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