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 38 #define DRIVER_DESC "PS/2 mouse driver" 39 40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 41 MODULE_DESCRIPTION(DRIVER_DESC); 42 MODULE_LICENSE("GPL"); 43 44 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 45 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 46 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 47 static struct kernel_param_ops param_ops_proto_abbrev = { 48 .set = psmouse_set_maxproto, 49 .get = psmouse_get_maxproto, 50 }; 51 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 52 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 53 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 54 55 static unsigned int psmouse_resolution = 200; 56 module_param_named(resolution, psmouse_resolution, uint, 0644); 57 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 58 59 static unsigned int psmouse_rate = 100; 60 module_param_named(rate, psmouse_rate, uint, 0644); 61 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 62 63 static unsigned int psmouse_smartscroll = 1; 64 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 65 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 66 67 static unsigned int psmouse_resetafter = 5; 68 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 69 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 70 71 static unsigned int psmouse_resync_time; 72 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 73 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 74 75 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 76 NULL, 77 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 78 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 79 (void *) offsetof(struct psmouse, rate), 80 psmouse_show_int_attr, psmouse_attr_set_rate); 81 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 82 (void *) offsetof(struct psmouse, resolution), 83 psmouse_show_int_attr, psmouse_attr_set_resolution); 84 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 85 (void *) offsetof(struct psmouse, resetafter), 86 psmouse_show_int_attr, psmouse_set_int_attr); 87 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 88 (void *) offsetof(struct psmouse, resync_time), 89 psmouse_show_int_attr, psmouse_set_int_attr); 90 91 static struct attribute *psmouse_attributes[] = { 92 &psmouse_attr_protocol.dattr.attr, 93 &psmouse_attr_rate.dattr.attr, 94 &psmouse_attr_resolution.dattr.attr, 95 &psmouse_attr_resetafter.dattr.attr, 96 &psmouse_attr_resync_time.dattr.attr, 97 NULL 98 }; 99 100 static struct attribute_group psmouse_attribute_group = { 101 .attrs = psmouse_attributes, 102 }; 103 104 /* 105 * psmouse_mutex protects all operations changing state of mouse 106 * (connecting, disconnecting, changing rate or resolution via 107 * sysfs). We could use a per-device semaphore but since there 108 * rarely more than one PS/2 mouse connected and since semaphore 109 * is taken in "slow" paths it is not worth it. 110 */ 111 static DEFINE_MUTEX(psmouse_mutex); 112 113 static struct workqueue_struct *kpsmoused_wq; 114 115 struct psmouse_protocol { 116 enum psmouse_type type; 117 bool maxproto; 118 bool ignore_parity; /* Protocol should ignore parity errors from KBC */ 119 const char *name; 120 const char *alias; 121 int (*detect)(struct psmouse *, bool); 122 int (*init)(struct psmouse *); 123 }; 124 125 /* 126 * psmouse_process_byte() analyzes the PS/2 data stream and reports 127 * relevant events to the input module once full packet has arrived. 128 */ 129 130 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 131 { 132 struct input_dev *dev = psmouse->dev; 133 unsigned char *packet = psmouse->packet; 134 135 if (psmouse->pktcnt < psmouse->pktsize) 136 return PSMOUSE_GOOD_DATA; 137 138 /* 139 * Full packet accumulated, process it 140 */ 141 142 /* 143 * Scroll wheel on IntelliMice, scroll buttons on NetMice 144 */ 145 146 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 147 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 148 149 /* 150 * Scroll wheel and buttons on IntelliMouse Explorer 151 */ 152 153 if (psmouse->type == PSMOUSE_IMEX) { 154 switch (packet[3] & 0xC0) { 155 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 156 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 157 break; 158 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 159 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 160 break; 161 case 0x00: 162 case 0xC0: 163 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 164 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 165 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 166 break; 167 } 168 } 169 170 /* 171 * Extra buttons on Genius NewNet 3D 172 */ 173 174 if (psmouse->type == PSMOUSE_GENPS) { 175 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 176 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 177 } 178 179 /* 180 * Extra button on ThinkingMouse 181 */ 182 if (psmouse->type == PSMOUSE_THINKPS) { 183 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 184 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 185 packet[1] |= (packet[0] & 0x40) << 1; 186 } 187 188 /* 189 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 190 * byte. 191 */ 192 if (psmouse->type == PSMOUSE_CORTRON) { 193 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 194 packet[0] |= 0x08; 195 } 196 197 /* 198 * Generic PS/2 Mouse 199 */ 200 201 input_report_key(dev, BTN_LEFT, packet[0] & 1); 202 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 203 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 204 205 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 206 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 207 208 input_sync(dev); 209 210 return PSMOUSE_FULL_PACKET; 211 } 212 213 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 214 unsigned long delay) 215 { 216 queue_delayed_work(kpsmoused_wq, work, delay); 217 } 218 219 /* 220 * __psmouse_set_state() sets new psmouse state and resets all flags. 