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 37MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 38MODULE_DESCRIPTION(DRIVER_DESC); 39MODULE_LICENSE("GPL"); 40 41static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 42static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 43static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 44static struct kernel_param_ops param_ops_proto_abbrev = { 45 .set = psmouse_set_maxproto, 46 .get = psmouse_get_maxproto, 47}; 48#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 49module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 50MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 51 52static unsigned int psmouse_resolution = 200; 53module_param_named(resolution, psmouse_resolution, uint, 0644); 54MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 55 56static unsigned int psmouse_rate = 100; 57module_param_named(rate, psmouse_rate, uint, 0644); 58MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 59 60static unsigned int psmouse_smartscroll = 1; 61module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 62MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 63 64static unsigned int psmouse_resetafter = 5; 65module_param_named(resetafter, psmouse_resetafter, uint, 0644); 66MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 67 68static unsigned int psmouse_resync_time; 69module_param_named(resync_time, psmouse_resync_time, uint, 0644); 70MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 71 72PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 73 NULL, 74 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 75PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 76 (void *) offsetof(struct psmouse, rate), 77 psmouse_show_int_attr, psmouse_attr_set_rate); 78PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 79 (void *) offsetof(struct psmouse, resolution), 80 psmouse_show_int_attr, psmouse_attr_set_resolution); 81PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 82 (void *) offsetof(struct psmouse, resetafter), 83 psmouse_show_int_attr, psmouse_set_int_attr); 84PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 85 (void *) offsetof(struct psmouse, resync_time), 86 psmouse_show_int_attr, psmouse_set_int_attr); 87 88static struct attribute *psmouse_attributes[] = { 89 &psmouse_attr_protocol.dattr.attr, 90 &psmouse_attr_rate.dattr.attr, 91 &psmouse_attr_resolution.dattr.attr, 92 &psmouse_attr_resetafter.dattr.attr, 93 &psmouse_attr_resync_time.dattr.attr, 94 NULL 95}; 96 97static struct attribute_group psmouse_attribute_group = { 98 .attrs = psmouse_attributes, 99}; 100 101/* 102 * psmouse_mutex protects all operations changing state of mouse 103 * (connecting, disconnecting, changing rate or resolution via 104 * sysfs). We could use a per-device semaphore but since there 105 * rarely more than one PS/2 mouse connected and since semaphore 106 * is taken in "slow" paths it is not worth it. 107 */ 108static DEFINE_MUTEX(psmouse_mutex); 109 110static struct workqueue_struct *kpsmoused_wq; 111 112struct psmouse_protocol { 113 enum psmouse_type type; 114 bool maxproto; 115 bool ignore_parity; /* Protocol should ignore parity errors from KBC */ 116 const char *name; 117 const char *alias; 118 int (*detect)(struct psmouse *, bool); 119 int (*init)(struct psmouse *); 120}; 121 122/* 123 * psmouse_process_byte() analyzes the PS/2 data stream and reports 124 * relevant events to the input module once full packet has arrived. 125 */ 126 127static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 128{ 129 struct input_dev *dev = psmouse->dev; 130 unsigned char *packet = psmouse->packet; 131 132 if (psmouse->pktcnt < psmouse->pktsize) 133 return PSMOUSE_GOOD_DATA; 134 135/* 136 * Full packet accumulated, process it 137 */ 138 139/* 140 * Scroll wheel on IntelliMice, scroll buttons on NetMice 141 */ 142 143 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 144 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 145 146/* 147 * Scroll wheel and buttons on IntelliMouse Explorer 148 */ 149 150 if (psmouse->type == PSMOUSE_IMEX) { 151 switch (packet[3] & 0xC0) { 152 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 153 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 154 break; 155 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 156 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 157 break; 158 case 0x00: 159 case 0xC0: 160 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 161 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 162 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 163 break; 164 } 165 } 166 167/* 168 * Extra buttons on Genius NewNet 3D 169 */ 170 171 if (psmouse->type == PSMOUSE_GENPS) { 172 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 173 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 174 } 175 176/* 177 * Extra button on ThinkingMouse 178 */ 179 if (psmouse->type == PSMOUSE_THINKPS) { 180 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 181 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 182 packet[1] |= (packet[0] & 0x40) << 1; 183 } 184 185/* 186 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 187 * byte. 188 */ 189 if (psmouse->type == PSMOUSE_CORTRON) { 190 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 191 packet[0] |= 0x08; 192 } 193 194/* 195 * Generic PS/2 Mouse 196 */ 197 198 input_report_key(dev, BTN_LEFT, packet[0] & 1); 199 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 200 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 201 202 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 203 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 204 205 input_sync(dev); 206 207 return PSMOUSE_FULL_PACKET; 208} 209 210void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 211 unsigned long delay) 212{ 213 queue_delayed_work(kpsmoused_wq, work, delay); 214} 215 216/* 217 * __psmouse_set_state() sets new psmouse state and resets all flags. 