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 "tuner-driver.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 static void microtune_release(struct i2c_client *c)
  46 {
  47         struct tuner *t = i2c_get_clientdata(c);
  48
  49         kfree(t->priv);
  50         t->priv = NULL;
  51 }
  52
  53 // IsSpurInBand()?
  54 static int mt2032_spurcheck(struct i2c_client *c,
  55                             int f1, int f2, int spectrum_from,int spectrum_to)
  56 {
  57         struct tuner *t = i2c_get_clientdata(c);
  58         int n1=1,n2,f;
  59
  60         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  61         f2=f2/1000;
  62         spectrum_from/=1000;
  63         spectrum_to/=1000;
  64
  65         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  66                   f1,f2,spectrum_from,spectrum_to);
  67
  68         do {
  69             n2=-n1;
  70             f=n1*(f1-f2);
  71             do {
  72                 n2--;
  73                 f=f-f2;
  74                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  75
  76                 if( (f>spectrum_from) && (f<spectrum_to))
  77                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  78             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  79             n1++;
  80         } while (n1<5);
  81
  82         return 1;
  83 }
  84
  85 static int mt2032_compute_freq(struct i2c_client *c,
  86                                unsigned int rfin,
  87                                unsigned int if1, unsigned int if2,
  88                                unsigned int spectrum_from,
  89                                unsigned int spectrum_to,
  90                                unsigned char *buf,
  91                                int *ret_sel,
  92                                unsigned int xogc) //all in Hz
  93 {
  94         struct tuner *t = i2c_get_clientdata(c);
  95         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
  96                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
  97
  98         fref= 5250 *1000; //5.25MHz
  99         desired_lo1=rfin+if1;
 100
 101         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
 102         lo1n=lo1/8;
 103         lo1a=lo1-(lo1n*8);
 104
 105         s=rfin/1000/1000+1090;
 106
 107         if(optimize_vco) {
 108                 if(s>1890) sel=0;
 109                 else if(s>1720) sel=1;
 110                 else if(s>1530) sel=2;
 111                 else if(s>1370) sel=3;
 112                 else sel=4; // >1090
 113         }
 114         else {
 115                 if(s>1790) sel=0; // <1958
 116                 else if(s>1617) sel=1;
 117                 else if(s>1449) sel=2;
 118                 else if(s>1291) sel=3;
 119                 else sel=4; // >1090
 120         }
 121         *ret_sel=sel;
 122
 123         lo1freq=(lo1a+8*lo1n)*fref;
 124
 125         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 126                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 127
 128         desired_lo2=lo1freq-rfin-if2;
 129         lo2=(desired_lo2)/fref;
 130         lo2n=lo2/8;
 131         lo2a=lo2-(lo2n*8);
 132         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 133         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 134
 135         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 136                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 137
 138         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
 139                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 140                            lo1a, lo1n, lo2a,lo2n);
 141                 return(-1);
 142         }
 143
 144         mt2032_spurcheck(c, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 145         // should recalculate lo1 (one step up/down)
 146
 147         // set up MT2032 register map for transfer over i2c
 148         buf[0]=lo1n-1;
 149         buf[1]=lo1a | (sel<<4);
 150         buf[2]=0x86; // LOGC
 151         buf[3]=0x0f; //reserved
 152         buf[4]=0x1f;
 153         buf[5]=(lo2n-1) | (lo2a<<5);
 154         if(rfin >400*1000*1000)
 155                 buf[6]=0xe4;
 156         else
 157                 buf[6]=0xf4; // set PKEN per rev 1.2
 158         buf[7]=8+xogc;
 159         buf[8]=0xc3; //reserved
 160         buf[9]=0x4e; //reserved
 161         buf[10]=0xec; //reserved
 162         buf[11]=(lo2num&0xff);
 163         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 164
 165         return 0;
 166 }
 167
 168 static int mt2032_check_lo_lock(struct i2c_client *c)
 169 {
 170         struct tuner *t = i2c_get_clientdata(c);
 171         int try,lock=0;
 172         unsigned char buf[2];
 173
 174         for(try=0;try<10;try++) {
 175                 buf[0]=0x0e;
 176                 i2c_master_send(c,buf,1);
 177                 i2c_master_recv(c,buf,1);
 178                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 179                 lock=buf[0] &0x06;
 180
 181                 if (lock==6)
 182                         break;
