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 "psmouse.h"
  24 #include "synaptics.h"
  25 #include "logips2pp.h"
  26 #include "alps.h"
  27
  28 #define DRIVER_DESC     "PS/2 mouse driver"
  29
  30 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
  31 MODULE_DESCRIPTION(DRIVER_DESC);
  32 MODULE_LICENSE("GPL");
  33
  34 static unsigned int psmouse_max_proto = -1U;
  35 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
  36 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
  37 static char *psmouse_proto_abbrev[] = { NULL, "bare", NULL, NULL, NULL, "imps", "exps", NULL, NULL, NULL };
  38 #define param_check_proto_abbrev(name, p)       __param_check(name, p, unsigned int)
  39 #define param_set_proto_abbrev                  psmouse_set_maxproto
  40 #define param_get_proto_abbrev                  psmouse_get_maxproto
  41 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
  42 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
  43
  44 static unsigned int psmouse_resolution = 200;
  45 module_param_named(resolution, psmouse_resolution, uint, 0644);
  46 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
  47
  48 static unsigned int psmouse_rate = 100;
  49 module_param_named(rate, psmouse_rate, uint, 0644);
  50 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
  51
  52 static unsigned int psmouse_smartscroll = 1;
  53 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
  54 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
  55
  56 static unsigned int psmouse_resetafter;
  57 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
  58 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
  59
  60 PSMOUSE_DEFINE_ATTR(rate);
  61 PSMOUSE_DEFINE_ATTR(resolution);
  62 PSMOUSE_DEFINE_ATTR(resetafter);
  63
  64 __obsolete_setup("psmouse_noext");
  65 __obsolete_setup("psmouse_resolution=");
  66 __obsolete_setup("psmouse_smartscroll=");
  67 __obsolete_setup("psmouse_resetafter=");
  68 __obsolete_setup("psmouse_rate=");
  69
  70 static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "ThinkPS/2", "GenPS/2", "ImPS/2", "ImExPS/2", "SynPS/2", "AlpsPS/2" };
  71
  72 /*
  73  * psmouse_process_byte() analyzes the PS/2 data stream and reports
  74  * relevant events to the input module once full packet has arrived.
  75  */
  76
  77 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
  78 {
  79         struct input_dev *dev = &psmouse->dev;
  80         unsigned char *packet = psmouse->packet;
  81
  82         if (psmouse->pktcnt < psmouse->pktsize)
  83                 return PSMOUSE_GOOD_DATA;
  84
  85 /*
  86  * Full packet accumulated, process it
  87  */
  88
  89         input_regs(dev, regs);
  90
  91 /*
  92  * Scroll wheel on IntelliMice, scroll buttons on NetMice
  93  */
  94
  95         if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
  96                 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
  97
  98 /*
  99  * Scroll wheel and buttons on IntelliMouse Explorer
 100  */
 101
 102         if (psmouse->type == PSMOUSE_IMEX) {
 103                 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
 104                 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
 105                 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
 106         }
 107
 108 /*
 109  * Extra buttons on Genius NewNet 3D
 110  */
 111
 112         if (psmouse->type == PSMOUSE_GENPS) {
 113                 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
 114                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
 115         }
 116
 117 /*
 118  * Extra button on ThinkingMouse
 119  */
 120         if (psmouse->type == PSMOUSE_THINKPS) {
 121                 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
 122                 /* Without this bit of weirdness moving up gives wildly high Y changes. */
 123                 packet[1] |= (packet[0] & 0x40) << 1;
 124         }
 125
 126 /*
 127  * Generic PS/2 Mouse
 128  */
 129
 130         input_report_key(dev, BTN_LEFT,    packet[0]       & 1);
 131         input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 132         input_report_key(dev, BTN_RIGHT,  (packet[0] >> 1) & 1);
 133
 134         input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
 135         input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
 136
 137         input_sync(dev);
 138
 139         return PSMOUSE_FULL_PACKET;
 140 }
 141
 142 /*
 143  * psmouse_interrupt() handles incoming characters, either gathering them into
 144  * packets or passing them to the command routine as command output.
