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 #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 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,
 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_ALPS
 787         {
 788                 .type           = PSMOUSE_ALPS,
 789                 .name           = "AlpsPS/2",
 790                 .alias          = "alps",
 791                 .detect         = alps_detect,
 792                 .init           = alps_init,
 793         },
 794 #endif
 795 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
 796         {
 797                 .type           = PSMOUSE_LIFEBOOK,
 798                 .name           = "LBPS/2",
 799                 .alias          = "lifebook",
 800                 .detect         = lifebook_detect,
 801                 .init           = lifebook_init,
 802         },
 803 #endif
 804 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 805         {
 806                 .type           = PSMOUSE_TRACKPOINT,
 807                 .name           = "TPPS/2",
 808                 .alias          = "trackpoint",
 809                 .detect         = trackpoint_detect,
 810                 .try_passthru   = true,
 811         },
 812 #endif
 813 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 814         {
 815                 .type           = PSMOUSE_TOUCHKIT_PS2,
 816                 .name           = "touchkitPS/2",
 817                 .alias          = "touchkit",
 818                 .detect         = touchkit_ps2_detect,
 819         },
 820 #endif
 821 #ifdef CONFIG_MOUSE_PS2_OLPC
 822         {
 823                 .type           = PSMOUSE_HGPK,
 824                 .name           = "OLPC HGPK",
 825                 .alias          = "hgpk",
 826                 .detect         = hgpk_detect,
 827         },
 828 #endif
 829 #ifdef CONFIG_MOUSE_PS2_ELANTECH
 830         {
 831                 .type           = PSMOUSE_ELANTECH,
 832                 .name           = "ETPS/2",
 833                 .alias          = "elantech",
 834                 .detect         = elantech_detect,
 835                 .init           = elantech_init,
 836         },
 837 #endif
 838 #ifdef CONFIG_MOUSE_PS2_SENTELIC
 839         {
 840                 .type           = PSMOUSE_FSP,
 841                 .name           = "FSPPS/2",
 842                 .alias          = "fsp",
 843                 .detect         = fsp_detect,
 844                 .init           = fsp_init,
 845         },
 846 #endif
 847         {
 848                 .type           = PSMOUSE_CORTRON,
 849                 .name           = "CortronPS/2",
 850                 .alias          = "cortps",
 851                 .detect         = cortron_detect,
 852         },
 853 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
 854         {
 855                 .type           = PSMOUSE_FOCALTECH,
 856                 .name           = "FocalTechPS/2",
 857                 .alias          = "focaltech",
 858                 .detect         = focaltech_detect,
 859                 .init           = focaltech_init,
 860         },
 861 #endif
 862 #ifdef CONFIG_MOUSE_PS2_VMMOUSE
 863         {
 864                 .type           = PSMOUSE_VMMOUSE,
 865                 .name           = VMMOUSE_PSNAME,
 866                 .alias          = "vmmouse",
 867                 .detect         = vmmouse_detect,
 868                 .init           = vmmouse_init,
 869         },
 870 #endif
 871 #ifdef CONFIG_MOUSE_PS2_BYD
 872         {
 873                 .type           = PSMOUSE_BYD,
 874                 .name           = "BYDPS/2",
 875                 .alias          = "byd",
 876                 .detect         = byd_detect,
 877                 .init           = byd_init,
 878         },
 879 #endif
 880         {
 881                 .type           = PSMOUSE_AUTO,
 882                 .name           = "auto",
 883                 .alias          = "any",
 884                 .maxproto       = true,
 885         },
 886 };
 887
 888 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
 889 {
 890         int i;
 891
 892         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
 893                 if (psmouse_protocols[i].type == type)
 894                         return &psmouse_protocols[i];
 895
 896         return NULL;
 897 }
 898
 899 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
 900 {
 901         const struct psmouse_protocol *proto;
 902
 903         proto = __psmouse_protocol_by_type(type);
 904         if (proto)
 905                 return proto;
 906
 907         WARN_ON(1);
 908         return &psmouse_protocols[0];
 909 }
 910
 911 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
 912 {
 913         const struct psmouse_protocol *p;
 914         int i;
 915
 916         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
 917                 p = &psmouse_protocols[i];
 918
 919                 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
 920                     (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
 921                         return &psmouse_protocols[i];
 922         }
 923
 924         return NULL;
 925 }
 926
 927 /*
 928  * Apply default settings to the psmouse structure. Most of them will
 929  * be overridden by individual protocol initialization routines.
