ehci-fsl.c

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/*
 * Copyright 2005-2009 MontaVista Software, Inc.
 * Copyright 2008,2012      Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Ported to 834x by Randy Vinson <[email protected]> using code provided
 * by Hunter Wu.
 * Power Management support by Dave Liu <[email protected]>,
 * Jerry Huang <[email protected]> and
 * Anton Vorontsov <[email protected]>.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>

#include "ehci-fsl.h"

/* configure so an HC device and id are always provided */
/* always called with process context; sleeping is OK */

static int usb_hcd_fsl_probe(const struct hc_driver *driver,
                 struct platform_device *pdev)
{
    struct fsl_usb2_platform_data *pdata;
    struct usb_hcd *hcd;
    struct resource *res;
    int irq;
    int retval;

    pr_debug("initializing FSL-SOC USB Controller\n");

    /* Need platform data for setup */
    pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
    if (!pdata) {
        dev_err(&pdev->dev,
            "No platform data for %s.\n", dev_name(&pdev->dev));
        return -ENODEV;
    }

    /*
     * This is a host mode driver, verify that we're supposed to be
     * in host mode.
     */
    if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
          (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
          (pdata->operating_mode == FSL_USB2_DR_OTG))) {
        dev_err(&pdev->dev,
            "Non Host Mode configured for %s. Wrong driver linked.\n",
            dev_name(&pdev->dev));
        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;

    hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
    if (!hcd) {
        retval = -ENOMEM;
        goto err1;
    }

    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));
        retval = -ENODEV;
        goto err2;
    }
    hcd->rsrc_start = res->start;
    hcd->rsrc_len = resource_size(res);
    if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
                driver->description)) {
        dev_dbg(&pdev->dev, "controller already in use\n");
        retval = -EBUSY;
        goto err2;
    }
    hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);

    if (hcd->regs == NULL) {
        dev_dbg(&pdev->dev, "error mapping memory\n");
        retval = -EFAULT;
        goto err3;
    }

    pdata->regs = hcd->regs;

    if (pdata->power_budget)
        hcd->power_budget = pdata->power_budget;

    /*
     * do platform specific init: check the clock, grab/config pins, etc.
     */
    if (pdata->init && pdata->init(pdev)) {
        retval = -ENODEV;
        goto err4;
    }

    /* Enable USB controller, 83xx or 8536 */
    if (pdata->have_sysif_regs)
        setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);

    /* Don't need to set host mode here. It will be done by tdi_reset() */

    retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
    if (retval != 0)
        goto err4;

#ifdef CONFIG_USB_OTG
    if (pdata->operating_mode == FSL_USB2_DR_OTG) {
        struct ehci_hcd *ehci = hcd_to_ehci(hcd);

        hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
        dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
            hcd, ehci, hcd->phy);

        if (!IS_ERR_OR_NULL(hcd->phy)) {
            retval = otg_set_host(hcd->phy->otg,
                          &ehci_to_hcd(ehci)->self);
            if (retval) {
                usb_put_phy(hcd->phy);
                goto err4;
            }
        } else {
            dev_err(&pdev->dev, "can't find phy\n");
            retval = -ENODEV;
            goto err4;
        }
    }
#endif
    return retval;

      err4:
    iounmap(hcd->regs);
      err3:
    release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
      err2:
    usb_put_hcd(hcd);
      err1:
    dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
    if (pdata->exit)
        pdata->exit(pdev);
    return retval;
}

/* may be called without controller electrically present */
/* may be called with controller, bus, and devices active */

static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
                   struct platform_device *pdev)
{
    struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;

    if (!IS_ERR_OR_NULL(hcd->phy)) {
        otg_set_host(hcd->phy->otg, NULL);
        usb_put_phy(hcd->phy);
    }

    usb_remove_hcd(hcd);

