drivers/input/mouse/sentelic.c

   1 /*-
   2  * Finger Sensing Pad PS/2 mouse driver.
   3  *
   4  * Copyright (C) 2005-2007 Asia Vital Components Co., Ltd.
   5  * Copyright (C) 2005-2012 Tai-hwa Liang, Sentelic Corporation.
   6  *
   7  *   This program is free software; you can redistribute it and/or
   8  *   modify it under the terms of the GNU General Public License
   9  *   as published by the Free Software Foundation; either version 2
  10  *   of the License, or (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/input.h>
  24 #include <linux/input/mt.h>
  25 #include <linux/ctype.h>
  26 #include <linux/libps2.h>
  27 #include <linux/serio.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/slab.h>
  30
  31 #include "psmouse.h"
  32 #include "sentelic.h"
  33
  34 /*
  35  * Timeout for FSP PS/2 command only (in milliseconds).
  36  */
  37 #define FSP_CMD_TIMEOUT         200
  38 #define FSP_CMD_TIMEOUT2        30
  39
  40 #define GET_ABS_X(packet)       ((packet[1] << 2) | ((packet[3] >> 2) & 0x03))
  41 #define GET_ABS_Y(packet)       ((packet[2] << 2) | (packet[3] & 0x03))
  42
  43 /** Driver version. */
  44 static const char fsp_drv_ver[] = "1.1.0-K";
  45
  46 /*
  47  * Make sure that the value being sent to FSP will not conflict with
  48  * possible sample rate values.
  49  */
  50 static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
  51 {
  52         switch (reg_val) {
  53         case 10: case 20: case 40: case 60: case 80: case 100: case 200:
  54                 /*
  55                  * The requested value being sent to FSP matched to possible
  56                  * sample rates, swap the given value such that the hardware
  57                  * wouldn't get confused.
  58                  */
  59                 return (reg_val >> 4) | (reg_val << 4);
  60         default:
  61                 return reg_val; /* swap isn't necessary */
  62         }
  63 }
  64
  65 /*
  66  * Make sure that the value being sent to FSP will not conflict with certain
  67  * commands.
  68  */
  69 static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
  70 {
  71         switch (reg_val) {
  72         case 0xe9: case 0xee: case 0xf2: case 0xff:
  73                 /*
  74                  * The requested value being sent to FSP matched to certain
  75                  * commands, inverse the given value such that the hardware
  76                  * wouldn't get confused.
  77                  */
  78                 return ~reg_val;
  79         default:
  80                 return reg_val; /* inversion isn't necessary */
  81         }
  82 }
  83
  84 static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
  85 {
  86         struct ps2dev *ps2dev = &psmouse->ps2dev;
  87         unsigned char param[3];
  88         unsigned char addr;
  89         int rc = -1;
  90
  91         /*
  92          * We need to shut off the device and switch it into command
  93          * mode so we don't confuse our protocol handler. We don't need
  94          * to do that for writes because sysfs set helper does this for
  95          * us.
