LXR linux/drivers/media/dvb-frontends/lgdt3306a.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *    Support for LGDT3306A - 8VSB/QAM-B
   4 *
   5 *    Copyright (C) 2013 Fred Richter <frichter@hauppauge.com>
   6 *    - driver structure based on lgdt3305.[ch] by Michael Krufky
   7 *    - code based on LG3306_V0.35 API by LG Electronics Inc.
   8 */
   9
  10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12#include <asm/div64.h>
  13#include <linux/kernel.h>
  14#include <linux/dvb/frontend.h>
  15#include <media/dvb_math.h>
  16#include "lgdt3306a.h"
  17#include <linux/i2c-mux.h>
  18
  19
  20static int debug;
  21module_param(debug, int, 0644);
  22MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
  23
  24/*
  25 * Older drivers treated QAM64 and QAM256 the same; that is the HW always
  26 * used "Auto" mode during detection.  Setting "forced_manual"=1 allows
  27 * the user to treat these modes as separate.  For backwards compatibility,
  28 * it's off by default.  QAM_AUTO can now be specified to achive that
  29 * effect even if "forced_manual"=1
  30 */
  31static int forced_manual;
  32module_param(forced_manual, int, 0644);
  33MODULE_PARM_DESC(forced_manual, "if set, QAM64 and QAM256 will only lock to modulation specified");
  34
  35#define DBG_INFO 1
  36#define DBG_REG  2
  37#define DBG_DUMP 4 /* FGR - comment out to remove dump code */
  38
  39#define lg_debug(fmt, arg...) \
  40        printk(KERN_DEBUG pr_fmt(fmt), ## arg)
  41
  42#define dbg_info(fmt, arg...)                                   \
  43        do {                                                    \
  44                if (debug & DBG_INFO)                           \
  45                        lg_debug(fmt, ## arg);                  \
  46        } while (0)
  47
  48#define dbg_reg(fmt, arg...)                                    \
  49        do {                                                    \
  50                if (debug & DBG_REG)                            \
  51                        lg_debug(fmt, ## arg);                  \
  52        } while (0)
  53
  54#define lg_chkerr(ret)                                                  \
  55({                                                                      \
  56        int __ret;                                                      \
  57        __ret = (ret < 0);                                              \
  58        if (__ret)                                                      \
  59                pr_err("error %d on line %d\n", ret, __LINE__);         \
  60        __ret;                                                          \
  61})
  62
  63struct lgdt3306a_state {
  64        struct i2c_adapter *i2c_adap;
  65        const struct lgdt3306a_config *cfg;
  66
  67        struct dvb_frontend frontend;
  68
  69        enum fe_modulation current_modulation;
  70        u32 current_frequency;
  71        u32 snr;
  72
  73        struct i2c_mux_core *muxc;
  74};
  75
  76/*
  77 * LG3306A Register Usage
  78 *  (LG does not really name the registers, so this code does not either)
  79 *
  80 * 0000 -> 00FF Common control and status
  81 * 1000 -> 10FF Synchronizer control and status
  82 * 1F00 -> 1FFF Smart Antenna control and status
  83 * 2100 -> 21FF VSB Equalizer control and status
  84 * 2800 -> 28FF QAM Equalizer control and status
  85 * 3000 -> 30FF FEC control and status
  86 */
  87
  88enum lgdt3306a_lock_status {
  89        LG3306_UNLOCK       = 0x00,
  90        LG3306_LOCK         = 0x01,
  91        LG3306_UNKNOWN_LOCK = 0xff
  92};
  93
  94enum lgdt3306a_neverlock_status {
  95        LG3306_NL_INIT    = 0x00,
  96        LG3306_NL_PROCESS = 0x01,
  97        LG3306_NL_LOCK    = 0x02,
  98        LG3306_NL_FAIL    = 0x03,
  99        LG3306_NL_UNKNOWN = 0xff
 100};
 101
 102enum lgdt3306a_modulation {
 103        LG3306_VSB          = 0x00,
 104        LG3306_QAM64        = 0x01,
 105        LG3306_QAM256       = 0x02,
 106        LG3306_UNKNOWN_MODE = 0xff
 107};
 108
 109enum lgdt3306a_lock_check {
 110        LG3306_SYNC_LOCK,
 111        LG3306_FEC_LOCK,
 112        LG3306_TR_LOCK,
 113        LG3306_AGC_LOCK,
 114};
 115
 116
 117#ifdef DBG_DUMP
 118static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state);
 119static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state);
 120#endif
 121
 122
 123static int lgdt3306a_write_reg(struct lgdt3306a_state *state, u16 reg, u8 val)
 124{
 125        int ret;
 126        u8 buf[] = { reg >> 8, reg & 0xff, val };
 127        struct i2c_msg msg = {
 128                .addr = state->cfg->i2c_addr, .flags = 0,
 129                .buf = buf, .len = 3,
 130        };
 131
 132        dbg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
 133
 134        ret = i2c_transfer(state->i2c_adap, &msg, 1);
 135
 136        if (ret != 1) {
 137                pr_err("error (addr %02x %02x <- %02x, err = %i)\n",
 138                       msg.buf[0], msg.buf[1], msg.buf[2], ret);
 139                if (ret < 0)
 140                        return ret;
 141                else
 142                        return -EREMOTEIO;
 143        }
 144        return 0;
 145}
 146
 147static int lgdt3306a_read_reg(struct lgdt3306a_state *state, u16 reg, u8 *val)
 148{
 149        int ret;
 150        u8 reg_buf[] = { reg >> 8, reg & 0xff };
 151        struct i2c_msg msg[] = {
 152                { .addr = state->cfg->i2c_addr,
 153                  .flags = 0, .buf = reg_buf, .len = 2 },
 154                { .addr = state->cfg->i2c_addr,
 155                  .flags = I2C_M_RD, .buf = val, .len = 1 },
 156        };
 157
 158        ret = i2c_transfer(state->i2c_adap, msg, 2);
 159
 160        if (ret != 2) {
 161                pr_err("error (addr %02x reg %04x error (ret == %i)\n",
 162                       state->cfg->i2c_addr, reg, ret);
 163                if (ret < 0)
 164                        return ret;
 165                else
 166                        return -EREMOTEIO;
 167        }
 168        dbg_reg("reg: 0x%04x, val: 0x%02x\n", reg, *val);
 169
 170        return 0;
 171}
 172
 173#define read_reg(state, reg)                                            \
 174({                                                                      \
 175        u8 __val;                                                       \
 176        int ret = lgdt3306a_read_reg(state, reg, &__val);               \
 177        if (lg_chkerr(ret))                                             \
 178                __val = 0;                                              \
 179        __val;                                                          \
 180})
 181
 182static int lgdt3306a_set_reg_bit(struct lgdt3306a_state *state,
 183                                u16 reg, int bit, int onoff)
 184{
 185        u8 val;
 186        int ret;
 187
 188        dbg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
 189
 190        ret = lgdt3306a_read_reg(state, reg, &val);
 191        if (lg_chkerr(ret))
 192                goto fail;
 193
 194        val &= ~(1 << bit);
 195        val |= (onoff & 1) << bit;
 196
 197        ret = lgdt3306a_write_reg(state, reg, val);
 198        lg_chkerr(ret);
 199fail:
 200        return ret;
 201}
 202
 203/* ------------------------------------------------------------------------ */
 204
 205static int lgdt3306a_soft_reset(struct lgdt3306a_state *state)
 206{
 207        int ret;
 208
 209        dbg_info("\n");
 210
 211        ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0);
 212        if (lg_chkerr(ret))
 213                goto fail;
 214
 215        msleep(20);
 216        ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1);
 217        lg_chkerr(ret);
 218
 219fail:
 220        return ret;
 221}
 222
 223static int lgdt3306a_mpeg_mode(struct lgdt3306a_state *state,
 224                                     enum lgdt3306a_mpeg_mode mode)
 225{
 226        u8 val;
 227        int ret;
 228
 229        dbg_info("(%d)\n", mode);
 230        /* transport packet format - TPSENB=0x80 */
 231        ret = lgdt3306a_set_reg_bit(state, 0x0071, 7,
 232                                     mode == LGDT3306A_MPEG_PARALLEL ? 1 : 0);
 233        if (lg_chkerr(ret))
 234                goto fail;
 235
 236        /*
 237         * start of packet signal duration
 238         * TPSSOPBITEN=0x40; 0=byte duration, 1=bit duration
 239         */
 240        ret = lgdt3306a_set_reg_bit(state, 0x0071, 6, 0);
 241        if (lg_chkerr(ret))
 242                goto fail;
 243
 244        ret = lgdt3306a_read_reg(state, 0x0070, &val);
 245        if (lg_chkerr(ret))
 246                goto fail;
 247
 248        val |= 0x10; /* TPCLKSUPB=0x10 */
 249
 250        if (mode == LGDT3306A_MPEG_PARALLEL)
 251                val &= ~0x10;
 252
 253        ret = lgdt3306a_write_reg(state, 0x0070, val);
 254        lg_chkerr(ret);
 255
 256fail:
 257        return ret;
 258}
 259
 260static int lgdt3306a_mpeg_mode_polarity(struct lgdt3306a_state *state,
 261                                       enum lgdt3306a_tp_clock_edge edge,
 262                                       enum lgdt3306a_tp_valid_polarity valid)
 263{
 264        u8 val;
 265        int ret;
 266
 267        dbg_info("edge=%d, valid=%d\n", edge, valid);
 268
 269        ret = lgdt3306a_read_reg(state, 0x0070, &val);
 270        if (lg_chkerr(ret))
 271                goto fail;
 272
 273        val &= ~0x06; /* TPCLKPOL=0x04, TPVALPOL=0x02 */
 274
 275        if (edge == LGDT3306A_TPCLK_RISING_EDGE)
 276                val |= 0x04;
 277        if (valid == LGDT3306A_TP_VALID_HIGH)
 278                val |= 0x02;
 279
 280        ret = lgdt3306a_write_reg(state, 0x0070, val);
 281        lg_chkerr(ret);
 282
 283fail:
 284        return ret;
 285}
 286
 287static int lgdt3306a_mpeg_tristate(struct lgdt3306a_state *state,
 288                                     int mode)
 289{
 290        u8 val;
 291        int ret;
 292
 293        dbg_info("(%d)\n", mode);
 294
 295        if (mode) {
 296                ret = lgdt3306a_read_reg(state, 0x0070, &val);
 297                if (lg_chkerr(ret))
 298                        goto fail;
 299                /*
 300                 * Tristate bus; TPOUTEN=0x80, TPCLKOUTEN=0x20,
 301                 * TPDATAOUTEN=0x08
 302                 */
