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/leds.h>
  63 #include <linux/platform_device.h>
  64 #include <linux/slab.h>
  65 #include <acpi/video.h>
  66
  67 #define FUJITSU_DRIVER_VERSION "0.6.0"
  68
  69 #define FUJITSU_LCD_N_LEVELS 8
  70
  71 #define ACPI_FUJITSU_CLASS              "fujitsu"
  72 #define ACPI_FUJITSU_BL_HID             "FUJ02B1"
  73 #define ACPI_FUJITSU_BL_DRIVER_NAME     "Fujitsu laptop FUJ02B1 ACPI brightness driver"
  74 #define ACPI_FUJITSU_BL_DEVICE_NAME     "Fujitsu FUJ02B1"
  75 #define ACPI_FUJITSU_LAPTOP_HID         "FUJ02E3"
  76 #define ACPI_FUJITSU_LAPTOP_DRIVER_NAME "Fujitsu laptop FUJ02E3 ACPI hotkeys driver"
  77 #define ACPI_FUJITSU_LAPTOP_DEVICE_NAME "Fujitsu FUJ02E3"
  78
  79 #define ACPI_FUJITSU_NOTIFY_CODE1     0x80
  80
  81 /* FUNC interface - command values */
  82 #define FUNC_FLAGS      0x1000
  83 #define FUNC_LEDS       0x1001
  84 #define FUNC_BUTTONS    0x1002
  85 #define FUNC_BACKLIGHT  0x1004
  86
  87 /* FUNC interface - responses */
  88 #define UNSUPPORTED_CMD 0x80000000
  89
  90 /* FUNC interface - status flags */
  91 #define FLAG_RFKILL     0x020
  92 #define FLAG_LID        0x100
  93 #define FLAG_DOCK       0x200
  94
  95 /* FUNC interface - LED control */
  96 #define FUNC_LED_OFF    0x1
  97 #define FUNC_LED_ON     0x30001
  98 #define KEYBOARD_LAMPS  0x100
  99 #define LOGOLAMP_POWERON 0x2000
 100 #define LOGOLAMP_ALWAYS  0x4000
 101 #define RADIO_LED_ON    0x20
 102 #define ECO_LED 0x10000
 103 #define ECO_LED_ON      0x80000
 104
 105 /* Hotkey details */
 106 #define KEY1_CODE       0x410   /* codes for the keys in the GIRB register */
 107 #define KEY2_CODE       0x411
 108 #define KEY3_CODE       0x412
 109 #define KEY4_CODE       0x413
 110 #define KEY5_CODE       0x420
 111
 112 #define MAX_HOTKEY_RINGBUFFER_SIZE 100
 113 #define RINGBUFFERSIZE 40
 114
 115 /* Device controlling the backlight and associated keys */
 116 struct fujitsu_bl {
 117         struct input_dev *input;
 118         char phys[32];
 119         struct backlight_device *bl_device;
 120         unsigned int max_brightness;
 121         unsigned int brightness_level;
 122 };
 123
 124 static struct fujitsu_bl *fujitsu_bl;
 125 static int use_alt_lcd_levels = -1;
 126 static bool disable_brightness_adjust;
 127
 128 /* Device used to access hotkeys and other features on the laptop */
 129 struct fujitsu_laptop {
 130         struct input_dev *input;
 131         char phys[32];
 132         struct platform_device *pf_device;
 133         struct kfifo fifo;
 134         spinlock_t fifo_lock;
 135         int flags_supported;
 136         int flags_state;
 137 };
 138
 139 static struct acpi_device *fext;
 140
 141 /* Fujitsu ACPI interface function */
 142
 143 static int call_fext_func(struct acpi_device *device,
 144                           int func, int op, int feature, int state)
 145 {
 146         union acpi_object params[4] = {
 147                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = func },
 148                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = op },
 149                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = feature },
 150                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = state }
 151         };
 152         struct acpi_object_list arg_list = { 4, params };
 153         unsigned long long value;
 154         acpi_status status;
 155
 156         status = acpi_evaluate_integer(device->handle, "FUNC", &arg_list,
 157                                        &value);
 158         if (ACPI_FAILURE(status)) {
 159                 acpi_handle_err(device->handle, "Failed to evaluate FUNC\n");
 160                 return -ENODEV;
 161         }
 162
 163         acpi_handle_debug(device->handle,
 164                           "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
 165                           func, op, feature, state, (int)value);
 166         return value;
 167 }
 168
 169 /* Hardware access for LCD brightness control */
 170
 171 static int set_lcd_level(struct acpi_device *device, int level)
 172 {
 173         struct fujitsu_bl *priv = acpi_driver_data(device);
 174         acpi_status status;
 175         char *method;
 176
 177         switch (use_alt_lcd_levels) {
