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/module.h> 20 #include <linux/slab.h> 21 #include <linux/usb.h> 22 23 #include "hid-ids.h" 24 25 static bool emulate_3button = true; 26 module_param(emulate_3button, bool, 0644); 27 MODULE_PARM_DESC(emulate_3button, "Emulate a middle button"); 28 29 static int middle_button_start = -350; 30 static int middle_button_stop = +350; 31 32 static bool emulate_scroll_wheel = true; 33 module_param(emulate_scroll_wheel, bool, 0644); 34 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel"); 35 36 static unsigned int scroll_speed = 32; 37 static int param_set_scroll_speed(const char *val, struct kernel_param *kp) { 38 unsigned long speed; 39 if (!val || strict_strtoul(val, 0, &speed) || speed > 63) 40 return -EINVAL; 41 scroll_speed = speed; 42 return 0; 43 } 44 module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644); 45 MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)"); 46 47 static bool scroll_acceleration = false; 48 module_param(scroll_acceleration, bool, 0644); 49 MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events"); 50 51 static bool report_touches = true; 52 module_param(report_touches, bool, 0644); 53 MODULE_PARM_DESC(report_touches, "Emit touch records (otherwise, only use them for emulation)"); 54 55 static bool report_undeciphered; 56 module_param(report_undeciphered, bool, 0644); 57 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event"); 58 59 #define TRACKPAD_REPORT_ID 0x28 60 #define MOUSE_REPORT_ID 0x29 61 #define DOUBLE_REPORT_ID 0xf7 62 /* These definitions are not precise, but they're close enough. (Bits 63 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem 64 * to be some kind of bit mask -- 0x20 may be a near-field reading, 65 * and 0x40 is actual contact, and 0x10 may be a start/stop or change 66 * indication.) 67 */ 68 #define TOUCH_STATE_MASK 0xf0 69 #define TOUCH_STATE_NONE 0x00 70 #define TOUCH_STATE_START 0x30 71 #define TOUCH_STATE_DRAG 0x40 72 73 #define SCROLL_ACCEL_DEFAULT 7 74 75 /* Single touch emulation should only begin when no touches are currently down. 76 * This is true when single_touch_id is equal to NO_TOUCHES. If multiple touches 77 * are down and the touch providing for single touch emulation is lifted, 78 * single_touch_id is equal to SINGLE_TOUCH_UP. While single touch emulation is 79 * occurring, single_touch_id corresponds with the tracking id of the touch used. 80 */ 81 #define NO_TOUCHES -1 82 #define SINGLE_TOUCH_UP -2 83 84 /* Touch surface information. Dimension is in hundredths of a mm, min and max 85 * are in units. */ 86 #define MOUSE_DIMENSION_X (float)9056 87 #define MOUSE_MIN_X -1100 88 #define MOUSE_MAX_X 1258 89 #define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100)) 90 #define MOUSE_DIMENSION_Y (float)5152 91 #define MOUSE_MIN_Y -1589 92 #define MOUSE_MAX_Y 2047 93 #define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100)) 94 95 #define TRACKPAD_DIMENSION_X (float)13000 96 #define TRACKPAD_MIN_X -2909 97 #define TRACKPAD_MAX_X 3167 98 #define TRACKPAD_RES_X \ 99 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100)) 100 #define TRACKPAD_DIMENSION_Y (float)11000 101 #define TRACKPAD_MIN_Y -2456 102 #define TRACKPAD_MAX_Y 2565 103 #define TRACKPAD_RES_Y \ 104 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100)) 105 106 /** 107 * struct magicmouse_sc - Tracks Magic Mouse-specific data. 108 * @input: Input device through which we report events. 109 * @quirks: Currently unused. 110 * @ntouches: Number of touches in most recent touch report. 111 * @scroll_accel: Number of consecutive scroll motions. 112 * @scroll_jiffies: Time of last scroll motion. 113 * @touches: Most recent data for a touch, indexed by tracking ID. 114 * @tracking_ids: Mapping of current touch input data to @touches. 