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         struct dvb_frontend_parameters *p)
  26 {
  27         struct cxd2820r_priv *priv = fe->demodulator_priv;
  28         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  29         int ret, i;
  30         u32 if_khz, if_ctl;
  31         u64 num;
  32         u8 buf[3], bw_param;
  33         u8 bw_params1[][5] = {
  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         u8 bw_params2[][2] = {
  39                 { 0x1f, 0xdc }, /* 6 MHz */
  40                 { 0x12, 0xf8 }, /* 7 MHz */
  41                 { 0x01, 0xe0 }, /* 8 MHz */
  42         };
  43         struct reg_val_mask tab[] = {
  44                 { 0x00080, 0x00, 0xff },
  45                 { 0x00081, 0x03, 0xff },
  46                 { 0x00085, 0x07, 0xff },
  47                 { 0x00088, 0x01, 0xff },
  48
  49                 { 0x00070, priv->cfg.ts_mode, 0xff },
  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         dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
  59
  60         /* update GPIOs */
  61         ret = cxd2820r_gpio(fe);
  62         if (ret)
  63                 goto error;
  64
  65         /* program tuner */
  66         if (fe->ops.tuner_ops.set_params)
  67                 fe->ops.tuner_ops.set_params(fe, p);
  68
  69         if (priv->delivery_system != SYS_DVBT) {
  70                 for (i = 0; i < ARRAY_SIZE(tab); i++) {
  71                         ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
  72                                 tab[i].val, tab[i].mask);
  73                         if (ret)
  74                                 goto error;
  75                 }
  76         }
  77
  78         priv->delivery_system = SYS_DVBT;
  79         priv->ber_running = 0; /* tune stops BER counter */
  80
  81         switch (c->bandwidth_hz) {
  82         case 6000000:
  83                 if_khz = priv->cfg.if_dvbt_6;
  84                 i = 0;
  85                 bw_param = 2;
  86                 break;
  87         case 7000000:
  88                 if_khz = priv->cfg.if_dvbt_7;
  89                 i = 1;
  90                 bw_param = 1;
  91                 break;
  92         case 8000000:
  93                 if_khz = priv->cfg.if_dvbt_8;
  94                 i = 2;
  95                 bw_param = 0;
  96                 break;
  97         default:
  98                 return -EINVAL;
  99         }
 100
 101         num = if_khz;
 102         num *= 0x1000000;
 103         if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
 104         buf[0] = ((if_ctl >> 16) & 0xff);
 105         buf[1] = ((if_ctl >>  8) & 0xff);
 106         buf[2] = ((if_ctl >>  0) & 0xff);
 107
 108         ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
 109         if (ret)
 110                 goto error;
 111
 112         ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[i], 5);
 113         if (ret)
 114                 goto error;
 115
 116         ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
 117         if (ret)
 118                 goto error;
 119
 120         ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[i], 2);
 121         if (ret)
 122                 goto error;
 123
 124         ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
 125         if (ret)
 126                 goto error;
 127
 128         ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
 129         if (ret)
 130                 goto error;
 131
 132         return ret;
 133 error:
 134         dbg("%s: failed:%d", __func__, ret);
 135         return ret;
 136 }
 137
 138 int cxd2820r_get_frontend_t(struct dvb_frontend *fe,
 139         struct dvb_frontend_parameters *p)
 140 {
 141         struct cxd2820r_priv *priv = fe->demodulator_priv;
 142         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 143         int ret;
 144         u8 buf[2];
 145
 146         ret = cxd2820r_rd_regs(priv, 0x0002f, buf, sizeof(buf));
 147         if (ret)
 148                 goto error;
 149
 150         switch ((buf[0] >> 6) & 0x03) {
 151         case 0:
 152                 c->modulation = QPSK;
 153                 break;
 154         case 1:
 155                 c->modulation = QAM_16;
 156                 break;
 157         case 2:
 158                 c->modulation = QAM_64;
 159                 break;
 160         }
 161
 162         switch ((buf[1] >> 1) & 0x03) {
 163         case 0:
 164                 c->transmission_mode = TRANSMISSION_MODE_2K;
