1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * PS/2 mouse driver 4 * 5 * Copyright (c) 1999-2002 Vojtech Pavlik 6 * Copyright (c) 2003-2004 Dmitry Torokhov 7 */ 8 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 #define psmouse_fmt(fmt) fmt 12 13 #include <linux/bitops.h> 14 #include <linux/delay.h> 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/interrupt.h> 18 #include <linux/input.h> 19 #include <linux/serio.h> 20 #include <linux/init.h> 21 #include <linux/libps2.h> 22 #include <linux/mutex.h> 23 #include <linux/types.h> 24 25 #include "psmouse.h" 26 #include "synaptics.h" 27 #include "logips2pp.h" 28 #include "alps.h" 29 #include "hgpk.h" 30 #include "lifebook.h" 31 #include "trackpoint.h" 32 #include "touchkit_ps2.h" 33 #include "elantech.h" 34 #include "sentelic.h" 35 #include "cypress_ps2.h" 36 #include "focaltech.h" 37 #include "vmmouse.h" 38 #include "byd.h" 39 40 #define DRIVER_DESC "PS/2 mouse driver" 41 42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 43 MODULE_DESCRIPTION(DRIVER_DESC); 44 MODULE_LICENSE("GPL"); 45 46 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 47 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 48 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 49 static const struct kernel_param_ops param_ops_proto_abbrev = { 50 .set = psmouse_set_maxproto, 51 .get = psmouse_get_maxproto, 52 }; 53 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 54 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 55 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 56 57 static unsigned int psmouse_resolution = 200; 58 module_param_named(resolution, psmouse_resolution, uint, 0644); 59 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 60 61 static unsigned int psmouse_rate = 100; 62 module_param_named(rate, psmouse_rate, uint, 0644); 63 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 64 65 static bool psmouse_smartscroll = true; 66 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 67 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 68 69 static bool psmouse_a4tech_2wheels; 70 module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644); 71 MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default)."); 72 73 static unsigned int psmouse_resetafter = 5; 74 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 75 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 76 77 static unsigned int psmouse_resync_time; 78 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 79 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 80 81 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 82 NULL, 83 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 84 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 85 (void *) offsetof(struct psmouse, rate), 86 psmouse_show_int_attr, psmouse_attr_set_rate); 87 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 88 (void *) offsetof(struct psmouse, resolution), 89 psmouse_show_int_attr, psmouse_attr_set_resolution); 90 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 91 (void *) offsetof(struct psmouse, resetafter), 92 psmouse_show_int_attr, psmouse_set_int_attr); 93 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 94 (void *) offsetof(struct psmouse, resync_time), 95 psmouse_show_int_attr, psmouse_set_int_attr); 96 97 static struct attribute *psmouse_dev_attrs[] = { 98 &psmouse_attr_protocol.dattr.attr, 99 &psmouse_attr_rate.dattr.attr, 100 &psmouse_attr_resolution.dattr.attr, 101 &psmouse_attr_resetafter.dattr.attr, 102 &psmouse_attr_resync_time.dattr.attr, 103 NULL 104 }; 105 106 ATTRIBUTE_GROUPS(psmouse_dev); 107 108 /* 109 * psmouse_mutex protects all operations changing state of mouse 110 * (connecting, disconnecting, changing rate or resolution via 111 * sysfs). We could use a per-device semaphore but since there 112 * rarely more than one PS/2 mouse connected and since semaphore 113 * is taken in "slow" paths it is not worth it. 114 */ 115 static DEFINE_MUTEX(psmouse_mutex); 116 117 static struct workqueue_struct *kpsmoused_wq; 118 119 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons) 120 { 121 input_report_key(dev, BTN_LEFT, buttons & BIT(0)); 122 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2)); 123 input_report_key(dev, BTN_RIGHT, buttons & BIT(1)); 124 } 125 126 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet) 127 { 128 int x, y; 129 130 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0; 131 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0; 132 133 input_report_rel(dev, REL_X, x); 134 input_report_rel(dev, REL_Y, -y); 135 } 136 137 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet) 138 { 139 psmouse_report_standard_buttons(dev, packet[0]); 140 psmouse_report_standard_motion(dev, packet); 141 } 142 143 /* 144 * psmouse_process_byte() analyzes the PS/2 data stream and reports 145 * relevant events to the input module once full packet has arrived. 146 */ 147 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 148 { 149 struct input_dev *dev = psmouse->dev; 150 u8 *packet = psmouse->packet; 151 int wheel; 152 153 if (psmouse->pktcnt < psmouse->pktsize) 154 return PSMOUSE_GOOD_DATA; 155 156 /* Full packet accumulated, process it */ 157 158 switch (psmouse->protocol->type) { 159 case PSMOUSE_IMPS: 160 /* IntelliMouse has scroll wheel */ 161 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 162 break; 163 164 case PSMOUSE_IMEX: 165 /* Scroll wheel and buttons on IntelliMouse Explorer */ 166 switch (packet[3] & 0xC0) { 167 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 168 input_report_rel(dev, REL_WHEEL, 169 -sign_extend32(packet[3], 5)); 170 break; 171 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 172 input_report_rel(dev, REL_HWHEEL, 173 -sign_extend32(packet[3], 5)); 174 break; 175 case 0x00: 176 case 0xC0: 177 wheel = sign_extend32(packet[3], 3); 178 179 /* 180 * Some A4Tech mice have two scroll wheels, with first 181 * one reporting +/-1 in the lower nibble, and second 182 * one reporting +/-2. 183 */ 184 if (psmouse_a4tech_2wheels && abs(wheel) > 1) 185 input_report_rel(dev, REL_HWHEEL, wheel / 2); 186 else 187 input_report_rel(dev, REL_WHEEL, -wheel); 188 189 input_report_key(dev, BTN_SIDE, packet[3] & BIT(4)); 190 input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5)); 191 break; 192 } 193 break; 194 195 case PSMOUSE_GENPS: 196 /* Report scroll buttons on NetMice */ 197 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 198 199 /* Extra buttons on Genius NewNet 3D */ 200 input_report_key(dev, BTN_SIDE, packet[0] & BIT(6)); 201 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7)); 202 break; 203 204 case PSMOUSE_THINKPS: 205 /* Extra button on ThinkingMouse */ 206 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3)); 207 208 /* 209 * Without this bit of weirdness moving up gives wildly 210 * high Y changes. 