 145  */
 146
 147 static irqreturn_t psmouse_interrupt(struct serio *serio,
 148                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 149 {
 150         struct psmouse *psmouse = serio_get_drvdata(serio);
 151         psmouse_ret_t rc;
 152
 153         if (psmouse->state == PSMOUSE_IGNORE)
 154                 goto out;
 155
 156         if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
 157                 if (psmouse->state == PSMOUSE_ACTIVATED)
 158                         printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
 159                                 flags & SERIO_TIMEOUT ? " timeout" : "",
 160                                 flags & SERIO_PARITY ? " bad parity" : "");
 161                 ps2_cmd_aborted(&psmouse->ps2dev);
 162                 goto out;
 163         }
 164
 165         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
 166                 if  (ps2_handle_ack(&psmouse->ps2dev, data))
 167                         goto out;
 168
 169         if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
 170                 if  (ps2_handle_response(&psmouse->ps2dev, data))
 171                         goto out;
 172
 173         if (psmouse->state == PSMOUSE_INITIALIZING)
 174                 goto out;
 175
 176         if (psmouse->state == PSMOUSE_ACTIVATED &&
 177             psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
 178                 printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
 179                        psmouse->name, psmouse->phys, psmouse->pktcnt);
 180                 psmouse->pktcnt = 0;
 181         }
 182
 183         psmouse->last = jiffies;
 184         psmouse->packet[psmouse->pktcnt++] = data;
 185
 186         if (psmouse->packet[0] == PSMOUSE_RET_BAT) {
 187                 if (psmouse->pktcnt == 1)
 188                         goto out;
 189
 190                 if (psmouse->pktcnt == 2) {
 191                         if (psmouse->packet[1] == PSMOUSE_RET_ID) {
 192                                 psmouse->state = PSMOUSE_IGNORE;
 193                                 serio_reconnect(serio);
 194                                 goto out;
 195                         }
 196                         if (psmouse->type == PSMOUSE_SYNAPTICS) {
 197                                 /* neither 0xAA nor 0x00 are valid first bytes
 198                                  * for a packet in absolute mode
 199                                  */
 200                                 psmouse->pktcnt = 0;
 201                                 goto out;
 202                         }
 203                 }
 204         }
 205
 206         rc = psmouse->protocol_handler(psmouse, regs);
 207
 208         switch (rc) {
 209                 case PSMOUSE_BAD_DATA:
 210                         printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
 211                                 psmouse->name, psmouse->phys, psmouse->pktcnt);
 212                         psmouse->pktcnt = 0;
 213
 214                         if (++psmouse->out_of_sync == psmouse->resetafter) {
 215                                 psmouse->state = PSMOUSE_IGNORE;
 216                                 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
 217                                 serio_reconnect(psmouse->ps2dev.serio);
 218                         }
 219                         break;
 220
 221                 case PSMOUSE_FULL_PACKET:
 222                         psmouse->pktcnt = 0;
 223                         if (psmouse->out_of_sync) {
 224                                 psmouse->out_of_sync = 0;
 225                                 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
 226                                         psmouse->name, psmouse->phys);
 227                         }
 228                         break;
 229
 230                 case PSMOUSE_GOOD_DATA:
 231                         break;
 232         }
 233 out:
 234         return IRQ_HANDLED;
 235 }
 236
 237
 238 /*
 239  * psmouse_sliced_command() sends an extended PS/2 command to the mouse
 240  * using sliced syntax, understood by advanced devices, such as Logitech
 241  * or Synaptics touchpads. The command is encoded as:
 242  * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
 243  * is the command.
 244  */
 245 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
 246 {
 247         int i;
 248
 249         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
 250                 return -1;
 251
 252         for (i = 6; i >= 0; i -= 2) {
 253                 unsigned char d = (command >> i) & 3;
 254                 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
 255                         return -1;
 256         }
 257
 258         return 0;
 259 }
 260
 261
 262 /*
 263  * psmouse_reset() resets the mouse into power-on state.
 264  */
 265 int psmouse_reset(struct psmouse *psmouse)
 266 {
 267         unsigned char param[2];
 268
 269         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
 270                 return -1;
 271
 272         if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
 273                 return -1;
 274
 275         return 0;
 276 }
 277
 278
 279 /*
 280  * Genius NetMouse magic init.
