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 bool ignore_parity; /* Protocol should ignore parity errors from KBC */ 114 const char *name; 115 const char *alias; 116 int (*detect)(struct psmouse *, bool); 117 int (*init)(struct psmouse *); 118 }; 119 120 /* 121 * psmouse_process_byte() analyzes the PS/2 data stream and reports 122 * relevant events to the input module once full packet has arrived. 123 */ 124 125 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 126 { 127 struct input_dev *dev = psmouse->dev; 128 unsigned char *packet = psmouse->packet; 129 130 if (psmouse->pktcnt < psmouse->pktsize) 131 return PSMOUSE_GOOD_DATA; 132 133 /* 134 * Full packet accumulated, process it 135 */ 136 137 /* 138 * Scroll wheel on IntelliMice, scroll buttons on NetMice 139 */ 140 141 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 142 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 143 144 /* 145 * Scroll wheel and buttons on IntelliMouse Explorer 146 */ 147 148 if (psmouse->type == PSMOUSE_IMEX) { 149 switch (packet[3] & 0xC0) { 150 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 151 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 152 break; 153 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 154 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 155 break; 156 case 0x00: 157 case 0xC0: 158 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 159 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 160 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 161 break; 162 } 163 } 164 165 /* 166 * Extra buttons on Genius NewNet 3D 167 */ 168 169 if (psmouse->type == PSMOUSE_GENPS) { 170 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 171 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 172 } 173 174 /* 175 * Extra button on ThinkingMouse 176 */ 177 if (psmouse->type == PSMOUSE_THINKPS) { 178 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 179 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 180 packet[1] |= (packet[0] & 0x40) << 1; 181 } 182 183 /* 184 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 185 * byte. 186 */ 187 if (psmouse->type == PSMOUSE_CORTRON) { 188 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 189 packet[0] |= 0x08; 190 } 191 192 /* 193 * Generic PS/2 Mouse 194 */ 195 196 input_report_key(dev, BTN_LEFT, packet[0] & 1); 197 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 198 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 199 200 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 201 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 202 203 input_sync(dev); 204 205 return PSMOUSE_FULL_PACKET; 206 } 207 208 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 209 unsigned long delay) 210 { 211 queue_delayed_work(kpsmoused_wq, work, delay); 212 } 213 214 /* 215 * __psmouse_set_state() sets new psmouse state and resets all flags. 216 */ 217 218 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 219 { 220 psmouse->state = new_state; 221 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 222 psmouse->ps2dev.flags = 0; 223 psmouse->last = jiffies; 224 } 225 226 227 /* 228 * psmouse_set_state() sets new psmouse state and resets all flags and 229 * counters while holding serio lock so fighting with interrupt handler 230 * is not a concern. 231 */ 232 233 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 234 { 235 serio_pause_rx(psmouse->ps2dev.serio); 236 __psmouse_set_state(psmouse, new_state); 237 serio_continue_rx(psmouse->ps2dev.serio); 238 } 239 240 /* 241 * psmouse_handle_byte() processes one byte of the input data stream 242 * by calling corresponding protocol handler. 243 */ 244 245 static int psmouse_handle_byte(struct psmouse *psmouse) 246 { 247 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 248 249 switch (rc) { 250 case PSMOUSE_BAD_DATA: 251 if (psmouse->state == PSMOUSE_ACTIVATED) { 252 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 253 psmouse->name, psmouse->phys, psmouse->pktcnt); 254 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 255 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 256 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 257 serio_reconnect(psmouse->ps2dev.serio); 258 return -1; 259 } 260 } 261 psmouse->pktcnt = 0; 262 break; 263 264 case PSMOUSE_FULL_PACKET: 265 psmouse->pktcnt = 0; 266 if (psmouse->out_of_sync_cnt) { 267 psmouse->out_of_sync_cnt = 0; 268 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 269 psmouse->name, psmouse->phys); 270 } 271 break; 272 273 case PSMOUSE_GOOD_DATA: 274 break; 275 } 276 return 0; 277 } 278 279 /* 280 * psmouse_interrupt() handles incoming characters, either passing them 281 * for normal processing or gathering them as command response. 