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/slab.h>
  23 #include <linux/workqueue.h>
  24 #include <acpi/acpi_drivers.h>
  25 #include <linux/backlight.h>
  26 #include <linux/input.h>
  27 #include <linux/rfkill.h>
  28
  29 MODULE_LICENSE("GPL");
  30
  31
  32 struct cmpc_accel {
  33         int sensitivity;
  34         int g_select;
  35         int inputdev_state;
  36 };
  37
  38 #define CMPC_ACCEL_DEV_STATE_CLOSED     0
  39 #define CMPC_ACCEL_DEV_STATE_OPEN       1
  40
  41 #define CMPC_ACCEL_SENSITIVITY_DEFAULT          5
  42 #define CMPC_ACCEL_G_SELECT_DEFAULT             0
  43
  44 #define CMPC_ACCEL_HID          "ACCE0000"
  45 #define CMPC_ACCEL_HID_V4       "ACCE0001"
  46 #define CMPC_TABLET_HID         "TBLT0000"
  47 #define CMPC_IPML_HID   "IPML200"
  48 #define CMPC_KEYS_HID           "FNBT0000"
  49
  50 /*
  51  * Generic input device code.
  52  */
  53
  54 typedef void (*input_device_init)(struct input_dev *dev);
  55
  56 static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
  57                                        input_device_init idev_init)
  58 {
  59         struct input_dev *inputdev;
  60         int error;
  61
  62         inputdev = input_allocate_device();
  63         if (!inputdev)
  64                 return -ENOMEM;
  65         inputdev->name = name;
  66         inputdev->dev.parent = &acpi->dev;
  67         idev_init(inputdev);
  68         error = input_register_device(inputdev);
  69         if (error) {
  70                 input_free_device(inputdev);
  71                 return error;
  72         }
  73         dev_set_drvdata(&acpi->dev, inputdev);
  74         return 0;
  75 }
  76
  77 static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
  78 {
  79         struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
  80         input_unregister_device(inputdev);
  81         return 0;
  82 }
  83
  84 /*
  85  * Accelerometer code for Classmate V4
  86  */
  87 static acpi_status cmpc_start_accel_v4(acpi_handle handle)
  88 {
  89         union acpi_object param[4];
  90         struct acpi_object_list input;
  91         acpi_status status;
  92
  93         param[0].type = ACPI_TYPE_INTEGER;
  94         param[0].integer.value = 0x3;
  95         param[1].type = ACPI_TYPE_INTEGER;
  96         param[1].integer.value = 0;
  97         param[2].type = ACPI_TYPE_INTEGER;
  98         param[2].integer.value = 0;
  99         param[3].type = ACPI_TYPE_INTEGER;
 100         param[3].integer.value = 0;
 101         input.count = 4;
 102         input.pointer = param;
 103         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
 104         return status;
 105 }
 106
 107 static acpi_status cmpc_stop_accel_v4(acpi_handle handle)
 108 {
 109         union acpi_object param[4];
 110         struct acpi_object_list input;
 111         acpi_status status;
 112
 113         param[0].type = ACPI_TYPE_INTEGER;
 114         param[0].integer.value = 0x4;
 115         param[1].type = ACPI_TYPE_INTEGER;
 116         param[1].integer.value = 0;
 117         param[2].type = ACPI_TYPE_INTEGER;
 118         param[2].integer.value = 0;
 119         param[3].type = ACPI_TYPE_INTEGER;
 120         param[3].integer.value = 0;
 121         input.count = 4;
 122         input.pointer = param;
 123         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
 124         return status;
 125 }
 126
 127 static acpi_status cmpc_accel_set_sensitivity_v4(acpi_handle handle, int val)
 128 {
 129         union acpi_object param[4];
 130         struct acpi_object_list input;
 131
 132         param[0].type = ACPI_TYPE_INTEGER;
 133         param[0].integer.value = 0x02;
 134         param[1].type = ACPI_TYPE_INTEGER;
 135         param[1].integer.value = val;
 136         param[2].type = ACPI_TYPE_INTEGER;
 137         param[2].integer.value = 0;
 138         param[3].type = ACPI_TYPE_INTEGER;
 139         param[3].integer.value = 0;
 140         input.count = 4;
 141         input.pointer = param;
 142         return acpi_evaluate_object(handle, "ACMD", &input, NULL);
 143 }
 144
 145 static acpi_status cmpc_accel_set_g_select_v4(acpi_handle handle, int val)
 146 {
 147         union acpi_object param[4];
 148         struct acpi_object_list input;
 149
 150         param[0].type = ACPI_TYPE_INTEGER;
 151         param[0].integer.value = 0x05;
 152         param[1].type = ACPI_TYPE_INTEGER;
 153         param[1].integer.value = val;
 154         param[2].type = ACPI_TYPE_INTEGER;
 155         param[2].integer.value = 0;
 156         param[3].type = ACPI_TYPE_INTEGER;
 157         param[3].integer.value = 0;
 158         input.count = 4;
 159         input.pointer = param;
 160         return acpi_evaluate_object(handle, "ACMD", &input, NULL);
 161 }
 162
 163 static acpi_status cmpc_get_accel_v4(acpi_handle handle,
