drivers/platform/x86/classmate-laptop.c

   1 /*
   2  *  Copyright (C) 2009  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/workqueue.h>
  23 #include <acpi/acpi_drivers.h>
  24 #include <linux/backlight.h>
  25 #include <linux/input.h>
  26
  27 MODULE_LICENSE("GPL");
  28
  29
  30 struct cmpc_accel {
  31         int sensitivity;
  32 };
  33
  34 #define CMPC_ACCEL_SENSITIVITY_DEFAULT          5
  35
  36
  37 #define CMPC_ACCEL_HID          "ACCE0000"
  38 #define CMPC_TABLET_HID         "TBLT0000"
  39 #define CMPC_BL_HID             "IPML200"
  40 #define CMPC_KEYS_HID           "FnBT0000"
  41
  42 /*
  43  * Generic input device code.
  44  */
  45
  46 typedef void (*input_device_init)(struct input_dev *dev);
  47
  48 static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
  49                                        input_device_init idev_init)
  50 {
  51         struct input_dev *inputdev;
  52         int error;
  53
  54         inputdev = input_allocate_device();
  55         if (!inputdev)
  56                 return -ENOMEM;
  57         inputdev->name = name;
  58         inputdev->dev.parent = &acpi->dev;
  59         idev_init(inputdev);
  60         error = input_register_device(inputdev);
  61         if (error) {
  62                 input_free_device(inputdev);
  63                 return error;
  64         }
  65         dev_set_drvdata(&acpi->dev, inputdev);
  66         return 0;
  67 }
  68
  69 static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
  70 {
  71         struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
  72         input_unregister_device(inputdev);
  73         return 0;
  74 }
  75
  76 /*
  77  * Accelerometer code.
  78  */
  79 static acpi_status cmpc_start_accel(acpi_handle handle)
  80 {
  81         union acpi_object param[2];
  82         struct acpi_object_list input;
  83         acpi_status status;
  84
  85         param[0].type = ACPI_TYPE_INTEGER;
  86         param[0].integer.value = 0x3;
  87         param[1].type = ACPI_TYPE_INTEGER;
  88         input.count = 2;
  89         input.pointer = param;
  90         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
  91         return status;
  92 }
  93
  94 static acpi_status cmpc_stop_accel(acpi_handle handle)
  95 {
  96         union acpi_object param[2];
  97         struct acpi_object_list input;
  98         acpi_status status;
  99
 100         param[0].type = ACPI_TYPE_INTEGER;
 101         param[0].integer.value = 0x4;
 102         param[1].type = ACPI_TYPE_INTEGER;
 103         input.count = 2;
 104         input.pointer = param;
 105         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
 106         return status;
 107 }
 108
 109 static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val)
 110 {
 111         union acpi_object param[2];
 112         struct acpi_object_list input;
 113
 114         param[0].type = ACPI_TYPE_INTEGER;
 115         param[0].integer.value = 0x02;
 116         param[1].type = ACPI_TYPE_INTEGER;
 117         param[1].integer.value = val;
 118         input.count = 2;
 119         input.pointer = param;
 120         return acpi_evaluate_object(handle, "ACMD", &input, NULL);
 121 }
 122
 123 static acpi_status cmpc_get_accel(acpi_handle handle,
 124                                   unsigned char *x,
 125                                   unsigned char *y,
 126                                   unsigned char *z)
 127 {
 128         union acpi_object param[2];
 129         struct acpi_object_list input;
 130         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, 0 };
 131         unsigned char *locs;
 132         acpi_status status;
 133
 134         param[0].type = ACPI_TYPE_INTEGER;
 135         param[0].integer.value = 0x01;
 136         param[1].type = ACPI_TYPE_INTEGER;
 137         input.count = 2;
 138         input.pointer = param;
 139         status = acpi_evaluate_object(handle, "ACMD", &input, &output);
 140         if (ACPI_SUCCESS(status)) {
 141                 union acpi_object *obj;
 142                 obj = output.pointer;
 143                 locs = obj->buffer.pointer;
 144                 *x = locs[0];
 145                 *y = locs[1];
