open,
+ .release = mv64x60_wdt_release,
+};
+
+static struct miscdevice mv64x60_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &mv64x60_wdt_fops,
+};
+
+static int __devinit mv64x60_wdt_probe(struct platform_device *dev)
+{
+ struct mv64x60_wdt_pdata *pdata = dev->dev.platform_data;
+ struct resource *r;
+ int timeout = 10;
+
+ bus_clk = 133; /* in MHz */
+ if (pdata) {
+ timeout = pdata->timeout;
+ bus_clk = pdata->bus_clk;
+ }
+
+ /* Since bus_clk is truncated MHz, actual frequency could be
+ * up to 1MHz higher. Round up, since it's better to time out
+ * too late than too soon.
+ */
+ bus_clk++;
+ bus_clk *= 1000000; /* convert to Hz */
+
+ r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -ENODEV;
+
+ mv64x60_wdt_regs = ioremap(r->start, r->end - r->start + 1);
+ if (mv64x60_wdt_regs == NULL)
+ return -ENOMEM;
+
+ mv64x60_wdt_set_timeout(timeout);
+
+ mv64x60_wdt_handler_disable(); /* in case timer was already running */
+
+ return misc_register(&mv64x60_wdt_miscdev);
+}
+
+static int __devexit mv64x60_wdt_remove(struct platform_device *dev)
+{
+ misc_deregister(&mv64x60_wdt_miscdev);
+
+ mv64x60_wdt_handler_disable();
+
+ iounmap(mv64x60_wdt_regs);
+
+ return 0;
+}
+
+static struct platform_driver mv64x60_wdt_driver = {
+ .probe = mv64x60_wdt_probe,
+ .remove = __devexit_p(mv64x60_wdt_remove),
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = MV64x60_WDT_NAME,
+ },
+};
+
+static int __init mv64x60_wdt_init(void)
+{
+ printk(KERN_INFO "MV64x60 watchdog driver\n");
+
+ return platform_driver_register(&mv64x60_wdt_driver);
+}
+
+static void __exit mv64x60_wdt_exit(void)
+{
+ platform_driver_unregister(&mv64x60_wdt_driver);
+}
+
+module_init(mv64x60_wdt_init);
+module_exit(mv64x60_wdt_exit);
+
+MODULE_AUTHOR("James Chapman <jchapman@katalix.com>");
+MODULE_DESCRIPTION("MV64x60 watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * linux/drivers/char/watchdog/omap_wdt.c
+ *
+ * Watchdog driver for the TI OMAP 16xx & 24xx 32KHz (non-secure) watchdog
+ *
+ * Author: MontaVista Software, Inc.
+ * <gdavis@mvista.com> or <source@mvista.com>
+ *
+ * 2003 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * History:
+ *
+ * 20030527: George G. Davis <gdavis@mvista.com>
+ * Initially based on linux-2.4.19-rmk7-pxa1/drivers/char/sa1100_wdt.c
+ * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
+ * Based on SoftDog driver by Alan Cox <alan@redhat.com>
+ *
+ * Copyright (c) 2004 Texas Instruments.
+ * 1. Modified to support OMAP1610 32-KHz watchdog timer
+ * 2. Ported to 2.6 kernel
+ *
+ * Copyright (c) 2005 David Brownell
+ * Use the driver model and standard identifiers; handle bigger timeouts.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/moduleparam.h>
+#include <linux/clk.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/hardware.h>
+#include <asm/bitops.h>
+
+#include <asm/arch/prcm.h>
+
+#include "omap_wdt.h"
+
+static unsigned timer_margin;
+module_param(timer_margin, uint, 0);
+MODULE_PARM_DESC(timer_margin, "initial watchdog timeout (in seconds)");
+
+static int omap_wdt_users;
+static struct clk *armwdt_ck = NULL;
+static struct clk *mpu_wdt_ick = NULL;
+static struct clk *mpu_wdt_fck = NULL;
+
+static unsigned int wdt_trgr_pattern = 0x1234;
+
+static void omap_wdt_ping(void)
+{
+ /* wait for posted write to complete */
+ while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
+ cpu_relax();
+ wdt_trgr_pattern = ~wdt_trgr_pattern;
+ omap_writel(wdt_trgr_pattern, (OMAP_WATCHDOG_TGR));
+ /* wait for posted write to complete */
+ while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x08)
+ cpu_relax();
+ /* reloaded WCRR from WLDR */
+}
+
+static void omap_wdt_enable(void)
+{
+ /* Sequence to enable the watchdog */
+ omap_writel(0xBBBB, OMAP_WATCHDOG_SPR);
+ while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
+ cpu_relax();
+ omap_writel(0x4444, OMAP_WATCHDOG_SPR);
+ while ((omap_readl(OMAP_WATCHDOG_WPS)) & 0x10)
+ cpu_relax();
+}
+
+static void omap_wdt_disable(void)
+{
+ /* sequence required to disable watchdog */
+ omap_writel(0xAAAA, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
+ cpu_relax();
+ omap_writel(0x5555, OMAP_WATCHDOG_SPR); /* TIMER_MODE */
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x10)
+ cpu_relax();
+}
+
+static void omap_wdt_adjust_timeout(unsigned new_timeout)
+{
+ if (new_timeout < TIMER_MARGIN_MIN)
+ new_timeout = TIMER_MARGIN_DEFAULT;
+ if (new_timeout > TIMER_MARGIN_MAX)
+ new_timeout = TIMER_MARGIN_MAX;
+ timer_margin = new_timeout;
+}
+
+static void omap_wdt_set_timeout(void)
+{
+ u32 pre_margin = GET_WLDR_VAL(timer_margin);
+
+ /* just count up at 32 KHz */
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
+ cpu_relax();
+ omap_writel(pre_margin, OMAP_WATCHDOG_LDR);
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x04)
+ cpu_relax();
+}
+
+/*
+ * Allow only one task to hold it open
+ */
+
+static int omap_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(1, (unsigned long *)&omap_wdt_users))
+ return -EBUSY;
+
+ if (cpu_is_omap16xx())
+ clk_enable(armwdt_ck); /* Enable the clock */
+
+ if (cpu_is_omap24xx()) {
+ clk_enable(mpu_wdt_ick); /* Enable the interface clock */
+ clk_enable(mpu_wdt_fck); /* Enable the functional clock */
+ }
+
+ /* initialize prescaler */
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
+ cpu_relax();
+ omap_writel((1 << 5) | (PTV << 2), OMAP_WATCHDOG_CNTRL);
+ while (omap_readl(OMAP_WATCHDOG_WPS) & 0x01)
+ cpu_relax();
+
+ omap_wdt_set_timeout();
+ omap_wdt_enable();
+ return nonseekable_open(inode, file);
+}
+
+static int omap_wdt_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer unless NOWAYOUT is defined.
+ */
+#ifndef CONFIG_WATCHDOG_NOWAYOUT
+ omap_wdt_disable();
+
+ if (cpu_is_omap16xx()) {
+ clk_disable(armwdt_ck); /* Disable the clock */
+ clk_put(armwdt_ck);
+ armwdt_ck = NULL;
+ }
+
+ if (cpu_is_omap24xx()) {
+ clk_disable(mpu_wdt_ick); /* Disable the clock */
+ clk_disable(mpu_wdt_fck); /* Disable the clock */
+ clk_put(mpu_wdt_ick);
+ clk_put(mpu_wdt_fck);
+ mpu_wdt_ick = NULL;
+ mpu_wdt_fck = NULL;
+ }
+#else
+ printk(KERN_CRIT "omap_wdt: Unexpected close, not stopping!\n");
+#endif
+ omap_wdt_users = 0;
+ return 0;
+}
+
+static ssize_t
+omap_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* Refresh LOAD_TIME. */
+ if (len)
+ omap_wdt_ping();
+ return len;
+}
+
+static int
+omap_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_margin;
+ static struct watchdog_info ident = {
+ .identity = "OMAP Watchdog",
+ .options = WDIOF_SETTIMEOUT,
+ .firmware_version = 0,
+ };
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user((struct watchdog_info __user *)arg, &ident,
+ sizeof(ident));
+ case WDIOC_GETSTATUS:
+ return put_user(0, (int __user *)arg);
+ case WDIOC_GETBOOTSTATUS:
+ if (cpu_is_omap16xx())
+ return put_user(omap_readw(ARM_SYSST),
+ (int __user *)arg);
+ if (cpu_is_omap24xx())
+ return put_user(omap_prcm_get_reset_sources(),
+ (int __user *)arg);
+ case WDIOC_KEEPALIVE:
+ omap_wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int __user *)arg))
+ return -EFAULT;
+ omap_wdt_adjust_timeout(new_margin);
+
+ omap_wdt_disable();
+ omap_wdt_set_timeout();
+ omap_wdt_enable();
+
+ omap_wdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timer_margin, (int __user *)arg);
+ }
+}
+
+static const struct file_operations omap_wdt_fops = {
+ .owner = THIS_MODULE,
+ .write = omap_wdt_write,
+ .ioctl = omap_wdt_ioctl,
+ .open = omap_wdt_open,
+ .release = omap_wdt_release,
+};
+
+static struct miscdevice omap_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &omap_wdt_fops
+};
+
+static int __init omap_wdt_probe(struct platform_device *pdev)
+{
+ struct resource *res, *mem;
+ int ret;
+
+ /* reserve static register mappings */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+
+ mem = request_mem_region(res->start, res->end - res->start + 1,
+ pdev->name);
+ if (mem == NULL)
+ return -EBUSY;
+
+ platform_set_drvdata(pdev, mem);
+
+ omap_wdt_users = 0;
+
+ if (cpu_is_omap16xx()) {
+ armwdt_ck = clk_get(&pdev->dev, "armwdt_ck");
+ if (IS_ERR(armwdt_ck)) {
+ ret = PTR_ERR(armwdt_ck);
+ armwdt_ck = NULL;
+ goto fail;
+ }
+ }
+
+ if (cpu_is_omap24xx()) {
+ mpu_wdt_ick = clk_get(&pdev->dev, "mpu_wdt_ick");
+ if (IS_ERR(mpu_wdt_ick)) {
+ ret = PTR_ERR(mpu_wdt_ick);
+ mpu_wdt_ick = NULL;
+ goto fail;
+ }
+ mpu_wdt_fck = clk_get(&pdev->dev, "mpu_wdt_fck");
+ if (IS_ERR(mpu_wdt_fck)) {
+ ret = PTR_ERR(mpu_wdt_fck);
+ mpu_wdt_fck = NULL;
+ goto fail;
+ }
+ }
+
+ omap_wdt_disable();
+ omap_wdt_adjust_timeout(timer_margin);
+
+ omap_wdt_miscdev.parent = &pdev->dev;
+ ret = misc_register(&omap_wdt_miscdev);
+ if (ret)
+ goto fail;
+
+ pr_info("OMAP Watchdog Timer: initial timeout %d sec\n", timer_margin);
+
+ /* autogate OCP interface clock */
+ omap_writel(0x01, OMAP_WATCHDOG_SYS_CONFIG);
+ return 0;
+
+fail:
+ if (armwdt_ck)
+ clk_put(armwdt_ck);
+ if (mpu_wdt_ick)
+ clk_put(mpu_wdt_ick);
+ if (mpu_wdt_fck)
+ clk_put(mpu_wdt_fck);
+ release_resource(mem);
+ return ret;
+}
+
+static void omap_wdt_shutdown(struct platform_device *pdev)
+{
+ omap_wdt_disable();
+}
+
+static int omap_wdt_remove(struct platform_device *pdev)
+{
+ struct resource *mem = platform_get_drvdata(pdev);
+ misc_deregister(&omap_wdt_miscdev);
+ release_resource(mem);
+ if (armwdt_ck)
+ clk_put(armwdt_ck);
+ if (mpu_wdt_ick)
+ clk_put(mpu_wdt_ick);
+ if (mpu_wdt_fck)
+ clk_put(mpu_wdt_fck);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+/* REVISIT ... not clear this is the best way to handle system suspend; and
+ * it's very inappropriate for selective device suspend (e.g. suspending this
+ * through sysfs rather than by stopping the watchdog daemon). Also, this
+ * may not play well enough with NOWAYOUT...
+ */
+
+static int omap_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ if (omap_wdt_users)
+ omap_wdt_disable();
+ return 0;
+}
+
+static int omap_wdt_resume(struct platform_device *pdev)
+{
+ if (omap_wdt_users) {
+ omap_wdt_enable();
+ omap_wdt_ping();
+ }
+ return 0;
+}
+
+#else
+#define omap_wdt_suspend NULL
+#define omap_wdt_resume NULL
+#endif
+
+static struct platform_driver omap_wdt_driver = {
+ .probe = omap_wdt_probe,
+ .remove = omap_wdt_remove,
+ .shutdown = omap_wdt_shutdown,
+ .suspend = omap_wdt_suspend,
+ .resume = omap_wdt_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "omap_wdt",
+ },
+};
+
+static int __init omap_wdt_init(void)
+{
+ return platform_driver_register(&omap_wdt_driver);
+}
+
+static void __exit omap_wdt_exit(void)
+{
+ platform_driver_unregister(&omap_wdt_driver);
+}
+
+module_init(omap_wdt_init);
+module_exit(omap_wdt_exit);
+
+MODULE_AUTHOR("George G. Davis");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * linux/drivers/char/watchdog/omap_wdt.h
+ *
+ * BRIEF MODULE DESCRIPTION
+ * OMAP Watchdog timer register definitions
+ *
+ * Copyright (C) 2004 Texas Instruments.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _OMAP_WATCHDOG_H
+#define _OMAP_WATCHDOG_H
+
+#define OMAP1610_WATCHDOG_BASE 0xfffeb000
+#define OMAP2420_WATCHDOG_BASE 0x48022000 /*WDT Timer 2 */
+
+#ifdef CONFIG_ARCH_OMAP24XX
+#define OMAP_WATCHDOG_BASE OMAP2420_WATCHDOG_BASE
+#else
+#define OMAP_WATCHDOG_BASE OMAP1610_WATCHDOG_BASE
+#define RM_RSTST_WKUP 0
+#endif
+
+#define OMAP_WATCHDOG_REV (OMAP_WATCHDOG_BASE + 0x00)
+#define OMAP_WATCHDOG_SYS_CONFIG (OMAP_WATCHDOG_BASE + 0x10)
+#define OMAP_WATCHDOG_STATUS (OMAP_WATCHDOG_BASE + 0x14)
+#define OMAP_WATCHDOG_CNTRL (OMAP_WATCHDOG_BASE + 0x24)
+#define OMAP_WATCHDOG_CRR (OMAP_WATCHDOG_BASE + 0x28)
+#define OMAP_WATCHDOG_LDR (OMAP_WATCHDOG_BASE + 0x2c)
+#define OMAP_WATCHDOG_TGR (OMAP_WATCHDOG_BASE + 0x30)
+#define OMAP_WATCHDOG_WPS (OMAP_WATCHDOG_BASE + 0x34)
+#define OMAP_WATCHDOG_SPR (OMAP_WATCHDOG_BASE + 0x48)
+
+/* Using the prescaler, the OMAP watchdog could go for many
+ * months before firing. These limits work without scaling,
+ * with the 60 second default assumed by most tools and docs.
+ */
+#define TIMER_MARGIN_MAX (24 * 60 * 60) /* 1 day */
+#define TIMER_MARGIN_DEFAULT 60 /* 60 secs */
+#define TIMER_MARGIN_MIN 1
+
+#define PTV 0 /* prescale */
+#define GET_WLDR_VAL(secs) (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
+
+#endif /* _OMAP_WATCHDOG_H */
--- /dev/null
+/*
+ * NS pc87413-wdt Watchdog Timer driver for Linux 2.6.x.x
+ *
+ * This code is based on wdt.c with original copyright.
+ *
+ * (C) Copyright 2006 Sven Anders, <anders@anduras.de>
+ * and Marcus Junker, <junker@anduras.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Sven Anders, Marcus Junker nor ANDURAS AG
+ * admit liability nor provide warranty for any of this software.
+ * This material is provided "AS-IS" and at no charge.
+ *
+ * Release 1.1
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/notifier.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* #define DEBUG 1 */
+
+#define DEFAULT_TIMEOUT 1 /* 1 minute */
+#define MAX_TIMEOUT 255
+
+#define VERSION "1.1"
+#define MODNAME "pc87413 WDT"
+#define PFX MODNAME ": "
+#define DPFX MODNAME " - DEBUG: "
+
+#define WDT_INDEX_IO_PORT (io+0) /* I/O port base (index register) */
+#define WDT_DATA_IO_PORT (WDT_INDEX_IO_PORT+1)
+#define SWC_LDN 0x04
+#define SIOCFG2 0x22 /* Serial IO register */
+#define WDCTL 0x10 /* Watchdog-Timer-Controll-Register */
+#define WDTO 0x11 /* Watchdog timeout register */
+#define WDCFG 0x12 /* Watchdog config register */
+
+static int io = 0x2E; /* Address used on Portwell Boards */
+
+static int timeout = DEFAULT_TIMEOUT; /* timeout value */
+static unsigned long timer_enabled = 0; /* is the timer enabled? */
+
+static char expect_close; /* is the close expected? */
+
+static spinlock_t io_lock; /* to guard the watchdog from io races */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+/* -- Low level function ----------------------------------------*/
+
+/* Select pins for Watchdog output */
+
+static inline void pc87413_select_wdt_out (void)
+{
+ unsigned int cr_data = 0;
+
+ /* Step 1: Select multiple pin,pin55,as WDT output */
+
+ outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
+
+ cr_data = inb (WDT_DATA_IO_PORT);
+
+ cr_data |= 0x80; /* Set Bit7 to 1*/
+ outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
+
+ outb_p(cr_data, WDT_DATA_IO_PORT);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Select multiple pin,pin55,as WDT output:"
+ " Bit7 to 1: %d\n", cr_data);
+#endif
+}
+
+/* Enable SWC functions */
+
+static inline void pc87413_enable_swc(void)
+{
+ unsigned int cr_data=0;
+
+ /* Step 2: Enable SWC functions */
+
+ outb_p(0x07, WDT_INDEX_IO_PORT); /* Point SWC_LDN (LDN=4) */
+ outb_p(SWC_LDN, WDT_DATA_IO_PORT);
+
+ outb_p(0x30, WDT_INDEX_IO_PORT); /* Read Index 0x30 First */
+ cr_data = inb(WDT_DATA_IO_PORT);
+ cr_data |= 0x01; /* Set Bit0 to 1 */
+ outb_p(0x30, WDT_INDEX_IO_PORT);
+ outb_p(cr_data, WDT_DATA_IO_PORT); /* Index0x30_bit0P1 */
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Enable SWC functions\n");
+#endif
+}
+
+/* Read SWC I/O base address */
+
+static inline unsigned int pc87413_get_swc_base(void)
+{
+ unsigned int swc_base_addr = 0;
+ unsigned char addr_l, addr_h = 0;
+
+ /* Step 3: Read SWC I/O Base Address */
+
+ outb_p(0x60, WDT_INDEX_IO_PORT); /* Read Index 0x60 */
+ addr_h = inb(WDT_DATA_IO_PORT);
+
+ outb_p(0x61, WDT_INDEX_IO_PORT); /* Read Index 0x61 */
+
+ addr_l = inb(WDT_DATA_IO_PORT);
+
+ swc_base_addr = (addr_h << 8) + addr_l;
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Read SWC I/O Base Address: low %d, high %d,"
+ " res %d\n", addr_l, addr_h, swc_base_addr);
+#endif
+
+ return swc_base_addr;
+}
+
+/* Select Bank 3 of SWC */
+
+static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
+{
+ /* Step 4: Select Bank3 of SWC */
+
+ outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Select Bank3 of SWC\n");
+#endif
+}
+
+/* Set watchdog timeout to x minutes */
+
+static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
+ char pc87413_time)
+{
+ /* Step 5: Programm WDTO, Twd. */
+
+ outb_p(pc87413_time, swc_base_addr + WDTO);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Set WDTO to %d minutes\n", pc87413_time);
+#endif
+}
+
+/* Enable WDEN */
+
+static inline void pc87413_enable_wden(unsigned int swc_base_addr)
+{
+ /* Step 6: Enable WDEN */
+
+ outb_p(inb (swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Enable WDEN\n");
+#endif
+}
+
+/* Enable SW_WD_TREN */
+static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
+{
+ /* Enable SW_WD_TREN */
+
+ outb_p(inb (swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Enable SW_WD_TREN\n");
+#endif
+}
+
+/* Disable SW_WD_TREN */
+
+static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
+{
+ /* Disable SW_WD_TREN */
+
+ outb_p(inb (swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Disable SW_WD_TREN\n");
+#endif
+}
+
+/* Enable SW_WD_TRG */
+
+static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
+{
+ /* Enable SW_WD_TRG */
+
+ outb_p(inb (swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "pc87413 - Enable SW_WD_TRG\n");
+#endif
+}
+
+/* Disable SW_WD_TRG */
+
+static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
+{
+ /* Disable SW_WD_TRG */
+
+ outb_p(inb (swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
+
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "Disable SW_WD_TRG\n");
+#endif
+}
+
+/* -- Higher level functions ------------------------------------*/
+
+/* Enable the watchdog */
+
+static void pc87413_enable(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, timeout);
+ pc87413_enable_wden(swc_base_addr);
+ pc87413_enable_sw_wd_tren(swc_base_addr);
+ pc87413_enable_sw_wd_trg(swc_base_addr);
+
+ spin_unlock(&io_lock);
+}
+
+/* Disable the watchdog */
+
+static void pc87413_disable(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_disable_sw_wd_tren(swc_base_addr);
+ pc87413_disable_sw_wd_trg(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, 0);
+
+ spin_unlock(&io_lock);
+}
+
+/* Refresh the watchdog */
+
+static void pc87413_refresh(void)
+{
+ unsigned int swc_base_addr;
+
+ spin_lock(&io_lock);
+
+ pc87413_select_wdt_out();
+ pc87413_enable_swc();
+ swc_base_addr = pc87413_get_swc_base();
+ pc87413_swc_bank3(swc_base_addr);
+ pc87413_disable_sw_wd_tren(swc_base_addr);
+ pc87413_disable_sw_wd_trg(swc_base_addr);
+ pc87413_programm_wdto(swc_base_addr, timeout);
+ pc87413_enable_wden(swc_base_addr);
+ pc87413_enable_sw_wd_tren(swc_base_addr);
+ pc87413_enable_sw_wd_trg(swc_base_addr);
+
+ spin_unlock(&io_lock);
+}
+
+/* -- File operations -------------------------------------------*/
+
+/**
+ * pc87413_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ */
+
+static int pc87413_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+
+ if (test_and_set_bit(0, &timer_enabled))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Reload and activate timer */
+ pc87413_refresh();
+
+ printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to"
+ " %d minute(s).\n", timeout);
+
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * pc87413_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int pc87413_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer. */
+
+ if (expect_close == 42) {
+ pc87413_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled,"
+ " sleeping again...\n");
+ } else {
+ printk(KERN_CRIT MODNAME "Unexpected close, not stopping"
+ " watchdog!\n");
+ pc87413_refresh();
+ }
+
+ clear_bit(0, &timer_enabled);
+ expect_close = 0;
+
+ return 0;
+}
+
+/**
+ * pc87413_status:
+ *
+ * return, if the watchdog is enabled (timeout is set...)
+ */
+
+
+static int pc87413_status(void)
+{
+ return 0; /* currently not supported */
+}
+
+/**
+ * pc87413_write:
+ * @file: file handle to the watchdog
+ * @data: data buffer to write
+ * @len: length in bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t pc87413_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* reset expect flag */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ pc87413_refresh();
+ }
+ return len;
+}
+
+/**
+ * pc87413_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features. We only actually usefully support
+ * querying capabilities and current status.
+ */
+
+static int pc87413_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "PC87413(HF/F) watchdog"
+ };
+
+ uarg.i = (int __user *)arg;
+
+ switch(cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(pc87413_status(), uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ pc87413_refresh();
+#ifdef DEBUG
+ printk(KERN_INFO DPFX "keepalive\n");
+#endif
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ // the API states this is given in secs
+ new_timeout /= 60;
+
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ pc87413_refresh();
+
+ // fall through and return the new timeout...
+
+ case WDIOC_GETTIMEOUT:
+
+ new_timeout = timeout * 60;
+
+ return put_user(new_timeout, uarg.i);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, uarg.i))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ pc87413_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ pc87413_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+/* -- Notifier funtions -----------------------------------------*/
+
+/**
+ * notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int pc87413_notify_sys(struct notifier_block *this,
+ unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ {
+ /* Turn the card off */
+ pc87413_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/* -- Module's structures ---------------------------------------*/
+
+static const struct file_operations pc87413_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = pc87413_write,
+ .ioctl = pc87413_ioctl,
+ .open = pc87413_open,
+ .release = pc87413_release,
+};
+
+static struct notifier_block pc87413_notifier =
+{
+ .notifier_call = pc87413_notify_sys,
+};
+
+static struct miscdevice pc87413_miscdev=
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &pc87413_fops
+};
+
+/* -- Module init functions -------------------------------------*/
+
+/**
+ * pc87413_init: module's "constructor"
+ *
+ * Set up the WDT watchdog board. All we have to do is grab the
+ * resources we require and bitch if anyone beat us to them.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init pc87413_init(void)
+{
+ int ret;
+
+ spin_lock_init(&io_lock);
+
+ printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n", WDT_INDEX_IO_PORT);
+
+ /* request_region(io, 2, "pc87413"); */
+
+ ret = register_reboot_notifier(&pc87413_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ }
+
+ ret = misc_register(&pc87413_miscdev);
+
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&pc87413_notifier);
+ return ret;
+ }
+
+ printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
+
+ pc87413_enable();
+
+ return 0;
+}
+
+/**
+ * pc87413_exit: module's "destructor"
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static void __exit pc87413_exit(void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ {
+ pc87413_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled.\n");
+ }
+
+ misc_deregister(&pc87413_miscdev);
+ unregister_reboot_notifier(&pc87413_notifier);
+ /* release_region(io,2); */
+
+ printk(MODNAME " watchdog component driver removed.\n");
+}
+
+module_init(pc87413_init);
+module_exit(pc87413_exit);
+
+MODULE_AUTHOR("Sven Anders <anders@anduras.de>, Marcus Junker <junker@anduras.de>,");
+MODULE_DESCRIPTION("PC87413 WDT driver");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, MODNAME " I/O port (default: " __MODULE_STRING(io) ").");
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes (default=" __MODULE_STRING(timeout) ").");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
--- /dev/null
+/*
+ * PC Watchdog Driver
+ * by Ken Hollis (khollis@bitgate.com)
+ *
+ * Permission granted from Simon Machell (smachell@berkprod.com)
+ * Written for the Linux Kernel, and GPLed by Ken Hollis
+ *
+ * 960107 Added request_region routines, modulized the whole thing.
+ * 960108 Fixed end-of-file pointer (Thanks to Dan Hollis), added
+ * WD_TIMEOUT define.
+ * 960216 Added eof marker on the file, and changed verbose messages.
+ * 960716 Made functional and cosmetic changes to the source for
+ * inclusion in Linux 2.0.x kernels, thanks to Alan Cox.
+ * 960717 Removed read/seek routines, replaced with ioctl. Also, added
+ * check_region command due to Alan's suggestion.
+ * 960821 Made changes to compile in newer 2.0.x kernels. Added
+ * "cold reboot sense" entry.
+ * 960825 Made a few changes to code, deleted some defines and made
+ * typedefs to replace them. Made heartbeat reset only available
+ * via ioctl, and removed the write routine.
+ * 960828 Added new items for PC Watchdog Rev.C card.
+ * 960829 Changed around all of the IOCTLs, added new features,
+ * added watchdog disable/re-enable routines. Added firmware
+ * version reporting. Added read routine for temperature.
+ * Removed some extra defines, added an autodetect Revision
+ * routine.
+ * 961006 Revised some documentation, fixed some cosmetic bugs. Made
+ * drivers to panic the system if it's overheating at bootup.
+ * 961118 Changed some verbiage on some of the output, tidied up
+ * code bits, and added compatibility to 2.1.x.
+ * 970912 Enabled board on open and disable on close.
+ * 971107 Took account of recent VFS changes (broke read).
+ * 971210 Disable board on initialisation in case board already ticking.
+ * 971222 Changed open/close for temperature handling
+ * Michael Meskes <meskes@debian.org>.
+ * 980112 Used minor numbers from include/linux/miscdevice.h
+ * 990403 Clear reset status after reading control status register in
+ * pcwd_showprevstate(). [Marc Boucher <marc@mbsi.ca>]
+ * 990605 Made changes to code to support Firmware 1.22a, added
+ * fairly useless proc entry.
+ * 990610 removed said useless proc code for the merge <alan>
+ * 000403 Removed last traces of proc code. <davej>
+ * 011214 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com>
+ * Added timeout module option to override default
+ */
+
+/*
+ * A bells and whistles driver is available from http://www.pcwd.de/
+ * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
+ */
+
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/delay.h> /* For mdelay function */
+#include <linux/timer.h> /* For timer related operations */
+#include <linux/jiffies.h> /* For jiffies stuff */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/reboot.h> /* For kernel_power_off() */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/fs.h> /* For file operations */
+#include <linux/isa.h> /* For isa devices */
+#include <linux/ioport.h> /* For io-port access */
+#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
+
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+#include <asm/io.h> /* For inb/outb/... */
+
+/* Module and version information */
+#define WATCHDOG_VERSION "1.20"
+#define WATCHDOG_DATE "18 Feb 2007"
+#define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
+#define WATCHDOG_NAME "pcwd"
+#define PFX WATCHDOG_NAME ": "
+#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
+#define WD_VER WATCHDOG_VERSION " (" WATCHDOG_DATE ")"
+
+/*
+ * It should be noted that PCWD_REVISION_B was removed because A and B
+ * are essentially the same types of card, with the exception that B
+ * has temperature reporting. Since I didn't receive a Rev.B card,
+ * the Rev.B card is not supported. (It's a good thing too, as they
+ * are no longer in production.)
+ */
+#define PCWD_REVISION_A 1
+#define PCWD_REVISION_C 2
+
+/*
+ * These are the auto-probe addresses available.
+ *
+ * Revision A only uses ports 0x270 and 0x370. Revision C introduced 0x350.
+ * Revision A has an address range of 2 addresses, while Revision C has 4.
+ */
+#define PCWD_ISA_NR_CARDS 3
+static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
+
+/*
+ * These are the defines that describe the control status bits for the
+ * PCI-PC Watchdog card.
+*/
+/* Port 1 : Control Status #1 for the PC Watchdog card, revision A. */
+#define WD_WDRST 0x01 /* Previously reset state */
+#define WD_T110 0x02 /* Temperature overheat sense */
+#define WD_HRTBT 0x04 /* Heartbeat sense */
+#define WD_RLY2 0x08 /* External relay triggered */
+#define WD_SRLY2 0x80 /* Software external relay triggered */
+/* Port 1 : Control Status #1 for the PC Watchdog card, revision C. */
+#define WD_REVC_WTRP 0x01 /* Watchdog Trip status */
+#define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */
+#define WD_REVC_TTRP 0x04 /* Temperature Trip status */
+#define WD_REVC_RL2A 0x08 /* Relay 2 activated by on-board processor */
+#define WD_REVC_RL1A 0x10 /* Relay 1 active */
+#define WD_REVC_R2DS 0x40 /* Relay 2 disable */
+#define WD_REVC_RLY2 0x80 /* Relay 2 activated? */
+/* Port 2 : Control Status #2 */
+#define WD_WDIS 0x10 /* Watchdog Disabled */
+#define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */
+#define WD_SSEL 0x40 /* Watchdog Switch Select (1:SW1 <-> 0:SW2) */
+#define WD_WCMD 0x80 /* Watchdog Command Mode */
+
+/* max. time we give an ISA watchdog card to process a command */
+/* 500ms for each 4 bit response (according to spec.) */
+#define ISA_COMMAND_TIMEOUT 1000
+
+/* Watchdog's internal commands */
+#define CMD_ISA_IDLE 0x00
+#define CMD_ISA_VERSION_INTEGER 0x01
+#define CMD_ISA_VERSION_TENTH 0x02
+#define CMD_ISA_VERSION_HUNDRETH 0x03
+#define CMD_ISA_VERSION_MINOR 0x04
+#define CMD_ISA_SWITCH_SETTINGS 0x05
+#define CMD_ISA_RESET_PC 0x06
+#define CMD_ISA_ARM_0 0x07
+#define CMD_ISA_ARM_30 0x08
+#define CMD_ISA_ARM_60 0x09
+#define CMD_ISA_DELAY_TIME_2SECS 0x0A
+#define CMD_ISA_DELAY_TIME_4SECS 0x0B
+#define CMD_ISA_DELAY_TIME_8SECS 0x0C
+#define CMD_ISA_RESET_RELAYS 0x0D
+
+/* Watchdog's Dip Switch heartbeat values */
+static const int heartbeat_tbl [] = {
+ 20, /* OFF-OFF-OFF = 20 Sec */
+ 40, /* OFF-OFF-ON = 40 Sec */
+ 60, /* OFF-ON-OFF = 1 Min */
+ 300, /* OFF-ON-ON = 5 Min */
+ 600, /* ON-OFF-OFF = 10 Min */
+ 1800, /* ON-OFF-ON = 30 Min */
+ 3600, /* ON-ON-OFF = 1 Hour */
+ 7200, /* ON-ON-ON = 2 hour */
+};
+
+/*
+ * We are using an kernel timer to do the pinging of the watchdog
+ * every ~500ms. We try to set the internal heartbeat of the
+ * watchdog to 2 ms.
+ */
+
+#define WDT_INTERVAL (HZ/2+1)
+
+/* We can only use 1 card due to the /dev/watchdog restriction */
+static int cards_found;
+
+/* internal variables */
+static atomic_t open_allowed = ATOMIC_INIT(1);
+static char expect_close;
+static int temp_panic;
+static struct { /* this is private data for each ISA-PC watchdog card */
+ char fw_ver_str[6]; /* The cards firmware version */
+ int revision; /* The card's revision */
+ int supports_temp; /* Wether or not the card has a temperature device */
+ int command_mode; /* Wether or not the card is in command mode */
+ int boot_status; /* The card's boot status */
+ int io_addr; /* The cards I/O address */
+ spinlock_t io_lock; /* the lock for io operations */
+ struct timer_list timer; /* The timer that pings the watchdog */
+ unsigned long next_heartbeat; /* the next_heartbeat for the timer */
+} pcwd_private;
+
+/* module parameters */
+#define QUIET 0 /* Default */
+#define VERBOSE 1 /* Verbose */
+#define DEBUG 2 /* print fancy stuff too */
+static int debug = QUIET;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
+
+#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
+static int heartbeat = WATCHDOG_HEARTBEAT;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Internal functions
+ */
+
+static int send_isa_command(int cmd)
+{
+ int i;
+ int control_status;
+ int port0, last_port0; /* Double read for stabilising */
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "sending following data cmd=0x%02x\n",
+ cmd);
+
+ /* The WCMD bit must be 1 and the command is only 4 bits in size */
+ control_status = (cmd & 0x0F) | WD_WCMD;
+ outb_p(control_status, pcwd_private.io_addr + 2);
+ udelay(ISA_COMMAND_TIMEOUT);
+
+ port0 = inb_p(pcwd_private.io_addr);
+ for (i = 0; i < 25; ++i) {
+ last_port0 = port0;
+ port0 = inb_p(pcwd_private.io_addr);
+
+ if (port0 == last_port0)
+ break; /* Data is stable */
+
+ udelay (250);
+ }
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: port0=0x%02x last_port0=0x%02x\n",
+ cmd, port0, last_port0);
+
+ return port0;
+}
+
+static int set_command_mode(void)
+{
+ int i, found=0, count=0;
+
+ /* Set the card into command mode */
+ spin_lock(&pcwd_private.io_lock);
+ while ((!found) && (count < 3)) {
+ i = send_isa_command(CMD_ISA_IDLE);
+
+ if (i == 0x00)
+ found = 1;
+ else if (i == 0xF3) {
+ /* Card does not like what we've done to it */
+ outb_p(0x00, pcwd_private.io_addr + 2);
+ udelay(1200); /* Spec says wait 1ms */
+ outb_p(0x00, pcwd_private.io_addr + 2);
+ udelay(ISA_COMMAND_TIMEOUT);
+ }
+ count++;
+ }
+ spin_unlock(&pcwd_private.io_lock);
+ pcwd_private.command_mode = found;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "command_mode=%d\n",
+ pcwd_private.command_mode);
+
+ return(found);
+}
+
+static void unset_command_mode(void)
+{
+ /* Set the card into normal mode */
+ spin_lock(&pcwd_private.io_lock);
+ outb_p(0x00, pcwd_private.io_addr + 2);
+ udelay(ISA_COMMAND_TIMEOUT);
+ spin_unlock(&pcwd_private.io_lock);
+
+ pcwd_private.command_mode = 0;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "command_mode=%d\n",
+ pcwd_private.command_mode);
+}
+
+static inline void pcwd_check_temperature_support(void)
+{
+ if (inb(pcwd_private.io_addr) != 0xF0)
+ pcwd_private.supports_temp = 1;
+}
+
+static inline void pcwd_get_firmware(void)
+{
+ int one, ten, hund, minor;
+
+ strcpy(pcwd_private.fw_ver_str, "ERROR");
+
+ if (set_command_mode()) {
+ one = send_isa_command(CMD_ISA_VERSION_INTEGER);
+ ten = send_isa_command(CMD_ISA_VERSION_TENTH);
+ hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH);
+ minor = send_isa_command(CMD_ISA_VERSION_MINOR);
+ sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", one, ten, hund, minor);
+ }
+ unset_command_mode();
+
+ return;
+}
+
+static inline int pcwd_get_option_switches(void)
+{
+ int option_switches=0;
+
+ if (set_command_mode()) {
+ /* Get switch settings */
+ option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS);
+ }
+
+ unset_command_mode();
+ return(option_switches);
+}
+
+static void pcwd_show_card_info(void)
+{
+ int option_switches;
+
+ /* Get some extra info from the hardware (in command/debug/diag mode) */
+ if (pcwd_private.revision == PCWD_REVISION_A)
+ printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", pcwd_private.io_addr);
+ else if (pcwd_private.revision == PCWD_REVISION_C) {
+ pcwd_get_firmware();
+ printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",
+ pcwd_private.io_addr, pcwd_private.fw_ver_str);
+ option_switches = pcwd_get_option_switches();
+ printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
+ option_switches,
+ ((option_switches & 0x10) ? "ON" : "OFF"),
+ ((option_switches & 0x08) ? "ON" : "OFF"));
+
+ /* Reprogram internal heartbeat to 2 seconds */
+ if (set_command_mode()) {
+ send_isa_command(CMD_ISA_DELAY_TIME_2SECS);
+ unset_command_mode();
+ }
+ }
+
+ if (pcwd_private.supports_temp)
+ printk(KERN_INFO PFX "Temperature Option Detected\n");
+
+ if (pcwd_private.boot_status & WDIOF_CARDRESET)
+ printk(KERN_INFO PFX "Previous reboot was caused by the card\n");
+
+ if (pcwd_private.boot_status & WDIOF_OVERHEAT) {
+ printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n");
+ printk(KERN_EMERG PFX "CPU Overheat\n");
+ }
+
+ if (pcwd_private.boot_status == 0)
+ printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
+}
+
+static void pcwd_timer_ping(unsigned long data)
+{
+ int wdrst_stat;
+
+ /* If we got a heartbeat pulse within the WDT_INTERVAL
+ * we agree to ping the WDT */
+ if(time_before(jiffies, pcwd_private.next_heartbeat)) {
+ /* Ping the watchdog */
+ spin_lock(&pcwd_private.io_lock);
+ if (pcwd_private.revision == PCWD_REVISION_A) {
+ /* Rev A cards are reset by setting the WD_WDRST bit in register 1 */
+ wdrst_stat = inb_p(pcwd_private.io_addr);
+ wdrst_stat &= 0x0F;
+ wdrst_stat |= WD_WDRST;
+
+ outb_p(wdrst_stat, pcwd_private.io_addr + 1);
+ } else {
+ /* Re-trigger watchdog by writing to port 0 */
+ outb_p(0x00, pcwd_private.io_addr);
+ }
+
+ /* Re-set the timer interval */
+ mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL);
+
+ spin_unlock(&pcwd_private.io_lock);
+ } else {
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ }
+}
+
+static int pcwd_start(void)
+{
+ int stat_reg;
+
+ pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
+
+ /* Start the timer */
+ mod_timer(&pcwd_private.timer, jiffies + WDT_INTERVAL);
+
+ /* Enable the port */
+ if (pcwd_private.revision == PCWD_REVISION_C) {
+ spin_lock(&pcwd_private.io_lock);
+ outb_p(0x00, pcwd_private.io_addr + 3);
+ udelay(ISA_COMMAND_TIMEOUT);
+ stat_reg = inb_p(pcwd_private.io_addr + 2);
+ spin_unlock(&pcwd_private.io_lock);
+ if (stat_reg & WD_WDIS) {
+ printk(KERN_INFO PFX "Could not start watchdog\n");
+ return -EIO;
+ }
+ }
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog started\n");
+
+ return 0;
+}
+
+static int pcwd_stop(void)
+{
+ int stat_reg;
+
+ /* Stop the timer */
+ del_timer(&pcwd_private.timer);
+
+ /* Disable the board */
+ if (pcwd_private.revision == PCWD_REVISION_C) {
+ spin_lock(&pcwd_private.io_lock);
+ outb_p(0xA5, pcwd_private.io_addr + 3);
+ udelay(ISA_COMMAND_TIMEOUT);
+ outb_p(0xA5, pcwd_private.io_addr + 3);
+ udelay(ISA_COMMAND_TIMEOUT);
+ stat_reg = inb_p(pcwd_private.io_addr + 2);
+ spin_unlock(&pcwd_private.io_lock);
+ if ((stat_reg & WD_WDIS) == 0) {
+ printk(KERN_INFO PFX "Could not stop watchdog\n");
+ return -EIO;
+ }
+ }
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog stopped\n");
+
+ return 0;
+}
+
+static int pcwd_keepalive(void)
+{
+ /* user land ping */
+ pcwd_private.next_heartbeat = jiffies + (heartbeat * HZ);
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
+
+ return 0;
+}
+
+static int pcwd_set_heartbeat(int t)
+{
+ if ((t < 2) || (t > 7200)) /* arbitrary upper limit */
+ return -EINVAL;
+
+ heartbeat = t;
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "New heartbeat: %d\n",
+ heartbeat);
+
+ return 0;
+}
+
+static int pcwd_get_status(int *status)
+{
+ int control_status;
+
+ *status=0;
+ spin_lock(&pcwd_private.io_lock);
+ if (pcwd_private.revision == PCWD_REVISION_A)
+ /* Rev A cards return status information from
+ * the base register, which is used for the
+ * temperature in other cards. */
+ control_status = inb(pcwd_private.io_addr);
+ else {
+ /* Rev C cards return card status in the base
+ * address + 1 register. And use different bits
+ * to indicate a card initiated reset, and an
+ * over-temperature condition. And the reboot
+ * status can be reset. */
+ control_status = inb(pcwd_private.io_addr + 1);
+ }
+ spin_unlock(&pcwd_private.io_lock);
+
+ if (pcwd_private.revision == PCWD_REVISION_A) {
+ if (control_status & WD_WDRST)
+ *status |= WDIOF_CARDRESET;
+
+ if (control_status & WD_T110) {
+ *status |= WDIOF_OVERHEAT;
+ if (temp_panic) {
+ printk(KERN_INFO PFX "Temperature overheat trip!\n");
+ kernel_power_off();
+ /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
+ }
+ }
+ } else {
+ if (control_status & WD_REVC_WTRP)
+ *status |= WDIOF_CARDRESET;
+
+ if (control_status & WD_REVC_TTRP) {
+ *status |= WDIOF_OVERHEAT;
+ if (temp_panic) {
+ printk(KERN_INFO PFX "Temperature overheat trip!\n");
+ kernel_power_off();
+ /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int pcwd_clear_status(void)
+{
+ int control_status;
+
+ if (pcwd_private.revision == PCWD_REVISION_C) {
+ spin_lock(&pcwd_private.io_lock);
+
+ if (debug >= VERBOSE)
+ printk(KERN_INFO PFX "clearing watchdog trip status\n");
+
+ control_status = inb_p(pcwd_private.io_addr + 1);
+
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
+ printk(KERN_DEBUG PFX "sending: 0x%02x\n",
+ (control_status & WD_REVC_R2DS));
+ }
+
+ /* clear reset status & Keep Relay 2 disable state as it is */
+ outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1);
+
+ spin_unlock(&pcwd_private.io_lock);
+ }
+ return 0;
+}
+
+static int pcwd_get_temperature(int *temperature)
+{
+ /* check that port 0 gives temperature info and no command results */
+ if (pcwd_private.command_mode)
+ return -1;
+
+ *temperature = 0;
+ if (!pcwd_private.supports_temp)
+ return -ENODEV;
+
+ /*
+ * Convert celsius to fahrenheit, since this was
+ * the decided 'standard' for this return value.
