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eukrea_mbimx27-baseboard.c

/*
 * Copyright (C) 2009 Eric Benard - eric@eukrea.com
 *
 * Based on pcm970-baseboard.c which is :
 * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>

#include <asm/mach/arch.h>

#include <mach/common.h>
#include <mach/iomux.h>
#include <mach/imxfb.h>
#include <mach/hardware.h>
#include <mach/mmc.h>
#include <mach/imx-uart.h>

#include "devices.h"

static int eukrea_mbimx27_pins[] = {
      /* UART2 */
      PE3_PF_UART2_CTS,
      PE4_PF_UART2_RTS,
      PE6_PF_UART2_TXD,
      PE7_PF_UART2_RXD,
      /* UART3 */
      PE8_PF_UART3_TXD,
      PE9_PF_UART3_RXD,
      PE10_PF_UART3_CTS,
      PE11_PF_UART3_RTS,
      /* UART4 */
      PB26_AF_UART4_RTS,
      PB28_AF_UART4_TXD,
      PB29_AF_UART4_CTS,
      PB31_AF_UART4_RXD,
      /* SDHC1*/
      PE18_PF_SD1_D0,
      PE19_PF_SD1_D1,
      PE20_PF_SD1_D2,
      PE21_PF_SD1_D3,
      PE22_PF_SD1_CMD,
      PE23_PF_SD1_CLK,
      /* display */
      PA5_PF_LSCLK,
      PA6_PF_LD0,
      PA7_PF_LD1,
      PA8_PF_LD2,
      PA9_PF_LD3,
      PA10_PF_LD4,
      PA11_PF_LD5,
      PA12_PF_LD6,
      PA13_PF_LD7,
      PA14_PF_LD8,
      PA15_PF_LD9,
      PA16_PF_LD10,
      PA17_PF_LD11,
      PA18_PF_LD12,
      PA19_PF_LD13,
      PA20_PF_LD14,
      PA21_PF_LD15,
      PA22_PF_LD16,
      PA23_PF_LD17,
      PA28_PF_HSYNC,
      PA29_PF_VSYNC,
      PA30_PF_CONTRAST,
      PA31_PF_OE_ACD,
      /* SPI1 */
      PD28_PF_CSPI1_SS0,
      PD29_PF_CSPI1_SCLK,
      PD30_PF_CSPI1_MISO,
      PD31_PF_CSPI1_MOSI,
};

static struct gpio_led gpio_leds[] = {
      {
            .name             = "led1",
            .default_trigger  = "heartbeat",
            .active_low       = 1,
            .gpio             = GPIO_PORTF | 16,
      },
      {
            .name             = "led2",
            .default_trigger  = "none",
            .active_low       = 1,
            .gpio             = GPIO_PORTF | 19,
      },
      {
            .name             = "backlight",
            .default_trigger  = "backlight",
            .active_low       = 0,
            .gpio             = GPIO_PORTE | 5,
      },
};

static struct gpio_led_platform_data gpio_led_info = {
      .leds       = gpio_leds,
      .num_leds   = ARRAY_SIZE(gpio_leds),
};

static struct platform_device leds_gpio = {
      .name = "leds-gpio",
      .id   = -1,
      .dev  = {
            .platform_data    = &gpio_led_info,
      },
};

static struct imx_fb_videomode eukrea_mbimx27_modes[] = {
      {
            .mode = {
                  .name       = "CMO-QGVA",
                  .refresh    = 60,
                  .xres       = 320,
                  .yres       = 240,
                  .pixclock   = 156000,
                  .hsync_len  = 30,
                  .left_margin      = 38,
                  .right_margin     = 20,
                  .vsync_len  = 3,
                  .upper_margin     = 15,
                  .lower_margin     = 4,
            },
            .pcr        = 0xFAD08B80,
            .bpp        = 16,
      },
};

static struct imx_fb_platform_data eukrea_mbimx27_fb_data = {
      .mode = eukrea_mbimx27_modes,
      .num_modes = ARRAY_SIZE(eukrea_mbimx27_modes),