 146                 *z = locs[2];
 147                 kfree(output.pointer);
 148         }
 149         return status;
 150 }
 151
 152 static void cmpc_accel_handler(struct acpi_device *dev, u32 event)
 153 {
 154         if (event == 0x81) {
 155                 unsigned char x, y, z;
 156                 acpi_status status;
 157
 158                 status = cmpc_get_accel(dev->handle, &x, &y, &z);
 159                 if (ACPI_SUCCESS(status)) {
 160                         struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 161
 162                         input_report_abs(inputdev, ABS_X, x);
 163                         input_report_abs(inputdev, ABS_Y, y);
 164                         input_report_abs(inputdev, ABS_Z, z);
 165                         input_sync(inputdev);
 166                 }
 167         }
 168 }
 169
 170 static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
 171                                            struct device_attribute *attr,
 172                                            char *buf)
 173 {
 174         struct acpi_device *acpi;
 175         struct input_dev *inputdev;
 176         struct cmpc_accel *accel;
 177
 178         acpi = to_acpi_device(dev);
 179         inputdev = dev_get_drvdata(&acpi->dev);
 180         accel = dev_get_drvdata(&inputdev->dev);
 181
 182         return sprintf(buf, "%d\n", accel->sensitivity);
 183 }
 184
 185 static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
 186                                             struct device_attribute *attr,
 187                                             const char *buf, size_t count)
 188 {
 189         struct acpi_device *acpi;
 190         struct input_dev *inputdev;
 191         struct cmpc_accel *accel;
 192         unsigned long sensitivity;
 193         int r;
 194
 195         acpi = to_acpi_device(dev);
 196         inputdev = dev_get_drvdata(&acpi->dev);
 197         accel = dev_get_drvdata(&inputdev->dev);
 198
 199         r = strict_strtoul(buf, 0, &sensitivity);
 200         if (r)
 201                 return r;
 202
 203         accel->sensitivity = sensitivity;
 204         cmpc_accel_set_sensitivity(acpi->handle, sensitivity);
 205
 206         return strnlen(buf, count);
 207 }
 208
 209 struct device_attribute cmpc_accel_sensitivity_attr = {
 210         .attr = { .name = "sensitivity", .mode = 0660 },
 211         .show = cmpc_accel_sensitivity_show,
 212         .store = cmpc_accel_sensitivity_store
 213 };
 214
 215 static int cmpc_accel_open(struct input_dev *input)
 216 {
 217         struct acpi_device *acpi;
 218
 219         acpi = to_acpi_device(input->dev.parent);
 220         if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle)))
 221                 return 0;
 222         return -EIO;
 223 }
 224
 225 static void cmpc_accel_close(struct input_dev *input)
 226 {
 227         struct acpi_device *acpi;
 228
 229         acpi = to_acpi_device(input->dev.parent);
 230         cmpc_stop_accel(acpi->handle);
 231 }
 232
 233 static void cmpc_accel_idev_init(struct input_dev *inputdev)
 234 {
 235         set_bit(EV_ABS, inputdev->evbit);
 236         input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0);
 237         input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0);
 238         input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0);
 239         inputdev->open = cmpc_accel_open;
 240         inputdev->close = cmpc_accel_close;
 241 }
 242
 243 static int cmpc_accel_add(struct acpi_device *acpi)
 244 {
 245         int error;
 246         struct input_dev *inputdev;
 247         struct cmpc_accel *accel;
 248
 249         accel = kmalloc(sizeof(*accel), GFP_KERNEL);
 250         if (!accel)
 251                 return -ENOMEM;
 252
 253         accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
 254         cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity);
 255
 256         error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 257         if (error)
 258                 goto failed_file;
 259
 260         error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel",
 261                                             cmpc_accel_idev_init);
 262         if (error)
