Merge branch 'usb-3.3-rc4' into usb-next

This is to pull in the xhci changes and the other fixes and device id
updates that were done in Linus's tree.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

11 files changed, 303 insertions, 17 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index c26a82e83f6e..10e008a730a5 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -323,7 +323,9 @@ static int ehci_fsl_setup(struct usb_hcd *hcd)
         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
         int retval;
         struct fsl_usb2_platform_data *pdata;
+        struct device *dev;
 
+        dev = hcd->self.controller;
         pdata = hcd->self.controller->platform_data;
         ehci->big_endian_desc = pdata->big_endian_desc;
         ehci->big_endian_mmio = pdata->big_endian_mmio;
@@ -353,6 +355,16 @@ static int ehci_fsl_setup(struct usb_hcd *hcd)
 
         ehci_reset(ehci);
 
+        if (of_device_is_compatible(dev->parent->of_node,
+                                    "fsl,mpc5121-usb2-dr")) {
+                /*
+                 * set SBUSCFG:AHBBRST so that control msgs don't
+                 * fail when doing heavy PATA writes.
+                 */
+                ehci_writel(ehci, SBUSCFG_INCR8,
+                            hcd->regs + FSL_SOC_USB_SBUSCFG);
+        }
+
         retval = ehci_fsl_reinit(ehci);
         return retval;
 }
@@ -476,6 +488,8 @@ static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 
+        ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
+
         /* restore EHCI registers */
         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
diff --git a/drivers/usb/host/ehci-fsl.h b/drivers/usb/host/ehci-fsl.h
index bdf43e2adc51..6d5a94e9bb3c 100644
--- a/drivers/usb/host/ehci-fsl.h
+++ b/drivers/usb/host/ehci-fsl.h
@@ -19,6 +19,8 @@
 #define _EHCI_FSL_H
 
 /* offsets for the non-ehci registers in the FSL SOC USB controller */
+#define FSL_SOC_USB_SBUSCFG     0x90
+#define SBUSCFG_INCR8           0x02    /* INCR8, specified */
 #define FSL_SOC_USB_ULPIVP      0x170
 #define FSL_SOC_USB_PORTSC1     0x184
 #define PORT_PTS_MSK            (3<<30)
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index a007a9fe0f87..4918b0c59af9 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1376,6 +1376,11 @@ MODULE_LICENSE ("GPL");
 #define        PLATFORM_DRIVER         ehci_mv_driver
 #endif
 
+#ifdef CONFIG_MACH_LOONGSON1
+#include "ehci-ls1x.c"
+#define PLATFORM_DRIVER         ehci_ls1x_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
     !defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 77bbb2357e47..01011dd0cb5d 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -107,7 +107,7 @@ static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
         ehci->owned_ports = 0;
 }
 
-static int ehci_port_change(struct ehci_hcd *ehci)
+static int __maybe_unused ehci_port_change(struct ehci_hcd *ehci)
 {
         int i = HCS_N_PORTS(ehci->hcs_params);
 
@@ -1076,7 +1076,8 @@ error_exit:
         return retval;
 }
 
-static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
+static void __maybe_unused ehci_relinquish_port(struct usb_hcd *hcd,
+                int portnum)
 {
         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
 
@@ -1085,7 +1086,8 @@ static void ehci_relinquish_port(struct usb_hcd *hcd, int portnum)
         set_owner(ehci, --portnum, PORT_OWNER);
 }
 
