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) 2005-2010 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/version.h>
  24 #include <linux/input.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 /** Driver version. */
  41 static const char fsp_drv_ver[] = "1.0.0-K";
  42
  43 /*
  44  * Make sure that the value being sent to FSP will not conflict with
  45  * possible sample rate values.
  46  */
  47 static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
  48 {
  49         switch (reg_val) {
  50         case 10: case 20: case 40: case 60: case 80: case 100: case 200:
  51                 /*
  52                  * The requested value being sent to FSP matched to possible
  53                  * sample rates, swap the given value such that the hardware
  54                  * wouldn't get confused.
  55                  */
  56                 return (reg_val >> 4) | (reg_val << 4);
  57         default:
  58                 return reg_val; /* swap isn't necessary */
  59         }
  60 }
  61
  62 /*
  63  * Make sure that the value being sent to FSP will not conflict with certain
  64  * commands.
  65  */
  66 static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
  67 {
  68         switch (reg_val) {
  69         case 0xe9: case 0xee: case 0xf2: case 0xff:
  70                 /*
  71                  * The requested value being sent to FSP matched to certain
  72                  * commands, inverse the given value such that the hardware
  73                  * wouldn't get confused.
  74                  */
  75                 return ~reg_val;
  76         default:
  77                 return reg_val; /* inversion isn't necessary */
  78         }
  79 }
  80
  81 static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
  82 {
  83         struct ps2dev *ps2dev = &psmouse->ps2dev;
  84         unsigned char param[3];
  85         unsigned char addr;
  86         int rc = -1;
  87
  88         /*
  89          * We need to shut off the device and switch it into command
  90          * mode so we don't confuse our protocol handler. We don't need
  91          * to do that for writes because sysfs set helper does this for
  92          * us.
  93          */
  94         ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
  95         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  96
  97         ps2_begin_command(ps2dev);
  98
  99         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 100                 goto out;
 101
 102         /* should return 0xfe(request for resending) */
 103         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 104         /* should return 0xfc(failed) */
 105         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 106
 107         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 108                 goto out;
 109
 110         if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 111                 ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
 112         } else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 113                 /* swapping is required */
 114                 ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
 115                 /* expect 0xfe */
 116         } else {
 117                 /* swapping isn't necessary */
 118                 ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 119                 /* expect 0xfe */
 120         }
 121         /* should return 0xfc(failed) */
 122         ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
 123
 124         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
 125                 goto out;
 126
 127         *reg_val = param[2];
 128         rc = 0;
 129
 130  out:
 131         ps2_end_command(ps2dev);
 132         ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 133         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 134         dev_dbg(&ps2dev->serio->dev, "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
 135                 reg_addr, *reg_val, rc);
 136         return rc;
 137 }
 138
 139 static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
 140 {
 141         struct ps2dev *ps2dev = &psmouse->ps2dev;
 142         unsigned char v;
 143         int rc = -1;
 144
 145         ps2_begin_command(ps2dev);
 146
 147         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 148                 goto out;
 149
 150         if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 151                 /* inversion is required */
 152                 ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
 153         } else {
 154                 if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 155                         /* swapping is required */
 156                         ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
 157                 } else {
 158                         /* swapping isn't necessary */
 159                         ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
 160                 }
 161         }
 162         /* write the register address in correct order */
 163         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 164
 165         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 166                 return -1;
 167
 168         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 169                 /* inversion is required */
 170                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 171         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 172                 /* swapping is required */
 173                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 174         } else {
 175                 /* swapping isn't necessary */
 176                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 177         }
 178
 179         /* write the register value in correct order */
 180         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 181         rc = 0;
 182
 183  out:
 184         ps2_end_command(ps2dev);
 185         dev_dbg(&ps2dev->serio->dev, "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
 186                 reg_addr, reg_val, rc);
 187         return rc;
 188 }
 189
 190 /* Enable register clock gating for writing certain registers */
 191 static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
 192 {
 193         int v, nv;
 194
 195         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
 196                 return -1;
 197
 198         if (enable)
 199                 nv = v | FSP_BIT_EN_REG_CLK;
 200         else
 201                 nv = v & ~FSP_BIT_EN_REG_CLK;
 202
 203         /* only write if necessary */
 204         if (nv != v)
