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 #include "pixart_ps2.h" 40 41 #define DRIVER_DESC "PS/2 mouse driver" 42 43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 44 MODULE_DESCRIPTION(DRIVER_DESC); 45 MODULE_LICENSE("GPL"); 46 47 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 48 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 49 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 50 static const struct kernel_param_ops param_ops_proto_abbrev = { 51 .set = psmouse_set_maxproto, 52 .get = psmouse_get_maxproto, 53 }; 54 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 55 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 56 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 57 58 static unsigned int psmouse_resolution = 200; 59 module_param_named(resolution, psmouse_resolution, uint, 0644); 60 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 61 62 static unsigned int psmouse_rate = 100; 63 module_param_named(rate, psmouse_rate, uint, 0644); 64 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 65 66 static bool psmouse_smartscroll = true; 67 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 68 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 69 70 static bool psmouse_a4tech_2wheels; 71 module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644); 72 MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default)."); 73 74 static unsigned int psmouse_resetafter = 5; 75 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 76 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 77 78 static unsigned int psmouse_resync_time; 79 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 80 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 81 82 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 83 NULL, 84 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 85 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 86 (void *) offsetof(struct psmouse, rate), 87 psmouse_show_int_attr, psmouse_attr_set_rate); 88 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 89 (void *) offsetof(struct psmouse, resolution), 90 psmouse_show_int_attr, psmouse_attr_set_resolution); 91 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 92 (void *) offsetof(struct psmouse, resetafter), 93 psmouse_show_int_attr, psmouse_set_int_attr); 94 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 95 (void *) offsetof(struct psmouse, resync_time), 96 psmouse_show_int_attr, psmouse_set_int_attr); 97 98 static struct attribute *psmouse_dev_attrs[] = { 99 &psmouse_attr_protocol.dattr.attr, 100 &psmouse_attr_rate.dattr.attr, 101 &psmouse_attr_resolution.dattr.attr, 102 &psmouse_attr_resetafter.dattr.attr, 103 &psmouse_attr_resync_time.dattr.attr, 104 NULL 105 }; 106 107 ATTRIBUTE_GROUPS(psmouse_dev); 108 109 /* 110 * psmouse_mutex protects all operations changing state of mouse 111 * (connecting, disconnecting, changing rate or resolution via 112 * sysfs). We could use a per-device semaphore but since there 113 * rarely more than one PS/2 mouse connected and since semaphore 114 * is taken in "slow" paths it is not worth it. 115 */ 116 static DEFINE_MUTEX(psmouse_mutex); 117 118 static struct workqueue_struct *kpsmoused_wq; 119 120 struct psmouse *psmouse_from_serio(struct serio *serio) 121 { 122 struct ps2dev *ps2dev = serio_get_drvdata(serio); 123 124 return container_of(ps2dev, struct psmouse, ps2dev); 125 } 126 127 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons) 128 { 129 input_report_key(dev, BTN_LEFT, buttons & BIT(0)); 130 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2)); 131 input_report_key(dev, BTN_RIGHT, buttons & BIT(1)); 132 } 133 134 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet) 135 { 136 int x, y; 137 138 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0; 139 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0; 140 141 input_report_rel(dev, REL_X, x); 142 input_report_rel(dev, REL_Y, -y); 143 } 144 145 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet) 146 { 147 psmouse_report_standard_buttons(dev, packet[0]); 148 psmouse_report_standard_motion(dev, packet); 149 } 150 151 /* 152 * psmouse_process_byte() analyzes the PS/2 data stream and reports 153 * relevant events to the input module once full packet has arrived. 154 */ 155 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 156 { 157 struct input_dev *dev = psmouse->dev; 158 u8 *packet = psmouse->packet; 159 int wheel; 160 161 if (psmouse->pktcnt < psmouse->pktsize) 162 return PSMOUSE_GOOD_DATA; 163 164 /* Full packet accumulated, process it */ 165 166 switch (psmouse->protocol->type) { 167 case PSMOUSE_IMPS: 168 /* IntelliMouse has scroll wheel */ 169 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 170 break; 171 172 case PSMOUSE_IMEX: 173 /* Scroll wheel and buttons on IntelliMouse Explorer */ 174 switch (packet[3] & 0xC0) { 175 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 176 input_report_rel(dev, REL_WHEEL, 177 -sign_extend32(packet[3], 5)); 178 break; 179 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 180 input_report_rel(dev, REL_HWHEEL, 181 -sign_extend32(packet[3], 5)); 182 break; 183 case 0x00: 184 case 0xC0: 185 wheel = sign_extend32(packet[3], 3); 186 187 /* 188 * Some A4Tech mice have two scroll wheels, with first 189 * one reporting +/-1 in the lower nibble, and second 190 * one reporting +/-2. 