 164                                      int16_t *x,
 165                                      int16_t *y,
 166                                      int16_t *z)
 167 {
 168         union acpi_object param[4];
 169         struct acpi_object_list input;
 170         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 171         int16_t *locs;
 172         acpi_status status;
 173
 174         param[0].type = ACPI_TYPE_INTEGER;
 175         param[0].integer.value = 0x01;
 176         param[1].type = ACPI_TYPE_INTEGER;
 177         param[1].integer.value = 0;
 178         param[2].type = ACPI_TYPE_INTEGER;
 179         param[2].integer.value = 0;
 180         param[3].type = ACPI_TYPE_INTEGER;
 181         param[3].integer.value = 0;
 182         input.count = 4;
 183         input.pointer = param;
 184         status = acpi_evaluate_object(handle, "ACMD", &input, &output);
 185         if (ACPI_SUCCESS(status)) {
 186                 union acpi_object *obj;
 187                 obj = output.pointer;
 188                 locs = (int16_t *) obj->buffer.pointer;
 189                 *x = locs[0];
 190                 *y = locs[1];
 191                 *z = locs[2];
 192                 kfree(output.pointer);
 193         }
 194         return status;
 195 }
 196
 197 static void cmpc_accel_handler_v4(struct acpi_device *dev, u32 event)
 198 {
 199         if (event == 0x81) {
 200                 int16_t x, y, z;
 201                 acpi_status status;
 202
 203                 status = cmpc_get_accel_v4(dev->handle, &x, &y, &z);
 204                 if (ACPI_SUCCESS(status)) {
 205                         struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 206
 207                         input_report_abs(inputdev, ABS_X, x);
 208                         input_report_abs(inputdev, ABS_Y, y);
 209                         input_report_abs(inputdev, ABS_Z, z);
 210                         input_sync(inputdev);
 211                 }
 212         }
 213 }
 214
 215 static ssize_t cmpc_accel_sensitivity_show_v4(struct device *dev,
 216                                               struct device_attribute *attr,
 217                                               char *buf)
 218 {
 219         struct acpi_device *acpi;
 220         struct input_dev *inputdev;
 221         struct cmpc_accel *accel;
 222
 223         acpi = to_acpi_device(dev);
 224         inputdev = dev_get_drvdata(&acpi->dev);
 225         accel = dev_get_drvdata(&inputdev->dev);
 226
 227         return sprintf(buf, "%d\n", accel->sensitivity);
 228 }
 229
 230 static ssize_t cmpc_accel_sensitivity_store_v4(struct device *dev,
 231                                                struct device_attribute *attr,
 232                                                const char *buf, size_t count)
 233 {
 234         struct acpi_device *acpi;
 235         struct input_dev *inputdev;
 236         struct cmpc_accel *accel;
 237         unsigned long sensitivity;
 238         int r;
 239
 240         acpi = to_acpi_device(dev);
 241         inputdev = dev_get_drvdata(&acpi->dev);
 242         accel = dev_get_drvdata(&inputdev->dev);
 243
 244         r = kstrtoul(buf, 0, &sensitivity);
 245         if (r)
 246                 return r;
 247
 248         /* sensitivity must be between 1 and 127 */
 249         if (sensitivity < 1 || sensitivity > 127)
 250                 return -EINVAL;
 251
 252         accel->sensitivity = sensitivity;
 253         cmpc_accel_set_sensitivity_v4(acpi->handle, sensitivity);
 254
 255         return strnlen(buf, count);
 256 }
 257
 258 static struct device_attribute cmpc_accel_sensitivity_attr_v4 = {
 259         .attr = { .name = "sensitivity", .mode = 0660 },
 260         .show = cmpc_accel_sensitivity_show_v4,
 261         .store = cmpc_accel_sensitivity_store_v4
 262 };
 263
 264 static ssize_t cmpc_accel_g_select_show_v4(struct device *dev,
 265                                            struct device_attribute *attr,
 266                                            char *buf)
 267 {
 268         struct acpi_device *acpi;
 269         struct input_dev *inputdev;
 270         struct cmpc_accel *accel;
 271
 272         acpi = to_acpi_device(dev);
 273         inputdev = dev_get_drvdata(&acpi->dev);
 274         accel = dev_get_drvdata(&inputdev->dev);
 275
 276         return sprintf(buf, "%d\n", accel->g_select);
 277 }
 278
 279 static ssize_t cmpc_accel_g_select_store_v4(struct device *dev,
 280                                             struct device_attribute *attr,
 281                                             const char *buf, size_t count)
 282 {
 283         struct acpi_device *acpi;
 284         struct input_dev *inputdev;
 285         struct cmpc_accel *accel;
 286         unsigned long g_select;
 287         int r;
 288
 289         acpi = to_acpi_device(dev);
