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_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 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         { { 0x63, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  44         { { 0x63, 0x02, 0x14 }, 0xf8, 0xf8, 0 },
  45         { { 0x63, 0x02, 0x28 }, 0xf8, 0xf8, 0 },
  46         { { 0x63, 0x02, 0x3c }, 0x8f, 0x8f, ALPS_WHEEL },               /* Toshiba Satellite S2400-103 */
  47         { { 0x63, 0x02, 0x50 }, 0xef, 0xef, ALPS_FW_BK_1 },             /* NEC Versa L320 */
  48         { { 0x63, 0x02, 0x64 }, 0xf8, 0xf8, 0 },
  49         { { 0x63, 0x03, 0xc8 }, 0xf8, 0xf8, ALPS_PASS },                /* Dell Latitude D800 */
  50         { { 0x73, 0x02, 0x0a }, 0xf8, 0xf8, 0 },
  51         { { 0x73, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_FW_BK_2 },             /* Ahtec Laptop */
  52         { { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
  53         { { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
  54         { { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
  55 };
  56
  57 /*
  58  * XXX - this entry is suspicious. First byte has zero lower nibble,
  59  * which is what a normal mouse would report. Also, the value 0x0e
  60  * isn't valid per PS/2 spec.
  61  */
  62
  63 /*
  64  * ALPS abolute Mode - new format
  65  *
  66  * byte 0:  1    ?    ?    ?    1    ?    ?    ?
  67  * byte 1:  0   x6   x5   x4   x3   x2   x1   x0
  68  * byte 2:  0   x10  x9   x8   x7    ?  fin  ges
  69  * byte 3:  0   y9   y8   y7    1    M    R    L
  70  * byte 4:  0   y6   y5   y4   y3   y2   y1   y0
  71  * byte 5:  0   z6   z5   z4   z3   z2   z1   z0
  72  *
  73  * ?'s can have different meanings on different models,
  74  * such as wheel rotation, extra buttons, stick buttons
  75  * on a dualpoint, etc.
  76  */
  77
  78 static void alps_process_packet(struct psmouse *psmouse, struct pt_regs *regs)
  79 {
  80         struct alps_data *priv = psmouse->private;
  81         unsigned char *packet = psmouse->packet;
  82         struct input_dev *dev = &psmouse->dev;
  83         struct input_dev *dev2 = &priv->dev2;
  84         int x, y, z, ges, fin, left, right, middle;
  85         int back = 0, forward = 0;
  86
  87         input_regs(dev, regs);
  88
  89         if ((packet[0] & 0xc8) == 0x08) {   /* 3-byte PS/2 packet */
  90                 input_report_key(dev2, BTN_LEFT,   packet[0] & 1);
  91                 input_report_key(dev2, BTN_RIGHT,  packet[0] & 2);
  92                 input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
  93                 input_report_rel(dev2, REL_X,
  94                         packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
  95                 input_report_rel(dev2, REL_Y,
  96                         packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
  97                 input_sync(dev2);
  98                 return;
  99         }
 100
 101         if (priv->i->flags & ALPS_OLDPROTO) {
 102                 left = packet[2] & 0x08;
 103                 right = packet[2] & 0x10;
 104                 middle = 0;
 105                 x = packet[1] | ((packet[0] & 0x07) << 7);
 106                 y = packet[4] | ((packet[3] & 0x07) << 7);
 107                 z = packet[5];
 108         } else {
 109                 left = packet[3] & 1;
 110                 right = packet[3] & 2;
 111                 middle = packet[3] & 4;
 112                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
 113                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
 114                 z = packet[5];
 115         }
 116
 117         if (priv->i->flags & ALPS_FW_BK_1) {
 118                 back = packet[2] & 4;
 119                 forward = packet[0] & 0x10;
 120         }
 121
 122         if (priv->i->flags & ALPS_FW_BK_2) {
 123                 back = packet[3] & 4;
 124                 forward = packet[2] & 4;
 125                 if ((middle = forward && back))
 126                         forward = back = 0;
 127         }
 128
 129         ges = packet[2] & 1;
 130         fin = packet[2] & 2;
 131
 132         input_report_key(dev, BTN_LEFT, left);
 133         input_report_key(dev, BTN_RIGHT, right);
 134         input_report_key(dev, BTN_MIDDLE, middle);
 135
 136         if ((priv->i->flags & ALPS_DUALPOINT) && z == 127) {
 137                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
 138                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
 139                 input_sync(dev);
 140                 input_sync(dev2);
 141                 return;
 142         }
 143
 144         /* Convert hardware tap to a reasonable Z value */
 145         if (ges && !fin) z = 40;
 146
 147         /*
 148          * A "tap and drag" operation is reported by the hardware as a transition
