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/slab.h> 17 #include <linux/interrupt.h> 18 #include <linux/input.h> 19 #include <linux/serio.h> 20 #include <linux/init.h> 21 #include <linux/libps2.h> 22 #include <linux/mutex.h> 23 24 #include "psmouse.h" 25 #include "synaptics.h" 26 #include "logips2pp.h" 27 #include "alps.h" 28 #include "hgpk.h" 29 #include "lifebook.h" 30 #include "trackpoint.h" 31 #include "touchkit_ps2.h" 32 #include "elantech.h" 33 #include "sentelic.h" 34 35 #define DRIVER_DESC "PS/2 mouse driver" 36 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 38 MODULE_DESCRIPTION(DRIVER_DESC); 39 MODULE_LICENSE("GPL"); 40 41 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 42 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 43 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 44 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 45 #define param_set_proto_abbrev psmouse_set_maxproto 46 #define param_get_proto_abbrev psmouse_get_maxproto 47 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 48 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 49 50 static unsigned int psmouse_resolution = 200; 51 module_param_named(resolution, psmouse_resolution, uint, 0644); 52 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 53 54 static unsigned int psmouse_rate = 100; 55 module_param_named(rate, psmouse_rate, uint, 0644); 56 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 57 58 static unsigned int psmouse_smartscroll = 1; 59 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 60 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 61 62 static unsigned int psmouse_resetafter = 5; 63 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 64 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 65 66 static unsigned int psmouse_resync_time; 67 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 68 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 69 70 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 71 NULL, 72 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 73 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 74 (void *) offsetof(struct psmouse, rate), 75 psmouse_show_int_attr, psmouse_attr_set_rate); 76 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 77 (void *) offsetof(struct psmouse, resolution), 78 psmouse_show_int_attr, psmouse_attr_set_resolution); 79 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 80 (void *) offsetof(struct psmouse, resetafter), 81 psmouse_show_int_attr, psmouse_set_int_attr); 82 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 83 (void *) offsetof(struct psmouse, resync_time), 84 psmouse_show_int_attr, psmouse_set_int_attr); 85 86 static struct attribute *psmouse_attributes[] = { 87 &psmouse_attr_protocol.dattr.attr, 88 &psmouse_attr_rate.dattr.attr, 89 &psmouse_attr_resolution.dattr.attr, 90 &psmouse_attr_resetafter.dattr.attr, 91 &psmouse_attr_resync_time.dattr.attr, 92 NULL 93 }; 94 95 static struct attribute_group psmouse_attribute_group = { 96 .attrs = psmouse_attributes, 97 }; 98 99 /* 100 * psmouse_mutex protects all operations changing state of mouse 101 * (connecting, disconnecting, changing rate or resolution via 102 * sysfs). We could use a per-device semaphore but since there 103 * rarely more than one PS/2 mouse connected and since semaphore 104 * is taken in "slow" paths it is not worth it. 105 */ 106 static DEFINE_MUTEX(psmouse_mutex); 107 108 static struct workqueue_struct *kpsmoused_wq; 109 110 struct psmouse_protocol { 111 enum psmouse_type type; 112 bool maxproto; 113 const char *name; 114 const char *alias; 115 int (*detect)(struct psmouse *, bool); 116 int (*init)(struct psmouse *); 117 }; 118 119 /* 120 * psmouse_process_byte() analyzes the PS/2 data stream and reports 121 * relevant events to the input module once full packet has arrived. 122 */ 123 124 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 125 { 126 struct input_dev *dev = psmouse->dev; 127 unsigned char *packet = psmouse->packet; 128 129 if (psmouse->pktcnt < psmouse->pktsize) 130 return PSMOUSE_GOOD_DATA; 131 132 /* 133 * Full packet accumulated, process it 134 */ 135 136 /* 137 * Scroll wheel on IntelliMice, scroll buttons on NetMice 138 */ 139 140 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 141 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 142 143 /* 144 * Scroll wheel and buttons on IntelliMouse Explorer 145 */ 146 147 if (psmouse->type == PSMOUSE_IMEX) { 148 switch (packet[3] & 0xC0) { 149 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 150 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 151 break; 152 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 153 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 154 break; 155 case 0x00: 156 case 0xC0: 157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 158 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 159 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 160 break; 161 } 162 } 163 164 /* 165 * Extra buttons on Genius NewNet 3D 166 */ 167 168 if (psmouse->type == PSMOUSE_GENPS) { 169 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 170 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 171 } 172 173 /* 174 * Extra button on ThinkingMouse 175 */ 176 if (psmouse->type == PSMOUSE_THINKPS) { 177 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 178 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 179 packet[1] |= (packet[0] & 0x40) << 1; 180 } 181 182 /* 183 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 184 * byte. 185 */ 186 if (psmouse->type == PSMOUSE_CORTRON) { 187 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 188 packet[0] |= 0x08; 189 } 190 191 /* 192 * Generic PS/2 Mouse 193 */ 194 195 input_report_key(dev, BTN_LEFT, packet[0] & 1); 196 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 197 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 198 199 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 200 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 201 202 input_sync(dev); 203 204 return PSMOUSE_FULL_PACKET; 205 } 206 207 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 208 unsigned long delay) 209 { 210 queue_delayed_work(kpsmoused_wq, work, delay); 211 } 212 213 /* 214 * __psmouse_set_state() sets new psmouse state and resets all flags. 