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 #include "touchkit_ps2.h"
  32
  33 #define DRIVER_DESC     "PS/2 mouse driver"
  34
  35 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  36 MODULE_DESCRIPTION(DRIVER_DESC);
  37 MODULE_LICENSE("GPL");
  38
  39 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
  40 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
  41 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
  42 #define param_check_proto_abbrev(name, p)       __param_check(name, p, unsigned int)
  43 #define param_set_proto_abbrev                  psmouse_set_maxproto
  44 #define param_get_proto_abbrev                  psmouse_get_maxproto
  45 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
  46 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
  47
  48 static unsigned int psmouse_resolution = 200;
  49 module_param_named(resolution, psmouse_resolution, uint, 0644);
  50 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
  51
  52 static unsigned int psmouse_rate = 100;
  53 module_param_named(rate, psmouse_rate, uint, 0644);
  54 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
  55
  56 static unsigned int psmouse_smartscroll = 1;
  57 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
  58 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
  59
  60 static unsigned int psmouse_resetafter = 5;
  61 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
  62 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
  63
  64 static unsigned int psmouse_resync_time;
  65 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
  66 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
  67
  68 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
  69                         NULL,
  70                         psmouse_attr_show_protocol, psmouse_attr_set_protocol);
  71 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
  72                         (void *) offsetof(struct psmouse, rate),
  73                         psmouse_show_int_attr, psmouse_attr_set_rate);
  74 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
  75                         (void *) offsetof(struct psmouse, resolution),
  76                         psmouse_show_int_attr, psmouse_attr_set_resolution);
  77 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
  78                         (void *) offsetof(struct psmouse, resetafter),
  79                         psmouse_show_int_attr, psmouse_set_int_attr);
  80 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
  81                         (void *) offsetof(struct psmouse, resync_time),
  82                         psmouse_show_int_attr, psmouse_set_int_attr);
  83
  84 static struct attribute *psmouse_attributes[] = {
  85         &psmouse_attr_protocol.dattr.attr,
  86         &psmouse_attr_rate.dattr.attr,
  87         &psmouse_attr_resolution.dattr.attr,
  88         &psmouse_attr_resetafter.dattr.attr,
  89         &psmouse_attr_resync_time.dattr.attr,
  90         NULL
  91 };
  92
  93 static struct attribute_group psmouse_attribute_group = {
  94         .attrs  = psmouse_attributes,
  95 };
  96
  97 /*
  98  * psmouse_mutex protects all operations changing state of mouse
  99  * (connecting, disconnecting, changing rate or resolution via
 100  * sysfs). We could use a per-device semaphore but since there
 101  * rarely more than one PS/2 mouse connected and since semaphore
 102  * is taken in "slow" paths it is not worth it.
 103  */
 104 static DEFINE_MUTEX(psmouse_mutex);
 105
 106 static struct workqueue_struct *kpsmoused_wq;
 107
 108 struct psmouse_protocol {
 109         enum psmouse_type type;
 110         const char *name;
 111         const char *alias;
 112         int maxproto;
 113         int (*detect)(struct psmouse *, int);
 114         int (*init)(struct psmouse *);
 115 };
 116
 117 /*
 118  * psmouse_process_byte() analyzes the PS/2 data stream and reports
 119  * relevant events to the input module once full packet has arrived.
 120  */
 121
 122 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
 123 {
 124         struct input_dev *dev = psmouse->dev;
 125         unsigned char *packet = psmouse->packet;
 126
 127         if (psmouse->pktcnt < psmouse->pktsize)
 128                 return PSMOUSE_GOOD_DATA;
 129
 130 /*
 131  * Full packet accumulated, process it
 132  */
 133
 134 /*
 135  * Scroll wheel on IntelliMice, scroll buttons on NetMice
 136  */
 137
 138         if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
 139                 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
 140
 141 /*
 142  * Scroll wheel and buttons on IntelliMouse Explorer
 143  */
 144
 145         if (psmouse->type == PSMOUSE_IMEX) {
 146                 switch (packet[3] & 0xC0) {
 147                         case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
 148                                 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 149                                 break;
 150                         case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
 151                                 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
 152                                 break;
 153                         case 0x00:
 154                         case 0xC0:
 155                                 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
 156                                 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
 157                                 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
 158                                 break;
 159                 }
 160         }
 161
 162 /*
 163  * Extra buttons on Genius NewNet 3D
 164  */
 165
 166         if (psmouse->type == PSMOUSE_GENPS) {
 167                 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
 168                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
 169         }
 170
 171 /*
 172  * Extra button on ThinkingMouse
 173  */
 174         if (psmouse->type == PSMOUSE_THINKPS) {
 175                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
 176                 /* Without this bit of weirdness moving up gives wildly high Y changes. */
 177                 packet[1] |= (packet[0] & 0x40) << 1;
 178         }
 179
 180 /*
 181  * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
 182  * byte.
 183  */
 184         if (psmouse->type == PSMOUSE_CORTRON) {
 185                 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
 186                 packet[0] |= 0x08;
 187         }
 188
 189 /*
 190  * Generic PS/2 Mouse
 191  */
 192
 193         input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
 194         input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 195         input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);
 196
 197         input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
 198         input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
 199
 200         input_sync(dev);
 201
 202         return PSMOUSE_FULL_PACKET;
 203 }
 204
 205 /*
 206  * __psmouse_set_state() sets new psmouse state and resets all flags.
 207  */
 208
 209 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 210 {
 211         psmouse->state = new_state;
 212         psmouse->pktcnt = psmouse->out_of_sync = 0;
 213         psmouse->ps2dev.flags = 0;
 214         psmouse->last = jiffies;
 215 }
 216
 217
 218 /*
 219  * psmouse_set_state() sets new psmouse state and resets all flags and
 220  * counters while holding serio lock so fighting with interrupt handler
 221  * is not a concern.
