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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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18
payloads/libpayload/drivers/usb/uhci_rh.c
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@@ -65,10 +65,15 @@ uhci_rh_enable_port (usbdev_t *dev, int port)
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) | 1 << 2); /* enable */
/* wait for controller to enable port */
/* TOTEST: how long to wait? 100ms for now */
int timeout = 200; /* time out after 200 * 500us == 100ms */
do {
value = uhci_reg_read16 (controller, port);
mdelay (1);
} while (((value & (1 << 2)) == 0) && (value & 0x01));
udelay(500); timeout--;
} while (((value & (1 << 2)) == 0) && (value & 0x01) && timeout);
if (!timeout)
debug("Warning: uhci_rh: port enabling timed out.\n");
}
/* disable root hub */
@@ -82,10 +87,15 @@ uhci_rh_disable_port (usbdev_t *dev, int port)
uhci_reg_write16(controller, port,
uhci_reg_read16(controller, port) & ~4);
int value;
/* wait for controller to disable port */
/* TOTEST: how long to wait? 100ms for now */
int timeout = 200; /* time out after 200 * 500us == 100ms */
do {
value = uhci_reg_read16 (controller, port);
mdelay (1);
} while ((value & (1 << 2)) != 0);
udelay(500); timeout--;
} while (((value & (1 << 2)) != 0) && timeout);
if (!timeout)
debug("Warning: uhci_rh: port disabling timed out.\n");
}
static void