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                 { 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
  51                 { 0x02567, 0x07, 0x0f },
  52                 { 0x02569, 0x03, 0x03 },
  53                 { 0x02595, 0x1a, 0xff },
  54                 { 0x02596, 0x50, 0xff },
  55                 { 0x02a8c, 0x00, 0xff },
  56                 { 0x02a8d, 0x34, 0xff },
  57                 { 0x02a45, 0x06, 0x07 },
  58                 { 0x03f10, 0x0d, 0xff },
  59                 { 0x03f11, 0x02, 0xff },
  60                 { 0x03f12, 0x01, 0xff },
  61                 { 0x03f23, 0x2c, 0xff },
  62                 { 0x03f51, 0x13, 0xff },
  63                 { 0x03f52, 0x01, 0xff },
  64                 { 0x03f53, 0x00, 0xff },
  65                 { 0x027e6, 0x14, 0xff },
  66                 { 0x02786, 0x02, 0x07 },
  67                 { 0x02787, 0x40, 0xe0 },
  68                 { 0x027ef, 0x10, 0x18 },
  69         };
  70
  71         dev_dbg(&priv->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n", __func__,
  72                         c->frequency, c->bandwidth_hz);
  73
  74         switch (c->bandwidth_hz) {
  75         case 5000000:
  76                 bw_i = 0;
  77                 bw_param = 3;
  78                 break;
  79         case 6000000:
  80                 bw_i = 1;
  81                 bw_param = 2;
  82                 break;
  83         case 7000000:
  84                 bw_i = 2;
  85                 bw_param = 1;
  86                 break;
  87         case 8000000:
  88                 bw_i = 3;
  89                 bw_param = 0;
  90                 break;
  91         default:
  92                 return -EINVAL;
  93         }
  94
  95         /* program tuner */
  96         if (fe->ops.tuner_ops.set_params)
  97                 fe->ops.tuner_ops.set_params(fe);
  98
  99         if (priv->delivery_system != SYS_DVBT2) {
 100                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
 101                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
 102                                 tab[i].val, tab[i].mask);
 103                         if (ret)
 104                                 goto error;
 105                 }
 106         }
 107
 108         priv->delivery_system = SYS_DVBT2;
 109
 110         /* program IF frequency */
 111         if (fe->ops.tuner_ops.get_if_frequency) {
 112                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
 113                 if (ret)
 114                         goto error;
 115         } else
 116                 if_freq = 0;
 117
 118         dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq);
 119
 120         num = if_freq / 1000; /* Hz => kHz */
 121         num *= 0x1000000;
 122         if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
 123         buf[0] = ((if_ctl >> 16) & 0xff);
 124         buf[1] = ((if_ctl >>  8) & 0xff);
 125         buf[2] = ((if_ctl >>  0) & 0xff);
 126
 127         /* PLP filtering */
 128         if (c->stream_id > 255) {
 129                 dev_dbg(&priv->i2c->dev, "%s: Disable PLP filtering\n", __func__);
 130                 ret = cxd2820r_wr_reg(priv, 0x023ad , 0);
 131                 if (ret)
 132                         goto error;
 133         } else {
 134                 dev_dbg(&priv->i2c->dev, "%s: Enable PLP filtering = %d\n", __func__,
 135                                 c->stream_id);
 136                 ret = cxd2820r_wr_reg(priv, 0x023af , c->stream_id & 0xFF);
 137                 if (ret)
 138                         goto error;
 139                 ret = cxd2820r_wr_reg(priv, 0x023ad , 1);
 140                 if (ret)
 141                         goto error;
 142         }
 143
 144         ret = cxd2820r_wr_regs(priv, 0x020b6, buf, 3);
 145         if (ret)
 146                 goto error;
 147
 148         ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[bw_i], 5);
 149         if (ret)
 150                 goto error;
 151
 152         ret = cxd2820r_wr_reg_mask(priv, 0x020d7, bw_param << 6, 0xc0);
 153         if (ret)
 154                 goto error;
 155
 156         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 157         if (ret)
 158                 goto error;
 159
 160         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 161         if (ret)
 162                 goto error;
 163
 164         return ret;
 165 error:
