lacie_v2-common.c

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/*
 * arch/arm/mach-kirkwood/lacie_v2-common.c
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mtd/physmap.h>
#include <linux/spi/flash.h>
#include <linux/spi/spi.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/gpio.h>
#include <asm/mach/time.h>
#include <mach/kirkwood.h>
#include <mach/irqs.h>
#include <plat/time.h>
#include "common.h"

/*****************************************************************************
 * 512KB SPI Flash on Boot Device (MACRONIX MX25L4005)
 ****************************************************************************/

static struct mtd_partition lacie_v2_flash_parts[] = {
    {
        .name = "u-boot",
        .size = MTDPART_SIZ_FULL,
        .offset = 0,
        .mask_flags = MTD_WRITEABLE, /* force read-only */
    },
};

static const struct flash_platform_data lacie_v2_flash = {
    .type       = "mx25l4005a",
    .name       = "spi_flash",
    .parts      = lacie_v2_flash_parts,
    .nr_parts   = ARRAY_SIZE(lacie_v2_flash_parts),
};

static struct spi_board_info __initdata lacie_v2_spi_slave_info[] = {
    {
        .modalias   = "m25p80",
        .platform_data  = &lacie_v2_flash,
        .irq        = -1,
        .max_speed_hz   = 20000000,
        .bus_num    = 0,
        .chip_select    = 0,
    },
};

void __init lacie_v2_register_flash(void)
{
    spi_register_board_info(lacie_v2_spi_slave_info,
                ARRAY_SIZE(lacie_v2_spi_slave_info));
    kirkwood_spi_init();
}

/*****************************************************************************
 * I2C devices
 ****************************************************************************/

static struct at24_platform_data at24c04 = {
    .byte_len   = SZ_4K / 8,
    .page_size  = 16,
};

/*
 * i2c addr | chip         | description
 * 0x50     | HT24LC04     | eeprom (512B)
 */

static struct i2c_board_info __initdata lacie_v2_i2c_info[] = {
    {
        I2C_BOARD_INFO("24c04", 0x50),
        .platform_data  = &at24c04,
    }
};

void __init lacie_v2_register_i2c_devices(void)
{
    kirkwood_i2c_init();
    i2c_register_board_info(0, lacie_v2_i2c_info,
                ARRAY_SIZE(lacie_v2_i2c_info));
}

/*****************************************************************************
 * Hard Disk power
 ****************************************************************************/

static int __initdata lacie_v2_gpio_hdd_power[] = { 16, 17, 41, 42, 43 };

void __init lacie_v2_hdd_power_init(int hdd_num)
{
    int i;
    int err;

    /* Power up all hard disks. */
    for (i = 0; i < hdd_num; i++) {
        err = gpio_request(lacie_v2_gpio_hdd_power[i], NULL);
        if (err == 0) {
            err = gpio_direction_output(
                    lacie_v2_gpio_hdd_power[i], 1);
            /* Free the HDD power GPIOs. This allow user-space to
             * configure them via the gpiolib sysfs interface. */
            gpio_free(lacie_v2_gpio_hdd_power[i]);
        }
        if (err)
            pr_err("Failed to power up HDD%d\n", i + 1);
    }
}