GitHub/moto-9609/android_kernel_motorola_exynos9610.git
9 years agousb: dwc2: add shutdown callback to platform variant
Heiko Stübner [Fri, 18 Dec 2015 18:30:59 +0000 (19:30 +0100)]
usb: dwc2: add shutdown callback to platform variant

In specific conditions (involving usb hubs) dwc2 devices can create a
lot of interrupts, even to the point of overwhelming devices running
at low frequencies. Some devices need to do special clock handling
at shutdown-time which may bring the system clock below the threshold
of being able to handle the dwc2 interrupts. Disabling dwc2-irqs
in a shutdown callbacks prevents reboots/poweroffs from getting stuck
in such cases.

The hsotg struct already contains an unused irq element, so we can
just use it to store the irq number for the shutdown callback.

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Heiko Stuebner <heiko.stuebner@collabora.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: bcm63xx_udc: use list_for_each_entry_safe
Geliang Tang [Fri, 18 Dec 2015 16:34:34 +0000 (00:34 +0800)]
usb: gadget: bcm63xx_udc: use list_for_each_entry_safe

Use list_for_each_entry_safe() instead of list_for_each_safe() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: musb: core: call init and shutdown for the usb phy
Uwe Kleine-König [Fri, 18 Dec 2015 11:02:04 +0000 (12:02 +0100)]
usb: musb: core: call init and shutdown for the usb phy

The phy's init routine must be called before it can be used. Do so in
musb_init_controller and the matching shutdown in musb_remove.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: forbid queuing request to a disabled ep
Du, Changbin [Fri, 18 Dec 2015 07:36:40 +0000 (15:36 +0800)]
usb: gadget: forbid queuing request to a disabled ep

Queue a request to disabled ep  doesn't make sense, and induce caller
make mistakes.

Here is a example for the android mtp gadget function driver. A mem
corruption can happen on below senario.
1) On disconnect, mtp driver disable its EPs,
2) During send_file_work and receive_file_work, mtp queues a request
   to ep. (The mtp driver need improve its synchronization logic!)
3) mtp_function_unbind is invoked and all mtp requests are freed.
4) when udc process the request queued on step 2, will cause kernel
   NULL pointer dereference exception.

Signed-off-by: Du, Changbin <changbin.du@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: gadget: Repair DSTS register decoding
Marek Vasut [Fri, 18 Dec 2015 02:26:17 +0000 (03:26 +0100)]
usb: dwc2: gadget: Repair DSTS register decoding

The "enumspd" field is located in register DSTS[2:1], but the code
which checks the bitfield does not shift the value accordingly. This
in turn causes incorrect detection of gadget link partner speed in
dwc2_hsotg_irq_enumdone() .

Shift the value accordingly to fix the problem with speed detection.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: gadget: Remove call to dwc2_hsotg_init()
John Youn [Thu, 17 Dec 2015 19:18:41 +0000 (11:18 -0800)]
usb: dwc2: gadget: Remove call to dwc2_hsotg_init()

Remove call to dwc2_hsotg_init() from dwc2_gadget_init(). The
gadget_init function should not access any device registers because the
mode isn't guaranteed here.

Also, this is already called elsewhere before anything starts on the
gadget so it is not necessary here.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Remove redundant reset in probe
John Youn [Thu, 17 Dec 2015 19:18:27 +0000 (11:18 -0800)]
usb: dwc2: Remove redundant reset in probe

Reset already happens before this so just force the dr_mode.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Reduce delay when forcing mode in reset
John Youn [Thu, 17 Dec 2015 19:18:13 +0000 (11:18 -0800)]
usb: dwc2: Reduce delay when forcing mode in reset

The delay for force mode is only 25ms according to the databook.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: gadget: Replace dwc2_hsotg_corereset()
John Youn [Thu, 17 Dec 2015 19:17:59 +0000 (11:17 -0800)]
usb: dwc2: gadget: Replace dwc2_hsotg_corereset()

The dwc2_core_reset() function exists in the core so use that one
instead.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: gadget: Use hw params from core
John Youn [Thu, 17 Dec 2015 19:17:45 +0000 (11:17 -0800)]
usb: dwc2: gadget: Use hw params from core

Use the previously cached hw params in the gadget. This saves a reset
and force mode in the gadget initialization during probe and makes
getting the hardware parameters consistent between gadget and host.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Improve handling of host and device hwparams
John Youn [Thu, 17 Dec 2015 19:17:31 +0000 (11:17 -0800)]
usb: dwc2: Improve handling of host and device hwparams

Adds separate functions to get the host and device specific hardware
parameters. The functions check whether the parameters need to be read
at all, depending on dr_mode, and forces the mode only if necessary.
This saves some delays during probe. This also adds two device mode
parameters that will be used by the gadget.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Add functions to set and clear force mode
John Youn [Thu, 17 Dec 2015 19:17:12 +0000 (11:17 -0800)]
usb: dwc2: Add functions to set and clear force mode

Added functions to set force mode for host and device. These functions
will check the current mode and only force if needed thus avoiding
unnecessary force mode delays. However clearing the mode is currently
done unconditionally and with the delay in place. This is needed during
the connector ID status change interrupt in order to ensure that the
mode has changed properly. This preserves the old behavior only for this
case. The warning comment about this is moved into the clear mode
condition.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Move reset into dwc2_get_hwparams()
John Youn [Thu, 17 Dec 2015 19:16:58 +0000 (11:16 -0800)]
usb: dwc2: Move reset into dwc2_get_hwparams()

The reset is required to get reset values of the hardware parameters but
the force mode is not. Move the base reset into dwc2_get_hwparams() and
do the reset and force mode afterwards.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Move mode querying functions into core.h
John Youn [Thu, 17 Dec 2015 19:16:45 +0000 (11:16 -0800)]
usb: dwc2: Move mode querying functions into core.h

These functions should go in core.h where they can be called from core,
device, or host.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Fix dr_mode validation
John Youn [Thu, 17 Dec 2015 19:16:31 +0000 (11:16 -0800)]
usb: dwc2: Fix dr_mode validation

The dr_mode parameter was being checked against how the dwc2 module
was being configured at compile time. But it wasn't checked against
the hardware capabilities, nor were the hardware capabilities checked
against the compilation parameters.

This commit adds those checks and adjusts dr_mode to an appropriate
value, if needed. If the hardware capabilities and module compilation
do not match then we fail as it wouldn't be possible to run properly.