+ */
+ spin_lock(&pcwd_private.io_lock);
+ *temperature = ((inb(pcwd_private.io_addr)) * 9 / 5) + 32;
+ spin_unlock(&pcwd_private.io_lock);
+
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "temperature is: %d F\n",
+ *temperature);
+ }
+
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int pcwd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int rv;
+ int status;
+ int temperature;
+ int new_heartbeat;
+ int __user *argp = (int __user *)arg;
+ static struct watchdog_info ident = {
+ .options = WDIOF_OVERHEAT |
+ WDIOF_CARDRESET |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "PCWD",
+ };
+
+ switch(cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ if(copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+
+ case WDIOC_GETSTATUS:
+ pcwd_get_status(&status);
+ return put_user(status, argp);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(pcwd_private.boot_status, argp);
+
+ case WDIOC_GETTEMP:
+ if (pcwd_get_temperature(&temperature))
+ return -EFAULT;
+
+ return put_user(temperature, argp);
+
+ case WDIOC_SETOPTIONS:
+ if (pcwd_private.revision == PCWD_REVISION_C)
+ {
+ if(copy_from_user(&rv, argp, sizeof(int)))
+ return -EFAULT;
+
+ if (rv & WDIOS_DISABLECARD)
+ {
+ return pcwd_stop();
+ }
+
+ if (rv & WDIOS_ENABLECARD)
+ {
+ return pcwd_start();
+ }
+
+ if (rv & WDIOS_TEMPPANIC)
+ {
+ temp_panic = 1;
+ }
+ }
+ return -EINVAL;
+
+ case WDIOC_KEEPALIVE:
+ pcwd_keepalive();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, argp))
+ return -EFAULT;
+
+ if (pcwd_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ pcwd_keepalive();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, argp);
+ }
+
+ return 0;
+}
+
+static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len,
+ loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ pcwd_keepalive();
+ }
+ return len;
+}
+
+static int pcwd_open(struct inode *inode, struct file *file)
+{
+ if (!atomic_dec_and_test(&open_allowed) ) {
+ if (debug >= VERBOSE)
+ printk(KERN_ERR PFX "Attempt to open already opened device.\n");
+ atomic_inc( &open_allowed );
+ return -EBUSY;
+ }
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate */
+ pcwd_start();
+ pcwd_keepalive();
+ return nonseekable_open(inode, file);
+}
+
+static int pcwd_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ pcwd_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ pcwd_keepalive();
+ }
+ expect_close = 0;
+ atomic_inc( &open_allowed );
+ return 0;
+}
+
+/*
+ * /dev/temperature handling
+ */
+
+static ssize_t pcwd_temp_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ int temperature;
+
+ if (pcwd_get_temperature(&temperature))
+ return -EFAULT;
+
+ if (copy_to_user(buf, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+static int pcwd_temp_open(struct inode *inode, struct file *file)
+{
+ if (!pcwd_private.supports_temp)
+ return -ENODEV;
+
+ return nonseekable_open(inode, file);
+}
+
+static int pcwd_temp_close(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations pcwd_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = pcwd_write,
+ .ioctl = pcwd_ioctl,
+ .open = pcwd_open,
+ .release = pcwd_close,
+};
+
+static struct miscdevice pcwd_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &pcwd_fops,
+};
+
+static const struct file_operations pcwd_temp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = pcwd_temp_read,
+ .open = pcwd_temp_open,
+ .release = pcwd_temp_close,
+};
+
+static struct miscdevice temp_miscdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &pcwd_temp_fops,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static inline int get_revision(void)
+{
+ int r = PCWD_REVISION_C;
+
+ spin_lock(&pcwd_private.io_lock);
+ /* REV A cards use only 2 io ports; test
+ * presumes a floating bus reads as 0xff. */
+ if ((inb(pcwd_private.io_addr + 2) == 0xFF) ||
+ (inb(pcwd_private.io_addr + 3) == 0xFF))
+ r=PCWD_REVISION_A;
+ spin_unlock(&pcwd_private.io_lock);
+
+ return r;
+}
+
+/*
+ * The ISA cards have a heartbeat bit in one of the registers, which
+ * register is card dependent. The heartbeat bit is monitored, and if
+ * found, is considered proof that a Berkshire card has been found.
+ * The initial rate is once per second at board start up, then twice
+ * per second for normal operation.
+ */
+static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
+{
+ int base_addr=pcwd_ioports[id];
+ int port0, last_port0; /* Reg 0, in case it's REV A */
+ int port1, last_port1; /* Register 1 for REV C cards */
+ int i;
+ int retval;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n",
+ id);
+
+ if (!request_region (base_addr, 4, "PCWD")) {
+ printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr);
+ return 0;
+ }
+
+ retval = 0;
+
+ port0 = inb_p(base_addr); /* For REV A boards */
+ port1 = inb_p(base_addr + 1); /* For REV C boards */
+ if (port0 != 0xff || port1 != 0xff) {
+ /* Not an 'ff' from a floating bus, so must be a card! */
+ for (i = 0; i < 4; ++i) {
+
+ msleep(500);
+
+ last_port0 = port0;
+ last_port1 = port1;
+
+ port0 = inb_p(base_addr);
+ port1 = inb_p(base_addr + 1);
+
+ /* Has either hearbeat bit changed? */
+ if ((port0 ^ last_port0) & WD_HRTBT ||
+ (port1 ^ last_port1) & WD_REVC_HRBT) {
+ retval = 1;
+ break;
+ }
+ }
+ }
+ release_region (base_addr, 4);
+
+ return retval;
+}
+
+static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
+{
+ int ret;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "pcwd_isa_probe id=%d\n",
+ id);
+
+ cards_found++;
+ if (cards_found == 1)
+ printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", WD_VER);
+
+ if (cards_found > 1) {
+ printk(KERN_ERR PFX "This driver only supports 1 device\n");
+ return -ENODEV;
+ }
+
+ if (pcwd_ioports[id] == 0x0000) {
+ printk(KERN_ERR PFX "No I/O-Address for card detected\n");
+ return -ENODEV;
+ }
+ pcwd_private.io_addr = pcwd_ioports[id];
+
+ spin_lock_init(&pcwd_private.io_lock);
+
+ /* Check card's revision */
+ pcwd_private.revision = get_revision();
+
+ if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ pcwd_private.io_addr);
+ ret=-EIO;
+ goto error_request_region;
+ }
+
+ /* Initial variables */
+ pcwd_private.supports_temp = 0;
+ temp_panic = 0;
+ pcwd_private.boot_status = 0x0000;
+
+ /* get the boot_status */
+ pcwd_get_status(&pcwd_private.boot_status);
+
+ /* clear the "card caused reboot" flag */
+ pcwd_clear_status();
+
+ setup_timer(&pcwd_private.timer, pcwd_timer_ping, 0);
+
+ /* Disable the board */
+ pcwd_stop();
+
+ /* Check whether or not the card supports the temperature device */
+ pcwd_check_temperature_support();
+
+ /* Show info about the card itself */
+ pcwd_show_card_info();
+
+ /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+ if (heartbeat == 0)
+ heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)];
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (pcwd_set_heartbeat(heartbeat)) {
+ pcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n",
+ WATCHDOG_HEARTBEAT);
+ }
+
+ if (pcwd_private.supports_temp) {
+ ret = misc_register(&temp_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
+ goto error_misc_register_temp;
+ }
+ }
+
+ ret = misc_register(&pcwd_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto error_misc_register_watchdog;
+ }
+
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+
+ return 0;
+
+error_misc_register_watchdog:
+ if (pcwd_private.supports_temp)
+ misc_deregister(&temp_miscdev);
+error_misc_register_temp:
+ release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
+error_request_region:
+ pcwd_private.io_addr = 0x0000;
+ cards_found--;
+ return ret;
+}
+
+static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id)
+{
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "pcwd_isa_remove id=%d\n",
+ id);
+
+ if (!pcwd_private.io_addr)
+ return 1;
+
+ /* Disable the board */
+ if (!nowayout)
+ pcwd_stop();
+
+ /* Deregister */
+ misc_deregister(&pcwd_miscdev);
+ if (pcwd_private.supports_temp)
+ misc_deregister(&temp_miscdev);
+ release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
+ pcwd_private.io_addr = 0x0000;
+ cards_found--;
+
+ return 0;
+}
+
+static void pcwd_isa_shutdown(struct device *dev, unsigned int id)
+{
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "pcwd_isa_shutdown id=%d\n",
+ id);
+
+ pcwd_stop();
+}
+
+static struct isa_driver pcwd_isa_driver = {
+ .match = pcwd_isa_match,
+ .probe = pcwd_isa_probe,
+ .remove = __devexit_p(pcwd_isa_remove),
+ .shutdown = pcwd_isa_shutdown,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = WATCHDOG_NAME,
+ },
+};
+
+static int __init pcwd_init_module(void)
+{
+ return isa_register_driver(&pcwd_isa_driver, PCWD_ISA_NR_CARDS);
+}
+
+static void __exit pcwd_cleanup_module(void)
+{
+ isa_unregister_driver(&pcwd_isa_driver);
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(pcwd_init_module);
+module_exit(pcwd_cleanup_module);
+
+MODULE_AUTHOR("Ken Hollis <kenji@bitgate.com>, Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("Berkshire ISA-PC Watchdog driver");
+MODULE_VERSION(WATCHDOG_VERSION);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
--- /dev/null
+/*
+ * Berkshire PCI-PC Watchdog Card Driver
+ *
+ * (c) Copyright 2003-2007 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ * Based on source code of the following authors:
+ * Ken Hollis <kenji@bitgate.com>,
+ * Lindsay Harris <lindsay@bluegum.com>,
+ * Alan Cox <alan@redhat.com>,
+ * Matt Domsch <Matt_Domsch@dell.com>,
+ * Rob Radez <rob@osinvestor.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ */
+
+/*
+ * A bells and whistles driver is available from:
+ * http://www.kernel.org/pub/linux/kernel/people/wim/pcwd/pcwd_pci/
+ *
+ * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
+ */
+
+/*
+ * Includes, defines, variables, module parameters, ...
+ */
+
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/delay.h> /* For mdelay function */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/notifier.h> /* For notifier support */
+#include <linux/reboot.h> /* For reboot_notifier stuff */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/fs.h> /* For file operations */
+#include <linux/pci.h> /* For pci functions */
+#include <linux/ioport.h> /* For io-port access */
+#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
+
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+#include <asm/io.h> /* For inb/outb/... */
+
+/* Module and version information */
+#define WATCHDOG_VERSION "1.03"
+#define WATCHDOG_DATE "21 Jan 2007"
+#define WATCHDOG_DRIVER_NAME "PCI-PC Watchdog"
+#define WATCHDOG_NAME "pcwd_pci"
+#define PFX WATCHDOG_NAME ": "
+#define DRIVER_VERSION WATCHDOG_DRIVER_NAME " driver, v" WATCHDOG_VERSION " (" WATCHDOG_DATE ")\n"
+
+/* Stuff for the PCI ID's */
+#ifndef PCI_VENDOR_ID_QUICKLOGIC
+#define PCI_VENDOR_ID_QUICKLOGIC 0x11e3
+#endif
+
+#ifndef PCI_DEVICE_ID_WATCHDOG_PCIPCWD
+#define PCI_DEVICE_ID_WATCHDOG_PCIPCWD 0x5030
+#endif
+
+/*
+ * These are the defines that describe the control status bits for the
+ * PCI-PC Watchdog card.
+ */
+/* Port 1 : Control Status #1 */
+#define WD_PCI_WTRP 0x01 /* Watchdog Trip status */
+#define WD_PCI_HRBT 0x02 /* Watchdog Heartbeat */
+#define WD_PCI_TTRP 0x04 /* Temperature Trip status */
+#define WD_PCI_RL2A 0x08 /* Relay 2 Active */
+#define WD_PCI_RL1A 0x10 /* Relay 1 Active */
+#define WD_PCI_R2DS 0x40 /* Relay 2 Disable Temperature-trip/reset */
+#define WD_PCI_RLY2 0x80 /* Activate Relay 2 on the board */
+/* Port 2 : Control Status #2 */
+#define WD_PCI_WDIS 0x10 /* Watchdog Disable */
+#define WD_PCI_ENTP 0x20 /* Enable Temperature Trip Reset */
+#define WD_PCI_WRSP 0x40 /* Watchdog wrote response */
+#define WD_PCI_PCMD 0x80 /* PC has sent command */
+
+/* according to documentation max. time to process a command for the pci
+ * watchdog card is 100 ms, so we give it 150 ms to do it's job */
+#define PCI_COMMAND_TIMEOUT 150
+
+/* Watchdog's internal commands */
+#define CMD_GET_STATUS 0x04
+#define CMD_GET_FIRMWARE_VERSION 0x08
+#define CMD_READ_WATCHDOG_TIMEOUT 0x18
+#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19
+#define CMD_GET_CLEAR_RESET_COUNT 0x84
+
+/* Watchdog's Dip Switch heartbeat values */
+static const int heartbeat_tbl [] = {
+ 5, /* OFF-OFF-OFF = 5 Sec */
+ 10, /* OFF-OFF-ON = 10 Sec */
+ 30, /* OFF-ON-OFF = 30 Sec */
+ 60, /* OFF-ON-ON = 1 Min */
+ 300, /* ON-OFF-OFF = 5 Min */
+ 600, /* ON-OFF-ON = 10 Min */
+ 1800, /* ON-ON-OFF = 30 Min */
+ 3600, /* ON-ON-ON = 1 hour */
+};
+
+/* We can only use 1 card due to the /dev/watchdog restriction */
+static int cards_found;
+
+/* internal variables */
+static int temp_panic;
+static unsigned long is_active;
+static char expect_release;
+static struct { /* this is private data for each PCI-PC watchdog card */
+ int supports_temp; /* Wether or not the card has a temperature device */
+ int boot_status; /* The card's boot status */
+ unsigned long io_addr; /* The cards I/O address */
+ spinlock_t io_lock; /* the lock for io operations */
+ struct pci_dev *pdev; /* the PCI-device */
+} pcipcwd_private;
+
+/* module parameters */
+#define QUIET 0 /* Default */
+#define VERBOSE 1 /* Verbose */
+#define DEBUG 2 /* print fancy stuff too */
+static int debug = QUIET;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
+
+#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
+static int heartbeat = WATCHDOG_HEARTBEAT;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Internal functions
+ */
+
+static int send_command(int cmd, int *msb, int *lsb)
+{
+ int got_response, count;
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x\n",
+ cmd, *msb, *lsb);
+
+ spin_lock(&pcipcwd_private.io_lock);
+ /* If a command requires data it should be written first.
+ * Data for commands with 8 bits of data should be written to port 4.
+ * Commands with 16 bits of data, should be written as LSB to port 4
+ * and MSB to port 5.
+ * After the required data has been written then write the command to
+ * port 6. */
+ outb_p(*lsb, pcipcwd_private.io_addr + 4);
+ outb_p(*msb, pcipcwd_private.io_addr + 5);
+ outb_p(cmd, pcipcwd_private.io_addr + 6);
+
+ /* wait till the pci card processed the command, signaled by
+ * the WRSP bit in port 2 and give it a max. timeout of
+ * PCI_COMMAND_TIMEOUT to process */
+ got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
+ for (count = 0; (count < PCI_COMMAND_TIMEOUT) && (!got_response); count++) {
+ mdelay(1);
+ got_response = inb_p(pcipcwd_private.io_addr + 2) & WD_PCI_WRSP;
+ }
+
+ if (debug >= DEBUG) {
+ if (got_response) {
+ printk(KERN_DEBUG PFX "time to process command was: %d ms\n",
+ count);
+ } else {
+ printk(KERN_DEBUG PFX "card did not respond on command!\n");
+ }
+ }
+
+ if (got_response) {
+ /* read back response */
+ *lsb = inb_p(pcipcwd_private.io_addr + 4);
+ *msb = inb_p(pcipcwd_private.io_addr + 5);
+
+ /* clear WRSP bit */
+ inb_p(pcipcwd_private.io_addr + 6);
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "received following data for cmd=0x%02x: msb=0x%02x lsb=0x%02x\n",
+ cmd, *msb, *lsb);
+ }
+
+ spin_unlock(&pcipcwd_private.io_lock);
+
+ return got_response;
+}
+
+static inline void pcipcwd_check_temperature_support(void)
+{
+ if (inb_p(pcipcwd_private.io_addr) != 0xF0)
+ pcipcwd_private.supports_temp = 1;
+}
+
+static int pcipcwd_get_option_switches(void)
+{
+ int option_switches;
+
+ option_switches = inb_p(pcipcwd_private.io_addr + 3);
+ return option_switches;
+}
+
+static void pcipcwd_show_card_info(void)
+{
+ int got_fw_rev, fw_rev_major, fw_rev_minor;
+ char fw_ver_str[20]; /* The cards firmware version */
+ int option_switches;
+
+ got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
+ if (got_fw_rev) {
+ sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
+ } else {
+ sprintf(fw_ver_str, "<card no answer>");
+ }
+
+ /* Get switch settings */
+ option_switches = pcipcwd_get_option_switches();
+
+ printk(KERN_INFO PFX "Found card at port 0x%04x (Firmware: %s) %s temp option\n",
+ (int) pcipcwd_private.io_addr, fw_ver_str,
+ (pcipcwd_private.supports_temp ? "with" : "without"));
+
+ printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
+ option_switches,
+ ((option_switches & 0x10) ? "ON" : "OFF"),
+ ((option_switches & 0x08) ? "ON" : "OFF"));
+
+ if (pcipcwd_private.boot_status & WDIOF_CARDRESET)
+ printk(KERN_INFO PFX "Previous reset was caused by the Watchdog card\n");
+
+ if (pcipcwd_private.boot_status & WDIOF_OVERHEAT)
+ printk(KERN_INFO PFX "Card sensed a CPU Overheat\n");
+
+ if (pcipcwd_private.boot_status == 0)
+ printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
+}
+
+static int pcipcwd_start(void)
+{
+ int stat_reg;
+
+ spin_lock(&pcipcwd_private.io_lock);
+ outb_p(0x00, pcipcwd_private.io_addr + 3);
+ udelay(1000);
+
+ stat_reg = inb_p(pcipcwd_private.io_addr + 2);
+ spin_unlock(&pcipcwd_private.io_lock);
+
+ if (stat_reg & WD_PCI_WDIS) {
+ printk(KERN_ERR PFX "Card timer not enabled\n");
+ return -1;
+ }
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog started\n");
+
+ return 0;
+}
+
+static int pcipcwd_stop(void)
+{
+ int stat_reg;
+
+ spin_lock(&pcipcwd_private.io_lock);
+ outb_p(0xA5, pcipcwd_private.io_addr + 3);
+ udelay(1000);
+
+ outb_p(0xA5, pcipcwd_private.io_addr + 3);
+ udelay(1000);
+
+ stat_reg = inb_p(pcipcwd_private.io_addr + 2);
+ spin_unlock(&pcipcwd_private.io_lock);
+
+ if (!(stat_reg & WD_PCI_WDIS)) {
+ printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
+ return -1;
+ }
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Watchdog stopped\n");
+
+ return 0;
+}
+
+static int pcipcwd_keepalive(void)
+{
+ /* Re-trigger watchdog by writing to port 0 */
+ spin_lock(&pcipcwd_private.io_lock);
+ outb_p(0x42, pcipcwd_private.io_addr); /* send out any data */
+ spin_unlock(&pcipcwd_private.io_lock);
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "Watchdog keepalive signal send\n");
+
+ return 0;
+}
+
+static int pcipcwd_set_heartbeat(int t)
+{
+ int t_msb = t / 256;
+ int t_lsb = t % 256;
+
+ if ((t < 0x0001) || (t > 0xFFFF))
+ return -EINVAL;
+
+ /* Write new heartbeat to watchdog */
+ send_command(CMD_WRITE_WATCHDOG_TIMEOUT, &t_msb, &t_lsb);
+
+ heartbeat = t;
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "New heartbeat: %d\n",
+ heartbeat);
+
+ return 0;
+}
+
+static int pcipcwd_get_status(int *status)
+{
+ int control_status;
+
+ *status=0;
+ control_status = inb_p(pcipcwd_private.io_addr + 1);
+ if (control_status & WD_PCI_WTRP)
+ *status |= WDIOF_CARDRESET;
+ if (control_status & WD_PCI_TTRP) {
+ *status |= WDIOF_OVERHEAT;
+ if (temp_panic)
+ panic(PFX "Temperature overheat trip!\n");
+ }
+
+ if (debug >= DEBUG)
+ printk(KERN_DEBUG PFX "Control Status #1: 0x%02x\n",
+ control_status);
+
+ return 0;
+}
+
+static int pcipcwd_clear_status(void)
+{
+ int control_status;
+ int msb;
+ int reset_counter;
+
+ if (debug >= VERBOSE)
+ printk(KERN_INFO PFX "clearing watchdog trip status & LED\n");
+
+ control_status = inb_p(pcipcwd_private.io_addr + 1);
+
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
+ printk(KERN_DEBUG PFX "sending: 0x%02x\n",
+ (control_status & WD_PCI_R2DS) | WD_PCI_WTRP);
+ }
+
+ /* clear trip status & LED and keep mode of relay 2 */
+ outb_p((control_status & WD_PCI_R2DS) | WD_PCI_WTRP, pcipcwd_private.io_addr + 1);
+
+ /* clear reset counter */
+ msb=0;
+ reset_counter=0xff;
+ send_command(CMD_GET_CLEAR_RESET_COUNT, &msb, &reset_counter);
+
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "reset count was: 0x%02x\n",
+ reset_counter);
+ }
+
+ return 0;
+}
+
+static int pcipcwd_get_temperature(int *temperature)
+{
+ *temperature = 0;
+ if (!pcipcwd_private.supports_temp)
+ return -ENODEV;
+
+ spin_lock(&pcipcwd_private.io_lock);
+ *temperature = inb_p(pcipcwd_private.io_addr);
+ spin_unlock(&pcipcwd_private.io_lock);
+
+ /*
+ * Convert celsius to fahrenheit, since this was
+ * the decided 'standard' for this return value.
+ */
+ *temperature = (*temperature * 9 / 5) + 32;
+
+ if (debug >= DEBUG) {
+ printk(KERN_DEBUG PFX "temperature is: %d F\n",
+ *temperature);
+ }
+
+ return 0;
+}
+
+static int pcipcwd_get_timeleft(int *time_left)
+{
+ int msb;
+ int lsb;
+
+ /* Read the time that's left before rebooting */
+ /* Note: if the board is not yet armed then we will read 0xFFFF */
+ send_command(CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
+
+ *time_left = (msb << 8) + lsb;
+
+ if (debug >= VERBOSE)
+ printk(KERN_DEBUG PFX "Time left before next reboot: %d\n",
+ *time_left);
+
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t pcipcwd_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ expect_release = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if(get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_release = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ pcipcwd_keepalive();
+ }
+ return len;
+}
+
+static int pcipcwd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_OVERHEAT |
+ WDIOF_CARDRESET |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = WATCHDOG_DRIVER_NAME,
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof (ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ {
+ int status;
+
+ pcipcwd_get_status(&status);
+
+ return put_user(status, p);
+ }
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(pcipcwd_private.boot_status, p);
+
+ case WDIOC_GETTEMP:
+ {
+ int temperature;
+
+ if (pcipcwd_get_temperature(&temperature))
+ return -EFAULT;
+
+ return put_user(temperature, p);
+ }
+
+ case WDIOC_KEEPALIVE:
+ pcipcwd_keepalive();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if (get_user (new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ if (pcipcwd_stop())
+ return -EIO;
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ if (pcipcwd_start())
+ return -EIO;
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_TEMPPANIC) {
+ temp_panic = 1;
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_heartbeat;
+
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (pcipcwd_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ pcipcwd_keepalive();
+ /* Fall */
+ }
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+
+ case WDIOC_GETTIMELEFT:
+ {
+ int time_left;
+
+ if (pcipcwd_get_timeleft(&time_left))
+ return -EFAULT;
+
+ return put_user(time_left, p);
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+static int pcipcwd_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &is_active)) {
+ if (debug >= VERBOSE)
+ printk(KERN_ERR PFX "Attempt to open already opened device.\n");
+ return -EBUSY;
+ }
+
+ /* Activate */
+ pcipcwd_start();
+ pcipcwd_keepalive();
+ return nonseekable_open(inode, file);
+}
+
+static int pcipcwd_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ */
+ if (expect_release == 42) {
+ pcipcwd_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ pcipcwd_keepalive();
+ }
+ expect_release = 0;
+ clear_bit(0, &is_active);
+ return 0;
+}
+
+/*
+ * /dev/temperature handling
+ */
+
+static ssize_t pcipcwd_temp_read(struct file *file, char __user *data,
+ size_t len, loff_t *ppos)
+{
+ int temperature;
+
+ if (pcipcwd_get_temperature(&temperature))
+ return -EFAULT;
+
+ if (copy_to_user (data, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+static int pcipcwd_temp_open(struct inode *inode, struct file *file)
+{
+ if (!pcipcwd_private.supports_temp)
+ return -ENODEV;
+
+ return nonseekable_open(inode, file);
+}
+
+static int pcipcwd_temp_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/*
+ * Notify system
+ */
+
+static int pcipcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the WDT off */
+ pcipcwd_stop();
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations pcipcwd_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = pcipcwd_write,
+ .ioctl = pcipcwd_ioctl,
+ .open = pcipcwd_open,
+ .release = pcipcwd_release,
+};
+
+static struct miscdevice pcipcwd_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &pcipcwd_fops,
+};
+
+static const struct file_operations pcipcwd_temp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = pcipcwd_temp_read,
+ .open = pcipcwd_temp_open,
+ .release = pcipcwd_temp_release,
+};
+
+static struct miscdevice pcipcwd_temp_miscdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &pcipcwd_temp_fops,
+};
+
+static struct notifier_block pcipcwd_notifier = {
+ .notifier_call = pcipcwd_notify_sys,
+};
+
+/*
+ * Init & exit routines
+ */
+
+static int __devinit pcipcwd_card_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ int ret = -EIO;
+
+ cards_found++;
+ if (cards_found == 1)
+ printk(KERN_INFO PFX DRIVER_VERSION);
+
+ if (cards_found > 1) {
+ printk(KERN_ERR PFX "This driver only supports 1 device\n");
+ return -ENODEV;
+ }
+
+ if (pci_enable_device(pdev)) {
+ printk(KERN_ERR PFX "Not possible to enable PCI Device\n");
+ return -ENODEV;
+ }
+
+ if (pci_resource_start(pdev, 0) == 0x0000) {
+ printk(KERN_ERR PFX "No I/O-Address for card detected\n");
+ ret = -ENODEV;
+ goto err_out_disable_device;
+ }
+
+ pcipcwd_private.pdev = pdev;
+ pcipcwd_private.io_addr = pci_resource_start(pdev, 0);
+
+ if (pci_request_regions(pdev, WATCHDOG_NAME)) {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ (int) pcipcwd_private.io_addr);
+ ret = -EIO;
+ goto err_out_disable_device;
+ }
+
+ /* get the boot_status */
+ pcipcwd_get_status(&pcipcwd_private.boot_status);
+
+ /* clear the "card caused reboot" flag */
+ pcipcwd_clear_status();
+
+ /* disable card */
+ pcipcwd_stop();
+
+ /* Check whether or not the card supports the temperature device */
+ pcipcwd_check_temperature_support();
+
+ /* Show info about the card itself */
+ pcipcwd_show_card_info();
+
+ /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+ if (heartbeat == 0)
+ heartbeat = heartbeat_tbl[(pcipcwd_get_option_switches() & 0x07)];
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (pcipcwd_set_heartbeat(heartbeat)) {
+ pcipcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
+ WATCHDOG_HEARTBEAT);
+ }
+
+ ret = register_reboot_notifier(&pcipcwd_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto err_out_release_region;
+ }
+
+ if (pcipcwd_private.supports_temp) {
+ ret = misc_register(&pcipcwd_temp_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
+ goto err_out_unregister_reboot;
+ }
+ }
+
+ ret = misc_register(&pcipcwd_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_out_misc_deregister;
+ }
+
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+
+ return 0;
+
+err_out_misc_deregister:
+ if (pcipcwd_private.supports_temp)
+ misc_deregister(&pcipcwd_temp_miscdev);
+err_out_unregister_reboot:
+ unregister_reboot_notifier(&pcipcwd_notifier);
+err_out_release_region:
+ pci_release_regions(pdev);
+err_out_disable_device:
+ pci_disable_device(pdev);
+ return ret;
+}
+
+static void __devexit pcipcwd_card_exit(struct pci_dev *pdev)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ pcipcwd_stop();
+
+ /* Deregister */
+ misc_deregister(&pcipcwd_miscdev);
+ if (pcipcwd_private.supports_temp)
+ misc_deregister(&pcipcwd_temp_miscdev);
+ unregister_reboot_notifier(&pcipcwd_notifier);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ cards_found--;
+}
+
+static struct pci_device_id pcipcwd_pci_tbl[] = {
+ { PCI_VENDOR_ID_QUICKLOGIC, PCI_DEVICE_ID_WATCHDOG_PCIPCWD,
+ PCI_ANY_ID, PCI_ANY_ID, },
+ { 0 }, /* End of list */
+};
+MODULE_DEVICE_TABLE(pci, pcipcwd_pci_tbl);
+
+static struct pci_driver pcipcwd_driver = {
+ .name = WATCHDOG_NAME,
+ .id_table = pcipcwd_pci_tbl,
+ .probe = pcipcwd_card_init,
+ .remove = __devexit_p(pcipcwd_card_exit),
+};
+
+static int __init pcipcwd_init_module(void)
+{
+ spin_lock_init(&pcipcwd_private.io_lock);
+
+ return pci_register_driver(&pcipcwd_driver);
+}
+
+static void __exit pcipcwd_cleanup_module(void)
+{
+ pci_unregister_driver(&pcipcwd_driver);
+
+ printk(KERN_INFO PFX "Watchdog Module Unloaded.\n");
+}
+
+module_init(pcipcwd_init_module);
+module_exit(pcipcwd_cleanup_module);
+
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("Berkshire PCI-PC Watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
--- /dev/null
+/*
+ * Berkshire USB-PC Watchdog Card Driver
+ *
+ * (c) Copyright 2004-2007 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ * Based on source code of the following authors:
+ * Ken Hollis <kenji@bitgate.com>,
+ * Alan Cox <alan@redhat.com>,
+ * Matt Domsch <Matt_Domsch@dell.com>,
+ * Rob Radez <rob@osinvestor.com>,
+ * Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Wim Van Sebroeck nor Iguana vzw. admit liability nor
+ * provide warranty for any of this software. This material is
+ * provided "AS-IS" and at no charge.
+ *
+ * Thanks also to Simon Machell at Berkshire Products Inc. for
+ * providing the test hardware. More info is available at
+ * http://www.berkprod.com/ or http://www.pcwatchdog.com/
+ */
+
+#include <linux/module.h> /* For module specific items */
+#include <linux/moduleparam.h> /* For new moduleparam's */
+#include <linux/types.h> /* For standard types (like size_t) */
+#include <linux/errno.h> /* For the -ENODEV/... values */
+#include <linux/kernel.h> /* For printk/panic/... */
+#include <linux/delay.h> /* For mdelay function */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/watchdog.h> /* For the watchdog specific items */
+#include <linux/notifier.h> /* For notifier support */
+#include <linux/reboot.h> /* For reboot_notifier stuff */
+#include <linux/init.h> /* For __init/__exit/... */
+#include <linux/fs.h> /* For file operations */
+#include <linux/usb.h> /* For USB functions */
+#include <linux/slab.h> /* For kmalloc, ... */
+#include <linux/mutex.h> /* For mutex locking */
+#include <linux/hid.h> /* For HID_REQ_SET_REPORT & HID_DT_REPORT */
+
+#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
+
+
+#ifdef CONFIG_USB_DEBUG
+ static int debug = 1;
+#else
+ static int debug;
+#endif
+
+/* Use our own dbg macro */
+#undef dbg
+#define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG PFX format "\n" , ## arg); } while (0)
+
+
+/* Module and Version Information */
+#define DRIVER_VERSION "1.02"
+#define DRIVER_DATE "21 Jan 2007"
+#define DRIVER_AUTHOR "Wim Van Sebroeck <wim@iguana.be>"
+#define DRIVER_DESC "Berkshire USB-PC Watchdog driver"
+#define DRIVER_LICENSE "GPL"
+#define DRIVER_NAME "pcwd_usb"
+#define PFX DRIVER_NAME ": "
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
+
+/* Module Parameters */
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
+#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
+static int heartbeat = WATCHDOG_HEARTBEAT;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/* The vendor and product id's for the USB-PC Watchdog card */
+#define USB_PCWD_VENDOR_ID 0x0c98
+#define USB_PCWD_PRODUCT_ID 0x1140
+
+/* table of devices that work with this driver */
+static struct usb_device_id usb_pcwd_table [] = {
+ { USB_DEVICE(USB_PCWD_VENDOR_ID, USB_PCWD_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE (usb, usb_pcwd_table);
+
+/* according to documentation max. time to process a command for the USB
+ * watchdog card is 100 or 200 ms, so we give it 250 ms to do it's job */
+#define USB_COMMAND_TIMEOUT 250
+
+/* Watchdog's internal commands */
+#define CMD_READ_TEMP 0x02 /* Read Temperature; Re-trigger Watchdog */
+#define CMD_TRIGGER CMD_READ_TEMP
+#define CMD_GET_STATUS 0x04 /* Get Status Information */
+#define CMD_GET_FIRMWARE_VERSION 0x08 /* Get Firmware Version */
+#define CMD_GET_DIP_SWITCH_SETTINGS 0x0c /* Get Dip Switch Settings */
+#define CMD_READ_WATCHDOG_TIMEOUT 0x18 /* Read Current Watchdog Time */
+#define CMD_WRITE_WATCHDOG_TIMEOUT 0x19 /* Write Current Watchdog Time */
+#define CMD_ENABLE_WATCHDOG 0x30 /* Enable / Disable Watchdog */
+#define CMD_DISABLE_WATCHDOG CMD_ENABLE_WATCHDOG
+
+/* Watchdog's Dip Switch heartbeat values */
+static const int heartbeat_tbl [] = {
+ 5, /* OFF-OFF-OFF = 5 Sec */
+ 10, /* OFF-OFF-ON = 10 Sec */
+ 30, /* OFF-ON-OFF = 30 Sec */
+ 60, /* OFF-ON-ON = 1 Min */
+ 300, /* ON-OFF-OFF = 5 Min */
+ 600, /* ON-OFF-ON = 10 Min */
+ 1800, /* ON-ON-OFF = 30 Min */
+ 3600, /* ON-ON-ON = 1 hour */
+};
+
+/* We can only use 1 card due to the /dev/watchdog restriction */
+static int cards_found;
+
+/* some internal variables */
+static unsigned long is_active;
+static char expect_release;
+
+/* Structure to hold all of our device specific stuff */
+struct usb_pcwd_private {
+ struct usb_device * udev; /* save off the usb device pointer */
+ struct usb_interface * interface; /* the interface for this device */
+
+ unsigned int interface_number; /* the interface number used for cmd's */
+
+ unsigned char * intr_buffer; /* the buffer to intr data */
+ dma_addr_t intr_dma; /* the dma address for the intr buffer */
+ size_t intr_size; /* the size of the intr buffer */
+ struct urb * intr_urb; /* the urb used for the intr pipe */
+
+ unsigned char cmd_command; /* The command that is reported back */
+ unsigned char cmd_data_msb; /* The data MSB that is reported back */
+ unsigned char cmd_data_lsb; /* The data LSB that is reported back */
+ atomic_t cmd_received; /* true if we received a report after a command */
+
+ int exists; /* Wether or not the device exists */
+ struct mutex mtx; /* locks this structure */
+};
+static struct usb_pcwd_private *usb_pcwd_device;
+
+/* prevent races between open() and disconnect() */
+static DEFINE_MUTEX(disconnect_mutex);
+
+/* local function prototypes */
+static int usb_pcwd_probe (struct usb_interface *interface, const struct usb_device_id *id);
+static void usb_pcwd_disconnect (struct usb_interface *interface);
+
+/* usb specific object needed to register this driver with the usb subsystem */
+static struct usb_driver usb_pcwd_driver = {
+ .name = DRIVER_NAME,
+ .probe = usb_pcwd_probe,
+ .disconnect = usb_pcwd_disconnect,
+ .id_table = usb_pcwd_table,
+};
+
+
+static void usb_pcwd_intr_done(struct urb *urb)
+{
+ struct usb_pcwd_private *usb_pcwd = (struct usb_pcwd_private *)urb->context;
+ unsigned char *data = usb_pcwd->intr_buffer;
+ int retval;
+
+ switch (urb->status) {
+ case 0: /* success */
+ break;
+ case -ECONNRESET: /* unlink */
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+ return;
+ /* -EPIPE: should clear the halt */
+ default: /* error */
+ dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+ goto resubmit;
+ }
+
+ dbg("received following data cmd=0x%02x msb=0x%02x lsb=0x%02x",
+ data[0], data[1], data[2]);
+
+ usb_pcwd->cmd_command = data[0];
+ usb_pcwd->cmd_data_msb = data[1];
+ usb_pcwd->cmd_data_lsb = data[2];
+
+ /* notify anyone waiting that the cmd has finished */
+ atomic_set (&usb_pcwd->cmd_received, 1);
+
+resubmit:
+ retval = usb_submit_urb (urb, GFP_ATOMIC);
+ if (retval)
+ printk(KERN_ERR PFX "can't resubmit intr, usb_submit_urb failed with result %d\n",
+ retval);
+}
+
+static int usb_pcwd_send_command(struct usb_pcwd_private *usb_pcwd, unsigned char cmd,
+ unsigned char *msb, unsigned char *lsb)
+{
+ int got_response, count;
+ unsigned char buf[6];
+
+ /* We will not send any commands if the USB PCWD device does not exist */
+ if ((!usb_pcwd) || (!usb_pcwd->exists))
+ return -1;
+
+ /* The USB PC Watchdog uses a 6 byte report format. The board currently uses
+ * only 3 of the six bytes of the report. */
+ buf[0] = cmd; /* Byte 0 = CMD */
+ buf[1] = *msb; /* Byte 1 = Data MSB */
+ buf[2] = *lsb; /* Byte 2 = Data LSB */
+ buf[3] = buf[4] = buf[5] = 0; /* All other bytes not used */
+
+ dbg("sending following data cmd=0x%02x msb=0x%02x lsb=0x%02x",
+ buf[0], buf[1], buf[2]);
+
+ atomic_set (&usb_pcwd->cmd_received, 0);
+
+ if (usb_control_msg(usb_pcwd->udev, usb_sndctrlpipe(usb_pcwd->udev, 0),
+ HID_REQ_SET_REPORT, HID_DT_REPORT,
+ 0x0200, usb_pcwd->interface_number, buf, sizeof(buf),
+ USB_COMMAND_TIMEOUT) != sizeof(buf)) {
+ dbg("usb_pcwd_send_command: error in usb_control_msg for cmd 0x%x 0x%x 0x%x\n", cmd, *msb, *lsb);
+ }
+ /* wait till the usb card processed the command,
+ * with a max. timeout of USB_COMMAND_TIMEOUT */
+ got_response = 0;
+ for (count = 0; (count < USB_COMMAND_TIMEOUT) && (!got_response); count++) {
+ mdelay(1);
+ if (atomic_read (&usb_pcwd->cmd_received))
+ got_response = 1;
+ }
+
+ if ((got_response) && (cmd == usb_pcwd->cmd_command)) {
+ /* read back response */
+ *msb = usb_pcwd->cmd_data_msb;
+ *lsb = usb_pcwd->cmd_data_lsb;
+ }
+
+ return got_response;
+}
+
+static int usb_pcwd_start(struct usb_pcwd_private *usb_pcwd)
+{
+ unsigned char msb = 0x00;
+ unsigned char lsb = 0x00;
+ int retval;
+
+ /* Enable Watchdog */
+ retval = usb_pcwd_send_command(usb_pcwd, CMD_ENABLE_WATCHDOG, &msb, &lsb);
+
+ if ((retval == 0) || (lsb == 0)) {
+ printk(KERN_ERR PFX "Card did not acknowledge enable attempt\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int usb_pcwd_stop(struct usb_pcwd_private *usb_pcwd)
+{
+ unsigned char msb = 0xA5;
+ unsigned char lsb = 0xC3;
+ int retval;
+
+ /* Disable Watchdog */
+ retval = usb_pcwd_send_command(usb_pcwd, CMD_DISABLE_WATCHDOG, &msb, &lsb);
+
+ if ((retval == 0) || (lsb != 0)) {
+ printk(KERN_ERR PFX "Card did not acknowledge disable attempt\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int usb_pcwd_keepalive(struct usb_pcwd_private *usb_pcwd)
+{
+ unsigned char dummy;
+
+ /* Re-trigger Watchdog */
+ usb_pcwd_send_command(usb_pcwd, CMD_TRIGGER, &dummy, &dummy);
+
+ return 0;
+}
+
+static int usb_pcwd_set_heartbeat(struct usb_pcwd_private *usb_pcwd, int t)
+{
+ unsigned char msb = t / 256;
+ unsigned char lsb = t % 256;
+
+ if ((t < 0x0001) || (t > 0xFFFF))
+ return -EINVAL;
+
+ /* Write new heartbeat to watchdog */
+ usb_pcwd_send_command(usb_pcwd, CMD_WRITE_WATCHDOG_TIMEOUT, &msb, &lsb);
+
+ heartbeat = t;
+ return 0;
+}
+
+static int usb_pcwd_get_temperature(struct usb_pcwd_private *usb_pcwd, int *temperature)
+{
+ unsigned char msb, lsb;
+
+ usb_pcwd_send_command(usb_pcwd, CMD_READ_TEMP, &msb, &lsb);
+
+ /*
+ * Convert celsius to fahrenheit, since this was
+ * the decided 'standard' for this return value.
+ */
+ *temperature = (lsb * 9 / 5) + 32;
+
+ return 0;
+}
+
+static int usb_pcwd_get_timeleft(struct usb_pcwd_private *usb_pcwd, int *time_left)
+{
+ unsigned char msb, lsb;
+
+ /* Read the time that's left before rebooting */
+ /* Note: if the board is not yet armed then we will read 0xFFFF */
+ usb_pcwd_send_command(usb_pcwd, CMD_READ_WATCHDOG_TIMEOUT, &msb, &lsb);
+
+ *time_left = (msb << 8) + lsb;
+
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t usb_pcwd_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ expect_release = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if(get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_release = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ usb_pcwd_keepalive(usb_pcwd_device);
+ }
+ return len;
+}
+
+static int usb_pcwd_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = DRIVER_NAME,
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof (ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_GETTEMP:
+ {
+ int temperature;
+
+ if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature))
+ return -EFAULT;
+
+ return put_user(temperature, p);
+ }
+
+ case WDIOC_KEEPALIVE:
+ usb_pcwd_keepalive(usb_pcwd_device);
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if (get_user (new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ usb_pcwd_stop(usb_pcwd_device);
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ usb_pcwd_start(usb_pcwd_device);
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_heartbeat;
+
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (usb_pcwd_set_heartbeat(usb_pcwd_device, new_heartbeat))
+ return -EINVAL;
+
+ usb_pcwd_keepalive(usb_pcwd_device);
+ /* Fall */
+ }
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+
+ case WDIOC_GETTIMELEFT:
+ {
+ int time_left;
+
+ if (usb_pcwd_get_timeleft(usb_pcwd_device, &time_left))
+ return -EFAULT;
+
+ return put_user(time_left, p);
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+static int usb_pcwd_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &is_active))
+ return -EBUSY;
+
+ /* Activate */
+ usb_pcwd_start(usb_pcwd_device);
+ usb_pcwd_keepalive(usb_pcwd_device);
+ return nonseekable_open(inode, file);
+}
+
+static int usb_pcwd_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ */
+ if (expect_release == 42) {
+ usb_pcwd_stop(usb_pcwd_device);
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ usb_pcwd_keepalive(usb_pcwd_device);
+ }
+ expect_release = 0;
+ clear_bit(0, &is_active);
+ return 0;
+}
+
+/*
+ * /dev/temperature handling
+ */
+
+static ssize_t usb_pcwd_temperature_read(struct file *file, char __user *data,
+ size_t len, loff_t *ppos)
+{
+ int temperature;
+
+ if (usb_pcwd_get_temperature(usb_pcwd_device, &temperature))
+ return -EFAULT;
+
+ if (copy_to_user(data, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+static int usb_pcwd_temperature_open(struct inode *inode, struct file *file)
+{
+ return nonseekable_open(inode, file);
+}
+
+static int usb_pcwd_temperature_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/*
+ * Notify system
+ */
+
+static int usb_pcwd_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the WDT off */
+ usb_pcwd_stop(usb_pcwd_device);
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations usb_pcwd_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = usb_pcwd_write,
+ .ioctl = usb_pcwd_ioctl,
+ .open = usb_pcwd_open,
+ .release = usb_pcwd_release,
+};
+
+static struct miscdevice usb_pcwd_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &usb_pcwd_fops,
+};
+
+static const struct file_operations usb_pcwd_temperature_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = usb_pcwd_temperature_read,
+ .open = usb_pcwd_temperature_open,
+ .release = usb_pcwd_temperature_release,
+};
+
+static struct miscdevice usb_pcwd_temperature_miscdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &usb_pcwd_temperature_fops,
+};
+
+static struct notifier_block usb_pcwd_notifier = {
+ .notifier_call = usb_pcwd_notify_sys,
+};
+
+/**
+ * usb_pcwd_delete
+ */
+static inline void usb_pcwd_delete (struct usb_pcwd_private *usb_pcwd)
+{
+ usb_free_urb(usb_pcwd->intr_urb);
+ if (usb_pcwd->intr_buffer != NULL)
+ usb_buffer_free(usb_pcwd->udev, usb_pcwd->intr_size,
+ usb_pcwd->intr_buffer, usb_pcwd->intr_dma);
+ kfree (usb_pcwd);
+}
+
+/**
+ * usb_pcwd_probe
+ *
+ * Called by the usb core when a new device is connected that it thinks
+ * this driver might be interested in.
+ */
+static int usb_pcwd_probe(struct usb_interface *interface, const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(interface);
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ struct usb_pcwd_private *usb_pcwd = NULL;
+ int pipe, maxp;
+ int retval = -ENOMEM;
+ int got_fw_rev;
+ unsigned char fw_rev_major, fw_rev_minor;
+ char fw_ver_str[20];
+ unsigned char option_switches, dummy;
+
+ cards_found++;
+ if (cards_found > 1) {
+ printk(KERN_ERR PFX "This driver only supports 1 device\n");
+ return -ENODEV;
+ }
+
+ /* get the active interface descriptor */
+ iface_desc = interface->cur_altsetting;
+
+ /* check out that we have a HID device */
+ if (!(iface_desc->desc.bInterfaceClass == USB_CLASS_HID)) {
+ printk(KERN_ERR PFX "The device isn't a Human Interface Device\n");
+ return -ENODEV;
+ }
+
+ /* check out the endpoint: it has to be Interrupt & IN */
+ endpoint = &iface_desc->endpoint[0].desc;
+
+ if (!((endpoint->bEndpointAddress & USB_DIR_IN) &&
+ ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+ == USB_ENDPOINT_XFER_INT))) {
+ /* we didn't find a Interrupt endpoint with direction IN */
+ printk(KERN_ERR PFX "Couldn't find an INTR & IN endpoint\n");
+ return -ENODEV;
+ }
+
+ /* get a handle to the interrupt data pipe */
+ pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
+ maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+
+ /* allocate memory for our device and initialize it */
+ usb_pcwd = kzalloc (sizeof(struct usb_pcwd_private), GFP_KERNEL);
+ if (usb_pcwd == NULL) {
+ printk(KERN_ERR PFX "Out of memory\n");
+ goto error;
+ }
+
+ usb_pcwd_device = usb_pcwd;
+
+ mutex_init(&usb_pcwd->mtx);
+ usb_pcwd->udev = udev;
+ usb_pcwd->interface = interface;
+ usb_pcwd->interface_number = iface_desc->desc.bInterfaceNumber;
+ usb_pcwd->intr_size = (le16_to_cpu(endpoint->wMaxPacketSize) > 8 ? le16_to_cpu(endpoint->wMaxPacketSize) : 8);
+
+ /* set up the memory buffer's */
+ if (!(usb_pcwd->intr_buffer = usb_buffer_alloc(udev, usb_pcwd->intr_size, GFP_ATOMIC, &usb_pcwd->intr_dma))) {
+ printk(KERN_ERR PFX "Out of memory\n");
+ goto error;
+ }
+
+ /* allocate the urb's */
+ usb_pcwd->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!usb_pcwd->intr_urb) {
+ printk(KERN_ERR PFX "Out of memory\n");
+ goto error;
+ }
+
+ /* initialise the intr urb's */
+ usb_fill_int_urb(usb_pcwd->intr_urb, udev, pipe,
+ usb_pcwd->intr_buffer, usb_pcwd->intr_size,
+ usb_pcwd_intr_done, usb_pcwd, endpoint->bInterval);
+ usb_pcwd->intr_urb->transfer_dma = usb_pcwd->intr_dma;
+ usb_pcwd->intr_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ /* register our interrupt URB with the USB system */
+ if (usb_submit_urb(usb_pcwd->intr_urb, GFP_KERNEL)) {
+ printk(KERN_ERR PFX "Problem registering interrupt URB\n");
+ retval = -EIO; /* failure */
+ goto error;
+ }
+
+ /* The device exists and can be communicated with */
+ usb_pcwd->exists = 1;
+
+ /* disable card */
+ usb_pcwd_stop(usb_pcwd);
+
+ /* Get the Firmware Version */
+ got_fw_rev = usb_pcwd_send_command(usb_pcwd, CMD_GET_FIRMWARE_VERSION, &fw_rev_major, &fw_rev_minor);
+ if (got_fw_rev) {
+ sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
+ } else {
+ sprintf(fw_ver_str, "<card no answer>");
+ }
+
+ printk(KERN_INFO PFX "Found card (Firmware: %s) with temp option\n",
+ fw_ver_str);
+
+ /* Get switch settings */
+ usb_pcwd_send_command(usb_pcwd, CMD_GET_DIP_SWITCH_SETTINGS, &dummy, &option_switches);
+
+ printk(KERN_INFO PFX "Option switches (0x%02x): Temperature Reset Enable=%s, Power On Delay=%s\n",
+ option_switches,
+ ((option_switches & 0x10) ? "ON" : "OFF"),
+ ((option_switches & 0x08) ? "ON" : "OFF"));
+
+ /* If heartbeat = 0 then we use the heartbeat from the dip-switches */
+ if (heartbeat == 0)
+ heartbeat = heartbeat_tbl[(option_switches & 0x07)];
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (usb_pcwd_set_heartbeat(usb_pcwd, heartbeat)) {
+ usb_pcwd_set_heartbeat(usb_pcwd, WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
+ WATCHDOG_HEARTBEAT);
+ }
+
+ retval = register_reboot_notifier(&usb_pcwd_notifier);
+ if (retval != 0) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ retval);
+ goto error;
+ }
+
+ retval = misc_register(&usb_pcwd_temperature_miscdev);
+ if (retval != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, retval);
+ goto err_out_unregister_reboot;
+ }
+
+ retval = misc_register(&usb_pcwd_miscdev);
+ if (retval != 0) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, retval);
+ goto err_out_misc_deregister;
+ }
+
+ /* we can register the device now, as it is ready */
+ usb_set_intfdata (interface, usb_pcwd);
+
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+
+ return 0;
+
+err_out_misc_deregister:
+ misc_deregister(&usb_pcwd_temperature_miscdev);
+err_out_unregister_reboot:
+ unregister_reboot_notifier(&usb_pcwd_notifier);
+error:
+ if (usb_pcwd)
+ usb_pcwd_delete(usb_pcwd);
+ usb_pcwd_device = NULL;
+ return retval;
+}
+
+
+/**
+ * usb_pcwd_disconnect
+ *
+ * Called by the usb core when the device is removed from the system.
+ *
+ * This routine guarantees that the driver will not submit any more urbs
+ * by clearing dev->udev.
+ */
+static void usb_pcwd_disconnect(struct usb_interface *interface)
+{
+ struct usb_pcwd_private *usb_pcwd;
+
+ /* prevent races with open() */
+ mutex_lock(&disconnect_mutex);
+
+ usb_pcwd = usb_get_intfdata (interface);
+ usb_set_intfdata (interface, NULL);
+
+ mutex_lock(&usb_pcwd->mtx);
+
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ usb_pcwd_stop(usb_pcwd);
+
+ /* We should now stop communicating with the USB PCWD device */
+ usb_pcwd->exists = 0;
+
+ /* Deregister */
+ misc_deregister(&usb_pcwd_miscdev);
+ misc_deregister(&usb_pcwd_temperature_miscdev);
+ unregister_reboot_notifier(&usb_pcwd_notifier);
+
+ mutex_unlock(&usb_pcwd->mtx);
+
+ /* Delete the USB PCWD device */
+ usb_pcwd_delete(usb_pcwd);
+
+ cards_found--;
+
+ mutex_unlock(&disconnect_mutex);
+
+ printk(KERN_INFO PFX "USB PC Watchdog disconnected\n");
+}
+
+
+
+/**
+ * usb_pcwd_init
+ */
+static int __init usb_pcwd_init(void)
+{
+ int result;
+
+ /* register this driver with the USB subsystem */
+ result = usb_register(&usb_pcwd_driver);
+ if (result) {
+ printk(KERN_ERR PFX "usb_register failed. Error number %d\n",
+ result);
+ return result;
+ }
+
+ printk(KERN_INFO PFX DRIVER_DESC " v" DRIVER_VERSION " (" DRIVER_DATE ")\n");
+ return 0;
+}
+
+
+/**
+ * usb_pcwd_exit
+ */
+static void __exit usb_pcwd_exit(void)
+{
+ /* deregister this driver with the USB subsystem */
+ usb_deregister(&usb_pcwd_driver);
+}
+
+
+module_init (usb_pcwd_init);
+module_exit (usb_pcwd_exit);
--- /dev/null
+/*
+ * drivers/char/watchdog/pnx4008_wdt.c
+ *
+ * Watchdog driver for PNX4008 board
+ *
+ * Authors: Dmitry Chigirev <source@mvista.com>,
+ * Vitaly Wool <vitalywool@gmail.com>
+ * Based on sa1100 driver,
+ * Copyright (C) 2000 Oleg Drokin <green@crimea.edu>
+ *
+ * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+
+#include <asm/hardware.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define MODULE_NAME "PNX4008-WDT: "
+
+/* WatchDog Timer - Chapter 23 Page 207 */
+
+#define DEFAULT_HEARTBEAT 19
+#define MAX_HEARTBEAT 60
+
+/* Watchdog timer register set definition */
+#define WDTIM_INT(p) ((p) + 0x0)
+#define WDTIM_CTRL(p) ((p) + 0x4)
+#define WDTIM_COUNTER(p) ((p) + 0x8)
+#define WDTIM_MCTRL(p) ((p) + 0xC)
+#define WDTIM_MATCH0(p) ((p) + 0x10)
+#define WDTIM_EMR(p) ((p) + 0x14)
+#define WDTIM_PULSE(p) ((p) + 0x18)
+#define WDTIM_RES(p) ((p) + 0x1C)
+
+/* WDTIM_INT bit definitions */
+#define MATCH_INT 1
+
+/* WDTIM_CTRL bit definitions */
+#define COUNT_ENAB 1
+#define RESET_COUNT (1<<1)
+#define DEBUG_EN (1<<2)
+
+/* WDTIM_MCTRL bit definitions */
+#define MR0_INT 1
+#undef RESET_COUNT0
+#define RESET_COUNT0 (1<<2)
+#define STOP_COUNT0 (1<<2)
+#define M_RES1 (1<<3)
+#define M_RES2 (1<<4)
+#define RESFRC1 (1<<5)
+#define RESFRC2 (1<<6)
+
+/* WDTIM_EMR bit definitions */
+#define EXT_MATCH0 1
+#define MATCH_OUTPUT_HIGH (2<<4) /*a MATCH_CTRL setting */
+
+/* WDTIM_RES bit definitions */
+#define WDOG_RESET 1 /* read only */
+
+#define WDOG_COUNTER_RATE 13000000 /*the counter clock is 13 MHz fixed */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static int heartbeat = DEFAULT_HEARTBEAT;
+
+static spinlock_t io_lock;
+static unsigned long wdt_status;
+#define WDT_IN_USE 0
+#define WDT_OK_TO_CLOSE 1
+#define WDT_REGION_INITED 2
+#define WDT_DEVICE_INITED 3
+
+static unsigned long boot_status;
+
+static struct resource *wdt_mem;
+static void __iomem *wdt_base;
+struct clk *wdt_clk;
+
+static void wdt_enable(void)
+{
+ spin_lock(&io_lock);
+
+ if (wdt_clk)
+ clk_set_rate(wdt_clk, 1);
+
+ /* stop counter, initiate counter reset */
+ __raw_writel(RESET_COUNT, WDTIM_CTRL(wdt_base));
+ /*wait for reset to complete. 100% guarantee event */
+ while (__raw_readl(WDTIM_COUNTER(wdt_base)))
+ cpu_relax();
+ /* internal and external reset, stop after that */
+ __raw_writel(M_RES2 | STOP_COUNT0 | RESET_COUNT0,
+ WDTIM_MCTRL(wdt_base));
+ /* configure match output */
+ __raw_writel(MATCH_OUTPUT_HIGH, WDTIM_EMR(wdt_base));
+ /* clear interrupt, just in case */
+ __raw_writel(MATCH_INT, WDTIM_INT(wdt_base));
+ /* the longest pulse period 65541/(13*10^6) seconds ~ 5 ms. */
+ __raw_writel(0xFFFF, WDTIM_PULSE(wdt_base));
+ __raw_writel(heartbeat * WDOG_COUNTER_RATE, WDTIM_MATCH0(wdt_base));
+ /*enable counter, stop when debugger active */
+ __raw_writel(COUNT_ENAB | DEBUG_EN, WDTIM_CTRL(wdt_base));
+
+ spin_unlock(&io_lock);
+}
+
+static void wdt_disable(void)
+{
+ spin_lock(&io_lock);
+
+ __raw_writel(0, WDTIM_CTRL(wdt_base)); /*stop counter */
+ if (wdt_clk)
+ clk_set_rate(wdt_clk, 0);
+
+ spin_unlock(&io_lock);
+}
+
+static int pnx4008_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(WDT_IN_USE, &wdt_status))
+ return -EBUSY;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t
+pnx4008_wdt_write(struct file *file, const char *data, size_t len,
+ loff_t * ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ set_bit(WDT_OK_TO_CLOSE, &wdt_status);
+ }
+ }
+ wdt_enable();
+ }
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "PNX4008 Watchdog",
+};
+
+static int
+pnx4008_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret = -ENOTTY;
+ int time;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user((struct watchdog_info *)arg, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(boot_status, (int *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(time, (int *)arg);
+ if (ret)
+ break;
+
+ if (time <= 0 || time > MAX_HEARTBEAT) {
+ ret = -EINVAL;
+ break;
+ }
+
+ heartbeat = time;
+ wdt_enable();
+ /* Fall through */
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(heartbeat, (int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_enable();
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int pnx4008_wdt_release(struct inode *inode, struct file *file)
+{
+ if (!test_bit(WDT_OK_TO_CLOSE, &wdt_status))
+ printk(KERN_WARNING "WATCHDOG: Device closed unexpectdly\n");
+
+ wdt_disable();
+ clear_bit(WDT_IN_USE, &wdt_status);
+ clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
+
+ return 0;
+}
+
+static const struct file_operations pnx4008_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = pnx4008_wdt_write,
+ .ioctl = pnx4008_wdt_ioctl,
+ .open = pnx4008_wdt_open,
+ .release = pnx4008_wdt_release,
+};
+
+static struct miscdevice pnx4008_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &pnx4008_wdt_fops,
+};
+
+static int pnx4008_wdt_probe(struct platform_device *pdev)
+{
+ int ret = 0, size;
+ struct resource *res;
+
+ spin_lock_init(&io_lock);
+
+ if (heartbeat < 1 || heartbeat > MAX_HEARTBEAT)
+ heartbeat = DEFAULT_HEARTBEAT;
+
+ printk(KERN_INFO MODULE_NAME
+ "PNX4008 Watchdog Timer: heartbeat %d sec\n", heartbeat);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ printk(KERN_INFO MODULE_NAME
+ "failed to get memory region resouce\n");
+ return -ENOENT;
+ }
+
+ size = res->end - res->start + 1;
+ wdt_mem = request_mem_region(res->start, size, pdev->name);
+
+ if (wdt_mem == NULL) {
+ printk(KERN_INFO MODULE_NAME "failed to get memory region\n");
+ return -ENOENT;
+ }
+ wdt_base = (void __iomem *)IO_ADDRESS(res->start);
+
+ wdt_clk = clk_get(&pdev->dev, "wdt_ck");
+ if (IS_ERR(wdt_clk)) {
+ ret = PTR_ERR(wdt_clk);
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ goto out;
+ } else
+ clk_set_rate(wdt_clk, 1);
+
+ ret = misc_register(&pnx4008_wdt_miscdev);
+ if (ret < 0) {
+ printk(KERN_ERR MODULE_NAME "cannot register misc device\n");
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ clk_set_rate(wdt_clk, 0);
+ } else {
+ boot_status = (__raw_readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ?
+ WDIOF_CARDRESET : 0;
+ wdt_disable(); /*disable for now */
+ set_bit(WDT_DEVICE_INITED, &wdt_status);
+ }
+
+out:
+ return ret;
+}
+
+static int pnx4008_wdt_remove(struct platform_device *pdev)
+{
+ misc_deregister(&pnx4008_wdt_miscdev);
+ if (wdt_clk) {
+ clk_set_rate(wdt_clk, 0);
+ clk_put(wdt_clk);
+ wdt_clk = NULL;
+ }
+ if (wdt_mem) {
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ wdt_mem = NULL;
+ }
+ return 0;
+}
+
+static struct platform_driver platform_wdt_driver = {
+ .driver = {
+ .name = "watchdog",
+ },
+ .probe = pnx4008_wdt_probe,
+ .remove = pnx4008_wdt_remove,
+};
+
+static int __init pnx4008_wdt_init(void)
+{
+ return platform_driver_register(&platform_wdt_driver);
+}
+
+static void __exit pnx4008_wdt_exit(void)
+{
+ return platform_driver_unregister(&platform_wdt_driver);
+}
+
+module_init(pnx4008_wdt_init);
+module_exit(pnx4008_wdt_exit);
+
+MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
+MODULE_DESCRIPTION("PNX4008 Watchdog Driver");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat period in seconds from 1 to "
+ __MODULE_STRING(MAX_HEARTBEAT) ", default "
+ __MODULE_STRING(DEFAULT_HEARTBEAT));
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout,
+ "Set to 1 to keep watchdog running after device release");
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog implementation for GPI h/w found on PMC-Sierra RM9xxx
+ * chips.
+ *
+ * Copyright (C) 2004 by Basler Vision Technologies AG
+ * Author: Thomas Koeller <thomas.koeller@baslerweb.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/notifier.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <asm/io.h>
+#include <asm/atomic.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/rm9k-ocd.h>
+
+#include <rm9k_wdt.h>
+
+
+#define CLOCK 125000000
+#define MAX_TIMEOUT_SECONDS 32
+#define CPCCR 0x0080
+#define CPGIG1SR 0x0044
+#define CPGIG1ER 0x0054
+
+
+/* Function prototypes */
+static irqreturn_t wdt_gpi_irqhdl(int, void *);
+static void wdt_gpi_start(void);
+static void wdt_gpi_stop(void);
+static void wdt_gpi_set_timeout(unsigned int);
+static int wdt_gpi_open(struct inode *, struct file *);
+static int wdt_gpi_release(struct inode *, struct file *);
+static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *);
+static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long);
+static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *);
+static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int);
+static int __init wdt_gpi_probe(struct device *);
+static int __exit wdt_gpi_remove(struct device *);
+
+
+static const char wdt_gpi_name[] = "wdt_gpi";
+static atomic_t opencnt;
+static int expect_close;
+static int locked;
+
+
+/* These are set from device resources */
+static void __iomem * wd_regs;
+static unsigned int wd_irq, wd_ctr;
+
+
+/* Module arguments */
+static int timeout = MAX_TIMEOUT_SECONDS;
+module_param(timeout, int, 0444);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds");
+
+static unsigned long resetaddr = 0xbffdc200;
+module_param(resetaddr, ulong, 0444);
+MODULE_PARM_DESC(resetaddr, "Address to write to to force a reset");
+
+static unsigned long flagaddr = 0xbffdc104;
+module_param(flagaddr, ulong, 0444);
+MODULE_PARM_DESC(flagaddr, "Address to write to boot flags to");
+
+static int powercycle;
+module_param(powercycle, bool, 0444);
+MODULE_PARM_DESC(powercycle, "Cycle power if watchdog expires");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0444);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be disabled once started");
+
+
+/* Kernel interfaces */
+static const struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = wdt_gpi_open,
+ .release = wdt_gpi_release,
+ .write = wdt_gpi_write,
+ .unlocked_ioctl = wdt_gpi_ioctl,
+};
+
+static struct miscdevice miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = wdt_gpi_name,
+ .fops = &fops,
+};
+
+static struct notifier_block wdt_gpi_shutdown = {
+ .notifier_call = wdt_gpi_notify,
+};
+
+
+/* Interrupt handler */
+static irqreturn_t wdt_gpi_irqhdl(int irq, void *ctxt)
+{
+ if (!unlikely(__raw_readl(wd_regs + 0x0008) & 0x1))
+ return IRQ_NONE;
+ __raw_writel(0x1, wd_regs + 0x0008);
+
+
+ printk(KERN_CRIT "%s: watchdog expired - resetting system\n",
+ wdt_gpi_name);
+
+ *(volatile char *) flagaddr |= 0x01;
+ *(volatile char *) resetaddr = powercycle ? 0x01 : 0x2;
+ iob();
+ while (1)
+ cpu_relax();
+}
+
+
+/* Watchdog functions */
+static void wdt_gpi_start(void)
+{
+ u32 reg;
+
+ lock_titan_regs();
+ reg = titan_readl(CPGIG1ER);
+ titan_writel(reg | (0x100 << wd_ctr), CPGIG1ER);
+ iob();
+ unlock_titan_regs();
+}
+
+static void wdt_gpi_stop(void)
+{
+ u32 reg;
+
+ lock_titan_regs();
+ reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
+ titan_writel(reg, CPCCR);
+ reg = titan_readl(CPGIG1ER);
+ titan_writel(reg & ~(0x100 << wd_ctr), CPGIG1ER);
+ iob();
+ unlock_titan_regs();
+}
+
+static void wdt_gpi_set_timeout(unsigned int to)
+{
+ u32 reg;
+ const u32 wdval = (to * CLOCK) & ~0x0000000f;
+
+ lock_titan_regs();
+ reg = titan_readl(CPCCR) & ~(0xf << (wd_ctr * 4));
+ titan_writel(reg, CPCCR);
+ wmb();
+ __raw_writel(wdval, wd_regs + 0x0000);
+ wmb();
+ titan_writel(reg | (0x2 << (wd_ctr * 4)), CPCCR);
+ wmb();
+ titan_writel(reg | (0x5 << (wd_ctr * 4)), CPCCR);
+ iob();
+ unlock_titan_regs();
+}
+
+
+/* /dev/watchdog operations */
+static int wdt_gpi_open(struct inode *inode, struct file *file)
+{
+ int res;
+
+ if (unlikely(atomic_dec_if_positive(&opencnt) < 0))
+ return -EBUSY;
+
+ expect_close = 0;
+ if (locked) {
+ module_put(THIS_MODULE);
+ free_irq(wd_irq, &miscdev);
+ locked = 0;
+ }
+
+ res = request_irq(wd_irq, wdt_gpi_irqhdl, IRQF_SHARED | IRQF_DISABLED,
+ wdt_gpi_name, &miscdev);
+ if (unlikely(res))
+ return res;
+
+ wdt_gpi_set_timeout(timeout);
+ wdt_gpi_start();
+
+ printk(KERN_INFO "%s: watchdog started, timeout = %u seconds\n",
+ wdt_gpi_name, timeout);
+ return nonseekable_open(inode, file);
+}
+
+static int wdt_gpi_release(struct inode *inode, struct file *file)
+{
+ if (nowayout) {
+ printk(KERN_INFO "%s: no way out - watchdog left running\n",
+ wdt_gpi_name);
+ __module_get(THIS_MODULE);
+ locked = 1;
+ } else {
+ if (expect_close) {
+ wdt_gpi_stop();
+ free_irq(wd_irq, &miscdev);
+ printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name);
+ } else {
+ printk(KERN_CRIT "%s: unexpected close() -"
+ " watchdog left running\n",
+ wdt_gpi_name);
+ wdt_gpi_set_timeout(timeout);
+ __module_get(THIS_MODULE);
+ locked = 1;
+ }
+ }
+
+ atomic_inc(&opencnt);
+ return 0;
+}
+
+static ssize_t
+wdt_gpi_write(struct file *f, const char __user *d, size_t s, loff_t *o)
+{
+ char val;
+
+ wdt_gpi_set_timeout(timeout);
+ expect_close = (s > 0) && !get_user(val, d) && (val == 'V');
+ return s ? 1 : 0;
+}
+
+static long
+wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+{
+ long res = -ENOTTY;
+ const long size = _IOC_SIZE(cmd);
+ int stat;
+ void __user *argp = (void __user *)arg;
+ static struct watchdog_info wdinfo = {
+ .identity = "RM9xxx/GPI watchdog",
+ .firmware_version = 0,
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING
+ };
+
+ if (unlikely(_IOC_TYPE(cmd) != WATCHDOG_IOCTL_BASE))
+ return -ENOTTY;
+
+ if ((_IOC_DIR(cmd) & _IOC_READ)
+ && !access_ok(VERIFY_WRITE, arg, size))
+ return -EFAULT;
+
+ if ((_IOC_DIR(cmd) & _IOC_WRITE)
+ && !access_ok(VERIFY_READ, arg, size))
+ return -EFAULT;
+
+ expect_close = 0;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ wdinfo.options = nowayout ?
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING :
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE;
+ res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size;
+ break;
+
+ case WDIOC_GETSTATUS:
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ stat = (*(volatile char *) flagaddr & 0x01)
+ ? WDIOF_CARDRESET : 0;
+ res = __copy_to_user(argp, &stat, size) ?
+ -EFAULT : size;
+ break;
+
+ case WDIOC_SETOPTIONS:
+ break;
+
+ case WDIOC_KEEPALIVE:
+ wdt_gpi_set_timeout(timeout);
+ res = size;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ {
+ int val;
+ if (unlikely(__copy_from_user(&val, argp, size))) {
+ res = -EFAULT;
+ break;
+ }
+
+ if (val > MAX_TIMEOUT_SECONDS)
+ val = MAX_TIMEOUT_SECONDS;
+ timeout = val;
+ wdt_gpi_set_timeout(val);
+ res = size;
+ printk(KERN_INFO "%s: timeout set to %u seconds\n",
+ wdt_gpi_name, timeout);
+ }
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ res = __copy_to_user(argp, &timeout, size) ?
