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 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, 38 const struct kernel_param *kp) { 39 unsigned long speed; 40 if (!val || kstrtoul(val, 0, &speed) || speed > 63) 41 return -EINVAL; 42 scroll_speed = speed; 43 return 0; 44 } 45 module_param_call(scroll_speed, param_set_scroll_speed, param_get_uint, &scroll_speed, 0644); 46 MODULE_PARM_DESC(scroll_speed, "Scroll speed, value from 0 (slow) to 63 (fast)"); 47 48 static bool scroll_acceleration = false; 49 module_param(scroll_acceleration, bool, 0644); 50 MODULE_PARM_DESC(scroll_acceleration, "Accelerate sequential scroll events"); 51 52 static bool report_undeciphered; 53 module_param(report_undeciphered, bool, 0644); 54 MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state field using a MSC_RAW event"); 55 56 #define TRACKPAD_REPORT_ID 0x28 57 #define TRACKPAD2_USB_REPORT_ID 0x02 58 #define TRACKPAD2_BT_REPORT_ID 0x31 59 #define MOUSE_REPORT_ID 0x29 60 #define DOUBLE_REPORT_ID 0xf7 61 /* These definitions are not precise, but they're close enough. (Bits 62 * 0x03 seem to indicate the aspect ratio of the touch, bits 0x70 seem 63 * to be some kind of bit mask -- 0x20 may be a near-field reading, 64 * and 0x40 is actual contact, and 0x10 may be a start/stop or change 65 * indication.) 66 */ 67 #define TOUCH_STATE_MASK 0xf0 68 #define TOUCH_STATE_NONE 0x00 69 #define TOUCH_STATE_START 0x30 70 #define TOUCH_STATE_DRAG 0x40 71 72 #define SCROLL_ACCEL_DEFAULT 7 73 74 /* Touch surface information. Dimension is in hundredths of a mm, min and max 75 * are in units. */ 76 #define MOUSE_DIMENSION_X (float)9056 77 #define MOUSE_MIN_X -1100 78 #define MOUSE_MAX_X 1258 79 #define MOUSE_RES_X ((MOUSE_MAX_X - MOUSE_MIN_X) / (MOUSE_DIMENSION_X / 100)) 80 #define MOUSE_DIMENSION_Y (float)5152 81 #define MOUSE_MIN_Y -1589 82 #define MOUSE_MAX_Y 2047 83 #define MOUSE_RES_Y ((MOUSE_MAX_Y - MOUSE_MIN_Y) / (MOUSE_DIMENSION_Y / 100)) 84 85 #define TRACKPAD_DIMENSION_X (float)13000 86 #define TRACKPAD_MIN_X -2909 87 #define TRACKPAD_MAX_X 3167 88 #define TRACKPAD_RES_X \ 89 ((TRACKPAD_MAX_X - TRACKPAD_MIN_X) / (TRACKPAD_DIMENSION_X / 100)) 90 #define TRACKPAD_DIMENSION_Y (float)11000 91 #define TRACKPAD_MIN_Y -2456 92 #define TRACKPAD_MAX_Y 2565 93 #define TRACKPAD_RES_Y \ 94 ((TRACKPAD_MAX_Y - TRACKPAD_MIN_Y) / (TRACKPAD_DIMENSION_Y / 100)) 95 96 #define TRACKPAD2_DIMENSION_X (float)16000 97 #define TRACKPAD2_MIN_X -3678 98 #define TRACKPAD2_MAX_X 3934 99 #define TRACKPAD2_RES_X \ 100 ((TRACKPAD2_MAX_X - TRACKPAD2_MIN_X) / (TRACKPAD2_DIMENSION_X / 100)) 101 #define TRACKPAD2_DIMENSION_Y (float)11490 102 #define TRACKPAD2_MIN_Y -2478 103 #define TRACKPAD2_MAX_Y 2587 104 #define TRACKPAD2_RES_Y \ 105 ((TRACKPAD2_MAX_Y - TRACKPAD2_MIN_Y) / (TRACKPAD2_DIMENSION_Y / 100)) 106 107 /** 108 * struct magicmouse_sc - Tracks Magic Mouse-specific data. 109 * @input: Input device through which we report events. 110 * @quirks: Currently unused. 111 * @ntouches: Number of touches in most recent touch report. 112 * @scroll_accel: Number of consecutive scroll motions. 113 * @scroll_jiffies: Time of last scroll motion. 114 * @touches: Most recent data for a touch, indexed by tracking ID. 115 * @tracking_ids: Mapping of current touch input data to @touches. 