919 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 Auvitek AU8522 QAM/8VSB demodulator driver4 5 Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>6 7 8*/9 10#include <linux/kernel.h>11#include <linux/init.h>12#include <linux/module.h>13#include <linux/string.h>14#include <linux/delay.h>15#include <media/dvb_frontend.h>16#include "au8522.h"17#include "au8522_priv.h"18 19static int debug;20static int zv_mode = 1; /* default to on */21 22#define dprintk(arg...)\23 do { if (debug)\24 printk(arg);\25 } while (0)26 27struct mse2snr_tab {28 u16 val;29 u16 data;30};31 32/* VSB SNR lookup table */33static struct mse2snr_tab vsb_mse2snr_tab[] = {34 { 0, 270 },35 { 2, 250 },36 { 3, 240 },37 { 5, 230 },38 { 7, 220 },39 { 9, 210 },40 { 12, 200 },41 { 13, 195 },42 { 15, 190 },43 { 17, 185 },44 { 19, 180 },45 { 21, 175 },46 { 24, 170 },47 { 27, 165 },48 { 31, 160 },49 { 32, 158 },50 { 33, 156 },51 { 36, 152 },52 { 37, 150 },53 { 39, 148 },54 { 40, 146 },55 { 41, 144 },56 { 43, 142 },57 { 44, 140 },58 { 48, 135 },59 { 50, 130 },60 { 43, 142 },61 { 53, 125 },62 { 56, 120 },63 { 256, 115 },64};65 66/* QAM64 SNR lookup table */67static struct mse2snr_tab qam64_mse2snr_tab[] = {68 { 15, 0 },69 { 16, 290 },70 { 17, 288 },71 { 18, 286 },72 { 19, 284 },73 { 20, 282 },74 { 21, 281 },75 { 22, 279 },76 { 23, 277 },77 { 24, 275 },78 { 25, 273 },79 { 26, 271 },80 { 27, 269 },81 { 28, 268 },82 { 29, 266 },83 { 30, 264 },84 { 31, 262 },85 { 32, 260 },86 { 33, 259 },87 { 34, 258 },88 { 35, 256 },89 { 36, 255 },90 { 37, 254 },91 { 38, 252 },92 { 39, 251 },93 { 40, 250 },94 { 41, 249 },95 { 42, 248 },96 { 43, 246 },97 { 44, 245 },98 { 45, 244 },99 { 46, 242 },100 { 47, 241 },101 { 48, 240 },102 { 50, 239 },103 { 51, 238 },104 { 53, 237 },105 { 54, 236 },106 { 56, 235 },107 { 57, 234 },108 { 59, 233 },109 { 60, 232 },110 { 62, 231 },111 { 63, 230 },112 { 65, 229 },113 { 67, 228 },114 { 68, 227 },115 { 70, 226 },116 { 71, 225 },117 { 73, 224 },118 { 74, 223 },119 { 76, 222 },120 { 78, 221 },121 { 80, 220 },122 { 82, 219 },123 { 85, 218 },124 { 88, 217 },125 { 90, 216 },126 { 92, 215 },127 { 93, 214 },128 { 94, 212 },129 { 95, 211 },130 { 97, 210 },131 { 99, 209 },132 { 101, 208 },133 { 102, 207 },134 { 104, 206 },135 { 107, 205 },136 { 111, 204 },137 { 114, 203 },138 { 118, 202 },139 { 122, 201 },140 { 125, 200 },141 { 128, 199 },142 { 130, 198 },143 { 132, 197 },144 { 256, 190 },145};146 147/* QAM256 SNR lookup table */148static struct mse2snr_tab qam256_mse2snr_tab[] = {149 { 15, 0 },150 { 16, 400 },151 { 17, 398 },152 { 18, 396 },153 { 19, 394 },154 { 20, 392 },155 { 21, 390 },156 { 22, 388 },157 { 23, 386 },158 { 24, 384 },159 { 25, 382 },160 { 26, 380 },161 { 27, 379 },162 { 28, 378 },163 { 29, 377 },164 { 30, 376 },165 { 31, 375 },166 { 32, 374 },167 { 33, 373 },168 { 34, 372 },169 { 35, 371 },170 { 36, 370 },171 { 37, 362 },172 { 38, 354 },173 { 39, 346 },174 { 40, 338 },175 { 41, 