221 */ 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 /* 233 * psmouse_set_state() sets new psmouse state and resets all flags and 234 * counters while holding serio lock so fighting with interrupt handler 235 * is not a concern. 236 */ 237 238 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 239 { 240 serio_pause_rx(psmouse->ps2dev.serio); 241 __psmouse_set_state(psmouse, new_state); 242 serio_continue_rx(psmouse->ps2dev.serio); 243 } 244 245 /* 246 * psmouse_handle_byte() processes one byte of the input data stream 247 * by calling corresponding protocol handler. 248 */ 249 250 static int psmouse_handle_byte(struct psmouse *psmouse) 251 { 252 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 253 254 switch (rc) { 255 case PSMOUSE_BAD_DATA: 256 if (psmouse->state == PSMOUSE_ACTIVATED) { 257 psmouse_warn(psmouse, 258 "%s at %s lost sync at byte %d\n", 259 psmouse->name, psmouse->phys, 260 psmouse->pktcnt); 261 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 262 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 263 psmouse_notice(psmouse, 264 "issuing reconnect request\n"); 265 serio_reconnect(psmouse->ps2dev.serio); 266 return -1; 267 } 268 } 269 psmouse->pktcnt = 0; 270 break; 271 272 case PSMOUSE_FULL_PACKET: 273 psmouse->pktcnt = 0; 274 if (psmouse->out_of_sync_cnt) { 275 psmouse->out_of_sync_cnt = 0; 276 psmouse_notice(psmouse, 277 "%s at %s - driver resynced.\n", 278 psmouse->name, psmouse->phys); 279 } 280 break; 281 282 case PSMOUSE_GOOD_DATA: 283 break; 284 } 285 return 0; 286 } 287 288 /* 289 * psmouse_interrupt() handles incoming characters, either passing them 290 * for normal processing or gathering them as command response. 291 */ 292 293 static irqreturn_t psmouse_interrupt(struct serio *serio, 294 unsigned char data, unsigned int flags) 295 { 296 struct psmouse *psmouse = serio_get_drvdata(serio); 297 298 if (psmouse->state == PSMOUSE_IGNORE) 299 goto out; 300 301 if (unlikely((flags & SERIO_TIMEOUT) || 302 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) { 303 304 if (psmouse->state == PSMOUSE_ACTIVATED) 305 psmouse_warn(psmouse, 306 "bad data from KBC -%s%s\n", 307 flags & SERIO_TIMEOUT ? " timeout" : "", 308 flags & SERIO_PARITY ? " bad parity" : ""); 309 ps2_cmd_aborted(&psmouse->ps2dev); 310 goto out; 311 } 312 313 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 314 if (ps2_handle_ack(&psmouse->ps2dev, data)) 315 goto out; 316 317 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 318 if (ps2_handle_response(&psmouse->ps2dev, data)) 319 goto out; 320 321 if (psmouse->state <= PSMOUSE_RESYNCING) 322 goto out; 323 324 if (psmouse->state == PSMOUSE_ACTIVATED && 325 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 326 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 327 psmouse->name, psmouse->phys, psmouse->pktcnt); 328 psmouse->badbyte = psmouse->packet[0]; 329 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 330 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 331 goto out; 332 } 333 334 psmouse->packet[psmouse->pktcnt++] = data; 335 /* 336 * Check if this is a new device announcement (0xAA 0x00) 337 */ 338 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 339 if (psmouse->pktcnt == 1) { 340 psmouse->last = jiffies; 341 goto out; 342 } 343 344 if (psmouse->packet[1] == PSMOUSE_RET_ID || 345 (psmouse->type == PSMOUSE_HGPK && 346 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 347 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 348 serio_reconnect(serio); 349 goto out; 350 } 351 /* 352 * Not a new device, try processing first byte normally 353 */ 354 psmouse->pktcnt = 1; 355 if (psmouse_handle_byte(psmouse)) 356 goto out; 357 358 psmouse->packet[psmouse->pktcnt++] = data; 359 } 360 361 /* 362 * See if we need to force resync because mouse was idle for too long 363 */ 364 if (psmouse->state == PSMOUSE_ACTIVATED && 365 psmouse->pktcnt == 1 && psmouse->resync_time && 366 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 367 psmouse->badbyte = psmouse->packet[0]; 368 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 369 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 370 goto out; 371 } 372 373 psmouse->last = jiffies; 374 psmouse_handle_byte(psmouse); 375 376 out: 377 return IRQ_HANDLED; 378 } 379 380 381 /* 382 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 383 * using sliced syntax, understood by advanced devices, such as Logitech 384 * or Synaptics touchpads. The command is encoded as: 385 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 386 * is the command. 387 */ 388 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 389 { 390 int i; 391 392 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 393 return -1; 394 395 for (i = 6; i >= 0; i -= 2) { 396 unsigned char d = (command >> i) & 3; 397 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 398 return -1; 399 } 400 401 return 0; 402 } 403 404 405 /* 406 * psmouse_reset() resets the mouse into power-on state. 