drivers/hid/hid-magicmouse.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   Apple "Magic" Wireless Mouse driver
   4  *
   5  *   Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
   6  *   Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
   7  */
   8
   9 /*
  10  */
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/device.h>
  15 #include <linux/hid.h>
  16 #include <linux/input/mt.h>
  17 #include <linux/module.h>
  18 #include <linux/slab.h>
  19
  20 #include "hid-ids.h"
  21
  22 static bool emulate_3button = true;
  23 module_param(emulate_3button, bool, 0644);
  24 MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
  25
  26 static int middle_button_start = -350;
  27 static int middle_button_stop = +350;
  28
  29 static bool emulate_scroll_wheel = true;
  30 module_param(emulate_scroll_wheel, bool, 0644);
  31 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
  32
  33 static unsigned int scroll_speed = 32;
  34 static int param_set_scroll_speed(const char *val,
  35                                   const struct kernel_param *kp) {
  36         unsigned long speed;
  37         if (!val || kstrtoul(val, 0, &speed) || speed > 63)
  38                 return -EINVAL;
  39         scroll_speed = speed;
  40         return 0;
  41 }
  42 module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
  43 MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
  44
  45 static bool scroll_acceleration = false;
  46 module_param(scroll_acceleration, bool, 0644);
  47 MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
  48
  49 static bool report_undeciphered;
  50 module_param(report_undeciphered, bool, 0644);
  51 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
  52
  53 #define TRACKPAD_REPORT_ID 0x28
  54 #define TRACKPAD2_USB_REPORT_ID 0x02
  55 #define TRACKPAD2_BT_REPORT_ID 0x31
  56 #define MOUSE_REPORT_ID    0x29
  57 #define DOUBLE_REPORT_ID   0xf7
  58 /* These definitions are not precise, but they're close enough.  (Bits
  59  * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
  60  * to be some kind of bit mask -- 0x20 may be a near-field reading,
  61  * and 0x40 is actual contact, and 0x10 may be a start/stop or change
  62  * indication.)
  63  */
  64 #define TOUCH_STATE_MASK  0xf0
  65 #define TOUCH_STATE_NONE  0x00
  66 #define TOUCH_STATE_START 0x30
  67 #define TOUCH_STATE_DRAG  0x40
  68
  69 #define SCROLL_ACCEL_DEFAULT 7
  70
  71 /* Touch surface information. Dimension is in hundredths of a mm, min and max
  72  * are in units. */
  73 #define MOUSE_DIMENSION_X (float)9056
  74 #define MOUSE_MIN_X -1100
  75 #define MOUSE_MAX_X 1258
  76 #define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
  77 #define MOUSE_DIMENSION_Y (float)5152
  78 #define MOUSE_MIN_Y -1589
  79 #define MOUSE_MAX_Y 2047
  80 #define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
  81
  82 #define TRACKPAD_DIMENSION_X (float)13000
  83 #define TRACKPAD_MIN_X -2909
  84 #define TRACKPAD_MAX_X 3167
  85 #define TRACKPAD_RES_X \
  86         ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
  87 #define TRACKPAD_DIMENSION_Y (float)11000
  88 #define TRACKPAD_MIN_Y -2456
  89 #define TRACKPAD_MAX_Y 2565
  90 #define TRACKPAD_RES_Y \
  91         ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
  92
  93 #define TRACKPAD2_DIMENSION_X (float)16000
  94 #define TRACKPAD2_MIN_X -3678
  95 #define TRACKPAD2_MAX_X 3934
  96 #define TRACKPAD2_RES_X \
  97         ((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100))
  98 #define TRACKPAD2_DIMENSION_Y (float)11490
  99 #define TRACKPAD2_MIN_Y -2478
 100 #define TRACKPAD2_MAX_Y 2587
 101 #define TRACKPAD2_RES_Y \
 102         ((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100))
 103
 104 /**
 105  * struct magicmouse_sc - Tracks Magic Mouse-specific data.
 106  * @input: Input device through which we report events.
 107  * @quirks: Currently unused.
 108  * @ntouches: Number of touches in most recent touch report.
 109  * @scroll_accel: Number of consecutive scroll motions.
 110  * @scroll_jiffies: Time of last scroll motion.
