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wistron_btns.c

/*
 * Wistron laptop button driver
 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
 *
 * You can redistribute and/or modify this program under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation.
 *
 * 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/io.h>
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/input-polldev.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/mc146818rtc.h>
#include <linux/module.h>
#include <linux/preempt.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/leds.h>

/* How often we poll keys - msecs */
#define POLL_INTERVAL_DEFAULT 500 /* when idle */
#define POLL_INTERVAL_BURST   100 /* when a key was recently pressed */

/* BIOS subsystem IDs */
#define WIFI            0x35
#define BLUETOOTH 0x34
#define MAIL_LED  0x31

MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
MODULE_DESCRIPTION("Wistron laptop button driver");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.3");

static int force; /* = 0; */
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Load even if computer is not in database");

static char *keymap_name; /* = NULL; */
module_param_named(keymap, keymap_name, charp, 0);
MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected [generic, 1557/MS2141]");

static struct platform_device *wistron_device;

 /* BIOS interface implementation */

static void __iomem *bios_entry_point; /* BIOS routine entry point */
static void __iomem *bios_code_map_base;
static void __iomem *bios_data_map_base;

static u8 cmos_address;

struct regs {
      u32 eax, ebx, ecx;
};

static void call_bios(struct regs *regs)
{
      unsigned long flags;

      preempt_disable();
      local_irq_save(flags);
      asm volatile ("pushl %%ebp;"
                  "movl %7, %%ebp;"
                  "call *%6;"
                  "popl %%ebp"
                  : "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
                  : "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
                  "m" (bios_entry_point), "m" (bios_data_map_base)
                  : "edx", "edi", "esi", "memory");
      local_irq_restore(flags);
      preempt_enable();
}

static ssize_t __init locate_wistron_bios(void __iomem *base)
{
      static unsigned char __initdata signature[] =
            { 0x42, 0x21, 0x55, 0x30 };
      ssize_t offset;

      for (offset = 0; offset < 0x10000; offset += 0x10) {
            if (check_signature(base + offset, signature,
                            sizeof(signature)) != 0)
                  return offset;
      }
      return -1;
}

static int __init map_bios(void)
{
      void __iomem *base;
      ssize_t offset;
      u32 entry_point;

      base = ioremap(0xF0000, 0x10000); /* Can't fail */
      offset = locate_wistron_bios(base);
      if (offset < 0) {
            printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
            iounmap(base);
            return -ENODEV;
      }

      entry_point = readl(base + offset + 5);
      printk(KERN_DEBUG
            "wistron_btns: BIOS signature found at %p, entry point %08X\n",
            base + offset, entry_point);

      if (entry_point >= 0xF0000) {
            bios_code_map_base = base;
            bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
      } else {
            iounmap(base);
            bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
            if (bios_code_map_base == NULL) {
                  printk(KERN_ERR
                        "wistron_btns: Can't map BIOS code at %08X\n",
                        entry_point & ~0x3FFF);
                  goto err;
            }
            bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
      }
      /* The Windows driver maps 0x10000 bytes, we keep only one page... */
      bios_data_map_base = ioremap(0x400, 0xc00);
      if (bios_data_map_base == NULL) {
            printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
            goto err_code;
      }
      return 0;

err_code:
      iounmap(bios_code_map_base);
err:
      return -ENOMEM;
}

static inline void unmap_bios(void)
{
      iounmap(bios_code_map_base);
      iounmap(bios_data_map_base);
}

 /* BIOS calls */

static u16 bios_pop_queue(void)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = 0x061C;
      regs.ecx = 0x0000;
      call_bios(&regs);

      return regs.eax;
}

static void __devinit bios_attach(void)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = 0x012E;
      call_bios(&regs);
}

static void bios_detach(void)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = 0x002E;
      call_bios(&regs);
}

static u8 __devinit bios_get_cmos_address(void)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = 0x051C;
      call_bios(&regs);

      return regs.ecx;
}

static u16 __devinit bios_get_default_setting(u8 subsys)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = 0x0200 | subsys;
      call_bios(&regs);

      return regs.eax;
}

static void bios_set_state(u8 subsys, int enable)
{
      struct regs regs;

      memset(&regs, 0, sizeof (regs));
      regs.eax = 0x9610;
      regs.ebx = (enable ? 0x0100 : 0x0000) | subsys;
      call_bios(&regs);
}