282 */ 283 284 static irqreturn_t psmouse_interrupt(struct serio *serio, 285 unsigned char data, unsigned int flags) 286 { 287 struct psmouse *psmouse = serio_get_drvdata(serio); 288 289 if (psmouse->state == PSMOUSE_IGNORE) 290 goto out; 291 292 if (unlikely((flags & SERIO_TIMEOUT) || 293 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) { 294 295 if (psmouse->state == PSMOUSE_ACTIVATED) 296 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 297 flags & SERIO_TIMEOUT ? " timeout" : "", 298 flags & SERIO_PARITY ? " bad parity" : ""); 299 ps2_cmd_aborted(&psmouse->ps2dev); 300 goto out; 301 } 302 303 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 304 if (ps2_handle_ack(&psmouse->ps2dev, data)) 305 goto out; 306 307 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 308 if (ps2_handle_response(&psmouse->ps2dev, data)) 309 goto out; 310 311 if (psmouse->state <= PSMOUSE_RESYNCING) 312 goto out; 313 314 if (psmouse->state == PSMOUSE_ACTIVATED && 315 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 316 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 317 psmouse->name, psmouse->phys, psmouse->pktcnt); 318 psmouse->badbyte = psmouse->packet[0]; 319 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 320 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 321 goto out; 322 } 323 324 psmouse->packet[psmouse->pktcnt++] = data; 325 /* 326 * Check if this is a new device announcement (0xAA 0x00) 327 */ 328 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 329 if (psmouse->pktcnt == 1) { 330 psmouse->last = jiffies; 331 goto out; 332 } 333 334 if (psmouse->packet[1] == PSMOUSE_RET_ID || 335 (psmouse->type == PSMOUSE_HGPK && 336 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 337 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 338 serio_reconnect(serio); 339 goto out; 340 } 341 /* 342 * Not a new device, try processing first byte normally 343 */ 344 psmouse->pktcnt = 1; 345 if (psmouse_handle_byte(psmouse)) 346 goto out; 347 348 psmouse->packet[psmouse->pktcnt++] = data; 349 } 350 351 /* 352 * See if we need to force resync because mouse was idle for too long 353 */ 354 if (psmouse->state == PSMOUSE_ACTIVATED && 355 psmouse->pktcnt == 1 && psmouse->resync_time && 356 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 357 psmouse->badbyte = psmouse->packet[0]; 358 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 359 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 360 goto out; 361 } 362 363 psmouse->last = jiffies; 364 psmouse_handle_byte(psmouse); 365 366 out: 367 return IRQ_HANDLED; 368 } 369 370 371 /* 372 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 373 * using sliced syntax, understood by advanced devices, such as Logitech 374 * or Synaptics touchpads. The command is encoded as: 375 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 376 * is the command. 377 */ 378 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 379 { 380 int i; 381 382 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 383 return -1; 384 385 for (i = 6; i >= 0; i -= 2) { 386 unsigned char d = (command >> i) & 3; 387 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 388 return -1; 389 } 390 391 return 0; 392 } 393 394 395 /* 396 * psmouse_reset() resets the mouse into power-on state. 397 */ 398 int psmouse_reset(struct psmouse *psmouse) 399 { 400 unsigned char param[2]; 401 402 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 403 return -1; 404 405 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 406 return -1; 407 408 return 0; 409 } 410 411 412 /* 413 * Genius NetMouse magic init. 414 */ 415 static int genius_detect(struct psmouse *psmouse, bool set_properties) 416 { 417 struct ps2dev *ps2dev = &psmouse->ps2dev; 418 unsigned char param[4]; 419 420 param[0] = 3; 421 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 422 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 423 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 424 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 425 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 426 427 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 428 return -1; 429 430 if (set_properties) { 431 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 432 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 433 __set_bit(BTN_SIDE, psmouse->dev->keybit); 434 __set_bit(REL_WHEEL, psmouse->dev->relbit); 435 436 psmouse->vendor = "Genius"; 437 psmouse->name = "Mouse"; 438 psmouse->pktsize = 4; 439 } 440 441 return 0; 442 } 443 444 /* 445 * IntelliMouse magic init. 446 */ 447 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 448 { 449 struct ps2dev *ps2dev = &psmouse->ps2dev; 450 unsigned char param[2]; 451 452 param[0] = 200; 453 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 454 param[0] = 100; 455 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 456 param[0] = 80; 457 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 458 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 459 460 if (param[0] != 3) 461 return -1; 462 463 if (set_properties) { 464 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 465 __set_bit(REL_WHEEL, psmouse->dev->relbit); 466 467 if (!psmouse->vendor) 468 psmouse->vendor = "Generic"; 469 if (!psmouse->name) 470 psmouse->name = "Wheel Mouse"; 471 psmouse->pktsize = 4; 472 } 473 474 return 0; 475 } 476 477 /* 478 * Try IntelliMouse/Explorer magic init. 479 */ 480 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 481 { 482 struct ps2dev *ps2dev = &psmouse->ps2dev; 483 unsigned char param[2]; 484 485 intellimouse_detect(psmouse, 0); 486 487 param[0] = 200; 488 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 489 param[0] = 200; 490 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 491 param[0] = 80; 492 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 493 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 494 495 if (param[0] != 4) 496 return -1; 497 498 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 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 param[0] = 40; 504 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 505 506 