 222  */
 223
 224 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 225 {
 226         serio_pause_rx(psmouse->ps2dev.serio);
 227         __psmouse_set_state(psmouse, new_state);
 228         serio_continue_rx(psmouse->ps2dev.serio);
 229 }
 230
 231 /*
 232  * psmouse_handle_byte() processes one byte of the input data stream
 233  * by calling corresponding protocol handler.
 234  */
 235
 236 static int psmouse_handle_byte(struct psmouse *psmouse)
 237 {
 238         psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
 239
 240         switch (rc) {
 241                 case PSMOUSE_BAD_DATA:
 242                         if (psmouse->state == PSMOUSE_ACTIVATED) {
 243                                 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
 244                                         psmouse->name, psmouse->phys, psmouse->pktcnt);
 245                                 if (++psmouse->out_of_sync == psmouse->resetafter) {
 246                                         __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 247                                         printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
 248                                         serio_reconnect(psmouse->ps2dev.serio);
 249                                         return -1;
 250                                 }
 251                         }
 252                         psmouse->pktcnt = 0;
 253                         break;
 254
 255                 case PSMOUSE_FULL_PACKET:
 256                         psmouse->pktcnt = 0;
 257                         if (psmouse->out_of_sync) {
 258                                 psmouse->out_of_sync = 0;
 259                                 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
 260                                         psmouse->name, psmouse->phys);
 261                         }
 262                         break;
 263
 264                 case PSMOUSE_GOOD_DATA:
 265                         break;
 266         }
 267         return 0;
 268 }
 269
 270 /*
 271  * psmouse_interrupt() handles incoming characters, either passing them
 272  * for normal processing or gathering them as command response.
 273  */
 274
 275 static irqreturn_t psmouse_interrupt(struct serio *serio,
 276                 unsigned char data, unsigned int flags)
 277 {
 278         struct psmouse *psmouse = serio_get_drvdata(serio);
 279
 280         if (psmouse->state == PSMOUSE_IGNORE)
 281                 goto out;
 282
 283         if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
 284                 if (psmouse->state == PSMOUSE_ACTIVATED)
 285                         printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
 286                                 flags & SERIO_TIMEOUT ? " timeout" : "",
 287                                 flags & SERIO_PARITY ? " bad parity" : "");
 288                 ps2_cmd_aborted(&psmouse->ps2dev);
 289                 goto out;
 290         }
 291
 292         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
 293                 if  (ps2_handle_ack(&psmouse->ps2dev, data))
 294                         goto out;
 295
 296         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
 297                 if  (ps2_handle_response(&psmouse->ps2dev, data))
 298                         goto out;
 299
 300         if (psmouse->state <= PSMOUSE_RESYNCING)
 301                 goto out;
 302
 303         if (psmouse->state == PSMOUSE_ACTIVATED &&
 304             psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
 305                 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
 306                        psmouse->name, psmouse->phys, psmouse->pktcnt);
 307                 psmouse->badbyte = psmouse->packet[0];
 308                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 309                 queue_work(kpsmoused_wq, &psmouse->resync_work);
 310                 goto out;
 311         }
 312
 313         psmouse->packet[psmouse->pktcnt++] = data;
 314 /*
 315  * Check if this is a new device announcement (0xAA 0x00)
 316  */
 317         if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
 318                 if (psmouse->pktcnt == 1) {
 319                         psmouse->last = jiffies;
 320                         goto out;
 321                 }
 322
 323                 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
 324                         __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 325                         serio_reconnect(serio);
 326                         goto out;
 327                 }
 328 /*
 329  * Not a new device, try processing first byte normally
 330  */
 331                 psmouse->pktcnt = 1;
 332                 if (psmouse_handle_byte(psmouse))
 333                         goto out;
 334
 335                 psmouse->packet[psmouse->pktcnt++] = data;
 336         }
 337
 338 /*
 339  * See if we need to force resync because mouse was idle for too long
 340  */
 341         if (psmouse->state == PSMOUSE_ACTIVATED &&
 342             psmouse->pktcnt == 1 && psmouse->resync_time &&
 343             time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
 344                 psmouse->badbyte = psmouse->packet[0];
 345                 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 346                 queue_work(kpsmoused_wq, &psmouse->resync_work);
 347                 goto out;
 348         }
 349
 350         psmouse->last = jiffies;
 351         psmouse_handle_byte(psmouse);
 352
 353  out:
 354         return IRQ_HANDLED;
 355 }
 356
 357
 358 /*
 359  * psmouse_sliced_command() sends an extended PS/2 command to the mouse
 360  * using sliced syntax, understood by advanced devices, such as Logitech
 361  * or Synaptics touchpads. The command is encoded as:
 362  * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
 363  * is the command.
 364  */
 365 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
 366 {
 367         int i;
 368
 369         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
 370                 return -1;
 371
 372         for (i = 6; i >= 0; i -= 2) {
 373                 unsigned char d = (command >> i) & 3;
 374                 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
 375                         return -1;
 376         }
 377
 378         return 0;
 379 }
 380
 381
 382 /*
 383  * psmouse_reset() resets the mouse into power-on state.
 384  */
 385 int psmouse_reset(struct psmouse *psmouse)
 386 {
 387         unsigned char param[2];
 388
 389         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
 390                 return -1;
 391
 392         if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
 393                 return -1;
 394
 395         return 0;
 396 }
 397
 398
 399 /*
 400  * Genius NetMouse magic init.
