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, c->stream_id);
 229                 if (ret)
 230                         goto err;
 231         }
 232
 233         /* Reset FSM */
 234         ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
 235         if (ret)
 236                 goto err;
 237
 238         return 0;
 239 err:
 240         dev_dbg(&client->dev, "failed=%d\n", ret);
 241         return ret;
 242 }
 243
 244 static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
 245 {
 246         struct i2c_client *client = fe->demodulator_priv;
 247         struct mn88473_dev *dev = i2c_get_clientdata(client);
 248         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 249         int ret, i, stmp;
 250         unsigned int utmp, utmp1, utmp2;
 251         u8 buf[5];
 252
 253         if (!dev->active) {
 254                 ret = -EAGAIN;
 255                 goto err;
 256         }
 257
 258         /* Lock detection */
 259         switch (c->delivery_system) {
 260         case SYS_DVBT:
 261                 ret = regmap_read(dev->regmap[0], 0x62, &utmp);
 262                 if (ret)
 263                         goto err;
 264
 265                 if (!(utmp & 0xa0)) {
 266                         if ((utmp & 0x0f) >= 0x09)
 267                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 268                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 269                                           FE_HAS_LOCK;
 270                         else if ((utmp & 0x0f) >= 0x03)
 271                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 272                 } else {
 273                         *status = 0;
 274                 }
 275                 break;
 276         case SYS_DVBT2:
 277                 ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
 278                 if (ret)
 279                         goto err;
 280
 281                 if (!(utmp & 0x40)) {
 282                         if ((utmp & 0x0f) >= 0x0d)
 283                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 284                                           FE_HAS_VITERBI | FE_HAS_SYNC |
 285                                           FE_HAS_LOCK;
 286                         else if ((utmp & 0x0f) >= 0x0a)
 287                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 288                                           FE_HAS_VITERBI;
 289                         else if ((utmp & 0x0f) >= 0x07)
 290                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 291                 } else {
 292                         *status = 0;
 293                 }
 294                 break;
 295         case SYS_DVBC_ANNEX_A:
 296                 ret = regmap_read(dev->regmap[1], 0x85, &utmp);
 297                 if (ret)
 298                         goto err;
 299
 300                 if (!(utmp & 0x40)) {
 301                         ret = regmap_read(dev->regmap[1], 0x89, &utmp);
 302                         if (ret)
 303                                 goto err;
 304
 305                         if (utmp & 0x01)
 306                                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 307                                                 FE_HAS_VITERBI | FE_HAS_SYNC |
 308                                                 FE_HAS_LOCK;
 309                 } else {
 310                         *status = 0;
 311                 }
 312                 break;
 313         default:
 314                 ret = -EINVAL;
 315                 goto err;
 316         }
 317
 318         /* Signal strength */
 319         if (*status & FE_HAS_SIGNAL) {
 320                 for (i = 0; i < 2; i++) {
 321                         ret = regmap_bulk_read(dev->regmap[2], 0x86 + i,
 322                                                &buf[i], 1);
 323                         if (ret)
 324                                 goto err;
 325                 }
 326
 327                 /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */
 328                 utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2;
 329                 dev_dbg(&client->dev, "strength=%u\n", utmp1);
 330
 331                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 332                 c->strength.stat[0].uvalue = utmp1;
 333         } else {
 334                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 335         }
 336
 337         /* CNR */
 338         if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) {
 339                 /* DVB-T CNR */
 340                 ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2);
 341                 if (ret)
 342                         goto err;
 343
 344                 utmp = buf[0] << 8 | buf[1] << 0;
 345                 if (utmp) {
 346                         /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 347                         /* log10(65536) = 80807124, 0.2 = 3355443 */
 348                         stmp = div_u64(((u64)80807124 - intlog10(utmp)
 349                                         + 3355443) * 10000, 1 << 24);
 350                         dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp);
 351                 } else {
 352                         stmp = 0;
 353                 }
 354
 355                 c->cnr.stat[0].svalue = stmp;
 356                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 357         } else if (*status & FE_HAS_VITERBI &&
 358                    c->delivery_system == SYS_DVBT2) {
 359                 /* DVB-T2 CNR */
 360                 for (i = 0; i < 3; i++) {
 361                         ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i,
 362                                                &buf[i], 1);
 363                         if (ret)
 364                                 goto err;
 365                 }
 366
 367                 utmp = buf[1] << 8 | buf[2] << 0;
 368                 utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */
 369                 if (utmp) {
 370                         if (utmp1) {
