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

   1 /*
   2  * $Id: mt20xx.c,v 1.5 2005/06/16 08:29:49 nsh Exp $
   3  *
   4  * i2c tv tuner chip device driver
   5  * controls microtune tuners, mt2032 + mt2050 at the moment.
   6  */
   7 #include <linux/delay.h>
   8 #include <linux/i2c.h>
   9 #include <linux/videodev.h>
  10 #include <linux/moduleparam.h>
  11 #include <media/tuner.h>
  12
  13 /* ---------------------------------------------------------------------- */
  14
  15 static unsigned int optimize_vco  = 1;
  16 module_param(optimize_vco,      int, 0644);
  17
  18 static unsigned int tv_antenna    = 1;
  19 module_param(tv_antenna,        int, 0644);
  20
  21 static unsigned int radio_antenna = 0;
  22 module_param(radio_antenna,     int, 0644);
  23
  24 /* ---------------------------------------------------------------------- */
  25
  26 #define MT2032 0x04
  27 #define MT2030 0x06
  28 #define MT2040 0x07
  29 #define MT2050 0x42
  30
  31 static char *microtune_part[] = {
  32         [ MT2030 ] = "MT2030",
  33         [ MT2032 ] = "MT2032",
  34         [ MT2040 ] = "MT2040",
  35         [ MT2050 ] = "MT2050",
  36 };
  37
  38 // IsSpurInBand()?
  39 static int mt2032_spurcheck(struct i2c_client *c,
  40                             int f1, int f2, int spectrum_from,int spectrum_to)
  41 {
  42         struct tuner *t = i2c_get_clientdata(c);
  43         int n1=1,n2,f;
  44
  45         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  46         f2=f2/1000;
  47         spectrum_from/=1000;
  48         spectrum_to/=1000;
  49
  50         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  51                   f1,f2,spectrum_from,spectrum_to);
  52
  53         do {
  54             n2=-n1;
  55             f=n1*(f1-f2);
  56             do {
  57                 n2--;
  58                 f=f-f2;
  59                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  60
  61                 if( (f>spectrum_from) && (f<spectrum_to))
  62                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  63             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  64             n1++;
  65         } while (n1<5);
  66
  67         return 1;
  68 }
  69
  70 static int mt2032_compute_freq(struct i2c_client *c,
  71                                unsigned int rfin,
  72                                unsigned int if1, unsigned int if2,
  73                                unsigned int spectrum_from,
  74                                unsigned int spectrum_to,
  75                                unsigned char *buf,
  76                                int *ret_sel,
  77                                unsigned int xogc) //all in Hz
  78 {
  79         struct tuner *t = i2c_get_clientdata(c);
  80         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
  81                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
  82
  83         fref= 5250 *1000; //5.25MHz
  84         desired_lo1=rfin+if1;
  85
  86         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
  87         lo1n=lo1/8;
  88         lo1a=lo1-(lo1n*8);
  89
  90         s=rfin/1000/1000+1090;
  91
  92         if(optimize_vco) {
  93                 if(s>1890) sel=0;
  94                 else if(s>1720) sel=1;
  95                 else if(s>1530) sel=2;
  96                 else if(s>1370) sel=3;
  97                 else sel=4; // >1090
  98         }
  99         else {
 100                 if(s>1790) sel=0; // <1958
 101                 else if(s>1617) sel=1;
 102                 else if(s>1449) sel=2;
 103                 else if(s>1291) sel=3;
 104                 else sel=4; // >1090
 105         }
 106         *ret_sel=sel;
 107
 108         lo1freq=(lo1a+8*lo1n)*fref;
 109
 110         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 111                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 112
 113         desired_lo2=lo1freq-rfin-if2;
 114         lo2=(desired_lo2)/fref;
 115         lo2n=lo2/8;
 116         lo2a=lo2-(lo2n*8);
 117         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 118         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 119