 149          * from (!fin && ges) to (fin && ges). This should be translated to the
 150          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
 151          */
 152         if (ges && fin && !priv->prev_fin) {
 153                 input_report_abs(dev, ABS_X, x);
 154                 input_report_abs(dev, ABS_Y, y);
 155                 input_report_abs(dev, ABS_PRESSURE, 0);
 156                 input_report_key(dev, BTN_TOOL_FINGER, 0);
 157                 input_sync(dev);
 158         }
 159         priv->prev_fin = fin;
 160
 161         if (z > 30) input_report_key(dev, BTN_TOUCH, 1);
 162         if (z < 25) input_report_key(dev, BTN_TOUCH, 0);
 163
 164         if (z > 0) {
 165                 input_report_abs(dev, ABS_X, x);
 166                 input_report_abs(dev, ABS_Y, y);
 167         }
 168
 169         input_report_abs(dev, ABS_PRESSURE, z);
 170         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
 171
 172         if (priv->i->flags & ALPS_WHEEL)
 173                 input_report_rel(dev, REL_WHEEL, ((packet[0] >> 4) & 0x07) | ((packet[2] >> 2) & 0x08));
 174
 175         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 176                 input_report_key(dev, BTN_FORWARD, forward);
 177                 input_report_key(dev, BTN_BACK, back);
 178         }
 179
 180         input_sync(dev);
 181 }
 182
 183 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
 184 {
 185         struct alps_data *priv = psmouse->private;
 186
 187         if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
 188                 if (psmouse->pktcnt == 3) {
 189                         alps_process_packet(psmouse, regs);
 190                         return PSMOUSE_FULL_PACKET;
 191                 }
 192                 return PSMOUSE_GOOD_DATA;
 193         }
 194
 195         if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
 196                 return PSMOUSE_BAD_DATA;
 197
 198         /* Bytes 2 - 6 should have 0 in the highest bit */
 199         if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
 200             (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
 201                 return PSMOUSE_BAD_DATA;
 202
 203         if (psmouse->pktcnt == 6) {
 204                 alps_process_packet(psmouse, regs);
 205                 return PSMOUSE_FULL_PACKET;
 206         }
 207
 208         return PSMOUSE_GOOD_DATA;
 209 }
 210
 211 static struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
 212 {
 213         struct ps2dev *ps2dev = &psmouse->ps2dev;
 214         unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
 215         unsigned char param[4];
 216         int i;
 217
 218         /*
 219          * First try "E6 report".
 220          * ALPS should return 0,0,10 or 0,0,100
 221          */
 222         param[0] = 0;
 223         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 224             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 225             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11) ||
 226             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE11))
 227                 return NULL;
 228
 229         param[0] = param[1] = param[2] = 0xff;
 230         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 231                 return NULL;
 232
 233         dbg("E6 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 234
 235         if (param[0] != 0 || param[1] != 0 || (param[2] != 10 && param[2] != 100))
 236                 return NULL;
 237
 238         /*
 239          * Now try "E7 report". Allowed responses are in
 240          * alps_model_data[].signature
 241          */
 242         param[0] = 0;
 243         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
 244             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 245             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21) ||
 246             ps2_command(ps2dev,  NULL, PSMOUSE_CMD_SETSCALE21))
 247                 return NULL;
 248
 249         param[0] = param[1] = param[2] = 0xff;
 250         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 251                 return NULL;
 252
 253         dbg("E7 report: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 254
 255         for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++);
 256         *version = (param[0] << 8) | (param[1] << 4) | i;
 257
 258         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++)
 259                 if (!memcmp(param, alps_model_data[i].signature, sizeof(alps_model_data[i].signature)))
 260                         return alps_model_data + i;
 261
 262         return NULL;
 263 }
 264
 265 /*
 266  * For DualPoint devices select the device that should respond to
 267  * subsequent commands. It looks like glidepad is behind stickpointer,
 268  * I'd thought it would be other way around...
