drivers/media/dvb-frontends/lg2160.c

   1 /*
   2  *    Support for LG2160 - ATSC/MH
   3  *
   4  *    Copyright (C) 2010 Michael Krufky <[email protected]>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  *    You should have received a copy of the GNU General Public License
  17  *    along with this program; if not, write to the Free Software
  18  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  *
  20  */
  21
  22 #include <linux/jiffies.h>
  23 #include <linux/dvb/frontend.h>
  24 #include "lg2160.h"
  25
  26 static int debug;
  27 module_param(debug, int, 0644);
  28 MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
  29
  30 #define DBG_INFO 1
  31 #define DBG_REG  2
  32
  33 #define lg_printk(kern, fmt, arg...)                                    \
  34         printk(kern "%s: " fmt, __func__, ##arg)
  35
  36 #define lg_info(fmt, arg...)    printk(KERN_INFO "lg2160: " fmt, ##arg)
  37 #define lg_warn(fmt, arg...)    lg_printk(KERN_WARNING,       fmt, ##arg)
  38 #define lg_err(fmt, arg...)     lg_printk(KERN_ERR,           fmt, ##arg)
  39 #define lg_dbg(fmt, arg...) if (debug & DBG_INFO)                       \
  40                                 lg_printk(KERN_DEBUG,         fmt, ##arg)
  41 #define lg_reg(fmt, arg...) if (debug & DBG_REG)                        \
  42                                 lg_printk(KERN_DEBUG,         fmt, ##arg)
  43
  44 #define lg_fail(ret)                                                    \
  45 ({                                                                      \
  46         int __ret;                                                      \
  47         __ret = (ret < 0);                                              \
  48         if (__ret)                                                      \
  49                 lg_err("error %d on line %d\n", ret, __LINE__);         \
  50         __ret;                                                          \
  51 })
  52
  53 struct lg216x_state {
  54         struct i2c_adapter *i2c_adap;
  55         const struct lg2160_config *cfg;
  56
  57         struct dvb_frontend frontend;
  58
  59         u32 current_frequency;
  60         u8 parade_id;
  61         u8 fic_ver;
  62         unsigned int last_reset;
  63 };
  64
  65 /* ------------------------------------------------------------------------ */
  66
  67 static int lg216x_write_reg(struct lg216x_state *state, u16 reg, u8 val)
  68 {
  69         int ret;
  70         u8 buf[] = { reg >> 8, reg & 0xff, val };
  71         struct i2c_msg msg = {
  72                 .addr = state->cfg->i2c_addr, .flags = 0,
  73                 .buf = buf, .len = 3,
  74         };
  75
  76         lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
  77
  78         ret = i2c_transfer(state->i2c_adap, &msg, 1);
  79
  80         if (ret != 1) {
  81                 lg_err("error (addr %02x %02x <- %02x, err = %i)\n",
  82                        msg.buf[0], msg.buf[1], msg.buf[2], ret);
  83                 if (ret < 0)
  84                         return ret;
  85                 else
  86                         return -EREMOTEIO;
  87         }
  88         return 0;
  89 }
  90
  91 static int lg216x_read_reg(struct lg216x_state *state, u16 reg, u8 *val)
  92 {
  93         int ret;
  94         u8 reg_buf[] = { reg >> 8, reg & 0xff };
  95         struct i2c_msg msg[] = {
  96                 { .addr = state->cfg->i2c_addr,
  97                   .flags = 0, .buf = reg_buf, .len = 2 },
  98                 { .addr = state->cfg->i2c_addr,
  99                   .flags = I2C_M_RD, .buf = val, .len = 1 },
 100         };
 101
 102         lg_reg("reg: 0x%04x\n", reg);
 103
 104         ret = i2c_transfer(state->i2c_adap, msg, 2);
 105
 106         if (ret != 2) {
 107                 lg_err("error (addr %02x reg %04x error (ret == %i)\n",
 108                        state->cfg->i2c_addr, reg, ret);
 109                 if (ret < 0)
 110                         return ret;
 111                 else
 112                         return -EREMOTEIO;
 113         }
 114         return 0;
 115 }
 116
 117 struct lg216x_reg {
 118         u16 reg;
 119         u8 val;
 120 };
 121
 122 static int lg216x_write_regs(struct lg216x_state *state,
 123                              struct lg216x_reg *regs, int len)
 124 {
 125         int i, ret;
 126
 127         lg_reg("writing %d registers...\n", len);
 128
 129         for (i = 0; i < len; i++) {
 130                 ret = lg216x_write_reg(state, regs[i].reg, regs[i].val);
 131                 if (lg_fail(ret))
 132                         return ret;
 133         }
 134         return 0;
 135 }
 136
 137 static int lg216x_set_reg_bit(struct lg216x_state *state,
 138                               u16 reg, int bit, int onoff)
 139 {
 140         u8 val;
 141         int ret;
 142
 143         lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
 144
 145         ret = lg216x_read_reg(state, reg, &val);
 146         if (lg_fail(ret))
 147                 goto fail;
 148
 149         val &= ~(1 << bit);
 150         val |= (onoff & 1) << bit;
 151
 152         ret = lg216x_write_reg(state, reg, val);
 153         lg_fail(ret);
 154 fail:
 155         return ret;
 156 }
 157
 158 /* ------------------------------------------------------------------------ */
 159
 160 static int lg216x_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 161 {
 162         struct lg216x_state *state = fe->demodulator_priv;
 163         int ret;
 164
 165         if (state->cfg->deny_i2c_rptr)
 166                 return 0;
 167
 168         lg_dbg("(%d)\n", enable);
 169
 170         ret = lg216x_set_reg_bit(state, 0x0000, 0, enable ? 0 : 1);
 171
 172         msleep(1);
 173
 174         return ret;
 175 }
 176