The hardware, module, and dr_mode, can each be set to host, device,
or otg. Check that all these values are compatible and adjust the
value of dr_mode if possible.

The following table summarizes the behavior:

                     actual
   HW  MOD dr_mode   dr_mode
 ------------------------------
  HST  HST  any    :  HST
  HST  DEV  any    :  ---
  HST  OTG  any    :  HST

  DEV  HST  any    :  ---
  DEV  DEV  any    :  DEV
  DEV  OTG  any    :  DEV

  OTG  HST  any    :  HST
  OTG  DEV  any    :  DEV
  OTG  OTG  any    :  dr_mode

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Add functions to check the HW OTG config
John Youn [Thu, 17 Dec 2015 19:16:17 +0000 (11:16 -0800)]
usb: dwc2: Add functions to check the HW OTG config

Added functions to query the GHWCFG2.OTG_MODE. This tells us whether the
controller hardware is configured for OTG, device-only, or host-only.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Add dwc2_core_reset()
John Youn [Thu, 17 Dec 2015 19:16:03 +0000 (11:16 -0800)]
usb: dwc2: Add dwc2_core_reset()

dwc2_core_reset() was previously renamed to
dwc2_core_reset_and_dr_force_mode(). Now add back dwc2_core_reset() which
performs only a basic core reset without forcing the mode.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Rename dwc2_core_reset()
John Youn [Thu, 17 Dec 2015 19:15:49 +0000 (11:15 -0800)]
usb: dwc2: Rename dwc2_core_reset()

Renamed dwc2_core_reset() to dwc2_core_reset_and_force_dr_mode(). This
describes what it is doing more accurately. This is in preparation of
introducing a plain dwc2_core_reset() function that only performs the
reset and doesn't force the mode.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Reorder AHBIDLE and CSFTRST in dwc2_core_reset()
John Youn [Thu, 17 Dec 2015 19:15:35 +0000 (11:15 -0800)]
usb: dwc2: Reorder AHBIDLE and CSFTRST in dwc2_core_reset()

According to the databook, the core soft reset should be done before
checking for AHBIDLE. The gadget version of core reset had it correct
but the hcd version did not. This fixes the hcd version.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Avoid more calls to dwc2_core_reset()
Douglas Anderson [Thu, 17 Dec 2015 19:15:21 +0000 (11:15 -0800)]
usb: dwc2: Avoid more calls to dwc2_core_reset()

Calls to dwc2_core_reset() are currently very slow, taking at least
150ms (possibly more).  It behooves us to take as many of these calls
out as possible.

It turns out that the calls in dwc2_fs_phy_init() and dwc2_hs_phy_init()
should (as documented in the code) only be needed if we need to do a PHY
SELECT.  That means that if we see that we can avoid the PHY SELECT then
we can avoid the reset.

This patch appears to successfully bypass two resets (one per USB
device) on rk3288-based ARM Chromebooks.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: reduce dwc2 driver probe time
Yunzhi Li [Thu, 17 Dec 2015 19:15:08 +0000 (11:15 -0800)]
usb: dwc2: reduce dwc2 driver probe time

I found that the probe function of dwc2 driver takes much time
when kernel boot up. There are many long delays in the probe
function these take almost 1 second.

This patch trying to reduce unnecessary delay time.

In dwc2_core_reset() I see it use two at least 20ms delays to
wait AHB idle and core soft reset, but dwc2 data book said that
dwc2 core soft reset and AHB idle just need a few clocks (I think
it refers to AHB clock, and AHB clock run at 150MHz in my RK3288
board), so 20ms is too long, delay 1us for wait AHB idle and soft
reset is enough.

And in dwc2_get_hwparams() it takes 150ms to wait ForceHostMode
and ForceDeviceMode valid but in data book it said software must
wait at least 25ms before the change to take effect, so I reduce
this time to 25ms~50ms. By the way, is there any state bit show
that the force mode take effect ? Could we poll curmod bit for
figuring out if the change take effect ?

It seems that usleep_range() at boot time will pick the longest
value in the range. In dwc2_core_reset() there is a very long
delay takes 200ms, and this function run twice when probe, could
any one tell me is this delay time resonable ?

I have tried this patch in my RK3288-evb board. It works well.

Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Speed dwc2_get_hwparams() on some host-only ports
Douglas Anderson [Thu, 17 Dec 2015 19:14:54 +0000 (11:14 -0800)]
usb: dwc2: Speed dwc2_get_hwparams() on some host-only ports

On some host-only DWC2 ports (like the one in rk3288) when we set
GUSBCFG_FORCEHOSTMODE in GUSBCFG and then read back, we don't see the
bit set.  Presumably that's because the port is always forced to HOST
mode so there's no reason to implement these status bits.

Since we know dwc2_core_reset() is always called before
dwc2_get_hwparams() and we know dwc2_core_reset() should have set
GUSBCFG_FORCEHOSTMODE whenever hsotg->dr_mode == USB_DR_MODE_HOST, we
can just check hsotg->dr_mode to decide that we can skip the delays in
dwc2_get_hwparams().

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Avoid double-reset at boot time
Douglas Anderson [Thu, 17 Dec 2015 19:14:40 +0000 (11:14 -0800)]
usb: dwc2: Avoid double-reset at boot time

In (usb: dwc2: reset dwc2 core before dwc2_get_hwparams()) we added an
extra reset to the probe path for the dwc2 USB controllers.  This
allowed proper detection of parameters even if the firmware had already
used the USB part.

Unfortunately, this extra reset is quite slow and is affecting boot
speed.  We can avoid the double-reset by skipping the extra reset that
would happen just after the one we added.  Logic that explains why this
is safe:

* As of the CL mentioned above, we now always call dwc2_core_reset() in
  dwc2_driver_probe() before dwc2_hcd_init().

* The only caller of dwc2_hcd_init() is dwc2_driver_probe(), so we're
  guaranteed that dwc2_core_reset() was called before dwc2_hdc_init().

* dwc2_hdc_init() is the only caller that passes an irq other than -1 to
  dwc2_core_init().  Thus if dwc2_core_init() is called with an irq
  other than -1 we're guaranteed that dwc2_core_reset was called before
  dwc2_core_init().

...this allows us to remove the dwc2_core_reset() in dwc2_core_init() if
irq is not < 0.