 120         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 121                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 122
 123         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
 124                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 125                            lo1a, lo1n, lo2a,lo2n);
 126                 return(-1);
 127         }
 128
 129         mt2032_spurcheck(c, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 130         // should recalculate lo1 (one step up/down)
 131
 132         // set up MT2032 register map for transfer over i2c
 133         buf[0]=lo1n-1;
 134         buf[1]=lo1a | (sel<<4);
 135         buf[2]=0x86; // LOGC
 136         buf[3]=0x0f; //reserved
 137         buf[4]=0x1f;
 138         buf[5]=(lo2n-1) | (lo2a<<5);
 139         if(rfin >400*1000*1000)
 140                 buf[6]=0xe4;
 141         else
 142                 buf[6]=0xf4; // set PKEN per rev 1.2
 143         buf[7]=8+xogc;
 144         buf[8]=0xc3; //reserved
 145         buf[9]=0x4e; //reserved
 146         buf[10]=0xec; //reserved
 147         buf[11]=(lo2num&0xff);
 148         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 149
 150         return 0;
 151 }
 152
 153 static int mt2032_check_lo_lock(struct i2c_client *c)
 154 {
 155         struct tuner *t = i2c_get_clientdata(c);
 156         int try,lock=0;
 157         unsigned char buf[2];
 158
 159         for(try=0;try<10;try++) {
 160                 buf[0]=0x0e;
 161                 i2c_master_send(c,buf,1);
 162                 i2c_master_recv(c,buf,1);
 163                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 164                 lock=buf[0] &0x06;
 165
 166                 if (lock==6)
 167                         break;
 168
 169                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 170                 udelay(1000);
 171         }
 172         return lock;
 173 }
 174
 175 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
 176 {
 177         struct tuner *t = i2c_get_clientdata(c);
 178         unsigned char buf[2];
 179         int tad1;
 180
 181         buf[0]=0x0f;
 182         i2c_master_send(c,buf,1);
 183         i2c_master_recv(c,buf,1);
 184         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 185         tad1=buf[0]&0x07;
 186
 187         if(tad1 ==0) return lock;
 188         if(tad1 ==1) return lock;
 189
 190         if(tad1==2) {
 191                 if(sel==0)
 192                         return lock;
 193                 else sel--;
 194         }
 195         else {
 196                 if(sel<4)
 197                         sel++;
 198                 else
 199                         return lock;
 200         }
 201
 202         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 203
 204         buf[0]=0x0f;
 205         buf[1]=sel;
 206         i2c_master_send(c,buf,2);
 207         lock=mt2032_check_lo_lock(c);
 208         return lock;
 209 }
 210
 211
 212 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
 213                                unsigned int if1, unsigned int if2,
 214                                unsigned int from, unsigned int to)
 215 {
 216         unsigned char buf[21];
 217         int lint_try,ret,sel,lock=0;
 218         struct tuner *t = i2c_get_clientdata(c);
 219
 220         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 221                   rfin,if1,if2,from,to);
 222
 223         buf[0]=0;
 224         ret=i2c_master_send(c,buf,1);
 225         i2c_master_recv(c,buf,21);
 226
 227         buf[0]=0;
 228         ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,t->xogc);
 229         if (ret<0)
 230                 return;
 231
 232         // send only the relevant registers per Rev. 1.2
 233         buf[0]=0;
 234         ret=i2c_master_send(c,buf,4);
 235         buf[5]=5;
 236         ret=i2c_master_send(c,buf+5,4);
 237         buf[11]=11;
 238         ret=i2c_master_send(c,buf+11,3);
 239         if(ret!=3)
 240                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 241
 242         // wait for PLLs to lock (per manual), retry LINT if not.
