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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 | // SPDX-License-Identifier: GPL-2.0-or-later /* Driver for Philips tda10086 DVBS Demodulator (c) 2006 Andrew de Quincey */ #include <linux/init.h> #include <linux/module.h> #include <linux/device.h> #include <linux/jiffies.h> #include <linux/string.h> #include <linux/slab.h> #include <media/dvb_frontend.h> #include "tda10086.h" #define SACLK 96000000U struct tda10086_state { struct i2c_adapter* i2c; const struct tda10086_config* config; struct dvb_frontend frontend; /* private demod data */ u32 frequency; u32 symbol_rate; bool has_lock; }; static int debug; #define dprintk(args...) \ do { \ if (debug) printk(KERN_DEBUG "tda10086: " args); \ } while (0) static int tda10086_write_byte(struct tda10086_state *state, int reg, int data) { int ret; u8 b0[] = { reg, data }; struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 }; msg.addr = state->config->demod_address; ret = i2c_transfer(state->i2c, &msg, 1); if (ret != 1) dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n", __func__, reg, data, ret); return (ret != 1) ? ret : 0; } static int tda10086_read_byte(struct tda10086_state *state, int reg) { int ret; u8 b0[] = { reg }; u8 b1[] = { 0 }; struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 }, { .flags = I2C_M_RD, .buf = b1, .len = 1 }}; msg[0].addr = state->config->demod_address; msg[1].addr = state->config->demod_address; ret = i2c_transfer(state->i2c, msg, 2); if (ret != 2) { dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret); return ret; } return b1[0]; } static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data) { int val; /* read a byte and check */ val = tda10086_read_byte(state, reg); if (val < 0) return val; /* mask if off */ val = val & ~mask; val |= data & 0xff; /* write it out again */ return tda10086_write_byte(state, reg, val); } static int tda10086_init(struct dvb_frontend* fe) { struct tda10086_state* state = fe->demodulator_priv; u8 t22k_off = 0x80; dprintk ("%s\n", __func__); if (state->config->diseqc_tone) t22k_off = 0; /* reset */ tda10086_write_byte(state, 0x00, 0x00); msleep(10); /* misc setup */ tda10086_write_byte(state, 0x01, 0x94); tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */ tda10086_write_byte(state, 0x03, 0xe4); tda10086_write_byte(state, 0x04, 0x43); tda10086_write_byte(state, 0x0c, 0x0c); tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */ tda10086_write_byte(state, 0x20, 0x89); /* misc */ tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */ tda10086_write_byte(state, 0x32, 0x00); /* irq off */ tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */ /* setup PLL (this assumes SACLK = 96MHz) */ tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */ if (state->config->xtal_freq == TDA10086_XTAL_16M) { tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */ tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */ } else { tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */ tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */ } tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */ /* setup TS interface */ tda10086_write_byte(state, 0x11, 0x81); tda10086_write_byte(state, 0x12, 0x81); tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */ tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */ tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */ tda10086_write_byte(state, 0x10, 0x2a); /* setup ADC */ tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */ tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */ /* setup AGC */ tda10086_write_byte(state, 0x05, 0x0B); tda10086_write_byte(state, 0x37, 0x63); tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */ tda10086_write_byte(state, 0x40, 0x64); tda10086_write_byte(state, 0x41, 0x4f); tda10086_write_byte(state, 0x42, 0x43); /* setup viterbi */ tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */ /* setup carrier recovery */ tda10086_write_byte(state, 0x3d, 0x80); /* setup SEC */ tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */ tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000))); tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8); return 0; } static void tda10086_diseqc_wait(struct tda10086_state *state) { unsigned long timeout = jiffies + msecs_to_jiffies(200); while (!