 205                 if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
 206                         return -1;
 207
 208         return 0;
 209 }
 210
 211 static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
 212 {
 213         struct ps2dev *ps2dev = &psmouse->ps2dev;
 214         unsigned char param[3];
 215         int rc = -1;
 216
 217         ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
 218         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 219
 220         ps2_begin_command(ps2dev);
 221
 222         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 223                 goto out;
 224
 225         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 226         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 227
 228         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 229                 goto out;
 230
 231         ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
 232         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 233
 234         /* get the returned result */
 235         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 236                 goto out;
 237
 238         *reg_val = param[2];
 239         rc = 0;
 240
 241  out:
 242         ps2_end_command(ps2dev);
 243         ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 244         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 245         dev_dbg(&ps2dev->serio->dev, "READ PAGE REG: 0x%02x (rc = %d)\n",
 246                 *reg_val, rc);
 247         return rc;
 248 }
 249
 250 static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
 251 {
 252         struct ps2dev *ps2dev = &psmouse->ps2dev;
 253         unsigned char v;
 254         int rc = -1;
 255
 256         ps2_begin_command(ps2dev);
 257
 258         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 259                 goto out;
 260
 261         ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
 262         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 263
 264         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 265                 return -1;
 266
 267         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 268                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 269         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 270                 /* swapping is required */
 271                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 272         } else {
 273                 /* swapping isn't necessary */
 274                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 275         }
 276
 277         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 278         rc = 0;
 279
 280  out:
 281         ps2_end_command(ps2dev);
 282         dev_dbg(&ps2dev->serio->dev, "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
 283                 reg_val, rc);
 284         return rc;
 285 }
 286
 287 static int fsp_get_version(struct psmouse *psmouse, int *version)
 288 {
 289         if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
 290                 return -EIO;
 291
 292         return 0;
 293 }
 294
 295 static int fsp_get_revision(struct psmouse *psmouse, int *rev)
 296 {
 297         if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
 298                 return -EIO;
 299
 300         return 0;
 301 }
 302
 303 static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
 304 {
 305         static const int buttons[] = {
 306                 0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
 307                 0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 308                 0x04, /* Left/Middle/Right & Scroll Up/Down */
 309                 0x02, /* Left/Middle/Right */
 310         };
 311         int val;
 312
 313         if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS1, &val) == -1)
 314                 return -EIO;
 315
 316         *btn = buttons[(val & 0x30) >> 4];
 317         return 0;
 318 }
 319
 320 /* Enable on-pad command tag output */
 321 static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
 322 {
 323         int v, nv;
 324         int res = 0;
 325
 326         if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
 327                 dev_err(&psmouse->ps2dev.serio->dev, "Unable get OPC state.\n");
 328                 return -EIO;
 329         }
 330
 331         if (enable)
 332                 nv = v | FSP_BIT_EN_OPC_TAG;
 333         else
 334                 nv = v & ~FSP_BIT_EN_OPC_TAG;
 335
 336         /* only write if necessary */
 337         if (nv != v) {
 338                 fsp_reg_write_enable(psmouse, true);
 339                 res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
 340                 fsp_reg_write_enable(psmouse, false);
 341         }
 342
 343         if (res != 0) {
 344                 dev_err(&psmouse->ps2dev.serio->dev,
 345                         "Unable to enable OPC tag.\n");
 346                 res = -EIO;
 347         }
 348
 349         return res;
 350 }
 351
 352 static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
 353 {
 354         struct fsp_data *pad = psmouse->private;
 355         int val;
 356
 357         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 358                 return -EIO;
 359
 360         pad->vscroll = enable;
 361
 362         if (enable)
 363                 val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
 364         else
 365                 val &= ~FSP_BIT_FIX_VSCR;
 366
 367         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 368                 return -EIO;
 369
 370         return 0;
 371 }
 372
 373 static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
 374 {
 375         struct fsp_data *pad = psmouse->private;
 376         int val, v2;
 377
 378         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 379                 return -EIO;
 380
 381         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
 382                 return -EIO;
 383
 384         pad->hscroll = enable;
 385
 386         if (enable) {
 387                 val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
 388                 v2 |= FSP_BIT_EN_MSID6;
 389         } else {
 390                 val &= ~FSP_BIT_FIX_HSCR;
 391                 v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
 392         }
 393
 394         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 395                 return -EIO;
 396
 397         /* reconfigure horizontal scrolling packet output */
 398         if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
 399                 return -EIO;
 400
 401         return 0;
 402 }
 403
 404 /*
 405  * Write device specific initial parameters.
