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 = (struct nxt2002_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
 255         if (buf[0] & 0x10)
 256                 rambase = 0x1000;
 257         else
 258                 rambase = 0x0000;
 259
 260         dprintk("rambase on this nxt2002 is %04X\n",rambase);
 261
 262         /* Hold the micro in reset while loading firmware */
 263         buf[0] = 0x80;
 264         i2c_writebytes(state,0x2B,buf,1);
 265
 266
 267         for (position = 0; position < fw->size ; position++) {
 268                 if (written == 0) {
 269                         crc = 0;
 270                         chunkpos = 0x28;
 271                         buf[0] = ((rambase + position) >> 8);
 272                         buf[1] = (rambase + position) & 0xFF;
 273                         buf[2] = 0x81;
 274                         /* write starting address */
 275                         i2c_writebytes(state,0x29,buf,3);
 276                 }
 277                 written++;
 278                 chunkpos++;
 279
 280                 if ((written % 4) == 0)
 281                         i2c_writebytes(state,chunkpos,&fw->data[position-3],4);
 282
 283                 crc = nxt2002_crc(crc,fw->data[position]);
 284
 285
 286                 if ((written == 255) || (position+1 == fw->size)) {
 287                         /* write remaining bytes of firmware */
 288                         i2c_writebytes(state, chunkpos+4-(written %4),
 289                                 &fw->data[position-(written %4) + 1],
 290                                 written %4);
 291                         buf[0] = crc << 8;
 292                         buf[1] = crc & 0xFF;
 293
 294                         /* write crc */
 295                         i2c_writebytes(state,0x2C,buf,2);
 296
 297                         /* do a read to stop things */
 298                         i2c_readbytes(state,0x2A,buf,1);
 299
 300                         /* set transfer mode to complete */
 301                         buf[0] = 0x80;
 302                         i2c_writebytes(state,0x2B,buf,1);
 303
 304                         written = 0;
 305                 }
 306         }
 307
 308         printk ("done.\n");
 309         return 0;
 310 };
 311
 312
 313 static int nxt2002_setup_frontend_parameters (struct dvb_frontend* fe,
 314                                              struct dvb_frontend_parameters *p)
 315 {
 316         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 317         u32 freq = 0;
 318         u16 tunerfreq = 0;
 319         u8 buf[4];
 320
 321         freq = 44000 + ( p->frequency / 1000 );
 322
 323         dprintk("freq = %d      p->frequency = %d\n",freq,p->frequency);
 324
 325         tunerfreq = freq * 24/4000;
 326
 327         buf[0] = (tunerfreq >> 8) & 0x7F;
 328         buf[1] = (tunerfreq & 0xFF);
 329
 330         if (p->frequency <= 214000000) {
 331                 buf[2] = 0x84 + (0x06 << 3);
 332                 buf[3] = (p->frequency <= 172000000) ? 0x01 : 0x02;
 333         } else if (p->frequency <= 721000000) {
 334                 buf[2] = 0x84 + (0x07 << 3);
 335                 buf[3] = (p->frequency <= 467000000) ? 0x02 : 0x08;
 336         } else if (p->frequency <= 841000000) {
 337                 buf[2] = 0x84 + (0x0E << 3);
 338                 buf[3] = 0x08;
 339         } else {
 340                 buf[2] = 0x84 + (0x0F << 3);
 341                 buf[3] = 0x02;
 342         }
 343
 344         /* write frequency information */
 345         nxt2002_writetuner(state,buf);
 346
 347         /* reset the agc now that tuning has been completed */
 348         nxt2002_agc_reset(state);
 349
 350         /* set target power level */
 351         buf[0] = 0x70;
 352         i2c_writebytes(state,0x42,buf,1);
 353
 354         /* configure sdm */
 355         buf[0] = 0x87;
 356         i2c_writebytes(state,0x57,buf,1);
 357
 358         /* write sdm1 input */
 359         buf[0] = 0x10;
 360         buf[1] = 0x00;
 361         nxt2002_writereg_multibyte(state,0x58,buf,2);
 362
 363         /* write sdmx input */
 364         buf[0] = 0x60;
 365         buf[1] = 0x00;
 366         nxt2002_writereg_multibyte(state,0x5C,buf,2);
 367
 368         /* write adc power lpf fc */
 369         buf[0] = 0x05;
 370         i2c_writebytes(state,0x43,buf,1);
 371
 372         /* write adc power lpf fc */
 373         buf[0] = 0x05;
 374         i2c_writebytes(state,0x43,buf,1);
 375
 376         /* write accumulator2 input */
 377         buf[0] = 0x80;
 378         buf[1] = 0x00;
 379         nxt2002_writereg_multibyte(state,0x4B,buf,2);
 380
 381         /* write kg1 */
 382         buf[0] = 0x00;
 383         i2c_writebytes(state,0x4D,buf,1);
 384
 385         /* write sdm12 lpf fc */
 386         buf[0] = 0x44;
 387         i2c_writebytes(state,0x55,buf,1);
 388
