Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size
instead of le16_to_cpu(desc->wMaxPacketSize).
This patch fix it up
Cc: Armin Fuerst <fuerst@in.tum.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Erdfelt <johannes@erdfelt.com>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Oliver Neukum <oliver@neukum.name>
Cc: David Kubicek <dave@awk.cz>
Cc: Johan Hovold <jhovold@gmail.com>
Cc: Brad Hards <bhards@bigpond.net.au>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: David Lopo <dlopo@chipidea.mips.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Xie Xiaobo <X.Xie@freescale.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Jiang Bo <tanya.jiang@freescale.com>
Cc: Yuan-hsin Chen <yhchen@faraday-tech.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Thomas Abraham <thomas.ab@samsung.com>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: Roman Weissgaerber <weissg@vienna.at>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: Florian Floe Echtler <echtler@fs.tum.de>
Cc: Christian Lucht <lucht@codemercs.com>
Cc: Juergen Stuber <starblue@sourceforge.net>
Cc: Georges Toth <g.toth@e-biz.lu>
Cc: Bill Ryder <bryder@sgi.com>
Cc: Kuba Ober <kuba@mareimbrium.org>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
an 'unhandled fault' is causes when a gadget driver calls
usb_gadget_connect() while the USB cable isn't plugged into
the OTG port.
the fault is caused by an access to MUSB's memory space
while its clock is turned off due to pm_runtime kicking
in.
in order to fix the fault, we enclose musb_gadget_pullup()
with pm_runtime_get_sync() ... pm_runtime_put() calls to
be sure we will always reach that path with clock turned on.
[ balbi@ti.com : simplified commit log; removed few things
which didn't belong there ]
Cc: stable@kernel.org
Reported-by: Zach Pfeffer <zach.pfeffer@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
After 622859634 (usb: musb: drop a gigantic amount of ifdeferry):
- USB_GADGET_MUSB_HDRC is no longer selectable because it
depends on the removed USB_MUSB_PERIPHERAL and USB_MUSB_OTG
options
- The Kconfig comment still says "Enable Host or Gadget support
to see Inventra options", even though you now need to enable
both of them to see Inventra options.
Fix the dependency and drop the anyway unnecessary comment.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Felipe Balbi <balbi@ti.com>
CC drivers/usb/musb/tusb6010_omap.o
drivers/usb/musb/tusb6010_omap.c: In function 'tusb_omap_use_shared_dmareq':
drivers/usb/musb/tusb6010_omap.c:92: error: 'musb' undeclared (first use in this function)
drivers/usb/musb/tusb6010_omap.c:92: error: (Each undeclared identifier is reported only once
drivers/usb/musb/tusb6010_omap.c:92: error: for each function it appears in.)
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Restoring the missing INDEX register value in musb_restore_context().
Without this suspend resume functionality is broken with offmode
enabled.
Cc: stable@kernel.org
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
dev_get_drvdata() is exactly the same as
platform_get_drvdata(). Drop that useless
access to the platform device.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
udc-core checks for valid callbacks so there is no need for the driver
to do so. Also "can-be-bound-once" is verified by udc-core. The pull-up
callback is called by udc-core afterwords.
[ balbi@ti.com : keep holding gadget_driver pointer for now
remove the stupid check for gadget_driver otherwise
we don't handle IRQs ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
When we start building glue layers as modules,
we need to be careful with the fifo_mode changes
otherwise that weird ifdeferry won't evaluate
correctly. Add the missing _MODULE variants for
all glue layers to prevent everybody from using
fifo_mode 2.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
the MUSB IP is always OTG, so there's no point
in adding so many ifdefs on the code. Drop those
and always compile the driver for OTG support.
This also allows us to drop the useless "driver
mode" choice. For doing that, we need to make
musb depend on both Host and Peripheral side.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
if we have more endpoints configured than
enabled on fifo_mode, then we need to be
careful on save/restore context operations,
otherwise we will try to access uninitialized
__iomem pointer.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The "channel_program" member was renamed to "adjust_channel_params",
but the documentation wasn't updated.
Reported-by: Sergei Shtylyov <sshtylyov@mvista.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
peripheral drivers are using usb_add_gadget()/usb_del_gadget() to
register/unregister to the udc-core.
The udc-core will take the first available gadget driver and attach
function driver which is calling usb_gadget_register_driver(). This is
the same behaviour we have right now.
Only dummy_hcd was tested, the others were compiled tested.
