drivers/media/dvb-frontends/cxd2820r_t2.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Sony CXD2820R demodulator driver
   4  *
   5  * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
   6  */
   7
   8
   9 #include "cxd2820r_priv.h"
  10
  11 int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
  12 {
  13         struct cxd2820r_priv *priv = fe->demodulator_priv;
  14         struct i2c_client *client = priv->client[0];
  15         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  16         int ret, bw_i;
  17         unsigned int utmp;
  18         u32 if_frequency;
  19         u8 buf[3], bw_param;
  20         u8 bw_params1[][5] = {
  21                 { 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
  22                 { 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
  23                 { 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
  24                 { 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
  25         };
  26         struct reg_val_mask tab[] = {
  27                 { 0x00080, 0x02, 0xff },
  28                 { 0x00081, 0x20, 0xff },
  29                 { 0x00085, 0x07, 0xff },
  30                 { 0x00088, 0x01, 0xff },
  31                 { 0x02069, 0x01, 0xff },
  32
  33                 { 0x0207f, 0x2a, 0xff },
  34                 { 0x02082, 0x0a, 0xff },
  35                 { 0x02083, 0x0a, 0xff },
  36                 { 0x020cb, priv->if_agc_polarity << 6, 0x40 },
  37                 { 0x02070, priv->ts_mode, 0xff },
  38                 { 0x02071, !priv->ts_clk_inv << 6, 0x40 },
  39                 { 0x020b5, priv->spec_inv << 4, 0x10 },
  40                 { 0x02567, 0x07, 0x0f },
  41                 { 0x02569, 0x03, 0x03 },
  42                 { 0x02595, 0x1a, 0xff },
  43                 { 0x02596, 0x50, 0xff },
  44                 { 0x02a8c, 0x00, 0xff },
  45                 { 0x02a8d, 0x34, 0xff },
  46                 { 0x02a45, 0x06, 0x07 },
  47                 { 0x03f10, 0x0d, 0xff },
  48                 { 0x03f11, 0x02, 0xff },
  49                 { 0x03f12, 0x01, 0xff },
  50                 { 0x03f23, 0x2c, 0xff },
  51                 { 0x03f51, 0x13, 0xff },
  52                 { 0x03f52, 0x01, 0xff },
  53                 { 0x03f53, 0x00, 0xff },
  54                 { 0x027e6, 0x14, 0xff },
  55                 { 0x02786, 0x02, 0x07 },
  56                 { 0x02787, 0x40, 0xe0 },
  57                 { 0x027ef, 0x10, 0x18 },
  58         };
  59
  60         dev_dbg(&client->dev,
  61                 "delivery_system=%d modulation=%d frequency=%u bandwidth_hz=%u inversion=%d stream_id=%u\n",
  62                 c->delivery_system, c->modulation, c->frequency,
  63                 c->bandwidth_hz, c->inversion, c->stream_id);
  64
  65         switch (c->bandwidth_hz) {
  66         case 5000000:
  67                 bw_i = 0;
  68                 bw_param = 3;
  69                 break;
  70         case 6000000:
  71                 bw_i = 1;
  72                 bw_param = 2;
  73                 break;
  74         case 7000000:
  75                 bw_i = 2;
  76                 bw_param = 1;
  77                 break;
  78         case 8000000:
  79                 bw_i = 3;
  80                 bw_param = 0;
  81                 break;
  82         default:
  83                 return -EINVAL;
  84         }
  85
  86         /* program tuner */
  87         if (fe->ops.tuner_ops.set_params)
  88                 fe->ops.tuner_ops.set_params(fe);
  89
  90         if (priv->delivery_system != SYS_DVBT2) {
  91                 ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
  92                 if (ret)
  93                         goto error;
  94         }
  95
  96         priv->delivery_system = SYS_DVBT2;
  97
  98         /* program IF frequency */
  99         if (fe->ops.tuner_ops.get_if_frequency) {
 100                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
 101                 if (ret)
 102                         goto error;
 103                 dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
 104         } else {
 105                 ret = -EINVAL;
 106                 goto error;
 107         }
 108
 109         utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, CXD2820R_CLK);
 110         buf[0] = (utmp >> 16) & 0xff;
 111         buf[1] = (utmp >>  8) & 0xff;
 112         buf[2] = (utmp >>  0) & 0xff;
 113         ret = regmap_bulk_write(priv->regmap[0], 0x20b6, buf, 3);
 114         if (ret)
 115                 goto error;
 116
 117         /* PLP filtering */
 118         if (c->stream_id > 255) {
 119                 dev_dbg(&client->dev, "disable PLP filtering\n");
 120                 ret = regmap_write(priv->regmap[0], 0x23ad, 0x00);
 121                 if (ret)
 122                         goto error;
 123         } else {
 124                 dev_dbg(&client->dev, "enable PLP filtering\n");
 125                 ret = regmap_write(priv->regmap[0], 0x23af, c->stream_id & 0xff);
 126                 if (ret)
 127                         goto error;
