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 <linux/int_log.h>
  16 #include "lgdt3306a.h"
  17 #include <linux/i2c-mux.h>
  18
  19
  20 static int debug;
  21 module_param(debug, int, 0644);
  22 MODULE_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  */
  31 static int forced_manual;
  32 module_param(forced_manual, int, 0644);
  33 MODULE_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
  63 struct 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
  88 enum lgdt3306a_lock_status {
  89         LG3306_UNLOCK       = 0x00,
  90         LG3306_LOCK         = 0x01,
  91         LG3306_UNKNOWN_LOCK = 0xff
  92 };
  93
  94 enum 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
 102 enum lgdt3306a_modulation {
 103         LG3306_VSB          = 0x00,
 104         LG3306_QAM64        = 0x01,
 105         LG3306_QAM256       = 0x02,
 106         LG3306_UNKNOWN_MODE = 0xff
 107 };
 108
 109 enum 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
 118 static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state);
 119 static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state);
 120 #endif
 121
 122
 123 static 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
 147 static 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
 182 static 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);
 199 fail:
 200         return ret;
 201 }
 202
 203 /* ------------------------------------------------------------------------ */
 204
 205 static 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
 219 fail:
 220         return ret;
 221 }
 222
 223 static 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
 256 fail:
 257         return ret;
 258 }
 259
 260 static 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
 283 fail:
 284         return ret;
 285 }
 286
 287 static 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
 329 fail:
 330         return ret;
 331 }
 332
 333 static 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
 343 static 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
 376 fail:
 377         return ret;
 378 }
 379
 380
 381 static 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");
 537 fail:
 538         return ret;
 539 }
 540
 541 static 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");
 636 fail:
 637         return ret;
 638 }
 639
 640 static 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
 664 fail:
 665         return ret;
 666 }
 667
 668 /* ------------------------------------------------------------------------ */
 669
 670 static 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
 691 static 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
 702 static 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
 714 static int lgdt3306a_set_if(struct lgdt3306a_state *state,
 715                            struct dtv_frontend_properties *p)
 716 {
 717         int ret;
 718         u16 if_freq_khz;
 719         u8 nco1, nco2;
 720
 721         switch (p->modulation) {
 722         case VSB_8:
 723                 if_freq_khz = state->cfg->vsb_if_khz;
 724                 break;
 725         case QAM_64:
 726         case QAM_256:
 727         case QAM_AUTO:
 728                 if_freq_khz = state->cfg->qam_if_khz;
 729                 break;
 730         default:
 731                 return -EINVAL;
 732         }
 733
 734         switch (if_freq_khz) {
 735         default:
 736                 pr_warn("IF=%d KHz is not supported, 3250 assumed\n",
 737                         if_freq_khz);
 738                 fallthrough;
 739         case 3250: /* 3.25Mhz */
 740                 nco1 = 0x34;
 741                 nco2 = 0x00;
 742                 break;
 743         case 3500: /* 3.50Mhz */
 744                 nco1 = 0x38;
 745                 nco2 = 0x00;
 746                 break;
 747         case 4000: /* 4.00Mhz */
 748                 nco1 = 0x40;
 749                 nco2 = 0x00;
 750                 break;
 751         case 5000: /* 5.00Mhz */
 752                 nco1 = 0x50;
 753                 nco2 = 0x00;
 754                 break;
 755         case 5380: /* 5.38Mhz */
 756                 nco1 = 0x56;
 757                 nco2 = 0x14;
 758                 break;
 759         }
 760         ret = lgdt3306a_write_reg(state, 0x0010, nco1);
 761         if (ret)
 762                 return ret;
 763         ret = lgdt3306a_write_reg(state, 0x0011, nco2);
 764         if (ret)
 765                 return ret;
 766
 767         dbg_info("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2);
 768
 769         return 0;
 770 }
 771
 772 /* ------------------------------------------------------------------------ */
 773
 774 static int lgdt3306a_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 775 {
 776         struct lgdt3306a_state *state = fe->demodulator_priv;
 777
 778         if (state->cfg->deny_i2c_rptr) {
 779                 dbg_info("deny_i2c_rptr=%d\n", state->cfg->deny_i2c_rptr);
 780                 return 0;
 781         }
 782         dbg_info("(%d)\n", enable);
 783
 784         /* NI2CRPTEN=0x80 */
 785         return lgdt3306a_set_reg_bit(state, 0x0002, 7, enable ? 0 : 1);
 786 }
 787
 788 static int lgdt3306a_sleep(struct lgdt3306a_state *state)
 789 {
 790         int ret;
 791
 792         dbg_info("\n");
 793         state->current_frequency = -1; /* force re-tune, when we wake */
 794
 795         ret = lgdt3306a_mpeg_tristate(state, 1); /* disable data bus */
 796         if (lg_chkerr(ret))
 797                 goto fail;
 798
 799         ret = lgdt3306a_power(state, 0); /* power down */
 800         lg_chkerr(ret);
 801
 802 fail:
 803         return 0;
 804 }
 805
 806 static int lgdt3306a_fe_sleep(struct dvb_frontend *fe)
 807 {
 808         struct lgdt3306a_state *state = fe->demodulator_priv;
 809
 810         return lgdt3306a_sleep(state);
 811 }
 812
 813 static int lgdt3306a_init(struct dvb_frontend *fe)
 814 {
 815         struct lgdt3306a_state *state = fe->demodulator_priv;
 816         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 817         u8 val;
 818         int ret;
 819
 820         dbg_info("\n");
 821
 822         /* 1. Normal operation mode */
 823         ret = lgdt3306a_set_reg_bit(state, 0x0001, 0, 1); /* SIMFASTENB=0x01 */
 824         if (lg_chkerr(ret))
 825                 goto fail;
 826
 827         /* 2. Spectrum inversion auto detection (Not valid for VSB) */
 828         ret = lgdt3306a_set_inversion_auto(state, 0);
 829         if (lg_chkerr(ret))
 830                 goto fail;
 831
 832         /* 3. Spectrum inversion(According to the tuner configuration) */
 833         ret = lgdt3306a_set_inversion(state, 1);
 834         if (lg_chkerr(ret))
 835                 goto fail;
 836
 837         /* 4. Peak-to-peak voltage of ADC input signal */
 838
 839         /* ADCSEL1V=0x80=1Vpp; 0x00=2Vpp */
 840         ret = lgdt3306a_set_reg_bit(state, 0x0004, 7, 1);
 841         if (lg_chkerr(ret))
 842                 goto fail;
 843
 844         /* 5. ADC output data capture clock phase */
 845
 846         /* 0=same phase as ADC clock */
 847         ret = lgdt3306a_set_reg_bit(state, 0x0004, 2, 0);
 848         if (lg_chkerr(ret))
 849                 goto fail;
 850
 851         /* 5a. ADC sampling clock source */
 852
 853         /* ADCCLKPLLSEL=0x08; 0=use ext clock, not PLL */
 854         ret = lgdt3306a_set_reg_bit(state, 0x0004, 3, 0);
 855         if (lg_chkerr(ret))
 856                 goto fail;
 857
 858         /* 6. Automatic PLL set */
 859
 860         /* PLLSETAUTO=0x40; 0=off */
 861         ret = lgdt3306a_set_reg_bit(state, 0x0005, 6, 0);
