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/moduleparam.h> 17 #include <linux/slab.h> 18 #include <linux/interrupt.h> 19 #include <linux/input.h> 20 #include <linux/serio.h> 21 #include <linux/init.h> 22 #include <linux/libps2.h> 23 #include "psmouse.h" 24 #include "synaptics.h" 25 #include "logips2pp.h" 26 #include "alps.h" 27 #include "lifebook.h" 28 29 #define DRIVER_DESC "PS/2 mouse driver" 30 31 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 32 MODULE_DESCRIPTION(DRIVER_DESC); 33 MODULE_LICENSE("GPL"); 34 35 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 36 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 37 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 38 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 39 #define param_set_proto_abbrev psmouse_set_maxproto 40 #define param_get_proto_abbrev psmouse_get_maxproto 41 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 42 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 43 44 static unsigned int psmouse_resolution = 200; 45 module_param_named(resolution, psmouse_resolution, uint, 0644); 46 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 47 48 static unsigned int psmouse_rate = 100; 49 module_param_named(rate, psmouse_rate, uint, 0644); 50 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 51 52 static unsigned int psmouse_smartscroll = 1; 53 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 54 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 55 56 static unsigned int psmouse_resetafter; 57 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 58 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 59 60 PSMOUSE_DEFINE_ATTR(protocol); 61 PSMOUSE_DEFINE_ATTR(rate); 62 PSMOUSE_DEFINE_ATTR(resolution); 63 PSMOUSE_DEFINE_ATTR(resetafter); 64 65 __obsolete_setup("psmouse_noext"); 66 __obsolete_setup("psmouse_resolution="); 67 __obsolete_setup("psmouse_smartscroll="); 68 __obsolete_setup("psmouse_resetafter="); 69 __obsolete_setup("psmouse_rate="); 70 71 /* 72 * psmouse_sem protects all operations changing state of mouse 73 * (connecting, disconnecting, changing rate or resolution via 74 * sysfs). We could use a per-device semaphore but since there 75 * rarely more than one PS/2 mouse connected and since semaphore 76 * is taken in "slow" paths it is not worth it. 77 */ 78 static DECLARE_MUTEX(psmouse_sem); 79 80 struct psmouse_protocol { 81 enum psmouse_type type; 82 char *name; 83 char *alias; 84 int maxproto; 85 int (*detect)(struct psmouse *, int); 86 int (*init)(struct psmouse *); 87 }; 88 89 /* 90 * psmouse_process_byte() analyzes the PS/2 data stream and reports 91 * relevant events to the input module once full packet has arrived. 92 */ 93 94 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs) 95 { 96 struct input_dev *dev = &psmouse->dev; 97 unsigned char *packet = psmouse->packet; 98 99 if (psmouse->pktcnt < psmouse->pktsize) 100 return PSMOUSE_GOOD_DATA; 101 102 /* 103 * Full packet accumulated, process it 104 */ 105 106 input_regs(dev, regs); 107 108 /* 109 * Scroll wheel on IntelliMice, scroll buttons on NetMice 110 */ 111 112 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 113 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 114 115 /* 116 * Scroll wheel and buttons on IntelliMouse Explorer 117 */ 118 119 if (psmouse->type == PSMOUSE_IMEX) { 120 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 121 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 122 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 123 } 124 125 /* 126 * Extra buttons on Genius NewNet 3D 127 */ 128 129 if (psmouse->type == PSMOUSE_GENPS) { 130 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 131 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 132 } 133 134 /* 135 * Extra button on ThinkingMouse 136 */ 137 if (psmouse->type == PSMOUSE_THINKPS) { 138 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 139 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 140 packet[1] |= (packet[0] & 0x40) << 1; 141 } 142 143 /* 144 * Generic PS/2 Mouse 145 */ 146 147 input_report_key(dev, BTN_LEFT, packet[0] & 1); 148 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 149 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 150 151 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 152 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 153 154 input_sync(dev); 155 156 return PSMOUSE_FULL_PACKET; 157 } 158 159 /* 160 * psmouse_interrupt() handles incoming characters, either gathering them into 161 * packets or passing them to the command routine as command output. 