Пример #1
0
int xhci_bus_suspend(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);

	if (hcd->self.root_hub->do_remote_wakeup) {
		port_index = max_ports;
		while (port_index--) {
			if (bus_state->resume_done[port_index] != 0) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_dbg(xhci, "suspend failed because "
						"port %d is resuming\n",
						port_index + 1);
				return -EBUSY;
			}
		}
	}

	port_index = max_ports;
	bus_state->bus_suspended = 0;
	while (port_index--) {
		/* suspend the port if the port is not suspended */
		u32 t1, t2;
		int slot_id;

		t1 = xhci_readl(xhci, port_array[port_index]);
		t2 = xhci_port_state_to_neutral(t1);

		if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
			xhci_dbg(xhci, "port %d not suspended\n", port_index);
			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					port_index + 1);
			if (slot_id) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_stop_device(xhci, slot_id, 1);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			t2 &= ~PORT_PLS_MASK;
			t2 |= PORT_LINK_STROBE | XDEV_U3;
			set_bit(port_index, &bus_state->bus_suspended);
		}
		/* USB core sets remote wake mask for USB 3.0 hubs,
		 * including the USB 3.0 roothub, but only if CONFIG_USB_SUSPEND
		 * is enabled, so also enable remote wake here.
		 */
		if (hcd->self.root_hub->do_remote_wakeup) {
			if (t1 & PORT_CONNECT) {
				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
				t2 &= ~PORT_WKCONN_E;
			} else {
				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
				t2 &= ~PORT_WKDISC_E;
			}
		} else
			t2 &= ~PORT_WAKE_BITS;

		t1 = xhci_port_state_to_neutral(t1);
		if (t1 != t2) {
			xhci_writel(xhci, t2, port_array[port_index]);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);
		}
	}
	hcd->state = HC_STATE_SUSPENDED;
	bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}
Пример #2
0
int xhci_bus_suspend(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);

	if (hcd->self.root_hub->do_remote_wakeup) {
		port_index = max_ports;
		while (port_index--) {
			if (bus_state->resume_done[port_index] != 0) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_dbg(xhci, "suspend failed because "
						"port %d is resuming\n",
						port_index + 1);
				return -EBUSY;
			}
		}
	}

	port_index = max_ports;
	bus_state->bus_suspended = 0;
	while (port_index--) {
		/* suspend the port if the port is not suspended */
		u32 t1, t2;
		int slot_id;

		t1 = xhci_readl(xhci, port_array[port_index]);
		t2 = xhci_port_state_to_neutral(t1);

		if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
			xhci_dbg(xhci, "port %d not suspended\n", port_index);
			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					port_index + 1);
			if (slot_id) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_stop_device(xhci, slot_id, 1);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			t2 &= ~PORT_PLS_MASK;
			t2 |= PORT_LINK_STROBE | XDEV_U3;
			set_bit(port_index, &bus_state->bus_suspended);
		}
		if (hcd->self.root_hub->do_remote_wakeup) {
			if (t1 & PORT_CONNECT) {
				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
				t2 &= ~PORT_WKCONN_E;
			} else {
				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
				t2 &= ~PORT_WKDISC_E;
			}
		} else
			t2 &= ~PORT_WAKE_BITS;

		t1 = xhci_port_state_to_neutral(t1);
		if (t1 != t2)
			xhci_writel(xhci, t2, port_array[port_index]);

		if (hcd->speed != HCD_USB3) {
			/* enable remote wake up for USB 2.0 */
			__le32 __iomem *addr;
			u32 tmp;

			/* Add one to the port status register address to get
			 * the port power control register address.
			 */
			addr = port_array[port_index] + 1;
			tmp = xhci_readl(xhci, addr);
			tmp |= PORT_RWE;
			xhci_writel(xhci, tmp, addr);
		}
	}
	hcd->state = HC_STATE_SUSPENDED;
	bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}
Пример #3
0
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports;
	unsigned long flags;
	u32 temp, status;
	int retval = 0;
	__le32 __iomem **port_array;
	int slot_id;
	struct xhci_bus_state *bus_state;
	u16 link_state = 0;
	u16 wake_mask = 0;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		/* Check to make sure userspace is asking for the USB 3.0 hub
		 * descriptor for the USB 3.0 roothub.  If not, we stall the
		 * endpoint, like external hubs do.
		 */
		if (hcd->speed == HCD_USB3 &&
				(wLength < USB_DT_SS_HUB_SIZE ||
				 wValue != (USB_DT_SS_HUB << 8))) {
			xhci_dbg(xhci, "Wrong hub descriptor type for "
					"USB 3.0 roothub.\n");
			goto error;
		}
		xhci_hub_descriptor(hcd, xhci,
				(struct usb_hub_descriptor *) buf);
		break;
	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
		if ((wValue & 0xff00) != (USB_DT_BOS << 8))
			goto error;

		if (hcd->speed != HCD_USB3)
			goto error;

		memcpy(buf, &usb_bos_descriptor,
				USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
		temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
		buf[12] = HCS_U1_LATENCY(temp);
		put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);

		spin_unlock_irqrestore(&xhci->lock, flags);
		return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
	case GetPortStatus:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		status = 0;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* wPortChange bits */
		if (temp & PORT_CSC)
			status |= USB_PORT_STAT_C_CONNECTION << 16;
		if (temp & PORT_PEC)
			status |= USB_PORT_STAT_C_ENABLE << 16;
		if ((temp & PORT_OCC))
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
		if ((temp & PORT_RC))
			status |= USB_PORT_STAT_C_RESET << 16;
		/* USB3.0 only */
		if (hcd->speed == HCD_USB3) {
			if ((temp & PORT_PLC))
				status |= USB_PORT_STAT_C_LINK_STATE << 16;
			if ((temp & PORT_WRC))
				status |= USB_PORT_STAT_C_BH_RESET << 16;
		}

