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_EXTRA, psmouse->dev->keybit); 429 __set_bit(BTN_SIDE, psmouse->dev->keybit); 430 __set_bit(REL_WHEEL, psmouse->dev->relbit); 431 432 psmouse->vendor = "Genius"; 433 psmouse->name = "Mouse"; 434 psmouse->pktsize = 4; 435 } 436 437 return 0; 438 } 439 440 /* 441 * IntelliMouse magic init. 442 */ 443 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 444 { 445 struct ps2dev *ps2dev = &psmouse->ps2dev; 446 unsigned char param[2]; 447 448 param[0] = 200; 449 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 450 param[0] = 100; 451 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 452 param[0] = 80; 453 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 454 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 455 456 if (param[0] != 3) 457 return -1; 458 459 if (set_properties) { 460 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 461 __set_bit(REL_WHEEL, psmouse->dev->relbit); 462 463 if (!psmouse->vendor) psmouse->vendor = "Generic"; 464 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 465 psmouse->pktsize = 4; 466 } 467 468 return 0; 469 } 470 471 /* 472 * Try IntelliMouse/Explorer magic init. 473 */ 474 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 475 { 476 struct ps2dev *ps2dev = &psmouse->ps2dev; 477 unsigned char param[2]; 478 479 intellimouse_detect(psmouse, 0); 480 481 param[0] = 200; 482 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 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 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 488 489 if (param[0] != 4) 490 return -1; 491 492 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 493 param[0] = 200; 494 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 495 param[0] = 80; 496 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 497 param[0] = 40; 498 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 499 500 if (set_properties) { 501 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 502 __set_bit(REL_WHEEL, psmouse->dev->relbit); 503 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 504 __set_bit(BTN_SIDE, psmouse->dev->keybit); 505 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 506 507 if (!psmouse->vendor) psmouse->vendor = "Generic"; 508 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 509 psmouse->pktsize = 4; 510 } 511 512 return 0; 513 } 514 515 /* 516 * Kensington ThinkingMouse / ExpertMouse magic init. 517 */ 518 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 519 { 520 struct ps2dev *ps2dev = &psmouse->ps2dev; 521 unsigned char param[2]; 522 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 523 int i; 524 525 param[0] = 10; 526 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 527 param[0] = 0; 528 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 529 for (i = 0; i < ARRAY_SIZE(seq); i++) { 530 param[0] = seq[i]; 531 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 532 } 533 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 534 535 if (param[0] != 2) 536 return -1; 537 538 if (set_properties) { 539 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 540 541 psmouse->vendor = "Kensington"; 542 psmouse->name = "ThinkingMouse"; 543 } 544 545 return 0; 546 } 547 548 /* 549 * Bare PS/2 protocol "detection". Always succeeds. 550 */ 551 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 552 { 553 if (set_properties) { 554 if (!psmouse->vendor) psmouse->vendor = "Generic"; 555 if (!psmouse->name) psmouse->name = "Mouse"; 556 } 557 558 return 0; 559 } 560 561 /* 562 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 563 * must be forced by sysfs protocol writing. 564 */ 565 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 566 { 567 if (set_properties) { 568 psmouse->vendor = "Cortron"; 569 psmouse->name = "PS/2 Trackball"; 570 __set_bit(BTN_SIDE, psmouse->dev->keybit); 571 } 572 573 return 0; 574 } 575 576 /* 577 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 578 * the mouse may have. 579 */ 580 581 static int psmouse_extensions(struct psmouse *psmouse, 582 unsigned int max_proto, bool set_properties) 583 { 584 bool synaptics_hardware = true; 585 586 /* 587 * We always check for lifebook because it does not disturb mouse 588 * (it only checks DMI information). 