musb_dsps.c

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/*
 * Texas Instruments DSPS platforms "glue layer"
 *
 * Copyright (C) 2012, by Texas Instruments
 *
 * Based on the am35x "glue layer" code.
 *
 * This file is part of the Inventra Controller Driver for Linux.
 *
 * The Inventra Controller Driver for Linux 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.
 *
 * The Inventra Controller Driver for Linux 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 The Inventra Controller Driver for Linux ; if not,
 * write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA  02111-1307  USA
 *
 * musb_dsps.c will be a common file for all the TI DSPS platforms
 * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
 * For now only ti81x is using this and in future davinci.c, am35x.c
 * da8xx.c would be merged to this file after testing.
 */

#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/usb/nop-usb-xceiv.h>

#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_address.h>

#include <plat/usb.h>

#include "musb_core.h"

#ifdef CONFIG_OF
static const struct of_device_id musb_dsps_of_match[];
#endif

static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
    { return __raw_readb(addr + offset); }

static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
    { return __raw_readl(addr + offset); }

static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
    { __raw_writeb(data, addr + offset); }

static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
    { __raw_writel(data, addr + offset); }

struct dsps_musb_wrapper {
    u16 revision;
    u16 control;
    u16 status;
    u16 eoi;
    u16 epintr_set;
    u16 epintr_clear;
    u16 epintr_status;
    u16 coreintr_set;
    u16 coreintr_clear;
    u16 coreintr_status;
    u16 phy_utmi;
    u16 mode;

    /* bit positions for control */
    unsigned    reset:5;

    /* bit positions for interrupt */
    unsigned    usb_shift:5;
    u32     usb_mask;
    u32     usb_bitmap;
    unsigned    drvvbus:5;

    unsigned    txep_shift:5;
    u32     txep_mask;
    u32     txep_bitmap;

    unsigned    rxep_shift:5;
    u32     rxep_mask;
    u32     rxep_bitmap;

    /* bit positions for phy_utmi */
    unsigned    otg_disable:5;

    /* bit positions for mode */
    unsigned    iddig:5;
    /* miscellaneous stuff */
    u32     musb_core_offset;
    u8      poll_seconds;
    /* number of musb instances */
    u8      instances;
};

struct dsps_glue {
    struct device *dev;
    struct platform_device *musb[2];    /* child musb pdev */
    const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
    struct timer_list timer[2]; /* otg_workaround timer */
    unsigned long last_timer[2];    /* last timer data for each instance */
};

static void dsps_musb_enable(struct musb *musb)
{
    struct device *dev = musb->controller;
    struct platform_device *pdev = to_platform_device(dev->parent);
    struct dsps_glue *glue = platform_get_drvdata(pdev);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    void __iomem *reg_base = musb->ctrl_base;
    u32 epmask, coremask;

    /* Workaround: setup IRQs through both register sets. */
    epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
           ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
    coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);

    dsps_writel(reg_base, wrp->epintr_set, epmask);
    dsps_writel(reg_base, wrp->coreintr_set, coremask);
    /* Force the DRVVBUS IRQ so we can start polling for ID change. */
    dsps_writel(reg_base, wrp->coreintr_set,
            (1 << wrp->drvvbus) << wrp->usb_shift);
}

static void dsps_musb_disable(struct musb *musb)
{
    struct device *dev = musb->controller;
    struct platform_device *pdev = to_platform_device(dev->parent);
    struct dsps_glue *glue = platform_get_drvdata(pdev);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    void __iomem *reg_base = musb->ctrl_base;

    dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
    dsps_writel(reg_base, wrp->epintr_clear,
             wrp->txep_bitmap | wrp->rxep_bitmap);
    dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
    dsps_writel(reg_base, wrp->eoi, 0);
}

static void otg_timer(unsigned long _musb)
{
    struct musb *musb = (void *)_musb;
    void __iomem *mregs = musb->mregs;
    struct device *dev = musb->controller;
    struct platform_device *pdev = to_platform_device(dev);
    struct dsps_glue *glue = dev_get_drvdata(dev->parent);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    u8 devctl;
    unsigned long flags;