 111  * @touches: Most recent data for a touch, indexed by tracking ID.
 112  * @tracking_ids: Mapping of current touch input data to @touches.
 113  */
 114 struct magicmouse_sc {
 115         struct input_dev *input;
 116         unsigned long quirks;
 117
 118         int ntouches;
 119         int scroll_accel;
 120         unsigned long scroll_jiffies;
 121
 122         struct {
 123                 short x;
 124                 short y;
 125                 short scroll_x;
 126                 short scroll_y;
 127                 u8 size;
 128         } touches[16];
 129         int tracking_ids[16];
 130 };
 131
 132 static int magicmouse_firm_touch(struct magicmouse_sc *msc)
 133 {
 134         int touch = -1;
 135         int ii;
 136
 137         /* If there is only one "firm" touch, set touch to its
 138          * tracking ID.
 139          */
 140         for (ii = 0; ii < msc->ntouches; ii++) {
 141                 int idx = msc->tracking_ids[ii];
 142                 if (msc->touches[idx].size < 8) {
 143                         /* Ignore this touch. */
 144                 } else if (touch >= 0) {
 145                         touch = -1;
 146                         break;
 147                 } else {
 148                         touch = idx;
 149                 }
 150         }
 151
 152         return touch;
 153 }
 154
 155 static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 156 {
 157         int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
 158                 test_bit(BTN_RIGHT, msc->input->key) << 1 |
 159                 test_bit(BTN_MIDDLE, msc->input->key) << 2;
 160
 161         if (emulate_3button) {
 162                 int id;
 163
 164                 /* If some button was pressed before, keep it held
 165                  * down.  Otherwise, if there's exactly one firm
 166                  * touch, use that to override the mouse's guess.
 167                  */
 168                 if (state == 0) {
 169                         /* The button was released. */
 170                 } else if (last_state != 0) {
 171                         state = last_state;
 172                 } else if ((id = magicmouse_firm_touch(msc)) >= 0) {
 173                         int x = msc->touches[id].x;
 174                         if (x < middle_button_start)
 175                                 state = 1;
 176                         else if (x > middle_button_stop)
 177                                 state = 2;
 178                         else
 179                                 state = 4;
 180                 } /* else: we keep the mouse's guess */
 181
 182                 input_report_key(msc->input, BTN_MIDDLE, state & 4);
 183         }
 184
 185         input_report_key(msc->input, BTN_LEFT, state & 1);
 186         input_report_key(msc->input, BTN_RIGHT, state & 2);
 187
 188         if (state != last_state)
 189                 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 190 }
 191
 192 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
 193 {
 194         struct input_dev *input = msc->input;
 195         int id, x, y, size, orientation, touch_major, touch_minor, state, down;
 196         int pressure = 0;
 197
 198         if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 199                 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
 200                 x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
 201                 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
 202                 size = tdata[5] & 0x3f;
 203                 orientation = (tdata[6] >> 2) - 32;
 204                 touch_major = tdata[3];
 205                 touch_minor = tdata[4];
 206                 state = tdata[7] & TOUCH_STATE_MASK;
 207                 down = state != TOUCH_STATE_NONE;
 208         } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 209                 id = tdata[8] & 0xf;
 210                 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
 211                 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
 212                 size = tdata[6];
 213                 orientation = (tdata[8] >> 5) - 4;
 214                 touch_major = tdata[4];
 215                 touch_minor = tdata[5];
 216                 pressure = tdata[7];
 217                 state = tdata[3] & 0xC0;
 218                 down = state == 0x80;
 219         } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 220                 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
 221                 x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
 222                 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
 223                 size = tdata[6] & 0x3f;
 224                 orientation = (tdata[7] >> 2) - 32;
 225                 touch_major = tdata[4];
 226                 touch_minor = tdata[5];
 227                 state = tdata[8] & TOUCH_STATE_MASK;
 228                 down = state != TOUCH_STATE_NONE;
 229         }
 230
 231         /* Store tracking ID and other fields. */
 232         msc->tracking_ids[raw_id] = id;
 233         msc->touches[id].x = x;
 234         msc->touches[id].y = y;
 235         msc->touches[id].size = size;
 236
 237         /* If requested, emulate a scroll wheel by detecting small
 238          * vertical touch motions.