 178         case -1:
 179                 if (acpi_has_method(device->handle, "SBL2"))
 180                         method = "SBL2";
 181                 else
 182                         method = "SBLL";
 183                 break;
 184         case 1:
 185                 method = "SBL2";
 186                 break;
 187         default:
 188                 method = "SBLL";
 189                 break;
 190         }
 191
 192         acpi_handle_debug(device->handle, "set lcd level via %s [%d]\n", method,
 193                           level);
 194
 195         if (level < 0 || level >= priv->max_brightness)
 196                 return -EINVAL;
 197
 198         status = acpi_execute_simple_method(device->handle, method, level);
 199         if (ACPI_FAILURE(status)) {
 200                 acpi_handle_err(device->handle, "Failed to evaluate %s\n",
 201                                 method);
 202                 return -ENODEV;
 203         }
 204
 205         priv->brightness_level = level;
 206
 207         return 0;
 208 }
 209
 210 static int get_lcd_level(struct acpi_device *device)
 211 {
 212         struct fujitsu_bl *priv = acpi_driver_data(device);
 213         unsigned long long state = 0;
 214         acpi_status status = AE_OK;
 215
 216         acpi_handle_debug(device->handle, "get lcd level via GBLL\n");
 217
 218         status = acpi_evaluate_integer(device->handle, "GBLL", NULL, &state);
 219         if (ACPI_FAILURE(status))
 220                 return 0;
 221
 222         priv->brightness_level = state & 0x0fffffff;
 223
 224         return priv->brightness_level;
 225 }
 226
 227 static int get_max_brightness(struct acpi_device *device)
 228 {
 229         struct fujitsu_bl *priv = acpi_driver_data(device);
 230         unsigned long long state = 0;
 231         acpi_status status = AE_OK;
 232
 233         acpi_handle_debug(device->handle, "get max lcd level via RBLL\n");
 234
 235         status = acpi_evaluate_integer(device->handle, "RBLL", NULL, &state);
 236         if (ACPI_FAILURE(status))
 237                 return -1;
 238
 239         priv->max_brightness = state;
 240
 241         return priv->max_brightness;
 242 }
 243
 244 /* Backlight device stuff */
 245
 246 static int bl_get_brightness(struct backlight_device *b)
 247 {
 248         struct acpi_device *device = bl_get_data(b);
 249
 250         return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(device);
 251 }
 252
 253 static int bl_update_status(struct backlight_device *b)
 254 {
 255         struct acpi_device *device = bl_get_data(b);
 256
 257         if (fext) {
 258                 if (b->props.power == FB_BLANK_POWERDOWN)
 259                         call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
 260                 else
 261                         call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
 262         }
 263
 264         return set_lcd_level(device, b->props.brightness);
 265 }
 266
 267 static const struct backlight_ops fujitsu_bl_ops = {
 268         .get_brightness = bl_get_brightness,
 269         .update_status = bl_update_status,
 270 };
 271
 272 static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
 273                         char *buf)
 274 {
 275         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 276
 277         if (!(priv->flags_supported & FLAG_LID))
 278                 return sprintf(buf, "unknown\n");
 279         if (priv->flags_state & FLAG_LID)
 280                 return sprintf(buf, "open\n");
 281         else
 282                 return sprintf(buf, "closed\n");
 283 }
 284
 285 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 286                          char *buf)
 287 {
 288         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 289
 290         if (!(priv->flags_supported & FLAG_DOCK))
 291                 return sprintf(buf, "unknown\n");
 292         if (priv->flags_state & FLAG_DOCK)
 293                 return sprintf(buf, "docked\n");
 294         else
 295                 return sprintf(buf, "undocked\n");
 296 }
 297
 298 static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
 299                            char *buf)
 300 {
 301         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 302
