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         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 = kstrtoint(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         int reg, val, err;
 480
 481         err = kstrtoint(buf, 16, &reg);
 482         if (err)
 483                 return err;
 484
 485         if (reg > 0xff)
 486                 return -EINVAL;
 487
 488         if (fsp_reg_read(psmouse, reg, &val))
 489                 return -EIO;
 490
 491         pad->last_reg = reg;
 492         pad->last_val = val;
 493
 494         return count;
 495 }
 496
 497 PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
 498                         fsp_attr_show_getreg, fsp_attr_set_getreg);
 499
 500 static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
 501                                         void *data, char *buf)
 502 {
 503         int val = 0;
 504
 505         if (fsp_page_reg_read(psmouse, &val))
 506                 return -EIO;
 507
 508         return sprintf(buf, "%02x\n", val);
 509 }
 510
 511 static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
 512                                         const char *buf, size_t count)
 513 {
 514         int val, err;
 515
 516         err = kstrtoint(buf, 16, &val);
 517         if (err)
 518                 return err;
 519
 520         if (val > 0xff)
 521                 return -EINVAL;
 522
 523         if (fsp_page_reg_write(psmouse, val))
 524                 return -EIO;
 525
 526         return count;
 527 }
 528
 529 PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
 530                         fsp_attr_show_pagereg, fsp_attr_set_pagereg);
 531
 532 static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
 533                                         void *data, char *buf)
 534 {
 535         struct fsp_data *pad = psmouse->private;
 536
 537         return sprintf(buf, "%d\n", pad->vscroll);
 538 }
 539
 540 static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
 541                                         const char *buf, size_t count)
 542 {
 543         unsigned int val;
 544         int err;
 545
 546         err = kstrtouint(buf, 10, &val);
 547         if (err)
 548                 return err;
 549
 550         if (val > 1)
 551                 return -EINVAL;
 552
 553         fsp_onpad_vscr(psmouse, val);
 554
 555         return count;
 556 }
 557
 558 PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
 559                         fsp_attr_show_vscroll, fsp_attr_set_vscroll);
 560
 561 static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
 562                                         void *data, char *buf)
 563 {
 564         struct fsp_data *pad = psmouse->private;
 565
 566         return sprintf(buf, "%d\n", pad->hscroll);
 567 }
 568
 569 static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
 570                                         const char *buf, size_t count)
 571 {
 572         unsigned int val;
 573         int err;
 574
 575         err = kstrtouint(buf, 10, &val);
 576         if (err)
 577                 return err;
 578
 579         if (val > 1)
 580                 return -EINVAL;
 581
 582         fsp_onpad_hscr(psmouse, val);
 583
 584         return count;
 585 }
 586
 587 PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
 588                         fsp_attr_show_hscroll, fsp_attr_set_hscroll);
 589
 590 static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
 591                                         void *data, char *buf)
 592 {
 593         struct fsp_data *pad = psmouse->private;
 594
 595         return sprintf(buf, "%c\n",
 596                         pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
 597 }
 598
 599 static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
 600                                         const char *buf, size_t count)
 601 {
 602         struct fsp_data *pad = psmouse->private;
 603         size_t i;
 604
 605         for (i = 0; i < count; i++) {
 606                 switch (buf[i]) {
 607                 case 'C':
 608                         pad->flags |= FSPDRV_FLAG_EN_OPC;
 609                         break;
 610                 case 'c':
 611                         pad->flags &= ~FSPDRV_FLAG_EN_OPC;
 612                         break;
 613                 default:
 614                         return -EINVAL;
 615                 }
 616         }
 617         return count;
 618 }
 619
 620 PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
 621                         fsp_attr_show_flags, fsp_attr_set_flags);
 622
 623 static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
 624                                         void *data, char *buf)
 625 {
 626         return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
 627 }
 628
 629 PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
 630
 631 static struct attribute *fsp_attributes[] = {
 632         &psmouse_attr_setreg.dattr.attr,
 633         &psmouse_attr_getreg.dattr.attr,
 634         &psmouse_attr_page.dattr.attr,
 635         &psmouse_attr_vscroll.dattr.attr,
 636         &psmouse_attr_hscroll.dattr.attr,
 637         &psmouse_attr_flags.dattr.attr,
 638         &psmouse_attr_ver.dattr.attr,
 639         NULL
 640 };
 641
 642 static struct attribute_group fsp_attribute_group = {
 643         .attrs = fsp_attributes,
 644 };
 645
 646 #ifdef  FSP_DEBUG
 647 static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
 648 {
 649         static unsigned int ps2_packet_cnt;
 650         static unsigned int ps2_last_second;
 651         unsigned int jiffies_msec;
 652         const char *packet_type = "UNKNOWN";
 653         unsigned short abs_x = 0, abs_y = 0;
 654
 655         /* Interpret & dump the packet data. */
 656         switch (packet[0] >> FSP_PKT_TYPE_SHIFT) {
 657         case FSP_PKT_TYPE_ABS:
 658                 packet_type = "Absolute";
 659                 abs_x = GET_ABS_X(packet);
 660                 abs_y = GET_ABS_Y(packet);
 661                 break;
 662         case FSP_PKT_TYPE_NORMAL:
 663                 packet_type = "Normal";
 664                 break;
 665         case FSP_PKT_TYPE_NOTIFY:
 666                 packet_type = "Notify";
 667                 break;
 668         case FSP_PKT_TYPE_NORMAL_OPC:
 669                 packet_type = "Normal-OPC";
 670                 break;
 671         }
 672
 673         ps2_packet_cnt++;
 674         jiffies_msec = jiffies_to_msecs(jiffies);
 675         psmouse_dbg(psmouse,
 676                     "%08dms %s packets: %02x, %02x, %02x, %02x; "
 677                     "abs_x: %d, abs_y: %d\n",
 678                     jiffies_msec, packet_type,
 679                     packet[0], packet[1], packet[2], packet[3], abs_x, abs_y);
 680
 681         if (jiffies_msec - ps2_last_second > 1000) {
 682                 psmouse_dbg(psmouse, "PS/2 packets/sec = %d\n", ps2_packet_cnt);
 683                 ps2_packet_cnt = 0;
 684                 ps2_last_second = jiffies_msec;
 685         }
 686 }
 687 #else
 688 static void fsp_packet_debug(struct psmouse *psmouse, unsigned char packet[])
 689 {
 690 }
 691 #endif
 692
 693 static void fsp_set_slot(struct input_dev *dev, int slot, bool active,
 694                          unsigned int x, unsigned int y)
 695 {
 696         input_mt_slot(dev, slot);
 697         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 698         if (active) {
 699                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 700                 input_report_abs(dev, ABS_MT_POSITION_Y, y);
 701         }
 702 }
 703
 704 static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 705 {
 706         struct input_dev *dev = psmouse->dev;
 707         struct fsp_data *ad = psmouse->private;
 708         unsigned char *packet = psmouse->packet;
 709         unsigned char button_status = 0, lscroll = 0, rscroll = 0;
 710         unsigned short abs_x, abs_y, fgrs = 0;
 711         int rel_x, rel_y;
 712
 713         if (psmouse->pktcnt < 4)
 714                 return PSMOUSE_GOOD_DATA;
 715
 716         /*
 717          * Full packet accumulated, process it
 718          */
 719
 720         fsp_packet_debug(psmouse, packet);
 721
 722         switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
 723         case FSP_PKT_TYPE_ABS:
 724
 725                 if ((packet[0] == 0x48 || packet[0] == 0x49) &&
 726                     packet[1] == 0 && packet[2] == 0) {
 727                         /*
 728                          * Ignore coordinate noise when finger leaving the
 729                          * surface, otherwise cursor may jump to upper-left
 730                          * corner.
