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_try_protocol(struct psmouse *psmouse, 979 enum psmouse_type type, 980 unsigned int *max_proto, 981 bool set_properties, bool init_allowed) 982 { 983 const struct psmouse_protocol *proto; 984 985 proto = __psmouse_protocol_by_type(type); 986 if (!proto) 987 return false; 988 989 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && 990 !proto->try_passthru) { 991 return false; 992 } 993 994 if (set_properties) 995 psmouse_apply_defaults(psmouse); 996 997 if (proto->detect(psmouse, set_properties) != 0) 998 return false; 999 1000 if (set_properties && proto->init && init_allowed) { 1001 if (proto->init(psmouse) != 0) { 1002 /* 1003 * We detected device, but init failed. Adjust 1004 * max_proto so we only try standard protocols. 1005 */ 1006 if (*max_proto > PSMOUSE_IMEX) 1007 *max_proto = PSMOUSE_IMEX; 1008 1009 return false; 1010 } 1011 } 1012 1013 return true; 1014 } 1015 1016 /* 1017 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol 1018 * the mouse may have. 1019 */ 1020 static int psmouse_extensions(struct psmouse *psmouse, 1021 unsigned int max_proto, bool set_properties) 1022 { 1023 bool synaptics_hardware = false; 1024 int ret; 1025 1026 /* 1027 * Always check for focaltech, this is safe as it uses pnp-id 1028 * matching. 1029 */ 1030 if (psmouse_try_protocol(psmouse, PSMOUSE_FOCALTECH, 1031 &max_proto, set_properties, false)) { 1032 if (max_proto > PSMOUSE_IMEX && 1033 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && 1034 (!set_properties || focaltech_init(psmouse) == 0)) { 1035 return PSMOUSE_FOCALTECH; 1036 } 1037 /* 1038 * Restrict psmouse_max_proto so that psmouse_initialize() 1039 * does not try to reset rate and resolution, because even 1040 * that upsets the device. 1041 * This also causes us to basically fall through to basic 1042 * protocol detection, where we fully reset the mouse, 1043 * and set it up as bare PS/2 protocol device. 1044 */ 1045 psmouse_max_proto = max_proto = PSMOUSE_PS2; 1046 } 1047 1048 /* 1049 * We always check for LifeBook because it does not disturb mouse 1050 * (it only checks DMI information). 1051 */ 1052 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, 1053 set_properties, max_proto > PSMOUSE_IMEX)) 1054 return PSMOUSE_LIFEBOOK; 1055 1056 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, 1057 set_properties, max_proto > PSMOUSE_IMEX)) 1058 return PSMOUSE_VMMOUSE; 1059 1060 /* 1061 * Try Kensington ThinkingMouse (we try first, because Synaptics 1062 * probe upsets the ThinkingMouse). 1063 */ 1064 if (max_proto > PSMOUSE_IMEX && 1065 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, 1066 set_properties, true)) { 1067 return PSMOUSE_THINKPS; 1068 } 1069 1070 /* 1071 * Try Synaptics TouchPad. Note that probing is done even if 1072 * Synaptics protocol support is disabled in config - we need to 1073 * know if it is Synaptics so we can reset it properly after 1074 * probing for IntelliMouse. 1075 */ 1076 if (max_proto > PSMOUSE_PS2 && 1077 psmouse_try_protocol(psmouse, PSMOUSE_SYNAPTICS, &max_proto, 1078 set_properties, false)) { 1079 synaptics_hardware = true; 1080 1081 if (max_proto > PSMOUSE_IMEX) { 1082 /* 1083 * Try activating protocol, but check if support is 1084 * enabled first, since we try detecting Synaptics 1085 * even when protocol is disabled. 1086 */ 1087 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || 1088 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { 1089 if (!set_properties) 1090 return PSMOUSE_SYNAPTICS; 1091 1092 ret = synaptics_init(psmouse); 1093 if (ret >= 0) 1094 return ret; 1095 } 1096 1097 /* 1098 * Some Synaptics touchpads can emulate extended 1099 * protocols (like IMPS/2). Unfortunately 1100 * Logitech/Genius probes confuse some firmware 1101 * versions so we'll have to skip them. 1102 */ 1103 max_proto = PSMOUSE_IMEX; 1104 } 1105 1106 /* 1107 * Make sure that touchpad is in relative mode, gestures 1108 * (taps) are enabled. 