589 */ 590 if (lifebook_detect(psmouse, set_properties) == 0) { 591 if (max_proto > PSMOUSE_IMEX) { 592 if (!set_properties || lifebook_init(psmouse) == 0) 593 return PSMOUSE_LIFEBOOK; 594 } 595 } 596 597 /* 598 * Try Kensington ThinkingMouse (we try first, because synaptics probe 599 * upsets the thinkingmouse). 600 */ 601 602 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 603 return PSMOUSE_THINKPS; 604 605 /* 606 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 607 * support is disabled in config - we need to know if it is synaptics so we 608 * can reset it properly after probing for intellimouse. 609 */ 610 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 611 synaptics_hardware = true; 612 613 if (max_proto > PSMOUSE_IMEX) { 614 if (!set_properties || synaptics_init(psmouse) == 0) 615 return PSMOUSE_SYNAPTICS; 616 /* 617 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 618 * Unfortunately Logitech/Genius probes confuse some firmware versions so 619 * we'll have to skip them. 620 */ 621 max_proto = PSMOUSE_IMEX; 622 } 623 /* 624 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 625 */ 626 synaptics_reset(psmouse); 627 } 628 629 /* 630 * Try ALPS TouchPad 631 */ 632 if (max_proto > PSMOUSE_IMEX) { 633 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 634 if (alps_detect(psmouse, set_properties) == 0) { 635 if (!set_properties || alps_init(psmouse) == 0) 636 return PSMOUSE_ALPS; 637 /* 638 * Init failed, try basic relative protocols 639 */ 640 max_proto = PSMOUSE_IMEX; 641 } 642 } 643 644 /* 645 * Try OLPC HGPK touchpad. 646 */ 647 if (max_proto > PSMOUSE_IMEX && 648 hgpk_detect(psmouse, set_properties) == 0) { 649 if (!set_properties || hgpk_init(psmouse) == 0) 650 return PSMOUSE_HGPK; 651 /* 652 * Init failed, try basic relative protocols 653 */ 654 max_proto = PSMOUSE_IMEX; 655 } 656 657 /* 658 * Try Elantech touchpad. 659 */ 660 if (max_proto > PSMOUSE_IMEX && 661 elantech_detect(psmouse, set_properties) == 0) { 662 if (!set_properties || elantech_init(psmouse) == 0) 663 return PSMOUSE_ELANTECH; 664 /* 665 * Init failed, try basic relative protocols 666 */ 667 max_proto = PSMOUSE_IMEX; 668 } 669 670 /* 671 * Try Finger Sensing Pad 672 */ 673 if (max_proto > PSMOUSE_IMEX) { 674 if (fsp_detect(psmouse, set_properties) == 0) { 675 if (!set_properties || fsp_init(psmouse) == 0) 676 return PSMOUSE_FSP; 677 /* 678 * Init failed, try basic relative protocols 679 */ 680 max_proto = PSMOUSE_IMEX; 681 } 682 } 683 684 if (max_proto > PSMOUSE_IMEX) { 685 if (genius_detect(psmouse, set_properties) == 0) 686 return PSMOUSE_GENPS; 687 688 if (ps2pp_init(psmouse, set_properties) == 0) 689 return PSMOUSE_PS2PP; 690 691 if (trackpoint_detect(psmouse, set_properties) == 0) 692 return PSMOUSE_TRACKPOINT; 693 694 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 695 return PSMOUSE_TOUCHKIT_PS2; 696 } 697 698 /* 699 * Reset to defaults in case the device got confused by extended 700 * protocol probes. Note that we follow up with full reset because 701 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 702 */ 703 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 704 psmouse_reset(psmouse); 705 706 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 707 return PSMOUSE_IMEX; 708 709 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 710 return PSMOUSE_IMPS; 711 712 /* 713 * Okay, all failed, we have a standard mouse here. The number of the buttons 714 * is still a question, though. We assume 3. 715 */ 716 ps2bare_detect(psmouse, set_properties); 717 718 if (synaptics_hardware) { 719 /* 720 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 721 * We need to reset the touchpad because if there is a track point on the 722 * pass through port it could get disabled while probing for protocol 723 * extensions. 