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(REL_WHEEL, psmouse->dev.relbit); 348 349 if (!psmouse->vendor) psmouse->vendor = "Generic"; 350 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 351 psmouse->pktsize = 4; 352 } 353 354 return 0; 355 } 356 357 /* 358 * Try IntelliMouse/Explorer magic init. 359 */ 360 static int im_explorer_detect(struct psmouse *psmouse, int set_properties) 361 { 362 struct ps2dev *ps2dev = &psmouse->ps2dev; 363 unsigned char param[2]; 364 365 intellimouse_detect(psmouse, 0); 366 367 param[0] = 200; 368 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 369 param[0] = 200; 370 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 371 param[0] = 80; 372 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 373 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 374 375 if (param[0] != 4) 376 return -1; 377 378 if (set_properties) { 379 set_bit(REL_WHEEL, psmouse->dev.relbit); 380 set_bit(BTN_SIDE, psmouse->dev.keybit); 381 set_bit(BTN_EXTRA, psmouse->dev.keybit); 382 383 if (!psmouse->vendor) psmouse->vendor = "Generic"; 384 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 385 psmouse->pktsize = 4; 386 } 387 388 return 0; 389 } 390 391 /* 392 * Kensington ThinkingMouse / ExpertMouse magic init. 393 */ 394 static int thinking_detect(struct psmouse *psmouse, int set_properties) 395 { 396 struct ps2dev *ps2dev = &psmouse->ps2dev; 397 unsigned char param[2]; 398 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 }; 399 int i; 400 401 param[0] = 10; 402 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 403 param[0] = 0; 404 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 405 for (i = 0; seq[i]; i++) 406 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE); 407 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 408 409 if (param[0] != 2) 410 return -1; 411 412 if (set_properties) { 413 set_bit(BTN_EXTRA, psmouse->dev.keybit); 414 415 psmouse->vendor = "Kensington"; 416 psmouse->name = "ThinkingMouse"; 417 } 418 419 return 0; 420 } 421 422 /* 423 * Bare PS/2 protocol "detection". Always succeeds. 424 */ 425 static int ps2bare_detect(struct psmouse *psmouse, int set_properties) 426 { 427 if (set_properties) { 428 if (!psmouse->vendor) psmouse->vendor = "Generic"; 429 if (!psmouse->name) psmouse->name = "Mouse"; 430 } 431 432 return 0; 433 } 434 435 436 /* 437 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 438 * the mouse may have. 439 */ 440 441 static int psmouse_extensions(struct psmouse *psmouse, 442 unsigned int max_proto, int set_properties) 443 { 444 int synaptics_hardware = 0; 445 446 /* 447 * We always check for lifebook because it does not disturb mouse 448 * (it only checks DMI information). 449 */ 450 if (lifebook_detect(psmouse, set_properties) == 0) { 451 if (max_proto > PSMOUSE_IMEX) { 452 if (!set_properties || lifebook_init(psmouse) == 0) 453 return PSMOUSE_LIFEBOOK; 454 } 455 } 456 457 /* 458 * Try Kensington ThinkingMouse (we try first, because synaptics probe 459 * upsets the thinkingmouse). 460 */ 461 462 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 463 return PSMOUSE_THINKPS; 464 465 /* 466 * Try Synaptics TouchPad 467 */ 468 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 469 synaptics_hardware = 1; 470 471 if (max_proto > PSMOUSE_IMEX) { 472 if (!set_properties || synaptics_init(psmouse) == 0) 473 return PSMOUSE_SYNAPTICS; 474 /* 475 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 476 * Unfortunately Logitech/Genius probes confuse some firmware versions so 477 * we'll have to skip them. 478 */ 479 max_proto = PSMOUSE_IMEX; 480 } 481 /* 482 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 483 */ 484 synaptics_reset(psmouse); 485 } 486 487 /* 488 * Try ALPS TouchPad 489 */ 490 if (max_proto > PSMOUSE_IMEX) { 491 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 492 if (alps_detect(psmouse, set_properties) == 0) { 493 if (!set_properties || alps_init(psmouse) == 0) 494 return PSMOUSE_ALPS; 495 /* 496 * Init failed, try basic relative protocols 497 */ 498 max_proto = PSMOUSE_IMEX; 499 } 500 } 501 502 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0) 503 return PSMOUSE_GENPS; 504 505 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0) 506 return PSMOUSE_PS2PP; 507 508 /* 509 * Reset to defaults in case the device got confused by extended 510 * protocol probes. 