arch/arm/mach-mx3/mx31moboard-devboard.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/imx-uart.h>
  28 #include <mach/iomux-mx3.h>
  29 #include <mach/hardware.h>
  30 #include <mach/mmc.h>
  31
  32 #include "devices.h"
  33
  34 static unsigned int devboard_pins[] = {
  35         /* UART1 */
  36         MX31_PIN_CTS2__CTS2, MX31_PIN_RTS2__RTS2,
  37         MX31_PIN_TXD2__TXD2, MX31_PIN_RXD2__RXD2,
  38         /* SDHC2 */
  39         MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
  40         MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
  41         MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
  42         MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
  43         /* USB OTG */
  44         MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
  45         MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
  46         MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
  47         MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
  48         MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
  49         MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
  50         MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
  51         MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
  52         MX31_PIN_USBOTG_CLK__USBOTG_CLK, MX31_PIN_USBOTG_DIR__USBOTG_DIR,
  53         MX31_PIN_USBOTG_NXT__USBOTG_NXT, MX31_PIN_USBOTG_STP__USBOTG_STP,
  54         MX31_PIN_USB_OC__GPIO1_30,
  55 };
  56
  57 static struct imxuart_platform_data uart_pdata = {
  58         .flags = IMXUART_HAVE_RTSCTS,
  59 };
  60
  61 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
  62 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
  63
  64 static int devboard_sdhc2_get_ro(struct device *dev)
  65 {
  66         return gpio_get_value(SDHC2_WP);
  67 }
  68
  69 static int devboard_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
  70                 void *data)
  71 {
  72         int ret;
  73
  74         ret = gpio_request(SDHC2_CD, "sdhc-detect");
  75         if (ret)
  76                 return ret;
  77
  78         gpio_direction_input(SDHC2_CD);
  79
  80         ret = gpio_request(SDHC2_WP, "sdhc-wp");
  81         if (ret)
  82                 goto err_gpio_free;
  83         gpio_direction_input(SDHC2_WP);
  84
  85         ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
  86                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  87                 "sdhc2-card-detect", data);
  88         if (ret)
  89                 goto err_gpio_free_2;
  90
  91         return 0;
  92
  93 err_gpio_free_2:
  94         gpio_free(SDHC2_WP);
  95 err_gpio_free:
  96         gpio_free(SDHC2_CD);
  97
  98         return ret;
  99 }
 100
 101 static void devboard_sdhc2_exit(struct device *dev, void *data)
 102 {
 103         free_irq(gpio_to_irq(SDHC2_CD), data);
 104         gpio_free(SDHC2_WP);
 105         gpio_free(SDHC2_CD);
 106 }
 107
 108 static struct imxmmc_platform_data sdhc2_pdata = {
 109         .get_ro = devboard_sdhc2_get_ro,
 110         .init   = devboard_sdhc2_init,
 111         .exit   = devboard_sdhc2_exit,
 112 };
 113
 114 static struct fsl_usb2_platform_data usb_pdata = {
 115         .operating_mode = FSL_USB2_DR_DEVICE,
 116         .phy_mode       = FSL_USB2_PHY_ULPI,
 117 };
 118
 119 #define OTG_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST)
 120 #define OTG_EN_B IOMUX_TO_GPIO(MX31_PIN_USB_OC)
 121
 122 static void devboard_usbotg_init(void)
 123 {
 124         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, OTG_PAD_CFG);
 125         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, OTG_PAD_CFG);
 126         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, OTG_PAD_CFG);
 127         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, OTG_PAD_CFG);
 128         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, OTG_PAD_CFG);
 129         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, OTG_PAD_CFG);
 130         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, OTG_PAD_CFG);
 131         mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, OTG_PAD_CFG);
 132         mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, OTG_PAD_CFG);
 133         mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, OTG_PAD_CFG);
 134         mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, OTG_PAD_CFG);
 135         mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, OTG_PAD_CFG);
 136
 137         gpio_request(OTG_EN_B, "usb-udc-en");
 138         gpio_direction_output(OTG_EN_B, 0);
 139 }
 140
 141 /*
 142  * system init for baseboard usage. Will be called by mx31moboard init.
 143  */
 144 void __init mx31moboard_devboard_init(void)
 145 {
 146         printk(KERN_INFO "Initializing mx31devboard peripherals\n");
 147
 148         mxc_iomux_setup_multiple_pins(devboard_pins, ARRAY_SIZE(devboard_pins),
 149                 "devboard");
 150
 151         mxc_register_device(&mxc_uart_device1, &uart_pdata);
 152
 153         mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
 154
 155         devboard_usbotg_init();
 156         mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 157 }