1 /* 2 * PS/2 mouse driver 3 * 4 * Copyright (c) 1999-2002 Vojtech Pavlik 5 * Copyright (c) 2003-2004 Dmitry Torokhov 6 */ 7 8 /* 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License version 2 as published by 11 * the Free Software Foundation. 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 #define psmouse_fmt(fmt) fmt 16 17 #include <linux/delay.h> 18 #include <linux/module.h> 19 #include <linux/slab.h> 20 #include <linux/interrupt.h> 21 #include <linux/input.h> 22 #include <linux/serio.h> 23 #include <linux/init.h> 24 #include <linux/libps2.h> 25 #include <linux/mutex.h> 26 27 #include "psmouse.h" 28 #include "synaptics.h" 29 #include "logips2pp.h" 30 #include "alps.h" 31 #include "hgpk.h" 32 #include "lifebook.h" 33 #include "trackpoint.h" 34 #include "touchkit_ps2.h" 35 #include "elantech.h" 36 #include "sentelic.h" 37 #include "cypress_ps2.h" 38 #include "focaltech.h" 39 #include "vmmouse.h" 40 #include "byd.h" 41 42 #define DRIVER_DESC "PS/2 mouse driver" 43 44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); 45 MODULE_DESCRIPTION(DRIVER_DESC); 46 MODULE_LICENSE("GPL"); 47 48 static unsigned int psmouse_max_proto = PSMOUSE_AUTO; 49 static int psmouse_set_maxproto(const char *val, const struct kernel_param *); 50 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); 51 static const struct kernel_param_ops param_ops_proto_abbrev = { 52 .set = psmouse_set_maxproto, 53 .get = psmouse_get_maxproto, 54 }; 55 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) 56 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); 57 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); 58 59 static unsigned int psmouse_resolution = 200; 60 module_param_named(resolution, psmouse_resolution, uint, 0644); 61 MODULE_PARM_DESC(resolution, "Resolution, in dpi."); 62 63 static unsigned int psmouse_rate = 100; 64 module_param_named(rate, psmouse_rate, uint, 0644); 65 MODULE_PARM_DESC(rate, "Report rate, in reports per second."); 66 67 static bool psmouse_smartscroll = true; 68 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); 69 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); 70 71 static unsigned int psmouse_resetafter = 5; 72 module_param_named(resetafter, psmouse_resetafter, uint, 0644); 73 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); 74 75 static unsigned int psmouse_resync_time; 76 module_param_named(resync_time, psmouse_resync_time, uint, 0644); 77 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); 78 79 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, 80 NULL, 81 psmouse_attr_show_protocol, psmouse_attr_set_protocol); 82 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, 83 (void *) offsetof(struct psmouse, rate), 84 psmouse_show_int_attr, psmouse_attr_set_rate); 85 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, 86 (void *) offsetof(struct psmouse, resolution), 87 psmouse_show_int_attr, psmouse_attr_set_resolution); 88 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, 89 (void *) offsetof(struct psmouse, resetafter), 90 psmouse_show_int_attr, psmouse_set_int_attr); 91 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, 92 (void *) offsetof(struct psmouse, resync_time), 93 psmouse_show_int_attr, psmouse_set_int_attr); 94 95 static struct attribute *psmouse_attributes[] = { 96 &psmouse_attr_protocol.dattr.attr, 97 &psmouse_attr_rate.dattr.attr, 98 &psmouse_attr_resolution.dattr.attr, 99 &psmouse_attr_resetafter.dattr.attr, 100 &psmouse_attr_resync_time.dattr.attr, 101 NULL 102 }; 103 104 static const struct attribute_group psmouse_attribute_group = { 105 .attrs = psmouse_attributes, 106 }; 107 108 /* 109 * psmouse_mutex protects all operations changing state of mouse 110 * (connecting, disconnecting, changing rate or resolution via 111 * sysfs). We could use a per-device semaphore but since there 112 * rarely more than one PS/2 mouse connected and since semaphore 113 * is taken in "slow" paths it is not worth it. 114 */ 115 static DEFINE_MUTEX(psmouse_mutex); 116 117 static struct workqueue_struct *kpsmoused_wq; 118 119 static void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons) 120 { 121 input_report_key(dev, BTN_LEFT, buttons & BIT(0)); 122 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2)); 123 input_report_key(dev, BTN_RIGHT, buttons & BIT(1)); 124 } 125 126 /* 127 * psmouse_process_byte() analyzes the PS/2 data stream and reports 128 * relevant events to the input module once full packet has arrived. 129 */ 130 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) 131 { 132 struct input_dev *dev = psmouse->dev; 133 unsigned char *packet = psmouse->packet; 134 135 if (psmouse->pktcnt < psmouse->pktsize) 136 return PSMOUSE_GOOD_DATA; 137 138 /* Full packet accumulated, process it */ 139 140 switch (psmouse->protocol->type) { 141 case PSMOUSE_IMPS: 142 /* IntelliMouse has scroll wheel */ 143 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 144 break; 145 146 case PSMOUSE_IMEX: 147 /* Scroll wheel and buttons on IntelliMouse Explorer */ 148 switch (packet[3] & 0xC0) { 149 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ 150 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 151 break; 152 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ 153 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); 154 break; 155 case 0x00: 156 case 0xC0: 157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); 158 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); 159 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); 160 break; 161 } 162 break; 163 164 case PSMOUSE_GENPS: 165 /* Report scroll buttons on NetMice */ 166 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); 167 168 /* Extra buttons on Genius NewNet 3D */ 169 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); 170 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); 171 break; 172 173 case PSMOUSE_THINKPS: 174 /* Extra button on ThinkingMouse */ 175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); 176 177 /* 178 * Without this bit of weirdness moving up gives wildly 179 * high Y changes. 180 */ 181 packet[1] |= (packet[0] & 0x40) << 1; 182 break; 183 184 case PSMOUSE_CORTRON: 185 /* 186 * Cortron PS2 Trackball reports SIDE button in the 187 * 4th bit of the first byte. 188 */ 189 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); 190 packet[0] |= 0x08; 191 break; 192 193 default: 194 break; 195 } 196 197 /* Generic PS/2 Mouse */ 198 psmouse_report_standard_buttons(dev, 199 packet[0] | psmouse->extra_buttons); 200 201 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); 202 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); 203 204 input_sync(dev); 205 206 return PSMOUSE_FULL_PACKET; 207 } 208 209 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, 210 unsigned long delay) 211 { 212 queue_delayed_work(kpsmoused_wq, work, delay); 213 } 214 215 /* 216 * __psmouse_set_state() sets new psmouse state and resets all flags. 