 401  */
 402 static int genius_detect(struct psmouse *psmouse, int set_properties)
 403 {
 404         struct ps2dev *ps2dev = &psmouse->ps2dev;
 405         unsigned char param[4];
 406
 407         param[0] = 3;
 408         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 409         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 410         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 411         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 412         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 413
 414         if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
 415                 return -1;
 416
 417         if (set_properties) {
 418                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 419                 set_bit(BTN_SIDE, psmouse->dev->keybit);
 420                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 421
 422                 psmouse->vendor = "Genius";
 423                 psmouse->name = "Mouse";
 424                 psmouse->pktsize = 4;
 425         }
 426
 427         return 0;
 428 }
 429
 430 /*
 431  * IntelliMouse magic init.
 432  */
 433 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
 434 {
 435         struct ps2dev *ps2dev = &psmouse->ps2dev;
 436         unsigned char param[2];
 437
 438         param[0] = 200;
 439         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 440         param[0] = 100;
 441         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 442         param[0] =  80;
 443         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 444         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 445
 446         if (param[0] != 3)
 447                 return -1;
 448
 449         if (set_properties) {
 450                 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 451                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 452
 453                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 454                 if (!psmouse->name) psmouse->name = "Wheel Mouse";
 455                 psmouse->pktsize = 4;
 456         }
 457
 458         return 0;
 459 }
 460
 461 /*
 462  * Try IntelliMouse/Explorer magic init.
 463  */
 464 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
 465 {
 466         struct ps2dev *ps2dev = &psmouse->ps2dev;
 467         unsigned char param[2];
 468
 469         intellimouse_detect(psmouse, 0);
 470
 471         param[0] = 200;
 472         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 473         param[0] = 200;
 474         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 475         param[0] =  80;
 476         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 477         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 478
 479         if (param[0] != 4)
 480                 return -1;
 481
 482 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
 483         param[0] = 200;
 484         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 485         param[0] =  80;
 486         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 487         param[0] =  40;
 488         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 489
 490         if (set_properties) {
 491                 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 492                 set_bit(REL_WHEEL, psmouse->dev->relbit);
 493                 set_bit(REL_HWHEEL, psmouse->dev->relbit);
 494                 set_bit(BTN_SIDE, psmouse->dev->keybit);
 495                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 496
 497                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 498                 if (!psmouse->name) psmouse->name = "Explorer Mouse";
 499                 psmouse->pktsize = 4;
 500         }
 501
 502         return 0;
 503 }
 504
 505 /*
 506  * Kensington ThinkingMouse / ExpertMouse magic init.
 507  */
 508 static int thinking_detect(struct psmouse *psmouse, int set_properties)
 509 {
 510         struct ps2dev *ps2dev = &psmouse->ps2dev;
 511         unsigned char param[2];
 512         static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
 513         int i;
 514
 515         param[0] = 10;
 516         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 517         param[0] = 0;
 518         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 519         for (i = 0; i < ARRAY_SIZE(seq); i++) {
 520                 param[0] = seq[i];
 521                 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 522         }
 523         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 524
 525         if (param[0] != 2)
 526                 return -1;
 527
 528         if (set_properties) {
 529                 set_bit(BTN_EXTRA, psmouse->dev->keybit);
 530
 531                 psmouse->vendor = "Kensington";
 532                 psmouse->name = "ThinkingMouse";
 533         }
 534
 535         return 0;
 536 }
 537
 538 /*
 539  * Bare PS/2 protocol "detection". Always succeeds.
 540  */
 541 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
 542 {
 543         if (set_properties) {
 544                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 545                 if (!psmouse->name) psmouse->name = "Mouse";
 546         }
 547
 548         return 0;
 549 }
 550
 551 /*
 552  * Cortron PS/2 protocol detection. There's no special way to detect it, so it
 553  * must be forced by sysfs protocol writing.
 554  */
 555 static int cortron_detect(struct psmouse *psmouse, int set_properties)
 556 {
 557         if (set_properties) {
 558                 psmouse->vendor = "Cortron";
 559                 psmouse->name = "PS/2 Trackball";
 560                 set_bit(BTN_SIDE, psmouse->dev->keybit);
 561         }
 562
 563         return 0;
 564 }
 565
 566 /*
 567  * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
 568  * the mouse may have.
 569  */
 570
 571 static int psmouse_extensions(struct psmouse *psmouse,
 572                               unsigned int max_proto, int set_properties)
 573 {
 574         int synaptics_hardware = 0;
 575
 576 /*
 577  * We always check for lifebook because it does not disturb mouse
 578  * (it only checks DMI information).
 579  */
 580         if (lifebook_detect(psmouse, set_properties) == 0) {
 581                 if (max_proto > PSMOUSE_IMEX) {
 582                         if (!set_properties || lifebook_init(psmouse) == 0)
 583                                 return PSMOUSE_LIFEBOOK;
 584                 }
 585         }
 586
 587 /*
 588  * Try Kensington ThinkingMouse (we try first, because synaptics probe
 589  * upsets the thinkingmouse).
 590  */
 591
 592         if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
 593                 return PSMOUSE_THINKPS;
 594
 595 /*
 596  * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
 597  * support is disabled in config - we need to know if it is synaptics so we
 598  * can reset it properly after probing for intellimouse.
 599  */
 600         if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
 601                 synaptics_hardware = 1;
 602
 603                 if (max_proto > PSMOUSE_IMEX) {
 604                         if (!set_properties || synaptics_init(psmouse) == 0)
 605                                 return PSMOUSE_SYNAPTICS;
 606 /*
 607  * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
 608  * Unfortunately Logitech/Genius probes confuse some firmware versions so
 609  * we'll have to skip them.
