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

   1 /*
   2  *
   3  * i2c tv tuner chip device driver
   4  * controls microtune tuners, mt2032 + mt2050 at the moment.
   5  */
   6 #include <linux/delay.h>
   7 #include <linux/i2c.h>
   8 #include <linux/videodev.h>
   9 #include <linux/moduleparam.h>
  10 #include <media/tuner.h>
  11
  12 /* ---------------------------------------------------------------------- */
  13
  14 static unsigned int optimize_vco  = 1;
  15 module_param(optimize_vco,      int, 0644);
  16
  17 static unsigned int tv_antenna    = 1;
  18 module_param(tv_antenna,        int, 0644);
  19
  20 static unsigned int radio_antenna = 0;
  21 module_param(radio_antenna,     int, 0644);
  22
  23 /* from tuner-core.c */
  24 extern int tuner_debug;
  25
  26 /* ---------------------------------------------------------------------- */
  27
  28 #define MT2032 0x04
  29 #define MT2030 0x06
  30 #define MT2040 0x07
  31 #define MT2050 0x42
  32
  33 static char *microtune_part[] = {
  34         [ MT2030 ] = "MT2030",
  35         [ MT2032 ] = "MT2032",
  36         [ MT2040 ] = "MT2040",
  37         [ MT2050 ] = "MT2050",
  38 };
  39
  40 struct microtune_priv {
  41         unsigned int xogc;
  42         unsigned int radio_if2;
  43 };
  44
  45 // IsSpurInBand()?
  46 static int mt2032_spurcheck(struct i2c_client *c,
  47                             int f1, int f2, int spectrum_from,int spectrum_to)
  48 {
  49         struct tuner *t = i2c_get_clientdata(c);
  50         int n1=1,n2,f;
  51
  52         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  53         f2=f2/1000;
  54         spectrum_from/=1000;
  55         spectrum_to/=1000;
  56
  57         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  58                   f1,f2,spectrum_from,spectrum_to);
  59
  60         do {
  61             n2=-n1;
  62             f=n1*(f1-f2);
  63             do {
  64                 n2--;
  65                 f=f-f2;
  66                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  67
  68                 if( (f>spectrum_from) && (f<spectrum_to))
  69                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  70             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  71             n1++;
  72         } while (n1<5);
  73
  74         return 1;
  75 }
  76
  77 static int mt2032_compute_freq(struct i2c_client *c,
  78                                unsigned int rfin,
  79                                unsigned int if1, unsigned int if2,
  80                                unsigned int spectrum_from,
  81                                unsigned int spectrum_to,
  82                                unsigned char *buf,
  83                                int *ret_sel,
  84                                unsigned int xogc) //all in Hz
  85 {
  86         struct tuner *t = i2c_get_clientdata(c);
  87         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
  88                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
  89
  90         fref= 5250 *1000; //5.25MHz
  91         desired_lo1=rfin+if1;
  92
  93         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
  94         lo1n=lo1/8;
  95         lo1a=lo1-(lo1n*8);
  96
  97         s=rfin/1000/1000+1090;
  98
  99         if(optimize_vco) {
 100                 if(s>1890) sel=0;
 101                 else if(s>1720) sel=1;
 102                 else if(s>1530) sel=2;
 103                 else if(s>1370) sel=3;
 104                 else sel=4; // >1090
 105         }
 106         else {
 107                 if(s>1790) sel=0; // <1958
 108                 else if(s>1617) sel=1;
 109                 else if(s>1449) sel=2;
 110                 else if(s>1291) sel=3;
 111                 else sel=4; // >1090
 112         }
 113         *ret_sel=sel;
 114
 115         lo1freq=(lo1a+8*lo1n)*fref;
 116
 117         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 118                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 119
 120         desired_lo2=lo1freq-rfin-if2;
 121         lo2=(desired_lo2)/fref;
 122         lo2n=lo2/8;
 123         lo2a=lo2-(lo2n*8);
 124         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 125         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 126
 127         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 128                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 129
 130         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
 131                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 132                            lo1a, lo1n, lo2a,lo2n);
 133                 return(-1);
 134         }
 135
 136         mt2032_spurcheck(c, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 137         // should recalculate lo1 (one step up/down)
 138
 139         // set up MT2032 register map for transfer over i2c
 140         buf[0]=lo1n-1;
 141         buf[1]=lo1a | (sel<<4);
 142         buf[2]=0x86; // LOGC
 143         buf[3]=0x0f; //reserved
 144         buf[4]=0x1f;
 145         buf[5]=(lo2n-1) | (lo2a<<5);
 146         if(rfin >400*1000*1000)
 147                 buf[6]=0xe4;
 148         else
 149                 buf[6]=0xf4; // set PKEN per rev 1.2
 150         buf[7]=8+xogc;
 151         buf[8]=0xc3; //reserved
 152         buf[9]=0x4e; //reserved
 153         buf[10]=0xec; //reserved
 154         buf[11]=(lo2num&0xff);
 155         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 156