217 */ 218 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 219 { 220 psmouse->state = new_state; 221 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; 222 psmouse->ps2dev.flags = 0; 223 psmouse->last = jiffies; 224 } 225 226 /* 227 * psmouse_set_state() sets new psmouse state and resets all flags and 228 * counters while holding serio lock so fighting with interrupt handler 229 * is not a concern. 230 */ 231 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) 232 { 233 serio_pause_rx(psmouse->ps2dev.serio); 234 __psmouse_set_state(psmouse, new_state); 235 serio_continue_rx(psmouse->ps2dev.serio); 236 } 237 238 /* 239 * psmouse_handle_byte() processes one byte of the input data stream 240 * by calling corresponding protocol handler. 241 */ 242 static int psmouse_handle_byte(struct psmouse *psmouse) 243 { 244 psmouse_ret_t rc = psmouse->protocol_handler(psmouse); 245 246 switch (rc) { 247 case PSMOUSE_BAD_DATA: 248 if (psmouse->state == PSMOUSE_ACTIVATED) { 249 psmouse_warn(psmouse, 250 "%s at %s lost sync at byte %d\n", 251 psmouse->name, psmouse->phys, 252 psmouse->pktcnt); 253 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { 254 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 255 psmouse_notice(psmouse, 256 "issuing reconnect request\n"); 257 serio_reconnect(psmouse->ps2dev.serio); 258 return -1; 259 } 260 } 261 psmouse->pktcnt = 0; 262 break; 263 264 case PSMOUSE_FULL_PACKET: 265 psmouse->pktcnt = 0; 266 if (psmouse->out_of_sync_cnt) { 267 psmouse->out_of_sync_cnt = 0; 268 psmouse_notice(psmouse, 269 "%s at %s - driver resynced.\n", 270 psmouse->name, psmouse->phys); 271 } 272 break; 273 274 case PSMOUSE_GOOD_DATA: 275 break; 276 } 277 return 0; 278 } 279 280 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data) 281 { 282 switch (psmouse->oob_data_type) { 283 case PSMOUSE_OOB_NONE: 284 psmouse->oob_data_type = data; 285 break; 286 287 case PSMOUSE_OOB_EXTRA_BTNS: 288 psmouse_report_standard_buttons(psmouse->dev, data); 289 input_sync(psmouse->dev); 290 291 psmouse->extra_buttons = data; 292 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 293 break; 294 295 default: 296 psmouse_warn(psmouse, 297 "unknown OOB_DATA type: 0x%02x\n", 298 psmouse->oob_data_type); 299 psmouse->oob_data_type = PSMOUSE_OOB_NONE; 300 break; 301 } 302 } 303 304 /* 305 * psmouse_interrupt() handles incoming characters, either passing them 306 * for normal processing or gathering them as command response. 307 */ 308 static irqreturn_t psmouse_interrupt(struct serio *serio, 309 unsigned char data, unsigned int flags) 310 { 311 struct psmouse *psmouse = serio_get_drvdata(serio); 312 313 if (psmouse->state == PSMOUSE_IGNORE) 314 goto out; 315 316 if (unlikely((flags & SERIO_TIMEOUT) || 317 ((flags & SERIO_PARITY) && 318 !psmouse->protocol->ignore_parity))) { 319 320 if (psmouse->state == PSMOUSE_ACTIVATED) 321 psmouse_warn(psmouse, 322 "bad data from KBC -%s%s\n", 323 flags & SERIO_TIMEOUT ? " timeout" : "", 324 flags & SERIO_PARITY ? " bad parity" : ""); 325 ps2_cmd_aborted(&psmouse->ps2dev); 326 goto out; 327 } 328 329 if (flags & SERIO_OOB_DATA) { 330 psmouse_handle_oob_data(psmouse, data); 331 goto out; 332 } 333 334 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) 335 if (ps2_handle_ack(&psmouse->ps2dev, data)) 336 goto out; 337 338 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) 339 if (ps2_handle_response(&psmouse->ps2dev, data)) 340 goto out; 341 342 if (psmouse->state <= PSMOUSE_RESYNCING) 343 goto out; 344 345 if (psmouse->state == PSMOUSE_ACTIVATED && 346 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { 347 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n", 348 psmouse->name, psmouse->phys, psmouse->pktcnt); 349 psmouse->badbyte = psmouse->packet[0]; 350 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 351 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 352 goto out; 353 } 354 355 psmouse->packet[psmouse->pktcnt++] = data; 356 357 /* Check if this is a new device announcement (0xAA 0x00) */ 358 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { 359 if (psmouse->pktcnt == 1) { 360 psmouse->last = jiffies; 361 goto out; 362 } 363 364 if (psmouse->packet[1] == PSMOUSE_RET_ID || 365 (psmouse->protocol->type == PSMOUSE_HGPK && 366 psmouse->packet[1] == PSMOUSE_RET_BAT)) { 367 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 368 serio_reconnect(serio); 369 goto out; 370 } 371 372 /* Not a new device, try processing first byte normally */ 373 psmouse->pktcnt = 1; 374 if (psmouse_handle_byte(psmouse)) 375 goto out; 376 377 psmouse->packet[psmouse->pktcnt++] = data; 378 } 379 380 /* 381 * See if we need to force resync because mouse was idle for 382 * too long. 383 */ 384 if (psmouse->state == PSMOUSE_ACTIVATED && 385 psmouse->pktcnt == 1 && psmouse->resync_time && 386 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { 387 psmouse->badbyte = psmouse->packet[0]; 388 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 389 psmouse_queue_work(psmouse, &psmouse->resync_work, 0); 390 goto out; 391 } 392 393 psmouse->last = jiffies; 394 psmouse_handle_byte(psmouse); 395 396 out: 397 return IRQ_HANDLED; 398 } 399 400 /* 401 * psmouse_sliced_command() sends an extended PS/2 command to the mouse 402 * using sliced syntax, understood by advanced devices, such as Logitech 403 * or Synaptics touchpads. The command is encoded as: 404 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu 405 * is the command. 406 */ 407 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) 408 { 409 int i; 410 411 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) 412 return -1; 413 414 for (i = 6; i >= 0; i -= 2) { 415 unsigned char d = (command >> i) & 3; 416 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) 417 return -1; 418 } 419 420 return 0; 421 } 422 423 /* 424 * psmouse_reset() resets the mouse into power-on state. 425 */ 426 int psmouse_reset(struct psmouse *psmouse) 427 { 428 unsigned char param[2]; 429 430 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) 431 return -1; 432 433 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) 434 return -1; 435 436 return 0; 437 } 438 439 /* 440 * Here we set the mouse resolution. 441 */ 442 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) 443 { 444 static const unsigned char params[] = { 0, 1, 2, 2, 3 }; 445 unsigned char p; 446 447 if (resolution == 0 || resolution > 200) 448 resolution = 200; 449 450 p = params[resolution / 50]; 451 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); 452 psmouse->resolution = 25 << p; 453 } 454 455 /* 456 * Here we set the mouse report rate. 457 */ 458 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) 459 { 460 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; 461 unsigned char r; 462 int i = 0; 463 464 while (rates[i] > rate) i++; 465 r = rates[i]; 466 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); 467 psmouse->rate = r; 468 } 469 470 /* 471 * Here we set the mouse scaling. 