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/dmi.h>
  30 #include <linux/hid.h>
  31 #include <linux/module.h>
  32 #include <linux/input/mt.h>
  33 #include <linux/usb.h> /* For to_usb_interface for T100 touchpad intf check */
  34
  35 #include "hid-ids.h"
  36
  37 MODULE_AUTHOR("Yusuke Fujimaki <usk.fujimaki@gmail.com>");
  38 MODULE_AUTHOR("Brendan McGrath <redmcg@redmandi.dyndns.org>");
  39 MODULE_AUTHOR("Victor Vlasenko <victor.vlasenko@sysgears.com>");
  40 MODULE_AUTHOR("Frederik Wenigwieser <frederik.wenigwieser@gmail.com>");
  41 MODULE_DESCRIPTION("Asus HID Keyboard and TouchPad");
  42
  43 #define T100_TPAD_INTF 2
  44
  45 #define T100CHI_MOUSE_REPORT_ID 0x06
  46 #define FEATURE_REPORT_ID 0x0d
  47 #define INPUT_REPORT_ID 0x5d
  48 #define FEATURE_KBD_REPORT_ID 0x5a
  49 #define FEATURE_KBD_REPORT_SIZE 16
  50
  51 #define SUPPORT_KBD_BACKLIGHT BIT(0)
  52
  53 #define MAX_TOUCH_MAJOR 8
  54 #define MAX_PRESSURE 128
  55
  56 #define BTN_LEFT_MASK 0x01
  57 #define CONTACT_TOOL_TYPE_MASK 0x80
  58 #define CONTACT_X_MSB_MASK 0xf0
  59 #define CONTACT_Y_MSB_MASK 0x0f
  60 #define CONTACT_TOUCH_MAJOR_MASK 0x07
  61 #define CONTACT_PRESSURE_MASK 0x7f
  62
  63 #define QUIRK_FIX_NOTEBOOK_REPORT       BIT(0)
  64 #define QUIRK_NO_INIT_REPORTS           BIT(1)
  65 #define QUIRK_SKIP_INPUT_MAPPING        BIT(2)
  66 #define QUIRK_IS_MULTITOUCH             BIT(3)
  67 #define QUIRK_NO_CONSUMER_USAGES        BIT(4)
  68 #define QUIRK_USE_KBD_BACKLIGHT         BIT(5)
  69 #define QUIRK_T100_KEYBOARD             BIT(6)
  70 #define QUIRK_T100CHI                   BIT(7)
  71 #define QUIRK_G752_KEYBOARD             BIT(8)
  72
  73 #define I2C_KEYBOARD_QUIRKS                     (QUIRK_FIX_NOTEBOOK_REPORT | \
  74                                                  QUIRK_NO_INIT_REPORTS | \
  75                                                  QUIRK_NO_CONSUMER_USAGES)
  76 #define I2C_TOUCHPAD_QUIRKS                     (QUIRK_NO_INIT_REPORTS | \
  77                                                  QUIRK_SKIP_INPUT_MAPPING | \
  78                                                  QUIRK_IS_MULTITOUCH)
  79
  80 #define TRKID_SGN       ((TRKID_MAX + 1) >> 1)
  81
  82 struct asus_kbd_leds {
  83         struct led_classdev cdev;
  84         struct hid_device *hdev;
  85         struct work_struct work;
  86         unsigned int brightness;
  87         bool removed;
  88 };
  89
  90 struct asus_touchpad_info {
  91         int max_x;
  92         int max_y;
  93         int res_x;
  94         int res_y;
  95         int contact_size;
  96         int max_contacts;
  97 };
  98
  99 struct asus_drvdata {
 100         unsigned long quirks;
 101         struct input_dev *input;
 102         struct asus_kbd_leds *kbd_backlight;
 103         const struct asus_touchpad_info *tp;
 104         bool enable_backlight;
 105 };
 106
 107 static const struct asus_touchpad_info asus_i2c_tp = {
 108         .max_x = 2794,
 109         .max_y = 1758,
 110         .contact_size = 5,
 111         .max_contacts = 5,
 112 };
 113
 114 static const struct asus_touchpad_info asus_t100ta_tp = {
 115         .max_x = 2240,
 116         .max_y = 1120,
 117         .res_x = 30, /* units/mm */
 118         .res_y = 27, /* units/mm */
 119         .contact_size = 5,
 120         .max_contacts = 5,
 121 };
 122
 123 static const struct asus_touchpad_info asus_t100ha_tp = {
 124         .max_x = 2640,
 125         .max_y = 1320,
