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 #include <linux/delay.h>
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/slab.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/input.h>
  20 #include <linux/serio.h>
  21 #include <linux/init.h>
  22 #include <linux/libps2.h>
  23 #include <linux/mutex.h>
  24
  25 #include "psmouse.h"
  26 #include "synaptics.h"
  27 #include "logips2pp.h"
  28 #include "alps.h"
  29 #include "lifebook.h"
  30 #include "trackpoint.h"
  31
  32 #define DRIVER_DESC     "PS/2 mouse driver"
  33
  34 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  35 MODULE_DESCRIPTION(DRIVER_DESC);
  36 MODULE_LICENSE("GPL");
  37
  38 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
  39 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
  40 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
  41 #define param_check_proto_abbrev(name, p)       __param_check(name, p, unsigned int)
  42 #define param_set_proto_abbrev                  psmouse_set_maxproto
  43 #define param_get_proto_abbrev                  psmouse_get_maxproto
  44 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
  45 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
  46
  47 static unsigned int psmouse_resolution = 200;
  48 module_param_named(resolution, psmouse_resolution, uint, 0644);
  49 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
  50
  51 static unsigned int psmouse_rate = 100;
  52 module_param_named(rate, psmouse_rate, uint, 0644);
  53 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
  54
  55 static unsigned int psmouse_smartscroll = 1;
  56 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
  57 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
  58
  59 static unsigned int psmouse_resetafter = 5;
  60 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
  61 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
  62
  63 static unsigned int psmouse_resync_time;
  64 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
  65 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
  66
  67 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
  68                         NULL,
  69                         psmouse_attr_show_protocol, psmouse_attr_set_protocol);
  70 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
  71                         (void *) offsetof(struct psmouse, rate),
  72                         psmouse_show_int_attr, psmouse_attr_set_rate);
  73 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
  74                         (void *) offsetof(struct psmouse, resolution),
  75                         psmouse_show_int_attr, psmouse_attr_set_resolution);
  76 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
  77                         (void *) offsetof(struct psmouse, resetafter),
  78                         psmouse_show_int_attr, psmouse_set_int_attr);
  79 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
  80                         (void *) offsetof(struct psmouse, resync_time),
  81                         psmouse_show_int_attr, psmouse_set_int_attr);
  82
  83 static struct attribute *psmouse_attributes[] = {
  84         &psmouse_attr_protocol.dattr.attr,
  85         &psmouse_attr_rate.dattr.attr,
  86         &psmouse_attr_resolution.dattr.attr,
  87         &psmouse_attr_resetafter.dattr.attr,
  88         &psmouse_attr_resync_time.dattr.attr,
  89         NULL
  90 };
  91
  92 static struct attribute_group psmouse_attribute_group = {
  93         .attrs  = psmouse_attributes,
  94 };
  95
  96 __obsolete_setup("psmouse_noext");
  97 __obsolete_setup("psmouse_resolution=");
  98 __obsolete_setup("psmouse_smartscroll=");
  99 __obsolete_setup("psmouse_resetafter=");
 100 __obsolete_setup("psmouse_rate=");
 101
 102 /*
 103  * psmouse_mutex protects all operations changing state of mouse
 104  * (connecting, disconnecting, changing rate or resolution via
 105  * sysfs). We could use a per-device semaphore but since there
 106  * rarely more than one PS/2 mouse connected and since semaphore
 107  * is taken in "slow" paths it is not worth it.
 108  */
 109 static DEFINE_MUTEX(psmouse_mutex);
 110
 111 static struct workqueue_struct *kpsmoused_wq;
 112
 113 struct psmouse_protocol {
 114         enum psmouse_type type;
 115         const char *name;
 116         const char *alias;
 117         int maxproto;
 118         int (*detect)(struct psmouse *, int);
 119         int (*init)(struct psmouse *);
 120 };
 121
 122 /*
 123  * psmouse_process_byte() analyzes the PS/2 data stream and reports
 124  * relevant events to the input module once full packet has arrived.
 125  */
 126
 127 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
 128 {
 129         struct input_dev *dev = psmouse->dev;
 130         unsigned char *packet = psmouse->packet;
 131
 132         if (psmouse->pktcnt < psmouse->pktsize)
 133                 return PSMOUSE_GOOD_DATA;
 134
 135 /*
 136  * Full packet accumulated, process it
 137  */
 138
 139         input_regs(dev, regs);
 140
 141 /*
 142  * Scroll wheel on IntelliMice, scroll buttons on NetMice
 143  */
 144
 145         if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
 146                 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
 147
 148 /*
 149  * Scroll wheel and buttons on IntelliMouse Explorer
 150  */
 151
 152         if (psmouse->type == PSMOUSE_IMEX) {
 153                 switch (packet[3] & 0xC0) {
 154                         case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
 155                                 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 156                                 break;
 157                         case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
 158                                 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 159                                 break;
 160                         case 0x00:
 161                         case 0xC0:
 162                                 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
 163                                 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
 164                                 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
 165                                 break;
 166                 }
 167         }
 168
 169 /*
 170  * Extra buttons on Genius NewNet 3D
 171  */
 172
 173         if (psmouse->type == PSMOUSE_GENPS) {
 174                 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
 175                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
 176         }
 177
 178 /*
 179  * Extra button on ThinkingMouse
 180  */
 181         if (psmouse->type == PSMOUSE_THINKPS) {
 182                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
 183                 /* Without this bit of weirdness moving up gives wildly high Y changes. */
 184                 packet[1] |= (packet[0] & 0x40) << 1;
 185         }
 186
 187 /*
 188  * Generic PS/2 Mouse
 189  */
 190
 191         input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
 192         input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 193         input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);
 194
 195         input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
 196         input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
 197
 198         input_sync(dev);
 199
 200         return PSMOUSE_FULL_PACKET;
 201 }
 202
 203 /*
 204  * __psmouse_set_state() sets new psmouse state and resets all flags.