 165                 break;
 166         case 1:
 167                 c->transmission_mode = TRANSMISSION_MODE_8K;
 168                 break;
 169         }
 170
 171         switch ((buf[1] >> 3) & 0x03) {
 172         case 0:
 173                 c->guard_interval = GUARD_INTERVAL_1_32;
 174                 break;
 175         case 1:
 176                 c->guard_interval = GUARD_INTERVAL_1_16;
 177                 break;
 178         case 2:
 179                 c->guard_interval = GUARD_INTERVAL_1_8;
 180                 break;
 181         case 3:
 182                 c->guard_interval = GUARD_INTERVAL_1_4;
 183                 break;
 184         }
 185
 186         switch ((buf[0] >> 3) & 0x07) {
 187         case 0:
 188                 c->hierarchy = HIERARCHY_NONE;
 189                 break;
 190         case 1:
 191                 c->hierarchy = HIERARCHY_1;
 192                 break;
 193         case 2:
 194                 c->hierarchy = HIERARCHY_2;
 195                 break;
 196         case 3:
 197                 c->hierarchy = HIERARCHY_4;
 198                 break;
 199         }
 200
 201         switch ((buf[0] >> 0) & 0x07) {
 202         case 0:
 203                 c->code_rate_HP = FEC_1_2;
 204                 break;
 205         case 1:
 206                 c->code_rate_HP = FEC_2_3;
 207                 break;
 208         case 2:
 209                 c->code_rate_HP = FEC_3_4;
 210                 break;
 211         case 3:
 212                 c->code_rate_HP = FEC_5_6;
 213                 break;
 214         case 4:
 215                 c->code_rate_HP = FEC_7_8;
 216                 break;
 217         }
 218
 219         switch ((buf[1] >> 5) & 0x07) {
 220         case 0:
 221                 c->code_rate_LP = FEC_1_2;
 222                 break;
 223         case 1:
 224                 c->code_rate_LP = FEC_2_3;
 225                 break;
 226         case 2:
 227                 c->code_rate_LP = FEC_3_4;
 228                 break;
 229         case 3:
 230                 c->code_rate_LP = FEC_5_6;
 231                 break;
 232         case 4:
 233                 c->code_rate_LP = FEC_7_8;
 234                 break;
 235         }
 236
 237         ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
 238         if (ret)
 239                 goto error;
 240
 241         switch ((buf[0] >> 0) & 0x01) {
 242         case 0:
 243                 c->inversion = INVERSION_OFF;
 244                 break;
 245         case 1:
 246                 c->inversion = INVERSION_ON;
 247                 break;
 248         }
 249
 250         return ret;
 251 error:
 252         dbg("%s: failed:%d", __func__, ret);
 253         return ret;
 254 }
 255
 256 int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
 257 {
 258         struct cxd2820r_priv *priv = fe->demodulator_priv;
 259         int ret;
 260         u8 buf[3], start_ber = 0;
 261         *ber = 0;
 262
 263         if (priv->ber_running) {
 264                 ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
 265                 if (ret)
 266                         goto error;
 267
 268                 if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
 269                         *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
 270                         start_ber = 1;
 271                 }
 272         } else {
 273                 priv->ber_running = 1;
 274                 start_ber = 1;
 275         }
 276
 277         if (start_ber) {
 278                 /* (re)start BER */
 279                 ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
 280                 if (ret)
 281                         goto error;
 282         }
 283
 284         return ret;
 285 error:
 286         dbg("%s: failed:%d", __func__, ret);
 287         return ret;
 288 }
 289
 290 int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
 291         u16 *strength)
 292 {
 293         struct cxd2820r_priv *priv = fe->demodulator_priv;
 294         int ret;
 295         u8 buf[2];
 296         u16 tmp;
 297
 298         ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
 299         if (ret)
 300                 goto error;
 301
 302         tmp = (buf[0] & 0x0f) << 8 | buf[1];
 303         tmp = ~tmp & 0x0fff;
 304
 305         /* scale value to 0x0000-0xffff from 0x0000-0x0fff */
 306         *strength = tmp * 0xffff / 0x0fff;
 307
 308         return ret;
 309 error:
 310         dbg("%s: failed:%d", __func__, ret);
