arch/arm/mach-mx2/eukrea_mbimx27-baseboard.c

   1 /*
   2  * Copyright (C) 2009 Eric Benard - eric@eukrea.com
   3  *
   4  * Based on pcm970-baseboard.c which is :
   5  * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  19  * MA 02110-1301, USA.
  20  */
  21
  22 #include <linux/gpio.h>
  23 #include <linux/irq.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/spi/spi.h>
  26 #include <linux/spi/ads7846.h>
  27
  28 #include <asm/mach/arch.h>
  29
  30 #include <mach/common.h>
  31 #include <mach/iomux.h>
  32 #include <mach/imxfb.h>
  33 #include <mach/hardware.h>
  34 #include <mach/mmc.h>
  35 #include <mach/imx-uart.h>
  36
  37 #include "devices.h"
  38
  39 static int eukrea_mbimx27_pins[] = {
  40         /* UART2 */
  41         PE3_PF_UART2_CTS,
  42         PE4_PF_UART2_RTS,
  43         PE6_PF_UART2_TXD,
  44         PE7_PF_UART2_RXD,
  45         /* UART3 */
  46         PE8_PF_UART3_TXD,
  47         PE9_PF_UART3_RXD,
  48         PE10_PF_UART3_CTS,
  49         PE11_PF_UART3_RTS,
  50         /* UART4 */
  51         PB26_AF_UART4_RTS,
  52         PB28_AF_UART4_TXD,
  53         PB29_AF_UART4_CTS,
  54         PB31_AF_UART4_RXD,
  55         /* SDHC1*/
  56         PE18_PF_SD1_D0,
  57         PE19_PF_SD1_D1,
  58         PE20_PF_SD1_D2,
  59         PE21_PF_SD1_D3,
  60         PE22_PF_SD1_CMD,
  61         PE23_PF_SD1_CLK,
  62         /* display */
  63         PA5_PF_LSCLK,
  64         PA6_PF_LD0,
  65         PA7_PF_LD1,
  66         PA8_PF_LD2,
  67         PA9_PF_LD3,
  68         PA10_PF_LD4,
  69         PA11_PF_LD5,
  70         PA12_PF_LD6,
  71         PA13_PF_LD7,
  72         PA14_PF_LD8,
  73         PA15_PF_LD9,
  74         PA16_PF_LD10,
  75         PA17_PF_LD11,
  76         PA18_PF_LD12,
  77         PA19_PF_LD13,
  78         PA20_PF_LD14,
  79         PA21_PF_LD15,
  80         PA22_PF_LD16,
  81         PA23_PF_LD17,
  82         PA28_PF_HSYNC,
  83         PA29_PF_VSYNC,
  84         PA30_PF_CONTRAST,
  85         PA31_PF_OE_ACD,
  86         /* SPI1 */
  87         PD28_PF_CSPI1_SS0,
  88         PD29_PF_CSPI1_SCLK,
  89         PD30_PF_CSPI1_MISO,
  90         PD31_PF_CSPI1_MOSI,
  91 };
  92
  93 static struct gpio_led gpio_leds[] = {
  94         {
  95                 .name                   = "led1",
  96                 .default_trigger        = "heartbeat",
  97                 .active_low             = 1,
  98                 .gpio                   = GPIO_PORTF | 16,
  99         },
 100         {
 101                 .name                   = "led2",
 102                 .default_trigger        = "none",
 103                 .active_low             = 1,
 104                 .gpio                   = GPIO_PORTF | 19,
 105         },
 106         {
 107                 .name                   = "backlight",
 108                 .default_trigger        = "backlight",
 109                 .active_low             = 0,
 110                 .gpio                   = GPIO_PORTE | 5,
 111         },
 112 };
 113
 114 static struct gpio_led_platform_data gpio_led_info = {
 115         .leds           = gpio_leds,
 116         .num_leds       = ARRAY_SIZE(gpio_leds),
 117 };
 118
 119 static struct platform_device leds_gpio = {
 120         .name   = "leds-gpio",
 121         .id     = -1,
 122         .dev    = {
 123                 .platform_data  = &gpio_led_info,
 124         },
 125 };
 126
 127 static struct imx_fb_videomode eukrea_mbimx27_modes[] = {
 128         {
 129                 .mode = {
 130                         .name           = "CMO-QGVA",
 131                         .refresh        = 60,
 132                         .xres           = 320,
 133                         .yres           = 240,
 134                         .pixclock       = 156000,
 135                         .hsync_len      = 30,
 136                         .left_margin    = 38,
 137                         .right_margin   = 20,
 138                         .vsync_len      = 3,
 139                         .upper_margin   = 15,