 862         if (lg_chkerr(ret))
 863                 goto fail;
 864
 865         if (state->cfg->xtalMHz == 24) {        /* 24MHz */
 866                 /* 7. Frequency for PLL output(0x2564 for 192MHz for 24MHz) */
 867                 ret = lgdt3306a_read_reg(state, 0x0005, &val);
 868                 if (lg_chkerr(ret))
 869                         goto fail;
 870                 val &= 0xc0;
 871                 val |= 0x25;
 872                 ret = lgdt3306a_write_reg(state, 0x0005, val);
 873                 if (lg_chkerr(ret))
 874                         goto fail;
 875                 ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
 876                 if (lg_chkerr(ret))
 877                         goto fail;
 878
 879                 /* 8. ADC sampling frequency(0x180000 for 24MHz sampling) */
 880                 ret = lgdt3306a_read_reg(state, 0x000d, &val);
 881                 if (lg_chkerr(ret))
 882                         goto fail;
 883                 val &= 0xc0;
 884                 val |= 0x18;
 885                 ret = lgdt3306a_write_reg(state, 0x000d, val);
 886                 if (lg_chkerr(ret))
 887                         goto fail;
 888
 889         } else if (state->cfg->xtalMHz == 25) { /* 25MHz */
 890                 /* 7. Frequency for PLL output */
 891                 ret = lgdt3306a_read_reg(state, 0x0005, &val);
 892                 if (lg_chkerr(ret))
 893                         goto fail;
 894                 val &= 0xc0;
 895                 val |= 0x25;
 896                 ret = lgdt3306a_write_reg(state, 0x0005, val);
 897                 if (lg_chkerr(ret))
 898                         goto fail;
 899                 ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
 900                 if (lg_chkerr(ret))
 901                         goto fail;
 902
 903                 /* 8. ADC sampling frequency(0x190000 for 25MHz sampling) */
 904                 ret = lgdt3306a_read_reg(state, 0x000d, &val);
 905                 if (lg_chkerr(ret))
 906                         goto fail;
 907                 val &= 0xc0;
 908                 val |= 0x19;
 909                 ret = lgdt3306a_write_reg(state, 0x000d, val);
 910                 if (lg_chkerr(ret))
 911                         goto fail;
 912         } else {
 913                 pr_err("Bad xtalMHz=%d\n", state->cfg->xtalMHz);
 914         }
 915 #if 0
 916         ret = lgdt3306a_write_reg(state, 0x000e, 0x00);
 917         ret = lgdt3306a_write_reg(state, 0x000f, 0x00);
 918 #endif
 919
 920         /* 9. Center frequency of input signal of ADC */
 921         ret = lgdt3306a_write_reg(state, 0x0010, 0x34); /* 3.25MHz */
 922         ret = lgdt3306a_write_reg(state, 0x0011, 0x00);
 923
 924         /* 10. Fixed gain error value */
 925         ret = lgdt3306a_write_reg(state, 0x0014, 0); /* gain error=0 */
 926
 927         /* 10a. VSB TR BW gear shift initial step */
 928         ret = lgdt3306a_read_reg(state, 0x103c, &val);
 929         val &= 0x0f;
 930         val |= 0x20; /* SAMGSAUTOSTL_V[3:0] = 2 */
 931         ret = lgdt3306a_write_reg(state, 0x103c, val);
 932
 933         /* 10b. Timing offset calibration in low temperature for VSB */
 934         ret = lgdt3306a_read_reg(state, 0x103d, &val);
 935         val &= 0xfc;
 936         val |= 0x03;
 937         ret = lgdt3306a_write_reg(state, 0x103d, val);
 938
 939         /* 10c. Timing offset calibration in low temperature for QAM */
 940         ret = lgdt3306a_read_reg(state, 0x1036, &val);
 941         val &= 0xf0;
 942         val |= 0x0c;
 943         ret = lgdt3306a_write_reg(state, 0x1036, val);
 944
 945         /* 11. Using the imaginary part of CIR in CIR loading */
 946         ret = lgdt3306a_read_reg(state, 0x211f, &val);
 947         val &= 0xef; /* do not use imaginary of CIR */
 948         ret = lgdt3306a_write_reg(state, 0x211f, val);
 949
 950         /* 12. Control of no signal detector function */
 951         ret = lgdt3306a_read_reg(state, 0x2849, &val);
 952         val &= 0xef; /* NOUSENOSIGDET=0, enable no signal detector */
 953         ret = lgdt3306a_write_reg(state, 0x2849, val);
 954
 955         /* FGR - put demod in some known mode */
 956         ret = lgdt3306a_set_vsb(state);
 957
 958         /* 13. TP stream format */
 959         ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
 960
 961         /* 14. disable output buses */
 962         ret = lgdt3306a_mpeg_tristate(state, 1);
 963
 964         /* 15. Sleep (in reset) */
 965         ret = lgdt3306a_sleep(state);
 966         lg_chkerr(ret);
 967
 968         c->cnr.len = 1;
 969         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 970
 971 fail:
 972         return ret;
 973 }
 974
 975 static int lgdt3306a_set_parameters(struct dvb_frontend *fe)
 976 {
 977         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 978         struct lgdt3306a_state *state = fe->demodulator_priv;
 979         int ret;
 980
 981         dbg_info("(%d, %d)\n", p->frequency, p->modulation);
 982
 983         if (state->current_frequency  == p->frequency &&
 984            state->current_modulation == p->modulation) {
 985                 dbg_info(" (already set, skipping ...)\n");
 986                 return 0;
 987         }
 988         state->current_frequency = -1;
 989         state->current_modulation = -1;
 990
 991         ret = lgdt3306a_power(state, 1); /* power up */
 992         if (lg_chkerr(ret))
 993                 goto fail;
 994
 995         if (fe->ops.tuner_ops.set_params) {
 996                 ret = fe->ops.tuner_ops.set_params(fe);
 997                 if (fe->ops.i2c_gate_ctrl)
 998                         fe->ops.i2c_gate_ctrl(fe, 0);
 999 #if 0
1000                 if (lg_chkerr(ret))
1001                         goto fail;
1002                 state->current_frequency = p->frequency;
1003 #endif
1004         }
1005
1006         ret = lgdt3306a_set_modulation(state, p);
1007         if (lg_chkerr(ret))
1008                 goto fail;
1009
1010         ret = lgdt3306a_agc_setup(state, p);
1011         if (lg_chkerr(ret))
1012                 goto fail;
1013
1014         ret = lgdt3306a_set_if(state, p);
1015         if (lg_chkerr(ret))
1016                 goto fail;
1017
1018         /* spectral_inversion defaults already set for VSB and QAM */
1019
1020         ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
1021         if (lg_chkerr(ret))
1022                 goto fail;
1023
1024         ret = lgdt3306a_mpeg_mode_polarity(state,
1025                                           state->cfg->tpclk_edge,
1026                                           state->cfg->tpvalid_polarity);
1027         if (lg_chkerr(ret))
1028                 goto fail;
1029
1030         ret = lgdt3306a_mpeg_tristate(state, 0); /* enable data bus */
1031         if (lg_chkerr(ret))
1032                 goto fail;
1033
1034         ret = lgdt3306a_soft_reset(state);
1035         if (lg_chkerr(ret))
1036                 goto fail;
1037
1038 #ifdef DBG_DUMP
1039         lgdt3306a_DumpAllRegs(state);
1040 #endif
1041         state->current_frequency = p->frequency;
1042 fail:
1043         return ret;
1044 }
1045
1046 static int lgdt3306a_get_frontend(struct dvb_frontend *fe,
1047                                   struct dtv_frontend_properties *p)
1048 {
1049         struct lgdt3306a_state *state = fe->demodulator_priv;
1050
1051         dbg_info("(%u, %d)\n",
1052                  state->current_frequency, state->current_modulation);
1053
1054         p->modulation = state->current_modulation;
1055         p->frequency = state->current_frequency;
1056         return 0;
1057 }
1058
