drivers/media/dvb-frontends/cxd2820r_t2.c

   1 /*
   2  * Sony CXD2820R demodulator driver
   3  *
   4  * Copyright (C) 2010 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  *    You should have received a copy of the GNU General Public License along
  17  *    with this program; if not, write to the Free Software Foundation, Inc.,
  18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21
  22 #include "cxd2820r_priv.h"
  23
  24 int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
  25 {
  26         struct cxd2820r_priv *priv = fe->demodulator_priv;
  27         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  28         int ret, i, bw_i;
  29         u32 if_freq, if_ctl;
  30         u64 num;
  31         u8 buf[3], bw_param;
  32         u8 bw_params1[][5] = {
  33                 { 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
  34                 { 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
  35                 { 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
  36                 { 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
  37         };
  38         struct reg_val_mask tab[] = {
  39                 { 0x00080, 0x02, 0xff },
  40                 { 0x00081, 0x20, 0xff },
  41                 { 0x00085, 0x07, 0xff },
  42                 { 0x00088, 0x01, 0xff },
  43                 { 0x02069, 0x01, 0xff },
  44
  45                 { 0x0207f, 0x2a, 0xff },
  46                 { 0x02082, 0x0a, 0xff },
  47                 { 0x02083, 0x0a, 0xff },
  48                 { 0x020cb, priv->cfg.if_agc_polarity << 6, 0x40 },
  49                 { 0x02070, priv->cfg.ts_mode, 0xff },
  50                 { 0x02071, !priv->cfg.ts_clock_inv << 6, 0x40 },
  51                 { 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
  52                 { 0x02567, 0x07, 0x0f },
  53                 { 0x02569, 0x03, 0x03 },
  54                 { 0x02595, 0x1a, 0xff },
  55                 { 0x02596, 0x50, 0xff },
  56                 { 0x02a8c, 0x00, 0xff },
  57                 { 0x02a8d, 0x34, 0xff },
  58                 { 0x02a45, 0x06, 0x07 },
  59                 { 0x03f10, 0x0d, 0xff },
  60                 { 0x03f11, 0x02, 0xff },
  61                 { 0x03f12, 0x01, 0xff },
  62                 { 0x03f23, 0x2c, 0xff },
  63                 { 0x03f51, 0x13, 0xff },
  64                 { 0x03f52, 0x01, 0xff },
  65                 { 0x03f53, 0x00, 0xff },
  66                 { 0x027e6, 0x14, 0xff },
  67                 { 0x02786, 0x02, 0x07 },
  68                 { 0x02787, 0x40, 0xe0 },
  69                 { 0x027ef, 0x10, 0x18 },
  70         };
  71
  72         dev_dbg(&priv->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n", __func__,
  73                         c->frequency, c->bandwidth_hz);
  74
  75         switch (c->bandwidth_hz) {
  76         case 5000000:
  77                 bw_i = 0;
  78                 bw_param = 3;
  79                 break;
  80         case 6000000:
  81                 bw_i = 1;
  82                 bw_param = 2;
  83                 break;
  84         case 7000000:
  85                 bw_i = 2;
  86                 bw_param = 1;
  87                 break;
  88         case 8000000:
  89                 bw_i = 3;
  90                 bw_param = 0;
  91                 break;
  92         default:
  93                 return -EINVAL;
  94         }
  95
  96         /* program tuner */
  97         if (fe->ops.tuner_ops.set_params)
  98                 fe->ops.tuner_ops.set_params(fe);
  99
 100         if (priv->delivery_system != SYS_DVBT2) {
 101                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
 102                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
 103                                 tab[i].val, tab[i].mask);
 104                         if (ret)
 105                                 goto error;
 106                 }
 107         }
 108
 109         priv->delivery_system = SYS_DVBT2;
 110
 111         /* program IF frequency */
 112         if (fe->ops.tuner_ops.get_if_frequency) {
 113                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
 114                 if (ret)
 115                         goto error;
 116         } else
 117                 if_freq = 0;
 118
 119         dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq);
 120
 121         num = if_freq / 1000; /* Hz => kHz */
 122         num *= 0x1000000;
 123         if_ctl = DIV_ROUND_CLOSEST_ULL(num, 41000);
 124         buf[0] = ((if_ctl >> 16) & 0xff);
 125         buf[1] = ((if_ctl >>  8) & 0xff);
 126         buf[2] = ((if_ctl >>  0) & 0xff);
 127
 128         /* PLP filtering */
 129         if (c->stream_id > 255) {
 130                 dev_dbg(&priv->i2c->dev, "%s: Disable PLP filtering\n", __func__);
 131                 ret = cxd2820r_wr_reg(priv, 0x023ad , 0);
 132                 if (ret)
 133                         goto error;
 134         } else {
