drivers/media/dvb/frontends/drx397xD.c

   1 /*
   2  * Driver for Micronas drx397xD demodulator
   3  *
   4  * Copyright (C) 2007 Henk Vergonet <Henk.Vergonet@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #define DEBUG                   /* uncomment if you want debugging output */
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/init.h>
  25 #include <linux/device.h>
  26 #include <linux/delay.h>
  27 #include <linux/string.h>
  28 #include <linux/firmware.h>
  29 #include <linux/slab.h>
  30 #include <asm/div64.h>
  31
  32 #include "dvb_frontend.h"
  33 #include "drx397xD.h"
  34
  35 static const char mod_name[] = "drx397xD";
  36
  37 #define MAX_CLOCK_DRIFT         200     /* maximal 200 PPM allowed */
  38
  39 #define F_SET_0D0h      1
  40 #define F_SET_0D4h      2
  41
  42 enum fw_ix {
  43 #define _FW_ENTRY(a, b, c)      b
  44 #include "drx397xD_fw.h"
  45 };
  46
  47 /* chip specifics */
  48 struct drx397xD_state {
  49         struct i2c_adapter *i2c;
  50         struct dvb_frontend frontend;
  51         struct drx397xD_config config;
  52         enum fw_ix chip_rev;
  53         int flags;
  54         u32 bandwidth_parm;     /* internal bandwidth conversions */
  55         u32 f_osc;              /* w90: actual osc frequency [Hz] */
  56 };
  57
  58 /* Firmware */
  59 static const char *blob_name[] = {
  60 #define _BLOB_ENTRY(a, b)               a
  61 #include "drx397xD_fw.h"
  62 };
  63
  64 enum blob_ix {
  65 #define _BLOB_ENTRY(a, b)               b
  66 #include "drx397xD_fw.h"
  67 };
  68
  69 static struct {
  70         const char *name;
  71         const struct firmware *file;
  72         rwlock_t lock;
  73         int refcnt;
  74         const u8 *data[ARRAY_SIZE(blob_name)];
  75 } fw[] = {
  76 #define _FW_ENTRY(a, b, c)      {                                       \
  77                         .name   = a,                                    \
  78                         .file   = NULL,                                 \
  79                         .lock   = __RW_LOCK_UNLOCKED(fw[c].lock),       \
  80                         .refcnt = 0,                                    \
  81                         .data   = { }           }
  82 #include "drx397xD_fw.h"
  83 };
  84
  85 /* use only with writer lock acquired */
  86 static void _drx_release_fw(struct drx397xD_state *s, enum fw_ix ix)
  87 {
  88         memset(&fw[ix].data[0], 0, sizeof(fw[0].data));
  89         if (fw[ix].file)
  90                 release_firmware(fw[ix].file);
  91 }
  92
  93 static void drx_release_fw(struct drx397xD_state *s)
  94 {
  95         enum fw_ix ix = s->chip_rev;
  96
  97         pr_debug("%s\n", __func__);
  98
  99         write_lock(&fw[ix].lock);
 100         if (fw[ix].refcnt) {
 101                 fw[ix].refcnt--;
 102                 if (fw[ix].refcnt == 0)
 103                         _drx_release_fw(s, ix);
 104         }
 105         write_unlock(&fw[ix].lock);
 106 }
 107
 108 static int drx_load_fw(struct drx397xD_state *s, enum fw_ix ix)
 109 {
 110         const u8 *data;
 111         size_t size, len;
 112         int i = 0, j, rc = -EINVAL;
 113
 114         pr_debug("%s\n", __func__);
 115
 116         if (ix < 0 || ix >= ARRAY_SIZE(fw))
 117                 return -EINVAL;
 118         s->chip_rev = ix;
 119
 120         write_lock(&fw[ix].lock);
 121         if (fw[ix].file) {
 122                 rc = 0;
 123                 goto exit_ok;
 124         }
 125         memset(&fw[ix].data[0], 0, sizeof(fw[0].data));
 126
 127         rc = request_firmware(&fw[ix].file, fw[ix].name, s->i2c->dev.parent);
 128         if (rc != 0) {
 129                 printk(KERN_ERR "%s: Firmware \"%s\" not available\n",
 130                        mod_name, fw[ix].name);
 131                 goto exit_err;
 132         }
 133
 134         if (!fw[ix].file->data || fw[ix].file->size < 10)
 135                 goto exit_corrupt;
 136
 137         data = fw[ix].file->data;
 138         size = fw[ix].file->size;
 139
 140         if (data[i++] != 2)     /* check firmware version */
 141                 goto exit_corrupt;
 142
 143         do {
 144                 switch (data[i++]) {
 145                 case 0x00:      /* bytecode */
 146                         if (i >= size)
 147                                 break;
 148                         i += data[i];
 149                 case 0x01:      /* reset */
 150                 case 0x02:      /* sleep */
 151                         i++;
 152                         break;
 153                 case 0xfe:      /* name */
 154                         len = strnlen(&data[i], size - i);
 155                         if (i + len + 1 >= size)
 156                                 goto exit_corrupt;
 157                         if (data[i + len + 1] != 0)
 158                                 goto exit_corrupt;
 159                         for (j = 0; j < ARRAY_SIZE(blob_name); j++) {
 160                                 if (strcmp(blob_name[j], &data[i]) == 0) {
 161                                         fw[ix].data[j] = &data[i + len + 1];
 162                                         pr_debug("Loading %s\n", blob_name[j]);
 163                                 }
 164                         }
 165                         i += len + 1;
 166                         break;
 167                 case 0xff:      /* file terminator */
 168                         if (i == size) {
 169                                 rc = 0;
 170                                 goto exit_ok;
 171                         }
 172                 default:
 173                         goto exit_corrupt;
 174                 }
 175         } while (i < size);
 176
 177 exit_corrupt:
 178         printk(KERN_ERR "%s: Firmware is corrupt\n", mod_name);
 179 exit_err:
 180         _drx_release_fw(s, ix);
 181         fw[ix].refcnt--;
 182 exit_ok:
 183         fw[ix].refcnt++;
 184         write_unlock(&fw[ix].lock);
 185
 186         return rc;
 187 }
 188
 189 /* i2c bus IO */
 190 static int write_fw(struct drx397xD_state *s, enum blob_ix ix)
 191 {
 192         const u8 *data;
 193         int len, rc = 0, i = 0;
 194         struct i2c_msg msg = {
 195                 .addr = s->config.demod_address,
 196                 .flags = 0
