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