1 /* 2 * Elantech Touchpad driver (v6) 3 * 4 * Copyright (C) 2007-2009 Arjan Opmeer <arjan@opmeer.net> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 as published 8 * by the Free Software Foundation. 9 * 10 * Trademarks are the property of their respective owners. 11 */ 12 13 #include <linux/delay.h> 14 #include <linux/dmi.h> 15 #include <linux/slab.h> 16 #include <linux/module.h> 17 #include <linux/i2c.h> 18 #include <linux/input.h> 19 #include <linux/input/mt.h> 20 #include <linux/platform_device.h> 21 #include <linux/serio.h> 22 #include <linux/libps2.h> 23 #include <asm/unaligned.h> 24 #include "psmouse.h" 25 #include "elantech.h" 26 #include "elan_i2c.h" 27 28 #define elantech_debug(fmt, ...) \ 29 do { \ 30 if (etd->info.debug) \ 31 psmouse_printk(KERN_DEBUG, psmouse, \ 32 fmt, ##__VA_ARGS__); \ 33 } while (0) 34 35 /* 36 * Send a Synaptics style sliced query command 37 */ 38 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, 39 unsigned char *param) 40 { 41 if (ps2_sliced_command(&psmouse->ps2dev, c) || 42 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { 43 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); 44 return -1; 45 } 46 47 return 0; 48 } 49 50 /* 51 * V3 and later support this fast command 52 */ 53 static int elantech_send_cmd(struct psmouse *psmouse, unsigned char c, 54 unsigned char *param) 55 { 56 struct ps2dev *ps2dev = &psmouse->ps2dev; 57 58 if (ps2_command(ps2dev, NULL, ETP_PS2_CUSTOM_COMMAND) || 59 ps2_command(ps2dev, NULL, c) || 60 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { 61 psmouse_err(psmouse, "%s query 0x%02x failed.\n", __func__, c); 62 return -1; 63 } 64 65 return 0; 66 } 67 68 /* 69 * A retrying version of ps2_command 70 */ 71 static int elantech_ps2_command(struct psmouse *psmouse, 72 unsigned char *param, int command) 73 { 74 struct ps2dev *ps2dev = &psmouse->ps2dev; 75 struct elantech_data *etd = psmouse->private; 76 int rc; 77 int tries = ETP_PS2_COMMAND_TRIES; 78 79 do { 80 rc = ps2_command(ps2dev, param, command); 81 if (rc == 0) 82 break; 83 tries--; 84 elantech_debug("retrying ps2 command 0x%02x (%d).\n", 85 command, tries); 86 msleep(ETP_PS2_COMMAND_DELAY); 87 } while (tries > 0); 88 89 if (rc) 90 psmouse_err(psmouse, "ps2 command 0x%02x failed.\n", command); 91 92 return rc; 93 } 94 95 /* 96 * Send an Elantech style special command to read a value from a register 97 */ 98 static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, 99 unsigned char *val) 100 { 101 struct elantech_data *etd = psmouse->private; 102 unsigned char param[3]; 103 int rc = 0; 104 105 if (reg < 0x07 || reg > 0x26) 106 return -1; 107 108 if (reg > 0x11 && reg < 0x20) 109 return -1; 110 111 switch (etd->info.hw_version) { 112 case 1: 113 if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_READ) || 114 ps2_sliced_command(&psmouse->ps2dev, reg) || 115 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) { 116 rc = -1; 117 } 118 break; 119 120 case 2: 121 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 122 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READ) || 123 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 124 elantech_ps2_command(psmouse, NULL, reg) || 125 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { 126 rc = -1; 127 } 128 break; 129 130 case 3 ... 4: 131 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 132 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || 133 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 134 elantech_ps2_command(psmouse, NULL, reg) || 135 elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { 136 rc = -1; 137 } 138 break; 139 } 140 141 if (rc) 142 psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg); 143 else if (etd->info.hw_version != 4) 144 *val = param[0]; 145 else 146 *val = param[1]; 147 148 return rc; 149 } 150 151 /* 152 * Send an Elantech style special command to write a register with a value 153 */ 154 static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, 155 unsigned char val) 156 { 157 struct elantech_data *etd = psmouse->private; 158 int rc = 0; 159 160 if (reg < 0x07 || reg > 0x26) 161 return -1; 162 163 if (reg > 0x11 && reg < 0x20) 164 return -1; 165 166 switch (etd->info.hw_version) { 167 case 1: 168 if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_WRITE) || 169 ps2_sliced_command(&psmouse->ps2dev, reg) || 170 ps2_sliced_command(&psmouse->ps2dev, val) || 171 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) { 172 rc = -1; 173 } 174 break; 175 176 case 2: 177 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 178 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_WRITE) || 179 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 180 elantech_ps2_command(psmouse, NULL, reg) || 181 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 182 elantech_ps2_command(psmouse, NULL, val) || 183 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { 184 rc = -1; 185 } 186 break; 187 188 case 3: 189 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 190 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || 191 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 192 elantech_ps2_command(psmouse, NULL, reg) || 193 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 194 elantech_ps2_command(psmouse, NULL, val) || 195 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { 196 rc = -1; 197 } 198 break; 199 200 case 4: 201 if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 202 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || 203 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 204 elantech_ps2_command(psmouse, NULL, reg) || 205 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 206 elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || 207 elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || 208 elantech_ps2_command(psmouse, NULL, val) || 209 elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { 210 rc = -1; 211 } 212 break; 213 } 214 215 if (rc) 216 psmouse_err(psmouse, 217 "failed to write register 0x%02x with value 0x%02x.\n", 218 reg, val); 219 220 return rc; 221 } 222 223 /* 224 * Dump a complete mouse movement packet to the syslog 225 */ 226 static void elantech_packet_dump(struct psmouse *psmouse) 227 { 228 psmouse_printk(KERN_DEBUG, psmouse, "PS/2 packet [%*ph]\n", 229 psmouse->pktsize, psmouse->packet); 230 } 231 232 /* 233 * Interpret complete data packets and report absolute mode input events for 234 * hardware version 1. (4 byte packets) 235 */ 236 static void elantech_report_absolute_v1(struct psmouse *psmouse) 237 { 238 struct input_dev *dev = psmouse->dev; 239 struct elantech_data *etd = psmouse->private; 240 unsigned char *packet = psmouse->packet; 241 int fingers; 242 243 if (etd->info.fw_version < 0x020000) { 244 /* 245 * byte 0: D U p1 p2 1 p3 R L 246 * byte 1: f 0 th tw x9 x8 y9 y8 247 */ 248 fingers = ((packet[1] & 0x80) >> 7) + 249 ((packet[1] & 0x30) >> 4); 250 } else { 251 /* 252 * byte 0: n1 n0 p2 p1 1 p3 R L 253 * byte 1: 0 0 0 0 x9 x8 y9 y8 254 */ 255 fingers = (packet[0] & 0xc0) >> 6; 256 } 257 258 if (etd->info.jumpy_cursor) { 259 if (fingers != 1) { 260 etd->single_finger_reports = 0; 261 } else if (etd->single_finger_reports < 2) { 262 /* Discard first 2 reports of one finger, bogus */ 263 etd->single_finger_reports++; 264 elantech_debug("discarding packet\n"); 265 return; 266 } 267 } 268 269 input_report_key(dev, BTN_TOUCH, fingers != 0); 270 271 /* 272 * byte 2: x7 x6 x5 x4 x3 x2 x1 x0 273 * byte 3: y7 y6 y5 y4 y3 y2 y1 y0 