218 */ 219 220static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 221{ 222 psmouse->state = new_state; 223 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 224 psmouse->ps2dev.flags = 0; 225 psmouse->last = jiffies; 226} 227 228 229/* 230 * psmouse_set_state() sets new psmouse state and resets all flags and 231 * counters while holding serio lock so fighting with interrupt handler 232 * is not a concern. 233 */ 234 235void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 236{ 237 serio_pause_rx(psmouse->ps2dev.serio); 238 __psmouse_set_state(psmouse, new_state); 239 serio_continue_rx(psmouse->ps2dev.serio); 240} 241 242/* 243 * psmouse_handle_byte() processes one byte of the input data stream 244 * by calling corresponding protocol handler. 245 */ 246 247static int psmouse_handle_byte(struct psmouse *psmouse) 248{ 249 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 250 251 switch (rc) { 252 case PSMOUSE_BAD_DATA: 253 if (psmouse->state == PSMOUSE_ACTIVATED) { 254 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 255 psmouse->name, psmouse->phys, psmouse->pktcnt); 256 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 257 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 258 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 259 serio_reconnect(psmouse->ps2dev.serio); 260 return -1; 261 } 262 } 263 psmouse->pktcnt = 0; 264 break; 265 266 case PSMOUSE_FULL_PACKET: 267 psmouse->pktcnt = 0; 268 if (psmouse->out_of_sync_cnt) { 269 psmouse->out_of_sync_cnt = 0; 270 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 271 psmouse->name, psmouse->phys); 272 } 273 break; 274 275 case PSMOUSE_GOOD_DATA: 276 break; 277 } 278 return 0; 279} 280 281/* 282 * psmouse_interrupt() handles incoming characters, either passing them 283 * for normal processing or gathering them as command response. 284 */ 285 286static irqreturn_t psmouse_interrupt(struct serio *serio, 287 unsigned char data, unsigned int flags) 288{ 289 struct psmouse *psmouse = serio_get_drvdata(serio); 290 291 if (psmouse->state == PSMOUSE_IGNORE) 292 goto out; 293 294 if (unlikely((flags & SERIO_TIMEOUT) || 295 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) { 296 297 if (psmouse->state == PSMOUSE_ACTIVATED) 298 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 299 flags & SERIO_TIMEOUT ? " timeout" : "", 300 flags & SERIO_PARITY ? " bad parity" : ""); 301 ps2_cmd_aborted(&psmouse->ps2dev); 302 goto out; 303 } 304 305 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 306 if (ps2_handle_ack(&psmouse->ps2dev, data)) 307 goto out; 308 309 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 310 if (ps2_handle_response(&psmouse->ps2dev, data)) 311 goto out; 312 313 if (psmouse->state <= PSMOUSE_RESYNCING) 314 goto out; 315 316 if (psmouse->state == PSMOUSE_ACTIVATED && 317 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 318 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 319 psmouse->name, psmouse->phys, psmouse->pktcnt); 320 psmouse->badbyte = psmouse->packet[0]; 321 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 322 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 323 goto out; 324 } 325 326 psmouse->packet[psmouse->pktcnt++] = data; 327/* 328 * Check if this is a new device announcement (0xAA 0x00) 329 */ 330 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 331 if (psmouse->pktcnt == 1) { 332 psmouse->last = jiffies; 333 goto out; 334 } 335 336 if (psmouse->packet[1] == PSMOUSE_RET_ID || 337 (psmouse->type == PSMOUSE_HGPK && 338 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 339 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 340 serio_reconnect(serio); 341 goto out; 342 } 343/* 344 * Not a new device, try processing first byte normally 345 */ 346 psmouse->pktcnt = 1; 347 if (psmouse_handle_byte(psmouse)) 348 goto out; 349 350 psmouse->packet[psmouse->pktcnt++] = data; 351 } 352 353/* 354 * See if we need to force resync because mouse was idle for too long 355 */ 356 if (psmouse->state == PSMOUSE_ACTIVATED && 357 psmouse->pktcnt == 1 && psmouse->resync_time && 358 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 359 psmouse->badbyte = psmouse->packet[0]; 360 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 361 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 362 goto out; 363 } 364 365 psmouse->last = jiffies; 366 psmouse_handle_byte(psmouse); 367 368 out: 369 return IRQ_HANDLED; 370} 371 372 373/* 374 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 375 * using sliced syntax, understood by advanced devices, such as Logitech 376 * or Synaptics touchpads. The command is encoded as: 377 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 378 * is the command. 379 */ 380int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 381{ 382 int i; 383 384 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 385 return -1; 386 387 for (i = 6; i >= 0; i -= 2) { 388 unsigned char d = (command >> i) & 3; 389 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 390 return -1; 391 } 392 393 return 0; 394} 395 396 397/* 398 * psmouse_reset() resets the mouse into power-on state. 