/* Hardware database */

struct key_entry {
      char type;        /* See KE_* below */
      u8 code;
      union {
            u16 keycode;            /* For KE_KEY */
            struct {          /* For KE_SW */
                  u8 code;
                  u8 value;
            } sw;
      };
};

enum { KE_END, KE_KEY, KE_SW, KE_WIFI, KE_BLUETOOTH };

#define FE_MAIL_LED 0x01
#define FE_WIFI_LED 0x02
#define FE_UNTESTED 0x80

static struct key_entry *keymap; /* = NULL; Current key map */
static int have_wifi;
static int have_bluetooth;
static int have_leds;

static int __init dmi_matched(const struct dmi_system_id *dmi)
{
      const struct key_entry *key;

      keymap = dmi->driver_data;
      for (key = keymap; key->type != KE_END; key++) {
            if (key->type == KE_WIFI)
                  have_wifi = 1;
            else if (key->type == KE_BLUETOOTH)
                  have_bluetooth = 1;
      }
      have_leds = key->code & (FE_MAIL_LED | FE_WIFI_LED);

      return 1;
}

static struct key_entry keymap_empty[] __initdata = {
      { KE_END, 0 }
};

static struct key_entry keymap_fs_amilo_pro_v2000[] __initdata = {
      { KE_KEY,  0x01, {KEY_HELP} },
      { KE_KEY,  0x11, {KEY_PROG1} },
      { KE_KEY,  0x12, {KEY_PROG2} },
      { KE_WIFI, 0x30 },
      { KE_KEY,  0x31, {KEY_MAIL} },
      { KE_KEY,  0x36, {KEY_WWW} },
      { KE_END,  0 }
};

static struct key_entry keymap_fujitsu_n3510[] __initdata = {
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x71, {KEY_STOPCD} },
      { KE_KEY, 0x72, {KEY_PLAYPAUSE} },
      { KE_KEY, 0x74, {KEY_REWIND} },
      { KE_KEY, 0x78, {KEY_FORWARD} },
      { KE_END, 0 }
};

static struct key_entry keymap_wistron_ms2111[] __initdata = {
      { KE_KEY,  0x11, {KEY_PROG1} },
      { KE_KEY,  0x12, {KEY_PROG2} },
      { KE_KEY,  0x13, {KEY_PROG3} },
      { KE_KEY,  0x31, {KEY_MAIL} },
      { KE_KEY,  0x36, {KEY_WWW} },
      { KE_END, FE_MAIL_LED }
};

static struct key_entry keymap_wistron_md40100[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x37, {KEY_DISPLAYTOGGLE} }, /* Display on/off */
      { KE_END, FE_MAIL_LED | FE_WIFI_LED | FE_UNTESTED }
};

static struct key_entry keymap_wistron_ms2141[] __initdata = {
      { KE_KEY,  0x11, {KEY_PROG1} },
      { KE_KEY,  0x12, {KEY_PROG2} },
      { KE_WIFI, 0x30 },
      { KE_KEY,  0x22, {KEY_REWIND} },
      { KE_KEY,  0x23, {KEY_FORWARD} },
      { KE_KEY,  0x24, {KEY_PLAYPAUSE} },
      { KE_KEY,  0x25, {KEY_STOPCD} },
      { KE_KEY,  0x31, {KEY_MAIL} },
      { KE_KEY,  0x36, {KEY_WWW} },
      { KE_END,  0 }
};

static struct key_entry keymap_acer_aspire_1500[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_WIFI, 0x30 },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x49, {KEY_CONFIG} },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_UNTESTED }
};

static struct key_entry keymap_acer_aspire_1600[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x49, {KEY_CONFIG} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

