drivers/media/dvb-frontends/mn88473.c

   1 /*
   2  * Panasonic MN88473 DVB-T/T2/C demodulator driver
   3  *
   4  * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
   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
  17 #include "mn88473_priv.h"
  18
  19 static int mn88473_get_tune_settings(struct dvb_frontend *fe,
  20                                      struct dvb_frontend_tune_settings *s)
  21 {
  22         s->min_delay_ms = 1000;
  23         return 0;
  24 }
  25
  26 static int mn88473_set_frontend(struct dvb_frontend *fe)
  27 {
  28         struct i2c_client *client = fe->demodulator_priv;
  29         struct mn88473_dev *dev = i2c_get_clientdata(client);
  30         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  31         int ret, i;
  32         unsigned int uitmp;
  33         u32 if_frequency;
  34         u8 delivery_system_val, if_val[3], *conf_val_ptr;
  35         u8 reg_bank2_2d_val, reg_bank0_d2_val;
  36
  37         dev_dbg(&client->dev,
  38                 "delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
  39                 c->delivery_system, c->modulation, c->frequency,
  40                 c->bandwidth_hz, c->symbol_rate, c->inversion, c->stream_id);
  41
  42         if (!dev->active) {
  43                 ret = -EAGAIN;
  44                 goto err;
  45         }
  46
  47         switch (c->delivery_system) {
  48         case SYS_DVBT:
  49                 delivery_system_val = 0x02;
  50                 reg_bank2_2d_val = 0x23;
  51                 reg_bank0_d2_val = 0x2a;
  52                 break;
  53         case SYS_DVBT2:
  54                 delivery_system_val = 0x03;
  55                 reg_bank2_2d_val = 0x3b;
  56                 reg_bank0_d2_val = 0x29;
  57                 break;
  58         case SYS_DVBC_ANNEX_A:
  59                 delivery_system_val = 0x04;
  60                 reg_bank2_2d_val = 0x3b;
  61                 reg_bank0_d2_val = 0x29;
  62                 break;
  63         default:
  64                 ret = -EINVAL;
  65                 goto err;
  66         }
  67
  68         switch (c->delivery_system) {
  69         case SYS_DVBT:
  70         case SYS_DVBT2:
  71                 switch (c->bandwidth_hz) {
  72                 case 6000000:
  73                         conf_val_ptr = "\xe9\x55\x55\x1c\x29\x1c\x29";
  74                         break;
  75                 case 7000000:
  76                         conf_val_ptr = "\xc8\x00\x00\x17\x0a\x17\x0a";
  77                         break;
  78                 case 8000000:
  79                         conf_val_ptr = "\xaf\x00\x00\x11\xec\x11\xec";
  80                         break;
  81                 default:
  82                         ret = -EINVAL;
  83                         goto err;
  84                 }
  85                 break;
  86         case SYS_DVBC_ANNEX_A:
  87                 conf_val_ptr = "\x10\xab\x0d\xae\x1d\x9d";
  88                 break;
  89         default:
  90                 break;
  91         }
  92
  93         /* Program tuner */
  94         if (fe->ops.tuner_ops.set_params) {
  95                 ret = fe->ops.tuner_ops.set_params(fe);
  96                 if (ret)
  97                         goto err;
  98         }
  99
 100         if (fe->ops.tuner_ops.get_if_frequency) {
 101                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
 102                 if (ret)
 103                         goto err;
 104
 105                 dev_dbg(&client->dev, "get_if_frequency=%u\n", if_frequency);
 106         } else {
 107                 ret = -EINVAL;
 108                 goto err;
 109         }
 110
 111         /* Calculate IF registers */
 112         uitmp = DIV_ROUND_CLOSEST_ULL((u64) if_frequency * 0x1000000, dev->clk);
 113         if_val[0] = (uitmp >> 16) & 0xff;
 114         if_val[1] = (uitmp >>  8) & 0xff;
 115         if_val[2] = (uitmp >>  0) & 0xff;
 116
 117         ret = regmap_write(dev->regmap[2], 0x05, 0x00);
 118         if (ret)
 119                 goto err;
 120         ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
 121         if (ret)
 122                 goto err;
 123         ret = regmap_write(dev->regmap[2], 0xef, 0x13);
 124         if (ret)
 125                 goto err;
 126         ret = regmap_write(dev->regmap[2], 0xf9, 0x13);
 127         if (ret)
 128                 goto err;
 129         ret = regmap_write(dev->regmap[2], 0x00, 0x18);
 130         if (ret)
 131                 goto err;
 132         ret = regmap_write(dev->regmap[2], 0x01, 0x01);
 133         if (ret)
 134                 goto err;
 135         ret = regmap_write(dev->regmap[2], 0x02, 0x21);
 136         if (ret)
 137                 goto err;
 138         ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
 139         if (ret)
 140                 goto err;
 141         ret = regmap_write(dev->regmap[2], 0x0b, 0x00);
 142         if (ret)
 143                 goto err;
 144
 145         for (i = 0; i < sizeof(if_val); i++) {
 146                 ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]);
 147                 if (ret)
 148                         goto err;
 149         }
 150
 151         switch (c->delivery_system) {
 152         case SYS_DVBT:
 153         case SYS_DVBT2:
 154                 for (i = 0; i < 7; i++) {
 155                         ret = regmap_write(dev->regmap[2], 0x13 + i,
 156                                            conf_val_ptr[i]);
 157                         if (ret)
 158                                 goto err;
 159                 }
 160                 break;
 161         case SYS_DVBC_ANNEX_A:
 162                 ret = regmap_bulk_write(dev->regmap[1], 0x10, conf_val_ptr, 6);
 163                 if (ret)
 164                         goto err;
 165                 break;
 166         default:
 167                 break;
 168         }
 169
 170         ret = regmap_write(dev->regmap[2], 0x2d, reg_bank2_2d_val);
 171         if (ret)
 172                 goto err;
 173         ret = regmap_write(dev->regmap[2], 0x2e, 0x00);
 174         if (ret)
 175                 goto err;
 176         ret = regmap_write(dev->regmap[2], 0x56, 0x0d);
 177         if (ret)
 178                 goto err;
 179         ret = regmap_bulk_write(dev->regmap[0], 0x01,
 180                                 "\xba\x13\x80\xba\x91\xdd\xe7\x28", 8);
 181         if (ret)
 182                 goto err;
 183         ret = regmap_write(dev->regmap[0], 0x0a, 0x1a);
 184         if (ret)
 185                 goto err;
 186         ret = regmap_write(dev->regmap[0], 0x13, 0x1f);
 187         if (ret)
 188                 goto err;
 189         ret = regmap_write(dev->regmap[0], 0x19, 0x03);
 190         if (ret)
 191                 goto err;
 192         ret = regmap_write(dev->regmap[0], 0x1d, 0xb0);
 193         if (ret)
 194                 goto err;
 195         ret = regmap_write(dev->regmap[0], 0x2a, 0x72);
 196         if (ret)
 197                 goto err;
 198         ret = regmap_write(dev->regmap[0], 0x2d, 0x00);
 199         if (ret)
 200                 goto err;
 201         ret = regmap_write(dev->regmap[0], 0x3c, 0x00);
 202         if (ret)
 203                 goto err;
 204         ret = regmap_write(dev->regmap[0], 0x3f, 0xf8);
 205         if (ret)
 206                 goto err;
 207         ret = regmap_bulk_write(dev->regmap[0], 0x40, "\xf4\x08", 2);
 208         if (ret)
 209                 goto err;
 210         ret = regmap_write(dev->regmap[0], 0xd2, reg_bank0_d2_val);
 211         if (ret)
 212                 goto err;
 213         ret = regmap_write(dev->regmap[0], 0xd4, 0x55);
 214         if (ret)
 215                 goto err;
 216         ret = regmap_write(dev->regmap[1], 0xbe, 0x08);
 217         if (ret)
 218                 goto err;
 219         ret = regmap_write(dev->regmap[0], 0xb2, 0x37);
 220         if (ret)
 221                 goto err;
 222         ret = regmap_write(dev->regmap[0], 0xd7, 0x04);
 223         if (ret)
 224                 goto err;
 225
 226         /* PLP */
 227         if (c->delivery_system == SYS_DVBT2) {
 228                 ret = regmap_write(dev->regmap[2], 0x36,
 229                                 (c->stream_id == NO_STREAM_ID_FILTER) ? 0 :
 230                                 c->stream_id );
 231                 if (ret)
 232                         goto err;
 233         }
 234
 235         /* Reset FSM */
 236         ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
 237         if (ret)
 238                 goto err;
 239
 240         return 0;
 241 err:
 242         dev_dbg(&client->dev, "failed=%d\n", ret);
 243         return ret;
 244 }
 245
 246 static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
 247 {
 248         struct i2c_client *client = fe->demodulator_priv;
 249         struct mn88473_dev *dev = i2c_get_clientdata(client);
 250         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 251         int ret, i, stmp;
 252         unsigned int utmp, utmp1, utmp2;
 253         u8 buf[5];
 254
 255         if (!dev->active) {
 256                 ret = -EAGAIN;
 257                 goto err;
 258         }
 259
 260         /* Lock detection */
 261         switch (c->delivery_system) {
 262         case SYS_DVBT:
 263                 ret = regmap_read(dev->regmap[0], 0x62, &utmp);
 264                 if (ret)
 265                         goto err;
 266
 267                 if (!(utmp & 0xa0)) {
 268                         if ((utmp & 0x0f) >= 0x09)
 269                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 270                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 271                                           FE_HAS_LOCK;
 272                         else if ((utmp & 0x0f) >= 0x03)
 273                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 274                 } else {
 275                         *status = 0;
 276                 }
 277                 break;
 278         case SYS_DVBT2:
 279                 ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
 280                 if (ret)
 281                         goto err;
 282
 283                 if (!(utmp & 0x40)) {
 284                         if ((utmp & 0x0f) >= 0x0d)
 285                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 286                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 287                                           FE_HAS_LOCK;
 288                         else if ((utmp & 0x0f) >= 0x0a)
 289                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 290                                           FE_HAS_VITERBI;