407 */ 408 int psmouse_reset(struct psmouse *psmouse) 409 { 410 unsigned char param[2]; 411 412 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 413 return -1; 414 415 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 416 return -1; 417 418 return 0; 419 } 420 421 422 /* 423 * Genius NetMouse magic init. 424 */ 425 static int genius_detect(struct psmouse *psmouse, bool set_properties) 426 { 427 struct ps2dev *ps2dev = &psmouse->ps2dev; 428 unsigned char param[4]; 429 430 param[0] = 3; 431 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 432 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 433 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 434 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 435 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 436 437 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 438 return -1; 439 440 if (set_properties) { 441 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 442 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 443 __set_bit(BTN_SIDE, psmouse->dev->keybit); 444 __set_bit(REL_WHEEL, psmouse->dev->relbit); 445 446 psmouse->vendor = "Genius"; 447 psmouse->name = "Mouse"; 448 psmouse->pktsize = 4; 449 } 450 451 return 0; 452 } 453 454 /* 455 * IntelliMouse magic init. 456 */ 457 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 458 { 459 struct ps2dev *ps2dev = &psmouse->ps2dev; 460 unsigned char param[2]; 461 462 param[0] = 200; 463 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 464 param[0] = 100; 465 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 466 param[0] = 80; 467 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 468 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 469 470 if (param[0] != 3) 471 return -1; 472 473 if (set_properties) { 474 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 475 __set_bit(REL_WHEEL, psmouse->dev->relbit); 476 477 if (!psmouse->vendor) 478 psmouse->vendor = "Generic"; 479 if (!psmouse->name) 480 psmouse->name = "Wheel Mouse"; 481 psmouse->pktsize = 4; 482 } 483 484 return 0; 485 } 486 487 /* 488 * Try IntelliMouse/Explorer magic init. 489 */ 490 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 491 { 492 struct ps2dev *ps2dev = &psmouse->ps2dev; 493 unsigned char param[2]; 494 495 intellimouse_detect(psmouse, 0); 496 497 param[0] = 200; 498 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 499 param[0] = 200; 500 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 501 param[0] = 80; 502 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 503 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 504 505 if (param[0] != 4) 506 return -1; 507 508 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 509 param[0] = 200; 510 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 511 param[0] = 80; 512 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 513 param[0] = 40; 514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 515 516 if (set_properties) { 517 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 518 __set_bit(REL_WHEEL, psmouse->dev->relbit); 519 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 520 __set_bit(BTN_SIDE, psmouse->dev->keybit); 521 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 522 523 if (!psmouse->vendor) 524 psmouse->vendor = "Generic"; 525 if (!psmouse->name) 526 psmouse->name = "Explorer Mouse"; 527 psmouse->pktsize = 4; 528 } 529 530 return 0; 531 } 532 533 /* 534 * Kensington ThinkingMouse / ExpertMouse magic init. 535 */ 536 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 537 { 538 struct ps2dev *ps2dev = &psmouse->ps2dev; 539 unsigned char param[2]; 540 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 541 int i; 542 543 param[0] = 10; 544 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 545 param[0] = 0; 546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 547 for (i = 0; i < ARRAY_SIZE(seq); i++) { 548 param[0] = seq[i]; 549 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 550 } 551 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 552 553 if (param[0] != 2) 554 return -1; 555 556 if (set_properties) { 557 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 558 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 559 560 psmouse->vendor = "Kensington"; 561 psmouse->name = "ThinkingMouse"; 562 } 563 564 return 0; 565 } 566 567 /* 568 * Bare PS/2 protocol "detection". Always succeeds. 569 */ 570 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 571 { 572 if (set_properties) { 573 if (!psmouse->vendor) 574 psmouse->vendor = "Generic"; 575 if (!psmouse->name) 576 psmouse->name = "Mouse"; 577 578 /* 579 * We have no way of figuring true number of buttons so let's 580 * assume that the device has 3. 581 */ 582 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 583 } 584 585 return 0; 586 } 587 588 /* 589 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 590 * must be forced by sysfs protocol writing. 591 */ 592 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 593 { 594 if (set_properties) { 595 psmouse->vendor = "Cortron"; 596 psmouse->name = "PS/2 Trackball"; 597 598 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 599 __set_bit(BTN_SIDE, psmouse->dev->keybit); 600 } 601 602 return 0; 603 } 604 605 /* 606 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 607 * the mouse may have. 608 */ 609 610 static int psmouse_extensions(struct psmouse *psmouse, 611 unsigned int max_proto, bool set_properties) 612 { 613 bool synaptics_hardware = false; 614 615 /* 616 * We always check for lifebook because it does not disturb mouse 617 * (it only checks DMI information). 618 */ 619 if (lifebook_detect(psmouse, set_properties) == 0) { 620 if (max_proto > PSMOUSE_IMEX) { 621 if (!set_properties || lifebook_init(psmouse) == 0) 622 return PSMOUSE_LIFEBOOK; 623 } 624 } 625 626 /* 627 * Try Kensington ThinkingMouse (we try first, because synaptics probe 628 * upsets the thinkingmouse). 629 */ 630 631 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 632 return PSMOUSE_THINKPS; 633 634 /* 635 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 636 * support is disabled in config - we need to know if it is synaptics so we 637 * can reset it properly after probing for intellimouse. 638 */ 639 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 640 synaptics_hardware = true; 641 642 if (max_proto > PSMOUSE_IMEX) { 643 /* 644 * Try activating protocol, but check if support is enabled first, since 645 * we try detecting Synaptics even when protocol is disabled. 