err.no 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 "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         struct tuner_i2c_props i2c_props;
  41
  42         unsigned int xogc;
  43         unsigned int radio_if2;
  44 };
  45
  46 static void microtune_release(struct tuner *t)
  47 {
  48         kfree(t->priv);
  49         t->priv = NULL;
  50 }
  51
  52 // IsSpurInBand()?
  53 static int mt2032_spurcheck(struct tuner *t,
  54                             int f1, int f2, int spectrum_from,int spectrum_to)
  55 {
  56         int n1=1,n2,f;
  57
  58         f1=f1/1000; //scale to kHz to avoid 32bit overflows
  59         f2=f2/1000;
  60         spectrum_from/=1000;
  61         spectrum_to/=1000;
  62
  63         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
  64                   f1,f2,spectrum_from,spectrum_to);
  65
  66         do {
  67             n2=-n1;
  68             f=n1*(f1-f2);
  69             do {
  70                 n2--;
  71                 f=f-f2;
  72                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
  73
  74                 if( (f>spectrum_from) && (f<spectrum_to))
  75                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
  76             } while ( (f>(f2-spectrum_to)) || (n2>-5));
  77             n1++;
  78         } while (n1<5);
  79
  80         return 1;
  81 }
  82
  83 static int mt2032_compute_freq(struct tuner *t,
  84                                unsigned int rfin,
  85                                unsigned int if1, unsigned int if2,
  86                                unsigned int spectrum_from,
  87                                unsigned int spectrum_to,
  88                                unsigned char *buf,
  89                                int *ret_sel,
  90                                unsigned int xogc) //all in Hz
  91 {
  92         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
  93                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
  94
  95         fref= 5250 *1000; //5.25MHz
  96         desired_lo1=rfin+if1;
  97
  98         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
  99         lo1n=lo1/8;
 100         lo1a=lo1-(lo1n*8);
 101
 102         s=rfin/1000/1000+1090;
 103
 104         if(optimize_vco) {
 105                 if(s>1890) sel=0;
 106                 else if(s>1720) sel=1;
 107                 else if(s>1530) sel=2;
 108                 else if(s>1370) sel=3;
 109                 else sel=4; // >1090
 110         }
 111         else {
 112                 if(s>1790) sel=0; // <1958
 113                 else if(s>1617) sel=1;
 114                 else if(s>1449) sel=2;
 115                 else if(s>1291) sel=3;
 116                 else sel=4; // >1090
 117         }
 118         *ret_sel=sel;
 119
 120         lo1freq=(lo1a+8*lo1n)*fref;
 121
 122         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
 123                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
 124
 125         desired_lo2=lo1freq-rfin-if2;
 126         lo2=(desired_lo2)/fref;
 127         lo2n=lo2/8;
 128         lo2a=lo2-(lo2n*8);
 129         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
 130         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
 131
 132         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
 133                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
 134
 135         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
 136                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
 137                            lo1a, lo1n, lo2a,lo2n);
 138                 return(-1);
 139         }
 140
 141         mt2032_spurcheck(t, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
 142         // should recalculate lo1 (one step up/down)
 143
 144         // set up MT2032 register map for transfer over i2c
 145         buf[0]=lo1n-1;
 146         buf[1]=lo1a | (sel<<4);
 147         buf[2]=0x86; // LOGC
 148         buf[3]=0x0f; //reserved
 149         buf[4]=0x1f;
 150         buf[5]=(lo2n-1) | (lo2a<<5);
 151         if(rfin >400*1000*1000)
 152                 buf[6]=0xe4;
 153         else
 154                 buf[6]=0xf4; // set PKEN per rev 1.2
 155         buf[7]=8+xogc;
 156         buf[8]=0xc3; //reserved
 157         buf[9]=0x4e; //reserved
 158         buf[10]=0xec; //reserved
 159         buf[11]=(lo2num&0xff);
 160         buf[12]=(lo2num>>8) |0x80; // Lo2RST
 161
 162         return 0;
 163 }
 164
 165 static int mt2032_check_lo_lock(struct tuner *t)
 166 {
 167         struct microtune_priv *priv = t->priv;
 168         int try,lock=0;
 169         unsigned char buf[2];
 170
 171         for(try=0;try<10;try++) {
 172                 buf[0]=0x0e;
 173                 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 174                 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 175                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
 176                 lock=buf[0] &0x06;
 177
 178                 if (lock==6)
 179                         break;
 180
 181                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