 291                         else if ((utmp & 0x0f) >= 0x07)
 292                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 293                 } else {
 294                         *status = 0;
 295                 }
 296                 break;
 297         case SYS_DVBC_ANNEX_A:
 298                 ret = regmap_read(dev->regmap[1], 0x85, &utmp);
 299                 if (ret)
 300                         goto err;
 301
 302                 if (!(utmp & 0x40)) {
 303                         ret = regmap_read(dev->regmap[1], 0x89, &utmp);
 304                         if (ret)
 305                                 goto err;
 306
 307                         if (utmp & 0x01)
 308                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 309                                                 FE_HAS_VITERBI | FE_HAS_SYNC |
 310                                                 FE_HAS_LOCK;
 311                 } else {
 312                         *status = 0;
 313                 }
 314                 break;
 315         default:
 316                 ret = -EINVAL;
 317                 goto err;
 318         }
 319
 320         /* Signal strength */
 321         if (*status & FE_HAS_SIGNAL) {
 322                 for (i = 0; i < 2; i++) {
 323                         ret = regmap_bulk_read(dev->regmap[2], 0x86 + i,
 324                                                &buf[i], 1);
 325                         if (ret)
 326                                 goto err;
 327                 }
 328
 329                 /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */
 330                 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
 331                 dev_dbg(&client->dev, "strength=%u\n", utmp1);
 332
 333                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 334                 c->strength.stat[0].uvalue = utmp1;
 335         } else {
 336                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 337         }
 338
 339         /* CNR */
 340         if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
 341                 /* DVB-T CNR */
 342                 ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2);
 343                 if (ret)
 344                         goto err;
 345
 346                 utmp = buf[0] << 8 | buf[1] << 0;
 347                 if (utmp) {
 348                         /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 349                         /* log10(65536) = 80807124, 0.2 = 3355443 */
 350                         stmp = div_u64(((u64)80807124 - intlog10(utmp)
 351                                         + 3355443) * 10000, 1 << 24);
 352                         dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
 353                 } else {
 354                         stmp = 0;
 355                 }
 356
 357                 c->cnr.stat[0].svalue = stmp;
 358                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 359         } else if (*status & FE_HAS_VITERBI &&
 360                    c->delivery_system == SYS_DVBT2) {
 361                 /* DVB-T2 CNR */
 362                 for (i = 0; i < 3; i++) {
 363                         ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i,
 364                                                &buf[i], 1);
 365                         if (ret)
 366                                 goto err;
 367                 }
 368
 369                 utmp = buf[1] << 8 | buf[2] << 0;
 370                 utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
 371                 if (utmp) {
 372                         if (utmp1) {
 373                                 /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */
 374                                 /* log10(16384) = 70706234, 0.6 = 10066330 */
 375                                 stmp = div_u64(((u64)70706234 - intlog10(utmp)
 376                                                 - 10066330) * 10000, 1 << 24);
 377                                 dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
 378                                         stmp, utmp);
 379                         } else {
 380                                 /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 381                                 /* log10(65536) = 80807124, 0.2 = 3355443 */
 382                                 stmp = div_u64(((u64)80807124 - intlog10(utmp)
 383                                                 + 3355443) * 10000, 1 << 24);
 384                                 dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
 385                                         stmp, utmp);
 386                         }
 387                 } else {
 388                         stmp = 0;
 389                 }
 390
 391                 c->cnr.stat[0].svalue = stmp;
 392                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 393         } else if (*status & FE_HAS_VITERBI &&
 394                    c->delivery_system == SYS_DVBC_ANNEX_A) {
 395                 /* DVB-C CNR */
 396                 ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
 397                 if (ret)
 398                         goto err;
 399
 400                 utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
