---

yaml
---
r: 265024
b: refs/heads/master
c: 9574323
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fc71ff7583b14347fa1cb592b698f088ecff36e3
+refs/heads/master: 9574323c39d1f8359a04843075d89c9f32d8b7e6

trunk/drivers/usb/host/xhci-mem.c

@@ -1685,6 +1685,8 @@ void xhci_free_command(struct xhci_hcd *xhci,
 void xhci_mem_cleanup(struct xhci_hcd *xhci)
 {
 	struct pci_dev	*pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+	struct dev_info	*dev_info, *next;
+	unsigned long	flags;
 	int size;
 	int i;
 
@@ -1742,6 +1744,13 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
 
 	scratchpad_free(xhci);
 
+	spin_lock_irqsave(&xhci->lock, flags);
+	list_for_each_entry_safe(dev_info, next, &xhci->lpm_failed_devs, list) {
+		list_del(&dev_info->list);
+		kfree(dev_info);
+	}
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
 	xhci->num_usb2_ports = 0;
 	xhci->num_usb3_ports = 0;
 	kfree(xhci->usb2_ports);
@@ -2328,6 +2337,8 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 	if (xhci_setup_port_arrays(xhci, flags))
 		goto fail;
 
+	INIT_LIST_HEAD(&xhci->lpm_failed_devs);
+
 	return 0;
 
 fail:

trunk/drivers/usb/host/xhci-pci.c

@@ -345,6 +345,10 @@ static const struct hc_driver xhci_pci_hc_driver = {
 	.hub_status_data =	xhci_hub_status_data,
 	.bus_suspend =		xhci_bus_suspend,
 	.bus_resume =		xhci_bus_resume,
+	/*
+	 * call back when device connected and addressed
+	 */
+	.update_device =        xhci_update_device,
 };
 
 /*-------------------------------------------------------------------------*/

trunk/drivers/usb/host/xhci.c

@@ -3539,6 +3539,187 @@ int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
 	return 0;
 }
 
+#ifdef CONFIG_USB_SUSPEND
+
+/* BESL to HIRD Encoding array for USB2 LPM */
+static int xhci_besl_encoding[16] = {125, 150, 200, 300, 400, 500, 1000, 2000,
+	3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000};
+
+/* Calculate HIRD/BESL for USB2 PORTPMSC*/
+static int xhci_calculate_hird_besl(int u2del, bool use_besl)
+{
+	int hird;
+
+	if (use_besl) {
+		for (hird = 0; hird < 16; hird++) {
+			if (xhci_besl_encoding[hird] >= u2del)
+				break;
+		}
+	} else {
+		if (u2del <= 50)
+			hird = 0;
+		else
+			hird = (u2del - 51) / 75 + 1;
+
+		if (hird > 15)
+			hird = 15;
+	}
+
+	return hird;
+}
+
+static int xhci_usb2_software_lpm_test(struct usb_hcd *hcd,
+					struct usb_device *udev)
+{
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	struct dev_info	*dev_info;
+	__le32 __iomem	**port_array;
+	__le32 __iomem	*addr, *pm_addr;
+	u32		temp, dev_id;
+	unsigned int	port_num;
+	unsigned long	flags;
+	int		u2del, hird;
+	int		ret;
+
+	if (hcd->speed == HCD_USB3 || !xhci->sw_lpm_support ||
+			!udev->lpm_capable)
+		return -EINVAL;
+
+	/* we only support lpm for non-hub device connected to root hub yet */
+	if (!udev->parent || udev->parent->parent ||
+			udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+		return -EINVAL;
+
+	spin_lock_irqsave(&xhci->lock, flags);
+
+	/* Look for devices in lpm_failed_devs list */
+	dev_id = le16_to_cpu(udev->descriptor.idVendor) << 16 |
+			le16_to_cpu(udev->descriptor.idProduct);
+	list_for_each_entry(dev_info, &xhci->lpm_failed_devs, list) {
+		if (dev_info->dev_id == dev_id) {
+			ret = -EINVAL;
+			goto finish;
+		}
+	}
+
+	port_array = xhci->usb2_ports;
+	port_num = udev->portnum - 1;
+
+	if (port_num > HCS_MAX_PORTS(xhci->hcs_params1)) {
+		xhci_dbg(xhci, "invalid port number %d\n", udev->portnum);
+		ret = -EINVAL;
+		goto finish;
+	}
+
+	/*
+	 * Test USB 2.0 software LPM.
+	 * FIXME: some xHCI 1.0 hosts may implement a new register to set up
+	 * hardware-controlled USB 2.0 LPM. See section 5.4.11 and 4.23.5.1.1.1
+	 * in the June 2011 errata release.
+	 */
+	xhci_dbg(xhci, "test port %d software LPM\n", port_num);
+	/*
+	 * Set L1 Device Slot and HIRD/BESL.
+	 * Check device's USB 2.0 extension descriptor to determine whether
+	 * HIRD or BESL shoule be used. See USB2.0 LPM errata.
+	 */
+	pm_addr = port_array[port_num] + 1;
+	u2del = HCS_U2_LATENCY(xhci->hcs_params3);
+	if (le32_to_cpu(udev->bos->ext_cap->bmAttributes) & (1 << 2))
+		hird = xhci_calculate_hird_besl(u2del, 1);
+	else
+		hird = xhci_calculate_hird_besl(u2del, 0);
+
+	temp = PORT_L1DS(udev->slot_id) | PORT_HIRD(hird);
+	xhci_writel(xhci, temp, pm_addr);
+
+	/* Set port link state to U2(L1) */
+	addr = port_array[port_num];
+	xhci_set_link_state(xhci, port_array, port_num, XDEV_U2);
+
+	/* wait for ACK */
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	msleep(10);
+	spin_lock_irqsave(&xhci->lock, flags);
+
+	/* Check L1 Status */
+	ret = handshake(xhci, pm_addr, PORT_L1S_MASK, PORT_L1S_SUCCESS, 125);
+	if (ret != -ETIMEDOUT) {
+		/* enter L1 successfully */
+		temp = xhci_readl(xhci, addr);
+		xhci_dbg(xhci, "port %d entered L1 state, port status 0x%x\n",
+				port_num, temp);
+		ret = 0;
+	} else {
+		temp = xhci_readl(xhci, pm_addr);
+		xhci_dbg(xhci, "port %d software lpm failed, L1 status %d\n",
+				port_num, temp & PORT_L1S_MASK);
+		ret = -EINVAL;
+	}
+
+	/* Resume the port */
+	xhci_set_link_state(xhci, port_array, port_num, XDEV_U0);
+
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	msleep(10);
+	spin_lock_irqsave(&xhci->lock, flags);
+
+	/* Clear PLC */
+	xhci_test_and_clear_bit(xhci, port_array, port_num, PORT_PLC);
+
+	/* Check PORTSC to make sure the device is in the right state */
+	if (!ret) {
+		temp = xhci_readl(xhci, addr);
+		xhci_dbg(xhci, "resumed port %d status 0x%x\n",	port_num, temp);
+		if (!(temp & PORT_CONNECT) || !(temp & PORT_PE) ||
+				(temp & PORT_PLS_MASK) != XDEV_U0) {
+			xhci_dbg(xhci, "port L1 resume fail\n");
+			ret = -EINVAL;
+		}
+	}
+
+	if (ret) {
+		/* Insert dev to lpm_failed_devs list */
+		xhci_warn(xhci, "device LPM test failed, may disconnect and "
+				"re-enumerate\n");
+		dev_info = kzalloc(sizeof(struct dev_info), GFP_ATOMIC);
+		if (!dev_info) {
+			ret = -ENOMEM;
+			goto finish;
+		}
+		dev_info->dev_id = dev_id;
+		INIT_LIST_HEAD(&dev_info->list);
+		list_add(&dev_info->list, &xhci->lpm_failed_devs);
+	} else {
+		xhci_ring_device(xhci, udev->slot_id);
+	}
+
+finish:
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return ret;
+}
+
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int		ret;
+
+	ret = xhci_usb2_software_lpm_test(hcd, udev);
+	if (!ret)
+		xhci_dbg(xhci, "software LPM test succeed\n");
+
+	return 0;
+}
+
+#else
+
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	return 0;
+}
+
+#endif /* CONFIG_USB_SUSPEND */
+
 /* Once a hub descriptor is fetched for a device, we need to update the xHC's
  * internal data structures for the device.
  */

