arch/arm/mach-mx3/mx31moboard-marxbot.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  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <linux/fsl_devices.h>
  20 #include <linux/gpio.h>
  21 #include <linux/init.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/types.h>
  25
  26 #include <mach/common.h>
  27 #include <mach/hardware.h>
  28 #include <mach/imx-uart.h>
  29 #include <mach/iomux-mx3.h>
  30 #include <mach/mmc.h>
  31
  32 #include "devices.h"
  33
  34 static unsigned int marxbot_pins[] = {
  35         /* SDHC2 */
  36         MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
  37         MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
  38         MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
  39         MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
  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         MX31_PIN_TXD2__GPIO1_28,
  51         /* USB OTG */
  52         MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
  53         MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
  54         MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
  55         MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
  56         MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
  57         MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
  58         MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
  59         MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
  60         MX31_PIN_USBOTG_CLK__USBOTG_CLK, MX31_PIN_USBOTG_DIR__USBOTG_DIR,
  61         MX31_PIN_USBOTG_NXT__USBOTG_NXT, MX31_PIN_USBOTG_STP__USBOTG_STP,
  62         MX31_PIN_USB_OC__GPIO1_30,
  63 };
  64
  65 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
  66 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
  67
  68 static int marxbot_sdhc2_get_ro(struct device *dev)
  69 {
  70         return !gpio_get_value(SDHC2_WP);
  71 }
  72
  73 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
  74                 void *data)
  75 {
  76         int ret;
  77
  78         ret = gpio_request(SDHC2_CD, "sdhc-detect");
  79         if (ret)
  80                 return ret;
  81
  82         gpio_direction_input(SDHC2_CD);
  83
  84         ret = gpio_request(SDHC2_WP, "sdhc-wp");
  85         if (ret)
  86                 goto err_gpio_free;
  87         gpio_direction_input(SDHC2_WP);
  88
  89         ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
  90                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  91                 "sdhc2-card-detect", data);
  92         if (ret)
  93                 goto err_gpio_free_2;
  94
  95         return 0;
  96
  97 err_gpio_free_2:
  98         gpio_free(SDHC2_WP);
  99 err_gpio_free:
 100         gpio_free(SDHC2_CD);
 101
 102         return ret;
 103 }
 104
 105 static void marxbot_sdhc2_exit(struct device *dev, void *data)
 106 {
 107         free_irq(gpio_to_irq(SDHC2_CD), data);
 108         gpio_free(SDHC2_WP);
 109         gpio_free(SDHC2_CD);
 110 }
 111
 112 static struct imxmmc_platform_data sdhc2_pdata = {
 113         .get_ro = marxbot_sdhc2_get_ro,
 114         .init   = marxbot_sdhc2_init,
 115         .exit   = marxbot_sdhc2_exit,
 116 };
 117
 118 static struct fsl_usb2_platform_data usb_pdata = {
 119         .operating_mode = FSL_USB2_DR_DEVICE,
 120         .phy_mode       = FSL_USB2_PHY_ULPI,
 121 };
 122
 123 #define OTG_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST)
 124 #define OTG_EN_B IOMUX_TO_GPIO(MX31_PIN_USB_OC)
 125
 126 static void marxbot_usbotg_init(void)
 127 {
 128         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, OTG_PAD_CFG);
 129         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, OTG_PAD_CFG);
 130         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, OTG_PAD_CFG);
 131         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, OTG_PAD_CFG);
 132         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, OTG_PAD_CFG);
 133         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, OTG_PAD_CFG);
 134         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, OTG_PAD_CFG);
 135         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, OTG_PAD_CFG);
 136         mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, OTG_PAD_CFG);
 137         mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, OTG_PAD_CFG);
 138         mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, OTG_PAD_CFG);
 139         mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, OTG_PAD_CFG);
 140
 141         gpio_request(OTG_EN_B, "usb-udc-en");
 142         gpio_direction_output(OTG_EN_B, 0);
 143 }
 144
 145 /*
 146  * system init for baseboard usage. Will be called by mx31moboard init.
 147  */
 148 void __init mx31moboard_marxbot_init(void)
 149 {
 150         printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
 151
 152         mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
 153                 "marxbot");
 154
 155         mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
 156
 157         marxbot_usbotg_init();
 158         mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 159 }