Note that since "irq" wasn't used in the function dwc2_core_init()
anyway and since select_phy was always set at exactly the same times we
could avoid the reset, we remove "irq" and rename "select_phy" to
"initial_setup" and adjust the callers accordingly.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: reset dwc2 core before dwc2_get_hwparams()
Yunzhi Li [Thu, 17 Dec 2015 19:14:26 +0000 (11:14 -0800)]
usb: dwc2: reset dwc2 core before dwc2_get_hwparams()

We initiate dwc2 usb controller in BIOS, dwc2_core_reset() should
be called before dwc2_get_hwparams() to reset core registers to
default value. Without this the FIFO setting might be incorrect
because calculating FIFO size need power-on value of
GRXFSIZ/GNPTXFSIZ/HPTXFSIZ registers.

This patch could avoid warnning massage like in rk3288 platform:
[    2.074764] dwc2 ff580000.usb: 256 invalid for
host_perio_tx_fifo_size. Check HW configuration.

Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: Restore GUSBCFG in dwc2_get_hwparams()
Douglas Anderson [Thu, 17 Dec 2015 19:14:12 +0000 (11:14 -0800)]
usb: dwc2: Restore GUSBCFG in dwc2_get_hwparams()

Previously dwc2_get_hwparams() was changing GUSBCFG and not putting it
back the way it was (specifically it set and cleared FORCEHOSTMODE).
Since we want to move dwc2_core_reset() _before_ dwc2_get_hwparams() we
should make sure dwc2_get_hwparams() isn't messing with things in a
permanent way.

Since we're now looking at GUSBCFG, it's obvious that we shouldn't need
all the extra delays if FORCEHOSTMODE was already set.  This will avoid
some delays for any ports that have forced host mode.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: gadget: don't overwrite DCTL register on NAKEFF interrupts
Gregory Herrero [Mon, 7 Dec 2015 11:07:31 +0000 (12:07 +0100)]
usb: dwc2: gadget: don't overwrite DCTL register on NAKEFF interrupts

When receiving GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF interrupt,
DCTL will be overwritten with DCTL_CGOUTNAK or DCTL_CGNPINNAK values.
Instead of overwriting it, write only needed bits.

It could cause an issue if GINTSTS_GINNAKEFF or GINTSTS_GOUTNAKEFF
interrupt is received after dwc2 disabled pullup by writing
DCTL_SFTDISCON bit.
Pullup will then be re-enabled whereas it should not.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: fix transfer stop programming for out endpoint
Du, Changbin [Fri, 4 Dec 2015 07:38:23 +0000 (15:38 +0800)]
usb: dwc2: fix transfer stop programming for out endpoint

To stop an out endpoint, software should set sets the Global OUT NAK,
but not the Global Non-periodic IN NAK. This driver bug leads the out-ep
failed be in disabled state with below error.

dwc2_hsotg_ep_stop_xfr: timeout DOEPCTL.EPDisable

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Du, Changbin <changbin.du@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: Add the console support for usb-to-serial port
Baolin Wang [Sat, 21 Nov 2015 07:44:53 +0000 (15:44 +0800)]
usb: gadget: Add the console support for usb-to-serial port

It dose not work when we want to use the usb-to-serial port based
on one usb gadget as a console. Thus this patch adds the console
initialization to support this request.

To avoid the re-entrance when transferring data with usb endpoint,
it introduces a kthread to do the IO transmission.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: of: fix build breakage on !OF
Felipe Balbi [Thu, 17 Dec 2015 15:55:41 +0000 (09:55 -0600)]
usb: of: fix build breakage on !OF

If OF is disabled, we will try to define a stub for
of_usb_get_dr_mode_by_phy(), however that missed a
static inline annotation which made us redefine the
stub over and over again. Fix that.

Fixes: 98bfb3946695 ("usb: of: add an api to get
dr_mode by the phy node")
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: inode.c: fix unbalanced spin_lock in ep0_write
David Eccher [Fri, 11 Dec 2015 21:13:55 +0000 (22:13 +0100)]
usb: gadget: inode.c: fix unbalanced spin_lock in ep0_write

Fix bad unlock balance: ep0_write enter with the locks locked from
inode.c:1769, hence it must exit with spinlock held to avoid double
unlock in dev_config.

Signed-off-by: David Eccher <d.eccher@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: renesas_usbhs: add device tree support for r8a779[23]
Simon Horman [Wed, 16 Dec 2015 04:51:52 +0000 (13:51 +0900)]
usb: renesas_usbhs: add device tree support for r8a779[23]

Simply document new compatibility string.
As a previous patch adds a generic R-Car Gen2 compatibility string
there appears to be no need for a driver updates.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: renesas_usbhs: add fallback compatibility strings
Simon Horman [Wed, 16 Dec 2015 04:51:51 +0000 (13:51 +0900)]
usb: renesas_usbhs: add fallback compatibility strings

Add fallback compatibility strings for R-Car Gen2 and Gen3.
This is in keeping with the fallback scheme being adopted wherever
appropriate for drivers for Renesas SoCs.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: renesas_usbhs: add SoC names to compatibility string documentation
Simon Horman [Wed, 16 Dec 2015 04:51:50 +0000 (13:51 +0900)]
usb: renesas_usbhs: add SoC names to compatibility string documentation

This extends the documentation of compatibility strings a little to
include the SoC names.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: ether: Allow changing the MTU
Mike Looijmans [Mon, 30 Nov 2015 11:18:23 +0000 (12:18 +0100)]
usb: gadget: ether: Allow changing the MTU

The gadget ethernet driver supports changing the MTU, but only allows this
when the USB cable is removed. The comment indicates that this is because
the "peer won't know". Even if the network link is still down and only the
USB link is established, the driver won't allow the change.

Other network interfaces allow changing the MTU any time, and don't force
the link to be disabled. This makes perfect sense, because in order to be
able to negotiate the MTU, the link needs to be up.

Remove the restriction so that it is now actually possible to change the
MTU (e.g. using "ifconfig usb0 mtu 15000") without having to manually pull
the plug or change the driver's default setting.

This is especially important after commit bba787a860fa
("usb: gadget: ether: Allow jumbo frames")

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agoDocumentation: usb: update usb-tools repository address
Robert Baldyga [Fri, 11 Dec 2015 11:24:40 +0000 (12:24 +0100)]
Documentation: usb: update usb-tools repository address

It seems that gitorious repository is no longer accessible, so we
replace it with address to active repository.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_midi: pre-allocate IN requests
Felipe F. Tonello [Tue, 1 Dec 2015 18:31:02 +0000 (18:31 +0000)]
usb: gadget: f_midi: pre-allocate IN requests

This patch introduces pre-allocation of IN endpoint USB requests. This
improves on latency (requires no usb request allocation on transmit) and avoid
several potential probles on allocating too many usb requests (which involves
DMA pool allocation problems).