 135                 dev_dbg(&priv->i2c->dev, "%s: Enable PLP filtering = %d\n", __func__,
 136                                 c->stream_id);
 137                 ret = cxd2820r_wr_reg(priv, 0x023af , c->stream_id & 0xFF);
 138                 if (ret)
 139                         goto error;
 140                 ret = cxd2820r_wr_reg(priv, 0x023ad , 1);
 141                 if (ret)
 142                         goto error;
 143         }
 144
 145         ret = cxd2820r_wr_regs(priv, 0x020b6, buf, 3);
 146         if (ret)
 147                 goto error;
 148
 149         ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[bw_i], 5);
 150         if (ret)
 151                 goto error;
 152
 153         ret = cxd2820r_wr_reg_mask(priv, 0x020d7, bw_param << 6, 0xc0);
 154         if (ret)
 155                 goto error;
 156
 157         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 158         if (ret)
 159                 goto error;
 160
 161         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 162         if (ret)
 163                 goto error;
 164
 165         return ret;
 166 error:
 167         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 168         return ret;
 169
 170 }
 171
 172 int cxd2820r_get_frontend_t2(struct dvb_frontend *fe)
 173 {
 174         struct cxd2820r_priv *priv = fe->demodulator_priv;
 175         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 176         int ret;
 177         u8 buf[2];
 178
 179         ret = cxd2820r_rd_regs(priv, 0x0205c, buf, 2);
 180         if (ret)
 181                 goto error;
 182
 183         switch ((buf[0] >> 0) & 0x07) {
 184         case 0:
 185                 c->transmission_mode = TRANSMISSION_MODE_2K;
 186                 break;
 187         case 1:
 188                 c->transmission_mode = TRANSMISSION_MODE_8K;
 189                 break;
 190         case 2:
 191                 c->transmission_mode = TRANSMISSION_MODE_4K;
 192                 break;
 193         case 3:
 194                 c->transmission_mode = TRANSMISSION_MODE_1K;
 195                 break;
 196         case 4:
 197                 c->transmission_mode = TRANSMISSION_MODE_16K;
 198                 break;
 199         case 5:
 200                 c->transmission_mode = TRANSMISSION_MODE_32K;
 201                 break;
 202         }
 203
 204         switch ((buf[1] >> 4) & 0x07) {
 205         case 0:
 206                 c->guard_interval = GUARD_INTERVAL_1_32;
 207                 break;
 208         case 1:
 209                 c->guard_interval = GUARD_INTERVAL_1_16;
 210                 break;
 211         case 2:
 212                 c->guard_interval = GUARD_INTERVAL_1_8;
 213                 break;
 214         case 3:
 215                 c->guard_interval = GUARD_INTERVAL_1_4;
 216                 break;
 217         case 4:
 218                 c->guard_interval = GUARD_INTERVAL_1_128;
 219                 break;
 220         case 5:
 221                 c->guard_interval = GUARD_INTERVAL_19_128;
 222                 break;
 223         case 6:
 224                 c->guard_interval = GUARD_INTERVAL_19_256;
 225                 break;
 226         }
 227
 228         ret = cxd2820r_rd_regs(priv, 0x0225b, buf, 2);
 229         if (ret)
 230                 goto error;
 231
 232         switch ((buf[0] >> 0) & 0x07) {
 233         case 0:
 234                 c->fec_inner = FEC_1_2;
 235                 break;
 236         case 1:
 237                 c->fec_inner = FEC_3_5;
 238                 break;
 239         case 2:
 240                 c->fec_inner = FEC_2_3;
 241                 break;
 242         case 3:
 243                 c->fec_inner = FEC_3_4;
 244                 break;
 245         case 4:
 246                 c->fec_inner = FEC_4_5;
 247                 break;
 248         case 5:
 249                 c->fec_inner = FEC_5_6;
 250                 break;
 251         }
 252
 253         switch ((buf[1] >> 0) & 0x07) {
 254         case 0:
 255                 c->modulation = QPSK;
 256                 break;
 257         case 1:
 258                 c->modulation = QAM_16;
 259                 break;
 260         case 2:
 261                 c->modulation = QAM_64;
 262                 break;
 263         case 3:
 264                 c->modulation = QAM_256;
 265                 break;
 266         }
 267
 268         ret = cxd2820r_rd_reg(priv, 0x020b5, &buf[0]);
 269         if (ret)
 270                 goto error;
 271
 272         switch ((buf[0] >> 4) & 0x01) {
 273         case 0:
 274                 c->inversion = INVERSION_OFF;
 275                 break;
 276         case 1:
 277                 c->inversion = INVERSION_ON;
 278                 break;
 279         }
 280
 281         return ret;
 282 error:
 283         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 284         return ret;
 285 }
 286
 287 int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status)
 288 {
