kernel/drivers/media/dvb-frontends/cxd2820r_t.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_t(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                 { 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
  34                 { 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
  35                 { 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
  36         };
  37         u8 bw_params2[][2] = {
  38                 { 0x1f, 0xdc }, /* 6 MHz */
  39                 { 0x12, 0xf8 }, /* 7 MHz */
  40                 { 0x01, 0xe0 }, /* 8 MHz */
  41         };
  42         struct reg_val_mask tab[] = {
  43                 { 0x00080, 0x00, 0xff },
  44                 { 0x00081, 0x03, 0xff },
  45                 { 0x00085, 0x07, 0xff },
  46                 { 0x00088, 0x01, 0xff },
  47
  48                 { 0x00070, priv->cfg.ts_mode, 0xff },
  49                 { 0x00071, !priv->cfg.ts_clock_inv << 4, 0x10 },
  50                 { 0x000cb, priv->cfg.if_agc_polarity << 6, 0x40 },
  51                 { 0x000a5, 0x00, 0x01 },
  52                 { 0x00082, 0x20, 0x60 },
  53                 { 0x000c2, 0xc3, 0xff },
  54                 { 0x0016a, 0x50, 0xff },
  55                 { 0x00427, 0x41, 0xff },
  56         };
  57
  58         dev_dbg(&priv->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n", __func__,
  59                         c->frequency, c->bandwidth_hz);
  60
  61         switch (c->bandwidth_hz) {
  62         case 6000000:
  63                 bw_i = 0;
  64                 bw_param = 2;
  65                 break;
  66         case 7000000:
  67                 bw_i = 1;
  68                 bw_param = 1;
  69                 break;
  70         case 8000000:
  71                 bw_i = 2;
  72                 bw_param = 0;
  73                 break;
  74         default:
  75                 return -EINVAL;
  76         }
  77
  78         /* program tuner */
  79         if (fe->ops.tuner_ops.set_params)
  80                 fe->ops.tuner_ops.set_params(fe);
  81
  82         if (priv->delivery_system != SYS_DVBT) {
  83                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
  84                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
  85                                 tab[i].val, tab[i].mask);
  86                         if (ret)
  87                                 goto error;
  88                 }
  89         }
  90
  91         priv->delivery_system = SYS_DVBT;
  92         priv->ber_running = false; /* tune stops BER counter */
  93
  94         /* program IF frequency */
  95         if (fe->ops.tuner_ops.get_if_frequency) {
  96                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
  97                 if (ret)
  98                         goto error;
  99         } else
 100                 if_freq = 0;
 101
 102         dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq);
 103
 104         num = if_freq / 1000; /* Hz => kHz */
 105         num *= 0x1000000;
 106         if_ctl = DIV_ROUND_CLOSEST_ULL(num, 41000);
 107         buf[0] = ((if_ctl >> 16) & 0xff);
 108         buf[1] = ((if_ctl >>  8) & 0xff);
 109         buf[2] = ((if_ctl >>  0) & 0xff);
 110
 111         ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
 112         if (ret)
 113                 goto error;
 114
 115         ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[bw_i], 5);
 116         if (ret)
 117                 goto error;
 118
 119         ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
 120         if (ret)
 121                 goto error;
 122
 123         ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[bw_i], 2);
 124         if (ret)
 125                 goto error;
 126
 127         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 128         if (ret)
 129                 goto error;
 130
 131         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 132         if (ret)
 133                 goto error;
 134
 135         return ret;
 136 error:
 137         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 138         return ret;
 139 }
 140
 141 int cxd2820r_get_frontend_t(struct dvb_frontend *fe)
 142 {
 143         struct cxd2820r_priv *priv = fe->demodulator_priv;
 144         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 145         int ret;
 146         u8 buf[2];
 147
 148         ret = cxd2820r_rd_regs(priv, 0x0002f, buf, sizeof(buf));
 149         if (ret)
 150                 goto error;
 151
 152         switch ((buf[0] >> 6) & 0x03) {
 153         case 0:
 154                 c->modulation = QPSK;
 155                 break;
 156         case 1:
 157                 c->modulation = QAM_16;
 158                 break;
 159         case 2:
 160                 c->modulation = QAM_64;
 161                 break;
 162         }
 163
 164         switch ((buf[1] >> 1) & 0x03) {
 165         case 0:
 166                 c->transmission_mode = TRANSMISSION_MODE_2K;
 167                 break;
 168         case 1:
 169                 c->transmission_mode = TRANSMISSION_MODE_8K;
 170                 break;
 171         }
 172
 173         switch ((buf[1] >> 3) & 0x03) {
 174         case 0:
 175                 c->guard_interval = GUARD_INTERVAL_1_32;
 176                 break;
 177         case 1:
 178                 c->guard_interval = GUARD_INTERVAL_1_16;
 179                 break;
 180         case 2:
 181                 c->guard_interval = GUARD_INTERVAL_1_8;
 182                 break;
 183         case 3:
 184                 c->guard_interval = GUARD_INTERVAL_1_4;
 185                 break;
 186         }
 187
 188         switch ((buf[0] >> 3) & 0x07) {
 189         case 0:
 190                 c->hierarchy = HIERARCHY_NONE;
 191                 break;
 192         case 1:
 193                 c->hierarchy = HIERARCHY_1;
 194                 break;
 195         case 2:
 196                 c->hierarchy = HIERARCHY_2;
 197                 break;
 198         case 3:
 199                 c->hierarchy = HIERARCHY_4;
 200                 break;
 201         }
 202
 203         switch ((buf[0] >> 0) & 0x07) {
 204         case 0:
 205                 c->code_rate_HP = FEC_1_2;
 206                 break;
 207         case 1:
 208                 c->code_rate_HP = FEC_2_3;
 209                 break;
 210         case 2:
 211                 c->code_rate_HP = FEC_3_4;
 212                 break;
 213         case 3:
 214                 c->code_rate_HP = FEC_5_6;
 215                 break;
 216         case 4:
 217                 c->code_rate_HP = FEC_7_8;
 218                 break;
 219         }
 220
 221         switch ((buf[1] >> 5) & 0x07) {
 222         case 0:
 223                 c->code_rate_LP = FEC_1_2;
 224                 break;
 225         case 1:
 226                 c->code_rate_LP = FEC_2_3;
 227                 break;
 228         case 2:
 229                 c->code_rate_LP = FEC_3_4;
 230                 break;
 231         case 3:
 232                 c->code_rate_LP = FEC_5_6;
 233                 break;
 234         case 4:
 235                 c->code_rate_LP = FEC_7_8;
 236                 break;
 237         }
 238
 239         ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
 240         if (ret)
 241                 goto error;
 242
 243         switch ((buf[0] >> 0) & 0x01) {
 244         case 0:
 245                 c->inversion = INVERSION_OFF;
 246                 break;
 247         case 1:
 248                 c->inversion = INVERSION_ON;
 249                 break;
 250         }
 251
 252         return ret;
 253 error:
 254         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 255         return ret;
 256 }
 257
 258 int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
 259 {
 260         struct cxd2820r_priv *priv = fe->demodulator_priv;
 261         int ret;
 262         u8 buf[3], start_ber = 0;
 263         *ber = 0;
 264
 265         if (priv->ber_running) {
 266                 ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
 267                 if (ret)
 268                         goto error;
 269
 270                 if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
 271                         *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
 272                         start_ber = 1;
 273                 }
 274         } else {
 275                 priv->ber_running = true;
 276                 start_ber = 1;
 277         }
 278
 279         if (start_ber) {
 280                 /* (re)start BER */
 281                 ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
 282                 if (ret)
 283                         goto error;
 284         }
 285
 286         return ret;
 287 error:
 288         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 289         return ret;
 290 }
 291
 292 int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
 293         u16 *strength)
 294 {
 295         struct cxd2820r_priv *priv = fe->demodulator_priv;
 296         int ret;
 297         u8 buf[2];
 298         u16 tmp;
 299
 300         ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
 301         if (ret)
 302                 goto error;
 303
 304         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 305         tmp = ~tmp & 0x0fff;
