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libpayload: EHCI: Fix transaction error for interrupt transfer 

Data toggle should be running like 0, 1, 0, 1, ...
In the failed case (where a low-speed USB keyboard or km232 device
is installed), data toggle will be running as 0, 1, 0, 1, ..., 1, 1.
Therefore causing Halted or Transaction Error bit to be set in qTD
Status field.

BUG=None
BRANCH=None
TEST=Tested on nyan_kitty platform, firmware-kitty-5771.61.B branch.
Attached USB keyboard or km232 device to root-hub port (same side as
SD card slot).
Made sure no transaction error after doing interrupt transfer.

Change-Id: I576f3c583dae4c279a6e0e8ffdfce5abe463277d
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 64b0428aaab869e20f6720669e953acf82ecb846
Original-Change-Id: Ic2c0f95cff2ae6e314967b0b82231a962255f1a7
Original-Signed-off-by: Jim Lin <jilin@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/233857
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/8747
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Jim Lin 2014-12-08 19:30:04 +08:00 committed by Patrick Georgi
parent e63990ef34
commit 16713d7a23
1 changed files with 1 additions and 1 deletions
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2
payloads/libpayload/drivers/usb/ehci.c
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@ -674,7 +674,7 @@ static void *ehci_create_intr_queue(
/* create spare qTD */ /* create spare qTD */
intrq->spare = (intr_qtd_t *)dma_memalign(64, sizeof(intr_qtd_t)); intrq->spare = (intr_qtd_t *)dma_memalign(64, sizeof(intr_qtd_t));
fill_intr_queue_td(intrq, intrq->spare, data); intrq->spare->data = data;
/* initialize QH */ /* initialize QH */
const int endp = ep->endpoint & 0xf; const int endp = ep->endpoint & 0xf;