724 */ 725 psmouse_reset(psmouse); 726 } 727 728 return PSMOUSE_PS2; 729 } 730 731 static const struct psmouse_protocol psmouse_protocols[] = { 732 { 733 .type = PSMOUSE_PS2, 734 .name = "PS/2", 735 .alias = "bare", 736 .maxproto = true, 737 .detect = ps2bare_detect, 738 }, 739 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 740 { 741 .type = PSMOUSE_PS2PP, 742 .name = "PS2++", 743 .alias = "logitech", 744 .detect = ps2pp_init, 745 }, 746 #endif 747 { 748 .type = PSMOUSE_THINKPS, 749 .name = "ThinkPS/2", 750 .alias = "thinkps", 751 .detect = thinking_detect, 752 }, 753 { 754 .type = PSMOUSE_GENPS, 755 .name = "GenPS/2", 756 .alias = "genius", 757 .detect = genius_detect, 758 }, 759 { 760 .type = PSMOUSE_IMPS, 761 .name = "ImPS/2", 762 .alias = "imps", 763 .maxproto = true, 764 .detect = intellimouse_detect, 765 }, 766 { 767 .type = PSMOUSE_IMEX, 768 .name = "ImExPS/2", 769 .alias = "exps", 770 .maxproto = true, 771 .detect = im_explorer_detect, 772 }, 773 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 774 { 775 .type = PSMOUSE_SYNAPTICS, 776 .name = "SynPS/2", 777 .alias = "synaptics", 778 .detect = synaptics_detect, 779 .init = synaptics_init, 780 }, 781 #endif 782 #ifdef CONFIG_MOUSE_PS2_ALPS 783 { 784 .type = PSMOUSE_ALPS, 785 .name = "AlpsPS/2", 786 .alias = "alps", 787 .detect = alps_detect, 788 .init = alps_init, 789 }, 790 #endif 791 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 792 { 793 .type = PSMOUSE_LIFEBOOK, 794 .name = "LBPS/2", 795 .alias = "lifebook", 796 .init = lifebook_init, 797 }, 798 #endif 799 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 800 { 801 .type = PSMOUSE_TRACKPOINT, 802 .name = "TPPS/2", 803 .alias = "trackpoint", 804 .detect = trackpoint_detect, 805 }, 806 #endif 807 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 808 { 809 .type = PSMOUSE_TOUCHKIT_PS2, 810 .name = "touchkitPS/2", 811 .alias = "touchkit", 812 .detect = touchkit_ps2_detect, 813 }, 814 #endif 815 #ifdef CONFIG_MOUSE_PS2_OLPC 816 { 817 .type = PSMOUSE_HGPK, 818 .name = "OLPC HGPK", 819 .alias = "hgpk", 820 .detect = hgpk_detect, 821 }, 822 #endif 823 #ifdef CONFIG_MOUSE_PS2_ELANTECH 824 { 825 .type = PSMOUSE_ELANTECH, 826 .name = "ETPS/2", 827 .alias = "elantech", 828 .detect = elantech_detect, 829 .init = elantech_init, 830 }, 831 #endif 832 #ifdef CONFIG_MOUSE_PS2_SENTELIC 833 { 834 .type = PSMOUSE_FSP, 835 .name = "FSPPS/2", 836 .alias = "fsp", 837 .detect = fsp_detect, 838 .init = fsp_init, 839 }, 840 #endif 841 { 842 .type = PSMOUSE_CORTRON, 843 .name = "CortronPS/2", 844 .alias = "cortps", 845 .detect = cortron_detect, 846 }, 847 { 848 .type = PSMOUSE_AUTO, 849 .name = "auto", 850 .alias = "any", 851 .maxproto = true, 852 }, 853 }; 854 855 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 856 { 857 int i; 858 859 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 860 if (psmouse_protocols[i].type == type) 861 return &psmouse_protocols[i]; 862 863 WARN_ON(1); 864 return &psmouse_protocols[0]; 865 } 866 867 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 868 { 869 const struct psmouse_protocol *p; 870 int i; 871 872 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 873 p = &psmouse_protocols[i]; 874 875 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 876 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 877 return &psmouse_protocols[i]; 878 } 879 880 return NULL; 881 } 882 883 884 /* 885 * psmouse_probe() probes for a PS/2 mouse. 886 */ 887 888 static int psmouse_probe(struct psmouse *psmouse) 889 { 890 struct ps2dev *ps2dev = &psmouse->ps2dev; 891 unsigned char param[2]; 892 893 /* 894 * First, we check if it's a mouse. It should send 0x00 or 0x03 895 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 896 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 897 * ID queries, probably due to a firmware bug. 898 */ 899 900 param[0] = 0xa5; 901 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 902 return -1; 903 904 if (param[0] != 0x00 && param[0] != 0x03 && 905 param[0] != 0x04 && param[0] != 0xff) 906 return -1; 907 908 /* 909 * Then we reset and disable the mouse so that it doesn't generate events. 910 */ 911 912 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 913 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 914 915 return 0; 916 } 917 918 /* 919 * Here we set the mouse resolution. 