472 */ 473 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale) 474 { 475 ps2_command(&psmouse->ps2dev, NULL, 476 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 : 477 PSMOUSE_CMD_SETSCALE11); 478 } 479 480 /* 481 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it. 482 */ 483 static int psmouse_poll(struct psmouse *psmouse) 484 { 485 return ps2_command(&psmouse->ps2dev, psmouse->packet, 486 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); 487 } 488 489 static bool psmouse_check_pnp_id(const char *id, const char * const ids[]) 490 { 491 int i; 492 493 for (i = 0; ids[i]; i++) 494 if (!strcasecmp(id, ids[i])) 495 return true; 496 497 return false; 498 } 499 500 /* 501 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids. 502 */ 503 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[]) 504 { 505 struct serio *serio = psmouse->ps2dev.serio; 506 char *p, *fw_id_copy, *save_ptr; 507 bool found = false; 508 509 if (strncmp(serio->firmware_id, "PNP: ", 5)) 510 return false; 511 512 fw_id_copy = kstrndup(&serio->firmware_id[5], 513 sizeof(serio->firmware_id) - 5, 514 GFP_KERNEL); 515 if (!fw_id_copy) 516 return false; 517 518 save_ptr = fw_id_copy; 519 while ((p = strsep(&fw_id_copy, " ")) != NULL) { 520 if (psmouse_check_pnp_id(p, ids)) { 521 found = true; 522 break; 523 } 524 } 525 526 kfree(save_ptr); 527 return found; 528 } 529 530 /* 531 * Genius NetMouse magic init. 532 */ 533 static int genius_detect(struct psmouse *psmouse, bool set_properties) 534 { 535 struct ps2dev *ps2dev = &psmouse->ps2dev; 536 unsigned char param[4]; 537 538 param[0] = 3; 539 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 540 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 541 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 542 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); 543 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 544 545 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) 546 return -1; 547 548 if (set_properties) { 549 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 550 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 551 __set_bit(BTN_SIDE, psmouse->dev->keybit); 552 __set_bit(REL_WHEEL, psmouse->dev->relbit); 553 554 psmouse->vendor = "Genius"; 555 psmouse->name = "Mouse"; 556 psmouse->pktsize = 4; 557 } 558 559 return 0; 560 } 561 562 /* 563 * IntelliMouse magic init. 564 */ 565 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) 566 { 567 struct ps2dev *ps2dev = &psmouse->ps2dev; 568 unsigned char param[2]; 569 570 param[0] = 200; 571 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 572 param[0] = 100; 573 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 574 param[0] = 80; 575 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 576 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 577 578 if (param[0] != 3) 579 return -1; 580 581 if (set_properties) { 582 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 583 __set_bit(REL_WHEEL, psmouse->dev->relbit); 584 585 if (!psmouse->vendor) 586 psmouse->vendor = "Generic"; 587 if (!psmouse->name) 588 psmouse->name = "Wheel Mouse"; 589 psmouse->pktsize = 4; 590 } 591 592 return 0; 593 } 594 595 /* 596 * Try IntelliMouse/Explorer magic init. 597 */ 598 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) 599 { 600 struct ps2dev *ps2dev = &psmouse->ps2dev; 601 unsigned char param[2]; 602 603 intellimouse_detect(psmouse, 0); 604 605 param[0] = 200; 606 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 607 param[0] = 200; 608 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 609 param[0] = 80; 610 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 611 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 612 613 if (param[0] != 4) 614 return -1; 615 616 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ 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 param[0] = 40; 622 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 623 624 if (set_properties) { 625 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 626 __set_bit(REL_WHEEL, psmouse->dev->relbit); 627 __set_bit(REL_HWHEEL, psmouse->dev->relbit); 628 __set_bit(BTN_SIDE, psmouse->dev->keybit); 629 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 630 631 if (!psmouse->vendor) 632 psmouse->vendor = "Generic"; 633 if (!psmouse->name) 634 psmouse->name = "Explorer Mouse"; 635 psmouse->pktsize = 4; 636 } 637 638 return 0; 639 } 640 641 /* 642 * Kensington ThinkingMouse / ExpertMouse magic init. 643 */ 644 static int thinking_detect(struct psmouse *psmouse, bool set_properties) 645 { 646 struct ps2dev *ps2dev = &psmouse->ps2dev; 647 unsigned char param[2]; 648 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; 649 int i; 650 651 param[0] = 10; 652 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 653 param[0] = 0; 654 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 655 for (i = 0; i < ARRAY_SIZE(seq); i++) { 656 param[0] = seq[i]; 657 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); 658 } 659 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); 660 661 if (param[0] != 2) 662 return -1; 663 664 if (set_properties) { 665 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 666 __set_bit(BTN_EXTRA, psmouse->dev->keybit); 667 668 psmouse->vendor = "Kensington"; 669 psmouse->name = "ThinkingMouse"; 670 } 671 672 return 0; 673 } 674 675 /* 676 * Bare PS/2 protocol "detection". Always succeeds. 677 */ 678 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) 679 { 680 if (set_properties) { 681 if (!psmouse->vendor) 682 psmouse->vendor = "Generic"; 683 if (!psmouse->name) 684 psmouse->name = "Mouse"; 685 686 /* 687 * We have no way of figuring true number of buttons so let's 688 * assume that the device has 3. 689 */ 690 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 691 } 692 693 return 0; 694 } 695 696 /* 697 * Cortron PS/2 protocol detection. There's no special way to detect it, so it 698 * must be forced by sysfs protocol writing. 699 */ 700 static int cortron_detect(struct psmouse *psmouse, bool set_properties) 701 { 702 if (set_properties) { 703 psmouse->vendor = "Cortron"; 704 psmouse->name = "PS/2 Trackball"; 705 706 __set_bit(BTN_MIDDLE, psmouse->dev->keybit); 707 __set_bit(BTN_SIDE, psmouse->dev->keybit); 708 } 709 710 return 0; 711 } 712 713 static const struct psmouse_protocol psmouse_protocols[] = { 714 { 715 .type = PSMOUSE_PS2, 716 .name = "PS/2", 717 .alias = "bare", 718 .maxproto = true, 719 .ignore_parity = true, 720 .detect = ps2bare_detect, 721 .try_passthru = true, 722 }, 723 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP 724 { 725 .type = PSMOUSE_PS2PP, 726 .name = "PS2++", 727 .alias = "logitech", 728 .detect = ps2pp_detect, 729 }, 730 #endif 731 { 732 .type = PSMOUSE_THINKPS, 733 .name = "ThinkPS/2", 734 .alias = "thinkps", 735 .detect = thinking_detect, 736 }, 737 #ifdef CONFIG_MOUSE_PS2_CYPRESS 738 { 739 .type = PSMOUSE_CYPRESS, 740 .name = "CyPS/2", 741 .alias = "cypress", 742 .detect = cypress_detect, 743 .init = cypress_init, 744 }, 745 #endif 746 { 747 .type = PSMOUSE_GENPS, 748 .name = "GenPS/2", 749 .alias = "genius", 750 .detect = genius_detect, 751 }, 752 { 753 .type = PSMOUSE_IMPS, 754 .name = "ImPS/2", 755 .alias = "imps", 756 .maxproto = true, 757 .ignore_parity = true, 758 .detect = intellimouse_detect, 759 .try_passthru = true, 760 }, 761 { 762 .type = PSMOUSE_IMEX, 763 .name = "ImExPS/2", 764 .alias = "exps", 765 .maxproto = true, 766 .ignore_parity = true, 767 .detect = im_explorer_detect, 768 .try_passthru = true, 769 }, 770 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 771 { 772 .type = PSMOUSE_SYNAPTICS, 773 .name = "SynPS/2", 774 .alias = "synaptics", 775 .detect = synaptics_detect, 776 .init = synaptics_init_absolute, 777 }, 778 { 779 .type = PSMOUSE_SYNAPTICS_RELATIVE, 780 .name = "SynRelPS/2", 781 .alias = "synaptics-relative", 782 .detect = synaptics_detect, 783 .init = synaptics_init_relative, 784 }, 785 #endif 786 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 787 { 788 .type = PSMOUSE_SYNAPTICS_SMBUS, 789 .name = "SynSMBus", 790 .alias = "synaptics-smbus", 791 .detect = synaptics_detect, 792 .init = synaptics_init_smbus, 793 .smbus_companion = true, 794 }, 795 #endif 796 #ifdef CONFIG_MOUSE_PS2_ALPS 797 { 798 .type = PSMOUSE_ALPS, 799 .name = "AlpsPS/2", 800 .alias = "alps", 801 .detect = alps_detect, 802 .init = alps_init, 803 }, 804 #endif 805 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK 806 { 807 .type = PSMOUSE_LIFEBOOK, 808 .name = "LBPS/2", 809 .alias = "lifebook", 810 .detect = lifebook_detect, 811 .init = lifebook_init, 812 }, 813 #endif 814 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT 815 { 816 .type = PSMOUSE_TRACKPOINT, 817 .name = "TPPS/2", 818 .alias = "trackpoint", 819 .detect = trackpoint_detect, 820 .try_passthru = true, 821 }, 822 #endif 823 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT 824 { 825 .type = PSMOUSE_TOUCHKIT_PS2, 826 .name = "touchkitPS/2", 827 .alias = "touchkit", 828 .detect = touchkit_ps2_detect, 829 }, 830 #endif 831 #ifdef CONFIG_MOUSE_PS2_OLPC 832 { 833 .type = PSMOUSE_HGPK, 834 .name = "OLPC HGPK", 835 .alias = "hgpk", 836 .detect = hgpk_detect, 837 }, 838 #endif 839 #ifdef CONFIG_MOUSE_PS2_ELANTECH 840 { 841 .type = PSMOUSE_ELANTECH, 842 .name = "ETPS/2", 843 .alias = "elantech", 844 .detect = elantech_detect, 845 .init = elantech_init, 846 }, 847 #endif 848 #ifdef CONFIG_MOUSE_PS2_SENTELIC 849 { 850 .type = PSMOUSE_FSP, 851 .name = "FSPPS/2", 852 .alias = "fsp", 853 .detect = fsp_detect, 854 .init = fsp_init, 855 }, 856 #endif 857 { 858 .type = PSMOUSE_CORTRON, 859 .name = "CortronPS/2", 860 .alias = "cortps", 861 .detect = cortron_detect, 862 }, 863 #ifdef CONFIG_MOUSE_PS2_FOCALTECH 864 { 865 .type = PSMOUSE_FOCALTECH, 866 .name = "FocalTechPS/2", 867 .alias = "focaltech", 868 .detect = focaltech_detect, 869 .init = focaltech_init, 870 }, 871 #endif 872 #ifdef CONFIG_MOUSE_PS2_VMMOUSE 873 { 874 .type = PSMOUSE_VMMOUSE, 875 .name = VMMOUSE_PSNAME, 876 .alias = "vmmouse", 877 .detect = vmmouse_detect, 878 .init = vmmouse_init, 879 }, 880 #endif 881 #ifdef CONFIG_MOUSE_PS2_BYD 882 { 883 .type = PSMOUSE_BYD, 884 .name = "BYDPS/2", 885 .alias = "byd", 886 .detect = byd_detect, 887 .init = byd_init, 888 }, 889 #endif 890 { 891 .type = PSMOUSE_AUTO, 892 .name = "auto", 893 .alias = "any", 894 .maxproto = true, 895 }, 896 }; 897 898 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type) 899 { 900 int i; 901 902 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) 903 if (psmouse_protocols[i].type == type) 904 return &psmouse_protocols[i]; 905 906 return NULL; 907 } 908 909 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) 910 { 911 const struct psmouse_protocol *proto; 912 913 proto = __psmouse_protocol_by_type(type); 914 if (proto) 915 return proto; 916 917 WARN_ON(1); 918 return &psmouse_protocols[0]; 919 } 920 921 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) 922 { 923 const struct psmouse_protocol *p; 924 int i; 925 926 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { 927 p = &psmouse_protocols[i]; 928 929 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || 930 (strlen(p->alias) == len && !strncmp(p->alias, name, len))) 931 return &psmouse_protocols[i]; 932 } 933 934 return NULL; 935 } 936 937 /* 938 * Apply default settings to the psmouse structure. Most of them will 939 * be overridden by individual protocol initialization routines. 940 */ 941 static void psmouse_apply_defaults(struct psmouse *psmouse) 942 { 943 struct input_dev *input_dev = psmouse->dev; 944 945 memset(input_dev->evbit, 0, sizeof(input_dev->evbit)); 946 memset(input_dev->keybit, 0, sizeof(input_dev->keybit)); 947 memset(input_dev->relbit, 0, sizeof(input_dev->relbit)); 948 memset(input_dev->absbit, 0, sizeof(input_dev->absbit)); 949 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit)); 950 951 __set_bit(EV_KEY, input_dev->evbit); 952 __set_bit(EV_REL, input_dev->evbit); 953 954 __set_bit(BTN_LEFT, input_dev->keybit); 955 __set_bit(BTN_RIGHT, input_dev->keybit); 956 957 __set_bit(REL_X, input_dev->relbit); 958 __set_bit(REL_Y, input_dev->relbit); 959 960 __set_bit(INPUT_PROP_POINTER, input_dev->propbit); 961 962 psmouse->protocol = &psmouse_protocols[0]; 963 964 psmouse->set_rate = psmouse_set_rate; 965 psmouse->set_resolution = psmouse_set_resolution; 966 psmouse->set_scale = psmouse_set_scale; 967 psmouse->poll = psmouse_poll; 968 psmouse->protocol_handler = psmouse_process_byte; 969 psmouse->pktsize = 3; 970 psmouse->reconnect = NULL; 971 psmouse->fast_reconnect = NULL; 972 psmouse->disconnect = NULL; 973 psmouse->cleanup = NULL; 974 psmouse->pt_activate = NULL; 975 psmouse->pt_deactivate = NULL; 976 } 977 978 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool), 979 struct psmouse *psmouse, bool allow_passthrough, 980 bool set_properties) 981 { 982 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 983 !allow_passthrough) { 984 return false; 985 } 986 987 if (set_properties) 988 psmouse_apply_defaults(psmouse); 989 990 return detect(psmouse, set_properties) == 0; 991 } 992 993 static bool psmouse_try_protocol(struct psmouse *psmouse, 994 enum psmouse_type type, 995 unsigned int *max_proto, 996 bool set_properties, bool init_allowed) 997 { 998 const struct psmouse_protocol *proto; 999 1000 proto = __psmouse_protocol_by_type(type); 1001 if (!proto) 1002 return false; 1003 1004 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru, 1005 set_properties)) 1006 return false; 1007 1008 if (set_properties && proto->init && init_allowed) { 1009 if (proto->init(psmouse) != 0) { 1010 /* 1011 * We detected device, but init failed. Adjust 1012 * max_proto so we only try standard protocols. 1013 */ 1014 if (*max_proto > PSMOUSE_IMEX) 1015 *max_proto = PSMOUSE_IMEX; 1016 1017 return false; 1018 } 1019 } 1020 1021 return true; 1022 } 1023 1024 /* 1025 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 1026 * the mouse may have. 1027 */ 1028 static int psmouse_extensions(struct psmouse *psmouse, 1029 unsigned int max_proto, bool set_properties) 1030 { 1031 bool synaptics_hardware = false; 1032 int ret; 1033 1034 /* 1035 * Always check for focaltech, this is safe as it uses pnp-id 1036 * matching. 1037 */ 1038 if (psmouse_do_detect(focaltech_detect, 1039 psmouse, false, set_properties)) { 1040 if (max_proto > PSMOUSE_IMEX && 1041 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 1042 (!set_properties || focaltech_init(psmouse) == 0)) { 1043 return PSMOUSE_FOCALTECH; 1044 } 1045 /* 1046 * Restrict psmouse_max_proto so that psmouse_initialize() 1047 * does not try to reset rate and resolution, because even 1048 * that upsets the device. 