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         dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
  58
  59         switch (c->bandwidth_hz) {
  60         case 6000000:
  61                 bw_i = 0;
  62                 bw_param = 2;
  63                 break;
  64         case 7000000:
  65                 bw_i = 1;
  66                 bw_param = 1;
  67                 break;
  68         case 8000000:
  69                 bw_i = 2;
  70                 bw_param = 0;
  71                 break;
  72         default:
  73                 return -EINVAL;
  74         }
  75
  76         /* update GPIOs */
  77         ret = cxd2820r_gpio(fe);
  78         if (ret)
  79                 goto error;
  80
  81         /* program tuner */
  82         if (fe->ops.tuner_ops.set_params)
  83                 fe->ops.tuner_ops.set_params(fe);
  84
  85         if (priv->delivery_system != SYS_DVBT) {
  86                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
  87                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
  88                                 tab[i].val, tab[i].mask);
  89                         if (ret)
  90                                 goto error;
  91                 }
  92         }
  93
  94         priv->delivery_system = SYS_DVBT;
  95         priv->ber_running = 0; /* tune stops BER counter */
  96
  97         /* program IF frequency */
  98         if (fe->ops.tuner_ops.get_if_frequency) {
  99                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
 100                 if (ret)
 101                         goto error;
 102         } else
 103                 if_freq = 0;
 104
 105         dbg("%s: if_freq=%d", __func__, if_freq);
 106
 107         num = if_freq / 1000; /* Hz => kHz */
 108         num *= 0x1000000;
 109         if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
 110         buf[0] = ((if_ctl >> 16) & 0xff);
 111         buf[1] = ((if_ctl >>  8) & 0xff);
 112         buf[2] = ((if_ctl >>  0) & 0xff);
 113
 114         ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
 115         if (ret)
 116                 goto error;
 117
 118         ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[bw_i], 5);
 119         if (ret)
 120                 goto error;
 121
 122         ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
 123         if (ret)
 124                 goto error;
 125
 126         ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[bw_i], 2);
 127         if (ret)
 128                 goto error;
 129
 130         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 131         if (ret)
 132                 goto error;
 133
 134         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 135         if (ret)
 136                 goto error;
 137
 138         return ret;
 139 error:
 140         dbg("%s: failed:%d", __func__, ret);
 141         return ret;
 142 }
 143
 144 int cxd2820r_get_frontend_t(struct dvb_frontend *fe)
 145 {
 146         struct cxd2820r_priv *priv = fe->demodulator_priv;
 147         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 148         int ret;
 149         u8 buf[2];
 150
 151         ret = cxd2820r_rd_regs(priv, 0x0002f, buf, sizeof(buf));
 152         if (ret)
 153                 goto error;
 154
 155         switch ((buf[0] >> 6) & 0x03) {
 156         case 0:
 157                 c->modulation = QPSK;
 158                 break;
 159         case 1:
 160                 c->modulation = QAM_16;
 161                 break;
 162         case 2:
 163                 c->modulation = QAM_64;
 164                 break;
 165         }
 166
 167         switch ((buf[1] >> 1) & 0x03) {
 168         case 0:
 169                 c->transmission_mode = TRANSMISSION_MODE_2K;
 170                 break;
 171         case 1:
 172                 c->transmission_mode = TRANSMISSION_MODE_8K;
 173                 break;
 174         }
 175
 176         switch ((buf[1] >> 3) & 0x03) {
 177         case 0:
 178                 c->guard_interval = GUARD_INTERVAL_1_32;
 179                 break;
 180         case 1:
 181                 c->guard_interval = GUARD_INTERVAL_1_16;
 182                 break;
 183         case 2:
 184                 c->guard_interval = GUARD_INTERVAL_1_8;
 185                 break;
 186         case 3:
 187                 c->guard_interval = GUARD_INTERVAL_1_4;
 188                 break;
 189         }
 190
 191         switch ((buf[0] >> 3) & 0x07) {
 192         case 0:
 193                 c->hierarchy = HIERARCHY_NONE;
 194                 break;
 195         case 1:
 196                 c->hierarchy = HIERARCHY_1;
 197                 break;
 198         case 2:
 199                 c->hierarchy = HIERARCHY_2;
 200                 break;
 201         case 3:
 202                 c->hierarchy = HIERARCHY_4;
 203                 break;
 204         }
 205
 206         switch ((buf[0] >> 0) & 0x07) {
 207         case 0:
 208                 c->code_rate_HP = FEC_1_2;
 209                 break;
 210         case 1:
 211                 c->code_rate_HP = FEC_2_3;
 212                 break;
 213         case 2:
 214                 c->code_rate_HP = FEC_3_4;
 215                 break;
 216         case 3:
 217                 c->code_rate_HP = FEC_5_6;
 218                 break;
 219         case 4:
 220                 c->code_rate_HP = FEC_7_8;
 221                 break;
 222         }
 223
 224         switch ((buf[1] >> 5) & 0x07) {
 225         case 0:
 226                 c->code_rate_LP = FEC_1_2;
 227                 break;
 228         case 1:
 229                 c->code_rate_LP = FEC_2_3;
 230                 break;
 231         case 2:
 232                 c->code_rate_LP = FEC_3_4;
 233                 break;
 234         case 3:
 235                 c->code_rate_LP = FEC_5_6;
 236                 break;
 237         case 4:
 238                 c->code_rate_LP = FEC_7_8;
 239                 break;
 240         }
 241
 242         ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
 243         if (ret)
 244                 goto error;
 245
 246         switch ((buf[0] >> 0) & 0x01) {
 247         case 0:
 248                 c->inversion = INVERSION_OFF;
 249                 break;
 250         case 1:
 251                 c->inversion = INVERSION_ON;
 252                 break;