-static int ehci_port_handed_over(struct usb_hcd *hcd, int portnum)
+static int __maybe_unused ehci_port_handed_over(struct usb_hcd *hcd,
+                int portnum)
 {
         struct ehci_hcd         *ehci = hcd_to_ehci(hcd);
         u32 __iomem             *reg;
diff --git a/drivers/usb/host/ehci-ls1x.c b/drivers/usb/host/ehci-ls1x.c
new file mode 100644
index 000000000000..a283e59709d6
--- /dev/null
+++ b/drivers/usb/host/ehci-ls1x.c
@@ -0,0 +1,159 @@
+/*
+ *  Bus Glue for Loongson LS1X built-in EHCI controller.
+ *
+ *  Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+
+#include <linux/platform_device.h>
+
+static int ehci_ls1x_reset(struct usb_hcd *hcd)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        int ret;
+
+        ehci->caps = hcd->regs;
+
+        ret = ehci_setup(hcd);
+        if (ret)
+                return ret;
+
+        ehci_port_power(ehci, 0);
+
+        return 0;
+}
+
+static const struct hc_driver ehci_ls1x_hc_driver = {
+        .description            = hcd_name,
+        .product_desc           = "LOONGSON1 EHCI",
+        .hcd_priv_size          = sizeof(struct ehci_hcd),
+
+        /*
+         * generic hardware linkage
+         */
+        .irq                    = ehci_irq,
+        .flags                  = HCD_MEMORY | HCD_USB2,
+
+        /*
+         * basic lifecycle operations
+         */
+        .reset                  = ehci_ls1x_reset,
+        .start                  = ehci_run,
+        .stop                   = ehci_stop,
+        .shutdown               = ehci_shutdown,
+
+        /*
+         * managing i/o requests and associated device resources
+         */
+        .urb_enqueue            = ehci_urb_enqueue,
+        .urb_dequeue            = ehci_urb_dequeue,
+        .endpoint_disable       = ehci_endpoint_disable,
+        .endpoint_reset         = ehci_endpoint_reset,
+
+        /*
+         * scheduling support
+         */
+        .get_frame_number       = ehci_get_frame,
+
+        /*
+         * root hub support
+         */
+        .hub_status_data        = ehci_hub_status_data,
+        .hub_control            = ehci_hub_control,
+        .relinquish_port        = ehci_relinquish_port,
+        .port_handed_over       = ehci_port_handed_over,
+
+        .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_hcd_ls1x_probe(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd;
+        struct resource *res;
+        int irq;
+        int ret;
+
+        pr_debug("initializing loongson1 ehci USB Controller\n");
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!res) {
+                dev_err(&pdev->dev,
+                        "Found HC with no IRQ. Check %s setup!\n",
+                        dev_name(&pdev->dev));
+                return -ENODEV;
+        }
+        irq = res->start;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev,
+                        "Found HC with no register addr. Check %s setup!\n",
+                        dev_name(&pdev->dev));
+                return -ENODEV;
+        }
+
+        hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev,
+                                dev_name(&pdev->dev));
+        if (!hcd)
+                return -ENOMEM;
+        hcd->rsrc_start = res->start;
+        hcd->rsrc_len   = resource_size(res);
+
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                dev_dbg(&pdev->dev, "controller already in use\n");
+                ret = -EBUSY;
+                goto err_put_hcd;
+        }
+
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        if (hcd->regs == NULL) {
+                dev_dbg(&pdev->dev, "error mapping memory\n");
+                ret = -EFAULT;
+                goto err_release_region;
+        }
+
+        ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+        if (ret)
+                goto err_iounmap;
+
+        return ret;
+
+err_iounmap:
+        iounmap(hcd->regs);
+err_release_region:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_put_hcd:
+        usb_put_hcd(hcd);
+        return ret;
+}
+
+static int ehci_hcd_ls1x_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+        usb_remove_hcd(hcd);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+
+        return 0;
+}
+
+static struct platform_driver ehci_ls1x_driver = {
+        .probe = ehci_hcd_ls1x_probe,
+        .remove = ehci_hcd_ls1x_remove,
+        .shutdown = usb_hcd_platform_shutdown,
+        .driver = {
+                .name = "ls1x-ehci",
+                .owner  = THIS_MODULE,
+        },
+};
+
+MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci");
diff --git a/drivers/usb/host/imx21-dbg.c b/drivers/usb/host/imx21-dbg.c
index 6d7533427163..ec98ecee3517 100644
--- a/drivers/usb/host/imx21-dbg.c
+++ b/drivers/usb/host/imx21-dbg.c
@@ -239,7 +239,7 @@ static int debug_status_show(struct seq_file *s, void *v)
                 "ETDs allocated: %d/%d (max=%d)\n"
                 "ETDs in use sw: %d\n"
                 "ETDs in use hw: %d\n"
-                "DMEM alocated: %d/%d (max=%d)\n"
+                "DMEM allocated: %d/%d (max=%d)\n"
                 "DMEM blocks: %d\n"
                 "Queued waiting for ETD: %d\n"
                 "Queued waiting for DMEM: %d\n",
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 6b5eb1017e2c..e37dea87bb56 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -565,6 +565,9 @@ static int uhci_start(struct usb_hcd *hcd)
         struct dentry __maybe_unused *dentry;
 