116 */ 117 struct magicmouse_sc { 118 struct input_dev *input; 119 unsigned long quirks; 120 121 int ntouches; 122 int scroll_accel; 123 unsigned long scroll_jiffies; 124 125 struct { 126 short x; 127 short y; 128 short scroll_x; 129 short scroll_y; 130 u8 size; 131 } touches[16]; 132 int tracking_ids[16]; 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 int pressure = 0; 200 201 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 202 id = (tdata[6] << 2 | tdata[5] >> 6) & 0xf; 203 x = (tdata[1] << 28 | tdata[0] << 20) >> 20; 204 y = -((tdata[2] << 24 | tdata[1] << 16) >> 20); 205 size = tdata[5] & 0x3f; 206 orientation = (tdata[6] >> 2) - 32; 207 touch_major = tdata[3]; 208 touch_minor = tdata[4]; 209 state = tdata[7] & TOUCH_STATE_MASK; 210 down = state != TOUCH_STATE_NONE; 211 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 212 id = tdata[8] & 0xf; 213 x = (tdata[1] << 27 | tdata[0] << 19) >> 19; 214 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); 215 size = tdata[6]; 216 orientation = (tdata[8] >> 5) - 4; 217 touch_major = tdata[4]; 218 touch_minor = tdata[5]; 219 pressure = tdata[7]; 220 state = tdata[3] & 0xC0; 221 down = state == 0x80; 222 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 223 id = (tdata[7] << 2 | tdata[6] >> 6) & 0xf; 224 x = (tdata[1] << 27 | tdata[0] << 19) >> 19; 225 y = -((tdata[3] << 30 | tdata[2] << 22 | tdata[1] << 14) >> 19); 226 size = tdata[6] & 0x3f; 227 orientation = (tdata[7] >> 2) - 32; 228 touch_major = tdata[4]; 229 touch_minor = tdata[5]; 230 state = tdata[8] & TOUCH_STATE_MASK; 231 down = state != TOUCH_STATE_NONE; 232 } 233 234 /* Store tracking ID and other fields. */ 235 msc->tracking_ids[raw_id] = id; 236 msc->touches[id].x = x; 237 msc->touches[id].y = y; 238 msc->touches[id].size = size; 239 240 /* If requested, emulate a scroll wheel by detecting small 241 * vertical touch motions. 242 */ 243 if (emulate_scroll_wheel && (input->id.product != 244 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2)) { 245 unsigned long now = jiffies; 246 int step_x = msc->touches[id].scroll_x - x; 247 int step_y = msc->touches[id].scroll_y - y; 248 249 /* Calculate and apply the scroll motion. */ 250 switch (state) { 251 case TOUCH_STATE_START: 252 msc->touches[id].scroll_x = x; 253 msc->touches[id].scroll_y = y; 254 255 /* Reset acceleration after half a second. */ 256 if (scroll_acceleration && time_before(now, 257 msc->scroll_jiffies + HZ / 2)) 258 msc->scroll_accel = max_t(int, 259 msc->scroll_accel - 1, 1); 260 else 261 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 262 263 break; 264 case TOUCH_STATE_DRAG: 265 step_x /= (64 - (int)scroll_speed) * msc->scroll_accel; 266 if (step_x != 0) { 267 msc->touches[id].scroll_x -= step_x * 268 (64 - scroll_speed) * msc->scroll_accel; 269 msc->scroll_jiffies = now; 270 input_report_rel(input, REL_HWHEEL, -step_x); 271 } 272 273 step_y /= (64 - (int)scroll_speed) * msc->scroll_accel; 274 if (step_y != 0) { 275 msc->touches[id].scroll_y -= step_y * 276 (64 - scroll_speed) * msc->scroll_accel; 277 msc->scroll_jiffies = now; 278 input_report_rel(input, REL_WHEEL, step_y); 279 } 280 break; 281 } 282 } 283 284 if (down) 285 msc->ntouches++; 286 287 input_mt_slot(input, id); 288 input_mt_report_slot_state(input, MT_TOOL_FINGER, down); 289 290 /* Generate the input events for this touch. */ 291 if (down) { 292 input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2); 293 input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2); 294 input_report_abs(input, ABS_MT_ORIENTATION, -orientation); 295 input_report_abs(input, ABS_MT_POSITION_X, x); 296 input_report_abs(input, ABS_MT_POSITION_Y, y); 297 298 