191 */ 192 if (psmouse_a4tech_2wheels && abs(wheel) > 1) 193 input_report_rel(dev, REL_HWHEEL, wheel / 2); 194 else 195 input_report_rel(dev, REL_WHEEL, -wheel); 196 197 input_report_key(dev, BTN_SIDE, packet[3] & BIT(4)); 198 input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5)); 199 break; 200 } 201 break; 202 203 case PSMOUSE_GENPS: 204 /* Report scroll buttons on NetMice */ 205 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); 206 207 /* Extra buttons on Genius NewNet 3D */ 208 input_report_key(dev, BTN_SIDE, packet[0] & BIT(6)); 209 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7)); 210 break; 211 212 case PSMOUSE_THINKPS: 213 /* Extra button on ThinkingMouse */ 214 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3)); 215 216 /* 217 * Without this bit of weirdness moving up gives wildly 218 * high Y changes. 219 */ 220 packet[1] |= (packet[0] & 0x40) << 1; 221 break; 222 223 case PSMOUSE_CORTRON: 224 /* 225 * Cortron PS2 Trackball reports SIDE button in the 226 * 4th bit of the first byte. 227 */ 228 input_report_key(dev, BTN_SIDE, packet[0] & BIT(3)); 229 packet[0] |= BIT(3); 230 break; 231 232 default: 233 break; 234 } 235 236 /* Generic PS/2 Mouse */ 237 packet[0] |= psmouse->extra_buttons; 238 psmouse_report_standard_packet(dev, packet); 239 240 input_sync(dev); 241 242 return PSMOUSE_FULL_PACKET; 243 } 244 245 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 246 unsigned long delay) 247 { 248 queue_delayed_work(kpsmoused_wq, work, delay); 249 } 250 251 /* 252 * __psmouse_set_state() sets new psmouse state and resets all flags. 253 */ 254 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 255 { 256 psmouse->state = new_state; 257 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 258 psmouse->ps2dev.flags = 0; 259 psmouse->last = jiffies; 260 } 261 262 /* 263 * psmouse_set_state() sets new psmouse state and resets all flags and 264 * counters while holding serio lock so fighting with interrupt handler 265 * is not a concern. 266 */ 267 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 268 { 269 serio_pause_rx(psmouse->ps2dev.serio); 270 __psmouse_set_state(psmouse, new_state); 271 serio_continue_rx(psmouse->ps2dev.serio); 272 } 273 274 /* 275 * psmouse_handle_byte() processes one byte of the input data stream 276 * by calling corresponding protocol handler. 277 */ 278 static int psmouse_handle_byte(struct psmouse *psmouse) 279 { 280 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 281 282 switch (rc) { 283 case PSMOUSE_BAD_DATA: 284 if (psmouse->state == PSMOUSE_ACTIVATED) { 285 psmouse_warn(psmouse, 286 "%s at %s lost sync at byte %d\n", 287 psmouse->name, psmouse->phys, 288 psmouse->pktcnt); 289 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 290 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 291 psmouse_notice(psmouse, 292 "issuing reconnect request\n"); 293 serio_reconnect(psmouse->ps2dev.serio); 294 return -EIO; 295 } 296 } 297 psmouse->pktcnt = 0; 298 break; 299 300 case PSMOUSE_FULL_PACKET: 301 psmouse->pktcnt = 0; 302 if (psmouse->out_of_sync_cnt) { 303 psmouse->out_of_sync_cnt = 0; 304 psmouse_notice(psmouse, 305 "%s at %s - driver resynced.\n", 306 psmouse->name, psmouse->phys); 307 } 308 break; 309 310 case PSMOUSE_GOOD_DATA: 311 break; 312 } 313 return 0; 314 } 315 316 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data) 317 { 318 switch (psmouse->oob_data_type) { 319 case PSMOUSE_OOB_NONE: 320 psmouse->oob_data_type = data; 321 break; 322 323 case PSMOUSE_OOB_EXTRA_BTNS: 324 psmouse_report_standard_buttons(psmouse->dev, data); 325 input_sync(psmouse->dev); 326 327 psmouse->extra_buttons = data; 328 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 329 break; 330 331 default: 332 psmouse_warn(psmouse, 333 "unknown OOB_DATA type: 0x%02x\n", 334 psmouse->oob_data_type); 335 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 336 break; 337 } 338 } 339 340 static enum ps2_disposition psmouse_pre_receive_byte(struct ps2dev *ps2dev, 341 u8 data, 342 unsigned int flags) 343 { 344 struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev); 345 346 if (psmouse->state == PSMOUSE_IGNORE) 347 return PS2_IGNORE; 348 349 if (unlikely((flags & SERIO_TIMEOUT) || 350 ((flags & SERIO_PARITY) && 351 !psmouse->protocol->ignore_parity))) { 352 353 if (psmouse->state == PSMOUSE_ACTIVATED) 354 psmouse_warn(psmouse, 355 "bad data from KBC -%s%s\n", 356 flags & SERIO_TIMEOUT ? " timeout" : "", 357 flags & SERIO_PARITY ? " bad parity" : ""); 358 return PS2_ERROR; 359 } 360 361 if (flags & SERIO_OOB_DATA) { 362 psmouse_handle_oob_data(psmouse, data); 363 return PS2_IGNORE; 364 } 365 366 return PS2_PROCESS; 367 } 368 369 static void psmouse_receive_byte(struct ps2dev *ps2dev, u8 data) 370 { 371 struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev); 372 373 pm_wakeup_event(&ps2dev->serio->dev, 0); 374 375 if (psmouse->state <= PSMOUSE_RESYNCING) 376 return; 377 378 if (psmouse->state == PSMOUSE_ACTIVATED && 379 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 380 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 381 psmouse->name, psmouse->phys, psmouse->pktcnt); 382 psmouse->badbyte = psmouse->packet[0]; 383 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 384 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 385 return; 386 } 387 388 psmouse->packet[psmouse->pktcnt++] = data; 389 390 /* Check if this is a new device announcement (0xAA 0x00) */ 391 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 392 if (psmouse->pktcnt == 1) { 393 psmouse->last = jiffies; 394 return; 395 } 396 397 if (psmouse->packet[1] == PSMOUSE_RET_ID || 398 (psmouse->protocol->type == PSMOUSE_HGPK && 399 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 400 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 401 serio_reconnect(ps2dev->serio); 402 return; 403 } 