511 */ 512 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 513 514 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 515 return PSMOUSE_IMEX; 516 517 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 518 return PSMOUSE_IMPS; 519 520 /* 521 * Okay, all failed, we have a standard mouse here. The number of the buttons 522 * is still a question, though. We assume 3. 523 */ 524 ps2bare_detect(psmouse, set_properties); 525 526 if (synaptics_hardware) { 527 /* 528 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 529 * We need to reset the touchpad because if there is a track point on the 530 * pass through port it could get disabled while probing for protocol 531 * extensions. 532 */ 533 psmouse_reset(psmouse); 534 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 535 } 536 537 return PSMOUSE_PS2; 538 } 539 540 static struct psmouse_protocol psmouse_protocols[] = { 541 { 542 .type = PSMOUSE_PS2, 543 .name = "PS/2", 544 .alias = "bare", 545 .maxproto = 1, 546 .detect = ps2bare_detect, 547 }, 548 { 549 .type = PSMOUSE_PS2PP, 550 .name = "PS2++", 551 .alias = "logitech", 552 .detect = ps2pp_init, 553 }, 554 { 555 .type = PSMOUSE_THINKPS, 556 .name = "ThinkPS/2", 557 .alias = "thinkps", 558 .detect = thinking_detect, 559 }, 560 { 561 .type = PSMOUSE_GENPS, 562 .name = "GenPS/2", 563 .alias = "genius", 564 .detect = genius_detect, 565 }, 566 { 567 .type = PSMOUSE_IMPS, 568 .name = "ImPS/2", 569 .alias = "imps", 570 .maxproto = 1, 571 .detect = intellimouse_detect, 572 }, 573 { 574 .type = PSMOUSE_IMEX, 575 .name = "ImExPS/2", 576 .alias = "exps", 577 .maxproto = 1, 578 .detect = im_explorer_detect, 579 }, 580 { 581 .type = PSMOUSE_SYNAPTICS, 582 .name = "SynPS/2", 583 .alias = "synaptics", 584 .detect = synaptics_detect, 585 .init = synaptics_init, 586 }, 587 { 588 .type = PSMOUSE_ALPS, 589 .name = "AlpsPS/2", 590 .alias = "alps", 591 .detect = alps_detect, 592 .init = alps_init, 593 }, 594 { 595 .type = PSMOUSE_LIFEBOOK, 596 .name = "LBPS/2", 597 .alias = "lifebook", 598 .init = lifebook_init, 599 }, 600 { 601 .type = PSMOUSE_AUTO, 602 .name = "auto", 603 .alias = "any", 604 .maxproto = 1, 605 }, 606 }; 607 608 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 609 { 610 int i; 611 612 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 613 if (psmouse_protocols[i].type == type) 614 return &psmouse_protocols[i]; 615 616 WARN_ON(1); 617 return &psmouse_protocols[0]; 618 } 619 620 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 621 { 622 struct psmouse_protocol *p; 623 int i; 624 625 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 626 p = &psmouse_protocols[i]; 627 628 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 629 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 630 return &psmouse_protocols[i]; 631 } 632 633 return NULL; 634 } 635 636 637 /* 638 * psmouse_probe() probes for a PS/2 mouse. 639 */ 640 641 static int psmouse_probe(struct psmouse *psmouse) 642 { 643 struct ps2dev *ps2dev = &psmouse->ps2dev; 644 unsigned char param[2]; 645 646 /* 647 * First, we check if it's a mouse. It should send 0x00 or 0x03 648 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 649 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 650 * ID queries, probably due to a firmware bug. 651 */ 652 653 param[0] = 0xa5; 654 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 655 return -1; 656 657 if (param[0] != 0x00 && param[0] != 0x03 && 658 param[0] != 0x04 && param[0] != 0xff) 659 return -1; 660 661 /* 662 * Then we reset and disable the mouse so that it doesn't generate events. 