399 */ 400int psmouse_reset(struct psmouse *psmouse) 401{ 402 unsigned char param[2]; 403 404 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 405 return -1; 406 407 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 408 return -1; 409 410 return 0; 411} 412 413 414/* 415 * Genius NetMouse magic init. 416 */ 417static int genius_detect(struct psmouse *psmouse, bool set_properties) 418{ 419 struct ps2dev *ps2dev = &psmouse->ps2dev; 420 unsigned char param[4]; 421 422 param[0] = 3; 423 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 424 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 425 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 426 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 427 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 428 429 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 430 return -1; 431 432 if (set_properties) { 433 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 434 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 435 __set_bit(BTN_SIDE, psmouse->dev->keybit); 436 __set_bit(REL_WHEEL, psmouse->dev->relbit); 437 438 psmouse->vendor = "Genius"; 439 psmouse->name = "Mouse"; 440 psmouse->pktsize = 4; 441 } 442 443 return 0; 444} 445 446/* 447 * IntelliMouse magic init. 448 */ 449static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 450{ 451 struct ps2dev *ps2dev = &psmouse->ps2dev; 452 unsigned char param[2]; 453 454 param[0] = 200; 455 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 456 param[0] = 100; 457 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 458 param[0] = 80; 459 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 460 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 461 462 if (param[0] != 3) 463 return -1; 464 465 if (set_properties) { 466 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 467 __set_bit(REL_WHEEL, psmouse->dev->relbit); 468 469 if (!psmouse->vendor) 470 psmouse->vendor = "Generic"; 471 if (!psmouse->name) 472 psmouse->name = "Wheel Mouse"; 473 psmouse->pktsize = 4; 474 } 475 476 return 0; 477} 478 479/* 480 * Try IntelliMouse/Explorer magic init. 481 */ 482static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 483{ 484 struct ps2dev *ps2dev = &psmouse->ps2dev; 485 unsigned char param[2]; 486 487 intellimouse_detect(psmouse, 0); 488 489 param[0] = 200; 490 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 491 param[0] = 200; 492 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 493 param[0] = 80; 494 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 495 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 496 497 if (param[0] != 4) 498 return -1; 499 500/* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 501 param[0] = 200; 502 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 503 param[0] = 80; 504 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 505 param[0] = 40; 506 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 507 508 if (set_properties) { 509 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 510 __set_bit(REL_WHEEL, psmouse->dev->relbit); 511 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 512 __set_bit(BTN_SIDE, psmouse->dev->keybit); 513 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 514 515 if (!psmouse->vendor) 516 psmouse->vendor = "Generic"; 517 if (!psmouse->name) 518 psmouse->name = "Explorer Mouse"; 519 psmouse->pktsize = 4; 520 } 521 522 return 0; 523} 524 525/* 526 * Kensington ThinkingMouse / ExpertMouse magic init. 527 */ 528static int thinking_detect(struct psmouse *psmouse, bool set_properties) 529{ 530 struct ps2dev *ps2dev = &psmouse->ps2dev; 531 unsigned char param[2]; 532 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 533 int i; 534 535 param[0] = 10; 536 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 537 param[0] = 0; 538 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 539 for (i = 0; i < ARRAY_SIZE(seq); i++) { 540 param[0] = seq[i]; 541 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 542 } 543 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 544 545 if (param[0] != 2) 546 return -1; 547 548 if (set_properties) { 549 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 550 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 551 552 psmouse->vendor = "Kensington"; 553 psmouse->name = "ThinkingMouse"; 554 } 555 556 return 0; 557} 558 559/* 560 * Bare PS/2 protocol "detection". Always succeeds. 561 */ 562static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 563{ 564 if (set_properties) { 565 if (!psmouse->vendor) 566 psmouse->vendor = "Generic"; 567 if (!psmouse->name) 568 psmouse->name = "Mouse"; 569 570/* 571 * We have no way of figuring true number of buttons so let's 572 * assume that the device has 3. 573 */ 574 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 575 } 576 577 return 0; 578} 579 580/* 581 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 582 * must be forced by sysfs protocol writing. 583 */ 584static int cortron_detect(struct psmouse *psmouse, bool set_properties) 585{ 586 if (set_properties) { 587 psmouse->vendor = "Cortron"; 588 psmouse->name = "PS/2 Trackball"; 589 590 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 591 __set_bit(BTN_SIDE, psmouse->dev->keybit); 592 } 593 594 return 0; 595} 596 597/* 598 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 599 * the mouse may have. 600 */ 601 602static int psmouse_extensions(struct psmouse *psmouse, 603 unsigned int max_proto, bool set_properties) 604{ 605 bool synaptics_hardware = false; 606 607/* 608 * We always check for lifebook because it does not disturb mouse 609 * (it only checks DMI information). 610 */ 611 if (lifebook_detect(psmouse, set_properties) == 0) { 612 if (max_proto > PSMOUSE_IMEX) { 613 if (!set_properties || lifebook_init(psmouse) == 0) 614 return PSMOUSE_LIFEBOOK; 615 } 616 } 617 618/* 619 * Try Kensington ThinkingMouse (we try first, because synaptics probe 620 * upsets the thinkingmouse). 621 */ 622 623 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 624 return PSMOUSE_THINKPS; 625 626/* 627 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 628 * support is disabled in config - we need to know if it is synaptics so we 629 * can reset it properly after probing for intellimouse. 