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 #include "touchkit_ps2.h" 32 33 #define DRIVER_DESC "PS/2 mouse driver" 34 35 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 36 MODULE_DESCRIPTION(DRIVER_DESC); 37 MODULE_LICENSE("GPL"); 38 39 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 40 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 41 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 42 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 43 #define param_set_proto_abbrev psmouse_set_maxproto 44 #define param_get_proto_abbrev psmouse_get_maxproto 45 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 46 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 47 48 static unsigned int psmouse_resolution = 200; 49 module_param_named(resolution, psmouse_resolution, uint, 0644); 50 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 51 52 static unsigned int psmouse_rate = 100; 53 module_param_named(rate, psmouse_rate, uint, 0644); 54 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 55 56 static unsigned int psmouse_smartscroll = 1; 57 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 58 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 59 60 static unsigned int psmouse_resetafter = 5; 61 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 62 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 63 64 static unsigned int psmouse_resync_time; 65 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 66 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 67 68 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 69 NULL, 70 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 71 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 72 (void *) offsetof(struct psmouse, rate), 73 psmouse_show_int_attr, psmouse_attr_set_rate); 74 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 75 (void *) offsetof(struct psmouse, resolution), 76 psmouse_show_int_attr, psmouse_attr_set_resolution); 77 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 78 (void *) offsetof(struct psmouse, resetafter), 79 psmouse_show_int_attr, psmouse_set_int_attr); 80 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 81 (void *) offsetof(struct psmouse, resync_time), 82 psmouse_show_int_attr, psmouse_set_int_attr); 83 84 static struct attribute *psmouse_attributes[] = { 85 &psmouse_attr_protocol.dattr.attr, 86 &psmouse_attr_rate.dattr.attr, 87 &psmouse_attr_resolution.dattr.attr, 88 &psmouse_attr_resetafter.dattr.attr, 89 &psmouse_attr_resync_time.dattr.attr, 90 NULL 91 }; 92 93 static struct attribute_group psmouse_attribute_group = { 94 .attrs = psmouse_attributes, 95 }; 96 97 /* 98 * psmouse_mutex protects all operations changing state of mouse 99 * (connecting, disconnecting, changing rate or resolution via 100 * sysfs). We could use a per-device semaphore but since there 101 * rarely more than one PS/2 mouse connected and since semaphore 102 * is taken in "slow" paths it is not worth it. 103 */ 104 static DEFINE_MUTEX(psmouse_mutex); 105 106 static struct workqueue_struct *kpsmoused_wq; 107 108 struct psmouse_protocol { 109 enum psmouse_type type; 110 const char *name; 111 const char *alias; 112 int maxproto; 113 int (*detect)(struct psmouse *, int); 114 int (*init)(struct psmouse *); 115 }; 116 117 /* 118 * psmouse_process_byte() analyzes the PS/2 data stream and reports 119 * relevant events to the input module once full packet has arrived. 120 */ 121 122 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 123 { 124 struct input_dev *dev = psmouse->dev; 125 unsigned char *packet = psmouse->packet; 126 127 if (psmouse->pktcnt < psmouse->pktsize) 128 return PSMOUSE_GOOD_DATA; 129 130 /* 131 * Full packet accumulated, process it 132 */ 133 134 /* 135 * Scroll wheel on IntelliMice, scroll buttons on NetMice 136 */ 137 138 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 139 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 140 141 /* 142 * Scroll wheel and buttons on IntelliMouse Explorer 143 */ 144 145 if (psmouse->type == PSMOUSE_IMEX) { 146 switch (packet[3] & 0xC0) { 147 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 148 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 149 break; 150 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 151 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 152 break; 153 case 0x00: 154 case 0xC0: 155 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 156 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 157 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 158 break; 159 } 160 } 161 162 /* 163 * Extra buttons on Genius NewNet 3D 164 */ 165 166 if (psmouse->type == PSMOUSE_GENPS) { 167 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 168 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 169 } 170 171 /* 172 * Extra button on ThinkingMouse 173 */ 174 if (psmouse->type == PSMOUSE_THINKPS) { 175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 176 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 177 packet[1] |= (packet[0] & 0x40) << 1; 178 } 179 180 /* 181 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 182 * byte. 183 */ 184 if (psmouse->type == PSMOUSE_CORTRON) { 185 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 186 packet[0] |= 0x08; 187 } 188 189 /* 190 * Generic PS/2 Mouse 191 */ 192 193 input_report_key(dev, BTN_LEFT, packet[0] & 1); 194 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 195 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 196 197 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 198 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 199 200 input_sync(dev); 201 202 return PSMOUSE_FULL_PACKET; 203 } 204 205 /* 206 * __psmouse_set_state() sets new psmouse state and resets all flags. 