This implementation also handles better multiple MIDI Gadget ports, always
processing the last processed MIDI substream if the last USB request wasn't
enought to handle the whole stream.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_midi: fail if set_alt fails to allocate requests
Felipe F. Tonello [Tue, 1 Dec 2015 18:31:01 +0000 (18:31 +0000)]
usb: gadget: f_midi: fail if set_alt fails to allocate requests

This ensures that the midi function will only work if the proper number of
IN and OUT requrests are allocated. Otherwise the function will work with less
requests then what the user wants.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_midi: set altsettings only for MIDIStreaming interface
Felipe F. Tonello [Tue, 1 Dec 2015 18:31:00 +0000 (18:31 +0000)]
usb: gadget: f_midi: set altsettings only for MIDIStreaming interface

This avoids duplication of USB requests for OUT endpoint and
re-enabling endpoints.

Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: musb: Fix unbalanced pm_runtime_enable
Tony Lindgren [Tue, 1 Dec 2015 05:37:13 +0000 (21:37 -0800)]
usb: musb: Fix unbalanced pm_runtime_enable

When reloading omap2430 kernel module we get a warning about
unbalanced pm_runtime_enable. Let's fix this. Note that we
need to do this after the child musb-core platform_device is
removed because of pm_runtime_irq_safe being set at the child.

Cc: Bin Liu <b-liu@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: NeilBrown <neil@brown.name>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: musb: core: Fix handling of the phy notifications
Tony Lindgren [Tue, 1 Dec 2015 05:37:12 +0000 (21:37 -0800)]
usb: musb: core: Fix handling of the phy notifications

We currently can't unload omap2430 MUSB platform glue driver module and
this cause issues for fixing the MUSB code further. The reason we can't
remove omap2430 is because it uses the PHY functions and also exports the
omap_musb_mailbox function that some PHY drivers are using.

Let's fix the issue by exporting a more generic musb_mailbox function
from the MUSB core and allow platform glue layers to register phy_callback
function as needed.

And now we can now also get rid of the include/linux/musb-omap.h.

Cc: Bin Liu <b-liu@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: NeilBrown <neil@brown.name>
Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: musb: gadget: remove redundant condition
Geyslan G. Bem [Thu, 10 Dec 2015 20:50:12 +0000 (17:50 -0300)]
usb: musb: gadget: remove redundant condition

This patch removes redundant condition.

 (!A || (A && B)) is the same as (!A || B).

Fixes indentation too.

Tested by: compilation only
Caught by: cppcheck

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: s3c-hsudc: remove redundant condition
Geyslan G. Bem [Thu, 10 Dec 2015 20:50:10 +0000 (17:50 -0300)]
usb: gadget: s3c-hsudc: remove redundant condition

This patch removes redundant condition.

 (!A || (A && B)) is the same as (!A || B).

Tested by compilation only.
Caught by cppcheck.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: gadget: pass a condition to dev_WARN_ONCE()
Felipe Balbi [Thu, 10 Dec 2015 19:08:20 +0000 (13:08 -0600)]
usb: dwc3: gadget: pass a condition to dev_WARN_ONCE()

instead of using:

if (condition) {
dev_WARN_ONCE(dev, true, "foo");
return -EINVAL;
}

let's use:

if (dev_WARN_ONCE(dev, condition, "foo"))
return -EINVAL;

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: udc-core: independent registration of gadgets and gadget drivers
Ruslan Bilovol [Mon, 23 Nov 2015 08:56:38 +0000 (09:56 +0100)]
usb: gadget: udc-core: independent registration of gadgets and gadget drivers

Change behavior during registration of gadgets and
gadget drivers in udc-core. Instead of previous
approach when for successful probe of usb gadget driver
at least one usb gadget should be already registered
use another one where gadget drivers and gadgets
can be registered in udc-core independently.

Independent registration of gadgets and gadget drivers
is useful for built-in into kernel gadget and gadget
driver case - because it's possible that gadget is
really probed only on late_init stage (due to deferred
probe) whereas gadget driver's probe is silently failed
on module_init stage due to no any UDC added.

Also it is useful for modules case - now there is no
difference what module to insert first: gadget module
or gadget driver one.

Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
[simplified code as requested by Alan Stern and Felipe Balbi,
 fixed checkpatch issues]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: udc-core: remove unused usb_udc_attach_driver()
Ruslan Bilovol [Mon, 23 Nov 2015 08:56:37 +0000 (09:56 +0100)]
usb: gadget: udc-core: remove unused usb_udc_attach_driver()

Now when last user of usb_udc_attach_driver() is switched
to passing UDC name via usb_gadget_driver struct, it's safe
to remove this function

Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: configfs: pass UDC name via usb_gadget_driver struct
Ruslan Bilovol [Mon, 23 Nov 2015 08:56:36 +0000 (09:56 +0100)]
usb: gadget: configfs: pass UDC name via usb_gadget_driver struct

Now when udc-core supports binding to specific UDC by passing
its name via 'udc_name' member of usb_gadget_driver struct,
switch to this generic approach.

Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
[rebased and fixed checkpatch issues]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: bind UDC by name passed via usb_gadget_driver structure
Ruslan Bilovol [Mon, 23 Nov 2015 08:56:35 +0000 (09:56 +0100)]
usb: gadget: bind UDC by name passed via usb_gadget_driver structure

Introduce new 'udc_name' member to usb_gadget_driver structure.
The 'udc_name' is a name of UDC that usb_gadget_driver should
be bound to. If udc_name is NULL, it will be bound to any
available UDC.

Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: phy: phy-am335x: bypass first VBUS sensing for host-only mode
Bin Liu [Tue, 8 Dec 2015 16:31:50 +0000 (10:31 -0600)]
usb: phy: phy-am335x: bypass first VBUS sensing for host-only mode

To prevent VBUS contention, the am335x MUSB phy senses VBUS first before
transitioning to host mode. However, for host-only mode, VBUS could be
directly tied to 5V power rail which could prevent MUSB transitions to
host mode.

