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/input.h>
  24 #include <linux/ctype.h>
  25 #include <linux/libps2.h>
  26 #include <linux/serio.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/slab.h>
  29
  30 #include "psmouse.h"
  31 #include "sentelic.h"
  32
  33 /*
  34  * Timeout for FSP PS/2 command only (in milliseconds).
  35  */
  36 #define FSP_CMD_TIMEOUT         200
  37 #define FSP_CMD_TIMEOUT2        30
  38
  39 /** Driver version. */
  40 static const char fsp_drv_ver[] = "1.0.0-K";
  41
  42 /*
  43  * Make sure that the value being sent to FSP will not conflict with
  44  * possible sample rate values.
  45  */
  46 static unsigned char fsp_test_swap_cmd(unsigned char reg_val)
  47 {
  48         switch (reg_val) {
  49         case 10: case 20: case 40: case 60: case 80: case 100: case 200:
  50                 /*
  51                  * The requested value being sent to FSP matched to possible
  52                  * sample rates, swap the given value such that the hardware
  53                  * wouldn't get confused.
  54                  */
  55                 return (reg_val >> 4) | (reg_val << 4);
  56         default:
  57                 return reg_val; /* swap isn't necessary */
  58         }
  59 }
  60
  61 /*
  62  * Make sure that the value being sent to FSP will not conflict with certain
  63  * commands.
  64  */
  65 static unsigned char fsp_test_invert_cmd(unsigned char reg_val)
  66 {
  67         switch (reg_val) {
  68         case 0xe9: case 0xee: case 0xf2: case 0xff:
  69                 /*
  70                  * The requested value being sent to FSP matched to certain
  71                  * commands, inverse the given value such that the hardware
  72                  * wouldn't get confused.
  73                  */
  74                 return ~reg_val;
  75         default:
  76                 return reg_val; /* inversion isn't necessary */
  77         }
  78 }
  79
  80 static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
  81 {
  82         struct ps2dev *ps2dev = &psmouse->ps2dev;
  83         unsigned char param[3];
  84         unsigned char addr;
  85         int rc = -1;
  86
  87         /*
  88          * We need to shut off the device and switch it into command
  89          * mode so we don't confuse our protocol handler. We don't need
  90          * to do that for writes because sysfs set helper does this for
  91          * us.
  92          */
  93         ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
  94         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
  95
  96         ps2_begin_command(ps2dev);
  97
  98         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
  99                 goto out;
 100
 101         /* should return 0xfe(request for resending) */
 102         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 103         /* should return 0xfc(failed) */
 104         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 105
 106         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 107                 goto out;
 108
 109         if ((addr = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 110                 ps2_sendbyte(ps2dev, 0x68, FSP_CMD_TIMEOUT2);
 111         } else if ((addr = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 112                 /* swapping is required */
 113                 ps2_sendbyte(ps2dev, 0xcc, FSP_CMD_TIMEOUT2);
 114                 /* expect 0xfe */
 115         } else {
 116                 /* swapping isn't necessary */
 117                 ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 118                 /* expect 0xfe */
 119         }
 120         /* should return 0xfc(failed) */
 121         ps2_sendbyte(ps2dev, addr, FSP_CMD_TIMEOUT);
 122
 123         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) < 0)
 124                 goto out;
 125
 126         *reg_val = param[2];
 127         rc = 0;
 128
 129  out:
 130         ps2_end_command(ps2dev);
 131         ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 132         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 133         dev_dbg(&ps2dev->serio->dev, "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
 134                 reg_addr, *reg_val, rc);
 135         return rc;
 136 }
 137
 138 static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
 139 {
 140         struct ps2dev *ps2dev = &psmouse->ps2dev;
 141         unsigned char v;
 142         int rc = -1;
 143
 144         ps2_begin_command(ps2dev);
 145