 303                val &= ~0xa8;
 304                ret = lgdt3306a_write_reg(state, 0x0070, val);
 305                if (lg_chkerr(ret))
 306                        goto fail;
 307
 308                /* AGCIFOUTENB=0x40; 1=Disable IFAGC pin */
 309                ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 1);
 310                if (lg_chkerr(ret))
 311                        goto fail;
 312
 313        } else {
 314                /* enable IFAGC pin */
 315                ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 0);
 316                if (lg_chkerr(ret))
 317                        goto fail;
 318
 319                ret = lgdt3306a_read_reg(state, 0x0070, &val);
 320                if (lg_chkerr(ret))
 321                        goto fail;
 322
 323                val |= 0xa8; /* enable bus */
 324                ret = lgdt3306a_write_reg(state, 0x0070, val);
 325                if (lg_chkerr(ret))
 326                        goto fail;
 327        }
 328
 329fail:
 330        return ret;
 331}
 332
 333static int lgdt3306a_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
 334{
 335        struct lgdt3306a_state *state = fe->demodulator_priv;
 336
 337        dbg_info("acquire=%d\n", acquire);
 338
 339        return lgdt3306a_mpeg_tristate(state, acquire ? 0 : 1);
 340
 341}
 342
 343static int lgdt3306a_power(struct lgdt3306a_state *state,
 344                                     int mode)
 345{
 346        int ret;
 347
 348        dbg_info("(%d)\n", mode);
 349
 350        if (mode == 0) {
 351                /* into reset */
 352                ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0);
 353                if (lg_chkerr(ret))
 354                        goto fail;
 355
 356                /* power down */
 357                ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 0);
 358                if (lg_chkerr(ret))
 359                        goto fail;
 360
 361        } else {
 362                /* out of reset */
 363                ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1);
 364                if (lg_chkerr(ret))
 365                        goto fail;
 366
 367                /* power up */
 368                ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 1);
 369                if (lg_chkerr(ret))
 370                        goto fail;
 371        }
 372
 373#ifdef DBG_DUMP
 374        lgdt3306a_DumpAllRegs(state);
 375#endif
 376fail:
 377        return ret;
 378}
 379
 380
 381static int lgdt3306a_set_vsb(struct lgdt3306a_state *state)
 382{
 383        u8 val;
 384        int ret;
 385
 386        dbg_info("\n");
 387
 388        /* 0. Spectrum inversion detection manual; spectrum inverted */
 389        ret = lgdt3306a_read_reg(state, 0x0002, &val);
 390        val &= 0xf7; /* SPECINVAUTO Off */
 391        val |= 0x04; /* SPECINV On */
 392        ret = lgdt3306a_write_reg(state, 0x0002, val);
 393        if (lg_chkerr(ret))
 394                goto fail;
 395
 396        /* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
 397        ret = lgdt3306a_write_reg(state, 0x0008, 0x80);
 398        if (lg_chkerr(ret))
 399                goto fail;
 400
 401        /* 2. Bandwidth mode for VSB(6MHz) */
 402        ret = lgdt3306a_read_reg(state, 0x0009, &val);
 403        val &= 0xe3;
 404        val |= 0x0c; /* STDOPDETTMODE[2:0]=3 */
 405        ret = lgdt3306a_write_reg(state, 0x0009, val);
 406        if (lg_chkerr(ret))
 407                goto fail;
 408
 409        /* 3. QAM mode detection mode(None) */
 410        ret = lgdt3306a_read_reg(state, 0x0009, &val);
 411        val &= 0xfc; /* STDOPDETCMODE[1:0]=0 */
 412        ret = lgdt3306a_write_reg(state, 0x0009, val);
 413        if (lg_chkerr(ret))
 414                goto fail;
 415
 416        /* 4. ADC sampling frequency rate(2x sampling) */
 417        ret = lgdt3306a_read_reg(state, 0x000d, &val);
 418        val &= 0xbf; /* SAMPLING4XFEN=0 */
 419        ret = lgdt3306a_write_reg(state, 0x000d, val);
 420        if (lg_chkerr(ret))
 421                goto fail;
 422
 423#if 0
 424        /* FGR - disable any AICC filtering, testing only */
 425
 426        ret = lgdt3306a_write_reg(state, 0x0024, 0x00);
 427        if (lg_chkerr(ret))
 428                goto fail;
 429
 430        /* AICCFIXFREQ0 NT N-1(Video rejection) */
 431        ret = lgdt3306a_write_reg(state, 0x002e, 0x00);
 432        ret = lgdt3306a_write_reg(state, 0x002f, 0x00);
 433        ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
 434
 435        /* AICCFIXFREQ1 NT N-1(Audio rejection) */
 436        ret = lgdt3306a_write_reg(state, 0x002b, 0x00);
 437        ret = lgdt3306a_write_reg(state, 0x002c, 0x00);
 438        ret = lgdt3306a_write_reg(state, 0x002d, 0x00);
 439
 440        /* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
 441        ret = lgdt3306a_write_reg(state, 0x0028, 0x00);
 442        ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
 443        ret = lgdt3306a_write_reg(state, 0x002a, 0x00);
 444
 445        /* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
 446        ret = lgdt3306a_write_reg(state, 0x0025, 0x00);
 447        ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
 448        ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
 449
 450#else
 451        /* FGR - this works well for HVR-1955,1975 */
 452
 453        /* 5. AICCOPMODE  NT N-1 Adj. */
 454        ret = lgdt3306a_write_reg(state, 0x0024, 0x5A);
 455        if (lg_chkerr(ret))
 456                goto fail;
 457
 458        /* AICCFIXFREQ0 NT N-1(Video rejection) */
 459        ret = lgdt3306a_write_reg(state, 0x002e, 0x5A);
 460        ret = lgdt3306a_write_reg(state, 0x002f, 0x00);
 461        ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
 462
 463        /* AICCFIXFREQ1 NT N-1(Audio rejection) */
 464        ret = lgdt3306a_write_reg(state, 0x002b, 0x36);
 465        ret = lgdt3306a_write_reg(state, 0x002c, 0x00);
 466        ret = lgdt3306a_write_reg(state, 0x002d, 0x00);
 467
 468        /* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
 469        ret = lgdt3306a_write_reg(state, 0x0028, 0x2A);
 470        ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
 471        ret = lgdt3306a_write_reg(state, 0x002a, 0x00);
 472
 473        /* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
 474        ret = lgdt3306a_write_reg(state, 0x0025, 0x06);
 475        ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
 476        ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
 477#endif
 478
 479        ret = lgdt3306a_read_reg(state, 0x001e, &val);
 480        val &= 0x0f;
 481        val |= 0xa0;
 482        ret = lgdt3306a_write_reg(state, 0x001e, val);
 483
 484        ret = lgdt3306a_write_reg(state, 0x0022, 0x08);
 485
 486        ret = lgdt3306a_write_reg(state, 0x0023, 0xFF);
 487
 488        ret = lgdt3306a_read_reg(state, 0x211f, &val);
 489        val &= 0xef;
 490        ret = lgdt3306a_write_reg(state, 0x211f, val);
 491
 492        ret = lgdt3306a_write_reg(state, 0x2173, 0x01);
 493
 494        ret = lgdt3306a_read_reg(state, 0x1061, &val);
 495        val &= 0xf8;
 496        val |= 0x04;
 497        ret = lgdt3306a_write_reg(state, 0x1061, val);
 498
 499        ret = lgdt3306a_read_reg(state, 0x103d, &val);
 500        val &= 0xcf;
 501        ret = lgdt3306a_write_reg(state, 0x103d, val);
 502
 503        ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
 504
 505        ret = lgdt3306a_read_reg(state, 0x2141, &val);
 506        val &= 0x3f;
 507        ret = lgdt3306a_write_reg(state, 0x2141, val);
 508
 509        ret = lgdt3306a_read_reg(state, 0x2135, &val);
 510        val &= 0x0f;
 511        val |= 0x70;
 512        ret = lgdt3306a_write_reg(state, 0x2135, val);
 513
 514        ret = lgdt3306a_read_reg(state, 0x0003, &val);
 515        val &= 0xf7;
 516        ret = lgdt3306a_write_reg(state, 0x0003, val);
 517
 518        ret = lgdt3306a_read_reg(state, 0x001c, &val);
 519        val &= 0x7f;
 520        ret = lgdt3306a_write_reg(state, 0x001c, val);
 521
 522        /* 6. EQ step size */
 523        ret = lgdt3306a_read_reg(state, 0x2179, &val);
 524        val &= 0xf8;
 525        ret = lgdt3306a_write_reg(state, 0x2179, val);
 526
 527        ret = lgdt3306a_read_reg(state, 0x217a, &val);
 528        val &= 0xf8;
 529        ret = lgdt3306a_write_reg(state, 0x217a, val);
 530
 531        /* 7. Reset */
 532        ret = lgdt3306a_soft_reset(state);
 533        if (lg_chkerr(ret))
 534                goto fail;
 535
 536        dbg_info("complete\n");
 537fail:
 538        return ret;
 539}
 540
 541static int lgdt3306a_set_qam(struct lgdt3306a_state *state, int modulation)
 542{
 543        u8 val;
 544        int ret;
 545
 546        dbg_info("modulation=%d\n", modulation);
 547
 548        /* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
 549        ret = lgdt3306a_write_reg(state, 0x0008, 0x08);
 550        if (lg_chkerr(ret))
 551                goto fail;
 552
 553        /* 1a. Spectrum inversion detection to Auto */
 554        ret = lgdt3306a_read_reg(state, 0x0002, &val);
 555        val &= 0xfb; /* SPECINV Off */
 556        val |= 0x08; /* SPECINVAUTO On */
 557        ret = lgdt3306a_write_reg(state, 0x0002, val);
 558        if (lg_chkerr(ret))
 559                goto fail;
 560
 561        /* 2. Bandwidth mode for QAM */
 562        ret = lgdt3306a_read_reg(state, 0x0009, &val);
 563        val &= 0xe3; /* STDOPDETTMODE[2:0]=0 VSB Off */
 564        ret = lgdt3306a_write_reg(state, 0x0009, val);
 565        if (lg_chkerr(ret))
 566                goto fail;
 567
 568        /* 3. : 64QAM/256QAM detection(manual, auto) */
 569        ret = lgdt3306a_read_reg(state, 0x0009, &val);
 570        val &= 0xfc;
 571        /* Check for forced Manual modulation modes; otherwise always "auto" */
 572        if(forced_manual && (modulation != QAM_AUTO)){
 573                val |= 0x01; /* STDOPDETCMODE[1:0]= 1=Manual */
 574        } else {
 575                val |= 0x02; /* STDOPDETCMODE[1:0]= 2=Auto */
 576        }
 577        ret = lgdt3306a_write_reg(state, 0x0009, val);
 578        if (lg_chkerr(ret))
 579                goto fail;
 580
 581        /* 3a. : 64QAM/256QAM selection for manual */
 582        ret = lgdt3306a_read_reg(state, 0x101a, &val);
