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/bitops.h>
  57 #include <linux/dmi.h>
  58 #include <linux/backlight.h>
  59 #include <linux/fb.h>
  60 #include <linux/input.h>
  61 #include <linux/input/sparse-keymap.h>
  62 #include <linux/kfifo.h>
  63 #include <linux/leds.h>
  64 #include <linux/platform_device.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_CODE        0x80
  80
  81 /* FUNC interface - command values */
  82 #define FUNC_FLAGS                      BIT(12)
  83 #define FUNC_LEDS                       (BIT(12) | BIT(0))
  84 #define FUNC_BUTTONS                    (BIT(12) | BIT(1))
  85 #define FUNC_BACKLIGHT                  (BIT(12) | BIT(2))
  86
  87 /* FUNC interface - responses */
  88 #define UNSUPPORTED_CMD                 0x80000000
  89
  90 /* FUNC interface - status flags */
  91 #define FLAG_RFKILL                     BIT(5)
  92 #define FLAG_LID                        BIT(8)
  93 #define FLAG_DOCK                       BIT(9)
  94 #define FLAG_TOUCHPAD_TOGGLE            BIT(26)
  95 #define FLAG_MICMUTE                    BIT(29)
  96 #define FLAG_SOFTKEYS                   (FLAG_RFKILL | FLAG_TOUCHPAD_TOGGLE | FLAG_MICMUTE)
  97
  98 /* FUNC interface - LED control */
  99 #define FUNC_LED_OFF                    BIT(0)
 100 #define FUNC_LED_ON                     (BIT(0) | BIT(16) | BIT(17))
 101 #define LOGOLAMP_POWERON                BIT(13)
 102 #define LOGOLAMP_ALWAYS                 BIT(14)
 103 #define KEYBOARD_LAMPS                  BIT(8)
 104 #define RADIO_LED_ON                    BIT(5)
 105 #define ECO_LED                         BIT(16)
 106 #define ECO_LED_ON                      BIT(19)
 107
 108 /* FUNC interface - backlight power control */
 109 #define BACKLIGHT_PARAM_POWER           BIT(2)
 110 #define BACKLIGHT_OFF                   (BIT(0) | BIT(1))
 111 #define BACKLIGHT_ON                    0
 112
 113 /* Scancodes read from the GIRB register */
 114 #define KEY1_CODE                       0x410
 115 #define KEY2_CODE                       0x411
 116 #define KEY3_CODE                       0x412
 117 #define KEY4_CODE                       0x413
 118 #define KEY5_CODE                       0x420
 119
 120 /* Hotkey ringbuffer limits */
 121 #define MAX_HOTKEY_RINGBUFFER_SIZE      100
 122 #define RINGBUFFERSIZE                  40
 123
 124 /* Module parameters */
 125 static int use_alt_lcd_levels = -1;
 126 static bool disable_brightness_adjust;
 127
 128 /* Device controlling the backlight and associated keys */
 129 struct fujitsu_bl {
 130         struct input_dev *input;
 131         char phys[32];
 132         struct backlight_device *bl_device;
 133         unsigned int max_brightness;
 134         unsigned int brightness_level;
 135 };
 136
 137 static struct fujitsu_bl *fujitsu_bl;
 138
 139 /* Device used to access hotkeys and other features on the laptop */
 140 struct fujitsu_laptop {
 141         struct input_dev *input;
 142         char phys[32];
 143         struct platform_device *pf_device;
 144         struct kfifo fifo;
 145         spinlock_t fifo_lock;
 146         int flags_supported;
 147         int flags_state;
 148 };
 149
 150 static struct acpi_device *fext;
 151
 152 /* Fujitsu ACPI interface function */
 153
 154 static int call_fext_func(struct acpi_device *device,
 155                           int func, int op, int feature, int state)
 156 {
 157         union acpi_object params[4] = {
 158                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = func },
 159                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = op },
 160                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = feature },
 161                 { .integer.type = ACPI_TYPE_INTEGER, .integer.value = state }
 162         };
 163         struct acpi_object_list arg_list = { 4, params };
 164         unsigned long long value;
 165         acpi_status status;
 166
 167         status = acpi_evaluate_integer(device->handle, "FUNC", &arg_list,
 168                                        &value);
 169         if (ACPI_FAILURE(status)) {
 170                 acpi_handle_err(device->handle, "Failed to evaluate FUNC\n");
 171                 return -ENODEV;
 172         }
 173
 174         acpi_handle_debug(device->handle,
 175                           "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