1109 */ 1110 synaptics_reset(psmouse); 1111 } 1112 1113 /* 1114 * Try Cypress Trackpad. We must try it before Finger Sensing Pad 1115 * because Finger Sensing Pad probe upsets some modules of Cypress 1116 * Trackpads. 1117 */ 1118 if (max_proto > PSMOUSE_IMEX && 1119 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, 1120 set_properties, true)) { 1121 return PSMOUSE_CYPRESS; 1122 } 1123 1124 /* Try ALPS TouchPad */ 1125 if (max_proto > PSMOUSE_IMEX) { 1126 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1127 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1128 &max_proto, set_properties, true)) 1129 return PSMOUSE_ALPS; 1130 } 1131 1132 /* Try OLPC HGPK touchpad */ 1133 if (max_proto > PSMOUSE_IMEX && 1134 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1135 set_properties, true)) { 1136 return PSMOUSE_HGPK; 1137 } 1138 1139 /* Try Elantech touchpad */ 1140 if (max_proto > PSMOUSE_IMEX && 1141 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, 1142 &max_proto, set_properties, true)) { 1143 return PSMOUSE_ELANTECH; 1144 } 1145 1146 if (max_proto > PSMOUSE_IMEX) { 1147 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, 1148 &max_proto, set_properties, true)) 1149 return PSMOUSE_GENPS; 1150 1151 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, 1152 &max_proto, set_properties, true)) 1153 return PSMOUSE_PS2PP; 1154 1155 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, 1156 &max_proto, set_properties, true)) 1157 return PSMOUSE_TRACKPOINT; 1158 1159 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, 1160 &max_proto, set_properties, true)) 1161 return PSMOUSE_TOUCHKIT_PS2; 1162 } 1163 1164 /* 1165 * Try Finger Sensing Pad. We do it here because its probe upsets 1166 * Trackpoint devices (causing TP_READ_ID command to time out). 1167 */ 1168 if (max_proto > PSMOUSE_IMEX && 1169 psmouse_try_protocol(psmouse, PSMOUSE_FSP, 1170 &max_proto, set_properties, true)) { 1171 return PSMOUSE_FSP; 1172 } 1173 1174 /* 1175 * Reset to defaults in case the device got confused by extended 1176 * protocol probes. Note that we follow up with full reset because 1177 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. 1178 */ 1179 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1180 psmouse_reset(psmouse); 1181 1182 if (max_proto >= PSMOUSE_IMEX && 1183 psmouse_try_protocol(psmouse, PSMOUSE_IMEX, 1184 &max_proto, set_properties, true)) { 1185 return PSMOUSE_IMEX; 1186 } 1187 1188 if (max_proto >= PSMOUSE_IMPS && 1189 psmouse_try_protocol(psmouse, PSMOUSE_IMPS, 1190 &max_proto, set_properties, true)) { 1191 return PSMOUSE_IMPS; 1192 } 1193 1194 /* 1195 * Okay, all failed, we have a standard mouse here. The number of 1196 * the buttons is still a question, though. We assume 3. 1197 */ 1198 psmouse_try_protocol(psmouse, PSMOUSE_PS2, 1199 &max_proto, set_properties, true); 1200 1201 if (synaptics_hardware) { 1202 /* 1203 * We detected Synaptics hardware but it did not respond to 1204 * IMPS/2 probes. We need to reset the touchpad because if 1205 * there is a track point on the pass through port it could 1206 * get disabled while probing for protocol extensions. 1207 */ 1208 psmouse_reset(psmouse); 1209 } 1210 1211 return PSMOUSE_PS2; 1212 } 1213 1214 /* 1215 * psmouse_probe() probes for a PS/2 mouse. 1216 */ 1217 static int psmouse_probe(struct psmouse *psmouse) 1218 { 1219 struct ps2dev *ps2dev = &psmouse->ps2dev; 1220 unsigned char param[2]; 1221 1222 /* 1223 * First, we check if it's a mouse. It should send 0x00 or 0x03 in 1224 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. 