1049 * This also causes us to basically fall through to basic 1050 * protocol detection, where we fully reset the mouse, 1051 * and set it up as bare PS/2 protocol device. 1052 */ 1053 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1054 } 1055 1056 /* 1057 * We always check for LifeBook because it does not disturb mouse 1058 * (it only checks DMI information). 1059 */ 1060 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1061 set_properties, max_proto > PSMOUSE_IMEX)) 1062 return PSMOUSE_LIFEBOOK; 1063 1064 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1065 set_properties, max_proto > PSMOUSE_IMEX)) 1066 return PSMOUSE_VMMOUSE; 1067 1068 /* 1069 * Try Kensington ThinkingMouse (we try first, because Synaptics 1070 * probe upsets the ThinkingMouse). 1071 */ 1072 if (max_proto > PSMOUSE_IMEX && 1073 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1074 set_properties, true)) { 1075 return PSMOUSE_THINKPS; 1076 } 1077 1078 /* 1079 * Try Synaptics TouchPad. Note that probing is done even if 1080 * Synaptics protocol support is disabled in config - we need to 1081 * know if it is Synaptics so we can reset it properly after 1082 * probing for IntelliMouse. 1083 */ 1084 if (max_proto > PSMOUSE_PS2 && 1085 psmouse_do_detect(synaptics_detect, 1086 psmouse, false, set_properties)) { 1087 synaptics_hardware = true; 1088 1089 if (max_proto > PSMOUSE_IMEX) { 1090 /* 1091 * Try activating protocol, but check if support is 1092 * enabled first, since we try detecting Synaptics 1093 * even when protocol is disabled. 1094 */ 1095 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || 1096 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { 1097 if (!set_properties) 1098 return PSMOUSE_SYNAPTICS; 1099 1100 ret = synaptics_init(psmouse); 1101 if (ret >= 0) 1102 return ret; 1103 } 1104 1105 /* 1106 * Some Synaptics touchpads can emulate extended 1107 * protocols (like IMPS/2). Unfortunately 1108 * Logitech/Genius probes confuse some firmware 1109 * versions so we'll have to skip them. 1110 */ 1111 max_proto = PSMOUSE_IMEX; 1112 } 1113 1114 /* 1115 * Make sure that touchpad is in relative mode, gestures 1116 * (taps) are enabled. 1117 */ 1118 synaptics_reset(psmouse); 1119 } 1120 1121 /* 1122 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1123 * because Finger Sensing Pad probe upsets some modules of Cypress 1124 * Trackpads. 1125 */ 1126 if (max_proto > PSMOUSE_IMEX && 1127 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1128 set_properties, true)) { 1129 return PSMOUSE_CYPRESS; 1130 } 1131 1132 /* Try ALPS TouchPad */ 1133 if (max_proto > PSMOUSE_IMEX) { 1134 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1135 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1136 &max_proto, set_properties, true)) 1137 return PSMOUSE_ALPS; 1138 } 1139 1140 /* Try OLPC HGPK touchpad */ 1141 if (max_proto > PSMOUSE_IMEX && 1142 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1143 set_properties, true)) { 1144 return PSMOUSE_HGPK; 1145 } 1146 1147 /* Try Elantech touchpad */ 1148 if (max_proto > PSMOUSE_IMEX && 1149 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1150 &max_proto, set_properties, true)) { 1151 return PSMOUSE_ELANTECH; 1152 } 1153 1154 if (max_proto > PSMOUSE_IMEX) { 1155 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1156 &max_proto, set_properties, true)) 1157 return PSMOUSE_GENPS; 1158 1159 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1160 &max_proto, set_properties, true)) 1161 return PSMOUSE_PS2PP; 1162 1163 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1164 &max_proto, set_properties, true)) 1165 return PSMOUSE_TRACKPOINT; 1166 1167 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1168 &max_proto, set_properties, true)) 1169 return PSMOUSE_TOUCHKIT_PS2; 1170 } 1171 1172 /* 1173 * Try Finger Sensing Pad. We do it here because its probe upsets 1174 * Trackpoint devices (causing TP_READ_ID command to time out). 1175 */ 1176 if (max_proto > PSMOUSE_IMEX && 1177 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1178 &max_proto, set_properties, true)) { 1179 return PSMOUSE_FSP; 1180 } 1181 1182 /* 1183 * Reset to defaults in case the device got confused by extended 1184 * protocol probes. Note that we follow up with full reset because 1185 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1186 */ 1187 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1188 psmouse_reset(psmouse); 1189 1190 if (max_proto >= PSMOUSE_IMEX && 1191 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1192 &max_proto, set_properties, true)) { 1193 return PSMOUSE_IMEX; 1194 } 1195 1196 if (max_proto >= PSMOUSE_IMPS && 1197 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1198 &max_proto, set_properties, true)) { 1199 return PSMOUSE_IMPS; 1200 } 1201 1202 /* 1203 * Okay, all failed, we have a standard mouse here. The number of 1204 * the buttons is still a question, though. We assume 3. 1205 */ 1206 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1207 &max_proto, set_properties, true); 1208 1209 if (synaptics_hardware) { 1210 /* 1211 * We detected Synaptics hardware but it did not respond to 1212 * IMPS/2 probes. We need to reset the touchpad because if 1213 * there is a track point on the pass through port it could 1214 * get disabled while probing for protocol extensions. 1215 */ 1216 psmouse_reset(psmouse); 1217 } 1218 1219 return PSMOUSE_PS2; 1220 } 1221 1222 /* 1223 * psmouse_probe() probes for a PS/2 mouse. 1224 */ 1225 static int psmouse_probe(struct psmouse *psmouse) 1226 { 1227 struct ps2dev *ps2dev = &psmouse->ps2dev; 1228 unsigned char param[2]; 1229 1230 /* 1231 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1232 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1233 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1234 * subsequent ID queries, probably due to a firmware bug. 1235 */ 1236 param[0] = 0xa5; 1237 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 1238 return -1; 1239 1240 if (param[0] != 0x00 && param[0] != 0x03 && 1241 param[0] != 0x04 && param[0] != 0xff) 1242 return -1; 1243 1244 /* 1245 * Then we reset and disable the mouse so that it doesn't generate 1246 * events. 1247 */ 1248 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 1249 psmouse_warn(psmouse, "Failed to reset mouse on %s\n", 1250 ps2dev->serio->phys); 1251 1252 return 0; 1253 } 1254 1255 /* 1256 * psmouse_initialize() initializes the mouse to a sane state. 1257 */ 1258 static void psmouse_initialize(struct psmouse *psmouse) 1259 { 1260 /* 1261 * We set the mouse report rate, resolution and scaling. 