 146         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 147                 goto out;
 148
 149         if ((v = fsp_test_invert_cmd(reg_addr)) != reg_addr) {
 150                 /* inversion is required */
 151                 ps2_sendbyte(ps2dev, 0x74, FSP_CMD_TIMEOUT2);
 152         } else {
 153                 if ((v = fsp_test_swap_cmd(reg_addr)) != reg_addr) {
 154                         /* swapping is required */
 155                         ps2_sendbyte(ps2dev, 0x77, FSP_CMD_TIMEOUT2);
 156                 } else {
 157                         /* swapping isn't necessary */
 158                         ps2_sendbyte(ps2dev, 0x55, FSP_CMD_TIMEOUT2);
 159                 }
 160         }
 161         /* write the register address in correct order */
 162         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 163
 164         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 165                 return -1;
 166
 167         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 168                 /* inversion is required */
 169                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 170         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 171                 /* swapping is required */
 172                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 173         } else {
 174                 /* swapping isn't necessary */
 175                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 176         }
 177
 178         /* write the register value in correct order */
 179         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 180         rc = 0;
 181
 182  out:
 183         ps2_end_command(ps2dev);
 184         dev_dbg(&ps2dev->serio->dev, "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
 185                 reg_addr, reg_val, rc);
 186         return rc;
 187 }
 188
 189 /* Enable register clock gating for writing certain registers */
 190 static int fsp_reg_write_enable(struct psmouse *psmouse, bool enable)
 191 {
 192         int v, nv;
 193
 194         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL1, &v) == -1)
 195                 return -1;
 196
 197         if (enable)
 198                 nv = v | FSP_BIT_EN_REG_CLK;
 199         else
 200                 nv = v & ~FSP_BIT_EN_REG_CLK;
 201
 202         /* only write if necessary */
 203         if (nv != v)
 204                 if (fsp_reg_write(psmouse, FSP_REG_SYSCTL1, nv) == -1)
 205                         return -1;
 206
 207         return 0;
 208 }
 209
 210 static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
 211 {
 212         struct ps2dev *ps2dev = &psmouse->ps2dev;
 213         unsigned char param[3];
 214         int rc = -1;
 215
 216         ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE);
 217         psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
 218
 219         ps2_begin_command(ps2dev);
 220
 221         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 222                 goto out;
 223
 224         ps2_sendbyte(ps2dev, 0x66, FSP_CMD_TIMEOUT2);
 225         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 226
 227         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 228                 goto out;
 229
 230         ps2_sendbyte(ps2dev, 0x83, FSP_CMD_TIMEOUT2);
 231         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 232
 233         /* get the returned result */
 234         if (__ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
 235                 goto out;
 236
 237         *reg_val = param[2];
 238         rc = 0;
 239
 240  out:
 241         ps2_end_command(ps2dev);
 242         ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
 243         psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
 244         dev_dbg(&ps2dev->serio->dev, "READ PAGE REG: 0x%02x (rc = %d)\n",
 245                 *reg_val, rc);
 246         return rc;
 247 }
 248
 249 static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
 250 {
 251         struct ps2dev *ps2dev = &psmouse->ps2dev;
 252         unsigned char v;
 253         int rc = -1;
 254
 255         ps2_begin_command(ps2dev);
 256
 257         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 258                 goto out;
 259
 260         ps2_sendbyte(ps2dev, 0x38, FSP_CMD_TIMEOUT2);
 261         ps2_sendbyte(ps2dev, 0x88, FSP_CMD_TIMEOUT2);
 262
 263         if (ps2_sendbyte(ps2dev, 0xf3, FSP_CMD_TIMEOUT) < 0)
 264                 return -1;
 265
 266         if ((v = fsp_test_invert_cmd(reg_val)) != reg_val) {