162 */ 163 164 static irqreturn_t psmouse_interrupt(struct serio *serio, 165 unsigned char data, unsigned int flags, struct pt_regs *regs) 166 { 167 struct psmouse *psmouse = serio_get_drvdata(serio); 168 psmouse_ret_t rc; 169 170 if (psmouse->state == PSMOUSE_IGNORE) 171 goto out; 172 173 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 174 if (psmouse->state == PSMOUSE_ACTIVATED) 175 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 176 flags & SERIO_TIMEOUT ? " timeout" : "", 177 flags & SERIO_PARITY ? " bad parity" : ""); 178 ps2_cmd_aborted(&psmouse->ps2dev); 179 goto out; 180 } 181 182 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 183 if (ps2_handle_ack(&psmouse->ps2dev, data)) 184 goto out; 185 186 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 187 if (ps2_handle_response(&psmouse->ps2dev, data)) 188 goto out; 189 190 if (psmouse->state == PSMOUSE_INITIALIZING) 191 goto out; 192 193 if (psmouse->state == PSMOUSE_ACTIVATED && 194 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 195 printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 196 psmouse->name, psmouse->phys, psmouse->pktcnt); 197 psmouse->pktcnt = 0; 198 } 199 200 psmouse->last = jiffies; 201 psmouse->packet[psmouse->pktcnt++] = data; 202 203 if (psmouse->packet[0] == PSMOUSE_RET_BAT) { 204 if (psmouse->pktcnt == 1) 205 goto out; 206 207 if (psmouse->pktcnt == 2) { 208 if (psmouse->packet[1] == PSMOUSE_RET_ID) { 209 psmouse->state = PSMOUSE_IGNORE; 210 serio_reconnect(serio); 211 goto out; 212 } 213 if (psmouse->type == PSMOUSE_SYNAPTICS) { 214 /* neither 0xAA nor 0x00 are valid first bytes 215 * for a packet in absolute mode 216 */ 217 psmouse->pktcnt = 0; 218 goto out; 219 } 220 } 221 } 222 223 rc = psmouse->protocol_handler(psmouse, regs); 224 225 switch (rc) { 226 case PSMOUSE_BAD_DATA: 227 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 228 psmouse->name, psmouse->phys, psmouse->pktcnt); 229 psmouse->pktcnt = 0; 230 231 if (++psmouse->out_of_sync == psmouse->resetafter) { 232 psmouse->state = PSMOUSE_IGNORE; 233 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 234 serio_reconnect(psmouse->ps2dev.serio); 235 } 236 break; 237 238 case PSMOUSE_FULL_PACKET: 239 psmouse->pktcnt = 0; 240 if (psmouse->out_of_sync) { 241 psmouse->out_of_sync = 0; 242 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 243 psmouse->name, psmouse->phys); 244 } 245 break; 246 247 case PSMOUSE_GOOD_DATA: 248 break; 249 } 250 out: 251 return IRQ_HANDLED; 252 } 253 254 255 /* 256 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 257 * using sliced syntax, understood by advanced devices, such as Logitech 258 * or Synaptics touchpads. The command is encoded as: 259 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 260 * is the command. 261 */ 262 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 263 { 264 int i; 265 266 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 267 return -1; 268 269 for (i = 6; i >= 0; i -= 2) { 270 unsigned char d = (command >> i) & 3; 271 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 272 return -1; 273 } 274 275 return 0; 276 } 277 278 279 /* 280 * psmouse_reset() resets the mouse into power-on state. 