root/arch/arm/mach-imx/mx31lite-db.c

DEFINITIONS

1. mxc_mmc1_get_ro
2. mxc_mmc1_init
3. mxc_mmc1_exit
4. mx31lite_db_init

   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 
  38 static 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 
  50 static 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 
  55 static int mxc_mmc1_get_ro(struct device *dev)
  56 {
  57         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  58 }
  59 
  60 static 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 
 100 exit_free_wp:
 101         gpio_free(gpio_wp);
 102 
 103 exit_free_det:
 104         gpio_free(gpio_det);
 105 
 106         return ret;
 107 }
 108 
 109 static 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 
 116 static 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 
 124 static 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 
 139 static 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 
 145 void __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 }