 128                 ret = regmap_write(priv->regmap[0], 0x23ad, 0x01);
 129                 if (ret)
 130                         goto error;
 131         }
 132
 133         ret = regmap_bulk_write(priv->regmap[0], 0x209f, bw_params1[bw_i], 5);
 134         if (ret)
 135                 goto error;
 136
 137         ret = regmap_update_bits(priv->regmap[0], 0x20d7, 0xc0, bw_param << 6);
 138         if (ret)
 139                 goto error;
 140
 141         ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
 142         if (ret)
 143                 goto error;
 144
 145         ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
 146         if (ret)
 147                 goto error;
 148
 149         return ret;
 150 error:
 151         dev_dbg(&client->dev, "failed=%d\n", ret);
 152         return ret;
 153
 154 }
 155
 156 int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
 157                              struct dtv_frontend_properties *c)
 158 {
 159         struct cxd2820r_priv *priv = fe->demodulator_priv;
 160         struct i2c_client *client = priv->client[0];
 161         int ret;
 162         unsigned int utmp;
 163         u8 buf[2];
 164
 165         dev_dbg(&client->dev, "\n");
 166
 167         ret = regmap_bulk_read(priv->regmap[0], 0x205c, buf, 2);
 168         if (ret)
 169                 goto error;
 170
 171         switch ((buf[0] >> 0) & 0x07) {
 172         case 0:
 173                 c->transmission_mode = TRANSMISSION_MODE_2K;
 174                 break;
 175         case 1:
 176                 c->transmission_mode = TRANSMISSION_MODE_8K;
 177                 break;
 178         case 2:
 179                 c->transmission_mode = TRANSMISSION_MODE_4K;
 180                 break;
 181         case 3:
 182                 c->transmission_mode = TRANSMISSION_MODE_1K;
 183                 break;
 184         case 4:
 185                 c->transmission_mode = TRANSMISSION_MODE_16K;
 186                 break;
 187         case 5:
 188                 c->transmission_mode = TRANSMISSION_MODE_32K;
 189                 break;
 190         }
 191
 192         switch ((buf[1] >> 4) & 0x07) {
 193         case 0:
 194                 c->guard_interval = GUARD_INTERVAL_1_32;
 195                 break;
 196         case 1:
 197                 c->guard_interval = GUARD_INTERVAL_1_16;
 198                 break;
 199         case 2:
 200                 c->guard_interval = GUARD_INTERVAL_1_8;
 201                 break;
 202         case 3:
 203                 c->guard_interval = GUARD_INTERVAL_1_4;
 204                 break;
 205         case 4:
 206                 c->guard_interval = GUARD_INTERVAL_1_128;
 207                 break;
 208         case 5:
 209                 c->guard_interval = GUARD_INTERVAL_19_128;
 210                 break;
 211         case 6:
 212                 c->guard_interval = GUARD_INTERVAL_19_256;
 213                 break;
 214         }
 215
 216         ret = regmap_bulk_read(priv->regmap[0], 0x225b, buf, 2);
 217         if (ret)
 218                 goto error;
 219
 220         switch ((buf[0] >> 0) & 0x07) {
 221         case 0:
 222                 c->fec_inner = FEC_1_2;
 223                 break;
 224         case 1:
 225                 c->fec_inner = FEC_3_5;
 226                 break;
 227         case 2:
 228                 c->fec_inner = FEC_2_3;
 229                 break;
 230         case 3:
 231                 c->fec_inner = FEC_3_4;
 232                 break;
 233         case 4:
 234                 c->fec_inner = FEC_4_5;
 235                 break;
 236         case 5:
 237                 c->fec_inner = FEC_5_6;
 238                 break;
 239         }
 240
 241         switch ((buf[1] >> 0) & 0x07) {
 242         case 0:
 243                 c->modulation = QPSK;
 244                 break;
 245         case 1:
 246                 c->modulation = QAM_16;
 247                 break;
 248         case 2:
 249                 c->modulation = QAM_64;
 250                 break;
 251         case 3:
 252                 c->modulation = QAM_256;
 253                 break;
 254         }
 255
 256         ret = regmap_read(priv->regmap[0], 0x20b5, &utmp);
 257         if (ret)
 258                 goto error;
 259
 260         switch ((utmp >> 4) & 0x01) {
 261         case 0:
 262                 c->inversion = INVERSION_OFF;
 263                 break;
 264         case 1:
 265                 c->inversion = INVERSION_ON;
 266                 break;
 267         }
 268
 269         return ret;
 270 error:
 271         dev_dbg(&client->dev, "failed=%d\n", ret);
 272         return ret;
 273 }
 274
 275 int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status)
 276 {
 277         struct cxd2820r_priv *priv = fe->demodulator_priv;
 278         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 279         struct i2c_client *client = priv->client[0];
 280         int ret;
 281         unsigned int utmp, utmp1, utmp2;
 282         u8 buf[4];
 283
 284         /* Lock detection */
