drivers/input/mouse/psmouse-base.c

   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
  38 #define DRIVER_DESC     "PS/2 mouse driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
  45 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
  46 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
  47 static struct kernel_param_ops param_ops_proto_abbrev = {
  48         .set = psmouse_set_maxproto,
  49         .get = psmouse_get_maxproto,
  50 };
  51 #define param_check_proto_abbrev(name, p)       __param_check(name, p, unsigned int)
  52 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
  53 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
  54
  55 static unsigned int psmouse_resolution = 200;
  56 module_param_named(resolution, psmouse_resolution, uint, 0644);
  57 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
  58
  59 static unsigned int psmouse_rate = 100;
  60 module_param_named(rate, psmouse_rate, uint, 0644);
  61 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
  62
  63 static bool psmouse_smartscroll = 1;
  64 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
  65 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
  66
  67 static unsigned int psmouse_resetafter = 5;
  68 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
  69 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
  70
  71 static unsigned int psmouse_resync_time;
  72 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
  73 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
  74
  75 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
  76                         NULL,
  77                         psmouse_attr_show_protocol, psmouse_attr_set_protocol);
  78 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
  79                         (void *) offsetof(struct psmouse, rate),
  80                         psmouse_show_int_attr, psmouse_attr_set_rate);
  81 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
  82                         (void *) offsetof(struct psmouse, resolution),
  83                         psmouse_show_int_attr, psmouse_attr_set_resolution);
  84 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
  85                         (void *) offsetof(struct psmouse, resetafter),
  86                         psmouse_show_int_attr, psmouse_set_int_attr);
  87 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
  88                         (void *) offsetof(struct psmouse, resync_time),
  89                         psmouse_show_int_attr, psmouse_set_int_attr);
  90
  91 static struct attribute *psmouse_attributes[] = {
  92         &psmouse_attr_protocol.dattr.attr,
  93         &psmouse_attr_rate.dattr.attr,
  94         &psmouse_attr_resolution.dattr.attr,
  95         &psmouse_attr_resetafter.dattr.attr,
  96         &psmouse_attr_resync_time.dattr.attr,
  97         NULL
  98 };
  99
 100 static struct attribute_group psmouse_attribute_group = {
 101         .attrs  = psmouse_attributes,
 102 };
 103
 104 /*
 105  * psmouse_mutex protects all operations changing state of mouse
 106  * (connecting, disconnecting, changing rate or resolution via
 107  * sysfs). We could use a per-device semaphore but since there
 108  * rarely more than one PS/2 mouse connected and since semaphore
 109  * is taken in "slow" paths it is not worth it.
 110  */
 111 static DEFINE_MUTEX(psmouse_mutex);
 112
 113 static struct workqueue_struct *kpsmoused_wq;
 114
 115 struct psmouse_protocol {
 116         enum psmouse_type type;
 117         bool maxproto;
 118         bool ignore_parity; /* Protocol should ignore parity errors from KBC */
 119         const char *name;
 120         const char *alias;
 121         int (*detect)(struct psmouse *, bool);
 122         int (*init)(struct psmouse *);
 123 };
 124
 125 /*
 126  * psmouse_process_byte() analyzes the PS/2 data stream and reports
 127  * relevant events to the input module once full packet has arrived.
 128  */
 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 /*
 139  * Full packet accumulated, process it
 140  */
 141
 142 /*
 143  * Scroll wheel on IntelliMice, scroll buttons on NetMice
 144  */
 145
 146         if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
 147                 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
 148
 149 /*
 150  * Scroll wheel and buttons on IntelliMouse Explorer
 151  */
 152
 153         if (psmouse->type == PSMOUSE_IMEX) {
 154                 switch (packet[3] & 0xC0) {
 155                 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
 156                         input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 157                         break;
 158                 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
 159                         input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 160                         break;
 161                 case 0x00:
 162                 case 0xC0:
 163                         input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
 164                         input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
 165                         input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
 166                         break;
 167                 }
 168         }
 169
 170 /*
 171  * Extra buttons on Genius NewNet 3D
 172  */
 173
 174         if (psmouse->type == PSMOUSE_GENPS) {
 175                 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
 176                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
 177         }
 178
 179 /*
 180  * Extra button on ThinkingMouse
 181  */
 182         if (psmouse->type == PSMOUSE_THINKPS) {
 183                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
 184                 /* Without this bit of weirdness moving up gives wildly high Y changes. */
 185                 packet[1] |= (packet[0] & 0x40) << 1;
 186         }
 187
 188 /*
 189  * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
 190  * byte.
 191  */
 192         if (psmouse->type == PSMOUSE_CORTRON) {
 193                 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
 194                 packet[0] |= 0x08;
 195         }
 196
 197 /*
 198  * Generic PS/2 Mouse
 199  */
 200
 201         input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
 202         input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 203         input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);
 204
 205         input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
 206         input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
 207
 208         input_sync(dev);
 209
 210         return PSMOUSE_FULL_PACKET;
 211 }
 212
 213 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
 214                 unsigned long delay)
 215 {
 216         queue_delayed_work(kpsmoused_wq, work, delay);
 217 }
 218
 219 /*
 220  * __psmouse_set_state() sets new psmouse state and resets all flags.
 221  */
 222
 223 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 224 {
 225         psmouse->state = new_state;
 226         psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
 227         psmouse->ps2dev.flags = 0;
 228         psmouse->last = jiffies;
 229 }
 230
 231
 232 /*
 233  * psmouse_set_state() sets new psmouse state and resets all flags and
 234  * counters while holding serio lock so fighting with interrupt handler
 235  * is not a concern.
 236  */
 237
 238 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 239 {
 240         serio_pause_rx(psmouse->ps2dev.serio);
 241         __psmouse_set_state(psmouse, new_state);
 242         serio_continue_rx(psmouse->ps2dev.serio);
 243 }
 244
 245 /*
 246  * psmouse_handle_byte() processes one byte of the input data stream
 247  * by calling corresponding protocol handler.
