drivers/media/dvb-frontends/tc90522.c

   1 /*
   2  * Toshiba TC90522 Demodulator
   3  *
   4  * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  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
  17 /*
  18  * NOTICE:
  19  * This driver is incomplete and lacks init/config of the chips,
  20  * as the necessary info is not disclosed.
  21  * It assumes that users of this driver (such as a PCI bridge of
  22  * DTV receiver cards) properly init and configure the chip
  23  * via I2C *before* calling this driver's init() function.
  24  *
  25  * Currently, PT3 driver is the only one that uses this driver,
  26  * and contains init/config code in its firmware.
  27  * Thus some part of the code might be dependent on PT3 specific config.
  28  */
  29
  30 #include <linux/kernel.h>
  31 #include <linux/math64.h>
  32 #include <linux/dvb/frontend.h>
  33 #include "dvb_math.h"
  34 #include "tc90522.h"
  35
  36 #define TC90522_I2C_THRU_REG 0xfe
  37
  38 #define TC90522_MODULE_IDX(addr) (((u8)(addr) & 0x02U) >> 1)
  39
  40 struct tc90522_state {
  41         struct tc90522_config cfg;
  42         struct dvb_frontend fe;
  43         struct i2c_client *i2c_client;
  44         struct i2c_adapter tuner_i2c;
  45
  46         bool lna;
  47 };
  48
  49 struct reg_val {
  50         u8 reg;
  51         u8 val;
  52 };
  53
  54 static int
  55 reg_write(struct tc90522_state *state, const struct reg_val *regs, int num)
  56 {
  57         int i, ret;
  58         struct i2c_msg msg;
  59
  60         ret = 0;
  61         msg.addr = state->i2c_client->addr;
  62         msg.flags = 0;
  63         msg.len = 2;
  64         for (i = 0; i < num; i++) {
  65                 msg.buf = (u8 *)&regs[i];
  66                 ret = i2c_transfer(state->i2c_client->adapter, &msg, 1);
  67                 if (ret == 0)
  68                         ret = -EIO;
  69                 if (ret < 0)
  70                         return ret;
  71         }
  72         return 0;
  73 }
  74
  75 static int reg_read(struct tc90522_state *state, u8 reg, u8 *val, u8 len)
  76 {
  77         struct i2c_msg msgs[2] = {
  78                 {
  79                         .addr = state->i2c_client->addr,
  80                         .flags = 0,
  81                         .buf = &reg,
  82                         .len = 1,
  83                 },
  84                 {
  85                         .addr = state->i2c_client->addr,
  86                         .flags = I2C_M_RD,
  87                         .buf = val,
  88                         .len = len,
  89                 },
  90         };
  91         int ret;
  92
  93         ret = i2c_transfer(state->i2c_client->adapter, msgs, ARRAY_SIZE(msgs));
  94         if (ret == ARRAY_SIZE(msgs))
  95                 ret = 0;
  96         else if (ret >= 0)
  97                 ret = -EIO;
  98         return ret;
  99 }
 100
 101 static struct tc90522_state *cfg_to_state(struct tc90522_config *c)
 102 {
 103         return container_of(c, struct tc90522_state, cfg);
 104 }
 105
 106
 107 static int tc90522s_set_tsid(struct dvb_frontend *fe)
 108 {
 109         struct reg_val set_tsid[] = {
 110                 { 0x8f, 00 },
 111                 { 0x90, 00 }
 112         };
 113
 114         set_tsid[0].val = (fe->dtv_property_cache.stream_id & 0xff00) >> 8;
 115         set_tsid[1].val = fe->dtv_property_cache.stream_id & 0xff;
 116         return reg_write(fe->demodulator_priv, set_tsid, ARRAY_SIZE(set_tsid));
 117 }
 118
 119 static int tc90522t_set_layers(struct dvb_frontend *fe)
 120 {
 121         struct reg_val rv;
 122         u8 laysel;
 123
 124         laysel = ~fe->dtv_property_cache.isdbt_layer_enabled & 0x07;