 290         inputdev = dev_get_drvdata(&acpi->dev);
 291         accel = dev_get_drvdata(&inputdev->dev);
 292
 293         r = kstrtoul(buf, 0, &g_select);
 294         if (r)
 295                 return r;
 296
 297         /* 0 means 1.5g, 1 means 6g, everything else is wrong */
 298         if (g_select != 0 && g_select != 1)
 299                 return -EINVAL;
 300
 301         accel->g_select = g_select;
 302         cmpc_accel_set_g_select_v4(acpi->handle, g_select);
 303
 304         return strnlen(buf, count);
 305 }
 306
 307 static struct device_attribute cmpc_accel_g_select_attr_v4 = {
 308         .attr = { .name = "g_select", .mode = 0660 },
 309         .show = cmpc_accel_g_select_show_v4,
 310         .store = cmpc_accel_g_select_store_v4
 311 };
 312
 313 static int cmpc_accel_open_v4(struct input_dev *input)
 314 {
 315         struct acpi_device *acpi;
 316         struct cmpc_accel *accel;
 317
 318         acpi = to_acpi_device(input->dev.parent);
 319         accel = dev_get_drvdata(&input->dev);
 320
 321         cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
 322         cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
 323
 324         if (ACPI_SUCCESS(cmpc_start_accel_v4(acpi->handle))) {
 325                 accel->inputdev_state = CMPC_ACCEL_DEV_STATE_OPEN;
 326                 return 0;
 327         }
 328         return -EIO;
 329 }
 330
 331 static void cmpc_accel_close_v4(struct input_dev *input)
 332 {
 333         struct acpi_device *acpi;
 334         struct cmpc_accel *accel;
 335
 336         acpi = to_acpi_device(input->dev.parent);
 337         accel = dev_get_drvdata(&input->dev);
 338
 339         cmpc_stop_accel_v4(acpi->handle);
 340         accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
 341 }
 342
 343 static void cmpc_accel_idev_init_v4(struct input_dev *inputdev)
 344 {
 345         set_bit(EV_ABS, inputdev->evbit);
 346         input_set_abs_params(inputdev, ABS_X, -255, 255, 16, 0);
 347         input_set_abs_params(inputdev, ABS_Y, -255, 255, 16, 0);
 348         input_set_abs_params(inputdev, ABS_Z, -255, 255, 16, 0);
 349         inputdev->open = cmpc_accel_open_v4;
 350         inputdev->close = cmpc_accel_close_v4;
 351 }
 352
 353 #ifdef CONFIG_PM_SLEEP
 354 static int cmpc_accel_suspend_v4(struct device *dev)
 355 {
 356         struct input_dev *inputdev;
 357         struct cmpc_accel *accel;
 358
 359         inputdev = dev_get_drvdata(dev);
 360         accel = dev_get_drvdata(&inputdev->dev);
 361
 362         if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN)
 363                 return cmpc_stop_accel_v4(to_acpi_device(dev)->handle);
 364
 365         return 0;
 366 }
 367
 368 static int cmpc_accel_resume_v4(struct device *dev)
 369 {
 370         struct input_dev *inputdev;
 371         struct cmpc_accel *accel;
 372
 373         inputdev = dev_get_drvdata(dev);
 374         accel = dev_get_drvdata(&inputdev->dev);
 375
 376         if (accel->inputdev_state == CMPC_ACCEL_DEV_STATE_OPEN) {
 377                 cmpc_accel_set_sensitivity_v4(to_acpi_device(dev)->handle,
 378                                               accel->sensitivity);
 379                 cmpc_accel_set_g_select_v4(to_acpi_device(dev)->handle,
 380                                            accel->g_select);
 381
 382                 if (ACPI_FAILURE(cmpc_start_accel_v4(to_acpi_device(dev)->handle)))
 383                         return -EIO;
 384         }
 385
 386         return 0;
 387 }
 388 #endif
 389
 390 static int cmpc_accel_add_v4(struct acpi_device *acpi)
 391 {
 392         int error;
 393         struct input_dev *inputdev;
 394         struct cmpc_accel *accel;
 395
 396         accel = kmalloc(sizeof(*accel), GFP_KERNEL);
 397         if (!accel)
 398                 return -ENOMEM;
 399
 400         accel->inputdev_state = CMPC_ACCEL_DEV_STATE_CLOSED;
 401
 402         accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
 403         cmpc_accel_set_sensitivity_v4(acpi->handle, accel->sensitivity);
 404
 405         error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
 406         if (error)
 407                 goto failed_sensitivity;
 408
 409         accel->g_select = CMPC_ACCEL_G_SELECT_DEFAULT;
 410         cmpc_accel_set_g_select_v4(acpi->handle, accel->g_select);
 411
 412         error = device_create_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
 413         if (error)
 414                 goto failed_g_select;
 415
 416         error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel_v4",
 417                                             cmpc_accel_idev_init_v4);
 418         if (error)
 419                 goto failed_input;
 420
 421         inputdev = dev_get_drvdata(&acpi->dev);
 422         dev_set_drvdata(&inputdev->dev, accel);
 423