 248  */
 249
 250 static int psmouse_handle_byte(struct psmouse *psmouse)
 251 {
 252         psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
 253
 254         switch (rc) {
 255         case PSMOUSE_BAD_DATA:
 256                 if (psmouse->state == PSMOUSE_ACTIVATED) {
 257                         psmouse_warn(psmouse,
 258                                      "%s at %s lost sync at byte %d\n",
 259                                      psmouse->name, psmouse->phys,
 260                                      psmouse->pktcnt);
 261                         if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
 262                                 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 263                                 psmouse_notice(psmouse,
 264                                                 "issuing reconnect request\n");
 265                                 serio_reconnect(psmouse->ps2dev.serio);
 266                                 return -1;
 267                         }
 268                 }
 269                 psmouse->pktcnt = 0;
 270                 break;
 271
 272         case PSMOUSE_FULL_PACKET:
 273                 psmouse->pktcnt = 0;
 274                 if (psmouse->out_of_sync_cnt) {
 275                         psmouse->out_of_sync_cnt = 0;
 276                         psmouse_notice(psmouse,
 277                                         "%s at %s - driver resynced.\n",
 278                                         psmouse->name, psmouse->phys);
 279                 }
 280                 break;
 281
 282         case PSMOUSE_GOOD_DATA:
 283                 break;
 284         }
 285         return 0;
 286 }
 287
 288 /*
 289  * psmouse_interrupt() handles incoming characters, either passing them
 290  * for normal processing or gathering them as command response.
 291  */
 292
 293 static irqreturn_t psmouse_interrupt(struct serio *serio,
 294                 unsigned char data, unsigned int flags)
 295 {
 296         struct psmouse *psmouse = serio_get_drvdata(serio);
 297
 298         if (psmouse->state == PSMOUSE_IGNORE)
 299                 goto out;
 300
 301         if (unlikely((flags & SERIO_TIMEOUT) ||
 302                      ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
 303
 304                 if (psmouse->state == PSMOUSE_ACTIVATED)
 305                         psmouse_warn(psmouse,
 306                                      "bad data from KBC -%s%s\n",
 307                                      flags & SERIO_TIMEOUT ? " timeout" : "",
 308                                      flags & SERIO_PARITY ? " bad parity" : "");
 309                 ps2_cmd_aborted(&psmouse->ps2dev);
 310                 goto out;
 311         }
 312
 313         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
 314                 if  (ps2_handle_ack(&psmouse->ps2dev, data))
 315                         goto out;
 316
 317         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
 318                 if  (ps2_handle_response(&psmouse->ps2dev, data))
 319                         goto out;
 320
 321         if (psmouse->state <= PSMOUSE_RESYNCING)
 322                 goto out;
 323
 324         if (psmouse->state == PSMOUSE_ACTIVATED &&
 325             psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
 326                 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
 327                              psmouse->name, psmouse->phys, psmouse->pktcnt);
 328                 psmouse->badbyte = psmouse->packet[0];
 329                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 330                 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
 331                 goto out;
 332         }
 333
 334         psmouse->packet[psmouse->pktcnt++] = data;
 335 /*
 336  * Check if this is a new device announcement (0xAA 0x00)
 337  */
 338         if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
 339                 if (psmouse->pktcnt == 1) {
 340                         psmouse->last = jiffies;
 341                         goto out;
 342                 }
 343
 344                 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
 345                     (psmouse->type == PSMOUSE_HGPK &&
 346                      psmouse->packet[1] == PSMOUSE_RET_BAT)) {
 347                         __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 348                         serio_reconnect(serio);
 349                         goto out;
 350                 }
 351 /*
 352  * Not a new device, try processing first byte normally
 353  */
 354                 psmouse->pktcnt = 1;
 355                 if (psmouse_handle_byte(psmouse))
 356                         goto out;
 357
 358                 psmouse->packet[psmouse->pktcnt++] = data;
 359         }
 360
 361 /*
 362  * See if we need to force resync because mouse was idle for too long
 363  */
 364         if (psmouse->state == PSMOUSE_ACTIVATED &&
 365             psmouse->pktcnt == 1 && psmouse->resync_time &&
 366             time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
 367                 psmouse->badbyte = psmouse->packet[0];
 368                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 369                 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
 370                 goto out;
 371         }
 372
 373         psmouse->last = jiffies;
 374         psmouse_handle_byte(psmouse);
 375
 376  out:
 377         return IRQ_HANDLED;
 378 }
 379
 380
 381 /*
 382  * psmouse_sliced_command() sends an extended PS/2 command to the mouse
 383  * using sliced syntax, understood by advanced devices, such as Logitech
 384  * or Synaptics touchpads. The command is encoded as:
 385  * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
 386  * is the command.
 387  */
 388 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
 389 {
 390         int i;
 391
 392         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
 393                 return -1;
 394
 395         for (i = 6; i >= 0; i -= 2) {
 396                 unsigned char d = (command >> i) & 3;
 397                 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
 398                         return -1;
 399         }
 400
 401         return 0;
 402 }
 403
 404
 405 /*
 406  * psmouse_reset() resets the mouse into power-on state.
 407  */
 408 int psmouse_reset(struct psmouse *psmouse)
 409 {
 410         unsigned char param[2];
 411
 412         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
 413                 return -1;
 414
 415         if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
 416                 return -1;
 417
 418         return 0;
 419 }
 420
 421 /*
 422  * Here we set the mouse resolution.
 423  */
 424
 425 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 426 {
 427         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
 428         unsigned char p;
 429
 430         if (resolution == 0 || resolution > 200)
 431                 resolution = 200;
 432
 433         p = params[resolution / 50];
 434         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
 435         psmouse->resolution = 25 << p;
 436 }
 437
 438 /*
 439  * Here we set the mouse report rate.
 440  */
 441
 442 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
 443 {
 444         static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
 445         unsigned char r;
 446         int i = 0;
 447
 448         while (rates[i] > rate) i++;
 449         r = rates[i];
 450         ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
 451         psmouse->rate = r;
 452 }
 453
 454 /*
 455  * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
 456  */
 457
 458 static int psmouse_poll(struct psmouse *psmouse)
 459 {
 460         return ps2_command(&psmouse->ps2dev, psmouse->packet,
 461                            PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
 462 }
 463
 464
 465 /*
 466  * Genius NetMouse magic init.
 467  */
 468 static int genius_detect(struct psmouse *psmouse, bool set_properties)
 469 {
 470         struct ps2dev *ps2dev = &psmouse->ps2dev;
 471         unsigned char param[4];
 472
 473         param[0] = 3;
 474         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 475         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 476         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 477         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 478         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 479
 480         if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
 481                 return -1;
 482
 483         if (set_properties) {
 484                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 485                 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
 486                 __set_bit(BTN_SIDE, psmouse->dev->keybit);
 487                 __set_bit(REL_WHEEL, psmouse->dev->relbit);
 488
 489                 psmouse->vendor = "Genius";
 490                 psmouse->name = "Mouse";
 491                 psmouse->pktsize = 4;
 492         }
 493
 494         return 0;
 495 }
 496
 497 /*
 498  * IntelliMouse magic init.
