1 /* 2 * PS/2 mouse driver 3 * 4 * Copyright (c) 1999-2002 Vojtech Pavlik 5 * Copyright (c) 2003-2004 Dmitry Torokhov 6 */ 7 8 /* 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License version 2 as published by 11 * the Free Software Foundation. 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <linux/slab.h> 18 #include <linux/interrupt.h> 19 #include <linux/input.h> 20 #include <linux/serio.h> 21 #include <linux/init.h> 22 #include <linux/libps2.h> 23 #include <linux/mutex.h> 24 25 #include "psmouse.h" 26 #include "synaptics.h" 27 #include "logips2pp.h" 28 #include "alps.h" 29 #include "lifebook.h" 30 #include "trackpoint.h" 31 #include "touchkit_ps2.h" 32 33 #define DRIVER_DESC "PS/2 mouse driver" 34 35 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 36 MODULE_DESCRIPTION(DRIVER_DESC); 37 MODULE_LICENSE("GPL"); 38 39 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 40 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); 41 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); 42 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 43 #define param_set_proto_abbrev psmouse_set_maxproto 44 #define param_get_proto_abbrev psmouse_get_maxproto 45 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 46 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 47 48 static unsigned int psmouse_resolution = 200; 49 module_param_named(resolution, psmouse_resolution, uint, 0644); 50 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 51 52 static unsigned int psmouse_rate = 100; 53 module_param_named(rate, psmouse_rate, uint, 0644); 54 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 55 56 static unsigned int psmouse_smartscroll = 1; 57 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 58 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 59 60 static unsigned int psmouse_resetafter = 5; 61 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 62 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 63 64 static unsigned int psmouse_resync_time; 65 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 66 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 67 68 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 69 NULL, 70 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 71 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 72 (void *) offsetof(struct psmouse, rate), 73 psmouse_show_int_attr, psmouse_attr_set_rate); 74 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 75 (void *) offsetof(struct psmouse, resolution), 76 psmouse_show_int_attr, psmouse_attr_set_resolution); 77 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 78 (void *) offsetof(struct psmouse, resetafter), 79 psmouse_show_int_attr, psmouse_set_int_attr); 80 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 81 (void *) offsetof(struct psmouse, resync_time), 82 psmouse_show_int_attr, psmouse_set_int_attr); 83 84 static struct attribute *psmouse_attributes[] = { 85 &psmouse_attr_protocol.dattr.attr, 86 &psmouse_attr_rate.dattr.attr, 87 &psmouse_attr_resolution.dattr.attr, 88 &psmouse_attr_resetafter.dattr.attr, 89 &psmouse_attr_resync_time.dattr.attr, 90 NULL 91 }; 92 93 static struct attribute_group psmouse_attribute_group = { 94 .attrs = psmouse_attributes, 95 }; 96 97 /* 98 * psmouse_mutex protects all operations changing state of mouse 99 * (connecting, disconnecting, changing rate or resolution via 100 * sysfs). We could use a per-device semaphore but since there 101 * rarely more than one PS/2 mouse connected and since semaphore 102 * is taken in "slow" paths it is not worth it. 103 */ 104 static DEFINE_MUTEX(psmouse_mutex); 105 106 static struct workqueue_struct *kpsmoused_wq; 107 108 struct psmouse_protocol { 109 enum psmouse_type type; 110 const char *name; 111 const char *alias; 112 int maxproto; 113 int (*detect)(struct psmouse *, int); 114 int (*init)(struct psmouse *); 115 }; 116 117 /* 118 * psmouse_process_byte() analyzes the PS/2 data stream and reports 119 * relevant events to the input module once full packet has arrived. 120 */ 121 122 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 123 { 124 struct input_dev *dev = psmouse->dev; 125 unsigned char *packet = psmouse->packet; 126 127 if (psmouse->pktcnt < psmouse->pktsize) 128 return PSMOUSE_GOOD_DATA; 129 130 /* 131 * Full packet accumulated, process it 132 */ 133 134 /* 135 * Scroll wheel on IntelliMice, scroll buttons on NetMice 136 */ 137 138 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) 139 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 140 141 /* 142 * Scroll wheel and buttons on IntelliMouse Explorer 143 */ 144 145 if (psmouse->type == PSMOUSE_IMEX) { 146 switch (packet[3] & 0xC0) { 147 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 148 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 149 break; 150 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 151 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 152 break; 153 case 0x00: 154 case 0xC0: 155 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 156 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 157 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 158 break; 159 } 160 } 161 162 /* 163 * Extra buttons on Genius NewNet 3D 164 */ 165 166 if (psmouse->type == PSMOUSE_GENPS) { 167 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 168 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 169 } 170 171 /* 172 * Extra button on ThinkingMouse 173 */ 174 if (psmouse->type == PSMOUSE_THINKPS) { 