+ -EFAULT : size;
+ break;
+ }
+
+ return res;
+}
+
+
+/* Shutdown notifier */
+static int
+wdt_gpi_notify(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ wdt_gpi_stop();
+
+ return NOTIFY_DONE;
+}
+
+
+/* Init & exit procedures */
+static const struct resource *
+wdt_gpi_get_resource(struct platform_device *pdv, const char *name,
+ unsigned int type)
+{
+ char buf[80];
+ if (snprintf(buf, sizeof buf, "%s_0", name) >= sizeof buf)
+ return NULL;
+ return platform_get_resource_byname(pdv, type, buf);
+}
+
+/* No hotplugging on the platform bus - use __init */
+static int __init wdt_gpi_probe(struct device *dev)
+{
+ int res;
+ struct platform_device * const pdv = to_platform_device(dev);
+ const struct resource
+ * const rr = wdt_gpi_get_resource(pdv, WDT_RESOURCE_REGS,
+ IORESOURCE_MEM),
+ * const ri = wdt_gpi_get_resource(pdv, WDT_RESOURCE_IRQ,
+ IORESOURCE_IRQ),
+ * const rc = wdt_gpi_get_resource(pdv, WDT_RESOURCE_COUNTER,
+ 0);
+
+ if (unlikely(!rr || !ri || !rc))
+ return -ENXIO;
+
+ wd_regs = ioremap_nocache(rr->start, rr->end + 1 - rr->start);
+ if (unlikely(!wd_regs))
+ return -ENOMEM;
+ wd_irq = ri->start;
+ wd_ctr = rc->start;
+ res = misc_register(&miscdev);
+ if (res)
+ iounmap(wd_regs);
+ else
+ register_reboot_notifier(&wdt_gpi_shutdown);
+ return res;
+}
+
+static int __exit wdt_gpi_remove(struct device *dev)
+{
+ int res;
+
+ unregister_reboot_notifier(&wdt_gpi_shutdown);
+ res = misc_deregister(&miscdev);
+ iounmap(wd_regs);
+ wd_regs = NULL;
+ return res;
+}
+
+
+/* Device driver init & exit */
+static struct device_driver wdt_gpi_driver = {
+ .name = (char *) wdt_gpi_name,
+ .bus = &platform_bus_type,
+ .owner = THIS_MODULE,
+ .probe = wdt_gpi_probe,
+ .remove = __exit_p(wdt_gpi_remove),
+ .shutdown = NULL,
+ .suspend = NULL,
+ .resume = NULL,
+};
+
+static int __init wdt_gpi_init_module(void)
+{
+ atomic_set(&opencnt, 1);
+ if (timeout > MAX_TIMEOUT_SECONDS)
+ timeout = MAX_TIMEOUT_SECONDS;
+ return driver_register(&wdt_gpi_driver);
+}
+
+static void __exit wdt_gpi_cleanup_module(void)
+{
+ driver_unregister(&wdt_gpi_driver);
+}
+
+module_init(wdt_gpi_init_module);
+module_exit(wdt_gpi_cleanup_module);
+
+MODULE_AUTHOR("Thomas Koeller <thomas.koeller@baslerweb.com>");
+MODULE_DESCRIPTION("Basler eXcite watchdog driver for gpi devices");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
--- /dev/null
+/* linux/drivers/char/watchdog/s3c2410_wdt.c
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 Watchdog Timer Support
+ *
+ * Based on, softdog.c by Alan Cox,
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Changelog:
+ * 05-Oct-2004 BJD Added semaphore init to stop crashes on open
+ * Fixed tmr_count / wdt_count confusion
+ * Added configurable debug
+ *
+ * 11-Jan-2005 BJD Fixed divide-by-2 in timeout code
+ *
+ * 25-Jan-2005 DA Added suspend/resume support
+ * Replaced reboot notifier with .shutdown method
+ *
+ * 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
+*/
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#include <asm/arch/map.h>
+
+#undef S3C_VA_WATCHDOG
+#define S3C_VA_WATCHDOG (0)
+
+#include <asm/plat-s3c/regs-watchdog.h>
+
+#define PFX "s3c2410-wdt: "
+
+#define CONFIG_S3C2410_WATCHDOG_ATBOOT (0)
+#define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15)
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME;
+static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT;
+static int soft_noboot = 0;
+static int debug = 0;
+
+module_param(tmr_margin, int, 0);
+module_param(tmr_atboot, int, 0);
+module_param(nowayout, int, 0);
+module_param(soft_noboot, int, 0);
+module_param(debug, int, 0);
+
+MODULE_PARM_DESC(tmr_margin, "Watchdog tmr_margin in seconds. default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME) ")");
+
+MODULE_PARM_DESC(tmr_atboot, "Watchdog is started at boot time if set to 1, default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_ATBOOT));
+
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
+
+MODULE_PARM_DESC(debug, "Watchdog debug, set to >1 for debug, (default 0)");
+
+
+typedef enum close_state {
+ CLOSE_STATE_NOT,
+ CLOSE_STATE_ALLOW=0x4021
+} close_state_t;
+
+static DECLARE_MUTEX(open_lock);
+
+static struct device *wdt_dev; /* platform device attached to */
+static struct resource *wdt_mem;
+static struct resource *wdt_irq;
+static struct clk *wdt_clock;
+static void __iomem *wdt_base;
+static unsigned int wdt_count;
+static close_state_t allow_close;
+
+/* watchdog control routines */
+
+#define DBG(msg...) do { \
+ if (debug) \
+ printk(KERN_INFO msg); \
+ } while(0)
+
+/* functions */
+
+static int s3c2410wdt_keepalive(void)
+{
+ writel(wdt_count, wdt_base + S3C2410_WTCNT);
+ return 0;
+}
+
+static int s3c2410wdt_stop(void)
+{
+ unsigned long wtcon;
+
+ wtcon = readl(wdt_base + S3C2410_WTCON);
+ wtcon &= ~(S3C2410_WTCON_ENABLE | S3C2410_WTCON_RSTEN);
+ writel(wtcon, wdt_base + S3C2410_WTCON);
+
+ return 0;
+}
+
+static int s3c2410wdt_start(void)
+{
+ unsigned long wtcon;
+
+ s3c2410wdt_stop();
+
+ wtcon = readl(wdt_base + S3C2410_WTCON);
+ wtcon |= S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128;
+
+ if (soft_noboot) {
+ wtcon |= S3C2410_WTCON_INTEN;
+ wtcon &= ~S3C2410_WTCON_RSTEN;
+ } else {
+ wtcon &= ~S3C2410_WTCON_INTEN;
+ wtcon |= S3C2410_WTCON_RSTEN;
+ }
+
+ DBG("%s: wdt_count=0x%08x, wtcon=%08lx\n",
+ __FUNCTION__, wdt_count, wtcon);
+
+ writel(wdt_count, wdt_base + S3C2410_WTDAT);
+ writel(wdt_count, wdt_base + S3C2410_WTCNT);
+ writel(wtcon, wdt_base + S3C2410_WTCON);
+
+ return 0;
+}
+
+static int s3c2410wdt_set_heartbeat(int timeout)
+{
+ unsigned int freq = clk_get_rate(wdt_clock);
+ unsigned int count;
+ unsigned int divisor = 1;
+ unsigned long wtcon;
+
+ if (timeout < 1)
+ return -EINVAL;
+
+ freq /= 128;
+ count = timeout * freq;
+
+ DBG("%s: count=%d, timeout=%d, freq=%d\n",
+ __FUNCTION__, count, timeout, freq);
+
+ /* if the count is bigger than the watchdog register,
+ then work out what we need to do (and if) we can
+ actually make this value
+ */
+
+ if (count >= 0x10000) {
+ for (divisor = 1; divisor <= 0x100; divisor++) {
+ if ((count / divisor) < 0x10000)
+ break;
+ }
+
+ if ((count / divisor) >= 0x10000) {
+ dev_err(wdt_dev, "timeout %d too big\n", timeout);
+ return -EINVAL;
+ }
+ }
+
+ tmr_margin = timeout;
+
+ DBG("%s: timeout=%d, divisor=%d, count=%d (%08x)\n",
+ __FUNCTION__, timeout, divisor, count, count/divisor);
+
+ count /= divisor;
+ wdt_count = count;
+
+ /* update the pre-scaler */
+ wtcon = readl(wdt_base + S3C2410_WTCON);
+ wtcon &= ~S3C2410_WTCON_PRESCALE_MASK;
+ wtcon |= S3C2410_WTCON_PRESCALE(divisor-1);
+
+ writel(count, wdt_base + S3C2410_WTDAT);
+ writel(wtcon, wdt_base + S3C2410_WTCON);
+
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int s3c2410wdt_open(struct inode *inode, struct file *file)
+{
+ if(down_trylock(&open_lock))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ allow_close = CLOSE_STATE_NOT;
+
+ /* start the timer */
+ s3c2410wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int s3c2410wdt_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+
+ if (allow_close == CLOSE_STATE_ALLOW) {
+ s3c2410wdt_stop();
+ } else {
+ dev_err(wdt_dev, "Unexpected close, not stopping watchdog\n");
+ s3c2410wdt_keepalive();
+ }
+
+ allow_close = CLOSE_STATE_NOT;
+ up(&open_lock);
+ return 0;
+}
+
+static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /*
+ * Refresh the timer.
+ */
+ if(len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ allow_close = CLOSE_STATE_NOT;
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ allow_close = CLOSE_STATE_ALLOW;
+ }
+ }
+
+ s3c2410wdt_keepalive();
+ }
+ return len;
+}
+
+#define OPTIONS WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE
+
+static struct watchdog_info s3c2410_wdt_ident = {
+ .options = OPTIONS,
+ .firmware_version = 0,
+ .identity = "S3C2410 Watchdog",
+};
+
+
+static int s3c2410wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_margin;
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &s3c2410_wdt_ident,
+ sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ s3c2410wdt_keepalive();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+
+ if (s3c2410wdt_set_heartbeat(new_margin))
+ return -EINVAL;
+
+ s3c2410wdt_keepalive();
+ return put_user(tmr_margin, p);
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(tmr_margin, p);
+ }
+}
+
+/* kernel interface */
+
+static const struct file_operations s3c2410wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = s3c2410wdt_write,
+ .ioctl = s3c2410wdt_ioctl,
+ .open = s3c2410wdt_open,
+ .release = s3c2410wdt_release,
+};
+
+static struct miscdevice s3c2410wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &s3c2410wdt_fops,
+};
+
+/* interrupt handler code */
+
+static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
+{
+ dev_info(wdt_dev, "watchdog timer expired (irq)\n");
+
+ s3c2410wdt_keepalive();
+ return IRQ_HANDLED;
+}
+/* device interface */
+
+static int s3c2410wdt_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct device *dev;
+ unsigned int wtcon;
+ int started = 0;
+ int ret;
+ int size;
+
+ DBG("%s: probe=%p\n", __FUNCTION__, pdev);
+
+ dev = &pdev->dev;
+ wdt_dev = &pdev->dev;
+
+ /* get the memory region for the watchdog timer */
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(dev, "no memory resource specified\n");
+ return -ENOENT;
+ }
+
+ size = (res->end-res->start)+1;
+ wdt_mem = request_mem_region(res->start, size, pdev->name);
+ if (wdt_mem == NULL) {
+ dev_err(dev, "failed to get memory region\n");
+ ret = -ENOENT;
+ goto err_req;
+ }
+
+ wdt_base = ioremap(res->start, size);
+ if (wdt_base == 0) {
+ dev_err(dev, "failed to ioremap() region\n");
+ ret = -EINVAL;
+ goto err_req;
+ }
+
+ DBG("probe: mapped wdt_base=%p\n", wdt_base);
+
+ wdt_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (wdt_irq == NULL) {
+ dev_err(dev, "no irq resource specified\n");
+ ret = -ENOENT;
+ goto err_map;
+ }
+
+ ret = request_irq(wdt_irq->start, s3c2410wdt_irq, 0, pdev->name, pdev);
+ if (ret != 0) {
+ dev_err(dev, "failed to install irq (%d)\n", ret);
+ goto err_map;
+ }
+
+ wdt_clock = clk_get(&pdev->dev, "watchdog");
+ if (IS_ERR(wdt_clock)) {
+ dev_err(dev, "failed to find watchdog clock source\n");
+ ret = PTR_ERR(wdt_clock);
+ goto err_irq;
+ }
+
+ clk_enable(wdt_clock);
+
+ /* see if we can actually set the requested timer margin, and if
+ * not, try the default value */
+
+ if (s3c2410wdt_set_heartbeat(tmr_margin)) {
+ started = s3c2410wdt_set_heartbeat(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
+
+ if (started == 0) {
+ dev_info(dev,"tmr_margin value out of range, default %d used\n",
+ CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
+ } else {
+ dev_info(dev, "default timer value is out of range, cannot start\n");
+ }
+ }
+
+ ret = misc_register(&s3c2410wdt_miscdev);
+ if (ret) {
+ dev_err(dev, "cannot register miscdev on minor=%d (%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_clk;
+ }
+
+ if (tmr_atboot && started == 0) {
+ dev_info(dev, "starting watchdog timer\n");
+ s3c2410wdt_start();
+ } else if (!tmr_atboot) {
+ /* if we're not enabling the watchdog, then ensure it is
+ * disabled if it has been left running from the bootloader
+ * or other source */
+
+ s3c2410wdt_stop();
+ }
+
+ /* print out a statement of readiness */
+
+ wtcon = readl(wdt_base + S3C2410_WTCON);
+
+ dev_info(dev, "watchdog %sactive, reset %sabled, irq %sabled\n",
+ (wtcon & S3C2410_WTCON_ENABLE) ? "" : "in",
+ (wtcon & S3C2410_WTCON_RSTEN) ? "" : "dis",
+ (wtcon & S3C2410_WTCON_INTEN) ? "" : "en");
+
+ return 0;
+
+ err_clk:
+ clk_disable(wdt_clock);
+ clk_put(wdt_clock);
+
+ err_irq:
+ free_irq(wdt_irq->start, pdev);
+
+ err_map:
+ iounmap(wdt_base);
+
+ err_req:
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+
+ return ret;
+}
+
+static int s3c2410wdt_remove(struct platform_device *dev)
+{
+ release_resource(wdt_mem);
+ kfree(wdt_mem);
+ wdt_mem = NULL;
+
+ free_irq(wdt_irq->start, dev);
+ wdt_irq = NULL;
+
+ clk_disable(wdt_clock);
+ clk_put(wdt_clock);
+ wdt_clock = NULL;
+
+ iounmap(wdt_base);
+ misc_deregister(&s3c2410wdt_miscdev);
+ return 0;
+}
+
+static void s3c2410wdt_shutdown(struct platform_device *dev)
+{
+ s3c2410wdt_stop();
+}
+
+#ifdef CONFIG_PM
+
+static unsigned long wtcon_save;
+static unsigned long wtdat_save;
+
+static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
+{
+ /* Save watchdog state, and turn it off. */
+ wtcon_save = readl(wdt_base + S3C2410_WTCON);
+ wtdat_save = readl(wdt_base + S3C2410_WTDAT);
+
+ /* Note that WTCNT doesn't need to be saved. */
+ s3c2410wdt_stop();
+
+ return 0;
+}
+
+static int s3c2410wdt_resume(struct platform_device *dev)
+{
+ /* Restore watchdog state. */
+
+ writel(wtdat_save, wdt_base + S3C2410_WTDAT);
+ writel(wtdat_save, wdt_base + S3C2410_WTCNT); /* Reset count */
+ writel(wtcon_save, wdt_base + S3C2410_WTCON);
+
+ printk(KERN_INFO PFX "watchdog %sabled\n",
+ (wtcon_save & S3C2410_WTCON_ENABLE) ? "en" : "dis");
+
+ return 0;
+}
+
+#else
+#define s3c2410wdt_suspend NULL
+#define s3c2410wdt_resume NULL
+#endif /* CONFIG_PM */
+
+
+static struct platform_driver s3c2410wdt_driver = {
+ .probe = s3c2410wdt_probe,
+ .remove = s3c2410wdt_remove,
+ .shutdown = s3c2410wdt_shutdown,
+ .suspend = s3c2410wdt_suspend,
+ .resume = s3c2410wdt_resume,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "s3c2410-wdt",
+ },
+};
+
+
+static char banner[] __initdata = KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
+
+static int __init watchdog_init(void)
+{
+ printk(banner);
+ return platform_driver_register(&s3c2410wdt_driver);
+}
+
+static void __exit watchdog_exit(void)
+{
+ platform_driver_unregister(&s3c2410wdt_driver);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, "
+ "Dimitry Andric <dimitry.andric@tomtom.com>");
+MODULE_DESCRIPTION("S3C2410 Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Watchdog driver for the SA11x0/PXA2xx
+ *
+ * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
+ * Based on SoftDog driver by Alan Cox <alan@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Oleg Drokin nor iXcelerator.com admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 2000 Oleg Drokin <green@crimea.edu>
+ *
+ * 27/11/2000 Initial release
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/init.h>
+
+#ifdef CONFIG_ARCH_PXA
+#include <asm/arch/pxa-regs.h>
+#endif
+
+#include <asm/hardware.h>
+#include <asm/bitops.h>
+#include <asm/uaccess.h>
+
+#define OSCR_FREQ CLOCK_TICK_RATE
+
+static unsigned long sa1100wdt_users;
+static int pre_margin;
+static int boot_status;
+
+/*
+ * Allow only one person to hold it open
+ */
+static int sa1100dog_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(1,&sa1100wdt_users))
+ return -EBUSY;
+
+ /* Activate SA1100 Watchdog timer */
+ OSMR3 = OSCR + pre_margin;
+ OSSR = OSSR_M3;
+ OWER = OWER_WME;
+ OIER |= OIER_E3;
+ return nonseekable_open(inode, file);
+}
+
+/*
+ * The watchdog cannot be disabled.
+ *
+ * Previous comments suggested that turning off the interrupt by
+ * clearing OIER[E3] would prevent the watchdog timing out but this
+ * does not appear to be true (at least on the PXA255).
+ */
+static int sa1100dog_release(struct inode *inode, struct file *file)
+{
+ printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
+
+ clear_bit(1, &sa1100wdt_users);
+
+ return 0;
+}
+
+static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+{
+ if (len)
+ /* Refresh OSMR3 timer. */
+ OSMR3 = OSCR + pre_margin;
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .identity = "SA1100/PXA255 Watchdog",
+};
+
+static int sa1100dog_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int ret = -ENOTTY;
+ int time;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = copy_to_user(argp, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, p);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(boot_status, p);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(time, p);
+ if (ret)
+ break;
+
+ if (time <= 0 || time > 255) {
+ ret = -EINVAL;
+ break;
+ }
+
+ pre_margin = OSCR_FREQ * time;
+ OSMR3 = OSCR + pre_margin;
+ /*fall through*/
+
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(pre_margin / OSCR_FREQ, p);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ OSMR3 = OSCR + pre_margin;
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static const struct file_operations sa1100dog_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = sa1100dog_write,
+ .ioctl = sa1100dog_ioctl,
+ .open = sa1100dog_open,
+ .release = sa1100dog_release,
+};
+
+static struct miscdevice sa1100dog_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &sa1100dog_fops,
+};
+
+static int margin __initdata = 60; /* (secs) Default is 1 minute */
+
+static int __init sa1100dog_init(void)
+{
+ int ret;
+
+ /*
+ * Read the reset status, and save it for later. If
+ * we suspend, RCSR will be cleared, and the watchdog
+ * reset reason will be lost.
+ */
+ boot_status = (RCSR & RCSR_WDR) ? WDIOF_CARDRESET : 0;
+ pre_margin = OSCR_FREQ * margin;
+
+ ret = misc_register(&sa1100dog_miscdev);
+ if (ret == 0)
+ printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
+ margin);
+ return ret;
+}
+
+static void __exit sa1100dog_exit(void)
+{
+ misc_deregister(&sa1100dog_miscdev);
+}
+
+module_init(sa1100dog_init);
+module_exit(sa1100dog_exit);
+
+MODULE_AUTHOR("Oleg Drokin <green@crimea.edu>");
+MODULE_DESCRIPTION("SA1100/PXA2xx Watchdog");
+
+module_param(margin, int, 0);
+MODULE_PARM_DESC(margin, "Watchdog margin in seconds (default 60s)");
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * 60xx Single Board Computer Watchdog Timer driver for Linux 2.2.x
+ *
+ * Based on acquirewdt.c by Alan Cox.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The author does NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (c) Copyright 2000 Jakob Oestergaard <jakob@unthought.net>
+ *
+ * 12/4 - 2000 [Initial revision]
+ * 25/4 - 2000 Added /dev/watchdog support
+ * 09/5 - 2001 [smj@oro.net] fixed fop_write to "return 1" on success
+ * 12/4 - 2002 [rob@osinvestor.com] eliminate fop_read
+ * fix possible wdt_is_open race
+ * add CONFIG_WATCHDOG_NOWAYOUT support
+ * remove lock_kernel/unlock_kernel pairs
+ * added KERN_* to printk's
+ * got rid of extraneous comments
+ * changed watchdog_info to correctly reflect what the driver offers
+ * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
+ * WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
+ * 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
+ * use module_param
+ * made timeout (the emulated heartbeat) a module_param
+ * made the keepalive ping an internal subroutine
+ * made wdt_stop and wdt_start module params
+ * added extra printk's for startup problems
+ * added MODULE_AUTHOR and MODULE_DESCRIPTION info
+ *
+ *
+ * This WDT driver is different from the other Linux WDT
+ * drivers in the following ways:
+ * *) The driver will ping the watchdog by itself, because this
+ * particular WDT has a very short timeout (one second) and it
+ * would be insane to count on any userspace daemon always
+ * getting scheduled within that time frame.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define OUR_NAME "sbc60xxwdt"
+#define PFX OUR_NAME ": "
+
+/*
+ * You must set these - The driver cannot probe for the settings
+ */
+
+static int wdt_stop = 0x45;
+module_param(wdt_stop, int, 0);
+MODULE_PARM_DESC(wdt_stop, "SBC60xx WDT 'stop' io port (default 0x45)");
+
+static int wdt_start = 0x443;
+module_param(wdt_start, int, 0);
+MODULE_PARM_DESC(wdt_start, "SBC60xx WDT 'start' io port (default 0x443)");
+
+/*
+ * The 60xx board can use watchdog timeout values from one second
+ * to several minutes. The default is one second, so if we reset
+ * the watchdog every ~250ms we should be safe.
+ */
+
+#define WDT_INTERVAL (HZ/4+1)
+
+/*
+ * We must not require too good response from the userspace daemon.
+ * Here we require the userspace daemon to send us a heartbeat
+ * char to /dev/watchdog every 30 seconds.
+ * If the daemon pulses us every 25 seconds, we can still afford
+ * a 5 second scheduling delay on the (high priority) daemon. That
+ * should be sufficient for a box under any load.
+ */
+
+#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static void wdt_timer_ping(unsigned long);
+static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
+static unsigned long next_heartbeat;
+static unsigned long wdt_is_open;
+static char wdt_expect_close;
+
+/*
+ * Whack the dog
+ */
+
+static void wdt_timer_ping(unsigned long data)
+{
+ /* If we got a heartbeat pulse within the WDT_US_INTERVAL
+ * we agree to ping the WDT
+ */
+ if(time_before(jiffies, next_heartbeat))
+ {
+ /* Ping the WDT by reading from wdt_start */
+ inb_p(wdt_start);
+ /* Re-set the timer interval */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+ } else {
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ }
+}
+
+/*
+ * Utility routines
+ */
+
+static void wdt_startup(void)
+{
+ next_heartbeat = jiffies + (timeout * HZ);
+
+ /* Start the timer */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+ printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
+}
+
+static void wdt_turnoff(void)
+{
+ /* Stop the timer */
+ del_timer(&timer);
+ inb_p(wdt_stop);
+ printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
+}
+
+static void wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count)
+ {
+ if (!nowayout)
+ {
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ wdt_expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for(ofs = 0; ofs != count; ofs++)
+ {
+ char c;
+ if(get_user(c, buf+ofs))
+ return -EFAULT;
+ if(c == 'V')
+ wdt_expect_close = 42;
+ }
+ }
+
+ /* Well, anyhow someone wrote to us, we should return that favour */
+ wdt_keepalive();
+ }
+ return count;
+}
+
+static int fop_open(struct inode * inode, struct file * file)
+{
+ /* Just in case we're already talking to someone... */
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Good, fire up the show */
+ wdt_startup();
+ return nonseekable_open(inode, file);
+}
+
+static int fop_close(struct inode * inode, struct file * file)
+{
+ if(wdt_expect_close == 42)
+ wdt_turnoff();
+ else {
+ del_timer(&timer);
+ printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ }
+ clear_bit(0, &wdt_is_open);
+ wdt_expect_close = 0;
+ return 0;
+}
+
+static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident=
+ {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "SBC60xx",
+ };
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if(get_user(new_options, p))
+ return -EFAULT;
+
+ if(new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
+
+ if(new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if(get_user(new_timeout, p))
+ return -EFAULT;
+
+ if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ }
+}
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = fop_write,
+ .open = fop_open,
+ .release = fop_close,
+ .ioctl = fop_ioctl,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * Notifier for system down
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT)
+ wdt_turnoff();
+ return NOTIFY_DONE;
+}
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier=
+{
+ .notifier_call = wdt_notify_sys,
+};
+
+static void __exit sbc60xxwdt_unload(void)
+{
+ wdt_turnoff();
+
+ /* Deregister */
+ misc_deregister(&wdt_miscdev);
+
+ unregister_reboot_notifier(&wdt_notifier);
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ release_region(wdt_stop,1);
+ release_region(wdt_start,1);
+}
+
+static int __init sbc60xxwdt_init(void)
+{
+ int rc = -EBUSY;
+
+ if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
+ {
+ timeout = WATCHDOG_TIMEOUT;
+ printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
+ timeout);
+ }
+
+ if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_start);
+ rc = -EIO;
+ goto err_out;
+ }
+
+ /* We cannot reserve 0x45 - the kernel already has! */
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ {
+ if (!request_region(wdt_stop, 1, "SBC 60XX WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_stop);
+ rc = -EIO;
+ goto err_out_region1;
+ }
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_region2;
+ }
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
+ }
+
+ printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+ return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt_miscdev);
+err_out_region2:
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ release_region(wdt_stop,1);
+err_out_region1:
+ release_region(wdt_start,1);
+err_out:
+ return rc;
+}
+
+module_init(sbc60xxwdt_init);
+module_exit(sbc60xxwdt_unload);
+
+MODULE_AUTHOR("Jakob Oestergaard <jakob@unthought.net>");
+MODULE_DESCRIPTION("60xx Single Board Computer Watchdog Timer driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * SBC8360 Watchdog driver
+ *
+ * (c) Copyright 2005 Webcon, Inc.
+ *
+ * Based on ib700wdt.c, which is based on advantechwdt.c which is based
+ * on acquirewdt.c which is based on wdt.c.
+ *
+ * (c) Copyright 2001 Charles Howes <chowes@vsol.net>
+ *
+ * Based on advantechwdt.c which is based on acquirewdt.c which
+ * is based on wdt.c.
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * Based on acquirewdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ * Added timeout module option to override default
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/notifier.h>
+#include <linux/fs.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/moduleparam.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+static unsigned long sbc8360_is_open;
+static spinlock_t sbc8360_lock;
+static char expect_close;
+
+#define PFX "sbc8360: "
+
+/*
+ *
+ * Watchdog Timer Configuration
+ *
+ * The function of the watchdog timer is to reset the system automatically
+ * and is defined at I/O port 0120H and 0121H. To enable the watchdog timer
+ * and allow the system to reset, write appropriate values from the table
+ * below to I/O port 0120H and 0121H. To disable the timer, write a zero
+ * value to I/O port 0121H for the system to stop the watchdog function.
+ *
+ * The following describes how the timer should be programmed (according to
+ * the vendor documentation)
+ *
+ * Enabling Watchdog:
+ * MOV AX,000AH (enable, phase I)
+ * MOV DX,0120H
+ * OUT DX,AX
+ * MOV AX,000BH (enable, phase II)
+ * MOV DX,0120H
+ * OUT DX,AX
+ * MOV AX,000nH (set multiplier n, from 1-4)
+ * MOV DX,0120H
+ * OUT DX,AX
+ * MOV AX,000mH (set base timer m, from 0-F)
+ * MOV DX,0121H
+ * OUT DX,AX
+ *
+ * Reset timer:
+ * MOV AX,000mH (same as set base timer, above)
+ * MOV DX,0121H
+ * OUT DX,AX
+ *
+ * Disabling Watchdog:
+ * MOV AX,0000H (a zero value)
+ * MOV DX,0120H
+ * OUT DX,AX
+ *
+ * Watchdog timeout configuration values:
+ * N
+ * M | 1 2 3 4
+ * --|----------------------------------
+ * 0 | 0.5s 5s 50s 100s
+ * 1 | 1s 10s 100s 200s
+ * 2 | 1.5s 15s 150s 300s
+ * 3 | 2s 20s 200s 400s
+ * 4 | 2.5s 25s 250s 500s
+ * 5 | 3s 30s 300s 600s
+ * 6 | 3.5s 35s 350s 700s
+ * 7 | 4s 40s 400s 800s
+ * 8 | 4.5s 45s 450s 900s
+ * 9 | 5s 50s 500s 1000s
+ * A | 5.5s 55s 550s 1100s
+ * B | 6s 60s 600s 1200s
+ * C | 6.5s 65s 650s 1300s
+ * D | 7s 70s 700s 1400s
+ * E | 7.5s 75s 750s 1500s
+ * F | 8s 80s 800s 1600s
+ *
+ * Another way to say the same things is:
+ * For N=1, Timeout = (M+1) * 0.5s
+ * For N=2, Timeout = (M+1) * 5s
+ * For N=3, Timeout = (M+1) * 50s
+ * For N=4, Timeout = (M+1) * 100s
+ *
+ */
+
+static int wd_times[64][2] = {
+ {0, 1}, /* 0 = 0.5s */
+ {1, 1}, /* 1 = 1s */
+ {2, 1}, /* 2 = 1.5s */
+ {3, 1}, /* 3 = 2s */
+ {4, 1}, /* 4 = 2.5s */
+ {5, 1}, /* 5 = 3s */
+ {6, 1}, /* 6 = 3.5s */
+ {7, 1}, /* 7 = 4s */
+ {8, 1}, /* 8 = 4.5s */
+ {9, 1}, /* 9 = 5s */
+ {0xA, 1}, /* 10 = 5.5s */
+ {0xB, 1}, /* 11 = 6s */
+ {0xC, 1}, /* 12 = 6.5s */
+ {0xD, 1}, /* 13 = 7s */
+ {0xE, 1}, /* 14 = 7.5s */
+ {0xF, 1}, /* 15 = 8s */
+ {0, 2}, /* 16 = 5s */
+ {1, 2}, /* 17 = 10s */
+ {2, 2}, /* 18 = 15s */
+ {3, 2}, /* 19 = 20s */
+ {4, 2}, /* 20 = 25s */
+ {5, 2}, /* 21 = 30s */
+ {6, 2}, /* 22 = 35s */
+ {7, 2}, /* 23 = 40s */
+ {8, 2}, /* 24 = 45s */
+ {9, 2}, /* 25 = 50s */
+ {0xA, 2}, /* 26 = 55s */
+ {0xB, 2}, /* 27 = 60s */
+ {0xC, 2}, /* 28 = 65s */
+ {0xD, 2}, /* 29 = 70s */
+ {0xE, 2}, /* 30 = 75s */
+ {0xF, 2}, /* 31 = 80s */
+ {0, 3}, /* 32 = 50s */
+ {1, 3}, /* 33 = 100s */
+ {2, 3}, /* 34 = 150s */
+ {3, 3}, /* 35 = 200s */
+ {4, 3}, /* 36 = 250s */
+ {5, 3}, /* 37 = 300s */
+ {6, 3}, /* 38 = 350s */
+ {7, 3}, /* 39 = 400s */
+ {8, 3}, /* 40 = 450s */
+ {9, 3}, /* 41 = 500s */
+ {0xA, 3}, /* 42 = 550s */
+ {0xB, 3}, /* 43 = 600s */
+ {0xC, 3}, /* 44 = 650s */
+ {0xD, 3}, /* 45 = 700s */
+ {0xE, 3}, /* 46 = 750s */
+ {0xF, 3}, /* 47 = 800s */
+ {0, 4}, /* 48 = 100s */
+ {1, 4}, /* 49 = 200s */
+ {2, 4}, /* 50 = 300s */
+ {3, 4}, /* 51 = 400s */
+ {4, 4}, /* 52 = 500s */
+ {5, 4}, /* 53 = 600s */
+ {6, 4}, /* 54 = 700s */
+ {7, 4}, /* 55 = 800s */
+ {8, 4}, /* 56 = 900s */
+ {9, 4}, /* 57 = 1000s */
+ {0xA, 4}, /* 58 = 1100s */
+ {0xB, 4}, /* 59 = 1200s */
+ {0xC, 4}, /* 60 = 1300s */
+ {0xD, 4}, /* 61 = 1400s */
+ {0xE, 4}, /* 62 = 1500s */
+ {0xF, 4} /* 63 = 1600s */
+};
+
+#define SBC8360_ENABLE 0x120
+#define SBC8360_BASETIME 0x121
+
+static int timeout = 27;
+static int wd_margin = 0xB;
+static int wd_multiplier = 2;
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Kernel methods.
+ */
+
+/* Activate and pre-configure watchdog */
+static void sbc8360_activate(void)
+{
+ /* Enable the watchdog */
+ outb(0x0A, SBC8360_ENABLE);
+ msleep_interruptible(100);
+ outb(0x0B, SBC8360_ENABLE);
+ msleep_interruptible(100);
+ /* Set timeout multiplier */
+ outb(wd_multiplier, SBC8360_ENABLE);
+ msleep_interruptible(100);
+ /* Nothing happens until first sbc8360_ping() */
+}
+
+/* Kernel pings watchdog */
+static void sbc8360_ping(void)
+{
+ /* Write the base timer register */
+ outb(wd_margin, SBC8360_BASETIME);
+}
+
+/* Userspace pings kernel driver, or requests clean close */
+static ssize_t sbc8360_write(struct file *file, const char __user * buf,
+ size_t count, loff_t * ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ sbc8360_ping();
+ }
+ return count;
+}
+
+static int sbc8360_open(struct inode *inode, struct file *file)
+{
+ spin_lock(&sbc8360_lock);
+ if (test_and_set_bit(0, &sbc8360_is_open)) {
+ spin_unlock(&sbc8360_lock);
+ return -EBUSY;
+ }
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate and ping once to start the countdown */
+ spin_unlock(&sbc8360_lock);
+ sbc8360_activate();
+ sbc8360_ping();
+ return nonseekable_open(inode, file);
+}
+
+static int sbc8360_close(struct inode *inode, struct file *file)
+{
+ spin_lock(&sbc8360_lock);
+ if (expect_close == 42)
+ outb(0, SBC8360_ENABLE);
+ else
+ printk(KERN_CRIT PFX
+ "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
+
+ clear_bit(0, &sbc8360_is_open);
+ expect_close = 0;
+ spin_unlock(&sbc8360_lock);
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int sbc8360_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Disable the SBC8360 Watchdog */
+ outb(0, SBC8360_ENABLE);
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations sbc8360_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = sbc8360_write,
+ .open = sbc8360_open,
+ .release = sbc8360_close,
+};
+
+static struct miscdevice sbc8360_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &sbc8360_fops,
+};
+
+/*
+ * The SBC8360 needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block sbc8360_notifier = {
+ .notifier_call = sbc8360_notify_sys,
+};
+
+static int __init sbc8360_init(void)
+{
+ int res;
+ unsigned long int mseconds = 60000;
+
+ if (timeout < 0 || timeout > 63) {
+ printk(KERN_ERR PFX "Invalid timeout index (must be 0-63).\n");
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (!request_region(SBC8360_ENABLE, 1, "SBC8360")) {
+ printk(KERN_ERR PFX "ENABLE method I/O %X is not available.\n",
+ SBC8360_ENABLE);
+ res = -EIO;
+ goto out;
+ }
+ if (!request_region(SBC8360_BASETIME, 1, "SBC8360")) {
+ printk(KERN_ERR PFX
+ "BASETIME method I/O %X is not available.\n",
+ SBC8360_BASETIME);
+ res = -EIO;
+ goto out_nobasetimereg;
+ }
+
+ res = register_reboot_notifier(&sbc8360_notifier);
+ if (res) {
+ printk(KERN_ERR PFX "Failed to register reboot notifier.\n");
+ goto out_noreboot;
+ }
+
+ spin_lock_init(&sbc8360_lock);
+ res = misc_register(&sbc8360_miscdev);
+ if (res) {
+ printk(KERN_ERR PFX "failed to register misc device\n");
+ goto out_nomisc;
+ }
+
+ wd_margin = wd_times[timeout][0];
+ wd_multiplier = wd_times[timeout][1];
+
+ if (wd_multiplier == 1)
+ mseconds = (wd_margin + 1) * 500;
+ else if (wd_multiplier == 2)
+ mseconds = (wd_margin + 1) * 5000;
+ else if (wd_multiplier == 3)
+ mseconds = (wd_margin + 1) * 50000;
+ else if (wd_multiplier == 4)
+ mseconds = (wd_margin + 1) * 100000;
+
+ /* My kingdom for the ability to print "0.5 seconds" in the kernel! */
+ printk(KERN_INFO PFX "Timeout set at %ld ms.\n", mseconds);
+
+ return 0;
+
+ out_nomisc:
+ unregister_reboot_notifier(&sbc8360_notifier);
+ out_noreboot:
+ release_region(SBC8360_BASETIME, 1);
+ out_nobasetimereg:
+ release_region(SBC8360_ENABLE, 1);
+ out:
+ return res;
+}
+
+static void __exit sbc8360_exit(void)
+{
+ misc_deregister(&sbc8360_miscdev);
+ unregister_reboot_notifier(&sbc8360_notifier);
+ release_region(SBC8360_ENABLE, 1);
+ release_region(SBC8360_BASETIME, 1);
+}
+
+module_init(sbc8360_init);
+module_exit(sbc8360_exit);
+
+MODULE_AUTHOR("Ian E. Morgan <imorgan@webcon.ca>");
+MODULE_DESCRIPTION("SBC8360 watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.01");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+/* end of sbc8360.c */
--- /dev/null
+/*
+ * SBC EPX C3 0.1 A Hardware Watchdog Device for the Winsystems EPX-C3
+ * single board computer
+ *
+ * (c) Copyright 2006 Calin A. Culianu <calin@ajvar.org>, All Rights
+ * Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * based on softdog.c by Alan Cox <alan@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define PFX "epx_c3: "
+static int epx_c3_alive;
+
+#define WATCHDOG_TIMEOUT 1 /* 1 sec default timeout */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define EPXC3_WATCHDOG_CTL_REG 0x1ee /* write 1 to enable, 0 to disable */
+#define EPXC3_WATCHDOG_PET_REG 0x1ef /* write anything to pet once enabled */
+
+static void epx_c3_start(void)
+{
+ outb(1, EPXC3_WATCHDOG_CTL_REG);
+}
+
+static void epx_c3_stop(void)
+{
+
+ outb(0, EPXC3_WATCHDOG_CTL_REG);
+
+ printk(KERN_INFO PFX "Stopped watchdog timer.\n");
+}
+
+static void epx_c3_pet(void)
+{
+ outb(1, EPXC3_WATCHDOG_PET_REG);
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+static int epx_c3_open(struct inode *inode, struct file *file)
+{
+ if (epx_c3_alive)
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Activate timer */
+ epx_c3_start();
+ epx_c3_pet();
+
+ epx_c3_alive = 1;
+ printk(KERN_INFO "Started watchdog timer.\n");
+
+ return nonseekable_open(inode, file);
+}
+
+static int epx_c3_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer.