 239          */
 240         if (emulate_scroll_wheel && (input->id.product !=
 241                         USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)) {
 242                 unsigned long now = jiffies;
 243                 int step_x = msc->touches[id].scroll_x - x;
 244                 int step_y = msc->touches[id].scroll_y - y;
 245
 246                 /* Calculate and apply the scroll motion. */
 247                 switch (state) {
 248                 case TOUCH_STATE_START:
 249                         msc->touches[id].scroll_x = x;
 250                         msc->touches[id].scroll_y = y;
 251
 252                         /* Reset acceleration after half a second. */
 253                         if (scroll_acceleration && time_before(now,
 254                                                 msc->scroll_jiffies + HZ / 2))
 255                                 msc->scroll_accel = max_t(int,
 256                                                 msc->scroll_accel - 1, 1);
 257                         else
 258                                 msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 259
 260                         break;
 261                 case TOUCH_STATE_DRAG:
 262                         step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
 263                         if (step_x != 0) {
 264                                 msc->touches[id].scroll_x -= step_x *
 265                                         (64 - scroll_speed) * msc->scroll_accel;
 266                                 msc->scroll_jiffies = now;
 267                                 input_report_rel(input, REL_HWHEEL, -step_x);
 268                         }
 269
 270                         step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
 271                         if (step_y != 0) {
 272                                 msc->touches[id].scroll_y -= step_y *
 273                                         (64 - scroll_speed) * msc->scroll_accel;
 274                                 msc->scroll_jiffies = now;
 275                                 input_report_rel(input, REL_WHEEL, step_y);
 276                         }
 277                         break;
 278                 }
 279         }
 280
 281         if (down)
 282                 msc->ntouches++;
 283
 284         input_mt_slot(input, id);
 285         input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
 286
 287         /* Generate the input events for this touch. */
 288         if (down) {
 289                 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
 290                 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
 291                 input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
 292                 input_report_abs(input, ABS_MT_POSITION_X, x);
 293                 input_report_abs(input, ABS_MT_POSITION_Y, y);
 294
 295                 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
 296                         input_report_abs(input, ABS_MT_PRESSURE, pressure);
 297
 298                 if (report_undeciphered) {
 299                         if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
 300                                 input_event(input, EV_MSC, MSC_RAW, tdata[7]);
 301                         else if (input->id.product !=
 302                                         USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)
 303                                 input_event(input, EV_MSC, MSC_RAW, tdata[8]);
 304                 }
 305         }
 306 }
 307
 308 static int magicmouse_raw_event(struct hid_device *hdev,
 309                 struct hid_report *report, u8 *data, int size)
 310 {
 311         struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 312         struct input_dev *input = msc->input;
 313         int x = 0, y = 0, ii, clicks = 0, npoints;
 314
 315         switch (data[0]) {
 316         case TRACKPAD_REPORT_ID:
 317         case TRACKPAD2_BT_REPORT_ID:
 318                 /* Expect four bytes of prefix, and N*9 bytes of touch data. */
 319                 if (size < 4 || ((size - 4) % 9) != 0)
 320                         return 0;
 321                 npoints = (size - 4) / 9;
 322                 if (npoints > 15) {
 323                         hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
 324                                         size);
 325                         return 0;
 326                 }
 327                 msc->ntouches = 0;
 328                 for (ii = 0; ii < npoints; ii++)
 329                         magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
 330
 331                 clicks = data[1];
 332
 333                 /* The following bits provide a device specific timestamp. They
 334                  * are unused here.
 335                  *
 336                  * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
 337                  */
 338                 break;
 339         case TRACKPAD2_USB_REPORT_ID:
 340                 /* Expect twelve bytes of prefix and N*9 bytes of touch data. */
 341                 if (size < 12 || ((size - 12) % 9) != 0)
 342                         return 0;
 343                 npoints = (size - 12) / 9;
 344                 if (npoints > 15) {
 345                         hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n",
 346                                         size);
 347                         return 0;
 348                 }
 349                 msc->ntouches = 0;
 350                 for (ii = 0; ii < npoints; ii++)
 351                         magicmouse_emit_touch(msc, ii, data + ii * 9 + 12);
 352
 353                 clicks = data[1];
 354                 break;
 355         case MOUSE_REPORT_ID:
 356                 /* Expect six bytes of prefix, and N*8 bytes of touch data. */
 357                 if (size < 6 || ((size - 6) % 8) != 0)
 358                         return 0;
 359                 npoints = (size - 6) / 8;
 360                 if (npoints > 15) {
 361                         hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
 362                                         size);
 363                         return 0;
 364                 }
 365                 msc->ntouches = 0;
 366                 for (ii = 0; ii < npoints; ii++)
 367                         magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
 368
 369                 /* When emulating three-button mode, it is important
 370                  * to have the current touch information before
 371                  * generating a click event.