		if (hcd->speed != HCD_USB3) {
			if ((temp & PORT_PLS_MASK) == XDEV_U3
					&& (temp & PORT_POWER))
				status |= USB_PORT_STAT_SUSPEND;
		}
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME &&
				!DEV_SUPERSPEED(temp)) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (time_after_eq(jiffies,
					bus_state->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				bus_state->resume_done[wIndex] = 0;
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
								 wIndex + 1);
				if (!slot_id) {
					xhci_dbg(xhci, "slot_id is zero\n");
					goto error;
				}
				xhci_ring_device(xhci, slot_id);
				bus_state->port_c_suspend |= 1 << wIndex;
				bus_state->suspended_ports &= ~(1 << wIndex);
			} else {
				/*
				 * The resume has been signaling for less than
				 * 20ms. Report the port status as SUSPEND,
				 * let the usbcore check port status again
				 * and clear resume signaling later.
				 */
				status |= USB_PORT_STAT_SUSPEND;
			}
		}
		if ((temp & PORT_PLS_MASK) == XDEV_U0
			&& (temp & PORT_POWER)
			&& (bus_state->suspended_ports & (1 << wIndex))) {
			bus_state->suspended_ports &= ~(1 << wIndex);
			if (hcd->speed != HCD_USB3)
				bus_state->port_c_suspend |= 1 << wIndex;
		}
		if (temp & PORT_CONNECT) {
			status |= USB_PORT_STAT_CONNECTION;
			status |= xhci_port_speed(temp);
		}
		if (temp & PORT_PE)
			status |= USB_PORT_STAT_ENABLE;
		if (temp & PORT_OC)
			status |= USB_PORT_STAT_OVERCURRENT;
		if (temp & PORT_RESET)
			status |= USB_PORT_STAT_RESET;
		if (temp & PORT_POWER) {
			if (hcd->speed == HCD_USB3)
				status |= USB_SS_PORT_STAT_POWER;
			else
				status |= USB_PORT_STAT_POWER;
		}
		/* Port Link State */
		if (hcd->speed == HCD_USB3) {
			/* resume state is a xHCI internal state.
			 * Do not report it to usb core.
			 */
			if ((temp & PORT_PLS_MASK) != XDEV_RESUME)
				status |= (temp & PORT_PLS_MASK);
		}
		if (bus_state->port_c_suspend & (1 << wIndex))
			status |= 1 << USB_PORT_FEAT_C_SUSPEND;
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
		break;
	case SetPortFeature:
		if (wValue == USB_PORT_FEAT_LINK_STATE)
			link_state = (wIndex & 0xff00) >> 3;
		if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
			wake_mask = wIndex & 0xff00;
		wIndex &= 0xff;
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		temp = xhci_port_state_to_neutral(temp);
		/* FIXME: What new port features do we need to support? */
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PLS_MASK) != XDEV_U0) {
				/* Resume the port to U0 first */
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(10);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			/* In spec software should not attempt to suspend
			 * a port unless the port reports that it is in the
			 * enabled (PED = ‘1’,PLS < ‘3’) state.
			 */
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
				xhci_warn(xhci, "USB core suspending device "
					  "not in U0/U1/U2.\n");
				goto error;
			}

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_warn(xhci, "slot_id is zero\n");
				goto error;
			}
			/* unlock to execute stop endpoint commands */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_stop_device(xhci, slot_id, 1);
			spin_lock_irqsave(&xhci->lock, flags);

			xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(10); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_LINK_STATE:
			temp = xhci_readl(xhci, port_array[wIndex]);
			/* Software should not attempt to set
			 * port link state above '5' (Rx.Detect) and the port
			 * must be enabled.
			 */
			if ((temp & PORT_PE) == 0 ||
				(link_state > USB_SS_PORT_LS_RX_DETECT)) {
				xhci_warn(xhci, "Cannot set link state.\n");
				goto error;
			}

			if (link_state == USB_SS_PORT_LS_U3) {
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
						wIndex + 1);
				if (slot_id) {
					/* unlock to execute stop endpoint
					 * commands */
					spin_unlock_irqrestore(&xhci->lock,
								flags);
					xhci_stop_device(xhci, slot_id, 1);
					spin_lock_irqsave(&xhci->lock, flags);
				}
			}

			xhci_set_link_state(xhci, port_array, wIndex,
						link_state);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(20); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			if (link_state == USB_SS_PORT_LS_U3)
				bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_POWER:
			/*
			 * Turn on ports, even if there isn't per-port switching.
			 * HC will report connect events even before this is set.
			 * However, khubd will ignore the roothub events until
			 * the roothub is registered.
			 */
			xhci_writel(xhci, temp | PORT_POWER,
					port_array[wIndex]);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		case USB_PORT_FEAT_RESET:
			temp = (temp | PORT_RESET);
			xhci_writel(xhci, temp, port_array[wIndex]);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);

			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_REMOTE_WAKE_MASK:
			xhci_set_remote_wake_mask(xhci, port_array,
					wIndex, wake_mask);
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port remote wake mask, "
					"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]);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);

			temp = xhci_readl(xhci, port_array[wIndex]);
			break;
		default:
			goto error;
		}
		/* unblock any posted writes */
		temp = xhci_readl(xhci, port_array[wIndex]);
		break;
	case ClearPortFeature:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		/* FIXME: What new port features do we need to support? */
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
			xhci_dbg(xhci, "PORTSC %04x\n", temp);
			if (temp & PORT_RESET)
				goto error;
			if ((temp & PORT_PLS_MASK) == XDEV_U3) {
				if ((temp & PORT_PE) == 0)
					goto error;

				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_RESUME);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
			}
			bus_state->port_c_suspend |= 1 << wIndex;

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_dbg(xhci, "slot_id is zero\n");
				goto error;
			}
			xhci_ring_device(xhci, slot_id);
			break;
		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:
		case USB_PORT_FEAT_C_PORT_LINK_STATE:
			xhci_clear_port_change_bit(xhci, wValue, wIndex,
					port_array[wIndex], temp);
			break;
		case USB_PORT_FEAT_ENABLE:
			xhci_disable_port(hcd, xhci, wIndex,
					port_array[wIndex], temp);
			break;
		default:
			goto error;
		}
		break;
	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return retval;
}
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports;
	unsigned long flags;
	u32 temp, status;
	int retval = 0;
	__le32 __iomem **port_array;
	int slot_id;
	struct xhci_bus_state *bus_state;
	u16 link_state = 0;
	u16 wake_mask = 0;
	u32 __iomem *status_reg = NULL;
	u32 i, command, num_ports, selector;


