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libpayload: Adjust timeout in EHCI driver 

Tested with a bunch of usb flash sticks. The slowest non-TUR (test
unit ready) turn around took about 1.3s, so this commit increases the
timeout to 2s.

Change-Id: Iec64b5cc48d51912b2bdeeebb5885399a71311b2
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1120
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Nico Huber 2012-06-01 08:54:29 +02:00
parent dab6bfe97d
commit cef86927e8
1 changed files with 8 additions and 4 deletions
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12
payloads/libpayload/drivers/usb/ehci.c
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@ -169,11 +169,15 @@ static int wait_for_tds(qtd_t *head)
if (0) dump_td(virt_to_phys(cur));
/* wait for results */
/* TOTEST: how long to wait?
* tested with some USB2.0 flash sticks:
* slowest took around 180ms
/* how long to wait?
* tested with some USB2.0 flash sticks:
* TUR turn around took
* about 2s for the slowest (14cd:121c)
* 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
*/
int timeout = 10000; /* time out after 10000 * 50us == 500ms */
int timeout = 40000; /* time out after 40000 * 50us == 2s */
while ((cur->token & QTD_ACTIVE) && !(cur->token & QTD_HALTED)
&& timeout--)
udelay(50);