drivers/hid/hid-asus.c

   1 /*
   2  *  HID driver for Asus notebook built-in keyboard.
   3  *  Fixes small logical maximum to match usage maximum.
   4  *
   5  *  Currently supported devices are:
   6  *    EeeBook X205TA
   7  *    VivoBook E200HA
   8  *
   9  *  Copyright (c) 2016 Yusuke Fujimaki <usk.fujimaki@gmail.com>
  10  *
  11  *  This module based on hid-ortek by
  12  *  Copyright (c) 2010 Johnathon Harris <jmharris@gmail.com>
  13  *  Copyright (c) 2011 Jiri Kosina
  14  *
  15  *  This module has been updated to add support for Asus i2c touchpad.
  16  *
  17  *  Copyright (c) 2016 Brendan McGrath <redmcg@redmandi.dyndns.org>
  18  *  Copyright (c) 2016 Victor Vlasenko <victor.vlasenko@sysgears.com>
  19  *  Copyright (c) 2016 Frederik Wenigwieser <frederik.wenigwieser@gmail.com>
  20  */
  21
  22 /*
  23  * This program is free software; you can redistribute it and/or modify it
  24  * under the terms of the GNU General Public License as published by the Free
  25  * Software Foundation; either version 2 of the License, or (at your option)
  26  * any later version.
  27  */
  28
  29 #include <linux/hid.h>
  30 #include <linux/module.h>
  31 #include <linux/input/mt.h>
  32 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
  33
  34 #include "hid-ids.h"
  35
  36 MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
  37 MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
  38 MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
  39 MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
  40 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
  41
  42 #define T100_TPAD_INTF 2
  43
  44 #define T100CHI_MOUSE_REPORT_ID 0x06
  45 #define FEATURE_REPORT_ID 0x0d
  46 #define INPUT_REPORT_ID 0x5d
  47 #define FEATURE_KBD_REPORT_ID 0x5a
  48 #define FEATURE_KBD_REPORT_SIZE 16
  49
  50 #define SUPPORT_KBD_BACKLIGHT BIT(0)
  51
  52 #define MAX_TOUCH_MAJOR 8
  53 #define MAX_PRESSURE 128
  54
  55 #define BTN_LEFT_MASK 0x01
  56 #define CONTACT_TOOL_TYPE_MASK 0x80
  57 #define CONTACT_X_MSB_MASK 0xf0
  58 #define CONTACT_Y_MSB_MASK 0x0f
  59 #define CONTACT_TOUCH_MAJOR_MASK 0x07
  60 #define CONTACT_PRESSURE_MASK 0x7f
  61
  62 #define QUIRK_FIX_NOTEBOOK_REPORT       BIT(0)
  63 #define QUIRK_NO_INIT_REPORTS           BIT(1)
  64 #define QUIRK_SKIP_INPUT_MAPPING        BIT(2)
  65 #define QUIRK_IS_MULTITOUCH             BIT(3)
  66 #define QUIRK_NO_CONSUMER_USAGES        BIT(4)
  67 #define QUIRK_USE_KBD_BACKLIGHT         BIT(5)
  68 #define QUIRK_T100_KEYBOARD             BIT(6)
  69 #define QUIRK_T100CHI                   BIT(7)
  70
  71 #define I2C_KEYBOARD_QUIRKS                     (QUIRK_FIX_NOTEBOOK_REPORT | \
  72                                                  QUIRK_NO_INIT_REPORTS | \
  73                                                  QUIRK_NO_CONSUMER_USAGES)
  74 #define I2C_TOUCHPAD_QUIRKS                     (QUIRK_NO_INIT_REPORTS | \
  75                                                  QUIRK_SKIP_INPUT_MAPPING | \
  76                                                  QUIRK_IS_MULTITOUCH)
  77
  78 #define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
  79
  80 struct asus_kbd_leds {
  81         struct led_classdev cdev;
  82         struct hid_device *hdev;
  83         struct work_struct work;
  84         unsigned int brightness;
  85         spinlock_t lock;
  86         bool removed;
  87 };
  88
  89 struct asus_touchpad_info {
  90         int max_x;
  91         int max_y;
  92         int res_x;
  93         int res_y;
  94         int contact_size;
  95         int max_contacts;
  96 };
  97
  98 struct asus_drvdata {
  99         unsigned long quirks;
 100         struct input_dev *input;
 101         struct asus_kbd_leds *kbd_backlight;
 102         const struct asus_touchpad_info *tp;
 103         bool enable_backlight;
 104 };
 105
 106 static const struct asus_touchpad_info asus_i2c_tp = {
 107         .max_x = 2794,
 108         .max_y = 1758,
 109         .contact_size = 5,
 110         .max_contacts = 5,
 111 };
 112
 113 static const struct asus_touchpad_info asus_t100ta_tp = {
 114         .max_x = 2240,
 115         .max_y = 1120,
 116         .res_x = 30, /* units/mm */
 117         .res_y = 27, /* units/mm */