211 */ 212 packet[1] |= (packet[0] & 0x40) << 1; 213 break; 214 215 case PSMOUSE_CORTRON: 216 /* 217 * Cortron PS2 Trackball reports SIDE button in the 218 * 4th bit of the first byte. 219 */ 220 input_report_key(dev, BTN_SIDE, packet[0] & BIT(3)); 221 packet[0] |= BIT(3); 222 break; 223 224 default: 225 break; 226 } 227 228 /* Generic PS/2 Mouse */ 229 packet[0] |= psmouse->extra_buttons; 230 psmouse_report_standard_packet(dev, packet); 231 232 input_sync(dev); 233 234 return PSMOUSE_FULL_PACKET; 235 } 236 237 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 238 unsigned long delay) 239 { 240 queue_delayed_work(kpsmoused_wq, work, delay); 241 } 242 243 /* 244 * __psmouse_set_state() sets new psmouse state and resets all flags. 245 */ 246 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 247 { 248 psmouse->state = new_state; 249 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 250 psmouse->ps2dev.flags = 0; 251 psmouse->last = jiffies; 252 } 253 254 /* 255 * psmouse_set_state() sets new psmouse state and resets all flags and 256 * counters while holding serio lock so fighting with interrupt handler 257 * is not a concern. 258 */ 259 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 260 { 261 serio_pause_rx(psmouse->ps2dev.serio); 262 __psmouse_set_state(psmouse, new_state); 263 serio_continue_rx(psmouse->ps2dev.serio); 264 } 265 266 /* 267 * psmouse_handle_byte() processes one byte of the input data stream 268 * by calling corresponding protocol handler. 269 */ 270 static int psmouse_handle_byte(struct psmouse *psmouse) 271 { 272 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 273 274 switch (rc) { 275 case PSMOUSE_BAD_DATA: 276 if (psmouse->state == PSMOUSE_ACTIVATED) { 277 psmouse_warn(psmouse, 278 "%s at %s lost sync at byte %d\n", 279 psmouse->name, psmouse->phys, 280 psmouse->pktcnt); 281 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 282 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 283 psmouse_notice(psmouse, 284 "issuing reconnect request\n"); 285 serio_reconnect(psmouse->ps2dev.serio); 286 return -EIO; 287 } 288 } 289 psmouse->pktcnt = 0; 290 break; 291 292 case PSMOUSE_FULL_PACKET: 293 psmouse->pktcnt = 0; 294 if (psmouse->out_of_sync_cnt) { 295 psmouse->out_of_sync_cnt = 0; 296 psmouse_notice(psmouse, 297 "%s at %s - driver resynced.\n", 298 psmouse->name, psmouse->phys); 299 } 300 break; 301 302 case PSMOUSE_GOOD_DATA: 303 break; 304 } 305 return 0; 306 } 307 308 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data) 309 { 310 switch (psmouse->oob_data_type) { 311 case PSMOUSE_OOB_NONE: 312 psmouse->oob_data_type = data; 313 break; 314 315 case PSMOUSE_OOB_EXTRA_BTNS: 316 psmouse_report_standard_buttons(psmouse->dev, data); 317 input_sync(psmouse->dev); 318 319 psmouse->extra_buttons = data; 320 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 321 break; 322 323 default: 324 psmouse_warn(psmouse, 325 "unknown OOB_DATA type: 0x%02x\n", 326 psmouse->oob_data_type); 327 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 328 break; 329 } 330 } 331 332 /* 333 * psmouse_interrupt() handles incoming characters, either passing them 334 * for normal processing or gathering them as command response. 335 */ 336 static irqreturn_t psmouse_interrupt(struct serio *serio, 337 u8 data, unsigned int flags) 338 { 339 struct psmouse *psmouse = serio_get_drvdata(serio); 340 341 if (psmouse->state == PSMOUSE_IGNORE) 342 goto out; 343 344 if (unlikely((flags & SERIO_TIMEOUT) || 345 ((flags & SERIO_PARITY) && 346 !psmouse->protocol->ignore_parity))) { 347 348 if (psmouse->state == PSMOUSE_ACTIVATED) 349 psmouse_warn(psmouse, 350 "bad data from KBC -%s%s\n", 351 flags & SERIO_TIMEOUT ? " timeout" : "", 352 flags & SERIO_PARITY ? " bad parity" : ""); 353 ps2_cmd_aborted(&psmouse->ps2dev); 354 goto out; 355 } 356 357 if (flags & SERIO_OOB_DATA) { 358 psmouse_handle_oob_data(psmouse, data); 359 goto out; 360 } 361 362 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 363 if (ps2_handle_ack(&psmouse->ps2dev, data)) 364 goto out; 365 366 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 367 if (ps2_handle_response(&psmouse->ps2dev, data)) 368 goto out; 369 370 pm_wakeup_event(&serio->dev, 0); 371 372 if (psmouse->state <= PSMOUSE_RESYNCING) 373 goto out; 374 375 if (psmouse->state == PSMOUSE_ACTIVATED && 376 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 377 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 378 psmouse->name, psmouse->phys, psmouse->pktcnt); 379 psmouse->badbyte = psmouse->packet[0]; 380 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 381 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 382 goto out; 383 } 384 385 psmouse->packet[psmouse->pktcnt++] = data; 386 387 /* Check if this is a new device announcement (0xAA 0x00) */ 388 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 389 if (psmouse->pktcnt == 1) { 390 psmouse->last = jiffies; 391 goto out; 392 } 393 394 if (psmouse->packet[1] == PSMOUSE_RET_ID || 395 (psmouse->protocol->type == PSMOUSE_HGPK && 396 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 397 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 398 serio_reconnect(serio); 399 goto out; 400 } 401 402 /* Not a new device, try processing first byte normally */ 403 psmouse->pktcnt = 1; 404 if (psmouse_handle_byte(psmouse)) 405 goto out; 406 407 psmouse->packet[psmouse->pktcnt++] = data; 408 } 409 410 /* 411 * See if we need to force resync because mouse was idle for 412 * too long. 413 */ 414 if (psmouse->state == PSMOUSE_ACTIVATED && 415 psmouse->pktcnt == 1 && psmouse->resync_time && 416 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 417 psmouse->badbyte = psmouse->packet[0]; 418 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 419 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 420 goto out; 421 } 422 423 psmouse->last = jiffies; 424 psmouse_handle_byte(psmouse); 425 426 out: 427 return IRQ_HANDLED; 428 } 429 430 /* 431 * psmouse_reset() resets the mouse into power-on state. 432 */ 433 int psmouse_reset(struct psmouse *psmouse) 434 { 435 u8 param[2]; 436 int error; 437 438 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT); 439 if (error) 440 return error; 441 442 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 443 return -EIO; 444 445 return 0; 446 } 447 448 /* 449 * Here we set the mouse resolution. 450 */ 451 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 452 { 453 static const u8 params[] = { 0, 1, 2, 2, 3 }; 454 u8 p; 455 456 if (resolution == 0 || resolution > 200) 457 resolution = 200; 458 459 p = params[resolution / 50]; 460 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 461 psmouse->resolution = 25 << p; 462 } 463 464 /* 465 * Here we set the mouse report rate. 466 */ 467 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 468 { 469 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 470 u8 r; 471 int i = 0; 472 473 while (rates[i] > rate) 474 i++; 475 r = rates[i]; 476 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 477 psmouse->rate = r; 478 } 479 480 /* 481 * Here we set the mouse scaling. 