if (set_properties) { 507 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 508 __set_bit(REL_WHEEL, psmouse->dev->relbit); 509 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 510 __set_bit(BTN_SIDE, psmouse->dev->keybit); 511 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 512 513 if (!psmouse->vendor) 514 psmouse->vendor = "Generic"; 515 if (!psmouse->name) 516 psmouse->name = "Explorer Mouse"; 517 psmouse->pktsize = 4; 518 } 519 520 return 0; 521 } 522 523 /* 524 * Kensington ThinkingMouse / ExpertMouse magic init. 525 */ 526 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 527 { 528 struct ps2dev *ps2dev = &psmouse->ps2dev; 529 unsigned char param[2]; 530 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 531 int i; 532 533 param[0] = 10; 534 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 535 param[0] = 0; 536 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 537 for (i = 0; i < ARRAY_SIZE(seq); i++) { 538 param[0] = seq[i]; 539 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 540 } 541 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 542 543 if (param[0] != 2) 544 return -1; 545 546 if (set_properties) { 547 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 548 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 549 550 psmouse->vendor = "Kensington"; 551 psmouse->name = "ThinkingMouse"; 552 } 553 554 return 0; 555 } 556 557 /* 558 * Bare PS/2 protocol "detection". Always succeeds. 559 */ 560 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 561 { 562 if (set_properties) { 563 if (!psmouse->vendor) 564 psmouse->vendor = "Generic"; 565 if (!psmouse->name) 566 psmouse->name = "Mouse"; 567 568 /* 569 * We have no way of figuring true number of buttons so let's 570 * assume that the device has 3. 571 */ 572 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 573 } 574 575 return 0; 576 } 577 578 /* 579 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 580 * must be forced by sysfs protocol writing. 581 */ 582 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 583 { 584 if (set_properties) { 585 psmouse->vendor = "Cortron"; 586 psmouse->name = "PS/2 Trackball"; 587 588 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 589 __set_bit(BTN_SIDE, psmouse->dev->keybit); 590 } 591 592 return 0; 593 } 594 595 /* 596 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 597 * the mouse may have. 598 */ 599 600 static int psmouse_extensions(struct psmouse *psmouse, 601 unsigned int max_proto, bool set_properties) 602 { 603 bool synaptics_hardware = false; 604 605 /* 606 * We always check for lifebook because it does not disturb mouse 607 * (it only checks DMI information). 608 */ 609 if (lifebook_detect(psmouse, set_properties) == 0) { 610 if (max_proto > PSMOUSE_IMEX) { 611 if (!set_properties || lifebook_init(psmouse) == 0) 612 return PSMOUSE_LIFEBOOK; 613 } 614 } 615 616 /* 617 * Try Kensington ThinkingMouse (we try first, because synaptics probe 618 * upsets the thinkingmouse). 619 */ 620 621 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 622 return PSMOUSE_THINKPS; 623 624 /* 625 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 626 * support is disabled in config - we need to know if it is synaptics so we 627 * can reset it properly after probing for intellimouse. 628 */ 629 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 630 synaptics_hardware = true; 631 632 if (max_proto > PSMOUSE_IMEX) { 633 /* 634 * Try activating protocol, but check if support is enabled first, since 635 * we try detecting Synaptics even when protocol is disabled. 636 */ 637 if (synaptics_supported() && 638 (!set_properties || synaptics_init(psmouse) == 0)) { 639 return PSMOUSE_SYNAPTICS; 640 } 641 642 /* 643 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 644 * Unfortunately Logitech/Genius probes confuse some firmware versions so 645 * we'll have to skip them. 646 */ 647 max_proto = PSMOUSE_IMEX; 648 } 649 /* 650 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 651 */ 652 synaptics_reset(psmouse); 653 } 654 655 /* 656 * Try ALPS TouchPad 657 */ 658 if (max_proto > PSMOUSE_IMEX) { 659 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 660 if (alps_detect(psmouse, set_properties) == 0) { 661 if (!set_properties || alps_init(psmouse) == 0) 662 return PSMOUSE_ALPS; 663 /* 664 * Init failed, try basic relative protocols 665 */ 666 max_proto = PSMOUSE_IMEX; 667 } 668 } 669 670 /* 671 * Try OLPC HGPK touchpad. 672 */ 673 if (max_proto > PSMOUSE_IMEX && 674 hgpk_detect(psmouse, set_properties) == 0) { 675 if (!set_properties || hgpk_init(psmouse) == 0) 676 return PSMOUSE_HGPK; 677 /* 678 * Init failed, try basic relative protocols 679 */ 680 max_proto = PSMOUSE_IMEX; 681 } 682 683 /* 684 * Try Elantech touchpad. 685 */ 686 if (max_proto > PSMOUSE_IMEX && 687 elantech_detect(psmouse, set_properties) == 0) { 688 if (!set_properties || elantech_init(psmouse) == 0) 689 return PSMOUSE_ELANTECH; 690 /* 691 * Init failed, try basic relative protocols 692 */ 693 max_proto = PSMOUSE_IMEX; 694 } 695 696 697 if (max_proto > PSMOUSE_IMEX) { 698 if (genius_detect(psmouse, set_properties) == 0) 699 return PSMOUSE_GENPS; 700 701 if (ps2pp_init(psmouse, set_properties) == 0) 702 return PSMOUSE_PS2PP; 703 704 if (trackpoint_detect(psmouse, set_properties) == 0) 705 return PSMOUSE_TRACKPOINT; 706 707 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 708 return PSMOUSE_TOUCHKIT_PS2; 709 } 710 711 /* 712 * Try Finger Sensing Pad. We do it here because its probe upsets 713 * Trackpoint devices (causing TP_READ_ID command to time out). 