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