175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 176 /* Without this bit of weirdness moving up gives wildly high Y changes. */ 177 packet[1] |= (packet[0] & 0x40) << 1; 178 } 179 180 /* 181 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first 182 * byte. 183 */ 184 if (psmouse->type == PSMOUSE_CORTRON) { 185 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 186 packet[0] |= 0x08; 187 } 188 189 /* 190 * Generic PS/2 Mouse 191 */ 192 193 input_report_key(dev, BTN_LEFT, packet[0] & 1); 194 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); 195 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); 196 197 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 198 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 199 200 input_sync(dev); 201 202 return PSMOUSE_FULL_PACKET; 203 } 204 205 /* 206 * __psmouse_set_state() sets new psmouse state and resets all flags. 207 */ 208 209 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 210 { 211 psmouse->state = new_state; 212 psmouse->pktcnt = psmouse->out_of_sync = 0; 213 psmouse->ps2dev.flags = 0; 214 psmouse->last = jiffies; 215 } 216 217 218 /* 219 * psmouse_set_state() sets new psmouse state and resets all flags and 220 * counters while holding serio lock so fighting with interrupt handler 221 * is not a concern. 222 */ 223 224 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 225 { 226 serio_pause_rx(psmouse->ps2dev.serio); 227 __psmouse_set_state(psmouse, new_state); 228 serio_continue_rx(psmouse->ps2dev.serio); 229 } 230 231 /* 232 * psmouse_handle_byte() processes one byte of the input data stream 233 * by calling corresponding protocol handler. 234 */ 235 236 static int psmouse_handle_byte(struct psmouse *psmouse) 237 { 238 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 239 240 switch (rc) { 241 case PSMOUSE_BAD_DATA: 242 if (psmouse->state == PSMOUSE_ACTIVATED) { 243 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", 244 psmouse->name, psmouse->phys, psmouse->pktcnt); 245 if (++psmouse->out_of_sync == psmouse->resetafter) { 246 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 247 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); 248 serio_reconnect(psmouse->ps2dev.serio); 249 return -1; 250 } 251 } 252 psmouse->pktcnt = 0; 253 break; 254 255 case PSMOUSE_FULL_PACKET: 256 psmouse->pktcnt = 0; 257 if (psmouse->out_of_sync) { 258 psmouse->out_of_sync = 0; 259 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", 260 psmouse->name, psmouse->phys); 261 } 262 break; 263 264 case PSMOUSE_GOOD_DATA: 265 break; 266 } 267 return 0; 268 } 269 270 /* 271 * psmouse_interrupt() handles incoming characters, either passing them 272 * for normal processing or gathering them as command response. 273 */ 274 275 static irqreturn_t psmouse_interrupt(struct serio *serio, 276 unsigned char data, unsigned int flags) 277 { 278 struct psmouse *psmouse = serio_get_drvdata(serio); 279 280 if (psmouse->state == PSMOUSE_IGNORE) 281 goto out; 282 283 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { 284 if (psmouse->state == PSMOUSE_ACTIVATED) 285 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", 286 flags & SERIO_TIMEOUT ? " timeout" : "", 287 flags & SERIO_PARITY ? " bad parity" : ""); 288 ps2_cmd_aborted(&psmouse->ps2dev); 289 goto out; 290 } 291 292 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 293 if (ps2_handle_ack(&psmouse->ps2dev, data)) 294 goto out; 295 296 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 297 if (ps2_handle_response(&psmouse->ps2dev, data)) 298 goto out; 299 300 if (psmouse->state <= PSMOUSE_RESYNCING) 301 goto out; 302 303 if (psmouse->state == PSMOUSE_ACTIVATED && 304 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 305 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", 306 psmouse->name, psmouse->phys, psmouse->pktcnt); 307 psmouse->badbyte = psmouse->packet[0]; 308 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 309 queue_work(kpsmoused_wq, &psmouse->resync_work); 310 goto out; 311 } 312 313 psmouse->packet[psmouse->pktcnt++] = data; 314 /* 315 * Check if this is a new device announcement (0xAA 0x00) 316 */ 317 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 318 if (psmouse->pktcnt == 1) { 319 psmouse->last = jiffies; 320 goto out; 321 } 322 323 if (psmouse->packet[1] == PSMOUSE_RET_ID) { 324 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 325 serio_reconnect(serio); 326 goto out; 327 } 328 /* 329 * Not a new device, try processing first byte normally 330 */ 331 psmouse->pktcnt = 1; 332 if (psmouse_handle_byte(psmouse)) 333 goto out; 334 335 psmouse->packet[psmouse->pktcnt++] = data; 336 } 337 338 /* 339 * See if we need to force resync because mouse was idle for too long 340 */ 341 if (psmouse->state == PSMOUSE_ACTIVATED && 342 psmouse->pktcnt == 1 && psmouse->resync_time && 343 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 344 psmouse->badbyte = psmouse->packet[0]; 345 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 346 queue_work(kpsmoused_wq, &psmouse->resync_work); 347 goto out; 348 } 349 350 psmouse->last = jiffies; 351 psmouse_handle_byte(psmouse); 352 353 out: 354 return IRQ_HANDLED; 355 } 356 357 358 /* 359 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 360 * using sliced syntax, understood by advanced devices, such as Logitech 361 * or Synaptics touchpads. The command is encoded as: 362 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 363 * is the command. 