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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  LogicPD i.MX31 SOM-LV development board support
   4 *
   5 *    Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
   6 *
   7 *  based on code for other MX31 boards,
   8 *
   9 *    Copyright 2005-2007 Freescale Semiconductor
  10 *    Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
  11 *    Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
  12 */
  13
  14#include <linux/kernel.h>
  15#include <linux/types.h>
  16#include <linux/init.h>
  17#include <linux/gpio.h>
  18#include <linux/leds.h>
  19#include <linux/platform_device.h>
  20
  21#include <asm/mach-types.h>
  22#include <asm/mach/arch.h>
  23#include <asm/mach/map.h>
  24
  25#include "board-mx31lite.h"
  26#include "common.h"
  27#include "devices-imx31.h"
  28#include "hardware.h"
  29#include "iomux-mx3.h"
  30
  31/*
  32 * This file contains board-specific initialization routines for the
  33 * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
  34 * If you design an own baseboard for the module, use this file as base
  35 * for support code.
  36 */
  37
  38static unsigned int litekit_db_board_pins[] __initdata = {
  39        /* SDHC1 */
  40        MX31_PIN_SD1_DATA0__SD1_DATA0,
  41        MX31_PIN_SD1_DATA1__SD1_DATA1,
  42        MX31_PIN_SD1_DATA2__SD1_DATA2,
  43        MX31_PIN_SD1_DATA3__SD1_DATA3,
  44        MX31_PIN_SD1_CLK__SD1_CLK,
  45        MX31_PIN_SD1_CMD__SD1_CMD,
  46};
  47
  48/* MMC */
  49
  50static int gpio_det, gpio_wp;
  51
  52#define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  53                     PAD_CTL_ODE_CMOS)
  54
  55static int mxc_mmc1_get_ro(struct device *dev)
  56{
  57        return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  58}
  59
  60static int mxc_mmc1_init(struct device *dev,
  61                         irq_handler_t detect_irq, void *data)
  62{
  63        int ret;
  64
  65        gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  66        gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  67
  68        mxc_iomux_set_pad(MX31_PIN_SD1_DATA0,
  69                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  70        mxc_iomux_set_pad(MX31_PIN_SD1_DATA1,
  71                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  72        mxc_iomux_set_pad(MX31_PIN_SD1_DATA2,
  73                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  74        mxc_iomux_set_pad(MX31_PIN_SD1_DATA3,
  75                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  76        mxc_iomux_set_pad(MX31_PIN_SD1_CMD,
  77                          MMC_PAD_CFG | PAD_CTL_PUE_PUD | PAD_CTL_100K_PU);
  78        mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
  79
  80        ret = gpio_request(gpio_det, "MMC detect");
  81        if (ret)
  82                return ret;
  83
  84        ret = gpio_request(gpio_wp, "MMC w/p");
  85        if (ret)
  86                goto exit_free_det;
  87
  88        gpio_direction_input(gpio_det);
  89        gpio_direction_input(gpio_wp);
  90
  91        ret = request_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)),
  92                          detect_irq,
  93                          IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
  94                          "MMC detect", data);
  95        if (ret)
  96                goto exit_free_wp;
  97
  98        return 0;
  99
 100exit_free_wp:
 101        gpio_free(gpio_wp);
 102
 103exit_free_det:
 104        gpio_free(gpio_det);
 105
 106        return ret;
 107}
 108
 109static void mxc_mmc1_exit(struct device *dev, void *data)
 110{
 111        gpio_free(gpio_det);
 112        gpio_free(gpio_wp);
 113        free_irq(gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)), data);
 114}
 115
 116static const struct imxmmc_platform_data mmc_pdata __initconst = {
 117        .get_ro  = mxc_mmc1_get_ro,
 118        .init      = mxc_mmc1_init,
 119        .exit      = mxc_mmc1_exit,
 120};
 121
 122/* GPIO LEDs */
 123
 124static const struct gpio_led litekit_leds[] __initconst = {
 125        {
 126                .name           = "GPIO0",
 127                .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 128                .active_low     = 1,
 129                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 130        },
 131        {
 132                .name           = "GPIO1",
 133                .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 134                .active_low     = 1,
 135                .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 136        }
 137};
 138
 139static const struct gpio_led_platform_data
 140                litekit_led_platform_data __initconst = {
 141        .leds           = litekit_leds,
 142        .num_leds       = ARRAY_SIZE(litekit_leds),
 143};
 144
 145void __init mx31lite_db_init(void)
 146{
 147        mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 148                                        ARRAY_SIZE(litekit_db_board_pins),
 149                                        "development board pins");
 150        imx31_add_mxc_mmc(0, &mmc_pdata);
 151        gpio_led_register_device(-1, &litekit_led_platform_data);
 152        imx31_add_imx2_wdt();
 153        imx31_add_mxc_rtc();
 154}
 155