 267                 ps2_sendbyte(ps2dev, 0x47, FSP_CMD_TIMEOUT2);
 268         } else if ((v = fsp_test_swap_cmd(reg_val)) != reg_val) {
 269                 /* swapping is required */
 270                 ps2_sendbyte(ps2dev, 0x44, FSP_CMD_TIMEOUT2);
 271         } else {
 272                 /* swapping isn't necessary */
 273                 ps2_sendbyte(ps2dev, 0x33, FSP_CMD_TIMEOUT2);
 274         }
 275
 276         ps2_sendbyte(ps2dev, v, FSP_CMD_TIMEOUT2);
 277         rc = 0;
 278
 279  out:
 280         ps2_end_command(ps2dev);
 281         dev_dbg(&ps2dev->serio->dev, "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
 282                 reg_val, rc);
 283         return rc;
 284 }
 285
 286 static int fsp_get_version(struct psmouse *psmouse, int *version)
 287 {
 288         if (fsp_reg_read(psmouse, FSP_REG_VERSION, version))
 289                 return -EIO;
 290
 291         return 0;
 292 }
 293
 294 static int fsp_get_revision(struct psmouse *psmouse, int *rev)
 295 {
 296         if (fsp_reg_read(psmouse, FSP_REG_REVISION, rev))
 297                 return -EIO;
 298
 299         return 0;
 300 }
 301
 302 static int fsp_get_buttons(struct psmouse *psmouse, int *btn)
 303 {
 304         static const int buttons[] = {
 305                 0x16, /* Left/Middle/Right/Forward/Backward & Scroll Up/Down */
 306                 0x06, /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 307                 0x04, /* Left/Middle/Right & Scroll Up/Down */
 308                 0x02, /* Left/Middle/Right */
 309         };
 310         int val;
 311
 312         if (fsp_reg_read(psmouse, FSP_REG_TMOD_STATUS1, &val) == -1)
 313                 return -EIO;
 314
 315         *btn = buttons[(val & 0x30) >> 4];
 316         return 0;
 317 }
 318
 319 /* Enable on-pad command tag output */
 320 static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
 321 {
 322         int v, nv;
 323         int res = 0;
 324
 325         if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
 326                 dev_err(&psmouse->ps2dev.serio->dev, "Unable get OPC state.\n");
 327                 return -EIO;
 328         }
 329
 330         if (enable)
 331                 nv = v | FSP_BIT_EN_OPC_TAG;
 332         else
 333                 nv = v & ~FSP_BIT_EN_OPC_TAG;
 334
 335         /* only write if necessary */
 336         if (nv != v) {
 337                 fsp_reg_write_enable(psmouse, true);
 338                 res = fsp_reg_write(psmouse, FSP_REG_OPC_QDOWN, nv);
 339                 fsp_reg_write_enable(psmouse, false);
 340         }
 341
 342         if (res != 0) {
 343                 dev_err(&psmouse->ps2dev.serio->dev,
 344                         "Unable to enable OPC tag.\n");
 345                 res = -EIO;
 346         }
 347
 348         return res;
 349 }
 350
 351 static int fsp_onpad_vscr(struct psmouse *psmouse, bool enable)
 352 {
 353         struct fsp_data *pad = psmouse->private;
 354         int val;
 355
 356         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 357                 return -EIO;
 358
 359         pad->vscroll = enable;
 360
 361         if (enable)
 362                 val |= (FSP_BIT_FIX_VSCR | FSP_BIT_ONPAD_ENABLE);
 363         else
 364                 val &= ~FSP_BIT_FIX_VSCR;
 365
 366         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 367                 return -EIO;
 368
 369         return 0;
 370 }
 371
 372 static int fsp_onpad_hscr(struct psmouse *psmouse, bool enable)
 373 {
 374         struct fsp_data *pad = psmouse->private;
 375         int val, v2;
 376
 377         if (fsp_reg_read(psmouse, FSP_REG_ONPAD_CTL, &val))
 378                 return -EIO;
 379
 380         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &v2))
 381                 return -EIO;
 382
 383         pad->hscroll = enable;
 384
 385         if (enable) {
 386                 val |= (FSP_BIT_FIX_HSCR | FSP_BIT_ONPAD_ENABLE);
 387                 v2 |= FSP_BIT_EN_MSID6;
 388         } else {
 389                 val &= ~FSP_BIT_FIX_HSCR;
 390                 v2 &= ~(FSP_BIT_EN_MSID6 | FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8);
 391         }
 392
 393         if (fsp_reg_write(psmouse, FSP_REG_ONPAD_CTL, val))
 394                 return -EIO;
 395
 396         /* reconfigure horizontal scrolling packet output */
 397         if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, v2))
 398                 return -EIO;
 399
 400         return 0;
 401 }
 402
 403 /*
 404  * Write device specific initial parameters.