 424         return 0;
 425
 426 failed_input:
 427         device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
 428 failed_g_select:
 429         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
 430 failed_sensitivity:
 431         kfree(accel);
 432         return error;
 433 }
 434
 435 static int cmpc_accel_remove_v4(struct acpi_device *acpi, int type)
 436 {
 437         struct input_dev *inputdev;
 438         struct cmpc_accel *accel;
 439
 440         inputdev = dev_get_drvdata(&acpi->dev);
 441         accel = dev_get_drvdata(&inputdev->dev);
 442
 443         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr_v4);
 444         device_remove_file(&acpi->dev, &cmpc_accel_g_select_attr_v4);
 445         return cmpc_remove_acpi_notify_device(acpi);
 446 }
 447
 448 static SIMPLE_DEV_PM_OPS(cmpc_accel_pm, cmpc_accel_suspend_v4,
 449                          cmpc_accel_resume_v4);
 450
 451 static const struct acpi_device_id cmpc_accel_device_ids_v4[] = {
 452         {CMPC_ACCEL_HID_V4, 0},
 453         {"", 0}
 454 };
 455
 456 static struct acpi_driver cmpc_accel_acpi_driver_v4 = {
 457         .owner = THIS_MODULE,
 458         .name = "cmpc_accel_v4",
 459         .class = "cmpc_accel_v4",
 460         .ids = cmpc_accel_device_ids_v4,
 461         .ops = {
 462                 .add = cmpc_accel_add_v4,
 463                 .remove = cmpc_accel_remove_v4,
 464                 .notify = cmpc_accel_handler_v4,
 465         },
 466         .drv.pm = &cmpc_accel_pm,
 467 };
 468
 469
 470 /*
 471  * Accelerometer code for Classmate versions prior to V4
 472  */
 473 static acpi_status cmpc_start_accel(acpi_handle handle)
 474 {
 475         union acpi_object param[2];
 476         struct acpi_object_list input;
 477         acpi_status status;
 478
 479         param[0].type = ACPI_TYPE_INTEGER;
 480         param[0].integer.value = 0x3;
 481         param[1].type = ACPI_TYPE_INTEGER;
 482         input.count = 2;
 483         input.pointer = param;
 484         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
 485         return status;
 486 }
 487
 488 static acpi_status cmpc_stop_accel(acpi_handle handle)
 489 {
 490         union acpi_object param[2];
 491         struct acpi_object_list input;
 492         acpi_status status;
 493
 494         param[0].type = ACPI_TYPE_INTEGER;
 495         param[0].integer.value = 0x4;
 496         param[1].type = ACPI_TYPE_INTEGER;
 497         input.count = 2;
 498         input.pointer = param;
 499         status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
 500         return status;
 501 }
 502
 503 static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val)
 504 {
 505         union acpi_object param[2];
 506         struct acpi_object_list input;
 507
 508         param[0].type = ACPI_TYPE_INTEGER;
 509         param[0].integer.value = 0x02;
 510         param[1].type = ACPI_TYPE_INTEGER;
 511         param[1].integer.value = val;
 512         input.count = 2;
 513         input.pointer = param;
 514         return acpi_evaluate_object(handle, "ACMD", &input, NULL);
 515 }
 516
 517 static acpi_status cmpc_get_accel(acpi_handle handle,
 518                                   unsigned char *x,
 519                                   unsigned char *y,
 520                                   unsigned char *z)
 521 {
 522         union acpi_object param[2];
 523         struct acpi_object_list input;
 524         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, 0 };
 525         unsigned char *locs;
 526         acpi_status status;
 527
 528         param[0].type = ACPI_TYPE_INTEGER;
 529         param[0].integer.value = 0x01;
 530         param[1].type = ACPI_TYPE_INTEGER;
 531         input.count = 2;
 532         input.pointer = param;
 533         status = acpi_evaluate_object(handle, "ACMD", &input, &output);
 534         if (ACPI_SUCCESS(status)) {
 535                 union acpi_object *obj;
 536                 obj = output.pointer;
 537                 locs = obj->buffer.pointer;
 538                 *x = locs[0];
 539                 *y = locs[1];
 540                 *z = locs[2];
 541                 kfree(output.pointer);
 542         }
 543         return status;
 544 }
 545
 546 static void cmpc_accel_handler(struct acpi_device *dev, u32 event)
 547 {
 548         if (event == 0x81) {
 549                 unsigned char x, y, z;
 550                 acpi_status status;
 551
 552                 status = cmpc_get_accel(dev->handle, &x, &y, &z);
 553                 if (ACPI_SUCCESS(status)) {
 554                         struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 555
 556                         input_report_abs(inputdev, ABS_X, x);
 557                         input_report_abs(inputdev, ABS_Y, y);
 558                         input_report_abs(inputdev, ABS_Z, z);
