linux/drivers/hid/hid-magicmouse.c
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   1/*
   2 *   Apple "Magic" Wireless Mouse driver
   3 *
   4 *   Copyright (c) 2010 Michael Poole <mdpoole@troilus.org>
   5 *   Copyright (c) 2010 Chase Douglas <chase.douglas@canonical.com>
   6 */
   7
   8/*
   9 * This program is free software; you can redistribute it and/or modify it
  10 * under the terms of the GNU General Public License as published by the Free
  11 * Software Foundation; either version 2 of the License, or (at your option)
  12 * any later version.
  13 */
  14
  15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17#include <linux/device.h>
  18#include <linux/hid.h>
  19#include <linux/input/mt.h>
  20#include <linux/module.h>
  21#include <linux/slab.h>
  22#include <linux/usb.h>
  23
  24#include "hid-ids.h"
  25
  26static bool emulate_3button = true;
  27module_param(emulate_3button, bool, 0644);
  28MODULE_PARM_DESC(emulate_3button, "Emulate a middle button");
  29
  30static int middle_button_start = -350;
  31static int middle_button_stop = +350;
  32
  33static bool emulate_scroll_wheel = true;
  34module_param(emulate_scroll_wheel, bool, 0644);
  35MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel");
  36
  37static unsigned int scroll_speed = 32;
  38static int param_set_scroll_speed(const char *val, struct kernel_param *kp) {
  39        unsigned long speed;
  40        if (!val || strict_strtoul(val, 0, &speed) || speed > 63)
  41                return -EINVAL;
  42        scroll_speed = speed;
  43        return 0;
  44}
  45module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644);
  46MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)");
  47
  48static bool scroll_acceleration = false;
  49module_param(scroll_acceleration, bool, 0644);
  50MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events");
  51
  52static bool report_undeciphered;
  53module_param(report_undeciphered, bool, 0644);
  54MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event");
  55
  56#define TRACKPAD_REPORT_ID 0x28
  57#define MOUSE_REPORT_ID    0x29
  58#define DOUBLE_REPORT_ID   0xf7
  59/* These definitions are not precise, but they're close enough.  (Bits
  60 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem
  61 * to be some kind of bit mask -- 0x20 may be a near-field reading,
  62 * and 0x40 is actual contact, and 0x10 may be a start/stop or change
  63 * indication.)
  64 */
  65#define TOUCH_STATE_MASK  0xf0
  66#define TOUCH_STATE_NONE  0x00
  67#define TOUCH_STATE_START 0x30
  68#define TOUCH_STATE_DRAG  0x40
  69
  70#define SCROLL_ACCEL_DEFAULT 7
  71
  72/* Touch surface information. Dimension is in hundredths of a mm, min and max
  73 * are in units. */
  74#define MOUSE_DIMENSION_X (float)9056
  75#define MOUSE_MIN_X -1100
  76#define MOUSE_MAX_X 1258
  77#define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100))
  78#define MOUSE_DIMENSION_Y (float)5152
  79#define MOUSE_MIN_Y -1589
  80#define MOUSE_MAX_Y 2047
  81#define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100))
  82
  83#define TRACKPAD_DIMENSION_X (float)13000
  84#define TRACKPAD_MIN_X -2909
  85#define TRACKPAD_MAX_X 3167
  86#define TRACKPAD_RES_X \
  87        ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100))
  88#define TRACKPAD_DIMENSION_Y (float)11000
  89#define TRACKPAD_MIN_Y -2456
  90#define TRACKPAD_MAX_Y 2565
  91#define TRACKPAD_RES_Y \
  92        ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100))
  93
  94/**
  95 * struct magicmouse_sc - Tracks Magic Mouse-specific data.
  96 * @input: Input device through which we report events.
  97 * @quirks: Currently unused.
  98 * @ntouches: Number of touches in most recent touch report.
  99 * @scroll_accel: Number of consecutive scroll motions.
 100 * @scroll_jiffies: Time of last scroll motion.
 101 * @touches: Most recent data for a touch, indexed by tracking ID.
 102 * @tracking_ids: Mapping of current touch input data to @touches.