 197         };
 198
 199         if (ix < 0 || ix >= ARRAY_SIZE(blob_name)) {
 200                 pr_debug("%s drx_fw_ix_t out of range\n", __func__);
 201                 return -EINVAL;
 202         }
 203         pr_debug("%s %s\n", __func__, blob_name[ix]);
 204
 205         read_lock(&fw[s->chip_rev].lock);
 206         data = fw[s->chip_rev].data[ix];
 207         if (!data) {
 208                 rc = -EINVAL;
 209                 goto exit_rc;
 210         }
 211
 212         for (;;) {
 213                 switch (data[i++]) {
 214                 case 0: /* bytecode */
 215                         len = data[i++];
 216                         msg.len = len;
 217                         msg.buf = (__u8 *) &data[i];
 218                         if (i2c_transfer(s->i2c, &msg, 1) != 1) {
 219                                 rc = -EIO;
 220                                 goto exit_rc;
 221                         }
 222                         i += len;
 223                         break;
 224                 case 1: /* reset */
 225                 case 2: /* sleep */
 226                         i++;
 227                         break;
 228                 default:
 229                         goto exit_rc;
 230                 }
 231         }
 232 exit_rc:
 233         read_unlock(&fw[s->chip_rev].lock);
 234
 235         return 0;
 236 }
 237
 238 /* Function is not endian safe, use the RD16 wrapper below */
 239 static int _read16(struct drx397xD_state *s, __le32 i2c_adr)
 240 {
 241         int rc;
 242         u8 a[4];
 243         __le16 v;
 244         struct i2c_msg msg[2] = {
 245                 {
 246                         .addr = s->config.demod_address,
 247                         .flags = 0,
 248                         .buf = a,
 249                         .len = sizeof(a)
 250                 }, {
 251                         .addr = s->config.demod_address,
 252                         .flags = I2C_M_RD,
 253                         .buf = (u8 *)&v,
 254                         .len = sizeof(v)
 255                 }
 256         };
 257
 258         *(__le32 *) a = i2c_adr;
 259
 260         rc = i2c_transfer(s->i2c, msg, 2);
 261         if (rc != 2)
 262                 return -EIO;
 263
 264         return le16_to_cpu(v);
 265 }
 266
 267 /* Function is not endian safe, use the WR16.. wrappers below */
 268 static int _write16(struct drx397xD_state *s, __le32 i2c_adr, __le16 val)
 269 {
 270         u8 a[6];
 271         int rc;
 272         struct i2c_msg msg = {
 273                 .addr = s->config.demod_address,
 274                 .flags = 0,
 275                 .buf = a,
 276                 .len = sizeof(a)
 277         };
 278
 279         *(__le32 *)a = i2c_adr;
 280         *(__le16 *)&a[4] = val;
 281
 282         rc = i2c_transfer(s->i2c, &msg, 1);
 283         if (rc != 1)
 284                 return -EIO;
 285
 286         return 0;
 287 }
 288
 289 #define WR16(ss, adr, val) \
 290                 _write16(ss, I2C_ADR_C0(adr), cpu_to_le16(val))
 291 #define WR16_E0(ss, adr, val) \
 292                 _write16(ss, I2C_ADR_E0(adr), cpu_to_le16(val))
 293 #define RD16(ss, adr) \
 294                 _read16(ss, I2C_ADR_C0(adr))
 295
 296 #define EXIT_RC(cmd)    \
 297         if ((rc = (cmd)) < 0)   \
 298                 goto exit_rc
 299
 300 /* Tuner callback */
 301 static int PLL_Set(struct drx397xD_state *s,
 302                    struct dvb_frontend_parameters *fep, int *df_tuner)
 303 {
 304         struct dvb_frontend *fe = &s->frontend;
 305         u32 f_tuner, f = fep->frequency;
 306         int rc;
 307
 308         pr_debug("%s\n", __func__);
 309
 310         if ((f > s->frontend.ops.tuner_ops.info.frequency_max) ||
 311             (f < s->frontend.ops.tuner_ops.info.frequency_min))
 312                 return -EINVAL;
 313
 314         *df_tuner = 0;
 315         if (!s->frontend.ops.tuner_ops.set_params ||
 316             !s->frontend.ops.tuner_ops.get_frequency)
 317                 return -ENOSYS;
 318
 319         rc = s->frontend.ops.tuner_ops.set_params(fe, fep);
 320         if (rc < 0)
 321                 return rc;
 322
 323         rc = s->frontend.ops.tuner_ops.get_frequency(fe, &f_tuner);
 324         if (rc < 0)
 325                 return rc;
 326
 327         *df_tuner = f_tuner - f;
 328         pr_debug("%s requested %d [Hz] tuner %d [Hz]\n", __func__, f,
 329                  f_tuner);
 330
 331         return 0;
 332 }
 333
 334 /* Demodulator helper functions */
 335 static int SC_WaitForReady(struct drx397xD_state *s)
 336 {
 337         int cnt = 1000;
 338         int rc;
 339
 340         pr_debug("%s\n", __func__);
 341
 342         while (cnt--) {
 343                 rc = RD16(s, 0x820043);
 344                 if (rc == 0)
 345                         return 0;
 346         }
 347
 348         return -1;
 349 }
 350
 351 static int SC_SendCommand(struct drx397xD_state *s, int cmd)
 352 {
 353         int rc;
 354
 355         pr_debug("%s\n", __func__);
 356
 357         WR16(s, 0x820043, cmd);
 358         SC_WaitForReady(s);
 359         rc = RD16(s, 0x820042);
 360         if ((rc & 0xffff) == 0xffff)
 361                 return -1;
 362
 363         return 0;
 364 }
 365
 366 static int HI_Command(struct drx397xD_state *s, u16 cmd)
 367 {
 368         int rc, cnt = 1000;
 369
 370         pr_debug("%s\n", __func__);
 371
 372         rc = WR16(s, 0x420032, cmd);
 373         if (rc < 0)
 374                 return rc;
 375
 376         do {
 377                 rc = RD16(s, 0x420032);
 378                 if (rc == 0) {
 379                         rc = RD16(s, 0x420031);
 380                         return rc;
 381                 }
 382                 if (rc < 0)
 383                         return rc;
 384         } while (--cnt);
 385
 386         return rc;
 387 }
 388
 389 static int HI_CfgCommand(struct drx397xD_state *s)
 390 {
 391
 392         pr_debug("%s\n", __func__);
 393
 394         WR16(s, 0x420033, 0x3973);
 395         WR16(s, 0x420034, s->config.w50);       /* code 4, log 4 */
 396         WR16(s, 0x420035, s->config.w52);       /* code 15,  log 9 */
 397         WR16(s, 0x420036, s->config.demod_address << 1);
 398         WR16(s, 0x420037, s->config.w56);       /* code (set_i2c ??  initX 1 ), log 1 */