 389         /* write agc control reg */
 390         buf[0] = 0x04;
 391         i2c_writebytes(state,0x41,buf,1);
 392
 393         /* write agc ucgp0 */
 394         buf[0] = 0x00;
 395         i2c_writebytes(state,0x30,buf,1);
 396
 397         /* write agc control reg */
 398         buf[0] = 0x00;
 399         i2c_writebytes(state,0x41,buf,1);
 400
 401         /* write accumulator2 input */
 402         buf[0] = 0x80;
 403         buf[1] = 0x00;
 404         nxt2002_writereg_multibyte(state,0x49,buf,2);
 405         nxt2002_writereg_multibyte(state,0x4B,buf,2);
 406
 407         /* write agc control reg */
 408         buf[0] = 0x04;
 409         i2c_writebytes(state,0x41,buf,1);
 410
 411         nxt2002_microcontroller_start(state);
 412
 413         /* adjacent channel detection should be done here, but I don't
 414         have any stations with this need so I cannot test it */
 415
 416         return 0;
 417 }
 418
 419 static int nxt2002_read_status(struct dvb_frontend* fe, fe_status_t* status)
 420 {
 421         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 422         u8 lock;
 423         i2c_readbytes(state,0x31,&lock,1);
 424
 425         *status = 0;
 426         if (lock & 0x20) {
 427                 *status |= FE_HAS_SIGNAL;
 428                 *status |= FE_HAS_CARRIER;
 429                 *status |= FE_HAS_VITERBI;
 430                 *status |= FE_HAS_SYNC;
 431                 *status |= FE_HAS_LOCK;
 432         }
 433         return 0;
 434 }
 435
 436 static int nxt2002_read_ber(struct dvb_frontend* fe, u32* ber)
 437 {
 438         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 439         u8 b[3];
 440
 441         nxt2002_readreg_multibyte(state,0xE6,b,3);
 442
 443         *ber = ((b[0] << 8) + b[1]) * 8;
 444
 445         return 0;
 446 }
 447
 448 static int nxt2002_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 449 {
 450         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 451         u8 b[2];
 452         u16 temp = 0;
 453
 454         /* setup to read cluster variance */
 455         b[0] = 0x00;
 456         i2c_writebytes(state,0xA1,b,1);
 457
 458         /* get multreg val */
 459         nxt2002_readreg_multibyte(state,0xA6,b,2);
 460
 461         temp = (b[0] << 8) | b[1];
 462         *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
 463
 464         return 0;
 465 }
 466
 467 static int nxt2002_read_snr(struct dvb_frontend* fe, u16* snr)
 468 {
 469
 470         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 471         u8 b[2];
 472         u16 temp = 0, temp2;
 473         u32 snrdb = 0;
 474
 475         /* setup to read cluster variance */
 476         b[0] = 0x00;
 477         i2c_writebytes(state,0xA1,b,1);
 478
 479         /* get multreg val from 0xA6 */
 480         nxt2002_readreg_multibyte(state,0xA6,b,2);
 481
 482         temp = (b[0] << 8) | b[1];
 483         temp2 = 0x7FFF - temp;
 484
 485         /* snr will be in db */
 486         if (temp2 > 0x7F00)
 487                 snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
 488         else if (temp2 > 0x7EC0)
 489                 snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
 490         else if (temp2 > 0x7C00)
 491                 snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
 492         else
 493                 snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
 494
 495         /* the value reported back from the frontend will be FFFF=32db 0000=0db */
 496
 497         *snr = snrdb * (0xFFFF/32000);
 498
 499         return 0;
 500 }
 501
 502 static int nxt2002_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 503 {
 504         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 505         u8 b[3];
 506
 507         nxt2002_readreg_multibyte(state,0xE6,b,3);
 508
 509         *ucblocks = b[2];
 510
 511         return 0;
 512 }
 513
 514 static int nxt2002_sleep(struct dvb_frontend* fe)
 515 {
 516         return 0;
 517 }
 518
 519 static int nxt2002_init(struct dvb_frontend* fe)
 520 {
 521         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 522         const struct firmware *fw;
 523         int ret;
 524         u8 buf[2];
 525
 526         if (!state->initialised) {
 527                 /* request the firmware, this will block until someone uploads it */
 528                 printk("nxt2002: Waiting for firmware upload...\n");
 529                 ret = state->config->request_firmware(fe, &fw, NXT2002_DEFAULT_FIRMWARE);
 530                 printk("nxt2002: Waiting for firmware upload(2)...\n");
 531                 if (ret) {
 532                         printk("nxt2002: no firmware upload (timeout or file not found?)\n");
 533                         return ret;
 534                 }
 535
 536                 ret = nxt2002_load_firmware(fe, fw);
 537                 if (ret) {