 177 static int lg216x_soft_reset(struct lg216x_state *state)
 178 {
 179         int ret;
 180
 181         lg_dbg("\n");
 182
 183         ret = lg216x_write_reg(state, 0x0002, 0x00);
 184         if (lg_fail(ret))
 185                 goto fail;
 186
 187         msleep(20);
 188         ret = lg216x_write_reg(state, 0x0002, 0x01);
 189         if (lg_fail(ret))
 190                 goto fail;
 191
 192         state->last_reset = jiffies_to_msecs(jiffies);
 193 fail:
 194         return ret;
 195 }
 196
 197 static int lg216x_initialize(struct lg216x_state *state)
 198 {
 199         int ret;
 200
 201         static struct lg216x_reg lg2160_init[] = {
 202 #if 0
 203                 { .reg = 0x0015, .val = 0xe6 },
 204 #else
 205                 { .reg = 0x0015, .val = 0xf7 },
 206                 { .reg = 0x001b, .val = 0x52 },
 207                 { .reg = 0x0208, .val = 0x00 },
 208                 { .reg = 0x0209, .val = 0x82 },
 209                 { .reg = 0x0210, .val = 0xf9 },
 210                 { .reg = 0x020a, .val = 0x00 },
 211                 { .reg = 0x020b, .val = 0x82 },
 212                 { .reg = 0x020d, .val = 0x28 },
 213                 { .reg = 0x020f, .val = 0x14 },
 214 #endif
 215         };
 216
 217         static struct lg216x_reg lg2161_init[] = {
 218                 { .reg = 0x0000, .val = 0x41 },
 219                 { .reg = 0x0001, .val = 0xfb },
 220                 { .reg = 0x0216, .val = 0x00 },
 221                 { .reg = 0x0219, .val = 0x00 },
 222                 { .reg = 0x021b, .val = 0x55 },
 223                 { .reg = 0x0606, .val = 0x0a },
 224         };
 225
 226         switch (state->cfg->lg_chip) {
 227         case LG2160:
 228                 ret = lg216x_write_regs(state,
 229                                         lg2160_init, ARRAY_SIZE(lg2160_init));
 230                 break;
 231         case LG2161:
 232                 ret = lg216x_write_regs(state,
 233                                         lg2161_init, ARRAY_SIZE(lg2161_init));
 234                 break;
 235         default:
 236                 ret = -EINVAL;
 237                 break;
 238         }
 239         if (lg_fail(ret))
 240                 goto fail;
 241
 242         ret = lg216x_soft_reset(state);
 243         lg_fail(ret);
 244 fail:
 245         return ret;
 246 }
 247
 248 /* ------------------------------------------------------------------------ */
 249
 250 static int lg216x_set_if(struct lg216x_state *state)
 251 {
 252         u8 val;
 253         int ret;
 254
 255         lg_dbg("%d KHz\n", state->cfg->if_khz);
 256
 257         ret = lg216x_read_reg(state, 0x0132, &val);
 258         if (lg_fail(ret))
 259                 goto fail;
 260
 261         val &= 0xfb;
 262         val |= (0 == state->cfg->if_khz) ? 0x04 : 0x00;
 263
 264         ret = lg216x_write_reg(state, 0x0132, val);
 265         lg_fail(ret);
 266
 267         /* if NOT zero IF, 6 MHz is the default */
 268 fail:
 269         return ret;
 270 }
 271
 272 /* ------------------------------------------------------------------------ */
 273
 274 static int lg2160_agc_fix(struct lg216x_state *state,
 275                           int if_agc_fix, int rf_agc_fix)
 276 {
 277         u8 val;
 278         int ret;
 279
 280         ret = lg216x_read_reg(state, 0x0100, &val);
 281         if (lg_fail(ret))
 282                 goto fail;
 283
 284         val &= 0xf3;
 285         val |= (if_agc_fix) ? 0x08 : 0x00;
 286         val |= (rf_agc_fix) ? 0x04 : 0x00;
 287
 288         ret = lg216x_write_reg(state, 0x0100, val);
 289         lg_fail(ret);
 290 fail:
 291         return ret;
 292 }
 293
 294 #if 0
 295 static int lg2160_agc_freeze(struct lg216x_state *state,
 296                              int if_agc_freeze, int rf_agc_freeze)
 297 {
 298         u8 val;
 299         int ret;
 300
 301         ret = lg216x_read_reg(state, 0x0100, &val);
 302         if (lg_fail(ret))
 303                 goto fail;
 304
 305         val &= 0xcf;
 306         val |= (if_agc_freeze) ? 0x20 : 0x00;
 307         val |= (rf_agc_freeze) ? 0x10 : 0x00;
 308
 309         ret = lg216x_write_reg(state, 0x0100, val);
 310         lg_fail(ret);
 311 fail:
 312         return ret;
 313 }
 314 #endif
 315
 316 static int lg2160_agc_polarity(struct lg216x_state *state,
 317                                int if_agc_polarity, int rf_agc_polarity)
 318 {
 319         u8 val;
 320         int ret;
 321
 322         ret = lg216x_read_reg(state, 0x0100, &val);
 323         if (lg_fail(ret))
 324                 goto fail;
 325
 326         val &= 0xfc;
 327         val |= (if_agc_polarity) ? 0x02 : 0x00;
 328         val |= (rf_agc_polarity) ? 0x01 : 0x00;
 329
 330         ret = lg216x_write_reg(state, 0x0100, val);
 331         lg_fail(ret);
 332 fail:
 333         return ret;
 334 }
 335
 336 static int lg2160_tuner_pwr_save_polarity(struct lg216x_state *state,
 337                                           int polarity)
 338 {
 339         u8 val;
 340         int ret;
 341
 342         ret = lg216x_read_reg(state, 0x0008, &val);
 343         if (lg_fail(ret))
 344                 goto fail;
 345
 346         val &= 0xfe;
 347         val |= (polarity) ? 0x01 : 0x00;
 348
 349         ret = lg216x_write_reg(state, 0x0008, val);
 350         lg_fail(ret);
 351 fail:
 352         return ret;
 353 }
 354
 355 static int lg2160_spectrum_polarity(struct lg216x_state *state,
 356                                     int inverted)
 357 {
 358         u8 val;
 359         int ret;
 360
 361         ret = lg216x_read_reg(state, 0x0132, &val);
 362         if (lg_fail(ret))
 363                 goto fail;
 364
 365         val &= 0xfd;
 366         val |= (inverted) ? 0x02 : 0x00;
 367
