release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-mx3/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 #include <mach/mmc.h>
  39
  40 #include "devices-imx31.h"
  41 #include "devices.h"
  42
  43 /*
  44  * This file contains board-specific initialization routines for the
  45  * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
  46  * If you design an own baseboard for the module, use this file as base
  47  * for support code.
  48  */
  49
  50 static unsigned int litekit_db_board_pins[] __initdata = {
  51         /* UART1 */
  52         MX31_PIN_CTS1__CTS1,
  53         MX31_PIN_RTS1__RTS1,
  54         MX31_PIN_TXD1__TXD1,
  55         MX31_PIN_RXD1__RXD1,
  56         /* SPI 0 */
  57         MX31_PIN_CSPI1_SCLK__SCLK,
  58         MX31_PIN_CSPI1_MOSI__MOSI,
  59         MX31_PIN_CSPI1_MISO__MISO,
  60         MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
  61         MX31_PIN_CSPI1_SS0__SS0,
  62         MX31_PIN_CSPI1_SS1__SS1,
  63         MX31_PIN_CSPI1_SS2__SS2,
  64         /* SDHC1 */
  65         MX31_PIN_SD1_DATA0__SD1_DATA0,
  66         MX31_PIN_SD1_DATA1__SD1_DATA1,
  67         MX31_PIN_SD1_DATA2__SD1_DATA2,
  68         MX31_PIN_SD1_DATA3__SD1_DATA3,
  69         MX31_PIN_SD1_CLK__SD1_CLK,
  70         MX31_PIN_SD1_CMD__SD1_CMD,
  71 };
  72
  73 /* UART */
  74 static const struct imxuart_platform_data uart_pdata __initconst = {
  75         .flags = IMXUART_HAVE_RTSCTS,
  76 };
  77
  78 /* MMC */
  79
  80 static int gpio_det, gpio_wp;
  81
  82 #define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  83                      PAD_CTL_ODE_CMOS)
  84
  85 static int mxc_mmc1_get_ro(struct device *dev)
  86 {
  87         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  88 }
  89
  90 static int mxc_mmc1_init(struct device *dev,
  91                          irq_handler_t detect_irq, void *data)
  92 {
  93         int ret;
  94
  95         gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  96         gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  97
  98         mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
  99                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 100         mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
 101                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 102         mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
 103                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 104         mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
 105                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 106         mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
 107                           MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 108         mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
 109
 110         ret = gpio_request(gpio_det, "MMC detect");
 111         if (ret)
 112                 return ret;
 113
 114         ret = gpio_request(gpio_wp, "MMC w/p");
 115         if (ret)
 116                 goto exit_free_det;
 117
 118         gpio_direction_input(gpio_det);
 119         gpio_direction_input(gpio_wp);
 120
 121         ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
 122                           IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 123                           "MMC detect", data);
 124         if (ret)
 125                 goto exit_free_wp;
 126
 127         return 0;
 128
 129 exit_free_wp:
 130         gpio_free(gpio_wp);
 131
 132 exit_free_det:
 133         gpio_free(gpio_det);
 134
 135         return ret;
 136 }
 137
 138 static void mxc_mmc1_exit(struct device *dev, void *data)
 139 {
 140         gpio_free(gpio_det);
 141         gpio_free(gpio_wp);
 142         free_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), data);
 143 }
 144
 145 static struct imxmmc_platform_data mmc_pdata = {
 146         .get_ro  = mxc_mmc1_get_ro,
 147         .init      = mxc_mmc1_init,
 148         .exit      = mxc_mmc1_exit,
 149 };
 150
 151 /* SPI */
 152
 153 static int spi_internal_chipselect[] = {
 154         MXC_SPI_CS(0),
 155         MXC_SPI_CS(1),
 156         MXC_SPI_CS(2),
 157 };
 158
 159 static const struct spi_imx_master spi0_pdata __initconst = {
 160         .chipselect     = spi_internal_chipselect,
 161         .num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
 162 };
 163
 164 /* GPIO LEDs */
 165
 166 static struct gpio_led litekit_leds[] = {
 167         {
 168                 .name           = "GPIO0",
 169                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 170                 .active_low     = 1,
 171                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 172         },
 173         {
 174                 .name           = "GPIO1",
 175                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 176                 .active_low     = 1,
 177                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 178         }
 179 };
 180
 181 static struct gpio_led_platform_data litekit_led_platform_data = {
 182         .leds           = litekit_leds,
 183         .num_leds       = ARRAY_SIZE(litekit_leds),
 184 };
 185
 186 static struct platform_device litekit_led_device = {
 187         .name   = "leds-gpio",
 188         .id     = -1,
 189         .dev    = {
 190                 .platform_data = &litekit_led_platform_data,
 191         },
 192 };
 193
 194 void __init mx31lite_db_init(void)
 195 {
 196         mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 197                                         ARRAY_SIZE(litekit_db_board_pins),
 198                                         "development board pins");
 199         imx31_add_imx_uart0(&uart_pdata);
 200         mxc_register_device(&mxcsdhc_device0, &mmc_pdata);
 201         imx31_add_spi_imx0(&spi0_pdata);
 202         platform_device_register(&litekit_led_device);
 203         mxc_register_device(&imx_wdt_device0, NULL);
 204         mxc_register_device(&imx_rtc_device0, NULL);
 205 }