 263                 goto failed_input;
 264
 265         inputdev = dev_get_drvdata(&acpi->dev);
 266         dev_set_drvdata(&inputdev->dev, accel);
 267
 268         return 0;
 269
 270 failed_input:
 271         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 272 failed_file:
 273         kfree(accel);
 274         return error;
 275 }
 276
 277 static int cmpc_accel_remove(struct acpi_device *acpi, int type)
 278 {
 279         struct input_dev *inputdev;
 280         struct cmpc_accel *accel;
 281
 282         inputdev = dev_get_drvdata(&acpi->dev);
 283         accel = dev_get_drvdata(&inputdev->dev);
 284
 285         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 286         return cmpc_remove_acpi_notify_device(acpi);
 287 }
 288
 289 static const struct acpi_device_id cmpc_accel_device_ids[] = {
 290         {CMPC_ACCEL_HID, 0},
 291         {"", 0}
 292 };
 293
 294 static struct acpi_driver cmpc_accel_acpi_driver = {
 295         .owner = THIS_MODULE,
 296         .name = "cmpc_accel",
 297         .class = "cmpc_accel",
 298         .ids = cmpc_accel_device_ids,
 299         .ops = {
 300                 .add = cmpc_accel_add,
 301                 .remove = cmpc_accel_remove,
 302                 .notify = cmpc_accel_handler,
 303         }
 304 };
 305
 306
 307 /*
 308  * Tablet mode code.
 309  */
 310 static acpi_status cmpc_get_tablet(acpi_handle handle,
 311                                    unsigned long long *value)
 312 {
 313         union acpi_object param;
 314         struct acpi_object_list input;
 315         unsigned long long output;
 316         acpi_status status;
 317
 318         param.type = ACPI_TYPE_INTEGER;
 319         param.integer.value = 0x01;
 320         input.count = 1;
 321         input.pointer = &param;
 322         status = acpi_evaluate_integer(handle, "TCMD", &input, &output);
 323         if (ACPI_SUCCESS(status))
 324                 *value = output;
 325         return status;
 326 }
 327
 328 static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
 329 {
 330         unsigned long long val = 0;
 331         struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 332
 333         if (event == 0x81) {
 334                 if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val)))
 335                         input_report_switch(inputdev, SW_TABLET_MODE, !val);
 336         }
 337 }
 338
 339 static void cmpc_tablet_idev_init(struct input_dev *inputdev)
 340 {
 341         unsigned long long val = 0;
 342         struct acpi_device *acpi;
 343
 344         set_bit(EV_SW, inputdev->evbit);
 345         set_bit(SW_TABLET_MODE, inputdev->swbit);
 346
 347         acpi = to_acpi_device(inputdev->dev.parent);
 348         if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
 349                 input_report_switch(inputdev, SW_TABLET_MODE, !val);
 350 }
 351
 352 static int cmpc_tablet_add(struct acpi_device *acpi)
 353 {
 354         return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet",
 355                                            cmpc_tablet_idev_init);
 356 }
 357
 358 static int cmpc_tablet_remove(struct acpi_device *acpi, int type)
 359 {
 360         return cmpc_remove_acpi_notify_device(acpi);
 361 }
 362
 363 static int cmpc_tablet_resume(struct acpi_device *acpi)
 364 {
 365         struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
 366         unsigned long long val = 0;
 367         if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
 368                 input_report_switch(inputdev, SW_TABLET_MODE, !val);
 369         return 0;
 370 }
 371
 372 static const struct acpi_device_id cmpc_tablet_device_ids[] = {
 373         {CMPC_TABLET_HID, 0},
 374         {"", 0}
 375 };
 376
 377 static struct acpi_driver cmpc_tablet_acpi_driver = {
 378         .owner = THIS_MODULE,
 379         .name = "cmpc_tablet",
 380         .class = "cmpc_tablet",
 381         .ids = cmpc_tablet_device_ids,
 382         .ops = {
 383                 .add = cmpc_tablet_add,
 384                 .remove = cmpc_tablet_remove,
 385                 .resume = cmpc_tablet_resume,
 386                 .notify = cmpc_tablet_handler,
 387         }
 388 };
 389
 390
 391 /*
 392  * Backlight code.