(tda10086_read_byte(state, 0x50) & 0x01)) { if(time_after(jiffies, timeout)) { printk("%s: diseqc queue not ready, command may be lost.\n", __func__); break; } msleep(10); } } static int tda10086_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone) { struct tda10086_state* state = fe->demodulator_priv; u8 t22k_off = 0x80; dprintk ("%s\n", __func__); if (state->config->diseqc_tone) t22k_off = 0; switch (tone) { case SEC_TONE_OFF: tda10086_write_byte(state, 0x36, t22k_off); break; case SEC_TONE_ON: tda10086_write_byte(state, 0x36, 0x01 + t22k_off); break; } return 0; } static int tda10086_send_master_cmd (struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd) { struct tda10086_state* state = fe->demodulator_priv; int i; u8 oldval; u8 t22k_off = 0x80; dprintk ("%s\n", __func__); if (state->config->diseqc_tone) t22k_off = 0; if (cmd->msg_len > 6) return -EINVAL; oldval = tda10086_read_byte(state, 0x36); for(i=0; i< cmd->msg_len; i++) { tda10086_write_byte(state, 0x48+i, cmd->msg[i]); } tda10086_write_byte(state, 0x36, (0x08 + t22k_off) | ((cmd->msg_len - 1) << 4)); tda10086_diseqc_wait(state); tda10086_write_byte(state, 0x36, oldval); return 0; } static int tda10086_send_burst(struct dvb_frontend *fe, enum fe_sec_mini_cmd minicmd) { struct tda10086_state* state = fe->demodulator_priv; u8 oldval = tda10086_read_byte(state, 0x36); u8 t22k_off = 0x80; dprintk ("%s\n", __func__); if (state->config->diseqc_tone) t22k_off = 0; switch(minicmd) { case SEC_MINI_A: tda10086_write_byte(state, 0x36, 0x04 + t22k_off); break; case SEC_MINI_B: tda10086_write_byte(state, 0x36, 0x06 + t22k_off); break; } tda10086_diseqc_wait(state); tda10086_write_byte(state, 0x36, oldval); return 0; } static int tda10086_set_inversion(struct tda10086_state *state, struct dtv_frontend_properties *fe_params) { u8 invval = 0x80; dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert); switch(fe_params->inversion) { case INVERSION_OFF: if (state->config->invert) invval = 0x40; break; case INVERSION_ON: if (!state->config->invert) invval = 0x40; break; case INVERSION_AUTO: invval = 0x00; break; } tda10086_write_mask(state, 0x0c, 0xc0, invval); return 0; } static int tda10086_set_symbol_rate(struct tda10086_state *state, struct dtv_frontend_properties *fe_params) { u8 dfn = 0; u8 afs = 0; u8 byp = 0; u8 reg37 = 0x43; u8 reg42 = 0x43; u64 big; u32 tmp; u32 bdr; u32 bdri; u32 symbol_rate = fe_params->symbol_rate; dprintk ("%s %i\n", __func__, symbol_rate); /* setup the decimation and anti-aliasing filters.. */ if (symbol_rate < SACLK / 10000 * 137) { dfn=4; afs=1; } else if (symbol_rate < SACLK / 10000 * 208) { dfn=4; afs=0; } else if (symbol_rate < SACLK / 10000 * 270) { dfn=3; afs=1; } else if (symbol_rate < SACLK / 10000 * 416) { dfn=3; afs=0; } else if (symbol_rate < SACLK / 10000 * 550) { dfn=2; afs=1; } else if (symbol_rate < SACLK / 10000 * 833) { dfn=2; afs=0; } else if (symbol_rate < SACLK / 10000 * 1100) { dfn=1; afs=1; } else if (symbol_rate < SACLK / 10000 * 1666) { dfn=1; afs=0; } else if (symbol_rate < SACLK / 10000 * 2200) { dfn=0; afs=1; } else if (symbol_rate < SACLK / 10000 * 3333) { dfn=0; afs=0; } else { reg37 = 0x63; reg42 = 0x4f; byp=1; } /* calculate BDR */ big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn); big += ((SACLK/1000ULL)-1ULL); do_div(big, (SACLK/1000ULL)); bdr = big & 0xfffff; /* calculate BDRI */ tmp = (1<<dfn)*(symbol_rate/1000); bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp; tda10086_write_byte(state, 0x21, (afs << 7) | dfn); tda10086_write_mask(state, 0x20, 0x08, byp << 3); tda10086_write_byte(state, 0x06, bdr); tda10086_write_byte(state, 0x07, bdr >> 8); tda10086_write_byte(state, 0x08, bdr >> 16); tda10086_write_byte(state, 0x09, bdri); tda10086_write_byte(state, 0x37, reg37); tda10086_write_byte(state, 0x42, reg42); return 0; } static int tda10086_set_fec(struct tda10086_state *state, struct dtv_frontend_properties *fe_params) { u8 fecval; dprintk("%s %i\n", __func__, fe_params->fec_inner); switch (fe_params->fec_inner) { case FEC_1_2: fecval = 0x00; break; case FEC_2_3: fecval = 0x01; break; case FEC_3_4: fecval = 0x02; break; case FEC_4_5: fecval = 0x03; break; case FEC_5_6: fecval = 