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 34 #define DRIVER_DESC "PS/2 mouse driver" 35 36 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 37 MODULE_DESCRIPTION(DRIVER_DESC); 38 MODULE_LICENSE("GPL"); 39 40 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 41 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 42 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 43 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 44 #define param_set_proto_abbrev psmouse_set_maxproto 45 #define param_get_proto_abbrev psmouse_get_maxproto 46 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 47 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 48 49 static unsigned int psmouse_resolution = 200; 50 module_param_named(resolution, psmouse_resolution, uint, 0644); 51 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 52 53 static unsigned int psmouse_rate = 100; 54 module_param_named(rate, psmouse_rate, uint, 0644); 55 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 56 57 static unsigned int psmouse_smartscroll = 1; 58 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 59 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 60 61 static unsigned int psmouse_resetafter = 5; 62 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 63 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 64 65 static unsigned int psmouse_resync_time; 66 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 67 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 68 69 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 70 NULL, 71 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 72 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 73 (void *) offsetof(struct psmouse, rate), 74 psmouse_show_int_attr, psmouse_attr_set_rate); 75 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 76 (void *) offsetof(struct psmouse, resolution), 77 psmouse_show_int_attr, psmouse_attr_set_resolution); 78 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 79 (void *) offsetof(struct psmouse, resetafter), 80 psmouse_show_int_attr, psmouse_set_int_attr); 81 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 82 (void *) offsetof(struct psmouse, resync_time), 83 psmouse_show_int_attr, psmouse_set_int_attr); 84 85 static struct attribute *psmouse_attributes[] = { 86 &psmouse_attr_protocol.dattr.attr, 87 &psmouse_attr_rate.dattr.attr, 88 &psmouse_attr_resolution.dattr.attr, 89 &psmouse_attr_resetafter.dattr.attr, 90 &psmouse_attr_resync_time.dattr.attr, 91 NULL 92 }; 93 94 static struct attribute_group psmouse_attribute_group = { 95 .attrs = psmouse_attributes, 96 }; 97 98 /* 99 * psmouse_mutex protects all operations changing state of mouse 100 * (connecting, disconnecting, changing rate or resolution via 101 * sysfs). We could use a per-device semaphore but since there 102 * rarely more than one PS/2 mouse connected and since semaphore 103 * is taken in "slow" paths it is not worth it. 104 */ 105 static DEFINE_MUTEX(psmouse_mutex); 106 107 static struct workqueue_struct *kpsmoused_wq; 108 109 struct psmouse_protocol { 110 enum psmouse_type type; 111 const char *name; 112 const char *alias; 113 int maxproto; 114 int (*detect)(struct psmouse *, int); 115 int (*init)(struct psmouse *); 116 }; 117 118 /* 119 * psmouse_process_byte() analyzes the PS/2 data stream and reports 120 * relevant events to the input module once full packet has arrived. 121 */ 122 123 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 124 { 125 struct input_dev *dev = psmouse->dev; 126 unsigned char *packet = psmouse->packet; 127 128 if (psmouse->pktcnt < psmouse->pktsize) 129 return PSMOUSE_GOOD_DATA; 130 131 /* 132 * Full packet accumulated, process it 133 */ 134 135 /* 136 * Scroll wheel on IntelliMice, scroll buttons on NetMice 137 */ 138 139 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 140 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 141 142 /* 143 * Scroll wheel and buttons on IntelliMouse Explorer 144 */ 145 146 if (psmouse->type == PSMOUSE_IMEX) { 147 switch (packet[3] & 0xC0) { 148 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 149 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 150 break; 151 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 152 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 153 break; 154 case 0x00: 155 case 0xC0: 156 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 157 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 158 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 159 break; 160 } 161 } 162 163 /* 164 * Extra buttons on Genius NewNet 3D 165 */ 166 167 if (psmouse->type == PSMOUSE_GENPS) { 168 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 169 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 170 } 171 172 /* 173 * Extra button on ThinkingMouse 174 */ 175 if (psmouse->type == PSMOUSE_THINKPS) { 176 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 177 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 178 packet[1] |= (packet[0] & 0x40) << 1; 179 } 180 181 /* 182 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 183 * byte. 184 */ 185 if (psmouse->type == PSMOUSE_CORTRON) { 186 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 187 packet[0] |= 0x08; 188 } 189 190 /* 191 * Generic PS/2 Mouse 192 */ 193 194 input_report_key(dev, BTN_LEFT, packet[0] & 1); 195 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 196 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 197 198 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 199 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 200 201 input_sync(dev); 202 203 return PSMOUSE_FULL_PACKET; 204 } 205 206 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 207 unsigned long delay) 208 { 209 queue_delayed_work(kpsmoused_wq, work, delay); 210 } 211 212 /* 213 * __psmouse_set_state() sets new psmouse state and resets all flags. 