215 */ 216 217 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 218 { 219 psmouse->state = new_state; 220 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 221 psmouse->ps2dev.flags = 0; 222 psmouse->last = jiffies; 223 } 224 225 226 /* 227 * psmouse_set_state() sets new psmouse state and resets all flags and 228 * counters while holding serio lock so fighting with interrupt handler 229 * is not a concern. 230 */ 231 232 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 233 { 234 serio_pause_rx(psmouse->ps2dev.serio); 235 __psmouse_set_state(psmouse, new_state); 236 serio_continue_rx(psmouse->ps2dev.serio); 237 } 238 239 /* 240 * psmouse_handle_byte() processes one byte of the input data stream 241 * by calling corresponding protocol handler. 242 */ 243 244 static int psmouse_handle_byte(struct psmouse *psmouse) 245 { 246 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 247 248 switch (rc) { 249 case PSMOUSE_BAD_DATA: 250 if (psmouse->state == PSMOUSE_ACTIVATED) { 251 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 252 psmouse->name, psmouse->phys, psmouse->pktcnt); 253 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 254 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 255 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 256 serio_reconnect(psmouse->ps2dev.serio); 257 return -1; 258 } 259 } 260 psmouse->pktcnt = 0; 261 break; 262 263 case PSMOUSE_FULL_PACKET: 264 psmouse->pktcnt = 0; 265 if (psmouse->out_of_sync_cnt) { 266 psmouse->out_of_sync_cnt = 0; 267 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 268 psmouse->name, psmouse->phys); 269 } 270 break; 271 272 case PSMOUSE_GOOD_DATA: 273 break; 274 } 275 return 0; 276 } 277 278 /* 279 * psmouse_interrupt() handles incoming characters, either passing them 280 * for normal processing or gathering them as command response. 281 */ 282 283 static irqreturn_t psmouse_interrupt(struct serio *serio, 284 unsigned char data, unsigned int flags) 285 { 286 struct psmouse *psmouse = serio_get_drvdata(serio); 287 288 if (psmouse->state == PSMOUSE_IGNORE) 289 goto out; 290 291 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 292 if (psmouse->state == PSMOUSE_ACTIVATED) 293 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 294 flags & SERIO_TIMEOUT ? " timeout" : "", 295 flags & SERIO_PARITY ? " bad parity" : ""); 296 ps2_cmd_aborted(&psmouse->ps2dev); 297 goto out; 298 } 299 300 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 301 if (ps2_handle_ack(&psmouse->ps2dev, data)) 302 goto out; 303 304 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 305 if (ps2_handle_response(&psmouse->ps2dev, data)) 306 goto out; 307 308 if (psmouse->state <= PSMOUSE_RESYNCING) 309 goto out; 310 311 if (psmouse->state == PSMOUSE_ACTIVATED && 312 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 313 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 314 psmouse->name, psmouse->phys, psmouse->pktcnt); 315 psmouse->badbyte = psmouse->packet[0]; 316 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 317 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 318 goto out; 319 } 320 321 psmouse->packet[psmouse->pktcnt++] = data; 322 /* 323 * Check if this is a new device announcement (0xAA 0x00) 324 */ 325 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 326 if (psmouse->pktcnt == 1) { 327 psmouse->last = jiffies; 328 goto out; 329 } 330 331 if (psmouse->packet[1] == PSMOUSE_RET_ID || 332 (psmouse->type == PSMOUSE_HGPK && 333 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 334 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 335 serio_reconnect(serio); 336 goto out; 337 } 338 /* 339 * Not a new device, try processing first byte normally 340 */ 341 psmouse->pktcnt = 1; 342 if (psmouse_handle_byte(psmouse)) 343 goto out; 344 345 psmouse->packet[psmouse->pktcnt++] = data; 346 } 347 348 /* 349 * See if we need to force resync because mouse was idle for too long 350 */ 351 if (psmouse->state == PSMOUSE_ACTIVATED && 352 psmouse->pktcnt == 1 && psmouse->resync_time && 353 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 354 psmouse->badbyte = psmouse->packet[0]; 355 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 356 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 357 goto out; 358 } 359 360 psmouse->last = jiffies; 361 psmouse_handle_byte(psmouse); 362 363 out: 364 return IRQ_HANDLED; 365 } 366 367 368 /* 369 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 370 * using sliced syntax, understood by advanced devices, such as Logitech 371 * or Synaptics touchpads. The command is encoded as: 372 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 373 * is the command. 374 */ 375 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 376 { 377 int i; 378 379 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 380 return -1; 381 382 for (i = 6; i >= 0; i -= 2) { 383 unsigned char d = (command >> i) & 3; 384 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 385 return -1; 386 } 387 388 return 0; 389 } 390 391 392 /* 393 * psmouse_reset() resets the mouse into power-on state. 