 731                          */
 732                         packet[3] &= 0xf0;
 733                 }
 734
 735                 abs_x = GET_ABS_X(packet);
 736                 abs_y = GET_ABS_Y(packet);
 737
 738                 if (packet[0] & FSP_PB0_MFMC) {
 739                         /*
 740                          * MFMC packet: assume that there are two fingers on
 741                          * pad
 742                          */
 743                         fgrs = 2;
 744
 745                         /* MFMC packet */
 746                         if (packet[0] & FSP_PB0_MFMC_FGR2) {
 747                                 /* 2nd finger */
 748                                 if (ad->last_mt_fgr == 2) {
 749                                         /*
 750                                          * workaround for buggy firmware
 751                                          * which doesn't clear MFMC bit if
 752                                          * the 1st finger is up
 753                                          */
 754                                         fgrs = 1;
 755                                         fsp_set_slot(dev, 0, false, 0, 0);
 756                                 }
 757                                 ad->last_mt_fgr = 2;
 758
 759                                 fsp_set_slot(dev, 1, fgrs == 2, abs_x, abs_y);
 760                         } else {
 761                                 /* 1st finger */
 762                                 if (ad->last_mt_fgr == 1) {
 763                                         /*
 764                                          * workaround for buggy firmware
 765                                          * which doesn't clear MFMC bit if
 766                                          * the 2nd finger is up
 767                                          */
 768                                         fgrs = 1;
 769                                         fsp_set_slot(dev, 1, false, 0, 0);
 770                                 }
 771                                 ad->last_mt_fgr = 1;
 772                                 fsp_set_slot(dev, 0, fgrs != 0, abs_x, abs_y);
 773                         }
 774                 } else {
 775                         /* SFAC packet */
 776                         if ((packet[0] & (FSP_PB0_LBTN|FSP_PB0_PHY_BTN)) ==
 777                                 FSP_PB0_LBTN) {
 778                                 /* On-pad click in SFAC mode should be handled
 779                                  * by userspace.  On-pad clicks in MFMC mode
 780                                  * are real clickpad clicks, and not ignored.
 781                                  */
 782                                 packet[0] &= ~FSP_PB0_LBTN;
 783                         }
 784
 785                         /* no multi-finger information */
 786                         ad->last_mt_fgr = 0;
 787
 788                         if (abs_x != 0 && abs_y != 0)
 789                                 fgrs = 1;
 790
 791                         fsp_set_slot(dev, 0, fgrs > 0, abs_x, abs_y);
 792                         fsp_set_slot(dev, 1, false, 0, 0);
 793                 }
 794                 if (fgrs == 1 || (fgrs == 2 && !(packet[0] & FSP_PB0_MFMC_FGR2))) {
 795                         input_report_abs(dev, ABS_X, abs_x);
 796                         input_report_abs(dev, ABS_Y, abs_y);
 797                 }
 798                 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
 799                 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
 800                 input_report_key(dev, BTN_TOUCH, fgrs);
 801                 input_report_key(dev, BTN_TOOL_FINGER, fgrs == 1);
 802                 input_report_key(dev, BTN_TOOL_DOUBLETAP, fgrs == 2);
 803                 break;
 804
 805         case FSP_PKT_TYPE_NORMAL_OPC:
 806                 /* on-pad click, filter it if necessary */
 807                 if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
 808                         packet[0] &= ~FSP_PB0_LBTN;
 809                 /* fall through */
 810
 811         case FSP_PKT_TYPE_NORMAL:
 812                 /* normal packet */
 813                 /* special packet data translation from on-pad packets */
 814                 if (packet[3] != 0) {
 815                         if (packet[3] & BIT(0))
 816                                 button_status |= 0x01;  /* wheel down */
 817                         if (packet[3] & BIT(1))
 818                                 button_status |= 0x0f;  /* wheel up */
 819                         if (packet[3] & BIT(2))
 820                                 button_status |= BIT(4);/* horizontal left */
 821                         if (packet[3] & BIT(3))
 822                                 button_status |= BIT(5);/* horizontal right */
 823                         /* push back to packet queue */
 824                         if (button_status != 0)
 825                                 packet[3] = button_status;
 826                         rscroll = (packet[3] >> 4) & 1;
 827                         lscroll = (packet[3] >> 5) & 1;
 828                 }
 829                 /*
 830                  * Processing wheel up/down and extra button events
 831                  */
 832                 input_report_rel(dev, REL_WHEEL,
 833                                  (int)(packet[3] & 8) - (int)(packet[3] & 7));