+ * Lock it in if it's a module and we defined ...NOWAYOUT */
+ if (!nowayout)
+ epx_c3_stop(); /* Turn the WDT off */
+
+ epx_c3_alive = 0;
+
+ return 0;
+}
+
+static ssize_t epx_c3_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* Refresh the timer. */
+ if (len)
+ epx_c3_pet();
+ return len;
+}
+
+static int epx_c3_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int options, retval = -EINVAL;
+ int __user *argp = (void __user *)arg;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "Winsystems EPX-C3 H/W Watchdog",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, argp);
+ case WDIOC_KEEPALIVE:
+ epx_c3_pet();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(WATCHDOG_TIMEOUT, argp);
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, argp))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ epx_c3_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ epx_c3_start();
+ retval = 0;
+ }
+
+ return retval;
+ default:
+ return -ENOTTY;
+ }
+}
+
+static int epx_c3_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ epx_c3_stop(); /* Turn the WDT off */
+
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations epx_c3_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = epx_c3_write,
+ .ioctl = epx_c3_ioctl,
+ .open = epx_c3_open,
+ .release = epx_c3_release,
+};
+
+static struct miscdevice epx_c3_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &epx_c3_fops,
+};
+
+static struct notifier_block epx_c3_notifier = {
+ .notifier_call = epx_c3_notify_sys,
+};
+
+static const char banner[] __initdata =
+ KERN_INFO PFX "Hardware Watchdog Timer for Winsystems EPX-C3 SBC: 0.1\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ if (!request_region(EPXC3_WATCHDOG_CTL_REG, 2, "epxc3_watchdog"))
+ return -EBUSY;
+
+ ret = register_reboot_notifier(&epx_c3_notifier);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register reboot notifier "
+ "(err=%d)\n", ret);
+ goto out;
+ }
+
+ ret = misc_register(&epx_c3_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d "
+ "(err=%d)\n", WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&epx_c3_notifier);
+ goto out;
+ }
+
+ printk(banner);
+
+ return 0;
+
+out:
+ release_region(EPXC3_WATCHDOG_CTL_REG, 2);
+ return ret;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&epx_c3_miscdev);
+ unregister_reboot_notifier(&epx_c3_notifier);
+ release_region(EPXC3_WATCHDOG_CTL_REG, 2);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Calin A. Culianu <calin@ajvar.org>");
+MODULE_DESCRIPTION("Hardware Watchdog Device for Winsystems EPX-C3 SBC. Note that there is no way to probe for this device -- so only use it if you are *sure* you are runnning on this specific SBC system from Winsystems! It writes to IO ports 0x1ee and 0x1ef!");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * National Semiconductor PC87307/PC97307 (ala SC1200) WDT driver
+ * (c) Copyright 2002 Zwane Mwaikambo <zwane@commfireservices.com>,
+ * All Rights Reserved.
+ * Based on wdt.c and wdt977.c by Alan Cox and Woody Suwalski respectively.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The author(s) of this software shall not be held liable for damages
+ * of any nature resulting due to the use of this software. This
+ * software is provided AS-IS with no warranties.
+ *
+ * Changelog:
+ * 20020220 Zwane Mwaikambo Code based on datasheet, no hardware.
+ * 20020221 Zwane Mwaikambo Cleanups as suggested by Jeff Garzik and Alan Cox.
+ * 20020222 Zwane Mwaikambo Added probing.
+ * 20020225 Zwane Mwaikambo Added ISAPNP support.
+ * 20020412 Rob Radez Broke out start/stop functions
+ * <rob@osinvestor.com> Return proper status instead of temperature warning
+ * Add WDIOC_GETBOOTSTATUS and WDIOC_SETOPTIONS ioctls
+ * Fix CONFIG_WATCHDOG_NOWAYOUT
+ * 20020530 Joel Becker Add Matt Domsch's nowayout module option
+ * 20030116 Adam Belay Updated to the latest pnp code
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/spinlock.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pnp.h>
+#include <linux/fs.h>
+
+#include <asm/semaphore.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define SC1200_MODULE_VER "build 20020303"
+#define SC1200_MODULE_NAME "sc1200wdt"
+#define PFX SC1200_MODULE_NAME ": "
+
+#define MAX_TIMEOUT 255 /* 255 minutes */
+#define PMIR (io) /* Power Management Index Register */
+#define PMDR (io+1) /* Power Management Data Register */
+
+/* Data Register indexes */
+#define FER1 0x00 /* Function enable register 1 */
+#define FER2 0x01 /* Function enable register 2 */
+#define PMC1 0x02 /* Power Management Ctrl 1 */
+#define PMC2 0x03 /* Power Management Ctrl 2 */
+#define PMC3 0x04 /* Power Management Ctrl 3 */
+#define WDTO 0x05 /* Watchdog timeout register */
+#define WDCF 0x06 /* Watchdog config register */
+#define WDST 0x07 /* Watchdog status register */
+
+/* WDCF bitfields - which devices assert WDO */
+#define KBC_IRQ 0x01 /* Keyboard Controller */
+#define MSE_IRQ 0x02 /* Mouse */
+#define UART1_IRQ 0x03 /* Serial0 */
+#define UART2_IRQ 0x04 /* Serial1 */
+/* 5 -7 are reserved */
+
+static char banner[] __initdata = KERN_INFO PFX SC1200_MODULE_VER;
+static int timeout = 1;
+static int io = -1;
+static int io_len = 2; /* for non plug and play */
+static struct semaphore open_sem;
+static char expect_close;
+static spinlock_t sc1200wdt_lock; /* io port access serialisation */
+
+#if defined CONFIG_PNP
+static int isapnp = 1;
+static struct pnp_dev *wdt_dev;
+
+module_param(isapnp, int, 0);
+MODULE_PARM_DESC(isapnp, "When set to 0 driver ISA PnP support will be disabled");
+#endif
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "io port");
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "range is 0-255 minutes, default is 1");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+
+
+/* Read from Data Register */
+static inline void sc1200wdt_read_data(unsigned char index, unsigned char *data)
+{
+ spin_lock(&sc1200wdt_lock);
+ outb_p(index, PMIR);
+ *data = inb(PMDR);
+ spin_unlock(&sc1200wdt_lock);
+}
+
+
+/* Write to Data Register */
+static inline void sc1200wdt_write_data(unsigned char index, unsigned char data)
+{
+ spin_lock(&sc1200wdt_lock);
+ outb_p(index, PMIR);
+ outb(data, PMDR);
+ spin_unlock(&sc1200wdt_lock);
+}
+
+
+static void sc1200wdt_start(void)
+{
+ unsigned char reg;
+
+ sc1200wdt_read_data(WDCF, ®);
+ /* assert WDO when any of the following interrupts are triggered too */
+ reg |= (KBC_IRQ | MSE_IRQ | UART1_IRQ | UART2_IRQ);
+ sc1200wdt_write_data(WDCF, reg);
+ /* set the timeout and get the ball rolling */
+ sc1200wdt_write_data(WDTO, timeout);
+}
+
+
+static void sc1200wdt_stop(void)
+{
+ sc1200wdt_write_data(WDTO, 0);
+}
+
+
+/* This returns the status of the WDO signal, inactive high. */
+static inline int sc1200wdt_status(void)
+{
+ unsigned char ret;
+
+ sc1200wdt_read_data(WDST, &ret);
+ /* If the bit is inactive, the watchdog is enabled, so return
+ * KEEPALIVEPING which is a bit of a kludge because there's nothing
+ * else for enabled/disabled status
+ */
+ return (ret & 0x01) ? 0 : WDIOF_KEEPALIVEPING; /* bits 1 - 7 are undefined */
+}
+
+
+static int sc1200wdt_open(struct inode *inode, struct file *file)
+{
+ /* allow one at a time */
+ if (down_trylock(&open_sem))
+ return -EBUSY;
+
+ if (timeout > MAX_TIMEOUT)
+ timeout = MAX_TIMEOUT;
+
+ sc1200wdt_start();
+ printk(KERN_INFO PFX "Watchdog enabled, timeout = %d min(s)", timeout);
+
+ return nonseekable_open(inode, file);
+}
+
+
+static int sc1200wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "PC87307/PC97307",
+ };
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof ident))
+ return -EFAULT;
+ return 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(sc1200wdt_status(), p);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ sc1200wdt_write_data(WDTO, timeout);
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+
+ /* the API states this is given in secs */
+ new_timeout /= 60;
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ sc1200wdt_write_data(WDTO, timeout);
+ /* fall through and return the new timeout */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout * 60, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ sc1200wdt_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ sc1200wdt_start();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+
+static int sc1200wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ sc1200wdt_stop();
+ printk(KERN_INFO PFX "Watchdog disabled\n");
+ } else {
+ sc1200wdt_write_data(WDTO, timeout);
+ printk(KERN_CRIT PFX "Unexpected close!, timeout = %d min(s)\n", timeout);
+ }
+ up(&open_sem);
+ expect_close = 0;
+
+ return 0;
+}
+
+
+static ssize_t sc1200wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+{
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ sc1200wdt_write_data(WDTO, timeout);
+ return len;
+ }
+
+ return 0;
+}
+
+
+static int sc1200wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ sc1200wdt_stop();
+
+ return NOTIFY_DONE;
+}
+
+
+static struct notifier_block sc1200wdt_notifier =
+{
+ .notifier_call = sc1200wdt_notify_sys,
+};
+
+static const struct file_operations sc1200wdt_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = sc1200wdt_write,
+ .ioctl = sc1200wdt_ioctl,
+ .open = sc1200wdt_open,
+ .release = sc1200wdt_release,
+};
+
+static struct miscdevice sc1200wdt_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &sc1200wdt_fops,
+};
+
+
+static int __init sc1200wdt_probe(void)
+{
+ /* The probe works by reading the PMC3 register's default value of 0x0e
+ * there is one caveat, if the device disables the parallel port or any
+ * of the UARTs we won't be able to detect it.
+ * Nb. This could be done with accuracy by reading the SID registers, but
+ * we don't have access to those io regions.
+ */
+
+ unsigned char reg;
+
+ sc1200wdt_read_data(PMC3, ®);
+ reg &= 0x0f; /* we don't want the UART busy bits */
+ return (reg == 0x0e) ? 0 : -ENODEV;
+}
+
+
+#if defined CONFIG_PNP
+
+static struct pnp_device_id scl200wdt_pnp_devices[] = {
+ /* National Semiconductor PC87307/PC97307 watchdog component */
+ {.id = "NSC0800", .driver_data = 0},
+ {.id = ""},
+};
+
+static int scl200wdt_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
+{
+ /* this driver only supports one card at a time */
+ if (wdt_dev || !isapnp)
+ return -EBUSY;
+
+ wdt_dev = dev;
+ io = pnp_port_start(wdt_dev, 0);
+ io_len = pnp_port_len(wdt_dev, 0);
+
+ if (!request_region(io, io_len, SC1200_MODULE_NAME)) {
+ printk(KERN_ERR PFX "Unable to register IO port %#x\n", io);
+ return -EBUSY;
+ }
+
+ printk(KERN_INFO "scl200wdt: PnP device found at io port %#x/%d\n", io, io_len);
+ return 0;
+}
+
+static void scl200wdt_pnp_remove(struct pnp_dev * dev)
+{
+ if (wdt_dev){
+ release_region(io, io_len);
+ wdt_dev = NULL;
+ }
+}
+
+static struct pnp_driver scl200wdt_pnp_driver = {
+ .name = "scl200wdt",
+ .id_table = scl200wdt_pnp_devices,
+ .probe = scl200wdt_pnp_probe,
+ .remove = scl200wdt_pnp_remove,
+};
+
+#endif /* CONFIG_PNP */
+
+
+static int __init sc1200wdt_init(void)
+{
+ int ret;
+
+ printk("%s\n", banner);
+
+ spin_lock_init(&sc1200wdt_lock);
+ sema_init(&open_sem, 1);
+
+#if defined CONFIG_PNP
+ if (isapnp) {
+ ret = pnp_register_driver(&scl200wdt_pnp_driver);
+ if (ret)
+ goto out_clean;
+ }
+#endif
+
+ if (io == -1) {
+ printk(KERN_ERR PFX "io parameter must be specified\n");
+ ret = -EINVAL;
+ goto out_pnp;
+ }
+
+#if defined CONFIG_PNP
+ /* now that the user has specified an IO port and we haven't detected
+ * any devices, disable pnp support */
+ isapnp = 0;
+ pnp_unregister_driver(&scl200wdt_pnp_driver);
+#endif
+
+ if (!request_region(io, io_len, SC1200_MODULE_NAME)) {
+ printk(KERN_ERR PFX "Unable to register IO port %#x\n", io);
+ ret = -EBUSY;
+ goto out_pnp;
+ }
+
+ ret = sc1200wdt_probe();
+ if (ret)
+ goto out_io;
+
+ ret = register_reboot_notifier(&sc1200wdt_notifier);
+ if (ret) {
+ printk(KERN_ERR PFX "Unable to register reboot notifier err = %d\n", ret);
+ goto out_io;
+ }
+
+ ret = misc_register(&sc1200wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR PFX "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
+ goto out_rbt;
+ }
+
+ /* ret = 0 */
+
+out_clean:
+ return ret;
+
+out_rbt:
+ unregister_reboot_notifier(&sc1200wdt_notifier);
+
+out_io:
+ release_region(io, io_len);
+
+out_pnp:
+#if defined CONFIG_PNP
+ if (isapnp)
+ pnp_unregister_driver(&scl200wdt_pnp_driver);
+#endif
+ goto out_clean;
+}
+
+
+static void __exit sc1200wdt_exit(void)
+{
+ misc_deregister(&sc1200wdt_miscdev);
+ unregister_reboot_notifier(&sc1200wdt_notifier);
+
+#if defined CONFIG_PNP
+ if(isapnp)
+ pnp_unregister_driver(&scl200wdt_pnp_driver);
+ else
+#endif
+ release_region(io, io_len);
+}
+
+module_init(sc1200wdt_init);
+module_exit(sc1200wdt_exit);
+
+MODULE_AUTHOR("Zwane Mwaikambo <zwane@commfireservices.com>");
+MODULE_DESCRIPTION("Driver for National Semiconductor PC87307/PC97307 watchdog component");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * AMD Elan SC520 processor Watchdog Timer driver
+ *
+ * Based on acquirewdt.c by Alan Cox,
+ * and sbc60xxwdt.c by Jakob Oestergaard <jakob@unthought.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The authors do NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (c) Copyright 2001 Scott Jennings <linuxdrivers@oro.net>
+ * 9/27 - 2001 [Initial release]
+ *
+ * Additional fixes Alan Cox
+ * - Fixed formatting
+ * - Removed debug printks
+ * - Fixed SMP built kernel deadlock
+ * - Switched to private locks not lock_kernel
+ * - Used ioremap/writew/readw
+ * - Added NOWAYOUT support
+ * 4/12 - 2002 Changes by Rob Radez <rob@osinvestor.com>
+ * - Change comments
+ * - Eliminate fop_llseek
+ * - Change CONFIG_WATCHDOG_NOWAYOUT semantics
+ * - Add KERN_* tags to printks
+ * - fix possible wdt_is_open race
+ * - Report proper capabilities in watchdog_info
+ * - Add WDIOC_{GETSTATUS, GETBOOTSTATUS, SETTIMEOUT,
+ * GETTIMEOUT, SETOPTIONS} ioctls
+ * 09/8 - 2003 Changes by Wim Van Sebroeck <wim@iguana.be>
+ * - cleanup of trailing spaces
+ * - added extra printk's for startup problems
+ * - use module_param
+ * - made timeout (the emulated heartbeat) a module_param
+ * - made the keepalive ping an internal subroutine
+ * 3/27 - 2004 Changes by Sean Young <sean@mess.org>
+ * - set MMCR_BASE to 0xfffef000
+ * - CBAR does not need to be read
+ * - removed debugging printks
+ *
+ * This WDT driver is different from most other Linux WDT
+ * drivers in that the driver will ping the watchdog by itself,
+ * because this particular WDT has a very short timeout (1.6
+ * seconds) and it would be insane to count on any userspace
+ * daemon always getting scheduled within that time frame.
+ *
+ * This driver uses memory mapped IO, and spinlock.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define OUR_NAME "sc520_wdt"
+#define PFX OUR_NAME ": "
+
+/*
+ * The AMD Elan SC520 timeout value is 492us times a power of 2 (0-7)
+ *
+ * 0: 492us 2: 1.01s 4: 4.03s 6: 16.22s
+ * 1: 503ms 3: 2.01s 5: 8.05s 7: 32.21s
+ *
+ * We will program the SC520 watchdog for a timeout of 2.01s.
+ * If we reset the watchdog every ~250ms we should be safe.
+ */
+
+#define WDT_INTERVAL (HZ/4+1)
+
+/*
+ * We must not require too good response from the userspace daemon.
+ * Here we require the userspace daemon to send us a heartbeat
+ * char to /dev/watchdog every 30 seconds.
+ */
+
+#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * AMD Elan SC520 - Watchdog Timer Registers
+ */
+#define MMCR_BASE 0xfffef000 /* The default base address */
+#define OFFS_WDTMRCTL 0xCB0 /* Watchdog Timer Control Register */
+
+/* WDT Control Register bit definitions */
+#define WDT_EXP_SEL_01 0x0001 /* [01] Time-out = 496 us (with 33 Mhz clk). */
+#define WDT_EXP_SEL_02 0x0002 /* [02] Time-out = 508 ms (with 33 Mhz clk). */
+#define WDT_EXP_SEL_03 0x0004 /* [03] Time-out = 1.02 s (with 33 Mhz clk). */
+#define WDT_EXP_SEL_04 0x0008 /* [04] Time-out = 2.03 s (with 33 Mhz clk). */
+#define WDT_EXP_SEL_05 0x0010 /* [05] Time-out = 4.07 s (with 33 Mhz clk). */
+#define WDT_EXP_SEL_06 0x0020 /* [06] Time-out = 8.13 s (with 33 Mhz clk). */
+#define WDT_EXP_SEL_07 0x0040 /* [07] Time-out = 16.27s (with 33 Mhz clk). */
+#define WDT_EXP_SEL_08 0x0080 /* [08] Time-out = 32.54s (with 33 Mhz clk). */
+#define WDT_IRQ_FLG 0x1000 /* [12] Interrupt Request Flag */
+#define WDT_WRST_ENB 0x4000 /* [14] Watchdog Timer Reset Enable */
+#define WDT_ENB 0x8000 /* [15] Watchdog Timer Enable */
+
+static __u16 __iomem *wdtmrctl;
+
+static void wdt_timer_ping(unsigned long);
+static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
+static unsigned long next_heartbeat;
+static unsigned long wdt_is_open;
+static char wdt_expect_close;
+static spinlock_t wdt_spinlock;
+
+/*
+ * Whack the dog
+ */
+
+static void wdt_timer_ping(unsigned long data)
+{
+ /* If we got a heartbeat pulse within the WDT_US_INTERVAL
+ * we agree to ping the WDT
+ */
+ if(time_before(jiffies, next_heartbeat))
+ {
+ /* Ping the WDT */
+ spin_lock(&wdt_spinlock);
+ writew(0xAAAA, wdtmrctl);
+ writew(0x5555, wdtmrctl);
+ spin_unlock(&wdt_spinlock);
+
+ /* Re-set the timer interval */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+ } else {
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ }
+}
+
+/*
+ * Utility routines
+ */
+
+static void wdt_config(int writeval)
+{
+ __u16 dummy;
+ unsigned long flags;
+
+ /* buy some time (ping) */
+ spin_lock_irqsave(&wdt_spinlock, flags);
+ dummy=readw(wdtmrctl); /* ensure write synchronization */
+ writew(0xAAAA, wdtmrctl);
+ writew(0x5555, wdtmrctl);
+ /* unlock WDT = make WDT configuration register writable one time */
+ writew(0x3333, wdtmrctl);
+ writew(0xCCCC, wdtmrctl);
+ /* write WDT configuration register */
+ writew(writeval, wdtmrctl);
+ spin_unlock_irqrestore(&wdt_spinlock, flags);
+}
+
+static int wdt_startup(void)
+{
+ next_heartbeat = jiffies + (timeout * HZ);
+
+ /* Start the timer */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+
+ /* Start the watchdog */
+ wdt_config(WDT_ENB | WDT_WRST_ENB | WDT_EXP_SEL_04);
+
+ printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
+ return 0;
+}
+
+static int wdt_turnoff(void)
+{
+ /* Stop the timer */
+ del_timer(&timer);
+
+ /* Stop the watchdog */
+ wdt_config(0);
+
+ printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
+ return 0;
+}
+
+static int wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+ return 0;
+}
+
+static int wdt_set_heartbeat(int t)
+{
+ if ((t < 1) || (t > 3600)) /* arbitrary upper limit */
+ return -EINVAL;
+
+ timeout = t;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count) {
+ if (!nowayout) {
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ wdt_expect_close = 0;
+
+ /* now scan */
+ for(ofs = 0; ofs != count; ofs++) {
+ char c;
+ if (get_user(c, buf + ofs))
+ return -EFAULT;
+ if(c == 'V')
+ wdt_expect_close = 42;
+ }
+ }
+
+ /* Well, anyhow someone wrote to us, we should return that favour */
+ wdt_keepalive();
+ }
+ return count;
+}
+
+static int fop_open(struct inode * inode, struct file * file)
+{
+ /* Just in case we're already talking to someone... */
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Good, fire up the show */
+ wdt_startup();
+ return nonseekable_open(inode, file);
+}
+
+static int fop_close(struct inode * inode, struct file * file)
+{
+ if(wdt_expect_close == 42) {
+ wdt_turnoff();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ wdt_keepalive();
+ }
+ clear_bit(0, &wdt_is_open);
+ wdt_expect_close = 0;
+ return 0;
+}
+
+static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "SC520",
+ };
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if(get_user(new_options, p))
+ return -EFAULT;
+
+ if(new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
+
+ if(new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if(get_user(new_timeout, p))
+ return -EFAULT;
+
+ if(wdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ }
+}
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = fop_write,
+ .open = fop_open,
+ .release = fop_close,
+ .ioctl = fop_ioctl,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * Notifier for system down
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT)
+ wdt_turnoff();
+ return NOTIFY_DONE;
+}
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+static void __exit sc520_wdt_unload(void)
+{
+ if (!nowayout)
+ wdt_turnoff();
+
+ /* Deregister */
+ misc_deregister(&wdt_miscdev);
+ unregister_reboot_notifier(&wdt_notifier);
+ iounmap(wdtmrctl);
+}
+
+static int __init sc520_wdt_init(void)
+{
+ int rc = -EBUSY;
+
+ spin_lock_init(&wdt_spinlock);
+
+ /* Check that the timeout value is within it's range ; if not reset to the default */
+ if (wdt_set_heartbeat(timeout)) {
+ wdt_set_heartbeat(WATCHDOG_TIMEOUT);
+ printk(KERN_INFO PFX "timeout value must be 1<=timeout<=3600, using %d\n",
+ WATCHDOG_TIMEOUT);
+ }
+
+ wdtmrctl = ioremap((unsigned long)(MMCR_BASE + OFFS_WDTMRCTL), 2);
+ if (!wdtmrctl) {
+ printk(KERN_ERR PFX "Unable to remap memory\n");
+ rc = -ENOMEM;
+ goto err_out_region2;
+ }
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc) {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_ioremap;
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc) {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, rc);
+ goto err_out_notifier;
+ }
+
+ printk(KERN_INFO PFX "WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout,nowayout);
+
+ return 0;
+
+err_out_notifier:
+ unregister_reboot_notifier(&wdt_notifier);
+err_out_ioremap:
+ iounmap(wdtmrctl);
+err_out_region2:
+ return rc;
+}
+
+module_init(sc520_wdt_init);
+module_exit(sc520_wdt_unload);
+
+MODULE_AUTHOR("Scott and Bill Jennings");
+MODULE_DESCRIPTION("Driver for watchdog timer in AMD \"Elan\" SC520 uProcessor");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/* drivers/char/watchdog/scx200_wdt.c
+
+ National Semiconductor SCx200 Watchdog support
+
+ Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
+
+ Some code taken from:
+ National Semiconductor PC87307/PC97307 (ala SC1200) WDT driver
+ (c) Copyright 2002 Zwane Mwaikambo <zwane@commfireservices.com>
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The author(s) of this software shall not be held liable for damages
+ of any nature resulting due to the use of this software. This
+ software is provided AS-IS with no warranties. */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/scx200.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define NAME "scx200_wdt"
+
+MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
+MODULE_DESCRIPTION("NatSemi SCx200 Watchdog Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+static int margin = 60; /* in seconds */
+module_param(margin, int, 0);
+MODULE_PARM_DESC(margin, "Watchdog margin in seconds");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
+
+static u16 wdto_restart;
+static struct semaphore open_semaphore;
+static char expect_close;
+
+/* Bits of the WDCNFG register */
+#define W_ENABLE 0x00fa /* Enable watchdog */
+#define W_DISABLE 0x0000 /* Disable watchdog */
+
+/* The scaling factor for the timer, this depends on the value of W_ENABLE */
+#define W_SCALE (32768/1024)
+
+static void scx200_wdt_ping(void)
+{
+ outw(wdto_restart, scx200_cb_base + SCx200_WDT_WDTO);
+}
+
+static void scx200_wdt_update_margin(void)
+{
+ printk(KERN_INFO NAME ": timer margin %d seconds\n", margin);
+ wdto_restart = margin * W_SCALE;
+}
+
+static void scx200_wdt_enable(void)
+{
+ printk(KERN_DEBUG NAME ": enabling watchdog timer, wdto_restart = %d\n",
+ wdto_restart);
+
+ outw(0, scx200_cb_base + SCx200_WDT_WDTO);
+ outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
+ outw(W_ENABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
+
+ scx200_wdt_ping();
+}
+
+static void scx200_wdt_disable(void)
+{
+ printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
+
+ outw(0, scx200_cb_base + SCx200_WDT_WDTO);
+ outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
+ outw(W_DISABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
+}
+
+static int scx200_wdt_open(struct inode *inode, struct file *file)
+{
+ /* only allow one at a time */
+ if (down_trylock(&open_semaphore))
+ return -EBUSY;
+ scx200_wdt_enable();
+
+ return nonseekable_open(inode, file);
+}
+
+static int scx200_wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close != 42) {
+ printk(KERN_WARNING NAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
+ } else if (!nowayout) {
+ scx200_wdt_disable();
+ }
+ expect_close = 0;
+ up(&open_semaphore);
+
+ return 0;
+}
+
+static int scx200_wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
+{
+ if (code == SYS_HALT || code == SYS_POWER_OFF)
+ if (!nowayout)
+ scx200_wdt_disable();
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block scx200_wdt_notifier =
+{
+ .notifier_call = scx200_wdt_notify_sys,
+};
+
+static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* check for a magic close character */
+ if (len)
+ {
+ size_t i;
+
+ scx200_wdt_ping();
+
+ expect_close = 0;
+ for (i = 0; i < len; ++i) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+
+ return len;
+ }
+
+ return 0;
+}
+
+static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .identity = "NatSemi SCx200 Watchdog",
+ .firmware_version = 1,
+ .options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
+ };
+ int new_margin;
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ if(copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ if (put_user(0, p))
+ return -EFAULT;
+ return 0;
+ case WDIOC_KEEPALIVE:
+ scx200_wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (new_margin < 1)
+ return -EINVAL;
+ margin = new_margin;
+ scx200_wdt_update_margin();
+ scx200_wdt_ping();
+ case WDIOC_GETTIMEOUT:
+ if (put_user(margin, p))
+ return -EFAULT;
+ return 0;
+ }
+}
+
+static const struct file_operations scx200_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = scx200_wdt_write,
+ .ioctl = scx200_wdt_ioctl,
+ .open = scx200_wdt_open,
+ .release = scx200_wdt_release,
+};
+
+static struct miscdevice scx200_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &scx200_wdt_fops,
+};
+
+static int __init scx200_wdt_init(void)
+{
+ int r;
+
+ printk(KERN_DEBUG NAME ": NatSemi SCx200 Watchdog Driver\n");
+
+ /* check that we have found the configuration block */
+ if (!scx200_cb_present())
+ return -ENODEV;
+
+ if (!request_region(scx200_cb_base + SCx200_WDT_OFFSET,
+ SCx200_WDT_SIZE,
+ "NatSemi SCx200 Watchdog")) {
+ printk(KERN_WARNING NAME ": watchdog I/O region busy\n");
+ return -EBUSY;
+ }
+
+ scx200_wdt_update_margin();
+ scx200_wdt_disable();
+
+ sema_init(&open_semaphore, 1);
+
+ r = misc_register(&scx200_wdt_miscdev);
+ if (r) {
+ release_region(scx200_cb_base + SCx200_WDT_OFFSET,
+ SCx200_WDT_SIZE);
+ return r;
+ }
+
+ r = register_reboot_notifier(&scx200_wdt_notifier);
+ if (r) {
+ printk(KERN_ERR NAME ": unable to register reboot notifier");
+ misc_deregister(&scx200_wdt_miscdev);
+ release_region(scx200_cb_base + SCx200_WDT_OFFSET,
+ SCx200_WDT_SIZE);
+ return r;
+ }
+
+ return 0;
+}
+
+static void __exit scx200_wdt_cleanup(void)
+{
+ unregister_reboot_notifier(&scx200_wdt_notifier);
+ misc_deregister(&scx200_wdt_miscdev);
+ release_region(scx200_cb_base + SCx200_WDT_OFFSET,
+ SCx200_WDT_SIZE);
+}
+
+module_init(scx200_wdt_init);
+module_exit(scx200_wdt_cleanup);
+
+/*
+ Local variables:
+ compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
+ c-basic-offset: 8
+ End:
+*/
--- /dev/null
+/*
+ * drivers/char/watchdog/shwdt.c
+ *
+ * Watchdog driver for integrated watchdog in the SuperH processors.
+ *
+ * Copyright (C) 2001, 2002, 2003 Paul Mundt <lethal@linux-sh.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ *
+ * 19-Apr-2002 Rob Radez <rob@osinvestor.com>
+ * Added expect close support, made emulated timeout runtime changeable
+ * general cleanups, add some ioctls
+ */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/notifier.h>
+#include <linux/ioport.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/watchdog.h>
+
+#define PFX "shwdt: "
+
+/*
+ * Default clock division ratio is 5.25 msecs. For an additional table of
+ * values, consult the asm-sh/watchdog.h. Overload this at module load
+ * time.
+ *
+ * In order for this to work reliably we need to have HZ set to 1000 or
+ * something quite higher than 100 (or we need a proper high-res timer
+ * implementation that will deal with this properly), otherwise the 10ms
+ * resolution of a jiffy is enough to trigger the overflow. For things like
+ * the SH-4 and SH-5, this isn't necessarily that big of a problem, though
+ * for the SH-2 and SH-3, this isn't recommended unless the WDT is absolutely
+ * necssary.
+ *
+ * As a result of this timing problem, the only modes that are particularly
+ * feasible are the 4096 and the 2048 divisors, which yeild 5.25 and 2.62ms
+ * overflow periods respectively.
+ *
+ * Also, since we can't really expect userspace to be responsive enough
+ * before the overflow happens, we maintain two seperate timers .. One in
+ * the kernel for clearing out WOVF every 2ms or so (again, this depends on
+ * HZ == 1000), and another for monitoring userspace writes to the WDT device.
+ *
+ * As such, we currently use a configurable heartbeat interval which defaults
+ * to 30s. In this case, the userspace daemon is only responsible for periodic
+ * writes to the device before the next heartbeat is scheduled. If the daemon
+ * misses its deadline, the kernel timer will allow the WDT to overflow.
+ */
+static int clock_division_ratio = WTCSR_CKS_4096;
+
+#define next_ping_period(cks) msecs_to_jiffies(cks - 4)
+
+static void sh_wdt_ping(unsigned long data);
+
+static unsigned long shwdt_is_open;
+static struct watchdog_info sh_wdt_info;
+static char shwdt_expect_close;
+static DEFINE_TIMER(timer, sh_wdt_ping, 0, 0);
+static unsigned long next_heartbeat;
+
+#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
+static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+/**
+ * sh_wdt_start - Start the Watchdog
+ *
+ * Starts the watchdog.
+ */
+static void sh_wdt_start(void)
+{
+ __u8 csr;
+
+ next_heartbeat = jiffies + (heartbeat * HZ);
+ mod_timer(&timer, next_ping_period(clock_division_ratio));
+
+ csr = sh_wdt_read_csr();
+ csr |= WTCSR_WT | clock_division_ratio;
+ sh_wdt_write_csr(csr);
+
+ sh_wdt_write_cnt(0);
+
+ /*
+ * These processors have a bit of an inconsistent initialization
+ * process.. starting with SH-3, RSTS was moved to WTCSR, and the
+ * RSTCSR register was removed.
+ *
+ * On the SH-2 however, in addition with bits being in different
+ * locations, we must deal with RSTCSR outright..
+ */
+ csr = sh_wdt_read_csr();
+ csr |= WTCSR_TME;
+ csr &= ~WTCSR_RSTS;
+ sh_wdt_write_csr(csr);
+
+#ifdef CONFIG_CPU_SH2
+ /*
+ * Whoever came up with the RSTCSR semantics must've been smoking
+ * some of the good stuff, since in addition to the WTCSR/WTCNT write
+ * brain-damage, it's managed to fuck things up one step further..
+ *
+ * If we need to clear the WOVF bit, the upper byte has to be 0xa5..
+ * but if we want to touch RSTE or RSTS, the upper byte has to be
+ * 0x5a..
+ */
+ csr = sh_wdt_read_rstcsr();
+ csr &= ~RSTCSR_RSTS;
+ sh_wdt_write_rstcsr(csr);
+#endif
+}
+
+/**
+ * sh_wdt_stop - Stop the Watchdog
+ * Stops the watchdog.
+ */
+static void sh_wdt_stop(void)
+{
+ __u8 csr;
+
+ del_timer(&timer);
+
+ csr = sh_wdt_read_csr();
+ csr &= ~WTCSR_TME;
+ sh_wdt_write_csr(csr);
+}
+
+/**
+ * sh_wdt_keepalive - Keep the Userspace Watchdog Alive
+ * The Userspace watchdog got a KeepAlive: schedule the next heartbeat.
+ */
+static inline void sh_wdt_keepalive(void)
+{
+ next_heartbeat = jiffies + (heartbeat * HZ);
+}
+
+/**
+ * sh_wdt_set_heartbeat - Set the Userspace Watchdog heartbeat
+ * Set the Userspace Watchdog heartbeat
+ */
+static int sh_wdt_set_heartbeat(int t)
+{
+ if (unlikely((t < 1) || (t > 3600))) /* arbitrary upper limit */
+ return -EINVAL;
+
+ heartbeat = t;
+ return 0;
+}
+
+/**
+ * sh_wdt_ping - Ping the Watchdog
+ * @data: Unused
+ *
+ * Clears overflow bit, resets timer counter.
+ */
+static void sh_wdt_ping(unsigned long data)
+{
+ if (time_before(jiffies, next_heartbeat)) {
+ __u8 csr;
+
+ csr = sh_wdt_read_csr();
+ csr &= ~WTCSR_IOVF;
+ sh_wdt_write_csr(csr);
+
+ sh_wdt_write_cnt(0);
+
+ mod_timer(&timer, next_ping_period(clock_division_ratio));
+ } else
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping "
+ "the watchdog\n");
+}
+
+/**
+ * sh_wdt_open - Open the Device
+ * @inode: inode of device
+ * @file: file handle of device
+ *
+ * Watchdog device is opened and started.
+ */
+static int sh_wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &shwdt_is_open))
+ return -EBUSY;
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ sh_wdt_start();
+
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * sh_wdt_close - Close the Device
+ * @inode: inode of device
+ * @file: file handle of device
+ *
+ * Watchdog device is closed and stopped.
+ */
+static int sh_wdt_close(struct inode *inode, struct file *file)
+{
+ if (shwdt_expect_close == 42) {
+ sh_wdt_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not "
+ "stopping watchdog!\n");
+ sh_wdt_keepalive();
+ }
+
+ clear_bit(0, &shwdt_is_open);
+ shwdt_expect_close = 0;
+
+ return 0;
+}
+
+/**
+ * sh_wdt_write - Write to Device
+ * @file: file handle of device
+ * @buf: buffer to write
+ * @count: length of buffer
+ * @ppos: offset
+ *
+ * Pings the watchdog on write.
+ */
+static ssize_t sh_wdt_write(struct file *file, const char *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ shwdt_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ shwdt_expect_close = 42;
+ }
+ }
+ sh_wdt_keepalive();
+ }
+
+ return count;
+}
+
+/**
+ * sh_wdt_mmap - map WDT/CPG registers into userspace
+ * @file: file structure for the device
+ * @vma: VMA to map the registers into
+ *
+ * A simple mmap() implementation for the corner cases where the counter
+ * needs to be mapped in userspace directly. Due to the relatively small
+ * size of the area, neighbouring registers not necessarily tied to the
+ * CPG will also be accessible through the register page, so this remains
+ * configurable for users that really know what they're doing.
+ *
+ * Additionaly, the register page maps in the CPG register base relative
+ * to the nearest page-aligned boundary, which requires that userspace do
+ * the appropriate CPU subtype math for calculating the page offset for
+ * the counter value.
+ */
+static int sh_wdt_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int ret = -ENOSYS;
+
+#ifdef CONFIG_SH_WDT_MMAP
+ unsigned long addr;
+
+ /* Only support the simple cases where we map in a register page. */
+ if (((vma->vm_end - vma->vm_start) != PAGE_SIZE) || vma->vm_pgoff)
+ return -EINVAL;
+
+ /*
+ * Pick WTCNT as the start, it's usually the first register after the
+ * FRQCR, and neither one are generally page-aligned out of the box.
+ */
+ addr = WTCNT & ~(PAGE_SIZE - 1);
+
+ vma->vm_flags |= VM_IO;
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ if (io_remap_pfn_range(vma, vma->vm_start, addr >> PAGE_SHIFT,
+ PAGE_SIZE, vma->vm_page_prot)) {
+ printk(KERN_ERR PFX "%s: io_remap_pfn_range failed\n",
+ __FUNCTION__);
+ return -EAGAIN;
+ }
+
+ ret = 0;
+#endif
+
+ return ret;
+}
+
+/**
+ * sh_wdt_ioctl - Query Device
+ * @inode: inode of device
+ * @file: file handle of device
+ * @cmd: watchdog command
+ * @arg: argument
+ *
+ * Query basic information from the device or ping it, as outlined by the
+ * watchdog API.
+ */
+static int sh_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_heartbeat;
+ int options, retval = -EINVAL;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user((struct watchdog_info *)arg,
+ &sh_wdt_info,
+ sizeof(sh_wdt_info)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int *)arg);
+ case WDIOC_KEEPALIVE:
+ sh_wdt_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, (int *)arg))
+ return -EFAULT;
+
+ if (sh_wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ sh_wdt_keepalive();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, (int *)arg);
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ sh_wdt_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ sh_wdt_start();
+ retval = 0;
+ }
+
+ return retval;
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+/**
+ * sh_wdt_notify_sys - Notifier Handler
+ * @this: notifier block
+ * @code: notifier event
+ * @unused: unused
+ *
+ * Handles specific events, such as turning off the watchdog during a
+ * shutdown event.
+ */
+static int sh_wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ sh_wdt_stop();
+
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations sh_wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = sh_wdt_write,
+ .ioctl = sh_wdt_ioctl,
+ .open = sh_wdt_open,
+ .release = sh_wdt_close,
+ .mmap = sh_wdt_mmap,
+};
+
+static struct watchdog_info sh_wdt_info = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "SH WDT",
+};
+
+static struct notifier_block sh_wdt_notifier = {
+ .notifier_call = sh_wdt_notify_sys,
+};
+
+static struct miscdevice sh_wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &sh_wdt_fops,
+};
+
+/**
+ * sh_wdt_init - Initialize module
+ * Registers the device and notifier handler. Actual device
+ * initialization is handled by sh_wdt_open().
