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 *)®s[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 = ®, 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, ®, 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, ®, 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, ®, 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, ®, 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"); 840