arch/arm/mach-mx3/mx31moboard.c

   1 /*
   2  *  Copyright (C) 2008 Valentin Longchamp, EPFL Mobots group
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include <linux/gpio.h>
  20 #include <linux/init.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/memory.h>
  23 #include <linux/mtd/physmap.h>
  24 #include <linux/mtd/partitions.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/types.h>
  27
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/time.h>
  31 #include <asm/mach/map.h>
  32 #include <mach/board-mx31moboard.h>
  33 #include <mach/common.h>
  34 #include <mach/hardware.h>
  35 #include <mach/imx-uart.h>
  36 #include <mach/iomux-mx3.h>
  37 #include <mach/i2c.h>
  38 #include <mach/mmc.h>
  39
  40 #include "devices.h"
  41
  42 static unsigned int moboard_pins[] = {
  43         /* UART0 */
  44         MX31_PIN_CTS1__CTS1, MX31_PIN_RTS1__RTS1,
  45         MX31_PIN_TXD1__TXD1, MX31_PIN_RXD1__RXD1,
  46         /* UART4 */
  47         MX31_PIN_PC_RST__CTS5, MX31_PIN_PC_VS2__RTS5,
  48         MX31_PIN_PC_BVD2__TXD5, MX31_PIN_PC_BVD1__RXD5,
  49         /* I2C0 */
  50         MX31_PIN_I2C_DAT__I2C1_SDA, MX31_PIN_I2C_CLK__I2C1_SCL,
  51         /* I2C1 */
  52         MX31_PIN_DCD_DTE1__I2C2_SDA, MX31_PIN_RI_DTE1__I2C2_SCL,
  53         /* SDHC1 */
  54         MX31_PIN_SD1_DATA3__SD1_DATA3, MX31_PIN_SD1_DATA2__SD1_DATA2,
  55         MX31_PIN_SD1_DATA1__SD1_DATA1, MX31_PIN_SD1_DATA0__SD1_DATA0,
  56         MX31_PIN_SD1_CLK__SD1_CLK, MX31_PIN_SD1_CMD__SD1_CMD,
  57         MX31_PIN_ATA_CS0__GPIO3_26, MX31_PIN_ATA_CS1__GPIO3_27,
  58 };
  59
  60 static struct physmap_flash_data mx31moboard_flash_data = {
  61         .width          = 2,
  62 };
  63
  64 static struct resource mx31moboard_flash_resource = {
  65         .start  = 0xa0000000,
  66         .end    = 0xa1ffffff,
  67         .flags  = IORESOURCE_MEM,
  68 };
  69
  70 static struct platform_device mx31moboard_flash = {
  71         .name   = "physmap-flash",
  72         .id     = 0,
  73         .dev    = {
  74                 .platform_data  = &mx31moboard_flash_data,
  75         },
  76         .resource = &mx31moboard_flash_resource,
  77         .num_resources = 1,
  78 };
  79
  80 static struct imxuart_platform_data uart_pdata = {
  81         .flags = IMXUART_HAVE_RTSCTS,
  82 };
  83
  84 static struct imxi2c_platform_data moboard_i2c0_pdata = {
  85         .bitrate = 400000,
  86 };
  87
  88 static struct imxi2c_platform_data moboard_i2c1_pdata = {
  89         .bitrate = 100000,
  90 };
  91
  92 #define SDHC1_CD IOMUX_TO_GPIO(MX31_PIN_ATA_CS0)
  93 #define SDHC1_WP IOMUX_TO_GPIO(MX31_PIN_ATA_CS1)
  94
  95 static int moboard_sdhc1_get_ro(struct device *dev)
  96 {
  97         return !gpio_get_value(SDHC1_WP);
  98 }
  99
 100 static int moboard_sdhc1_init(struct device *dev, irq_handler_t detect_irq,
 101                 void *data)
 102 {
 103         int ret;
 104
 105         ret = gpio_request(SDHC1_CD, "sdhc-detect");
 106         if (ret)
 107                 return ret;
 108
 109         gpio_direction_input(SDHC1_CD);
 110
 111         ret = gpio_request(SDHC1_WP, "sdhc-wp");
 112         if (ret)
 113                 goto err_gpio_free;
 114         gpio_direction_input(SDHC1_WP);
 115
 116         ret = request_irq(gpio_to_irq(SDHC1_CD), detect_irq,
 117                 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
 118                 "sdhc1-card-detect", data);
 119         if (ret)
 120                 goto err_gpio_free_2;
 121
 122         return 0;
 123
 124 err_gpio_free_2:
 125         gpio_free(SDHC1_WP);
 126 err_gpio_free:
 127         gpio_free(SDHC1_CD);
 128
 129         return ret;
 130 }
 131
 132 static void moboard_sdhc1_exit(struct device *dev, void *data)
 133 {
 134         free_irq(gpio_to_irq(SDHC1_CD), data);
 135         gpio_free(SDHC1_WP);
 136         gpio_free(SDHC1_CD);
 137 }
 138
 139 static struct imxmmc_platform_data sdhc1_pdata = {
 140         .get_ro = moboard_sdhc1_get_ro,
 141         .init   = moboard_sdhc1_init,
 142         .exit   = moboard_sdhc1_exit,
 143 };
 144
 145 static struct platform_device *devices[] __initdata = {
 146         &mx31moboard_flash,
 147 };
 148
 149 static int mx31moboard_baseboard;
 150 core_param(mx31moboard_baseboard, mx31moboard_baseboard, int, 0444);
 151
 152 /*
 153  * Board specific initialization.
 154  */
 155 static void __init mxc_board_init(void)
 156 {
 157         mxc_iomux_setup_multiple_pins(moboard_pins, ARRAY_SIZE(moboard_pins),
 158                 "moboard");
 159
 160         platform_add_devices(devices, ARRAY_SIZE(devices));
 161
 162         mxc_register_device(&mxc_uart_device0, &uart_pdata);
 163         mxc_register_device(&mxc_uart_device4, &uart_pdata);
 164
 165         mxc_register_device(&mxc_i2c_device0, &moboard_i2c0_pdata);
 166         mxc_register_device(&mxc_i2c_device1, &moboard_i2c1_pdata);
 167
 168         mxc_register_device(&mxcsdhc_device0, &sdhc1_pdata);
 169
 170         switch (mx31moboard_baseboard) {
 171         case MX31NOBOARD:
 172                 break;
 173         case MX31DEVBOARD:
 174                 mx31moboard_devboard_init();
 175                 break;
 176         case MX31MARXBOT:
 177                 mx31moboard_marxbot_init();
 178                 break;
 179         default:
 180                 printk(KERN_ERR "Illegal mx31moboard_baseboard type %d\n",
 181                         mx31moboard_baseboard);
 182         }
 183 }
 184
 185 static void __init mx31moboard_timer_init(void)
 186 {
 187         mx31_clocks_init(26000000);
 188 }
 189
 190 struct sys_timer mx31moboard_timer = {
 191         .init   = mx31moboard_timer_init,
 192 };
 193
 194 MACHINE_START(MX31MOBOARD, "EPFL Mobots mx31moboard")
 195         /* Maintainer: Valentin Longchamp, EPFL Mobots group */
 196         .phys_io        = AIPS1_BASE_ADDR,
 197         .io_pg_offst    = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
 198         .boot_params    = PHYS_OFFSET + 0x100,
 199         .map_io         = mx31_map_io,
 200         .init_irq       = mxc_init_irq,
 201         .init_machine   = mxc_board_init,
 202         .timer          = &mx31moboard_timer,
 203 MACHINE_END
 204