 371                                 /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */
 372                                 /* log10(16384) = 70706234, 0.6 = 10066330 */
 373                                 stmp = div_u64(((u64)70706234 - intlog10(utmp)
 374                                                 - 10066330) * 10000, 1 << 24);
 375                                 dev_dbg(&client->dev, "cnr=%d value=%u MISO\n",
 376                                         stmp, utmp);
 377                         } else {
 378                                 /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */
 379                                 /* log10(65536) = 80807124, 0.2 = 3355443 */
 380                                 stmp = div_u64(((u64)80807124 - intlog10(utmp)
 381                                                 + 3355443) * 10000, 1 << 24);
 382                                 dev_dbg(&client->dev, "cnr=%d value=%u SISO\n",
 383                                         stmp, utmp);
 384                         }
 385                 } else {
 386                         stmp = 0;
 387                 }
 388
 389                 c->cnr.stat[0].svalue = stmp;
 390                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 391         } else if (*status & FE_HAS_VITERBI &&
 392                    c->delivery_system == SYS_DVBC_ANNEX_A) {
 393                 /* DVB-C CNR */
 394                 ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4);
 395                 if (ret)
 396                         goto err;
 397
 398                 utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */
 399                 utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */
 400                 if (utmp1 && utmp2) {
 401                         /* CNR[dB]: 10 * log10(8 * (signal / noise)) */
 402                         /* log10(8) = 15151336 */
 403                         stmp = div_u64(((u64)15151336 + intlog10(utmp1)
 404                                         - intlog10(utmp2)) * 10000, 1 << 24);
 405                         dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n",
 406                                 stmp, utmp1, utmp2);
 407                 } else {
 408                         stmp = 0;
 409                 }
 410
 411                 c->cnr.stat[0].svalue = stmp;
 412                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 413         } else {
 414                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 415         }
 416
 417         /* BER */
 418         if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT ||
 419                                       c->delivery_system == SYS_DVBC_ANNEX_A)) {
 420                 /* DVB-T & DVB-C BER */
 421                 ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5);
 422                 if (ret)
 423                         goto err;
 424
 425                 utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
 426                 utmp2 = buf[3] << 8 | buf[4] << 0;
 427                 utmp2 = utmp2 * 8 * 204;
 428                 dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n",
 429                         utmp1, utmp2);
 430
 431                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 432                 c->post_bit_error.stat[0].uvalue += utmp1;
 433                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 434                 c->post_bit_count.stat[0].uvalue += utmp2;
 435         } else {
 436                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 437                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 438         }
 439
 440         /* PER */
 441         if (*status & FE_HAS_LOCK) {
 442                 ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4);
 443                 if (ret)
 444                         goto err;
 445
 446                 utmp1 = buf[0] << 8 | buf[1] << 0;
 447                 utmp2 = buf[2] << 8 | buf[3] << 0;
 448                 dev_dbg(&client->dev, "block_error=%u block_count=%u\n",
 449                         utmp1, utmp2);
 450
 451                 c->block_error.stat[0].scale = FE_SCALE_COUNTER;
 452                 c->block_error.stat[0].uvalue += utmp1;
 453                 c->block_count.stat[0].scale = FE_SCALE_COUNTER;
 454                 c->block_count.stat[0].uvalue += utmp2;
 455         } else {
 456                 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 457                 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 458         }
 459
 460         return 0;
 461 err:
 462         dev_dbg(&client->dev, "failed=%d\n", ret);
 463         return ret;
 464 }
 465
 466 static int mn88473_init(struct dvb_frontend *fe)
 467 {
 468         struct i2c_client *client = fe->demodulator_priv;
 469         struct mn88473_dev *dev = i2c_get_clientdata(client);
 470         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 471         int ret, len, remain;
 472         unsigned int uitmp;
 473         const struct firmware *fw;
 474         const char *name = MN88473_FIRMWARE;
 475
 476         dev_dbg(&client->dev, "\n");
 477
 478         /* Check if firmware is already running */
 479         ret = regmap_read(dev->regmap[0], 0xf5, &uitmp);
 480         if (ret)
 481                 goto err;
 482
 483         if (!(uitmp & 0x01))
 484                 goto warm;
 485
 486         /* Request the firmware, this will block and timeout */
 487         ret = request_firmware(&fw, name, &client->dev);
 488         if (ret) {
 489                 dev_err(&client->dev, "firmware file '%s' not found\n", name);
 490                 goto err;
 491         }
 492
 493         dev_info(&client->dev, "downloading firmware from file '%s'\n", name);
 494
 495         ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
 496         if (ret)
 497                 goto err_release_firmware;
 498
 499         for (remain = fw->size; remain > 0; remain -= (dev->i2c_wr_max - 1)) {
 500                 len = min(dev->i2c_wr_max - 1, remain);
 501                 ret = regmap_bulk_write(dev->regmap[0], 0xf6,
