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
  47 static 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
  59 static 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
  64 static int mxc_mmc1_get_ro(struct device *dev)
  65 {
  66         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  67 }
  68
  69 static 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
 109 exit_free_wp:
 110         gpio_free(gpio_wp);
 111
 112 exit_free_det:
 113         gpio_free(gpio_det);
 114
 115         return ret;
 116 }
 117
 118 static 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
 125 static 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
 133 static 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
 148 static 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
 154 void __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 }