 393  */
 394
 395 static acpi_status cmpc_get_brightness(acpi_handle handle,
 396                                        unsigned long long *value)
 397 {
 398         union acpi_object param;
 399         struct acpi_object_list input;
 400         unsigned long long output;
 401         acpi_status status;
 402
 403         param.type = ACPI_TYPE_INTEGER;
 404         param.integer.value = 0xC0;
 405         input.count = 1;
 406         input.pointer = &param;
 407         status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
 408         if (ACPI_SUCCESS(status))
 409                 *value = output;
 410         return status;
 411 }
 412
 413 static acpi_status cmpc_set_brightness(acpi_handle handle,
 414                                        unsigned long long value)
 415 {
 416         union acpi_object param[2];
 417         struct acpi_object_list input;
 418         acpi_status status;
 419         unsigned long long output;
 420
 421         param[0].type = ACPI_TYPE_INTEGER;
 422         param[0].integer.value = 0xC0;
 423         param[1].type = ACPI_TYPE_INTEGER;
 424         param[1].integer.value = value;
 425         input.count = 2;
 426         input.pointer = param;
 427         status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
 428         return status;
 429 }
 430
 431 static int cmpc_bl_get_brightness(struct backlight_device *bd)
 432 {
 433         acpi_status status;
 434         acpi_handle handle;
 435         unsigned long long brightness;
 436
 437         handle = bl_get_data(bd);
 438         status = cmpc_get_brightness(handle, &brightness);
 439         if (ACPI_SUCCESS(status))
 440                 return brightness;
 441         else
 442                 return -1;
 443 }
 444
 445 static int cmpc_bl_update_status(struct backlight_device *bd)
 446 {
 447         acpi_status status;
 448         acpi_handle handle;
 449
 450         handle = bl_get_data(bd);
 451         status = cmpc_set_brightness(handle, bd->props.brightness);
 452         if (ACPI_SUCCESS(status))
 453                 return 0;
 454         else
 455                 return -1;
 456 }
 457
 458 static const struct backlight_ops cmpc_bl_ops = {
 459         .get_brightness = cmpc_bl_get_brightness,
 460         .update_status = cmpc_bl_update_status
 461 };
 462
 463 static int cmpc_bl_add(struct acpi_device *acpi)
 464 {
 465         struct backlight_properties props;
 466         struct backlight_device *bd;
 467
 468         memset(&props, 0, sizeof(struct backlight_properties));
 469         props.max_brightness = 7;
 470         bd = backlight_device_register("cmpc_bl", &acpi->dev, acpi->handle,
 471                                        &cmpc_bl_ops, &props);
 472         if (IS_ERR(bd))
 473                 return PTR_ERR(bd);
 474         dev_set_drvdata(&acpi->dev, bd);
 475         return 0;
 476 }
 477
 478 static int cmpc_bl_remove(struct acpi_device *acpi, int type)
 479 {
 480         struct backlight_device *bd;
 481
 482         bd = dev_get_drvdata(&acpi->dev);
 483         backlight_device_unregister(bd);
 484         return 0;
 485 }
 486
 487 static const struct acpi_device_id cmpc_bl_device_ids[] = {
 488         {CMPC_BL_HID, 0},
 489         {"", 0}
 490 };
 491
 492 static struct acpi_driver cmpc_bl_acpi_driver = {
 493         .owner = THIS_MODULE,
 494         .name = "cmpc",
 495         .class = "cmpc",
 496         .ids = cmpc_bl_device_ids,
 497         .ops = {
 498                 .add = cmpc_bl_add,
 499                 .remove = cmpc_bl_remove
 500         }
 501 };
 502
 503
 504 /*
 505  * Extra keys code.
