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 #include <linux/workqueue.h> 20 21 #include "hid-ids.h" 22 23 static bool emulate_3button = true; 24 module_param(emulate_3button, bool, 0644); 25 MODULE_PARM_DESC(emulate_3button, "Emulate a middle button"); 26 27 static int middle_button_start = -350; 28 static int middle_button_stop = +350; 29 30 static bool emulate_scroll_wheel = true; 31 module_param(emulate_scroll_wheel, bool, 0644); 32 MODULE_PARM_DESC(emulate_scroll_wheel, "Emulate a scroll wheel"); 33 34 static unsigned int scroll_speed = 32; 35 static int param_set_scroll_speed(const char *val, 36 const struct kernel_param *kp) { 37 unsigned long speed; 38 if (!val || kstrtoul(val, 0, &speed) || speed > 63) 39 return -EINVAL; 40 scroll_speed = speed; 41 return 0; 42 } 43 module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644); 44 MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)"); 45 46 static bool scroll_acceleration = false; 47 module_param(scroll_acceleration, bool, 0644); 48 MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events"); 49 50 static bool report_undeciphered; 51 module_param(report_undeciphered, bool, 0644); 52 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event"); 53 54 #define TRACKPAD2_2021_BT_VERSION 0x110 55 #define TRACKPAD_2024_BT_VERSION 0x314 56 57 #define TRACKPAD_REPORT_ID 0x28 58 #define TRACKPAD2_USB_REPORT_ID 0x02 59 #define TRACKPAD2_BT_REPORT_ID 0x31 60 #define MOUSE_REPORT_ID 0x29 61 #define MOUSE2_REPORT_ID 0x12 62 #define DOUBLE_REPORT_ID 0xf7 63 #define USB_BATTERY_TIMEOUT_SEC 60 64 65 /* These definitions are not precise, but they're close enough. (Bits 66 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem 67 * to be some kind of bit mask -- 0x20 may be a near-field reading, 68 * and 0x40 is actual contact, and 0x10 may be a start/stop or change 69 * indication.) 70 */ 71 #define TOUCH_STATE_MASK 0xf0 72 #define TOUCH_STATE_NONE 0x00 73 #define TOUCH_STATE_START 0x30 74 #define TOUCH_STATE_DRAG 0x40 75 76 /* Number of high-resolution events for each low-resolution detent. */ 77 #define SCROLL_HR_STEPS 10 78 #define SCROLL_HR_MULT (120 / SCROLL_HR_STEPS) 79 #define SCROLL_HR_THRESHOLD 90 /* units */ 80 #define SCROLL_ACCEL_DEFAULT 7 81 82 /* Touch surface information. Dimension is in hundredths of a mm, min and max 83 * are in units. */ 84 #define MOUSE_DIMENSION_X (float)9056 85 #define MOUSE_MIN_X -1100 86 #define MOUSE_MAX_X 1258 87 #define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100)) 88 #define MOUSE_DIMENSION_Y (float)5152 89 #define MOUSE_MIN_Y -1589 90 #define MOUSE_MAX_Y 2047 91 #define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100)) 92 93 #define TRACKPAD_DIMENSION_X (float)13000 94 #define TRACKPAD_MIN_X -2909 95 #define TRACKPAD_MAX_X 3167 96 #define TRACKPAD_RES_X \ 97 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100)) 98 #define TRACKPAD_DIMENSION_Y (float)11000 99 #define TRACKPAD_MIN_Y -2456 100 #define TRACKPAD_MAX_Y 2565 101 #define TRACKPAD_RES_Y \ 102 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100)) 103 104 #define TRACKPAD2_DIMENSION_X (float)16000 105 #define TRACKPAD2_MIN_X -3678 106 #define TRACKPAD2_MAX_X 3934 107 #define TRACKPAD2_RES_X \ 108 ((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100)) 109 #define TRACKPAD2_DIMENSION_Y (float)11490 110 #define TRACKPAD2_MIN_Y -2478 111 #define TRACKPAD2_MAX_Y 2587 112 #define TRACKPAD2_RES_Y \ 113 ((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100)) 114 115 /** 116 * struct magicmouse_sc - Tracks Magic Mouse-specific data. 117 * @input: Input device through which we report events. 118 * @quirks: Currently unused. 119 * @ntouches: Number of touches in most recent touch report. 120 * @scroll_accel: Number of consecutive scroll motions. 121 * @scroll_jiffies: Time of last scroll motion. 122 * @touches: Most recent data for a touch, indexed by tracking ID. 123 * @tracking_ids: Mapping of current touch input data to @touches. 124 * @hdev: Pointer to the underlying HID device. 125 * @work: Workqueue to handle initialization retry for quirky devices. 126 * @battery_timer: Timer for obtaining battery level information. 