274 */ 275 if (fingers) { 276 input_report_abs(dev, ABS_X, 277 ((packet[1] & 0x0c) << 6) | packet[2]); 278 input_report_abs(dev, ABS_Y, 279 etd->y_max - (((packet[1] & 0x03) << 8) | packet[3])); 280 } 281 282 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); 283 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); 284 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); 285 286 psmouse_report_standard_buttons(dev, packet[0]); 287 288 if (etd->info.fw_version < 0x020000 && 289 (etd->info.capabilities[0] & ETP_CAP_HAS_ROCKER)) { 290 /* rocker up */ 291 input_report_key(dev, BTN_FORWARD, packet[0] & 0x40); 292 /* rocker down */ 293 input_report_key(dev, BTN_BACK, packet[0] & 0x80); 294 } 295 296 input_sync(dev); 297 } 298 299 static void elantech_set_slot(struct input_dev *dev, int slot, bool active, 300 unsigned int x, unsigned int y) 301 { 302 input_mt_slot(dev, slot); 303 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 304 if (active) { 305 input_report_abs(dev, ABS_MT_POSITION_X, x); 306 input_report_abs(dev, ABS_MT_POSITION_Y, y); 307 } 308 } 309 310 /* x1 < x2 and y1 < y2 when two fingers, x = y = 0 when not pressed */ 311 static void elantech_report_semi_mt_data(struct input_dev *dev, 312 unsigned int num_fingers, 313 unsigned int x1, unsigned int y1, 314 unsigned int x2, unsigned int y2) 315 { 316 elantech_set_slot(dev, 0, num_fingers != 0, x1, y1); 317 elantech_set_slot(dev, 1, num_fingers >= 2, x2, y2); 318 } 319 320 /* 321 * Interpret complete data packets and report absolute mode input events for 322 * hardware version 2. (6 byte packets) 323 */ 324 static void elantech_report_absolute_v2(struct psmouse *psmouse) 325 { 326 struct elantech_data *etd = psmouse->private; 327 struct input_dev *dev = psmouse->dev; 328 unsigned char *packet = psmouse->packet; 329 unsigned int fingers, x1 = 0, y1 = 0, x2 = 0, y2 = 0; 330 unsigned int width = 0, pres = 0; 331 332 /* byte 0: n1 n0 . . . . R L */ 333 fingers = (packet[0] & 0xc0) >> 6; 334 335 switch (fingers) { 336 case 3: 337 /* 338 * Same as one finger, except report of more than 3 fingers: 339 * byte 3: n4 . w1 w0 . . . . 340 */ 341 if (packet[3] & 0x80) 342 fingers = 4; 343 /* fall through */ 344 case 1: 345 /* 346 * byte 1: . . . . x11 x10 x9 x8 347 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 348 */ 349 x1 = ((packet[1] & 0x0f) << 8) | packet[2]; 350 /* 351 * byte 4: . . . . y11 y10 y9 y8 352 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 353 */ 354 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); 355 356 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); 357 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); 358 break; 359 360 case 2: 361 /* 362 * The coordinate of each finger is reported separately 363 * with a lower resolution for two finger touches: 364 * byte 0: . . ay8 ax8 . . . . 365 * byte 1: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 366 */ 367 x1 = (((packet[0] & 0x10) << 4) | packet[1]) << 2; 368 /* byte 2: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 */ 369 y1 = etd->y_max - 370 ((((packet[0] & 0x20) << 3) | packet[2]) << 2); 371 /* 372 * byte 3: . . by8 bx8 . . . . 373 * byte 4: bx7 bx6 bx5 bx4 bx3 bx2 bx1 bx0 374 */ 375 x2 = (((packet[3] & 0x10) << 4) | packet[4]) << 2; 376 /* byte 5: by7 by8 by5 by4 by3 by2 by1 by0 */ 377 y2 = etd->y_max - 378 ((((packet[3] & 0x20) << 3) | packet[5]) << 2); 379 380 /* Unknown so just report sensible values */ 381 pres = 127; 382 width = 7; 383 break; 384 } 385 386 input_report_key(dev, BTN_TOUCH, fingers != 0); 387 if (fingers != 0) { 388 input_report_abs(dev, ABS_X, x1); 389 input_report_abs(dev, ABS_Y, y1); 390 } 391 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); 392 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); 393 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); 394 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); 395 input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4); 396 psmouse_report_standard_buttons(dev, packet[0]); 397 if (etd->info.reports_pressure) { 398 input_report_abs(dev, ABS_PRESSURE, pres); 399 input_report_abs(dev, ABS_TOOL_WIDTH, width); 400 } 401 402 input_sync(dev); 403 } 404 405 static void elantech_report_trackpoint(struct psmouse *psmouse, 406 int packet_type) 407 { 408 /* 409 * byte 0: 0 0 sx sy 0 M R L 410 * byte 1:~sx 0 0 0 0 0 0 0 411 * byte 2:~sy 0 0 0 0 0 0 0 412 * byte 3: 0 0 ~sy ~sx 0 1 1 0 413 * byte 4: x7 x6 x5 x4 x3 x2 x1 x0 414 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 415 * 416 * x and y are written in two's complement spread 417 * over 9 bits with sx/sy the relative top bit and 418 * x7..x0 and y7..y0 the lower bits. 419 * The sign of y is opposite to what the input driver 420 * expects for a relative movement 421 */ 422 423 struct elantech_data *etd = psmouse->private; 424 struct input_dev *tp_dev = etd->tp_dev; 425 unsigned char *packet = psmouse->packet; 426 int x, y; 427 u32 t; 428 429 t = get_unaligned_le32(&packet[0]); 430 431 switch (t & ~7U) { 432 case 0x06000030U: 433 case 0x16008020U: 434 case 0x26800010U: 435 case 0x36808000U: 436 x = packet[4] - (int)((packet[1]^0x80) << 1); 437 y = (int)((packet[2]^0x80) << 1) - packet[5]; 438 439 psmouse_report_standard_buttons(tp_dev, packet[0]); 440 441 input_report_rel(tp_dev, REL_X, x); 442 input_report_rel(tp_dev, REL_Y, y); 443 444 input_sync(tp_dev); 445 446 break; 447 448 default: 449 /* Dump unexpected packet sequences if debug=1 (default) */ 450 if (etd->info.debug == 1) 451 elantech_packet_dump(psmouse); 452 453 break; 454 } 455 } 456 457 /* 458 * Interpret complete data packets and report absolute mode input events for 459 * hardware version 3. (12 byte packets for two fingers) 460 */ 461 static void elantech_report_absolute_v3(struct psmouse *psmouse, 462 int packet_type) 463 { 464 struct input_dev *dev = psmouse->dev; 465 struct elantech_data *etd = psmouse->private; 466 unsigned char *packet = psmouse->packet; 467 unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; 468 unsigned int width = 0, pres = 0; 469 470 /* byte 0: n1 n0 . . . . R L */ 471 fingers = (packet[0] & 0xc0) >> 6; 472 473 switch (fingers) { 474 case 3: 475 case 1: 476 /* 477 * byte 1: . . . . x11 x10 x9 x8 478 * byte 2: x7 x6 x5 x4 x4 x2 x1 x0 479 */ 480 x1 = ((packet[1] & 0x0f) << 8) | packet[2]; 481 /* 482 * byte 4: . . . . y11 y10 y9 y8 483 * byte 5: y7 y6 y5 y4 y3 y2 y1 y0 484 */ 485 y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); 486 break; 487 488 case 2: 489 if (packet_type == PACKET_V3_HEAD) { 490 /* 491 * byte 1: . . . . ax11 ax10 ax9 ax8 492 * byte 2: ax7 ax6 ax5 ax4 ax3 ax2 ax1 ax0 493 */ 494 etd->mt[0].x = ((packet[1] & 0x0f) << 8) | packet[2]; 495 /* 496 * byte 4: . . . . ay11 ay10 ay9 ay8 497 * byte 5: ay7 ay6 ay5 ay4 ay3 ay2 ay1 ay0 498 */ 499 etd->mt[0].y = etd->y_max - 500 (((packet[4] & 0x0f) << 8) | packet[5]); 501 /* 502 * wait for next packet 503 */ 504 return; 505 } 506 507 /* packet_type == PACKET_V3_TAIL */ 508 x1 = etd->mt[0].x; 509 y1 = etd->mt[0].y; 510 x2 = ((packet[1] & 0x0f) << 8) | packet[2]; 511 y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); 512 break; 513 } 514 515 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); 516 width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); 517 518 input_report_key(dev, BTN_TOUCH, fingers != 0); 519 if (fingers != 0) { 520 input_report_abs(dev, ABS_X, x1); 521 input_report_abs(dev, ABS_Y, y1); 522 } 523 elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); 