 559                         input_sync(inputdev);
 560                 }
 561         }
 562 }
 563
 564 static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
 565                                            struct device_attribute *attr,
 566                                            char *buf)
 567 {
 568         struct acpi_device *acpi;
 569         struct input_dev *inputdev;
 570         struct cmpc_accel *accel;
 571
 572         acpi = to_acpi_device(dev);
 573         inputdev = dev_get_drvdata(&acpi->dev);
 574         accel = dev_get_drvdata(&inputdev->dev);
 575
 576         return sprintf(buf, "%d\n", accel->sensitivity);
 577 }
 578
 579 static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
 580                                             struct device_attribute *attr,
 581                                             const char *buf, size_t count)
 582 {
 583         struct acpi_device *acpi;
 584         struct input_dev *inputdev;
 585         struct cmpc_accel *accel;
 586         unsigned long sensitivity;
 587         int r;
 588
 589         acpi = to_acpi_device(dev);
 590         inputdev = dev_get_drvdata(&acpi->dev);
 591         accel = dev_get_drvdata(&inputdev->dev);
 592
 593         r = strict_strtoul(buf, 0, &sensitivity);
 594         if (r)
 595                 return r;
 596
 597         accel->sensitivity = sensitivity;
 598         cmpc_accel_set_sensitivity(acpi->handle, sensitivity);
 599
 600         return strnlen(buf, count);
 601 }
 602
 603 static struct device_attribute cmpc_accel_sensitivity_attr = {
 604         .attr = { .name = "sensitivity", .mode = 0660 },
 605         .show = cmpc_accel_sensitivity_show,
 606         .store = cmpc_accel_sensitivity_store
 607 };
 608
 609 static int cmpc_accel_open(struct input_dev *input)
 610 {
 611         struct acpi_device *acpi;
 612
 613         acpi = to_acpi_device(input->dev.parent);
 614         if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle)))
 615                 return 0;
 616         return -EIO;
 617 }
 618
 619 static void cmpc_accel_close(struct input_dev *input)
 620 {
 621         struct acpi_device *acpi;
 622
 623         acpi = to_acpi_device(input->dev.parent);
 624         cmpc_stop_accel(acpi->handle);
 625 }
 626
 627 static void cmpc_accel_idev_init(struct input_dev *inputdev)
 628 {
 629         set_bit(EV_ABS, inputdev->evbit);
 630         input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0);
 631         input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0);
 632         input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0);
 633         inputdev->open = cmpc_accel_open;
 634         inputdev->close = cmpc_accel_close;
 635 }
 636
 637 static int cmpc_accel_add(struct acpi_device *acpi)
 638 {
 639         int error;
 640         struct input_dev *inputdev;
 641         struct cmpc_accel *accel;
 642
 643         accel = kmalloc(sizeof(*accel), GFP_KERNEL);
 644         if (!accel)
 645                 return -ENOMEM;
 646
 647         accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
 648         cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity);
 649
 650         error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 651         if (error)
 652                 goto failed_file;
 653
 654         error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel",
 655                                             cmpc_accel_idev_init);
 656         if (error)
 657                 goto failed_input;
 658
 659         inputdev = dev_get_drvdata(&acpi->dev);
 660         dev_set_drvdata(&inputdev->dev, accel);
 661
 662         return 0;
 663
 664 failed_input:
 665         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 666 failed_file:
 667         kfree(accel);
 668         return error;
 669 }
 670
 671 static int cmpc_accel_remove(struct acpi_device *acpi, int type)
 672 {
 673         struct input_dev *inputdev;
 674         struct cmpc_accel *accel;
 675
 676         inputdev = dev_get_drvdata(&acpi->dev);
 677         accel = dev_get_drvdata(&inputdev->dev);
 678
 679         device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
 680         return cmpc_remove_acpi_notify_device(acpi);
 681 }
 682
 683 static const struct acpi_device_id cmpc_accel_device_ids[] = {
 684         {CMPC_ACCEL_HID, 0},
 685         {"", 0}
 686 };
 687
 688 static struct acpi_driver cmpc_accel_acpi_driver = {
 689         .owner = THIS_MODULE,
 690         .name = "cmpc_accel",
 691         .class = "cmpc_accel",
 692         .ids = cmpc_accel_device_ids,
 693         .ops = {
 694                 .add = cmpc_accel_add,
 695                 .remove = cmpc_accel_remove,
 696                 .notify = cmpc_accel_handler,
 697         }
 698 };
 699
 700
 701 /*
 702  * Tablet mode code.
