drivers/platform/x86/fujitsu-laptop.c

   1 /*-*-linux-c-*-*/
   2
   3 /*
   4   Copyright (C) 2007,2008 Jonathan Woithe <jwoithe@just42.net>
   5   Copyright (C) 2008 Peter Gruber <nokos@gmx.net>
   6   Copyright (C) 2008 Tony Vroon <tony@linx.net>
   7   Based on earlier work:
   8     Copyright (C) 2003 Shane Spencer <shane@bogomip.com>
   9     Adrian Yee <brewt-fujitsu@brewt.org>
  10
  11   Templated from msi-laptop.c and thinkpad_acpi.c which is copyright
  12   by its respective authors.
  13
  14   This program is free software; you can redistribute it and/or modify
  15   it under the terms of the GNU General Public License as published by
  16   the Free Software Foundation; either version 2 of the License, or
  17   (at your option) any later version.
  18
  19   This program is distributed in the hope that it will be useful, but
  20   WITHOUT ANY WARRANTY; without even the implied warranty of
  21   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22   General Public License for more details.
  23
  24   You should have received a copy of the GNU General Public License
  25   along with this program; if not, write to the Free Software
  26   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  27   02110-1301, USA.
  28  */
  29
  30 /*
  31  * fujitsu-laptop.c - Fujitsu laptop support, providing access to additional
  32  * features made available on a range of Fujitsu laptops including the
  33  * P2xxx/P5xxx/S6xxx/S7xxx series.
  34  *
  35  * This driver implements a vendor-specific backlight control interface for
  36  * Fujitsu laptops and provides support for hotkeys present on certain Fujitsu
  37  * laptops.
  38  *
  39  * This driver has been tested on a Fujitsu Lifebook S6410, S7020 and
  40  * P8010.  It should work on most P-series and S-series Lifebooks, but
  41  * YMMV.
  42  *
  43  * The module parameter use_alt_lcd_levels switches between different ACPI
  44  * brightness controls which are used by different Fujitsu laptops.  In most
  45  * cases the correct method is automatically detected. "use_alt_lcd_levels=1"
  46  * is applicable for a Fujitsu Lifebook S6410 if autodetection fails.
  47  *
  48  */
  49
  50 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  51
  52 #include <linux/module.h>
  53 #include <linux/kernel.h>
  54 #include <linux/init.h>
  55 #include <linux/acpi.h>
  56 #include <linux/dmi.h>
  57 #include <linux/backlight.h>
  58 #include <linux/fb.h>
  59 #include <linux/input.h>
  60 #include <linux/input/sparse-keymap.h>
  61 #include <linux/kfifo.h>
  62 #include <linux/platform_device.h>
  63 #include <linux/slab.h>
  64 #if IS_ENABLED(CONFIG_LEDS_CLASS)
  65 #include <linux/leds.h>
  66 #endif
  67 #include <acpi/video.h>
  68
  69 #define FUJITSU_DRIVER_VERSION "0.6.0"
  70
  71 #define FUJITSU_LCD_N_LEVELS 8
  72
  73 #define ACPI_FUJITSU_CLASS              "fujitsu"
  74 #define ACPI_FUJITSU_BL_HID             "FUJ02B1"
  75 #define ACPI_FUJITSU_BL_DRIVER_NAME     "Fujitsu laptop FUJ02B1 ACPI brightness driver"
  76 #define ACPI_FUJITSU_BL_DEVICE_NAME     "Fujitsu FUJ02B1"
  77 #define ACPI_FUJITSU_LAPTOP_HID         "FUJ02E3"
  78 #define ACPI_FUJITSU_LAPTOP_DRIVER_NAME "Fujitsu laptop FUJ02E3 ACPI hotkeys driver"
  79 #define ACPI_FUJITSU_LAPTOP_DEVICE_NAME "Fujitsu FUJ02E3"
  80
  81 #define ACPI_FUJITSU_NOTIFY_CODE1     0x80
  82
  83 /* FUNC interface - command values */
  84 #define FUNC_FLAGS      0x1000
  85 #define FUNC_LEDS       0x1001
  86 #define FUNC_BUTTONS    0x1002
  87 #define FUNC_BACKLIGHT  0x1004
  88
  89 /* FUNC interface - responses */
  90 #define UNSUPPORTED_CMD 0x80000000
  91
  92 /* FUNC interface - status flags */
  93 #define FLAG_RFKILL     0x020
  94 #define FLAG_LID        0x100
  95 #define FLAG_DOCK       0x200
  96
  97 #if IS_ENABLED(CONFIG_LEDS_CLASS)
  98 /* FUNC interface - LED control */
  99 #define FUNC_LED_OFF    0x1
 100 #define FUNC_LED_ON     0x30001
 101 #define KEYBOARD_LAMPS  0x100
 102 #define LOGOLAMP_POWERON 0x2000
 103 #define LOGOLAMP_ALWAYS  0x4000
 104 #define RADIO_LED_ON    0x20
 105 #define ECO_LED 0x10000
 106 #define ECO_LED_ON      0x80000
 107 #endif
 108
 109 /* Hotkey details */
 110 #define KEY1_CODE       0x410   /* codes for the keys in the GIRB register */
 111 #define KEY2_CODE       0x411
 112 #define KEY3_CODE       0x412
 113 #define KEY4_CODE       0x413
 114 #define KEY5_CODE       0x420
 115
 116 #define MAX_HOTKEY_RINGBUFFER_SIZE 100
 117 #define RINGBUFFERSIZE 40
 118
 119 /* Debugging */
 120 #define FUJLAPTOP_DBG_ERROR       0x0001
 121 #define FUJLAPTOP_DBG_WARN        0x0002
 122 #define FUJLAPTOP_DBG_INFO        0x0004
 123 #define FUJLAPTOP_DBG_TRACE       0x0008
 124
 125 #ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
 126 #define vdbg_printk(a_dbg_level, format, arg...) \
 127         do { if (dbg_level & a_dbg_level) \
 128                 printk(KERN_DEBUG pr_fmt("%s: " format), __func__, ## arg); \
 129         } while (0)
 130 #else
 131 #define vdbg_printk(a_dbg_level, format, arg...) \
 132         do { } while (0)
 133 #endif
 134
 135 /* Device controlling the backlight and associated keys */
 136 struct fujitsu_bl {
 137         acpi_handle acpi_handle;
 138         struct acpi_device *dev;
 139         struct input_dev *input;
 140         char phys[32];
 141         struct backlight_device *bl_device;
 142         int keycode1, keycode2, keycode3, keycode4, keycode5;
 143
 144         unsigned int max_brightness;
 145         unsigned int brightness_changed;
 146         unsigned int brightness_level;
 147 };
 148
 149 static struct fujitsu_bl *fujitsu_bl;
 150 static int use_alt_lcd_levels = -1;
 151 static int disable_brightness_adjust = -1;
 152
 153 /* Device used to access hotkeys and other features on the laptop */
 154 struct fujitsu_laptop {
 155         acpi_handle acpi_handle;
