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 #include <linux/delay.h> 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/interrupt.h> 18 #include <linux/input.h> 19 #include <linux/serio.h> 20 #include <linux/init.h> 21 #include <linux/libps2.h> 22 #include <linux/mutex.h> 23 24 #include "psmouse.h" 25 #include "synaptics.h" 26 #include "logips2pp.h" 27 #include "alps.h" 28 #include "hgpk.h" 29 #include "lifebook.h" 30 #include "trackpoint.h" 31 #include "touchkit_ps2.h" 32 #include "elantech.h" 33 #include "sentelic.h" 34 35 #define DRIVER_DESC "PS/2 mouse driver" 36 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 38 MODULE_DESCRIPTION(DRIVER_DESC); 39 MODULE_LICENSE("GPL"); 40 41 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 42 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 43 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 44 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 45 #define param_set_proto_abbrev psmouse_set_maxproto 46 #define param_get_proto_abbrev psmouse_get_maxproto 47 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 48 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 49 50 static unsigned int psmouse_resolution = 200; 51 module_param_named(resolution, psmouse_resolution, uint, 0644); 52 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 53 54 static unsigned int psmouse_rate = 100; 55 module_param_named(rate, psmouse_rate, uint, 0644); 56 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 57 58 static unsigned int psmouse_smartscroll = 1; 59 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 60 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 61 62 static unsigned int psmouse_resetafter = 5; 63 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 64 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 65 66 static unsigned int psmouse_resync_time; 67 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 68 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 69 70 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 71 NULL, 72 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 73 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 74 (void *) offsetof(struct psmouse, rate), 75 psmouse_show_int_attr, psmouse_attr_set_rate); 76 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 77 (void *) offsetof(struct psmouse, resolution), 78 psmouse_show_int_attr, psmouse_attr_set_resolution); 79 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 80 (void *) offsetof(struct psmouse, resetafter), 81 psmouse_show_int_attr, psmouse_set_int_attr); 82 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 83 (void *) offsetof(struct psmouse, resync_time), 84 psmouse_show_int_attr, psmouse_set_int_attr); 85 86 static struct attribute *psmouse_attributes[] = { 87 &psmouse_attr_protocol.dattr.attr, 88 &psmouse_attr_rate.dattr.attr, 89 &psmouse_attr_resolution.dattr.attr, 90 &psmouse_attr_resetafter.dattr.attr, 91 &psmouse_attr_resync_time.dattr.attr, 92 NULL 93 }; 94 95 static struct attribute_group psmouse_attribute_group = { 96 .attrs = psmouse_attributes, 97 }; 98 99 /* 100 * psmouse_mutex protects all operations changing state of mouse 101 * (connecting, disconnecting, changing rate or resolution via 102 * sysfs). We could use a per-device semaphore but since there 103 * rarely more than one PS/2 mouse connected and since semaphore 104 * is taken in "slow" paths it is not worth it. 105 */ 106 static DEFINE_MUTEX(psmouse_mutex); 107 108 static struct workqueue_struct *kpsmoused_wq; 109 110 struct psmouse_protocol { 111 enum psmouse_type type; 112 bool maxproto; 113 const char *name; 114 const char *alias; 115 int (*detect)(struct psmouse *, bool); 116 int (*init)(struct psmouse *); 117 }; 118 119 /* 120 * psmouse_process_byte() analyzes the PS/2 data stream and reports 121 * relevant events to the input module once full packet has arrived. 122 */ 123 124 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 125 { 126 struct input_dev *dev = psmouse->dev; 127 unsigned char *packet = psmouse->packet; 128 129 if (psmouse->pktcnt < psmouse->pktsize) 130 return PSMOUSE_GOOD_DATA; 131 132 /* 133 * Full packet accumulated, process it 134 */ 135 136 /* 137 * Scroll wheel on IntelliMice, scroll buttons on NetMice 138 */ 139 140 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 141 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 142 143 /* 144 * Scroll wheel and buttons on IntelliMouse Explorer 145 */ 146 147 if (psmouse->type == PSMOUSE_IMEX) { 148 switch (packet[3] & 0xC0) { 149 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 150 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 151 break; 152 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 153 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 154 break; 155 case 0x00: 156 case 0xC0: 157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 158 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 159 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 160 break; 161 } 162 } 163 164 /* 165 * Extra buttons on Genius NewNet 3D 166 */ 167 168 if (psmouse->type == PSMOUSE_GENPS) { 169 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 170 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 171 } 172 173 /* 174 * Extra button on ThinkingMouse 175 */ 176 if (psmouse->type == PSMOUSE_THINKPS) { 177 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 178 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 179 packet[1] |= (packet[0] & 0x40) << 1; 180 } 181 182 /* 183 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 184 * byte. 185 */ 186 if (psmouse->type == PSMOUSE_CORTRON) { 187 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 188 packet[0] |= 0x08; 189 } 190 191 /* 192 * Generic PS/2 Mouse 193 */ 194 195 input_report_key(dev, BTN_LEFT, packet[0] & 1); 196 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 197 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 198 199 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 200 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 201 202 input_sync(dev); 203 204 return PSMOUSE_FULL_PACKET; 205 } 206 207 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 208 unsigned long delay) 209 { 210 queue_delayed_work(kpsmoused_wq, work, delay); 211 } 212 213 /* 214 * __psmouse_set_state() sets new psmouse state and resets all flags. 