drivers/media/dvb/frontends/nxt2002.c

   1 /*
   2     Support for B2C2/BBTI Technisat Air2PC - ATSC
   3
   4     Copyright (C) 2004 Taylor Jacob <rtjacob@earthlink.net>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  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     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 /*
  23  * This driver needs external firmware. Please use the command
  24  * "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" to
  25  * download/extract it, and then copy it to /usr/lib/hotplug/firmware.
  26  */
  27 #define NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw"
  28 #define CRC_CCIT_MASK 0x1021
  29
  30 #include <linux/init.h>
  31 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/device.h>
  34 #include <linux/firmware.h>
  35
  36 #include "dvb_frontend.h"
  37 #include "nxt2002.h"
  38
  39 struct nxt2002_state {
  40
  41         struct i2c_adapter* i2c;
  42         struct dvb_frontend_ops ops;
  43         const struct nxt2002_config* config;
  44         struct dvb_frontend frontend;
  45
  46         /* demodulator private data */
  47         u8 initialised:1;
  48 };
  49
  50 static int debug;
  51 #define dprintk(args...) \
  52         do { \
  53                 if (debug) printk(KERN_DEBUG "nxt2002: " args); \
  54         } while (0)
  55
  56 static int i2c_writebytes (struct nxt2002_state* state, u8 reg, u8 *buf, u8 len)
  57 {
  58         /* probbably a much better way or doing this */
  59         u8 buf2 [256],x;
  60         int err;
  61         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 };
  62
  63         buf2[0] = reg;
  64         for (x = 0 ; x < len ; x++)
  65                 buf2[x+1] = buf[x];
  66
  67         if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
  68                 printk ("%s: i2c write error (addr %02x, err == %i)\n",
  69                         __FUNCTION__, state->config->demod_address, err);
  70                 return -EREMOTEIO;
  71         }
  72
  73         return 0;
  74 }
  75
  76 static u8 i2c_readbytes (struct nxt2002_state* state, u8 reg, u8* buf, u8 len)
  77 {
  78         u8 reg2 [] = { reg };
  79
  80         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = reg2, .len = 1 },
  81                         { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } };
  82
  83         int err;
  84
  85         if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
  86                 printk ("%s: i2c read error (addr %02x, err == %i)\n",
  87                         __FUNCTION__, state->config->demod_address, err);
  88                 return -EREMOTEIO;
  89         }
  90
  91         return 0;
  92 }
  93
  94 static u16 nxt2002_crc(u16 crc, u8 c)
  95 {
  96
  97         u8 i;
  98         u16 input = (u16) c & 0xFF;
  99
 100         input<<=8;
 101         for(i=0 ;i<8 ;i++) {
 102                 if((crc ^ input) & 0x8000)
 103                         crc=(crc<<1)^CRC_CCIT_MASK;
 104                 else
 105                         crc<<=1;
 106         input<<=1;
 107         }
 108         return crc;
 109 }
 110
 111 static int nxt2002_writereg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
 112 {
 113         u8 buf;
 114         dprintk("%s\n", __FUNCTION__);
 115
 116         /* set multi register length */
 117         i2c_writebytes(state,0x34,&len,1);
 118
 119         /* set mutli register register */
 120         i2c_writebytes(state,0x35,&reg,1);
 121
 122         /* send the actual data */
 123         i2c_writebytes(state,0x36,data,len);
 124
 125         /* toggle the multireg write bit*/
 126         buf = 0x02;
 127         i2c_writebytes(state,0x21,&buf,1);
 128
 129         i2c_readbytes(state,0x21,&buf,1);
 130
 131         if ((buf & 0x02) == 0)
 132                 return 0;
 133
 134         dprintk("Error writing multireg register %02X\n",reg);
 135
 136         return 0;