115 */ 116 struct magicmouse_sc { 117 struct input_dev *input; 118 unsigned long quirks; 119 120 int ntouches; 121 int scroll_accel; 122 unsigned long scroll_jiffies; 123 124 struct { 125 short x; 126 short y; 127 short scroll_x; 128 short scroll_y; 129 u8 size; 130 } touches[16]; 131 int tracking_ids[16]; 132 int single_touch_id; 133 }; 134 135 static int magicmouse_firm_touch(struct magicmouse_sc *msc) 136 { 137 int touch = -1; 138 int ii; 139 140 /* If there is only one "firm" touch, set touch to its 141 * tracking ID. 142 */ 143 for (ii = 0; ii < msc->ntouches; ii++) { 144 int idx = msc->tracking_ids[ii]; 145 if (msc->touches[idx].size < 8) { 146 /* Ignore this touch. */ 147 } else if (touch >= 0) { 148 touch = -1; 149 break; 150 } else { 151 touch = idx; 152 } 153 } 154 155 return touch; 156 } 157 158 static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state) 159 { 160 int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 | 161 test_bit(BTN_RIGHT, msc->input->key) << 1 | 162 test_bit(BTN_MIDDLE, msc->input->key) << 2; 163 164 if (emulate_3button) { 165 int id; 166 167 /* If some button was pressed before, keep it held 168 * down. Otherwise, if there's exactly one firm 169 * touch, use that to override the mouse's guess. 170 */ 171 if (state == 0) { 172 /* The button was released. */ 173 } else if (last_state != 0) { 174 state = last_state; 175 } else if ((id = magicmouse_firm_touch(msc)) >= 0) { 176 int x = msc->touches[id].x; 177 if (x < middle_button_start) 178 state = 1; 179 else if (x > middle_button_stop) 180 state = 2; 181 else 182 state = 4; 183 } /* else: we keep the mouse's guess */ 184 185 input_report_key(msc->input, BTN_MIDDLE, state & 4); 186 } 187 188 input_report_key(msc->input, BTN_LEFT, state & 1); 189 input_report_key(msc->input, BTN_RIGHT, state & 2); 190 191 if (state != last_state) 192 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 193 } 194 195 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata) 196 { 197 struct input_dev *input = msc->input; 198 int id, x, y, size, orientation, touch_major, touch_minor, state, down; 199 200 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 201 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf; 202 x = (tdata[1] << 28 | tdata[0] << 20) >> 20; 203 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20); 204 size = tdata[5] & 0x3f; 205 orientation = (tdata[6] >> 2) - 32; 206 touch_major = tdata[3]; 207 touch_minor = tdata[4]; 208 state = tdata[7] & TOUCH_STATE_MASK; 209 down = state != TOUCH_STATE_NONE; 210 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 211 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf; 212 x = (tdata[1] << 27 | tdata[0] << 19) >> 19; 213 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); 214 size = tdata[6] & 0x3f; 215 orientation = (tdata[7] >> 2) - 32; 216 touch_major = tdata[4]; 217 touch_minor = tdata[5]; 218 state = tdata[8] & TOUCH_STATE_MASK; 219 down = state != TOUCH_STATE_NONE; 220 } 221 222 /* Store tracking ID and other fields. */ 223 msc->tracking_ids[raw_id] = id; 224 msc->touches[id].x = x; 225 msc->touches[id].y = y; 226 msc->touches[id].size = size; 227 228 /* If requested, emulate a scroll wheel by detecting small 229 * vertical touch motions. 