 125         laysel = (laysel & 0x01) << 2 | (laysel & 0x02) | (laysel & 0x04) >> 2;
 126         rv.reg = 0x71;
 127         rv.val = laysel;
 128         return reg_write(fe->demodulator_priv, &rv, 1);
 129 }
 130
 131 /* frontend ops */
 132
 133 static int tc90522s_read_status(struct dvb_frontend *fe, enum fe_status *status)
 134 {
 135         struct tc90522_state *state;
 136         int ret;
 137         u8 reg;
 138
 139         state = fe->demodulator_priv;
 140         ret = reg_read(state, 0xc3, &reg, 1);
 141         if (ret < 0)
 142                 return ret;
 143
 144         *status = 0;
 145         if (reg & 0x80) /* input level under min ? */
 146                 return 0;
 147         *status |= FE_HAS_SIGNAL;
 148
 149         if (reg & 0x60) /* carrier? */
 150                 return 0;
 151         *status |= FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC;
 152
 153         if (reg & 0x10)
 154                 return 0;
 155         if (reg_read(state, 0xc5, &reg, 1) < 0 || !(reg & 0x03))
 156                 return 0;
 157         *status |= FE_HAS_LOCK;
 158         return 0;
 159 }
 160
 161 static int tc90522t_read_status(struct dvb_frontend *fe, enum fe_status *status)
 162 {
 163         struct tc90522_state *state;
 164         int ret;
 165         u8 reg;
 166
 167         state = fe->demodulator_priv;
 168         ret = reg_read(state, 0x96, &reg, 1);
 169         if (ret < 0)
 170                 return ret;
 171
 172         *status = 0;
 173         if (reg & 0xe0) {
 174                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI
 175                                 | FE_HAS_SYNC | FE_HAS_LOCK;
 176                 return 0;
 177         }
 178
 179         ret = reg_read(state, 0x80, &reg, 1);
 180         if (ret < 0)
 181                 return ret;
 182
 183         if (reg & 0xf0)
 184                 return 0;
 185         *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
 186
 187         if (reg & 0x0c)
 188                 return 0;
 189         *status |= FE_HAS_SYNC | FE_HAS_VITERBI;
 190
 191         if (reg & 0x02)
 192                 return 0;
 193         *status |= FE_HAS_LOCK;
 194         return 0;
 195 }
 196
 197 static const enum fe_code_rate fec_conv_sat[] = {
 198         FEC_NONE, /* unused */
 199         FEC_1_2, /* for BPSK */
 200         FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, /* for QPSK */
 201         FEC_2_3, /* for 8PSK. (trellis code) */
 202 };
 203
 204 static int tc90522s_get_frontend(struct dvb_frontend *fe,
 205                                  struct dtv_frontend_properties *c)
 206 {
 207         struct tc90522_state *state;
 208         struct dtv_fe_stats *stats;
 209         int ret, i;
 210         int layers;
 211         u8 val[10];
 212         u32 cndat;
 213
 214         state = fe->demodulator_priv;
 215         c->delivery_system = SYS_ISDBS;
 216         c->symbol_rate = 28860000;
 217
 218         layers = 0;
 219         ret = reg_read(state, 0xe6, val, 5);
 220         if (ret == 0) {
 221                 u8 v;
 222
 223                 c->stream_id = val[0] << 8 | val[1];
 224
 225                 /* high/single layer */
 226                 v = (val[2] & 0x70) >> 4;
 227                 c->modulation = (v == 7) ? PSK_8 : QPSK;
 228                 c->fec_inner = fec_conv_sat[v];
 229                 c->layer[0].fec = c->fec_inner;
 230                 c->layer[0].modulation = c->modulation;
 231                 c->layer[0].segment_count = val[3] & 0x3f; /* slots */
 232
 233                 /* low layer */
 234                 v = (val[2] & 0x07);