+ */
+static int __init sh_wdt_init(void)
+{
+ int rc;
+
+ if ((clock_division_ratio < 0x5) || (clock_division_ratio > 0x7)) {
+ clock_division_ratio = WTCSR_CKS_4096;
+ printk(KERN_INFO PFX "clock_division_ratio value must "
+ "be 0x5<=x<=0x7, using %d\n", clock_division_ratio);
+ }
+
+ rc = sh_wdt_set_heartbeat(heartbeat);
+ if (unlikely(rc)) {
+ heartbeat = WATCHDOG_HEARTBEAT;
+ printk(KERN_INFO PFX "heartbeat value must "
+ "be 1<=x<=3600, using %d\n", heartbeat);
+ }
+
+ rc = register_reboot_notifier(&sh_wdt_notifier);
+ if (unlikely(rc)) {
+ printk(KERN_ERR PFX "Can't register reboot notifier (err=%d)\n",
+ rc);
+ return rc;
+ }
+
+ rc = misc_register(&sh_wdt_miscdev);
+ if (unlikely(rc)) {
+ printk(KERN_ERR PFX "Can't register miscdev on "
+ "minor=%d (err=%d)\n", sh_wdt_miscdev.minor, rc);
+ unregister_reboot_notifier(&sh_wdt_notifier);
+ return rc;
+ }
+
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+
+ return 0;
+}
+
+/**
+ * sh_wdt_exit - Deinitialize module
+ * Unregisters the device and notifier handler. Actual device
+ * deinitialization is handled by sh_wdt_close().
+ */
+static void __exit sh_wdt_exit(void)
+{
+ misc_deregister(&sh_wdt_miscdev);
+ unregister_reboot_notifier(&sh_wdt_notifier);
+}
+
+MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
+MODULE_DESCRIPTION("SuperH watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(clock_division_ratio, int, 0);
+MODULE_PARM_DESC(clock_division_ratio, "Clock division ratio. Valid ranges are from 0x5 (1.31ms) to 0x7 (5.25ms). (default=" __MODULE_STRING(clock_division_ratio) ")");
+
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<=heartbeat<=3600, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+module_init(sh_wdt_init);
+module_exit(sh_wdt_exit);
--- /dev/null
+/*
+ * SMsC 37B787 Watchdog Timer driver for Linux 2.6.x.x
+ *
+ * Based on acquirewdt.c by Alan Cox <alan@redhat.com>
+ * and some other existing drivers
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The authors do NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (C) Copyright 2003-2006 Sven Anders <anders@anduras.de>
+ *
+ * History:
+ * 2003 - Created version 1.0 for Linux 2.4.x.
+ * 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
+ * features. Released version 1.1
+ *
+ * Theory of operation:
+ *
+ * A Watchdog Timer (WDT) is a hardware circuit that can
+ * reset the computer system in case of a software fault.
+ * You probably knew that already.
+ *
+ * Usually a userspace daemon will notify the kernel WDT driver
+ * via the /dev/watchdog special device file that userspace is
+ * still alive, at regular intervals. When such a notification
+ * occurs, the driver will usually tell the hardware watchdog
+ * that everything is in order, and that the watchdog should wait
+ * for yet another little while to reset the system.
+ * If userspace fails (RAM error, kernel bug, whatever), the
+ * notifications cease to occur, and the hardware watchdog will
+ * reset the system (causing a reboot) after the timeout occurs.
+ *
+ * Create device with:
+ * mknod /dev/watchdog c 10 130
+ *
+ * For an example userspace keep-alive daemon, see:
+ * Documentation/watchdog/watchdog.txt
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+/* enable support for minutes as units? */
+/* (does not always work correctly, so disabled by default!) */
+#define SMSC_SUPPORT_MINUTES
+#undef SMSC_SUPPORT_MINUTES
+
+#define MAX_TIMEOUT 255
+
+#define UNIT_SECOND 0
+#define UNIT_MINUTE 1
+
+#define MODNAME "smsc37b787_wdt: "
+#define VERSION "1.1"
+
+#define IOPORT 0x3F0
+#define IOPORT_SIZE 2
+#define IODEV_NO 8
+
+static int unit = UNIT_SECOND; /* timer's unit */
+static int timeout = 60; /* timeout value: default is 60 "units" */
+static unsigned long timer_enabled = 0; /* is the timer enabled? */
+
+static char expect_close; /* is the close expected? */
+
+static spinlock_t io_lock; /* to guard the watchdog from io races */
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+
+/* -- Low level function ----------------------------------------*/
+
+/* unlock the IO chip */
+
+static inline void open_io_config(void)
+{
+ outb(0x55, IOPORT);
+ mdelay(1);
+ outb(0x55, IOPORT);
+}
+
+/* lock the IO chip */
+static inline void close_io_config(void)
+{
+ outb(0xAA, IOPORT);
+}
+
+/* select the IO device */
+static inline void select_io_device(unsigned char devno)
+{
+ outb(0x07, IOPORT);
+ outb(devno, IOPORT+1);
+}
+
+/* write to the control register */
+static inline void write_io_cr(unsigned char reg, unsigned char data)
+{
+ outb(reg, IOPORT);
+ outb(data, IOPORT+1);
+}
+
+/* read from the control register */
+static inline char read_io_cr(unsigned char reg)
+{
+ outb(reg, IOPORT);
+ return inb(IOPORT+1);
+}
+
+/* -- Medium level functions ------------------------------------*/
+
+static inline void gpio_bit12(unsigned char reg)
+{
+ // -- General Purpose I/O Bit 1.2 --
+ // Bit 0, In/Out: 0 = Output, 1 = Input
+ // Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
+ // 11 = Either Edge Triggered Intr. 2
+ // Bit 5/6 (Reserved)
+ // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ write_io_cr(0xE2, reg);
+}
+
+static inline void gpio_bit13(unsigned char reg)
+{
+ // -- General Purpose I/O Bit 1.3 --
+ // Bit 0, In/Out: 0 = Output, 1 = Input
+ // Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ // Bit 3, Function select: 0 = GPI/O, 1 = LED
+ // Bit 4-6 (Reserved)
+ // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ write_io_cr(0xE3, reg);
+}
+
+static inline void wdt_timer_units(unsigned char new_units)
+{
+ // -- Watchdog timer units --
+ // Bit 0-6 (Reserved)
+ // Bit 7, WDT Time-out Value Units Select
+ // (0 = Minutes, 1 = Seconds)
+ write_io_cr(0xF1, new_units);
+}
+
+static inline void wdt_timeout_value(unsigned char new_timeout)
+{
+ // -- Watchdog Timer Time-out Value --
+ // Bit 0-7 Binary coded units (0=Disabled, 1..255)
+ write_io_cr(0xF2, new_timeout);
+}
+
+static inline void wdt_timer_conf(unsigned char conf)
+{
+ // -- Watchdog timer configuration --
+ // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O
+ // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
+ // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr.
+ // Bit 3 Reset the timer
+ // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled)
+ // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
+ // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
+ write_io_cr(0xF3, conf);
+}
+
+static inline void wdt_timer_ctrl(unsigned char reg)
+{
+ // -- Watchdog timer control --
+ // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
+ // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
+ // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
+ // Bit 3 P20 Force Timeout enabled:
+ // 0 = P20 activity does not generate the WD timeout event
+ // 1 = P20 Allows rising edge of P20, from the keyboard
+ // controller, to force the WD timeout event.
+ // Bit 4 (Reserved)
+ // -- Soft power management --
+ // Bit 5 Stop Counter: 1 = Stop software power down counter
+ // set via register 0xB8, (self-cleaning)
+ // (Upon read: 0 = Counter running, 1 = Counter stopped)
+ // Bit 6 Restart Counter: 1 = Restart software power down counter
+ // set via register 0xB8, (self-cleaning)
+ // Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
+
+ write_io_cr(0xF4, reg);
+}
+
+/* -- Higher level functions ------------------------------------*/
+
+/* initialize watchdog */
+
+static void wb_smsc_wdt_initialize(void)
+{
+ unsigned char old;
+
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // enable the watchdog
+ gpio_bit13(0x08); // Select pin 80 = LED not GPIO
+ gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert
+
+ // disable the timeout
+ wdt_timeout_value(0);
+
+ // reset control register
+ wdt_timer_ctrl(0x00);
+
+ // reset configuration register
+ wdt_timer_conf(0x00);
+
+ // read old (timer units) register
+ old = read_io_cr(0xF1) & 0x7F;
+ if (unit == UNIT_SECOND) old |= 0x80; // set to seconds
+
+ // set the watchdog timer units
+ wdt_timer_units(old);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* shutdown the watchdog */
+
+static void wb_smsc_wdt_shutdown(void)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // disable the watchdog
+ gpio_bit13(0x09);
+ gpio_bit12(0x09);
+
+ // reset watchdog config register
+ wdt_timer_conf(0x00);
+
+ // reset watchdog control register
+ wdt_timer_ctrl(0x00);
+
+ // disable timeout
+ wdt_timeout_value(0x00);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* set timeout => enable watchdog */
+
+static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // set Power LED to blink, if we enable the timeout
+ wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
+
+ // set timeout value
+ wdt_timeout_value(new_timeout);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* get timeout */
+
+static unsigned char wb_smsc_wdt_get_timeout(void)
+{
+ unsigned char set_timeout;
+
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+ set_timeout = read_io_cr(0xF2);
+ close_io_config();
+ spin_unlock(&io_lock);
+
+ return set_timeout;
+}
+
+/* disable watchdog */
+
+static void wb_smsc_wdt_disable(void)
+{
+ // set the timeout to 0 to disable the watchdog
+ wb_smsc_wdt_set_timeout(0);
+}
+
+/* enable watchdog by setting the current timeout */
+
+static void wb_smsc_wdt_enable(void)
+{
+ // set the current timeout...
+ wb_smsc_wdt_set_timeout(timeout);
+}
+
+/* reset the timer */
+
+static void wb_smsc_wdt_reset_timer(void)
+{
+ spin_lock(&io_lock);
+ open_io_config();
+ select_io_device(IODEV_NO);
+
+ // reset the timer
+ wdt_timeout_value(timeout);
+ wdt_timer_conf(0x08);
+
+ close_io_config();
+ spin_unlock(&io_lock);
+}
+
+/* return, if the watchdog is enabled (timeout is set...) */
+
+static int wb_smsc_wdt_status(void)
+{
+ return (wb_smsc_wdt_get_timeout() == 0) ? 0 : WDIOF_KEEPALIVEPING;
+}
+
+
+/* -- File operations -------------------------------------------*/
+
+/* open => enable watchdog and set initial timeout */
+
+static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
+{
+ /* /dev/watchdog can only be opened once */
+
+ if (test_and_set_bit(0, &timer_enabled))
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Reload and activate timer */
+ wb_smsc_wdt_enable();
+
+ printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+
+ return nonseekable_open(inode, file);
+}
+
+/* close => shut off the timer */
+
+static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
+{
+ /* Shut off the timer. */
+
+ if (expect_close == 42) {
+ wb_smsc_wdt_disable();
+ printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n");
+ } else {
+ printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n");
+ wb_smsc_wdt_reset_timer();
+ }
+
+ clear_bit(0, &timer_enabled);
+ expect_close = 0;
+ return 0;
+}
+
+/* write => update the timer to keep the machine alive */
+
+static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* reset expect flag */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != len; i++) {
+ char c;
+ if (get_user(c, data+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should reload the timer */
+ wb_smsc_wdt_reset_timer();
+ }
+ return len;
+}
+
+/* ioctl => control interface */
+
+static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int new_timeout;
+
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING |
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "SMsC 37B787 Watchdog"
+ };
+
+ uarg.i = (int __user *)arg;
+
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ return put_user(wb_smsc_wdt_status(), uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ wb_smsc_wdt_reset_timer();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ // the API states this is given in secs
+ if (unit == UNIT_MINUTE)
+ new_timeout /= 60;
+
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wb_smsc_wdt_set_timeout(timeout);
+
+ // fall through and return the new timeout...
+
+ case WDIOC_GETTIMEOUT:
+
+ new_timeout = timeout;
+
+ if (unit == UNIT_MINUTE)
+ new_timeout *= 60;
+
+ return put_user(new_timeout, uarg.i);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, uarg.i))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wb_smsc_wdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wb_smsc_wdt_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ }
+}
+
+/* -- Notifier funtions -----------------------------------------*/
+
+static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT)
+ {
+ // set timeout to 0, to avoid possible race-condition
+ timeout = 0;
+ wb_smsc_wdt_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/* -- Module's structures ---------------------------------------*/
+
+static const struct file_operations wb_smsc_wdt_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wb_smsc_wdt_write,
+ .ioctl = wb_smsc_wdt_ioctl,
+ .open = wb_smsc_wdt_open,
+ .release = wb_smsc_wdt_release,
+};
+
+static struct notifier_block wb_smsc_wdt_notifier =
+{
+ .notifier_call = wb_smsc_wdt_notify_sys,
+};
+
+static struct miscdevice wb_smsc_wdt_miscdev =
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wb_smsc_wdt_fops,
+};
+
+/* -- Module init functions -------------------------------------*/
+
+/* module's "constructor" */
+
+static int __init wb_smsc_wdt_init(void)
+{
+ int ret;
+
+ spin_lock_init(&io_lock);
+
+ printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n");
+
+ if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
+ printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT);
+ ret = -EBUSY;
+ goto out_pnp;
+ }
+
+ // set new maximum, if it's too big
+ if (timeout > MAX_TIMEOUT)
+ timeout = MAX_TIMEOUT;
+
+ // init the watchdog timer
+ wb_smsc_wdt_initialize();
+
+ ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
+ if (ret) {
+ printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret);
+ goto out_io;
+ }
+
+ ret = misc_register(&wb_smsc_wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
+ goto out_rbt;
+ }
+
+ // output info
+ printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+ printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout);
+
+ // ret = 0
+
+out_clean:
+ return ret;
+
+out_rbt:
+ unregister_reboot_notifier(&wb_smsc_wdt_notifier);
+
+out_io:
+ release_region(IOPORT, IOPORT_SIZE);
+
+out_pnp:
+ goto out_clean;
+}
+
+/* module's "destructor" */
+
+static void __exit wb_smsc_wdt_exit(void)
+{
+ /* Stop the timer before we leave */
+ if (!nowayout)
+ {
+ wb_smsc_wdt_shutdown();
+ printk(KERN_INFO MODNAME "Watchdog disabled.\n");
+ }
+
+ misc_deregister(&wb_smsc_wdt_miscdev);
+ unregister_reboot_notifier(&wb_smsc_wdt_notifier);
+ release_region(IOPORT, IOPORT_SIZE);
+
+ printk("SMsC 37B787 watchdog component driver removed.\n");
+}
+
+module_init(wb_smsc_wdt_init);
+module_exit(wb_smsc_wdt_exit);
+
+MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
+MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")");
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+#ifdef SMSC_SUPPORT_MINUTES
+module_param(unit, int, 0);
+MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0");
+#endif
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
--- /dev/null
+/*
+ * SoftDog 0.07: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Software only watchdog driver. Unlike its big brother the WDT501P
+ * driver this won't always recover a failed machine.
+ *
+ * 03/96: Angelo Haritsis <ah@doc.ic.ac.uk> :
+ * Modularised.
+ * Added soft_margin; use upon insmod to change the timer delay.
+ * NB: uses same minor as wdt (WATCHDOG_MINOR); we could use separate
+ * minors.
+ *
+ * 19980911 Alan Cox
+ * Made SMP safe for 2.3.x
+ *
+ * 20011127 Joel Becker (jlbec@evilplan.org>
+ * Added soft_noboot; Allows testing the softdog trigger without
+ * requiring a recompile.
+ * Added WDIOC_GETTIMEOUT and WDIOC_SETTIMOUT.
+ *
+ * 20020530 Joel Becker <joel.becker@oracle.com>
+ * Added Matt Domsch's nowayout module option.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+
+#include <asm/uaccess.h>
+
+#define PFX "SoftDog: "
+
+#define TIMER_MARGIN 60 /* Default is 60 seconds */
+static int soft_margin = TIMER_MARGIN; /* in seconds */
+module_param(soft_margin, int, 0);
+MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#ifdef ONLY_TESTING
+static int soft_noboot = 1;
+#else
+static int soft_noboot = 0;
+#endif /* ONLY_TESTING */
+
+module_param(soft_noboot, int, 0);
+MODULE_PARM_DESC(soft_noboot, "Softdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
+
+/*
+ * Our timer
+ */
+
+static void watchdog_fire(unsigned long);
+
+static struct timer_list watchdog_ticktock =
+ TIMER_INITIALIZER(watchdog_fire, 0, 0);
+static unsigned long driver_open, orphan_timer;
+static char expect_close;
+
+
+/*
+ * If the timer expires..
+ */
+
+static void watchdog_fire(unsigned long data)
+{
+ if (test_and_clear_bit(0, &orphan_timer))
+ module_put(THIS_MODULE);
+
+ if (soft_noboot)
+ printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n");
+ else
+ {
+ printk(KERN_CRIT PFX "Initiating system reboot.\n");
+ emergency_restart();
+ printk(KERN_CRIT PFX "Reboot didn't ?????\n");
+ }
+}
+
+/*
+ * Softdog operations
+ */
+
+static int softdog_keepalive(void)
+{
+ mod_timer(&watchdog_ticktock, jiffies+(soft_margin*HZ));
+ return 0;
+}
+
+static int softdog_stop(void)
+{
+ del_timer(&watchdog_ticktock);
+ return 0;
+}
+
+static int softdog_set_heartbeat(int t)
+{
+ if ((t < 0x0001) || (t > 0xFFFF))
+ return -EINVAL;
+
+ soft_margin = t;
+ return 0;
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int softdog_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &driver_open))
+ return -EBUSY;
+ if (!test_and_clear_bit(0, &orphan_timer))
+ __module_get(THIS_MODULE);
+ /*
+ * Activate timer
+ */
+ softdog_keepalive();
+ return nonseekable_open(inode, file);
+}
+
+static int softdog_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+ if (expect_close == 42) {
+ softdog_stop();
+ module_put(THIS_MODULE);
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ set_bit(0, &orphan_timer);
+ softdog_keepalive();
+ }
+ clear_bit(0, &driver_open);
+ expect_close = 0;
+ return 0;
+}
+
+static ssize_t softdog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+{
+ /*
+ * Refresh the timer.
+ */
+ if(len) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != len; i++) {
+ char c;
+
+ if (get_user(c, data + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ softdog_keepalive();
+ }
+ return len;
+}
+
+static int softdog_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_margin;
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
+ .firmware_version = 0,
+ .identity = "Software Watchdog",
+ };
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ softdog_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (softdog_set_heartbeat(new_margin))
+ return -EINVAL;
+ softdog_keepalive();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(soft_margin, p);
+ }
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int softdog_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the WDT off */
+ softdog_stop();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations softdog_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = softdog_write,
+ .ioctl = softdog_ioctl,
+ .open = softdog_open,
+ .release = softdog_release,
+};
+
+static struct miscdevice softdog_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &softdog_fops,
+};
+
+static struct notifier_block softdog_notifier = {
+ .notifier_call = softdog_notify_sys,
+};
+
+static char banner[] __initdata = KERN_INFO "Software Watchdog Timer: 0.07 initialized. soft_noboot=%d soft_margin=%d sec (nowayout= %d)\n";
+
+static int __init watchdog_init(void)
+{
+ int ret;
+
+ /* Check that the soft_margin value is within it's range ; if not reset to the default */
+ if (softdog_set_heartbeat(soft_margin)) {
+ softdog_set_heartbeat(TIMER_MARGIN);
+ printk(KERN_INFO PFX "soft_margin value must be 0<soft_margin<65536, using %d\n",
+ TIMER_MARGIN);
+ }
+
+ ret = register_reboot_notifier(&softdog_notifier);
+ if (ret) {
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ return ret;
+ }
+
+ ret = misc_register(&softdog_miscdev);
+ if (ret) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ unregister_reboot_notifier(&softdog_notifier);
+ return ret;
+ }
+
+ printk(banner, soft_noboot, soft_margin, nowayout);
+
+ return 0;
+}
+
+static void __exit watchdog_exit(void)
+{
+ misc_deregister(&softdog_miscdev);
+ unregister_reboot_notifier(&softdog_notifier);
+}
+
+module_init(watchdog_init);
+module_exit(watchdog_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Software Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * w83627hf/thf WDT driver
+ *
+ * (c) Copyright 2007 Vlad Drukker <vlad@storewiz.com>
+ * added support for W83627THF.
+ *
+ * (c) Copyright 2003,2007 Pádraig Brady <P@draigBrady.com>
+ *
+ * Based on advantechwdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define WATCHDOG_NAME "w83627hf/thf/hg WDT"
+#define PFX WATCHDOG_NAME ": "
+#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
+
+static unsigned long wdt_is_open;
+static char expect_close;
+static spinlock_t io_lock;
+
+/* You must set this - there is no sane way to probe for this board. */
+static int wdt_io = 0x2E;
+module_param(wdt_io, int, 0);
+MODULE_PARM_DESC(wdt_io, "w83627hf/thf WDT io port (default 0x2E)");
+
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Kernel methods.
+ */
+
+#define WDT_EFER (wdt_io+0) /* Extended Function Enable Registers */
+#define WDT_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
+#define WDT_EFDR (WDT_EFIR+1) /* Extended Function Data Register */
+
+static void
+w83627hf_select_wd_register(void)
+{
+ unsigned char c;
+ outb_p(0x87, WDT_EFER); /* Enter extended function mode */
+ outb_p(0x87, WDT_EFER); /* Again according to manual */
+
+ outb(0x20, WDT_EFER); /* check chip version */
+ c = inb(WDT_EFDR);
+ if (c == 0x82) { /* W83627THF */
+ outb_p(0x2b, WDT_EFER); /* select GPIO3 */
+ c = ((inb_p(WDT_EFDR) & 0xf7) | 0x04); /* select WDT0 */
+ outb_p(0x2b, WDT_EFER);
+ outb_p(c, WDT_EFDR); /* set GPIO3 to WDT0 */
+ }
+
+ outb_p(0x07, WDT_EFER); /* point to logical device number reg */
+ outb_p(0x08, WDT_EFDR); /* select logical device 8 (GPIO2) */
+ outb_p(0x30, WDT_EFER); /* select CR30 */
+ outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
+}
+
+static void
+w83627hf_unselect_wd_register(void)
+{
+ outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
+}
+
+/* tyan motherboards seem to set F5 to 0x4C ?
+ * So explicitly init to appropriate value. */
+static void
+w83627hf_init(void)
+{
+ unsigned char t;
+
+ w83627hf_select_wd_register();
+
+ outb_p(0xF6, WDT_EFER); /* Select CRF6 */
+ t=inb_p(WDT_EFDR); /* read CRF6 */
+ if (t != 0) {
+ printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
+ outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
+ }
+
+ outb_p(0xF5, WDT_EFER); /* Select CRF5 */
+ t=inb_p(WDT_EFDR); /* read CRF5 */
+ t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */
+ outb_p(t, WDT_EFDR); /* Write back to CRF5 */
+
+ outb_p(0xF7, WDT_EFER); /* Select CRF7 */
+ t=inb_p(WDT_EFDR); /* read CRF7 */
+ t&=~0xC0; /* disable keyboard & mouse turning off watchdog */
+ outb_p(t, WDT_EFDR); /* Write back to CRF7 */
+
+ w83627hf_unselect_wd_register();
+}
+
+static void
+wdt_ctrl(int timeout)
+{
+ spin_lock(&io_lock);
+
+ w83627hf_select_wd_register();
+
+ outb_p(0xF6, WDT_EFER); /* Select CRF6 */
+ outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF6 */
+
+ w83627hf_unselect_wd_register();
+
+ spin_unlock(&io_lock);
+}
+
+static int
+wdt_ping(void)
+{
+ wdt_ctrl(timeout);
+ return 0;
+}
+
+static int
+wdt_disable(void)
+{
+ wdt_ctrl(0);
+ return 0;
+}
+
+static int
+wdt_set_heartbeat(int t)
+{
+ if ((t < 1) || (t > 255))
+ return -EINVAL;
+
+ timeout = t;
+ return 0;
+}
+
+static ssize_t
+wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ wdt_ping();
+ }
+ return count;
+}
+
+static int
+wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_timeout;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "W83627HF WDT",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (wdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ wdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wdt_ping();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int
+wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ /*
+ * Activate
+ */
+
+ wdt_ping();
+ return nonseekable_open(inode, file);
+}
+
+static int
+wdt_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ wdt_disable();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ wdt_ping();
+ }
+ expect_close = 0;
+ clear_bit(0, &wdt_is_open);
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int
+wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the WDT off */
+ wdt_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt_write,
+ .ioctl = wdt_ioctl,
+ .open = wdt_open,
+ .release = wdt_close,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+static int __init
+wdt_init(void)
+{
+ int ret;
+
+ spin_lock_init(&io_lock);
+
+ printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF/THF/HG Super I/O chip initialising.\n");
+
+ if (wdt_set_heartbeat(timeout)) {
+ wdt_set_heartbeat(WATCHDOG_TIMEOUT);
+ printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
+ WATCHDOG_TIMEOUT);
+ }
+
+ if (!request_region(wdt_io, 1, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_io);
+ ret = -EIO;
+ goto out;
+ }
+
+ w83627hf_init();
+
+ ret = register_reboot_notifier(&wdt_notifier);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto unreg_regions;
+ }
+
+ ret = misc_register(&wdt_miscdev);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto unreg_reboot;
+ }
+
+ printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+out:
+ return ret;
+unreg_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
+unreg_regions:
+ release_region(wdt_io, 1);
+ goto out;
+}
+
+static void __exit
+wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(wdt_io,1);
+}
+
+module_init(wdt_init);
+module_exit(wdt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pádraig Brady <P@draigBrady.com>");
+MODULE_DESCRIPTION("w83627hf/thf WDT driver");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * w83697hf/hg WDT driver
+ *
+ * (c) Copyright 2006 Samuel Tardieu <sam@rfc1149.net>
+ * (c) Copyright 2006 Marcus Junker <junker@anduras.de>
+ *
+ * Based on w83627hf_wdt.c which is based on advantechwdt.c
+ * which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 2003 Pádraig Brady <P@draigBrady.com>
+ *
+ * (c) Copyright 2000-2001 Marek Michalkiewicz <marekm@linux.org.pl>
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Marcus Junker nor ANDURAS AG admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define WATCHDOG_NAME "w83697hf/hg WDT"
+#define PFX WATCHDOG_NAME ": "
+#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
+
+static unsigned long wdt_is_open;
+static char expect_close;
+static spinlock_t io_lock;
+
+/* You must set this - there is no sane way to probe for this board. */
+static int wdt_io = 0x2e;
+module_param(wdt_io, int, 0);
+MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)");
+
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Kernel methods.
+ */
+
+#define W83697HF_EFER (wdt_io+0) /* Extended Function Enable Register */
+#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
+#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */
+
+static inline void
+w83697hf_unlock(void)
+{
+ outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */
+ outb_p(0x87, W83697HF_EFER); /* Again according to manual */
+}
+
+static inline void
+w83697hf_lock(void)
+{
+ outb_p(0xAA, W83697HF_EFER); /* Leave extended function mode */
+}
+
+/*
+ * The three functions w83697hf_get_reg(), w83697hf_set_reg() and
+ * w83697hf_write_timeout() must be called with the device unlocked.
+ */
+
+static unsigned char
+w83697hf_get_reg(unsigned char reg)
+{
+ outb_p(reg, W83697HF_EFIR);
+ return inb_p(W83697HF_EFDR);
+}
+
+static void
+w83697hf_set_reg(unsigned char reg, unsigned char data)
+{
+ outb_p(reg, W83697HF_EFIR);
+ outb_p(data, W83697HF_EFDR);
+}
+
+static void
+w83697hf_write_timeout(int timeout)
+{
+ w83697hf_set_reg(0xF4, timeout); /* Write Timeout counter to CRF4 */
+}
+
+static void
+w83697hf_select_wdt(void)
+{
+ w83697hf_unlock();
+ w83697hf_set_reg(0x07, 0x08); /* Switch to logic device 8 (GPIO2) */
+}
+
+static inline void
+w83697hf_deselect_wdt(void)
+{
+ w83697hf_lock();
+}
+
+static void
+w83697hf_init(void)
+{
+ unsigned char bbuf;
+
+ w83697hf_select_wdt();
+
+ bbuf = w83697hf_get_reg(0x29);
+ bbuf &= ~0x60;
+ bbuf |= 0x20;
+ w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
+
+ bbuf = w83697hf_get_reg(0xF3);
+ bbuf &= ~0x04;
+ w83697hf_set_reg(0xF3, bbuf); /* Count mode is seconds */
+
+ w83697hf_deselect_wdt();
+}
+
+static int
+wdt_ping(void)
+{
+ spin_lock(&io_lock);
+ w83697hf_select_wdt();
+
+ w83697hf_write_timeout(timeout);
+
+ w83697hf_deselect_wdt();
+ spin_unlock(&io_lock);
+ return 0;
+}
+
+static int
+wdt_enable(void)
+{
+ spin_lock(&io_lock);
+ w83697hf_select_wdt();
+
+ w83697hf_write_timeout(timeout);
+ w83697hf_set_reg(0x30, 1); /* Enable timer */
+
+ w83697hf_deselect_wdt();
+ spin_unlock(&io_lock);
+ return 0;
+}
+
+static int
+wdt_disable(void)
+{
+ spin_lock(&io_lock);
+ w83697hf_select_wdt();
+
+ w83697hf_set_reg(0x30, 0); /* Disable timer */
+ w83697hf_write_timeout(0);
+
+ w83697hf_deselect_wdt();
+ spin_unlock(&io_lock);
+ return 0;
+}
+
+static int
+wdt_set_heartbeat(int t)
+{
+ if ((t < 1) || (t > 255))
+ return -EINVAL;
+
+ timeout = t;
+ return 0;
+}
+
+static ssize_t
+wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ wdt_ping();
+ }
+ return count;
+}
+
+static int
+wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_timeout;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "W83697HF WDT",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (wdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ wdt_ping();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wdt_disable();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wdt_enable();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int
+wdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ /*
+ * Activate
+ */
+
+ wdt_enable();
+ return nonseekable_open(inode, file);
+}
+
+static int
+wdt_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ wdt_disable();
+ } else {
+ printk (KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ wdt_ping();
+ }
+ expect_close = 0;
+ clear_bit(0, &wdt_is_open);
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int
+wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the WDT off */
+ wdt_disable();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt_write,
+ .ioctl = wdt_ioctl,
+ .open = wdt_open,
+ .release = wdt_close,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+static int
+w83697hf_check_wdt(void)
+{
+ if (!request_region(wdt_io, 2, WATCHDOG_NAME)) {
+ printk (KERN_ERR PFX "I/O address 0x%x already in use\n", wdt_io);
+ return -EIO;
+ }
+
+ printk (KERN_DEBUG PFX "Looking for watchdog at address 0x%x\n", wdt_io);
+ w83697hf_unlock();
+ if (w83697hf_get_reg(0x20) == 0x60) {
+ printk (KERN_INFO PFX "watchdog found at address 0x%x\n", wdt_io);
+ w83697hf_lock();
+ return 0;
+ }
+ w83697hf_lock(); /* Reprotect in case it was a compatible device */
+
+ printk (KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io);
+ release_region(wdt_io, 2);
+ return -EIO;
+}
+
+static int w83697hf_ioports[] = { 0x2e, 0x4e, 0x00 };
+
+static int __init
+wdt_init(void)
+{
+ int ret, i, found = 0;
+
+ spin_lock_init(&io_lock);
+
+ printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
+
+ if (wdt_io == 0) {
+ /* we will autodetect the W83697HF/HG watchdog */
+ for (i = 0; ((!found) && (w83697hf_ioports[i] != 0)); i++) {
+ wdt_io = w83697hf_ioports[i];
+ if (!w83697hf_check_wdt())
+ found++;
+ }
+ } else {
+ if (!w83697hf_check_wdt())
+ found++;
+ }
+
+ if (!found) {
+ printk (KERN_ERR PFX "No W83697HF/HG could be found\n");
+ ret = -EIO;
+ goto out;
+ }
+
+ w83697hf_init();
+ wdt_disable(); /* Disable watchdog until first use */
+
+ if (wdt_set_heartbeat(timeout)) {
+ wdt_set_heartbeat(WATCHDOG_TIMEOUT);
+ printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
+ WATCHDOG_TIMEOUT);
+ }
+
+ ret = register_reboot_notifier(&wdt_notifier);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto unreg_regions;
+ }
+
+ ret = misc_register(&wdt_miscdev);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto unreg_reboot;
+ }
+
+ printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+out:
+ return ret;
+unreg_reboot:
+ unregister_reboot_notifier(&wdt_notifier);
+unreg_regions:
+ release_region(wdt_io, 2);
+ goto out;
+}
+
+static void __exit
+wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(wdt_io, 2);
+}
+
+module_init(wdt_init);
+module_exit(wdt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marcus Junker <junker@anduras.de>, Samuel Tardieu <sam@rfc1149.net>");
+MODULE_DESCRIPTION("w83697hf/hg WDT driver");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * W83877F Computer Watchdog Timer driver
+ *
+ * Based on acquirewdt.c by Alan Cox,
+ * and sbc60xxwdt.c by Jakob Oestergaard <jakob@unthought.net>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * The authors do NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (c) Copyright 2001 Scott Jennings <linuxdrivers@oro.net>
+ *
+ * 4/19 - 2001 [Initial revision]
+ * 9/27 - 2001 Added spinlocking
+ * 4/12 - 2002 [rob@osinvestor.com] Eliminate extra comments
+ * Eliminate fop_read
+ * Eliminate extra spin_unlock
+ * Added KERN_* tags to printks
+ * add CONFIG_WATCHDOG_NOWAYOUT support
+ * fix possible wdt_is_open race
+ * changed watchdog_info to correctly reflect what the driver offers
+ * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
+ * WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
+ * 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
+ * added extra printk's for startup problems
+ * use module_param
+ * made timeout (the emulated heartbeat) a module_param
+ * made the keepalive ping an internal subroutine
+ *
+ * This WDT driver is different from most other Linux WDT
+ * drivers in that the driver will ping the watchdog by itself,
+ * because this particular WDT has a very short timeout (1.6
+ * seconds) and it would be insane to count on any userspace
+ * daemon always getting scheduled within that time frame.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define OUR_NAME "w83877f_wdt"
+#define PFX OUR_NAME ": "
+
+#define ENABLE_W83877F_PORT 0x3F0
+#define ENABLE_W83877F 0x87
+#define DISABLE_W83877F 0xAA
+#define WDT_PING 0x443
+#define WDT_REGISTER 0x14
+#define WDT_ENABLE 0x9C
+#define WDT_DISABLE 0x8C
+
+/*
+ * The W83877F seems to be fixed at 1.6s timeout (at least on the
+ * EMACS PC-104 board I'm using). If we reset the watchdog every
+ * ~250ms we should be safe. */
+
+#define WDT_INTERVAL (HZ/4+1)
+
+/*
+ * We must not require too good response from the userspace daemon.
+ * Here we require the userspace daemon to send us a heartbeat
+ * char to /dev/watchdog every 30 seconds.
+ */
+
+#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static void wdt_timer_ping(unsigned long);
+static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
+static unsigned long next_heartbeat;
+static unsigned long wdt_is_open;
+static char wdt_expect_close;
+static spinlock_t wdt_spinlock;
+
+/*
+ * Whack the dog
+ */
+
+static void wdt_timer_ping(unsigned long data)
+{
+ /* If we got a heartbeat pulse within the WDT_US_INTERVAL
+ * we agree to ping the WDT
+ */
+ if(time_before(jiffies, next_heartbeat))
+ {
+ /* Ping the WDT */
+ spin_lock(&wdt_spinlock);
+
+ /* Ping the WDT by reading from WDT_PING */
+ inb_p(WDT_PING);
+
+ /* Re-set the timer interval */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+
+ spin_unlock(&wdt_spinlock);
+
+ } else {
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ }
+}
+
+/*
+ * Utility routines
+ */
+
+static void wdt_change(int writeval)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&wdt_spinlock, flags);
+
+ /* buy some time */
+ inb_p(WDT_PING);
+
+ /* make W83877F available */
+ outb_p(ENABLE_W83877F, ENABLE_W83877F_PORT);
+ outb_p(ENABLE_W83877F, ENABLE_W83877F_PORT);
+
+ /* enable watchdog */
+ outb_p(WDT_REGISTER, ENABLE_W83877F_PORT);
+ outb_p(writeval, ENABLE_W83877F_PORT+1);
+
+ /* lock the W8387FF away */
+ outb_p(DISABLE_W83877F, ENABLE_W83877F_PORT);
+
+ spin_unlock_irqrestore(&wdt_spinlock, flags);
+}
+
+static void wdt_startup(void)
+{
+ next_heartbeat = jiffies + (timeout * HZ);
+
+ /* Start the timer */
+ mod_timer(&timer, jiffies + WDT_INTERVAL);
+
+ wdt_change(WDT_ENABLE);
+
+ printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
+}
+
+static void wdt_turnoff(void)
+{
+ /* Stop the timer */
+ del_timer(&timer);
+
+ wdt_change(WDT_DISABLE);
+
+ printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
+}
+
+static void wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+}
+
+/*
+ * /dev/watchdog handling
+ */
+
+static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count)
+ {
+ if (!nowayout)
+ {
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ wdt_expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for(ofs = 0; ofs != count; ofs++)
+ {
+ char c;
+ if (get_user(c, buf + ofs))
+ return -EFAULT;
+ if (c == 'V')
+ wdt_expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should restart timer */
+ wdt_keepalive();
+ }
+ return count;
+}
+
+static int fop_open(struct inode * inode, struct file * file)
+{
+ /* Just in case we're already talking to someone... */
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+
+ /* Good, fire up the show */
+ wdt_startup();
+ return nonseekable_open(inode, file);
+}
+
+static int fop_close(struct inode * inode, struct file * file)
+{
+ if(wdt_expect_close == 42)
+ wdt_turnoff();
+ else {
+ del_timer(&timer);
+ printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ }
+ clear_bit(0, &wdt_is_open);
+ wdt_expect_close = 0;
+ return 0;
+}
+
+static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident=
+ {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "W83877F",
+ };
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if(get_user(new_options, p))
+ return -EFAULT;
+
+ if(new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
+
+ if(new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if(get_user(new_timeout, p))
+ return -EFAULT;
+
+ if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ }
+}
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = fop_write,
+ .open = fop_open,
+ .release = fop_close,
+ .ioctl = fop_ioctl,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+/*
+ * Notifier for system down
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT)
+ wdt_turnoff();
+ return NOTIFY_DONE;
+}
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier=
+{
+ .notifier_call = wdt_notify_sys,
+};
+
+static void __exit w83877f_wdt_unload(void)
+{
+ wdt_turnoff();
+
+ /* Deregister */
+ misc_deregister(&wdt_miscdev);
+
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(WDT_PING,1);
+ release_region(ENABLE_W83877F_PORT,2);
+}
+
+static int __init w83877f_wdt_init(void)
+{
+ int rc = -EBUSY;
+
+ spin_lock_init(&wdt_spinlock);
+
+ if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
+ {
+ timeout = WATCHDOG_TIMEOUT;
+ printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
+ timeout);
+ }
+
+ if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ ENABLE_W83877F_PORT);
+ rc = -EIO;
+ goto err_out;
+ }
+
+ if (!request_region(WDT_PING, 1, "W8387FF WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ WDT_PING);
+ rc = -EIO;
+ goto err_out_region1;
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_region2;
+ }
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
+ }
+
+ printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+ return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt_miscdev);
+err_out_region2:
+ release_region(WDT_PING,1);
+err_out_region1:
+ release_region(ENABLE_W83877F_PORT,2);
+err_out:
+ return rc;
+}
+
+module_init(w83877f_wdt_init);
+module_exit(w83877f_wdt_unload);
+
+MODULE_AUTHOR("Scott and Bill Jennings");
+MODULE_DESCRIPTION("Driver for watchdog timer in w83877f chip");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * W83977F Watchdog Timer Driver for Winbond W83977F I/O Chip
+ *
+ * (c) Copyright 2005 Jose Goncalves <jose.goncalves@inov.pt>
+ *
+ * Based on w83877f_wdt.c by Scott Jennings,
+ * and wdt977.c by Woody Suwalski
+ *
+ * -----------------------
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#define WATCHDOG_VERSION "1.00"
+#define WATCHDOG_NAME "W83977F WDT"
+#define PFX WATCHDOG_NAME ": "
+#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
+
+#define IO_INDEX_PORT 0x3F0
+#define IO_DATA_PORT (IO_INDEX_PORT+1)
+
+#define UNLOCK_DATA 0x87
+#define LOCK_DATA 0xAA
+#define DEVICE_REGISTER 0x07
+
+#define DEFAULT_TIMEOUT 45 /* default timeout in seconds */
+
+static int timeout = DEFAULT_TIMEOUT;
+static int timeoutW; /* timeout in watchdog counter units */
+static unsigned long timer_alive;
+static int testmode;
+static char expect_close;
+static spinlock_t spinlock;
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (15..7635), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
+module_param(testmode, int, 0);
+MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Start the watchdog
+ */
+
+static int wdt_start(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* Unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+
+ /*
+ * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
+ * F2 has the timeout in watchdog counter units.