364 */ 365 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 366 { 367 int i; 368 369 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 370 return -1; 371 372 for (i = 6; i >= 0; i -= 2) { 373 unsigned char d = (command >> i) & 3; 374 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 375 return -1; 376 } 377 378 return 0; 379 } 380 381 382 /* 383 * psmouse_reset() resets the mouse into power-on state. 384 */ 385 int psmouse_reset(struct psmouse *psmouse) 386 { 387 unsigned char param[2]; 388 389 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 390 return -1; 391 392 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 393 return -1; 394 395 return 0; 396 } 397 398 399 /* 400 * Genius NetMouse magic init. 401 */ 402 static int genius_detect(struct psmouse *psmouse, int set_properties) 403 { 404 struct ps2dev *ps2dev = &psmouse->ps2dev; 405 unsigned char param[4]; 406 407 param[0] = 3; 408 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 410 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 411 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 412 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 413 414 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 415 return -1; 416 417 if (set_properties) { 418 set_bit(BTN_EXTRA, psmouse->dev->keybit); 419 set_bit(BTN_SIDE, psmouse->dev->keybit); 420 set_bit(REL_WHEEL, psmouse->dev->relbit); 421 422 psmouse->vendor = "Genius"; 423 psmouse->name = "Mouse"; 424 psmouse->pktsize = 4; 425 } 426 427 return 0; 428 } 429 430 /* 431 * IntelliMouse magic init. 432 */ 433 static int intellimouse_detect(struct psmouse *psmouse, int set_properties) 434 { 435 struct ps2dev *ps2dev = &psmouse->ps2dev; 436 unsigned char param[2]; 437 438 param[0] = 200; 439 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 440 param[0] = 100; 441 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 442 param[0] = 80; 443 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 444 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 445 446 if (param[0] != 3) 447 return -1; 448 449 if (set_properties) { 450 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 451 set_bit(REL_WHEEL, psmouse->dev->relbit); 452 453 if (!psmouse->vendor) psmouse->vendor = "Generic"; 454 if (!psmouse->name) psmouse->name = "Wheel Mouse"; 455 psmouse->pktsize = 4; 456 } 457 458 return 0; 459 } 460 461 /* 462 * Try IntelliMouse/Explorer magic init. 463 */ 464 static int im_explorer_detect(struct psmouse *psmouse, int set_properties) 465 { 466 struct ps2dev *ps2dev = &psmouse->ps2dev; 467 unsigned char param[2]; 468 469 intellimouse_detect(psmouse, 0); 470 471 param[0] = 200; 472 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 473 param[0] = 200; 474 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 475 param[0] = 80; 476 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 477 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 478 479 if (param[0] != 4) 480 return -1; 481 482 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 483 param[0] = 200; 484 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 485 param[0] = 80; 486 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 487 param[0] = 40; 488 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 489 490 if (set_properties) { 491 set_bit(BTN_MIDDLE, psmouse->dev->keybit); 492 set_bit(REL_WHEEL, psmouse->dev->relbit); 493 set_bit(REL_HWHEEL, psmouse->dev->relbit); 494 set_bit(BTN_SIDE, psmouse->dev->keybit); 495 set_bit(BTN_EXTRA, psmouse->dev->keybit); 496 497 if (!psmouse->vendor) psmouse->vendor = "Generic"; 498 if (!psmouse->name) psmouse->name = "Explorer Mouse"; 499 psmouse->pktsize = 4; 500 } 501 502 return 0; 503 } 504 505 /* 506 * Kensington ThinkingMouse / ExpertMouse magic init. 507 */ 508 static int thinking_detect(struct psmouse *psmouse, int set_properties) 509 { 510 struct ps2dev *ps2dev = &psmouse->ps2dev; 511 unsigned char param[2]; 512 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 513 int i; 514 515 param[0] = 10; 516 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 517 param[0] = 0; 518 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 519 for (i = 0; i < ARRAY_SIZE(seq); i++) { 520 param[0] = seq[i]; 521 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 522 } 523 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 524 525 if (param[0] != 2) 526 return -1; 527 528 if (set_properties) { 529 set_bit(BTN_EXTRA, psmouse->dev->keybit); 530 531 psmouse->vendor = "Kensington"; 532 psmouse->name = "ThinkingMouse"; 533 } 534 535 return 0; 536 } 537 538 /* 539 * Bare PS/2 protocol "detection". Always succeeds. 540 */ 541 static int ps2bare_detect(struct psmouse *psmouse, int set_properties) 542 { 543 if (set_properties) { 544 if (!psmouse->vendor) psmouse->vendor = "Generic"; 545 if (!psmouse->name) psmouse->name = "Mouse"; 546 } 547 548 return 0; 549 } 550 551 /* 552 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 553 * must be forced by sysfs protocol writing. 554 */ 555 static int cortron_detect(struct psmouse *psmouse, int set_properties) 556 { 557 if (set_properties) { 558 psmouse->vendor = "Cortron"; 559 psmouse->name = "PS/2 Trackball"; 560 set_bit(BTN_SIDE, psmouse->dev->keybit); 561 } 562 563 return 0; 564 } 565 566 /* 567 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 568 * the mouse may have. 569 */ 570 571 static int psmouse_extensions(struct psmouse *psmouse, 572 unsigned int max_proto, int set_properties) 573 { 574 int synaptics_hardware = 0; 575 576 /* 577 * We always check for lifebook because it does not disturb mouse 578 * (it only checks DMI information). 