 118         .contact_size = 5,
 119         .max_contacts = 5,
 120 };
 121
 122 static const struct asus_touchpad_info asus_t100chi_tp = {
 123         .max_x = 2640,
 124         .max_y = 1320,
 125         .res_x = 31, /* units/mm */
 126         .res_y = 29, /* units/mm */
 127         .contact_size = 3,
 128         .max_contacts = 4,
 129 };
 130
 131 static void asus_report_contact_down(struct asus_drvdata *drvdat,
 132                 int toolType, u8 *data)
 133 {
 134         struct input_dev *input = drvdat->input;
 135         int touch_major, pressure, x, y;
 136
 137         x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
 138         y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
 139
 140         input_report_abs(input, ABS_MT_POSITION_X, x);
 141         input_report_abs(input, ABS_MT_POSITION_Y, y);
 142
 143         if (drvdat->tp->contact_size < 5)
 144                 return;
 145
 146         if (toolType == MT_TOOL_PALM) {
 147                 touch_major = MAX_TOUCH_MAJOR;
 148                 pressure = MAX_PRESSURE;
 149         } else {
 150                 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
 151                 pressure = data[4] & CONTACT_PRESSURE_MASK;
 152         }
 153
 154         input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
 155         input_report_abs(input, ABS_MT_PRESSURE, pressure);
 156 }
 157
 158 /* Required for Synaptics Palm Detection */
 159 static void asus_report_tool_width(struct asus_drvdata *drvdat)
 160 {
 161         struct input_mt *mt = drvdat->input->mt;
 162         struct input_mt_slot *oldest;
 163         int oldid, count, i;
 164
 165         if (drvdat->tp->contact_size < 5)
 166                 return;
 167
 168         oldest = NULL;
 169         oldid = mt->trkid;
 170         count = 0;
 171
 172         for (i = 0; i < mt->num_slots; ++i) {
 173                 struct input_mt_slot *ps = &mt->slots[i];
 174                 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
 175
 176                 if (id < 0)
 177                         continue;
 178                 if ((id - oldid) & TRKID_SGN) {
 179                         oldest = ps;
 180                         oldid = id;
 181                 }
 182                 count++;
 183         }
 184
 185         if (oldest) {
 186                 input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
 187                         input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
 188         }
 189 }
 190
 191 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
 192 {
 193         int i, toolType = MT_TOOL_FINGER;
 194         u8 *contactData = data + 2;
 195
 196         if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
 197                 return 0;
 198
 199         for (i = 0; i < drvdat->tp->max_contacts; i++) {
 200                 bool down = !!(data[1] & BIT(i+3));
 201
 202                 if (drvdat->tp->contact_size >= 5)
 203                         toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
 204                                                 MT_TOOL_PALM : MT_TOOL_FINGER;
 205
 206                 input_mt_slot(drvdat->input, i);
 207                 input_mt_report_slot_state(drvdat->input, toolType, down);
 208
 209                 if (down) {
 210                         asus_report_contact_down(drvdat, toolType, contactData);
 211                         contactData += drvdat->tp->contact_size;
 212                 }
 213         }
 214
 215         input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
 216         asus_report_tool_width(drvdat);
 217
 218         input_mt_sync_frame(drvdat->input);
 219         input_sync(drvdat->input);
 220
 221         return 1;
 222 }
 223
 224 static int asus_raw_event(struct hid_device *hdev,
 225                 struct hid_report *report, u8 *data, int size)
 226 {
 227         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 228
 229         if (drvdata->tp && data[0] == INPUT_REPORT_ID)
 230                 return asus_report_input(drvdata, data, size);
 231
 232         return 0;
 233 }
 234
 235 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
 236 {
 237         unsigned char *dmabuf;
 238         int ret;
 239