 281  */
 282 static int genius_detect(struct psmouse *psmouse, int set_properties)
 283 {
 284         struct ps2dev *ps2dev = &psmouse->ps2dev;
 285         unsigned char param[4];
 286
 287         param[0] = 3;
 288         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 289         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 290         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 291         ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11);
 292         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 293
 294         if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
 295                 return -1;
 296
 297         if (set_properties) {
 298                 set_bit(BTN_EXTRA, psmouse->dev.keybit);
 299                 set_bit(BTN_SIDE, psmouse->dev.keybit);
 300                 set_bit(REL_WHEEL, psmouse->dev.relbit);
 301
 302                 psmouse->vendor = "Genius";
 303                 psmouse->name = "Wheel Mouse";
 304                 psmouse->pktsize = 4;
 305         }
 306
 307         return 0;
 308 }
 309
 310 /*
 311  * IntelliMouse magic init.
 312  */
 313 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
 314 {
 315         struct ps2dev *ps2dev = &psmouse->ps2dev;
 316         unsigned char param[2];
 317
 318         param[0] = 200;
 319         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 320         param[0] = 100;
 321         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 322         param[0] =  80;
 323         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 324         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 325
 326         if (param[0] != 3)
 327                 return -1;
 328
 329         if (set_properties) {
 330                 set_bit(REL_WHEEL, psmouse->dev.relbit);
 331
 332                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 333                 if (!psmouse->name) psmouse->name = "Wheel Mouse";
 334                 psmouse->pktsize = 4;
 335         }
 336
 337         return 0;
 338 }
 339
 340 /*
 341  * Try IntelliMouse/Explorer magic init.
 342  */
 343 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
 344 {
 345         struct ps2dev *ps2dev = &psmouse->ps2dev;
 346         unsigned char param[2];
 347
 348         intellimouse_detect(psmouse, 0);
 349
 350         param[0] = 200;
 351         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 352         param[0] = 200;
 353         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 354         param[0] =  80;
 355         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 356         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 357
 358         if (param[0] != 4)
 359                 return -1;
 360
 361         if (set_properties) {
 362                 set_bit(REL_WHEEL, psmouse->dev.relbit);
 363                 set_bit(BTN_SIDE, psmouse->dev.keybit);
 364                 set_bit(BTN_EXTRA, psmouse->dev.keybit);
 365
 366                 if (!psmouse->vendor) psmouse->vendor = "Generic";
 367                 if (!psmouse->name) psmouse->name = "Explorer Mouse";
 368                 psmouse->pktsize = 4;
 369         }
 370
 371         return 0;
 372 }
 373
 374 /*
 375  * Kensington ThinkingMouse / ExpertMouse magic init.
 376  */
 377 static int thinking_detect(struct psmouse *psmouse, int set_properties)
 378 {
 379         struct ps2dev *ps2dev = &psmouse->ps2dev;
 380         unsigned char param[2];
 381         unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
 382         int i;
 383
 384         param[0] = 10;
 385         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 386         param[0] = 0;
 387         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 388         for (i = 0; seq[i]; i++)
 389                 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
 390         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 391
 392         if (param[0] != 2)
 393                 return -1;
 394
 395         if (set_properties) {
 396                 set_bit(BTN_EXTRA, psmouse->dev.keybit);
 397
 398                 psmouse->vendor = "Kensington";
 399                 psmouse->name = "ThinkingMouse";
 400         }
 401
 402         return 0;
 403 }
 404
 405 /*
 406  * Bare PS/2 protocol "detection". Always succeeds.
 407  */
 408 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
 409 {
 410         if (!psmouse->vendor) psmouse->vendor = "Generic";
 411         if (!psmouse->name) psmouse->name = "Mouse";
 412
 413         return 0;
 414 }
 415
 416 /*
 417  * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
 418  * the mouse may have.
 419  */
 420
 421 static int psmouse_extensions(struct psmouse *psmouse,
 422                               unsigned int max_proto, int set_properties)
 423 {
 424         int synaptics_hardware = 0;
 425
 426 /*
 427  * Try Kensington ThinkingMouse (we try first, because synaptics probe
 428  * upsets the thinkingmouse).
 429  */
 430
 431         if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
 432                 return PSMOUSE_THINKPS;
 433
 434 /*
 435  * Try Synaptics TouchPad
 436  */
 437         if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
 438                 synaptics_hardware = 1;
 439
 440                 if (max_proto > PSMOUSE_IMEX) {
 441                         if (!set_properties || synaptics_init(psmouse) == 0)
 442                                 return PSMOUSE_SYNAPTICS;
 443 /*
 444  * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
 445  * Unfortunately Logitech/Genius probes confuse some firmware versions so
 446  * we'll have to skip them.
