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libpayload: usb: dwc2: check device connect state before enable channel 

If the device has already been disconnected then we shouldn't enable
host channel to start any transfer, otherwise this channel goes into
an odd state the channel is enabled but can not be disabled by set
hcchar.chdis=1. So we need check the device connect status before
enable channel.

BRANCH=None
BUG=chrome-os-partner:44534
TEST=None

Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: ae3e690b2cd4a9ea8b5766ac873b0e00bf3a23de
Original-Change-Id: Ib3ecf486649ca11b302144f9c00a5e88424e90fa
Original-Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/298402
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Lin Huang <hl@rock-chips.com>
Original-Tested-by: Lin Huang <hl@rock-chips.com>
Original-(cherry picked from commit ea96f947b5304fdde2e0991d23febaeba209dde1)
Original-Reviewed-on: https://chromium-review.googlesource.com/299398
Original-Commit-Ready: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: David Hendricks <dhendrix@chromium.org>
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>

Change-Id: Idf48ffbc4c2794900e09dec6b2e34e33b21f87b4
Reviewed-on: http://review.coreboot.org/11662
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Yunzhi Li 2015-09-10 11:42:30 +08:00 committed by Patrick Georgi
parent a881000cd1
commit 87c9f0eaa9
1 changed files with 3 additions and 0 deletions
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3
payloads/libpayload/drivers/usb/dwc2.c
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@ -274,6 +274,9 @@ dwc2_do_xfer(endpoint_t *ep, int size, int pid, ep_dir_t dir,
if (do_copy && (dir == EPDIR_OUT))
memcpy(aligned_buf, data_buf, size);
if (dwc2_disconnected(ep->dev->controller))
return -HCSTAT_DISCONNECTED;
writel(hctsiz.d32, &reg->host.hchn[ch_num].hctsizn);
writel((uint32_t)virt_to_bus(aligned_buf),
&reg->host.hchn[ch_num].hcdman);