 137 }
 138
 139 static int nxt2002_readreg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
 140 {
 141         u8 len2;
 142         dprintk("%s\n", __FUNCTION__);
 143
 144         /* set multi register length */
 145         len2 = len & 0x80;
 146         i2c_writebytes(state,0x34,&len2,1);
 147
 148         /* set mutli register register */
 149         i2c_writebytes(state,0x35,&reg,1);
 150
 151         /* send the actual data */
 152         i2c_readbytes(state,reg,data,len);
 153
 154         return 0;
 155 }
 156
 157 static void nxt2002_microcontroller_stop (struct nxt2002_state* state)
 158 {
 159         u8 buf[2],counter = 0;
 160         dprintk("%s\n", __FUNCTION__);
 161
 162         buf[0] = 0x80;
 163         i2c_writebytes(state,0x22,buf,1);
 164
 165         while (counter < 20) {
 166                 i2c_readbytes(state,0x31,buf,1);
 167                 if (buf[0] & 0x40)
 168                         return;
 169                 msleep(10);
 170                 counter++;
 171         }
 172
 173         dprintk("Timeout waiting for micro to stop.. This is ok after firmware upload\n");
 174         return;
 175 }
 176
 177 static void nxt2002_microcontroller_start (struct nxt2002_state* state)
 178 {
 179         u8 buf;
 180         dprintk("%s\n", __FUNCTION__);
 181
 182         buf = 0x00;
 183         i2c_writebytes(state,0x22,&buf,1);
 184 }
 185
 186 static int nxt2002_writetuner (struct nxt2002_state* state, u8* data)
 187 {
 188         u8 buf,count = 0;
 189
 190         dprintk("Tuner Bytes: %02X %02X %02X %02X\n",data[0],data[1],data[2],data[3]);
 191
 192         dprintk("%s\n", __FUNCTION__);
 193         /* stop the micro first */
 194         nxt2002_microcontroller_stop(state);
 195
 196         /* set the i2c transfer speed to the tuner */
 197         buf = 0x03;
 198         i2c_writebytes(state,0x20,&buf,1);
 199
 200         /* setup to transfer 4 bytes via i2c */
 201         buf = 0x04;
 202         i2c_writebytes(state,0x34,&buf,1);
 203
 204         /* write actual tuner bytes */
 205         i2c_writebytes(state,0x36,data,4);
 206
 207         /* set tuner i2c address */
 208         buf = 0xC2;
 209         i2c_writebytes(state,0x35,&buf,1);
 210
 211         /* write UC Opmode to begin transfer */
 212         buf = 0x80;
 213         i2c_writebytes(state,0x21,&buf,1);
 214
 215         while (count < 20) {
 216                 i2c_readbytes(state,0x21,&buf,1);
 217                 if ((buf & 0x80)== 0x00)
 218                         return 0;
 219                 msleep(100);
 220                 count++;
 221         }
 222
 223         printk("nxt2002: timeout error writing tuner\n");
 224         return 0;
 225 }
 226
 227 static void nxt2002_agc_reset(struct nxt2002_state* state)
 228 {
 229         u8 buf;
 230         dprintk("%s\n", __FUNCTION__);
 231
 232         buf = 0x08;
 233         i2c_writebytes(state,0x08,&buf,1);
 234
 235         buf = 0x00;
 236         i2c_writebytes(state,0x08,&buf,1);
 237
 238         return;
 239 }
 240
 241 static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
 242 {
 243
 244         struct nxt2002_state* state = fe->demodulator_priv;
 245         u8 buf[256],written = 0,chunkpos = 0;
 246         u16 rambase,position,crc = 0;
 247
 248         dprintk("%s\n", __FUNCTION__);
 249         dprintk("Firmware is %zu bytes\n",fw->size);
 250
 251         /* Get the RAM base for this nxt2002 */
 252         i2c_readbytes(state,0x10,buf,1);
 253
 254         if (buf[0] & 0x10)
 255                 rambase = 0x1000;
 256         else
 257                 rambase = 0x0000;
 258
 259         dprintk("rambase on this nxt2002 is %04X\n",rambase);
 260
 261         /* Hold the micro in reset while loading firmware */
 262         buf[0] = 0x80;
 263         i2c_writebytes(state,0x2B,buf,1);
 264
 265         for (position = 0; position < fw->size ; position++) {
