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