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 "tuner-driver.h"
  10
  11 /* ---------------------------------------------------------------------- */
  12
  13 static unsigned int optimize_vco  = 1;
  14 module_param(optimize_vco,      int, 0644);
  15
  16 static unsigned int tv_antenna    = 1;
  17 module_param(tv_antenna,        int, 0644);
  18
  19 static unsigned int radio_antenna = 0;
  20 module_param(radio_antenna,     int, 0644);
  21
  22 /* from tuner-core.c */
  23 extern int tuner_debug;
  24
  25 /* ---------------------------------------------------------------------- */
  26
  27 #define MT2032 0x04
  28 #define MT2030 0x06
  29 #define MT2040 0x07
  30 #define MT2050 0x42
  31
  32 static char *microtune_part[] = {
  33         [ MT2030 ] = "MT2030",
  34         [ MT2032 ] = "MT2032",
  35         [ MT2040 ] = "MT2040",
  36         [ MT2050 ] = "MT2050",
  37 };
  38
  39 struct microtune_priv {
  40         unsigned int xogc;
  41         unsigned int radio_if2;
  42 };
  43
  44 static void microtune_release(struct i2c_client *c)
  45 {
  46         struct tuner *t = i2c_get_clientdata(c);
  47
  48         kfree(t->priv);
  49         t->priv = NULL;
  50 }
  51
  52 // IsSpurInBand()?
  53 static int mt2032_spurcheck(struct i2c_client *c,
  54                             int f1, int f2, int spectrum_from,int spectrum_to)
  55 {
  56         struct tuner *t = i2c_get_clientdata(c);
  57         int n1=1,n2,f;
  58
  59         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  60         f2=f2/1000;
  61         spectrum_from/=1000;
  62         spectrum_to/=1000;
  63
  64         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  65                   f1,f2,spectrum_from,spectrum_to);
  66
  67         do {
  68             n2=-n1;
  69             f=n1*(f1-f2);
  70             do {
  71                 n2--;
  72                 f=f-f2;
  73                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  74
  75                 if( (f>spectrum_from) && (f<spectrum_to))
  76                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  77             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  78             n1++;
  79         } while (n1<5);
  80
  81         return 1;
  82 }
  83
  84 static int mt2032_compute_freq(struct i2c_client *c,
  85                                unsigned int rfin,
  86                                unsigned int if1, unsigned int if2,
  87                                unsigned int spectrum_from,
  88                                unsigned int spectrum_to,
  89                                unsigned char *buf,
  90                                int *ret_sel,
  91                                unsigned int xogc) //all in Hz
  92 {
  93         struct tuner *t = i2c_get_clientdata(c);
  94         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
  95                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
  96
  97         fref= 5250 *1000; //5.25MHz
  98         desired_lo1=rfin+if1;
  99
 100         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
 101         lo1n=lo1/8;
 102         lo1a=lo1-(lo1n*8);
 103
 104         s=rfin/1000/1000+1090;
 105
 106         if(optimize_vco) {
 107                 if(s>1890) sel=0;
 108                 else if(s>1720) sel=1;
 109                 else if(s>1530) sel=2;
 110                 else if(s>1370) sel=3;
 111                 else sel=4; // >1090
 112         }
 113         else {
 114                 if(s>1790) sel=0; // <1958
 115                 else if(s>1617) sel=1;
 116                 else if(s>1449) sel=2;
 117                 else if(s>1291) sel=3;
 118                 else sel=4; // >1090
 119         }
 120         *ret_sel=sel;
 121
 122         lo1freq=(lo1a+8*lo1n)*fref;
 123
 124         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 125                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 126
 127         desired_lo2=lo1freq-rfin-if2;
 128         lo2=(desired_lo2)/fref;
 129         lo2n=lo2/8;
 130         lo2a=lo2-(lo2n*8);
 131         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 132         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 133
 134         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 135                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 136
 137         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
 138                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 139                            lo1a, lo1n, lo2a,lo2n);
 140                 return(-1);
 141         }
 142
 143         mt2032_spurcheck(c, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 144         // should recalculate lo1 (one step up/down)
 145
 146         // set up MT2032 register map for transfer over i2c
 147         buf[0]=lo1n-1;
 148         buf[1]=lo1a | (sel<<4);
 149         buf[2]=0x86; // LOGC
 150         buf[3]=0x0f; //reserved
 151         buf[4]=0x1f;
 152         buf[5]=(lo2n-1) | (lo2a<<5);
 153         if(rfin >400*1000*1000)
 154                 buf[6]=0xe4;
 155         else
 156                 buf[6]=0xf4; // set PKEN per rev 1.2
 157         buf[7]=8+xogc;
 158         buf[8]=0xc3; //reserved
 159         buf[9]=0x4e; //reserved
 160         buf[10]=0xec; //reserved
 161         buf[11]=(lo2num&0xff);
 162         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 163
 164         return 0;
 165 }
 166
 167 static int mt2032_check_lo_lock(struct i2c_client *c)
 168 {