 243         for(lint_try=0; lint_try<2; lint_try++) {
 244                 lock=mt2032_check_lo_lock(c);
 245
 246                 if(optimize_vco)
 247                         lock=mt2032_optimize_vco(c,sel,lock);
 248                 if(lock==6) break;
 249
 250                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 251                 buf[0]=7;
 252                 buf[1]=0x80 +8+t->xogc; // set LINT to re-init PLLs
 253                 i2c_master_send(c,buf,2);
 254                 mdelay(10);
 255                 buf[1]=8+t->xogc;
 256                 i2c_master_send(c,buf,2);
 257         }
 258
 259         if (lock!=6)
 260                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 261
 262         buf[0]=2;
 263         buf[1]=0x20; // LOGC for optimal phase noise
 264         ret=i2c_master_send(c,buf,2);
 265         if (ret!=2)
 266                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 267 }
 268
 269
 270 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
 271 {
 272         struct tuner *t = i2c_get_clientdata(c);
 273         int if2,from,to;
 274
 275         // signal bandwidth and picture carrier
 276         if (t->std & V4L2_STD_525_60) {
 277                 // NTSC
 278                 from = 40750*1000;
 279                 to   = 46750*1000;
 280                 if2  = 45750*1000;
 281         } else {
 282                 // PAL
 283                 from = 32900*1000;
 284                 to   = 39900*1000;
 285                 if2  = 38900*1000;
 286         }
 287
 288         mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
 289                            1090*1000*1000, if2, from, to);
 290 }
 291
 292 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
 293 {
 294         struct tuner *t = i2c_get_clientdata(c);
 295         int if2 = t->radio_if2;
 296
 297         // per Manual for FM tuning: first if center freq. 1085 MHz
 298         mt2032_set_if_freq(c, freq * 1000 / 16,
 299                               1085*1000*1000,if2,if2,if2);
 300 }
 301
 302 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 303 static int mt2032_init(struct i2c_client *c)
 304 {
 305         struct tuner *t = i2c_get_clientdata(c);
 306         unsigned char buf[21];
 307         int ret,xogc,xok=0;
 308
 309         // Initialize Registers per spec.
 310         buf[1]=2; // Index to register 2
 311         buf[2]=0xff;
 312         buf[3]=0x0f;
 313         buf[4]=0x1f;
 314         ret=i2c_master_send(c,buf+1,4);
 315
 316         buf[5]=6; // Index register 6
 317         buf[6]=0xe4;
 318         buf[7]=0x8f;
 319         buf[8]=0xc3;
 320         buf[9]=0x4e;
 321         buf[10]=0xec;
 322         ret=i2c_master_send(c,buf+5,6);
 323
 324         buf[12]=13;  // Index register 13
 325         buf[13]=0x32;
 326         ret=i2c_master_send(c,buf+12,2);
 327
 328         // Adjust XOGC (register 7), wait for XOK
 329         xogc=7;
 330         do {
 331                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 332                 mdelay(10);
 333                 buf[0]=0x0e;
 334                 i2c_master_send(c,buf,1);
 335                 i2c_master_recv(c,buf,1);
 336                 xok=buf[0]&0x01;
 337                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 338                 if (xok == 1) break;
 339
 340                 xogc--;
 341                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 342                 if (xogc == 3) {
 343                         xogc=4; // min. 4 per spec
 344                         break;
 345                 }
 346                 buf[0]=0x07;
 347                 buf[1]=0x88 + xogc;
 348                 ret=i2c_master_send(c,buf,2);
 349                 if (ret!=2)
 350                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 351         } while (xok != 1 );
 352         t->xogc=xogc;
 353
 354         t->tv_freq    = mt2032_set_tv_freq;
 355         t->radio_freq = mt2032_set_radio_freq;
 356         return(1);
 357 }
 358
 359 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
 360 {
 361         struct tuner *t = i2c_get_clientdata(c);
 362        unsigned char buf[2];
 363        int ret;
 364
 365        buf[0] = 6;
 366        buf[1] = antenna ? 0x11 : 0x10;
 367        ret=i2c_master_send(c,buf,2);
 368        tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 369 }
 370
 371 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
 372 {
 373         struct tuner *t = i2c_get_clientdata(c);
 374         unsigned int if1=1218*1000*1000;
 375         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 376         int ret;
 377         unsigned char buf[6];
 378
 379         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 380                   freq,if1,if2);
 381
 382         f_lo1=freq+if1;
 383         f_lo1=(f_lo1/1000000)*1000000;
 384
 385         f_lo2=f_lo1-freq-if2;
 386         f_lo2=(f_lo2/50000)*50000;
 387