  96          */
  97         psmouse_deactivate(psmouse);
  98
  99         ps2_begin_command(ps2dev);
 100
 101         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 102                 goto out;
 103
 104         /* should return 0xfe(request for resending) */
 105         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 106         /* should return 0xfc(failed) */
 107         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 108
 109         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 110                 goto out;
 111
 112         if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 113                 ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
 114         } else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 115                 /* swapping is required */
 116                 ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
 117                 /* expect 0xfe */
 118         } else {
 119                 /* swapping isn't necessary */
 120                 ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 121                 /* expect 0xfe */
 122         }
 123         /* should return 0xfc(failed) */
 124         ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
 125
 126         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
 127                 goto out;
 128
 129         *reg_val = param[2];
 130         rc = 0;
 131
 132  out:
 133         ps2_end_command(ps2dev);
 134         psmouse_activate(psmouse);
 135         psmouse_dbg(psmouse,
 136                     "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
 137                     reg_addr, *reg_val, rc);
 138         return rc;
 139 }
 140
 141 static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
 142 {
 143         struct ps2dev *ps2dev = &psmouse->ps2dev;
 144         unsigned char v;
 145         int rc = -1;
 146
 147         ps2_begin_command(ps2dev);
 148
 149         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 150                 goto out;
 151
 152         if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 153                 /* inversion is required */
 154                 ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
 155         } else {
 156                 if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 157                         /* swapping is required */
 158                         ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
 159                 } else {
 160                         /* swapping isn't necessary */
 161                         ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
 162                 }
 163         }
 164         /* write the register address in correct order */
 165         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 166
 167         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 168                 goto out;
 169
 170         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 171                 /* inversion is required */
 172                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 173         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 174                 /* swapping is required */
 175                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 176         } else {
 177                 /* swapping isn't necessary */
 178                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 179         }
 180
 181         /* write the register value in correct order */
 182         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 183         rc = 0;
 184
 185  out:
 186         ps2_end_command(ps2dev);
 187         psmouse_dbg(psmouse,
 188                     "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
 189                     reg_addr, reg_val, rc);
 190         return rc;
 191 }
 192
 193 /* Enable register clock gating for writing certain registers */
 194 static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
 195 {
 196         int v, nv;
 197
 198         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
 199                 return -1;
 200
 201         if (enable)
 202                 nv = v | FSP_BIT_EN_REG_CLK;
 203         else
 204                 nv = v & ~FSP_BIT_EN_REG_CLK;
 205
 206         /* only write if necessary */
 207         if (nv != v)
 208                 if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
 209                         return -1;
 210
 211         return 0;
 212 }
 213
 214 static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
 215 {
 216         struct ps2dev *ps2dev = &psmouse->ps2dev;
 217         unsigned char param[3];
 218         int rc = -1;
 219
 220         psmouse_deactivate(psmouse);
 221
 222         ps2_begin_command(ps2dev);
 223
 224         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 225                 goto out;
 226
 227         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 228         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 229
 230         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 231                 goto out;
 232
 233         ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
 234         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 235
 236         /* get the returned result */
 237         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 238                 goto out;
 239
 240         *reg_val = param[2];
 241         rc = 0;
 242
 243  out:
 244         ps2_end_command(ps2dev);
 245         psmouse_activate(psmouse);
 246         psmouse_dbg(psmouse,
 247                     "READ PAGE REG: 0x%02x (rc = %d)\n",
 248                     *reg_val, rc);
 249         return rc;
 250 }
 251
 252 static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
 253 {
 254         struct ps2dev *ps2dev = &psmouse->ps2dev;
 255         unsigned char v;
 256         int rc = -1;
 257
 258         ps2_begin_command(ps2dev);
 259
 260         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 261                 goto out;
 262
 263         ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
 264         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 265
 266         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 267                 goto out;
 268
 269         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 270                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 271         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 272                 /* swapping is required */