127 */ 128 struct magicmouse_sc { 129 struct input_dev *input; 130 unsigned long quirks; 131 132 int ntouches; 133 int scroll_accel; 134 unsigned long scroll_jiffies; 135 136 struct { 137 short x; 138 short y; 139 short scroll_x; 140 short scroll_y; 141 short scroll_x_hr; 142 short scroll_y_hr; 143 u8 size; 144 bool scroll_x_active; 145 bool scroll_y_active; 146 } touches[16]; 147 int tracking_ids[16]; 148 149 struct hid_device *hdev; 150 struct delayed_work work; 151 struct timer_list battery_timer; 152 }; 153 154 static int magicmouse_firm_touch(struct magicmouse_sc *msc) 155 { 156 int touch = -1; 157 int ii; 158 159 /* If there is only one "firm" touch, set touch to its 160 * tracking ID. 161 */ 162 for (ii = 0; ii < msc->ntouches; ii++) { 163 int idx = msc->tracking_ids[ii]; 164 if (msc->touches[idx].size < 8) { 165 /* Ignore this touch. */ 166 } else if (touch >= 0) { 167 touch = -1; 168 break; 169 } else { 170 touch = idx; 171 } 172 } 173 174 return touch; 175 } 176 177 static void magicmouse_emit_buttons(struct magicmouse_sc *msc, int state) 178 { 179 int last_state = test_bit(BTN_LEFT, msc->input->key) << 0 | 180 test_bit(BTN_RIGHT, msc->input->key) << 1 | 181 test_bit(BTN_MIDDLE, msc->input->key) << 2; 182 183 if (emulate_3button) { 184 int id; 185 186 /* If some button was pressed before, keep it held 187 * down. Otherwise, if there's exactly one firm 188 * touch, use that to override the mouse's guess. 189 */ 190 if (state == 0) { 191 /* The button was released. */ 192 } else if (last_state != 0) { 193 state = last_state; 194 } else if ((id = magicmouse_firm_touch(msc)) >= 0) { 195 int x = msc->touches[id].x; 196 if (x < middle_button_start) 197 state = 1; 198 else if (x > middle_button_stop) 199 state = 2; 200 else 201 state = 4; 202 } /* else: we keep the mouse's guess */ 203 204 input_report_key(msc->input, BTN_MIDDLE, state & 4); 205 } 206 207 input_report_key(msc->input, BTN_LEFT, state & 1); 208 input_report_key(msc->input, BTN_RIGHT, state & 2); 209 210 if (state != last_state) 211 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 212 } 213 214 static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tdata) 215 { 216 struct input_dev *input = msc->input; 217 int id, x, y, size, orientation, touch_major, touch_minor, state, down; 218 int pressure = 0; 219 220 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE || 221 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 222 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) { 223 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf; 224 x = (tdata[1] << 28 | tdata[0] << 20) >> 20; 225 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20); 226 size = tdata[5] & 0x3f; 227 orientation = (tdata[6] >> 2) - 32; 228 touch_major = tdata[3]; 229 touch_minor = tdata[4]; 230 state = tdata[7] & TOUCH_STATE_MASK; 231 down = state != TOUCH_STATE_NONE; 232 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 233 input->id.product == 234 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 235 id = tdata[8] & 0xf; 236 x = (tdata[1] << 27 | tdata[0] << 19) >> 19; 237 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); 238 size = tdata[6]; 239 orientation = (tdata[8] >> 5) - 4; 240 touch_major = tdata[4]; 241 touch_minor = tdata[5]; 242 pressure = tdata[7]; 243 state = tdata[3] & 0xC0; 244 down = state == 0x80; 245 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 246 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf; 247 x = (tdata[1] << 27 | tdata[0] << 19) >> 19; 248 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); 249 size = tdata[6] & 0x3f; 250 orientation = (tdata[7] >> 2) - 32; 251 touch_major = tdata[4]; 252 touch_minor = tdata[5]; 253 state = tdata[8] & TOUCH_STATE_MASK; 254 down = state != TOUCH_STATE_NONE; 255 } 256 257 /* Store tracking ID and other fields. */ 258 msc->tracking_ids[raw_id] = id; 259 msc->touches[id].x = x; 260 msc->touches[id].y = y; 261 msc->touches[id].size = size; 262 263 /* If requested, emulate a scroll wheel by detecting small 264 * vertical touch motions. 