 834                 input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
 835                 input_report_key(dev, BTN_BACK, lscroll);
 836                 input_report_key(dev, BTN_FORWARD, rscroll);
 837
 838                 /*
 839                  * Standard PS/2 Mouse
 840                  */
 841                 input_report_key(dev, BTN_LEFT, packet[0] & 1);
 842                 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 843                 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
 844
 845                 rel_x = packet[1] ? (int)packet[1] - (int)((packet[0] << 4) & 0x100) : 0;
 846                 rel_y = packet[2] ? (int)((packet[0] << 3) & 0x100) - (int)packet[2] : 0;
 847
 848                 input_report_rel(dev, REL_X, rel_x);
 849                 input_report_rel(dev, REL_Y, rel_y);
 850                 break;
 851         }
 852
 853         input_sync(dev);
 854
 855         return PSMOUSE_FULL_PACKET;
 856 }
 857
 858 static int fsp_activate_protocol(struct psmouse *psmouse)
 859 {
 860         struct fsp_data *pad = psmouse->private;
 861         struct ps2dev *ps2dev = &psmouse->ps2dev;
 862         unsigned char param[2];
 863         int val;
 864
 865         /*
 866          * Standard procedure to enter FSP Intellimouse mode
 867          * (scrolling wheel, 4th and 5th buttons)
 868          */
 869         param[0] = 200;
 870         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 871         param[0] = 200;
 872         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 873         param[0] =  80;
 874         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 875
 876         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 877         if (param[0] != 0x04) {
 878                 psmouse_err(psmouse,
 879                             "Unable to enable 4 bytes packet format.\n");
 880                 return -EIO;
 881         }
 882
 883         if (pad->ver < FSP_VER_STL3888_C0) {
 884                 /* Preparing relative coordinates output for older hardware */
 885                 if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
 886                         psmouse_err(psmouse,
 887                                     "Unable to read SYSCTL5 register.\n");
 888                         return -EIO;
 889                 }
 890
 891                 if (fsp_get_buttons(psmouse, &pad->buttons)) {
 892                         psmouse_err(psmouse,
 893                                     "Unable to retrieve number of buttons.\n");
 894                         return -EIO;
 895                 }
 896
 897                 val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
 898                 /* Ensure we are not in absolute mode */
 899                 val &= ~FSP_BIT_EN_PKT_G0;
 900                 if (pad->buttons == 0x06) {
 901                         /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 902                         val |= FSP_BIT_EN_MSID6;
 903                 }
 904
 905                 if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
 906                         psmouse_err(psmouse,
 907                                     "Unable to set up required mode bits.\n");
 908                         return -EIO;
 909                 }
 910
 911                 /*
 912                  * Enable OPC tags such that driver can tell the difference
 913                  * between on-pad and real button click
 914                  */
 915                 if (fsp_opc_tag_enable(psmouse, true))
 916                         psmouse_warn(psmouse,
 917                                      "Failed to enable OPC tag mode.\n");
 918                 /* enable on-pad click by default */
 919                 pad->flags |= FSPDRV_FLAG_EN_OPC;
 920
 921                 /* Enable on-pad vertical and horizontal scrolling */
 922                 fsp_onpad_vscr(psmouse, true);
 923                 fsp_onpad_hscr(psmouse, true);
 924         } else {
 925                 /* Enable absolute coordinates output for Cx/Dx hardware */
 926                 if (fsp_reg_write(psmouse, FSP_REG_SWC1,
 927                                   FSP_BIT_SWC1_EN_ABS_1F |
 928                                   FSP_BIT_SWC1_EN_ABS_2F |
 929                                   FSP_BIT_SWC1_EN_FUP_OUT |
 930                                   FSP_BIT_SWC1_EN_ABS_CON)) {
 931                         psmouse_err(psmouse,
 932                                     "Unable to enable absolute coordinates output.\n");
 933                         return -EIO;
 934                 }
 935         }
 936
 937         return 0;
 938 }
 939
 940 static int fsp_set_input_params(struct psmouse *psmouse)
 941 {
 942         struct input_dev *dev = psmouse->dev;
 943         struct fsp_data *pad = psmouse->private;
 944
 945         if (pad->ver < FSP_VER_STL3888_C0) {
 946                 __set_bit(BTN_MIDDLE, dev->keybit);
 947                 __set_bit(BTN_BACK, dev->keybit);
 948                 __set_bit(BTN_FORWARD, dev->keybit);
 949                 __set_bit(REL_WHEEL, dev->relbit);
 950                 __set_bit(REL_HWHEEL, dev->relbit);
 951         } else {
 952                 /*
 953                  * Hardware prior to Cx performs much better in relative mode;
 954                  * hence, only enable absolute coordinates output as well as
 955                  * multi-touch output for the newer hardware.