This change receives dr_mode of the controller then bypass the first
VBUS sensing for host-only mode, so that MUSB can work in host mode
event if VBUS is tied to 5V.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: phy: correct the am335x phy header filename
Bin Liu [Fri, 20 Nov 2015 22:13:07 +0000 (16:13 -0600)]
usb: phy: correct the am335x phy header filename

The filename of am35x-phy-control.h is confusing. The header is used
by the am335x phy driver, but the filename refers to am35x. Even worse
there is indeed another device called am35x but it does not use this
header at all.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: phy: Remove unused Renesas R-Car (Gen1) USB PHY driver
Geert Uytterhoeven [Fri, 4 Dec 2015 16:04:25 +0000 (17:04 +0100)]
usb: phy: Remove unused Renesas R-Car (Gen1) USB PHY driver

As of commit 3d7608e4c169af03 ("ARM: shmobile: bockw: remove legacy
board file and config"), the Renesas R-Car (Gen1) USB PHY driver is no
longer used.
In theory it could still be used on R-Car Gen1 SoCs, but that would
require adding DT support to the driver. Instead, a new driver using the
generic PHY framework should be written, as was done for R-Car Gen2.

Remove the driver for good.

Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: lpc32xxx_udc: clean up and sort include directives out
Vladimir Zapolskiy [Tue, 8 Dec 2015 00:31:13 +0000 (02:31 +0200)]
usb: gadget: lpc32xxx_udc: clean up and sort include directives out

Remove mach/irq.h from the list of included headers, there is no
compilation dependency on this include file, and the change is needed
to prevent a compilation failure, when mach/irq.h is removed.

Additionally remove other unneeded includes and sort out their order.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: trace: show request flags
Felipe Balbi [Thu, 3 Dec 2015 21:27:32 +0000 (15:27 -0600)]
usb: dwc3: trace: show request flags

struct usb_request have 3 flags which might be
important to know about during debug. This patch
shows each of the 3 flags as a single letter:

z -> for zero
s -> short not okay
i -> interrupt

A capital letter means the feature is enabled
while a lower case letter means it is disabled;

Thus 'zsI' indicates that a ZLP is not needed,
that we can accept a short packet and interrupt
for this request should be enabled.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: gadget: handle request->zero
Felipe Balbi [Wed, 2 Dec 2015 16:06:45 +0000 (10:06 -0600)]
usb: dwc3: gadget: handle request->zero

So far, dwc3 has always missed request->zero
handling for every endpoint. Let's implement
that so we can handle cases where transfer must
be finished with a ZLP.

Note that dwc3 is a little special. Even though
we're dealing with a ZLP, we still need a buffer
of wMaxPacketSize bytes; to hide that detail from
every gadget driver, we have a preallocated buffer
of 1024 bytes (biggest bulk size) to use (and
share) among all endpoints.

Reported-by: Ravi B <ravibabu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: musb: convert printk to pr_*
Rasmus Villemoes [Fri, 27 Nov 2015 10:38:21 +0000 (11:38 +0100)]
usb: musb: convert printk to pr_*

This file already uses pr_debug in a few places; this converts the
remaining printks.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: Clear interrupts before handling them
Douglas Anderson [Fri, 20 Nov 2015 17:06:28 +0000 (09:06 -0800)]
usb: dwc2: host: Clear interrupts before handling them

In general it is wise to clear interrupts before processing them.  If
you don't do that, you can get:
 1. Interrupt happens
 2. You look at system state and process interrupt
 3. A new interrupt happens
 4. You clear interrupt without processing it.

This patch was actually a first attempt to fix missing device insertions
as described in (usb: dwc2: host: Fix missing device insertions) and it
did solve some of the signal bouncing problems but not all of
them (which is why I submitted the other patch).  Specifically, this
patch itself would sometimes change:
 1. hardware sees connect
 2. hardware sees disconnect
 3. hardware sees connect
 4. dwc2_port_intr() - clears connect interrupt
 5. dwc2_handle_common_intr() - calls dwc2_hcd_disconnect()

...to:
 1. hardware sees connect
 2. hardware sees disconnect
 3. dwc2_port_intr() - clears connect interrupt
 4. hardware sees connect
 5. dwc2_handle_common_intr() - calls dwc2_hcd_disconnect()

...but with different timing then sometimes we'd still miss cable
insertions.

In any case, though this patch doesn't fix any (known) problems, it
still seems wise as a general policy to clear interrupt before handling
them.

Note that for dwc2_handle_usb_port_intr(), instead of moving the clear
of PRTINT to the beginning of the function we remove it completely.  The
only way to clear PRTINT is to clear the sources that set it in the
first place.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: Add missing spinlock in dwc2_hcd_reset_func()
Douglas Anderson [Fri, 20 Nov 2015 17:06:27 +0000 (09:06 -0800)]
usb: dwc2: host: Add missing spinlock in dwc2_hcd_reset_func()

The dwc2_hcd_reset_func() function is only ever called directly by a
delayed work function.  As such no locks are already held when the
function is called.

Doing a read-modify-write of CPU registers and setting fields in the
main hsotg data structure is a bad idea without locks.  Let's add
locks.

The bug was found by code inspection only.  It turns out that the
dwc2_hcd_reset_func() is only ever called today if the
"host_support_fs_ls_low_power" parameter is enabled and no code in
mainline enables that parameter.  Thus no known issues in mainline are
fixed by this patch, but it's still probably wise to fix the function.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: of: add an api to get dr_mode by the phy node
Bin Liu [Tue, 3 Nov 2015 17:51:15 +0000 (11:51 -0600)]
usb: of: add an api to get dr_mode by the phy node

Some USB phy drivers have different handling for the controller in each
dr_mode. But the phy driver does not have visibility to the dr_mode of
the controller.

This adds an api to return the dr_mode of the controller which
associates the given phy node.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_sourcesink: quit if usb_ep_queue returns error
Peter Chen [Thu, 19 Nov 2015 07:02:19 +0000 (15:02 +0800)]
usb: gadget: f_sourcesink: quit if usb_ep_queue returns error

Since now, we may have more than one request during the test, and
it is better we just quit once the error occurs instead of try
queueing further requests.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Suggested-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: composite: remove redundant bcdUSB setting in legacy
Igor Kotrasinski [Tue, 20 Oct 2015 16:33:13 +0000 (18:33 +0200)]
usb: gadget: composite: remove redundant bcdUSB setting in legacy

Since composite now overwrites bcdUSB for any gadget, remove
setting it in legacy gadgets. All legacy gadgets set 0x0200, the
same as the value additionally set by composite, so there is no
behaviour change.