1225 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and 1226 * subsequent ID queries, probably due to a firmware bug. 1227 */ 1228 param[0] = 0xa5; 1229 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 1230 return -1; 1231 1232 if (param[0] != 0x00 && param[0] != 0x03 && 1233 param[0] != 0x04 && param[0] != 0xff) 1234 return -1; 1235 1236 /* 1237 * Then we reset and disable the mouse so that it doesn't generate 1238 * events. 1239 */ 1240 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) 1241 psmouse_warn(psmouse, "Failed to reset mouse on %s\n", 1242 ps2dev->serio->phys); 1243 1244 return 0; 1245 } 1246 1247 /* 1248 * psmouse_initialize() initializes the mouse to a sane state. 1249 */ 1250 static void psmouse_initialize(struct psmouse *psmouse) 1251 { 1252 /* 1253 * We set the mouse report rate, resolution and scaling. 1254 */ 1255 if (psmouse_max_proto != PSMOUSE_PS2) { 1256 psmouse->set_rate(psmouse, psmouse->rate); 1257 psmouse->set_resolution(psmouse, psmouse->resolution); 1258 psmouse->set_scale(psmouse, PSMOUSE_SCALE11); 1259 } 1260 } 1261 1262 /* 1263 * psmouse_activate() enables the mouse so that we get motion reports from it. 1264 */ 1265 int psmouse_activate(struct psmouse *psmouse) 1266 { 1267 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1268 psmouse_warn(psmouse, "Failed to enable mouse on %s\n", 1269 psmouse->ps2dev.serio->phys); 1270 return -1; 1271 } 1272 1273 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1274 return 0; 1275 } 1276 1277 /* 1278 * psmouse_deactivate() puts the mouse into poll mode so that we don't get 1279 * motion reports from it unless we explicitly request it. 1280 */ 1281 int psmouse_deactivate(struct psmouse *psmouse) 1282 { 1283 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) { 1284 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n", 1285 psmouse->ps2dev.serio->phys); 1286 return -1; 1287 } 1288 1289 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1290 return 0; 1291 } 1292 1293 /* 1294 * psmouse_resync() attempts to re-validate current protocol. 1295 */ 1296 static void psmouse_resync(struct work_struct *work) 1297 { 1298 struct psmouse *parent = NULL, *psmouse = 1299 container_of(work, struct psmouse, resync_work.work); 1300 struct serio *serio = psmouse->ps2dev.serio; 1301 psmouse_ret_t rc = PSMOUSE_GOOD_DATA; 1302 bool failed = false, enabled = false; 1303 int i; 1304 1305 mutex_lock(&psmouse_mutex); 1306 1307 if (psmouse->state != PSMOUSE_RESYNCING) 1308 goto out; 1309 1310 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1311 parent = serio_get_drvdata(serio->parent); 1312 psmouse_deactivate(parent); 1313 } 1314 1315 /* 1316 * Some mice don't ACK commands sent while they are in the middle of 1317 * transmitting motion packet. To avoid delay we use ps2_sendbyte() 1318 * instead of ps2_command() which would wait for 200ms for an ACK 1319 * that may never come. 1320 * As an additional quirk ALPS touchpads may not only forget to ACK 1321 * disable command but will stop reporting taps, so if we see that 1322 * mouse at least once ACKs disable we will do full reconnect if ACK 1323 * is missing. 1324 */ 1325 psmouse->num_resyncs++; 1326 1327 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { 1328 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) 1329 failed = true; 1330 } else 1331 psmouse->acks_disable_command = true; 1332 1333 /* 1334 * Poll the mouse. If it was reset the packet will be shorter than 1335 * psmouse->pktsize and ps2_command will fail. We do not expect and 1336 * do not handle scenario when mouse "upgrades" its protocol while 1337 * disconnected since it would require additional delay. If we ever 1338 * see a mouse that does it we'll adjust the code. 1339 */ 1340 if (!failed) { 1341 if (psmouse->poll(psmouse)) 1342 failed = true; 1343 else { 1344 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1345 for (i = 0; i < psmouse->pktsize; i++) { 1346 psmouse->pktcnt++; 1347 rc = psmouse->protocol_handler(psmouse); 1348 if (rc != PSMOUSE_GOOD_DATA) 1349 break; 1350 } 1351 if (rc != PSMOUSE_FULL_PACKET) 1352 failed = true; 1353 psmouse_set_state(psmouse, PSMOUSE_RESYNCING); 1354 } 1355 } 1356 1357 /* 1358 * Now try to enable mouse. We try to do that even if poll failed 1359 * and also repeat our attempts 5 times, otherwise we may be left 1360 * out with disabled mouse. 