 273                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 274         } else {
 275                 /* swapping isn't necessary */
 276                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 277         }
 278
 279         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 280         rc = 0;
 281
 282  out:
 283         ps2_end_command(ps2dev);
 284         psmouse_dbg(psmouse,
 285                     "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
 286                     reg_val, rc);
 287         return rc;
 288 }
 289
 290 static int fsp_get_version(struct psmouse *psmouse, int *version)
 291 {
 292         if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
 293                 return -EIO;
 294
 295         return 0;
 296 }
 297
 298 static int fsp_get_revision(struct psmouse *psmouse, int *rev)
 299 {
 300         if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
 301                 return -EIO;
 302
 303         return 0;
 304 }
 305
 306 static int fsp_get_sn(struct psmouse *psmouse, int *sn)
 307 {
 308         int v0, v1, v2;
 309         int rc = -EIO;
 310
 311         /* production number since Cx is available at: 0x0b40 ~ 0x0b42 */
 312         if (fsp_page_reg_write(psmouse, FSP_PAGE_0B))
 313                 goto out;
 314         if (fsp_reg_read(psmouse, FSP_REG_SN0, &v0))
 315                 goto out;
 316         if (fsp_reg_read(psmouse, FSP_REG_SN1, &v1))
 317                 goto out;
 318         if (fsp_reg_read(psmouse, FSP_REG_SN2, &v2))
 319                 goto out;
 320         *sn = (v0 << 16) | (v1 << 8) | v2;
 321         rc = 0;
 322 out:
 323         fsp_page_reg_write(psmouse, FSP_PAGE_DEFAULT);
 324         return rc;
 325 }
 326
 327 static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
 328 {
 329         static const int buttons[] = {
 330                 0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
 331                 0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 332                 0x04, /* Left/Middle/Right & Scroll Up/Down */
 333                 0x02, /* Left/Middle/Right */
 334         };
 335         int val;
 336
 337         if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS, &val) == -1)
 338                 return -EIO;
 339
 340         *btn = buttons[(val & 0x30) >> 4];
 341         return 0;
 342 }
 343
 344 /* Enable on-pad command tag output */
 345 static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
 346 {
 347         int v, nv;
 348         int res = 0;
 349
 350         if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
 351                 psmouse_err(psmouse, "Unable get OPC state.\n");
 352                 return -EIO;
 353         }
 354
 355         if (enable)
 356                 nv = v | FSP_BIT_EN_OPC_TAG;
 357         else
 358                 nv = v & ~FSP_BIT_EN_OPC_TAG;
 359
 360         /* only write if necessary */
 361         if (nv != v) {
 362                 fsp_reg_write_enable(psmouse, true);
 363                 res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
 364                 fsp_reg_write_enable(psmouse, false);
 365         }
 366
 367         if (res != 0) {
 368                 psmouse_err(psmouse, "Unable to enable OPC tag.\n");
 369                 res = -EIO;
 370         }
 371
 372         return res;
 373 }
 374
 375 static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
 376 {
 377         struct fsp_data *pad = psmouse->private;
 378         int val;
 379
 380         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 381                 return -EIO;
 382
 383         pad->vscroll = enable;
 384
 385         if (enable)
 386                 val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
 387         else
 388                 val &= ~FSP_BIT_FIX_VSCR;
 389
 390         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 391                 return -EIO;
 392
 393         return 0;
 394 }
 395
 396 static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
 397 {
 398         struct fsp_data *pad = psmouse->private;
 399         int val, v2;
 400
 401         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 402                 return -EIO;
 403
 404         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
 405                 return -EIO;
 406
 407         pad->hscroll = enable;
 408
 409         if (enable) {
 410                 val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
 411                 v2 |= FSP_BIT_EN_MSID6;
 412         } else {
 413                 val &= ~FSP_BIT_FIX_HSCR;
 414                 v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
 415         }
 416
 417         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 418                 return -EIO;
 419
 420         /* reconfigure horizontal scrolling packet output */
 421         if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
 422                 return -EIO;
 423
 424         return 0;
 425 }
 426
 427 /*
 428  * Write device specific initial parameters.
 429  *
 430  * ex: 0xab 0xcd - write oxcd into register 0xab
 431  */
 432 static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
 433                                    const char *buf, size_t count)
 434 {
 435         unsigned int reg, val;
 436         char *rest;
 437         ssize_t retval;
 438
 439         reg = simple_strtoul(buf, &rest, 16);
 440         if (rest == buf || *rest != ' ' || reg > 0xff)
 441                 return -EINVAL;
 442
 443         retval = kstrtouint(rest + 1, 16, &val);
 444         if (retval)
 445                 return retval;
 446
 447         if (val > 0xff)
 448                 return -EINVAL;
 449
 450         if (fsp_reg_write_enable(psmouse, true))
 451                 return -EIO;
 452
 453         retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
 454
 455         fsp_reg_write_enable(psmouse, false);
 456
 457         return count;
 458 }
 459
 460 PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
 461
 462 static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
 463                                         void *data, char *buf)
 464 {
 465         struct fsp_data *pad = psmouse->private;
 466
 467         return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
 468 }
 469
 470 /*
 471  * Read a register from device.