 103 */
 104struct magicmouse_sc {
 105        struct input_dev *input;
 106        unsigned long quirks;
 107
 108        int ntouches;
 109        int scroll_accel;
 110        unsigned long scroll_jiffies;
 111
 112        struct {
 113                short x;
 114                short y;
 115                short scroll_x;
 116                short scroll_y;
 117                u8 size;
 118        } touches[16];
 119        int tracking_ids[16];
 120};
 121
 122static int magicmouse_firm_touch(struct magicmouse_sc *msc)
 123{
 124        int touch = -1;
 125        int ii;
 126
 127        /* If there is only one "firm" touch, set touch to its
 128         * tracking ID.
 129         */
 130        for (ii = 0; ii < msc->ntouches; ii++) {
 131                int idx = msc->tracking_ids[ii];
 132                if (msc->touches[idx].size < 8) {
 133                        /* Ignore this touch. */
 134                } else if (touch >= 0) {
 135                        touch = -1;
 136                        break;
 137                } else {
 138                        touch = idx;
 139                }
 140        }
 141
 142        return touch;
 143}
 144
 145static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state)
 146{
 147        int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 |
 148                test_bit(BTN_RIGHT, msc->input->key) << 1 |
 149                test_bit(BTN_MIDDLE, msc->input->key) << 2;
 150
 151        if (emulate_3button) {
 152                int id;
 153
 154                /* If some button was pressed before, keep it held
 155                 * down.  Otherwise, if there's exactly one firm
 156                 * touch, use that to override the mouse's guess.
 157                 */
 158                if (state == 0) {
 159                        /* The button was released. */
 160                } else if (last_state != 0) {
 161                        state = last_state;
 162                } else if ((id = magicmouse_firm_touch(msc)) >= 0) {
 163                        int x = msc->touches[id].x;
 164                        if (x < middle_button_start)
 165                                state = 1;
 166                        else if (x > middle_button_stop)
 167                                state = 2;
 168                        else
 169                                state = 4;
 170                } /* else: we keep the mouse's guess */
 171
 172                input_report_key(msc->input, BTN_MIDDLE, state & 4);
 173        }
 174
 175        input_report_key(msc->input, BTN_LEFT, state & 1);
 176        input_report_key(msc->input, BTN_RIGHT, state & 2);
 177
 178        if (state != last_state)
 179                msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 180}
 181
 182static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata)
 183{
 184        struct input_dev *input = msc->input;
 185        int id, x, y, size, orientation, touch_major, touch_minor, state, down;
 186
 187        if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 188                id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf;
 189                x = (tdata[1] << 28 | tdata[0] << 20) >> 20;
 190                y = -((tdata[2] << 24 | tdata[1] << 16) >> 20);
 191                size = tdata[5] & 0x3f;
 192                orientation = (tdata[6] >> 2) - 32;
 193                touch_major = tdata[3];
 194                touch_minor = tdata[4];
 195                state = tdata[7] & TOUCH_STATE_MASK;
 196                down = state != TOUCH_STATE_NONE;
 197        } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 198                id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf;
 199                x = (tdata[1] << 27 | tdata[0] << 19) >> 19;
 200                y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19);
 201                size = tdata[6] & 0x3f;
 202                orientation = (tdata[7] >> 2) - 32;
 203                touch_major = tdata[4];
 204                touch_minor = tdata[5];
 205                state = tdata[8] & TOUCH_STATE_MASK;
 206                down = state != TOUCH_STATE_NONE;
 207        }
 208
 209        /* Store tracking ID and other fields. */
 210        msc->tracking_ids[raw_id] = id;
 211        msc->touches[id].x = x;
 212        msc->touches[id].y = y;
 213        msc->touches[id].size = size;
 214
 215        /* If requested, emulate a scroll wheel by detecting small
 216         * vertical touch motions.