 126         .res_x = 30, /* units/mm */
 127         .res_y = 29, /* units/mm */
 128         .contact_size = 5,
 129         .max_contacts = 5,
 130 };
 131
 132 static const struct asus_touchpad_info asus_t200ta_tp = {
 133         .max_x = 3120,
 134         .max_y = 1716,
 135         .res_x = 30, /* units/mm */
 136         .res_y = 28, /* units/mm */
 137         .contact_size = 5,
 138         .max_contacts = 5,
 139 };
 140
 141 static const struct asus_touchpad_info asus_t100chi_tp = {
 142         .max_x = 2640,
 143         .max_y = 1320,
 144         .res_x = 31, /* units/mm */
 145         .res_y = 29, /* units/mm */
 146         .contact_size = 3,
 147         .max_contacts = 4,
 148 };
 149
 150 static void asus_report_contact_down(struct asus_drvdata *drvdat,
 151                 int toolType, u8 *data)
 152 {
 153         struct input_dev *input = drvdat->input;
 154         int touch_major, pressure, x, y;
 155
 156         x = (data[0] & CONTACT_X_MSB_MASK) << 4 | data[1];
 157         y = drvdat->tp->max_y - ((data[0] & CONTACT_Y_MSB_MASK) << 8 | data[2]);
 158
 159         input_report_abs(input, ABS_MT_POSITION_X, x);
 160         input_report_abs(input, ABS_MT_POSITION_Y, y);
 161
 162         if (drvdat->tp->contact_size < 5)
 163                 return;
 164
 165         if (toolType == MT_TOOL_PALM) {
 166                 touch_major = MAX_TOUCH_MAJOR;
 167                 pressure = MAX_PRESSURE;
 168         } else {
 169                 touch_major = (data[3] >> 4) & CONTACT_TOUCH_MAJOR_MASK;
 170                 pressure = data[4] & CONTACT_PRESSURE_MASK;
 171         }
 172
 173         input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
 174         input_report_abs(input, ABS_MT_PRESSURE, pressure);
 175 }
 176
 177 /* Required for Synaptics Palm Detection */
 178 static void asus_report_tool_width(struct asus_drvdata *drvdat)
 179 {
 180         struct input_mt *mt = drvdat->input->mt;
 181         struct input_mt_slot *oldest;
 182         int oldid, count, i;
 183
 184         if (drvdat->tp->contact_size < 5)
 185                 return;
 186
 187         oldest = NULL;
 188         oldid = mt->trkid;
 189         count = 0;
 190
 191         for (i = 0; i < mt->num_slots; ++i) {
 192                 struct input_mt_slot *ps = &mt->slots[i];
 193                 int id = input_mt_get_value(ps, ABS_MT_TRACKING_ID);
 194
 195                 if (id < 0)
 196                         continue;
 197                 if ((id - oldid) & TRKID_SGN) {
 198                         oldest = ps;
 199                         oldid = id;
 200                 }
 201                 count++;
 202         }
 203
 204         if (oldest) {
 205                 input_report_abs(drvdat->input, ABS_TOOL_WIDTH,
 206                         input_mt_get_value(oldest, ABS_MT_TOUCH_MAJOR));
 207         }
 208 }
 209
 210 static int asus_report_input(struct asus_drvdata *drvdat, u8 *data, int size)
 211 {
 212         int i, toolType = MT_TOOL_FINGER;
 213         u8 *contactData = data + 2;
 214
 215         if (size != 3 + drvdat->tp->contact_size * drvdat->tp->max_contacts)
 216                 return 0;
 217
 218         for (i = 0; i < drvdat->tp->max_contacts; i++) {
 219                 bool down = !!(data[1] & BIT(i+3));
 220
 221                 if (drvdat->tp->contact_size >= 5)
 222                         toolType = contactData[3] & CONTACT_TOOL_TYPE_MASK ?