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) 299 input_report_abs(input, ABS_MT_PRESSURE, pressure); 300 301 if (report_undeciphered) { 302 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) 303 input_event(input, EV_MSC, MSC_RAW, tdata[7]); 304 else if (input->id.product != 305 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) 306 input_event(input, EV_MSC, MSC_RAW, tdata[8]); 307 } 308 } 309 } 310 311 static int magicmouse_raw_event(struct hid_device *hdev, 312 struct hid_report *report, u8 *data, int size) 313 { 314 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 315 struct input_dev *input = msc->input; 316 int x = 0, y = 0, ii, clicks = 0, npoints; 317 318 switch (data[0]) { 319 case TRACKPAD_REPORT_ID: 320 case TRACKPAD2_BT_REPORT_ID: 321 /* Expect four bytes of prefix, and N*9 bytes of touch data. */ 322 if (size < 4 || ((size - 4) % 9) != 0) 323 return 0; 324 npoints = (size - 4) / 9; 325 if (npoints > 15) { 326 hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n", 327 size); 328 return 0; 329 } 330 msc->ntouches = 0; 331 for (ii = 0; ii < npoints; ii++) 332 magicmouse_emit_touch(msc, ii, data + ii * 9 + 4); 333 334 clicks = data[1]; 335 336 /* The following bits provide a device specific timestamp. They 337 * are unused here. 338 * 339 * ts = data[1] >> 6 | data[2] << 2 | data[3] << 10; 340 */ 341 break; 342 case TRACKPAD2_USB_REPORT_ID: 343 /* Expect twelve bytes of prefix and N*9 bytes of touch data. */ 344 if (size < 12 || ((size - 12) % 9) != 0) 345 return 0; 346 npoints = (size - 12) / 9; 347 if (npoints > 15) { 348 hid_warn(hdev, "invalid size value (%d) for TRACKPAD2_USB_REPORT_ID\n", 349 size); 350 return 0; 351 } 352 msc->ntouches = 0; 353 for (ii = 0; ii < npoints; ii++) 354 magicmouse_emit_touch(msc, ii, data + ii * 9 + 12); 355 356 clicks = data[1]; 357 break; 358 case MOUSE_REPORT_ID: 359 /* Expect six bytes of prefix, and N*8 bytes of touch data. */ 360 if (size < 6 || ((size - 6) % 8) != 0) 361 return 0; 362 npoints = (size - 6) / 8; 363 if (npoints > 15) { 364 hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n", 365 size); 366 return 0; 367 } 368 msc->ntouches = 0; 369 for (ii = 0; ii < npoints; ii++) 370 magicmouse_emit_touch(msc, ii, data + ii * 8 + 6); 371 372 /* When emulating three-button mode, it is important 373 * to have the current touch information before 374 * generating a click event. 375 */ 376 x = (int)(((data[3] & 0x0c) << 28) | (data[1] << 22)) >> 22; 377 y = (int)(((data[3] & 0x30) << 26) | (data[2] << 22)) >> 22; 378 clicks = data[3]; 379 380 /* The following bits provide a device specific timestamp. They 381 * are unused here. 382 * 383 * ts = data[3] >> 6 | data[4] << 2 | data[5] << 10; 384 */ 385 break; 386 case DOUBLE_REPORT_ID: 387 /* Sometimes the trackpad sends two touch reports in one 388 * packet. 389 */ 390 magicmouse_raw_event(hdev, report, data + 2, data[1]); 391 magicmouse_raw_event(hdev, report, data + 2 + data[1], 392 size - 2 - data[1]); 393 break; 394 default: 395 return 0; 396 } 397 398 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 399 magicmouse_emit_buttons(msc, clicks & 3); 400 input_report_rel(input, REL_X, x); 401 input_report_rel(input, REL_Y, y); 402 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 403 input_mt_sync_frame(input); 404 input_report_key(input, BTN_MOUSE, clicks & 1); 405 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 406 input_report_key(input, BTN_MOUSE, clicks & 1); 407 