 502                                         &fw->data[fw->size - remain], len);
 503                 if (ret) {
 504                         dev_err(&client->dev, "firmware download failed %d\n",
 505                                 ret);
 506                         goto err_release_firmware;
 507                 }
 508         }
 509
 510         release_firmware(fw);
 511
 512         /* Parity check of firmware */
 513         ret = regmap_read(dev->regmap[0], 0xf8, &uitmp);
 514         if (ret)
 515                 goto err;
 516
 517         if (uitmp & 0x10) {
 518                 dev_err(&client->dev, "firmware parity check failed\n");
 519                 ret = -EINVAL;
 520                 goto err;
 521         }
 522
 523         ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 524         if (ret)
 525                 goto err;
 526 warm:
 527         /* TS config */
 528         ret = regmap_write(dev->regmap[2], 0x09, 0x08);
 529         if (ret)
 530                 goto err;
 531         ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
 532         if (ret)
 533                 goto err;
 534
 535         dev->active = true;
 536
 537         /* init stats here to indicate which stats are supported */
 538         c->strength.len = 1;
 539         c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 540         c->cnr.len = 1;
 541         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 542         c->post_bit_error.len = 1;
 543         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 544         c->post_bit_count.len = 1;
 545         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 546         c->block_error.len = 1;
 547         c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 548         c->block_count.len = 1;
 549         c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 550
 551         return 0;
 552 err_release_firmware:
 553         release_firmware(fw);
 554 err:
 555         dev_dbg(&client->dev, "failed=%d\n", ret);
 556         return ret;
 557 }
 558
 559 static int mn88473_sleep(struct dvb_frontend *fe)
 560 {
 561         struct i2c_client *client = fe->demodulator_priv;
 562         struct mn88473_dev *dev = i2c_get_clientdata(client);
 563         int ret;
 564
 565         dev_dbg(&client->dev, "\n");
 566
 567         dev->active = false;
 568
 569         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 570         if (ret)
 571                 goto err;
 572
 573         return 0;
 574 err:
 575         dev_dbg(&client->dev, "failed=%d\n", ret);
 576         return ret;
 577 }
 578
 579 static const struct dvb_frontend_ops mn88473_ops = {
 580         .delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
 581         .info = {
 582                 .name = "Panasonic MN88473",
 583                 .symbol_rate_min = 1000000,
 584                 .symbol_rate_max = 7200000,
 585                 .caps = FE_CAN_FEC_1_2                 |
 586                         FE_CAN_FEC_2_3                 |
 587                         FE_CAN_FEC_3_4                 |
 588                         FE_CAN_FEC_5_6                 |
 589                         FE_CAN_FEC_7_8                 |
 590                         FE_CAN_FEC_AUTO                |
 591                         FE_CAN_QPSK                    |
 592                         FE_CAN_QAM_16                  |
 593                         FE_CAN_QAM_32                  |
 594                         FE_CAN_QAM_64                  |
 595                         FE_CAN_QAM_128                 |
 596                         FE_CAN_QAM_256                 |
 597                         FE_CAN_QAM_AUTO                |
 598                         FE_CAN_TRANSMISSION_MODE_AUTO  |
 599                         FE_CAN_GUARD_INTERVAL_AUTO     |
 600                         FE_CAN_HIERARCHY_AUTO          |
 601                         FE_CAN_MUTE_TS                 |
 602                         FE_CAN_2G_MODULATION           |
 603                         FE_CAN_MULTISTREAM
 604         },
 605
 606         .get_tune_settings = mn88473_get_tune_settings,
 607
 608         .init = mn88473_init,
 609         .sleep = mn88473_sleep,
 610
 611         .set_frontend = mn88473_set_frontend,
 612
 613         .read_status = mn88473_read_status,
 614 };
 615
 616 static int mn88473_probe(struct i2c_client *client,
 617                          const struct i2c_device_id *id)
 618 {
 619         struct mn88473_config *config = client->dev.platform_data;
 620         struct mn88473_dev *dev;
 621         int ret;
 622         unsigned int uitmp;
 623         static const struct regmap_config regmap_config = {
 624                 .reg_bits = 8,
 625                 .val_bits = 8,
 626         };
 627
 628         dev_dbg(&client->dev, "\n");
 629
 630         /* Caller really need to provide pointer for frontend we create */
 631         if (config->fe == NULL) {
 632                 dev_err(&client->dev, "frontend pointer not defined\n");
 633                 ret = -EINVAL;
 634                 goto err;
 635         }
 636
 637         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 638         if (dev == NULL) {
 639                 ret = -ENOMEM;
 640                 goto err;
 641         }
 642
 643         if (config->i2c_wr_max)
 644                 dev->i2c_wr_max = config->i2c_wr_max;
 645         else
 646                 dev->i2c_wr_max = ~0;
 647
 648         if (config->xtal)
 649                 dev->clk = config->xtal;
 650         else
 651                 dev->clk = 25000000;
 652         dev->client[0] = client;
 653         dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
 654         if (IS_ERR(dev->regmap[0])) {
 655                 ret = PTR_ERR(dev->regmap[0]);
 656                 goto err_kfree;
 657         }
 658
 659         /*
 660          * Chip has three I2C addresses for different register banks. Used
 661          * addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
 662          * 0x1a and 0x1c, in order to get own I2C client for each register bank.