265 */ 266 if (emulate_scroll_wheel && 267 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && 268 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 269 unsigned long now = jiffies; 270 int step_x = msc->touches[id].scroll_x - x; 271 int step_y = msc->touches[id].scroll_y - y; 272 int step_hr = 273 max_t(int, 274 ((64 - (int)scroll_speed) * msc->scroll_accel) / 275 SCROLL_HR_STEPS, 276 1); 277 int step_x_hr = msc->touches[id].scroll_x_hr - x; 278 int step_y_hr = msc->touches[id].scroll_y_hr - y; 279 280 /* Calculate and apply the scroll motion. */ 281 switch (state) { 282 case TOUCH_STATE_START: 283 msc->touches[id].scroll_x = x; 284 msc->touches[id].scroll_y = y; 285 msc->touches[id].scroll_x_hr = x; 286 msc->touches[id].scroll_y_hr = y; 287 msc->touches[id].scroll_x_active = false; 288 msc->touches[id].scroll_y_active = false; 289 290 /* Reset acceleration after half a second. */ 291 if (scroll_acceleration && time_before(now, 292 msc->scroll_jiffies + HZ / 2)) 293 msc->scroll_accel = max_t(int, 294 msc->scroll_accel - 1, 1); 295 else 296 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 297 298 break; 299 case TOUCH_STATE_DRAG: 300 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel; 301 if (step_x != 0) { 302 msc->touches[id].scroll_x -= step_x * 303 (64 - scroll_speed) * msc->scroll_accel; 304 msc->scroll_jiffies = now; 305 input_report_rel(input, REL_HWHEEL, -step_x); 306 } 307 308 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel; 309 if (step_y != 0) { 310 msc->touches[id].scroll_y -= step_y * 311 (64 - scroll_speed) * msc->scroll_accel; 312 msc->scroll_jiffies = now; 313 input_report_rel(input, REL_WHEEL, step_y); 314 } 315 316 if (!msc->touches[id].scroll_x_active && 317 abs(step_x_hr) > SCROLL_HR_THRESHOLD) { 318 msc->touches[id].scroll_x_active = true; 319 msc->touches[id].scroll_x_hr = x; 320 step_x_hr = 0; 321 } 322 323 step_x_hr /= step_hr; 324 if (step_x_hr != 0 && 325 msc->touches[id].scroll_x_active) { 326 msc->touches[id].scroll_x_hr -= step_x_hr * 327 step_hr; 328 input_report_rel(input, 329 REL_HWHEEL_HI_RES, 330 -step_x_hr * SCROLL_HR_MULT); 331 } 332 333 if (!msc->touches[id].scroll_y_active && 334 abs(step_y_hr) > SCROLL_HR_THRESHOLD) { 335 msc->touches[id].scroll_y_active = true; 336 msc->touches[id].scroll_y_hr = y; 337 step_y_hr = 0; 338 } 339 340 step_y_hr /= step_hr; 341 if (step_y_hr != 0 && 342 msc->touches[id].scroll_y_active) { 343 msc->touches[id].scroll_y_hr -= step_y_hr * 344 step_hr; 345 input_report_rel(input, 346 REL_WHEEL_HI_RES, 347 step_y_hr * SCROLL_HR_MULT); 348 } 349 break; 350 } 351 } 352 353 if (down) 354 msc->ntouches++; 355 356 input_mt_slot(input, id); 357 input_mt_report_slot_state(input, MT_TOOL_FINGER, down); 358 359 /* Generate the input events for this touch. */ 360 if (down) { 361 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2); 362 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2); 363 input_report_abs(input, ABS_MT_ORIENTATION, -orientation); 364 input_report_abs(input, ABS_MT_POSITION_X, x); 365 input_report_abs(input, ABS_MT_POSITION_Y, y); 366 367 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 368 input->id.product == 369 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) 370 input_report_abs(input, ABS_MT_PRESSURE, pressure); 371 372 if (report_undeciphered) { 373 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE || 374 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 375 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) 376 input_event(input, EV_MSC, MSC_RAW, tdata[7]); 377 else if (input->id.product != 378 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && 379 input->id.product != 380 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) 381 input_event(input, EV_MSC, MSC_RAW, tdata[8]); 382 } 383 } 384 } 385 386 static int magicmouse_raw_event(struct hid_device *hdev, 387 struct hid_report *report, u8 *data, int size) 388 { 389 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 390 struct input_dev *input = msc->input; 391 int x = 0, y = 0, ii, clicks = 0, npoints; 392 393 /* Protect against zero sized recursive calls from DOUBLE_REPORT_ID */ 394 if (size < 1) 395 return 0; 396 397 switch (data[0]) { 398 case TRACKPAD_REPORT_ID: 399 case TRACKPAD2_BT_REPORT_ID: 400 /* Expect four bytes of prefix, and N*9 bytes of touch data. */ 401 if (size < 4 || ((size - 4) % 9) != 0) 402 return 0; 403 npoints = (size - 4) / 9; 404 if (npoints > 15) { 405 hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n", 406 size); 407 return 0; 408 } 409 msc->ntouches = 0; 410 for (ii = 0; ii < npoints; ii++) 411 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4); 412 413 clicks = data[1]; 414 415 /* The following bits provide a device specific timestamp. They 416 * are unused here. 417 * 418 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10; 419 */ 420 break; 421 case TRACKPAD2_USB_REPORT_ID: 