 140                         .lower_margin   = 4,
 141                 },
 142                 .pcr            = 0xFAD08B80,
 143                 .bpp            = 16,
 144         },
 145 };
 146
 147 static struct imx_fb_platform_data eukrea_mbimx27_fb_data = {
 148         .mode = eukrea_mbimx27_modes,
 149         .num_modes = ARRAY_SIZE(eukrea_mbimx27_modes),
 150
 151         .pwmr           = 0x00A903FF,
 152         .lscr1          = 0x00120300,
 153         .dmacr          = 0x00040060,
 154 };
 155
 156 static struct imxuart_platform_data uart_pdata[] = {
 157         {
 158                 .flags = IMXUART_HAVE_RTSCTS,
 159         },
 160         {
 161                 .flags = IMXUART_HAVE_RTSCTS,
 162         },
 163 };
 164
 165 #if defined(CONFIG_TOUCHSCREEN_ADS7846)
 166         || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
 167
 168 #define ADS7846_PENDOWN (GPIO_PORTD | 25)
 169
 170 static void ads7846_dev_init(void)
 171 {
 172         if (gpio_request(ADS7846_PENDOWN, "ADS7846 pendown") < 0) {
 173                 printk(KERN_ERR "can't get ads746 pen down GPIO\n");
 174                 return;
 175         }
 176
 177         gpio_direction_input(ADS7846_PENDOWN);
 178 }
 179
 180 static int ads7846_get_pendown_state(void)
 181 {
 182         return !gpio_get_value(ADS7846_PENDOWN);
 183 }
 184
 185 static struct ads7846_platform_data ads7846_config __initdata = {
 186         .get_pendown_state      = ads7846_get_pendown_state,
 187         .keep_vref_on           = 1,
 188 };
 189
 190 static struct spi_board_info eukrea_mbimx27_spi_board_info[] __initdata = {
 191         [0] = {
 192                 .modalias       = "ads7846",
 193                 .bus_num        = 0,
 194                 .chip_select    = 0,
 195                 .max_speed_hz   = 1500000,
 196                 .irq            = IRQ_GPIOD(25),
 197                 .platform_data  = &ads7846_config,
 198                 .mode           = SPI_MODE_2,
 199         },
 200 };
 201
 202 static int eukrea_mbimx27_spi_cs[] = {GPIO_PORTD | 28};
 203
 204 static struct spi_imx_master eukrea_mbimx27_spi_0_data = {
 205         .chipselect     = eukrea_mbimx27_spi_cs,
 206         .num_chipselect = ARRAY_SIZE(eukrea_mbimx27_spi_cs),
 207 };
 208 #endif
 209
 210 static struct platform_device *platform_devices[] __initdata = {
 211         &leds_gpio,
 212 };
 213
 214 /*
 215  * system init for baseboard usage. Will be called by cpuimx27 init.
 216  *
 217  * Add platform devices present on this baseboard and init
 218  * them from CPU side as far as required to use them later on
 219  */
 220 void __init eukrea_mbimx27_baseboard_init(void)
 221 {
 222         mxc_gpio_setup_multiple_pins(eukrea_mbimx27_pins,
 223                 ARRAY_SIZE(eukrea_mbimx27_pins), "MBIMX27");
 224
 225         mxc_register_device(&mxc_uart_device1, &uart_pdata[0]);
 226         mxc_register_device(&mxc_uart_device2, &uart_pdata[1]);
 227
 228         mxc_register_device(&mxc_fb_device, &eukrea_mbimx27_fb_data);
 229         mxc_register_device(&mxc_sdhc_device0, NULL);
 230
 231 #if defined(CONFIG_TOUCHSCREEN_ADS7846)
 232         || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
 233         /* SPI and ADS7846 Touchscreen controler init */
 234         mxc_gpio_mode(GPIO_PORTD | 28 | GPIO_GPIO | GPIO_OUT);
 235         mxc_gpio_mode(GPIO_PORTD | 25 | GPIO_GPIO | GPIO_IN);
 236         mxc_register_device(&mxc_spi_device0, &eukrea_mbimx27_spi_0_data);
 237         spi_register_board_info(eukrea_mbimx27_spi_board_info,
 238                         ARRAY_SIZE(eukrea_mbimx27_spi_board_info));
 239         ads7846_dev_init();
 240 #endif
 241
 242         /* Leds configuration */
 243         mxc_gpio_mode(GPIO_PORTF | 16 | GPIO_GPIO | GPIO_OUT);
 244         mxc_gpio_mode(GPIO_PORTF | 19 | GPIO_GPIO | GPIO_OUT);
 245         /* Backlight */
 246         mxc_gpio_mode(GPIO_PORTE | 5 | GPIO_GPIO | GPIO_OUT);
 247
 248         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
 249 }