    /*
     * We poll because DSPS IP's won't expose several OTG-critical
     * status change events (from the transceiver) otherwise.
     */
    devctl = dsps_readb(mregs, MUSB_DEVCTL);
    dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
                otg_state_string(musb->xceiv->state));

    spin_lock_irqsave(&musb->lock, flags);
    switch (musb->xceiv->state) {
    case OTG_STATE_A_WAIT_BCON:
        devctl &= ~MUSB_DEVCTL_SESSION;
        dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);

        devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
        if (devctl & MUSB_DEVCTL_BDEVICE) {
            musb->xceiv->state = OTG_STATE_B_IDLE;
            MUSB_DEV_MODE(musb);
        } else {
            musb->xceiv->state = OTG_STATE_A_IDLE;
            MUSB_HST_MODE(musb);
        }
        break;
    case OTG_STATE_A_WAIT_VFALL:
        musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
        dsps_writel(musb->ctrl_base, wrp->coreintr_set,
                MUSB_INTR_VBUSERROR << wrp->usb_shift);
        break;
    case OTG_STATE_B_IDLE:
        devctl = dsps_readb(mregs, MUSB_DEVCTL);
        if (devctl & MUSB_DEVCTL_BDEVICE)
            mod_timer(&glue->timer[pdev->id],
                    jiffies + wrp->poll_seconds * HZ);
        else
            musb->xceiv->state = OTG_STATE_A_IDLE;
        break;
    default:
        break;
    }
    spin_unlock_irqrestore(&musb->lock, flags);
}

static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
{
    struct device *dev = musb->controller;
    struct platform_device *pdev = to_platform_device(dev);
    struct dsps_glue *glue = dev_get_drvdata(dev->parent);

    if (timeout == 0)
        timeout = jiffies + msecs_to_jiffies(3);

    /* Never idle if active, or when VBUS timeout is not set as host */
    if (musb->is_active || (musb->a_wait_bcon == 0 &&
                musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
        dev_dbg(musb->controller, "%s active, deleting timer\n",
                otg_state_string(musb->xceiv->state));
        del_timer(&glue->timer[pdev->id]);
        glue->last_timer[pdev->id] = jiffies;
        return;
    }

    if (time_after(glue->last_timer[pdev->id], timeout) &&
                timer_pending(&glue->timer[pdev->id])) {
        dev_dbg(musb->controller,
            "Longer idle timer already pending, ignoring...\n");
        return;
    }
    glue->last_timer[pdev->id] = timeout;

    dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
        otg_state_string(musb->xceiv->state),
            jiffies_to_msecs(timeout - jiffies));
    mod_timer(&glue->timer[pdev->id], timeout);
}

static irqreturn_t dsps_interrupt(int irq, void *hci)
{
    struct musb  *musb = hci;
    void __iomem *reg_base = musb->ctrl_base;
    struct device *dev = musb->controller;
    struct platform_device *pdev = to_platform_device(dev);
    struct dsps_glue *glue = dev_get_drvdata(dev->parent);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    unsigned long flags;
    irqreturn_t ret = IRQ_NONE;
    u32 epintr, usbintr;

    spin_lock_irqsave(&musb->lock, flags);

    /* Get endpoint interrupts */
    epintr = dsps_readl(reg_base, wrp->epintr_status);
    musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
    musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;

    if (epintr)
        dsps_writel(reg_base, wrp->epintr_status, epintr);

    /* Get usb core interrupts */
    usbintr = dsps_readl(reg_base, wrp->coreintr_status);
    if (!usbintr && !epintr)
        goto eoi;

    musb->int_usb = (usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
    if (usbintr)
        dsps_writel(reg_base, wrp->coreintr_status, usbintr);

    dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
            usbintr, epintr);
    /*
     * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
     * DSPS IP's missing ID change IRQ.  We need an ID change IRQ to
     * switch appropriately between halves of the OTG state machine.
     * Managing DEVCTL.SESSION per Mentor docs requires that we know its
     * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
     * Also, DRVVBUS pulses for SRP (but not at 5V) ...
     */
    if (usbintr & MUSB_INTR_BABBLE)
        pr_info("CAUTION: musb: Babble Interrupt Occured\n");

    if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
        int drvvbus = dsps_readl(reg_base, wrp->status);
        void __iomem *mregs = musb->mregs;
        u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
        int err;