524 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); 525 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); 526 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); 527 528 /* For clickpads map both buttons to BTN_LEFT */ 529 if (etd->info.fw_version & 0x001000) 530 input_report_key(dev, BTN_LEFT, packet[0] & 0x03); 531 else 532 psmouse_report_standard_buttons(dev, packet[0]); 533 534 input_report_abs(dev, ABS_PRESSURE, pres); 535 input_report_abs(dev, ABS_TOOL_WIDTH, width); 536 537 input_sync(dev); 538 } 539 540 static void elantech_input_sync_v4(struct psmouse *psmouse) 541 { 542 struct input_dev *dev = psmouse->dev; 543 struct elantech_data *etd = psmouse->private; 544 unsigned char *packet = psmouse->packet; 545 546 /* For clickpads map both buttons to BTN_LEFT */ 547 if (etd->info.fw_version & 0x001000) 548 input_report_key(dev, BTN_LEFT, packet[0] & 0x03); 549 else 550 psmouse_report_standard_buttons(dev, packet[0]); 551 552 input_mt_report_pointer_emulation(dev, true); 553 input_sync(dev); 554 } 555 556 static void process_packet_status_v4(struct psmouse *psmouse) 557 { 558 struct input_dev *dev = psmouse->dev; 559 unsigned char *packet = psmouse->packet; 560 unsigned fingers; 561 int i; 562 563 /* notify finger state change */ 564 fingers = packet[1] & 0x1f; 565 for (i = 0; i < ETP_MAX_FINGERS; i++) { 566 if ((fingers & (1 << i)) == 0) { 567 input_mt_slot(dev, i); 568 input_mt_report_slot_state(dev, MT_TOOL_FINGER, false); 569 } 570 } 571 572 elantech_input_sync_v4(psmouse); 573 } 574 575 static void process_packet_head_v4(struct psmouse *psmouse) 576 { 577 struct input_dev *dev = psmouse->dev; 578 struct elantech_data *etd = psmouse->private; 579 unsigned char *packet = psmouse->packet; 580 int id = ((packet[3] & 0xe0) >> 5) - 1; 581 int pres, traces; 582 583 if (id < 0) 584 return; 585 586 etd->mt[id].x = ((packet[1] & 0x0f) << 8) | packet[2]; 587 etd->mt[id].y = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); 588 pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); 589 traces = (packet[0] & 0xf0) >> 4; 590 591 input_mt_slot(dev, id); 592 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 593 594 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); 595 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); 596 input_report_abs(dev, ABS_MT_PRESSURE, pres); 597 input_report_abs(dev, ABS_MT_TOUCH_MAJOR, traces * etd->width); 598 /* report this for backwards compatibility */ 599 input_report_abs(dev, ABS_TOOL_WIDTH, traces); 600 601 elantech_input_sync_v4(psmouse); 602 } 603 604 static void process_packet_motion_v4(struct psmouse *psmouse) 605 { 606 struct input_dev *dev = psmouse->dev; 607 struct elantech_data *etd = psmouse->private; 608 unsigned char *packet = psmouse->packet; 609 int weight, delta_x1 = 0, delta_y1 = 0, delta_x2 = 0, delta_y2 = 0; 610 int id, sid; 611 612 id = ((packet[0] & 0xe0) >> 5) - 1; 613 if (id < 0) 614 return; 615 616 sid = ((packet[3] & 0xe0) >> 5) - 1; 617 weight = (packet[0] & 0x10) ? ETP_WEIGHT_VALUE : 1; 618 /* 619 * Motion packets give us the delta of x, y values of specific fingers, 620 * but in two's complement. Let the compiler do the conversion for us. 621 * Also _enlarge_ the numbers to int, in case of overflow. 622 */ 623 delta_x1 = (signed char)packet[1]; 624 delta_y1 = (signed char)packet[2]; 625 delta_x2 = (signed char)packet[4]; 626 delta_y2 = (signed char)packet[5]; 627 628 etd->mt[id].x += delta_x1 * weight; 629 etd->mt[id].y -= delta_y1 * weight; 630 input_mt_slot(dev, id); 631 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[id].x); 632 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[id].y); 633 634 if (sid >= 0) { 635 etd->mt[sid].x += delta_x2 * weight; 636 etd->mt[sid].y -= delta_y2 * weight; 637 input_mt_slot(dev, sid); 638 input_report_abs(dev, ABS_MT_POSITION_X, etd->mt[sid].x); 639 input_report_abs(dev, ABS_MT_POSITION_Y, etd->mt[sid].y); 640 } 641 642 elantech_input_sync_v4(psmouse); 643 } 644 645 static void elantech_report_absolute_v4(struct psmouse *psmouse, 646 int packet_type) 647 { 648 switch (packet_type) { 649 case PACKET_V4_STATUS: 650 process_packet_status_v4(psmouse); 651 break; 652 653 case PACKET_V4_HEAD: 654 process_packet_head_v4(psmouse); 655 break; 656 657 case PACKET_V4_MOTION: 658 process_packet_motion_v4(psmouse); 659 break; 660 661 case PACKET_UNKNOWN: 662 default: 663 /* impossible to get here */ 664 break; 665 } 666 } 667 668 static int elantech_packet_check_v1(struct psmouse *psmouse) 669 { 670 struct elantech_data *etd = psmouse->private; 671 unsigned char *packet = psmouse->packet; 672 unsigned char p1, p2, p3; 673 674 /* Parity bits are placed differently */ 675 if (etd->info.fw_version < 0x020000) { 676 /* byte 0: D U p1 p2 1 p3 R L */ 677 p1 = (packet[0] & 0x20) >> 5; 678 p2 = (packet[0] & 0x10) >> 4; 679 } else { 680 /* byte 0: n1 n0 p2 p1 1 p3 R L */ 681 p1 = (packet[0] & 0x10) >> 4; 682 p2 = (packet[0] & 0x20) >> 5; 683 } 684 685 p3 = (packet[0] & 0x04) >> 2; 686 687 return etd->parity[packet[1]] == p1 && 688 etd->parity[packet[2]] == p2 && 689 etd->parity[packet[3]] == p3; 690 } 691 692 static int elantech_debounce_check_v2(struct psmouse *psmouse) 693 { 694 /* 695 * When we encounter packet that matches this exactly, it means the 696 * hardware is in debounce status. Just ignore the whole packet. 697 */ 698 static const u8 debounce_packet[] = { 699 0x84, 0xff, 0xff, 0x02, 0xff, 0xff 700 }; 701 unsigned char *packet = psmouse->packet; 702 703 return !memcmp(packet, debounce_packet, sizeof(debounce_packet)); 704 } 705 706 static int elantech_packet_check_v2(struct psmouse *psmouse) 707 { 708 struct elantech_data *etd = psmouse->private; 709 unsigned char *packet = psmouse->packet; 710 711 /* 712 * V2 hardware has two flavors. Older ones that do not report pressure, 713 * and newer ones that reports pressure and width. With newer ones, all 714 * packets (1, 2, 3 finger touch) have the same constant bits. With 715 * older ones, 1/3 finger touch packets and 2 finger touch packets 716 * have different constant bits. 717 * With all three cases, if the constant bits are not exactly what I 718 * expected, I consider them invalid. 719 */ 720 if (etd->info.reports_pressure) 721 return (packet[0] & 0x0c) == 0x04 && 722 (packet[3] & 0x0f) == 0x02; 723 724 if ((packet[0] & 0xc0) == 0x80) 725 return (packet[0] & 0x0c) == 0x0c && 726 (packet[3] & 0x0e) == 0x08; 727 728 return (packet[0] & 0x3c) == 0x3c && 729 (packet[1] & 0xf0) == 0x00 && 730 (packet[3] & 0x3e) == 0x38 && 731 (packet[4] & 0xf0) == 0x00; 732 } 733 734 /* 735 * We check the constant bits to determine what packet type we get, 736 * so packet checking is mandatory for v3 and later hardware. 737 */ 738 static int elantech_packet_check_v3(struct psmouse *psmouse) 739 { 740 struct elantech_data *etd = psmouse->private; 741 static const u8 debounce_packet[] = { 742 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff 743 }; 744 unsigned char *packet = psmouse->packet; 745 746 /* 747 * check debounce first, it has the same signature in byte 0 748 * and byte 3 as PACKET_V3_HEAD. 749 */ 750 if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) 751 return PACKET_DEBOUNCE; 752 753 /* 754 * If the hardware flag 'crc_enabled' is set the packets have 755 * different signatures. 