 205  */
 206
 207 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 208 {
 209         psmouse->state = new_state;
 210         psmouse->pktcnt = psmouse->out_of_sync = 0;
 211         psmouse->ps2dev.flags = 0;
 212         psmouse->last = jiffies;
 213 }
 214
 215
 216 /*
 217  * psmouse_set_state() sets new psmouse state and resets all flags and
 218  * counters while holding serio lock so fighting with interrupt handler
 219  * is not a concern.
 220  */
 221
 222 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 223 {
 224         serio_pause_rx(psmouse->ps2dev.serio);
 225         __psmouse_set_state(psmouse, new_state);
 226         serio_continue_rx(psmouse->ps2dev.serio);
 227 }
 228
 229 /*
 230  * psmouse_handle_byte() processes one byte of the input data stream
 231  * by calling corresponding protocol handler.
 232  */
 233
 234 static int psmouse_handle_byte(struct psmouse *psmouse, struct pt_regs *regs)
 235 {
 236         psmouse_ret_t rc = psmouse->protocol_handler(psmouse, regs);
 237
 238         switch (rc) {
 239                 case PSMOUSE_BAD_DATA:
 240                         if (psmouse->state == PSMOUSE_ACTIVATED) {
 241                                 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
 242                                         psmouse->name, psmouse->phys, psmouse->pktcnt);
 243                                 if (++psmouse->out_of_sync == psmouse->resetafter) {
 244                                         __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 245                                         printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
 246                                         serio_reconnect(psmouse->ps2dev.serio);
 247                                         return -1;
 248                                 }
 249                         }
 250                         psmouse->pktcnt = 0;
 251                         break;
 252
 253                 case PSMOUSE_FULL_PACKET:
 254                         psmouse->pktcnt = 0;
 255                         if (psmouse->out_of_sync) {
 256                                 psmouse->out_of_sync = 0;
 257                                 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
 258                                         psmouse->name, psmouse->phys);
 259                         }
 260                         break;
 261
 262                 case PSMOUSE_GOOD_DATA:
 263                         break;
 264         }
 265         return 0;
 266 }
 267
 268 /*
 269  * psmouse_interrupt() handles incoming characters, either passing them
 270  * for normal processing or gathering them as command response.
 271  */
 272
 273 static irqreturn_t psmouse_interrupt(struct serio *serio,
 274                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 275 {
 276         struct psmouse *psmouse = serio_get_drvdata(serio);
 277
 278         if (psmouse->state == PSMOUSE_IGNORE)
 279                 goto out;
 280
 281         if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
 282                 if (psmouse->state == PSMOUSE_ACTIVATED)
 283                         printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
 284                                 flags & SERIO_TIMEOUT ? " timeout" : "",
 285                                 flags & SERIO_PARITY ? " bad parity" : "");
 286                 ps2_cmd_aborted(&psmouse->ps2dev);
 287                 goto out;
 288         }
 289
 290         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
 291                 if  (ps2_handle_ack(&psmouse->ps2dev, data))
 292                         goto out;
 293
 294         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
 295                 if  (ps2_handle_response(&psmouse->ps2dev, data))
 296                         goto out;
 297
 298         if (psmouse->state <= PSMOUSE_RESYNCING)
 299                 goto out;
 300
 301         if (psmouse->state == PSMOUSE_ACTIVATED &&
 302             psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
 303                 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
 304                        psmouse->name, psmouse->phys, psmouse->pktcnt);
 305                 psmouse->badbyte = psmouse->packet[0];
 306                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 307                 queue_work(kpsmoused_wq, &psmouse->resync_work);
 308                 goto out;
 309         }
 310
 311         psmouse->packet[psmouse->pktcnt++] = data;
 312 /*
 313  * Check if this is a new device announcement (0xAA 0x00)
 314  */
 315         if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
 316                 if (psmouse->pktcnt == 1) {
 317                         psmouse->last = jiffies;
 318                         goto out;
 319                 }
 320
 321                 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
 322                         __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 323                         serio_reconnect(serio);
 324                         goto out;
 325                 }
 326 /*
 327  * Not a new device, try processing first byte normally
 328  */
 329                 psmouse->pktcnt = 1;
 330                 if (psmouse_handle_byte(psmouse, regs))
 331                         goto out;
 332
 333                 psmouse->packet[psmouse->pktcnt++] = data;
 334         }
 335
 336 /*
 337  * See if we need to force resync because mouse was idle for too long
 338  */
 339         if (psmouse->state == PSMOUSE_ACTIVATED &&
 340             psmouse->pktcnt == 1 && psmouse->resync_time &&
 341             time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
 342                 psmouse->badbyte = psmouse->packet[0];
 343                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 344                 queue_work(kpsmoused_wq, &psmouse->resync_work);
 345                 goto out;
 346         }
 347
 348         psmouse->last = jiffies;
 349         psmouse_handle_byte(psmouse, regs);
 350
 351  out:
 352         return IRQ_HANDLED;
 353 }
 354
 355
 356 /*
 357  * psmouse_sliced_command() sends an extended PS/2 command to the mouse
 358  * using sliced syntax, understood by advanced devices, such as Logitech
 359  * or Synaptics touchpads. The command is encoded as:
 360  * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
 361  * is the command.