207 */ 208 209 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 210 { 211 psmouse->state = new_state; 212 psmouse->pktcnt = psmouse->out_of_sync = 0; 213 psmouse->ps2dev.flags = 0; 214 psmouse->last = jiffies; 215 } 216 217 218 /* 219 * psmouse_set_state() sets new psmouse state and resets all flags and 220 * counters while holding serio lock so fighting with interrupt handler 221 * is not a concern. 222 */ 223 224 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 225 { 226 serio_pause_rx(psmouse->ps2dev.serio); 227 __psmouse_set_state(psmouse, new_state); 228 serio_continue_rx(psmouse->ps2dev.serio); 229 } 230 231 /* 232 * psmouse_handle_byte() processes one byte of the input data stream 233 * by calling corresponding protocol handler. 234 */ 235 236 static int psmouse_handle_byte(struct psmouse *psmouse) 237 { 238 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 239 240 switch (rc) { 241 case PSMOUSE_BAD_DATA: 242 if (psmouse->state == PSMOUSE_ACTIVATED) { 243 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 244 psmouse->name, psmouse->phys, psmouse->pktcnt); 245 if (++psmouse->out_of_sync == psmouse->resetafter) { 246 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 247 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 248 serio_reconnect(psmouse->ps2dev.serio); 249 return -1; 250 } 251 } 252 psmouse->pktcnt = 0; 253 break; 254 255 case PSMOUSE_FULL_PACKET: 256 psmouse->pktcnt = 0; 257 if (psmouse->out_of_sync) { 258 psmouse->out_of_sync = 0; 259 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 260 psmouse->name, psmouse->phys); 261 } 262 break; 263 264 case PSMOUSE_GOOD_DATA: 265 break; 266 } 267 return 0; 268 } 269 270 /* 271 * psmouse_interrupt() handles incoming characters, either passing them 272 * for normal processing or gathering them as command response. 273 */ 274 275 static irqreturn_t psmouse_interrupt(struct serio *serio, 276 unsigned char data, unsigned int flags) 277 { 278 struct psmouse *psmouse = serio_get_drvdata(serio); 279 280 if (psmouse->state == PSMOUSE_IGNORE) 281 goto out; 282 283 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 284 if (psmouse->state == PSMOUSE_ACTIVATED) 285 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 286 flags & SERIO_TIMEOUT ? " timeout" : "", 287 flags & SERIO_PARITY ? " bad parity" : ""); 288 ps2_cmd_aborted(&psmouse->ps2dev); 289 goto out; 290 } 291 292 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 293 if (ps2_handle_ack(&psmouse->ps2dev, data)) 294 goto out; 295 296 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 297 if (ps2_handle_response(&psmouse->ps2dev, data)) 298 goto out; 299 300 if (psmouse->state <= PSMOUSE_RESYNCING) 301 goto out; 302 303 if (psmouse->state == PSMOUSE_ACTIVATED && 304 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 305 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 306 psmouse->name, psmouse->phys, psmouse->pktcnt); 307 psmouse->badbyte = psmouse->packet[0]; 308 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 309 queue_work(kpsmoused_wq, &psmouse->resync_work); 310 goto out; 311 } 312 313 psmouse->packet[psmouse->pktcnt++] = data; 314 /* 315 * Check if this is a new device announcement (0xAA 0x00) 316 */ 317 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 318 if (psmouse->pktcnt == 1) { 319 psmouse->last = jiffies; 320 goto out; 321 } 322 323 if (psmouse->packet[1] == PSMOUSE_RET_ID) { 324 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 325 serio_reconnect(serio); 326 goto out; 327 } 328 /* 329 * Not a new device, try processing first byte normally 330 */ 331 psmouse->pktcnt = 1; 332 if (psmouse_handle_byte(psmouse)) 333 goto out; 334 335 psmouse->packet[psmouse->pktcnt++] = data; 336 } 337 338 /* 339 * See if we need to force resync because mouse was idle for too long 340 */ 341 if (psmouse->state == PSMOUSE_ACTIVATED && 342 psmouse->pktcnt == 1 && psmouse->resync_time && 343 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 344 psmouse->badbyte = psmouse->packet[0]; 345 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 346 queue_work(kpsmoused_wq, &psmouse->resync_work); 347 goto out; 348 } 349 350 psmouse->last = jiffies; 351 psmouse_handle_byte(psmouse); 352 353 out: 354 return IRQ_HANDLED; 355 } 356 357 358 /* 359 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 360 * using sliced syntax, understood by advanced devices, such as Logitech 361 * or Synaptics touchpads. The command is encoded as: 362 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 363 * is the command. 364 */ 365 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 366 { 367 int i; 368 369 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 370 return -1; 371 372 for (i = 6; i >= 0; i -= 2) { 373 unsigned char d = (command >> i) & 3; 374 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 375 return -1; 376 } 377 378 return 0; 379 } 380 381 382 /* 383 * psmouse_reset() resets the mouse into power-on state. 