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1// SPDX-License-Identifier: GPL-2.0-or-later2 /*3 Driver for Philips tda10086 DVBS Demodulator4 5 (c) 2006 Andrew de Quincey6 7 8 */9 10#include <linux/init.h>11#include <linux/module.h>12#include <linux/device.h>13#include <linux/jiffies.h>14#include <linux/string.h>15#include <linux/slab.h>16 17#include <media/dvb_frontend.h>18#include "tda10086.h"19 20#define SACLK 96000000U21 22struct tda10086_state {23 struct i2c_adapter* i2c;24 const struct tda10086_config* config;25 struct dvb_frontend frontend;26 27 /* private demod data */28 u32 frequency;29 u32 symbol_rate;30 bool has_lock;31};32 33static int debug;34#define dprintk(args...) \35 do { \36 if (debug) printk(KERN_DEBUG "tda10086: " args); \37 } while (0)38 39static int tda10086_write_byte(struct tda10086_state *state, int reg, int data)40{41 int ret;42 u8 b0[] = { reg, data };43 struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 };44 45 msg.addr = state->config->demod_address;46 ret = i2c_transfer(state->i2c, &msg, 1);47 48 if (ret != 1)49 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",50 __func__, reg, data, ret);51 52 return (ret != 1) ? ret : 0;53}54 55static int tda10086_read_byte(struct tda10086_state *state, int reg)56{57 int ret;58 u8 b0[] = { reg };59 u8 b1[] = { 0 };60 struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 },61 { .flags = I2C_M_RD, .buf = b1, .len = 1 }};62 63 msg[0].addr = state->config->demod_address;64 msg[1].addr = state->config->demod_address;65 ret = i2c_transfer(state->i2c, msg, 2);66 67 if (ret != 2) {68 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg,69 ret);70 return ret;71 }72 73 return b1[0];74}75 76static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data)77{78 int val;79 80 /* read a byte and check */81 val = tda10086_read_byte(state, reg);82 if (val < 0)83 return val;84 85 /* mask if off */86 val = val & ~mask;87 val |= data & 0xff;88 89 /* write it out again */90 return tda10086_write_byte(state, reg, val);91}92 93static int tda10086_init(struct dvb_frontend* fe)94{95 struct tda10086_state* state = fe->demodulator_priv;96 u8 t22k_off = 0x80;97 98 dprintk ("%s\n", __func__);99 100 if (state->config->diseqc_tone)101 t22k_off = 0;102 /* reset */103 tda10086_write_byte(state, 0x00, 0x00);104 msleep(10);105 106 /* misc setup */107 tda10086_write_byte(state, 0x01, 0x94);108 tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */109 tda10086_write_byte(state, 0x03, 0xe4);110 tda10086_write_byte(state, 0x04, 0x43);111 tda10086_write_byte(state, 0x0c, 0x0c);112 tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */113 tda10086_write_byte(state, 0x20, 0x89); /* misc */114 tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */115 tda10086_write_byte(state, 0x32, 0x00); /* irq off */116 tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */117 118 /* setup PLL (this assumes SACLK = 96MHz) */119 tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */120 if (state->config->xtal_freq == TDA10086_XTAL_16M) {121 tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */122 tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */123 } else {124 tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */125 tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */126 }127 tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */128 129 /* setup TS interface */130 tda10086_write_byte(state, 0x11, 0x81);131 tda10086_write_byte(state, 0x12, 0x81);132 tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */133 tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */134 tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */135 tda10086_write_byte(state, 0x10, 0x2a);136 137 /* setup ADC */138 tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */139 tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */140 141 /* setup AGC */142 tda10086_write_byte(state, 