 240         dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
 241         if (!dmabuf)
 242                 return -ENOMEM;
 243
 244         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
 245                                  buf_size, HID_FEATURE_REPORT,
 246                                  HID_REQ_SET_REPORT);
 247         kfree(dmabuf);
 248
 249         return ret;
 250 }
 251
 252 static int asus_kbd_init(struct hid_device *hdev)
 253 {
 254         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
 255                      0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
 256         int ret;
 257
 258         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
 259         if (ret < 0)
 260                 hid_err(hdev, "Asus failed to send init command: %d\n", ret);
 261
 262         return ret;
 263 }
 264
 265 static int asus_kbd_get_functions(struct hid_device *hdev,
 266                                   unsigned char *kbd_func)
 267 {
 268         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
 269         u8 *readbuf;
 270         int ret;
 271
 272         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
 273         if (ret < 0) {
 274                 hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
 275                 return ret;
 276         }
 277
 278         readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
 279         if (!readbuf)
 280                 return -ENOMEM;
 281
 282         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
 283                                  FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
 284                                  HID_REQ_GET_REPORT);
 285         if (ret < 0) {
 286                 hid_err(hdev, "Asus failed to request functions: %d\n", ret);
 287                 kfree(readbuf);
 288                 return ret;
 289         }
 290
 291         *kbd_func = readbuf[6];
 292
 293         kfree(readbuf);
 294         return ret;
 295 }
 296
 297 static void asus_schedule_work(struct asus_kbd_leds *led)
 298 {
 299         unsigned long flags;
 300
 301         spin_lock_irqsave(&led->lock, flags);
 302         if (!led->removed)
 303                 schedule_work(&led->work);
 304         spin_unlock_irqrestore(&led->lock, flags);
 305 }
 306
 307 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
 308                                    enum led_brightness brightness)
 309 {
 310         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
 311                                                  cdev);
 312         unsigned long flags;
 313
 314         spin_lock_irqsave(&led->lock, flags);
 315         led->brightness = brightness;
 316         spin_unlock_irqrestore(&led->lock, flags);
 317
 318         asus_schedule_work(led);
 319 }
 320
 321 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
 322 {
 323         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
 324                                                  cdev);
 325         enum led_brightness brightness;
 326         unsigned long flags;
 327
 328         spin_lock_irqsave(&led->lock, flags);
 329         brightness = led->brightness;
 330         spin_unlock_irqrestore(&led->lock, flags);
 331
 332         return brightness;
 333 }
 334
 335 static void asus_kbd_backlight_work(struct work_struct *work)
 336 {
 337         struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
 338         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
 339         int ret;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&led->lock, flags);
 343         buf[4] = led->brightness;
 344         spin_unlock_irqrestore(&led->lock, flags);
 345
 346         ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
 347         if (ret < 0)
 348                 hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
 349 }
 350
 351 static int asus_kbd_register_leds(struct hid_device *hdev)
 352 {
 353         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 354         unsigned char kbd_func;
 355         int ret;
 356
 357         /* Initialize keyboard */
 358         ret = asus_kbd_init(hdev);
 359         if (ret < 0)
 360                 return ret;
 361
 362         /* Get keyboard functions */