920 */ 921 922 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 923 { 924 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 925 unsigned char p; 926 927 if (resolution == 0 || resolution > 200) 928 resolution = 200; 929 930 p = params[resolution / 50]; 931 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 932 psmouse->resolution = 25 << p; 933 } 934 935 /* 936 * Here we set the mouse report rate. 937 */ 938 939 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 940 { 941 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 942 unsigned char r; 943 int i = 0; 944 945 while (rates[i] > rate) i++; 946 r = rates[i]; 947 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 948 psmouse->rate = r; 949 } 950 951 /* 952 * psmouse_initialize() initializes the mouse to a sane state. 953 */ 954 955 static void psmouse_initialize(struct psmouse *psmouse) 956 { 957 /* 958 * We set the mouse report rate, resolution and scaling. 959 */ 960 961 if (psmouse_max_proto != PSMOUSE_PS2) { 962 psmouse->set_rate(psmouse, psmouse->rate); 963 psmouse->set_resolution(psmouse, psmouse->resolution); 964 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 965 } 966 } 967 968 /* 969 * psmouse_activate() enables the mouse so that we get motion reports from it. 970 */ 971 972 static void psmouse_activate(struct psmouse *psmouse) 973 { 974 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 975 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 976 psmouse->ps2dev.serio->phys); 977 978 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 979 } 980 981 982 /* 983 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 984 * reports from it unless we explicitly request it. 985 */ 986 987 static void psmouse_deactivate(struct psmouse *psmouse) 988 { 989 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 990 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 991 psmouse->ps2dev.serio->phys); 992 993 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 994 } 995 996 /* 997 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 998 */ 999 1000 static int psmouse_poll(struct psmouse *psmouse) 1001 { 1002 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1003 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1004 } 1005 1006 1007 /* 1008 * psmouse_resync() attempts to re-validate current protocol. 1009 */ 1010 1011 static void psmouse_resync(struct work_struct *work) 1012 { 1013 struct psmouse *parent = NULL, *psmouse = 1014 container_of(work, struct psmouse, resync_work.work); 1015 struct serio *serio = psmouse->ps2dev.serio; 1016 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1017 bool failed = false, enabled = false; 1018 int i; 1019 1020 mutex_lock(&psmouse_mutex); 1021 1022 if (psmouse->state != PSMOUSE_RESYNCING) 1023 goto out; 1024 1025 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1026 parent = serio_get_drvdata(serio->parent); 1027 psmouse_deactivate(parent); 1028 } 1029 1030 /* 1031 * Some mice don't ACK commands sent while they are in the middle of 1032 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1033 * instead of ps2_command() which would wait for 200ms for an ACK 1034 * that may never come. 1035 * As an additional quirk ALPS touchpads may not only forget to ACK 1036 * disable command but will stop reporting taps, so if we see that 1037 * mouse at least once ACKs disable we will do full reconnect if ACK 1038 * is missing. 1039 */ 1040 psmouse->num_resyncs++; 1041 1042 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1043 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1044 failed = true; 1045 } else 1046 psmouse->acks_disable_command = true; 1047 1048 /* 1049 * Poll the mouse. If it was reset the packet will be shorter than 1050 * psmouse->pktsize and ps2_command will fail. We do not expect and 1051 * do not handle scenario when mouse "upgrades" its protocol while 1052 * disconnected since it would require additional delay. If we ever 1053 * see a mouse that does it we'll adjust the code. 1054 */ 1055 if (!failed) { 1056 if (psmouse->poll(psmouse)) 1057 failed = true; 1058 else { 1059 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1060 for (i = 0; i < psmouse->pktsize; i++) { 1061 psmouse->pktcnt++; 1062 rc = psmouse->protocol_handler(psmouse); 1063 if (rc != PSMOUSE_GOOD_DATA) 1064 break; 1065 } 1066 if (rc != PSMOUSE_FULL_PACKET) 1067 failed = true; 1068 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1069 } 1070 } 1071 /* 1072 * Now try to enable mouse. We try to do that even if poll failed and also 1073 * repeat our attempts 5 times, otherwise we may be left out with disabled 1074 * mouse. 