 223                                                 MT_TOOL_PALM : MT_TOOL_FINGER;
 224
 225                 input_mt_slot(drvdat->input, i);
 226                 input_mt_report_slot_state(drvdat->input, toolType, down);
 227
 228                 if (down) {
 229                         asus_report_contact_down(drvdat, toolType, contactData);
 230                         contactData += drvdat->tp->contact_size;
 231                 }
 232         }
 233
 234         input_report_key(drvdat->input, BTN_LEFT, data[1] & BTN_LEFT_MASK);
 235         asus_report_tool_width(drvdat);
 236
 237         input_mt_sync_frame(drvdat->input);
 238         input_sync(drvdat->input);
 239
 240         return 1;
 241 }
 242
 243 static int asus_raw_event(struct hid_device *hdev,
 244                 struct hid_report *report, u8 *data, int size)
 245 {
 246         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 247
 248         if (drvdata->tp && data[0] == INPUT_REPORT_ID)
 249                 return asus_report_input(drvdata, data, size);
 250
 251         return 0;
 252 }
 253
 254 static int asus_kbd_set_report(struct hid_device *hdev, u8 *buf, size_t buf_size)
 255 {
 256         unsigned char *dmabuf;
 257         int ret;
 258
 259         dmabuf = kmemdup(buf, buf_size, GFP_KERNEL);
 260         if (!dmabuf)
 261                 return -ENOMEM;
 262
 263         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, dmabuf,
 264                                  buf_size, HID_FEATURE_REPORT,
 265                                  HID_REQ_SET_REPORT);
 266         kfree(dmabuf);
 267
 268         return ret;
 269 }
 270
 271 static int asus_kbd_init(struct hid_device *hdev)
 272 {
 273         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x41, 0x53, 0x55, 0x53, 0x20, 0x54,
 274                      0x65, 0x63, 0x68, 0x2e, 0x49, 0x6e, 0x63, 0x2e, 0x00 };
 275         int ret;
 276
 277         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
 278         if (ret < 0)
 279                 hid_err(hdev, "Asus failed to send init command: %d\n", ret);
 280
 281         return ret;
 282 }
 283
 284 static int asus_kbd_get_functions(struct hid_device *hdev,
 285                                   unsigned char *kbd_func)
 286 {
 287         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0x05, 0x20, 0x31, 0x00, 0x08 };
 288         u8 *readbuf;
 289         int ret;
 290
 291         ret = asus_kbd_set_report(hdev, buf, sizeof(buf));
 292         if (ret < 0) {
 293                 hid_err(hdev, "Asus failed to send configuration command: %d\n", ret);
 294                 return ret;
 295         }
 296
 297         readbuf = kzalloc(FEATURE_KBD_REPORT_SIZE, GFP_KERNEL);
 298         if (!readbuf)
 299                 return -ENOMEM;
 300
 301         ret = hid_hw_raw_request(hdev, FEATURE_KBD_REPORT_ID, readbuf,
 302                                  FEATURE_KBD_REPORT_SIZE, HID_FEATURE_REPORT,
 303                                  HID_REQ_GET_REPORT);
 304         if (ret < 0) {
 305                 hid_err(hdev, "Asus failed to request functions: %d\n", ret);
 306                 kfree(readbuf);
 307                 return ret;
 308         }
 309
 310         *kbd_func = readbuf[6];
 311
 312         kfree(readbuf);
 313         return ret;
 314 }
 315
 316 static void asus_kbd_backlight_set(struct led_classdev *led_cdev,
 317                                    enum led_brightness brightness)
 318 {
 319         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
 320                                                  cdev);
 321         if (led->brightness == brightness)
 322                 return;
 323
 324         led->brightness = brightness;
 325         schedule_work(&led->work);
 326 }
 327
 328 static enum led_brightness asus_kbd_backlight_get(struct led_classdev *led_cdev)
 329 {
 330         struct asus_kbd_leds *led = container_of(led_cdev, struct asus_kbd_leds,
 331                                                  cdev);
 332
 333         return led->brightness;
 334 }
 335
 336 static void asus_kbd_backlight_work(struct work_struct *work)
 337 {
 338         struct asus_kbd_leds *led = container_of(work, struct asus_kbd_leds, work);
