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libpayload: Add timeouts in the UHCI USB driver

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We should always have some timeout when we wait for the hardware. This adds
missing timeouts to the UHCI driver.

Change-Id: Ic37b95ce12ff3ff5efe3e7ca346090946f6ee7de
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1073
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
This commit is contained in:
Nico Huber
2012-05-21 14:23:03 +02:00
committed by Patrick Georgi
parent c43e736c0c
commit bb1c42b920
2 changed files with 24 additions and 9 deletions
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15
payloads/libpayload/drivers/usb/uhci.c
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@@ -102,13 +102,18 @@ static void
uhci_reset (hci_t *controller)
{
/* reset */
uhci_reg_write16 (controller, USBCMD, 4);
mdelay (50);
uhci_reg_write16 (controller, USBCMD, 4); /* Global Reset */
mdelay (50); /* uhci spec 2.1.1: at least 10ms */
uhci_reg_write16 (controller, USBCMD, 0);
mdelay (10);
uhci_reg_write16 (controller, USBCMD, 2);
while ((uhci_reg_read16 (controller, USBCMD) & 2) != 0)
mdelay (1);
uhci_reg_write16 (controller, USBCMD, 2); /* Host Controller Reset */
/* wait for controller to finish reset */
/* TOTEST: how long to wait? 100ms for now */
int timeout = 200; /* time out after 200 * 500us == 100ms */
while (((uhci_reg_read16 (controller, USBCMD) & 2) != 0) && timeout--)
udelay (500);
if (timeout < 0)
debug ("Warning: uhci: host controller reset timed out.\n");
uhci_reg_write32 (controller, FLBASEADD,
(u32) virt_to_phys (UHCI_INST (controller)->