 372                  */
 373                 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
 374                 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
 375                 clicks = data[3];
 376
 377                 /* The following bits provide a device specific timestamp. They
 378                  * are unused here.
 379                  *
 380                  * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
 381                  */
 382                 break;
 383         case DOUBLE_REPORT_ID:
 384                 /* Sometimes the trackpad sends two touch reports in one
 385                  * packet.
 386                  */
 387                 magicmouse_raw_event(hdev, report, data + 2, data[1]);
 388                 magicmouse_raw_event(hdev, report, data + 2 + data[1],
 389                         size - 2 - data[1]);
 390                 break;
 391         default:
 392                 return 0;
 393         }
 394
 395         if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 396                 magicmouse_emit_buttons(msc, clicks & 3);
 397                 input_report_rel(input, REL_X, x);
 398                 input_report_rel(input, REL_Y, y);
 399         } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 400                 input_mt_sync_frame(input);
 401                 input_report_key(input, BTN_MOUSE, clicks & 1);
 402         } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 403                 input_report_key(input, BTN_MOUSE, clicks & 1);
 404                 input_mt_report_pointer_emulation(input, true);
 405         }
 406
 407         input_sync(input);
 408         return 1;
 409 }
 410
 411 static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
 412 {
 413         int error;
 414         int mt_flags = 0;
 415
 416         __set_bit(EV_KEY, input->evbit);
 417
 418         if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 419                 __set_bit(BTN_LEFT, input->keybit);
 420                 __set_bit(BTN_RIGHT, input->keybit);
 421                 if (emulate_3button)
 422                         __set_bit(BTN_MIDDLE, input->keybit);
 423
 424                 __set_bit(EV_REL, input->evbit);
 425                 __set_bit(REL_X, input->relbit);
 426                 __set_bit(REL_Y, input->relbit);
 427                 if (emulate_scroll_wheel) {
 428                         __set_bit(REL_WHEEL, input->relbit);
 429                         __set_bit(REL_HWHEEL, input->relbit);
 430                 }
 431         } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 432                 /* setting the device name to ensure the same driver settings
 433                  * get loaded, whether connected through bluetooth or USB
 434                  */
 435                 input->name = "Apple Inc. Magic Trackpad 2";
 436
 437                 __clear_bit(EV_MSC, input->evbit);
 438                 __clear_bit(BTN_0, input->keybit);
 439                 __clear_bit(BTN_RIGHT, input->keybit);
 440                 __clear_bit(BTN_MIDDLE, input->keybit);
 441                 __set_bit(BTN_MOUSE, input->keybit);
 442                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 443                 __set_bit(BTN_TOOL_FINGER, input->keybit);
 444
 445                 mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
 446                                 INPUT_MT_TRACK;
 447         } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 448                 /* input->keybit is initialized with incorrect button info
 449                  * for Magic Trackpad. There really is only one physical
 450                  * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
 451                  * advertise buttons that don't exist...
 452                  */
 453                 __clear_bit(BTN_RIGHT, input->keybit);
 454                 __clear_bit(BTN_MIDDLE, input->keybit);
 455                 __set_bit(BTN_MOUSE, input->keybit);
 456                 __set_bit(BTN_TOOL_FINGER, input->keybit);
 457                 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
 458                 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
 459                 __set_bit(BTN_TOOL_QUADTAP, input->keybit);
 460                 __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
 461                 __set_bit(BTN_TOUCH, input->keybit);
 462                 __set_bit(INPUT_PROP_POINTER, input->propbit);
 463                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 464         }
 465
 466
 467         __set_bit(EV_ABS, input->evbit);
 468
 469         error = input_mt_init_slots(input, 16, mt_flags);
 470         if (error)
 471                 return error;
 472         input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
 473                              4, 0);
 474         input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
 475                              4, 0);
 476
 477         /* Note: Touch Y position from the device is inverted relative
 478          * to how pointer motion is reported (and relative to how USB
 479          * HID recommends the coordinates work).  This driver keeps
 480          * the origin at the same position, and just uses the additive
 481          * inverse of the reported Y.
