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usb: workaround non-working keyboards. 

If the USB keyboard is not answering properly the first request on its
interrupt endpoint, just skip it and try the next one.

This workarounds an issue with a wireless mouse dongle which presents
itself both as a keyboard and a mouse but has a non-functional keyboard
interface.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit 012bbf0ce0301be2482857e3f03b481dd15c2340)
Rebased to upstream/master:
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
This commit is contained in:
Vincent Palatin 2013-05-10 19:48:59 -07:00 committed by Marek Vasut
parent 09defbc75b
commit 5da2dc9789
1 changed files with 7 additions and 2 deletions
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9
common/usb_kbd.c
View File

@ -461,8 +461,13 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum)
usb_set_idle(dev, iface->desc.bInterfaceNumber, REPEAT_RATE, 0);
debug("USB KBD: enable interrupt pipe...\n");
usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
ep->bInterval);
if (usb_submit_int_msg(dev, pipe, data->new, maxp > 8 ? 8 : maxp,
ep->bInterval) < 0) {
printf("Failed to get keyboard state from device %04x:%04x\n",
dev->descriptor.idVendor, dev->descriptor.idProduct);
/* Abort, we don't want to use that non-functional keyboard. */
return 0;
}
/* Success. */
return 1;