 930  */
 931 static void psmouse_apply_defaults(struct psmouse *psmouse)
 932 {
 933         struct input_dev *input_dev = psmouse->dev;
 934
 935         memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
 936         memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
 937         memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
 938         memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
 939         memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
 940
 941         __set_bit(EV_KEY, input_dev->evbit);
 942         __set_bit(EV_REL, input_dev->evbit);
 943
 944         __set_bit(BTN_LEFT, input_dev->keybit);
 945         __set_bit(BTN_RIGHT, input_dev->keybit);
 946
 947         __set_bit(REL_X, input_dev->relbit);
 948         __set_bit(REL_Y, input_dev->relbit);
 949
 950         __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
 951
 952         psmouse->protocol = &psmouse_protocols[0];
 953
 954         psmouse->set_rate = psmouse_set_rate;
 955         psmouse->set_resolution = psmouse_set_resolution;
 956         psmouse->set_scale = psmouse_set_scale;
 957         psmouse->poll = psmouse_poll;
 958         psmouse->protocol_handler = psmouse_process_byte;
 959         psmouse->pktsize = 3;
 960         psmouse->reconnect = NULL;
 961         psmouse->fast_reconnect = NULL;
 962         psmouse->disconnect = NULL;
 963         psmouse->cleanup = NULL;
 964         psmouse->pt_activate = NULL;
 965         psmouse->pt_deactivate = NULL;
 966 }
 967
 968 static bool psmouse_try_protocol(struct psmouse *psmouse,
 969                                  enum psmouse_type type,
 970                                  unsigned int *max_proto,
 971                                  bool set_properties, bool init_allowed)
 972 {
 973         const struct psmouse_protocol *proto;
 974
 975         proto = __psmouse_protocol_by_type(type);
 976         if (!proto)
 977                 return false;
 978
 979         if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
 980             !proto->try_passthru) {
 981                 return false;
 982         }
 983
 984         if (set_properties)
 985                 psmouse_apply_defaults(psmouse);
 986
 987         if (proto->detect(psmouse, set_properties) != 0)
 988                 return false;
 989
 990         if (set_properties && proto->init && init_allowed) {
 991                 if (proto->init(psmouse) != 0) {
 992                         /*
 993                          * We detected device, but init failed. Adjust
 994                          * max_proto so we only try standard protocols.
 995                          */
 996                         if (*max_proto > PSMOUSE_IMEX)
 997                                 *max_proto = PSMOUSE_IMEX;
 998
 999                         return false;
1000                 }
1001         }
1002
1003         return true;
1004 }
1005
1006 /*
1007  * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
1008  * the mouse may have.
1009  */
1010 static int psmouse_extensions(struct psmouse *psmouse,
1011                               unsigned int max_proto, bool set_properties)
1012 {
1013         bool synaptics_hardware = false;
1014
1015         /*
1016          * Always check for focaltech, this is safe as it uses pnp-id
1017          * matching.
1018          */
1019         if (psmouse_try_protocol(psmouse, PSMOUSE_FOCALTECH,
1020                                  &max_proto, set_properties, false)) {
1021                 if (max_proto > PSMOUSE_IMEX &&
1022                     IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1023                     (!set_properties || focaltech_init(psmouse) == 0)) {
1024                         return PSMOUSE_FOCALTECH;
1025                 }
1026                 /*
1027                  * Restrict psmouse_max_proto so that psmouse_initialize()
1028                  * does not try to reset rate and resolution, because even
1029                  * that upsets the device.
1030                  * This also causes us to basically fall through to basic
1031                  * protocol detection, where we fully reset the mouse,
1032                  * and set it up as bare PS/2 protocol device.
1033                  */
1034                 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1035         }
1036
1037         /*
1038          * We always check for LifeBook because it does not disturb mouse
1039          * (it only checks DMI information).
1040          */
1041         if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1042                                  set_properties, max_proto > PSMOUSE_IMEX))
1043                 return PSMOUSE_LIFEBOOK;
1044
1045         if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1046                                  set_properties, max_proto > PSMOUSE_IMEX))
1047                 return PSMOUSE_VMMOUSE;
1048
1049         /*
1050          * Try Kensington ThinkingMouse (we try first, because Synaptics
1051          * probe upsets the ThinkingMouse).
1052          */
1053         if (max_proto > PSMOUSE_IMEX &&
1054             psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1055                                  set_properties, true)) {
1056                 return PSMOUSE_THINKPS;
1057         }
1058
1059         /*
1060          * Try Synaptics TouchPad. Note that probing is done even if
1061          * Synaptics protocol support is disabled in config - we need to
1062          * know if it is Synaptics so we can reset it properly after
1063          * probing for IntelliMouse.