+ * F3 is set to enable watchdog LED blink at timeout.
+ * F4 is used to just clear the TIMEOUT'ed state (bit 0).
+ */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xF2,IO_INDEX_PORT);
+ outb_p(timeoutW,IO_DATA_PORT);
+ outb_p(0xF3,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xF4,IO_INDEX_PORT);
+ outb_p(0x00,IO_DATA_PORT);
+
+ /* Set device Aux2 active */
+ outb_p(0x30,IO_INDEX_PORT);
+ outb_p(0x01,IO_DATA_PORT);
+
+ /*
+ * Select device Aux1 (dev=7) to set GP16 as the watchdog output
+ * (in reg E6) and GP13 as the watchdog LED output (in reg E3).
+ * Map GP16 at pin 119.
+ * In test mode watch the bit 0 on F4 to indicate "triggered" or
+ * check watchdog LED on SBC.
+ */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x07,IO_DATA_PORT);
+ if (!testmode)
+ {
+ unsigned pin_map;
+
+ outb_p(0xE6,IO_INDEX_PORT);
+ outb_p(0x0A,IO_DATA_PORT);
+ outb_p(0x2C,IO_INDEX_PORT);
+ pin_map = inb_p(IO_DATA_PORT);
+ pin_map |= 0x10;
+ pin_map &= ~(0x20);
+ outb_p(0x2C,IO_INDEX_PORT);
+ outb_p(pin_map,IO_DATA_PORT);
+ }
+ outb_p(0xE3,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+
+ /* Set device Aux1 active */
+ outb_p(0x30,IO_INDEX_PORT);
+ outb_p(0x01,IO_DATA_PORT);
+
+ /* Lock the SuperIO chip */
+ outb_p(LOCK_DATA,IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ printk(KERN_INFO PFX "activated.\n");
+
+ return 0;
+}
+
+/*
+ * Stop the watchdog
+ */
+
+static int wdt_stop(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* Unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+
+ /*
+ * Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
+ * F2 is reset to its default value (watchdog timer disabled).
+ * F3 is reset to its default state.
+ * F4 clears the TIMEOUT'ed state (bit 0) - back to default.
+ */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xF2,IO_INDEX_PORT);
+ outb_p(0xFF,IO_DATA_PORT);
+ outb_p(0xF3,IO_INDEX_PORT);
+ outb_p(0x00,IO_DATA_PORT);
+ outb_p(0xF4,IO_INDEX_PORT);
+ outb_p(0x00,IO_DATA_PORT);
+ outb_p(0xF2,IO_INDEX_PORT);
+ outb_p(0x00,IO_DATA_PORT);
+
+ /*
+ * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
+ * Gp13 (in reg E3) as inputs.
+ */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x07,IO_DATA_PORT);
+ if (!testmode)
+ {
+ outb_p(0xE6,IO_INDEX_PORT);
+ outb_p(0x01,IO_DATA_PORT);
+ }
+ outb_p(0xE3,IO_INDEX_PORT);
+ outb_p(0x01,IO_DATA_PORT);
+
+ /* Lock the SuperIO chip */
+ outb_p(LOCK_DATA,IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ printk(KERN_INFO PFX "shutdown.\n");
+
+ return 0;
+}
+
+/*
+ * Send a keepalive ping to the watchdog
+ * This is done by simply re-writing the timeout to reg. 0xF2
+ */
+
+static int wdt_keepalive(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* Unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+
+ /* Select device Aux2 (device=8) to kick watchdog reg F2 */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xF2,IO_INDEX_PORT);
+ outb_p(timeoutW,IO_DATA_PORT);
+
+ /* Lock the SuperIO chip */
+ outb_p(LOCK_DATA,IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ return 0;
+}
+
+/*
+ * Set the watchdog timeout value
+ */
+
+static int wdt_set_timeout(int t)
+{
+ int tmrval;
+
+ /*
+ * Convert seconds to watchdog counter time units, rounding up.
+ * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
+ * value. This information is supplied in the PCM-5335 manual and was
+ * checked by me on a real board. This is a bit strange because W83977f
+ * datasheet says counter unit is in minutes!
+ */
+ if (t < 15)
+ return -EINVAL;
+
+ tmrval = ((t + 15) + 29) / 30;
+
+ if (tmrval > 255)
+ return -EINVAL;
+
+ /*
+ * timeout is the timeout in seconds,
+ * timeoutW is the timeout in watchdog counter units.
+ */
+ timeoutW = tmrval;
+ timeout = (timeoutW * 30) - 15;
+ return 0;
+}
+
+/*
+ * Get the watchdog status
+ */
+
+static int wdt_get_status(int *status)
+{
+ int new_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* Unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+
+ /* Select device Aux2 (device=8) to read watchdog reg F4 */
+ outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
+ outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xF4,IO_INDEX_PORT);
+ new_status = inb_p(IO_DATA_PORT);
+
+ /* Lock the SuperIO chip */
+ outb_p(LOCK_DATA,IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ *status = 0;
+ if (new_status & 1)
+ *status |= WDIOF_CARDRESET;
+
+ return 0;
+}
+
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int wdt_open(struct inode *inode, struct file *file)
+{
+ /* If the watchdog is alive we don't need to start it again */
+ if( test_and_set_bit(0, &timer_alive) )
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int wdt_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+ if (expect_close == 42)
+ {
+ wdt_stop();
+ clear_bit(0, &timer_alive);
+ } else {
+ wdt_keepalive();
+ printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
+ }
+ expect_close = 0;
+ return 0;
+}
+
+/*
+ * wdt_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count)
+ {
+ if (!nowayout)
+ {
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character long ago */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for(ofs = 0; ofs != count; ofs++)
+ {
+ char c;
+ if (get_user(c, buf + ofs))
+ return -EFAULT;
+ if (c == 'V') {
+ expect_close = 42;
+ }
+ }
+ }
+
+ /* someone wrote to us, we should restart timer */
+ wdt_keepalive();
+ }
+ return count;
+}
+
+/*
+ * wdt_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features.
+ */
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = WATCHDOG_NAME,
+};
+
+static int wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int status;
+ int new_options, retval = -EINVAL;
+ int new_timeout;
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ uarg.i = (int __user *)arg;
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident, sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ wdt_get_status(&status);
+ return put_user(status, uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user (new_options, uarg.i))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt_stop();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt_start();
+ retval = 0;
+ }
+
+ return retval;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ if (wdt_set_timeout(new_timeout))
+ return -EINVAL;
+
+ wdt_keepalive();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, uarg.i);
+
+ }
+}
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT)
+ wdt_stop();
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations wdt_fops=
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt_write,
+ .ioctl = wdt_ioctl,
+ .open = wdt_open,
+ .release = wdt_release,
+};
+
+static struct miscdevice wdt_miscdev=
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+static int __init w83977f_wdt_init(void)
+{
+ int rc;
+
+ printk(KERN_INFO PFX DRIVER_VERSION);
+
+ spin_lock_init(&spinlock);
+
+ /*
+ * Check that the timeout value is within it's range ;
+ * if not reset to the default
+ */
+ if (wdt_set_timeout(timeout)) {
+ wdt_set_timeout(DEFAULT_TIMEOUT);
+ printk(KERN_INFO PFX "timeout value must be 15<=timeout<=7635, using %d\n",
+ DEFAULT_TIMEOUT);
+ }
+
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ IO_INDEX_PORT);
+ rc = -EIO;
+ goto err_out;
+ }
+
+ rc = misc_register(&wdt_miscdev);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
+ goto err_out_region;
+ }
+
+ rc = register_reboot_notifier(&wdt_notifier);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
+ }
+
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
+ timeout, nowayout, testmode);
+
+ return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt_miscdev);
+err_out_region:
+ release_region(IO_INDEX_PORT,2);
+err_out:
+ return rc;
+}
+
+static void __exit w83977f_wdt_exit(void)
+{
+ wdt_stop();
+ misc_deregister(&wdt_miscdev);
+ unregister_reboot_notifier(&wdt_notifier);
+ release_region(IO_INDEX_PORT,2);
+}
+
+module_init(w83977f_wdt_init);
+module_exit(w83977f_wdt_exit);
+
+MODULE_AUTHOR("Jose Goncalves <jose.goncalves@inov.pt>");
+MODULE_DESCRIPTION("Driver for watchdog timer in W83977F I/O chip");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * ICP Wafer 5823 Single Board Computer WDT driver
+ * http://www.icpamerica.com/wafer_5823.php
+ * May also work on other similar models
+ *
+ * (c) Copyright 2002 Justin Cormack <justin@street-vision.com>
+ *
+ * Release 0.02
+ *
+ * Based on advantechwdt.c which is based on wdt.c.
+ * Original copyright messages:
+ *
+ * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define WATCHDOG_NAME "Wafer 5823 WDT"
+#define PFX WATCHDOG_NAME ": "
+#define WD_TIMO 60 /* 60 sec default timeout */
+
+static unsigned long wafwdt_is_open;
+static char expect_close;
+static spinlock_t wafwdt_lock;
+
+/*
+ * You must set these - there is no sane way to probe for this board.
+ *
+ * To enable, write the timeout value in seconds (1 to 255) to I/O
+ * port WDT_START, then read the port to start the watchdog. To pat
+ * the dog, read port WDT_STOP to stop the timer, then read WDT_START
+ * to restart it again.
+ */
+
+static int wdt_stop = 0x843;
+static int wdt_start = 0x443;
+
+static int timeout = WD_TIMO; /* in seconds */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) ".");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+static void wafwdt_ping(void)
+{
+ /* pat watchdog */
+ spin_lock(&wafwdt_lock);
+ inb_p(wdt_stop);
+ inb_p(wdt_start);
+ spin_unlock(&wafwdt_lock);
+}
+
+static void wafwdt_start(void)
+{
+ /* start up watchdog */
+ outb_p(timeout, wdt_start);
+ inb_p(wdt_start);
+}
+
+static void
+wafwdt_stop(void)
+{
+ /* stop watchdog */
+ inb_p(wdt_stop);
+}
+
+static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
+{
+ /* See if we got the magic character 'V' and reload the timer */
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ /* scan to see whether or not we got the magic character */
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ /* Well, anyhow someone wrote to us, we should return that favour */
+ wafwdt_ping();
+ }
+ return count;
+}
+
+static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int new_timeout;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .firmware_version = 1,
+ .identity = "Wafer 5823 WDT",
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof (ident)))
+ return -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+
+ case WDIOC_KEEPALIVE:
+ wafwdt_ping();
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if ((new_timeout < 1) || (new_timeout > 255))
+ return -EINVAL;
+ timeout = new_timeout;
+ wafwdt_stop();
+ wafwdt_start();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ wafwdt_start();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ wafwdt_stop();
+ retval = 0;
+ }
+
+ return retval;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+ return 0;
+}
+
+static int wafwdt_open(struct inode *inode, struct file *file)
+{
+ if (test_and_set_bit(0, &wafwdt_is_open))
+ return -EBUSY;
+
+ /*
+ * Activate
+ */
+ wafwdt_start();
+ return nonseekable_open(inode, file);
+}
+
+static int
+wafwdt_close(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ wafwdt_stop();
+ } else {
+ printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ wafwdt_ping();
+ }
+ clear_bit(0, &wafwdt_is_open);
+ expect_close = 0;
+ return 0;
+}
+
+/*
+ * Notifier for system down
+ */
+
+static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+{
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the WDT off */
+ wafwdt_stop();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+static const struct file_operations wafwdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wafwdt_write,
+ .ioctl = wafwdt_ioctl,
+ .open = wafwdt_open,
+ .release = wafwdt_close,
+};
+
+static struct miscdevice wafwdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wafwdt_fops,
+};
+
+/*
+ * The WDT needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wafwdt_notifier = {
+ .notifier_call = wafwdt_notify_sys,
+};
+
+static int __init wafwdt_init(void)
+{
+ int ret;
+
+ printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n");
+
+ spin_lock_init(&wafwdt_lock);
+
+ if (timeout < 1 || timeout > 255) {
+ timeout = WD_TIMO;
+ printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n",
+ timeout);
+ }
+
+ if (wdt_stop != wdt_start) {
+ if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_stop);
+ ret = -EIO;
+ goto error;
+ }
+ }
+
+ if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_start);
+ ret = -EIO;
+ goto error2;
+ }
+
+ ret = register_reboot_notifier(&wafwdt_notifier);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ ret);
+ goto error3;
+ }
+
+ ret = misc_register(&wafwdt_miscdev);
+ if (ret != 0) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto error4;
+ }
+
+ printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
+
+ return ret;
+error4:
+ unregister_reboot_notifier(&wafwdt_notifier);
+error3:
+ release_region(wdt_start, 1);
+error2:
+ if (wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
+error:
+ return ret;
+}
+
+static void __exit wafwdt_exit(void)
+{
+ misc_deregister(&wafwdt_miscdev);
+ unregister_reboot_notifier(&wafwdt_notifier);
+ if(wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
+ release_region(wdt_start, 1);
+}
+
+module_init(wafwdt_init);
+module_exit(wafwdt_exit);
+
+MODULE_AUTHOR("Justin Cormack");
+MODULE_DESCRIPTION("ICP Wafer 5823 Single Board Computer WDT driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+/* end of wafer5823wdt.c */
--- /dev/null
+/*
+ * Industrial Computer Source WDT500/501 driver
+ *
+ * (c) Copyright 1995 CymruNET Ltd
+ * Innovation Centre
+ * Singleton Park
+ * Swansea
+ * Wales
+ * UK
+ * SA2 8PP
+ *
+ * http://www.cymru.net
+ *
+ * This driver is provided under the GNU General Public License, incorporated
+ * herein by reference. The driver is provided without warranty or
+ * support.
+ *
+ * Release 0.04.
+ *
+ */
+
+
+#define WDT_COUNT0 (io+0)
+#define WDT_COUNT1 (io+1)
+#define WDT_COUNT2 (io+2)
+#define WDT_CR (io+3)
+#define WDT_SR (io+4) /* Start buzzer on PCI write */
+#define WDT_RT (io+5) /* Stop buzzer on PCI write */
+#define WDT_BUZZER (io+6) /* PCI only: rd=disable, wr=enable */
+#define WDT_DC (io+7)
+
+/* The following are only on the PCI card, they're outside of I/O space on
+ * the ISA card: */
+#define WDT_CLOCK (io+12) /* COUNT2: rd=16.67MHz, wr=2.0833MHz */
+/* inverted opto isolated reset output: */
+#define WDT_OPTONOTRST (io+13) /* wr=enable, rd=disable */
+/* opto isolated reset output: */
+#define WDT_OPTORST (io+14) /* wr=enable, rd=disable */
+/* programmable outputs: */
+#define WDT_PROGOUT (io+15) /* wr=enable, rd=disable */
+
+ /* FAN 501 500 */
+#define WDC_SR_WCCR 1 /* Active low */ /* X X X */
+#define WDC_SR_TGOOD 2 /* X X - */
+#define WDC_SR_ISOI0 4 /* X X X */
+#define WDC_SR_ISII1 8 /* X X X */
+#define WDC_SR_FANGOOD 16 /* X - - */
+#define WDC_SR_PSUOVER 32 /* Active low */ /* X X - */
+#define WDC_SR_PSUUNDR 64 /* Active low */ /* X X - */
+#define WDC_SR_IRQ 128 /* Active low */ /* X X X */
+
--- /dev/null
+/*
+ * FIXME: add wdrtas_get_status and wdrtas_get_boot_status as soon as
+ * RTAS calls are available
+ */
+
+/*
+ * RTAS watchdog driver
+ *
+ * (C) Copyright IBM Corp. 2005
+ * device driver to exploit watchdog RTAS functions
+ *
+ * Authors : Utz Bacher <utz.bacher@de.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/types.h>
+#include <linux/watchdog.h>
+
+#include <asm/rtas.h>
+#include <asm/uaccess.h>
+
+#define WDRTAS_MAGIC_CHAR 42
+#define WDRTAS_SUPPORTED_MASK (WDIOF_SETTIMEOUT | \
+ WDIOF_MAGICCLOSE)
+
+MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
+MODULE_DESCRIPTION("RTAS watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
+
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+static int wdrtas_nowayout = 1;
+#else
+static int wdrtas_nowayout = 0;
+#endif
+
+static atomic_t wdrtas_miscdev_open = ATOMIC_INIT(0);
+static char wdrtas_expect_close = 0;
+
+static int wdrtas_interval;
+
+#define WDRTAS_THERMAL_SENSOR 3
+static int wdrtas_token_get_sensor_state;
+#define WDRTAS_SURVEILLANCE_IND 9000
+static int wdrtas_token_set_indicator;
+#define WDRTAS_SP_SPI 28
+static int wdrtas_token_get_sp;
+static int wdrtas_token_event_scan;
+
+#define WDRTAS_DEFAULT_INTERVAL 300
+
+#define WDRTAS_LOGBUFFER_LEN 128
+static char wdrtas_logbuffer[WDRTAS_LOGBUFFER_LEN];
+
+
+/*** watchdog access functions */
+
+/**
+ * wdrtas_set_interval - sets the watchdog interval
+ * @interval: new interval
+ *
+ * returns 0 on success, <0 on failures
+ *
+ * wdrtas_set_interval sets the watchdog keepalive interval by calling the
+ * RTAS function set-indicator (surveillance). The unit of interval is
+ * seconds.
+ */
+static int
+wdrtas_set_interval(int interval)
+{
+ long result;
+ static int print_msg = 10;
+
+ /* rtas uses minutes */
+ interval = (interval + 59) / 60;
+
+ result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL,
+ WDRTAS_SURVEILLANCE_IND, 0, interval);
+ if ( (result < 0) && (print_msg) ) {
+ printk(KERN_ERR "wdrtas: setting the watchdog to %i "
+ "timeout failed: %li\n", interval, result);
+ print_msg--;
+ }
+
+ return result;
+}
+
+/**
+ * wdrtas_get_interval - returns the current watchdog interval
+ * @fallback_value: value (in seconds) to use, if the RTAS call fails
+ *
+ * returns the interval
+ *
+ * wdrtas_get_interval returns the current watchdog keepalive interval
+ * as reported by the RTAS function ibm,get-system-parameter. The unit
+ * of the return value is seconds.
+ */
+static int
+wdrtas_get_interval(int fallback_value)
+{
+ long result;
+ char value[4];
+
+ result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL,
+ WDRTAS_SP_SPI, (void *)__pa(&value), 4);
+ if ( (value[0] != 0) || (value[1] != 2) || (value[3] != 0) ||
+ (result < 0) ) {
+ printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog "
+ "timeout (%li). Continuing\n", result);
+ return fallback_value;
+ }
+
+ /* rtas uses minutes */
+ return ((int)value[2]) * 60;
+}
+
+/**
+ * wdrtas_timer_start - starts watchdog
+ *
+ * wdrtas_timer_start starts the watchdog by calling the RTAS function
+ * set-interval (surveillance)
+ */
+static void
+wdrtas_timer_start(void)
+{
+ wdrtas_set_interval(wdrtas_interval);
+}
+
+/**
+ * wdrtas_timer_stop - stops watchdog
+ *
+ * wdrtas_timer_stop stops the watchdog timer by calling the RTAS function
+ * set-interval (surveillance)
+ */
+static void
+wdrtas_timer_stop(void)
+{
+ wdrtas_set_interval(0);
+}
+
+/**
+ * wdrtas_log_scanned_event - logs an event we received during keepalive
+ *
+ * wdrtas_log_scanned_event prints a message to the log buffer dumping
+ * the results of the last event-scan call
+ */
+static void
+wdrtas_log_scanned_event(void)
+{
+ int i;
+
+ for (i = 0; i < WDRTAS_LOGBUFFER_LEN; i += 16)
+ printk(KERN_INFO "wdrtas: dumping event (line %i/%i), data = "
+ "%02x %02x %02x %02x %02x %02x %02x %02x "
+ "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+ (i / 16) + 1, (WDRTAS_LOGBUFFER_LEN / 16),
+ wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1],
+ wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3],
+ wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5],
+ wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7],
+ wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9],
+ wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11],
+ wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13],
+ wdrtas_logbuffer[i + 14], wdrtas_logbuffer[i + 15]);
+}
+
+/**
+ * wdrtas_timer_keepalive - resets watchdog timer to keep system alive
+ *
+ * wdrtas_timer_keepalive restarts the watchdog timer by calling the
+ * RTAS function event-scan and repeats these calls as long as there are
+ * events available. All events will be dumped.
+ */
+static void
+wdrtas_timer_keepalive(void)
+{
+ long result;
+
+ do {
+ result = rtas_call(wdrtas_token_event_scan, 4, 1, NULL,
+ RTAS_EVENT_SCAN_ALL_EVENTS, 0,
+ (void *)__pa(wdrtas_logbuffer),
+ WDRTAS_LOGBUFFER_LEN);
+ if (result < 0)
+ printk(KERN_ERR "wdrtas: event-scan failed: %li\n",
+ result);
+ if (result == 0)
+ wdrtas_log_scanned_event();
+ } while (result == 0);
+}
+
+/**
+ * wdrtas_get_temperature - returns current temperature
+ *
+ * returns temperature or <0 on failures
+ *
+ * wdrtas_get_temperature returns the current temperature in Fahrenheit. It
+ * uses the RTAS call get-sensor-state, token 3 to do so
+ */
+static int
+wdrtas_get_temperature(void)
+{
+ long result;
+ int temperature = 0;
+
+ result = rtas_call(wdrtas_token_get_sensor_state, 2, 2,
+ (void *)__pa(&temperature),
+ WDRTAS_THERMAL_SENSOR, 0);
+
+ if (result < 0)
+ printk(KERN_WARNING "wdrtas: reading the thermal sensor "
+ "faild: %li\n", result);
+ else
+ temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */
+
+ return temperature;
+}
+
+/**
+ * wdrtas_get_status - returns the status of the watchdog
+ *
+ * returns a bitmask of defines WDIOF_... as defined in
+ * include/linux/watchdog.h
+ */
+static int
+wdrtas_get_status(void)
+{
+ return 0; /* TODO */
+}
+
+/**
+ * wdrtas_get_boot_status - returns the reason for the last boot
+ *
+ * returns a bitmask of defines WDIOF_... as defined in
+ * include/linux/watchdog.h, indicating why the watchdog rebooted the system
+ */
+static int
+wdrtas_get_boot_status(void)
+{
+ return 0; /* TODO */
+}
+
+/*** watchdog API and operations stuff */
+
+/* wdrtas_write - called when watchdog device is written to
+ * @file: file structure
+ * @buf: user buffer with data
+ * @len: amount to data written
+ * @ppos: position in file
+ *
+ * returns the number of successfully processed characters, which is always
+ * the number of bytes passed to this function
+ *
+ * wdrtas_write processes all the data given to it and looks for the magic
+ * character 'V'. This character allows the watchdog device to be closed
+ * properly.
+ */
+static ssize_t
+wdrtas_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ int i;
+ char c;
+
+ if (!len)
+ goto out;
+
+ if (!wdrtas_nowayout) {
+ wdrtas_expect_close = 0;
+ /* look for 'V' */
+ for (i = 0; i < len; i++) {
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ /* allow to close device */
+ if (c == 'V')
+ wdrtas_expect_close = WDRTAS_MAGIC_CHAR;
+ }
+ }
+
+ wdrtas_timer_keepalive();
+
+out:
+ return len;
+}
+
+/**
+ * wdrtas_ioctl - ioctl function for the watchdog device
+ * @inode: inode structure
+ * @file: file structure
+ * @cmd: command for ioctl
+ * @arg: argument pointer
+ *
+ * returns 0 on success, <0 on failure
+ *
+ * wdrtas_ioctl implements the watchdog API ioctls
+ */
+static int
+wdrtas_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int __user *argp = (void __user *)arg;
+ int i;
+ static struct watchdog_info wdinfo = {
+ .options = WDRTAS_SUPPORTED_MASK,
+ .firmware_version = 0,
+ .identity = "wdrtas"
+ };
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &wdinfo, sizeof(wdinfo)))
+ return -EFAULT;
+ return 0;
+
+ case WDIOC_GETSTATUS:
+ i = wdrtas_get_status();
+ return put_user(i, argp);
+
+ case WDIOC_GETBOOTSTATUS:
+ i = wdrtas_get_boot_status();
+ return put_user(i, argp);
+
+ case WDIOC_GETTEMP:
+ if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE)
+ return -EOPNOTSUPP;
+
+ i = wdrtas_get_temperature();
+ return put_user(i, argp);
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(i, argp))
+ return -EFAULT;
+ if (i & WDIOS_DISABLECARD)
+ wdrtas_timer_stop();
+ if (i & WDIOS_ENABLECARD) {
+ wdrtas_timer_keepalive();
+ wdrtas_timer_start();
+ }
+ if (i & WDIOS_TEMPPANIC) {
+ /* not implemented. Done by H8 */
+ }
+ return 0;
+
+ case WDIOC_KEEPALIVE:
+ wdrtas_timer_keepalive();
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(i, argp))
+ return -EFAULT;
+
+ if (wdrtas_set_interval(i))
+ return -EINVAL;
+
+ wdrtas_timer_keepalive();
+
+ if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE)
+ wdrtas_interval = i;
+ else
+ wdrtas_interval = wdrtas_get_interval(i);
+ /* fallthrough */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdrtas_interval, argp);
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+/**
+ * wdrtas_open - open function of watchdog device
+ * @inode: inode structure
+ * @file: file structure
+ *
+ * returns 0 on success, -EBUSY if the file has been opened already, <0 on
+ * other failures
+ *
+ * function called when watchdog device is opened
+ */
+static int
+wdrtas_open(struct inode *inode, struct file *file)
+{
+ /* only open once */
+ if (atomic_inc_return(&wdrtas_miscdev_open) > 1) {
+ atomic_dec(&wdrtas_miscdev_open);
+ return -EBUSY;
+ }
+
+ wdrtas_timer_start();
+ wdrtas_timer_keepalive();
+
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdrtas_close - close function of watchdog device
+ * @inode: inode structure
+ * @file: file structure
+ *
+ * returns 0 on success
+ *
+ * close function. Always succeeds
+ */
+static int
+wdrtas_close(struct inode *inode, struct file *file)
+{
+ /* only stop watchdog, if this was announced using 'V' before */
+ if (wdrtas_expect_close == WDRTAS_MAGIC_CHAR)
+ wdrtas_timer_stop();
+ else {
+ printk(KERN_WARNING "wdrtas: got unexpected close. Watchdog "
+ "not stopped.\n");
+ wdrtas_timer_keepalive();
+ }
+
+ wdrtas_expect_close = 0;
+ atomic_dec(&wdrtas_miscdev_open);
+ return 0;
+}
+
+/**
+ * wdrtas_temp_read - gives back the temperature in fahrenheit
+ * @file: file structure
+ * @buf: user buffer
+ * @count: number of bytes to be read
+ * @ppos: position in file
+ *
+ * returns always 1 or -EFAULT in case of user space copy failures, <0 on
+ * other failures
+ *
+ * wdrtas_temp_read gives the temperature to the users by copying this
+ * value as one byte into the user space buffer. The unit is Fahrenheit...
+ */
+static ssize_t
+wdrtas_temp_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ int temperature = 0;
+
+ temperature = wdrtas_get_temperature();
+ if (temperature < 0)
+ return temperature;
+
+ if (copy_to_user(buf, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+/**
+ * wdrtas_temp_open - open function of temperature device
+ * @inode: inode structure
+ * @file: file structure
+ *
+ * returns 0 on success, <0 on failure
+ *
+ * function called when temperature device is opened
+ */
+static int
+wdrtas_temp_open(struct inode *inode, struct file *file)
+{
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdrtas_temp_close - close function of temperature device
+ * @inode: inode structure
+ * @file: file structure
+ *
+ * returns 0 on success
+ *
+ * close function. Always succeeds
+ */
+static int
+wdrtas_temp_close(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/**
+ * wdrtas_reboot - reboot notifier function
+ * @nb: notifier block structure
+ * @code: reboot code
+ * @ptr: unused
+ *
+ * returns NOTIFY_DONE
+ *
+ * wdrtas_reboot stops the watchdog in case of a reboot
+ */
+static int
+wdrtas_reboot(struct notifier_block *this, unsigned long code, void *ptr)
+{
+ if ( (code==SYS_DOWN) || (code==SYS_HALT) )
+ wdrtas_timer_stop();
+
+ return NOTIFY_DONE;
+}
+
+/*** initialization stuff */
+
+static const struct file_operations wdrtas_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdrtas_write,
+ .ioctl = wdrtas_ioctl,
+ .open = wdrtas_open,
+ .release = wdrtas_close,
+};
+
+static struct miscdevice wdrtas_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdrtas_fops,
+};
+
+static const struct file_operations wdrtas_temp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = wdrtas_temp_read,
+ .open = wdrtas_temp_open,
+ .release = wdrtas_temp_close,
+};
+
+static struct miscdevice wdrtas_tempdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &wdrtas_temp_fops,
+};
+
+static struct notifier_block wdrtas_notifier = {
+ .notifier_call = wdrtas_reboot,
+};
+
+/**
+ * wdrtas_get_tokens - reads in RTAS tokens
+ *
+ * returns 0 on succes, <0 on failure
+ *
+ * wdrtas_get_tokens reads in the tokens for the RTAS calls used in
+ * this watchdog driver. It tolerates, if "get-sensor-state" and
+ * "ibm,get-system-parameter" are not available.
+ */
+static int
+wdrtas_get_tokens(void)
+{
+ wdrtas_token_get_sensor_state = rtas_token("get-sensor-state");
+ if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_WARNING "wdrtas: couldn't get token for "
+ "get-sensor-state. Trying to continue without "
+ "temperature support.\n");
+ }
+
+ wdrtas_token_get_sp = rtas_token("ibm,get-system-parameter");
+ if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_WARNING "wdrtas: couldn't get token for "
+ "ibm,get-system-parameter. Trying to continue with "
+ "a default timeout value of %i seconds.\n",
+ WDRTAS_DEFAULT_INTERVAL);
+ }
+
+ wdrtas_token_set_indicator = rtas_token("set-indicator");
+ if (wdrtas_token_set_indicator == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_ERR "wdrtas: couldn't get token for "
+ "set-indicator. Terminating watchdog code.\n");
+ return -EIO;
+ }
+
+ wdrtas_token_event_scan = rtas_token("event-scan");
+ if (wdrtas_token_event_scan == RTAS_UNKNOWN_SERVICE) {
+ printk(KERN_ERR "wdrtas: couldn't get token for event-scan. "
+ "Terminating watchdog code.\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+/**
+ * wdrtas_unregister_devs - unregisters the misc dev handlers
+ *
+ * wdrtas_register_devs unregisters the watchdog and temperature watchdog
+ * misc devs
+ */
+static void
+wdrtas_unregister_devs(void)
+{
+ misc_deregister(&wdrtas_miscdev);
+ if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE)
+ misc_deregister(&wdrtas_tempdev);
+}
+
+/**
+ * wdrtas_register_devs - registers the misc dev handlers
+ *
+ * returns 0 on succes, <0 on failure
+ *
+ * wdrtas_register_devs registers the watchdog and temperature watchdog
+ * misc devs
+ */
+static int
+wdrtas_register_devs(void)
+{
+ int result;
+
+ result = misc_register(&wdrtas_miscdev);
+ if (result) {
+ printk(KERN_ERR "wdrtas: couldn't register watchdog misc "
+ "device. Terminating watchdog code.\n");
+ return result;
+ }
+
+ if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE) {
+ result = misc_register(&wdrtas_tempdev);
+ if (result) {
+ printk(KERN_WARNING "wdrtas: couldn't register "
+ "watchdog temperature misc device. Continuing "
+ "without temperature support.\n");
+ wdrtas_token_get_sensor_state = RTAS_UNKNOWN_SERVICE;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * wdrtas_init - init function of the watchdog driver
+ *
+ * returns 0 on succes, <0 on failure
+ *
+ * registers the file handlers and the reboot notifier
+ */
+static int __init
+wdrtas_init(void)
+{
+ if (wdrtas_get_tokens())
+ return -ENODEV;
+
+ if (wdrtas_register_devs())
+ return -ENODEV;
+
+ if (register_reboot_notifier(&wdrtas_notifier)) {
+ printk(KERN_ERR "wdrtas: could not register reboot notifier. "
+ "Terminating watchdog code.\n");
+ wdrtas_unregister_devs();
+ return -ENODEV;
+ }
+
+ if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE)
+ wdrtas_interval = WDRTAS_DEFAULT_INTERVAL;
+ else
+ wdrtas_interval = wdrtas_get_interval(WDRTAS_DEFAULT_INTERVAL);
+
+ return 0;
+}
+
+/**
+ * wdrtas_exit - exit function of the watchdog driver
+ *
+ * unregisters the file handlers and the reboot notifier
+ */
+static void __exit
+wdrtas_exit(void)
+{
+ if (!wdrtas_nowayout)
+ wdrtas_timer_stop();
+
+ wdrtas_unregister_devs();
+
+ unregister_reboot_notifier(&wdrtas_notifier);
+}
+
+module_init(wdrtas_init);
+module_exit(wdrtas_exit);
--- /dev/null
+/*
+ * Industrial Computer Source WDT500/501 driver
+ *
+ * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Release 0.10.
+ *
+ * Fixes
+ * Dave Gregorich : Modularisation and minor bugs
+ * Alan Cox : Added the watchdog ioctl() stuff
+ * Alan Cox : Fixed the reboot problem (as noted by
+ * Matt Crocker).
+ * Alan Cox : Added wdt= boot option
+ * Alan Cox : Cleaned up copy/user stuff
+ * Tim Hockin : Added insmod parameters, comment cleanup
+ * Parameterized timeout
+ * Tigran Aivazian : Restructured wdt_init() to handle failures
+ * Joel Becker : Added WDIOC_GET/SETTIMEOUT
+ * Matt Domsch : Added nowayout module option
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include "wd501p.h"
+
+static unsigned long wdt_is_open;
+static char expect_close;
+
+/*
+ * Module parameters
+ */
+
+#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
+
+static int heartbeat = WD_TIMO;
+static int wd_heartbeat;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/* You must set these - there is no sane way to probe for this board. */
+static int io=0x240;
+static int irq=11;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "WDT io port (default=0x240)");
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "WDT irq (default=11)");
+
+#ifdef CONFIG_WDT_501
+/* Support for the Fan Tachometer on the WDT501-P */
+static int tachometer;
+
+module_param(tachometer, int, 0);
+MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)");
+#endif /* CONFIG_WDT_501 */
+
+/*
+ * Programming support
+ */
+
+static void wdt_ctr_mode(int ctr, int mode)
+{
+ ctr<<=6;
+ ctr|=0x30;
+ ctr|=(mode<<1);
+ outb_p(ctr, WDT_CR);
+}
+
+static void wdt_ctr_load(int ctr, int val)
+{
+ outb_p(val&0xFF, WDT_COUNT0+ctr);
+ outb_p(val>>8, WDT_COUNT0+ctr);
+}
+
+/**
+ * wdt_start:
+ *
+ * Start the watchdog driver.
+ */
+
+static int wdt_start(void)
+{
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
+ wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
+ wdt_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
+ wdt_ctr_load(0, 8948); /* Count at 100Hz */
+ wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
+ wdt_ctr_load(2,65535); /* Length of reset pulse */
+ outb_p(0, WDT_DC); /* Enable watchdog */
+ return 0;
+}
+
+/**
+ * wdt_stop:
+ *
+ * Stop the watchdog driver.
+ */
+
+static int wdt_stop (void)
+{
+ /* Turn the card off */
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdt_ctr_load(2,0); /* 0 length reset pulses now */
+ return 0;
+}
+
+/**
+ * wdt_ping:
+ *
+ * Reload counter one with the watchdog heartbeat. We don't bother reloading
+ * the cascade counter.
+ */
+
+static int wdt_ping(void)
+{
+ /* Write a watchdog value */
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
+ wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
+ outb_p(0, WDT_DC); /* Enable watchdog */
+ return 0;
+}
+
+/**
+ * wdt_set_heartbeat:
+ * @t: the new heartbeat value that needs to be set.
+ *
+ * Set a new heartbeat value for the watchdog device. If the heartbeat value is
+ * incorrect we keep the old value and return -EINVAL. If successfull we
+ * return 0.
+ */
+static int wdt_set_heartbeat(int t)
+{
+ if ((t < 1) || (t > 65535))
+ return -EINVAL;
+
+ heartbeat = t;
+ wd_heartbeat = t * 100;
+ return 0;
+}
+
+/**
+ * wdt_get_status:
+ * @status: the new status.
+ *
+ * Extract the status information from a WDT watchdog device. There are
+ * several board variants so we have to know which bits are valid. Some
+ * bits default to one and some to zero in order to be maximally painful.
+ *
+ * we then map the bits onto the status ioctl flags.
+ */
+
+static int wdt_get_status(int *status)
+{
+ unsigned char new_status=inb_p(WDT_SR);
+
+ *status=0;
+ if (new_status & WDC_SR_ISOI0)
+ *status |= WDIOF_EXTERN1;
+ if (new_status & WDC_SR_ISII1)
+ *status |= WDIOF_EXTERN2;
+#ifdef CONFIG_WDT_501
+ if (!(new_status & WDC_SR_TGOOD))
+ *status |= WDIOF_OVERHEAT;
+ if (!(new_status & WDC_SR_PSUOVER))
+ *status |= WDIOF_POWEROVER;
+ if (!(new_status & WDC_SR_PSUUNDR))
+ *status |= WDIOF_POWERUNDER;
+ if (tachometer) {
+ if (!(new_status & WDC_SR_FANGOOD))
+ *status |= WDIOF_FANFAULT;
+ }
+#endif /* CONFIG_WDT_501 */
+ return 0;
+}
+
+#ifdef CONFIG_WDT_501
+/**
+ * wdt_get_temperature:
+ *
+ * Reports the temperature in degrees Fahrenheit. The API is in
+ * farenheit. It was designed by an imperial measurement luddite.
+ */
+
+static int wdt_get_temperature(int *temperature)
+{
+ unsigned short c=inb_p(WDT_RT);
+
+ *temperature = (c * 11 / 15) + 7;
+ return 0;
+}
+#endif /* CONFIG_WDT_501 */
+
+/**
+ * wdt_interrupt:
+ * @irq: Interrupt number
+ * @dev_id: Unused as we don't allow multiple devices.