756 */ 757 if (etd->info.crc_enabled) { 758 if ((packet[3] & 0x09) == 0x08) 759 return PACKET_V3_HEAD; 760 761 if ((packet[3] & 0x09) == 0x09) 762 return PACKET_V3_TAIL; 763 } else { 764 if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) 765 return PACKET_V3_HEAD; 766 767 if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) 768 return PACKET_V3_TAIL; 769 if ((packet[3] & 0x0f) == 0x06) 770 return PACKET_TRACKPOINT; 771 } 772 773 return PACKET_UNKNOWN; 774 } 775 776 static int elantech_packet_check_v4(struct psmouse *psmouse) 777 { 778 struct elantech_data *etd = psmouse->private; 779 unsigned char *packet = psmouse->packet; 780 unsigned char packet_type = packet[3] & 0x03; 781 unsigned int ic_version; 782 bool sanity_check; 783 784 if (etd->tp_dev && (packet[3] & 0x0f) == 0x06) 785 return PACKET_TRACKPOINT; 786 787 /* This represents the version of IC body. */ 788 ic_version = (etd->info.fw_version & 0x0f0000) >> 16; 789 790 /* 791 * Sanity check based on the constant bits of a packet. 792 * The constant bits change depending on the value of 793 * the hardware flag 'crc_enabled' and the version of 794 * the IC body, but are the same for every packet, 795 * regardless of the type. 796 */ 797 if (etd->info.crc_enabled) 798 sanity_check = ((packet[3] & 0x08) == 0x00); 799 else if (ic_version == 7 && etd->info.samples[1] == 0x2A) 800 sanity_check = ((packet[3] & 0x1c) == 0x10); 801 else 802 sanity_check = ((packet[0] & 0x08) == 0x00 && 803 (packet[3] & 0x1c) == 0x10); 804 805 if (!sanity_check) 806 return PACKET_UNKNOWN; 807 808 switch (packet_type) { 809 case 0: 810 return PACKET_V4_STATUS; 811 812 case 1: 813 return PACKET_V4_HEAD; 814 815 case 2: 816 return PACKET_V4_MOTION; 817 } 818 819 return PACKET_UNKNOWN; 820 } 821 822 /* 823 * Process byte stream from mouse and handle complete packets 824 */ 825 static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) 826 { 827 struct elantech_data *etd = psmouse->private; 828 int packet_type; 829 830 if (psmouse->pktcnt < psmouse->pktsize) 831 return PSMOUSE_GOOD_DATA; 832 833 if (etd->info.debug > 1) 834 elantech_packet_dump(psmouse); 835 836 switch (etd->info.hw_version) { 837 case 1: 838 if (etd->info.paritycheck && !elantech_packet_check_v1(psmouse)) 839 return PSMOUSE_BAD_DATA; 840 841 elantech_report_absolute_v1(psmouse); 842 break; 843 844 case 2: 845 /* ignore debounce */ 846 if (elantech_debounce_check_v2(psmouse)) 847 return PSMOUSE_FULL_PACKET; 848 849 if (etd->info.paritycheck && !elantech_packet_check_v2(psmouse)) 850 return PSMOUSE_BAD_DATA; 851 852 elantech_report_absolute_v2(psmouse); 853 break; 854 855 case 3: 856 packet_type = elantech_packet_check_v3(psmouse); 857 switch (packet_type) { 858 case PACKET_UNKNOWN: 859 return PSMOUSE_BAD_DATA; 860 861 case PACKET_DEBOUNCE: 862 /* ignore debounce */ 863 break; 864 865 case PACKET_TRACKPOINT: 866 elantech_report_trackpoint(psmouse, packet_type); 867 break; 868 869 default: 870 elantech_report_absolute_v3(psmouse, packet_type); 871 break; 872 } 873 874 break; 875 876 case 4: 877 packet_type = elantech_packet_check_v4(psmouse); 878 switch (packet_type) { 879 case PACKET_UNKNOWN: 880 return PSMOUSE_BAD_DATA; 881 882 case PACKET_TRACKPOINT: 883 elantech_report_trackpoint(psmouse, packet_type); 884 break; 885 886 default: 887 elantech_report_absolute_v4(psmouse, packet_type); 888 break; 889 } 890 891 break; 892 } 893 894 return PSMOUSE_FULL_PACKET; 895 } 896 897 /* 898 * This writes the reg_07 value again to the hardware at the end of every 899 * set_rate call because the register loses its value. reg_07 allows setting 900 * absolute mode on v4 hardware 901 */ 902 static void elantech_set_rate_restore_reg_07(struct psmouse *psmouse, 903 unsigned int rate) 904 { 905 struct elantech_data *etd = psmouse->private; 906 907 etd->original_set_rate(psmouse, rate); 908 if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) 909 psmouse_err(psmouse, "restoring reg_07 failed\n"); 910 } 911 912 /* 913 * Put the touchpad into absolute mode 914 */ 915 static int elantech_set_absolute_mode(struct psmouse *psmouse) 916 { 917 struct elantech_data *etd = psmouse->private; 918 unsigned char val; 919 int tries = ETP_READ_BACK_TRIES; 920 int rc = 0; 921 922 switch (etd->info.hw_version) { 923 case 1: 924 etd->reg_10 = 0x16; 925 etd->reg_11 = 0x8f; 926 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || 927 elantech_write_reg(psmouse, 0x11, etd->reg_11)) { 928 rc = -1; 929 } 930 break; 931 932 case 2: 933 /* Windows driver values */ 934 etd->reg_10 = 0x54; 935 etd->reg_11 = 0x88; /* 0x8a */ 936 etd->reg_21 = 0x60; /* 0x00 */ 937 if (elantech_write_reg(psmouse, 0x10, etd->reg_10) || 938 elantech_write_reg(psmouse, 0x11, etd->reg_11) || 939 elantech_write_reg(psmouse, 0x21, etd->reg_21)) { 940 rc = -1; 941 } 942 break; 943 944 case 3: 945 if (etd->info.set_hw_resolution) 946 etd->reg_10 = 0x0b; 947 else 948 etd->reg_10 = 0x01; 949 950 if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) 951 rc = -1; 952 953 break; 954 955 case 4: 956 etd->reg_07 = 0x01; 957 if (elantech_write_reg(psmouse, 0x07, etd->reg_07)) 958 rc = -1; 959 960 goto skip_readback_reg_10; /* v4 has no reg 0x10 to read */ 961 } 962 963 if (rc == 0) { 964 /* 965 * Read back reg 0x10. For hardware version 1 we must make 966 * sure the absolute mode bit is set. For hardware version 2 967 * the touchpad is probably initializing and not ready until 968 * we read back the value we just wrote. 969 */ 970 do { 971 rc = elantech_read_reg(psmouse, 0x10, &val); 972 if (rc == 0) 973 break; 974 tries--; 975 elantech_debug("retrying read (%d).\n", tries); 976 msleep(ETP_READ_BACK_DELAY); 977 } while (tries > 0); 978 979 if (rc) { 980 psmouse_err(psmouse, 981 "failed to read back register 0x10.\n"); 982 } else if (etd->info.hw_version == 1 && 983 !(val & ETP_R10_ABSOLUTE_MODE)) { 984 psmouse_err(psmouse, 985 "touchpad refuses to switch to absolute mode.\n"); 986 rc = -1; 987 } 988 } 989 990 skip_readback_reg_10: 991 if (rc) 992 psmouse_err(psmouse, "failed to initialise registers.\n"); 993 994 return rc; 995 } 996 997 static int elantech_set_range(struct psmouse *psmouse, 998 unsigned int *x_min, unsigned int *y_min, 999 unsigned int *x_max, unsigned int *y_max, 1000 unsigned int *width) 1001 { 1002 struct elantech_data *etd = psmouse->private; 1003 struct elantech_device_info *info = &etd->info; 1004 unsigned char param[3]; 1005 unsigned char traces; 1006 1007 switch (info->hw_version) { 1008 case 1: 1009 *x_min = ETP_XMIN_V1; 1010 *y_min = ETP_YMIN_V1; 1011 *x_max = ETP_XMAX_V1; 1012 *y_max = ETP_YMAX_V1; 1013 break; 1014 1015 case 2: 1016 if (info->fw_version == 0x020800 || 1017 info->fw_version == 0x020b00 || 1018 info->fw_version == 0x020030) { 1019 *x_min = ETP_XMIN_V2; 1020 *y_min = ETP_YMIN_V2; 1021 *x_max = ETP_XMAX_V2; 1022 *y_max = ETP_YMAX_V2; 1023 } else { 1024 int i; 1025 int fixed_dpi; 1026 1027 i = (info->fw_version > 0x020800 && 1028 info->fw_version < 0x020900) ? 