394 */ 395 int psmouse_reset(struct psmouse *psmouse) 396 { 397 unsigned char param[2]; 398 399 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 400 return -1; 401 402 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 403 return -1; 404 405 return 0; 406 } 407 408 409 /* 410 * Genius NetMouse magic init. 411 */ 412 static int genius_detect(struct psmouse *psmouse, bool set_properties) 413 { 414 struct ps2dev *ps2dev = &psmouse->ps2dev; 415 unsigned char param[4]; 416 417 param[0] = 3; 418 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 419 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 420 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 421 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 422 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 423 424 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 425 return -1; 426 427 if (set_properties) { 428 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 429 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 430 __set_bit(BTN_SIDE, psmouse->dev->keybit); 431 __set_bit(REL_WHEEL, psmouse->dev->relbit); 432 433 psmouse->vendor = "Genius"; 434 psmouse->name = "Mouse"; 435 psmouse->pktsize = 4; 436 } 437 438 return 0; 439 } 440 441 /* 442 * IntelliMouse magic init. 443 */ 444 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 445 { 446 struct ps2dev *ps2dev = &psmouse->ps2dev; 447 unsigned char param[2]; 448 449 param[0] = 200; 450 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 451 param[0] = 100; 452 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 453 param[0] = 80; 454 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 455 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 456 457 if (param[0] != 3) 458 return -1; 459 460 if (set_properties) { 461 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 462 __set_bit(REL_WHEEL, psmouse->dev->relbit); 463 464 if (!psmouse->vendor) 465 psmouse->vendor = "Generic"; 466 if (!psmouse->name) 467 psmouse->name = "Wheel Mouse"; 468 psmouse->pktsize = 4; 469 } 470 471 return 0; 472 } 473 474 /* 475 * Try IntelliMouse/Explorer magic init. 476 */ 477 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 478 { 479 struct ps2dev *ps2dev = &psmouse->ps2dev; 480 unsigned char param[2]; 481 482 intellimouse_detect(psmouse, 0); 483 484 param[0] = 200; 485 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 486 param[0] = 200; 487 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 488 param[0] = 80; 489 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 490 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 491 492 if (param[0] != 4) 493 return -1; 494 495 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 496 param[0] = 200; 497 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 498 param[0] = 80; 499 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 500 param[0] = 40; 501 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 502 503 if (set_properties) { 504 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 505 __set_bit(REL_WHEEL, psmouse->dev->relbit); 506 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 507 __set_bit(BTN_SIDE, psmouse->dev->keybit); 508 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 509 510 if (!psmouse->vendor) 511 psmouse->vendor = "Generic"; 512 if (!psmouse->name) 513 psmouse->name = "Explorer Mouse"; 514 psmouse->pktsize = 4; 515 } 516 517 return 0; 518 } 519 520 /* 521 * Kensington ThinkingMouse / ExpertMouse magic init. 522 */ 523 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 524 { 525 struct ps2dev *ps2dev = &psmouse->ps2dev; 526 unsigned char param[2]; 527 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 528 int i; 529 530 param[0] = 10; 531 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 532 param[0] = 0; 533 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 534 for (i = 0; i < ARRAY_SIZE(seq); i++) { 535 param[0] = seq[i]; 536 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 537 } 538 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 539 540 if (param[0] != 2) 541 return -1; 542 543 if (set_properties) { 544 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 545 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 546 547 psmouse->vendor = "Kensington"; 548 psmouse->name = "ThinkingMouse"; 549 } 550 551 return 0; 552 } 553 554 /* 555 * Bare PS/2 protocol "detection". Always succeeds. 556 */ 557 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 558 { 559 if (set_properties) { 560 if (!psmouse->vendor) 561 psmouse->vendor = "Generic"; 562 if (!psmouse->name) 563 psmouse->name = "Mouse"; 564 565 /* 566 * We have no way of figuring true number of buttons so let's 567 * assume that the device has 3. 568 */ 569 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 570 } 571 572 return 0; 573 } 574 575 /* 576 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 577 * must be forced by sysfs protocol writing. 578 */ 579 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 580 { 581 if (set_properties) { 582 psmouse->vendor = "Cortron"; 583 psmouse->name = "PS/2 Trackball"; 584 585 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 586 __set_bit(BTN_SIDE, psmouse->dev->keybit); 587 } 588 589 return 0; 590 } 591 592 /* 593 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 594 * the mouse may have. 595 */ 596 597 static int psmouse_extensions(struct psmouse *psmouse, 598 unsigned int max_proto, bool set_properties) 599 { 600 bool synaptics_hardware = false; 601 602 /* 603 * We always check for lifebook because it does not disturb mouse 604 * (it only checks DMI information). 605 */ 606 if (lifebook_detect(psmouse, set_properties) == 0) { 607 if (max_proto > PSMOUSE_IMEX) { 608 if (!set_properties || lifebook_init(psmouse) == 0) 609 return PSMOUSE_LIFEBOOK; 610 } 611 } 612 613 /* 614 * Try Kensington ThinkingMouse (we try first, because synaptics probe 615 * upsets the thinkingmouse). 