 405  *
 406  * ex: 0xab 0xcd - write oxcd into register 0xab
 407  */
 408 static ssize_t fsp_attr_set_setreg(struct psmouse *psmouse, void *data,
 409                                    const char *buf, size_t count)
 410 {
 411         unsigned long reg, val;
 412         char *rest;
 413         ssize_t retval;
 414
 415         reg = simple_strtoul(buf, &rest, 16);
 416         if (rest == buf || *rest != ' ' || reg > 0xff)
 417                 return -EINVAL;
 418
 419         if (strict_strtoul(rest + 1, 16, &val) || val > 0xff)
 420                 return -EINVAL;
 421
 422         if (fsp_reg_write_enable(psmouse, true))
 423                 return -EIO;
 424
 425         retval = fsp_reg_write(psmouse, reg, val) < 0 ? -EIO : count;
 426
 427         fsp_reg_write_enable(psmouse, false);
 428
 429         return count;
 430 }
 431
 432 PSMOUSE_DEFINE_WO_ATTR(setreg, S_IWUSR, NULL, fsp_attr_set_setreg);
 433
 434 static ssize_t fsp_attr_show_getreg(struct psmouse *psmouse,
 435                                         void *data, char *buf)
 436 {
 437         struct fsp_data *pad = psmouse->private;
 438
 439         return sprintf(buf, "%02x%02x\n", pad->last_reg, pad->last_val);
 440 }
 441
 442 /*
 443  * Read a register from device.
 444  *
 445  * ex: 0xab -- read content from register 0xab
 446  */
 447 static ssize_t fsp_attr_set_getreg(struct psmouse *psmouse, void *data,
 448                                         const char *buf, size_t count)
 449 {
 450         struct fsp_data *pad = psmouse->private;
 451         unsigned long reg;
 452         int val;
 453
 454         if (strict_strtoul(buf, 16, &reg) || reg > 0xff)
 455                 return -EINVAL;
 456
 457         if (fsp_reg_read(psmouse, reg, &val))
 458                 return -EIO;
 459
 460         pad->last_reg = reg;
 461         pad->last_val = val;
 462
 463         return count;
 464 }
 465
 466 PSMOUSE_DEFINE_ATTR(getreg, S_IWUSR | S_IRUGO, NULL,
 467                         fsp_attr_show_getreg, fsp_attr_set_getreg);
 468
 469 static ssize_t fsp_attr_show_pagereg(struct psmouse *psmouse,
 470                                         void *data, char *buf)
 471 {
 472         int val = 0;
 473
 474         if (fsp_page_reg_read(psmouse, &val))
 475                 return -EIO;
 476
 477         return sprintf(buf, "%02x\n", val);
 478 }
 479
 480 static ssize_t fsp_attr_set_pagereg(struct psmouse *psmouse, void *data,
 481                                         const char *buf, size_t count)
 482 {
 483         unsigned long val;
 484
 485         if (strict_strtoul(buf, 16, &val) || val > 0xff)
 486                 return -EINVAL;
 487
 488         if (fsp_page_reg_write(psmouse, val))
 489                 return -EIO;
 490
 491         return count;
 492 }
 493
 494 PSMOUSE_DEFINE_ATTR(page, S_IWUSR | S_IRUGO, NULL,
 495                         fsp_attr_show_pagereg, fsp_attr_set_pagereg);
 496
 497 static ssize_t fsp_attr_show_vscroll(struct psmouse *psmouse,
 498                                         void *data, char *buf)
 499 {
 500         struct fsp_data *pad = psmouse->private;
 501
 502         return sprintf(buf, "%d\n", pad->vscroll);
 503 }
 504
 505 static ssize_t fsp_attr_set_vscroll(struct psmouse *psmouse, void *data,
 506                                         const char *buf, size_t count)
 507 {
 508         unsigned long val;
 509
 510         if (strict_strtoul(buf, 10, &val) || val > 1)
 511                 return -EINVAL;
 512
 513         fsp_onpad_vscr(psmouse, val);
 514
 515         return count;
 516 }
 517
 518 PSMOUSE_DEFINE_ATTR(vscroll, S_IWUSR | S_IRUGO, NULL,
 519                         fsp_attr_show_vscroll, fsp_attr_set_vscroll);
 520
 521 static ssize_t fsp_attr_show_hscroll(struct psmouse *psmouse,
 522                                         void *data, char *buf)
 523 {
 524         struct fsp_data *pad = psmouse->private;
 525
 526         return sprintf(buf, "%d\n", pad->hscroll);
 527 }
 528
 529 static ssize_t fsp_attr_set_hscroll(struct psmouse *psmouse, void *data,
 530                                         const char *buf, size_t count)
 531 {