 499  */
 500 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
 501 {
 502         struct ps2dev *ps2dev = &psmouse->ps2dev;
 503         unsigned char param[2];
 504
 505         param[0] = 200;
 506         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 507         param[0] = 100;
 508         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 509         param[0] =  80;
 510         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 511         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 512
 513         if (param[0] != 3)
 514                 return -1;
 515
 516         if (set_properties) {
 517                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 518                 __set_bit(REL_WHEEL, psmouse->dev->relbit);
 519
 520                 if (!psmouse->vendor)
 521                         psmouse->vendor = "Generic";
 522                 if (!psmouse->name)
 523                         psmouse->name = "Wheel Mouse";
 524                 psmouse->pktsize = 4;
 525         }
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * Try IntelliMouse/Explorer magic init.
 532  */
 533 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
 534 {
 535         struct ps2dev *ps2dev = &psmouse->ps2dev;
 536         unsigned char param[2];
 537
 538         intellimouse_detect(psmouse, 0);
 539
 540         param[0] = 200;
 541         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 542         param[0] = 200;
 543         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 544         param[0] =  80;
 545         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 546         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 547
 548         if (param[0] != 4)
 549                 return -1;
 550
 551 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
 552         param[0] = 200;
 553         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 554         param[0] =  80;
 555         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 556         param[0] =  40;
 557         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 558
 559         if (set_properties) {
 560                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 561                 __set_bit(REL_WHEEL, psmouse->dev->relbit);
 562                 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
 563                 __set_bit(BTN_SIDE, psmouse->dev->keybit);
 564                 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
 565
 566                 if (!psmouse->vendor)
 567                         psmouse->vendor = "Generic";
 568                 if (!psmouse->name)
 569                         psmouse->name = "Explorer Mouse";
 570                 psmouse->pktsize = 4;
 571         }
 572
 573         return 0;
 574 }
 575
 576 /*
 577  * Kensington ThinkingMouse / ExpertMouse magic init.
 578  */
 579 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
 580 {
 581         struct ps2dev *ps2dev = &psmouse->ps2dev;
 582         unsigned char param[2];
 583         static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
 584         int i;
 585
 586         param[0] = 10;
 587         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 588         param[0] = 0;
 589         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 590         for (i = 0; i < ARRAY_SIZE(seq); i++) {
 591                 param[0] = seq[i];
 592                 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 593         }
 594         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 595
 596         if (param[0] != 2)
 597                 return -1;
 598
 599         if (set_properties) {
 600                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 601                 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
 602
 603                 psmouse->vendor = "Kensington";
 604                 psmouse->name = "ThinkingMouse";
 605         }
 606
 607         return 0;
 608 }
 609
 610 /*
 611  * Bare PS/2 protocol "detection". Always succeeds.
 612  */
 613 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
 614 {
 615         if (set_properties) {
 616                 if (!psmouse->vendor)
 617                         psmouse->vendor = "Generic";
 618                 if (!psmouse->name)
 619                         psmouse->name = "Mouse";
 620
 621 /*
 622  * We have no way of figuring true number of buttons so let's
 623  * assume that the device has 3.
 624  */
 625                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 626         }
 627
 628         return 0;
 629 }
 630
 631 /*
 632  * Cortron PS/2 protocol detection. There's no special way to detect it, so it
 633  * must be forced by sysfs protocol writing.
 634  */
 635 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
 636 {
 637         if (set_properties) {
 638                 psmouse->vendor = "Cortron";
 639                 psmouse->name = "PS/2 Trackball";
 640
 641                 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 642                 __set_bit(BTN_SIDE, psmouse->dev->keybit);
 643         }
 644
 645         return 0;
 646 }
 647
 648 /*
 649  * Apply default settings to the psmouse structure. Most of them will
 650  * be overridden by individual protocol initialization routines.
 651  */
 652
 653 static void psmouse_apply_defaults(struct psmouse *psmouse)
 654 {
 655         struct input_dev *input_dev = psmouse->dev;
 656
 657         memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
 658         memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
 659         memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
 660         memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
 661         memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
 662
 663         __set_bit(EV_KEY, input_dev->evbit);
 664         __set_bit(EV_REL, input_dev->evbit);
 665
 666         __set_bit(BTN_LEFT, input_dev->keybit);
 667         __set_bit(BTN_RIGHT, input_dev->keybit);
 668
 669         __set_bit(REL_X, input_dev->relbit);
 670         __set_bit(REL_Y, input_dev->relbit);
 671
 672         psmouse->set_rate = psmouse_set_rate;
 673         psmouse->set_resolution = psmouse_set_resolution;
 674         psmouse->poll = psmouse_poll;
 675         psmouse->protocol_handler = psmouse_process_byte;
 676         psmouse->pktsize = 3;
 677         psmouse->reconnect = NULL;
 678         psmouse->disconnect = NULL;
 679         psmouse->cleanup = NULL;
 680         psmouse->pt_activate = NULL;
 681         psmouse->pt_deactivate = NULL;
 682 }
 683
 684 /*
 685  * Apply default settings to the psmouse structure and call specified
 686  * protocol detection or initialization routine.
 687  */
 688 static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
 689                                            bool set_properties),
 690                              struct psmouse *psmouse, bool set_properties)
 691 {
 692         if (set_properties)
 693                 psmouse_apply_defaults(psmouse);
 694
 695         return detect(psmouse, set_properties);
 696 }
 697
 698 /*
 699  * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
 700  * the mouse may have.
 701  */
 702
 703 static int psmouse_extensions(struct psmouse *psmouse,
 704                               unsigned int max_proto, bool set_properties)
 705 {
 706         bool synaptics_hardware = false;
 707
 708 /*
 709  * We always check for lifebook because it does not disturb mouse
 710  * (it only checks DMI information).
 711  */
 712         if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
 713                 if (max_proto > PSMOUSE_IMEX) {
 714                         if (!set_properties || lifebook_init(psmouse) == 0)
 715                                 return PSMOUSE_LIFEBOOK;
 716                 }
 717         }
 718
 719 /*
 720  * Try Kensington ThinkingMouse (we try first, because synaptics probe
 721  * upsets the thinkingmouse).
 722  */
 723
 724         if (max_proto > PSMOUSE_IMEX &&
 725             psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
 726                 return PSMOUSE_THINKPS;
 727         }
 728
 729 /*
 730  * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
 731  * support is disabled in config - we need to know if it is synaptics so we
 732  * can reset it properly after probing for intellimouse.