1262 */ 1263 if (psmouse_max_proto != PSMOUSE_PS2) { 1264 psmouse->set_rate(psmouse, psmouse->rate); 1265 psmouse->set_resolution(psmouse, psmouse->resolution); 1266 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1267 } 1268 } 1269 1270 /* 1271 * psmouse_activate() enables the mouse so that we get motion reports from it. 1272 */ 1273 int psmouse_activate(struct psmouse *psmouse) 1274 { 1275 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1276 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1277 psmouse->ps2dev.serio->phys); 1278 return -1; 1279 } 1280 1281 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1282 return 0; 1283 } 1284 1285 /* 1286 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1287 * motion reports from it unless we explicitly request it. 1288 */ 1289 int psmouse_deactivate(struct psmouse *psmouse) 1290 { 1291 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) { 1292 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n", 1293 psmouse->ps2dev.serio->phys); 1294 return -1; 1295 } 1296 1297 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1298 return 0; 1299 } 1300 1301 /* 1302 * psmouse_resync() attempts to re-validate current protocol. 1303 */ 1304 static void psmouse_resync(struct work_struct *work) 1305 { 1306 struct psmouse *parent = NULL, *psmouse = 1307 container_of(work, struct psmouse, resync_work.work); 1308 struct serio *serio = psmouse->ps2dev.serio; 1309 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1310 bool failed = false, enabled = false; 1311 int i; 1312 1313 mutex_lock(&psmouse_mutex); 1314 1315 if (psmouse->state != PSMOUSE_RESYNCING) 1316 goto out; 1317 1318 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1319 parent = serio_get_drvdata(serio->parent); 1320 psmouse_deactivate(parent); 1321 } 1322 1323 /* 1324 * Some mice don't ACK commands sent while they are in the middle of 1325 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1326 * instead of ps2_command() which would wait for 200ms for an ACK 1327 * that may never come. 1328 * As an additional quirk ALPS touchpads may not only forget to ACK 1329 * disable command but will stop reporting taps, so if we see that 1330 * mouse at least once ACKs disable we will do full reconnect if ACK 1331 * is missing. 1332 */ 1333 psmouse->num_resyncs++; 1334 1335 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1336 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1337 failed = true; 1338 } else 1339 psmouse->acks_disable_command = true; 1340 1341 /* 1342 * Poll the mouse. If it was reset the packet will be shorter than 1343 * psmouse->pktsize and ps2_command will fail. We do not expect and 1344 * do not handle scenario when mouse "upgrades" its protocol while 1345 * disconnected since it would require additional delay. If we ever 1346 * see a mouse that does it we'll adjust the code. 1347 */ 1348 if (!failed) { 1349 if (psmouse->poll(psmouse)) 1350 failed = true; 1351 else { 1352 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1353 for (i = 0; i < psmouse->pktsize; i++) { 1354 psmouse->pktcnt++; 1355 rc = psmouse->protocol_handler(psmouse); 1356 if (rc != PSMOUSE_GOOD_DATA) 1357 break; 1358 } 1359 if (rc != PSMOUSE_FULL_PACKET) 1360 failed = true; 1361 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1362 } 1363 } 1364 1365 /* 1366 * Now try to enable mouse. We try to do that even if poll failed 1367 * and also repeat our attempts 5 times, otherwise we may be left 1368 * out with disabled mouse. 1369 */ 1370 for (i = 0; i < 5; i++) { 1371 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1372 enabled = true; 1373 break; 1374 } 1375 msleep(200); 1376 } 1377 1378 if (!enabled) { 1379 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1380 psmouse->ps2dev.serio->phys); 1381 failed = true; 1382 } 1383 1384 if (failed) { 1385 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1386 psmouse_info(psmouse, 1387 "resync failed, issuing reconnect request\n"); 1388 serio_reconnect(serio); 1389 } else 1390 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1391 1392 if (parent) 1393 psmouse_activate(parent); 1394 out: 1395 mutex_unlock(&psmouse_mutex); 1396 } 1397 1398 /* 1399 * psmouse_cleanup() resets the mouse into power-on state. 1400 */ 1401 static void psmouse_cleanup(struct serio *serio) 1402 { 1403 struct psmouse *psmouse = serio_get_drvdata(serio); 1404 struct psmouse *parent = NULL; 1405 1406 mutex_lock(&psmouse_mutex); 1407 1408 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1409 parent = serio_get_drvdata(serio->parent); 1410 psmouse_deactivate(parent); 1411 } 1412 1413 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1414 1415 /* 1416 * Disable stream mode so cleanup routine can proceed undisturbed. 1417 */ 1418 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1419 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1420 psmouse->ps2dev.serio->phys); 1421 1422 if (psmouse->cleanup) 1423 psmouse->cleanup(psmouse); 1424 1425 /* 1426 * Reset the mouse to defaults (bare PS/2 protocol). 1427 */ 1428 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1429 1430 /* 1431 * Some boxes, such as HP nx7400, get terribly confused if mouse 1432 * is not fully enabled before suspending/shutting down. 1433 */ 1434 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1435 1436 if (parent) { 1437 if (parent->pt_deactivate) 1438 parent->pt_deactivate(parent); 1439 1440 psmouse_activate(parent); 1441 } 1442 1443 mutex_unlock(&psmouse_mutex); 1444 } 1445 1446 /* 1447 * psmouse_disconnect() closes and frees. 1448 */ 1449 static void psmouse_disconnect(struct serio *serio) 1450 { 1451 struct psmouse *psmouse = serio_get_drvdata(serio); 1452 struct psmouse *parent = NULL; 1453 1454 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1455 1456 mutex_lock(&psmouse_mutex); 1457 1458 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1459 1460 /* make sure we don't have a resync in progress */ 1461 mutex_unlock(&psmouse_mutex); 1462 flush_workqueue(kpsmoused_wq); 1463 mutex_lock(&psmouse_mutex); 1464 1465 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1466 parent = serio_get_drvdata(serio->parent); 1467 psmouse_deactivate(parent); 1468 } 1469 1470 if (psmouse->disconnect) 1471 psmouse->disconnect(psmouse); 1472 1473 if (parent && parent->pt_deactivate) 1474 parent->pt_deactivate(parent); 1475 1476 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1477 1478 serio_close(serio); 1479 serio_set_drvdata(serio, NULL); 1480 1481 if (psmouse->dev) 1482 input_unregister_device(psmouse->dev); 1483 1484 kfree(psmouse); 1485 1486 if (parent) 1487 psmouse_activate(parent); 1488 1489 mutex_unlock(&psmouse_mutex); 1490 } 1491 1492 static int psmouse_switch_protocol(struct psmouse *psmouse, 1493 const struct psmouse_protocol *proto) 1494 { 1495 const struct psmouse_protocol *selected_proto; 1496 struct input_dev *input_dev = psmouse->dev; 1497 enum psmouse_type type; 1498 1499 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1500 1501 if (proto && (proto->detect || proto->init)) { 1502 psmouse_apply_defaults(psmouse); 1503 1504 if (proto->detect && proto->detect(psmouse, true) < 0) 1505 return -1; 1506 1507 if (proto->init && proto->init(psmouse) < 0) 1508 return -1; 1509 1510 selected_proto = proto; 1511 } else { 1512 type = psmouse_extensions(psmouse, psmouse_max_proto, true); 1513 selected_proto = psmouse_protocol_by_type(type); 1514 } 1515 1516 psmouse->protocol = selected_proto; 1517 1518 /* 1519 * If mouse's packet size is 3 there is no point in polling the 1520 * device in hopes to detect protocol reset - we won't get less 1521 * than 3 bytes response anyhow. 