579 */ 580 if (lifebook_detect(psmouse, set_properties) == 0) { 581 if (max_proto > PSMOUSE_IMEX) { 582 if (!set_properties || lifebook_init(psmouse) == 0) 583 return PSMOUSE_LIFEBOOK; 584 } 585 } 586 587 /* 588 * Try Kensington ThinkingMouse (we try first, because synaptics probe 589 * upsets the thinkingmouse). 590 */ 591 592 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) 593 return PSMOUSE_THINKPS; 594 595 /* 596 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol 597 * support is disabled in config - we need to know if it is synaptics so we 598 * can reset it properly after probing for intellimouse. 599 */ 600 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { 601 synaptics_hardware = 1; 602 603 if (max_proto > PSMOUSE_IMEX) { 604 if (!set_properties || synaptics_init(psmouse) == 0) 605 return PSMOUSE_SYNAPTICS; 606 /* 607 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). 608 * Unfortunately Logitech/Genius probes confuse some firmware versions so 609 * we'll have to skip them. 610 */ 611 max_proto = PSMOUSE_IMEX; 612 } 613 /* 614 * Make sure that touchpad is in relative mode, gestures (taps) are enabled 615 */ 616 synaptics_reset(psmouse); 617 } 618 619 /* 620 * Try ALPS TouchPad 621 */ 622 if (max_proto > PSMOUSE_IMEX) { 623 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 624 if (alps_detect(psmouse, set_properties) == 0) { 625 if (!set_properties || alps_init(psmouse) == 0) 626 return PSMOUSE_ALPS; 627 /* 628 * Init failed, try basic relative protocols 629 */ 630 max_proto = PSMOUSE_IMEX; 631 } 632 } 633 634 if (max_proto > PSMOUSE_IMEX) { 635 636 if (genius_detect(psmouse, set_properties) == 0) 637 return PSMOUSE_GENPS; 638 639 if (ps2pp_init(psmouse, set_properties) == 0) 640 return PSMOUSE_PS2PP; 641 642 if (trackpoint_detect(psmouse, set_properties) == 0) 643 return PSMOUSE_TRACKPOINT; 644 645 if (touchkit_ps2_detect(psmouse, set_properties) == 0) 646 return PSMOUSE_TOUCHKIT_PS2; 647 } 648 649 /* 650 * Reset to defaults in case the device got confused by extended 651 * protocol probes. Note that we follow up with full reset because 652 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 653 */ 654 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 655 psmouse_reset(psmouse); 656 657 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) 658 return PSMOUSE_IMEX; 659 660 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) 661 return PSMOUSE_IMPS; 662 663 /* 664 * Okay, all failed, we have a standard mouse here. The number of the buttons 665 * is still a question, though. We assume 3. 666 */ 667 ps2bare_detect(psmouse, set_properties); 668 669 if (synaptics_hardware) { 670 /* 671 * We detected Synaptics hardware but it did not respond to IMPS/2 probes. 672 * We need to reset the touchpad because if there is a track point on the 673 * pass through port it could get disabled while probing for protocol 674 * extensions. 675 */ 676 psmouse_reset(psmouse); 677 } 678 679 return PSMOUSE_PS2; 680 } 681 682 static const struct psmouse_protocol psmouse_protocols[] = { 683 { 684 .type = PSMOUSE_PS2, 685 .name = "PS/2", 686 .alias = "bare", 687 .maxproto = 1, 688 .detect = ps2bare_detect, 689 }, 690 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 691 { 692 .type = PSMOUSE_PS2PP, 693 .name = "PS2++", 694 .alias = "logitech", 695 .detect = ps2pp_init, 696 }, 697 #endif 698 { 699 .type = PSMOUSE_THINKPS, 700 .name = "ThinkPS/2", 701 .alias = "thinkps", 702 .detect = thinking_detect, 703 }, 704 { 705 .type = PSMOUSE_GENPS, 706 .name = "GenPS/2", 707 .alias = "genius", 708 .detect = genius_detect, 709 }, 710 { 711 .type = PSMOUSE_IMPS, 712 .name = "ImPS/2", 713 .alias = "imps", 714 .maxproto = 1, 715 .detect = intellimouse_detect, 716 }, 717 { 718 .type = PSMOUSE_IMEX, 719 .name = "ImExPS/2", 720 .alias = "exps", 721 .maxproto = 1, 722 .detect = im_explorer_detect, 723 }, 724 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 725 { 726 .type = PSMOUSE_SYNAPTICS, 727 .name = "SynPS/2", 728 .alias = "synaptics", 729 .detect = synaptics_detect, 730 .init = synaptics_init, 731 }, 732 #endif 733 #ifdef CONFIG_MOUSE_PS2_ALPS 734 { 735 .type = PSMOUSE_ALPS, 736 .name = "AlpsPS/2", 737 .alias = "alps", 738 .detect = alps_detect, 739 .init = alps_init, 740 }, 741 #endif 742 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 743 { 744 .type = PSMOUSE_LIFEBOOK, 745 .name = "LBPS/2", 746 .alias = "lifebook", 747 .init = lifebook_init, 748 }, 749 #endif 750 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 751 { 752 .type = PSMOUSE_TRACKPOINT, 753 .name = "TPPS/2", 754 .alias = "trackpoint", 755 .detect = trackpoint_detect, 756 }, 757 #endif 758 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 759 { 760 .type = PSMOUSE_TOUCHKIT_PS2, 761 .name = "touchkitPS/2", 762 .alias = "touchkit", 763 .detect = touchkit_ps2_detect, 764 }, 765 #endif 766 { 767 .type = PSMOUSE_CORTRON, 768 .name = "CortronPS/2", 769 .alias = "cortps", 770 .detect = cortron_detect, 771 }, 772 { 773 .type = PSMOUSE_AUTO, 774 .name = "auto", 775 .alias = "any", 776 .maxproto = 1, 777 }, 778 }; 779 780 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 781 { 782 int i; 783 784 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 785 if (psmouse_protocols[i].type == type) 786 return &psmouse_protocols[i]; 787 788 WARN_ON(1); 789 return &psmouse_protocols[0]; 790 } 791 792 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 793 { 794 const struct psmouse_protocol *p; 795 int i; 796 797 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 798 p = &psmouse_protocols[i]; 799 800 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 801 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 802 return &psmouse_protocols[i]; 803 } 804 805 return NULL; 806 } 807 808 809 /* 810 * psmouse_probe() probes for a PS/2 mouse. 