[U-Boot] [PATCH 1/3] Fix EHCI port reset.

[Chris Zhang]

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 at seamicro.com>
---
 drivers/usb/host/ehci-hcd.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

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 @@ 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;
-- 
1.5.5