616 */ 617 618 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 619 return PSMOUSE_THINKPS; 620 621 /* 622 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 623 * support is disabled in config - we need to know if it is synaptics so we 624 * can reset it properly after probing for intellimouse. 625 */ 626 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 627 synaptics_hardware = true; 628 629 if (max_proto > PSMOUSE_IMEX) { 630 if (!set_properties || synaptics_init(psmouse) == 0) 631 return PSMOUSE_SYNAPTICS; 632 /* 633 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 634 * Unfortunately Logitech/Genius probes confuse some firmware versions so 635 * we'll have to skip them. 636 */ 637 max_proto = PSMOUSE_IMEX; 638 } 639 /* 640 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 641 */ 642 synaptics_reset(psmouse); 643 } 644 645 /* 646 * Try ALPS TouchPad 647 */ 648 if (max_proto > PSMOUSE_IMEX) { 649 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 650 if (alps_detect(psmouse, set_properties) == 0) { 651 if (!set_properties || alps_init(psmouse) == 0) 652 return PSMOUSE_ALPS; 653 /* 654 * Init failed, try basic relative protocols 655 */ 656 max_proto = PSMOUSE_IMEX; 657 } 658 } 659 660 /* 661 * Try OLPC HGPK touchpad. 662 */ 663 if (max_proto > PSMOUSE_IMEX && 664 hgpk_detect(psmouse, set_properties) == 0) { 665 if (!set_properties || hgpk_init(psmouse) == 0) 666 return PSMOUSE_HGPK; 667 /* 668 * Init failed, try basic relative protocols 669 */ 670 max_proto = PSMOUSE_IMEX; 671 } 672 673 /* 674 * Try Elantech touchpad. 675 */ 676 if (max_proto > PSMOUSE_IMEX && 677 elantech_detect(psmouse, set_properties) == 0) { 678 if (!set_properties || elantech_init(psmouse) == 0) 679 return PSMOUSE_ELANTECH; 680 /* 681 * Init failed, try basic relative protocols 682 */ 683 max_proto = PSMOUSE_IMEX; 684 } 685 686 /* 687 * Try Finger Sensing Pad 688 */ 689 if (max_proto > PSMOUSE_IMEX) { 690 if (fsp_detect(psmouse, set_properties) == 0) { 691 if (!set_properties || fsp_init(psmouse) == 0) 692 return PSMOUSE_FSP; 693 /* 694 * Init failed, try basic relative protocols 695 */ 696 max_proto = PSMOUSE_IMEX; 697 } 698 } 699 700 if (max_proto > PSMOUSE_IMEX) { 701 if (genius_detect(psmouse, set_properties) == 0) 702 return PSMOUSE_GENPS; 703 704 if (ps2pp_init(psmouse, set_properties) == 0) 705 return PSMOUSE_PS2PP; 706 707 if (trackpoint_detect(psmouse, set_properties) == 0) 708 return PSMOUSE_TRACKPOINT; 709 710 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 711 return PSMOUSE_TOUCHKIT_PS2; 712 } 713 714 /* 715 * Reset to defaults in case the device got confused by extended 716 * protocol probes. Note that we follow up with full reset because 717 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 718 */ 719 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 720 psmouse_reset(psmouse); 721 722 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 723 return PSMOUSE_IMEX; 724 725 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 726 return PSMOUSE_IMPS; 727 728 /* 729 * Okay, all failed, we have a standard mouse here. The number of the buttons 730 * is still a question, though. We assume 3. 731 */ 732 ps2bare_detect(psmouse, set_properties); 733 734 if (synaptics_hardware) { 735 /* 736 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 737 * We need to reset the touchpad because if there is a track point on the 738 * pass through port it could get disabled while probing for protocol 739 * extensions. 740 */ 741 psmouse_reset(psmouse); 742 } 743 744 return PSMOUSE_PS2; 745 } 746 747 static const struct psmouse_protocol psmouse_protocols[] = { 748 { 749 .type = PSMOUSE_PS2, 750 .name = "PS/2", 751 .alias = "bare", 752 .maxproto = true, 753 .detect = ps2bare_detect, 754 }, 755 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 756 { 757 .type = PSMOUSE_PS2PP, 758 .name = "PS2++", 759 .alias = "logitech", 760 .detect = ps2pp_init, 761 }, 762 #endif 763 { 764 .type = PSMOUSE_THINKPS, 765 .name = "ThinkPS/2", 766 .alias = "thinkps", 767 .detect = thinking_detect, 768 }, 769 { 770 .type = PSMOUSE_GENPS, 771 .name = "GenPS/2", 772 .alias = "genius", 773 .detect = genius_detect, 774 }, 775 { 776 .type = PSMOUSE_IMPS, 777 .name = "ImPS/2", 778 .alias = "imps", 779 .maxproto = true, 780 .detect = intellimouse_detect, 781 }, 782 { 783 .type = PSMOUSE_IMEX, 784 .name = "ImExPS/2", 785 .alias = "exps", 786 .maxproto = true, 787 .detect = im_explorer_detect, 788 }, 789 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 790 { 791 .type = PSMOUSE_SYNAPTICS, 792 .name = "SynPS/2", 793 .alias = "synaptics", 794 .detect = synaptics_detect, 795 .init = synaptics_init, 796 }, 797 #endif 798 #ifdef CONFIG_MOUSE_PS2_ALPS 799 { 800 .type = PSMOUSE_ALPS, 801 .name = "AlpsPS/2", 802 .alias = "alps", 803 .detect = alps_detect, 804 .init = alps_init, 805 }, 806 #endif 807 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 808 { 809 .type = PSMOUSE_LIFEBOOK, 810 .name = "LBPS/2", 811 .alias = "lifebook", 812 .init = lifebook_init, 813 }, 814 #endif 815 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 816 { 817 .type = PSMOUSE_TRACKPOINT, 818 .name = "TPPS/2", 819 .alias = "trackpoint", 820 .detect = trackpoint_detect, 821 }, 822 #endif 823 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 824 { 825 .type = PSMOUSE_TOUCHKIT_PS2, 826 .name = "touchkitPS/2", 827 .alias = "touchkit", 828 .detect = touchkit_ps2_detect, 829 }, 830 #endif 831 #ifdef CONFIG_MOUSE_PS2_OLPC 832 { 833 .type = PSMOUSE_HGPK, 834 .name = "OLPC HGPK", 835 .alias = "hgpk", 836 .detect = hgpk_detect, 837 }, 838 #endif 839 #ifdef CONFIG_MOUSE_PS2_ELANTECH 840 { 841 .type = PSMOUSE_ELANTECH, 842 .name = "ETPS/2", 843 .alias = "elantech", 844 .detect = elantech_detect, 845 .init = elantech_init, 846 }, 847 #endif 848 #ifdef CONFIG_MOUSE_PS2_SENTELIC 849 { 850 .type = PSMOUSE_FSP, 851 .name = "FSPPS/2", 852 .alias = "fsp", 853 .detect = fsp_detect, 854 .init = fsp_init, 855 }, 856 #endif 857 { 858 .type = PSMOUSE_CORTRON, 859 .name = "CortronPS/2", 860 .alias = "cortps", 861 .detect = cortron_detect, 862 }, 863 { 864 .type = PSMOUSE_AUTO, 865 .name = "auto", 866 .alias = "any", 867 .maxproto = true, 868 }, 869 }; 870 871 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 872 { 873 int i; 874 875 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 876 if (psmouse_protocols[i].type == type) 877 return &psmouse_protocols[i]; 878 879 WARN_ON(1); 880 return &psmouse_protocols[0]; 881 } 882 883 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 884 { 885 const struct psmouse_protocol *p; 886 int i; 887 888 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 889 p = &psmouse_protocols[i]; 890 891 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 892 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 893 return &psmouse_protocols[i]; 894 } 895 896 return NULL; 897 } 898 899 900 /* 901 * psmouse_probe() probes for a PS/2 mouse. 902 */ 903 904 static int psmouse_probe(struct psmouse *psmouse) 905 { 906 struct ps2dev *ps2dev = &psmouse->ps2dev; 907 unsigned char param[2]; 908 909 /* 910 * First, we check if it's a mouse. It should send 0x00 or 0x03 911 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 912 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 913 * ID queries, probably due to a firmware bug. 914 */ 915 916 param[0] = 0xa5; 917 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 918 return -1; 919 920 if (param[0] != 0x00 && param[0] != 0x03 && 921 param[0] != 0x04 && param[0] != 0xff) 922 return -1; 923 924 /* 925 * Then we reset and disable the mouse so that it doesn't generate events. 926 */ 927 928 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 929 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 930 931 return 0; 932 } 933 934 /* 935 * Here we set the mouse resolution. 936 */ 937 938 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 939 { 940 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 941 unsigned char p; 942 943 if (resolution == 0 || resolution > 200) 944 resolution = 200; 945 946 p = params[resolution / 50]; 947 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 948 psmouse->resolution = 25 << p; 949 } 950 951 /* 952 * Here we set the mouse report rate. 953 */ 954 955 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 956 { 957 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 958 unsigned char r; 959 int i = 0; 960 961 while (rates[i] > rate) i++; 962 r = rates[i]; 963 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 964 psmouse->rate = r; 965 } 966 967 /* 968 * psmouse_initialize() initializes the mouse to a sane state. 969 */ 970 971 static void psmouse_initialize(struct psmouse *psmouse) 972 { 973 /* 974 * We set the mouse report rate, resolution and scaling. 975 */ 976 977 if (psmouse_max_proto != PSMOUSE_PS2) { 978 psmouse->set_rate(psmouse, psmouse->rate); 979 psmouse->set_resolution(psmouse, psmouse->resolution); 980 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 981 } 982 } 983 984 /* 985 * psmouse_activate() enables the mouse so that we get motion reports from it. 986 */ 987 988 static void psmouse_activate(struct psmouse *psmouse) 989 { 990 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 991 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 992 psmouse->ps2dev.serio->phys); 993 994 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 995 } 996 997 998 /* 999 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 1000 * reports from it unless we explicitly request it. 1001 */ 1002 1003 static void psmouse_deactivate(struct psmouse *psmouse) 1004 { 1005 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1006 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 1007 psmouse->ps2dev.serio->phys); 1008 1009 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1010 } 1011 1012 /* 1013 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 1014 */ 1015 1016 static int psmouse_poll(struct psmouse *psmouse) 1017 { 1018 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1019 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1020 } 1021 1022 1023 /* 1024 * psmouse_resync() attempts to re-validate current protocol. 1025 */ 1026 1027 static void psmouse_resync(struct work_struct *work) 1028 { 1029 struct psmouse *parent = NULL, *psmouse = 1030 container_of(work, struct psmouse, resync_work.work); 1031 struct serio *serio = psmouse->ps2dev.serio; 1032 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1033 bool failed = false, enabled = false; 1034 int i; 1035 1036 mutex_lock(&psmouse_mutex); 1037 1038 if (psmouse->state != PSMOUSE_RESYNCING) 1039 goto out; 1040 1041 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1042 parent = serio_get_drvdata(serio->parent); 1043 psmouse_deactivate(parent); 1044 } 1045 1046 /* 1047 * Some mice don't ACK commands sent while they are in the middle of 1048 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1049 * instead of ps2_command() which would wait for 200ms for an ACK 1050 * that may never come. 1051 * As an additional quirk ALPS touchpads may not only forget to ACK 1052 * disable command but will stop reporting taps, so if we see that 1053 * mouse at least once ACKs disable we will do full reconnect if ACK 1054 * is missing. 