/* 3020 has been tested */
static struct key_entry keymap_acer_aspire_5020[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x05, {KEY_SWITCHVIDEOMODE} }, /* Display selection */
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x6a, {KEY_CONFIG} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_2410[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x6d, {KEY_POWER} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x6a, {KEY_CONFIG} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_110[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x20, {KEY_VOLUMEUP} },
      { KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_SW, 0x4a, {.sw = {SW_LID, 1}} }, /* lid close */
      { KE_SW, 0x4b, {.sw = {SW_LID, 0}} }, /* lid open */
      { KE_WIFI, 0x30 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_300[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x20, {KEY_VOLUMEUP} },
      { KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_380[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} }, /* not 370 */
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_WIFI, 0x30 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

/* unusual map */
static struct key_entry keymap_acer_travelmate_220[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_MAIL} },
      { KE_KEY, 0x12, {KEY_WWW} },
      { KE_KEY, 0x13, {KEY_PROG2} },
      { KE_KEY, 0x31, {KEY_PROG1} },
      { KE_END, FE_WIFI_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_230[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_END, FE_WIFI_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_240[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_BLUETOOTH, 0x44 },
      { KE_WIFI, 0x30 },
      { KE_END, FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_350[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_MAIL} },
      { KE_KEY, 0x14, {KEY_PROG3} },
      { KE_KEY, 0x15, {KEY_WWW} },
      { KE_END, FE_MAIL_LED | FE_WIFI_LED | FE_UNTESTED }
};

static struct key_entry keymap_acer_travelmate_360[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_MAIL} },
      { KE_KEY, 0x14, {KEY_PROG3} },
      { KE_KEY, 0x15, {KEY_WWW} },
      { KE_KEY, 0x40, {KEY_WLAN} },
      { KE_END, FE_WIFI_LED | FE_UNTESTED } /* no mail led */
};

/* Wifi subsystem only activates the led. Therefore we need to pass
 * wifi event as a normal key, then userspace can really change the wifi state.
 * TODO we need to export led state to userspace (wifi and mail) */
static struct key_entry keymap_acer_travelmate_610[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_KEY, 0x14, {KEY_MAIL} },
      { KE_KEY, 0x15, {KEY_WWW} },
      { KE_KEY, 0x40, {KEY_WLAN} },
      { KE_END, FE_MAIL_LED | FE_WIFI_LED }
};

static struct key_entry keymap_acer_travelmate_630[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x08, {KEY_MUTE} }, /* not 620 */
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_KEY, 0x20, {KEY_VOLUMEUP} },
      { KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_WIFI, 0x30 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_aopen_1559as[] __initdata = {
      { KE_KEY,  0x01, {KEY_HELP} },
      { KE_KEY,  0x06, {KEY_PROG3} },
      { KE_KEY,  0x11, {KEY_PROG1} },
      { KE_KEY,  0x12, {KEY_PROG2} },
      { KE_WIFI, 0x30 },
      { KE_KEY,  0x31, {KEY_MAIL} },
      { KE_KEY,  0x36, {KEY_WWW} },
      { KE_END,  0 },
};

static struct key_entry keymap_fs_amilo_d88x0[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_END, FE_MAIL_LED | FE_WIFI_LED | FE_UNTESTED }
};

static struct key_entry keymap_wistron_md2900[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_WIFI, 0x30 },
      { KE_END, FE_MAIL_LED | FE_UNTESTED }
};

static struct key_entry keymap_wistron_md96500[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x05, {KEY_SWITCHVIDEOMODE} }, /* Display selection */
      { KE_KEY, 0x06, {KEY_DISPLAYTOGGLE} }, /* Display on/off */
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x20, {KEY_VOLUMEUP} },
      { KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
      { KE_KEY, 0x22, {KEY_REWIND} },
      { KE_KEY, 0x23, {KEY_FORWARD} },
      { KE_KEY, 0x24, {KEY_PLAYPAUSE} },
      { KE_KEY, 0x25, {KEY_STOPCD} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, FE_UNTESTED }
};