 583        val &= 0xf8;
 584        if (modulation == QAM_64)
 585                val |= 0x02; /* QMDQMODE[2:0]=2=QAM64 */
 586        else
 587                val |= 0x04; /* QMDQMODE[2:0]=4=QAM256 */
 588
 589        ret = lgdt3306a_write_reg(state, 0x101a, val);
 590        if (lg_chkerr(ret))
 591                goto fail;
 592
 593        /* 4. ADC sampling frequency rate(4x sampling) */
 594        ret = lgdt3306a_read_reg(state, 0x000d, &val);
 595        val &= 0xbf;
 596        val |= 0x40; /* SAMPLING4XFEN=1 */
 597        ret = lgdt3306a_write_reg(state, 0x000d, val);
 598        if (lg_chkerr(ret))
 599                goto fail;
 600
 601        /* 5. No AICC operation in QAM mode */
 602        ret = lgdt3306a_read_reg(state, 0x0024, &val);
 603        val &= 0x00;
 604        ret = lgdt3306a_write_reg(state, 0x0024, val);
 605        if (lg_chkerr(ret))
 606                goto fail;
 607
 608        /* 5.1 V0.36 SRDCHKALWAYS : For better QAM detection */
 609        ret = lgdt3306a_read_reg(state, 0x000a, &val);
 610        val &= 0xfd;
 611        val |= 0x02;
 612        ret = lgdt3306a_write_reg(state, 0x000a, val);
 613        if (lg_chkerr(ret))
 614                goto fail;
 615
 616        /* 5.2 V0.36 Control of "no signal" detector function */
 617        ret = lgdt3306a_read_reg(state, 0x2849, &val);
 618        val &= 0xdf;
 619        ret = lgdt3306a_write_reg(state, 0x2849, val);
 620        if (lg_chkerr(ret))
 621                goto fail;
 622
 623        /* 5.3 Fix for Blonder Tongue HDE-2H-QAM and AQM modulators */
 624        ret = lgdt3306a_read_reg(state, 0x302b, &val);
 625        val &= 0x7f;  /* SELFSYNCFINDEN_CQS=0; disable auto reset */
 626        ret = lgdt3306a_write_reg(state, 0x302b, val);
 627        if (lg_chkerr(ret))
 628                goto fail;
 629
 630        /* 6. Reset */
 631        ret = lgdt3306a_soft_reset(state);
 632        if (lg_chkerr(ret))
 633                goto fail;
 634
 635        dbg_info("complete\n");
 636fail:
 637        return ret;
 638}
 639
 640static int lgdt3306a_set_modulation(struct lgdt3306a_state *state,
 641                                   struct dtv_frontend_properties *p)
 642{
 643        int ret;
 644
 645        dbg_info("\n");
 646
 647        switch (p->modulation) {
 648        case VSB_8:
 649                ret = lgdt3306a_set_vsb(state);
 650                break;
 651        case QAM_64:
 652        case QAM_256:
 653        case QAM_AUTO:
 654                ret = lgdt3306a_set_qam(state, p->modulation);
 655                break;
 656        default:
 657                return -EINVAL;
 658        }
 659        if (lg_chkerr(ret))
 660                goto fail;
 661
 662        state->current_modulation = p->modulation;
 663
 664fail:
 665        return ret;
 666}
 667
 668/* ------------------------------------------------------------------------ */
 669
 670static int lgdt3306a_agc_setup(struct lgdt3306a_state *state,
 671                              struct dtv_frontend_properties *p)
 672{
 673        /* TODO: anything we want to do here??? */
 674        dbg_info("\n");
 675
 676        switch (p->modulation) {
 677        case VSB_8:
 678                break;
 679        case QAM_64:
 680        case QAM_256:
 681        case QAM_AUTO:
 682                break;
 683        default:
 684                return -EINVAL;
 685        }
 686        return 0;
 687}
 688
 689/* ------------------------------------------------------------------------ */
 690
 691static int lgdt3306a_set_inversion(struct lgdt3306a_state *state,
 692                                       int inversion)
 693{
 694        int ret;
 695
 696        dbg_info("(%d)\n", inversion);
 697
 698        ret = lgdt3306a_set_reg_bit(state, 0x0002, 2, inversion ? 1 : 0);
 699        return ret;
 700}
 701
 702static int lgdt3306a_set_inversion_auto(struct lgdt3306a_state *state,
 703                                       int enabled)
 704{
 705        int ret;
 706
 707        dbg_info("(%d)\n", enabled);
 708
 709        /* 0=Manual 1=Auto(QAM only) - SPECINVAUTO=0x04 */
 710        ret = lgdt3306a_set_reg_bit(state, 0x0002, 3, enabled);
 711        return ret;
 712}
 713
 714static int lgdt3306a_spectral_inversion(struct lgdt3306a_state *state,
 715                                       struct dtv_frontend_properties *p,
 716                                       int inversion)
 717{
 718        int ret = 0;
 719
 720        dbg_info("(%d)\n", inversion);
 721#if 0
 722        /*
 723         * FGR - spectral_inversion defaults already set for VSB and QAM;
 724         * can enable later if desired
 725         */
 726
 727        ret = lgdt3306a_set_inversion(state, inversion);
 728
 729        switch (p->modulation) {
 730        case VSB_8:
 731                /* Manual only for VSB */
 732                ret = lgdt3306a_set_inversion_auto(state, 0);
 733                break;
 734        case QAM_64:
 735        case QAM_256:
 736        case QAM_AUTO:
 737                /* Auto ok for QAM */
 738                ret = lgdt3306a_set_inversion_auto(state, 1);
 739                break;
 740        default:
 741                ret = -EINVAL;
 742        }
 743#endif
 744        return ret;
 745}
 746
 747static int lgdt3306a_set_if(struct lgdt3306a_state *state,
 748                           struct dtv_frontend_properties *p)
 749{
 750        int ret;
 751        u16 if_freq_khz;
 752        u8 nco1, nco2;
 753
 754        switch (p->modulation) {
 755        case VSB_8:
 756                if_freq_khz = state->cfg->vsb_if_khz;
 757                break;
 758        case QAM_64:
 759        case QAM_256:
 760        case QAM_AUTO:
 761                if_freq_khz = state->cfg->qam_if_khz;
 762                break;
 763        default:
 764                return -EINVAL;
 765        }
 766
 767        switch (if_freq_khz) {
 768        default:
 769                pr_warn("IF=%d KHz is not supported, 3250 assumed\n",
 770                        if_freq_khz);
 771                /* fallthrough */
 772        case 3250: /* 3.25Mhz */
 773                nco1 = 0x34;
 774                nco2 = 0x00;
 775                break;
 776        case 3500: /* 3.50Mhz */
 777                nco1 = 0x38;
 778                nco2 = 0x00;
 779                break;
 780        case 4000: /* 4.00Mhz */
 781                nco1 = 0x40;
 782                nco2 = 0x00;
 783                break;
 784        case 5000: /* 5.00Mhz */
 785                nco1 = 0x50;
 786                nco2 = 0x00;
 787                break;
 788        case 5380: /* 5.38Mhz */
 789                nco1 = 0x56;
 790                nco2 = 0x14;
 791                break;
 792        }
 793        ret = lgdt3306a_write_reg(state, 0x0010, nco1);
 794        if (ret)
 795                return ret;
 796        ret = lgdt3306a_write_reg(state, 0x0011, nco2);
 797        if (ret)
 798                return ret;
 799
 800        dbg_info("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2);
 801
 802        return 0;
 803}
 804
 805/* ------------------------------------------------------------------------ */
 806
 807static int lgdt3306a_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 808{
 809        struct lgdt3306a_state *state = fe->demodulator_priv;
 810
 811        if (state->cfg->deny_i2c_rptr) {
 812                dbg_info("deny_i2c_rptr=%d\n", state->cfg->deny_i2c_rptr);
 813                return 0;
 814        }
 815        dbg_info("(%d)\n", enable);
 816
 817        /* NI2CRPTEN=0x80 */
 818        return lgdt3306a_set_reg_bit(state, 0x0002, 7, enable ? 0 : 1);
 819}
 820
 821static int lgdt3306a_sleep(struct lgdt3306a_state *state)
 822{
 823        int ret;
 824
 825        dbg_info("\n");
 826        state->current_frequency = -1; /* force re-tune, when we wake */
 827
 828        ret = lgdt3306a_mpeg_tristate(state, 1); /* disable data bus */
 829        if (lg_chkerr(ret))
 830                goto fail;
 831
 832        ret = lgdt3306a_power(state, 0); /* power down */
 833        lg_chkerr(ret);
 834
 835fail:
 836        return 0;
 837}
 838
 839static int lgdt3306a_fe_sleep(struct dvb_frontend *fe)
 840{
 841        struct lgdt3306a_state *state = fe->demodulator_priv;
 842
 843        return lgdt3306a_sleep(state);
 844}
 845
 846static int lgdt3306a_init(struct dvb_frontend *fe)
 847{
 848        struct lgdt3306a_state *state = fe->demodulator_priv;
 849        u8 val;
 850        int ret;
 851
 852        dbg_info("\n");
 853
 854        /* 1. Normal operation mode */
 855        ret = lgdt3306a_set_reg_bit(state, 0x0001, 0, 1); /* SIMFASTENB=0x01 */
 856        if (lg_chkerr(ret))
 857                goto fail;
 858
 859        /* 2. Spectrum inversion auto detection (Not valid for VSB) */
 860        ret = lgdt3306a_set_inversion_auto(state, 0);
 861        if (lg_chkerr(ret))
 862                goto fail;
 863
 864        /* 3. Spectrum inversion(According to the tuner configuration) */
 865        ret = lgdt3306a_set_inversion(state, 1);
 866        if (lg_chkerr(ret))
 867                goto fail;
 868
 869        /* 4. Peak-to-peak voltage of ADC input signal */
 870
 871        /* ADCSEL1V=0x80=1Vpp; 0x00=2Vpp */
 872        ret = lgdt3306a_set_reg_bit(state, 0x0004, 7, 1);
 873        if (lg_chkerr(ret))
 874                goto fail;
 875
 876        /* 5. ADC output data capture clock phase */
 877
 878        /* 0=same phase as ADC clock */
 879        ret = lgdt3306a_set_reg_bit(state, 0x0004, 2, 0);
 880        if (lg_chkerr(ret))
 881                goto fail;
 882
 883        /* 5a. ADC sampling clock source */
 884
 885        /* ADCCLKPLLSEL=0x08; 0=use ext clock, not PLL */
 886        ret = lgdt3306a_set_reg_bit(state, 0x0004, 3, 0);
 887        if (lg_chkerr(ret))
 888                goto fail;
 889
 890        /* 6. Automatic PLL set */
 891
 892        /* PLLSETAUTO=0x40; 0=off */
 893        ret = lgdt3306a_set_reg_bit(state, 0x0005, 6, 0);
 894        if (lg_chkerr(ret))
 895                goto fail;
 896
 897        if (state->cfg->xtalMHz == 24) {        /* 24MHz */
 898                /* 7. Frequency for PLL output(0x2564 for 192MHz for 24MHz) */
 899                ret = lgdt3306a_read_reg(state, 0x0005, &val);
 900                if (lg_chkerr(ret))
 901                        goto fail;