646 */ 647 if (synaptics_supported() && 648 (!set_properties || synaptics_init(psmouse) == 0)) { 649 return PSMOUSE_SYNAPTICS; 650 } 651 652 /* 653 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 654 * Unfortunately Logitech/Genius probes confuse some firmware versions so 655 * we'll have to skip them. 656 */ 657 max_proto = PSMOUSE_IMEX; 658 } 659 /* 660 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 661 */ 662 synaptics_reset(psmouse); 663 } 664 665 /* 666 * Try ALPS TouchPad 667 */ 668 if (max_proto > PSMOUSE_IMEX) { 669 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 670 if (alps_detect(psmouse, set_properties) == 0) { 671 if (!set_properties || alps_init(psmouse) == 0) 672 return PSMOUSE_ALPS; 673 /* 674 * Init failed, try basic relative protocols 675 */ 676 max_proto = PSMOUSE_IMEX; 677 } 678 } 679 680 /* 681 * Try OLPC HGPK touchpad. 682 */ 683 if (max_proto > PSMOUSE_IMEX && 684 hgpk_detect(psmouse, set_properties) == 0) { 685 if (!set_properties || hgpk_init(psmouse) == 0) 686 return PSMOUSE_HGPK; 687 /* 688 * Init failed, try basic relative protocols 689 */ 690 max_proto = PSMOUSE_IMEX; 691 } 692 693 /* 694 * Try Elantech touchpad. 695 */ 696 if (max_proto > PSMOUSE_IMEX && 697 elantech_detect(psmouse, set_properties) == 0) { 698 if (!set_properties || elantech_init(psmouse) == 0) 699 return PSMOUSE_ELANTECH; 700 /* 701 * Init failed, try basic relative protocols 702 */ 703 max_proto = PSMOUSE_IMEX; 704 } 705 706 707 if (max_proto > PSMOUSE_IMEX) { 708 if (genius_detect(psmouse, set_properties) == 0) 709 return PSMOUSE_GENPS; 710 711 if (ps2pp_init(psmouse, set_properties) == 0) 712 return PSMOUSE_PS2PP; 713 714 if (trackpoint_detect(psmouse, set_properties) == 0) 715 return PSMOUSE_TRACKPOINT; 716 717 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 718 return PSMOUSE_TOUCHKIT_PS2; 719 } 720 721 /* 722 * Try Finger Sensing Pad. We do it here because its probe upsets 723 * Trackpoint devices (causing TP_READ_ID command to time out). 724 */ 725 if (max_proto > PSMOUSE_IMEX) { 726 if (fsp_detect(psmouse, set_properties) == 0) { 727 if (!set_properties || fsp_init(psmouse) == 0) 728 return PSMOUSE_FSP; 729 /* 730 * Init failed, try basic relative protocols 731 */ 732 max_proto = PSMOUSE_IMEX; 733 } 734 } 735 736 /* 737 * Reset to defaults in case the device got confused by extended 738 * protocol probes. Note that we follow up with full reset because 739 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 740 */ 741 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 742 psmouse_reset(psmouse); 743 744 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 745 return PSMOUSE_IMEX; 746 747 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 748 return PSMOUSE_IMPS; 749 750 /* 751 * Okay, all failed, we have a standard mouse here. The number of the buttons 752 * is still a question, though. We assume 3. 753 */ 754 ps2bare_detect(psmouse, set_properties); 755 756 if (synaptics_hardware) { 757 /* 758 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 759 * We need to reset the touchpad because if there is a track point on the 760 * pass through port it could get disabled while probing for protocol 761 * extensions. 762 */ 763 psmouse_reset(psmouse); 764 } 765 766 return PSMOUSE_PS2; 767 } 768 769 static const struct psmouse_protocol psmouse_protocols[] = { 770 { 771 .type = PSMOUSE_PS2, 772 .name = "PS/2", 773 .alias = "bare", 774 .maxproto = true, 775 .ignore_parity = true, 776 .detect = ps2bare_detect, 777 }, 778 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 779 { 780 .type = PSMOUSE_PS2PP, 781 .name = "PS2++", 782 .alias = "logitech", 783 .detect = ps2pp_init, 784 }, 785 #endif 786 { 787 .type = PSMOUSE_THINKPS, 788 .name = "ThinkPS/2", 789 .alias = "thinkps", 790 .detect = thinking_detect, 791 }, 792 { 793 .type = PSMOUSE_GENPS, 794 .name = "GenPS/2", 795 .alias = "genius", 796 .detect = genius_detect, 797 }, 798 { 799 .type = PSMOUSE_IMPS, 800 .name = "ImPS/2", 801 .alias = "imps", 802 .maxproto = true, 803 .ignore_parity = true, 804 .detect = intellimouse_detect, 805 }, 806 { 807 .type = PSMOUSE_IMEX, 808 .name = "ImExPS/2", 809 .alias = "exps", 810 .maxproto = true, 811 .ignore_parity = true, 812 .detect = im_explorer_detect, 813 }, 814 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 815 { 816 .type = PSMOUSE_SYNAPTICS, 817 .name = "SynPS/2", 818 .alias = "synaptics", 819 .detect = synaptics_detect, 820 .init = synaptics_init, 821 }, 822 #endif 823 #ifdef CONFIG_MOUSE_PS2_ALPS 824 { 825 .type = PSMOUSE_ALPS, 826 .name = "AlpsPS/2", 827 .alias = "alps", 828 .detect = alps_detect, 829 .init = alps_init, 830 }, 831 #endif 832 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 833 { 834 .type = PSMOUSE_LIFEBOOK, 835 .name = "LBPS/2", 836 .alias = "lifebook", 837 .init = lifebook_init, 838 }, 839 #endif 840 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 841 { 842 .type = PSMOUSE_TRACKPOINT, 843 .name = "TPPS/2", 844 .alias = "trackpoint", 845 .detect = trackpoint_detect, 846 }, 847 #endif 848 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 849 { 850 .type = PSMOUSE_TOUCHKIT_PS2, 851 .name = "touchkitPS/2", 852 .alias = "touchkit", 853 .detect = touchkit_ps2_detect, 854 }, 855 #endif 856 #ifdef CONFIG_MOUSE_PS2_OLPC 857 { 858 .type = PSMOUSE_HGPK, 859 .name = "OLPC HGPK", 860 .alias = "hgpk", 861 .detect = hgpk_detect, 862 }, 863 #endif 864 #ifdef CONFIG_MOUSE_PS2_ELANTECH 865 { 866 .type = PSMOUSE_ELANTECH, 867 .name = "ETPS/2", 868 .alias = "elantech", 869 .detect = elantech_detect, 870 .init = elantech_init, 871 }, 872 #endif 873 #ifdef CONFIG_MOUSE_PS2_SENTELIC 874 { 875 .type = PSMOUSE_FSP, 876 .name = "FSPPS/2", 877 .alias = "fsp", 878 .detect = fsp_detect, 879 .init = fsp_init, 880 }, 881 #endif 882 { 883 .type = PSMOUSE_CORTRON, 884 .name = "CortronPS/2", 885 .alias = "cortps", 886 .detect = cortron_detect, 887 }, 888 { 889 .type = PSMOUSE_AUTO, 890 .name = "auto", 891 .alias = "any", 892 .maxproto = true, 893 }, 894 }; 895 896 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 897 { 898 int i; 899 900 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 901 if (psmouse_protocols[i].type == type) 902 return &psmouse_protocols[i]; 903 904 WARN_ON(1); 905 return &psmouse_protocols[0]; 906 } 907 908 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 909 { 910 const struct psmouse_protocol *p; 911 int i; 912 913 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 914 p = &psmouse_protocols[i]; 915 916 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 917 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 918 return &psmouse_protocols[i]; 919 } 920 921 return NULL; 922 } 923 924 925 /* 926 * psmouse_probe() probes for a PS/2 mouse. 927 */ 928 929 static int psmouse_probe(struct psmouse *psmouse) 930 { 931 struct ps2dev *ps2dev = &psmouse->ps2dev; 932 unsigned char param[2]; 933 934 /* 935 * First, we check if it's a mouse. It should send 0x00 or 0x03 936 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 937 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 938 * ID queries, probably due to a firmware bug. 939 */ 940 941 param[0] = 0xa5; 942 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 943 return -1; 944 945 if (param[0] != 0x00 && param[0] != 0x03 && 946 param[0] != 0x04 && param[0] != 0xff) 947 return -1; 948 949 /* 950 * Then we reset and disable the mouse so that it doesn't generate events. 951 */ 952 953 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 954 psmouse_warn(psmouse, "Failed to reset mouse on %s\n", 955 ps2dev->serio->phys); 956 957 return 0; 958 } 959 960 /* 961 * Here we set the mouse resolution. 962 */ 963 964 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 965 { 966 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 967 unsigned char p; 968 969 if (resolution == 0 || resolution > 200) 970 resolution = 200; 971 972 p = params[resolution / 50]; 973 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 974 psmouse->resolution = 25 << p; 975 } 976 977 /* 978 * Here we set the mouse report rate. 979 */ 980 981 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 982 { 983 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 984 unsigned char r; 985 int i = 0; 986 987 while (rates[i] > rate) i++; 988 r = rates[i]; 989 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 990 psmouse->rate = r; 991 } 992 993 /* 994 * psmouse_initialize() initializes the mouse to a sane state. 995 */ 996 997 static void psmouse_initialize(struct psmouse *psmouse) 998 { 999 /* 1000 * We set the mouse report rate, resolution and scaling. 1001 */ 1002 1003 if (psmouse_max_proto != PSMOUSE_PS2) { 1004 psmouse->set_rate(psmouse, psmouse->rate); 1005 psmouse->set_resolution(psmouse, psmouse->resolution); 1006 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 1007 } 1008 } 1009 1010 /* 1011 * psmouse_activate() enables the mouse so that we get motion reports from it. 1012 */ 1013 1014 static void psmouse_activate(struct psmouse *psmouse) 1015 { 1016 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1017 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1018 psmouse->ps2dev.serio->phys); 1019 1020 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1021 } 1022 1023 1024 /* 1025 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 1026 * reports from it unless we explicitly request it. 1027 */ 1028 1029 static void psmouse_deactivate(struct psmouse *psmouse) 1030 { 1031 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1032 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n", 1033 psmouse->ps2dev.serio->phys); 1034 1035 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1036 } 1037 1038 /* 1039 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it. 1040 */ 1041 1042 static int psmouse_poll(struct psmouse *psmouse) 1043 { 1044 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1045 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1046 } 1047 1048 1049 /* 1050 * psmouse_resync() attempts to re-validate current protocol. 1051 */ 1052 1053 static void psmouse_resync(struct work_struct *work) 1054 { 1055 struct psmouse *parent = NULL, *psmouse = 1056 container_of(work, struct psmouse, resync_work.work); 1057 struct serio *serio = psmouse->ps2dev.serio; 1058 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1059 bool failed = false, enabled = false; 1060 int i; 1061 1062 mutex_lock(&psmouse_mutex); 1063 1064 if (psmouse->state != PSMOUSE_RESYNCING) 1065 goto out; 1066 1067 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1068 parent = serio_get_drvdata(serio->parent); 1069 psmouse_deactivate(parent); 1070 } 1071 1072 /* 1073 * Some mice don't ACK commands sent while they are in the middle of 1074 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1075 * instead of ps2_command() which would wait for 200ms for an ACK 1076 * that may never come. 1077 * As an additional quirk ALPS touchpads may not only forget to ACK 1078 * disable command but will stop reporting taps, so if we see that 1079 * mouse at least once ACKs disable we will do full reconnect if ACK 1080 * is missing. 