input_mt_report_pointer_emulation(input, true); 408 } 409 410 input_sync(input); 411 return 1; 412 } 413 414 static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hdev) 415 { 416 int error; 417 int mt_flags = 0; 418 419 __set_bit(EV_KEY, input->evbit); 420 421 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 422 __set_bit(BTN_LEFT, input->keybit); 423 __set_bit(BTN_RIGHT, input->keybit); 424 if (emulate_3button) 425 __set_bit(BTN_MIDDLE, input->keybit); 426 427 __set_bit(EV_REL, input->evbit); 428 __set_bit(REL_X, input->relbit); 429 __set_bit(REL_Y, input->relbit); 430 if (emulate_scroll_wheel) { 431 __set_bit(REL_WHEEL, input->relbit); 432 __set_bit(REL_HWHEEL, input->relbit); 433 } 434 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 435 /* setting the device name to ensure the same driver settings 436 * get loaded, whether connected through bluetooth or USB 437 */ 438 input->name = "Apple Inc. Magic Trackpad 2"; 439 440 __clear_bit(EV_MSC, input->evbit); 441 __clear_bit(BTN_0, input->keybit); 442 __clear_bit(BTN_RIGHT, input->keybit); 443 __clear_bit(BTN_MIDDLE, input->keybit); 444 __set_bit(BTN_MOUSE, input->keybit); 445 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 446 __set_bit(BTN_TOOL_FINGER, input->keybit); 447 448 mt_flags = INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 449 INPUT_MT_TRACK; 450 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 451 /* input->keybit is initialized with incorrect button info 452 * for Magic Trackpad. There really is only one physical 453 * button (BTN_LEFT == BTN_MOUSE). Make sure we don't 454 * advertise buttons that don't exist... 455 */ 456 __clear_bit(BTN_RIGHT, input->keybit); 457 __clear_bit(BTN_MIDDLE, input->keybit); 458 __set_bit(BTN_MOUSE, input->keybit); 459 __set_bit(BTN_TOOL_FINGER, input->keybit); 460 __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); 461 __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); 462 __set_bit(BTN_TOOL_QUADTAP, input->keybit); 463 __set_bit(BTN_TOOL_QUINTTAP, input->keybit); 464 __set_bit(BTN_TOUCH, input->keybit); 465 __set_bit(INPUT_PROP_POINTER, input->propbit); 466 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 467 } 468 469 470 __set_bit(EV_ABS, input->evbit); 471 472 error = input_mt_init_slots(input, 16, mt_flags); 473 if (error) 474 return error; 475 input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255 << 2, 476 4, 0); 477 input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255 << 2, 478 4, 0); 479 480 /* Note: Touch Y position from the device is inverted relative 481 * to how pointer motion is reported (and relative to how USB 482 * HID recommends the coordinates work). This driver keeps 483 * the origin at the same position, and just uses the additive 484 * inverse of the reported Y. 485 */ 486 if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) { 487 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); 488 input_set_abs_params(input, ABS_MT_POSITION_X, 489 MOUSE_MIN_X, MOUSE_MAX_X, 4, 0); 490 input_set_abs_params(input, ABS_MT_POSITION_Y, 491 MOUSE_MIN_Y, MOUSE_MAX_Y, 4, 0); 492 493 input_abs_set_res(input, ABS_MT_POSITION_X, 494 MOUSE_RES_X); 495 input_abs_set_res(input, ABS_MT_POSITION_Y, 496 MOUSE_RES_Y); 497 } else if (input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 498 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 253, 0, 0); 499 input_set_abs_params(input, ABS_PRESSURE, 0, 253, 0, 0); 500 input_set_abs_params(input, ABS_MT_ORIENTATION, -3, 