	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];


	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		/* Check to make sure userspace is asking for the USB 3.0 hub
		 * descriptor for the USB 3.0 roothub.  If not, we stall the
		 * endpoint, like external hubs do.
		 */
		if (hcd->speed == HCD_USB3 &&
				(wLength < USB_DT_SS_HUB_SIZE ||
				 wValue != (USB_DT_SS_HUB << 8))) {
			xhci_dbg(xhci, "Wrong hub descriptor type for "
					"USB 3.0 roothub.\n");
			goto error;
		}
		xhci_hub_descriptor(hcd, xhci,
				(struct usb_hub_descriptor *) buf);
		break;
	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
		if ((wValue & 0xff00) != (USB_DT_BOS << 8))
			goto error;

		if (hcd->speed != HCD_USB3)
			goto error;

		memcpy(buf, &usb_bos_descriptor,
				USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
		temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
		buf[12] = HCS_U1_LATENCY(temp);
		put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);

		spin_unlock_irqrestore(&xhci->lock, flags);
		return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
	case GetPortStatus:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		status = 0;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* wPortChange bits */
		if (temp & PORT_CSC)
			status |= USB_PORT_STAT_C_CONNECTION << 16;
		if (temp & PORT_PEC)
			status |= USB_PORT_STAT_C_ENABLE << 16;
		if ((temp & PORT_OCC))
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
		if ((temp & PORT_RC))
			status |= USB_PORT_STAT_C_RESET << 16;
		/* USB3.0 only */
		if (hcd->speed == HCD_USB3) {
			if ((temp & PORT_PLC))
				status |= USB_PORT_STAT_C_LINK_STATE << 16;
			if ((temp & PORT_WRC))
				status |= USB_PORT_STAT_C_BH_RESET << 16;
		}

		if (hcd->speed != HCD_USB3) {
			if ((temp & PORT_PLS_MASK) == XDEV_U3
					&& (temp & PORT_POWER))
				status |= USB_PORT_STAT_SUSPEND;
		}
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME &&
				!DEV_SUPERSPEED(temp)) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (time_after_eq(jiffies,
					bus_state->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				bus_state->resume_done[wIndex] = 0;
				clear_bit(wIndex, &bus_state->resuming_ports);
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
								 wIndex + 1);
				if (!slot_id) {
					xhci_dbg(xhci, "slot_id is zero\n");
					goto error;
				}
				xhci_ring_device(xhci, slot_id);
				bus_state->port_c_suspend |= 1 << wIndex;
				bus_state->suspended_ports &= ~(1 << wIndex);
			} else {
				/*
				 * The resume has been signaling for less than
				 * 20ms. Report the port status as SUSPEND,
				 * let the usbcore check port status again
				 * and clear resume signaling later.
				 */
				status |= USB_PORT_STAT_SUSPEND;
			}
		}
		if ((temp & PORT_PLS_MASK) == XDEV_U0
			&& (temp & PORT_POWER)
			&& (bus_state->suspended_ports & (1 << wIndex))) {
			bus_state->suspended_ports &= ~(1 << wIndex);
			if (hcd->speed != HCD_USB3)
				bus_state->port_c_suspend |= 1 << wIndex;
		}
		if (temp & PORT_CONNECT) {
			status |= USB_PORT_STAT_CONNECTION;
			status |= xhci_port_speed(temp);
		}
		if (temp & PORT_PE)
			status |= USB_PORT_STAT_ENABLE;
		if (temp & PORT_OC)
			status |= USB_PORT_STAT_OVERCURRENT;
		if (temp & PORT_RESET)
			status |= USB_PORT_STAT_RESET;
		if (temp & PORT_POWER) {
			if (hcd->speed == HCD_USB3)
				status |= USB_SS_PORT_STAT_POWER;
			else
				status |= USB_PORT_STAT_POWER;
		}
		/* Update Port Link State for super speed ports*/
		if (hcd->speed == HCD_USB3) {
			xhci_hub_report_link_state(&status, temp);
			/*
			 * Verify if all USB3 Ports Have entered U0 already.
			 * Delete Compliance Mode Timer if so.
			 */
			xhci_del_comp_mod_timer(xhci, temp, wIndex);
		}
		if (bus_state->port_c_suspend & (1 << wIndex))
			status |= 1 << USB_PORT_FEAT_C_SUSPEND;
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
		break;
	case SetPortFeature:
		if (wValue == USB_PORT_FEAT_LINK_STATE)
			link_state = (wIndex & 0xff00) >> 3;
		if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
			wake_mask = wIndex & 0xff00;
		selector = wIndex >> 8;
		wIndex &= 0xff;
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		status_reg = &xhci->op_regs->port_power_base +
			NUM_PORT_REGS*wIndex;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		temp = xhci_port_state_to_neutral(temp);
		/* FIXME: What new port features do we need to support? */
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PLS_MASK) != XDEV_U0) {
				/* Resume the port to U0 first */
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(10);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			/* In spec software should not attempt to suspend
			 * a port unless the port reports that it is in the
			 * enabled (PED = ‘1’,PLS < ‘3’) state.
			 */
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
				xhci_warn(xhci, "USB core suspending device "
					  "not in U0/U1/U2.\n");
				goto error;
			}

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_warn(xhci, "slot_id is zero\n");
				goto error;
			}
			/* unlock to execute stop endpoint commands */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_stop_device(xhci, slot_id, 1);
			spin_lock_irqsave(&xhci->lock, flags);

			xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(10); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_LINK_STATE:
			temp = xhci_readl(xhci, port_array[wIndex]);

			/* Disable port */
			if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
				xhci_dbg(xhci, "Disable port %d\n", wIndex);
				temp = xhci_port_state_to_neutral(temp);
				/*
				 * Clear all change bits, so that we get a new
				 * connection event.
				 */
				temp |= PORT_CSC | PORT_PEC | PORT_WRC |
					PORT_OCC | PORT_RC | PORT_PLC |
					PORT_CEC;
				xhci_writel(xhci, temp | PORT_PE,
					port_array[wIndex]);
				temp = xhci_readl(xhci, port_array[wIndex]);
				break;
			}