 183
 184                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 185                 udelay(1000);
 186         }
 187         return lock;
 188 }
 189
 190 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
 191 {
 192         struct tuner *t = i2c_get_clientdata(c);
 193         unsigned char buf[2];
 194         int tad1;
 195
 196         buf[0]=0x0f;
 197         i2c_master_send(c,buf,1);
 198         i2c_master_recv(c,buf,1);
 199         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 200         tad1=buf[0]&0x07;
 201
 202         if(tad1 ==0) return lock;
 203         if(tad1 ==1) return lock;
 204
 205         if(tad1==2) {
 206                 if(sel==0)
 207                         return lock;
 208                 else sel--;
 209         }
 210         else {
 211                 if(sel<4)
 212                         sel++;
 213                 else
 214                         return lock;
 215         }
 216
 217         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 218
 219         buf[0]=0x0f;
 220         buf[1]=sel;
 221         i2c_master_send(c,buf,2);
 222         lock=mt2032_check_lo_lock(c);
 223         return lock;
 224 }
 225
 226
 227 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
 228                                unsigned int if1, unsigned int if2,
 229                                unsigned int from, unsigned int to)
 230 {
 231         unsigned char buf[21];
 232         int lint_try,ret,sel,lock=0;
 233         struct tuner *t = i2c_get_clientdata(c);
 234         struct microtune_priv *priv = t->priv;
 235
 236         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 237                   rfin,if1,if2,from,to);
 238
 239         buf[0]=0;
 240         ret=i2c_master_send(c,buf,1);
 241         i2c_master_recv(c,buf,21);
 242
 243         buf[0]=0;
 244         ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
 245         if (ret<0)
 246                 return;
 247
 248         // send only the relevant registers per Rev. 1.2
 249         buf[0]=0;
 250         ret=i2c_master_send(c,buf,4);
 251         buf[5]=5;
 252         ret=i2c_master_send(c,buf+5,4);
 253         buf[11]=11;
 254         ret=i2c_master_send(c,buf+11,3);
 255         if(ret!=3)
 256                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 257
 258         // wait for PLLs to lock (per manual), retry LINT if not.
 259         for(lint_try=0; lint_try<2; lint_try++) {
 260                 lock=mt2032_check_lo_lock(c);
 261
 262                 if(optimize_vco)
 263                         lock=mt2032_optimize_vco(c,sel,lock);
 264                 if(lock==6) break;
 265
 266                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 267                 buf[0]=7;
 268                 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
 269                 i2c_master_send(c,buf,2);
 270                 mdelay(10);
 271                 buf[1]=8+priv->xogc;
 272                 i2c_master_send(c,buf,2);
 273         }
 274
 275         if (lock!=6)
 276                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 277
 278         buf[0]=2;
 279         buf[1]=0x20; // LOGC for optimal phase noise
 280         ret=i2c_master_send(c,buf,2);
 281         if (ret!=2)
 282                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 283 }
 284
 285
 286 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
 287 {
 288         struct tuner *t = i2c_get_clientdata(c);
 289         int if2,from,to;
 290
 291         // signal bandwidth and picture carrier
 292         if (t->std & V4L2_STD_525_60) {
 293                 // NTSC
 294                 from = 40750*1000;
 295                 to   = 46750*1000;
 296                 if2  = 45750*1000;
 297         } else {
 298                 // PAL
 299                 from = 32900*1000;
 300                 to   = 39900*1000;
 301                 if2  = 38900*1000;
 302         }
 303
 304         mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
 305                            1090*1000*1000, if2, from, to);
 306 }
 307
 308 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
 309 {
 310         struct tuner *t = i2c_get_clientdata(c);
 311         struct microtune_priv *priv = t->priv;
 312         int if2 = priv->radio_if2;
 313
 314         // per Manual for FM tuning: first if center freq. 1085 MHz
 315         mt2032_set_if_freq(c, freq * 1000 / 16,
 316                               1085*1000*1000,if2,if2,if2);
 317 }
 318
 319 static struct tuner_operations mt2032_tuner_ops = {
 320         .set_tv_freq    = mt2032_set_tv_freq,
 321         .set_radio_freq = mt2032_set_radio_freq,
 322         .release        = microtune_release,
 323 };
 324
 325 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 326 static int mt2032_init(struct i2c_client *c)
 327 {
 328         struct tuner *t = i2c_get_clientdata(c);
 329         struct microtune_priv *priv = t->priv;
 330         unsigned char buf[21];
 331         int ret,xogc,xok=0;
 332
 333         // Initialize Registers per spec.