 182                 udelay(1000);
 183         }
 184         return lock;
 185 }
 186
 187 static int mt2032_optimize_vco(struct tuner *t,int sel,int lock)
 188 {
 189         struct microtune_priv *priv = t->priv;
 190         unsigned char buf[2];
 191         int tad1;
 192
 193         buf[0]=0x0f;
 194         tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 195         tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 196         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
 197         tad1=buf[0]&0x07;
 198
 199         if(tad1 ==0) return lock;
 200         if(tad1 ==1) return lock;
 201
 202         if(tad1==2) {
 203                 if(sel==0)
 204                         return lock;
 205                 else sel--;
 206         }
 207         else {
 208                 if(sel<4)
 209                         sel++;
 210                 else
 211                         return lock;
 212         }
 213
 214         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
 215
 216         buf[0]=0x0f;
 217         buf[1]=sel;
 218         tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 219         lock=mt2032_check_lo_lock(t);
 220         return lock;
 221 }
 222
 223
 224 static void mt2032_set_if_freq(struct tuner *t, unsigned int rfin,
 225                                unsigned int if1, unsigned int if2,
 226                                unsigned int from, unsigned int to)
 227 {
 228         unsigned char buf[21];
 229         int lint_try,ret,sel,lock=0;
 230         struct microtune_priv *priv = t->priv;
 231
 232         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
 233                   rfin,if1,if2,from,to);
 234
 235         buf[0]=0;
 236         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 237         tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
 238
 239         buf[0]=0;
 240         ret=mt2032_compute_freq(t,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
 241         if (ret<0)
 242                 return;
 243
 244         // send only the relevant registers per Rev. 1.2
 245         buf[0]=0;
 246         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4);
 247         buf[5]=5;
 248         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4);
 249         buf[11]=11;
 250         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3);
 251         if(ret!=3)
 252                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
 253
 254         // wait for PLLs to lock (per manual), retry LINT if not.
 255         for(lint_try=0; lint_try<2; lint_try++) {
 256                 lock=mt2032_check_lo_lock(t);
 257
 258                 if(optimize_vco)
 259                         lock=mt2032_optimize_vco(t,sel,lock);
 260                 if(lock==6) break;
 261
 262                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
 263                 buf[0]=7;
 264                 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
 265                 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 266                 mdelay(10);
 267                 buf[1]=8+priv->xogc;
 268                 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 269         }
 270
 271         if (lock!=6)
 272                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
 273
 274         buf[0]=2;
 275         buf[1]=0x20; // LOGC for optimal phase noise
 276         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 277         if (ret!=2)
 278                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 279 }
 280
 281
 282 static void mt2032_set_tv_freq(struct tuner *t, unsigned int freq)
 283 {
 284         int if2,from,to;
 285
 286         // signal bandwidth and picture carrier
 287         if (t->std & V4L2_STD_525_60) {
 288                 // NTSC
 289                 from = 40750*1000;
 290                 to   = 46750*1000;
 291                 if2  = 45750*1000;
 292         } else {
 293                 // PAL
 294                 from = 32900*1000;
 295                 to   = 39900*1000;
 296                 if2  = 38900*1000;
 297         }
 298
 299         mt2032_set_if_freq(t, freq*62500 /* freq*1000*1000/16 */,
 300                            1090*1000*1000, if2, from, to);
 301 }
 302
 303 static void mt2032_set_radio_freq(struct tuner *t, unsigned int freq)
 304 {
 305         struct microtune_priv *priv = t->priv;
 306         int if2 = priv->radio_if2;
 307
 308         // per Manual for FM tuning: first if center freq. 1085 MHz
 309         mt2032_set_if_freq(t, freq * 1000 / 16,
 310                               1085*1000*1000,if2,if2,if2);
 311 }
 312
 313 static struct tuner_operations mt2032_tuner_ops = {
 314         .set_tv_freq    = mt2032_set_tv_freq,
 315         .set_radio_freq = mt2032_set_radio_freq,
 316         .release        = microtune_release,
 317 };
 318
 319 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
 320 static int mt2032_init(struct tuner *t)
 321 {
 322         struct microtune_priv *priv = t->priv;
 323         unsigned char buf[21];
 324         int ret,xogc,xok=0;
 325
 326         // Initialize Registers per spec.
