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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 #define psmouse_fmt(fmt) fmt 16 17 #include <linux/bitops.h> 18 #include <linux/delay.h> 19 #include <linux/module.h> 20 #include <linux/slab.h> 21 #include <linux/interrupt.h> 22 #include <linux/input.h> 23 #include <linux/serio.h> 24 #include <linux/init.h> 25 #include <linux/libps2.h> 26 #include <linux/mutex.h> 27 #include <linux/types.h> 28 29 #include "psmouse.h" 30 #include "synaptics.h" 31 #include "logips2pp.h" 32 #include "alps.h" 33 #include "hgpk.h" 34 #include "lifebook.h" 35 #include "trackpoint.h" 36 #include "touchkit_ps2.h" 37 #include "elantech.h" 38 #include "sentelic.h" 39 #include "cypress_ps2.h" 40 #include "focaltech.h" 41 #include "vmmouse.h" 42 #include "byd.h" 43 44 #define DRIVER_DESC "PS/2 mouse driver" 45 46 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 47 MODULE_DESCRIPTION(DRIVER_DESC); 48 MODULE_LICENSE("GPL"); 49 50 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 51 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 52 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 53 static const struct kernel_param_ops param_ops_proto_abbrev = { 54 .set = psmouse_set_maxproto, 55 .get = psmouse_get_maxproto, 56 }; 57 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 58 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 59 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 60 61 static unsigned int psmouse_resolution = 200; 62 module_param_named(resolution, psmouse_resolution, uint, 0644); 63 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 64 65 static unsigned int psmouse_rate = 100; 66 module_param_named(rate, psmouse_rate, uint, 0644); 67 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 68 69 static bool psmouse_smartscroll = true; 70 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 71 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 72 73 static bool psmouse_a4tech_2wheels; 74 module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644); 75 MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default)."); 76 77 static unsigned int psmouse_resetafter = 5; 78 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 79 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 80 81 static unsigned int psmouse_resync_time; 82 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 83 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 84 85 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 86 NULL, 87 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 88 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 89 (void *) offsetof(struct psmouse, rate), 90 psmouse_show_int_attr, psmouse_attr_set_rate); 91 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 92 (void *) offsetof(struct psmouse, resolution), 93 psmouse_show_int_attr, psmouse_attr_set_resolution); 94 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 95 (void *) offsetof(struct psmouse, resetafter), 96 psmouse_show_int_attr, psmouse_set_int_attr); 97 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 98 (void *) offsetof(struct psmouse, resync_time), 99 psmouse_show_int_attr, psmouse_set_int_attr); 100 101 static struct attribute *psmouse_attributes[] = { 102 &psmouse_attr_protocol.dattr.attr, 103 &psmouse_attr_rate.dattr.attr, 104 &psmouse_attr_resolution.dattr.attr, 105 &psmouse_attr_resetafter.dattr.attr, 106 &psmouse_attr_resync_time.dattr.attr, 107 NULL 108 }; 109 110 static const struct attribute_group psmouse_attribute_group = { 111 .attrs = psmouse_attributes, 112 }; 113 114 /* 115 * psmouse_mutex protects all operations changing state of mouse 116 * (connecting, disconnecting, changing rate or resolution via 117 * sysfs). We could use a per-device semaphore but since there 118 * rarely more than one PS/2 mouse connected and since semaphore 119 * is taken in "slow" paths it is not worth it. 120 */ 121 static DEFINE_MUTEX(psmouse_mutex); 122 123 static struct workqueue_struct *kpsmoused_wq; 124 125 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons) 126 { 127 input_report_key(dev, BTN_LEFT, buttons & BIT(0)); 128 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2)); 129 input_report_key(dev, BTN_RIGHT, buttons & BIT(1)); 130 } 131 132 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet) 133 { 134 int x, y; 135 136 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0; 137 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0; 138 139 input_report_rel(dev, REL_X, x); 140 input_report_rel(dev, REL_Y, -y); 141 } 142 143 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet) 144 { 145 psmouse_report_standard_buttons(dev, packet[0]); 146 psmouse_report_standard_motion(dev, packet); 147 } 148 149 /* 150 * psmouse_process_byte() analyzes the PS/2 data stream and reports 151 * relevant events to the input module once full packet has arrived. 152 */ 153 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 154 { 155 struct input_dev *dev = psmouse->dev; 156 u8 *packet = psmouse->packet; 157 int wheel; 158 159 if (psmouse->pktcnt < psmouse->pktsize) 160 return PSMOUSE_GOOD_DATA; 161 162 /* Full packet accumulated, process it */ 163 164 switch (psmouse->protocol->type) { 165 case PSMOUSE_IMPS: 166 /* IntelliMouse has scroll wheel */ 167 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 168 break; 169 170 case PSMOUSE_IMEX: 171 /* Scroll wheel and buttons on IntelliMouse Explorer */ 172 switch (packet[3] & 0xC0) { 173 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 174 input_report_rel(dev, REL_WHEEL, 175 -sign_extend32(packet[3], 5)); 176 break; 177 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 178 input_report_rel(dev, REL_HWHEEL, 179 -sign_extend32(packet[3], 5)); 180 break; 181 case 0x00: 182 case 0xC0: 183 wheel = sign_extend32(packet[3], 3); 184 185 /* 186 * Some A4Tech mice have two scroll wheels, with first 187 * one reporting +/-1 in the lower nibble, and second 188 * one reporting +/-2. 189 */ 190 if (psmouse_a4tech_2wheels && abs(wheel) > 1) 191 input_report_rel(dev, REL_HWHEEL, wheel / 2); 192 else 193 input_report_rel(dev, REL_WHEEL, -wheel); 194 195 input_report_key(dev, BTN_SIDE, BIT(4)); 196 input_report_key(dev, BTN_EXTRA, BIT(5)); 197 break; 198 } 199 break; 200 201 case PSMOUSE_GENPS: 202 /* Report scroll buttons on NetMice */ 203 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 204 205 /* Extra buttons on Genius NewNet 3D */ 206 input_report_key(dev, BTN_SIDE, BIT(6)); 207 input_report_key(dev, BTN_EXTRA, BIT(7)); 208 break; 209 210 case PSMOUSE_THINKPS: 211 /* Extra button on ThinkingMouse */ 212 input_report_key(dev, BTN_EXTRA, BIT(3)); 213 214 /* 215 * Without this bit of weirdness moving up gives wildly 216 * high Y changes. 217 */ 218 packet[1] |= (packet[0] & 0x40) << 1; 219 break; 220 221 case PSMOUSE_CORTRON: 222 /* 223 * Cortron PS2 Trackball reports SIDE button in the 224 * 4th bit of the first byte. 225 */ 226 input_report_key(dev, BTN_SIDE, BIT(3)); 227 packet[0] |= BIT(3); 228 break; 229 230 default: 231 break; 232 } 233 234 /* Generic PS/2 Mouse */ 235 packet[0] |= psmouse->extra_buttons; 236 psmouse_report_standard_packet(dev, packet); 237 238 input_sync(dev); 239 240 return PSMOUSE_FULL_PACKET; 241 } 242 243 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 244 unsigned long delay) 245 { 246 queue_delayed_work(kpsmoused_wq, work, delay); 247 } 248 249 /* 250 * __psmouse_set_state() sets new psmouse state and resets all flags. 