 334         buf[1]=2; // Index to register 2
 335         buf[2]=0xff;
 336         buf[3]=0x0f;
 337         buf[4]=0x1f;
 338         ret=i2c_master_send(c,buf+1,4);
 339
 340         buf[5]=6; // Index register 6
 341         buf[6]=0xe4;
 342         buf[7]=0x8f;
 343         buf[8]=0xc3;
 344         buf[9]=0x4e;
 345         buf[10]=0xec;
 346         ret=i2c_master_send(c,buf+5,6);
 347
 348         buf[12]=13;  // Index register 13
 349         buf[13]=0x32;
 350         ret=i2c_master_send(c,buf+12,2);
 351
 352         // Adjust XOGC (register 7), wait for XOK
 353         xogc=7;
 354         do {
 355                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 356                 mdelay(10);
 357                 buf[0]=0x0e;
 358                 i2c_master_send(c,buf,1);
 359                 i2c_master_recv(c,buf,1);
 360                 xok=buf[0]&0x01;
 361                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 362                 if (xok == 1) break;
 363
 364                 xogc--;
 365                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 366                 if (xogc == 3) {
 367                         xogc=4; // min. 4 per spec
 368                         break;
 369                 }
 370                 buf[0]=0x07;
 371                 buf[1]=0x88 + xogc;
 372                 ret=i2c_master_send(c,buf,2);
 373                 if (ret!=2)
 374                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 375         } while (xok != 1 );
 376         priv->xogc=xogc;
 377
 378         memcpy(&t->ops, &mt2032_tuner_ops, sizeof(struct tuner_operations));
 379
 380         return(1);
 381 }
 382
 383 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
 384 {
 385         struct tuner *t = i2c_get_clientdata(c);
 386         unsigned char buf[2];
 387         int ret;
 388
 389         buf[0] = 6;
 390         buf[1] = antenna ? 0x11 : 0x10;
 391         ret=i2c_master_send(c,buf,2);
 392         tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 393 }
 394
 395 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
 396 {
 397         struct tuner *t = i2c_get_clientdata(c);
 398         unsigned int if1=1218*1000*1000;
 399         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 400         int ret;
 401         unsigned char buf[6];
 402
 403         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 404                   freq,if1,if2);
 405
 406         f_lo1=freq+if1;
 407         f_lo1=(f_lo1/1000000)*1000000;
 408
 409         f_lo2=f_lo1-freq-if2;
 410         f_lo2=(f_lo2/50000)*50000;
 411
 412         lo1=f_lo1/4000000;
 413         lo2=f_lo2/4000000;
 414
 415         f_lo1_modulo= f_lo1-(lo1*4000000);
 416         f_lo2_modulo= f_lo2-(lo2*4000000);
 417
 418         num1=4*f_lo1_modulo/4000000;
 419         num2=4096*(f_lo2_modulo/1000)/4000;
 420
 421         // todo spurchecks
 422
 423         div1a=(lo1/12)-1;
 424         div1b=lo1-(div1a+1)*12;
 425
 426         div2a=(lo2/8)-1;
 427         div2b=lo2-(div2a+1)*8;
 428
 429         if (tuner_debug > 1) {
 430                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 431                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 432                           num1,num2,div1a,div1b,div2a,div2b);
 433         }
 434
 435         buf[0]=1;
 436         buf[1]= 4*div1b + num1;
 437         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 438
 439         buf[2]=div1a;
 440         buf[3]=32*div2b + num2/256;
 441         buf[4]=num2-(num2/256)*256;
 442         buf[5]=div2a;
 443         if(num2!=0) buf[5]=buf[5]|0x40;
 444
 445         if (tuner_debug > 1) {
 446                 int i;
 447                 tuner_dbg("bufs is: ");
 448                 for(i=0;i<6;i++)
 449                         printk("%x ",buf[i]);
 450                 printk("\n");
 451         }
 452
 453         ret=i2c_master_send(c,buf,6);
 454         if (ret!=6)
 455                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 456 }
 457
 458 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
 459 {
 460         struct tuner *t = i2c_get_clientdata(c);
 461         unsigned int if2;