 610  */
 611                         max_proto = PSMOUSE_IMEX;
 612                 }
 613 /*
 614  * Make sure that touchpad is in relative mode, gestures (taps) are enabled
 615  */
 616                 synaptics_reset(psmouse);
 617         }
 618
 619 /*
 620  * Try ALPS TouchPad
 621  */
 622         if (max_proto > PSMOUSE_IMEX) {
 623                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 624                 if (alps_detect(psmouse, set_properties) == 0) {
 625                         if (!set_properties || alps_init(psmouse) == 0)
 626                                 return PSMOUSE_ALPS;
 627 /*
 628  * Init failed, try basic relative protocols
 629  */
 630                         max_proto = PSMOUSE_IMEX;
 631                 }
 632         }
 633
 634         if (max_proto > PSMOUSE_IMEX) {
 635
 636                 if (genius_detect(psmouse, set_properties) == 0)
 637                         return PSMOUSE_GENPS;
 638
 639                 if (ps2pp_init(psmouse, set_properties) == 0)
 640                         return PSMOUSE_PS2PP;
 641
 642                 if (trackpoint_detect(psmouse, set_properties) == 0)
 643                         return PSMOUSE_TRACKPOINT;
 644
 645                 if (touchkit_ps2_detect(psmouse, set_properties) == 0)
 646                         return PSMOUSE_TOUCHKIT_PS2;
 647         }
 648
 649 /*
 650  * Reset to defaults in case the device got confused by extended
 651  * protocol probes. Note that we follow up with full reset because
 652  * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
 653  */
 654         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 655         psmouse_reset(psmouse);
 656
 657         if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
 658                 return PSMOUSE_IMEX;
 659
 660         if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
 661                 return PSMOUSE_IMPS;
 662
 663 /*
 664  * Okay, all failed, we have a standard mouse here. The number of the buttons
 665  * is still a question, though. We assume 3.
 666  */
 667         ps2bare_detect(psmouse, set_properties);
 668
 669         if (synaptics_hardware) {
 670 /*
 671  * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
 672  * We need to reset the touchpad because if there is a track point on the
 673  * pass through port it could get disabled while probing for protocol
 674  * extensions.
 675  */
 676                 psmouse_reset(psmouse);
 677         }
 678
 679         return PSMOUSE_PS2;
 680 }
 681
 682 static const struct psmouse_protocol psmouse_protocols[] = {
 683         {
 684                 .type           = PSMOUSE_PS2,
 685                 .name           = "PS/2",
 686                 .alias          = "bare",
 687                 .maxproto       = 1,
 688                 .detect         = ps2bare_detect,
 689         },
 690 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 691         {
 692                 .type           = PSMOUSE_PS2PP,
 693                 .name           = "PS2++",
 694                 .alias          = "logitech",
 695                 .detect         = ps2pp_init,
 696         },
 697 #endif
 698         {
 699                 .type           = PSMOUSE_THINKPS,
 700                 .name           = "ThinkPS/2",
 701                 .alias          = "thinkps",
 702                 .detect         = thinking_detect,
 703         },
 704         {
 705                 .type           = PSMOUSE_GENPS,
 706                 .name           = "GenPS/2",
 707                 .alias          = "genius",
 708                 .detect         = genius_detect,
 709         },
 710         {
 711                 .type           = PSMOUSE_IMPS,
 712                 .name           = "ImPS/2",
 713                 .alias          = "imps",
 714                 .maxproto       = 1,
 715                 .detect         = intellimouse_detect,
 716         },
 717         {
 718                 .type           = PSMOUSE_IMEX,
 719                 .name           = "ImExPS/2",
 720                 .alias          = "exps",
 721                 .maxproto       = 1,
 722                 .detect         = im_explorer_detect,
 723         },
 724 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 725         {
 726                 .type           = PSMOUSE_SYNAPTICS,
 727                 .name           = "SynPS/2",
 728                 .alias          = "synaptics",
 729                 .detect         = synaptics_detect,
 730                 .init           = synaptics_init,
 731         },
 732 #endif
 733 #ifdef CONFIG_MOUSE_PS2_ALPS
 734         {
 735                 .type           = PSMOUSE_ALPS,
 736                 .name           = "AlpsPS/2",
 737                 .alias          = "alps",
 738                 .detect         = alps_detect,
 739                 .init           = alps_init,
 740         },
 741 #endif
 742 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
 743         {
 744                 .type           = PSMOUSE_LIFEBOOK,
 745                 .name           = "LBPS/2",
 746                 .alias          = "lifebook",
 747                 .init           = lifebook_init,
 748         },
 749 #endif
 750 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
 751         {
 752                 .type           = PSMOUSE_TRACKPOINT,
 753                 .name           = "TPPS/2",
 754                 .alias          = "trackpoint",
 755                 .detect         = trackpoint_detect,
 756         },
 757 #endif
 758 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
 759         {
 760                 .type           = PSMOUSE_TOUCHKIT_PS2,
 761                 .name           = "touchkitPS/2",
 762                 .alias          = "touchkit",
 763                 .detect         = touchkit_ps2_detect,
 764         },
 765 #endif
 766         {
 767                 .type           = PSMOUSE_CORTRON,
 768                 .name           = "CortronPS/2",
 769                 .alias          = "cortps",
 770                 .detect         = cortron_detect,
 771         },
 772         {
 773                 .type           = PSMOUSE_AUTO,
 774                 .name           = "auto",
 775                 .alias          = "any",
 776                 .maxproto       = 1,
 777         },
 778 };
 779
 780 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
 781 {
 782         int i;
 783
 784         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
 785                 if (psmouse_protocols[i].type == type)
 786                         return &psmouse_protocols[i];
 787
 788         WARN_ON(1);
 789         return &psmouse_protocols[0];
 790 }
 791
 792 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
 793 {
 794         const struct psmouse_protocol *p;
 795         int i;
 796
 797         for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
 798                 p = &psmouse_protocols[i];
 799
 800                 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
 801                     (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
 802                         return &psmouse_protocols[i];
 803         }
 804
 805         return NULL;
 806 }
 807
 808
 809 /*
 810  * psmouse_probe() probes for a PS/2 mouse.