 306
 307         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 308         *strength = tmp * 0xffff / 0x0fff;
 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_snr_t(struct dvb_frontend *fe, u16 *snr)
 317 {
 318         struct cxd2820r_priv *priv = fe->demodulator_priv;
 319         int ret;
 320         u8 buf[2];
 321         u16 tmp;
 322         /* report SNR in dB * 10 */
 323
 324         ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
 325         if (ret)
 326                 goto error;
 327
 328         tmp = (buf[0] & 0x1f) << 8 | buf[1];
 329         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 330         if (tmp)
 331                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 332                         / 100);
 333         else
 334                 *snr = 0;
 335
 336         dev_dbg(&priv->i2c->dev, "%s: dBx10=%d val=%04x\n", __func__, *snr,
 337                         tmp);
 338
 339         return ret;
 340 error:
 341         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 342         return ret;
 343 }
 344
 345 int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
 346 {
 347         *ucblocks = 0;
 348         /* no way to read ? */
 349         return 0;
 350 }
 351
 352 int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
 353 {
 354         struct cxd2820r_priv *priv = fe->demodulator_priv;
 355         int ret;
 356         u8 buf[4];
 357         *status = 0;
 358
 359         ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
 360         if (ret)
 361                 goto error;
 362
 363         if ((buf[0] & 0x07) == 6) {
 364                 ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
 365                 if (ret)
 366                         goto error;
 367
 368                 if (((buf[1] >> 3) & 0x01) == 1) {
 369                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 370                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 371                 } else {
 372                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 373                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 374                 }
 375         } else {
 376                 ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
 377                 if (ret)
 378                         goto error;
 379
 380                 if ((buf[2] & 0x0f) >= 4) {
 381                         ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
 382                         if (ret)
 383                                 goto error;
 384
 385                         if (((buf[3] >> 4) & 0x01) == 1)
 386                                 *status |= FE_HAS_SIGNAL;
 387                 }
 388         }
 389
 390         dev_dbg(&priv->i2c->dev, "%s: lock=%*ph\n", __func__, 4, buf);
 391
 392         return ret;
 393 error:
 394         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 395         return ret;
 396 }
 397
 398 int cxd2820r_init_t(struct dvb_frontend *fe)
 399 {
 400         struct cxd2820r_priv *priv = fe->demodulator_priv;
 401         int ret;
 402
 403         ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
 404         if (ret)
 405                 goto error;
 406
 407         return ret;
 408 error:
 409         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 410         return ret;
 411 }
 412
 413 int cxd2820r_sleep_t(struct dvb_frontend *fe)
 414 {
 415         struct cxd2820r_priv *priv = fe->demodulator_priv;
 416         int ret, i;
 417         struct reg_val_mask tab[] = {
 418                 { 0x000ff, 0x1f, 0xff },
 419                 { 0x00085, 0x00, 0xff },
 420                 { 0x00088, 0x01, 0xff },
 421                 { 0x00081, 0x00, 0xff },
 422                 { 0x00080, 0x00, 0xff },
 423         };
 424
 425         dev_dbg(&priv->i2c->dev, "%s\n", __func__);
 426
 427         priv->delivery_system = SYS_UNDEFINED;
 428
 429         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 430                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 431                         tab[i].mask);
 432                 if (ret)
 433                         goto error;
 434         }
 435
 436         return ret;
 437 error:
 438         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 439         return ret;
 440 }
 441
 442 int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
 443         struct dvb_frontend_tune_settings *s)
 444 {
 445         s->min_delay_ms = 500;
 446         s->step_size = fe->ops.info.frequency_stepsize * 2;
 447         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 448
 449         return 0;
 450 }