 169         struct tuner *t = i2c_get_clientdata(c);
 170         int try,lock=0;
 171         unsigned char buf[2];
 172
 173         for(try=0;try<10;try++) {
 174                 buf[0]=0x0e;
 175                 i2c_master_send(c,buf,1);
 176                 i2c_master_recv(c,buf,1);
 177                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 178                 lock=buf[0] &0x06;
 179
 180                 if (lock==6)
 181                         break;
 182
 183                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 184                 udelay(1000);
 185         }
 186         return lock;
 187 }
 188
 189 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
 190 {
 191         struct tuner *t = i2c_get_clientdata(c);
 192         unsigned char buf[2];
 193         int tad1;
 194
 195         buf[0]=0x0f;
 196         i2c_master_send(c,buf,1);
 197         i2c_master_recv(c,buf,1);
 198         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 199         tad1=buf[0]&0x07;
 200
 201         if(tad1 ==0) return lock;
 202         if(tad1 ==1) return lock;
 203
 204         if(tad1==2) {
 205                 if(sel==0)
 206                         return lock;
 207                 else sel--;
 208         }
 209         else {
 210                 if(sel<4)
 211                         sel++;
 212                 else
 213                         return lock;
 214         }
 215
 216         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 217
 218         buf[0]=0x0f;
 219         buf[1]=sel;
 220         i2c_master_send(c,buf,2);
 221         lock=mt2032_check_lo_lock(c);
 222         return lock;
 223 }
 224
 225
 226 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
 227                                unsigned int if1, unsigned int if2,
 228                                unsigned int from, unsigned int to)
 229 {
 230         unsigned char buf[21];
 231         int lint_try,ret,sel,lock=0;
 232         struct tuner *t = i2c_get_clientdata(c);
 233         struct microtune_priv *priv = t->priv;
 234
 235         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 236                   rfin,if1,if2,from,to);
 237
 238         buf[0]=0;
 239         ret=i2c_master_send(c,buf,1);
 240         i2c_master_recv(c,buf,21);
 241
 242         buf[0]=0;
 243         ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
 244         if (ret<0)
 245                 return;
 246
 247         // send only the relevant registers per Rev. 1.2
 248         buf[0]=0;
 249         ret=i2c_master_send(c,buf,4);
 250         buf[5]=5;
 251         ret=i2c_master_send(c,buf+5,4);
 252         buf[11]=11;
 253         ret=i2c_master_send(c,buf+11,3);
 254         if(ret!=3)
 255                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 256
 257         // wait for PLLs to lock (per manual), retry LINT if not.
 258         for(lint_try=0; lint_try<2; lint_try++) {
 259                 lock=mt2032_check_lo_lock(c);
 260
 261                 if(optimize_vco)
 262                         lock=mt2032_optimize_vco(c,sel,lock);
 263                 if(lock==6) break;
 264
 265                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 266                 buf[0]=7;
 267                 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
 268                 i2c_master_send(c,buf,2);
 269                 mdelay(10);
 270                 buf[1]=8+priv->xogc;
 271                 i2c_master_send(c,buf,2);
 272         }
 273
 274         if (lock!=6)
 275                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 276
 277         buf[0]=2;
 278         buf[1]=0x20; // LOGC for optimal phase noise
 279         ret=i2c_master_send(c,buf,2);
 280         if (ret!=2)
 281                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 282 }
 283
 284
 285 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
 286 {
 287         struct tuner *t = i2c_get_clientdata(c);
 288         int if2,from,to;
 289
 290         // signal bandwidth and picture carrier
 291         if (t->std & V4L2_STD_525_60) {
 292                 // NTSC
 293                 from = 40750*1000;
 294                 to   = 46750*1000;
 295                 if2  = 45750*1000;
 296         } else {
 297                 // PAL
 298                 from = 32900*1000;
 299                 to   = 39900*1000;
 300                 if2  = 38900*1000;
 301         }
 302
 303         mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
 304                            1090*1000*1000, if2, from, to);
 305 }
 306
 307 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
 308 {
 309         struct tuner *t = i2c_get_clientdata(c);
 310         struct microtune_priv *priv = t->priv;
 311         int if2 = priv->radio_if2;
 312
 313         // per Manual for FM tuning: first if center freq. 1085 MHz
 314         mt2032_set_if_freq(c, freq * 1000 / 16,
 315                               1085*1000*1000,if2,if2,if2);
 316 }
 317
 318 static struct tuner_operations mt2032_tuner_ops = {
 319         .set_tv_freq    = mt2032_set_tv_freq,
 320         .set_radio_freq = mt2032_set_radio_freq,
 321         .release        = microtune_release,
 322 };
 323
 324 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 325 static int mt2032_init(struct i2c_client *c)
 326 {
 327         struct tuner *t = i2c_get_clientdata(c);
 328         struct microtune_priv *priv = t->priv;
 329         unsigned char buf[21];
 330         int ret,xogc,xok=0;
 331
 332         // Initialize Registers per spec.