 733  */
 734         if (max_proto > PSMOUSE_PS2 &&
 735             psmouse_do_detect(synaptics_detect, psmouse, set_properties) == 0) {
 736                 synaptics_hardware = true;
 737
 738                 if (max_proto > PSMOUSE_IMEX) {
 739 /*
 740  * Try activating protocol, but check if support is enabled first, since
 741  * we try detecting Synaptics even when protocol is disabled.
 742  */
 743                         if (synaptics_supported() &&
 744                             (!set_properties || synaptics_init(psmouse) == 0)) {
 745                                 return PSMOUSE_SYNAPTICS;
 746                         }
 747
 748 /*
 749  * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
 750  * Unfortunately Logitech/Genius probes confuse some firmware versions so
 751  * we'll have to skip them.
 752  */
 753                         max_proto = PSMOUSE_IMEX;
 754                 }
 755 /*
 756  * Make sure that touchpad is in relative mode, gestures (taps) are enabled
 757  */
 758                 synaptics_reset(psmouse);
 759         }
 760
 761 /*
 762  * Try ALPS TouchPad
 763  */
 764         if (max_proto > PSMOUSE_IMEX) {
 765                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 766                 if (psmouse_do_detect(alps_detect,
 767                                       psmouse, set_properties) == 0) {
 768                         if (!set_properties || alps_init(psmouse) == 0)
 769                                 return PSMOUSE_ALPS;
 770 /*
 771  * Init failed, try basic relative protocols
 772  */
 773                         max_proto = PSMOUSE_IMEX;
 774                 }
 775         }
 776
 777 /*
 778  * Try OLPC HGPK touchpad.
 779  */
 780         if (max_proto > PSMOUSE_IMEX &&
 781             psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
 782                 if (!set_properties || hgpk_init(psmouse) == 0)
 783                         return PSMOUSE_HGPK;
 784 /*
 785  * Init failed, try basic relative protocols
 786  */
 787                 max_proto = PSMOUSE_IMEX;
 788         }
 789
 790 /*
 791  * Try Elantech touchpad.
 792  */
 793         if (max_proto > PSMOUSE_IMEX &&
 794             psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
 795                 if (!set_properties || elantech_init(psmouse) == 0)
 796                         return PSMOUSE_ELANTECH;
 797 /*
 798  * Init failed, try basic relative protocols
 799  */
 800                 max_proto = PSMOUSE_IMEX;
 801         }
 802
 803         if (max_proto > PSMOUSE_IMEX) {
 804                 if (psmouse_do_detect(genius_detect,
 805                                       psmouse, set_properties) == 0)
 806                         return PSMOUSE_GENPS;
 807
 808                 if (psmouse_do_detect(ps2pp_init,
 809                                       psmouse, set_properties) == 0)
 810                         return PSMOUSE_PS2PP;
 811
 812                 if (psmouse_do_detect(trackpoint_detect,
 813                                       psmouse, set_properties) == 0)
 814                         return PSMOUSE_TRACKPOINT;
 815
 816                 if (psmouse_do_detect(touchkit_ps2_detect,
 817                                       psmouse, set_properties) == 0)
 818                         return PSMOUSE_TOUCHKIT_PS2;
 819         }
 820
 821 /*
 822  * Try Finger Sensing Pad. We do it here because its probe upsets
 823  * Trackpoint devices (causing TP_READ_ID command to time out).
 824  */
 825         if (max_proto > PSMOUSE_IMEX) {
 826                 if (psmouse_do_detect(fsp_detect,
 827                                       psmouse, set_properties) == 0) {
 828                         if (!set_properties || fsp_init(psmouse) == 0)
 829                                 return PSMOUSE_FSP;
 830 /*
 831  * Init failed, try basic relative protocols
 832  */
 833                         max_proto = PSMOUSE_IMEX;
 834                 }
 835         }
 836
 837 /*
 838  * Reset to defaults in case the device got confused by extended
 839  * protocol probes. Note that we follow up with full reset because
 840  * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
 841  */
 842         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 843         psmouse_reset(psmouse);
 844
 845         if (max_proto >= PSMOUSE_IMEX &&
 846             psmouse_do_detect(im_explorer_detect,
 847                               psmouse, set_properties) == 0) {
 848                 return PSMOUSE_IMEX;
 849         }
 850
 851         if (max_proto >= PSMOUSE_IMPS &&
 852             psmouse_do_detect(intellimouse_detect,
 853                               psmouse, set_properties) == 0) {
 854                 return PSMOUSE_IMPS;
 855         }
 856
 857 /*
 858  * Okay, all failed, we have a standard mouse here. The number of the buttons
 859  * is still a question, though. We assume 3.
 860  */
 861         psmouse_do_detect(ps2bare_detect, psmouse, set_properties);
 862
 863         if (synaptics_hardware) {
 864 /*
 865  * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
 866  * We need to reset the touchpad because if there is a track point on the
 867  * pass through port it could get disabled while probing for protocol
 868  * extensions.
