1 /* 2 * PS/2 mouse driver 3 * 4 * Copyright (c) 1999-2002 Vojtech Pavlik 5 * Copyright (c) 2003-2004 Dmitry Torokhov 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 version 2 as published by 11 * the Free Software Foundation. 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 #define psmouse_fmt(fmt) fmt 16 17 #include <linux/delay.h> 18 #include <linux/module.h> 19 #include <linux/slab.h> 20 #include <linux/interrupt.h> 21 #include <linux/input.h> 22 #include <linux/serio.h> 23 #include <linux/init.h> 24 #include <linux/libps2.h> 25 #include <linux/mutex.h> 26 27 #include "psmouse.h" 28 #include "synaptics.h" 29 #include "logips2pp.h" 30 #include "alps.h" 31 #include "hgpk.h" 32 #include "lifebook.h" 33 #include "trackpoint.h" 34 #include "touchkit_ps2.h" 35 #include "elantech.h" 36 #include "sentelic.h" 37 #include "cypress_ps2.h" 38 #include "focaltech.h" 39 #include "vmmouse.h" 40 #include "byd.h" 41 42 #define DRIVER_DESC "PS/2 mouse driver" 43 44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 45 MODULE_DESCRIPTION(DRIVER_DESC); 46 MODULE_LICENSE("GPL"); 47 48 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 49 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 50 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 51 static const struct kernel_param_ops param_ops_proto_abbrev = { 52 .set = psmouse_set_maxproto, 53 .get = psmouse_get_maxproto, 54 }; 55 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 56 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 57 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 58 59 static unsigned int psmouse_resolution = 200; 60 module_param_named(resolution, psmouse_resolution, uint, 0644); 61 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 62 63 static unsigned int psmouse_rate = 100; 64 module_param_named(rate, psmouse_rate, uint, 0644); 65 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 66 67 static bool psmouse_smartscroll = true; 68 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 69 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 70 71 static unsigned int psmouse_resetafter = 5; 72 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 73 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 74 75 static unsigned int psmouse_resync_time; 76 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 77 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 78 79 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 80 NULL, 81 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 82 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 83 (void *) offsetof(struct psmouse, rate), 84 psmouse_show_int_attr, psmouse_attr_set_rate); 85 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 86 (void *) offsetof(struct psmouse, resolution), 87 psmouse_show_int_attr, psmouse_attr_set_resolution); 88 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 89 (void *) offsetof(struct psmouse, resetafter), 90 psmouse_show_int_attr, psmouse_set_int_attr); 91 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 92 (void *) offsetof(struct psmouse, resync_time), 93 psmouse_show_int_attr, psmouse_set_int_attr); 94 95 static struct attribute *psmouse_attributes[] = { 96 &psmouse_attr_protocol.dattr.attr, 97 &psmouse_attr_rate.dattr.attr, 98 &psmouse_attr_resolution.dattr.attr, 99 &psmouse_attr_resetafter.dattr.attr, 100 &psmouse_attr_resync_time.dattr.attr, 101 NULL 102 }; 103 104 static struct attribute_group psmouse_attribute_group = { 105 .attrs = psmouse_attributes, 106 }; 107 108 /* 109 * psmouse_mutex protects all operations changing state of mouse 110 * (connecting, disconnecting, changing rate or resolution via 111 * sysfs). We could use a per-device semaphore but since there 112 * rarely more than one PS/2 mouse connected and since semaphore 113 * is taken in "slow" paths it is not worth it. 114 */ 115 static DEFINE_MUTEX(psmouse_mutex); 116 117 static struct workqueue_struct *kpsmoused_wq; 118 119 struct psmouse_protocol { 120 enum psmouse_type type; 121 bool maxproto; 122 bool ignore_parity; /* Protocol should ignore parity errors from KBC */ 123 bool try_passthru; /* Try protocol also on passthrough ports */ 124 const char *name; 125 const char *alias; 126 int (*detect)(struct psmouse *, bool); 127 int (*init)(struct psmouse *); 128 }; 129 130 /* 131 * psmouse_process_byte() analyzes the PS/2 data stream and reports 132 * relevant events to the input module once full packet has arrived. 133 */ 134 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 135 { 136 struct input_dev *dev = psmouse->dev; 137 unsigned char *packet = psmouse->packet; 138 139 if (psmouse->pktcnt < psmouse->pktsize) 140 return PSMOUSE_GOOD_DATA; 141 142 /* Full packet accumulated, process it */ 143 144 switch (psmouse->type) { 145 case PSMOUSE_IMPS: 146 /* IntelliMouse has scroll wheel */ 147 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 148 break; 149 150 case PSMOUSE_IMEX: 151 /* Scroll wheel and buttons on IntelliMouse Explorer */ 152 switch (packet[3] & 0xC0) { 153 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 154 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 155 break; 156 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 157 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 158 break; 159 case 0x00: 160 case 0xC0: 161 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 162 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 163 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 164 break; 165 } 166 break; 167 168 case PSMOUSE_GENPS: 169 /* Report scroll buttons on NetMice */ 170 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 171 172 /* Extra buttons on Genius NewNet 3D */ 173 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 174 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 175 break; 176 177 case PSMOUSE_THINKPS: 178 /* Extra button on ThinkingMouse */ 179 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 180 181 /* 182 * Without this bit of weirdness moving up gives wildly 183 * high Y changes. 184 */ 185 packet[1] |= (packet[0] & 0x40) << 1; 186 break; 187 188 case PSMOUSE_CORTRON: 189 /* 190 * Cortron PS2 Trackball reports SIDE button in the 191 * 4th bit of the first byte. 192 */ 193 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 194 packet[0] |= 0x08; 195 break; 196 197 default: 198 break; 199 } 200 201 /* Generic PS/2 Mouse */ 202 input_report_key(dev, BTN_LEFT, packet[0] & 1); 203 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 204 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 205 206 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 207 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 208 209 input_sync(dev); 210 211 return PSMOUSE_FULL_PACKET; 212 } 213 214 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 215 unsigned long delay) 216 { 217 queue_delayed_work(kpsmoused_wq, work, delay); 218 } 219 220 /* 221 * __psmouse_set_state() sets new psmouse state and resets all flags. 