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dsmg600-setup.c

/*
 * DSM-G600 board-setup
 *
 * Copyright (C) 2006 Tower Technologies
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 *
 * based ixdp425-setup.c:
 *      Copyright (C) 2003-2004 MontaVista Software, Inc.
 *
 * Author: Alessandro Zummo <a.zummo@towertech.it>
 * Maintainers: http://www.nslu2-linux.org/
 */

#include <linux/kernel.h>
#include <linux/serial.h>
#include <linux/serial_8250.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>

static struct flash_platform_data dsmg600_flash_data = {
      .map_name         = "cfi_probe",
      .width                  = 2,
};

static struct resource dsmg600_flash_resource = {
      .flags                  = IORESOURCE_MEM,
};

static struct platform_device dsmg600_flash = {
      .name             = "IXP4XX-Flash",
      .id               = 0,
      .dev.platform_data      = &dsmg600_flash_data,
      .num_resources          = 1,
      .resource         = &dsmg600_flash_resource,
};

static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = {
      .sda_pin          = DSMG600_SDA_PIN,
      .scl_pin          = DSMG600_SCL_PIN,
};

static struct platform_device dsmg600_i2c_controller = {
      .name             = "IXP4XX-I2C",
      .id               = 0,
      .dev.platform_data      = &dsmg600_i2c_gpio_pins,
};

#ifdef CONFIG_LEDS_CLASS
static struct resource dsmg600_led_resources[] = {
      {
            .name           = "power",
            .start          = DSMG600_LED_PWR_GPIO,
            .end            = DSMG600_LED_PWR_GPIO,
            .flags          = IXP4XX_GPIO_HIGH,
      },
      {
            .name           = "wlan",
            .start            = DSMG600_LED_WLAN_GPIO,
            .end            = DSMG600_LED_WLAN_GPIO,
            .flags          = IXP4XX_GPIO_LOW,
      },
};

static struct platform_device dsmg600_leds = {
        .name                   = "IXP4XX-GPIO-LED",
        .id                     = -1,
        .num_resources          = ARRAY_SIZE(dsmg600_led_resources),
        .resource               = dsmg600_led_resources,
};
#endif

static struct resource dsmg600_uart_resources[] = {
      {
            .start            = IXP4XX_UART1_BASE_PHYS,
            .end        = IXP4XX_UART1_BASE_PHYS + 0x0fff,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = IXP4XX_UART2_BASE_PHYS,
            .end        = IXP4XX_UART2_BASE_PHYS + 0x0fff,
            .flags            = IORESOURCE_MEM,
      }
};

static struct plat_serial8250_port dsmg600_uart_data[] = {
      {
            .mapbase    = IXP4XX_UART1_BASE_PHYS,
            .membase    = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
            .irq        = IRQ_IXP4XX_UART1,
            .flags            = UPF_BOOT_AUTOCONF,
            .iotype           = UPIO_MEM,
            .regshift   = 2,
            .uartclk    = IXP4XX_UART_XTAL,
      },
      {
            .mapbase    = IXP4XX_UART2_BASE_PHYS,
            .membase    = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
            .irq        = IRQ_IXP4XX_UART2,
            .flags            = UPF_BOOT_AUTOCONF,
            .iotype           = UPIO_MEM,
            .regshift   = 2,
            .uartclk    = IXP4XX_UART_XTAL,
      },
      { }
};

static struct platform_device dsmg600_uart = {
      .name             = "serial8250",
      .id               = PLAT8250_DEV_PLATFORM,
      .dev.platform_data      = dsmg600_uart_data,
      .num_resources          = ARRAY_SIZE(dsmg600_uart_resources),
      .resource         = dsmg600_uart_resources,
};

static struct platform_device *dsmg600_devices[] __initdata = {
      &dsmg600_i2c_controller,
      &dsmg600_flash,
};

static void dsmg600_power_off(void)
{
      /* enable the pwr cntl gpio */
      gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);

      /* poweroff */
      gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
}

static void __init dsmg600_timer_init(void)
{
    /* The xtal on this machine is non-standard. */
    ixp4xx_timer_freq = DSMG600_FREQ;

    /* Call standard timer_init function. */
    ixp4xx_timer_init();
}

static struct sys_timer dsmg600_timer = {
    .init   = dsmg600_timer_init,
};

static void __init dsmg600_init(void)
{
      ixp4xx_sys_init();

      /* Make sure that GPIO14 and GPIO15 are not used as clocks */
      *IXP4XX_GPIO_GPCLKR = 0;

      dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
      dsmg600_flash_resource.end =
            IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

      pm_power_off = dsmg600_power_off;

      /* The UART is required on the DSM-G600 (Redboot cannot use the
       * NIC) -- do it here so that it does *not* get removed if
       * platform_add_devices fails!
         */
        (void)platform_device_register(&dsmg600_uart);

      platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));

#ifdef CONFIG_LEDS_CLASS
        /* We don't care whether or not this works. */
        (void)platform_device_register(&dsmg600_leds);
#endif
}

MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
      /* Maintainer: www.nslu2-linux.org */
      .phys_io    = IXP4XX_PERIPHERAL_BASE_PHYS,
      .io_pg_offst      = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
      .boot_params      = 0x00000100,
      .map_io           = ixp4xx_map_io,
      .init_irq   = ixp4xx_init_irq,
      .timer          = &dsmg600_timer,
      .init_machine     = dsmg600_init,
MACHINE_END

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