1075 */ 1076 for (i = 0; i < 5; i++) { 1077 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1078 enabled = true; 1079 break; 1080 } 1081 msleep(200); 1082 } 1083 1084 if (!enabled) { 1085 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1086 psmouse->ps2dev.serio->phys); 1087 failed = true; 1088 } 1089 1090 if (failed) { 1091 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1092 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1093 serio_reconnect(serio); 1094 } else 1095 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1096 1097 if (parent) 1098 psmouse_activate(parent); 1099 out: 1100 mutex_unlock(&psmouse_mutex); 1101 } 1102 1103 /* 1104 * psmouse_cleanup() resets the mouse into power-on state. 1105 */ 1106 1107 static void psmouse_cleanup(struct serio *serio) 1108 { 1109 struct psmouse *psmouse = serio_get_drvdata(serio); 1110 struct psmouse *parent = NULL; 1111 1112 mutex_lock(&psmouse_mutex); 1113 1114 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1115 parent = serio_get_drvdata(serio->parent); 1116 psmouse_deactivate(parent); 1117 } 1118 1119 psmouse_deactivate(psmouse); 1120 1121 if (psmouse->cleanup) 1122 psmouse->cleanup(psmouse); 1123 1124 psmouse_reset(psmouse); 1125 1126 /* 1127 * Some boxes, such as HP nx7400, get terribly confused if mouse 1128 * is not fully enabled before suspending/shutting down. 1129 */ 1130 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1131 1132 if (parent) { 1133 if (parent->pt_deactivate) 1134 parent->pt_deactivate(parent); 1135 1136 psmouse_activate(parent); 1137 } 1138 1139 mutex_unlock(&psmouse_mutex); 1140 } 1141 1142 /* 1143 * psmouse_disconnect() closes and frees. 1144 */ 1145 1146 static void psmouse_disconnect(struct serio *serio) 1147 { 1148 struct psmouse *psmouse, *parent = NULL; 1149 1150 psmouse = serio_get_drvdata(serio); 1151 1152 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1153 1154 mutex_lock(&psmouse_mutex); 1155 1156 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1157 1158 /* make sure we don't have a resync in progress */ 1159 mutex_unlock(&psmouse_mutex); 1160 flush_workqueue(kpsmoused_wq); 1161 mutex_lock(&psmouse_mutex); 1162 1163 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1164 parent = serio_get_drvdata(serio->parent); 1165 psmouse_deactivate(parent); 1166 } 1167 1168 if (psmouse->disconnect) 1169 psmouse->disconnect(psmouse); 1170 1171 if (parent && parent->pt_deactivate) 1172 parent->pt_deactivate(parent); 1173 1174 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1175 1176 serio_close(serio); 1177 serio_set_drvdata(serio, NULL); 1178 input_unregister_device(psmouse->dev); 1179 kfree(psmouse); 1180 1181 if (parent) 1182 psmouse_activate(parent); 1183 1184 mutex_unlock(&psmouse_mutex); 1185 } 1186 1187 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto) 1188 { 1189 struct input_dev *input_dev = psmouse->dev; 1190 1191 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1192 1193 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1194 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 1195 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 1196 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1197 1198 psmouse->set_rate = psmouse_set_rate; 1199 psmouse->set_resolution = psmouse_set_resolution; 1200 psmouse->poll = psmouse_poll; 1201 psmouse->protocol_handler = psmouse_process_byte; 1202 psmouse->pktsize = 3; 1203 1204 if (proto && (proto->detect || proto->init)) { 1205 if (proto->detect && proto->detect(psmouse, 1) < 0) 1206 return -1; 1207 1208 if (proto->init && proto->init(psmouse) < 0) 1209 return -1; 1210 1211 psmouse->type = proto->type; 1212 } 1213 else 1214 psmouse->type = psmouse_extensions(psmouse, 1215 psmouse_max_proto, true); 1216 1217 /* 1218 * If mouse's packet size is 3 there is no point in polling the 1219 * device in hopes to detect protocol reset - we won't get less 1220 * than 3 bytes response anyhow. 