diff options
Diffstat (limited to 'payloads/libpayload/drivers/usb/xhci_rh.c')
| -rw-r--r-- | payloads/libpayload/drivers/usb/xhci_rh.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/usb/xhci_rh.c b/payloads/libpayload/drivers/usb/xhci_rh.c index fa118fe460..bcb01ace98 100644 --- a/payloads/libpayload/drivers/usb/xhci_rh.c +++ b/payloads/libpayload/drivers/usb/xhci_rh.c @@ -119,6 +119,24 @@ xhci_rh_reset_port(usbdev_t *const dev, const int port) return 0; } +static int +xhci_rh_enable_port(usbdev_t *const dev, int port) +{ + if (IS_ENABLED(CONFIG_LP_USB_XHCI_MTK_QUIRK)) { + xhci_t *const xhci = XHCI_INST(dev->controller); + volatile u32 *const portsc = + &xhci->opreg->prs[port - 1].portsc; + + /* + * Before sending commands to a port, the Port Power in + * PORTSC register should be enabled on MTK's xHCI. + */ + *portsc = (*portsc & PORTSC_RW_MASK) | PORTSC_PP; + } + return 0; +} + + static const generic_hub_ops_t xhci_rh_ops = { .hub_status_changed = xhci_rh_hub_status_changed, .port_status_changed = xhci_rh_port_status_changed, @@ -126,7 +144,7 @@ static const generic_hub_ops_t xhci_rh_ops = { .port_in_reset = xhci_rh_port_in_reset, .port_enabled = xhci_rh_port_enabled, .port_speed = xhci_rh_port_speed, - .enable_port = NULL, + .enable_port = xhci_rh_enable_port, .disable_port = NULL, .start_port_reset = NULL, .reset_port = xhci_rh_reset_port, |