 269  */
 270 static int alps_passthrough_mode(struct psmouse *psmouse, int enable)
 271 {
 272         struct ps2dev *ps2dev = &psmouse->ps2dev;
 273         unsigned char param[3];
 274         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
 275
 276         if (ps2_command(ps2dev, NULL, cmd) ||
 277             ps2_command(ps2dev, NULL, cmd) ||
 278             ps2_command(ps2dev, NULL, cmd) ||
 279             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
 280                 return -1;
 281
 282         /* we may get 3 more bytes, just ignore them */
 283         ps2_command(ps2dev, param, 0x0300);
 284
 285         return 0;
 286 }
 287
 288 static int alps_absolute_mode(struct psmouse *psmouse)
 289 {
 290         struct ps2dev *ps2dev = &psmouse->ps2dev;
 291
 292         /* Try ALPS magic knock - 4 disable before enable */
 293         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 294             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 295             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 296             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 297             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
 298                 return -1;
 299
 300         /*
 301          * Switch mouse to poll (remote) mode so motion data will not
 302          * get in our way
 303          */
 304         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
 305 }
 306
 307 static int alps_get_status(struct psmouse *psmouse, char *param)
 308 {
 309         struct ps2dev *ps2dev = &psmouse->ps2dev;
 310
 311         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
 312         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 313             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 314             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 315             ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 316                 return -1;
 317
 318         dbg("Status: %2.2x %2.2x %2.2x", param[0], param[1], param[2]);
 319
 320         return 0;
 321 }
 322
 323 /*
 324  * Turn touchpad tapping on or off. The sequences are:
 325  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
 326  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
 327  * My guess that 0xE9 (GetInfo) is here as a sync point.
 328  * For models that also have stickpointer (DualPoints) its tapping
 329  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
 330  * we don't fiddle with it.
 331  */
 332 static int alps_tap_mode(struct psmouse *psmouse, int enable)
 333 {
 334         struct ps2dev *ps2dev = &psmouse->ps2dev;
 335         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
 336         unsigned char tap_arg = enable ? 0x0A : 0x00;
 337         unsigned char param[4];
 338
 339         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
 340             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 341             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
 342             ps2_command(ps2dev, &tap_arg, cmd))
 343                 return -1;
 344
 345         if (alps_get_status(psmouse, param))
 346                 return -1;
 347
 348         return 0;
 349 }
 350
 351 static int alps_reconnect(struct psmouse *psmouse)
 352 {
 353         struct alps_data *priv = psmouse->private;
 354         unsigned char param[4];
 355         int version;
 356
 357         psmouse_reset(psmouse);
 358
 359         if (!(priv->i = alps_get_model(psmouse, &version)))
 360                 return -1;
 361
 362         if (priv->i->flags & ALPS_PASS && alps_passthrough_mode(psmouse, 1))
 363                 return -1;
 364
 365         if (alps_get_status(psmouse, param))
 366                 return -1;
 367
 368         if (param[0] & 0x04)
 369                 alps_tap_mode(psmouse, 1);
 370
 371         if (alps_absolute_mode(psmouse)) {
 372                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 373                 return -1;
 374         }
 375
 376         if (priv->i->flags == ALPS_PASS && alps_passthrough_mode(psmouse, 0))
 377                 return -1;
 378
 379         return 0;
 380 }
 381
 382 static void alps_disconnect(struct psmouse *psmouse)
 383 {
