mach-mx31_3ds.c

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/*
 *  Copyright 2008 Freescale Semiconductor, Inc. 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 as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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.
 */

#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/mfd/mc13783.h>
#include <linux/spi/spi.h>
#include <linux/spi/l4f00242t03.h>
#include <linux/regulator/machine.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
#include <linux/memblock.h>

#include <media/soc_camera.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/memory.h>
#include <asm/mach/map.h>
#include <asm/memblock.h>
#include <mach/common.h>
#include <mach/iomux-mx3.h>
#include <mach/3ds_debugboard.h>
#include <mach/ulpi.h>

#include "devices-imx31.h"

static int mx31_3ds_pins[] = {
    /* UART1 */
    MX31_PIN_CTS1__CTS1,
    MX31_PIN_RTS1__RTS1,
    MX31_PIN_TXD1__TXD1,
    MX31_PIN_RXD1__RXD1,
    IOMUX_MODE(MX31_PIN_GPIO1_1, IOMUX_CONFIG_GPIO),
    /*SPI0*/
    IOMUX_MODE(MX31_PIN_DSR_DCE1, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_RI_DCE1, IOMUX_CONFIG_ALT1),
    /* SPI 1 */
    MX31_PIN_CSPI2_SCLK__SCLK,
    MX31_PIN_CSPI2_MOSI__MOSI,
    MX31_PIN_CSPI2_MISO__MISO,
    MX31_PIN_CSPI2_SPI_RDY__SPI_RDY,
    MX31_PIN_CSPI2_SS0__SS0,
    MX31_PIN_CSPI2_SS2__SS2, /*CS for MC13783 */
    /* MC13783 IRQ */
    IOMUX_MODE(MX31_PIN_GPIO1_3, IOMUX_CONFIG_GPIO),
    /* USB OTG reset */
    IOMUX_MODE(MX31_PIN_USB_PWR, IOMUX_CONFIG_GPIO),
    /* USB OTG */
    MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
    MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
    MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
    MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
    MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
    MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
    MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
    MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
    MX31_PIN_USBOTG_CLK__USBOTG_CLK,
    MX31_PIN_USBOTG_DIR__USBOTG_DIR,
    MX31_PIN_USBOTG_NXT__USBOTG_NXT,
    MX31_PIN_USBOTG_STP__USBOTG_STP,
    /*Keyboard*/
    MX31_PIN_KEY_ROW0_KEY_ROW0,
    MX31_PIN_KEY_ROW1_KEY_ROW1,
    MX31_PIN_KEY_ROW2_KEY_ROW2,
    MX31_PIN_KEY_COL0_KEY_COL0,
    MX31_PIN_KEY_COL1_KEY_COL1,
    MX31_PIN_KEY_COL2_KEY_COL2,
    MX31_PIN_KEY_COL3_KEY_COL3,
    /* USB Host 2 */
