With this commit: cccad6d4b1
usb: otg: notifier: switch to atomic notifier
Following dumps are observed on attach/detach for MUSB HOST
mode and on a detach for MUSB Device mode.
BUG: sleeping function called from invalid context at kernel/mutex.c:85
where, the source is:
twl6030_usb_irq
->atomic_notifier_call_chain
->musb_otg_notifications
->twl6030_set_vbus
->twl_i2c_write_u8
->mutex_lock
This patch moves the i2c writes in set_vbus function to a
work-queue thereby avoiding I2C writes in atomic context.
Tested HOST and Device mode functionality on OMAP4460
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The twl6025 uses a different regulator for USB than the 6030 so select
the correct regulator name depending on the subclass of device.
Since V1
Use features passed via platform data instead of global variable.
Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Implement the start_srp API to generate the VBUS pulsing and assign it to
otg_transciever function pointer. This will be used by the link driver when
there is SRP initiation from user.
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Fix warning caused by stray semi-colon at end of macro:
drivers/usb/otg/twl6030-usb.c:183: warning: ISO C90 forbids mixed declarations and code
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Hema HK <hemahk@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Save the last event in the otg_transceiver so that it can used in the
musb driver and gadget driver to configure the musb and enable the
vbus for host mode and OTG mode, if the device is connected during boot.
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Introduce the twl6030_phy_suspend function and assign to otg.set_suspend
function pointer.
This function is used by the musb-omap2430 platform driver
during suspend/resume.
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
To get the ID status there was an I2C read transfer. Removed this I2C
read transfer as this info can be used from existing variable(linkstat).
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Remove the regulator enable while driver loading and enable it only when
the cable/device is connected and disable it when disconnected.
Remove the configuration of config_state and config_trans register
configuration as these registers are programmed when regulator
enable/disable is called.
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Adding the twl6030-usb transceiver support for OMAP4 musb driver.
OMAP4 supports 2 types of transceiver interface.
1. UTMI: The PHY is embedded within OMAP4. The transceiver functionality
is split between the twl6030 PMIC chip and OMAP4430. The VBUS, ID pin
sensing and OTG SRP generation part is integrated in TWL6030 and UTMI PHY
functionality is embedded within the OMAP4430.
There is no direct interactions between the MUSB controller and TWL6030
chip to communicate the session-valid, session-end and ID-GND events.
It has to be done through a software by setting/resetting bits in
one of the control module register of OMAP4430 which in turn toggles
the appropriate signals to MUSB controller.
The internal transceiver has functional clocks and
powerdown bits to powerdown the PHY for power saving.
Since there is no option available for having 2 transceiver drivers
for one USB controller, internal PHY specific APIs are passed through
plaform_data function pointers to use in the twl6030-usb transceiver
driver.
2. ULPI interface is provided for off-chip transceivers.
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Felipe Balbi <balbi@ti.com>