 506  */
 507 static int cmpc_keys_codes[] = {
 508         KEY_UNKNOWN,
 509         KEY_WLAN,
 510         KEY_SWITCHVIDEOMODE,
 511         KEY_BRIGHTNESSDOWN,
 512         KEY_BRIGHTNESSUP,
 513         KEY_VENDOR,
 514         KEY_UNKNOWN,
 515         KEY_CAMERA,
 516         KEY_BACK,
 517         KEY_FORWARD,
 518         KEY_MAX
 519 };
 520
 521 static void cmpc_keys_handler(struct acpi_device *dev, u32 event)
 522 {
 523         struct input_dev *inputdev;
 524         int code = KEY_MAX;
 525
 526         if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes))
 527                 code = cmpc_keys_codes[event & 0x0F];
 528         inputdev = dev_get_drvdata(&dev->dev);;
 529         input_report_key(inputdev, code, !(event & 0x10));
 530 }
 531
 532 static void cmpc_keys_idev_init(struct input_dev *inputdev)
 533 {
 534         int i;
 535
 536         set_bit(EV_KEY, inputdev->evbit);
 537         for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++)
 538                 set_bit(cmpc_keys_codes[i], inputdev->keybit);
 539 }
 540
 541 static int cmpc_keys_add(struct acpi_device *acpi)
 542 {
 543         return cmpc_add_acpi_notify_device(acpi, "cmpc_keys",
 544                                            cmpc_keys_idev_init);
 545 }
 546
 547 static int cmpc_keys_remove(struct acpi_device *acpi, int type)
 548 {
 549         return cmpc_remove_acpi_notify_device(acpi);
 550 }
 551
 552 static const struct acpi_device_id cmpc_keys_device_ids[] = {
 553         {CMPC_KEYS_HID, 0},
 554         {"", 0}
 555 };
 556
 557 static struct acpi_driver cmpc_keys_acpi_driver = {
 558         .owner = THIS_MODULE,
 559         .name = "cmpc_keys",
 560         .class = "cmpc_keys",
 561         .ids = cmpc_keys_device_ids,
 562         .ops = {
 563                 .add = cmpc_keys_add,
 564                 .remove = cmpc_keys_remove,
 565                 .notify = cmpc_keys_handler,
 566         }
 567 };
 568
 569
 570 /*
 571  * General init/exit code.
 572  */
 573
 574 static int cmpc_init(void)
 575 {
 576         int r;
 577
 578         r = acpi_bus_register_driver(&cmpc_keys_acpi_driver);
 579         if (r)
 580                 goto failed_keys;
 581
 582         r = acpi_bus_register_driver(&cmpc_bl_acpi_driver);
 583         if (r)
 584                 goto failed_bl;
 585
 586         r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver);
 587         if (r)
 588                 goto failed_tablet;
 589
 590         r = acpi_bus_register_driver(&cmpc_accel_acpi_driver);
 591         if (r)
 592                 goto failed_accel;
 593
 594         return r;
 595
 596 failed_accel:
 597         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
 598
 599 failed_tablet:
 600         acpi_bus_unregister_driver(&cmpc_bl_acpi_driver);
 601
 602 failed_bl:
 603         acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
 604
 605 failed_keys:
 606         return r;
 607 }
 608
 609 static void cmpc_exit(void)
 610 {
 611         acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
 612         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
 613         acpi_bus_unregister_driver(&cmpc_bl_acpi_driver);
 614         acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
 615 }
 616
 617 module_init(cmpc_init);
 618 module_exit(cmpc_exit);
 619
 620 static const struct acpi_device_id cmpc_device_ids[] = {
 621         {CMPC_ACCEL_HID, 0},
 622         {CMPC_TABLET_HID, 0},
 623         {CMPC_BL_HID, 0},
 624         {CMPC_KEYS_HID, 0},
 625         {"", 0}
 626 };
 627
 628 MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);