			/* Put link in RxDetect (enable port) */
			if (link_state == USB_SS_PORT_LS_RX_DETECT) {
				xhci_dbg(xhci, "Enable port %d\n", wIndex);
				xhci_set_link_state(xhci, port_array, wIndex,
						link_state);
				temp = xhci_readl(xhci, port_array[wIndex]);
				break;
			}

			/* Software should not attempt to set
			 * port link state above '3' (U3) and the port
			 * must be enabled.
			 */
			if ((temp & PORT_PE) == 0 ||
				(link_state > USB_SS_PORT_LS_U3)) {
				xhci_warn(xhci, "Cannot set link state.\n");
				goto error;
			}

			if (link_state == USB_SS_PORT_LS_U3) {
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
						wIndex + 1);
				if (slot_id) {
					/* unlock to execute stop endpoint
					 * commands */
					spin_unlock_irqrestore(&xhci->lock,
								flags);
					xhci_stop_device(xhci, slot_id, 1);
					spin_lock_irqsave(&xhci->lock, flags);
				}
			}

			xhci_set_link_state(xhci, port_array, wIndex,
						link_state);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(20); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			if (link_state == USB_SS_PORT_LS_U3)
				bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_POWER:
			/* FIXME Do not turn on BYT XHCI port 6 power,
			 * Disable this port's power to disable HSIC hub
			 */
			 if ((xhci->quirks & XHCI_PORT_DISABLE_QUIRK) &&
				(wIndex == 5)) {
				temp = xhci_readl(xhci, port_array[wIndex]);
				temp &= ~PORT_POWER;
				xhci_writel(xhci, temp, port_array[wIndex]);
				break;
			}
			/*
			 * Turn on ports, even if there isn't per-port switching.
			 * HC will report connect events even before this is set.
			 * However, khubd will ignore the roothub events until
			 * the roothub is registered.
			 */
			xhci_writel(xhci, temp | PORT_POWER,
					port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		case USB_PORT_FEAT_RESET:
			temp = (temp | PORT_RESET);
			xhci_writel(xhci, temp, port_array[wIndex]);

			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_REMOTE_WAKE_MASK:
			xhci_set_remote_wake_mask(xhci, port_array,
					wIndex, wake_mask);
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port remote wake mask, "
					"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;
		case USB_PORT_FEAT_TEST:
			if (!selector || selector >= 5 || !status_reg)
				goto error;
			/*
			 * Disable all Device Slots.
			 */
			for (i = 0; i < MAX_HC_SLOTS; i++) {
				if (xhci->dcbaa->dev_context_ptrs[i]) {
					if (xhci_queue_slot_control(xhci,
						TRB_DISABLE_SLOT, i)) {
						xhci_err(xhci,
						"Disable slot[%d] failed!\n",
						i);
						goto error;
					}
				xhci_dbg(xhci, "Disable Slot[%d].\n", i);
				}
			}
			/*
			 *	All ports shall be in the Disable state (PP = 0)
			 */
			xhci_dbg(xhci, "Disable all port (PP = 0)\n");
			num_ports = HCS_MAX_PORTS(xhci->hcs_params1);
			for (i = 0; i < num_ports; i++) {
				u32 __iomem *sreg =
					&xhci->op_regs->port_status_base +
						NUM_PORT_REGS*i;
				temp = xhci_readl(xhci, sreg);
				temp &= ~PORT_POWER;
				xhci_writel(xhci, temp, sreg);
			}

			/*	Set the Run/Stop (R/S) bit in the USBCMD
			 *	register to a '0' and wait for HCHalted(HCH) bit
			 *	in the USBSTS register, to transition to a '1'.
			 */
			xhci_dbg(xhci, "Stop controller\n");
			command = xhci_readl(xhci, &xhci->op_regs->command);
			command &= ~CMD_RUN;
			xhci_writel(xhci, command, &xhci->op_regs->command);
			if (handshake(xhci, &xhci->op_regs->status,
						STS_HALT, STS_HALT, 100*100)) {
				xhci_warn(xhci, "WARN: xHC CMD_RUN timeout\n");
				return -ETIMEDOUT;
			}

			/*
			 * start to test
			 */
			xhci_dbg(xhci, "test case:");
			switch (selector) {
			case 1:
				xhci_dbg(xhci, "TEST_J\n");
				break;
			case 2:
				xhci_dbg(xhci, "TEST_K\n");
				break;
			case 3:
				xhci_dbg(xhci, "TEST_SE0_NAK\n");
				break;
			case 4:
				xhci_dbg(xhci, "TEST_PACKET\n");
				break;
			default:
				xhci_dbg(xhci, "Invalide test case!\n");
				goto error;
			}
			temp = xhci_readl(xhci, status_reg);
			temp |= selector << 28;
			xhci_writel(xhci, temp, status_reg);
			break;
		default:
			goto error;
		}
		/* unblock any posted writes */
		temp = xhci_readl(xhci, port_array[wIndex]);
		break;
	case ClearPortFeature:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		/* FIXME: What new port features do we need to support? */
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
			xhci_dbg(xhci, "PORTSC %04x\n", temp);
			if (temp & PORT_RESET)
				goto error;
			if ((temp & PORT_PLS_MASK) == XDEV_U3) {
				if ((temp & PORT_PE) == 0)
					goto error;

				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_RESUME);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
			}
			bus_state->port_c_suspend |= 1 << wIndex;