1064          */
1065         if (max_proto > PSMOUSE_PS2 &&
1066             psmouse_try_protocol(psmouse, PSMOUSE_SYNAPTICS, &max_proto,
1067                                  set_properties, false)) {
1068                 synaptics_hardware = true;
1069
1070                 if (max_proto > PSMOUSE_IMEX) {
1071                         /*
1072                          * Try activating protocol, but check if support is
1073                          * enabled first, since we try detecting Synaptics
1074                          * even when protocol is disabled.
1075                          */
1076                         if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
1077                             (!set_properties || synaptics_init(psmouse) == 0)) {
1078                                 return PSMOUSE_SYNAPTICS;
1079                         }
1080
1081                         /*
1082                          * Some Synaptics touchpads can emulate extended
1083                          * protocols (like IMPS/2).  Unfortunately
1084                          * Logitech/Genius probes confuse some firmware
1085                          * versions so we'll have to skip them.
1086                          */
1087                         max_proto = PSMOUSE_IMEX;
1088                 }
1089
1090                 /*
1091                  * Make sure that touchpad is in relative mode, gestures
1092                  * (taps) are enabled.
1093                  */
1094                 synaptics_reset(psmouse);
1095         }
1096
1097         /*
1098          * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1099          * because Finger Sensing Pad probe upsets some modules of Cypress
1100          * Trackpads.
1101          */
1102         if (max_proto > PSMOUSE_IMEX &&
1103             psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1104                                  set_properties, true)) {
1105                 return PSMOUSE_CYPRESS;
1106         }
1107
1108         /* Try ALPS TouchPad */
1109         if (max_proto > PSMOUSE_IMEX) {
1110                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1111                 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1112                                          &max_proto, set_properties, true))
1113                         return PSMOUSE_ALPS;
1114         }
1115
1116         /* Try OLPC HGPK touchpad */
1117         if (max_proto > PSMOUSE_IMEX &&
1118             psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1119                                  set_properties, true)) {
1120                 return PSMOUSE_HGPK;
1121         }
1122
1123         /* Try Elantech touchpad */
1124         if (max_proto > PSMOUSE_IMEX &&
1125             psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1126                                  &max_proto, set_properties, true)) {
1127                 return PSMOUSE_ELANTECH;
1128         }
1129
1130         if (max_proto > PSMOUSE_IMEX) {
1131                 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1132                                          &max_proto, set_properties, true))
1133                         return PSMOUSE_GENPS;
1134
1135                 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1136                                          &max_proto, set_properties, true))
1137                         return PSMOUSE_PS2PP;
1138
1139                 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1140                                          &max_proto, set_properties, true))
1141                         return PSMOUSE_TRACKPOINT;
1142
1143                 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1144                                          &max_proto, set_properties, true))
1145                         return PSMOUSE_TOUCHKIT_PS2;
1146         }
1147
1148         /*
1149          * Try Finger Sensing Pad. We do it here because its probe upsets
1150          * Trackpoint devices (causing TP_READ_ID command to time out).
1151          */
1152         if (max_proto > PSMOUSE_IMEX &&
1153             psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1154                                  &max_proto, set_properties, true)) {
1155                 return PSMOUSE_FSP;
1156         }
1157
1158         /*
1159          * Reset to defaults in case the device got confused by extended
1160          * protocol probes. Note that we follow up with full reset because
1161          * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1162          */
1163         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1164         psmouse_reset(psmouse);
1165
1166         if (max_proto >= PSMOUSE_IMEX &&
1167             psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1168                                  &max_proto, set_properties, true)) {
1169                 return PSMOUSE_IMEX;
1170         }
1171
1172         if (max_proto >= PSMOUSE_IMPS &&
1173             psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1174                                  &max_proto, set_properties, true)) {
1175                 return PSMOUSE_IMPS;
1176         }
1177
1178         /*
1179          * Okay, all failed, we have a standard mouse here. The number of
1180          * the buttons is still a question, though. We assume 3.
1181          */
1182         psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1183                              &max_proto, set_properties, true);
1184
1185         if (synaptics_hardware) {
1186                 /*
1187                  * We detected Synaptics hardware but it did not respond to
1188                  * IMPS/2 probes.  We need to reset the touchpad because if
1189                  * there is a track point on the pass through port it could
1190                  * get disabled while probing for protocol extensions.
1191                  */
1192                 psmouse_reset(psmouse);
1193         }
1194
1195         return PSMOUSE_PS2;
1196 }
1197
1198 /*
1199  * psmouse_probe() probes for a PS/2 mouse.
