Fix EHCI port reset.
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>
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index ba85991..9ebeb4f 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -708,6 +708,9 @@
* 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;