330 },176 { 42, 328 },177 { 43, 326 },178 { 44, 324 },179 { 45, 322 },180 { 46, 320 },181 { 47, 319 },182 { 48, 318 },183 { 49, 317 },184 { 50, 316 },185 { 51, 315 },186 { 52, 314 },187 { 53, 313 },188 { 54, 312 },189 { 55, 311 },190 { 56, 310 },191 { 57, 308 },192 { 58, 306 },193 { 59, 304 },194 { 60, 302 },195 { 61, 300 },196 { 62, 298 },197 { 65, 295 },198 { 68, 294 },199 { 70, 293 },200 { 73, 292 },201 { 76, 291 },202 { 78, 290 },203 { 79, 289 },204 { 81, 288 },205 { 82, 287 },206 { 83, 286 },207 { 84, 285 },208 { 85, 284 },209 { 86, 283 },210 { 88, 282 },211 { 89, 281 },212 { 256, 280 },213};214 215static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse,216 u16 *snr)217{218 int i, ret = -EINVAL;219 dprintk("%s()\n", __func__);220 221 for (i = 0; i < sz; i++) {222 if (mse < tab[i].val) {223 *snr = tab[i].data;224 ret = 0;225 break;226 }227 }228 dprintk("%s() snr=%d\n", __func__, *snr);229 return ret;230}231 232static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq)233{234 struct au8522_state *state = fe->demodulator_priv;235 u8 r0b5, r0b6, r0b7;236 char *ifmhz;237 238 switch (if_freq) {239 case AU8522_IF_3_25MHZ:240 ifmhz = "3.25";241 r0b5 = 0x00;242 r0b6 = 0x3d;243 r0b7 = 0xa0;244 break;245 case AU8522_IF_4MHZ:246 ifmhz = "4.00";247 r0b5 = 0x00;248 r0b6 = 0x4b;249 r0b7 = 0xd9;250 break;251 case AU8522_IF_6MHZ:252 ifmhz = "6.00";253 r0b5 = 0xfb;254 r0b6 = 0x8e;255 r0b7 = 0x39;256 break;257 default:258 dprintk("%s() IF Frequency not supported\n", __func__);259 return -EINVAL;260 }261 dprintk("%s() %s MHz\n", __func__, ifmhz);262 au8522_writereg(state, 0x00b5, r0b5);263 au8522_writereg(state, 0x00b6, r0b6);264 au8522_writereg(state, 0x00b7, r0b7);265 266 return 0;267}268 269/* VSB Modulation table */270static struct {271 u16 reg;272 u16 data;273} VSB_mod_tab[] = {274 { 0x0090, 0x84 },275 { 0x2005, 0x00 },276 { 0x0091, 0x80 },277 { 0x00a3, 0x0c },278 { 0x00a4, 0xe8 },279 { 0x0081, 0xc4 },280 { 0x00a5, 0x40 },281 { 0x00a7, 0x40 },282 { 0x00a6, 0x67 },283 { 0x0262, 0x20 },284 { 0x021c, 0x30 },285 { 0x00d8, 0x1a },286 { 0x0227, 0xa0 },287 { 0x0121, 0xff },288 { 0x00a8, 0xf0 },289 { 0x00a9, 0x05 },290 { 0x00aa, 0x77 },291 { 0x00ab, 0xf0 },292 { 0x00ac, 0x05 },293 { 0x00ad, 0x77 },294 { 0x00ae, 0x41 },295 { 0x00af, 0x66 },296 { 0x021b, 0xcc },297 { 0x021d, 0x80 },298 { 0x00a4, 0xe8 },299 { 0x0231, 0x13 },300};301 302/* QAM64 Modulation table */303static struct {304 u16 reg;305 u16 data;306} QAM64_mod_tab[] = {307 { 0x00a3, 0x09 },308 { 0x00a4, 0x00 },309 { 0x0081, 0xc4 },310 { 0x00a5, 0x40 },311 { 0x00aa, 0x77 },312 { 0x00ad, 0x77 },313 { 0x00a6, 0x67 },314 { 0x0262, 0x20 },315 { 0x021c, 0x30 },316 { 0x00b8, 0x3e },317 { 0x00b9, 0xf0 },318 { 0x00ba, 0x01 },319 { 0x00bb, 0x18 },320 { 0x00bc, 0x50 },321 { 0x00bd, 0x00 },322 { 0x00be, 0xea },323 { 0x00bf, 0xef },324 { 0x00c0, 0xfc },325 { 0x00c1, 0xbd },326 { 0x00c2, 0x1f },327 { 0x00c3, 0xfc },328 { 0x00c4, 