 289         struct cxd2820r_priv *priv = fe->demodulator_priv;
 290         int ret;
 291         u8 buf[1];
 292         *status = 0;
 293
 294         ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
 295         if (ret)
 296                 goto error;
 297
 298         if ((buf[0] & 0x07) == 6) {
 299                 if (((buf[0] >> 5) & 0x01) == 1) {
 300                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 301                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 302                 } else {
 303                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 304                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 305                 }
 306         }
 307
 308         dev_dbg(&priv->i2c->dev, "%s: lock=%02x\n", __func__, buf[0]);
 309
 310         return ret;
 311 error:
 312         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 313         return ret;
 314 }
 315
 316 int cxd2820r_read_ber_t2(struct dvb_frontend *fe, u32 *ber)
 317 {
 318         struct cxd2820r_priv *priv = fe->demodulator_priv;
 319         int ret;
 320         u8 buf[4];
 321         unsigned int errbits;
 322         *ber = 0;
 323         /* FIXME: correct calculation */
 324
 325         ret = cxd2820r_rd_regs(priv, 0x02039, buf, sizeof(buf));
 326         if (ret)
 327                 goto error;
 328
 329         if ((buf[0] >> 4) & 0x01) {
 330                 errbits = (buf[0] & 0x0f) << 24 | buf[1] << 16 |
 331                         buf[2] << 8 | buf[3];
 332
 333                 if (errbits)
 334                         *ber = errbits * 64 / 16588800;
 335         }
 336
 337         return ret;
 338 error:
 339         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 340         return ret;
 341 }
 342
 343 int cxd2820r_read_signal_strength_t2(struct dvb_frontend *fe,
 344         u16 *strength)
 345 {
 346         struct cxd2820r_priv *priv = fe->demodulator_priv;
 347         int ret;
 348         u8 buf[2];
 349         u16 tmp;
 350
 351         ret = cxd2820r_rd_regs(priv, 0x02026, buf, sizeof(buf));
 352         if (ret)
 353                 goto error;
 354
 355         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 356         tmp = ~tmp & 0x0fff;
 357
 358         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 359         *strength = tmp * 0xffff / 0x0fff;
 360
 361         return ret;
 362 error:
 363         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 364         return ret;
 365 }
 366
 367 int cxd2820r_read_snr_t2(struct dvb_frontend *fe, u16 *snr)
 368 {
 369         struct cxd2820r_priv *priv = fe->demodulator_priv;
 370         int ret;
 371         u8 buf[2];
 372         u16 tmp;
 373         /* report SNR in dB * 10 */
 374
 375         ret = cxd2820r_rd_regs(priv, 0x02028, buf, sizeof(buf));
 376         if (ret)
 377                 goto error;
 378
 379         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 380         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 381         if (tmp)
 382                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 383                         / 100);
 384         else
 385                 *snr = 0;
 386
 387         dev_dbg(&priv->i2c->dev, "%s: dBx10=%d val=%04x\n", __func__, *snr,
 388                         tmp);
 389
 390         return ret;
 391 error:
 392         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 393         return ret;
 394 }
 395
 396 int cxd2820r_read_ucblocks_t2(struct dvb_frontend *fe, u32 *ucblocks)
 397 {
 398         *ucblocks = 0;
 399         /* no way to read ? */
 400         return 0;
 401 }
 402
 403 int cxd2820r_sleep_t2(struct dvb_frontend *fe)
 404 {
 405         struct cxd2820r_priv *priv = fe->demodulator_priv;
 406         int ret, i;
 407         struct reg_val_mask tab[] = {
 408                 { 0x000ff, 0x1f, 0xff },
 409                 { 0x00085, 0x00, 0xff },
 410                 { 0x00088, 0x01, 0xff },
 411                 { 0x02069, 0x00, 0xff },
 412                 { 0x00081, 0x00, 0xff },
 413                 { 0x00080, 0x00, 0xff },
 414         };
 415
 416         dev_dbg(&priv->i2c->dev, "%s\n", __func__);
 417
 418         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 419                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 420                         tab[i].mask);
 421                 if (ret)
 422                         goto error;
 423         }
 424
 425         priv->delivery_system = SYS_UNDEFINED;
 426
 427         return ret;
 428 error:
 429         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 430         return ret;
 431 }
 432
 433 int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
 434         struct dvb_frontend_tune_settings *s)
 435 {
 436         s->min_delay_ms = 1500;
 437         s->step_size = fe->ops.info.frequency_stepsize * 2;
 438         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 439
 440         return 0;
 441 }