1200  */
1201 static int psmouse_probe(struct psmouse *psmouse)
1202 {
1203         struct ps2dev *ps2dev = &psmouse->ps2dev;
1204         unsigned char param[2];
1205
1206         /*
1207          * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1208          * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1209          * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1210          * subsequent ID queries, probably due to a firmware bug.
1211          */
1212         param[0] = 0xa5;
1213         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1214                 return -1;
1215
1216         if (param[0] != 0x00 && param[0] != 0x03 &&
1217             param[0] != 0x04 && param[0] != 0xff)
1218                 return -1;
1219
1220         /*
1221          * Then we reset and disable the mouse so that it doesn't generate
1222          * events.
1223          */
1224         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1225                 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1226                              ps2dev->serio->phys);
1227
1228         return 0;
1229 }
1230
1231 /*
1232  * psmouse_initialize() initializes the mouse to a sane state.
1233  */
1234 static void psmouse_initialize(struct psmouse *psmouse)
1235 {
1236         /*
1237          * We set the mouse report rate, resolution and scaling.
1238          */
1239         if (psmouse_max_proto != PSMOUSE_PS2) {
1240                 psmouse->set_rate(psmouse, psmouse->rate);
1241                 psmouse->set_resolution(psmouse, psmouse->resolution);
1242                 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1243         }
1244 }
1245
1246 /*
1247  * psmouse_activate() enables the mouse so that we get motion reports from it.
1248  */
1249 int psmouse_activate(struct psmouse *psmouse)
1250 {
1251         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1252                 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1253                              psmouse->ps2dev.serio->phys);
1254                 return -1;
1255         }
1256
1257         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1258         return 0;
1259 }
1260
1261 /*
1262  * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1263  * motion reports from it unless we explicitly request it.
1264  */
1265 int psmouse_deactivate(struct psmouse *psmouse)
1266 {
1267         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1268                 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1269                              psmouse->ps2dev.serio->phys);
1270                 return -1;
1271         }
1272
1273         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1274         return 0;
1275 }
1276
1277 /*
1278  * psmouse_resync() attempts to re-validate current protocol.
1279  */
1280 static void psmouse_resync(struct work_struct *work)
1281 {
1282         struct psmouse *parent = NULL, *psmouse =
1283                 container_of(work, struct psmouse, resync_work.work);
1284         struct serio *serio = psmouse->ps2dev.serio;
1285         psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1286         bool failed = false, enabled = false;
1287         int i;
1288
1289         mutex_lock(&psmouse_mutex);
1290
1291         if (psmouse->state != PSMOUSE_RESYNCING)
1292                 goto out;
1293
1294         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1295                 parent = serio_get_drvdata(serio->parent);
1296                 psmouse_deactivate(parent);
1297         }
1298
1299         /*
1300          * Some mice don't ACK commands sent while they are in the middle of
1301          * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1302          * instead of ps2_command() which would wait for 200ms for an ACK
1303          * that may never come.
1304          * As an additional quirk ALPS touchpads may not only forget to ACK
1305          * disable command but will stop reporting taps, so if we see that
1306          * mouse at least once ACKs disable we will do full reconnect if ACK
1307          * is missing.
1308          */
1309         psmouse->num_resyncs++;
1310
1311         if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1312                 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1313                         failed = true;
1314         } else
1315                 psmouse->acks_disable_command = true;
1316
1317         /*
1318          * Poll the mouse. If it was reset the packet will be shorter than
1319          * psmouse->pktsize and ps2_command will fail. We do not expect and
1320          * do not handle scenario when mouse "upgrades" its protocol while
1321          * disconnected since it would require additional delay. If we ever
1322          * see a mouse that does it we'll adjust the code.
1323          */
1324         if (!failed) {
1325                 if (psmouse->poll(psmouse))
1326                         failed = true;
1327                 else {
1328                         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1329                         for (i = 0; i < psmouse->pktsize; i++) {
1330                                 psmouse->pktcnt++;
1331                                 rc = psmouse->protocol_handler(psmouse);
1332                                 if (rc != PSMOUSE_GOOD_DATA)
1333                                         break;
1334                         }
1335                         if (rc != PSMOUSE_FULL_PACKET)
1336                                 failed = true;
1337                         psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1338                 }
1339         }
1340
1341         /*
1342          * Now try to enable mouse. We try to do that even if poll failed
1343          * and also repeat our attempts 5 times, otherwise we may be left
1344          * out with disabled mouse.
