board-sam9g20ek.c

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/*
 *  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/gpio.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 <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/consumer.h>

#include <linux/platform_data/at91_adc.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/at91_aic.h>
#include <mach/at91sam9_smc.h>
#include <mach/system_rev.h>

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

/*
 * board revision encoding
 * bit 0:
 *  0 => 1 sd/mmc slot
 *  1 => 2 sd/mmc slots connectors (board from revision C)
 */
#define HAVE_2MMC   (1 << 0)
static int inline ek_have_2mmc(void)
{
    return machine_is_at91sam9g20ek_2mmc() || (system_rev & HAVE_2MMC);
}


static void __init ek_init_early(void)
{
    /* Initialize processor: 18.432 MHz crystal */
    at91_initialize(18432000);
}

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

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


/*
 * SPI devices.
 */
static struct spi_board_info ek_spi_devices[] = {
#if !IS_ENABLED(CONFIG_MMC_ATMELMCI)
    {   /* 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 macb_platform_data __initdata ek_macb_data = {
    .phy_irq_pin    = AT91_PIN_PA7,
    .is_rmii    = 1,
};

static void __init ek_add_device_macb(void)
{
    if (ek_have_2mmc())
        ek_macb_data.phy_irq_pin = AT91_PIN_PB0;

    at91_add_device_eth(&ek_macb_data);
}

/*
 * 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,
    },
};

/* 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,
    .det_pin    = -EINVAL,
    .ecc_mode   = NAND_ECC_SOFT,
    .on_flash_bbt   = 1,
    .parts      = ek_nand_partition,
    .num_parts  = ARRAY_SIZE(ek_nand_partition),
};

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)
{
    ek_nand_data.bus_width_16 = board_have_nand_16bit();
    /* 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(0, 3, &ek_nand_smc_config);

    at91_add_device_nand(&ek_nand_data);
}


/*
 * MCI (SD/MMC)
 * wp_pin and vcc_pin are not connected
 */
static struct mci_platform_data __initdata ek_mmc_data = {
    .slot[1] = {
        .bus_width  = 4,
        .detect_pin = AT91_PIN_PC9,
        .wp_pin     = -EINVAL,
    },

};

static void __init ek_add_device_mmc(void)
{
    if (ek_have_2mmc()) {
        ek_mmc_data.slot[0].bus_width = 4;
        ek_mmc_data.slot[0].detect_pin = AT91_PIN_PC2;
        ek_mmc_data.slot[0].wp_pin = -1;
    }
    at91_add_device_mci(0, &ek_mmc_data);
}

/*
 * 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",
    }
};

static void __init ek_add_device_gpio_leds(void)
{
    if (ek_have_2mmc()) {
        ek_leds[0].gpio = AT91_PIN_PB8;
        ek_leds[1].gpio = AT91_PIN_PB9;
    }

    at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
}

/*
 * 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

/*
 * ADCs
 */

static struct at91_adc_data ek_adc_data = {
    .channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3),
    .use_external_triggers = true,
    .vref = 3300,
};

#if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE)
static struct regulator_consumer_supply ek_audio_consumer_supplies[] = {
    REGULATOR_SUPPLY("AVDD", "0-001b"),
    REGULATOR_SUPPLY("HPVDD", "0-001b"),
    REGULATOR_SUPPLY("DBVDD", "0-001b"),
    REGULATOR_SUPPLY("DCVDD", "0-001b"),
};

static struct regulator_init_data ek_avdd_reg_init_data = {
    .constraints    = {
        .name   = "3V3",
        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
    },
    .consumer_supplies = ek_audio_consumer_supplies,
    .num_consumer_supplies = ARRAY_SIZE(ek_audio_consumer_supplies),
};

static struct fixed_voltage_config ek_vdd_pdata = {
    .supply_name    = "board-3V3",
    .microvolts = 3300000,
    .gpio       = -EINVAL,
    .enabled_at_boot = 0,
    .init_data  = &ek_avdd_reg_init_data,
};
static struct platform_device ek_voltage_regulator = {
    .name       = "reg-fixed-voltage",
    .id     = -1,
    .num_resources  = 0,
    .dev        = {
        .platform_data  = &ek_vdd_pdata,
    },
};
static void __init ek_add_regulators(void)
{
    platform_device_register(&ek_voltage_regulator);
}
#else
static void __init ek_add_regulators(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 */
    /* 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);
    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 */
    ek_add_device_macb();
    /* Regulators */
    ek_add_regulators();
    /* MMC */
    ek_add_device_mmc();
    /* I2C */
    at91_add_device_i2c(ek_i2c_devices, ARRAY_SIZE(ek_i2c_devices));
    /* LEDs */
    ek_add_device_gpio_leds();
    /* Push Buttons */
    ek_add_device_buttons();
    /* ADCs */
    at91_add_device_adc(&ek_adc_data);
    /* 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 */
    .timer      = &at91sam926x_timer,
    .map_io     = at91_map_io,
    .handle_irq = at91_aic_handle_irq,
    .init_early = ek_init_early,
    .init_irq   = at91_init_irq_default,
    .init_machine   = ek_board_init,
MACHINE_END

MACHINE_START(AT91SAM9G20EK_2MMC, "Atmel AT91SAM9G20-EK 2 MMC Slot Mod")
    /* Maintainer: Atmel */
    .timer      = &at91sam926x_timer,
    .map_io     = at91_map_io,
    .handle_irq = at91_aic_handle_irq,
    .init_early = ek_init_early,
    .init_irq   = at91_init_irq_default,
    .init_machine   = ek_board_init,
MACHINE_END