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_dbg(xhci, "slot_id is zero\n");
				goto error;
			}
			xhci_ring_device(xhci, slot_id);
			break;
		case USB_PORT_FEAT_POWER:
			/*
			 * Turn off ports even if there isn't per-port
			 * swithing. HC will report connect events even
			 * before this is set. However, khubd will ignore
			 * the roothub events until the roothub is registered.
			 */
			xhci_writel(xhci, temp & ~PORT_POWER,
					port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "clear PP, port %d status  = 0x%x\n",
					wIndex, temp);
			break;
		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:
		case USB_PORT_FEAT_C_PORT_LINK_STATE:
			xhci_clear_port_change_bit(xhci, wValue, wIndex,
					port_array[wIndex], temp);
			break;
		case USB_PORT_FEAT_ENABLE:
			xhci_disable_port(hcd, xhci, wIndex,
					port_array[wIndex], temp);
			break;
		default:
			goto error;
		}
		break;
	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return retval;
}
Пример #5
0
int xhci_bus_suspend(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);

	if (hcd->self.root_hub->do_remote_wakeup) {
		if (bus_state->resuming_ports) {
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_dbg(xhci, "suspend failed because "
						"a port is resuming\n");
			return -EBUSY;
		}
	}

	port_index = max_ports;
	bus_state->bus_suspended = 0;
	while (port_index--) {
		/* suspend the port if the port is not suspended */
		u32 t1, t2;
		int slot_id;

		t1 = xhci_readl(xhci, port_array[port_index]);
		t2 = xhci_port_state_to_neutral(t1);

		if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
			xhci_dbg(xhci, "port %d not suspended\n", port_index);
			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					port_index + 1);
			if (slot_id) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_stop_device(xhci, slot_id, 1);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			t2 &= ~PORT_PLS_MASK;
			t2 |= PORT_LINK_STROBE | XDEV_U3;
			set_bit(port_index, &bus_state->bus_suspended);
		}
		/* USB core sets remote wake mask for USB 3.0 hubs,
		 * including the USB 3.0 roothub, but only if CONFIG_USB_SUSPEND
		 * is enabled, so also enable remote wake here.
		 */
		if (hcd->self.root_hub->do_remote_wakeup) {
			if (t1 & PORT_CONNECT) {
				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
				t2 &= ~PORT_WKCONN_E;
			} else {
				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
				t2 &= ~PORT_WKDISC_E;
			}
		} else
			t2 &= ~PORT_WAKE_BITS;

		t1 = xhci_port_state_to_neutral(t1);
		if (t1 != t2) {
			xhci_writel(xhci, t2, port_array[port_index]);
	}
	hcd->state = HC_STATE_SUSPENDED;
	bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}

int xhci_bus_resume(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	u32 temp;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	if (time_before(jiffies, bus_state->next_statechange))
		msleep(5);

	spin_lock_irqsave(&xhci->lock, flags);
	if (!HCD_HW_ACCESSIBLE(hcd)) {
		spin_unlock_irqrestore(&xhci->lock, flags);
		return -ESHUTDOWN;
	}

	/* delay the irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp &= ~CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);

	port_index = max_ports;
	while (port_index--) {
		/* Check whether need resume ports. If needed
		   resume port and disable remote wakeup */
		u32 temp;
		int slot_id;

		temp = xhci_readl(xhci, port_array[port_index]);
		if (DEV_SUPERSPEED(temp))
			temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
		else
			temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
		if (test_bit(port_index, &bus_state->bus_suspended) &&
		    (temp & PORT_PLS_MASK)) {
			if (DEV_SUPERSPEED(temp)) {
				xhci_set_link_state(xhci, port_array,
							port_index, XDEV_U0);
			} else {
				xhci_set_link_state(xhci, port_array,
						port_index, XDEV_RESUME);

				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);

				xhci_set_link_state(xhci, port_array,
							port_index, XDEV_U0);
			}
			/* wait for the port to enter U0 and report port link
			 * state change.
			 */
			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(20);
			spin_lock_irqsave(&xhci->lock, flags);

			/* Clear PLC */
			xhci_test_and_clear_bit(xhci, port_array, port_index,
						PORT_PLC);

			slot_id = xhci_find_slot_id_by_port(hcd,
					xhci, port_index + 1);
			if (slot_id)
				xhci_ring_device(xhci, slot_id);
		} else {
			xhci_writel(xhci, temp, port_array[port_index]);
	}

	(void) xhci_readl(xhci, &xhci->op_regs->command);

	bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
	/* re-enable irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp |= CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);
	temp = xhci_readl(xhci, &xhci->op_regs->command);

	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}
Пример #6
0
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, max_portpmsc;
	unsigned long flags;
	u32 temp, status;
	int retval = 0;
	__le32 __iomem **port_array;
	__le32 __iomem **portpmsc_array;
	int slot_id;
	struct xhci_bus_state *bus_state;
	u16 link_state = 0;
	u16 wake_mask = 0;
	u8 selector;

	max_ports = xhci_get_ports(hcd, &port_array);
	max_portpmsc = xhci_get_portpmsc(hcd, &portpmsc_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		/* Check to make sure userspace is asking for the USB 3.0 hub
		 * descriptor for the USB 3.0 roothub.  If not, we stall the
		 * endpoint, like external hubs do.
		 */
		if (hcd->speed == HCD_USB3 &&
				(wLength < USB_DT_SS_HUB_SIZE ||
				 wValue != (USB_DT_SS_HUB << 8))) {
			xhci_dbg(xhci, "Wrong hub descriptor type for "
					"USB 3.0 roothub.\n");
			goto error;
		}
		xhci_hub_descriptor(hcd, xhci,
				(struct usb_hub_descriptor *) buf);
		break;
	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
		if ((wValue & 0xff00) != (USB_DT_BOS << 8))
			goto error;

		if (hcd->speed != HCD_USB3)
			goto error;

		memcpy(buf, &usb_bos_descriptor,
				USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
		temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
		buf[12] = HCS_U1_LATENCY(temp);
		put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);

		spin_unlock_irqrestore(&xhci->lock, flags);
		return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
	case GetPortStatus:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		status = 0;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* wPortChange bits */
		if (temp & PORT_CSC)
			status |= USB_PORT_STAT_C_CONNECTION << 16;
		if (temp & PORT_PEC)
			status |= USB_PORT_STAT_C_ENABLE << 16;
		if ((temp & PORT_OCC))
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
		if ((temp & PORT_RC))
			status |= USB_PORT_STAT_C_RESET << 16;
		/* USB3.0 only */
		if (hcd->speed == HCD_USB3) {
			if ((temp & PORT_PLC))
				status |= USB_PORT_STAT_C_LINK_STATE << 16;
			if ((temp & PORT_WRC))
				status |= USB_PORT_STAT_C_BH_RESET << 16;
			if ((temp & PORT_CEC))
				status |= USB_PORT_STAT_C_CONFIG_ERROR << 16;
		}