 956                  *
 957                  * Maximum coordinates can be computed as:
 958                  *
 959                  *      number of scanlines * 64 - 57
 960                  *
 961                  * where number of X/Y scanline lines are 16/12.
 962                  */
 963                 int abs_x = 967, abs_y = 711;
 964
 965                 __set_bit(EV_ABS, dev->evbit);
 966                 __clear_bit(EV_REL, dev->evbit);
 967                 __set_bit(BTN_TOUCH, dev->keybit);
 968                 __set_bit(BTN_TOOL_FINGER, dev->keybit);
 969                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 970                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 971
 972                 input_set_abs_params(dev, ABS_X, 0, abs_x, 0, 0);
 973                 input_set_abs_params(dev, ABS_Y, 0, abs_y, 0, 0);
 974                 input_mt_init_slots(dev, 2, 0);
 975                 input_set_abs_params(dev, ABS_MT_POSITION_X, 0, abs_x, 0, 0);
 976                 input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, abs_y, 0, 0);
 977         }
 978
 979         return 0;
 980 }
 981
 982 int fsp_detect(struct psmouse *psmouse, bool set_properties)
 983 {
 984         int id;
 985
 986         if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
 987                 return -EIO;
 988
 989         if (id != 0x01)
 990                 return -ENODEV;
 991
 992         if (set_properties) {
 993                 psmouse->vendor = "Sentelic";
 994                 psmouse->name = "FingerSensingPad";
 995         }
 996
 997         return 0;
 998 }
 999
1000 static void fsp_reset(struct psmouse *psmouse)
1001 {
1002         fsp_opc_tag_enable(psmouse, false);
1003         fsp_onpad_vscr(psmouse, false);
1004         fsp_onpad_hscr(psmouse, false);
1005 }
1006
1007 static void fsp_disconnect(struct psmouse *psmouse)
1008 {
1009         sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
1010                            &fsp_attribute_group);
1011
1012         fsp_reset(psmouse);
1013         kfree(psmouse->private);
1014 }
1015
1016 static int fsp_reconnect(struct psmouse *psmouse)
1017 {
1018         int version;
1019
1020         if (fsp_detect(psmouse, 0))
1021                 return -ENODEV;
1022
1023         if (fsp_get_version(psmouse, &version))
1024                 return -ENODEV;
1025
1026         if (fsp_activate_protocol(psmouse))
1027                 return -EIO;
1028
1029         return 0;
1030 }
1031
1032 int fsp_init(struct psmouse *psmouse)
1033 {
1034         struct fsp_data *priv;
1035         int ver, rev, sn = 0;
1036         int error;
1037
1038         if (fsp_get_version(psmouse, &ver) ||
1039             fsp_get_revision(psmouse, &rev)) {
1040                 return -ENODEV;
1041         }
1042         if (ver >= FSP_VER_STL3888_C0) {
1043                 /* firmware information is only available since C0 */
1044                 fsp_get_sn(psmouse, &sn);
1045         }
1046
1047         psmouse_info(psmouse,
1048                      "Finger Sensing Pad, hw: %d.%d.%d, sn: %x, sw: %s\n",
1049                      ver >> 4, ver & 0x0F, rev, sn, fsp_drv_ver);
1050
1051         psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
1052         if (!priv)
1053                 return -ENOMEM;
1054
1055         priv->ver = ver;
1056         priv->rev = rev;
1057
1058         psmouse->protocol_handler = fsp_process_byte;
1059         psmouse->disconnect = fsp_disconnect;
1060         psmouse->reconnect = fsp_reconnect;
1061         psmouse->cleanup = fsp_reset;
1062         psmouse->pktsize = 4;
1063
1064         error = fsp_activate_protocol(psmouse);
1065         if (error)
1066                 goto err_out;
1067
1068         /* Set up various supported input event bits */
1069         error = fsp_set_input_params(psmouse);
1070         if (error)
1071                 goto err_out;
1072
1073         error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
1074                                    &fsp_attribute_group);
1075         if (error) {
1076                 psmouse_err(psmouse,
1077                             "Failed to create sysfs attributes (%d)", error);
1078                 goto err_out;
1079         }
1080
1081         return 0;
1082
1083  err_out:
1084         kfree(psmouse->private);
1085         psmouse->private = NULL;
1086         return error;
1087 }