214 */ 215 216 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 217 { 218 psmouse->state = new_state; 219 psmouse->pktcnt = psmouse->out_of_sync = 0; 220 psmouse->ps2dev.flags = 0; 221 psmouse->last = jiffies; 222 } 223 224 225 /* 226 * psmouse_set_state() sets new psmouse state and resets all flags and 227 * counters while holding serio lock so fighting with interrupt handler 228 * is not a concern. 229 */ 230 231 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 232 { 233 serio_pause_rx(psmouse->ps2dev.serio); 234 __psmouse_set_state(psmouse, new_state); 235 serio_continue_rx(psmouse->ps2dev.serio); 236 } 237 238 /* 239 * psmouse_handle_byte() processes one byte of the input data stream 240 * by calling corresponding protocol handler. 241 */ 242 243 static int psmouse_handle_byte(struct psmouse *psmouse) 244 { 245 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 246 247 switch (rc) { 248 case PSMOUSE_BAD_DATA: 249 if (psmouse->state == PSMOUSE_ACTIVATED) { 250 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 251 psmouse->name, psmouse->phys, psmouse->pktcnt); 252 if (++psmouse->out_of_sync == psmouse->resetafter) { 253 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 254 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 255 serio_reconnect(psmouse->ps2dev.serio); 256 return -1; 257 } 258 } 259 psmouse->pktcnt = 0; 260 break; 261 262 case PSMOUSE_FULL_PACKET: 263 psmouse->pktcnt = 0; 264 if (psmouse->out_of_sync) { 265 psmouse->out_of_sync = 0; 266 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 267 psmouse->name, psmouse->phys); 268 } 269 break; 270 271 case PSMOUSE_GOOD_DATA: 272 break; 273 } 274 return 0; 275 } 276 277 /* 278 * psmouse_interrupt() handles incoming characters, either passing them 279 * for normal processing or gathering them as command response. 280 */ 281 282 static irqreturn_t psmouse_interrupt(struct serio *serio, 283 unsigned char data, unsigned int flags) 284 { 285 struct psmouse *psmouse = serio_get_drvdata(serio); 286 287 if (psmouse->state == PSMOUSE_IGNORE) 288 goto out; 289 290 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 291 if (psmouse->state == PSMOUSE_ACTIVATED) 292 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 293 flags & SERIO_TIMEOUT ? " timeout" : "", 294 flags & SERIO_PARITY ? " bad parity" : ""); 295 ps2_cmd_aborted(&psmouse->ps2dev); 296 goto out; 297 } 298 299 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 300 if (ps2_handle_ack(&psmouse->ps2dev, data)) 301 goto out; 302 303 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 304 if (ps2_handle_response(&psmouse->ps2dev, data)) 305 goto out; 306 307 if (psmouse->state <= PSMOUSE_RESYNCING) 308 goto out; 309 310 if (psmouse->state == PSMOUSE_ACTIVATED && 311 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 312 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 313 psmouse->name, psmouse->phys, psmouse->pktcnt); 314 psmouse->badbyte = psmouse->packet[0]; 315 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 316 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 317 goto out; 318 } 319 320 psmouse->packet[psmouse->pktcnt++] = data; 321 /* 322 * Check if this is a new device announcement (0xAA 0x00) 323 */ 324 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 325 if (psmouse->pktcnt == 1) { 326 psmouse->last = jiffies; 327 goto out; 328 } 329 330 if (psmouse->packet[1] == PSMOUSE_RET_ID || 331 (psmouse->type == PSMOUSE_HGPK && 332 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 333 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 334 serio_reconnect(serio); 335 goto out; 336 } 337 /* 338 * Not a new device, try processing first byte normally 339 */ 340 psmouse->pktcnt = 1; 341 if (psmouse_handle_byte(psmouse)) 342 goto out; 343 344 psmouse->packet[psmouse->pktcnt++] = data; 345 } 346 347 /* 348 * See if we need to force resync because mouse was idle for too long 349 */ 350 if (psmouse->state == PSMOUSE_ACTIVATED && 351 psmouse->pktcnt == 1 && psmouse->resync_time && 352 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 353 psmouse->badbyte = psmouse->packet[0]; 354 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 355 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 356 goto out; 357 } 358 359 psmouse->last = jiffies; 360 psmouse_handle_byte(psmouse); 361 362 out: 363 return IRQ_HANDLED; 364 } 365 366 367 /* 368 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 369 * using sliced syntax, understood by advanced devices, such as Logitech 370 * or Synaptics touchpads. The command is encoded as: 371 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 372 * is the command. 373 */ 374 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 375 { 376 int i; 377 378 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 379 return -1; 380 381 for (i = 6; i >= 0; i -= 2) { 382 unsigned char d = (command >> i) & 3; 383 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 384 return -1; 385 } 386 387 return 0; 388 } 389 390 391 /* 392 * psmouse_reset() resets the mouse into power-on state. 