1221 */ 1222 if (psmouse->pktsize == 3) 1223 psmouse->resync_time = 0; 1224 1225 /* 1226 * Some smart KVMs fake response to POLL command returning just 1227 * 3 bytes and messing up our resync logic, so if initial poll 1228 * fails we won't try polling the device anymore. Hopefully 1229 * such KVM will maintain initially selected protocol. 1230 */ 1231 if (psmouse->resync_time && psmouse->poll(psmouse)) 1232 psmouse->resync_time = 0; 1233 1234 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1235 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1236 1237 input_dev->name = psmouse->devname; 1238 input_dev->phys = psmouse->phys; 1239 input_dev->id.bustype = BUS_I8042; 1240 input_dev->id.vendor = 0x0002; 1241 input_dev->id.product = psmouse->type; 1242 input_dev->id.version = psmouse->model; 1243 1244 return 0; 1245 } 1246 1247 /* 1248 * psmouse_connect() is a callback from the serio module when 1249 * an unhandled serio port is found. 1250 */ 1251 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1252 { 1253 struct psmouse *psmouse, *parent = NULL; 1254 struct input_dev *input_dev; 1255 int retval = 0, error = -ENOMEM; 1256 1257 mutex_lock(&psmouse_mutex); 1258 1259 /* 1260 * If this is a pass-through port deactivate parent so the device 1261 * connected to this port can be successfully identified 1262 */ 1263 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1264 parent = serio_get_drvdata(serio->parent); 1265 psmouse_deactivate(parent); 1266 } 1267 1268 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1269 input_dev = input_allocate_device(); 1270 if (!psmouse || !input_dev) 1271 goto err_free; 1272 1273 ps2_init(&psmouse->ps2dev, serio); 1274 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1275 psmouse->dev = input_dev; 1276 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1277 1278 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1279 1280 serio_set_drvdata(serio, psmouse); 1281 1282 error = serio_open(serio, drv); 1283 if (error) 1284 goto err_clear_drvdata; 1285 1286 if (psmouse_probe(psmouse) < 0) { 1287 error = -ENODEV; 1288 goto err_close_serio; 1289 } 1290 1291 psmouse->rate = psmouse_rate; 1292 psmouse->resolution = psmouse_resolution; 1293 psmouse->resetafter = psmouse_resetafter; 1294 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1295 psmouse->smartscroll = psmouse_smartscroll; 1296 1297 psmouse_switch_protocol(psmouse, NULL); 1298 1299 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1300 psmouse_initialize(psmouse); 1301 1302 error = input_register_device(psmouse->dev); 1303 if (error) 1304 goto err_protocol_disconnect; 1305 1306 if (parent && parent->pt_activate) 1307 parent->pt_activate(parent); 1308 1309 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1310 if (error) 1311 goto err_pt_deactivate; 1312 1313 psmouse_activate(psmouse); 1314 1315 out: 1316 /* If this is a pass-through port the parent needs to be re-activated */ 1317 if (parent) 1318 psmouse_activate(parent); 1319 1320 mutex_unlock(&psmouse_mutex); 1321 return retval; 1322 1323 err_pt_deactivate: 1324 if (parent && parent->pt_deactivate) 1325 parent->pt_deactivate(parent); 1326 input_unregister_device(psmouse->dev); 1327 input_dev = NULL; /* so we don't try to free it below */ 1328 err_protocol_disconnect: 1329 if (psmouse->disconnect) 1330 psmouse->disconnect(psmouse); 1331 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1332 err_close_serio: 1333 serio_close(serio); 1334 err_clear_drvdata: 1335 serio_set_drvdata(serio, NULL); 1336 err_free: 1337 input_free_device(input_dev); 1338 kfree(psmouse); 1339 1340 retval = error; 1341 goto out; 1342 } 1343 1344 1345 static int psmouse_reconnect(struct serio *serio) 1346 { 1347 struct psmouse *psmouse = serio_get_drvdata(serio); 1348 struct psmouse *parent = NULL; 1349 struct serio_driver *drv = serio->drv; 1350 int rc = -1; 1351 1352 if (!drv || !psmouse) { 1353 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1354 return -1; 1355 } 1356 1357 mutex_lock(&psmouse_mutex); 1358 1359 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1360 parent = serio_get_drvdata(serio->parent); 1361 psmouse_deactivate(parent); 