diff options
| author | Julius Werner <jwerner@chromium.org> | 2013-07-23 12:45:18 -0700 |
|---|---|---|
| committer | Patrick Georgi <patrick@georgi-clan.de> | 2013-12-21 07:39:19 +0100 |
| commit | 52e3f449ac06e1f3e8a40647649fa2f94dea1c0b (patch) | |
| tree | eb35f9dd51f235116a108d037b543eef44bccfab /payloads/libpayload/drivers | |
| parent | 68a8431fcf8ce1fdf390f800b311120f37a5598d (diff) | |
libpayload: Increase USB EHCI transfer timeout
The EHCI driver defines a maximum transfer timeout of two seconds. The
comments state that during tests the maximum amount of required transfer
time was for the SCSI TEST_UNIT_READY command on certain devices. We
have now observed a USB device (Patriot Memory 13fe:3100) that can NAK
this command for slightly more than two seconds. It will also completely
fail if the timeout hits, since it gets confused by the subsequent CSW
retry/recovery mechanism and starts producing babble errors. This patch
increases the timeout to three seconds to circumvent this problem.
To test, boot a Falco from a red-black RageXT USB stick.
Change-Id: I3c4fef468fb16eacc5a487d76d025a78fb450e27
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/63095
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Sameer Nanda <snanda@chromium.org>
Reviewed-on: http://review.coreboot.org/4379
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/usb/ehci.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci.c b/payloads/libpayload/drivers/usb/ehci.c index e61e806345..e58bd38bbb 100644 --- a/payloads/libpayload/drivers/usb/ehci.c +++ b/payloads/libpayload/drivers/usb/ehci.c @@ -279,12 +279,12 @@ static int wait_for_tds(qtd_t *head) /* how long to wait? * tested with some USB2.0 flash sticks: * TUR turn around took - * about 2s for the slowest (14cd:121c) + * about 2.2s for the slowest (13fe:3800) * max. 250ms for the others * slowest non-TUR turn around took about 1.3s - * try 2s for now as a failed TUR is not fatal + * set to 3s to be safe as a failed TUR can be fatal */ - int timeout = 40000; /* time out after 40000 * 50us == 2s */ + int timeout = 60000; /* time out after 60000 * 50us == 3s */ while ((cur->token & QTD_ACTIVE) && !(cur->token & QTD_HALTED) && timeout--) udelay(50); |