811 */ 812 813 static int psmouse_probe(struct psmouse *psmouse) 814 { 815 struct ps2dev *ps2dev = &psmouse->ps2dev; 816 unsigned char param[2]; 817 818 /* 819 * First, we check if it's a mouse. It should send 0x00 or 0x03 820 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 821 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent 822 * ID queries, probably due to a firmware bug. 823 */ 824 825 param[0] = 0xa5; 826 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 827 return -1; 828 829 if (param[0] != 0x00 && param[0] != 0x03 && 830 param[0] != 0x04 && param[0] != 0xff) 831 return -1; 832 833 /* 834 * Then we reset and disable the mouse so that it doesn't generate events. 835 */ 836 837 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 838 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); 839 840 return 0; 841 } 842 843 /* 844 * Here we set the mouse resolution. 845 */ 846 847 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 848 { 849 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 850 unsigned char p; 851 852 if (resolution == 0 || resolution > 200) 853 resolution = 200; 854 855 p = params[resolution / 50]; 856 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 857 psmouse->resolution = 25 << p; 858 } 859 860 /* 861 * Here we set the mouse report rate. 862 */ 863 864 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 865 { 866 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 867 unsigned char r; 868 int i = 0; 869 870 while (rates[i] > rate) i++; 871 r = rates[i]; 872 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 873 psmouse->rate = r; 874 } 875 876 /* 877 * psmouse_initialize() initializes the mouse to a sane state. 878 */ 879 880 static void psmouse_initialize(struct psmouse *psmouse) 881 { 882 /* 883 * We set the mouse report rate, resolution and scaling. 884 */ 885 886 if (psmouse_max_proto != PSMOUSE_PS2) { 887 psmouse->set_rate(psmouse, psmouse->rate); 888 psmouse->set_resolution(psmouse, psmouse->resolution); 889 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 890 } 891 } 892 893 /* 894 * psmouse_activate() enables the mouse so that we get motion reports from it. 895 */ 896 897 static void psmouse_activate(struct psmouse *psmouse) 898 { 899 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 900 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", 901 psmouse->ps2dev.serio->phys); 902 903 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 904 } 905 906 907 /* 908 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion 909 * reports from it unless we explicitely request it. 910 */ 911 912 static void psmouse_deactivate(struct psmouse *psmouse) 913 { 914 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 915 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", 916 psmouse->ps2dev.serio->phys); 917 918 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 919 } 920 921 /* 922 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. 923 */ 924 925 static int psmouse_poll(struct psmouse *psmouse) 926 { 927 return ps2_command(&psmouse->ps2dev, psmouse->packet, 928 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 929 } 930 931 932 /* 933 * psmouse_resync() attempts to re-validate current protocol. 934 */ 935 936 static void psmouse_resync(struct work_struct *work) 937 { 938 struct psmouse *parent = NULL, *psmouse = 939 container_of(work, struct psmouse, resync_work); 940 struct serio *serio = psmouse->ps2dev.serio; 941 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 942 int failed = 0, enabled = 0; 943 int i; 944 945 mutex_lock(&psmouse_mutex); 946 947 if (psmouse->state != PSMOUSE_RESYNCING) 948 goto out; 949 950 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 951 parent = serio_get_drvdata(serio->parent); 952 psmouse_deactivate(parent); 953 } 954 955 /* 956 * Some mice don't ACK commands sent while they are in the middle of 957 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 958 * instead of ps2_command() which would wait for 200ms for an ACK 959 * that may never come. 960 * As an additional quirk ALPS touchpads may not only forget to ACK 961 * disable command but will stop reporting taps, so if we see that 962 * mouse at least once ACKs disable we will do full reconnect if ACK 963 * is missing. 964 */ 965 psmouse->num_resyncs++; 966 967 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 968 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 969 failed = 1; 970 } else 971 psmouse->acks_disable_command = 1; 972 973 /* 974 * Poll the mouse. If it was reset the packet will be shorter than 975 * psmouse->pktsize and ps2_command will fail. We do not expect and 976 * do not handle scenario when mouse "upgrades" its protocol while 977 * disconnected since it would require additional delay. If we ever 978 * see a mouse that does it we'll adjust the code. 979 */ 980 if (!failed) { 981 if (psmouse->poll(psmouse)) 982 failed = 1; 983 else { 984 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 985 for (i = 0; i < psmouse->pktsize; i++) { 986 psmouse->pktcnt++; 987 rc = psmouse->protocol_handler(psmouse); 988 if (rc != PSMOUSE_GOOD_DATA) 989 break; 990 } 991 if (rc != PSMOUSE_FULL_PACKET) 992 failed = 1; 993 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 994 } 995 } 996 /* 997 * Now try to enable mouse. We try to do that even if poll failed and also 998 * repeat our attempts 5 times, otherwise we may be left out with disabled 999 * mouse. 