384 */ 385 int psmouse_reset(struct psmouse *psmouse) 386 { 387 unsigned char param[2]; 388 389 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 390 return -1; 391 392 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 393 return -1; 394 395 return 0; 396 } 397 398 399 /* 400 * Genius NetMouse magic init. 401 */ 402 static int genius_detect(struct psmouse *psmouse, int set_properties) 403 { 404 struct ps2dev *ps2dev = &psmouse->ps2dev; 405 unsigned char param[4]; 406 407 param[0] = 3; 408 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 410 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 411 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 412 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 413 414 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 415 return -1; 416 417 if (set_properties) { 418 set_bit(BTN_EXTRA, psmouse->dev->keybit); 419 set_bit(BTN_SIDE, psmouse->dev->keybit); 420 set_bit(REL_WHEEL, psmouse->dev->relbit); 421 422 psmouse->vendor = "Genius"; 423 psmouse->name = "Mouse"; 424 psmouse->pktsize = 4; 425 } 426 427 return 0; 428 } 429 430 /* 431 * IntelliMouse magic init. 432 */ 433 static int intellimouse_detect(struct psmouse *psmouse, int set_properties) 434 { 435 struct ps2dev *ps2dev = &psmouse->ps2dev; 436 unsigned char param[2]; 437 438 param[0] = 200; 439 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 440 param[0] = 100; 441 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 442 param[0] = 80; 443 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 444 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 445 446 if (param[0] != 3) 447 return -1; 448 449 if (set_properties) { 450 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 451 set_bit(REL_WHEEL, psmouse->dev->relbit); 452 453 if (!psmouse->vendor) psmouse->vendor = "Generic"; 454 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 455 psmouse->pktsize = 4; 456 } 457 458 return 0; 459 } 460 461 /* 462 * Try IntelliMouse/Explorer magic init. 463 */ 464 static int im_explorer_detect(struct psmouse *psmouse, int set_properties) 465 { 466 struct ps2dev *ps2dev = &psmouse->ps2dev; 467 unsigned char param[2]; 468 469 intellimouse_detect(psmouse, 0); 470 471 param[0] = 200; 472 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 473 param[0] = 200; 474 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 475 param[0] = 80; 476 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 477 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 478 479 if (param[0] != 4) 480 return -1; 481 482 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 483 param[0] = 200; 484 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 485 param[0] = 80; 486 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 487 param[0] = 40; 488 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 489 490 if (set_properties) { 491 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 492 set_bit(REL_WHEEL, psmouse->dev->relbit); 493 set_bit(REL_HWHEEL, psmouse->dev->relbit); 494 set_bit(BTN_SIDE, psmouse->dev->keybit); 495 set_bit(BTN_EXTRA, psmouse->dev->keybit); 496 497 if (!psmouse->vendor) psmouse->vendor = "Generic"; 498 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 499 psmouse->pktsize = 4; 500 } 501 502 return 0; 503 } 504 505 /* 506 * Kensington ThinkingMouse / ExpertMouse magic init. 507 */ 508 static int thinking_detect(struct psmouse *psmouse, int set_properties) 509 { 510 struct ps2dev *ps2dev = &psmouse->ps2dev; 511 unsigned char param[2]; 512 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 513 int i; 514 515 param[0] = 10; 516 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 517 param[0] = 0; 518 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 519 for (i = 0; i < ARRAY_SIZE(seq); i++) { 520 param[0] = seq[i]; 521 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 522 } 523 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 524 525 if (param[0] != 2) 526 return -1; 527 528 if (set_properties) { 529 set_bit(BTN_EXTRA, psmouse->dev->keybit); 530 531 psmouse->vendor = "Kensington"; 532 psmouse->name = "ThinkingMouse"; 533 } 534 535 return 0; 536 } 537 538 /* 539 * Bare PS/2 protocol "detection". Always succeeds. 540 */ 541 static int ps2bare_detect(struct psmouse *psmouse, int set_properties) 542 { 543 if (set_properties) { 544 if (!psmouse->vendor) psmouse->vendor = "Generic"; 545 if (!psmouse->name) psmouse->name = "Mouse"; 546 } 547 548 return 0; 549 } 550 551 /* 552 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 553 * must be forced by sysfs protocol writing. 554 */ 555 static int cortron_detect(struct psmouse *psmouse, int set_properties) 556 { 557 if (set_properties) { 558 psmouse->vendor = "Cortron"; 559 psmouse->name = "PS/2 Trackball"; 560 set_bit(BTN_SIDE, psmouse->dev->keybit); 561 } 562 563 return 0; 564 } 565 566 /* 567 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 568 * the mouse may have. 569 */ 570 571 static int psmouse_extensions(struct psmouse *psmouse, 572 unsigned int max_proto, int set_properties) 573 { 574 int synaptics_hardware = 0; 575 576 /* 577 * We always check for lifebook because it does not disturb mouse 578 * (it only checks DMI information). 579 */ 580 if (lifebook_detect(psmouse, set_properties) == 0) { 581 if (max_proto > PSMOUSE_IMEX) { 582 if (!set_properties || lifebook_init(psmouse) == 0) 583 return PSMOUSE_LIFEBOOK; 584 } 585 } 586 587 /* 588 * Try Kensington ThinkingMouse (we try first, because synaptics probe 589 * upsets the thinkingmouse). 