714 */ 715 if (max_proto > PSMOUSE_IMEX) { 716 if (fsp_detect(psmouse, set_properties) == 0) { 717 if (!set_properties || fsp_init(psmouse) == 0) 718 return PSMOUSE_FSP; 719 /* 720 * Init failed, try basic relative protocols 721 */ 722 max_proto = PSMOUSE_IMEX; 723 } 724 } 725 726 /* 727 * Reset to defaults in case the device got confused by extended 728 * protocol probes. Note that we follow up with full reset because 729 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 730 */ 731 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 732 psmouse_reset(psmouse); 733 734 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 735 return PSMOUSE_IMEX; 736 737 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 738 return PSMOUSE_IMPS; 739 740 /* 741 * Okay, all failed, we have a standard mouse here. The number of the buttons 742 * is still a question, though. We assume 3. 743 */ 744 ps2bare_detect(psmouse, set_properties); 745 746 if (synaptics_hardware) { 747 /* 748 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 749 * We need to reset the touchpad because if there is a track point on the 750 * pass through port it could get disabled while probing for protocol 751 * extensions. 752 */ 753 psmouse_reset(psmouse); 754 } 755 756 return PSMOUSE_PS2; 757 } 758 759 static const struct psmouse_protocol psmouse_protocols[] = { 760 { 761 .type = PSMOUSE_PS2, 762 .name = "PS/2", 763 .alias = "bare", 764 .maxproto = true, 765 .ignore_parity = true, 766 .detect = ps2bare_detect, 767 }, 768 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 769 { 770 .type = PSMOUSE_PS2PP, 771 .name = "PS2++", 772 .alias = "logitech", 773 .detect = ps2pp_init, 774 }, 775 #endif 776 { 777 .type = PSMOUSE_THINKPS, 778 .name = "ThinkPS/2", 779 .alias = "thinkps", 780 .detect = thinking_detect, 781 }, 782 { 783 .type = PSMOUSE_GENPS, 784 .name = "GenPS/2", 785 .alias = "genius", 786 .detect = genius_detect, 787 }, 788 { 789 .type = PSMOUSE_IMPS, 790 .name = "ImPS/2", 791 .alias = "imps", 792 .maxproto = true, 793 .ignore_parity = true, 794 .detect = intellimouse_detect, 795 }, 796 { 797 .type = PSMOUSE_IMEX, 798 .name = "ImExPS/2", 799 .alias = "exps", 800 .maxproto = true, 801 .ignore_parity = true, 802 .detect = im_explorer_detect, 803 }, 804 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 805 { 806 .type = PSMOUSE_SYNAPTICS, 807 .name = "SynPS/2", 808 .alias = "synaptics", 809 .detect = synaptics_detect, 810 .init = synaptics_init, 811 }, 812 #endif 813 #ifdef CONFIG_MOUSE_PS2_ALPS 814 { 815 .type = PSMOUSE_ALPS, 816 .name = "AlpsPS/2", 817 .alias = "alps", 818 .detect = alps_detect, 819 .init = alps_init, 820 }, 821 #endif 822 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 823 { 824 .type = PSMOUSE_LIFEBOOK, 825 .name = "LBPS/2", 826 .alias = "lifebook", 827 .init = lifebook_init, 828 }, 829 #endif 830 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 831 { 832 .type = PSMOUSE_TRACKPOINT, 833 .name = "TPPS/2", 834 .alias = "trackpoint", 835 .detect = trackpoint_detect, 836 }, 837 #endif 838 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 839 { 840 .type = PSMOUSE_TOUCHKIT_PS2, 841 .name = "touchkitPS/2", 842 .alias = "touchkit", 843 .detect = touchkit_ps2_detect, 844 }, 845 #endif 846 #ifdef CONFIG_MOUSE_PS2_OLPC 847 { 848 .type = PSMOUSE_HGPK, 849 .name = "OLPC HGPK", 850 .alias = "hgpk", 851 .detect = hgpk_detect, 852 }, 853 #endif 854 #ifdef CONFIG_MOUSE_PS2_ELANTECH 855 { 856 .type = PSMOUSE_ELANTECH, 857 .name = "ETPS/2", 858 .alias = "elantech", 859 .detect = elantech_detect, 860 .init = elantech_init, 861 }, 862 #endif 863 #ifdef CONFIG_MOUSE_PS2_SENTELIC 864 { 865 .type = PSMOUSE_FSP, 866 .name = "FSPPS/2", 867 .alias = "fsp", 868 .detect = fsp_detect, 869 .init = fsp_init, 870 }, 871 #endif 872 { 873 .type = PSMOUSE_CORTRON, 874 .name = "CortronPS/2", 875 .alias = "cortps", 876 .detect = cortron_detect, 877 }, 878 { 879 .type = PSMOUSE_AUTO, 880 .name = "auto", 881 .alias = "any", 882 .maxproto = true, 883 }, 884 }; 885 886 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 887 { 888 int i; 889 890 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 891 if (psmouse_protocols[i].type == type) 892 return &psmouse_protocols[i]; 893 894 WARN_ON(1); 895 return &psmouse_protocols[0]; 896 } 897 898 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 899 { 900 const struct psmouse_protocol *p; 901 int i; 902 903 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 904 p = &psmouse_protocols[i]; 905 906 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 907 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 908 return &psmouse_protocols[i]; 909 } 910 911 return NULL; 912 } 913 914 915 /* 916 * psmouse_probe() probes for a PS/2 mouse. 917 */ 918 919 static int psmouse_probe(struct psmouse *psmouse) 920 { 921 struct ps2dev *ps2dev = &psmouse->ps2dev; 922 unsigned char param[2]; 923 924 /* 925 * First, we check if it's a mouse. It should send 0x00 or 0x03 926 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 927 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 928 * ID queries, probably due to a firmware bug. 929 */ 930 931 param[0] = 0xa5; 932 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 933 return -1; 934 935 if (param[0] != 0x00 && param[0] != 0x03 && 936 param[0] != 0x04 && param[0] != 0xff) 937 return -1; 938 939 /* 940 * Then we reset and disable the mouse so that it doesn't generate events. 