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mx31moboard-smartbot.c

/*
 * 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"
#include "devices.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 struct mxc_usbh_platform_data otg_host_pdata __initdata = {
      .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
      .flags      = MXC_EHCI_POWER_PINS_ENABLED,
};

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

      otg_host_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
                  ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);

      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));
}

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