 166         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 167         return ret;
 168
 169 }
 170
 171 int cxd2820r_get_frontend_t2(struct dvb_frontend *fe)
 172 {
 173         struct cxd2820r_priv *priv = fe->demodulator_priv;
 174         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 175         int ret;
 176         u8 buf[2];
 177
 178         ret = cxd2820r_rd_regs(priv, 0x0205c, buf, 2);
 179         if (ret)
 180                 goto error;
 181
 182         switch ((buf[0] >> 0) & 0x07) {
 183         case 0:
 184                 c->transmission_mode = TRANSMISSION_MODE_2K;
 185                 break;
 186         case 1:
 187                 c->transmission_mode = TRANSMISSION_MODE_8K;
 188                 break;
 189         case 2:
 190                 c->transmission_mode = TRANSMISSION_MODE_4K;
 191                 break;
 192         case 3:
 193                 c->transmission_mode = TRANSMISSION_MODE_1K;
 194                 break;
 195         case 4:
 196                 c->transmission_mode = TRANSMISSION_MODE_16K;
 197                 break;
 198         case 5:
 199                 c->transmission_mode = TRANSMISSION_MODE_32K;
 200                 break;
 201         }
 202
 203         switch ((buf[1] >> 4) & 0x07) {
 204         case 0:
 205                 c->guard_interval = GUARD_INTERVAL_1_32;
 206                 break;
 207         case 1:
 208                 c->guard_interval = GUARD_INTERVAL_1_16;
 209                 break;
 210         case 2:
 211                 c->guard_interval = GUARD_INTERVAL_1_8;
 212                 break;
 213         case 3:
 214                 c->guard_interval = GUARD_INTERVAL_1_4;
 215                 break;
 216         case 4:
 217                 c->guard_interval = GUARD_INTERVAL_1_128;
 218                 break;
 219         case 5:
 220                 c->guard_interval = GUARD_INTERVAL_19_128;
 221                 break;
 222         case 6:
 223                 c->guard_interval = GUARD_INTERVAL_19_256;
 224                 break;
 225         }
 226
 227         ret = cxd2820r_rd_regs(priv, 0x0225b, buf, 2);
 228         if (ret)
 229                 goto error;
 230
 231         switch ((buf[0] >> 0) & 0x07) {
 232         case 0:
 233                 c->fec_inner = FEC_1_2;
 234                 break;
 235         case 1:
 236                 c->fec_inner = FEC_3_5;
 237                 break;
 238         case 2:
 239                 c->fec_inner = FEC_2_3;
 240                 break;
 241         case 3:
 242                 c->fec_inner = FEC_3_4;
 243                 break;
 244         case 4:
 245                 c->fec_inner = FEC_4_5;
 246                 break;
 247         case 5:
 248                 c->fec_inner = FEC_5_6;
 249                 break;
 250         }
 251
 252         switch ((buf[1] >> 0) & 0x07) {
 253         case 0:
 254                 c->modulation = QPSK;
 255                 break;
 256         case 1:
 257                 c->modulation = QAM_16;
 258                 break;
 259         case 2:
 260                 c->modulation = QAM_64;
 261                 break;
 262         case 3:
 263                 c->modulation = QAM_256;
 264                 break;
 265         }
 266
 267         ret = cxd2820r_rd_reg(priv, 0x020b5, &buf[0]);
 268         if (ret)
 269                 goto error;
 270
 271         switch ((buf[0] >> 4) & 0x01) {
 272         case 0:
 273                 c->inversion = INVERSION_OFF;
 274                 break;
 275         case 1:
 276                 c->inversion = INVERSION_ON;
 277                 break;
 278         }
 279
 280         return ret;
 281 error:
 282         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 283         return ret;
 284 }
 285
 286 int cxd2820r_read_status_t2(struct dvb_frontend *fe, fe_status_t *status)
 287 {
 288         struct cxd2820r_priv *priv = fe->demodulator_priv;
 289         int ret;
 290         u8 buf[1];
 291         *status = 0;
 292
 293         ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
 294         if (ret)
 295                 goto error;
 296
 297         if ((buf[0] & 0x07) == 6) {
 298                 if (((buf[0] >> 5) & 0x01) == 1) {
 299                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 300                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 301                 } else {
