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