 339         u8 buf[] = { FEATURE_KBD_REPORT_ID, 0xba, 0xc5, 0xc4, 0x00 };
 340         int ret;
 341
 342         if (led->removed)
 343                 return;
 344
 345         buf[4] = led->brightness;
 346
 347         ret = asus_kbd_set_report(led->hdev, buf, sizeof(buf));
 348         if (ret < 0)
 349                 hid_err(led->hdev, "Asus failed to set keyboard backlight: %d\n", ret);
 350 }
 351
 352 static int asus_kbd_register_leds(struct hid_device *hdev)
 353 {
 354         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 355         unsigned char kbd_func;
 356         int ret;
 357
 358         /* Initialize keyboard */
 359         ret = asus_kbd_init(hdev);
 360         if (ret < 0)
 361                 return ret;
 362
 363         /* Get keyboard functions */
 364         ret = asus_kbd_get_functions(hdev, &kbd_func);
 365         if (ret < 0)
 366                 return ret;
 367
 368         /* Check for backlight support */
 369         if (!(kbd_func & SUPPORT_KBD_BACKLIGHT))
 370                 return -ENODEV;
 371
 372         drvdata->kbd_backlight = devm_kzalloc(&hdev->dev,
 373                                               sizeof(struct asus_kbd_leds),
 374                                               GFP_KERNEL);
 375         if (!drvdata->kbd_backlight)
 376                 return -ENOMEM;
 377
 378         drvdata->kbd_backlight->removed = false;
 379         drvdata->kbd_backlight->brightness = 0;
 380         drvdata->kbd_backlight->hdev = hdev;
 381         drvdata->kbd_backlight->cdev.name = "asus::kbd_backlight";
 382         drvdata->kbd_backlight->cdev.max_brightness = 3;
 383         drvdata->kbd_backlight->cdev.brightness_set = asus_kbd_backlight_set;
 384         drvdata->kbd_backlight->cdev.brightness_get = asus_kbd_backlight_get;
 385         INIT_WORK(&drvdata->kbd_backlight->work, asus_kbd_backlight_work);
 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         static const unsigned char buf[] = {
 574                 FEATURE_REPORT_ID, 0x00, 0x03, 0x01, 0x00
 575         };
 576         unsigned char *dmabuf = kmemdup(buf, sizeof(buf), GFP_KERNEL);
 577
 578         if (!dmabuf) {
 579                 ret = -ENOMEM;
 580                 hid_err(hdev, "Asus failed to alloc dma buf: %d\n", ret);
 581                 return ret;
 582         }
 583
 584         ret = hid_hw_raw_request(hdev, dmabuf[0], dmabuf, sizeof(buf),
 585                                         HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 586
 587         kfree(dmabuf);
 588
 589         if (ret != sizeof(buf)) {
 590                 hid_err(hdev, "Asus failed to start multitouch: %d\n", ret);
 591                 return ret;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static int __maybe_unused asus_reset_resume(struct hid_device *hdev)
 598 {
 599         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 600
 601         if (drvdata->tp)
 602                 return asus_start_multitouch(hdev);
 603
 604         return 0;
 605 }
 606
 607 static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
 608 {
 609         int ret;
 610         struct asus_drvdata *drvdata;
 611
 612         drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
 613         if (drvdata == NULL) {
 614                 hid_err(hdev, "Can't alloc Asus descriptor\n");
 615                 return -ENOMEM;
 616         }
 617
 618         hid_set_drvdata(hdev, drvdata);
 619
 620         drvdata->quirks = id->driver_data;
 621
 622         if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
 623                 drvdata->tp = &asus_i2c_tp;
 624
 625         if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
 626                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 627
 628                 if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
 629                         drvdata->quirks = QUIRK_SKIP_INPUT_MAPPING;
 630                         /*
 631                          * The T100HA uses the same USB-ids as the T100TAF and
 632                          * the T200TA uses the same USB-ids as the T100TA, while
 633                          * both have different max x/y values as the T100TA[F].