1059 static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe)
1060 {
1061 #if 1
1062         return DVBFE_ALGO_CUSTOM;
1063 #else
1064         return DVBFE_ALGO_HW;
1065 #endif
1066 }
1067
1068 /* ------------------------------------------------------------------------ */
1069 static int lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
1070 {
1071         u8 val;
1072         int ret;
1073         u8 snrRef, maxPowerMan, nCombDet;
1074         u16 fbDlyCir;
1075
1076         ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1077         if (ret)
1078                 return ret;
1079         snrRef = val & 0x3f;
1080
1081         ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan);
1082         if (ret)
1083                 return ret;
1084
1085         ret = lgdt3306a_read_reg(state, 0x2191, &val);
1086         if (ret)
1087                 return ret;
1088         nCombDet = (val & 0x80) >> 7;
1089
1090         ret = lgdt3306a_read_reg(state, 0x2180, &val);
1091         if (ret)
1092                 return ret;
1093         fbDlyCir = (val & 0x03) << 8;
1094
1095         ret = lgdt3306a_read_reg(state, 0x2181, &val);
1096         if (ret)
1097                 return ret;
1098         fbDlyCir |= val;
1099
1100         dbg_info("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n",
1101                 snrRef, maxPowerMan, nCombDet, fbDlyCir);
1102
1103         /* Carrier offset sub loop bandwidth */
1104         ret = lgdt3306a_read_reg(state, 0x1061, &val);
1105         if (ret)
1106                 return ret;
1107         val &= 0xf8;
1108         if ((snrRef > 18) && (maxPowerMan > 0x68)
1109             && (nCombDet == 0x01)
1110             && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) {
1111                 /* SNR is over 18dB and no ghosting */
1112                 val |= 0x00; /* final bandwidth = 0 */
1113         } else {
1114                 val |= 0x04; /* final bandwidth = 4 */
1115         }
1116         ret = lgdt3306a_write_reg(state, 0x1061, val);
1117         if (ret)
1118                 return ret;
1119
1120         /* Adjust Notch Filter */
1121         ret = lgdt3306a_read_reg(state, 0x0024, &val);
1122         if (ret)
1123                 return ret;
1124         val &= 0x0f;
1125         if (nCombDet == 0) { /* Turn on the Notch Filter */
1126                 val |= 0x50;
1127         }
1128         ret = lgdt3306a_write_reg(state, 0x0024, val);
1129         if (ret)
1130                 return ret;
1131
1132         /* VSB Timing Recovery output normalization */
1133         ret = lgdt3306a_read_reg(state, 0x103d, &val);
1134         if (ret)
1135                 return ret;
1136         val &= 0xcf;
1137         val |= 0x20;
1138         ret = lgdt3306a_write_reg(state, 0x103d, val);
1139
1140         return ret;
1141 }
1142
1143 static enum lgdt3306a_modulation
1144 lgdt3306a_check_oper_mode(struct lgdt3306a_state *state)
1145 {
1146         u8 val = 0;
1147         int ret;
1148
1149         ret = lgdt3306a_read_reg(state, 0x0081, &val);
1150         if (ret)
1151                 goto err;
1152
1153         if (val & 0x80) {
1154                 dbg_info("VSB\n");
1155                 return LG3306_VSB;
1156         }
1157         if (val & 0x08) {
1158                 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1159                 if (ret)
1160                         goto err;
1161                 val = val >> 2;
1162                 if (val & 0x01) {
1163                         dbg_info("QAM256\n");
1164                         return LG3306_QAM256;
1165                 }
1166                 dbg_info("QAM64\n");
1167                 return LG3306_QAM64;
1168         }
1169 err:
1170         pr_warn("UNKNOWN\n");
1171         return LG3306_UNKNOWN_MODE;
1172 }
1173
1174 static enum lgdt3306a_lock_status
1175 lgdt3306a_check_lock_status(struct lgdt3306a_state *state,
1176                             enum lgdt3306a_lock_check whatLock)
1177 {
1178         u8 val = 0;
1179         int ret;
1180         enum lgdt3306a_modulation       modeOper;
1181         enum lgdt3306a_lock_status lockStatus;
1182
1183         modeOper = LG3306_UNKNOWN_MODE;
1184
1185         switch (whatLock) {
1186         case LG3306_SYNC_LOCK:
1187         {
1188                 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1189                 if (ret)
1190                         return ret;
1191
1192                 if ((val & 0x80) == 0x80)
1193                         lockStatus = LG3306_LOCK;
1194                 else
1195                         lockStatus = LG3306_UNLOCK;
1196
1197                 dbg_info("SYNC_LOCK=%x\n", lockStatus);
1198                 break;
1199         }
1200         case LG3306_AGC_LOCK:
1201         {
1202                 ret = lgdt3306a_read_reg(state, 0x0080, &val);
1203                 if (ret)
1204                         return ret;
1205
1206                 if ((val & 0x40) == 0x40)
1207                         lockStatus = LG3306_LOCK;
1208                 else
1209                         lockStatus = LG3306_UNLOCK;
1210
1211                 dbg_info("AGC_LOCK=%x\n", lockStatus);
1212                 break;
1213         }
1214         case LG3306_TR_LOCK:
1215         {
1216                 modeOper = lgdt3306a_check_oper_mode(state);
1217                 if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1218                         ret = lgdt3306a_read_reg(state, 0x1094, &val);
1219                         if (ret)
1220                                 return ret;
1221
1222                         if ((val & 0x80) == 0x80)
1223                                 lockStatus = LG3306_LOCK;
1224                         else
1225                                 lockStatus = LG3306_UNLOCK;
1226                 } else
1227                         lockStatus = LG3306_UNKNOWN_LOCK;
1228
1229                 dbg_info("TR_LOCK=%x\n", lockStatus);
1230                 break;
1231         }
1232         case LG3306_FEC_LOCK:
1233         {
1234                 modeOper = lgdt3306a_check_oper_mode(state);
1235                 if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1236                         ret = lgdt3306a_read_reg(state, 0x0080, &val);
1237                         if (ret)
1238                                 return ret;
1239
1240                         if ((val & 0x10) == 0x10)
1241                                 lockStatus = LG3306_LOCK;
1242                         else
1243                                 lockStatus = LG3306_UNLOCK;
1244                 } else
1245                         lockStatus = LG3306_UNKNOWN_LOCK;
1246
1247                 dbg_info("FEC_LOCK=%x\n", lockStatus);
1248                 break;
1249         }
1250
1251         default:
1252                 lockStatus = LG3306_UNKNOWN_LOCK;
1253                 pr_warn("UNKNOWN whatLock=%d\n", whatLock);
1254                 break;
1255         }
1256
1257         return lockStatus;
1258 }
1259
1260 static enum lgdt3306a_neverlock_status
1261 lgdt3306a_check_neverlock_status(struct lgdt3306a_state *state)
1262 {
1263         u8 val = 0;
1264         int ret;
1265         enum lgdt3306a_neverlock_status lockStatus;
1266
1267         ret = lgdt3306a_read_reg(state, 0x0080, &val);
1268         if (ret)
1269                 return ret;
1270         lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03);
1271
1272         dbg_info("NeverLock=%d", lockStatus);
1273
1274         return lockStatus;
1275 }
1276
1277 static int lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
1278 {
1279         u8 val = 0;
1280         int ret;
1281         u8 currChDiffACQ, snrRef, mainStrong, aiccrejStatus;