    IOMUX_MODE(MX31_PIN_USBH2_CLK, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_USBH2_DIR, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_USBH2_NXT, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_USBH2_STP, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_USBH2_DATA0, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_USBH2_DATA1, IOMUX_CONFIG_FUNC),
    IOMUX_MODE(MX31_PIN_PC_VS2, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_PC_BVD1, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_PC_BVD2, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_PC_RST, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_IOIS16, IOMUX_CONFIG_ALT1),
    IOMUX_MODE(MX31_PIN_PC_RW_B, IOMUX_CONFIG_ALT1),
    /* USB Host2 reset */
    IOMUX_MODE(MX31_PIN_USB_BYP, IOMUX_CONFIG_GPIO),
    /* I2C1 */
    MX31_PIN_I2C_CLK__I2C1_SCL,
    MX31_PIN_I2C_DAT__I2C1_SDA,
    /* SDHC1 */
    MX31_PIN_SD1_DATA3__SD1_DATA3,
    MX31_PIN_SD1_DATA2__SD1_DATA2,
    MX31_PIN_SD1_DATA1__SD1_DATA1,
    MX31_PIN_SD1_DATA0__SD1_DATA0,
    MX31_PIN_SD1_CLK__SD1_CLK,
    MX31_PIN_SD1_CMD__SD1_CMD,
    MX31_PIN_GPIO3_1__GPIO3_1, /* Card detect */
    MX31_PIN_GPIO3_0__GPIO3_0, /* OE */
    /* Framebuffer */
    MX31_PIN_LD0__LD0,
    MX31_PIN_LD1__LD1,
    MX31_PIN_LD2__LD2,
    MX31_PIN_LD3__LD3,
    MX31_PIN_LD4__LD4,
    MX31_PIN_LD5__LD5,
    MX31_PIN_LD6__LD6,
    MX31_PIN_LD7__LD7,
    MX31_PIN_LD8__LD8,
    MX31_PIN_LD9__LD9,
    MX31_PIN_LD10__LD10,
    MX31_PIN_LD11__LD11,
    MX31_PIN_LD12__LD12,
    MX31_PIN_LD13__LD13,
    MX31_PIN_LD14__LD14,
    MX31_PIN_LD15__LD15,
    MX31_PIN_LD16__LD16,
    MX31_PIN_LD17__LD17,
    MX31_PIN_VSYNC3__VSYNC3,
    MX31_PIN_HSYNC__HSYNC,
    MX31_PIN_FPSHIFT__FPSHIFT,
    MX31_PIN_CONTRAST__CONTRAST,
    /* CSI */
    MX31_PIN_CSI_D6__CSI_D6,
    MX31_PIN_CSI_D7__CSI_D7,
    MX31_PIN_CSI_D8__CSI_D8,
    MX31_PIN_CSI_D9__CSI_D9,
    MX31_PIN_CSI_D10__CSI_D10,
    MX31_PIN_CSI_D11__CSI_D11,
    MX31_PIN_CSI_D12__CSI_D12,
    MX31_PIN_CSI_D13__CSI_D13,
    MX31_PIN_CSI_D14__CSI_D14,
    MX31_PIN_CSI_D15__CSI_D15,
    MX31_PIN_CSI_HSYNC__CSI_HSYNC,
    MX31_PIN_CSI_MCLK__CSI_MCLK,
    MX31_PIN_CSI_PIXCLK__CSI_PIXCLK,
    MX31_PIN_CSI_VSYNC__CSI_VSYNC,
    MX31_PIN_CSI_D5__GPIO3_5, /* CMOS PWDN */
    IOMUX_MODE(MX31_PIN_RI_DTE1, IOMUX_CONFIG_GPIO), /* CMOS reset */
    /* SSI */
    MX31_PIN_STXD4__STXD4,
    MX31_PIN_SRXD4__SRXD4,
    MX31_PIN_SCK4__SCK4,
    MX31_PIN_SFS4__SFS4,
};