static struct key_entry keymap_wistron_generic[] __initdata = {
      { KE_KEY, 0x01, {KEY_HELP} },
      { KE_KEY, 0x02, {KEY_CONFIG} },
      { KE_KEY, 0x03, {KEY_POWER} },
      { KE_KEY, 0x05, {KEY_SWITCHVIDEOMODE} }, /* Display selection */
      { KE_KEY, 0x06, {KEY_DISPLAYTOGGLE} }, /* Display on/off */
      { KE_KEY, 0x08, {KEY_MUTE} },
      { KE_KEY, 0x11, {KEY_PROG1} },
      { KE_KEY, 0x12, {KEY_PROG2} },
      { KE_KEY, 0x13, {KEY_PROG3} },
      { KE_KEY, 0x14, {KEY_MAIL} },
      { KE_KEY, 0x15, {KEY_WWW} },
      { KE_KEY, 0x20, {KEY_VOLUMEUP} },
      { KE_KEY, 0x21, {KEY_VOLUMEDOWN} },
      { KE_KEY, 0x22, {KEY_REWIND} },
      { KE_KEY, 0x23, {KEY_FORWARD} },
      { KE_KEY, 0x24, {KEY_PLAYPAUSE} },
      { KE_KEY, 0x25, {KEY_STOPCD} },
      { KE_KEY, 0x31, {KEY_MAIL} },
      { KE_KEY, 0x36, {KEY_WWW} },
      { KE_KEY, 0x37, {KEY_DISPLAYTOGGLE} }, /* Display on/off */
      { KE_KEY, 0x40, {KEY_WLAN} },
      { KE_KEY, 0x49, {KEY_CONFIG} },
      { KE_SW, 0x4a, {.sw = {SW_LID, 1}} }, /* lid close */
      { KE_SW, 0x4b, {.sw = {SW_LID, 0}} }, /* lid open */
      { KE_KEY, 0x6a, {KEY_CONFIG} },
      { KE_KEY, 0x6d, {KEY_POWER} },
      { KE_KEY, 0x71, {KEY_STOPCD} },
      { KE_KEY, 0x72, {KEY_PLAYPAUSE} },
      { KE_KEY, 0x74, {KEY_REWIND} },
      { KE_KEY, 0x78, {KEY_FORWARD} },
      { KE_WIFI, 0x30 },
      { KE_BLUETOOTH, 0x44 },
      { KE_END, 0 }
};