1362 } 1363 1364 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1365 1366 if (psmouse->reconnect) { 1367 if (psmouse->reconnect(psmouse)) 1368 goto out; 1369 } else if (psmouse_probe(psmouse) < 0 || 1370 psmouse->type != psmouse_extensions(psmouse, 1371 psmouse_max_proto, false)) { 1372 goto out; 1373 } 1374 1375 /* ok, the device type (and capabilities) match the old one, 1376 * we can continue using it, complete intialization 1377 */ 1378 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1379 1380 psmouse_initialize(psmouse); 1381 1382 if (parent && parent->pt_activate) 1383 parent->pt_activate(parent); 1384 1385 psmouse_activate(psmouse); 1386 rc = 0; 1387 1388 out: 1389 /* If this is a pass-through port the parent waits to be activated */ 1390 if (parent) 1391 psmouse_activate(parent); 1392 1393 mutex_unlock(&psmouse_mutex); 1394 return rc; 1395 } 1396 1397 static struct serio_device_id psmouse_serio_ids[] = { 1398 { 1399 .type = SERIO_8042, 1400 .proto = SERIO_ANY, 1401 .id = SERIO_ANY, 1402 .extra = SERIO_ANY, 1403 }, 1404 { 1405 .type = SERIO_PS_PSTHRU, 1406 .proto = SERIO_ANY, 1407 .id = SERIO_ANY, 1408 .extra = SERIO_ANY, 1409 }, 1410 { 0 } 1411 }; 1412 1413 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1414 1415 static struct serio_driver psmouse_drv = { 1416 .driver = { 1417 .name = "psmouse", 1418 }, 1419 .description = DRIVER_DESC, 1420 .id_table = psmouse_serio_ids, 1421 .interrupt = psmouse_interrupt, 1422 .connect = psmouse_connect, 1423 .reconnect = psmouse_reconnect, 1424 .disconnect = psmouse_disconnect, 1425 .cleanup = psmouse_cleanup, 1426 }; 1427 1428 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1429 char *buf) 1430 { 1431 struct serio *serio = to_serio_port(dev); 1432 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1433 struct psmouse *psmouse; 1434 int retval; 1435 1436 retval = serio_pin_driver(serio); 1437 if (retval) 1438 return retval; 1439 1440 if (serio->drv != &psmouse_drv) { 1441 retval = -ENODEV; 1442 goto out; 1443 } 1444 1445 psmouse = serio_get_drvdata(serio); 1446 1447 retval = attr->show(psmouse, attr->data, buf); 1448 1449 out: 1450 serio_unpin_driver(serio); 1451 return retval; 1452 } 1453 1454 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1455 const char *buf, size_t count) 1456 { 1457 struct serio *serio = to_serio_port(dev); 1458 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1459 struct psmouse *psmouse, *parent = NULL; 1460 int retval; 1461 1462 retval = serio_pin_driver(serio); 1463 if (retval) 1464 return retval; 1465 1466 if (serio->drv != &psmouse_drv) { 1467 retval = -ENODEV; 1468 goto out_unpin; 1469 } 1470 1471 retval = mutex_lock_interruptible(&psmouse_mutex); 1472 if (retval) 1473 goto out_unpin; 1474 1475 psmouse = serio_get_drvdata(serio); 1476 1477 if (attr->protect) { 1478 if (psmouse->state == PSMOUSE_IGNORE) { 1479 retval = -ENODEV; 1480 goto out_unlock; 1481 } 1482 1483 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1484 parent = serio_get_drvdata(serio->parent); 1485 psmouse_deactivate(parent); 1486 } 1487 1488 psmouse_deactivate(psmouse); 1489 } 1490 1491 retval = attr->set(psmouse, attr->data, buf, count); 1492 1493 if (attr->protect) { 1494 if (retval != -ENODEV) 1495 psmouse_activate(psmouse); 1496 1497 if (parent) 1498 psmouse_activate(parent); 1499 } 1500 1501 out_unlock: 1502 mutex_unlock(&psmouse_mutex); 1503 out_unpin: 1504 serio_unpin_driver(serio); 1505 return retval; 1506 } 1507 1508 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1509 { 1510 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1511 1512 return sprintf(buf, "%u\n", *field); 1513 } 1514 1515 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1516 { 1517 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1518 unsigned long value; 1519 1520 if (strict_strtoul(buf, 10, &value)) 1521 return -EINVAL; 1522 1523 if ((unsigned int)value != value) 1524 return -EINVAL; 1525 1526 *field = value; 1527 1528 return count; 1529 } 1530 1531 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1532 { 1533 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1534 } 1535 1536 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1537 { 1538 struct serio *serio = psmouse->ps2dev.serio; 1539 struct psmouse *parent = NULL; 1540 struct input_dev *old_dev, *new_dev; 1541 const struct psmouse_protocol *proto, *old_proto; 1542 int error; 1543 int retry = 0; 1544 1545 proto = psmouse_protocol_by_name(buf, count); 1546 if (!proto) 1547 return -EINVAL; 1548 1549 if (psmouse->type == proto->type) 1550 return count; 1551 1552 new_dev = input_allocate_device(); 1553 if (!new_dev) 1554 return -ENOMEM; 1555 1556 while (serio->child) { 1557 if (++retry > 3) { 1558 printk(KERN_WARNING 1559 "psmouse: failed to destroy child port, " 1560 "protocol change aborted.\n"); 1561 input_free_device(new_dev); 1562 return -EIO; 1563 } 1564 1565 mutex_unlock(&psmouse_mutex); 1566 serio_unpin_driver(serio); 1567 serio_unregister_child_port(serio); 1568 serio_pin_driver_uninterruptible(serio); 1569 mutex_lock(&psmouse_mutex); 1570 1571 if (serio->drv != &psmouse_drv) { 1572 input_free_device(new_dev); 1573 return -ENODEV; 1574 } 1575 1576 if (psmouse->type == proto->type) { 1577 input_free_device(new_dev); 1578 return count; /* switched by other thread */ 1579 } 1580 } 1581 1582 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1583 parent = serio_get_drvdata(serio->parent); 1584 if (parent->pt_deactivate) 1585 parent->pt_deactivate(parent); 1586 } 1587 1588 old_dev = psmouse->dev; 1589 old_proto = psmouse_protocol_by_type(psmouse->type); 1590 1591 if (psmouse->disconnect) 1592 psmouse->disconnect(psmouse); 1593 1594 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1595 1596 psmouse->dev = new_dev; 1597 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1598 1599 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1600 psmouse_reset(psmouse); 1601 /* default to PSMOUSE_PS2 */ 1602 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1603 } 1604 1605 psmouse_initialize(psmouse); 1606 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1607 1608 error = input_register_device(psmouse->dev); 1609 if (error) { 1610 if (psmouse->disconnect) 1611 psmouse->disconnect(psmouse); 1612 1613 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1614 input_free_device(new_dev); 1615 psmouse->dev = old_dev; 1616 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1617 psmouse_switch_protocol(psmouse, old_proto); 1618 psmouse_initialize(psmouse); 1619 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1620 1621 return error; 1622 } 1623 1624 input_unregister_device(old_dev); 1625 1626 if (parent && parent->pt_activate) 1627 parent->pt_activate(parent); 1628 1629 return count; 1630 } 1631 1632 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1633 { 1634 unsigned long value; 1635 1636 if (strict_strtoul(buf, 10, &value)) 1637 return -EINVAL; 1638 1639 psmouse->set_rate(psmouse, value); 1640 return count; 1641 } 1642 1643 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1644 { 1645 unsigned long value; 1646 1647 if (strict_strtoul(buf, 10, &value)) 1648 return -EINVAL; 1649 1650 psmouse->set_resolution(psmouse, value); 1651 return count; 1652 } 1653 1654 1655 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1656 { 1657 const struct psmouse_protocol *proto; 1658 1659 if (!val) 1660 return -EINVAL; 1661 1662 proto = psmouse_protocol_by_name(val, strlen(val)); 1663 1664 if (!proto || !proto->maxproto) 1665 return -EINVAL; 1666 1667 *((unsigned int *)kp->arg) = proto->type; 1668 1669 return 0; 1670 } 1671 1672 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1673 { 1674 int type = *((unsigned int *)kp->arg); 1675 1676 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1677 } 1678 1679 static int __init psmouse_init(void) 1680 { 1681 int err; 1682 1683 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1684 if (!kpsmoused_wq) { 1685 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1686 return -ENOMEM; 1687 } 1688 1689 err = serio_register_driver(&psmouse_drv); 1690 if (err) 1691 destroy_workqueue(kpsmoused_wq); 1692 1693 return err; 1694 } 1695 1696 static void __exit psmouse_exit(void) 1697 { 1698 serio_unregister_driver(&psmouse_drv); 1699 destroy_workqueue(kpsmoused_wq); 1700 } 1701 1702 module_init(psmouse_init); 1703 module_exit(psmouse_exit); 1704