222 */ 223 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 224 { 225 psmouse->state = new_state; 226 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 227 psmouse->ps2dev.flags = 0; 228 psmouse->last = jiffies; 229 } 230 231 /* 232 * psmouse_set_state() sets new psmouse state and resets all flags and 233 * counters while holding serio lock so fighting with interrupt handler 234 * is not a concern. 235 */ 236 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 237 { 238 serio_pause_rx(psmouse->ps2dev.serio); 239 __psmouse_set_state(psmouse, new_state); 240 serio_continue_rx(psmouse->ps2dev.serio); 241 } 242 243 /* 244 * psmouse_handle_byte() processes one byte of the input data stream 245 * by calling corresponding protocol handler. 246 */ 247 static int psmouse_handle_byte(struct psmouse *psmouse) 248 { 249 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 250 251 switch (rc) { 252 case PSMOUSE_BAD_DATA: 253 if (psmouse->state == PSMOUSE_ACTIVATED) { 254 psmouse_warn(psmouse, 255 "%s at %s lost sync at byte %d\n", 256 psmouse->name, psmouse->phys, 257 psmouse->pktcnt); 258 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 259 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 260 psmouse_notice(psmouse, 261 "issuing reconnect request\n"); 262 serio_reconnect(psmouse->ps2dev.serio); 263 return -1; 264 } 265 } 266 psmouse->pktcnt = 0; 267 break; 268 269 case PSMOUSE_FULL_PACKET: 270 psmouse->pktcnt = 0; 271 if (psmouse->out_of_sync_cnt) { 272 psmouse->out_of_sync_cnt = 0; 273 psmouse_notice(psmouse, 274 "%s at %s - driver resynced.\n", 275 psmouse->name, psmouse->phys); 276 } 277 break; 278 279 case PSMOUSE_GOOD_DATA: 280 break; 281 } 282 return 0; 283 } 284 285 /* 286 * psmouse_interrupt() handles incoming characters, either passing them 287 * for normal processing or gathering them as command response. 288 */ 289 static irqreturn_t psmouse_interrupt(struct serio *serio, 290 unsigned char data, unsigned int flags) 291 { 292 struct psmouse *psmouse = serio_get_drvdata(serio); 293 294 if (psmouse->state == PSMOUSE_IGNORE) 295 goto out; 296 297 if (unlikely((flags & SERIO_TIMEOUT) || 298 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) { 299 300 if (psmouse->state == PSMOUSE_ACTIVATED) 301 psmouse_warn(psmouse, 302 "bad data from KBC -%s%s\n", 303 flags & SERIO_TIMEOUT ? " timeout" : "", 304 flags & SERIO_PARITY ? " bad parity" : ""); 305 ps2_cmd_aborted(&psmouse->ps2dev); 306 goto out; 307 } 308 309 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 310 if (ps2_handle_ack(&psmouse->ps2dev, data)) 311 goto out; 312 313 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 314 if (ps2_handle_response(&psmouse->ps2dev, data)) 315 goto out; 316 317 if (psmouse->state <= PSMOUSE_RESYNCING) 318 goto out; 319 320 if (psmouse->state == PSMOUSE_ACTIVATED && 321 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 322 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 323 psmouse->name, psmouse->phys, psmouse->pktcnt); 324 psmouse->badbyte = psmouse->packet[0]; 325 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 326 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 327 goto out; 328 } 329 330 psmouse->packet[psmouse->pktcnt++] = data; 331 332 /* Check if this is a new device announcement (0xAA 0x00) */ 333 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 334 if (psmouse->pktcnt == 1) { 335 psmouse->last = jiffies; 336 goto out; 337 } 338 339 if (psmouse->packet[1] == PSMOUSE_RET_ID || 340 (psmouse->type == PSMOUSE_HGPK && 341 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 342 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 343 serio_reconnect(serio); 344 goto out; 345 } 346 347 /* Not a new device, try processing first byte normally */ 348 psmouse->pktcnt = 1; 349 if (psmouse_handle_byte(psmouse)) 350 goto out; 351 352 psmouse->packet[psmouse->pktcnt++] = data; 353 } 354 355 /* 356 * See if we need to force resync because mouse was idle for 357 * too long. 358 */ 359 if (psmouse->state == PSMOUSE_ACTIVATED && 360 psmouse->pktcnt == 1 && psmouse->resync_time && 361 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 362 psmouse->badbyte = psmouse->packet[0]; 363 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 364 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 365 goto out; 366 } 367 368 psmouse->last = jiffies; 369 psmouse_handle_byte(psmouse); 370 371 out: 372 return IRQ_HANDLED; 373 } 374 375 /* 376 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 377 * using sliced syntax, understood by advanced devices, such as Logitech 378 * or Synaptics touchpads. The command is encoded as: 379 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 380 * is the command. 381 */ 382 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 383 { 384 int i; 385 386 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 387 return -1; 388 389 for (i = 6; i >= 0; i -= 2) { 390 unsigned char d = (command >> i) & 3; 391 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 392 return -1; 393 } 394 395 return 0; 396 } 397 398 /* 399 * psmouse_reset() resets the mouse into power-on state. 400 */ 401 int psmouse_reset(struct psmouse *psmouse) 402 { 403 unsigned char param[2]; 404 405 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 406 return -1; 407 408 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 409 return -1; 410 411 return 0; 412 } 413 414 /* 415 * Here we set the mouse resolution. 416 */ 417 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 418 { 419 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 420 unsigned char p; 421 422 if (resolution == 0 || resolution > 200) 423 resolution = 200; 424 425 p = params[resolution / 50]; 426 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 427 psmouse->resolution = 25 << p; 428 } 429 430 /* 431 * Here we set the mouse report rate. 432 */ 433 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 434 { 435 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 436 unsigned char r; 437 int i = 0; 438 439 while (rates[i] > rate) i++; 440 r = rates[i]; 441 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 442 psmouse->rate = r; 443 } 444 445 /* 446 * Here we set the mouse scaling. 