 368         ret = lg216x_write_reg(state, 0x0132, val);
 369         lg_fail(ret);
 370 fail:
 371         return lg216x_soft_reset(state);
 372 }
 373
 374 static int lg2160_tuner_pwr_save(struct lg216x_state *state, int onoff)
 375 {
 376         u8 val;
 377         int ret;
 378
 379         ret = lg216x_read_reg(state, 0x0007, &val);
 380         if (lg_fail(ret))
 381                 goto fail;
 382
 383         val &= 0xbf;
 384         val |= (onoff) ? 0x40 : 0x00;
 385
 386         ret = lg216x_write_reg(state, 0x0007, val);
 387         lg_fail(ret);
 388 fail:
 389         return ret;
 390 }
 391
 392 static int lg216x_set_parade(struct lg216x_state *state, int id)
 393 {
 394         int ret;
 395
 396         ret = lg216x_write_reg(state, 0x013e, id & 0x7f);
 397         if (lg_fail(ret))
 398                 goto fail;
 399
 400         state->parade_id = id & 0x7f;
 401 fail:
 402         return ret;
 403 }
 404
 405 static int lg216x_set_ensemble(struct lg216x_state *state, int id)
 406 {
 407         int ret;
 408         u16 reg;
 409         u8 val;
 410
 411         switch (state->cfg->lg_chip) {
 412         case LG2160:
 413                 reg = 0x0400;
 414                 break;
 415         case LG2161:
 416         default:
 417                 reg = 0x0500;
 418                 break;
 419         }
 420
 421         ret = lg216x_read_reg(state, reg, &val);
 422         if (lg_fail(ret))
 423                 goto fail;
 424
 425         val &= 0xfe;
 426         val |= (id) ? 0x01 : 0x00;
 427
 428         ret = lg216x_write_reg(state, reg, val);
 429         lg_fail(ret);
 430 fail:
 431         return ret;
 432 }
 433
 434 static int lg2160_set_spi_clock(struct lg216x_state *state)
 435 {
 436         u8 val;
 437         int ret;
 438
 439         ret = lg216x_read_reg(state, 0x0014, &val);
 440         if (lg_fail(ret))
 441                 goto fail;
 442
 443         val &= 0xf3;
 444         val |= (state->cfg->spi_clock << 2);
 445
 446         ret = lg216x_write_reg(state, 0x0014, val);
 447         lg_fail(ret);
 448 fail:
 449         return ret;
 450 }
 451
 452 static int lg2161_set_output_interface(struct lg216x_state *state)
 453 {
 454         u8 val;
 455         int ret;
 456
 457         ret = lg216x_read_reg(state, 0x0014, &val);
 458         if (lg_fail(ret))
 459                 goto fail;
 460
 461         val &= ~0x07;
 462         val |= state->cfg->output_if; /* FIXME: needs sanity check */
 463
 464         ret = lg216x_write_reg(state, 0x0014, val);
 465         lg_fail(ret);
 466 fail:
 467         return ret;
 468 }
 469
 470 static int lg216x_enable_fic(struct lg216x_state *state, int onoff)
 471 {
 472         int ret;
 473
 474         ret = lg216x_write_reg(state, 0x0017, 0x23);
 475         if (lg_fail(ret))
 476                 goto fail;
 477
 478         ret = lg216x_write_reg(state, 0x0016, 0xfc);
 479         if (lg_fail(ret))
 480                 goto fail;
 481
 482         switch (state->cfg->lg_chip) {
 483         case LG2160:
 484                 ret = lg216x_write_reg(state, 0x0016,
 485                                        0xfc | ((onoff) ? 0x02 : 0x00));
 486                 break;
 487         case LG2161:
 488                 ret = lg216x_write_reg(state, 0x0016, (onoff) ? 0x10 : 0x00);
 489                 break;
 490         }
 491         if (lg_fail(ret))
 492                 goto fail;
 493
 494         ret = lg216x_initialize(state);
 495         if (lg_fail(ret))
 496                 goto fail;
 497
 498         if (onoff) {
 499                 ret = lg216x_write_reg(state, 0x0017, 0x03);
 500                 lg_fail(ret);
 501         }
 502 fail:
 503         return ret;
 504 }
 505
 506 /* ------------------------------------------------------------------------ */
 507
 508 static int lg216x_get_fic_version(struct lg216x_state *state, u8 *ficver)
 509 {
 510         u8 val;
 511         int ret;
 512
 513         *ficver = 0xff; /* invalid value */
 514
 515         ret = lg216x_read_reg(state, 0x0128, &val);
 516         if (lg_fail(ret))
 517                 goto fail;
 518
 519         *ficver = (val >> 3) & 0x1f;
 520 fail:
 521         return ret;
 522 }
 523
 524 #if 0
 525 static int lg2160_get_parade_id(struct lg216x_state *state, u8 *id)
 526 {
 527         u8 val;
 528         int ret;
 529
 530         *id = 0xff; /* invalid value */
 531
 532         ret = lg216x_read_reg(state, 0x0123, &val);
 533         if (lg_fail(ret))
 534                 goto fail;
 535
 536         *id = val & 0x7f;
 537 fail:
 538         return ret;
 539 }
 540 #endif
 541
 542 static int lg216x_get_nog(struct lg216x_state *state, u8 *nog)
 543 {
 544         u8 val;
 545         int ret;
 546
 547         *nog = 0xff; /* invalid value */
 548
 549         ret = lg216x_read_reg(state, 0x0124, &val);
 550         if (lg_fail(ret))
 551                 goto fail;
 552
 553         *nog = ((val >> 4) & 0x07) + 1;
 554 fail:
 555         return ret;
 556 }
 557
 558 static int lg216x_get_tnog(struct lg216x_state *state, u8 *tnog)
 559 {
 560         u8 val;
 561         int ret;
 562
 563         *tnog = 0xff; /* invalid value */
 564
 565         ret = lg216x_read_reg(state, 0x0125, &val);
 566         if (lg_fail(ret))
 567                 goto fail;
 568
 569         *tnog = val & 0x1f;
 570 fail:
 571         return ret;
 572 }
 573
 574 static int lg216x_get_sgn(struct lg216x_state *state, u8 *sgn)
 575 {
 576         u8 val;
 577         int ret;
 578
 579         *sgn = 0xff; /* invalid value */
 580
 581         ret = lg216x_read_reg(state, 0x0124, &val);
 582         if (lg_fail(ret))
 583                 goto fail;
 584
 585         *sgn = val & 0x0f;
 586 fail:
 587         return ret;
 588 }
 589
 590 static int lg216x_get_prc(struct lg216x_state *state, u8 *prc)