         hcd->uses_new_polling = 1;
+        /* Accept arbitrarily long scatter-gather lists */
+        if (!(hcd->driver->flags & HCD_LOCAL_MEM))
+                hcd->self.sg_tablesize = ~0;
 
         spin_lock_init(&uhci->lock);
         setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 557b6f32db86..673ad120c43e 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -422,6 +422,32 @@ void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array,
         xhci_writel(xhci, temp, port_array[port_id]);
 }
 
+void xhci_set_remote_wake_mask(struct xhci_hcd *xhci,
+                __le32 __iomem **port_array, int port_id, u16 wake_mask)
+{
+        u32 temp;
+
+        temp = xhci_readl(xhci, port_array[port_id]);
+        temp = xhci_port_state_to_neutral(temp);
+
+        if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT)
+                temp |= PORT_WKCONN_E;
+        else
+                temp &= ~PORT_WKCONN_E;
+
+        if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT)
+                temp |= PORT_WKDISC_E;
+        else
+                temp &= ~PORT_WKDISC_E;
+
+        if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT)
+                temp |= PORT_WKOC_E;
+        else
+                temp &= ~PORT_WKOC_E;
+
+        xhci_writel(xhci, temp, port_array[port_id]);
+}
+
 /* Test and clear port RWC bit */
 void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array,
                                 int port_id, u32 port_bit)
@@ -448,6 +474,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
         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)];
@@ -593,6 +620,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
         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;
@@ -703,6 +732,14 @@ 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_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]);
@@ -883,6 +920,10 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
                         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;
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 383fc857491c..8339d826ce58 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -2157,7 +2157,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
         unsigned int    val, val2;
         u64             val_64;
         struct xhci_segment     *seg;
-        u32 page_size;
+        u32 page_size, temp;
         int i;
 
         page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
@@ -2340,6 +2340,15 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 
         INIT_LIST_HEAD(&xhci->lpm_failed_devs);
 
+        /* Enable USB 3.0 device notifications for function remote wake, which
+         * is necessary for allowing USB 3.0 devices to do remote wakeup from
+         * U3 (device suspend).
+         */
+        temp = xhci_readl(xhci, &xhci->op_regs->dev_notification);
+        temp &= ~DEV_NOTE_MASK;
+        temp |= DEV_NOTE_FWAKE;
+        xhci_writel(xhci, temp, &xhci->op_regs->dev_notification);
+
         return 0;
 
 fail:
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index b62037bff688..3a033240ec64 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1237,6 +1237,26 @@ static unsigned int find_faked_portnum_from_hw_portnum(struct usb_hcd *hcd,
         return num_similar_speed_ports;
 }
 