393 */ 394 int psmouse_reset(struct psmouse *psmouse) 395 { 396 unsigned char param[2]; 397 398 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 399 return -1; 400 401 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 402 return -1; 403 404 return 0; 405 } 406 407 408 /* 409 * Genius NetMouse magic init. 410 */ 411 static int genius_detect(struct psmouse *psmouse, int set_properties) 412 { 413 struct ps2dev *ps2dev = &psmouse->ps2dev; 414 unsigned char param[4]; 415 416 param[0] = 3; 417 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 418 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 419 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 420 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 421 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 422 423 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 424 return -1; 425 426 if (set_properties) { 427 set_bit(BTN_EXTRA, psmouse->dev->keybit); 428 set_bit(BTN_SIDE, psmouse->dev->keybit); 429 set_bit(REL_WHEEL, psmouse->dev->relbit); 430 431 psmouse->vendor = "Genius"; 432 psmouse->name = "Mouse"; 433 psmouse->pktsize = 4; 434 } 435 436 return 0; 437 } 438 439 /* 440 * IntelliMouse magic init. 441 */ 442 static int intellimouse_detect(struct psmouse *psmouse, int set_properties) 443 { 444 struct ps2dev *ps2dev = &psmouse->ps2dev; 445 unsigned char param[2]; 446 447 param[0] = 200; 448 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 449 param[0] = 100; 450 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 451 param[0] = 80; 452 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 453 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 454 455 if (param[0] != 3) 456 return -1; 457 458 if (set_properties) { 459 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 460 set_bit(REL_WHEEL, psmouse->dev->relbit); 461 462 if (!psmouse->vendor) psmouse->vendor = "Generic"; 463 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 464 psmouse->pktsize = 4; 465 } 466 467 return 0; 468 } 469 470 /* 471 * Try IntelliMouse/Explorer magic init. 472 */ 473 static int im_explorer_detect(struct psmouse *psmouse, int set_properties) 474 { 475 struct ps2dev *ps2dev = &psmouse->ps2dev; 476 unsigned char param[2]; 477 478 intellimouse_detect(psmouse, 0); 479 480 param[0] = 200; 481 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 482 param[0] = 200; 483 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 484 param[0] = 80; 485 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 486 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 487 488 if (param[0] != 4) 489 return -1; 490 491 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 492 param[0] = 200; 493 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 494 param[0] = 80; 495 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 496 param[0] = 40; 497 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 498 499 if (set_properties) { 500 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 501 set_bit(REL_WHEEL, psmouse->dev->relbit); 502 set_bit(REL_HWHEEL, psmouse->dev->relbit); 503 set_bit(BTN_SIDE, psmouse->dev->keybit); 504 set_bit(BTN_EXTRA, psmouse->dev->keybit); 505 506 if (!psmouse->vendor) psmouse->vendor = "Generic"; 507 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 508 psmouse->pktsize = 4; 509 } 510 511 return 0; 512 } 513 514 /* 515 * Kensington ThinkingMouse / ExpertMouse magic init. 516 */ 517 static int thinking_detect(struct psmouse *psmouse, int set_properties) 518 { 519 struct ps2dev *ps2dev = &psmouse->ps2dev; 520 unsigned char param[2]; 521 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 522 int i; 523 524 param[0] = 10; 525 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 526 param[0] = 0; 527 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 528 for (i = 0; i < ARRAY_SIZE(seq); i++) { 529 param[0] = seq[i]; 530 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 531 } 532 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 533 534 if (param[0] != 2) 535 return -1; 536 537 if (set_properties) { 538 set_bit(BTN_EXTRA, psmouse->dev->keybit); 539 540 psmouse->vendor = "Kensington"; 541 psmouse->name = "ThinkingMouse"; 542 } 543 544 return 0; 545 } 546 547 /* 548 * Bare PS/2 protocol "detection". Always succeeds. 549 */ 550 static int ps2bare_detect(struct psmouse *psmouse, int set_properties) 551 { 552 if (set_properties) { 553 if (!psmouse->vendor) psmouse->vendor = "Generic"; 554 if (!psmouse->name) psmouse->name = "Mouse"; 555 } 556 557 return 0; 558 } 559 560 /* 561 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 562 * must be forced by sysfs protocol writing. 563 */ 564 static int cortron_detect(struct psmouse *psmouse, int set_properties) 565 { 566 if (set_properties) { 567 psmouse->vendor = "Cortron"; 568 psmouse->name = "PS/2 Trackball"; 569 set_bit(BTN_SIDE, psmouse->dev->keybit); 570 } 571 572 return 0; 573 } 574 575 /* 576 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 577 * the mouse may have. 578 */ 579 580 static int psmouse_extensions(struct psmouse *psmouse, 581 unsigned int max_proto, int set_properties) 582 { 583 int synaptics_hardware = 0; 584 585 /* 586 * We always check for lifebook because it does not disturb mouse 587 * (it only checks DMI information). 588 */ 589 if (lifebook_detect(psmouse, set_properties) == 0) { 590 if (max_proto > PSMOUSE_IMEX) { 591 if (!set_properties || lifebook_init(psmouse) == 0) 592 return PSMOUSE_LIFEBOOK; 593 } 594 } 595 596 /* 597 * Try Kensington ThinkingMouse (we try first, because synaptics probe 598 * upsets the thinkingmouse). 599 */ 600 601 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 602 return PSMOUSE_THINKPS; 603 604 /* 605 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 606 * support is disabled in config - we need to know if it is synaptics so we 607 * can reset it properly after probing for intellimouse. 