 333         buf[1]=2; // Index to register 2
 334         buf[2]=0xff;
 335         buf[3]=0x0f;
 336         buf[4]=0x1f;
 337         ret=i2c_master_send(c,buf+1,4);
 338
 339         buf[5]=6; // Index register 6
 340         buf[6]=0xe4;
 341         buf[7]=0x8f;
 342         buf[8]=0xc3;
 343         buf[9]=0x4e;
 344         buf[10]=0xec;
 345         ret=i2c_master_send(c,buf+5,6);
 346
 347         buf[12]=13;  // Index register 13
 348         buf[13]=0x32;
 349         ret=i2c_master_send(c,buf+12,2);
 350
 351         // Adjust XOGC (register 7), wait for XOK
 352         xogc=7;
 353         do {
 354                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 355                 mdelay(10);
 356                 buf[0]=0x0e;
 357                 i2c_master_send(c,buf,1);
 358                 i2c_master_recv(c,buf,1);
 359                 xok=buf[0]&0x01;
 360                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 361                 if (xok == 1) break;
 362
 363                 xogc--;
 364                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 365                 if (xogc == 3) {
 366                         xogc=4; // min. 4 per spec
 367                         break;
 368                 }
 369                 buf[0]=0x07;
 370                 buf[1]=0x88 + xogc;
 371                 ret=i2c_master_send(c,buf,2);
 372                 if (ret!=2)
 373                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 374         } while (xok != 1 );
 375         priv->xogc=xogc;
 376
 377         memcpy(&t->ops, &mt2032_tuner_ops, sizeof(struct tuner_operations));
 378
 379         return(1);
 380 }
 381
 382 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
 383 {
 384         struct tuner *t = i2c_get_clientdata(c);
 385         unsigned char buf[2];
 386         int ret;
 387
 388         buf[0] = 6;
 389         buf[1] = antenna ? 0x11 : 0x10;
 390         ret=i2c_master_send(c,buf,2);
 391         tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 392 }
 393
 394 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
 395 {
 396         struct tuner *t = i2c_get_clientdata(c);
 397         unsigned int if1=1218*1000*1000;
 398         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 399         int ret;
 400         unsigned char buf[6];
 401
 402         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 403                   freq,if1,if2);
 404
 405         f_lo1=freq+if1;
 406         f_lo1=(f_lo1/1000000)*1000000;
 407
 408         f_lo2=f_lo1-freq-if2;
 409         f_lo2=(f_lo2/50000)*50000;
 410
 411         lo1=f_lo1/4000000;
 412         lo2=f_lo2/4000000;
 413
 414         f_lo1_modulo= f_lo1-(lo1*4000000);
 415         f_lo2_modulo= f_lo2-(lo2*4000000);
 416
 417         num1=4*f_lo1_modulo/4000000;
 418         num2=4096*(f_lo2_modulo/1000)/4000;
 419
 420         // todo spurchecks
 421
 422         div1a=(lo1/12)-1;
 423         div1b=lo1-(div1a+1)*12;
 424
 425         div2a=(lo2/8)-1;
 426         div2b=lo2-(div2a+1)*8;
 427
 428         if (tuner_debug > 1) {
 429                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 430                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 431                           num1,num2,div1a,div1b,div2a,div2b);
 432         }
 433
 434         buf[0]=1;
 435         buf[1]= 4*div1b + num1;
 436         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 437
 438         buf[2]=div1a;
 439         buf[3]=32*div2b + num2/256;
 440         buf[4]=num2-(num2/256)*256;
 441         buf[5]=div2a;
 442         if(num2!=0) buf[5]=buf[5]|0x40;
 443
 444         if (tuner_debug > 1) {
 445                 int i;
 446                 tuner_dbg("bufs is: ");
 447                 for(i=0;i<6;i++)
 448                         printk("%x ",buf[i]);
 449                 printk("\n");
 450         }
 451
 452         ret=i2c_master_send(c,buf,6);
 453         if (ret!=6)
 454                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 455 }
 456
 457 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
 458 {
 459         struct tuner *t = i2c_get_clientdata(c);
 460         unsigned int if2;