 399         /* WR16(s, 0x420033, 0x3973); */
 400         if ((s->config.w56 & 8) == 0)
 401                 return HI_Command(s, 3);
 402
 403         return WR16(s, 0x420032, 0x3);
 404 }
 405
 406 static const u8 fastIncrDecLUT_15273[] = {
 407         0x0e, 0x0f, 0x0f, 0x10, 0x11, 0x12, 0x12, 0x13, 0x14,
 408         0x15, 0x16, 0x17, 0x18, 0x1a, 0x1b, 0x1c, 0x1d, 0x1f
 409 };
 410
 411 static const u8 slowIncrDecLUT_15272[] = {
 412         3, 4, 4, 5, 6
 413 };
 414
 415 static int SetCfgIfAgc(struct drx397xD_state *s, struct drx397xD_CfgIfAgc *agc)
 416 {
 417         u16 w06 = agc->w06;
 418         u16 w08 = agc->w08;
 419         u16 w0A = agc->w0A;
 420         u16 w0C = agc->w0C;
 421         int quot, rem, i, rc = -EINVAL;
 422
 423         pr_debug("%s\n", __func__);
 424
 425         if (agc->w04 > 0x3ff)
 426                 goto exit_rc;
 427
 428         if (agc->d00 == 1) {
 429                 EXIT_RC(RD16(s, 0x0c20010));
 430                 rc &= ~0x10;
 431                 EXIT_RC(WR16(s, 0x0c20010, rc));
 432                 return WR16(s, 0x0c20030, agc->w04 & 0x7ff);
 433         }
 434
 435         if (agc->d00 != 0)
 436                 goto exit_rc;
 437         if (w0A < w08)
 438                 goto exit_rc;
 439         if (w0A > 0x3ff)
 440                 goto exit_rc;
 441         if (w0C > 0x3ff)
 442                 goto exit_rc;
 443         if (w06 > 0x3ff)
 444                 goto exit_rc;
 445
 446         EXIT_RC(RD16(s, 0x0c20010));
 447         rc |= 0x10;
 448         EXIT_RC(WR16(s, 0x0c20010, rc));
 449
 450         EXIT_RC(WR16(s, 0x0c20025, (w06 >> 1) & 0x1ff));
 451         EXIT_RC(WR16(s, 0x0c20031, (w0A - w08) >> 1));
 452         EXIT_RC(WR16(s, 0x0c20032, ((w0A + w08) >> 1) - 0x1ff));
 453
 454         quot = w0C / 113;
 455         rem = w0C % 113;
 456         if (quot <= 8) {
 457                 quot = 8 - quot;
 458         } else {
 459                 quot = 0;
 460                 rem += 113;
 461         }
 462
 463         EXIT_RC(WR16(s, 0x0c20024, quot));
 464
 465         i = fastIncrDecLUT_15273[rem / 8];
 466         EXIT_RC(WR16(s, 0x0c2002d, i));
 467         EXIT_RC(WR16(s, 0x0c2002e, i));
 468
 469         i = slowIncrDecLUT_15272[rem / 28];
 470         EXIT_RC(WR16(s, 0x0c2002b, i));
 471         rc = WR16(s, 0x0c2002c, i);
 472 exit_rc:
 473         return rc;
 474 }
 475
 476 static int SetCfgRfAgc(struct drx397xD_state *s, struct drx397xD_CfgRfAgc *agc)
 477 {
 478         u16 w04 = agc->w04;
 479         u16 w06 = agc->w06;
 480         int rc = -1;
 481
 482         pr_debug("%s %d 0x%x 0x%x\n", __func__, agc->d00, w04, w06);
 483
 484         if (w04 > 0x3ff)
 485                 goto exit_rc;
 486
 487         switch (agc->d00) {
 488         case 1:
 489                 if (w04 == 0x3ff)
 490                         w04 = 0x400;
 491
 492                 EXIT_RC(WR16(s, 0x0c20036, w04));
 493                 s->config.w9C &= ~2;
 494                 EXIT_RC(WR16(s, 0x0c20015, s->config.w9C));
 495                 EXIT_RC(RD16(s, 0x0c20010));
 496                 rc &= 0xbfdf;
 497                 EXIT_RC(WR16(s, 0x0c20010, rc));
 498                 EXIT_RC(RD16(s, 0x0c20013));
 499                 rc &= ~2;
 500                 break;
 501         case 0:
 502                 /* loc_8000659 */
 503                 s->config.w9C &= ~2;
 504                 EXIT_RC(WR16(s, 0x0c20015, s->config.w9C));
 505                 EXIT_RC(RD16(s, 0x0c20010));
 506                 rc &= 0xbfdf;
 507                 rc |= 0x4000;
 508                 EXIT_RC(WR16(s, 0x0c20010, rc));
 509                 EXIT_RC(WR16(s, 0x0c20051, (w06 >> 4) & 0x3f));
 510                 EXIT_RC(RD16(s, 0x0c20013));
 511                 rc &= ~2;
 512                 break;
 513         default:
 514                 s->config.w9C |= 2;
 515                 EXIT_RC(WR16(s, 0x0c20015, s->config.w9C));
 516                 EXIT_RC(RD16(s, 0x0c20010));
 517                 rc &= 0xbfdf;
 518                 EXIT_RC(WR16(s, 0x0c20010, rc));
 519
 520                 EXIT_RC(WR16(s, 0x0c20036, 0));
 521
 522                 EXIT_RC(RD16(s, 0x0c20013));
 523                 rc |= 2;
 524         }
 525         rc = WR16(s, 0x0c20013, rc);
 526
 527 exit_rc:
 528         return rc;
 529 }
 530
 531 static int GetLockStatus(struct drx397xD_state *s, int *lockstat)
 532 {
 533         int rc;
 534
 535         *lockstat = 0;
 536
 537         rc = RD16(s, 0x082004b);
 538         if (rc < 0)
 539                 return rc;
 540
 541         if (s->config.d60 != 2)
 542                 return 0;
 543
 544         if ((rc & 7) == 7)
 545                 *lockstat |= 1;
 546         if ((rc & 3) == 3)
 547                 *lockstat |= 2;
 548         if (rc & 1)
 549                 *lockstat |= 4;
 550         return 0;
 551 }
 552
 553 static int CorrectSysClockDeviation(struct drx397xD_state *s)
 554 {
 555         int rc = -EINVAL;
 556         int lockstat;
 557         u32 clk, clk_limit;
 558
 559         pr_debug("%s\n", __func__);
 560
 561         if (s->config.d5C == 0) {
 562                 EXIT_RC(WR16(s, 0x08200e8, 0x010));
 563                 EXIT_RC(WR16(s, 0x08200e9, 0x113));
 564                 s->config.d5C = 1;
 565                 return rc;
 566         }
 567         if (s->config.d5C != 1)
 568                 goto exit_rc;
 569
 570         rc = RD16(s, 0x0820048);
 571
 572         rc = GetLockStatus(s, &lockstat);
 573         if (rc < 0)
 574                 goto exit_rc;
 575         if ((lockstat & 1) == 0)
 576                 goto exit_rc;
 577
 578         EXIT_RC(WR16(s, 0x0420033, 0x200));
 579         EXIT_RC(WR16(s, 0x0420034, 0xc5));
 580         EXIT_RC(WR16(s, 0x0420035, 0x10));
 581         EXIT_RC(WR16(s, 0x0420036, 0x1));
 582         EXIT_RC(WR16(s, 0x0420037, 0xa));
 583         EXIT_RC(HI_Command(s, 6));
 584         EXIT_RC(RD16(s, 0x0420040));
 585         clk = rc;
 586         EXIT_RC(RD16(s, 0x0420041));
 587         clk |= rc << 16;
 588
 589         if (clk <= 0x26ffff)
 590                 goto exit_rc;
 591         if (clk > 0x610000)
 592                 goto exit_rc;
 593
 594         if (!s->bandwidth_parm)
 595                 return -EINVAL;
 596
 597         /* round & convert to Hz */
