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utmixc.c

/*
 * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <linux/usb/fsl_xcvr.h>
#include <linux/pmic_external.h>

#include <mach/hardware.h>
#include <mach/arc_otg.h>
#include <asm/mach-types.h>

static void usb_utmi_init(struct fsl_xcvr_ops *this)
{
}

static void usb_utmi_uninit(struct fsl_xcvr_ops *this)
{
}

/*!
 * set vbus power
 *
 * @param       view  viewport register
 * @param       on    power on or off
 */
static void set_power(struct fsl_xcvr_ops *this,
                  struct fsl_usb2_platform_data *pdata, int on)
{
      struct device *dev = &pdata->pdev->dev;
      struct regulator *usbotg_regux;

      pr_debug("real %s(on=%d) pdata=0x%p\n", __func__, on, pdata);
      if (machine_is_mx37_3ds()) {
            if (!board_is_mx37(BOARD_REV_2))
                  usbotg_regux = regulator_get(dev, "DCDC2");
            else
                  usbotg_regux = regulator_get(dev, "SWBST");
            if (on) {
                  regulator_enable(usbotg_regux);
            } else {
                  regulator_disable(usbotg_regux);
            }
#if defined(CONFIG_MXC_PMIC_MC13892_MODULE) || defined(CONFIG_MXC_PMIC_MC13892)
      } else if (machine_is_mx51_3ds()) {
            unsigned int value;

            usbotg_regux = regulator_get(dev, "SWBST");
            if (on)
                  regulator_enable(usbotg_regux);
            else
                  regulator_disable(usbotg_regux);

            /* VUSBIN */
            pmic_read_reg(REG_USB1, &value, 0xffffff);
            if (on)
                  value |= 0x1;
            else
                  value &= ~0x1;
            pmic_write_reg(REG_USB1, value, 0xffffff);

            /* VUSBEN */
            usbotg_regux = regulator_get(dev, "VUSB");
            if (on)
                  regulator_enable(usbotg_regux);
            else
                  regulator_disable(usbotg_regux);
#endif
      }
}

static struct fsl_xcvr_ops utmi_ops = {
      .name = "utmi",
      .xcvr_type = PORTSC_PTS_UTMI,
      .init = usb_utmi_init,
      .uninit = usb_utmi_uninit,
      .set_vbus_power = set_power,
};

extern void fsl_usb_xcvr_register(struct fsl_xcvr_ops *xcvr_ops);

static int __init utmixc_init(void)
{
      fsl_usb_xcvr_register(&utmi_ops);
      return 0;
}

extern void fsl_usb_xcvr_unregister(struct fsl_xcvr_ops *xcvr_ops);

static void __exit utmixc_exit(void)
{
      fsl_usb_xcvr_unregister(&utmi_ops);
}

module_init(utmixc_init);
module_exit(utmixc_exit);

MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("utmi xcvr driver");
MODULE_LICENSE("GPL");

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