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