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usb: raw-gadget: support stalling/halting/wedging endpoints

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Raw Gadget is currently unable to stall/halt/wedge gadget endpoints,
which is required for proper emulation of certain USB classes.

This patch adds a few more ioctls:

- USB_RAW_IOCTL_EP0_STALL allows to stall control endpoint #0 when
  there's a pending setup request for it.
- USB_RAW_IOCTL_SET/CLEAR_HALT/WEDGE allow to set/clear halt/wedge status
  on non-control non-isochronous endpoints.

Fixes: f2c2e71764 ("usb: gadget: add raw-gadget interface")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Andrey Konovalov
2020-05-07 19:06:57 +02:00
committed by Felipe Balbi
parent 97df5e5758
commit c61769bd47
3 changed files with 144 additions and 4 deletions
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2
Documentation/usb/raw-gadget.rst
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@@ -52,8 +52,6 @@ The typical usage of Raw Gadget looks like:
Potential future improvements
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Implement ioctl's for setting/clearing halt status on endpoints.
- Reporting more events (suspend, resume, etc.) through
USB_RAW_IOCTL_EVENT_FETCH.