422 /* Expect twelve bytes of prefix and N*9 bytes of touch data. */ 423 if (size < 12 || ((size - 12) % 9) != 0) 424 return 0; 425 npoints = (size - 12) / 9; 426 if (npoints > 15) { 427 hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n", 428 size); 429 return 0; 430 } 431 msc->ntouches = 0; 432 for (ii = 0; ii < npoints; ii++) 433 magicmouse_emit_touch(msc, ii, data + ii * 9 + 12); 434 435 clicks = data[1]; 436 break; 437 case MOUSE_REPORT_ID: 438 /* Expect six bytes of prefix, and N*8 bytes of touch data. */ 439 if (size < 6 || ((size - 6) % 8) != 0) 440 return 0; 441 npoints = (size - 6) / 8; 442 if (npoints > 15) { 443 hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n", 444 size); 445 return 0; 446 } 447 msc->ntouches = 0; 448 for (ii = 0; ii < npoints; ii++) 449 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6); 450 451 /* When emulating three-button mode, it is important 452 * to have the current touch information before 453 * generating a click event. 454 */ 455 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22; 456 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22; 457 clicks = data[3]; 458 459 /* The following bits provide a device specific timestamp. They 460 * are unused here. 461 * 462 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10; 463 */ 464 break; 465 case MOUSE2_REPORT_ID: 466 /* Size is either 8 or (14 + 8 * N) */ 467 if (size != 8 && (size < 14 || (size - 14) % 8 != 0)) 468 return 0; 469 npoints = (size - 14) / 8; 470 if (npoints > 15) { 471 hid_warn(hdev, "invalid size value (%d) for MOUSE2_REPORT_ID\n", 472 size); 473 return 0; 474 } 475 msc->ntouches = 0; 476 for (ii = 0; ii < npoints; ii++) 477 magicmouse_emit_touch(msc, ii, data + ii * 8 + 14); 478 479 /* When emulating three-button mode, it is important 480 * to have the current touch information before 481 * generating a click event. 482 */ 483 x = (int)((data[3] << 24) | (data[2] << 16)) >> 16; 484 y = (int)((data[5] << 24) | (data[4] << 16)) >> 16; 485 clicks = data[1]; 486 487 /* The following bits provide a device specific timestamp. They 488 * are unused here. 489 * 490 * ts = data[11] >> 6 | data[12] << 2 | data[13] << 10; 491 */ 492 break; 493 case DOUBLE_REPORT_ID: 494 /* Sometimes the trackpad sends two touch reports in one 495 * packet. 496 */ 497 498 /* Ensure that we have at least 2 elements (report type and size) */ 499 if (size < 2) 500 return 0; 501 502 if (size < data[1] + 2) { 503 hid_warn(hdev, 504 "received report length (%d) was smaller than specified (%d)", 505 size, data[1] + 2); 506 return 0; 507 } 508 509 magicmouse_raw_event(hdev, report, data + 2, data[1]); 510 magicmouse_raw_event(hdev, report, data + 2 + data[1], 511 size - 2 - data[1]); 512 return 0; 513 default: 514 return 0; 515 } 516 517 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE || 518 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 519 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) { 520 magicmouse_emit_buttons(msc, clicks & 3); 521 input_report_rel(input, REL_X, x); 522 input_report_rel(input, REL_Y, y); 523 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 524 input->id.product == 525 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 526 input_mt_sync_frame(input); 527 input_report_key(input, BTN_MOUSE, clicks & 1); 528 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 529 input_report_key(input, BTN_MOUSE, clicks & 1); 530 input_mt_report_pointer_emulation(input, true); 531 } 532 533 input_sync(input); 534 return 1; 535 } 536 537 static int magicmouse_event(struct hid_device *hdev, struct hid_field *field, 538 struct hid_usage *usage, __s32 value) 539 { 540 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 541 if ((msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 542 msc->input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) && 543 field->report->id == MOUSE2_REPORT_ID) { 544 /* 545 * magic_mouse_raw_event has done all the work. Skip hidinput. 546 * 547 * Specifically, hidinput may modify BTN_LEFT and BTN_RIGHT, 548 * breaking emulate_3button. 