 869  */
 870                 psmouse_reset(psmouse);
 871         }
 872
 873         return PSMOUSE_PS2;
 874 }
 875
 876 static const struct psmouse_protocol psmouse_protocols[] = {
 877         {
 878                 .type           = PSMOUSE_PS2,
 879                 .name           = "PS/2",
 880                 .alias          = "bare",
 881                 .maxproto       = true,
 882                 .ignore_parity  = true,
 883                 .detect         = ps2bare_detect,
 884         },
 885 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 886         {
 887                 .type           = PSMOUSE_PS2PP,
 888                 .name           = "PS2++",
 889                 .alias          = "logitech",
 890                 .detect         = ps2pp_init,
 891         },
 892 #endif
 893         {
 894                 .type           = PSMOUSE_THINKPS,
 895                 .name           = "ThinkPS/2",
 896                 .alias          = "thinkps",
 897                 .detect         = thinking_detect,
 898         },
 899         {
 900                 .type           = PSMOUSE_GENPS,
 901                 .name           = "GenPS/2",
 902                 .alias          = "genius",
 903                 .detect         = genius_detect,
 904         },
 905         {
 906                 .type           = PSMOUSE_IMPS,
 907                 .name           = "ImPS/2",
 908                 .alias          = "imps",
 909                 .maxproto       = true,
 910                 .ignore_parity  = true,
 911                 .detect         = intellimouse_detect,
 912         },
 913         {
 914                 .type           = PSMOUSE_IMEX,
 915                 .name           = "ImExPS/2",
 916                 .alias          = "exps",
 917                 .maxproto       = true,
 918                 .ignore_parity  = true,
 919                 .detect         = im_explorer_detect,
 920         },
 921 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 922         {
 923                 .type           = PSMOUSE_SYNAPTICS,
 924                 .name           = "SynPS/2",
 925                 .alias          = "synaptics",
 926                 .detect         = synaptics_detect,
 927                 .init           = synaptics_init,
 928         },
 929         {
 930                 .type           = PSMOUSE_SYNAPTICS_RELATIVE,
 931                 .name           = "SynRelPS/2",
 932                 .alias          = "synaptics-relative",
 933                 .detect         = synaptics_detect,
 934                 .init           = synaptics_init_relative,
 935         },
 936 #endif
 937 #ifdef CONFIG_MOUSE_PS2_ALPS
 938         {
 939                 .type           = PSMOUSE_ALPS,
 940                 .name           = "AlpsPS/2",
 941                 .alias          = "alps",
 942                 .detect         = alps_detect,
 943                 .init           = alps_init,
 944         },
 945 #endif
 946 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
 947         {
 948                 .type           = PSMOUSE_LIFEBOOK,
 949                 .name           = "LBPS/2",
 950                 .alias          = "lifebook",
 951                 .init           = lifebook_init,
 952         },
 953 #endif
 954 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 955         {
 956                 .type           = PSMOUSE_TRACKPOINT,
 957                 .name           = "TPPS/2",
 958                 .alias          = "trackpoint",
 959                 .detect         = trackpoint_detect,
 960         },
 961 #endif
 962 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 963         {
 964                 .type           = PSMOUSE_TOUCHKIT_PS2,
 965                 .name           = "touchkitPS/2",
 966                 .alias          = "touchkit",
 967                 .detect         = touchkit_ps2_detect,
 968         },
 969 #endif
 970 #ifdef CONFIG_MOUSE_PS2_OLPC
 971         {
 972                 .type           = PSMOUSE_HGPK,
 973                 .name           = "OLPC HGPK",
 974                 .alias          = "hgpk",
 975                 .detect         = hgpk_detect,
 976         },
 977 #endif
 978 #ifdef CONFIG_MOUSE_PS2_ELANTECH
 979         {
 980                 .type           = PSMOUSE_ELANTECH,
 981                 .name           = "ETPS/2",
 982                 .alias          = "elantech",
 983                 .detect         = elantech_detect,
 984                 .init           = elantech_init,
 985         },
 986 #endif
 987 #ifdef CONFIG_MOUSE_PS2_SENTELIC
 988         {
 989                 .type           = PSMOUSE_FSP,
 990                 .name           = "FSPPS/2",
 991                 .alias          = "fsp",
 992                 .detect         = fsp_detect,
 993                 .init           = fsp_init,
 994         },
 995 #endif
 996         {
 997                 .type           = PSMOUSE_CORTRON,
 998                 .name           = "CortronPS/2",
 999                 .alias          = "cortps",
1000                 .detect         = cortron_detect,
1001         },
1002         {
1003                 .type           = PSMOUSE_AUTO,
1004                 .name           = "auto",
1005                 .alias          = "any",
1006                 .maxproto       = true,
1007         },
1008 };
1009
1010 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
1011 {
1012         int i;
1013
1014         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
1015                 if (psmouse_protocols[i].type == type)
1016                         return &psmouse_protocols[i];
1017
1018         WARN_ON(1);
1019         return &psmouse_protocols[0];
1020 }
1021
1022 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
1023 {
1024         const struct psmouse_protocol *p;
1025         int i;
1026
1027         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
1028                 p = &psmouse_protocols[i];
1029
1030                 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
1031                     (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
1032                         return &psmouse_protocols[i];
1033         }
1034
1035         return NULL;
1036 }
1037
1038
1039 /*
1040  * psmouse_probe() probes for a PS/2 mouse.
1041  */
1042
1043 static int psmouse_probe(struct psmouse *psmouse)
1044 {
1045         struct ps2dev *ps2dev = &psmouse->ps2dev;
1046         unsigned char param[2];
1047
1048 /*
1049  * First, we check if it's a mouse. It should send 0x00 or 0x03
1050  * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1051  * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
1052  * ID queries, probably due to a firmware bug.
1053  */
1054
1055         param[0] = 0xa5;
1056         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) {
1057                 /*
1058                  * Reprobe the device if it did not respond to the GETID
1059                  * command. Before retry, additional dummy command is sent
1060                  * to clear the 'RESEND' response if exists.
1061                  */
1062                 psmouse_warn(psmouse, "GETID probe failed, retrying...\n");
1063                 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
1064                 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1065                         return -1;
1066         }
1067
1068         if (param[0] != 0x00 && param[0] != 0x03 &&
1069             param[0] != 0x04 && param[0] != 0xff)
1070                 return -1;
1071
1072 /*
1073  * Then we reset and disable the mouse so that it doesn't generate events.
1074  */
1075
1076         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1077                 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1078                              ps2dev->serio->phys);
1079
1080         return 0;
1081 }
1082
1083 /*
1084  * psmouse_initialize() initializes the mouse to a sane state.
1085  */
1086
1087 static void psmouse_initialize(struct psmouse *psmouse)
1088 {
1089 /*
1090  * We set the mouse report rate, resolution and scaling.
1091  */
1092
1093         if (psmouse_max_proto != PSMOUSE_PS2) {
1094                 psmouse->set_rate(psmouse, psmouse->rate);
1095                 psmouse->set_resolution(psmouse, psmouse->resolution);
1096                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
1097         }
1098 }
1099
1100 /*
1101  * psmouse_activate() enables the mouse so that we get motion reports from it.
1102  */
1103
1104 int psmouse_activate(struct psmouse *psmouse)
1105 {
1106         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1107                 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1108                              psmouse->ps2dev.serio->phys);
1109                 return -1;
1110         }
1111
1112         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1113         return 0;
1114 }
1115
1116 /*
1117  * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
1118  * reports from it unless we explicitly request it.
1119  */
1120
1121 int psmouse_deactivate(struct psmouse *psmouse)
1122 {
1123         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1124                 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1125                              psmouse->ps2dev.serio->phys);
1126                 return -1;
1127         }
1128
1129         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1130         return 0;
1131 }
1132
1133
1134 /*
1135  * psmouse_resync() attempts to re-validate current protocol.
1136  */
1137
1138 static void psmouse_resync(struct work_struct *work)
1139 {
1140         struct psmouse *parent = NULL, *psmouse =
1141                 container_of(work, struct psmouse, resync_work.work);
1142         struct serio *serio = psmouse->ps2dev.serio;
1143         psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1144         bool failed = false, enabled = false;
1145         int i;
1146
1147         mutex_lock(&psmouse_mutex);
1148
1149         if (psmouse->state != PSMOUSE_RESYNCING)
1150                 goto out;
1151
1152         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1153                 parent = serio_get_drvdata(serio->parent);
1154                 psmouse_deactivate(parent);
1155         }
1156
1157 /*
1158  * Some mice don't ACK commands sent while they are in the middle of
1159  * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1160  * instead of ps2_command() which would wait for 200ms for an ACK
1161  * that may never come.