281 */ 282 int psmouse_reset(struct psmouse *psmouse) 283 { 284 unsigned char param[2]; 285 286 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 287 return -1; 288 289 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 290 return -1; 291 292 return 0; 293 } 294 295 296 /* 297 * Genius NetMouse magic init. 298 */ 299 static int genius_detect(struct psmouse *psmouse, int set_properties) 300 { 301 struct ps2dev *ps2dev = &psmouse->ps2dev; 302 unsigned char param[4]; 303 304 param[0] = 3; 305 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 306 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 307 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 308 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 309 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 310 311 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 312 return -1; 313 314 if (set_properties) { 315 set_bit(BTN_EXTRA, psmouse->dev.keybit); 316 set_bit(BTN_SIDE, psmouse->dev.keybit); 317 set_bit(REL_WHEEL, psmouse->dev.relbit); 318 319 psmouse->vendor = "Genius"; 320 psmouse->name = "Wheel Mouse"; 321 psmouse->pktsize = 4; 322 } 323 324 return 0; 325 } 326 327 /* 328 * IntelliMouse magic init. 329 */ 330 static int intellimouse_detect(struct psmouse *psmouse, int set_properties) 331 { 332 struct ps2dev *ps2dev = &psmouse->ps2dev; 333 unsigned char param[2]; 334 335 param[0] = 200; 336 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 337 param[0] = 100; 338 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 339 param[0] = 80; 340 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 341 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 342 343 if (param[0] != 3) 344 return -1; 345 346 if (set_properties) { 347 set_bit(BTN_MIDDLE, psmouse->dev.keybit); 348 set_bit(REL_WHEEL, psmouse->dev.relbit); 349 350 if (!psmouse->vendor) psmouse->vendor = "Generic"; 351 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 352 psmouse->pktsize = 4; 353 } 354 355 return 0; 356 } 357 358 /* 359 * Try IntelliMouse/Explorer magic init. 360 */ 361 static int im_explorer_detect(struct psmouse *psmouse, int set_properties) 362 { 363 struct ps2dev *ps2dev = &psmouse->ps2dev; 364 unsigned char param[2]; 365 366 intellimouse_detect(psmouse, 0); 367 368 param[0] = 200; 369 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 370 param[0] = 200; 371 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 372 param[0] = 80; 373 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 374 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 375 376 if (param[0] != 4) 377 return -1; 378 379 if (set_properties) { 380 set_bit(BTN_MIDDLE, psmouse->dev.keybit); 381 set_bit(REL_WHEEL, psmouse->dev.relbit); 382 set_bit(BTN_SIDE, psmouse->dev.keybit); 383 set_bit(BTN_EXTRA, psmouse->dev.keybit); 384 385 if (!psmouse->vendor) psmouse->vendor = "Generic"; 386 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 387 psmouse->pktsize = 4; 388 } 389 390 return 0; 391 } 392 393 /* 394 * Kensington ThinkingMouse / ExpertMouse magic init. 395 */ 396 static int thinking_detect(struct psmouse *psmouse, int set_properties) 397 { 398 struct ps2dev *ps2dev = &psmouse->ps2dev; 399 unsigned char param[2]; 400 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 }; 401 int i; 402 403 param[0] = 10; 404 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 405 param[0] = 0; 406 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 407 for (i = 0; seq[i]; i++) 408 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE); 409 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 410 411 if (param[0] != 2) 412 return -1; 413 414 if (set_properties) { 415 set_bit(BTN_EXTRA, psmouse->dev.keybit); 416 417 psmouse->vendor = "Kensington"; 418 psmouse->name = "ThinkingMouse"; 419 } 420 421 return 0; 422 } 423 424 /* 425 * Bare PS/2 protocol "detection". Always succeeds. 426 */ 427 static int ps2bare_detect(struct psmouse *psmouse, int set_properties) 428 { 429 if (set_properties) { 430 if (!psmouse->vendor) psmouse->vendor = "Generic"; 431 if (!psmouse->name) psmouse->name = "Mouse"; 432 } 433 434 return 0; 435 } 436 437 438 /* 439 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 440 * the mouse may have. 441 */ 442 443 static int psmouse_extensions(struct psmouse *psmouse, 444 unsigned int max_proto, int set_properties) 445 { 446 int synaptics_hardware = 0; 447 448 /* 449 * We always check for lifebook because it does not disturb mouse 450 * (it only checks DMI information). 