1361 */ 1362 for (i = 0; i < 5; i++) { 1363 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 1364 enabled = true; 1365 break; 1366 } 1367 msleep(200); 1368 } 1369 1370 if (!enabled) { 1371 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", 1372 psmouse->ps2dev.serio->phys); 1373 failed = true; 1374 } 1375 1376 if (failed) { 1377 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1378 psmouse_info(psmouse, 1379 "resync failed, issuing reconnect request\n"); 1380 serio_reconnect(serio); 1381 } else 1382 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); 1383 1384 if (parent) 1385 psmouse_activate(parent); 1386 out: 1387 mutex_unlock(&psmouse_mutex); 1388 } 1389 1390 /* 1391 * psmouse_cleanup() resets the mouse into power-on state. 1392 */ 1393 static void psmouse_cleanup(struct serio *serio) 1394 { 1395 struct psmouse *psmouse = serio_get_drvdata(serio); 1396 struct psmouse *parent = NULL; 1397 1398 mutex_lock(&psmouse_mutex); 1399 1400 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1401 parent = serio_get_drvdata(serio->parent); 1402 psmouse_deactivate(parent); 1403 } 1404 1405 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1406 1407 /* 1408 * Disable stream mode so cleanup routine can proceed undisturbed. 1409 */ 1410 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1411 psmouse_warn(psmouse, "Failed to disable mouse on %s\n", 1412 psmouse->ps2dev.serio->phys); 1413 1414 if (psmouse->cleanup) 1415 psmouse->cleanup(psmouse); 1416 1417 /* 1418 * Reset the mouse to defaults (bare PS/2 protocol). 1419 */ 1420 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); 1421 1422 /* 1423 * Some boxes, such as HP nx7400, get terribly confused if mouse 1424 * is not fully enabled before suspending/shutting down. 1425 */ 1426 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); 1427 1428 if (parent) { 1429 if (parent->pt_deactivate) 1430 parent->pt_deactivate(parent); 1431 1432 psmouse_activate(parent); 1433 } 1434 1435 mutex_unlock(&psmouse_mutex); 1436 } 1437 1438 /* 1439 * psmouse_disconnect() closes and frees. 1440 */ 1441 static void psmouse_disconnect(struct serio *serio) 1442 { 1443 struct psmouse *psmouse = serio_get_drvdata(serio); 1444 struct psmouse *parent = NULL; 1445 1446 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); 1447 1448 mutex_lock(&psmouse_mutex); 1449 1450 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1451 1452 /* make sure we don't have a resync in progress */ 1453 mutex_unlock(&psmouse_mutex); 1454 flush_workqueue(kpsmoused_wq); 1455 mutex_lock(&psmouse_mutex); 1456 1457 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1458 parent = serio_get_drvdata(serio->parent); 1459 psmouse_deactivate(parent); 1460 } 1461 1462 if (psmouse->disconnect) 1463 psmouse->disconnect(psmouse); 1464 1465 if (parent && parent->pt_deactivate) 1466 parent->pt_deactivate(parent); 1467 1468 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1469 1470 serio_close(serio); 1471 serio_set_drvdata(serio, NULL); 1472 1473 if (psmouse->dev) 1474 input_unregister_device(psmouse->dev); 1475 1476 kfree(psmouse); 1477 1478 if (parent) 1479 psmouse_activate(parent); 1480 1481 mutex_unlock(&psmouse_mutex); 1482 } 1483 1484 static int psmouse_switch_protocol(struct