 703  */
 704 static acpi_status cmpc_get_tablet(acpi_handle handle,
 705                                    unsigned long long *value)
 706 {
 707         union acpi_object param;
 708         struct acpi_object_list input;
 709         unsigned long long output;
 710         acpi_status status;
 711
 712         param.type = ACPI_TYPE_INTEGER;
 713         param.integer.value = 0x01;
 714         input.count = 1;
 715         input.pointer = &param;
 716         status = acpi_evaluate_integer(handle, "TCMD", &input, &output);
 717         if (ACPI_SUCCESS(status))
 718                 *value = output;
 719         return status;
 720 }
 721
 722 static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
 723 {
 724         unsigned long long val = 0;
 725         struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 726
 727         if (event == 0x81) {
 728                 if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val)))
 729                         input_report_switch(inputdev, SW_TABLET_MODE, !val);
 730         }
 731 }
 732
 733 static void cmpc_tablet_idev_init(struct input_dev *inputdev)
 734 {
 735         unsigned long long val = 0;
 736         struct acpi_device *acpi;
 737
 738         set_bit(EV_SW, inputdev->evbit);
 739         set_bit(SW_TABLET_MODE, inputdev->swbit);
 740
 741         acpi = to_acpi_device(inputdev->dev.parent);
 742         if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
 743                 input_report_switch(inputdev, SW_TABLET_MODE, !val);
 744 }
 745
 746 static int cmpc_tablet_add(struct acpi_device *acpi)
 747 {
 748         return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet",
 749                                            cmpc_tablet_idev_init);
 750 }
 751
 752 static int cmpc_tablet_remove(struct acpi_device *acpi, int type)
 753 {
 754         return cmpc_remove_acpi_notify_device(acpi);
 755 }
 756
 757 #ifdef CONFIG_PM_SLEEP
 758 static int cmpc_tablet_resume(struct device *dev)
 759 {
 760         struct input_dev *inputdev = dev_get_drvdata(dev);
 761
 762         unsigned long long val = 0;
 763         if (ACPI_SUCCESS(cmpc_get_tablet(to_acpi_device(dev)->handle, &val)))
 764                 input_report_switch(inputdev, SW_TABLET_MODE, !val);
 765         return 0;
 766 }
 767 #endif
 768
 769 static SIMPLE_DEV_PM_OPS(cmpc_tablet_pm, NULL, cmpc_tablet_resume);
 770
 771 static const struct acpi_device_id cmpc_tablet_device_ids[] = {
 772         {CMPC_TABLET_HID, 0},
 773         {"", 0}
 774 };
 775
 776 static struct acpi_driver cmpc_tablet_acpi_driver = {
 777         .owner = THIS_MODULE,
 778         .name = "cmpc_tablet",
 779         .class = "cmpc_tablet",
 780         .ids = cmpc_tablet_device_ids,
 781         .ops = {
 782                 .add = cmpc_tablet_add,
 783                 .remove = cmpc_tablet_remove,
 784                 .notify = cmpc_tablet_handler,
 785         },
 786         .drv.pm = &cmpc_tablet_pm,
 787 };
 788
 789
 790 /*
 791  * Backlight code.
 792  */
 793
 794 static acpi_status cmpc_get_brightness(acpi_handle handle,
 795                                        unsigned long long *value)
 796 {
 797         union acpi_object param;
 798         struct acpi_object_list input;
 799         unsigned long long output;
 800         acpi_status status;
 801
 802         param.type = ACPI_TYPE_INTEGER;
 803         param.integer.value = 0xC0;
 804         input.count = 1;
 805         input.pointer = &param;
 806         status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
 807         if (ACPI_SUCCESS(status))
 808                 *value = output;
 809         return status;
 810 }
 811
 812 static acpi_status cmpc_set_brightness(acpi_handle handle,
 813                                        unsigned long long value)
 814 {
 815         union acpi_object param[2];
 816         struct acpi_object_list input;
 817         acpi_status status;
 818         unsigned long long output;
 819
 820         param[0].type = ACPI_TYPE_INTEGER;
 821         param[0].integer.value = 0xC0;
 822         param[1].type = ACPI_TYPE_INTEGER;
 823         param[1].integer.value = value;
 824         input.count = 2;
 825         input.pointer = param;
 826         status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
 827         return status;
 828 }
 829
 830 static int cmpc_bl_get_brightness(struct backlight_device *bd)
 831 {
 832         acpi_status status;
 833         acpi_handle handle;
 834         unsigned long long brightness;
 835
 836         handle = bl_get_data(bd);
 837         status = cmpc_get_brightness(handle, &brightness);
 838         if (ACPI_SUCCESS(status))
 839                 return brightness;
 840         else
 841                 return -1;
 842 }
 843
 844 static int cmpc_bl_update_status(struct backlight_device *bd)
 845 {
 846         acpi_status status;
 847         acpi_handle handle;
 848
 849         handle = bl_get_data(bd);
 850         status = cmpc_set_brightness(handle, bd->props.brightness);
 851         if (ACPI_SUCCESS(status))
 852                 return 0;
 853         else
 854                 return -1;
 855 }
 856
 857 static const struct backlight_ops cmpc_bl_ops = {
 858         .get_brightness = cmpc_bl_get_brightness,
 859         .update_status = cmpc_bl_update_status
 860 };
 861
 862 /*
 863  * RFKILL code.
