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Fix EHCI port reset.

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In USB ehci driver, the port reset is not terminated. EHCI spec says "A host
 controller must terminate the reset and stabilize the state of the port within
 2 milliseconds". Without termination, a port stays at reset state. This is
 observed on ppc4xx(sequoia) boards.

Signed-off-by: Chris Zhang <chris@seamicro.com>
This commit is contained in:
Chris Zhang 2010-01-06 13:34:04 -08:00 committed by Remy Bohmer
parent b301be0599
commit b416191a14
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/host/ehci-hcd.c
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@ -708,6 +708,9 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
* root
*/
wait_ms(50);
/* terminate the reset */
ehci_writel(status_reg, reg & ~EHCI_PS_PR);
wait_ms(2);
portreset |= 1 << le16_to_cpu(req->index);
}
break;