 311         return ret;
 312 }
 313
 314 int cxd2820r_read_snr_t(struct dvb_frontend *fe, u16 *snr)
 315 {
 316         struct cxd2820r_priv *priv = fe->demodulator_priv;
 317         int ret;
 318         u8 buf[2];
 319         u16 tmp;
 320         /* report SNR in dB * 10 */
 321
 322         ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
 323         if (ret)
 324                 goto error;
 325
 326         tmp = (buf[0] & 0x1f) << 8 | buf[1];
 327         #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 328         if (tmp)
 329                 *snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
 330                         / 100);
 331         else
 332                 *snr = 0;
 333
 334         dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
 335
 336         return ret;
 337 error:
 338         dbg("%s: failed:%d", __func__, ret);
 339         return ret;
 340 }
 341
 342 int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
 343 {
 344         *ucblocks = 0;
 345         /* no way to read ? */
 346         return 0;
 347 }
 348
 349 int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
 350 {
 351         struct cxd2820r_priv *priv = fe->demodulator_priv;
 352         int ret;
 353         u8 buf[4];
 354         *status = 0;
 355
 356         ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
 357         if (ret)
 358                 goto error;
 359
 360         if ((buf[0] & 0x07) == 6) {
 361                 ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
 362                 if (ret)
 363                         goto error;
 364
 365                 if (((buf[1] >> 3) & 0x01) == 1) {
 366                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 367                                 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 368                 } else {
 369                         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 370                                 FE_HAS_VITERBI | FE_HAS_SYNC;
 371                 }
 372         } else {
 373                 ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
 374                 if (ret)
 375                         goto error;
 376
 377                 if ((buf[2] & 0x0f) >= 4) {
 378                         ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
 379                         if (ret)
 380                                 goto error;
 381
 382                         if (((buf[3] >> 4) & 0x01) == 1)
 383                                 *status |= FE_HAS_SIGNAL;
 384                 }
 385         }
 386
 387         dbg("%s: lock=%02x %02x %02x %02x", __func__,
 388                 buf[0], buf[1], buf[2], buf[3]);
 389
 390         return ret;
 391 error:
 392         dbg("%s: failed:%d", __func__, ret);
 393         return ret;
 394 }
 395
 396 int cxd2820r_init_t(struct dvb_frontend *fe)
 397 {
 398         struct cxd2820r_priv *priv = fe->demodulator_priv;
 399         int ret;
 400
 401         ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
 402         if (ret)
 403                 goto error;
 404
 405         return ret;
 406 error:
 407         dbg("%s: failed:%d", __func__, ret);
 408         return ret;
 409 }
 410
 411 int cxd2820r_sleep_t(struct dvb_frontend *fe)
 412 {
 413         struct cxd2820r_priv *priv = fe->demodulator_priv;
 414         int ret, i;
 415         struct reg_val_mask tab[] = {
 416                 { 0x000ff, 0x1f, 0xff },
 417                 { 0x00085, 0x00, 0xff },
 418                 { 0x00088, 0x01, 0xff },
 419                 { 0x00081, 0x00, 0xff },
 420                 { 0x00080, 0x00, 0xff },
 421         };
 422
 423         dbg("%s", __func__);
 424
 425         priv->delivery_system = SYS_UNDEFINED;
 426
 427         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 428                 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
 429                         tab[i].mask);
 430                 if (ret)
 431                         goto error;
 432         }
 433
 434         return ret;
 435 error:
 436         dbg("%s: failed:%d", __func__, ret);
 437         return ret;
 438 }
 439
 440 int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
 441         struct dvb_frontend_tune_settings *s)
 442 {
 443         s->min_delay_ms = 500;
 444         s->step_size = fe->ops.info.frequency_stepsize * 2;
 445         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 446
 447         return 0;
 448 }
 449