 864  */
 865
 866 static acpi_status cmpc_get_rfkill_wlan(acpi_handle handle,
 867                                         unsigned long long *value)
 868 {
 869         union acpi_object param;
 870         struct acpi_object_list input;
 871         unsigned long long output;
 872         acpi_status status;
 873
 874         param.type = ACPI_TYPE_INTEGER;
 875         param.integer.value = 0xC1;
 876         input.count = 1;
 877         input.pointer = &param;
 878         status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
 879         if (ACPI_SUCCESS(status))
 880                 *value = output;
 881         return status;
 882 }
 883
 884 static acpi_status cmpc_set_rfkill_wlan(acpi_handle handle,
 885                                         unsigned long long value)
 886 {
 887         union acpi_object param[2];
 888         struct acpi_object_list input;
 889         acpi_status status;
 890         unsigned long long output;
 891
 892         param[0].type = ACPI_TYPE_INTEGER;
 893         param[0].integer.value = 0xC1;
 894         param[1].type = ACPI_TYPE_INTEGER;
 895         param[1].integer.value = value;
 896         input.count = 2;
 897         input.pointer = param;
 898         status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
 899         return status;
 900 }
 901
 902 static void cmpc_rfkill_query(struct rfkill *rfkill, void *data)
 903 {
 904         acpi_status status;
 905         acpi_handle handle;
 906         unsigned long long state;
 907         bool blocked;
 908
 909         handle = data;
 910         status = cmpc_get_rfkill_wlan(handle, &state);
 911         if (ACPI_SUCCESS(status)) {
 912                 blocked = state & 1 ? false : true;
 913                 rfkill_set_sw_state(rfkill, blocked);
 914         }
 915 }
 916
 917 static int cmpc_rfkill_block(void *data, bool blocked)
 918 {
 919         acpi_status status;
 920         acpi_handle handle;
 921         unsigned long long state;
 922         bool is_blocked;
 923
 924         handle = data;
 925         status = cmpc_get_rfkill_wlan(handle, &state);
 926         if (ACPI_FAILURE(status))
 927                 return -ENODEV;
 928         /* Check if we really need to call cmpc_set_rfkill_wlan */
 929         is_blocked = state & 1 ? false : true;
 930         if (is_blocked != blocked) {
 931                 state = blocked ? 0 : 1;
 932                 status = cmpc_set_rfkill_wlan(handle, state);
 933                 if (ACPI_FAILURE(status))
 934                         return -ENODEV;
 935         }
 936         return 0;
 937 }
 938
 939 static const struct rfkill_ops cmpc_rfkill_ops = {
 940         .query = cmpc_rfkill_query,
 941         .set_block = cmpc_rfkill_block,
 942 };
 943
 944 /*
 945  * Common backlight and rfkill code.
 946  */
 947
 948 struct ipml200_dev {
 949         struct backlight_device *bd;
 950         struct rfkill *rf;
 951 };
 952
 953 static int cmpc_ipml_add(struct acpi_device *acpi)
 954 {
 955         int retval;
 956         struct ipml200_dev *ipml;
 957         struct backlight_properties props;
 958
 959         ipml = kmalloc(sizeof(*ipml), GFP_KERNEL);
 960         if (ipml == NULL)
 961                 return -ENOMEM;
 962
 963         memset(&props, 0, sizeof(struct backlight_properties));
 964         props.type = BACKLIGHT_PLATFORM;
 965         props.max_brightness = 7;
 966         ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev,
 967                                              acpi->handle, &cmpc_bl_ops,
 968                                              &props);
 969         if (IS_ERR(ipml->bd)) {
 970                 retval = PTR_ERR(ipml->bd);
 971                 goto out_bd;
 972         }
 973
 974         ipml->rf = rfkill_alloc("cmpc_rfkill", &acpi->dev, RFKILL_TYPE_WLAN,
 975                                 &cmpc_rfkill_ops, acpi->handle);
 976         /*
 977          * If RFKILL is disabled, rfkill_alloc will return ERR_PTR(-ENODEV).
 978          * This is OK, however, since all other uses of the device will not
 979          * derefence it.
 980          */
 981         if (ipml->rf) {
 982                 retval = rfkill_register(ipml->rf);
 983                 if (retval) {
 984                         rfkill_destroy(ipml->rf);
 985                         ipml->rf = NULL;
 986                 }
 987         }
 988
 989         dev_set_drvdata(&acpi->dev, ipml);
 990         return 0;
 991
 992 out_bd:
 993         kfree(ipml);
 994         return retval;
 995 }
 996
 997 static int cmpc_ipml_remove(struct acpi_device *acpi, int type)
 998 {
 999         struct ipml200_dev *ipml;
1000
1001         ipml = dev_get_drvdata(&acpi->dev);
1002
1003         backlight_device_unregister(ipml->bd);
1004
1005         if (ipml->rf) {
1006                 rfkill_unregister(ipml->rf);
1007                 rfkill_destroy(ipml->rf);
1008         }
1009
1010         kfree(ipml);
1011
1012         return 0;
1013 }
1014
1015 static const struct acpi_device_id cmpc_ipml_device_ids[] = {
1016         {CMPC_IPML_HID, 0},
1017         {"", 0}
1018 };
1019
1020 static struct acpi_driver cmpc_ipml_acpi_driver = {
1021         .owner = THIS_MODULE,
1022         .name = "cmpc",
1023         .class = "cmpc",
1024         .ids = cmpc_ipml_device_ids,
1025         .ops = {
1026                 .add = cmpc_ipml_add,
1027                 .remove = cmpc_ipml_remove
1028         }
1029 };
1030
1031
1032 /*
1033  * Extra keys code.