 598         clk = ((u64) (clk + 0x800000) * s->bandwidth_parm + (1 << 20)) >> 21;
 599         clk_limit = s->config.f_osc * MAX_CLOCK_DRIFT / 1000;
 600
 601         if (clk - s->config.f_osc * 1000 + clk_limit <= 2 * clk_limit) {
 602                 s->f_osc = clk;
 603                 pr_debug("%s: osc %d %d [Hz]\n", __func__,
 604                          s->config.f_osc * 1000, clk - s->config.f_osc * 1000);
 605         }
 606         rc = WR16(s, 0x08200e8, 0);
 607
 608 exit_rc:
 609         return rc;
 610 }
 611
 612 static int ConfigureMPEGOutput(struct drx397xD_state *s, int type)
 613 {
 614         int rc, si, bp;
 615
 616         pr_debug("%s\n", __func__);
 617
 618         si = s->config.wA0;
 619         if (s->config.w98 == 0) {
 620                 si |= 1;
 621                 bp = 0;
 622         } else {
 623                 si &= ~1;
 624                 bp = 0x200;
 625         }
 626         if (s->config.w9A == 0)
 627                 si |= 0x80;
 628         else
 629                 si &= ~0x80;
 630
 631         EXIT_RC(WR16(s, 0x2150045, 0));
 632         EXIT_RC(WR16(s, 0x2150010, si));
 633         EXIT_RC(WR16(s, 0x2150011, bp));
 634         rc = WR16(s, 0x2150012, (type == 0 ? 0xfff : 0));
 635
 636 exit_rc:
 637         return rc;
 638 }
 639
 640 static int drx_tune(struct drx397xD_state *s,
 641                     struct dvb_frontend_parameters *fep)
 642 {
 643         u16 v22 = 0;
 644         u16 v1C = 0;
 645         u16 v1A = 0;
 646         u16 v18 = 0;
 647         u32 edi = 0, ebx = 0, ebp = 0, edx = 0;
 648         u16 v20 = 0, v1E = 0, v16 = 0, v14 = 0, v12 = 0, v10 = 0, v0E = 0;
 649
 650         int rc, df_tuner = 0;
 651         int a, b, c, d;
 652         pr_debug("%s %d\n", __func__, s->config.d60);
 653
 654         if (s->config.d60 != 2)
 655                 goto set_tuner;
 656         rc = CorrectSysClockDeviation(s);
 657         if (rc < 0)
 658                 goto set_tuner;
 659
 660         s->config.d60 = 1;
 661         rc = ConfigureMPEGOutput(s, 0);
 662         if (rc < 0)
 663                 goto set_tuner;
 664 set_tuner:
 665
 666         rc = PLL_Set(s, fep, &df_tuner);
 667         if (rc < 0) {
 668                 printk(KERN_ERR "Error in pll_set\n");
 669                 goto exit_rc;
 670         }
 671         msleep(200);
 672
 673         a = rc = RD16(s, 0x2150016);
 674         if (rc < 0)
 675                 goto exit_rc;
 676         b = rc = RD16(s, 0x2150010);
 677         if (rc < 0)
 678                 goto exit_rc;
 679         c = rc = RD16(s, 0x2150034);
 680         if (rc < 0)
 681                 goto exit_rc;
 682         d = rc = RD16(s, 0x2150035);
 683         if (rc < 0)
 684                 goto exit_rc;
 685         rc = WR16(s, 0x2150014, c);
 686         rc = WR16(s, 0x2150015, d);
 687         rc = WR16(s, 0x2150010, 0);
 688         rc = WR16(s, 0x2150000, 2);
 689         rc = WR16(s, 0x2150036, 0x0fff);
 690         rc = WR16(s, 0x2150016, a);
 691
 692         rc = WR16(s, 0x2150010, 2);
 693         rc = WR16(s, 0x2150007, 0);
 694         rc = WR16(s, 0x2150000, 1);
 695         rc = WR16(s, 0x2110000, 0);
 696         rc = WR16(s, 0x0800000, 0);
 697         rc = WR16(s, 0x2800000, 0);
 698         rc = WR16(s, 0x2110010, 0x664);
 699
 700         rc = write_fw(s, DRXD_ResetECRAM);
 701         rc = WR16(s, 0x2110000, 1);
 702
 703         rc = write_fw(s, DRXD_InitSC);
 704         if (rc < 0)
 705                 goto exit_rc;
 706
 707         rc = SetCfgIfAgc(s, &s->config.ifagc);
 708         if (rc < 0)
 709                 goto exit_rc;
 710
 711         rc = SetCfgRfAgc(s, &s->config.rfagc);
 712         if (rc < 0)
 713                 goto exit_rc;
 714
 715         if (fep->u.ofdm.transmission_mode != TRANSMISSION_MODE_2K)
 716                 v22 = 1;
 717         switch (fep->u.ofdm.transmission_mode) {
 718         case TRANSMISSION_MODE_8K:
 719                 edi = 1;
 720                 if (s->chip_rev == DRXD_FW_B1)
 721                         break;
 722
 723                 rc = WR16(s, 0x2010010, 0);
 724                 if (rc < 0)
 725                         break;
 726                 v1C = 0x63;
 727                 v1A = 0x53;
 728                 v18 = 0x43;
 729                 break;
 730         default:
 731                 edi = 0;
 732                 if (s->chip_rev == DRXD_FW_B1)
 733                         break;
 734
 735                 rc = WR16(s, 0x2010010, 1);
 736                 if (rc < 0)
 737                         break;
 738
 739                 v1C = 0x61;
 740                 v1A = 0x47;
 741                 v18 = 0x41;
 742         }
 743
 744         switch (fep->u.ofdm.guard_interval) {
 745         case GUARD_INTERVAL_1_4:
 746                 edi |= 0x0c;
 747                 break;
 748         case GUARD_INTERVAL_1_8:
 749                 edi |= 0x08;
 750                 break;
 751         case GUARD_INTERVAL_1_16:
 752                 edi |= 0x04;
 753                 break;
 754         case GUARD_INTERVAL_1_32:
 755                 break;
 756         default:
 757                 v22 |= 2;
 758         }
 759
 760         ebx = 0;
 761         ebp = 0;
 762         v20 = 0;
 763         v1E = 0;
 764         v16 = 0;
 765         v14 = 0;
 766         v12 = 0;
 767         v10 = 0;
 768         v0E = 0;
 769
 770         switch (fep->u.ofdm.hierarchy_information) {
 771         case HIERARCHY_1:
 772                 edi |= 0x40;
 773                 if (s->chip_rev == DRXD_FW_B1)
 774                         break;
 775                 rc = WR16(s, 0x1c10047, 1);
 776                 if (rc < 0)
 777                         goto exit_rc;
 778                 rc = WR16(s, 0x2010012, 1);
 779                 if (rc < 0)
 780                         goto exit_rc;
 781                 ebx = 0x19f;
 782                 ebp = 0x1fb;
 783                 v20 = 0x0c0;
 784                 v1E = 0x195;
 785                 v16 = 0x1d6;
 786                 v14 = 0x1ef;
 787                 v12 = 4;
 788                 v10 = 5;
 789                 v0E = 5;
 790                 break;
 791         case HIERARCHY_2:
 792                 edi |= 0x80;
 793                 if (s->chip_rev == DRXD_FW_B1)