1522 */ 1523 if (psmouse->pktsize == 3) 1524 psmouse->resync_time = 0; 1525 1526 /* 1527 * Some smart KVMs fake response to POLL command returning just 1528 * 3 bytes and messing up our resync logic, so if initial poll 1529 * fails we won't try polling the device anymore. Hopefully 1530 * such KVM will maintain initially selected protocol. 1531 */ 1532 if (psmouse->resync_time && psmouse->poll(psmouse)) 1533 psmouse->resync_time = 0; 1534 1535 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1536 selected_proto->name, psmouse->vendor, psmouse->name); 1537 1538 input_dev->name = psmouse->devname; 1539 input_dev->phys = psmouse->phys; 1540 input_dev->id.bustype = BUS_I8042; 1541 input_dev->id.vendor = 0x0002; 1542 input_dev->id.product = psmouse->protocol->type; 1543 input_dev->id.version = psmouse->model; 1544 1545 return 0; 1546 } 1547 1548 /* 1549 * psmouse_connect() is a callback from the serio module when 1550 * an unhandled serio port is found. 1551 */ 1552 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1553 { 1554 struct psmouse *psmouse, *parent = NULL; 1555 struct input_dev *input_dev; 1556 int retval = 0, error = -ENOMEM; 1557 1558 mutex_lock(&psmouse_mutex); 1559 1560 /* 1561 * If this is a pass-through port deactivate parent so the device 1562 * connected to this port can be successfully identified 1563 */ 1564 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1565 parent = serio_get_drvdata(serio->parent); 1566 psmouse_deactivate(parent); 1567 } 1568 1569 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1570 input_dev = input_allocate_device(); 1571 if (!psmouse || !input_dev) 1572 goto err_free; 1573 1574 ps2_init(&psmouse->ps2dev, serio); 1575 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1576 psmouse->dev = input_dev; 1577 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1578 1579 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1580 1581 serio_set_drvdata(serio, psmouse); 1582 1583 error = serio_open(serio, drv); 1584 if (error) 1585 goto err_clear_drvdata; 1586 1587 /* give PT device some time to settle down before probing */ 1588 if (serio->id.type == SERIO_PS_PSTHRU) 1589 usleep_range(10000, 15000); 1590 1591 if (psmouse_probe(psmouse) < 0) { 1592 error = -ENODEV; 1593 goto err_close_serio; 1594 } 1595 1596 psmouse->rate = psmouse_rate; 1597 psmouse->resolution = psmouse_resolution; 1598 psmouse->resetafter = psmouse_resetafter; 1599 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1600 psmouse->smartscroll = psmouse_smartscroll; 1601 1602 psmouse_switch_protocol(psmouse, NULL); 1603 1604 if (!psmouse->protocol->smbus_companion) { 1605 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1606 psmouse_initialize(psmouse); 1607 1608 error = input_register_device(input_dev); 1609 if (error) 1610 goto err_protocol_disconnect; 1611 } else { 1612 /* Smbus companion will be reporting events, not us. */ 1613 input_free_device(input_dev); 1614 psmouse->dev = input_dev = NULL; 1615 } 1616 1617 if (parent && parent->pt_activate) 1618 parent->pt_activate(parent); 1619 1620 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1621 if (error) 1622 goto err_pt_deactivate; 1623 1624 /* 1625 * PS/2 devices having SMBus companions should stay disabled 1626 * on PS/2 side, in order to have SMBus part operable. 1627 */ 1628 if (!psmouse->protocol->smbus_companion) 1629 psmouse_activate(psmouse); 1630 1631 out: 1632 /* If this is a pass-through port the parent needs to be re-activated */ 1633 if (parent) 1634 psmouse_activate(parent); 1635 1636 mutex_unlock(&psmouse_mutex); 1637 return retval; 1638 1639 err_pt_deactivate: 1640 if (parent && parent->pt_deactivate) 1641 parent->pt_deactivate(parent); 1642 if (input_dev) { 1643 input_unregister_device(input_dev); 1644 input_dev = NULL; /* so we don't try to free it below */ 1645 } 1646 err_protocol_disconnect: 1647 if (psmouse->disconnect) 1648 psmouse->disconnect(psmouse); 1649 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1650 err_close_serio: 1651 serio_close(serio); 1652 err_clear_drvdata: 1653 serio_set_drvdata(serio, NULL); 1654 err_free: 1655 input_free_device(input_dev); 1656 kfree(psmouse); 1657 1658 retval = error; 1659 goto out; 1660 } 1661 1662 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect) 1663 { 1664 struct psmouse *psmouse = serio_get_drvdata(serio); 1665 struct psmouse *parent = NULL; 1666 int (*reconnect_handler)(struct psmouse *); 1667 enum psmouse_type type; 1668 int rc = -1; 1669 1670 mutex_lock(&psmouse_mutex); 1671 1672 if (fast_reconnect) { 1673 reconnect_handler = psmouse->fast_reconnect; 1674 if (!reconnect_handler) { 1675 rc = -ENOENT; 1676 goto out_unlock; 1677 } 1678 } else { 1679 reconnect_handler = psmouse->reconnect; 1680 } 1681 1682 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1683 parent = serio_get_drvdata(serio->parent); 1684 psmouse_deactivate(parent); 1685 } 1686 1687 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1688 1689 if (reconnect_handler) { 1690 if (reconnect_handler(psmouse)) 1691 goto out; 1692 } else { 1693 psmouse_reset(psmouse); 1694 1695 if (psmouse_probe(psmouse) < 0) 1696 goto out; 1697 1698 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1699 if (psmouse->protocol->type != type) 1700 goto out; 1701 } 1702 1703 /* 1704 * OK, the device type (and capabilities) match the old one, 1705 * we can continue using it, complete initialization 1706 */ 1707 if (!psmouse->protocol->smbus_companion) { 1708 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1709 psmouse_initialize(psmouse); 1710 } 1711 1712 if (parent && parent->pt_activate) 1713 parent->pt_activate(parent); 1714 1715 /* 1716 * PS/2 devices having SMBus companions should stay disabled 1717 * on PS/2 side, in order to have SMBus part operable. 1718 */ 1719 if (!psmouse->protocol->smbus_companion) 1720 psmouse_activate(psmouse); 1721 1722 rc = 0; 1723 1724 out: 1725 /* If this is a pass-through port the parent waits to be activated */ 1726 if (parent) 1727 psmouse_activate(parent); 1728 1729 out_unlock: 1730 mutex_unlock(&psmouse_mutex); 1731 return rc; 1732 } 1733 1734 static int psmouse_reconnect(struct serio *serio) 1735 { 1736 return __psmouse_reconnect(serio, false); 1737 } 1738 1739 static int psmouse_fast_reconnect(struct serio *serio) 1740 { 1741 return __psmouse_reconnect(serio, true); 1742 } 1743 1744 static struct serio_device_id psmouse_serio_ids[] = { 1745 { 1746 .type = SERIO_8042, 1747 .proto = SERIO_ANY, 1748 .id = SERIO_ANY, 1749 .extra = SERIO_ANY, 1750 }, 1751 { 1752 .type = SERIO_PS_PSTHRU, 1753 .proto = SERIO_ANY, 1754 .id = SERIO_ANY, 1755 .extra = SERIO_ANY, 1756 }, 1757 { 0 } 1758 }; 1759 1760 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1761 1762 static struct serio_driver psmouse_drv = { 1763 .driver = { 1764 .name = "psmouse", 1765 }, 1766 .description = DRIVER_DESC, 1767 .id_table = psmouse_serio_ids, 1768 .interrupt = psmouse_interrupt, 1769 .connect = psmouse_connect, 1770 .reconnect = psmouse_reconnect, 1771 .fast_reconnect = psmouse_fast_reconnect, 1772 .disconnect = psmouse_disconnect, 1773 .cleanup = psmouse_cleanup, 1774 }; 1775 1776 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1777 char *buf) 1778 { 1779 struct serio *serio = to_serio_port(dev); 1780 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1781 struct psmouse *psmouse = serio_get_drvdata(serio); 1782 1783 if (psmouse->protocol->smbus_companion && 1784 devattr != &psmouse_attr_protocol.dattr) 1785 return -ENOENT; 1786 1787 return attr->show(psmouse, attr->data, buf); 1788 } 1789 1790 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1791 const char *buf, size_t count) 1792 { 1793 struct serio *serio = to_serio_port(dev); 1794 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1795 struct psmouse *psmouse, *parent = NULL; 1796 int retval; 1797 1798 retval = mutex_lock_interruptible(&psmouse_mutex); 1799 if (retval) 1800 goto out; 1801 1802 psmouse = serio_get_drvdata(serio); 1803 1804 if (psmouse->protocol->smbus_companion && 1805 devattr != &psmouse_attr_protocol.dattr) { 1806 retval = -ENOENT; 1807 goto out_unlock; 1808 } 1809 1810 if (attr->protect) { 1811 if (psmouse->state == PSMOUSE_IGNORE) { 1812 retval = -ENODEV; 1813 goto out_unlock; 1814 } 1815 1816 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1817 parent = serio_get_drvdata(serio->parent); 1818 psmouse_deactivate(parent); 1819 } 1820 1821 if (!psmouse->protocol->smbus_companion) 1822 psmouse_deactivate(psmouse); 1823 } 1824 1825 retval = attr->set(psmouse, attr->data, buf, count); 1826 1827 if (attr->protect) { 1828 if (retval != -ENODEV && !psmouse->protocol->smbus_companion) 1829 psmouse_activate(psmouse); 1830 1831 if (parent) 1832 psmouse_activate(parent); 1833 } 1834 1835 out_unlock: 1836 mutex_unlock(&psmouse_mutex); 1837 out: 1838 return retval; 1839 } 1840 1841 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1842 { 1843 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1844 1845 return sprintf(buf, "%u\n", *field); 1846 } 1847 1848 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1849 { 1850 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1851 unsigned int value; 1852 int err; 1853 1854 err = kstrtouint(buf, 10, &value); 1855 if (err) 1856 return err; 1857 1858 *field = value; 1859 1860 return count; 1861 } 1862 1863 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1864 { 1865 return sprintf(buf, "%s\n", psmouse->protocol->name); 1866 } 1867 1868 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1869 { 1870 struct serio *serio = psmouse->ps2dev.serio; 1871 struct psmouse *parent = NULL; 1872 struct input_dev *old_dev, *new_dev; 1873 const struct psmouse_protocol *proto, *old_proto; 1874 int error; 1875 int retry = 0; 1876 1877 proto = psmouse_protocol_by_name(buf, count); 1878 if (!proto) 1879 return -EINVAL; 1880 1881 if (psmouse->protocol == proto) 1882 return count; 1883 1884 new_dev = input_allocate_device(); 1885 if (!new_dev) 1886 return -ENOMEM; 1887 1888 while (!list_empty(&serio->children)) { 1889 if (++retry > 3) { 1890 psmouse_warn(psmouse, 1891 "failed to destroy children ports, protocol change aborted.\n"); 1892 input_free_device(new_dev); 1893 return -EIO; 1894 } 1895 1896 mutex_unlock(&psmouse_mutex); 1897 serio_unregister_child_port(serio); 1898 mutex_lock(&psmouse_mutex); 1899 1900 if (serio->drv != &psmouse_drv) { 1901 input_free_device(new_dev); 1902 return -ENODEV; 1903 } 1904 1905 if (psmouse->protocol == proto) { 1906 input_free_device(new_dev); 1907 return count; /* switched by other thread */ 1908 } 1909 } 1910 1911 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1912 parent = serio_get_drvdata(serio->parent); 1913 if (parent->pt_deactivate) 1914 parent->pt_deactivate(parent); 1915 } 1916 1917 old_dev = psmouse->dev; 1918 old_proto = psmouse->protocol; 1919 1920 if (psmouse->disconnect) 1921 psmouse->disconnect(psmouse); 1922 1923 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1924 1925 psmouse->dev = new_dev; 1926 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1927 1928 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1929 psmouse_reset(psmouse); 1930 /* default to PSMOUSE_PS2 */ 1931 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1932 } 1933 1934 psmouse_initialize(psmouse); 1935 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1936 1937 if (psmouse->protocol->smbus_companion) { 1938 input_free_device(psmouse->dev); 1939 psmouse->dev = NULL; 1940 } else { 1941 error = input_register_device(psmouse->dev); 1942 if (error) { 1943 if (psmouse->disconnect) 1944 psmouse->disconnect(psmouse); 1945 1946 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1947 input_free_device(new_dev); 1948 psmouse->dev = old_dev; 1949 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1950 psmouse_switch_protocol(psmouse, old_proto); 1951 psmouse_initialize(psmouse); 1952 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1953 1954 return error; 1955 } 1956 } 1957 1958 if (old_dev) 1959 input_unregister_device(old_dev); 1960 1961 if (parent && parent->pt_activate) 1962 parent->pt_activate(parent); 1963 1964 return count; 1965 } 1966 1967 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1968 { 1969 unsigned int value; 1970 int err; 1971 1972 err = kstrtouint(buf, 10, &value); 1973 if (err) 1974 return err; 1975 1976 psmouse->set_rate(psmouse, value); 1977 return count; 1978 } 1979 1980 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1981 { 1982 unsigned int value; 1983 int err; 1984 1985 err = kstrtouint(buf, 10, &value); 1986 if (err) 1987 return err; 1988 1989 psmouse->set_resolution(psmouse, value); 1990 return count; 1991 } 1992 1993 1994 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 1995 { 1996 const struct psmouse_protocol *proto; 1997 1998 if (!val) 1999 return -EINVAL; 2000 2001 proto = psmouse_protocol_by_name(val, strlen(val)); 2002 2003 if (!proto || !proto->maxproto) 2004 return -EINVAL; 2005 2006 *((unsigned int *)kp->arg) = proto->type; 2007 2008 return 0; 2009 } 2010 2011 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 2012 { 2013 int type = *((unsigned int *)kp->arg); 2014 2015 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 2016 } 2017 2018 static int __init psmouse_init(void) 2019 { 2020 int err; 2021 2022 lifebook_module_init(); 2023 synaptics_module_init(); 2024 hgpk_module_init(); 2025 2026 err = psmouse_smbus_module_init(); 2027 if (err) 2028 return err; 2029 2030 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); 2031 if (!kpsmoused_wq) { 2032 pr_err("failed to create kpsmoused workqueue\n"); 2033 err = -ENOMEM; 2034 goto err_smbus_exit; 2035 } 2036 2037 err = serio_register_driver(&psmouse_drv); 2038 if (err) 2039 goto err_destroy_wq; 2040 2041 return 0; 2042 2043 err_destroy_wq: 2044 destroy_workqueue(kpsmoused_wq); 2045 err_smbus_exit: 2046 psmouse_smbus_module_exit(); 2047 return err; 2048 } 2049 2050 static void __exit psmouse_exit(void) 2051 { 2052 serio_unregister_driver(&psmouse_drv); 2053 destroy_workqueue(kpsmoused_wq); 2054 psmouse_smbus_module_exit(); 2055 } 2056 2057 module_init(psmouse_init); 2058 module_exit(psmouse_exit); 2059