git.oblomov.eu Git - linux-2.6/blob - drivers/media/common/tuners/mt20xx.c

   1 /*
   2  * i2c tv tuner chip device driver
   3  * controls microtune tuners, mt2032 + mt2050 at the moment.
   4  *
   5  * This "mt20xx" module was split apart from the original "tuner" module.
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/i2c.h>
   9 #include <linux/videodev2.h>
  10 #include "tuner-i2c.h"
  11 #include "mt20xx.h"
  12
  13 static int debug;
  14 module_param(debug, int, 0644);
  15 MODULE_PARM_DESC(debug, "enable verbose debug messages");
  16
  17 /* ---------------------------------------------------------------------- */
  18
  19 static unsigned int optimize_vco  = 1;
  20 module_param(optimize_vco,      int, 0644);
  21
  22 static unsigned int tv_antenna    = 1;
  23 module_param(tv_antenna,        int, 0644);
  24
  25 static unsigned int radio_antenna;
  26 module_param(radio_antenna,     int, 0644);
  27
  28 /* ---------------------------------------------------------------------- */
  29
  30 #define MT2032 0x04
  31 #define MT2030 0x06
  32 #define MT2040 0x07
  33 #define MT2050 0x42
  34
  35 static char *microtune_part[] = {
  36         [ MT2030 ] = "MT2030",
  37         [ MT2032 ] = "MT2032",
  38         [ MT2040 ] = "MT2040",
  39         [ MT2050 ] = "MT2050",
  40 };
  41
  42 struct microtune_priv {
  43         struct tuner_i2c_props i2c_props;
  44
  45         unsigned int xogc;
  46         //unsigned int radio_if2;
  47
  48         u32 frequency;
  49 };
  50
  51 static int microtune_release(struct dvb_frontend *fe)
  52 {
  53         kfree(fe->tuner_priv);
  54         fe->tuner_priv = NULL;
  55
  56         return 0;
  57 }
  58
  59 static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)
  60 {
  61         struct microtune_priv *priv = fe->tuner_priv;
  62         *frequency = priv->frequency;
  63         return 0;
  64 }
  65
  66 // IsSpurInBand()?
  67 static int mt2032_spurcheck(struct dvb_frontend *fe,
  68                             int f1, int f2, int spectrum_from,int spectrum_to)
  69 {
  70         struct microtune_priv *priv = fe->tuner_priv;
  71         int n1=1,n2,f;
  72
  73         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  74         f2=f2/1000;
  75         spectrum_from/=1000;
  76         spectrum_to/=1000;
  77
  78         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  79                   f1,f2,spectrum_from,spectrum_to);
  80
  81         do {
  82             n2=-n1;
  83             f=n1*(f1-f2);
  84             do {
  85                 n2--;
  86                 f=f-f2;
  87                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  88
  89                 if( (f>spectrum_from) && (f<spectrum_to))
  90                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  91             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  92             n1++;
  93         } while (n1<5);
  94
  95         return 1;
  96 }
  97
  98 static int mt2032_compute_freq(struct dvb_frontend *fe,
  99                                unsigned int rfin,
 100                                unsigned int if1, unsigned int if2,
 101                                unsigned int spectrum_from,
 102                                unsigned int spectrum_to,
 103                                unsigned char *buf,
 104                                int *ret_sel,
 105                                unsigned int xogc) //all in Hz
 106 {
 107         struct microtune_priv *priv = fe->tuner_priv;
 108         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
 109                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
 110
 111         fref= 5250 *1000; //5.25MHz
 112         desired_lo1=rfin+if1;
 113
 114         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
 115         lo1n=lo1/8;
 116         lo1a=lo1-(lo1n*8);
 117
 118         s=rfin/1000/1000+1090;
 119
 120         if(optimize_vco) {
 121                 if(s>1890) sel=0;
 122                 else if(s>1720) sel=1;
 123                 else if(s>1530) sel=2;
 124                 else if(s>1370) sel=3;
 125                 else sel=4; // >1090
 126         }
 127         else {
 128                 if(s>1790) sel=0; // <1958
 129                 else if(s>1617) sel=1;
 130                 else if(s>1449) sel=2;
 131                 else if(s>1291) sel=3;
 132                 else sel=4; // >1090
 133         }
 134         *ret_sel=sel;
 135
 136         lo1freq=(lo1a+8*lo1n)*fref;
 137
 138         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 139                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 140
 141         desired_lo2=lo1freq-rfin-if2;