 266                 if (written == 0) {
 267                         crc = 0;
 268                         chunkpos = 0x28;
 269                         buf[0] = ((rambase + position) >> 8);
 270                         buf[1] = (rambase + position) & 0xFF;
 271                         buf[2] = 0x81;
 272                         /* write starting address */
 273                         i2c_writebytes(state,0x29,buf,3);
 274                 }
 275                 written++;
 276                 chunkpos++;
 277
 278                 if ((written % 4) == 0)
 279                         i2c_writebytes(state,chunkpos,&fw->data[position-3],4);
 280
 281                 crc = nxt2002_crc(crc,fw->data[position]);
 282
 283                 if ((written == 255) || (position+1 == fw->size)) {
 284                         /* write remaining bytes of firmware */
 285                         i2c_writebytes(state, chunkpos+4-(written %4),
 286                                 &fw->data[position-(written %4) + 1],
 287                                 written %4);
 288                         buf[0] = crc << 8;
 289                         buf[1] = crc & 0xFF;
 290
 291                         /* write crc */
 292                         i2c_writebytes(state,0x2C,buf,2);
 293
 294                         /* do a read to stop things */
 295                         i2c_readbytes(state,0x2A,buf,1);
 296
 297                         /* set transfer mode to complete */
 298                         buf[0] = 0x80;
 299                         i2c_writebytes(state,0x2B,buf,1);
 300
 301                         written = 0;
 302                 }
 303         }
 304
 305         printk ("done.\n");
 306         return 0;
 307 };
 308
 309 static int nxt2002_setup_frontend_parameters (struct dvb_frontend* fe,
 310                                              struct dvb_frontend_parameters *p)
 311 {
 312         struct nxt2002_state* state = fe->demodulator_priv;
 313         u32 freq = 0;
 314         u16 tunerfreq = 0;
 315         u8 buf[4];
 316
 317         freq = 44000 + ( p->frequency / 1000 );
 318
 319         dprintk("freq = %d      p->frequency = %d\n",freq,p->frequency);
 320
 321         tunerfreq = freq * 24/4000;
 322
 323         buf[0] = (tunerfreq >> 8) & 0x7F;
 324         buf[1] = (tunerfreq & 0xFF);
 325
 326         if (p->frequency <= 214000000) {
 327                 buf[2] = 0x84 + (0x06 << 3);
 328                 buf[3] = (p->frequency <= 172000000) ? 0x01 : 0x02;
 329         } else if (p->frequency <= 721000000) {
 330                 buf[2] = 0x84 + (0x07 << 3);
 331                 buf[3] = (p->frequency <= 467000000) ? 0x02 : 0x08;
 332         } else if (p->frequency <= 841000000) {
 333                 buf[2] = 0x84 + (0x0E << 3);
 334                 buf[3] = 0x08;
 335         } else {
 336                 buf[2] = 0x84 + (0x0F << 3);
 337                 buf[3] = 0x02;
 338         }
 339
 340         /* write frequency information */
 341         nxt2002_writetuner(state,buf);
 342
 343         /* reset the agc now that tuning has been completed */
 344         nxt2002_agc_reset(state);
 345
 346
 347
 348         /* set target power level */
 349         switch (p->u.vsb.modulation) {
 350                 case QAM_64:
 351                 case QAM_256:
 352                                 buf[0] = 0x74;
 353                                 break;
 354                 case VSB_8:
 355                                 buf[0] = 0x70;
 356                                 break;
 357                 default:
 358                                 return -EINVAL;
 359                                 break;
 360         }
 361         i2c_writebytes(state,0x42,buf,1);
 362
 363         /* configure sdm */
 364         buf[0] = 0x87;
 365         i2c_writebytes(state,0x57,buf,1);
 366
 367         /* write sdm1 input */
 368         buf[0] = 0x10;
 369         buf[1] = 0x00;