 902                val &= 0xc0;
 903                val |= 0x25;
 904                ret = lgdt3306a_write_reg(state, 0x0005, val);
 905                if (lg_chkerr(ret))
 906                        goto fail;
 907                ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
 908                if (lg_chkerr(ret))
 909                        goto fail;
 910
 911                /* 8. ADC sampling frequency(0x180000 for 24MHz sampling) */
 912                ret = lgdt3306a_read_reg(state, 0x000d, &val);
 913                if (lg_chkerr(ret))
 914                        goto fail;
 915                val &= 0xc0;
 916                val |= 0x18;
 917                ret = lgdt3306a_write_reg(state, 0x000d, val);
 918                if (lg_chkerr(ret))
 919                        goto fail;
 920
 921        } else if (state->cfg->xtalMHz == 25) { /* 25MHz */
 922                /* 7. Frequency for PLL output */
 923                ret = lgdt3306a_read_reg(state, 0x0005, &val);
 924                if (lg_chkerr(ret))
 925                        goto fail;
 926                val &= 0xc0;
 927                val |= 0x25;
 928                ret = lgdt3306a_write_reg(state, 0x0005, val);
 929                if (lg_chkerr(ret))
 930                        goto fail;
 931                ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
 932                if (lg_chkerr(ret))
 933                        goto fail;
 934
 935                /* 8. ADC sampling frequency(0x190000 for 25MHz sampling) */
 936                ret = lgdt3306a_read_reg(state, 0x000d, &val);
 937                if (lg_chkerr(ret))
 938                        goto fail;
 939                val &= 0xc0;
 940                val |= 0x19;
 941                ret = lgdt3306a_write_reg(state, 0x000d, val);
 942                if (lg_chkerr(ret))
 943                        goto fail;
 944        } else {
 945                pr_err("Bad xtalMHz=%d\n", state->cfg->xtalMHz);
 946        }
 947#if 0
 948        ret = lgdt3306a_write_reg(state, 0x000e, 0x00);
 949        ret = lgdt3306a_write_reg(state, 0x000f, 0x00);
 950#endif
 951
 952        /* 9. Center frequency of input signal of ADC */
 953        ret = lgdt3306a_write_reg(state, 0x0010, 0x34); /* 3.25MHz */
 954        ret = lgdt3306a_write_reg(state, 0x0011, 0x00);
 955
 956        /* 10. Fixed gain error value */
 957        ret = lgdt3306a_write_reg(state, 0x0014, 0); /* gain error=0 */
 958
 959        /* 10a. VSB TR BW gear shift initial step */
 960        ret = lgdt3306a_read_reg(state, 0x103c, &val);
 961        val &= 0x0f;
 962        val |= 0x20; /* SAMGSAUTOSTL_V[3:0] = 2 */
 963        ret = lgdt3306a_write_reg(state, 0x103c, val);
 964
 965        /* 10b. Timing offset calibration in low temperature for VSB */
 966        ret = lgdt3306a_read_reg(state, 0x103d, &val);
 967        val &= 0xfc;
 968        val |= 0x03;
 969        ret = lgdt3306a_write_reg(state, 0x103d, val);
 970
 971        /* 10c. Timing offset calibration in low temperature for QAM */
 972        ret = lgdt3306a_read_reg(state, 0x1036, &val);
 973        val &= 0xf0;
 974        val |= 0x0c;
 975        ret = lgdt3306a_write_reg(state, 0x1036, val);
 976
 977        /* 11. Using the imaginary part of CIR in CIR loading */
 978        ret = lgdt3306a_read_reg(state, 0x211f, &val);
 979        val &= 0xef; /* do not use imaginary of CIR */
 980        ret = lgdt3306a_write_reg(state, 0x211f, val);
 981
 982        /* 12. Control of no signal detector function */
 983        ret = lgdt3306a_read_reg(state, 0x2849, &val);
 984        val &= 0xef; /* NOUSENOSIGDET=0, enable no signal detector */
 985        ret = lgdt3306a_write_reg(state, 0x2849, val);
 986
 987        /* FGR - put demod in some known mode */
 988        ret = lgdt3306a_set_vsb(state);
 989
 990        /* 13. TP stream format */
 991        ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
 992
 993        /* 14. disable output buses */
 994        ret = lgdt3306a_mpeg_tristate(state, 1);
 995
 996        /* 15. Sleep (in reset) */
 997        ret = lgdt3306a_sleep(state);
 998        lg_chkerr(ret);
 999
1000fail:

1001        return ret;
1002}
1003
1004static int lgdt3306a_set_parameters(struct dvb_frontend *fe)
1005{
1006        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
1007        struct lgdt3306a_state *state = fe->demodulator_priv;
1008        int ret;
1009
1010        dbg_info("(%d, %d)\n", p->frequency, p->modulation);
1011
1012        if (state->current_frequency  == p->frequency &&
1013           state->current_modulation == p->modulation) {
1014                dbg_info(" (already set, skipping ...)\n");
1015                return 0;
1016        }
1017        state->current_frequency = -1;
1018        state->current_modulation = -1;
1019
1020        ret = lgdt3306a_power(state, 1); /* power up */
1021        if (lg_chkerr(ret))
1022                goto fail;
1023
1024        if (fe->ops.tuner_ops.set_params) {
1025                ret = fe->ops.tuner_ops.set_params(fe);
1026                if (fe->ops.i2c_gate_ctrl)
1027                        fe->ops.i2c_gate_ctrl(fe, 0);
1028#if 0
1029                if (lg_chkerr(ret))
1030                        goto fail;
1031                state->current_frequency = p->frequency;
1032#endif
1033        }
1034
1035        ret = lgdt3306a_set_modulation(state, p);
1036        if (lg_chkerr(ret))
1037                goto fail;
1038
1039        ret = lgdt3306a_agc_setup(state, p);
1040        if (lg_chkerr(ret))
1041                goto fail;
1042
1043        ret = lgdt3306a_set_if(state, p);
1044        if (lg_chkerr(ret))
1045                goto fail;
1046
1047        ret = lgdt3306a_spectral_inversion(state, p,
1048                                        state->cfg->spectral_inversion ? 1 : 0);
1049        if (lg_chkerr(ret))
1050                goto fail;
1051
1052        ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
1053        if (lg_chkerr(ret))
1054                goto fail;
1055
1056        ret = lgdt3306a_mpeg_mode_polarity(state,
1057                                          state->cfg->tpclk_edge,
1058                                          state->cfg->tpvalid_polarity);
1059        if (lg_chkerr(ret))
1060                goto fail;
1061
1062        ret = lgdt3306a_mpeg_tristate(state, 0); /* enable data bus */
1063        if (lg_chkerr(ret))
1064                goto fail;
1065
1066        ret = lgdt3306a_soft_reset(state);
1067        if (lg_chkerr(ret))
1068                goto fail;
1069
1070#ifdef DBG_DUMP
1071        lgdt3306a_DumpAllRegs(state);
1072#endif
1073        state->current_frequency = p->frequency;
1074fail:
1075        return ret;
1076}
1077
1078static int lgdt3306a_get_frontend(struct dvb_frontend *fe,
1079                                  struct dtv_frontend_properties *p)
1080{
1081        struct lgdt3306a_state *state = fe->demodulator_priv;
1082
1083        dbg_info("(%u, %d)\n",
1084                 state->current_frequency, state->current_modulation);
1085
1086        p->modulation = state->current_modulation;
1087        p->frequency = state->current_frequency;
1088        return 0;
1089}
1090
1091static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe)
1092{
1093#if 1
1094        return DVBFE_ALGO_CUSTOM;
1095#else
1096        return DVBFE_ALGO_HW;
1097#endif
1098}
1099
1100/* ------------------------------------------------------------------------ */
1101static int lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
1102{
1103        u8 val;
1104        int ret;
1105        u8 snrRef, maxPowerMan, nCombDet;
1106        u16 fbDlyCir;
1107
1108        ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1109        if (ret)
1110                return ret;
1111        snrRef = val & 0x3f;
1112
1113        ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan);
1114        if (ret)
1115                return ret;
1116
1117        ret = lgdt3306a_read_reg(state, 0x2191, &val);
1118        if (ret)
1119                return ret;
1120        nCombDet = (val & 0x80) >> 7;
1121
1122        ret = lgdt3306a_read_reg(state, 0x2180, &val);
1123        if (ret)
1124                return ret;
1125        fbDlyCir = (val & 0x03) << 8;
1126
1127        ret = lgdt3306a_read_reg(state, 0x2181, &val);
1128        if (ret)
1129                return ret;
1130        fbDlyCir |= val;
1131
1132        dbg_info("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n",
1133                snrRef, maxPowerMan, nCombDet, fbDlyCir);
1134
1135        /* Carrier offset sub loop bandwidth */
1136        ret = lgdt3306a_read_reg(state, 0x1061, &val);
1137        if (ret)
1138                return ret;
1139        val &= 0xf8;
1140        if ((snrRef > 18) && (maxPowerMan > 0x68)
1141            && (nCombDet == 0x01)
1142            && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) {
1143                /* SNR is over 18dB and no ghosting */
1144                val |= 0x00; /* final bandwidth = 0 */
1145        } else {
1146                val |= 0x04; /* final bandwidth = 4 */
1147        }
1148        ret = lgdt3306a_write_reg(state, 0x1061, val);
1149        if (ret)
1150                return ret;
1151
1152        /* Adjust Notch Filter */
1153        ret = lgdt3306a_read_reg(state, 0x0024, &val);
1154        if (ret)
1155                return ret;
1156        val &= 0x0f;
1157        if (nCombDet == 0) { /* Turn on the Notch Filter */
1158                val |= 0x50;
1159        }
1160        ret = lgdt3306a_write_reg(state, 0x0024, val);
1161        if (ret)
1162                return ret;
1163
1164        /* VSB Timing Recovery output normalization */
1165        ret = lgdt3306a_read_reg(state, 0x103d, &val);
1166        if (ret)
1167                return ret;
1168        val &= 0xcf;
1169        val |= 0x20;
1170        ret = lgdt3306a_write_reg(state, 0x103d, val);
1171
1172        return ret;
1173}
1174
1175static enum lgdt3306a_modulation
1176lgdt3306a_check_oper_mode(struct lgdt3306a_state *state)
1177{
1178        u8 val = 0;
1179        int ret;
1180
1181        ret = lgdt3306a_read_reg(state, 0x0081, &val);
1182        if (ret)
1183                goto err;
1184
1185        if (val & 0x80) {
1186                dbg_info("VSB\n");
1187                return LG3306_VSB;
1188        }
1189        if (val & 0x08) {