 472  *
 473  * ex: 0xab -- read content from register 0xab
 474  */
 475 static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
 476                                         const char *buf, size_t count)
 477 {
 478         struct fsp_data *pad = psmouse->private;
 479         unsigned int reg, val;
 480         int err;
 481
 482         err = kstrtouint(buf, 16, &reg);
 483         if (err)
 484                 return err;
 485
 486         if (reg > 0xff)
 487                 return -EINVAL;
 488
 489         if (fsp_reg_read(psmouse, reg, &val))
 490                 return -EIO;
 491
 492         pad->last_reg = reg;
 493         pad->last_val = val;
 494
 495         return count;
 496 }
 497
 498 PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
 499                         fsp_attr_show_getreg, fsp_attr_set_getreg);
 500
 501 static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
 502                                         void *data, char *buf)
 503 {
 504         int val = 0;
 505
 506         if (fsp_page_reg_read(psmouse, &val))
 507                 return -EIO;
 508
 509         return sprintf(buf, "%02x\n", val);
 510 }
 511
 512 static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
 513                                         const char *buf, size_t count)
 514 {
 515         unsigned int val;
 516         int err;
 517
 518         err = kstrtouint(buf, 16, &val);
 519         if (err)
 520                 return err;
 521
 522         if (val > 0xff)
 523                 return -EINVAL;
 524
 525         if (fsp_page_reg_write(psmouse, val))
 526                 return -EIO;
 527
 528         return count;
 529 }
 530
 531 PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
 532                         fsp_attr_show_pagereg, fsp_attr_set_pagereg);
 533
 534 static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
 535                                         void *data, char *buf)
 536 {
 537         struct fsp_data *pad = psmouse->private;
 538
 539         return sprintf(buf, "%d\n", pad->vscroll);
 540 }
 541
 542 static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
 543                                         const char *buf, size_t count)
 544 {
 545         unsigned int val;
 546         int err;
 547
 548         err = kstrtouint(buf, 10, &val);
 549         if (err)
 550                 return err;
 551
 552         if (val > 1)
 553                 return -EINVAL;
 554
 555         fsp_onpad_vscr(psmouse, val);
 556
 557         return count;
 558 }
 559
 560 PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
 561                         fsp_attr_show_vscroll, fsp_attr_set_vscroll);
 562
 563 static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
 564                                         void *data, char *buf)
 565 {
 566         struct fsp_data *pad = psmouse->private;
 567
 568         return sprintf(buf, "%d\n", pad->hscroll);
 569 }
 570
 571 static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
 572                                         const char *buf, size_t count)
 573 {
 574         unsigned int val;
 575         int err;
 576
 577         err = kstrtouint(buf, 10, &val);
 578         if (err)
 579                 return err;
 580
 581         if (val > 1)
 582                 return -EINVAL;
 583
 584         fsp_onpad_hscr(psmouse, val);
 585
 586         return count;
 587 }
 588
 589 PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
 590                         fsp_attr_show_hscroll, fsp_attr_set_hscroll);
 591
 592 static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
 593                                         void *data, char *buf)
 594 {
 595         struct fsp_data *pad = psmouse->private;
 596
 597         return sprintf(buf, "%c\n",
 598                         pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
 599 }
 600
 601 static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
 602                                         const char *buf, size_t count)
 603 {
 604         struct fsp_data *pad = psmouse->private;
 605         size_t i;
 606
 607         for (i = 0; i < count; i++) {
 608                 switch (buf[i]) {
 609                 case 'C':
 610                         pad->flags |= FSPDRV_FLAG_EN_OPC;
 611                         break;
 612                 case 'c':
 613                         pad->flags &= ~FSPDRV_FLAG_EN_OPC;