 235                 c->layer[1].fec = fec_conv_sat[v];
 236                 if (v == 0)  /* no low layer */
 237                         c->layer[1].segment_count = 0;
 238                 else
 239                         c->layer[1].segment_count = val[4] & 0x3f; /* slots */
 240                 /*
 241                  * actually, BPSK if v==1, but not defined in
 242                  * enum fe_modulation
 243                  */
 244                 c->layer[1].modulation = QPSK;
 245                 layers = (v > 0) ? 2 : 1;
 246         }
 247
 248         /* statistics */
 249
 250         stats = &c->strength;
 251         stats->len = 0;
 252         /* let the connected tuner set RSSI property cache */
 253         if (fe->ops.tuner_ops.get_rf_strength) {
 254                 u16 dummy;
 255
 256                 fe->ops.tuner_ops.get_rf_strength(fe, &dummy);
 257         }
 258
 259         stats = &c->cnr;
 260         stats->len = 1;
 261         stats->stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 262         cndat = 0;
 263         ret = reg_read(state, 0xbc, val, 2);
 264         if (ret == 0)
 265                 cndat = val[0] << 8 | val[1];
 266         if (cndat >= 3000) {
 267                 u32 p, p4;
 268                 s64 cn;
 269
 270                 cndat -= 3000;  /* cndat: 4.12 fixed point float */
 271                 /*
 272                  * cnr[mdB] = -1634.6 * P^5 + 14341 * P^4 - 50259 * P^3
 273                  *                 + 88977 * P^2 - 89565 * P + 58857
 274                  *  (P = sqrt(cndat) / 64)
 275                  */
 276                 /* p := sqrt(cndat) << 8 = P << 14, 2.14 fixed  point float */
 277                 /* cn = cnr << 3 */
 278                 p = int_sqrt(cndat << 16);
 279                 p4 = cndat * cndat;
 280                 cn = div64_s64(-16346LL * p4 * p, 10) >> 35;
 281                 cn += (14341LL * p4) >> 21;
 282                 cn -= (50259LL * cndat * p) >> 23;
 283                 cn += (88977LL * cndat) >> 9;
 284                 cn -= (89565LL * p) >> 11;
 285                 cn += 58857  << 3;
 286                 stats->stat[0].svalue = cn >> 3;
 287                 stats->stat[0].scale = FE_SCALE_DECIBEL;
 288         }
 289
 290         /* per-layer post viterbi BER (or PER? config dependent?) */
 291         stats = &c->post_bit_error;
 292         memset(stats, 0, sizeof(*stats));
 293         stats->len = layers;
 294         ret = reg_read(state, 0xeb, val, 10);
 295         if (ret < 0)
 296                 for (i = 0; i < layers; i++)
 297                         stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
 298         else {
 299                 for (i = 0; i < layers; i++) {
 300                         stats->stat[i].scale = FE_SCALE_COUNTER;
 301                         stats->stat[i].uvalue = val[i * 5] << 16
 302                                 | val[i * 5 + 1] << 8 | val[i * 5 + 2];
 303                 }
 304         }
 305         stats = &c->post_bit_count;
 306         memset(stats, 0, sizeof(*stats));
 307         stats->len = layers;
 308         if (ret < 0)
 309                 for (i = 0; i < layers; i++)
 310                         stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
 311         else {
 312                 for (i = 0; i < layers; i++) {
 313                         stats->stat[i].scale = FE_SCALE_COUNTER;
 314                         stats->stat[i].uvalue =
 315                                 val[i * 5 + 3] << 8 | val[i * 5 + 4];
 316                         stats->stat[i].uvalue *= 204 * 8;
 317                 }
 318         }
 319
 320         return 0;
 321 }
 322
 323