 634                          */
 635                         if (dmi_match(DMI_PRODUCT_NAME, "T100HAN"))
 636                                 drvdata->tp = &asus_t100ha_tp;
 637                         else if (dmi_match(DMI_PRODUCT_NAME, "T200TA"))
 638                                 drvdata->tp = &asus_t200ta_tp;
 639                         else
 640                                 drvdata->tp = &asus_t100ta_tp;
 641                 }
 642         }
 643
 644         if (drvdata->quirks & QUIRK_T100CHI) {
 645                 /*
 646                  * All functionality is on a single HID interface and for
 647                  * userspace the touchpad must be a separate input_dev.
 648                  */
 649                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
 650                 drvdata->tp = &asus_t100chi_tp;
 651         }
 652
 653         if (drvdata->quirks & QUIRK_NO_INIT_REPORTS)
 654                 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
 655
 656         ret = hid_parse(hdev);
 657         if (ret) {
 658                 hid_err(hdev, "Asus hid parse failed: %d\n", ret);
 659                 return ret;
 660         }
 661
 662         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 663         if (ret) {
 664                 hid_err(hdev, "Asus hw start failed: %d\n", ret);
 665                 return ret;
 666         }
 667
 668         if (!drvdata->input) {
 669                 hid_err(hdev, "Asus input not registered\n");
 670                 ret = -ENOMEM;
 671                 goto err_stop_hw;
 672         }
 673
 674         if (drvdata->tp) {
 675                 drvdata->input->name = "Asus TouchPad";
 676         } else {
 677                 drvdata->input->name = "Asus Keyboard";
 678         }
 679
 680         if (drvdata->tp) {
 681                 ret = asus_start_multitouch(hdev);
 682                 if (ret)
 683                         goto err_stop_hw;
 684         }
 685
 686         return 0;
 687 err_stop_hw:
 688         hid_hw_stop(hdev);
 689         return ret;
 690 }
 691
 692 static void asus_remove(struct hid_device *hdev)
 693 {
 694         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 695
 696         if (drvdata->kbd_backlight) {
 697                 drvdata->kbd_backlight->removed = true;
 698                 cancel_work_sync(&drvdata->kbd_backlight->work);
 699         }
 700
 701         hid_hw_stop(hdev);
 702 }
 703
 704 static const __u8 asus_g752_fixed_rdesc[] = {
 705         0x19, 0x00,                     /*   Usage Minimum (0x00)       */
 706         0x2A, 0xFF, 0x00,               /*   Usage Maximum (0xFF)       */
 707 };
 708
 709 static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 710                 unsigned int *rsize)
 711 {
 712         struct asus_drvdata *drvdata = hid_get_drvdata(hdev);
 713
 714         if (drvdata->quirks & QUIRK_FIX_NOTEBOOK_REPORT &&
 715                         *rsize >= 56 && rdesc[54] == 0x25 && rdesc[55] == 0x65) {
 716                 hid_info(hdev, "Fixing up Asus notebook report descriptor\n");
 717                 rdesc[55] = 0xdd;
 718         }
 719         /* For the T100TA/T200TA keyboard dock */
 720         if (drvdata->quirks & QUIRK_T100_KEYBOARD &&
 721                  (*rsize == 76 || *rsize == 101) &&
 722                  rdesc[73] == 0x81 && rdesc[74] == 0x01) {
 723                 hid_info(hdev, "Fixing up Asus T100 keyb report descriptor\n");
 724                 rdesc[74] &= ~HID_MAIN_ITEM_CONSTANT;
 725         }
 726         /* For the T100CHI keyboard dock */
 727         if (drvdata->quirks & QUIRK_T100CHI &&
 728                  *rsize == 403 && rdesc[388] == 0x09 && rdesc[389] == 0x76) {
 729                 /*
 730                  * Change Usage (76h) to Usage Minimum (00h), Usage Maximum
 731                  * (FFh) and clear the flags in the Input() byte.