941 */ 942 943 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 944 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 945 946 return 0; 947 } 948 949 /* 950 * Here we set the mouse resolution. 951 */ 952 953 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 954 { 955 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 956 unsigned char p; 957 958 if (resolution == 0 || resolution > 200) 959 resolution = 200; 960 961 p = params[resolution / 50]; 962 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 963 psmouse->resolution = 25 << p; 964 } 965 966 /* 967 * Here we set the mouse report rate. 968 */ 969 970 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 971 { 972 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 973 unsigned char r; 974 int i = 0; 975 976 while (rates[i] > rate) i++; 977 r = rates[i]; 978 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 979 psmouse->rate = r; 980 } 981 982 /* 983 * psmouse_initialize() initializes the mouse to a sane state. 984 */ 985 986 static void psmouse_initialize(struct psmouse *psmouse) 987 { 988 /* 989 * We set the mouse report rate, resolution and scaling. 990 */ 991 992 if (psmouse_max_proto != PSMOUSE_PS2) { 993 psmouse->set_rate(psmouse, psmouse->rate); 994 psmouse->set_resolution(psmouse, psmouse->resolution); 995 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 996 } 997 } 998 999 /* 1000 * psmouse_activate() enables the mouse so that we get motion reports from it. 1001 */ 1002 1003 static void psmouse_activate(struct psmouse *psmouse) 1004 { 1005 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1006 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 1007 psmouse->ps2dev.serio->phys); 1008 1009 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1010 } 1011 1012 1013 /* 1014 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 1015 * reports from it unless we explicitly request it. 1016 */ 1017 1018 static void psmouse_deactivate(struct psmouse *psmouse) 1019 { 1020 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1021 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 1022 psmouse->ps2dev.serio->phys); 1023 1024 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1025 } 1026 1027 /* 1028 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 1029 */ 1030 1031 static int psmouse_poll(struct psmouse *psmouse) 1032 { 1033 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1034 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1035 } 1036 1037 1038 /* 1039 * psmouse_resync() attempts to re-validate current protocol. 1040 */ 1041 1042 static void psmouse_resync(struct work_struct *work) 1043 { 1044 struct psmouse *parent = NULL, *psmouse = 1045 container_of(work, struct psmouse, resync_work.work); 1046 struct serio *serio = psmouse->ps2dev.serio; 1047 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1048 bool failed = false, enabled = false; 1049 int i; 1050 1051 mutex_lock(&psmouse_mutex); 1052 1053 if (psmouse->state != PSMOUSE_RESYNCING) 1054 goto out; 1055 1056 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1057 parent = serio_get_drvdata(serio->parent); 1058 psmouse_deactivate(parent); 1059 } 1060 1061 /* 1062 * Some mice don't ACK commands sent while they are in the middle of 1063 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1064 * instead of ps2_command() which would wait for 200ms for an ACK 1065 * that may never come. 1066 * As an additional quirk ALPS touchpads may not only forget to ACK 1067 * disable command but will stop reporting taps, so if we see that 1068 * mouse at least once ACKs disable we will do full reconnect if ACK 1069 * is missing. 1070 */ 1071 psmouse->num_resyncs++; 1072 1073 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1074 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1075 failed = true; 1076 } else 1077 psmouse->acks_disable_command = true; 1078 1079 /* 1080 * Poll the mouse. If it was reset the packet will be shorter than 1081 * psmouse->pktsize and ps2_command will fail. We do not expect and 1082 * do not handle scenario when mouse "upgrades" its protocol while 1083 * disconnected since it would require additional delay. If we ever 1084 * see a mouse that does it we'll adjust the code. 1085 */ 1086 if (!failed) { 1087 if (psmouse->poll(psmouse)) 1088 failed = true; 1089 else { 1090 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1091 for (i = 0; i < psmouse->pktsize; i++) { 1092 psmouse->pktcnt++; 1093 rc = psmouse->protocol_handler(psmouse); 1094 if (rc != PSMOUSE_GOOD_DATA) 1095 break; 1096 } 1097 if (rc != PSMOUSE_FULL_PACKET) 1098 failed = true; 1099 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1100 } 1101 } 1102 /* 1103 * Now try to enable mouse. We try to do that even if poll failed and also 1104 * repeat our attempts 5 times, otherwise we may be left out with disabled 1105 * mouse. 1106 */ 1107 for (i = 0; i < 5; i++) { 1108 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1109 enabled = true; 1110 break; 1111 } 1112 msleep(200); 1113 } 1114 1115 if (!enabled) { 1116 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1117 psmouse->ps2dev.serio->phys); 1118 failed = true; 1119 } 1120 1121 if (failed) { 1122 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1123 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1124 serio_reconnect(serio); 1125 } else 1126 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1127 1128 if (parent) 1129 psmouse_activate(parent); 1130 out: 1131 mutex_unlock(&psmouse_mutex); 1132 } 1133 1134 /* 1135 * psmouse_cleanup() resets the mouse into power-on state. 