 327         buf[1]=2; // Index to register 2
 328         buf[2]=0xff;
 329         buf[3]=0x0f;
 330         buf[4]=0x1f;
 331         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4);
 332
 333         buf[5]=6; // Index register 6
 334         buf[6]=0xe4;
 335         buf[7]=0x8f;
 336         buf[8]=0xc3;
 337         buf[9]=0x4e;
 338         buf[10]=0xec;
 339         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6);
 340
 341         buf[12]=13;  // Index register 13
 342         buf[13]=0x32;
 343         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2);
 344
 345         // Adjust XOGC (register 7), wait for XOK
 346         xogc=7;
 347         do {
 348                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 349                 mdelay(10);
 350                 buf[0]=0x0e;
 351                 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 352                 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 353                 xok=buf[0]&0x01;
 354                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
 355                 if (xok == 1) break;
 356
 357                 xogc--;
 358                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
 359                 if (xogc == 3) {
 360                         xogc=4; // min. 4 per spec
 361                         break;
 362                 }
 363                 buf[0]=0x07;
 364                 buf[1]=0x88 + xogc;
 365                 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 366                 if (ret!=2)
 367                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
 368         } while (xok != 1 );
 369         priv->xogc=xogc;
 370
 371         memcpy(&t->ops, &mt2032_tuner_ops, sizeof(struct tuner_operations));
 372
 373         return(1);
 374 }
 375
 376 static void mt2050_set_antenna(struct tuner *t, unsigned char antenna)
 377 {
 378         struct microtune_priv *priv = t->priv;
 379         unsigned char buf[2];
 380         int ret;
 381
 382         buf[0] = 6;
 383         buf[1] = antenna ? 0x11 : 0x10;
 384         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
 385         tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
 386 }
 387
 388 static void mt2050_set_if_freq(struct tuner *t,unsigned int freq, unsigned int if2)
 389 {
 390         struct microtune_priv *priv = t->priv;
 391         unsigned int if1=1218*1000*1000;
 392         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
 393         int ret;
 394         unsigned char buf[6];
 395
 396         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
 397                   freq,if1,if2);
 398
 399         f_lo1=freq+if1;
 400         f_lo1=(f_lo1/1000000)*1000000;
 401
 402         f_lo2=f_lo1-freq-if2;
 403         f_lo2=(f_lo2/50000)*50000;
 404
 405         lo1=f_lo1/4000000;
 406         lo2=f_lo2/4000000;
 407
 408         f_lo1_modulo= f_lo1-(lo1*4000000);
 409         f_lo2_modulo= f_lo2-(lo2*4000000);
 410
 411         num1=4*f_lo1_modulo/4000000;
 412         num2=4096*(f_lo2_modulo/1000)/4000;
 413
 414         // todo spurchecks
 415
 416         div1a=(lo1/12)-1;
 417         div1b=lo1-(div1a+1)*12;
 418
 419         div2a=(lo2/8)-1;
 420         div2b=lo2-(div2a+1)*8;
 421
 422         if (tuner_debug > 1) {
 423                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
 424                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
 425                           num1,num2,div1a,div1b,div2a,div2b);
 426         }
 427
 428         buf[0]=1;
 429         buf[1]= 4*div1b + num1;
 430         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
 431
 432         buf[2]=div1a;
 433         buf[3]=32*div2b + num2/256;
 434         buf[4]=num2-(num2/256)*256;
 435         buf[5]=div2a;
 436         if(num2!=0) buf[5]=buf[5]|0x40;
 437
 438         if (tuner_debug > 1) {
 439                 int i;
 440                 tuner_dbg("bufs is: ");
 441                 for(i=0;i<6;i++)
 442                         printk("%x ",buf[i]);
 443                 printk("\n");
 444         }
 445
 446         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6);
 447         if (ret!=6)
 448                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
 449 }
 450
 451 static void mt2050_set_tv_freq(struct tuner *t, unsigned int freq)