482 */ 483 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale) 484 { 485 ps2_command(&psmouse->ps2dev, NULL, 486 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 : 487 PSMOUSE_CMD_SETSCALE11); 488 } 489 490 /* 491 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it. 492 */ 493 static int psmouse_poll(struct psmouse *psmouse) 494 { 495 return ps2_command(&psmouse->ps2dev, psmouse->packet, 496 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 497 } 498 499 static bool psmouse_check_pnp_id(const char *id, const char * const ids[]) 500 { 501 int i; 502 503 for (i = 0; ids[i]; i++) 504 if (!strcasecmp(id, ids[i])) 505 return true; 506 507 return false; 508 } 509 510 /* 511 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids. 512 */ 513 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[]) 514 { 515 struct serio *serio = psmouse->ps2dev.serio; 516 char *p, *fw_id_copy, *save_ptr; 517 bool found = false; 518 519 if (strncmp(serio->firmware_id, "PNP: ", 5)) 520 return false; 521 522 fw_id_copy = kstrndup(&serio->firmware_id[5], 523 sizeof(serio->firmware_id) - 5, 524 GFP_KERNEL); 525 if (!fw_id_copy) 526 return false; 527 528 save_ptr = fw_id_copy; 529 while ((p = strsep(&fw_id_copy, " ")) != NULL) { 530 if (psmouse_check_pnp_id(p, ids)) { 531 found = true; 532 break; 533 } 534 } 535 536 kfree(save_ptr); 537 return found; 538 } 539 540 /* 541 * Genius NetMouse magic init. 542 */ 543 static int genius_detect(struct psmouse *psmouse, bool set_properties) 544 { 545 struct ps2dev *ps2dev = &psmouse->ps2dev; 546 u8 param[4]; 547 548 param[0] = 3; 549 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 550 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 551 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 552 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 553 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 554 555 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 556 return -ENODEV; 557 558 if (set_properties) { 559 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 560 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 561 __set_bit(BTN_SIDE, psmouse->dev->keybit); 562 __set_bit(REL_WHEEL, psmouse->dev->relbit); 563 564 psmouse->vendor = "Genius"; 565 psmouse->name = "Mouse"; 566 psmouse->pktsize = 4; 567 } 568 569 return 0; 570 } 571 572 /* 573 * IntelliMouse magic init. 574 */ 575 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 576 { 577 struct ps2dev *ps2dev = &psmouse->ps2dev; 578 u8 param[2]; 579 580 param[0] = 200; 581 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 582 param[0] = 100; 583 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 584 param[0] = 80; 585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 586 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 587 588 if (param[0] != 3) 589 return -ENODEV; 590 591 if (set_properties) { 592 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 593 __set_bit(REL_WHEEL, psmouse->dev->relbit); 594 595 if (!psmouse->vendor) 596 psmouse->vendor = "Generic"; 597 if (!psmouse->name) 598 psmouse->name = "Wheel Mouse"; 599 psmouse->pktsize = 4; 600 } 601 602 return 0; 603 } 604 605 /* 606 * Try IntelliMouse/Explorer magic init. 607 */ 608 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 609 { 610 struct ps2dev *ps2dev = &psmouse->ps2dev; 611 u8 param[2]; 612 613 intellimouse_detect(psmouse, 0); 614 615 param[0] = 200; 616 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 617 param[0] = 200; 618 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 619 param[0] = 80; 620 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 621 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 622 623 if (param[0] != 4) 624 return -ENODEV; 625 626 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 627 param[0] = 200; 628 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 629 param[0] = 80; 630 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 631 param[0] = 40; 632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 633 634 if (set_properties) { 635 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 636 __set_bit(REL_WHEEL, psmouse->dev->relbit); 637 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 638 __set_bit(BTN_SIDE, psmouse->dev->keybit); 639 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 640 641 if (!psmouse->vendor) 642 psmouse->vendor = "Generic"; 643 if (!psmouse->name) 644 psmouse->name = "Explorer Mouse"; 645 psmouse->pktsize = 4; 646 } 647 648 return 0; 649 } 650 651 /* 652 * Kensington ThinkingMouse / ExpertMouse magic init. 653 */ 654 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 655 { 656 struct ps2dev *ps2dev = &psmouse->ps2dev; 657 u8 param[2]; 658 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 659 int i; 660 661 param[0] = 10; 662 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 663 param[0] = 0; 664 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 665 for (i = 0; i < ARRAY_SIZE(seq); i++) { 666 param[0] = seq[i]; 667 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 668 } 669 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 670 671 if (param[0] != 2) 672 return -ENODEV; 673 674 if (set_properties) { 675 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 676 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 677 678 psmouse->vendor = "Kensington"; 679 psmouse->name = "ThinkingMouse"; 680 } 681 682 return 0; 683 } 684 685 /* 686 * Bare PS/2 protocol "detection". Always succeeds. 687 */ 688 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 689 { 690 if (set_properties) { 691 if (!psmouse->vendor) 692 psmouse->vendor = "Generic"; 693 if (!psmouse->name) 694 psmouse->name = "Mouse"; 695 696 /* 697 * We have no way of figuring true number of buttons so let's 698 * assume that the device has 3. 699 */ 700 input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE); 701 } 702 703 return 0; 704 } 705 706 /* 707 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 708 * must be forced by sysfs protocol writing. 709 */ 710 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 711 { 712 if (set_properties) { 713 psmouse->vendor = "Cortron"; 714 psmouse->name = "PS/2 Trackball"; 715 716 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 717 __set_bit(BTN_SIDE, psmouse->dev->keybit); 718 } 719 720 return 0; 721 } 722 723 static const struct psmouse_protocol psmouse_protocols[] = { 724 { 725 .type = PSMOUSE_PS2, 726 .name = "PS/2", 727 .alias = "bare", 728 .maxproto = true, 729 .ignore_parity = true, 730 .detect = ps2bare_detect, 731 .try_passthru = true, 732 }, 733 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 734 { 735 .type = PSMOUSE_PS2PP, 736 .name = "PS2++", 737 .alias = "logitech", 738 .detect = ps2pp_detect, 739 }, 740 #endif 741 { 742 .type = PSMOUSE_THINKPS, 743 .name = "ThinkPS/2", 744 .alias = "thinkps", 745 .detect = thinking_detect, 746 }, 747 #ifdef CONFIG_MOUSE_PS2_CYPRESS 748 { 749 .type = PSMOUSE_CYPRESS, 750 .name = "CyPS/2", 751 .alias = "cypress", 752 .detect = cypress_detect, 753 .init = cypress_init, 754 }, 755 #endif 756 { 757 .type = PSMOUSE_GENPS, 758 .name = "GenPS/2", 759 .alias = "genius", 760 .detect = genius_detect, 761 }, 762 { 763 .type = PSMOUSE_IMPS, 764 .name = "ImPS/2", 765 .alias = "imps", 766 .maxproto = true, 767 .ignore_parity = true, 768 .detect = intellimouse_detect, 769 .try_passthru = true, 770 }, 771 { 772 .type = PSMOUSE_IMEX, 773 .name = "ImExPS/2", 