1162  * As an additional quirk ALPS touchpads may not only forget to ACK
1163  * disable command but will stop reporting taps, so if we see that
1164  * mouse at least once ACKs disable we will do full reconnect if ACK
1165  * is missing.
1166  */
1167         psmouse->num_resyncs++;
1168
1169         if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1170                 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1171                         failed = true;
1172         } else
1173                 psmouse->acks_disable_command = true;
1174
1175 /*
1176  * Poll the mouse. If it was reset the packet will be shorter than
1177  * psmouse->pktsize and ps2_command will fail. We do not expect and
1178  * do not handle scenario when mouse "upgrades" its protocol while
1179  * disconnected since it would require additional delay. If we ever
1180  * see a mouse that does it we'll adjust the code.
1181  */
1182         if (!failed) {
1183                 if (psmouse->poll(psmouse))
1184                         failed = true;
1185                 else {
1186                         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1187                         for (i = 0; i < psmouse->pktsize; i++) {
1188                                 psmouse->pktcnt++;
1189                                 rc = psmouse->protocol_handler(psmouse);
1190                                 if (rc != PSMOUSE_GOOD_DATA)
1191                                         break;
1192                         }
1193                         if (rc != PSMOUSE_FULL_PACKET)
1194                                 failed = true;
1195                         psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1196                 }
1197         }
1198 /*
1199  * Now try to enable mouse. We try to do that even if poll failed and also
1200  * repeat our attempts 5 times, otherwise we may be left out with disabled
1201  * mouse.
1202  */
1203         for (i = 0; i < 5; i++) {
1204                 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1205                         enabled = true;
1206                         break;
1207                 }
1208                 msleep(200);
1209         }
1210
1211         if (!enabled) {
1212                 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1213                              psmouse->ps2dev.serio->phys);
1214                 failed = true;
1215         }
1216
1217         if (failed) {
1218                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1219                 psmouse_info(psmouse,
1220                              "resync failed, issuing reconnect request\n");
1221                 serio_reconnect(serio);
1222         } else
1223                 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1224
1225         if (parent)
1226                 psmouse_activate(parent);
1227  out:
1228         mutex_unlock(&psmouse_mutex);
1229 }
1230
1231 /*
1232  * psmouse_cleanup() resets the mouse into power-on state.
1233  */
1234
1235 static void psmouse_cleanup(struct serio *serio)
1236 {
1237         struct psmouse *psmouse = serio_get_drvdata(serio);
1238         struct psmouse *parent = NULL;
1239
1240         mutex_lock(&psmouse_mutex);
1241
1242         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1243                 parent = serio_get_drvdata(serio->parent);
1244                 psmouse_deactivate(parent);
1245         }
1246
1247         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1248
1249         /*
1250          * Disable stream mode so cleanup routine can proceed undisturbed.
1251          */
1252         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1253                 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1254                              psmouse->ps2dev.serio->phys);
1255
1256         if (psmouse->cleanup)
1257                 psmouse->cleanup(psmouse);
1258
1259 /*
1260  * Reset the mouse to defaults (bare PS/2 protocol).
1261  */
1262         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1263
1264 /*
1265  * Some boxes, such as HP nx7400, get terribly confused if mouse
1266  * is not fully enabled before suspending/shutting down.
1267  */
1268         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1269
1270         if (parent) {
1271                 if (parent->pt_deactivate)
1272                         parent->pt_deactivate(parent);
1273
1274                 psmouse_activate(parent);
1275         }
1276
1277         mutex_unlock(&psmouse_mutex);
1278 }
1279
1280 /*
1281  * psmouse_disconnect() closes and frees.
1282  */
1283
1284 static void psmouse_disconnect(struct serio *serio)
1285 {
1286         struct psmouse *psmouse, *parent = NULL;
1287
1288         psmouse = serio_get_drvdata(serio);
1289
1290         sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1291
1292         mutex_lock(&psmouse_mutex);
1293
1294         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1295
1296         /* make sure we don't have a resync in progress */
1297         mutex_unlock(&psmouse_mutex);
1298         flush_workqueue(kpsmoused_wq);
1299         mutex_lock(&psmouse_mutex);
1300
1301         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1302                 parent = serio_get_drvdata(serio->parent);
1303                 psmouse_deactivate(parent);
1304         }
1305
1306         if (psmouse->disconnect)
1307                 psmouse->disconnect(psmouse);
1308
1309         if (parent && parent->pt_deactivate)
1310                 parent->pt_deactivate(parent);
1311
1312         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1313
1314         serio_close(serio);
1315         serio_set_drvdata(serio, NULL);
1316         input_unregister_device(psmouse->dev);
1317         kfree(psmouse);
1318
1319         if (parent)
1320                 psmouse_activate(parent);
1321
1322         mutex_unlock(&psmouse_mutex);
1323 }
1324
1325 static int psmouse_switch_protocol(struct psmouse *psmouse,
1326                                    const struct psmouse_protocol *proto)
1327 {
1328         const struct psmouse_protocol *selected_proto;
1329         struct input_dev *input_dev = psmouse->dev;
1330
1331         input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1332
1333         if (proto && (proto->detect || proto->init)) {
1334                 psmouse_apply_defaults(psmouse);
1335
1336                 if (proto->detect && proto->detect(psmouse, true) < 0)
1337                         return -1;
1338
1339                 if (proto->init && proto->init(psmouse) < 0)
1340                         return -1;
1341
1342                 psmouse->type = proto->type;
1343                 selected_proto = proto;
1344         } else {
1345                 psmouse->type = psmouse_extensions(psmouse,
1346                                                    psmouse_max_proto, true);
1347                 selected_proto = psmouse_protocol_by_type(psmouse->type);
1348         }
1349
1350         psmouse->ignore_parity = selected_proto->ignore_parity;
1351
1352         /*
1353          * If mouse's packet size is 3 there is no point in polling the
1354          * device in hopes to detect protocol reset - we won't get less
1355          * than 3 bytes response anyhow.
1356          */
1357         if (psmouse->pktsize == 3)
1358                 psmouse->resync_time = 0;
1359
1360         /*
1361          * Some smart KVMs fake response to POLL command returning just
1362          * 3 bytes and messing up our resync logic, so if initial poll
1363          * fails we won't try polling the device anymore. Hopefully
1364          * such KVM will maintain initially selected protocol.