 732                  * Note the descriptor has a bogus 0 byte at the end so we
 733                  * only need 1 extra byte.
 734                  */
 735                 *rsize = 404;
 736                 rdesc = kmemdup(rdesc, *rsize, GFP_KERNEL);
 737                 if (!rdesc)
 738                         return NULL;
 739
 740                 hid_info(hdev, "Fixing up T100CHI keyb report descriptor\n");
 741                 memmove(rdesc + 392, rdesc + 390, 12);
 742                 rdesc[388] = 0x19;
 743                 rdesc[389] = 0x00;
 744                 rdesc[390] = 0x29;
 745                 rdesc[391] = 0xff;
 746                 rdesc[402] = 0x00;
 747         }
 748         if (drvdata->quirks & QUIRK_G752_KEYBOARD &&
 749                  *rsize == 75 && rdesc[61] == 0x15 && rdesc[62] == 0x00) {
 750                 /* report is missing usage mninum and maximum */
 751                 __u8 *new_rdesc;
 752                 size_t new_size = *rsize + sizeof(asus_g752_fixed_rdesc);
 753
 754                 new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
 755                 if (new_rdesc == NULL)
 756                         return rdesc;
 757
 758                 hid_info(hdev, "Fixing up Asus G752 keyb report descriptor\n");
 759                 /* copy the valid part */
 760                 memcpy(new_rdesc, rdesc, 61);
 761                 /* insert missing part */
 762                 memcpy(new_rdesc + 61, asus_g752_fixed_rdesc, sizeof(asus_g752_fixed_rdesc));
 763                 /* copy remaining data */
 764                 memcpy(new_rdesc + 61 + sizeof(asus_g752_fixed_rdesc), rdesc + 61, *rsize - 61);
 765
 766                 *rsize = new_size;
 767                 rdesc = new_rdesc;
 768         }
 769
 770         return rdesc;
 771 }
 772
 773 static const struct hid_device_id asus_devices[] = {
 774         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 775                 USB_DEVICE_ID_ASUSTEK_I2C_KEYBOARD), I2C_KEYBOARD_QUIRKS},
 776         { HID_I2C_DEVICE(USB_VENDOR_ID_ASUSTEK,
 777                 USB_DEVICE_ID_ASUSTEK_I2C_TOUCHPAD), I2C_TOUCHPAD_QUIRKS },
 778         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 779                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1), QUIRK_USE_KBD_BACKLIGHT },
 780         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 781                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2), QUIRK_USE_KBD_BACKLIGHT },
 782         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 783                 USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD3), QUIRK_G752_KEYBOARD },
 784         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 785                 USB_DEVICE_ID_ASUSTEK_T100TA_KEYBOARD),
 786           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
 787         { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK,
 788                 USB_DEVICE_ID_ASUSTEK_T100TAF_KEYBOARD),
 789           QUIRK_T100_KEYBOARD | QUIRK_NO_CONSUMER_USAGES },
 790         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
 791         { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
 792         { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
 793         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 794                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), QUIRK_T100CHI },
 795
 796         { }
 797 };
 798 MODULE_DEVICE_TABLE(hid, asus_devices);
 799
 800 static struct hid_driver asus_driver = {
 801         .name                   = "asus",
 802         .id_table               = asus_devices,
 803         .report_fixup           = asus_report_fixup,
 804         .probe                  = asus_probe,
 805         .remove                 = asus_remove,
 806         .input_mapping          = asus_input_mapping,
 807         .input_configured       = asus_input_configured,
 808 #ifdef CONFIG_PM
 809         .reset_resume           = asus_reset_resume,
 810 #endif
 811         .raw_event              = asus_raw_event
 812 };
 813 module_hid_driver(asus_driver);
 814
 815 MODULE_LICENSE("GPL");