+ *
+ * Handle an interrupt from the board. These are raised when the status
+ * map changes in what the board considers an interesting way. That means
+ * a failure condition occurring.
+ */
+
+static irqreturn_t wdt_interrupt(int irq, void *dev_id)
+{
+ /*
+ * Read the status register see what is up and
+ * then printk it.
+ */
+ unsigned char status=inb_p(WDT_SR);
+
+ printk(KERN_CRIT "WDT status %d\n", status);
+
+#ifdef CONFIG_WDT_501
+ if (!(status & WDC_SR_TGOOD))
+ printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
+ if (!(status & WDC_SR_PSUOVER))
+ printk(KERN_CRIT "PSU over voltage.\n");
+ if (!(status & WDC_SR_PSUUNDR))
+ printk(KERN_CRIT "PSU under voltage.\n");
+ if (tachometer) {
+ if (!(status & WDC_SR_FANGOOD))
+ printk(KERN_CRIT "Possible fan fault.\n");
+ }
+#endif /* CONFIG_WDT_501 */
+ if (!(status & WDC_SR_WCCR))
+#ifdef SOFTWARE_REBOOT
+#ifdef ONLY_TESTING
+ printk(KERN_CRIT "Would Reboot.\n");
+#else
+ printk(KERN_CRIT "Initiating system reboot.\n");
+ emergency_restart();
+#endif
+#else
+ printk(KERN_CRIT "Reset in 5ms.\n");
+#endif
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * wdt_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if(count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ wdt_ping();
+ }
+ return count;
+}
+
+/**
+ * wdt_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features. We only actually usefully support
+ * querying capabilities and current status.
+ */
+
+static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int new_heartbeat;
+ int status;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT|
+ WDIOF_MAGICCLOSE|
+ WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = "WDT500/501",
+ };
+
+ /* Add options according to the card we have */
+ ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
+#ifdef CONFIG_WDT_501
+ ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
+ if (tachometer)
+ ident.options |= WDIOF_FANFAULT;
+#endif /* CONFIG_WDT_501 */
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+
+ case WDIOC_GETSTATUS:
+ wdt_get_status(&status);
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ wdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ }
+}
+
+/**
+ * wdt_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * The watchdog device has been opened. The watchdog device is single
+ * open and on opening we load the counters. Counter zero is a 100Hz
+ * cascade, into counter 1 which downcounts to reboot. When the counter
+ * triggers counter 2 downcounts the length of the reset pulse which
+ * set set to be as long as possible.
+ */
+
+static int wdt_open(struct inode *inode, struct file *file)
+{
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
+ /*
+ * Activate
+ */
+ wdt_start();
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdt_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int wdt_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ wdt_stop();
+ clear_bit(0, &wdt_is_open);
+ } else {
+ printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
+ wdt_ping();
+ }
+ expect_close = 0;
+ return 0;
+}
+
+#ifdef CONFIG_WDT_501
+/**
+ * wdt_temp_read:
+ * @file: file handle to the watchdog board
+ * @buf: buffer to write 1 byte into
+ * @count: length of buffer
+ * @ptr: offset (no seek allowed)
+ *
+ * Temp_read reports the temperature in degrees Fahrenheit. The API is in
+ * farenheit. It was designed by an imperial measurement luddite.
+ */
+
+static ssize_t wdt_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
+{
+ int temperature;
+
+ if (wdt_get_temperature(&temperature))
+ return -EFAULT;
+
+ if (copy_to_user (buf, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+/**
+ * wdt_temp_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * The temperature device has been opened.
+ */
+
+static int wdt_temp_open(struct inode *inode, struct file *file)
+{
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdt_temp_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The temperature device has been closed.
+ */
+
+static int wdt_temp_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+#endif /* CONFIG_WDT_501 */
+
+/**
+ * notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the card off */
+ wdt_stop();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+
+static const struct file_operations wdt_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt_write,
+ .ioctl = wdt_ioctl,
+ .open = wdt_open,
+ .release = wdt_release,
+};
+
+static struct miscdevice wdt_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
+};
+
+#ifdef CONFIG_WDT_501
+static const struct file_operations wdt_temp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = wdt_temp_read,
+ .open = wdt_temp_open,
+ .release = wdt_temp_release,
+};
+
+static struct miscdevice temp_miscdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &wdt_temp_fops,
+};
+#endif /* CONFIG_WDT_501 */
+
+/*
+ * The WDT card needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdt_notifier = {
+ .notifier_call = wdt_notify_sys,
+};
+
+/**
+ * cleanup_module:
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static void __exit wdt_exit(void)
+{
+ misc_deregister(&wdt_miscdev);
+#ifdef CONFIG_WDT_501
+ misc_deregister(&temp_miscdev);
+#endif /* CONFIG_WDT_501 */
+ unregister_reboot_notifier(&wdt_notifier);
+ free_irq(irq, NULL);
+ release_region(io,8);
+}
+
+/**
+ * wdt_init:
+ *
+ * Set up the WDT watchdog board. All we have to do is grab the
+ * resources we require and bitch if anyone beat us to them.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init wdt_init(void)
+{
+ int ret;
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (wdt_set_heartbeat(heartbeat)) {
+ wdt_set_heartbeat(WD_TIMO);
+ printk(KERN_INFO "wdt: heartbeat value must be 0<heartbeat<65536, using %d\n",
+ WD_TIMO);
+ }
+
+ if (!request_region(io, 8, "wdt501p")) {
+ printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
+ if(ret) {
+ printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
+ goto outreg;
+ }
+
+ ret = register_reboot_notifier(&wdt_notifier);
+ if(ret) {
+ printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
+ goto outirq;
+ }
+
+#ifdef CONFIG_WDT_501
+ ret = misc_register(&temp_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
+ goto outrbt;
+ }
+#endif /* CONFIG_WDT_501 */
+
+ ret = misc_register(&wdt_miscdev);
+ if (ret) {
+ printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto outmisc;
+ }
+
+ ret = 0;
+ printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
+ io, irq, heartbeat, nowayout);
+#ifdef CONFIG_WDT_501
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
+#endif /* CONFIG_WDT_501 */
+
+out:
+ return ret;
+
+outmisc:
+#ifdef CONFIG_WDT_501
+ misc_deregister(&temp_miscdev);
+outrbt:
+#endif /* CONFIG_WDT_501 */
+ unregister_reboot_notifier(&wdt_notifier);
+outirq:
+ free_irq(irq, NULL);
+outreg:
+ release_region(io,8);
+ goto out;
+}
+
+module_init(wdt_init);
+module_exit(wdt_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Driver for ISA ICS watchdog cards (WDT500/501)");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Intel 21285 watchdog driver
+ * Copyright (c) Phil Blundell <pb@nexus.co.uk>, 1998
+ *
+ * based on
+ *
+ * SoftDog 0.05: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/hardware/dec21285.h>
+
+/*
+ * Define this to stop the watchdog actually rebooting the machine.
+ */
+#undef ONLY_TESTING
+
+static unsigned int soft_margin = 60; /* in seconds */
+static unsigned int reload;
+static unsigned long timer_alive;
+
+#ifdef ONLY_TESTING
+/*
+ * If the timer expires..
+ */
+static void watchdog_fire(int irq, void *dev_id)
+{
+ printk(KERN_CRIT "Watchdog: Would Reboot.\n");
+ *CSR_TIMER4_CNTL = 0;
+ *CSR_TIMER4_CLR = 0;
+}
+#endif
+
+/*
+ * Refresh the timer.
+ */
+static void watchdog_ping(void)
+{
+ *CSR_TIMER4_LOAD = reload;
+}
+
+/*
+ * Allow only one person to hold it open
+ */
+static int watchdog_open(struct inode *inode, struct file *file)
+{
+ int ret;
+
+ if (*CSR_SA110_CNTL & (1 << 13))
+ return -EBUSY;
+
+ if (test_and_set_bit(1, &timer_alive))
+ return -EBUSY;
+
+ reload = soft_margin * (mem_fclk_21285 / 256);
+
+ *CSR_TIMER4_CLR = 0;
+ watchdog_ping();
+ *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_AUTORELOAD
+ | TIMER_CNTL_DIV256;
+
+#ifdef ONLY_TESTING
+ ret = request_irq(IRQ_TIMER4, watchdog_fire, 0, "watchdog", NULL);
+ if (ret) {
+ *CSR_TIMER4_CNTL = 0;
+ clear_bit(1, &timer_alive);
+ }
+#else
+ /*
+ * Setting this bit is irreversible; once enabled, there is
+ * no way to disable the watchdog.
+ */
+ *CSR_SA110_CNTL |= 1 << 13;
+
+ ret = 0;
+#endif
+ nonseekable_open(inode, file);
+ return ret;
+}
+
+/*
+ * Shut off the timer.
+ * Note: if we really have enabled the watchdog, there
+ * is no way to turn off.
+ */
+static int watchdog_release(struct inode *inode, struct file *file)
+{
+#ifdef ONLY_TESTING
+ free_irq(IRQ_TIMER4, NULL);
+ clear_bit(1, &timer_alive);
+#endif
+ return 0;
+}
+
+static ssize_t
+watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+{
+ /*
+ * Refresh the timer.
+ */
+ if (len)
+ watchdog_ping();
+
+ return len;
+}
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT,
+ .identity = "Footbridge Watchdog",
+};
+
+static int
+watchdog_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ unsigned int new_margin;
+ int ret = -ENOTTY;
+
+ switch(cmd) {
+ case WDIOC_GETSUPPORT:
+ ret = 0;
+ if (copy_to_user((void *)arg, &ident, sizeof(ident)))
+ ret = -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ ret = put_user(0,(int *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ watchdog_ping();
+ ret = 0;
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ ret = get_user(new_margin, (int *)arg);
+ if (ret)
+ break;
+
+ /* Arbitrary, can't find the card's limits */
+ if (new_margin < 0 || new_margin > 60) {
+ ret = -EINVAL;
+ break;
+ }
+
+ soft_margin = new_margin;
+ reload = soft_margin * (mem_fclk_21285 / 256);
+ watchdog_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ ret = put_user(soft_margin, (int *)arg);
+ break;
+ }
+ return ret;
+}
+
+static const struct file_operations watchdog_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = watchdog_write,
+ .ioctl = watchdog_ioctl,
+ .open = watchdog_open,
+ .release = watchdog_release,
+};
+
+static struct miscdevice watchdog_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &watchdog_fops,
+};
+
+static int __init footbridge_watchdog_init(void)
+{
+ int retval;
+
+ if (machine_is_netwinder())
+ return -ENODEV;
+
+ retval = misc_register(&watchdog_miscdev);
+ if (retval < 0)
+ return retval;
+
+ printk("Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
+ soft_margin);
+
+ if (machine_is_cats())
+ printk("Warning: Watchdog reset may not work on this machine.\n");
+ return 0;
+}
+
+static void __exit footbridge_watchdog_exit(void)
+{
+ misc_deregister(&watchdog_miscdev);
+}
+
+MODULE_AUTHOR("Phil Blundell <pb@nexus.co.uk>");
+MODULE_DESCRIPTION("Footbridge watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(soft_margin, int, 0);
+MODULE_PARM_DESC(soft_margin,"Watchdog timeout in seconds");
+
+module_init(footbridge_watchdog_init);
+module_exit(footbridge_watchdog_exit);
--- /dev/null
+/*
+ * Wdt977 0.04: A Watchdog Device for Netwinder W83977AF chip
+ *
+ * (c) Copyright 1998 Rebel.com (Woody Suwalski <woody@netwinder.org>)
+ *
+ * -----------------------
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * -----------------------
+ * 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
+ * Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ * 19-Dec-2001 Woody Suwalski: Netwinder fixes, ioctl interface
+ * 06-Jan-2002 Woody Suwalski: For compatibility, convert all timeouts
+ * from minutes to seconds.
+ * 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
+ * nwwatchdog_init.
+ * 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
+ * remove limitiation to be used on Netwinders only
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/watchdog.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/mach-types.h>
+#include <asm/uaccess.h>
+
+#define WATCHDOG_VERSION "0.04"
+#define WATCHDOG_NAME "Wdt977"
+#define PFX WATCHDOG_NAME ": "
+#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
+
+#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
+#define IO_DATA_PORT (IO_INDEX_PORT+1)
+
+#define UNLOCK_DATA 0x87
+#define LOCK_DATA 0xAA
+#define DEVICE_REGISTER 0x07
+
+
+#define DEFAULT_TIMEOUT 60 /* default timeout in seconds */
+
+static int timeout = DEFAULT_TIMEOUT;
+static int timeoutM; /* timeout in minutes */
+static unsigned long timer_alive;
+static int testmode;
+static char expect_close;
+static spinlock_t spinlock;
+
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
+module_param(testmode, int, 0);
+MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+/*
+ * Start the watchdog
+ */
+
+static int wdt977_start(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+
+ /* select device Aux2 (device=8) and set watchdog regs F2, F3 and F4
+ * F2 has the timeout in minutes
+ * F3 could be set to the POWER LED blink (with GP17 set to PowerLed)
+ * at timeout, and to reset timer on kbd/mouse activity (not impl.)
+ * F4 is used to just clear the TIMEOUT'ed state (bit 0)
+ */
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutM, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+
+ /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
+ /* in test mode watch the bit 1 on F4 to indicate "triggered" */
+ if (!testmode)
+ {
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ }
+
+ /* lock the SuperIO chip */
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+ printk(KERN_INFO PFX "activated.\n");
+
+ return 0;
+}
+
+/*
+ * Stop the watchdog
+ */
+
+static int wdt977_stop(void)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+
+ /* select device Aux2 (device=8) and set watchdog regs F2,F3 and F4
+ * F3 is reset to its default state
+ * F4 can clear the TIMEOUT'ed state (bit 0) - back to default
+ * We can not use GP17 as a PowerLed, as we use its usage as a RedLed
+ */
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0xFF, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+
+ /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+
+ /* lock the SuperIO chip */
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+ printk(KERN_INFO PFX "shutdown.\n");
+
+ return 0;
+}
+
+/*
+ * Send a keepalive ping to the watchdog
+ * This is done by simply re-writing the timeout to reg. 0xF2
+ */
+
+static int wdt977_keepalive(void)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+
+ /* select device Aux2 (device=8) and kicks watchdog reg F2 */
+ /* F2 has the timeout in minutes */
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutM, IO_DATA_PORT);
+
+ /* lock the SuperIO chip */
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ return 0;
+}
+
+/*
+ * Set the watchdog timeout value
+ */
+
+static int wdt977_set_timeout(int t)
+{
+ int tmrval;
+
+ /* convert seconds to minutes, rounding up */
+ tmrval = (t + 59) / 60;
+
+ if (machine_is_netwinder()) {
+ /* we have a hw bug somewhere, so each 977 minute is actually only 30sec
+ * this limits the max timeout to half of device max of 255 minutes...
+ */
+ tmrval += tmrval;
+ }
+
+ if ((tmrval < 1) || (tmrval > 255))
+ return -EINVAL;
+
+ /* timeout is the timeout in seconds, timeoutM is the timeout in minutes) */
+ timeout = t;
+ timeoutM = tmrval;
+ return 0;
+}
+
+/*
+ * Get the watchdog status
+ */
+
+static int wdt977_get_status(int *status)
+{
+ int new_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&spinlock, flags);
+
+ /* unlock the SuperIO chip */
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+
+ /* select device Aux2 (device=8) and read watchdog reg F4 */
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ new_status = inb_p(IO_DATA_PORT);
+
+ /* lock the SuperIO chip */
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
+
+ spin_unlock_irqrestore(&spinlock, flags);
+
+ *status=0;
+ if (new_status & 1)
+ *status |= WDIOF_CARDRESET;
+
+ return 0;
+}
+
+
+/*
+ * /dev/watchdog handling
+ */
+
+static int wdt977_open(struct inode *inode, struct file *file)
+{
+ /* If the watchdog is alive we don't need to start it again */
+ if( test_and_set_bit(0,&timer_alive) )
+ return -EBUSY;
+
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ wdt977_start();
+ return nonseekable_open(inode, file);
+}
+
+static int wdt977_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ * Lock it in if it's a module and we set nowayout
+ */
+ if (expect_close == 42)
+ {
+ wdt977_stop();
+ clear_bit(0,&timer_alive);
+ } else {
+ wdt977_keepalive();
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ }
+ expect_close = 0;
+ return 0;
+}
+
+
+/*
+ * wdt977_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t wdt977_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (count)
+ {
+ if (!nowayout)
+ {
+ size_t i;
+
+ /* In case it was set long ago */
+ expect_close = 0;
+
+ for (i = 0; i != count; i++)
+ {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+
+ /* someone wrote to us, we should restart timer */
+ wdt977_keepalive();
+ }
+ return count;
+}
+
+/*
+ * wdt977_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features.
+ */
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE |
+ WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = WATCHDOG_NAME,
+};
+
+static int wdt977_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ int status;
+ int new_options, retval = -EINVAL;
+ int new_timeout;
+ union {
+ struct watchdog_info __user *ident;
+ int __user *i;
+ } uarg;
+
+ uarg.i = (int __user *)arg;
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+
+ case WDIOC_GETSTATUS:
+ wdt977_get_status(&status);
+ return put_user(status, uarg.i);
+
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+
+ case WDIOC_KEEPALIVE:
+ wdt977_keepalive();
+ return 0;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user (new_options, uarg.i))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt977_stop();
+ retval = 0;
+ }
+
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt977_start();
+ retval = 0;
+ }
+
+ return retval;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+
+ if (wdt977_set_timeout(new_timeout))
+ return -EINVAL;
+
+ wdt977_keepalive();
+ /* Fall */
+
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, uarg.i);
+
+ }
+}
+
+static int wdt977_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if(code==SYS_DOWN || code==SYS_HALT)
+ wdt977_stop();
+ return NOTIFY_DONE;
+}
+
+static const struct file_operations wdt977_fops=
+{
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdt977_write,
+ .ioctl = wdt977_ioctl,
+ .open = wdt977_open,
+ .release = wdt977_release,
+};
+
+static struct miscdevice wdt977_miscdev=
+{
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt977_fops,
+};
+
+static struct notifier_block wdt977_notifier = {
+ .notifier_call = wdt977_notify_sys,
+};
+
+static int __init wd977_init(void)
+{
+ int rc;
+
+ //if (!machine_is_netwinder())
+ // return -ENODEV;
+
+ printk(KERN_INFO PFX DRIVER_VERSION);
+
+ spin_lock_init(&spinlock);
+
+ /* Check that the timeout value is within it's range ; if not reset to the default */
+ if (wdt977_set_timeout(timeout))
+ {
+ wdt977_set_timeout(DEFAULT_TIMEOUT);
+ printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n",
+ DEFAULT_TIMEOUT);
+ }
+
+ /* on Netwinder the IOports are already reserved by
+ * arch/arm/mach-footbridge/netwinder-hw.c
+ */
+ if (!machine_is_netwinder())
+ {
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ IO_INDEX_PORT);
+ rc = -EIO;
+ goto err_out;
+ }
+ }
+
+ rc = misc_register(&wdt977_miscdev);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt977_miscdev.minor, rc);
+ goto err_out_region;
+ }
+
+ rc = register_reboot_notifier(&wdt977_notifier);
+ if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
+ goto err_out_miscdev;
+ }
+
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
+ timeout, nowayout, testmode);
+
+ return 0;
+
+err_out_miscdev:
+ misc_deregister(&wdt977_miscdev);
+err_out_region:
+ if (!machine_is_netwinder())
+ release_region(IO_INDEX_PORT,2);
+err_out:
+ return rc;
+}
+
+static void __exit wd977_exit(void)
+{
+ wdt977_stop();
+ misc_deregister(&wdt977_miscdev);
+ unregister_reboot_notifier(&wdt977_notifier);
+ release_region(IO_INDEX_PORT,2);
+}
+
+module_init(wd977_init);
+module_exit(wd977_exit);
+
+MODULE_AUTHOR("Woody Suwalski <woodys@xandros.com>");
+MODULE_DESCRIPTION("W83977AF Watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
--- /dev/null
+/*
+ * Industrial Computer Source PCI-WDT500/501 driver
+ *
+ * (c) Copyright 1996-1997 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Release 0.10.
+ *
+ * Fixes
+ * Dave Gregorich : Modularisation and minor bugs
+ * Alan Cox : Added the watchdog ioctl() stuff
+ * Alan Cox : Fixed the reboot problem (as noted by
+ * Matt Crocker).
+ * Alan Cox : Added wdt= boot option
+ * Alan Cox : Cleaned up copy/user stuff
+ * Tim Hockin : Added insmod parameters, comment cleanup
+ * Parameterized timeout
+ * JP Nollmann : Added support for PCI wdt501p
+ * Alan Cox : Split ISA and PCI cards into two drivers
+ * Jeff Garzik : PCI cleanups
+ * Tigran Aivazian : Restructured wdtpci_init_one() to handle failures
+ * Joel Becker : Added WDIOC_GET/SETTIMEOUT
+ * Zwane Mwaikambo : Magic char closing, locking changes, cleanups
+ * Matt Domsch : nowayout module option
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/ioport.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/pci.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#define WDT_IS_PCI
+#include "wd501p.h"
+
+#define PFX "wdt_pci: "
+
+/*
+ * Until Access I/O gets their application for a PCI vendor ID approved,
+ * I don't think that it's appropriate to move these constants into the
+ * regular pci_ids.h file. -- JPN 2000/01/18
+ */
+
+#ifndef PCI_VENDOR_ID_ACCESSIO
+#define PCI_VENDOR_ID_ACCESSIO 0x494f
+#endif
+#ifndef PCI_DEVICE_ID_WDG_CSM
+#define PCI_DEVICE_ID_WDG_CSM 0x22c0
+#endif
+
+/* We can only use 1 card due to the /dev/watchdog restriction */
+static int dev_count;
+
+static struct semaphore open_sem;
+static spinlock_t wdtpci_lock;
+static char expect_close;
+
+static int io;
+static int irq;
+
+/* Default timeout */
+#define WD_TIMO 60 /* Default heartbeat = 60 seconds */
+
+static int heartbeat = WD_TIMO;
+static int wd_heartbeat;
+module_param(heartbeat, int, 0);
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#ifdef CONFIG_WDT_501_PCI
+/* Support for the Fan Tachometer on the PCI-WDT501 */
+static int tachometer;
+
+module_param(tachometer, int, 0);
+MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
+#endif /* CONFIG_WDT_501_PCI */
+
+/*
+ * Programming support
+ */
+
+static void wdtpci_ctr_mode(int ctr, int mode)
+{
+ ctr<<=6;
+ ctr|=0x30;
+ ctr|=(mode<<1);
+ outb_p(ctr, WDT_CR);
+}
+
+static void wdtpci_ctr_load(int ctr, int val)
+{
+ outb_p(val&0xFF, WDT_COUNT0+ctr);
+ outb_p(val>>8, WDT_COUNT0+ctr);
+}
+
+/**
+ * wdtpci_start:
+ *
+ * Start the watchdog driver.
+ */
+
+static int wdtpci_start(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdtpci_lock, flags);
+
+ /*
+ * "pet" the watchdog, as Access says.
+ * This resets the clock outputs.
+ */
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdtpci_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
+ outb_p(0, WDT_DC); /* Enable watchdog */
+
+ inb_p(WDT_DC); /* Disable watchdog */
+ outb_p(0, WDT_CLOCK); /* 2.0833MHz clock */
+ inb_p(WDT_BUZZER); /* disable */
+ inb_p(WDT_OPTONOTRST); /* disable */
+ inb_p(WDT_OPTORST); /* disable */
+ inb_p(WDT_PROGOUT); /* disable */
+ wdtpci_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
+ wdtpci_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
+ wdtpci_ctr_mode(2,1); /* Program CTR2 for Mode 1: Retriggerable One-Shot */
+ wdtpci_ctr_load(0,20833); /* count at 100Hz */
+ wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
+ /* DO NOT LOAD CTR2 on PCI card! -- JPN */
+ outb_p(0, WDT_DC); /* Enable watchdog */
+
+ spin_unlock_irqrestore(&wdtpci_lock, flags);
+ return 0;
+}
+
+/**
+ * wdtpci_stop:
+ *
+ * Stop the watchdog driver.
+ */
+
+static int wdtpci_stop (void)
+{
+ unsigned long flags;
+
+ /* Turn the card off */
+ spin_lock_irqsave(&wdtpci_lock, flags);
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdtpci_ctr_load(2,0); /* 0 length reset pulses now */
+ spin_unlock_irqrestore(&wdtpci_lock, flags);
+ return 0;
+}
+
+/**
+ * wdtpci_ping:
+ *
+ * Reload counter one with the watchdog heartbeat. We don't bother reloading
+ * the cascade counter.
+ */
+
+static int wdtpci_ping(void)
+{
+ unsigned long flags;
+
+ /* Write a watchdog value */
+ spin_lock_irqsave(&wdtpci_lock, flags);
+ inb_p(WDT_DC); /* Disable watchdog */
+ wdtpci_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
+ wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
+ outb_p(0, WDT_DC); /* Enable watchdog */
+ spin_unlock_irqrestore(&wdtpci_lock, flags);
+ return 0;
+}
+
+/**
+ * wdtpci_set_heartbeat:
+ * @t: the new heartbeat value that needs to be set.
+ *
+ * Set a new heartbeat value for the watchdog device. If the heartbeat value is
+ * incorrect we keep the old value and return -EINVAL. If successfull we
+ * return 0.
+ */
+static int wdtpci_set_heartbeat(int t)
+{
+ /* Arbitrary, can't find the card's limits */
+ if ((t < 1) || (t > 65535))
+ return -EINVAL;
+
+ heartbeat = t;
+ wd_heartbeat = t * 100;
+ return 0;
+}
+
+/**
+ * wdtpci_get_status:
+ * @status: the new status.
+ *
+ * Extract the status information from a WDT watchdog device. There are
+ * several board variants so we have to know which bits are valid. Some
+ * bits default to one and some to zero in order to be maximally painful.
+ *
+ * we then map the bits onto the status ioctl flags.
+ */
+
+static int wdtpci_get_status(int *status)
+{
+ unsigned char new_status=inb_p(WDT_SR);
+
+ *status=0;
+ if (new_status & WDC_SR_ISOI0)
+ *status |= WDIOF_EXTERN1;
+ if (new_status & WDC_SR_ISII1)
+ *status |= WDIOF_EXTERN2;
+#ifdef CONFIG_WDT_501_PCI
+ if (!(new_status & WDC_SR_TGOOD))
+ *status |= WDIOF_OVERHEAT;
+ if (!(new_status & WDC_SR_PSUOVER))
+ *status |= WDIOF_POWEROVER;
+ if (!(new_status & WDC_SR_PSUUNDR))
+ *status |= WDIOF_POWERUNDER;
+ if (tachometer) {
+ if (!(new_status & WDC_SR_FANGOOD))
+ *status |= WDIOF_FANFAULT;
+ }
+#endif /* CONFIG_WDT_501_PCI */
+ return 0;
+}
+
+#ifdef CONFIG_WDT_501_PCI
+/**
+ * wdtpci_get_temperature:
+ *
+ * Reports the temperature in degrees Fahrenheit. The API is in
+ * farenheit. It was designed by an imperial measurement luddite.
+ */
+
+static int wdtpci_get_temperature(int *temperature)
+{
+ unsigned short c=inb_p(WDT_RT);
+
+ *temperature = (c * 11 / 15) + 7;
+ return 0;
+}
+#endif /* CONFIG_WDT_501_PCI */
+
+/**
+ * wdtpci_interrupt:
+ * @irq: Interrupt number
+ * @dev_id: Unused as we don't allow multiple devices.
+ *
+ * Handle an interrupt from the board. These are raised when the status
+ * map changes in what the board considers an interesting way. That means
+ * a failure condition occurring.
+ */
+
+static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
+{
+ /*
+ * Read the status register see what is up and
+ * then printk it.
+ */
+ unsigned char status=inb_p(WDT_SR);
+
+ printk(KERN_CRIT PFX "status %d\n", status);
+
+#ifdef CONFIG_WDT_501_PCI
+ if (!(status & WDC_SR_TGOOD))
+ printk(KERN_CRIT PFX "Overheat alarm.(%d)\n",inb_p(WDT_RT));
+ if (!(status & WDC_SR_PSUOVER))
+ printk(KERN_CRIT PFX "PSU over voltage.\n");
+ if (!(status & WDC_SR_PSUUNDR))
+ printk(KERN_CRIT PFX "PSU under voltage.\n");
+ if (tachometer) {
+ if (!(status & WDC_SR_FANGOOD))
+ printk(KERN_CRIT PFX "Possible fan fault.\n");
+ }
+#endif /* CONFIG_WDT_501_PCI */
+ if (!(status&WDC_SR_WCCR))
+#ifdef SOFTWARE_REBOOT
+#ifdef ONLY_TESTING
+ printk(KERN_CRIT PFX "Would Reboot.\n");
+#else
+ printk(KERN_CRIT PFX "Initiating system reboot.\n");
+ emergency_restart(NULL);
+#endif
+#else
+ printk(KERN_CRIT PFX "Reset in 5ms.\n");
+#endif
+ return IRQ_HANDLED;
+}
+
+
+/**
+ * wdtpci_write:
+ * @file: file handle to the watchdog
+ * @buf: buffer to write (unused as data does not matter here
+ * @count: count of bytes
+ * @ppos: pointer to the position to write. No seeks allowed
+ *
+ * A write to a watchdog device is defined as a keepalive signal. Any
+ * write of data will do, as we we don't define content meaning.
+ */
+
+static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+{
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if(get_user(c, buf+i))
+ return -EFAULT;
+ if (c == 'V')
+ expect_close = 42;
+ }
+ }
+ wdtpci_ping();
+ }
+
+ return count;
+}
+
+/**
+ * wdtpci_ioctl:
+ * @inode: inode of the device
+ * @file: file handle to the device
+ * @cmd: watchdog command
+ * @arg: argument pointer
+ *
+ * The watchdog API defines a common set of functions for all watchdogs
+ * according to their available features. We only actually usefully support
+ * querying capabilities and current status.
+ */
+
+static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ int new_heartbeat;
+ int status;
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+
+ static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT|
+ WDIOF_MAGICCLOSE|
+ WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = "PCI-WDT500/501",
+ };
+
+ /* Add options according to the card we have */
+ ident.options |= (WDIOF_EXTERN1|WDIOF_EXTERN2);
+#ifdef CONFIG_WDT_501_PCI
+ ident.options |= (WDIOF_OVERHEAT|WDIOF_POWERUNDER|WDIOF_POWEROVER);
+ if (tachometer)
+ ident.options |= WDIOF_FANFAULT;
+#endif /* CONFIG_WDT_501_PCI */
+
+ switch(cmd)
+ {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
+
+ case WDIOC_GETSTATUS:
+ wdtpci_get_status(&status);
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdtpci_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+
+ if (wdtpci_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+
+ wdtpci_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ }
+}
+
+/**
+ * wdtpci_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * The watchdog device has been opened. The watchdog device is single
+ * open and on opening we load the counters. Counter zero is a 100Hz
+ * cascade, into counter 1 which downcounts to reboot. When the counter
+ * triggers counter 2 downcounts the length of the reset pulse which
+ * set set to be as long as possible.
+ */
+
+static int wdtpci_open(struct inode *inode, struct file *file)
+{
+ if (down_trylock(&open_sem))
+ return -EBUSY;
+
+ if (nowayout) {
+ __module_get(THIS_MODULE);
+ }
+ /*
+ * Activate
+ */
+ wdtpci_start();
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdtpci_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The watchdog has a configurable API. There is a religious dispute
+ * between people who want their watchdog to be able to shut down and
+ * those who want to be sure if the watchdog manager dies the machine
+ * reboots. In the former case we disable the counters, in the latter
+ * case you have to open it again very soon.
+ */
+
+static int wdtpci_release(struct inode *inode, struct file *file)
+{
+ if (expect_close == 42) {
+ wdtpci_stop();
+ } else {
+ printk(KERN_CRIT PFX "Unexpected close, not stopping timer!");
+ wdtpci_ping();
+ }
+ expect_close = 0;
+ up(&open_sem);
+ return 0;
+}
+
+#ifdef CONFIG_WDT_501_PCI
+/**
+ * wdtpci_temp_read:
+ * @file: file handle to the watchdog board
+ * @buf: buffer to write 1 byte into
+ * @count: length of buffer
+ * @ptr: offset (no seek allowed)
+ *
+ * Read reports the temperature in degrees Fahrenheit. The API is in
+ * fahrenheit. It was designed by an imperial measurement luddite.
+ */
+
+static ssize_t wdtpci_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
+{
+ int temperature;
+
+ if (wdtpci_get_temperature(&temperature))
+ return -EFAULT;
+
+ if (copy_to_user (buf, &temperature, 1))
+ return -EFAULT;
+
+ return 1;
+}
+
+/**
+ * wdtpci_temp_open:
+ * @inode: inode of device
+ * @file: file handle to device
+ *
+ * The temperature device has been opened.
+ */
+
+static int wdtpci_temp_open(struct inode *inode, struct file *file)
+{
+ return nonseekable_open(inode, file);
+}
+
+/**
+ * wdtpci_temp_release:
+ * @inode: inode to board
+ * @file: file handle to board
+ *
+ * The temperature device has been closed.
+ */
+
+static int wdtpci_temp_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+#endif /* CONFIG_WDT_501_PCI */
+
+/**
+ * notify_sys:
+ * @this: our notifier block
+ * @code: the event being reported
+ * @unused: unused
+ *
+ * Our notifier is called on system shutdowns. We want to turn the card
+ * off at reboot otherwise the machine will reboot again during memory
+ * test or worse yet during the following fsck. This would suck, in fact
+ * trust me - if it happens it does suck.
+ */
+
+static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ if (code==SYS_DOWN || code==SYS_HALT) {
+ /* Turn the card off */
+ wdtpci_stop();
+ }
+ return NOTIFY_DONE;
+}
+
+/*
+ * Kernel Interfaces
+ */
+
+
+static const struct file_operations wdtpci_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = wdtpci_write,
+ .ioctl = wdtpci_ioctl,
+ .open = wdtpci_open,
+ .release = wdtpci_release,
+};
+
+static struct miscdevice wdtpci_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdtpci_fops,
+};
+
+#ifdef CONFIG_WDT_501_PCI
+static const struct file_operations wdtpci_temp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = wdtpci_temp_read,
+ .open = wdtpci_temp_open,
+ .release = wdtpci_temp_release,
+};
+
+static struct miscdevice temp_miscdev = {
+ .minor = TEMP_MINOR,
+ .name = "temperature",
+ .fops = &wdtpci_temp_fops,
+};
+#endif /* CONFIG_WDT_501_PCI */
+
+/*
+ * The WDT card needs to learn about soft shutdowns in order to
+ * turn the timebomb registers off.
+ */
+
+static struct notifier_block wdtpci_notifier = {
+ .notifier_call = wdtpci_notify_sys,
+};
+
+
+static int __devinit wdtpci_init_one (struct pci_dev *dev,
+ const struct pci_device_id *ent)
+{
+ int ret = -EIO;
+
+ dev_count++;
+ if (dev_count > 1) {
+ printk (KERN_ERR PFX "this driver only supports 1 device\n");
+ return -ENODEV;
+ }
+
+ if (pci_enable_device (dev)) {
+ printk (KERN_ERR PFX "Not possible to enable PCI Device\n");
+ return -ENODEV;
+ }
+
+ if (pci_resource_start (dev, 2) == 0x0000) {
+ printk (KERN_ERR PFX "No I/O-Address for card detected\n");
+ ret = -ENODEV;
+ goto out_pci;
+ }
+
+ sema_init(&open_sem, 1);
+ spin_lock_init(&wdtpci_lock);
+
+ irq = dev->irq;
+ io = pci_resource_start (dev, 2);
+
+ if (request_region (io, 16, "wdt_pci") == NULL) {
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", io);
+ goto out_pci;
+ }
+
+ if (request_irq (irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ "wdt_pci", &wdtpci_miscdev)) {
+ printk (KERN_ERR PFX "IRQ %d is not free\n", irq);
+ goto out_reg;
+ }
+
+ printk ("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n",
+ io, irq);
+
+ /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ if (wdtpci_set_heartbeat(heartbeat)) {
+ wdtpci_set_heartbeat(WD_TIMO);
+ printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
+ WD_TIMO);
+ }
+
+ ret = register_reboot_notifier (&wdtpci_notifier);
+ if (ret) {
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
+ goto out_irq;
+ }
+
+#ifdef CONFIG_WDT_501_PCI
+ ret = misc_register (&temp_miscdev);
+ if (ret) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
+ goto out_rbt;
+ }
+#endif /* CONFIG_WDT_501_PCI */
+
+ ret = misc_register (&wdtpci_miscdev);
+ if (ret) {
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto out_misc;
+ }
+
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
+#ifdef CONFIG_WDT_501_PCI
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
+#endif /* CONFIG_WDT_501_PCI */
+
+ ret = 0;
+out:
+ return ret;
+
+out_misc:
+#ifdef CONFIG_WDT_501_PCI
+ misc_deregister(&temp_miscdev);
+out_rbt:
+#endif /* CONFIG_WDT_501_PCI */
+ unregister_reboot_notifier(&wdtpci_notifier);
+out_irq:
+ free_irq(irq, &wdtpci_miscdev);
+out_reg:
+ release_region (io, 16);
+out_pci:
+ pci_disable_device(dev);
+ goto out;
+}
+
+
+static void __devexit wdtpci_remove_one (struct pci_dev *pdev)
+{
+ /* here we assume only one device will ever have
+ * been picked up and registered by probe function */
+ misc_deregister(&wdtpci_miscdev);
+#ifdef CONFIG_WDT_501_PCI
+ misc_deregister(&temp_miscdev);
+#endif /* CONFIG_WDT_501_PCI */
+ unregister_reboot_notifier(&wdtpci_notifier);
+ free_irq(irq, &wdtpci_miscdev);
+ release_region(io, 16);
+ pci_disable_device(pdev);
+ dev_count--;
+}
+
+
+static struct pci_device_id wdtpci_pci_tbl[] = {
+ {
+ .vendor = PCI_VENDOR_ID_ACCESSIO,
+ .device = PCI_DEVICE_ID_WDG_CSM,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ },
+ { 0, }, /* terminate list */
+};
+MODULE_DEVICE_TABLE(pci, wdtpci_pci_tbl);
+
+
+static struct pci_driver wdtpci_driver = {
+ .name = "wdt_pci",
+ .id_table = wdtpci_pci_tbl,
+ .probe = wdtpci_init_one,
+ .remove = __devexit_p(wdtpci_remove_one),
+};
+
+
+/**
+ * wdtpci_cleanup:
+ *
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in xx seconds or reboot.
+ */
+
+static void __exit wdtpci_cleanup(void)
+{
+ pci_unregister_driver (&wdtpci_driver);
+}
+
+
+/**
+ * wdtpci_init:
+ *
+ * Set up the WDT watchdog board. All we have to do is grab the
+ * resources we require and bitch if anyone beat us to them.
+ * The open() function will actually kick the board off.
+ */
+
+static int __init wdtpci_init(void)
+{
+ return pci_register_driver (&wdtpci_driver);
+}
+
+
+module_init(wdtpci_init);
+module_exit(wdtpci_cleanup);
+
+MODULE_AUTHOR("JP Nollmann, Alan Cox");
+MODULE_DESCRIPTION("Driver for the ICS PCI-WDT500/501 watchdog cards");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+MODULE_ALIAS_MISCDEV(TEMP_MINOR);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff