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 (b->props.power == FB_BLANK_POWERDOWN)
 258                 call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
 259         else
 260                 call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
 261
 262         return set_lcd_level(device, b->props.brightness);
 263 }
 264
 265 static const struct backlight_ops fujitsu_bl_ops = {
 266         .get_brightness = bl_get_brightness,
 267         .update_status = bl_update_status,
 268 };
 269
 270 static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
 271                         char *buf)
 272 {
 273         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 274
 275         if (!(priv->flags_supported & FLAG_LID))
 276                 return sprintf(buf, "unknown\n");
 277         if (priv->flags_state & FLAG_LID)
 278                 return sprintf(buf, "open\n");
 279         else
 280                 return sprintf(buf, "closed\n");
 281 }
 282
 283 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 284                          char *buf)
 285 {
 286         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 287
 288         if (!(priv->flags_supported & FLAG_DOCK))
 289                 return sprintf(buf, "unknown\n");
 290         if (priv->flags_state & FLAG_DOCK)
 291                 return sprintf(buf, "docked\n");
 292         else
 293                 return sprintf(buf, "undocked\n");
 294 }
 295
 296 static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
 297                            char *buf)
 298 {
 299         struct fujitsu_laptop *priv = dev_get_drvdata(dev);
 300
 301         if (!(priv->flags_supported & FLAG_RFKILL))
 302                 return sprintf(buf, "unknown\n");
 303         if (priv->flags_state & FLAG_RFKILL)
 304                 return sprintf(buf, "on\n");
 305         else
 306                 return sprintf(buf, "killed\n");
 307 }
 308
 309 static DEVICE_ATTR_RO(lid);
 310 static DEVICE_ATTR_RO(dock);
 311 static DEVICE_ATTR_RO(radios);
 312
 313 static struct attribute *fujitsu_pf_attributes[] = {
 314         &dev_attr_lid.attr,
 315         &dev_attr_dock.attr,
 316         &dev_attr_radios.attr,
 317         NULL
 318 };
 319
 320 static const struct attribute_group fujitsu_pf_attribute_group = {
 321         .attrs = fujitsu_pf_attributes
 322 };
 323
 324 static struct platform_driver fujitsu_pf_driver = {
 325         .driver = {
 326                    .name = "fujitsu-laptop",
 327                    }
 328 };
 329
 330 /* ACPI device for LCD brightness control */
 331
 332 static const struct key_entry keymap_backlight[] = {
 333         { KE_KEY, true, { KEY_BRIGHTNESSUP } },
 334         { KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
 335         { KE_END, 0 }
 336 };
 337
 338 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 339 {
 340         struct fujitsu_bl *priv = acpi_driver_data(device);
 341         int ret;
 342
 343         priv->input = devm_input_allocate_device(&device->dev);
 344         if (!priv->input)
 345                 return -ENOMEM;
 346
 347         snprintf(priv->phys, sizeof(priv->phys), "%s/video/input0",
 348                  acpi_device_hid(device));
 349
 350         priv->input->name = acpi_device_name(device);
 351         priv->input->phys = priv->phys;
 352         priv->input->id.bustype = BUS_HOST;
 353         priv->input->id.product = 0x06;
 354
 355         ret = sparse_keymap_setup(priv->input, keymap_backlight, NULL);
 356         if (ret)
 357                 return ret;
 358
 359         return input_register_device(priv->input);
 360 }
 361
 362 static int fujitsu_backlight_register(struct acpi_device *device)
 363 {
 364         struct fujitsu_bl *priv = acpi_driver_data(device);
 365         const struct backlight_properties props = {
 366                 .brightness = priv->brightness_level,
 367                 .max_brightness = priv->max_brightness - 1,
 368                 .type = BACKLIGHT_PLATFORM
 369         };
 370         struct backlight_device *bd;
 371
 372         bd = devm_backlight_device_register(&device->dev, "fujitsu-laptop",
 373                                             &device->dev, device,
 374                                             &fujitsu_bl_ops, &props);
 375         if (IS_ERR(bd))
 376                 return PTR_ERR(bd);
 377
 378         priv->bl_device = bd;
 379
 380         return 0;
 381 }
 382
 383 static int acpi_fujitsu_bl_add(struct acpi_device *device)
 384 {
 385         struct fujitsu_bl *priv;
 386         int error;
 387
 388         if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 389                 return -ENODEV;
 390
 391         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 392         if (!priv)
 393                 return -ENOMEM;
 394
 395         fujitsu_bl = priv;
 396         strcpy(acpi_device_name(device), ACPI_FUJITSU_BL_DEVICE_NAME);
 397         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 398         device->driver_data = priv;
 399
 400         error = acpi_fujitsu_bl_input_setup(device);
 401         if (error)
 402                 return error;
 403
 404         pr_info("ACPI: %s [%s]\n",
 405                 acpi_device_name(device), acpi_device_bid(device));
 406
 407         if (get_max_brightness(device) <= 0)
 408                 priv->max_brightness = FUJITSU_LCD_N_LEVELS;
 409         get_lcd_level(device);
 410
 411         error = fujitsu_backlight_register(device);
 412         if (error)
 413                 return error;
 414
 415         return 0;
 416 }
 417
 418 /* Brightness notify */
 419
 420 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 421 {
 422         struct fujitsu_bl *priv = acpi_driver_data(device);
 423         int oldb, newb;
 424
 425         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
 426                 acpi_handle_info(device->handle, "unsupported event [0x%x]\n",
 427                                  event);
 428                 sparse_keymap_report_event(priv->input, -1, 1, true);
 429                 return;
 430         }
 431
 432         oldb = priv->brightness_level;
 433         get_lcd_level(device);
 434         newb = priv->brightness_level;
 435
 436         acpi_handle_debug(device->handle,
 437                           "brightness button event [%i -> %i]\n", oldb, newb);
 438
 439         if (oldb == newb)
 440                 return;
 441
 442         if (!disable_brightness_adjust)
 443                 set_lcd_level(device, newb);
 444
 445         sparse_keymap_report_event(priv->input, oldb < newb, 1, true);
 446 }
 447
 448 /* ACPI device for hotkey handling */
 449
 450 static const struct key_entry keymap_default[] = {
 451         { KE_KEY, KEY1_CODE, { KEY_PROG1 } },
 452         { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
 453         { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
 454         { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
 455         { KE_KEY, KEY5_CODE, { KEY_RFKILL } },
 456         { KE_KEY, BIT(26),   { KEY_TOUCHPAD_TOGGLE } },
 457         { KE_END, 0 }
 458 };
 459
 460 static const struct key_entry keymap_s64x0[] = {
 461         { KE_KEY, KEY1_CODE, { KEY_SCREENLOCK } },      /* "Lock" */
 462         { KE_KEY, KEY2_CODE, { KEY_HELP } },            /* "Mobility Center */
 463         { KE_KEY, KEY3_CODE, { KEY_PROG3 } },
 464         { KE_KEY, KEY4_CODE, { KEY_PROG4 } },
 465         { KE_END, 0 }
 466 };
 467
 468 static const struct key_entry keymap_p8010[] = {
 469         { KE_KEY, KEY1_CODE, { KEY_HELP } },            /* "Support" */
 470         { KE_KEY, KEY2_CODE, { KEY_PROG2 } },
 471         { KE_KEY, KEY3_CODE, { KEY_SWITCHVIDEOMODE } }, /* "Presentation" */
 472         { KE_KEY, KEY4_CODE, { KEY_WWW } },             /* "WWW" */
 473         { KE_END, 0 }
 474 };
 475
 476 static const struct key_entry *keymap = keymap_default;
 477
 478 static int fujitsu_laptop_dmi_keymap_override(const struct dmi_system_id *id)
 479 {
 480         pr_info("Identified laptop model '%s'\n", id->ident);
 481         keymap = id->driver_data;
 482         return 1;
 483 }
 484
 485 static const struct dmi_system_id fujitsu_laptop_dmi_table[] = {
 486         {
 487                 .callback = fujitsu_laptop_dmi_keymap_override,
 488                 .ident = "Fujitsu Siemens S6410",
 489                 .matches = {
 490                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 491                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
 492                 },
 493                 .driver_data = (void *)keymap_s64x0
 494         },
 495         {
 496                 .callback = fujitsu_laptop_dmi_keymap_override,
 497                 .ident = "Fujitsu Siemens S6420",
 498                 .matches = {
 499                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 500                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
 501                 },
 502                 .driver_data = (void *)keymap_s64x0
 503         },
 504         {
 505                 .callback = fujitsu_laptop_dmi_keymap_override,
 506                 .ident = "Fujitsu LifeBook P8010",
 507                 .matches = {
 508                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 509                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
 510                 },
 511                 .driver_data = (void *)keymap_p8010
 512         },
 513         {}
 514 };
 515
 516 static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
 517 {
 518         struct fujitsu_laptop *priv = acpi_driver_data(device);
 519         int ret;
 520
 521         priv->input = devm_input_allocate_device(&device->dev);
 522         if (!priv->input)
 523                 return -ENOMEM;
 524
 525         snprintf(priv->phys, sizeof(priv->phys), "%s/input0",
 526                  acpi_device_hid(device));
 527
 528         priv->input->name = acpi_device_name(device);
 529         priv->input->phys = priv->phys;
 530         priv->input->id.bustype = BUS_HOST;
 531
 532         dmi_check_system(fujitsu_laptop_dmi_table);
 533         ret = sparse_keymap_setup(priv->input, keymap, NULL);
 534         if (ret)
 535                 return ret;
 536
 537         return input_register_device(priv->input);
 538 }
 539
 540 static int fujitsu_laptop_platform_add(struct acpi_device *device)
 541 {
 542         struct fujitsu_laptop *priv = acpi_driver_data(device);
 543         int ret;
 544
 545         priv->pf_device = platform_device_alloc("fujitsu-laptop", -1);
 546         if (!priv->pf_device)
 547                 return -ENOMEM;
 548
 549         platform_set_drvdata(priv->pf_device, priv);
 550
 551         ret = platform_device_add(priv->pf_device);
 552         if (ret)
 553                 goto err_put_platform_device;
 554
 555         ret = sysfs_create_group(&priv->pf_device->dev.kobj,
 556                                  &fujitsu_pf_attribute_group);
 557         if (ret)
 558                 goto err_del_platform_device;
 559
 560         return 0;
 561
 562 err_del_platform_device:
 563         platform_device_del(priv->pf_device);
 564 err_put_platform_device:
 565         platform_device_put(priv->pf_device);
 566
 567         return ret;
 568 }
 569
 570 static void fujitsu_laptop_platform_remove(struct acpi_device *device)
 571 {
 572         struct fujitsu_laptop *priv = acpi_driver_data(device);
 573
 574         sysfs_remove_group(&priv->pf_device->dev.kobj,
 575                            &fujitsu_pf_attribute_group);
 576         platform_device_unregister(priv->pf_device);
 577 }
 578
 579 static int logolamp_set(struct led_classdev *cdev,
 580                         enum led_brightness brightness)
 581 {
 582         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 583         int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
 584         int ret;
 585
 586         if (brightness < LED_HALF)
 587                 poweron = FUNC_LED_OFF;
 588
 589         if (brightness < LED_FULL)
 590                 always = FUNC_LED_OFF;
 591
 592         ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
 593         if (ret < 0)
 594                 return ret;
 595
 596         return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 597 }
 598
 599 static enum led_brightness logolamp_get(struct led_classdev *cdev)
 600 {
 601         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 602         int ret;
 603
 604         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
 605         if (ret == FUNC_LED_ON)
 606                 return LED_FULL;
 607
 608         ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
 609         if (ret == FUNC_LED_ON)
 610                 return LED_HALF;
 611
 612         return LED_OFF;
 613 }
 614
 615 static int kblamps_set(struct led_classdev *cdev,
 616                        enum led_brightness brightness)
 617 {
 618         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 619
 620         if (brightness >= LED_FULL)
 621                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 622                                       FUNC_LED_ON);
 623         else
 624                 return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 625                                       FUNC_LED_OFF);
 626 }
 627
 628 static enum led_brightness kblamps_get(struct led_classdev *cdev)
 629 {
 630         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 631         enum led_brightness brightness = LED_OFF;
 632
 633         if (call_fext_func(device,
 634                            FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
 635                 brightness = LED_FULL;
 636
 637         return brightness;
 638 }
 639
 640 static int radio_led_set(struct led_classdev *cdev,
 641                          enum led_brightness brightness)
 642 {
 643         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 644
 645         if (brightness >= LED_FULL)
 646                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 647                                       RADIO_LED_ON);
 648         else
 649                 return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 650                                       0x0);
 651 }
 652
 653 static enum led_brightness radio_led_get(struct led_classdev *cdev)
 654 {
 655         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 656         enum led_brightness brightness = LED_OFF;
 657
 658         if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
 659                 brightness = LED_FULL;
 660
 661         return brightness;
 662 }
 663
 664 static int eco_led_set(struct led_classdev *cdev,
 665                        enum led_brightness brightness)
 666 {
 667         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 668         int curr;
 669
 670         curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
 671         if (brightness >= LED_FULL)
 672                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 673                                       curr | ECO_LED_ON);
 674         else
 675                 return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 676                                       curr & ~ECO_LED_ON);
 677 }
 678
 679 static enum led_brightness eco_led_get(struct led_classdev *cdev)
 680 {
 681         struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 682         enum led_brightness brightness = LED_OFF;
 683
 684         if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
 685                 brightness = LED_FULL;
 686
 687         return brightness;
 688 }
 689
 690 static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 691 {
 692         struct led_classdev *led;
 693         int result;
 694
 695         if (call_fext_func(device,
 696                            FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
 697                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 698                 if (!led)
 699                         return -ENOMEM;
 700
 701                 led->name = "fujitsu::logolamp";
 702                 led->brightness_set_blocking = logolamp_set;
 703                 led->brightness_get = logolamp_get;
 704                 result = devm_led_classdev_register(&device->dev, led);
 705                 if (result)
 706                         return result;
 707         }
 708
 709         if ((call_fext_func(device,
 710                             FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
 711             (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
 712                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 713                 if (!led)
 714                         return -ENOMEM;
 715
 716                 led->name = "fujitsu::kblamps";
 717                 led->brightness_set_blocking = kblamps_set;
 718                 led->brightness_get = kblamps_get;
 719                 result = devm_led_classdev_register(&device->dev, led);
 720                 if (result)
 721                         return result;
 722         }
 723
 724         /*
 725          * BTNI bit 24 seems to indicate the presence of a radio toggle
 726          * button in place of a slide switch, and all such machines appear
 727          * to also have an RF LED.  Therefore use bit 24 as an indicator
 728          * that an RF LED is present.
 729          */
 730         if (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
 731                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 732                 if (!led)
 733                         return -ENOMEM;
 734
 735                 led->name = "fujitsu::radio_led";
 736                 led->brightness_set_blocking = radio_led_set;
 737                 led->brightness_get = radio_led_get;
 738                 led->default_trigger = "rfkill-any";
 739                 result = devm_led_classdev_register(&device->dev, led);
 740                 if (result)
 741                         return result;
 742         }
 743
 744         /* Support for eco led is not always signaled in bit corresponding
 745          * to the bit used to control the led. According to the DSDT table,
 746          * bit 14 seems to indicate presence of said led as well.
 747          * Confirm by testing the status.
 748          */
 749         if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
 750             (call_fext_func(device,
 751                             FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
 752                 led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
 753                 if (!led)
 754                         return -ENOMEM;
 755
 756                 led->name = "fujitsu::eco_led";
 757                 led->brightness_set_blocking = eco_led_set;
 758                 led->brightness_get = eco_led_get;
 759                 result = devm_led_classdev_register(&device->dev, led);
 760                 if (result)
 761                         return result;
 762         }
 763
 764         return 0;
 765 }
 766
 767 static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 768 {
 769         struct fujitsu_laptop *priv;
 770         int error;
 771         int i;
 772
 773         priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
 774         if (!priv)
 775                 return -ENOMEM;
 776
 777         WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found.  Driver may not work as intended.");
 778         fext = device;
 779
 780         strcpy(acpi_device_name(device), ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
 781         strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
 782         device->driver_data = priv;
 783
 784         /* kfifo */
 785         spin_lock_init(&priv->fifo_lock);
 786         error = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
 787                             GFP_KERNEL);
 788         if (error) {
 789                 pr_err("kfifo_alloc failed\n");
 790                 goto err_stop;
 791         }
 792
 793         error = acpi_fujitsu_laptop_input_setup(device);
 794         if (error)
 795                 goto err_free_fifo;
 796
 797         pr_info("ACPI: %s [%s]\n",
 798                 acpi_device_name(device), acpi_device_bid(device));
 799
 800         i = 0;
 801         while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
 802                 && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE)
 803                 ; /* No action, result is discarded */
 804         acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
 805                           i);
 806
 807         priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
 808                                                0x0);
 809
 810         /* Make sure our bitmask of supported functions is cleared if the
 811            RFKILL function block is not implemented, like on the S7020. */
 812         if (priv->flags_supported == UNSUPPORTED_CMD)
 813                 priv->flags_supported = 0;
 814
 815         if (priv->flags_supported)
 816                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 817                                                    0x0);
 818
 819         /* Suspect this is a keymap of the application panel, print it */
 820         acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
 821                          call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
 822
 823         /* Sync backlight power status */
 824         if (fujitsu_bl && fujitsu_bl->bl_device &&
 825             acpi_video_get_backlight_type() == acpi_backlight_vendor) {
 826                 if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
 827                         fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 828                 else
 829                         fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
 830         }
 831
 832         error = acpi_fujitsu_laptop_leds_register(device);
 833         if (error)
 834                 goto err_free_fifo;
 835
 836         error = fujitsu_laptop_platform_add(device);
 837         if (error)
 838                 goto err_free_fifo;
 839
 840         return 0;
 841
 842 err_free_fifo:
 843         kfifo_free(&priv->fifo);
 844 err_stop:
 845         return error;
 846 }
 847
 848 static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
 849 {
 850         struct fujitsu_laptop *priv = acpi_driver_data(device);
 851
 852         fujitsu_laptop_platform_remove(device);
 853
 854         kfifo_free(&priv->fifo);
 855
 856         return 0;
 857 }
 858
 859 static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
 860 {
 861         struct fujitsu_laptop *priv = acpi_driver_data(device);
 862         int status;
 863
 864         status = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
 865                                  sizeof(scancode), &priv->fifo_lock);
 866         if (status != sizeof(scancode)) {
 867                 dev_info(&priv->input->dev, "Could not push scancode [0x%x]\n",
 868                          scancode);
 869                 return;
 870         }
 871         sparse_keymap_report_event(priv->input, scancode, 1, false);
 872         dev_dbg(&priv->input->dev, "Push scancode into ringbuffer [0x%x]\n",
 873                 scancode);
 874 }
 875
 876 static void acpi_fujitsu_laptop_release(struct acpi_device *device)
 877 {
 878         struct fujitsu_laptop *priv = acpi_driver_data(device);
 879         int scancode, status;
 880
 881         while (true) {
 882                 status = kfifo_out_locked(&priv->fifo,
 883                                           (unsigned char *)&scancode,
 884                                           sizeof(scancode), &priv->fifo_lock);
 885                 if (status != sizeof(scancode))
 886                         return;
 887                 sparse_keymap_report_event(priv->input, scancode, 0, false);
 888                 dev_dbg(&priv->input->dev,
 889                         "Pop scancode from ringbuffer [0x%x]\n", scancode);
 890         }
 891 }
 892
 893 static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
 894 {
 895         struct fujitsu_laptop *priv = acpi_driver_data(device);
 896         int scancode, i = 0;
 897         unsigned int irb;
 898
 899         if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
 900                 acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
 901                                  event);
 902                 sparse_keymap_report_event(priv->input, -1, 1, true);
 903                 return;
 904         }
 905
 906         if (priv->flags_supported)
 907                 priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
 908                                                    0x0);
 909
 910         while ((irb = call_fext_func(device,
 911                                      FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
 912                i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
 913                 scancode = irb & 0x4ff;
 914                 if (sparse_keymap_entry_from_scancode(priv->input, scancode))
 915                         acpi_fujitsu_laptop_press(device, scancode);
 916                 else if (scancode == 0)
 917                         acpi_fujitsu_laptop_release(device);
 918                 else
 919                         acpi_handle_info(device->handle,
 920                                          "Unknown GIRB result [%x]\n", irb);
 921         }
 922
 923         /* On some models (first seen on the Skylake-based Lifebook
 924          * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
 925          * handled in software; its state is queried using FUNC_FLAGS
 926          */
 927         if ((priv->flags_supported & BIT(26)) &&
 928             (call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
 929                 sparse_keymap_report_event(priv->input, BIT(26), 1, true);
 930 }
 931
 932 /* Initialization */
 933
 934 static const struct acpi_device_id fujitsu_bl_device_ids[] = {
 935         {ACPI_FUJITSU_BL_HID, 0},
 936         {"", 0},
 937 };
 938
 939 static struct acpi_driver acpi_fujitsu_bl_driver = {
 940         .name = ACPI_FUJITSU_BL_DRIVER_NAME,
 941         .class = ACPI_FUJITSU_CLASS,
 942         .ids = fujitsu_bl_device_ids,
 943         .ops = {
 944                 .add = acpi_fujitsu_bl_add,
 945                 .notify = acpi_fujitsu_bl_notify,
 946                 },
 947 };
 948
 949 static const struct acpi_device_id fujitsu_laptop_device_ids[] = {
 950         {ACPI_FUJITSU_LAPTOP_HID, 0},
 951         {"", 0},
 952 };
 953
 954 static struct acpi_driver acpi_fujitsu_laptop_driver = {
 955         .name = ACPI_FUJITSU_LAPTOP_DRIVER_NAME,
 956         .class = ACPI_FUJITSU_CLASS,
 957         .ids = fujitsu_laptop_device_ids,
 958         .ops = {
 959                 .add = acpi_fujitsu_laptop_add,
 960                 .remove = acpi_fujitsu_laptop_remove,
 961                 .notify = acpi_fujitsu_laptop_notify,
 962                 },
 963 };
 964
 965 static const struct acpi_device_id fujitsu_ids[] __used = {
 966         {ACPI_FUJITSU_BL_HID, 0},
 967         {ACPI_FUJITSU_LAPTOP_HID, 0},
 968         {"", 0}
 969 };
 970 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);
 971
 972 static int __init fujitsu_init(void)
 973 {
 974         int ret;
 975
 976         ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
 977         if (ret)
 978                 return ret;
 979
 980         /* Register platform stuff */
 981
 982         ret = platform_driver_register(&fujitsu_pf_driver);
 983         if (ret)
 984                 goto err_unregister_acpi;
 985
 986         /* Register laptop driver */
 987
 988         ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
 989         if (ret)
 990                 goto err_unregister_platform_driver;
 991
 992         pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
 993
 994         return 0;
 995
 996 err_unregister_platform_driver:
 997         platform_driver_unregister(&fujitsu_pf_driver);
 998 err_unregister_acpi:
 999         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1000
1001         return ret;
1002 }
1003
1004 static void __exit fujitsu_cleanup(void)
1005 {
1006         acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
1007
1008         platform_driver_unregister(&fujitsu_pf_driver);
1009
1010         acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
1011
1012         pr_info("driver unloaded\n");
1013 }
1014
1015 module_init(fujitsu_init);
1016 module_exit(fujitsu_cleanup);
1017
1018 module_param(use_alt_lcd_levels, int, 0644);
1019 MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
1020 module_param(disable_brightness_adjust, bool, 0644);
1021 MODULE_PARM_DESC(disable_brightness_adjust, "Disable LCD brightness adjustment");
1022
1023 MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
1024 MODULE_DESCRIPTION("Fujitsu laptop extras support");
1025 MODULE_VERSION(FUJITSU_DRIVER_VERSION);
1026 MODULE_LICENSE("GPL");