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