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libpayload: xhci: Carry over fixes from Chromium tree 

This patch re-adds a few fixes that originally went into the
chromeos-2013.04 tree. I kinda seem to have slipped them into the
backport of Nico's original XHCI patch (crosreview.com/168097) instead
of making a new change, which was not very clever and caused them to be
forgotten in the later upstreaming wave.

Changing internal XHCI error numbers is just a cosmetic change to make
them uniquely identifyable in debug output. Bumping the timeout to 3
seconds is an actually important fix since we have seen mass storage
devices needing that much in the past.

BRANCH=None
BUG=None
TEST=Diffed payloads/libpayload/drivers/usb between chromeos-2013.04 and
chromeos-2015.07, confirmed that no serious differences remain.

Original-Change-Id: I03d865dbe536072d23374a49a0136e9f28568f8e
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/290423
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>

Change-Id: I5d773d3a23683fb2164916cc046f4a711b8d259e
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/11178
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Julius Werner 2015-08-03 14:21:07 -07:00 committed by Aaron Durbin
parent 03e8188a3f
commit 5f9a3f7fae
2 changed files with 13 additions and 12 deletions
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14
payloads/libpayload/drivers/usb/xhci_events.c
View File

@ -311,15 +311,15 @@ int
xhci_wait_for_transfer(xhci_t *const xhci, const int slot_id, const int ep_id)
{
xhci_spew("Waiting for transfer on ID %d EP %d\n", slot_id, ep_id);
/* 2s for all types of transfers */ /* TODO: test, wait longer? */
unsigned long timeout_us = 2 * 1000 * 1000;
int cc = TIMEOUT;
/* 3s for all types of transfers */ /* TODO: test, wait longer? */
unsigned long timeout_us = 3 * 1000 * 1000;
int ret = TIMEOUT;
while (xhci_wait_for_event_type(xhci, TRB_EV_TRANSFER, &timeout_us)) {
if (TRB_GET(ID, xhci->er.cur) == slot_id &&
TRB_GET(EP, xhci->er.cur) == ep_id) {
cc = -TRB_GET(CC, xhci->er.cur);
if (cc == -CC_SUCCESS || cc == -CC_SHORT_PACKET)
cc = TRB_GET(EVTL, xhci->er.cur);
ret = -TRB_GET(CC, xhci->er.cur);
if (ret == -CC_SUCCESS || ret == -CC_SHORT_PACKET)
ret = TRB_GET(EVTL, xhci->er.cur);
xhci_advance_event_ring(xhci);
break;
}
@ -329,5 +329,5 @@ xhci_wait_for_transfer(xhci_t *const xhci, const int slot_id, const int ep_id)
if (!timeout_us)
xhci_debug("Warning: Timed out waiting for TRB_EV_TRANSFER.\n");
xhci_update_event_dq(xhci);
return cc;
return ret;
}

11
payloads/libpayload/drivers/usb/xhci_private.h
View File

@ -46,11 +46,12 @@
#define MASK(startbit, lenbit) (((1<<(lenbit))-1)<<(startbit))
#define TIMEOUT -1
#define CONTROLLER_ERROR -2
#define COMMUNICATION_ERROR -3
#define OUT_OF_MEMORY -4
#define DRIVER_ERROR -5
/* Make these high enough to not collide with negative XHCI CCs */
#define TIMEOUT -65
#define CONTROLLER_ERROR -66
#define COMMUNICATION_ERROR -67
#define OUT_OF_MEMORY -68
#define DRIVER_ERROR -69
#define CC_SUCCESS 1
#define CC_TRB_ERROR 5