 591 {
 592         u8 val;
 593         int ret;
 594
 595         *prc = 0xff; /* invalid value */
 596
 597         ret = lg216x_read_reg(state, 0x0125, &val);
 598         if (lg_fail(ret))
 599                 goto fail;
 600
 601         *prc = ((val >> 5) & 0x07) + 1;
 602 fail:
 603         return ret;
 604 }
 605
 606 /* ------------------------------------------------------------------------ */
 607
 608 static int lg216x_get_rs_frame_mode(struct lg216x_state *state,
 609                                     enum atscmh_rs_frame_mode *rs_framemode)
 610 {
 611         u8 val;
 612         int ret;
 613
 614         switch (state->cfg->lg_chip) {
 615         case LG2160:
 616                 ret = lg216x_read_reg(state, 0x0410, &val);
 617                 break;
 618         case LG2161:
 619                 ret = lg216x_read_reg(state, 0x0513, &val);
 620                 break;
 621         default:
 622                 ret = -EINVAL;
 623         }
 624         if (lg_fail(ret))
 625                 goto fail;
 626
 627         switch ((val >> 4) & 0x03) {
 628 #if 1
 629         default:
 630 #endif
 631         case 0x00:
 632                 *rs_framemode = ATSCMH_RSFRAME_PRI_ONLY;
 633                 break;
 634         case 0x01:
 635                 *rs_framemode = ATSCMH_RSFRAME_PRI_SEC;
 636                 break;
 637 #if 0
 638         default:
 639                 *rs_framemode = ATSCMH_RSFRAME_RES;
 640                 break;
 641 #endif
 642         }
 643 fail:
 644         return ret;
 645 }
 646
 647 static
 648 int lg216x_get_rs_frame_ensemble(struct lg216x_state *state,
 649                                  enum atscmh_rs_frame_ensemble *rs_frame_ens)
 650 {
 651         u8 val;
 652         int ret;
 653
 654         switch (state->cfg->lg_chip) {
 655         case LG2160:
 656                 ret = lg216x_read_reg(state, 0x0400, &val);
 657                 break;
 658         case LG2161:
 659                 ret = lg216x_read_reg(state, 0x0500, &val);
 660                 break;
 661         default:
 662                 ret = -EINVAL;
 663         }
 664         if (lg_fail(ret))
 665                 goto fail;
 666
 667         val &= 0x01;
 668         *rs_frame_ens = (enum atscmh_rs_frame_ensemble) val;
 669 fail:
 670         return ret;
 671 }
 672
 673 static int lg216x_get_rs_code_mode(struct lg216x_state *state,
 674                                    enum atscmh_rs_code_mode *rs_code_pri,
 675                                    enum atscmh_rs_code_mode *rs_code_sec)
 676 {
 677         u8 val;
 678         int ret;
 679
 680         switch (state->cfg->lg_chip) {
 681         case LG2160:
 682                 ret = lg216x_read_reg(state, 0x0410, &val);
 683                 break;
 684         case LG2161:
 685                 ret = lg216x_read_reg(state, 0x0513, &val);
 686                 break;
 687         default:
 688                 ret = -EINVAL;
 689         }
 690         if (lg_fail(ret))
 691                 goto fail;
 692
 693         *rs_code_pri = (enum atscmh_rs_code_mode) ((val >> 2) & 0x03);
 694         *rs_code_sec = (enum atscmh_rs_code_mode) (val & 0x03);
 695 fail:
 696         return ret;
 697 }
 698
 699 static int lg216x_get_sccc_block_mode(struct lg216x_state *state,
 700                                       enum atscmh_sccc_block_mode *sccc_block)
 701 {
 702         u8 val;
 703         int ret;
 704
 705         switch (state->cfg->lg_chip) {
 706         case LG2160:
 707                 ret = lg216x_read_reg(state, 0x0315, &val);
 708                 break;
 709         case LG2161:
 710                 ret = lg216x_read_reg(state, 0x0511, &val);
 711                 break;
 712         default:
 713                 ret = -EINVAL;
 714         }
 715         if (lg_fail(ret))
 716                 goto fail;
 717
 718         switch (val & 0x03) {
 719         case 0x00:
 720                 *sccc_block = ATSCMH_SCCC_BLK_SEP;
 721                 break;
 722         case 0x01:
 723                 *sccc_block = ATSCMH_SCCC_BLK_COMB;
 724                 break;
 725         default:
 726                 *sccc_block = ATSCMH_SCCC_BLK_RES;
 727                 break;
 728         }
 729 fail:
 730         return ret;
 731 }
 732
 733 static int lg216x_get_sccc_code_mode(struct lg216x_state *state,
 734                                      enum atscmh_sccc_code_mode *mode_a,
 735                                      enum atscmh_sccc_code_mode *mode_b,
 736                                      enum atscmh_sccc_code_mode *mode_c,
 737                                      enum atscmh_sccc_code_mode *mode_d)
 738 {
 739         u8 val;
 740         int ret;
 741
 742         switch (state->cfg->lg_chip) {
 743         case LG2160:
 744                 ret = lg216x_read_reg(state, 0x0316, &val);
 745                 break;
 746         case LG2161:
 747                 ret = lg216x_read_reg(state, 0x0512, &val);
 748                 break;
 749         default:
 750                 ret = -EINVAL;
 751         }
 752         if (lg_fail(ret))
 753                 goto fail;
 754
 755         switch ((val >> 6) & 0x03) {
 756         case 0x00:
 757                 *mode_a = ATSCMH_SCCC_CODE_HLF;
 758                 break;
 759         case 0x01:
 760                 *mode_a = ATSCMH_SCCC_CODE_QTR;
 761                 break;
 762         default:
 763                 *mode_a = ATSCMH_SCCC_CODE_RES;
 764                 break;
 765         }
 766
 767         switch ((val >> 4) & 0x03) {
 768         case 0x00:
 769                 *mode_b = ATSCMH_SCCC_CODE_HLF;
 770                 break;
 771         case 0x01:
 772                 *mode_b = ATSCMH_SCCC_CODE_QTR;
 773                 break;