663 */ 664 665 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 666 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 667 668 return 0; 669 } 670 671 /* 672 * Here we set the mouse resolution. 673 */ 674 675 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 676 { 677 unsigned char params[] = { 0, 1, 2, 2, 3 }; 678 679 if (resolution == 0 || resolution > 200) 680 resolution = 200; 681 682 ps2_command(&psmouse->ps2dev, ¶ms[resolution / 50], PSMOUSE_CMD_SETRES); 683 psmouse->resolution = 25 << params[resolution / 50]; 684 } 685 686 /* 687 * Here we set the mouse report rate. 688 */ 689 690 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 691 { 692 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 693 int i = 0; 694 695 while (rates[i] > rate) i++; 696 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE); 697 psmouse->rate = rates[i]; 698 } 699 700 /* 701 * psmouse_initialize() initializes the mouse to a sane state. 702 */ 703 704 static void psmouse_initialize(struct psmouse *psmouse) 705 { 706 /* 707 * We set the mouse into streaming mode. 708 */ 709 710 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM); 711 712 /* 713 * We set the mouse report rate, resolution and scaling. 714 */ 715 716 if (psmouse_max_proto != PSMOUSE_PS2) { 717 psmouse->set_rate(psmouse, psmouse->rate); 718 psmouse->set_resolution(psmouse, psmouse->resolution); 719 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 720 } 721 } 722 723 /* 724 * psmouse_set_state() sets new psmouse state and resets all flags and 725 * counters while holding serio lock so fighting with interrupt handler 726 * is not a concern. 727 */ 728 729 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 730 { 731 serio_pause_rx(psmouse->ps2dev.serio); 732 psmouse->state = new_state; 733 psmouse->pktcnt = psmouse->out_of_sync = 0; 734 psmouse->ps2dev.flags = 0; 735 serio_continue_rx(psmouse->ps2dev.serio); 736 } 737 738 /* 739 * psmouse_activate() enables the mouse so that we get motion reports from it. 740 */ 741 742 static void psmouse_activate(struct psmouse *psmouse) 743 { 744 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 745 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 746 psmouse->ps2dev.serio->phys); 747 748 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 749 } 750 751 752 /* 753 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 754 * reports from it unless we explicitely request it. 755 */ 756 757 static void psmouse_deactivate(struct psmouse *psmouse) 758 { 759 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 760 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 761 psmouse->ps2dev.serio->phys); 762 763 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 764 } 765 766 767 /* 768 * psmouse_cleanup() resets the mouse into power-on state. 769 */ 770 771 static void psmouse_cleanup(struct serio *serio) 772 { 773 struct psmouse *psmouse = serio_get_drvdata(serio); 774 775 psmouse_reset(psmouse); 776 } 777 778 /* 779 * psmouse_disconnect() closes and frees. 780 */ 781 782 static void psmouse_disconnect(struct serio *serio) 783 { 784 struct psmouse *psmouse, *parent = NULL; 785 786 psmouse = serio_get_drvdata(serio); 787 788 device_remove_file(&serio->dev, &psmouse_attr_protocol); 789 device_remove_file(&serio->dev, &psmouse_attr_rate); 790 device_remove_file(&serio->dev, &psmouse_attr_resolution); 791 device_remove_file(&serio->dev, &psmouse_attr_resetafter); 792 793 down(&psmouse_sem); 794 795 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 796 797 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 798 parent = serio_get_drvdata(serio->parent); 799 psmouse_deactivate(parent); 800 } 801 802 if (psmouse->disconnect) 803 psmouse->disconnect(psmouse); 804 805 if (parent && parent->pt_deactivate) 806 parent->pt_deactivate(parent); 807 808 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 809 810 input_unregister_device(&psmouse->dev); 811 serio_close(serio); 812 serio_set_drvdata(serio, NULL); 813 kfree(psmouse); 814 815 if (parent) 816 psmouse_activate(parent); 817 818 up(&psmouse_sem); 819 } 820 821 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto) 822 { 823 memset(&psmouse->dev, 0, sizeof(struct input_dev)); 824 825 init_input_dev(&psmouse->dev); 826 827 psmouse->dev.private = psmouse; 828 psmouse->dev.dev = &psmouse->ps2dev.serio->dev; 829 830 psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 831 psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 832 psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y); 833 834 psmouse->set_rate = psmouse_set_rate; 835 psmouse->set_resolution = psmouse_set_resolution; 836 psmouse->protocol_handler = psmouse_process_byte; 837 psmouse->pktsize = 3; 838 839 if (proto && (proto->detect || proto->init)) { 840 if (proto->detect && proto->detect(psmouse, 1) < 0) 841 return -1; 842 843 if (proto->init && proto->init(psmouse) < 0) 844 return -1; 845 846 psmouse->type = proto->type; 847 } 848 else 849 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); 850 851 sprintf(psmouse->devname, "%s %s %s", 852 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 853 854 psmouse->dev.name = psmouse->devname; 855 psmouse->dev.phys = psmouse->phys; 856 psmouse->dev.id.bustype = BUS_I8042; 857 psmouse->dev.id.vendor = 0x0002; 858 psmouse->dev.id.product = psmouse->type; 859 psmouse->dev.id.version = psmouse->model; 860 861 return 0; 862 } 863 864 /* 865 * psmouse_connect() is a callback from the serio module when 866 * an unhandled serio port is found. 867 */ 868 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 869 { 870 struct psmouse *psmouse, *parent = NULL; 871 int retval; 872 873 down(&psmouse_sem); 874 875 /* 876 * If this is a pass-through port deactivate parent so the device 877 * connected to this port can be successfully identified 878 */ 879 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 880 parent = serio_get_drvdata(serio->parent); 881 psmouse_deactivate(parent); 882 } 883 884 if (!(psmouse = kcalloc(1, sizeof(struct psmouse), GFP_KERNEL))) { 885 retval = -ENOMEM; 886 goto out; 887 } 888 889 ps2_init(&psmouse->ps2dev, serio); 890 sprintf(psmouse->phys, "%s/input0", serio->phys); 891 892 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 893 894 serio_set_drvdata(serio, psmouse); 895 896 retval = serio_open(serio, drv); 897 if (retval) { 898 serio_set_drvdata(serio, NULL); 899 kfree(psmouse); 900 goto out; 901 } 902 903 if (psmouse_probe(psmouse) < 0) { 904 serio_close(serio); 905 serio_set_drvdata(serio, NULL); 906 kfree(psmouse); 907 retval = -ENODEV; 908 goto out; 909 } 910 911 psmouse->rate = psmouse_rate; 912 psmouse->resolution = psmouse_resolution; 913 psmouse->resetafter = psmouse_resetafter; 914 psmouse->smartscroll = psmouse_smartscroll; 915 916 psmouse_switch_protocol(psmouse, NULL); 917 918 input_register_device(&psmouse->dev); 919 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); 920 921 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 922 923 psmouse_initialize(psmouse); 924 925 if (parent && parent->pt_activate) 926 parent->pt_activate(parent); 927 928 device_create_file(&serio->dev, &psmouse_attr_protocol); 929 device_create_file(&serio->dev, &psmouse_attr_rate); 930 device_create_file(&serio->dev, &psmouse_attr_resolution); 931 device_create_file(&serio->dev, &psmouse_attr_resetafter); 932 933 psmouse_activate(psmouse); 934 935 retval = 0; 936 937 out: 938 /* If this is a pass-through port the parent needs to be re-activated */ 939 if (parent) 940 psmouse_activate(parent); 941 942 up(&psmouse_sem); 943 return retval; 944 } 945 946 947 static int psmouse_reconnect(struct serio *serio) 948 { 