linux-toradex.git/include/linux/usb/gadget.h, branch v4.6-rc2

usb: gadget: add hnp_polling_support and host_request_flag in usb_gadget

2016-03-04T13:14:35+00:00

Add 2 flags for USB OTG HNP polling, hnp_polling_support is to indicate
if the gadget can support HNP polling, host_request_flag is used for
gadget to store host request information from application, which can be
used to respond to HNP polling from host.

Acked-by: Peter Chen 
Signed-off-by: Li Jun 
Signed-off-by: Felipe Balbi

usb: gadget: provide interface for legacy gadgets to get UDC name

2016-03-04T13:14:35+00:00

Since commit 855ed04a3758b205e84b269f92d26ab36ed8e2f7 ("usb: gadget:
udc-core: independent registration of gadgets and gadget drivers") gadget
drivers can not assume that UDC drivers are already available on their
initialization. This broke the HACK, which was used in gadgetfs driver,
to get UDC controller name. This patch removes this hack and replaces it
by additional function in the UDC core (which is usefully only for legacy
drivers, please don't use it in the new code).

Reported-by: Vegard Nossum 
Signed-off-by: Marek Szyprowski 
Tested-by: Vegard Nossum 
Signed-off-by: Felipe Balbi

usb: gadget: Update usb_assign_descriptors for SuperSpeedPlus

2016-03-04T13:14:23+00:00

Add the 'ssp_descriptors' parameter to the usb_assign_descriptors()
function. This allows a function driver to add descriptors for
SuperSpeedPlus speeds if it supports it.

Also update all uses of this function in the gadget subsystem so that
they pass NULL for the ssp_descriptors parameters.

Signed-off-by: John Youn 
Signed-off-by: Felipe Balbi

usb: gadget: Add gadget_is_superspeed_plus()

2016-03-04T13:14:22+00:00

Add a function to check for SuperSpeedPlus capable gadgets.

Signed-off-by: John Youn 
Signed-off-by: Felipe Balbi

usb: gadget: forbid queuing request to a disabled ep

2015-12-22T18:04:05+00:00

Queue a request to disabled ep  doesn't make sense, and induce caller
make mistakes.

Here is a example for the android mtp gadget function driver. A mem
corruption can happen on below senario.
1) On disconnect, mtp driver disable its EPs,
2) During send_file_work and receive_file_work, mtp queues a request
   to ep. (The mtp driver need improve its synchronization logic!)
3) mtp_function_unbind is invoked and all mtp requests are freed.
4) when udc process the request queued on step 2, will cause kernel
   NULL pointer dereference exception.

Signed-off-by: Du, Changbin 
Signed-off-by: Felipe Balbi

usb: gadget: udc-core: independent registration of gadgets and gadget drivers

2015-12-16T16:07:27+00:00

Change behavior during registration of gadgets and
gadget drivers in udc-core. Instead of previous
approach when for successful probe of usb gadget driver
at least one usb gadget should be already registered
use another one where gadget drivers and gadgets
can be registered in udc-core independently.

Independent registration of gadgets and gadget drivers
is useful for built-in into kernel gadget and gadget
driver case - because it's possible that gadget is
really probed only on late_init stage (due to deferred
probe) whereas gadget driver's probe is silently failed
on module_init stage due to no any UDC added.

Also it is useful for modules case - now there is no
difference what module to insert first: gadget module
or gadget driver one.

Tested-by: Maxime Ripard 
Signed-off-by: Ruslan Bilovol 
[simplified code as requested by Alan Stern and Felipe Balbi,
 fixed checkpatch issues]
Signed-off-by: Marek Szyprowski 
Tested-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: gadget: udc-core: remove unused usb_udc_attach_driver()

2015-12-16T16:07:26+00:00

Now when last user of usb_udc_attach_driver() is switched
to passing UDC name via usb_gadget_driver struct, it's safe
to remove this function

Tested-by: Maxime Ripard 
Signed-off-by: Ruslan Bilovol 
Signed-off-by: Marek Szyprowski 
Tested-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: gadget: bind UDC by name passed via usb_gadget_driver structure

2015-12-16T16:07:26+00:00

Introduce new 'udc_name' member to usb_gadget_driver structure.
The 'udc_name' is a name of UDC that usb_gadget_driver should
be bound to. If udc_name is NULL, it will be bound to any
available UDC.

Tested-by: Maxime Ripard 
Signed-off-by: Ruslan Bilovol 
Signed-off-by: Marek Szyprowski 
Tested-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: gadget: introduce 'enabled' flag in struct usb_ep

2015-09-27T15:54:31+00:00

This patch introduces 'enabled' flag in struct usb_ep, and modifies
usb_ep_enable() and usb_ep_disable() functions to encapsulate endpoint
enabled/disabled state. It helps to avoid enabling endpoints which are
already enabled, and disabling endpoints which are already disables.

From now USB functions don't have to remember current endpoint
enable/disable state, as this state is now handled automatically which
makes this API less bug-prone.

Signed-off-by: Robert Baldyga 
Signed-off-by: Felipe Balbi

usb: gadget: epautoconf: add usb_ep_autoconfig_release() function

2015-09-27T15:54:31+00:00

This patch introduces usb_ep_autoconfig_release() function which allows
to release endpoint previously obtained from usb_ep_autoconfig() during
USB function bind.

Signed-off-by: Robert Baldyga 
Signed-off-by: Felipe Balbi