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                 { 0x000cb, priv->cfg.if_agc_polarity << 6, 0x40 },
  50                 { 0x000a5, 0x00, 0x01 },
  51                 { 0x00082, 0x20, 0x60 },
  52                 { 0x000c2, 0xc3, 0xff },
  53                 { 0x0016a, 0x50, 0xff },
  54                 { 0x00427, 0x41, 0xff },
  55         };
  56
  57         dev_dbg(&priv->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n", __func__,
  58                         c->frequency, c->bandwidth_hz);
  59
  60         switch (c->bandwidth_hz) {
  61         case 6000000:
  62                 bw_i = 0;
  63                 bw_param = 2;
  64                 break;
  65         case 7000000:
  66                 bw_i = 1;
  67                 bw_param = 1;
  68                 break;
  69         case 8000000:
  70                 bw_i = 2;
  71                 bw_param = 0;
  72                 break;
  73         default:
  74                 return -EINVAL;
  75         }
  76
  77         /* program tuner */
  78         if (fe->ops.tuner_ops.set_params)
  79                 fe->ops.tuner_ops.set_params(fe);
  80
  81         if (priv->delivery_system != SYS_DVBT) {
  82                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
  83                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
  84                                 tab[i].val, tab[i].mask);
  85                         if (ret)
  86                                 goto error;
  87                 }
  88         }
  89
  90         priv->delivery_system = SYS_DVBT;
  91         priv->ber_running = 0; /* tune stops BER counter */
  92
  93         /* program IF frequency */
  94         if (fe->ops.tuner_ops.get_if_frequency) {
  95                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
  96                 if (ret)
  97                         goto error;
  98         } else
  99                 if_freq = 0;
 100
 101         dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq);
 102
 103         num = if_freq / 1000; /* Hz => kHz */
 104         num *= 0x1000000;
 105         if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
 106         buf[0] = ((if_ctl >> 16) & 0xff);
 107         buf[1] = ((if_ctl >>  8) & 0xff);
 108         buf[2] = ((if_ctl >>  0) & 0xff);
 109
 110         ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
 111         if (ret)
 112                 goto error;
 113
 114         ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[bw_i], 5);
 115         if (ret)
 116                 goto error;
 117
 118         ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
 119         if (ret)
 120                 goto error;
 121
 122         ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[bw_i], 2);
 123         if (ret)
 124                 goto error;
 125
 126         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 127         if (ret)
 128                 goto error;
 129
 130         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 131         if (ret)
 132                 goto error;
 133
 134         return ret;
 135 error:
 136         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 137         return ret;
 138 }
 139
 140 int cxd2820r_get_frontend_t(struct dvb_frontend *fe)
 141 {
 142         struct cxd2820r_priv *priv = fe->demodulator_priv;
 143         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 144         int ret;
 145         u8 buf[2];
 146
 147         ret = cxd2820r_rd_regs(priv, 0x0002f, buf, sizeof(buf));
 148         if (ret)
 149                 goto error;
 150
 151         switch ((buf[0] >> 6) & 0x03) {
 152         case 0:
 153                 c->modulation = QPSK;
 154                 break;
 155         case 1:
 156                 c->modulation = QAM_16;
 157                 break;
 158         case 2:
 159                 c->modulation = QAM_64;
 160                 break;
 161         }
 162
 163         switch ((buf[1] >> 1) & 0x03) {
 164         case 0:
 165                 c->transmission_mode = TRANSMISSION_MODE_2K;
 166                 break;
 167         case 1:
 168                 c->transmission_mode = TRANSMISSION_MODE_8K;
 169                 break;
 170         }
 171
 172         switch ((buf[1] >> 3) & 0x03) {
 173         case 0:
 174                 c->guard_interval = GUARD_INTERVAL_1_32;
 175                 break;
 176         case 1:
 177                 c->guard_interval = GUARD_INTERVAL_1_16;
 178                 break;
 179         case 2:
 180                 c->guard_interval = GUARD_INTERVAL_1_8;
 181                 break;
 182         case 3:
 183                 c->guard_interval = GUARD_INTERVAL_1_4;
 184                 break;
 185         }
 186
 187         switch ((buf[0] >> 3) & 0x07) {
 188         case 0:
 189                 c->hierarchy = HIERARCHY_NONE;
 190                 break;
 191         case 1:
 192                 c->hierarchy = HIERARCHY_1;
 193                 break;
 194         case 2:
 195                 c->hierarchy = HIERARCHY_2;
 196                 break;
 197         case 3:
 198                 c->hierarchy = HIERARCHY_4;
 199                 break;
 200         }
 201
 202         switch ((buf[0] >> 0) & 0x07) {
 203         case 0:
 204                 c->code_rate_HP = FEC_1_2;
 205                 break;
 206         case 1:
 207                 c->code_rate_HP = FEC_2_3;
 208                 break;
 209         case 2:
 210                 c->code_rate_HP = FEC_3_4;
 211                 break;
 212         case 3:
 213                 c->code_rate_HP = FEC_5_6;
 214                 break;
 215         case 4:
 216                 c->code_rate_HP = FEC_7_8;
 217                 break;
 218         }
 219
 220         switch ((buf[1] >> 5) & 0x07) {
 221         case 0:
 222                 c->code_rate_LP = FEC_1_2;
 223                 break;
 224         case 1:
 225                 c->code_rate_LP = FEC_2_3;
 226                 break;
 227         case 2:
 228                 c->code_rate_LP = FEC_3_4;
 229                 break;
 230         case 3:
 231                 c->code_rate_LP = FEC_5_6;
 232                 break;
 233         case 4:
 234                 c->code_rate_LP = FEC_7_8;
 235                 break;
 236         }
 237
 238         ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
 239         if (ret)
 240                 goto error;
 241
 242         switch ((buf[0] >> 0) & 0x01) {
 243         case 0:
 244                 c->inversion = INVERSION_OFF;
