ci13xxx_msm.c

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/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/chipidea.h>

#include "ci.h"

#define MSM_USB_BASE    (ci->hw_bank.abs)

static void ci13xxx_msm_notify_event(struct ci13xxx *ci, unsigned event)
{
    struct device *dev = ci->gadget.dev.parent;
    int val;

    switch (event) {
    case CI13XXX_CONTROLLER_RESET_EVENT:
        dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
        writel(0, USB_AHBBURST);
        writel(0, USB_AHBMODE);
        break;
    case CI13XXX_CONTROLLER_STOPPED_EVENT:
        dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");
        /*
         * Put the transceiver in non-driving mode. Otherwise host
         * may not detect soft-disconnection.
         */
        val = usb_phy_io_read(ci->transceiver, ULPI_FUNC_CTRL);
        val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
        val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
        usb_phy_io_write(ci->transceiver, val, ULPI_FUNC_CTRL);
        break;
    default:
        dev_dbg(dev, "unknown ci13xxx event\n");
        break;
    }
}

static struct ci13xxx_platform_data ci13xxx_msm_platdata = {
    .name           = "ci13xxx_msm",
    .flags          = CI13XXX_REGS_SHARED |
                  CI13XXX_REQUIRE_TRANSCEIVER |
                  CI13XXX_PULLUP_ON_VBUS |
                  CI13XXX_DISABLE_STREAMING,

    .notify_event       = ci13xxx_msm_notify_event,
};

static int __devinit ci13xxx_msm_probe(struct platform_device *pdev)
{
    struct platform_device *plat_ci;

    dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");

    plat_ci = ci13xxx_add_device(&pdev->dev,
                pdev->resource, pdev->num_resources,
                &ci13xxx_msm_platdata);
    if (IS_ERR(plat_ci)) {
        dev_err(&pdev->dev, "ci13xxx_add_device failed!\n");
        return PTR_ERR(plat_ci);
    }

    platform_set_drvdata(pdev, plat_ci);

    pm_runtime_no_callbacks(&pdev->dev);
    pm_runtime_enable(&pdev->dev);

    return 0;
}

static int __devexit ci13xxx_msm_remove(struct platform_device *pdev)
{
    struct platform_device *plat_ci = platform_get_drvdata(pdev);

    pm_runtime_disable(&pdev->dev);
    ci13xxx_remove_device(plat_ci);

    return 0;
}

static struct platform_driver ci13xxx_msm_driver = {
    .probe = ci13xxx_msm_probe,
    .remove = __devexit_p(ci13xxx_msm_remove),
    .driver = { .name = "msm_hsusb", },
};

module_platform_driver(ci13xxx_msm_driver);

MODULE_ALIAS("platform:msm_hsusb");
MODULE_LICENSE("GPL v2");