 406  *
 407  * ex: 0xab 0xcd - write oxcd into register 0xab
 408  */
 409 static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
 410                                    const char *buf, size_t count)
 411 {
 412         unsigned long reg, val;
 413         char *rest;
 414         ssize_t retval;
 415
 416         reg = simple_strtoul(buf, &rest, 16);
 417         if (rest == buf || *rest != ' ' || reg > 0xff)
 418                 return -EINVAL;
 419
 420         if (strict_strtoul(rest + 1, 16, &val) || val > 0xff)
 421                 return -EINVAL;
 422
 423         if (fsp_reg_write_enable(psmouse, true))
 424                 return -EIO;
 425
 426         retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
 427
 428         fsp_reg_write_enable(psmouse, false);
 429
 430         return count;
 431 }
 432
 433 PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
 434
 435 static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
 436                                         void *data, char *buf)
 437 {
 438         struct fsp_data *pad = psmouse->private;
 439
 440         return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
 441 }
 442
 443 /*
 444  * Read a register from device.
 445  *
 446  * ex: 0xab -- read content from register 0xab
 447  */
 448 static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
 449                                         const char *buf, size_t count)
 450 {
 451         struct fsp_data *pad = psmouse->private;
 452         unsigned long reg;
 453         int val;
 454
 455         if (strict_strtoul(buf, 16, &reg) || reg > 0xff)
 456                 return -EINVAL;
 457
 458         if (fsp_reg_read(psmouse, reg, &val))
 459                 return -EIO;
 460
 461         pad->last_reg = reg;
 462         pad->last_val = val;
 463
 464         return count;
 465 }
 466
 467 PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
 468                         fsp_attr_show_getreg, fsp_attr_set_getreg);
 469
 470 static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
 471                                         void *data, char *buf)
 472 {
 473         int val = 0;
 474
 475         if (fsp_page_reg_read(psmouse, &val))
 476                 return -EIO;
 477
 478         return sprintf(buf, "%02x\n", val);
 479 }
 480
 481 static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
 482                                         const char *buf, size_t count)
 483 {
 484         unsigned long val;
 485
 486         if (strict_strtoul(buf, 16, &val) || val > 0xff)
 487                 return -EINVAL;
 488
 489         if (fsp_page_reg_write(psmouse, val))
 490                 return -EIO;
 491
 492         return count;
 493 }
 494
 495 PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
 496                         fsp_attr_show_pagereg, fsp_attr_set_pagereg);
 497
 498 static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
 499                                         void *data, char *buf)
 500 {
 501         struct fsp_data *pad = psmouse->private;
 502
 503         return sprintf(buf, "%d\n", pad->vscroll);
 504 }
 505
 506 static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
 507                                         const char *buf, size_t count)
 508 {
 509         unsigned long val;
 510
 511         if (strict_strtoul(buf, 10, &val) || val > 1)
 512                 return -EINVAL;
 513
 514         fsp_onpad_vscr(psmouse, val);
 515
 516         return count;
 517 }
 518
 519 PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
 520                         fsp_attr_show_vscroll, fsp_attr_set_vscroll);
 521
 522 static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
 523                                         void *data, char *buf)
 524 {
 525         struct fsp_data *pad = psmouse->private;
 526
 527         return sprintf(buf, "%d\n", pad->hscroll);
 528 }
 529
 530 static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
 531                                         const char *buf, size_t count)
 532 {
 533         unsigned long val;
 534
 535         if (strict_strtoul(buf, 10, &val) || val > 1)