 142         lo2=(desired_lo2)/fref;
 143         lo2n=lo2/8;
 144         lo2a=lo2-(lo2n*8);
 145         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 146         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 147
 148         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 149                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 150
 151         if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 ||
 152                         lo2n > 30) {
 153                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 154                            lo1a, lo1n, lo2a,lo2n);
 155                 return(-1);
 156         }
 157
 158         mt2032_spurcheck(fe, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 159         // should recalculate lo1 (one step up/down)
 160
 161         // set up MT2032 register map for transfer over i2c
 162         buf[0]=lo1n-1;
 163         buf[1]=lo1a | (sel<<4);
 164         buf[2]=0x86; // LOGC
 165         buf[3]=0x0f; //reserved
 166         buf[4]=0x1f;
 167         buf[5]=(lo2n-1) | (lo2a<<5);
 168         if(rfin >400*1000*1000)
 169                 buf[6]=0xe4;
 170         else
 171                 buf[6]=0xf4; // set PKEN per rev 1.2
 172         buf[7]=8+xogc;
 173         buf[8]=0xc3; //reserved
 174         buf[9]=0x4e; //reserved
 175         buf[10]=0xec; //reserved
 176         buf[11]=(lo2num&0xff);
 177         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 178
 179         return 0;
 180 }
 181
 182 static int mt2032_check_lo_lock(struct dvb_frontend *fe)
 183 {
 184         struct microtune_priv *priv = fe->tuner_priv;
 185         int try,lock=0;
 186         unsigned char buf[2];
 187
 188         for(try=0;try<10;try++) {
 189                 buf[0]=0x0e;
 190                 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 191                 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 192                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 193                 lock=buf[0] &0x06;
 194
 195                 if (lock==6)
 196                         break;
 197
 198                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 199                 udelay(1000);
 200         }
 201         return lock;
 202 }
 203
 204 static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock)
 205 {
 206         struct microtune_priv *priv = fe->tuner_priv;
 207         unsigned char buf[2];
 208         int tad1;
 209
 210         buf[0]=0x0f;
 211         tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 212         tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 213         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 214         tad1=buf[0]&0x07;
 215
 216         if(tad1 ==0) return lock;
 217         if(tad1 ==1) return lock;
 218
 219         if(tad1==2) {
 220                 if(sel==0)
 221                         return lock;
 222                 else sel--;
 223         }
 224         else {
 225                 if(sel<4)
 226                         sel++;
 227                 else
 228                         return lock;
 229         }
 230
 231         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 232
 233         buf[0]=0x0f;
 234         buf[1]=sel;
 235         tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 236         lock=mt2032_check_lo_lock(fe);
 237         return lock;
 238 }
 239
 240
 241 static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin,
 242                                unsigned int if1, unsigned int if2,
 243                                unsigned int from, unsigned int to)
 244 {
 245         unsigned char buf[21];
 246         int lint_try,ret,sel,lock=0;
 247         struct microtune_priv *priv = fe->tuner_priv;
 248
 249         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 250                   rfin,if1,if2,from,to);
 251
 252         buf[0]=0;
 253         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 254         tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
 255
 256         buf[0]=0;
 257         ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
 258         if (ret<0)
 259                 return;
 260
 261         // send only the relevant registers per Rev. 1.2
 262         buf[0]=0;
 263         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4);
 264         buf[5]=5;
 265         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4);
 266         buf[11]=11;
 267         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3);
 268         if(ret!=3)
 269                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 270
 271         // wait for PLLs to lock (per manual), retry LINT if not.