590 */ 591 592 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 593 return PSMOUSE_THINKPS; 594 595 /* 596 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 597 * support is disabled in config - we need to know if it is synaptics so we 598 * can reset it properly after probing for intellimouse. 599 */ 600 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 601 synaptics_hardware = 1; 602 603 if (max_proto > PSMOUSE_IMEX) { 604 if (!set_properties || synaptics_init(psmouse) == 0) 605 return PSMOUSE_SYNAPTICS; 606 /* 607 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 608 * Unfortunately Logitech/Genius probes confuse some firmware versions so 609 * we'll have to skip them. 610 */ 611 max_proto = PSMOUSE_IMEX; 612 } 613 /* 614 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 615 */ 616 synaptics_reset(psmouse); 617 } 618 619 /* 620 * Try ALPS TouchPad 621 */ 622 if (max_proto > PSMOUSE_IMEX) { 623 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 624 if (alps_detect(psmouse, set_properties) == 0) { 625 if (!set_properties || alps_init(psmouse) == 0) 626 return PSMOUSE_ALPS; 627 /* 628 * Init failed, try basic relative protocols 629 */ 630 max_proto = PSMOUSE_IMEX; 631 } 632 } 633 634 if (max_proto > PSMOUSE_IMEX) { 635 636 if (genius_detect(psmouse, set_properties) == 0) 637 return PSMOUSE_GENPS; 638 639 if (ps2pp_init(psmouse, set_properties) == 0) 640 return PSMOUSE_PS2PP; 641 642 if (trackpoint_detect(psmouse, set_properties) == 0) 643 return PSMOUSE_TRACKPOINT; 644 645 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 646 return PSMOUSE_TOUCHKIT_PS2; 647 } 648 649 /* 650 * Reset to defaults in case the device got confused by extended 651 * protocol probes. Note that we do full reset becuase some mice 652 * put themselves to sleep when see PSMOUSE_RESET_DIS. 653 */ 654 psmouse_reset(psmouse); 655 656 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 657 return PSMOUSE_IMEX; 658 659 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 660 return PSMOUSE_IMPS; 661 662 /* 663 * Okay, all failed, we have a standard mouse here. The number of the buttons 664 * is still a question, though. We assume 3. 665 */ 666 ps2bare_detect(psmouse, set_properties); 667 668 if (synaptics_hardware) { 669 /* 670 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 671 * We need to reset the touchpad because if there is a track point on the 672 * pass through port it could get disabled while probing for protocol 673 * extensions. 674 */ 675 psmouse_reset(psmouse); 676 } 677 678 return PSMOUSE_PS2; 679 } 680 681 static const struct psmouse_protocol psmouse_protocols[] = { 682 { 683 .type = PSMOUSE_PS2, 684 .name = "PS/2", 685 .alias = "bare", 686 .maxproto = 1, 687 .detect = ps2bare_detect, 688 }, 689 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 690 { 691 .type = PSMOUSE_PS2PP, 692 .name = "PS2++", 693 .alias = "logitech", 694 .detect = ps2pp_init, 695 }, 696 #endif 697 { 698 .type = PSMOUSE_THINKPS, 699 .name = "ThinkPS/2", 700 .alias = "thinkps", 701 .detect = thinking_detect, 702 }, 703 { 704 .type = PSMOUSE_GENPS, 705 .name = "GenPS/2", 706 .alias = "genius", 707 .detect = genius_detect, 708 }, 709 { 710 .type = PSMOUSE_IMPS, 711 .name = "ImPS/2", 712 .alias = "imps", 713 .maxproto = 1, 714 .detect = intellimouse_detect, 715 }, 716 { 717 .type = PSMOUSE_IMEX, 718 .name = "ImExPS/2", 719 .alias = "exps", 720 .maxproto = 1, 721 .detect = im_explorer_detect, 722 }, 723 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 724 { 725 .type = PSMOUSE_SYNAPTICS, 726 .name = "SynPS/2", 727 .alias = "synaptics", 728 .detect = synaptics_detect, 729 .init = synaptics_init, 730 }, 731 #endif 732 #ifdef CONFIG_MOUSE_PS2_ALPS 733 { 734 .type = PSMOUSE_ALPS, 735 .name = "AlpsPS/2", 736 .alias = "alps", 737 .detect = alps_detect, 738 .init = alps_init, 739 }, 740 #endif 741 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 742 { 743 .type = PSMOUSE_LIFEBOOK, 744 .name = "LBPS/2", 745 .alias = "lifebook", 746 .init = lifebook_init, 747 }, 748 #endif 749 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 750 { 751 .type = PSMOUSE_TRACKPOINT, 752 .name = "TPPS/2", 753 .alias = "trackpoint", 754 .detect = trackpoint_detect, 755 }, 756 #endif 757 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 758 { 759 .type = PSMOUSE_TOUCHKIT_PS2, 760 .name = "touchkitPS/2", 761 .alias = "touchkit", 762 .detect = touchkit_ps2_detect, 763 }, 764 #endif 765 { 766 .type = PSMOUSE_CORTRON, 767 .name = "CortronPS/2", 768 .alias = "cortps", 769 .detect = cortron_detect, 770 }, 771 { 772 .type = PSMOUSE_AUTO, 773 .name = "auto", 774 .alias = "any", 775 .maxproto = 1, 776 }, 777 }; 778 779 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 780 { 781 int i; 782 783 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 784 if (psmouse_protocols[i].type == type) 785 return &psmouse_protocols[i]; 786 787 WARN_ON(1); 788 return &psmouse_protocols[0]; 789 } 790 791 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 792 { 793 const struct psmouse_protocol *p; 794 int i; 795 796 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 797 p = &psmouse_protocols[i]; 798 799 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 800 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 801 return &psmouse_protocols[i]; 802 } 803 804 return NULL; 805 } 806 807 808 /* 809 * psmouse_probe() probes for a PS/2 mouse. 