0x05, 0x0B);143 tda10086_write_byte(state, 0x37, 0x63);144 tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */145 tda10086_write_byte(state, 0x40, 0x64);146 tda10086_write_byte(state, 0x41, 0x4f);147 tda10086_write_byte(state, 0x42, 0x43);148 149 /* setup viterbi */150 tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */151 152 /* setup carrier recovery */153 tda10086_write_byte(state, 0x3d, 0x80);154 155 /* setup SEC */156 tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */157 tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000)));158 tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8);159 160 return 0;161}162 163static void tda10086_diseqc_wait(struct tda10086_state *state)164{165 unsigned long timeout = jiffies + msecs_to_jiffies(200);166 while (!(tda10086_read_byte(state, 0x50) & 0x01)) {167 if(time_after(jiffies, timeout)) {168 printk("%s: diseqc queue not ready, command may be lost.\n", __func__);169 break;170 }171 msleep(10);172 }173}174 175static int tda10086_set_tone(struct dvb_frontend *fe,176 enum fe_sec_tone_mode tone)177{178 struct tda10086_state* state = fe->demodulator_priv;179 u8 t22k_off = 0x80;180 181 dprintk ("%s\n", __func__);182 183 if (state->config->diseqc_tone)184 t22k_off = 0;185 186 switch (tone) {187 case SEC_TONE_OFF:188 tda10086_write_byte(state, 0x36, t22k_off);189 break;190 191 case SEC_TONE_ON:192 tda10086_write_byte(state, 0x36, 0x01 + t22k_off);193 break;194 }195 196 return 0;197}198 199static int tda10086_send_master_cmd (struct dvb_frontend* fe,200 struct dvb_diseqc_master_cmd* cmd)201{202 struct tda10086_state* state = fe->demodulator_priv;203 int i;204 u8 oldval;205 u8 t22k_off = 0x80;206 207 dprintk ("%s\n", __func__);208 209 if (state->config->diseqc_tone)210 t22k_off = 0;211 212 if (cmd->msg_len > 6)213 return -EINVAL;214 oldval = tda10086_read_byte(state, 0x36);215 216 for(i=0; i< cmd->msg_len; i++) {217 tda10086_write_byte(state, 0x48+i, cmd->msg[i]);218 }219 tda10086_write_byte(state, 0x36, (0x08 + t22k_off)220 | ((cmd->msg_len - 1) << 4));221 222 tda10086_diseqc_wait(state);223 224 tda10086_write_byte(state, 0x36, oldval);225 226 return 0;227}228 229static int tda10086_send_burst(struct dvb_frontend *fe,230 enum fe_sec_mini_cmd minicmd)231{232 struct tda10086_state* state = fe->demodulator_priv;233 u8 oldval = tda10086_read_byte(state, 0x36);234 u8 t22k_off = 0x80;235 236 dprintk ("%s\n", __func__);237 238 if (state->config->diseqc_tone)239 t22k_off = 0;240 241 switch(minicmd) {242 case SEC_MINI_A:243 tda10086_write_byte(state, 0x36, 0x04 + t22k_off);244 break;245 246 case SEC_MINI_B:247 tda10086_write_byte(state, 0x36, 0x06 + t22k_off);248 break;249 }250 251 tda10086_diseqc_wait(state);252 253 tda10086_write_byte(state, 0x36, oldval);254 255 return 0;256}257 258static int tda10086_set_inversion(struct tda10086_state *state,259 struct dtv_frontend_properties *fe_params)260{261 u8 invval = 0x80;262 263 dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert);264 265 switch(fe_params->inversion) {266 case INVERSION_OFF:267 if (state->config->invert)268 invval = 0x40;269 break;270 case INVERSION_ON:271 if (!state->config->invert)272 invval = 0x40;273 break;274 case INVERSION_AUTO:275 invval = 0x00;276 break;277 }278 tda10086_write_mask(state, 0x0c, 0xc0, invval);279 280 return 0;281}282 283static int tda10086_set_symbol_rate(struct tda10086_state *state,284 struct dtv_frontend_properties *fe_params)285{286 u8 dfn = 0;287 u8 afs = 0;288 u8 byp = 0;289 u8 reg37 = 0x43;290 u8 reg42 = 0x43;291 u64 big;292 u32 tmp;293 u32 bdr;294 u32 bdri;295 u32 symbol_rate = fe_params->symbol_rate;296 297 dprintk ("%s %i\n", __func__, symbol_rate);298 299 /* setup the decimation and anti-aliasing filters.. */300 if (symbol_rate < SACLK / 10000 * 137) {301 dfn=4;302 afs=1;303 } else if (symbol_rate < SACLK / 10000 * 208) {304 dfn=4;305 afs=0;306 } else if (symbol_rate < SACLK / 10000 * 270) {307 dfn=3;308 afs=1;309 } else if (symbol_rate < SACLK / 10000 * 416) {310 dfn=3;311 afs=0;312 } else if (symbol_rate < SACLK / 10000 * 550) {313 dfn=2;314 afs=1;315 } else if (symbol_rate < SACLK / 10000 * 833) {316 dfn=2;317 afs=0;318 } else if (symbol_rate < SACLK / 10000 * 1100) {319 dfn=1;320 afs=1;321 } else if (symbol_rate < SACLK / 10000 * 1666) {322 dfn=1;323 afs=0;324 } else if (symbol_rate < SACLK / 10000 * 2200) {325 dfn=0;326 afs=1;327 } else if (symbol_rate < SACLK / 10000 * 3333) {328 dfn=0;329 afs=0;330 } else {331 reg37 = 0x63;332 reg42 = 0x4f;333 byp=1;334 }335 336 /* calculate BDR */337 big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);338 big += ((SACLK/1000ULL)-1ULL);339 do_div(big, (SACLK/1000ULL));340 bdr = big & 0xfffff;341 342 /* calculate BDRI */343 tmp = (1<<dfn)*(symbol_rate/1000);344 bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;345 346 tda10086_write_byte(state, 0x21, (afs << 7) | dfn);347 tda10086_write_mask(state, 0x20, 0x08, byp << 3);348 tda10086_write_byte(state, 0x06, bdr);349 tda10086_write_byte(state, 0x07, bdr >> 8);350 tda10086_write_byte(state, 0x08, bdr >> 16);351 tda10086_write_byte(state, 0x09, bdri);352 tda10086_write_byte(state, 0x37, reg37);353 tda10086_write_byte(state, 0x42, reg42);354 355 return 0;356}357 358static int tda10086_set_fec(struct tda10086_state *state,359 struct dtv_frontend_properties *fe_params)360{361 u8 fecval;362 363 dprintk("%s %i\n", __func__, fe_params->fec_inner);364 365 switch (fe_params->fec_inner) {366 case FEC_1_2:367 fecval = 0x00;368 break;369 case FEC_2_3:370 fecval = 0x01;371 break;372 case FEC_3_4:373 fecval = 0x02;374 break;375 case FEC_4_5:376 fecval = 0x03;377 break;378 case FEC_5_6:379 fecval = 0x04;380 break;381 case FEC_6_7:382 fecval = 0x05;383 break;384 case FEC_7_8:385 fecval = 0x06;386 break;387 case FEC_8_9:388 fecval = 0x07;389 break;390 case FEC_AUTO:391 fecval = 0x08;392 break;393 default:394 return -1;395 }396 tda10086_write_byte(state, 0x0d, fecval);397 398 return 0;399}400 401static int tda10086_set_frontend(struct dvb_frontend *fe)402{403 struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;404 struct tda10086_state *state = fe->demodulator_priv;405 int ret;406 u32 freq = 0;407 int freqoff;408 409 dprintk ("%s\n", __func__);410 411 /* modify parameters for tuning */412 tda10086_write_byte(state, 0x02, 0x35);413 state->has_lock = false;414 415 /* set params */416 if (fe->ops.tuner_ops.set_params) {417 fe->ops.tuner_ops.set_params(fe);418 if (fe->ops.i2c_gate_ctrl)419 fe->ops.i2c_gate_ctrl(fe, 0);420 421 if (fe->ops.tuner_ops.get_frequency)422 fe->ops.tuner_ops.get_frequency(fe, &freq);423 if (fe->ops.i2c_gate_ctrl)424 fe->ops.i2c_gate_ctrl(fe, 0);425 }426 427 /* calculate the frequency offset (in *Hz* not kHz) */428 freqoff = fe_params->frequency - freq;429 freqoff = ((1<<16) * freqoff) / (SACLK/1000);430 tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));431 tda10086_write_byte(state, 0x3e, freqoff);432 433 if ((ret = tda10086_set_inversion(state, fe_params)) < 0)434 return ret;435 if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)436 return ret;437 if ((ret = tda10086_set_fec(state, fe_params)) < 0)438 return ret;439 440 /* soft reset + disable TS output until lock */441 tda10086_write_mask(state, 0x10, 0x40, 0x40);442 tda10086_write_mask(state, 0x00, 0x01, 0x00);443 444 state->symbol_rate = fe_params->symbol_rate;445 state->frequency = fe_params->frequency;446 return 0;447}448 449static int tda10086_get_frontend(struct dvb_frontend *fe,450 struct dtv_frontend_properties *fe_params)451{452 struct tda10086_state* state = fe->demodulator_priv;453 u8 val;454 int tmp;455 u64 tmp64;456 457 dprintk ("%s\n", __func__);458 459 /* check for invalid symbol rate */460 if (fe_params->symbol_rate < 500000)461 return -EINVAL;462 463 /* calculate the updated frequency (note: we convert