 245                 break;
 246         case 1:
 247                 c->inversion = INVERSION_ON;
 248                 break;
 249         }
 250
 251         return ret;
 252 error:
 253         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 254         return ret;
 255 }
 256
 257 int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
 258 {
 259         struct cxd2820r_priv *priv = fe->demodulator_priv;
 260         int ret;
 261         u8 buf[3], start_ber = 0;
 262         *ber = 0;
 263
 264         if (priv->ber_running) {
 265                 ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
 266                 if (ret)
 267                         goto error;
 268
 269                 if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
 270                         *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
 271                         start_ber = 1;
 272                 }
 273         } else {
 274                 priv->ber_running = 1;
 275                 start_ber = 1;
 276         }
 277
 278         if (start_ber) {
 279                 /* (re)start BER */
 280                 ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
 281                 if (ret)
 282                         goto error;
 283         }
 284
 285         return ret;
 286 error:
 287         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 288         return ret;
 289 }
 290
 291 int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
 292         u16 *strength)
 293 {
 294         struct cxd2820r_priv *priv = fe->demodulator_priv;
 295         int ret;
 296         u8 buf[2];
 297         u16 tmp;
 298
 299         ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
 300         if (ret)
 301                 goto error;
 302
 303         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 304         tmp = ~tmp & 0x0fff;
 305
 306         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 307         *strength = tmp * 0xffff / 0x0fff;
 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_snr_t(struct dvb_frontend *fe, u16 *snr)
 316 {
 317         struct cxd2820r_priv *priv = fe->demodulator_priv;
 318         int ret;
 319         u8 buf[2];
 320         u16 tmp;
 321         /* report SNR in dB * 10 */
 322
 323         ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
 324         if (ret)
 325                 goto error;
 326
 327         tmp = (buf[0] & 0x1f) << 8 | buf[1];
 328         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 329         if (tmp)
 330                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 331                         / 100);
 332         else
 333                 *snr = 0;
 334
 335         dev_dbg(&priv->i2c->dev, "%s: dBx10=%d val=%04x\n", __func__, *snr,
 336                         tmp);
 337
 338         return ret;
 339 error:
 340         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 341         return ret;
 342 }
 343
 344 int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
 345 {
 346         *ucblocks = 0;
 347         /* no way to read ? */
 348         return 0;
 349 }
 350
 351 int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
 352 {
 353         struct cxd2820r_priv *priv = fe->demodulator_priv;
 354         int ret;
 355         u8 buf[4];
 356         *status = 0;
 357
 358         ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
 359         if (ret)
 360                 goto error;
 361
 362         if ((buf[0] & 0x07) == 6) {
 363                 ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
 364                 if (ret)
 365                         goto error;
 366
 367                 if (((buf[1] >> 3) & 0x01) == 1) {
 368                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 369                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 370                 } else {
 371                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 372                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 373                 }
 374         } else {
 375                 ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
 376                 if (ret)
 377                         goto error;
 378
 379                 if ((buf[2] & 0x0f) >= 4) {
 380                         ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
 381                         if (ret)
 382                                 goto error;
 383
 384                         if (((buf[3] >> 4) & 0x01) == 1)
 385                                 *status |= FE_HAS_SIGNAL;
 386                 }
 387         }
 388
 389         dev_dbg(&priv->i2c->dev, "%s: lock=%*ph\n", __func__, 4, buf);
 390
 391         return ret;
 392 error:
 393         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 394         return ret;
 395 }
 396
 397 int cxd2820r_init_t(struct dvb_frontend *fe)
 398 {
 399         struct cxd2820r_priv *priv = fe->demodulator_priv;
 400         int ret;
 401
 402         ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
 403         if (ret)
 404                 goto error;
 405
 406         return ret;
 407 error:
 408         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 409         return ret;
 410 }
 411
 412 int cxd2820r_sleep_t(struct dvb_frontend *fe)
 413 {
 414         struct cxd2820r_priv *priv = fe->demodulator_priv;
 415         int ret, i;
 416         struct reg_val_mask tab[] = {
 417                 { 0x000ff, 0x1f, 0xff },
 418                 { 0x00085, 0x00, 0xff },
 419                 { 0x00088, 0x01, 0xff },
 420                 { 0x00081, 0x00, 0xff },
 421                 { 0x00080, 0x00, 0xff },
 422         };
 423
 424         dev_dbg(&priv->i2c->dev, "%s\n", __func__);
 425
 426         priv->delivery_system = SYS_UNDEFINED;
 427
 428         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 429                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 430                         tab[i].mask);
 431                 if (ret)
 432                         goto error;
 433         }
 434
 435         return ret;
 436 error:
 437         dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
 438         return ret;
 439 }
 440
 441 int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
 442         struct dvb_frontend_tune_settings *s)
 443 {
 444         s->min_delay_ms = 500;
 445         s->step_size = fe->ops.info.frequency_stepsize * 2;
 446         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 447
 448         return 0;
 449 }