 324 static const enum fe_transmit_mode tm_conv[] = {
 325         TRANSMISSION_MODE_2K,
 326         TRANSMISSION_MODE_4K,
 327         TRANSMISSION_MODE_8K,
 328         0
 329 };
 330
 331 static const enum fe_code_rate fec_conv_ter[] = {
 332         FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, 0, 0, 0
 333 };
 334
 335 static const enum fe_modulation mod_conv[] = {
 336         DQPSK, QPSK, QAM_16, QAM_64, 0, 0, 0, 0
 337 };
 338
 339 static int tc90522t_get_frontend(struct dvb_frontend *fe,
 340                                  struct dtv_frontend_properties *c)
 341 {
 342         struct tc90522_state *state;
 343         struct dtv_fe_stats *stats;
 344         int ret, i;
 345         int layers;
 346         u8 val[15], mode;
 347         u32 cndat;
 348
 349         state = fe->demodulator_priv;
 350         c->delivery_system = SYS_ISDBT;
 351         c->bandwidth_hz = 6000000;
 352         mode = 1;
 353         ret = reg_read(state, 0xb0, val, 1);
 354         if (ret == 0) {
 355                 mode = (val[0] & 0xc0) >> 2;
 356                 c->transmission_mode = tm_conv[mode];
 357                 c->guard_interval = (val[0] & 0x30) >> 4;
 358         }
 359
 360         ret = reg_read(state, 0xb2, val, 6);
 361         layers = 0;
 362         if (ret == 0) {
 363                 u8 v;
 364
 365                 c->isdbt_partial_reception = val[0] & 0x01;
 366                 c->isdbt_sb_mode = (val[0] & 0xc0) == 0x40;
 367
 368                 /* layer A */
 369                 v = (val[2] & 0x78) >> 3;
 370                 if (v == 0x0f)
 371                         c->layer[0].segment_count = 0;
 372                 else {
 373                         layers++;
 374                         c->layer[0].segment_count = v;
 375                         c->layer[0].fec = fec_conv_ter[(val[1] & 0x1c) >> 2];
 376                         c->layer[0].modulation = mod_conv[(val[1] & 0xe0) >> 5];
 377                         v = (val[1] & 0x03) << 1 | (val[2] & 0x80) >> 7;
 378                         c->layer[0].interleaving = v;
 379                 }
 380
 381                 /* layer B */
 382                 v = (val[3] & 0x03) << 1 | (val[4] & 0xc0) >> 6;
 383                 if (v == 0x0f)
 384                         c->layer[1].segment_count = 0;
 385                 else {
 386                         layers++;
 387                         c->layer[1].segment_count = v;
 388                         c->layer[1].fec = fec_conv_ter[(val[3] & 0xe0) >> 5];
 389                         c->layer[1].modulation = mod_conv[(val[2] & 0x07)];
 390                         c->layer[1].interleaving = (val[3] & 0x1c) >> 2;
 391                 }
 392
 393                 /* layer C */
 394                 v = (val[5] & 0x1e) >> 1;
 395                 if (v == 0x0f)
 396                         c->layer[2].segment_count = 0;
 397                 else {
 398                         layers++;
 399                         c->layer[2].segment_count = v;
 400                         c->layer[2].fec = fec_conv_ter[(val[4] & 0x07)];
 401                         c->layer[2].modulation = mod_conv[(val[4] & 0x38) >> 3];
 402                         c->layer[2].interleaving = (val[5] & 0xe0) >> 5;
 403                 }
 404         }
 405
 406         /* statistics */
 407
 408         stats = &c->strength;
 409         stats->len = 0;
 410         /* let the connected tuner set RSSI property cache */
 411         if (fe->ops.tuner_ops.get_rf_strength) {
 412                 u16 dummy;
 413
 414                 fe->ops.tuner_ops.get_rf_strength(fe, &dummy);
 415         }
 416
 417         stats = &c->cnr;
 418         stats->len = 1;