1 : 2; 1029 1030 if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) 1031 return -1; 1032 1033 fixed_dpi = param[1] & 0x10; 1034 1035 if (((info->fw_version >> 16) == 0x14) && fixed_dpi) { 1036 if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param)) 1037 return -1; 1038 1039 *x_max = (info->capabilities[1] - i) * param[1] / 2; 1040 *y_max = (info->capabilities[2] - i) * param[2] / 2; 1041 } else if (info->fw_version == 0x040216) { 1042 *x_max = 819; 1043 *y_max = 405; 1044 } else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) { 1045 *x_max = 900; 1046 *y_max = 500; 1047 } else { 1048 *x_max = (info->capabilities[1] - i) * 64; 1049 *y_max = (info->capabilities[2] - i) * 64; 1050 } 1051 } 1052 break; 1053 1054 case 3: 1055 if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) 1056 return -1; 1057 1058 *x_max = (0x0f & param[0]) << 8 | param[1]; 1059 *y_max = (0xf0 & param[0]) << 4 | param[2]; 1060 break; 1061 1062 case 4: 1063 if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param)) 1064 return -1; 1065 1066 *x_max = (0x0f & param[0]) << 8 | param[1]; 1067 *y_max = (0xf0 & param[0]) << 4 | param[2]; 1068 traces = info->capabilities[1]; 1069 if ((traces < 2) || (traces > *x_max)) 1070 return -1; 1071 1072 *width = *x_max / (traces - 1); 1073 break; 1074 } 1075 1076 return 0; 1077 } 1078 1079 /* 1080 * (value from firmware) * 10 + 790 = dpi 1081 * we also have to convert dpi to dots/mm (*10/254 to avoid floating point) 1082 */ 1083 static unsigned int elantech_convert_res(unsigned int val) 1084 { 1085 return (val * 10 + 790) * 10 / 254; 1086 } 1087 1088 static int elantech_get_resolution_v4(struct psmouse *psmouse, 1089 unsigned int *x_res, 1090 unsigned int *y_res, 1091 unsigned int *bus) 1092 { 1093 unsigned char param[3]; 1094 1095 if (elantech_send_cmd(psmouse, ETP_RESOLUTION_QUERY, param)) 1096 return -1; 1097 1098 *x_res = elantech_convert_res(param[1] & 0x0f); 1099 *y_res = elantech_convert_res((param[1] & 0xf0) >> 4); 1100 *bus = param[2]; 1101 1102 return 0; 1103 } 1104 1105 /* 1106 * Advertise INPUT_PROP_BUTTONPAD for clickpads. The testing of bit 12 in 1107 * fw_version for this is based on the following fw_version & caps table: 1108 * 1109 * Laptop-model: fw_version: caps: buttons: 1110 * Acer S3 0x461f00 10, 13, 0e clickpad 1111 * Acer S7-392 0x581f01 50, 17, 0d clickpad 1112 * Acer V5-131 0x461f02 01, 16, 0c clickpad 1113 * Acer V5-551 0x461f00 ? clickpad 1114 * Asus K53SV 0x450f01 78, 15, 0c 2 hw buttons 1115 * Asus G46VW 0x460f02 00, 18, 0c 2 hw buttons 1116 * Asus G750JX 0x360f00 00, 16, 0c 2 hw buttons 1117 * Asus TP500LN 0x381f17 10, 14, 0e clickpad 1118 * Asus X750JN 0x381f17 10, 14, 0e clickpad 1119 * Asus UX31 0x361f00 20, 15, 0e clickpad 1120 * Asus UX32VD 0x361f02 00, 15, 0e clickpad 1121 * Avatar AVIU-145A2 0x361f00 ? clickpad 1122 * Fujitsu LIFEBOOK E544 0x470f00 d0, 12, 09 2 hw buttons 1123 * Fujitsu LIFEBOOK E546 0x470f00 50, 12, 09 2 hw buttons 1124 * Fujitsu LIFEBOOK E547 0x470f00 50, 12, 09 2 hw buttons 1125 * Fujitsu LIFEBOOK E554 0x570f01 40, 14, 0c 2 hw buttons 1126 * Fujitsu LIFEBOOK E557 0x570f01 40, 14, 0c 2 hw buttons 1127 * Fujitsu T725 0x470f01 05, 12, 09 2 hw buttons 1128 * Fujitsu H730 0x570f00 c0, 14, 0c 3 hw buttons (**) 1129 * Gigabyte U2442 0x450f01 58, 17, 0c 2 hw buttons 1130 * Lenovo L430 0x350f02 b9, 15, 0c 2 hw buttons (*) 1131 * Lenovo L530 0x350f02 b9, 15, 0c 2 hw buttons (*) 1132 * Samsung NF210 0x150b00 78, 14, 0a 2 hw buttons 1133 * Samsung NP770Z5E 0x575f01 10, 15, 0f clickpad 1134 * Samsung NP700Z5B 0x361f06 21, 15, 0f clickpad 1135 * Samsung NP900X3E-A02 0x575f03 ? clickpad 1136 * Samsung NP-QX410 0x851b00 19, 14, 0c clickpad 1137 * Samsung RC512 0x450f00 08, 15, 0c 2 hw buttons 1138 * Samsung RF710 0x450f00 ? 2 hw buttons 1139 * System76 Pangolin 0x250f01 ? 2 hw buttons 1140 * (*) + 3 trackpoint buttons 1141 * (**) + 0 trackpoint buttons 1142 * Note: Lenovo L430 and Lenovo L530 have the same fw_version/caps 1143 */ 1144 static void elantech_set_buttonpad_prop(struct psmouse *psmouse) 1145 { 1146 struct input_dev *dev = psmouse->dev; 1147 struct elantech_data *etd = psmouse->private; 1148 1149 if (etd->info.fw_version & 0x001000) { 1150 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1151 __clear_bit(BTN_RIGHT, dev->keybit); 1152 } 1153 } 1154 1155 /* 1156 * Some hw_version 4 models do have a middle button 1157 */ 1158 static const struct dmi_system_id elantech_dmi_has_middle_button[] = { 1159 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1160 { 1161 /* Fujitsu H730 has a middle button */ 1162 .matches = { 1163 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1164 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), 1165 }, 1166 }, 1167 { 1168 /* Fujitsu H760 also has a middle button */ 1169 .matches = { 1170 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1171 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), 1172 }, 1173 }, 1174 #endif 1175 { } 1176 }; 1177 1178 static const char * const middle_button_pnp_ids[] = { 1179 "LEN2131", /* ThinkPad P52 w/ NFC */ 1180 "LEN2132", /* ThinkPad P52 */ 1181 NULL 1182 }; 1183 1184 /* 1185 * Set the appropriate event bits for the input subsystem 1186 */ 1187 static int elantech_set_input_params(struct psmouse *psmouse) 1188 { 1189 struct input_dev *dev = psmouse->dev; 1190 struct elantech_data *etd = psmouse->private; 1191 struct elantech_device_info *info = &etd->info; 1192 unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0; 1193 1194 if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width)) 1195 return -1; 1196 1197 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1198 __set_bit(EV_KEY, dev->evbit); 1199 __set_bit(EV_ABS, dev->evbit); 1200 __clear_bit(EV_REL, dev->evbit); 1201 1202 __set_bit(BTN_LEFT, dev->keybit); 1203 if (dmi_check_system(elantech_dmi_has_middle_button) || 1204 psmouse_matches_pnp_id(psmouse, middle_button_pnp_ids)) 1205 __set_bit(BTN_MIDDLE, dev->keybit); 1206 __set_bit(BTN_RIGHT, dev->keybit); 1207 1208 __set_bit(BTN_TOUCH, dev->keybit); 1209 __set_bit(BTN_TOOL_FINGER, dev->keybit); 1210 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); 1211 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); 1212 1213 switch (info->hw_version) { 1214 case 1: 1215 /* Rocker button */ 1216 if (info->fw_version < 0x020000 && 1217 (info->capabilities[0] & ETP_CAP_HAS_ROCKER)) { 1218 __set_bit(BTN_FORWARD, dev->keybit); 1219 __set_bit(BTN_BACK, dev->keybit); 1220 } 1221 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); 1222 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); 1223 break; 1224 1225 case 2: 1226 __set_bit(BTN_TOOL_QUADTAP, dev->keybit); 1227 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); 1228 /* fall through */ 1229 case 3: 1230 if (info->hw_version == 3) 1231 elantech_set_buttonpad_prop(psmouse); 1232 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); 1233 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); 1234 if (info->reports_pressure) { 1235 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, 1236 ETP_PMAX_V2, 0, 0); 1237 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, 1238 ETP_WMAX_V2, 0, 0); 1239 } 1240 input_mt_init_slots(dev, 2, INPUT_MT_SEMI_MT); 1241 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); 1242 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); 1243 break; 1244 1245 case 4: 1246 elantech_set_buttonpad_prop(psmouse); 1247 __set_bit(BTN_TOOL_QUADTAP, dev->keybit); 1248 /* For X to recognize me as touchpad. */ 1249 input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); 1250 input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); 1251 /* 1252 * range of pressure and width is the same as v2, 1253 * report ABS_PRESSURE, ABS_TOOL_WIDTH for compatibility. 1254 */ 1255 input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2, 1256 ETP_PMAX_V2, 0, 0); 1257 input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, 1258 ETP_WMAX_V2, 0, 0); 1259 /* Multitouch capable pad, up to 5 fingers. */ 1260 input_mt_init_slots(dev, ETP_MAX_FINGERS, 0); 1261 input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); 1262 input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); 1263 input_set_abs_params(dev, ABS_MT_PRESSURE, ETP_PMIN_V2, 1264 ETP_PMAX_V2, 0, 0); 1265 /* 1266 * The firmware reports how many trace lines the finger spans, 1267 * convert to surface unit as Protocol-B requires. 