 462
 463         if (t->std & V4L2_STD_525_60) {
 464                 // NTSC
 465                 if2 = 45750*1000;
 466         } else {
 467                 // PAL
 468                 if2 = 38900*1000;
 469         }
 470         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
 471                 // DVB (pinnacle 300i)
 472                 if2 = 36150*1000;
 473         }
 474         mt2050_set_if_freq(c, freq*62500, if2);
 475         mt2050_set_antenna(c, tv_antenna);
 476 }
 477
 478 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
 479 {
 480         struct tuner *t = i2c_get_clientdata(c);
 481         struct microtune_priv *priv = t->priv;
 482         int if2 = priv->radio_if2;
 483
 484         mt2050_set_if_freq(c, freq * 1000 / 16, if2);
 485         mt2050_set_antenna(c, radio_antenna);
 486 }
 487
 488 static struct tuner_operations mt2050_tuner_ops = {
 489         .set_tv_freq    = mt2050_set_tv_freq,
 490         .set_radio_freq = mt2050_set_radio_freq,
 491         .release        = microtune_release,
 492 };
 493
 494 static int mt2050_init(struct i2c_client *c)
 495 {
 496         struct tuner *t = i2c_get_clientdata(c);
 497         unsigned char buf[2];
 498         int ret;
 499
 500         buf[0]=6;
 501         buf[1]=0x10;
 502         ret=i2c_master_send(c,buf,2); //  power
 503
 504         buf[0]=0x0f;
 505         buf[1]=0x0f;
 506         ret=i2c_master_send(c,buf,2); // m1lo
 507
 508         buf[0]=0x0d;
 509         ret=i2c_master_send(c,buf,1);
 510         i2c_master_recv(c,buf,1);
 511
 512         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 513
 514         memcpy(&t->ops, &mt2050_tuner_ops, sizeof(struct tuner_operations));
 515
 516         return 0;
 517 }
 518
 519 int microtune_init(struct i2c_client *c)
 520 {
 521         struct microtune_priv *priv = NULL;
 522         struct tuner *t = i2c_get_clientdata(c);
 523         char *name;
 524         unsigned char buf[21];
 525         int company_code;
 526
 527         priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
 528         if (priv == NULL)
 529                 return -ENOMEM;
 530         t->priv = priv;
 531
 532         priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
 533
 534         memset(buf,0,sizeof(buf));
 535
 536         if (t->std & V4L2_STD_525_60) {
 537                 tuner_dbg("pinnacle ntsc\n");
 538                 priv->radio_if2 = 41300 * 1000;
 539         } else {
 540                 tuner_dbg("pinnacle pal\n");
 541                 priv->radio_if2 = 33300 * 1000;
 542         }
 543         name = "unknown";
 544
 545         i2c_master_send(c,buf,1);
 546         i2c_master_recv(c,buf,21);
 547         if (tuner_debug) {
 548                 int i;
 549                 tuner_dbg("MT20xx hexdump:");
 550                 for(i=0;i<21;i++) {
 551                         printk(" %02x",buf[i]);
 552                         if(((i+1)%8)==0) printk(" ");
 553                 }
 554                 printk("\n");
 555         }
 556         company_code = buf[0x11] << 8 | buf[0x12];
 557         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 558                    company_code,buf[0x13],buf[0x14]);
 559
 560
 561         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 562             NULL != microtune_part[buf[0x13]])
 563                 name = microtune_part[buf[0x13]];
 564         switch (buf[0x13]) {
 565         case MT2032:
 566                 mt2032_init(c);
 567                 break;
 568         case MT2050:
 569                 mt2050_init(c);
 570                 break;
 571         default:
 572                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 573                            name);
 574                 return 0;
 575         }
 576
 577         strlcpy(c->name, name, sizeof(c->name));
 578         tuner_info("microtune %s found, OK\n",name);
 579         return 0;
 580 }
 581
 582 /*
 583  * Overrides for Emacs so that we follow Linus's tabbing style.
 584  * ---------------------------------------------------------------------------
 585  * Local variables:
 586  * c-basic-offset: 8
 587  * End:
 588  */