630 */ 631 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 632 synaptics_hardware = true; 633 634 if (max_proto > PSMOUSE_IMEX) { 635/* 636 * Try activating protocol, but check if support is enabled first, since 637 * we try detecting Synaptics even when protocol is disabled. 638 */ 639 if (synaptics_supported() && 640 (!set_properties || synaptics_init(psmouse) == 0)) { 641 return PSMOUSE_SYNAPTICS; 642 } 643 644/* 645 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 646 * Unfortunately Logitech/Genius probes confuse some firmware versions so 647 * we'll have to skip them. 648 */ 649 max_proto = PSMOUSE_IMEX; 650 } 651/* 652 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 653 */ 654 synaptics_reset(psmouse); 655 } 656 657/* 658 * Try ALPS TouchPad 659 */ 660 if (max_proto > PSMOUSE_IMEX) { 661 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 662 if (alps_detect(psmouse, set_properties) == 0) { 663 if (!set_properties || alps_init(psmouse) == 0) 664 return PSMOUSE_ALPS; 665/* 666 * Init failed, try basic relative protocols 667 */ 668 max_proto = PSMOUSE_IMEX; 669 } 670 } 671 672/* 673 * Try OLPC HGPK touchpad. 674 */ 675 if (max_proto > PSMOUSE_IMEX && 676 hgpk_detect(psmouse, set_properties) == 0) { 677 if (!set_properties || hgpk_init(psmouse) == 0) 678 return PSMOUSE_HGPK; 679/* 680 * Init failed, try basic relative protocols 681 */ 682 max_proto = PSMOUSE_IMEX; 683 } 684 685/* 686 * Try Elantech touchpad. 687 */ 688 if (max_proto > PSMOUSE_IMEX && 689 elantech_detect(psmouse, set_properties) == 0) { 690 if (!set_properties || elantech_init(psmouse) == 0) 691 return PSMOUSE_ELANTECH; 692/* 693 * Init failed, try basic relative protocols 694 */ 695 max_proto = PSMOUSE_IMEX; 696 } 697 698 699 if (max_proto > PSMOUSE_IMEX) { 700 if (genius_detect(psmouse, set_properties) == 0) 701 return PSMOUSE_GENPS; 702 703 if (ps2pp_init(psmouse, set_properties) == 0) 704 return PSMOUSE_PS2PP; 705 706 if (trackpoint_detect(psmouse, set_properties) == 0) 707 return PSMOUSE_TRACKPOINT; 708 709 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 710 return PSMOUSE_TOUCHKIT_PS2; 711 } 712 713/* 714 * Try Finger Sensing Pad. We do it here because its probe upsets 715 * Trackpoint devices (causing TP_READ_ID command to time out). 716 */ 717 if (max_proto > PSMOUSE_IMEX) { 718 if (fsp_detect(psmouse, set_properties) == 0) { 719 if (!set_properties || fsp_init(psmouse) == 0) 720 return PSMOUSE_FSP; 721/* 722 * Init failed, try basic relative protocols 723 */ 724 max_proto = PSMOUSE_IMEX; 725 } 726 } 727 728/* 729 * Reset to defaults in case the device got confused by extended 730 * protocol probes. Note that we follow up with full reset because 731 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 732 */ 733 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 734 psmouse_reset(psmouse); 735 736 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 737 return PSMOUSE_IMEX; 738 739 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 740 return PSMOUSE_IMPS; 741 742/* 743 * Okay, all failed, we have a standard mouse here. The number of the buttons 744 * is still a question, though. We assume 3. 745 */ 746 ps2bare_detect(psmouse, set_properties); 747 748 if (synaptics_hardware) { 749/* 750 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 751 * We need to reset the touchpad because if there is a track point on the 752 * pass through port it could get disabled while probing for protocol 753 * extensions. 754 */ 755 psmouse_reset(psmouse); 756 } 757 758 return PSMOUSE_PS2; 759} 760 761static const struct psmouse_protocol psmouse_protocols[] = { 762 { 763 .type = PSMOUSE_PS2, 764 .name = "PS/2", 765 .alias = "bare", 766 .maxproto = true, 767 .ignore_parity = true, 768 .detect = ps2bare_detect, 769 }, 770#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 771 { 772 .type = PSMOUSE_PS2PP, 773 .name = "PS2++", 774 .alias = "logitech", 775 .detect = ps2pp_init, 776 }, 777#endif 778 { 779 .type = PSMOUSE_THINKPS, 780 .name = "ThinkPS/2", 781 .alias = "thinkps", 782 .detect = thinking_detect, 783 }, 784 { 785 .type = PSMOUSE_GENPS, 786 .name = "GenPS/2", 787 .alias = "genius", 788 .detect = genius_detect, 789 }, 790 { 791 .type = PSMOUSE_IMPS, 792 .name = "ImPS/2", 793 .alias = "imps", 794 .maxproto = true, 795 .ignore_parity = true, 796 .detect = intellimouse_detect, 797 }, 798 { 799 .type = PSMOUSE_IMEX, 800 .name = "ImExPS/2", 801 .alias = "exps", 802 .maxproto = true, 803 .ignore_parity = true, 804 .detect = im_explorer_detect, 805 }, 806#ifdef CONFIG_MOUSE_PS2_SYNAPTICS 807 { 808 .type = PSMOUSE_SYNAPTICS, 809 .name = "SynPS/2", 810 .alias = "synaptics", 811 .detect = synaptics_detect, 812 .init = synaptics_init, 813 }, 814#endif 815#ifdef CONFIG_MOUSE_PS2_ALPS 816 { 817 .type = PSMOUSE_ALPS, 818 .name = "AlpsPS/2", 819 .alias = "alps", 820 .detect = alps_detect, 821 .init = alps_init, 822 }, 823#endif 824#ifdef CONFIG_MOUSE_PS2_LIFEBOOK 825 { 826 .type = PSMOUSE_LIFEBOOK, 827 .name = "LBPS/2", 828 .alias = "lifebook", 829 .init = lifebook_init, 830 }, 831#endif 832#ifdef CONFIG_MOUSE_PS2_TRACKPOINT 833 { 834 .type = PSMOUSE_TRACKPOINT, 835 .name = "TPPS/2", 836 .alias = "trackpoint", 837 .detect = trackpoint_detect, 838 }, 839#endif 840#ifdef CONFIG_MOUSE_PS2_TOUCHKIT 841 { 842 .type = PSMOUSE_TOUCHKIT_PS2, 843 .name = "touchkitPS/2", 844 .alias = "touchkit", 845 .detect = touchkit_ps2_detect, 846 }, 847#endif 848#ifdef CONFIG_MOUSE_PS2_OLPC 849 { 850 .type = PSMOUSE_HGPK, 851 .name = "OLPC HGPK", 852 .alias = "hgpk", 853 .detect = hgpk_detect, 854 }, 855#endif 856#ifdef CONFIG_MOUSE_PS2_ELANTECH 857 { 858 .type = PSMOUSE_ELANTECH, 859 .name = "ETPS/2", 860 .alias = "elantech", 861 .detect = elantech_detect, 862 .init = elantech_init, 863 }, 864#endif 865#ifdef CONFIG_MOUSE_PS2_SENTELIC 866 { 867 .type = PSMOUSE_FSP, 868 .name = "FSPPS/2", 869 .alias = "fsp", 870 .detect = fsp_detect, 