1282
1283         /* Channel variation */
1284         ret = lgdt3306a_read_reg(state, 0x21bc, &currChDiffACQ);
1285         if (ret)
1286                 return ret;
1287
1288         /* SNR of Frame sync */
1289         ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1290         if (ret)
1291                 return ret;
1292         snrRef = val & 0x3f;
1293
1294         /* Strong Main CIR */
1295         ret = lgdt3306a_read_reg(state, 0x2199, &val);
1296         if (ret)
1297                 return ret;
1298         mainStrong = (val & 0x40) >> 6;
1299
1300         ret = lgdt3306a_read_reg(state, 0x0090, &val);
1301         if (ret)
1302                 return ret;
1303         aiccrejStatus = (val & 0xf0) >> 4;
1304
1305         dbg_info("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n",
1306                 snrRef, mainStrong, aiccrejStatus, currChDiffACQ);
1307
1308 #if 0
1309         /* Dynamic ghost exists */
1310         if ((mainStrong == 0) && (currChDiffACQ > 0x70))
1311 #endif
1312         if (mainStrong == 0) {
1313                 ret = lgdt3306a_read_reg(state, 0x2135, &val);
1314                 if (ret)
1315                         return ret;
1316                 val &= 0x0f;
1317                 val |= 0xa0;
1318                 ret = lgdt3306a_write_reg(state, 0x2135, val);
1319                 if (ret)
1320                         return ret;
1321
1322                 ret = lgdt3306a_read_reg(state, 0x2141, &val);
1323                 if (ret)
1324                         return ret;
1325                 val &= 0x3f;
1326                 val |= 0x80;
1327                 ret = lgdt3306a_write_reg(state, 0x2141, val);
1328                 if (ret)
1329                         return ret;
1330
1331                 ret = lgdt3306a_write_reg(state, 0x2122, 0x70);
1332                 if (ret)
1333                         return ret;
1334         } else { /* Weak ghost or static channel */
1335                 ret = lgdt3306a_read_reg(state, 0x2135, &val);
1336                 if (ret)
1337                         return ret;
1338                 val &= 0x0f;
1339                 val |= 0x70;
1340                 ret = lgdt3306a_write_reg(state, 0x2135, val);
1341                 if (ret)
1342                         return ret;
1343
1344                 ret = lgdt3306a_read_reg(state, 0x2141, &val);
1345                 if (ret)
1346                         return ret;
1347                 val &= 0x3f;
1348                 val |= 0x40;
1349                 ret = lgdt3306a_write_reg(state, 0x2141, val);
1350                 if (ret)
1351                         return ret;
1352
1353                 ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
1354                 if (ret)
1355                         return ret;
1356         }
1357         return 0;
1358 }
1359
1360 static enum lgdt3306a_lock_status
1361 lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state)
1362 {
1363         enum lgdt3306a_lock_status syncLockStatus = LG3306_UNLOCK;
1364         int     i;
1365
1366         for (i = 0; i < 2; i++) {
1367                 msleep(30);
1368
1369                 syncLockStatus = lgdt3306a_check_lock_status(state,
1370                                                              LG3306_SYNC_LOCK);
1371
1372                 if (syncLockStatus == LG3306_LOCK) {
1373                         dbg_info("locked(%d)\n", i);
1374                         return LG3306_LOCK;
1375                 }
1376         }
1377         dbg_info("not locked\n");
1378         return LG3306_UNLOCK;
1379 }
1380
1381 static enum lgdt3306a_lock_status
1382 lgdt3306a_fec_lock_poll(struct lgdt3306a_state *state)
1383 {
1384         enum lgdt3306a_lock_status FECLockStatus = LG3306_UNLOCK;
1385         int     i;
1386
1387         for (i = 0; i < 2; i++) {
1388                 msleep(30);
1389
1390                 FECLockStatus = lgdt3306a_check_lock_status(state,
1391                                                             LG3306_FEC_LOCK);
1392
1393                 if (FECLockStatus == LG3306_LOCK) {
1394                         dbg_info("locked(%d)\n", i);
1395                         return FECLockStatus;
1396                 }
1397         }
1398         dbg_info("not locked\n");
1399         return FECLockStatus;
1400 }
1401
1402 static enum lgdt3306a_neverlock_status
1403 lgdt3306a_neverlock_poll(struct lgdt3306a_state *state)
1404 {
1405         enum lgdt3306a_neverlock_status NLLockStatus = LG3306_NL_FAIL;
1406         int     i;
1407
1408         for (i = 0; i < 5; i++) {
1409                 msleep(30);
1410
1411                 NLLockStatus = lgdt3306a_check_neverlock_status(state);
1412
1413                 if (NLLockStatus == LG3306_NL_LOCK) {
1414                         dbg_info("NL_LOCK(%d)\n", i);
1415                         return NLLockStatus;
1416                 }
1417         }
1418         dbg_info("NLLockStatus=%d\n", NLLockStatus);
1419         return NLLockStatus;
1420 }
1421
1422 static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state)
1423 {
1424         u8 val;
1425         int ret;
1426
1427         ret = lgdt3306a_read_reg(state, 0x00fa, &val);
1428         if (ret)
1429                 return ret;
1430
1431         return val;
1432 }
1433
1434 static const u32 valx_x10[] = {
1435         10,  11,  13,  15,  17,  20,  25,  33,  41,  50,  59,  73,  87,  100
1436 };
1437 static const u32 log10x_x1000[] = {
1438         0,   41, 114, 176, 230, 301, 398, 518, 613, 699, 771, 863, 939, 1000
1439 };
1440
1441 static u32 log10_x1000(u32 x)
1442 {
1443         u32 diff_val, step_val, step_log10;
1444         u32 log_val = 0;
1445         u32 i;
1446
1447         if (x <= 0)
1448                 return -1000000; /* signal error */
1449
1450         if (x == 10)
1451                 return 0; /* log(1)=0 */
1452
1453         if (x < 10) {
1454                 while (x < 10) {
1455                         x = x * 10;
1456                         log_val--;
1457                 }
1458         } else {        /* x > 10 */
1459                 while (x >= 100) {
1460                         x = x / 10;
1461                         log_val++;
1462                 }
1463         }
1464         log_val *= 1000;
1465
1466         if (x == 10) /* was our input an exact multiple of 10 */
1467                 return log_val; /* don't need to interpolate */
1468
1469         /* find our place on the log curve */
1470         for (i = 1; i < ARRAY_SIZE(valx_x10); i++) {
1471                 if (valx_x10[i] >= x)
1472                         break;
1473         }
1474         if (i == ARRAY_SIZE(valx_x10))
1475                 return log_val + log10x_x1000[i - 1];
1476
1477         diff_val   = x - valx_x10[i-1];
1478         step_val   = valx_x10[i] - valx_x10[i - 1];
1479         step_log10 = log10x_x1000[i] - log10x_x1000[i - 1];
1480
1481         /* do a linear interpolation to get in-between values */
1482         return log_val + log10x_x1000[i - 1] +
1483                 ((diff_val*step_log10) / step_val);
1484 }
1485
1486 static u32 lgdt3306a_calculate_snr_x100(struct lgdt3306a_state *state)
1487 {
1488         u32 mse; /* Mean-Square Error */
1489         u32 pwr; /* Constelation power */
1490         u32 snr_x100;
1491
1492         mse = (read_reg(state, 0x00ec) << 8) |
1493               (read_reg(state, 0x00ed));
1494         pwr = (read_reg(state, 0x00e8) << 8) |
1495               (read_reg(state, 0x00e9));
1496
1497         if (mse == 0) /* no signal */
1498                 return 0;
1499
1500         snr_x100 = log10_x1000((pwr * 10000) / mse) - 3000;
1501         dbg_info("mse=%u, pwr=%u, snr_x100=%d\n", mse, pwr, snr_x100);