0x04; break; case FEC_6_7: fecval = 0x05; break; case FEC_7_8: fecval = 0x06; break; case FEC_8_9: fecval = 0x07; break; case FEC_AUTO: fecval = 0x08; break; default: return -1; } tda10086_write_byte(state, 0x0d, fecval); return 0; } static int tda10086_set_frontend(struct dvb_frontend *fe) { struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache; struct tda10086_state *state = fe->demodulator_priv; int ret; u32 freq = 0; int freqoff; dprintk ("%s\n", __func__); /* modify parameters for tuning */ tda10086_write_byte(state, 0x02, 0x35); state->has_lock = false; /* set params */ if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); if (fe->ops.tuner_ops.get_frequency) fe->ops.tuner_ops.get_frequency(fe, &freq); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } /* calculate the frequency offset (in *Hz* not kHz) */ freqoff = fe_params->frequency - freq; freqoff = ((1<<16) * freqoff) / (SACLK/1000); tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f)); tda10086_write_byte(state, 0x3e, freqoff); if ((ret = tda10086_set_inversion(state, fe_params)) < 0) return ret; if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0) return ret; if ((ret = tda10086_set_fec(state, fe_params)) < 0) return ret; /* soft reset + disable TS output until lock */ tda10086_write_mask(state, 0x10, 0x40, 0x40); tda10086_write_mask(state, 0x00, 0x01, 0x00); state->symbol_rate = fe_params->symbol_rate; state->frequency = fe_params->frequency; return 0; } static int tda10086_get_frontend(struct dvb_frontend *fe, struct dtv_frontend_properties *fe_params) { struct tda10086_state* state = fe->demodulator_priv; u8 val; int tmp; u64 tmp64; dprintk ("%s\n", __func__); /* check for invalid symbol rate */ if (fe_params->symbol_rate < 500000) return -EINVAL; /* calculate the updated frequency (note: we convert from Hz->kHz) */ tmp64 = ((u64)tda10086_read_byte(state, 0x52) | (tda10086_read_byte(state, 0x51) << 8)); if (tmp64 & 0x8000) tmp64 |= 0xffffffffffff0000ULL; tmp64 = (tmp64 * (SACLK/1000ULL)); do_div(tmp64, (1ULL<<15) * (1ULL<<1)); fe_params->frequency = (int) state->frequency + (int) tmp64; /* the inversion */ val = tda10086_read_byte(state, 0x0c); if (val & 0x80) { switch(val & 0x40) { case 0x00: fe_params->inversion = INVERSION_OFF; if (state->config->invert) fe_params->inversion = INVERSION_ON; break; default: fe_params->inversion = INVERSION_ON; if (state->config->invert) fe_params->inversion = INVERSION_OFF; break; } } else { tda10086_read_byte(state, 0x0f); switch(val & 0x02) { case 0x00: fe_params->inversion = INVERSION_OFF; if (state->config->invert) fe_params->inversion = INVERSION_ON; break; default: fe_params->inversion = INVERSION_ON; if (state->config->invert) fe_params->inversion = INVERSION_OFF; break; } } /* calculate the updated symbol rate */ tmp = tda10086_read_byte(state, 0x1d); if (tmp & 0x80) tmp |= 0xffffff00; tmp = (tmp * 480 * (1<<1)) / 128; tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000); fe_params->symbol_rate = state->symbol_rate + tmp; /* the FEC */ val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4; switch(val) { case 0x00: fe_params->fec_inner = FEC_1_2; break; case 0x01: fe_params->fec_inner = FEC_2_3; break; case 0x02: fe_params->fec_inner = FEC_3_4; break; case 0x03: fe_params->fec_inner = FEC_4_5; break; case 0x04: fe_params->fec_inner = FEC_5_6; break; case 0x05: fe_params->fec_inner = FEC_6_7; break; case 0x06: fe_params->fec_inner = FEC_7_8; break; case 0x07: fe_params->fec_inner = FEC_8_9; break; } return 0; } static int tda10086_read_status(struct dvb_frontend *fe, enum fe_status *fe_status) { struct tda10086_state* state = fe->demodulator_priv; u8 val; dprintk ("%s\n", __func__); val = tda10086_read_byte(state, 0x0e); *fe_status = 0; if (val & 0x01) *fe_status |= FE_HAS_SIGNAL; if (val & 0x02) *fe_status |= FE_HAS_CARRIER; if (val & 0x04) *fe_status |= FE_HAS_VITERBI; if (val & 0x08) *fe_status |= FE_HAS_SYNC; if (val & 0x10) { *fe_status |= FE_HAS_LOCK; if (!state->has_lock) { state->has_lock = true; /* modify parameters for stable reception */ tda10086_write_byte(state, 0x02, 0x00); } } return 0; } static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal) { struct tda10086_state* state = fe->demodulator_priv; u8 _str; dprintk ("%s\n", __func__); _str = 0xff - tda10086_read_byte(state, 0x43); *signal = (_str << 8) | _str; return 0; } static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr) { struct tda10086_state* state = fe->demodulator_priv; u8 _snr; dprintk ("%s\n", __func__); _snr = 0xff - tda10086_read_byte(state, 0x1c); *snr = (_snr << 8) | _snr; return 0; } static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) { struct tda10086_state* state = fe->demodulator_priv; dprintk ("%s\n", __func__); /* read it */ *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f; /* reset counter */ tda10086_write_byte(state, 0x18, 0x00); tda10086_write_byte(state, 0x18, 0x80); return 0; } static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber) { struct tda10086_state* state = fe->demodulator_priv; dprintk ("%s\n", __func__); /* read it */ *ber = 0; *ber |= tda10086_read_byte(state, 0x15); *ber |= tda10086_read_byte(state, 0x16) << 8; *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16; return 0; } static int tda10086_sleep(struct dvb_frontend* fe) { struct tda10086_state* state = fe->demodulator_priv; dprintk ("%s\n", __func__); tda10086_write_mask(state, 0x00, 0x08, 0x08); return 0; } static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) { struct tda10086_state* state = fe->demodulator_priv; dprintk ("%s\n", __func__); if (enable) { tda10086_write_mask(state, 0x00, 0x10, 0x10); } else { tda10086_write_mask(state, 0x00, 0x10, 0x00); } return 0; } static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) { struct dtv_frontend_properties *p = &fe->dtv_property_cache; if (p->symbol_rate > 20000000) { fesettings->min_delay_ms = 50; fesettings->step_size = 2000; fesettings->max_drift = 8000; } else if (p->symbol_rate > 12000000) { fesettings->min_delay_ms = 100; fesettings->step_size = 1500; fesettings->max_drift = 9000; } else if (p->symbol_rate > 8000000) { fesettings->min_delay_ms = 100; fesettings->step_size = 1000; fesettings->max_drift = 8000; } else if (p->symbol_rate > 4000000) { fesettings->min_delay_ms = 100; fesettings->step_size = 500; fesettings->max_drift = 7000; } else if (p->symbol_rate > 2000000) { fesettings->min_delay_ms = 200; fesettings->step_size = p->symbol_rate / 8000; fesettings->max_drift = 14 * fesettings->step_size; } else { fesettings->min_delay_ms = 200; fesettings->step_size = p->symbol_rate / 8000; fesettings->max_drift = 18 * fesettings->step_size; } return 0; } static void tda10086_release(struct dvb_frontend* fe) { struct tda10086_state *state = fe->demodulator_priv; tda10086_sleep(fe); kfree(state); } static const struct dvb_frontend_ops tda10086_ops = { .delsys = { SYS_DVBS }, .info = { .name = "Philips TDA10086 DVB-S", .frequency_min_hz = 950 * MHz, .frequency_max_hz = 2150 * MHz, .frequency_stepsize_hz = 125 * kHz, .symbol_rate_min = 1000000, .symbol_rate_max = 45000000, .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | FE_CAN_QPSK }, .release = tda10086_release, .init = tda10086_init, .sleep = tda10086_sleep, .i2c_gate_ctrl = tda10086_i2c_gate_ctrl, .set_frontend = tda10086_set_frontend, .get_frontend = tda10086_get_frontend, .get_tune_settings = tda10086_get_tune_settings, .read_status = tda10086_read_status, .read_ber = tda10086_read_ber, .read_signal_strength = tda10086_read_signal_strength, .read_snr = tda10086_read_snr, .read_ucblocks = tda10086_read_ucblocks, .diseqc_send_master_cmd = tda10086_send_master_cmd, .diseqc_send_burst = tda10086_send_burst, .set_tone = tda10086_set_tone, }; struct dvb_frontend* tda10086_attach(const struct tda10086_config* config, struct i2c_adapter* i2c) { struct tda10086_state *state; dprintk ("%s\n", __func__); /* allocate memory for the internal state */ state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL); if (!state) return NULL; /* setup the state */ state->config = config; state->i2c = i2c; /* check if the demod is there */ if (tda10086_read_byte(state, 0x1e) != 0xe1) { kfree(state); return NULL; } /* create dvb_frontend */ memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops)); state->frontend.demodulator_priv = state; return &state->frontend; } module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator"); MODULE_AUTHOR("Andrew de Quincey"); MODULE_LICENSE("GPL"); EXPORT_SYMBOL_GPL(tda10086_attach); |