451 */ 452 if (lifebook_detect(psmouse, set_properties) == 0) { 453 if (max_proto > PSMOUSE_IMEX) { 454 if (!set_properties || lifebook_init(psmouse) == 0) 455 return PSMOUSE_LIFEBOOK; 456 } 457 } 458 459 /* 460 * Try Kensington ThinkingMouse (we try first, because synaptics probe 461 * upsets the thinkingmouse). 462 */ 463 464 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 465 return PSMOUSE_THINKPS; 466 467 /* 468 * Try Synaptics TouchPad 469 */ 470 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 471 synaptics_hardware = 1; 472 473 if (max_proto > PSMOUSE_IMEX) { 474 if (!set_properties || synaptics_init(psmouse) == 0) 475 return PSMOUSE_SYNAPTICS; 476 /* 477 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 478 * Unfortunately Logitech/Genius probes confuse some firmware versions so 479 * we'll have to skip them. 480 */ 481 max_proto = PSMOUSE_IMEX; 482 } 483 /* 484 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 485 */ 486 synaptics_reset(psmouse); 487 } 488 489 /* 490 * Try ALPS TouchPad 491 */ 492 if (max_proto > PSMOUSE_IMEX) { 493 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 494 if (alps_detect(psmouse, set_properties) == 0) { 495 if (!set_properties || alps_init(psmouse) == 0) 496 return PSMOUSE_ALPS; 497 /* 498 * Init failed, try basic relative protocols 499 */ 500 max_proto = PSMOUSE_IMEX; 501 } 502 } 503 504 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0) 505 return PSMOUSE_GENPS; 506 507 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0) 508 return PSMOUSE_PS2PP; 509 510 /* 511 * Reset to defaults in case the device got confused by extended 512 * protocol probes. 513 */ 514 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 515 516 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 517 return PSMOUSE_IMEX; 518 519 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 520 return PSMOUSE_IMPS; 521 522 /* 523 * Okay, all failed, we have a standard mouse here. The number of the buttons 524 * is still a question, though. We assume 3. 525 */ 526 ps2bare_detect(psmouse, set_properties); 527 528 if (synaptics_hardware) { 529 /* 530 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 531 * We need to reset the touchpad because if there is a track point on the 532 * pass through port it could get disabled while probing for protocol 533 * extensions. 534 */ 535 psmouse_reset(psmouse); 536 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 537 } 538 539 return PSMOUSE_PS2; 540 } 541 542 static struct psmouse_protocol psmouse_protocols[] = { 543 { 544 .type = PSMOUSE_PS2, 545 .name = "PS/2", 546 .alias = "bare", 547 .maxproto = 1, 548 .detect = ps2bare_detect, 549 }, 550 { 551 .type = PSMOUSE_PS2PP, 552 .name = "PS2++", 553 .alias = "logitech", 554 .detect = ps2pp_init, 555 }, 556 { 557 .type = PSMOUSE_THINKPS, 558 .name = "ThinkPS/2", 559 .alias = "thinkps", 560 .detect = thinking_detect, 561 }, 562 { 563 .type = PSMOUSE_GENPS, 564 .name = "GenPS/2", 565 .alias = "genius", 566 .detect = genius_detect, 567 }, 568 { 569 .type = PSMOUSE_IMPS, 570 .name = "ImPS/2", 571 .alias = "imps", 572 .maxproto = 1, 573 .detect = intellimouse_detect, 574 }, 575 { 576 .type = PSMOUSE_IMEX, 577 .name = "ImExPS/2", 578 .alias = "exps", 579 .maxproto = 1, 580 .detect = im_explorer_detect, 581 }, 582 { 583 .type = PSMOUSE_SYNAPTICS, 584 .name = "SynPS/2", 585 .alias = "synaptics", 586 .detect = synaptics_detect, 587 .init = synaptics_init, 588 }, 589 { 590 .type = PSMOUSE_ALPS, 591 .name = "AlpsPS/2", 592 .alias = "alps", 593 .detect = alps_detect, 594 .init = alps_init, 595 }, 596 { 597 .type = PSMOUSE_LIFEBOOK, 598 .name = "LBPS/2", 599 .alias = "lifebook", 600 .init = lifebook_init, 601 }, 602 { 603 .type = PSMOUSE_AUTO, 604 .name = "auto", 605 .alias = "any", 606 .maxproto = 1, 607 }, 608 }; 609 610 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 611 { 612 int i; 613 614 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 615 if (psmouse_protocols[i].type == type) 616 return &psmouse_protocols[i]; 617 618 WARN_ON(1); 619 return &psmouse_protocols[0]; 620 } 621 622 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 623 { 624 struct psmouse_protocol *p; 625 int i; 626 627 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 628 p = &psmouse_protocols[i]; 629 630 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 631 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 632 return &psmouse_protocols[i]; 633 } 634 635 return NULL; 636 } 637 638 639 /* 640 * psmouse_probe() probes for a PS/2 mouse. 