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Commit c9682dff authored by Andiry Xu's avatar Andiry Xu Committed by Greg Kroah-Hartman
Browse files

xHCI: set link state 



Introduce xhci_set_link_state() to remove redundant codes.

Signed-off-by: default avatarAndiry Xu <andiry.xu@amd.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1ff4df56

drivers/usb/host/xhci-hub.c

+29 −43
Original line number Diff line number Diff line
@@ -392,13 +392,25 @@ static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array) 
	return max_ports;

}



void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,

				int port_id, u32 link_state)

{

	u32 temp;



	temp = xhci_readl(xhci, port_array[port_id]);

	temp = xhci_port_state_to_neutral(temp);

	temp &= ~PORT_PLS_MASK;

	temp |= PORT_LINK_STROBE | link_state;

	xhci_writel(xhci, temp, port_array[port_id]);

}



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, temp1, status;

	u32 temp, status;

	int retval = 0;

	__le32 __iomem **port_array;

	int slot_id;
@@ -472,11 +484,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 
				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_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,
@@ -573,10 +582,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 
			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]);

			xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);



			spin_unlock_irqrestore(&xhci->lock, flags);

			msleep(10); /* wait device to enter */
@@ -610,10 +616,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 
				}

			}



			temp = xhci_port_state_to_neutral(temp);

			temp &= ~PORT_PLS_MASK;

			temp |= PORT_LINK_STROBE | link_state;

			xhci_writel(xhci, temp, port_array[wIndex]);

			xhci_set_link_state(xhci, port_array, wIndex,

						link_state);



			spin_unlock_irqrestore(&xhci->lock, flags);

			msleep(20); /* wait device to enter */
@@ -677,24 +681,13 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 
				if ((temp & PORT_PE) == 0)

					goto error;



				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);

				xhci_set_link_state(xhci, port_array, wIndex,

							XDEV_RESUME);

				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]);

				xhci_set_link_state(xhci, port_array, wIndex,

							XDEV_U0);

			}

			bus_state->port_c_suspend |= 1 << wIndex;
@@ -910,25 +903,18 @@ int xhci_bus_resume(struct usb_hcd *hcd) 
		if (test_bit(port_index, &bus_state->bus_suspended) &&

		    (temp & PORT_PLS_MASK)) {

			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[port_index]);

				xhci_set_link_state(xhci, port_array,

							port_index, XDEV_U0);

			} else {

				temp = xhci_port_state_to_neutral(temp);

				temp &= ~PORT_PLS_MASK;

				temp |= PORT_LINK_STROBE | XDEV_RESUME;

				xhci_writel(xhci, temp, port_array[port_index]);

				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);



				temp = xhci_readl(xhci, port_array[port_index]);

				temp = xhci_port_state_to_neutral(temp);

				temp &= ~PORT_PLS_MASK;

				temp |= PORT_LINK_STROBE | XDEV_U0;

				xhci_writel(xhci, temp, port_array[port_index]);

				xhci_set_link_state(xhci, port_array,

							port_index, XDEV_U0);

			}

			/* wait for the port to enter U0 and report port link

			 * state change.

drivers/usb/host/xhci-ring.c

+2 −4
Original line number Diff line number Diff line
@@ -1329,10 +1329,8 @@ static void handle_port_status(struct xhci_hcd *xhci, 


		if (DEV_SUPERSPEED(temp)) {

			xhci_dbg(xhci, "resume SS port %d\n", port_id);

			temp = xhci_port_state_to_neutral(temp);

			temp &= ~PORT_PLS_MASK;

			temp |= PORT_LINK_STROBE | XDEV_U0;

			xhci_writel(xhci, temp, port_array[faked_port_index]);

			xhci_set_link_state(xhci, port_array, faked_port_index,

						XDEV_U0);

			slot_id = xhci_find_slot_id_by_port(hcd, xhci,

					faked_port_index);

			if (!slot_id) {

drivers/usb/host/xhci.h

+2 −0
Original line number Diff line number Diff line
@@ -1717,6 +1717,8 @@ void xhci_ring_ep_doorbell(struct xhci_hcd *xhci, unsigned int slot_id, 
		unsigned int ep_index, unsigned int stream_id);



/* xHCI roothub code */

void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,

				int port_id, u32 link_state);

int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,

		char *buf, u16 wLength);

int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);