    /*
     * do platform specific un-initialization:
     * release iomux pins, disable clock, etc.
     */
    if (pdata->exit)
        pdata->exit(pdev);
    iounmap(hcd->regs);
    release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
    usb_put_hcd(hcd);
}

static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
                   enum fsl_usb2_phy_modes phy_mode,
                   unsigned int port_offset)
{
    u32 portsc;
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);
    void __iomem *non_ehci = hcd->regs;
    struct device *dev = hcd->self.controller;
    struct fsl_usb2_platform_data *pdata = dev->platform_data;

    if (pdata->controller_ver < 0) {
        dev_warn(hcd->self.controller, "Could not get controller version\n");
        return -ENODEV;
    }

    portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
    portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);

    switch (phy_mode) {
    case FSL_USB2_PHY_ULPI:
        if (pdata->controller_ver) {
            /* controller version 1.6 or above */
            setbits32(non_ehci + FSL_SOC_USB_CTRL,
                    ULPI_PHY_CLK_SEL);
            /*
             * Due to controller issue of PHY_CLK_VALID in ULPI
             * mode, we set USB_CTRL_USB_EN before checking
             * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
             */
            clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
                    UTMI_PHY_EN, USB_CTRL_USB_EN);
        }
        portsc |= PORT_PTS_ULPI;
        break;
    case FSL_USB2_PHY_SERIAL:
        portsc |= PORT_PTS_SERIAL;
        break;
    case FSL_USB2_PHY_UTMI_WIDE:
        portsc |= PORT_PTS_PTW;
        /* fall through */
    case FSL_USB2_PHY_UTMI:
        if (pdata->controller_ver) {
            /* controller version 1.6 or above */
            setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
            mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
                        become stable - 10ms*/
        }
        /* enable UTMI PHY */
        if (pdata->have_sysif_regs)
            setbits32(non_ehci + FSL_SOC_USB_CTRL,
                  CTRL_UTMI_PHY_EN);
        portsc |= PORT_PTS_UTMI;
        break;
    case FSL_USB2_PHY_NONE:
        break;
    }

    if (pdata->controller_ver && (phy_mode == FSL_USB2_PHY_ULPI)) {
        /* check PHY_CLK_VALID to get phy clk valid */
        if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
                PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
            printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
            return -EINVAL;
        }
    }

    ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);

    if (phy_mode != FSL_USB2_PHY_ULPI)
        setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);

    return 0;
}

static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
{
    struct usb_hcd *hcd = ehci_to_hcd(ehci);
    struct fsl_usb2_platform_data *pdata;
    void __iomem *non_ehci = hcd->regs;

    pdata = hcd->self.controller->platform_data;

    if (pdata->have_sysif_regs) {
        /*
        * Turn on cache snooping hardware, since some PowerPC platforms
        * wholly rely on hardware to deal with cache coherent
        */

        /* Setup Snooping for all the 4GB space */
        /* SNOOP1 starts from 0x0, size 2G */
        out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
        /* SNOOP2 starts from 0x80000000, size 2G */
        out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
    }

    if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
            (pdata->operating_mode == FSL_USB2_DR_OTG))
        if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
            return -EINVAL;

    if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
        unsigned int chip, rev, svr;

        svr = mfspr(SPRN_SVR);
        chip = svr >> 16;
        rev = (svr >> 4) & 0xf;

        /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
        if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
            ehci->has_fsl_port_bug = 1;

        if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
            if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
                return -EINVAL;

        if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
            if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
                return -EINVAL;
    }

    if (pdata->have_sysif_regs) {
#ifdef CONFIG_FSL_SOC_BOOKE
        out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
        out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
#else
        out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
        out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
#endif
        out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
    }

    return 0;
}

/* called after powerup, by probe or system-pm "wakeup" */
static int ehci_fsl_reinit(struct ehci_hcd *ehci)
{
    if (ehci_fsl_usb_setup(ehci))
        return -EINVAL;
    ehci_port_power(ehci, 0);

    return 0;
}

/* called during probe() after chip reset completes */
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;

    /* EHCI registers start at offset 0x100 */
    ehci->caps = hcd->regs + 0x100;

    hcd->has_tt = 1;

    retval = ehci_setup(hcd);
    if (retval)
        return retval;

