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 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      0x04
  34 #define ALPS_4BTN       0x08
  35 #define ALPS_OLDPROTO   0x10
  36 #define ALPS_PASS       0x20
  37
  38 static struct alps_model_info alps_model_data[] = {
  39         { { 0x33, 0x02, 0x0a }, 0x88, 0xf8, ALPS_OLDPROTO },            /* UMAX-530T */
  40         { { 0x53, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  41         { { 0x53, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  42         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  43         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  44         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 },
  45         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },               /* Toshiba Satellite S2400-103 */
  46         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK },               /* NEC Versa L320 */
  47         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  48         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS },                /* Dell Latitude D800 */
  49         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  50         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  51         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  52         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  53         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  54 };
  55
  56 /*
  57  * XXX - this entry is suspicious. First byte has zero lower nibble,
  58  * which is what a normal mouse would report. Also, the value 0x0e
  59  * isn't valid per PS/2 spec.
  60  */
  61
  62 /*
  63  * ALPS abolute Mode - new format
  64  *
  65  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  66  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  67  * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
  68  * byte 3:  0   y9   y8   y7    1    M    R    L
  69  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  70  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  71  *
  72  * ?'s can have different meanings on different models,
  73  * such as wheel rotation, extra buttons, stick buttons
  74  * on a dualpoint, etc.
  75  */
  76
  77 static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
  78 {
  79         struct alps_data *priv = psmouse->private;
  80         unsigned char *packet = psmouse->packet;
  81         struct input_dev *dev = &psmouse->dev;
  82         struct input_dev *dev2 = &priv->dev2;
  83         int x, y, z, ges, fin, left, right, middle;
  84
  85         input_regs(dev, regs);
  86
  87         if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
  88                 input_report_key(dev2, BTN_LEFT,   packet[0] & 1);
  89                 input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
  90                 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
  91                 input_report_rel(dev2, REL_X,
  92                         packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
  93                 input_report_rel(dev2, REL_Y,
  94                         packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
  95                 input_sync(dev2);
  96                 return;
  97         }
  98
  99         if (priv->i->flags & ALPS_OLDPROTO) {
 100                 left = packet[2] & 0x08;
 101                 right = packet[2] & 0x10;
 102                 middle = 0;
 103                 x = packet[1] | ((packet[0] & 0x07) << 7);
 104                 y = packet[4] | ((packet[3] & 0x07) << 7);
 105                 z = packet[5];
 106         } else {
 107                 left = packet[3] & 1;
 108                 right = packet[3] & 2;
 109                 middle = packet[3] & 4;
 110                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 111                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 112                 z = packet[5];
 113         }
 114
 115         ges = packet[2] & 1;
 116         fin = packet[2] & 2;
 117
 118         input_report_key(dev, BTN_LEFT, left);
 119         input_report_key(dev, BTN_RIGHT, right);
 120         input_report_key(dev, BTN_MIDDLE, middle);
 121
 122         if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
 123                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 124                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 125                 input_sync(dev);
 126                 input_sync(dev2);
 127                 return;
 128         }
 129
 130         /* Convert hardware tap to a reasonable Z value */
 131         if (ges && !fin) z = 40;
 132
 133         /*
 134          * A "tap and drag" operation is reported by the hardware as a transition
 135          * from (!fin && ges) to (fin && ges). This should be translated to the
 136          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 137          */
 138         if (ges && fin && !priv->prev_fin) {
 139                 input_report_abs(dev, ABS_X, x);
 140                 input_report_abs(dev, ABS_Y, y);
 141                 input_report_abs(dev, ABS_PRESSURE, 0);
 142                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 143                 input_sync(dev);
 144         }
 145         priv->prev_fin = fin;
 146
 147         if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 148         if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
 149
 150         if (z > 0) {
 151                 input_report_abs(dev, ABS_X, x);
 152                 input_report_abs(dev, ABS_Y, y);
 153         }
 154
 155         input_report_abs(dev, ABS_PRESSURE, z);
 156         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 157
 158
 159         if (priv->i->flags & ALPS_WHEEL)
 160                 input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08));
 161
 162         if (priv->i->flags & ALPS_FW_BK) {
 163                 input_report_key(dev, BTN_FORWARD, packet[0] & 0x10);