/*
 * If your machine is not here (which is currently rather likely), please send
 * a list of buttons and their key codes (reported when loading this module
 * with force=1) and the output of dmidecode to $MODULE_AUTHOR.
 */
static struct dmi_system_id dmi_ids[] __initdata = {
      {
            .callback = dmi_matched,
            .ident = "Fujitsu-Siemens Amilo Pro V2000",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
            },
            .driver_data = keymap_fs_amilo_pro_v2000
      },
      {
            .callback = dmi_matched,
            .ident = "Fujitsu-Siemens Amilo M7400",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "AMILO M        "),
            },
            .driver_data = keymap_fs_amilo_pro_v2000
      },
      {
            .callback = dmi_matched,
            .ident = "Fujitsu N3510",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "N3510"),
            },
            .driver_data = keymap_fujitsu_n3510
      },
      {
            .callback = dmi_matched,
            .ident = "Acer Aspire 1500",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
            },
            .driver_data = keymap_acer_aspire_1500
      },
      {
            .callback = dmi_matched,
            .ident = "Acer Aspire 1600",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1600"),
            },
            .driver_data = keymap_acer_aspire_1600
      },
      {
            .callback = dmi_matched,
            .ident = "Acer Aspire 3020",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3020"),
            },
            .driver_data = keymap_acer_aspire_5020
      },
      {
            .callback = dmi_matched,
            .ident = "Acer Aspire 5020",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5020"),
            },
            .driver_data = keymap_acer_aspire_5020
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 2100",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2100"),
            },
            .driver_data = keymap_acer_aspire_5020
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 2410",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2410"),
            },
            .driver_data = keymap_acer_travelmate_2410
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate C300",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate C300"),
            },
            .driver_data = keymap_acer_travelmate_300
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate C100",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate C100"),
            },
            .driver_data = keymap_acer_travelmate_300
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate C110",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate C110"),
            },
            .driver_data = keymap_acer_travelmate_110
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 380",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 380"),
            },
            .driver_data = keymap_acer_travelmate_380
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 370",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 370"),
            },
            .driver_data = keymap_acer_travelmate_380 /* keyboard minus 1 key */
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 220",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 220"),
            },
            .driver_data = keymap_acer_travelmate_220
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 260",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 260"),
            },
            .driver_data = keymap_acer_travelmate_220
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 230",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 230"),
                  /* acerhk looks for "TravelMate F4..." ?! */
            },
            .driver_data = keymap_acer_travelmate_230
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 280",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 280"),
            },
            .driver_data = keymap_acer_travelmate_230
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 240",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 240"),
            },
            .driver_data = keymap_acer_travelmate_240
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 250",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 250"),
            },
            .driver_data = keymap_acer_travelmate_240
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 2424NWXCi",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2420"),
            },
            .driver_data = keymap_acer_travelmate_240
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 350",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 350"),
            },
            .driver_data = keymap_acer_travelmate_350
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 360",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
            },
            .driver_data = keymap_acer_travelmate_360
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 610",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 610"),
            },
            .driver_data = keymap_acer_travelmate_610
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 620",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 620"),
            },
            .driver_data = keymap_acer_travelmate_630
      },
      {
            .callback = dmi_matched,
            .ident = "Acer TravelMate 630",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 630"),
            },
            .driver_data = keymap_acer_travelmate_630
      },
      {
            .callback = dmi_matched,
            .ident = "AOpen 1559AS",
            .matches = {
                  DMI_MATCH(DMI_PRODUCT_NAME, "E2U"),
                  DMI_MATCH(DMI_BOARD_NAME, "E2U"),
            },
            .driver_data = keymap_aopen_1559as
      },
      {
            .callback = dmi_matched,
            .ident = "Medion MD 9783",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "MD 9783"),
            },
            .driver_data = keymap_wistron_ms2111
      },
      {
            .callback = dmi_matched,
            .ident = "Medion MD 40100",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "WID2000"),
            },
            .driver_data = keymap_wistron_md40100
      },
      {
            .callback = dmi_matched,
            .ident = "Medion MD 2900",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "WIM 2000"),
            },
            .driver_data = keymap_wistron_md2900
      },
      {
            .callback = dmi_matched,
            .ident = "Medion MD 96500",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "MEDIONPC"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "WIM 2040"),
            },
            .driver_data = keymap_wistron_md96500
      },
      {
            .callback = dmi_matched,
            .ident = "Medion MD 95400",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "MEDIONPC"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "WIM 2050"),
            },
            .driver_data = keymap_wistron_md96500
      },
      {
            .callback = dmi_matched,
            .ident = "Fujitsu Siemens Amilo D7820",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), /* not sure */
                  DMI_MATCH(DMI_PRODUCT_NAME, "Amilo D"),
            },
            .driver_data = keymap_fs_amilo_d88x0
      },
      {
            .callback = dmi_matched,
            .ident = "Fujitsu Siemens Amilo D88x0",
            .matches = {
                  DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
                  DMI_MATCH(DMI_PRODUCT_NAME, "AMILO D"),
            },
            .driver_data = keymap_fs_amilo_d88x0
      },
      { NULL, }
};