404 405 /* Not a new device, try processing first byte normally */ 406 psmouse->pktcnt = 1; 407 if (psmouse_handle_byte(psmouse)) 408 return; 409 410 psmouse->packet[psmouse->pktcnt++] = data; 411 } 412 413 /* 414 * See if we need to force resync because mouse was idle for 415 * too long. 416 */ 417 if (psmouse->state == PSMOUSE_ACTIVATED && 418 psmouse->pktcnt == 1 && psmouse->resync_time && 419 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 420 psmouse->badbyte = psmouse->packet[0]; 421 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 422 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 423 return; 424 } 425 426 psmouse->last = jiffies; 427 psmouse_handle_byte(psmouse); 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 #ifdef CONFIG_MOUSE_PS2_PIXART 911 { 912 .type = PSMOUSE_PIXART, 913 .name = "PixArtPS/2", 914 .alias = "pixart", 915 .detect = pixart_detect, 916 .init = pixart_init, 917 }, 918 #endif 919 { 920 .type = PSMOUSE_AUTO, 921 .name = "auto", 922 .alias = "any", 923 .maxproto = true, 924 }, 925 }; 926 927 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type) 928 { 929 int i; 930 931 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 932 if (psmouse_protocols[i].type == type) 933 return &psmouse_protocols[i]; 934 935 return NULL; 936 } 937 938 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 939 { 940 const struct psmouse_protocol *proto; 941 942 proto = __psmouse_protocol_by_type(type); 943 if (proto) 944 return proto; 945 946 WARN_ON(1); 947 return &psmouse_protocols[0]; 948 } 949 950 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 951 { 952 const struct psmouse_protocol *p; 953 int i; 954 955 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 956 p = &psmouse_protocols[i]; 957 958 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 959 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 960 return &psmouse_protocols[i]; 961 } 962 963 return NULL; 964 } 965 966 /* 967 * Apply default settings to the psmouse structure. Most of them will 968 * be overridden by individual protocol initialization routines. 969 */ 970 static void psmouse_apply_defaults(struct psmouse *psmouse) 971 { 972 struct input_dev *input_dev = psmouse->dev; 973 974 bitmap_zero(input_dev->evbit, EV_CNT); 975 bitmap_zero(input_dev->keybit, KEY_CNT); 976 bitmap_zero(input_dev->relbit, REL_CNT); 977 bitmap_zero(input_dev->absbit, ABS_CNT); 978 bitmap_zero(input_dev->mscbit, MSC_CNT); 979 980 input_set_capability(input_dev, EV_KEY, BTN_LEFT); 981 input_set_capability(input_dev, EV_KEY, BTN_RIGHT); 982 983 input_set_capability(input_dev, EV_REL, REL_X); 984 input_set_capability(input_dev, EV_REL, REL_Y); 985 986 __set_bit(INPUT_PROP_POINTER, input_dev->propbit); 987 988 psmouse->protocol = &psmouse_protocols[0]; 989 990 psmouse->set_rate = psmouse_set_rate; 991 psmouse->set_resolution = psmouse_set_resolution; 992 psmouse->set_scale = psmouse_set_scale; 993 psmouse->poll = psmouse_poll; 994 psmouse->protocol_handler = psmouse_process_byte; 995 psmouse->pktsize = 3; 996 psmouse->reconnect = NULL; 997 psmouse->fast_reconnect = NULL; 998 psmouse->disconnect = NULL; 999 psmouse->cleanup = NULL; 1000 psmouse->pt_activate = NULL; 1001 psmouse->pt_deactivate = NULL; 1002 } 1003 1004 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool), 1005 struct psmouse *psmouse, bool allow_passthrough, 1006 bool set_properties) 1007 { 1008 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 1009 !allow_passthrough) { 1010 return false; 1011 } 1012 1013 if (set_properties) 1014 psmouse_apply_defaults(psmouse); 1015 1016 return detect(psmouse, set_properties) == 0; 1017 } 1018 1019 static bool psmouse_try_protocol(struct psmouse *psmouse, 1020 enum psmouse_type type, 1021 unsigned int *max_proto, 1022 bool set_properties, bool init_allowed) 1023 { 1024 const struct psmouse_protocol *proto; 1025 1026 proto = __psmouse_protocol_by_type(type); 1027 if (!proto) 1028 return false; 1029 1030 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru, 1031 set_properties)) 1032 return false; 1033 1034 if (set_properties && proto->init && init_allowed) { 1035 if (proto->init(psmouse) != 0) { 1036 /* 1037 * We detected device, but init failed. Adjust 1038 * max_proto so we only try standard protocols. 1039 */ 1040 if (*max_proto > PSMOUSE_IMEX) 1041 *max_proto = PSMOUSE_IMEX; 1042 1043 return false; 1044 } 1045 } 1046 1047 return true; 1048 } 1049 1050 /* 1051 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 1052 * the mouse may have. 1053 */ 1054 static int psmouse_extensions(struct psmouse *psmouse, 1055 unsigned int max_proto, bool set_properties) 1056 { 1057 bool synaptics_hardware = false; 1058 int ret; 1059 1060 /* 1061 * Always check for focaltech, this is safe as it uses pnp-id 1062 * matching. 1063 */ 1064 if (psmouse_do_detect(focaltech_detect, 1065 psmouse, false, set_properties)) { 1066 if (max_proto > PSMOUSE_IMEX && 1067 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 1068 (!set_properties || focaltech_init(psmouse) == 0)) { 1069 return PSMOUSE_FOCALTECH; 1070 } 1071 /* 1072 * Restrict psmouse_max_proto so that psmouse_initialize() 1073 * does not try to reset rate and resolution, because even 1074 * that upsets the device. 1075 * This also causes us to basically fall through to basic 1076 * protocol detection, where we fully reset the mouse, 1077 * and set it up as bare PS/2 protocol device. 1078 */ 1079 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1080 } 1081 1082 /* 1083 * We always check for LifeBook because it does not disturb mouse 1084 * (it only checks DMI information). 