 482          */
 483         if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 484                 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
 485                 input_set_abs_params(input, ABS_MT_POSITION_X,
 486                                      MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
 487                 input_set_abs_params(input, ABS_MT_POSITION_Y,
 488                                      MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
 489
 490                 input_abs_set_res(input, ABS_MT_POSITION_X,
 491                                   MOUSE_RES_X);
 492                 input_abs_set_res(input, ABS_MT_POSITION_Y,
 493                                   MOUSE_RES_Y);
 494         } else if (input->id.product ==  USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 495                 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0);
 496                 input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0);
 497                 input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0);
 498                 input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X,
 499                                      TRACKPAD2_MAX_X, 0, 0);
 500                 input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y,
 501                                      TRACKPAD2_MAX_Y, 0, 0);
 502                 input_set_abs_params(input, ABS_MT_POSITION_X,
 503                                      TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0);
 504                 input_set_abs_params(input, ABS_MT_POSITION_Y,
 505                                      TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0);
 506
 507                 input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X);
 508                 input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y);
 509                 input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X);
 510                 input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y);
 511         } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 512                 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
 513                 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
 514                                      TRACKPAD_MAX_X, 4, 0);
 515                 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
 516                                      TRACKPAD_MAX_Y, 4, 0);
 517                 input_set_abs_params(input, ABS_MT_POSITION_X,
 518                                      TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
 519                 input_set_abs_params(input, ABS_MT_POSITION_Y,
 520                                      TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
 521
 522                 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
 523                 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
 524                 input_abs_set_res(input, ABS_MT_POSITION_X,
 525                                   TRACKPAD_RES_X);
 526                 input_abs_set_res(input, ABS_MT_POSITION_Y,
 527                                   TRACKPAD_RES_Y);
 528         }
 529
 530         input_set_events_per_packet(input, 60);
 531
 532         if (report_undeciphered &&
 533             input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 534                 __set_bit(EV_MSC, input->evbit);
 535                 __set_bit(MSC_RAW, input->mscbit);
 536         }
 537
 538         return 0;
 539 }
 540
 541 static int magicmouse_input_mapping(struct hid_device *hdev,
 542                 struct hid_input *hi, struct hid_field *field,
 543                 struct hid_usage *usage, unsigned long **bit, int *max)
 544 {
 545         struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 546
 547         if (!msc->input)
 548                 msc->input = hi->input;
 549
 550         /* Magic Trackpad does not give relative data after switching to MT */
 551         if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD ||
 552              hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) &&
 553             field->flags & HID_MAIN_ITEM_RELATIVE)
 554                 return -1;
 555
 556         return 0;
 557 }
 558
 559 static int magicmouse_input_configured(struct hid_device *hdev,
 560                 struct hid_input *hi)
 561
 562 {
 563         struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 564         int ret;
 565
 566         ret = magicmouse_setup_input(msc->input, hdev);
 567         if (ret) {
 568                 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
 569                 /* clean msc->input to notify probe() of the failure */
 570                 msc->input = NULL;
 571                 return ret;
 572         }
 573
 574         return 0;
 575 }
 576
 577
 578 static int magicmouse_probe(struct hid_device *hdev,
 579         const struct hid_device_id *id)
 580 {
 581         const u8 *feature;
 582         const u8 feature_mt[] = { 0xD7, 0x01 };
 583         const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 };
 584         const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 };
 585         u8 *buf;
 586         struct magicmouse_sc *msc;
 587         struct hid_report *report;
