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