drivers/input/misc/wistron_btns.c

   1 /*
   2  * Wistron laptop button driver
   3  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   4  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
   5  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
   6  *
   7  * You can redistribute and/or modify this program under the terms of the
   8  * GNU General Public License version 2 as published by the Free Software
   9  * Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
  14  * Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20 #include <linux/io.h>
  21 #include <linux/dmi.h>
  22 #include <linux/init.h>
  23 #include <linux/input.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/kernel.h>
  26 #include <linux/mc146818rtc.h>
  27 #include <linux/module.h>
  28 #include <linux/preempt.h>
  29 #include <linux/string.h>
  30 #include <linux/timer.h>
  31 #include <linux/types.h>
  32 #include <linux/platform_device.h>
  33
  34 /*
  35  * Number of attempts to read data from queue per poll;
  36  * the queue can hold up to 31 entries
  37  */
  38 #define MAX_POLL_ITERATIONS 64
  39
  40 #define POLL_FREQUENCY 10 /* Number of polls per second */
  41
  42 #if POLL_FREQUENCY > HZ
  43 #error "POLL_FREQUENCY too high"
  44 #endif
  45
  46 /* BIOS subsystem IDs */
  47 #define WIFI            0x35
  48 #define BLUETOOTH       0x34
  49
  50 MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
  51 MODULE_DESCRIPTION("Wistron laptop button driver");
  52 MODULE_LICENSE("GPL v2");
  53 MODULE_VERSION("0.1");
  54
  55 static int force; /* = 0; */
  56 module_param(force, bool, 0);
  57 MODULE_PARM_DESC(force, "Load even if computer is not in database");
  58
  59 static char *keymap_name; /* = NULL; */
  60 module_param_named(keymap, keymap_name, charp, 0);
  61 MODULE_PARM_DESC(keymap, "Keymap name, if it can't be autodetected");
  62
  63 static struct platform_device *wistron_device;
  64
  65  /* BIOS interface implementation */
  66
  67 static void __iomem *bios_entry_point; /* BIOS routine entry point */
  68 static void __iomem *bios_code_map_base;
  69 static void __iomem *bios_data_map_base;
  70
  71 static u8 cmos_address;
  72
  73 struct regs {
  74         u32 eax, ebx, ecx;
  75 };
  76
  77 static void call_bios(struct regs *regs)
  78 {
  79         unsigned long flags;
  80
  81         preempt_disable();
  82         local_irq_save(flags);
  83         asm volatile ("pushl %%ebp;"
  84                       "movl %7, %%ebp;"
  85                       "call *%6;"
  86                       "popl %%ebp"
  87                       : "=a" (regs->eax), "=b" (regs->ebx), "=c" (regs->ecx)
  88                       : "0" (regs->eax), "1" (regs->ebx), "2" (regs->ecx),
  89                         "m" (bios_entry_point), "m" (bios_data_map_base)
  90                       : "edx", "edi", "esi", "memory");
  91         local_irq_restore(flags);
  92         preempt_enable();
  93 }
  94
  95 static ssize_t __init locate_wistron_bios(void __iomem *base)
  96 {
  97         static unsigned char __initdata signature[] =
  98                 { 0x42, 0x21, 0x55, 0x30 };
  99         ssize_t offset;
 100
 101         for (offset = 0; offset < 0x10000; offset += 0x10) {
 102                 if (check_signature(base + offset, signature,
 103                                     sizeof(signature)) != 0)
 104                         return offset;
 105         }
 106         return -1;
 107 }
 108
 109 static int __init map_bios(void)
 110 {
 111         void __iomem *base;
 112         ssize_t offset;
 113         u32 entry_point;
 114
 115         base = ioremap(0xF0000, 0x10000); /* Can't fail */
 116         offset = locate_wistron_bios(base);
 117         if (offset < 0) {
 118                 printk(KERN_ERR "wistron_btns: BIOS entry point not found\n");
 119                 iounmap(base);
 120                 return -ENODEV;
 121         }
 122
 123         entry_point = readl(base + offset + 5);
 124         printk(KERN_DEBUG
 125                 "wistron_btns: BIOS signature found at %p, entry point %08X\n",
 126                 base + offset, entry_point);
 127
 128         if (entry_point >= 0xF0000) {
 129                 bios_code_map_base = base;
 130                 bios_entry_point = bios_code_map_base + (entry_point & 0xFFFF);
 131         } else {
 132                 iounmap(base);
 133                 bios_code_map_base = ioremap(entry_point & ~0x3FFF, 0x4000);
 134                 if (bios_code_map_base == NULL) {
 135                         printk(KERN_ERR
 136                                 "wistron_btns: Can't map BIOS code at %08X\n",
 137                                 entry_point & ~0x3FFF);
 138                         goto err;
 139                 }
 140                 bios_entry_point = bios_code_map_base + (entry_point & 0x3FFF);
 141         }
 142         /* The Windows driver maps 0x10000 bytes, we keep only one page... */
 143         bios_data_map_base = ioremap(0x400, 0xc00);
 144         if (bios_data_map_base == NULL) {
 145                 printk(KERN_ERR "wistron_btns: Can't map BIOS data\n");
 146                 goto err_code;
 147         }
 148         return 0;
 149
 150 err_code:
 151         iounmap(bios_code_map_base);
 152 err:
 153         return -ENOMEM;
 154 }
 155
 156 static inline void unmap_bios(void)
 157 {
 158         iounmap(bios_code_map_base);
 159         iounmap(bios_data_map_base);
 160 }
 161
 162  /* BIOS calls */
 163
 164 static u16 bios_pop_queue(void)
 165 {
 166         struct regs regs;
 167
 168         memset(&regs, 0, sizeof (regs));
 169         regs.eax = 0x9610;
 170         regs.ebx = 0x061C;
 171         regs.ecx = 0x0000;
 172         call_bios(&regs);
 173
 174         return regs.eax;
 175 }
 176
 177 static void __devinit bios_attach(void)
 178 {
 179         struct regs regs;
 180
 181         memset(&regs, 0, sizeof (regs));
 182         regs.eax = 0x9610;
 183         regs.ebx = 0x012E;
 184         call_bios(&regs);
 185 }
 186
 187 static void bios_detach(void)
 188 {
 189         struct regs regs;
 190
 191         memset(&regs, 0, sizeof (regs));
 192         regs.eax = 0x9610;
 193         regs.ebx = 0x002E;
 194         call_bios(&regs);
 195 }
 196
 197 static u8 __devinit bios_get_cmos_address(void)
 198 {
 199         struct regs regs;
 200
 201         memset(&regs, 0, sizeof (regs));
 202         regs.eax = 0x9610;
 203         regs.ebx = 0x051C;
 204         call_bios(&regs);
 205
 206         return regs.ecx;
 207 }
 208
 209 static u16 __devinit bios_get_default_setting(u8 subsys)
 210 {
 211         struct regs regs;
 212
 213         memset(&regs, 0, sizeof (regs));
 214         regs.eax = 0x9610;
 215         regs.ebx = 0x0200 | subsys;
 216         call_bios(&regs);
 217
 218         return regs.eax;
 219 }
 220
 221 static void bios_set_state(u8 subsys, int enable)
 222 {
 223         struct regs regs;
 224
 225         memset(&regs, 0, sizeof (regs));
 226         regs.eax = 0x9610;
 227         regs.ebx = (enable ? 0x0100 : 0x0000) | subsys;
 228         call_bios(&regs);
 229 }
 230
 231 /* Hardware database */
 232
 233 struct key_entry {
 234         char type;              /* See KE_* below */
 235         u8 code;
 236         unsigned keycode;       /* For KE_KEY */
 237 };
 238
 239 enum { KE_END, KE_KEY, KE_WIFI, KE_BLUETOOTH };
 240
 241 static const struct key_entry *keymap; /* = NULL; Current key map */
 242 static int have_wifi;
 243 static int have_bluetooth;
 244
 245 static int __init dmi_matched(struct dmi_system_id *dmi)
 246 {
 247         const struct key_entry *key;
 248
 249         keymap = dmi->driver_data;
 250         for (key = keymap; key->type != KE_END; key++) {
 251                 if (key->type == KE_WIFI)
 252                         have_wifi = 1;
 253                 else if (key->type == KE_BLUETOOTH)
 254                         have_bluetooth = 1;
 255         }
 256         return 1;
 257 }
 258
 259 static struct key_entry keymap_empty[] = {
 260         { KE_END, 0 }
 261 };
 262
 263 static struct key_entry keymap_fs_amilo_pro_v2000[] = {
 264         { KE_KEY,  0x01, KEY_HELP },
 265         { KE_KEY,  0x11, KEY_PROG1 },
 266         { KE_KEY,  0x12, KEY_PROG2 },
 267         { KE_WIFI, 0x30, 0 },
 268         { KE_KEY,  0x31, KEY_MAIL },
 269         { KE_KEY,  0x36, KEY_WWW },
 270         { KE_END,  0 }
 271 };
 272
 273 static struct key_entry keymap_fujitsu_n3510[] = {
 274         { KE_KEY, 0x11, KEY_PROG1 },
 275         { KE_KEY, 0x12, KEY_PROG2 },
 276         { KE_KEY, 0x36, KEY_WWW },
 277         { KE_KEY, 0x31, KEY_MAIL },
 278         { KE_KEY, 0x71, KEY_STOPCD },
 279         { KE_KEY, 0x72, KEY_PLAYPAUSE },
 280         { KE_KEY, 0x74, KEY_REWIND },
 281         { KE_KEY, 0x78, KEY_FORWARD },
 282         { KE_END, 0 }
 283 };
 284
 285 static struct key_entry keymap_wistron_ms2111[] = {
 286         { KE_KEY,  0x11, KEY_PROG1 },
 287         { KE_KEY,  0x12, KEY_PROG2 },
 288         { KE_KEY,  0x13, KEY_PROG3 },
 289         { KE_KEY,  0x31, KEY_MAIL },
 290         { KE_KEY,  0x36, KEY_WWW },
 291         { KE_END,  0 }
 292 };
 293
 294 static struct key_entry keymap_wistron_ms2141[] = {
 295         { KE_KEY,  0x11, KEY_PROG1 },
 296         { KE_KEY,  0x12, KEY_PROG2 },
 297         { KE_WIFI, 0x30, 0 },
 298         { KE_KEY,  0x22, KEY_REWIND },
 299         { KE_KEY,  0x23, KEY_FORWARD },
 300         { KE_KEY,  0x24, KEY_PLAYPAUSE },
 301         { KE_KEY,  0x25, KEY_STOPCD },
 302         { KE_KEY,  0x31, KEY_MAIL },
 303         { KE_KEY,  0x36, KEY_WWW },
 304         { KE_END,  0 }
 305 };
 306
 307 static struct key_entry keymap_acer_aspire_1500[] = {
 308         { KE_KEY, 0x11, KEY_PROG1 },
 309         { KE_KEY, 0x12, KEY_PROG2 },
 310         { KE_WIFI, 0x30, 0 },
 311         { KE_KEY, 0x31, KEY_MAIL },
 312         { KE_KEY, 0x36, KEY_WWW },
 313         { KE_BLUETOOTH, 0x44, 0 },
 314         { KE_END, 0 }
 315 };
 316
 317 static struct key_entry keymap_acer_travelmate_240[] = {
 318         { KE_KEY, 0x31, KEY_MAIL },
 319         { KE_KEY, 0x36, KEY_WWW },
 320         { KE_KEY, 0x11, KEY_PROG1 },
 321         { KE_KEY, 0x12, KEY_PROG2 },
 322         { KE_BLUETOOTH, 0x44, 0 },
 323         { KE_WIFI, 0x30, 0 },
 324         { KE_END, 0 }
 325 };
 326
 327 /* Wifi subsystem only activates the led. Therefore we need to pass
 328  * wifi event as a normal key, then userspace can really change the wifi state.
 329  * TODO we need to export led state to userspace (wifi and mail) */
 330 static struct key_entry keymap_acer_travelmate_610[] = {
 331         { KE_KEY, 0x01, KEY_HELP },
 332         { KE_KEY, 0x02, KEY_CONFIG },
 333         { KE_KEY, 0x11, KEY_PROG1 },
 334         { KE_KEY, 0x12, KEY_PROG2 },
 335         { KE_KEY, 0x13, KEY_PROG3 },
 336         { KE_KEY, 0x14, KEY_MAIL },
 337         { KE_KEY, 0x15, KEY_WWW },
 338         { KE_KEY, 0x40, KEY_WLAN }, /* Wifi */
 339         { KE_END, 0 }
 340 };
 341
 342 static struct key_entry keymap_aopen_1559as[] = {
 343         { KE_KEY,  0x01, KEY_HELP },
 344         { KE_KEY,  0x06, KEY_PROG3 },
 345         { KE_KEY,  0x11, KEY_PROG1 },
 346         { KE_KEY,  0x12, KEY_PROG2 },
 347         { KE_WIFI, 0x30, 0 },
 348         { KE_KEY,  0x31, KEY_MAIL },
 349         { KE_KEY,  0x36, KEY_WWW },
 350         { KE_END,  0 },
 351 };
 352
 353 static struct key_entry keymap_fs_amilo_d88x0[] = {
 354         { KE_KEY, 0x01, KEY_HELP },
 355         { KE_KEY, 0x08, KEY_MUTE },
 356         { KE_KEY, 0x31, KEY_MAIL },
 357         { KE_KEY, 0x36, KEY_WWW },
 358         { KE_KEY, 0x11, KEY_PROG1 },
 359         { KE_KEY, 0x12, KEY_PROG2 },
 360         { KE_KEY, 0x13, KEY_PROG3 },
 361         { KE_END, 0 }
 362 };
 363
 364 /*
 365  * If your machine is not here (which is currently rather likely), please send
 366  * a list of buttons and their key codes (reported when loading this module
 367  * with force=1) and the output of dmidecode to $MODULE_AUTHOR.
 368  */
 369 static struct dmi_system_id dmi_ids[] __initdata = {
 370         {
 371                 .callback = dmi_matched,
 372                 .ident = "Fujitsu-Siemens Amilo Pro V2000",
 373                 .matches = {
 374                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 375                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pro V2000"),
 376                 },
 377                 .driver_data = keymap_fs_amilo_pro_v2000
 378         },
 379         {
 380                 .callback = dmi_matched,
 381                 .ident = "Fujitsu-Siemens Amilo M7400",
 382                 .matches = {
 383                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 384                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO M        "),
 385                 },
 386                 .driver_data = keymap_fs_amilo_pro_v2000
 387         },
 388         {
 389                 .callback = dmi_matched,
 390                 .ident = "Fujitsu N3510",
 391                 .matches = {
 392                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 393                         DMI_MATCH(DMI_PRODUCT_NAME, "N3510"),
 394                 },
 395                 .driver_data = keymap_fujitsu_n3510
 396         },
 397         {
 398                 .callback = dmi_matched,
 399                 .ident = "Acer Aspire 1500",
 400                 .matches = {
 401                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 402                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
 403                 },
 404                 .driver_data = keymap_acer_aspire_1500
 405         },
 406         {
 407                 .callback = dmi_matched,
 408                 .ident = "Acer TravelMate 240",
 409                 .matches = {
 410                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 411                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 240"),
 412                 },
 413                 .driver_data = keymap_acer_travelmate_240
 414         },
 415         {
 416                 .callback = dmi_matched,
 417                 .ident = "Acer TravelMate 2424NWXCi",
 418                 .matches = {
 419                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 420                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2420"),
 421                 },
 422                 .driver_data = keymap_acer_travelmate_240
 423         },
 424         {
 425                 .callback = dmi_matched,
 426                 .ident = "Acer TravelMate 610",
 427                 .matches = {
 428                         DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
 429                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 610"),
 430                 },
 431                 .driver_data = keymap_acer_travelmate_610
 432         },
 433         {
 434                 .callback = dmi_matched,
 435                 .ident = "AOpen 1559AS",
 436                 .matches = {
 437                         DMI_MATCH(DMI_PRODUCT_NAME, "E2U"),
 438                         DMI_MATCH(DMI_BOARD_NAME, "E2U"),
 439                 },
 440                 .driver_data = keymap_aopen_1559as
 441         },
 442         {
 443                 .callback = dmi_matched,
 444                 .ident = "Medion MD 9783",
 445                 .matches = {
 446                         DMI_MATCH(DMI_SYS_VENDOR, "MEDIONNB"),
 447                         DMI_MATCH(DMI_PRODUCT_NAME, "MD 9783"),
 448                 },
 449                 .driver_data = keymap_wistron_ms2111
 450         },
 451         {
 452                 .callback = dmi_matched,
 453                 .ident = "Fujitsu Siemens Amilo D88x0",
 454                 .matches = {
 455                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 456                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO D"),
 457                 },
 458                 .driver_data = keymap_fs_amilo_d88x0
 459         },
 460         { NULL, }
 461 };
 462
 463 static int __init select_keymap(void)
 464 {
 465         if (keymap_name != NULL) {
 466                 if (strcmp (keymap_name, "1557/MS2141") == 0)
 467                         keymap = keymap_wistron_ms2141;
 468                 else {
 469                         printk(KERN_ERR "wistron_btns: Keymap unknown\n");
 470                         return -EINVAL;
 471                 }
 472         }
 473         dmi_check_system(dmi_ids);
 474         if (keymap == NULL) {
 475                 if (!force) {
 476                         printk(KERN_ERR "wistron_btns: System unknown\n");
 477                         return -ENODEV;
 478                 }
 479                 keymap = keymap_empty;
 480         }
 481         return 0;
 482 }
 483
 484  /* Input layer interface */
 485
 486 static struct input_dev *input_dev;
 487
 488 static int __devinit setup_input_dev(void)
 489 {
 490         const struct key_entry *key;
 491         int error;
 492
 493         input_dev = input_allocate_device();
 494         if (!input_dev)
 495                 return -ENOMEM;
 496
 497         input_dev->name = "Wistron laptop buttons";
 498         input_dev->phys = "wistron/input0";
 499         input_dev->id.bustype = BUS_HOST;
 500         input_dev->cdev.dev = &wistron_device->dev;
 501
 502         for (key = keymap; key->type != KE_END; key++) {
 503                 if (key->type == KE_KEY) {
 504                         input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
 505                         set_bit(key->keycode, input_dev->keybit);
 506                 }
 507         }
 508
 509         error = input_register_device(input_dev);
 510         if (error) {
 511                 input_free_device(input_dev);
 512                 return error;
 513         }
 514
 515         return 0;
 516 }
 517
 518 static void report_key(unsigned keycode)
 519 {
 520         input_report_key(input_dev, keycode, 1);
 521         input_sync(input_dev);
 522         input_report_key(input_dev, keycode, 0);
 523         input_sync(input_dev);
 524 }
 525
 526  /* Driver core */
 527
 528 static int wifi_enabled;
 529 static int bluetooth_enabled;
 530
 531 static void poll_bios(unsigned long);
 532
 533 static struct timer_list poll_timer = TIMER_INITIALIZER(poll_bios, 0, 0);
 534
 535 static void handle_key(u8 code)
 536 {
 537         const struct key_entry *key;
 538
 539         for (key = keymap; key->type != KE_END; key++) {
 540                 if (code == key->code) {
 541                         switch (key->type) {
 542                         case KE_KEY:
 543                                 report_key(key->keycode);
 544                                 break;
 545
 546                         case KE_WIFI:
 547                                 if (have_wifi) {
 548                                         wifi_enabled = !wifi_enabled;
 549                                         bios_set_state(WIFI, wifi_enabled);
 550                                 }
 551                                 break;
 552
 553                         case KE_BLUETOOTH:
 554                                 if (have_bluetooth) {
 555                                         bluetooth_enabled = !bluetooth_enabled;
 556                                         bios_set_state(BLUETOOTH, bluetooth_enabled);
 557                                 }
 558                                 break;
 559
 560                         case KE_END:
 561                         default:
 562                                 BUG();
 563                         }
 564                         return;
 565                 }
 566         }
 567         printk(KERN_NOTICE "wistron_btns: Unknown key code %02X\n", code);
 568 }
 569
 570 static void poll_bios(unsigned long discard)
 571 {
 572         u8 qlen;
 573         u16 val;
 574
 575         for (;;) {
 576                 qlen = CMOS_READ(cmos_address);
 577                 if (qlen == 0)
 578                         break;
 579                 val = bios_pop_queue();
 580                 if (val != 0 && !discard)
 581                         handle_key((u8)val);
 582         }
 583
 584         mod_timer(&poll_timer, jiffies + HZ / POLL_FREQUENCY);
 585 }
 586
 587 static int __devinit wistron_probe(struct platform_device *dev)
 588 {
 589         int err = setup_input_dev();
 590         if (err)
 591                 return err;
 592
 593         bios_attach();
 594         cmos_address = bios_get_cmos_address();
 595
 596         if (have_wifi) {
 597                 u16 wifi = bios_get_default_setting(WIFI);
 598                 if (wifi & 1)
 599                         wifi_enabled = (wifi & 2) ? 1 : 0;
 600                 else
 601                         have_wifi = 0;
 602
 603                 if (have_wifi)
 604                         bios_set_state(WIFI, wifi_enabled);
 605         }
 606
 607         if (have_bluetooth) {
 608                 u16 bt = bios_get_default_setting(BLUETOOTH);
 609                 if (bt & 1)
 610                         bluetooth_enabled = (bt & 2) ? 1 : 0;
 611                 else
 612                         have_bluetooth = 0;
 613
 614                 if (have_bluetooth)
 615                         bios_set_state(BLUETOOTH, bluetooth_enabled);
 616         }
 617
 618         poll_bios(1); /* Flush stale event queue and arm timer */
 619
 620         return 0;
 621 }
 622
 623 static int __devexit wistron_remove(struct platform_device *dev)
 624 {
 625         del_timer_sync(&poll_timer);
 626         input_unregister_device(input_dev);
 627         bios_detach();
 628
 629         return 0;
 630 }
 631
 632 #ifdef CONFIG_PM
 633 static int wistron_suspend(struct platform_device *dev, pm_message_t state)
 634 {
 635         del_timer_sync(&poll_timer);
 636
 637         if (have_wifi)
 638                 bios_set_state(WIFI, 0);
 639
 640         if (have_bluetooth)
 641                 bios_set_state(BLUETOOTH, 0);
 642
 643         return 0;
 644 }
 645
 646 static int wistron_resume(struct platform_device *dev)
 647 {
 648         if (have_wifi)
 649                 bios_set_state(WIFI, wifi_enabled);
 650
 651         if (have_bluetooth)
 652                 bios_set_state(BLUETOOTH, bluetooth_enabled);
 653
 654         poll_bios(1);
 655
 656         return 0;
 657 }
 658 #else
 659 #define wistron_suspend         NULL
 660 #define wistron_resume          NULL
 661 #endif
 662
 663 static struct platform_driver wistron_driver = {
 664         .driver         = {
 665                 .name   = "wistron-bios",
 666                 .owner  = THIS_MODULE,
 667         },
 668         .probe          = wistron_probe,
 669         .remove         = __devexit_p(wistron_remove),
 670         .suspend        = wistron_suspend,
 671         .resume         = wistron_resume,
 672 };
 673
 674 static int __init wb_module_init(void)
 675 {
 676         int err;
 677
 678         err = select_keymap();
 679         if (err)
 680                 return err;
 681
 682         err = map_bios();
 683         if (err)
 684                 return err;
 685
 686         err = platform_driver_register(&wistron_driver);
 687         if (err)
 688                 goto err_unmap_bios;
 689
 690         wistron_device = platform_device_alloc("wistron-bios", -1);
 691         if (!wistron_device) {
 692                 err = -ENOMEM;
 693                 goto err_unregister_driver;
 694         }
 695
 696         err = platform_device_add(wistron_device);
 697         if (err)
 698                 goto err_free_device;
 699
 700         return 0;
 701
 702  err_free_device:
 703         platform_device_put(wistron_device);
 704  err_unregister_driver:
 705         platform_driver_unregister(&wistron_driver);
 706  err_unmap_bios:
 707         unmap_bios();
 708
 709         return err;
 710 }
 711
 712 static void __exit wb_module_exit(void)
 713 {
 714         platform_device_unregister(wistron_device);
 715         platform_driver_unregister(&wistron_driver);
 716         unmap_bios();
 717 }
 718
 719 module_init(wb_module_init);
 720 module_exit(wb_module_exit);