1034  */
1035 static int cmpc_keys_codes[] = {
1036         KEY_UNKNOWN,
1037         KEY_WLAN,
1038         KEY_SWITCHVIDEOMODE,
1039         KEY_BRIGHTNESSDOWN,
1040         KEY_BRIGHTNESSUP,
1041         KEY_VENDOR,
1042         KEY_UNKNOWN,
1043         KEY_CAMERA,
1044         KEY_BACK,
1045         KEY_FORWARD,
1046         KEY_MAX
1047 };
1048
1049 static void cmpc_keys_handler(struct acpi_device *dev, u32 event)
1050 {
1051         struct input_dev *inputdev;
1052         int code = KEY_MAX;
1053
1054         if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes))
1055                 code = cmpc_keys_codes[event & 0x0F];
1056         inputdev = dev_get_drvdata(&dev->dev);
1057         input_report_key(inputdev, code, !(event & 0x10));
1058         input_sync(inputdev);
1059 }
1060
1061 static void cmpc_keys_idev_init(struct input_dev *inputdev)
1062 {
1063         int i;
1064
1065         set_bit(EV_KEY, inputdev->evbit);
1066         for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++)
1067                 set_bit(cmpc_keys_codes[i], inputdev->keybit);
1068 }
1069
1070 static int cmpc_keys_add(struct acpi_device *acpi)
1071 {
1072         return cmpc_add_acpi_notify_device(acpi, "cmpc_keys",
1073                                            cmpc_keys_idev_init);
1074 }
1075
1076 static int cmpc_keys_remove(struct acpi_device *acpi, int type)
1077 {
1078         return cmpc_remove_acpi_notify_device(acpi);
1079 }
1080
1081 static const struct acpi_device_id cmpc_keys_device_ids[] = {
1082         {CMPC_KEYS_HID, 0},
1083         {"", 0}
1084 };
1085
1086 static struct acpi_driver cmpc_keys_acpi_driver = {
1087         .owner = THIS_MODULE,
1088         .name = "cmpc_keys",
1089         .class = "cmpc_keys",
1090         .ids = cmpc_keys_device_ids,
1091         .ops = {
1092                 .add = cmpc_keys_add,
1093                 .remove = cmpc_keys_remove,
1094                 .notify = cmpc_keys_handler,
1095         }
1096 };
1097
1098
1099 /*
1100  * General init/exit code.
1101  */
1102
1103 static int cmpc_init(void)
1104 {
1105         int r;
1106
1107         r = acpi_bus_register_driver(&cmpc_keys_acpi_driver);
1108         if (r)
1109                 goto failed_keys;
1110
1111         r = acpi_bus_register_driver(&cmpc_ipml_acpi_driver);
1112         if (r)
1113                 goto failed_bl;
1114
1115         r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver);
1116         if (r)
1117                 goto failed_tablet;
1118
1119         r = acpi_bus_register_driver(&cmpc_accel_acpi_driver);
1120         if (r)
1121                 goto failed_accel;
1122
1123         r = acpi_bus_register_driver(&cmpc_accel_acpi_driver_v4);
1124         if (r)
1125                 goto failed_accel_v4;
1126
1127         return r;
1128
1129 failed_accel_v4:
1130         acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
1131
1132 failed_accel:
1133         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
1134
1135 failed_tablet:
1136         acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
1137
1138 failed_bl:
1139         acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
1140
1141 failed_keys:
1142         return r;
1143 }
1144
1145 static void cmpc_exit(void)
1146 {
1147         acpi_bus_unregister_driver(&cmpc_accel_acpi_driver_v4);
1148         acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
1149         acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
1150         acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver);
1151         acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
1152 }
1153
1154 module_init(cmpc_init);
1155 module_exit(cmpc_exit);
1156
1157 static const struct acpi_device_id cmpc_device_ids[] = {
1158         {CMPC_ACCEL_HID, 0},
1159         {CMPC_ACCEL_HID_V4, 0},
1160         {CMPC_TABLET_HID, 0},
1161         {CMPC_IPML_HID, 0},
1162         {CMPC_KEYS_HID, 0},
1163         {"", 0}
1164 };
1165
1166 MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);