        err = musb->int_usb & MUSB_INTR_VBUSERROR;
        if (err) {
            /*
             * The Mentor core doesn't debounce VBUS as needed
             * to cope with device connect current spikes. This
             * means it's not uncommon for bus-powered devices
             * to get VBUS errors during enumeration.
             *
             * This is a workaround, but newer RTL from Mentor
             * seems to allow a better one: "re"-starting sessions
             * without waiting for VBUS to stop registering in
             * devctl.
             */
            musb->int_usb &= ~MUSB_INTR_VBUSERROR;
            musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
            mod_timer(&glue->timer[pdev->id],
                    jiffies + wrp->poll_seconds * HZ);
            WARNING("VBUS error workaround (delay coming)\n");
        } else if (drvvbus) {
            musb->is_active = 1;
            MUSB_HST_MODE(musb);
            musb->xceiv->otg->default_a = 1;
            musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
            del_timer(&glue->timer[pdev->id]);
        } else {
            musb->is_active = 0;
            MUSB_DEV_MODE(musb);
            musb->xceiv->otg->default_a = 0;
            musb->xceiv->state = OTG_STATE_B_IDLE;
        }

        /* NOTE: this must complete power-on within 100 ms. */
        dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
                drvvbus ? "on" : "off",
                otg_state_string(musb->xceiv->state),
                err ? " ERROR" : "",
                devctl);
        ret = IRQ_HANDLED;
    }

    if (musb->int_tx || musb->int_rx || musb->int_usb)
        ret |= musb_interrupt(musb);

 eoi:
    /* EOI needs to be written for the IRQ to be re-asserted. */
    if (ret == IRQ_HANDLED || epintr || usbintr)
        dsps_writel(reg_base, wrp->eoi, 1);

    /* Poll for ID change */
    if (musb->xceiv->state == OTG_STATE_B_IDLE)
        mod_timer(&glue->timer[pdev->id],
             jiffies + wrp->poll_seconds * HZ);

    spin_unlock_irqrestore(&musb->lock, flags);

    return ret;
}

static int dsps_musb_init(struct musb *musb)
{
    struct device *dev = musb->controller;
    struct musb_hdrc_platform_data *plat = dev->platform_data;
    struct platform_device *pdev = to_platform_device(dev);
    struct dsps_glue *glue = dev_get_drvdata(dev->parent);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    struct omap_musb_board_data *data = plat->board_data;
    void __iomem *reg_base = musb->ctrl_base;
    u32 rev, val;
    int status;

    /* mentor core register starts at offset of 0x400 from musb base */
    musb->mregs += wrp->musb_core_offset;

    /* Get the NOP PHY */
    musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
    if (IS_ERR_OR_NULL(musb->xceiv))
        return -ENODEV;

    /* Returns zero if e.g. not clocked */
    rev = dsps_readl(reg_base, wrp->revision);
    if (!rev) {
        status = -ENODEV;
        goto err0;
    }

    setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb);

    /* Reset the musb */
    dsps_writel(reg_base, wrp->control, (1 << wrp->reset));

    /* Start the on-chip PHY and its PLL. */
    if (data->set_phy_power)
        data->set_phy_power(1);

    musb->isr = dsps_interrupt;

    /* reset the otgdisable bit, needed for host mode to work */
    val = dsps_readl(reg_base, wrp->phy_utmi);
    val &= ~(1 << wrp->otg_disable);
    dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);

    /* clear level interrupt */
    dsps_writel(reg_base, wrp->eoi, 0);

    return 0;
err0:
    usb_put_phy(musb->xceiv);
    usb_nop_xceiv_unregister();
    return status;
}

static int dsps_musb_exit(struct musb *musb)
{
    struct device *dev = musb->controller;
    struct musb_hdrc_platform_data *plat = dev->platform_data;
    struct omap_musb_board_data *data = plat->board_data;
    struct platform_device *pdev = to_platform_device(dev);
    struct dsps_glue *glue = dev_get_drvdata(dev->parent);

    del_timer_sync(&glue->timer[pdev->id]);

    /* Shutdown the on-chip PHY and its PLL. */
    if (data->set_phy_power)
        data->set_phy_power(0);

    /* NOP driver needs change if supporting dual instance */
    usb_put_phy(musb->xceiv);
    usb_nop_xceiv_unregister();

    return 0;
}

static struct musb_platform_ops dsps_ops = {
    .init       = dsps_musb_init,
    .exit       = dsps_musb_exit,

    .enable     = dsps_musb_enable,
    .disable    = dsps_musb_disable,

    .try_idle   = dsps_musb_try_idle,
};

static u64 musb_dmamask = DMA_BIT_MASK(32);

static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
{
    struct device *dev = glue->dev;
    struct platform_device *pdev = to_platform_device(dev);
    struct musb_hdrc_platform_data  *pdata = dev->platform_data;
    struct device_node *np = pdev->dev.of_node;
    struct musb_hdrc_config *config;
    struct platform_device  *musb;
    struct resource *res;
    struct resource resources[2];
    char res_name[11];
    int ret, musbid;