1190                ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1191                if (ret)
1192                        goto err;
1193                val = val >> 2;
1194                if (val & 0x01) {
1195                        dbg_info("QAM256\n");
1196                        return LG3306_QAM256;
1197                }
1198                dbg_info("QAM64\n");
1199                return LG3306_QAM64;
1200        }
1201err:
1202        pr_warn("UNKNOWN\n");
1203        return LG3306_UNKNOWN_MODE;
1204}
1205
1206static enum lgdt3306a_lock_status
1207lgdt3306a_check_lock_status(struct lgdt3306a_state *state,
1208                            enum lgdt3306a_lock_check whatLock)
1209{
1210        u8 val = 0;
1211        int ret;
1212        enum lgdt3306a_modulation       modeOper;
1213        enum lgdt3306a_lock_status lockStatus;
1214
1215        modeOper = LG3306_UNKNOWN_MODE;
1216
1217        switch (whatLock) {
1218        case LG3306_SYNC_LOCK:
1219        {
1220                ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1221                if (ret)
1222                        return ret;
1223
1224                if ((val & 0x80) == 0x80)
1225                        lockStatus = LG3306_LOCK;
1226                else
1227                        lockStatus = LG3306_UNLOCK;
1228
1229                dbg_info("SYNC_LOCK=%x\n", lockStatus);
1230                break;
1231        }
1232        case LG3306_AGC_LOCK:
1233        {
1234                ret = lgdt3306a_read_reg(state, 0x0080, &val);
1235                if (ret)
1236                        return ret;
1237
1238                if ((val & 0x40) == 0x40)
1239                        lockStatus = LG3306_LOCK;
1240                else
1241                        lockStatus = LG3306_UNLOCK;
1242
1243                dbg_info("AGC_LOCK=%x\n", lockStatus);
1244                break;
1245        }
1246        case LG3306_TR_LOCK:
1247        {
1248                modeOper = lgdt3306a_check_oper_mode(state);
1249                if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1250                        ret = lgdt3306a_read_reg(state, 0x1094, &val);
1251                        if (ret)
1252                                return ret;
1253
1254                        if ((val & 0x80) == 0x80)
1255                                lockStatus = LG3306_LOCK;
1256                        else
1257                                lockStatus = LG3306_UNLOCK;
1258                } else
1259                        lockStatus = LG3306_UNKNOWN_LOCK;
1260
1261                dbg_info("TR_LOCK=%x\n", lockStatus);
1262                break;
1263        }
1264        case LG3306_FEC_LOCK:
1265        {
1266                modeOper = lgdt3306a_check_oper_mode(state);
1267                if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1268                        ret = lgdt3306a_read_reg(state, 0x0080, &val);
1269                        if (ret)
1270                                return ret;
1271
1272                        if ((val & 0x10) == 0x10)
1273                                lockStatus = LG3306_LOCK;
1274                        else
1275                                lockStatus = LG3306_UNLOCK;
1276                } else
1277                        lockStatus = LG3306_UNKNOWN_LOCK;
1278
1279                dbg_info("FEC_LOCK=%x\n", lockStatus);
1280                break;
1281        }
1282
1283        default:
1284                lockStatus = LG3306_UNKNOWN_LOCK;
1285                pr_warn("UNKNOWN whatLock=%d\n", whatLock);
1286                break;
1287        }
1288
1289        return lockStatus;
1290}
1291
1292static enum lgdt3306a_neverlock_status
1293lgdt3306a_check_neverlock_status(struct lgdt3306a_state *state)
1294{
1295        u8 val = 0;
1296        int ret;
1297        enum lgdt3306a_neverlock_status lockStatus;
1298
1299        ret = lgdt3306a_read_reg(state, 0x0080, &val);
1300        if (ret)
1301                return ret;
1302        lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03);
1303
1304        dbg_info("NeverLock=%d", lockStatus);
1305
1306        return lockStatus;
1307}
1308
1309static int lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
1310{
1311        u8 val = 0;
1312        int ret;
1313        u8 currChDiffACQ, snrRef, mainStrong, aiccrejStatus;
1314
1315        /* Channel variation */
1316        ret = lgdt3306a_read_reg(state, 0x21bc, &currChDiffACQ);
1317        if (ret)
1318                return ret;
1319
1320        /* SNR of Frame sync */
1321        ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1322        if (ret)
1323                return ret;
1324        snrRef = val & 0x3f;
1325
1326        /* Strong Main CIR */
1327        ret = lgdt3306a_read_reg(state, 0x2199, &val);
1328        if (ret)
1329                return ret;
1330        mainStrong = (val & 0x40) >> 6;
1331
1332        ret = lgdt3306a_read_reg(state, 0x0090, &val);
1333        if (ret)
1334                return ret;
1335        aiccrejStatus = (val & 0xf0) >> 4;
1336
1337        dbg_info("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n",
1338                snrRef, mainStrong, aiccrejStatus, currChDiffACQ);
1339
1340#if 0
1341        /* Dynamic ghost exists */
1342        if ((mainStrong == 0) && (currChDiffACQ > 0x70))
1343#endif
1344        if (mainStrong == 0) {
1345                ret = lgdt3306a_read_reg(state, 0x2135, &val);
1346                if (ret)
1347                        return ret;
1348                val &= 0x0f;
1349                val |= 0xa0;
1350                ret = lgdt3306a_write_reg(state, 0x2135, val);
1351                if (ret)
1352                        return ret;
1353
1354                ret = lgdt3306a_read_reg(state, 0x2141, &val);
1355                if (ret)
1356                        return ret;
1357                val &= 0x3f;
1358                val |= 0x80;
1359                ret = lgdt3306a_write_reg(state, 0x2141, val);
1360                if (ret)
1361                        return ret;
1362
1363                ret = lgdt3306a_write_reg(state, 0x2122, 0x70);
1364                if (ret)
1365                        return ret;
1366        } else { /* Weak ghost or static channel */
1367                ret = lgdt3306a_read_reg(state, 0x2135, &val);
1368                if (ret)
1369                        return ret;
1370                val &= 0x0f;
1371                val |= 0x70;
1372                ret = lgdt3306a_write_reg(state, 0x2135, val);
1373                if (ret)
1374                        return ret;
1375
1376                ret = lgdt3306a_read_reg(state, 0x2141, &val);
1377                if (ret)
1378                        return ret;
1379                val &= 0x3f;
1380                val |= 0x40;
1381                ret = lgdt3306a_write_reg(state, 0x2141, val);
1382                if (ret)
1383                        return ret;
1384
1385                ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
1386                if (ret)
1387                        return ret;
1388        }
1389        return 0;
1390}
1391
1392static enum lgdt3306a_lock_status
1393lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state)
1394{
1395        enum lgdt3306a_lock_status syncLockStatus = LG3306_UNLOCK;
1396        int     i;
1397
1398        for (i = 0; i < 2; i++) {
1399                msleep(30);
1400
1401                syncLockStatus = lgdt3306a_check_lock_status(state,
1402                                                             LG3306_SYNC_LOCK);
1403
1404                if (syncLockStatus == LG3306_LOCK) {
1405                        dbg_info("locked(%d)\n", i);
1406                        return LG3306_LOCK;
1407                }
1408        }
1409        dbg_info("not locked\n");
1410        return LG3306_UNLOCK;
1411}
1412
1413static enum lgdt3306a_lock_status
1414lgdt3306a_fec_lock_poll(struct lgdt3306a_state *state)
1415{
1416        enum lgdt3306a_lock_status FECLockStatus = LG3306_UNLOCK;
1417        int     i;
1418
1419        for (i = 0; i < 2; i++) {
1420                msleep(30);
1421
1422                FECLockStatus = lgdt3306a_check_lock_status(state,
1423                                                            LG3306_FEC_LOCK);
1424
1425                if (FECLockStatus == LG3306_LOCK) {
1426                        dbg_info("locked(%d)\n", i);
1427                        return FECLockStatus;
1428                }
1429        }
1430        dbg_info("not locked\n");
1431        return FECLockStatus;
1432}
1433
1434static enum lgdt3306a_neverlock_status
1435lgdt3306a_neverlock_poll(struct lgdt3306a_state *state)
1436{
1437        enum lgdt3306a_neverlock_status NLLockStatus = LG3306_NL_FAIL;
1438        int     i;
1439
1440        for (i = 0; i < 5; i++) {
1441                msleep(30);
1442
1443                NLLockStatus = lgdt3306a_check_neverlock_status(state);
1444
1445                if (NLLockStatus == LG3306_NL_LOCK) {
1446                        dbg_info("NL_LOCK(%d)\n", i);
1447                        return NLLockStatus;
1448                }
1449        }
1450        dbg_info("NLLockStatus=%d\n", NLLockStatus);
1451        return NLLockStatus;
1452}
1453
1454static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state)
1455{
1456        u8 val;
1457        int ret;
1458
1459        ret = lgdt3306a_read_reg(state, 0x00fa, &val);
1460        if (ret)
1461                return ret;
1462
1463        return val;
1464}
1465
1466static const u32 valx_x10[] = {
1467        10,  11,  13,  15,  17,  20,  25,  33,  41,  50,  59,  73,  87,  100
1468};
1469static const u32 log10x_x1000[] = {
1470        0,   41, 114, 176, 230, 301, 398, 518, 613, 699, 771, 863, 939, 1000
1471};
1472
1473static u32 log10_x1000(u32 x)
1474{
1475        u32 diff_val, step_val, step_log10;
1476        u32 log_val = 0;
1477        u32 i;
1478
1479        if (x <= 0)
1480                return -1000000; /* signal error */
1481
1482        if (x == 10)
1483                return 0; /* log(1)=0 */
1484
1485        if (x < 10) {
1486                while (x < 10) {
1487                        x = x * 10;
1488                        log_val--;
1489                }
1490        } else {        /* x > 10 */
1491                while (x >= 100) {
1492                        x = x / 10;
1493                        log_val++;