/* Copy the good keymap, as the original ones are free'd */
static int __init copy_keymap(void)
{
      const struct key_entry *key;
      struct key_entry *new_keymap;
      unsigned int length = 1;

      for (key = keymap; key->type != KE_END; key++)
            length++;

      new_keymap = kmalloc(length * sizeof(struct key_entry), GFP_KERNEL);
      if (!new_keymap)
            return -ENOMEM;

      memcpy(new_keymap, keymap, length * sizeof(struct key_entry));
      keymap = new_keymap;

      return 0;
}

static int __init select_keymap(void)
{
      dmi_check_system(dmi_ids);
      if (keymap_name != NULL) {
            if (strcmp (keymap_name, "1557/MS2141") == 0)
                  keymap = keymap_wistron_ms2141;
            else if (strcmp (keymap_name, "generic") == 0)
                  keymap = keymap_wistron_generic;
            else {
                  printk(KERN_ERR "wistron_btns: Keymap unknown\n");
                  return -EINVAL;
            }
      }
      if (keymap == NULL) {
            if (!force) {
                  printk(KERN_ERR "wistron_btns: System unknown\n");
                  return -ENODEV;
            }
            keymap = keymap_empty;
      }

      return copy_keymap();
}

 /* Input layer interface */

static struct input_polled_dev *wistron_idev;
static unsigned long jiffies_last_press;
static int wifi_enabled;
static int bluetooth_enabled;

static void report_key(struct input_dev *dev, unsigned int keycode)
{
      input_report_key(dev, keycode, 1);
      input_sync(dev);
      input_report_key(dev, keycode, 0);
      input_sync(dev);
}

static void report_switch(struct input_dev *dev, unsigned int code, int value)
{
      input_report_switch(dev, code, value);
      input_sync(dev);
}


 /* led management */
static void wistron_mail_led_set(struct led_classdev *led_cdev,
                        enum led_brightness value)
{
      bios_set_state(MAIL_LED, (value != LED_OFF) ? 1 : 0);
}

/* same as setting up wifi card, but for laptops on which the led is managed */
static void wistron_wifi_led_set(struct led_classdev *led_cdev,
                        enum led_brightness value)
{
      bios_set_state(WIFI, (value != LED_OFF) ? 1 : 0);
}

static struct led_classdev wistron_mail_led = {
      .name             = "mail:green",
      .brightness_set         = wistron_mail_led_set,
};

static struct led_classdev wistron_wifi_led = {
      .name             = "wifi:red",
      .brightness_set         = wistron_wifi_led_set,
};

static void __devinit wistron_led_init(struct device *parent)
{
      if (have_leds & FE_WIFI_LED) {
            u16 wifi = bios_get_default_setting(WIFI);
            if (wifi & 1) {
                  wistron_wifi_led.brightness = (wifi & 2) ? LED_FULL : LED_OFF;
                  if (led_classdev_register(parent, &wistron_wifi_led))
                        have_leds &= ~FE_WIFI_LED;
                  else
                        bios_set_state(WIFI, wistron_wifi_led.brightness);

            } else
                  have_leds &= ~FE_WIFI_LED;
      }

      if (have_leds & FE_MAIL_LED) {
            /* bios_get_default_setting(MAIL) always retuns 0, so just turn the led off */
            wistron_mail_led.brightness = LED_OFF;
            if (led_classdev_register(parent, &wistron_mail_led))
                  have_leds &= ~FE_MAIL_LED;
            else
                  bios_set_state(MAIL_LED, wistron_mail_led.brightness);
      }
}

static void __devexit wistron_led_remove(void)
{
      if (have_leds & FE_MAIL_LED)
            led_classdev_unregister(&wistron_mail_led);

      if (have_leds & FE_WIFI_LED)
            led_classdev_unregister(&wistron_wifi_led);
}

static inline void wistron_led_suspend(void)
{
      if (have_leds & FE_MAIL_LED)
            led_classdev_suspend(&wistron_mail_led);

      if (have_leds & FE_WIFI_LED)
            led_classdev_suspend(&wistron_wifi_led);
}

static inline void wistron_led_resume(void)
{
      if (have_leds & FE_MAIL_LED)
            led_classdev_resume(&wistron_mail_led);

      if (have_leds & FE_WIFI_LED)
            led_classdev_resume(&wistron_wifi_led);
}

