Add b_hnp_enable request handling and enable gadget->is_otg
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Init otg_port number of otg capable host to be 1 at host start.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Leave vbus on/off hanlded by OTG fsm if in OTG mode.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch adds OTG fsm related initialization when do otg init,
add a seperate file for OTG fsm related utilities.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch exports symbol of otg_statemachine for kernel module
can use it.
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After the PHY has powered and initialized, it needs some delay
for controller to reflect PHY's status. Some status and values
for id, vbus, dp/dm are only stable after this delay. The current
code tries to clear id/vbus status without enough delay, it
causes the status are not cleared properly.
This patch add 2ms delay after phy has initialized, and clear the
unexpected status after that.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Tested-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch moves usb interrupt enable and status register read functions
from udc driver to core driver to use them in all ci drivers.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use a more general way to read and write otgsc register.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For internal PHY (like UTMI), the phy clock may from internal pll,
it is on/off on the fly, the access PORTSC.PTS will hang without
phy clock. So, the usb_phy_init which will open phy clock needs to
be called before hw_phymode_configure.
See: http://marc.info/?l=linux-arm-kernel&m=139350618732108&w=2
For external PHY (like ulpi), it needs to configure portsc.pts before
visit viewport, or the viewport can't be visited. so phy_phymode_configure
needs to be called before usb_phy_init.
See: cd0b42c2a6
It may not the best solution, but it can work for all situations.
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Chris Ruehl <chris.ruehl@gtsys.com.hk>
Cc: shc_work@mail.ru
Cc: denis@eukrea.com
Cc: festevam@gmail.com
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This adds the i.MX25 and the i.MX35 support in the
ChipIdea usbmisc driver.
The i.MX25 and i.MX35 usb controllers are similar enough to be
able to use the same code.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix driver new_id sysfs-attribute removal deadlock by making sure to
not hold any locks that the attribute operations grab when removing the
attribute.
Specifically, usb_serial_deregister holds the table mutex when
deregistering the driver, which includes removing the new_id attribute.
This can lead to a deadlock as writing to new_id increments the
attribute's active count before trying to grab the same mutex in
usb_serial_probe.
The deadlock can easily be triggered by inserting a sleep in
usb_serial_deregister and writing the id of an unbound device to new_id
during module unload.
As the table mutex (in this case) is used to prevent subdriver unload
during probe, it should be sufficient to only hold the lock while
manipulating the usb-serial driver list during deregister. A racing
probe will then either fail to find a matching subdriver or fail to get
the corresponding module reference.
Since v3.15-rc1 this also triggers the following lockdep warning:
======================================================
[ INFO: possible circular locking dependency detected ]
3.15.0-rc2 #123 Tainted: G W
-------------------------------------------------------
modprobe/190 is trying to acquire lock:
(s_active#4){++++.+}, at: [<c0167aa0>] kernfs_remove_by_name_ns+0x4c/0x94
but task is already holding lock:
(table_lock){+.+.+.}, at: [<bf004d84>] usb_serial_deregister+0x3c/0x78 [usbserial]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (table_lock){+.+.+.}:
[<c0075f84>] __lock_acquire+0x1694/0x1ce4
[<c0076de8>] lock_acquire+0xb4/0x154
[<c03af3cc>] _raw_spin_lock+0x4c/0x5c
