drivers/input/mouse/alps.c

   1 /*
   2  * ALPS touchpad PS/2 mouse driver
   3  *
   4  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
   5  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
   6  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
   7  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
   8  *
   9  * ALPS detection, tap switching and status querying info is taken from
  10  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License version 2 as published by
  14  * the Free Software Foundation.
  15  */
  16
  17 #include <linux/input.h>
  18 #include <linux/serio.h>
  19 #include <linux/libps2.h>
  20
  21 #include "psmouse.h"
  22 #include "alps.h"
  23
  24 #undef DEBUG
  25 #ifdef DEBUG
  26 #define dbg(format, arg...) printk(KERN_INFO "alps.c: " format "\n", ## arg)
  27 #else
  28 #define dbg(format, arg...) do {} while (0)
  29 #endif
  30
  31 #define ALPS_DUALPOINT  0x01
  32 #define ALPS_WHEEL      0x02
  33 #define ALPS_FW_BK_1    0x04
  34 #define ALPS_4BTN       0x08
  35 #define ALPS_OLDPROTO   0x10
  36 #define ALPS_PASS       0x20
  37 #define ALPS_FW_BK_2    0x40
  38
  39 static const struct alps_model_info alps_model_data[] = {
  40         { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO },            /* UMAX-530T */
  41         { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  42         { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  43         { { 0x60, 0x03, 0xc8 }, 0xf8, 0xf8, 0 },                        /* HP ze1115 */
  44         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  45         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  46         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, ALPS_FW_BK_2 },             /* Fujitsu Siemens S6010 */
  47         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },               /* Toshiba Satellite S2400-103 */
  48         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 },             /* NEC Versa L320 */
  49         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  50         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS },                /* Dell Latitude D800 */
  51         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  52         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 },             /* Ahtec Laptop */
  53         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  54         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  55         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  56 };
  57
  58 /*
  59  * XXX - this entry is suspicious. First byte has zero lower nibble,
  60  * which is what a normal mouse would report. Also, the value 0x0e
  61  * isn't valid per PS/2 spec.
  62  */
  63
  64 /*
  65  * ALPS abolute Mode - new format
  66  *
  67  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  68  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  69  * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
  70  * byte 3:  0   y9   y8   y7    1    M    R    L
  71  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  72  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  73  *
  74  * ?'s can have different meanings on different models,
  75  * such as wheel rotation, extra buttons, stick buttons
  76  * on a dualpoint, etc.
  77  */
  78
  79 static void alps_process_packet(struct psmouse *psmouse)
  80 {
  81         struct alps_data *priv = psmouse->private;
  82         unsigned char *packet = psmouse->packet;
  83         struct input_dev *dev = psmouse->dev;
  84         struct input_dev *dev2 = priv->dev2;
  85         int x, y, z, ges, fin, left, right, middle;
  86         int back = 0, forward = 0;
  87
  88         if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
  89                 input_report_key(dev2, BTN_LEFT,   packet[0] & 1);
  90                 input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
  91                 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
  92                 input_report_rel(dev2, REL_X,
  93                         packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
  94                 input_report_rel(dev2, REL_Y,
  95                         packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
  96                 input_sync(dev2);
  97                 return;
  98         }
  99
 100         if (priv->i->flags & ALPS_OLDPROTO) {
 101                 left = packet[2] & 0x10;
 102                 right = packet[2] & 0x08;
 103                 middle = 0;
 104                 x = packet[1] | ((packet[0] & 0x07) << 7);
 105                 y = packet[4] | ((packet[3] & 0x07) << 7);
 106                 z = packet[5];
 107         } else {
 108                 left = packet[3] & 1;
 109                 right = packet[3] & 2;
 110                 middle = packet[3] & 4;
 111                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 112                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 113                 z = packet[5];
 114         }
 115
 116         if (priv->i->flags & ALPS_FW_BK_1) {
 117                 back = packet[2] & 4;
 118                 forward = packet[0] & 0x10;
 119         }
 120
 121         if (priv->i->flags & ALPS_FW_BK_2) {
 122                 back = packet[3] & 4;
 123                 forward = packet[2] & 4;
 124                 if ((middle = forward && back))
 125                         forward = back = 0;
 126         }
 127
 128         ges = packet[2] & 1;
 129         fin = packet[2] & 2;
 130
 131         input_report_key(dev, BTN_LEFT, left);
 132         input_report_key(dev, BTN_RIGHT, right);
 133         input_report_key(dev, BTN_MIDDLE, middle);
 134
 135         if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
 136                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 137                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 138                 input_sync(dev);
 139                 input_sync(dev2);
 140                 return;
 141         }
 142
 143         /* Convert hardware tap to a reasonable Z value */
 144         if (ges && !fin) z = 40;
 145
 146         /*
 147          * A "tap and drag" operation is reported by the hardware as a transition
 148          * from (!fin && ges) to (fin && ges). This should be translated to the
 149          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 150          */
 151         if (ges && fin && !priv->prev_fin) {
 152                 input_report_abs(dev, ABS_X, x);
 153                 input_report_abs(dev, ABS_Y, y);
 154                 input_report_abs(dev, ABS_PRESSURE, 0);
 155                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 156                 input_sync(dev);
 157         }
 158         priv->prev_fin = fin;
 159
 160         if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 161         if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
 162
 163         if (z > 0) {
 164                 input_report_abs(dev, ABS_X, x);
 165                 input_report_abs(dev, ABS_Y, y);
