arch/arm/mach-mx3/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  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/types.h>
  29 #include <linux/init.h>
  30 #include <linux/gpio.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/leds.h>
  33 #include <linux/platform_device.h>
  34
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37 #include <asm/mach/map.h>
  38
  39 #include <mach/hardware.h>
  40 #include <mach/common.h>
  41 #include <mach/imx-uart.h>
  42 #include <mach/iomux-mx3.h>
  43 #include <mach/board-mx31lite.h>
  44 #include <mach/mmc.h>
  45 #include <mach/spi.h>
  46
  47 #include "devices.h"
  48
  49 /*
  50  * This file contains board-specific initialization routines for the
  51  * LogicPD i.MX31 SOM-LV development board, aka 'LiteKit'.
  52  * If you design an own baseboard for the module, use this file as base
  53  * for support code.
  54  */
  55
  56 static unsigned int litekit_db_board_pins[] __initdata = {
  57         /* UART1 */
  58         MX31_PIN_CTS1__CTS1,
  59         MX31_PIN_RTS1__RTS1,
  60         MX31_PIN_TXD1__TXD1,
  61         MX31_PIN_RXD1__RXD1,
  62         /* SPI 0 */
  63         MX31_PIN_CSPI1_SCLK__SCLK,
  64         MX31_PIN_CSPI1_MOSI__MOSI,
  65         MX31_PIN_CSPI1_MISO__MISO,
  66         MX31_PIN_CSPI1_SPI_RDY__SPI_RDY,
  67         MX31_PIN_CSPI1_SS0__SS0,
  68         MX31_PIN_CSPI1_SS1__SS1,
  69         MX31_PIN_CSPI1_SS2__SS2,
  70 };
  71
  72 /* UART */
  73 static struct imxuart_platform_data uart_pdata __initdata = {
  74         .flags = IMXUART_HAVE_RTSCTS,
  75 };
  76
  77 /* MMC */
  78
  79 static int gpio_det, gpio_wp;
  80
  81 #define MMC_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
  82                         PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
  83
  84 static int mxc_mmc1_get_ro(struct device *dev)
  85 {
  86         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_LCS0));
  87 }
  88
  89 static int mxc_mmc1_init(struct device *dev,
  90                          irq_handler_t detect_irq, void *data)
  91 {
  92         int ret;
  93
  94         gpio_det = IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1);
  95         gpio_wp = IOMUX_TO_GPIO(MX31_PIN_GPIO1_6);
  96
  97         mxc_iomux_set_pad(MX31_PIN_SD1_DATA0, MMC_PAD_CFG);
  98         mxc_iomux_set_pad(MX31_PIN_SD1_DATA1, MMC_PAD_CFG);
  99         mxc_iomux_set_pad(MX31_PIN_SD1_DATA2, MMC_PAD_CFG);
 100         mxc_iomux_set_pad(MX31_PIN_SD1_DATA3, MMC_PAD_CFG);
 101         mxc_iomux_set_pad(MX31_PIN_SD1_CLK, MMC_PAD_CFG);
 102         mxc_iomux_set_pad(MX31_PIN_SD1_CMD, MMC_PAD_CFG);
 103
 104         ret = gpio_request(gpio_det, "MMC detect");
 105         if (ret)
 106                 return ret;
 107
 108         ret = gpio_request(gpio_wp, "MMC w/p");
 109         if (ret)
 110                 goto exit_free_det;
 111
 112         gpio_direction_input(gpio_det);
 113         gpio_direction_input(gpio_wp);
 114
 115         ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_DCD_DCE1), detect_irq,
 116                           IRQF_DISABLED | IRQF_TRIGGER_FALLING,
 117                           "MMC detect", data);
 118         if (ret)
 119                 goto exit_free_wp;
 120
 121         return 0;
 122
 123 exit_free_wp:
 124         gpio_free(gpio_wp);
 125
 126 exit_free_det:
 127         gpio_free(gpio_det);
 128
 129         return ret;
 130 }
 131
 132 static void mxc_mmc1_exit(struct device *dev, void *data)
 133 {
 134         gpio_free(gpio_det);
 135         gpio_free(gpio_wp);
 136         free_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO1_1), data);
 137 }
 138
 139 static struct imxmmc_platform_data mmc_pdata = {
 140         .get_ro  = mxc_mmc1_get_ro,
 141         .init      = mxc_mmc1_init,
 142         .exit      = mxc_mmc1_exit,
 143 };
 144
 145 /* SPI */
 146
 147 static int spi_internal_chipselect[] = {
 148         MXC_SPI_CS(0),
 149         MXC_SPI_CS(1),
 150         MXC_SPI_CS(2),
 151 };
 152
 153 static struct spi_imx_master spi0_pdata = {
 154         .chipselect     = spi_internal_chipselect,
 155         .num_chipselect = ARRAY_SIZE(spi_internal_chipselect),
 156 };
 157
 158 /* GPIO LEDs */
 159
 160 static struct gpio_led litekit_leds[] = {
 161         {
 162                 .name           = "GPIO0",
 163                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_COMPARE),
 164                 .active_low     = 1,
 165                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 166         },
 167         {
 168                 .name           = "GPIO1",
 169                 .gpio           = IOMUX_TO_GPIO(MX31_PIN_CAPTURE),
 170                 .active_low     = 1,
 171                 .default_state  = LEDS_GPIO_DEFSTATE_OFF,
 172         }
 173 };
 174
 175 static struct gpio_led_platform_data litekit_led_platform_data = {
 176         .leds           = litekit_leds,
 177         .num_leds       = ARRAY_SIZE(litekit_leds),
 178 };
 179
 180 static struct platform_device litekit_led_device = {
 181         .name   = "leds-gpio",
 182         .id     = -1,
 183         .dev    = {
 184                 .platform_data = &litekit_led_platform_data,
 185         },
 186 };
 187
 188 void __init mx31lite_db_init(void)
 189 {
 190         mxc_iomux_setup_multiple_pins(litekit_db_board_pins,
 191                                         ARRAY_SIZE(litekit_db_board_pins),
 192                                         "development board pins");
 193         mxc_register_device(&mxc_uart_device0, &uart_pdata);
 194         mxc_register_device(&mxcsdhc_device0, &mmc_pdata);
 195         mxc_register_device(&mxc_spi_device0, &spi0_pdata);
 196         platform_device_register(&litekit_led_device);
 197 }
 198