1085 */ 1086 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1087 set_properties, max_proto > PSMOUSE_IMEX)) 1088 return PSMOUSE_LIFEBOOK; 1089 1090 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1091 set_properties, max_proto > PSMOUSE_IMEX)) 1092 return PSMOUSE_VMMOUSE; 1093 1094 /* 1095 * Try Kensington ThinkingMouse (we try first, because Synaptics 1096 * probe upsets the ThinkingMouse). 1097 */ 1098 if (max_proto > PSMOUSE_IMEX && 1099 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1100 set_properties, true)) { 1101 return PSMOUSE_THINKPS; 1102 } 1103 1104 /* 1105 * Try Synaptics TouchPad. Note that probing is done even if 1106 * Synaptics protocol support is disabled in config - we need to 1107 * know if it is Synaptics so we can reset it properly after 1108 * probing for IntelliMouse. 1109 */ 1110 if (max_proto > PSMOUSE_PS2 && 1111 psmouse_do_detect(synaptics_detect, 1112 psmouse, false, set_properties)) { 1113 synaptics_hardware = true; 1114 1115 if (max_proto > PSMOUSE_IMEX) { 1116 /* 1117 * Try activating protocol, but check if support is 1118 * enabled first, since we try detecting Synaptics 1119 * even when protocol is disabled. 1120 */ 1121 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || 1122 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { 1123 if (!set_properties) 1124 return PSMOUSE_SYNAPTICS; 1125 1126 ret = synaptics_init(psmouse); 1127 if (ret >= 0) 1128 return ret; 1129 } 1130 1131 /* 1132 * Some Synaptics touchpads can emulate extended 1133 * protocols (like IMPS/2). Unfortunately 1134 * Logitech/Genius probes confuse some firmware 1135 * versions so we'll have to skip them. 1136 */ 1137 max_proto = PSMOUSE_IMEX; 1138 } 1139 1140 /* 1141 * Make sure that touchpad is in relative mode, gestures 1142 * (taps) are enabled. 1143 */ 1144 synaptics_reset(psmouse); 1145 } 1146 1147 /* 1148 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1149 * because Finger Sensing Pad probe upsets some modules of Cypress 1150 * Trackpads. 1151 */ 1152 if (max_proto > PSMOUSE_IMEX && 1153 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1154 set_properties, true)) { 1155 return PSMOUSE_CYPRESS; 1156 } 1157 1158 /* Try ALPS TouchPad */ 1159 if (max_proto > PSMOUSE_IMEX) { 1160 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1161 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1162 &max_proto, set_properties, true)) 1163 return PSMOUSE_ALPS; 1164 } 1165 1166 /* Try OLPC HGPK touchpad */ 1167 if (max_proto > PSMOUSE_IMEX && 1168 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1169 set_properties, true)) { 1170 return PSMOUSE_HGPK; 1171 } 1172 1173 /* Try Elantech touchpad */ 1174 if (max_proto > PSMOUSE_IMEX && 1175 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1176 &max_proto, set_properties, false)) { 1177 if (!set_properties) 1178 return PSMOUSE_ELANTECH; 1179 1180 ret = elantech_init(psmouse); 1181 if (ret >= 0) 1182 return ret; 1183 } 1184 1185 /* Try PixArt touchpad */ 1186 if (max_proto > PSMOUSE_IMEX && 1187 psmouse_try_protocol(psmouse, PSMOUSE_PIXART, &max_proto, 1188 set_properties, true)) { 1189 return PSMOUSE_PIXART; 1190 } 1191 1192 if (max_proto > PSMOUSE_IMEX) { 1193 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1194 &max_proto, set_properties, true)) 1195 return PSMOUSE_GENPS; 1196 1197 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1198 &max_proto, set_properties, true)) 1199 return PSMOUSE_PS2PP; 1200 1201 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1202 &max_proto, set_properties, true)) 1203 return PSMOUSE_TRACKPOINT; 1204 1205 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1206 &max_proto, set_properties, true)) 1207 return PSMOUSE_TOUCHKIT_PS2; 1208 } 1209 1210 /* 1211 * Try Finger Sensing Pad. We do it here because its probe upsets 1212 * Trackpoint devices (causing TP_READ_ID command to time out). 1213 */ 1214 if (max_proto > PSMOUSE_IMEX && 1215 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1216 &max_proto, set_properties, true)) { 1217 return PSMOUSE_FSP; 1218 } 1219 1220 /* 1221 * Reset to defaults in case the device got confused by extended 1222 * protocol probes. Note that we follow up with full reset because 1223 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1224 */ 1225 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1226 psmouse_reset(psmouse); 1227 1228 if (max_proto >= PSMOUSE_IMEX && 1229 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1230 &max_proto, set_properties, true)) { 1231 return PSMOUSE_IMEX; 1232 } 1233 1234 if (max_proto >= PSMOUSE_IMPS && 1235 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1236 &max_proto, set_properties, true)) { 1237 return PSMOUSE_IMPS; 1238 } 1239 1240 /* 1241 * Okay, all failed, we have a standard mouse here. The number of 1242 * the buttons is still a question, though. We assume 3. 1243 */ 1244 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1245 &max_proto, set_properties, true); 1246 1247 if (synaptics_hardware) { 1248 /* 1249 * We detected Synaptics hardware but it did not respond to 1250 * IMPS/2 probes. We need to reset the touchpad because if 1251 * there is a track point on the pass through port it could 1252 * get disabled while probing for protocol extensions. 1253 */ 1254 psmouse_reset(psmouse); 1255 } 1256 1257 return PSMOUSE_PS2; 1258 } 1259 1260 /* 1261 * psmouse_probe() probes for a PS/2 mouse. 