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Anton Tikhomirov <av.tikhomirov@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
Cc: Roy Huang <roy.huang@analog.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Toshiharu Okada <toshiharu-linux@dsn.okisemi.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Cc: Yuan-Hsin Chen <yhchen@faraday-tech.com>
Cc: cxie4 <cxie4@marvell.com>
Cc: linux-geode@lists.infradead.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Fixes mis-use of MUSB's hardware feature where it won't
flush FIFOs when TXPKTRDY flag was set before and we are
flushing setting both FLUSHFIFO and TXPKTRDY.
In other words, we need to ensure that when we try to
flush FIFOs, we don't accidentaly set TXPKTRDY bit too
due to a read-back of the register.
The MUSB Programming Guide says "May be set simultaneously
with TxPktRdy to abort the packet that is currently being
loaded into the FIFO". This is a situation where TXPKTRDY
hasn't been set yet, but some data already loaded into the
fifo. It looks, that if TXPKTRDY has been set before, and
there is no loading in progress, but we set FLUSHFIFO with
the TXPKTRDY, controller tries to use the same logic to
abort loading and as the result just does nothing (because
there is no packet been loaded currently)
Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
[ balbi@ti.com : fixed one whitespace git complained about
improved the commit log slightly ]
Signed-off-by: Felipe Balbi <balbi@ti.com>
Variable d is a struct usb_iso_packet_descriptor. The status filed is usually
negative when an error happens.
Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
After the prefetch/list.h restructure, drivers need to explicitly include
linux/prefetch.h in order to use the prefetch() function. Otherwise, the
current driver fails to build:
drivers/usb/musb/musb_core.c: In function 'musb_write_fifo':
drivers/usb/musb/musb_core.c:219: error: implicit declaration of function 'prefetch'
make[3]: *** [drivers/usb/musb/musb_core.o] Error 1
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Unaligned sizes and buffers are not supported and they will be filtered
out by is_compatible().
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Although U8500 and U5500 platforms use paltform dma, Inventra dma specific code
can work for them for the most part. Only difference is for the Rx path where
this patch is making use of request->short_not_ok to select dma mode.
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
commit 35a83365da6aa10095c6138cc428c15853409c32
(usb: musb: drop unneeded musb_debug trickery)
introduced a compile error for blackfin and
tusb6010 glue layers. Fix it.
Reported-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
musb_ep_program() contains obviously duplicate check for 'dma_channel' in its
IN/receive path -- removing it allows to save one level of indentation. While
at it, improve the comment style...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
currently that's used by another module
(am35x) which, granted, it shouldn't be
using that, but in order to avoid compile
errors, let's export that symbol temporarily
until re-factoring work is done on that
driver.
Signed-off-by: Felipe Balbi <balbi@ti.com>
This in part reverts commit 7a180e70cf.
(usb: musb: temporarily make it bool) and while
at that we also allow glue layers to be compiled
as modules.
There are still some other changes needed
until we can have a fully functional build
with this setup, but we're getting there.
Signed-off-by: Felipe Balbi <balbi@ti.com>
We have a generic way of enabling/disabling
different debug messages on a driver called
DYNAMIC_PRINTK. Anyone interested in enabling
just part of the debug messages, please read
the documentation under:
Documentation/dynamic-debug-howto.txt
for information on how to use that great
infrastructure.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Commit 3dacdf11 "usb: factor out state_string() on otg drivers"
broke building musb drivers since there is already another
otg_state_string() function in musb drivers, but with different
prototype. Fix musb drivers to use common otg_state_string(), too.
Also provide a nop for otg_state_string() if CONFIG_USB_OTG_UTILS
is not defined.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
If cable is not connected to peripheral only board when initializing the
gadget driver, then runtime pm calls are out-of-sync and the musb cannot
idle with omap2430.c. This was noted on Nokia N900 where musb prevented the
CPU to be able to enter deeper retention idle state.
This was working in 2.6.38 before runtime pm conversions but there musb
smart standby/idle modes were configured statically where they are now
updated runtime depending on use and cable status.
Reason for out-of-sync is that runtime pm is activated in function
musb_gadget.c: usb_gadget_probe_driver but suspended only in OTG mode if
cable is not connected when initializing. In peripheral only mode this leads
to out-of-sync runtime pm since runtime pm remain active and is activated
another time in omap2430.c: musb_otg_notifications for VBUS Connect event
and thus cannot suspend for VBUS Disconnect event since the use count remains
active.
Fix this by moving cable status check and pm_runtime_put call in
usb_gadget_probe_driver out of is_otg_enabled block.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Recent runtime pm and hwmod conversions for 2.6.39 broke the musb peripheral
mode OMAP retention idle on boards where the board mode in struct
musb_hdrc_platform_data is set to MUSB_PERIPHERAL.