 614                         break;
 615                 default:
 616                         return -EINVAL;
 617                 }
 618         }
 619         return count;
 620 }
 621
 622 PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
 623                         fsp_attr_show_flags, fsp_attr_set_flags);
 624
 625 static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
 626                                         void *data, char *buf)
 627 {
 628         return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
 629 }
 630
 631 PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
 632
 633 static struct attribute *fsp_attributes[] = {
 634         &psmouse_attr_setreg.dattr.attr,
 635         &psmouse_attr_getreg.dattr.attr,
 636         &psmouse_attr_page.dattr.attr,
 637         &psmouse_attr_vscroll.dattr.attr,
 638         &psmouse_attr_hscroll.dattr.attr,
 639         &psmouse_attr_flags.dattr.attr,
 640         &psmouse_attr_ver.dattr.attr,
 641         NULL
 642 };
 643
 644 static struct attribute_group fsp_attribute_group = {
 645         .attrs = fsp_attributes,
 646 };
 647
 648 #ifdef  FSP_DEBUG
 649 static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
 650 {
 651         static unsigned int ps2_packet_cnt;
 652         static unsigned int ps2_last_second;
 653         unsigned int jiffies_msec;
 654         const char *packet_type = "UNKNOWN";
 655         unsigned short abs_x = 0, abs_y = 0;
 656
 657         /* Interpret & dump the packet data. */
 658         switch (packet[0] >> FSP_PKT_TYPE_SHIFT) {
 659         case FSP_PKT_TYPE_ABS:
 660                 packet_type = "Absolute";
 661                 abs_x = GET_ABS_X(packet);
 662                 abs_y = GET_ABS_Y(packet);
 663                 break;
 664         case FSP_PKT_TYPE_NORMAL:
 665                 packet_type = "Normal";
 666                 break;
 667         case FSP_PKT_TYPE_NOTIFY:
 668                 packet_type = "Notify";
 669                 break;
 670         case FSP_PKT_TYPE_NORMAL_OPC:
 671                 packet_type = "Normal-OPC";
 672                 break;
 673         }
 674
 675         ps2_packet_cnt++;
 676         jiffies_msec = jiffies_to_msecs(jiffies);
 677         psmouse_dbg(psmouse,
 678                     "%08dms %s packets: %02x, %02x, %02x, %02x; "
 679                     "abs_x: %d, abs_y: %d\n",
 680                     jiffies_msec, packet_type,
 681                     packet[0], packet[1], packet[2], packet[3], abs_x, abs_y);
 682
 683         if (jiffies_msec - ps2_last_second > 1000) {
 684                 psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
 685                 ps2_packet_cnt = 0;
 686                 ps2_last_second = jiffies_msec;
 687         }
 688 }
 689 #else
 690 static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
 691 {
 692 }
 693 #endif
 694
 695 static void fsp_set_slot(struct input_dev *dev, int slot, bool active,
 696                          unsigned int x, unsigned int y)
 697 {
 698         input_mt_slot(dev, slot);
 699         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 700         if (active) {
 701                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 702                 input_report_abs(dev, ABS_MT_POSITION_Y, y);
 703         }
 704 }
 705
 706 static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 707 {
 708         struct input_dev *dev = psmouse->dev;
 709         struct fsp_data *ad = psmouse->private;
 710         unsigned char *packet = psmouse->packet;
 711         unsigned char button_status = 0, lscroll = 0, rscroll = 0;
 712         unsigned short abs_x, abs_y, fgrs = 0;
 713
 714         if (psmouse->pktcnt < 4)
 715                 return PSMOUSE_GOOD_DATA;
 716
 717         /*
 718          * Full packet accumulated, process it
 719          */
 720
 721         fsp_packet_debug(psmouse, packet);
 722
 723         switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
 724         case FSP_PKT_TYPE_ABS:
 725
 726                 if ((packet[0] == 0x48 || packet[0] == 0x49) &&
 727                     packet[1] == 0 && packet[2] == 0) {
 728                         /*
 729                          * Ignore coordinate noise when finger leaving the
 730                          * surface, otherwise cursor may jump to upper-left
 731                          * corner.