1365          */
1366         if (psmouse->resync_time && psmouse->poll(psmouse))
1367                 psmouse->resync_time = 0;
1368
1369         snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1370                  selected_proto->name, psmouse->vendor, psmouse->name);
1371
1372         input_dev->name = psmouse->devname;
1373         input_dev->phys = psmouse->phys;
1374         input_dev->id.bustype = BUS_I8042;
1375         input_dev->id.vendor = 0x0002;
1376         input_dev->id.product = psmouse->type;
1377         input_dev->id.version = psmouse->model;
1378
1379         return 0;
1380 }
1381
1382 /*
1383  * psmouse_connect() is a callback from the serio module when
1384  * an unhandled serio port is found.
1385  */
1386 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1387 {
1388         struct psmouse *psmouse, *parent = NULL;
1389         struct input_dev *input_dev;
1390         int retval = 0, error = -ENOMEM;
1391
1392         mutex_lock(&psmouse_mutex);
1393
1394         /*
1395          * If this is a pass-through port deactivate parent so the device
1396          * connected to this port can be successfully identified
1397          */
1398         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1399                 parent = serio_get_drvdata(serio->parent);
1400                 psmouse_deactivate(parent);
1401         }
1402
1403         psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1404         input_dev = input_allocate_device();
1405         if (!psmouse || !input_dev)
1406                 goto err_free;
1407
1408         ps2_init(&psmouse->ps2dev, serio);
1409         INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1410         psmouse->dev = input_dev;
1411         snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1412
1413         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1414
1415         serio_set_drvdata(serio, psmouse);
1416
1417         error = serio_open(serio, drv);
1418         if (error)
1419                 goto err_clear_drvdata;
1420
1421         if (psmouse_probe(psmouse) < 0) {
1422                 error = -ENODEV;
1423                 goto err_close_serio;
1424         }
1425
1426         psmouse->rate = psmouse_rate;
1427         psmouse->resolution = psmouse_resolution;
1428         psmouse->resetafter = psmouse_resetafter;
1429         psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1430         psmouse->smartscroll = psmouse_smartscroll;
1431
1432         psmouse_switch_protocol(psmouse, NULL);
1433
1434         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1435         psmouse_initialize(psmouse);
1436
1437         error = input_register_device(psmouse->dev);
1438         if (error)
1439                 goto err_protocol_disconnect;
1440
1441         if (parent && parent->pt_activate)
1442                 parent->pt_activate(parent);
1443
1444         error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1445         if (error)
1446                 goto err_pt_deactivate;
1447
1448         psmouse_activate(psmouse);
1449
1450  out:
1451         /* If this is a pass-through port the parent needs to be re-activated */
1452         if (parent)
1453                 psmouse_activate(parent);
1454
1455         mutex_unlock(&psmouse_mutex);
1456         return retval;
1457
1458  err_pt_deactivate:
1459         if (parent && parent->pt_deactivate)
1460                 parent->pt_deactivate(parent);
1461         input_unregister_device(psmouse->dev);
1462         input_dev = NULL; /* so we don't try to free it below */
1463  err_protocol_disconnect:
1464         if (psmouse->disconnect)
1465                 psmouse->disconnect(psmouse);
1466         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1467  err_close_serio:
1468         serio_close(serio);
1469  err_clear_drvdata:
1470         serio_set_drvdata(serio, NULL);
1471  err_free:
1472         input_free_device(input_dev);
1473         kfree(psmouse);
1474
1475         retval = error;
1476         goto out;
1477 }
1478
1479
1480 static int psmouse_reconnect(struct serio *serio)
1481 {
1482         struct psmouse *psmouse = serio_get_drvdata(serio);
1483         struct psmouse *parent = NULL;
1484         struct serio_driver *drv = serio->drv;
1485         unsigned char type;
1486         int rc = -1;
1487
1488         if (!drv || !psmouse) {
1489                 psmouse_dbg(psmouse,
1490                             "reconnect request, but serio is disconnected, ignoring...\n");
1491                 return -1;
1492         }
1493
1494         mutex_lock(&psmouse_mutex);
1495
1496         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1497                 parent = serio_get_drvdata(serio->parent);
1498                 psmouse_deactivate(parent);
1499         }
1500
1501         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1502
1503         if (psmouse->reconnect) {
1504                 /* Skip trackpoint reconnect to reduce the latency */
1505                 if (strcmp(serio->name, "Synaptics pass-through"))
1506                         if (psmouse->reconnect(psmouse))
1507                                 goto out;
1508         } else {
1509                 psmouse_reset(psmouse);
1510
1511                 if (psmouse_probe(psmouse) < 0)
1512                         goto out;
1513
1514                 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1515                 if (psmouse->type != type)
1516                         goto out;
1517         }
1518
1519         /*
1520          * OK, the device type (and capabilities) match the old one,
1521          * we can continue using it, complete initialization
1522          */
1523         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1524
1525         psmouse_initialize(psmouse);
1526
1527         if (parent && parent->pt_activate)
1528                 parent->pt_activate(parent);
1529
1530         psmouse_activate(psmouse);
1531         rc = 0;
1532
1533 out:
1534         /* If this is a pass-through port the parent waits to be activated */
1535         if (parent)
1536                 psmouse_activate(parent);
1537
1538         mutex_unlock(&psmouse_mutex);
1539         return rc;
1540 }
1541
1542 static struct serio_device_id psmouse_serio_ids[] = {
1543         {
1544                 .type   = SERIO_8042,
1545                 .proto  = SERIO_ANY,
1546                 .id     = SERIO_ANY,
1547                 .extra  = SERIO_ANY,
1548         },
1549         {
1550                 .type   = SERIO_PS_PSTHRU,
1551                 .proto  = SERIO_ANY,
1552                 .id     = SERIO_ANY,
1553                 .extra  = SERIO_ANY,
1554         },
1555         { 0 }
1556 };
1557
1558 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1559
1560 static struct serio_driver psmouse_drv = {
1561         .driver         = {
1562                 .name   = "psmouse",
1563         },
1564         .description    = DRIVER_DESC,
1565         .id_table       = psmouse_serio_ids,
1566         .interrupt      = psmouse_interrupt,
1567         .connect        = psmouse_connect,
1568         .reconnect      = psmouse_reconnect,
1569         .disconnect     = psmouse_disconnect,
1570         .cleanup        = psmouse_cleanup,
1571 };
1572
1573 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1574                                  char *buf)
1575 {
1576         struct serio *serio = to_serio_port(dev);
1577         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1578         struct psmouse *psmouse;
1579
1580         psmouse = serio_get_drvdata(serio);
1581
1582         return attr->show(psmouse, attr->data, buf);
1583 }
1584