/*
 * Camera support
 */
static phys_addr_t mx3_camera_base __initdata;
#define MX31_3DS_CAMERA_BUF_SIZE SZ_8M

#define MX31_3DS_GPIO_CAMERA_PW IOMUX_TO_GPIO(MX31_PIN_CSI_D5)
#define MX31_3DS_GPIO_CAMERA_RST IOMUX_TO_GPIO(MX31_PIN_RI_DTE1)

static struct gpio mx31_3ds_camera_gpios[] = {
    { MX31_3DS_GPIO_CAMERA_PW, GPIOF_OUT_INIT_HIGH, "camera-power" },
    { MX31_3DS_GPIO_CAMERA_RST, GPIOF_OUT_INIT_HIGH, "camera-reset" },
};

static const struct mx3_camera_pdata mx31_3ds_camera_pdata __initconst = {
    .flags = MX3_CAMERA_DATAWIDTH_10,
    .mclk_10khz = 2600,
};

static int __init mx31_3ds_init_camera(void)
{
    int dma, ret = -ENOMEM;
    struct platform_device *pdev =
        imx31_alloc_mx3_camera(&mx31_3ds_camera_pdata);

    if (IS_ERR(pdev))
        return PTR_ERR(pdev);

    if (!mx3_camera_base)
        goto err;

    dma = dma_declare_coherent_memory(&pdev->dev,
                    mx3_camera_base, mx3_camera_base,
                    MX31_3DS_CAMERA_BUF_SIZE,
                    DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);

    if (!(dma & DMA_MEMORY_MAP))
        goto err;

    ret = platform_device_add(pdev);
    if (ret)
err:
        platform_device_put(pdev);

    return ret;
}

static int mx31_3ds_camera_power(struct device *dev, int on)
{
    /* enable or disable the camera */
    pr_debug("%s: %s the camera\n", __func__, on ? "ENABLE" : "DISABLE");
    gpio_set_value(MX31_3DS_GPIO_CAMERA_PW, on ? 0 : 1);

    if (!on)
        goto out;

    /* If enabled, give a reset impulse */
    gpio_set_value(MX31_3DS_GPIO_CAMERA_RST, 0);
    msleep(20);
    gpio_set_value(MX31_3DS_GPIO_CAMERA_RST, 1);
    msleep(100);

out:
    return 0;
}

static struct i2c_board_info mx31_3ds_i2c_camera = {
    I2C_BOARD_INFO("ov2640", 0x30),
};

static struct regulator_bulk_data mx31_3ds_camera_regs[] = {
    { .supply = "cmos_vcore" },
    { .supply = "cmos_2v8" },
};

static struct soc_camera_link iclink_ov2640 = {
    .bus_id     = 0,
    .board_info = &mx31_3ds_i2c_camera,
    .i2c_adapter_id = 0,
    .power      = mx31_3ds_camera_power,
    .regulators = mx31_3ds_camera_regs,
    .num_regulators = ARRAY_SIZE(mx31_3ds_camera_regs),
};

static struct platform_device mx31_3ds_ov2640 = {
    .name   = "soc-camera-pdrv",
    .id = 0,
    .dev    = {
        .platform_data = &iclink_ov2640,
    },
};

/*
 * FB support
 */
static const struct fb_videomode fb_modedb[] = {
    {   /* 480x640 @ 60 Hz */
        .name       = "Epson-VGA",
        .refresh    = 60,
        .xres       = 480,
        .yres       = 640,
        .pixclock   = 41701,
        .left_margin    = 20,
        .right_margin   = 41,
        .upper_margin   = 10,
        .lower_margin   = 5,
        .hsync_len  = 20,
        .vsync_len  = 10,
        .sync       = FB_SYNC_OE_ACT_HIGH | FB_SYNC_CLK_INVERT,
        .vmode      = FB_VMODE_NONINTERLACED,
        .flag       = 0,
    },
};

static struct mx3fb_platform_data mx3fb_pdata __initdata = {
    .name       = "Epson-VGA",
    .mode       = fb_modedb,
    .num_modes  = ARRAY_SIZE(fb_modedb),
};

/* LCD */
static struct l4f00242t03_pdata mx31_3ds_l4f00242t03_pdata = {
    .reset_gpio     = IOMUX_TO_GPIO(MX31_PIN_LCS1),
    .data_enable_gpio   = IOMUX_TO_GPIO(MX31_PIN_SER_RS),
};

/*
 * Support for SD card slot in personality board
 */
#define MX31_3DS_GPIO_SDHC1_CD IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
#define MX31_3DS_GPIO_SDHC1_BE IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)

static struct gpio mx31_3ds_sdhc1_gpios[] = {
    { MX31_3DS_GPIO_SDHC1_CD, GPIOF_IN, "sdhc1-card-detect" },
    { MX31_3DS_GPIO_SDHC1_BE, GPIOF_OUT_INIT_LOW, "sdhc1-bus-en" },
};

static int mx31_3ds_sdhc1_init(struct device *dev,
                   irq_handler_t detect_irq,
                   void *data)
{
    int ret;

    ret = gpio_request_array(mx31_3ds_sdhc1_gpios,
                 ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
    if (ret) {
        pr_warning("Unable to request the SD/MMC GPIOs.\n");
        return ret;
    }

    ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)),
              detect_irq, IRQF_DISABLED |
              IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
              "sdhc1-detect", data);
    if (ret) {
        pr_warning("Unable to request the SD/MMC card-detect IRQ.\n");
        goto gpio_free;
    }

    return 0;

gpio_free:
    gpio_free_array(mx31_3ds_sdhc1_gpios,
            ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
    return ret;
}

static void mx31_3ds_sdhc1_exit(struct device *dev, void *data)
{
    free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)), data);
    gpio_free_array(mx31_3ds_sdhc1_gpios,
             ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
}

static void mx31_3ds_sdhc1_setpower(struct device *dev, unsigned int vdd)
{
    /*
     * While the voltage stuff is done by the driver, activate the
     * Buffer Enable Pin only if there is a card in slot to fix the card
     * voltage issue caused by bi-directional chip TXB0108 on 3Stack.
     * Done here because at this stage we have for sure a debounced value
     * of the presence of the card, showed by the value of vdd.
     * 7 == ilog2(MMC_VDD_165_195)
     */
    if (vdd > 7)
        gpio_set_value(MX31_3DS_GPIO_SDHC1_BE, 1);
    else
        gpio_set_value(MX31_3DS_GPIO_SDHC1_BE, 0);
}

static struct imxmmc_platform_data sdhc1_pdata = {
    .init       = mx31_3ds_sdhc1_init,
    .exit       = mx31_3ds_sdhc1_exit,
    .setpower   = mx31_3ds_sdhc1_setpower,
};

/*
 * Matrix keyboard
 */

static const uint32_t mx31_3ds_keymap[] = {
    KEY(0, 0, KEY_UP),
    KEY(0, 1, KEY_DOWN),
    KEY(1, 0, KEY_RIGHT),
    KEY(1, 1, KEY_LEFT),
    KEY(1, 2, KEY_ENTER),
    KEY(2, 0, KEY_F6),
    KEY(2, 1, KEY_F8),
    KEY(2, 2, KEY_F9),
    KEY(2, 3, KEY_F10),
};

static const struct matrix_keymap_data mx31_3ds_keymap_data __initconst = {
    .keymap     = mx31_3ds_keymap,
    .keymap_size    = ARRAY_SIZE(mx31_3ds_keymap),
};

/* Regulators */
static struct regulator_init_data pwgtx_init = {
    .constraints = {
        .boot_on    = 1,
        .always_on  = 1,
    },
};

static struct regulator_init_data gpo_init = {
    .constraints = {
        .boot_on = 1,
        .always_on = 1,
    }
};

static struct regulator_consumer_supply vmmc2_consumers[] = {
    REGULATOR_SUPPLY("vmmc", "mxc-mmc.0"),
};

static struct regulator_init_data vmmc2_init = {
    .constraints = {
        .min_uV = 3000000,
        .max_uV = 3000000,
        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_STATUS,
    },
    .num_consumer_supplies = ARRAY_SIZE(vmmc2_consumers),
    .consumer_supplies = vmmc2_consumers,
};

static struct regulator_consumer_supply vmmc1_consumers[] = {
    REGULATOR_SUPPLY("vcore", "spi0.0"),
    REGULATOR_SUPPLY("cmos_2v8", "soc-camera-pdrv.0"),
};

static struct regulator_init_data vmmc1_init = {
    .constraints = {
        .min_uV = 2800000,
        .max_uV = 2800000,
        .apply_uV = 1,
        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_STATUS,
    },
    .num_consumer_supplies = ARRAY_SIZE(vmmc1_consumers),
    .consumer_supplies = vmmc1_consumers,
};

