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