1268 */ 1269 input_set_abs_params(dev, ABS_MT_TOUCH_MAJOR, 0, 1270 ETP_WMAX_V2 * width, 0, 0); 1271 break; 1272 } 1273 1274 input_abs_set_res(dev, ABS_X, info->x_res); 1275 input_abs_set_res(dev, ABS_Y, info->y_res); 1276 if (info->hw_version > 1) { 1277 input_abs_set_res(dev, ABS_MT_POSITION_X, info->x_res); 1278 input_abs_set_res(dev, ABS_MT_POSITION_Y, info->y_res); 1279 } 1280 1281 etd->y_max = y_max; 1282 etd->width = width; 1283 1284 return 0; 1285 } 1286 1287 struct elantech_attr_data { 1288 size_t field_offset; 1289 unsigned char reg; 1290 }; 1291 1292 /* 1293 * Display a register value by reading a sysfs entry 1294 */ 1295 static ssize_t elantech_show_int_attr(struct psmouse *psmouse, void *data, 1296 char *buf) 1297 { 1298 struct elantech_data *etd = psmouse->private; 1299 struct elantech_attr_data *attr = data; 1300 unsigned char *reg = (unsigned char *) etd + attr->field_offset; 1301 int rc = 0; 1302 1303 if (attr->reg) 1304 rc = elantech_read_reg(psmouse, attr->reg, reg); 1305 1306 return sprintf(buf, "0x%02x\n", (attr->reg && rc) ? -1 : *reg); 1307 } 1308 1309 /* 1310 * Write a register value by writing a sysfs entry 1311 */ 1312 static ssize_t elantech_set_int_attr(struct psmouse *psmouse, 1313 void *data, const char *buf, size_t count) 1314 { 1315 struct elantech_data *etd = psmouse->private; 1316 struct elantech_attr_data *attr = data; 1317 unsigned char *reg = (unsigned char *) etd + attr->field_offset; 1318 unsigned char value; 1319 int err; 1320 1321 err = kstrtou8(buf, 16, &value); 1322 if (err) 1323 return err; 1324 1325 /* Do we need to preserve some bits for version 2 hardware too? */ 1326 if (etd->info.hw_version == 1) { 1327 if (attr->reg == 0x10) 1328 /* Force absolute mode always on */ 1329 value |= ETP_R10_ABSOLUTE_MODE; 1330 else if (attr->reg == 0x11) 1331 /* Force 4 byte mode always on */ 1332 value |= ETP_R11_4_BYTE_MODE; 1333 } 1334 1335 if (!attr->reg || elantech_write_reg(psmouse, attr->reg, value) == 0) 1336 *reg = value; 1337 1338 return count; 1339 } 1340 1341 #define ELANTECH_INT_ATTR(_name, _register) \ 1342 static struct elantech_attr_data elantech_attr_##_name = { \ 1343 .field_offset = offsetof(struct elantech_data, _name), \ 1344 .reg = _register, \ 1345 }; \ 1346 PSMOUSE_DEFINE_ATTR(_name, 0644, \ 1347 &elantech_attr_##_name, \ 1348 elantech_show_int_attr, \ 1349 elantech_set_int_attr) 1350 1351 #define ELANTECH_INFO_ATTR(_name) \ 1352 static struct elantech_attr_data elantech_attr_##_name = { \ 1353 .field_offset = offsetof(struct elantech_data, info) + \ 1354 offsetof(struct elantech_device_info, _name), \ 1355 .reg = 0, \ 1356 }; \ 1357 PSMOUSE_DEFINE_ATTR(_name, 0644, \ 1358 &elantech_attr_##_name, \ 1359 elantech_show_int_attr, \ 1360 elantech_set_int_attr) 1361 1362 ELANTECH_INT_ATTR(reg_07, 0x07); 1363 ELANTECH_INT_ATTR(reg_10, 0x10); 1364 ELANTECH_INT_ATTR(reg_11, 0x11); 1365 ELANTECH_INT_ATTR(reg_20, 0x20); 1366 ELANTECH_INT_ATTR(reg_21, 0x21); 1367 ELANTECH_INT_ATTR(reg_22, 0x22); 1368 ELANTECH_INT_ATTR(reg_23, 0x23); 1369 ELANTECH_INT_ATTR(reg_24, 0x24); 1370 ELANTECH_INT_ATTR(reg_25, 0x25); 1371 ELANTECH_INT_ATTR(reg_26, 0x26); 1372 ELANTECH_INFO_ATTR(debug); 1373 ELANTECH_INFO_ATTR(paritycheck); 1374 ELANTECH_INFO_ATTR(crc_enabled); 1375 1376 static struct attribute *elantech_attrs[] = { 1377 &psmouse_attr_reg_07.dattr.attr, 1378 &psmouse_attr_reg_10.dattr.attr, 1379 &psmouse_attr_reg_11.dattr.attr, 1380 &psmouse_attr_reg_20.dattr.attr, 1381 &psmouse_attr_reg_21.dattr.attr, 1382 &psmouse_attr_reg_22.dattr.attr, 1383 &psmouse_attr_reg_23.dattr.attr, 1384 &psmouse_attr_reg_24.dattr.attr, 1385 &psmouse_attr_reg_25.dattr.attr, 1386 &psmouse_attr_reg_26.dattr.attr, 1387 &psmouse_attr_debug.dattr.attr, 1388 &psmouse_attr_paritycheck.dattr.attr, 1389 &psmouse_attr_crc_enabled.dattr.attr, 1390 NULL 1391 }; 1392 1393 static const struct attribute_group elantech_attr_group = { 1394 .attrs = elantech_attrs, 1395 }; 1396 1397 static bool elantech_is_signature_valid(const unsigned char *param) 1398 { 1399 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10 }; 1400 int i; 1401 1402 if (param[0] == 0) 1403 return false; 1404 1405 if (param[1] == 0) 1406 return true; 1407 1408 /* 1409 * Some hw_version >= 4 models have a revision higher then 20. Meaning 1410 * that param[2] may be 10 or 20, skip the rates check for these. 1411 */ 1412 if ((param[0] & 0x0f) >= 0x06 && (param[1] & 0xaf) == 0x0f && 1413 param[2] < 40) 1414 return true; 1415 1416 for (i = 0; i < ARRAY_SIZE(rates); i++) 1417 if (param[2] == rates[i]) 1418 return false; 1419 1420 return true; 1421 } 1422 1423 /* 1424 * Use magic knock to detect Elantech touchpad 1425 */ 1426 int elantech_detect(struct psmouse *psmouse, bool set_properties) 1427 { 1428 struct ps2dev *ps2dev = &psmouse->ps2dev; 1429 unsigned char param[3]; 1430 1431 ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1432 1433 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1434 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1435 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1436 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1437 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { 1438 psmouse_dbg(psmouse, "sending Elantech magic knock failed.\n"); 1439 return -1; 1440 } 1441 1442 /* 1443 * Report this in case there are Elantech models that use a different 1444 * set of magic numbers 1445 */ 1446 if (param[0] != 0x3c || param[1] != 0x03 || 1447 (param[2] != 0xc8 && param[2] != 0x00)) { 1448 psmouse_dbg(psmouse, 1449 "unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", 1450 param[0], param[1], param[2]); 1451 return -1; 1452 } 1453 1454 /* 1455 * Query touchpad's firmware version and see if it reports known 1456 * value to avoid mis-detection. Logitech mice are known to respond 1457 * to Elantech magic knock and there might be more. 1458 */ 1459 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { 1460 psmouse_dbg(psmouse, "failed to query firmware version.\n"); 1461 return -1; 1462 } 1463 1464 psmouse_dbg(psmouse, 1465 "Elantech version query result 0x%02x, 0x%02x, 0x%02x.\n", 1466 param[0], param[1], param[2]); 1467 1468 if (!elantech_is_signature_valid(param)) { 1469 psmouse_dbg(psmouse, 1470 "Probably not a real Elantech touchpad. Aborting.\n"); 1471 return -1; 1472 } 1473 1474 if (set_properties) { 1475 psmouse->vendor = "Elantech"; 1476 psmouse->name = "Touchpad"; 1477 } 1478 1479 return 0; 1480 } 1481 1482 /* 1483 * Clean up sysfs entries when disconnecting 1484 */ 1485 static void elantech_disconnect(struct psmouse *psmouse) 1486 { 1487 struct elantech_data *etd = psmouse->private; 1488 1489 /* 1490 * We might have left a breadcrumb when trying to 1491 * set up SMbus companion. 1492 */ 1493 psmouse_smbus_cleanup(psmouse); 1494 1495 if (etd->tp_dev) 1496 input_unregister_device(etd->tp_dev); 1497 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, 1498 &elantech_attr_group); 1499 kfree(psmouse->private); 1500 psmouse->private = NULL; 1501 } 1502 1503 /* 1504 * Put the touchpad back into absolute mode when reconnecting 1505 */ 1506 static int elantech_reconnect(struct psmouse *psmouse) 1507 { 1508 psmouse_reset(psmouse); 1509 1510 if (elantech_detect(psmouse, 0)) 1511 return -1; 1512 1513 if (elantech_set_absolute_mode(psmouse)) { 1514 psmouse_err(psmouse, 1515 "failed to put touchpad back into absolute mode.