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