future patches will remove the extra 'driver'
argument to ->udc_stop(), in order to do that,
we must make sure that our UDC does not rely
on it first.
Signed-off-by: Felipe Balbi <balbi@ti.com>

future patches will remove the extra 'driver'
argument to ->udc_stop(), in order to do that,
we must make sure that our UDC does not rely
on it first.
Signed-off-by: Felipe Balbi <balbi@ti.com>

future patches will remove the extra 'driver'
argument to ->udc_stop(), in order to do that,
we must make sure that our UDC does not rely
on it first.
Signed-off-by: Felipe Balbi <balbi@ti.com>

future patches will remove the extra 'driver'
argument to ->udc_stop(), in order to do that,
we must make sure that our UDC does not rely
on it first.
Signed-off-by: Felipe Balbi <balbi@ti.com>

The drivers should use dmaengine_terminate_all() or dmaengine_slave_config()
API instead of accessing the device_control which will be deprecated soon
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

The memory subsystem has already had similar message for it.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Some gadget/function drivers might want to do
improper request recycling by allocating a single
request from one particular endpoint and queueing
it to another completely unrelated endpoint.

One such case was found with f_loopback.c.

To prevent such cases from happening again, let's
WARN() so we get a loud enough failure and persuade
users to report errors.
Signed-off-by: Felipe Balbi <balbi@ti.com>

whenever we get a Disconnect Interrupt, we should
make sure to update out udc state to NOT_ATTACHED,
otherwise sysfs will show wrong values.
Signed-off-by: Felipe Balbi <balbi@ti.com>

I noticed that this has been missing for quite
some time so I decided it was about time to
document it.
Signed-off-by: Felipe Balbi <balbi@ti.com>

USB gadgets composed with configfs lack suspend and resume
methods. This patch uses composite_suspend()/composite_resume()
the same way e.g. composite_setup() or composite_disconnect()
are used in a configfs-based gadget.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

This NULL check sets off a static checker warning because we already
dereferenced "card" earlier in the function.  However, since "card" is
never NULL so we can just remove the check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

when disconnecting from host using our soft_connect
sysfs interface, also let the gadget driver know about
it by calling the gadget driver's ->disconnect()
method.

No problems have been found while not calling ->disconnect()
so far, it's just good convention.
Signed-off-by: Felipe Balbi <balbi@ti.com>

Using ->prepare()/->complete() to mask/unmask
IRQs is wrong at least for dwc3. We need to
make sure that by the end of ->resume(), IRQs
are working and ready to fire because a child
device may need working IRQs for its own ->resume()
method.
Signed-off-by: Felipe Balbi <balbi@ti.com>

Enabling the core interrupts in complete is too late for
XHCI, and stops it from proper operation. The root of the
problem is due to a disagreement between dwc3-omap and XHCI
about when IRQs should be enabled.

As it turns out, ->resume's documentation states that:

"... generally the driver is expected to start working
again, responding to hardware events and software requests
(the device itself may be left in a low-power state, waiting
for a runtime resume to occur) ..."

From that we infer that IRQs must be unmasked by the end of
->resume().

Due to that, we will remove ->prepare() and ->complete() and
disable/enable interrupts in ->suspend()/->resume().
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Add support for device-tree device discovery. If devicetree is not
provided, fallback to legacy platform data "discovery".
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: devicetree@vger.kernel.org
Signed-off-by: Felipe Balbi <balbi@ti.com>

Convert the mach info, and store the udc_command in the pxa_udc control
structure.

It is to be noticed that the udc_is_connected() in mach info is not
transfered. This was not used, as mioa701 machine doesn't need it,
balloon3 doesn't really use it, and most importantly the current driver
never uses it.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>

For this preparation, a preliminary cleanup is done :
  - convert the probing of pxa27x_udc to gpio_desc.
    The conversion is partial because :
     - the platform data still provides a gpio number, not a gpio desc
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>

This patch adds support for the generic PHY. The generic PHY will be
used in multiplatform environment.
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

To support both usb PHY and generic PHY, this patch cleans up rcar2.c.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

To support a generic phy driver in this driver later, this patch
renames "struct usb_phy *phy" to "struct usb_phy *usb_phy".
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Add TRB tracepoints for ep0 TRBs as that
might help finding bugs with ep0 handling.
Signed-off-by: Felipe Balbi <balbi@ti.com>

In case we unload a gadget driver while any of
os_desc_req or req are still pending, we need
to make sure to dequeue them.

By using our setup_pending and os_desc_pending
flags we achieve that in a way that doesn't
cause any regressions because we won't dequeue
a request which was already completed.

The original idea came from Li Jun's commit
f2267089
(usb: gadget: composite: dequeue cdev->req
before free it in composite_dev_cleanup) which,
unfortunately, caused two regressions (kfree()
being called before usb_ep_dequeue() and calling
usb_ep_dequeue() when the request was already
completed). That commit also didn't take care
of os_desc_req which can fall into the same
situation so we must care for that one too.

Note that in order to make code slightly easier
to read, we introduce composite_ep_queue() which
hides details about how to fiddle with our pending
flags.
Signed-off-by: Felipe Balbi <balbi@ti.com>

by doing that we will be able to match our
requests against req and os_desc_req and also
clear our pending flags from complete callback.
Signed-off-by: Felipe Balbi <balbi@ti.com>