1136 */ 1137 1138 static void psmouse_cleanup(struct serio *serio) 1139 { 1140 struct psmouse *psmouse = serio_get_drvdata(serio); 1141 struct psmouse *parent = NULL; 1142 1143 mutex_lock(&psmouse_mutex); 1144 1145 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1146 parent = serio_get_drvdata(serio->parent); 1147 psmouse_deactivate(parent); 1148 } 1149 1150 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1151 1152 /* 1153 * Disable stream mode so cleanup routine can proceed undisturbed. 1154 */ 1155 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1156 printk(KERN_WARNING "psmouse.c: Failed to disable mouse on %s\n", 1157 psmouse->ps2dev.serio->phys); 1158 1159 if (psmouse->cleanup) 1160 psmouse->cleanup(psmouse); 1161 1162 /* 1163 * Reset the mouse to defaults (bare PS/2 protocol). 1164 */ 1165 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1166 1167 /* 1168 * Some boxes, such as HP nx7400, get terribly confused if mouse 1169 * is not fully enabled before suspending/shutting down. 1170 */ 1171 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1172 1173 if (parent) { 1174 if (parent->pt_deactivate) 1175 parent->pt_deactivate(parent); 1176 1177 psmouse_activate(parent); 1178 } 1179 1180 mutex_unlock(&psmouse_mutex); 1181 } 1182 1183 /* 1184 * psmouse_disconnect() closes and frees. 1185 */ 1186 1187 static void psmouse_disconnect(struct serio *serio) 1188 { 1189 struct psmouse *psmouse, *parent = NULL; 1190 1191 psmouse = serio_get_drvdata(serio); 1192 1193 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1194 1195 mutex_lock(&psmouse_mutex); 1196 1197 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1198 1199 /* make sure we don't have a resync in progress */ 1200 mutex_unlock(&psmouse_mutex); 1201 flush_workqueue(kpsmoused_wq); 1202 mutex_lock(&psmouse_mutex); 1203 1204 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1205 parent = serio_get_drvdata(serio->parent); 1206 psmouse_deactivate(parent); 1207 } 1208 1209 if (psmouse->disconnect) 1210 psmouse->disconnect(psmouse); 1211 1212 if (parent && parent->pt_deactivate) 1213 parent->pt_deactivate(parent); 1214 1215 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1216 1217 serio_close(serio); 1218 serio_set_drvdata(serio, NULL); 1219 input_unregister_device(psmouse->dev); 1220 kfree(psmouse); 1221 1222 if (parent) 1223 psmouse_activate(parent); 1224 1225 mutex_unlock(&psmouse_mutex); 1226 } 1227 1228 static int psmouse_switch_protocol(struct psmouse *psmouse, 1229 const struct psmouse_protocol *proto) 1230 { 1231 const struct psmouse_protocol *selected_proto; 1232 struct input_dev *input_dev = psmouse->dev; 1233 1234 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1235 1236 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1237 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = 1238 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 1239 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1240 1241 psmouse->set_rate = psmouse_set_rate; 1242 psmouse->set_resolution = psmouse_set_resolution; 1243 psmouse->poll = psmouse_poll; 1244 psmouse->protocol_handler = psmouse_process_byte; 1245 psmouse->pktsize = 3; 1246 1247 if (proto && (proto->detect || proto->init)) { 1248 if (proto->detect && proto->detect(psmouse, true) < 0) 1249 return -1; 1250 1251 if (proto->init && proto->init(psmouse) < 0) 1252 return -1; 1253 1254 psmouse->type = proto->type; 1255 selected_proto = proto; 1256 } else { 1257 psmouse->type = psmouse_extensions(psmouse, 1258 psmouse_max_proto, true); 1259 selected_proto = psmouse_protocol_by_type(psmouse->type); 1260 } 1261 1262 psmouse->ignore_parity = selected_proto->ignore_parity; 1263 1264 /* 1265 * If mouse's packet size is 3 there is no point in polling the 1266 * device in hopes to detect protocol reset - we won't get less 1267 * than 3 bytes response anyhow. 1268 */ 1269 if (psmouse->pktsize == 3) 1270 psmouse->resync_time = 0; 1271 1272 /* 1273 * Some smart KVMs fake response to POLL command returning just 1274 * 3 bytes and messing up our resync logic, so if initial poll 1275 * fails we won't try polling the device anymore. Hopefully 1276 * such KVM will maintain initially selected protocol. 1277 */ 1278 if (psmouse->resync_time && psmouse->poll(psmouse)) 1279 psmouse->resync_time = 0; 1280 1281 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1282 selected_proto->name, psmouse->vendor, psmouse->name); 1283 1284 input_dev->name = psmouse->devname; 1285 input_dev->phys = psmouse->phys; 1286 input_dev->id.bustype = BUS_I8042; 1287 input_dev->id.vendor = 0x0002; 1288 input_dev->id.product = psmouse->type; 1289 input_dev->id.version = psmouse->model; 1290 1291 return 0; 1292 } 1293 1294 /* 1295 * psmouse_connect() is a callback from the serio module when 1296 * an unhandled serio port is found. 