810 */ 811 812 static int psmouse_probe(struct psmouse *psmouse) 813 { 814 struct ps2dev *ps2dev = &psmouse->ps2dev; 815 unsigned char param[2]; 816 817 /* 818 * First, we check if it's a mouse. It should send 0x00 or 0x03 819 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 820 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 821 * ID queries, probably due to a firmware bug. 822 */ 823 824 param[0] = 0xa5; 825 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 826 return -1; 827 828 if (param[0] != 0x00 && param[0] != 0x03 && 829 param[0] != 0x04 && param[0] != 0xff) 830 return -1; 831 832 /* 833 * Then we reset and disable the mouse so that it doesn't generate events. 834 */ 835 836 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 837 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 838 839 return 0; 840 } 841 842 /* 843 * Here we set the mouse resolution. 844 */ 845 846 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 847 { 848 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 849 unsigned char p; 850 851 if (resolution == 0 || resolution > 200) 852 resolution = 200; 853 854 p = params[resolution / 50]; 855 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 856 psmouse->resolution = 25 << p; 857 } 858 859 /* 860 * Here we set the mouse report rate. 861 */ 862 863 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 864 { 865 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 866 unsigned char r; 867 int i = 0; 868 869 while (rates[i] > rate) i++; 870 r = rates[i]; 871 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 872 psmouse->rate = r; 873 } 874 875 /* 876 * psmouse_initialize() initializes the mouse to a sane state. 877 */ 878 879 static void psmouse_initialize(struct psmouse *psmouse) 880 { 881 /* 882 * We set the mouse report rate, resolution and scaling. 883 */ 884 885 if (psmouse_max_proto != PSMOUSE_PS2) { 886 psmouse->set_rate(psmouse, psmouse->rate); 887 psmouse->set_resolution(psmouse, psmouse->resolution); 888 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 889 } 890 } 891 892 /* 893 * psmouse_activate() enables the mouse so that we get motion reports from it. 894 */ 895 896 static void psmouse_activate(struct psmouse *psmouse) 897 { 898 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 899 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 900 psmouse->ps2dev.serio->phys); 901 902 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 903 } 904 905 906 /* 907 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 908 * reports from it unless we explicitely request it. 909 */ 910 911 static void psmouse_deactivate(struct psmouse *psmouse) 912 { 913 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 914 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 915 psmouse->ps2dev.serio->phys); 916 917 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 918 } 919 920 /* 921 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 922 */ 923 924 static int psmouse_poll(struct psmouse *psmouse) 925 { 926 return ps2_command(&psmouse->ps2dev, psmouse->packet, 927 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 928 } 929 930 931 /* 932 * psmouse_resync() attempts to re-validate current protocol. 933 */ 934 935 static void psmouse_resync(struct work_struct *work) 936 { 937 struct psmouse *parent = NULL, *psmouse = 938 container_of(work, struct psmouse, resync_work); 939 struct serio *serio = psmouse->ps2dev.serio; 940 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 941 int failed = 0, enabled = 0; 942 int i; 943 944 mutex_lock(&psmouse_mutex); 945 946 if (psmouse->state != PSMOUSE_RESYNCING) 947 goto out; 948 949 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 950 parent = serio_get_drvdata(serio->parent); 951 psmouse_deactivate(parent); 952 } 953 954 /* 955 * Some mice don't ACK commands sent while they are in the middle of 956 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 957 * instead of ps2_command() which would wait for 200ms for an ACK 958 * that may never come. 959 * As an additional quirk ALPS touchpads may not only forget to ACK 960 * disable command but will stop reporting taps, so if we see that 961 * mouse at least once ACKs disable we will do full reconnect if ACK 962 * is missing. 963 */ 964 psmouse->num_resyncs++; 965 966 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 967 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 968 failed = 1; 969 } else 970 psmouse->acks_disable_command = 1; 971 972 /* 973 * Poll the mouse. If it was reset the packet will be shorter than 974 * psmouse->pktsize and ps2_command will fail. We do not expect and 975 * do not handle scenario when mouse "upgrades" its protocol while 976 * disconnected since it would require additional delay. If we ever 977 * see a mouse that does it we'll adjust the code. 978 */ 979 if (!failed) { 980 if (psmouse->poll(psmouse)) 981 failed = 1; 982 else { 983 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 984 for (i = 0; i < psmouse->pktsize; i++) { 985 psmouse->pktcnt++; 986 rc = psmouse->protocol_handler(psmouse); 987 if (rc != PSMOUSE_GOOD_DATA) 988 break; 989 } 990 if (rc != PSMOUSE_FULL_PACKET) 991 failed = 1; 992 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 993 } 994 } 995 /* 996 * Now try to enable mouse. We try to do that even if poll failed and also 997 * repeat our attempts 5 times, otherwise we may be left out with disabled 998 * mouse. 