 156         struct acpi_device *dev;
 157         struct input_dev *input;
 158         char phys[32];
 159         struct platform_device *pf_device;
 160         struct kfifo fifo;
 161         spinlock_t fifo_lock;
 162         int flags_supported;
 163         int flags_state;
 164         int logolamp_registered;
 165         int kblamps_registered;
 166         int radio_led_registered;
 167         int eco_led_registered;
 168 };
 169
 170 static struct fujitsu_laptop *fujitsu_laptop;
 171
 172 #if IS_ENABLED(CONFIG_LEDS_CLASS)
 173 static enum led_brightness logolamp_get(struct led_classdev *cdev);
 174 static int logolamp_set(struct led_classdev *cdev,
 175                                enum led_brightness brightness);
 176
 177 static struct led_classdev logolamp_led = {
 178  .name = "fujitsu::logolamp",
 179  .brightness_get = logolamp_get,
 180  .brightness_set_blocking = logolamp_set
 181 };
 182
 183 static enum led_brightness kblamps_get(struct led_classdev *cdev);
 184 static int kblamps_set(struct led_classdev *cdev,
 185                                enum led_brightness brightness);
 186
 187 static struct led_classdev kblamps_led = {
 188  .name = "fujitsu::kblamps",
 189  .brightness_get = kblamps_get,
 190  .brightness_set_blocking = kblamps_set
 191 };
 192
 193 static enum led_brightness radio_led_get(struct led_classdev *cdev);
 194 static int radio_led_set(struct led_classdev *cdev,
 195                                enum led_brightness brightness);
 196
 197 static struct led_classdev radio_led = {
 198  .name = "fujitsu::radio_led",
 199  .default_trigger = "rfkill-any",
 200  .brightness_get = radio_led_get,
 201  .brightness_set_blocking = radio_led_set
 202 };
 203
 204 static enum led_brightness eco_led_get(struct led_classdev *cdev);
 205 static int eco_led_set(struct led_classdev *cdev,
 206                                enum led_brightness brightness);
 207
 208 static struct led_classdev eco_led = {
 209  .name = "fujitsu::eco_led",
 210  .brightness_get = eco_led_get,
 211  .brightness_set_blocking = eco_led_set
 212 };
 213 #endif
 214
 215 #ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
 216 static u32 dbg_level = 0x03;
 217 #endif
 218
 219 /* Fujitsu ACPI interface function */
 220
 221 static int call_fext_func(int cmd, int arg0, int arg1, int arg2)
 222 {
 223         acpi_status status = AE_OK;
 224         union acpi_object params[4] = {
 225         { .type = ACPI_TYPE_INTEGER },
 226         { .type = ACPI_TYPE_INTEGER },
 227         { .type = ACPI_TYPE_INTEGER },
 228         { .type = ACPI_TYPE_INTEGER }
 229         };
 230         struct acpi_object_list arg_list = { 4, &params[0] };
 231         unsigned long long value;
 232         acpi_handle handle = NULL;
 233
 234         status = acpi_get_handle(fujitsu_laptop->acpi_handle, "FUNC", &handle);
 235         if (ACPI_FAILURE(status)) {
 236                 vdbg_printk(FUJLAPTOP_DBG_ERROR,
 237                                 "FUNC interface is not present\n");
 238                 return -ENODEV;
 239         }
 240
 241         params[0].integer.value = cmd;
 242         params[1].integer.value = arg0;
 243         params[2].integer.value = arg1;
 244         params[3].integer.value = arg2;
 245
 246         status = acpi_evaluate_integer(handle, NULL, &arg_list, &value);
 247         if (ACPI_FAILURE(status)) {
 248                 vdbg_printk(FUJLAPTOP_DBG_WARN,
 249                         "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) call failed\n",
 250                                 cmd, arg0, arg1, arg2);
 251                 return -ENODEV;
 252         }
 253
 254         vdbg_printk(FUJLAPTOP_DBG_TRACE,
 255                 "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
 256                         cmd, arg0, arg1, arg2, (int)value);
 257         return value;
 258 }
 259
 260 #if IS_ENABLED(CONFIG_LEDS_CLASS)
 261 /* LED class callbacks */
 262
 263 static int logolamp_set(struct led_classdev *cdev,
 264                                enum led_brightness brightness)
 265 {
 266         int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
 267         int ret;
 268
 269         if (brightness < LED_HALF)
 270                 poweron = FUNC_LED_OFF;
 271
 272         if (brightness < LED_FULL)
 273                 always = FUNC_LED_OFF;
 274
 275         ret = call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
 276         if (ret < 0)
 277                 return ret;
 278
 279         return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 280 }
 281
 282 static int kblamps_set(struct led_classdev *cdev,
 283                                enum led_brightness brightness)
 284 {
 285         if (brightness >= LED_FULL)
 286                 return call_fext_func(FUNC_LEDS, 0x1, KEYBOARD_LAMPS, FUNC_LED_ON);
 287         else
 288                 return call_fext_func(FUNC_LEDS, 0x1, KEYBOARD_LAMPS, FUNC_LED_OFF);
 289 }
 290
 291 static int radio_led_set(struct led_classdev *cdev,
 292                                 enum led_brightness brightness)
 293 {
 294         if (brightness >= LED_FULL)
 295                 return call_fext_func(FUNC_FLAGS, 0x5, RADIO_LED_ON, RADIO_LED_ON);
 296         else
 297                 return call_fext_func(FUNC_FLAGS, 0x5, RADIO_LED_ON, 0x0);
 298 }
 299
 300 static int eco_led_set(struct led_classdev *cdev,
 301                                 enum led_brightness brightness)
 302 {
 303         int curr;
 304
 305         curr = call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0);
 306         if (brightness >= LED_FULL)
 307                 return call_fext_func(FUNC_LEDS, 0x1, ECO_LED, curr | ECO_LED_ON);
 308         else
 309                 return call_fext_func(FUNC_LEDS, 0x1, ECO_LED, curr & ~ECO_LED_ON);
 310 }
 311