0xdd },329 { 0x00c5, 0xaf },330 { 0x00c6, 0x00 },331 { 0x00c7, 0x38 },332 { 0x00c8, 0x30 },333 { 0x00c9, 0x05 },334 { 0x00ca, 0x4a },335 { 0x00cb, 0xd0 },336 { 0x00cc, 0x01 },337 { 0x00cd, 0xd9 },338 { 0x00ce, 0x6f },339 { 0x00cf, 0xf9 },340 { 0x00d0, 0x70 },341 { 0x00d1, 0xdf },342 { 0x00d2, 0xf7 },343 { 0x00d3, 0xc2 },344 { 0x00d4, 0xdf },345 { 0x00d5, 0x02 },346 { 0x00d6, 0x9a },347 { 0x00d7, 0xd0 },348 { 0x0250, 0x0d },349 { 0x0251, 0xcd },350 { 0x0252, 0xe0 },351 { 0x0253, 0x05 },352 { 0x0254, 0xa7 },353 { 0x0255, 0xff },354 { 0x0256, 0xed },355 { 0x0257, 0x5b },356 { 0x0258, 0xae },357 { 0x0259, 0xe6 },358 { 0x025a, 0x3d },359 { 0x025b, 0x0f },360 { 0x025c, 0x0d },361 { 0x025d, 0xea },362 { 0x025e, 0xf2 },363 { 0x025f, 0x51 },364 { 0x0260, 0xf5 },365 { 0x0261, 0x06 },366 { 0x021a, 0x00 },367 { 0x0546, 0x40 },368 { 0x0210, 0xc7 },369 { 0x0211, 0xaa },370 { 0x0212, 0xab },371 { 0x0213, 0x02 },372 { 0x0502, 0x00 },373 { 0x0121, 0x04 },374 { 0x0122, 0x04 },375 { 0x052e, 0x10 },376 { 0x00a4, 0xca },377 { 0x00a7, 0x40 },378 { 0x0526, 0x01 },379};380 381/* QAM256 Modulation table */382static struct {383 u16 reg;384 u16 data;385} QAM256_mod_tab[] = {386 { 0x00a3, 0x09 },387 { 0x00a4, 0x00 },388 { 0x0081, 0xc4 },389 { 0x00a5, 0x40 },390 { 0x00aa, 0x77 },391 { 0x00ad, 0x77 },392 { 0x00a6, 0x67 },393 { 0x0262, 0x20 },394 { 0x021c, 0x30 },395 { 0x00b8, 0x3e },396 { 0x00b9, 0xf0 },397 { 0x00ba, 0x01 },398 { 0x00bb, 0x18 },399 { 0x00bc, 0x50 },400 { 0x00bd, 0x00 },401 { 0x00be, 0xea },402 { 0x00bf, 0xef },403 { 0x00c0, 0xfc },404 { 0x00c1, 0xbd },405 { 0x00c2, 0x1f },406 { 0x00c3, 0xfc },407 { 0x00c4, 0xdd },408 { 0x00c5, 0xaf },409 { 0x00c6, 0x00 },410 { 0x00c7, 0x38 },411 { 0x00c8, 0x30 },412 { 0x00c9, 0x05 },413 { 0x00ca, 0x4a },414 { 0x00cb, 0xd0 },415 { 0x00cc, 0x01 },416 { 0x00cd, 0xd9 },417 { 0x00ce, 0x6f },418 { 0x00cf, 0xf9 },419 { 0x00d0, 0x70 },420 { 0x00d1, 0xdf },421 { 0x00d2, 0xf7 },422 { 0x00d3, 0xc2 },423 { 0x00d4, 0xdf },424 { 0x00d5, 0x02 },425 { 0x00d6, 0x9a },426 { 0x00d7, 0xd0 },427 { 0x0250, 0x0d },428 { 0x0251, 0xcd },429 { 0x0252, 0xe0 },430 { 0x0253, 0x05 },431 { 0x0254, 0xa7 },432 { 0x0255, 0xff },433 { 0x0256, 0xed },434 { 0x0257, 0x5b },435 { 0x0258, 0xae },436 { 0x0259, 0xe6 },437 { 0x025a, 0x3d },438 { 0x025b, 0x0f },439 { 0x025c, 0x0d },440 { 0x025d, 0xea },441 { 0x025e, 0xf2 },442 { 0x025f, 0x51 },443 { 0x0260, 0xf5 },444 { 0x0261, 0x06 },445 { 0x021a, 0x00 },446 { 0x0546, 0x40 },447 { 0x0210, 0x26 },448 { 0x0211, 0xf6 },449 { 0x0212, 0x84 },450 { 0x0213, 0x02 },451 { 0x0502, 0x01 },452 { 0x0121, 0x04 },453 { 0x0122, 0x04 },454 { 0x052e, 0x10 },455 { 0x00a4, 0xca },456 { 0x00a7, 0x40 },457 { 0x0526, 0x01 },458};459 460static struct {461 u16 reg;462 u16 data;463} QAM256_mod_tab_zv_mode[] = {464 { 0x80a3, 0x09 },465 { 0x80a4, 0x00 },466 { 0x8081, 0xc4 },467 { 0x80a5, 0x40 },468 { 0x80b5, 0xfb },469 { 0x80b6, 0x8e },470 { 0x80b7, 0x39 },471 { 0x80aa, 0x77 },472 { 0x80ad, 0x77 },473 { 0x80a6, 0x67 },474 { 0x8262, 0x20 },475 { 0x821c, 0x30 },476 { 0x80b8, 0x3e },477 { 0x80b9, 0xf0 },478 { 0x80ba, 0x01 },479 { 0x80bb, 0x18 },480 { 0x80bc, 0x50 },481 { 0x80bd, 0x00 },482 { 0x80be, 0xea },483 { 0x80bf, 0xef },484 { 0x80c0, 0xfc },485 { 0x80c1, 0xbd },486 { 0x80c2, 0x1f },487 { 0x80c3, 0xfc },488 { 0x80c4, 0xdd },489 { 0x80c5, 0xaf },490 { 0x80c6, 0x00 },491 { 0x80c7, 0x38 },492 { 0x80c8, 0x30 },493 { 0x80c9, 0x05 },494 { 0x80ca, 0x4a },495 { 0x80cb, 0xd0 },496 { 0x80cc, 0x01 },497 { 0x80cd, 0xd9 },498 { 0x80ce, 0x6f },499 { 0x80cf, 0xf9 },500 { 0x80d0, 0x70 },501 { 0x80d1, 0xdf },502 { 0x80d2, 0xf7 },503 { 0x80d3, 0xc2 },504 { 0x80d4, 0xdf },505 { 0x80d5, 0x02 },506 { 0x80d6, 0x9a },507 { 0x80d7, 0xd0 },508 { 0x8250, 0x0d },509 { 0x8251, 0xcd },510 { 0x8252, 0xe0 },511 { 0x8253, 0x05 },512 { 0x8254, 0xa7 },513 { 0x8255, 0xff },514 { 0x8256, 0xed },515 { 0x8257, 0x5b },516 { 0x8258, 0xae },517 { 0x8259, 0xe6 },518 { 0x825a, 0x3d },519 { 0x825b, 0x0f },520 { 0x825c, 0x0d },521 { 0x825d, 0xea },522 { 0x825e, 0xf2 },523 { 0x825f, 0x51 },524 { 0x8260, 0xf5 },525 { 0x8261, 0x06 },526 { 0x821a, 0x01 },527 { 0x8546, 0x40 },528 { 0x8210, 0x26 },529 { 0x8211, 0xf6 },530 { 0x8212, 0x84 },531 { 0x8213, 0x02 },532 { 0x8502, 0x01 },533 { 0x8121, 0x04 },534 { 0x8122, 0x04 },535 { 0x852e, 0x10 },536 { 0x80a4, 0xca },537 { 0x80a7, 0x40 },538 { 0x8526, 0x01 },539};540 541static int au8522_enable_modulation(struct dvb_frontend *fe,542 enum fe_modulation m)543{544 struct au8522_state *state = fe->demodulator_priv;545 int i;546 547 dprintk("%s(0x%08x)\n", __func__, m);548 549 switch (m) {550 case VSB_8:551 dprintk("%s() VSB_8\n", __func__);552 for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++)553 au8522_writereg(state,554 VSB_mod_tab[i].reg,555 VSB_mod_tab[i].data);556 au8522_set_if(fe, state->config.vsb_if);557 break;558 case QAM_64:559 dprintk("%s() QAM 64\n", __func__);560 for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++)561 au8522_writereg(state,562 QAM64_mod_tab[i].reg,563 QAM64_mod_tab[i].data);564 au8522_set_if(fe, state->config.qam_if);565 break;566 case QAM_256:567 if (zv_mode) {568 dprintk("%s() QAM 256 (zv_mode)\n", __func__);569 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++)570 au8522_writereg(state,571 QAM256_mod_tab_zv_mode[i].reg,572 QAM256_mod_tab_zv_mode[i].data);573 au8522_set_if(fe, state->config.qam_if);574 msleep(100);575 au8522_writereg(state, 0x821a, 0x00);576 } else {577 dprintk("%s() QAM 256\n", __func__);578 for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++)579 au8522_writereg(state,580 QAM256_mod_tab[i].reg,581 QAM256_mod_tab[i].data);582 au8522_set_if(fe, state->config.qam_if);583 }584 break;585 default:586 dprintk("%s() Invalid modulation\n", __func__);587 return -EINVAL;588 }589 590 state->current_modulation = m;591 592 return 0;593}594 595/* Talk to the