1055 */ 1056 psmouse->num_resyncs++; 1057 1058 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1059 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1060 failed = true; 1061 } else 1062 psmouse->acks_disable_command = true; 1063 1064 /* 1065 * Poll the mouse. If it was reset the packet will be shorter than 1066 * psmouse->pktsize and ps2_command will fail. We do not expect and 1067 * do not handle scenario when mouse "upgrades" its protocol while 1068 * disconnected since it would require additional delay. If we ever 1069 * see a mouse that does it we'll adjust the code. 1070 */ 1071 if (!failed) { 1072 if (psmouse->poll(psmouse)) 1073 failed = true; 1074 else { 1075 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1076 for (i = 0; i < psmouse->pktsize; i++) { 1077 psmouse->pktcnt++; 1078 rc = psmouse->protocol_handler(psmouse); 1079 if (rc != PSMOUSE_GOOD_DATA) 1080 break; 1081 } 1082 if (rc != PSMOUSE_FULL_PACKET) 1083 failed = true; 1084 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1085 } 1086 } 1087 /* 1088 * Now try to enable mouse. We try to do that even if poll failed and also 1089 * repeat our attempts 5 times, otherwise we may be left out with disabled 1090 * mouse. 1091 */ 1092 for (i = 0; i < 5; i++) { 1093 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1094 enabled = true; 1095 break; 1096 } 1097 msleep(200); 1098 } 1099 1100 if (!enabled) { 1101 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1102 psmouse->ps2dev.serio->phys); 1103 failed = true; 1104 } 1105 1106 if (failed) { 1107 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1108 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1109 serio_reconnect(serio); 1110 } else 1111 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1112 1113 if (parent) 1114 psmouse_activate(parent); 1115 out: 1116 mutex_unlock(&psmouse_mutex); 1117 } 1118 1119 /* 1120 * psmouse_cleanup() resets the mouse into power-on state. 1121 */ 1122 1123 static void psmouse_cleanup(struct serio *serio) 1124 { 1125 struct psmouse *psmouse = serio_get_drvdata(serio); 1126 struct psmouse *parent = NULL; 1127 1128 mutex_lock(&psmouse_mutex); 1129 1130 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1131 parent = serio_get_drvdata(serio->parent); 1132 psmouse_deactivate(parent); 1133 } 1134 1135 psmouse_deactivate(psmouse); 1136 1137 if (psmouse->cleanup) 1138 psmouse->cleanup(psmouse); 1139 1140 psmouse_reset(psmouse); 1141 1142 /* 1143 * Some boxes, such as HP nx7400, get terribly confused if mouse 1144 * is not fully enabled before suspending/shutting down. 1145 */ 1146 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1147 1148 if (parent) { 1149 if (parent->pt_deactivate) 1150 parent->pt_deactivate(parent); 1151 1152 psmouse_activate(parent); 1153 } 1154 1155 mutex_unlock(&psmouse_mutex); 1156 } 1157 1158 /* 1159 * psmouse_disconnect() closes and frees. 1160 */ 1161 1162 static void psmouse_disconnect(struct serio *serio) 1163 { 1164 struct psmouse *psmouse, *parent = NULL; 1165 1166 psmouse = serio_get_drvdata(serio); 1167 1168 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1169 1170 mutex_lock(&psmouse_mutex); 1171 1172 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1173 1174 /* make sure we don't have a resync in progress */ 1175 mutex_unlock(&psmouse_mutex); 1176 flush_workqueue(kpsmoused_wq); 1177 mutex_lock(&psmouse_mutex); 1178 1179 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1180 parent = serio_get_drvdata(serio->parent); 1181 psmouse_deactivate(parent); 1182 } 1183 1184 if (psmouse->disconnect) 1185 psmouse->disconnect(psmouse); 1186 1187 if (parent && parent->pt_deactivate) 1188 parent->pt_deactivate(parent); 1189 1190 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1191 1192 serio_close(serio); 1193 serio_set_drvdata(serio, NULL); 1194 input_unregister_device(psmouse->dev); 1195 kfree(psmouse); 1196 1197 if (parent) 1198 psmouse_activate(parent); 1199 1200 mutex_unlock(&psmouse_mutex); 1201 } 1202 1203 static int psmouse_switch_protocol(struct psmouse *psmouse, 1204 const struct psmouse_protocol *proto) 1205 { 1206 struct input_dev *input_dev = psmouse->dev; 1207 1208 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1209 1210 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1211 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = 1212 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 1213 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1214 1215 psmouse->set_rate = psmouse_set_rate; 1216 psmouse->set_resolution = psmouse_set_resolution; 1217 psmouse->poll = psmouse_poll; 1218 psmouse->protocol_handler = psmouse_process_byte; 1219 psmouse->pktsize = 3; 1220 1221 if (proto && (proto->detect || proto->init)) { 1222 if (proto->detect && proto->detect(psmouse, 1) < 0) 1223 return -1; 1224 1225 if (proto->init && proto->init(psmouse) < 0) 1226 return -1; 1227 1228 psmouse->type = proto->type; 1229 } else 1230 psmouse->type = psmouse_extensions(psmouse, 1231 psmouse_max_proto, true); 1232 1233 /* 1234 * If mouse's packet size is 3 there is no point in polling the 1235 * device in hopes to detect protocol reset - we won't get less 1236 * than 3 bytes response anyhow. 1237 */ 1238 if (psmouse->pktsize == 3) 1239 psmouse->resync_time = 0; 1240 1241 /* 1242 * Some smart KVMs fake response to POLL command returning just 1243 * 3 bytes and messing up our resync logic, so if initial poll 1244 * fails we won't try polling the device anymore. Hopefully 1245 * such KVM will maintain initially selected protocol. 1246 */ 1247 if (psmouse->resync_time && psmouse->poll(psmouse)) 1248 psmouse->resync_time = 0; 1249 1250 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1251 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1252 1253 input_dev->name = psmouse->devname; 1254 input_dev->phys = psmouse->phys; 1255 input_dev->id.bustype = BUS_I8042; 1256 input_dev->id.vendor = 0x0002; 1257 input_dev->id.product = psmouse->type; 1258 input_dev->id.version = psmouse->model; 1259 1260 return 0; 1261 } 1262 1263 /* 1264 * psmouse_connect() is a callback from the serio module when 1265 * an unhandled serio port is found. 