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board-sam9g20ek.c

/*
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2008 Atmel
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/at73c213.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/clk.h>

#include <mach/hardware.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/board.h>
#include <mach/gpio.h>
#include <mach/at91sam9_smc.h>

#include "sam9_smc.h"
#include "generic.h"


static void __init ek_map_io(void)
{
      /* Initialize processor: 18.432 MHz crystal */
      at91sam9260_initialize(18432000);

      /* DBGU on ttyS0. (Rx & Tx only) */
      at91_register_uart(0, 0, 0);

      /* USART0 on ttyS1. (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI) */
      at91_register_uart(AT91SAM9260_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS
                     | ATMEL_UART_DTR | ATMEL_UART_DSR | ATMEL_UART_DCD
                     | ATMEL_UART_RI);

      /* USART1 on ttyS2. (Rx, Tx, RTS, CTS) */
      at91_register_uart(AT91SAM9260_ID_US1, 2, ATMEL_UART_CTS | ATMEL_UART_RTS);

      /* set serial console to ttyS0 (ie, DBGU) */
      at91_set_serial_console(0);
}

static void __init ek_init_irq(void)
{
      at91sam9260_init_interrupts(NULL);
}


/*
 * USB Host port
 */
static struct at91_usbh_data __initdata ek_usbh_data = {
      .ports            = 2,
};

/*
 * USB Device port
 */
static struct at91_udc_data __initdata ek_udc_data = {
      .vbus_pin   = AT91_PIN_PC5,
      .pullup_pin = 0,        /* pull-up driven by UDC */
};


/*
 * SPI devices.
 */
static struct spi_board_info ek_spi_devices[] = {
#if !defined(CONFIG_MMC_AT91)
      {     /* DataFlash chip */
            .modalias   = "mtd_dataflash",
            .chip_select      = 1,
            .max_speed_hz     = 15 * 1000 * 1000,
            .bus_num    = 0,
      },
#if defined(CONFIG_MTD_AT91_DATAFLASH_CARD)
      {     /* DataFlash card */
            .modalias   = "mtd_dataflash",
            .chip_select      = 0,
            .max_speed_hz     = 15 * 1000 * 1000,
            .bus_num    = 0,
      },
#endif
#endif
};


/*
 * MACB Ethernet device
 */
static struct at91_eth_data __initdata ek_macb_data = {
      .phy_irq_pin      = AT91_PIN_PA7,
      .is_rmii    = 1,
};


/*
 * NAND flash
 */
static struct mtd_partition __initdata ek_nand_partition[] = {
      {
            .name   = "Bootstrap",
            .offset = 0,
            .size   = 4 * SZ_1M,
      },
      {
            .name = "Partition 1",
            .offset     = MTDPART_OFS_NXTBLK,
            .size = 60 * SZ_1M,
      },
      {
            .name = "Partition 2",
            .offset     = MTDPART_OFS_NXTBLK,
            .size = MTDPART_SIZ_FULL,
      },
};

static struct mtd_partition * __init nand_partitions(int size, int *num_partitions)
{
      *num_partitions = ARRAY_SIZE(ek_nand_partition);
      return ek_nand_partition;
}

/* det_pin is not connected */
static struct atmel_nand_data __initdata ek_nand_data = {
      .ale        = 21,
      .cle        = 22,
      .rdy_pin    = AT91_PIN_PC13,
      .enable_pin = AT91_PIN_PC14,
      .partition_info   = nand_partitions,
#if defined(CONFIG_MTD_NAND_ATMEL_BUSWIDTH_16)
      .bus_width_16     = 1,
#else
      .bus_width_16     = 0,
#endif
};

static struct sam9_smc_config __initdata ek_nand_smc_config = {
      .ncs_read_setup         = 0,
      .nrd_setup        = 2,
      .ncs_write_setup  = 0,
      .nwe_setup        = 2,

      .ncs_read_pulse         = 4,
      .nrd_pulse        = 4,
      .ncs_write_pulse  = 4,
      .nwe_pulse        = 4,

