Commit 395f5409 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
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xhci: support new USB 3.1 hub request to get extended port status 



USB 3.1 adds different types of Get Port Status request.
The Get Extended Port Status request returns 4 additional bytes
after the normal portstatus and portchange words containing
link speed and lane information about a connected enhanced super
speed device

Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b50107bb

drivers/usb/host/xhci-hub.c

+29 −0
Original line number Diff line number Diff line
@@ -659,6 +659,22 @@ static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status, 
	}

}



static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)

{

	u32 ext_stat = 0;

	int speed_id;



	/* only support rx and tx lane counts of 1 in usb3.1 spec */

	speed_id = DEV_PORT_SPEED(raw_port_status);

	ext_stat |= speed_id;		/* bits 3:0, RX speed id */

	ext_stat |= speed_id << 4;	/* bits 7:4, TX speed id */



	ext_stat |= PORT_RX_LANES(port_li) << 8;  /* bits 11:8 Rx lane count */

	ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */



	return ext_stat;

}



/*

 * Converts a raw xHCI port status into the format that external USB 2.0 or USB

 * 3.0 hubs use.
@@ -874,6 +890,19 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 
		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);



		put_unaligned(cpu_to_le32(status), (__le32 *) buf);

		/* if USB 3.1 extended port status return additional 4 bytes */

		if (wValue == 0x02) {

			u32 port_li;



			if (hcd->speed < HCD_USB31 || wLength != 8) {

				xhci_err(xhci, "get ext port status invalid parameter\n");

				retval = -EINVAL;

				break;

			}

			port_li = readl(port_array[wIndex] + PORTLI);

			status = xhci_get_ext_port_status(temp, port_li);

			put_unaligned_le32(cpu_to_le32(status), &buf[4]);

		}

		break;

	case SetPortFeature:

		if (wValue == USB_PORT_FEAT_LINK_STATE)

drivers/usb/host/xhci.h

+4 −0
Original line number Diff line number Diff line
@@ -335,6 +335,7 @@ struct xhci_op_regs { 
#define DEV_SUPERSPEED(p)	(((p) & DEV_SPEED_MASK) == XDEV_SS)

#define DEV_SUPERSPEEDPLUS(p)	(((p) & DEV_SPEED_MASK) == XDEV_SSP)

#define DEV_SUPERSPEED_ANY(p)	(((p) & DEV_SPEED_MASK) >= XDEV_SS)

#define DEV_PORT_SPEED(p)	(((p) >> 10) & 0x0f)



/* Bits 20:23 in the Slot Context are the speed for the device */

#define	SLOT_SPEED_FS		(XDEV_FS << 10)
@@ -419,6 +420,9 @@ struct xhci_op_regs { 
#define	PORT_L1DS(p)		(((p) & 0xff) << 8)

#define	PORT_HLE		(1 << 16)



/* USB3 Protocol PORTLI  Port Link Information */

#define PORT_RX_LANES(p)	(((p) >> 16) & 0xf)

#define PORT_TX_LANES(p)	(((p) >> 20) & 0xf)



/* USB2 Protocol PORTHLPMC */

#define PORT_HIRDM(p)((p) & 3)

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