arch/arm/mach-mx3/mx31lilly-db.c

   1 /*
   2  *  LILLY-1131 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
  32 #include <asm/mach-types.h>
  33 #include <asm/mach/arch.h>
  34 #include <asm/mach/map.h>
  35
  36 #include <mach/hardware.h>
  37 #include <mach/common.h>
  38 #include <mach/imx-uart.h>
  39 #include <mach/iomux-mx3.h>
  40 #include <mach/board-mx31lilly.h>
  41 #include <mach/mmc.h>
  42
  43 #include "devices.h"
  44
  45 /*
  46  * This file contains board-specific initialization routines for the
  47  * LILLY-1131 development board. If you design an own baseboard for the
  48  * module, use this file as base for support code.
  49  */
  50
  51 static unsigned int lilly_db_board_pins[] __initdata = {
  52         MX31_PIN_CTS1__CTS1,
  53         MX31_PIN_RTS1__RTS1,
  54         MX31_PIN_TXD1__TXD1,
  55         MX31_PIN_RXD1__RXD1,
  56         MX31_PIN_SD1_DATA3__SD1_DATA3,
  57         MX31_PIN_SD1_DATA2__SD1_DATA2,
  58         MX31_PIN_SD1_DATA1__SD1_DATA1,
  59         MX31_PIN_SD1_DATA0__SD1_DATA0,
  60         MX31_PIN_SD1_CLK__SD1_CLK,
  61         MX31_PIN_SD1_CMD__SD1_CMD,
  62 };
  63
  64 /* UART */
  65 static struct imxuart_platform_data uart_pdata __initdata = {
  66         .flags = IMXUART_HAVE_RTSCTS,
  67 };
  68
  69 /* MMC support */
  70
  71 static int mxc_mmc1_get_ro(struct device *dev)
  72 {
  73         return gpio_get_value(IOMUX_TO_GPIO(MX31_PIN_LCS0));
  74 }
  75
  76 static int gpio_det, gpio_wp;
  77
  78 static int mxc_mmc1_init(struct device *dev,
  79                          irq_handler_t detect_irq, void *data)
  80 {
  81         int ret;
  82
  83         gpio_det = IOMUX_TO_GPIO(MX31_PIN_GPIO1_1);
  84         gpio_wp = IOMUX_TO_GPIO(MX31_PIN_LCS0);
  85
  86         ret = gpio_request(gpio_det, "MMC detect");
  87         if (ret)
  88                 return ret;
  89
  90         ret = gpio_request(gpio_wp, "MMC w/p");
  91         if (ret)
  92                 goto exit_free_det;
  93
  94         gpio_direction_input(gpio_det);
  95         gpio_direction_input(gpio_wp);
  96
  97         ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO1_1), detect_irq,
  98                           IRQF_DISABLED | IRQF_TRIGGER_FALLING,
  99                           "MMC detect", data);
 100         if (ret)
 101                 goto exit_free_wp;
 102
 103         return 0;
 104
 105 exit_free_wp:
 106         gpio_free(gpio_wp);
 107
 108 exit_free_det:
 109         gpio_free(gpio_det);
 110
 111         return ret;
 112 }
 113
 114 static void mxc_mmc1_exit(struct device *dev, void *data)
 115 {
 116         gpio_free(gpio_det);
 117         gpio_free(gpio_wp);
 118         free_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO1_1), data);
 119 }
 120
 121 static struct imxmmc_platform_data mmc_pdata = {
 122         .get_ro = mxc_mmc1_get_ro,
 123         .init   = mxc_mmc1_init,
 124         .exit   = mxc_mmc1_exit,
 125 };
 126
 127 void __init mx31lilly_db_init(void)
 128 {
 129         mxc_iomux_setup_multiple_pins(lilly_db_board_pins,
 130                                         ARRAY_SIZE(lilly_db_board_pins),
 131                                         "development board pins");
 132         mxc_register_device(&mxc_uart_device0, &uart_pdata);
 133         mxc_register_device(&mxcsdhc_device0, &mmc_pdata);
 134 }
 135