 157         return 0;
 158 }
 159
 160 static int mt2032_check_lo_lock(struct i2c_client *c)
 161 {
 162         struct tuner *t = i2c_get_clientdata(c);
 163         int try,lock=0;
 164         unsigned char buf[2];
 165
 166         for(try=0;try<10;try++) {
 167                 buf[0]=0x0e;
 168                 i2c_master_send(c,buf,1);
 169                 i2c_master_recv(c,buf,1);
 170                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 171                 lock=buf[0] &0x06;
 172
 173                 if (lock==6)
 174                         break;
 175
 176                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 177                 udelay(1000);
 178         }
 179         return lock;
 180 }
 181
 182 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
 183 {
 184         struct tuner *t = i2c_get_clientdata(c);
 185         unsigned char buf[2];
 186         int tad1;
 187
 188         buf[0]=0x0f;
 189         i2c_master_send(c,buf,1);
 190         i2c_master_recv(c,buf,1);
 191         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 192         tad1=buf[0]&0x07;
 193
 194         if(tad1 ==0) return lock;
 195         if(tad1 ==1) return lock;
 196
 197         if(tad1==2) {
 198                 if(sel==0)
 199                         return lock;
 200                 else sel--;
 201         }
 202         else {
 203                 if(sel<4)
 204                         sel++;
 205                 else
 206                         return lock;
 207         }
 208
 209         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 210
 211         buf[0]=0x0f;
 212         buf[1]=sel;
 213         i2c_master_send(c,buf,2);
 214         lock=mt2032_check_lo_lock(c);
 215         return lock;
 216 }
 217
 218
 219 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
 220                                unsigned int if1, unsigned int if2,
 221                                unsigned int from, unsigned int to)
 222 {
 223         unsigned char buf[21];
 224         int lint_try,ret,sel,lock=0;
 225         struct tuner *t = i2c_get_clientdata(c);
 226         struct microtune_priv *priv = t->priv;
 227
 228         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 229                   rfin,if1,if2,from,to);
 230
 231         buf[0]=0;
 232         ret=i2c_master_send(c,buf,1);
 233         i2c_master_recv(c,buf,21);
 234
 235         buf[0]=0;
 236         ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
 237         if (ret<0)
 238                 return;
 239
 240         // send only the relevant registers per Rev. 1.2
 241         buf[0]=0;
 242         ret=i2c_master_send(c,buf,4);
 243         buf[5]=5;
 244         ret=i2c_master_send(c,buf+5,4);
 245         buf[11]=11;
 246         ret=i2c_master_send(c,buf+11,3);
 247         if(ret!=3)
 248                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 249
 250         // wait for PLLs to lock (per manual), retry LINT if not.
 251         for(lint_try=0; lint_try<2; lint_try++) {
 252                 lock=mt2032_check_lo_lock(c);
 253
 254                 if(optimize_vco)
 255                         lock=mt2032_optimize_vco(c,sel,lock);
 256                 if(lock==6) break;
 257
 258                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 259                 buf[0]=7;
 260                 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
 261                 i2c_master_send(c,buf,2);
 262                 mdelay(10);
 263                 buf[1]=8+priv->xogc;
 264                 i2c_master_send(c,buf,2);
 265         }
 266
 267         if (lock!=6)
 268                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 269
 270         buf[0]=2;
 271         buf[1]=0x20; // LOGC for optimal phase noise
 272         ret=i2c_master_send(c,buf,2);
 273         if (ret!=2)
 274                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 275 }
 276
 277
 278 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
 279 {
 280         struct tuner *t = i2c_get_clientdata(c);
 281         int if2,from,to;
 282
 283         // signal bandwidth and picture carrier
 284         if (t->std & V4L2_STD_525_60) {
 285                 // NTSC
 286                 from = 40750*1000;
 287                 to   = 46750*1000;
 288                 if2  = 45750*1000;
 289         } else {
 290                 // PAL
 291                 from = 32900*1000;
 292                 to   = 39900*1000;
 293                 if2  = 38900*1000;
 294         }
 295
 296         mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
 297                            1090*1000*1000, if2, from, to);
 298 }
 299
 300 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
 301 {
 302         struct tuner *t = i2c_get_clientdata(c);
 303         struct microtune_priv *priv = t->priv;
 304         int if2 = priv->radio_if2;
 305
 306         // per Manual for FM tuning: first if center freq. 1085 MHz
 307         mt2032_set_if_freq(c, freq * 1000 / 16,
 308                               1085*1000*1000,if2,if2,if2);
 309 }
 310
 311 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 312 static int mt2032_init(struct i2c_client *c)
 313 {
 314         struct tuner *t = i2c_get_clientdata(c);
 315         struct microtune_priv *priv = t->priv;
 316         unsigned char buf[21];
 317         int ret,xogc,xok=0;
 318
 319         // Initialize Registers per spec.