 419         stats->stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 420         cndat = 0;
 421         ret = reg_read(state, 0x8b, val, 3);
 422         if (ret == 0)
 423                 cndat = val[0] << 16 | val[1] << 8 | val[2];
 424         if (cndat != 0) {
 425                 u32 p, tmp;
 426                 s64 cn;
 427
 428                 /*
 429                  * cnr[mdB] = 0.024 P^4 - 1.6 P^3 + 39.8 P^2 + 549.1 P + 3096.5
 430                  * (P = 10log10(5505024/cndat))
 431                  */
 432                 /* cn = cnr << 3 (61.3 fixed point float */
 433                 /* p = 10log10(5505024/cndat) << 24  (8.24 fixed point float)*/
 434                 p = intlog10(5505024) - intlog10(cndat);
 435                 p *= 10;
 436
 437                 cn = 24772;
 438                 cn += div64_s64(43827LL * p, 10) >> 24;
 439                 tmp = p >> 8;
 440                 cn += div64_s64(3184LL * tmp * tmp, 10) >> 32;
 441                 tmp = p >> 13;
 442                 cn -= div64_s64(128LL * tmp * tmp * tmp, 10) >> 33;
 443                 tmp = p >> 18;
 444                 cn += div64_s64(192LL * tmp * tmp * tmp * tmp, 1000) >> 24;
 445
 446                 stats->stat[0].svalue = cn >> 3;
 447                 stats->stat[0].scale = FE_SCALE_DECIBEL;
 448         }
 449
 450         /* per-layer post viterbi BER (or PER? config dependent?) */
 451         stats = &c->post_bit_error;
 452         memset(stats, 0, sizeof(*stats));
 453         stats->len = layers;
 454         ret = reg_read(state, 0x9d, val, 15);
 455         if (ret < 0)
 456                 for (i = 0; i < layers; i++)
 457                         stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
 458         else {
 459                 for (i = 0; i < layers; i++) {
 460                         stats->stat[i].scale = FE_SCALE_COUNTER;
 461                         stats->stat[i].uvalue = val[i * 3] << 16
 462                                 | val[i * 3 + 1] << 8 | val[i * 3 + 2];
 463                 }
 464         }
 465         stats = &c->post_bit_count;
 466         memset(stats, 0, sizeof(*stats));
 467         stats->len = layers;
 468         if (ret < 0)
 469                 for (i = 0; i < layers; i++)
 470                         stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
 471         else {
 472                 for (i = 0; i < layers; i++) {
 473                         stats->stat[i].scale = FE_SCALE_COUNTER;
 474                         stats->stat[i].uvalue =
 475                                 val[9 + i * 2] << 8 | val[9 + i * 2 + 1];
 476                         stats->stat[i].uvalue *= 204 * 8;
 477                 }
 478         }
 479
 480         return 0;
 481 }
 482
 483 static const struct reg_val reset_sat = { 0x03, 0x01 };
 484 static const struct reg_val reset_ter = { 0x01, 0x40 };
 485
 486 static int tc90522_set_frontend(struct dvb_frontend *fe)
 487 {
 488         struct tc90522_state *state;
 489         int ret;
 490
 491         state = fe->demodulator_priv;
 492
 493         if (fe->ops.tuner_ops.set_params)
 494                 ret = fe->ops.tuner_ops.set_params(fe);
 495         else
 496                 ret = -ENODEV;
 497         if (ret < 0)
 498                 goto failed;
 499
 500         if (fe->ops.delsys[0] == SYS_ISDBS) {
 501                 ret = tc90522s_set_tsid(fe);
 502                 if (ret < 0)
 503                         goto failed;
 504                 ret = reg_write(state, &reset_sat, 1);
 505         } else {
 506                 ret = tc90522t_set_layers(fe);
 507                 if (ret < 0)
 508                         goto failed;