641 */ 642 643 static int psmouse_probe(struct psmouse *psmouse) 644 { 645 struct ps2dev *ps2dev = &psmouse->ps2dev; 646 unsigned char param[2]; 647 648 /* 649 * First, we check if it's a mouse. It should send 0x00 or 0x03 650 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 651 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 652 * ID queries, probably due to a firmware bug. 653 */ 654 655 param[0] = 0xa5; 656 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 657 return -1; 658 659 if (param[0] != 0x00 && param[0] != 0x03 && 660 param[0] != 0x04 && param[0] != 0xff) 661 return -1; 662 663 /* 664 * Then we reset and disable the mouse so that it doesn't generate events. 665 */ 666 667 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 668 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 669 670 return 0; 671 } 672 673 /* 674 * Here we set the mouse resolution. 675 */ 676 677 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 678 { 679 unsigned char params[] = { 0, 1, 2, 2, 3 }; 680 681 if (resolution == 0 || resolution > 200) 682 resolution = 200; 683 684 ps2_command(&psmouse->ps2dev, ¶ms[resolution / 50], PSMOUSE_CMD_SETRES); 685 psmouse->resolution = 25 << params[resolution / 50]; 686 } 687 688 /* 689 * Here we set the mouse report rate. 690 */ 691 692 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 693 { 694 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 695 int i = 0; 696 697 while (rates[i] > rate) i++; 698 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE); 699 psmouse->rate = rates[i]; 700 } 701 702 /* 703 * psmouse_initialize() initializes the mouse to a sane state. 704 */ 705 706 static void psmouse_initialize(struct psmouse *psmouse) 707 { 708 /* 709 * We set the mouse into streaming mode. 710 */ 711 712 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM); 713 714 /* 715 * We set the mouse report rate, resolution and scaling. 716 */ 717 718 if (psmouse_max_proto != PSMOUSE_PS2) { 719 psmouse->set_rate(psmouse, psmouse->rate); 720 psmouse->set_resolution(psmouse, psmouse->resolution); 721 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 722 } 723 } 724 725 /* 726 * psmouse_set_state() sets new psmouse state and resets all flags and 727 * counters while holding serio lock so fighting with interrupt handler 728 * is not a concern. 729 */ 730 731 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 732 { 733 serio_pause_rx(psmouse->ps2dev.serio); 734 psmouse->state = new_state; 735 psmouse->pktcnt = psmouse->out_of_sync = 0; 736 psmouse->ps2dev.flags = 0; 737 serio_continue_rx(psmouse->ps2dev.serio); 738 } 739 740 /* 741 * psmouse_activate() enables the mouse so that we get motion reports from it. 742 */ 743 744 static void psmouse_activate(struct psmouse *psmouse) 745 { 746 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 747 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 748 psmouse->ps2dev.serio->phys); 749 750 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 751 } 752 753 754 /* 755 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 756 * reports from it unless we explicitely request it. 757 */ 758 759 static void psmouse_deactivate(struct psmouse *psmouse) 760 { 761 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 762 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 763 psmouse->ps2dev.serio->phys); 764 765 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 766 } 767 768 769 /* 770 * psmouse_cleanup() resets the mouse into power-on state. 771 */ 772 773 static void psmouse_cleanup(struct serio *serio) 774 { 775 struct psmouse *psmouse = serio_get_drvdata(serio); 776 777 psmouse_reset(psmouse); 778 } 779 780 /* 781 * psmouse_disconnect() closes and frees. 