949 struct psmouse *psmouse = serio_get_drvdata(serio); 950 struct psmouse *parent = NULL; 951 struct serio_driver *drv = serio->drv; 952 int rc = -1; 953 954 if (!drv || !psmouse) { 955 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 956 return -1; 957 } 958 959 down(&psmouse_sem); 960 961 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 962 parent = serio_get_drvdata(serio->parent); 963 psmouse_deactivate(parent); 964 } 965 966 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 967 968 if (psmouse->reconnect) { 969 if (psmouse->reconnect(psmouse)) 970 goto out; 971 } else if (psmouse_probe(psmouse) < 0 || 972 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) 973 goto out; 974 975 /* ok, the device type (and capabilities) match the old one, 976 * we can continue using it, complete intialization 977 */ 978 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 979 980 psmouse_initialize(psmouse); 981 982 if (parent && parent->pt_activate) 983 parent->pt_activate(parent); 984 985 psmouse_activate(psmouse); 986 rc = 0; 987 988 out: 989 /* If this is a pass-through port the parent waits to be activated */ 990 if (parent) 991 psmouse_activate(parent); 992 993 up(&psmouse_sem); 994 return rc; 995 } 996 997 static struct serio_device_id psmouse_serio_ids[] = { 998 { 999 .type = SERIO_8042, 1000 .proto = SERIO_ANY, 1001 .id = SERIO_ANY, 1002 .extra = SERIO_ANY, 1003 }, 1004 { 1005 .type = SERIO_PS_PSTHRU, 1006 .proto = SERIO_ANY, 1007 .id = SERIO_ANY, 1008 .extra = SERIO_ANY, 1009 }, 1010 { 0 } 1011 }; 1012 1013 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1014 1015 static struct serio_driver psmouse_drv = { 1016 .driver = { 1017 .name = "psmouse", 1018 }, 1019 .description = DRIVER_DESC, 1020 .id_table = psmouse_serio_ids, 1021 .interrupt = psmouse_interrupt, 1022 .connect = psmouse_connect, 1023 .reconnect = psmouse_reconnect, 1024 .disconnect = psmouse_disconnect, 1025 .cleanup = psmouse_cleanup, 1026 }; 1027 1028 ssize_t psmouse_attr_show_helper(struct device *dev, char *buf, 1029 ssize_t (*handler)(struct psmouse *, char *)) 1030 { 1031 struct serio *serio = to_serio_port(dev); 1032 int retval; 1033 1034 retval = serio_pin_driver(serio); 1035 if (retval) 1036 return retval; 1037 1038 if (serio->drv != &psmouse_drv) { 1039 retval = -ENODEV; 1040 goto out; 1041 } 1042 1043 retval = handler(serio_get_drvdata(serio), buf); 1044 1045 out: 1046 serio_unpin_driver(serio); 1047 return retval; 1048 } 1049 1050 ssize_t psmouse_attr_set_helper(struct device *dev, const char *buf, size_t count, 1051 ssize_t (*handler)(struct psmouse *, const char *, size_t)) 1052 { 1053 struct serio *serio = to_serio_port(dev); 1054 struct psmouse *psmouse = serio_get_drvdata(serio); 1055 struct psmouse *parent = NULL; 1056 int retval; 1057 1058 retval = serio_pin_driver(serio); 1059 if (retval) 1060 return retval; 1061 1062 if (serio->drv != &psmouse_drv) { 1063 retval = -ENODEV; 1064 goto out_unpin; 1065 } 1066 1067 retval = down_interruptible(&psmouse_sem); 1068 if (retval) 1069 goto out_unpin; 1070 1071 if (psmouse->state == PSMOUSE_IGNORE) { 1072 retval = -ENODEV; 1073 goto out_up; 1074 } 1075 1076 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1077 parent = serio_get_drvdata(serio->parent); 1078 psmouse_deactivate(parent); 1079 } 1080 1081 psmouse_deactivate(psmouse); 1082 1083 retval = handler(psmouse, buf, count); 1084 1085 if (retval != -ENODEV) 1086 psmouse_activate(psmouse); 1087 1088 if (parent) 1089 psmouse_activate(parent); 1090 1091 out_up: 1092 up(&psmouse_sem); 1093 out_unpin: 1094 serio_unpin_driver(serio); 1095 return retval; 1096 } 1097 1098 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, char *buf) 1099 { 1100 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1101 } 1102 1103 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, const char *buf, size_t count) 1104 { 1105 struct serio *serio = psmouse->ps2dev.serio; 1106 struct psmouse *parent = NULL; 1107 struct psmouse_protocol *proto; 1108 int retry = 0; 1109 1110 if (!