 362  */
 363 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
 364 {
 365         int i;
 366
 367         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
 368                 return -1;
 369
 370         for (i = 6; i >= 0; i -= 2) {
 371                 unsigned char d = (command >> i) & 3;
 372                 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
 373                         return -1;
 374         }
 375
 376         return 0;
 377 }
 378
 379
 380 /*
 381  * psmouse_reset() resets the mouse into power-on state.
 382  */
 383 int psmouse_reset(struct psmouse *psmouse)
 384 {
 385         unsigned char param[2];
 386
 387         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
 388                 return -1;
 389
 390         if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
 391                 return -1;
 392
 393         return 0;
 394 }
 395
 396
 397 /*
 398  * Genius NetMouse magic init.
 399  */
 400 static int genius_detect(struct psmouse *psmouse, int set_properties)
 401 {
 402         struct ps2dev *ps2dev = &psmouse->ps2dev;
 403         unsigned char param[4];
 404
 405         param[0] = 3;
 406         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 407         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 408         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 409         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 410         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 411
 412         if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
 413                 return -1;
 414
 415         if (set_properties) {
 416                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 417                 set_bit(BTN_SIDE, psmouse->dev->keybit);
 418                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 419
 420                 psmouse->vendor = "Genius";
 421                 psmouse->name = "Mouse";
 422                 psmouse->pktsize = 4;
 423         }
 424
 425         return 0;
 426 }
 427
 428 /*
 429  * IntelliMouse magic init.
 430  */
 431 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
 432 {
 433         struct ps2dev *ps2dev = &psmouse->ps2dev;
 434         unsigned char param[2];
 435
 436         param[0] = 200;
 437         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 438         param[0] = 100;
 439         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 440         param[0] =  80;
 441         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 442         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 443
 444         if (param[0] != 3)
 445                 return -1;
 446
 447         if (set_properties) {
 448                 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 449                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 450
 451                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 452                 if (!psmouse->name) psmouse->name = "Wheel Mouse";
 453                 psmouse->pktsize = 4;
 454         }
 455
 456         return 0;
 457 }
 458
 459 /*
 460  * Try IntelliMouse/Explorer magic init.
 461  */
 462 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
 463 {
 464         struct ps2dev *ps2dev = &psmouse->ps2dev;
 465         unsigned char param[2];
 466
 467         intellimouse_detect(psmouse, 0);
 468
 469         param[0] = 200;
 470         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 471         param[0] = 200;
 472         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 473         param[0] =  80;
 474         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 475         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 476
 477         if (param[0] != 4)
 478                 return -1;
 479
 480 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
 481         param[0] = 200;
 482         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 483         param[0] =  80;
 484         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 485         param[0] =  40;
 486         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 487
 488         if (set_properties) {
 489                 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 490                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 491                 set_bit(REL_HWHEEL, psmouse->dev->relbit);
 492                 set_bit(BTN_SIDE, psmouse->dev->keybit);
 493                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 494
 495                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 496                 if (!psmouse->name) psmouse->name = "Explorer Mouse";
 497                 psmouse->pktsize = 4;
 498         }
 499
 500         return 0;
 501 }
 502
 503 /*
 504  * Kensington ThinkingMouse / ExpertMouse magic init.
 505  */
 506 static int thinking_detect(struct psmouse *psmouse, int set_properties)
 507 {
 508         struct ps2dev *ps2dev = &psmouse->ps2dev;
 509         unsigned char param[2];
 510         static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
 511         int i;
 512
 513         param[0] = 10;
 514         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 515         param[0] = 0;
 516         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 517         for (i = 0; i < ARRAY_SIZE(seq); i++) {
 518                 param[0] = seq[i];
 519                 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 520         }
 521         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 522
 523         if (param[0] != 2)
 524                 return -1;
 525
 526         if (set_properties) {
 527                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 528
 529                 psmouse->vendor = "Kensington";
 530                 psmouse->name = "ThinkingMouse";
 531         }
 532
 533         return 0;
 534 }
 535
 536 /*
 537  * Bare PS/2 protocol "detection". Always succeeds.
 538  */
 539 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
 540 {
 541         if (set_properties) {
 542                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 543                 if (!psmouse->name) psmouse->name = "Mouse";
 544         }
 545
 546         return 0;
 547 }
 548
 549
 550 /*
 551  * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
 552  * the mouse may have.
 553  */
 554
 555 static int psmouse_extensions(struct psmouse *psmouse,
 556                               unsigned int max_proto, int set_properties)
 557 {
 558         int synaptics_hardware = 0;
 559
 560 /*
 561  * We always check for lifebook because it does not disturb mouse
 562  * (it only checks DMI information).