1262 */ 1263 static int psmouse_probe(struct psmouse *psmouse) 1264 { 1265 struct ps2dev *ps2dev = &psmouse->ps2dev; 1266 u8 param[2]; 1267 int error; 1268 1269 /* 1270 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1271 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1272 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1273 * subsequent ID queries, probably due to a firmware bug. 1274 */ 1275 param[0] = 0xa5; 1276 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 1277 if (error) 1278 return error; 1279 1280 if (param[0] != 0x00 && param[0] != 0x03 && 1281 param[0] != 0x04 && param[0] != 0xff) 1282 return -ENODEV; 1283 1284 /* 1285 * Then we reset and disable the mouse so that it doesn't generate 1286 * events. 1287 */ 1288 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1289 if (error) 1290 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n", 1291 ps2dev->serio->phys, error); 1292 1293 return 0; 1294 } 1295 1296 /* 1297 * psmouse_initialize() initializes the mouse to a sane state. 1298 */ 1299 static void psmouse_initialize(struct psmouse *psmouse) 1300 { 1301 /* 1302 * We set the mouse report rate, resolution and scaling. 1303 */ 1304 if (psmouse_max_proto != PSMOUSE_PS2) { 1305 psmouse->set_rate(psmouse, psmouse->rate); 1306 psmouse->set_resolution(psmouse, psmouse->resolution); 1307 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1308 } 1309 } 1310 1311 /* 1312 * psmouse_activate() enables the mouse so that we get motion reports from it. 1313 */ 1314 int psmouse_activate(struct psmouse *psmouse) 1315 { 1316 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1317 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1318 psmouse->ps2dev.serio->phys); 1319 return -1; 1320 } 1321 1322 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1323 return 0; 1324 } 1325 1326 /* 1327 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1328 * motion reports from it unless we explicitly request it. 1329 */ 1330 int psmouse_deactivate(struct psmouse *psmouse) 1331 { 1332 int error; 1333 1334 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE); 1335 if (error) { 1336 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n", 1337 psmouse->ps2dev.serio->phys, error); 1338 return error; 1339 } 1340 1341 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1342 return 0; 1343 } 1344 1345 /* 1346 * psmouse_resync() attempts to re-validate current protocol. 1347 */ 1348 static void psmouse_resync(struct work_struct *work) 1349 { 1350 struct psmouse *parent = NULL, *psmouse = 1351 container_of(work, struct psmouse, resync_work.work); 1352 struct serio *serio = psmouse->ps2dev.serio; 1353 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1354 bool failed = false, enabled = false; 1355 int i; 1356 1357 mutex_lock(&psmouse_mutex); 1358 1359 if (psmouse->state != PSMOUSE_RESYNCING) 1360 goto out; 1361 1362 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1363 parent = psmouse_from_serio(serio->parent); 1364 psmouse_deactivate(parent); 1365 } 1366 1367 /* 1368 * Some mice don't ACK commands sent while they are in the middle of 1369 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1370 * instead of ps2_command() which would wait for 200ms for an ACK 1371 * that may never come. 1372 * As an additional quirk ALPS touchpads may not only forget to ACK 1373 * disable command but will stop reporting taps, so if we see that 1374 * mouse at least once ACKs disable we will do full reconnect if ACK 1375 * is missing. 1376 */ 1377 psmouse->num_resyncs++; 1378 1379 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1380 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1381 failed = true; 1382 } else 1383 psmouse->acks_disable_command = true; 1384 1385 /* 1386 * Poll the mouse. If it was reset the packet will be shorter than 1387 * psmouse->pktsize and ps2_command will fail. We do not expect and 1388 * do not handle scenario when mouse "upgrades" its protocol while 1389 * disconnected since it would require additional delay. If we ever 1390 * see a mouse that does it we'll adjust the code. 1391 */ 1392 if (!failed) { 1393 if (psmouse->poll(psmouse)) 1394 failed = true; 1395 else { 1396 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1397 for (i = 0; i < psmouse->pktsize; i++) { 1398 psmouse->pktcnt++; 1399 rc = psmouse->protocol_handler(psmouse); 1400 if (rc != PSMOUSE_GOOD_DATA) 1401 break; 1402 } 1403 if (rc != PSMOUSE_FULL_PACKET) 1404 failed = true; 1405 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1406 } 1407 } 1408 1409 /* 1410 * Now try to enable mouse. We try to do that even if poll failed 1411 * and also repeat our attempts 5 times, otherwise we may be left 1412 * out with disabled mouse. 1413 */ 1414 for (i = 0; i < 5; i++) { 1415 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1416 enabled = true; 1417 break; 1418 } 1419 msleep(200); 1420 } 1421 1422 if (!enabled) { 1423 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1424 psmouse->ps2dev.serio->phys); 1425 failed = true; 1426 } 1427 1428 if (failed) { 1429 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1430 psmouse_info(psmouse, 1431 "resync failed, issuing reconnect request\n"); 1432 serio_reconnect(serio); 1433 } else 1434 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1435 1436 if (parent) 1437 psmouse_activate(parent); 1438 out: 1439 mutex_unlock(&psmouse_mutex); 1440 } 1441 1442 /* 1443 * psmouse_cleanup() resets the mouse into power-on state. 1444 */ 1445 static void psmouse_cleanup(struct serio *serio) 1446 { 1447 struct psmouse *psmouse = psmouse_from_serio(serio); 1448 struct psmouse *parent = NULL; 1449 1450 mutex_lock(&psmouse_mutex); 1451 1452 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1453 parent = psmouse_from_serio(serio->parent); 1454 psmouse_deactivate(parent); 1455 } 1456 1457 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1458 1459 /* 1460 * Disable stream mode so cleanup routine can proceed undisturbed. 