447 */ 448 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale) 449 { 450 ps2_command(&psmouse->ps2dev, NULL, 451 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 : 452 PSMOUSE_CMD_SETSCALE11); 453 } 454 455 /* 456 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it. 457 */ 458 static int psmouse_poll(struct psmouse *psmouse) 459 { 460 return ps2_command(&psmouse->ps2dev, psmouse->packet, 461 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 462 } 463 464 static bool psmouse_check_pnp_id(const char *id, const char * const ids[]) 465 { 466 int i; 467 468 for (i = 0; ids[i]; i++) 469 if (!strcasecmp(id, ids[i])) 470 return true; 471 472 return false; 473 } 474 475 /* 476 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids. 477 */ 478 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[]) 479 { 480 struct serio *serio = psmouse->ps2dev.serio; 481 char *p, *fw_id_copy, *save_ptr; 482 bool found = false; 483 484 if (strncmp(serio->firmware_id, "PNP: ", 5)) 485 return false; 486 487 fw_id_copy = kstrndup(&serio->firmware_id[5], 488 sizeof(serio->firmware_id) - 5, 489 GFP_KERNEL); 490 if (!fw_id_copy) 491 return false; 492 493 save_ptr = fw_id_copy; 494 while ((p = strsep(&fw_id_copy, " ")) != NULL) { 495 if (psmouse_check_pnp_id(p, ids)) { 496 found = true; 497 break; 498 } 499 } 500 501 kfree(save_ptr); 502 return found; 503 } 504 505 /* 506 * Genius NetMouse magic init. 507 */ 508 static int genius_detect(struct psmouse *psmouse, bool set_properties) 509 { 510 struct ps2dev *ps2dev = &psmouse->ps2dev; 511 unsigned char param[4]; 512 513 param[0] = 3; 514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 515 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 516 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 517 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 518 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 519 520 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 521 return -1; 522 523 if (set_properties) { 524 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 525 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 526 __set_bit(BTN_SIDE, psmouse->dev->keybit); 527 __set_bit(REL_WHEEL, psmouse->dev->relbit); 528 529 psmouse->vendor = "Genius"; 530 psmouse->name = "Mouse"; 531 psmouse->pktsize = 4; 532 } 533 534 return 0; 535 } 536 537 /* 538 * IntelliMouse magic init. 539 */ 540 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 541 { 542 struct ps2dev *ps2dev = &psmouse->ps2dev; 543 unsigned char param[2]; 544 545 param[0] = 200; 546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 547 param[0] = 100; 548 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 549 param[0] = 80; 550 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 551 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 552 553 if (param[0] != 3) 554 return -1; 555 556 if (set_properties) { 557 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 558 __set_bit(REL_WHEEL, psmouse->dev->relbit); 559 560 if (!psmouse->vendor) 561 psmouse->vendor = "Generic"; 562 if (!psmouse->name) 563 psmouse->name = "Wheel Mouse"; 564 psmouse->pktsize = 4; 565 } 566 567 return 0; 568 } 569 570 /* 571 * Try IntelliMouse/Explorer magic init. 572 */ 573 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 574 { 575 struct ps2dev *ps2dev = &psmouse->ps2dev; 576 unsigned char param[2]; 577 578 intellimouse_detect(psmouse, 0); 579 580 param[0] = 200; 581 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 582 param[0] = 200; 583 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 584 param[0] = 80; 585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 586 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 587 588 if (param[0] != 4) 589 return -1; 590 591 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 592 param[0] = 200; 593 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 594 param[0] = 80; 595 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 596 param[0] = 40; 597 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 598 599 if (set_properties) { 600 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 601 __set_bit(REL_WHEEL, psmouse->dev->relbit); 602 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 603 __set_bit(BTN_SIDE, psmouse->dev->keybit); 604 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 605 606 if (!psmouse->vendor) 607 psmouse->vendor = "Generic"; 608 if (!psmouse->name) 609 psmouse->name = "Explorer Mouse"; 610 psmouse->pktsize = 4; 611 } 612 613 return 0; 614 } 615 616 /* 617 * Kensington ThinkingMouse / ExpertMouse magic init. 618 */ 619 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 620 { 621 struct ps2dev *ps2dev = &psmouse->ps2dev; 622 unsigned char param[2]; 623 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 624 int i; 625 626 param[0] = 10; 627 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 628 param[0] = 0; 629 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 630 for (i = 0; i < ARRAY_SIZE(seq); i++) { 631 param[0] = seq[i]; 632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 633 } 634 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 635 636 if (param[0] != 2) 637 return -1; 638 639 if (set_properties) { 640 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 641 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 642 643 psmouse->vendor = "Kensington"; 644 psmouse->name = "ThinkingMouse"; 645 } 646 647 return 0; 648 } 649 650 /* 651 * Bare PS/2 protocol "detection". Always succeeds. 652 */ 653 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 654 { 655 if (set_properties) { 656 if (!psmouse->vendor) 657 psmouse->vendor = "Generic"; 658 if (!psmouse->name) 659 psmouse->name = "Mouse"; 660 661 /* 662 * We have no way of figuring true number of buttons so let's 663 * assume that the device has 3. 664 */ 665 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 666 } 667 668 return 0; 669 } 670 671 /* 672 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 673 * must be forced by sysfs protocol writing. 