1297 */ 1298 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1299 { 1300 struct psmouse *psmouse, *parent = NULL; 1301 struct input_dev *input_dev; 1302 int retval = 0, error = -ENOMEM; 1303 1304 mutex_lock(&psmouse_mutex); 1305 1306 /* 1307 * If this is a pass-through port deactivate parent so the device 1308 * connected to this port can be successfully identified 1309 */ 1310 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1311 parent = serio_get_drvdata(serio->parent); 1312 psmouse_deactivate(parent); 1313 } 1314 1315 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1316 input_dev = input_allocate_device(); 1317 if (!psmouse || !input_dev) 1318 goto err_free; 1319 1320 ps2_init(&psmouse->ps2dev, serio); 1321 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1322 psmouse->dev = input_dev; 1323 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1324 1325 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1326 1327 serio_set_drvdata(serio, psmouse); 1328 1329 error = serio_open(serio, drv); 1330 if (error) 1331 goto err_clear_drvdata; 1332 1333 if (psmouse_probe(psmouse) < 0) { 1334 error = -ENODEV; 1335 goto err_close_serio; 1336 } 1337 1338 psmouse->rate = psmouse_rate; 1339 psmouse->resolution = psmouse_resolution; 1340 psmouse->resetafter = psmouse_resetafter; 1341 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1342 psmouse->smartscroll = psmouse_smartscroll; 1343 1344 psmouse_switch_protocol(psmouse, NULL); 1345 1346 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1347 psmouse_initialize(psmouse); 1348 1349 error = input_register_device(psmouse->dev); 1350 if (error) 1351 goto err_protocol_disconnect; 1352 1353 if (parent && parent->pt_activate) 1354 parent->pt_activate(parent); 1355 1356 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1357 if (error) 1358 goto err_pt_deactivate; 1359 1360 psmouse_activate(psmouse); 1361 1362 out: 1363 /* If this is a pass-through port the parent needs to be re-activated */ 1364 if (parent) 1365 psmouse_activate(parent); 1366 1367 mutex_unlock(&psmouse_mutex); 1368 return retval; 1369 1370 err_pt_deactivate: 1371 if (parent && parent->pt_deactivate) 1372 parent->pt_deactivate(parent); 1373 input_unregister_device(psmouse->dev); 1374 input_dev = NULL; /* so we don't try to free it below */ 1375 err_protocol_disconnect: 1376 if (psmouse->disconnect) 1377 psmouse->disconnect(psmouse); 1378 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1379 err_close_serio: 1380 serio_close(serio); 1381 err_clear_drvdata: 1382 serio_set_drvdata(serio, NULL); 1383 err_free: 1384 input_free_device(input_dev); 1385 kfree(psmouse); 1386 1387 retval = error; 1388 goto out; 1389 } 1390 1391 1392 static int psmouse_reconnect(struct serio *serio) 1393 { 1394 struct psmouse *psmouse = serio_get_drvdata(serio); 1395 struct psmouse *parent = NULL; 1396 struct serio_driver *drv = serio->drv; 1397 unsigned char type; 1398 int rc = -1; 1399 1400 if (!drv || !psmouse) { 1401 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1402 return -1; 1403 } 1404 1405 mutex_lock(&psmouse_mutex); 1406 1407 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1408 parent = serio_get_drvdata(serio->parent); 1409 psmouse_deactivate(parent); 1410 } 1411 1412 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1413 1414 if (psmouse->reconnect) { 1415 if (psmouse->reconnect(psmouse)) 1416 goto out; 1417 } else { 1418 psmouse_reset(psmouse); 1419 1420 if (psmouse_probe(psmouse) < 0) 1421 goto out; 1422 1423 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1424 if (psmouse->type != type) 1425 goto out; 1426 } 1427 1428 /* ok, the device type (and capabilities) match the old one, 1429 * we can continue using it, complete intialization 1430 */ 1431 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1432 1433 psmouse_initialize(psmouse); 1434 1435 if (parent && parent->pt_activate) 1436 parent->pt_activate(parent); 1437 1438 psmouse_activate(psmouse); 1439 rc = 0; 1440 1441 out: 1442 /* If this is a pass-through port the parent waits to be activated */ 1443 if (parent) 1444 psmouse_activate(parent); 1445 1446 mutex_unlock(&psmouse_mutex); 1447 return rc; 1448 } 1449 1450 static struct serio_device_id psmouse_serio_ids[] = { 1451 { 1452 .type = SERIO_8042, 1453 .proto = SERIO_ANY, 1454 .id = SERIO_ANY, 1455 .extra = SERIO_ANY, 1456 }, 1457 { 1458 .type = SERIO_PS_PSTHRU, 1459 .proto = SERIO_ANY, 1460 .id = SERIO_ANY, 1461 .extra = SERIO_ANY, 1462 }, 1463 { 0 } 1464 }; 1465 1466 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1467 1468 static struct serio_driver psmouse_drv = { 1469 .driver = { 1470 .name = "psmouse", 1471 }, 1472 .description = DRIVER_DESC, 1473 .id_table = psmouse_serio_ids, 1474 .interrupt = psmouse_interrupt, 1475 .connect = psmouse_connect, 1476 .reconnect = psmouse_reconnect, 1477 .disconnect = psmouse_disconnect, 1478 .cleanup = psmouse_cleanup, 1479 }; 1480 1481 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1482 char *buf) 1483 { 1484 struct serio *serio = to_serio_port(dev); 1485 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1486 struct psmouse *psmouse; 1487 1488 psmouse = serio_get_drvdata(serio); 1489 1490 return attr->show(psmouse, attr->data, buf); 1491 } 1492 1493 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1494 const char *buf, size_t count) 1495 { 1496 struct serio *serio = to_serio_port(dev); 1497 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1498 struct psmouse *psmouse, *parent = NULL; 1499 int retval; 1500 1501 retval = mutex_lock_interruptible(&psmouse_mutex); 1502 if (retval) 1503 goto out; 1504 1505 psmouse = serio_get_drvdata(serio); 1506 1507 if (attr->protect) { 1508 if (psmouse->state == PSMOUSE_IGNORE) { 1509 retval = -ENODEV; 