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libpayload: udc/dwc2: Ignore setup packet in check for queue empty 

during shutdown

DWC2 UDC controller always requires an active packet to be present in
EP0-OUT to ensure proper operation of control plane. Thus, during
shutdown ignore EP0-OUT for queue empty check if only 1 packet is
present.

BUG=b:24676003
BRANCH=None
TEST=Compiles successfully. "fastboot reboot-bootloader" reboots
device without timeout in udc shutdown.

Change-Id: Iafe46c80f58c4cd57f8d58f060d805b603506bbd
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4e7c27d849c0411aae58e60a24d8170a27ab8485
Original-Change-Id: Ifa493ce0e41964ee7ca8bb3a1f4bb8726fa11173
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/311257
Original-Commit-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/12413
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
This commit is contained in:
Furquan Shaikh 2015-11-06 22:22:56 -08:00 committed by Patrick Georgi
parent 1dcb10eeb6
commit fe35623f20
1 changed files with 13 additions and 1 deletions
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14
payloads/libpayload/drivers/udc/dwc2.c
View File

@ -704,9 +704,21 @@ static void dwc2_shutdown(struct usbdev_ctrl *this)
is_empty = 1;
this->poll(this);
for (i = 0; i < 16; i++)
for (j = 0; j < 2; j++)
for (j = 0; j < 2; j++) {
/*
* EP0-OUT needs to always have an active packet
* for proper operation of control packet
* flow. Thus, ignore if only 1 packet is
* present in EP0-OUT.
*/
if ((i == 0) && (j == 0) &&
SIMPLEQ_SINGLETON(&p->eps[0][0].job_queue,
queue))
continue;
if (!SIMPLEQ_EMPTY(&p->eps[i][j].job_queue))
is_empty = 0;
}
}
if (timer_us(shutdown_timer_us) >= shutdown_timeout_us)