arch/arm/mach-imx/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
  23 #include <linux/usb/otg.h>
  24 #include <linux/usb/ulpi.h>
  25
  26 #include <media/soc_camera.h>
  27
  28 #include "board-mx31moboard.h"
  29 #include "common.h"
  30 #include "devices-imx31.h"
  31 #include "hardware.h"
  32 #include "iomux-mx3.h"
  33 #include "ulpi.h"
  34
  35 static unsigned int smartbot_pins[] = {
  36         /* UART1 */
  37         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  38         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  39         /* CSI */
  40         MX31_PIN_CSI_D4__CSI_D4, MX31_PIN_CSI_D5__CSI_D5,
  41         MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
  42         MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
  43         MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
  44         MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
  45         MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
  46         MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
  47         MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
  48         MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
  49         /* ENABLES */
  50         MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
  51         MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
  52 };
  53
  54 static const struct imxuart_platform_data uart_pdata __initconst = {
  55         .flags = IMXUART_HAVE_RTSCTS,
  56 };
  57
  58 #define CAM_POWER       IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
  59 #define CAM_RST_B       IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
  60
  61 static int smartbot_cam_power(struct device *dev, int on)
  62 {
  63         gpio_set_value(CAM_POWER, !on);
  64         return 0;
  65 }
  66
  67 static int smartbot_cam_reset(struct device *dev)
  68 {
  69         gpio_set_value(CAM_RST_B, 0);
  70         udelay(100);
  71         gpio_set_value(CAM_RST_B, 1);
  72         return 0;
  73 }
  74
  75 static struct i2c_board_info smartbot_i2c_devices[] = {
  76         {
  77                 I2C_BOARD_INFO("mt9t031", 0x5d),
  78         },
  79 };
  80
  81 static struct soc_camera_link base_iclink = {
  82         .bus_id         = 0,            /* Must match with the camera ID */
  83         .power          = smartbot_cam_power,
  84         .reset          = smartbot_cam_reset,
  85         .board_info     = &smartbot_i2c_devices[0],
  86         .i2c_adapter_id = 0,
  87 };
  88
  89 static struct platform_device smartbot_camera[] = {
  90         {
  91                 .name   = "soc-camera-pdrv",
  92                 .id     = 0,
  93                 .dev    = {
  94                         .platform_data = &base_iclink,
  95                 },
  96         },
  97 };
  98
  99 static struct platform_device *smartbot_cameras[] __initdata = {
 100         &smartbot_camera[0],
 101 };
 102
 103 static int __init smartbot_cam_init(void)
 104 {
 105         int ret = gpio_request(CAM_RST_B, "cam-reset");
 106         if (ret)
 107                 return ret;
 108         gpio_direction_output(CAM_RST_B, 1);
 109         ret = gpio_request(CAM_POWER, "cam-standby");
 110         if (ret)
 111                 return ret;
 112         gpio_direction_output(CAM_POWER, 0);
 113
 114         return 0;
 115 }
 116
 117 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
 118         .operating_mode = FSL_USB2_DR_DEVICE,
 119         .phy_mode       = FSL_USB2_PHY_ULPI,
 120 };
 121
 122 #if defined(CONFIG_USB_ULPI)
 123
 124 static int smartbot_otg_init(struct platform_device *pdev)
 125 {
 126         return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED);
 127 }
 128
 129 static struct mxc_usbh_platform_data otg_host_pdata __initdata = {
 130         .init   = smartbot_otg_init,
 131         .portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
 132 };
 133
 134 static int __init smartbot_otg_host_init(void)
 135 {
 136         struct platform_device *pdev;
 137
 138         otg_host_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
 139                 ULPI_OTG_DRVVBUS_EXT);
 140         if (!otg_host_pdata.otg)
 141                 return -ENODEV;
 142
 143         pdev = imx31_add_mxc_ehci_otg(&otg_host_pdata);
 144         if (IS_ERR(pdev))
 145                 return PTR_ERR(pdev);
 146
 147         return 0;
 148 }
 149 #else
 150 static inline int smartbot_otg_host_init(void) { return 0; }
 151 #endif
 152
 153 #define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 154 #define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 155 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
 156 #define TRSLAT_SRC_CHOICE IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
 157
 158 static void smartbot_resets_init(void)
 159 {
 160         if (!gpio_request(POWER_EN, "power-enable")) {
 161                 gpio_direction_output(POWER_EN, 0);
 162                 gpio_export(POWER_EN, false);
 163         }
 164
 165         if (!gpio_request(DSPIC_RST_B, "dspic-rst")) {
 166                 gpio_direction_output(DSPIC_RST_B, 0);
 167                 gpio_export(DSPIC_RST_B, false);
 168         }
 169
 170         if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
 171                 gpio_direction_output(TRSLAT_RST_B, 0);
 172                 gpio_export(TRSLAT_RST_B, false);
 173         }
 174
 175         if (!gpio_request(TRSLAT_SRC_CHOICE, "translator-src-choice")) {
 176                 gpio_direction_output(TRSLAT_SRC_CHOICE, 0);
 177                 gpio_export(TRSLAT_SRC_CHOICE, false);
 178         }
 179 }
 180 /*
 181  * system init for baseboard usage. Will be called by mx31moboard init.
 182  */
 183 void __init mx31moboard_smartbot_init(int board)
 184 {
 185         printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
 186
 187         mxc_iomux_setup_multiple_pins(smartbot_pins, ARRAY_SIZE(smartbot_pins),
 188                 "smartbot");
 189
 190         imx31_add_imx_uart1(&uart_pdata);
 191
 192         switch (board) {
 193         case MX31SMARTBOT:
 194                 imx31_add_fsl_usb2_udc(&usb_pdata);
 195                 break;
 196         case MX31EYEBOT:
 197                 smartbot_otg_host_init();
 198                 break;
 199         default:
 200                 printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
 201                         board);
 202         }
 203
 204         smartbot_resets_init();
 205
 206         smartbot_cam_init();
 207         platform_add_devices(smartbot_cameras, ARRAY_SIZE(smartbot_cameras));
 208 }