215 */ 216 217 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 218 { 219 psmouse->state = new_state; 220 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 221 psmouse->ps2dev.flags = 0; 222 psmouse->last = jiffies; 223 } 224 225 226 /* 227 * psmouse_set_state() sets new psmouse state and resets all flags and 228 * counters while holding serio lock so fighting with interrupt handler 229 * is not a concern. 230 */ 231 232 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 233 { 234 serio_pause_rx(psmouse->ps2dev.serio); 235 __psmouse_set_state(psmouse, new_state); 236 serio_continue_rx(psmouse->ps2dev.serio); 237 } 238 239 /* 240 * psmouse_handle_byte() processes one byte of the input data stream 241 * by calling corresponding protocol handler. 242 */ 243 244 static int psmouse_handle_byte(struct psmouse *psmouse) 245 { 246 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 247 248 switch (rc) { 249 case PSMOUSE_BAD_DATA: 250 if (psmouse->state == PSMOUSE_ACTIVATED) { 251 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 252 psmouse->name, psmouse->phys, psmouse->pktcnt); 253 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 254 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 255 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 256 serio_reconnect(psmouse->ps2dev.serio); 257 return -1; 258 } 259 } 260 psmouse->pktcnt = 0; 261 break; 262 263 case PSMOUSE_FULL_PACKET: 264 psmouse->pktcnt = 0; 265 if (psmouse->out_of_sync_cnt) { 266 psmouse->out_of_sync_cnt = 0; 267 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 268 psmouse->name, psmouse->phys); 269 } 270 break; 271 272 case PSMOUSE_GOOD_DATA: 273 break; 274 } 275 return 0; 276 } 277 278 /* 279 * psmouse_interrupt() handles incoming characters, either passing them 280 * for normal processing or gathering them as command response. 281 */ 282 283 static irqreturn_t psmouse_interrupt(struct serio *serio, 284 unsigned char data, unsigned int flags) 285 { 286 struct psmouse *psmouse = serio_get_drvdata(serio); 287 288 if (psmouse->state == PSMOUSE_IGNORE) 289 goto out; 290 291 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 292 if (psmouse->state == PSMOUSE_ACTIVATED) 293 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 294 flags & SERIO_TIMEOUT ? " timeout" : "", 295 flags & SERIO_PARITY ? " bad parity" : ""); 296 ps2_cmd_aborted(&psmouse->ps2dev); 297 goto out; 298 } 299 300 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 301 if (ps2_handle_ack(&psmouse->ps2dev, data)) 302 goto out; 303 304 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 305 if (ps2_handle_response(&psmouse->ps2dev, data)) 306 goto out; 307 308 if (psmouse->state <= PSMOUSE_RESYNCING) 309 goto out; 310 311 if (psmouse->state == PSMOUSE_ACTIVATED && 312 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 313 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 314 psmouse->name, psmouse->phys, psmouse->pktcnt); 315 psmouse->badbyte = psmouse->packet[0]; 316 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 317 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 318 goto out; 319 } 320 321 psmouse->packet[psmouse->pktcnt++] = data; 322 /* 323 * Check if this is a new device announcement (0xAA 0x00) 324 */ 325 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 326 if (psmouse->pktcnt == 1) { 327 psmouse->last = jiffies; 328 goto out; 329 } 330 331 if (psmouse->packet[1] == PSMOUSE_RET_ID || 332 (psmouse->type == PSMOUSE_HGPK && 333 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 334 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 335 serio_reconnect(serio); 336 goto out; 337 } 338 /* 339 * Not a new device, try processing first byte normally 340 */ 341 psmouse->pktcnt = 1; 342 if (psmouse_handle_byte(psmouse)) 343 goto out; 344 345 psmouse->packet[psmouse->pktcnt++] = data; 346 } 347 348 /* 349 * See if we need to force resync because mouse was idle for too long 350 */ 351 if (psmouse->state == PSMOUSE_ACTIVATED && 352 psmouse->pktcnt == 1 && psmouse->resync_time && 353 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 354 psmouse->badbyte = psmouse->packet[0]; 355 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 356 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 357 goto out; 358 } 359 360 psmouse->last = jiffies; 361 psmouse_handle_byte(psmouse); 362 363 out: 364 return IRQ_HANDLED; 365 } 366 367 368 /* 369 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 370 * using sliced syntax, understood by advanced devices, such as Logitech 371 * or Synaptics touchpads. The command is encoded as: 372 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 373 * is the command. 374 */ 375 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 376 { 377 int i; 378 379 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 380 return -1; 381 382 for (i = 6; i >= 0; i -= 2) { 383 unsigned char d = (command >> i) & 3; 384 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 385 return -1; 386 } 387 388 return 0; 389 } 390 391 392 /* 393 * psmouse_reset() resets the mouse into power-on state. 