608 */ 609 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 610 synaptics_hardware = 1; 611 612 if (max_proto > PSMOUSE_IMEX) { 613 if (!set_properties || synaptics_init(psmouse) == 0) 614 return PSMOUSE_SYNAPTICS; 615 /* 616 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 617 * Unfortunately Logitech/Genius probes confuse some firmware versions so 618 * we'll have to skip them. 619 */ 620 max_proto = PSMOUSE_IMEX; 621 } 622 /* 623 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 624 */ 625 synaptics_reset(psmouse); 626 } 627 628 /* 629 * Try ALPS TouchPad 630 */ 631 if (max_proto > PSMOUSE_IMEX) { 632 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 633 if (alps_detect(psmouse, set_properties) == 0) { 634 if (!set_properties || alps_init(psmouse) == 0) 635 return PSMOUSE_ALPS; 636 /* 637 * Init failed, try basic relative protocols 638 */ 639 max_proto = PSMOUSE_IMEX; 640 } 641 } 642 643 /* 644 * Try OLPC HGPK touchpad. 645 */ 646 if (max_proto > PSMOUSE_IMEX && 647 hgpk_detect(psmouse, set_properties) == 0) { 648 if (!set_properties || hgpk_init(psmouse) == 0) 649 return PSMOUSE_HGPK; 650 /* 651 * Init failed, try basic relative protocols 652 */ 653 max_proto = PSMOUSE_IMEX; 654 } 655 656 /* 657 * Try Elantech touchpad. 658 */ 659 if (max_proto > PSMOUSE_IMEX && 660 elantech_detect(psmouse, set_properties) == 0) { 661 if (!set_properties || elantech_init(psmouse) == 0) 662 return PSMOUSE_ELANTECH; 663 /* 664 * Init failed, try basic relative protocols 665 */ 666 max_proto = PSMOUSE_IMEX; 667 } 668 669 if (max_proto > PSMOUSE_IMEX) { 670 if (genius_detect(psmouse, set_properties) == 0) 671 return PSMOUSE_GENPS; 672 673 if (ps2pp_init(psmouse, set_properties) == 0) 674 return PSMOUSE_PS2PP; 675 676 if (trackpoint_detect(psmouse, set_properties) == 0) 677 return PSMOUSE_TRACKPOINT; 678 679 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 680 return PSMOUSE_TOUCHKIT_PS2; 681 } 682 683 /* 684 * Reset to defaults in case the device got confused by extended 685 * protocol probes. Note that we follow up with full reset because 686 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 687 */ 688 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 689 psmouse_reset(psmouse); 690 691 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 692 return PSMOUSE_IMEX; 693 694 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 695 return PSMOUSE_IMPS; 696 697 /* 698 * Okay, all failed, we have a standard mouse here. The number of the buttons 699 * is still a question, though. We assume 3. 700 */ 701 ps2bare_detect(psmouse, set_properties); 702 703 if (synaptics_hardware) { 704 /* 705 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 706 * We need to reset the touchpad because if there is a track point on the 707 * pass through port it could get disabled while probing for protocol 708 * extensions. 709 */ 710 psmouse_reset(psmouse); 711 } 712 713 return PSMOUSE_PS2; 714 } 715 716 static const struct psmouse_protocol psmouse_protocols[] = { 717 { 718 .type = PSMOUSE_PS2, 719 .name = "PS/2", 720 .alias = "bare", 721 .maxproto = 1, 722 .detect = ps2bare_detect, 723 }, 724 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 725 { 726 .type = PSMOUSE_PS2PP, 727 .name = "PS2++", 728 .alias = "logitech", 729 .detect = ps2pp_init, 730 }, 731 #endif 732 { 733 .type = PSMOUSE_THINKPS, 734 .name = "ThinkPS/2", 735 .alias = "thinkps", 736 .detect = thinking_detect, 737 }, 738 { 739 .type = PSMOUSE_GENPS, 740 .name = "GenPS/2", 741 .alias = "genius", 742 .detect = genius_detect, 743 }, 744 { 745 .type = PSMOUSE_IMPS, 746 .name = "ImPS/2", 747 .alias = "imps", 748 .maxproto = 1, 749 .detect = intellimouse_detect, 750 }, 751 { 752 .type = PSMOUSE_IMEX, 753 .name = "ImExPS/2", 754 .alias = "exps", 755 .maxproto = 1, 756 .detect = im_explorer_detect, 757 }, 758 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 759 { 760 .type = PSMOUSE_SYNAPTICS, 761 .name = "SynPS/2", 762 .alias = "synaptics", 763 .detect = synaptics_detect, 764 .init = synaptics_init, 765 }, 766 #endif 767 #ifdef CONFIG_MOUSE_PS2_ALPS 768 { 769 .type = PSMOUSE_ALPS, 770 .name = "AlpsPS/2", 771 .alias = "alps", 772 .detect = alps_detect, 773 .init = alps_init, 774 }, 775 #endif 776 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 777 { 778 .type = PSMOUSE_LIFEBOOK, 779 .name = "LBPS/2", 780 .alias = "lifebook", 781 .init = lifebook_init, 782 }, 783 #endif 784 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 785 { 786 .type = PSMOUSE_TRACKPOINT, 787 .name = "TPPS/2", 788 .alias = "trackpoint", 789 .detect = trackpoint_detect, 790 }, 791 #endif 792 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 793 { 794 .type = PSMOUSE_TOUCHKIT_PS2, 795 .name = "touchkitPS/2", 796 .alias = "touchkit", 797 .detect = touchkit_ps2_detect, 798 }, 799 #endif 800 #ifdef CONFIG_MOUSE_PS2_OLPC 801 { 802 .type = PSMOUSE_HGPK, 803 .name = "OLPC HGPK", 804 .alias = "hgpk", 805 .detect = hgpk_detect, 806 }, 807 #endif 808 #ifdef CONFIG_MOUSE_PS2_ELANTECH 809 { 810 .type = PSMOUSE_ELANTECH, 811 .name = "ETPS/2", 812 .alias = "elantech", 813 .detect = elantech_detect, 814 .init = elantech_init, 815 }, 816 #endif 817 { 818 .type = PSMOUSE_CORTRON, 819 .name = "CortronPS/2", 820 .alias = "cortps", 821 .detect = cortron_detect, 822 }, 823 { 824 .type = PSMOUSE_AUTO, 825 .name = "auto", 826 .alias = "any", 827 .maxproto = 1, 828 }, 829 }; 830 831 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 832 { 833 int i; 834 835 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 836 if (psmouse_protocols[i].type == type) 837 return &psmouse_protocols[i]; 838 839 WARN_ON(1); 840 return &psmouse_protocols[0]; 841 } 842 843 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 844 { 845 const struct psmouse_protocol *p; 846 int i; 847 848 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 849 p = &psmouse_protocols[i]; 850 851 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 852 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 853 return &psmouse_protocols[i]; 854 } 855 856 return NULL; 857 } 858 859 860 /* 861 * psmouse_probe() probes for a PS/2 mouse. 