 384         struct alps_data *priv = psmouse->private;
 385         psmouse_reset(psmouse);
 386         input_unregister_device(&priv->dev2);
 387         kfree(priv);
 388 }
 389
 390 int alps_init(struct psmouse *psmouse)
 391 {
 392         struct alps_data *priv;
 393         unsigned char param[4];
 394         int version;
 395
 396         psmouse->private = priv = kmalloc(sizeof(struct alps_data), GFP_KERNEL);
 397         if (!priv)
 398                 goto init_fail;
 399         memset(priv, 0, sizeof(struct alps_data));
 400
 401         if (!(priv->i = alps_get_model(psmouse, &version)))
 402                 goto init_fail;
 403
 404         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 1))
 405                 goto init_fail;
 406
 407         if (alps_get_status(psmouse, param)) {
 408                 printk(KERN_ERR "alps.c: touchpad status report request failed\n");
 409                 goto init_fail;
 410         }
 411
 412         if (param[0] & 0x04) {
 413                 printk(KERN_INFO "alps.c: Enabling hardware tapping\n");
 414                 if (alps_tap_mode(psmouse, 1))
 415                         printk(KERN_WARNING "alps.c: Failed to enable hardware tapping\n");
 416         }
 417
 418         if (alps_absolute_mode(psmouse)) {
 419                 printk(KERN_ERR "alps.c: Failed to enable absolute mode\n");
 420                 goto init_fail;
 421         }
 422
 423         if ((priv->i->flags & ALPS_PASS) && alps_passthrough_mode(psmouse, 0))
 424                 goto init_fail;
 425
 426         psmouse->dev.evbit[LONG(EV_KEY)] |= BIT(EV_KEY);
 427         psmouse->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
 428         psmouse->dev.keybit[LONG(BTN_TOOL_FINGER)] |= BIT(BTN_TOOL_FINGER);
 429         psmouse->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 430
 431         psmouse->dev.evbit[LONG(EV_ABS)] |= BIT(EV_ABS);
 432         input_set_abs_params(&psmouse->dev, ABS_X, 0, 1023, 0, 0);
 433         input_set_abs_params(&psmouse->dev, ABS_Y, 0, 767, 0, 0);
 434         input_set_abs_params(&psmouse->dev, ABS_PRESSURE, 0, 127, 0, 0);
 435
 436         if (priv->i->flags & ALPS_WHEEL) {
 437                 psmouse->dev.evbit[LONG(EV_REL)] |= BIT(EV_REL);
 438                 psmouse->dev.relbit[LONG(REL_WHEEL)] |= BIT(REL_WHEEL);
 439         }
 440
 441         if (priv->i->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
 442                 psmouse->dev.keybit[LONG(BTN_FORWARD)] |= BIT(BTN_FORWARD);
 443                 psmouse->dev.keybit[LONG(BTN_BACK)] |= BIT(BTN_BACK);
 444         }
 445
 446         sprintf(priv->phys, "%s/input1", psmouse->ps2dev.serio->phys);
 447         priv->dev2.phys = priv->phys;
 448         priv->dev2.name = (priv->i->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
 449         priv->dev2.id.bustype = BUS_I8042;
 450         priv->dev2.id.vendor = 0x0002;
 451         priv->dev2.id.product = PSMOUSE_ALPS;
 452         priv->dev2.id.version = 0x0000;
 453
 454         priv->dev2.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 455         priv->dev2.relbit[LONG(REL_X)] |= BIT(REL_X) | BIT(REL_Y);
 456         priv->dev2.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
 457
 458         input_register_device(&priv->dev2);
 459
 460         printk(KERN_INFO "input: %s on %s\n", priv->dev2.name, psmouse->ps2dev.serio->phys);
 461
 462         psmouse->protocol_handler = alps_process_byte;
 463         psmouse->disconnect = alps_disconnect;
 464         psmouse->reconnect = alps_reconnect;
 465         psmouse->pktsize = 6;
 466
 467         return 0;
 468
 469 init_fail:
 470         kfree(priv);
 471         return -1;
 472 }
 473
 474 int alps_detect(struct psmouse *psmouse, int set_properties)
 475 {
 476         int version;
 477         struct alps_model_info *model;
 478
 479         if (!(model = alps_get_model(psmouse, &version)))
 480                 return -1;
 481
 482         if (set_properties) {
 483                 psmouse->vendor = "ALPS";
 484                 psmouse->name = model->flags & ALPS_DUALPOINT ?
 485                                 "DualPoint TouchPad" : "GlidePoint";
 486                 psmouse->model = version;
 487         }
 488         return 0;
 489 }
 490