    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;
}

struct ehci_fsl {
    struct ehci_hcd ehci;

#ifdef CONFIG_PM
    /* Saved USB PHY settings, need to restore after deep sleep. */
    u32 usb_ctrl;
#endif
};

#ifdef CONFIG_PM

#ifdef CONFIG_PPC_MPC512x
static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
{
    struct usb_hcd *hcd = dev_get_drvdata(dev);
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);
    struct fsl_usb2_platform_data *pdata = dev->platform_data;
    u32 tmp;

#ifdef DEBUG
    u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
    mode &= USBMODE_CM_MASK;
    tmp = ehci_readl(ehci, hcd->regs + 0x140);  /* usbcmd */

    dev_dbg(dev, "suspend=%d already_suspended=%d "
        "mode=%d  usbcmd %08x\n", pdata->suspended,
        pdata->already_suspended, mode, tmp);
#endif

    /*
     * If the controller is already suspended, then this must be a
     * PM suspend.  Remember this fact, so that we will leave the
     * controller suspended at PM resume time.
     */
    if (pdata->suspended) {
        dev_dbg(dev, "already suspended, leaving early\n");
        pdata->already_suspended = 1;
        return 0;
    }

    dev_dbg(dev, "suspending...\n");

    ehci->rh_state = EHCI_RH_SUSPENDED;
    dev->power.power_state = PMSG_SUSPEND;

    /* ignore non-host interrupts */
    clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);

    /* stop the controller */
    tmp = ehci_readl(ehci, &ehci->regs->command);
    tmp &= ~CMD_RUN;
    ehci_writel(ehci, tmp, &ehci->regs->command);

    /* save EHCI registers */
    pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
    pdata->pm_command &= ~CMD_RUN;
    pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
    pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
    pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
    pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
    pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
    pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
    pdata->pm_configured_flag  =
        ehci_readl(ehci, &ehci->regs->configured_flag);
    pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
    pdata->pm_usbgenctrl = ehci_readl(ehci,
                      hcd->regs + FSL_SOC_USB_USBGENCTRL);

    /* clear the W1C bits */
    pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);

    pdata->suspended = 1;

    /* clear PP to cut power to the port */
    tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
    tmp &= ~PORT_POWER;
    ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);

    return 0;
}

static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
{
    struct usb_hcd *hcd = dev_get_drvdata(dev);
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);
    struct fsl_usb2_platform_data *pdata = dev->platform_data;
    u32 tmp;

    dev_dbg(dev, "suspend=%d already_suspended=%d\n",
        pdata->suspended, pdata->already_suspended);

    /*
     * If the controller was already suspended at suspend time,
     * then don't resume it now.
     */
    if (pdata->already_suspended) {
        dev_dbg(dev, "already suspended, leaving early\n");
        pdata->already_suspended = 0;
        return 0;
    }

    if (!pdata->suspended) {
        dev_dbg(dev, "not suspended, leaving early\n");
        return 0;
    }

    pdata->suspended = 0;

    dev_dbg(dev, "resuming...\n");

    /* set host mode */
    tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
    ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);

    ehci_writel(ehci, pdata->pm_usbgenctrl,
            hcd->regs + FSL_SOC_USB_USBGENCTRL);
    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);
    ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
    ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
    ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
    ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
    ehci_writel(ehci, pdata->pm_configured_flag,
            &ehci->regs->configured_flag);
    ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);

    set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
    ehci->rh_state = EHCI_RH_RUNNING;
    dev->power.power_state = PMSG_ON;

    tmp = ehci_readl(ehci, &ehci->regs->command);
    tmp |= CMD_RUN;
    ehci_writel(ehci, tmp, &ehci->regs->command);

    usb_hcd_resume_root_hub(hcd);

    return 0;
}
#else
static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
{
    return 0;
}

static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
{
    return 0;
}
#endif /* CONFIG_PPC_MPC512x */

static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
{
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);

    return container_of(ehci, struct ehci_fsl, ehci);
}

static int ehci_fsl_drv_suspend(struct device *dev)
{
    struct usb_hcd *hcd = dev_get_drvdata(dev);
    struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
    void __iomem *non_ehci = hcd->regs;

    if (of_device_is_compatible(dev->parent->of_node,
                    "fsl,mpc5121-usb2-dr")) {
        return ehci_fsl_mpc512x_drv_suspend(dev);
    }

    ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
            device_may_wakeup(dev));
    if (!fsl_deep_sleep())
        return 0;

    ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
    return 0;
}

static int ehci_fsl_drv_resume(struct device *dev)
{
    struct usb_hcd *hcd = dev_get_drvdata(dev);
    struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);
    void __iomem *non_ehci = hcd->regs;

    if (of_device_is_compatible(dev->parent->of_node,
                    "fsl,mpc5121-usb2-dr")) {
        return ehci_fsl_mpc512x_drv_resume(dev);
    }

    ehci_prepare_ports_for_controller_resume(ehci);
    if (!fsl_deep_sleep())
        return 0;

    usb_root_hub_lost_power(hcd->self.root_hub);

    /* Restore USB PHY settings and enable the controller. */
    out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);

    ehci_reset(ehci);
    ehci_fsl_reinit(ehci);

    return 0;
}

static int ehci_fsl_drv_restore(struct device *dev)
{
    struct usb_hcd *hcd = dev_get_drvdata(dev);

    usb_root_hub_lost_power(hcd->self.root_hub);
    return 0;
}

static struct dev_pm_ops ehci_fsl_pm_ops = {
    .suspend = ehci_fsl_drv_suspend,
    .resume = ehci_fsl_drv_resume,
    .restore = ehci_fsl_drv_restore,
};

#define EHCI_FSL_PM_OPS     (&ehci_fsl_pm_ops)
#else
#define EHCI_FSL_PM_OPS     NULL
#endif /* CONFIG_PM */

#ifdef CONFIG_USB_OTG
static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
{
    struct ehci_hcd *ehci = hcd_to_ehci(hcd);
    u32 status;

    if (!port)
        return -EINVAL;

    port--;

    /* start port reset before HNP protocol time out */
    status = readl(&ehci->regs->port_status[port]);
    if (!(status & PORT_CONNECT))
        return -ENODEV;

    /* khubd will finish the reset later */
    if (ehci_is_TDI(ehci)) {
        writel(PORT_RESET |
               (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
               &ehci->regs->port_status[port]);
    } else {
        writel(PORT_RESET, &ehci->regs->port_status[port]);
    }

    return 0;
}
#else
#define ehci_start_port_reset   NULL
#endif /* CONFIG_USB_OTG */


static const struct hc_driver ehci_fsl_hc_driver = {
    .description = hcd_name,
    .product_desc = "Freescale On-Chip EHCI Host Controller",
    .hcd_priv_size = sizeof(struct ehci_fsl),

    /*
     * generic hardware linkage
     */
    .irq = ehci_irq,
    .flags = HCD_USB2 | HCD_MEMORY,

    /*
     * basic lifecycle operations
     */
    .reset = ehci_fsl_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,
    .start_port_reset = ehci_start_port_reset,
    .relinquish_port = ehci_relinquish_port,
    .port_handed_over = ehci_port_handed_over,

    .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
};

static int ehci_fsl_drv_probe(struct platform_device *pdev)
{
    if (usb_disabled())
        return -ENODEV;

    /* FIXME we only want one one probe() not two */
    return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
}

static int ehci_fsl_drv_remove(struct platform_device *pdev)
{
    struct usb_hcd *hcd = platform_get_drvdata(pdev);

    /* FIXME we only want one one remove() not two */
    usb_hcd_fsl_remove(hcd, pdev);
    return 0;
}

MODULE_ALIAS("platform:fsl-ehci");

static struct platform_driver ehci_fsl_driver = {
    .probe = ehci_fsl_drv_probe,
    .remove = ehci_fsl_drv_remove,
    .shutdown = usb_hcd_platform_shutdown,
    .driver = {
        .name = "fsl-ehci",
        .pm = EHCI_FSL_PM_OPS,
    },
};