549 */ 550 return 1; 551 } 552 return 0; 553 } 554 555 static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev) 556 { 557 int error; 558 int mt_flags = 0; 559 560 __set_bit(EV_KEY, input->evbit); 561 562 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE || 563 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 564 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) { 565 __set_bit(BTN_LEFT, input->keybit); 566 __set_bit(BTN_RIGHT, input->keybit); 567 if (emulate_3button) 568 __set_bit(BTN_MIDDLE, input->keybit); 569 570 __set_bit(EV_REL, input->evbit); 571 __set_bit(REL_X, input->relbit); 572 __set_bit(REL_Y, input->relbit); 573 if (emulate_scroll_wheel) { 574 __set_bit(REL_WHEEL, input->relbit); 575 __set_bit(REL_HWHEEL, input->relbit); 576 __set_bit(REL_WHEEL_HI_RES, input->relbit); 577 __set_bit(REL_HWHEEL_HI_RES, input->relbit); 578 } 579 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 580 input->id.product == 581 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 582 /* If the trackpad has been connected to a Mac, the name is 583 * automatically personalized, e.g., "José Expósito's Trackpad". 584 * When connected through Bluetooth, the personalized name is 585 * reported, however, when connected through USB the generic 586 * name is reported. 587 * Set the device name to ensure the same driver settings get 588 * loaded, whether connected through bluetooth or USB. 589 */ 590 if (hdev->vendor == BT_VENDOR_ID_APPLE) { 591 if (input->id.version == TRACKPAD2_2021_BT_VERSION) 592 input->name = "Apple Inc. Magic Trackpad 2021"; 593 else if (input->id.version == TRACKPAD_2024_BT_VERSION) { 594 input->name = "Apple Inc. Magic Trackpad USB-C"; 595 } else { 596 input->name = "Apple Inc. Magic Trackpad"; 597 } 598 } else { /* USB_VENDOR_ID_APPLE */ 599 input->name = hdev->name; 600 } 601 602 __clear_bit(EV_MSC, input->evbit); 603 __clear_bit(BTN_0, input->keybit); 604 __clear_bit(BTN_RIGHT, input->keybit); 605 __clear_bit(BTN_MIDDLE, input->keybit); 606 __set_bit(BTN_MOUSE, input->keybit); 607 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 608 __set_bit(BTN_TOOL_FINGER, input->keybit); 609 610 mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 611 INPUT_MT_TRACK; 612 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 613 /* input->keybit is initialized with incorrect button info 614 * for Magic Trackpad. There really is only one physical 615 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't 616 * advertise buttons that don't exist... 617 */ 618 __clear_bit(BTN_RIGHT, input->keybit); 619 __clear_bit(BTN_MIDDLE, input->keybit); 620 __set_bit(BTN_MOUSE, input->keybit); 621 __set_bit(BTN_TOOL_FINGER, input->keybit); 622 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); 623 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); 624 __set_bit(BTN_TOOL_QUADTAP, input->keybit); 625 __set_bit(BTN_TOOL_QUINTTAP, input->keybit); 626 __set_bit(BTN_TOUCH, input->keybit); 627 __set_bit(INPUT_PROP_POINTER, input->propbit); 628 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 629 } 630 631 632 __set_bit(EV_ABS, input->evbit); 633 634 error = input_mt_init_slots(input, 16, mt_flags); 635 if (error) 636 return error; 637 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2, 638 4, 0); 639 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2, 640 4, 0); 641 642 /* Note: Touch Y position from the device is inverted relative 643 * to how pointer motion is reported (and relative to how USB 644 * HID recommends the coordinates work). This driver keeps 645 * the origin at the same position, and just uses the additive 646 * inverse of the reported Y. 647 */ 648 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE || 649 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 650 input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC) { 651 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); 652 input_set_abs_params(input, ABS_MT_POSITION_X, 653 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0); 654 input_set_abs_params(input, ABS_MT_POSITION_Y, 655 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0); 656 657 input_abs_set_res(input, ABS_MT_POSITION_X, 658 MOUSE_RES_X); 659 input_abs_set_res(input, ABS_MT_POSITION_Y, 660 MOUSE_RES_Y); 661 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 662 input->id.product == 663 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 664 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0); 665 input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0); 666 input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0); 667 input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X, 668 TRACKPAD2_MAX_X, 0, 0); 