release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-mx3/mx31moboard-smartbot.c

   1 /*
   2  * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/gpio.h>
  17 #include <linux/init.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/i2c.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/types.h>
  22 #include <linux/fsl_devices.h>
  23
  24 #include <linux/usb/otg.h>
  25 #include <linux/usb/ulpi.h>
  26
  27 #include <mach/common.h>
  28 #include <mach/hardware.h>
  29 #include <mach/iomux-mx3.h>
  30 #include <mach/board-mx31moboard.h>
  31 #include <mach/mxc_ehci.h>
  32 #include <mach/ulpi.h>
  33
  34 #include <media/soc_camera.h>
  35
  36 #include "devices-imx31.h"
  37 #include "devices.h"
  38
  39 static unsigned int smartbot_pins[] = {
  40         /* UART1 */
  41         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  42         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  43         /* CSI */
  44         MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
  45         MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
  46         MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
  47         MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
  48         MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
  49         MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
  50         MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
  51         MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
  52         MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
  53         /* ENABLES */
  54         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  55         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  56 };
  57
  58 static const struct imxuart_platform_data uart_pdata __initconst = {
  59         .flags = IMXUART_HAVE_RTSCTS,
  60 };
  61
  62 #define CAM_POWER       IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
  63 #define CAM_RST_B       IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
  64
  65 static int smartbot_cam_power(struct device *dev, int on)
  66 {
  67         gpio_set_value(CAM_POWER, !on);
  68         return 0;
  69 }
  70
  71 static int smartbot_cam_reset(struct device *dev)
  72 {
  73         gpio_set_value(CAM_RST_B, 0);
  74         udelay(100);
  75         gpio_set_value(CAM_RST_B, 1);
  76         return 0;
  77 }
  78
  79 static struct i2c_board_info smartbot_i2c_devices[] = {
  80         {
  81                 I2C_BOARD_INFO("mt9t031", 0x5d),
  82         },
  83 };
  84
  85 static struct soc_camera_link base_iclink = {
  86         .bus_id         = 0,            /* Must match with the camera ID */
  87         .power          = smartbot_cam_power,
  88         .reset          = smartbot_cam_reset,
  89         .board_info     = &smartbot_i2c_devices[0],
  90         .i2c_adapter_id = 0,
  91         .module_name    = "mt9t031",
  92 };
  93
  94 static struct platform_device smartbot_camera[] = {
  95         {
  96                 .name   = "soc-camera-pdrv",
  97                 .id     = 0,
  98                 .dev    = {
  99                         .platform_data = &base_iclink,
 100                 },
 101         },
 102 };
 103
 104 static struct platform_device *smartbot_cameras[] __initdata = {
 105         &smartbot_camera[0],
 106 };
 107
 108 static int __init smartbot_cam_init(void)
 109 {
 110         int ret = gpio_request(CAM_RST_B, "cam-reset");
 111         if (ret)
 112                 return ret;
 113         gpio_direction_output(CAM_RST_B, 1);
 114         ret = gpio_request(CAM_POWER, "cam-standby");
 115         if (ret)
 116                 return ret;
 117         gpio_direction_output(CAM_POWER, 0);
 118
 119         return 0;
 120 }
 121
 122 static struct fsl_usb2_platform_data usb_pdata = {
 123         .operating_mode = FSL_USB2_DR_DEVICE,
 124         .phy_mode       = FSL_USB2_PHY_ULPI,
 125 };
 126
 127 #if defined(CONFIG_USB_ULPI)
 128
 129 static struct mxc_usbh_platform_data otg_host_pdata = {
 130         .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
 131         .flags  = MXC_EHCI_POWER_PINS_ENABLED,
 132 };
 133
 134 static int __init smartbot_otg_host_init(void)
 135 {
 136         otg_host_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
 137                         ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
 138
 139         return mxc_register_device(&mxc_otg_host, &otg_host_pdata);
 140 }
 141 #else
 142 static inline int smartbot_otg_host_init(void) { return 0; }
 143 #endif
 144
 145 #define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 146 #define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 147 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 148 #define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 149
 150 static void smartbot_resets_init(void)
 151 {
 152         if (!gpio_request(POWER_EN, "power-enable")) {
 153                 gpio_direction_output(POWER_EN, 0);
 154                 gpio_export(POWER_EN, false);
 155         }
 156
 157         if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
 158                 gpio_direction_output(DSPIC_RST_B, 0);
 159                 gpio_export(DSPIC_RST_B, false);
 160         }
 161
 162         if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
 163                 gpio_direction_output(TRSLAT_RST_B, 0);
 164                 gpio_export(TRSLAT_RST_B, false);
 165         }
 166
 167         if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
 168                 gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
 169                 gpio_export(TRSLAT_SRC_CHOICE, false);
 170         }
 171 }
 172 /*
 173  * system init for baseboard usage. Will be called by mx31moboard init.
 174  */
 175 void __init mx31moboard_smartbot_init(int board)
 176 {
 177         printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
 178
 179         mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
 180                 "smartbot");
 181
 182         imx31_add_imx_uart1(&uart_pdata);
 183
 184         switch (board) {
 185         case MX31SMARTBOT:
 186                 mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 187                 break;
 188         case MX31EYEBOT:
 189                 smartbot_otg_host_init();
 190                 break;
 191         default:
 192                 printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
 193                         board);
 194         }
 195
 196         smartbot_resets_init();
 197
 198         smartbot_cam_init();
 199         platform_add_devices(smartbot_cameras, ARRAY_SIZE(smartbot_cameras));
 200 }