LXR linux/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 "board-mx31lite.h"
  35#include "common.h"
  36#include "devices-imx31.h"
  37#include "hardware.h"
  38#include "iomux-mx3.h"
  39
  40/*
  41 * This file contains board-specific initialization routines for the
  42 * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
  43 * If you design an own baseboard for the module, use this file as base
  44 * for support code.
  45 */
  46
  47static unsigned int litekit_db_board_pins[] __initdata = {
  48        /* SDHC1 */
  49        MX31_PIN_SD1_DATA0__SD1_DATA0,
  50        MX31_PIN_SD1_DATA1__SD1_DATA1,
  51        MX31_PIN_SD1_DATA2__SD1_DATA2,
  52        MX31_PIN_SD1_DATA3__SD1_DATA3,
  53        MX31_PIN_SD1_CLK__SD1_CLK,
  54        MX31_PIN_SD1_CMD__SD1_CMD,
  55};
  56
  57/* MMC */
  58
  59static int gpio_det, gpio_wp;
  60
  61#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  62                     PAD_CTL_ODE_CMOS)
  63
  64static int mxc_mmc1_get_ro(struct device *dev)
  65{
  66        return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  67}
  68
  69static int mxc_mmc1_init(struct device *dev,
  70                         irq_handler_t detect_irq, void *data)
  71{
  72        int ret;
  73
  74        gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  75        gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  76
  77        mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
  78                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  79        mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
  80                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  81        mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
  82                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  83        mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
  84                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  85        mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
  86                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  87        mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
  88
  89        ret = gpio_request(gpio_det, "MMC detect");
  90        if (ret)
  91                return ret;
  92
  93        ret = gpio_request(gpio_wp, "MMC w/p");
  94        if (ret)
  95                goto exit_free_det;
  96
  97        gpio_direction_input(gpio_det);
  98        gpio_direction_input(gpio_wp);
  99
 100        ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
 101                          detect_irq,
 102                          IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 103                          "MMC detect", data);
 104        if (ret)
 105                goto exit_free_wp;
 106
 107        return 0;
 108
 109exit_free_wp:
 110        gpio_free(gpio_wp);
 111
 112exit_free_det:
 113        gpio_free(gpio_det);
 114
 115        return ret;
 116}
 117
 118static void mxc_mmc1_exit(struct device *dev, void *data)
 119{
 120        gpio_free(gpio_det);
 121        gpio_free(gpio_wp);
 122        free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
 123}
 124
 125static const struct imxmmc_platform_data mmc_pdata __initconst = {
 126        .get_ro  = mxc_mmc1_get_ro,
 127        .init      = mxc_mmc1_init,
 128        .exit      = mxc_mmc1_exit,
 129};
 130
 131/* GPIO LEDs */
 132
 133static const struct gpio_led litekit_leds[] __initconst = {
 134        {
 135                .name           = "GPIO0",
 136                .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 137                .active_low     = 1,
 138                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 139        },
 140        {
 141                .name           = "GPIO1",
 142                .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 143                .active_low     = 1,
 144                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 145        }
 146};
 147
 148static const struct gpio_led_platform_data
 149                litekit_led_platform_data __initconst = {
 150        .leds           = litekit_leds,
 151        .num_leds       = ARRAY_SIZE(litekit_leds),
 152};
 153
 154void __init mx31lite_db_init(void)
 155{
 156        mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 157                                        ARRAY_SIZE(litekit_db_board_pins),
 158                                        "development board pins");
 159        imx31_add_mxc_mmc(0, &mmc_pdata);
 160        gpio_led_register_device(-1, &litekit_led_platform_data);
 161        imx31_add_imx2_wdt();
 162        imx31_add_mxc_rtc();
 163}
 164