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ARM: debug-ll: rework footbridge handling
authorArnd Bergmann <arnd@arndb.de>
Thu, 3 Dec 2015 17:27:53 +0000 (18:27 +0100)
committerArnd Bergmann <arnd@arndb.de>
Tue, 15 Dec 2015 22:43:29 +0000 (23:43 +0100)
Footbridge has two debug ports that are handled a bit differently:

The 8250 port uses the normal debug/8250.S implementation that is shared
with a lot of other platforms, but it relies on the DEBUG_UART_8250
option to be turned on automatically instead of being selected by
DEBUG_FOOTBRIDGE_COM1 as we do for most other platforms. I'm changing
this to use a 'select' and change the dependency to the debug symbol
rather than the platform symbol for consistency.

The DC21285 UART has a separate top-level option, and relies on
the traditional include/mach/debug-macro.S method. With the s3c64xx
multiplatform series queued up for 4.5, it is now the last one that does
this, so by moving this file to include/debug/dc21285.S, we can get
all platforms to do things the same way.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
arch/arm/Kconfig.debug patch | blob | blame | history
arch/arm/include/debug/dc21285.S [new file with mode: 0644] patch | blob
arch/arm/mach-footbridge/include/mach/debug-macro.S [deleted file] patch | blob | blame | history

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index cff7a32a955ed953b363cb786e3d47c45d6fac43..fea1e685fb5a4a4576b9ee9864ed28bf33cd45f6 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -274,6 +274,7 @@ choice
        config DEBUG_FOOTBRIDGE_COM1
                bool "Kernel low-level debugging messages via footbridge 8250 at PCI COM1"
                depends on FOOTBRIDGE
+               select DEBUG_UART_8250
                help
                  Say Y here if you want the debug print routines to direct
                  their output to the 8250 at PCI COM1.
@@ -1374,6 +1375,7 @@ config DEBUG_LL_INCLUDE
        default "debug/at91.S" if DEBUG_AT91_UART
        default "debug/asm9260.S" if DEBUG_ASM9260_UART
        default "debug/clps711x.S" if DEBUG_CLPS711X_UART1 || DEBUG_CLPS711X_UART2
+       default "debug/dc21285.S" if DEBUG_DC21285_PORT
        default "debug/meson.S" if DEBUG_MESON_UARTAO
        default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X
        default "debug/exynos.S" if DEBUG_EXYNOS_UART
@@ -1424,7 +1426,7 @@ config DEBUG_UART_PL01X
 
 # Compatibility options for 8250
 config DEBUG_UART_8250
-       def_bool ARCH_EBSA110 || (FOOTBRIDGE && !DEBUG_DC21285_PORT) || \
+       def_bool ARCH_EBSA110 || \
                ARCH_IOP13XX || ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX || \
                ARCH_RPC
 
@@ -1479,7 +1481,7 @@ config DEBUG_UART_PHYS
        default 0x50008000 if DEBUG_S3C24XX_UART && (DEBUG_S3C_UART2 || \
                                DEBUG_S3C2410_UART2)
        default 0x78000000 if DEBUG_CNS3XXX
-       default 0x7c0003f8 if FOOTBRIDGE
+       default 0x7c0003f8 if DEBUG_FOOTBRIDGE_COM1
        default 0x80010000 if DEBUG_ASM9260_UART
        default 0x80070000 if DEBUG_IMX23_UART
        default 0x80074000 if DEBUG_IMX28_UART
@@ -1610,7 +1612,7 @@ config DEBUG_UART_VIRT
        default 0xfed64000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
        default 0xfed68000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
        default 0xfedc0000 if DEBUG_EP93XX
-       default 0xfee003f8 if FOOTBRIDGE
+       default 0xfee003f8 if DEBUG_FOOTBRIDGE_COM1
        default 0xfee20000 if DEBUG_NSPIRE_CLASSIC_UART || DEBUG_NSPIRE_CX_UART
        default 0xfee82340 if ARCH_IOP13XX
        default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN
@@ -1633,7 +1635,7 @@ config DEBUG_UART_VIRT
 config DEBUG_UART_8250_SHIFT
        int "Register offset shift for the 8250 debug UART"
        depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
-       default 0 if FOOTBRIDGE || ARCH_IOP32X || DEBUG_BCM_5301X || \
+       default 0 if DEBUG_FOOTBRIDGE_COM1 || ARCH_IOP32X || DEBUG_BCM_5301X || \
                DEBUG_OMAP7XXUART1 || DEBUG_OMAP7XXUART2 || DEBUG_OMAP7XXUART3
        default 2
 