    /* get memory resource */
    snprintf(res_name, sizeof(res_name), "musb%d", id);
    res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name);
    if (!res) {
        dev_err(dev, "%s get mem resource failed\n", res_name);
        ret = -ENODEV;
        goto err0;
    }
    res->parent = NULL;
    resources[0] = *res;

    /* get irq resource */
    snprintf(res_name, sizeof(res_name), "musb%d-irq", id);
    res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name);
    if (!res) {
        dev_err(dev, "%s get irq resource failed\n", res_name);
        ret = -ENODEV;
        goto err0;
    }
    res->parent = NULL;
    resources[1] = *res;
    resources[1].name = "mc";

    /* get the musb id */
    musbid = musb_get_id(dev, GFP_KERNEL);
    if (musbid < 0) {
        dev_err(dev, "failed to allocate musb id\n");
        ret = -ENOMEM;
        goto err0;
    }
    /* allocate the child platform device */
    musb = platform_device_alloc("musb-hdrc", musbid);
    if (!musb) {
        dev_err(dev, "failed to allocate musb device\n");
        ret = -ENOMEM;
        goto err1;
    }

    musb->id            = musbid;
    musb->dev.parent        = dev;
    musb->dev.dma_mask      = &musb_dmamask;
    musb->dev.coherent_dma_mask = musb_dmamask;

    glue->musb[id]          = musb;

    ret = platform_device_add_resources(musb, resources, 2);
    if (ret) {
        dev_err(dev, "failed to add resources\n");
        goto err2;
    }

    if (np) {
        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
        if (!pdata) {
            dev_err(&pdev->dev,
                "failed to allocate musb platfrom data\n");
            ret = -ENOMEM;
            goto err2;
        }

        config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
        if (!config) {
            dev_err(&pdev->dev,
                "failed to allocate musb hdrc config\n");
            goto err2;
        }

        of_property_read_u32(np, "num-eps", (u32 *)&config->num_eps);
        of_property_read_u32(np, "ram-bits", (u32 *)&config->ram_bits);
        snprintf(res_name, sizeof(res_name), "port%d-mode", id);
        of_property_read_u32(np, res_name, (u32 *)&pdata->mode);
        of_property_read_u32(np, "power", (u32 *)&pdata->power);
        config->multipoint = of_property_read_bool(np, "multipoint");

        pdata->config       = config;
    }

    pdata->platform_ops     = &dsps_ops;

    ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
    if (ret) {
        dev_err(dev, "failed to add platform_data\n");
        goto err2;
    }

    ret = platform_device_add(musb);
    if (ret) {
        dev_err(dev, "failed to register musb device\n");
        goto err2;
    }

    return 0;

err2:
    platform_device_put(musb);
err1:
    musb_put_id(dev, musbid);
err0:
    return ret;
}

static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id)
{
    musb_put_id(glue->dev, glue->musb[id]->id);
    platform_device_del(glue->musb[id]);
    platform_device_put(glue->musb[id]);
}

static int __devinit dsps_probe(struct platform_device *pdev)
{
    struct device_node *np = pdev->dev.of_node;
    const struct of_device_id *match;
    const struct dsps_musb_wrapper *wrp;
    struct dsps_glue *glue;
    struct resource *iomem;
    int ret, i;

    match = of_match_node(musb_dsps_of_match, np);
    if (!match) {
        dev_err(&pdev->dev, "fail to get matching of_match struct\n");
        ret = -EINVAL;
        goto err0;
    }
    wrp = match->data;

    /* allocate glue */
    glue = kzalloc(sizeof(*glue), GFP_KERNEL);
    if (!glue) {
        dev_err(&pdev->dev, "unable to allocate glue memory\n");
        ret = -ENOMEM;
        goto err0;
    }

    /* get memory resource */
    iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    if (!iomem) {
        dev_err(&pdev->dev, "failed to get usbss mem resourse\n");
        ret = -ENODEV;
        goto err1;
    }

    glue->dev = &pdev->dev;

    glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
    if (!glue->wrp) {
        dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
        ret = -ENOMEM;
        goto err1;
    }
    platform_set_drvdata(pdev, glue);

    /* enable the usbss clocks */
    pm_runtime_enable(&pdev->dev);

    ret = pm_runtime_get_sync(&pdev->dev);
    if (ret < 0) {
        dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
        goto err2;
    }

    /* create the child platform device for all instances of musb */
    for (i = 0; i < wrp->instances ; i++) {
        ret = dsps_create_musb_pdev(glue, i);
        if (ret != 0) {
            dev_err(&pdev->dev, "failed to create child pdev\n");
            /* release resources of previously created instances */
            for (i--; i >= 0 ; i--)
                dsps_delete_musb_pdev(glue, i);
            goto err3;
        }
    }

    return 0;

err3:
    pm_runtime_put(&pdev->dev);
err2:
    pm_runtime_disable(&pdev->dev);
    kfree(glue->wrp);
err1:
    kfree(glue);
err0:
    return ret;
}
static int __devexit dsps_remove(struct platform_device *pdev)
{
    struct dsps_glue *glue = platform_get_drvdata(pdev);
    const struct dsps_musb_wrapper *wrp = glue->wrp;
    int i;

    /* delete the child platform device */
    for (i = 0; i < wrp->instances ; i++)
        dsps_delete_musb_pdev(glue, i);

    /* disable usbss clocks */
    pm_runtime_put(&pdev->dev);
    pm_runtime_disable(&pdev->dev);
    kfree(glue->wrp);
    kfree(glue);
    return 0;
}

#ifdef CONFIG_PM_SLEEP
static int dsps_suspend(struct device *dev)
{
    struct musb_hdrc_platform_data *plat = dev->platform_data;
    struct omap_musb_board_data *data = plat->board_data;

    /* Shutdown the on-chip PHY and its PLL. */
    if (data->set_phy_power)
        data->set_phy_power(0);

    return 0;
}

static int dsps_resume(struct device *dev)
{
    struct musb_hdrc_platform_data *plat = dev->platform_data;
    struct omap_musb_board_data *data = plat->board_data;

    /* Start the on-chip PHY and its PLL. */
    if (data->set_phy_power)
        data->set_phy_power(1);

    return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);

static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = {
    .revision       = 0x00,
    .control        = 0x14,
    .status         = 0x18,
    .eoi            = 0x24,
    .epintr_set     = 0x38,
    .epintr_clear       = 0x40,
    .epintr_status      = 0x30,
    .coreintr_set       = 0x3c,
    .coreintr_clear     = 0x44,
    .coreintr_status    = 0x34,
    .phy_utmi       = 0xe0,
    .mode           = 0xe8,
    .reset          = 0,
    .otg_disable        = 21,
    .iddig          = 8,
    .usb_shift      = 0,
    .usb_mask       = 0x1ff,
    .usb_bitmap     = (0x1ff << 0),
    .drvvbus        = 8,
    .txep_shift     = 0,
    .txep_mask      = 0xffff,
    .txep_bitmap        = (0xffff << 0),
    .rxep_shift     = 16,
    .rxep_mask      = 0xfffe,
    .rxep_bitmap        = (0xfffe << 16),
    .musb_core_offset   = 0x400,
    .poll_seconds       = 2,
    .instances      = 2,
};

static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
    {
        .name   = "musb-ti81xx",
        .driver_data    = (kernel_ulong_t) &ti81xx_driver_data,
    },
    {  },   /* Terminating Entry */
};
MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);

#ifdef CONFIG_OF
static const struct of_device_id musb_dsps_of_match[] __devinitconst = {
    { .compatible = "ti,musb-am33xx",
        .data = (void *) &ti81xx_driver_data, },
    {  },
};
MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
#endif

static struct platform_driver dsps_usbss_driver = {
    .probe      = dsps_probe,
    .remove         = __devexit_p(dsps_remove),
    .driver         = {
        .name   = "musb-dsps",
        .pm = &dsps_pm_ops,
        .of_match_table = of_match_ptr(musb_dsps_of_match),
    },
    .id_table   = musb_dsps_id_table,
};

MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
MODULE_AUTHOR("Ravi B <[email protected]>");
MODULE_AUTHOR("Ajay Kumar Gupta <[email protected]>");
MODULE_LICENSE("GPL v2");

static int __init dsps_init(void)
{
    return platform_driver_register(&dsps_usbss_driver);
}
subsys_initcall(dsps_init);

static void __exit dsps_exit(void)
{
    platform_driver_unregister(&dsps_usbss_driver);
}
module_exit(dsps_exit);