[<c02bbc24>] usb_store_new_id+0x14c/0x1ac
[<bf007eb4>] new_id_store+0x68/0x70 [usbserial]
[<c025f568>] drv_attr_store+0x30/0x3c
[<c01690e0>] sysfs_kf_write+0x5c/0x60
[<c01682c0>] kernfs_fop_write+0xd4/0x194
[<c010881c>] vfs_write+0xbc/0x198
[<c0108e4c>] SyS_write+0x4c/0xa0
[<c000f880>] ret_fast_syscall+0x0/0x48
-> #0 (s_active#4){++++.+}:
[<c03a7a28>] print_circular_bug+0x68/0x2f8
[<c0076218>] __lock_acquire+0x1928/0x1ce4
[<c0076de8>] lock_acquire+0xb4/0x154
[<c0166b70>] __kernfs_remove+0x254/0x310
[<c0167aa0>] kernfs_remove_by_name_ns+0x4c/0x94
[<c0169fb8>] remove_files.isra.1+0x48/0x84
[<c016a2fc>] sysfs_remove_group+0x58/0xac
[<c016a414>] sysfs_remove_groups+0x34/0x44
[<c02623b8>] driver_remove_groups+0x1c/0x20
[<c0260e9c>] bus_remove_driver+0x3c/0xe4
[<c026235c>] driver_unregister+0x38/0x58
[<bf007fb4>] usb_serial_bus_deregister+0x84/0x88 [usbserial]
[<bf004db4>] usb_serial_deregister+0x6c/0x78 [usbserial]
[<bf005330>] usb_serial_deregister_drivers+0x2c/0x4c [usbserial]
[<bf016618>] usb_serial_module_exit+0x14/0x1c [sierra]
[<c009d6cc>] SyS_delete_module+0x184/0x210
[<c000f880>] ret_fast_syscall+0x0/0x48
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(table_lock);
lock(s_active#4);
lock(table_lock);
lock(s_active#4);
*** DEADLOCK ***
1 lock held by modprobe/190:
#0: (table_lock){+.+.+.}, at: [<bf004d84>] usb_serial_deregister+0x3c/0x78 [usbserial]
stack backtrace:
CPU: 0 PID: 190 Comm: modprobe Tainted: G W 3.15.0-rc2 #123
[<c0015e10>] (unwind_backtrace) from [<c0013728>] (show_stack+0x20/0x24)
[<c0013728>] (show_stack) from [<c03a9a54>] (dump_stack+0x24/0x28)
[<c03a9a54>] (dump_stack) from [<c03a7cac>] (print_circular_bug+0x2ec/0x2f8)
[<c03a7cac>] (print_circular_bug) from [<c0076218>] (__lock_acquire+0x1928/0x1ce4)
[<c0076218>] (__lock_acquire) from [<c0076de8>] (lock_acquire+0xb4/0x154)
[<c0076de8>] (lock_acquire) from [<c0166b70>] (__kernfs_remove+0x254/0x310)
[<c0166b70>] (__kernfs_remove) from [<c0167aa0>] (kernfs_remove_by_name_ns+0x4c/0x94)
[<c0167aa0>] (kernfs_remove_by_name_ns) from [<c0169fb8>] (remove_files.isra.1+0x48/0x84)
[<c0169fb8>] (remove_files.isra.1) from [<c016a2fc>] (sysfs_remove_group+0x58/0xac)
[<c016a2fc>] (sysfs_remove_group) from [<c016a414>] (sysfs_remove_groups+0x34/0x44)
[<c016a414>] (sysfs_remove_groups) from [<c02623b8>] (driver_remove_groups+0x1c/0x20)
[<c02623b8>] (driver_remove_groups) from [<c0260e9c>] (bus_remove_driver+0x3c/0xe4)
[<c0260e9c>] (bus_remove_driver) from [<c026235c>] (driver_unregister+0x38/0x58)
[<c026235c>] (driver_unregister) from [<bf007fb4>] (usb_serial_bus_deregister+0x84/0x88 [usbserial])
[<bf007fb4>] (usb_serial_bus_deregister [usbserial]) from [<bf004db4>] (usb_serial_deregister+0x6c/0x78 [usbserial])
[<bf004db4>] (usb_serial_deregister [usbserial]) from [<bf005330>] (usb_serial_deregister_drivers+0x2c/0x4c [usbserial])
[<bf005330>] (usb_serial_deregister_drivers [usbserial]) from [<bf016618>] (usb_serial_module_exit+0x14/0x1c [sierra])
[<bf016618>] (usb_serial_module_exit [sierra]) from [<c009d6cc>] (SyS_delete_module+0x184/0x210)
[<c009d6cc>] (SyS_delete_module) from [<c000f880>] (ret_fast_syscall+0x0/0x48)
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If no valid CHID value has previously been set on an HWA, writing a
value of all zeros will cause a kernel panic in uwb_radio_stop because
wusbhc->uwb_rc has not been set. This patch skips the call to
uwb_radio_stop if wusbhc->uwb_rc has not been initialized.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nesting a spin_lock_irq/unlock_irq inside a lock that has already
disabled interrupts will enable interrupts before we are ready when
spin_unlock_irq is called. This patch converts the inner lock to use
spin_lock and spin_unlock instead.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For internal PHY (like UTMI), the phy clock may from internal pll,
it is on/off on the fly, the access PORTSC.PTS will hang without
phy clock. So, the usb_phy_init which will open phy clock needs to
be called before hw_phymode_configure.