\n"); 1516 return -1; 1517 } 1518 1519 return 0; 1520 } 1521 1522 /* 1523 * Some hw_version 4 models do not work with crc_disabled 1524 */ 1525 static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = { 1526 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1527 { 1528 /* Fujitsu H730 does not work with crc_enabled == 0 */ 1529 .matches = { 1530 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1531 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"), 1532 }, 1533 }, 1534 { 1535 /* Fujitsu H760 does not work with crc_enabled == 0 */ 1536 .matches = { 1537 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1538 DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H760"), 1539 }, 1540 }, 1541 { 1542 /* Fujitsu LIFEBOOK E544 does not work with crc_enabled == 0 */ 1543 .matches = { 1544 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1545 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"), 1546 }, 1547 }, 1548 { 1549 /* Fujitsu LIFEBOOK E546 does not work with crc_enabled == 0 */ 1550 .matches = { 1551 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1552 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E546"), 1553 }, 1554 }, 1555 { 1556 /* Fujitsu LIFEBOOK E547 does not work with crc_enabled == 0 */ 1557 .matches = { 1558 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1559 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E547"), 1560 }, 1561 }, 1562 { 1563 /* Fujitsu LIFEBOOK E554 does not work with crc_enabled == 0 */ 1564 .matches = { 1565 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1566 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E554"), 1567 }, 1568 }, 1569 { 1570 /* Fujitsu LIFEBOOK E556 does not work with crc_enabled == 0 */ 1571 .matches = { 1572 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1573 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E556"), 1574 }, 1575 }, 1576 { 1577 /* Fujitsu LIFEBOOK E557 does not work with crc_enabled == 0 */ 1578 .matches = { 1579 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1580 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E557"), 1581 }, 1582 }, 1583 { 1584 /* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */ 1585 .matches = { 1586 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"), 1587 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"), 1588 }, 1589 }, 1590 #endif 1591 { } 1592 }; 1593 1594 /* 1595 * Some hw_version 3 models go into error state when we try to set 1596 * bit 3 and/or bit 1 of r10. 1597 */ 1598 static const struct dmi_system_id no_hw_res_dmi_table[] = { 1599 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1600 { 1601 /* Gigabyte U2442 */ 1602 .matches = { 1603 DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), 1604 DMI_MATCH(DMI_PRODUCT_NAME, "U2442"), 1605 }, 1606 }, 1607 #endif 1608 { } 1609 }; 1610 1611 /* 1612 * determine hardware version and set some properties according to it. 1613 */ 1614 static int elantech_set_properties(struct elantech_device_info *info) 1615 { 1616 /* This represents the version of IC body. */ 1617 int ver = (info->fw_version & 0x0f0000) >> 16; 1618 1619 /* Early version of Elan touchpads doesn't obey the rule. */ 1620 if (info->fw_version < 0x020030 || info->fw_version == 0x020600) 1621 info->hw_version = 1; 1622 else { 1623 switch (ver) { 1624 case 2: 1625 case 4: 1626 info->hw_version = 2; 1627 break; 1628 case 5: 1629 info->hw_version = 3; 1630 break; 1631 case 6 ... 15: 1632 info->hw_version = 4; 1633 break; 1634 default: 1635 return -1; 1636 } 1637 } 1638 1639 /* decide which send_cmd we're gonna use early */ 1640 info->send_cmd = info->hw_version >= 3 ? elantech_send_cmd : 1641 synaptics_send_cmd; 1642 1643 /* Turn on packet checking by default */ 1644 info->paritycheck = 1; 1645 1646 /* 1647 * This firmware suffers from misreporting coordinates when 1648 * a touch action starts causing the mouse cursor or scrolled page 1649 * to jump. Enable a workaround. 1650 */ 1651 info->jumpy_cursor = 1652 (info->fw_version == 0x020022 || info->fw_version == 0x020600); 1653 1654 if (info->hw_version > 1) { 1655 /* For now show extra debug information */ 1656 info->debug = 1; 1657 1658 if (info->fw_version >= 0x020800) 1659 info->reports_pressure = true; 1660 } 1661 1662 /* 1663 * The signatures of v3 and v4 packets change depending on the 1664 * value of this hardware flag. 1665 */ 1666 info->crc_enabled = (info->fw_version & 0x4000) == 0x4000 || 1667 dmi_check_system(elantech_dmi_force_crc_enabled); 1668 1669 /* Enable real hardware resolution on hw_version 3 ? */ 1670 info->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table); 1671 1672 return 0; 1673 } 1674 1675 static int elantech_query_info(struct psmouse *psmouse, 1676 struct elantech_device_info *info) 1677 { 1678 unsigned char param[3]; 1679 1680 memset(info, 0, sizeof(*info)); 1681 1682 /* 1683 * Do the version query again so we can store the result 1684 */ 1685 if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) { 1686 psmouse_err(psmouse, "failed to query firmware version.\n"); 1687 return -EINVAL; 1688 } 1689 info->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; 1690 1691 if (elantech_set_properties(info)) { 1692 psmouse_err(psmouse, "unknown hardware version, aborting...\n"); 1693 return -EINVAL; 1694 } 1695 psmouse_info(psmouse, 1696 "assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n", 1697 info->hw_version, param[0], param[1], param[2]); 1698 1699 if (info->send_cmd(psmouse, ETP_CAPABILITIES_QUERY, 1700 info->capabilities)) { 1701 psmouse_err(psmouse, "failed to query capabilities.\n"); 1702 return -EINVAL; 1703 } 1704 psmouse_info(psmouse, 1705 "Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n", 1706 info->capabilities[0], info->capabilities[1], 1707 info->capabilities[2]); 1708 1709 if (info->hw_version != 1) { 1710 if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, info->samples)) { 1711 psmouse_err(psmouse, "failed to query sample data\n"); 1712 return -EINVAL; 1713 } 1714 psmouse_info(psmouse, 1715 "Elan sample query result %02x, %02x, %02x\n", 1716 info->samples[0], 1717 info->samples[1], 1718 info->samples[2]); 1719 } 1720 1721 if (info->samples[1] == 0x74 && info->hw_version == 0x03) { 1722 /* 1723 * This module has a bug which makes absolute mode 1724 * unusable, so let's abort so we'll be using standard 1725 * PS/2 protocol. 1726 */ 1727 psmouse_info(psmouse, 1728 "absolute mode broken, forcing standard PS/2 protocol\n"); 1729 return -ENODEV; 1730 } 1731 1732 /* The MSB indicates the presence of the trackpoint */ 1733 info->has_trackpoint = (info->capabilities[0] & 0x80) == 0x80; 1734 1735 info->x_res = 31; 1736 info->y_res = 31; 1737 if (info->hw_version == 4) { 1738 if (elantech_get_resolution_v4(psmouse, 1739 &info->x_res, 1740 &info->y_res, 1741 &info->bus)) { 1742 psmouse_warn(psmouse, 1743 "failed to query resolution data.\n"); 1744 } 1745 } 1746 1747 return 0; 1748 } 1749 1750 #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) 1751 1752 /* 1753 * The newest Elantech device can use a secondary bus (over SMBus) which 1754 * provides a better bandwidth and allow a better control of the touchpads. 1755 * This is used to decide if we need to use this bus or not. 1756 */ 1757 enum { 1758 ELANTECH_SMBUS_NOT_SET = -1, 1759 ELANTECH_SMBUS_OFF, 1760 ELANTECH_SMBUS_ON, 1761 }; 1762 1763 static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ? 