static struct regulator_consumer_supply vgen_consumers[] = {
    REGULATOR_SUPPLY("vdd", "spi0.0"),
};

static struct regulator_init_data vgen_init = {
    .constraints = {
        .min_uV = 1800000,
        .max_uV = 1800000,
        .apply_uV = 1,
        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_STATUS,
    },
    .num_consumer_supplies = ARRAY_SIZE(vgen_consumers),
    .consumer_supplies = vgen_consumers,
};

static struct regulator_consumer_supply vvib_consumers[] = {
    REGULATOR_SUPPLY("cmos_vcore", "soc-camera-pdrv.0"),
};

static struct regulator_init_data vvib_init = {
    .constraints = {
        .min_uV = 1300000,
        .max_uV = 1300000,
        .apply_uV = 1,
        .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_STATUS,
    },
    .num_consumer_supplies = ARRAY_SIZE(vvib_consumers),
    .consumer_supplies = vvib_consumers,
};

static struct mc13xxx_regulator_init_data mx31_3ds_regulators[] = {
    {
        .id = MC13783_REG_PWGT1SPI, /* Power Gate for ARM core. */
        .init_data = &pwgtx_init,
    }, {
        .id = MC13783_REG_PWGT2SPI, /* Power Gate for L2 Cache. */
        .init_data = &pwgtx_init,
    }, {

        .id = MC13783_REG_GPO1, /* Turn on 1.8V */
        .init_data = &gpo_init,
    }, {
        .id = MC13783_REG_GPO3, /* Turn on 3.3V */
        .init_data = &gpo_init,
    }, {
        .id = MC13783_REG_VMMC2, /* Power MMC/SD, WiFi/Bluetooth. */
        .init_data = &vmmc2_init,
    }, {
        .id = MC13783_REG_VMMC1, /* Power LCD, CMOS, FM, GPS, Accel. */
        .init_data = &vmmc1_init,
    }, {
        .id = MC13783_REG_VGEN,  /* Power LCD */
        .init_data = &vgen_init,
    }, {
        .id = MC13783_REG_VVIB,  /* Power CMOS */
        .init_data = &vvib_init,
    },
};

/* MC13783 */
static struct mc13xxx_codec_platform_data mx31_3ds_codec = {
    .dac_ssi_port = MC13783_SSI1_PORT,
    .adc_ssi_port = MC13783_SSI1_PORT,
};

static struct mc13xxx_platform_data mc13783_pdata = {
    .regulators = {
        .regulators = mx31_3ds_regulators,
        .num_regulators = ARRAY_SIZE(mx31_3ds_regulators),
    },
    .codec = &mx31_3ds_codec,
    .flags  = MC13XXX_USE_TOUCHSCREEN | MC13XXX_USE_RTC | MC13XXX_USE_CODEC,

};

static struct imx_ssi_platform_data mx31_3ds_ssi_pdata = {
    .flags = IMX_SSI_DMA | IMX_SSI_NET,
};

/* SPI */
static int spi0_internal_chipselect[] = {
    MXC_SPI_CS(2),
};

static const struct spi_imx_master spi0_pdata __initconst = {
    .chipselect = spi0_internal_chipselect,
    .num_chipselect = ARRAY_SIZE(spi0_internal_chipselect),
};

static int spi1_internal_chipselect[] = {
    MXC_SPI_CS(0),
    MXC_SPI_CS(2),
};

static const struct spi_imx_master spi1_pdata __initconst = {
    .chipselect = spi1_internal_chipselect,
    .num_chipselect = ARRAY_SIZE(spi1_internal_chipselect),
};

static struct spi_board_info mx31_3ds_spi_devs[] __initdata = {
    {
        .modalias   = "mc13783",
        .max_speed_hz   = 1000000,
        .bus_num    = 1,
        .chip_select    = 1, /* SS2 */
        .platform_data  = &mc13783_pdata,
        /* irq number is run-time assigned */
        .mode = SPI_CS_HIGH,
    }, {
        .modalias   = "l4f00242t03",
        .max_speed_hz   = 5000000,
        .bus_num    = 0,
        .chip_select    = 0, /* SS2 */
        .platform_data  = &mx31_3ds_l4f00242t03_pdata,
    },
};