 312 static enum led_brightness logolamp_get(struct led_classdev *cdev)
 313 {
 314         int ret;
 315
 316         ret = call_fext_func(FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
 317         if (ret == FUNC_LED_ON)
 318                 return LED_FULL;
 319
 320         ret = call_fext_func(FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
 321         if (ret == FUNC_LED_ON)
 322                 return LED_HALF;
 323
 324         return LED_OFF;
 325 }
 326
 327 static enum led_brightness kblamps_get(struct led_classdev *cdev)
 328 {
 329         enum led_brightness brightness = LED_OFF;
 330
 331         if (call_fext_func(FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
 332                 brightness = LED_FULL;
 333
 334         return brightness;
 335 }
 336
 337 static enum led_brightness radio_led_get(struct led_classdev *cdev)
 338 {
 339         enum led_brightness brightness = LED_OFF;
 340
 341         if (call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
 342                 brightness = LED_FULL;
 343
 344         return brightness;
 345 }
 346
 347 static enum led_brightness eco_led_get(struct led_classdev *cdev)
 348 {
 349         enum led_brightness brightness = LED_OFF;
 350
 351         if (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
 352                 brightness = LED_FULL;
 353
 354         return brightness;
 355 }
 356 #endif
 357
 358 /* Hardware access for LCD brightness control */
 359
 360 static int set_lcd_level(int level)
 361 {
 362         acpi_status status = AE_OK;
 363         acpi_handle handle = NULL;
 364
 365         vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBLL [%d]\n",
 366                     level);
 367
 368         if (level < 0 || level >= fujitsu_bl->max_brightness)
 369                 return -EINVAL;
 370
 371         status = acpi_get_handle(fujitsu_bl->acpi_handle, "SBLL", &handle);
 372         if (ACPI_FAILURE(status)) {
 373                 vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBLL not present\n");
 374                 return -ENODEV;
 375         }
 376
 377
 378         status = acpi_execute_simple_method(handle, NULL, level);
 379         if (ACPI_FAILURE(status))
 380                 return -ENODEV;
 381
 382         return 0;
 383 }
 384
 385 static int set_lcd_level_alt(int level)
 386 {
 387         acpi_status status = AE_OK;
 388         acpi_handle handle = NULL;
 389
 390         vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBL2 [%d]\n",
 391                     level);
 392
 393         if (level < 0 || level >= fujitsu_bl->max_brightness)
 394                 return -EINVAL;
 395
 396         status = acpi_get_handle(fujitsu_bl->acpi_handle, "SBL2", &handle);
 397         if (ACPI_FAILURE(status)) {
 398                 vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBL2 not present\n");
 399                 return -ENODEV;
 400         }
 401
 402         status = acpi_execute_simple_method(handle, NULL, level);
 403         if (ACPI_FAILURE(status))
 404                 return -ENODEV;
 405
 406         return 0;
 407 }
 408
 409 static int get_lcd_level(void)
 410 {
 411         unsigned long long state = 0;
 412         acpi_status status = AE_OK;
 413
 414         vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLL\n");
 415
 416         status = acpi_evaluate_integer(fujitsu_bl->acpi_handle, "GBLL", NULL,
 417                                        &state);
 418         if (ACPI_FAILURE(status))
 419                 return 0;
 420
 421         fujitsu_bl->brightness_level = state & 0x0fffffff;
 422
 423         if (state & 0x80000000)
 424                 fujitsu_bl->brightness_changed = 1;
 425         else
 426                 fujitsu_bl->brightness_changed = 0;
 427
 428         return fujitsu_bl->brightness_level;
 429 }
 430
 431 static int get_max_brightness(void)
 432 {
 433         unsigned long long state = 0;
 434         acpi_status status = AE_OK;
 435
 436         vdbg_printk(FUJLAPTOP_DBG_TRACE, "get max lcd level via RBLL\n");
 437
 438         status = acpi_evaluate_integer(fujitsu_bl->acpi_handle, "RBLL", NULL,
 439                                        &state);
 440         if (ACPI_FAILURE(status))
 441                 return -1;
 442
 443         fujitsu_bl->max_brightness = state;
 444
 445         return fujitsu_bl->max_brightness;
 446 }
 447
 448 /* Backlight device stuff */
 449
 450 static int bl_get_brightness(struct backlight_device *b)
 451 {
 452         return get_lcd_level();
 453 }
 454
 455 static int bl_update_status(struct backlight_device *b)
 456 {
 457         int ret;
 458         if (b->props.power == FB_BLANK_POWERDOWN)
 459                 ret = call_fext_func(FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
 460         else
 461                 ret = call_fext_func(FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
 462         if (ret != 0)
 463                 vdbg_printk(FUJLAPTOP_DBG_ERROR,
 464                         "Unable to adjust backlight power, error code %i\n",
 465                         ret);
 466
 467         if (use_alt_lcd_levels)
 468                 ret = set_lcd_level_alt(b->props.brightness);
 469         else
 470                 ret = set_lcd_level(b->props.brightness);
 471         if (ret != 0)
 472                 vdbg_printk(FUJLAPTOP_DBG_ERROR,
 473                         "Unable to adjust LCD brightness, error code %i\n",
 474                         ret);
 475         return ret;
 476 }
 477
 478 static const struct backlight_ops fujitsu_bl_ops = {
 479         .get_brightness = bl_get_brightness,
 480         .update_status = bl_update_status,
 481 };
 482
 483 static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
 484                         char *buf)
 485 {
 486         if (!(fujitsu_laptop->flags_supported & FLAG_LID))
 487                 return sprintf(buf, "unknown\n");
 488         if (fujitsu_laptop->flags_state & FLAG_LID)
 489                 return sprintf(buf, "open\n");
 490         else
 491                 return sprintf(buf, "closed\n");
 492 }
 493
 494 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 495                          char *buf)
 496 {
 497         if (!(fujitsu_laptop->flags_supported & FLAG_DOCK))
 498                 return sprintf(buf, "unknown\n");
 499         if (fujitsu_laptop->flags_state & FLAG_DOCK)
 500                 return sprintf(buf, "docked\n");
 501         else
 502                 return sprintf(buf, "undocked\n");
 503 }
 504
 505 static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
 506                            char *buf)
 507 {
 508         if (!(fujitsu_laptop->flags_supported & FLAG_RFKILL))
 509                 return sprintf(buf, "unknown\n");
 510         if (fujitsu_laptop->flags_state & FLAG_RFKILL)
 511                 return sprintf(buf, "on\n");
 512         else
 513                 return sprintf(buf, "killed\n");
 514 }
 515
 516 static DEVICE_ATTR_RO(lid);
 517 static DEVICE_ATTR_RO(dock);
 518 static DEVICE_ATTR_RO(radios);
 519
 520 static struct attribute *fujitsu_pf_attributes[] = {
 521         &dev_attr_lid.attr,
 522         &dev_attr_dock.attr,
 523         &dev_attr_radios.attr,
 524         NULL
 525 };
 526
 527 static struct attribute_group fujitsu_pf_attribute_group = {
 528         .attrs = fujitsu_pf_attributes
 529 };
 530
 531 static struct platform_driver fujitsu_pf_driver = {
 532         .driver = {
 533                    .name = "fujitsu-laptop",
 534                    }
 535 };
 536
 537 static void __init dmi_check_cb_common(const struct dmi_system_id *id)
 538 {
 539         pr_info("Identified laptop model '%s'\n", id->ident);
 540 }
 541
 542 static int __init dmi_check_cb_s6410(const struct dmi_system_id *id)
 543 {
 544         dmi_check_cb_common(id);
 545         fujitsu_bl->keycode1 = KEY_SCREENLOCK;  /* "Lock" */
 546         fujitsu_bl->keycode2 = KEY_HELP;        /* "Mobility Center" */
 547         return 1;
 548 }
 549
 550 static int __init dmi_check_cb_s6420(const struct dmi_system_id *id)
 551 {
 552         dmi_check_cb_common(id);
 553         fujitsu_bl->keycode1 = KEY_SCREENLOCK;  /* "Lock" */
 554         fujitsu_bl->keycode2 = KEY_HELP;        /* "Mobility Center" */
 555         return 1;
 556 }
 557
 558 static int __init dmi_check_cb_p8010(const struct dmi_system_id *id)
 559 {
 560         dmi_check_cb_common(id);
 561         fujitsu_bl->keycode1 = KEY_HELP;                /* "Support" */
 562         fujitsu_bl->keycode3 = KEY_SWITCHVIDEOMODE;     /* "Presentation" */
 563         fujitsu_bl->keycode4 = KEY_WWW;                 /* "Internet" */
 564         return 1;
 565 }
 566
 567 static const struct dmi_system_id fujitsu_dmi_table[] __initconst = {
 568         {
 569          .ident = "Fujitsu Siemens S6410",
 570          .matches = {
 571                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 572                      DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
 573                      },
 574          .callback = dmi_check_cb_s6410},
 575         {
 576          .ident = "Fujitsu Siemens S6420",
 577          .matches = {
 578                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 579                      DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
 580                      },
 581          .callback = dmi_check_cb_s6420},
 582         {
 583          .ident = "Fujitsu LifeBook P8010",
 584          .matches = {
 585                      DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 586                      DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
 587                      },
 588          .callback = dmi_check_cb_p8010},
 589         {}
 590 };
 591
 592 /* ACPI device for LCD brightness control */
 593
 594 static const struct key_entry keymap_backlight[] = {
 595         { KE_KEY, true, { KEY_BRIGHTNESSUP } },
 596         { KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
 597         { KE_END, 0 }
 598 };
 599
 600 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 601 {
 602         struct fujitsu_bl *fujitsu_bl = acpi_driver_data(device);
 603         int ret;
 604
 605         fujitsu_bl->input = devm_input_allocate_device(&device->dev);
 606         if (!fujitsu_bl->input)
 607                 return -ENOMEM;
 608
 609         snprintf(fujitsu_bl->phys, sizeof(fujitsu_bl->phys),
 610                  "%s/video/input0", acpi_device_hid(device));
 611
 612         fujitsu_bl->input->name = acpi_device_name(device);
 613         fujitsu_bl->input->phys = fujitsu_bl->phys;
 614         fujitsu_bl->input->id.bustype = BUS_HOST;
 615         fujitsu_bl->input->id.product = 0x06;
 616
 617         ret = sparse_keymap_setup(fujitsu_bl->input, keymap_backlight, NULL);
 618         if (ret)
 619                 return ret;
 620
 621         return input_register_device(fujitsu_bl->input);
 622 }
 623
 624 static int fujitsu_backlight_register(void)
 625 {
 626         struct backlight_properties props = {
 627                 .brightness = fujitsu_bl->brightness_level,
 628                 .max_brightness = fujitsu_bl->max_brightness - 1,
 629                 .type = BACKLIGHT_PLATFORM
 630         };
 631         struct backlight_device *bd;
 632
 633         bd = backlight_device_register("fujitsu-laptop", NULL, NULL,
 634                                        &fujitsu_bl_ops, &props);
 635         if (IS_ERR(bd))
 636                 return PTR_ERR(bd);
 637
 638         fujitsu_bl->bl_device = bd;
 639
 640         return 0;
 641 }
 642
 643 static int acpi_fujitsu_bl_add(struct acpi_device *device)
 644 {
 645         int state = 0;
 646         int error;
 647
 648         if (!device)
 649                 return -EINVAL;
 650
 651         fujitsu_bl->acpi_handle = device->handle;
 652         sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_BL_DEVICE_NAME);
 653         sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
 654         device->driver_data = fujitsu_bl;
 655
 656         error = acpi_fujitsu_bl_input_setup(device);
 657         if (error)
 658                 return error;
 659
 660         error = acpi_bus_update_power(fujitsu_bl->acpi_handle, &state);
 661         if (error) {
 662                 pr_err("Error reading power state\n");
 663                 return error;
 664         }
 665
 666         pr_info("ACPI: %s [%s] (%s)\n",
 667                acpi_device_name(device), acpi_device_bid(device),
 668                !device->power.state ? "on" : "off");
 669
 670         fujitsu_bl->dev = device;
 671
 672         if (acpi_has_method(device->handle, METHOD_NAME__INI)) {
 673                 vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
 674                 if (ACPI_FAILURE
 675                     (acpi_evaluate_object
 676                      (device->handle, METHOD_NAME__INI, NULL, NULL)))
 677                         pr_err("_INI Method failed\n");
 678         }
 679
 680         if (use_alt_lcd_levels == -1) {
 681                 if (acpi_has_method(NULL, "\\_SB.PCI0.LPCB.FJEX.SBL2"))
 682                         use_alt_lcd_levels = 1;
 683                 else
 684                         use_alt_lcd_levels = 0;
 685                 vdbg_printk(FUJLAPTOP_DBG_TRACE, "auto-detected usealt as %i\n",
 686                             use_alt_lcd_levels);
 687         }
 688
 689         /* do config (detect defaults) */
 690         use_alt_lcd_levels = use_alt_lcd_levels == 1 ? 1 : 0;
 691         disable_brightness_adjust = disable_brightness_adjust == 1 ? 1 : 0;
 692         vdbg_printk(FUJLAPTOP_DBG_INFO,
 693                     "config: [alt interface: %d], [adjust disable: %d]\n",
 694                     use_alt_lcd_levels, disable_brightness_adjust);
 695
 696         if (get_max_brightness() <= 0)
 697                 fujitsu_bl->max_brightness = FUJITSU_LCD_N_LEVELS;
 698         get_lcd_level();
 699
 700         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 701                 error = fujitsu_backlight_register();
 702                 if (error)
 703                         return error;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int acpi_fujitsu_bl_remove(struct acpi_device *device)
 710 {
 711         struct fujitsu_bl *fujitsu_bl = acpi_driver_data(device);
 712
 713         backlight_device_unregister(fujitsu_bl->bl_device);
 714
 715         fujitsu_bl->acpi_handle = NULL;
 716
 717         return 0;
 718 }
 719
 720 /* Brightness notify */
 721
 722 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 723 {
 724         struct input_dev *input;
 725         int oldb, newb;
 726
 727         input = fujitsu_bl->input;
 728
 729         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
 730                 vdbg_printk(FUJLAPTOP_DBG_WARN,
 731                             "unsupported event [0x%x]\n", event);
 732                 sparse_keymap_report_event(input, -1, 1, true);
 733                 return;
 734         }
 735
 736         oldb = fujitsu_bl->brightness_level;
 737         get_lcd_level();
 738         newb = fujitsu_bl->brightness_level;
 739
 740         vdbg_printk(FUJLAPTOP_DBG_TRACE,
 741                     "brightness button event [%i -> %i (%i)]\n",
 742                     oldb, newb, fujitsu_bl->brightness_changed);
 743
 744         if (oldb == newb)
 745                 return;
 746
 747         if (disable_brightness_adjust != 1) {
 748                 if (use_alt_lcd_levels)
 749                         set_lcd_level_alt(newb);
 750                 else
 751                         set_lcd_level(newb);
 752         }
 753
 754         sparse_keymap_report_event(input, oldb < newb, 1, true);
 755 }
 756
 757 /* ACPI device for hotkey handling */
 758
 759 static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
 760 {
 761         struct fujitsu_laptop *fujitsu_laptop = acpi_driver_data(device);
 762
 763         fujitsu_laptop->input = devm_input_allocate_device(&device->dev);
 764         if (!fujitsu_laptop->input)
 765                 return -ENOMEM;
 766
 767         snprintf(fujitsu_laptop->phys, sizeof(fujitsu_laptop->phys),
 768                  "%s/video/input0", acpi_device_hid(device));
 769
 770         fujitsu_laptop->input->name = acpi_device_name(device);
 771         fujitsu_laptop->input->phys = fujitsu_laptop->phys;
 772         fujitsu_laptop->input->id.bustype = BUS_HOST;
 773         fujitsu_laptop->input->id.product = 0x06;
 774
 775         set_bit(EV_KEY, fujitsu_laptop->input->evbit);
 776         set_bit(fujitsu_bl->keycode1, fujitsu_laptop->input->keybit);
 777         set_bit(fujitsu_bl->keycode2, fujitsu_laptop->input->keybit);
 778         set_bit(fujitsu_bl->keycode3, fujitsu_laptop->input->keybit);
 779         set_bit(fujitsu_bl->keycode4, fujitsu_laptop->input->keybit);
 780         set_bit(fujitsu_bl->keycode5, fujitsu_laptop->input->keybit);
 781         set_bit(KEY_TOUCHPAD_TOGGLE, fujitsu_laptop->input->keybit);
 782         set_bit(KEY_UNKNOWN, fujitsu_laptop->input->keybit);
 783
 784         return input_register_device(fujitsu_laptop->input);
 785 }
 786
 787 static int fujitsu_laptop_platform_add(void)
 788 {
 789         int ret;
 790
 791         fujitsu_laptop->pf_device = platform_device_alloc("fujitsu-laptop", -1);
 792         if (!fujitsu_laptop->pf_device)
 793                 return -ENOMEM;
 794
 795         ret = platform_device_add(fujitsu_laptop->pf_device);
 796         if (ret)
 797                 goto err_put_platform_device;