 532         unsigned long val;
 533
 534         if (strict_strtoul(buf, 10, &val) || val > 1)
 535                 return -EINVAL;
 536
 537         fsp_onpad_hscr(psmouse, val);
 538
 539         return count;
 540 }
 541
 542 PSMOUSE_DEFINE_ATTR(hscroll, S_IWUSR | S_IRUGO, NULL,
 543                         fsp_attr_show_hscroll, fsp_attr_set_hscroll);
 544
 545 static ssize_t fsp_attr_show_flags(struct psmouse *psmouse,
 546                                         void *data, char *buf)
 547 {
 548         struct fsp_data *pad = psmouse->private;
 549
 550         return sprintf(buf, "%c\n",
 551                         pad->flags & FSPDRV_FLAG_EN_OPC ? 'C' : 'c');
 552 }
 553
 554 static ssize_t fsp_attr_set_flags(struct psmouse *psmouse, void *data,
 555                                         const char *buf, size_t count)
 556 {
 557         struct fsp_data *pad = psmouse->private;
 558         size_t i;
 559
 560         for (i = 0; i < count; i++) {
 561                 switch (buf[i]) {
 562                 case 'C':
 563                         pad->flags |= FSPDRV_FLAG_EN_OPC;
 564                         break;
 565                 case 'c':
 566                         pad->flags &= ~FSPDRV_FLAG_EN_OPC;
 567                         break;
 568                 default:
 569                         return -EINVAL;
 570                 }
 571         }
 572         return count;
 573 }
 574
 575 PSMOUSE_DEFINE_ATTR(flags, S_IWUSR | S_IRUGO, NULL,
 576                         fsp_attr_show_flags, fsp_attr_set_flags);
 577
 578 static ssize_t fsp_attr_show_ver(struct psmouse *psmouse,
 579                                         void *data, char *buf)
 580 {
 581         return sprintf(buf, "Sentelic FSP kernel module %s\n", fsp_drv_ver);
 582 }
 583
 584 PSMOUSE_DEFINE_RO_ATTR(ver, S_IRUGO, NULL, fsp_attr_show_ver);
 585
 586 static struct attribute *fsp_attributes[] = {
 587         &psmouse_attr_setreg.dattr.attr,
 588         &psmouse_attr_getreg.dattr.attr,
 589         &psmouse_attr_page.dattr.attr,
 590         &psmouse_attr_vscroll.dattr.attr,
 591         &psmouse_attr_hscroll.dattr.attr,
 592         &psmouse_attr_flags.dattr.attr,
 593         &psmouse_attr_ver.dattr.attr,
 594         NULL
 595 };
 596
 597 static struct attribute_group fsp_attribute_group = {
 598         .attrs = fsp_attributes,
 599 };
 600
 601 #ifdef FSP_DEBUG
 602 static void fsp_packet_debug(unsigned char packet[])
 603 {
 604         static unsigned int ps2_packet_cnt;
 605         static unsigned int ps2_last_second;
 606         unsigned int jiffies_msec;
 607
 608         ps2_packet_cnt++;
 609         jiffies_msec = jiffies_to_msecs(jiffies);
 610         printk(KERN_DEBUG "%08dms PS/2 packets: %02x, %02x, %02x, %02x\n",
 611                 jiffies_msec, packet[0], packet[1], packet[2], packet[3]);
 612
 613         if (jiffies_msec - ps2_last_second > 1000) {
 614                 printk(KERN_DEBUG "PS/2 packets/sec = %d\n", ps2_packet_cnt);
 615                 ps2_packet_cnt = 0;
 616                 ps2_last_second = jiffies_msec;
 617         }
 618 }
 619 #else
 620 static void fsp_packet_debug(unsigned char packet[])
 621 {
 622 }
 623 #endif
 624
 625 static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 626 {
 627         struct input_dev *dev = psmouse->dev;
 628         struct fsp_data *ad = psmouse->private;
 629         unsigned char *packet = psmouse->packet;
 630         unsigned char button_status = 0, lscroll = 0, rscroll = 0;
 631         int rel_x, rel_y;
 632
 633         if (psmouse->pktcnt < 4)
 634                 return PSMOUSE_GOOD_DATA;
 635
 636         /*
 637          * Full packet accumulated, process it
 638          */
 639
 640         switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
 641         case FSP_PKT_TYPE_ABS:
 642                 dev_warn(&psmouse->ps2dev.serio->dev,
 643                          "Unexpected absolute mode packet, ignored.\n");
 644                 break;
 645
 646         case FSP_PKT_TYPE_NORMAL_OPC:
 647                 /* on-pad click, filter it if necessary */
 648                 if ((ad->flags & FSPDRV_FLAG_EN_OPC) != FSPDRV_FLAG_EN_OPC)