782 */ 783 784 static void psmouse_disconnect(struct serio *serio) 785 { 786 struct psmouse *psmouse, *parent = NULL; 787 788 psmouse = serio_get_drvdata(serio); 789 790 device_remove_file(&serio->dev, &psmouse_attr_protocol); 791 device_remove_file(&serio->dev, &psmouse_attr_rate); 792 device_remove_file(&serio->dev, &psmouse_attr_resolution); 793 device_remove_file(&serio->dev, &psmouse_attr_resetafter); 794 795 down(&psmouse_sem); 796 797 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 798 799 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 800 parent = serio_get_drvdata(serio->parent); 801 psmouse_deactivate(parent); 802 } 803 804 if (psmouse->disconnect) 805 psmouse->disconnect(psmouse); 806 807 if (parent && parent->pt_deactivate) 808 parent->pt_deactivate(parent); 809 810 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 811 812 input_unregister_device(&psmouse->dev); 813 serio_close(serio); 814 serio_set_drvdata(serio, NULL); 815 kfree(psmouse); 816 817 if (parent) 818 psmouse_activate(parent); 819 820 up(&psmouse_sem); 821 } 822 823 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto) 824 { 825 memset(&psmouse->dev, 0, sizeof(struct input_dev)); 826 827 init_input_dev(&psmouse->dev); 828 829 psmouse->dev.private = psmouse; 830 psmouse->dev.dev = &psmouse->ps2dev.serio->dev; 831 832 psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 833 psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 834 psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y); 835 836 psmouse->set_rate = psmouse_set_rate; 837 psmouse->set_resolution = psmouse_set_resolution; 838 psmouse->protocol_handler = psmouse_process_byte; 839 psmouse->pktsize = 3; 840 841 if (proto && (proto->detect || proto->init)) { 842 if (proto->detect && proto->detect(psmouse, 1) < 0) 843 return -1; 844 845 if (proto->init && proto->init(psmouse) < 0) 846 return -1; 847 848 psmouse->type = proto->type; 849 } 850 else 851 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); 852 853 sprintf(psmouse->devname, "%s %s %s", 854 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 855 856 psmouse->dev.name = psmouse->devname; 857 psmouse->dev.phys = psmouse->phys; 858 psmouse->dev.id.bustype = BUS_I8042; 859 psmouse->dev.id.vendor = 0x0002; 860 psmouse->dev.id.product = psmouse->type; 861 psmouse->dev.id.version = psmouse->model; 862 863 return 0; 864 } 865 866 /* 867 * psmouse_connect() is a callback from the serio module when 868 * an unhandled serio port is found. 869 */ 870 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 871 { 872 struct psmouse *psmouse, *parent = NULL; 873 int retval; 874 875 down(&psmouse_sem); 876 877 /* 878 * If this is a pass-through port deactivate parent so the device 879 * connected to this port can be successfully identified 880 */ 881 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 882 parent = serio_get_drvdata(serio->parent); 883 psmouse_deactivate(parent); 884 } 885 886 if (!(psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL))) { 887 retval = -ENOMEM; 888 goto out; 889 } 890 891 ps2_init(&psmouse->ps2dev, serio); 892 sprintf(psmouse->phys, "%s/input0", serio->phys); 893 894 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 895 896 serio_set_drvdata(serio, psmouse); 897 898 retval = serio_open(serio, drv); 899 if (retval) { 900 serio_set_drvdata(serio, NULL); 901 kfree(psmouse); 902 goto out; 903 } 904 905 if (psmouse_probe(psmouse) < 0) { 906 serio_close(serio); 907 serio_set_drvdata(serio, NULL); 908 kfree(psmouse); 909 retval = -ENODEV; 910 goto out; 911 } 912 913 psmouse->rate = psmouse_rate; 914 psmouse->resolution = psmouse_resolution; 915 psmouse->resetafter = psmouse_resetafter; 916 psmouse->smartscroll = psmouse_smartscroll; 917 918 psmouse_switch_protocol(psmouse, NULL); 919 920 input_register_device(&psmouse->dev); 921 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); 922 923 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 924 925 psmouse_initialize(psmouse); 926 927 if (parent && parent->pt_activate) 928 parent->pt_activate(parent); 929 930 device_create_file(&serio->dev, &psmouse_attr_protocol); 931 device_create_file(&serio->dev, &psmouse_attr_rate); 