 302                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 303                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 304                 }
 305         }
 306
 307         dev_dbg(&priv->i2c->dev, "%s: lock=%02x\n", __func__, buf[0]);
 308
 309         return ret;
 310 error:
 311         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 312         return ret;
 313 }
 314
 315 int cxd2820r_read_ber_t2(struct dvb_frontend *fe, u32 *ber)
 316 {
 317         struct cxd2820r_priv *priv = fe->demodulator_priv;
 318         int ret;
 319         u8 buf[4];
 320         unsigned int errbits;
 321         *ber = 0;
 322         /* FIXME: correct calculation */
 323
 324         ret = cxd2820r_rd_regs(priv, 0x02039, buf, sizeof(buf));
 325         if (ret)
 326                 goto error;
 327
 328         if ((buf[0] >> 4) & 0x01) {
 329                 errbits = (buf[0] & 0x0f) << 24 | buf[1] << 16 |
 330                         buf[2] << 8 | buf[3];
 331
 332                 if (errbits)
 333                         *ber = errbits * 64 / 16588800;
 334         }
 335
 336         return ret;
 337 error:
 338         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 339         return ret;
 340 }
 341
 342 int cxd2820r_read_signal_strength_t2(struct dvb_frontend *fe,
 343         u16 *strength)
 344 {
 345         struct cxd2820r_priv *priv = fe->demodulator_priv;
 346         int ret;
 347         u8 buf[2];
 348         u16 tmp;
 349
 350         ret = cxd2820r_rd_regs(priv, 0x02026, buf, sizeof(buf));
 351         if (ret)
 352                 goto error;
 353
 354         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 355         tmp = ~tmp & 0x0fff;
 356
 357         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 358         *strength = tmp * 0xffff / 0x0fff;
 359
 360         return ret;
 361 error:
 362         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 363         return ret;
 364 }
 365
 366 int cxd2820r_read_snr_t2(struct dvb_frontend *fe, u16 *snr)
 367 {
 368         struct cxd2820r_priv *priv = fe->demodulator_priv;
 369         int ret;
 370         u8 buf[2];
 371         u16 tmp;
 372         /* report SNR in dB * 10 */
 373
 374         ret = cxd2820r_rd_regs(priv, 0x02028, buf, sizeof(buf));
 375         if (ret)
 376                 goto error;
 377
 378         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 379         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 380         if (tmp)
 381                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 382                         / 100);
 383         else
 384                 *snr = 0;
 385
 386         dev_dbg(&priv->i2c->dev, "%s: dBx10=%d val=%04x\n", __func__, *snr,
 387                         tmp);
 388
 389         return ret;
 390 error:
 391         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 392         return ret;
 393 }
 394
 395 int cxd2820r_read_ucblocks_t2(struct dvb_frontend *fe, u32 *ucblocks)
 396 {
 397         *ucblocks = 0;
 398         /* no way to read ? */
 399         return 0;
 400 }
 401
 402 int cxd2820r_sleep_t2(struct dvb_frontend *fe)
 403 {
 404         struct cxd2820r_priv *priv = fe->demodulator_priv;
 405         int ret, i;
 406         struct reg_val_mask tab[] = {
 407                 { 0x000ff, 0x1f, 0xff },
 408                 { 0x00085, 0x00, 0xff },
 409                 { 0x00088, 0x01, 0xff },
 410                 { 0x02069, 0x00, 0xff },
 411                 { 0x00081, 0x00, 0xff },
 412                 { 0x00080, 0x00, 0xff },
 413         };
 414
 415         dev_dbg(&priv->i2c->dev, "%s\n", __func__);
 416
 417         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 418                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 419                         tab[i].mask);
 420                 if (ret)
 421                         goto error;
 422         }
 423
 424         priv->delivery_system = SYS_UNDEFINED;
 425
 426         return ret;
 427 error:
 428         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 429         return ret;
 430 }
 431
 432 int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
 433         struct dvb_frontend_tune_settings *s)
 434 {
 435         s->min_delay_ms = 1500;
 436         s->step_size = fe->ops.info.frequency_stepsize * 2;
 437         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 438
 439         return 0;
 440 }