See: http://marc.info/?l=linux-arm-kernel&m=139350618732108&w=2
For external PHY (like ulpi), it needs to configure portsc.pts before
visit viewport, or the viewport can't be visited. so phy_phymode_configure
needs to be called before usb_phy_init.
See: cd0b42c2a6
It may not the best solution, but it can work for all situations.
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Chris Ruehl <chris.ruehl@gtsys.com.hk>
Cc: shc_work@mail.ru
Cc: denis@eukrea.com
Cc: festevam@gmail.com
Cc: stable <stable@vger.kernel.org> # 3.14
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Quite a few fixes this time since I lost v3.15-rc2
window.
Most fixes are MUSB which learned to remove its debugfs directories
properly, got a fix for PHY handling and now knows that it should
make sure its clocks aren't gated before trying to access registers.
ffs got a race fix between ffs_epfile_io() and ffs_func_eps_disable().
dwc3 got a fix for system suspend/resume and now only iterates over
valid endpoints when trying to resize TX fifos.
usb_get_phy() now will properly return an error if try_module_get() fails.
We also have a revert for a NAPI conversion on the ethernet gadget which
was causing a kernel BUG.
Signed-of-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'fixes-for-v3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v3.15-rc3
Quite a few fixes this time since I lost v3.15-rc2
window.
Most fixes are MUSB which learned to remove its debugfs directories
properly, got a fix for PHY handling and now knows that it should
make sure its clocks aren't gated before trying to access registers.
ffs got a race fix between ffs_epfile_io() and ffs_func_eps_disable().
dwc3 got a fix for system suspend/resume and now only iterates over
valid endpoints when trying to resize TX fifos.
usb_get_phy() now will properly return an error if try_module_get() fails.
We also have a revert for a NAPI conversion on the ethernet gadget which
was causing a kernel BUG.
Signed-of-by: Felipe Balbi <balbi@ti.com>
According to:"On-The-Go and Embedded Host Supplement to the USB Revision 2.0
Specification July 27, 2012 Revision 2.0 version 1.1a"
- add a_wait_vrise to a_wait_vfall
- update condition from a_wait_vrise to a_wait_bcon
Signed-off-by: Li Jun <b47624@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Facilitate getting required 3.3V and 1.0V VDD supply for
DWC3 controller on Exynos.
With patches for regulators' nodes merged in 3.15:
c8c253f ARM: dts: Add regulator entries to smdk5420
275dcd2 ARM: dts: add max77686 pmic node for smdk5250,
certain perripherals will now need to ensure that,
they request VDD regulators in their drivers, and enable
them so as to make them working.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Anton Tikhomirov <av.tikhomirov@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Depending on PM is not enough, because only PM_RUNTIME could be
selected. Fixes:
drivers/usb/musb/musb_dsps.c:703:12: warning: 'dsps_suspend' defined but not used [-Wunused-function]
drivers/usb/musb/musb_dsps.c:721:12: warning: 'dsps_resume' defined but not used [-Wunused-function]
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
PTR_RET is deprecated. Do not recommend its usage anymore.
Use PTR_ERR_OR_ZERO instead.
Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Glue layers for the DWC3 driver only make sense on specific platforms.