674 */ 675 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 676 { 677 if (set_properties) { 678 psmouse->vendor = "Cortron"; 679 psmouse->name = "PS/2 Trackball"; 680 681 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 682 __set_bit(BTN_SIDE, psmouse->dev->keybit); 683 } 684 685 return 0; 686 } 687 688 static const struct psmouse_protocol psmouse_protocols[] = { 689 { 690 .type = PSMOUSE_PS2, 691 .name = "PS/2", 692 .alias = "bare", 693 .maxproto = true, 694 .ignore_parity = true, 695 .detect = ps2bare_detect, 696 .try_passthru = true, 697 }, 698 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 699 { 700 .type = PSMOUSE_PS2PP, 701 .name = "PS2++", 702 .alias = "logitech", 703 .detect = ps2pp_detect, 704 }, 705 #endif 706 { 707 .type = PSMOUSE_THINKPS, 708 .name = "ThinkPS/2", 709 .alias = "thinkps", 710 .detect = thinking_detect, 711 }, 712 #ifdef CONFIG_MOUSE_PS2_CYPRESS 713 { 714 .type = PSMOUSE_CYPRESS, 715 .name = "CyPS/2", 716 .alias = "cypress", 717 .detect = cypress_detect, 718 .init = cypress_init, 719 }, 720 #endif 721 { 722 .type = PSMOUSE_GENPS, 723 .name = "GenPS/2", 724 .alias = "genius", 725 .detect = genius_detect, 726 }, 727 { 728 .type = PSMOUSE_IMPS, 729 .name = "ImPS/2", 730 .alias = "imps", 731 .maxproto = true, 732 .ignore_parity = true, 733 .detect = intellimouse_detect, 734 .try_passthru = true, 735 }, 736 { 737 .type = PSMOUSE_IMEX, 738 .name = "ImExPS/2", 739 .alias = "exps", 740 .maxproto = true, 741 .ignore_parity = true, 742 .detect = im_explorer_detect, 743 .try_passthru = true, 744 }, 745 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 746 { 747 .type = PSMOUSE_SYNAPTICS, 748 .name = "SynPS/2", 749 .alias = "synaptics", 750 .detect = synaptics_detect, 751 .init = synaptics_init, 752 }, 753 { 754 .type = PSMOUSE_SYNAPTICS_RELATIVE, 755 .name = "SynRelPS/2", 756 .alias = "synaptics-relative", 757 .detect = synaptics_detect, 758 .init = synaptics_init_relative, 759 }, 760 #endif 761 #ifdef CONFIG_MOUSE_PS2_ALPS 762 { 763 .type = PSMOUSE_ALPS, 764 .name = "AlpsPS/2", 765 .alias = "alps", 766 .detect = alps_detect, 767 .init = alps_init, 768 }, 769 #endif 770 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 771 { 772 .type = PSMOUSE_LIFEBOOK, 773 .name = "LBPS/2", 774 .alias = "lifebook", 775 .detect = lifebook_detect, 776 .init = lifebook_init, 777 }, 778 #endif 779 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 780 { 781 .type = PSMOUSE_TRACKPOINT, 782 .name = "TPPS/2", 783 .alias = "trackpoint", 784 .detect = trackpoint_detect, 785 .try_passthru = true, 786 }, 787 #endif 788 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 789 { 790 .type = PSMOUSE_TOUCHKIT_PS2, 791 .name = "touchkitPS/2", 792 .alias = "touchkit", 793 .detect = touchkit_ps2_detect, 794 }, 795 #endif 796 #ifdef CONFIG_MOUSE_PS2_OLPC 797 { 798 .type = PSMOUSE_HGPK, 799 .name = "OLPC HGPK", 800 .alias = "hgpk", 801 .detect = hgpk_detect, 802 }, 803 #endif 804 #ifdef CONFIG_MOUSE_PS2_ELANTECH 805 { 806 .type = PSMOUSE_ELANTECH, 807 .name = "ETPS/2", 808 .alias = "elantech", 809 .detect = elantech_detect, 810 .init = elantech_init, 811 }, 812 #endif 813 #ifdef CONFIG_MOUSE_PS2_SENTELIC 814 { 815 .type = PSMOUSE_FSP, 816 .name = "FSPPS/2", 817 .alias = "fsp", 818 .detect = fsp_detect, 819 .init = fsp_init, 820 }, 821 #endif 822 { 823 .type = PSMOUSE_CORTRON, 824 .name = "CortronPS/2", 825 .alias = "cortps", 826 .detect = cortron_detect, 827 }, 828 #ifdef CONFIG_MOUSE_PS2_FOCALTECH 829 { 830 .type = PSMOUSE_FOCALTECH, 831 .name = "FocalTechPS/2", 832 .alias = "focaltech", 833 .detect = focaltech_detect, 834 .init = focaltech_init, 835 }, 836 #endif 837 #ifdef CONFIG_MOUSE_PS2_VMMOUSE 838 { 839 .type = PSMOUSE_VMMOUSE, 840 .name = VMMOUSE_PSNAME, 841 .alias = "vmmouse", 842 .detect = vmmouse_detect, 843 .init = vmmouse_init, 844 }, 845 #endif 846 #ifdef CONFIG_MOUSE_PS2_BYD 847 { 848 .type = PSMOUSE_BYD, 849 .name = "BYDPS/2", 850 .alias = "byd", 851 .detect = byd_detect, 852 .init = byd_init, 853 }, 854 #endif 855 { 856 .type = PSMOUSE_AUTO, 857 .name = "auto", 858 .alias = "any", 859 .maxproto = true, 860 }, 861 }; 862 863 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type) 864 { 865 int i; 866 867 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 868 if (psmouse_protocols[i].type == type) 869 return &psmouse_protocols[i]; 870 871 return NULL; 872 } 873 874 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 875 { 876 const struct psmouse_protocol *proto; 877 878 proto = __psmouse_protocol_by_type(type); 879 if (proto) 880 return proto; 881 882 WARN_ON(1); 883 return &psmouse_protocols[0]; 884 } 885 886 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 887 { 888 const struct psmouse_protocol *p; 889 int i; 890 891 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 892 p = &psmouse_protocols[i]; 893 894 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 895 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 896 return &psmouse_protocols[i]; 897 } 898 899 return NULL; 900 } 901 902 /* 903 * Apply default settings to the psmouse structure. Most of them will 904 * be overridden by individual protocol initialization routines. 905 */ 906 static void psmouse_apply_defaults(struct psmouse *psmouse) 907 { 908 struct input_dev *input_dev = psmouse->dev; 909 910 memset(input_dev->evbit, 0, sizeof(input_dev->evbit)); 911 memset(input_dev->keybit, 0, sizeof(input_dev->keybit)); 912 memset(input_dev->relbit, 0, sizeof(input_dev->relbit)); 913 memset(input_dev->absbit, 0, sizeof(input_dev->absbit)); 914 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit)); 915 916 __set_bit(EV_KEY, input_dev->evbit); 917 __set_bit(EV_REL, input_dev->evbit); 918 919 __set_bit(BTN_LEFT, input_dev->keybit); 920 __set_bit(BTN_RIGHT, input_dev->keybit); 921 922 __set_bit(REL_X, input_dev->relbit); 923 __set_bit(REL_Y, input_dev->relbit); 924 925 __set_bit(INPUT_PROP_POINTER, input_dev->propbit); 926 927 psmouse->set_rate = psmouse_set_rate; 928 psmouse->set_resolution = psmouse_set_resolution; 929 psmouse->set_scale = psmouse_set_scale; 930 psmouse->poll = psmouse_poll; 931 psmouse->protocol_handler = psmouse_process_byte; 932 psmouse->pktsize = 3; 933 psmouse->reconnect = NULL; 934 psmouse->disconnect = NULL; 935 psmouse->cleanup = NULL; 936 psmouse->pt_activate = NULL; 937 psmouse->pt_deactivate = NULL; 938 } 939 940 static bool psmouse_try_protocol(struct psmouse *psmouse, 941 enum psmouse_type type, 942 unsigned int *max_proto, 943 bool set_properties, bool init_allowed) 944 { 945 const struct psmouse_protocol *proto; 946 947 proto = __psmouse_protocol_by_type(type); 948 if (!proto) 949 return false; 950 951 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 952 !proto->try_passthru) { 953 return false; 954 } 955 956 if (set_properties) 957 psmouse_apply_defaults(psmouse); 958 959 if (proto->detect(psmouse, set_properties) != 0) 960 return false; 961 962 if (set_properties && proto->init && init_allowed) { 963 if (proto->init(psmouse) != 0) { 964 /* 965 * We detected device, but init failed. Adjust 966 * max_proto so we only try standard protocols. 967 */ 968 if (*max_proto > PSMOUSE_IMEX) 969 *max_proto = PSMOUSE_IMEX; 970 971 return false; 972 } 973 } 974 975 return true; 976 } 977 978 /* 979 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 980 * the mouse may have. 981 */ 982 static int psmouse_extensions(struct psmouse *psmouse, 983 unsigned int max_proto, bool set_properties) 984 { 985 bool synaptics_hardware = false; 986 987 /* 988 * Always check for focaltech, this is safe as it uses pnp-id 989 * matching. 