static struct key_entry *wistron_get_entry_by_scancode(int code)
{
      struct key_entry *key;

      for (key = keymap; key->type != KE_END; key++)
            if (code == key->code)
                  return key;

      return NULL;
}

static struct key_entry *wistron_get_entry_by_keycode(int keycode)
{
      struct key_entry *key;

      for (key = keymap; key->type != KE_END; key++)
            if (key->type == KE_KEY && keycode == key->keycode)
                  return key;

      return NULL;
}

static void handle_key(u8 code)
{
      const struct key_entry *key = wistron_get_entry_by_scancode(code);

      if (key) {
            switch (key->type) {
            case KE_KEY:
                  report_key(wistron_idev->input, key->keycode);
                  break;

            case KE_SW:
                  report_switch(wistron_idev->input,
                              key->sw.code, key->sw.value);
                  break;

            case KE_WIFI:
                  if (have_wifi) {
                        wifi_enabled = !wifi_enabled;
                        bios_set_state(WIFI, wifi_enabled);
                  }
                  break;

            case KE_BLUETOOTH:
                  if (have_bluetooth) {
                        bluetooth_enabled = !bluetooth_enabled;
                        bios_set_state(BLUETOOTH, bluetooth_enabled);
                  }
                  break;

            default:
                  BUG();
            }
            jiffies_last_press = jiffies;
      } else
            printk(KERN_NOTICE
                  "wistron_btns: Unknown key code %02X\n", code);
}

static void poll_bios(bool discard)
{
      u8 qlen;
      u16 val;

      for (;;) {
            qlen = CMOS_READ(cmos_address);
            if (qlen == 0)
                  break;
            val = bios_pop_queue();
            if (val != 0 && !discard)
                  handle_key((u8)val);
      }
}

static void wistron_flush(struct input_polled_dev *dev)
{
      /* Flush stale event queue */
      poll_bios(true);
}

static void wistron_poll(struct input_polled_dev *dev)
{
      poll_bios(false);

      /* Increase poll frequency if user is currently pressing keys (< 2s ago) */
      if (time_before(jiffies, jiffies_last_press + 2 * HZ))
            dev->poll_interval = POLL_INTERVAL_BURST;
      else
            dev->poll_interval = POLL_INTERVAL_DEFAULT;
}

static int wistron_getkeycode(struct input_dev *dev, int scancode, int *keycode)
{
      const struct key_entry *key = wistron_get_entry_by_scancode(scancode);

      if (key && key->type == KE_KEY) {
            *keycode = key->keycode;
            return 0;
      }

      return -EINVAL;
}

static int wistron_setkeycode(struct input_dev *dev, int scancode, int keycode)
{
      struct key_entry *key;
      int old_keycode;

      if (keycode < 0 || keycode > KEY_MAX)
            return -EINVAL;

      key = wistron_get_entry_by_scancode(scancode);
      if (key && key->type == KE_KEY) {
            old_keycode = key->keycode;
            key->keycode = keycode;
            set_bit(keycode, dev->keybit);
            if (!wistron_get_entry_by_keycode(old_keycode))
                  clear_bit(old_keycode, dev->keybit);
            return 0;
      }

      return -EINVAL;
}

static int __devinit setup_input_dev(void)
{
      const struct key_entry *key;
      struct input_dev *input_dev;
      int error;

      wistron_idev = input_allocate_polled_device();
      if (!wistron_idev)
            return -ENOMEM;

      wistron_idev->flush = wistron_flush;
      wistron_idev->poll = wistron_poll;
      wistron_idev->poll_interval = POLL_INTERVAL_DEFAULT;

      input_dev = wistron_idev->input;
      input_dev->name = "Wistron laptop buttons";
      input_dev->phys = "wistron/input0";
      input_dev->id.bustype = BUS_HOST;
      input_dev->dev.parent = &wistron_device->dev;

      input_dev->getkeycode = wistron_getkeycode;
      input_dev->setkeycode = wistron_setkeycode;