 509                 ret = reg_write(state, &reset_ter, 1);
 510         }
 511         if (ret < 0)
 512                 goto failed;
 513
 514         return 0;
 515
 516 failed:
 517         dev_warn(&state->tuner_i2c.dev, "(%s) failed. [adap%d-fe%d]\n",
 518                         __func__, fe->dvb->num, fe->id);
 519         return ret;
 520 }
 521
 522 static int tc90522_get_tune_settings(struct dvb_frontend *fe,
 523         struct dvb_frontend_tune_settings *settings)
 524 {
 525         if (fe->ops.delsys[0] == SYS_ISDBS) {
 526                 settings->min_delay_ms = 250;
 527                 settings->step_size = 1000;
 528                 settings->max_drift = settings->step_size * 2;
 529         } else {
 530                 settings->min_delay_ms = 400;
 531                 settings->step_size = 142857;
 532                 settings->max_drift = settings->step_size;
 533         }
 534         return 0;
 535 }
 536
 537 static int tc90522_set_if_agc(struct dvb_frontend *fe, bool on)
 538 {
 539         struct reg_val agc_sat[] = {
 540                 { 0x0a, 0x00 },
 541                 { 0x10, 0x30 },
 542                 { 0x11, 0x00 },
 543                 { 0x03, 0x01 },
 544         };
 545         struct reg_val agc_ter[] = {
 546                 { 0x25, 0x00 },
 547                 { 0x23, 0x4c },
 548                 { 0x01, 0x40 },
 549         };
 550         struct tc90522_state *state;
 551         struct reg_val *rv;
 552         int num;
 553
 554         state = fe->demodulator_priv;
 555         if (fe->ops.delsys[0] == SYS_ISDBS) {
 556                 agc_sat[0].val = on ? 0xff : 0x00;
 557                 agc_sat[1].val |= 0x80;
 558                 agc_sat[1].val |= on ? 0x01 : 0x00;
 559                 agc_sat[2].val |= on ? 0x40 : 0x00;
 560                 rv = agc_sat;
 561                 num = ARRAY_SIZE(agc_sat);
 562         } else {
 563                 agc_ter[0].val = on ? 0x40 : 0x00;
 564                 agc_ter[1].val |= on ? 0x00 : 0x01;
 565                 rv = agc_ter;
 566                 num = ARRAY_SIZE(agc_ter);
 567         }
 568         return reg_write(state, rv, num);
 569 }
 570
 571 static const struct reg_val sleep_sat = { 0x17, 0x01 };
 572 static const struct reg_val sleep_ter = { 0x03, 0x90 };
 573
 574 static int tc90522_sleep(struct dvb_frontend *fe)
 575 {
 576         struct tc90522_state *state;
 577         int ret;
 578
 579         state = fe->demodulator_priv;
 580         if (fe->ops.delsys[0] == SYS_ISDBS)
 581                 ret = reg_write(state, &sleep_sat, 1);
 582         else {
 583                 ret = reg_write(state, &sleep_ter, 1);
 584                 if (ret == 0 && fe->ops.set_lna &&
 585                     fe->dtv_property_cache.lna == LNA_AUTO) {
 586                         fe->dtv_property_cache.lna = 0;
 587                         ret = fe->ops.set_lna(fe);
 588                         fe->dtv_property_cache.lna = LNA_AUTO;
 589                 }
 590         }
 591         if (ret < 0)
 592                 dev_warn(&state->tuner_i2c.dev,
 593                         "(%s) failed. [adap%d-fe%d]\n",
 594                         __func__, fe->dvb->num, fe->id);
 595         return ret;
 596 }
 597
 598 static const struct reg_val wakeup_sat = { 0x17, 0x00 };
 599 static const struct reg_val wakeup_ter = { 0x03, 0x80 };
 600
 601 static int tc90522_init(struct dvb_frontend *fe)
 602 {
 603         struct tc90522_state *state;
 604         int ret;
 605
 606         /*
 607          * Because the init sequence is not public,
 608          * the parent device/driver should have init'ed the device before.
 609          * just wake up the device here.