 452 {
 453         unsigned int if2;
 454
 455         if (t->std & V4L2_STD_525_60) {
 456                 // NTSC
 457                 if2 = 45750*1000;
 458         } else {
 459                 // PAL
 460                 if2 = 38900*1000;
 461         }
 462         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
 463                 // DVB (pinnacle 300i)
 464                 if2 = 36150*1000;
 465         }
 466         mt2050_set_if_freq(t, freq*62500, if2);
 467         mt2050_set_antenna(t, tv_antenna);
 468 }
 469
 470 static void mt2050_set_radio_freq(struct tuner *t, unsigned int freq)
 471 {
 472         struct microtune_priv *priv = t->priv;
 473         int if2 = priv->radio_if2;
 474
 475         mt2050_set_if_freq(t, freq * 1000 / 16, if2);
 476         mt2050_set_antenna(t, radio_antenna);
 477 }
 478
 479 static struct tuner_operations mt2050_tuner_ops = {
 480         .set_tv_freq    = mt2050_set_tv_freq,
 481         .set_radio_freq = mt2050_set_radio_freq,
 482         .release        = microtune_release,
 483 };
 484
 485 static int mt2050_init(struct tuner *t)
 486 {
 487         struct microtune_priv *priv = t->priv;
 488         unsigned char buf[2];
 489         int ret;
 490
 491         buf[0]=6;
 492         buf[1]=0x10;
 493         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); //  power
 494
 495         buf[0]=0x0f;
 496         buf[1]=0x0f;
 497         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // m1lo
 498
 499         buf[0]=0x0d;
 500         ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 501         tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
 502
 503         tuner_dbg("mt2050: sro is %x\n",buf[0]);
 504
 505         memcpy(&t->ops, &mt2050_tuner_ops, sizeof(struct tuner_operations));
 506
 507         return 0;
 508 }
 509
 510 int microtune_init(struct tuner *t)
 511 {
 512         struct microtune_priv *priv = NULL;
 513         char *name;
 514         unsigned char buf[21];
 515         int company_code;
 516
 517         priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
 518         if (priv == NULL)
 519                 return -ENOMEM;
 520         t->priv = priv;
 521
 522         priv->i2c_props.addr = t->i2c.addr;
 523         priv->i2c_props.adap = t->i2c.adapter;
 524
 525         priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
 526
 527         memset(buf,0,sizeof(buf));
 528
 529         if (t->std & V4L2_STD_525_60) {
 530                 tuner_dbg("pinnacle ntsc\n");
 531                 priv->radio_if2 = 41300 * 1000;
 532         } else {
 533                 tuner_dbg("pinnacle pal\n");
 534                 priv->radio_if2 = 33300 * 1000;
 535         }
 536         name = "unknown";
 537
 538         tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
 539         tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
 540         if (tuner_debug) {
 541                 int i;
 542                 tuner_dbg("MT20xx hexdump:");
 543                 for(i=0;i<21;i++) {
 544                         printk(" %02x",buf[i]);
 545                         if(((i+1)%8)==0) printk(" ");
 546                 }
 547                 printk("\n");
 548         }
 549         company_code = buf[0x11] << 8 | buf[0x12];
 550         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
 551                    company_code,buf[0x13],buf[0x14]);
 552
 553
 554         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
 555             NULL != microtune_part[buf[0x13]])
 556                 name = microtune_part[buf[0x13]];
 557         switch (buf[0x13]) {
 558         case MT2032:
 559                 mt2032_init(t);
 560                 break;
 561         case MT2050:
 562                 mt2050_init(t);
 563                 break;
 564         default:
 565                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
 566                            name);
 567                 return 0;
 568         }
 569
 570         strlcpy(t->i2c.name, name, sizeof(t->i2c.name));
 571         tuner_info("microtune %s found, OK\n",name);
 572         return 0;
 573 }
 574
 575 /*
 576  * Overrides for Emacs so that we follow Linus's tabbing style.
 577  * ---------------------------------------------------------------------------
 578  * Local variables:
 579  * c-basic-offset: 8
 580  * End:
 581  */