arch/arm/mach-imx/mx31lite-db.c

   1 /*
   2  *  LogicPD i.MX31 SOM-LV development board support
   3  *
   4  *    Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   5  *
   6  *  based on code for other MX31 boards,
   7  *
   8  *    Copyright 2005-2007 Freescale Semiconductor
   9  *    Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
  10  *    Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  */
  22
  23 #include <linux/kernel.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/gpio.h>
  27 #include <linux/leds.h>
  28 #include <linux/platform_device.h>
  29
  30 #include <asm/mach-types.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/map.h>
  33
  34 #include <mach/hardware.h>
  35 #include <mach/common.h>
  36 #include <mach/iomux-mx3.h>
  37 #include <mach/board-mx31lite.h>
  38
  39 #include "devices-imx31.h"
  40
  41 /*
  42  * This file contains board-specific initialization routines for the
  43  * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
  44  * If you design an own baseboard for the module, use this file as base
  45  * for support code.
  46  */
  47
  48 static unsigned int litekit_db_board_pins[] __initdata = {
  49         /* UART1 */
  50         MX31_PIN_CTS1__CTS1,
  51         MX31_PIN_RTS1__RTS1,
  52         MX31_PIN_TXD1__TXD1,
  53         MX31_PIN_RXD1__RXD1,
  54         /* SPI 0 */
  55         MX31_PIN_CSPI1_SCLK__SCLK,
  56         MX31_PIN_CSPI1_MOSI__MOSI,
  57         MX31_PIN_CSPI1_MISO__MISO,
  58         MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
  59         MX31_PIN_CSPI1_SS0__SS0,
  60         MX31_PIN_CSPI1_SS1__SS1,
  61         MX31_PIN_CSPI1_SS2__SS2,
  62         /* SDHC1 */
  63         MX31_PIN_SD1_DATA0__SD1_DATA0,
  64         MX31_PIN_SD1_DATA1__SD1_DATA1,
  65         MX31_PIN_SD1_DATA2__SD1_DATA2,
  66         MX31_PIN_SD1_DATA3__SD1_DATA3,
  67         MX31_PIN_SD1_CLK__SD1_CLK,
  68         MX31_PIN_SD1_CMD__SD1_CMD,
  69 };
  70
  71 /* UART */
  72 static const struct imxuart_platform_data uart_pdata __initconst = {
  73         .flags = IMXUART_HAVE_RTSCTS,
  74 };
  75
  76 /* MMC */
  77
  78 static int gpio_det, gpio_wp;
  79
  80 #define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  81                      PAD_CTL_ODE_CMOS)
  82
  83 static int mxc_mmc1_get_ro(struct device *dev)
  84 {
  85         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  86 }
  87
  88 static int mxc_mmc1_init(struct device *dev,
  89                          irq_handler_t detect_irq, void *data)
  90 {
  91         int ret;
  92
  93         gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  94         gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  95
  96         mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
  97                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  98         mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
  99                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 100         mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
 101                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 102         mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
 103                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 104         mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
 105                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 106         mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
 107
 108         ret = gpio_request(gpio_det, "MMC detect");
 109         if (ret)
 110                 return ret;
 111
 112         ret = gpio_request(gpio_wp, "MMC w/p");
 113         if (ret)
 114                 goto exit_free_det;
 115
 116         gpio_direction_input(gpio_det);
 117         gpio_direction_input(gpio_wp);
 118
 119         ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
 120                           detect_irq,
 121                           IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 122                           "MMC detect", data);
 123         if (ret)
 124                 goto exit_free_wp;
 125
 126         return 0;
 127
 128 exit_free_wp:
 129         gpio_free(gpio_wp);
 130
 131 exit_free_det:
 132         gpio_free(gpio_det);
 133
 134         return ret;
 135 }
 136
 137 static void mxc_mmc1_exit(struct device *dev, void *data)
 138 {
 139         gpio_free(gpio_det);
 140         gpio_free(gpio_wp);
 141         free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
 142 }
 143
 144 static const struct imxmmc_platform_data mmc_pdata __initconst = {
 145         .get_ro  = mxc_mmc1_get_ro,
 146         .init      = mxc_mmc1_init,
 147         .exit      = mxc_mmc1_exit,
 148 };
 149
 150 /* SPI */
 151
 152 static int spi_internal_chipselect[] = {
 153         MXC_SPI_CS(0),
 154         MXC_SPI_CS(1),
 155         MXC_SPI_CS(2),
 156 };
 157
 158 static const struct spi_imx_master spi0_pdata __initconst = {
 159         .chipselect     = spi_internal_chipselect,
 160         .num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
 161 };
 162
 163 /* GPIO LEDs */
 164
 165 static const struct gpio_led litekit_leds[] __initconst = {
 166         {
 167                 .name           = "GPIO0",
 168                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 169                 .active_low     = 1,
 170                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 171         },
 172         {
 173                 .name           = "GPIO1",
 174                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 175                 .active_low     = 1,
 176                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 177         }
 178 };
 179
 180 static const struct gpio_led_platform_data
 181                 litekit_led_platform_data __initconst = {
 182         .leds           = litekit_leds,
 183         .num_leds       = ARRAY_SIZE(litekit_leds),
 184 };
 185
 186 void __init mx31lite_db_init(void)
 187 {
 188         mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 189                                         ARRAY_SIZE(litekit_db_board_pins),
 190                                         "development board pins");
 191         imx31_add_imx_uart0(&uart_pdata);
 192         imx31_add_mxc_mmc(0, &mmc_pdata);
 193         imx31_add_spi_imx0(&spi0_pdata);
 194         gpio_led_register_device(-1, &litekit_led_platform_data);
 195         imx31_add_imx2_wdt();
 196         imx31_add_mxc_rtc();
 197 }