1000 */ 1001 for (i = 0; i < 5; i++) { 1002 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1003 enabled = 1; 1004 break; 1005 } 1006 msleep(200); 1007 } 1008 1009 if (!enabled) { 1010 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", 1011 psmouse->ps2dev.serio->phys); 1012 failed = 1; 1013 } 1014 1015 if (failed) { 1016 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1017 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); 1018 serio_reconnect(serio); 1019 } else 1020 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1021 1022 if (parent) 1023 psmouse_activate(parent); 1024 out: 1025 mutex_unlock(&psmouse_mutex); 1026 } 1027 1028 /* 1029 * psmouse_cleanup() resets the mouse into power-on state. 1030 */ 1031 1032 static void psmouse_cleanup(struct serio *serio) 1033 { 1034 struct psmouse *psmouse = serio_get_drvdata(serio); 1035 struct psmouse *parent = NULL; 1036 1037 mutex_lock(&psmouse_mutex); 1038 1039 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1040 parent = serio_get_drvdata(serio->parent); 1041 psmouse_deactivate(parent); 1042 } 1043 1044 psmouse_deactivate(psmouse); 1045 1046 if (psmouse->cleanup) 1047 psmouse->cleanup(psmouse); 1048 1049 psmouse_reset(psmouse); 1050 1051 /* 1052 * Some boxes, such as HP nx7400, get terribly confused if mouse 1053 * is not fully enabled before suspending/shutting down. 1054 */ 1055 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1056 1057 if (parent) { 1058 if (parent->pt_deactivate) 1059 parent->pt_deactivate(parent); 1060 1061 psmouse_activate(parent); 1062 } 1063 1064 mutex_unlock(&psmouse_mutex); 1065 } 1066 1067 /* 1068 * psmouse_disconnect() closes and frees. 1069 */ 1070 1071 static void psmouse_disconnect(struct serio *serio) 1072 { 1073 struct psmouse *psmouse, *parent = NULL; 1074 1075 psmouse = serio_get_drvdata(serio); 1076 1077 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1078 1079 mutex_lock(&psmouse_mutex); 1080 1081 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1082 1083 /* make sure we don't have a resync in progress */ 1084 mutex_unlock(&psmouse_mutex); 1085 flush_workqueue(kpsmoused_wq); 1086 mutex_lock(&psmouse_mutex); 1087 1088 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1089 parent = serio_get_drvdata(serio->parent); 1090 psmouse_deactivate(parent); 1091 } 1092 1093 if (psmouse->disconnect) 1094 psmouse->disconnect(psmouse); 1095 1096 if (parent && parent->pt_deactivate) 1097 parent->pt_deactivate(parent); 1098 1099 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1100 1101 serio_close(serio); 1102 serio_set_drvdata(serio, NULL); 1103 input_unregister_device(psmouse->dev); 1104 kfree(psmouse); 1105 1106 if (parent) 1107 psmouse_activate(parent); 1108 1109 mutex_unlock(&psmouse_mutex); 1110 } 1111 1112 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto) 1113 { 1114 struct input_dev *input_dev = psmouse->dev; 1115 1116 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1117 1118 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL); 1119 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); 1120 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y); 1121 1122 psmouse->set_rate = psmouse_set_rate; 1123 psmouse->set_resolution = psmouse_set_resolution; 1124 psmouse->poll = psmouse_poll; 1125 psmouse->protocol_handler = psmouse_process_byte; 1126 psmouse->pktsize = 3; 1127 1128 if (proto && (proto->detect || proto->init)) { 1129 if (proto->detect && proto->detect(psmouse, 1) < 0) 1130 return -1; 1131 1132 if (proto->init && proto->init(psmouse) < 0) 1133 return -1; 1134 1135 psmouse->type = proto->type; 1136 } 1137 else 1138 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); 1139 1140 /* 1141 * If mouse's packet size is 3 there is no point in polling the 1142 * device in hopes to detect protocol reset - we won't get less 1143 * than 3 bytes response anyhow. 1144 */ 1145 if (psmouse->pktsize == 3) 1146 psmouse->resync_time = 0; 1147 1148 /* 1149 * Some smart KVMs fake response to POLL command returning just 1150 * 3 bytes and messing up our resync logic, so if initial poll 1151 * fails we won't try polling the device anymore. Hopefully 1152 * such KVM will maintain initially selected protocol. 1153 */ 1154 if (psmouse->resync_time && psmouse->poll(psmouse)) 1155 psmouse->resync_time = 0; 1156 1157 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1158 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); 1159 1160 input_dev->name = psmouse->devname; 1161 input_dev->phys = psmouse->phys; 1162 input_dev->id.bustype = BUS_I8042; 1163 input_dev->id.vendor = 0x0002; 1164 input_dev->id.product = psmouse->type; 1165 input_dev->id.version = psmouse->model; 1166 1167 return 0; 1168 } 1169 1170 /* 1171 * psmouse_connect() is a callback from the serio module when 1172 * an unhandled serio port is found. 