1461 */ 1462 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1463 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1464 psmouse->ps2dev.serio->phys); 1465 1466 if (psmouse->cleanup) 1467 psmouse->cleanup(psmouse); 1468 1469 /* 1470 * Reset the mouse to defaults (bare PS/2 protocol). 1471 */ 1472 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1473 1474 /* 1475 * Some boxes, such as HP nx7400, get terribly confused if mouse 1476 * is not fully enabled before suspending/shutting down. 1477 */ 1478 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1479 1480 if (parent) { 1481 if (parent->pt_deactivate) 1482 parent->pt_deactivate(parent); 1483 1484 psmouse_activate(parent); 1485 } 1486 1487 mutex_unlock(&psmouse_mutex); 1488 } 1489 1490 /* 1491 * psmouse_disconnect() closes and frees. 1492 */ 1493 static void psmouse_disconnect(struct serio *serio) 1494 { 1495 struct psmouse *psmouse = psmouse_from_serio(serio); 1496 struct psmouse *parent = NULL; 1497 1498 mutex_lock(&psmouse_mutex); 1499 1500 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1501 1502 /* make sure we don't have a resync in progress */ 1503 mutex_unlock(&psmouse_mutex); 1504 flush_workqueue(kpsmoused_wq); 1505 mutex_lock(&psmouse_mutex); 1506 1507 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1508 parent = psmouse_from_serio(serio->parent); 1509 psmouse_deactivate(parent); 1510 } 1511 1512 if (psmouse->disconnect) 1513 psmouse->disconnect(psmouse); 1514 1515 if (parent && parent->pt_deactivate) 1516 parent->pt_deactivate(parent); 1517 1518 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1519 1520 serio_close(serio); 1521 serio_set_drvdata(serio, NULL); 1522 1523 if (psmouse->dev) 1524 input_unregister_device(psmouse->dev); 1525 1526 kfree(psmouse); 1527 1528 if (parent) 1529 psmouse_activate(parent); 1530 1531 mutex_unlock(&psmouse_mutex); 1532 } 1533 1534 static int psmouse_switch_protocol(struct psmouse *psmouse, 1535 const struct psmouse_protocol *proto) 1536 { 1537 const struct psmouse_protocol *selected_proto; 1538 struct input_dev *input_dev = psmouse->dev; 1539 enum psmouse_type type; 1540 1541 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1542 1543 if (proto && (proto->detect || proto->init)) { 1544 psmouse_apply_defaults(psmouse); 1545 1546 if (proto->detect && proto->detect(psmouse, true) < 0) 1547 return -1; 1548 1549 if (proto->init && proto->init(psmouse) < 0) 1550 return -1; 1551 1552 selected_proto = proto; 1553 } else { 1554 type = psmouse_extensions(psmouse, psmouse_max_proto, true); 1555 selected_proto = psmouse_protocol_by_type(type); 1556 } 1557 1558 psmouse->protocol = selected_proto; 1559 1560 /* 1561 * If mouse's packet size is 3 there is no point in polling the 1562 * device in hopes to detect protocol reset - we won't get less 1563 * than 3 bytes response anyhow. 1564 */ 1565 if (psmouse->pktsize == 3) 1566 psmouse->resync_time = 0; 1567 1568 /* 1569 * Some smart KVMs fake response to POLL command returning just 1570 * 3 bytes and messing up our resync logic, so if initial poll 1571 * fails we won't try polling the device anymore. Hopefully 1572 * such KVM will maintain initially selected protocol. 1573 */ 1574 if (psmouse->resync_time && psmouse->poll(psmouse)) 1575 psmouse->resync_time = 0; 1576 1577 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1578 selected_proto->name, psmouse->vendor, psmouse->name); 1579 1580 input_dev->name = psmouse->devname; 1581 input_dev->phys = psmouse->phys; 1582 input_dev->id.bustype = BUS_I8042; 1583 input_dev->id.vendor = 0x0002; 1584 input_dev->id.product = psmouse->protocol->type; 1585 input_dev->id.version = psmouse->model; 1586 1587 return 0; 1588 } 1589 1590 /* 1591 * psmouse_connect() is a callback from the serio module when 1592 * an unhandled serio port is found. 1593 */ 1594 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1595 { 1596 struct psmouse *psmouse, *parent = NULL; 1597 struct input_dev *input_dev; 1598 int retval = 0, error = -ENOMEM; 1599 1600 mutex_lock(&psmouse_mutex); 1601 1602 /* 1603 * If this is a pass-through port deactivate parent so the device 1604 * connected to this port can be successfully identified 1605 */ 1606 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1607 parent = psmouse_from_serio(serio->parent); 1608 psmouse_deactivate(parent); 1609 } 1610 1611 psmouse = kzalloc(sizeof(*psmouse), GFP_KERNEL); 1612 input_dev = input_allocate_device(); 1613 if (!psmouse || !input_dev) 1614 goto err_free; 1615 1616 ps2_init(&psmouse->ps2dev, serio, 1617 psmouse_pre_receive_byte, psmouse_receive_byte); 1618 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1619 psmouse->dev = input_dev; 1620 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1621 1622 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1623 1624 error = serio_open(serio, drv); 1625 if (error) 1626 goto err_clear_drvdata; 1627 1628 /* give PT device some time to settle down before probing */ 1629 if (serio->id.type == SERIO_PS_PSTHRU) 1630 usleep_range(10000, 15000); 1631 1632 if (psmouse_probe(psmouse) < 0) { 1633 error = -ENODEV; 1634 goto err_close_serio; 1635 } 1636 1637 psmouse->rate = psmouse_rate; 1638 psmouse->resolution = psmouse_resolution; 1639 psmouse->resetafter = psmouse_resetafter; 1640 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1641 psmouse->smartscroll = psmouse_smartscroll; 1642 1643 psmouse_switch_protocol(psmouse, NULL); 1644 1645 if (!psmouse->protocol->smbus_companion) { 1646 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1647 psmouse_initialize(psmouse); 1648 1649 error = input_register_device(input_dev); 1650 if (error) 1651 goto err_protocol_disconnect; 1652 } else { 1653 /* Smbus companion will be reporting events, not us. */ 1654 input_free_device(input_dev); 1655 psmouse->dev = input_dev = NULL; 1656 } 1657 1658 if (parent && parent->pt_activate) 1659 parent->pt_activate(parent); 1660 1661 /* 1662 * PS/2 devices having SMBus companions should stay disabled 1663 * on PS/2 side, in order to have SMBus part operable. 