871 .init = fsp_init, 872 }, 873#endif 874 { 875 .type = PSMOUSE_CORTRON, 876 .name = "CortronPS/2", 877 .alias = "cortps", 878 .detect = cortron_detect, 879 }, 880 { 881 .type = PSMOUSE_AUTO, 882 .name = "auto", 883 .alias = "any", 884 .maxproto = true, 885 }, 886}; 887 888static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 889{ 890 int i; 891 892 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 893 if (psmouse_protocols[i].type == type) 894 return &psmouse_protocols[i]; 895 896 WARN_ON(1); 897 return &psmouse_protocols[0]; 898} 899 900static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 901{ 902 const struct psmouse_protocol *p; 903 int i; 904 905 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 906 p = &psmouse_protocols[i]; 907 908 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 909 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 910 return &psmouse_protocols[i]; 911 } 912 913 return NULL; 914} 915 916 917/* 918 * psmouse_probe() probes for a PS/2 mouse. 919 */ 920 921static int psmouse_probe(struct psmouse *psmouse) 922{ 923 struct ps2dev *ps2dev = &psmouse->ps2dev; 924 unsigned char param[2]; 925 926/* 927 * First, we check if it's a mouse. It should send 0x00 or 0x03 928 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 929 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 930 * ID queries, probably due to a firmware bug. 931 */ 932 933 param[0] = 0xa5; 934 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 935 return -1; 936 937 if (param[0] != 0x00 && param[0] != 0x03 && 938 param[0] != 0x04 && param[0] != 0xff) 939 return -1; 940 941/* 942 * Then we reset and disable the mouse so that it doesn't generate events. 943 */ 944 945 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 946 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 947 948 return 0; 949} 950 951/* 952 * Here we set the mouse resolution. 953 */ 954 955void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 956{ 957 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 958 unsigned char p; 959 960 if (resolution == 0 || resolution > 200) 961 resolution = 200; 962 963 p = params[resolution / 50]; 964 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 965 psmouse->resolution = 25 << p; 966} 967 968/* 969 * Here we set the mouse report rate. 970 */ 971 972static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 973{ 974 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 975 unsigned char r; 976 int i = 0; 977 978 while (rates[i] > rate) i++; 979 r = rates[i]; 980 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 981 psmouse->rate = r; 982} 983 984/* 985 * psmouse_initialize() initializes the mouse to a sane state. 986 */ 987 988static void psmouse_initialize(struct psmouse *psmouse) 989{ 990/* 991 * We set the mouse report rate, resolution and scaling. 992 */ 993 994 if (psmouse_max_proto != PSMOUSE_PS2) { 995 psmouse->set_rate(psmouse, psmouse->rate); 996 psmouse->set_resolution(psmouse, psmouse->resolution); 997 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 998 } 999} 1000 1001/* 1002 * psmouse_activate() enables the mouse so that we get motion reports from it. 1003 */ 1004 1005static void psmouse_activate(struct psmouse *psmouse) 1006{ 1007 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1008 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 1009 psmouse->ps2dev.serio->phys); 1010 1011 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1012} 1013 1014 1015/* 1016 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 1017 * reports from it unless we explicitly request it. 1018 */ 1019 1020static void psmouse_deactivate(struct psmouse *psmouse) 1021{ 1022 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1023 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 1024 psmouse->ps2dev.serio->phys); 1025 1026 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1027} 1028 1029/* 1030 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 1031 */ 1032 1033static int psmouse_poll(struct psmouse *psmouse) 1034{ 1035 return ps2_command(&psmouse->ps2dev, psmouse->packet, 1036 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 1037} 1038 1039 1040/* 1041 * psmouse_resync() attempts to re-validate current protocol. 1042 */ 1043 1044static void psmouse_resync(struct work_struct *work) 1045{ 1046 struct psmouse *parent = NULL, *psmouse = 1047 container_of(work, struct psmouse, resync_work.work); 1048 struct serio *serio = psmouse->ps2dev.serio; 1049 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1050 bool failed = false, enabled = false; 1051 int i; 1052 1053 mutex_lock(&psmouse_mutex); 1054 1055 if (psmouse->state != PSMOUSE_RESYNCING) 1056 goto out; 1057 1058 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1059 parent = serio_get_drvdata(serio->parent); 1060 psmouse_deactivate(parent); 1061 } 1062 1063/* 1064 * Some mice don't ACK commands sent while they are in the middle of 1065 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1066 * instead of ps2_command() which would wait for 200ms for an ACK 1067 * that may never come. 1068 * As an additional quirk ALPS touchpads may not only forget to ACK 1069 * disable command but will stop reporting taps, so if we see that 1070 * mouse at least once ACKs disable we will do full reconnect if ACK 1071 * is missing. 