1173 */ 1174 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1175 { 1176 struct psmouse *psmouse, *parent = NULL; 1177 struct input_dev *input_dev; 1178 int retval = 0, error = -ENOMEM; 1179 1180 mutex_lock(&psmouse_mutex); 1181 1182 /* 1183 * If this is a pass-through port deactivate parent so the device 1184 * connected to this port can be successfully identified 1185 */ 1186 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1187 parent = serio_get_drvdata(serio->parent); 1188 psmouse_deactivate(parent); 1189 } 1190 1191 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1192 input_dev = input_allocate_device(); 1193 if (!psmouse || !input_dev) 1194 goto err_free; 1195 1196 ps2_init(&psmouse->ps2dev, serio); 1197 INIT_WORK(&psmouse->resync_work, psmouse_resync); 1198 psmouse->dev = input_dev; 1199 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1200 1201 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1202 1203 serio_set_drvdata(serio, psmouse); 1204 1205 error = serio_open(serio, drv); 1206 if (error) 1207 goto err_clear_drvdata; 1208 1209 if (psmouse_probe(psmouse) < 0) { 1210 error = -ENODEV; 1211 goto err_close_serio; 1212 } 1213 1214 psmouse->rate = psmouse_rate; 1215 psmouse->resolution = psmouse_resolution; 1216 psmouse->resetafter = psmouse_resetafter; 1217 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1218 psmouse->smartscroll = psmouse_smartscroll; 1219 1220 psmouse_switch_protocol(psmouse, NULL); 1221 1222 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1223 psmouse_initialize(psmouse); 1224 1225 error = input_register_device(psmouse->dev); 1226 if (error) 1227 goto err_protocol_disconnect; 1228 1229 if (parent && parent->pt_activate) 1230 parent->pt_activate(parent); 1231 1232 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1233 if (error) 1234 goto err_pt_deactivate; 1235 1236 psmouse_activate(psmouse); 1237 1238 out: 1239 /* If this is a pass-through port the parent needs to be re-activated */ 1240 if (parent) 1241 psmouse_activate(parent); 1242 1243 mutex_unlock(&psmouse_mutex); 1244 return retval; 1245 1246 err_pt_deactivate: 1247 if (parent && parent->pt_deactivate) 1248 parent->pt_deactivate(parent); 1249 err_protocol_disconnect: 1250 if (psmouse->disconnect) 1251 psmouse->disconnect(psmouse); 1252 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1253 err_close_serio: 1254 serio_close(serio); 1255 err_clear_drvdata: 1256 serio_set_drvdata(serio, NULL); 1257 err_free: 1258 input_free_device(input_dev); 1259 kfree(psmouse); 1260 1261 retval = error; 1262 goto out; 1263 } 1264 1265 1266 static int psmouse_reconnect(struct serio *serio) 1267 { 1268 struct psmouse *psmouse = serio_get_drvdata(serio); 1269 struct psmouse *parent = NULL; 1270 struct serio_driver *drv = serio->drv; 1271 int rc = -1; 1272 1273 if (!drv || !psmouse) { 1274 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); 1275 return -1; 1276 } 1277 1278 mutex_lock(&psmouse_mutex); 1279 1280 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1281 parent = serio_get_drvdata(serio->parent); 1282 psmouse_deactivate(parent); 1283 } 1284 1285 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1286 1287 if (psmouse->reconnect) { 1288 if (psmouse->reconnect(psmouse)) 1289 goto out; 1290 } else if (psmouse_probe(psmouse) < 0 || 1291 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) 1292 goto out; 1293 1294 /* ok, the device type (and capabilities) match the old one, 1295 * we can continue using it, complete intialization 1296 */ 1297 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1298 1299 psmouse_initialize(psmouse); 1300 1301 if (parent && parent->pt_activate) 1302 parent->pt_activate(parent); 1303 1304 psmouse_activate(psmouse); 1305 rc = 0; 1306 1307 out: 1308 /* If this is a pass-through port the parent waits to be activated */ 1309 if (parent) 1310 psmouse_activate(parent); 1311 1312 mutex_unlock(&psmouse_mutex); 1313 return rc; 1314 } 1315 1316 static struct serio_device_id psmouse_serio_ids[] = { 1317 { 1318 .type = SERIO_8042, 1319 .proto = SERIO_ANY, 1320 .id = SERIO_ANY, 1321 .extra = SERIO_ANY, 1322 }, 1323 { 1324 .type = SERIO_PS_PSTHRU, 1325 .proto = SERIO_ANY, 1326 .id = SERIO_ANY, 1327 .extra = SERIO_ANY, 1328 }, 1329 { 0 } 1330 }; 1331 1332 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1333 1334 static struct serio_driver psmouse_drv = { 1335 .driver = { 1336 .name = "psmouse", 1337 }, 1338 .description = DRIVER_DESC, 1339 .id_table = psmouse_serio_ids, 1340 .interrupt = psmouse_interrupt, 1341 .connect = psmouse_connect, 1342 .reconnect = psmouse_reconnect, 1343 .disconnect = psmouse_disconnect, 1344 .cleanup = psmouse_cleanup, 1345 }; 1346 1347 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1348 char *buf) 1349 { 1350 struct serio *serio = to_serio_port(dev); 1351 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1352 struct psmouse *psmouse; 1353 int retval; 1354 1355 retval = serio_pin_driver(serio); 1356 if (retval) 1357 return retval; 1358 1359 if (serio->drv != &psmouse_drv) { 1360 retval = -ENODEV; 1361 goto out; 1362 } 1363 1364 psmouse = serio_get_drvdata(serio); 1365 1366 retval = attr->show(psmouse, attr->data, buf); 1367 1368 out: 1369 serio_unpin_driver(serio); 1370 return retval; 1371 } 1372 1373 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1374 const char *buf, size_t count) 1375 { 1376 struct serio *serio = to_serio_port(dev); 1377 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1378 struct psmouse *psmouse, *parent = NULL; 1379 int retval; 1380 1381 retval = serio_pin_driver(serio); 1382 if (retval) 1383 return retval; 1384 1385 if (serio->drv != &psmouse_drv) { 1386 retval = -ENODEV; 1387 goto out_unpin; 1388 } 1389 1390 retval = mutex_lock_interruptible(&psmouse_mutex); 1391 if (retval) 1392 goto out_unpin; 1393 1394 psmouse = serio_get_drvdata(serio); 1395 1396 if (psmouse->state == PSMOUSE_IGNORE) { 1397 retval = -ENODEV; 1398 