 217         */
 218        if (emulate_scroll_wheel) {
 219                unsigned long now = jiffies;
 220                int step_x = msc->touches[id].scroll_x - x;
 221                int step_y = msc->touches[id].scroll_y - y;
 222
 223                /* Calculate and apply the scroll motion. */
 224                switch (state) {
 225                case TOUCH_STATE_START:
 226                        msc->touches[id].scroll_x = x;
 227                        msc->touches[id].scroll_y = y;
 228
 229                        /* Reset acceleration after half a second. */
 230                        if (scroll_acceleration && time_before(now,
 231                                                msc->scroll_jiffies + HZ / 2))
 232                                msc->scroll_accel = max_t(int,
 233                                                msc->scroll_accel - 1, 1);
 234                        else
 235                                msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 236
 237                        break;
 238                case TOUCH_STATE_DRAG:
 239                        step_x /= (64 - (int)scroll_speed) * msc->scroll_accel;
 240                        if (step_x != 0) {
 241                                msc->touches[id].scroll_x -= step_x *
 242                                        (64 - scroll_speed) * msc->scroll_accel;
 243                                msc->scroll_jiffies = now;
 244                                input_report_rel(input, REL_HWHEEL, -step_x);
 245                        }
 246
 247                        step_y /= (64 - (int)scroll_speed) * msc->scroll_accel;
 248                        if (step_y != 0) {
 249                                msc->touches[id].scroll_y -= step_y *
 250                                        (64 - scroll_speed) * msc->scroll_accel;
 251                                msc->scroll_jiffies = now;
 252                                input_report_rel(input, REL_WHEEL, step_y);
 253                        }
 254                        break;
 255                }
 256        }
 257
 258        if (down)
 259                msc->ntouches++;
 260
 261        input_mt_slot(input, id);
 262        input_mt_report_slot_state(input, MT_TOOL_FINGER, down);
 263
 264        /* Generate the input events for this touch. */
 265        if (down) {
 266                input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
 267                input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
 268                input_report_abs(input, ABS_MT_ORIENTATION, -orientation);
 269                input_report_abs(input, ABS_MT_POSITION_X, x);
 270                input_report_abs(input, ABS_MT_POSITION_Y, y);
 271
 272                if (report_undeciphered) {
 273                        if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
 274                                input_event(input, EV_MSC, MSC_RAW, tdata[7]);
 275                        else /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 276                                input_event(input, EV_MSC, MSC_RAW, tdata[8]);
 277                }
 278        }
 279}
 280
 281static int magicmouse_raw_event(struct hid_device *hdev,
 282                struct hid_report *report, u8 *data, int size)
 283{
 284        struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 285        struct input_dev *input = msc->input;
 286        int x = 0, y = 0, ii, clicks = 0, npoints;
 287
 288        switch (data[0]) {
 289        case TRACKPAD_REPORT_ID:
 290                /* Expect four bytes of prefix, and N*9 bytes of touch data. */
 291                if (size < 4 || ((size - 4) % 9) != 0)
 292                        return 0;
 293                npoints = (size - 4) / 9;
 294                msc->ntouches = 0;
 295                for (ii = 0; ii < npoints; ii++)
 296                        magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
 297
 298                clicks = data[1];
 299
 300                /* The following bits provide a device specific timestamp. They
 301                 * are unused here.
 302                 *
 303                 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10;
 304                 */
 305                break;
 306        case MOUSE_REPORT_ID:
 307                /* Expect six bytes of prefix, and N*8 bytes of touch data. */
 308                if (size < 6 || ((size - 6) % 8) != 0)
 309                        return 0;
 310                npoints = (size - 6) / 8;
 311                msc->ntouches = 0;
 312                for (ii = 0; ii < npoints; ii++)
 313                        magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
 314
 315                /* When emulating three-button mode, it is important
 316                 * to have the current touch information before
 317                 * generating a click event.
 318                 */
 319                x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22;
 320                y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22;
 321                clicks = data[3];
 322
 323                /* The following bits provide a device specific timestamp. They
 324                 * are unused here.
 325                 *
 326                 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;
 327                 */
 328                break;
 329        case DOUBLE_REPORT_ID:
 330                /* Sometimes the trackpad sends two touch reports in one
 331                 * packet.