 388         lo1=f_lo1/4000000;
 389         lo2=f_lo2/4000000;
 390
 391         f_lo1_modulo= f_lo1-(lo1*4000000);
 392         f_lo2_modulo= f_lo2-(lo2*4000000);
 393
 394         num1=4*f_lo1_modulo/4000000;
 395         num2=4096*(f_lo2_modulo/1000)/4000;
 396
 397         // todo spurchecks
 398
 399         div1a=(lo1/12)-1;
 400         div1b=lo1-(div1a+1)*12;
 401
 402         div2a=(lo2/8)-1;
 403         div2b=lo2-(div2a+1)*8;
 404
 405         if (tuner_debug > 1) {
 406                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 407                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 408                           num1,num2,div1a,div1b,div2a,div2b);
 409         }
 410
 411         buf[0]=1;
 412         buf[1]= 4*div1b + num1;
 413         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 414
 415         buf[2]=div1a;
 416         buf[3]=32*div2b + num2/256;
 417         buf[4]=num2-(num2/256)*256;
 418         buf[5]=div2a;
 419         if(num2!=0) buf[5]=buf[5]|0x40;
 420
 421         if (tuner_debug > 1) {
 422                 int i;
 423                 tuner_dbg("bufs is: ");
 424                 for(i=0;i<6;i++)
 425                         printk("%x ",buf[i]);
 426                 printk("\n");
 427         }
 428
 429         ret=i2c_master_send(c,buf,6);
 430         if (ret!=6)
 431                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 432 }
 433
 434 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
 435 {
 436         struct tuner *t = i2c_get_clientdata(c);
 437         unsigned int if2;
 438
 439         if (t->std & V4L2_STD_525_60) {
 440                 // NTSC
 441                 if2 = 45750*1000;
 442         } else {
 443                 // PAL
 444                 if2 = 38900*1000;
 445         }
 446         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
 447                 // DVB (pinnacle 300i)
 448                 if2 = 36150*1000;
 449         }
 450         mt2050_set_if_freq(c, freq*62500, if2);
 451         mt2050_set_antenna(c, tv_antenna);
 452 }
 453
 454 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
 455 {
 456         struct tuner *t = i2c_get_clientdata(c);
 457         int if2 = t->radio_if2;
 458
 459         mt2050_set_if_freq(c, freq*62500, if2);
 460         mt2050_set_antenna(c, radio_antenna);
 461 }
 462
 463 static int mt2050_init(struct i2c_client *c)
 464 {
 465         struct tuner *t = i2c_get_clientdata(c);
 466         unsigned char buf[2];
 467         int ret;
 468
 469         buf[0]=6;
 470         buf[1]=0x10;
 471         ret=i2c_master_send(c,buf,2); //  power
 472
 473         buf[0]=0x0f;
 474         buf[1]=0x0f;
 475         ret=i2c_master_send(c,buf,2); // m1lo
 476
 477         buf[0]=0x0d;
 478         ret=i2c_master_send(c,buf,1);
 479         i2c_master_recv(c,buf,1);
 480
 481         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 482         t->tv_freq    = mt2050_set_tv_freq;
 483         t->radio_freq = mt2050_set_radio_freq;
 484         return 0;
 485 }
 486
 487 int microtune_init(struct i2c_client *c)
 488 {
 489         struct tuner *t = i2c_get_clientdata(c);
 490         char *name;
 491         unsigned char buf[21];
 492         int company_code;
 493
 494         memset(buf,0,sizeof(buf));
 495         t->tv_freq    = NULL;
 496         t->radio_freq = NULL;
 497         name = "unknown";
 498
 499         i2c_master_send(c,buf,1);
 500         i2c_master_recv(c,buf,21);
 501         if (tuner_debug) {
 502                 int i;
 503                 tuner_dbg("MT20xx hexdump:");
 504                 for(i=0;i<21;i++) {
 505                         printk(" %02x",buf[i]);
 506                         if(((i+1)%8)==0) printk(" ");
 507                 }
 508                 printk("\n");
 509         }
 510         company_code = buf[0x11] << 8 | buf[0x12];
 511         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 512                    company_code,buf[0x13],buf[0x14]);
 513
 514
 515         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 516             NULL != microtune_part[buf[0x13]])
 517                 name = microtune_part[buf[0x13]];
 518         switch (buf[0x13]) {
 519         case MT2032:
 520                 mt2032_init(c);
 521                 break;
 522         case MT2050:
 523                 mt2050_init(c);
 524                 break;
 525         default:
 526                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 527                            name);
 528                 return 0;
 529         }
 530
 531         strlcpy(c->name, name, sizeof(c->name));
 532         tuner_info("microtune %s found, OK\n",name);
 533         return 0;
 534 }
 535
 536 /*
 537  * Overrides for Emacs so that we follow Linus's tabbing style.
 538  * ---------------------------------------------------------------------------
 539  * Local variables:
 540  * c-basic-offset: 8
 541  * End:
 542  */