4, 0, 0); 501 input_set_abs_params(input, ABS_X, TRACKPAD2_MIN_X, 502 TRACKPAD2_MAX_X, 0, 0); 503 input_set_abs_params(input, ABS_Y, TRACKPAD2_MIN_Y, 504 TRACKPAD2_MAX_Y, 0, 0); 505 input_set_abs_params(input, ABS_MT_POSITION_X, 506 TRACKPAD2_MIN_X, TRACKPAD2_MAX_X, 0, 0); 507 input_set_abs_params(input, ABS_MT_POSITION_Y, 508 TRACKPAD2_MIN_Y, TRACKPAD2_MAX_Y, 0, 0); 509 510 input_abs_set_res(input, ABS_X, TRACKPAD2_RES_X); 511 input_abs_set_res(input, ABS_Y, TRACKPAD2_RES_Y); 512 input_abs_set_res(input, ABS_MT_POSITION_X, TRACKPAD2_RES_X); 513 input_abs_set_res(input, ABS_MT_POSITION_Y, TRACKPAD2_RES_Y); 514 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 515 input_set_abs_params(input, ABS_MT_ORIENTATION, -31, 32, 1, 0); 516 input_set_abs_params(input, ABS_X, TRACKPAD_MIN_X, 517 TRACKPAD_MAX_X, 4, 0); 518 input_set_abs_params(input, ABS_Y, TRACKPAD_MIN_Y, 519 TRACKPAD_MAX_Y, 4, 0); 520 input_set_abs_params(input, ABS_MT_POSITION_X, 521 TRACKPAD_MIN_X, TRACKPAD_MAX_X, 4, 0); 522 input_set_abs_params(input, ABS_MT_POSITION_Y, 523 TRACKPAD_MIN_Y, TRACKPAD_MAX_Y, 4, 0); 524 525 input_abs_set_res(input, ABS_X, TRACKPAD_RES_X); 526 input_abs_set_res(input, ABS_Y, TRACKPAD_RES_Y); 527 input_abs_set_res(input, ABS_MT_POSITION_X, 528 TRACKPAD_RES_X); 529 input_abs_set_res(input, ABS_MT_POSITION_Y, 530 TRACKPAD_RES_Y); 531 } 532 533 input_set_events_per_packet(input, 60); 534 535 if (report_undeciphered && 536 input->id.product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 537 __set_bit(EV_MSC, input->evbit); 538 __set_bit(MSC_RAW, input->mscbit); 539 } 540 541 return 0; 542 } 543 544 static int magicmouse_input_mapping(struct hid_device *hdev, 545 struct hid_input *hi, struct hid_field *field, 546 struct hid_usage *usage, unsigned long **bit, int *max) 547 { 548 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 549 550 if (!msc->input) 551 msc->input = hi->input; 552 553 /* Magic Trackpad does not give relative data after switching to MT */ 554 if ((hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD || 555 hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) && 556 field->flags & HID_MAIN_ITEM_RELATIVE) 557 return -1; 558 559 return 0; 560 } 561 562 static int magicmouse_input_configured(struct hid_device *hdev, 563 struct hid_input *hi) 564 565 { 566 struct magicmouse_sc *msc = hid_get_drvdata(hdev); 567 int ret; 568 569 ret = magicmouse_setup_input(msc->input, hdev); 570 if (ret) { 571 hid_err(hdev, "magicmouse setup input failed (%d)\n", ret); 572 /* clean msc->input to notify probe() of the failure */ 573 msc->input = NULL; 574 return ret; 575 } 576 577 return 0; 578 } 579 580 581 static int magicmouse_probe(struct hid_device *hdev, 582 const struct hid_device_id *id) 583 { 584 const u8 *feature; 585 const u8 feature_mt[] = { 0xD7, 0x01 }; 586 const u8 feature_mt_trackpad2_usb[] = { 0x02, 0x01 }; 587 const u8 feature_mt_trackpad2_bt[] = { 0xF1, 0x02, 0x01 }; 588 u8 *buf; 589 struct magicmouse_sc *msc; 590 struct hid_report *report; 591 int ret; 592 int feature_size; 593 594 if (id->vendor == USB_VENDOR_ID_APPLE && 595 id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2 && 596 hdev->type != HID_TYPE_USBMOUSE) 597 return 0; 598 599 msc = devm_kzalloc(&hdev->dev, sizeof(*msc), GFP_KERNEL); 600 if (msc == NULL) { 601 hid_err(hdev, "can't alloc magicmouse descriptor\n"); 602 return -ENOMEM; 603 } 604 605 msc->scroll_accel = SCROLL_ACCEL_DEFAULT; 606 607 msc->quirks = id->driver_data; 608 