from Hz->kHz) */464 tmp64 = ((u64)tda10086_read_byte(state, 0x52)465 | (tda10086_read_byte(state, 0x51) << 8));466 if (tmp64 & 0x8000)467 tmp64 |= 0xffffffffffff0000ULL;468 tmp64 = (tmp64 * (SACLK/1000ULL));469 do_div(tmp64, (1ULL<<15) * (1ULL<<1));470 fe_params->frequency = (int) state->frequency + (int) tmp64;471 472 /* the inversion */473 val = tda10086_read_byte(state, 0x0c);474 if (val & 0x80) {475 switch(val & 0x40) {476 case 0x00:477 fe_params->inversion = INVERSION_OFF;478 if (state->config->invert)479 fe_params->inversion = INVERSION_ON;480 break;481 default:482 fe_params->inversion = INVERSION_ON;483 if (state->config->invert)484 fe_params->inversion = INVERSION_OFF;485 break;486 }487 } else {488 tda10086_read_byte(state, 0x0f);489 switch(val & 0x02) {490 case 0x00:491 fe_params->inversion = INVERSION_OFF;492 if (state->config->invert)493 fe_params->inversion = INVERSION_ON;494 break;495 default:496 fe_params->inversion = INVERSION_ON;497 if (state->config->invert)498 fe_params->inversion = INVERSION_OFF;499 break;500 }501 }502 503 /* calculate the updated symbol rate */504 tmp = tda10086_read_byte(state, 0x1d);505 if (tmp & 0x80)506 tmp |= 0xffffff00;507 tmp = (tmp * 480 * (1<<1)) / 128;508 tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);509 fe_params->symbol_rate = state->symbol_rate + tmp;510 511 /* the FEC */512 val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;513 switch(val) {514 case 0x00:515 fe_params->fec_inner = FEC_1_2;516 break;517 case 0x01:518 fe_params->fec_inner = FEC_2_3;519 break;520 case 0x02:521 fe_params->fec_inner = FEC_3_4;522 break;523 case 0x03:524 fe_params->fec_inner = FEC_4_5;525 break;526 case 0x04:527 fe_params->fec_inner = FEC_5_6;528 break;529 case 0x05:530 fe_params->fec_inner = FEC_6_7;531 break;532 case 0x06:533 fe_params->fec_inner = FEC_7_8;534 break;535 case 0x07:536 fe_params->fec_inner = FEC_8_9;537 break;538 }539 540 return 0;541}542 543static int tda10086_read_status(struct dvb_frontend *fe,544 enum fe_status *fe_status)545{546 struct tda10086_state* state = fe->demodulator_priv;547 u8 val;548 549 dprintk ("%s\n", __func__);550 551 val = tda10086_read_byte(state, 0x0e);552 *fe_status = 0;553 if (val & 0x01)554 *fe_status |= FE_HAS_SIGNAL;555 if (val & 0x02)556 *fe_status |= FE_HAS_CARRIER;557 if (val & 0x04)558 *fe_status |= FE_HAS_VITERBI;559 if (val & 0x08)560 *fe_status |= FE_HAS_SYNC;561 if (val & 0x10) {562 *fe_status |= FE_HAS_LOCK;563 if (!state->has_lock) {564 state->has_lock = true;565 /* modify parameters for stable reception */566 tda10086_write_byte(state, 0x02, 0x00);567 }568 }569 570 return 0;571}572 573static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)574{575 struct tda10086_state* state = fe->demodulator_priv;576 u8 _str;577 578 dprintk ("%s\n", __func__);579 580 _str = 0xff - tda10086_read_byte(state, 0x43);581 *signal = (_str << 8) | _str;582 583 return 0;584}585 586static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)587{588 struct tda10086_state* state = fe->demodulator_priv;589 u8 _snr;590 591 dprintk ("%s\n", __func__);592 593 _snr = 0xff - tda10086_read_byte(state, 0x1c);594 *snr = (_snr << 8) | _snr;595 596 return 0;597}598 599static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)600{601 struct tda10086_state* state = fe->demodulator_priv;602 603 dprintk ("%s\n", __func__);604 605 /* read it */606 *ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;607 608 /* reset counter */609 tda10086_write_byte(state, 0x18, 0x00);610 tda10086_write_byte(state, 0x18, 0x80);611 612 return 0;613}614 615static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)616{617 struct tda10086_state* state = fe->demodulator_priv;618 619 dprintk ("%s\n", __func__);620 621 /* read it */622 *ber = 0;623 *ber |= tda10086_read_byte(state, 0x15);624 *ber |= tda10086_read_byte(state, 0x16) << 8;625 *ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;626 