 461
 462         if (t->std & V4L2_STD_525_60) {
 463                 // NTSC
 464                 if2 = 45750*1000;
 465         } else {
 466                 // PAL
 467                 if2 = 38900*1000;
 468         }
 469         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
 470                 // DVB (pinnacle 300i)
 471                 if2 = 36150*1000;
 472         }
 473         mt2050_set_if_freq(c, freq*62500, if2);
 474         mt2050_set_antenna(c, tv_antenna);
 475 }
 476
 477 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
 478 {
 479         struct tuner *t = i2c_get_clientdata(c);
 480         struct microtune_priv *priv = t->priv;
 481         int if2 = priv->radio_if2;
 482
 483         mt2050_set_if_freq(c, freq * 1000 / 16, if2);
 484         mt2050_set_antenna(c, radio_antenna);
 485 }
 486
 487 static struct tuner_operations mt2050_tuner_ops = {
 488         .set_tv_freq    = mt2050_set_tv_freq,
 489         .set_radio_freq = mt2050_set_radio_freq,
 490         .release        = microtune_release,
 491 };
 492
 493 static int mt2050_init(struct i2c_client *c)
 494 {
 495         struct tuner *t = i2c_get_clientdata(c);
 496         unsigned char buf[2];
 497         int ret;
 498
 499         buf[0]=6;
 500         buf[1]=0x10;
 501         ret=i2c_master_send(c,buf,2); //  power
 502
 503         buf[0]=0x0f;
 504         buf[1]=0x0f;
 505         ret=i2c_master_send(c,buf,2); // m1lo
 506
 507         buf[0]=0x0d;
 508         ret=i2c_master_send(c,buf,1);
 509         i2c_master_recv(c,buf,1);
 510
 511         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 512
 513         memcpy(&t->ops, &mt2050_tuner_ops, sizeof(struct tuner_operations));
 514
 515         return 0;
 516 }
 517
 518 int microtune_init(struct i2c_client *c)
 519 {
 520         struct microtune_priv *priv = NULL;
 521         struct tuner *t = i2c_get_clientdata(c);
 522         char *name;
 523         unsigned char buf[21];
 524         int company_code;
 525
 526         priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
 527         if (priv == NULL)
 528                 return -ENOMEM;
 529         t->priv = priv;
 530
 531         priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
 532
 533         memset(buf,0,sizeof(buf));
 534
 535         if (t->std & V4L2_STD_525_60) {
 536                 tuner_dbg("pinnacle ntsc\n");
 537                 priv->radio_if2 = 41300 * 1000;
 538         } else {
 539                 tuner_dbg("pinnacle pal\n");
 540                 priv->radio_if2 = 33300 * 1000;
 541         }
 542         name = "unknown";
 543
 544         i2c_master_send(c,buf,1);
 545         i2c_master_recv(c,buf,21);
 546         if (tuner_debug) {
 547                 int i;
 548                 tuner_dbg("MT20xx hexdump:");
 549                 for(i=0;i<21;i++) {
 550                         printk(" %02x",buf[i]);
 551                         if(((i+1)%8)==0) printk(" ");
 552                 }
 553                 printk("\n");
 554         }
 555         company_code = buf[0x11] << 8 | buf[0x12];
 556         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 557                    company_code,buf[0x13],buf[0x14]);
 558
 559
 560         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 561             NULL != microtune_part[buf[0x13]])
 562                 name = microtune_part[buf[0x13]];
 563         switch (buf[0x13]) {
 564         case MT2032:
 565                 mt2032_init(c);
 566                 break;
 567         case MT2050:
 568                 mt2050_init(c);
 569                 break;
 570         default:
 571                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 572                            name);
 573                 return 0;
 574         }
 575
 576         strlcpy(c->name, name, sizeof(c->name));
 577         tuner_info("microtune %s found, OK\n",name);
 578         return 0;
 579 }
 580
 581 /*
 582  * Overrides for Emacs so that we follow Linus's tabbing style.
 583  * ---------------------------------------------------------------------------
 584  * Local variables:
 585  * c-basic-offset: 8
 586  * End:
 587  */