mx31moboard-smartbot.c

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/*
 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
 *
 * 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/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/types.h>

#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>

#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx3.h>
#include <mach/board-mx31moboard.h>
#include <mach/ulpi.h>

#include <media/soc_camera.h>

#include "devices-imx31.h"

static unsigned int smartbot_pins[] = {
    /* UART1 */
    MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
    MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
    /* CSI */
    MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
    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_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
    /* ENABLES */
    MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
    MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
};

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

#define CAM_POWER   IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
#define CAM_RST_B   IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)

static int smartbot_cam_power(struct device *dev, int on)
{
    gpio_set_value(CAM_POWER, !on);
    return 0;
}

static int smartbot_cam_reset(struct device *dev)
{
    gpio_set_value(CAM_RST_B, 0);
    udelay(100);
    gpio_set_value(CAM_RST_B, 1);
    return 0;
}

static struct i2c_board_info smartbot_i2c_devices[] = {
    {
        I2C_BOARD_INFO("mt9t031", 0x5d),
    },
};

static struct soc_camera_link base_iclink = {
    .bus_id     = 0,        /* Must match with the camera ID */
    .power      = smartbot_cam_power,
    .reset      = smartbot_cam_reset,
    .board_info = &smartbot_i2c_devices[0],
    .i2c_adapter_id = 0,
};

static struct platform_device smartbot_camera[] = {
    {
        .name   = "soc-camera-pdrv",
        .id = 0,
        .dev    = {
            .platform_data = &base_iclink,
        },
    },
};

static struct platform_device *smartbot_cameras[] __initdata = {
    &smartbot_camera[0],
};

static int __init smartbot_cam_init(void)
{
    int ret = gpio_request(CAM_RST_B, "cam-reset");
    if (ret)
        return ret;
    gpio_direction_output(CAM_RST_B, 1);
    ret = gpio_request(CAM_POWER, "cam-standby");
    if (ret)
        return ret;
    gpio_direction_output(CAM_POWER, 0);

    return 0;
}

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

#if defined(CONFIG_USB_ULPI)

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

static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
    .init   = smartbot_otg_init,
    .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
};

static int __init smartbot_otg_host_init(void)
{
    struct platform_device *pdev;

    otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
        ULPI_OTG_DRVVBUS_EXT);
    if (!otg_host_pdata.otg)
        return -ENODEV;

    pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
    if (IS_ERR(pdev))
        return PTR_ERR(pdev);

    return 0;
}
#else
static inline int smartbot_otg_host_init(void) { return 0; }
#endif

#define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
#define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
#define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
#define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)

static void smartbot_resets_init(void)
{
    if (!gpio_request(POWER_EN, "power-enable")) {
        gpio_direction_output(POWER_EN, 0);
        gpio_export(POWER_EN, false);
    }

    if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
        gpio_direction_output(DSPIC_RST_B, 0);
        gpio_export(DSPIC_RST_B, false);
    }

    if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
        gpio_direction_output(TRSLAT_RST_B, 0);
        gpio_export(TRSLAT_RST_B, false);
    }

    if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
        gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
        gpio_export(TRSLAT_SRC_CHOICE, false);
    }
}
/*
 * system init for baseboard usage. Will be called by mx31moboard init.
 */
void __init mx31moboard_smartbot_init(int board)
{
    printk(KERN_INFO "Initializing mx31smartbot peripherals\n");

    mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
        "smartbot");

    imx31_add_imx_uart1(&uart_pdata);

    switch (board) {
    case MX31SMARTBOT:
        imx31_add_fsl_usb2_udc(&usb_pdata);
        break;
    case MX31EYEBOT:
        smartbot_otg_host_init();
        break;
    default:
        printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
            board);
    }

    smartbot_resets_init();

    smartbot_cam_init();
    platform_add_devices(smartbot_cameras, ARRAY_SIZE(smartbot_cameras));
}