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libpayload/generic_hub: Detect port disconnect after reset 

If a port disconnects after a reset we should abort any initialization
on the port. This might mean the device has re-enumerated as a 3.0 device
so the hub should be scanned again.

BUG=b:76831439
TEST=Verified USB-C devices that get detected correctly in depthcharge.

Change-Id: Iad899544684312df1bef08d69b5c7f41eac3a21c
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27477
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Raul E Rangel 2018-07-17 13:27:44 -06:00 committed by Martin Roth
parent 5fed693a52
commit 1b43ad7149
1 changed files with 9 additions and 0 deletions
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9
payloads/libpayload/drivers/usb/generic_hub.c
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@ -157,6 +157,15 @@ generic_hub_attach_dev(usbdev_t *const dev, const int port)
if (hub->ops->reset_port) {
if (hub->ops->reset_port(dev, port) < 0)
return -1;
if (!hub->ops->port_connected(dev, port)) {
usb_debug(
"generic_hub: Port %d disconnected after "
"reset. Possibly upgraded, rescan required.\n",
port);
return 0;
}
/* after reset the port will be enabled automatically */
const int ret = generic_hub_wait_for_port(
/* time out after 1,000 * 10us = 10ms */