(proto = psmouse_protocol_by_name(buf, count))) 1111 return -EINVAL; 1112 1113 if (psmouse->type == proto->type) 1114 return count; 1115 1116 while (serio->child) { 1117 if (++retry > 3) { 1118 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); 1119 return -EIO; 1120 } 1121 1122 up(&psmouse_sem); 1123 serio_unpin_driver(serio); 1124 serio_unregister_child_port(serio); 1125 serio_pin_driver_uninterruptible(serio); 1126 down(&psmouse_sem); 1127 1128 if (serio->drv != &psmouse_drv) 1129 return -ENODEV; 1130 1131 if (psmouse->type == proto->type) 1132 return count; /* switched by other thread */ 1133 } 1134 1135 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1136 parent = serio_get_drvdata(serio->parent); 1137 if (parent->pt_deactivate) 1138 parent->pt_deactivate(parent); 1139 } 1140 1141 if (psmouse->disconnect) 1142 psmouse->disconnect(psmouse); 1143 1144 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1145 input_unregister_device(&psmouse->dev); 1146 1147 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1148 1149 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1150 psmouse_reset(psmouse); 1151 /* default to PSMOUSE_PS2 */ 1152 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1153 } 1154 1155 psmouse_initialize(psmouse); 1156 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1157 1158 input_register_device(&psmouse->dev); 1159 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); 1160 1161 if (parent && parent->pt_activate) 1162 parent->pt_activate(parent); 1163 1164 return count; 1165 } 1166 1167 static ssize_t psmouse_attr_show_rate(struct psmouse *psmouse, char *buf) 1168 { 1169 return sprintf(buf, "%d\n", psmouse->rate); 1170 } 1171 1172 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, const char *buf, size_t count) 1173 { 1174 unsigned long value; 1175 char *rest; 1176 1177 value = simple_strtoul(buf, &rest, 10); 1178 if (*rest) 1179 return -EINVAL; 1180 1181 psmouse->set_rate(psmouse, value); 1182 return count; 1183 } 1184 1185 static ssize_t psmouse_attr_show_resolution(struct psmouse *psmouse, char *buf) 1186 { 1187 return sprintf(buf, "%d\n", psmouse->resolution); 1188 } 1189 1190 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, const char *buf, size_t count) 1191 { 1192 unsigned long value; 1193 char *rest; 1194 1195 value = simple_strtoul(buf, &rest, 10); 1196 if (*rest) 1197 return -EINVAL; 1198 1199 psmouse->set_resolution(psmouse, value); 1200 return count; 1201 } 1202 1203 static ssize_t psmouse_attr_show_resetafter(struct psmouse *psmouse, char *buf) 1204 { 1205 return sprintf(buf, "%d\n", psmouse->resetafter); 1206 } 1207 1208 static ssize_t psmouse_attr_set_resetafter(struct psmouse *psmouse, const char *buf, size_t count) 1209 { 1210 unsigned long value; 1211 char *rest; 1212 1213 value = simple_strtoul(buf, &rest, 10); 1214 if (*rest) 1215 return -EINVAL; 1216 1217 psmouse->resetafter = value; 1218 return count; 1219 } 1220 1221 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1222 { 1223 struct psmouse_protocol *proto; 1224 1225 if (!val) 1226 return -EINVAL; 1227 1228 proto = psmouse_protocol_by_name(val, strlen(val)); 1229 1230 if (!proto || !proto->maxproto) 1231 return -EINVAL; 1232 1233 *((unsigned int *)kp->arg) = proto->type; 1234 1235 return 0; \ 1236 } 1237 1238 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1239 { 1240 int type = *((unsigned int *)kp->arg); 1241 1242 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1243 } 1244 1245 static int __init psmouse_init(void) 1246 { 1247 serio_register_driver(&psmouse_drv); 1248 return 0; 1249 } 1250 1251 static void __exit psmouse_exit(void) 1252 { 1253 serio_unregister_driver(&psmouse_drv); 1254 } 1255 1256 module_init(psmouse_init); 1257 module_exit(psmouse_exit); 1258