demod, set the FEC, GUARD, QAM settings etc */596static int au8522_set_frontend(struct dvb_frontend *fe)597{598 struct dtv_frontend_properties *c = &fe->dtv_property_cache;599 struct au8522_state *state = fe->demodulator_priv;600 int ret = -EINVAL;601 602 dprintk("%s(frequency=%d)\n", __func__, c->frequency);603 604 if ((state->current_frequency == c->frequency) &&605 (state->current_modulation == c->modulation))606 return 0;607 608 if (fe->ops.tuner_ops.set_params) {609 if (fe->ops.i2c_gate_ctrl)610 fe->ops.i2c_gate_ctrl(fe, 1);611 ret = fe->ops.tuner_ops.set_params(fe);612 if (fe->ops.i2c_gate_ctrl)613 fe->ops.i2c_gate_ctrl(fe, 0);614 }615 616 if (ret < 0)617 return ret;618 619 /* Allow the tuner to settle */620 if (zv_mode) {621 dprintk("%s() increase tuner settling time for zv_mode\n",622 __func__);623 msleep(250);624 } else625 msleep(100);626 627 au8522_enable_modulation(fe, c->modulation);628 629 state->current_frequency = c->frequency;630 631 return 0;632}633 634static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status)635{636 struct au8522_state *state = fe->demodulator_priv;637 u8 reg;638 u32 tuner_status = 0;639 640 *status = 0;641 642 if (state->current_modulation == VSB_8) {643 dprintk("%s() Checking VSB_8\n", __func__);644 reg = au8522_readreg(state, 0x0088);645 if ((reg & 0x03) == 0x03)646 *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI;647 } else {648 dprintk("%s() Checking QAM\n", __func__);649 reg = au8522_readreg(state, 0x0541);650 if (reg & 0x80)651 *status |= FE_HAS_VITERBI;652 if (reg & 0x20)653 *status |= FE_HAS_LOCK | FE_HAS_SYNC;654 }655 656 switch (state->config.status_mode) {657 case AU8522_DEMODLOCKING:658 dprintk("%s() DEMODLOCKING\n", __func__);659 if (*status & FE_HAS_VITERBI)660 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;661 break;662 case AU8522_TUNERLOCKING:663 /* Get the tuner status */664 dprintk("%s() TUNERLOCKING\n", __func__);665 if (fe->ops.tuner_ops.get_status) {666 if (fe->ops.i2c_gate_ctrl)667 fe->ops.i2c_gate_ctrl(fe, 1);668 669 fe->ops.tuner_ops.get_status(fe, &tuner_status);670 671 if (fe->ops.i2c_gate_ctrl)672 fe->ops.i2c_gate_ctrl(fe, 0);673 }674 if (tuner_status)675 *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;676 break;677 }678 state->fe_status = *status;679 680 if (*status & FE_HAS_LOCK)681 /* turn on LED, if it isn't on already */682 au8522_led_ctrl(state, -1);683 else684 /* turn off LED */685 au8522_led_ctrl(state, 0);686 687 dprintk("%s() status 0x%08x\n", __func__, *status);688 689 return 0;690}691 692static int au8522_led_status(struct au8522_state *state, const u16 *snr)693{694 struct au8522_led_config *led_config = state->config.led_cfg;695 int led;696 u16 strong;697 698 /* bail out if we can't control an LED */699 if (!led_config)700 return 0;701 702 if (0 == (state->fe_status & FE_HAS_LOCK))703 return au8522_led_ctrl(state, 0);704 else if (state->current_modulation == QAM_256)705 