[U-Boot] [PATCH 4/5] usb: ehci: Fix handover of full-speed devices to companion

[Hans de Goede]

When after a reset the port status connection bit is still set and the enable
bit is not then we're dealing with a full-speed device and should hand it over
to the companion controller.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 drivers/usb/host/ehci-hcd.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 0e84265..25981ef 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -897,11 +897,21 @@ static int ehci_submit_root(struct usb_device *dev, unsigned long pipe,
 				 */
 				ret = handshake(status_reg, EHCI_PS_PR, 0,
 						2 * 1000);
-				if (!ret)
-					ctrl->portreset |= 1 << port;
-				else
+				if (!ret) {
+					reg = ehci_readl(status_reg);
+					if ((reg & (EHCI_PS_PE | EHCI_PS_CS))
+					    == EHCI_PS_CS && !ehci_is_TDI()) {
+						debug("port %d full speed --> companion\n", port - 1);
+						reg &= ~EHCI_PS_CLEAR;
+						reg |= EHCI_PS_PO;
+						ehci_writel(status_reg, reg);
+					} else {
+						ctrl->portreset |= 1 << port;
+					}
+				} else {
 					printf("port(%d) reset error\n",
 					       port - 1);
+				}
 			}
 			break;
 		case USB_PORT_FEAT_TEST:
-- 
2.3.6