1266 */ 1267 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1268 { 1269 struct psmouse *psmouse, *parent = NULL; 1270 struct input_dev *input_dev; 1271 int retval = 0, error = -ENOMEM; 1272 1273 mutex_lock(&psmouse_mutex); 1274 1275 /* 1276 * If this is a pass-through port deactivate parent so the device 1277 * connected to this port can be successfully identified 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 = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1285 input_dev = input_allocate_device(); 1286 if (!psmouse || !input_dev) 1287 goto err_free; 1288 1289 ps2_init(&psmouse->ps2dev, serio); 1290 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1291 psmouse->dev = input_dev; 1292 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1293 1294 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1295 1296 serio_set_drvdata(serio, psmouse); 1297 1298 error = serio_open(serio, drv); 1299 if (error) 1300 goto err_clear_drvdata; 1301 1302 if (psmouse_probe(psmouse) < 0) { 1303 error = -ENODEV; 1304 goto err_close_serio; 1305 } 1306 1307 psmouse->rate = psmouse_rate; 1308 psmouse->resolution = psmouse_resolution; 1309 psmouse->resetafter = psmouse_resetafter; 1310 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1311 psmouse->smartscroll = psmouse_smartscroll; 1312 1313 psmouse_switch_protocol(psmouse, NULL); 1314 1315 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1316 psmouse_initialize(psmouse); 1317 1318 error = input_register_device(psmouse->dev); 1319 if (error) 1320 goto err_protocol_disconnect; 1321 1322 if (parent && parent->pt_activate) 1323 parent->pt_activate(parent); 1324 1325 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1326 if (error) 1327 goto err_pt_deactivate; 1328 1329 psmouse_activate(psmouse); 1330 1331 out: 1332 /* If this is a pass-through port the parent needs to be re-activated */ 1333 if (parent) 1334 psmouse_activate(parent); 1335 1336 mutex_unlock(&psmouse_mutex); 1337 return retval; 1338 1339 err_pt_deactivate: 1340 if (parent && parent->pt_deactivate) 1341 parent->pt_deactivate(parent); 1342 input_unregister_device(psmouse->dev); 1343 input_dev = NULL; /* so we don't try to free it below */ 1344 err_protocol_disconnect: 1345 if (psmouse->disconnect) 1346 psmouse->disconnect(psmouse); 1347 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1348 err_close_serio: 1349 serio_close(serio); 1350 err_clear_drvdata: 1351 serio_set_drvdata(serio, NULL); 1352 err_free: 1353 input_free_device(input_dev); 1354 kfree(psmouse); 1355 1356 retval = error; 1357 goto out; 1358 } 1359 1360 1361 static int psmouse_reconnect(struct serio *serio) 1362 { 1363 struct psmouse *psmouse = serio_get_drvdata(serio); 1364 struct psmouse *parent = NULL; 1365 struct serio_driver *drv = serio->drv; 1366 int rc = -1; 1367 1368 if (!drv || !psmouse) { 1369 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1370 return -1; 1371 } 1372 1373 mutex_lock(&psmouse_mutex); 1374 1375 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1376 parent = serio_get_drvdata(serio->parent); 1377 psmouse_deactivate(parent); 1378 } 1379 1380 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1381 1382 if (psmouse->reconnect) { 1383 if (psmouse->reconnect(psmouse)) 1384 goto out; 1385 } else if (psmouse_probe(psmouse) < 0 || 1386 psmouse->type != psmouse_extensions(psmouse, 1387 psmouse_max_proto, false)) { 1388 goto out; 1389 } 1390 1391 /* ok, the device type (and capabilities) match the old one, 1392 * we can continue using it, complete intialization 1393 */ 1394 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1395 1396 psmouse_initialize(psmouse); 1397 1398 if (parent && parent->pt_activate) 1399 parent->pt_activate(parent); 1400 1401 psmouse_activate(psmouse); 1402 rc = 0; 1403 1404 out: 1405 /* If this is a pass-through port the parent waits to be activated */ 1406 if (parent) 1407 psmouse_activate(parent); 1408 1409 mutex_unlock(&psmouse_mutex); 1410 return rc; 1411 } 1412 1413 static struct serio_device_id psmouse_serio_ids[] = { 1414 { 1415 .type = SERIO_8042, 1416 .proto = SERIO_ANY, 1417 .id = SERIO_ANY, 1418 .extra = SERIO_ANY, 1419 }, 1420 { 1421 .type = SERIO_PS_PSTHRU, 1422 .proto = SERIO_ANY, 1423 .id = SERIO_ANY, 1424 .extra = SERIO_ANY, 1425 }, 1426 { 0 } 1427 }; 1428 1429 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1430 1431 static struct serio_driver psmouse_drv = { 1432 .driver = { 1433 .name = "psmouse", 1434 }, 1435 .description = DRIVER_DESC, 1436 .id_table = psmouse_serio_ids, 1437 .interrupt = psmouse_interrupt, 1438 .connect = psmouse_connect, 1439 .reconnect = psmouse_reconnect, 1440 .disconnect = psmouse_disconnect, 1441 .cleanup = psmouse_cleanup, 1442 }; 1443 1444 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1445 char *buf) 1446 { 1447 struct serio *serio = to_serio_port(dev); 1448 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1449 struct psmouse *psmouse; 1450 int retval; 1451 1452 retval = serio_pin_driver(serio); 1453 if (retval) 1454 return retval; 1455 1456 if (serio->drv != &psmouse_drv) { 1457 retval = -ENODEV; 1458 goto out; 1459 } 1460 1461 psmouse = serio_get_drvdata(serio); 1462 1463 retval = attr->show(psmouse, attr->data, buf); 1464 1465 out: 1466 serio_unpin_driver(serio); 1467 return retval; 1468 } 1469 1470 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1471 const char *buf, size_t count) 1472 { 1473 struct serio *serio = to_serio_port(dev); 1474 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1475 struct psmouse *psmouse, *parent = NULL; 1476 int retval; 1477 1478 retval = serio_pin_driver(serio); 1479 if (retval) 1480 return retval; 1481 1482 if (serio->drv != &psmouse_drv) { 1483 retval = -ENODEV; 1484 goto out_unpin; 1485 } 1486 