These conversions changed the way how the OTG_SYSCONFIG register is
configured and used in runtime. Before 2.6.39 smart standby/idle modes were
activated statically in OTG_SYSCONFIG. Those modes allow that the musb is
able to idle when peripheral device is not connected to host.
In 2.6.39 the OTG_SYSCONFIG is updated runtime depending on VBUS status.
No standby/idle modes are used when device is connected and force
standby/idle when disconnected.
Unfortunately VBUS disconnect event that handles the disconnect case lets
the peripheral musb to idle only when board mode is MUSB_OTG. Fix this by
checking the peripheral mode also.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Fix build failure introduced by commit
7acc6197b7 (usb: musb: Idle path retention
and offmode support for OMAP3) when building without gadget
support.
CC drivers/usb/musb/omap2430.o
drivers/usb/musb/omap2430.c: In function ‘musb_otg_notifications’:
drivers/usb/musb/omap2430.c:262: error: ‘struct musb’ has no member named ‘gadget_driver’
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
DMA mode 1 data corruption anomaly on Blackfin systems. This issue is
specific to the Blackfin silicon as the bug appears to be related to the
connection of the musb ip to the bus/dma fabric.
Data corruption when using USB DMA mode 1. (Issue manager 17-01-0105)
DMA mode 1 allows large size transfers to generate a single interrupt
at the end of the entire transfer. The transfer is split up in packets
of length specified in the Maximum Packet Size field for that endpoint.
If the transfer size is not an integer multiple of the Maximum Packet
Size, a short packet will be present at the end of the transfer.
Under certain conditions this packet may be corrupted in the USB FIFO.
Workaround:
Use DMA mode 1 to transfer (n* Maximum Packet Size) and schedule DMA
mode 0 to transfer the short packet.
As an example if your transfer size is 33168 bytes and Maximum Packet
Size equals 512, schedule [33168 - (33168 mod 512)] in DMA mode 1 and
the remainder (33168 mod 512) in DMA mode 0.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
We are now using our own list_head, so we should
be checking against that, not the gadget driver's
list_head.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Due to the recent changes to musb's glue layers,
we can't compile musb-hdrc as a module - compilation
will break due to undefined symbol musb_debug. In
order to fix that, we need a big re-work of the
debug support on the MUSB driver.
Because that would mean a lot of new code coming
into the -rc series, it's best to defer that to
next merge window and for now just disable module
support for MUSB.
Once we get the refactor of the debugging support
done, we can simply revert this patch and things
will go back to normal again.
Cc: stable@kernel.org # v2.6.38
Signed-off-by: Felipe Balbi <balbi@ti.com>
"tx_ram" points to io memory. We can't dereference it directly. Sparse
complains about this: "drivers/usb/musb/cppi_dma.c:1205:25: warning:
dereference of noderef expression"
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Gcc gives the following warnings:
drivers/usb/musb/cppi_dma.c: In function ‘cppi_next_tx_segment’:
drivers/usb/musb/cppi_dma.c:600: warning: format ‘%x’ expects type ‘unsigned int’, but argument 8 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c: In function ‘cppi_next_rx_segment’:
drivers/usb/musb/cppi_dma.c:822: warning: format ‘%x’ expects type ‘unsigned int’, but argument 9 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c: In function ‘cppi_rx_scan’:
drivers/usb/musb/cppi_dma.c:1042: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 4 has type ‘dma_addr_t’
drivers/usb/musb/cppi_dma.c:1114: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 7 has type ‘dma_addr_t’
dma_addr_t is sometimes 32 bit and sometimes 64. We normally cast them
to unsigned long long for printk().
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
On the completion of tx dma, dma is disabled by clearing MUSB_TXCSR_DMAENAB in
TXCSR. If MUSB_TXCSR_AUTOSET was set in txstate() it will remain set although
it is not needed in PIO mode. Clear it as soon as it is not needed.
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The common code has a "get" in the middle, but each implementation
does not have it.
Cc: stable@kernel.org
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Cc: stable@kernel.org
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The modularization of the Blackfin driver set the name to "musb-blackfin"
in all the boards, but "musb-bfin" in the driver itself. Since the driver
file name uses "blackfin", change the driver to "musb-blackfin". This is
also easier as it's only one file to change.
Cc: stable@kernel.org
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
There was conflict while merging 2 patches. Enabling vbus code
is wrongly moved to error check if loop.
This is a fix to resolve the merge issue.