1494                }
1495        }
1496        log_val *= 1000;
1497
1498        if (x == 10) /* was our input an exact multiple of 10 */
1499                return log_val; /* don't need to interpolate */
1500
1501        /* find our place on the log curve */
1502        for (i = 1; i < ARRAY_SIZE(valx_x10); i++) {
1503                if (valx_x10[i] >= x)
1504                        break;
1505        }
1506        if (i == ARRAY_SIZE(valx_x10))
1507                return log_val + log10x_x1000[i - 1];
1508
1509        diff_val   = x - valx_x10[i-1];
1510        step_val   = valx_x10[i] - valx_x10[i - 1];
1511        step_log10 = log10x_x1000[i] - log10x_x1000[i - 1];
1512
1513        /* do a linear interpolation to get in-between values */
1514        return log_val + log10x_x1000[i - 1] +
1515                ((diff_val*step_log10) / step_val);
1516}
1517
1518static u32 lgdt3306a_calculate_snr_x100(struct lgdt3306a_state *state)
1519{
1520        u32 mse; /* Mean-Square Error */
1521        u32 pwr; /* Constelation power */
1522        u32 snr_x100;
1523
1524        mse = (read_reg(state, 0x00ec) << 8) |
1525              (read_reg(state, 0x00ed));
1526        pwr = (read_reg(state, 0x00e8) << 8) |
1527              (read_reg(state, 0x00e9));
1528
1529        if (mse == 0) /* no signal */
1530                return 0;
1531
1532        snr_x100 = log10_x1000((pwr * 10000) / mse) - 3000;
1533        dbg_info("mse=%u, pwr=%u, snr_x100=%d\n", mse, pwr, snr_x100);
1534
1535        return snr_x100;
1536}
1537
1538static enum lgdt3306a_lock_status
1539lgdt3306a_vsb_lock_poll(struct lgdt3306a_state *state)
1540{
1541        int ret;
1542        u8 cnt = 0;
1543        u8 packet_error;
1544        u32 snr;
1545
1546        for (cnt = 0; cnt < 10; cnt++) {
1547                if (lgdt3306a_sync_lock_poll(state) == LG3306_UNLOCK) {
1548                        dbg_info("no sync lock!\n");
1549                        return LG3306_UNLOCK;
1550                }
1551
1552                msleep(20);
1553                ret = lgdt3306a_pre_monitoring(state);
1554                if (ret)
1555                        break;
1556
1557                packet_error = lgdt3306a_get_packet_error(state);
1558                snr = lgdt3306a_calculate_snr_x100(state);
1559                dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1560
1561                if ((snr >= 1500) && (packet_error < 0xff))
1562                        return LG3306_LOCK;
1563        }
1564
1565        dbg_info("not locked!\n");
1566        return LG3306_UNLOCK;
1567}
1568
1569static enum lgdt3306a_lock_status
1570lgdt3306a_qam_lock_poll(struct lgdt3306a_state *state)
1571{
1572        u8 cnt;
1573        u8 packet_error;
1574        u32     snr;
1575
1576        for (cnt = 0; cnt < 10; cnt++) {
1577                if (lgdt3306a_fec_lock_poll(state) == LG3306_UNLOCK) {
1578                        dbg_info("no fec lock!\n");
1579                        return LG3306_UNLOCK;
1580                }
1581
1582                msleep(20);
1583
1584                packet_error = lgdt3306a_get_packet_error(state);
1585                snr = lgdt3306a_calculate_snr_x100(state);
1586                dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1587
1588                if ((snr >= 1500) && (packet_error < 0xff))
1589                        return LG3306_LOCK;
1590        }
1591
1592        dbg_info("not locked!\n");
1593        return LG3306_UNLOCK;
1594}
1595
1596static int lgdt3306a_read_status(struct dvb_frontend *fe,
1597                                 enum fe_status *status)
1598{
1599        struct lgdt3306a_state *state = fe->demodulator_priv;
1600        u16 strength = 0;
1601        int ret = 0;
1602
1603        if (fe->ops.tuner_ops.get_rf_strength) {
1604                ret = fe->ops.tuner_ops.get_rf_strength(fe, &strength);
1605                if (ret == 0)
1606                        dbg_info("strength=%d\n", strength);
1607                else
1608                        dbg_info("fe->ops.tuner_ops.get_rf_strength() failed\n");
1609        }
1610
1611        *status = 0;
1612        if (lgdt3306a_neverlock_poll(state) == LG3306_NL_LOCK) {
1613                *status |= FE_HAS_SIGNAL;
1614                *status |= FE_HAS_CARRIER;
1615
1616                switch (state->current_modulation) {
1617                case QAM_256:
1618                case QAM_64:
1619                case QAM_AUTO:
1620                        if (lgdt3306a_qam_lock_poll(state) == LG3306_LOCK) {
1621                                *status |= FE_HAS_VITERBI;
1622                                *status |= FE_HAS_SYNC;
1623
1624                                *status |= FE_HAS_LOCK;
1625                        }
1626                        break;
1627                case VSB_8:
1628                        if (lgdt3306a_vsb_lock_poll(state) == LG3306_LOCK) {
1629                                *status |= FE_HAS_VITERBI;
1630                                *status |= FE_HAS_SYNC;
1631
1632                                *status |= FE_HAS_LOCK;
1633
1634                                ret = lgdt3306a_monitor_vsb(state);
1635                        }
1636                        break;
1637                default:
1638                        ret = -EINVAL;
1639                }
1640        }
1641        return ret;
1642}
1643
1644
1645static int lgdt3306a_read_snr(struct dvb_frontend *fe, u16 *snr)
1646{
1647        struct lgdt3306a_state *state = fe->demodulator_priv;
1648
1649        state->snr = lgdt3306a_calculate_snr_x100(state);
1650        /* report SNR in dB * 10 */
1651        *snr = state->snr/10;
1652
1653        return 0;
1654}
1655
1656static int lgdt3306a_read_signal_strength(struct dvb_frontend *fe,
1657                                         u16 *strength)
1658{
1659        /*
1660         * Calculate some sort of "strength" from SNR
1661         */
1662        struct lgdt3306a_state *state = fe->demodulator_priv;
1663        u8 val;
1664        u16 snr; /* snr_x10 */
1665        int ret;
1666        u32 ref_snr; /* snr*100 */
1667        u32 str;
1668
1669        *strength = 0;
1670
1671        switch (state->current_modulation) {
1672        case VSB_8:
1673                 ref_snr = 1600; /* 16dB */
1674                 break;
1675        case QAM_64:
1676        case QAM_256:
1677        case QAM_AUTO:
1678                /* need to know actual modulation to set proper SNR baseline */
1679                ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1680                if (lg_chkerr(ret))
1681                        goto fail;
1682
1683                if(val & 0x04)
1684                        ref_snr = 2800; /* QAM-256 28dB */
1685                else
1686                        ref_snr = 2200; /* QAM-64  22dB */
1687                break;
1688        default:
1689                return -EINVAL;
1690        }
1691
1692        ret = fe->ops.read_snr(fe, &snr);
1693        if (lg_chkerr(ret))
1694                goto fail;
1695
1696        if (state->snr <= (ref_snr - 100))
1697                str = 0;
1698        else if (state->snr <= ref_snr)
1699                str = (0xffff * 65) / 100; /* 65% */
1700        else {
1701                str = state->snr - ref_snr;
1702                str /= 50;
1703                str += 78; /* 78%-100% */
1704                if (str > 100)
1705                        str = 100;
1706                str = (0xffff * str) / 100;
1707        }
1708        *strength = (u16)str;
1709        dbg_info("strength=%u\n", *strength);
1710
1711fail:
1712        return ret;
1713}
1714
1715/* ------------------------------------------------------------------------ */
1716
1717static int lgdt3306a_read_ber(struct dvb_frontend *fe, u32 *ber)
1718{
1719        struct lgdt3306a_state *state = fe->demodulator_priv;
1720        u32 tmp;
1721
1722        *ber = 0;
1723#if 1
1724        /* FGR - FIXME - I don't know what value is expected by dvb_core
1725         * what is the scale of the value?? */
1726        tmp =              read_reg(state, 0x00fc); /* NBERVALUE[24-31] */
1727        tmp = (tmp << 8) | read_reg(state, 0x00fd); /* NBERVALUE[16-23] */
1728        tmp = (tmp << 8) | read_reg(state, 0x00fe); /* NBERVALUE[8-15] */
1729        tmp = (tmp << 8) | read_reg(state, 0x00ff); /* NBERVALUE[0-7] */
1730        *ber = tmp;
1731        dbg_info("ber=%u\n", tmp);
1732#endif
1733        return 0;
1734}
1735
1736static int lgdt3306a_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1737{
1738        struct lgdt3306a_state *state = fe->demodulator_priv;
1739
1740        *ucblocks = 0;
1741#if 1
1742        /* FGR - FIXME - I don't know what value is expected by dvb_core
1743         * what happens when value wraps? */
1744        *ucblocks = read_reg(state, 0x00f4); /* TPIFTPERRCNT[0-7] */
1745        dbg_info("ucblocks=%u\n", *ucblocks);
1746#endif
1747
1748        return 0;
1749}
1750
1751static int lgdt3306a_tune(struct dvb_frontend *fe, bool re_tune,
1752                          unsigned int mode_flags, unsigned int *delay,
1753                          enum fe_status *status)
1754{
1755        int ret = 0;
1756        struct lgdt3306a_state *state = fe->demodulator_priv;
1757
1758        dbg_info("re_tune=%u\n", re_tune);
1759
1760        if (re_tune) {
1761                state->current_frequency = -1; /* force re-tune */
1762                ret = lgdt3306a_set_parameters(fe);
1763                if (ret != 0)
1764                        return ret;
1765        }
1766        *delay = 125;
1767        ret = lgdt3306a_read_status(fe, status);
1768
1769        return ret;
1770}
1771
1772static int lgdt3306a_get_tune_settings(struct dvb_frontend *fe,
1773                                       struct dvb_frontend_tune_settings
1774                                       *fe_tune_settings)
1775{
1776        fe_tune_settings->min_delay_ms = 100;
1777        dbg_info("\n");
1778        return 0;
1779}
1780
1781static enum dvbfe_search lgdt3306a_search(struct dvb_frontend *fe)
1782{
1783        enum fe_status status = 0;
1784        int ret;
1785
1786        /* set frontend */
1787        ret = lgdt3306a_set_parameters(fe);
1788        if (ret)
1789                goto error;
1790
1791        ret = lgdt3306a_read_status(fe, &status);
1792        if (ret)
1793                goto error;
1794