 363         ret = asus_kbd_get_functions(hdev, &kbd_func);
 364         if (ret < 0)
 365                 return ret;
 366
 367         /* Check for backlight support */
 368         if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
 369                 return -ENODEV;
 370
 371         drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
 372                                               sizeof(struct asus_kbd_leds),
 373                                               GFP_KERNEL);
 374         if (!drvdata->kbd_backlight)
 375                 return -ENOMEM;
 376
 377         drvdata->kbd_backlight->removed = false;
 378         drvdata->kbd_backlight->brightness = 0;
 379         drvdata->kbd_backlight->hdev = hdev;
 380         drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
 381         drvdata->kbd_backlight->cdev.max_brightness = 3;
 382         drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
 383         drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
 384         INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
 385         spin_lock_init(&drvdata->kbd_backlight->lock);
 386
 387         ret = devm_led_classdev_register(&hdev->dev, &drvdata->kbd_backlight->cdev);
 388         if (ret < 0) {
 389                 /* No need to have this still around */
 390                 devm_kfree(&hdev->dev, drvdata->kbd_backlight);
 391         }
 392
 393         return ret;
 394 }
 395
 396 static int asus_input_configured(struct hid_device *hdev, struct hid_input *hi)
 397 {
 398         struct input_dev *input = hi->input;
 399         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 400
 401         /* T100CHI uses MULTI_INPUT, bind the touchpad to the mouse hid_input */
 402         if (drvdata->quirks & QUIRK_T100CHI &&
 403             hi->report->id != T100CHI_MOUSE_REPORT_ID)
 404                 return 0;
 405
 406         if (drvdata->tp) {
 407                 int ret;
 408
 409                 input_set_abs_params(input, ABS_MT_POSITION_X, 0,
 410                                      drvdata->tp->max_x, 0, 0);
 411                 input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
 412                                      drvdata->tp->max_y, 0, 0);
 413                 input_abs_set_res(input, ABS_MT_POSITION_X, drvdata->tp->res_x);
 414                 input_abs_set_res(input, ABS_MT_POSITION_Y, drvdata->tp->res_y);
 415
 416                 if (drvdata->tp->contact_size >= 5) {
 417                         input_set_abs_params(input, ABS_TOOL_WIDTH, 0,
 418                                              MAX_TOUCH_MAJOR, 0, 0);
 419                         input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0,
 420                                              MAX_TOUCH_MAJOR, 0, 0);
 421                         input_set_abs_params(input, ABS_MT_PRESSURE, 0,
 422                                               MAX_PRESSURE, 0, 0);
 423                 }
 424
 425                 __set_bit(BTN_LEFT, input->keybit);
 426                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 427
 428                 ret = input_mt_init_slots(input, drvdata->tp->max_contacts,
 429                                           INPUT_MT_POINTER);
 430
 431                 if (ret) {
 432                         hid_err(hdev, "Asus input mt init slots failed: %d\n", ret);
 433                         return ret;
 434                 }
 435         }
 436
 437         drvdata->input = input;
 438
 439         if (drvdata->enable_backlight && asus_kbd_register_leds(hdev))
 440                 hid_warn(hdev, "Failed to initialize backlight.\n");
 441
 442         return 0;
 443 }
 444
 445 #define asus_map_key_clear(c)   hid_map_usage_clear(hi, usage, bit, \
 446                                                     max, EV_KEY, (c))
 447 static int asus_input_mapping(struct hid_device *hdev,
 448                 struct hid_input *hi, struct hid_field *field,
 449                 struct hid_usage *usage, unsigned long **bit,
 450                 int *max)
 451 {
 452         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 453
 454         if (drvdata->quirks & QUIRK_SKIP_INPUT_MAPPING) {
 455                 /* Don't map anything from the HID report.