1487 retval = mutex_lock_interruptible(&psmouse_mutex); 1488 if (retval) 1489 goto out_unpin; 1490 1491 psmouse = serio_get_drvdata(serio); 1492 1493 if (attr->protect) { 1494 if (psmouse->state == PSMOUSE_IGNORE) { 1495 retval = -ENODEV; 1496 goto out_unlock; 1497 } 1498 1499 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1500 parent = serio_get_drvdata(serio->parent); 1501 psmouse_deactivate(parent); 1502 } 1503 1504 psmouse_deactivate(psmouse); 1505 } 1506 1507 retval = attr->set(psmouse, attr->data, buf, count); 1508 1509 if (attr->protect) { 1510 if (retval != -ENODEV) 1511 psmouse_activate(psmouse); 1512 1513 if (parent) 1514 psmouse_activate(parent); 1515 } 1516 1517 out_unlock: 1518 mutex_unlock(&psmouse_mutex); 1519 out_unpin: 1520 serio_unpin_driver(serio); 1521 return retval; 1522 } 1523 1524 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1525 { 1526 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1527 1528 return sprintf(buf, "%u\n", *field); 1529 } 1530 1531 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1532 { 1533 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1534 unsigned long value; 1535 1536 if (strict_strtoul(buf, 10, &value)) 1537 return -EINVAL; 1538 1539 if ((unsigned int)value != value) 1540 return -EINVAL; 1541 1542 *field = value; 1543 1544 return count; 1545 } 1546 1547 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1548 { 1549 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1550 } 1551 1552 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1553 { 1554 struct serio *serio = psmouse->ps2dev.serio; 1555 struct psmouse *parent = NULL; 1556 struct input_dev *old_dev, *new_dev; 1557 const struct psmouse_protocol *proto, *old_proto; 1558 int error; 1559 int retry = 0; 1560 1561 proto = psmouse_protocol_by_name(buf, count); 1562 if (!proto) 1563 return -EINVAL; 1564 1565 if (psmouse->type == proto->type) 1566 return count; 1567 1568 new_dev = input_allocate_device(); 1569 if (!new_dev) 1570 return -ENOMEM; 1571 1572 while (serio->child) { 1573 if (++retry > 3) { 1574 printk(KERN_WARNING 1575 "psmouse: failed to destroy child port, " 1576 "protocol change aborted.\n"); 1577 input_free_device(new_dev); 1578 return -EIO; 1579 } 1580 1581 mutex_unlock(&psmouse_mutex); 1582 serio_unpin_driver(serio); 1583 serio_unregister_child_port(serio); 1584 serio_pin_driver_uninterruptible(serio); 1585 mutex_lock(&psmouse_mutex); 1586 1587 if (serio->drv != &psmouse_drv) { 1588 input_free_device(new_dev); 1589 return -ENODEV; 1590 } 1591 1592 if (psmouse->type == proto->type) { 1593 input_free_device(new_dev); 1594 return count; /* switched by other thread */ 1595 } 1596 } 1597 1598 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1599 parent = serio_get_drvdata(serio->parent); 1600 if (parent->pt_deactivate) 1601 parent->pt_deactivate(parent); 1602 } 1603 1604 old_dev = psmouse->dev; 1605 old_proto = psmouse_protocol_by_type(psmouse->type); 1606 1607 if (psmouse->disconnect) 1608 psmouse->disconnect(psmouse); 1609 1610 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1611 1612 psmouse->dev = new_dev; 1613 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1614 1615 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1616 psmouse_reset(psmouse); 1617 /* default to PSMOUSE_PS2 */ 1618 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1619 } 1620 1621 psmouse_initialize(psmouse); 1622 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1623 1624 error = input_register_device(psmouse->dev); 1625 if (error) { 1626 if (psmouse->disconnect) 1627 psmouse->disconnect(psmouse); 1628 1629 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1630 input_free_device(new_dev); 1631 psmouse->dev = old_dev; 1632 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1633 psmouse_switch_protocol(psmouse, old_proto); 1634 psmouse_initialize(psmouse); 1635 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1636 1637 return error; 1638 } 1639 1640 input_unregister_device(old_dev); 1641 1642 if (parent && parent->pt_activate) 1643 parent->pt_activate(parent); 1644 1645 return count; 1646 } 1647 1648 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1649 { 1650 unsigned long value; 1651 1652 if (strict_strtoul(buf, 10, &value)) 1653 return -EINVAL; 1654 1655 psmouse->set_rate(psmouse, value); 1656 return count; 1657 } 1658 1659 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1660 { 1661 unsigned long value; 1662 1663 if (strict_strtoul(buf, 10, &value)) 1664 return -EINVAL; 1665 1666 psmouse->set_resolution(psmouse, value); 1667 return count; 1668 } 1669 1670 1671 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1672 { 1673 const struct psmouse_protocol *proto; 1674 1675 if (!val) 1676 return -EINVAL; 1677 1678 proto = psmouse_protocol_by_name(val, strlen(val)); 1679 1680 if (!proto || !proto->maxproto) 1681 return -EINVAL; 1682 1683 *((unsigned int *)kp->arg) = proto->type; 1684 1685 return 0; 1686 } 1687 1688 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1689 { 1690 int type = *((unsigned int *)kp->arg); 1691 1692 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1693 } 1694 1695 static int __init psmouse_init(void) 1696 { 1697 int err; 1698 1699 lifebook_module_init(); 1700 synaptics_module_init(); 1701 1702 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1703 if (!kpsmoused_wq) { 1704 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1705 return -ENOMEM; 1706 } 1707 1708 err = serio_register_driver(&psmouse_drv); 1709 if (err) 1710 destroy_workqueue(kpsmoused_wq); 1711 1712 return err; 1713 } 1714 1715 static void __exit psmouse_exit(void) 1716 { 1717 serio_unregister_driver(&psmouse_drv); 1718 destroy_workqueue(kpsmoused_wq); 1719 } 1720 1721 module_init(psmouse_init); 1722 module_exit(psmouse_exit); 1723