1345          */
1346         for (i = 0; i < 5; i++) {
1347                 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1348                         enabled = true;
1349                         break;
1350                 }
1351                 msleep(200);
1352         }
1353
1354         if (!enabled) {
1355                 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1356                              psmouse->ps2dev.serio->phys);
1357                 failed = true;
1358         }
1359
1360         if (failed) {
1361                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1362                 psmouse_info(psmouse,
1363                              "resync failed, issuing reconnect request\n");
1364                 serio_reconnect(serio);
1365         } else
1366                 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1367
1368         if (parent)
1369                 psmouse_activate(parent);
1370  out:
1371         mutex_unlock(&psmouse_mutex);
1372 }
1373
1374 /*
1375  * psmouse_cleanup() resets the mouse into power-on state.
1376  */
1377 static void psmouse_cleanup(struct serio *serio)
1378 {
1379         struct psmouse *psmouse = serio_get_drvdata(serio);
1380         struct psmouse *parent = NULL;
1381
1382         mutex_lock(&psmouse_mutex);
1383
1384         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1385                 parent = serio_get_drvdata(serio->parent);
1386                 psmouse_deactivate(parent);
1387         }
1388
1389         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1390
1391         /*
1392          * Disable stream mode so cleanup routine can proceed undisturbed.
1393          */
1394         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1395                 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1396                              psmouse->ps2dev.serio->phys);
1397
1398         if (psmouse->cleanup)
1399                 psmouse->cleanup(psmouse);
1400
1401         /*
1402          * Reset the mouse to defaults (bare PS/2 protocol).
1403          */
1404         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1405
1406         /*
1407          * Some boxes, such as HP nx7400, get terribly confused if mouse
1408          * is not fully enabled before suspending/shutting down.
1409          */
1410         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1411
1412         if (parent) {
1413                 if (parent->pt_deactivate)
1414                         parent->pt_deactivate(parent);
1415
1416                 psmouse_activate(parent);
1417         }
1418
1419         mutex_unlock(&psmouse_mutex);
1420 }
1421
1422 /*
1423  * psmouse_disconnect() closes and frees.
1424  */
1425 static void psmouse_disconnect(struct serio *serio)
1426 {
1427         struct psmouse *psmouse, *parent = NULL;
1428
1429         psmouse = serio_get_drvdata(serio);
1430
1431         sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1432
1433         mutex_lock(&psmouse_mutex);
1434
1435         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1436
1437         /* make sure we don't have a resync in progress */
1438         mutex_unlock(&psmouse_mutex);
1439         flush_workqueue(kpsmoused_wq);
1440         mutex_lock(&psmouse_mutex);
1441
1442         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1443                 parent = serio_get_drvdata(serio->parent);
1444                 psmouse_deactivate(parent);
1445         }
1446
1447         if (psmouse->disconnect)
1448                 psmouse->disconnect(psmouse);
1449
1450         if (parent && parent->pt_deactivate)
1451                 parent->pt_deactivate(parent);
1452
1453         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1454
1455         serio_close(serio);
1456         serio_set_drvdata(serio, NULL);
1457         input_unregister_device(psmouse->dev);
1458         kfree(psmouse);
1459
1460         if (parent)
1461                 psmouse_activate(parent);
1462
1463         mutex_unlock(&psmouse_mutex);
1464 }
1465
1466 static int psmouse_switch_protocol(struct psmouse *psmouse,
1467                                    const struct psmouse_protocol *proto)
1468 {
1469         const struct psmouse_protocol *selected_proto;
1470         struct input_dev *input_dev = psmouse->dev;
1471         enum psmouse_type type;
1472
1473         input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1474
1475         if (proto && (proto->detect || proto->init)) {
1476                 psmouse_apply_defaults(psmouse);
1477
1478                 if (proto->detect && proto->detect(psmouse, true) < 0)
1479                         return -1;
1480
1481                 if (proto->init && proto->init(psmouse) < 0)
1482                         return -1;
1483
1484                 selected_proto = proto;
1485         } else {
1486                 type = psmouse_extensions(psmouse, psmouse_max_proto, true);
1487                 selected_proto = psmouse_protocol_by_type(type);
1488         }
1489
1490         psmouse->protocol = selected_proto;
1491
1492         /*
1493          * If mouse's packet size is 3 there is no point in polling the
1494          * device in hopes to detect protocol reset - we won't get less
1495          * than 3 bytes response anyhow.
1496          */
1497         if (psmouse->pktsize == 3)
1498                 psmouse->resync_time = 0;
1499
1500         /*
1501          * Some smart KVMs fake response to POLL command returning just
1502          * 3 bytes and messing up our resync logic, so if initial poll
1503          * fails we won't try polling the device anymore. Hopefully
1504          * such KVM will maintain initially selected protocol.