 536                 return -EINVAL;
 537
 538         fsp_onpad_hscr(psmouse, val);
 539
 540         return count;
 541 }
 542
 543 PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
 544                         fsp_attr_show_hscroll, fsp_attr_set_hscroll);
 545
 546 static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
 547                                         void *data, char *buf)
 548 {
 549         struct fsp_data *pad = psmouse->private;
 550
 551         return sprintf(buf, "%c\n",
 552                         pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
 553 }
 554
 555 static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
 556                                         const char *buf, size_t count)
 557 {
 558         struct fsp_data *pad = psmouse->private;
 559         size_t i;
 560
 561         for (i = 0; i < count; i++) {
 562                 switch (buf[i]) {
 563                 case 'C':
 564                         pad->flags |= FSPDRV_FLAG_EN_OPC;
 565                         break;
 566                 case 'c':
 567                         pad->flags &= ~FSPDRV_FLAG_EN_OPC;
 568                         break;
 569                 default:
 570                         return -EINVAL;
 571                 }
 572         }
 573         return count;
 574 }
 575
 576 PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
 577                         fsp_attr_show_flags, fsp_attr_set_flags);
 578
 579 static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
 580                                         void *data, char *buf)
 581 {
 582         return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
 583 }
 584
 585 PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
 586
 587 static struct attribute *fsp_attributes[] = {
 588         &psmouse_attr_setreg.dattr.attr,
 589         &psmouse_attr_getreg.dattr.attr,
 590         &psmouse_attr_page.dattr.attr,
 591         &psmouse_attr_vscroll.dattr.attr,
 592         &psmouse_attr_hscroll.dattr.attr,
 593         &psmouse_attr_flags.dattr.attr,
 594         &psmouse_attr_ver.dattr.attr,
 595         NULL
 596 };
 597
 598 static struct attribute_group fsp_attribute_group = {
 599         .attrs = fsp_attributes,
 600 };
 601
 602 #ifdef FSP_DEBUG
 603 static void fsp_packet_debug(unsigned char packet[])
 604 {
 605         static unsigned int ps2_packet_cnt;
 606         static unsigned int ps2_last_second;
 607         unsigned int jiffies_msec;
 608
 609         ps2_packet_cnt++;
 610         jiffies_msec = jiffies_to_msecs(jiffies);
 611         printk(KERN_DEBUG "%08dms PS/2 packets: %02x, %02x, %02x, %02x\n",
 612                 jiffies_msec, packet[0], packet[1], packet[2], packet[3]);
 613
 614         if (jiffies_msec - ps2_last_second > 1000) {
 615                 printk(KERN_DEBUG "PS/2 packets/sec = %d\n", ps2_packet_cnt);
 616                 ps2_packet_cnt = 0;
 617                 ps2_last_second = jiffies_msec;
 618         }
 619 }
 620 #else
 621 static void fsp_packet_debug(unsigned char packet[])
 622 {
 623 }
 624 #endif
 625
 626 static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 627 {
 628         struct input_dev *dev = psmouse->dev;
 629         struct fsp_data *ad = psmouse->private;
 630         unsigned char *packet = psmouse->packet;
 631         unsigned char button_status = 0, lscroll = 0, rscroll = 0;
 632         int rel_x, rel_y;
 633
 634         if (psmouse->pktcnt < 4)
 635                 return PSMOUSE_GOOD_DATA;
 636
 637         /*
 638          * Full packet accumulated, process it
 639          */
 640
 641         switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
 642         case FSP_PKT_TYPE_ABS:
 643                 dev_warn(&psmouse->ps2dev.serio->dev,
 644                          "Unexpected absolute mode packet, ignored.\n");
 645                 break;
 646
 647         case FSP_PKT_TYPE_NORMAL_OPC:
 648                 /* on-pad click, filter it if necessary */
 649                 if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
 650                         packet[0] &= ~BIT(0);
