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wgt634u.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
 */

#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/leds.h>
#include <linux/mtd/physmap.h>
#include <linux/ssb/ssb.h>
#include <asm/mach-bcm47xx/bcm47xx.h>

/* GPIO definitions for the WGT634U */
#define WGT634U_GPIO_LED      3
#define WGT634U_GPIO_RESET    2
#define WGT634U_GPIO_TP1      7
#define WGT634U_GPIO_TP2      6
#define WGT634U_GPIO_TP3      5
#define WGT634U_GPIO_TP4      4
#define WGT634U_GPIO_TP5      1

static struct gpio_led wgt634u_leds[] = {
      {
            .name = "power",
            .gpio = WGT634U_GPIO_LED,
            .active_low = 1,
            .default_trigger = "heartbeat",
      },
};

static struct gpio_led_platform_data wgt634u_led_data = {
      .num_leds =     ARRAY_SIZE(wgt634u_leds),
      .leds =         wgt634u_leds,
};

static struct platform_device wgt634u_gpio_leds = {
      .name =         "leds-gpio",
      .id =           -1,
      .dev = {
            .platform_data = &wgt634u_led_data,
      }
};


/* 8MiB flash. The struct mtd_partition matches original Netgear WGT634U
   firmware. */
static struct mtd_partition wgt634u_partitions[] = {
      {
            .name       = "cfe",
            .offset     = 0,
            .size       = 0x60000,        /* 384k */
            .mask_flags = MTD_WRITEABLE   /* force read-only */
      },
      {
            .name   = "config",
            .offset = 0x60000,
            .size   = 0x20000       /* 128k */
      },
      {
            .name   = "linux",
            .offset = 0x80000,
            .size   = 0x140000            /* 1280k */
      },
      {
            .name   = "jffs",
            .offset = 0x1c0000,
            .size   = 0x620000            /* 6272k */
      },
      {
            .name   = "nvram",
            .offset = 0x7e0000,
            .size   = 0x20000       /* 128k */
      },
};

static struct physmap_flash_data wgt634u_flash_data = {
      .parts    = wgt634u_partitions,
      .nr_parts = ARRAY_SIZE(wgt634u_partitions)
};

static struct resource wgt634u_flash_resource = {
      .flags = IORESOURCE_MEM,
};

static struct platform_device wgt634u_flash = {
      .name          = "physmap-flash",
      .id            = 0,
      .dev           = { .platform_data = &wgt634u_flash_data, },
      .resource      = &wgt634u_flash_resource,
      .num_resources = 1,
};

/* Platform devices */
static struct platform_device *wgt634u_devices[] __initdata = {
      &wgt634u_flash,
      &wgt634u_gpio_leds,
};

static int __init wgt634u_init(void)
{
      /* There is no easy way to detect that we are running on a WGT634U
       * machine. Use the MAC address as an heuristic. Netgear Inc. has
       * been allocated ranges 00:09:5b:xx:xx:xx and 00:0f:b5:xx:xx:xx.
       */

      u8 *et0mac = ssb_bcm47xx.sprom.et0mac;

      if (et0mac[0] == 0x00 &&
          ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
           (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) {
            struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
            wgt634u_flash_data.width = mcore->flash_buswidth;
            wgt634u_flash_resource.start = mcore->flash_window;
            wgt634u_flash_resource.end = mcore->flash_window
                                 + mcore->flash_window_size
                                 - 1;
            return platform_add_devices(wgt634u_devices,
                                  ARRAY_SIZE(wgt634u_devices));
      } else
            return -ENODEV;
}

module_init(wgt634u_init);


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