 649                         packet[0] &= ~BIT(0);
 650                 /* fall through */
 651
 652         case FSP_PKT_TYPE_NORMAL:
 653                 /* normal packet */
 654                 /* special packet data translation from on-pad packets */
 655                 if (packet[3] != 0) {
 656                         if (packet[3] & BIT(0))
 657                                 button_status |= 0x01;  /* wheel down */
 658                         if (packet[3] & BIT(1))
 659                                 button_status |= 0x0f;  /* wheel up */
 660                         if (packet[3] & BIT(2))
 661                                 button_status |= BIT(4);/* horizontal left */
 662                         if (packet[3] & BIT(3))
 663                                 button_status |= BIT(5);/* horizontal right */
 664                         /* push back to packet queue */
 665                         if (button_status != 0)
 666                                 packet[3] = button_status;
 667                         rscroll = (packet[3] >> 4) & 1;
 668                         lscroll = (packet[3] >> 5) & 1;
 669                 }
 670                 /*
 671                  * Processing wheel up/down and extra button events
 672                  */
 673                 input_report_rel(dev, REL_WHEEL,
 674                                  (int)(packet[3] & 8) - (int)(packet[3] & 7));
 675                 input_report_rel(dev, REL_HWHEEL, lscroll - rscroll);
 676                 input_report_key(dev, BTN_BACK, lscroll);
 677                 input_report_key(dev, BTN_FORWARD, rscroll);
 678
 679                 /*
 680                  * Standard PS/2 Mouse
 681                  */
 682                 input_report_key(dev, BTN_LEFT, packet[0] & 1);
 683                 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
 684                 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
 685
 686                 rel_x = packet[1] ? (int)packet[1] - (int)((packet[0] << 4) & 0x100) : 0;
 687                 rel_y = packet[2] ? (int)((packet[0] << 3) & 0x100) - (int)packet[2] : 0;
 688
 689                 input_report_rel(dev, REL_X, rel_x);
 690                 input_report_rel(dev, REL_Y, rel_y);
 691                 break;
 692         }
 693
 694         input_sync(dev);
 695
 696         fsp_packet_debug(packet);
 697
 698         return PSMOUSE_FULL_PACKET;
 699 }
 700
 701 static int fsp_activate_protocol(struct psmouse *psmouse)
 702 {
 703         struct fsp_data *pad = psmouse->private;
 704         struct ps2dev *ps2dev = &psmouse->ps2dev;
 705         unsigned char param[2];
 706         int val;
 707
 708         /*
 709          * Standard procedure to enter FSP Intellimouse mode
 710          * (scrolling wheel, 4th and 5th buttons)
 711          */
 712         param[0] = 200;
 713         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 714         param[0] = 200;
 715         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 716         param[0] =  80;
 717         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
 718
 719         ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 720         if (param[0] != 0x04) {
 721                 dev_err(&psmouse->ps2dev.serio->dev,
 722                         "Unable to enable 4 bytes packet format.\n");
 723                 return -EIO;
 724         }
 725
 726         if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
 727                 dev_err(&psmouse->ps2dev.serio->dev,
 728                         "Unable to read SYSCTL5 register.\n");
 729                 return -EIO;
 730         }
 731
 732         val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
 733         /* Ensure we are not in absolute mode */
 734         val &= ~FSP_BIT_EN_PKT_G0;
 735         if (pad->buttons == 0x06) {
 736                 /* Left/Middle/Right & Scroll Up/Down/Right/Left */
 737                 val |= FSP_BIT_EN_MSID6;
 738         }
 739
 740         if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
 741                 dev_err(&psmouse->ps2dev.serio->dev,
 742                         "Unable to set up required mode bits.\n");