 663          *
 664          * Also, register bank 2 do not support sequential I/O. Only single
 665          * register write or read is allowed to that bank.
 666          */
 667         dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
 668         if (dev->client[1] == NULL) {
 669                 ret = -ENODEV;
 670                 dev_err(&client->dev, "I2C registration failed\n");
 671                 if (ret)
 672                         goto err_regmap_0_regmap_exit;
 673         }
 674         dev->regmap[1] = regmap_init_i2c(dev->client[1], &regmap_config);
 675         if (IS_ERR(dev->regmap[1])) {
 676                 ret = PTR_ERR(dev->regmap[1]);
 677                 goto err_client_1_i2c_unregister_device;
 678         }
 679         i2c_set_clientdata(dev->client[1], dev);
 680
 681         dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
 682         if (dev->client[2] == NULL) {
 683                 ret = -ENODEV;
 684                 dev_err(&client->dev, "2nd I2C registration failed\n");
 685                 if (ret)
 686                         goto err_regmap_1_regmap_exit;
 687         }
 688         dev->regmap[2] = regmap_init_i2c(dev->client[2], &regmap_config);
 689         if (IS_ERR(dev->regmap[2])) {
 690                 ret = PTR_ERR(dev->regmap[2]);
 691                 goto err_client_2_i2c_unregister_device;
 692         }
 693         i2c_set_clientdata(dev->client[2], dev);
 694
 695         /* Check demod answers with correct chip id */
 696         ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
 697         if (ret)
 698                 goto err_regmap_2_regmap_exit;
 699
 700         dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
 701
 702         if (uitmp != 0x03) {
 703                 ret = -ENODEV;
 704                 goto err_regmap_2_regmap_exit;
 705         }
 706
 707         /* Sleep because chip is active by default */
 708         ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
 709         if (ret)
 710                 goto err_regmap_2_regmap_exit;
 711
 712         /* Create dvb frontend */
 713         memcpy(&dev->frontend.ops, &mn88473_ops, sizeof(dev->frontend.ops));
 714         dev->frontend.demodulator_priv = client;
 715         *config->fe = &dev->frontend;
 716         i2c_set_clientdata(client, dev);
 717
 718         dev_info(&client->dev, "Panasonic MN88473 successfully identified\n");
 719
 720         return 0;
 721 err_regmap_2_regmap_exit:
 722         regmap_exit(dev->regmap[2]);
 723 err_client_2_i2c_unregister_device:
 724         i2c_unregister_device(dev->client[2]);
 725 err_regmap_1_regmap_exit:
 726         regmap_exit(dev->regmap[1]);
 727 err_client_1_i2c_unregister_device:
 728         i2c_unregister_device(dev->client[1]);
 729 err_regmap_0_regmap_exit:
 730         regmap_exit(dev->regmap[0]);
 731 err_kfree:
 732         kfree(dev);
 733 err:
 734         dev_dbg(&client->dev, "failed=%d\n", ret);
 735         return ret;
 736 }
 737
 738 static int mn88473_remove(struct i2c_client *client)
 739 {
 740         struct mn88473_dev *dev = i2c_get_clientdata(client);
 741
 742         dev_dbg(&client->dev, "\n");
 743
 744         regmap_exit(dev->regmap[2]);
 745         i2c_unregister_device(dev->client[2]);
 746
 747         regmap_exit(dev->regmap[1]);
 748         i2c_unregister_device(dev->client[1]);
 749
 750         regmap_exit(dev->regmap[0]);
 751
 752         kfree(dev);
 753
 754         return 0;
 755 }
 756
 757 static const struct i2c_device_id mn88473_id_table[] = {
 758         {"mn88473", 0},
 759         {}
 760 };
 761 MODULE_DEVICE_TABLE(i2c, mn88473_id_table);
 762
 763 static struct i2c_driver mn88473_driver = {
 764         .driver = {
 765                 .name                = "mn88473",
 766                 .suppress_bind_attrs = true,
 767         },
 768         .probe          = mn88473_probe,
 769         .remove         = mn88473_remove,
 770         .id_table       = mn88473_id_table,
 771 };
 772
 773 module_i2c_driver(mn88473_driver);
 774
 775 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 776 MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
 777 MODULE_LICENSE("GPL");
 778 MODULE_FIRMWARE(MN88473_FIRMWARE);