 285         ret = regmap_bulk_read(priv->regmap[0], 0x2010, &buf[0], 1);
 286         if (ret)
 287                 goto error;
 288
 289         utmp1 = (buf[0] >> 0) & 0x07;
 290         utmp2 = (buf[0] >> 5) & 0x01;
 291
 292         if (utmp1 == 6 && utmp2 == 1) {
 293                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 294                           FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 295         } else if (utmp1 == 6 || utmp2 == 1) {
 296                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 297                           FE_HAS_VITERBI | FE_HAS_SYNC;
 298         } else {
 299                 *status = 0;
 300         }
 301
 302         dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
 303                 *status, 1, buf, utmp1, utmp2);
 304
 305         /* Signal strength */
 306         if (*status & FE_HAS_SIGNAL) {
 307                 unsigned int strength;
 308
 309                 ret = regmap_bulk_read(priv->regmap[0], 0x2026, buf, 2);
 310                 if (ret)
 311                         goto error;
 312
 313                 utmp = buf[0] << 8 | buf[1] << 0;
 314                 utmp = ~utmp & 0x0fff;
 315                 /* Scale value to 0x0000-0xffff */
 316                 strength = utmp << 4 | utmp >> 8;
 317
 318                 c->strength.len = 1;
 319                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 320                 c->strength.stat[0].uvalue = strength;
 321         } else {
 322                 c->strength.len = 1;
 323                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 324         }
 325
 326         /* CNR */
 327         if (*status & FE_HAS_VITERBI) {
 328                 unsigned int cnr;
 329
 330                 ret = regmap_bulk_read(priv->regmap[0], 0x2028, buf, 2);
 331                 if (ret)
 332                         goto error;
 333
 334                 utmp = buf[0] << 8 | buf[1] << 0;
 335                 utmp = utmp & 0x0fff;
 336                 #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 337                 if (utmp)
 338                         cnr = div_u64((u64)(intlog10(utmp)
 339                                       - CXD2820R_LOG10_8_24) * 10000,
 340                                       (1 << 24));
 341                 else
 342                         cnr = 0;
 343
 344                 c->cnr.len = 1;
 345                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 346                 c->cnr.stat[0].svalue = cnr;
 347         } else {
 348                 c->cnr.len = 1;
 349                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 350         }
 351
 352         /* BER */
 353         if (*status & FE_HAS_SYNC) {
 354                 unsigned int post_bit_error;
 355
 356                 ret = regmap_bulk_read(priv->regmap[0], 0x2039, buf, 4);
 357                 if (ret)
 358                         goto error;
 359
 360                 if ((buf[0] >> 4) & 0x01) {
 361                         post_bit_error = buf[0] << 24 | buf[1] << 16 |
 362                                          buf[2] << 8 | buf[3] << 0;
 363                         post_bit_error &= 0x0fffffff;
 364                 } else {
 365                         post_bit_error = 0;
 366                 }
 367
 368                 priv->post_bit_error += post_bit_error;
 369
 370                 c->post_bit_error.len = 1;
 371                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 372                 c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
 373         } else {
 374                 c->post_bit_error.len = 1;
 375                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 376         }
 377
 378         return ret;
 379 error:
 380         dev_dbg(&client->dev, "failed=%d\n", ret);
 381         return ret;
 382 }
 383
 384 int cxd2820r_sleep_t2(struct dvb_frontend *fe)
 385 {
 386         struct cxd2820r_priv *priv = fe->demodulator_priv;
 387         struct i2c_client *client = priv->client[0];
 388         int ret;
 389         static const struct reg_val_mask tab[] = {
 390                 { 0x000ff, 0x1f, 0xff },
 391                 { 0x00085, 0x00, 0xff },
 392                 { 0x00088, 0x01, 0xff },
 393                 { 0x02069, 0x00, 0xff },
 394                 { 0x00081, 0x00, 0xff },
 395                 { 0x00080, 0x00, 0xff },
 396         };
 397
 398         dev_dbg(&client->dev, "\n");
 399
 400         ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
 401         if (ret)
 402                 goto error;
 403
 404         priv->delivery_system = SYS_UNDEFINED;
 405
 406         return ret;
 407 error:
 408         dev_dbg(&client->dev, "failed=%d\n", ret);
 409         return ret;
 410 }
 411
 412 int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
 413         struct dvb_frontend_tune_settings *s)
 414 {
 415         s->min_delay_ms = 1500;
 416         s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
 417         s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;
 418
 419         return 0;
 420 }