 610          */
 611
 612         state = fe->demodulator_priv;
 613         if (fe->ops.delsys[0] == SYS_ISDBS)
 614                 ret = reg_write(state, &wakeup_sat, 1);
 615         else {
 616                 ret = reg_write(state, &wakeup_ter, 1);
 617                 if (ret == 0 && fe->ops.set_lna &&
 618                     fe->dtv_property_cache.lna == LNA_AUTO) {
 619                         fe->dtv_property_cache.lna = 1;
 620                         ret = fe->ops.set_lna(fe);
 621                         fe->dtv_property_cache.lna = LNA_AUTO;
 622                 }
 623         }
 624         if (ret < 0) {
 625                 dev_warn(&state->tuner_i2c.dev,
 626                         "(%s) failed. [adap%d-fe%d]\n",
 627                         __func__, fe->dvb->num, fe->id);
 628                 return ret;
 629         }
 630
 631         /* prefer 'all-layers' to 'none' as a default */
 632         if (fe->dtv_property_cache.isdbt_layer_enabled == 0)
 633                 fe->dtv_property_cache.isdbt_layer_enabled = 7;
 634         return tc90522_set_if_agc(fe, true);
 635 }
 636
 637
 638 /*
 639  * tuner I2C adapter functions
 640  */
 641
 642 static int
 643 tc90522_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 644 {
 645         struct tc90522_state *state;
 646         struct i2c_msg *new_msgs;
 647         int i, j;
 648         int ret, rd_num;
 649         u8 wbuf[256];
 650         u8 *p, *bufend;
 651
 652         if (num <= 0)
 653                 return -EINVAL;
 654
 655         rd_num = 0;
 656         for (i = 0; i < num; i++)
 657                 if (msgs[i].flags & I2C_M_RD)
 658                         rd_num++;
 659         new_msgs = kmalloc_array(num + rd_num, sizeof(*new_msgs), GFP_KERNEL);
 660         if (!new_msgs)
 661                 return -ENOMEM;
 662
 663         state = i2c_get_adapdata(adap);
 664         p = wbuf;
 665         bufend = wbuf + sizeof(wbuf);
 666         for (i = 0, j = 0; i < num; i++, j++) {
 667                 new_msgs[j].addr = state->i2c_client->addr;
 668                 new_msgs[j].flags = msgs[i].flags;
 669
 670                 if (msgs[i].flags & I2C_M_RD) {
 671                         new_msgs[j].flags &= ~I2C_M_RD;
 672                         if (p + 2 > bufend)
 673                                 break;
 674                         p[0] = TC90522_I2C_THRU_REG;
 675                         p[1] = msgs[i].addr << 1 | 0x01;
 676                         new_msgs[j].buf = p;
 677                         new_msgs[j].len = 2;
 678                         p += 2;
 679                         j++;
 680                         new_msgs[j].addr = state->i2c_client->addr;
 681                         new_msgs[j].flags = msgs[i].flags;
 682                         new_msgs[j].buf = msgs[i].buf;
 683                         new_msgs[j].len = msgs[i].len;
 684                         continue;
 685                 }
 686
 687                 if (p + msgs[i].len + 2 > bufend)
 688                         break;
 689                 p[0] = TC90522_I2C_THRU_REG;
 690                 p[1] = msgs[i].addr << 1;
 691                 memcpy(p + 2, msgs[i].buf, msgs[i].len);
 692                 new_msgs[j].buf = p;
 693                 new_msgs[j].len = msgs[i].len + 2;
 694                 p += new_msgs[j].len;
 695         }
 696
 697         if (i < num)
 698                 ret = -ENOMEM;
 699         else
 700                 ret = i2c_transfer(state->i2c_client->adapter, new_msgs, j);
 701         if (ret >= 0 && ret < j)
 702                 ret = -EIO;
 703         kfree(new_msgs);
 704         return (ret == j) ? num : ret;
 705 }
 706
 707 static u32 tc90522_functionality(struct i2c_adapter *adap)
 708 {
 709         return I2C_FUNC_I2C;
 710 }
 711
 712 static const struct i2c_algorithm tc90522_tuner_i2c_algo = {
 713         .master_xfer   = &tc90522_master_xfer,
 714         .functionality = &tc90522_functionality,
 715 };
 716
 717
 718 /*
 719  * I2C driver functions
 720  */
 721
 722 static const struct dvb_frontend_ops tc90522_ops_sat = {
 723         .delsys = { SYS_ISDBS },
 724         .info = {
 725                 .name = "Toshiba TC90522 ISDB-S module",
 726                 .frequency_min =  950000,