1510 goto out_unlock; 1511 } 1512 1513 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1514 parent = serio_get_drvdata(serio->parent); 1515 psmouse_deactivate(parent); 1516 } 1517 1518 psmouse_deactivate(psmouse); 1519 } 1520 1521 retval = attr->set(psmouse, attr->data, buf, count); 1522 1523 if (attr->protect) { 1524 if (retval != -ENODEV) 1525 psmouse_activate(psmouse); 1526 1527 if (parent) 1528 psmouse_activate(parent); 1529 } 1530 1531 out_unlock: 1532 mutex_unlock(&psmouse_mutex); 1533 out: 1534 return retval; 1535 } 1536 1537 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1538 { 1539 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1540 1541 return sprintf(buf, "%u\n", *field); 1542 } 1543 1544 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1545 { 1546 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1547 unsigned long value; 1548 1549 if (strict_strtoul(buf, 10, &value)) 1550 return -EINVAL; 1551 1552 if ((unsigned int)value != value) 1553 return -EINVAL; 1554 1555 *field = value; 1556 1557 return count; 1558 } 1559 1560 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1561 { 1562 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1563 } 1564 1565 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1566 { 1567 struct serio *serio = psmouse->ps2dev.serio; 1568 struct psmouse *parent = NULL; 1569 struct input_dev *old_dev, *new_dev; 1570 const struct psmouse_protocol *proto, *old_proto; 1571 int error; 1572 int retry = 0; 1573 1574 proto = psmouse_protocol_by_name(buf, count); 1575 if (!proto) 1576 return -EINVAL; 1577 1578 if (psmouse->type == proto->type) 1579 return count; 1580 1581 new_dev = input_allocate_device(); 1582 if (!new_dev) 1583 return -ENOMEM; 1584 1585 while (serio->child) { 1586 if (++retry > 3) { 1587 printk(KERN_WARNING 1588 "psmouse: failed to destroy child port, " 1589 "protocol change aborted.\n"); 1590 input_free_device(new_dev); 1591 return -EIO; 1592 } 1593 1594 mutex_unlock(&psmouse_mutex); 1595 serio_unregister_child_port(serio); 1596 mutex_lock(&psmouse_mutex); 1597 1598 if (serio->drv != &psmouse_drv) { 1599 input_free_device(new_dev); 1600 return -ENODEV; 1601 } 1602 1603 if (psmouse->type == proto->type) { 1604 input_free_device(new_dev); 1605 return count; /* switched by other thread */ 1606 } 1607 } 1608 1609 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1610 parent = serio_get_drvdata(serio->parent); 1611 if (parent->pt_deactivate) 1612 parent->pt_deactivate(parent); 1613 } 1614 1615 old_dev = psmouse->dev; 1616 old_proto = psmouse_protocol_by_type(psmouse->type); 1617 1618 if (psmouse->disconnect) 1619 psmouse->disconnect(psmouse); 1620 1621 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1622 1623 psmouse->dev = new_dev; 1624 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1625 1626 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1627 psmouse_reset(psmouse); 1628 /* default to PSMOUSE_PS2 */ 1629 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1630 } 1631 1632 psmouse_initialize(psmouse); 1633 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1634 1635 error = input_register_device(psmouse->dev); 1636 if (error) { 1637 if (psmouse->disconnect) 1638 psmouse->disconnect(psmouse); 1639 1640 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1641 input_free_device(new_dev); 1642 psmouse->dev = old_dev; 1643 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1644 psmouse_switch_protocol(psmouse, old_proto); 1645 psmouse_initialize(psmouse); 1646 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1647 1648 return error; 1649 } 1650 1651 input_unregister_device(old_dev); 1652 1653 if (parent && parent->pt_activate) 1654 parent->pt_activate(parent); 1655 1656 return count; 1657 } 1658 1659 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1660 { 1661 unsigned long value; 1662 1663 if (strict_strtoul(buf, 10, &value)) 1664 return -EINVAL; 1665 1666 psmouse->set_rate(psmouse, value); 1667 return count; 1668 } 1669 1670 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1671 { 1672 unsigned long value; 1673 1674 if (strict_strtoul(buf, 10, &value)) 1675 return -EINVAL; 1676 1677 psmouse->set_resolution(psmouse, value); 1678 return count; 1679 } 1680 1681 1682 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1683 { 1684 const struct psmouse_protocol *proto; 1685 1686 if (!val) 1687 return -EINVAL; 1688 1689 proto = psmouse_protocol_by_name(val, strlen(val)); 1690 1691 if (!proto || !proto->maxproto) 1692 return -EINVAL; 1693 1694 *((unsigned int *)kp->arg) = proto->type; 1695 1696 return 0; 1697 } 1698 1699 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1700 { 1701 int type = *((unsigned int *)kp->arg); 1702 1703 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1704 } 1705 1706 static int __init psmouse_init(void) 1707 { 1708 int err; 1709 1710 lifebook_module_init(); 1711 synaptics_module_init(); 1712 1713 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1714 if (!kpsmoused_wq) { 1715 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1716 return -ENOMEM; 1717 } 1718 1719 err = serio_register_driver(&psmouse_drv); 1720 if (err) 1721 destroy_workqueue(kpsmoused_wq); 1722 1723 return err; 1724 } 1725 1726 static void __exit psmouse_exit(void) 1727 { 1728 serio_unregister_driver(&psmouse_drv); 1729 destroy_workqueue(kpsmoused_wq); 1730 } 1731 1732 module_init(psmouse_init); 1733 module_exit(psmouse_exit); 1734