 798
 799         ret = sysfs_create_group(&fujitsu_laptop->pf_device->dev.kobj,
 800                                  &fujitsu_pf_attribute_group);
 801         if (ret)
 802                 goto err_del_platform_device;
 803
 804         return 0;
 805
 806 err_del_platform_device:
 807         platform_device_del(fujitsu_laptop->pf_device);
 808 err_put_platform_device:
 809         platform_device_put(fujitsu_laptop->pf_device);
 810
 811         return ret;
 812 }
 813
 814 static void fujitsu_laptop_platform_remove(void)
 815 {
 816         sysfs_remove_group(&fujitsu_laptop->pf_device->dev.kobj,
 817                            &fujitsu_pf_attribute_group);
 818         platform_device_unregister(fujitsu_laptop->pf_device);
 819 }
 820
 821 static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 822 {
 823         int result = 0;
 824         int state = 0;
 825         int error;
 826         int i;
 827
 828         if (!device)
 829                 return -EINVAL;
 830
 831         fujitsu_laptop->acpi_handle = device->handle;
 832         sprintf(acpi_device_name(device), "%s",
 833                 ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
 834         sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
 835         device->driver_data = fujitsu_laptop;
 836
 837         /* kfifo */
 838         spin_lock_init(&fujitsu_laptop->fifo_lock);
 839         error = kfifo_alloc(&fujitsu_laptop->fifo, RINGBUFFERSIZE * sizeof(int),
 840                         GFP_KERNEL);
 841         if (error) {
 842                 pr_err("kfifo_alloc failed\n");
 843                 goto err_stop;
 844         }
 845
 846         error = acpi_fujitsu_laptop_input_setup(device);
 847         if (error)
 848                 goto err_free_fifo;
 849
 850         error = acpi_bus_update_power(fujitsu_laptop->acpi_handle, &state);
 851         if (error) {
 852                 pr_err("Error reading power state\n");
 853                 goto err_free_fifo;
 854         }
 855
 856         pr_info("ACPI: %s [%s] (%s)\n",
 857                 acpi_device_name(device), acpi_device_bid(device),
 858                 !device->power.state ? "on" : "off");
 859
 860         fujitsu_laptop->dev = device;
 861
 862         if (acpi_has_method(device->handle, METHOD_NAME__INI)) {
 863                 vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
 864                 if (ACPI_FAILURE
 865                     (acpi_evaluate_object
 866                      (device->handle, METHOD_NAME__INI, NULL, NULL)))
 867                         pr_err("_INI Method failed\n");
 868         }
 869
 870         i = 0;
 871         while (call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
 872                 && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE)
 873                 ; /* No action, result is discarded */
 874         vdbg_printk(FUJLAPTOP_DBG_INFO, "Discarded %i ringbuffer entries\n", i);
 875
 876         fujitsu_laptop->flags_supported =
 877                 call_fext_func(FUNC_FLAGS, 0x0, 0x0, 0x0);
 878
 879         /* Make sure our bitmask of supported functions is cleared if the
 880            RFKILL function block is not implemented, like on the S7020. */
 881         if (fujitsu_laptop->flags_supported == UNSUPPORTED_CMD)
 882                 fujitsu_laptop->flags_supported = 0;
 883
 884         if (fujitsu_laptop->flags_supported)
 885                 fujitsu_laptop->flags_state =
 886                         call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0);
 887
 888         /* Suspect this is a keymap of the application panel, print it */
 889         pr_info("BTNI: [0x%x]\n", call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0));
 890
 891         /* Sync backlight power status */
 892         if (fujitsu_bl->bl_device &&
 893             acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 894                 if (call_fext_func(FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
 895                         fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 896                 else
 897                         fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
 898         }
 899
 900         error = fujitsu_laptop_platform_add();
 901         if (error)
 902                 goto err_free_fifo;
 903
 904 #if IS_ENABLED(CONFIG_LEDS_CLASS)
 905         if (call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
 906                 result = led_classdev_register(&fujitsu_laptop->pf_device->dev,
 907                                                 &logolamp_led);
 908                 if (result == 0) {
 909                         fujitsu_laptop->logolamp_registered = 1;
 910                 } else {
 911                         pr_err("Could not register LED handler for logo lamp, error %i\n",
 912                                result);
 913                 }
 914         }
 915
 916         if ((call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
 917            (call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
 918                 result = led_classdev_register(&fujitsu_laptop->pf_device->dev,
 919                                                 &kblamps_led);
 920                 if (result == 0) {
 921                         fujitsu_laptop->kblamps_registered = 1;
 922                 } else {
 923                         pr_err("Could not register LED handler for keyboard lamps, error %i\n",
 924                                result);
 925                 }
 926         }
 927
 928         /*
 929          * BTNI bit 24 seems to indicate the presence of a radio toggle
 930          * button in place of a slide switch, and all such machines appear
 931          * to also have an RF LED.  Therefore use bit 24 as an indicator
 932          * that an RF LED is present.
 933          */
 934         if (call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
 935                 result = led_classdev_register(&fujitsu_laptop->pf_device->dev,
 936                                                 &radio_led);
 937                 if (result == 0) {
 938                         fujitsu_laptop->radio_led_registered = 1;
 939                 } else {
 940                         pr_err("Could not register LED handler for radio LED, error %i\n",
 941                                result);
 942                 }
 943         }
 944
 945         /* Support for eco led is not always signaled in bit corresponding
 946          * to the bit used to control the led. According to the DSDT table,
 947          * bit 14 seems to indicate presence of said led as well.
 948          * Confirm by testing the status.
 949         */
 950         if ((call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
 951            (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
 952                 result = led_classdev_register(&fujitsu_laptop->pf_device->dev,
 953                                                 &eco_led);
 954                 if (result == 0) {
 955                         fujitsu_laptop->eco_led_registered = 1;
 956                 } else {
 957                         pr_err("Could not register LED handler for eco LED, error %i\n",
 958                                result);
 959                 }
 960         }
 961 #endif
 962
 963         return result;
 964
 965 err_free_fifo:
 966         kfifo_free(&fujitsu_laptop->fifo);
 967 err_stop:
 968         return error;
 969 }
 970
 971 static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
 972 {
 973         struct fujitsu_laptop *fujitsu_laptop = acpi_driver_data(device);
 974
 975 #if IS_ENABLED(CONFIG_LEDS_CLASS)
 976         if (fujitsu_laptop->logolamp_registered)
 977                 led_classdev_unregister(&logolamp_led);
 978
 979         if (fujitsu_laptop->kblamps_registered)
 980                 led_classdev_unregister(&kblamps_led);
 981
 982         if (fujitsu_laptop->radio_led_registered)
 983                 led_classdev_unregister(&radio_led);
 984
 985         if (fujitsu_laptop->eco_led_registered)
 986                 led_classdev_unregister(&eco_led);
 987 #endif
 988
 989         fujitsu_laptop_platform_remove();
 990
 991         kfifo_free(&fujitsu_laptop->fifo);
 992
 993         fujitsu_laptop->acpi_handle = NULL;
 994
 995         return 0;
 996 }
 997
 998 static void acpi_fujitsu_laptop_press(int keycode)
 999 {
1000         struct input_dev *input = fujitsu_laptop->input;
1001         int status;
1002
1003         status = kfifo_in_locked(&fujitsu_laptop->fifo,
1004                                  (unsigned char *)&keycode, sizeof(keycode),
1005                                  &fujitsu_laptop->fifo_lock);
1006         if (status != sizeof(keycode)) {
1007                 vdbg_printk(FUJLAPTOP_DBG_WARN,
1008                             "Could not push keycode [0x%x]\n", keycode);
1009                 return;
1010         }
1011         input_report_key(input, keycode, 1);
1012         input_sync(input);
1013         vdbg_printk(FUJLAPTOP_DBG_TRACE,
1014                     "Push keycode into ringbuffer [%d]\n", keycode);
1015 }
1016
1017 static void acpi_fujitsu_laptop_release(void)
1018 {
1019         struct input_dev *input = fujitsu_laptop->input;
1020         int keycode, status;
1021
1022         while (true) {
1023                 status = kfifo_out_locked(&fujitsu_laptop->fifo,
1024                                           (unsigned char *)&keycode,
1025                                           sizeof(keycode),
1026                                           &fujitsu_laptop->fifo_lock);
1027                 if (status != sizeof(keycode))
1028                         return;
1029                 input_report_key(input, keycode, 0);
1030                 input_sync(input);
1031                 vdbg_printk(FUJLAPTOP_DBG_TRACE,
1032                             "Pop keycode from ringbuffer [%d]\n", keycode);
1033         }
1034 }
1035
1036 static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
1037 {
1038         struct input_dev *input;
1039         int keycode;
1040         unsigned int irb = 1;
1041         int i;
1042
1043         input = fujitsu_laptop->input;
1044
1045         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
1046                 keycode = KEY_UNKNOWN;
1047                 vdbg_printk(FUJLAPTOP_DBG_WARN,
1048                             "Unsupported event [0x%x]\n", event);
1049                 input_report_key(input, keycode, 1);
1050                 input_sync(input);
1051                 input_report_key(input, keycode, 0);
1052                 input_sync(input);
1053                 return;
1054         }
1055
1056         if (fujitsu_laptop->flags_supported)
1057                 fujitsu_laptop->flags_state =
1058                         call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0);
1059
1060         i = 0;
1061         while ((irb =
1062                 call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0
1063                         && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) {
1064                 switch (irb & 0x4ff) {
1065                 case KEY1_CODE:
1066                         keycode = fujitsu_bl->keycode1;
1067                         break;
1068                 case KEY2_CODE:
1069                         keycode = fujitsu_bl->keycode2;
1070                         break;
1071                 case KEY3_CODE:
1072                         keycode = fujitsu_bl->keycode3;
1073                         break;
1074                 case KEY4_CODE:
1075                         keycode = fujitsu_bl->keycode4;
1076                         break;
1077                 case KEY5_CODE:
1078                         keycode = fujitsu_bl->keycode5;
1079                         break;
1080                 case 0:
1081                         keycode = 0;
1082                         break;
1083                 default:
1084                         vdbg_printk(FUJLAPTOP_DBG_WARN,
1085                                     "Unknown GIRB result [%x]\n", irb);
1086                         keycode = -1;
1087                         break;
1088                 }
1089
1090                 if (keycode > 0)
1091                         acpi_fujitsu_laptop_press(keycode);
1092                 else if (keycode == 0)
1093                         acpi_fujitsu_laptop_release();
1094         }
1095
1096         /* On some models (first seen on the Skylake-based Lifebook
1097          * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
1098          * handled in software; its state is queried using FUNC_FLAGS
1099          */
1100         if ((fujitsu_laptop->flags_supported & BIT(26)) &&
1101             (call_fext_func(FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26))) {
1102                 keycode = KEY_TOUCHPAD_TOGGLE;
1103                 input_report_key(input, keycode, 1);
1104                 input_sync(input);
1105                 input_report_key(input, keycode, 0);
1106                 input_sync(input);
1107         }
1108
1109 }
1110
1111 /* Initialization */
1112
1113 static const struct acpi_device_id fujitsu_bl_device_ids[] = {
1114         {ACPI_FUJITSU_BL_HID, 0},
1115         {"", 0},
1116 };
1117
1118 static struct acpi_driver acpi_fujitsu_bl_driver = {
1119         .name = ACPI_FUJITSU_BL_DRIVER_NAME,
1120         .class = ACPI_FUJITSU_CLASS,
1121         .ids = fujitsu_bl_device_ids,
1122         .ops = {
1123                 .add = acpi_fujitsu_bl_add,
1124                 .remove = acpi_fujitsu_bl_remove,
1125                 .notify = acpi_fujitsu_bl_notify,
1126                 },
1127 };
1128
1129 static const struct acpi_device_id fujitsu_laptop_device_ids[] = {
1130         {ACPI_FUJITSU_LAPTOP_HID, 0},
1131         {"", 0},
1132 };
1133
1134 static struct acpi_driver acpi_fujitsu_laptop_driver = {
1135         .name = ACPI_FUJITSU_LAPTOP_DRIVER_NAME,
1136         .class = ACPI_FUJITSU_CLASS,
1137         .ids = fujitsu_laptop_device_ids,
1138         .ops = {
1139                 .add = acpi_fujitsu_laptop_add,
1140                 .remove = acpi_fujitsu_laptop_remove,
1141                 .notify = acpi_fujitsu_laptop_notify,
1142                 },
1143 };
1144
1145 static const struct acpi_device_id fujitsu_ids[] __used = {
1146         {ACPI_FUJITSU_BL_HID, 0},
1147         {ACPI_FUJITSU_LAPTOP_HID, 0},
1148         {"", 0}
1149 };
1150 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);
1151
1152 static int __init fujitsu_init(void)
1153 {
1154         int ret;
1155
1156         if (acpi_disabled)
1157                 return -ENODEV;
1158
1159         fujitsu_bl = kzalloc(sizeof(struct fujitsu_bl), GFP_KERNEL);
1160         if (!fujitsu_bl)
1161                 return -ENOMEM;
1162         fujitsu_bl->keycode1 = KEY_PROG1;
1163         fujitsu_bl->keycode2 = KEY_PROG2;
1164         fujitsu_bl->keycode3 = KEY_PROG3;
1165         fujitsu_bl->keycode4 = KEY_PROG4;
1166         fujitsu_bl->keycode5 = KEY_RFKILL;
1167         dmi_check_system(fujitsu_dmi_table);
1168
1169         ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
1170         if (ret)
1171                 goto err_free_fujitsu_bl;
1172
1173         /* Register platform stuff */
1174
1175         ret = platform_driver_register(&fujitsu_pf_driver);
1176         if (ret)
1177                 goto err_unregister_acpi;
1178
1179         /* Register laptop driver */
1180
1181         fujitsu_laptop = kzalloc(sizeof(struct fujitsu_laptop), GFP_KERNEL);
1182         if (!fujitsu_laptop) {
1183                 ret = -ENOMEM;
1184                 goto err_unregister_platform_driver;
1185         }
1186
1187         ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
1188         if (ret)
1189                 goto err_free_fujitsu_laptop;
1190
1191         pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
1192
1193         return 0;
1194
1195 err_free_fujitsu_laptop:
1196         kfree(fujitsu_laptop);
1197 err_unregister_platform_driver:
1198         platform_driver_unregister(&fujitsu_pf_driver);
1199 err_unregister_acpi:
1200         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1201 err_free_fujitsu_bl:
1202         kfree(fujitsu_bl);
1203
1204         return ret;
1205 }
1206
1207 static void __exit fujitsu_cleanup(void)
1208 {
1209         acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
1210
1211         kfree(fujitsu_laptop);
1212
1213         platform_driver_unregister(&fujitsu_pf_driver);
1214
1215         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1216
1217         kfree(fujitsu_bl);
1218
1219         pr_info("driver unloaded\n");
1220 }
1221
1222 module_init(fujitsu_init);
1223 module_exit(fujitsu_cleanup);
1224
1225 module_param(use_alt_lcd_levels, uint, 0644);
1226 MODULE_PARM_DESC(use_alt_lcd_levels,
1227                  "Use alternative interface for lcd_levels (needed for Lifebook s6410).");
1228 module_param(disable_brightness_adjust, uint, 0644);
1229 MODULE_PARM_DESC(disable_brightness_adjust, "Disable brightness adjustment .");
1230 #ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
1231 module_param_named(debug, dbg_level, uint, 0644);
1232 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
1233 #endif
1234
1235 MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
1236 MODULE_DESCRIPTION("Fujitsu laptop extras support");
1237 MODULE_VERSION(FUJITSU_DRIVER_VERSION);
1238 MODULE_LICENSE("GPL");