1081 */ 1082 psmouse->num_resyncs++; 1083 1084 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1085 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1086 failed = true; 1087 } else 1088 psmouse->acks_disable_command = true; 1089 1090 /* 1091 * Poll the mouse. If it was reset the packet will be shorter than 1092 * psmouse->pktsize and ps2_command will fail. We do not expect and 1093 * do not handle scenario when mouse "upgrades" its protocol while 1094 * disconnected since it would require additional delay. If we ever 1095 * see a mouse that does it we'll adjust the code. 1096 */ 1097 if (!failed) { 1098 if (psmouse->poll(psmouse)) 1099 failed = true; 1100 else { 1101 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1102 for (i = 0; i < psmouse->pktsize; i++) { 1103 psmouse->pktcnt++; 1104 rc = psmouse->protocol_handler(psmouse); 1105 if (rc != PSMOUSE_GOOD_DATA) 1106 break; 1107 } 1108 if (rc != PSMOUSE_FULL_PACKET) 1109 failed = true; 1110 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1111 } 1112 } 1113 /* 1114 * Now try to enable mouse. We try to do that even if poll failed and also 1115 * repeat our attempts 5 times, otherwise we may be left out with disabled 1116 * mouse. 1117 */ 1118 for (i = 0; i < 5; i++) { 1119 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1120 enabled = true; 1121 break; 1122 } 1123 msleep(200); 1124 } 1125 1126 if (!enabled) { 1127 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1128 psmouse->ps2dev.serio->phys); 1129 failed = true; 1130 } 1131 1132 if (failed) { 1133 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1134 psmouse_info(psmouse, 1135 "resync failed, issuing reconnect request\n"); 1136 serio_reconnect(serio); 1137 } else 1138 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1139 1140 if (parent) 1141 psmouse_activate(parent); 1142 out: 1143 mutex_unlock(&psmouse_mutex); 1144 } 1145 1146 /* 1147 * psmouse_cleanup() resets the mouse into power-on state. 1148 */ 1149 1150 static void psmouse_cleanup(struct serio *serio) 1151 { 1152 struct psmouse *psmouse = serio_get_drvdata(serio); 1153 struct psmouse *parent = NULL; 1154 1155 mutex_lock(&psmouse_mutex); 1156 1157 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1158 parent = serio_get_drvdata(serio->parent); 1159 psmouse_deactivate(parent); 1160 } 1161 1162 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1163 1164 /* 1165 * Disable stream mode so cleanup routine can proceed undisturbed. 1166 */ 1167 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1168 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1169 psmouse->ps2dev.serio->phys); 1170 1171 if (psmouse->cleanup) 1172 psmouse->cleanup(psmouse); 1173 1174 /* 1175 * Reset the mouse to defaults (bare PS/2 protocol). 1176 */ 1177 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1178 1179 /* 1180 * Some boxes, such as HP nx7400, get terribly confused if mouse 1181 * is not fully enabled before suspending/shutting down. 1182 */ 1183 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1184 1185 if (parent) { 1186 if (parent->pt_deactivate) 1187 parent->pt_deactivate(parent); 1188 1189 psmouse_activate(parent); 1190 } 1191 1192 mutex_unlock(&psmouse_mutex); 1193 } 1194 1195 /* 1196 * psmouse_disconnect() closes and frees. 1197 */ 1198 1199 static void psmouse_disconnect(struct serio *serio) 1200 { 1201 struct psmouse *psmouse, *parent = NULL; 1202 1203 psmouse = serio_get_drvdata(serio); 1204 1205 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1206 1207 mutex_lock(&psmouse_mutex); 1208 1209 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1210 1211 /* make sure we don't have a resync in progress */ 1212 mutex_unlock(&psmouse_mutex); 1213 flush_workqueue(kpsmoused_wq); 1214 mutex_lock(&psmouse_mutex); 1215 1216 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1217 parent = serio_get_drvdata(serio->parent); 1218 psmouse_deactivate(parent); 1219 } 1220 1221 if (psmouse->disconnect) 1222 psmouse->disconnect(psmouse); 1223 1224 if (parent && parent->pt_deactivate) 1225 parent->pt_deactivate(parent); 1226 1227 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1228 1229 serio_close(serio); 1230 serio_set_drvdata(serio, NULL); 1231 input_unregister_device(psmouse->dev); 1232 kfree(psmouse); 1233 1234 if (parent) 1235 psmouse_activate(parent); 1236 1237 mutex_unlock(&psmouse_mutex); 1238 } 1239 1240 static int psmouse_switch_protocol(struct psmouse *psmouse, 1241 const struct psmouse_protocol *proto) 1242 { 1243 const struct psmouse_protocol *selected_proto; 1244 struct input_dev *input_dev = psmouse->dev; 1245 1246 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1247 1248 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1249 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = 1250 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 1251 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1252 1253 psmouse->set_rate = psmouse_set_rate; 1254 psmouse->set_resolution = psmouse_set_resolution; 1255 psmouse->poll = psmouse_poll; 1256 psmouse->protocol_handler = psmouse_process_byte; 1257 psmouse->pktsize = 3; 1258 1259 if (proto && (proto->detect || proto->init)) { 1260 if (proto->detect && proto->detect(psmouse, true) < 0) 1261 return -1; 1262 1263 if (proto->init && proto->init(psmouse) < 0) 1264 return -1; 1265 1266 psmouse->type = proto->type; 1267 selected_proto = proto; 1268 } else { 1269 psmouse->type = psmouse_extensions(psmouse, 1270 psmouse_max_proto, true); 1271 selected_proto = psmouse_protocol_by_type(psmouse->type); 1272 } 1273 1274 psmouse->ignore_parity = selected_proto->ignore_parity; 1275 1276 /* 1277 * If mouse's packet size is 3 there is no point in polling the 1278 * device in hopes to detect protocol reset - we won't get less 1279 * than 3 bytes response anyhow. 1280 */ 1281 if (psmouse->pktsize == 3) 1282 psmouse->resync_time = 0; 1283 1284 /* 1285 * Some smart KVMs fake response to POLL command returning just 1286 * 3 bytes and messing up our resync logic, so if initial poll 1287 * fails we won't try polling the device anymore. Hopefully 1288 * such KVM will maintain initially selected protocol. 