774 .alias = "exps", 775 .maxproto = true, 776 .ignore_parity = true, 777 .detect = im_explorer_detect, 778 .try_passthru = true, 779 }, 780 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 781 { 782 .type = PSMOUSE_SYNAPTICS, 783 .name = "SynPS/2", 784 .alias = "synaptics", 785 .detect = synaptics_detect, 786 .init = synaptics_init_absolute, 787 }, 788 { 789 .type = PSMOUSE_SYNAPTICS_RELATIVE, 790 .name = "SynRelPS/2", 791 .alias = "synaptics-relative", 792 .detect = synaptics_detect, 793 .init = synaptics_init_relative, 794 }, 795 #endif 796 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 797 { 798 .type = PSMOUSE_SYNAPTICS_SMBUS, 799 .name = "SynSMBus", 800 .alias = "synaptics-smbus", 801 .detect = synaptics_detect, 802 .init = synaptics_init_smbus, 803 .smbus_companion = true, 804 }, 805 #endif 806 #ifdef CONFIG_MOUSE_PS2_ALPS 807 { 808 .type = PSMOUSE_ALPS, 809 .name = "AlpsPS/2", 810 .alias = "alps", 811 .detect = alps_detect, 812 .init = alps_init, 813 }, 814 #endif 815 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 816 { 817 .type = PSMOUSE_LIFEBOOK, 818 .name = "LBPS/2", 819 .alias = "lifebook", 820 .detect = lifebook_detect, 821 .init = lifebook_init, 822 }, 823 #endif 824 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 825 { 826 .type = PSMOUSE_TRACKPOINT, 827 .name = "TPPS/2", 828 .alias = "trackpoint", 829 .detect = trackpoint_detect, 830 .try_passthru = true, 831 }, 832 #endif 833 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 834 { 835 .type = PSMOUSE_TOUCHKIT_PS2, 836 .name = "touchkitPS/2", 837 .alias = "touchkit", 838 .detect = touchkit_ps2_detect, 839 }, 840 #endif 841 #ifdef CONFIG_MOUSE_PS2_OLPC 842 { 843 .type = PSMOUSE_HGPK, 844 .name = "OLPC HGPK", 845 .alias = "hgpk", 846 .detect = hgpk_detect, 847 }, 848 #endif 849 #ifdef CONFIG_MOUSE_PS2_ELANTECH 850 { 851 .type = PSMOUSE_ELANTECH, 852 .name = "ETPS/2", 853 .alias = "elantech", 854 .detect = elantech_detect, 855 .init = elantech_init_ps2, 856 }, 857 #endif 858 #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS 859 { 860 .type = PSMOUSE_ELANTECH_SMBUS, 861 .name = "ETSMBus", 862 .alias = "elantech-smbus", 863 .detect = elantech_detect, 864 .init = elantech_init_smbus, 865 .smbus_companion = true, 866 }, 867 #endif 868 #ifdef CONFIG_MOUSE_PS2_SENTELIC 869 { 870 .type = PSMOUSE_FSP, 871 .name = "FSPPS/2", 872 .alias = "fsp", 873 .detect = fsp_detect, 874 .init = fsp_init, 875 }, 876 #endif 877 { 878 .type = PSMOUSE_CORTRON, 879 .name = "CortronPS/2", 880 .alias = "cortps", 881 .detect = cortron_detect, 882 }, 883 #ifdef CONFIG_MOUSE_PS2_FOCALTECH 884 { 885 .type = PSMOUSE_FOCALTECH, 886 .name = "FocalTechPS/2", 887 .alias = "focaltech", 888 .detect = focaltech_detect, 889 .init = focaltech_init, 890 }, 891 #endif 892 #ifdef CONFIG_MOUSE_PS2_VMMOUSE 893 { 894 .type = PSMOUSE_VMMOUSE, 895 .name = VMMOUSE_PSNAME, 896 .alias = "vmmouse", 897 .detect = vmmouse_detect, 898 .init = vmmouse_init, 899 }, 900 #endif 901 #ifdef CONFIG_MOUSE_PS2_BYD 902 { 903 .type = PSMOUSE_BYD, 904 .name = "BYDPS/2", 905 .alias = "byd", 906 .detect = byd_detect, 907 .init = byd_init, 908 }, 909 #endif 910 { 911 .type = PSMOUSE_AUTO, 912 .name = "auto", 913 .alias = "any", 914 .maxproto = true, 915 }, 916 }; 917 918 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type) 919 { 920 int i; 921 922 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 923 if (psmouse_protocols[i].type == type) 924 return &psmouse_protocols[i]; 925 926 return NULL; 927 } 928 929 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 930 { 931 const struct psmouse_protocol *proto; 932 933 proto = __psmouse_protocol_by_type(type); 934 if (proto) 935 return proto; 936 937 WARN_ON(1); 938 return &psmouse_protocols[0]; 939 } 940 941 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 942 { 943 const struct psmouse_protocol *p; 944 int i; 945 946 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 947 p = &psmouse_protocols[i]; 948 949 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 950 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 951 return &psmouse_protocols[i]; 952 } 953 954 return NULL; 955 } 956 957 /* 958 * Apply default settings to the psmouse structure. Most of them will 959 * be overridden by individual protocol initialization routines. 960 */ 961 static void psmouse_apply_defaults(struct psmouse *psmouse) 962 { 963 struct input_dev *input_dev = psmouse->dev; 964 965 bitmap_zero(input_dev->evbit, EV_CNT); 966 bitmap_zero(input_dev->keybit, KEY_CNT); 967 bitmap_zero(input_dev->relbit, REL_CNT); 968 bitmap_zero(input_dev->absbit, ABS_CNT); 969 bitmap_zero(input_dev->mscbit, MSC_CNT); 970 971 input_set_capability(input_dev, EV_KEY, BTN_LEFT); 972 input_set_capability(input_dev, EV_KEY, BTN_RIGHT); 973 974 input_set_capability(input_dev, EV_REL, REL_X); 975 input_set_capability(input_dev, EV_REL, REL_Y); 976 977 __set_bit(INPUT_PROP_POINTER, input_dev->propbit); 978 979 psmouse->protocol = &psmouse_protocols[0]; 980 981 psmouse->set_rate = psmouse_set_rate; 982 psmouse->set_resolution = psmouse_set_resolution; 983 psmouse->set_scale = psmouse_set_scale; 984 psmouse->poll = psmouse_poll; 985 psmouse->protocol_handler = psmouse_process_byte; 986 psmouse->pktsize = 3; 987 psmouse->reconnect = NULL; 988 psmouse->fast_reconnect = NULL; 989 psmouse->disconnect = NULL; 990 psmouse->cleanup = NULL; 991 psmouse->pt_activate = NULL; 992 psmouse->pt_deactivate = NULL; 993 } 994 995 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool), 996 struct psmouse *psmouse, bool allow_passthrough, 997 bool set_properties) 998 { 999 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 1000 !allow_passthrough) { 1001 return false; 1002 } 1003 1004 if (set_properties) 1005 psmouse_apply_defaults(psmouse); 1006 1007 return detect(psmouse, set_properties) == 0; 1008 } 1009 1010 static bool psmouse_try_protocol(struct psmouse *psmouse, 1011 enum psmouse_type type, 1012 unsigned int *max_proto, 1013 bool set_properties, bool init_allowed) 1014 { 1015 const struct psmouse_protocol *proto; 1016 1017 proto = __psmouse_protocol_by_type(type); 1018 if (!proto) 1019 return false; 1020 1021 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru, 1022 set_properties)) 1023 return false; 1024 1025 if (set_properties && proto->init && init_allowed) { 1026 if (proto->init(psmouse) != 0) { 1027 /* 1028 * We detected device, but init failed. Adjust 1029 * max_proto so we only try standard protocols. 1030 */ 1031 if (*max_proto > PSMOUSE_IMEX) 1032 *max_proto = PSMOUSE_IMEX; 1033 1034 return false; 1035 } 1036 } 1037 1038 return true; 1039 } 1040 1041 /* 1042 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 1043 * the mouse may have. 1044 */ 1045 static int psmouse_extensions(struct psmouse *psmouse, 1046 unsigned int max_proto, bool set_properties) 1047 { 1048 bool synaptics_hardware = false; 1049 int ret; 1050 1051 /* 1052 * Always check for focaltech, this is safe as it uses pnp-id 1053 * matching. 