394 */ 395 int psmouse_reset(struct psmouse *psmouse) 396 { 397 unsigned char param[2]; 398 399 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 400 return -1; 401 402 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 403 return -1; 404 405 return 0; 406 } 407 408 409 /* 410 * Genius NetMouse magic init. 411 */ 412 static int genius_detect(struct psmouse *psmouse, bool set_properties) 413 { 414 struct ps2dev *ps2dev = &psmouse->ps2dev; 415 unsigned char param[4]; 416 417 param[0] = 3; 418 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 419 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 420 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 421 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 422 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 423 424 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 425 return -1; 426 427 if (set_properties) { 428 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 429 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 430 __set_bit(BTN_SIDE, psmouse->dev->keybit); 431 __set_bit(REL_WHEEL, psmouse->dev->relbit); 432 433 psmouse->vendor = "Genius"; 434 psmouse->name = "Mouse"; 435 psmouse->pktsize = 4; 436 } 437 438 return 0; 439 } 440 441 /* 442 * IntelliMouse magic init. 443 */ 444 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 445 { 446 struct ps2dev *ps2dev = &psmouse->ps2dev; 447 unsigned char param[2]; 448 449 param[0] = 200; 450 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 451 param[0] = 100; 452 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 453 param[0] = 80; 454 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 455 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 456 457 if (param[0] != 3) 458 return -1; 459 460 if (set_properties) { 461 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 462 __set_bit(REL_WHEEL, psmouse->dev->relbit); 463 464 if (!psmouse->vendor) 465 psmouse->vendor = "Generic"; 466 if (!psmouse->name) 467 psmouse->name = "Wheel Mouse"; 468 psmouse->pktsize = 4; 469 } 470 471 return 0; 472 } 473 474 /* 475 * Try IntelliMouse/Explorer magic init. 476 */ 477 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 478 { 479 struct ps2dev *ps2dev = &psmouse->ps2dev; 480 unsigned char param[2]; 481 482 intellimouse_detect(psmouse, 0); 483 484 param[0] = 200; 485 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 486 param[0] = 200; 487 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 488 param[0] = 80; 489 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 490 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 491 492 if (param[0] != 4) 493 return -1; 494 495 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 496 param[0] = 200; 497 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 498 param[0] = 80; 499 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 500 param[0] = 40; 501 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 502 503 if (set_properties) { 504 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 505 __set_bit(REL_WHEEL, psmouse->dev->relbit); 506 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 507 __set_bit(BTN_SIDE, psmouse->dev->keybit); 508 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 509 510 if (!psmouse->vendor) 511 psmouse->vendor = "Generic"; 512 if (!psmouse->name) 513 psmouse->name = "Explorer Mouse"; 514 psmouse->pktsize = 4; 515 } 516 517 return 0; 518 } 519 520 /* 521 * Kensington ThinkingMouse / ExpertMouse magic init. 522 */ 523 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 524 { 525 struct ps2dev *ps2dev = &psmouse->ps2dev; 526 unsigned char param[2]; 527 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 528 int i; 529 530 param[0] = 10; 531 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 532 param[0] = 0; 533 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 534 for (i = 0; i < ARRAY_SIZE(seq); i++) { 535 param[0] = seq[i]; 536 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 537 } 538 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 539 540 if (param[0] != 2) 541 return -1; 542 543 if (set_properties) { 544 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 545 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 546 547 psmouse->vendor = "Kensington"; 548 psmouse->name = "ThinkingMouse"; 549 } 550 551 return 0; 552 } 553 554 /* 555 * Bare PS/2 protocol "detection". Always succeeds. 556 */ 557 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 558 { 559 if (set_properties) { 560 if (!psmouse->vendor) 561 psmouse->vendor = "Generic"; 562 if (!psmouse->name) 563 psmouse->name = "Mouse"; 564 565 /* 566 * We have no way of figuring true number of buttons so let's 567 * assume that the device has 3. 568 */ 569 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 570 } 571 572 return 0; 573 } 574 575 /* 576 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 577 * must be forced by sysfs protocol writing. 578 */ 579 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 580 { 581 if (set_properties) { 582 psmouse->vendor = "Cortron"; 583 psmouse->name = "PS/2 Trackball"; 584 585 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 586 __set_bit(BTN_SIDE, psmouse->dev->keybit); 587 } 588 589 return 0; 590 } 591 592 /* 593 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 594 * the mouse may have. 595 */ 596 597 static int psmouse_extensions(struct psmouse *psmouse, 598 unsigned int max_proto, bool set_properties) 599 { 600 bool synaptics_hardware = false; 601 602 /* 603 * We always check for lifebook because it does not disturb mouse 604 * (it only checks DMI information). 605 */ 606 if (lifebook_detect(psmouse, set_properties) == 0) { 607 if (max_proto > PSMOUSE_IMEX) { 608 if (!set_properties || lifebook_init(psmouse) == 0) 609 return PSMOUSE_LIFEBOOK; 610 } 611 } 612 613 /* 614 * Try Kensington ThinkingMouse (we try first, because synaptics probe 615 * upsets the thinkingmouse). 