932 device_create_file(&serio->dev, &psmouse_attr_resolution); 933 device_create_file(&serio->dev, &psmouse_attr_resetafter); 934 935 psmouse_activate(psmouse); 936 937 retval = 0; 938 939 out: 940 /* If this is a pass-through port the parent needs to be re-activated */ 941 if (parent) 942 psmouse_activate(parent); 943 944 up(&psmouse_sem); 945 return retval; 946 } 947 948 949 static int psmouse_reconnect(struct serio *serio) 950 { 951 struct psmouse *psmouse = serio_get_drvdata(serio); 952 struct psmouse *parent = NULL; 953 struct serio_driver *drv = serio->drv; 954 int rc = -1; 955 956 if (!drv || !psmouse) { 957 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 958 return -1; 959 } 960 961 down(&psmouse_sem); 962 963 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 964 parent = serio_get_drvdata(serio->parent); 965 psmouse_deactivate(parent); 966 } 967 968 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 969 970 if (psmouse->reconnect) { 971 if (psmouse->reconnect(psmouse)) 972 goto out; 973 } else if (psmouse_probe(psmouse) < 0 || 974 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) 975 goto out; 976 977 /* ok, the device type (and capabilities) match the old one, 978 * we can continue using it, complete intialization 979 */ 980 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 981 982 psmouse_initialize(psmouse); 983 984 if (parent && parent->pt_activate) 985 parent->pt_activate(parent); 986 987 psmouse_activate(psmouse); 988 rc = 0; 989 990 out: 991 /* If this is a pass-through port the parent waits to be activated */ 992 if (parent) 993 psmouse_activate(parent); 994 995 up(&psmouse_sem); 996 return rc; 997 } 998 999 static struct serio_device_id psmouse_serio_ids[] = { 1000 { 1001 .type = SERIO_8042, 1002 .proto = SERIO_ANY, 1003 .id = SERIO_ANY, 1004 .extra = SERIO_ANY, 1005 }, 1006 { 1007 .type = SERIO_PS_PSTHRU, 1008 .proto = SERIO_ANY, 1009 .id = SERIO_ANY, 1010 .extra = SERIO_ANY, 1011 }, 1012 { 0 } 1013 }; 1014 1015 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1016 1017 static struct serio_driver psmouse_drv = { 1018 .driver = { 1019 .name = "psmouse", 1020 }, 1021 .description = DRIVER_DESC, 1022 .id_table = psmouse_serio_ids, 1023 .interrupt = psmouse_interrupt, 1024 .connect = psmouse_connect, 1025 .reconnect = psmouse_reconnect, 1026 .disconnect = psmouse_disconnect, 1027 .cleanup = psmouse_cleanup, 1028 }; 1029 1030 ssize_t psmouse_attr_show_helper(struct device *dev, char *buf, 1031 ssize_t (*handler)(struct psmouse *, char *)) 1032 { 1033 struct serio *serio = to_serio_port(dev); 1034 int retval; 1035 1036 retval = serio_pin_driver(serio); 1037 if (retval) 1038 return retval; 1039 1040 if (serio->drv != &psmouse_drv) { 1041 retval = -ENODEV; 1042 goto out; 1043 } 1044 1045 retval = handler(serio_get_drvdata(serio), buf); 1046 1047 out: 1048 serio_unpin_driver(serio); 1049 return retval; 1050 } 1051 1052 ssize_t psmouse_attr_set_helper(struct device *dev, const char *buf, size_t count, 1053 ssize_t (*handler)(struct psmouse *, const char *, size_t)) 1054 { 1055 struct serio *serio = to_serio_port(dev); 1056 struct psmouse *psmouse = serio_get_drvdata(serio); 1057 struct psmouse *parent = NULL; 1058 int retval; 1059 1060 retval = serio_pin_driver(serio); 1061 if (retval) 1062 return retval; 1063 1064 if (serio->drv != &psmouse_drv) { 1065 retval = -ENODEV; 1066 goto out_unpin; 1067 } 1068 1069 retval = down_interruptible(&psmouse_sem); 1070 if (retval) 1071 goto out_unpin; 1072 1073 if (psmouse->state == PSMOUSE_IGNORE) { 1074 retval = -ENODEV; 1075 goto out_up; 1076 } 1077 1078 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1079 parent = serio_get_drvdata(serio->parent); 1080 psmouse_deactivate(parent); 1081 } 1082 1083 psmouse_deactivate(psmouse); 1084 1085 retval = handler(psmouse, buf, count); 1086 1087 if (retval != -ENODEV) 1088 psmouse_activate(psmouse); 1089 1090 if (parent) 1091 psmouse_activate(parent); 1092 1093 out_up: 1094 up(&psmouse_sem); 1095 out_unpin: 1096 serio_unpin_driver(serio); 1097 return retval; 1098 } 1099 1100 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, char *buf) 1101 { 1102 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1103 } 1104 1105 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, const char *buf, size_t count) 1106 { 1107 struct serio *serio = psmouse->ps2dev.serio; 1108 struct psmouse *parent = NULL; 1109 struct psmouse_protocol *proto; 1110 int retry = 0; 1111 1112 if (!