 447  */
 448                         max_proto = PSMOUSE_IMEX;
 449                 }
 450 /*
 451  * Make sure that touchpad is in relative mode, gestures (taps) are enabled
 452  */
 453                 synaptics_reset(psmouse);
 454         }
 455
 456 /*
 457  * Try ALPS TouchPad
 458  */
 459         if (max_proto > PSMOUSE_IMEX) {
 460                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 461                 if (alps_detect(psmouse, set_properties) == 0) {
 462                         if (!set_properties || alps_init(psmouse) == 0)
 463                                 return PSMOUSE_ALPS;
 464 /*
 465  * Init failed, try basic relative protocols
 466  */
 467                         max_proto = PSMOUSE_IMEX;
 468                 }
 469         }
 470
 471         if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
 472                 return PSMOUSE_GENPS;
 473
 474         if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
 475                 return PSMOUSE_PS2PP;
 476
 477 /*
 478  * Reset to defaults in case the device got confused by extended
 479  * protocol probes.
 480  */
 481         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 482
 483         if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
 484                 return PSMOUSE_IMEX;
 485
 486         if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
 487                 return PSMOUSE_IMPS;
 488
 489 /*
 490  * Okay, all failed, we have a standard mouse here. The number of the buttons
 491  * is still a question, though. We assume 3.
 492  */
 493         ps2bare_detect(psmouse, set_properties);
 494
 495         if (synaptics_hardware) {
 496 /*
 497  * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
 498  * We need to reset the touchpad because if there is a track point on the
 499  * pass through port it could get disabled while probing for protocol
 500  * extensions.
 501  */
 502                 psmouse_reset(psmouse);
 503                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
 504         }
 505
 506         return PSMOUSE_PS2;
 507 }
 508
 509 /*
 510  * psmouse_probe() probes for a PS/2 mouse.
 511  */
 512
 513 static int psmouse_probe(struct psmouse *psmouse)
 514 {
 515         struct ps2dev *ps2dev = &psmouse->ps2dev;
 516         unsigned char param[2];
 517
 518 /*
 519  * First, we check if it's a mouse. It should send 0x00 or 0x03
 520  * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
 521  */
 522
 523         param[0] = 0xa5;
 524         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
 525                 return -1;
 526
 527         if (param[0] != 0x00 && param[0] != 0x03 && param[0] != 0x04)
 528                 return -1;
 529
 530 /*
 531  * Then we reset and disable the mouse so that it doesn't generate events.
 532  */
 533
 534         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
 535                 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
 536
 537         return 0;
 538 }
 539
 540 /*
 541  * Here we set the mouse resolution.
 542  */
 543
 544 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
 545 {
 546         unsigned char params[] = { 0, 1, 2, 2, 3 };
 547
 548         if (resolution == 0 || resolution > 200)
 549                 resolution = 200;
 550
 551         ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
 552         psmouse->resolution = 25 << params[resolution / 50];
 553 }
 554
 555 /*
 556  * Here we set the mouse report rate.
 557  */
 558
 559 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
 560 {
 561         unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
 562         int i = 0;
 563
 564         while (rates[i] > rate) i++;
 565         ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
 566         psmouse->rate = rates[i];
 567 }
 568
 569 /*
 570  * psmouse_initialize() initializes the mouse to a sane state.
 571  */
 572
 573 static void psmouse_initialize(struct psmouse *psmouse)
 574 {
 575 /*
 576  * We set the mouse into streaming mode.
 577  */
 578
 579         ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
 580
 581 /*
 582  * We set the mouse report rate, resolution and scaling.
 583  */
 584
 585         if (psmouse_max_proto != PSMOUSE_PS2) {
 586                 psmouse->set_rate(psmouse, psmouse->rate);
 587                 psmouse->set_resolution(psmouse, psmouse->resolution);
 588                 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
 589         }
 590 }
 591
 592 /*
 593  * psmouse_set_state() sets new psmouse state and resets all flags and
 594  * counters while holding serio lock so fighting with interrupt handler
 595  * is not a concern.