 794                         break;
 795                 rc = WR16(s, 0x1c10047, 2);
 796                 if (rc < 0)
 797                         goto exit_rc;
 798                 rc = WR16(s, 0x2010012, 2);
 799                 if (rc < 0)
 800                         goto exit_rc;
 801                 ebx = 0x08f;
 802                 ebp = 0x12f;
 803                 v20 = 0x0c0;
 804                 v1E = 0x11e;
 805                 v16 = 0x1d6;
 806                 v14 = 0x15e;
 807                 v12 = 4;
 808                 v10 = 5;
 809                 v0E = 5;
 810                 break;
 811         case HIERARCHY_4:
 812                 edi |= 0xc0;
 813                 if (s->chip_rev == DRXD_FW_B1)
 814                         break;
 815                 rc = WR16(s, 0x1c10047, 3);
 816                 if (rc < 0)
 817                         goto exit_rc;
 818                 rc = WR16(s, 0x2010012, 3);
 819                 if (rc < 0)
 820                         goto exit_rc;
 821                 ebx = 0x14d;
 822                 ebp = 0x197;
 823                 v20 = 0x0c0;
 824                 v1E = 0x1ce;
 825                 v16 = 0x1d6;
 826                 v14 = 0x11a;
 827                 v12 = 4;
 828                 v10 = 6;
 829                 v0E = 5;
 830                 break;
 831         default:
 832                 v22 |= 8;
 833                 if (s->chip_rev == DRXD_FW_B1)
 834                         break;
 835                 rc = WR16(s, 0x1c10047, 0);
 836                 if (rc < 0)
 837                         goto exit_rc;
 838                 rc = WR16(s, 0x2010012, 0);
 839                 if (rc < 0)
 840                         goto exit_rc;
 841                                 /* QPSK    QAM16  QAM64 */
 842                 ebx = 0x19f;    /*                 62   */
 843                 ebp = 0x1fb;    /*                 15   */
 844                 v20 = 0x16a;    /*  62                  */
 845                 v1E = 0x195;    /*         62           */
 846                 v16 = 0x1bb;    /*  15                  */
 847                 v14 = 0x1ef;    /*         15           */
 848                 v12 = 5;        /*  16                  */
 849                 v10 = 5;        /*         16           */
 850                 v0E = 5;        /*                 16   */
 851         }
 852
 853         switch (fep->u.ofdm.constellation) {
 854         default:
 855                 v22 |= 4;
 856         case QPSK:
 857                 if (s->chip_rev == DRXD_FW_B1)
 858                         break;
 859
 860                 rc = WR16(s, 0x1c10046, 0);
 861                 if (rc < 0)
 862                         goto exit_rc;
 863                 rc = WR16(s, 0x2010011, 0);
 864                 if (rc < 0)
 865                         goto exit_rc;
 866                 rc = WR16(s, 0x201001a, 0x10);
 867                 if (rc < 0)
 868                         goto exit_rc;
 869                 rc = WR16(s, 0x201001b, 0);
 870                 if (rc < 0)
 871                         goto exit_rc;
 872                 rc = WR16(s, 0x201001c, 0);
 873                 if (rc < 0)
 874                         goto exit_rc;
 875                 rc = WR16(s, 0x1c10062, v20);
 876                 if (rc < 0)
 877                         goto exit_rc;
 878                 rc = WR16(s, 0x1c1002a, v1C);
 879                 if (rc < 0)
 880                         goto exit_rc;
 881                 rc = WR16(s, 0x1c10015, v16);
 882                 if (rc < 0)
 883                         goto exit_rc;
 884                 rc = WR16(s, 0x1c10016, v12);
 885                 if (rc < 0)
 886                         goto exit_rc;
 887                 break;
 888         case QAM_16:
 889                 edi |= 0x10;
 890                 if (s->chip_rev == DRXD_FW_B1)
 891                         break;
 892
 893                 rc = WR16(s, 0x1c10046, 1);
 894                 if (rc < 0)
 895                         goto exit_rc;
 896                 rc = WR16(s, 0x2010011, 1);
 897                 if (rc < 0)
 898                         goto exit_rc;
 899                 rc = WR16(s, 0x201001a, 0x10);
 900                 if (rc < 0)
 901                         goto exit_rc;
 902                 rc = WR16(s, 0x201001b, 4);
 903                 if (rc < 0)
 904                         goto exit_rc;
 905                 rc = WR16(s, 0x201001c, 0);
 906                 if (rc < 0)
 907                         goto exit_rc;
 908                 rc = WR16(s, 0x1c10062, v1E);
 909                 if (rc < 0)
 910                         goto exit_rc;
 911                 rc = WR16(s, 0x1c1002a, v1A);
 912                 if (rc < 0)
 913                         goto exit_rc;
 914                 rc = WR16(s, 0x1c10015, v14);
 915                 if (rc < 0)
 916                         goto exit_rc;
 917                 rc = WR16(s, 0x1c10016, v10);
 918                 if (rc < 0)
 919                         goto exit_rc;
 920                 break;
 921         case QAM_64:
 922                 edi |= 0x20;
 923                 rc = WR16(s, 0x1c10046, 2);
 924                 if (rc < 0)
 925                         goto exit_rc;
 926                 rc = WR16(s, 0x2010011, 2);
 927                 if (rc < 0)
 928                         goto exit_rc;
 929                 rc = WR16(s, 0x201001a, 0x20);
 930                 if (rc < 0)
 931                         goto exit_rc;
 932                 rc = WR16(s, 0x201001b, 8);
 933                 if (rc < 0)
 934                         goto exit_rc;
 935                 rc = WR16(s, 0x201001c, 2);
 936                 if (rc < 0)
 937                         goto exit_rc;
 938                 rc = WR16(s, 0x1c10062, ebx);
 939                 if (rc < 0)
 940                         goto exit_rc;
 941                 rc = WR16(s, 0x1c1002a, v18);
 942                 if (rc < 0)
 943                         goto exit_rc;
 944                 rc = WR16(s, 0x1c10015, ebp);
 945                 if (rc < 0)
 946                         goto exit_rc;
 947                 rc = WR16(s, 0x1c10016, v0E);
 948                 if (rc < 0)
 949                         goto exit_rc;
 950                 break;
 951         }
 952