 401                 utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
 402                 if (utmp1 && utmp2) {
 403                         /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
 404                         /* log10(8) = 15151336 */
 405                         stmp = div_u64(((u64)15151336 + intlog10(utmp1)
 406                                         - intlog10(utmp2)) * 10000, 1 << 24);
 407                         dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
 408                                 stmp, utmp1, utmp2);
 409                 } else {
 410                         stmp = 0;
 411                 }
 412
 413                 c->cnr.stat[0].svalue = stmp;
 414                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 415         } else {
 416                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 417         }
 418
 419         /* BER */
 420         if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT ||
 421                                       c->delivery_system == SYS_DVBC_ANNEX_A)) {
 422                 /* DVB-T & DVB-C BER */
 423                 ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5);
 424                 if (ret)
 425                         goto err;
 426
 427                 utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
 428                 utmp2 = buf[3] << 8 | buf[4] << 0;
 429                 utmp2 = utmp2 * 8 * 204;
 430                 dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n",
 431                         utmp1, utmp2);
 432
 433                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 434                 c->post_bit_error.stat[0].uvalue += utmp1;
 435                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 436                 c->post_bit_count.stat[0].uvalue += utmp2;
 437         } else {
 438                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 439                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 440         }
 441
 442         /* PER */
 443         if (*status & FE_HAS_LOCK) {
 444                 ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4);
 445                 if (ret)
 446                         goto err;
 447
 448                 utmp1 = buf[0] << 8 | buf[1] << 0;
 449                 utmp2 = buf[2] << 8 | buf[3] << 0;
 450                 dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
 451                         utmp1, utmp2);
 452
 453                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 454                 c->block_error.stat[0].uvalue += utmp1;
 455                 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
 456                 c->block_count.stat[0].uvalue += utmp2;
 457         } else {
 458                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 459                 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 460         }
 461
 462         return 0;
 463 err:
 464         dev_dbg(&client->dev, "failed=%d\n", ret);
 465         return ret;
 466 }
 467
 468 static int mn88473_init(struct dvb_frontend *fe)
 469 {
 470         struct i2c_client *client = fe->demodulator_priv;
 471         struct mn88473_dev *dev = i2c_get_clientdata(client);
 472         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 473         int ret, len, remain;
 474         unsigned int uitmp;
 475         const struct firmware *fw;
 476         const char *name = MN88473_FIRMWARE;
 477
 478         dev_dbg(&client->dev, "\n");
 479
 480         /* Check if firmware is already running */
 481         ret = regmap_read(dev->regmap[0], 0xf5, &uitmp);
 482         if (ret)
 483                 goto err;
 484
 485         if (!(uitmp & 0x01))
 486                 goto warm;
 487
 488         /* Request the firmware, this will block and timeout */
 489         ret = request_firmware(&fw, name, &client->dev);
 490         if (ret) {
 491                 dev_err(&client->dev, "firmware file '%s' not found\n", name);
 492                 goto err;
 493         }
 494
 495         dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
 496
 497         ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
 498         if (ret)
 499                 goto err_release_firmware;
 500
 501         for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) {
 502                 len = min(dev->i2c_wr_max - 1, remain);
 503                 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
 504                                         &fw->data[fw->size - remain], len);
 505                 if (ret) {
 506                         dev_err(&client->dev, "firmware download failed %d\n",
 507                                 ret);
 508                         goto err_release_firmware;
 509                 }
 510         }
 511
 512         release_firmware(fw);
 513
 514         /* Parity check of firmware */
 515         ret = regmap_read(dev->regmap[0], 0xf8, &uitmp);
 516         if (ret)
 517                 goto err;
 518
 519         if (uitmp & 0x10) {
 520                 dev_err(&client->dev, "firmware parity check failed\n");
 521                 ret = -EINVAL;
 522                 goto err;
 523         }
 524
 525         ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 526         if (ret)