Signed-off-by: Igor Kotrasinski <i.kotrasinsk@samsung.com>
Rebase onto current balbi/next

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: Support immediate retries for split transactions
Douglas Anderson [Wed, 11 Nov 2015 18:33:52 +0000 (10:33 -0800)]
usb: dwc2: host: Support immediate retries for split transactions

In some cases, like when you've got a "Microsoft Wireless Keyboard 2000"
connected to dwc2 with a hub, expected that we'll get some transfer
errors sometimes.  The controller is expected to try at least 3 times
before giving up.  See figure "Figure A-67. Normal HS CSPLIT 3 Strikes
Smash" in the USB spec.

The dwc2 controller has a way to support this by using the "EC_MC"
field.  The Raspberry Pi driver has logic for setting this right.  See
fiq_fsm_queue_split_transaction() in their "dwc_otg_hcd.c".  Let's use
the same logic.

After making this change, we no longer get dropped characters from the
above mentioned keyboard.  Other devices on the same bus as the keyboard
also behave more properly.

Thanks for Julius Werner for the expert analysis and suggestions.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: Fix missing device insertions
Douglas Anderson [Thu, 19 Nov 2015 21:23:14 +0000 (13:23 -0800)]
usb: dwc2: host: Fix missing device insertions

If you've got your interrupt signals bouncing a bit as you insert your
USB device, you might end up in a state when the device is connected but
the driver doesn't know it.

Specifically, the observed order is:
 1. hardware sees connect
 2. hardware sees disconnect
 3. hardware sees connect
 4. dwc2_port_intr() - clears connect interrupt
 5. dwc2_handle_common_intr() - calls dwc2_hcd_disconnect()

Now you'll be stuck with the cable plugged in and no further interrupts
coming in but the driver will think we're disconnected.

We'll fix this by checking for the missing connect interrupt and
re-connecting after the disconnect is posted.  We don't skip the
disconnect because if there is a transitory disconnect we really want to
de-enumerate and re-enumerate.

Notes:
1. As part of this change we add a "force" parameter to
   dwc2_hcd_disconnect() so that when we're unloading the module we
   avoid the new behavior.  The need for this was pointed out by John
   Youn.
2. The bit of code needed at the end of dwc2_hcd_disconnect() is
   exactly the same bit of code from dwc2_port_intr().  To avoid
   duplication, we refactor that code out into a new function
   dwc2_hcd_connect().

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: John Youn <johnyoun@synopsys.com>
Tested-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: add support of hi6220
Zhangfei Gao [Wed, 18 Nov 2015 07:39:47 +0000 (15:39 +0800)]
usb: dwc2: add support of hi6220

Support hisilicon,hi6220-usb for HiKey board

Acked-by: Rob Herring <robh@kernel.org>
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: use kmem cache to allocate descriptors
Gregory Herrero [Fri, 20 Nov 2015 10:49:31 +0000 (11:49 +0100)]
usb: dwc2: host: use kmem cache to allocate descriptors

Kmem caches help to get correct boundary for descriptor buffers
which need to be 512 bytes aligned for dwc2 controller.
Two kmem caches are needed for generic descriptors and for
hs isochronous descriptors which doesn't have same size.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: fix descriptor list address masking
Mian Yousaf Kaukab [Fri, 20 Nov 2015 10:49:30 +0000 (11:49 +0100)]
usb: dwc2: host: fix descriptor list address masking

Masks for HCDMA.CTD and HCDMA.DMAAddr are incorrect. As we always
start from first descriptor, no need to mask the address anyway.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: avoid usage of dma_alloc_coherent with irqs disabled
Gregory Herrero [Fri, 20 Nov 2015 10:49:29 +0000 (11:49 +0100)]
usb: dwc2: host: avoid usage of dma_alloc_coherent with irqs disabled

Use Streaming DMA mappings to handle cache coherency of frame list and
descriptor list. Cache are always flushed before controller access it
or before cpu access it.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: enable descriptor dma for fs devices
Mian Yousaf Kaukab [Fri, 20 Nov 2015 10:49:28 +0000 (11:49 +0100)]
usb: dwc2: host: enable descriptor dma for fs devices

As descriptor dma mode does not support split transfers, it can't be
enabled for high speed devices. Add a core parameter to enable it for
full speed devices.

Ensure frame list and descriptor list are correctly freed during
disconnect.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: misc: usbtest: Remove timeval usage
Deepa Dinamani [Wed, 4 Nov 2015 23:29:11 +0000 (15:29 -0800)]
usb: misc: usbtest: Remove timeval usage

timeval is deprecated and not y2038 safe.  Its size also changes according
to 32 bit/ 64 bit compilation.  Replace it with 32 and 64 bit versions of
its individual fields, giving two ioctls with different code values.
The two ioctls are necessary to maintain the 32 bit and 64 bit userspace
compatibility with a 64/32 bit kernel.

Change unsigned to __u32 types for a definitive userspace interface.
This is in accordance with the psABI that the unsigned type is always
32 bits.

Also use motonic timer instead of real time to ensure positive delta
values.

Refactor usbtest_ioctl for readability to isolate the handling of the
testing timing measurement.

The official testusb userspace tool can be changed in a separate patch
to reflect the __u32 changes as well. It can use the usbtest_param_32
struct, since 32 bit seconds is long enough for test durations.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: gmidi: Cleanup legacy code
Felipe F. Tonello [Tue, 10 Nov 2015 17:52:07 +0000 (17:52 +0000)]
usb: gadget: gmidi: Cleanup legacy code

Remove unnecessary headers and variables.

Reviewed-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: define free_ep_req as universal function
Felipe F. Tonello [Tue, 10 Nov 2015 17:52:05 +0000 (17:52 +0000)]
usb: gadget: define free_ep_req as universal function

This function is shared between gadget functions, so this avoid unnecessary
duplicated code and potentially avoid memory leaks.

Reviewed-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_midi: remove duplicated code
Felipe F. Tonello [Tue, 10 Nov 2015 17:52:04 +0000 (17:52 +0000)]
usb: gadget: f_midi: remove duplicated code

This code is duplicated from f_midi_start_ep(midi, f, midi->out_ep).