Add dependencies so that they are not built where they aren't needed.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
When the dsps isr sees a babble error, pass it down to the core for
fixup. Also, provide a .reset hook so the core can call us back.
A babble interrupt error occured when a USB mass storage device
("CHIPSBNK v3.3.9.1", 1e3d:2093) was disconnected from a AM33xx host.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: Thomas Mellenthin <mellenthin@teufel.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Handle BABBLE interrupt error conditions from a work struct handler.
This indirection is necessary as we can't be certain that the phy
functions don't sleep.
Platform layer implementation may pass a babble error down to the core
in order to handle it.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Babble interrupts require us to reset the DSPS glue layer. In order to
handle all other recovery tasks independently, add a new hook for
platform-specific implementations of the actual reset.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
As gr_ep_init must be called with dev->lock held, GFP_KERNEL must not be used.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Make gr_ep_enable fail properly when a call requests a larger ep.maxpacket than
ep.maxpacket_limit.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Add information on ep.maxpacket_limit for each endpoint in the debugfs
information.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Use an appropriate accessor function for property arrays to make the code nicer
and make the code correct if it would ever run on little endian architectures.
Suggested by Mark Rutland.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Use platform_get_irq as no mapping needs to be done. No functional difference
for SPARC which is the typical environment for the driver though. Suggested by
Mark Rutland.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Rename struct platform_device pointers from ofdev to pdev for clarity,
while at that, also use platform_set/get_drvdata() helpers.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
it's now very easy to return a platform_device pointer
and have the caller pass it as argument when calling
usb_phy_generic_unregister().
Signed-off-by: Felipe Balbi <balbi@ti.com>
no functional changes, just renaming the function
in order to make it slightly clearer what it should
be used for, also matching the driver name.
Signed-off-by: Felipe Balbi <balbi@ti.com>
We only support GPL drivers in the USB Gadget Framework,
it sounds correct to make all exported symbols GPL too.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Move mode (Host, Peripheral, OTG) initialization
to its own function in order to decrease the size
of our probe() routine.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Tests have shown that when a power-up transition is followed by other
PHY operations too quickly, the USB port appears dead. Waiting 1ms fixes
this problem.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: stable@vger.kernel.org [3.14]
Signed-off-by: Felipe Balbi <balbi@ti.com>
This patch reduce unecessary NETTX softirq call caused by
free skb header. You will see this softirq comes twice while
there is only one TX packet to be transmitted.
So using dev_kfree_skb() instead of dev_kfree_skb_any() to
avoid this problem.
Cc: David S. Miller <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Macpaul Lin <macpaul@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This fix the fsl usb gadget driver in a way that the usb device
will be only "pulled up" on requests only when vbus is powered
Signed-off-by: Suresh Gupta <suresh.gupta@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
There are also two allocations with GFP_KERNEL in the pre-/post_reset
code paths. That is no good because that is a part of the SCSI error handler.
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
intfdata is set only after scsi_scan(). uas_pre_reset() however
needs intfdata to be valid and will follow the NULL pointer
killing khubd. intfdata must be preemptively set before the
host is registered and undone in the error case.
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Quote Dan:
The patch e36e64930c: "uas: Use GFP_NOIO rather then GFP_ATOMIC
where possible" from Nov 7, 2013, leads to the following static
checker warning:
drivers/usb/storage/uas.c:806 uas_eh_task_mgmt()
error: scheduling with locks held: 'spin_lock:lock'
Some other allocations under spinlock are not caught.
The fix essentially reverts e36e64930c
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
By specifying NO_UNION_NORMAL the ACM driver does only use the first two
USB interfaces (modem data & control). The AT Port, Diagnostic and NMEA
interfaces are left to the USB serial driver.
Signed-off-by: Michael Ulbricht <michael.ulbricht@systec-electronic.com>
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Power control of hub ports target the CLEAR_FEATURE and SET_FEATURE
requests to ports, not to the hub. Fix the hub control function to
detect the request correctly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The ret variable is not initialized in all code paths of the
ohci_jz4740_hub_control function. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