 774         default:
 775                 *mode_b = ATSCMH_SCCC_CODE_RES;
 776                 break;
 777         }
 778
 779         switch ((val >> 2) & 0x03) {
 780         case 0x00:
 781                 *mode_c = ATSCMH_SCCC_CODE_HLF;
 782                 break;
 783         case 0x01:
 784                 *mode_c = ATSCMH_SCCC_CODE_QTR;
 785                 break;
 786         default:
 787                 *mode_c = ATSCMH_SCCC_CODE_RES;
 788                 break;
 789         }
 790
 791         switch (val & 0x03) {
 792         case 0x00:
 793                 *mode_d = ATSCMH_SCCC_CODE_HLF;
 794                 break;
 795         case 0x01:
 796                 *mode_d = ATSCMH_SCCC_CODE_QTR;
 797                 break;
 798         default:
 799                 *mode_d = ATSCMH_SCCC_CODE_RES;
 800                 break;
 801         }
 802 fail:
 803         return ret;
 804 }
 805
 806 /* ------------------------------------------------------------------------ */
 807
 808 #if 0
 809 static int lg216x_read_fic_err_count(struct lg216x_state *state, u8 *err)
 810 {
 811         u8 fic_err;
 812         int ret;
 813
 814         *err = 0;
 815
 816         switch (state->cfg->lg_chip) {
 817         case LG2160:
 818                 ret = lg216x_read_reg(state, 0x0012, &fic_err);
 819                 break;
 820         case LG2161:
 821                 ret = lg216x_read_reg(state, 0x001e, &fic_err);
 822                 break;
 823         }
 824         if (lg_fail(ret))
 825                 goto fail;
 826
 827         *err = fic_err;
 828 fail:
 829         return ret;
 830 }
 831
 832 static int lg2160_read_crc_err_count(struct lg216x_state *state, u16 *err)
 833 {
 834         u8 crc_err1, crc_err2;
 835         int ret;
 836
 837         *err = 0;
 838
 839         ret = lg216x_read_reg(state, 0x0411, &crc_err1);
 840         if (lg_fail(ret))
 841                 goto fail;
 842
 843         ret = lg216x_read_reg(state, 0x0412, &crc_err2);
 844         if (lg_fail(ret))
 845                 goto fail;
 846
 847         *err = (u16)(((crc_err2 & 0x0f) << 8) | crc_err1);
 848 fail:
 849         return ret;
 850 }
 851
 852 static int lg2161_read_crc_err_count(struct lg216x_state *state, u16 *err)
 853 {
 854         u8 crc_err;
 855         int ret;
 856
 857         *err = 0;
 858
 859         ret = lg216x_read_reg(state, 0x0612, &crc_err);
 860         if (lg_fail(ret))
 861                 goto fail;
 862
 863         *err = (u16)crc_err;
 864 fail:
 865         return ret;
 866 }
 867
 868 static int lg216x_read_crc_err_count(struct lg216x_state *state, u16 *err)
 869 {
 870         int ret;
 871         switch (state->cfg->lg_chip) {
 872         case LG2160:
 873                 ret = lg2160_read_crc_err_count(state, err);
 874                 break;
 875         case LG2161:
 876                 ret = lg2161_read_crc_err_count(state, err);
 877                 break;
 878         default:
 879                 ret = -EINVAL;
 880                 break;
 881         }
 882         return ret;
 883 }
 884
 885 static int lg2160_read_rs_err_count(struct lg216x_state *state, u16 *err)
 886 {
 887         u8 rs_err1, rs_err2;
 888         int ret;
 889
 890         *err = 0;
 891
 892         ret = lg216x_read_reg(state, 0x0413, &rs_err1);
 893         if (lg_fail(ret))
 894                 goto fail;
 895
 896         ret = lg216x_read_reg(state, 0x0414, &rs_err2);
 897         if (lg_fail(ret))
 898                 goto fail;
 899
 900         *err = (u16)(((rs_err2 & 0x0f) << 8) | rs_err1);
 901 fail:
 902         return ret;
 903 }
 904
 905 static int lg2161_read_rs_err_count(struct lg216x_state *state, u16 *err)
 906 {
 907         u8 rs_err1, rs_err2;
 908         int ret;
 909
 910         *err = 0;
 911
 912         ret = lg216x_read_reg(state, 0x0613, &rs_err1);
 913         if (lg_fail(ret))
 914                 goto fail;
 915
 916         ret = lg216x_read_reg(state, 0x0614, &rs_err2);
 917         if (lg_fail(ret))
 918                 goto fail;
 919
 920         *err = (u16)((rs_err1 << 8) | rs_err2);
 921 fail:
 922         return ret;
 923 }
 924
 925 static int lg216x_read_rs_err_count(struct lg216x_state *state, u16 *err)
 926 {
 927         int ret;
 928         switch (state->cfg->lg_chip) {
 929         case LG2160:
 930                 ret = lg2160_read_rs_err_count(state, err);
 931                 break;
 932         case LG2161:
 933                 ret = lg2161_read_rs_err_count(state, err);
 934                 break;
 935         default:
 936                 ret = -EINVAL;
 937                 break;
 938         }
 939         return ret;
 940 }
 941 #endif
 942
 943 /* ------------------------------------------------------------------------ */
 944
 945 static int lg216x_get_frontend(struct dvb_frontend *fe,
 946                                struct dtv_frontend_properties *c)
 947 {
 948         struct lg216x_state *state = fe->demodulator_priv;
 949         int ret;
 950
 951         lg_dbg("\n");
 952
 953         c->modulation = VSB_8;
 954         c->frequency = state->current_frequency;
 955         c->delivery_system = SYS_ATSCMH;
 956
 957         ret = lg216x_get_fic_version(state,
 958                                      &c->atscmh_fic_ver);
 959         if (lg_fail(ret))
 960                 goto fail;
 961         if (state->fic_ver != c->atscmh_fic_ver) {
 962                 state->fic_ver = c->atscmh_fic_ver;
 963
 964 #if 0
 965                 ret = lg2160_get_parade_id(state,
 966                                 &c->atscmh_parade_id);
 967                 if (lg_fail(ret))
 968                         goto fail;
 969 /* #else */
 970                 c->atscmh_parade_id = state->parade_id;
 971 #endif
 972                 ret = lg216x_get_nog(state,