 811  */
 812
 813 static int psmouse_probe(struct psmouse *psmouse)
 814 {
 815         struct ps2dev *ps2dev = &psmouse->ps2dev;
 816         unsigned char param[2];
 817
 818 /*
 819  * First, we check if it's a mouse. It should send 0x00 or 0x03
 820  * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
 821  * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
 822  * ID queries, probably due to a firmware bug.
 823  */
 824
 825         param[0] = 0xa5;
 826         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
 827                 return -1;
 828
 829         if (param[0] != 0x00 && param[0] != 0x03 &&
 830             param[0] != 0x04 && param[0] != 0xff)
 831                 return -1;
 832
 833 /*
 834  * Then we reset and disable the mouse so that it doesn't generate events.
 835  */
 836
 837         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
 838                 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
 839
 840         return 0;
 841 }
 842
 843 /*
 844  * Here we set the mouse resolution.
 845  */
 846
 847 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 848 {
 849         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
 850         unsigned char p;
 851
 852         if (resolution == 0 || resolution > 200)
 853                 resolution = 200;
 854
 855         p = params[resolution / 50];
 856         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
 857         psmouse->resolution = 25 << p;
 858 }
 859
 860 /*
 861  * Here we set the mouse report rate.
 862  */
 863
 864 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
 865 {
 866         static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
 867         unsigned char r;
 868         int i = 0;
 869
 870         while (rates[i] > rate) i++;
 871         r = rates[i];
 872         ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
 873         psmouse->rate = r;
 874 }
 875
 876 /*
 877  * psmouse_initialize() initializes the mouse to a sane state.
 878  */
 879
 880 static void psmouse_initialize(struct psmouse *psmouse)
 881 {
 882 /*
 883  * We set the mouse report rate, resolution and scaling.
 884  */
 885
 886         if (psmouse_max_proto != PSMOUSE_PS2) {
 887                 psmouse->set_rate(psmouse, psmouse->rate);
 888                 psmouse->set_resolution(psmouse, psmouse->resolution);
 889                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
 890         }
 891 }
 892
 893 /*
 894  * psmouse_activate() enables the mouse so that we get motion reports from it.
 895  */
 896
 897 static void psmouse_activate(struct psmouse *psmouse)
 898 {
 899         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 900                 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
 901                         psmouse->ps2dev.serio->phys);
 902
 903         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 904 }
 905
 906
 907 /*
 908  * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
 909  * reports from it unless we explicitly request it.
 910  */
 911
 912 static void psmouse_deactivate(struct psmouse *psmouse)
 913 {
 914         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 915                 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
 916                         psmouse->ps2dev.serio->phys);
 917
 918         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 919 }
 920
 921 /*
 922  * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
 923  */
 924
 925 static int psmouse_poll(struct psmouse *psmouse)
 926 {
 927         return ps2_command(&psmouse->ps2dev, psmouse->packet,
 928                            PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
 929 }
 930
 931
 932 /*
 933  * psmouse_resync() attempts to re-validate current protocol.
 934  */
 935
 936 static void psmouse_resync(struct work_struct *work)
 937 {
 938         struct psmouse *parent = NULL, *psmouse =
 939                 container_of(work, struct psmouse, resync_work);
 940         struct serio *serio = psmouse->ps2dev.serio;
 941         psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
 942         int failed = 0, enabled = 0;
 943         int i;
 944
 945         mutex_lock(&psmouse_mutex);
 946
 947         if (psmouse->state != PSMOUSE_RESYNCING)
 948                 goto out;
 949
 950         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 951                 parent = serio_get_drvdata(serio->parent);
 952                 psmouse_deactivate(parent);
 953         }
 954
 955 /*
 956  * Some mice don't ACK commands sent while they are in the middle of
 957  * transmitting motion packet. To avoid delay we use ps2_sendbyte()
 958  * instead of ps2_command() which would wait for 200ms for an ACK
 959  * that may never come.
 960  * As an additional quirk ALPS touchpads may not only forget to ACK
 961  * disable command but will stop reporting taps, so if we see that
 962  * mouse at least once ACKs disable we will do full reconnect if ACK
 963  * is missing.
 964  */
 965         psmouse->num_resyncs++;
 966
 967         if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
 968                 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
 969                         failed = 1;
 970         } else
 971                 psmouse->acks_disable_command = 1;
 972
 973 /*
 974  * Poll the mouse. If it was reset the packet will be shorter than
 975  * psmouse->pktsize and ps2_command will fail. We do not expect and
 976  * do not handle scenario when mouse "upgrades" its protocol while
 977  * disconnected since it would require additional delay. If we ever
 978  * see a mouse that does it we'll adjust the code.
 979  */
 980         if (!failed) {
 981                 if (psmouse->poll(psmouse))
 982                         failed = 1;
 983                 else {
 984                         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 985                         for (i = 0; i < psmouse->pktsize; i++) {
 986                                 psmouse->pktcnt++;
 987                                 rc = psmouse->protocol_handler(psmouse);
 988                                 if (rc != PSMOUSE_GOOD_DATA)
 989                                         break;
 990                         }
 991                         if (rc != PSMOUSE_FULL_PACKET)
 992                                 failed = 1;
 993                         psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
 994                 }
 995         }
 996 /*
 997  * Now try to enable mouse. We try to do that even if poll failed and also
 998  * repeat our attempts 5 times, otherwise we may be left out with disabled
 999  * mouse.