 164                 input_report_key(dev, BTN_BACK, packet[2] & 0x04);
 165         }
 166
 167         input_sync(dev);
 168 }
 169
 170 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
 171 {
 172         struct alps_data *priv = psmouse->private;
 173
 174         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 175                 if (psmouse->pktcnt == 3) {
 176                         alps_process_packet(psmouse, regs);
 177                         return PSMOUSE_FULL_PACKET;
 178                 }
 179                 return PSMOUSE_GOOD_DATA;
 180         }
 181
 182         if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
 183                 return PSMOUSE_BAD_DATA;
 184
 185         /* Bytes 2 - 6 should have 0 in the highest bit */
 186         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 187             (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
 188                 return PSMOUSE_BAD_DATA;
 189
 190         if (psmouse->pktcnt == 6) {
 191                 alps_process_packet(psmouse, regs);
 192                 return PSMOUSE_FULL_PACKET;
 193         }
 194
 195         return PSMOUSE_GOOD_DATA;
 196 }
 197
 198 static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 199 {
 200         struct ps2dev *ps2dev = &psmouse->ps2dev;
 201         unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 202         unsigned char param[4];
 203         int i;
 204
 205         /*
 206          * First try "E6 report".
 207          * ALPS should return 0,0,10 or 0,0,100
 208          */
 209         param[0] = 0;
 210         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 211             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 212             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 213             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 214                 return NULL;
 215
 216         param[0] = param[1] = param[2] = 0xff;
 217         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 218                 return NULL;
 219
 220         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 221
 222         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 223                 return NULL;
 224
 225         /*
 226          * Now try "E7 report". Allowed responses are in
 227          * alps_model_data[].signature
 228          */
 229         param[0] = 0;
 230         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 231             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 232             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 233             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 234                 return NULL;
 235
 236         param[0] = param[1] = param[2] = 0xff;
 237         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 238                 return NULL;
 239
 240         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 241
 242         for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
 243         *version = (param[0] << 8) | (param[1] << 4) | i;
 244
 245         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 246                 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
 247                         return alps_model_data + i;
 248
 249         return NULL;
 250 }
 251
 252 /*
 253  * For DualPoint devices select the device that should respond to
 254  * subsequent commands. It looks like glidepad is behind stickpointer,
 255  * I'd thought it would be other way around...
 256  */
 257 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
 258 {
 259         struct ps2dev *ps2dev = &psmouse->ps2dev;
 260         unsigned char param[3];
 261         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 262
 263         if (ps2_command(ps2dev, NULL, cmd) ||
 264             ps2_command(ps2dev, NULL, cmd) ||
 265             ps2_command(ps2dev, NULL, cmd) ||
 266             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 267                 return -1;
 268
 269         /* we may get 3 more bytes, just ignore them */
 270         ps2_command(ps2dev, param, 0x0300);
 271
 272         return 0;
 273 }
 274
 275 static int alps_absolute_mode(struct psmouse *psmouse)
 276 {
 277         struct ps2dev *ps2dev = &psmouse->ps2dev;
 278
 279         /* Try ALPS magic knock - 4 disable before enable */
 280         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 281             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 282             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 283             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 284             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 285                 return -1;
 286
 287         /*
 288          * Switch mouse to poll (remote) mode so motion data will not
 289          * get in our way
 290          */
 291         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 292 }
 293
 294 static int alps_get_status(struct psmouse *psmouse, char *param)
 295 {
 296         struct ps2dev *ps2dev = &psmouse->ps2dev;
 297
 298         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 299         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 300             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 301             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 302             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 303                 return -1;
 304
 305         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 306
 307         return 0;
 308 }
 309
 310 /*
 311  * Turn touchpad tapping on or off. The sequences are:
 312  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 313  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 314  * My guess that 0xE9 (GetInfo) is here as a sync point.
 315  * For models that also have stickpointer (DualPoints) its tapping
 316  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 317  * we don't fiddle with it.