 456                  * We do it all manually in asus_input_configured
 457                  */
 458                 return -1;
 459         }
 460
 461         /*
 462          * Ignore a bunch of bogus collections in the T100CHI descriptor.
 463          * This avoids a bunch of non-functional hid_input devices getting
 464          * created because of the T100CHI using HID_QUIRK_MULTI_INPUT.
 465          */
 466         if (drvdata->quirks & QUIRK_T100CHI) {
 467                 if (field->application == (HID_UP_GENDESK | 0x0080) ||
 468                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0024) ||
 469                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0025) ||
 470                     usage->hid == (HID_UP_GENDEVCTRLS | 0x0026))
 471                         return -1;
 472                 /*
 473                  * We use the hid_input for the mouse report for the touchpad,
 474                  * keep the left button, to avoid the core removing it.
 475                  */
 476                 if (field->application == HID_GD_MOUSE &&
 477                     usage->hid != (HID_UP_BUTTON | 1))
 478                         return -1;
 479         }
 480
 481         /* ASUS-specific keyboard hotkeys */
 482         if ((usage->hid & HID_USAGE_PAGE) == 0xff310000) {
 483                 set_bit(EV_REP, hi->input->evbit);
 484                 switch (usage->hid & HID_USAGE) {
 485                 case 0x10: asus_map_key_clear(KEY_BRIGHTNESSDOWN);      break;
 486                 case 0x20: asus_map_key_clear(KEY_BRIGHTNESSUP);                break;
 487                 case 0x35: asus_map_key_clear(KEY_DISPLAY_OFF);         break;
 488                 case 0x6c: asus_map_key_clear(KEY_SLEEP);               break;
 489                 case 0x82: asus_map_key_clear(KEY_CAMERA);              break;
 490                 case 0x88: asus_map_key_clear(KEY_RFKILL);                      break;
 491                 case 0xb5: asus_map_key_clear(KEY_CALC);                        break;
 492                 case 0xc4: asus_map_key_clear(KEY_KBDILLUMUP);          break;
 493                 case 0xc5: asus_map_key_clear(KEY_KBDILLUMDOWN);                break;
 494
 495                 /* ASUS touchpad toggle */
 496                 case 0x6b: asus_map_key_clear(KEY_F21);                 break;
 497
 498                 /* ROG key */
 499                 case 0x38: asus_map_key_clear(KEY_PROG1);               break;
 500
 501                 /* Fn+C ASUS Splendid */
 502                 case 0xba: asus_map_key_clear(KEY_PROG2);               break;
 503
 504                 /* Fn+Space Power4Gear Hybrid */
 505                 case 0x5c: asus_map_key_clear(KEY_PROG3);               break;
 506
 507                 default:
 508                         /* ASUS lazily declares 256 usages, ignore the rest,
 509                          * as some make the keyboard appear as a pointer device. */
 510                         return -1;
 511                 }
 512
 513                 /*
 514                  * Check and enable backlight only on devices with UsagePage ==
 515                  * 0xff31 to avoid initializing the keyboard firmware multiple
 516                  * times on devices with multiple HID descriptors but same
 517                  * PID/VID.