(proto = psmouse_protocol_by_name(buf, count))) 1113 return -EINVAL; 1114 1115 if (psmouse->type == proto->type) 1116 return count; 1117 1118 while (serio->child) { 1119 if (++retry > 3) { 1120 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); 1121 return -EIO; 1122 } 1123 1124 up(&psmouse_sem); 1125 serio_unpin_driver(serio); 1126 serio_unregister_child_port(serio); 1127 serio_pin_driver_uninterruptible(serio); 1128 down(&psmouse_sem); 1129 1130 if (serio->drv != &psmouse_drv) 1131 return -ENODEV; 1132 1133 if (psmouse->type == proto->type) 1134 return count; /* switched by other thread */ 1135 } 1136 1137 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1138 parent = serio_get_drvdata(serio->parent); 1139 if (parent->pt_deactivate) 1140 parent->pt_deactivate(parent); 1141 } 1142 1143 if (psmouse->disconnect) 1144 psmouse->disconnect(psmouse); 1145 1146 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1147 input_unregister_device(&psmouse->dev); 1148 1149 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1150 1151 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1152 psmouse_reset(psmouse); 1153 /* default to PSMOUSE_PS2 */ 1154 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1155 } 1156 1157 psmouse_initialize(psmouse); 1158 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1159 1160 input_register_device(&psmouse->dev); 1161 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); 1162 1163 if (parent && parent->pt_activate) 1164 parent->pt_activate(parent); 1165 1166 return count; 1167 } 1168 1169 static ssize_t psmouse_attr_show_rate(struct psmouse *psmouse, char *buf) 1170 { 1171 return sprintf(buf, "%d\n", psmouse->rate); 1172 } 1173 1174 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, const char *buf, size_t count) 1175 { 1176 unsigned long value; 1177 char *rest; 1178 1179 value = simple_strtoul(buf, &rest, 10); 1180 if (*rest) 1181 return -EINVAL; 1182 1183 psmouse->set_rate(psmouse, value); 1184 return count; 1185 } 1186 1187 static ssize_t psmouse_attr_show_resolution(struct psmouse *psmouse, char *buf) 1188 { 1189 return sprintf(buf, "%d\n", psmouse->resolution); 1190 } 1191 1192 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, const char *buf, size_t count) 1193 { 1194 unsigned long value; 1195 char *rest; 1196 1197 value = simple_strtoul(buf, &rest, 10); 1198 if (*rest) 1199 return -EINVAL; 1200 1201 psmouse->set_resolution(psmouse, value); 1202 return count; 1203 } 1204 1205 static ssize_t psmouse_attr_show_resetafter(struct psmouse *psmouse, char *buf) 1206 { 1207 return sprintf(buf, "%d\n", psmouse->resetafter); 1208 } 1209 1210 static ssize_t psmouse_attr_set_resetafter(struct psmouse *psmouse, const char *buf, size_t count) 1211 { 1212 unsigned long value; 1213 char *rest; 1214 1215 value = simple_strtoul(buf, &rest, 10); 1216 if (*rest) 1217 return -EINVAL; 1218 1219 psmouse->resetafter = value; 1220 return count; 1221 } 1222 1223 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1224 { 1225 struct psmouse_protocol *proto; 1226 1227 if (!val) 1228 return -EINVAL; 1229 1230 proto = psmouse_protocol_by_name(val, strlen(val)); 1231 1232 if (!proto || !proto->maxproto) 1233 return -EINVAL; 1234 1235 *((unsigned int *)kp->arg) = proto->type; 1236 1237 return 0; \ 1238 } 1239 1240 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1241 { 1242 int type = *((unsigned int *)kp->arg); 1243 1244 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1245 } 1246 1247 static int __init psmouse_init(void) 1248 { 1249 serio_register_driver(&psmouse_drv); 1250 return 0; 1251 } 1252 1253 static void __exit psmouse_exit(void) 1254 { 1255 serio_unregister_driver(&psmouse_drv); 1256 } 1257 1258 module_init(psmouse_init); 1259 module_exit(psmouse_exit); 1260