 318  */
 319 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 320 {
 321         struct ps2dev *ps2dev = &psmouse->ps2dev;
 322         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 323         unsigned char tap_arg = enable ? 0x0A : 0x00;
 324         unsigned char param[4];
 325
 326         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 327             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 328             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 329             ps2_command(ps2dev, &tap_arg, cmd))
 330                 return -1;
 331
 332         if (alps_get_status(psmouse, param))
 333                 return -1;
 334
 335         return 0;
 336 }
 337
 338 static int alps_reconnect(struct psmouse *psmouse)
 339 {
 340         struct alps_data *priv = psmouse->private;
 341         unsigned char param[4];
 342         int version;
 343
 344         psmouse_reset(psmouse);
 345
 346         if (!(priv->i = alps_get_model(psmouse, &version)))
 347                 return -1;
 348
 349         if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1))
 350                 return -1;
 351
 352         if (alps_get_status(psmouse, param))
 353                 return -1;
 354
 355         if (param[0] & 0x04)
 356                 alps_tap_mode(psmouse, 1);
 357
 358         if (alps_absolute_mode(psmouse)) {
 359                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 360                 return -1;
 361         }
 362
 363         if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0))
 364                 return -1;
 365
 366         return 0;
 367 }
 368
 369 static void alps_disconnect(struct psmouse *psmouse)
 370 {
 371         struct alps_data *priv = psmouse->private;
 372         psmouse_reset(psmouse);
 373         input_unregister_device(&priv->dev2);
 374         kfree(priv);
 375 }
 376
 377 int alps_init(struct psmouse *psmouse)
 378 {
 379         struct alps_data *priv;
 380         unsigned char param[4];
 381         int version;
 382
 383         psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);
 384         if (!priv)
 385                 goto init_fail;
 386         memset(priv, 0, sizeof(struct alps_data));
 387
 388         if (!(priv->i = alps_get_model(psmouse, &version)))
 389                 goto init_fail;
 390
 391         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
 392                 goto init_fail;
 393
 394         if (alps_get_status(psmouse, param)) {
 395                 printk(KERN_ERR "alps.c: touchpad status report request failed\n");
 396                 goto init_fail;
 397         }
 398
 399         if (param[0] & 0x04) {
 400                 printk(KERN_INFO "alps.c: Enabling hardware tapping\n");
 401                 if (alps_tap_mode(psmouse, 1))
 402                         printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 403         }
 404
 405         if (alps_absolute_mode(psmouse)) {
 406                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 407                 goto init_fail;
 408         }
 409
 410         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
 411                 goto init_fail;
 412
 413         psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
 414         psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
 415         psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
 416         psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 417
 418         psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
 419         input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
 420         input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
 421         input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
 422
 423         if (priv->i->flags & ALPS_WHEEL) {
 424                 psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);
 425                 psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
 426         }
 427
 428         if (priv->i->flags & ALPS_FW_BK) {
 429                 psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
 430                 psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
 431         }
 432
 433         sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);
 434         priv->dev2.phys = priv->phys;
 435         priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 436         priv->dev2.id.bustype = BUS_I8042;
 437         priv->dev2.id.vendor = 0x0002;
 438         priv->dev2.id.product = PSMOUSE_ALPS;
 439         priv->dev2.id.version = 0x0000;
 440
 441         priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 442         priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
 443         priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 444
 445         input_register_device(&priv->dev2);
 446
 447         printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);
 448
 449         psmouse->protocol_handler = alps_process_byte;
 450         psmouse->disconnect = alps_disconnect;
 451         psmouse->reconnect = alps_reconnect;
 452         psmouse->pktsize = 6;
 453
 454         return 0;
 455
 456 init_fail:
 457         kfree(priv);
 458         return -1;
 459 }
 460
 461 int alps_detect(struct psmouse *psmouse, int set_properties)
 462 {
 463         int version;
 464         struct alps_model_info *model;
 465
 466         if (!(model = alps_get_model(psmouse, &version)))
 467                 return -1;
 468
 469         if (set_properties) {
 470                 psmouse->vendor = "ALPS";
 471                 if (model->flags & ALPS_DUALPOINT)
 472                         psmouse->name = "DualPoint TouchPad";
 473                 else
 474                         psmouse->name = "GlidePoint";
 475                 psmouse->model = version;
 476         }
 477         return 0;
 478 }
 479