The atomic notifier from twl4030/twl6030 to notifiy VBUS and ID events,
is replaced by a direct call to omap musb blue.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Add a linked list for keeping multiple PHY instances with different
types so that we can have separate USB2 and USB3 PHYs on one single
board. _get_phy_ has been changed so that the controller gets
the transceiver by type. _remove_phy_ has been added to let the phy
be removed from the phy list.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

_transceiver() in otg.c is replaced with _phy. usb_set_transceiver is
replaced with usb_add_phy to make it similar to other usb standard
function names like usb_add_hcd.
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

The flag of IRQF_ONESHOT should be passed to request_threaded_irq,
otherwise the following failure message will be dumped because
hardware handler is defined as NULL:

[    2.271148] genirq: Threaded irq requested with handler=NULL and
!ONESHOT for irq 356
[    2.279541] twl6030_usb twl6030_usb: can't get IRQ 356, err -22
[    2.285919] twl6030_usb: probe of twl6030_usb failed with error -22

The patch fixes the twl6030-usb probe failure.
Signed-off-by: NMing Lei <ming.lei@canonical.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Use struct usb_otg members with OTG specific functions instead
of usb_phy members.
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Tested-by: NKishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: NMarek Vasut <marek.vasut@gmail.com>
Cc: Hema HK <hemahk@ti.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

This is the first step in separating USB transceivers from
USB OTG utilities.

Includes fixes to IMX code from Sascha Hauer.
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Acked-by: NPavankumar Kondeti <pkondeti@codeaurora.org>
Acked-by: NLi Yang <leoli@freescale.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Acked-by: NIgor Grinberg <grinberg@compulab.co.il>
Reviewed-by: NMarek Vasut <marek.vasut@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

Remove the unused function twl6030_set_phy_clk of twl6030-usb.c.
Signed-off-by: NWanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

With this commit: cccad6d4
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: NMoiz Sonasath <m-sonasath@ti.com>
Signed-off-by: NGreg 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: NGraeme Gregory <gg@slimlogic.co.uk>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NLiam 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: NHema HK <hemahk@ti.com>
Signed-off-by: NFelipe 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: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: Hema HK <hemahk@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

most of our notifications, will be called from IRQ
context, so an atomic notifier suits the job better.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

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: NHema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NFelipe 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: NHema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NFelipe 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: NHema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NFelipe 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: NHema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: NFelipe 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: NHema HK <hemahk@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NFelipe Balbi <balbi@ti.com>