 563  */
 564         if (lifebook_detect(psmouse, set_properties) == 0) {
 565                 if (max_proto > PSMOUSE_IMEX) {
 566                         if (!set_properties || lifebook_init(psmouse) == 0)
 567                                 return PSMOUSE_LIFEBOOK;
 568                 }
 569         }
 570
 571 /*
 572  * Try Kensington ThinkingMouse (we try first, because synaptics probe
 573  * upsets the thinkingmouse).
 574  */
 575
 576         if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
 577                 return PSMOUSE_THINKPS;
 578
 579 /*
 580  * Try Synaptics TouchPad
 581  */
 582         if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
 583                 synaptics_hardware = 1;
 584
 585                 if (max_proto > PSMOUSE_IMEX) {
 586                         if (!set_properties || synaptics_init(psmouse) == 0)
 587                                 return PSMOUSE_SYNAPTICS;
 588 /*
 589  * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
 590  * Unfortunately Logitech/Genius probes confuse some firmware versions so
 591  * we'll have to skip them.
 592  */
 593                         max_proto = PSMOUSE_IMEX;
 594                 }
 595 /*
 596  * Make sure that touchpad is in relative mode, gestures (taps) are enabled
 597  */
 598                 synaptics_reset(psmouse);
 599         }
 600
 601 /*
 602  * Try ALPS TouchPad
 603  */
 604         if (max_proto > PSMOUSE_IMEX) {
 605                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 606                 if (alps_detect(psmouse, set_properties) == 0) {
 607                         if (!set_properties || alps_init(psmouse) == 0)
 608                                 return PSMOUSE_ALPS;
 609 /*
 610  * Init failed, try basic relative protocols
 611  */
 612                         max_proto = PSMOUSE_IMEX;
 613                 }
 614         }
 615
 616         if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
 617                 return PSMOUSE_GENPS;
 618
 619         if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
 620                 return PSMOUSE_PS2PP;
 621
 622         if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
 623                 return PSMOUSE_TRACKPOINT;
 624
 625 /*
 626  * Reset to defaults in case the device got confused by extended
 627  * protocol probes. Note that we do full reset becuase some mice
 628  * put themselves to sleep when see PSMOUSE_RESET_DIS.
 629  */
 630         psmouse_reset(psmouse);
 631
 632         if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
 633                 return PSMOUSE_IMEX;
 634
 635         if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
 636                 return PSMOUSE_IMPS;
 637
 638 /*
 639  * Okay, all failed, we have a standard mouse here. The number of the buttons
 640  * is still a question, though. We assume 3.
 641  */
 642         ps2bare_detect(psmouse, set_properties);
 643
 644         if (synaptics_hardware) {
 645 /*
 646  * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
 647  * We need to reset the touchpad because if there is a track point on the
 648  * pass through port it could get disabled while probing for protocol
 649  * extensions.
 650  */
 651                 psmouse_reset(psmouse);
 652         }
 653
 654         return PSMOUSE_PS2;
 655 }
 656
 657 static const struct psmouse_protocol psmouse_protocols[] = {
 658         {
 659                 .type           = PSMOUSE_PS2,
 660                 .name           = "PS/2",
 661                 .alias          = "bare",
 662                 .maxproto       = 1,
 663                 .detect         = ps2bare_detect,
 664         },
 665         {
 666                 .type           = PSMOUSE_PS2PP,
 667                 .name           = "PS2++",
 668                 .alias          = "logitech",
 669                 .detect         = ps2pp_init,
 670         },
 671         {
 672                 .type           = PSMOUSE_THINKPS,
 673                 .name           = "ThinkPS/2",
 674                 .alias          = "thinkps",
 675                 .detect         = thinking_detect,
 676         },
 677         {
 678                 .type           = PSMOUSE_GENPS,
 679                 .name           = "GenPS/2",
 680                 .alias          = "genius",
 681                 .detect         = genius_detect,
 682         },
 683         {
 684                 .type           = PSMOUSE_IMPS,
 685                 .name           = "ImPS/2",
 686                 .alias          = "imps",
 687                 .maxproto       = 1,
 688                 .detect         = intellimouse_detect,
 689         },
 690         {
 691                 .type           = PSMOUSE_IMEX,
 692                 .name           = "ImExPS/2",
 693                 .alias          = "exps",
 694                 .maxproto       = 1,
 695                 .detect         = im_explorer_detect,
 696         },
 697         {
 698                 .type           = PSMOUSE_SYNAPTICS,
 699                 .name           = "SynPS/2",
 700                 .alias          = "synaptics",
 701                 .detect         = synaptics_detect,
 702                 .init           = synaptics_init,
 703         },
 704         {
 705                 .type           = PSMOUSE_ALPS,
 706                 .name           = "AlpsPS/2",
 707                 .alias          = "alps",
 708                 .detect         = alps_detect,
 709                 .init           = alps_init,
 710         },
 711         {
 712                 .type           = PSMOUSE_LIFEBOOK,
 713                 .name           = "LBPS/2",
 714                 .alias          = "lifebook",
 715                 .init           = lifebook_init,
 716         },
 717         {
 718                 .type           = PSMOUSE_TRACKPOINT,
 719                 .name           = "TPPS/2",
 720                 .alias          = "trackpoint",
 721                 .detect         = trackpoint_detect,
 722         },
 723         {
 724                 .type           = PSMOUSE_AUTO,
 725                 .name           = "auto",
 726                 .alias          = "any",
 727                 .maxproto       = 1,
 728         },
 729 };
 730
 731 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
 732 {
 733         int i;
 734
 735         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
 736                 if (psmouse_protocols[i].type == type)
 737                         return &psmouse_protocols[i];
 738
 739         WARN_ON(1);
 740         return &psmouse_protocols[0];
 741 }
 742
 743 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
 744 {
 745         const struct psmouse_protocol *p;
 746         int i;
 747
 748         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
 749                 p = &psmouse_protocols[i];
 750
 751                 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
 752                     (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
 753                         return &psmouse_protocols[i];
 754         }
 755
 756         return NULL;
 757 }
 758
 759
 760 /*
 761  * psmouse_probe() probes for a PS/2 mouse.