1072 */ 1073 psmouse->num_resyncs++; 1074 1075 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1076 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1077 failed = true; 1078 } else 1079 psmouse->acks_disable_command = true; 1080 1081/* 1082 * Poll the mouse. If it was reset the packet will be shorter than 1083 * psmouse->pktsize and ps2_command will fail. We do not expect and 1084 * do not handle scenario when mouse "upgrades" its protocol while 1085 * disconnected since it would require additional delay. If we ever 1086 * see a mouse that does it we'll adjust the code. 1087 */ 1088 if (!failed) { 1089 if (psmouse->poll(psmouse)) 1090 failed = true; 1091 else { 1092 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1093 for (i = 0; i < psmouse->pktsize; i++) { 1094 psmouse->pktcnt++; 1095 rc = psmouse->protocol_handler(psmouse); 1096 if (rc != PSMOUSE_GOOD_DATA) 1097 break; 1098 } 1099 if (rc != PSMOUSE_FULL_PACKET) 1100 failed = true; 1101 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1102 } 1103 } 1104/* 1105 * Now try to enable mouse. We try to do that even if poll failed and also 1106 * repeat our attempts 5 times, otherwise we may be left out with disabled 1107 * mouse. 1108 */ 1109 for (i = 0; i < 5; i++) { 1110 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1111 enabled = true; 1112 break; 1113 } 1114 msleep(200); 1115 } 1116 1117 if (!enabled) { 1118 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1119 psmouse->ps2dev.serio->phys); 1120 failed = true; 1121 } 1122 1123 if (failed) { 1124 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1125 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1126 serio_reconnect(serio); 1127 } else 1128 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1129 1130 if (parent) 1131 psmouse_activate(parent); 1132 out: 1133 mutex_unlock(&psmouse_mutex); 1134} 1135 1136/* 1137 * psmouse_cleanup() resets the mouse into power-on state. 1138 */ 1139 1140static void psmouse_cleanup(struct serio *serio) 1141{ 1142 struct psmouse *psmouse = serio_get_drvdata(serio); 1143 struct psmouse *parent = NULL; 1144 1145 mutex_lock(&psmouse_mutex); 1146 1147 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1148 parent = serio_get_drvdata(serio->parent); 1149 psmouse_deactivate(parent); 1150 } 1151 1152 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1153 1154 /* 1155 * Disable stream mode so cleanup routine can proceed undisturbed. 1156 */ 1157 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1158 printk(KERN_WARNING "psmouse.c: Failed to disable mouse on %s\n", 1159 psmouse->ps2dev.serio->phys); 1160 1161 if (psmouse->cleanup) 1162 psmouse->cleanup(psmouse); 1163 1164/* 1165 * Reset the mouse to defaults (bare PS/2 protocol). 1166 */ 1167 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1168 1169/* 1170 * Some boxes, such as HP nx7400, get terribly confused if mouse 1171 * is not fully enabled before suspending/shutting down. 1172 */ 1173 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1174 1175 if (parent) { 1176 if (parent->pt_deactivate) 1177 parent->pt_deactivate(parent); 1178 1179 psmouse_activate(parent); 1180 } 1181 1182 mutex_unlock(&psmouse_mutex); 1183} 1184 1185/* 1186 * psmouse_disconnect() closes and frees. 1187 */ 1188 1189static void psmouse_disconnect(struct serio *serio) 1190{ 1191 struct psmouse *psmouse, *parent = NULL; 1192 1193 psmouse = serio_get_drvdata(serio); 1194 1195 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1196 1197 mutex_lock(&psmouse_mutex); 1198 1199 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1200 1201 /* make sure we don't have a resync in progress */ 1202 mutex_unlock(&psmouse_mutex); 1203 flush_workqueue(kpsmoused_wq); 1204 mutex_lock(&psmouse_mutex); 1205 1206 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1207 parent = serio_get_drvdata(serio->parent); 1208 psmouse_deactivate(parent); 1209 } 1210 1211 if (psmouse->disconnect) 1212 psmouse->disconnect(psmouse); 1213 1214 if (parent && parent->pt_deactivate) 1215 parent->pt_deactivate(parent); 1216 1217 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1218 1219 serio_close(serio); 1220 serio_set_drvdata(serio, NULL); 1221 input_unregister_device(psmouse->dev); 1222 kfree(psmouse); 1223 1224 if (parent) 1225 psmouse_activate(parent); 1226 1227 mutex_unlock(&psmouse_mutex); 1228} 1229 1230static int psmouse_switch_protocol(struct psmouse *psmouse, 1231 const struct psmouse_protocol *proto) 1232{ 1233 const struct psmouse_protocol *selected_proto; 1234 struct input_dev *input_dev = psmouse->dev; 1235 1236 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1237 1238 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1239 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = 1240 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 1241 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1242 1243 psmouse->set_rate = psmouse_set_rate; 1244 psmouse->set_resolution = psmouse_set_resolution; 1245 psmouse->poll = psmouse_poll; 1246 psmouse->protocol_handler = psmouse_process_byte; 1247 psmouse->pktsize = 3; 1248 1249 if (proto && (proto->detect || proto->init)) { 1250 if (proto->detect && proto->detect(psmouse, true) < 0) 1251 return -1; 1252 1253 if (proto->init && proto->init(psmouse) < 0) 1254 return -1; 1255 1256 psmouse->type = proto->type; 1257 selected_proto = proto; 1258 } else { 1259 psmouse->type = psmouse_extensions(psmouse, 1260 psmouse_max_proto, true); 1261 selected_proto = psmouse_protocol_by_type(psmouse->type); 1262 } 1263 1264 psmouse->ignore_parity = selected_proto->ignore_parity; 1265 1266 /* 1267 * If mouse's packet size is 3 there is no point in polling the 1268 * device in hopes to detect protocol reset - we won't get less 1269 * than 3 bytes response anyhow. 1270 */ 1271 if (psmouse->pktsize == 3) 1272 psmouse->resync_time = 0; 1273 1274 /* 1275 * Some smart KVMs fake response to POLL command returning just 1276 * 3 bytes and messing up our resync logic, so if initial poll 1277 * fails we won't try polling the device anymore. Hopefully 1278 * such KVM will maintain initially selected protocol. 