 651                 /* fall through */
 652
 653         case FSP_PKT_TYPE_NORMAL:
 654                 /* normal packet */
 655                 /* special packet data translation from on-pad packets */
 656                 if (packet[3] != 0) {
 657                         if (packet[3] & BIT(0))
 658                                 button_status |= 0x01;  /* wheel down */
 659                         if (packet[3] & BIT(1))
 660                                 button_status |= 0x0f;  /* wheel up */
 661                         if (packet[3] & BIT(2))
 662                                 button_status |= BIT(4);/* horizontal left */
 663                         if (packet[3] & BIT(3))
 664                                 button_status |= BIT(5);/* horizontal right */
 665                         /* push back to packet queue */
 666                         if (button_status != 0)
 667                                 packet[3] = button_status;
 668                         rscroll = (packet[3] >> 4) & 1;
 669                         lscroll = (packet[3] >> 5) & 1;
 670                 }
 671                 /*
 672                  * Processing wheel up/down and extra button events
 673                  */
 674                 input_report_rel(dev, REL_WHEEL,
 675                                  (int)(packet[3] & 8) - (int)(packet[3] & 7));
 676                 input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
 677                 input_report_key(dev, BTN_BACK, lscroll);
 678                 input_report_key(dev, BTN_FORWARD, rscroll);
 679
 680                 /*
 681                  * Standard PS/2 Mouse
 682                  */
 683                 input_report_key(dev, BTN_LEFT, packet[0] & 1);
 684                 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 685                 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
 686
 687                 rel_x = packet[1] ? (int)packet[1] - (int)((packet[0] << 4) & 0x100) : 0;
 688                 rel_y = packet[2] ? (int)((packet[0] << 3) & 0x100) - (int)packet[2] : 0;
 689
 690                 input_report_rel(dev, REL_X, rel_x);
 691                 input_report_rel(dev, REL_Y, rel_y);
 692                 break;
 693         }
 694
 695         input_sync(dev);
 696
 697         fsp_packet_debug(packet);
 698
 699         return PSMOUSE_FULL_PACKET;
 700 }
 701
 702 static int fsp_activate_protocol(struct psmouse *psmouse)
 703 {
 704         struct fsp_data *pad = psmouse->private;
 705         struct ps2dev *ps2dev = &psmouse->ps2dev;
 706         unsigned char param[2];
 707         int val;
 708
 709         /*
 710          * Standard procedure to enter FSP Intellimouse mode
 711          * (scrolling wheel, 4th and 5th buttons)
 712          */
 713         param[0] = 200;
 714         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 715         param[0] = 200;
 716         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 717         param[0] =  80;
 718         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 719
 720         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 721         if (param[0] != 0x04) {
 722                 dev_err(&psmouse->ps2dev.serio->dev,
 723                         "Unable to enable 4 bytes packet format.\n");
 724                 return -EIO;
 725         }
 726
 727         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
 728                 dev_err(&psmouse->ps2dev.serio->dev,
 729                         "Unable to read SYSCTL5 register.\n");
 730                 return -EIO;
 731         }
 732
 733         val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
 734         /* Ensure we are not in absolute mode */
 735         val &= ~FSP_BIT_EN_PKT_G0;
 736         if (pad->buttons == 0x06) {
 737                 /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 738                 val |= FSP_BIT_EN_MSID6;
 739         }
 740
 741         if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
 742                 dev_err(&psmouse->ps2dev.serio->dev,
 743                         "Unable to set up required mode bits.\n");