 762  */
 763
 764 static int psmouse_probe(struct psmouse *psmouse)
 765 {
 766         struct ps2dev *ps2dev = &psmouse->ps2dev;
 767         unsigned char param[2];
 768
 769 /*
 770  * First, we check if it's a mouse. It should send 0x00 or 0x03
 771  * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
 772  * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
 773  * ID queries, probably due to a firmware bug.
 774  */
 775
 776         param[0] = 0xa5;
 777         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
 778                 return -1;
 779
 780         if (param[0] != 0x00 && param[0] != 0x03 &&
 781             param[0] != 0x04 && param[0] != 0xff)
 782                 return -1;
 783
 784 /*
 785  * Then we reset and disable the mouse so that it doesn't generate events.
 786  */
 787
 788         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
 789                 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
 790
 791         return 0;
 792 }
 793
 794 /*
 795  * Here we set the mouse resolution.
 796  */
 797
 798 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 799 {
 800         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
 801         unsigned char p;
 802
 803         if (resolution == 0 || resolution > 200)
 804                 resolution = 200;
 805
 806         p = params[resolution / 50];
 807         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
 808         psmouse->resolution = 25 << p;
 809 }
 810
 811 /*
 812  * Here we set the mouse report rate.
 813  */
 814
 815 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
 816 {
 817         static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
 818         unsigned char r;
 819         int i = 0;
 820
 821         while (rates[i] > rate) i++;
 822         r = rates[i];
 823         ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
 824         psmouse->rate = r;
 825 }
 826
 827 /*
 828  * psmouse_initialize() initializes the mouse to a sane state.
 829  */
 830
 831 static void psmouse_initialize(struct psmouse *psmouse)
 832 {
 833 /*
 834  * We set the mouse into streaming mode.
 835  */
 836
 837         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
 838
 839 /*
 840  * We set the mouse report rate, resolution and scaling.
 841  */
 842
 843         if (psmouse_max_proto != PSMOUSE_PS2) {
 844                 psmouse->set_rate(psmouse, psmouse->rate);
 845                 psmouse->set_resolution(psmouse, psmouse->resolution);
 846                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
 847         }
 848 }
 849
 850 /*
 851  * psmouse_activate() enables the mouse so that we get motion reports from it.
 852  */
 853
 854 static void psmouse_activate(struct psmouse *psmouse)
 855 {
 856         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 857                 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
 858                         psmouse->ps2dev.serio->phys);
 859
 860         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 861 }
 862
 863
 864 /*
 865  * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
 866  * reports from it unless we explicitely request it.
 867  */
 868
 869 static void psmouse_deactivate(struct psmouse *psmouse)
 870 {
 871         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 872                 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
 873                         psmouse->ps2dev.serio->phys);
 874
 875         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 876 }
 877
 878 /*
 879  * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
 880  */
 881
 882 static int psmouse_poll(struct psmouse *psmouse)
 883 {
 884         return ps2_command(&psmouse->ps2dev, psmouse->packet,
 885                            PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
 886 }
 887
 888
 889 /*
 890  * psmouse_resync() attempts to re-validate current protocol.
 891  */
 892
 893 static void psmouse_resync(void *p)
 894 {
 895         struct psmouse *psmouse = p, *parent = NULL;
 896         struct serio *serio = psmouse->ps2dev.serio;
 897         psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
 898         int failed = 0, enabled = 0;
 899         int i;
 900
 901         mutex_lock(&psmouse_mutex);
 902
 903         if (psmouse->state != PSMOUSE_RESYNCING)
 904                 goto out;
 905
 906         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 907                 parent = serio_get_drvdata(serio->parent);
 908                 psmouse_deactivate(parent);
 909         }
 910
 911 /*
 912  * Some mice don't ACK commands sent while they are in the middle of
 913  * transmitting motion packet. To avoid delay we use ps2_sendbyte()
 914  * instead of ps2_command() which would wait for 200ms for an ACK
 915  * that may never come.
 916  * As an additional quirk ALPS touchpads may not only forget to ACK
 917  * disable command but will stop reporting taps, so if we see that
 918  * mouse at least once ACKs disable we will do full reconnect if ACK
 919  * is missing.
 920  */
 921         psmouse->num_resyncs++;
 922
 923         if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
 924                 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
 925                         failed = 1;
 926         } else
 927                 psmouse->acks_disable_command = 1;
 928
 929 /*
 930  * Poll the mouse. If it was reset the packet will be shorter than
 931  * psmouse->pktsize and ps2_command will fail. We do not expect and
 932  * do not handle scenario when mouse "upgrades" its protocol while
 933  * disconnected since it would require additional delay. If we ever
 934  * see a mouse that does it we'll adjust the code.