 953         if (s->config.s20d24 == 1) {
 954                 rc = WR16(s, 0x2010013, 0);
 955         } else {
 956                 rc = WR16(s, 0x2010013, 1);
 957                 edi |= 0x1000;
 958         }
 959
 960         switch (fep->u.ofdm.code_rate_HP) {
 961         default:
 962                 v22 |= 0x10;
 963         case FEC_1_2:
 964                 if (s->chip_rev == DRXD_FW_B1)
 965                         break;
 966                 rc = WR16(s, 0x2090011, 0);
 967                 break;
 968         case FEC_2_3:
 969                 edi |= 0x200;
 970                 if (s->chip_rev == DRXD_FW_B1)
 971                         break;
 972                 rc = WR16(s, 0x2090011, 1);
 973                 break;
 974         case FEC_3_4:
 975                 edi |= 0x400;
 976                 if (s->chip_rev == DRXD_FW_B1)
 977                         break;
 978                 rc = WR16(s, 0x2090011, 2);
 979                 break;
 980         case FEC_5_6:           /* 5 */
 981                 edi |= 0x600;
 982                 if (s->chip_rev == DRXD_FW_B1)
 983                         break;
 984                 rc = WR16(s, 0x2090011, 3);
 985                 break;
 986         case FEC_7_8:           /* 7 */
 987                 edi |= 0x800;
 988                 if (s->chip_rev == DRXD_FW_B1)
 989                         break;
 990                 rc = WR16(s, 0x2090011, 4);
 991                 break;
 992         };
 993         if (rc < 0)
 994                 goto exit_rc;
 995
 996         switch (fep->u.ofdm.bandwidth) {
 997         default:
 998                 rc = -EINVAL;
 999                 goto exit_rc;
1000         case BANDWIDTH_8_MHZ:   /* 0 */
1001         case BANDWIDTH_AUTO:
1002                 rc = WR16(s, 0x0c2003f, 0x32);
1003                 s->bandwidth_parm = ebx = 0x8b8249;
1004                 edx = 0;
1005                 break;
1006         case BANDWIDTH_7_MHZ:
1007                 rc = WR16(s, 0x0c2003f, 0x3b);
1008                 s->bandwidth_parm = ebx = 0x7a1200;
1009                 edx = 0x4807;
1010                 break;
1011         case BANDWIDTH_6_MHZ:
1012                 rc = WR16(s, 0x0c2003f, 0x47);
1013                 s->bandwidth_parm = ebx = 0x68a1b6;
1014                 edx = 0x0f07;
1015                 break;
1016         };
1017
1018         if (rc < 0)
1019                 goto exit_rc;
1020
1021         rc = WR16(s, 0x08200ec, edx);
1022         if (rc < 0)
1023                 goto exit_rc;
1024
1025         rc = RD16(s, 0x0820050);
1026         if (rc < 0)
1027                 goto exit_rc;
1028         rc = WR16(s, 0x0820050, rc);
1029
1030         {
1031                 /* Configure bandwidth specific factor */
1032                 ebx = div64_u64(((u64) (s->f_osc) << 21) + (ebx >> 1),
1033                                      (u64)ebx) - 0x800000;
1034                 EXIT_RC(WR16(s, 0x0c50010, ebx & 0xffff));
1035                 EXIT_RC(WR16(s, 0x0c50011, ebx >> 16));
1036
1037                 /* drx397xD oscillator calibration */
1038                 ebx = div64_u64(((u64) (s->config.f_if + df_tuner) << 28) +
1039                                      (s->f_osc >> 1), (u64)s->f_osc);
1040         }
1041         ebx &= 0xfffffff;
1042         if (fep->inversion == INVERSION_ON)
1043                 ebx = 0x10000000 - ebx;
1044
1045         EXIT_RC(WR16(s, 0x0c30010, ebx & 0xffff));
1046         EXIT_RC(WR16(s, 0x0c30011, ebx >> 16));
1047
1048         EXIT_RC(WR16(s, 0x0800000, 1));
1049         EXIT_RC(RD16(s, 0x0800000));
1050
1051
1052         EXIT_RC(SC_WaitForReady(s));
1053         EXIT_RC(WR16(s, 0x0820042, 0));
1054         EXIT_RC(WR16(s, 0x0820041, v22));
1055         EXIT_RC(WR16(s, 0x0820040, edi));
1056         EXIT_RC(SC_SendCommand(s, 3));
1057
1058         rc = RD16(s, 0x0800000);
1059
1060         SC_WaitForReady(s);
1061         WR16(s, 0x0820042, 0);
1062         WR16(s, 0x0820041, 1);
1063         WR16(s, 0x0820040, 1);
1064         SC_SendCommand(s, 1);
1065
1066
1067         rc = WR16(s, 0x2150000, 2);
1068         rc = WR16(s, 0x2150016, a);
1069         rc = WR16(s, 0x2150010, 4);
1070         rc = WR16(s, 0x2150036, 0);
1071         rc = WR16(s, 0x2150000, 1);
1072         s->config.d60 = 2;
1073
1074 exit_rc:
1075         return rc;
1076 }
1077
1078 /*******************************************************************************
1079  * DVB interface
1080  ******************************************************************************/
1081
1082 static int drx397x_init(struct dvb_frontend *fe)
1083 {
1084         struct drx397xD_state *s = fe->demodulator_priv;
1085         int rc;
1086
1087         pr_debug("%s\n", __func__);
1088
1089         s->config.rfagc.d00 = 2;        /* 0x7c */
1090         s->config.rfagc.w04 = 0;
1091         s->config.rfagc.w06 = 0x3ff;
1092
1093         s->config.ifagc.d00 = 0;        /* 0x68 */
1094         s->config.ifagc.w04 = 0;
1095         s->config.ifagc.w06 = 140;
1096         s->config.ifagc.w08 = 0;
1097         s->config.ifagc.w0A = 0x3ff;
1098         s->config.ifagc.w0C = 0x388;
1099
1100         /* for signal strenght calculations */
1101         s->config.ss76 = 820;
1102         s->config.ss78 = 2200;
1103         s->config.ss7A = 150;
1104
1105         /* HI_CfgCommand */
1106         s->config.w50 = 4;
1107         s->config.w52 = 9;
1108
1109         s->config.f_if = 42800000;      /* d14: intermediate frequency [Hz] */
1110         s->config.f_osc = 48000;        /* s66 : oscillator frequency [kHz] */
1111         s->config.w92 = 12000;
1112
1113         s->config.w9C = 0x000e;
1114         s->config.w9E = 0x0000;
1115
1116         /* ConfigureMPEGOutput params */
1117         s->config.wA0 = 4;
1118         s->config.w98 = 1;
1119         s->config.w9A = 1;
1120
1121         /* get chip revision */
1122         rc = RD16(s, 0x2410019);
1123         if (rc < 0)
1124                 return -ENODEV;
1125
1126         if (rc == 0) {
1127                 printk(KERN_INFO "%s: chip revision A2\n", mod_name);
1128                 rc = drx_load_fw(s, DRXD_FW_A2);
1129         } else {
1130
1131                 rc = (rc >> 12) - 3;
1132                 switch (rc) {
1133                 case 1:
1134                         s->flags |= F_SET_0D4h;