862 */ 863 864 static int psmouse_probe(struct psmouse *psmouse) 865 { 866 struct ps2dev *ps2dev = &psmouse->ps2dev; 867 unsigned char param[2]; 868 869 /* 870 * First, we check if it's a mouse. It should send 0x00 or 0x03 871 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 872 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 873 * ID queries, probably due to a firmware bug. 874 */ 875 876 param[0] = 0xa5; 877 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 878 return -1; 879 880 if (param[0] != 0x00 && param[0] != 0x03 && 881 param[0] != 0x04 && param[0] != 0xff) 882 return -1; 883 884 /* 885 * Then we reset and disable the mouse so that it doesn't generate events. 886 */ 887 888 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 889 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 890 891 return 0; 892 } 893 894 /* 895 * Here we set the mouse resolution. 896 */ 897 898 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 899 { 900 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 901 unsigned char p; 902 903 if (resolution == 0 || resolution > 200) 904 resolution = 200; 905 906 p = params[resolution / 50]; 907 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 908 psmouse->resolution = 25 << p; 909 } 910 911 /* 912 * Here we set the mouse report rate. 913 */ 914 915 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 916 { 917 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 918 unsigned char r; 919 int i = 0; 920 921 while (rates[i] > rate) i++; 922 r = rates[i]; 923 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 924 psmouse->rate = r; 925 } 926 927 /* 928 * psmouse_initialize() initializes the mouse to a sane state. 929 */ 930 931 static void psmouse_initialize(struct psmouse *psmouse) 932 { 933 /* 934 * We set the mouse report rate, resolution and scaling. 935 */ 936 937 if (psmouse_max_proto != PSMOUSE_PS2) { 938 psmouse->set_rate(psmouse, psmouse->rate); 939 psmouse->set_resolution(psmouse, psmouse->resolution); 940 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 941 } 942 } 943 944 /* 945 * psmouse_activate() enables the mouse so that we get motion reports from it. 946 */ 947 948 static void psmouse_activate(struct psmouse *psmouse) 949 { 950 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 951 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 952 psmouse->ps2dev.serio->phys); 953 954 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 955 } 956 957 958 /* 959 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 960 * reports from it unless we explicitly request it. 961 */ 962 963 static void psmouse_deactivate(struct psmouse *psmouse) 964 { 965 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 966 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 967 psmouse->ps2dev.serio->phys); 968 969 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 970 } 971 972 /* 973 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 974 */ 975 976 static int psmouse_poll(struct psmouse *psmouse) 977 { 978 return ps2_command(&psmouse->ps2dev, psmouse->packet, 979 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 980 } 981 982 983 /* 984 * psmouse_resync() attempts to re-validate current protocol. 985 */ 986 987 static void psmouse_resync(struct work_struct *work) 988 { 989 struct psmouse *parent = NULL, *psmouse = 990 container_of(work, struct psmouse, resync_work.work); 991 struct serio *serio = psmouse->ps2dev.serio; 992 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 993 int failed = 0, enabled = 0; 994 int i; 995 996 mutex_lock(&psmouse_mutex); 997 998 if (psmouse->state != PSMOUSE_RESYNCING) 999 goto out; 1000 1001 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1002 parent = serio_get_drvdata(serio->parent); 1003 psmouse_deactivate(parent); 1004 } 1005 1006 /* 1007 * Some mice don't ACK commands sent while they are in the middle of 1008 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1009 * instead of ps2_command() which would wait for 200ms for an ACK 1010 * that may never come. 1011 * As an additional quirk ALPS touchpads may not only forget to ACK 1012 * disable command but will stop reporting taps, so if we see that 1013 * mouse at least once ACKs disable we will do full reconnect if ACK 1014 * is missing. 1015 */ 1016 psmouse->num_resyncs++; 1017 1018 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1019 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1020 failed = 1; 1021 } else 1022 psmouse->acks_disable_command = 1; 1023 1024 /* 1025 * Poll the mouse. If it was reset the packet will be shorter than 1026 * psmouse->pktsize and ps2_command will fail. We do not expect and 1027 * do not handle scenario when mouse "upgrades" its protocol while 1028 * disconnected since it would require additional delay. If we ever 1029 * see a mouse that does it we'll adjust the code. 1030 */ 1031 if (!failed) { 1032 if (psmouse->poll(psmouse)) 1033 failed = 1; 1034 else { 1035 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1036 for (i = 0; i < psmouse->pktsize; i++) { 1037 psmouse->pktcnt++; 1038 rc = psmouse->protocol_handler(psmouse); 1039 if (rc != PSMOUSE_GOOD_DATA) 1040 break; 1041 } 1042 if (rc != PSMOUSE_FULL_PACKET) 1043 failed = 1; 1044 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1045 } 1046 } 1047 /* 1048 * Now try to enable mouse. We try to do that even if poll failed and also 1049 * repeat our attempts 5 times, otherwise we may be left out with disabled 1050 * mouse. 