1000  */
1001         for (i = 0; i < 5; i++) {
1002                 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1003                         enabled = 1;
1004                         break;
1005                 }
1006                 msleep(200);
1007         }
1008
1009         if (!enabled) {
1010                 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
1011                         psmouse->ps2dev.serio->phys);
1012                 failed = 1;
1013         }
1014
1015         if (failed) {
1016                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1017                 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
1018                 serio_reconnect(serio);
1019         } else
1020                 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1021
1022         if (parent)
1023                 psmouse_activate(parent);
1024  out:
1025         mutex_unlock(&psmouse_mutex);
1026 }
1027
1028 /*
1029  * psmouse_cleanup() resets the mouse into power-on state.
1030  */
1031
1032 static void psmouse_cleanup(struct serio *serio)
1033 {
1034         struct psmouse *psmouse = serio_get_drvdata(serio);
1035         struct psmouse *parent = NULL;
1036
1037         mutex_lock(&psmouse_mutex);
1038
1039         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1040                 parent = serio_get_drvdata(serio->parent);
1041                 psmouse_deactivate(parent);
1042         }
1043
1044         psmouse_deactivate(psmouse);
1045
1046         if (psmouse->cleanup)
1047                 psmouse->cleanup(psmouse);
1048
1049         psmouse_reset(psmouse);
1050
1051 /*
1052  * Some boxes, such as HP nx7400, get terribly confused if mouse
1053  * is not fully enabled before suspending/shutting down.
1054  */
1055         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1056
1057         if (parent) {
1058                 if (parent->pt_deactivate)
1059                         parent->pt_deactivate(parent);
1060
1061                 psmouse_activate(parent);
1062         }
1063
1064         mutex_unlock(&psmouse_mutex);
1065 }
1066
1067 /*
1068  * psmouse_disconnect() closes and frees.
1069  */
1070
1071 static void psmouse_disconnect(struct serio *serio)
1072 {
1073         struct psmouse *psmouse, *parent = NULL;
1074
1075         psmouse = serio_get_drvdata(serio);
1076
1077         sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1078
1079         mutex_lock(&psmouse_mutex);
1080
1081         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1082
1083         /* make sure we don't have a resync in progress */
1084         mutex_unlock(&psmouse_mutex);
1085         flush_workqueue(kpsmoused_wq);
1086         mutex_lock(&psmouse_mutex);
1087
1088         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1089                 parent = serio_get_drvdata(serio->parent);
1090                 psmouse_deactivate(parent);
1091         }
1092
1093         if (psmouse->disconnect)
1094                 psmouse->disconnect(psmouse);
1095
1096         if (parent && parent->pt_deactivate)
1097                 parent->pt_deactivate(parent);
1098
1099         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1100
1101         serio_close(serio);
1102         serio_set_drvdata(serio, NULL);
1103         input_unregister_device(psmouse->dev);
1104         kfree(psmouse);
1105
1106         if (parent)
1107                 psmouse_activate(parent);
1108
1109         mutex_unlock(&psmouse_mutex);
1110 }
1111
1112 static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto)
1113 {
1114         struct input_dev *input_dev = psmouse->dev;
1115
1116         input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1117
1118         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1119         input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
1120                 BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1121         input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1122
1123         psmouse->set_rate = psmouse_set_rate;
1124         psmouse->set_resolution = psmouse_set_resolution;
1125         psmouse->poll = psmouse_poll;
1126         psmouse->protocol_handler = psmouse_process_byte;
1127         psmouse->pktsize = 3;
1128
1129         if (proto && (proto->detect || proto->init)) {
1130                 if (proto->detect && proto->detect(psmouse, 1) < 0)
1131                         return -1;
1132
1133                 if (proto->init && proto->init(psmouse) < 0)
1134                         return -1;
1135
1136                 psmouse->type = proto->type;
1137         }
1138         else
1139                 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1140
1141         /*
1142          * If mouse's packet size is 3 there is no point in polling the
1143          * device in hopes to detect protocol reset - we won't get less
1144          * than 3 bytes response anyhow.
1145          */
1146         if (psmouse->pktsize == 3)
1147                 psmouse->resync_time = 0;
1148
1149         /*
1150          * Some smart KVMs fake response to POLL command returning just
1151          * 3 bytes and messing up our resync logic, so if initial poll
1152          * fails we won't try polling the device anymore. Hopefully
1153          * such KVM will maintain initially selected protocol.
1154          */
1155         if (psmouse->resync_time && psmouse->poll(psmouse))
1156                 psmouse->resync_time = 0;
1157
1158         snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1159                  psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1160
1161         input_dev->name = psmouse->devname;
1162         input_dev->phys = psmouse->phys;
1163         input_dev->id.bustype = BUS_I8042;
1164         input_dev->id.vendor = 0x0002;
1165         input_dev->id.product = psmouse->type;
1166         input_dev->id.version = psmouse->model;
1167
1168         return 0;
1169 }
1170
1171 /*
1172  * psmouse_connect() is a callback from the serio module when
1173  * an unhandled serio port is found.