999 */ 1000 for (i = 0; i < 5; i++) { 1001 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1002 enabled = 1; 1003 break; 1004 } 1005 msleep(200); 1006 } 1007 1008 if (!enabled) { 1009 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1010 psmouse->ps2dev.serio->phys); 1011 failed = 1; 1012 } 1013 1014 if (failed) { 1015 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1016 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1017 serio_reconnect(serio); 1018 } else 1019 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1020 1021 if (parent) 1022 psmouse_activate(parent); 1023 out: 1024 mutex_unlock(&psmouse_mutex); 1025 } 1026 1027 /* 1028 * psmouse_cleanup() resets the mouse into power-on state. 1029 */ 1030 1031 static void psmouse_cleanup(struct serio *serio) 1032 { 1033 struct psmouse *psmouse = serio_get_drvdata(serio); 1034 struct psmouse *parent = NULL; 1035 1036 mutex_lock(&psmouse_mutex); 1037 1038 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1039 parent = serio_get_drvdata(serio->parent); 1040 psmouse_deactivate(parent); 1041 } 1042 1043 psmouse_deactivate(psmouse); 1044 1045 if (psmouse->cleanup) 1046 psmouse->cleanup(psmouse); 1047 1048 psmouse_reset(psmouse); 1049 1050 /* 1051 * Some boxes, such as HP nx7400, get terribly confused if mouse 1052 * is not fully enabled before suspending/shutting down. 1053 */ 1054 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1055 1056 if (parent) { 1057 if (parent->pt_deactivate) 1058 parent->pt_deactivate(parent); 1059 1060 psmouse_activate(parent); 1061 } 1062 1063 mutex_unlock(&psmouse_mutex); 1064 } 1065 1066 /* 1067 * psmouse_disconnect() closes and frees. 1068 */ 1069 1070 static void psmouse_disconnect(struct serio *serio) 1071 { 1072 struct psmouse *psmouse, *parent = NULL; 1073 1074 psmouse = serio_get_drvdata(serio); 1075 1076 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1077 1078 mutex_lock(&psmouse_mutex); 1079 1080 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1081 1082 /* make sure we don't have a resync in progress */ 1083 mutex_unlock(&psmouse_mutex); 1084 flush_workqueue(kpsmoused_wq); 1085 mutex_lock(&psmouse_mutex); 1086 1087 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1088 parent = serio_get_drvdata(serio->parent); 1089 psmouse_deactivate(parent); 1090 } 1091 1092 if (psmouse->disconnect) 1093 psmouse->disconnect(psmouse); 1094 1095 if (parent && parent->pt_deactivate) 1096 parent->pt_deactivate(parent); 1097 1098 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1099 1100 serio_close(serio); 1101 serio_set_drvdata(serio, NULL); 1102 input_unregister_device(psmouse->dev); 1103 kfree(psmouse); 1104 1105 if (parent) 1106 psmouse_activate(parent); 1107 1108 mutex_unlock(&psmouse_mutex); 1109 } 1110 1111 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto) 1112 { 1113 struct input_dev *input_dev = psmouse->dev; 1114 1115 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1116 1117 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 1118 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 1119 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); 1120 1121 psmouse->set_rate = psmouse_set_rate; 1122 psmouse->set_resolution = psmouse_set_resolution; 1123 psmouse->poll = psmouse_poll; 1124 psmouse->protocol_handler = psmouse_process_byte; 1125 psmouse->pktsize = 3; 1126 1127 if (proto && (proto->detect || proto->init)) { 1128 if (proto->detect && proto->detect(psmouse, 1) < 0) 1129 return -1; 1130 1131 if (proto->init && proto->init(psmouse) < 0) 1132 return -1; 1133 1134 psmouse->type = proto->type; 1135 } 1136 else 1137 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); 1138 1139 /* 1140 * If mouse's packet size is 3 there is no point in polling the 1141 * device in hopes to detect protocol reset - we won't get less 1142 * than 3 bytes response anyhow. 1143 */ 1144 if (psmouse->pktsize == 3) 1145 psmouse->resync_time = 0; 1146 1147 /* 1148 * Some smart KVMs fake response to POLL command returning just 1149 * 3 bytes and messing up our resync logic, so if initial poll 1150 * fails we won't try polling the device anymore. Hopefully 1151 * such KVM will maintain initially selected protocol. 1152 */ 1153 if (psmouse->resync_time && psmouse->poll(psmouse)) 1154 psmouse->resync_time = 0; 1155 1156 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1157 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1158 1159 input_dev->name = psmouse->devname; 1160 input_dev->phys = psmouse->phys; 1161 input_dev->id.bustype = BUS_I8042; 1162 input_dev->id.vendor = 0x0002; 1163 input_dev->id.product = psmouse->type; 1164 input_dev->id.version = psmouse->model; 1165 1166 return 0; 1167 } 1168 1169 /* 1170 * psmouse_connect() is a callback from the serio module when 1171 * an unhandled serio port is found. 