990 */ 991 if (psmouse_try_protocol(psmouse, PSMOUSE_FOCALTECH, 992 &max_proto, set_properties, false)) { 993 if (max_proto > PSMOUSE_IMEX && 994 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 995 (!set_properties || focaltech_init(psmouse) == 0)) { 996 return PSMOUSE_FOCALTECH; 997 } 998 /* 999 * Restrict psmouse_max_proto so that psmouse_initialize() 1000 * does not try to reset rate and resolution, because even 1001 * that upsets the device. 1002 * This also causes us to basically fall through to basic 1003 * protocol detection, where we fully reset the mouse, 1004 * and set it up as bare PS/2 protocol device. 1005 */ 1006 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1007 } 1008 1009 /* 1010 * We always check for LifeBook because it does not disturb mouse 1011 * (it only checks DMI information). 1012 */ 1013 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1014 set_properties, max_proto > PSMOUSE_IMEX)) 1015 return PSMOUSE_LIFEBOOK; 1016 1017 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1018 set_properties, max_proto > PSMOUSE_IMEX)) 1019 return PSMOUSE_VMMOUSE; 1020 1021 /* 1022 * Try Kensington ThinkingMouse (we try first, because Synaptics 1023 * probe upsets the ThinkingMouse). 1024 */ 1025 if (max_proto > PSMOUSE_IMEX && 1026 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1027 set_properties, true)) { 1028 return PSMOUSE_THINKPS; 1029 } 1030 1031 /* 1032 * Try Synaptics TouchPad. Note that probing is done even if 1033 * Synaptics protocol support is disabled in config - we need to 1034 * know if it is Synaptics so we can reset it properly after 1035 * probing for IntelliMouse. 1036 */ 1037 if (max_proto > PSMOUSE_PS2 && 1038 psmouse_try_protocol(psmouse, PSMOUSE_SYNAPTICS, &max_proto, 1039 set_properties, false)) { 1040 synaptics_hardware = true; 1041 1042 if (max_proto > PSMOUSE_IMEX) { 1043 /* 1044 * Try activating protocol, but check if support is 1045 * enabled first, since we try detecting Synaptics 1046 * even when protocol is disabled. 1047 */ 1048 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) && 1049 (!set_properties || synaptics_init(psmouse) == 0)) { 1050 return PSMOUSE_SYNAPTICS; 1051 } 1052 1053 /* 1054 * Some Synaptics touchpads can emulate extended 1055 * protocols (like IMPS/2). Unfortunately 1056 * Logitech/Genius probes confuse some firmware 1057 * versions so we'll have to skip them. 1058 */ 1059 max_proto = PSMOUSE_IMEX; 1060 } 1061 1062 /* 1063 * Make sure that touchpad is in relative mode, gestures 1064 * (taps) are enabled. 1065 */ 1066 synaptics_reset(psmouse); 1067 } 1068 1069 /* 1070 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1071 * because Finger Sensing Pad probe upsets some modules of Cypress 1072 * Trackpads. 1073 */ 1074 if (max_proto > PSMOUSE_IMEX && 1075 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1076 set_properties, true)) { 1077 return PSMOUSE_CYPRESS; 1078 } 1079 1080 /* Try ALPS TouchPad */ 1081 if (max_proto > PSMOUSE_IMEX) { 1082 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1083 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1084 &max_proto, set_properties, true)) 1085 return PSMOUSE_ALPS; 1086 } 1087 1088 /* Try OLPC HGPK touchpad */ 1089 if (max_proto > PSMOUSE_IMEX && 1090 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1091 set_properties, true)) { 1092 return PSMOUSE_HGPK; 1093 } 1094 1095 /* Try Elantech touchpad */ 1096 if (max_proto > PSMOUSE_IMEX && 1097 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1098 &max_proto, set_properties, true)) { 1099 return PSMOUSE_ELANTECH; 1100 } 1101 1102 if (max_proto > PSMOUSE_IMEX) { 1103 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1104 &max_proto, set_properties, true)) 1105 return PSMOUSE_GENPS; 1106 1107 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1108 &max_proto, set_properties, true)) 1109 return PSMOUSE_PS2PP; 1110 1111 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1112 &max_proto, set_properties, true)) 1113 return PSMOUSE_TRACKPOINT; 1114 1115 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1116 &max_proto, set_properties, true)) 1117 return PSMOUSE_TOUCHKIT_PS2; 1118 1119 if (psmouse_try_protocol(psmouse, PSMOUSE_BYD, 1120 &max_proto, set_properties, true)) 1121 return PSMOUSE_BYD; 1122 } 1123 1124 /* 1125 * Try Finger Sensing Pad. We do it here because its probe upsets 1126 * Trackpoint devices (causing TP_READ_ID command to time out). 1127 */ 1128 if (max_proto > PSMOUSE_IMEX && 1129 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1130 &max_proto, set_properties, true)) { 1131 return PSMOUSE_FSP; 1132 } 1133 1134 /* 1135 * Reset to defaults in case the device got confused by extended 1136 * protocol probes. Note that we follow up with full reset because 1137 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1138 */ 1139 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1140 psmouse_reset(psmouse); 1141 1142 if (max_proto >= PSMOUSE_IMEX && 1143 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1144 &max_proto, set_properties, true)) { 1145 return PSMOUSE_IMEX; 1146 } 1147 1148 if (max_proto >= PSMOUSE_IMPS && 1149 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1150 &max_proto, set_properties, true)) { 1151 return PSMOUSE_IMPS; 1152 } 1153 1154 /* 1155 * Okay, all failed, we have a standard mouse here. The number of 1156 * the buttons is still a question, though. We assume 3. 1157 */ 1158 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1159 &max_proto, set_properties, true); 1160 1161 if (synaptics_hardware) { 1162 /* 1163 * We detected Synaptics hardware but it did not respond to 1164 * IMPS/2 probes. We need to reset the touchpad because if 1165 * there is a track point on the pass through port it could 1166 * get disabled while probing for protocol extensions. 1167 */ 1168 psmouse_reset(psmouse); 1169 } 1170 1171 return PSMOUSE_PS2; 1172 } 1173 1174 /* 1175 * psmouse_probe() probes for a PS/2 mouse. 1176 */ 1177 static int psmouse_probe(struct psmouse *psmouse) 1178 { 1179 struct ps2dev *ps2dev = &psmouse->ps2dev; 1180 unsigned char param[2]; 1181 1182 /* 1183 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1184 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1185 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1186 * subsequent ID queries, probably due to a firmware bug. 1187 */ 1188 param[0] = 0xa5; 1189 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 1190 return -1; 1191 1192 if (param[0] != 0x00 && param[0] != 0x03 && 1193 param[0] != 0x04 && param[0] != 0xff) 1194 return -1; 1195 1196 /* 1197 * Then we reset and disable the mouse so that it doesn't generate 1198 * events. 