 176                           func, op, feature, state, (int)value);
 177         return value;
 178 }
 179
 180 /* Hardware access for LCD brightness control */
 181
 182 static int set_lcd_level(struct acpi_device *device, int level)
 183 {
 184         struct fujitsu_bl *priv = acpi_driver_data(device);
 185         acpi_status status;
 186         char *method;
 187
 188         switch (use_alt_lcd_levels) {
 189         case -1:
 190                 if (acpi_has_method(device->handle, "SBL2"))
 191                         method = "SBL2";
 192                 else
 193                         method = "SBLL";
 194                 break;
 195         case 1:
 196                 method = "SBL2";
 197                 break;
 198         default:
 199                 method = "SBLL";
 200                 break;
 201         }
 202
 203         acpi_handle_debug(device->handle, "set lcd level via %s [%d]\n", method,
 204                           level);
 205
 206         if (level < 0 || level >= priv->max_brightness)
 207                 return -EINVAL;
 208
 209         status = acpi_execute_simple_method(device->handle, method, level);
 210         if (ACPI_FAILURE(status)) {
 211                 acpi_handle_err(device->handle, "Failed to evaluate %s\n",
 212                                 method);
 213                 return -ENODEV;
 214         }
 215
 216         priv->brightness_level = level;
 217
 218         return 0;
 219 }
 220
 221 static int get_lcd_level(struct acpi_device *device)
 222 {
 223         struct fujitsu_bl *priv = acpi_driver_data(device);
 224         unsigned long long state = 0;
 225         acpi_status status = AE_OK;
 226
 227         acpi_handle_debug(device->handle, "get lcd level via GBLL\n");
 228
 229         status = acpi_evaluate_integer(device->handle, "GBLL", NULL, &state);
 230         if (ACPI_FAILURE(status))
 231                 return 0;
 232
 233         priv->brightness_level = state & 0x0fffffff;
 234
 235         return priv->brightness_level;
 236 }
 237
 238 static int get_max_brightness(struct acpi_device *device)
 239 {
 240         struct fujitsu_bl *priv = acpi_driver_data(device);
 241         unsigned long long state = 0;
 242         acpi_status status = AE_OK;
 243
 244         acpi_handle_debug(device->handle, "get max lcd level via RBLL\n");
 245
 246         status = acpi_evaluate_integer(device->handle, "RBLL", NULL, &state);
 247         if (ACPI_FAILURE(status))
 248                 return -1;
 249
 250         priv->max_brightness = state;
 251
 252         return priv->max_brightness;
 253 }
 254
 255 /* Backlight device stuff */
 256
 257 static int bl_get_brightness(struct backlight_device *b)
 258 {
 259         struct acpi_device *device = bl_get_data(b);
 260
 261         return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(device);
 262 }
 263
 264 static int bl_update_status(struct backlight_device *b)
 265 {
 266         struct acpi_device *device = bl_get_data(b);
 267
 268         if (fext) {
 269                 if (b->props.power == FB_BLANK_POWERDOWN)
 270                         call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
 271                                        BACKLIGHT_PARAM_POWER, BACKLIGHT_OFF);
 272                 else
 273                         call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
 274                                        BACKLIGHT_PARAM_POWER, BACKLIGHT_ON);
 275         }
 276
 277         return set_lcd_level(device, b->props.brightness);
 278 }
 279
 280 static const struct backlight_ops fujitsu_bl_ops = {
 281         .get_brightness = bl_get_brightness,
 282         .update_status = bl_update_status,
 283 };
 284
 285 static ssize_t lid_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_LID))
 291                 return sprintf(buf, "unknown\n");
 292         if (priv->flags_state & FLAG_LID)
 293                 return sprintf(buf, "open\n");
 294         else
 295                 return sprintf(buf, "closed\n");
 296 }
 297
 298 static ssize_t dock_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_DOCK))
 304                 return sprintf(buf, "unknown\n");
 305         if (priv->flags_state & FLAG_DOCK)
 306                 return sprintf(buf, "docked\n");
 307         else
 308                 return sprintf(buf, "undocked\n");
 309 }
 310
 311 static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
 312                            char *buf)
 313 {
 314         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 315
 316         if (!(priv->flags_supported & FLAG_RFKILL))
 317                 return sprintf(buf, "unknown\n");
 318         if (priv->flags_state & FLAG_RFKILL)
 319                 return sprintf(buf, "on\n");
 320         else
 321                 return sprintf(buf, "killed\n");
 322 }
 323
 324 static DEVICE_ATTR_RO(lid);
 325 static DEVICE_ATTR_RO(dock);
 326 static DEVICE_ATTR_RO(radios);
 327
 328 static struct attribute *fujitsu_pf_attributes[] = {
 329         &dev_attr_lid.attr,
 330         &dev_attr_dock.attr,
 331         &dev_attr_radios.attr,
 332         NULL
 333 };
 334
 335 static const struct attribute_group fujitsu_pf_attribute_group = {
 336         .attrs = fujitsu_pf_attributes
 337 };
 338
 339 static struct platform_driver fujitsu_pf_driver = {
 340         .driver = {
 341                    .name = "fujitsu-laptop",
 342                    }
 343 };
 344
 345 /* ACPI device for LCD brightness control */
 346
 347 static const struct key_entry keymap_backlight[] = {
 348         { KE_KEY, true, { KEY_BRIGHTNESSUP } },
 349         { KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
 350         { KE_END, 0 }
 351 };
 352
 353 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 354 {
 355         struct fujitsu_bl *priv = acpi_driver_data(device);
 356         int ret;
 357
 358         priv->input = devm_input_allocate_device(&device->dev);
 359         if (!priv->input)
 360                 return -ENOMEM;
 361
 362         snprintf(priv->phys, sizeof(priv->phys), "%s/video/input0",
 363                  acpi_device_hid(device));
 364
 365         priv->input->name = acpi_device_name(device);
 366         priv->input->phys = priv->phys;
 367         priv->input->id.bustype = BUS_HOST;
 368         priv->input->id.product = 0x06;
 369
 370         ret = sparse_keymap_setup(priv->input, keymap_backlight, NULL);
 371         if (ret)
 372                 return ret;
 373
 374         return input_register_device(priv->input);
 375 }
 376
 377 static int fujitsu_backlight_register(struct acpi_device *device)
 378 {
 379         struct fujitsu_bl *priv = acpi_driver_data(device);
 380         const struct backlight_properties props = {
 381                 .brightness = priv->brightness_level,
 382                 .max_brightness = priv->max_brightness - 1,
 383                 .type = BACKLIGHT_PLATFORM
 384         };
 385         struct backlight_device *bd;
 386
 387         bd = devm_backlight_device_register(&device->dev, "fujitsu-laptop",
 388                                             &device->dev, device,
 389                                             &fujitsu_bl_ops, &props);
 390         if (IS_ERR(bd))
 391                 return PTR_ERR(bd);
 392
 393         priv->bl_device = bd;
 394
 395         return 0;
 396 }
 397
 398 static int acpi_fujitsu_bl_add(struct acpi_device *device)
 399 {
 400         struct fujitsu_bl *priv;
 401         int ret;
 402
 403         if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 404                 return -ENODEV;
 405
 406         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 407         if (!priv)
 408                 return -ENOMEM;
 409
 410         fujitsu_bl = priv;
 411         strcpy(acpi_device_name(device), ACPI_FUJITSU_BL_DEVICE_NAME);
 412         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 413         device->driver_data = priv;
 414
 415         pr_info("ACPI: %s [%s]\n",
 416                 acpi_device_name(device), acpi_device_bid(device));
 417
 418         if (get_max_brightness(device) <= 0)
 419                 priv->max_brightness = FUJITSU_LCD_N_LEVELS;
 420         get_lcd_level(device);
 421
 422         ret = acpi_fujitsu_bl_input_setup(device);
 423         if (ret)
 424                 return ret;
 425
 426         return fujitsu_backlight_register(device);
 427 }
 428
 429 /* Brightness notify */
 430
 431 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 432 {
 433         struct fujitsu_bl *priv = acpi_driver_data(device);
 434         int oldb, newb;
 435
 436         if (event != ACPI_FUJITSU_NOTIFY_CODE) {
 437                 acpi_handle_info(device->handle, "unsupported event [0x%x]\n",
 438                                  event);
 439                 sparse_keymap_report_event(priv->input, -1, 1, true);
 440                 return;
 441         }
 442
 443         oldb = priv->brightness_level;
 444         get_lcd_level(device);
 445         newb = priv->brightness_level;
 446
 447         acpi_handle_debug(device->handle,
 448                           "brightness button event [%i -> %i]\n", oldb, newb);
 449
 450         if (oldb == newb)
 451                 return;
 452
 453         if (!disable_brightness_adjust)
 454                 set_lcd_level(device, newb);
 455
 456         sparse_keymap_report_event(priv->input, oldb < newb, 1, true);
 457 }
 458
 459 /* ACPI device for hotkey handling */
 460
 461 static const struct key_entry keymap_default[] = {
 462         { KE_KEY, KEY1_CODE,            { KEY_PROG1 } },
 463         { KE_KEY, KEY2_CODE,            { KEY_PROG2 } },
 464         { KE_KEY, KEY3_CODE,            { KEY_PROG3 } },
 465         { KE_KEY, KEY4_CODE,            { KEY_PROG4 } },
 466         { KE_KEY, KEY5_CODE,            { KEY_RFKILL } },
 467         /* Soft keys read from status flags */
 468         { KE_KEY, FLAG_RFKILL,          { KEY_RFKILL } },
 469         { KE_KEY, FLAG_TOUCHPAD_TOGGLE, { KEY_TOUCHPAD_TOGGLE } },
 470         { KE_KEY, FLAG_MICMUTE,         { KEY_MICMUTE } },
 471         { KE_END, 0 }
 472 };
 473
 474 static const struct key_entry keymap_s64x0[] = {
 475         { KE_KEY, KEY1_CODE, { KEY_SCREENLOCK } },      /* "Lock" */
 476         { KE_KEY, KEY2_CODE, { KEY_HELP } },            /* "Mobility Center */
 477         { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
 478         { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
 479         { KE_END, 0 }
 480 };
 481
 482 static const struct key_entry keymap_p8010[] = {
 483         { KE_KEY, KEY1_CODE, { KEY_HELP } },            /* "Support" */
 484         { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
 485         { KE_KEY, KEY3_CODE, { KEY_SWITCHVIDEOMODE } }, /* "Presentation" */
 486         { KE_KEY, KEY4_CODE, { KEY_WWW } },             /* "WWW" */
 487         { KE_END, 0 }
 488 };
 489
 490 static const struct key_entry *keymap = keymap_default;
 491
 492 static int fujitsu_laptop_dmi_keymap_override(const struct dmi_system_id *id)
 493 {
 494         pr_info("Identified laptop model '%s'\n", id->ident);
 495         keymap = id->driver_data;
 496         return 1;
 497 }
 498
 499 static const struct dmi_system_id fujitsu_laptop_dmi_table[] = {
 500         {
 501                 .callback = fujitsu_laptop_dmi_keymap_override,
 502                 .ident = "Fujitsu Siemens S6410",
 503                 .matches = {
 504                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 505                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
 506                 },
 507                 .driver_data = (void *)keymap_s64x0
 508         },
 509         {
 510                 .callback = fujitsu_laptop_dmi_keymap_override,
 511                 .ident = "Fujitsu Siemens S6420",
 512                 .matches = {
 513                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 514                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
 515                 },
 516                 .driver_data = (void *)keymap_s64x0
 517         },
 518         {
 519                 .callback = fujitsu_laptop_dmi_keymap_override,
 520                 .ident = "Fujitsu LifeBook P8010",
 521                 .matches = {
 522                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 523                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
 524                 },
 525                 .driver_data = (void *)keymap_p8010
 526         },
 527         {}
 528 };
 529
 530 static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
 531 {
 532         struct fujitsu_laptop *priv = acpi_driver_data(device);
 533         int ret;
 534
 535         priv->input = devm_input_allocate_device(&device->dev);
 536         if (!priv->input)
 537                 return -ENOMEM;
 538
 539         snprintf(priv->phys, sizeof(priv->phys), "%s/input0",
 540                  acpi_device_hid(device));
 541
 542         priv->input->name = acpi_device_name(device);
 543         priv->input->phys = priv->phys;
 544         priv->input->id.bustype = BUS_HOST;
 545
 546         dmi_check_system(fujitsu_laptop_dmi_table);
 547         ret = sparse_keymap_setup(priv->input, keymap, NULL);
 548         if (ret)
 549                 return ret;
 550
 551         return input_register_device(priv->input);
 552 }
 553
 554 static int fujitsu_laptop_platform_add(struct acpi_device *device)
 555 {
 556         struct fujitsu_laptop *priv = acpi_driver_data(device);
 557         int ret;
 558
 559         priv->pf_device = platform_device_alloc("fujitsu-laptop", -1);
 560         if (!priv->pf_device)
 561                 return -ENOMEM;
 562
 563         platform_set_drvdata(priv->pf_device, priv);
 564
 565         ret = platform_device_add(priv->pf_device);
 566         if (ret)
 567                 goto err_put_platform_device;
 568
 569         ret = sysfs_create_group(&priv->pf_device->dev.kobj,
 570                                  &fujitsu_pf_attribute_group);
 571         if (ret)
 572                 goto err_del_platform_device;
 573
 574         return 0;
 575
 576 err_del_platform_device:
 577         platform_device_del(priv->pf_device);
 578 err_put_platform_device:
 579         platform_device_put(priv->pf_device);
 580
 581         return ret;
 582 }
 583
 584 static void fujitsu_laptop_platform_remove(struct acpi_device *device)
 585 {
 586         struct fujitsu_laptop *priv = acpi_driver_data(device);
 587
 588         sysfs_remove_group(&priv->pf_device->dev.kobj,
 589                            &fujitsu_pf_attribute_group);
 590         platform_device_unregister(priv->pf_device);
 591 }
 592
 593 static int logolamp_set(struct led_classdev *cdev,
 594                         enum led_brightness brightness)
 595 {
 596         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 597         int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
 598         int ret;
 599
 600         if (brightness < LED_HALF)
 601                 poweron = FUNC_LED_OFF;
 602
 603         if (brightness < LED_FULL)
 604                 always = FUNC_LED_OFF;
 605
 606         ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
 607         if (ret < 0)
 608                 return ret;
 609
 610         return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 611 }
 612
 613 static enum led_brightness logolamp_get(struct led_classdev *cdev)
 614 {
 615         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 616         int ret;
 617
 618         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
 619         if (ret == FUNC_LED_ON)
 620                 return LED_FULL;
 621
 622         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
 623         if (ret == FUNC_LED_ON)
 624                 return LED_HALF;
 625
 626         return LED_OFF;
 627 }
 628
 629 static int kblamps_set(struct led_classdev *cdev,
 630                        enum led_brightness brightness)
 631 {
 632         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 633
 634         if (brightness >= LED_FULL)
 635                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 636                                       FUNC_LED_ON);
 637         else
 638                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 639                                       FUNC_LED_OFF);
 640 }
 641
 642 static enum led_brightness kblamps_get(struct led_classdev *cdev)
 643 {
 644         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 645         enum led_brightness brightness = LED_OFF;
 646
 647         if (call_fext_func(device,
 648                            FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
 649                 brightness = LED_FULL;
 650
 651         return brightness;
 652 }
 653
 654 static int radio_led_set(struct led_classdev *cdev,
 655                          enum led_brightness brightness)
 656 {
 657         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 658
 659         if (brightness >= LED_FULL)
 660                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 661                                       RADIO_LED_ON);
 662         else
 663                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 664                                       0x0);
 665 }
 666