 370         nxt2002_writereg_multibyte(state,0x58,buf,2);
 371
 372         /* write sdmx input */
 373         switch (p->u.vsb.modulation) {
 374                 case QAM_64:
 375                                 buf[0] = 0x68;
 376                                 break;
 377                 case QAM_256:
 378                                 buf[0] = 0x64;
 379                                 break;
 380                 case VSB_8:
 381                                 buf[0] = 0x60;
 382                                 break;
 383                 default:
 384                                 return -EINVAL;
 385                                 break;
 386         }
 387         buf[1] = 0x00;
 388         nxt2002_writereg_multibyte(state,0x5C,buf,2);
 389
 390         /* write adc power lpf fc */
 391         buf[0] = 0x05;
 392         i2c_writebytes(state,0x43,buf,1);
 393
 394         /* write adc power lpf fc */
 395         buf[0] = 0x05;
 396         i2c_writebytes(state,0x43,buf,1);
 397
 398         /* write accumulator2 input */
 399         buf[0] = 0x80;
 400         buf[1] = 0x00;
 401         nxt2002_writereg_multibyte(state,0x4B,buf,2);
 402
 403         /* write kg1 */
 404         buf[0] = 0x00;
 405         i2c_writebytes(state,0x4D,buf,1);
 406
 407         /* write sdm12 lpf fc */
 408         buf[0] = 0x44;
 409         i2c_writebytes(state,0x55,buf,1);
 410
 411         /* write agc control reg */
 412         buf[0] = 0x04;
 413         i2c_writebytes(state,0x41,buf,1);
 414
 415         /* write agc ucgp0 */
 416         switch (p->u.vsb.modulation) {
 417                 case QAM_64:
 418                                 buf[0] = 0x02;
 419                                 break;
 420                 case QAM_256:
 421                                 buf[0] = 0x03;
 422                                 break;
 423                 case VSB_8:
 424                                 buf[0] = 0x00;
 425                                 break;
 426                 default:
 427                                 return -EINVAL;
 428                                 break;
 429         }
 430         i2c_writebytes(state,0x30,buf,1);
 431
 432         /* write agc control reg */
 433         buf[0] = 0x00;
 434         i2c_writebytes(state,0x41,buf,1);
 435
 436         /* write accumulator2 input */
 437         buf[0] = 0x80;
 438         buf[1] = 0x00;
 439         nxt2002_writereg_multibyte(state,0x49,buf,2);
 440         nxt2002_writereg_multibyte(state,0x4B,buf,2);
 441
 442         /* write agc control reg */
 443         buf[0] = 0x04;
 444         i2c_writebytes(state,0x41,buf,1);
 445
 446         nxt2002_microcontroller_start(state);
 447
 448         /* adjacent channel detection should be done here, but I don't
 449         have any stations with this need so I cannot test it */
 450
 451         return 0;
 452 }
 453
 454 static int nxt2002_read_status(struct dvb_frontend* fe, fe_status_t* status)
 455 {
 456         struct nxt2002_state* state = fe->demodulator_priv;
 457         u8 lock;
 458         i2c_readbytes(state,0x31,&lock,1);
 459
 460         *status = 0;
 461         if (lock & 0x20) {
 462                 *status |= FE_HAS_SIGNAL;
 463                 *status |= FE_HAS_CARRIER;
 464                 *status |= FE_HAS_VITERBI;
 465                 *status |= FE_HAS_SYNC;
 466                 *status |= FE_HAS_LOCK;
 467         }
 468         return 0;
 469 }
 470
 471 static int nxt2002_read_ber(struct dvb_frontend* fe, u32* ber)
 472 {
 473         struct nxt2002_state* state = fe->demodulator_priv;
 474         u8 b[3];
 475
 476         nxt2002_readreg_multibyte(state,0xE6,b,3);
 477
 478         *ber = ((b[0] << 8) + b[1]) * 8;
 479
 480         return 0;
 481 }
 482
 483 static int nxt2002_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 484 {
 485         struct nxt2002_state* state = fe->demodulator_priv;
 486         u8 b[2];