1172 */ 1173 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1174 { 1175 struct psmouse *psmouse, *parent = NULL; 1176 struct input_dev *input_dev; 1177 int retval = 0, error = -ENOMEM; 1178 1179 mutex_lock(&psmouse_mutex); 1180 1181 /* 1182 * If this is a pass-through port deactivate parent so the device 1183 * connected to this port can be successfully identified 1184 */ 1185 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1186 parent = serio_get_drvdata(serio->parent); 1187 psmouse_deactivate(parent); 1188 } 1189 1190 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1191 input_dev = input_allocate_device(); 1192 if (!psmouse || !input_dev) 1193 goto err_free; 1194 1195 ps2_init(&psmouse->ps2dev, serio); 1196 INIT_WORK(&psmouse->resync_work, psmouse_resync); 1197 psmouse->dev = input_dev; 1198 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1199 1200 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1201 1202 serio_set_drvdata(serio, psmouse); 1203 1204 error = serio_open(serio, drv); 1205 if (error) 1206 goto err_clear_drvdata; 1207 1208 if (psmouse_probe(psmouse) < 0) { 1209 error = -ENODEV; 1210 goto err_close_serio; 1211 } 1212 1213 psmouse->rate = psmouse_rate; 1214 psmouse->resolution = psmouse_resolution; 1215 psmouse->resetafter = psmouse_resetafter; 1216 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1217 psmouse->smartscroll = psmouse_smartscroll; 1218 1219 psmouse_switch_protocol(psmouse, NULL); 1220 1221 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1222 psmouse_initialize(psmouse); 1223 1224 error = input_register_device(psmouse->dev); 1225 if (error) 1226 goto err_protocol_disconnect; 1227 1228 if (parent && parent->pt_activate) 1229 parent->pt_activate(parent); 1230 1231 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1232 if (error) 1233 goto err_pt_deactivate; 1234 1235 psmouse_activate(psmouse); 1236 1237 out: 1238 /* If this is a pass-through port the parent needs to be re-activated */ 1239 if (parent) 1240 psmouse_activate(parent); 1241 1242 mutex_unlock(&psmouse_mutex); 1243 return retval; 1244 1245 err_pt_deactivate: 1246 if (parent && parent->pt_deactivate) 1247 parent->pt_deactivate(parent); 1248 err_protocol_disconnect: 1249 if (psmouse->disconnect) 1250 psmouse->disconnect(psmouse); 1251 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1252 err_close_serio: 1253 serio_close(serio); 1254 err_clear_drvdata: 1255 serio_set_drvdata(serio, NULL); 1256 err_free: 1257 input_free_device(input_dev); 1258 kfree(psmouse); 1259 1260 retval = error; 1261 goto out; 1262 } 1263 1264 1265 static int psmouse_reconnect(struct serio *serio) 1266 { 1267 struct psmouse *psmouse = serio_get_drvdata(serio); 1268 struct psmouse *parent = NULL; 1269 struct serio_driver *drv = serio->drv; 1270 int rc = -1; 1271 1272 if (!drv || !psmouse) { 1273 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1274 return -1; 1275 } 1276 1277 mutex_lock(&psmouse_mutex); 1278 1279 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1280 parent = serio_get_drvdata(serio->parent); 1281 psmouse_deactivate(parent); 1282 } 1283 1284 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1285 1286 if (psmouse->reconnect) { 1287 if (psmouse->reconnect(psmouse)) 1288 goto out; 1289 } else if (psmouse_probe(psmouse) < 0 || 1290 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) 1291 goto out; 1292 1293 /* ok, the device type (and capabilities) match the old one, 1294 * we can continue using it, complete intialization 1295 */ 1296 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1297 1298 psmouse_initialize(psmouse); 1299 1300 if (parent && parent->pt_activate) 1301 parent->pt_activate(parent); 1302 1303 psmouse_activate(psmouse); 1304 rc = 0; 1305 1306 out: 1307 /* If this is a pass-through port the parent waits to be activated */ 1308 if (parent) 1309 psmouse_activate(parent); 1310 1311 mutex_unlock(&psmouse_mutex); 1312 return rc; 1313 } 1314 1315 static struct serio_device_id psmouse_serio_ids[] = { 1316 { 1317 .type = SERIO_8042, 1318 .proto = SERIO_ANY, 1319 .id = SERIO_ANY, 1320 .extra = SERIO_ANY, 1321 }, 1322 { 1323 .type = SERIO_PS_PSTHRU, 1324 .proto = SERIO_ANY, 1325 .id = SERIO_ANY, 1326 .extra = SERIO_ANY, 1327 }, 1328 { 0 } 1329 }; 1330 1331 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1332 1333 static struct serio_driver psmouse_drv = { 1334 .driver = { 1335 .name = "psmouse", 1336 }, 1337 .description = DRIVER_DESC, 1338 .id_table = psmouse_serio_ids, 1339 .interrupt = psmouse_interrupt, 1340 .connect = psmouse_connect, 1341 .reconnect = psmouse_reconnect, 1342 .disconnect = psmouse_disconnect, 1343 .cleanup = psmouse_cleanup, 1344 }; 1345 1346 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1347 char *buf) 1348 { 1349 struct serio *serio = to_serio_port(dev); 1350 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1351 struct psmouse *psmouse; 1352 int retval; 1353 1354 retval = serio_pin_driver(serio); 1355 if (retval) 1356 return retval; 1357 1358 if (serio->drv != &psmouse_drv) { 1359 retval = -ENODEV; 1360 goto out; 1361 } 1362 1363 psmouse = serio_get_drvdata(serio); 1364 1365 retval = attr->show(psmouse, attr->data, buf); 1366 1367 out: 1368 serio_unpin_driver(serio); 1369 return retval; 1370 } 1371 1372 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1373 const char *buf, size_t count) 1374 { 1375 struct serio *serio = to_serio_port(dev); 1376 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1377 struct psmouse *psmouse, *parent = NULL; 1378 int retval; 1379 1380 retval = serio_pin_driver(serio); 1381 if (retval) 1382 return retval; 1383 1384 if (serio->drv != &psmouse_drv) { 1385 retval = -ENODEV; 1386 goto out_unpin; 1387 } 1388 1389 retval = mutex_lock_interruptible(&psmouse_mutex); 1390 if (retval) 1391 goto out_unpin; 1392 1393 psmouse = serio_get_drvdata(serio); 1394 1395 if (psmouse->state == PSMOUSE_IGNORE) { 1396 retval = -ENODEV; 1397 goto out_unlock; 1398 } 1399 1400 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1401 