 303         if (!(priv->flags_supported & FLAG_RFKILL))
 304                 return sprintf(buf, "unknown\n");
 305         if (priv->flags_state & FLAG_RFKILL)
 306                 return sprintf(buf, "on\n");
 307         else
 308                 return sprintf(buf, "killed\n");
 309 }
 310
 311 static DEVICE_ATTR_RO(lid);
 312 static DEVICE_ATTR_RO(dock);
 313 static DEVICE_ATTR_RO(radios);
 314
 315 static struct attribute *fujitsu_pf_attributes[] = {
 316         &dev_attr_lid.attr,
 317         &dev_attr_dock.attr,
 318         &dev_attr_radios.attr,
 319         NULL
 320 };
 321
 322 static const struct attribute_group fujitsu_pf_attribute_group = {
 323         .attrs = fujitsu_pf_attributes
 324 };
 325
 326 static struct platform_driver fujitsu_pf_driver = {
 327         .driver = {
 328                    .name = "fujitsu-laptop",
 329                    }
 330 };
 331
 332 /* ACPI device for LCD brightness control */
 333
 334 static const struct key_entry keymap_backlight[] = {
 335         { KE_KEY, true, { KEY_BRIGHTNESSUP } },
 336         { KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
 337         { KE_END, 0 }
 338 };
 339
 340 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 341 {
 342         struct fujitsu_bl *priv = acpi_driver_data(device);
 343         int ret;
 344
 345         priv->input = devm_input_allocate_device(&device->dev);
 346         if (!priv->input)
 347                 return -ENOMEM;
 348
 349         snprintf(priv->phys, sizeof(priv->phys), "%s/video/input0",
 350                  acpi_device_hid(device));
 351
 352         priv->input->name = acpi_device_name(device);
 353         priv->input->phys = priv->phys;
 354         priv->input->id.bustype = BUS_HOST;
 355         priv->input->id.product = 0x06;
 356
 357         ret = sparse_keymap_setup(priv->input, keymap_backlight, NULL);
 358         if (ret)
 359                 return ret;
 360
 361         return input_register_device(priv->input);
 362 }
 363
 364 static int fujitsu_backlight_register(struct acpi_device *device)
 365 {
 366         struct fujitsu_bl *priv = acpi_driver_data(device);
 367         const struct backlight_properties props = {
 368                 .brightness = priv->brightness_level,
 369                 .max_brightness = priv->max_brightness - 1,
 370                 .type = BACKLIGHT_PLATFORM
 371         };
 372         struct backlight_device *bd;
 373
 374         bd = devm_backlight_device_register(&device->dev, "fujitsu-laptop",
 375                                             &device->dev, device,
 376                                             &fujitsu_bl_ops, &props);
 377         if (IS_ERR(bd))
 378                 return PTR_ERR(bd);
 379
 380         priv->bl_device = bd;
 381
 382         return 0;
 383 }
 384
 385 static int acpi_fujitsu_bl_add(struct acpi_device *device)
 386 {
 387         struct fujitsu_bl *priv;
 388         int error;
 389
 390         if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 391                 return -ENODEV;
 392
 393         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 394         if (!priv)
 395                 return -ENOMEM;
 396
 397         fujitsu_bl = priv;
 398         strcpy(acpi_device_name(device), ACPI_FUJITSU_BL_DEVICE_NAME);
 399         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 400         device->driver_data = priv;
 401
 402         error = acpi_fujitsu_bl_input_setup(device);
 403         if (error)
 404                 return error;
 405
 406         pr_info("ACPI: %s [%s]\n",
 407                 acpi_device_name(device), acpi_device_bid(device));
 408
 409         if (get_max_brightness(device) <= 0)
 410                 priv->max_brightness = FUJITSU_LCD_N_LEVELS;
 411         get_lcd_level(device);
 412
 413         error = fujitsu_backlight_register(device);
 414         if (error)
 415                 return error;
 416
 417         return 0;
 418 }
 419
 420 /* Brightness notify */
 421
 422 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 423 {
 424         struct fujitsu_bl *priv = acpi_driver_data(device);
 425         int oldb, newb;
 426
 427         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
 428                 acpi_handle_info(device->handle, "unsupported event [0x%x]\n",
 429                                  event);
 430                 sparse_keymap_report_event(priv->input, -1, 1, true);
 431                 return;
 432         }
 433
 434         oldb = priv->brightness_level;
 435         get_lcd_level(device);
 436         newb = priv->brightness_level;
 437
 438         acpi_handle_debug(device->handle,
 439                           "brightness button event [%i -> %i]\n", oldb, newb);
 440
 441         if (oldb == newb)
 442                 return;
 443
 444         if (!disable_brightness_adjust)
 445                 set_lcd_level(device, newb);
 446
 447         sparse_keymap_report_event(priv->input, oldb < newb, 1, true);
 448 }
 449
 450 /* ACPI device for hotkey handling */
 451
 452 static const struct key_entry keymap_default[] = {
 453         { KE_KEY, KEY1_CODE, { KEY_PROG1 } },
 454         { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
 455         { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
 456         { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
 457         { KE_KEY, KEY5_CODE, { KEY_RFKILL } },
 458         { KE_KEY, BIT(26),   { KEY_TOUCHPAD_TOGGLE } },
 459         { KE_END, 0 }
 460 };
 461
 462 static const struct key_entry keymap_s64x0[] = {
 463         { KE_KEY, KEY1_CODE, { KEY_SCREENLOCK } },      /* "Lock" */
 464         { KE_KEY, KEY2_CODE, { KEY_HELP } },            /* "Mobility Center */
 465         { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
 466         { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
 467         { KE_END, 0 }
 468 };
 469
 470 static const struct key_entry keymap_p8010[] = {
 471         { KE_KEY, KEY1_CODE, { KEY_HELP } },            /* "Support" */
 472         { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
 473         { KE_KEY, KEY3_CODE, { KEY_SWITCHVIDEOMODE } }, /* "Presentation" */
 474         { KE_KEY, KEY4_CODE, { KEY_WWW } },             /* "WWW" */
 475         { KE_END, 0 }
 476 };
 477
 478 static const struct key_entry *keymap = keymap_default;
 479
 480 static int fujitsu_laptop_dmi_keymap_override(const struct dmi_system_id *id)
 481 {
 482         pr_info("Identified laptop model '%s'\n", id->ident);
 483         keymap = id->driver_data;
 484         return 1;
 485 }
 486
 487 static const struct dmi_system_id fujitsu_laptop_dmi_table[] = {
 488         {
 489                 .callback = fujitsu_laptop_dmi_keymap_override,
 490                 .ident = "Fujitsu Siemens S6410",
 491                 .matches = {
 492                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 493                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
 494                 },
 495                 .driver_data = (void *)keymap_s64x0
 496         },
 497         {
 498                 .callback = fujitsu_laptop_dmi_keymap_override,
 499                 .ident = "Fujitsu Siemens S6420",
 500                 .matches = {
 501                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 502                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
 503                 },
 504                 .driver_data = (void *)keymap_s64x0
 505         },
 506         {
 507                 .callback = fujitsu_laptop_dmi_keymap_override,
 508                 .ident = "Fujitsu LifeBook P8010",
 509                 .matches = {
 510                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 511                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
 512                 },
 513                 .driver_data = (void *)keymap_p8010
 514         },
 515         {}
 516 };
 517
 518 static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
 519 {
 520         struct fujitsu_laptop *priv = acpi_driver_data(device);
 521         int ret;
 522
 523         priv->input = devm_input_allocate_device(&device->dev);
 524         if (!priv->input)
 525                 return -ENOMEM;
 526
 527         snprintf(priv->phys, sizeof(priv->phys), "%s/input0",
 528                  acpi_device_hid(device));
 529
 530         priv->input->name = acpi_device_name(device);
 531         priv->input->phys = priv->phys;
 532         priv->input->id.bustype = BUS_HOST;
 533
 534         dmi_check_system(fujitsu_laptop_dmi_table);
 535         ret = sparse_keymap_setup(priv->input, keymap, NULL);
 536         if (ret)
 537                 return ret;
 538
 539         return input_register_device(priv->input);
 540 }
 541
 542 static int fujitsu_laptop_platform_add(struct acpi_device *device)
 543 {
 544         struct fujitsu_laptop *priv = acpi_driver_data(device);
 545         int ret;
 546
 547         priv->pf_device = platform_device_alloc("fujitsu-laptop", -1);
 548         if (!priv->pf_device)
 549                 return -ENOMEM;
 550
 551         platform_set_drvdata(priv->pf_device, priv);
 552
 553         ret = platform_device_add(priv->pf_device);
 554         if (ret)
 555                 goto err_put_platform_device;
 556
 557         ret = sysfs_create_group(&priv->pf_device->dev.kobj,
 558                                  &fujitsu_pf_attribute_group);
 559         if (ret)
 560                 goto err_del_platform_device;
 561
 562         return 0;
 563
 564 err_del_platform_device:
 565         platform_device_del(priv->pf_device);
 566 err_put_platform_device:
 567         platform_device_put(priv->pf_device);
 568
 569         return ret;
 570 }
 571
 572 static void fujitsu_laptop_platform_remove(struct acpi_device *device)
 573 {
 574         struct fujitsu_laptop *priv = acpi_driver_data(device);
 575
 576         sysfs_remove_group(&priv->pf_device->dev.kobj,
 577                            &fujitsu_pf_attribute_group);
 578         platform_device_unregister(priv->pf_device);
 579 }
 580
 581 static int logolamp_set(struct led_classdev *cdev,
 582                         enum led_brightness brightness)
 583 {
 584         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 585         int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
 586         int ret;
 587
 588         if (brightness < LED_HALF)
 589                 poweron = FUNC_LED_OFF;
 590
 591         if (brightness < LED_FULL)
 592                 always = FUNC_LED_OFF;
 593
 594         ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
 595         if (ret < 0)
 596                 return ret;
 597
 598         return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 599 }
 600
 601 static enum led_brightness logolamp_get(struct led_classdev *cdev)
 602 {
 603         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 604         int ret;
 605
 606         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
 607         if (ret == FUNC_LED_ON)
 608                 return LED_FULL;
 609
 610         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
 611         if (ret == FUNC_LED_ON)
 612                 return LED_HALF;
 613
 614         return LED_OFF;
 615 }
 616
 617 static int kblamps_set(struct led_classdev *cdev,
 618                        enum led_brightness brightness)
 619 {
 620         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 621
 622         if (brightness >= LED_FULL)
 623                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 624                                       FUNC_LED_ON);
 625         else
 626                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 627                                       FUNC_LED_OFF);
 628 }
 629
 630 static enum led_brightness kblamps_get(struct led_classdev *cdev)
 631 {
 632         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 633         enum led_brightness brightness = LED_OFF;
 634
 635         if (call_fext_func(device,
 636                            FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
 637                 brightness = LED_FULL;
 638
 639         return brightness;
 640 }
 641
 642 static int radio_led_set(struct led_classdev *cdev,
 643                          enum led_brightness brightness)
 644 {
 645         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 646
 647         if (brightness >= LED_FULL)
 648                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 649                                       RADIO_LED_ON);
 650         else
 651                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 652                                       0x0);
 653 }
 654
 655 static enum led_brightness radio_led_get(struct led_classdev *cdev)
 656 {