 732                          */
 733                         packet[3] &= 0xf0;
 734                 }
 735
 736                 abs_x = GET_ABS_X(packet);
 737                 abs_y = GET_ABS_Y(packet);
 738
 739                 if (packet[0] & FSP_PB0_MFMC) {
 740                         /*
 741                          * MFMC packet: assume that there are two fingers on
 742                          * pad
 743                          */
 744                         fgrs = 2;
 745
 746                         /* MFMC packet */
 747                         if (packet[0] & FSP_PB0_MFMC_FGR2) {
 748                                 /* 2nd finger */
 749                                 if (ad->last_mt_fgr == 2) {
 750                                         /*
 751                                          * workaround for buggy firmware
 752                                          * which doesn't clear MFMC bit if
 753                                          * the 1st finger is up
 754                                          */
 755                                         fgrs = 1;
 756                                         fsp_set_slot(dev, 0, false, 0, 0);
 757                                 }
 758                                 ad->last_mt_fgr = 2;
 759
 760                                 fsp_set_slot(dev, 1, fgrs == 2, abs_x, abs_y);
 761                         } else {
 762                                 /* 1st finger */
 763                                 if (ad->last_mt_fgr == 1) {
 764                                         /*
 765                                          * workaround for buggy firmware
 766                                          * which doesn't clear MFMC bit if
 767                                          * the 2nd finger is up
 768                                          */
 769                                         fgrs = 1;
 770                                         fsp_set_slot(dev, 1, false, 0, 0);
 771                                 }
 772                                 ad->last_mt_fgr = 1;
 773                                 fsp_set_slot(dev, 0, fgrs != 0, abs_x, abs_y);
 774                         }
 775                 } else {
 776                         /* SFAC packet */
 777                         if ((packet[0] & (FSP_PB0_LBTN|FSP_PB0_PHY_BTN)) ==
 778                                 FSP_PB0_LBTN) {
 779                                 /* On-pad click in SFAC mode should be handled
 780                                  * by userspace.  On-pad clicks in MFMC mode
 781                                  * are real clickpad clicks, and not ignored.
 782                                  */
 783                                 packet[0] &= ~FSP_PB0_LBTN;
 784                         }
 785
 786                         /* no multi-finger information */
 787                         ad->last_mt_fgr = 0;
 788
 789                         if (abs_x != 0 && abs_y != 0)
 790                                 fgrs = 1;
 791
 792                         fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
 793                         fsp_set_slot(dev, 1, false, 0, 0);
 794                 }
 795                 if (fgrs == 1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
 796                         input_report_abs(dev, ABS_X, abs_x);
 797                         input_report_abs(dev, ABS_Y, abs_y);
 798                 }
 799                 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
 800                 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
 801                 input_report_key(dev, BTN_TOUCH, fgrs);
 802                 input_report_key(dev, BTN_TOOL_FINGER, fgrs == 1);
 803                 input_report_key(dev, BTN_TOOL_DOUBLETAP, fgrs == 2);
 804                 break;
 805
 806         case FSP_PKT_TYPE_NORMAL_OPC:
 807                 /* on-pad click, filter it if necessary */
 808                 if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
 809                         packet[0] &= ~FSP_PB0_LBTN;
 810                 /* fall through */
 811
 812         case FSP_PKT_TYPE_NORMAL:
 813                 /* normal packet */
 814                 /* special packet data translation from on-pad packets */
 815                 if (packet[3] != 0) {
 816                         if (packet[3] & BIT(0))
 817                                 button_status |= 0x01;  /* wheel down */
 818                         if (packet[3] & BIT(1))
 819                                 button_status |= 0x0f;  /* wheel up */
 820                         if (packet[3] & BIT(2))
 821                                 button_status |= BIT(4);/* horizontal left */
 822                         if (packet[3] & BIT(3))
 823                                 button_status |= BIT(5);/* horizontal right */
 824                         /* push back to packet queue */
 825                         if (button_status != 0)
 826                                 packet[3] = button_status;
 827                         rscroll = (packet[3] >> 4) & 1;
 828                         lscroll = (packet[3] >> 5) & 1;
 829                 }
 830                 /*
 831                  * Processing wheel up/down and extra button events
 832                  */
 833                 input_report_rel(dev, REL_WHEEL,