 332                 */
 333                magicmouse_raw_event(hdev, report, data + 2, data[1]);
 334                magicmouse_raw_event(hdev, report, data + 2 + data[1],
 335                        size - 2 - data[1]);
 336                break;
 337        default:
 338                return 0;
 339        }
 340
 341        if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 342                magicmouse_emit_buttons(msc, clicks & 3);
 343                input_report_rel(input, REL_X, x);
 344                input_report_rel(input, REL_Y, y);
 345        } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 346                input_report_key(input, BTN_MOUSE, clicks & 1);
 347                input_mt_report_pointer_emulation(input, true);
 348        }
 349
 350        input_sync(input);
 351        return 1;
 352}
 353
 354static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev)
 355{
 356        int error;
 357
 358        __set_bit(EV_KEY, input->evbit);
 359
 360        if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 361                __set_bit(BTN_LEFT, input->keybit);
 362                __set_bit(BTN_RIGHT, input->keybit);
 363                if (emulate_3button)
 364                        __set_bit(BTN_MIDDLE, input->keybit);
 365
 366                __set_bit(EV_REL, input->evbit);
 367                __set_bit(REL_X, input->relbit);
 368                __set_bit(REL_Y, input->relbit);
 369                if (emulate_scroll_wheel) {
 370                        __set_bit(REL_WHEEL, input->relbit);
 371                        __set_bit(REL_HWHEEL, input->relbit);
 372                }
 373        } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 374                /* input->keybit is initialized with incorrect button info
 375                 * for Magic Trackpad. There really is only one physical
 376                 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't
 377                 * advertise buttons that don't exist...
 378                 */
 379                __clear_bit(BTN_RIGHT, input->keybit);
 380                __clear_bit(BTN_MIDDLE, input->keybit);
 381                __set_bit(BTN_MOUSE, input->keybit);
 382                __set_bit(BTN_TOOL_FINGER, input->keybit);
 383                __set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
 384                __set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
 385                __set_bit(BTN_TOOL_QUADTAP, input->keybit);
 386                __set_bit(BTN_TOOL_QUINTTAP, input->keybit);
 387                __set_bit(BTN_TOUCH, input->keybit);
 388                __set_bit(INPUT_PROP_POINTER, input->propbit);
 389                __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 390        }
 391
 392
 393        __set_bit(EV_ABS, input->evbit);
 394
 395        error = input_mt_init_slots(input, 16);
 396        if (error)
 397                return error;
 398        input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2,
 399                             4, 0);
 400        input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2,
 401                             4, 0);
 402        input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0);
 403
 404        /* Note: Touch Y position from the device is inverted relative
 405         * to how pointer motion is reported (and relative to how USB
 406         * HID recommends the coordinates work).  This driver keeps
 407         * the origin at the same position, and just uses the additive
 408         * inverse of the reported Y.
 409         */
 410        if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
 411                input_set_abs_params(input, ABS_MT_POSITION_X,
 412                                     MOUSE_MIN_X, MOUSE_MAX_X, 4, 0);
 413                input_set_abs_params(input, ABS_MT_POSITION_Y,
 414                                     MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0);
 415
 416                input_abs_set_res(input, ABS_MT_POSITION_X,
 417                                  MOUSE_RES_X);
 418                input_abs_set_res(input, ABS_MT_POSITION_Y,
 419                                  MOUSE_RES_Y);
 420        } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 421                input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X,
 422                                     TRACKPAD_MAX_X, 4, 0);
 423                input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y,
 424                                     TRACKPAD_MAX_Y, 4, 0);
 425                input_set_abs_params(input, ABS_MT_POSITION_X,
 426                                     TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0);
 427                input_set_abs_params(input, ABS_MT_POSITION_Y,
 428                                     TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0);
 429
 430                input_abs_set_res(input, ABS_X, TRACKPAD_RES_X);
 431                input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y);
 432                input_abs_set_res(input, ABS_MT_POSITION_X,
 433                                  TRACKPAD_RES_X);
 434                input_abs_set_res(input, ABS_MT_POSITION_Y,
 435                                  TRACKPAD_RES_Y);
 436        }
 437
 438        input_set_events_per_packet(input, 60);
 439
 440        if (report_undeciphered) {
 441                __set_bit(EV_MSC, input->evbit);
 442                __set_bit(MSC_RAW, input->mscbit);
 443        }
 444
 445        return 0;
 446}
 447
 448static int magicmouse_input_mapping(struct hid_device *hdev,
 449                struct hid_input *hi, struct hid_field *field,
 450                struct hid_usage *usage, unsigned long **bit, int *max)
 451{
 452        struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 453
 454        if (!msc->input)
 455                msc->input = hi->input;
 456
 457        /* Magic Trackpad does not give relative data after switching to MT */
 458        if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD &&
 459            field->flags & HID_MAIN_ITEM_RELATIVE)
 460                return -1;
 461
 462        return 0;
 463}
 464
 465static int magicmouse_probe(struct hid_device *hdev,
 466        const struct hid_device_id *id)
 467{
 468        __u8 feature[] = { 0xd7, 0x01 };
 469        struct magicmouse_sc *msc;
 470        struct hid_report *report;
 471        int ret;
 472
 473        msc = kzalloc(sizeof(*msc), GFP_KERNEL);
 474        if (msc == NULL) {
 475                hid_err(hdev, "can't alloc magicmouse descriptor\n");
 476                return -ENOMEM;
 477        }
 478
 479        msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
 480
 481        msc->quirks = id->driver_data;
 482        hid_set_drvdata(hdev, msc);
 483
 484        ret = hid_parse(hdev);
 485        if (ret) {
 486                hid_err(hdev, "magicmouse hid parse failed\n");
 487                goto err_free;
 488        }
 489
 490        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 491        if (ret) {
 492                hid_err(hdev, "magicmouse hw start failed\n");
 493                goto err_free;
 494        }
 495
 496        /* We do this after hid-input is done parsing reports so that
 497         * hid-input uses the most natural button and axis IDs.