1051 */ 1052 for (i = 0; i < 5; i++) { 1053 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1054 enabled = 1; 1055 break; 1056 } 1057 msleep(200); 1058 } 1059 1060 if (!enabled) { 1061 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1062 psmouse->ps2dev.serio->phys); 1063 failed = 1; 1064 } 1065 1066 if (failed) { 1067 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1068 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1069 serio_reconnect(serio); 1070 } else 1071 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1072 1073 if (parent) 1074 psmouse_activate(parent); 1075 out: 1076 mutex_unlock(&psmouse_mutex); 1077 } 1078 1079 /* 1080 * psmouse_cleanup() resets the mouse into power-on state. 1081 */ 1082 1083 static void psmouse_cleanup(struct serio *serio) 1084 { 1085 struct psmouse *psmouse = serio_get_drvdata(serio); 1086 struct psmouse *parent = NULL; 1087 1088 mutex_lock(&psmouse_mutex); 1089 1090 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1091 parent = serio_get_drvdata(serio->parent); 1092 psmouse_deactivate(parent); 1093 } 1094 1095 psmouse_deactivate(psmouse); 1096 1097 if (psmouse->cleanup) 1098 psmouse->cleanup(psmouse); 1099 1100 psmouse_reset(psmouse); 1101 1102 /* 1103 * Some boxes, such as HP nx7400, get terribly confused if mouse 1104 * is not fully enabled before suspending/shutting down. 1105 */ 1106 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1107 1108 if (parent) { 1109 if (parent->pt_deactivate) 1110 parent->pt_deactivate(parent); 1111 1112 psmouse_activate(parent); 1113 } 1114 1115 mutex_unlock(&psmouse_mutex); 1116 } 1117 1118 /* 1119 * psmouse_disconnect() closes and frees. 1120 */ 1121 1122 static void psmouse_disconnect(struct serio *serio) 1123 { 1124 struct psmouse *psmouse, *parent = NULL; 1125 1126 psmouse = serio_get_drvdata(serio); 1127 1128 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1129 1130 mutex_lock(&psmouse_mutex); 1131 1132 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1133 1134 /* make sure we don't have a resync in progress */ 1135 mutex_unlock(&psmouse_mutex); 1136 flush_workqueue(kpsmoused_wq); 1137 mutex_lock(&psmouse_mutex); 1138 1139 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1140 parent = serio_get_drvdata(serio->parent); 1141 psmouse_deactivate(parent); 1142 } 1143 1144 if (psmouse->disconnect) 1145 psmouse->disconnect(psmouse); 1146 1147 if (parent && parent->pt_deactivate) 1148 parent->pt_deactivate(parent); 1149 1150 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1151 1152 serio_close(serio); 1153 serio_set_drvdata(serio, NULL); 1154 input_unregister_device(psmouse->dev); 1155 kfree(psmouse); 1156 1157 if (parent) 1158 psmouse_activate(parent); 1159 1160 mutex_unlock(&psmouse_mutex); 1161 } 1162 1163 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto) 1164 { 1165 struct input_dev *input_dev = psmouse->dev; 1166 1167 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1168 1169 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); 1170 input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | 1171 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); 1172 input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); 1173 1174 psmouse->set_rate = psmouse_set_rate; 1175 psmouse->set_resolution = psmouse_set_resolution; 1176 psmouse->poll = psmouse_poll; 1177 psmouse->protocol_handler = psmouse_process_byte; 1178 psmouse->pktsize = 3; 1179 1180 if (proto && (proto->detect || proto->init)) { 1181 if (proto->detect && proto->detect(psmouse, 1) < 0) 1182 return -1; 1183 1184 if (proto->init && proto->init(psmouse) < 0) 1185 return -1; 1186 1187 psmouse->type = proto->type; 1188 } 1189 else 1190 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); 1191 1192 /* 1193 * If mouse's packet size is 3 there is no point in polling the 1194 * device in hopes to detect protocol reset - we won't get less 1195 * than 3 bytes response anyhow. 1196 */ 1197 if (psmouse->pktsize == 3) 1198 psmouse->resync_time = 0; 1199 1200 /* 1201 * Some smart KVMs fake response to POLL command returning just 1202 * 3 bytes and messing up our resync logic, so if initial poll 1203 * fails we won't try polling the device anymore. Hopefully 1204 * such KVM will maintain initially selected protocol. 1205 */ 1206 if (psmouse->resync_time && psmouse->poll(psmouse)) 1207 psmouse->resync_time = 0; 1208 1209 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1210 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1211 1212 input_dev->name = psmouse->devname; 1213 input_dev->phys = psmouse->phys; 1214 input_dev->id.bustype = BUS_I8042; 1215 input_dev->id.vendor = 0x0002; 1216 input_dev->id.product = psmouse->type; 1217 input_dev->id.version = psmouse->model; 1218 1219 return 0; 1220 } 1221 1222 /* 1223 * psmouse_connect() is a callback from the serio module when 1224 * an unhandled serio port is found. 