 727                 .frequency_max = 2150000,
 728                 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
 729                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 730                         FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
 731         },
 732
 733         .init = tc90522_init,
 734         .sleep = tc90522_sleep,
 735         .set_frontend = tc90522_set_frontend,
 736         .get_tune_settings = tc90522_get_tune_settings,
 737
 738         .get_frontend = tc90522s_get_frontend,
 739         .read_status = tc90522s_read_status,
 740 };
 741
 742 static const struct dvb_frontend_ops tc90522_ops_ter = {
 743         .delsys = { SYS_ISDBT },
 744         .info = {
 745                 .name = "Toshiba TC90522 ISDB-T module",
 746                 .frequency_min = 470000000,
 747                 .frequency_max = 770000000,
 748                 .frequency_stepsize = 142857,
 749                 .caps = FE_CAN_INVERSION_AUTO |
 750                         FE_CAN_FEC_1_2  | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 751                         FE_CAN_FEC_5_6  | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 752                         FE_CAN_QPSK     | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 753                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 754                         FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
 755                         FE_CAN_HIERARCHY_AUTO,
 756         },
 757
 758         .init = tc90522_init,
 759         .sleep = tc90522_sleep,
 760         .set_frontend = tc90522_set_frontend,
 761         .get_tune_settings = tc90522_get_tune_settings,
 762
 763         .get_frontend = tc90522t_get_frontend,
 764         .read_status = tc90522t_read_status,
 765 };
 766
 767
 768 static int tc90522_probe(struct i2c_client *client,
 769                          const struct i2c_device_id *id)
 770 {
 771         struct tc90522_state *state;
 772         struct tc90522_config *cfg;
 773         const struct dvb_frontend_ops *ops;
 774         struct i2c_adapter *adap;
 775         int ret;
 776
 777         state = kzalloc(sizeof(*state), GFP_KERNEL);
 778         if (!state)
 779                 return -ENOMEM;
 780         state->i2c_client = client;
 781
 782         cfg = client->dev.platform_data;
 783         memcpy(&state->cfg, cfg, sizeof(state->cfg));
 784         cfg->fe = state->cfg.fe = &state->fe;
 785         ops =  id->driver_data == 0 ? &tc90522_ops_sat : &tc90522_ops_ter;
 786         memcpy(&state->fe.ops, ops, sizeof(*ops));
 787         state->fe.demodulator_priv = state;
 788
 789         adap = &state->tuner_i2c;
 790         adap->owner = THIS_MODULE;
 791         adap->algo = &tc90522_tuner_i2c_algo;
 792         adap->dev.parent = &client->dev;
 793         strlcpy(adap->name, "tc90522_sub", sizeof(adap->name));
 794         i2c_set_adapdata(adap, state);
 795         ret = i2c_add_adapter(adap);
 796         if (ret < 0)
 797                 goto free_state;
 798         cfg->tuner_i2c = state->cfg.tuner_i2c = adap;
 799
 800         i2c_set_clientdata(client, &state->cfg);
 801         dev_info(&client->dev, "Toshiba TC90522 attached.\n");
 802         return 0;
 803 free_state:
 804         kfree(state);
 805         return ret;
 806 }
 807
 808 static int tc90522_remove(struct i2c_client *client)
 809 {
 810         struct tc90522_state *state;
 811
 812         state = cfg_to_state(i2c_get_clientdata(client));
 813         i2c_del_adapter(&state->tuner_i2c);
 814         kfree(state);
 815         return 0;
 816 }
 817
 818
 819 static const struct i2c_device_id tc90522_id[] = {
 820         { TC90522_I2C_DEV_SAT, 0 },
 821         { TC90522_I2C_DEV_TER, 1 },
 822         {}
 823 };
 824 MODULE_DEVICE_TABLE(i2c, tc90522_id);
 825
 826 static struct i2c_driver tc90522_driver = {
 827         .driver = {
 828                 .name   = "tc90522",
 829         },
 830         .probe          = tc90522_probe,
 831         .remove         = tc90522_remove,
 832         .id_table       = tc90522_id,
 833 };
 834
 835 module_i2c_driver(tc90522_driver);
 836
 837 MODULE_DESCRIPTION("Toshiba TC90522 frontend");
 838 MODULE_AUTHOR("Akihiro TSUKADA");
 839 MODULE_LICENSE("GPL");