616 */ 617 618 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 619 return PSMOUSE_THINKPS; 620 621 /* 622 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 623 * support is disabled in config - we need to know if it is synaptics so we 624 * can reset it properly after probing for intellimouse. 625 */ 626 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 627 synaptics_hardware = true; 628 629 if (max_proto > PSMOUSE_IMEX) { 630 /* 631 * Try activating protocol, but check if support is enabled first, since 632 * we try detecting Synaptics even when protocol is disabled. 633 */ 634 if (synaptics_supported() && 635 (!set_properties || synaptics_init(psmouse) == 0)) { 636 return PSMOUSE_SYNAPTICS; 637 } 638 639 /* 640 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 641 * Unfortunately Logitech/Genius probes confuse some firmware versions so 642 * we'll have to skip them. 643 */ 644 max_proto = PSMOUSE_IMEX; 645 } 646 /* 647 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 648 */ 649 synaptics_reset(psmouse); 650 } 651 652 /* 653 * Try ALPS TouchPad 654 */ 655 if (max_proto > PSMOUSE_IMEX) { 656 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 657 if (alps_detect(psmouse, set_properties) == 0) { 658 if (!set_properties || alps_init(psmouse) == 0) 659 return PSMOUSE_ALPS; 660 /* 661 * Init failed, try basic relative protocols 662 */ 663 max_proto = PSMOUSE_IMEX; 664 } 665 } 666 667 /* 668 * Try OLPC HGPK touchpad. 669 */ 670 if (max_proto > PSMOUSE_IMEX && 671 hgpk_detect(psmouse, set_properties) == 0) { 672 if (!set_properties || hgpk_init(psmouse) == 0) 673 return PSMOUSE_HGPK; 674 /* 675 * Init failed, try basic relative protocols 676 */ 677 max_proto = PSMOUSE_IMEX; 678 } 679 680 /* 681 * Try Elantech touchpad. 682 */ 683 if (max_proto > PSMOUSE_IMEX && 684 elantech_detect(psmouse, set_properties) == 0) { 685 if (!set_properties || elantech_init(psmouse) == 0) 686 return PSMOUSE_ELANTECH; 687 /* 688 * Init failed, try basic relative protocols 689 */ 690 max_proto = PSMOUSE_IMEX; 691 } 692 693 694 if (max_proto > PSMOUSE_IMEX) { 695 if (genius_detect(psmouse, set_properties) == 0) 696 return PSMOUSE_GENPS; 697 698 if (ps2pp_init(psmouse, set_properties) == 0) 699 return PSMOUSE_PS2PP; 700 701 if (trackpoint_detect(psmouse, set_properties) == 0) 702 return PSMOUSE_TRACKPOINT; 703 704 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 705 return PSMOUSE_TOUCHKIT_PS2; 706 } 707 708 /* 709 * Try Finger Sensing Pad. We do it here because its probe upsets 710 * Trackpoint devices (causing TP_READ_ID command to time out). 711 */ 712 if (max_proto > PSMOUSE_IMEX) { 713 if (fsp_detect(psmouse, set_properties) == 0) { 714 if (!set_properties || fsp_init(psmouse) == 0) 715 return PSMOUSE_FSP; 716 /* 717 * Init failed, try basic relative protocols 718 */ 719 max_proto = PSMOUSE_IMEX; 720 } 721 } 722 723 /* 724 * Reset to defaults in case the device got confused by extended 725 * protocol probes. Note that we follow up with full reset because 726 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 727 */ 728 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 729 psmouse_reset(psmouse); 730 731 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 732 return PSMOUSE_IMEX; 733 734 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 735 return PSMOUSE_IMPS; 736 737 /* 738 * Okay, all failed, we have a standard mouse here. The number of the buttons 739 * is still a question, though. We assume 3. 740 */ 741 ps2bare_detect(psmouse, set_properties); 742 743 if (synaptics_hardware) { 744 /* 745 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 746 * We need to reset the touchpad because if there is a track point on the 747 * pass through port it could get disabled while probing for protocol 748 * extensions. 749 */ 750 psmouse_reset(psmouse); 751 } 752 753 return PSMOUSE_PS2; 754 } 755 756 static const struct psmouse_protocol psmouse_protocols[] = { 757 { 758 .type = PSMOUSE_PS2, 759 .name = "PS/2", 760 .alias = "bare", 761 .maxproto = true, 762 .detect = ps2bare_detect, 763 }, 764 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 765 { 766 .type = PSMOUSE_PS2PP, 767 .name = "PS2++", 768 .alias = "logitech", 769 .detect = ps2pp_init, 770 }, 771 #endif 772 { 773 .type = PSMOUSE_THINKPS, 774 .name = "ThinkPS/2", 775 .alias = "thinkps", 776 .detect = thinking_detect, 777 }, 778 { 779 .type = PSMOUSE_GENPS, 780 .name = "GenPS/2", 781 .alias = "genius", 782 .detect = genius_detect, 783 }, 784 { 785 .type = PSMOUSE_IMPS, 786 .name = "ImPS/2", 787 .alias = "imps", 788 .maxproto = true, 789 .detect = intellimouse_detect, 790 }, 791 { 792 .type = PSMOUSE_IMEX, 793 .name = "ImExPS/2", 794 .alias = "exps", 795 .maxproto = true, 796 .detect = im_explorer_detect, 797 }, 798 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 799 { 800 .type = PSMOUSE_SYNAPTICS, 801 .name = "SynPS/2", 802 .alias = "synaptics", 803 .detect = synaptics_detect, 804 .init = synaptics_init, 805 }, 806 #endif 807 #ifdef CONFIG_MOUSE_PS2_ALPS 808 { 809 .type = PSMOUSE_ALPS, 810 .name = "AlpsPS/2", 811 .alias = "alps", 812 .detect = alps_detect, 813 .init = alps_init, 814 }, 815 #endif 816 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 817 { 818 .type = PSMOUSE_LIFEBOOK, 819 .name = "LBPS/2", 820 .alias = "lifebook", 821 .init = lifebook_init, 822 }, 823 #endif 824 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 825 { 826 .type = PSMOUSE_TRACKPOINT, 827 .name = "TPPS/2", 828 .alias = "trackpoint", 829 .detect = trackpoint_detect, 830 }, 831 #endif 832 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 833 { 834 .type = PSMOUSE_TOUCHKIT_PS2, 835 .name = "touchkitPS/2", 836 .alias = "touchkit", 837 .detect = touchkit_ps2_detect, 838 }, 839 #endif 840 #ifdef CONFIG_MOUSE_PS2_OLPC 841 { 842 .type = PSMOUSE_HGPK, 843 .name = "OLPC HGPK", 844 .alias = "hgpk", 845 .detect = hgpk_detect, 846 }, 847 #endif 848 #ifdef CONFIG_MOUSE_PS2_ELANTECH 849 { 850 .type = PSMOUSE_ELANTECH, 851 .name = "ETPS/2", 852 .alias = "elantech", 853 .detect = elantech_detect, 854 .init = elantech_init, 855 }, 856 #endif 857 #ifdef CONFIG_MOUSE_PS2_SENTELIC 858 { 859 .type = PSMOUSE_FSP, 860 .name = "FSPPS/2", 861 .alias = "fsp", 862 .detect = fsp_detect, 863 .init = fsp_init, 864 }, 865 #endif 866 { 867 .type = PSMOUSE_CORTRON, 868 .name = "CortronPS/2", 869 .alias = "cortps", 870 .detect = cortron_detect, 871 }, 872 { 873 .type = PSMOUSE_AUTO, 874 .name = "auto", 875 .alias = "any", 876 .maxproto = true, 877 }, 878 }; 879 880 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 881 { 882 int i; 883 884 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 885 if (psmouse_protocols[i].type == type) 886 return &psmouse_protocols[i]; 887 888 WARN_ON(1); 889 return &psmouse_protocols[0]; 890 } 891 892 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 893 { 894 const struct psmouse_protocol *p; 895 int i; 896 897 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 898 p = &psmouse_protocols[i]; 899 900 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 901 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 902 return &psmouse_protocols[i]; 903 } 904 905 return NULL; 906 } 907 908 909 /* 910 * psmouse_probe() probes for a PS/2 mouse. 911 */ 912 913 static int psmouse_probe(struct psmouse *psmouse) 914 { 915 struct ps2dev *ps2dev = &psmouse->ps2dev; 916 unsigned char param[2]; 917 918 /* 919 * First, we check if it's a mouse. It should send 0x00 or 0x03 920 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 921 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 922 * ID queries, probably due to a firmware bug. 923 */ 924 925 param[0] = 0xa5; 926 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 927 return -1; 928 929 if (param[0] != 0x00 && param[0] != 0x03 && 930 param[0] != 0x04 && param[0] != 0xff) 931 return -1; 932 933 /* 934 * Then we reset and disable the mouse so that it doesn't generate events. 935 */ 936 937 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 938 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 939 940 return 0; 941 } 942 943 /* 944 * Here we set the mouse resolution. 945 */ 946 947 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 948 { 949 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 950 unsigned char p; 951 952 if (resolution == 0 || resolution > 200) 953 resolution = 200; 954 955 p = params[resolution / 50]; 956 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 957 psmouse->resolution = 25 << p; 958 } 959 960 /* 961 * Here we set the mouse report rate. 962 */ 963 964 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 965 { 966 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 967 unsigned char r; 968 int i = 0; 969 970 while (rates[i] > rate) i++; 971 r = rates[i]; 972 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 973 psmouse->rate = r; 974 } 975 976 /* 977 * psmouse_initialize() initializes the mouse to a sane state. 978 */ 979 980 static void psmouse_initialize(struct psmouse *psmouse) 981 { 982 /* 983 * We set the mouse report rate, resolution and scaling. 984 */ 985 986 if (psmouse_max_proto != PSMOUSE_PS2) { 987 psmouse->set_rate(psmouse, psmouse->rate); 988 psmouse->set_resolution(psmouse, psmouse->resolution); 989 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 990 } 991 } 992 993 /* 994 * psmouse_activate() enables the mouse so that we get motion reports from it. 995 */ 996 997 static void psmouse_activate(struct psmouse *psmouse) 998 { 999 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1000 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 1001 psmouse->ps2dev.serio->phys); 1002 1003 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1004 } 1005 1006 1007 /* 1008 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 1009 * reports from it unless we explicitly request it. 1010 */ 1011 1012 static void psmouse_deactivate(struct psmouse *psmouse) 1013 { 1014 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1015 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 1016 psmouse->ps2dev.serio->phys); 1017 1018 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1019 } 1020 1021 /* 1022 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 1023 */ 1024 1025 static int psmouse_poll(struct psmouse *psmouse) 1026 { 1027 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1028 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1029 } 1030 1031 1032 /* 1033 * psmouse_resync() attempts to re-validate current protocol. 1034 */ 1035 1036 static void psmouse_resync(struct work_struct *work) 1037 { 1038 struct psmouse *parent = NULL, *psmouse = 1039 container_of(work, struct psmouse, resync_work.work); 1040 struct serio *serio = psmouse->ps2dev.serio; 1041 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1042 bool failed = false, enabled = false; 1043 int i; 1044 1045 mutex_lock(&psmouse_mutex); 1046 1047 if (psmouse->state != PSMOUSE_RESYNCING) 1048 goto out; 1049 1050 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1051 parent = serio_get_drvdata(serio->parent); 1052 psmouse_deactivate(parent); 1053 } 1054 1055 /* 1056 * Some mice don't ACK commands sent while they are in the middle of 1057 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1058 * instead of ps2_command() which would wait for 200ms for an ACK 1059 * that may never come. 1060 * As an additional quirk ALPS touchpads may not only forget to ACK 1061 * disable command but will stop reporting taps, so if we see that 1062 * mouse at least once ACKs disable we will do full reconnect if ACK 1063 * is missing. 