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Commit a11496eb authored by Andiry Xu's avatar Andiry Xu Committed by Sarah Sharp
Browse files

xHCI: warm reset support 



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: default avatarAndiry Xu <andiry.xu@amd.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
parent 64b3c304

drivers/usb/host/xhci-hub.c

+11 −0
Original line number Diff line number Diff line
@@ -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: