drivers/platform/x86/msi-laptop.c

   1 /*-*-linux-c-*-*/
   2
   3 /*
   4   Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
   5
   6   This program is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation; either version 2 of the License, or
   9   (at your option) any later version.
  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
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with this program; if not, write to the Free Software
  18   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19   02110-1301, USA.
  20  */
  21
  22 /*
  23  * msi-laptop.c - MSI S270 laptop support. This laptop is sold under
  24  * various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
  25  *
  26  * Driver also supports S271, S420 models.
  27  *
  28  * This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
  29  *
  30  *   lcd_level - Screen brightness: contains a single integer in the
  31  *   range 0..8. (rw)
  32  *
  33  *   auto_brightness - Enable automatic brightness control: contains
  34  *   either 0 or 1. If set to 1 the hardware adjusts the screen
  35  *   brightness automatically when the power cord is
  36  *   plugged/unplugged. (rw)
  37  *
  38  *   wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
  39  *
  40  *   bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
  41  *   Please note that this file is constantly 0 if no Bluetooth
  42  *   hardware is available. (ro)
  43  *
  44  * In addition to these platform device attributes the driver
  45  * registers itself in the Linux backlight control subsystem and is
  46  * available to userspace under /sys/class/backlight/msi-laptop-bl/.
  47  *
  48  * This driver might work on other laptops produced by MSI. If you
  49  * want to try it you can pass force=1 as argument to the module which
  50  * will force it to load even when the DMI data doesn't identify the
  51  * laptop as MSI S270. YMMV.
  52  */
  53
  54 #include <linux/module.h>
  55 #include <linux/kernel.h>
  56 #include <linux/init.h>
  57 #include <linux/acpi.h>
  58 #include <linux/dmi.h>
  59 #include <linux/backlight.h>
  60 #include <linux/platform_device.h>
  61 #include <linux/rfkill.h>
  62
  63 #define MSI_DRIVER_VERSION "0.5"
  64
  65 #define MSI_LCD_LEVEL_MAX 9
  66
  67 #define MSI_EC_COMMAND_WIRELESS 0x10
  68 #define MSI_EC_COMMAND_LCD_LEVEL 0x11
  69
  70 #define MSI_STANDARD_EC_COMMAND_ADDRESS 0x2e
  71 #define MSI_STANDARD_EC_BLUETOOTH_MASK  (1 << 0)
  72 #define MSI_STANDARD_EC_WEBCAM_MASK     (1 << 1)
  73 #define MSI_STANDARD_EC_WLAN_MASK       (1 << 3)
  74 #define MSI_STANDARD_EC_3G_MASK         (1 << 4)
  75
  76 /* For set SCM load flag to disable BIOS fn key */
  77 #define MSI_STANDARD_EC_SCM_LOAD_ADDRESS        0x2d
  78 #define MSI_STANDARD_EC_SCM_LOAD_MASK           (1 << 0)
  79
  80 static int msi_laptop_resume(struct platform_device *device);
  81
  82 #define MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS  0x2f
  83
  84 static int force;
  85 module_param(force, bool, 0);
  86 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
  87
  88 static int auto_brightness;
  89 module_param(auto_brightness, int, 0);
  90 MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");
  91
  92 static bool old_ec_model;
  93 static int wlan_s, bluetooth_s, threeg_s;
  94 static int threeg_exists;
  95
  96 /* Some MSI 3G netbook only have one fn key to control Wlan/Bluetooth/3G,
  97  * those netbook will load the SCM (windows app) to disable the original
  98  * Wlan/Bluetooth control by BIOS when user press fn key, then control
  99  * Wlan/Bluetooth/3G by SCM (software control by OS). Without SCM, user
 100  * cann't on/off 3G module on those 3G netbook.
 101  * On Linux, msi-laptop driver will do the same thing to disable the
 102  * original BIOS control, then might need use HAL or other userland
 103  * application to do the software control that simulate with SCM.
 104  * e.g. MSI N034 netbook
 105  */
 106 static bool load_scm_model;
 107 static struct rfkill *rfk_wlan, *rfk_bluetooth, *rfk_threeg;
 108
 109 /* Hardware access */
 110
 111 static int set_lcd_level(int level)
 112 {
 113         u8 buf[2];
 114
 115         if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
 116                 return -EINVAL;
 117
 118         buf[0] = 0x80;
 119         buf[1] = (u8) (level*31);
 120
 121         return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0, 1);
 122 }
 123
 124 static int get_lcd_level(void)
 125 {
 126         u8 wdata = 0, rdata;
 127         int result;
 128
 129         result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1, 1);
 130         if (result < 0)
 131                 return result;
 132
 133         return (int) rdata / 31;
 134 }
 135
 136 static int get_auto_brightness(void)
 137 {
 138         u8 wdata = 4, rdata;
 139         int result;
 140
 141         result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1, 1);
 142         if (result < 0)
 143                 return result;
 144
 145         return !!(rdata & 8);
 146 }
 147
 148 static int set_auto_brightness(int enable)
 149 {
 150         u8 wdata[2], rdata;
 151         int result;
 152
 153         wdata[0] = 4;
 154
 155         result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1, 1);
 156         if (result < 0)
 157                 return result;
 158
 159         wdata[0] = 0x84;
 160         wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);
 161
 162         return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0, 1);
 163 }
 164
 165 static ssize_t set_device_state(const char *buf, size_t count, u8 mask)
 166 {
 167         int status;
 168         u8 wdata = 0, rdata;
 169         int result;
 170
 171         if (sscanf(buf, "%i", &status) != 1 || (status < 0 || status > 1))
 172                 return -EINVAL;
 173
 174         /* read current device state */
 175         result = ec_read(MSI_STANDARD_EC_COMMAND_ADDRESS, &rdata);
 176         if (result < 0)
 177                 return -EINVAL;
 178
 179         if (!!(rdata & mask) != status) {
 180                 /* reverse device bit */
 181                 if (rdata & mask)
 182                         wdata = rdata & ~mask;
 183                 else
 184                         wdata = rdata | mask;
 185
 186                 result = ec_write(MSI_STANDARD_EC_COMMAND_ADDRESS, wdata);
 187                 if (result < 0)
 188                         return -EINVAL;
 189         }
 190
 191         return count;
 192 }
 193
 194 static int get_wireless_state(int *wlan, int *bluetooth)
 195 {
 196         u8 wdata = 0, rdata;
 197         int result;
 198
 199         result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1, 1);
 200         if (result < 0)
 201                 return -1;
 202
 203         if (wlan)
 204                 *wlan = !!(rdata & 8);
 205
 206         if (bluetooth)
 207                 *bluetooth = !!(rdata & 128);
 208
 209         return 0;
 210 }
 211
 212 static int get_wireless_state_ec_standard(void)
 213 {
 214         u8 rdata;
 215         int result;
 216
 217         result = ec_read(MSI_STANDARD_EC_COMMAND_ADDRESS, &rdata);
 218         if (result < 0)
 219                 return -1;
 220
 221         wlan_s = !!(rdata & MSI_STANDARD_EC_WLAN_MASK);
 222
 223         bluetooth_s = !!(rdata & MSI_STANDARD_EC_BLUETOOTH_MASK);
 224
 225         threeg_s = !!(rdata & MSI_STANDARD_EC_3G_MASK);
 226
 227         return 0;
 228 }
 229
 230 static int get_threeg_exists(void)
 231 {
 232         u8 rdata;
 233         int result;
 234
 235         result = ec_read(MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS, &rdata);
 236         if (result < 0)
 237                 return -1;
 238
 239         threeg_exists = !!(rdata & MSI_STANDARD_EC_3G_MASK);
 240
 241         return 0;
 242 }
 243
 244 /* Backlight device stuff */
 245
 246 static int bl_get_brightness(struct backlight_device *b)
 247 {
 248         return get_lcd_level();
 249 }
 250
 251
 252 static int bl_update_status(struct backlight_device *b)
 253 {
 254         return set_lcd_level(b->props.brightness);
 255 }
 256
 257 static struct backlight_ops msibl_ops = {
 258         .get_brightness = bl_get_brightness,
 259         .update_status  = bl_update_status,
 260 };
 261
 262 static struct backlight_device *msibl_device;
 263
 264 /* Platform device */
 265
 266 static ssize_t show_wlan(struct device *dev,
 267         struct device_attribute *attr, char *buf)
 268 {
 269
 270         int ret, enabled;
 271
 272         if (old_ec_model) {
 273                 ret = get_wireless_state(&enabled, NULL);
 274         } else {
 275                 ret = get_wireless_state_ec_standard();
 276                 enabled = wlan_s;
 277         }
 278         if (ret < 0)
 279                 return ret;
 280
 281         return sprintf(buf, "%i\n", enabled);
 282 }
 283
 284 static ssize_t store_wlan(struct device *dev,
 285         struct device_attribute *attr, const char *buf, size_t count)
 286 {
 287         return set_device_state(buf, count, MSI_STANDARD_EC_WLAN_MASK);
 288 }
 289
 290 static ssize_t show_bluetooth(struct device *dev,
 291         struct device_attribute *attr, char *buf)
 292 {
 293
 294         int ret, enabled;
 295
 296         if (old_ec_model) {
 297                 ret = get_wireless_state(NULL, &enabled);
 298         } else {
 299                 ret = get_wireless_state_ec_standard();
 300                 enabled = bluetooth_s;
 301         }
 302         if (ret < 0)
 303                 return ret;
 304
 305         return sprintf(buf, "%i\n", enabled);
 306 }
 307
 308 static ssize_t store_bluetooth(struct device *dev,
 309         struct device_attribute *attr, const char *buf, size_t count)
 310 {
 311         return set_device_state(buf, count, MSI_STANDARD_EC_BLUETOOTH_MASK);
 312 }
 313
 314 static ssize_t show_threeg(struct device *dev,
 315         struct device_attribute *attr, char *buf)
 316 {
 317
 318         int ret;
 319
 320         /* old msi ec not support 3G */
 321         if (old_ec_model)
 322                 return -1;
 323
 324         ret = get_wireless_state_ec_standard();
 325         if (ret < 0)
 326                 return ret;
 327
 328         return sprintf(buf, "%i\n", threeg_s);
 329 }
 330
 331 static ssize_t store_threeg(struct device *dev,
 332         struct device_attribute *attr, const char *buf, size_t count)
 333 {
 334         return set_device_state(buf, count, MSI_STANDARD_EC_3G_MASK);
 335 }
 336
 337 static ssize_t show_lcd_level(struct device *dev,
 338         struct device_attribute *attr, char *buf)
 339 {
 340
 341         int ret;
 342
 343         ret = get_lcd_level();
 344         if (ret < 0)
 345                 return ret;
 346
 347         return sprintf(buf, "%i\n", ret);
 348 }
 349
 350 static ssize_t store_lcd_level(struct device *dev,
 351         struct device_attribute *attr, const char *buf, size_t count)
 352 {
 353
 354         int level, ret;
 355
 356         if (sscanf(buf, "%i", &level) != 1 || (level < 0 || level >= MSI_LCD_LEVEL_MAX))
 357                 return -EINVAL;
 358
 359         ret = set_lcd_level(level);
 360         if (ret < 0)
 361                 return ret;
 362
 363         return count;
 364 }
 365
 366 static ssize_t show_auto_brightness(struct device *dev,
 367         struct device_attribute *attr, char *buf)
 368 {
 369
 370         int ret;
 371
 372         ret = get_auto_brightness();
 373         if (ret < 0)
 374                 return ret;
 375
 376         return sprintf(buf, "%i\n", ret);
 377 }
 378
 379 static ssize_t store_auto_brightness(struct device *dev,
 380         struct device_attribute *attr, const char *buf, size_t count)
 381 {
 382
 383         int enable, ret;
 384
 385         if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
 386                 return -EINVAL;
 387
 388         ret = set_auto_brightness(enable);
 389         if (ret < 0)
 390                 return ret;
 391
 392         return count;
 393 }
 394
 395 static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
 396 static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
 397 static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
 398 static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
 399 static DEVICE_ATTR(threeg, 0444, show_threeg, NULL);
 400
 401 static struct attribute *msipf_attributes[] = {
 402         &dev_attr_lcd_level.attr,
 403         &dev_attr_auto_brightness.attr,
 404         &dev_attr_bluetooth.attr,
 405         &dev_attr_wlan.attr,
 406         NULL
 407 };
 408
 409 static struct attribute_group msipf_attribute_group = {
 410         .attrs = msipf_attributes
 411 };
 412
 413 static struct platform_driver msipf_driver = {
 414         .driver = {
 415                 .name = "msi-laptop-pf",
 416                 .owner = THIS_MODULE,
 417         },
 418         .resume = msi_laptop_resume,
 419 };
 420
 421 static struct platform_device *msipf_device;
 422
 423 /* Initialization */
 424
 425 static int dmi_check_cb(const struct dmi_system_id *id)
 426 {
 427         printk("msi-laptop: Identified laptop model '%s'.\n", id->ident);
 428         return 0;
 429 }
 430
 431 static struct dmi_system_id __initdata msi_dmi_table[] = {
 432         {
 433                 .ident = "MSI S270",
 434                 .matches = {
 435                         DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
 436                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
 437                         DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
 438                         DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
 439                 },
 440                 .callback = dmi_check_cb
 441         },
 442         {
 443                 .ident = "MSI S271",
 444                 .matches = {
 445                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 446                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-1058"),
 447                         DMI_MATCH(DMI_PRODUCT_VERSION, "0581"),
 448                         DMI_MATCH(DMI_BOARD_NAME, "MS-1058")
 449                 },
 450                 .callback = dmi_check_cb
 451         },
 452         {
 453                 .ident = "MSI S420",
 454                 .matches = {
 455                         DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star International"),
 456                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-1412"),
 457                         DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
 458                         DMI_MATCH(DMI_BOARD_NAME, "MS-1412")
 459                 },
 460                 .callback = dmi_check_cb
 461         },
 462         {
 463                 .ident = "Medion MD96100",
 464                 .matches = {
 465                         DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
 466                         DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
 467                         DMI_MATCH(DMI_PRODUCT_VERSION, "0131"),
 468                         DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR INT'L CO.,LTD")
 469                 },
 470                 .callback = dmi_check_cb
 471         },
 472         { }
 473 };
 474
 475 static struct dmi_system_id __initdata msi_load_scm_models_dmi_table[] = {
 476         {
 477                 .ident = "MSI N034",
 478                 .matches = {
 479                         DMI_MATCH(DMI_SYS_VENDOR,
 480                                 "MICRO-STAR INTERNATIONAL CO., LTD"),
 481                         DMI_MATCH(DMI_PRODUCT_NAME, "MS-N034"),
 482                         DMI_MATCH(DMI_CHASSIS_VENDOR,
 483                         "MICRO-STAR INTERNATIONAL CO., LTD")
 484                 },
 485                 .callback = dmi_check_cb
 486         },
 487         { }
 488 };
 489
 490 static int rfkill_bluetooth_set(void *data, bool blocked)
 491 {
 492         /* Do something with blocked...*/
 493         /*
 494          * blocked == false is on
 495          * blocked == true is off
 496          */
 497         if (blocked)
 498                 set_device_state("0", 0, MSI_STANDARD_EC_BLUETOOTH_MASK);
 499         else
 500                 set_device_state("1", 0, MSI_STANDARD_EC_BLUETOOTH_MASK);
 501
 502         return 0;
 503 }
 504
 505 static int rfkill_wlan_set(void *data, bool blocked)
 506 {
 507         if (blocked)
 508                 set_device_state("0", 0, MSI_STANDARD_EC_WLAN_MASK);
 509         else
 510                 set_device_state("1", 0, MSI_STANDARD_EC_WLAN_MASK);
 511
 512         return 0;
 513 }
 514
 515 static int rfkill_threeg_set(void *data, bool blocked)
 516 {
 517         if (blocked)
 518                 set_device_state("0", 0, MSI_STANDARD_EC_3G_MASK);
 519         else
 520                 set_device_state("1", 0, MSI_STANDARD_EC_3G_MASK);
 521
 522         return 0;
 523 }
 524
 525 static struct rfkill_ops rfkill_bluetooth_ops = {
 526         .set_block = rfkill_bluetooth_set
 527 };
 528
 529 static struct rfkill_ops rfkill_wlan_ops = {
 530         .set_block = rfkill_wlan_set
 531 };
 532
 533 static struct rfkill_ops rfkill_threeg_ops = {
 534         .set_block = rfkill_threeg_set
 535 };
 536
 537 static void rfkill_cleanup(void)
 538 {
 539         if (rfk_bluetooth) {
 540                 rfkill_unregister(rfk_bluetooth);
 541                 rfkill_destroy(rfk_bluetooth);
 542         }
 543
 544         if (rfk_threeg) {
 545                 rfkill_unregister(rfk_threeg);
 546                 rfkill_destroy(rfk_threeg);
 547         }
 548
 549         if (rfk_wlan) {
 550                 rfkill_unregister(rfk_wlan);
 551                 rfkill_destroy(rfk_wlan);
 552         }
 553 }
 554
 555 static int rfkill_init(struct platform_device *sdev)
 556 {
 557         /* add rfkill */
 558         int retval;
 559
 560         rfk_bluetooth = rfkill_alloc("msi-bluetooth", &sdev->dev,
 561                                 RFKILL_TYPE_BLUETOOTH,
 562                                 &rfkill_bluetooth_ops, NULL);
 563         if (!rfk_bluetooth) {
 564                 retval = -ENOMEM;
 565                 goto err_bluetooth;
 566         }
 567         retval = rfkill_register(rfk_bluetooth);
 568         if (retval)
 569                 goto err_bluetooth;
 570
 571         rfk_wlan = rfkill_alloc("msi-wlan", &sdev->dev, RFKILL_TYPE_WLAN,
 572                                 &rfkill_wlan_ops, NULL);
 573         if (!rfk_wlan) {
 574                 retval = -ENOMEM;
 575                 goto err_wlan;
 576         }
 577         retval = rfkill_register(rfk_wlan);
 578         if (retval)
 579                 goto err_wlan;
 580
 581         if (threeg_exists) {
 582                 rfk_threeg = rfkill_alloc("msi-threeg", &sdev->dev,
 583                                 RFKILL_TYPE_WWAN, &rfkill_threeg_ops, NULL);
 584                 if (!rfk_threeg) {
 585                         retval = -ENOMEM;
 586                         goto err_threeg;
 587                 }
 588                 retval = rfkill_register(rfk_threeg);
 589                 if (retval)
 590                         goto err_threeg;
 591         }
 592
 593         return 0;
 594
 595 err_threeg:
 596         rfkill_destroy(rfk_threeg);
 597         if (rfk_wlan)
 598                 rfkill_unregister(rfk_wlan);
 599 err_wlan:
 600         rfkill_destroy(rfk_wlan);
 601         if (rfk_bluetooth)
 602                 rfkill_unregister(rfk_bluetooth);
 603 err_bluetooth:
 604         rfkill_destroy(rfk_bluetooth);
 605
 606         return retval;
 607 }
 608
 609 static int msi_laptop_resume(struct platform_device *device)
 610 {
 611         u8 data;
 612         int result;
 613
 614         if (!load_scm_model)
 615                 return 0;
 616
 617         /* set load SCM to disable hardware control by fn key */
 618         result = ec_read(MSI_STANDARD_EC_SCM_LOAD_ADDRESS, &data);
 619         if (result < 0)
 620                 return result;
 621
 622         result = ec_write(MSI_STANDARD_EC_SCM_LOAD_ADDRESS,
 623                 data | MSI_STANDARD_EC_SCM_LOAD_MASK);
 624         if (result < 0)
 625                 return result;
 626
 627         return 0;
 628 }
 629
 630 static int load_scm_model_init(struct platform_device *sdev)
 631 {
 632         u8 data;
 633         int result;
 634
 635         /* allow userland write sysfs file  */
 636         dev_attr_bluetooth.store = store_bluetooth;
 637         dev_attr_wlan.store = store_wlan;
 638         dev_attr_threeg.store = store_threeg;
 639         dev_attr_bluetooth.attr.mode |= S_IWUSR;
 640         dev_attr_wlan.attr.mode |= S_IWUSR;
 641         dev_attr_threeg.attr.mode |= S_IWUSR;
 642
 643         /* disable hardware control by fn key */
 644         result = ec_read(MSI_STANDARD_EC_SCM_LOAD_ADDRESS, &data);
 645         if (result < 0)
 646                 return result;
 647
 648         result = ec_write(MSI_STANDARD_EC_SCM_LOAD_ADDRESS,
 649                 data | MSI_STANDARD_EC_SCM_LOAD_MASK);
 650         if (result < 0)
 651                 return result;
 652
 653         /* initial rfkill */
 654         result = rfkill_init(sdev);
 655         if (result < 0)
 656                 return result;
 657
 658         return 0;
 659 }
 660
 661 static int __init msi_init(void)
 662 {
 663         int ret;
 664
 665         if (acpi_disabled)
 666                 return -ENODEV;
 667
 668         if (force || dmi_check_system(msi_dmi_table))
 669                 old_ec_model = 1;
 670
 671         if (!old_ec_model)
 672                 get_threeg_exists();
 673
 674         if (!old_ec_model && dmi_check_system(msi_load_scm_models_dmi_table))
 675                 load_scm_model = 1;
 676
 677         if (auto_brightness < 0 || auto_brightness > 2)
 678                 return -EINVAL;
 679
 680         /* Register backlight stuff */
 681
 682         if (acpi_video_backlight_support()) {
 683                 printk(KERN_INFO "MSI: Brightness ignored, must be controlled "
 684                        "by ACPI video driver\n");
 685         } else {
 686                 struct backlight_properties props;
 687                 memset(&props, 0, sizeof(struct backlight_properties));
 688                 props.max_brightness = MSI_LCD_LEVEL_MAX - 1;
 689                 msibl_device = backlight_device_register("msi-laptop-bl", NULL,
 690                                                          NULL, &msibl_ops,
 691                                                          &props);
 692                 if (IS_ERR(msibl_device))
 693                         return PTR_ERR(msibl_device);
 694         }
 695
 696         ret = platform_driver_register(&msipf_driver);
 697         if (ret)
 698                 goto fail_backlight;
 699
 700         /* Register platform stuff */
 701
 702         msipf_device = platform_device_alloc("msi-laptop-pf", -1);
 703         if (!msipf_device) {
 704                 ret = -ENOMEM;
 705                 goto fail_platform_driver;
 706         }
 707
 708         ret = platform_device_add(msipf_device);
 709         if (ret)
 710                 goto fail_platform_device1;
 711
 712         if (load_scm_model && (load_scm_model_init(msipf_device) < 0)) {
 713                 ret = -EINVAL;
 714                 goto fail_platform_device1;
 715         }
 716
 717         ret = sysfs_create_group(&msipf_device->dev.kobj, &msipf_attribute_group);
 718         if (ret)
 719                 goto fail_platform_device2;
 720
 721         if (!old_ec_model) {
 722                 if (threeg_exists)
 723                         ret = device_create_file(&msipf_device->dev,
 724                                                 &dev_attr_threeg);
 725                 if (ret)
 726                         goto fail_platform_device2;
 727         }
 728
 729         /* Disable automatic brightness control by default because
 730          * this module was probably loaded to do brightness control in
 731          * software. */
 732
 733         if (auto_brightness != 2)
 734                 set_auto_brightness(auto_brightness);
 735
 736         printk(KERN_INFO "msi-laptop: driver "MSI_DRIVER_VERSION" successfully loaded.\n");
 737
 738         return 0;
 739
 740 fail_platform_device2:
 741
 742         platform_device_del(msipf_device);
 743
 744 fail_platform_device1:
 745
 746         platform_device_put(msipf_device);
 747
 748 fail_platform_driver:
 749
 750         platform_driver_unregister(&msipf_driver);
 751
 752 fail_backlight:
 753
 754         backlight_device_unregister(msibl_device);
 755
 756         return ret;
 757 }
 758
 759 static void __exit msi_cleanup(void)
 760 {
 761
 762         sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
 763         if (!old_ec_model && threeg_exists)
 764                 device_remove_file(&msipf_device->dev, &dev_attr_threeg);
 765         platform_device_unregister(msipf_device);
 766         platform_driver_unregister(&msipf_driver);
 767         backlight_device_unregister(msibl_device);
 768
 769         rfkill_cleanup();
 770
 771         /* Enable automatic brightness control again */
 772         if (auto_brightness != 2)
 773                 set_auto_brightness(1);
 774
 775         printk(KERN_INFO "msi-laptop: driver unloaded.\n");
 776 }
 777
 778 module_init(msi_init);
 779 module_exit(msi_cleanup);
 780
 781 MODULE_AUTHOR("Lennart Poettering");
 782 MODULE_DESCRIPTION("MSI Laptop Support");
 783 MODULE_VERSION(MSI_DRIVER_VERSION);
 784 MODULE_LICENSE("GPL");
 785
 786 MODULE_ALIAS("dmi:*:svnMICRO-STARINT'LCO.,LTD:pnMS-1013:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
 787 MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1058:pvr0581:rvnMSI:rnMS-1058:*:ct10:*");
 788 MODULE_ALIAS("dmi:*:svnMicro-StarInternational:pnMS-1412:*:rvnMSI:rnMS-1412:*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
 789 MODULE_ALIAS("dmi:*:svnNOTEBOOK:pnSAM2000:pvr0131*:cvnMICRO-STARINT'LCO.,LTD:ct10:*");
 790 MODULE_ALIAS("dmi:*:svnMICRO-STARINTERNATIONAL*:pnMS-N034:*");