1199 */ 1200 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 1201 psmouse_warn(psmouse, "Failed to reset mouse on %s\n", 1202 ps2dev->serio->phys); 1203 1204 return 0; 1205 } 1206 1207 /* 1208 * psmouse_initialize() initializes the mouse to a sane state. 1209 */ 1210 static void psmouse_initialize(struct psmouse *psmouse) 1211 { 1212 /* 1213 * We set the mouse report rate, resolution and scaling. 1214 */ 1215 if (psmouse_max_proto != PSMOUSE_PS2) { 1216 psmouse->set_rate(psmouse, psmouse->rate); 1217 psmouse->set_resolution(psmouse, psmouse->resolution); 1218 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1219 } 1220 } 1221 1222 /* 1223 * psmouse_activate() enables the mouse so that we get motion reports from it. 1224 */ 1225 int psmouse_activate(struct psmouse *psmouse) 1226 { 1227 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1228 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1229 psmouse->ps2dev.serio->phys); 1230 return -1; 1231 } 1232 1233 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1234 return 0; 1235 } 1236 1237 /* 1238 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1239 * motion reports from it unless we explicitly request it. 1240 */ 1241 int psmouse_deactivate(struct psmouse *psmouse) 1242 { 1243 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) { 1244 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n", 1245 psmouse->ps2dev.serio->phys); 1246 return -1; 1247 } 1248 1249 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1250 return 0; 1251 } 1252 1253 /* 1254 * psmouse_resync() attempts to re-validate current protocol. 1255 */ 1256 static void psmouse_resync(struct work_struct *work) 1257 { 1258 struct psmouse *parent = NULL, *psmouse = 1259 container_of(work, struct psmouse, resync_work.work); 1260 struct serio *serio = psmouse->ps2dev.serio; 1261 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1262 bool failed = false, enabled = false; 1263 int i; 1264 1265 mutex_lock(&psmouse_mutex); 1266 1267 if (psmouse->state != PSMOUSE_RESYNCING) 1268 goto out; 1269 1270 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1271 parent = serio_get_drvdata(serio->parent); 1272 psmouse_deactivate(parent); 1273 } 1274 1275 /* 1276 * Some mice don't ACK commands sent while they are in the middle of 1277 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1278 * instead of ps2_command() which would wait for 200ms for an ACK 1279 * that may never come. 1280 * As an additional quirk ALPS touchpads may not only forget to ACK 1281 * disable command but will stop reporting taps, so if we see that 1282 * mouse at least once ACKs disable we will do full reconnect if ACK 1283 * is missing. 1284 */ 1285 psmouse->num_resyncs++; 1286 1287 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1288 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1289 failed = true; 1290 } else 1291 psmouse->acks_disable_command = true; 1292 1293 /* 1294 * Poll the mouse. If it was reset the packet will be shorter than 1295 * psmouse->pktsize and ps2_command will fail. We do not expect and 1296 * do not handle scenario when mouse "upgrades" its protocol while 1297 * disconnected since it would require additional delay. If we ever 1298 * see a mouse that does it we'll adjust the code. 1299 */ 1300 if (!failed) { 1301 if (psmouse->poll(psmouse)) 1302 failed = true; 1303 else { 1304 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1305 for (i = 0; i < psmouse->pktsize; i++) { 1306 psmouse->pktcnt++; 1307 rc = psmouse->protocol_handler(psmouse); 1308 if (rc != PSMOUSE_GOOD_DATA) 1309 break; 1310 } 1311 if (rc != PSMOUSE_FULL_PACKET) 1312 failed = true; 1313 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1314 } 1315 } 1316 1317 /* 1318 * Now try to enable mouse. We try to do that even if poll failed 1319 * and also repeat our attempts 5 times, otherwise we may be left 1320 * out with disabled mouse. 1321 */ 1322 for (i = 0; i < 5; i++) { 1323 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1324 enabled = true; 1325 break; 1326 } 1327 msleep(200); 1328 } 1329 1330 if (!enabled) { 1331 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1332 psmouse->ps2dev.serio->phys); 1333 failed = true; 1334 } 1335 1336 if (failed) { 1337 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1338 psmouse_info(psmouse, 1339 "resync failed, issuing reconnect request\n"); 1340 serio_reconnect(serio); 1341 } else 1342 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1343 1344 if (parent) 1345 psmouse_activate(parent); 1346 out: 1347 mutex_unlock(&psmouse_mutex); 1348 } 1349 1350 /* 1351 * psmouse_cleanup() resets the mouse into power-on state. 1352 */ 1353 static void psmouse_cleanup(struct serio *serio) 1354 { 1355 struct psmouse *psmouse = serio_get_drvdata(serio); 1356 struct psmouse *parent = NULL; 1357 1358 mutex_lock(&psmouse_mutex); 1359 1360 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1361 parent = serio_get_drvdata(serio->parent); 1362 psmouse_deactivate(parent); 1363 } 1364 1365 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1366 1367 /* 1368 * Disable stream mode so cleanup routine can proceed undisturbed. 1369 */ 1370 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1371 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1372 psmouse->ps2dev.serio->phys); 1373 1374 if (psmouse->cleanup) 1375 psmouse->cleanup(psmouse); 1376 1377 /* 1378 * Reset the mouse to defaults (bare PS/2 protocol). 1379 */ 1380 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1381 1382 /* 1383 * Some boxes, such as HP nx7400, get terribly confused if mouse 1384 * is not fully enabled before suspending/shutting down. 1385 */ 1386 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1387 1388 if (parent) { 1389 if (parent->pt_deactivate) 1390 parent->pt_deactivate(parent); 1391 1392 psmouse_activate(parent); 1393 } 1394 1395 mutex_unlock(&psmouse_mutex); 1396 } 1397 1398 /* 1399 * psmouse_disconnect() closes and frees. 