 518                  */
 519                 if (drvdata->quirks & QUIRK_USE_KBD_BACKLIGHT)
 520                         drvdata->enable_backlight = true;
 521
 522                 return 1;
 523         }
 524
 525         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_MSVENDOR) {
 526                 set_bit(EV_REP, hi->input->evbit);
 527                 switch (usage->hid & HID_USAGE) {
 528                 case 0xff01: asus_map_key_clear(BTN_1); break;
 529                 case 0xff02: asus_map_key_clear(BTN_2); break;
 530                 case 0xff03: asus_map_key_clear(BTN_3); break;
 531                 case 0xff04: asus_map_key_clear(BTN_4); break;
 532                 case 0xff05: asus_map_key_clear(BTN_5); break;
 533                 case 0xff06: asus_map_key_clear(BTN_6); break;
 534                 case 0xff07: asus_map_key_clear(BTN_7); break;
 535                 case 0xff08: asus_map_key_clear(BTN_8); break;
 536                 case 0xff09: asus_map_key_clear(BTN_9); break;
 537                 case 0xff0a: asus_map_key_clear(BTN_A); break;
 538                 case 0xff0b: asus_map_key_clear(BTN_B); break;
 539                 case 0x00f1: asus_map_key_clear(KEY_WLAN);      break;
 540                 case 0x00f2: asus_map_key_clear(KEY_BRIGHTNESSDOWN);    break;
 541                 case 0x00f3: asus_map_key_clear(KEY_BRIGHTNESSUP);      break;
 542                 case 0x00f4: asus_map_key_clear(KEY_DISPLAY_OFF);       break;
 543                 case 0x00f7: asus_map_key_clear(KEY_CAMERA);    break;
 544                 case 0x00f8: asus_map_key_clear(KEY_PROG1);     break;
 545                 default:
 546                         return 0;
 547                 }
 548
 549                 return 1;
 550         }
 551
 552         if (drvdata->quirks & QUIRK_NO_CONSUMER_USAGES &&
 553                 (usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
 554                 switch (usage->hid & HID_USAGE) {
 555                 case 0xe2: /* Mute */
 556                 case 0xe9: /* Volume up */
 557                 case 0xea: /* Volume down */
 558                         return 0;
 559                 default:
 560                         /* Ignore dummy Consumer usages which make the
 561                          * keyboard incorrectly appear as a pointer device.
 562                          */
 563                         return -1;
 564                 }
 565         }
 566
 567         return 0;
 568 }
 569
 570 static int asus_start_multitouch(struct hid_device *hdev)
 571 {
 572         int ret;
 573         const unsigned char buf[] = { FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00 };
 574         unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
 575
 576         if (!dmabuf) {
 577                 ret = -ENOMEM;
 578                 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
 579                 return ret;
 580         }
 581
 582         ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
 583                                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 584
 585         kfree(dmabuf);
 586
 587         if (ret != sizeof(buf)) {
 588                 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
 589                 return ret;
 590         }
 591
 592         return 0;
 593 }
 594
 595 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
 596 {
 597         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 598
 599         if (drvdata->tp)
 600                 return asus_start_multitouch(hdev);
 601
 602         return 0;
 603 }
 604
 605 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
 606 {
 607         int ret;
 608         struct asus_drvdata *drvdata;
 609
 610         drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
 611         if (drvdata == NULL) {
 612                 hid_err(hdev, "Can't alloc Asus descriptor\n");
 613                 return -ENOMEM;
 614         }
 615
 616         hid_set_drvdata(hdev, drvdata);
 617
 618         drvdata->quirks = id->driver_data;
 619
 620         if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
 621                 drvdata->tp = &asus_i2c_tp;
 622
 623         if ((drvdata->quirks & QUIRK_T100_KEYBOARD) && hid_is_usb(hdev)) {
 624                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 625
 626                 if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
 627                         drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
 628                         drvdata->tp = &asus_t100ta_tp;
 629                 }
 630         }
 631
 632         if (drvdata->quirks & QUIRK_T100CHI) {
 633                 /*
 634                  * All functionality is on a single HID interface and for
 635                  * userspace the touchpad must be a separate input_dev.