/*
 * NAND Flash
 */
static const struct mxc_nand_platform_data
mx31_3ds_nand_board_info __initconst = {
    .width      = 1,
    .hw_ecc     = 1,
#ifdef CONFIG_MACH_MX31_3DS_MXC_NAND_USE_BBT
    .flash_bbt  = 1,
#endif
};

/*
 * USB OTG
 */

#define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
             PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)

#define USBOTG_RST_B IOMUX_TO_GPIO(MX31_PIN_USB_PWR)
#define USBH2_RST_B IOMUX_TO_GPIO(MX31_PIN_USB_BYP)

static int mx31_3ds_usbotg_init(void)
{
    int err;

    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, USB_PAD_CFG);

    err = gpio_request(USBOTG_RST_B, "otgusb-reset");
    if (err) {
        pr_err("Failed to request the USB OTG reset gpio\n");
        return err;
    }

    err = gpio_direction_output(USBOTG_RST_B, 0);
    if (err) {
        pr_err("Failed to drive the USB OTG reset gpio\n");
        goto usbotg_free_reset;
    }

    mdelay(1);
    gpio_set_value(USBOTG_RST_B, 1);
    return 0;

usbotg_free_reset:
    gpio_free(USBOTG_RST_B);
    return err;
}

static int mx31_3ds_otg_init(struct platform_device *pdev)
{
    return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
}

static int mx31_3ds_host2_init(struct platform_device *pdev)
{
    int err;

    mxc_iomux_set_pad(MX31_PIN_USBH2_CLK, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBH2_DIR, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBH2_NXT, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBH2_STP, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBH2_DATA0, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_USBH2_DATA1, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_PC_VS2, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_PC_BVD1, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_PC_BVD2, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_PC_RST, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_IOIS16, USB_PAD_CFG);
    mxc_iomux_set_pad(MX31_PIN_PC_RW_B, USB_PAD_CFG);

    err = gpio_request(USBH2_RST_B, "usbh2-reset");
    if (err) {
        pr_err("Failed to request the USB Host 2 reset gpio\n");
        return err;
    }

    err = gpio_direction_output(USBH2_RST_B, 0);
    if (err) {
        pr_err("Failed to drive the USB Host 2 reset gpio\n");
        goto usbotg_free_reset;
    }

    mdelay(1);
    gpio_set_value(USBH2_RST_B, 1);

    mdelay(10);

    return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);

usbotg_free_reset:
    gpio_free(USBH2_RST_B);
    return err;
}

static struct mxc_usbh_platform_data otg_pdata __initdata = {
    .init   = mx31_3ds_otg_init,
    .portsc = MXC_EHCI_MODE_ULPI,
};

static struct mxc_usbh_platform_data usbh2_pdata __initdata = {
    .init = mx31_3ds_host2_init,
    .portsc = MXC_EHCI_MODE_ULPI,
};

static const struct fsl_usb2_platform_data usbotg_pdata __initconst = {
    .operating_mode = FSL_USB2_DR_DEVICE,
    .phy_mode   = FSL_USB2_PHY_ULPI,
};

static bool otg_mode_host __initdata;

static int __init mx31_3ds_otg_mode(char *options)
{
    if (!strcmp(options, "host"))
        otg_mode_host = true;
    else if (!strcmp(options, "device"))
        otg_mode_host = false;
    else
        pr_info("otg_mode neither \"host\" nor \"device\". "
            "Defaulting to device\n");
    return 1;
}
__setup("otg_mode=", mx31_3ds_otg_mode);

static const struct imxuart_platform_data uart_pdata __initconst = {
    .flags = IMXUART_HAVE_RTSCTS,
};

static const struct imxi2c_platform_data mx31_3ds_i2c0_data __initconst = {
    .bitrate = 100000,
};

static struct platform_device *devices[] __initdata = {
    &mx31_3ds_ov2640,
};

static void __init mx31_3ds_init(void)
{
    int ret;

    imx31_soc_init();