 973                                      &c->atscmh_nog);
 974                 if (lg_fail(ret))
 975                         goto fail;
 976                 ret = lg216x_get_tnog(state,
 977                                       &c->atscmh_tnog);
 978                 if (lg_fail(ret))
 979                         goto fail;
 980                 ret = lg216x_get_sgn(state,
 981                                      &c->atscmh_sgn);
 982                 if (lg_fail(ret))
 983                         goto fail;
 984                 ret = lg216x_get_prc(state,
 985                                      &c->atscmh_prc);
 986                 if (lg_fail(ret))
 987                         goto fail;
 988
 989                 ret = lg216x_get_rs_frame_mode(state,
 990                         (enum atscmh_rs_frame_mode *)
 991                         &c->atscmh_rs_frame_mode);
 992                 if (lg_fail(ret))
 993                         goto fail;
 994                 ret = lg216x_get_rs_frame_ensemble(state,
 995                         (enum atscmh_rs_frame_ensemble *)
 996                         &c->atscmh_rs_frame_ensemble);
 997                 if (lg_fail(ret))
 998                         goto fail;
 999                 ret = lg216x_get_rs_code_mode(state,
1000                         (enum atscmh_rs_code_mode *)
1001                         &c->atscmh_rs_code_mode_pri,
1002                         (enum atscmh_rs_code_mode *)
1003                         &c->atscmh_rs_code_mode_sec);
1004                 if (lg_fail(ret))
1005                         goto fail;
1006                 ret = lg216x_get_sccc_block_mode(state,
1007                         (enum atscmh_sccc_block_mode *)
1008                         &c->atscmh_sccc_block_mode);
1009                 if (lg_fail(ret))
1010                         goto fail;
1011                 ret = lg216x_get_sccc_code_mode(state,
1012                         (enum atscmh_sccc_code_mode *)
1013                         &c->atscmh_sccc_code_mode_a,
1014                         (enum atscmh_sccc_code_mode *)
1015                         &c->atscmh_sccc_code_mode_b,
1016                         (enum atscmh_sccc_code_mode *)
1017                         &c->atscmh_sccc_code_mode_c,
1018                         (enum atscmh_sccc_code_mode *)
1019                         &c->atscmh_sccc_code_mode_d);
1020                 if (lg_fail(ret))
1021                         goto fail;
1022         }
1023 #if 0
1024         ret = lg216x_read_fic_err_count(state,
1025                                 (u8 *)&c->atscmh_fic_err);
1026         if (lg_fail(ret))
1027                 goto fail;
1028         ret = lg216x_read_crc_err_count(state,
1029                                 &c->atscmh_crc_err);
1030         if (lg_fail(ret))
1031                 goto fail;
1032         ret = lg216x_read_rs_err_count(state,
1033                                 &c->atscmh_rs_err);
1034         if (lg_fail(ret))
1035                 goto fail;
1036
1037         switch (state->cfg->lg_chip) {
1038         case LG2160:
1039                 if (((c->atscmh_rs_err >= 240) &&
1040                      (c->atscmh_crc_err >= 240)) &&
1041                     ((jiffies_to_msecs(jiffies) - state->last_reset) > 6000))
1042                         ret = lg216x_soft_reset(state);
1043                 break;
1044         case LG2161:
1045                 /* no fix needed here (as far as we know) */
1046                 ret = 0;
1047                 break;
1048         }
1049         lg_fail(ret);
1050 #endif
1051 fail:
1052         return ret;
1053 }
1054
1055 static int lg216x_get_property(struct dvb_frontend *fe,
1056                                struct dtv_property *tvp)
1057 {
1058         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1059
1060         return (DTV_ATSCMH_FIC_VER == tvp->cmd) ?
1061                 lg216x_get_frontend(fe, c) : 0;
1062 }
1063
1064
1065 static int lg2160_set_frontend(struct dvb_frontend *fe)
1066 {
1067         struct lg216x_state *state = fe->demodulator_priv;
1068         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1069         int ret;
1070
1071         lg_dbg("(%d)\n", fe->dtv_property_cache.frequency);
1072
1073         if (fe->ops.tuner_ops.set_params) {
1074                 ret = fe->ops.tuner_ops.set_params(fe);
1075                 if (fe->ops.i2c_gate_ctrl)
1076                         fe->ops.i2c_gate_ctrl(fe, 0);
1077                 if (lg_fail(ret))
1078                         goto fail;
1079                 state->current_frequency = fe->dtv_property_cache.frequency;
1080         }
1081
1082         ret = lg2160_agc_fix(state, 0, 0);
1083         if (lg_fail(ret))
1084                 goto fail;
1085         ret = lg2160_agc_polarity(state, 0, 0);
1086         if (lg_fail(ret))
1087                 goto fail;
1088         ret = lg2160_tuner_pwr_save_polarity(state, 1);
1089         if (lg_fail(ret))
1090                 goto fail;
1091         ret = lg216x_set_if(state);
1092         if (lg_fail(ret))
1093                 goto fail;
1094         ret = lg2160_spectrum_polarity(state, state->cfg->spectral_inversion);
1095         if (lg_fail(ret))
1096                 goto fail;
1097
1098         /* be tuned before this point */
1099         ret = lg216x_soft_reset(state);
1100         if (lg_fail(ret))
1101                 goto fail;
1102
1103         ret = lg2160_tuner_pwr_save(state, 0);
1104         if (lg_fail(ret))
1105                 goto fail;
1106
1107         switch (state->cfg->lg_chip) {
1108         case LG2160:
1109                 ret = lg2160_set_spi_clock(state);
1110                 if (lg_fail(ret))
1111                         goto fail;
1112                 break;
1113         case LG2161:
1114                 ret = lg2161_set_output_interface(state);
1115                 if (lg_fail(ret))
1116                         goto fail;
1117                 break;
1118         }
1119
1120         ret = lg216x_set_parade(state, fe->dtv_property_cache.atscmh_parade_id);
1121         if (lg_fail(ret))
1122                 goto fail;
1123
1124         ret = lg216x_set_ensemble(state,
1125                         fe->dtv_property_cache.atscmh_rs_frame_ensemble);
1126         if (lg_fail(ret))
1127                 goto fail;
1128
1129         ret = lg216x_initialize(state);
1130         if (lg_fail(ret))
1131                 goto fail;
1132
1133         ret = lg216x_enable_fic(state, 1);
1134         lg_fail(ret);
1135
1136         lg216x_get_frontend(fe, c);
1137 fail:
1138         return ret;
1139 }
1140
1141 /* ------------------------------------------------------------------------ */
1142
1143 static int lg2160_read_lock_status(struct lg216x_state *state,
1144                                    int *acq_lock, int *sync_lock)
1145 {
1146         u8 val;
1147         int ret;
1148
1149         *acq_lock = 0;
1150         *sync_lock = 0;
1151
1152         ret = lg216x_read_reg(state, 0x011b, &val);
1153         if (lg_fail(ret))
1154                 goto fail;
1155
1156         *sync_lock = (val & 0x20) ? 0 : 1;
1157         *acq_lock  = (val & 0x40) ? 0 : 1;
1158 fail:
1159         return ret;
1160 }
1161
1162 #ifdef USE_LG2161_LOCK_BITS
1163 static int lg2161_read_lock_status(struct lg216x_state *state,
1164                                    int *acq_lock, int *sync_lock)
1165 {
1166         u8 val;
1167         int ret;
1168
1169         *acq_lock = 0;
1170         *sync_lock = 0;
1171
1172         ret = lg216x_read_reg(state, 0x0304, &val);
1173         if (lg_fail(ret))
1174                 goto fail;
1175
1176         *sync_lock = (val & 0x80) ? 0 : 1;
1177
1178         ret = lg216x_read_reg(state, 0x011b, &val);
1179         if (lg_fail(ret))
1180                 goto fail;
1181
1182         *acq_lock  = (val & 0x40) ? 0 : 1;
1183 fail:
1184         return ret;
1185 }
1186 #endif
1187
1188 static int lg216x_read_lock_status(struct lg216x_state *state,
1189                                    int *acq_lock, int *sync_lock)
1190 {
1191 #ifdef USE_LG2161_LOCK_BITS
1192         int ret;
1193         switch (state->cfg->lg_chip) {
1194         case LG2160:
1195                 ret = lg2160_read_lock_status(state, acq_lock, sync_lock);
1196                 break;
1197         case LG2161:
1198                 ret = lg2161_read_lock_status(state, acq_lock, sync_lock);
1199                 break;
1200         default:
1201                 ret = -EINVAL;
1202                 break;
1203         }
1204         return ret;
1205 #else
1206         return lg2160_read_lock_status(state, acq_lock, sync_lock);
1207 #endif
1208 }
1209
1210 static int lg216x_read_status(struct dvb_frontend *fe, enum fe_status *status)
1211 {
1212         struct lg216x_state *state = fe->demodulator_priv;
1213         int ret, acq_lock, sync_lock;
1214
1215         *status = 0;
1216
1217         ret = lg216x_read_lock_status(state, &acq_lock, &sync_lock);
1218         if (lg_fail(ret))
1219                 goto fail;
1220
1221         lg_dbg("%s%s\n",
1222                acq_lock  ? "SIGNALEXIST " : "",
1223                sync_lock ? "SYNCLOCK"     : "");
1224
1225         if (acq_lock)
1226                 *status |= FE_HAS_SIGNAL;
1227         if (sync_lock)
1228                 *status |= FE_HAS_SYNC;
1229
1230         if (*status)
1231                 *status |= FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_LOCK;
1232
1233 fail:
1234         return ret;
1235 }
1236
1237 /* ------------------------------------------------------------------------ */
1238
1239 static int lg2160_read_snr(struct dvb_frontend *fe, u16 *snr)
1240 {
1241         struct lg216x_state *state = fe->demodulator_priv;
1242         u8 snr1, snr2;
1243         int ret;
1244
1245         *snr = 0;
1246
1247         ret = lg216x_read_reg(state, 0x0202, &snr1);
1248         if (lg_fail(ret))
1249                 goto fail;
1250
1251         ret = lg216x_read_reg(state, 0x0203, &snr2);
1252         if (lg_fail(ret))
1253                 goto fail;
1254
1255         if ((snr1 == 0xba) || (snr2 == 0xdf))
1256                 *snr = 0;
1257         else
1258 #if 1
1259         *snr =  ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 >> 4);
1260 #else /* BCD */
1261         *snr =  (snr2 | (snr1 << 8));
1262 #endif
1263 fail:
1264         return ret;
1265 }
1266
1267 static int lg2161_read_snr(struct dvb_frontend *fe, u16 *snr)
1268 {
1269         struct lg216x_state *state = fe->demodulator_priv;
1270         u8 snr1, snr2;
1271         int ret;
1272
1273         *snr = 0;
1274
1275         ret = lg216x_read_reg(state, 0x0302, &snr1);
1276         if (lg_fail(ret))
1277                 goto fail;
1278
1279         ret = lg216x_read_reg(state, 0x0303, &snr2);
1280         if (lg_fail(ret))
1281                 goto fail;
1282
1283         if ((snr1 == 0xba) || (snr2 == 0xfd))
1284                 *snr = 0;
1285         else
1286
1287         *snr =  ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 & 0x0f);
1288 fail:
1289         return ret;
1290 }
1291
1292 static int lg216x_read_signal_strength(struct dvb_frontend *fe,
1293                                        u16 *strength)
1294 {
1295 #if 0
1296         /* borrowed from lgdt330x.c
1297          *
1298          * Calculate strength from SNR up to 35dB
1299          * Even though the SNR can go higher than 35dB,
1300          * there is some comfort factor in having a range of
1301          * strong signals that can show at 100%
1302          */