1664 */ 1665 if (!psmouse->protocol->smbus_companion) 1666 psmouse_activate(psmouse); 1667 1668 out: 1669 /* If this is a pass-through port the parent needs to be re-activated */ 1670 if (parent) 1671 psmouse_activate(parent); 1672 1673 mutex_unlock(&psmouse_mutex); 1674 return retval; 1675 1676 err_protocol_disconnect: 1677 if (psmouse->disconnect) 1678 psmouse->disconnect(psmouse); 1679 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1680 err_close_serio: 1681 serio_close(serio); 1682 err_clear_drvdata: 1683 serio_set_drvdata(serio, NULL); 1684 err_free: 1685 input_free_device(input_dev); 1686 kfree(psmouse); 1687 1688 retval = error; 1689 goto out; 1690 } 1691 1692 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect) 1693 { 1694 struct psmouse *psmouse = psmouse_from_serio(serio); 1695 struct psmouse *parent = NULL; 1696 int (*reconnect_handler)(struct psmouse *); 1697 enum psmouse_type type; 1698 int rc = -1; 1699 1700 mutex_lock(&psmouse_mutex); 1701 1702 if (fast_reconnect) { 1703 reconnect_handler = psmouse->fast_reconnect; 1704 if (!reconnect_handler) { 1705 rc = -ENOENT; 1706 goto out_unlock; 1707 } 1708 } else { 1709 reconnect_handler = psmouse->reconnect; 1710 } 1711 1712 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1713 parent = psmouse_from_serio(serio->parent); 1714 psmouse_deactivate(parent); 1715 } 1716 1717 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1718 1719 if (reconnect_handler) { 1720 if (reconnect_handler(psmouse)) 1721 goto out; 1722 } else { 1723 psmouse_reset(psmouse); 1724 1725 if (psmouse_probe(psmouse) < 0) 1726 goto out; 1727 1728 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1729 if (psmouse->protocol->type != type) 1730 goto out; 1731 } 1732 1733 /* 1734 * OK, the device type (and capabilities) match the old one, 1735 * we can continue using it, complete initialization 1736 */ 1737 if (!psmouse->protocol->smbus_companion) { 1738 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1739 psmouse_initialize(psmouse); 1740 } 1741 1742 if (parent && parent->pt_activate) 1743 parent->pt_activate(parent); 1744 1745 /* 1746 * PS/2 devices having SMBus companions should stay disabled 1747 * on PS/2 side, in order to have SMBus part operable. 1748 */ 1749 if (!psmouse->protocol->smbus_companion) 1750 psmouse_activate(psmouse); 1751 1752 rc = 0; 1753 1754 out: 1755 /* If this is a pass-through port the parent waits to be activated */ 1756 if (parent) 1757 psmouse_activate(parent); 1758 1759 out_unlock: 1760 mutex_unlock(&psmouse_mutex); 1761 return rc; 1762 } 1763 1764 static int psmouse_reconnect(struct serio *serio) 1765 { 1766 return __psmouse_reconnect(serio, false); 1767 } 1768 1769 static int psmouse_fast_reconnect(struct serio *serio) 1770 { 1771 return __psmouse_reconnect(serio, true); 1772 } 1773 1774 static struct serio_device_id psmouse_serio_ids[] = { 1775 { 1776 .type = SERIO_8042, 1777 .proto = SERIO_ANY, 1778 .id = SERIO_ANY, 1779 .extra = SERIO_ANY, 1780 }, 1781 { 1782 .type = SERIO_PS_PSTHRU, 1783 .proto = SERIO_ANY, 1784 .id = SERIO_ANY, 1785 .extra = SERIO_ANY, 1786 }, 1787 { 0 } 1788 }; 1789 1790 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1791 1792 static struct serio_driver psmouse_drv = { 1793 .driver = { 1794 .name = "psmouse", 1795 .dev_groups = psmouse_dev_groups, 1796 }, 1797 .description = DRIVER_DESC, 1798 .id_table = psmouse_serio_ids, 1799 .interrupt = ps2_interrupt, 1800 .connect = psmouse_connect, 1801 .reconnect = psmouse_reconnect, 1802 .fast_reconnect = psmouse_fast_reconnect, 1803 .disconnect = psmouse_disconnect, 1804 .cleanup = psmouse_cleanup, 1805 }; 1806 1807 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1808 char *buf) 1809 { 1810 struct serio *serio = to_serio_port(dev); 1811 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1812 struct psmouse *psmouse = psmouse_from_serio(serio); 1813 1814 if (psmouse->protocol->smbus_companion && 1815 devattr != &psmouse_attr_protocol.dattr) 1816 return -ENOENT; 1817 1818 return attr->show(psmouse, attr->data, buf); 1819 } 1820 1821 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1822 const char *buf, size_t count) 1823 { 1824 struct serio *serio = to_serio_port(dev); 1825 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1826 struct psmouse *psmouse, *parent = NULL; 1827 int retval; 1828 1829 retval = mutex_lock_interruptible(&psmouse_mutex); 1830 if (retval) 1831 goto out; 1832 1833 psmouse = psmouse_from_serio(serio); 1834 1835 if (psmouse->protocol->smbus_companion && 1836 devattr != &psmouse_attr_protocol.dattr) { 1837 retval = -ENOENT; 1838 goto out_unlock; 1839 } 1840 1841 if (attr->protect) { 1842 if (psmouse->state == PSMOUSE_IGNORE) { 1843 retval = -ENODEV; 1844 goto out_unlock; 1845 } 1846 1847 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1848 parent = psmouse_from_serio(serio->parent); 1849 psmouse_deactivate(parent); 1850 } 1851 1852 if (!psmouse->protocol->smbus_companion) 1853 psmouse_deactivate(psmouse); 1854 } 1855 1856 retval = attr->set(psmouse, attr->data, buf, count); 