psmouse *psmouse, 1485 const struct psmouse_protocol *proto) 1486 { 1487 const struct psmouse_protocol *selected_proto; 1488 struct input_dev *input_dev = psmouse->dev; 1489 enum psmouse_type type; 1490 1491 input_dev->dev.parent = &psmouse->ps2dev.serio->dev; 1492 1493 if (proto && (proto->detect || proto->init)) { 1494 psmouse_apply_defaults(psmouse); 1495 1496 if (proto->detect && proto->detect(psmouse, true) < 0) 1497 return -1; 1498 1499 if (proto->init && proto->init(psmouse) < 0) 1500 return -1; 1501 1502 selected_proto = proto; 1503 } else { 1504 type = psmouse_extensions(psmouse, psmouse_max_proto, true); 1505 selected_proto = psmouse_protocol_by_type(type); 1506 } 1507 1508 psmouse->protocol = selected_proto; 1509 1510 /* 1511 * If mouse's packet size is 3 there is no point in polling the 1512 * device in hopes to detect protocol reset - we won't get less 1513 * than 3 bytes response anyhow. 1514 */ 1515 if (psmouse->pktsize == 3) 1516 psmouse->resync_time = 0; 1517 1518 /* 1519 * Some smart KVMs fake response to POLL command returning just 1520 * 3 bytes and messing up our resync logic, so if initial poll 1521 * fails we won't try polling the device anymore. Hopefully 1522 * such KVM will maintain initially selected protocol. 1523 */ 1524 if (psmouse->resync_time && psmouse->poll(psmouse)) 1525 psmouse->resync_time = 0; 1526 1527 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", 1528 selected_proto->name, psmouse->vendor, psmouse->name); 1529 1530 input_dev->name = psmouse->devname; 1531 input_dev->phys = psmouse->phys; 1532 input_dev->id.bustype = BUS_I8042; 1533 input_dev->id.vendor = 0x0002; 1534 input_dev->id.product = psmouse->protocol->type; 1535 input_dev->id.version = psmouse->model; 1536 1537 return 0; 1538 } 1539 1540 /* 1541 * psmouse_connect() is a callback from the serio module when 1542 * an unhandled serio port is found. 1543 */ 1544 static int psmouse_connect(struct serio *serio, struct serio_driver *drv) 1545 { 1546 struct psmouse *psmouse, *parent = NULL; 1547 struct input_dev *input_dev; 1548 int retval = 0, error = -ENOMEM; 1549 1550 mutex_lock(&psmouse_mutex); 1551 1552 /* 1553 * If this is a pass-through port deactivate parent so the device 1554 * connected to this port can be successfully identified 1555 */ 1556 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1557 parent = serio_get_drvdata(serio->parent); 1558 psmouse_deactivate(parent); 1559 } 1560 1561 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); 1562 input_dev = input_allocate_device(); 1563 if (!psmouse || !input_dev) 1564 goto err_free; 1565 1566 ps2_init(&psmouse->ps2dev, serio); 1567 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); 1568 psmouse->dev = input_dev; 1569 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); 1570 1571 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1572 1573 serio_set_drvdata(serio, psmouse); 1574 1575 error = serio_open(serio, drv); 1576 if (error) 1577 goto err_clear_drvdata; 1578 1579 /* give PT device some time to settle down before probing */ 1580 if (serio->id.type == SERIO_PS_PSTHRU) 1581 usleep_range(10000, 15000); 1582 1583 if (psmouse_probe(psmouse) < 0) { 1584 error = -ENODEV; 1585 goto err_close_serio; 1586 } 1587 1588 psmouse->rate = psmouse_rate; 1589 psmouse->resolution = psmouse_resolution; 1590 psmouse->resetafter = psmouse_resetafter; 1591 psmouse->resync_time = parent ? 