1135                 case 0:
1136                 case 4:
1137                         s->flags |= F_SET_0D0h;
1138                         break;
1139                 case 2:
1140                 case 5:
1141                         break;
1142                 case 3:
1143                         s->flags |= F_SET_0D4h;
1144                         break;
1145                 default:
1146                         return -ENODEV;
1147                 };
1148                 printk(KERN_INFO "%s: chip revision B1.%d\n", mod_name, rc);
1149                 rc = drx_load_fw(s, DRXD_FW_B1);
1150         }
1151         if (rc < 0)
1152                 goto error;
1153
1154         rc = WR16(s, 0x0420033, 0x3973);
1155         if (rc < 0)
1156                 goto error;
1157
1158         rc = HI_Command(s, 2);
1159
1160         msleep(1);
1161
1162         if (s->chip_rev == DRXD_FW_A2) {
1163                 rc = WR16(s, 0x043012d, 0x47F);
1164                 if (rc < 0)
1165                         goto error;
1166         }
1167         rc = WR16_E0(s, 0x0400000, 0);
1168         if (rc < 0)
1169                 goto error;
1170
1171         if (s->config.w92 > 20000 || s->config.w92 % 4000) {
1172                 printk(KERN_ERR "%s: invalid osc frequency\n", mod_name);
1173                 rc = -1;
1174                 goto error;
1175         }
1176
1177         rc = WR16(s, 0x2410010, 1);
1178         if (rc < 0)
1179                 goto error;
1180         rc = WR16(s, 0x2410011, 0x15);
1181         if (rc < 0)
1182                 goto error;
1183         rc = WR16(s, 0x2410012, s->config.w92 / 4000);
1184         if (rc < 0)
1185                 goto error;
1186 #ifdef ORIG_FW
1187         rc = WR16(s, 0x2410015, 2);
1188         if (rc < 0)
1189                 goto error;
1190 #endif
1191         rc = WR16(s, 0x2410017, 0x3973);
1192         if (rc < 0)
1193                 goto error;
1194
1195         s->f_osc = s->config.f_osc * 1000;      /* initial estimator */
1196
1197         s->config.w56 = 1;
1198
1199         rc = HI_CfgCommand(s);
1200         if (rc < 0)
1201                 goto error;
1202
1203         rc = write_fw(s, DRXD_InitAtomicRead);
1204         if (rc < 0)
1205                 goto error;
1206
1207         if (s->chip_rev == DRXD_FW_A2) {
1208                 rc = WR16(s, 0x2150013, 0);
1209                 if (rc < 0)
1210                         goto error;
1211         }
1212
1213         rc = WR16_E0(s, 0x0400002, 0);
1214         if (rc < 0)
1215                 goto error;
1216         rc = WR16(s, 0x0400002, 0);
1217         if (rc < 0)
1218                 goto error;
1219
1220         if (s->chip_rev == DRXD_FW_A2) {
1221                 rc = write_fw(s, DRXD_ResetCEFR);
1222                 if (rc < 0)
1223                         goto error;
1224         }
1225         rc = write_fw(s, DRXD_microcode);
1226         if (rc < 0)
1227                 goto error;
1228
1229         s->config.w9C = 0x0e;
1230         if (s->flags & F_SET_0D0h) {
1231                 s->config.w9C = 0;
1232                 rc = RD16(s, 0x0c20010);
1233                 if (rc < 0)
1234                         goto write_DRXD_InitFE_1;
1235
1236                 rc &= ~0x1000;
1237                 rc = WR16(s, 0x0c20010, rc);
1238                 if (rc < 0)
1239                         goto write_DRXD_InitFE_1;
1240
1241                 rc = RD16(s, 0x0c20011);
1242                 if (rc < 0)
1243                         goto write_DRXD_InitFE_1;
1244
1245                 rc &= ~0x8;
1246                 rc = WR16(s, 0x0c20011, rc);
1247                 if (rc < 0)
1248                         goto write_DRXD_InitFE_1;
1249
1250                 rc = WR16(s, 0x0c20012, 1);
1251         }
1252
1253 write_DRXD_InitFE_1:
1254
1255         rc = write_fw(s, DRXD_InitFE_1);
1256         if (rc < 0)
1257                 goto error;
1258
1259         rc = 1;
1260         if (s->chip_rev == DRXD_FW_B1) {
1261                 if (s->flags & F_SET_0D0h)
1262                         rc = 0;
1263         } else {
1264                 if (s->flags & F_SET_0D0h)
1265                         rc = 4;
1266         }
1267
1268         rc = WR16(s, 0x0C20012, rc);
1269         if (rc < 0)
1270                 goto error;
1271
1272         rc = WR16(s, 0x0C20013, s->config.w9E);
1273         if (rc < 0)
1274                 goto error;
1275         rc = WR16(s, 0x0C20015, s->config.w9C);
1276         if (rc < 0)
1277                 goto error;
1278
1279         rc = write_fw(s, DRXD_InitFE_2);
1280         if (rc < 0)
1281                 goto error;
1282         rc = write_fw(s, DRXD_InitFT);
1283         if (rc < 0)
1284                 goto error;
1285         rc = write_fw(s, DRXD_InitCP);
1286         if (rc < 0)
1287                 goto error;
1288         rc = write_fw(s, DRXD_InitCE);
1289         if (rc < 0)
1290                 goto error;
1291         rc = write_fw(s, DRXD_InitEQ);
1292         if (rc < 0)
1293                 goto error;
1294         rc = write_fw(s, DRXD_InitEC);
1295         if (rc < 0)
1296                 goto error;
1297         rc = write_fw(s, DRXD_InitSC);
1298         if (rc < 0)
1299                 goto error;
1300
1301         rc = SetCfgIfAgc(s, &s->config.ifagc);
1302         if (rc < 0)
1303                 goto error;
1304
1305         rc = SetCfgRfAgc(s, &s->config.rfagc);
1306         if (rc < 0)
1307                 goto error;
1308
1309         rc = ConfigureMPEGOutput(s, 1);
1310         rc = WR16(s, 0x08201fe, 0x0017);
1311         rc = WR16(s, 0x08201ff, 0x0101);
1312
1313         s->config.d5C = 0;
1314         s->config.d60 = 1;
1315         s->config.d48 = 1;
1316
1317 error:
1318         return rc;
1319 }
1320
1321 static int drx397x_get_frontend(struct dvb_frontend *fe,
1322                                 struct dvb_frontend_parameters *params)
1323 {
1324         return 0;
1325 }
1326
1327 static int drx397x_set_frontend(struct dvb_frontend *fe,
1328                                 struct dvb_frontend_parameters *params)
1329 {
1330         struct drx397xD_state *s = fe->demodulator_priv;
1331
1332         s->config.s20d24 = 1;
1333
1334         return drx_tune(s, params);
1335 }
1336
1337 static int drx397x_get_tune_settings(struct dvb_frontend *fe,
