Merge branch 'for-rmk/broadcast' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable

6 files changed, 70 insertions, 87 deletions

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index d6bb128ce21e..3a21c5d683c0 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -148,7 +148,7 @@ config USB_EHCI_FSL
           Variation of ARC USB block used in some Freescale chips.
 
 config USB_EHCI_MXC
-        bool "Support for Freescale i.MX on-chip EHCI USB controller"
+        tristate "Support for Freescale i.MX on-chip EHCI USB controller"
         depends on USB_EHCI_HCD && ARCH_MXC
         select USB_EHCI_ROOT_HUB_TT
         ---help---
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 1eb4c3006e9e..001fbff2fdef 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_PCI)		+= pci-quirks.o
 obj-$(CONFIG_USB_EHCI_HCD)      += ehci-hcd.o
 obj-$(CONFIG_USB_EHCI_PCI)      += ehci-pci.o
 obj-$(CONFIG_USB_EHCI_HCD_PLATFORM)     += ehci-platform.o
+obj-$(CONFIG_USB_EHCI_MXC)      += ehci-mxc.o
 
 obj-$(CONFIG_USB_OXU210HP_HCD)  += oxu210hp-hcd.o
 obj-$(CONFIG_USB_ISP116X_HCD)   += isp116x-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c97503bb0b0e..09537b2f1002 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -74,10 +74,6 @@ static const char	hcd_name [] = "ehci_hcd";
 #undef VERBOSE_DEBUG
 #undef EHCI_URB_TRACE
 
-#ifdef DEBUG
-#define EHCI_STATS
-#endif
-
 /* magic numbers that can affect system performance */
 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
@@ -1250,11 +1246,6 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ehci_fsl_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_MXC
-#include "ehci-mxc.c"
-#define PLATFORM_DRIVER         ehci_mxc_driver
-#endif
-
 #ifdef CONFIG_USB_EHCI_SH
 #include "ehci-sh.c"
 #define PLATFORM_DRIVER         ehci_hcd_sh_driver
@@ -1352,7 +1343,8 @@ MODULE_LICENSE ("GPL");
 
 #if !IS_ENABLED(CONFIG_USB_EHCI_PCI) && \
         !IS_ENABLED(CONFIG_USB_EHCI_HCD_PLATFORM) && \
-        !defined(CONFIG_USB_CHIPIDEA_HOST) && \
+        !IS_ENABLED(CONFIG_USB_CHIPIDEA_HOST) && \
+        !IS_ENABLED(CONFIG_USB_EHCI_MXC) && \
         !defined(PLATFORM_DRIVER) && \
         !defined(PS3_SYSTEM_BUS_DRIVER) && \
         !defined(OF_PLATFORM_DRIVER) && \
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
index ec7f5d2c90de..dedb80bb8d40 100644
--- a/drivers/usb/host/ehci-mxc.c
+++ b/drivers/usb/host/ehci-mxc.c
@@ -17,75 +17,38 @@
  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/usb/otg.h>
 #include <linux/usb/ulpi.h>
 #include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
 
 #include <linux/platform_data/usb-ehci-mxc.h>
 
 #include <asm/mach-types.h>
 
+#include "ehci.h"
+
+#define DRIVER_DESC "Freescale On-Chip EHCI Host driver"
+
+static const char hcd_name[] = "ehci-mxc";
+
 #define ULPI_VIEWPORT_OFFSET    0x170
 
 struct ehci_mxc_priv {
         struct clk *usbclk, *ahbclk, *phyclk;
-        struct usb_hcd *hcd;
 };
 
-/* called during probe() after chip reset completes */
-static int ehci_mxc_setup(struct usb_hcd *hcd)
-{
-        hcd->has_tt = 1;
-
-        return ehci_setup(hcd);
-}
+static struct hc_driver __read_mostly ehci_mxc_hc_driver;
 
-static const struct hc_driver ehci_mxc_hc_driver = {
-        .description = hcd_name,
-        .product_desc = "Freescale On-Chip EHCI Host Controller",
-        .hcd_priv_size = sizeof(struct ehci_hcd),
-
-        /*
-         * generic hardware linkage
-         */
-        .irq = ehci_irq,
-        .flags = HCD_USB2 | HCD_MEMORY,
-
-        /*
-         * basic lifecycle operations
-         */
-        .reset = ehci_mxc_setup,
-        .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,
-        .bus_suspend = ehci_bus_suspend,
-        .bus_resume = ehci_bus_resume,
-        .relinquish_port = ehci_relinquish_port,
-        .port_handed_over = ehci_port_handed_over,
-
-        .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+static const struct ehci_driver_overrides ehci_mxc_overrides __initdata = {
+        .extra_priv_size =      sizeof(struct ehci_mxc_priv),
 };
 
 static int ehci_mxc_drv_probe(struct platform_device *pdev)
@@ -112,12 +75,6 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
         if (!hcd)
                 return -ENOMEM;
 
-        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
-        if (!priv) {
-                ret = -ENOMEM;
-                goto err_alloc;
-        }
-
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
                 dev_err(dev, "Found HC with no register addr. Check setup!\n");
@@ -135,6 +92,10 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
                 goto err_alloc;
         }
 
+        hcd->has_tt = 1;
+        ehci = hcd_to_ehci(hcd);
+        priv = (struct ehci_mxc_priv *) ehci->priv;
+
         /* enable clocks */
         priv->usbclk = devm_clk_get(&pdev->dev, "ipg");
         if (IS_ERR(priv->usbclk)) {
@@ -169,8 +130,6 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
                 mdelay(10);
         }
 