1505          */
1506         if (psmouse->resync_time && psmouse->poll(psmouse))
1507                 psmouse->resync_time = 0;
1508
1509         snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1510                  selected_proto->name, psmouse->vendor, psmouse->name);
1511
1512         input_dev->name = psmouse->devname;
1513         input_dev->phys = psmouse->phys;
1514         input_dev->id.bustype = BUS_I8042;
1515         input_dev->id.vendor = 0x0002;
1516         input_dev->id.product = psmouse->protocol->type;
1517         input_dev->id.version = psmouse->model;
1518
1519         return 0;
1520 }
1521
1522 /*
1523  * psmouse_connect() is a callback from the serio module when
1524  * an unhandled serio port is found.
1525  */
1526 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1527 {
1528         struct psmouse *psmouse, *parent = NULL;
1529         struct input_dev *input_dev;
1530         int retval = 0, error = -ENOMEM;
1531
1532         mutex_lock(&psmouse_mutex);
1533
1534         /*
1535          * If this is a pass-through port deactivate parent so the device
1536          * connected to this port can be successfully identified
1537          */
1538         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1539                 parent = serio_get_drvdata(serio->parent);
1540                 psmouse_deactivate(parent);
1541         }
1542
1543         psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1544         input_dev = input_allocate_device();
1545         if (!psmouse || !input_dev)
1546                 goto err_free;
1547
1548         ps2_init(&psmouse->ps2dev, serio);
1549         INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1550         psmouse->dev = input_dev;
1551         snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1552
1553         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1554
1555         serio_set_drvdata(serio, psmouse);
1556
1557         error = serio_open(serio, drv);
1558         if (error)
1559                 goto err_clear_drvdata;
1560
1561         /* give PT device some time to settle down before probing */
1562         if (serio->id.type == SERIO_PS_PSTHRU)
1563                 usleep_range(10000, 15000);
1564
1565         if (psmouse_probe(psmouse) < 0) {
1566                 error = -ENODEV;
1567                 goto err_close_serio;
1568         }
1569
1570         psmouse->rate = psmouse_rate;
1571         psmouse->resolution = psmouse_resolution;
1572         psmouse->resetafter = psmouse_resetafter;
1573         psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1574         psmouse->smartscroll = psmouse_smartscroll;
1575
1576         psmouse_switch_protocol(psmouse, NULL);
1577
1578         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1579         psmouse_initialize(psmouse);
1580
1581         error = input_register_device(psmouse->dev);
1582         if (error)
1583                 goto err_protocol_disconnect;
1584
1585         if (parent && parent->pt_activate)
1586                 parent->pt_activate(parent);
1587
1588         error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1589         if (error)
1590                 goto err_pt_deactivate;
1591
1592         psmouse_activate(psmouse);
1593
1594  out:
1595         /* If this is a pass-through port the parent needs to be re-activated */
1596         if (parent)
1597                 psmouse_activate(parent);
1598
1599         mutex_unlock(&psmouse_mutex);
1600         return retval;
1601
1602  err_pt_deactivate:
1603         if (parent && parent->pt_deactivate)
1604                 parent->pt_deactivate(parent);
1605         input_unregister_device(psmouse->dev);
1606         input_dev = NULL; /* so we don't try to free it below */
1607  err_protocol_disconnect:
1608         if (psmouse->disconnect)
1609                 psmouse->disconnect(psmouse);
1610         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1611  err_close_serio:
1612         serio_close(serio);
1613  err_clear_drvdata:
1614         serio_set_drvdata(serio, NULL);
1615  err_free:
1616         input_free_device(input_dev);
1617         kfree(psmouse);
1618
1619         retval = error;
1620         goto out;
1621 }
1622
1623 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
1624 {
1625         struct psmouse *psmouse = serio_get_drvdata(serio);
1626         struct psmouse *parent = NULL;
1627         int (*reconnect_handler)(struct psmouse *);
1628         enum psmouse_type type;
1629         int rc = -1;
1630
1631         mutex_lock(&psmouse_mutex);
1632
1633         if (fast_reconnect) {
1634                 reconnect_handler = psmouse->fast_reconnect;
1635                 if (!reconnect_handler) {
1636                         rc = -ENOENT;
1637                         goto out_unlock;
1638                 }
1639         } else {
1640                 reconnect_handler = psmouse->reconnect;
1641         }
1642
1643         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1644                 parent = serio_get_drvdata(serio->parent);
1645                 psmouse_deactivate(parent);
1646         }
1647
1648         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1649
1650         if (reconnect_handler) {
1651                 if (reconnect_handler(psmouse))