      .pwmr       = 0x00A903FF,
      .lscr1            = 0x00120300,
      .dmacr            = 0x00040060,
};

static struct imxuart_platform_data uart_pdata[] = {
      {
            .flags = IMXUART_HAVE_RTSCTS,
      },
      {
            .flags = IMXUART_HAVE_RTSCTS,
      },
};

#if defined(CONFIG_TOUCHSCREEN_ADS7846)
      || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)

#define ADS7846_PENDOWN (GPIO_PORTD | 25)

static void ads7846_dev_init(void)
{
      if (gpio_request(ADS7846_PENDOWN, "ADS7846 pendown") < 0) {
            printk(KERN_ERR "can't get ads746 pen down GPIO\n");
            return;
      }

      gpio_direction_input(ADS7846_PENDOWN);
}

static int ads7846_get_pendown_state(void)
{
      return !gpio_get_value(ADS7846_PENDOWN);
}

static struct ads7846_platform_data ads7846_config __initdata = {
      .get_pendown_state      = ads7846_get_pendown_state,
      .keep_vref_on           = 1,
};

static struct spi_board_info eukrea_mbimx27_spi_board_info[] __initdata = {
      [0] = {
            .modalias   = "ads7846",
            .bus_num    = 0,
            .chip_select      = 0,
            .max_speed_hz     = 1500000,
            .irq        = IRQ_GPIOD(25),
            .platform_data    = &ads7846_config,
            .mode           = SPI_MODE_2,
      },
};

static int eukrea_mbimx27_spi_cs[] = {GPIO_PORTD | 28};

static struct spi_imx_master eukrea_mbimx27_spi_0_data = {
      .chipselect = eukrea_mbimx27_spi_cs,
      .num_chipselect = ARRAY_SIZE(eukrea_mbimx27_spi_cs),
};
#endif

static struct platform_device *platform_devices[] __initdata = {
      &leds_gpio,
};

/*
 * system init for baseboard usage. Will be called by cpuimx27 init.
 *
 * Add platform devices present on this baseboard and init
 * them from CPU side as far as required to use them later on
 */
void __init eukrea_mbimx27_baseboard_init(void)
{
      mxc_gpio_setup_multiple_pins(eukrea_mbimx27_pins,
            ARRAY_SIZE(eukrea_mbimx27_pins), "MBIMX27");

      mxc_register_device(&mxc_uart_device1, &uart_pdata[0]);
      mxc_register_device(&mxc_uart_device2, &uart_pdata[1]);

      mxc_register_device(&mxc_fb_device, &eukrea_mbimx27_fb_data);
      mxc_register_device(&mxc_sdhc_device0, NULL);

#if defined(CONFIG_TOUCHSCREEN_ADS7846)
      || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
      /* SPI and ADS7846 Touchscreen controler init */
      mxc_gpio_mode(GPIO_PORTD | 28 | GPIO_GPIO | GPIO_OUT);
      mxc_gpio_mode(GPIO_PORTD | 25 | GPIO_GPIO | GPIO_IN);
      mxc_register_device(&mxc_spi_device0, &eukrea_mbimx27_spi_0_data);
      spi_register_board_info(eukrea_mbimx27_spi_board_info,
                  ARRAY_SIZE(eukrea_mbimx27_spi_board_info));
      ads7846_dev_init();
#endif

      /* Leds configuration */
      mxc_gpio_mode(GPIO_PORTF | 16 | GPIO_GPIO | GPIO_OUT);
      mxc_gpio_mode(GPIO_PORTF | 19 | GPIO_GPIO | GPIO_OUT);
      /* Backlight */
      mxc_gpio_mode(GPIO_PORTE | 5 | GPIO_GPIO | GPIO_OUT);

      platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
}

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