		if (hcd->speed != HCD_USB3) {
			if ((temp & PORT_PLS_MASK) == XDEV_U3
					&& (temp & PORT_POWER))
				status |= USB_PORT_STAT_SUSPEND;
		}
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME &&
				!DEV_SUPERSPEED(temp)) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (time_after_eq(jiffies,
					bus_state->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				bus_state->resume_done[wIndex] = 0;
				clear_bit(wIndex, &bus_state->resuming_ports);
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
								 wIndex + 1);
				if (!slot_id) {
					xhci_dbg(xhci, "slot_id is zero\n");
					goto error;
				}
				xhci_ring_device(xhci, slot_id);
				bus_state->port_c_suspend |= 1 << wIndex;
				bus_state->suspended_ports &= ~(1 << wIndex);
			} else {
				/*
				 * The resume has been signaling for less than
				 * 20ms. Report the port status as SUSPEND,
				 * let the usbcore check port status again
				 * and clear resume signaling later.
				 */
				status |= USB_PORT_STAT_SUSPEND;
			}
		}
		if ((temp & PORT_PLS_MASK) == XDEV_U0
			&& (temp & PORT_POWER)
			&& (bus_state->suspended_ports & (1 << wIndex))) {
			bus_state->suspended_ports &= ~(1 << wIndex);
			if (hcd->speed != HCD_USB3)
				bus_state->port_c_suspend |= 1 << wIndex;
		}
		if (temp & PORT_CONNECT) {
			status |= USB_PORT_STAT_CONNECTION;
			status |= xhci_port_speed(temp);
		}
		if (temp & PORT_PE)
			status |= USB_PORT_STAT_ENABLE;
		if (temp & PORT_OC)
			status |= USB_PORT_STAT_OVERCURRENT;
		if (temp & PORT_RESET)
			status |= USB_PORT_STAT_RESET;
		if (temp & PORT_POWER) {
			if (hcd->speed == HCD_USB3)
				status |= USB_SS_PORT_STAT_POWER;
			else
				status |= USB_PORT_STAT_POWER;
		}
		/* Update Port Link State for super speed ports*/
		if (hcd->speed == HCD_USB3) {
			xhci_hub_report_link_state(xhci, &status, temp);
			/*
			 * Verify if all USB3 Ports Have entered U0 already.
			 * Delete Compliance Mode Timer if so.
			 */
			xhci_del_comp_mod_timer(xhci, temp, wIndex);
		}
		if (bus_state->port_c_suspend & (1 << wIndex))
			status |= 1 << USB_PORT_FEAT_C_SUSPEND;
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
		break;
	case SetPortFeature:
		selector = wIndex >> 8;
		if (wValue == USB_PORT_FEAT_LINK_STATE)
			link_state = (wIndex & 0xff00) >> 3;
		if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK)
			wake_mask = wIndex & 0xff00;
		wIndex &= 0xff;
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		temp = xhci_port_state_to_neutral(temp);
		/* FIXME: What new port features do we need to support? */
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PLS_MASK) != XDEV_U0) {
				/* Resume the port to U0 first */
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(10);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			/* In spec software should not attempt to suspend
			 * a port unless the port reports that it is in the
			 * enabled (PED = ??1??,PLS < ??3??) state.
			 */
			temp = xhci_readl(xhci, port_array[wIndex]);
			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
				xhci_warn(xhci, "USB core suspending device "
					  "not in U0/U1/U2.\n");
				goto error;
			}

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_warn(xhci, "slot_id is zero\n");
				goto error;
			}
			/* unlock to execute stop endpoint commands */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_stop_device(xhci, slot_id, 1);
			spin_lock_irqsave(&xhci->lock, flags);

			xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(10); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_LINK_STATE:
			temp = xhci_readl(xhci, port_array[wIndex]);

			/* Disable port */
			if (link_state == USB_SS_PORT_LS_SS_DISABLED) {
				xhci_dbg(xhci, "Disable port %d\n", wIndex);
				temp = xhci_port_state_to_neutral(temp);
				/*
				 * Clear all change bits, so that we get a new
				 * connection event.
				 */
				temp |= PORT_CSC | PORT_PEC | PORT_WRC |
					PORT_OCC | PORT_RC | PORT_PLC |
					PORT_CEC;
				xhci_writel(xhci, temp | PORT_PE,
					port_array[wIndex]);
				temp = xhci_readl(xhci, port_array[wIndex]);
				break;
			}

			/* Put link in RxDetect (enable port) */
			if (link_state == USB_SS_PORT_LS_RX_DETECT) {
				xhci_dbg(xhci, "Enable port %d\n", wIndex);
				xhci_set_link_state(xhci, port_array, wIndex,
						link_state);
				temp = xhci_readl(xhci, port_array[wIndex]);
				break;
			}

			/* Software should not attempt to set
			 * port link state above '3' (U3) and the port
			 * must be enabled.
			 */
			if ((temp & PORT_PE) == 0 ||
				(link_state > USB_SS_PORT_LS_U3)) {
				xhci_warn(xhci, "Cannot set link state.\n");
				goto error;
			}

			if (link_state == USB_SS_PORT_LS_U3) {
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
						wIndex + 1);
				if (slot_id) {
					/* unlock to execute stop endpoint
					 * commands */
					spin_unlock_irqrestore(&xhci->lock,
								flags);
					xhci_stop_device(xhci, slot_id, 1);
					spin_lock_irqsave(&xhci->lock, flags);
				}
			}

			xhci_set_link_state(xhci, port_array, wIndex,
						link_state);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(20); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			if (link_state == USB_SS_PORT_LS_U3)
				bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_POWER:
			/*
			 * Turn on ports, even if there isn't per-port switching.
			 * HC will report connect events even before this is set.
			 * However, khubd will ignore the roothub events until
			 * the roothub is registered.
			 */
			xhci_writel(xhci, temp | PORT_POWER,
					port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		case USB_PORT_FEAT_RESET:
			temp = (temp | PORT_RESET);
			xhci_writel(xhci, temp, port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port reset, actual port %d status  = 0x%x\n", wIndex, temp);
			break;