 596  */
 597
 598 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
 599 {
 600         serio_pause_rx(psmouse->ps2dev.serio);
 601         psmouse->state = new_state;
 602         psmouse->pktcnt = psmouse->out_of_sync = 0;
 603         psmouse->ps2dev.flags = 0;
 604         serio_continue_rx(psmouse->ps2dev.serio);
 605 }
 606
 607 /*
 608  * psmouse_activate() enables the mouse so that we get motion reports from it.
 609  */
 610
 611 static void psmouse_activate(struct psmouse *psmouse)
 612 {
 613         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 614                 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
 615                         psmouse->ps2dev.serio->phys);
 616
 617         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 618 }
 619
 620
 621 /*
 622  * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
 623  * reports from it unless we explicitely request it.
 624  */
 625
 626 static void psmouse_deactivate(struct psmouse *psmouse)
 627 {
 628         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 629                 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
 630                         psmouse->ps2dev.serio->phys);
 631
 632         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 633 }
 634
 635
 636 /*
 637  * psmouse_cleanup() resets the mouse into power-on state.
 638  */
 639
 640 static void psmouse_cleanup(struct serio *serio)
 641 {
 642         struct psmouse *psmouse = serio_get_drvdata(serio);
 643
 644         psmouse_reset(psmouse);
 645 }
 646
 647 /*
 648  * psmouse_disconnect() closes and frees.
 649  */
 650
 651 static void psmouse_disconnect(struct serio *serio)
 652 {
 653         struct psmouse *psmouse, *parent;
 654
 655         device_remove_file(&serio->dev, &psmouse_attr_rate);
 656         device_remove_file(&serio->dev, &psmouse_attr_resolution);
 657         device_remove_file(&serio->dev, &psmouse_attr_resetafter);
 658
 659         psmouse = serio_get_drvdata(serio);
 660         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 661
 662         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 663                 parent = serio_get_drvdata(serio->parent);
 664                 if (parent->pt_deactivate)
 665                         parent->pt_deactivate(parent);
 666         }
 667
 668         if (psmouse->disconnect)
 669                 psmouse->disconnect(psmouse);
 670
 671         psmouse_set_state(psmouse, PSMOUSE_IGNORE);
 672
 673         input_unregister_device(&psmouse->dev);
 674         serio_close(serio);
 675         serio_set_drvdata(serio, NULL);
 676         kfree(psmouse);
 677 }
 678
 679 /*
 680  * psmouse_connect() is a callback from the serio module when
 681  * an unhandled serio port is found.
 682  */
 683 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
 684 {
 685         struct psmouse *psmouse, *parent = NULL;
 686         int retval;
 687
 688         /*
 689          * If this is a pass-through port deactivate parent so the device
 690          * connected to this port can be successfully identified
 691          */
 692         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 693                 parent = serio_get_drvdata(serio->parent);
 694                 psmouse_deactivate(parent);
 695         }
 696
 697         if (!(psmouse = kmalloc(sizeof(struct psmouse), GFP_KERNEL))) {
 698                 retval = -ENOMEM;
 699                 goto out;
 700         }
 701
 702         memset(psmouse, 0, sizeof(struct psmouse));
 703
 704         ps2_init(&psmouse->ps2dev, serio);
 705         sprintf(psmouse->phys, "%s/input0", serio->phys);
 706         psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 707         psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 708         psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
 709         psmouse->dev.private = psmouse;
 710         psmouse->dev.dev = &serio->dev;
 711         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
 712
 713         serio_set_drvdata(serio, psmouse);
 714
 715         retval = serio_open(serio, drv);
 716         if (retval) {
 717                 serio_set_drvdata(serio, NULL);
 718                 kfree(psmouse);
 719                 goto out;
 720         }
 721
 722         if (psmouse_probe(psmouse) < 0) {
 723                 serio_close(serio);
 724                 serio_set_drvdata(serio, NULL);
 725                 kfree(psmouse);
 726                 retval = -ENODEV;
 727                 goto out;
 728         }
 729
 730         psmouse->rate = psmouse_rate;