 935  */
 936         if (!failed) {
 937                 if (psmouse->poll(psmouse))
 938                         failed = 1;
 939                 else {
 940                         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 941                         for (i = 0; i < psmouse->pktsize; i++) {
 942                                 psmouse->pktcnt++;
 943                                 rc = psmouse->protocol_handler(psmouse, NULL);
 944                                 if (rc != PSMOUSE_GOOD_DATA)
 945                                         break;
 946                         }
 947                         if (rc != PSMOUSE_FULL_PACKET)
 948                                 failed = 1;
 949                         psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 950                 }
 951         }
 952 /*
 953  * Now try to enable mouse. We try to do that even if poll failed and also
 954  * repeat our attempts 5 times, otherwise we may be left out with disabled
 955  * mouse.
 956  */
 957         for (i = 0; i < 5; i++) {
 958                 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
 959                         enabled = 1;
 960                         break;
 961                 }
 962                 msleep(200);
 963         }
 964
 965         if (!enabled) {
 966                 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
 967                         psmouse->ps2dev.serio->phys);
 968                 failed = 1;
 969         }
 970
 971         if (failed) {
 972                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 973                 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
 974                 serio_reconnect(serio);
 975         } else
 976                 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 977
 978         if (parent)
 979                 psmouse_activate(parent);
 980  out:
 981         mutex_unlock(&psmouse_mutex);
 982 }
 983
 984 /*
 985  * psmouse_cleanup() resets the mouse into power-on state.
 986  */
 987
 988 static void psmouse_cleanup(struct serio *serio)
 989 {
 990         struct psmouse *psmouse = serio_get_drvdata(serio);
 991
 992         psmouse_reset(psmouse);
 993 }
 994
 995 /*
 996  * psmouse_disconnect() closes and frees.
 997  */
 998
 999 static void psmouse_disconnect(struct serio *serio)
1000 {
1001         struct psmouse *psmouse, *parent = NULL;
1002
1003         psmouse = serio_get_drvdata(serio);
1004
1005         sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1006
1007         mutex_lock(&psmouse_mutex);
1008
1009         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1010
1011         /* make sure we don't have a resync in progress */
1012         mutex_unlock(&psmouse_mutex);
1013         flush_workqueue(kpsmoused_wq);
1014         mutex_lock(&psmouse_mutex);
1015
1016         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1017                 parent = serio_get_drvdata(serio->parent);
1018                 psmouse_deactivate(parent);
1019         }
1020
1021         if (psmouse->disconnect)
1022                 psmouse->disconnect(psmouse);
1023
1024         if (parent && parent->pt_deactivate)
1025                 parent->pt_deactivate(parent);
1026
1027         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1028
1029         serio_close(serio);
1030         serio_set_drvdata(serio, NULL);
1031         input_unregister_device(psmouse->dev);
1032         kfree(psmouse);
1033
1034         if (parent)
1035                 psmouse_activate(parent);
1036
1037         mutex_unlock(&psmouse_mutex);
1038 }
1039
1040 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1041 {
1042         struct input_dev *input_dev = psmouse->dev;
1043
1044         input_dev->private = psmouse;
1045         input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1046
1047         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1048         input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1049         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1050
1051         psmouse->set_rate = psmouse_set_rate;
1052         psmouse->set_resolution = psmouse_set_resolution;
1053         psmouse->poll = psmouse_poll;
1054         psmouse->protocol_handler = psmouse_process_byte;
1055         psmouse->pktsize = 3;
1056
1057         if (proto && (proto->detect || proto->init)) {
1058                 if (proto->detect && proto->detect(psmouse, 1) < 0)
1059                         return -1;
1060
1061                 if (proto->init && proto->init(psmouse) < 0)
1062                         return -1;
1063
1064                 psmouse->type = proto->type;
1065         }
1066         else
1067                 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1068
1069         /*
1070          * If mouse's packet size is 3 there is no point in polling the
1071          * device in hopes to detect protocol reset - we won't get less
1072          * than 3 bytes response anyhow.
1073          */
1074         if (psmouse->pktsize == 3)
1075                 psmouse->resync_time = 0;
1076
1077         /*
1078          * Some smart KVMs fake response to POLL command returning just
1079          * 3 bytes and messing up our resync logic, so if initial poll
1080          * fails we won't try polling the device anymore. Hopefully
1081          * such KVM will maintain initially selected protocol.
1082          */
1083         if (psmouse->resync_time && psmouse->poll(psmouse))
1084                 psmouse->resync_time = 0;
1085
1086         snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1087                  psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1088
1089         input_dev->name = psmouse->devname;
1090         input_dev->phys = psmouse->phys;
1091         input_dev->id.bustype = BUS_I8042;
1092         input_dev->id.vendor = 0x0002;
1093         input_dev->id.product = psmouse->type;
1094         input_dev->id.version = psmouse->model;
1095
1096         return 0;
1097 }
1098
1099 /*
1100  * psmouse_connect() is a callback from the serio module when
1101  * an unhandled serio port is found.