 834                                  (int)(packet[3] & 8) - (int)(packet[3] & 7));
 835                 input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
 836                 input_report_key(dev, BTN_BACK, lscroll);
 837                 input_report_key(dev, BTN_FORWARD, rscroll);
 838
 839                 /*
 840                  * Standard PS/2 Mouse
 841                  */
 842                 psmouse_report_standard_packet(dev, packet);
 843                 break;
 844         }
 845
 846         input_sync(dev);
 847
 848         return PSMOUSE_FULL_PACKET;
 849 }
 850
 851 static int fsp_activate_protocol(struct psmouse *psmouse)
 852 {
 853         struct fsp_data *pad = psmouse->private;
 854         struct ps2dev *ps2dev = &psmouse->ps2dev;
 855         unsigned char param[2];
 856         int val;
 857
 858         /*
 859          * Standard procedure to enter FSP Intellimouse mode
 860          * (scrolling wheel, 4th and 5th buttons)
 861          */
 862         param[0] = 200;
 863         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 864         param[0] = 200;
 865         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 866         param[0] =  80;
 867         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 868
 869         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 870         if (param[0] != 0x04) {
 871                 psmouse_err(psmouse,
 872                             "Unable to enable 4 bytes packet format.\n");
 873                 return -EIO;
 874         }
 875
 876         if (pad->ver < FSP_VER_STL3888_C0) {
 877                 /* Preparing relative coordinates output for older hardware */
 878                 if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
 879                         psmouse_err(psmouse,
 880                                     "Unable to read SYSCTL5 register.\n");
 881                         return -EIO;
 882                 }
 883
 884                 if (fsp_get_buttons(psmouse, &pad->buttons)) {
 885                         psmouse_err(psmouse,
 886                                     "Unable to retrieve number of buttons.\n");
 887                         return -EIO;
 888                 }
 889
 890                 val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
 891                 /* Ensure we are not in absolute mode */
 892                 val &= ~FSP_BIT_EN_PKT_G0;
 893                 if (pad->buttons == 0x06) {
 894                         /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 895                         val |= FSP_BIT_EN_MSID6;
 896                 }
 897
 898                 if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
 899                         psmouse_err(psmouse,
 900                                     "Unable to set up required mode bits.\n");
 901                         return -EIO;
 902                 }
 903
 904                 /*
 905                  * Enable OPC tags such that driver can tell the difference
 906                  * between on-pad and real button click
 907                  */
 908                 if (fsp_opc_tag_enable(psmouse, true))
 909                         psmouse_warn(psmouse,
 910                                      "Failed to enable OPC tag mode.\n");
 911                 /* enable on-pad click by default */
 912                 pad->flags |= FSPDRV_FLAG_EN_OPC;
 913
 914                 /* Enable on-pad vertical and horizontal scrolling */
 915                 fsp_onpad_vscr(psmouse, true);
 916                 fsp_onpad_hscr(psmouse, true);
 917         } else {
 918                 /* Enable absolute coordinates output for Cx/Dx hardware */
 919                 if (fsp_reg_write(psmouse, FSP_REG_SWC1,
 920                                   FSP_BIT_SWC1_EN_ABS_1F |
 921                                   FSP_BIT_SWC1_EN_ABS_2F |
 922                                   FSP_BIT_SWC1_EN_FUP_OUT |
 923                                   FSP_BIT_SWC1_EN_ABS_CON)) {
 924                         psmouse_err(psmouse,
 925                                     "Unable to enable absolute coordinates output.\n");
 926                         return -EIO;
 927                 }
 928         }
 929
 930         return 0;
 931 }
 932
 933 static int fsp_set_input_params(struct psmouse *psmouse)
 934 {
 935         struct input_dev *dev = psmouse->dev;
 936         struct fsp_data *pad = psmouse->private;
 937
 938         if (pad->ver < FSP_VER_STL3888_C0) {
 939                 __set_bit(BTN_MIDDLE, dev->keybit);
 940                 __set_bit(BTN_BACK, dev->keybit);
 941                 __set_bit(BTN_FORWARD, dev->keybit);
 942                 __set_bit(REL_WHEEL, dev->relbit);
 943                 __set_bit(REL_HWHEEL, dev->relbit);
 944         } else {
 945                 /*
 946                  * Hardware prior to Cx performs much better in relative mode;
 947                  * hence, only enable absolute coordinates output as well as
 948                  * multi-touch output for the newer hardware.
 949                  *
 950                  * Maximum coordinates can be computed as:
 951                  *
 952                  *      number of scanlines * 64 - 57
 953                  *
 954                  * where number of X/Y scanline lines are 16/12.