1795        /* check if we have a valid signal */
1796        if (status & FE_HAS_LOCK)
1797                return DVBFE_ALGO_SEARCH_SUCCESS;
1798        else
1799                return DVBFE_ALGO_SEARCH_AGAIN;
1800
1801error:
1802        dbg_info("failed (%d)\n", ret);
1803        return DVBFE_ALGO_SEARCH_ERROR;
1804}
1805
1806static void lgdt3306a_release(struct dvb_frontend *fe)
1807{
1808        struct lgdt3306a_state *state = fe->demodulator_priv;
1809
1810        dbg_info("\n");
1811        kfree(state);
1812}
1813
1814static const struct dvb_frontend_ops lgdt3306a_ops;
1815
1816struct dvb_frontend *lgdt3306a_attach(const struct lgdt3306a_config *config,
1817                                      struct i2c_adapter *i2c_adap)
1818{
1819        struct lgdt3306a_state *state = NULL;
1820        int ret;
1821        u8 val;
1822
1823        dbg_info("(%d-%04x)\n",
1824               i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1825               config ? config->i2c_addr : 0);
1826
1827        state = kzalloc(sizeof(struct lgdt3306a_state), GFP_KERNEL);
1828        if (state == NULL)
1829                goto fail;
1830
1831        state->cfg = config;
1832        state->i2c_adap = i2c_adap;
1833
1834        memcpy(&state->frontend.ops, &lgdt3306a_ops,
1835               sizeof(struct dvb_frontend_ops));
1836        state->frontend.demodulator_priv = state;
1837
1838        /* verify that we're talking to a lg3306a */
1839        /* FGR - NOTE - there is no obvious ChipId to check; we check
1840         * some "known" bits after reset, but it's still just a guess */
1841        ret = lgdt3306a_read_reg(state, 0x0000, &val);
1842        if (lg_chkerr(ret))
1843                goto fail;
1844        if ((val & 0x74) != 0x74) {
1845                pr_warn("expected 0x74, got 0x%x\n", (val & 0x74));
1846#if 0
1847                /* FIXME - re-enable when we know this is right */
1848                goto fail;
1849#endif
1850        }
1851        ret = lgdt3306a_read_reg(state, 0x0001, &val);
1852        if (lg_chkerr(ret))
1853                goto fail;
1854        if ((val & 0xf6) != 0xc6) {
1855                pr_warn("expected 0xc6, got 0x%x\n", (val & 0xf6));
1856#if 0
1857                /* FIXME - re-enable when we know this is right */
1858                goto fail;
1859#endif
1860        }
1861        ret = lgdt3306a_read_reg(state, 0x0002, &val);
1862        if (lg_chkerr(ret))
1863                goto fail;
1864        if ((val & 0x73) != 0x03) {
1865                pr_warn("expected 0x03, got 0x%x\n", (val & 0x73));
1866#if 0
1867                /* FIXME - re-enable when we know this is right */
1868                goto fail;
1869#endif
1870        }
1871
1872        state->current_frequency = -1;
1873        state->current_modulation = -1;
1874
1875        lgdt3306a_sleep(state);
1876
1877        return &state->frontend;
1878
1879fail:
1880        pr_warn("unable to detect LGDT3306A hardware\n");
1881        kfree(state);
1882        return NULL;
1883}
1884EXPORT_SYMBOL(lgdt3306a_attach);
1885
1886#ifdef DBG_DUMP
1887
1888static const short regtab[] = {
1889        0x0000, /* SOFTRSTB 1'b1 1'b1 1'b1 ADCPDB 1'b1 PLLPDB GBBPDB 11111111 */
1890        0x0001, /* 1'b1 1'b1 1'b0 1'b0 AUTORPTRS */
1891        0x0002, /* NI2CRPTEN 1'b0 1'b0 1'b0 SPECINVAUT */
1892        0x0003, /* AGCRFOUT */
1893        0x0004, /* ADCSEL1V ADCCNT ADCCNF ADCCNS ADCCLKPLL */
1894        0x0005, /* PLLINDIVSE */
1895        0x0006, /* PLLCTRL[7:0] 11100001 */
1896        0x0007, /* SYSINITWAITTIME[7:0] (msec) 00001000 */
1897        0x0008, /* STDOPMODE[7:0] 10000000 */
1898        0x0009, /* 1'b0 1'b0 1'b0 STDOPDETTMODE[2:0] STDOPDETCMODE[1:0] 00011110 */
1899        0x000a, /* DAFTEN 1'b1 x x SCSYSLOCK */
1900        0x000b, /* SCSYSLOCKCHKTIME[7:0] (10msec) 01100100 */
1901        0x000d, /* x SAMPLING4 */
1902        0x000e, /* SAMFREQ[15:8] 00000000 */
1903        0x000f, /* SAMFREQ[7:0] 00000000 */
1904        0x0010, /* IFFREQ[15:8] 01100000 */
1905        0x0011, /* IFFREQ[7:0] 00000000 */
1906        0x0012, /* AGCEN AGCREFMO */
1907        0x0013, /* AGCRFFIXB AGCIFFIXB AGCLOCKDETRNGSEL[1:0] 1'b1 1'b0 1'b0 1'b0 11101000 */
1908        0x0014, /* AGCFIXVALUE[7:0] 01111111 */
1909        0x0015, /* AGCREF[15:8] 00001010 */
1910        0x0016, /* AGCREF[7:0] 11100100 */
1911        0x0017, /* AGCDELAY[7:0] 00100000 */
1912        0x0018, /* AGCRFBW[3:0] AGCIFBW[3:0] 10001000 */
1913        0x0019, /* AGCUDOUTMODE[1:0] AGCUDCTRLLEN[1:0] AGCUDCTRL */
1914        0x001c, /* 1'b1 PFEN MFEN AICCVSYNC */
1915        0x001d, /* 1'b0 1'b1 1'b0 1'b1 AICCVSYNC */
1916        0x001e, /* AICCALPHA[3:0] 1'b1 1'b0 1'b1 1'b0 01111010 */
1917        0x001f, /* AICCDETTH[19:16] AICCOFFTH[19:16] 00000000 */
1918        0x0020, /* AICCDETTH[15:8] 01111100 */
1919        0x0021, /* AICCDETTH[7:0] 00000000 */
1920        0x0022, /* AICCOFFTH[15:8] 00000101 */
1921        0x0023, /* AICCOFFTH[7:0] 11100000 */
1922        0x0024, /* AICCOPMODE3[1:0] AICCOPMODE2[1:0] AICCOPMODE1[1:0] AICCOPMODE0[1:0] 00000000 */
1923        0x0025, /* AICCFIXFREQ3[23:16] 00000000 */
1924        0x0026, /* AICCFIXFREQ3[15:8] 00000000 */
1925        0x0027, /* AICCFIXFREQ3[7:0] 00000000 */
1926        0x0028, /* AICCFIXFREQ2[23:16] 00000000 */
1927        0x0029, /* AICCFIXFREQ2[15:8] 00000000 */
1928        0x002a, /* AICCFIXFREQ2[7:0] 00000000 */
1929        0x002b, /* AICCFIXFREQ1[23:16] 00000000 */
1930        0x002c, /* AICCFIXFREQ1[15:8] 00000000 */
1931        0x002d, /* AICCFIXFREQ1[7:0] 00000000 */
1932        0x002e, /* AICCFIXFREQ0[23:16] 00000000 */
1933        0x002f, /* AICCFIXFREQ0[15:8] 00000000 */
1934        0x0030, /* AICCFIXFREQ0[7:0] 00000000 */
1935        0x0031, /* 1'b0 1'b1 1'b0 1'b0 x DAGC1STER */
1936        0x0032, /* DAGC1STEN DAGC1STER */
1937        0x0033, /* DAGC1STREF[15:8] 00001010 */
1938        0x0034, /* DAGC1STREF[7:0] 11100100 */
1939        0x0035, /* DAGC2NDE */
1940        0x0036, /* DAGC2NDREF[15:8] 00001010 */
1941        0x0037, /* DAGC2NDREF[7:0] 10000000 */
1942        0x0038, /* DAGC2NDLOCKDETRNGSEL[1:0] */
1943        0x003d, /* 1'b1 SAMGEARS */
1944        0x0040, /* SAMLFGMA */
1945        0x0041, /* SAMLFBWM */
1946        0x0044, /* 1'b1 CRGEARSHE */
1947        0x0045, /* CRLFGMAN */
1948        0x0046, /* CFLFBWMA */
1949        0x0047, /* CRLFGMAN */
1950        0x0048, /* x x x x CRLFGSTEP_VS[3:0] xxxx1001 */
1951        0x0049, /* CRLFBWMA */
1952        0x004a, /* CRLFBWMA */
1953        0x0050, /* 1'b0 1'b1 1'b1 1'b0 MSECALCDA */
1954        0x0070, /* TPOUTEN TPIFEN TPCLKOUTE */
1955        0x0071, /* TPSENB TPSSOPBITE */
1956        0x0073, /* TP47HINS x x CHBERINT PERMODE[1:0] PERINT[1:0] 1xx11100 */
1957        0x0075, /* x x x x x IQSWAPCTRL[2:0] xxxxx000 */
1958        0x0076, /* NBERCON NBERST NBERPOL NBERWSYN */
1959        0x0077, /* x NBERLOSTTH[2:0] NBERACQTH[3:0] x0000000 */
1960        0x0078, /* NBERPOLY[31:24] 00000000 */
1961        0x0079, /* NBERPOLY[23:16] 00000000 */
1962        0x007a, /* NBERPOLY[15:8] 00000000 */
1963        0x007b, /* NBERPOLY[7:0] 00000000 */
1964        0x007c, /* NBERPED[31:24] 00000000 */
1965        0x007d, /* NBERPED[23:16] 00000000 */
1966        0x007e, /* NBERPED[15:8] 00000000 */
1967        0x007f, /* NBERPED[7:0] 00000000 */
1968        0x0080, /* x AGCLOCK DAGCLOCK SYSLOCK x x NEVERLOCK[1:0] */
1969        0x0085, /* SPECINVST */
1970        0x0088, /* SYSLOCKTIME[15:8] */
1971        0x0089, /* SYSLOCKTIME[7:0] */
1972        0x008c, /* FECLOCKTIME[15:8] */
1973        0x008d, /* FECLOCKTIME[7:0] */
1974        0x008e, /* AGCACCOUT[15:8] */
1975        0x008f, /* AGCACCOUT[7:0] */
1976        0x0090, /* AICCREJSTATUS[3:0] AICCREJBUSY[3:0] */
1977        0x0091, /* AICCVSYNC */
1978        0x009c, /* CARRFREQOFFSET[15:8] */
1979        0x009d, /* CARRFREQOFFSET[7:0] */
1980        0x00a1, /* SAMFREQOFFSET[23:16] */
1981        0x00a2, /* SAMFREQOFFSET[15:8] */
1982        0x00a3, /* SAMFREQOFFSET[7:0] */
1983        0x00a6, /* SYNCLOCK SYNCLOCKH */
1984#if 0 /* covered elsewhere */
1985        0x00e8, /* CONSTPWR[15:8] */
1986        0x00e9, /* CONSTPWR[7:0] */
1987        0x00ea, /* BMSE[15:8] */
1988        0x00eb, /* BMSE[7:0] */
1989        0x00ec, /* MSE[15:8] */
1990        0x00ed, /* MSE[7:0] */
1991        0x00ee, /* CONSTI[7:0] */
1992        0x00ef, /* CONSTQ[7:0] */
1993#endif
1994        0x00f4, /* TPIFTPERRCNT[7:0] */
1995        0x00f5, /* TPCORREC */
1996        0x00f6, /* VBBER[15:8] */
1997        0x00f7, /* VBBER[7:0] */
1998        0x00f8, /* VABER[15:8] */
1999        0x00f9, /* VABER[7:0] */
2000        0x00fa, /* TPERRCNT[7:0] */

2001        0x00fb, /* NBERLOCK x x x x x x x */
2002        0x00fc, /* NBERVALUE[31:24] */
2003        0x00fd, /* NBERVALUE[23:16] */
2004        0x00fe, /* NBERVALUE[15:8] */
2005        0x00ff, /* NBERVALUE[7:0] */
2006        0x1000, /* 1'b0 WODAGCOU */
2007        0x1005, /* x x 1'b1 1'b1 x SRD_Q_QM */
2008        0x1009, /* SRDWAITTIME[7:0] (10msec) 00100011 */
2009        0x100a, /* SRDWAITTIME_CQS[7:0] (msec) 01100100 */
2010        0x101a, /* x 1'b1 1'b0 1'b0 x QMDQAMMODE[2:0] x100x010 */
2011        0x1036, /* 1'b0 1'b1 1'b0 1'b0 SAMGSEND_CQS[3:0] 01001110 */
2012        0x103c, /* SAMGSAUTOSTL_V[3:0] SAMGSAUTOEDL_V[3:0] 01000110 */
2013        0x103d, /* 1'b1 1'b1 SAMCNORMBP_V[1:0] 1'b0 1'b0 SAMMODESEL_V[1:0] 11100001 */
2014        0x103f, /* SAMZTEDSE */
2015        0x105d, /* EQSTATUSE */
2016        0x105f, /* x PMAPG2_V[2:0] x DMAPG2_V[2:0] x001x011 */
2017        0x1060, /* 1'b1 EQSTATUSE */
2018        0x1061, /* CRMAPBWSTL_V[3:0] CRMAPBWEDL_V[3:0] 00000100 */
2019        0x1065, /* 1'b0 x CRMODE_V[1:0] 1'b1 x 1'b1 x 0x111x1x */
2020        0x1066, /* 1'b0 1'b0 1'b1 1'b0 1'b1 PNBOOSTSE */
2021        0x1068, /* CREPHNGAIN2_V[3:0] CREPHNPBW_V[3:0] 10010001 */
2022        0x106e, /* x x x x x CREPHNEN_ */
2023        0x106f, /* CREPHNTH_V[7:0] 00010101 */
2024        0x1072, /* CRSWEEPN */
2025        0x1073, /* CRPGAIN_V[3:0] x x 1'b1 1'b1 1001xx11 */
2026        0x1074, /* CRPBW_V[3:0] x x 1'b1 1'b1 0001xx11 */
2027        0x1080, /* DAFTSTATUS[1:0] x x x x x x */
2028        0x1081, /* SRDSTATUS[1:0] x x x x x SRDLOCK */
2029        0x10a9, /* EQSTATUS_CQS[1:0] x x x x x x */
2030        0x10b7, /* EQSTATUS_V[1:0] x x x x x x */
2031#if 0 /* SMART_ANT */