 166         }
 167
 168         input_report_abs(dev, ABS_PRESSURE, z);
 169         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 170
 171         if (priv->i->flags & ALPS_WHEEL)
 172                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
 173
 174         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 175                 input_report_key(dev, BTN_FORWARD, forward);
 176                 input_report_key(dev, BTN_BACK, back);
 177         }
 178
 179         input_sync(dev);
 180 }
 181
 182 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 183 {
 184         struct alps_data *priv = psmouse->private;
 185
 186         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 187                 if (psmouse->pktcnt == 3) {
 188                         alps_process_packet(psmouse);
 189                         return PSMOUSE_FULL_PACKET;
 190                 }
 191                 return PSMOUSE_GOOD_DATA;
 192         }
 193
 194         if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
 195                 return PSMOUSE_BAD_DATA;
 196
 197         /* Bytes 2 - 6 should have 0 in the highest bit */
 198         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 199             (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
 200                 return PSMOUSE_BAD_DATA;
 201
 202         if (psmouse->pktcnt == 6) {
 203                 alps_process_packet(psmouse);
 204                 return PSMOUSE_FULL_PACKET;
 205         }
 206
 207         return PSMOUSE_GOOD_DATA;
 208 }
 209
 210 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 211 {
 212         struct ps2dev *ps2dev = &psmouse->ps2dev;
 213         static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 214         unsigned char param[4];
 215         int i;
 216
 217         /*
 218          * First try "E6 report".
 219          * ALPS should return 0,0,10 or 0,0,100
 220          */
 221         param[0] = 0;
 222         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 223             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 224             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 225             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 226                 return NULL;
 227
 228         param[0] = param[1] = param[2] = 0xff;
 229         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 230                 return NULL;
 231
 232         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 233
 234         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 235                 return NULL;
 236
 237         /*
 238          * Now try "E7 report". Allowed responses are in
 239          * alps_model_data[].signature
 240          */
 241         param[0] = 0;
 242         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 243             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 244             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 245             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 246                 return NULL;
 247
 248         param[0] = param[1] = param[2] = 0xff;
 249         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 250                 return NULL;
 251
 252         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 253
 254         for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
 255         *version = (param[0] << 8) | (param[1] << 4) | i;
 256
 257         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 258                 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
 259                         return alps_model_data + i;
 260
 261         return NULL;
 262 }
 263
 264 /*
 265  * For DualPoint devices select the device that should respond to
 266  * subsequent commands. It looks like glidepad is behind stickpointer,
 267  * I'd thought it would be other way around...
 268  */
 269 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
 270 {
 271         struct ps2dev *ps2dev = &psmouse->ps2dev;
 272         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 273
 274         if (ps2_command(ps2dev, NULL, cmd) ||
 275             ps2_command(ps2dev, NULL, cmd) ||
 276             ps2_command(ps2dev, NULL, cmd) ||
 277             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 278                 return -1;
 279
 280         /* we may get 3 more bytes, just ignore them */
 281         ps2_drain(ps2dev, 3, 100);
 282
 283         return 0;
 284 }
 285
 286 static int alps_absolute_mode(struct psmouse *psmouse)
 287 {
 288         struct ps2dev *ps2dev = &psmouse->ps2dev;
 289
 290         /* Try ALPS magic knock - 4 disable before enable */
 291         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 292             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 293             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 294             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 295             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 296                 return -1;
 297
 298         /*
 299          * Switch mouse to poll (remote) mode so motion data will not
 300          * get in our way
 301          */
 302         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 303 }
 304
 305 static int alps_get_status(struct psmouse *psmouse, char *param)
 306 {
 307         struct ps2dev *ps2dev = &psmouse->ps2dev;
 308
 309         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 310         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 311             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 312             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 313             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 314                 return -1;
 315
 316         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 317
 318         return 0;
 319 }
 320
 321 /*
 322  * Turn touchpad tapping on or off. The sequences are:
 323  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 324  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 325  * My guess that 0xE9 (GetInfo) is here as a sync point.
 326  * For models that also have stickpointer (DualPoints) its tapping
 327  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 328  * we don't fiddle with it.
 329  */
 330 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 331 {
 332         struct ps2dev *ps2dev = &psmouse->ps2dev;
 333         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 334         unsigned char tap_arg = enable ? 0x0A : 0x00;
 335         unsigned char param[4];
 336
 337         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 338             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 339             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 340             ps2_command(ps2dev, &tap_arg, cmd))
 341                 return -1;
 342
 343         if (alps_get_status(psmouse, param))
 344                 return -1;
 345
 346         return 0;
 347 }
 348
 349 /*
 350  * alps_poll() - poll the touchpad for current motion packet.