1289 */ 1290 if (psmouse->resync_time && psmouse->poll(psmouse)) 1291 psmouse->resync_time = 0; 1292 1293 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1294 selected_proto->name, psmouse->vendor, psmouse->name); 1295 1296 input_dev->name = psmouse->devname; 1297 input_dev->phys = psmouse->phys; 1298 input_dev->id.bustype = BUS_I8042; 1299 input_dev->id.vendor = 0x0002; 1300 input_dev->id.product = psmouse->type; 1301 input_dev->id.version = psmouse->model; 1302 1303 return 0; 1304 } 1305 1306 /* 1307 * psmouse_connect() is a callback from the serio module when 1308 * an unhandled serio port is found. 1309 */ 1310 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1311 { 1312 struct psmouse *psmouse, *parent = NULL; 1313 struct input_dev *input_dev; 1314 int retval = 0, error = -ENOMEM; 1315 1316 mutex_lock(&psmouse_mutex); 1317 1318 /* 1319 * If this is a pass-through port deactivate parent so the device 1320 * connected to this port can be successfully identified 1321 */ 1322 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1323 parent = serio_get_drvdata(serio->parent); 1324 psmouse_deactivate(parent); 1325 } 1326 1327 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1328 input_dev = input_allocate_device(); 1329 if (!psmouse || !input_dev) 1330 goto err_free; 1331 1332 ps2_init(&psmouse->ps2dev, serio); 1333 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1334 psmouse->dev = input_dev; 1335 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1336 1337 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1338 1339 serio_set_drvdata(serio, psmouse); 1340 1341 error = serio_open(serio, drv); 1342 if (error) 1343 goto err_clear_drvdata; 1344 1345 if (psmouse_probe(psmouse) < 0) { 1346 error = -ENODEV; 1347 goto err_close_serio; 1348 } 1349 1350 psmouse->rate = psmouse_rate; 1351 psmouse->resolution = psmouse_resolution; 1352 psmouse->resetafter = psmouse_resetafter; 1353 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1354 psmouse->smartscroll = psmouse_smartscroll; 1355 1356 psmouse_switch_protocol(psmouse, NULL); 1357 1358 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1359 psmouse_initialize(psmouse); 1360 1361 error = input_register_device(psmouse->dev); 1362 if (error) 1363 goto err_protocol_disconnect; 1364 1365 if (parent && parent->pt_activate) 1366 parent->pt_activate(parent); 1367 1368 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1369 if (error) 1370 goto err_pt_deactivate; 1371 1372 psmouse_activate(psmouse); 1373 1374 out: 1375 /* If this is a pass-through port the parent needs to be re-activated */ 1376 if (parent) 1377 psmouse_activate(parent); 1378 1379 mutex_unlock(&psmouse_mutex); 1380 return retval; 1381 1382 err_pt_deactivate: 1383 if (parent && parent->pt_deactivate) 1384 parent->pt_deactivate(parent); 1385 input_unregister_device(psmouse->dev); 1386 input_dev = NULL; /* so we don't try to free it below */ 1387 err_protocol_disconnect: 1388 if (psmouse->disconnect) 1389 psmouse->disconnect(psmouse); 1390 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1391 err_close_serio: 1392 serio_close(serio); 1393 err_clear_drvdata: 1394 serio_set_drvdata(serio, NULL); 1395 err_free: 1396 input_free_device(input_dev); 1397 kfree(psmouse); 1398 1399 retval = error; 1400 goto out; 1401 } 1402 1403 1404 static int psmouse_reconnect(struct serio *serio) 1405 { 1406 struct psmouse *psmouse = serio_get_drvdata(serio); 1407 struct psmouse *parent = NULL; 1408 struct serio_driver *drv = serio->drv; 1409 unsigned char type; 1410 int rc = -1; 1411 1412 if (!drv || !psmouse) { 1413 psmouse_dbg(psmouse, 1414 "reconnect request, but serio is disconnected, ignoring...\n"); 1415 return -1; 1416 } 1417 1418 mutex_lock(&psmouse_mutex); 1419 1420 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1421 parent = serio_get_drvdata(serio->parent); 1422 psmouse_deactivate(parent); 1423 } 1424 1425 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1426 1427 if (psmouse->reconnect) { 1428 if (psmouse->reconnect(psmouse)) 1429 goto out; 1430 } else { 1431 psmouse_reset(psmouse); 1432 1433 if (psmouse_probe(psmouse) < 0) 1434 goto out; 1435 1436 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1437 if (psmouse->type != type) 1438 goto out; 1439 } 1440 1441 /* 1442 * OK, the device type (and capabilities) match the old one, 1443 * we can continue using it, complete initialization 1444 */ 1445 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1446 1447 psmouse_initialize(psmouse); 1448 1449 if (parent && parent->pt_activate) 1450 parent->pt_activate(parent); 1451 1452 psmouse_activate(psmouse); 1453 rc = 0; 1454 1455 out: 1456 /* If this is a pass-through port the parent waits to be activated */ 1457 if (parent) 1458 psmouse_activate(parent); 1459 1460 mutex_unlock(&psmouse_mutex); 1461 return rc; 1462 } 1463 1464 static struct serio_device_id psmouse_serio_ids[] = { 1465 { 1466 .type = SERIO_8042, 1467 .proto = SERIO_ANY, 1468 .id = SERIO_ANY, 1469 .extra = SERIO_ANY, 1470 }, 1471 { 1472 .type = SERIO_PS_PSTHRU, 1473 .proto = SERIO_ANY, 1474 .id = SERIO_ANY, 1475 .extra = SERIO_ANY, 1476 }, 1477 { 0 } 1478 }; 1479 1480 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1481 1482 static struct serio_driver psmouse_drv = { 1483 .driver = { 1484 .name = "psmouse", 1485 }, 1486 .description = DRIVER_DESC, 1487 .id_table = psmouse_serio_ids, 1488 .interrupt = psmouse_interrupt, 1489 .connect = psmouse_connect, 1490 .reconnect = psmouse_reconnect, 1491 .disconnect = psmouse_disconnect, 1492 .cleanup = psmouse_cleanup, 1493 }; 1494 1495 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1496 char *buf) 1497 { 1498 struct serio *serio = to_serio_port(dev); 1499 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1500 struct psmouse *psmouse; 1501 1502 psmouse = serio_get_drvdata(serio); 1503 1504 return attr->show(psmouse, attr->data, buf); 1505 } 1506 1507 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1508 const char *buf, size_t count) 1509 { 1510 struct serio *serio = to_serio_port(dev); 