torvalds/linux
3
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-03-28 02:16:50 +08:00
Code Issues Packages Projects Releases Wiki Activity

usb: raw-gadget: report suspend, resume, reset, and disconnect events

Browse Source 
Update USB_RAW_IOCTL_EVENT_FETCH to also report suspend, resume, reset,
and disconnect events.

This allows the code that emulates a USB device via Raw Gadget to handle
these events. For example, the device can restart enumeration when it
gets reset.

Also do not print a WARNING when the event queue overflows. With these new
events being queued, the queue might overflow if the device emulation code
stops fetching events.

Also print debug messages when a non-control event is received.

Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com>
Link: https://lore.kernel.org/r/d610b629a5f32fb76c24012180743f7f0f1872c0.1698350424.git.andreyknvl@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrey Konovalov
2023-10-26 22:01:14 +02:00
committed by Greg Kroah-Hartman
parent 1f97e3f429
commit c3a383d8d3
2 changed files with 56 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/uapi/linux/usb/raw_gadget.h
View File

@@ -44,6 +44,16 @@ enum usb_raw_event_type {
/* This event is queued when a new control request arrived to ep0. */
USB_RAW_EVENT_CONTROL = 2,
/*
* These events are queued when the gadget driver is suspended,
* resumed, reset, or disconnected. Note that some UDCs (e.g. dwc2)
* report a disconnect event instead of a reset.
*/
USB_RAW_EVENT_SUSPEND = 3,
USB_RAW_EVENT_RESUME = 4,
USB_RAW_EVENT_RESET = 5,
USB_RAW_EVENT_DISCONNECT = 6,
/* The list might grow in the future. */
};
@@ -54,8 +64,8 @@ enum usb_raw_event_type {
* actual length of the fetched event data.
* @data: A buffer to store the fetched event data.
*
* Currently the fetched data buffer is empty for USB_RAW_EVENT_CONNECT,
* and contains struct usb_ctrlrequest for USB_RAW_EVENT_CONTROL.
* The fetched event data buffer contains struct usb_ctrlrequest for
* USB_RAW_EVENT_CONTROL and is empty for other events.
*/
struct usb_raw_event {
__u32 type;