trunk/drivers/usb/host/xhci.h

@@ -272,6 +272,7 @@ struct xhci_op_regs {
  */
 #define PORT_PLS_MASK	(0xf << 5)
 #define XDEV_U0		(0x0 << 5)
+#define XDEV_U2		(0x2 << 5)
 #define XDEV_U3		(0x3 << 5)
 #define XDEV_RESUME	(0xf << 5)
 /* true: port has power (see HCC_PPC) */
@@ -362,7 +363,11 @@ struct xhci_op_regs {
 /* Bits 24:31 for port testing */
 
 /* USB2 Protocol PORTSPMSC */
-#define PORT_RWE	(1 << 0x3)
+#define	PORT_L1S_MASK		7
+#define	PORT_L1S_SUCCESS	1
+#define	PORT_RWE		(1 << 3)
+#define	PORT_HIRD(p)		(((p) & 0xf) << 4)
+#define	PORT_L1DS(p)		(((p) & 0xff) << 8)
 
 /**
  * struct xhci_intr_reg - Interrupt Register Set
@@ -1324,6 +1329,12 @@ struct s3_save {
 	u64	erst_dequeue;
 };
 
+/* Use for lpm */
+struct dev_info {
+	u32			dev_id;
+	struct	list_head	list;
+};
+
 struct xhci_bus_state {
 	unsigned long		bus_suspended;
 	unsigned long		next_statechange;
@@ -1387,6 +1398,8 @@ struct xhci_hcd {
 	struct xhci_erst	erst;
 	/* Scratchpad */
 	struct xhci_scratchpad  *scratchpad;
+	/* Store LPM test failed devices' information */
+	struct list_head	lpm_failed_devs;
 
 	/* slot enabling and address device helpers */
 	struct completion	addr_dev;
@@ -1663,6 +1676,7 @@ int xhci_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
 		struct usb_host_endpoint **eps, unsigned int num_eps,
 		gfp_t mem_flags);
 int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev);
 int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev,
 			struct usb_tt *tt, gfp_t mem_flags);
 int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);