This patch adds warm reset support to xhci hub control. It handles Set Port Feature(BH_PORT_RESET) and Clear Port Feature (C_BH_PORT_RESET) request from usbcore. Note warm reset is called BH reset some places in USB3.0 specification. Signed-off-by: Andiry Xu <andiry.xu@xxxxxxx> --- drivers/usb/host/xhci-hub.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index a78f2eb..e0c13fa 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -341,6 +341,10 @@ static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, status = PORT_RC; port_change_bit = "reset"; break; + case USB_PORT_FEAT_C_BH_PORT_RESET: + status = PORT_WRC; + port_change_bit = "warm(BH) reset"; + break; case USB_PORT_FEAT_C_CONNECTION: status = PORT_CSC; port_change_bit = "connect"; @@ -557,6 +561,12 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp = xhci_readl(xhci, port_array[wIndex]); xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); break; + case USB_PORT_FEAT_BH_PORT_RESET: + temp |= PORT_WR; + xhci_writel(xhci, temp, port_array[wIndex]); + + temp = xhci_readl(xhci, port_array[wIndex]); + break; default: goto error; } @@ -625,6 +635,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, case USB_PORT_FEAT_C_SUSPEND: bus_state->port_c_suspend &= ~(1 << wIndex); case USB_PORT_FEAT_C_RESET: + case USB_PORT_FEAT_C_BH_PORT_RESET: case USB_PORT_FEAT_C_CONNECTION: case USB_PORT_FEAT_C_OVER_CURRENT: case USB_PORT_FEAT_C_ENABLE: -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