 538                         printk("nxt2002: writing firmware to device failed\n");
 539                         release_firmware(fw);
 540                         return ret;
 541                 }
 542
 543                 /* Put the micro into reset */
 544                 nxt2002_microcontroller_stop(state);
 545
 546                 /* ensure transfer is complete */
 547                 buf[0]=0;
 548                 i2c_writebytes(state,0x2B,buf,1);
 549
 550                 /* Put the micro into reset for real this time */
 551                 nxt2002_microcontroller_stop(state);
 552
 553                 /* soft reset everything (agc,frontend,eq,fec)*/
 554                 buf[0] = 0x0F;
 555                 i2c_writebytes(state,0x08,buf,1);
 556                 buf[0] = 0x00;
 557                 i2c_writebytes(state,0x08,buf,1);
 558
 559                 /* write agc sdm configure */
 560                 buf[0] = 0xF1;
 561                 i2c_writebytes(state,0x57,buf,1);
 562
 563                 /* write mod output format */
 564                 buf[0] = 0x20;
 565                 i2c_writebytes(state,0x09,buf,1);
 566
 567                 /* write fec mpeg mode */
 568                 buf[0] = 0x7E;
 569                 buf[1] = 0x00;
 570                 i2c_writebytes(state,0xE9,buf,2);
 571
 572                 /* write mux selection */
 573                 buf[0] = 0x00;
 574                 i2c_writebytes(state,0xCC,buf,1);
 575
 576                 state->initialised = 1;
 577         }
 578
 579         return 0;
 580 }
 581
 582 static int nxt2002_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
 583 {
 584         fesettings->min_delay_ms = 500;
 585         fesettings->step_size = 0;
 586         fesettings->max_drift = 0;
 587         return 0;
 588 }
 589
 590 static void nxt2002_release(struct dvb_frontend* fe)
 591 {
 592         struct nxt2002_state* state = (struct nxt2002_state*) fe->demodulator_priv;
 593         kfree(state);
 594 }
 595
 596 static struct dvb_frontend_ops nxt2002_ops;
 597
 598 struct dvb_frontend* nxt2002_attach(const struct nxt2002_config* config,
 599                                    struct i2c_adapter* i2c)
 600 {
 601         struct nxt2002_state* state = NULL;
 602         u8 buf [] = {0,0,0,0,0};
 603
 604         /* allocate memory for the internal state */
 605         state = (struct nxt2002_state*) kmalloc(sizeof(struct nxt2002_state), GFP_KERNEL);
 606         if (state == NULL) goto error;
 607
 608         /* setup the state */
 609         state->config = config;
 610         state->i2c = i2c;
 611         memcpy(&state->ops, &nxt2002_ops, sizeof(struct dvb_frontend_ops));
 612         state->initialised = 0;
 613
 614         /* Check the first 5 registers to ensure this a revision we can handle */
 615
 616         i2c_readbytes(state, 0x00, buf, 5);
 617         if (buf[0] != 0x04) goto error;                 /* device id */
 618         if (buf[1] != 0x02) goto error;                 /* fab id */
 619         if (buf[2] != 0x11) goto error;                 /* month */
 620         if (buf[3] != 0x20) goto error;                 /* year msb */
 621         if (buf[4] != 0x00) goto error;                 /* year lsb */
 622
 623         /* create dvb_frontend */
 624         state->frontend.ops = &state->ops;
 625         state->frontend.demodulator_priv = state;
 626         return &state->frontend;
 627
 628 error:
 629         if (state) kfree(state);
 630         return NULL;
 631 }
 632
 633 static struct dvb_frontend_ops nxt2002_ops = {
 634
 635         .info = {
 636                 .name = "Nextwave nxt2002 VSB/QAM frontend",
 637                 .type = FE_ATSC,
 638                 .frequency_min =  54000000,
 639                 .frequency_max = 803000000,
 640                 /* stepsize is just a guess */
 641                 .frequency_stepsize = 166666,
 642                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 643                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 644                         FE_CAN_8VSB
 645         },
 646
 647         .release = nxt2002_release,
 648
 649         .init = nxt2002_init,
 650         .sleep = nxt2002_sleep,
 651
 652         .set_frontend = nxt2002_setup_frontend_parameters,
 653         .get_tune_settings = nxt2002_get_tune_settings,
 654
 655         .read_status = nxt2002_read_status,
 656         .read_ber = nxt2002_read_ber,
 657         .read_signal_strength = nxt2002_read_signal_strength,
 658         .read_snr = nxt2002_read_snr,
 659         .read_ucblocks = nxt2002_read_ucblocks,
 660
 661 };
 662
 663 module_param(debug, int, 0644);
 664 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 665
 666 MODULE_DESCRIPTION("NXT2002 ATSC (8VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
 667 MODULE_AUTHOR("Taylor Jacob");
 668 MODULE_LICENSE("GPL");
 669
 670 EXPORT_SYMBOL(nxt2002_attach);