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        /* UART1 */
  49        MX31_PIN_CTS1__CTS1,
  50        MX31_PIN_RTS1__RTS1,
  51        MX31_PIN_TXD1__TXD1,
  52        MX31_PIN_RXD1__RXD1,
  53        /* SPI 0 */
  54        MX31_PIN_CSPI1_SCLK__SCLK,
  55        MX31_PIN_CSPI1_MOSI__MOSI,
  56        MX31_PIN_CSPI1_MISO__MISO,
  57        MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
  58        MX31_PIN_CSPI1_SS0__SS0,
  59        MX31_PIN_CSPI1_SS1__SS1,
  60        MX31_PIN_CSPI1_SS2__SS2,
  61        /* SDHC1 */
  62        MX31_PIN_SD1_DATA0__SD1_DATA0,
  63        MX31_PIN_SD1_DATA1__SD1_DATA1,
  64        MX31_PIN_SD1_DATA2__SD1_DATA2,
  65        MX31_PIN_SD1_DATA3__SD1_DATA3,
  66        MX31_PIN_SD1_CLK__SD1_CLK,
  67        MX31_PIN_SD1_CMD__SD1_CMD,
  68};
  69
  70/* UART */
  71static const struct imxuart_platform_data uart_pdata __initconst = {
  72        .flags = IMXUART_HAVE_RTSCTS,
  73};
  74
  75/* MMC */
  76
  77static int gpio_det, gpio_wp;
  78
  79#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  80                     PAD_CTL_ODE_CMOS)
  81
  82static int mxc_mmc1_get_ro(struct device *dev)
  83{
  84        return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  85}
  86
  87static int mxc_mmc1_init(struct device *dev,
  88                         irq_handler_t detect_irq, void *data)
  89{
  90        int ret;
  91
  92        gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  93        gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  94
  95        mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
  96                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  97        mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
  98                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  99        mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
 100                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 101        mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
 102                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 103        mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
 104                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
 105        mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
 106
 107        ret = gpio_request(gpio_det, "MMC detect");
 108        if (ret)
 109                return ret;
 110
 111        ret = gpio_request(gpio_wp, "MMC w/p");
 112        if (ret)
 113                goto exit_free_det;
 114
 115        gpio_direction_input(gpio_det);
 116        gpio_direction_input(gpio_wp);
 117
 118        ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
 119                          detect_irq,
 120                          IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 121                          "MMC detect", data);
 122        if (ret)
 123                goto exit_free_wp;
 124
 125        return 0;
 126
 127exit_free_wp:
 128        gpio_free(gpio_wp);
 129
 130exit_free_det:
 131        gpio_free(gpio_det);
 132
 133        return ret;
 134}
 135
 136static void mxc_mmc1_exit(struct device *dev, void *data)
 137{
 138        gpio_free(gpio_det);
 139        gpio_free(gpio_wp);
 140        free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
 141}
 142
 143static const struct imxmmc_platform_data mmc_pdata __initconst = {
 144        .get_ro  = mxc_mmc1_get_ro,
 145        .init      = mxc_mmc1_init,
 146        .exit      = mxc_mmc1_exit,
 147};
 148
 149/* SPI */
 150
 151static int spi_internal_chipselect[] = {
 152        MXC_SPI_CS(0),
 153        MXC_SPI_CS(1),
 154        MXC_SPI_CS(2),
 155};
 156
 157static const struct spi_imx_master spi0_pdata __initconst = {
 158        .chipselect     = spi_internal_chipselect,
 159        .num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
 160};
 161
 162/* GPIO LEDs */
 163
 164static const struct gpio_led litekit_leds[] __initconst = {
 165        {
 166                .name           = "GPIO0",
 167                .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 168                .active_low     = 1,
 169                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 170        },
 171        {
 172                .name           = "GPIO1",
 173                .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 174                .active_low     = 1,
 175                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 176        }
 177};
 178
 179static const struct gpio_led_platform_data
 180                litekit_led_platform_data __initconst = {
 181        .leds           = litekit_leds,
 182        .num_leds       = ARRAY_SIZE(litekit_leds),
 183};
 184
 185void __init mx31lite_db_init(void)
 186{
 187        mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 188                                        ARRAY_SIZE(litekit_db_board_pins),
 189                                        "development board pins");
 190        imx31_add_imx_uart0(&uart_pdata);
 191        imx31_add_mxc_mmc(0, &mmc_pdata);
 192        imx31_add_spi_imx0(&spi0_pdata);
 193        gpio_led_register_device(-1, &litekit_led_platform_data);
 194        imx31_add_imx2_wdt();
 195        imx31_add_mxc_rtc();
 196}
 197