1174  */
1175 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1176 {
1177         struct psmouse *psmouse, *parent = NULL;
1178         struct input_dev *input_dev;
1179         int retval = 0, error = -ENOMEM;
1180
1181         mutex_lock(&psmouse_mutex);
1182
1183         /*
1184          * If this is a pass-through port deactivate parent so the device
1185          * connected to this port can be successfully identified
1186          */
1187         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1188                 parent = serio_get_drvdata(serio->parent);
1189                 psmouse_deactivate(parent);
1190         }
1191
1192         psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1193         input_dev = input_allocate_device();
1194         if (!psmouse || !input_dev)
1195                 goto err_free;
1196
1197         ps2_init(&psmouse->ps2dev, serio);
1198         INIT_WORK(&psmouse->resync_work, psmouse_resync);
1199         psmouse->dev = input_dev;
1200         snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1201
1202         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1203
1204         serio_set_drvdata(serio, psmouse);
1205
1206         error = serio_open(serio, drv);
1207         if (error)
1208                 goto err_clear_drvdata;
1209
1210         if (psmouse_probe(psmouse) < 0) {
1211                 error = -ENODEV;
1212                 goto err_close_serio;
1213         }
1214
1215         psmouse->rate = psmouse_rate;
1216         psmouse->resolution = psmouse_resolution;
1217         psmouse->resetafter = psmouse_resetafter;
1218         psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1219         psmouse->smartscroll = psmouse_smartscroll;
1220
1221         psmouse_switch_protocol(psmouse, NULL);
1222
1223         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1224         psmouse_initialize(psmouse);
1225
1226         error = input_register_device(psmouse->dev);
1227         if (error)
1228                 goto err_protocol_disconnect;
1229
1230         if (parent && parent->pt_activate)
1231                 parent->pt_activate(parent);
1232
1233         error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1234         if (error)
1235                 goto err_pt_deactivate;
1236
1237         psmouse_activate(psmouse);
1238
1239  out:
1240         /* If this is a pass-through port the parent needs to be re-activated */
1241         if (parent)
1242                 psmouse_activate(parent);
1243
1244         mutex_unlock(&psmouse_mutex);
1245         return retval;
1246
1247  err_pt_deactivate:
1248         if (parent && parent->pt_deactivate)
1249                 parent->pt_deactivate(parent);
1250         input_unregister_device(psmouse->dev);
1251         input_dev = NULL; /* so we don't try to free it below */
1252  err_protocol_disconnect:
1253         if (psmouse->disconnect)
1254                 psmouse->disconnect(psmouse);
1255         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1256  err_close_serio:
1257         serio_close(serio);
1258  err_clear_drvdata:
1259         serio_set_drvdata(serio, NULL);
1260  err_free:
1261         input_free_device(input_dev);
1262         kfree(psmouse);
1263
1264         retval = error;
1265         goto out;
1266 }
1267
1268
1269 static int psmouse_reconnect(struct serio *serio)
1270 {
1271         struct psmouse *psmouse = serio_get_drvdata(serio);
1272         struct psmouse *parent = NULL;
1273         struct serio_driver *drv = serio->drv;
1274         int rc = -1;
1275
1276         if (!drv || !psmouse) {
1277                 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1278                 return -1;
1279         }
1280
1281         mutex_lock(&psmouse_mutex);
1282
1283         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1284                 parent = serio_get_drvdata(serio->parent);
1285                 psmouse_deactivate(parent);
1286         }
1287
1288         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1289
1290         if (psmouse->reconnect) {
1291                 if (psmouse->reconnect(psmouse))
1292                         goto out;
1293         } else if (psmouse_probe(psmouse) < 0 ||
1294                    psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1295                 goto out;
1296
1297         /* ok, the device type (and capabilities) match the old one,
1298          * we can continue using it, complete intialization
1299          */
1300         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1301
1302         psmouse_initialize(psmouse);
1303
1304         if (parent && parent->pt_activate)
1305                 parent->pt_activate(parent);
1306
1307         psmouse_activate(psmouse);
1308         rc = 0;
1309
1310 out:
1311         /* If this is a pass-through port the parent waits to be activated */
1312         if (parent)
1313                 psmouse_activate(parent);
1314
1315         mutex_unlock(&psmouse_mutex);
1316         return rc;
1317 }
1318
1319 static struct serio_device_id psmouse_serio_ids[] = {
1320         {
1321                 .type   = SERIO_8042,
1322                 .proto  = SERIO_ANY,
1323                 .id     = SERIO_ANY,
1324                 .extra  = SERIO_ANY,
1325         },
1326         {
1327                 .type   = SERIO_PS_PSTHRU,
1328                 .proto  = SERIO_ANY,
1329                 .id     = SERIO_ANY,
1330                 .extra  = SERIO_ANY,
1331         },
1332         { 0 }
1333 };
1334
1335 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1336
1337 static struct serio_driver psmouse_drv = {
1338         .driver         = {
1339                 .name   = "psmouse",
1340         },
1341         .description    = DRIVER_DESC,
1342         .id_table       = psmouse_serio_ids,
1343         .interrupt      = psmouse_interrupt,
1344         .connect        = psmouse_connect,
1345         .reconnect      = psmouse_reconnect,
1346         .disconnect     = psmouse_disconnect,
1347         .cleanup        = psmouse_cleanup,
1348 };
1349
1350 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1351                                  char *buf)
1352 {
1353         struct serio *serio = to_serio_port(dev);
1354         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1355         struct psmouse *psmouse;
1356         int retval;
1357
1358         retval = serio_pin_driver(serio);
1359         if (retval)
1360                 return retval;
1361
1362         if (serio->drv != &psmouse_drv) {
1363                 retval = -ENODEV;
1364                 goto out;
1365         }
1366
1367         psmouse = serio_get_drvdata(serio);
1368
1369         retval = attr->show(psmouse, attr->data, buf);
1370
1371 out:
1372         serio_unpin_driver(serio);
1373         return retval;
1374 }
1375
1376 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1377                                 const char *buf, size_t count)
1378 {
1379         struct serio *serio = to_serio_port(dev);
1380         struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1381         struct psmouse *psmouse, *parent = NULL;
1382         int retval;
1383
1384         retval = serio_pin_driver(serio);
1385         if (retval)
1386                 return retval;
1387
1388         if (serio->drv != &psmouse_drv) {
1389                 retval = -ENODEV;