669 input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y, 670 TRACKPAD2_MAX_Y, 0, 0); 671 input_set_abs_params(input, ABS_MT_POSITION_X, 672 TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0); 673 input_set_abs_params(input, ABS_MT_POSITION_Y, 674 TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0); 675 676 input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X); 677 input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y); 678 input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X); 679 input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y); 680 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 681 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); 682 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X, 683 TRACKPAD_MAX_X, 4, 0); 684 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y, 685 TRACKPAD_MAX_Y, 4, 0); 686 input_set_abs_params(input, ABS_MT_POSITION_X, 687 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0); 688 input_set_abs_params(input, ABS_MT_POSITION_Y, 689 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0); 690 691 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X); 692 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y); 693 input_abs_set_res(input, ABS_MT_POSITION_X, 694 TRACKPAD_RES_X); 695 input_abs_set_res(input, ABS_MT_POSITION_Y, 696 TRACKPAD_RES_Y); 697 } 698 699 input_set_events_per_packet(input, 60); 700 701 if (report_undeciphered && 702 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && 703 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) { 704 __set_bit(EV_MSC, input->evbit); 705 __set_bit(MSC_RAW, input->mscbit); 706 } 707 708 /* 709 * hid-input may mark device as using autorepeat, but neither 710 * the trackpad, nor the mouse actually want it. 711 */ 712 __clear_bit(EV_REP, input->evbit); 713 714 return 0; 715 } 716 717 static int magicmouse_input_mapping(struct hid_device *hdev, 718 struct hid_input *hi, struct hid_field *field, 719 struct hid_usage *usage, unsigned long **bit, int *max) 720 { 721 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 722 723 if (!msc->input) 724 msc->input = hi->input; 725 726 /* Magic Trackpad does not give relative data after switching to MT */ 727 if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD || 728 hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 729 hi->input->id.product == 730 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) && 731 field->flags & HID_MAIN_ITEM_RELATIVE) 732 return -1; 733 734 return 0; 735 } 736 737 static int magicmouse_input_configured(struct hid_device *hdev, 738 struct hid_input *hi) 739 740 { 741 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 742 int ret; 743 744 if (!msc->input) { 745 hid_err(hdev, "magicmouse setup input failed (no input)"); 746 return -EINVAL; 747 } 748 749 ret = magicmouse_setup_input(msc->input, hdev); 750 if (ret) { 751 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret); 752 /* clean msc->input to notify probe() of the failure */ 753 msc->input = NULL; 754 return ret; 755 } 756 757 return 0; 758 } 759 760 static int magicmouse_enable_multitouch(struct hid_device *hdev) 761 { 762 const u8 *feature; 763 const u8 feature_mt[] = { 0xD7, 0x01 }; 764 const u8 feature_mt_mouse2[] = { 0xF1, 0x02, 0x01 }; 765 const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 }; 766 const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 }; 767 u8 *buf; 768 int ret; 769 int feature_size; 770 771 switch (hdev->product) { 772 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2: 773 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC: 774 switch (hdev->vendor) { 775 case BT_VENDOR_ID_APPLE: 776 feature_size = sizeof(feature_mt_trackpad2_bt); 777 feature = feature_mt_trackpad2_bt; 778 break; 779 default: /* USB_VENDOR_ID_APPLE */ 780 feature_size = sizeof(feature_mt_trackpad2_usb); 781 feature = feature_mt_trackpad2_usb; 782 } 783 break; 784 case USB_DEVICE_ID_APPLE_MAGICMOUSE2: 785 case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC: 786 feature_size = sizeof(feature_mt_mouse2); 787 feature = feature_mt_mouse2; 788 break; 789 default: 790 feature_size = sizeof(feature_mt); 791 feature = feature_mt; 792 } 793 794 buf = kmemdup(feature, feature_size, GFP_KERNEL); 795 if (!buf) 796 return -ENOMEM; 797 798 ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size, 799 HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 800 kfree(buf); 801 return ret; 802 } 803 804 static void magicmouse_enable_mt_work(struct work_struct *work) 805 { 806 struct magicmouse_sc *msc = 807 container_of(work, struct magicmouse_sc, work.work); 808 int ret; 809 810 ret = magicmouse_enable_multitouch(msc->hdev); 811 if (ret < 0) 812 hid_err(msc->hdev, "unable to request touch data (%d)\n", ret); 813 } 814 815 static bool is_usb_magicmouse2(__u32 vendor, __u32 product) 816 { 817 if (vendor != USB_VENDOR_ID_APPLE) 818 return false; 819 return product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 820 product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC; 821 } 822 823 static bool is_usb_magictrackpad2(__u32 vendor, __u32 product) 824 { 825 if (vendor != USB_VENDOR_ID_APPLE) 826 return false; 827 return product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 || 828 product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC; 829 } 830 831 static int magicmouse_fetch_battery(struct hid_device *hdev) 832 { 833 #ifdef CONFIG_HID_BATTERY_STRENGTH 834 struct hid_report_enum *report_enum; 835 struct hid_report *report; 836 struct hid_battery *bat; 837 838 bat = hid_get_battery(hdev); 839 if (!bat || 840 (!is_usb_magicmouse2(hdev->vendor, hdev->product) && 841 !is_usb_magictrackpad2(hdev->vendor, hdev->product))) 842 return -1; 843 844 report_enum = &hdev->report_enum[bat->report_type]; 845 report = report_enum->report_id_hash[bat->report_id]; 846 847 if (!report || report->maxfield < 1) 848 return -1; 849 850 if (bat->capacity == bat->max) 851 return -1; 852 853 hid_hw_request(hdev, report, HID_REQ_GET_REPORT); 854 return 0; 855 #else 856 return -1; 857 #endif 858 } 859 860 static void magicmouse_battery_timer_tick(struct timer_list *t) 861 { 862 struct magicmouse_sc *msc = timer_container_of(msc, t, battery_timer); 863 struct hid_device *hdev = msc->hdev; 864 865 if (magicmouse_fetch_battery(hdev) == 0) { 866 mod_timer(&msc->battery_timer, 867 jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC)); 868 } 869 } 870 871 static int magicmouse_probe(struct hid_device *hdev, 872 const struct hid_device_id *id) 873 { 874 struct magicmouse_sc *msc; 875 struct hid_report *report; 876 int ret; 877 878 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL); 879 if (msc == NULL) { 880 hid_err(hdev, "can't alloc magicmouse descriptor\n"); 881 return -ENOMEM; 882 } 883 884 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 885 msc->hdev = hdev; 886 INIT_DEFERRABLE_WORK(&msc->work, magicmouse_enable_mt_work); 887 888 msc->quirks = id->driver_data; 889 hid_set_drvdata(hdev, msc); 890 891 ret = hid_parse(hdev); 892 if (ret) { 893 hid_err(hdev, "magicmouse hid parse failed\n"); 894 return ret; 895 } 896 897 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 898 if (ret) { 899 hid_err(hdev, "magicmouse hw start failed\n"); 900 return ret; 901 } 902 903 if (is_usb_magicmouse2(id->vendor, id->product) || 904 is_usb_magictrackpad2(id->vendor, id->product)) { 905 timer_setup(&msc->battery_timer, magicmouse_battery_timer_tick, 0); 906 mod_timer(&msc->battery_timer, 907 jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC)); 908 magicmouse_fetch_battery(hdev); 909 } 910 911 if (is_usb_magicmouse2(id->vendor, id->product) || 912 (is_usb_magictrackpad2(id->vendor, id->product) && 913 hdev->type != HID_TYPE_USBMOUSE)) 914 return 0; 915 916 if (!msc->input) { 917 hid_err(hdev, "magicmouse input not registered\n"); 918 ret = -ENOMEM; 919 goto err_stop_hw; 920 } 921 922 switch (id->product) { 923 case USB_DEVICE_ID_APPLE_MAGICMOUSE: 924 report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE_REPORT_ID, 0); 925 break; 926 case USB_DEVICE_ID_APPLE_MAGICMOUSE2: 927 case USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC: 928 report = hid_register_report(hdev, HID_INPUT_REPORT, MOUSE2_REPORT_ID, 0); 929 break; 930 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2: 931 case USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC: 932 switch (id->vendor) { 933 case BT_VENDOR_ID_APPLE: 934 report = hid_register_report(hdev, HID_INPUT_REPORT, 935 TRACKPAD2_BT_REPORT_ID, 0); 936 break; 937 default: 938 report = hid_register_report(hdev, HID_INPUT_REPORT, 939 TRACKPAD2_USB_REPORT_ID, 0); 940 } 941 break; 942 default: /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 943 report = hid_register_report(hdev, HID_INPUT_REPORT, 944 TRACKPAD_REPORT_ID, 0); 945 report = hid_register_report(hdev, HID_INPUT_REPORT, 946 DOUBLE_REPORT_ID, 0); 947 } 948 949 if (!report) { 950 hid_err(hdev, "unable to register touch report\n"); 951 ret = -ENOMEM; 952 goto err_stop_hw; 953 } 954 report->size = 6; 955 956 /* 957 * Some devices repond with 'invalid report id' when feature 958 * report switching it into multitouch mode is sent to it. 959 * 960 * This results in -EIO from the _raw low-level transport callback, 961 * but there seems to be no other way of switching the mode. 962 * Thus the super-ugly hacky success check below. 