1054 */ 1055 if (psmouse_do_detect(focaltech_detect, 1056 psmouse, false, set_properties)) { 1057 if (max_proto > PSMOUSE_IMEX && 1058 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 1059 (!set_properties || focaltech_init(psmouse) == 0)) { 1060 return PSMOUSE_FOCALTECH; 1061 } 1062 /* 1063 * Restrict psmouse_max_proto so that psmouse_initialize() 1064 * does not try to reset rate and resolution, because even 1065 * that upsets the device. 1066 * This also causes us to basically fall through to basic 1067 * protocol detection, where we fully reset the mouse, 1068 * and set it up as bare PS/2 protocol device. 1069 */ 1070 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1071 } 1072 1073 /* 1074 * We always check for LifeBook because it does not disturb mouse 1075 * (it only checks DMI information). 1076 */ 1077 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1078 set_properties, max_proto > PSMOUSE_IMEX)) 1079 return PSMOUSE_LIFEBOOK; 1080 1081 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1082 set_properties, max_proto > PSMOUSE_IMEX)) 1083 return PSMOUSE_VMMOUSE; 1084 1085 /* 1086 * Try Kensington ThinkingMouse (we try first, because Synaptics 1087 * probe upsets the ThinkingMouse). 1088 */ 1089 if (max_proto > PSMOUSE_IMEX && 1090 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1091 set_properties, true)) { 1092 return PSMOUSE_THINKPS; 1093 } 1094 1095 /* 1096 * Try Synaptics TouchPad. Note that probing is done even if 1097 * Synaptics protocol support is disabled in config - we need to 1098 * know if it is Synaptics so we can reset it properly after 1099 * probing for IntelliMouse. 1100 */ 1101 if (max_proto > PSMOUSE_PS2 && 1102 psmouse_do_detect(synaptics_detect, 1103 psmouse, false, set_properties)) { 1104 synaptics_hardware = true; 1105 1106 if (max_proto > PSMOUSE_IMEX) { 1107 /* 1108 * Try activating protocol, but check if support is 1109 * enabled first, since we try detecting Synaptics 1110 * even when protocol is disabled. 1111 */ 1112 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || 1113 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { 1114 if (!set_properties) 1115 return PSMOUSE_SYNAPTICS; 1116 1117 ret = synaptics_init(psmouse); 1118 if (ret >= 0) 1119 return ret; 1120 } 1121 1122 /* 1123 * Some Synaptics touchpads can emulate extended 1124 * protocols (like IMPS/2). Unfortunately 1125 * Logitech/Genius probes confuse some firmware 1126 * versions so we'll have to skip them. 1127 */ 1128 max_proto = PSMOUSE_IMEX; 1129 } 1130 1131 /* 1132 * Make sure that touchpad is in relative mode, gestures 1133 * (taps) are enabled. 1134 */ 1135 synaptics_reset(psmouse); 1136 } 1137 1138 /* 1139 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1140 * because Finger Sensing Pad probe upsets some modules of Cypress 1141 * Trackpads. 1142 */ 1143 if (max_proto > PSMOUSE_IMEX && 1144 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1145 set_properties, true)) { 1146 return PSMOUSE_CYPRESS; 1147 } 1148 1149 /* Try ALPS TouchPad */ 1150 if (max_proto > PSMOUSE_IMEX) { 1151 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1152 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1153 &max_proto, set_properties, true)) 1154 return PSMOUSE_ALPS; 1155 } 1156 1157 /* Try OLPC HGPK touchpad */ 1158 if (max_proto > PSMOUSE_IMEX && 1159 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1160 set_properties, true)) { 1161 return PSMOUSE_HGPK; 1162 } 1163 1164 /* Try Elantech touchpad */ 1165 if (max_proto > PSMOUSE_IMEX && 1166 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1167 &max_proto, set_properties, false)) { 1168 if (!set_properties) 1169 return PSMOUSE_ELANTECH; 1170 1171 ret = elantech_init(psmouse); 1172 if (ret >= 0) 1173 return ret; 1174 } 1175 1176 if (max_proto > PSMOUSE_IMEX) { 1177 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1178 &max_proto, set_properties, true)) 1179 return PSMOUSE_GENPS; 1180 1181 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1182 &max_proto, set_properties, true)) 1183 return PSMOUSE_PS2PP; 1184 1185 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1186 &max_proto, set_properties, true)) 1187 return PSMOUSE_TRACKPOINT; 1188 1189 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1190 &max_proto, set_properties, true)) 1191 return PSMOUSE_TOUCHKIT_PS2; 1192 } 1193 1194 /* 1195 * Try Finger Sensing Pad. We do it here because its probe upsets 1196 * Trackpoint devices (causing TP_READ_ID command to time out). 1197 */ 1198 if (max_proto > PSMOUSE_IMEX && 1199 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1200 &max_proto, set_properties, true)) { 1201 return PSMOUSE_FSP; 1202 } 1203 1204 /* 1205 * Reset to defaults in case the device got confused by extended 1206 * protocol probes. Note that we follow up with full reset because 1207 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1208 */ 1209 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1210 psmouse_reset(psmouse); 1211 1212 if (max_proto >= PSMOUSE_IMEX && 1213 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1214 &max_proto, set_properties, true)) { 1215 return PSMOUSE_IMEX; 1216 } 1217 1218 if (max_proto >= PSMOUSE_IMPS && 1219 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1220 &max_proto, set_properties, true)) { 1221 return PSMOUSE_IMPS; 1222 } 1223 1224 /* 1225 * Okay, all failed, we have a standard mouse here. The number of 1226 * the buttons is still a question, though. We assume 3. 1227 */ 1228 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1229 &max_proto, set_properties, true); 1230 1231 if (synaptics_hardware) { 1232 /* 1233 * We detected Synaptics hardware but it did not respond to 1234 * IMPS/2 probes. We need to reset the touchpad because if 1235 * there is a track point on the pass through port it could 1236 * get disabled while probing for protocol extensions. 1237 */ 1238 psmouse_reset(psmouse); 1239 } 1240 1241 return PSMOUSE_PS2; 1242 } 1243 1244 /* 1245 * psmouse_probe() probes for a PS/2 mouse. 1246 */ 1247 static int psmouse_probe(struct psmouse *psmouse) 1248 { 1249 struct ps2dev *ps2dev = &psmouse->ps2dev; 1250 u8 param[2]; 1251 int error; 1252 1253 /* 1254 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1255 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1256 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1257 * subsequent ID queries, probably due to a firmware bug. 1258 */ 1259 param[0] = 0xa5; 1260 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 1261 if (error) 1262 return error; 1263 1264 if (param[0] != 0x00 && param[0] != 0x03 && 1265 param[0] != 0x04 && param[0] != 0xff) 1266 return -ENODEV; 1267 1268 /* 1269 * Then we reset and disable the mouse so that it doesn't generate 1270 * events. 1271 */ 1272 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1273 if (error) 1274 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n", 1275 ps2dev->serio->phys, error); 1276 1277 return 0; 1278 } 1279 1280 /* 1281 * psmouse_initialize() initializes the mouse to a sane state. 1282 */ 1283 static void psmouse_initialize(struct psmouse *psmouse) 1284 { 1285 /* 1286 * We set the mouse report rate, resolution and scaling. 