strong = led_config->qam256_strong;706 else if (state->current_modulation == QAM_64)707 strong = led_config->qam64_strong;708 else /* (state->current_modulation == VSB_8) */709 strong = led_config->vsb8_strong;710 711 if (*snr >= strong)712 led = 2;713 else714 led = 1;715 716 if ((state->led_state) &&717 (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10))718 /* snr didn't change enough to bother719 * changing the color of the led */720 return 0;721 722 return au8522_led_ctrl(state, led);723}724 725static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr)726{727 struct au8522_state *state = fe->demodulator_priv;728 int ret = -EINVAL;729 730 dprintk("%s()\n", __func__);731 732 if (state->current_modulation == QAM_256)733 ret = au8522_mse2snr_lookup(qam256_mse2snr_tab,734 ARRAY_SIZE(qam256_mse2snr_tab),735 au8522_readreg(state, 0x0522),736 snr);737 else if (state->current_modulation == QAM_64)738 ret = au8522_mse2snr_lookup(qam64_mse2snr_tab,739 ARRAY_SIZE(qam64_mse2snr_tab),740 au8522_readreg(state, 0x0522),741 snr);742 else /* VSB_8 */743 ret = au8522_mse2snr_lookup(vsb_mse2snr_tab,744 ARRAY_SIZE(vsb_mse2snr_tab),745 au8522_readreg(state, 0x0311),746 snr);747 748 if (state->config.led_cfg)749 au8522_led_status(state, snr);750 751 return ret;752}753 754static int au8522_read_signal_strength(struct dvb_frontend *fe,755 u16 *signal_strength)756{757 /* borrowed from lgdt330x.c758 *759 * Calculate strength from SNR up to 35dB760 * Even though the SNR can go higher than 35dB,761 * there is some comfort factor in having a range of762 * strong signals that can show at 100%763 */764 u16 snr;765 u32 tmp;766 int ret = au8522_read_snr(fe, &snr);767 768 *signal_strength = 0;769 770 if (0 == ret) {771 /* The following calculation method was chosen772 * purely for the sake of code re-use from the773 * other demod drivers that use this method */774 775 /* Convert from SNR in dB * 10 to 8.24 fixed-point */776 tmp = (snr * ((1 << 24) / 10));777 778 /* Convert from 8.24 fixed-point to779 * scale the range 0 - 35*2^24 into 0 - 65535*/780 if (tmp >= 8960 * 0x10000)781 *signal_strength = 0xffff;782 else783 *signal_strength = tmp / 8960;784 }785 786 return ret;787}788 789static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)790{791 struct au8522_state *state = fe->demodulator_priv;792 793 if (state->current_modulation == VSB_8)794 *ucblocks = au8522_readreg(state, 0x0087);795 else796 *ucblocks = au8522_readreg(state, 0x0543);797 798 return 0;799}800 801static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber)802{803 return au8522_read_ucblocks(fe, ber);804}805 806static int au8522_get_frontend(struct dvb_frontend *fe,807 struct dtv_frontend_properties *c)808{809 struct au8522_state *state = fe->demodulator_priv;810 811 c->frequency = state->current_frequency;812 c->modulation = state->current_modulation;813 814 return 0;815}816 817static int au8522_get_tune_settings(struct