+static void handle_device_notification(struct xhci_hcd *xhci,
+                union xhci_trb *event)
+{
+        u32 slot_id;
+        struct usb_device *udev;
+
+        slot_id = TRB_TO_SLOT_ID(event->generic.field[3]);
+        if (!xhci->devs[slot_id]) {
+                xhci_warn(xhci, "Device Notification event for "
+                                "unused slot %u\n", slot_id);
+                return;
+        }
+
+        xhci_dbg(xhci, "Device Wake Notification event for slot ID %u\n",
+                        slot_id);
+        udev = xhci->devs[slot_id]->udev;
+        if (udev && udev->parent)
+                usb_wakeup_notification(udev->parent, udev->portnum);
+}
+
 static void handle_port_status(struct xhci_hcd *xhci,
                 union xhci_trb *event)
 {
@@ -1321,20 +1341,21 @@ static void handle_port_status(struct xhci_hcd *xhci,
                 }
 
                 if (DEV_SUPERSPEED(temp)) {
-                        xhci_dbg(xhci, "resume SS port %d\n", port_id);
+                        xhci_dbg(xhci, "remote wake SS port %d\n", port_id);
+                        /* Set a flag to say the port signaled remote wakeup,
+                         * so we can tell the difference between the end of
+                         * device and host initiated resume.
+                         */
+                        bus_state->port_remote_wakeup |= 1 << faked_port_index;
+                        xhci_test_and_clear_bit(xhci, port_array,
+                                        faked_port_index, PORT_PLC);
                         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 + 1);
-                        if (!slot_id) {
-                                xhci_dbg(xhci, "slot_id is zero\n");
-                                goto cleanup;
-                        }
-                        xhci_ring_device(xhci, slot_id);
-                        xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
-                        /* Clear PORT_PLC */
-                        xhci_test_and_clear_bit(xhci, port_array,
-                                                faked_port_index, PORT_PLC);
+                        /* Need to wait until the next link state change
+                         * indicates the device is actually in U0.
+                         */
+                        bogus_port_status = true;
+                        goto cleanup;
                 } else {
                         xhci_dbg(xhci, "resume HS port %d\n", port_id);
                         bus_state->resume_done[faked_port_index] = jiffies +
@@ -1345,6 +1366,32 @@ static void handle_port_status(struct xhci_hcd *xhci,
                 }
         }
 
+        if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_U0 &&
+                        DEV_SUPERSPEED(temp)) {
+                xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
+                /* We've just brought the device into U0 through either the
+                 * Resume state after a device remote wakeup, or through the
+                 * U3Exit state after a host-initiated resume.  If it's a device
+                 * initiated remote wake, don't pass up the link state change,
+                 * so the roothub behavior is consistent with external
+                 * USB 3.0 hub behavior.
+                 */
+                slot_id = xhci_find_slot_id_by_port(hcd, xhci,
+                                faked_port_index + 1);
+                if (slot_id && xhci->devs[slot_id])
+                        xhci_ring_device(xhci, slot_id);
+                if (bus_state->port_remote_wakeup && (1 << faked_port_index)) {
+                        bus_state->port_remote_wakeup &=
+                                ~(1 << faked_port_index);
+                        xhci_test_and_clear_bit(xhci, port_array,
+                                        faked_port_index, PORT_PLC);
+                        usb_wakeup_notification(hcd->self.root_hub,
+                                        faked_port_index + 1);
+                        bogus_port_status = true;
+                        goto cleanup;
+                }
+        }
+
         if (hcd->speed != HCD_USB3)
                 xhci_test_and_clear_bit(xhci, port_array, faked_port_index,
                                         PORT_PLC);
@@ -2277,6 +2324,9 @@ static int xhci_handle_event(struct xhci_hcd *xhci)
                 else
                         update_ptrs = 0;
                 break;
+        case TRB_TYPE(TRB_DEV_NOTE):
+                handle_device_notification(xhci, event);
+                break;
         default:
                 if ((le32_to_cpu(event->event_cmd.flags) & TRB_TYPE_BITMASK) >=
                     TRB_TYPE(48))
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index fb99c8379142..0f4936956103 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1344,6 +1344,7 @@ struct xhci_bus_state {
         /* ports suspend status arrays - max 31 ports for USB2, 15 for USB3 */
         u32                     port_c_suspend;
         u32                     suspended_ports;
+        u32                     port_remote_wakeup;
         unsigned long           resume_done[USB_MAXCHILDREN];
 };