1764 ELANTECH_SMBUS_NOT_SET : ELANTECH_SMBUS_OFF; 1765 module_param_named(elantech_smbus, elantech_smbus, int, 0644); 1766 MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device."); 1767 1768 static int elantech_create_smbus(struct psmouse *psmouse, 1769 struct elantech_device_info *info, 1770 bool leave_breadcrumbs) 1771 { 1772 const struct property_entry i2c_properties[] = { 1773 PROPERTY_ENTRY_BOOL("elan,trackpoint"), 1774 { }, 1775 }; 1776 struct i2c_board_info smbus_board = { 1777 I2C_BOARD_INFO("elan_i2c", 0x15), 1778 .flags = I2C_CLIENT_HOST_NOTIFY, 1779 }; 1780 1781 if (info->has_trackpoint) 1782 smbus_board.properties = i2c_properties; 1783 1784 return psmouse_smbus_init(psmouse, &smbus_board, NULL, 0, false, 1785 leave_breadcrumbs); 1786 } 1787 1788 /** 1789 * elantech_setup_smbus - called once the PS/2 devices are enumerated 1790 * and decides to instantiate a SMBus InterTouch device. 1791 */ 1792 static int elantech_setup_smbus(struct psmouse *psmouse, 1793 struct elantech_device_info *info, 1794 bool leave_breadcrumbs) 1795 { 1796 int error; 1797 1798 if (elantech_smbus == ELANTECH_SMBUS_OFF) 1799 return -ENXIO; 1800 1801 if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) { 1802 /* 1803 * New ICs are enabled by default. 1804 * Old ICs are up to the user to decide. 1805 */ 1806 if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) 1807 return -ENXIO; 1808 } 1809 1810 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1811 1812 error = elantech_create_smbus(psmouse, info, leave_breadcrumbs); 1813 if (error) { 1814 if (error == -EAGAIN) 1815 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1816 else 1817 psmouse_err(psmouse, "unable to create intertouch device\n"); 1818 1819 return error; 1820 } 1821 1822 return 0; 1823 } 1824 1825 static bool elantech_use_host_notify(struct psmouse *psmouse, 1826 struct elantech_device_info *info) 1827 { 1828 if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version)) 1829 return true; 1830 1831 switch (info->bus) { 1832 case ETP_BUS_PS2_ONLY: 1833 /* expected case */ 1834 break; 1835 case ETP_BUS_SMB_ALERT_ONLY: 1836 /* fall-through */ 1837 case ETP_BUS_PS2_SMB_ALERT: 1838 psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n"); 1839 break; 1840 case ETP_BUS_SMB_HST_NTFY_ONLY: 1841 /* fall-through */ 1842 case ETP_BUS_PS2_SMB_HST_NTFY: 1843 return true; 1844 default: 1845 psmouse_dbg(psmouse, 1846 "Ignoring SMBus bus provider %d.\n", 1847 info->bus); 1848 } 1849 1850 return false; 1851 } 1852 1853 int elantech_init_smbus(struct psmouse *psmouse) 1854 { 1855 struct elantech_device_info info; 1856 int error = -EINVAL; 1857 1858 psmouse_reset(psmouse); 1859 1860 error = elantech_query_info(psmouse, &info); 1861 if (error) 1862 goto init_fail; 1863 1864 if (info.hw_version < 4) { 1865 error = -ENXIO; 1866 goto init_fail; 1867 } 1868 1869 return elantech_create_smbus(psmouse, &info, false); 1870 init_fail: 1871 psmouse_reset(psmouse); 1872 return error; 1873 } 1874 #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ 1875 1876 /* 1877 * Initialize the touchpad and create sysfs entries 1878 */ 1879 static int elantech_setup_ps2(struct psmouse *psmouse, 1880 struct elantech_device_info *info) 1881 { 1882 struct elantech_data *etd; 1883 int i; 1884 int error = -EINVAL; 1885 struct input_dev *tp_dev; 1886 1887 psmouse->private = etd = kzalloc(sizeof(*etd), GFP_KERNEL); 1888 if (!etd) 1889 return -ENOMEM; 1890 1891 etd->info = *info; 1892 1893 etd->parity[0] = 1; 1894 for (i = 1; i < 256; i++) 1895 etd->parity[i] = etd->parity[i & (i - 1)] ^ 1; 1896 1897 if (elantech_set_absolute_mode(psmouse)) { 1898 psmouse_err(psmouse, 1899 "failed to put touchpad into absolute mode.\n"); 1900 goto init_fail; 1901 } 1902 1903 if (info->fw_version == 0x381f17) { 1904 etd->original_set_rate = psmouse->set_rate; 1905 psmouse->set_rate = elantech_set_rate_restore_reg_07; 1906 } 1907 1908 if (elantech_set_input_params(psmouse)) { 1909 psmouse_err(psmouse, "failed to query touchpad range.\n"); 1910 goto init_fail; 1911 } 1912 1913 error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, 1914 &elantech_attr_group); 1915 if (error) { 1916 psmouse_err(psmouse, 1917 "failed to create sysfs attributes, error: %d.\n", 1918 error); 1919 goto init_fail; 1920 } 1921 1922 if (info->has_trackpoint) { 1923 tp_dev = input_allocate_device(); 1924 1925 if (!tp_dev) { 1926 error = -ENOMEM; 1927 goto init_fail_tp_alloc; 1928 } 1929 1930 etd->tp_dev = tp_dev; 1931 snprintf(etd->tp_phys, sizeof(etd->tp_phys), "%s/input1", 1932 psmouse->ps2dev.serio->phys); 1933 tp_dev->phys = etd->tp_phys; 1934 tp_dev->name = "ETPS/2 Elantech TrackPoint"; 1935 tp_dev->id.bustype = BUS_I8042; 1936 tp_dev->id.vendor = 0x0002; 1937 tp_dev->id.product = PSMOUSE_ELANTECH; 1938 tp_dev->id.version = 0x0000; 1939 tp_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1940 tp_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1941 tp_dev->relbit[BIT_WORD(REL_X)] = 1942 BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1943 tp_dev->keybit[BIT_WORD(BTN_LEFT)] = 1944 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | 1945 BIT_MASK(BTN_RIGHT); 1946 1947 __set_bit(INPUT_PROP_POINTER, tp_dev->propbit); 1948 __set_bit(INPUT_PROP_POINTING_STICK, tp_dev->propbit); 1949 1950 error = input_register_device(etd->tp_dev); 1951 if (error < 0) 1952 goto init_fail_tp_reg; 1953 } 1954 1955 psmouse->protocol_handler = elantech_process_byte; 1956 psmouse->disconnect = elantech_disconnect; 1957 psmouse->reconnect = elantech_reconnect; 1958 psmouse->pktsize = info->hw_version > 1 ? 6 : 4; 1959 1960 return 0; 1961 init_fail_tp_reg: 1962 input_free_device(tp_dev); 1963 init_fail_tp_alloc: 1964 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, 1965 &elantech_attr_group); 1966 init_fail: 1967 kfree(etd); 1968 return error; 1969 } 1970 1971 int elantech_init_ps2(struct psmouse *psmouse) 1972 { 1973 struct elantech_device_info info; 1974 int error = -EINVAL; 1975 1976 psmouse_reset(psmouse); 1977 1978 error = elantech_query_info(psmouse, &info); 1979 if (error) 1980 goto init_fail; 1981 1982 error = elantech_setup_ps2(psmouse, &info); 1983 if (error) 1984 goto init_fail; 1985 1986 return 0; 1987 init_fail: 1988 psmouse_reset(psmouse); 1989 return error; 1990 } 1991 1992 int elantech_init(struct psmouse *psmouse) 1993 { 1994 struct elantech_device_info info; 1995 int error = -EINVAL; 1996 1997 psmouse_reset(psmouse); 1998 1999 error = elantech_query_info(psmouse, &info); 2000 if (error) 2001 goto init_fail; 2002 2003 #if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS) 2004 2005 if (elantech_use_host_notify(psmouse, &info)) { 2006 if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) || 2007 !IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)) { 2008 psmouse_warn(psmouse, 2009 "The touchpad can support a better bus than the too old PS/2 protocol. " 2010 "Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n"); 2011 } 2012 error = elantech_setup_smbus(psmouse, &info, true); 2013 if (!error) 2014 return PSMOUSE_ELANTECH_SMBUS; 2015 } 2016 2017 #endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */ 2018 2019 error = elantech_setup_ps2(psmouse, &info); 2020 if (error < 0) { 2021 /* 2022 * Not using any flavor of Elantech support, so clean up 2023 * SMbus breadcrumbs, if any. 2024 */ 2025 psmouse_smbus_cleanup(psmouse); 2026 goto init_fail; 2027 } 2028 2029 return PSMOUSE_ELANTECH; 2030 init_fail: 2031 psmouse_reset(psmouse); 2032 return error; 2033 } 2034