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Sourcecode: linux-fsl-imx51 version File versions  Download package

usb_h1.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/clk.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>
#include <mach/arc_otg.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include "usb.h"
#include "iomux.h"


/*
 * USB Host1 HS port
 */
static int gpio_usbh1_active(void)
{
      /* Set USBH1_STP to GPIO and toggle it */
      mxc_request_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_GPIO |
                    IOMUX_CONFIG_SION);
      gpio_request(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), "usbh1_stp");
      gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), 0);
      gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP), 1);

      /* Signal only used on MX51-3DS for reset to PHY.*/
      if (machine_is_mx51_3ds()) {
            mxc_request_iomux(MX51_PIN_EIM_D17, IOMUX_CONFIG_ALT1);
            mxc_iomux_set_pad(MX51_PIN_EIM_D17, PAD_CTL_DRV_HIGH |
                    PAD_CTL_HYS_NONE | PAD_CTL_PUE_KEEPER |
                    PAD_CTL_100K_PU | PAD_CTL_ODE_OPENDRAIN_NONE |
                    PAD_CTL_PKE_ENABLE | PAD_CTL_SRE_FAST);
            gpio_request(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), "eim_d17");
            gpio_direction_output(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), 0);
            gpio_set_value(IOMUX_TO_GPIO(MX51_PIN_EIM_D17), 1);
      }

      msleep(100);

      return 0;
}

void gpio_usbh1_setback_stp(void)
{
      /* setback USBH1_STP to be function */
      mxc_request_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_ALT0);
      mxc_iomux_set_pad(MX51_PIN_USBH1_STP, PAD_CTL_SRE_FAST |
                    PAD_CTL_DRV_HIGH | PAD_CTL_ODE_OPENDRAIN_NONE |
                    PAD_CTL_PUE_KEEPER | PAD_CTL_PKE_ENABLE |
                    PAD_CTL_HYS_ENABLE | PAD_CTL_DDR_INPUT_CMOS |
                    PAD_CTL_DRV_VOT_LOW);
      gpio_free(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP));
}
EXPORT_SYMBOL(gpio_usbh1_setback_stp);

static void gpio_usbh1_inactive(void)
{
      /* Signal only used on MX51-3DS for reset to PHY.*/
      if (machine_is_mx51_3ds()) {
            gpio_free(IOMUX_TO_GPIO(MX51_PIN_EIM_D17));
            mxc_free_iomux(MX51_PIN_EIM_D17, IOMUX_CONFIG_GPIO);
      }

      mxc_free_iomux(MX51_PIN_USBH1_STP, IOMUX_CONFIG_GPIO);
      gpio_free(IOMUX_TO_GPIO(MX51_PIN_USBH1_STP));
}

static void _wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable)
{
      if (enable)
            USBCTRL |= UCTRL_H1WIE;
      else
            USBCTRL &= ~UCTRL_H1WIE;
}

static void usbotg_clock_gate(bool on)
{
      struct clk *usboh3_clk = clk_get(NULL, "usboh3_clk");
      struct clk *usb_ahb_clk = clk_get(NULL, "usb_ahb_clk");

      if (on) {
            clk_enable(usb_ahb_clk);
            clk_enable(usboh3_clk);
      } else {
            clk_disable(usboh3_clk);
            clk_disable(usb_ahb_clk);
      }

      clk_put(usboh3_clk);
      clk_put(usb_ahb_clk);
}

static struct fsl_usb2_platform_data usbh1_config = {
      .name = "Host 1",
      .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_usbh1_active,
      .gpio_usb_inactive = gpio_usbh1_inactive,
      .wake_up_enable = _wake_up_enable,
      .usb_clock_for_pm  = usbotg_clock_gate,
      .transceiver = "isp1504",
};

static struct resource usbh1_resources[] = {
      [0] = {
             .start = (u32) (USB_H1REGS_BASE),
             .end = (u32) (USB_H1REGS_BASE + 0x1ff),
             .flags = IORESOURCE_MEM,
             },
      [1] = {
             .start = MXC_INT_USB_H1,
             .flags = IORESOURCE_IRQ,
             },
};

static int __init usbh1_init(void)
{
      pr_debug("%s: \n", __func__);

      host_pdev_register(usbh1_resources,
                  ARRAY_SIZE(usbh1_resources), &usbh1_config);

      return 0;
}

module_init(usbh1_init);

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