 731         psmouse->resolution = psmouse_resolution;
 732         psmouse->resetafter = psmouse_resetafter;
 733         psmouse->smartscroll = psmouse_smartscroll;
 734         psmouse->set_rate = psmouse_set_rate;
 735         psmouse->set_resolution = psmouse_set_resolution;
 736         psmouse->protocol_handler = psmouse_process_byte;
 737         psmouse->pktsize = 3;
 738
 739         psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
 740
 741         sprintf(psmouse->devname, "%s %s %s",
 742                 psmouse_protocols[psmouse->type], psmouse->vendor, psmouse->name);
 743
 744         psmouse->dev.name = psmouse->devname;
 745         psmouse->dev.phys = psmouse->phys;
 746         psmouse->dev.id.bustype = BUS_I8042;
 747         psmouse->dev.id.vendor = 0x0002;
 748         psmouse->dev.id.product = psmouse->type;
 749         psmouse->dev.id.version = psmouse->model;
 750
 751         input_register_device(&psmouse->dev);
 752
 753         printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);
 754
 755         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 756
 757         psmouse_initialize(psmouse);
 758
 759         if (parent && parent->pt_activate)
 760                 parent->pt_activate(parent);
 761
 762         device_create_file(&serio->dev, &psmouse_attr_rate);
 763         device_create_file(&serio->dev, &psmouse_attr_resolution);
 764         device_create_file(&serio->dev, &psmouse_attr_resetafter);
 765
 766         psmouse_activate(psmouse);
 767
 768         retval = 0;
 769
 770 out:
 771         /* If this is a pass-through port the parent awaits to be activated */
 772         if (parent)
 773                 psmouse_activate(parent);
 774
 775         return retval;
 776 }
 777
 778
 779 static int psmouse_reconnect(struct serio *serio)
 780 {
 781         struct psmouse *psmouse = serio_get_drvdata(serio);
 782         struct psmouse *parent = NULL;
 783         struct serio_driver *drv = serio->drv;
 784         int rc = -1;
 785
 786         if (!drv || !psmouse) {
 787                 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
 788                 return -1;
 789         }
 790
 791         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 792                 parent = serio_get_drvdata(serio->parent);
 793                 psmouse_deactivate(parent);
 794         }
 795
 796         psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
 797
 798         if (psmouse->reconnect) {
 799                 if (psmouse->reconnect(psmouse))
 800                         goto out;
 801         } else if (psmouse_probe(psmouse) < 0 ||
 802                    psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
 803                 goto out;
 804
 805         /* ok, the device type (and capabilities) match the old one,
 806          * we can continue using it, complete intialization
 807          */
 808         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 809
 810         psmouse_initialize(psmouse);
 811
 812         if (parent && parent->pt_activate)
 813                 parent->pt_activate(parent);
 814
 815         psmouse_activate(psmouse);
 816         rc = 0;
 817
 818 out:
 819         /* If this is a pass-through port the parent waits to be activated */
 820         if (parent)
 821                 psmouse_activate(parent);
 822
 823         return rc;
 824 }
 825
 826 static struct serio_device_id psmouse_serio_ids[] = {
 827         {
 828                 .type   = SERIO_8042,
 829                 .proto  = SERIO_ANY,
 830                 .id     = SERIO_ANY,
 831                 .extra  = SERIO_ANY,
 832         },
 833         {
 834                 .type   = SERIO_PS_PSTHRU,
 835                 .proto  = SERIO_ANY,
 836                 .id     = SERIO_ANY,
 837                 .extra  = SERIO_ANY,
 838         },
 839         { 0 }
 840 };
 841
 842 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
 843
 844 static struct serio_driver psmouse_drv = {
 845         .driver         = {
 846                 .name   = "psmouse",
 847         },
 848         .description    = DRIVER_DESC,
 849         .id_table       = psmouse_serio_ids,
 850         .interrupt      = psmouse_interrupt,
 851         .connect        = psmouse_connect,
 852         .reconnect      = psmouse_reconnect,
 853         .disconnect     = psmouse_disconnect,
 854         .cleanup        = psmouse_cleanup,
 855 };
 856
 857 ssize_t psmouse_attr_show_helper(struct device *dev, char *buf,
 858                                  ssize_t (*handler)(struct psmouse *, char *))
 859 {