963 */ 964 ret = magicmouse_enable_multitouch(hdev); 965 if (ret != -EIO && ret < 0) { 966 hid_err(hdev, "unable to request touch data (%d)\n", ret); 967 goto err_stop_hw; 968 } 969 if (ret == -EIO && (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2 || 970 id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC)) { 971 schedule_delayed_work(&msc->work, msecs_to_jiffies(500)); 972 } 973 974 return 0; 975 err_stop_hw: 976 if (is_usb_magicmouse2(id->vendor, id->product) || 977 is_usb_magictrackpad2(id->vendor, id->product)) 978 timer_delete_sync(&msc->battery_timer); 979 980 hid_hw_stop(hdev); 981 return ret; 982 } 983 984 static void magicmouse_remove(struct hid_device *hdev) 985 { 986 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 987 988 if (msc) { 989 cancel_delayed_work_sync(&msc->work); 990 if (is_usb_magicmouse2(hdev->vendor, hdev->product) || 991 is_usb_magictrackpad2(hdev->vendor, hdev->product)) 992 timer_delete_sync(&msc->battery_timer); 993 } 994 995 hid_hw_stop(hdev); 996 } 997 998 static const __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc, 999 unsigned int *rsize) 1000 { 1001 /* 1002 * Change the usage from: 1003 * 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 0 1004 * 0x09, 0x0b, // Usage (Vendor Usage 0x0b) 3 1005 * To: 1006 * 0x05, 0x01, // Usage Page (Generic Desktop) 0 1007 * 0x09, 0x02, // Usage (Mouse) 2 1008 */ 1009 if ((is_usb_magicmouse2(hdev->vendor, hdev->product) || 1010 is_usb_magictrackpad2(hdev->vendor, hdev->product)) && 1011 *rsize >= 83 && rdesc[46] == 0x84 && rdesc[58] == 0x85) { 1012 hid_info(hdev, 1013 "fixing up magicmouse battery report descriptor\n"); 1014 *rsize = *rsize - 1; 1015 rdesc = rdesc + 1; 1016 1017 rdesc[0] = 0x05; 1018 rdesc[1] = 0x01; 1019 rdesc[2] = 0x09; 1020 rdesc[3] = 0x02; 1021 } 1022 1023 return rdesc; 1024 } 1025 1026 static const struct hid_device_id magic_mice[] = { 1027 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 1028 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 }, 1029 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 1030 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 }, 1031 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 1032 USB_DEVICE_ID_APPLE_MAGICMOUSE2), .driver_data = 0 }, 1033 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 1034 USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 }, 1035 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 1036 USB_DEVICE_ID_APPLE_MAGICMOUSE2_USBC), .driver_data = 0 }, 1037 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 1038 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 }, 1039 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 1040 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 }, 1041 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 1042 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 }, 1043 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 1044 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), .driver_data = 0 }, 1045 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 1046 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), .driver_data = 0 }, 1047 { } 1048 }; 1049 MODULE_DEVICE_TABLE(hid, magic_mice); 1050 1051 static struct hid_driver magicmouse_driver = { 1052 .name = "magicmouse", 1053 .id_table = magic_mice, 1054 .probe = magicmouse_probe, 1055 .remove = magicmouse_remove, 1056 .report_fixup = magicmouse_report_fixup, 1057 .raw_event = magicmouse_raw_event, 1058 .event = magicmouse_event, 1059 .input_mapping = magicmouse_input_mapping, 1060 .input_configured = magicmouse_input_configured, 1061 }; 1062 module_hid_driver(magicmouse_driver); 1063 1064 MODULE_DESCRIPTION("Apple \"Magic\" Wireless Mouse driver"); 1065 MODULE_LICENSE("GPL"); 1066