0 : psmouse_resync_time; 1592 psmouse->smartscroll = psmouse_smartscroll; 1593 1594 psmouse_switch_protocol(psmouse, NULL); 1595 1596 if (!psmouse->protocol->smbus_companion) { 1597 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1598 psmouse_initialize(psmouse); 1599 1600 error = input_register_device(input_dev); 1601 if (error) 1602 goto err_protocol_disconnect; 1603 } else { 1604 /* Smbus companion will be reporting events, not us. */ 1605 input_free_device(input_dev); 1606 psmouse->dev = input_dev = NULL; 1607 } 1608 1609 if (parent && parent->pt_activate) 1610 parent->pt_activate(parent); 1611 1612 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); 1613 if (error) 1614 goto err_pt_deactivate; 1615 1616 /* 1617 * PS/2 devices having SMBus companions should stay disabled 1618 * on PS/2 side, in order to have SMBus part operable. 1619 */ 1620 if (!psmouse->protocol->smbus_companion) 1621 psmouse_activate(psmouse); 1622 1623 out: 1624 /* If this is a pass-through port the parent needs to be re-activated */ 1625 if (parent) 1626 psmouse_activate(parent); 1627 1628 mutex_unlock(&psmouse_mutex); 1629 return retval; 1630 1631 err_pt_deactivate: 1632 if (parent && parent->pt_deactivate) 1633 parent->pt_deactivate(parent); 1634 if (input_dev) { 1635 input_unregister_device(input_dev); 1636 input_dev = NULL; /* so we don't try to free it below */ 1637 } 1638 err_protocol_disconnect: 1639 if (psmouse->disconnect) 1640 psmouse->disconnect(psmouse); 1641 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1642 err_close_serio: 1643 serio_close(serio); 1644 err_clear_drvdata: 1645 serio_set_drvdata(serio, NULL); 1646 err_free: 1647 input_free_device(input_dev); 1648 kfree(psmouse); 1649 1650 retval = error; 1651 goto out; 1652 } 1653 1654 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect) 1655 { 1656 struct psmouse *psmouse = serio_get_drvdata(serio); 1657 struct psmouse *parent = NULL; 1658 int (*reconnect_handler)(struct psmouse *); 1659 enum psmouse_type type; 1660 int rc = -1; 1661 1662 mutex_lock(&psmouse_mutex); 1663 1664 if (fast_reconnect) { 1665 reconnect_handler = psmouse->fast_reconnect; 1666 if (!reconnect_handler) { 1667 rc = -ENOENT; 1668 goto out_unlock; 1669 } 1670 } else { 1671 reconnect_handler = psmouse->reconnect; 1672 } 1673 1674 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1675 parent = serio_get_drvdata(serio->parent); 1676 psmouse_deactivate(parent); 1677 } 1678 1679 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1680 1681 if (reconnect_handler) { 1682 if (reconnect_handler(psmouse)) 1683 goto out; 1684 } else { 1685 psmouse_reset(psmouse); 1686 1687 if (psmouse_probe(psmouse) < 0) 1688 goto out; 1689 1690 type = psmouse_extensions(psmouse, psmouse_max_proto, false); 1691 if (psmouse->protocol->type != type) 1692 goto out; 1693 } 1694 1695 /* 1696 * OK, the device type (and capabilities) match the old one, 1697 * we can continue using it, complete initialization 1698 */ 1699 if (!psmouse->protocol->smbus_companion) { 1700 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1701 psmouse_initialize(psmouse); 1702 } 1703 1704 if (parent && parent->pt_activate) 1705 parent->pt_activate(parent); 1706 1707 /* 1708 * PS/2 devices having SMBus companions should stay disabled 1709 * on PS/2 side, in order to have SMBus part operable. 1710 */ 1711 if (!psmouse->protocol->smbus_companion) 1712 psmouse_activate(psmouse); 1713 1714 rc = 0; 1715 1716 out: 1717 /* If this is a pass-through port the parent waits to be activated */ 1718 if (parent) 1719 psmouse_activate(parent); 1720 1721 out_unlock: 1722 mutex_unlock(&psmouse_mutex); 1723 return rc; 1724 } 1725 1726 static int psmouse_reconnect(struct serio *serio) 1727 { 1728 return __psmouse_reconnect(serio, false); 1729 } 1730 1731 static int psmouse_fast_reconnect(struct serio *serio) 1732 { 1733 return __psmouse_reconnect(serio, true); 1734 } 1735 1736 static struct serio_device_id psmouse_serio_ids[] = { 1737 { 1738 .type = SERIO_8042, 1739 .proto = SERIO_ANY, 1740 .id = SERIO_ANY, 1741 .extra = SERIO_ANY, 1742 }, 1743 { 1744 .type = SERIO_PS_PSTHRU, 1745 .proto = SERIO_ANY, 1746 .id = SERIO_ANY, 