1287 */ 1288 if (psmouse_max_proto != PSMOUSE_PS2) { 1289 psmouse->set_rate(psmouse, psmouse->rate); 1290 psmouse->set_resolution(psmouse, psmouse->resolution); 1291 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1292 } 1293 } 1294 1295 /* 1296 * psmouse_activate() enables the mouse so that we get motion reports from it. 1297 */ 1298 int psmouse_activate(struct psmouse *psmouse) 1299 { 1300 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1301 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1302 psmouse->ps2dev.serio->phys); 1303 return -1; 1304 } 1305 1306 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1307 return 0; 1308 } 1309 1310 /* 1311 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1312 * motion reports from it unless we explicitly request it. 1313 */ 1314 int psmouse_deactivate(struct psmouse *psmouse) 1315 { 1316 int error; 1317 1318 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE); 1319 if (error) { 1320 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n", 1321 psmouse->ps2dev.serio->phys, error); 1322 return error; 1323 } 1324 1325 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1326 return 0; 1327 } 1328 1329 /* 1330 * psmouse_resync() attempts to re-validate current protocol. 1331 */ 1332 static void psmouse_resync(struct work_struct *work) 1333 { 1334 struct psmouse *parent = NULL, *psmouse = 1335 container_of(work, struct psmouse, resync_work.work); 1336 struct serio *serio = psmouse->ps2dev.serio; 1337 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1338 bool failed = false, enabled = false; 1339 int i; 1340 1341 mutex_lock(&psmouse_mutex); 1342 1343 if (psmouse->state != PSMOUSE_RESYNCING) 1344 goto out; 1345 1346 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1347 parent = serio_get_drvdata(serio->parent); 1348 psmouse_deactivate(parent); 1349 } 1350 1351 /* 1352 * Some mice don't ACK commands sent while they are in the middle of 1353 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1354 * instead of ps2_command() which would wait for 200ms for an ACK 1355 * that may never come. 1356 * As an additional quirk ALPS touchpads may not only forget to ACK 1357 * disable command but will stop reporting taps, so if we see that 1358 * mouse at least once ACKs disable we will do full reconnect if ACK 1359 * is missing. 1360 */ 1361 psmouse->num_resyncs++; 1362 1363 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1364 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1365 failed = true; 1366 } else 1367 psmouse->acks_disable_command = true; 1368 1369 /* 1370 * Poll the mouse. If it was reset the packet will be shorter than 1371 * psmouse->pktsize and ps2_command will fail. We do not expect and 1372 * do not handle scenario when mouse "upgrades" its protocol while 1373 * disconnected since it would require additional delay. If we ever 1374 * see a mouse that does it we'll adjust the code. 1375 */ 1376 if (!failed) { 1377 if (psmouse->poll(psmouse)) 1378 failed = true; 1379 else { 1380 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1381 for (i = 0; i < psmouse->pktsize; i++) { 1382 psmouse->pktcnt++; 1383 rc = psmouse->protocol_handler(psmouse); 1384 if (rc != PSMOUSE_GOOD_DATA) 1385 break; 1386 } 1387 if (rc != PSMOUSE_FULL_PACKET) 1388 failed = true; 1389 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1390 } 1391 } 1392 1393 /* 1394 * Now try to enable mouse. We try to do that even if poll failed 1395 * and also repeat our attempts 5 times, otherwise we may be left 1396 * out with disabled mouse. 1397 */ 1398 for (i = 0; i < 5; i++) { 1399 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1400 enabled = true; 1401 break; 1402 } 1403 msleep(200); 1404 } 1405 1406 if (!enabled) { 1407 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1408 psmouse->ps2dev.serio->phys); 1409 failed = true; 1410 } 1411 1412 if (failed) { 1413 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1414 psmouse_info(psmouse, 1415 "resync failed, issuing reconnect request\n"); 1416 serio_reconnect(serio); 1417 } else 1418 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1419 1420 if (parent) 1421 psmouse_activate(parent); 1422 out: 1423 mutex_unlock(&psmouse_mutex); 1424 } 1425 1426 /* 1427 * psmouse_cleanup() resets the mouse into power-on state. 1428 */ 1429 static void psmouse_cleanup(struct serio *serio) 1430 { 1431 struct psmouse *psmouse = serio_get_drvdata(serio); 1432 struct psmouse *parent = NULL; 1433 1434 mutex_lock(&psmouse_mutex); 1435 1436 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1437 parent = serio_get_drvdata(serio->parent); 1438 psmouse_deactivate(parent); 1439 } 1440 1441 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1442 1443 /* 1444 * Disable stream mode so cleanup routine can proceed undisturbed. 1445 */ 1446 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1447 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1448 psmouse->ps2dev.serio->phys); 1449 1450 if (psmouse->cleanup) 1451 psmouse->cleanup(psmouse); 1452 1453 /* 1454 * Reset the mouse to defaults (bare PS/2 protocol). 1455 */ 1456 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1457 1458 /* 1459 * Some boxes, such as HP nx7400, get terribly confused if mouse 1460 * is not fully enabled before suspending/shutting down. 1461 */ 1462 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1463 1464 if (parent) { 1465 if (parent->pt_deactivate) 1466 parent->pt_deactivate(parent); 1467 1468 psmouse_activate(parent); 1469 } 1470 1471 mutex_unlock(&psmouse_mutex); 1472 } 1473 1474 /* 1475 * psmouse_disconnect() closes and frees. 1476 */ 1477 static void psmouse_disconnect(struct serio *serio) 1478 { 1479 struct psmouse *psmouse = serio_get_drvdata(serio); 1480 struct psmouse *parent = NULL; 1481 1482 mutex_lock(&psmouse_mutex); 1483 1484 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1485 1486 /* make sure we don't have a resync in progress */ 1487 mutex_unlock(&psmouse_mutex); 1488 flush_workqueue(kpsmoused_wq); 1489 mutex_lock(&psmouse_mutex); 1490 1491 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1492 parent = serio_get_drvdata(serio->parent); 1493 psmouse_deactivate(parent); 1494 } 1495 1496 if (psmouse->disconnect) 1497 psmouse->disconnect(psmouse); 1498 1499 if (parent && parent->pt_deactivate) 1500 parent->pt_deactivate(parent); 1501 1502 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1503 1504 serio_close(serio); 1505 serio_set_drvdata(serio, NULL); 1506 1507 if (psmouse->dev) 1508 input_unregister_device(psmouse->dev); 1509 1510 kfree(psmouse); 1511 1512 if (parent) 1513 psmouse_activate(parent); 1514 1515 mutex_unlock(&psmouse_mutex); 1516 } 1517 1518 static int psmouse_switch_protocol(struct psmouse *psmouse, 1519 const struct psmouse_protocol *proto) 1520 { 1521 const struct psmouse_protocol *selected_proto; 1522 struct input_dev *input_dev = psmouse->dev; 1523 enum psmouse_type type; 1524 1525 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1526 1527 if (proto && (proto->detect || proto->init)) { 1528 psmouse_apply_defaults(psmouse); 1529 1530 if (proto->detect && proto->detect(psmouse, true) < 0) 1531 return -1; 1532 1533 if (proto->init && proto->init(psmouse) < 0) 1534 return -1; 1535 1536 selected_proto = proto; 1537 } else { 1538 type = psmouse_extensions(psmouse, psmouse_max_proto, true); 1539 selected_proto = psmouse_protocol_by_type(type); 1540 } 1541 1542 psmouse->protocol = selected_proto; 1543 1544 /* 1545 * If mouse's packet size is 3 there is no point in polling the 1546 * device in hopes to detect protocol reset - we won't get less 1547 * than 3 bytes response anyhow. 