/*
   * 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 <media/soc_camera.h>
  
  #include "board-mx31moboard.h"
  #include "common.h"
  #include "devices-imx31.h"
  #include "hardware.h"
  #include "iomux-mx3.h"
  #include "ulpi.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
  ");
  
  	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));
  }