 955                  */
 956                 int abs_x = 967, abs_y = 711;
 957
 958                 __set_bit(EV_ABS, dev->evbit);
 959                 __clear_bit(EV_REL, dev->evbit);
 960                 __set_bit(BTN_TOUCH, dev->keybit);
 961                 __set_bit(BTN_TOOL_FINGER, dev->keybit);
 962                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 963                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 964
 965                 input_set_abs_params(dev, ABS_X, 0, abs_x, 0, 0);
 966                 input_set_abs_params(dev, ABS_Y, 0, abs_y, 0, 0);
 967                 input_mt_init_slots(dev, 2, 0);
 968                 input_set_abs_params(dev, ABS_MT_POSITION_X, 0, abs_x, 0, 0);
 969                 input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, abs_y, 0, 0);
 970         }
 971
 972         return 0;
 973 }
 974
 975 int fsp_detect(struct psmouse *psmouse, bool set_properties)
 976 {
 977         int id;
 978
 979         if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
 980                 return -EIO;
 981
 982         if (id != 0x01)
 983                 return -ENODEV;
 984
 985         if (set_properties) {
 986                 psmouse->vendor = "Sentelic";
 987                 psmouse->name = "FingerSensingPad";
 988         }
 989
 990         return 0;
 991 }
 992
 993 static void fsp_reset(struct psmouse *psmouse)
 994 {
 995         fsp_opc_tag_enable(psmouse, false);
 996         fsp_onpad_vscr(psmouse, false);
 997         fsp_onpad_hscr(psmouse, false);
 998 }
 999
1000 static void fsp_disconnect(struct psmouse *psmouse)
1001 {
1002         sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1003                            &fsp_attribute_group);
1004
1005         fsp_reset(psmouse);
1006         kfree(psmouse->private);
1007 }
1008
1009 static int fsp_reconnect(struct psmouse *psmouse)
1010 {
1011         int version;
1012
1013         if (fsp_detect(psmouse, 0))
1014                 return -ENODEV;
1015
1016         if (fsp_get_version(psmouse, &version))
1017                 return -ENODEV;
1018
1019         if (fsp_activate_protocol(psmouse))
1020                 return -EIO;
1021
1022         return 0;
1023 }
1024
1025 int fsp_init(struct psmouse *psmouse)
1026 {
1027         struct fsp_data *priv;
1028         int ver, rev, sn = 0;
1029         int error;
1030
1031         if (fsp_get_version(psmouse, &ver) ||
1032             fsp_get_revision(psmouse, &rev)) {
1033                 return -ENODEV;
1034         }
1035         if (ver >= FSP_VER_STL3888_C0) {
1036                 /* firmware information is only available since C0 */
1037                 fsp_get_sn(psmouse, &sn);
1038         }
1039
1040         psmouse_info(psmouse,
1041                      "Finger Sensing Pad, hw: %d.%d.%d, sn: %x, sw: %s\n",
1042                      ver >> 4, ver & 0x0F, rev, sn, fsp_drv_ver);
1043
1044         psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
1045         if (!priv)
1046                 return -ENOMEM;
1047
1048         priv->ver = ver;
1049         priv->rev = rev;
1050
1051         psmouse->protocol_handler = fsp_process_byte;
1052         psmouse->disconnect = fsp_disconnect;
1053         psmouse->reconnect = fsp_reconnect;
1054         psmouse->cleanup = fsp_reset;
1055         psmouse->pktsize = 4;
1056
1057         error = fsp_activate_protocol(psmouse);
1058         if (error)
1059                 goto err_out;
1060
1061         /* Set up various supported input event bits */
1062         error = fsp_set_input_params(psmouse);
1063         if (error)
1064                 goto err_out;
1065
1066         error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1067                                    &fsp_attribute_group);
1068         if (error) {
1069                 psmouse_err(psmouse,
1070                             "Failed to create sysfs attributes (%d)", error);
1071                 goto err_out;
1072         }
1073
1074         return 0;
1075
1076  err_out:
1077         kfree(psmouse->private);
1078         psmouse->private = NULL;
1079         return error;
1080 }