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