1502
1503         return snr_x100;
1504 }
1505
1506 static enum lgdt3306a_lock_status
1507 lgdt3306a_vsb_lock_poll(struct lgdt3306a_state *state)
1508 {
1509         int ret;
1510         u8 cnt = 0;
1511         u8 packet_error;
1512         u32 snr;
1513
1514         for (cnt = 0; cnt < 10; cnt++) {
1515                 if (lgdt3306a_sync_lock_poll(state) == LG3306_UNLOCK) {
1516                         dbg_info("no sync lock!\n");
1517                         return LG3306_UNLOCK;
1518                 }
1519
1520                 msleep(20);
1521                 ret = lgdt3306a_pre_monitoring(state);
1522                 if (ret)
1523                         break;
1524
1525                 packet_error = lgdt3306a_get_packet_error(state);
1526                 snr = lgdt3306a_calculate_snr_x100(state);
1527                 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1528
1529                 if ((snr >= 1500) && (packet_error < 0xff))
1530                         return LG3306_LOCK;
1531         }
1532
1533         dbg_info("not locked!\n");
1534         return LG3306_UNLOCK;
1535 }
1536
1537 static enum lgdt3306a_lock_status
1538 lgdt3306a_qam_lock_poll(struct lgdt3306a_state *state)
1539 {
1540         u8 cnt;
1541         u8 packet_error;
1542         u32     snr;
1543
1544         for (cnt = 0; cnt < 10; cnt++) {
1545                 if (lgdt3306a_fec_lock_poll(state) == LG3306_UNLOCK) {
1546                         dbg_info("no fec lock!\n");
1547                         return LG3306_UNLOCK;
1548                 }
1549
1550                 msleep(20);
1551
1552                 packet_error = lgdt3306a_get_packet_error(state);
1553                 snr = lgdt3306a_calculate_snr_x100(state);
1554                 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1555
1556                 if ((snr >= 1500) && (packet_error < 0xff))
1557                         return LG3306_LOCK;
1558         }
1559
1560         dbg_info("not locked!\n");
1561         return LG3306_UNLOCK;
1562 }
1563
1564 static int lgdt3306a_read_status(struct dvb_frontend *fe,
1565                                  enum fe_status *status)
1566 {
1567         struct lgdt3306a_state *state = fe->demodulator_priv;
1568         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1569         u16 strength = 0;
1570         int ret = 0;
1571
1572         if (fe->ops.tuner_ops.get_rf_strength) {
1573                 ret = fe->ops.tuner_ops.get_rf_strength(fe, &strength);
1574                 if (ret == 0)
1575                         dbg_info("strength=%d\n", strength);
1576                 else
1577                         dbg_info("fe->ops.tuner_ops.get_rf_strength() failed\n");
1578         }
1579
1580         *status = 0;
1581         if (lgdt3306a_neverlock_poll(state) == LG3306_NL_LOCK) {
1582                 *status |= FE_HAS_SIGNAL;
1583                 *status |= FE_HAS_CARRIER;
1584
1585                 switch (state->current_modulation) {
1586                 case QAM_256:
1587                 case QAM_64:
1588                 case QAM_AUTO:
1589                         if (lgdt3306a_qam_lock_poll(state) == LG3306_LOCK) {
1590                                 *status |= FE_HAS_VITERBI;
1591                                 *status |= FE_HAS_SYNC;
1592
1593                                 *status |= FE_HAS_LOCK;
1594                         }
1595                         break;
1596                 case VSB_8:
1597                         if (lgdt3306a_vsb_lock_poll(state) == LG3306_LOCK) {
1598                                 *status |= FE_HAS_VITERBI;
1599                                 *status |= FE_HAS_SYNC;
1600
1601                                 *status |= FE_HAS_LOCK;
1602
1603                                 ret = lgdt3306a_monitor_vsb(state);
1604                         }
1605                         break;
1606                 default:
1607                         ret = -EINVAL;
1608                 }
1609
1610                 if (*status & FE_HAS_SYNC) {
1611                         c->cnr.len = 1;
1612                         c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1613                         c->cnr.stat[0].svalue = lgdt3306a_calculate_snr_x100(state) * 10;
1614                 } else {
1615                         c->cnr.len = 1;
1616                         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1617                 }
1618         }
1619         return ret;
1620 }
1621
1622
1623 static int lgdt3306a_read_snr(struct dvb_frontend *fe, u16 *snr)
1624 {
1625         struct lgdt3306a_state *state = fe->demodulator_priv;
1626
1627         state->snr = lgdt3306a_calculate_snr_x100(state);
1628         /* report SNR in dB * 10 */
1629         *snr = state->snr/10;
1630
1631         return 0;
1632 }
1633
1634 static int lgdt3306a_read_signal_strength(struct dvb_frontend *fe,
1635                                          u16 *strength)
1636 {
1637         /*
1638          * Calculate some sort of "strength" from SNR
1639          */
1640         struct lgdt3306a_state *state = fe->demodulator_priv;
1641         u8 val;
1642         u16 snr; /* snr_x10 */
1643         int ret;
1644         u32 ref_snr; /* snr*100 */
1645         u32 str;
1646
1647         *strength = 0;
1648
1649         switch (state->current_modulation) {
1650         case VSB_8:
1651                  ref_snr = 1600; /* 16dB */
1652                  break;
1653         case QAM_64:
1654         case QAM_256:
1655         case QAM_AUTO:
1656                 /* need to know actual modulation to set proper SNR baseline */
1657                 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1658                 if (lg_chkerr(ret))
1659                         goto fail;
1660
1661                 if(val & 0x04)
1662                         ref_snr = 2800; /* QAM-256 28dB */
1663                 else
1664                         ref_snr = 2200; /* QAM-64  22dB */
1665                 break;
1666         default:
1667                 return -EINVAL;
1668         }
1669
1670         ret = fe->ops.read_snr(fe, &snr);
1671         if (lg_chkerr(ret))
1672                 goto fail;
1673
1674         if (state->snr <= (ref_snr - 100))
1675                 str = 0;
1676         else if (state->snr <= ref_snr)
1677                 str = (0xffff * 65) / 100; /* 65% */
1678         else {
1679                 str = state->snr - ref_snr;
1680                 str /= 50;
1681                 str += 78; /* 78%-100% */
1682                 if (str > 100)
1683                         str = 100;
1684                 str = (0xffff * str) / 100;
1685         }
1686         *strength = (u16)str;
1687         dbg_info("strength=%u\n", *strength);
1688
1689 fail:
1690         return ret;
1691 }
1692
1693 /* ------------------------------------------------------------------------ */
1694
1695 static int lgdt3306a_read_ber(struct dvb_frontend *fe, u32 *ber)
1696 {
1697         struct lgdt3306a_state *state = fe->demodulator_priv;
1698         u32 tmp;
1699
1700         *ber = 0;
1701 #if 1
1702         /* FGR - FIXME - I don't know what value is expected by dvb_core
1703          * what is the scale of the value?? */
1704         tmp =              read_reg(state, 0x00fc); /* NBERVALUE[24-31] */
1705         tmp = (tmp << 8) | read_reg(state, 0x00fd); /* NBERVALUE[16-23] */
1706         tmp = (tmp << 8) | read_reg(state, 0x00fe); /* NBERVALUE[8-15] */
1707         tmp = (tmp << 8) | read_reg(state, 0x00ff); /* NBERVALUE[0-7] */
1708         *ber = tmp;
1709         dbg_info("ber=%u\n", tmp);
1710 #endif
1711         return 0;
1712 }
1713