 588         int ret;
 589         int feature_size;
 590
 591         if (id->vendor == USB_VENDOR_ID_APPLE &&
 592             id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 &&
 593             hdev->type != HID_TYPE_USBMOUSE)
 594                 return 0;
 595
 596         msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL);
 597         if (msc == NULL) {
 598                 hid_err(hdev, "can't alloc magicmouse descriptor\n");
 599                 return -ENOMEM;
 600         }
 601
 602         msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 603
 604         msc->quirks = id->driver_data;
 605         hid_set_drvdata(hdev, msc);
 606
 607         ret = hid_parse(hdev);
 608         if (ret) {
 609                 hid_err(hdev, "magicmouse hid parse failed\n");
 610                 return ret;
 611         }
 612
 613         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 614         if (ret) {
 615                 hid_err(hdev, "magicmouse hw start failed\n");
 616                 return ret;
 617         }
 618
 619         if (!msc->input) {
 620                 hid_err(hdev, "magicmouse input not registered\n");
 621                 ret = -ENOMEM;
 622                 goto err_stop_hw;
 623         }
 624
 625         if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
 626                 report = hid_register_report(hdev, HID_INPUT_REPORT,
 627                         MOUSE_REPORT_ID, 0);
 628         else if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 629                 if (id->vendor == BT_VENDOR_ID_APPLE)
 630                         report = hid_register_report(hdev, HID_INPUT_REPORT,
 631                                 TRACKPAD2_BT_REPORT_ID, 0);
 632                 else /* USB_VENDOR_ID_APPLE */
 633                         report = hid_register_report(hdev, HID_INPUT_REPORT,
 634                                 TRACKPAD2_USB_REPORT_ID, 0);
 635         } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 636                 report = hid_register_report(hdev, HID_INPUT_REPORT,
 637                         TRACKPAD_REPORT_ID, 0);
 638                 report = hid_register_report(hdev, HID_INPUT_REPORT,
 639                         DOUBLE_REPORT_ID, 0);
 640         }
 641
 642         if (!report) {
 643                 hid_err(hdev, "unable to register touch report\n");
 644                 ret = -ENOMEM;
 645                 goto err_stop_hw;
 646         }
 647         report->size = 6;
 648
 649         if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) {
 650                 if (id->vendor == BT_VENDOR_ID_APPLE) {
 651                         feature_size = sizeof(feature_mt_trackpad2_bt);
 652                         feature = feature_mt_trackpad2_bt;
 653                 } else { /* USB_VENDOR_ID_APPLE */
 654                         feature_size = sizeof(feature_mt_trackpad2_usb);
 655                         feature = feature_mt_trackpad2_usb;
 656                 }
 657         } else {
 658                 feature_size = sizeof(feature_mt);
 659                 feature = feature_mt;
 660         }
 661
 662         buf = kmemdup(feature, feature_size, GFP_KERNEL);
 663         if (!buf) {
 664                 ret = -ENOMEM;
 665                 goto err_stop_hw;
 666         }
 667
 668         /*
 669          * Some devices repond with 'invalid report id' when feature
 670          * report switching it into multitouch mode is sent to it.
 671          *
 672          * This results in -EIO from the _raw low-level transport callback,
 673          * but there seems to be no other way of switching the mode.
 674          * Thus the super-ugly hacky success check below.
 675          */
 676         ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size,
 677                                 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
 678         kfree(buf);
 679         if (ret != -EIO && ret != feature_size) {
 680                 hid_err(hdev, "unable to request touch data (%d)\n", ret);
 681                 goto err_stop_hw;
 682         }
 683
 684         return 0;
 685 err_stop_hw:
 686         hid_hw_stop(hdev);
 687         return ret;
 688 }
 689
 690 static const struct hid_device_id magic_mice[] = {
 691         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 692                 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
 693         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 694                 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
 695         { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE,
 696                 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
 697         { HID_USB_DEVICE(USB_VENDOR_ID_APPLE,
 698                 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 },
 699         { }
 700 };
 701 MODULE_DEVICE_TABLE(hid, magic_mice);
 702
 703 static struct hid_driver magicmouse_driver = {
 704         .name = "magicmouse",
 705         .id_table = magic_mice,
 706         .probe = magicmouse_probe,
 707         .raw_event = magicmouse_raw_event,
 708         .input_mapping = magicmouse_input_mapping,
 709         .input_configured = magicmouse_input_configured,
 710 };
 711 module_hid_driver(magicmouse_driver);
 712
 713 MODULE_LICENSE("GPL");