1225 */ 1226 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1227 { 1228 struct psmouse *psmouse, *parent = NULL; 1229 struct input_dev *input_dev; 1230 int retval = 0, error = -ENOMEM; 1231 1232 mutex_lock(&psmouse_mutex); 1233 1234 /* 1235 * If this is a pass-through port deactivate parent so the device 1236 * connected to this port can be successfully identified 1237 */ 1238 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1239 parent = serio_get_drvdata(serio->parent); 1240 psmouse_deactivate(parent); 1241 } 1242 1243 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1244 input_dev = input_allocate_device(); 1245 if (!psmouse || !input_dev) 1246 goto err_free; 1247 1248 ps2_init(&psmouse->ps2dev, serio); 1249 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1250 psmouse->dev = input_dev; 1251 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1252 1253 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1254 1255 serio_set_drvdata(serio, psmouse); 1256 1257 error = serio_open(serio, drv); 1258 if (error) 1259 goto err_clear_drvdata; 1260 1261 if (psmouse_probe(psmouse) < 0) { 1262 error = -ENODEV; 1263 goto err_close_serio; 1264 } 1265 1266 psmouse->rate = psmouse_rate; 1267 psmouse->resolution = psmouse_resolution; 1268 psmouse->resetafter = psmouse_resetafter; 1269 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1270 psmouse->smartscroll = psmouse_smartscroll; 1271 1272 psmouse_switch_protocol(psmouse, NULL); 1273 1274 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1275 psmouse_initialize(psmouse); 1276 1277 error = input_register_device(psmouse->dev); 1278 if (error) 1279 goto err_protocol_disconnect; 1280 1281 if (parent && parent->pt_activate) 1282 parent->pt_activate(parent); 1283 1284 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1285 if (error) 1286 goto err_pt_deactivate; 1287 1288 psmouse_activate(psmouse); 1289 1290 out: 1291 /* If this is a pass-through port the parent needs to be re-activated */ 1292 if (parent) 1293 psmouse_activate(parent); 1294 1295 mutex_unlock(&psmouse_mutex); 1296 return retval; 1297 1298 err_pt_deactivate: 1299 if (parent && parent->pt_deactivate) 1300 parent->pt_deactivate(parent); 1301 input_unregister_device(psmouse->dev); 1302 input_dev = NULL; /* so we don't try to free it below */ 1303 err_protocol_disconnect: 1304 if (psmouse->disconnect) 1305 psmouse->disconnect(psmouse); 1306 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1307 err_close_serio: 1308 serio_close(serio); 1309 err_clear_drvdata: 1310 serio_set_drvdata(serio, NULL); 1311 err_free: 1312 input_free_device(input_dev); 1313 kfree(psmouse); 1314 1315 retval = error; 1316 goto out; 1317 } 1318 1319 1320 static int psmouse_reconnect(struct serio *serio) 1321 { 1322 struct psmouse *psmouse = serio_get_drvdata(serio); 1323 struct psmouse *parent = NULL; 1324 struct serio_driver *drv = serio->drv; 1325 int rc = -1; 1326 1327 if (!drv || !psmouse) { 1328 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1329 return -1; 1330 } 1331 1332 mutex_lock(&psmouse_mutex); 1333 1334 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1335 parent = serio_get_drvdata(serio->parent); 1336 psmouse_deactivate(parent); 1337 } 1338 1339 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1340 1341 if (psmouse->reconnect) { 1342 if (psmouse->reconnect(psmouse)) 1343 goto out; 1344 } else if (psmouse_probe(psmouse) < 0 || 1345 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) 1346 goto out; 1347 1348 /* ok, the device type (and capabilities) match the old one, 1349 * we can continue using it, complete intialization 1350 */ 1351 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1352 1353 psmouse_initialize(psmouse); 1354 1355 if (parent && parent->pt_activate) 1356 parent->pt_activate(parent); 1357 1358 psmouse_activate(psmouse); 1359 rc = 0; 1360 1361 out: 1362 /* If this is a pass-through port the parent waits to be activated */ 1363 if (parent) 1364 psmouse_activate(parent); 1365 1366 mutex_unlock(&psmouse_mutex); 1367 return rc; 1368 } 1369 1370 static struct serio_device_id psmouse_serio_ids[] = { 1371 { 1372 .type = SERIO_8042, 1373 .proto = SERIO_ANY, 1374 .id = SERIO_ANY, 1375 .extra = SERIO_ANY, 1376 }, 1377 { 1378 .type = SERIO_PS_PSTHRU, 1379 .proto = SERIO_ANY, 1380 .id = SERIO_ANY, 1381 .extra = SERIO_ANY, 1382 }, 1383 { 0 } 1384 }; 1385 1386 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1387 1388 static struct serio_driver psmouse_drv = { 1389 .driver = { 1390 .name = "psmouse", 1391 }, 1392 .description = DRIVER_DESC, 1393 .id_table = psmouse_serio_ids, 1394 .interrupt = psmouse_interrupt, 1395 .connect = psmouse_connect, 1396 .reconnect = psmouse_reconnect, 1397 .disconnect = psmouse_disconnect, 1398 .cleanup = psmouse_cleanup, 1399 }; 1400 1401 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1402 char *buf) 1403 { 1404 struct serio *serio = to_serio_port(dev); 1405 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1406 struct psmouse *psmouse; 1407 int retval; 1408 1409 retval = serio_pin_driver(serio); 1410 if (retval) 1411 return retval; 1412 1413 if (serio->drv != &psmouse_drv) { 1414 retval = -ENODEV; 1415 goto out; 1416 } 1417 1418 psmouse = serio_get_drvdata(serio); 1419 1420 retval = attr->show(psmouse, attr->data, buf); 1421 1422 out: 1423 serio_unpin_driver(serio); 1424 return retval; 1425 } 1426 1427 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1428 const char *buf, size_t count) 1429 { 1430 struct serio *serio = to_serio_port(dev); 1431 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1432 struct psmouse *psmouse, *parent = NULL; 1433 int retval; 1434 1435 retval = serio_pin_driver(serio); 1436 if (retval) 1437 return retval; 1438 1439 if (serio->drv != &psmouse_drv) { 1440 retval = -ENODEV; 1441 goto out_unpin; 1442 } 1443 1444 retval = mutex_lock_interruptible(&psmouse_mutex); 1445 if (retval) 