 744                 return -EIO;
 745         }
 746
 747         /*
 748          * Enable OPC tags such that driver can tell the difference between
 749          * on-pad and real button click
 750          */
 751         if (fsp_opc_tag_enable(psmouse, true))
 752                 dev_warn(&psmouse->ps2dev.serio->dev,
 753                          "Failed to enable OPC tag mode.\n");
 754
 755         /* Enable on-pad vertical and horizontal scrolling */
 756         fsp_onpad_vscr(psmouse, true);
 757         fsp_onpad_hscr(psmouse, true);
 758
 759         return 0;
 760 }
 761
 762 int fsp_detect(struct psmouse *psmouse, bool set_properties)
 763 {
 764         int id;
 765
 766         if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
 767                 return -EIO;
 768
 769         if (id != 0x01)
 770                 return -ENODEV;
 771
 772         if (set_properties) {
 773                 psmouse->vendor = "Sentelic";
 774                 psmouse->name = "FingerSensingPad";
 775         }
 776
 777         return 0;
 778 }
 779
 780 static void fsp_reset(struct psmouse *psmouse)
 781 {
 782         fsp_opc_tag_enable(psmouse, false);
 783         fsp_onpad_vscr(psmouse, false);
 784         fsp_onpad_hscr(psmouse, false);
 785 }
 786
 787 static void fsp_disconnect(struct psmouse *psmouse)
 788 {
 789         sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
 790                            &fsp_attribute_group);
 791
 792         fsp_reset(psmouse);
 793         kfree(psmouse->private);
 794 }
 795
 796 static int fsp_reconnect(struct psmouse *psmouse)
 797 {
 798         int version;
 799
 800         if (fsp_detect(psmouse, 0))
 801                 return -ENODEV;
 802
 803         if (fsp_get_version(psmouse, &version))
 804                 return -ENODEV;
 805
 806         if (fsp_activate_protocol(psmouse))
 807                 return -EIO;
 808
 809         return 0;
 810 }
 811
 812 int fsp_init(struct psmouse *psmouse)
 813 {
 814         struct fsp_data *priv;
 815         int ver, rev, buttons;
 816         int error;
 817
 818         if (fsp_get_version(psmouse, &ver) ||
 819             fsp_get_revision(psmouse, &rev) ||
 820             fsp_get_buttons(psmouse, &buttons)) {
 821                 return -ENODEV;
 822         }
 823
 824         printk(KERN_INFO
 825                 "Finger Sensing Pad, hw: %d.%d.%d, sw: %s, buttons: %d\n",
 826                 ver >> 4, ver & 0x0F, rev, fsp_drv_ver, buttons & 7);
 827
 828         psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
 829         if (!priv)
 830                 return -ENOMEM;
 831
 832         priv->ver = ver;
 833         priv->rev = rev;
 834         priv->buttons = buttons;
 835
 836         /* enable on-pad click by default */
 837         priv->flags |= FSPDRV_FLAG_EN_OPC;
 838
 839         /* Set up various supported input event bits */
 840         __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 841         __set_bit(BTN_BACK, psmouse->dev->keybit);
 842         __set_bit(BTN_FORWARD, psmouse->dev->keybit);
 843         __set_bit(REL_WHEEL, psmouse->dev->relbit);
 844         __set_bit(REL_HWHEEL, psmouse->dev->relbit);
 845
 846         psmouse->protocol_handler = fsp_process_byte;
 847         psmouse->disconnect = fsp_disconnect;
 848         psmouse->reconnect = fsp_reconnect;
 849         psmouse->cleanup = fsp_reset;
 850         psmouse->pktsize = 4;
 851
 852         /* set default packet output based on number of buttons we found */
 853         error = fsp_activate_protocol(psmouse);
 854         if (error)
 855                 goto err_out;
 856
 857         error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
 858                                    &fsp_attribute_group);
 859         if (error) {
 860                 dev_err(&psmouse->ps2dev.serio->dev,
 861                         "Failed to create sysfs attributes (%d)", error);
 862                 goto err_out;
 863         }
 864
 865         return 0;
 866
 867  err_out:
 868         kfree(psmouse->private);
 869         psmouse->private = NULL;
 870         return error;
 871 }