1400 */ 1401 static void psmouse_disconnect(struct serio *serio) 1402 { 1403 struct psmouse *psmouse, *parent = NULL; 1404 1405 psmouse = serio_get_drvdata(serio); 1406 1407 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1408 1409 mutex_lock(&psmouse_mutex); 1410 1411 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1412 1413 /* make sure we don't have a resync in progress */ 1414 mutex_unlock(&psmouse_mutex); 1415 flush_workqueue(kpsmoused_wq); 1416 mutex_lock(&psmouse_mutex); 1417 1418 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1419 parent = serio_get_drvdata(serio->parent); 1420 psmouse_deactivate(parent); 1421 } 1422 1423 if (psmouse->disconnect) 1424 psmouse->disconnect(psmouse); 1425 1426 if (parent && parent->pt_deactivate) 1427 parent->pt_deactivate(parent); 1428 1429 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1430 1431 serio_close(serio); 1432 serio_set_drvdata(serio, NULL); 1433 input_unregister_device(psmouse->dev); 1434 kfree(psmouse); 1435 1436 if (parent) 1437 psmouse_activate(parent); 1438 1439 mutex_unlock(&psmouse_mutex); 1440 } 1441 1442 static int psmouse_switch_protocol(struct psmouse *psmouse, 1443 const struct psmouse_protocol *proto) 1444 { 1445 const struct psmouse_protocol *selected_proto; 1446 struct input_dev *input_dev = psmouse->dev; 1447 1448 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1449 1450 if (proto && (proto->detect || proto->init)) { 1451 psmouse_apply_defaults(psmouse); 1452 1453 if (proto->detect && proto->detect(psmouse, true) < 0) 1454 return -1; 1455 1456 if (proto->init && proto->init(psmouse) < 0) 1457 return -1; 1458 1459 psmouse->type = proto->type; 1460 selected_proto = proto; 1461 } else { 1462 psmouse->type = psmouse_extensions(psmouse, 1463 psmouse_max_proto, true); 1464 selected_proto = psmouse_protocol_by_type(psmouse->type); 1465 } 1466 1467 psmouse->ignore_parity = selected_proto->ignore_parity; 1468 1469 /* 1470 * If mouse's packet size is 3 there is no point in polling the 1471 * device in hopes to detect protocol reset - we won't get less 1472 * than 3 bytes response anyhow. 1473 */ 1474 if (psmouse->pktsize == 3) 1475 psmouse->resync_time = 0; 1476 1477 /* 1478 * Some smart KVMs fake response to POLL command returning just 1479 * 3 bytes and messing up our resync logic, so if initial poll 1480 * fails we won't try polling the device anymore. Hopefully 1481 * such KVM will maintain initially selected protocol. 1482 */ 1483 if (psmouse->resync_time && psmouse->poll(psmouse)) 1484 psmouse->resync_time = 0; 1485 1486 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1487 selected_proto->name, psmouse->vendor, psmouse->name); 1488 1489 input_dev->name = psmouse->devname; 1490 input_dev->phys = psmouse->phys; 1491 input_dev->id.bustype = BUS_I8042; 1492 input_dev->id.vendor = 0x0002; 1493 input_dev->id.product = psmouse->type; 1494 input_dev->id.version = psmouse->model; 1495 1496 return 0; 1497 } 1498 1499 /* 1500 * psmouse_connect() is a callback from the serio module when 1501 * an unhandled serio port is found. 1502 */ 1503 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1504 { 1505 struct psmouse *psmouse, *parent = NULL; 1506 struct input_dev *input_dev; 1507 int retval = 0, error = -ENOMEM; 1508 1509 mutex_lock(&psmouse_mutex); 1510 1511 /* 1512 * If this is a pass-through port deactivate parent so the device 1513 * connected to this port can be successfully identified 1514 */ 1515 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1516 parent = serio_get_drvdata(serio->parent); 1517 psmouse_deactivate(parent); 1518 } 1519 1520 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1521 input_dev = input_allocate_device(); 1522 if (!psmouse || !input_dev) 1523 goto err_free; 1524 1525 ps2_init(&psmouse->ps2dev, serio); 1526 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1527 psmouse->dev = input_dev; 1528 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1529 1530 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1531 1532 serio_set_drvdata(serio, psmouse); 1533 1534 error = serio_open(serio, drv); 1535 if (error) 1536 goto err_clear_drvdata; 1537 1538 /* give PT device some time to settle down before probing */ 1539 if (serio->id.type == SERIO_PS_PSTHRU) 1540 usleep_range(10000, 15000); 1541 1542 if (psmouse_probe(psmouse) < 0) { 1543 error = -ENODEV; 1544 goto err_close_serio; 1545 } 1546 1547 psmouse->rate = psmouse_rate; 1548 psmouse->resolution = psmouse_resolution; 1549 psmouse->resetafter = psmouse_resetafter; 1550 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1551 psmouse->smartscroll = psmouse_smartscroll; 1552 1553 psmouse_switch_protocol(psmouse, NULL); 1554 1555 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1556 psmouse_initialize(psmouse); 1557 1558 error = input_register_device(psmouse->dev); 1559 if (error) 1560 goto err_protocol_disconnect; 1561 1562 if (parent && parent->pt_activate) 1563 parent->pt_activate(parent); 1564 1565 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1566 if (error) 1567 goto err_pt_deactivate; 1568 1569 psmouse_activate(psmouse); 1570 1571 out: 1572 /* If this is a pass-through port the parent needs to be re-activated */ 1573 if (parent) 1574 psmouse_activate(parent); 1575 1576 mutex_unlock(&psmouse_mutex); 1577 return retval; 1578 1579 err_pt_deactivate: 1580 if (parent && parent->pt_deactivate) 1581 parent->pt_deactivate(parent); 1582 input_unregister_device(psmouse->dev); 1583 input_dev = NULL; /* so we don't try to free it below */ 1584 err_protocol_disconnect: 1585 if (psmouse->disconnect) 1586 psmouse->disconnect(psmouse); 1587 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1588 err_close_serio: 1589 serio_close(serio); 1590 err_clear_drvdata: 1591 serio_set_drvdata(serio, NULL); 1592 err_free: 1593 input_free_device(input_dev); 1594 kfree(psmouse); 1595 1596 retval = error; 1597 goto out; 1598 } 1599 1600 static int psmouse_reconnect(struct serio *serio) 1601 { 1602 struct psmouse *psmouse = serio_get_drvdata(serio); 1603 struct psmouse *parent = NULL; 1604 unsigned char type; 1605 int rc = -1; 1606 1607 mutex_lock(&psmouse_mutex); 1608 1609 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1610 parent = serio_get_drvdata(serio->parent); 1611 psmouse_deactivate(parent); 1612 } 1613 1614 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1615 1616 if (psmouse->reconnect) { 1617 if (psmouse->reconnect(psmouse)) 1618 goto out; 1619 } else { 1620 psmouse_reset(psmouse); 1621 1622 if (psmouse_probe(psmouse) < 0) 1623 goto out; 1624 1625 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1626 if (psmouse->type != type) 1627 goto out; 1628 } 1629 1630 /* 1631 * OK, the device type (and capabilities) match the old one, 1632 * we can continue using it, complete initialization 1633 */ 1634 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1635 1636 psmouse_initialize(psmouse); 1637 1638 if (parent && parent->pt_activate) 1639 parent->pt_activate(parent); 1640 1641 psmouse_activate(psmouse); 1642 rc = 0; 1643 1644 out: 1645 /* If this is a pass-through port the parent waits to be activated */ 1646 if (parent) 1647 psmouse_activate(parent); 1648 1649 mutex_unlock(&psmouse_mutex); 1650 return rc; 1651 } 1652 1653 static struct serio_device_id psmouse_serio_ids[] = { 1654 { 1655 .type = SERIO_8042, 1656 .proto = SERIO_ANY, 1657 .id = SERIO_ANY, 1658 .extra = SERIO_ANY, 1659 }, 1660 { 1661 .type = SERIO_PS_PSTHRU, 1662 .proto = SERIO_ANY, 1663 .id = SERIO_ANY, 1664 .extra = SERIO_ANY, 1665 }, 1666 { 0 } 1667 }; 1668 1669 