      for (key = keymap; key->type != KE_END; key++) {
            switch (key->type) {
                  case KE_KEY:
                        set_bit(EV_KEY, input_dev->evbit);
                        set_bit(key->keycode, input_dev->keybit);
                        break;

                  case KE_SW:
                        set_bit(EV_SW, input_dev->evbit);
                        set_bit(key->sw.code, input_dev->swbit);
                        break;

                  default:
                        break;
            }
      }

      /* reads information flags on KE_END */
      if (key->code & FE_UNTESTED)
            printk(KERN_WARNING "Untested laptop multimedia keys, "
                  "please report success or failure to eric.piel"
                  "@tremplin-utc.net\n");

      error = input_register_polled_device(wistron_idev);
      if (error) {
            input_free_polled_device(wistron_idev);
            return error;
      }

      return 0;
}

/* Driver core */

static int __devinit wistron_probe(struct platform_device *dev)
{
      int err;

      bios_attach();
      cmos_address = bios_get_cmos_address();

      if (have_wifi) {
            u16 wifi = bios_get_default_setting(WIFI);
            if (wifi & 1)
                  wifi_enabled = (wifi & 2) ? 1 : 0;
            else
                  have_wifi = 0;

            if (have_wifi)
                  bios_set_state(WIFI, wifi_enabled);
      }

      if (have_bluetooth) {
            u16 bt = bios_get_default_setting(BLUETOOTH);
            if (bt & 1)
                  bluetooth_enabled = (bt & 2) ? 1 : 0;
            else
                  have_bluetooth = 0;

            if (have_bluetooth)
                  bios_set_state(BLUETOOTH, bluetooth_enabled);
      }

      wistron_led_init(&dev->dev);
      err = setup_input_dev();
      if (err) {
            bios_detach();
            return err;
      }

      return 0;
}

static int __devexit wistron_remove(struct platform_device *dev)
{
      wistron_led_remove();
      input_unregister_polled_device(wistron_idev);
      input_free_polled_device(wistron_idev);
      bios_detach();

      return 0;
}

#ifdef CONFIG_PM
static int wistron_suspend(struct platform_device *dev, pm_message_t state)
{
      if (have_wifi)
            bios_set_state(WIFI, 0);

      if (have_bluetooth)
            bios_set_state(BLUETOOTH, 0);

      wistron_led_suspend();
      return 0;
}

static int wistron_resume(struct platform_device *dev)
{
      if (have_wifi)
            bios_set_state(WIFI, wifi_enabled);

      if (have_bluetooth)
            bios_set_state(BLUETOOTH, bluetooth_enabled);

      wistron_led_resume();
      poll_bios(true);

      return 0;
}
#else
#define wistron_suspend       NULL
#define wistron_resume        NULL
#endif

static struct platform_driver wistron_driver = {
      .driver           = {
            .name = "wistron-bios",
            .owner      = THIS_MODULE,
      },
      .probe            = wistron_probe,
      .remove           = __devexit_p(wistron_remove),
      .suspend    = wistron_suspend,
      .resume           = wistron_resume,
};

static int __init wb_module_init(void)
{
      int err;

      err = select_keymap();
      if (err)
            return err;

      err = map_bios();
      if (err)
            return err;

      err = platform_driver_register(&wistron_driver);
      if (err)
            goto err_unmap_bios;

      wistron_device = platform_device_alloc("wistron-bios", -1);
      if (!wistron_device) {
            err = -ENOMEM;
            goto err_unregister_driver;
      }

      err = platform_device_add(wistron_device);
      if (err)
            goto err_free_device;

      return 0;

 err_free_device:
      platform_device_put(wistron_device);
 err_unregister_driver:
      platform_driver_unregister(&wistron_driver);
 err_unmap_bios:
      unmap_bios();

      return err;
}

static void __exit wb_module_exit(void)
{
      platform_device_unregister(wistron_device);
      platform_driver_unregister(&wistron_driver);
      unmap_bios();
      kfree(keymap);
}

module_init(wb_module_init);
module_exit(wb_module_exit);

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