Reviewed-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agoDoc: ABI: configfs-usb-gadget-sourcesink: add two entries for depth of queue
Peter Chen [Fri, 13 Nov 2015 08:00:27 +0000 (16:00 +0800)]
Doc: ABI: configfs-usb-gadget-sourcesink: add two entries for depth of queue

Add both bulk and iso depth of queue entries.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: renesas_usbhs: Modify ep.caps.type_xxx and usb_ep_maxpacket_limit()
Yoshihiro Shimoda [Wed, 18 Nov 2015 05:34:10 +0000 (14:34 +0900)]
usb: renesas_usbhs: Modify ep.caps.type_xxx and usb_ep_maxpacket_limit()

This patch modifies the ep.caps.type_{iso,bulk,int} setting and
the second argument of usb_ep_maxpacket_limit() using
the dparam.pipe_configs.

In the previous code, all the type_{iso,bulk,int} were set to true.
However, to avoid waste time for finding suitable pipe in usb_ep_enable(),
this driver should set correct type.
Also the second argument of usb_ep_maxpacket_limit() was set to 512
even if the pipe is isochronous or interrupt. So, this driver could
not bind a gadget driver like the g_audio driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: renesas_usbhs: Modify pipe configuration
Yoshihiro Shimoda [Wed, 18 Nov 2015 05:34:09 +0000 (14:34 +0900)]
usb: renesas_usbhs: Modify pipe configuration

The current code has info->bufnmb_last to calculate the BUFNMB bits of
PIPEBUF register. However, since the bufnmb_last is initialized in
the usbhs_pipe_init() only, this driver is possible to set unexpected
value to the register if usb_ep_{enable,disable}() are called many times.

So, this patch modifies the pipe configuration via struct
renesas_usbhs_driver_param to simplify the code. Also this patch changes:
 - a double buffer configuration
 - isochronous buffer size from 512 to 1024

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: process all completed urbs
Gregory Herrero [Thu, 5 Nov 2015 08:41:45 +0000 (09:41 +0100)]
usb: dwc2: host: process all completed urbs

Process all completed urbs, if more urbs are complete by the time
driver processes completion interrupt.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: always increment available host channel during release
Gregory Herrero [Thu, 5 Nov 2015 08:41:44 +0000 (09:41 +0100)]
usb: dwc2: host: always increment available host channel during release

When releasing a channel, increment hsotg->available_host_channels even
in case a periodic channel is released.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: program descriptor for next frame
Gregory Herrero [Thu, 5 Nov 2015 08:41:43 +0000 (09:41 +0100)]
usb: dwc2: host: program descriptor for next frame

Isochronous descriptor is currently programmed for the frame
after the last descriptor was programmed.

If the last descriptor frame underrun, then current descriptor must
take this into account and must be programmed on the current frame + 1.
This overrun usually happens when system is loaded and dwc2 can't init
descriptor list in time.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: add function to compare frame index
Gregory Herrero [Thu, 5 Nov 2015 08:41:42 +0000 (09:41 +0100)]
usb: dwc2: host: add function to compare frame index

This function allow comparing frame index used for
descriptor list which has 64 entries.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: spinlock release channel
Gregory Herrero [Thu, 5 Nov 2015 08:41:41 +0000 (09:41 +0100)]
usb: dwc2: host: spinlock release channel

Prevent dwc2 driver from accessing channel while it frees it.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: fix use of qtd after free in desc dma mode
Gregory Herrero [Thu, 5 Nov 2015 08:41:40 +0000 (09:41 +0100)]
usb: dwc2: host: fix use of qtd after free in desc dma mode

When completing non isoc xfer, dwc2_complete_non_isoc_xfer_ddma()
is relying on qtd->n_desc to process the corresponding number of
descriptors.

During the processing of these descriptors, qtd could be unlinked
and freed if xfer is done and urb is no more in progress.

In this case, dwc2_complete_non_isoc_xfer_ddma() will read again
qtd->n_desc whereas qtd has been freed. This will lead to unpredictable
results since qtd->n_desc is no more valid value.

To avoid this error, return a result != 0 in dwc2_process_non_isoc_desc(),
so that dwc2_complete_non_isoc_xfer_ddma() stops desc processing.

This has been seen with Slub debug enabled.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: rework isochronous halt path
Gregory Herrero [Thu, 5 Nov 2015 08:41:39 +0000 (09:41 +0100)]
usb: dwc2: host: rework isochronous halt path

When a channel is halted because of urb dequeue during transfer
completion, no other qtds must be scheduled until halt is done.
Moreover, all in progress qtds must be given back.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: set active bit in isochronous descriptors
Gregory Herrero [Thu, 5 Nov 2015 08:41:38 +0000 (09:41 +0100)]
usb: dwc2: host: set active bit in isochronous descriptors

Active bit must be enabled in all scheduled descriptors. Else transfer
never start.
Remove previous code which was not correctly configuring descriptors.
Active bit was set before calling dwc2_fill_host_isoc_dma_desc() which
is erasing dma_desc->status.

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc2: host: ensure filling of isoc desc is correctly done
Gregory Herrero [Thu, 5 Nov 2015 08:41:37 +0000 (09:41 +0100)]
usb: dwc2: host: ensure filling of isoc desc is correctly done

Increment qtd->isoc_frame_index_last before testing it, else below
check will never be true and IOC (Interrupt On Complete) bit for
last frame will never be set in descriptor status.

  /* Set IOC for each descriptor corresponding to last frame of URB */
  if (qtd->isoc_frame_index_last == qtd->urb->packet_count)
dma_desc->status |= HOST_DMA_IOC;

Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Gregory Herrero <gregory.herrero@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: misc: usbtest: improve the description for error message
Peter Chen [Wed, 18 Nov 2015 09:40:23 +0000 (17:40 +0800)]
usb: misc: usbtest: improve the description for error message

Now the function of complicated_callback is not only used for iso
transfer, improve the error message to reflect it.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agoDocumentation: usb: gadget-testing: add description for depth of queue
Peter Chen [Thu, 19 Nov 2015 07:02:17 +0000 (15:02 +0800)]
Documentation: usb: gadget-testing: add description for depth of queue

Add both bulk and iso depth of queue for sourcesink.

Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: gadget: f_sourcesink: add queue depth
Peter Chen [Thu, 19 Nov 2015 07:02:16 +0000 (15:02 +0800)]
usb: gadget: f_sourcesink: add queue depth

Add queue depth for both iso and bulk transfer, with more queues, we
can do performance and stress test using sourcesink, and update g_zero
accordingly.

Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: remove dwc3-qcom in favor of dwc3-of-simple
Felipe Balbi [Thu, 19 Nov 2015 18:15:43 +0000 (12:15 -0600)]
usb: dwc3: remove dwc3-qcom in favor of dwc3-of-simple

Now that we have a generic dwc3-of-simple.c, we can
use that instead of maintaining dwc3-qcom.c which is
extremely similar.

Cc: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: doc: dwc3-xilinx: Add devicetree bindings
Subbaraya Sundeep Bhatta [Wed, 18 Nov 2015 12:50:31 +0000 (18:20 +0530)]
usb: doc: dwc3-xilinx: Add devicetree bindings

This patch adds binding doc for Xilinx DWC3 glue driver.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@xilinx.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: add generic OF glue layer
Felipe Balbi [Wed, 18 Nov 2015 19:15:20 +0000 (13:15 -0600)]
usb: dwc3: add generic OF glue layer

For simple platforms which merely enable some clocks
and populate its children, we can use this generic
glue layer to avoid boilerplate code duplication.

For now this supports Qcom and Xilinx, but if we
find a way to add generic handling of regulators and
optional PHYs, we can absorb exynos as well.

Tested-by: Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@xilinx.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: ep0: fix setup_packet_pending initialization
Felipe Balbi [Mon, 16 Nov 2015 22:20:34 +0000 (16:20 -0600)]
usb: dwc3: ep0: fix setup_packet_pending initialization

It just ocurred to me that dwc3 already gives a
really hint of when a setup packet is pending and
that's the SETUP_PENDING TRB Status for EP0 IRQs.

Fix setup_packet_pending initialization based on
that. While at that, also make sure the comment in
gadget.c matches what code is doing.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: gadget: simplify next_request() return check
Felipe Balbi [Mon, 16 Nov 2015 22:13:57 +0000 (16:13 -0600)]
usb: dwc3: gadget: simplify next_request() return check

In dwc3_cleanup_done_reqs() we expect that all
iterations of our while (1) loop will find a valid
struct dwc3_request *. In case we don't, we're
dumping a WARN_ON_ONCE() splat so that people report
the failure.

This patch is a simple cleanup converting:

if (!req) {
WARN_ON_ONCE(1);
return 1;
}

to:

if (WARN_ON_ONCE(!req))
return 1;

which is a little easier to read.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: ep0: purge dev_dbg() calls
Felipe Balbi [Mon, 16 Nov 2015 22:08:09 +0000 (16:08 -0600)]
usb: dwc3: ep0: purge dev_dbg() calls

The last few dev_dbg() messages are converted to
tracepoints and we can finally ignore dev_dbg()
messages during debug sessions.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: core: purge dev_dbg() calls
Felipe Balbi [Mon, 16 Nov 2015 22:06:37 +0000 (16:06 -0600)]
usb: dwc3: core: purge dev_dbg() calls

The last few dev_dbg() messages are converted to
tracepoints and we can finally ignore dev_dbg()
messages during debug sessions.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: gadget: purge dev_dbg() calls
Felipe Balbi [Mon, 16 Nov 2015 22:04:13 +0000 (16:04 -0600)]
usb: dwc3: gadget: purge dev_dbg() calls

The last few dev_dbg() messages are converted to
tracepoints and we can finally ignore dev_dbg()
messages during debug sessions.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agousb: dwc3: gadget: simplify dwc3_gadget_ep_queue()
Felipe Balbi [Mon, 16 Nov 2015 21:31:21 +0000 (15:31 -0600)]
usb: dwc3: gadget: simplify dwc3_gadget_ep_queue()

By moving our sanity checks our internal function
__dwc3_gadget_ep_queue() we can simplify the
externally visible API while also making sure that
callers of __dwc3_gadget_ep_queue() also make use of
the same checks.

Signed-off-by: Felipe Balbi <balbi@ti.com>
9 years agoLinux 4.4-rc5
Linus Torvalds [Mon, 14 Dec 2015 01:42:58 +0000 (17:42 -0800)]
Linux 4.4-rc5

9 years agosched/wait: Fix the signal handling fix
Peter Zijlstra [Sun, 13 Dec 2015 21:11:16 +0000 (22:11 +0100)]
sched/wait: Fix the signal handling fix

Jan Stancek reported that I wrecked things for him by fixing things for
Vladimir :/

His report was due to an UNINTERRUPTIBLE wait getting -EINTR, which
should not be possible, however my previous patch made this possible by
unconditionally checking signal_pending().

We cannot use current->state as was done previously, because the
instruction after the store to that variable it can be changed.  We must
instead pass the initial state along and use that.

Fixes: 68985633bccb ("sched/wait: Fix signal handling in bit wait helpers")
Reported-by: Jan Stancek <jstancek@redhat.com>
Reported-by: Chris Mason <clm@fb.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Tested-by: Chris Mason <clm@fb.com>
Reviewed-by: Paul Turner <pjt@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: tglx@linutronix.de
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: hpa@zytor.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agoMerge tag 'nfs-for-4.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Sun, 13 Dec 2015 20:46:04 +0000 (12:46 -0800)]
Merge tag 'nfs-for-4.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfix from Trond Myklebust:
 "SUNRPC: Fix a NFSv4.1 callback channel regression"

* tag 'nfs-for-4.4-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Fix callback channel

9 years agoMerge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 13 Dec 2015 20:41:10 +0000 (12:41 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fixlets from Thomas Gleixner:
 "Two trivial fixes which add missing header fileas and forward
  declarations so the code will compile even when the magic include
  chains are different"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3: Add missing include for barrier.h
  irqchip/gic-v3: Add missing struct device_node declaration

9 years agoMerge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 13 Dec 2015 20:36:23 +0000 (12:36 -0800)]
Merge branch 'timers-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A single fix to unbreak a clocksource driver which has more than 32bit
  counter width"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: Mmio: remove artificial 32bit limitation

9 years agoMerge tag 'char-misc-4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sun, 13 Dec 2015 20:29:22 +0000 (12:29 -0800)]
Merge tag 'char-misc-4.4-rc5' of git://git./linux/kernel/git/gregkh/char-misc

Pull fpga driver fixes from Greg KH:
 "Only two small fpga driver fixes here, both have been in linux-next
  for a while, and resolve some reported issues"

* tag 'char-misc-4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  fpga manager: Fix firmware resource leak on error
  fpga manager: remove label