1446 goto out_unpin; 1447 1448 psmouse = serio_get_drvdata(serio); 1449 1450 if (attr->protect) { 1451 if (psmouse->state == PSMOUSE_IGNORE) { 1452 retval = -ENODEV; 1453 goto out_unlock; 1454 } 1455 1456 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1457 parent = serio_get_drvdata(serio->parent); 1458 psmouse_deactivate(parent); 1459 } 1460 1461 psmouse_deactivate(psmouse); 1462 } 1463 1464 retval = attr->set(psmouse, attr->data, buf, count); 1465 1466 if (attr->protect) { 1467 if (retval != -ENODEV) 1468 psmouse_activate(psmouse); 1469 1470 if (parent) 1471 psmouse_activate(parent); 1472 } 1473 1474 out_unlock: 1475 mutex_unlock(&psmouse_mutex); 1476 out_unpin: 1477 serio_unpin_driver(serio); 1478 return retval; 1479 } 1480 1481 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1482 { 1483 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1484 1485 return sprintf(buf, "%u\n", *field); 1486 } 1487 1488 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1489 { 1490 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1491 unsigned long value; 1492 1493 if (strict_strtoul(buf, 10, &value)) 1494 return -EINVAL; 1495 1496 if ((unsigned int)value != value) 1497 return -EINVAL; 1498 1499 *field = value; 1500 1501 return count; 1502 } 1503 1504 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1505 { 1506 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1507 } 1508 1509 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1510 { 1511 struct serio *serio = psmouse->ps2dev.serio; 1512 struct psmouse *parent = NULL; 1513 struct input_dev *old_dev, *new_dev; 1514 const struct psmouse_protocol *proto, *old_proto; 1515 int error; 1516 int retry = 0; 1517 1518 proto = psmouse_protocol_by_name(buf, count); 1519 if (!proto) 1520 return -EINVAL; 1521 1522 if (psmouse->type == proto->type) 1523 return count; 1524 1525 new_dev = input_allocate_device(); 1526 if (!new_dev) 1527 return -ENOMEM; 1528 1529 while (serio->child) { 1530 if (++retry > 3) { 1531 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); 1532 input_free_device(new_dev); 1533 return -EIO; 1534 } 1535 1536 mutex_unlock(&psmouse_mutex); 1537 serio_unpin_driver(serio); 1538 serio_unregister_child_port(serio); 1539 serio_pin_driver_uninterruptible(serio); 1540 mutex_lock(&psmouse_mutex); 1541 1542 if (serio->drv != &psmouse_drv) { 1543 input_free_device(new_dev); 1544 return -ENODEV; 1545 } 1546 1547 if (psmouse->type == proto->type) { 1548 input_free_device(new_dev); 1549 return count; /* switched by other thread */ 1550 } 1551 } 1552 1553 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1554 parent = serio_get_drvdata(serio->parent); 1555 if (parent->pt_deactivate) 1556 parent->pt_deactivate(parent); 1557 } 1558 1559 old_dev = psmouse->dev; 1560 old_proto = psmouse_protocol_by_type(psmouse->type); 1561 1562 if (psmouse->disconnect) 1563 psmouse->disconnect(psmouse); 1564 1565 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1566 1567 psmouse->dev = new_dev; 1568 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1569 1570 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1571 psmouse_reset(psmouse); 1572 /* default to PSMOUSE_PS2 */ 1573 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1574 } 1575 1576 psmouse_initialize(psmouse); 1577 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1578 1579 error = input_register_device(psmouse->dev); 1580 if (error) { 1581 if (psmouse->disconnect) 1582 psmouse->disconnect(psmouse); 1583 1584 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1585 input_free_device(new_dev); 1586 psmouse->dev = old_dev; 1587 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1588 psmouse_switch_protocol(psmouse, old_proto); 1589 psmouse_initialize(psmouse); 1590 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1591 1592 return error; 1593 } 1594 1595 input_unregister_device(old_dev); 1596 1597 if (parent && parent->pt_activate) 1598 parent->pt_activate(parent); 1599 1600 return count; 1601 } 1602 1603 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1604 { 1605 unsigned long value; 1606 1607 if (strict_strtoul(buf, 10, &value)) 1608 return -EINVAL; 1609 1610 psmouse->set_rate(psmouse, value); 1611 return count; 1612 } 1613 1614 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1615 { 1616 unsigned long value; 1617 1618 if (strict_strtoul(buf, 10, &value)) 1619 return -EINVAL; 1620 1621 psmouse->set_resolution(psmouse, value); 1622 return count; 1623 } 1624 1625 1626 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1627 { 1628 const struct psmouse_protocol *proto; 1629 1630 if (!val) 1631 return -EINVAL; 1632 1633 proto = psmouse_protocol_by_name(val, strlen(val)); 1634 1635 if (!proto || !proto->maxproto) 1636 return -EINVAL; 1637 1638 *((unsigned int *)kp->arg) = proto->type; 1639 1640 return 0; 1641 } 1642 1643 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1644 { 1645 int type = *((unsigned int *)kp->arg); 1646 1647 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1648 } 1649 1650 static int __init psmouse_init(void) 1651 { 1652 int err; 1653 1654 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1655 if (!kpsmoused_wq) { 1656 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1657 return -ENOMEM; 1658 } 1659 1660 err = serio_register_driver(&psmouse_drv); 1661 if (err) 1662 destroy_workqueue(kpsmoused_wq); 1663 1664 return err; 1665 } 1666 1667 static void __exit psmouse_exit(void) 1668 { 1669 serio_unregister_driver(&psmouse_drv); 1670 destroy_workqueue(kpsmoused_wq); 1671 } 1672 1673 module_init(psmouse_init); 1674 module_exit(psmouse_exit); 1675