		/*
		 * For downstream facing ports (these):  one hub port is put
		 * into test mode according to USB2 11.24.2.13, then the hub
		 * must be reset (which for root hub now means rmmod+modprobe,
		 * or else system reboot).  See EHCI 2.3.9 and 4.14 for info
		 * about the EHCI-specific stuff.
		 */
		case USB_PORT_FEAT_TEST:
#ifdef CONFIG_HOST_COMPLIANT_TEST
			retval = xhci_port_test(hcd, selector, wIndex, flags);
			if (retval < 0) {
				xhci_err(xhci, "USB2 Host Test Fail!!!\n");
				goto error;
			}
#endif
			break;
		case USB_PORT_FEAT_REMOTE_WAKE_MASK:
			xhci_set_remote_wake_mask(xhci, port_array,
					wIndex, wake_mask);
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port remote wake mask, "
					"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;
		}
		/* unblock any posted writes */
		temp = xhci_readl(xhci, port_array[wIndex]);
		break;
	case ClearPortFeature:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		/* FIXME: What new port features do we need to support? */
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
			xhci_dbg(xhci, "PORTSC %04x\n", temp);
			if (temp & PORT_RESET)
				goto error;
			if ((temp & PORT_PLS_MASK) == XDEV_U3) {
				if ((temp & PORT_PE) == 0)
					goto error;

				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_RESUME);
				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
			}
			bus_state->port_c_suspend |= 1 << wIndex;

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_dbg(xhci, "slot_id is zero\n");
				goto error;
			}
			xhci_ring_device(xhci, slot_id);
			break;
		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:
		case USB_PORT_FEAT_C_PORT_LINK_STATE:
		case USB_PORT_FEAT_C_PORT_CONFIG_ERROR:
			xhci_clear_port_change_bit(xhci, wValue, wIndex,
					port_array[wIndex], temp);
			break;
		case USB_PORT_FEAT_ENABLE:
			xhci_disable_port(hcd, xhci, wIndex,
					port_array[wIndex], temp);
			break;
		default:
			goto error;
		}
		break;
	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return retval;
}
Пример #7
0
int xhci_bus_suspend(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	if (time_before_eq(jiffies, bus_state->next_statechange))
		usleep_range(10000, 11000);

	spin_lock_irqsave(&xhci->lock, flags);

	if (hcd->self.root_hub->do_remote_wakeup) {
		if (bus_state->resuming_ports ||	/* USB2 */
		    bus_state->port_remote_wakeup) {	/* USB3 */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_dbg(xhci, "suspend failed because a port is resuming\n");
			return -EBUSY;
		}
	}

	port_index = max_ports;
	bus_state->bus_suspended = 0;
	while (port_index--) {
		/* suspend the port if the port is not suspended */
		u32 t1, t2;
		int slot_id;

		t1 = xhci_readl(xhci, port_array[port_index]);
		t2 = xhci_port_state_to_neutral(t1);

		if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
			xhci_dbg(xhci, "port %d not suspended\n", port_index);
			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					port_index + 1);
			if (slot_id) {
				spin_unlock_irqrestore(&xhci->lock, flags);
				xhci_stop_device(xhci, slot_id, 1);
				spin_lock_irqsave(&xhci->lock, flags);
			}
			t2 &= ~PORT_PLS_MASK;
			t2 |= PORT_LINK_STROBE | XDEV_U3;
			set_bit(port_index, &bus_state->bus_suspended);
		}
		/* USB core sets remote wake mask for USB 3.0 hubs,
		 * including the USB 3.0 roothub, but only if CONFIG_PM_RUNTIME
		 * is enabled, so also enable remote wake here.
		 */
		if (hcd->self.root_hub->do_remote_wakeup) {
			if (t1 & PORT_CONNECT) {
				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
				t2 &= ~PORT_WKCONN_E;
			} else {
				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
				t2 &= ~PORT_WKDISC_E;
			}
		} else
			t2 &= ~PORT_WAKE_BITS;

		t1 = xhci_port_state_to_neutral(t1);
		if (t1 != t2) {
			xhci_writel(xhci, t2, port_array[port_index]);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);
		}

		if (hcd->speed != HCD_USB3) {
			/* enable remote wake up for USB 2.0 */
			__le32 __iomem *addr;
			u32 tmp;

			/* Add one to the port status register address to get
			 * the port power control register address.
			 */
			addr = port_array[port_index] + 1;
			tmp = xhci_readl(xhci, addr);
			tmp |= PORT_RWE;
			xhci_writel(xhci, tmp, addr);
			if (xhci->quirks & XHCI_PORTSC_DELAY)
				ndelay(100);
		}
	}
	hcd->state = HC_STATE_SUSPENDED;
	bus_state->next_statechange = jiffies + msecs_to_jiffies(10);
	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}
Пример #8
0
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int ports;
	unsigned long flags;
	u32 temp, temp1, status;
	int retval = 0;
	u32 __iomem **port_array;
	int slot_id;
	struct xhci_bus_state *bus_state;

	if (hcd->speed == HCD_USB3) {
		ports = xhci->num_usb3_ports;
		port_array = xhci->usb3_ports;
	} else {
		ports = xhci->num_usb2_ports;
		port_array = xhci->usb2_ports;
	}
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		/* Check to make sure userspace is asking for the USB 3.0 hub
		 * descriptor for the USB 3.0 roothub.  If not, we stall the
		 * endpoint, like external hubs do.
		 */
		if (hcd->speed == HCD_USB3 &&
				(wLength < USB_DT_SS_HUB_SIZE ||
				 wValue != (USB_DT_SS_HUB << 8))) {
			xhci_dbg(xhci, "Wrong hub descriptor type for "
					"USB 3.0 roothub.\n");
			goto error;
		}
		xhci_hub_descriptor(hcd, xhci,
				(struct usb_hub_descriptor *) buf);
		break;
	case GetPortStatus:
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		status = 0;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* FIXME - should we return a port status value like the USB
		 * 3.0 external hubs do?
		 */
		/* wPortChange bits */
		if (temp & PORT_CSC)
			status |= USB_PORT_STAT_C_CONNECTION << 16;
		if (temp & PORT_PEC)
			status |= USB_PORT_STAT_C_ENABLE << 16;
		if ((temp & PORT_OCC))
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
		/*
		 * FIXME ignoring reset and USB 2.1/3.0 specific
		 * changes
		 */
		if ((temp & PORT_PLS_MASK) == XDEV_U3
			&& (temp & PORT_POWER))
			status |= 1 << USB_PORT_FEAT_SUSPEND;
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies,
						bus_state->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				bus_state->resume_done[wIndex] = 0;
				temp1 = xhci_port_state_to_neutral(temp);
				temp1 &= ~PORT_PLS_MASK;
				temp1 |= PORT_LINK_STROBE | XDEV_U0;
				xhci_writel(xhci, temp1, port_array[wIndex]);