230 */ 231 if (emulate_scroll_wheel) { 232 unsigned long now = jiffies; 233 int step_x = msc->touches[id].scroll_x - x; 234 int step_y = msc->touches[id].scroll_y - y; 235 236 /* Calculate and apply the scroll motion. */ 237 switch (state) { 238 case TOUCH_STATE_START: 239 msc->touches[id].scroll_x = x; 240 msc->touches[id].scroll_y = y; 241 242 /* Reset acceleration after half a second. */ 243 if (scroll_acceleration && time_before(now, 244 msc->scroll_jiffies + HZ / 2)) 245 msc->scroll_accel = max_t(int, 246 msc->scroll_accel - 1, 1); 247 else 248 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 249 250 break; 251 case TOUCH_STATE_DRAG: 252 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel; 253 if (step_x != 0) { 254 msc->touches[id].scroll_x -= step_x * 255 (64 - scroll_speed) * msc->scroll_accel; 256 msc->scroll_jiffies = now; 257 input_report_rel(input, REL_HWHEEL, -step_x); 258 } 259 260 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel; 261 if (step_y != 0) { 262 msc->touches[id].scroll_y -= step_y * 263 (64 - scroll_speed) * msc->scroll_accel; 264 msc->scroll_jiffies = now; 265 input_report_rel(input, REL_WHEEL, step_y); 266 } 267 break; 268 } 269 } 270 271 if (down) { 272 msc->ntouches++; 273 if (msc->single_touch_id == NO_TOUCHES) 274 msc->single_touch_id = id; 275 } else if (msc->single_touch_id == id) 276 msc->single_touch_id = SINGLE_TOUCH_UP; 277 278 /* Generate the input events for this touch. */ 279 if (report_touches && down) { 280 input_report_abs(input, ABS_MT_TRACKING_ID, id); 281 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2); 282 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2); 283 input_report_abs(input, ABS_MT_ORIENTATION, -orientation); 284 input_report_abs(input, ABS_MT_POSITION_X, x); 285 input_report_abs(input, ABS_MT_POSITION_Y, y); 286 287 if (report_undeciphered) { 288 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) 289 input_event(input, EV_MSC, MSC_RAW, tdata[7]); 290 else /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 291 input_event(input, EV_MSC, MSC_RAW, tdata[8]); 292 } 293 294 input_mt_sync(input); 295 } 296 } 297 298 static int magicmouse_raw_event(struct hid_device *hdev, 299 struct hid_report *report, u8 *data, int size) 300 { 301 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 302 struct input_dev *input = msc->input; 303 int x = 0, y = 0, ii, clicks = 0, npoints; 304 305 switch (data[0]) { 306 case TRACKPAD_REPORT_ID: 307 /* Expect four bytes of prefix, and N*9 bytes of touch data. */ 308 if (size < 4 || ((size - 4) % 9) != 0) 309 return 0; 310 npoints = (size - 4) / 9; 311 msc->ntouches = 0; 312 for (ii = 0; ii < npoints; ii++) 313 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4); 314 315 /* We don't need an MT sync here because trackpad emits a 316 * BTN_TOUCH event in a new frame when all touches are released. 317 */ 318 if (msc->ntouches == 0) 319 msc->single_touch_id = NO_TOUCHES; 320 321 clicks = data[1]; 322 323 /* The following bits provide a device specific timestamp. They 324 * are unused here. 325 * 326 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10; 327 */ 328 break; 329 case MOUSE_REPORT_ID: 330 /* Expect six bytes of prefix, and N*8 bytes of touch data. */ 331 if (size < 6 || ((size - 6) % 8) != 0) 332 return 0; 333 npoints = (size - 6) / 8; 334 msc->ntouches = 0; 335 for (ii = 0; ii < npoints; ii++) 336 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6); 337 338 if (report_touches && msc->ntouches == 0) 339 input_mt_sync(input); 340 341 /* When emulating three-button mode, it is important 342 * to have the current touch information before 343 * generating a click event. 344 */ 345 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22; 346 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22; 347 clicks = data[3]; 348 349 /* The following bits provide a device specific timestamp. They 350 * are unused here. 351 * 352 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10; 353 */ 354 break; 355 case DOUBLE_REPORT_ID: 356 /* Sometimes the trackpad sends two touch reports in one 357 * packet. 