1652                         goto out;
1653         } else {
1654                 psmouse_reset(psmouse);
1655
1656                 if (psmouse_probe(psmouse) < 0)
1657                         goto out;
1658
1659                 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1660                 if (psmouse->protocol->type != type)
1661                         goto out;
1662         }
1663
1664         /*
1665          * OK, the device type (and capabilities) match the old one,
1666          * we can continue using it, complete initialization
1667          */
1668         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1669
1670         psmouse_initialize(psmouse);
1671
1672         if (parent && parent->pt_activate)
1673                 parent->pt_activate(parent);
1674
1675         psmouse_activate(psmouse);
1676         rc = 0;
1677
1678 out:
1679         /* If this is a pass-through port the parent waits to be activated */
1680         if (parent)
1681                 psmouse_activate(parent);
1682
1683 out_unlock:
1684         mutex_unlock(&psmouse_mutex);
1685         return rc;
1686 }
1687
1688 static int psmouse_reconnect(struct serio *serio)
1689 {
1690         return __psmouse_reconnect(serio, false);
1691 }
1692
1693 static int psmouse_fast_reconnect(struct serio *serio)
1694 {
1695         return __psmouse_reconnect(serio, true);
1696 }
1697
1698 static struct serio_device_id psmouse_serio_ids[] = {
1699         {
1700                 .type   = SERIO_8042,
1701                 .proto  = SERIO_ANY,
1702                 .id     = SERIO_ANY,
1703                 .extra  = SERIO_ANY,
1704         },
1705         {
1706                 .type   = SERIO_PS_PSTHRU,
1707                 .proto  = SERIO_ANY,
1708                 .id     = SERIO_ANY,
1709                 .extra  = SERIO_ANY,
1710         },
1711         { 0 }
1712 };
1713
1714 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1715
1716 static struct serio_driver psmouse_drv = {
1717         .driver         = {
1718                 .name   = "psmouse",
1719         },
1720         .description    = DRIVER_DESC,
1721         .id_table       = psmouse_serio_ids,
1722         .interrupt      = psmouse_interrupt,
1723         .connect        = psmouse_connect,
1724         .reconnect      = psmouse_reconnect,
1725         .fast_reconnect = psmouse_fast_reconnect,
1726         .disconnect     = psmouse_disconnect,
1727         .cleanup        = psmouse_cleanup,
1728 };
1729
1730 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1731                                  char *buf)
1732 {
1733         struct serio *serio = to_serio_port(dev);
1734         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1735         struct psmouse *psmouse;
1736
1737         psmouse = serio_get_drvdata(serio);
1738
1739         return attr->show(psmouse, attr->data, buf);
1740 }
1741
1742 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1743                                 const char *buf, size_t count)
1744 {
1745         struct serio *serio = to_serio_port(dev);
1746         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1747         struct psmouse *psmouse, *parent = NULL;
1748         int retval;
1749
1750         retval = mutex_lock_interruptible(&psmouse_mutex);
1751         if (retval)
1752                 goto out;
1753
1754         psmouse = serio_get_drvdata(serio);
1755
1756         if (attr->protect) {
1757                 if (psmouse->state == PSMOUSE_IGNORE) {
1758                         retval = -ENODEV;
1759                         goto out_unlock;
1760                 }
1761
1762                 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1763                         parent = serio_get_drvdata(serio->parent);
1764                         psmouse_deactivate(parent);
1765                 }
1766
1767                 psmouse_deactivate(psmouse);
1768         }
1769
1770         retval = attr->set(psmouse, attr->data, buf, count);
1771
1772         if (attr->protect) {
1773                 if (retval != -ENODEV)
1774                         psmouse_activate(psmouse);
1775
1776                 if (parent)
1777                         psmouse_activate(parent);
1778         }
1779
1780  out_unlock:
1781         mutex_unlock(&psmouse_mutex);
1782  out:
1783         return retval;
1784 }
1785
1786 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1787 {
1788         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1789
1790         return sprintf(buf, "%u\n", *field);
1791 }
1792
1793 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1794 {
1795         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1796         unsigned int value;
1797         int err;
1798
1799         err = kstrtouint(buf, 10, &value);
1800         if (err)
1801                 return err;
1802
1803         *field = value;
1804
1805         return count;
1806 }
1807
1808 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1809 {
1810         return sprintf(buf, "%s\n", psmouse->protocol->name);
1811 }
1812
1813 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1814 {
1815         struct serio *serio = psmouse->ps2dev.serio;
1816         struct psmouse *parent = NULL;
1817         struct input_dev *old_dev, *new_dev;
1818         const struct psmouse_protocol *proto, *old_proto;