1303         struct lg216x_state *state = fe->demodulator_priv;
1304         u16 snr;
1305         int ret;
1306 #endif
1307         *strength = 0;
1308 #if 0
1309         ret = fe->ops.read_snr(fe, &snr);
1310         if (lg_fail(ret))
1311                 goto fail;
1312         /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
1313         /* scale the range 0 - 35*2^24 into 0 - 65535 */
1314         if (state->snr >= 8960 * 0x10000)
1315                 *strength = 0xffff;
1316         else
1317                 *strength = state->snr / 8960;
1318 fail:
1319         return ret;
1320 #else
1321         return 0;
1322 #endif
1323 }
1324
1325 /* ------------------------------------------------------------------------ */
1326
1327 static int lg216x_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1328 {
1329 #if 0
1330         struct lg216x_state *state = fe->demodulator_priv;
1331         int ret;
1332
1333         ret = lg216x_read_rs_err_count(state,
1334                                        &fe->dtv_property_cache.atscmh_rs_err);
1335         if (lg_fail(ret))
1336                 goto fail;
1337
1338         *ucblocks = fe->dtv_property_cache.atscmh_rs_err;
1339 fail:
1340 #else
1341         *ucblocks = 0;
1342 #endif
1343         return 0;
1344 }
1345
1346 static int lg216x_get_tune_settings(struct dvb_frontend *fe,
1347                                     struct dvb_frontend_tune_settings
1348                                     *fe_tune_settings)
1349 {
1350         fe_tune_settings->min_delay_ms = 500;
1351         lg_dbg("\n");
1352         return 0;
1353 }
1354
1355 static void lg216x_release(struct dvb_frontend *fe)
1356 {
1357         struct lg216x_state *state = fe->demodulator_priv;
1358         lg_dbg("\n");
1359         kfree(state);
1360 }
1361
1362 static struct dvb_frontend_ops lg2160_ops = {
1363         .delsys = { SYS_ATSCMH },
1364         .info = {
1365                 .name = "LG Electronics LG2160 ATSC/MH Frontend",
1366                 .frequency_min      = 54000000,
1367                 .frequency_max      = 858000000,
1368                 .frequency_stepsize = 62500,
1369         },
1370         .i2c_gate_ctrl        = lg216x_i2c_gate_ctrl,
1371 #if 0
1372         .init                 = lg216x_init,
1373         .sleep                = lg216x_sleep,
1374 #endif
1375         .get_property         = lg216x_get_property,
1376
1377         .set_frontend         = lg2160_set_frontend,
1378         .get_frontend         = lg216x_get_frontend,
1379         .get_tune_settings    = lg216x_get_tune_settings,
1380         .read_status          = lg216x_read_status,
1381 #if 0
1382         .read_ber             = lg216x_read_ber,
1383 #endif
1384         .read_signal_strength = lg216x_read_signal_strength,
1385         .read_snr             = lg2160_read_snr,
1386         .read_ucblocks        = lg216x_read_ucblocks,
1387         .release              = lg216x_release,
1388 };
1389
1390 static struct dvb_frontend_ops lg2161_ops = {
1391         .delsys = { SYS_ATSCMH },
1392         .info = {
1393                 .name = "LG Electronics LG2161 ATSC/MH Frontend",
1394                 .frequency_min      = 54000000,
1395                 .frequency_max      = 858000000,
1396                 .frequency_stepsize = 62500,
1397         },
1398         .i2c_gate_ctrl        = lg216x_i2c_gate_ctrl,
1399 #if 0
1400         .init                 = lg216x_init,
1401         .sleep                = lg216x_sleep,
1402 #endif
1403         .get_property         = lg216x_get_property,
1404
1405         .set_frontend         = lg2160_set_frontend,
1406         .get_frontend         = lg216x_get_frontend,
1407         .get_tune_settings    = lg216x_get_tune_settings,
1408         .read_status          = lg216x_read_status,
1409 #if 0
1410         .read_ber             = lg216x_read_ber,
1411 #endif
1412         .read_signal_strength = lg216x_read_signal_strength,
1413         .read_snr             = lg2161_read_snr,
1414         .read_ucblocks        = lg216x_read_ucblocks,
1415         .release              = lg216x_release,
1416 };
1417
1418 struct dvb_frontend *lg2160_attach(const struct lg2160_config *config,
1419                                    struct i2c_adapter *i2c_adap)
1420 {
1421         struct lg216x_state *state = NULL;
1422
1423         lg_dbg("(%d-%04x)\n",
1424                i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1425                config ? config->i2c_addr : 0);
1426
1427         state = kzalloc(sizeof(struct lg216x_state), GFP_KERNEL);
1428         if (!state)
1429                 return NULL;
1430
1431         state->cfg = config;
1432         state->i2c_adap = i2c_adap;
1433         state->fic_ver = 0xff;
1434         state->parade_id = 0xff;
1435
1436         switch (config->lg_chip) {
1437         default:
1438                 lg_warn("invalid chip requested, defaulting to LG2160");
1439                 /* fall-thru */
1440         case LG2160:
1441                 memcpy(&state->frontend.ops, &lg2160_ops,
1442                        sizeof(struct dvb_frontend_ops));
1443                 break;
1444         case LG2161:
1445                 memcpy(&state->frontend.ops, &lg2161_ops,
1446                        sizeof(struct dvb_frontend_ops));
1447                 break;
1448         }
1449
1450         state->frontend.demodulator_priv = state;
1451         state->current_frequency = -1;
1452         /* parade 1 by default */
1453         state->frontend.dtv_property_cache.atscmh_parade_id = 1;
1454
1455         return &state->frontend;
1456 }
1457 EXPORT_SYMBOL(lg2160_attach);
1458
1459 MODULE_DESCRIPTION("LG Electronics LG216x ATSC/MH Demodulator Driver");
1460 MODULE_AUTHOR("Michael Krufky <[email protected]>");
1461 MODULE_LICENSE("GPL");
1462 MODULE_VERSION("0.3");