 860         struct serio *serio = to_serio_port(dev);
 861         int retval;
 862
 863         retval = serio_pin_driver(serio);
 864         if (retval)
 865                 return retval;
 866
 867         if (serio->drv != &psmouse_drv) {
 868                 retval = -ENODEV;
 869                 goto out;
 870         }
 871
 872         retval = handler(serio_get_drvdata(serio), buf);
 873
 874 out:
 875         serio_unpin_driver(serio);
 876         return retval;
 877 }
 878
 879 ssize_t psmouse_attr_set_helper(struct device *dev, const char *buf, size_t count,
 880                                 ssize_t (*handler)(struct psmouse *, const char *, size_t))
 881 {
 882         struct serio *serio = to_serio_port(dev);
 883         struct psmouse *psmouse = serio_get_drvdata(serio);
 884         struct psmouse *parent = NULL;
 885         int retval;
 886
 887         retval = serio_pin_driver(serio);
 888         if (retval)
 889                 return retval;
 890
 891         if (serio->drv != &psmouse_drv) {
 892                 retval = -ENODEV;
 893                 goto out;
 894         }
 895
 896         if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
 897                 parent = serio_get_drvdata(serio->parent);
 898                 psmouse_deactivate(parent);
 899         }
 900         psmouse_deactivate(psmouse);
 901
 902         retval = handler(psmouse, buf, count);
 903
 904         psmouse_activate(psmouse);
 905         if (parent)
 906                 psmouse_activate(parent);
 907
 908 out:
 909         serio_unpin_driver(serio);
 910         return retval;
 911 }
 912
 913 static ssize_t psmouse_attr_show_rate(struct psmouse *psmouse, char *buf)
 914 {
 915         return sprintf(buf, "%d\n", psmouse->rate);
 916 }
 917
 918 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, const char *buf, size_t count)
 919 {
 920         unsigned long value;
 921         char *rest;
 922
 923         value = simple_strtoul(buf, &rest, 10);
 924         if (*rest)
 925                 return -EINVAL;
 926
 927         psmouse->set_rate(psmouse, value);
 928         return count;
 929 }
 930
 931 static ssize_t psmouse_attr_show_resolution(struct psmouse *psmouse, char *buf)
 932 {
 933         return sprintf(buf, "%d\n", psmouse->resolution);
 934 }
 935
 936 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, const char *buf, size_t count)
 937 {
 938         unsigned long value;
 939         char *rest;
 940
 941         value = simple_strtoul(buf, &rest, 10);
 942         if (*rest)
 943                 return -EINVAL;
 944
 945         psmouse->set_resolution(psmouse, value);
 946         return count;
 947 }
 948
 949 static ssize_t psmouse_attr_show_resetafter(struct psmouse *psmouse, char *buf)
 950 {
 951         return sprintf(buf, "%d\n", psmouse->resetafter);
 952 }
 953
 954 static ssize_t psmouse_attr_set_resetafter(struct psmouse *psmouse, const char *buf, size_t count)
 955 {
 956         unsigned long value;
 957         char *rest;
 958
 959         value = simple_strtoul(buf, &rest, 10);
 960         if (*rest)
 961                 return -EINVAL;
 962
 963         psmouse->resetafter = value;
 964         return count;
 965 }
 966
 967 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
 968 {
 969         int i;
 970
 971         if (!val)
 972                 return -EINVAL;
 973
 974         if (!strncmp(val, "any", 3)) {
 975                 *((unsigned int *)kp->arg) = -1UL;
 976                 return 0;
 977         }
 978
 979         for (i = 0; i < ARRAY_SIZE(psmouse_proto_abbrev); i++) {
 980                 if (!psmouse_proto_abbrev[i])
 981                         continue;
 982
 983                 if (!strncmp(val, psmouse_proto_abbrev[i], strlen(psmouse_proto_abbrev[i]))) {
 984                         *((unsigned int *)kp->arg) = i;
 985                         return 0;
 986                 }
 987         }
 988
 989         return -EINVAL;                                 \
 990 }
 991
 992 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
 993 {
 994         return sprintf(buffer, "%s\n",
 995                         psmouse_max_proto < ARRAY_SIZE(psmouse_proto_abbrev) ?
 996                                 psmouse_proto_abbrev[psmouse_max_proto] : "any");
 997 }
 998
 999 static int __init psmouse_init(void)
1000 {
1001         serio_register_driver(&psmouse_drv);
1002         return 0;
1003 }
1004
1005 static void __exit psmouse_exit(void)
1006 {
1007         serio_unregister_driver(&psmouse_drv);
1008 }
1009
1010 module_init(psmouse_init);
1011 module_exit(psmouse_exit);