@@ -1653,7 +1655,7 @@ config DEBUG_UART_8250_WORD
 config DEBUG_UART_8250_FLOW_CONTROL
        bool "Enable flow control for 8250 UART"
        depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
-       default y if ARCH_EBSA110 || FOOTBRIDGE || DEBUG_GEMINI || ARCH_RPC
+       default y if ARCH_EBSA110 || DEBUG_FOOTBRIDGE_COM1 || DEBUG_GEMINI || ARCH_RPC
 
 config DEBUG_UNCOMPRESS
        bool
diff --git a/arch/arm/include/debug/dc21285.S b/arch/arm/include/debug/dc21285.S
new file mode 100644 (file)
index 0000000..02247f3
--- /dev/null
+++ b/arch/arm/include/debug/dc21285.S
@@ -0,0 +1,42 @@
+/* arch/arm/mach-footbridge/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * 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 <asm/hardware/dec21285.h>
+
+#include <mach/hardware.h>
+       /* For EBSA285 debugging */
+               .equ    dc21285_high, ARMCSR_BASE & 0xff000000
+               .equ    dc21285_low,  ARMCSR_BASE & 0x00ffffff
+
+               .macro  addruart, rp, rv, tmp
+               .if     dc21285_low
+               mov     \rp, #dc21285_low
+               .else
+               mov     \rp, #0
+               .endif
+               orr     \rv, \rp, #dc21285_high
+               orr     \rp, \rp, #0x42000000
+               .endm
+
+               .macro  senduart,rd,rx
+               str     \rd, [\rx, #0x160]      @ UARTDR
+               .endm
+
+               .macro  busyuart,rd,rx
+1001:          ldr     \rd, [\rx, #0x178]      @ UARTFLG
+               tst     \rd, #1 << 3
+               bne     1001b
+               .endm
+
+               .macro  waituart,rd,rx
+               .endm
diff --git a/arch/arm/mach-footbridge/include/mach/debug-macro.S b/arch/arm/mach-footbridge/include/mach/debug-macro.S
deleted file mode 100644 (file)
index 02247f3..0000000
--- a/arch/arm/mach-footbridge/include/mach/debug-macro.S
+++ /dev/null
@@ -1,42 +0,0 @@
-/* arch/arm/mach-footbridge/include/mach/debug-macro.S
- *
- * Debugging macro include header
- *
- *  Copyright (C) 1994-1999 Russell King
- *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
- *
- * 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 <asm/hardware/dec21285.h>
-
-#include <mach/hardware.h>
-       /* For EBSA285 debugging */
-               .equ    dc21285_high, ARMCSR_BASE & 0xff000000
-               .equ    dc21285_low,  ARMCSR_BASE & 0x00ffffff
-
-               .macro  addruart, rp, rv, tmp
-               .if     dc21285_low
-               mov     \rp, #dc21285_low
-               .else
-               mov     \rp, #0
-               .endif
-               orr     \rv, \rp, #dc21285_high
-               orr     \rp, \rp, #0x42000000
-               .endm
-
-               .macro  senduart,rd,rx
-               str     \rd, [\rx, #0x160]      @ UARTDR
-               .endm
-
-               .macro  busyuart,rd,rx
-1001:          ldr     \rd, [\rx, #0x178]      @ UARTFLG
-               tst     \rd, #1 << 3
-               bne     1001b
-               .endm
-
-               .macro  waituart,rd,rx
-               .endm