1747 .extra = SERIO_ANY, 1748 }, 1749 { 0 } 1750 }; 1751 1752 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); 1753 1754 static struct serio_driver psmouse_drv = { 1755 .driver = { 1756 .name = "psmouse", 1757 }, 1758 .description = DRIVER_DESC, 1759 .id_table = psmouse_serio_ids, 1760 .interrupt = psmouse_interrupt, 1761 .connect = psmouse_connect, 1762 .reconnect = psmouse_reconnect, 1763 .fast_reconnect = psmouse_fast_reconnect, 1764 .disconnect = psmouse_disconnect, 1765 .cleanup = psmouse_cleanup, 1766 }; 1767 1768 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, 1769 char *buf) 1770 { 1771 struct serio *serio = to_serio_port(dev); 1772 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1773 struct psmouse *psmouse = serio_get_drvdata(serio); 1774 1775 if (psmouse->protocol->smbus_companion && 1776 devattr != &psmouse_attr_protocol.dattr) 1777 return -ENOENT; 1778 1779 return attr->show(psmouse, attr->data, buf); 1780 } 1781 1782 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, 1783 const char *buf, size_t count) 1784 { 1785 struct serio *serio = to_serio_port(dev); 1786 struct psmouse_attribute *attr = to_psmouse_attr(devattr); 1787 struct psmouse *psmouse, *parent = NULL; 1788 int retval; 1789 1790 retval = mutex_lock_interruptible(&psmouse_mutex); 1791 if (retval) 1792 goto out; 1793 1794 psmouse = serio_get_drvdata(serio); 1795 1796 if (psmouse->protocol->smbus_companion && 1797 devattr != &psmouse_attr_protocol.dattr) { 1798 retval = -ENOENT; 1799 goto out_unlock; 1800 } 1801 1802 if (attr->protect) { 1803 if (psmouse->state == PSMOUSE_IGNORE) { 1804 retval = -ENODEV; 1805 goto out_unlock; 1806 } 1807 1808 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1809 parent = serio_get_drvdata(serio->parent); 1810 psmouse_deactivate(parent); 1811 } 1812 1813 if (!psmouse->protocol->smbus_companion) 1814 psmouse_deactivate(psmouse); 1815 } 1816 1817 retval = attr->set(psmouse, attr->data, buf, count); 1818 1819 if (attr->protect) { 1820 if (retval != -ENODEV && !psmouse->protocol->smbus_companion) 1821 psmouse_activate(psmouse); 1822 1823 if (parent) 1824 psmouse_activate(parent); 1825 } 1826 1827 out_unlock: 1828 mutex_unlock(&psmouse_mutex); 1829 out: 1830 return retval; 1831 } 1832 1833 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) 1834 { 1835 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1836 1837 return sprintf(buf, "%u\n", *field); 1838 } 1839 1840 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) 1841 { 1842 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); 1843 unsigned int value; 1844 int err; 1845 1846 err = kstrtouint(buf, 10, &value); 1847 if (err) 1848 return err; 1849 1850 *field = value; 1851 1852 return count; 1853 } 1854 1855 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) 1856 { 1857 return sprintf(buf, "%s\n", psmouse->protocol->name); 1858 } 1859 1860 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1861 { 1862 struct serio *serio = psmouse->ps2dev.serio; 1863 struct psmouse *parent = NULL; 1864 struct input_dev *old_dev, *new_dev; 1865 const struct psmouse_protocol *proto, *old_proto; 1866 int error; 1867 int retry = 0; 1868 1869 proto = psmouse_protocol_by_name(buf, count); 1870 if (!proto) 1871 return -EINVAL; 1872 1873 if (psmouse->protocol == proto) 1874 return count; 1875 1876 new_dev = input_allocate_device(); 1877 if (!new_dev) 1878 return -ENOMEM; 1879 1880 while (!list_empty(&serio->children)) { 1881 if (++retry > 3) { 1882 psmouse_warn(psmouse, 1883 "failed to destroy children ports, protocol change aborted.