parent = serio_get_drvdata(serio->parent); 1402 psmouse_deactivate(parent); 1403 } 1404 1405 psmouse_deactivate(psmouse); 1406 1407 retval = attr->set(psmouse, attr->data, buf, count); 1408 1409 if (retval != -ENODEV) 1410 psmouse_activate(psmouse); 1411 1412 if (parent) 1413 psmouse_activate(parent); 1414 1415 out_unlock: 1416 mutex_unlock(&psmouse_mutex); 1417 out_unpin: 1418 serio_unpin_driver(serio); 1419 return retval; 1420 } 1421 1422 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1423 { 1424 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1425 1426 return sprintf(buf, "%u\n", *field); 1427 } 1428 1429 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1430 { 1431 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1432 unsigned long value; 1433 char *rest; 1434 1435 value = simple_strtoul(buf, &rest, 10); 1436 if (*rest) 1437 return -EINVAL; 1438 1439 if ((unsigned int)value != value) 1440 return -EINVAL; 1441 1442 *field = value; 1443 1444 return count; 1445 } 1446 1447 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1448 { 1449 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1450 } 1451 1452 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1453 { 1454 struct serio *serio = psmouse->ps2dev.serio; 1455 struct psmouse *parent = NULL; 1456 struct input_dev *old_dev, *new_dev; 1457 const struct psmouse_protocol *proto, *old_proto; 1458 int error; 1459 int retry = 0; 1460 1461 proto = psmouse_protocol_by_name(buf, count); 1462 if (!proto) 1463 return -EINVAL; 1464 1465 if (psmouse->type == proto->type) 1466 return count; 1467 1468 new_dev = input_allocate_device(); 1469 if (!new_dev) 1470 return -ENOMEM; 1471 1472 while (serio->child) { 1473 if (++retry > 3) { 1474 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); 1475 input_free_device(new_dev); 1476 return -EIO; 1477 } 1478 1479 mutex_unlock(&psmouse_mutex); 1480 serio_unpin_driver(serio); 1481 serio_unregister_child_port(serio); 1482 serio_pin_driver_uninterruptible(serio); 1483 mutex_lock(&psmouse_mutex); 1484 1485 if (serio->drv != &psmouse_drv) { 1486 input_free_device(new_dev); 1487 return -ENODEV; 1488 } 1489 1490 if (psmouse->type == proto->type) { 1491 input_free_device(new_dev); 1492 return count; /* switched by other thread */ 1493 } 1494 } 1495 1496 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1497 parent = serio_get_drvdata(serio->parent); 1498 if (parent->pt_deactivate) 1499 parent->pt_deactivate(parent); 1500 } 1501 1502 old_dev = psmouse->dev; 1503 old_proto = psmouse_protocol_by_type(psmouse->type); 1504 1505 if (psmouse->disconnect) 1506 psmouse->disconnect(psmouse); 1507 1508 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1509 1510 psmouse->dev = new_dev; 1511 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1512 1513 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1514 psmouse_reset(psmouse); 1515 /* default to PSMOUSE_PS2 */ 1516 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1517 } 1518 1519 psmouse_initialize(psmouse); 1520 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1521 1522 error = input_register_device(psmouse->dev); 1523 if (error) { 1524 if (psmouse->disconnect) 1525 psmouse->disconnect(psmouse); 1526 1527 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1528 input_free_device(new_dev); 1529 psmouse->dev = old_dev; 1530 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1531 psmouse_switch_protocol(psmouse, old_proto); 1532 psmouse_initialize(psmouse); 1533 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1534 1535 return error; 1536 } 1537 1538 input_unregister_device(old_dev); 1539 1540 if (parent && parent->pt_activate) 1541 parent->pt_activate(parent); 1542 1543 return count; 1544 } 1545 1546 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1547 { 1548 unsigned long value; 1549 char *rest; 1550 1551 value = simple_strtoul(buf, &rest, 10); 1552 if (*rest) 1553 return -EINVAL; 1554 1555 psmouse->set_rate(psmouse, value); 1556 return count; 1557 } 1558 1559 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1560 { 1561 unsigned long value; 1562 char *rest; 1563 1564 value = simple_strtoul(buf, &rest, 10); 1565 if (*rest) 1566 return -EINVAL; 1567 1568 psmouse->set_resolution(psmouse, value); 1569 return count; 1570 } 1571 1572 1573 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1574 { 1575 const struct psmouse_protocol *proto; 1576 1577 if (!val) 1578 return -EINVAL; 1579 1580 proto = psmouse_protocol_by_name(val, strlen(val)); 1581 1582 if (!proto || !proto->maxproto) 1583 return -EINVAL; 1584 1585 *((unsigned int *)kp->arg) = proto->type; 1586 1587 return 0; 1588 } 1589 1590 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1591 { 1592 int type = *((unsigned int *)kp->arg); 1593 1594 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1595 } 1596 1597 static int __init psmouse_init(void) 1598 { 1599 int err; 1600 1601 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1602 if (!kpsmoused_wq) { 1603 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1604 return -ENOMEM; 1605 } 1606 1607 err = serio_register_driver(&psmouse_drv); 1608 if (err) 1609 destroy_workqueue(kpsmoused_wq); 1610 1611 return err; 1612 } 1613 1614 static void __exit psmouse_exit(void) 1615 { 1616 serio_unregister_driver(&psmouse_drv); 1617 destroy_workqueue(kpsmoused_wq); 1618 } 1619 1620 module_init(psmouse_init); 1621 module_exit(psmouse_exit); 1622