 487         u16 temp = 0;
 488
 489         /* setup to read cluster variance */
 490         b[0] = 0x00;
 491         i2c_writebytes(state,0xA1,b,1);
 492
 493         /* get multreg val */
 494         nxt2002_readreg_multibyte(state,0xA6,b,2);
 495
 496         temp = (b[0] << 8) | b[1];
 497         *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
 498
 499         return 0;
 500 }
 501
 502 static int nxt2002_read_snr(struct dvb_frontend* fe, u16* snr)
 503 {
 504
 505         struct nxt2002_state* state = fe->demodulator_priv;
 506         u8 b[2];
 507         u16 temp = 0, temp2;
 508         u32 snrdb = 0;
 509
 510         /* setup to read cluster variance */
 511         b[0] = 0x00;
 512         i2c_writebytes(state,0xA1,b,1);
 513
 514         /* get multreg val from 0xA6 */
 515         nxt2002_readreg_multibyte(state,0xA6,b,2);
 516
 517         temp = (b[0] << 8) | b[1];
 518         temp2 = 0x7FFF - temp;
 519
 520         /* snr will be in db */
 521         if (temp2 > 0x7F00)
 522                 snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
 523         else if (temp2 > 0x7EC0)
 524                 snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
 525         else if (temp2 > 0x7C00)
 526                 snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
 527         else
 528                 snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
 529
 530         /* the value reported back from the frontend will be FFFF=32db 0000=0db */
 531
 532         *snr = snrdb * (0xFFFF/32000);
 533
 534         return 0;
 535 }
 536
 537 static int nxt2002_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 538 {
 539         struct nxt2002_state* state = fe->demodulator_priv;
 540         u8 b[3];
 541
 542         nxt2002_readreg_multibyte(state,0xE6,b,3);
 543         *ucblocks = b[2];
 544
 545         return 0;
 546 }
 547
 548 static int nxt2002_sleep(struct dvb_frontend* fe)
 549 {
 550         return 0;
 551 }
 552
 553 static int nxt2002_init(struct dvb_frontend* fe)
 554 {
 555         struct nxt2002_state* state = fe->demodulator_priv;
 556         const struct firmware *fw;
 557         int ret;
 558         u8 buf[2];
 559
 560         if (!state->initialised) {
 561                 /* request the firmware, this will block until someone uploads it */
 562                 printk("nxt2002: Waiting for firmware upload (%s)...\n", NXT2002_DEFAULT_FIRMWARE);
 563                 ret = state->config->request_firmware(fe, &fw, NXT2002_DEFAULT_FIRMWARE);
 564                 printk("nxt2002: Waiting for firmware upload(2)...\n");
 565                 if (ret) {
 566                         printk("nxt2002: no firmware upload (timeout or file not found?)\n");
 567                         return ret;
 568                 }
 569
 570                 ret = nxt2002_load_firmware(fe, fw);
 571                 if (ret) {
 572                         printk("nxt2002: writing firmware to device failed\n");
 573                         release_firmware(fw);
 574                         return ret;
 575                 }
 576                 printk("nxt2002: firmware upload complete\n");
 577
 578                 /* Put the micro into reset */
 579                 nxt2002_microcontroller_stop(state);
 580
 581                 /* ensure transfer is complete */
 582                 buf[0]=0;
 583                 i2c_writebytes(state,0x2B,buf,1);
 584
 585                 /* Put the micro into reset for real this time */
 586                 nxt2002_microcontroller_stop(state);
 587
 588                 /* soft reset everything (agc,frontend,eq,fec)*/
 589                 buf[0] = 0x0F;
 590                 i2c_writebytes(state,0x08,buf,1);
 591                 buf[0] = 0x00;
 592                 i2c_writebytes(state,0x08,buf,1);
 593
 594                 /* write agc sdm configure */
 595                 buf[0] = 0xF1;