 527                 goto err;
 528 warm:
 529         /* TS config */
 530         ret = regmap_write(dev->regmap[2], 0x09, 0x08);
 531         if (ret)
 532                 goto err;
 533         ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
 534         if (ret)
 535                 goto err;
 536
 537         dev->active = true;
 538
 539         /* init stats here to indicate which stats are supported */
 540         c->strength.len = 1;
 541         c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 542         c->cnr.len = 1;
 543         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 544         c->post_bit_error.len = 1;
 545         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 546         c->post_bit_count.len = 1;
 547         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 548         c->block_error.len = 1;
 549         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 550         c->block_count.len = 1;
 551         c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 552
 553         return 0;
 554 err_release_firmware:
 555         release_firmware(fw);
 556 err:
 557         dev_dbg(&client->dev, "failed=%d\n", ret);
 558         return ret;
 559 }
 560
 561 static int mn88473_sleep(struct dvb_frontend *fe)
 562 {
 563         struct i2c_client *client = fe->demodulator_priv;
 564         struct mn88473_dev *dev = i2c_get_clientdata(client);
 565         int ret;
 566
 567         dev_dbg(&client->dev, "\n");
 568
 569         dev->active = false;
 570
 571         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 572         if (ret)
 573                 goto err;
 574
 575         return 0;
 576 err:
 577         dev_dbg(&client->dev, "failed=%d\n", ret);
 578         return ret;
 579 }
 580
 581 static const struct dvb_frontend_ops mn88473_ops = {
 582         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 583         .info = {
 584                 .name = "Panasonic MN88473",
 585                 .symbol_rate_min = 1000000,
 586                 .symbol_rate_max = 7200000,
 587                 .caps = FE_CAN_FEC_1_2                 |
 588                         FE_CAN_FEC_2_3                 |
 589                         FE_CAN_FEC_3_4                 |
 590                         FE_CAN_FEC_5_6                 |
 591                         FE_CAN_FEC_7_8                 |
 592                         FE_CAN_FEC_AUTO                |
 593                         FE_CAN_QPSK                    |
 594                         FE_CAN_QAM_16                  |
 595                         FE_CAN_QAM_32                  |
 596                         FE_CAN_QAM_64                  |
 597                         FE_CAN_QAM_128                 |
 598                         FE_CAN_QAM_256                 |
 599                         FE_CAN_QAM_AUTO                |
 600                         FE_CAN_TRANSMISSION_MODE_AUTO  |
 601                         FE_CAN_GUARD_INTERVAL_AUTO     |
 602                         FE_CAN_HIERARCHY_AUTO          |
 603                         FE_CAN_MUTE_TS                 |
 604                         FE_CAN_2G_MODULATION           |
 605                         FE_CAN_MULTISTREAM
 606         },
 607
 608         .get_tune_settings = mn88473_get_tune_settings,
 609
 610         .init = mn88473_init,
 611         .sleep = mn88473_sleep,
 612
 613         .set_frontend = mn88473_set_frontend,
 614
 615         .read_status = mn88473_read_status,
 616 };
 617
 618 static int mn88473_probe(struct i2c_client *client,
 619                          const struct i2c_device_id *id)
 620 {
 621         struct mn88473_config *config = client->dev.platform_data;
 622         struct mn88473_dev *dev;
 623         int ret;
 624         unsigned int uitmp;
 625         static const struct regmap_config regmap_config = {
 626                 .reg_bits = 8,
 627                 .val_bits = 8,
 628         };
 629
 630         dev_dbg(&client->dev, "\n");
 631
 632         /* Caller really need to provide pointer for frontend we create */
 633         if (config->fe == NULL) {
 634                 dev_err(&client->dev, "frontend pointer not defined\n");
 635                 ret = -EINVAL;
 636                 goto err;
 637         }
 638
 639         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 640         if (dev == NULL) {
 641                 ret = -ENOMEM;
 642                 goto err;
 643         }
 644
 645         if (config->i2c_wr_max)
 646                 dev->i2c_wr_max = config->i2c_wr_max;
 647         else
 648                 dev->i2c_wr_max = ~0;
 649
 650         if (config->xtal)
 651                 dev->clk = config->xtal;
 652         else
 653                 dev->clk = 25000000;
 654         dev->client[0] = client;
 655         dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
 656         if (IS_ERR(dev->regmap[0])) {
 657                 ret = PTR_ERR(dev->regmap[0]);
 658                 goto err_kfree;
 659         }
 660
 661         /*
 662          * Chip has three I2C addresses for different register banks. Used
 663          * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
 664          * 0x1a and 0x1c, in order to get own I2C client for each register bank.