      .read_cycle       = 7,
      .write_cycle            = 7,

      .mode             = AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE,
      .tdf_cycles       = 3,
};

static void __init ek_add_device_nand(void)
{
      /* setup bus-width (8 or 16) */
      if (ek_nand_data.bus_width_16)
            ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
      else
            ek_nand_smc_config.mode |= AT91_SMC_DBW_8;

      /* configure chip-select 3 (NAND) */
      sam9_smc_configure(3, &ek_nand_smc_config);

      at91_add_device_nand(&ek_nand_data);
}


/*
 * MCI (SD/MMC)
 * det_pin, wp_pin and vcc_pin are not connected
 */
static struct at91_mmc_data __initdata ek_mmc_data = {
      .slot_b           = 1,
      .wire4            = 1,
};


/*
 * LEDs
 */
static struct gpio_led ek_leds[] = {
      {     /* "bottom" led, green, userled1 to be defined */
            .name             = "ds5",
            .gpio             = AT91_PIN_PA6,
            .active_low       = 1,
            .default_trigger  = "none",
      },
      {     /* "power" led, yellow */
            .name             = "ds1",
            .gpio             = AT91_PIN_PA9,
            .default_trigger  = "heartbeat",
      }
};


/*
 * GPIO Buttons
 */
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
static struct gpio_keys_button ek_buttons[] = {
      {
            .gpio       = AT91_PIN_PA30,
            .code       = BTN_3,
            .desc       = "Button 3",
            .active_low = 1,
            .wakeup           = 1,
      },
      {
            .gpio       = AT91_PIN_PA31,
            .code       = BTN_4,
            .desc       = "Button 4",
            .active_low = 1,
            .wakeup           = 1,
      }
};

static struct gpio_keys_platform_data ek_button_data = {
      .buttons    = ek_buttons,
      .nbuttons   = ARRAY_SIZE(ek_buttons),
};

static struct platform_device ek_button_device = {
      .name       = "gpio-keys",
      .id         = -1,
      .num_resources    = 0,
      .dev        = {
            .platform_data    = &ek_button_data,
      }
};

static void __init ek_add_device_buttons(void)
{
      at91_set_gpio_input(AT91_PIN_PA30, 1);    /* btn3 */
      at91_set_deglitch(AT91_PIN_PA30, 1);
      at91_set_gpio_input(AT91_PIN_PA31, 1);    /* btn4 */
      at91_set_deglitch(AT91_PIN_PA31, 1);

      platform_device_register(&ek_button_device);
}
#else
static void __init ek_add_device_buttons(void) {}
#endif


static struct i2c_board_info __initdata ek_i2c_devices[] = {
      {
            I2C_BOARD_INFO("24c512", 0x50),
            I2C_BOARD_INFO("wm8731", 0x1b),
      },
};


static void __init ek_board_init(void)
{
      /* Serial */
      at91_add_device_serial();
      /* USB Host */
      at91_add_device_usbh(&ek_usbh_data);
      /* USB Device */
      at91_add_device_udc(&ek_udc_data);
      /* SPI */
      at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices));
      /* NAND */
      ek_add_device_nand();
      /* Ethernet */
      at91_add_device_eth(&ek_macb_data);
      /* MMC */
      at91_add_device_mmc(0, &ek_mmc_data);
      /* I2C */
      at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices));
      /* LEDs */
      at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
      /* Push Buttons */
      ek_add_device_buttons();
      /* PCK0 provides MCLK to the WM8731 */
      at91_set_B_periph(AT91_PIN_PC1, 0);
      /* SSC (for WM8731) */
      at91_add_device_ssc(AT91SAM9260_ID_SSC, ATMEL_SSC_TX);
}

MACHINE_START(AT91SAM9G20EK, "Atmel AT91SAM9G20-EK")
      /* Maintainer: Atmel */
      .phys_io    = AT91_BASE_SYS,
      .io_pg_offst      = (AT91_VA_BASE_SYS >> 18) & 0xfffc,
      .boot_params      = AT91_SDRAM_BASE + 0x100,
      .timer            = &at91sam926x_timer,
      .map_io           = ek_map_io,
      .init_irq   = ek_init_irq,
      .init_machine     = ek_board_init,
MACHINE_END

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