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         /* 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 */
  71 static const struct imxuart_platform_data uart_pdata __initconst = {
  72         .flags = IMXUART_HAVE_RTSCTS,
  73 };
  74
  75 /* MMC */
  76
  77 static 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
  82 static int mxc_mmc1_get_ro(struct device *dev)
  83 {
  84         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_GPIO1_6));
  85 }
  86
  87 static 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
 127 exit_free_wp:
 128         gpio_free(gpio_wp);
 129
 130 exit_free_det:
 131         gpio_free(gpio_det);
 132
 133         return ret;
 134 }
 135
 136 static 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
 143 static 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
 151 static int spi_internal_chipselect[] = {
 152         MXC_SPI_CS(0),
 153         MXC_SPI_CS(1),
 154         MXC_SPI_CS(2),
 155 };
 156
 157 static 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
 164 static 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
 179 static 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
 185 void __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 }