2032        0x1f00, /* MODEDETE */
2033        0x1f01, /* x x x x x x x SFNRST xxxxxxx0 */
2034        0x1f03, /* NUMOFANT[7:0] 10000000 */
2035        0x1f04, /* x SELMASK[6:0] x0000000 */
2036        0x1f05, /* x SETMASK[6:0] x0000000 */
2037        0x1f06, /* x TXDATA[6:0] x0000000 */
2038        0x1f07, /* x CHNUMBER[6:0] x0000000 */
2039        0x1f09, /* AGCTIME[23:16] 10011000 */
2040        0x1f0a, /* AGCTIME[15:8] 10010110 */
2041        0x1f0b, /* AGCTIME[7:0] 10000000 */
2042        0x1f0c, /* ANTTIME[31:24] 00000000 */
2043        0x1f0d, /* ANTTIME[23:16] 00000011 */
2044        0x1f0e, /* ANTTIME[15:8] 10010000 */
2045        0x1f0f, /* ANTTIME[7:0] 10010000 */
2046        0x1f11, /* SYNCTIME[23:16] 10011000 */
2047        0x1f12, /* SYNCTIME[15:8] 10010110 */
2048        0x1f13, /* SYNCTIME[7:0] 10000000 */
2049        0x1f14, /* SNRTIME[31:24] 00000001 */
2050        0x1f15, /* SNRTIME[23:16] 01111101 */
2051        0x1f16, /* SNRTIME[15:8] 01111000 */
2052        0x1f17, /* SNRTIME[7:0] 01000000 */
2053        0x1f19, /* FECTIME[23:16] 00000000 */
2054        0x1f1a, /* FECTIME[15:8] 01110010 */
2055        0x1f1b, /* FECTIME[7:0] 01110000 */
2056        0x1f1d, /* FECTHD[7:0] 00000011 */
2057        0x1f1f, /* SNRTHD[23:16] 00001000 */
2058        0x1f20, /* SNRTHD[15:8] 01111111 */
2059        0x1f21, /* SNRTHD[7:0] 10000101 */
2060        0x1f80, /* IRQFLG x x SFSDRFLG MODEBFLG SAVEFLG SCANFLG TRACKFLG */
2061        0x1f81, /* x SYNCCON SNRCON FECCON x STDBUSY SYNCRST AGCFZCO */
2062        0x1f82, /* x x x SCANOPCD[4:0] */
2063        0x1f83, /* x x x x MAINOPCD[3:0] */
2064        0x1f84, /* x x RXDATA[13:8] */
2065        0x1f85, /* RXDATA[7:0] */
2066        0x1f86, /* x x SDTDATA[13:8] */
2067        0x1f87, /* SDTDATA[7:0] */
2068        0x1f89, /* ANTSNR[23:16] */
2069        0x1f8a, /* ANTSNR[15:8] */
2070        0x1f8b, /* ANTSNR[7:0] */
2071        0x1f8c, /* x x x x ANTFEC[13:8] */
2072        0x1f8d, /* ANTFEC[7:0] */
2073        0x1f8e, /* MAXCNT[7:0] */
2074        0x1f8f, /* SCANCNT[7:0] */
2075        0x1f91, /* MAXPW[23:16] */
2076        0x1f92, /* MAXPW[15:8] */
2077        0x1f93, /* MAXPW[7:0] */
2078        0x1f95, /* CURPWMSE[23:16] */
2079        0x1f96, /* CURPWMSE[15:8] */
2080        0x1f97, /* CURPWMSE[7:0] */
2081#endif /* SMART_ANT */
2082        0x211f, /* 1'b1 1'b1 1'b1 CIRQEN x x 1'b0 1'b0 1111xx00 */
2083        0x212a, /* EQAUTOST */
2084        0x2122, /* CHFAST[7:0] 01100000 */
2085        0x212b, /* FFFSTEP_V[3:0] x FBFSTEP_V[2:0] 0001x001 */
2086        0x212c, /* PHDEROTBWSEL[3:0] 1'b1 1'b1 1'b1 1'b0 10001110 */
2087        0x212d, /* 1'b1 1'b1 1'b1 1'b1 x x TPIFLOCKS */
2088        0x2135, /* DYNTRACKFDEQ[3:0] x 1'b0 1'b0 1'b0 1010x000 */
2089        0x2141, /* TRMODE[1:0] 1'b1 1'b1 1'b0 1'b1 1'b1 1'b1 01110111 */
2090        0x2162, /* AICCCTRLE */
2091        0x2173, /* PHNCNFCNT[7:0] 00000100 */
2092        0x2179, /* 1'b0 1'b0 1'b0 1'b1 x BADSINGLEDYNTRACKFBF[2:0] 0001x001 */
2093        0x217a, /* 1'b0 1'b0 1'b0 1'b1 x BADSLOWSINGLEDYNTRACKFBF[2:0] 0001x001 */
2094        0x217e, /* CNFCNTTPIF[7:0] 00001000 */
2095        0x217f, /* TPERRCNTTPIF[7:0] 00000001 */
2096        0x2180, /* x x x x x x FBDLYCIR[9:8] */
2097        0x2181, /* FBDLYCIR[7:0] */
2098        0x2185, /* MAXPWRMAIN[7:0] */
2099        0x2191, /* NCOMBDET x x x x x x x */
2100        0x2199, /* x MAINSTRON */
2101        0x219a, /* FFFEQSTEPOUT_V[3:0] FBFSTEPOUT_V[2:0] */
2102        0x21a1, /* x x SNRREF[5:0] */
2103        0x2845, /* 1'b0 1'b1 x x FFFSTEP_CQS[1:0] FFFCENTERTAP[1:0] 01xx1110 */
2104        0x2846, /* 1'b0 x 1'b0 1'b1 FBFSTEP_CQS[1:0] 1'b1 1'b0 0x011110 */
2105        0x2847, /* ENNOSIGDE */
2106        0x2849, /* 1'b1 1'b1 NOUSENOSI */
2107        0x284a, /* EQINITWAITTIME[7:0] 01100100 */
2108        0x3000, /* 1'b1 1'b1 1'b1 x x x 1'b0 RPTRSTM */
2109        0x3001, /* RPTRSTWAITTIME[7:0] (100msec) 00110010 */
2110        0x3031, /* FRAMELOC */
2111        0x3032, /* 1'b1 1'b0 1'b0 1'b0 x x FRAMELOCKMODE_CQS[1:0] 1000xx11 */
2112        0x30a9, /* VDLOCK_Q FRAMELOCK */
2113        0x30aa, /* MPEGLOCK */
2114};
2115
2116#define numDumpRegs (ARRAY_SIZE(regtab))
2117static u8 regval1[numDumpRegs] = {0, };
2118static u8 regval2[numDumpRegs] = {0, };
2119
2120static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state)
2121{
2122                memset(regval2, 0xff, sizeof(regval2));
2123                lgdt3306a_DumpRegs(state);
2124}
2125
2126static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state)
2127{
2128        int i;
2129        int sav_debug = debug;
2130
2131        if ((debug & DBG_DUMP) == 0)
2132                return;
2133        debug &= ~DBG_REG; /* suppress DBG_REG during reg dump */
2134
2135        lg_debug("\n");
2136
2137        for (i = 0; i < numDumpRegs; i++) {
2138                lgdt3306a_read_reg(state, regtab[i], &regval1[i]);
2139                if (regval1[i] != regval2[i]) {
2140                        lg_debug(" %04X = %02X\n", regtab[i], regval1[i]);
2141                        regval2[i] = regval1[i];
2142                }
2143        }
2144        debug = sav_debug;
2145}
2146#endif /* DBG_DUMP */
2147
2148
2149
2150static const struct dvb_frontend_ops lgdt3306a_ops = {
2151        .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
2152        .info = {
2153                .name = "LG Electronics LGDT3306A VSB/QAM Frontend",
2154                .frequency_min_hz      =  54 * MHz,
2155                .frequency_max_hz      = 858 * MHz,
2156                .frequency_stepsize_hz = 62500,
2157                .caps = FE_CAN_QAM_AUTO | FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
2158        },
2159        .i2c_gate_ctrl        = lgdt3306a_i2c_gate_ctrl,
2160        .init                 = lgdt3306a_init,
2161        .sleep                = lgdt3306a_fe_sleep,
2162        /* if this is set, it overrides the default swzigzag */
2163        .tune                 = lgdt3306a_tune,
2164        .set_frontend         = lgdt3306a_set_parameters,
2165        .get_frontend         = lgdt3306a_get_frontend,
2166        .get_frontend_algo    = lgdt3306a_get_frontend_algo,
2167        .get_tune_settings    = lgdt3306a_get_tune_settings,
2168        .read_status          = lgdt3306a_read_status,
2169        .read_ber             = lgdt3306a_read_ber,
2170        .read_signal_strength = lgdt3306a_read_signal_strength,
2171        .read_snr             = lgdt3306a_read_snr,
2172        .read_ucblocks        = lgdt3306a_read_ucblocks,
2173        .release              = lgdt3306a_release,
2174        .ts_bus_ctrl          = lgdt3306a_ts_bus_ctrl,
2175        .search               = lgdt3306a_search,
2176};
2177
2178static int lgdt3306a_select(struct i2c_mux_core *muxc, u32 chan)
2179{
2180        struct i2c_client *client = i2c_mux_priv(muxc);
2181        struct lgdt3306a_state *state = i2c_get_clientdata(client);
2182
2183        return lgdt3306a_i2c_gate_ctrl(&state->frontend, 1);
2184}
2185
2186static int lgdt3306a_deselect(struct i2c_mux_core *muxc, u32 chan)
2187{
2188        struct i2c_client *client = i2c_mux_priv(muxc);
2189        struct lgdt3306a_state *state = i2c_get_clientdata(client);
2190
2191        return lgdt3306a_i2c_gate_ctrl(&state->frontend, 0);
2192}
2193
2194static int lgdt3306a_probe(struct i2c_client *client,
2195                const struct i2c_device_id *id)
2196{
2197        struct lgdt3306a_config *config;
2198        struct lgdt3306a_state *state;
2199        struct dvb_frontend *fe;
2200        int ret;
2201
2202        config = kmemdup(client->dev.platform_data,
2203                         sizeof(struct lgdt3306a_config), GFP_KERNEL);
2204        if (config == NULL) {
2205                ret = -ENOMEM;
2206                goto fail;
2207        }
2208
2209        config->i2c_addr = client->addr;
2210        fe = lgdt3306a_attach(config, client->adapter);
2211        if (fe == NULL) {
2212                ret = -ENODEV;
2213                goto err_fe;
2214        }
2215
2216        i2c_set_clientdata(client, fe->demodulator_priv);
2217        state = fe->demodulator_priv;
2218        state->frontend.ops.release = NULL;
2219
2220        /* create mux i2c adapter for tuner */
2221        state->muxc = i2c_mux_alloc(client->adapter, &client->dev,
2222                                  1, 0, I2C_MUX_LOCKED,
2223                                  lgdt3306a_select, lgdt3306a_deselect);
2224        if (!state->muxc) {
2225                ret = -ENOMEM;
2226                goto err_kfree;
2227        }
2228        state->muxc->priv = client;
2229        ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
2230        if (ret)
2231                goto err_kfree;
2232
2233        /* create dvb_frontend */
2234        fe->ops.i2c_gate_ctrl = NULL;
2235        *config->i2c_adapter = state->muxc->adapter[0];
2236        *config->fe = fe;
2237
2238        dev_info(&client->dev, "LG Electronics LGDT3306A successfully identified\n");
2239
2240        return 0;
2241
2242err_kfree:
2243        kfree(state);
2244err_fe:
2245        kfree(config);
2246fail:
2247        dev_warn(&client->dev, "probe failed = %d\n", ret);
2248        return ret;
2249}
2250
2251static int lgdt3306a_remove(struct i2c_client *client)
2252{
2253        struct lgdt3306a_state *state = i2c_get_clientdata(client);
2254
2255        i2c_mux_del_adapters(state->muxc);
2256
2257        state->frontend.ops.release = NULL;
2258        state->frontend.demodulator_priv = NULL;
2259
2260        kfree(state->cfg);
2261        kfree(state);
2262
2263        return 0;
2264}
2265
2266static const struct i2c_device_id lgdt3306a_id_table[] = {
2267        {"lgdt3306a", 0},
2268        {}
2269};
2270MODULE_DEVICE_TABLE(i2c, lgdt3306a_id_table);
2271
2272static struct i2c_driver lgdt3306a_driver = {
2273        .driver = {
2274                .name                = "lgdt3306a",
2275                .suppress_bind_attrs = true,
2276        },
2277        .probe          = lgdt3306a_probe,
2278        .remove         = lgdt3306a_remove,
2279        .id_table       = lgdt3306a_id_table,
2280};
2281
2282module_i2c_driver(lgdt3306a_driver);
2283
2284MODULE_DESCRIPTION("LG Electronics LGDT3306A ATSC/QAM-B Demodulator Driver");
2285MODULE_AUTHOR("Fred Richter <frichter@hauppauge.com>");
2286MODULE_LICENSE("GPL");
2287MODULE_VERSION("0.2");
2288