1279 */ 1280 if (psmouse->resync_time && psmouse->poll(psmouse)) 1281 psmouse->resync_time = 0; 1282 1283 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1284 selected_proto->name, psmouse->vendor, psmouse->name); 1285 1286 input_dev->name = psmouse->devname; 1287 input_dev->phys = psmouse->phys; 1288 input_dev->id.bustype = BUS_I8042; 1289 input_dev->id.vendor = 0x0002; 1290 input_dev->id.product = psmouse->type; 1291 input_dev->id.version = psmouse->model; 1292 1293 return 0; 1294} 1295 1296/* 1297 * psmouse_connect() is a callback from the serio module when 1298 * an unhandled serio port is found. 1299 */ 1300static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1301{ 1302 struct psmouse *psmouse, *parent = NULL; 1303 struct input_dev *input_dev; 1304 int retval = 0, error = -ENOMEM; 1305 1306 mutex_lock(&psmouse_mutex); 1307 1308 /* 1309 * If this is a pass-through port deactivate parent so the device 1310 * connected to this port can be successfully identified 1311 */ 1312 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1313 parent = serio_get_drvdata(serio->parent); 1314 psmouse_deactivate(parent); 1315 } 1316 1317 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1318 input_dev = input_allocate_device(); 1319 if (!psmouse || !input_dev) 1320 goto err_free; 1321 1322 ps2_init(&psmouse->ps2dev, serio); 1323 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1324 psmouse->dev = input_dev; 1325 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1326 1327 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1328 1329 serio_set_drvdata(serio, psmouse); 1330 1331 error = serio_open(serio, drv); 1332 if (error) 1333 goto err_clear_drvdata; 1334 1335 if (psmouse_probe(psmouse) < 0) { 1336 error = -ENODEV; 1337 goto err_close_serio; 1338 } 1339 1340 psmouse->rate = psmouse_rate; 1341 psmouse->resolution = psmouse_resolution; 1342 psmouse->resetafter = psmouse_resetafter; 1343 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1344 psmouse->smartscroll = psmouse_smartscroll; 1345 1346 psmouse_switch_protocol(psmouse, NULL); 1347 1348 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1349 psmouse_initialize(psmouse); 1350 1351 error = input_register_device(psmouse->dev); 1352 if (error) 1353 goto err_protocol_disconnect; 1354 1355 if (parent && parent->pt_activate) 1356 parent->pt_activate(parent); 1357 1358 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1359 if (error) 1360 goto err_pt_deactivate; 1361 1362 psmouse_activate(psmouse); 1363 1364 out: 1365 /* If this is a pass-through port the parent needs to be re-activated */ 1366 if (parent) 1367 psmouse_activate(parent); 1368 1369 mutex_unlock(&psmouse_mutex); 1370 return retval; 1371 1372 err_pt_deactivate: 1373 if (parent && parent->pt_deactivate) 1374 parent->pt_deactivate(parent); 1375 input_unregister_device(psmouse->dev); 1376 input_dev = NULL; /* so we don't try to free it below */ 1377 err_protocol_disconnect: 1378 if (psmouse->disconnect) 1379 psmouse->disconnect(psmouse); 1380 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1381 err_close_serio: 1382 serio_close(serio); 1383 err_clear_drvdata: 1384 serio_set_drvdata(serio, NULL); 1385 err_free: 1386 input_free_device(input_dev); 1387 kfree(psmouse); 1388 1389 retval = error; 1390 goto out; 1391} 1392 1393 1394static int psmouse_reconnect(struct serio *serio) 1395{ 1396 struct psmouse *psmouse = serio_get_drvdata(serio); 1397 struct psmouse *parent = NULL; 1398 struct serio_driver *drv = serio->drv; 1399 unsigned char type; 1400 int rc = -1; 1401 1402 if (!drv || !psmouse) { 1403 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1404 return -1; 1405 } 1406 1407 mutex_lock(&psmouse_mutex); 1408 1409 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1410 parent = serio_get_drvdata(serio->parent); 1411 psmouse_deactivate(parent); 1412 } 1413 1414 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1415 1416 if (psmouse->reconnect) { 1417 if (psmouse->reconnect(psmouse)) 1418 goto out; 1419 } else { 1420 psmouse_reset(psmouse); 1421 1422 if (psmouse_probe(psmouse) < 0) 1423 goto out; 1424 1425 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1426 if (psmouse->type != type) 1427 goto out; 1428 } 1429 1430 /* ok, the device type (and capabilities) match the old one, 1431 * we can continue using it, complete intialization 1432 */ 1433 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1434 1435 psmouse_initialize(psmouse); 1436 1437 if (parent && parent->pt_activate) 1438 parent->pt_activate(parent); 1439 1440 psmouse_activate(psmouse); 1441 rc = 0; 1442 1443out: 1444 /* If this is a pass-through port the parent waits to be activated */ 1445 if (parent) 1446 psmouse_activate(parent); 1447 1448 mutex_unlock(&psmouse_mutex); 1449 return rc; 1450} 1451 1452static struct serio_device_id psmouse_serio_ids[] = { 1453 { 1454 .type = SERIO_8042, 1455 .proto = SERIO_ANY, 1456 .id = SERIO_ANY, 1457 .extra = SERIO_ANY, 1458 }, 1459 { 1460 .type = SERIO_PS_PSTHRU, 1461 .proto = SERIO_ANY, 1462 .id = SERIO_ANY, 1463 .extra = SERIO_ANY, 1464 }, 1465 { 0 } 1466}; 1467 1468MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1469 1470static struct serio_driver psmouse_drv = { 1471 .driver = { 1472 .name = "psmouse", 1473 }, 1474 .description = DRIVER_DESC, 1475 .id_table = psmouse_serio_ids, 1476 .interrupt = psmouse_interrupt, 1477 .connect = psmouse_connect, 1478 .reconnect = psmouse_reconnect, 1479 .disconnect = psmouse_disconnect, 1480 .cleanup = psmouse_cleanup, 1481}; 1482 1483ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1484 char *buf) 1485{ 1486 struct serio *serio = to_serio_port(dev); 1487 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1488 struct psmouse *psmouse; 1489 1490 psmouse = serio_get_drvdata(serio); 1491 1492 return attr->show(psmouse, attr->data, buf); 1493} 1494 1495ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1496 const char *buf, size_t count) 1497{ 1498 struct serio *serio = to_serio_port(dev); 