251 */ 252 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 253 { 254 psmouse->state = new_state; 255 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 256 psmouse->ps2dev.flags = 0; 257 psmouse->last = jiffies; 258 } 259 260 /* 261 * psmouse_set_state() sets new psmouse state and resets all flags and 262 * counters while holding serio lock so fighting with interrupt handler 263 * is not a concern. 264 */ 265 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 266 { 267 serio_pause_rx(psmouse->ps2dev.serio); 268 __psmouse_set_state(psmouse, new_state); 269 serio_continue_rx(psmouse->ps2dev.serio); 270 } 271 272 /* 273 * psmouse_handle_byte() processes one byte of the input data stream 274 * by calling corresponding protocol handler. 275 */ 276 static int psmouse_handle_byte(struct psmouse *psmouse) 277 { 278 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 279 280 switch (rc) { 281 case PSMOUSE_BAD_DATA: 282 if (psmouse->state == PSMOUSE_ACTIVATED) { 283 psmouse_warn(psmouse, 284 "%s at %s lost sync at byte %d\n", 285 psmouse->name, psmouse->phys, 286 psmouse->pktcnt); 287 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 288 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 289 psmouse_notice(psmouse, 290 "issuing reconnect request\n"); 291 serio_reconnect(psmouse->ps2dev.serio); 292 return -EIO; 293 } 294 } 295 psmouse->pktcnt = 0; 296 break; 297 298 case PSMOUSE_FULL_PACKET: 299 psmouse->pktcnt = 0; 300 if (psmouse->out_of_sync_cnt) { 301 psmouse->out_of_sync_cnt = 0; 302 psmouse_notice(psmouse, 303 "%s at %s - driver resynced.\n", 304 psmouse->name, psmouse->phys); 305 } 306 break; 307 308 case PSMOUSE_GOOD_DATA: 309 break; 310 } 311 return 0; 312 } 313 314 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data) 315 { 316 switch (psmouse->oob_data_type) { 317 case PSMOUSE_OOB_NONE: 318 psmouse->oob_data_type = data; 319 break; 320 321 case PSMOUSE_OOB_EXTRA_BTNS: 322 psmouse_report_standard_buttons(psmouse->dev, data); 323 input_sync(psmouse->dev); 324 325 psmouse->extra_buttons = data; 326 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 327 break; 328 329 default: 330 psmouse_warn(psmouse, 331 "unknown OOB_DATA type: 0x%02x\n", 332 psmouse->oob_data_type); 333 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 334 break; 335 } 336 } 337 338 /* 339 * psmouse_interrupt() handles incoming characters, either passing them 340 * for normal processing or gathering them as command response. 341 */ 342 static irqreturn_t psmouse_interrupt(struct serio *serio, 343 u8 data, unsigned int flags) 344 { 345 struct psmouse *psmouse = serio_get_drvdata(serio); 346 347 if (psmouse->state == PSMOUSE_IGNORE) 348 goto out; 349 350 if (unlikely((flags & SERIO_TIMEOUT) || 351 ((flags & SERIO_PARITY) && 352 !psmouse->protocol->ignore_parity))) { 353 354 if (psmouse->state == PSMOUSE_ACTIVATED) 355 psmouse_warn(psmouse, 356 "bad data from KBC -%s%s\n", 357 flags & SERIO_TIMEOUT ? " timeout" : "", 358 flags & SERIO_PARITY ? " bad parity" : ""); 359 ps2_cmd_aborted(&psmouse->ps2dev); 360 goto out; 361 } 362 363 if (flags & SERIO_OOB_DATA) { 364 psmouse_handle_oob_data(psmouse, data); 365 goto out; 366 } 367 368 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 369 if (ps2_handle_ack(&psmouse->ps2dev, data)) 370 goto out; 371 372 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 373 if (ps2_handle_response(&psmouse->ps2dev, data)) 374 goto out; 375 376 if (psmouse->state <= PSMOUSE_RESYNCING) 377 goto out; 378 379 if (psmouse->state == PSMOUSE_ACTIVATED && 380 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 381 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 382 psmouse->name, psmouse->phys, psmouse->pktcnt); 383 psmouse->badbyte = psmouse->packet[0]; 384 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 385 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 386 goto out; 387 } 388 389 psmouse->packet[psmouse->pktcnt++] = data; 390 391 /* Check if this is a new device announcement (0xAA 0x00) */ 392 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 393 if (psmouse->pktcnt == 1) { 394 psmouse->last = jiffies; 395 goto out; 396 } 397 398 if (psmouse->packet[1] == PSMOUSE_RET_ID || 399 (psmouse->protocol->type == PSMOUSE_HGPK && 400 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 401 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 402 serio_reconnect(serio); 403 goto out; 404 } 405 406 /* Not a new device, try processing first byte normally */ 407 psmouse->pktcnt = 1; 408 if (psmouse_handle_byte(psmouse)) 409 goto out; 410 411 psmouse->packet[psmouse->pktcnt++] = data; 412 } 413 414 /* 415 * See if we need to force resync because mouse was idle for 416 * too long. 417 */ 418 if (psmouse->state == PSMOUSE_ACTIVATED && 419 psmouse->pktcnt == 1 && psmouse->resync_time && 420 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 421 psmouse->badbyte = psmouse->packet[0]; 422 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 423 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 424 goto out; 425 } 426 427 psmouse->last = jiffies; 428 psmouse_handle_byte(psmouse); 429 430 out: 431 return IRQ_HANDLED; 432 } 433 434 /* 435 * psmouse_reset() resets the mouse into power-on state. 436 */ 437 int psmouse_reset(struct psmouse *psmouse) 438 { 439 u8 param[2]; 440 int error; 441 442 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT); 443 if (error) 444 return error; 445 446 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 447 return -EIO; 448 449 return 0; 450 } 451 452 /* 453 * Here we set the mouse resolution. 454 */ 455 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 456 { 457 static const u8 params[] = { 0, 1, 2, 2, 3 }; 458 u8 p; 459 460 if (resolution == 0 || resolution > 200) 461 resolution = 200; 462 463 p = params[resolution / 50]; 464 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 465 psmouse->resolution = 25 << p; 466 } 467 468 /* 469 * Here we set the mouse report rate. 470 */ 471 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 472 { 473 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 474 u8 r; 475 int i = 0; 476 477 while (rates[i] > rate) 478 i++; 479 r = rates[i]; 480 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 481 psmouse->rate = r; 482 } 483 484 /* 485 * Here we set the mouse scaling. 