1064 */ 1065 psmouse->num_resyncs++; 1066 1067 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1068 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1069 failed = true; 1070 } else 1071 psmouse->acks_disable_command = true; 1072 1073 /* 1074 * Poll the mouse. If it was reset the packet will be shorter than 1075 * psmouse->pktsize and ps2_command will fail. We do not expect and 1076 * do not handle scenario when mouse "upgrades" its protocol while 1077 * disconnected since it would require additional delay. If we ever 1078 * see a mouse that does it we'll adjust the code. 1079 */ 1080 if (!failed) { 1081 if (psmouse->poll(psmouse)) 1082 failed = true; 1083 else { 1084 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1085 for (i = 0; i < psmouse->pktsize; i++) { 1086 psmouse->pktcnt++; 1087 rc = psmouse->protocol_handler(psmouse); 1088 if (rc != PSMOUSE_GOOD_DATA) 1089 break; 1090 } 1091 if (rc != PSMOUSE_FULL_PACKET) 1092 failed = true; 1093 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1094 } 1095 } 1096 /* 1097 * Now try to enable mouse. We try to do that even if poll failed and also 1098 * repeat our attempts 5 times, otherwise we may be left out with disabled 1099 * mouse. 1100 */ 1101 for (i = 0; i < 5; i++) { 1102 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1103 enabled = true; 1104 break; 1105 } 1106 msleep(200); 1107 } 1108 1109 if (!enabled) { 1110 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1111 psmouse->ps2dev.serio->phys); 1112 failed = true; 1113 } 1114 1115 if (failed) { 1116 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1117 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1118 serio_reconnect(serio); 1119 } else 1120 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1121 1122 if (parent) 1123 psmouse_activate(parent); 1124 out: 1125 mutex_unlock(&psmouse_mutex); 1126 } 1127 1128 /* 1129 * psmouse_cleanup() resets the mouse into power-on state. 1130 */ 1131 1132 static void psmouse_cleanup(struct serio *serio) 1133 { 1134 struct psmouse *psmouse = serio_get_drvdata(serio); 1135 struct psmouse *parent = NULL; 1136 1137 mutex_lock(&psmouse_mutex); 1138 1139 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1140 parent = serio_get_drvdata(serio->parent); 1141 psmouse_deactivate(parent); 1142 } 1143 1144 psmouse_deactivate(psmouse); 1145 1146 if (psmouse->cleanup) 1147 psmouse->cleanup(psmouse); 1148 1149 /* 1150 * Reset the mouse to defaults (bare PS/2 protocol). 1151 */ 1152 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1153 1154 /* 1155 * Some boxes, such as HP nx7400, get terribly confused if mouse 1156 * is not fully enabled before suspending/shutting down. 1157 */ 1158 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1159 1160 if (parent) { 1161 if (parent->pt_deactivate) 1162 parent->pt_deactivate(parent); 1163 1164 psmouse_activate(parent); 1165 } 1166 1167 mutex_unlock(&psmouse_mutex); 1168 } 1169 1170 /* 1171 * psmouse_disconnect() closes and frees. 1172 */ 1173 1174 static void psmouse_disconnect(struct serio *serio) 1175 { 1176 struct psmouse *psmouse, *parent = NULL; 1177 1178 psmouse = serio_get_drvdata(serio); 1179 1180 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1181 1182 mutex_lock(&psmouse_mutex); 1183 1184 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1185 1186 /* make sure we don't have a resync in progress */ 1187 mutex_unlock(&psmouse_mutex); 1188 flush_workqueue(kpsmoused_wq); 1189 mutex_lock(&psmouse_mutex); 1190 1191 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1192 parent = serio_get_drvdata(serio->parent); 1193 psmouse_deactivate(parent); 1194 } 1195 1196 if (psmouse->disconnect) 1197 psmouse->disconnect(psmouse); 1198 1199 if (parent && parent->pt_deactivate) 1200 parent->pt_deactivate(parent); 1201 1202 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1203 1204 serio_close(serio); 1205 serio_set_drvdata(serio, NULL); 1206 input_unregister_device(psmouse->dev); 1207 kfree(psmouse); 1208 1209 if (parent) 1210 psmouse_activate(parent); 1211 1212 mutex_unlock(&psmouse_mutex); 1213 } 1214 1215 static int psmouse_switch_protocol(struct psmouse *psmouse, 1216 const struct psmouse_protocol *proto) 1217 { 1218 struct input_dev *input_dev = psmouse->dev; 1219 1220 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1221 1222 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1223 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = 1224 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 1225 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1226 1227 psmouse->set_rate = psmouse_set_rate; 1228 psmouse->set_resolution = psmouse_set_resolution; 1229 psmouse->poll = psmouse_poll; 1230 psmouse->protocol_handler = psmouse_process_byte; 1231 psmouse->pktsize = 3; 1232 1233 if (proto && (proto->detect || proto->init)) { 1234 if (proto->detect && proto->detect(psmouse, 1) < 0) 1235 return -1; 1236 1237 if (proto->init && proto->init(psmouse) < 0) 1238 return -1; 1239 1240 psmouse->type = proto->type; 1241 } else 1242 psmouse->type = psmouse_extensions(psmouse, 1243 psmouse_max_proto, true); 1244 1245 /* 1246 * If mouse's packet size is 3 there is no point in polling the 1247 * device in hopes to detect protocol reset - we won't get less 1248 * than 3 bytes response anyhow. 1249 */ 1250 if (psmouse->pktsize == 3) 1251 psmouse->resync_time = 0; 1252 1253 /* 1254 * Some smart KVMs fake response to POLL command returning just 1255 * 3 bytes and messing up our resync logic, so if initial poll 1256 * fails we won't try polling the device anymore. Hopefully 1257 * such KVM will maintain initially selected protocol. 