\n"); 1884 input_free_device(new_dev); 1885 return -EIO; 1886 } 1887 1888 mutex_unlock(&psmouse_mutex); 1889 serio_unregister_child_port(serio); 1890 mutex_lock(&psmouse_mutex); 1891 1892 if (serio->drv != &psmouse_drv) { 1893 input_free_device(new_dev); 1894 return -ENODEV; 1895 } 1896 1897 if (psmouse->protocol == proto) { 1898 input_free_device(new_dev); 1899 return count; /* switched by other thread */ 1900 } 1901 } 1902 1903 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { 1904 parent = serio_get_drvdata(serio->parent); 1905 if (parent->pt_deactivate) 1906 parent->pt_deactivate(parent); 1907 } 1908 1909 old_dev = psmouse->dev; 1910 old_proto = psmouse->protocol; 1911 1912 if (psmouse->disconnect) 1913 psmouse->disconnect(psmouse); 1914 1915 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1916 1917 psmouse->dev = new_dev; 1918 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1919 1920 if (psmouse_switch_protocol(psmouse, proto) < 0) { 1921 psmouse_reset(psmouse); 1922 /* default to PSMOUSE_PS2 */ 1923 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); 1924 } 1925 1926 psmouse_initialize(psmouse); 1927 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1928 1929 if (psmouse->protocol->smbus_companion) { 1930 input_free_device(psmouse->dev); 1931 psmouse->dev = NULL; 1932 } else { 1933 error = input_register_device(psmouse->dev); 1934 if (error) { 1935 if (psmouse->disconnect) 1936 psmouse->disconnect(psmouse); 1937 1938 psmouse_set_state(psmouse, PSMOUSE_IGNORE); 1939 input_free_device(new_dev); 1940 psmouse->dev = old_dev; 1941 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 1942 psmouse_switch_protocol(psmouse, old_proto); 1943 psmouse_initialize(psmouse); 1944 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 1945 1946 return error; 1947 } 1948 } 1949 1950 if (old_dev) 1951 input_unregister_device(old_dev); 1952 1953 if (parent && parent->pt_activate) 1954 parent->pt_activate(parent); 1955 1956 return count; 1957 } 1958 1959 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1960 { 1961 unsigned int value; 1962 int err; 1963 1964 err = kstrtouint(buf, 10, &value); 1965 if (err) 1966 return err; 1967 1968 psmouse->set_rate(psmouse, value); 1969 return count; 1970 } 1971 1972 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) 1973 { 1974 unsigned int value; 1975 int err; 1976 1977 err = kstrtouint(buf, 10, &value); 1978 if (err) 1979 return err; 1980 1981 psmouse->set_resolution(psmouse, value); 1982 return count; 1983 } 1984 1985 1986 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp) 1987 { 1988 const struct psmouse_protocol *proto; 1989 1990 if (!val) 1991 return -EINVAL; 1992 1993 proto = psmouse_protocol_by_name(val, strlen(val)); 1994 1995 if (!proto || !proto->maxproto) 1996 return -EINVAL; 1997 1998 *((unsigned int *)kp->arg) = proto->type; 1999 2000 return 0; 2001 } 2002 2003 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp) 2004 { 2005 int type = *((unsigned int *)kp->arg); 2006 2007 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); 2008 } 2009 2010 static int __init psmouse_init(void) 2011 { 2012 int err; 2013 2014 lifebook_module_init(); 2015 synaptics_module_init(); 2016 hgpk_module_init(); 2017 2018 err = psmouse_smbus_module_init(); 2019 if (err) 2020 return err; 2021 2022 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); 2023 if (!kpsmoused_wq) { 2024 pr_err("failed to create kpsmoused workqueue\n"); 2025 err = -ENOMEM; 2026 goto err_smbus_exit; 2027 } 2028 2029 err = serio_register_driver(&psmouse_drv); 2030 if (err) 2031 goto err_destroy_wq; 2032 2033 return 0; 2034 2035 err_destroy_wq: 2036 destroy_workqueue(kpsmoused_wq); 2037 err_smbus_exit: 2038 psmouse_smbus_module_exit(); 2039 return err; 2040 } 2041 2042 static void __exit psmouse_exit(void) 2043 { 2044 serio_unregister_driver(&psmouse_drv); 2045 destroy_workqueue(kpsmoused_wq); 2046 psmouse_smbus_module_exit(); 2047 } 2048 2049 module_init(psmouse_init); 2050 module_exit(psmouse_exit); 2051