486 */ 487 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale) 488 { 489 ps2_command(&psmouse->ps2dev, NULL, 490 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 : 491 PSMOUSE_CMD_SETSCALE11); 492 } 493 494 /* 495 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it. 496 */ 497 static int psmouse_poll(struct psmouse *psmouse) 498 { 499 return ps2_command(&psmouse->ps2dev, psmouse->packet, 500 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 501 } 502 503 static bool psmouse_check_pnp_id(const char *id, const char * const ids[]) 504 { 505 int i; 506 507 for (i = 0; ids[i]; i++) 508 if (!strcasecmp(id, ids[i])) 509 return true; 510 511 return false; 512 } 513 514 /* 515 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids. 516 */ 517 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[]) 518 { 519 struct serio *serio = psmouse->ps2dev.serio; 520 char *p, *fw_id_copy, *save_ptr; 521 bool found = false; 522 523 if (strncmp(serio->firmware_id, "PNP: ", 5)) 524 return false; 525 526 fw_id_copy = kstrndup(&serio->firmware_id[5], 527 sizeof(serio->firmware_id) - 5, 528 GFP_KERNEL); 529 if (!fw_id_copy) 530 return false; 531 532 save_ptr = fw_id_copy; 533 while ((p = strsep(&fw_id_copy, " ")) != NULL) { 534 if (psmouse_check_pnp_id(p, ids)) { 535 found = true; 536 break; 537 } 538 } 539 540 kfree(save_ptr); 541 return found; 542 } 543 544 /* 545 * Genius NetMouse magic init. 546 */ 547 static int genius_detect(struct psmouse *psmouse, bool set_properties) 548 { 549 struct ps2dev *ps2dev = &psmouse->ps2dev; 550 u8 param[4]; 551 552 param[0] = 3; 553 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 554 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 555 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 556 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 557 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 558 559 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 560 return -ENODEV; 561 562 if (set_properties) { 563 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 564 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 565 __set_bit(BTN_SIDE, psmouse->dev->keybit); 566 __set_bit(REL_WHEEL, psmouse->dev->relbit); 567 568 psmouse->vendor = "Genius"; 569 psmouse->name = "Mouse"; 570 psmouse->pktsize = 4; 571 } 572 573 return 0; 574 } 575 576 /* 577 * IntelliMouse magic init. 578 */ 579 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 580 { 581 struct ps2dev *ps2dev = &psmouse->ps2dev; 582 u8 param[2]; 583 584 param[0] = 200; 585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 586 param[0] = 100; 587 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 588 param[0] = 80; 589 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 590 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 591 592 if (param[0] != 3) 593 return -ENODEV; 594 595 if (set_properties) { 596 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 597 __set_bit(REL_WHEEL, psmouse->dev->relbit); 598 599 if (!psmouse->vendor) 600 psmouse->vendor = "Generic"; 601 if (!psmouse->name) 602 psmouse->name = "Wheel Mouse"; 603 psmouse->pktsize = 4; 604 } 605 606 return 0; 607 } 608 609 /* 610 * Try IntelliMouse/Explorer magic init. 611 */ 612 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 613 { 614 struct ps2dev *ps2dev = &psmouse->ps2dev; 615 u8 param[2]; 616 617 intellimouse_detect(psmouse, 0); 618 619 param[0] = 200; 620 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 621 param[0] = 200; 622 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 623 param[0] = 80; 624 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 625 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 626 627 if (param[0] != 4) 628 return -ENODEV; 629 630 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 631 param[0] = 200; 632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 633 param[0] = 80; 634 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 635 param[0] = 40; 636 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 637 638 if (set_properties) { 639 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 640 __set_bit(REL_WHEEL, psmouse->dev->relbit); 641 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 642 __set_bit(BTN_SIDE, psmouse->dev->keybit); 643 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 644 645 if (!psmouse->vendor) 646 psmouse->vendor = "Generic"; 647 if (!psmouse->name) 648 psmouse->name = "Explorer Mouse"; 649 psmouse->pktsize = 4; 650 } 651 652 return 0; 653 } 654 655 /* 656 * Kensington ThinkingMouse / ExpertMouse magic init. 657 */ 658 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 659 { 660 struct ps2dev *ps2dev = &psmouse->ps2dev; 661 u8 param[2]; 662 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 663 int i; 664 665 param[0] = 10; 666 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 667 param[0] = 0; 668 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 669 for (i = 0; i < ARRAY_SIZE(seq); i++) { 670 param[0] = seq[i]; 671 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 672 } 673 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 674 675 if (param[0] != 2) 676 return -ENODEV; 677 678 if (set_properties) { 679 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 680 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 681 682 psmouse->vendor = "Kensington"; 683 psmouse->name = "ThinkingMouse"; 684 } 685 686 return 0; 687 } 688 689 /* 690 * Bare PS/2 protocol "detection". Always succeeds. 691 */ 692 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 693 { 694 if (set_properties) { 695 if (!psmouse->vendor) 696 psmouse->vendor = "Generic"; 697 if (!psmouse->name) 698 psmouse->name = "Mouse"; 699 700 /* 701 * We have no way of figuring true number of buttons so let's 702 * assume that the device has 3. 703 */ 704 input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE); 705 } 706 707 return 0; 708 } 709 710 /* 711 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 712 * must be forced by sysfs protocol writing. 713 */ 714 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 715 { 716 if (set_properties) { 717 psmouse->vendor = "Cortron"; 718 psmouse->name = "PS/2 Trackball"; 719 720 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 721 __set_bit(BTN_SIDE, psmouse->dev->keybit); 722 } 723 724 return 0; 725 } 726 727 static const struct psmouse_protocol psmouse_protocols[] = { 728 { 729 .type = PSMOUSE_PS2, 730 .name = "PS/2", 731 .alias = "bare", 732 .maxproto = true, 733 .ignore_parity = true, 734 .detect = ps2bare_detect, 735 .try_passthru = true, 736 }, 737 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 738 { 739 .type = PSMOUSE_PS2PP, 740 .name = "PS2++", 741 .alias = "logitech", 742 .detect = ps2pp_detect, 743 }, 744 #endif 745 { 746 .type = PSMOUSE_THINKPS, 747 .name = "ThinkPS/2", 748 .alias = "thinkps", 749 .detect = thinking_detect, 750 }, 751 #ifdef CONFIG_MOUSE_PS2_CYPRESS 752 { 753 .type = PSMOUSE_CYPRESS, 754 .name = "CyPS/2", 755 .alias = "cypress", 756 .detect = cypress_detect, 757 .init = cypress_init, 758 }, 759 #endif 760 { 761 .type = PSMOUSE_GENPS, 762 .name = "GenPS/2", 763 .alias = "genius", 764 .detect = genius_detect, 765 }, 766 { 767 .type = PSMOUSE_IMPS, 768 .name = "ImPS/2", 769 .alias = "imps", 770 .maxproto = true, 771 .ignore_parity = true, 772 .detect = intellimouse_detect, 773 .try_passthru = true, 774 }, 775 { 776 .type = PSMOUSE_IMEX, 777 .name = "ImExPS/2", 778 .alias = "exps", 779 .maxproto = true, 780 .ignore_parity = true, 781 .detect = im_explorer_detect, 782 .try_passthru = true, 783 }, 784 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 785 { 786 .type = PSMOUSE_SYNAPTICS, 