1258 */ 1259 if (psmouse->resync_time && psmouse->poll(psmouse)) 1260 psmouse->resync_time = 0; 1261 1262 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1263 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1264 1265 input_dev->name = psmouse->devname; 1266 input_dev->phys = psmouse->phys; 1267 input_dev->id.bustype = BUS_I8042; 1268 input_dev->id.vendor = 0x0002; 1269 input_dev->id.product = psmouse->type; 1270 input_dev->id.version = psmouse->model; 1271 1272 return 0; 1273 } 1274 1275 /* 1276 * psmouse_connect() is a callback from the serio module when 1277 * an unhandled serio port is found. 1278 */ 1279 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1280 { 1281 struct psmouse *psmouse, *parent = NULL; 1282 struct input_dev *input_dev; 1283 int retval = 0, error = -ENOMEM; 1284 1285 mutex_lock(&psmouse_mutex); 1286 1287 /* 1288 * If this is a pass-through port deactivate parent so the device 1289 * connected to this port can be successfully identified 1290 */ 1291 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1292 parent = serio_get_drvdata(serio->parent); 1293 psmouse_deactivate(parent); 1294 } 1295 1296 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1297 input_dev = input_allocate_device(); 1298 if (!psmouse || !input_dev) 1299 goto err_free; 1300 1301 ps2_init(&psmouse->ps2dev, serio); 1302 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1303 psmouse->dev = input_dev; 1304 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1305 1306 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1307 1308 serio_set_drvdata(serio, psmouse); 1309 1310 error = serio_open(serio, drv); 1311 if (error) 1312 goto err_clear_drvdata; 1313 1314 if (psmouse_probe(psmouse) < 0) { 1315 error = -ENODEV; 1316 goto err_close_serio; 1317 } 1318 1319 psmouse->rate = psmouse_rate; 1320 psmouse->resolution = psmouse_resolution; 1321 psmouse->resetafter = psmouse_resetafter; 1322 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1323 psmouse->smartscroll = psmouse_smartscroll; 1324 1325 psmouse_switch_protocol(psmouse, NULL); 1326 1327 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1328 psmouse_initialize(psmouse); 1329 1330 error = input_register_device(psmouse->dev); 1331 if (error) 1332 goto err_protocol_disconnect; 1333 1334 if (parent && parent->pt_activate) 1335 parent->pt_activate(parent); 1336 1337 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1338 if (error) 1339 goto err_pt_deactivate; 1340 1341 psmouse_activate(psmouse); 1342 1343 out: 1344 /* If this is a pass-through port the parent needs to be re-activated */ 1345 if (parent) 1346 psmouse_activate(parent); 1347 1348 mutex_unlock(&psmouse_mutex); 1349 return retval; 1350 1351 err_pt_deactivate: 1352 if (parent && parent->pt_deactivate) 1353 parent->pt_deactivate(parent); 1354 input_unregister_device(psmouse->dev); 1355 input_dev = NULL; /* so we don't try to free it below */ 1356 err_protocol_disconnect: 1357 if (psmouse->disconnect) 1358 psmouse->disconnect(psmouse); 1359 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1360 err_close_serio: 1361 serio_close(serio); 1362 err_clear_drvdata: 1363 serio_set_drvdata(serio, NULL); 1364 err_free: 1365 input_free_device(input_dev); 1366 kfree(psmouse); 1367 1368 retval = error; 1369 goto out; 1370 } 1371 1372 1373 static int psmouse_reconnect(struct serio *serio) 1374 { 1375 struct psmouse *psmouse = serio_get_drvdata(serio); 1376 struct psmouse *parent = NULL; 1377 struct serio_driver *drv = serio->drv; 1378 int rc = -1; 1379 1380 if (!drv || !psmouse) { 1381 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1382 return -1; 1383 } 1384 1385 mutex_lock(&psmouse_mutex); 1386 1387 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1388 parent = serio_get_drvdata(serio->parent); 1389 psmouse_deactivate(parent); 1390 } 1391 1392 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1393 1394 if (psmouse->reconnect) { 1395 if (psmouse->reconnect(psmouse)) 1396 goto out; 1397 } else if (psmouse_probe(psmouse) < 0 || 1398 psmouse->type != psmouse_extensions(psmouse, 1399 psmouse_max_proto, false)) { 1400 goto out; 1401 } 1402 1403 /* ok, the device type (and capabilities) match the old one, 1404 * we can continue using it, complete intialization 1405 */ 1406 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1407 1408 psmouse_initialize(psmouse); 1409 1410 if (parent && parent->pt_activate) 1411 parent->pt_activate(parent); 1412 1413 psmouse_activate(psmouse); 1414 rc = 0; 1415 1416 out: 1417 /* If this is a pass-through port the parent waits to be activated */ 1418 if (parent) 1419 psmouse_activate(parent); 1420 1421 mutex_unlock(&psmouse_mutex); 1422 return rc; 1423 } 1424 1425 static struct serio_device_id psmouse_serio_ids[] = { 1426 { 1427 .type = SERIO_8042, 1428 .proto = SERIO_ANY, 1429 .id = SERIO_ANY, 1430 .extra = SERIO_ANY, 1431 }, 1432 { 1433 .type = SERIO_PS_PSTHRU, 1434 .proto = SERIO_ANY, 1435 .id = SERIO_ANY, 1436 .extra = SERIO_ANY, 1437 }, 1438 { 0 } 1439 }; 1440 1441 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1442 1443 static struct serio_driver psmouse_drv = { 1444 .driver = { 1445 .name = "psmouse", 1446 }, 1447 .description = DRIVER_DESC, 1448 .id_table = psmouse_serio_ids, 1449 .interrupt = psmouse_interrupt, 1450 .connect = psmouse_connect, 1451 .reconnect = psmouse_reconnect, 1452 .disconnect = psmouse_disconnect, 1453 .cleanup = psmouse_cleanup, 1454 }; 1455 1456 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1457 char *buf) 1458 { 1459 struct serio *serio = to_serio_port(dev); 1460 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1461 struct psmouse *psmouse; 1462 1463 psmouse = serio_get_drvdata(serio); 1464 1465 return attr->show(psmouse, attr->data, buf); 1466 } 1467 1468 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1469 const char *buf, size_t count) 1470 { 1471 struct serio *serio = to_serio_port(dev); 