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1670 1671 static struct serio_driver psmouse_drv = { 1672 .driver = { 1673 .name = "psmouse", 1674 }, 1675 .description = DRIVER_DESC, 1676 .id_table = psmouse_serio_ids, 1677 .interrupt = psmouse_interrupt, 1678 .connect = psmouse_connect, 1679 .reconnect = psmouse_reconnect, 1680 .disconnect = psmouse_disconnect, 1681 .cleanup = psmouse_cleanup, 1682 }; 1683 1684 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1685 char *buf) 1686 { 1687 struct serio *serio = to_serio_port(dev); 1688 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1689 struct psmouse *psmouse; 1690 1691 psmouse = serio_get_drvdata(serio); 1692 1693 return attr->show(psmouse, attr->data, buf); 1694 } 1695 1696 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1697 const char *buf, size_t count) 1698 { 1699 struct serio *serio = to_serio_port(dev); 1700 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1701 struct psmouse *psmouse, *parent = NULL; 1702 int retval; 1703 1704 retval = mutex_lock_interruptible(&psmouse_mutex); 1705 if (retval) 1706 goto out; 1707 1708 psmouse = serio_get_drvdata(serio); 1709 1710 if (attr->protect) { 1711 if (psmouse->state == PSMOUSE_IGNORE) { 1712 retval = -ENODEV; 1713 goto out_unlock; 1714 } 1715 1716 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1717 parent = serio_get_drvdata(serio->parent); 1718 psmouse_deactivate(parent); 1719 } 1720 1721 psmouse_deactivate(psmouse); 1722 } 1723 1724 retval = attr->set(psmouse, attr->data, buf, count); 1725 1726 if (attr->protect) { 1727 if (retval != -ENODEV) 1728 psmouse_activate(psmouse); 1729 1730 if (parent) 1731 psmouse_activate(parent); 1732 } 1733 1734 out_unlock: 1735 mutex_unlock(&psmouse_mutex); 1736 out: 1737 return retval; 1738 } 1739 1740 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1741 { 1742 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1743 1744 return sprintf(buf, "%u\n", *field); 1745 } 1746 1747 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1748 { 1749 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1750 unsigned int value; 1751 int err; 1752 1753 err = kstrtouint(buf, 10, &value); 1754 if (err) 1755 return err; 1756 1757 *field = value; 1758 1759 return count; 1760 } 1761 1762 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1763 { 1764 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1765 } 1766 1767 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1768 { 1769 struct serio *serio = psmouse->ps2dev.serio; 1770 struct psmouse *parent = NULL; 1771 struct input_dev *old_dev, *new_dev; 1772 const struct psmouse_protocol *proto, *old_proto; 1773 int error; 1774 int retry = 0; 1775 1776 proto = psmouse_protocol_by_name(buf, count); 1777 if (!proto) 1778 return -EINVAL; 1779 1780 if (psmouse->type == proto->type) 1781 return count; 1782 1783 new_dev = input_allocate_device(); 1784 if (!new_dev) 1785 return -ENOMEM; 1786 1787 while (!list_empty(&serio->children)) { 1788 if (++retry > 3) { 1789 psmouse_warn(psmouse, 1790 "failed to destroy children ports, protocol change aborted.\n"); 1791 input_free_device(new_dev); 1792 return -EIO; 1793 } 1794 1795 mutex_unlock(&psmouse_mutex); 1796 serio_unregister_child_port(serio); 1797 mutex_lock(&psmouse_mutex); 1798 1799 if (serio->drv != &psmouse_drv) { 1800 input_free_device(new_dev); 1801 return -ENODEV; 1802 } 1803 1804 if (psmouse->type == proto->type) { 1805 input_free_device(new_dev); 1806 return count; /* switched by other thread */ 1807 } 1808 } 1809 1810 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1811 parent = serio_get_drvdata(serio->parent); 1812 if (parent->pt_deactivate) 1813 parent->pt_deactivate(parent); 1814 } 1815 1816 old_dev = psmouse->dev; 1817 old_proto = psmouse_protocol_by_type(psmouse->type); 1818 1819 if (psmouse->disconnect) 1820 psmouse->disconnect(psmouse); 1821 1822 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1823 1824 psmouse->dev = new_dev; 1825 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1826 1827 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1828 psmouse_reset(psmouse); 1829 /* default to PSMOUSE_PS2 */ 1830 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1831 } 1832 1833 psmouse_initialize(psmouse); 1834 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1835 1836 error = input_register_device(psmouse->dev); 1837 if (error) { 1838 if (psmouse->disconnect) 1839 psmouse->disconnect(psmouse); 1840 1841 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1842 input_free_device(new_dev); 1843 psmouse->dev = old_dev; 1844 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1845 psmouse_switch_protocol(psmouse, old_proto); 1846 psmouse_initialize(psmouse); 1847 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1848 1849 return error; 1850 } 1851 1852 input_unregister_device(old_dev); 1853 1854 if (parent && parent->pt_activate) 1855 parent->pt_activate(parent); 1856 1857 return count; 1858 } 1859 1860 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1861 { 1862 unsigned int value; 1863 int err; 1864 1865 err = kstrtouint(buf, 10, &value); 1866 if (err) 1867 return err; 1868 1869 psmouse->set_rate(psmouse, value); 1870 return count; 1871 } 1872 1873 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1874 { 1875 unsigned int value; 1876 int err; 1877 1878 err = kstrtouint(buf, 10, &value); 1879 if (err) 1880 return err; 1881 1882 psmouse->set_resolution(psmouse, value); 1883 return count; 1884 } 1885 1886 1887 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 1888 { 1889 const struct psmouse_protocol *proto; 1890 1891 if (!val) 1892 return -EINVAL; 1893 1894 proto = psmouse_protocol_by_name(val, strlen(val)); 1895 1896 if (!proto || !proto->maxproto) 1897 return -EINVAL; 1898 1899 *((unsigned int *)kp->arg) = proto->type; 1900 1901 return 0; 1902 } 1903 1904 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 1905 { 1906 int type = *((unsigned int *)kp->arg); 1907 1908 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1909 } 1910 1911 static int __init psmouse_init(void) 1912 { 1913 int err; 1914 1915 lifebook_module_init(); 1916 synaptics_module_init(); 1917 hgpk_module_init(); 1918 1919 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1920 if (!kpsmoused_wq) { 1921 pr_err("failed to create kpsmoused workqueue\n"); 1922 return -ENOMEM; 1923 } 1924 1925 err = serio_register_driver(&psmouse_drv); 1926 if (err) 1927 destroy_workqueue(kpsmoused_wq); 1928 1929 return err; 1930 } 1931 1932 static void __exit psmouse_exit(void) 1933 { 1934 serio_unregister_driver(&psmouse_drv); 1935 destroy_workqueue(kpsmoused_wq); 1936 } 1937 1938 module_init(psmouse_init); 1939 module_exit(psmouse_exit); 1940