1338                                      struct dvb_frontend_tune_settings
1339                                      *fe_tune_settings)
1340 {
1341         fe_tune_settings->min_delay_ms = 10000;
1342         fe_tune_settings->step_size = 0;
1343         fe_tune_settings->max_drift = 0;
1344
1345         return 0;
1346 }
1347
1348 static int drx397x_read_status(struct dvb_frontend *fe, fe_status_t *status)
1349 {
1350         struct drx397xD_state *s = fe->demodulator_priv;
1351         int lockstat;
1352
1353         GetLockStatus(s, &lockstat);
1354
1355         *status = 0;
1356         if (lockstat & 2) {
1357                 CorrectSysClockDeviation(s);
1358                 ConfigureMPEGOutput(s, 1);
1359                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI;
1360         }
1361         if (lockstat & 4)
1362                 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
1363
1364         return 0;
1365 }
1366
1367 static int drx397x_read_ber(struct dvb_frontend *fe, unsigned int *ber)
1368 {
1369         *ber = 0;
1370
1371         return 0;
1372 }
1373
1374 static int drx397x_read_snr(struct dvb_frontend *fe, u16 *snr)
1375 {
1376         *snr = 0;
1377
1378         return 0;
1379 }
1380
1381 static int drx397x_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
1382 {
1383         struct drx397xD_state *s = fe->demodulator_priv;
1384         int rc;
1385
1386         if (s->config.ifagc.d00 == 2) {
1387                 *strength = 0xffff;
1388                 return 0;
1389         }
1390         rc = RD16(s, 0x0c20035);
1391         if (rc < 0) {
1392                 *strength = 0;
1393                 return 0;
1394         }
1395         rc &= 0x3ff;
1396         /* Signal strength is calculated using the following formula:
1397          *
1398          * a = 2200 * 150 / (2200 + 150);
1399          * a = a * 3300 /  (a + 820);
1400          * b = 2200 * 3300 / (2200 + 820);
1401          * c = (((b-a) * rc) >> 10  + a) << 4;
1402          * strength = ~c & 0xffff;
1403          *
1404          * The following does the same but with less rounding errors:
1405          */
1406         *strength = ~(7720 + (rc * 30744 >> 10));
1407
1408         return 0;
1409 }
1410
1411 static int drx397x_read_ucblocks(struct dvb_frontend *fe,
1412                                  unsigned int *ucblocks)
1413 {
1414         *ucblocks = 0;
1415
1416         return 0;
1417 }
1418
1419 static int drx397x_sleep(struct dvb_frontend *fe)
1420 {
1421         return 0;
1422 }
1423
1424 static void drx397x_release(struct dvb_frontend *fe)
1425 {
1426         struct drx397xD_state *s = fe->demodulator_priv;
1427         printk(KERN_INFO "%s: release demodulator\n", mod_name);
1428         if (s) {
1429                 drx_release_fw(s);
1430                 kfree(s);
1431         }
1432
1433 }
1434
1435 static struct dvb_frontend_ops drx397x_ops = {
1436
1437         .info = {
1438                  .name                  = "Micronas DRX397xD DVB-T Frontend",
1439                  .type                  = FE_OFDM,
1440                  .frequency_min         = 47125000,
1441                  .frequency_max         = 855250000,
1442                  .frequency_stepsize    = 166667,
1443                  .frequency_tolerance   = 0,
1444                  .caps =                                  /* 0x0C01B2EAE */
1445                          FE_CAN_FEC_1_2                 | /* = 0x2, */
1446                          FE_CAN_FEC_2_3                 | /* = 0x4, */
1447                          FE_CAN_FEC_3_4                 | /* = 0x8, */
1448                          FE_CAN_FEC_5_6                 | /* = 0x20, */
1449                          FE_CAN_FEC_7_8                 | /* = 0x80, */
1450                          FE_CAN_FEC_AUTO                | /* = 0x200, */
1451                          FE_CAN_QPSK                    | /* = 0x400, */
1452                          FE_CAN_QAM_16                  | /* = 0x800, */
1453                          FE_CAN_QAM_64                  | /* = 0x2000, */
1454                          FE_CAN_QAM_AUTO                | /* = 0x10000, */
1455                          FE_CAN_TRANSMISSION_MODE_AUTO  | /* = 0x20000, */
1456                          FE_CAN_GUARD_INTERVAL_AUTO     | /* = 0x80000, */
1457                          FE_CAN_HIERARCHY_AUTO          | /* = 0x100000, */
1458                          FE_CAN_RECOVER                 | /* = 0x40000000, */
1459                          FE_CAN_MUTE_TS                   /* = 0x80000000 */
1460          },
1461
1462         .release = drx397x_release,
1463         .init = drx397x_init,
1464         .sleep = drx397x_sleep,
1465
1466         .set_frontend = drx397x_set_frontend,
1467         .get_tune_settings = drx397x_get_tune_settings,
1468         .get_frontend = drx397x_get_frontend,
1469
1470         .read_status = drx397x_read_status,
1471         .read_snr = drx397x_read_snr,
1472         .read_signal_strength = drx397x_read_signal_strength,
1473         .read_ber = drx397x_read_ber,
1474         .read_ucblocks = drx397x_read_ucblocks,
1475 };
1476
1477 struct dvb_frontend *drx397xD_attach(const struct drx397xD_config *config,
1478                                      struct i2c_adapter *i2c)
1479 {
1480         struct drx397xD_state *state;
1481
1482         /* allocate memory for the internal state */
1483         state = kzalloc(sizeof(struct drx397xD_state), GFP_KERNEL);
1484         if (!state)
1485                 goto error;
1486
1487         /* setup the state */
1488         state->i2c = i2c;
1489         memcpy(&state->config, config, sizeof(struct drx397xD_config));
1490
1491         /* check if the demod is there */
1492         if (RD16(state, 0x2410019) < 0)
1493                 goto error;
1494
1495         /* create dvb_frontend */
1496         memcpy(&state->frontend.ops, &drx397x_ops,
1497                         sizeof(struct dvb_frontend_ops));
1498         state->frontend.demodulator_priv = state;
1499
1500         return &state->frontend;
1501 error:
1502         kfree(state);
1503
1504         return NULL;
1505 }
1506 EXPORT_SYMBOL(drx397xD_attach);
1507
1508 MODULE_DESCRIPTION("Micronas DRX397xD DVB-T Frontend");
1509 MODULE_AUTHOR("Henk Vergonet");
1510 MODULE_LICENSE("GPL");
1511