787 .name = "SynPS/2", 788 .alias = "synaptics", 789 .detect = synaptics_detect, 790 .init = synaptics_init_absolute, 791 }, 792 { 793 .type = PSMOUSE_SYNAPTICS_RELATIVE, 794 .name = "SynRelPS/2", 795 .alias = "synaptics-relative", 796 .detect = synaptics_detect, 797 .init = synaptics_init_relative, 798 }, 799 #endif 800 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 801 { 802 .type = PSMOUSE_SYNAPTICS_SMBUS, 803 .name = "SynSMBus", 804 .alias = "synaptics-smbus", 805 .detect = synaptics_detect, 806 .init = synaptics_init_smbus, 807 .smbus_companion = true, 808 }, 809 #endif 810 #ifdef CONFIG_MOUSE_PS2_ALPS 811 { 812 .type = PSMOUSE_ALPS, 813 .name = "AlpsPS/2", 814 .alias = "alps", 815 .detect = alps_detect, 816 .init = alps_init, 817 }, 818 #endif 819 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 820 { 821 .type = PSMOUSE_LIFEBOOK, 822 .name = "LBPS/2", 823 .alias = "lifebook", 824 .detect = lifebook_detect, 825 .init = lifebook_init, 826 }, 827 #endif 828 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 829 { 830 .type = PSMOUSE_TRACKPOINT, 831 .name = "TPPS/2", 832 .alias = "trackpoint", 833 .detect = trackpoint_detect, 834 .try_passthru = true, 835 }, 836 #endif 837 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 838 { 839 .type = PSMOUSE_TOUCHKIT_PS2, 840 .name = "touchkitPS/2", 841 .alias = "touchkit", 842 .detect = touchkit_ps2_detect, 843 }, 844 #endif 845 #ifdef CONFIG_MOUSE_PS2_OLPC 846 { 847 .type = PSMOUSE_HGPK, 848 .name = "OLPC HGPK", 849 .alias = "hgpk", 850 .detect = hgpk_detect, 851 }, 852 #endif 853 #ifdef CONFIG_MOUSE_PS2_ELANTECH 854 { 855 .type = PSMOUSE_ELANTECH, 856 .name = "ETPS/2", 857 .alias = "elantech", 858 .detect = elantech_detect, 859 .init = elantech_init_ps2, 860 }, 861 #endif 862 #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS 863 { 864 .type = PSMOUSE_ELANTECH_SMBUS, 865 .name = "ETSMBus", 866 .alias = "elantech-smbus", 867 .detect = elantech_detect, 868 .init = elantech_init_smbus, 869 .smbus_companion = true, 870 }, 871 #endif 872 #ifdef CONFIG_MOUSE_PS2_SENTELIC 873 { 874 .type = PSMOUSE_FSP, 875 .name = "FSPPS/2", 876 .alias = "fsp", 877 .detect = fsp_detect, 878 .init = fsp_init, 879 }, 880 #endif 881 { 882 .type = PSMOUSE_CORTRON, 883 .name = "CortronPS/2", 884 .alias = "cortps", 885 .detect = cortron_detect, 886 }, 887 #ifdef CONFIG_MOUSE_PS2_FOCALTECH 888 { 889 .type = PSMOUSE_FOCALTECH, 890 .name = "FocalTechPS/2", 891 .alias = "focaltech", 892 .detect = focaltech_detect, 893 .init = focaltech_init, 894 }, 895 #endif 896 #ifdef CONFIG_MOUSE_PS2_VMMOUSE 897 { 898 .type = PSMOUSE_VMMOUSE, 899 .name = VMMOUSE_PSNAME, 900 .alias = "vmmouse", 901 .detect = vmmouse_detect, 902 .init = vmmouse_init, 903 }, 904 #endif 905 #ifdef CONFIG_MOUSE_PS2_BYD 906 { 907 .type = PSMOUSE_BYD, 908 .name = "BYDPS/2", 909 .alias = "byd", 910 .detect = byd_detect, 911 .init = byd_init, 912 }, 913 #endif 914 { 915 .type = PSMOUSE_AUTO, 916 .name = "auto", 917 .alias = "any", 918 .maxproto = true, 919 }, 920 }; 921 922 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type) 923 { 924 int i; 925 926 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 927 if (psmouse_protocols[i].type == type) 928 return &psmouse_protocols[i]; 929 930 return NULL; 931 } 932 933 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 934 { 935 const struct psmouse_protocol *proto; 936 937 proto = __psmouse_protocol_by_type(type); 938 if (proto) 939 return proto; 940 941 WARN_ON(1); 942 return &psmouse_protocols[0]; 943 } 944 945 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 946 { 947 const struct psmouse_protocol *p; 948 int i; 949 950 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 951 p = &psmouse_protocols[i]; 952 953 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 954 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 955 return &psmouse_protocols[i]; 956 } 957 958 return NULL; 959 } 960 961 /* 962 * Apply default settings to the psmouse structure. Most of them will 963 * be overridden by individual protocol initialization routines. 964 */ 965 static void psmouse_apply_defaults(struct psmouse *psmouse) 966 { 967 struct input_dev *input_dev = psmouse->dev; 968 969 bitmap_zero(input_dev->evbit, EV_CNT); 970 bitmap_zero(input_dev->keybit, KEY_CNT); 971 bitmap_zero(input_dev->relbit, REL_CNT); 972 bitmap_zero(input_dev->absbit, ABS_CNT); 973 bitmap_zero(input_dev->mscbit, MSC_CNT); 974 975 input_set_capability(input_dev, EV_KEY, BTN_LEFT); 976 input_set_capability(input_dev, EV_KEY, BTN_RIGHT); 977 978 input_set_capability(input_dev, EV_REL, REL_X); 979 input_set_capability(input_dev, EV_REL, REL_Y); 980 981 __set_bit(INPUT_PROP_POINTER, input_dev->propbit); 982 983 psmouse->protocol = &psmouse_protocols[0]; 984 985 psmouse->set_rate = psmouse_set_rate; 986 psmouse->set_resolution = psmouse_set_resolution; 987 psmouse->set_scale = psmouse_set_scale; 988 psmouse->poll = psmouse_poll; 989 psmouse->protocol_handler = psmouse_process_byte; 990 psmouse->pktsize = 3; 991 psmouse->reconnect = NULL; 992 psmouse->fast_reconnect = NULL; 993 psmouse->disconnect = NULL; 994 psmouse->cleanup = NULL; 995 psmouse->pt_activate = NULL; 996 psmouse->pt_deactivate = NULL; 997 } 998 999 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool), 1000 struct psmouse *psmouse, bool allow_passthrough, 1001 bool set_properties) 1002 { 1003 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 1004 !allow_passthrough) { 1005 return false; 1006 } 1007 1008 if (set_properties) 1009 psmouse_apply_defaults(psmouse); 1010 1011 return detect(psmouse, set_properties) == 0; 1012 } 1013 1014 static bool psmouse_try_protocol(struct psmouse *psmouse, 1015 enum psmouse_type type, 1016 unsigned int *max_proto, 1017 bool set_properties, bool init_allowed) 1018 { 1019 const struct psmouse_protocol *proto; 1020 1021 proto = __psmouse_protocol_by_type(type); 1022 if (!proto) 1023 return false; 1024 1025 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru, 1026 set_properties)) 1027 return false; 1028 1029 if (set_properties && proto->init && init_allowed) { 1030 if (proto->init(psmouse) != 0) { 1031 /* 1032 * We detected device, but init failed. Adjust 1033 * max_proto so we only try standard protocols. 1034 */ 1035 if (*max_proto > PSMOUSE_IMEX) 1036 *max_proto = PSMOUSE_IMEX; 1037 1038 return false; 1039 } 1040 } 1041 1042 return true; 1043 } 1044 1045 /* 1046 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 1047 * the mouse may have. 1048 */ 1049 static int psmouse_extensions(struct psmouse *psmouse, 1050 unsigned int max_proto, bool set_properties) 1051 { 1052 bool synaptics_hardware = false; 1053 int ret; 1054 1055 /* 1056 * Always check for focaltech, this is safe as it uses pnp-id 1057 * matching. 1058 */ 1059 if (psmouse_do_detect(focaltech_detect, 1060 psmouse, false, set_properties)) { 1061 if (max_proto > PSMOUSE_IMEX && 1062 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 1063 (!set_properties || focaltech_init(psmouse) == 0)) { 1064 return PSMOUSE_FOCALTECH; 1065 } 1066 /* 1067 * Restrict psmouse_max_proto so that psmouse_initialize() 1068 * does not try to reset rate and resolution, because even 1069 * that upsets the device. 