Signed-off-by: Hema HK <hemahk@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Update the USB core to deal with USB 3.0 hubs. These hubs have a slightly
different hub descriptor than USB 2.0 hubs, with a fixed (rather than
variable length) size. Change the USB core's hub descriptor to have a
union for the last fields that differ. Change the host controller drivers
that access those last fields (DeviceRemovable and PortPowerCtrlMask) to
use the union.
Translate the new version of the hub port status field into the old
version that khubd understands. (Note: we need to fix it to translate the
roothub's port status once we stop converting it to USB 2.0 hub status
internally.)
Add new code to handle link state change status. Send out new control
messages that are needed for USB 3.0 hubs, like Set Hub Depth.
This patch is a modified version of the original patch submitted by John
Youn. It's updated to reflect the removal of the "bitmap" #define, and
change the hub descriptor accesses of a couple new host controller
drivers.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: "Robert P. J. Day" <rpjday@crashcourse.ca>
Cc: Max Vozeler <mvz@vozeler.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Anton Vorontsov <avorontsov@mvista.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Cc: Olav Kongas <ok@artecdesign.ee>
Cc: Martin Fuzzey <mfuzzey@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brownell <dbrownell@users.sourceforge.net>
In OMAP3xxx with OTG mode or host only mode, When the device
is inserted after the gadget driver loading the enumeration was not
through. This is because the mentor controller will start sensing the
ID PIN only after setting the session bit.
So after ID-GND, need to set the session bit for mentor to get it
configured as A device.
This is a fix to set the session bit again in ID_GND notification handler.
Tested with OMAP3630Zoom3 platform.
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch supports the retention and offmode support in the idle path for
musb driver using runtime pm APIs.
This is restricted to support offmode and retention only when device not
connected.When device/cable connected with gadget driver loaded,configured
to no idle/standby which will not allow the core transition to retention
or off.
There is no context save/restore done by hardware for musb in OMAP3
and OMAP4,driver has to take care of saving and restoring the context
during offmode.
Musb has a requirement of configuring sysconfig register to force
idle/standby mode and set the ENFORCE bit in module STANDBY register
for retention and offmode support.
Runtime pm and hwmod frameworks will take care of configuring to force
idle/standby when pm_runtime_put_sync is called and back to no
idle/standby when pm_runeime_get_sync is called.
Compile, boot tested and also tested the retention in the idle path on
OMAP3630Zoom3. And tested the global suspend/resume with offmode enabled.
Usb basic functionality tested on OMAP4430SDP.
There is some problem with idle path offmode in mainline, I could not test
with offmode. But I have tested this patch with resetting the controller
in the idle path when wakeup from retention just to make sure that the
context is lost, and restore path is working fine.
Removed .suspend/.resume fnction pointers and functions because there
is no need of having these functions as all required work is done
at runtime in the driver.
There is no need to call the runtime pm api with glue driver device
as glue layer device is the parent of musb core device, when runtime apis
are called for the child, parent device runtime functionality
will be invoked.
Design overview:
pm_runtime_get_sync: When called with musb core device takes care of
enabling the clock, calling runtime callback function of omap2430 glue
layer, runtime call back of musb driver and configure the musb sysconfig
to no idle/standby
pm_runtime_put: Takes care of calling runtime callback function of omap2430
glue layer, runtime call back of musb driver, Configure the musb sysconfig
to force idle/standby and disable the clock.
During musb driver load: Call pm_runtime_get_sync.
End of musb driver load: Call pm_runtime_put
During gadget driver load: Call pm_runtime_get_sync,
End of gadget driver load: Call pm_runtime_put if there is no device
or cable is connected.
During unload of the gadget driver:Call pm_runtime_get_sync if cable/device
is not connected.
End of the gadget driver unload : pm_runtime_put
During unload of musb driver : Call pm_runtime_get_sync
End of unload: Call pm_runtime_put
On connect of usb cable/device -> transceiver notification(VBUS and ID-GND):
pm_runtime_get_sync only if the gadget driver loaded.
On disconnect of the cable/device -> Disconnect Notification:
pm_runtime_put if the gadget driver is loaded.
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
For OMAP3 and OMAP4 for offmode and retention support, musb
sysconfig is configured to force idle and standby with ENABLE_FORCE bit
of OTG_FORCESTNDBY set.
And on wakeup configure to no ilde/standby with resetting the ENABLE_FORCE
bit. There is not need to save and restore of this register anymore
so removed omap2430_save_context/omap2430_restore_context functions.
and also removed otg_forcestandby member of musb_context_registers
structure
Signed-off-by: Hema HK <hemahk@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Kuninori Morimoto