hid_set_drvdata(hdev, msc); 609 610 ret = hid_parse(hdev); 611 if (ret) { 612 hid_err(hdev, "magicmouse hid parse failed\n"); 613 return ret; 614 } 615 616 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 617 if (ret) { 618 hid_err(hdev, "magicmouse hw start failed\n"); 619 return ret; 620 } 621 622 if (!msc->input) { 623 hid_err(hdev, "magicmouse input not registered\n"); 624 ret = -ENOMEM; 625 goto err_stop_hw; 626 } 627 628 if (id->product == USB_DEVICE_ID_APPLE_MAGICMOUSE) 629 report = hid_register_report(hdev, HID_INPUT_REPORT, 630 MOUSE_REPORT_ID, 0); 631 else if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 632 if (id->vendor == BT_VENDOR_ID_APPLE) 633 report = hid_register_report(hdev, HID_INPUT_REPORT, 634 TRACKPAD2_BT_REPORT_ID, 0); 635 else /* USB_VENDOR_ID_APPLE */ 636 report = hid_register_report(hdev, HID_INPUT_REPORT, 637 TRACKPAD2_USB_REPORT_ID, 0); 638 } else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */ 639 report = hid_register_report(hdev, HID_INPUT_REPORT, 640 TRACKPAD_REPORT_ID, 0); 641 report = hid_register_report(hdev, HID_INPUT_REPORT, 642 DOUBLE_REPORT_ID, 0); 643 } 644 645 if (!report) { 646 hid_err(hdev, "unable to register touch report\n"); 647 ret = -ENOMEM; 648 goto err_stop_hw; 649 } 650 report->size = 6; 651 652 if (id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2) { 653 if (id->vendor == BT_VENDOR_ID_APPLE) { 654 feature_size = sizeof(feature_mt_trackpad2_bt); 655 feature = feature_mt_trackpad2_bt; 656 } else { /* USB_VENDOR_ID_APPLE */ 657 feature_size = sizeof(feature_mt_trackpad2_usb); 658 feature = feature_mt_trackpad2_usb; 659 } 660 } else { 661 feature_size = sizeof(feature_mt); 662 feature = feature_mt; 663 } 664 665 buf = kmemdup(feature, feature_size, GFP_KERNEL); 666 if (!buf) { 667 ret = -ENOMEM; 668 goto err_stop_hw; 669 } 670 671 /* 672 * Some devices repond with 'invalid report id' when feature 673 * report switching it into multitouch mode is sent to it. 674 * 675 * This results in -EIO from the _raw low-level transport callback, 676 * but there seems to be no other way of switching the mode. 677 * Thus the super-ugly hacky success check below. 678 */ 679 ret = hid_hw_raw_request(hdev, buf[0], buf, feature_size, 680 HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 681 kfree(buf); 682 if (ret != -EIO && ret != feature_size) { 683 hid_err(hdev, "unable to request touch data (%d)\n", ret); 684 goto err_stop_hw; 685 } 686 687 return 0; 688 err_stop_hw: 689 hid_hw_stop(hdev); 690 return ret; 691 } 692 693 static const struct hid_device_id magic_mice[] = { 694 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 695 USB_DEVICE_ID_APPLE_MAGICMOUSE), .driver_data = 0 }, 696 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 697 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), .driver_data = 0 }, 698 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 699 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 }, 700 { HID_USB_DEVICE(USB_VENDOR_ID_APPLE, 701 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2), .driver_data = 0 }, 702 { } 703 }; 704 MODULE_DEVICE_TABLE(hid, magic_mice); 705 706 static struct hid_driver magicmouse_driver = { 707 .name = "magicmouse", 708 .id_table = magic_mice, 709 .probe = magicmouse_probe, 710 .raw_event = magicmouse_raw_event, 711 .input_mapping = magicmouse_input_mapping, 712 .input_configured = magicmouse_input_configured, 713 }; 714 module_hid_driver(magicmouse_driver); 715 716 MODULE_LICENSE("GPL"); 717