1070 * This also causes us to basically fall through to basic 1071 * protocol detection, where we fully reset the mouse, 1072 * and set it up as bare PS/2 protocol device. 1073 */ 1074 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1075 } 1076 1077 /* 1078 * We always check for LifeBook because it does not disturb mouse 1079 * (it only checks DMI information). 1080 */ 1081 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1082 set_properties, max_proto > PSMOUSE_IMEX)) 1083 return PSMOUSE_LIFEBOOK; 1084 1085 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1086 set_properties, max_proto > PSMOUSE_IMEX)) 1087 return PSMOUSE_VMMOUSE; 1088 1089 /* 1090 * Try Kensington ThinkingMouse (we try first, because Synaptics 1091 * probe upsets the ThinkingMouse). 1092 */ 1093 if (max_proto > PSMOUSE_IMEX && 1094 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1095 set_properties, true)) { 1096 return PSMOUSE_THINKPS; 1097 } 1098 1099 /* 1100 * Try Synaptics TouchPad. Note that probing is done even if 1101 * Synaptics protocol support is disabled in config - we need to 1102 * know if it is Synaptics so we can reset it properly after 1103 * probing for IntelliMouse. 1104 */ 1105 if (max_proto > PSMOUSE_PS2 && 1106 psmouse_do_detect(synaptics_detect, 1107 psmouse, false, set_properties)) { 1108 synaptics_hardware = true; 1109 1110 if (max_proto > PSMOUSE_IMEX) { 1111 /* 1112 * Try activating protocol, but check if support is 1113 * enabled first, since we try detecting Synaptics 1114 * even when protocol is disabled. 1115 */ 1116 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || 1117 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { 1118 if (!set_properties) 1119 return PSMOUSE_SYNAPTICS; 1120 1121 ret = synaptics_init(psmouse); 1122 if (ret >= 0) 1123 return ret; 1124 } 1125 1126 /* 1127 * Some Synaptics touchpads can emulate extended 1128 * protocols (like IMPS/2). Unfortunately 1129 * Logitech/Genius probes confuse some firmware 1130 * versions so we'll have to skip them. 1131 */ 1132 max_proto = PSMOUSE_IMEX; 1133 } 1134 1135 /* 1136 * Make sure that touchpad is in relative mode, gestures 1137 * (taps) are enabled. 1138 */ 1139 synaptics_reset(psmouse); 1140 } 1141 1142 /* 1143 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1144 * because Finger Sensing Pad probe upsets some modules of Cypress 1145 * Trackpads. 1146 */ 1147 if (max_proto > PSMOUSE_IMEX && 1148 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1149 set_properties, true)) { 1150 return PSMOUSE_CYPRESS; 1151 } 1152 1153 /* Try ALPS TouchPad */ 1154 if (max_proto > PSMOUSE_IMEX) { 1155 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1156 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1157 &max_proto, set_properties, true)) 1158 return PSMOUSE_ALPS; 1159 } 1160 1161 /* Try OLPC HGPK touchpad */ 1162 if (max_proto > PSMOUSE_IMEX && 1163 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1164 set_properties, true)) { 1165 return PSMOUSE_HGPK; 1166 } 1167 1168 /* Try Elantech touchpad */ 1169 if (max_proto > PSMOUSE_IMEX && 1170 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1171 &max_proto, set_properties, false)) { 1172 if (!set_properties) 1173 return PSMOUSE_ELANTECH; 1174 1175 ret = elantech_init(psmouse); 1176 if (ret >= 0) 1177 return ret; 1178 } 1179 1180 if (max_proto > PSMOUSE_IMEX) { 1181 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1182 &max_proto, set_properties, true)) 1183 return PSMOUSE_GENPS; 1184 1185 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1186 &max_proto, set_properties, true)) 1187 return PSMOUSE_PS2PP; 1188 1189 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1190 &max_proto, set_properties, true)) 1191 return PSMOUSE_TRACKPOINT; 1192 1193 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1194 &max_proto, set_properties, true)) 1195 return PSMOUSE_TOUCHKIT_PS2; 1196 } 1197 1198 /* 1199 * Try Finger Sensing Pad. We do it here because its probe upsets 1200 * Trackpoint devices (causing TP_READ_ID command to time out). 1201 */ 1202 if (max_proto > PSMOUSE_IMEX && 1203 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1204 &max_proto, set_properties, true)) { 1205 return PSMOUSE_FSP; 1206 } 1207 1208 /* 1209 * Reset to defaults in case the device got confused by extended 1210 * protocol probes. Note that we follow up with full reset because 1211 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1212 */ 1213 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1214 psmouse_reset(psmouse); 1215 1216 if (max_proto >= PSMOUSE_IMEX && 1217 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1218 &max_proto, set_properties, true)) { 1219 return PSMOUSE_IMEX; 1220 } 1221 1222 if (max_proto >= PSMOUSE_IMPS && 1223 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1224 &max_proto, set_properties, true)) { 1225 return PSMOUSE_IMPS; 1226 } 1227 1228 /* 1229 * Okay, all failed, we have a standard mouse here. The number of 1230 * the buttons is still a question, though. We assume 3. 1231 */ 1232 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1233 &max_proto, set_properties, true); 1234 1235 if (synaptics_hardware) { 1236 /* 1237 * We detected Synaptics hardware but it did not respond to 1238 * IMPS/2 probes. We need to reset the touchpad because if 1239 * there is a track point on the pass through port it could 1240 * get disabled while probing for protocol extensions. 1241 */ 1242 psmouse_reset(psmouse); 1243 } 1244 1245 return PSMOUSE_PS2; 1246 } 1247 1248 /* 1249 * psmouse_probe() probes for a PS/2 mouse. 1250 */ 1251 static int psmouse_probe(struct psmouse *psmouse) 1252 { 1253 struct ps2dev *ps2dev = &psmouse->ps2dev; 1254 u8 param[2]; 1255 int error; 1256 1257 /* 1258 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1259 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1260 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1261 * subsequent ID queries, probably due to a firmware bug. 1262 */ 1263 param[0] = 0xa5; 1264 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 1265 if (error) 1266 return error; 1267 1268 if (param[0] != 0x00 && param[0] != 0x03 && 1269 param[0] != 0x04 && param[0] != 0xff) 1270 return -ENODEV; 1271 1272 /* 1273 * Then we reset and disable the mouse so that it doesn't generate 1274 * events. 1275 */ 1276 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1277 if (error) 1278 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n", 1279 ps2dev->serio->phys, error); 1280 1281 return 0; 1282 } 1283 1284 /* 1285 * psmouse_initialize() initializes the mouse to a sane state. 1286 */ 1287 static void psmouse_initialize(struct psmouse *psmouse) 1288 { 1289 /* 1290 * We set the mouse report rate, resolution and scaling. 