1714 static int lgdt3306a_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1715 {
1716         struct lgdt3306a_state *state = fe->demodulator_priv;
1717
1718         *ucblocks = 0;
1719 #if 1
1720         /* FGR - FIXME - I don't know what value is expected by dvb_core
1721          * what happens when value wraps? */
1722         *ucblocks = read_reg(state, 0x00f4); /* TPIFTPERRCNT[0-7] */
1723         dbg_info("ucblocks=%u\n", *ucblocks);
1724 #endif
1725
1726         return 0;
1727 }
1728
1729 static int lgdt3306a_tune(struct dvb_frontend *fe, bool re_tune,
1730                           unsigned int mode_flags, unsigned int *delay,
1731                           enum fe_status *status)
1732 {
1733         int ret = 0;
1734         struct lgdt3306a_state *state = fe->demodulator_priv;
1735
1736         dbg_info("re_tune=%u\n", re_tune);
1737
1738         if (re_tune) {
1739                 state->current_frequency = -1; /* force re-tune */
1740                 ret = lgdt3306a_set_parameters(fe);
1741                 if (ret != 0)
1742                         return ret;
1743         }
1744         *delay = 125;
1745         ret = lgdt3306a_read_status(fe, status);
1746
1747         return ret;
1748 }
1749
1750 static int lgdt3306a_get_tune_settings(struct dvb_frontend *fe,
1751                                        struct dvb_frontend_tune_settings
1752                                        *fe_tune_settings)
1753 {
1754         fe_tune_settings->min_delay_ms = 100;
1755         dbg_info("\n");
1756         return 0;
1757 }
1758
1759 static enum dvbfe_search lgdt3306a_search(struct dvb_frontend *fe)
1760 {
1761         enum fe_status status = 0;
1762         int ret;
1763
1764         /* set frontend */
1765         ret = lgdt3306a_set_parameters(fe);
1766         if (ret)
1767                 goto error;
1768
1769         ret = lgdt3306a_read_status(fe, &status);
1770         if (ret)
1771                 goto error;
1772
1773         /* check if we have a valid signal */
1774         if (status & FE_HAS_LOCK)
1775                 return DVBFE_ALGO_SEARCH_SUCCESS;
1776         else
1777                 return DVBFE_ALGO_SEARCH_AGAIN;
1778
1779 error:
1780         dbg_info("failed (%d)\n", ret);
1781         return DVBFE_ALGO_SEARCH_ERROR;
1782 }
1783
1784 static void lgdt3306a_release(struct dvb_frontend *fe)
1785 {
1786         struct lgdt3306a_state *state = fe->demodulator_priv;
1787
1788         dbg_info("\n");
1789         kfree(state);
1790 }
1791
1792 static const struct dvb_frontend_ops lgdt3306a_ops;
1793
1794 struct dvb_frontend *lgdt3306a_attach(const struct lgdt3306a_config *config,
1795                                       struct i2c_adapter *i2c_adap)
1796 {
1797         struct lgdt3306a_state *state = NULL;
1798         int ret;
1799         u8 val;
1800
1801         dbg_info("(%d-%04x)\n",
1802                i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1803                config ? config->i2c_addr : 0);
1804
1805         state = kzalloc(sizeof(struct lgdt3306a_state), GFP_KERNEL);
1806         if (state == NULL)
1807                 goto fail;
1808
1809         state->cfg = config;
1810         state->i2c_adap = i2c_adap;
1811
1812         memcpy(&state->frontend.ops, &lgdt3306a_ops,
1813                sizeof(struct dvb_frontend_ops));
1814         state->frontend.demodulator_priv = state;
1815
1816         /* verify that we're talking to a lg3306a */
1817         /* FGR - NOTE - there is no obvious ChipId to check; we check
1818          * some "known" bits after reset, but it's still just a guess */
1819         ret = lgdt3306a_read_reg(state, 0x0000, &val);
1820         if (lg_chkerr(ret))
1821                 goto fail;
1822         if ((val & 0x74) != 0x74) {
1823                 pr_warn("expected 0x74, got 0x%x\n", (val & 0x74));
1824 #if 0
1825                 /* FIXME - re-enable when we know this is right */
1826                 goto fail;
1827 #endif
1828         }
1829         ret = lgdt3306a_read_reg(state, 0x0001, &val);
1830         if (lg_chkerr(ret))
1831                 goto fail;
1832         if ((val & 0xf6) != 0xc6) {
1833                 pr_warn("expected 0xc6, got 0x%x\n", (val & 0xf6));
1834 #if 0
1835                 /* FIXME - re-enable when we know this is right */
1836                 goto fail;
1837 #endif
1838         }
1839         ret = lgdt3306a_read_reg(state, 0x0002, &val);
1840         if (lg_chkerr(ret))
1841                 goto fail;
1842         if ((val & 0x73) != 0x03) {
1843                 pr_warn("expected 0x03, got 0x%x\n", (val & 0x73));
1844 #if 0
1845                 /* FIXME - re-enable when we know this is right */
1846                 goto fail;
1847 #endif
1848         }
1849
1850         state->current_frequency = -1;
1851         state->current_modulation = -1;
1852
1853         lgdt3306a_sleep(state);
1854
1855         return &state->frontend;
1856
1857 fail:
1858         pr_warn("unable to detect LGDT3306A hardware\n");
1859         kfree(state);
1860         return NULL;
1861 }
1862 EXPORT_SYMBOL(lgdt3306a_attach);
1863
1864 #ifdef DBG_DUMP
1865
1866 static const short regtab[] = {
1867         0x0000, /* SOFTRSTB 1'b1 1'b1 1'b1 ADCPDB 1'b1 PLLPDB GBBPDB 11111111 */
1868         0x0001, /* 1'b1 1'b1 1'b0 1'b0 AUTORPTRS */
1869         0x0002, /* NI2CRPTEN 1'b0 1'b0 1'b0 SPECINVAUT */
1870         0x0003, /* AGCRFOUT */
1871         0x0004, /* ADCSEL1V ADCCNT ADCCNF ADCCNS ADCCLKPLL */
1872         0x0005, /* PLLINDIVSE */
1873         0x0006, /* PLLCTRL[7:0] 11100001 */
1874         0x0007, /* SYSINITWAITTIME[7:0] (msec) 00001000 */
1875         0x0008, /* STDOPMODE[7:0] 10000000 */
1876         0x0009, /* 1'b0 1'b0 1'b0 STDOPDETTMODE[2:0] STDOPDETCMODE[1:0] 00011110 */
1877         0x000a, /* DAFTEN 1'b1 x x SCSYSLOCK */
1878         0x000b, /* SCSYSLOCKCHKTIME[7:0] (10msec) 01100100 */
1879         0x000d, /* x SAMPLING4 */
1880         0x000e, /* SAMFREQ[15:8] 00000000 */
1881         0x000f, /* SAMFREQ[7:0] 00000000 */
1882         0x0010, /* IFFREQ[15:8] 01100000 */
1883         0x0011, /* IFFREQ[7:0] 00000000 */
1884         0x0012, /* AGCEN AGCREFMO */
1885         0x0013, /* AGCRFFIXB AGCIFFIXB AGCLOCKDETRNGSEL[1:0] 1'b1 1'b0 1'b0 1'b0 11101000 */
1886         0x0014, /* AGCFIXVALUE[7:0] 01111111 */
1887         0x0015, /* AGCREF[15:8] 00001010 */
1888         0x0016, /* AGCREF[7:0] 11100100 */
1889         0x0017, /* AGCDELAY[7:0] 00100000 */
1890         0x0018, /* AGCRFBW[3:0] AGCIFBW[3:0] 10001000 */
1891         0x0019, /* AGCUDOUTMODE[1:0] AGCUDCTRLLEN[1:0] AGCUDCTRL */
1892         0x001c, /* 1'b1 PFEN MFEN AICCVSYNC */
1893         0x001d, /* 1'b0 1'b1 1'b0 1'b1 AICCVSYNC */
1894         0x001e, /* AICCALPHA[3:0] 1'b1 1'b0 1'b1 1'b0 01111010 */
1895         0x001f, /* AICCDETTH[19:16] AICCOFFTH[19:16] 00000000 */
1896         0x0020, /* AICCDETTH[15:8] 01111100 */
1897         0x0021, /* AICCDETTH[7:0] 00000000 */
1898         0x0022, /* AICCOFFTH[15:8] 00000101 */
1899         0x0023, /* AICCOFFTH[7:0] 11100000 */
1900         0x0024, /* AICCOPMODE3[1:0] AICCOPMODE2[1:0] AICCOPMODE1[1:0] AICCOPMODE0[1:0] 00000000 */
1901         0x0025, /* AICCFIXFREQ3[23:16] 00000000 */
1902         0x0026, /* AICCFIXFREQ3[15:8] 00000000 */
1903         0x0027, /* AICCFIXFREQ3[7:0] 00000000 */
1904         0x0028, /* AICCFIXFREQ2[23:16] 00000000 */
1905         0x0029, /* AICCFIXFREQ2[15:8] 00000000 */
1906         0x002a, /* AICCFIXFREQ2[7:0] 00000000 */
1907         0x002b, /* AICCFIXFREQ1[23:16] 00000000 */
1908         0x002c, /* AICCFIXFREQ1[15:8] 00000000 */
1909         0x002d, /* AICCFIXFREQ1[7:0] 00000000 */
1910         0x002e, /* AICCFIXFREQ0[23:16] 00000000 */