1472 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1473 struct psmouse *psmouse, *parent = NULL; 1474 int retval; 1475 1476 retval = mutex_lock_interruptible(&psmouse_mutex); 1477 if (retval) 1478 goto out; 1479 1480 psmouse = serio_get_drvdata(serio); 1481 1482 if (attr->protect) { 1483 if (psmouse->state == PSMOUSE_IGNORE) { 1484 retval = -ENODEV; 1485 goto out_unlock; 1486 } 1487 1488 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1489 parent = serio_get_drvdata(serio->parent); 1490 psmouse_deactivate(parent); 1491 } 1492 1493 psmouse_deactivate(psmouse); 1494 } 1495 1496 retval = attr->set(psmouse, attr->data, buf, count); 1497 1498 if (attr->protect) { 1499 if (retval != -ENODEV) 1500 psmouse_activate(psmouse); 1501 1502 if (parent) 1503 psmouse_activate(parent); 1504 } 1505 1506 out_unlock: 1507 mutex_unlock(&psmouse_mutex); 1508 out: 1509 return retval; 1510 } 1511 1512 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1513 { 1514 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1515 1516 return sprintf(buf, "%u\n", *field); 1517 } 1518 1519 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1520 { 1521 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1522 unsigned long value; 1523 1524 if (strict_strtoul(buf, 10, &value)) 1525 return -EINVAL; 1526 1527 if ((unsigned int)value != value) 1528 return -EINVAL; 1529 1530 *field = value; 1531 1532 return count; 1533 } 1534 1535 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1536 { 1537 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1538 } 1539 1540 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1541 { 1542 struct serio *serio = psmouse->ps2dev.serio; 1543 struct psmouse *parent = NULL; 1544 struct input_dev *old_dev, *new_dev; 1545 const struct psmouse_protocol *proto, *old_proto; 1546 int error; 1547 int retry = 0; 1548 1549 proto = psmouse_protocol_by_name(buf, count); 1550 if (!proto) 1551 return -EINVAL; 1552 1553 if (psmouse->type == proto->type) 1554 return count; 1555 1556 new_dev = input_allocate_device(); 1557 if (!new_dev) 1558 return -ENOMEM; 1559 1560 while (serio->child) { 1561 if (++retry > 3) { 1562 printk(KERN_WARNING 1563 "psmouse: failed to destroy child port, " 1564 "protocol change aborted.\n"); 1565 input_free_device(new_dev); 1566 return -EIO; 1567 } 1568 1569 mutex_unlock(&psmouse_mutex); 1570 serio_unregister_child_port(serio); 1571 mutex_lock(&psmouse_mutex); 1572 1573 if (serio->drv != &psmouse_drv) { 1574 input_free_device(new_dev); 1575 return -ENODEV; 1576 } 1577 1578 if (psmouse->type == proto->type) { 1579 input_free_device(new_dev); 1580 return count; /* switched by other thread */ 1581 } 1582 } 1583 1584 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1585 parent = serio_get_drvdata(serio->parent); 1586 if (parent->pt_deactivate) 1587 parent->pt_deactivate(parent); 1588 } 1589 1590 old_dev = psmouse->dev; 1591 old_proto = psmouse_protocol_by_type(psmouse->type); 1592 1593 if (psmouse->disconnect) 1594 psmouse->disconnect(psmouse); 1595 1596 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1597 1598 psmouse->dev = new_dev; 1599 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1600 1601 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1602 psmouse_reset(psmouse); 1603 /* default to PSMOUSE_PS2 */ 1604 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1605 } 1606 1607 psmouse_initialize(psmouse); 1608 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1609 1610 error = input_register_device(psmouse->dev); 1611 if (error) { 1612 if (psmouse->disconnect) 1613 psmouse->disconnect(psmouse); 1614 1615 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1616 input_free_device(new_dev); 1617 psmouse->dev = old_dev; 1618 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1619 psmouse_switch_protocol(psmouse, old_proto); 1620 psmouse_initialize(psmouse); 1621 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1622 1623 return error; 1624 } 1625 1626 input_unregister_device(old_dev); 1627 1628 if (parent && parent->pt_activate) 1629 parent->pt_activate(parent); 1630 1631 return count; 1632 } 1633 1634 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1635 { 1636 unsigned long value; 1637 1638 if (strict_strtoul(buf, 10, &value)) 1639 return -EINVAL; 1640 1641 psmouse->set_rate(psmouse, value); 1642 return count; 1643 } 1644 1645 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1646 { 1647 unsigned long value; 1648 1649 if (strict_strtoul(buf, 10, &value)) 1650 return -EINVAL; 1651 1652 psmouse->set_resolution(psmouse, value); 1653 return count; 1654 } 1655 1656 1657 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1658 { 1659 const struct psmouse_protocol *proto; 1660 1661 if (!val) 1662 return -EINVAL; 1663 1664 proto = psmouse_protocol_by_name(val, strlen(val)); 1665 1666 if (!proto || !proto->maxproto) 1667 return -EINVAL; 1668 1669 *((unsigned int *)kp->arg) = proto->type; 1670 1671 return 0; 1672 } 1673 1674 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1675 { 1676 int type = *((unsigned int *)kp->arg); 1677 1678 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1679 } 1680 1681 static int __init psmouse_init(void) 1682 { 1683 int err; 1684 1685 lifebook_module_init(); 1686 synaptics_module_init(); 1687 1688 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1689 if (!kpsmoused_wq) { 1690 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1691 return -ENOMEM; 1692 } 1693 1694 err = serio_register_driver(&psmouse_drv); 1695 if (err) 1696 destroy_workqueue(kpsmoused_wq); 1697 1698 return err; 1699 } 1700 1701 static void __exit psmouse_exit(void) 1702 { 1703 serio_unregister_driver(&psmouse_drv); 1704 destroy_workqueue(kpsmoused_wq); 1705 } 1706 1707 module_init(psmouse_init); 1708 module_exit(psmouse_exit); 1709