 665          *
 666          * Also, register bank 2 do not support sequential I/O. Only single
 667          * register write or read is allowed to that bank.
 668          */
 669         dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
 670         if (dev->client[1] == NULL) {
 671                 ret = -ENODEV;
 672                 dev_err(&client->dev, "I2C registration failed\n");
 673                 if (ret)
 674                         goto err_regmap_0_regmap_exit;
 675         }
 676         dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
 677         if (IS_ERR(dev->regmap[1])) {
 678                 ret = PTR_ERR(dev->regmap[1]);
 679                 goto err_client_1_i2c_unregister_device;
 680         }
 681         i2c_set_clientdata(dev->client[1], dev);
 682
 683         dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
 684         if (dev->client[2] == NULL) {
 685                 ret = -ENODEV;
 686                 dev_err(&client->dev, "2nd I2C registration failed\n");
 687                 if (ret)
 688                         goto err_regmap_1_regmap_exit;
 689         }
 690         dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
 691         if (IS_ERR(dev->regmap[2])) {
 692                 ret = PTR_ERR(dev->regmap[2]);
 693                 goto err_client_2_i2c_unregister_device;
 694         }
 695         i2c_set_clientdata(dev->client[2], dev);
 696
 697         /* Check demod answers with correct chip id */
 698         ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
 699         if (ret)
 700                 goto err_regmap_2_regmap_exit;
 701
 702         dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
 703
 704         if (uitmp != 0x03) {
 705                 ret = -ENODEV;
 706                 goto err_regmap_2_regmap_exit;
 707         }
 708
 709         /* Sleep because chip is active by default */
 710         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 711         if (ret)
 712                 goto err_regmap_2_regmap_exit;
 713
 714         /* Create dvb frontend */
 715         memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops));
 716         dev->frontend.demodulator_priv = client;
 717         *config->fe = &dev->frontend;
 718         i2c_set_clientdata(client, dev);
 719
 720         dev_info(&client->dev, "Panasonic MN88473 successfully identified\n");
 721
 722         return 0;
 723 err_regmap_2_regmap_exit:
 724         regmap_exit(dev->regmap[2]);
 725 err_client_2_i2c_unregister_device:
 726         i2c_unregister_device(dev->client[2]);
 727 err_regmap_1_regmap_exit:
 728         regmap_exit(dev->regmap[1]);
 729 err_client_1_i2c_unregister_device:
 730         i2c_unregister_device(dev->client[1]);
 731 err_regmap_0_regmap_exit:
 732         regmap_exit(dev->regmap[0]);
 733 err_kfree:
 734         kfree(dev);
 735 err:
 736         dev_dbg(&client->dev, "failed=%d\n", ret);
 737         return ret;
 738 }
 739
 740 static int mn88473_remove(struct i2c_client *client)
 741 {
 742         struct mn88473_dev *dev = i2c_get_clientdata(client);
 743
 744         dev_dbg(&client->dev, "\n");
 745
 746         regmap_exit(dev->regmap[2]);
 747         i2c_unregister_device(dev->client[2]);
 748
 749         regmap_exit(dev->regmap[1]);
 750         i2c_unregister_device(dev->client[1]);
 751
 752         regmap_exit(dev->regmap[0]);
 753
 754         kfree(dev);
 755
 756         return 0;
 757 }
 758
 759 static const struct i2c_device_id mn88473_id_table[] = {
 760         {"mn88473", 0},
 761         {}
 762 };
 763 MODULE_DEVICE_TABLE(i2c, mn88473_id_table);
 764
 765 static struct i2c_driver mn88473_driver = {
 766         .driver = {
 767                 .name                = "mn88473",
 768                 .suppress_bind_attrs = true,
 769         },
 770         .probe          = mn88473_probe,
 771         .remove         = mn88473_remove,
 772         .id_table       = mn88473_id_table,
 773 };
 774
 775 module_i2c_driver(mn88473_driver);
 776
 777 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 778 MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
 779 MODULE_LICENSE("GPL");
 780 MODULE_FIRMWARE(MN88473_FIRMWARE);