goto out_unlock; 1399 } 1400 1401 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1402 parent = serio_get_drvdata(serio->parent); 1403 psmouse_deactivate(parent); 1404 } 1405 1406 psmouse_deactivate(psmouse); 1407 1408 retval = attr->set(psmouse, attr->data, buf, count); 1409 1410 if (retval != -ENODEV) 1411 psmouse_activate(psmouse); 1412 1413 if (parent) 1414 psmouse_activate(parent); 1415 1416 out_unlock: 1417 mutex_unlock(&psmouse_mutex); 1418 out_unpin: 1419 serio_unpin_driver(serio); 1420 return retval; 1421 } 1422 1423 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1424 { 1425 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1426 1427 return sprintf(buf, "%u\n", *field); 1428 } 1429 1430 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1431 { 1432 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1433 unsigned long value; 1434 char *rest; 1435 1436 value = simple_strtoul(buf, &rest, 10); 1437 if (*rest) 1438 return -EINVAL; 1439 1440 if ((unsigned int)value != value) 1441 return -EINVAL; 1442 1443 *field = value; 1444 1445 return count; 1446 } 1447 1448 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1449 { 1450 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); 1451 } 1452 1453 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1454 { 1455 struct serio *serio = psmouse->ps2dev.serio; 1456 struct psmouse *parent = NULL; 1457 struct input_dev *old_dev, *new_dev; 1458 const struct psmouse_protocol *proto, *old_proto; 1459 int error; 1460 int retry = 0; 1461 1462 proto = psmouse_protocol_by_name(buf, count); 1463 if (!proto) 1464 return -EINVAL; 1465 1466 if (psmouse->type == proto->type) 1467 return count; 1468 1469 new_dev = input_allocate_device(); 1470 if (!new_dev) 1471 return -ENOMEM; 1472 1473 while (serio->child) { 1474 if (++retry > 3) { 1475 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); 1476 input_free_device(new_dev); 1477 return -EIO; 1478 } 1479 1480 mutex_unlock(&psmouse_mutex); 1481 serio_unpin_driver(serio); 1482 serio_unregister_child_port(serio); 1483 serio_pin_driver_uninterruptible(serio); 1484 mutex_lock(&psmouse_mutex); 1485 1486 if (serio->drv != &psmouse_drv) { 1487 input_free_device(new_dev); 1488 return -ENODEV; 1489 } 1490 1491 if (psmouse->type == proto->type) { 1492 input_free_device(new_dev); 1493 return count; /* switched by other thread */ 1494 } 1495 } 1496 1497 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1498 parent = serio_get_drvdata(serio->parent); 1499 if (parent->pt_deactivate) 1500 parent->pt_deactivate(parent); 1501 } 1502 1503 old_dev = psmouse->dev; 1504 old_proto = psmouse_protocol_by_type(psmouse->type); 1505 1506 if (psmouse->disconnect) 1507 psmouse->disconnect(psmouse); 1508 1509 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1510 1511 psmouse->dev = new_dev; 1512 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1513 1514 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1515 psmouse_reset(psmouse); 1516 /* default to PSMOUSE_PS2 */ 1517 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1518 } 1519 1520 psmouse_initialize(psmouse); 1521 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1522 1523 error = input_register_device(psmouse->dev); 1524 if (error) { 1525 if (psmouse->disconnect) 1526 psmouse->disconnect(psmouse); 1527 1528 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1529 input_free_device(new_dev); 1530 psmouse->dev = old_dev; 1531 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1532 psmouse_switch_protocol(psmouse, old_proto); 1533 psmouse_initialize(psmouse); 1534 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1535 1536 return error; 1537 } 1538 1539 input_unregister_device(old_dev); 1540 1541 if (parent && parent->pt_activate) 1542 parent->pt_activate(parent); 1543 1544 return count; 1545 } 1546 1547 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1548 { 1549 unsigned long value; 1550 char *rest; 1551 1552 value = simple_strtoul(buf, &rest, 10); 1553 if (*rest) 1554 return -EINVAL; 1555 1556 psmouse->set_rate(psmouse, value); 1557 return count; 1558 } 1559 1560 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1561 { 1562 unsigned long value; 1563 char *rest; 1564 1565 value = simple_strtoul(buf, &rest, 10); 1566 if (*rest) 1567 return -EINVAL; 1568 1569 psmouse->set_resolution(psmouse, value); 1570 return count; 1571 } 1572 1573 1574 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) 1575 { 1576 const struct psmouse_protocol *proto; 1577 1578 if (!val) 1579 return -EINVAL; 1580 1581 proto = psmouse_protocol_by_name(val, strlen(val)); 1582 1583 if (!proto || !proto->maxproto) 1584 return -EINVAL; 1585 1586 *((unsigned int *)kp->arg) = proto->type; 1587 1588 return 0; 1589 } 1590 1591 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) 1592 { 1593 int type = *((unsigned int *)kp->arg); 1594 1595 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 1596 } 1597 1598 static int __init psmouse_init(void) 1599 { 1600 int err; 1601 1602 kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); 1603 if (!kpsmoused_wq) { 1604 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); 1605 return -ENOMEM; 1606 } 1607 1608 err = serio_register_driver(&psmouse_drv); 1609 if (err) 1610 destroy_workqueue(kpsmoused_wq); 1611 1612 return err; 1613 } 1614 1615 static void __exit psmouse_exit(void) 1616 { 1617 serio_unregister_driver(&psmouse_drv); 1618 destroy_workqueue(kpsmoused_wq); 1619 } 1620 1621 module_init(psmouse_init); 1622 module_exit(psmouse_exit); 1623