    /* Configure SPI1 IOMUX */
    mxc_iomux_set_gpr(MUX_PGP_CSPI_BB, true);

    mxc_iomux_setup_multiple_pins(mx31_3ds_pins, ARRAY_SIZE(mx31_3ds_pins),
                      "mx31_3ds");

    imx31_add_imx_uart0(&uart_pdata);
    imx31_add_mxc_nand(&mx31_3ds_nand_board_info);

    imx31_add_spi_imx1(&spi1_pdata);
    mx31_3ds_spi_devs[0].irq = gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_3));
    spi_register_board_info(mx31_3ds_spi_devs,
                        ARRAY_SIZE(mx31_3ds_spi_devs));

    platform_add_devices(devices, ARRAY_SIZE(devices));

    imx31_add_imx_keypad(&mx31_3ds_keymap_data);

    mx31_3ds_usbotg_init();
    if (otg_mode_host) {
        otg_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
                ULPI_OTG_DRVVBUS_EXT);
        if (otg_pdata.otg)
            imx31_add_mxc_ehci_otg(&otg_pdata);
    }
    usbh2_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
            ULPI_OTG_DRVVBUS_EXT);
    if (usbh2_pdata.otg)
        imx31_add_mxc_ehci_hs(2, &usbh2_pdata);

    if (!otg_mode_host)
        imx31_add_fsl_usb2_udc(&usbotg_pdata);

    if (mxc_expio_init(MX31_CS5_BASE_ADDR, IOMUX_TO_GPIO(MX31_PIN_GPIO1_1)))
        printk(KERN_WARNING "Init of the debug board failed, all "
                    "devices on the debug board are unusable.\n");
    imx31_add_imx2_wdt();
    imx31_add_imx_i2c0(&mx31_3ds_i2c0_data);
    imx31_add_mxc_mmc(0, &sdhc1_pdata);

    imx31_add_spi_imx0(&spi0_pdata);
    imx31_add_ipu_core();
    imx31_add_mx3_sdc_fb(&mx3fb_pdata);

    /* CSI */
    /* Camera power: default - off */
    ret = gpio_request_array(mx31_3ds_camera_gpios,
                 ARRAY_SIZE(mx31_3ds_camera_gpios));
    if (ret) {
        pr_err("Failed to request camera gpios");
        iclink_ov2640.power = NULL;
    }

    mx31_3ds_init_camera();

    imx31_add_imx_ssi(0, &mx31_3ds_ssi_pdata);

    imx_add_platform_device("imx_mc13783", 0, NULL, 0, NULL, 0);
}

static void __init mx31_3ds_timer_init(void)
{
    mx31_clocks_init(26000000);
}

static struct sys_timer mx31_3ds_timer = {
    .init   = mx31_3ds_timer_init,
};

static void __init mx31_3ds_reserve(void)
{
    /* reserve MX31_3DS_CAMERA_BUF_SIZE bytes for mx3-camera */
    mx3_camera_base = arm_memblock_steal(MX31_3DS_CAMERA_BUF_SIZE,
                     MX31_3DS_CAMERA_BUF_SIZE);
}

MACHINE_START(MX31_3DS, "Freescale MX31PDK (3DS)")
    /* Maintainer: Freescale Semiconductor, Inc. */
    .atag_offset = 0x100,
    .map_io = mx31_map_io,
    .init_early = imx31_init_early,
    .init_irq = mx31_init_irq,
    .handle_irq = imx31_handle_irq,
    .timer = &mx31_3ds_timer,
    .init_machine = mx31_3ds_init,
    .reserve = mx31_3ds_reserve,
    .restart    = mxc_restart,
MACHINE_END