 320         buf[1]=2; // Index to register 2
 321         buf[2]=0xff;
 322         buf[3]=0x0f;
 323         buf[4]=0x1f;
 324         ret=i2c_master_send(c,buf+1,4);
 325
 326         buf[5]=6; // Index register 6
 327         buf[6]=0xe4;
 328         buf[7]=0x8f;
 329         buf[8]=0xc3;
 330         buf[9]=0x4e;
 331         buf[10]=0xec;
 332         ret=i2c_master_send(c,buf+5,6);
 333
 334         buf[12]=13;  // Index register 13
 335         buf[13]=0x32;
 336         ret=i2c_master_send(c,buf+12,2);
 337
 338         // Adjust XOGC (register 7), wait for XOK
 339         xogc=7;
 340         do {
 341                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 342                 mdelay(10);
 343                 buf[0]=0x0e;
 344                 i2c_master_send(c,buf,1);
 345                 i2c_master_recv(c,buf,1);
 346                 xok=buf[0]&0x01;
 347                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 348                 if (xok == 1) break;
 349
 350                 xogc--;
 351                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 352                 if (xogc == 3) {
 353                         xogc=4; // min. 4 per spec
 354                         break;
 355                 }
 356                 buf[0]=0x07;
 357                 buf[1]=0x88 + xogc;
 358                 ret=i2c_master_send(c,buf,2);
 359                 if (ret!=2)
 360                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 361         } while (xok != 1 );
 362         priv->xogc=xogc;
 363
 364         t->set_tv_freq    = mt2032_set_tv_freq;
 365         t->set_radio_freq = mt2032_set_radio_freq;
 366         return(1);
 367 }
 368
 369 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
 370 {
 371         struct tuner *t = i2c_get_clientdata(c);
 372         unsigned char buf[2];
 373         int ret;
 374
 375         buf[0] = 6;
 376         buf[1] = antenna ? 0x11 : 0x10;
 377         ret=i2c_master_send(c,buf,2);
 378         tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 379 }
 380
 381 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
 382 {
 383         struct tuner *t = i2c_get_clientdata(c);
 384         unsigned int if1=1218*1000*1000;
 385         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 386         int ret;
 387         unsigned char buf[6];
 388
 389         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 390                   freq,if1,if2);
 391
 392         f_lo1=freq+if1;
 393         f_lo1=(f_lo1/1000000)*1000000;
 394
 395         f_lo2=f_lo1-freq-if2;
 396         f_lo2=(f_lo2/50000)*50000;
 397
 398         lo1=f_lo1/4000000;
 399         lo2=f_lo2/4000000;
 400
 401         f_lo1_modulo= f_lo1-(lo1*4000000);
 402         f_lo2_modulo= f_lo2-(lo2*4000000);
 403
 404         num1=4*f_lo1_modulo/4000000;
 405         num2=4096*(f_lo2_modulo/1000)/4000;
 406
 407         // todo spurchecks
 408
 409         div1a=(lo1/12)-1;
 410         div1b=lo1-(div1a+1)*12;
 411
 412         div2a=(lo2/8)-1;
 413         div2b=lo2-(div2a+1)*8;
 414
 415         if (tuner_debug > 1) {
 416                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 417                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 418                           num1,num2,div1a,div1b,div2a,div2b);
 419         }
 420
 421         buf[0]=1;
 422         buf[1]= 4*div1b + num1;
 423         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 424
 425         buf[2]=div1a;
 426         buf[3]=32*div2b + num2/256;
 427         buf[4]=num2-(num2/256)*256;
 428         buf[5]=div2a;
 429         if(num2!=0) buf[5]=buf[5]|0x40;
 430
 431         if (tuner_debug > 1) {
 432                 int i;
 433                 tuner_dbg("bufs is: ");
 434                 for(i=0;i<6;i++)
 435                         printk("%x ",buf[i]);
 436                 printk("\n");
 437         }
 438
 439         ret=i2c_master_send(c,buf,6);
 440         if (ret!=6)
 441                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 442 }
 443
 444 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
 445 {