1857 1858 if (attr->protect) { 1859 if (retval != -ENODEV && !psmouse->protocol->smbus_companion) 1860 psmouse_activate(psmouse); 1861 1862 if (parent) 1863 psmouse_activate(parent); 1864 } 1865 1866 out_unlock: 1867 mutex_unlock(&psmouse_mutex); 1868 out: 1869 return retval; 1870 } 1871 1872 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1873 { 1874 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1875 1876 return sprintf(buf, "%u\n", *field); 1877 } 1878 1879 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1880 { 1881 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1882 unsigned int value; 1883 int err; 1884 1885 err = kstrtouint(buf, 10, &value); 1886 if (err) 1887 return err; 1888 1889 *field = value; 1890 1891 return count; 1892 } 1893 1894 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1895 { 1896 return sprintf(buf, "%s\n", psmouse->protocol->name); 1897 } 1898 1899 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1900 { 1901 struct serio *serio = psmouse->ps2dev.serio; 1902 struct psmouse *parent = NULL; 1903 struct input_dev *old_dev, *new_dev; 1904 const struct psmouse_protocol *proto, *old_proto; 1905 int error; 1906 int retry = 0; 1907 1908 proto = psmouse_protocol_by_name(buf, count); 1909 if (!proto) 1910 return -EINVAL; 1911 1912 if (psmouse->protocol == proto) 1913 return count; 1914 1915 new_dev = input_allocate_device(); 1916 if (!new_dev) 1917 return -ENOMEM; 1918 1919 while (!list_empty(&serio->children)) { 1920 if (++retry > 3) { 1921 psmouse_warn(psmouse, 1922 "failed to destroy children ports, protocol change aborted.\n"); 1923 input_free_device(new_dev); 1924 return -EIO; 1925 } 1926 1927 mutex_unlock(&psmouse_mutex); 1928 serio_unregister_child_port(serio); 1929 mutex_lock(&psmouse_mutex); 1930 1931 if (serio->drv != &psmouse_drv) { 1932 input_free_device(new_dev); 1933 return -ENODEV; 1934 } 1935 1936 if (psmouse->protocol == proto) { 1937 input_free_device(new_dev); 1938 return count; /* switched by other thread */ 1939 } 1940 } 1941 1942 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1943 parent = psmouse_from_serio(serio->parent); 1944 if (parent->pt_deactivate) 1945 parent->pt_deactivate(parent); 1946 } 1947 1948 old_dev = psmouse->dev; 1949 old_proto = psmouse->protocol; 1950 1951 if (psmouse->disconnect) 1952 psmouse->disconnect(psmouse); 1953 1954 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1955 1956 psmouse->dev = new_dev; 1957 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1958 1959 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1960 psmouse_reset(psmouse); 1961 /* default to PSMOUSE_PS2 */ 1962 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1963 } 1964 1965 psmouse_initialize(psmouse); 1966 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1967 1968 if (psmouse->protocol->smbus_companion) { 1969 input_free_device(psmouse->dev); 1970 psmouse->dev = NULL; 1971 } else { 1972 error = input_register_device(psmouse->dev); 1973 if (error) { 1974 if (psmouse->disconnect) 1975 psmouse->disconnect(psmouse); 1976 1977 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1978 input_free_device(new_dev); 1979 psmouse->dev = old_dev; 1980 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1981 psmouse_switch_protocol(psmouse, old_proto); 1982 psmouse_initialize(psmouse); 1983 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1984 1985 return error; 1986 } 1987 } 1988 1989 if (old_dev) 1990 input_unregister_device(old_dev); 1991 1992 if (parent && parent->pt_activate) 1993 parent->pt_activate(parent); 1994 1995 return count; 1996 } 1997 1998 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1999 { 2000 unsigned int value; 2001 int err; 2002 2003 err = kstrtouint(buf, 10, &value); 2004 if (err) 2005 return err; 2006 2007 psmouse->set_rate(psmouse, value); 2008 return count; 2009 } 2010 2011 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 2012 { 2013 unsigned int value; 2014 int err; 2015 2016 err = kstrtouint(buf, 10, &value); 2017 if (err) 2018 return err; 2019 2020 psmouse->set_resolution(psmouse, value); 2021 return count; 2022 } 2023 2024 2025 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 2026 { 2027 const struct psmouse_protocol *proto; 2028 2029 if (!val) 2030 return -EINVAL; 2031 2032 proto = psmouse_protocol_by_name(val, strlen(val)); 2033 2034 if (!proto || !proto->maxproto) 2035 return -EINVAL; 2036 2037 *((unsigned int *)kp->arg) = proto->type; 2038 2039 return 0; 2040 } 2041 2042 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 2043 { 2044 int type = *((unsigned int *)kp->arg); 2045 2046 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); 2047 } 2048 2049 static int __init psmouse_init(void) 2050 { 2051 int err; 2052 2053 lifebook_module_init(); 2054 synaptics_module_init(); 2055 hgpk_module_init(); 2056 2057 err = psmouse_smbus_module_init(); 2058 if (err) 2059 return err; 2060 2061 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); 2062 if (!kpsmoused_wq) { 2063 pr_err("failed to create kpsmoused workqueue\n"); 2064 err = -ENOMEM; 2065 goto err_smbus_exit; 2066 } 2067 2068 err = serio_register_driver(&psmouse_drv); 2069 if (err) 2070 goto err_destroy_wq; 2071 2072 return 0; 2073 2074 err_destroy_wq: 2075 destroy_workqueue(kpsmoused_wq); 2076 err_smbus_exit: 2077 psmouse_smbus_module_exit(); 2078 return err; 2079 } 2080 2081 static void __exit psmouse_exit(void) 2082 { 2083 serio_unregister_driver(&psmouse_drv); 2084 destroy_workqueue(kpsmoused_wq); 2085 psmouse_smbus_module_exit(); 2086 } 2087 2088 module_init(psmouse_init); 2089 module_exit(psmouse_exit); 2090