1291 */ 1292 if (psmouse_max_proto != PSMOUSE_PS2) { 1293 psmouse->set_rate(psmouse, psmouse->rate); 1294 psmouse->set_resolution(psmouse, psmouse->resolution); 1295 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1296 } 1297 } 1298 1299 /* 1300 * psmouse_activate() enables the mouse so that we get motion reports from it. 1301 */ 1302 int psmouse_activate(struct psmouse *psmouse) 1303 { 1304 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1305 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1306 psmouse->ps2dev.serio->phys); 1307 return -1; 1308 } 1309 1310 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1311 return 0; 1312 } 1313 1314 /* 1315 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1316 * motion reports from it unless we explicitly request it. 1317 */ 1318 int psmouse_deactivate(struct psmouse *psmouse) 1319 { 1320 int error; 1321 1322 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE); 1323 if (error) { 1324 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n", 1325 psmouse->ps2dev.serio->phys, error); 1326 return error; 1327 } 1328 1329 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1330 return 0; 1331 } 1332 1333 /* 1334 * psmouse_resync() attempts to re-validate current protocol. 1335 */ 1336 static void psmouse_resync(struct work_struct *work) 1337 { 1338 struct psmouse *parent = NULL, *psmouse = 1339 container_of(work, struct psmouse, resync_work.work); 1340 struct serio *serio = psmouse->ps2dev.serio; 1341 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1342 bool failed = false, enabled = false; 1343 int i; 1344 1345 mutex_lock(&psmouse_mutex); 1346 1347 if (psmouse->state != PSMOUSE_RESYNCING) 1348 goto out; 1349 1350 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1351 parent = serio_get_drvdata(serio->parent); 1352 psmouse_deactivate(parent); 1353 } 1354 1355 /* 1356 * Some mice don't ACK commands sent while they are in the middle of 1357 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1358 * instead of ps2_command() which would wait for 200ms for an ACK 1359 * that may never come. 1360 * As an additional quirk ALPS touchpads may not only forget to ACK 1361 * disable command but will stop reporting taps, so if we see that 1362 * mouse at least once ACKs disable we will do full reconnect if ACK 1363 * is missing. 1364 */ 1365 psmouse->num_resyncs++; 1366 1367 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1368 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1369 failed = true; 1370 } else 1371 psmouse->acks_disable_command = true; 1372 1373 /* 1374 * Poll the mouse. If it was reset the packet will be shorter than 1375 * psmouse->pktsize and ps2_command will fail. We do not expect and 1376 * do not handle scenario when mouse "upgrades" its protocol while 1377 * disconnected since it would require additional delay. If we ever 1378 * see a mouse that does it we'll adjust the code. 1379 */ 1380 if (!failed) { 1381 if (psmouse->poll(psmouse)) 1382 failed = true; 1383 else { 1384 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1385 for (i = 0; i < psmouse->pktsize; i++) { 1386 psmouse->pktcnt++; 1387 rc = psmouse->protocol_handler(psmouse); 1388 if (rc != PSMOUSE_GOOD_DATA) 1389 break; 1390 } 1391 if (rc != PSMOUSE_FULL_PACKET) 1392 failed = true; 1393 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1394 } 1395 } 1396 1397 /* 1398 * Now try to enable mouse. We try to do that even if poll failed 1399 * and also repeat our attempts 5 times, otherwise we may be left 1400 * out with disabled mouse. 1401 */ 1402 for (i = 0; i < 5; i++) { 1403 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1404 enabled = true; 1405 break; 1406 } 1407 msleep(200); 1408 } 1409 1410 if (!enabled) { 1411 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1412 psmouse->ps2dev.serio->phys); 1413 failed = true; 1414 } 1415 1416 if (failed) { 1417 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1418 psmouse_info(psmouse, 1419 "resync failed, issuing reconnect request\n"); 1420 serio_reconnect(serio); 1421 } else 1422 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1423 1424 if (parent) 1425 psmouse_activate(parent); 1426 out: 1427 mutex_unlock(&psmouse_mutex); 1428 } 1429 1430 /* 1431 * psmouse_cleanup() resets the mouse into power-on state. 1432 */ 1433 static void psmouse_cleanup(struct serio *serio) 1434 { 1435 struct psmouse *psmouse = serio_get_drvdata(serio); 1436 struct psmouse *parent = NULL; 1437 1438 mutex_lock(&psmouse_mutex); 1439 1440 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1441 parent = serio_get_drvdata(serio->parent); 1442 psmouse_deactivate(parent); 1443 } 1444 1445 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1446 1447 /* 1448 * Disable stream mode so cleanup routine can proceed undisturbed. 1449 */ 1450 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1451 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1452 psmouse->ps2dev.serio->phys); 1453 1454 if (psmouse->cleanup) 1455 psmouse->cleanup(psmouse); 1456 1457 /* 1458 * Reset the mouse to defaults (bare PS/2 protocol). 1459 */ 1460 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1461 1462 /* 1463 * Some boxes, such as HP nx7400, get terribly confused if mouse 1464 * is not fully enabled before suspending/shutting down. 1465 */ 1466 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1467 1468 if (parent) { 1469 if (parent->pt_deactivate) 1470 parent->pt_deactivate(parent); 1471 1472 psmouse_activate(parent); 1473 } 1474 1475 mutex_unlock(&psmouse_mutex); 1476 } 1477 1478 /* 1479 * psmouse_disconnect() closes and frees. 1480 */ 1481 static void psmouse_disconnect(struct serio *serio) 1482 { 1483 struct psmouse *psmouse = serio_get_drvdata(serio); 1484 struct psmouse *parent = NULL; 1485 1486 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1487 1488 mutex_lock(&psmouse_mutex); 1489 1490 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1491 1492 /* make sure we don't have a resync in progress */ 1493 mutex_unlock(&psmouse_mutex); 1494 flush_workqueue(kpsmoused_wq); 1495 mutex_lock(&psmouse_mutex); 1496 1497 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1498 parent = serio_get_drvdata(serio->parent); 1499 psmouse_deactivate(parent); 1500 } 1501 1502 if (psmouse->disconnect) 1503 psmouse->disconnect(psmouse); 1504 1505 if (parent && parent->pt_deactivate) 1506 parent->pt_deactivate(parent); 1507 1508 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1509 1510 serio_close(serio); 1511 serio_set_drvdata(serio, NULL); 1512 1513 if (psmouse->dev) 1514 input_unregister_device(psmouse->dev); 1515 1516 kfree(psmouse); 1517 1518 if (parent) 1519 psmouse_activate(parent); 1520 1521 mutex_unlock(&psmouse_mutex); 1522 } 1523 1524 static int psmouse_switch_protocol(struct psmouse *psmouse, 1525 const struct psmouse_protocol *proto) 1526 { 1527 const struct psmouse_protocol *selected_proto; 1528 struct input_dev *input_dev = psmouse->dev; 1529 enum psmouse_type type; 1530 1531 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1532 1533 if (proto && (proto->detect || proto->init)) { 1534 psmouse_apply_defaults(psmouse); 1535 1536 if (proto->detect && proto->detect(psmouse, true) < 0) 1537 return -1; 1538 1539 if (proto->init && proto->init(psmouse) < 0) 1540 return -1; 1541 1542 selected_proto = proto; 1543 } else { 1544 type = psmouse_extensions(psmouse, psmouse_max_proto, true); 1545 selected_proto = psmouse_protocol_by_type(type); 1546 } 1547 1548 psmouse->protocol = selected_proto; 1549 1550 /* 1551 * If mouse's packet size is 3 there is no point in polling the 1552 * device in hopes to detect protocol reset - we won't get less 1553 * than 3 bytes response anyhow. 