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usb: kbd: don't use int xfers when polling via ctrl xfers

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When CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP is enabled, use a
GET_REPORT control transfer to retrieve the initial state of the
keyboard. This matches the technique used to poll the keyboard state.
This is useful since it eliminates the remaining use of interrupt
transfers from the USB keyboard driver, which allows it to work with
USB HCD that don't support interrupt transfers.

Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2015-11-13 13:34:09 -07:00 committed by Marek Vasut
parent fee331f66c
commit e4b70d8035
1 changed files with 3 additions and 0 deletions
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3
common/usb_kbd.c
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@ -476,6 +476,9 @@ static int usb_kbd_probe_dev(struct usb_device *dev, unsigned int ifnum)
USB_KBD_BOOT_REPORT_SIZE, data->new,
data->intinterval);
if (!data->intq) {
#elif defined(CONFIG_SYS_USB_EVENT_POLL_VIA_CONTROL_EP)
if (usb_get_report(dev, iface->desc.bInterfaceNumber,
1, 0, data->new, USB_KBD_BOOT_REPORT_SIZE) < 0) {
#else
if (usb_submit_int_msg(dev, data->intpipe, data->new, data->intpktsize,
data->intinterval) < 0) {