1911         0x002f, /* AICCFIXFREQ0[15:8] 00000000 */
1912         0x0030, /* AICCFIXFREQ0[7:0] 00000000 */
1913         0x0031, /* 1'b0 1'b1 1'b0 1'b0 x DAGC1STER */
1914         0x0032, /* DAGC1STEN DAGC1STER */
1915         0x0033, /* DAGC1STREF[15:8] 00001010 */
1916         0x0034, /* DAGC1STREF[7:0] 11100100 */
1917         0x0035, /* DAGC2NDE */
1918         0x0036, /* DAGC2NDREF[15:8] 00001010 */
1919         0x0037, /* DAGC2NDREF[7:0] 10000000 */
1920         0x0038, /* DAGC2NDLOCKDETRNGSEL[1:0] */
1921         0x003d, /* 1'b1 SAMGEARS */
1922         0x0040, /* SAMLFGMA */
1923         0x0041, /* SAMLFBWM */
1924         0x0044, /* 1'b1 CRGEARSHE */
1925         0x0045, /* CRLFGMAN */
1926         0x0046, /* CFLFBWMA */
1927         0x0047, /* CRLFGMAN */
1928         0x0048, /* x x x x CRLFGSTEP_VS[3:0] xxxx1001 */
1929         0x0049, /* CRLFBWMA */
1930         0x004a, /* CRLFBWMA */
1931         0x0050, /* 1'b0 1'b1 1'b1 1'b0 MSECALCDA */
1932         0x0070, /* TPOUTEN TPIFEN TPCLKOUTE */
1933         0x0071, /* TPSENB TPSSOPBITE */
1934         0x0073, /* TP47HINS x x CHBERINT PERMODE[1:0] PERINT[1:0] 1xx11100 */
1935         0x0075, /* x x x x x IQSWAPCTRL[2:0] xxxxx000 */
1936         0x0076, /* NBERCON NBERST NBERPOL NBERWSYN */
1937         0x0077, /* x NBERLOSTTH[2:0] NBERACQTH[3:0] x0000000 */
1938         0x0078, /* NBERPOLY[31:24] 00000000 */
1939         0x0079, /* NBERPOLY[23:16] 00000000 */
1940         0x007a, /* NBERPOLY[15:8] 00000000 */
1941         0x007b, /* NBERPOLY[7:0] 00000000 */
1942         0x007c, /* NBERPED[31:24] 00000000 */
1943         0x007d, /* NBERPED[23:16] 00000000 */
1944         0x007e, /* NBERPED[15:8] 00000000 */
1945         0x007f, /* NBERPED[7:0] 00000000 */
1946         0x0080, /* x AGCLOCK DAGCLOCK SYSLOCK x x NEVERLOCK[1:0] */
1947         0x0085, /* SPECINVST */
1948         0x0088, /* SYSLOCKTIME[15:8] */
1949         0x0089, /* SYSLOCKTIME[7:0] */
1950         0x008c, /* FECLOCKTIME[15:8] */
1951         0x008d, /* FECLOCKTIME[7:0] */
1952         0x008e, /* AGCACCOUT[15:8] */
1953         0x008f, /* AGCACCOUT[7:0] */
1954         0x0090, /* AICCREJSTATUS[3:0] AICCREJBUSY[3:0] */
1955         0x0091, /* AICCVSYNC */
1956         0x009c, /* CARRFREQOFFSET[15:8] */
1957         0x009d, /* CARRFREQOFFSET[7:0] */
1958         0x00a1, /* SAMFREQOFFSET[23:16] */
1959         0x00a2, /* SAMFREQOFFSET[15:8] */
1960         0x00a3, /* SAMFREQOFFSET[7:0] */
1961         0x00a6, /* SYNCLOCK SYNCLOCKH */
1962 #if 0 /* covered elsewhere */
1963         0x00e8, /* CONSTPWR[15:8] */
1964         0x00e9, /* CONSTPWR[7:0] */
1965         0x00ea, /* BMSE[15:8] */
1966         0x00eb, /* BMSE[7:0] */
1967         0x00ec, /* MSE[15:8] */
1968         0x00ed, /* MSE[7:0] */
1969         0x00ee, /* CONSTI[7:0] */
1970         0x00ef, /* CONSTQ[7:0] */
1971 #endif
1972         0x00f4, /* TPIFTPERRCNT[7:0] */
1973         0x00f5, /* TPCORREC */
1974         0x00f6, /* VBBER[15:8] */
1975         0x00f7, /* VBBER[7:0] */
1976         0x00f8, /* VABER[15:8] */
1977         0x00f9, /* VABER[7:0] */
1978         0x00fa, /* TPERRCNT[7:0] */
1979         0x00fb, /* NBERLOCK x x x x x x x */
1980         0x00fc, /* NBERVALUE[31:24] */
1981         0x00fd, /* NBERVALUE[23:16] */
1982         0x00fe, /* NBERVALUE[15:8] */
1983         0x00ff, /* NBERVALUE[7:0] */
1984         0x1000, /* 1'b0 WODAGCOU */
1985         0x1005, /* x x 1'b1 1'b1 x SRD_Q_QM */
1986         0x1009, /* SRDWAITTIME[7:0] (10msec) 00100011 */
1987         0x100a, /* SRDWAITTIME_CQS[7:0] (msec) 01100100 */
1988         0x101a, /* x 1'b1 1'b0 1'b0 x QMDQAMMODE[2:0] x100x010 */
1989         0x1036, /* 1'b0 1'b1 1'b0 1'b0 SAMGSEND_CQS[3:0] 01001110 */
1990         0x103c, /* SAMGSAUTOSTL_V[3:0] SAMGSAUTOEDL_V[3:0] 01000110 */
1991         0x103d, /* 1'b1 1'b1 SAMCNORMBP_V[1:0] 1'b0 1'b0 SAMMODESEL_V[1:0] 11100001 */
1992         0x103f, /* SAMZTEDSE */
1993         0x105d, /* EQSTATUSE */
1994         0x105f, /* x PMAPG2_V[2:0] x DMAPG2_V[2:0] x001x011 */
1995         0x1060, /* 1'b1 EQSTATUSE */
1996         0x1061, /* CRMAPBWSTL_V[3:0] CRMAPBWEDL_V[3:0] 00000100 */
1997         0x1065, /* 1'b0 x CRMODE_V[1:0] 1'b1 x 1'b1 x 0x111x1x */
1998         0x1066, /* 1'b0 1'b0 1'b1 1'b0 1'b1 PNBOOSTSE */
1999         0x1068, /* CREPHNGAIN2_V[3:0] CREPHNPBW_V[3:0] 10010001 */
2000         0x106e, /* x x x x x CREPHNEN_ */
2001         0x106f, /* CREPHNTH_V[7:0] 00010101 */
2002         0x1072, /* CRSWEEPN */
2003         0x1073, /* CRPGAIN_V[3:0] x x 1'b1 1'b1 1001xx11 */
2004         0x1074, /* CRPBW_V[3:0] x x 1'b1 1'b1 0001xx11 */
2005         0x1080, /* DAFTSTATUS[1:0] x x x x x x */
2006         0x1081, /* SRDSTATUS[1:0] x x x x x SRDLOCK */
2007         0x10a9, /* EQSTATUS_CQS[1:0] x x x x x x */
2008         0x10b7, /* EQSTATUS_V[1:0] x x x x x x */
2009 #if 0 /* SMART_ANT */
2010         0x1f00, /* MODEDETE */
2011         0x1f01, /* x x x x x x x SFNRST xxxxxxx0 */
2012         0x1f03, /* NUMOFANT[7:0] 10000000 */
2013         0x1f04, /* x SELMASK[6:0] x0000000 */
2014         0x1f05, /* x SETMASK[6:0] x0000000 */
2015         0x1f06, /* x TXDATA[6:0] x0000000 */
2016         0x1f07, /* x CHNUMBER[6:0] x0000000 */
2017         0x1f09, /* AGCTIME[23:16] 10011000 */
2018         0x1f0a, /* AGCTIME[15:8] 10010110 */
2019         0x1f0b, /* AGCTIME[7:0] 10000000 */
2020         0x1f0c, /* ANTTIME[31:24] 00000000 */
2021         0x1f0d, /* ANTTIME[23:16] 00000011 */
2022         0x1f0e, /* ANTTIME[15:8] 10010000 */
2023         0x1f0f, /* ANTTIME[7:0] 10010000 */
2024         0x1f11, /* SYNCTIME[23:16] 10011000 */
2025         0x1f12, /* SYNCTIME[15:8] 10010110 */
2026         0x1f13, /* SYNCTIME[7:0] 10000000 */
2027         0x1f14, /* SNRTIME[31:24] 00000001 */
2028         0x1f15, /* SNRTIME[23:16] 01111101 */
2029         0x1f16, /* SNRTIME[15:8] 01111000 */
2030         0x1f17, /* SNRTIME[7:0] 01000000 */
2031         0x1f19, /* FECTIME[23:16] 00000000 */
2032         0x1f1a, /* FECTIME[15:8] 01110010 */
2033         0x1f1b, /* FECTIME[7:0] 01110000 */
2034         0x1f1d, /* FECTHD[7:0] 00000011 */
2035         0x1f1f, /* SNRTHD[23:16] 00001000 */
2036         0x1f20, /* SNRTHD[15:8] 01111111 */
2037         0x1f21, /* SNRTHD[7:0] 10000101 */
2038         0x1f80, /* IRQFLG x x SFSDRFLG MODEBFLG SAVEFLG SCANFLG TRACKFLG */
2039         0x1f81, /* x SYNCCON SNRCON FECCON x STDBUSY SYNCRST AGCFZCO */
2040         0x1f82, /* x x x SCANOPCD[4:0] */
2041         0x1f83, /* x x x x MAINOPCD[3:0] */
2042         0x1f84, /* x x RXDATA[13:8] */
2043         0x1f85, /* RXDATA[7:0] */
2044         0x1f86, /* x x SDTDATA[13:8] */
2045         0x1f87, /* SDTDATA[7:0] */
2046         0x1f89, /* ANTSNR[23:16] */
2047         0x1f8a, /* ANTSNR[15:8] */
2048         0x1f8b, /* ANTSNR[7:0] */
2049         0x1f8c, /* x x x x ANTFEC[13:8] */
2050         0x1f8d, /* ANTFEC[7:0] */
2051         0x1f8e, /* MAXCNT[7:0] */
2052         0x1f8f, /* SCANCNT[7:0] */
2053         0x1f91, /* MAXPW[23:16] */
2054         0x1f92, /* MAXPW[15:8] */
2055         0x1f93, /* MAXPW[7:0] */
2056         0x1f95, /* CURPWMSE[23:16] */
2057         0x1f96, /* CURPWMSE[15:8] */
2058         0x1f97, /* CURPWMSE[7:0] */
2059 #endif /* SMART_ANT */
2060         0x211f, /* 1'b1 1'b1 1'b1 CIRQEN x x 1'b0 1'b0 1111xx00 */
2061         0x212a, /* EQAUTOST */
2062         0x2122, /* CHFAST[7:0] 01100000 */
2063         0x212b, /* FFFSTEP_V[3:0] x FBFSTEP_V[2:0] 0001x001 */
2064         0x212c, /* PHDEROTBWSEL[3:0] 1'b1 1'b1 1'b1 1'b0 10001110 */
2065         0x212d, /* 1'b1 1'b1 1'b1 1'b1 x x TPIFLOCKS */
2066         0x2135, /* DYNTRACKFDEQ[3:0] x 1'b0 1'b0 1'b0 1010x000 */