 596                 i2c_writebytes(state,0x57,buf,1);
 597
 598                 /* write mod output format */
 599                 buf[0] = 0x20;
 600                 i2c_writebytes(state,0x09,buf,1);
 601
 602                 /* write fec mpeg mode */
 603                 buf[0] = 0x7E;
 604                 buf[1] = 0x00;
 605                 i2c_writebytes(state,0xE9,buf,2);
 606
 607                 /* write mux selection */
 608                 buf[0] = 0x00;
 609                 i2c_writebytes(state,0xCC,buf,1);
 610
 611                 state->initialised = 1;
 612         }
 613
 614         return 0;
 615 }
 616
 617 static int nxt2002_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 618 {
 619         fesettings->min_delay_ms = 500;
 620         fesettings->step_size = 0;
 621         fesettings->max_drift = 0;
 622         return 0;
 623 }
 624
 625 static void nxt2002_release(struct dvb_frontend* fe)
 626 {
 627         struct nxt2002_state* state = fe->demodulator_priv;
 628         kfree(state);
 629 }
 630
 631 static struct dvb_frontend_ops nxt2002_ops;
 632
 633 struct dvb_frontend* nxt2002_attach(const struct nxt2002_config* config,
 634                                    struct i2c_adapter* i2c)
 635 {
 636         struct nxt2002_state* state = NULL;
 637         u8 buf [] = {0,0,0,0,0};
 638
 639         /* allocate memory for the internal state */
 640         state = kmalloc(sizeof(struct nxt2002_state), GFP_KERNEL);
 641         if (state == NULL) goto error;
 642
 643         /* setup the state */
 644         state->config = config;
 645         state->i2c = i2c;
 646         memcpy(&state->ops, &nxt2002_ops, sizeof(struct dvb_frontend_ops));
 647         state->initialised = 0;
 648
 649         /* Check the first 5 registers to ensure this a revision we can handle */
 650
 651         i2c_readbytes(state, 0x00, buf, 5);
 652         if (buf[0] != 0x04) goto error;         /* device id */
 653         if (buf[1] != 0x02) goto error;         /* fab id */
 654         if (buf[2] != 0x11) goto error;         /* month */
 655         if (buf[3] != 0x20) goto error;         /* year msb */
 656         if (buf[4] != 0x00) goto error;         /* year lsb */
 657
 658         /* create dvb_frontend */
 659         state->frontend.ops = &state->ops;
 660         state->frontend.demodulator_priv = state;
 661         return &state->frontend;
 662
 663 error:
 664         kfree(state);
 665         return NULL;
 666 }
 667
 668 static struct dvb_frontend_ops nxt2002_ops = {
 669
 670         .info = {
 671                 .name = "Nextwave nxt2002 VSB/QAM frontend",
 672                 .type = FE_ATSC,
 673                 .frequency_min =  54000000,
 674                 .frequency_max = 860000000,
 675                 /* stepsize is just a guess */
 676                 .frequency_stepsize = 166666,
 677                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 678                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 679                         FE_CAN_8VSB | FE_CAN_QAM_64 | FE_CAN_QAM_256
 680         },
 681
 682         .release = nxt2002_release,
 683
 684         .init = nxt2002_init,
 685         .sleep = nxt2002_sleep,
 686
 687         .set_frontend = nxt2002_setup_frontend_parameters,
 688         .get_tune_settings = nxt2002_get_tune_settings,
 689
 690         .read_status = nxt2002_read_status,
 691         .read_ber = nxt2002_read_ber,
 692         .read_signal_strength = nxt2002_read_signal_strength,
 693         .read_snr = nxt2002_read_snr,
 694         .read_ucblocks = nxt2002_read_ucblocks,
 695
 696 };
 697
 698 module_param(debug, int, 0644);
 699 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 700
 701 MODULE_DESCRIPTION("NXT2002 ATSC (8VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
 702 MODULE_AUTHOR("Taylor Jacob");
 703 MODULE_LICENSE("GPL");
 704
 705 EXPORT_SYMBOL(nxt2002_attach);