358 */ 359 magicmouse_raw_event(hdev, report, data + 2, data[1]); 360 magicmouse_raw_event(hdev, report, data + 2 + data[1], 361 size - 2 - data[1]); 362 break; 363 default: 364 return 0; 365 } 366 367 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 368 magicmouse_emit_buttons(msc, clicks & 3); 369 input_report_rel(input, REL_X, x); 370 input_report_rel(input, REL_Y, y); 371 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 372 input_report_key(input, BTN_MOUSE, clicks & 1); 373 input_report_key(input, BTN_TOUCH, msc->ntouches > 0); 374 input_report_key(input, BTN_TOOL_FINGER, msc->ntouches == 1); 375 input_report_key(input, BTN_TOOL_DOUBLETAP, msc->ntouches == 2); 376 input_report_key(input, BTN_TOOL_TRIPLETAP, msc->ntouches == 3); 377 input_report_key(input, BTN_TOOL_QUADTAP, msc->ntouches == 4); 378 if (msc->single_touch_id >= 0) { 379 input_report_abs(input, ABS_X, 380 msc->touches[msc->single_touch_id].x); 381 input_report_abs(input, ABS_Y, 382 msc->touches[msc->single_touch_id].y); 383 } 384 } 385 386 input_sync(input); 387 return 1; 388 } 389 390 static void magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev) 391 { 392 __set_bit(EV_KEY, input->evbit); 393 394 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 395 __set_bit(BTN_LEFT, input->keybit); 396 __set_bit(BTN_RIGHT, input->keybit); 397 if (emulate_3button) 398 __set_bit(BTN_MIDDLE, input->keybit); 399 400 __set_bit(EV_REL, input->evbit); 401 __set_bit(REL_X, input->relbit); 402 __set_bit(REL_Y, input->relbit); 403 if (emulate_scroll_wheel) { 404 __set_bit(REL_WHEEL, input->relbit); 405 __set_bit(REL_HWHEEL, input->relbit); 406 } 407 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 408 __set_bit(BTN_MOUSE, input->keybit); 409 __set_bit(BTN_TOOL_FINGER, input->keybit); 410 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); 411 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); 412 __set_bit(BTN_TOOL_QUADTAP, input->keybit); 413 __set_bit(BTN_TOUCH, input->keybit); 414 } 415 416 if (report_touches) { 417 __set_bit(EV_ABS, input->evbit); 418 419 input_set_abs_params(input, ABS_MT_TRACKING_ID, 0, 15, 0, 0); 420 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 4, 0); 421 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 4, 0); 422 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); 423 424 /* Note: Touch Y position from the device is inverted relative 425 * to how pointer motion is reported (and relative to how USB 426 * HID recommends the coordinates work). This driver keeps 427 * the origin at the same position, and just uses the additive 428 * inverse of the reported Y. 429 */ 430 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 431 input_set_abs_params(input, ABS_MT_POSITION_X, 432 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0); 433 input_set_abs_params(input, ABS_MT_POSITION_Y, 434 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0); 435 436 input_abs_set_res(input, ABS_MT_POSITION_X, 437 MOUSE_RES_X); 438 input_abs_set_res(input, ABS_MT_POSITION_Y, 439 MOUSE_RES_Y); 440 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 441 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X, 442 TRACKPAD_MAX_X, 4, 0); 443 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y, 444 TRACKPAD_MAX_Y, 4, 0); 445 input_set_abs_params(input, ABS_MT_POSITION_X, 446 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0); 447 input_set_abs_params(input, ABS_MT_POSITION_Y, 448 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0); 449 450 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X); 451 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y); 452 input_abs_set_res(input, ABS_MT_POSITION_X, 453 TRACKPAD_RES_X); 454 input_abs_set_res(input, ABS_MT_POSITION_Y, 455 TRACKPAD_RES_Y); 456 } 457 458 input_set_events_per_packet(input, 60); 459 } 460 461 if (report_undeciphered) { 462 __set_bit(EV_MSC, input->evbit); 463 __set_bit(MSC_RAW, input->mscbit); 464 } 465 } 466 467 static int magicmouse_input_mapping(struct hid_device *hdev, 468 struct hid_input *hi, struct hid_field *field, 469 struct hid_usage *usage, unsigned