 253         }
 254
 255         return ret;
 256 error:
 257         dbg("%s: failed:%d", __func__, ret);
 258         return ret;
 259 }
 260
 261 int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
 262 {
 263         struct cxd2820r_priv *priv = fe->demodulator_priv;
 264         int ret;
 265         u8 buf[3], start_ber = 0;
 266         *ber = 0;
 267
 268         if (priv->ber_running) {
 269                 ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
 270                 if (ret)
 271                         goto error;
 272
 273                 if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
 274                         *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
 275                         start_ber = 1;
 276                 }
 277         } else {
 278                 priv->ber_running = 1;
 279                 start_ber = 1;
 280         }
 281
 282         if (start_ber) {
 283                 /* (re)start BER */
 284                 ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
 285                 if (ret)
 286                         goto error;
 287         }
 288
 289         return ret;
 290 error:
 291         dbg("%s: failed:%d", __func__, ret);
 292         return ret;
 293 }
 294
 295 int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
 296         u16 *strength)
 297 {
 298         struct cxd2820r_priv *priv = fe->demodulator_priv;
 299         int ret;
 300         u8 buf[2];
 301         u16 tmp;
 302
 303         ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
 304         if (ret)
 305                 goto error;
 306
 307         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 308         tmp = ~tmp & 0x0fff;
 309
 310         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 311         *strength = tmp * 0xffff / 0x0fff;
 312
 313         return ret;
 314 error:
 315         dbg("%s: failed:%d", __func__, ret);
 316         return ret;
 317 }
 318
 319 int cxd2820r_read_snr_t(struct dvb_frontend *fe, u16 *snr)
 320 {
 321         struct cxd2820r_priv *priv = fe->demodulator_priv;
 322         int ret;
 323         u8 buf[2];
 324         u16 tmp;
 325         /* report SNR in dB * 10 */
 326
 327         ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
 328         if (ret)
 329                 goto error;
 330
 331         tmp = (buf[0] & 0x1f) << 8 | buf[1];
 332         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 333         if (tmp)
 334                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 335                         / 100);
 336         else
 337                 *snr = 0;
 338
 339         dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
 340
 341         return ret;
 342 error:
 343         dbg("%s: failed:%d", __func__, ret);
 344         return ret;
 345 }
 346
 347 int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
 348 {
 349         *ucblocks = 0;
 350         /* no way to read ? */
 351         return 0;
 352 }
 353
 354 int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
 355 {
 356         struct cxd2820r_priv *priv = fe->demodulator_priv;
 357         int ret;
 358         u8 buf[4];
 359         *status = 0;
 360
 361         ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
 362         if (ret)
 363                 goto error;
 364
 365         if ((buf[0] & 0x07) == 6) {
 366                 ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
 367                 if (ret)
 368                         goto error;
 369
 370                 if (((buf[1] >> 3) & 0x01) == 1) {
 371                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 372                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 373                 } else {
 374                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 375                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 376                 }
 377         } else {
 378                 ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
 379                 if (ret)
 380                         goto error;
 381
 382                 if ((buf[2] & 0x0f) >= 4) {
 383                         ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
 384                         if (ret)
 385                                 goto error;
 386
 387                         if (((buf[3] >> 4) & 0x01) == 1)
 388                                 *status |= FE_HAS_SIGNAL;
 389                 }
 390         }
 391
 392         dbg("%s: lock=%02x %02x %02x %02x", __func__,
 393                 buf[0], buf[1], buf[2], buf[3]);
 394
 395         return ret;
 396 error:
 397         dbg("%s: failed:%d", __func__, ret);
 398         return ret;
 399 }
 400
 401 int cxd2820r_init_t(struct dvb_frontend *fe)
 402 {
 403         struct cxd2820r_priv *priv = fe->demodulator_priv;
 404         int ret;
 405
 406         ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
 407         if (ret)
 408                 goto error;
 409
 410         return ret;
 411 error:
 412         dbg("%s: failed:%d", __func__, ret);
 413         return ret;
 414 }
 415
 416 int cxd2820r_sleep_t(struct dvb_frontend *fe)
 417 {
 418         struct cxd2820r_priv *priv = fe->demodulator_priv;
 419         int ret, i;
 420         struct reg_val_mask tab[] = {
 421                 { 0x000ff, 0x1f, 0xff },
 422                 { 0x00085, 0x00, 0xff },
 423                 { 0x00088, 0x01, 0xff },
 424                 { 0x00081, 0x00, 0xff },
 425                 { 0x00080, 0x00, 0xff },
 426         };
 427
 428         dbg("%s", __func__);
 429
 430         priv->delivery_system = SYS_UNDEFINED;
 431
 432         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 433                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 434                         tab[i].mask);
 435                 if (ret)
 436                         goto error;
 437         }
 438
 439         return ret;
 440 error:
 441         dbg("%s: failed:%d", __func__, ret);
 442         return ret;
 443 }
 444
 445 int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
 446         struct dvb_frontend_tune_settings *s)
 447 {
 448         s->min_delay_ms = 500;
 449         s->step_size = fe->ops.info.frequency_stepsize * 2;
 450         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 451
 452         return 0;
 453 }