1554 */ 1555 if (psmouse->pktsize == 3) 1556 psmouse->resync_time = 0; 1557 1558 /* 1559 * Some smart KVMs fake response to POLL command returning just 1560 * 3 bytes and messing up our resync logic, so if initial poll 1561 * fails we won't try polling the device anymore. Hopefully 1562 * such KVM will maintain initially selected protocol. 1563 */ 1564 if (psmouse->resync_time && psmouse->poll(psmouse)) 1565 psmouse->resync_time = 0; 1566 1567 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1568 selected_proto->name, psmouse->vendor, psmouse->name); 1569 1570 input_dev->name = psmouse->devname; 1571 input_dev->phys = psmouse->phys; 1572 input_dev->id.bustype = BUS_I8042; 1573 input_dev->id.vendor = 0x0002; 1574 input_dev->id.product = psmouse->protocol->type; 1575 input_dev->id.version = psmouse->model; 1576 1577 return 0; 1578 } 1579 1580 /* 1581 * psmouse_connect() is a callback from the serio module when 1582 * an unhandled serio port is found. 1583 */ 1584 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1585 { 1586 struct psmouse *psmouse, *parent = NULL; 1587 struct input_dev *input_dev; 1588 int retval = 0, error = -ENOMEM; 1589 1590 mutex_lock(&psmouse_mutex); 1591 1592 /* 1593 * If this is a pass-through port deactivate parent so the device 1594 * connected to this port can be successfully identified 1595 */ 1596 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1597 parent = serio_get_drvdata(serio->parent); 1598 psmouse_deactivate(parent); 1599 } 1600 1601 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1602 input_dev = input_allocate_device(); 1603 if (!psmouse || !input_dev) 1604 goto err_free; 1605 1606 ps2_init(&psmouse->ps2dev, serio); 1607 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1608 psmouse->dev = input_dev; 1609 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1610 1611 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1612 1613 serio_set_drvdata(serio, psmouse); 1614 1615 error = serio_open(serio, drv); 1616 if (error) 1617 goto err_clear_drvdata; 1618 1619 /* give PT device some time to settle down before probing */ 1620 if (serio->id.type == SERIO_PS_PSTHRU) 1621 usleep_range(10000, 15000); 1622 1623 if (psmouse_probe(psmouse) < 0) { 1624 error = -ENODEV; 1625 goto err_close_serio; 1626 } 1627 1628 psmouse->rate = psmouse_rate; 1629 psmouse->resolution = psmouse_resolution; 1630 psmouse->resetafter = psmouse_resetafter; 1631 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1632 psmouse->smartscroll = psmouse_smartscroll; 1633 1634 psmouse_switch_protocol(psmouse, NULL); 1635 1636 if (!psmouse->protocol->smbus_companion) { 1637 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1638 psmouse_initialize(psmouse); 1639 1640 error = input_register_device(input_dev); 1641 if (error) 1642 goto err_protocol_disconnect; 1643 } else { 1644 /* Smbus companion will be reporting events, not us. */ 1645 input_free_device(input_dev); 1646 psmouse->dev = input_dev = NULL; 1647 } 1648 1649 if (parent && parent->pt_activate) 1650 parent->pt_activate(parent); 1651 1652 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1653 if (error) 1654 goto err_pt_deactivate; 1655 1656 /* 1657 * PS/2 devices having SMBus companions should stay disabled 1658 * on PS/2 side, in order to have SMBus part operable. 1659 */ 1660 if (!psmouse->protocol->smbus_companion) 1661 psmouse_activate(psmouse); 1662 1663 out: 1664 /* If this is a pass-through port the parent needs to be re-activated */ 1665 if (parent) 1666 psmouse_activate(parent); 1667 1668 mutex_unlock(&psmouse_mutex); 1669 return retval; 1670 1671 err_pt_deactivate: 1672 if (parent && parent->pt_deactivate) 1673 parent->pt_deactivate(parent); 1674 if (input_dev) { 1675 input_unregister_device(input_dev); 1676 input_dev = NULL; /* so we don't try to free it below */ 1677 } 1678 err_protocol_disconnect: 1679 if (psmouse->disconnect) 1680 psmouse->disconnect(psmouse); 1681 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1682 err_close_serio: 1683 serio_close(serio); 1684 err_clear_drvdata: 1685 serio_set_drvdata(serio, NULL); 1686 err_free: 1687 input_free_device(input_dev); 1688 kfree(psmouse); 1689 1690 retval = error; 1691 goto out; 1692 } 1693 1694 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect) 1695 { 1696 struct psmouse *psmouse = serio_get_drvdata(serio); 1697 struct psmouse *parent = NULL; 1698 int (*reconnect_handler)(struct psmouse *); 1699 enum psmouse_type type; 1700 int rc = -1; 1701 1702 mutex_lock(&psmouse_mutex); 1703 1704 if (fast_reconnect) { 1705 reconnect_handler = psmouse->fast_reconnect; 1706 if (!reconnect_handler) { 1707 rc = -ENOENT; 1708 goto out_unlock; 1709 } 1710 } else { 1711 reconnect_handler = psmouse->reconnect; 1712 } 1713 1714 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1715 parent = serio_get_drvdata(serio->parent); 1716 psmouse_deactivate(parent); 1717 } 1718 1719 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1720 1721 if (reconnect_handler) { 1722 if (reconnect_handler(psmouse)) 1723 goto out; 1724 } else { 1725 psmouse_reset(psmouse); 1726 1727 if (psmouse_probe(psmouse) < 0) 1728 goto out; 1729 1730 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1731 if (psmouse->protocol->type != type) 1732 goto out; 1733 } 1734 1735 /* 1736 * OK, the device type (and capabilities) match the old one, 1737 * we can continue using it, complete initialization 1738 */ 1739 if (!psmouse->protocol->smbus_companion) { 1740 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1741 psmouse_initialize(psmouse); 1742 } 1743 1744 if (parent && parent->pt_activate) 1745 parent->pt_activate(parent); 1746 1747 /* 1748 * PS/2 devices having SMBus companions should stay disabled 1749 * on PS/2 side, in order to have SMBus part operable. 1750 */ 1751 if (!psmouse->protocol->smbus_companion) 1752 psmouse_activate(psmouse); 1753 1754 rc = 0; 1755 1756 out: 1757 /* If this is a pass-through port the parent waits to be activated */ 1758 if (parent) 1759 psmouse_activate(parent); 1760 1761 out_unlock: 1762 mutex_unlock(&psmouse_mutex); 1763 return rc; 1764 } 1765 1766 static int psmouse_reconnect(struct serio *serio) 1767 { 1768 return __psmouse_reconnect(serio, false); 1769 } 1770 1771 static int psmouse_fast_reconnect(struct serio *serio) 1772 { 1773 return __psmouse_reconnect(serio, true); 1774 } 1775 1776 static struct serio_device_id psmouse_serio_ids[] = { 1777 { 1778 .type = SERIO_8042, 1779 .proto = SERIO_ANY, 1780 .id = SERIO_ANY, 1781 .extra = SERIO_ANY, 1782 }, 1783 { 1784 .type = SERIO_PS_PSTHRU, 1785 .proto = SERIO_ANY, 1786 .id = SERIO_ANY, 1787 .extra = SERIO_ANY, 1788 }, 1789 { 0 } 1790 }; 1791 1792 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1793 1794 static struct serio_driver psmouse_drv = { 1795 .driver = { 1796 .name = "psmouse", 1797 }, 1798 .description = DRIVER_DESC, 1799 .id_table = psmouse_serio_ids, 1800 .interrupt = psmouse_interrupt, 1801 .connect = psmouse_connect, 1802 .reconnect = psmouse_reconnect, 