 657         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 658         enum led_brightness brightness = LED_OFF;
 659
 660         if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
 661                 brightness = LED_FULL;
 662
 663         return brightness;
 664 }
 665
 666 static int eco_led_set(struct led_classdev *cdev,
 667                        enum led_brightness brightness)
 668 {
 669         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 670         int curr;
 671
 672         curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
 673         if (brightness >= LED_FULL)
 674                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 675                                       curr | ECO_LED_ON);
 676         else
 677                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 678                                       curr & ~ECO_LED_ON);
 679 }
 680
 681 static enum led_brightness eco_led_get(struct led_classdev *cdev)
 682 {
 683         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 684         enum led_brightness brightness = LED_OFF;
 685
 686         if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
 687                 brightness = LED_FULL;
 688
 689         return brightness;
 690 }
 691
 692 static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 693 {
 694         struct fujitsu_laptop *priv = acpi_driver_data(device);
 695         struct led_classdev *led;
 696         int result;
 697
 698         if (call_fext_func(device,
 699                            FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
 700                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 701                 if (!led)
 702                         return -ENOMEM;
 703
 704                 led->name = "fujitsu::logolamp";
 705                 led->brightness_set_blocking = logolamp_set;
 706                 led->brightness_get = logolamp_get;
 707                 result = devm_led_classdev_register(&device->dev, led);
 708                 if (result)
 709                         return result;
 710         }
 711
 712         if ((call_fext_func(device,
 713                             FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
 714             (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
 715                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 716                 if (!led)
 717                         return -ENOMEM;
 718
 719                 led->name = "fujitsu::kblamps";
 720                 led->brightness_set_blocking = kblamps_set;
 721                 led->brightness_get = kblamps_get;
 722                 result = devm_led_classdev_register(&device->dev, led);
 723                 if (result)
 724                         return result;
 725         }
 726
 727         /*
 728          * Some Fujitsu laptops have a radio toggle button in place of a slide
 729          * switch and all such machines appear to also have an RF LED.  Based on
 730          * comparing DSDT tables of four Fujitsu Lifebook models (E744, E751,
 731          * S7110, S8420; the first one has a radio toggle button, the other
 732          * three have slide switches), bit 17 of flags_supported (the value
 733          * returned by method S000 of ACPI device FUJ02E3) seems to indicate
 734          * whether given model has a radio toggle button.
 735          */
 736         if (priv->flags_supported & BIT(17)) {
 737                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 738                 if (!led)
 739                         return -ENOMEM;
 740
 741                 led->name = "fujitsu::radio_led";
 742                 led->brightness_set_blocking = radio_led_set;
 743                 led->brightness_get = radio_led_get;
 744                 led->default_trigger = "rfkill-any";
 745                 result = devm_led_classdev_register(&device->dev, led);
 746                 if (result)
 747                         return result;
 748         }
 749
 750         /* Support for eco led is not always signaled in bit corresponding
 751          * to the bit used to control the led. According to the DSDT table,
 752          * bit 14 seems to indicate presence of said led as well.
 753          * Confirm by testing the status.
 754          */
 755         if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
 756             (call_fext_func(device,
 757                             FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
 758                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 759                 if (!led)
 760                         return -ENOMEM;
 761
 762                 led->name = "fujitsu::eco_led";
 763                 led->brightness_set_blocking = eco_led_set;
 764                 led->brightness_get = eco_led_get;
 765                 result = devm_led_classdev_register(&device->dev, led);
 766                 if (result)
 767                         return result;
 768         }
 769
 770         return 0;
 771 }
 772
 773 static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 774 {
 775         struct fujitsu_laptop *priv;
 776         int error;
 777         int i;
 778
 779         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 780         if (!priv)
 781                 return -ENOMEM;
 782
 783         WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found.  Driver may not work as intended.");
 784         fext = device;
 785
 786         strcpy(acpi_device_name(device), ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
 787         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 788         device->driver_data = priv;
 789
 790         /* kfifo */
 791         spin_lock_init(&priv->fifo_lock);
 792         error = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
 793                             GFP_KERNEL);
 794         if (error) {
 795                 pr_err("kfifo_alloc failed\n");
 796                 goto err_stop;
 797         }
 798
 799         error = acpi_fujitsu_laptop_input_setup(device);
 800         if (error)
 801                 goto err_free_fifo;
 802
 803         pr_info("ACPI: %s [%s]\n",
 804                 acpi_device_name(device), acpi_device_bid(device));
 805
 806         i = 0;
 807         while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
 808                 && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE)
 809                 ; /* No action, result is discarded */
 810         acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
 811                           i);
 812
 813         priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
 814                                                0x0);
 815
 816         /* Make sure our bitmask of supported functions is cleared if the
 817            RFKILL function block is not implemented, like on the S7020. */
 818         if (priv->flags_supported == UNSUPPORTED_CMD)
 819                 priv->flags_supported = 0;
 820
 821         if (priv->flags_supported)
 822                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 823                                                    0x0);
 824
 825         /* Suspect this is a keymap of the application panel, print it */
 826         acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
 827                          call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
 828
 829         /* Sync backlight power status */
 830         if (fujitsu_bl && fujitsu_bl->bl_device &&
 831             acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 832                 if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
 833                         fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 834                 else
 835                         fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
 836         }
 837
 838         error = acpi_fujitsu_laptop_leds_register(device);
 839         if (error)
 840                 goto err_free_fifo;
 841
 842         error = fujitsu_laptop_platform_add(device);
 843         if (error)
 844                 goto err_free_fifo;
 845
 846         return 0;
 847
 848 err_free_fifo:
 849         kfifo_free(&priv->fifo);
 850 err_stop:
 851         return error;
 852 }
 853
 854 static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
 855 {
 856         struct fujitsu_laptop *priv = acpi_driver_data(device);
 857
 858         fujitsu_laptop_platform_remove(device);
 859
 860         kfifo_free(&priv->fifo);
 861
 862         return 0;
 863 }
 864
 865 static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
 866 {
 867         struct fujitsu_laptop *priv = acpi_driver_data(device);
 868         int status;
 869
 870         status = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
 871                                  sizeof(scancode), &priv->fifo_lock);
 872         if (status != sizeof(scancode)) {
 873                 dev_info(&priv->input->dev, "Could not push scancode [0x%x]\n",
 874                          scancode);
 875                 return;
 876         }
 877         sparse_keymap_report_event(priv->input, scancode, 1, false);
 878         dev_dbg(&priv->input->dev, "Push scancode into ringbuffer [0x%x]\n",
 879                 scancode);
 880 }
 881
 882 static void acpi_fujitsu_laptop_release(struct acpi_device *device)
 883 {
 884         struct fujitsu_laptop *priv = acpi_driver_data(device);
 885         int scancode, status;
 886
 887         while (true) {
 888                 status = kfifo_out_locked(&priv->fifo,
 889                                           (unsigned char *)&scancode,
 890                                           sizeof(scancode), &priv->fifo_lock);
 891                 if (status != sizeof(scancode))
 892                         return;
 893                 sparse_keymap_report_event(priv->input, scancode, 0, false);
 894                 dev_dbg(&priv->input->dev,
 895                         "Pop scancode from ringbuffer [0x%x]\n", scancode);
 896         }
 897 }
 898
 899 static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
 900 {
 901         struct fujitsu_laptop *priv = acpi_driver_data(device);
 902         int scancode, i = 0;
 903         unsigned int irb;
 904
 905         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
 906                 acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
 907                                  event);
 908                 sparse_keymap_report_event(priv->input, -1, 1, true);
 909                 return;
 910         }
 911
 912         if (priv->flags_supported)
 913                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 914                                                    0x0);
 915
 916         while ((irb = call_fext_func(device,
 917                                      FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
 918                i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
 919                 scancode = irb & 0x4ff;
 920                 if (sparse_keymap_entry_from_scancode(priv->input, scancode))
 921                         acpi_fujitsu_laptop_press(device, scancode);
 922                 else if (scancode == 0)
 923                         acpi_fujitsu_laptop_release(device);
 924                 else
 925                         acpi_handle_info(device->handle,
 926                                          "Unknown GIRB result [%x]\n", irb);
 927         }
 928
 929         /* On some models (first seen on the Skylake-based Lifebook
 930          * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
 931          * handled in software; its state is queried using FUNC_FLAGS
 932          */
 933         if ((priv->flags_supported & BIT(26)) &&
 934             (call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
 935                 sparse_keymap_report_event(priv->input, BIT(26), 1, true);
 936 }
 937
 938 /* Initialization */
 939
 940 static const struct acpi_device_id fujitsu_bl_device_ids[] = {
 941         {ACPI_FUJITSU_BL_HID, 0},
 942         {"", 0},
 943 };
 944
 945 static struct acpi_driver acpi_fujitsu_bl_driver = {
 946         .name = ACPI_FUJITSU_BL_DRIVER_NAME,
 947         .class = ACPI_FUJITSU_CLASS,
 948         .ids = fujitsu_bl_device_ids,
 949         .ops = {
 950                 .add = acpi_fujitsu_bl_add,
 951                 .notify = acpi_fujitsu_bl_notify,
 952                 },
 953 };
 954
 955 static const struct acpi_device_id fujitsu_laptop_device_ids[] = {
 956         {ACPI_FUJITSU_LAPTOP_HID, 0},
 957         {"", 0},
 958 };
 959
 960 static struct acpi_driver acpi_fujitsu_laptop_driver = {
 961         .name = ACPI_FUJITSU_LAPTOP_DRIVER_NAME,
 962         .class = ACPI_FUJITSU_CLASS,
 963         .ids = fujitsu_laptop_device_ids,
 964         .ops = {
 965                 .add = acpi_fujitsu_laptop_add,
 966                 .remove = acpi_fujitsu_laptop_remove,
 967                 .notify = acpi_fujitsu_laptop_notify,
 968                 },
 969 };
 970
 971 static const struct acpi_device_id fujitsu_ids[] __used = {
 972         {ACPI_FUJITSU_BL_HID, 0},
 973         {ACPI_FUJITSU_LAPTOP_HID, 0},
 974         {"", 0}
 975 };
 976 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);
 977
 978 static int __init fujitsu_init(void)
 979 {
 980         int ret;
 981
 982         ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
 983         if (ret)
 984                 return ret;
 985
 986         /* Register platform stuff */
 987
 988         ret = platform_driver_register(&fujitsu_pf_driver);
 989         if (ret)
 990                 goto err_unregister_acpi;
 991
 992         /* Register laptop driver */
 993
 994         ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
 995         if (ret)
 996                 goto err_unregister_platform_driver;
 997
 998         pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
 999
1000         return 0;
1001
1002 err_unregister_platform_driver:
1003         platform_driver_unregister(&fujitsu_pf_driver);
1004 err_unregister_acpi:
1005         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1006
1007         return ret;
1008 }
1009
1010 static void __exit fujitsu_cleanup(void)
1011 {
1012         acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
1013
1014         platform_driver_unregister(&fujitsu_pf_driver);
1015
1016         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1017
1018         pr_info("driver unloaded\n");
1019 }
1020
1021 module_init(fujitsu_init);
1022 module_exit(fujitsu_cleanup);
1023
1024 module_param(use_alt_lcd_levels, int, 0644);
1025 MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
1026 module_param(disable_brightness_adjust, bool, 0644);
1027 MODULE_PARM_DESC(disable_brightness_adjust, "Disable LCD brightness adjustment");
1028
1029 MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
1030 MODULE_DESCRIPTION("Fujitsu laptop extras support");
1031 MODULE_VERSION(FUJITSU_DRIVER_VERSION);
1032 MODULE_LICENSE("GPL");