2067         0x2141, /* TRMODE[1:0] 1'b1 1'b1 1'b0 1'b1 1'b1 1'b1 01110111 */
2068         0x2162, /* AICCCTRLE */
2069         0x2173, /* PHNCNFCNT[7:0] 00000100 */
2070         0x2179, /* 1'b0 1'b0 1'b0 1'b1 x BADSINGLEDYNTRACKFBF[2:0] 0001x001 */
2071         0x217a, /* 1'b0 1'b0 1'b0 1'b1 x BADSLOWSINGLEDYNTRACKFBF[2:0] 0001x001 */
2072         0x217e, /* CNFCNTTPIF[7:0] 00001000 */
2073         0x217f, /* TPERRCNTTPIF[7:0] 00000001 */
2074         0x2180, /* x x x x x x FBDLYCIR[9:8] */
2075         0x2181, /* FBDLYCIR[7:0] */
2076         0x2185, /* MAXPWRMAIN[7:0] */
2077         0x2191, /* NCOMBDET x x x x x x x */
2078         0x2199, /* x MAINSTRON */
2079         0x219a, /* FFFEQSTEPOUT_V[3:0] FBFSTEPOUT_V[2:0] */
2080         0x21a1, /* x x SNRREF[5:0] */
2081         0x2845, /* 1'b0 1'b1 x x FFFSTEP_CQS[1:0] FFFCENTERTAP[1:0] 01xx1110 */
2082         0x2846, /* 1'b0 x 1'b0 1'b1 FBFSTEP_CQS[1:0] 1'b1 1'b0 0x011110 */
2083         0x2847, /* ENNOSIGDE */
2084         0x2849, /* 1'b1 1'b1 NOUSENOSI */
2085         0x284a, /* EQINITWAITTIME[7:0] 01100100 */
2086         0x3000, /* 1'b1 1'b1 1'b1 x x x 1'b0 RPTRSTM */
2087         0x3001, /* RPTRSTWAITTIME[7:0] (100msec) 00110010 */
2088         0x3031, /* FRAMELOC */
2089         0x3032, /* 1'b1 1'b0 1'b0 1'b0 x x FRAMELOCKMODE_CQS[1:0] 1000xx11 */
2090         0x30a9, /* VDLOCK_Q FRAMELOCK */
2091         0x30aa, /* MPEGLOCK */
2092 };
2093
2094 #define numDumpRegs (ARRAY_SIZE(regtab))
2095 static u8 regval1[numDumpRegs] = {0, };
2096 static u8 regval2[numDumpRegs] = {0, };
2097
2098 static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state)
2099 {
2100                 memset(regval2, 0xff, sizeof(regval2));
2101                 lgdt3306a_DumpRegs(state);
2102 }
2103
2104 static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state)
2105 {
2106         int i;
2107         int sav_debug = debug;
2108
2109         if ((debug & DBG_DUMP) == 0)
2110                 return;
2111         debug &= ~DBG_REG; /* suppress DBG_REG during reg dump */
2112
2113         lg_debug("\n");
2114
2115         for (i = 0; i < numDumpRegs; i++) {
2116                 lgdt3306a_read_reg(state, regtab[i], &regval1[i]);
2117                 if (regval1[i] != regval2[i]) {
2118                         lg_debug(" %04X = %02X\n", regtab[i], regval1[i]);
2119                         regval2[i] = regval1[i];
2120                 }
2121         }
2122         debug = sav_debug;
2123 }
2124 #endif /* DBG_DUMP */
2125
2126
2127
2128 static const struct dvb_frontend_ops lgdt3306a_ops = {
2129         .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
2130         .info = {
2131                 .name = "LG Electronics LGDT3306A VSB/QAM Frontend",
2132                 .frequency_min_hz      =  54 * MHz,
2133                 .frequency_max_hz      = 858 * MHz,
2134                 .frequency_stepsize_hz = 62500,
2135                 .caps = FE_CAN_QAM_AUTO | FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
2136         },
2137         .i2c_gate_ctrl        = lgdt3306a_i2c_gate_ctrl,
2138         .init                 = lgdt3306a_init,
2139         .sleep                = lgdt3306a_fe_sleep,
2140         /* if this is set, it overrides the default swzigzag */
2141         .tune                 = lgdt3306a_tune,
2142         .set_frontend         = lgdt3306a_set_parameters,
2143         .get_frontend         = lgdt3306a_get_frontend,
2144         .get_frontend_algo    = lgdt3306a_get_frontend_algo,
2145         .get_tune_settings    = lgdt3306a_get_tune_settings,
2146         .read_status          = lgdt3306a_read_status,
2147         .read_ber             = lgdt3306a_read_ber,
2148         .read_signal_strength = lgdt3306a_read_signal_strength,
2149         .read_snr             = lgdt3306a_read_snr,
2150         .read_ucblocks        = lgdt3306a_read_ucblocks,
2151         .release              = lgdt3306a_release,
2152         .ts_bus_ctrl          = lgdt3306a_ts_bus_ctrl,
2153         .search               = lgdt3306a_search,
2154 };
2155
2156 static int lgdt3306a_select(struct i2c_mux_core *muxc, u32 chan)
2157 {
2158         struct i2c_client *client = i2c_mux_priv(muxc);
2159         struct lgdt3306a_state *state = i2c_get_clientdata(client);
2160
2161         return lgdt3306a_i2c_gate_ctrl(&state->frontend, 1);
2162 }
2163
2164 static int lgdt3306a_deselect(struct i2c_mux_core *muxc, u32 chan)
2165 {
2166         struct i2c_client *client = i2c_mux_priv(muxc);
2167         struct lgdt3306a_state *state = i2c_get_clientdata(client);
2168
2169         return lgdt3306a_i2c_gate_ctrl(&state->frontend, 0);
2170 }
2171
2172 static int lgdt3306a_probe(struct i2c_client *client)
2173 {
2174         struct lgdt3306a_config *config;
2175         struct lgdt3306a_state *state;
2176         struct dvb_frontend *fe;
2177         int ret;
2178
2179         config = kmemdup(client->dev.platform_data,
2180                          sizeof(struct lgdt3306a_config), GFP_KERNEL);
2181         if (config == NULL) {
2182                 ret = -ENOMEM;
2183                 goto fail;
2184         }
2185
2186         config->i2c_addr = client->addr;
2187         fe = lgdt3306a_attach(config, client->adapter);
2188         if (fe == NULL) {
2189                 ret = -ENODEV;
2190                 goto err_fe;
2191         }
2192
2193         i2c_set_clientdata(client, fe->demodulator_priv);
2194         state = fe->demodulator_priv;
2195         state->frontend.ops.release = NULL;
2196
2197         /* create mux i2c adapter for tuner */
2198         state->muxc = i2c_mux_alloc(client->adapter, &client->dev,
2199                                   1, 0, I2C_MUX_LOCKED,
2200                                   lgdt3306a_select, lgdt3306a_deselect);
2201         if (!state->muxc) {
2202                 ret = -ENOMEM;
2203                 goto err_kfree;
2204         }
2205         state->muxc->priv = client;
2206         ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
2207         if (ret)
2208                 goto err_kfree;
2209
2210         /* create dvb_frontend */
2211         fe->ops.i2c_gate_ctrl = NULL;
2212         *config->i2c_adapter = state->muxc->adapter[0];
2213         *config->fe = fe;
2214
2215         dev_info(&client->dev, "LG Electronics LGDT3306A successfully identified\n");
2216
2217         return 0;
2218
2219 err_kfree:
2220         kfree(state);
2221 err_fe:
2222         kfree(config);
2223 fail:
2224         dev_warn(&client->dev, "probe failed = %d\n", ret);
2225         return ret;
2226 }
2227
2228 static void lgdt3306a_remove(struct i2c_client *client)
2229 {
2230         struct lgdt3306a_state *state = i2c_get_clientdata(client);
2231
2232         i2c_mux_del_adapters(state->muxc);
2233
2234         state->frontend.ops.release = NULL;
2235         state->frontend.demodulator_priv = NULL;
2236
2237         kfree(state->cfg);
2238         kfree(state);
2239 }
2240
2241 static const struct i2c_device_id lgdt3306a_id_table[] = {
2242         {"lgdt3306a", 0},
2243         {}
2244 };
2245 MODULE_DEVICE_TABLE(i2c, lgdt3306a_id_table);
2246
2247 static struct i2c_driver lgdt3306a_driver = {
2248         .driver = {
2249                 .name                = "lgdt3306a",
2250                 .suppress_bind_attrs = true,
2251         },
2252         .probe          = lgdt3306a_probe,
2253         .remove         = lgdt3306a_remove,
2254         .id_table       = lgdt3306a_id_table,
2255 };
2256
2257 module_i2c_driver(lgdt3306a_driver);
2258
2259 MODULE_DESCRIPTION("LG Electronics LGDT3306A ATSC/QAM-B Demodulator Driver");
2260 MODULE_AUTHOR("Fred Richter <frichter@hauppauge.com>");
2261 MODULE_LICENSE("GPL");
2262 MODULE_VERSION("0.2");