 446         struct tuner *t = i2c_get_clientdata(c);
 447         unsigned int if2;
 448
 449         if (t->std & V4L2_STD_525_60) {
 450                 // NTSC
 451                 if2 = 45750*1000;
 452         } else {
 453                 // PAL
 454                 if2 = 38900*1000;
 455         }
 456         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
 457                 // DVB (pinnacle 300i)
 458                 if2 = 36150*1000;
 459         }
 460         mt2050_set_if_freq(c, freq*62500, if2);
 461         mt2050_set_antenna(c, tv_antenna);
 462 }
 463
 464 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
 465 {
 466         struct tuner *t = i2c_get_clientdata(c);
 467         struct microtune_priv *priv = t->priv;
 468         int if2 = priv->radio_if2;
 469
 470         mt2050_set_if_freq(c, freq * 1000 / 16, if2);
 471         mt2050_set_antenna(c, radio_antenna);
 472 }
 473
 474 static int mt2050_init(struct i2c_client *c)
 475 {
 476         struct tuner *t = i2c_get_clientdata(c);
 477         unsigned char buf[2];
 478         int ret;
 479
 480         buf[0]=6;
 481         buf[1]=0x10;
 482         ret=i2c_master_send(c,buf,2); //  power
 483
 484         buf[0]=0x0f;
 485         buf[1]=0x0f;
 486         ret=i2c_master_send(c,buf,2); // m1lo
 487
 488         buf[0]=0x0d;
 489         ret=i2c_master_send(c,buf,1);
 490         i2c_master_recv(c,buf,1);
 491
 492         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 493         t->set_tv_freq    = mt2050_set_tv_freq;
 494         t->set_radio_freq = mt2050_set_radio_freq;
 495         return 0;
 496 }
 497
 498 int microtune_init(struct i2c_client *c)
 499 {
 500         struct microtune_priv *priv = NULL;
 501         struct tuner *t = i2c_get_clientdata(c);
 502         char *name;
 503         unsigned char buf[21];
 504         int company_code;
 505
 506         priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
 507         if (priv == NULL)
 508                 return -ENOMEM;
 509         t->priv = priv;
 510
 511         priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
 512
 513         memset(buf,0,sizeof(buf));
 514         t->set_tv_freq    = NULL;
 515         t->set_radio_freq = NULL;
 516         t->standby    = NULL;
 517         if (t->std & V4L2_STD_525_60) {
 518                 tuner_dbg("pinnacle ntsc\n");
 519                 priv->radio_if2 = 41300 * 1000;
 520         } else {
 521                 tuner_dbg("pinnacle pal\n");
 522                 priv->radio_if2 = 33300 * 1000;
 523         }
 524         name = "unknown";
 525
 526         i2c_master_send(c,buf,1);
 527         i2c_master_recv(c,buf,21);
 528         if (tuner_debug) {
 529                 int i;
 530                 tuner_dbg("MT20xx hexdump:");
 531                 for(i=0;i<21;i++) {
 532                         printk(" %02x",buf[i]);
 533                         if(((i+1)%8)==0) printk(" ");
 534                 }
 535                 printk("\n");
 536         }
 537         company_code = buf[0x11] << 8 | buf[0x12];
 538         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 539                    company_code,buf[0x13],buf[0x14]);
 540
 541
 542         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 543             NULL != microtune_part[buf[0x13]])
 544                 name = microtune_part[buf[0x13]];
 545         switch (buf[0x13]) {
 546         case MT2032:
 547                 mt2032_init(c);
 548                 break;
 549         case MT2050:
 550                 mt2050_init(c);
 551                 break;
 552         default:
 553                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 554                            name);
 555                 return 0;
 556         }
 557
 558         strlcpy(c->name, name, sizeof(c->name));
 559         tuner_info("microtune %s found, OK\n",name);
 560         return 0;
 561 }
 562
 563 /*
 564  * Overrides for Emacs so that we follow Linus's tabbing style.
 565  * ---------------------------------------------------------------------------
 566  * Local variables:
 567  * c-basic-offset: 8
 568  * End:
 569  */