1390                 goto out_unpin;
1391         }
1392
1393         retval = mutex_lock_interruptible(&psmouse_mutex);
1394         if (retval)
1395                 goto out_unpin;
1396
1397         psmouse = serio_get_drvdata(serio);
1398
1399         if (psmouse->state == PSMOUSE_IGNORE) {
1400                 retval = -ENODEV;
1401                 goto out_unlock;
1402         }
1403
1404         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1405                 parent = serio_get_drvdata(serio->parent);
1406                 psmouse_deactivate(parent);
1407         }
1408
1409         psmouse_deactivate(psmouse);
1410
1411         retval = attr->set(psmouse, attr->data, buf, count);
1412
1413         if (retval != -ENODEV)
1414                 psmouse_activate(psmouse);
1415
1416         if (parent)
1417                 psmouse_activate(parent);
1418
1419  out_unlock:
1420         mutex_unlock(&psmouse_mutex);
1421  out_unpin:
1422         serio_unpin_driver(serio);
1423         return retval;
1424 }
1425
1426 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1427 {
1428         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1429
1430         return sprintf(buf, "%u\n", *field);
1431 }
1432
1433 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1434 {
1435         unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1436         unsigned long value;
1437         char *rest;
1438
1439         value = simple_strtoul(buf, &rest, 10);
1440         if (*rest)
1441                 return -EINVAL;
1442
1443         if ((unsigned int)value != value)
1444                 return -EINVAL;
1445
1446         *field = value;
1447
1448         return count;
1449 }
1450
1451 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1452 {
1453         return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1454 }
1455
1456 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1457 {
1458         struct serio *serio = psmouse->ps2dev.serio;
1459         struct psmouse *parent = NULL;
1460         struct input_dev *old_dev, *new_dev;
1461         const struct psmouse_protocol *proto, *old_proto;
1462         int error;
1463         int retry = 0;
1464
1465         proto = psmouse_protocol_by_name(buf, count);
1466         if (!proto)
1467                 return -EINVAL;
1468
1469         if (psmouse->type == proto->type)
1470                 return count;
1471
1472         new_dev = input_allocate_device();
1473         if (!new_dev)
1474                 return -ENOMEM;
1475
1476         while (serio->child) {
1477                 if (++retry > 3) {
1478                         printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1479                         input_free_device(new_dev);
1480                         return -EIO;
1481                 }
1482
1483                 mutex_unlock(&psmouse_mutex);
1484                 serio_unpin_driver(serio);
1485                 serio_unregister_child_port(serio);
1486                 serio_pin_driver_uninterruptible(serio);
1487                 mutex_lock(&psmouse_mutex);
1488
1489                 if (serio->drv != &psmouse_drv) {
1490                         input_free_device(new_dev);
1491                         return -ENODEV;
1492                 }
1493
1494                 if (psmouse->type == proto->type) {
1495                         input_free_device(new_dev);
1496                         return count; /* switched by other thread */
1497                 }
1498         }
1499
1500         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1501                 parent = serio_get_drvdata(serio->parent);
1502                 if (parent->pt_deactivate)
1503                         parent->pt_deactivate(parent);
1504         }
1505
1506         old_dev = psmouse->dev;
1507         old_proto = psmouse_protocol_by_type(psmouse->type);
1508
1509         if (psmouse->disconnect)
1510                 psmouse->disconnect(psmouse);
1511
1512         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1513
1514         psmouse->dev = new_dev;
1515         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1516
1517         if (psmouse_switch_protocol(psmouse, proto) < 0) {
1518                 psmouse_reset(psmouse);
1519                 /* default to PSMOUSE_PS2 */
1520                 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1521         }
1522
1523         psmouse_initialize(psmouse);
1524         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1525
1526         error = input_register_device(psmouse->dev);
1527         if (error) {
1528                 if (psmouse->disconnect)
1529                         psmouse->disconnect(psmouse);
1530
1531                 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1532                 input_free_device(new_dev);
1533                 psmouse->dev = old_dev;
1534                 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1535                 psmouse_switch_protocol(psmouse, old_proto);
1536                 psmouse_initialize(psmouse);
1537                 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1538
1539                 return error;
1540         }
1541
1542         input_unregister_device(old_dev);
1543
1544         if (parent && parent->pt_activate)
1545                 parent->pt_activate(parent);
1546
1547         return count;
1548 }
1549
1550 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1551 {
1552         unsigned long value;
1553         char *rest;
1554
1555         value = simple_strtoul(buf, &rest, 10);
1556         if (*rest)
1557                 return -EINVAL;
1558
1559         psmouse->set_rate(psmouse, value);
1560         return count;
1561 }
1562
1563 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1564 {
1565         unsigned long value;
1566         char *rest;
1567
1568         value = simple_strtoul(buf, &rest, 10);
1569         if (*rest)
1570                 return -EINVAL;
1571
1572         psmouse->set_resolution(psmouse, value);
1573         return count;
1574 }
1575
1576
1577 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1578 {
1579         const struct psmouse_protocol *proto;
1580
1581         if (!val)
1582                 return -EINVAL;
1583
1584         proto = psmouse_protocol_by_name(val, strlen(val));
1585
1586         if (!proto || !proto->maxproto)
1587                 return -EINVAL;
1588
1589         *((unsigned int *)kp->arg) = proto->type;
1590
1591         return 0;
1592 }
1593
1594 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1595 {
1596         int type = *((unsigned int *)kp->arg);
1597
1598         return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1599 }
1600
1601 static int __init psmouse_init(void)
1602 {
1603         int err;
1604
1605         kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1606         if (!kpsmoused_wq) {
1607                 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1608                 return -ENOMEM;
1609         }
1610
1611         err = serio_register_driver(&psmouse_drv);
1612         if (err)
1613                 destroy_workqueue(kpsmoused_wq);
1614
1615         return err;
1616 }
1617
1618 static void __exit psmouse_exit(void)
1619 {
1620         serio_unregister_driver(&psmouse_drv);
1621         destroy_workqueue(kpsmoused_wq);
1622 }
1623
1624 module_init(psmouse_init);
1625 module_exit(psmouse_exit);