 351  * Used in resync.
 352  */
 353 static int alps_poll(struct psmouse *psmouse)
 354 {
 355         struct alps_data *priv = psmouse->private;
 356         unsigned char buf[6];
 357         int poll_failed;
 358
 359         if (priv->i->flags & ALPS_PASS)
 360                 alps_passthrough_mode(psmouse, 1);
 361
 362         poll_failed = ps2_command(&psmouse->ps2dev, buf,
 363                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
 364
 365         if (priv->i->flags & ALPS_PASS)
 366                 alps_passthrough_mode(psmouse, 0);
 367
 368         if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
 369                 return -1;
 370
 371         if ((psmouse->badbyte & 0xc8) == 0x08) {
 372 /*
 373  * Poll the track stick ...
 374  */
 375                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
 376                         return -1;
 377         }
 378
 379         memcpy(psmouse->packet, buf, sizeof(buf));
 380         return 0;
 381 }
 382
 383 static int alps_reconnect(struct psmouse *psmouse)
 384 {
 385         struct alps_data *priv = psmouse->private;
 386         int version;
 387
 388         psmouse_reset(psmouse);
 389
 390         if (!(priv->i = alps_get_model(psmouse, &version)))
 391                 return -1;
 392
 393         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
 394                 return -1;
 395
 396         if (alps_tap_mode(psmouse, 1)) {
 397                 printk(KERN_WARNING "alps.c: Failed to reenable hardware tapping\n");
 398                 return -1;
 399         }
 400
 401         if (alps_absolute_mode(psmouse)) {
 402                 printk(KERN_ERR "alps.c: Failed to reenable absolute mode\n");
 403                 return -1;
 404         }
 405
 406         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
 407                 return -1;
 408
 409         return 0;
 410 }
 411
 412 static void alps_disconnect(struct psmouse *psmouse)
 413 {
 414         struct alps_data *priv = psmouse->private;
 415
 416         psmouse_reset(psmouse);
 417         input_unregister_device(priv->dev2);
 418         kfree(priv);
 419 }
 420
 421 int alps_init(struct psmouse *psmouse)
 422 {
 423         struct alps_data *priv;
 424         struct input_dev *dev1 = psmouse->dev, *dev2;
 425         int version;
 426
 427         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
 428         dev2 = input_allocate_device();
 429         if (!priv || !dev2)
 430                 goto init_fail;
 431
 432         priv->dev2 = dev2;
 433
 434         priv->i = alps_get_model(psmouse, &version);
 435         if (!priv->i)
 436                 goto init_fail;
 437
 438         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
 439                 goto init_fail;
 440
 441         if (alps_tap_mode(psmouse, 1))
 442                 printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 443
 444         if (alps_absolute_mode(psmouse)) {
 445                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 446                 goto init_fail;
 447         }
 448
 449         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
 450                 goto init_fail;
 451
 452         dev1->evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
 453         dev1->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
 454         dev1->keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
 455         dev1->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 456
 457         dev1->evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
 458         input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
 459         input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
 460         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
 461
 462         if (priv->i->flags & ALPS_WHEEL) {
 463                 dev1->evbit[LONG(EV_REL)] |= BIT(EV_REL);
 464                 dev1->relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
 465         }
 466
 467         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 468                 dev1->keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
 469                 dev1->keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
 470         }
 471
 472         snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
 473         dev2->phys = priv->phys;
 474         dev2->name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 475         dev2->id.bustype = BUS_I8042;
 476         dev2->id.vendor  = 0x0002;
 477         dev2->id.product = PSMOUSE_ALPS;
 478         dev2->id.version = 0x0000;
 479
 480         dev2->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 481         dev2->relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
 482         dev2->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 483
 484         if (input_register_device(priv->dev2))
 485                 goto init_fail;
 486
 487         psmouse->protocol_handler = alps_process_byte;
 488         psmouse->poll = alps_poll;
 489         psmouse->disconnect = alps_disconnect;
 490         psmouse->reconnect = alps_reconnect;
 491         psmouse->pktsize = 6;
 492
 493         /* We are having trouble resyncing ALPS touchpads so disable it for now */
 494         psmouse->resync_time = 0;
 495
 496         psmouse->private = priv;
 497         return 0;
 498
 499 init_fail:
 500         psmouse_reset(psmouse);
 501         input_free_device(dev2);
 502         kfree(priv);
 503         return -1;
 504 }
 505
 506 int alps_detect(struct psmouse *psmouse, int set_properties)
 507 {
 508         int version;
 509         const struct alps_model_info *model;
 510
 511         model = alps_get_model(psmouse, &version);
 512         if (!model)
 513                 return -1;
 514
 515         if (set_properties) {
 516                 psmouse->vendor = "ALPS";
 517                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 518                                 "DualPoint TouchPad" : "GlidePoint";
 519                 psmouse->model = version;
 520         }
 521         return 0;
 522 }
 523