 272         for(lint_try=0; lint_try<2; lint_try++) {
 273                 lock=mt2032_check_lo_lock(fe);
 274
 275                 if(optimize_vco)
 276                         lock=mt2032_optimize_vco(fe,sel,lock);
 277                 if(lock==6) break;
 278
 279                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 280                 buf[0]=7;
 281                 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
 282                 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 283                 mdelay(10);
 284                 buf[1]=8+priv->xogc;
 285                 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 286         }
 287
 288         if (lock!=6)
 289                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 290
 291         buf[0]=2;
 292         buf[1]=0x20; // LOGC for optimal phase noise
 293         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 294         if (ret!=2)
 295                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 296 }
 297
 298
 299 static int mt2032_set_tv_freq(struct dvb_frontend *fe,
 300                               struct analog_parameters *params)
 301 {
 302         int if2,from,to;
 303
 304         // signal bandwidth and picture carrier
 305         if (params->std & V4L2_STD_525_60) {
 306                 // NTSC
 307                 from = 40750*1000;
 308                 to   = 46750*1000;
 309                 if2  = 45750*1000;
 310         } else {
 311                 // PAL
 312                 from = 32900*1000;
 313                 to   = 39900*1000;
 314                 if2  = 38900*1000;
 315         }
 316
 317         mt2032_set_if_freq(fe, params->frequency*62500,
 318                            1090*1000*1000, if2, from, to);
 319
 320         return 0;
 321 }
 322
 323 static int mt2032_set_radio_freq(struct dvb_frontend *fe,
 324                                  struct analog_parameters *params)
 325 {
 326         struct microtune_priv *priv = fe->tuner_priv;
 327         int if2;
 328
 329         if (params->std & V4L2_STD_525_60) {
 330                 tuner_dbg("pinnacle ntsc\n");
 331                 if2 = 41300 * 1000;
 332         } else {
 333                 tuner_dbg("pinnacle pal\n");
 334                 if2 = 33300 * 1000;
 335         }
 336
 337         // per Manual for FM tuning: first if center freq. 1085 MHz
 338         mt2032_set_if_freq(fe, params->frequency * 125 / 2,
 339                            1085*1000*1000,if2,if2,if2);
 340
 341         return 0;
 342 }
 343
 344 static int mt2032_set_params(struct dvb_frontend *fe,
 345                              struct analog_parameters *params)
 346 {
 347         struct microtune_priv *priv = fe->tuner_priv;
 348         int ret = -EINVAL;
 349
 350         switch (params->mode) {
 351         case V4L2_TUNER_RADIO:
 352                 ret = mt2032_set_radio_freq(fe, params);
 353                 priv->frequency = params->frequency * 125 / 2;
 354                 break;
 355         case V4L2_TUNER_ANALOG_TV:
 356         case V4L2_TUNER_DIGITAL_TV:
 357                 ret = mt2032_set_tv_freq(fe, params);
 358                 priv->frequency = params->frequency * 62500;
 359                 break;
 360         }
 361
 362         return ret;
 363 }
 364
 365 static struct dvb_tuner_ops mt2032_tuner_ops = {
 366         .set_analog_params = mt2032_set_params,
 367         .release           = microtune_release,
 368         .get_frequency     = microtune_get_frequency,
 369 };
 370
 371 // Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 372 static int mt2032_init(struct dvb_frontend *fe)
 373 {
 374         struct microtune_priv *priv = fe->tuner_priv;
 375         unsigned char buf[21];
 376         int ret,xogc,xok=0;
 377
 378         // Initialize Registers per spec.