1819         int error;
1820         int retry = 0;
1821
1822         proto = psmouse_protocol_by_name(buf, count);
1823         if (!proto)
1824                 return -EINVAL;
1825
1826         if (psmouse->protocol == proto)
1827                 return count;
1828
1829         new_dev = input_allocate_device();
1830         if (!new_dev)
1831                 return -ENOMEM;
1832
1833         while (!list_empty(&serio->children)) {
1834                 if (++retry > 3) {
1835                         psmouse_warn(psmouse,
1836                                      "failed to destroy children ports, protocol change aborted.\n");
1837                         input_free_device(new_dev);
1838                         return -EIO;
1839                 }
1840
1841                 mutex_unlock(&psmouse_mutex);
1842                 serio_unregister_child_port(serio);
1843                 mutex_lock(&psmouse_mutex);
1844
1845                 if (serio->drv != &psmouse_drv) {
1846                         input_free_device(new_dev);
1847                         return -ENODEV;
1848                 }
1849
1850                 if (psmouse->protocol == proto) {
1851                         input_free_device(new_dev);
1852                         return count; /* switched by other thread */
1853                 }
1854         }
1855
1856         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1857                 parent = serio_get_drvdata(serio->parent);
1858                 if (parent->pt_deactivate)
1859                         parent->pt_deactivate(parent);
1860         }
1861
1862         old_dev = psmouse->dev;
1863         old_proto = psmouse->protocol;
1864
1865         if (psmouse->disconnect)
1866                 psmouse->disconnect(psmouse);
1867
1868         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1869
1870         psmouse->dev = new_dev;
1871         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1872
1873         if (psmouse_switch_protocol(psmouse, proto) < 0) {
1874                 psmouse_reset(psmouse);
1875                 /* default to PSMOUSE_PS2 */
1876                 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1877         }
1878
1879         psmouse_initialize(psmouse);
1880         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1881
1882         error = input_register_device(psmouse->dev);
1883         if (error) {
1884                 if (psmouse->disconnect)
1885                         psmouse->disconnect(psmouse);
1886
1887                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1888                 input_free_device(new_dev);
1889                 psmouse->dev = old_dev;
1890                 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1891                 psmouse_switch_protocol(psmouse, old_proto);
1892                 psmouse_initialize(psmouse);
1893                 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1894
1895                 return error;
1896         }
1897
1898         input_unregister_device(old_dev);
1899
1900         if (parent && parent->pt_activate)
1901                 parent->pt_activate(parent);
1902
1903         return count;
1904 }
1905
1906 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1907 {
1908         unsigned int value;
1909         int err;
1910
1911         err = kstrtouint(buf, 10, &value);
1912         if (err)
1913                 return err;
1914
1915         psmouse->set_rate(psmouse, value);
1916         return count;
1917 }
1918
1919 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1920 {
1921         unsigned int value;
1922         int err;
1923
1924         err = kstrtouint(buf, 10, &value);
1925         if (err)
1926                 return err;
1927
1928         psmouse->set_resolution(psmouse, value);
1929         return count;
1930 }
1931
1932
1933 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1934 {
1935         const struct psmouse_protocol *proto;
1936
1937         if (!val)
1938                 return -EINVAL;
1939
1940         proto = psmouse_protocol_by_name(val, strlen(val));
1941
1942         if (!proto || !proto->maxproto)
1943                 return -EINVAL;
1944
1945         *((unsigned int *)kp->arg) = proto->type;
1946
1947         return 0;
1948 }
1949
1950 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1951 {
1952         int type = *((unsigned int *)kp->arg);
1953
1954         return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1955 }
1956
1957 static int __init psmouse_init(void)
1958 {
1959         int err;
1960
1961         lifebook_module_init();
1962         synaptics_module_init();
1963         hgpk_module_init();
1964
1965         kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
1966         if (!kpsmoused_wq) {
1967                 pr_err("failed to create kpsmoused workqueue\n");
1968                 return -ENOMEM;
1969         }
1970
1971         err = serio_register_driver(&psmouse_drv);
1972         if (err)
1973                 destroy_workqueue(kpsmoused_wq);
1974
1975         return err;
1976 }
1977
1978 static void __exit psmouse_exit(void)
1979 {
1980         serio_unregister_driver(&psmouse_drv);
1981         destroy_workqueue(kpsmoused_wq);
1982 }
1983
1984 module_init(psmouse_init);
1985 module_exit(psmouse_exit);