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usb_h2.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/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <mach/arc_otg.h>
#include "usb.h"
#include "iomux.h"

/*
 * USB Host2 HS port
 */
static int gpio_usbh2_active(void)
{
      /* Set USBH2_STP to GPIO and toggle it */
      mxc_request_iomux(MX51_PIN_EIM_A26, IOMUX_CONFIG_GPIO);
      mxc_set_gpio_direction(MX51_PIN_EIM_A26, 0);
      mxc_set_gpio_dataout(MX51_PIN_EIM_A26, 1);

      msleep(100);

      return 0;
}

void gpio_usbh2_setback_stp(void)
{
      /* setback USBH2_STP to be function */
      mxc_request_iomux(MX51_PIN_EIM_A26, IOMUX_CONFIG_ALT2);
}
EXPORT_SYMBOL(gpio_usbh2_setback_stp);

static void gpio_usbh2_inactive(void)
{
      mxc_request_gpio(MX51_PIN_EIM_A26);
      mxc_free_iomux(MX51_PIN_EIM_A26, IOMUX_CONFIG_GPIO);
}

static struct fsl_usb2_platform_data usbh2_config = {
      .name = "Host 2",
      .platform_init = fsl_usb_host_init,
      .platform_uninit = fsl_usb_host_uninit,
      .operating_mode = FSL_USB2_MPH_HOST,
      .phy_mode = FSL_USB2_PHY_ULPI,
      .power_budget = 500,    /* 500 mA max power */
      .gpio_usb_active = gpio_usbh2_active,
      .gpio_usb_inactive = gpio_usbh2_inactive,
      .transceiver = "isp1504",
};

static struct resource usbh2_resources[] = {
      [0] = {
             .start = (u32) (USB_H2REGS_BASE),
             .end = (u32) (USB_H2REGS_BASE + 0x1ff),
             .flags = IORESOURCE_MEM,
             },
      [1] = {
             .start = MXC_INT_USB_H2,
             .flags = IORESOURCE_IRQ,
             },
};

static int __init usbh2_init(void)
{
      pr_debug("%s: \n", __func__);

      host_pdev_register(usbh2_resources, ARRAY_SIZE(usbh2_resources),
                     &usbh2_config);
      return 0;
}

module_init(usbh2_init);


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