 667 static enum led_brightness radio_led_get(struct led_classdev *cdev)
 668 {
 669         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 670         enum led_brightness brightness = LED_OFF;
 671
 672         if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
 673                 brightness = LED_FULL;
 674
 675         return brightness;
 676 }
 677
 678 static int eco_led_set(struct led_classdev *cdev,
 679                        enum led_brightness brightness)
 680 {
 681         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 682         int curr;
 683
 684         curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
 685         if (brightness >= LED_FULL)
 686                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 687                                       curr | ECO_LED_ON);
 688         else
 689                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 690                                       curr & ~ECO_LED_ON);
 691 }
 692
 693 static enum led_brightness eco_led_get(struct led_classdev *cdev)
 694 {
 695         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 696         enum led_brightness brightness = LED_OFF;
 697
 698         if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
 699                 brightness = LED_FULL;
 700
 701         return brightness;
 702 }
 703
 704 static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 705 {
 706         struct fujitsu_laptop *priv = acpi_driver_data(device);
 707         struct led_classdev *led;
 708         int ret;
 709
 710         if (call_fext_func(device,
 711                            FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
 712                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 713                 if (!led)
 714                         return -ENOMEM;
 715
 716                 led->name = "fujitsu::logolamp";
 717                 led->brightness_set_blocking = logolamp_set;
 718                 led->brightness_get = logolamp_get;
 719                 ret = devm_led_classdev_register(&device->dev, led);
 720                 if (ret)
 721                         return ret;
 722         }
 723
 724         if ((call_fext_func(device,
 725                             FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
 726             (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
 727                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 728                 if (!led)
 729                         return -ENOMEM;
 730
 731                 led->name = "fujitsu::kblamps";
 732                 led->brightness_set_blocking = kblamps_set;
 733                 led->brightness_get = kblamps_get;
 734                 ret = devm_led_classdev_register(&device->dev, led);
 735                 if (ret)
 736                         return ret;
 737         }
 738
 739         /*
 740          * Some Fujitsu laptops have a radio toggle button in place of a slide
 741          * switch and all such machines appear to also have an RF LED.  Based on
 742          * comparing DSDT tables of four Fujitsu Lifebook models (E744, E751,
 743          * S7110, S8420; the first one has a radio toggle button, the other
 744          * three have slide switches), bit 17 of flags_supported (the value
 745          * returned by method S000 of ACPI device FUJ02E3) seems to indicate
 746          * whether given model has a radio toggle button.
 747          */
 748         if (priv->flags_supported & BIT(17)) {
 749                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 750                 if (!led)
 751                         return -ENOMEM;
 752
 753                 led->name = "fujitsu::radio_led";
 754                 led->brightness_set_blocking = radio_led_set;
 755                 led->brightness_get = radio_led_get;
 756                 led->default_trigger = "rfkill-any";
 757                 ret = devm_led_classdev_register(&device->dev, led);
 758                 if (ret)
 759                         return ret;
 760         }
 761
 762         /* Support for eco led is not always signaled in bit corresponding
 763          * to the bit used to control the led. According to the DSDT table,
 764          * bit 14 seems to indicate presence of said led as well.
 765          * Confirm by testing the status.
 766          */
 767         if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
 768             (call_fext_func(device,
 769                             FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
 770                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 771                 if (!led)
 772                         return -ENOMEM;
 773
 774                 led->name = "fujitsu::eco_led";
 775                 led->brightness_set_blocking = eco_led_set;
 776                 led->brightness_get = eco_led_get;
 777                 ret = devm_led_classdev_register(&device->dev, led);
 778                 if (ret)
 779                         return ret;
 780         }
 781
 782         return 0;
 783 }
 784
 785 static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 786 {
 787         struct fujitsu_laptop *priv;
 788         int ret, i = 0;
 789
 790         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 791         if (!priv)
 792                 return -ENOMEM;
 793
 794         WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found.  Driver may not work as intended.");
 795         fext = device;
 796
 797         strcpy(acpi_device_name(device), ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
 798         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 799         device->driver_data = priv;
 800
 801         /* kfifo */
 802         spin_lock_init(&priv->fifo_lock);
 803         ret = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
 804                           GFP_KERNEL);
 805         if (ret)
 806                 return ret;
 807
 808         pr_info("ACPI: %s [%s]\n",
 809                 acpi_device_name(device), acpi_device_bid(device));
 810
 811         while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0 &&
 812                i++ < MAX_HOTKEY_RINGBUFFER_SIZE)
 813                 ; /* No action, result is discarded */
 814         acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
 815                           i);
 816
 817         priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
 818                                                0x0);
 819
 820         /* Make sure our bitmask of supported functions is cleared if the
 821            RFKILL function block is not implemented, like on the S7020. */
 822         if (priv->flags_supported == UNSUPPORTED_CMD)
 823                 priv->flags_supported = 0;
 824
 825         if (priv->flags_supported)
 826                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 827                                                    0x0);
 828
 829         /* Suspect this is a keymap of the application panel, print it */
 830         acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
 831                          call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
 832
 833         /* Sync backlight power status */
 834         if (fujitsu_bl && fujitsu_bl->bl_device &&
 835             acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 836                 if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2,
 837                                    BACKLIGHT_PARAM_POWER, 0x0) == BACKLIGHT_OFF)
 838                         fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 839                 else
 840                         fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
 841         }
 842
 843         ret = acpi_fujitsu_laptop_input_setup(device);
 844         if (ret)
 845                 goto err_free_fifo;
 846
 847         ret = acpi_fujitsu_laptop_leds_register(device);
 848         if (ret)
 849                 goto err_free_fifo;
 850
 851         ret = fujitsu_laptop_platform_add(device);
 852         if (ret)
 853                 goto err_free_fifo;
 854
 855         return 0;
 856
 857 err_free_fifo:
 858         kfifo_free(&priv->fifo);
 859
 860         return ret;
 861 }
 862
 863 static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
 864 {
 865         struct fujitsu_laptop *priv = acpi_driver_data(device);
 866
 867         fujitsu_laptop_platform_remove(device);
 868
 869         kfifo_free(&priv->fifo);
 870
 871         return 0;
 872 }
 873
 874 static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
 875 {
 876         struct fujitsu_laptop *priv = acpi_driver_data(device);
 877         int ret;
 878
 879         ret = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
 880                               sizeof(scancode), &priv->fifo_lock);
 881         if (ret != sizeof(scancode)) {
 882                 dev_info(&priv->input->dev, "Could not push scancode [0x%x]\n",
 883                          scancode);
 884                 return;
 885         }
 886         sparse_keymap_report_event(priv->input, scancode, 1, false);
 887         dev_dbg(&priv->input->dev, "Push scancode into ringbuffer [0x%x]\n",
 888                 scancode);
 889 }
 890
 891 static void acpi_fujitsu_laptop_release(struct acpi_device *device)
 892 {
 893         struct fujitsu_laptop *priv = acpi_driver_data(device);
 894         int scancode, ret;
 895
 896         while (true) {
 897                 ret = kfifo_out_locked(&priv->fifo, (unsigned char *)&scancode,
 898                                        sizeof(scancode), &priv->fifo_lock);
 899                 if (ret != sizeof(scancode))
 900                         return;
 901                 sparse_keymap_report_event(priv->input, scancode, 0, false);
 902                 dev_dbg(&priv->input->dev,
 903                         "Pop scancode from ringbuffer [0x%x]\n", scancode);
 904         }
 905 }
 906
 907 static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
 908 {
 909         struct fujitsu_laptop *priv = acpi_driver_data(device);
 910         unsigned long flags;
 911         int scancode, i = 0;
 912         unsigned int irb;
 913
 914         if (event != ACPI_FUJITSU_NOTIFY_CODE) {
 915                 acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
 916                                  event);
 917                 sparse_keymap_report_event(priv->input, -1, 1, true);
 918                 return;
 919         }
 920
 921         if (priv->flags_supported)
 922                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 923                                                    0x0);
 924
 925         while ((irb = call_fext_func(device,
 926                                      FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
 927                i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
 928                 scancode = irb & 0x4ff;
 929                 if (sparse_keymap_entry_from_scancode(priv->input, scancode))
 930                         acpi_fujitsu_laptop_press(device, scancode);
 931                 else if (scancode == 0)
 932                         acpi_fujitsu_laptop_release(device);
 933                 else
 934                         acpi_handle_info(device->handle,
 935                                          "Unknown GIRB result [%x]\n", irb);
 936         }
 937
 938         /*
 939          * First seen on the Skylake-based Lifebook E736/E746/E756), the
 940          * touchpad toggle hotkey (Fn+F4) is handled in software. Other models
 941          * have since added additional "soft keys". These are reported in the
 942          * status flags queried using FUNC_FLAGS.
 943          */
 944         if (priv->flags_supported & (FLAG_SOFTKEYS)) {
 945                 flags = call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0);
 946                 flags &= (FLAG_SOFTKEYS);
 947                 for_each_set_bit(i, &flags, BITS_PER_LONG)
 948                         sparse_keymap_report_event(priv->input, BIT(i), 1, true);
 949         }
 950 }
 951
 952 /* Initialization */
 953
 954 static const struct acpi_device_id fujitsu_bl_device_ids[] = {
 955         {ACPI_FUJITSU_BL_HID, 0},
 956         {"", 0},
 957 };
 958
 959 static struct acpi_driver acpi_fujitsu_bl_driver = {
 960         .name = ACPI_FUJITSU_BL_DRIVER_NAME,
 961         .class = ACPI_FUJITSU_CLASS,
 962         .ids = fujitsu_bl_device_ids,
 963         .ops = {
 964                 .add = acpi_fujitsu_bl_add,
 965                 .notify = acpi_fujitsu_bl_notify,
 966                 },
 967 };
 968
 969 static const struct acpi_device_id fujitsu_laptop_device_ids[] = {
 970         {ACPI_FUJITSU_LAPTOP_HID, 0},
 971         {"", 0},
 972 };
 973
 974 static struct acpi_driver acpi_fujitsu_laptop_driver = {
 975         .name = ACPI_FUJITSU_LAPTOP_DRIVER_NAME,
 976         .class = ACPI_FUJITSU_CLASS,
 977         .ids = fujitsu_laptop_device_ids,
 978         .ops = {
 979                 .add = acpi_fujitsu_laptop_add,
 980                 .remove = acpi_fujitsu_laptop_remove,
 981                 .notify = acpi_fujitsu_laptop_notify,
 982                 },
 983 };
 984
 985 static const struct acpi_device_id fujitsu_ids[] __used = {
 986         {ACPI_FUJITSU_BL_HID, 0},
 987         {ACPI_FUJITSU_LAPTOP_HID, 0},
 988         {"", 0}
 989 };
 990 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);
 991
 992 static int __init fujitsu_init(void)
 993 {
 994         int ret;
 995
 996         ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
 997         if (ret)
 998                 return ret;
 999
1000         /* Register platform stuff */
1001
1002         ret = platform_driver_register(&fujitsu_pf_driver);
1003         if (ret)
1004                 goto err_unregister_acpi;
1005
1006         /* Register laptop driver */
1007
1008         ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
1009         if (ret)
1010                 goto err_unregister_platform_driver;
1011
1012         pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
1013
1014         return 0;
1015
1016 err_unregister_platform_driver:
1017         platform_driver_unregister(&fujitsu_pf_driver);
1018 err_unregister_acpi:
1019         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1020
1021         return ret;
1022 }
1023
1024 static void __exit fujitsu_cleanup(void)
1025 {
1026         acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
1027
1028         platform_driver_unregister(&fujitsu_pf_driver);
1029
1030         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1031
1032         pr_info("driver unloaded\n");
1033 }
1034
1035 module_init(fujitsu_init);
1036 module_exit(fujitsu_cleanup);
1037
1038 module_param(use_alt_lcd_levels, int, 0644);
1039 MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
1040 module_param(disable_brightness_adjust, bool, 0644);
1041 MODULE_PARM_DESC(disable_brightness_adjust, "Disable LCD brightness adjustment");
1042
1043 MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
1044 MODULE_DESCRIPTION("Fujitsu laptop extras support");
1045 MODULE_VERSION(FUJITSU_DRIVER_VERSION);
1046 MODULE_LICENSE("GPL");