diff options
| -rw-r--r-- | payloads/libpayload/drivers/usb/ehci_rh.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci_rh.c b/payloads/libpayload/drivers/usb/ehci_rh.c index 5c4daeda8a..67f63cc481 100644 --- a/payloads/libpayload/drivers/usb/ehci_rh.c +++ b/payloads/libpayload/drivers/usb/ehci_rh.c @@ -98,8 +98,8 @@ ehci_rh_scanport (usbdev_t *dev, int port) */ RH_INST(dev)->ports[port] = (RH_INST(dev)->ports[port] & ~P_PORT_ENABLE) | P_PORT_RESET; - /* Wait a bit while reset is active. */ - mdelay(50); // usb20 spec 7.1.7.5 (TDRSTR) + /* Wait a bit while reset is active (+1 to avoid Tegra race). */ + mdelay(50 + 1); // usb20 spec 7.1.7.5 (TDRSTR) /* Deassert reset. */ RH_INST(dev)->ports[port] &= ~P_PORT_RESET; @@ -113,6 +113,8 @@ ehci_rh_scanport (usbdev_t *dev, int port) return; } + mdelay(10); /* TRSTRCY (USB 2.0 spec 7.1.7.5) */ + /* If the host controller enabled the port, it's a high-speed * device, otherwise it's full-speed. */ |