 498         */
 499        if (msc->input) {
 500                ret = magicmouse_setup_input(msc->input, hdev);
 501                if (ret) {
 502                        hid_err(hdev, "magicmouse setup input failed (%d)\n", ret);
 503                        goto err_stop_hw;
 504                }
 505        }
 506
 507        if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE)
 508                report = hid_register_report(hdev, HID_INPUT_REPORT,
 509                        MOUSE_REPORT_ID);
 510        else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
 511                report = hid_register_report(hdev, HID_INPUT_REPORT,
 512                        TRACKPAD_REPORT_ID);
 513                report = hid_register_report(hdev, HID_INPUT_REPORT,
 514                        DOUBLE_REPORT_ID);
 515        }
 516
 517        if (!report) {
 518                hid_err(hdev, "unable to register touch report\n");
 519                ret = -ENOMEM;
 520                goto err_stop_hw;
 521        }
 522        report->size = 6;
 523
 524        /*
 525         * Some devices repond with 'invalid report id' when feature
 526         * report switching it into multitouch mode is sent to it.
 527         *
 528         * This results in -EIO from the _raw low-level transport callback,
 529         * but there seems to be no other way of switching the mode.
 530         * Thus the super-ugly hacky success check below.
 531         */
 532        ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature),
 533                        HID_FEATURE_REPORT);
 534        if (ret != -EIO && ret != sizeof(feature)) {
 535                hid_err(hdev, "unable to request touch data (%d)\n", ret);
 536                goto err_stop_hw;
 537        }
 538
 539        return 0;
 540err_stop_hw:
 541        hid_hw_stop(hdev);
 542err_free:
 543        kfree(msc);
 544        return ret;
 545}
 546
 547static void magicmouse_remove(struct hid_device *hdev)
 548{
 549        struct magicmouse_sc *msc = hid_get_drvdata(hdev);
 550
 551        hid_hw_stop(hdev);
 552        kfree(msc);
 553}
 554
 555static const struct hid_device_id magic_mice[] = {
 556        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 557                USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 },
 558        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 559                USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 },
 560        { }
 561};
 562MODULE_DEVICE_TABLE(hid, magic_mice);
 563
 564static struct hid_driver magicmouse_driver = {
 565        .name = "magicmouse",
 566        .id_table = magic_mice,
 567        .probe = magicmouse_probe,
 568        .remove = magicmouse_remove,
 569        .raw_event = magicmouse_raw_event,
 570        .input_mapping = magicmouse_input_mapping,
 571};
 572
 573static int __init magicmouse_init(void)
 574{
 575        int ret;
 576
 577        ret = hid_register_driver(&magicmouse_driver);
 578        if (ret)
 579                pr_err("can't register magicmouse driver\n");
 580
 581        return ret;
 582}
 583
 584static void __exit magicmouse_exit(void)
 585{
 586        hid_unregister_driver(&magicmouse_driver);
 587}
 588
 589module_init(magicmouse_init);
 590module_exit(magicmouse_exit);
 591MODULE_LICENSE("GPL");
 592
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