1585 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1586                                 const char *buf, size_t count)
1587 {
1588         struct serio *serio = to_serio_port(dev);
1589         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1590         struct psmouse *psmouse, *parent = NULL;
1591         int retval;
1592
1593         retval = mutex_lock_interruptible(&psmouse_mutex);
1594         if (retval)
1595                 goto out;
1596
1597         psmouse = serio_get_drvdata(serio);
1598
1599         if (attr->protect) {
1600                 if (psmouse->state == PSMOUSE_IGNORE) {
1601                         retval = -ENODEV;
1602                         goto out_unlock;
1603                 }
1604
1605                 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1606                         parent = serio_get_drvdata(serio->parent);
1607                         psmouse_deactivate(parent);
1608                 }
1609
1610                 psmouse_deactivate(psmouse);
1611         }
1612
1613         retval = attr->set(psmouse, attr->data, buf, count);
1614
1615         if (attr->protect) {
1616                 if (retval != -ENODEV)
1617                         psmouse_activate(psmouse);
1618
1619                 if (parent)
1620                         psmouse_activate(parent);
1621         }
1622
1623  out_unlock:
1624         mutex_unlock(&psmouse_mutex);
1625  out:
1626         return retval;
1627 }
1628
1629 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1630 {
1631         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1632
1633         return sprintf(buf, "%u\n", *field);
1634 }
1635
1636 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1637 {
1638         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1639         unsigned int value;
1640         int err;
1641
1642         err = kstrtouint(buf, 10, &value);
1643         if (err)
1644                 return err;
1645
1646         *field = value;
1647
1648         return count;
1649 }
1650
1651 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1652 {
1653         return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1654 }
1655
1656 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1657 {
1658         struct serio *serio = psmouse->ps2dev.serio;
1659         struct psmouse *parent = NULL;
1660         struct input_dev *old_dev, *new_dev;
1661         const struct psmouse_protocol *proto, *old_proto;
1662         int error;
1663         int retry = 0;
1664
1665         proto = psmouse_protocol_by_name(buf, count);
1666         if (!proto)
1667                 return -EINVAL;
1668
1669         if (psmouse->type == proto->type)
1670                 return count;
1671
1672         new_dev = input_allocate_device();
1673         if (!new_dev)
1674                 return -ENOMEM;
1675
1676         while (!list_empty(&serio->children)) {
1677                 if (++retry > 3) {
1678                         psmouse_warn(psmouse,
1679                                      "failed to destroy children ports, protocol change aborted.\n");
1680                         input_free_device(new_dev);
1681                         return -EIO;
1682                 }
1683
1684                 mutex_unlock(&psmouse_mutex);
1685                 serio_unregister_child_port(serio);
1686                 mutex_lock(&psmouse_mutex);
1687
1688                 if (serio->drv != &psmouse_drv) {
1689                         input_free_device(new_dev);
1690                         return -ENODEV;
1691                 }
1692
1693                 if (psmouse->type == proto->type) {
1694                         input_free_device(new_dev);
1695                         return count; /* switched by other thread */
1696                 }
1697         }
1698
1699         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1700                 parent = serio_get_drvdata(serio->parent);
1701                 if (parent->pt_deactivate)
1702                         parent->pt_deactivate(parent);
1703         }
1704
1705         old_dev = psmouse->dev;
1706         old_proto = psmouse_protocol_by_type(psmouse->type);
1707
1708         if (psmouse->disconnect)
1709                 psmouse->disconnect(psmouse);
1710
1711         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1712
1713         psmouse->dev = new_dev;
1714         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1715
1716         if (psmouse_switch_protocol(psmouse, proto) < 0) {
1717                 psmouse_reset(psmouse);
1718                 /* default to PSMOUSE_PS2 */
1719                 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1720         }
1721
1722         psmouse_initialize(psmouse);
1723         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1724
1725         error = input_register_device(psmouse->dev);
1726         if (error) {
1727                 if (psmouse->disconnect)
1728                         psmouse->disconnect(psmouse);
1729
1730                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1731                 input_free_device(new_dev);
1732                 psmouse->dev = old_dev;
1733                 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1734                 psmouse_switch_protocol(psmouse, old_proto);
1735                 psmouse_initialize(psmouse);
1736                 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1737
1738                 return error;
1739         }
1740
1741         input_unregister_device(old_dev);
1742
1743         if (parent && parent->pt_activate)
1744                 parent->pt_activate(parent);
1745
1746         return count;
1747 }
1748
1749 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1750 {
1751         unsigned int value;
1752         int err;
1753
1754         err = kstrtouint(buf, 10, &value);
1755         if (err)
1756                 return err;
1757
1758         psmouse->set_rate(psmouse, value);
1759         return count;
1760 }
1761
1762 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1763 {
1764         unsigned int value;
1765         int err;
1766
1767         err = kstrtouint(buf, 10, &value);
1768         if (err)
1769                 return err;
1770
1771         psmouse->set_resolution(psmouse, value);
1772         return count;
1773 }
1774
1775
1776 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1777 {
1778         const struct psmouse_protocol *proto;
1779
1780         if (!val)
1781                 return -EINVAL;
1782
1783         proto = psmouse_protocol_by_name(val, strlen(val));
1784
1785         if (!proto || !proto->maxproto)
1786                 return -EINVAL;
1787
1788         *((unsigned int *)kp->arg) = proto->type;
1789
1790         return 0;
1791 }
1792
1793 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1794 {
1795         int type = *((unsigned int *)kp->arg);
1796
1797         return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1798 }
1799
1800 static int __init psmouse_init(void)
1801 {
1802         int err;
1803
1804         lifebook_module_init();
1805         synaptics_module_init();
1806         hgpk_module_init();
1807
1808         kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1809         if (!kpsmoused_wq) {
1810                 pr_err("failed to create kpsmoused workqueue\n");
1811                 return -ENOMEM;
1812         }
1813
1814         err = serio_register_driver(&psmouse_drv);
1815         if (err)
1816                 destroy_workqueue(kpsmoused_wq);
1817
1818         return err;
1819 }
1820
1821 static void __exit psmouse_exit(void)
1822 {
1823         serio_unregister_driver(&psmouse_drv);
1824         destroy_workqueue(kpsmoused_wq);
1825 }
1826
1827 module_init(psmouse_init);
1828 module_exit(psmouse_exit);