1803 .fast_reconnect = psmouse_fast_reconnect, 1804 .disconnect = psmouse_disconnect, 1805 .cleanup = psmouse_cleanup, 1806 }; 1807 1808 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1809 char *buf) 1810 { 1811 struct serio *serio = to_serio_port(dev); 1812 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1813 struct psmouse *psmouse = serio_get_drvdata(serio); 1814 1815 if (psmouse->protocol->smbus_companion && 1816 devattr != &psmouse_attr_protocol.dattr) 1817 return -ENOENT; 1818 1819 return attr->show(psmouse, attr->data, buf); 1820 } 1821 1822 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1823 const char *buf, size_t count) 1824 { 1825 struct serio *serio = to_serio_port(dev); 1826 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1827 struct psmouse *psmouse, *parent = NULL; 1828 int retval; 1829 1830 retval = mutex_lock_interruptible(&psmouse_mutex); 1831 if (retval) 1832 goto out; 1833 1834 psmouse = serio_get_drvdata(serio); 1835 1836 if (psmouse->protocol->smbus_companion && 1837 devattr != &psmouse_attr_protocol.dattr) { 1838 retval = -ENOENT; 1839 goto out_unlock; 1840 } 1841 1842 if (attr->protect) { 1843 if (psmouse->state == PSMOUSE_IGNORE) { 1844 retval = -ENODEV; 1845 goto out_unlock; 1846 } 1847 1848 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1849 parent = serio_get_drvdata(serio->parent); 1850 psmouse_deactivate(parent); 1851 } 1852 1853 if (!psmouse->protocol->smbus_companion) 1854 psmouse_deactivate(psmouse); 1855 } 1856 1857 retval = attr->set(psmouse, attr->data, buf, count); 1858 1859 if (attr->protect) { 1860 if (retval != -ENODEV && !psmouse->protocol->smbus_companion) 1861 psmouse_activate(psmouse); 1862 1863 if (parent) 1864 psmouse_activate(parent); 1865 } 1866 1867 out_unlock: 1868 mutex_unlock(&psmouse_mutex); 1869 out: 1870 return retval; 1871 } 1872 1873 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1874 { 1875 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1876 1877 return sprintf(buf, "%u\n", *field); 1878 } 1879 1880 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1881 { 1882 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1883 unsigned int value; 1884 int err; 1885 1886 err = kstrtouint(buf, 10, &value); 1887 if (err) 1888 return err; 1889 1890 *field = value; 1891 1892 return count; 1893 } 1894 1895 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1896 { 1897 return sprintf(buf, "%s\n", psmouse->protocol->name); 1898 } 1899 1900 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1901 { 1902 struct serio *serio = psmouse->ps2dev.serio; 1903 struct psmouse *parent = NULL; 1904 struct input_dev *old_dev, *new_dev; 1905 const struct psmouse_protocol *proto, *old_proto; 1906 int error; 1907 int retry = 0; 1908 1909 proto = psmouse_protocol_by_name(buf, count); 1910 if (!proto) 1911 return -EINVAL; 1912 1913 if (psmouse->protocol == proto) 1914 return count; 1915 1916 new_dev = input_allocate_device(); 1917 if (!new_dev) 1918 return -ENOMEM; 1919 1920 while (!list_empty(&serio->children)) { 1921 if (++retry > 3) { 1922 psmouse_warn(psmouse, 1923 "failed to destroy children ports, protocol change aborted.\n"); 1924 input_free_device(new_dev); 1925 return -EIO; 1926 } 1927 1928 mutex_unlock(&psmouse_mutex); 1929 serio_unregister_child_port(serio); 1930 mutex_lock(&psmouse_mutex); 1931 1932 if (serio->drv != &psmouse_drv) { 1933 input_free_device(new_dev); 1934 return -ENODEV; 1935 } 1936 1937 if (psmouse->protocol == proto) { 1938 input_free_device(new_dev); 1939 return count; /* switched by other thread */ 1940 } 1941 } 1942 1943 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1944 parent = serio_get_drvdata(serio->parent); 1945 if (parent->pt_deactivate) 1946 parent->pt_deactivate(parent); 1947 } 1948 1949 old_dev = psmouse->dev; 1950 old_proto = psmouse->protocol; 1951 1952 if (psmouse->disconnect) 1953 psmouse->disconnect(psmouse); 1954 1955 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1956 1957 psmouse->dev = new_dev; 1958 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1959 1960 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1961 psmouse_reset(psmouse); 1962 /* default to PSMOUSE_PS2 */ 1963 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1964 } 1965 1966 psmouse_initialize(psmouse); 1967 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1968 1969 if (psmouse->protocol->smbus_companion) { 1970 input_free_device(psmouse->dev); 1971 psmouse->dev = NULL; 1972 } else { 1973 error = input_register_device(psmouse->dev); 1974 if (error) { 1975 if (psmouse->disconnect) 1976 psmouse->disconnect(psmouse); 1977 1978 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1979 input_free_device(new_dev); 1980 psmouse->dev = old_dev; 1981 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1982 psmouse_switch_protocol(psmouse, old_proto); 1983 psmouse_initialize(psmouse); 1984 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1985 1986 return error; 1987 } 1988 } 1989 1990 if (old_dev) 1991 input_unregister_device(old_dev); 1992 1993 if (parent && parent->pt_activate) 1994 parent->pt_activate(parent); 1995 1996 return count; 1997 } 1998 1999 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 2000 { 2001 unsigned int value; 2002 int err; 2003 2004 err = kstrtouint(buf, 10, &value); 2005 if (err) 2006 return err; 2007 2008 psmouse->set_rate(psmouse, value); 2009 return count; 2010 } 2011 2012 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 2013 { 2014 unsigned int value; 2015 int err; 2016 2017 err = kstrtouint(buf, 10, &value); 2018 if (err) 2019 return err; 2020 2021 psmouse->set_resolution(psmouse, value); 2022 return count; 2023 } 2024 2025 2026 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 2027 { 2028 const struct psmouse_protocol *proto; 2029 2030 if (!val) 2031 return -EINVAL; 2032 2033 proto = psmouse_protocol_by_name(val, strlen(val)); 2034 2035 if (!proto || !proto->maxproto) 2036 return -EINVAL; 2037 2038 *((unsigned int *)kp->arg) = proto->type; 2039 2040 return 0; 2041 } 2042 2043 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 2044 { 2045 int type = *((unsigned int *)kp->arg); 2046 2047 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 2048 } 2049 2050 static int __init psmouse_init(void) 2051 { 2052 int err; 2053 2054 lifebook_module_init(); 2055 synaptics_module_init(); 2056 hgpk_module_init(); 2057 2058 err = psmouse_smbus_module_init(); 2059 if (err) 2060 return err; 2061 2062 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); 2063 if (!kpsmoused_wq) { 2064 pr_err("failed to create kpsmoused workqueue\n"); 2065 err = -ENOMEM; 2066 goto err_smbus_exit; 2067 } 2068 2069 err = serio_register_driver(&psmouse_drv); 2070 if (err) 2071 goto err_destroy_wq; 2072 2073 return 0; 2074 2075 err_destroy_wq: 2076 destroy_workqueue(kpsmoused_wq); 2077 err_smbus_exit: 2078 psmouse_smbus_module_exit(); 2079 return err; 2080 } 2081 2082 static void __exit psmouse_exit(void) 2083 { 2084 serio_unregister_driver(&psmouse_drv); 2085 destroy_workqueue(kpsmoused_wq); 2086 psmouse_smbus_module_exit(); 2087 } 2088 2089 module_init(psmouse_init); 2090 module_exit(psmouse_exit); 2091