627 return 0;628}629 630static int tda10086_sleep(struct dvb_frontend* fe)631{632 struct tda10086_state* state = fe->demodulator_priv;633 634 dprintk ("%s\n", __func__);635 636 tda10086_write_mask(state, 0x00, 0x08, 0x08);637 638 return 0;639}640 641static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)642{643 struct tda10086_state* state = fe->demodulator_priv;644 645 dprintk ("%s\n", __func__);646 647 if (enable) {648 tda10086_write_mask(state, 0x00, 0x10, 0x10);649 } else {650 tda10086_write_mask(state, 0x00, 0x10, 0x00);651 }652 653 return 0;654}655 656static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)657{658 struct dtv_frontend_properties *p = &fe->dtv_property_cache;659 660 if (p->symbol_rate > 20000000) {661 fesettings->min_delay_ms = 50;662 fesettings->step_size = 2000;663 fesettings->max_drift = 8000;664 } else if (p->symbol_rate > 12000000) {665 fesettings->min_delay_ms = 100;666 fesettings->step_size = 1500;667 fesettings->max_drift = 9000;668 } else if (p->symbol_rate > 8000000) {669 fesettings->min_delay_ms = 100;670 fesettings->step_size = 1000;671 fesettings->max_drift = 8000;672 } else if (p->symbol_rate > 4000000) {673 fesettings->min_delay_ms = 100;674 fesettings->step_size = 500;675 fesettings->max_drift = 7000;676 } else if (p->symbol_rate > 2000000) {677 fesettings->min_delay_ms = 200;678 fesettings->step_size = p->symbol_rate / 8000;679 fesettings->max_drift = 14 * fesettings->step_size;680 } else {681 fesettings->min_delay_ms = 200;682 fesettings->step_size = p->symbol_rate / 8000;683 fesettings->max_drift = 18 * fesettings->step_size;684 }685 686 return 0;687}688 689static void tda10086_release(struct dvb_frontend* fe)690{691 struct tda10086_state *state = fe->demodulator_priv;692 tda10086_sleep(fe);693 kfree(state);694}695 696static const struct dvb_frontend_ops tda10086_ops = {697 .delsys = { SYS_DVBS },698 .info = {699 .name = "Philips TDA10086 DVB-S",700 .frequency_min_hz = 950 * MHz,701 .frequency_max_hz = 2150 * MHz,702 .frequency_stepsize_hz = 125 * kHz,703 .symbol_rate_min = 1000000,704 .symbol_rate_max = 45000000,705 .caps = FE_CAN_INVERSION_AUTO |706 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |707 FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |708 FE_CAN_QPSK709 },710 711 .release = tda10086_release,712 713 .init = tda10086_init,714 .sleep = tda10086_sleep,715 .i2c_gate_ctrl = tda10086_i2c_gate_ctrl,716 717 .set_frontend = tda10086_set_frontend,718 .get_frontend = tda10086_get_frontend,719 .get_tune_settings = tda10086_get_tune_settings,720 721 .read_status = tda10086_read_status,722 .read_ber = tda10086_read_ber,723 .read_signal_strength = tda10086_read_signal_strength,724 .read_snr = tda10086_read_snr,725 .read_ucblocks = tda10086_read_ucblocks,726 727 .diseqc_send_master_cmd = tda10086_send_master_cmd,728 .diseqc_send_burst = tda10086_send_burst,729 .set_tone = tda10086_set_tone,730};731 732struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,733 struct i2c_adapter* i2c)734{735 struct tda10086_state *state;736 737 dprintk ("%s\n", __func__);738 739 /* allocate memory for the internal state */740 state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL);741 if (!state)742 return NULL;743 744 /* setup the state */745 state->config = config;746 state->i2c = i2c;747 748 /* check if the demod is there */749 if (tda10086_read_byte(state, 0x1e) != 0xe1) {750 kfree(state);751 return NULL;752 }753 754 /* create dvb_frontend */755 memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));756 state->frontend.demodulator_priv = state;757 return &state->frontend;758}759 760module_param(debug, int, 0644);761MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");762 763MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");764MODULE_AUTHOR("Andrew de Quincey");765MODULE_LICENSE("GPL");766 767EXPORT_SYMBOL_GPL(tda10086_attach);768