1102  */
1103 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1104 {
1105         struct psmouse *psmouse, *parent = NULL;
1106         struct input_dev *input_dev;
1107         int retval = -ENOMEM;
1108
1109         mutex_lock(&psmouse_mutex);
1110
1111         /*
1112          * If this is a pass-through port deactivate parent so the device
1113          * connected to this port can be successfully identified
1114          */
1115         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1116                 parent = serio_get_drvdata(serio->parent);
1117                 psmouse_deactivate(parent);
1118         }
1119
1120         psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1121         input_dev = input_allocate_device();
1122         if (!psmouse || !input_dev)
1123                 goto out;
1124
1125         ps2_init(&psmouse->ps2dev, serio);
1126         INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
1127         psmouse->dev = input_dev;
1128         snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1129
1130         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1131
1132         serio_set_drvdata(serio, psmouse);
1133
1134         retval = serio_open(serio, drv);
1135         if (retval)
1136                 goto out;
1137
1138         if (psmouse_probe(psmouse) < 0) {
1139                 serio_close(serio);
1140                 retval = -ENODEV;
1141                 goto out;
1142         }
1143
1144         psmouse->rate = psmouse_rate;
1145         psmouse->resolution = psmouse_resolution;
1146         psmouse->resetafter = psmouse_resetafter;
1147         psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1148         psmouse->smartscroll = psmouse_smartscroll;
1149
1150         psmouse_switch_protocol(psmouse, NULL);
1151
1152         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1153         psmouse_initialize(psmouse);
1154
1155         input_register_device(psmouse->dev);
1156
1157         if (parent && parent->pt_activate)
1158                 parent->pt_activate(parent);
1159
1160         sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1161
1162         psmouse_activate(psmouse);
1163
1164         retval = 0;
1165
1166 out:
1167         if (retval) {
1168                 serio_set_drvdata(serio, NULL);
1169                 input_free_device(input_dev);
1170                 kfree(psmouse);
1171         }
1172
1173         /* If this is a pass-through port the parent needs to be re-activated */
1174         if (parent)
1175                 psmouse_activate(parent);
1176
1177         mutex_unlock(&psmouse_mutex);
1178         return retval;
1179 }
1180
1181
1182 static int psmouse_reconnect(struct serio *serio)
1183 {
1184         struct psmouse *psmouse = serio_get_drvdata(serio);
1185         struct psmouse *parent = NULL;
1186         struct serio_driver *drv = serio->drv;
1187         int rc = -1;
1188
1189         if (!drv || !psmouse) {
1190                 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1191                 return -1;
1192         }
1193
1194         mutex_lock(&psmouse_mutex);
1195
1196         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1197                 parent = serio_get_drvdata(serio->parent);
1198                 psmouse_deactivate(parent);
1199         }
1200
1201         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1202
1203         if (psmouse->reconnect) {
1204                 if (psmouse->reconnect(psmouse))
1205                         goto out;
1206         } else if (psmouse_probe(psmouse) < 0 ||
1207                    psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1208                 goto out;
1209
1210         /* ok, the device type (and capabilities) match the old one,
1211          * we can continue using it, complete intialization
1212          */
1213         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1214
1215         psmouse_initialize(psmouse);
1216
1217         if (parent && parent->pt_activate)
1218                 parent->pt_activate(parent);
1219
1220         psmouse_activate(psmouse);
1221         rc = 0;
1222
1223 out:
1224         /* If this is a pass-through port the parent waits to be activated */
1225         if (parent)
1226                 psmouse_activate(parent);
1227
1228         mutex_unlock(&psmouse_mutex);
1229         return rc;
1230 }
1231
1232 static struct serio_device_id psmouse_serio_ids[] = {
1233         {
1234                 .type   = SERIO_8042,
1235                 .proto  = SERIO_ANY,
1236                 .id     = SERIO_ANY,
1237                 .extra  = SERIO_ANY,
1238         },
1239         {
1240                 .type   = SERIO_PS_PSTHRU,
1241                 .proto  = SERIO_ANY,
1242                 .id     = SERIO_ANY,
1243                 .extra  = SERIO_ANY,
1244         },
1245         { 0 }
1246 };
1247
1248 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1249
1250 static struct serio_driver psmouse_drv = {
1251         .driver         = {
1252                 .name   = "psmouse",
1253         },
1254         .description    = DRIVER_DESC,
1255         .id_table       = psmouse_serio_ids,
1256         .interrupt      = psmouse_interrupt,
1257         .connect        = psmouse_connect,
1258         .reconnect      = psmouse_reconnect,
1259         .disconnect     = psmouse_disconnect,
1260         .cleanup        = psmouse_cleanup,
1261 };
1262
1263 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1264                                  char *buf)
1265 {
1266         struct serio *serio = to_serio_port(dev);
1267         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1268         struct psmouse *psmouse;
1269         int retval;
1270
1271         retval = serio_pin_driver(serio);
1272         if (retval)
1273                 return retval;
1274
1275         if (serio->drv != &psmouse_drv) {
1276                 retval = -ENODEV;
1277                 goto out;
1278         }
1279
1280         psmouse = serio_get_drvdata(serio);
1281
1282         retval = attr->show(psmouse, attr->data, buf);
1283
1284 out:
1285         serio_unpin_driver(serio);
1286         return retval;
1287 }
1288
1289 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1290                                 const char *buf, size_t count)
1291 {
1292         struct serio *serio = to_serio_port(dev);
1293         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1294         struct psmouse *psmouse, *parent = NULL;
1295         int retval;
1296
