From e4b70d80350c1238fa07872d71c19e3ddbf53b76 Mon Sep 17 00:00:00 2001
From: Stephen Warren <swarren@nvidia.com>
Date: Fri, 13 Nov 2015 13:34:09 -0700
Subject: [PATCH] usb: kbd: don't use int xfers when polling via ctrl xfers
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>
---
common/usb_kbd.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 069fbd2de7..9617a4848a 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -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) {
--
2.39.5