1499 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1500 struct psmouse *psmouse, *parent = NULL; 1501 int retval; 1502 1503 retval = mutex_lock_interruptible(&psmouse_mutex); 1504 if (retval) 1505 goto out; 1506 1507 psmouse = serio_get_drvdata(serio); 1508 1509 if (attr->protect) { 1510 if (psmouse->state == PSMOUSE_IGNORE) { 1511 retval = -ENODEV; 1512 goto out_unlock; 1513 } 1514 1515 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1516 parent = serio_get_drvdata(serio->parent); 1517 psmouse_deactivate(parent); 1518 } 1519 1520 psmouse_deactivate(psmouse); 1521 } 1522 1523 retval = attr->set(psmouse, attr->data, buf, count); 1524 1525 if (attr->protect) { 1526 if (retval != -ENODEV) 1527 psmouse_activate(psmouse); 1528 1529 if (parent) 1530 psmouse_activate(parent); 1531 } 1532 1533 out_unlock: 1534 mutex_unlock(&psmouse_mutex); 1535 out: 1536 return retval; 1537} 1538 1539static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1540{ 1541 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1542 1543 return sprintf(buf, "%u\n", *field); 1544} 1545 1546static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1547{ 1548 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1549 unsigned long value; 1550 1551 if (strict_strtoul(buf, 10, &value)) 1552 return -EINVAL; 1553 1554 if ((unsigned int)value != value) 1555 return -EINVAL; 1556 1557 *field = value; 1558 1559 return count; 1560} 1561 1562static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1563{ 1564 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1565} 1566 1567static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1568{ 1569 struct serio *serio = psmouse->ps2dev.serio; 1570 struct psmouse *parent = NULL; 1571 struct input_dev *old_dev, *new_dev; 1572 const struct psmouse_protocol *proto, *old_proto; 1573 int error; 1574 int retry = 0; 1575 1576 proto = psmouse_protocol_by_name(buf, count); 1577 if (!proto) 1578 return -EINVAL; 1579 1580 if (psmouse->type == proto->type) 1581 return count; 1582 1583 new_dev = input_allocate_device(); 1584 if (!new_dev) 1585 return -ENOMEM; 1586 1587 while (serio->child) { 1588 if (++retry > 3) { 1589 printk(KERN_WARNING 1590 "psmouse: failed to destroy child port, " 1591 "protocol change aborted.\n"); 1592 input_free_device(new_dev); 1593 return -EIO; 1594 } 1595 1596 mutex_unlock(&psmouse_mutex); 1597 serio_unregister_child_port(serio); 1598 mutex_lock(&psmouse_mutex); 1599 1600 if (serio->drv != &psmouse_drv) { 1601 input_free_device(new_dev); 1602 return -ENODEV; 1603 } 1604 1605 if (psmouse->type == proto->type) { 1606 input_free_device(new_dev); 1607 return count; /* switched by other thread */ 1608 } 1609 } 1610 1611 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1612 parent = serio_get_drvdata(serio->parent); 1613 if (parent->pt_deactivate) 1614 parent->pt_deactivate(parent); 1615 } 1616 1617 old_dev = psmouse->dev; 1618 old_proto = psmouse_protocol_by_type(psmouse->type); 1619 1620 if (psmouse->disconnect) 1621 psmouse->disconnect(psmouse); 1622 1623 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1624 1625 psmouse->dev = new_dev; 1626 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1627 1628 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1629 psmouse_reset(psmouse); 1630 /* default to PSMOUSE_PS2 */ 1631 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1632 } 1633 1634 psmouse_initialize(psmouse); 1635 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1636 1637 error = input_register_device(psmouse->dev); 1638 if (error) { 1639 if (psmouse->disconnect) 1640 psmouse->disconnect(psmouse); 1641 1642 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1643 input_free_device(new_dev); 1644 psmouse->dev = old_dev; 1645 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1646 psmouse_switch_protocol(psmouse, old_proto); 1647 psmouse_initialize(psmouse); 1648 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1649 1650 return error; 1651 } 1652 1653 input_unregister_device(old_dev); 1654 1655 if (parent && parent->pt_activate) 1656 parent->pt_activate(parent); 1657 1658 return count; 1659} 1660 1661static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1662{ 1663 unsigned long value; 1664 1665 if (strict_strtoul(buf, 10, &value)) 1666 return -EINVAL; 1667 1668 psmouse->set_rate(psmouse, value); 1669 return count; 1670} 1671 1672static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1673{ 1674 unsigned long value; 1675 1676 if (strict_strtoul(buf, 10, &value)) 1677 return -EINVAL; 1678 1679 psmouse->set_resolution(psmouse, value); 1680 return count; 1681} 1682 1683 1684static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 1685{ 1686 const struct psmouse_protocol *proto; 1687 1688 if (!val) 1689 return -EINVAL; 1690 1691 proto = psmouse_protocol_by_name(val, strlen(val)); 1692 1693 if (!proto || !proto->maxproto) 1694 return -EINVAL; 1695 1696 *((unsigned int *)kp->arg) = proto->type; 1697 1698 return 0; 1699} 1700 1701static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 1702{ 1703 int type = *((unsigned int *)kp->arg); 1704 1705 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 1706} 1707 1708static int __init psmouse_init(void) 1709{ 1710 int err; 1711 1712 lifebook_module_init(); 1713 synaptics_module_init(); 1714 1715 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1716 if (!kpsmoused_wq) { 1717 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1718 return -ENOMEM; 1719 } 1720 1721 err = serio_register_driver(&psmouse_drv); 1722 if (err) 1723 destroy_workqueue(kpsmoused_wq); 1724 1725 return err; 1726} 1727 1728static void __exit psmouse_exit(void) 1729{ 1730 serio_unregister_driver(&psmouse_drv); 1731 destroy_workqueue(kpsmoused_wq); 1732} 1733 1734module_init(psmouse_init); 1735module_exit(psmouse_exit); 1736