 636                  */
 637                 hdev->quirks |= HID_QUIRK_MULTI_INPUT |
 638                                 HID_QUIRK_NO_EMPTY_INPUT;
 639                 drvdata->tp = &asus_t100chi_tp;
 640         }
 641
 642         if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
 643                 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 644
 645         ret = hid_parse(hdev);
 646         if (ret) {
 647                 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
 648                 return ret;
 649         }
 650
 651         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 652         if (ret) {
 653                 hid_err(hdev, "Asus hw start failed: %d\n", ret);
 654                 return ret;
 655         }
 656
 657         if (!drvdata->input) {
 658                 hid_err(hdev, "Asus input not registered\n");
 659                 ret = -ENOMEM;
 660                 goto err_stop_hw;
 661         }
 662
 663         if (drvdata->tp) {
 664                 drvdata->input->name = "Asus TouchPad";
 665         } else {
 666                 drvdata->input->name = "Asus Keyboard";
 667         }
 668
 669         if (drvdata->tp) {
 670                 ret = asus_start_multitouch(hdev);
 671                 if (ret)
 672                         goto err_stop_hw;
 673         }
 674
 675         return 0;
 676 err_stop_hw:
 677         hid_hw_stop(hdev);
 678         return ret;
 679 }
 680
 681 static void asus_remove(struct hid_device *hdev)
 682 {
 683         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 684         unsigned long flags;
 685
 686         if (drvdata->kbd_backlight) {
 687                 spin_lock_irqsave(&drvdata->kbd_backlight->lock, flags);
 688                 drvdata->kbd_backlight->removed = true;
 689                 spin_unlock_irqrestore(&drvdata->kbd_backlight->lock, flags);
 690
 691                 cancel_work_sync(&drvdata->kbd_backlight->work);
 692         }
 693
 694         hid_hw_stop(hdev);
 695 }
 696
 697 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 698                 unsigned int *rsize)
 699 {
 700         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 701
 702         if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
 703                         *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
 704                 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
 705                 rdesc[55] = 0xdd;
 706         }
 707         /* For the T100TA keyboard dock */
 708         if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
 709                  *rsize == 76 && rdesc[73] == 0x81 && rdesc[74] == 0x01) {
 710                 hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
 711                 rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
 712         }
 713         /* For the T100CHI keyboard dock */
 714         if (drvdata->quirks & QUIRK_T100CHI &&
 715                  *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
 716                 /*
 717                  * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
 718                  * (FFh) and clear the flags in the Input() byte.
 719                  * Note the descriptor has a bogus 0 byte at the end so we
 720                  * only need 1 extra byte.
 721                  */
 722                 *rsize = 404;
 723                 rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
 724                 if (!rdesc)
 725                         return NULL;
 726
 727                 hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
 728                 memmove(rdesc + 392, rdesc + 390, 12);
 729                 rdesc[388] = 0x19;
 730                 rdesc[389] = 0x00;
 731                 rdesc[390] = 0x29;
 732                 rdesc[391] = 0xff;
 733                 rdesc[402] = 0x00;
 734         }
 735
 736         return rdesc;
 737 }
 738
 739 static const struct hid_device_id asus_devices[] = {
 740         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 741                 USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
 742         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 743                 USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
 744         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 745                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) },
 746         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 747                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
 748         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 749                 USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD),
 750           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
 751         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
 752         { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
 753         { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
 754         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 755                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
 756
 757         { }
 758 };
 759 MODULE_DEVICE_TABLE(hid, asus_devices);
 760
 761 static struct hid_driver asus_driver = {
 762         .name                   = "asus",
 763         .id_table               = asus_devices,
 764         .report_fixup           = asus_report_fixup,
 765         .probe                  = asus_probe,
 766         .remove                 = asus_remove,
 767         .input_mapping          = asus_input_mapping,
 768         .input_configured       = asus_input_configured,
 769 #ifdef CONFIG_PM
 770         .reset_resume           = asus_reset_resume,
 771 #endif
 772         .raw_event              = asus_raw_event
 773 };
 774 module_hid_driver(asus_driver);
 775
 776 MODULE_LICENSE("GPL");