EHCI: HSIC: Prevent disabling wakeup irq twice

If PM resume and Wakeup irq happen at same time
its possible to disable wakeup irq twice. Prevent
the same by protecting with spinlock

CRs-Fixed: 396895
Change-Id: I3320478d6c770787bc571964f4a38dce6927af63
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
(cherry picked from commit d343c01025fc3bb597fbb60c8fc4369cc17cbf5d)

Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>

Conflicts:
	drivers/usb/host/ehci-msm-hsic.c
EHCI: HSIC: Add enhancements to debug logging

This change addresses following enhancements to debug
logging:-

1) Add data payload logging which is not currently
supported. This helps to sniff first 32 bytes of data
being sent and received. Data payload logging is
enabled by default. To disable data payload logging:-

echo 0 > /sys/module/ehci_hcd/parameters/enable_payload_log

2) Current urb submission event logging does not cover
root hub submissions, hence move urb submission logging
to hcd driver.

3) Current urb submission event logging does not return
the correct status if submission fails. Hence log the
return status of urb submission.

CRs-Fixed: 393294
Change-Id: Ic7e555e1545ec7d7b0e4042cd35235e0af26fb01
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
(cherry picked from commit 4d50a43dce8645955d8ed739d7a183e62922c721)

Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
EHCI: HSIC: Handle wakeup interrupt properly during probe

During HSIC probe driver registers the level triggered interrupt
on wakeup gpio. Wakeup irq line is disabled based on the return
status of interrupt registration. There is a possibility that
wakeup gpio is already pulled high after registering the interrupt
which can cause wakeup interrupts to be fired on continuously
without getting chance to disable the irq line. Hence do not
enable wake up interrupt on request irq.

CRs-Fixed: 394540
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
(cherry picked from commit bbcdcbc3f09cc90d4b8fdd607244c3d73c9ae801)

Conflicts:

	drivers/usb/host/ehci-msm-hsic.c

Change-Id: I9b20d54d919333d11201d30513b4111f3fb31df3
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
EHCI: HSIC: Fail root hub bus suspend when port is not enabled

HSIC controller can not detect HSIC device in low power mode.  Hence
controller suspend is allowed only when port is enabled.  But this
check is done in controller suspend routine.  Controller suspend is
attempted after root hub bus is suspended.  Even if we fail, controller
suspend, root hub bus remains in suspend state.  This would delay
the enumeration of HSIC device as root hub bus resume takes some time.

CRs-Fixed: 396444
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
(cherry picked from commit a723f744025854c7132410fd1699bc0997617fb9)

Change-Id: I30c2117a0a6debfbc98a08610a83b56d5ac75f5b
Signed-off-by: Sudhir Sharma <sudsha@codeaurora.org>
USB: Prevent system suspend when HSIC device is active

Some buses like HSIC would like to keep device in suspend state
after system resume.  The remote wakeup or interface activity
later will auto resume the device.  This will work only if the
device is auto suspended before system suspend.  If the device
runtime state had been active during system suspend and system
suspend routine put the device in suspend, it will not be resumed
during system resume.  When remote wakeup happen for this device,
the runtime resume will not bring the device to active as runtime
core think it is already active.

The HSIC bus ensure that device is auto suspended prior to system
suspend by holding a wakelock till the bus is suspended.  HSIC bus
is not handling the case where device is auto resumed immediately
after system suspend begins.  HSIC bus simply put the device into
suspend in system suspend routine.

This patch fixes above issue by returning an error code if the device
is not auto suspended during system suspend.  Also add a safe guard
check in HSIC system resume routine to skip device resume only if it
is auto suspended prior to system suspend.

(cherry picked from commit 41d004c4eaa5565cb8d9113862c3cef1e51be648)
CRs-Fixed: 422876

Change-Id: I07063d1fe2ef054adc5c593691d417272e66221e
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Neha Pandey <nehap@codeaurora.org>