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