long **bit, int *max) 470 { 471 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 472 473 if (!msc->input) 474 msc->input = hi->input; 475 476 /* Magic Trackpad does not give relative data after switching to MT */ 477 if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD && 478 field->flags & HID_MAIN_ITEM_RELATIVE) 479 return -1; 480 481 return 0; 482 } 483 484 static int magicmouse_probe(struct hid_device *hdev, 485 const struct hid_device_id *id) 486 { 487 __u8 feature[] = { 0xd7, 0x01 }; 488 struct magicmouse_sc *msc; 489 struct hid_report *report; 490 int ret; 491 492 msc = kzalloc(sizeof(*msc), GFP_KERNEL); 493 if (msc == NULL) { 494 hid_err(hdev, "can't alloc magicmouse descriptor\n"); 495 return -ENOMEM; 496 } 497 498 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 499 500 msc->quirks = id->driver_data; 501 hid_set_drvdata(hdev, msc); 502 503 msc->single_touch_id = NO_TOUCHES; 504 505 ret = hid_parse(hdev); 506 if (ret) { 507 hid_err(hdev, "magicmouse hid parse failed\n"); 508 goto err_free; 509 } 510 511 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 512 if (ret) { 513 hid_err(hdev, "magicmouse hw start failed\n"); 514 goto err_free; 515 } 516 517 /* We do this after hid-input is done parsing reports so that 518 * hid-input uses the most natural button and axis IDs. 519 */ 520 if (msc->input) 521 magicmouse_setup_input(msc->input, hdev); 522 523 if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE) 524 report = hid_register_report(hdev, HID_INPUT_REPORT, 525 MOUSE_REPORT_ID); 526 else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 527 report = hid_register_report(hdev, HID_INPUT_REPORT, 528 TRACKPAD_REPORT_ID); 529 report = hid_register_report(hdev, HID_INPUT_REPORT, 530 DOUBLE_REPORT_ID); 531 } 532 533 if (!report) { 534 hid_err(hdev, "unable to register touch report\n"); 535 ret = -ENOMEM; 536 goto err_stop_hw; 537 } 538 report->size = 6; 539 540 /* 541 * Some devices repond with 'invalid report id' when feature 542 * report switching it into multitouch mode is sent to it. 543 * 544 * This results in -EIO from the _raw low-level transport callback, 545 * but there seems to be no other way of switching the mode. 546 * Thus the super-ugly hacky success check below. 547 */ 548 ret = hdev->hid_output_raw_report(hdev, feature, sizeof(feature), 549 HID_FEATURE_REPORT); 550 if (ret != -EIO && ret != sizeof(feature)) { 551 hid_err(hdev, "unable to request touch data (%d)\n", ret); 552 goto err_stop_hw; 553 } 554 555 return 0; 556 err_stop_hw: 557 hid_hw_stop(hdev); 558 err_free: 559 kfree(msc); 560 return ret; 561 } 562 563 static void magicmouse_remove(struct hid_device *hdev) 564 { 565 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 566 567 hid_hw_stop(hdev); 568 kfree(msc); 569 } 570 571 static const struct hid_device_id magic_mice[] = { 572 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 573 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 }, 574 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 575 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 }, 576 { } 577 }; 578 MODULE_DEVICE_TABLE(hid, magic_mice); 579 580 static struct hid_driver magicmouse_driver = { 581 .name = "magicmouse", 582 .id_table = magic_mice, 583 .probe = magicmouse_probe, 584 .remove = magicmouse_remove, 585 .raw_event = magicmouse_raw_event, 586 .input_mapping = magicmouse_input_mapping, 587 }; 588 589 static int __init magicmouse_init(void) 590 { 591 int ret; 592 593 ret = hid_register_driver(&magicmouse_driver); 594 if (ret) 595 pr_err("can't register magicmouse driver\n"); 596 597 return ret; 598 } 599 600 static void __exit magicmouse_exit(void) 601 { 602 hid_unregister_driver(&magicmouse_driver); 603 } 604 605 module_init(magicmouse_init); 606 module_exit(magicmouse_exit); 607 MODULE_LICENSE("GPL"); 608