1511 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1512 struct psmouse *psmouse, *parent = NULL; 1513 int retval; 1514 1515 retval = mutex_lock_interruptible(&psmouse_mutex); 1516 if (retval) 1517 goto out; 1518 1519 psmouse = serio_get_drvdata(serio); 1520 1521 if (attr->protect) { 1522 if (psmouse->state == PSMOUSE_IGNORE) { 1523 retval = -ENODEV; 1524 goto out_unlock; 1525 } 1526 1527 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1528 parent = serio_get_drvdata(serio->parent); 1529 psmouse_deactivate(parent); 1530 } 1531 1532 psmouse_deactivate(psmouse); 1533 } 1534 1535 retval = attr->set(psmouse, attr->data, buf, count); 1536 1537 if (attr->protect) { 1538 if (retval != -ENODEV) 1539 psmouse_activate(psmouse); 1540 1541 if (parent) 1542 psmouse_activate(parent); 1543 } 1544 1545 out_unlock: 1546 mutex_unlock(&psmouse_mutex); 1547 out: 1548 return retval; 1549 } 1550 1551 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1552 { 1553 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1554 1555 return sprintf(buf, "%u\n", *field); 1556 } 1557 1558 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1559 { 1560 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1561 unsigned long value; 1562 1563 if (strict_strtoul(buf, 10, &value)) 1564 return -EINVAL; 1565 1566 if ((unsigned int)value != value) 1567 return -EINVAL; 1568 1569 *field = value; 1570 1571 return count; 1572 } 1573 1574 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1575 { 1576 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1577 } 1578 1579 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1580 { 1581 struct serio *serio = psmouse->ps2dev.serio; 1582 struct psmouse *parent = NULL; 1583 struct input_dev *old_dev, *new_dev; 1584 const struct psmouse_protocol *proto, *old_proto; 1585 int error; 1586 int retry = 0; 1587 1588 proto = psmouse_protocol_by_name(buf, count); 1589 if (!proto) 1590 return -EINVAL; 1591 1592 if (psmouse->type == proto->type) 1593 return count; 1594 1595 new_dev = input_allocate_device(); 1596 if (!new_dev) 1597 return -ENOMEM; 1598 1599 while (!list_empty(&serio->children)) { 1600 if (++retry > 3) { 1601 psmouse_warn(psmouse, 1602 "failed to destroy children ports, protocol change aborted.\n"); 1603 input_free_device(new_dev); 1604 return -EIO; 1605 } 1606 1607 mutex_unlock(&psmouse_mutex); 1608 serio_unregister_child_port(serio); 1609 mutex_lock(&psmouse_mutex); 1610 1611 if (serio->drv != &psmouse_drv) { 1612 input_free_device(new_dev); 1613 return -ENODEV; 1614 } 1615 1616 if (psmouse->type == proto->type) { 1617 input_free_device(new_dev); 1618 return count; /* switched by other thread */ 1619 } 1620 } 1621 1622 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1623 parent = serio_get_drvdata(serio->parent); 1624 if (parent->pt_deactivate) 1625 parent->pt_deactivate(parent); 1626 } 1627 1628 old_dev = psmouse->dev; 1629 old_proto = psmouse_protocol_by_type(psmouse->type); 1630 1631 if (psmouse->disconnect) 1632 psmouse->disconnect(psmouse); 1633 1634 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1635 1636 psmouse->dev = new_dev; 1637 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1638 1639 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1640 psmouse_reset(psmouse); 1641 /* default to PSMOUSE_PS2 */ 1642 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1643 } 1644 1645 psmouse_initialize(psmouse); 1646 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1647 1648 error = input_register_device(psmouse->dev); 1649 if (error) { 1650 if (psmouse->disconnect) 1651 psmouse->disconnect(psmouse); 1652 1653 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1654 input_free_device(new_dev); 1655 psmouse->dev = old_dev; 1656 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1657 psmouse_switch_protocol(psmouse, old_proto); 1658 psmouse_initialize(psmouse); 1659 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1660 1661 return error; 1662 } 1663 1664 input_unregister_device(old_dev); 1665 1666 if (parent && parent->pt_activate) 1667 parent->pt_activate(parent); 1668 1669 return count; 1670 } 1671 1672 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1673 { 1674 unsigned long value; 1675 1676 if (strict_strtoul(buf, 10, &value)) 1677 return -EINVAL; 1678 1679 psmouse->set_rate(psmouse, value); 1680 return count; 1681 } 1682 1683 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1684 { 1685 unsigned long value; 1686 1687 if (strict_strtoul(buf, 10, &value)) 1688 return -EINVAL; 1689 1690 psmouse->set_resolution(psmouse, value); 1691 return count; 1692 } 1693 1694 1695 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 1696 { 1697 const struct psmouse_protocol *proto; 1698 1699 if (!val) 1700 return -EINVAL; 1701 1702 proto = psmouse_protocol_by_name(val, strlen(val)); 1703 1704 if (!proto || !proto->maxproto) 1705 return -EINVAL; 1706 1707 *((unsigned int *)kp->arg) = proto->type; 1708 1709 return 0; 1710 } 1711 1712 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 1713 { 1714 int type = *((unsigned int *)kp->arg); 1715 1716 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1717 } 1718 1719 static int __init psmouse_init(void) 1720 { 1721 int err; 1722 1723 lifebook_module_init(); 1724 synaptics_module_init(); 1725 hgpk_module_init(); 1726 1727 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1728 if (!kpsmoused_wq) { 1729 pr_err("failed to create kpsmoused workqueue\n"); 1730 return -ENOMEM; 1731 } 1732 1733 err = serio_register_driver(&psmouse_drv); 1734 if (err) 1735 destroy_workqueue(kpsmoused_wq); 1736 1737 return err; 1738 } 1739 1740 static void __exit psmouse_exit(void) 1741 { 1742 serio_unregister_driver(&psmouse_drv); 1743 destroy_workqueue(kpsmoused_wq); 1744 } 1745 1746 module_init(psmouse_init); 1747 module_exit(psmouse_exit); 1748