-        ehci = hcd_to_ehci(hcd);
-
         /* EHCI registers start at offset 0x100 */
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
@@ -198,8 +157,7 @@ static int ehci_mxc_drv_probe(struct platform_device *pdev)
                 }
         }
 
-        priv->hcd = hcd;
-        platform_set_drvdata(pdev, priv);
+        platform_set_drvdata(pdev, hcd);
 
         ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (ret)
@@ -244,8 +202,11 @@ err_alloc:
 static int __exit ehci_mxc_drv_remove(struct platform_device *pdev)
 {
         struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data;
-        struct ehci_mxc_priv *priv = platform_get_drvdata(pdev);
-        struct usb_hcd *hcd = priv->hcd;
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv;
+
+        usb_remove_hcd(hcd);
 
         if (pdata && pdata->exit)
                 pdata->exit(pdev);
@@ -253,23 +214,20 @@ static int __exit ehci_mxc_drv_remove(struct platform_device *pdev)
         if (pdata->otg)
                 usb_phy_shutdown(pdata->otg);
 
-        usb_remove_hcd(hcd);
-        usb_put_hcd(hcd);
-        platform_set_drvdata(pdev, NULL);
-
         clk_disable_unprepare(priv->usbclk);
         clk_disable_unprepare(priv->ahbclk);
 
         if (priv->phyclk)
                 clk_disable_unprepare(priv->phyclk);
 
+        usb_put_hcd(hcd);
+        platform_set_drvdata(pdev, NULL);
         return 0;
 }
 
 static void ehci_mxc_drv_shutdown(struct platform_device *pdev)
 {
-        struct ehci_mxc_priv *priv = platform_get_drvdata(pdev);
-        struct usb_hcd *hcd = priv->hcd;
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
         if (hcd->driver->shutdown)
                 hcd->driver->shutdown(hcd);
@@ -279,9 +237,31 @@ MODULE_ALIAS("platform:mxc-ehci");
 
 static struct platform_driver ehci_mxc_driver = {
         .probe = ehci_mxc_drv_probe,
-        .remove = __exit_p(ehci_mxc_drv_remove),
+        .remove = ehci_mxc_drv_remove,
         .shutdown = ehci_mxc_drv_shutdown,
         .driver = {
                    .name = "mxc-ehci",
         },
 };
+
+static int __init ehci_mxc_init(void)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        pr_info("%s: " DRIVER_DESC "\n", hcd_name);
+
+        ehci_init_driver(&ehci_mxc_hc_driver, &ehci_mxc_overrides);
+        return platform_driver_register(&ehci_mxc_driver);
+}
+module_init(ehci_mxc_init);
+
+static void __exit ehci_mxc_cleanup(void)
+{
+        platform_driver_unregister(&ehci_mxc_driver);
+}
+module_exit(ehci_mxc_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Sascha Hauer");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 9dadc7118d68..36c3a8210595 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -38,6 +38,10 @@ typedef __u16 __bitwise __hc16;
 #endif
 
 /* statistics can be kept for tuning/monitoring */
+#ifdef DEBUG
+#define EHCI_STATS
+#endif
+
 struct ehci_stats {
         /* irq usage */
         unsigned long           normal;
@@ -221,6 +225,9 @@ struct ehci_hcd {			/* one per controller */
 #ifdef DEBUG
         struct dentry           *debug_dir;
 #endif
+
+        /* platform-specific data -- must come last */
+        unsigned long           priv[0] __aligned(sizeof(s64));
 };
 
 /* convert between an HCD pointer and the corresponding EHCI_HCD */
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 4b9e9aba2665..4f64d24eebc8 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -447,6 +447,10 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
                 return IRQ_NONE;
         uhci_writew(uhci, status, USBSTS);              /* Clear it */
 
+        spin_lock(&uhci->lock);
+        if (unlikely(!uhci->is_initialized))    /* not yet configured */
+                goto done;
+
         if (status & ~(USBSTS_USBINT | USBSTS_ERROR | USBSTS_RD)) {
                 if (status & USBSTS_HSE)
                         dev_err(uhci_dev(uhci), "host system error, "
@@ -455,7 +459,6 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
                         dev_err(uhci_dev(uhci), "host controller process "
                                         "error, something bad happened!\n");
                 if (status & USBSTS_HCH) {
-                        spin_lock(&uhci->lock);
                         if (uhci->rh_state >= UHCI_RH_RUNNING) {
                                 dev_err(uhci_dev(uhci),
                                         "host controller halted, "
@@ -473,15 +476,15 @@ static irqreturn_t uhci_irq(struct usb_hcd *hcd)
                                  * pending unlinks */
                                 mod_timer(&hcd->rh_timer, jiffies);
                         }
-                        spin_unlock(&uhci->lock);
                 }
         }
 
-        if (status & USBSTS_RD)
+        if (status & USBSTS_RD) {
+                spin_unlock(&uhci->lock);
                 usb_hcd_poll_rh_status(hcd);
-        else {
-                spin_lock(&uhci->lock);
+        } else {
                 uhci_scan_schedule(uhci);
+ done:
                 spin_unlock(&uhci->lock);
         }
 
@@ -662,9 +665,9 @@ static int uhci_start(struct usb_hcd *hcd)
          */
         mb();
 
+        spin_lock_irq(&uhci->lock);
         configure_hc(uhci);
         uhci->is_initialized = 1;
-        spin_lock_irq(&uhci->lock);
         start_rh(uhci);
         spin_unlock_irq(&uhci->lock);
         return 0;