 743                 return -EIO;
 744         }
 745
 746         /*
 747          * Enable OPC tags such that driver can tell the difference between
 748          * on-pad and real button click
 749          */
 750         if (fsp_opc_tag_enable(psmouse, true))
 751                 dev_warn(&psmouse->ps2dev.serio->dev,
 752                          "Failed to enable OPC tag mode.\n");
 753
 754         /* Enable on-pad vertical and horizontal scrolling */
 755         fsp_onpad_vscr(psmouse, true);
 756         fsp_onpad_hscr(psmouse, true);
 757
 758         return 0;
 759 }
 760
 761 int fsp_detect(struct psmouse *psmouse, bool set_properties)
 762 {
 763         int id;
 764
 765         if (fsp_reg_read(psmouse, FSP_REG_DEVICE_ID, &id))
 766                 return -EIO;
 767
 768         if (id != 0x01)
 769                 return -ENODEV;
 770
 771         if (set_properties) {
 772                 psmouse->vendor = "Sentelic";
 773                 psmouse->name = "FingerSensingPad";
 774         }
 775
 776         return 0;
 777 }
 778
 779 static void fsp_reset(struct psmouse *psmouse)
 780 {
 781         fsp_opc_tag_enable(psmouse, false);
 782         fsp_onpad_vscr(psmouse, false);
 783         fsp_onpad_hscr(psmouse, false);
 784 }
 785
 786 static void fsp_disconnect(struct psmouse *psmouse)
 787 {
 788         sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
 789                            &fsp_attribute_group);
 790
 791         fsp_reset(psmouse);
 792         kfree(psmouse->private);
 793 }
 794
 795 static int fsp_reconnect(struct psmouse *psmouse)
 796 {
 797         int version;
 798
 799         if (fsp_detect(psmouse, 0))
 800                 return -ENODEV;
 801
 802         if (fsp_get_version(psmouse, &version))
 803                 return -ENODEV;
 804
 805         if (fsp_activate_protocol(psmouse))
 806                 return -EIO;
 807
 808         return 0;
 809 }
 810
 811 int fsp_init(struct psmouse *psmouse)
 812 {
 813         struct fsp_data *priv;
 814         int ver, rev, buttons;
 815         int error;
 816
 817         if (fsp_get_version(psmouse, &ver) ||
 818             fsp_get_revision(psmouse, &rev) ||
 819             fsp_get_buttons(psmouse, &buttons)) {
 820                 return -ENODEV;
 821         }
 822
 823         printk(KERN_INFO
 824                 "Finger Sensing Pad, hw: %d.%d.%d, sw: %s, buttons: %d\n",
 825                 ver >> 4, ver & 0x0F, rev, fsp_drv_ver, buttons & 7);
 826
 827         psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
 828         if (!priv)
 829                 return -ENOMEM;
 830
 831         priv->ver = ver;
 832         priv->rev = rev;
 833         priv->buttons = buttons;
 834
 835         /* enable on-pad click by default */
 836         priv->flags |= FSPDRV_FLAG_EN_OPC;
 837
 838         /* Set up various supported input event bits */
 839         __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
 840         __set_bit(BTN_BACK, psmouse->dev->keybit);
 841         __set_bit(BTN_FORWARD, psmouse->dev->keybit);
 842         __set_bit(REL_WHEEL, psmouse->dev->relbit);
 843         __set_bit(REL_HWHEEL, psmouse->dev->relbit);
 844
 845         psmouse->protocol_handler = fsp_process_byte;
 846         psmouse->disconnect = fsp_disconnect;
 847         psmouse->reconnect = fsp_reconnect;
 848         psmouse->cleanup = fsp_reset;
 849         psmouse->pktsize = 4;
 850
 851         /* set default packet output based on number of buttons we found */
 852         error = fsp_activate_protocol(psmouse);
 853         if (error)
 854                 goto err_out;
 855
 856         error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
 857                                    &fsp_attribute_group);
 858         if (error) {
 859                 dev_err(&psmouse->ps2dev.serio->dev,
 860                         "Failed to create sysfs attributes (%d)", error);
 861                 goto err_out;
 862         }
 863
 864         return 0;
 865
 866  err_out:
 867         kfree(psmouse->private);
 868         psmouse->private = NULL;
 869         return error;
 870 }