1548 */ 1549 if (psmouse->pktsize == 3) 1550 psmouse->resync_time = 0; 1551 1552 /* 1553 * Some smart KVMs fake response to POLL command returning just 1554 * 3 bytes and messing up our resync logic, so if initial poll 1555 * fails we won't try polling the device anymore. Hopefully 1556 * such KVM will maintain initially selected protocol. 1557 */ 1558 if (psmouse->resync_time && psmouse->poll(psmouse)) 1559 psmouse->resync_time = 0; 1560 1561 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1562 selected_proto->name, psmouse->vendor, psmouse->name); 1563 1564 input_dev->name = psmouse->devname; 1565 input_dev->phys = psmouse->phys; 1566 input_dev->id.bustype = BUS_I8042; 1567 input_dev->id.vendor = 0x0002; 1568 input_dev->id.product = psmouse->protocol->type; 1569 input_dev->id.version = psmouse->model; 1570 1571 return 0; 1572 } 1573 1574 /* 1575 * psmouse_connect() is a callback from the serio module when 1576 * an unhandled serio port is found. 1577 */ 1578 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1579 { 1580 struct psmouse *psmouse, *parent = NULL; 1581 struct input_dev *input_dev; 1582 int retval = 0, error = -ENOMEM; 1583 1584 mutex_lock(&psmouse_mutex); 1585 1586 /* 1587 * If this is a pass-through port deactivate parent so the device 1588 * connected to this port can be successfully identified 1589 */ 1590 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1591 parent = serio_get_drvdata(serio->parent); 1592 psmouse_deactivate(parent); 1593 } 1594 1595 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1596 input_dev = input_allocate_device(); 1597 if (!psmouse || !input_dev) 1598 goto err_free; 1599 1600 ps2_init(&psmouse->ps2dev, serio); 1601 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1602 psmouse->dev = input_dev; 1603 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1604 1605 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1606 1607 serio_set_drvdata(serio, psmouse); 1608 1609 error = serio_open(serio, drv); 1610 if (error) 1611 goto err_clear_drvdata; 1612 1613 /* give PT device some time to settle down before probing */ 1614 if (serio->id.type == SERIO_PS_PSTHRU) 1615 usleep_range(10000, 15000); 1616 1617 if (psmouse_probe(psmouse) < 0) { 1618 error = -ENODEV; 1619 goto err_close_serio; 1620 } 1621 1622 psmouse->rate = psmouse_rate; 1623 psmouse->resolution = psmouse_resolution; 1624 psmouse->resetafter = psmouse_resetafter; 1625 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1626 psmouse->smartscroll = psmouse_smartscroll; 1627 1628 psmouse_switch_protocol(psmouse, NULL); 1629 1630 if (!psmouse->protocol->smbus_companion) { 1631 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1632 psmouse_initialize(psmouse); 1633 1634 error = input_register_device(input_dev); 1635 if (error) 1636 goto err_protocol_disconnect; 1637 } else { 1638 /* Smbus companion will be reporting events, not us. */ 1639 input_free_device(input_dev); 1640 psmouse->dev = input_dev = NULL; 1641 } 1642 1643 if (parent && parent->pt_activate) 1644 parent->pt_activate(parent); 1645 1646 /* 1647 * PS/2 devices having SMBus companions should stay disabled 1648 * on PS/2 side, in order to have SMBus part operable. 1649 */ 1650 if (!psmouse->protocol->smbus_companion) 1651 psmouse_activate(psmouse); 1652 1653 out: 1654 /* If this is a pass-through port the parent needs to be re-activated */ 1655 if (parent) 1656 psmouse_activate(parent); 1657 1658 mutex_unlock(&psmouse_mutex); 1659 return retval; 1660 1661 err_protocol_disconnect: 1662 if (psmouse->disconnect) 1663 psmouse->disconnect(psmouse); 1664 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1665 err_close_serio: 1666 serio_close(serio); 1667 err_clear_drvdata: 1668 serio_set_drvdata(serio, NULL); 1669 err_free: 1670 input_free_device(input_dev); 1671 kfree(psmouse); 1672 1673 retval = error; 1674 goto out; 1675 } 1676 1677 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect) 1678 { 1679 struct psmouse *psmouse = serio_get_drvdata(serio); 1680 struct psmouse *parent = NULL; 1681 int (*reconnect_handler)(struct psmouse *); 1682 enum psmouse_type type; 1683 int rc = -1; 1684 1685 mutex_lock(&psmouse_mutex); 1686 1687 if (fast_reconnect) { 1688 reconnect_handler = psmouse->fast_reconnect; 1689 if (!reconnect_handler) { 1690 rc = -ENOENT; 1691 goto out_unlock; 1692 } 1693 } else { 1694 reconnect_handler = psmouse->reconnect; 1695 } 1696 1697 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1698 parent = serio_get_drvdata(serio->parent); 1699 psmouse_deactivate(parent); 1700 } 1701 1702 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1703 1704 if (reconnect_handler) { 1705 if (reconnect_handler(psmouse)) 1706 goto out; 1707 } else { 1708 psmouse_reset(psmouse); 1709 1710 if (psmouse_probe(psmouse) < 0) 1711 goto out; 1712 1713 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1714 if (psmouse->protocol->type != type) 1715 goto out; 1716 } 1717 1718 /* 1719 * OK, the device type (and capabilities) match the old one, 1720 * we can continue using it, complete initialization 1721 */ 1722 if (!psmouse->protocol->smbus_companion) { 1723 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1724 psmouse_initialize(psmouse); 1725 } 1726 1727 if (parent && parent->pt_activate) 1728 parent->pt_activate(parent); 1729 1730 /* 1731 * PS/2 devices having SMBus companions should stay disabled 1732 * on PS/2 side, in order to have SMBus part operable. 1733 */ 1734 if (!psmouse->protocol->smbus_companion) 1735 psmouse_activate(psmouse); 1736 1737 rc = 0; 1738 1739 out: 1740 /* If this is a pass-through port the parent waits to be activated */ 1741 if (parent) 1742 psmouse_activate(parent); 1743 1744 out_unlock: 1745 mutex_unlock(&psmouse_mutex); 1746 return rc; 1747 } 1748 1749 static int psmouse_reconnect(struct serio *serio) 1750 { 1751 return __psmouse_reconnect(serio, false); 1752 } 1753 1754 static int psmouse_fast_reconnect(struct serio *serio) 1755 { 1756 return __psmouse_reconnect(serio, true); 1757 } 1758 1759 static struct serio_device_id psmouse_serio_ids[] = { 1760 { 1761 .type = SERIO_8042, 1762 .proto = SERIO_ANY, 1763 .id = SERIO_ANY, 1764 .extra = SERIO_ANY, 1765 }, 1766 { 1767 .type = SERIO_PS_PSTHRU, 1768 .proto = SERIO_ANY, 1769 .id = SERIO_ANY, 1770 .extra = SERIO_ANY, 1771 }, 1772 { 0 } 1773 }; 1774 1775 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1776 1777 static struct serio_driver psmouse_drv = { 1778 .driver = { 1779 .name = "psmouse", 1780 .dev_groups = psmouse_dev_groups, 1781 }, 1782 .description = DRIVER_DESC, 1783 .id_table = psmouse_serio_ids, 1784 .interrupt = psmouse_interrupt, 1785 .connect = psmouse_connect, 1786 .reconnect = psmouse_reconnect, 1787 .fast_reconnect = psmouse_fast_reconnect, 1788 .disconnect = psmouse_disconnect, 1789 .cleanup = psmouse_cleanup, 1790 }; 1791 1792 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1793 char *buf) 1794 { 1795 struct serio *serio = to_serio_port(dev); 1796 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1797 struct psmouse *psmouse = serio_get_drvdata(serio); 1798 1799 if (psmouse->protocol->smbus_companion && 1800 devattr != &psmouse_attr_protocol.dattr) 1801 return -ENOENT; 1802 1803 return attr->show(psmouse, attr->data, buf); 1804 } 1805 1806 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1807 const char *buf, size_t count) 1808 { 1809 struct serio *serio = to_serio_port(dev); 1810 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1811 struct psmouse *psmouse, *parent = NULL; 1812 int retval; 1813 1814 retval = mutex_lock_interruptible(&psmouse_mutex); 1815 if (retval) 1816 goto out; 1817 1818 psmouse = serio_get_drvdata(serio); 1819 1820 if (psmouse->protocol->smbus_companion && 1821 devattr != &psmouse_attr_protocol.dattr) { 1822 retval = -ENOENT; 1823 goto out_unlock; 1824 } 1825 1826 if (attr->protect) { 1827 if (psmouse->state == PSMOUSE_IGNORE) { 1828 retval = -ENODEV; 1829 goto out_unlock; 1830 } 1831 1832 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1833 parent = serio_get_drvdata(serio->parent); 1834 psmouse_deactivate(parent); 1835 } 1836 1837 if (!psmouse->protocol->smbus_companion) 1838 psmouse_deactivate(psmouse); 1839 } 1840 1841 retval = attr->set(psmouse, attr->data, buf, count); 1842 1843 if (attr->protect) { 1844 if (retval != -ENODEV && !psmouse->protocol->smbus_companion) 1845 psmouse_activate(psmouse); 1846 1847 if (parent) 1848 psmouse_activate(parent); 1849 } 1850 1851 out_unlock: 1852 mutex_unlock(&psmouse_mutex); 1853 out: 1854 return retval; 1855 } 1856 1857 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1858 { 1859 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1860 1861 return sprintf(buf, "%u\n", *field); 1862 } 1863 1864 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1865 { 1866 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1867 unsigned int value; 1868 int err; 1869 1870 err = kstrtouint(buf, 10, &value); 1871 if (err) 1872 return err; 1873 1874 *field = value; 1875 1876 return count; 1877 } 1878 1879 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1880 { 1881 return sprintf(buf, "%s\n", psmouse->protocol->name); 1882 } 1883 1884 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1885 { 1886 struct serio *serio = psmouse->ps2dev.serio; 1887 struct psmouse *parent = NULL; 1888 struct input_dev *old_dev, *new_dev; 1889 const struct psmouse_protocol *proto, *old_proto; 1890 int error; 1891 int retry = 0; 1892 1893 proto = psmouse_protocol_by_name(buf, count); 1894 if (!proto) 1895 return -EINVAL; 1896 1897 if (psmouse->protocol == proto) 1898 return count; 1899 1900 new_dev = input_allocate_device(); 1901 if (!new_dev) 1902 return -ENOMEM; 1903 1904 while (!list_empty(&serio->children)) { 1905 if (++retry > 3) { 1906 psmouse_warn(psmouse, 1907 "failed to destroy children ports, protocol change aborted.\n"); 1908 input_free_device(new_dev); 1909 return -EIO; 1910 } 1911 1912 mutex_unlock(&psmouse_mutex); 1913 serio_unregister_child_port(serio); 1914 mutex_lock(&psmouse_mutex); 1915 1916 if (serio->drv != &psmouse_drv) { 1917 input_free_device(new_dev); 1918 return -ENODEV; 1919 } 1920 1921 if (psmouse->protocol == proto) { 1922 input_free_device(new_dev); 1923 return count; /* switched by other thread */ 1924 } 1925 } 1926 1927 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1928 parent = serio_get_drvdata(serio->parent); 1929 if (parent->pt_deactivate) 1930 parent->pt_deactivate(parent); 1931 } 1932 1933 old_dev = psmouse->dev; 1934 old_proto = psmouse->protocol; 1935 1936 if (psmouse->disconnect) 1937 psmouse->disconnect(psmouse); 1938 1939 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1940 1941 psmouse->dev = new_dev; 1942 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1943 1944 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1945 psmouse_reset(psmouse); 1946 /* default to PSMOUSE_PS2 */ 1947 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1948 } 1949 1950 psmouse_initialize(psmouse); 1951 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1952 1953 if (psmouse->protocol->smbus_companion) { 1954 input_free_device(psmouse->dev); 1955 psmouse->dev = NULL; 1956 } else { 1957 error = input_register_device(psmouse->dev); 1958 if (error) { 1959 if (psmouse->disconnect) 1960 psmouse->disconnect(psmouse); 1961 1962 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1963 input_free_device(new_dev); 1964 psmouse->dev = old_dev; 1965 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1966 psmouse_switch_protocol(psmouse, old_proto); 1967 psmouse_initialize(psmouse); 1968 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1969 1970 return error; 1971 } 1972 } 1973 1974 if (old_dev) 1975 input_unregister_device(old_dev); 1976 1977 if (parent && parent->pt_activate) 1978 parent->pt_activate(parent); 1979 1980 return count; 1981 } 1982 1983 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1984 { 1985 unsigned int value; 1986 int err; 1987 1988 err = kstrtouint(buf, 10, &value); 1989 if (err) 1990 return err; 1991 1992 psmouse->set_rate(psmouse, value); 1993 return count; 1994 } 1995 1996 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1997 { 1998 unsigned int value; 1999 int err; 2000 2001 err = kstrtouint(buf, 10, &value); 2002 if (err) 2003 return err; 2004 2005 psmouse->set_resolution(psmouse, value); 2006 return count; 2007 } 2008 2009 2010 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 2011 { 2012 const struct psmouse_protocol *proto; 2013 2014 if (!val) 2015 return -EINVAL; 2016 2017 proto = psmouse_protocol_by_name(val, strlen(val)); 2018 2019 if (!proto || !proto->maxproto) 2020 return -EINVAL; 2021 2022 *((unsigned int *)kp->arg) = proto->type; 2023 2024 return 0; 2025 } 2026 2027 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 2028 { 2029 int type = *((unsigned int *)kp->arg); 2030 2031 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 2032 } 2033 2034 static int __init psmouse_init(void) 2035 { 2036 int err; 2037 2038 lifebook_module_init(); 2039 synaptics_module_init(); 2040 hgpk_module_init(); 2041 2042 err = psmouse_smbus_module_init(); 2043 if (err) 2044 return err; 2045 2046 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); 2047 if (!kpsmoused_wq) { 2048 pr_err("failed to create kpsmoused workqueue\n"); 2049 err = -ENOMEM; 2050 goto err_smbus_exit; 2051 } 2052 2053 err = serio_register_driver(&psmouse_drv); 2054 if (err) 2055 goto err_destroy_wq; 2056 2057 return 0; 2058 2059 err_destroy_wq: 2060 destroy_workqueue(kpsmoused_wq); 2061 err_smbus_exit: 2062 psmouse_smbus_module_exit(); 2063 return err; 2064 } 2065 2066 static void __exit psmouse_exit(void) 2067 { 2068 serio_unregister_driver(&psmouse_drv); 2069 destroy_workqueue(kpsmoused_wq); 2070 psmouse_smbus_module_exit(); 2071 } 2072 2073 module_init(psmouse_init); 2074 module_exit(psmouse_exit); 2075