 379         buf[1]=2; // Index to register 2
 380         buf[2]=0xff;
 381         buf[3]=0x0f;
 382         buf[4]=0x1f;
 383         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4);
 384
 385         buf[5]=6; // Index register 6
 386         buf[6]=0xe4;
 387         buf[7]=0x8f;
 388         buf[8]=0xc3;
 389         buf[9]=0x4e;
 390         buf[10]=0xec;
 391         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6);
 392
 393         buf[12]=13;  // Index register 13
 394         buf[13]=0x32;
 395         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2);
 396
 397         // Adjust XOGC (register 7), wait for XOK
 398         xogc=7;
 399         do {
 400                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 401                 mdelay(10);
 402                 buf[0]=0x0e;
 403                 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 404                 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 405                 xok=buf[0]&0x01;
 406                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 407                 if (xok == 1) break;
 408
 409                 xogc--;
 410                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 411                 if (xogc == 3) {
 412                         xogc=4; // min. 4 per spec
 413                         break;
 414                 }
 415                 buf[0]=0x07;
 416                 buf[1]=0x88 + xogc;
 417                 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 418                 if (ret!=2)
 419                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 420         } while (xok != 1 );
 421         priv->xogc=xogc;
 422
 423         memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops));
 424
 425         return(1);
 426 }
 427
 428 static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna)
 429 {
 430         struct microtune_priv *priv = fe->tuner_priv;
 431         unsigned char buf[2];
 432         int ret;
 433
 434         buf[0] = 6;
 435         buf[1] = antenna ? 0x11 : 0x10;
 436         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 437         tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 438 }
 439
 440 static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)
 441 {
 442         struct microtune_priv *priv = fe->tuner_priv;
 443         unsigned int if1=1218*1000*1000;
 444         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 445         int ret;
 446         unsigned char buf[6];
 447
 448         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 449                   freq,if1,if2);
 450
 451         f_lo1=freq+if1;
 452         f_lo1=(f_lo1/1000000)*1000000;
 453
 454         f_lo2=f_lo1-freq-if2;
 455         f_lo2=(f_lo2/50000)*50000;
 456
 457         lo1=f_lo1/4000000;
 458         lo2=f_lo2/4000000;
 459
 460         f_lo1_modulo= f_lo1-(lo1*4000000);
 461         f_lo2_modulo= f_lo2-(lo2*4000000);
 462
 463         num1=4*f_lo1_modulo/4000000;
 464         num2=4096*(f_lo2_modulo/1000)/4000;
 465
 466         // todo spurchecks
 467
 468         div1a=(lo1/12)-1;
 469         div1b=lo1-(div1a+1)*12;
 470
 471         div2a=(lo2/8)-1;
 472         div2b=lo2-(div2a+1)*8;
 473
 474         if (debug > 1) {
 475                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 476                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 477                           num1,num2,div1a,div1b,div2a,div2b);
 478         }
 479
 480         buf[0]=1;
 481         buf[1]= 4*div1b + num1;
 482         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 483
 484         buf[2]=div1a;
 485         buf[3]=32*div2b + num2/256;
 486         buf[4]=num2-(num2/256)*256;
 487         buf[5]=div2a;
 488         if(num2!=0) buf[5]=buf[5]|0x40;
 489
 490         if (debug > 1) {
 491                 int i;
 492                 tuner_dbg("bufs is: ");
 493                 for(i=0;i<6;i++)
 494                         printk("%x ",buf[i]);
 495                 printk("\n");
 496         }
 497
 498         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6);
 499         if (ret!=6)
 500                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 501 }
 502
 503 static int mt2050_set_tv_freq(struct dvb_frontend *fe,
 504                               struct analog_parameters *params)
 505 {
 506         unsigned int if2;
 507
 508         if (params->std & V4L2_STD_525_60) {
 509                 // NTSC
 510                 if2 = 45750*1000;
 511         } else {
 512                 // PAL
 513                 if2 = 38900*1000;
 514         }
 515         if (V4L2_TUNER_DIGITAL_TV == params->mode) {
 516                 // DVB (pinnacle 300i)
 517                 if2 = 36150*1000;
 518         }
 519         mt2050_set_if_freq(fe, params->frequency*62500, if2);
 520         mt2050_set_antenna(fe, tv_antenna);
 521
 522         return 0;
 523 }
 524
 525 static int mt2050_set_radio_freq(struct dvb_frontend *fe,