1297         retval = serio_pin_driver(serio);
1298         if (retval)
1299                 return retval;
1300
1301         if (serio->drv != &psmouse_drv) {
1302                 retval = -ENODEV;
1303                 goto out_unpin;
1304         }
1305
1306         retval = mutex_lock_interruptible(&psmouse_mutex);
1307         if (retval)
1308                 goto out_unpin;
1309
1310         psmouse = serio_get_drvdata(serio);
1311
1312         if (psmouse->state == PSMOUSE_IGNORE) {
1313                 retval = -ENODEV;
1314                 goto out_unlock;
1315         }
1316
1317         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1318                 parent = serio_get_drvdata(serio->parent);
1319                 psmouse_deactivate(parent);
1320         }
1321
1322         psmouse_deactivate(psmouse);
1323
1324         retval = attr->set(psmouse, attr->data, buf, count);
1325
1326         if (retval != -ENODEV)
1327                 psmouse_activate(psmouse);
1328
1329         if (parent)
1330                 psmouse_activate(parent);
1331
1332  out_unlock:
1333         mutex_unlock(&psmouse_mutex);
1334  out_unpin:
1335         serio_unpin_driver(serio);
1336         return retval;
1337 }
1338
1339 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1340 {
1341         unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1342
1343         return sprintf(buf, "%lu\n", *field);
1344 }
1345
1346 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1347 {
1348         unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1349         unsigned long value;
1350         char *rest;
1351
1352         value = simple_strtoul(buf, &rest, 10);
1353         if (*rest)
1354                 return -EINVAL;
1355
1356         *field = value;
1357
1358         return count;
1359 }
1360
1361 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1362 {
1363         return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1364 }
1365
1366 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1367 {
1368         struct serio *serio = psmouse->ps2dev.serio;
1369         struct psmouse *parent = NULL;
1370         struct input_dev *new_dev;
1371         const struct psmouse_protocol *proto;
1372         int retry = 0;
1373
1374         if (!(proto = psmouse_protocol_by_name(buf, count)))
1375                 return -EINVAL;
1376
1377         if (psmouse->type == proto->type)
1378                 return count;
1379
1380         if (!(new_dev = input_allocate_device()))
1381                 return -ENOMEM;
1382
1383         while (serio->child) {
1384                 if (++retry > 3) {
1385                         printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1386                         input_free_device(new_dev);
1387                         return -EIO;
1388                 }
1389
1390                 mutex_unlock(&psmouse_mutex);
1391                 serio_unpin_driver(serio);
1392                 serio_unregister_child_port(serio);
1393                 serio_pin_driver_uninterruptible(serio);
1394                 mutex_lock(&psmouse_mutex);
1395
1396                 if (serio->drv != &psmouse_drv) {
1397                         input_free_device(new_dev);
1398                         return -ENODEV;
1399                 }
1400
1401                 if (psmouse->type == proto->type) {
1402                         input_free_device(new_dev);
1403                         return count; /* switched by other thread */
1404                 }
1405         }
1406
1407         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1408                 parent = serio_get_drvdata(serio->parent);
1409                 if (parent->pt_deactivate)
1410                         parent->pt_deactivate(parent);
1411         }
1412
1413         if (psmouse->disconnect)
1414                 psmouse->disconnect(psmouse);
1415
1416         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1417         input_unregister_device(psmouse->dev);
1418
1419         psmouse->dev = new_dev;
1420         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1421
1422         if (psmouse_switch_protocol(psmouse, proto) < 0) {
1423                 psmouse_reset(psmouse);
1424                 /* default to PSMOUSE_PS2 */
1425                 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1426         }
1427
1428         psmouse_initialize(psmouse);
1429         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1430
1431         input_register_device(psmouse->dev);
1432
1433         if (parent && parent->pt_activate)
1434                 parent->pt_activate(parent);
1435
1436         return count;
1437 }
1438
1439 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1440 {
1441         unsigned long value;
1442         char *rest;
1443
1444         value = simple_strtoul(buf, &rest, 10);
1445         if (*rest)
1446                 return -EINVAL;
1447
1448         psmouse->set_rate(psmouse, value);
1449         return count;
1450 }
1451
1452 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1453 {
1454         unsigned long value;
1455         char *rest;
1456
1457         value = simple_strtoul(buf, &rest, 10);
1458         if (*rest)
1459                 return -EINVAL;
1460
1461         psmouse->set_resolution(psmouse, value);
1462         return count;
1463 }
1464
1465
1466 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1467 {
1468         const struct psmouse_protocol *proto;
1469
1470         if (!val)
1471                 return -EINVAL;
1472
1473         proto = psmouse_protocol_by_name(val, strlen(val));
1474
1475         if (!proto || !proto->maxproto)
1476                 return -EINVAL;
1477
1478         *((unsigned int *)kp->arg) = proto->type;
1479
1480         return 0;
1481 }
1482
1483 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1484 {
1485         int type = *((unsigned int *)kp->arg);
1486
1487         return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1488 }
1489
1490 static int __init psmouse_init(void)
1491 {
1492         kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1493         if (!kpsmoused_wq) {
1494                 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1495                 return -ENOMEM;
1496         }
1497
1498         serio_register_driver(&psmouse_drv);
1499
1500         return 0;
1501 }
1502
1503 static void __exit psmouse_exit(void)
1504 {
1505         serio_unregister_driver(&psmouse_drv);
1506         destroy_workqueue(kpsmoused_wq);
1507 }
1508
1509 module_init(psmouse_init);
1510 module_exit(psmouse_exit);