				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
								 wIndex + 1);
				if (!slot_id) {
					xhci_dbg(xhci, "slot_id is zero\n");
					goto error;
				}
				xhci_ring_device(xhci, slot_id);
				bus_state->port_c_suspend |= 1 << wIndex;
				bus_state->suspended_ports &= ~(1 << wIndex);
			}
		}
		if ((temp & PORT_PLS_MASK) == XDEV_U0
			&& (temp & PORT_POWER)
			&& (bus_state->suspended_ports & (1 << wIndex))) {
			bus_state->suspended_ports &= ~(1 << wIndex);
			bus_state->port_c_suspend |= 1 << wIndex;
		}
		if (temp & PORT_CONNECT) {
			status |= USB_PORT_STAT_CONNECTION;
			status |= xhci_port_speed(temp);
		}
		if (temp & PORT_PE)
			status |= USB_PORT_STAT_ENABLE;
		if (temp & PORT_OC)
			status |= USB_PORT_STAT_OVERCURRENT;
		if (temp & PORT_RESET)
			status |= USB_PORT_STAT_RESET;
		if (temp & PORT_POWER)
			status |= USB_PORT_STAT_POWER;
		if (bus_state->port_c_suspend & (1 << wIndex))
			status |= 1 << USB_PORT_FEAT_C_SUSPEND;
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
		break;
	case SetPortFeature:
		wIndex &= 0xff;
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		temp = xhci_port_state_to_neutral(temp);
		/* FIXME: What new port features do we need to support? */
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			/* In spec software should not attempt to suspend
			 * a port unless the port reports that it is in the
			 * enabled (PED = ‘1’,PLS < ‘3’) state.
			 */
			if ((temp & PORT_PE) == 0 || (temp & PORT_RESET)
				|| (temp & PORT_PLS_MASK) >= XDEV_U3) {
				xhci_warn(xhci, "USB core suspending device "
					  "not in U0/U1/U2.\n");
				goto error;
			}

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_warn(xhci, "slot_id is zero\n");
				goto error;
			}
			/* unlock to execute stop endpoint commands */
			spin_unlock_irqrestore(&xhci->lock, flags);
			xhci_stop_device(xhci, slot_id, 1);
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_port_state_to_neutral(temp);
			temp &= ~PORT_PLS_MASK;
			temp |= PORT_LINK_STROBE | XDEV_U3;
			xhci_writel(xhci, temp, port_array[wIndex]);

			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(10); /* wait device to enter */
			spin_lock_irqsave(&xhci->lock, flags);

			temp = xhci_readl(xhci, port_array[wIndex]);
			bus_state->suspended_ports |= 1 << wIndex;
			break;
		case USB_PORT_FEAT_POWER:
			/*
			 * Turn on ports, even if there isn't per-port switching.
			 * HC will report connect events even before this is set.
			 * However, khubd will ignore the roothub events until
			 * the roothub is registered.
			 */
			xhci_writel(xhci, temp | PORT_POWER,
					port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		case USB_PORT_FEAT_RESET:
			temp = (temp | PORT_RESET);
			xhci_writel(xhci, temp, port_array[wIndex]);

			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "set port reset, actual port %d status  = 0x%x\n", wIndex, temp);
			break;
		default:
			goto error;
		}
		/* unblock any posted writes */
		temp = xhci_readl(xhci, port_array[wIndex]);
		break;
	case ClearPortFeature:
		if (!wIndex || wIndex > ports)
			goto error;
		wIndex--;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		/* FIXME: What new port features do we need to support? */
		temp = xhci_port_state_to_neutral(temp);
		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			temp = xhci_readl(xhci, port_array[wIndex]);
			xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n");
			xhci_dbg(xhci, "PORTSC %04x\n", temp);
			if (temp & PORT_RESET)
				goto error;
			if (temp & XDEV_U3) {
				if ((temp & PORT_PE) == 0)
					goto error;
				if (DEV_SUPERSPEED(temp)) {
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_U0;
					xhci_writel(xhci, temp,
							port_array[wIndex]);
					xhci_readl(xhci, port_array[wIndex]);
				} else {
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_RESUME;
					xhci_writel(xhci, temp,
							port_array[wIndex]);

					spin_unlock_irqrestore(&xhci->lock,
							       flags);
					msleep(20);
					spin_lock_irqsave(&xhci->lock, flags);

					temp = xhci_readl(xhci,
							port_array[wIndex]);
					temp = xhci_port_state_to_neutral(temp);
					temp &= ~PORT_PLS_MASK;
					temp |= PORT_LINK_STROBE | XDEV_U0;
					xhci_writel(xhci, temp,
							port_array[wIndex]);
				}
				bus_state->port_c_suspend |= 1 << wIndex;
			}

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,
					wIndex + 1);
			if (!slot_id) {
				xhci_dbg(xhci, "slot_id is zero\n");
				goto error;
			}
			xhci_ring_device(xhci, slot_id);
			break;
		case USB_PORT_FEAT_C_SUSPEND:
			bus_state->port_c_suspend &= ~(1 << wIndex);
		case USB_PORT_FEAT_C_RESET:
		case USB_PORT_FEAT_C_CONNECTION:
		case USB_PORT_FEAT_C_OVER_CURRENT:
		case USB_PORT_FEAT_C_ENABLE:
			xhci_clear_port_change_bit(xhci, wValue, wIndex,
					port_array[wIndex], temp);
			break;
		case USB_PORT_FEAT_ENABLE:
			xhci_disable_port(hcd, xhci, wIndex,
					port_array[wIndex], temp);
			break;
		default:
			goto error;
		}
		break;
	default:
error:
		/* "stall" on error */
		retval = -EPIPE;
	}
	spin_unlock_irqrestore(&xhci->lock, flags);
	return retval;
}