dvb_frontend *fe,818 struct dvb_frontend_tune_settings *tune)819{820 tune->min_delay_ms = 1000;821 return 0;822}823 824static const struct dvb_frontend_ops au8522_ops;825 826 827static void au8522_release(struct dvb_frontend *fe)828{829 struct au8522_state *state = fe->demodulator_priv;830 au8522_release_state(state);831}832 833struct dvb_frontend *au8522_attach(const struct au8522_config *config,834 struct i2c_adapter *i2c)835{836 struct au8522_state *state = NULL;837 int instance;838 839 /* allocate memory for the internal state */840 instance = au8522_get_state(&state, i2c, config->demod_address);841 switch (instance) {842 case 0:843 dprintk("%s state allocation failed\n", __func__);844 break;845 case 1:846 /* new demod instance */847 dprintk("%s using new instance\n", __func__);848 break;849 default:850 /* existing demod instance */851 dprintk("%s using existing instance\n", __func__);852 break;853 }854 855 /* setup the state */856 state->config = *config;857 state->i2c = i2c;858 state->operational_mode = AU8522_DIGITAL_MODE;859 860 /* create dvb_frontend */861 memcpy(&state->frontend.ops, &au8522_ops,862 sizeof(struct dvb_frontend_ops));863 state->frontend.demodulator_priv = state;864 865 state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl;866 867 if (au8522_init(&state->frontend) != 0) {868 printk(KERN_ERR "%s: Failed to initialize correctly\n",869 __func__);870 goto error;871 }872 873 /* Note: Leaving the I2C gate open here. */874 au8522_i2c_gate_ctrl(&state->frontend, 1);875 876 return &state->frontend;877 878error:879 au8522_release_state(state);880 return NULL;881}882EXPORT_SYMBOL_GPL(au8522_attach);883 884static const struct dvb_frontend_ops au8522_ops = {885 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },886 .info = {887 .name = "Auvitek AU8522 QAM/8VSB Frontend",888 .frequency_min_hz = 54 * MHz,889 .frequency_max_hz = 858 * MHz,890 .frequency_stepsize_hz = 62500,891 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB892 },893 894 .init = au8522_init,895 .sleep = au8522_sleep,896 .i2c_gate_ctrl = au8522_i2c_gate_ctrl,897 .set_frontend = au8522_set_frontend,898 .get_frontend = au8522_get_frontend,899 .get_tune_settings = au8522_get_tune_settings,900 .read_status = au8522_read_status,901 .read_ber = au8522_read_ber,902 .read_signal_strength = au8522_read_signal_strength,903 .read_snr = au8522_read_snr,904 .read_ucblocks = au8522_read_ucblocks,905 .release = au8522_release,906};907 908module_param(debug, int, 0644);909MODULE_PARM_DESC(debug, "Enable verbose debug messages");910 911module_param(zv_mode, int, 0644);912MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n"913 "\t\ton - modified AU8522 QAM256 initialization.\n"914 "\t\tProvides faster lock when using ZeeVee modulator based sources");915 916MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver");917MODULE_AUTHOR("Steven Toth");918MODULE_LICENSE("GPL");919