 526                                  struct analog_parameters *params)
 527 {
 528         struct microtune_priv *priv = fe->tuner_priv;
 529         int if2;
 530
 531         if (params->std & V4L2_STD_525_60) {
 532                 tuner_dbg("pinnacle ntsc\n");
 533                 if2 = 41300 * 1000;
 534         } else {
 535                 tuner_dbg("pinnacle pal\n");
 536                 if2 = 33300 * 1000;
 537         }
 538
 539         mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2);
 540         mt2050_set_antenna(fe, radio_antenna);
 541
 542         return 0;
 543 }
 544
 545 static int mt2050_set_params(struct dvb_frontend *fe,
 546                              struct analog_parameters *params)
 547 {
 548         struct microtune_priv *priv = fe->tuner_priv;
 549         int ret = -EINVAL;
 550
 551         switch (params->mode) {
 552         case V4L2_TUNER_RADIO:
 553                 ret = mt2050_set_radio_freq(fe, params);
 554                 priv->frequency = params->frequency * 125 / 2;
 555                 break;
 556         case V4L2_TUNER_ANALOG_TV:
 557         case V4L2_TUNER_DIGITAL_TV:
 558                 ret = mt2050_set_tv_freq(fe, params);
 559                 priv->frequency = params->frequency * 62500;
 560                 break;
 561         }
 562
 563         return ret;
 564 }
 565
 566 static struct dvb_tuner_ops mt2050_tuner_ops = {
 567         .set_analog_params = mt2050_set_params,
 568         .release           = microtune_release,
 569         .get_frequency     = microtune_get_frequency,
 570 };
 571
 572 static int mt2050_init(struct dvb_frontend *fe)
 573 {
 574         struct microtune_priv *priv = fe->tuner_priv;
 575         unsigned char buf[2];
 576         int ret;
 577
 578         buf[0]=6;
 579         buf[1]=0x10;
 580         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); //  power
 581
 582         buf[0]=0x0f;
 583         buf[1]=0x0f;
 584         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // m1lo
 585
 586         buf[0]=0x0d;
 587         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 588         tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 589
 590         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 591
 592         memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops));
 593
 594         return 0;
 595 }
 596
 597 struct dvb_frontend *microtune_attach(struct dvb_frontend *fe,
 598                                       struct i2c_adapter* i2c_adap,
 599                                       u8 i2c_addr)
 600 {
 601         struct microtune_priv *priv = NULL;
 602         char *name;
 603         unsigned char buf[21];
 604         int company_code;
 605
 606         priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
 607         if (priv == NULL)
 608                 return NULL;
 609         fe->tuner_priv = priv;
 610
 611         priv->i2c_props.addr = i2c_addr;
 612         priv->i2c_props.adap = i2c_adap;
 613         priv->i2c_props.name = "mt20xx";
 614
 615         //priv->radio_if2 = 10700 * 1000;       /* 10.7MHz - FM radio */
 616
 617         memset(buf,0,sizeof(buf));
 618
 619         name = "unknown";
 620
 621         tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 622         tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
 623         if (debug) {
 624                 int i;
 625                 tuner_dbg("MT20xx hexdump:");
 626                 for(i=0;i<21;i++) {
 627                         printk(" %02x",buf[i]);
 628                         if(((i+1)%8)==0) printk(" ");
 629                 }
 630                 printk("\n");
 631         }
 632         company_code = buf[0x11] << 8 | buf[0x12];
 633         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 634                    company_code,buf[0x13],buf[0x14]);
 635
 636
 637         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 638             NULL != microtune_part[buf[0x13]])
 639                 name = microtune_part[buf[0x13]];
 640         switch (buf[0x13]) {
 641         case MT2032:
 642                 mt2032_init(fe);
 643                 break;
 644         case MT2050:
 645                 mt2050_init(fe);
 646                 break;
 647         default:
 648                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 649                            name);
 650                 return NULL;
 651         }
 652
 653         strlcpy(fe->ops.tuner_ops.info.name, name,
 654                 sizeof(fe->ops.tuner_ops.info.name));
 655         tuner_info("microtune %s found, OK\n",name);
 656         return fe;
 657 }
 658
 659 EXPORT_SYMBOL_GPL(microtune_attach);
 660
 661 MODULE_DESCRIPTION("Microtune tuner driver");
 662 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
 663 MODULE_LICENSE("GPL");
 664
 665 /*
 666  * Overrides for Emacs so that we follow Linus's tabbing style.
 667  * ---------------------------------------------------------------------------
 668  * Local variables:
 669  * c-basic-offset: 8
 670  * End:
 671  */