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 14static unsigned int optimize_vco = 1; 15module_param(optimize_vco, int, 0644); 16 17static unsigned int tv_antenna = 1; 18module_param(tv_antenna, int, 0644); 19 20static unsigned int radio_antenna = 0; 21module_param(radio_antenna, int, 0644); 22 23/* from tuner-core.c */ 24extern int tuner_debug; 25 26/* ---------------------------------------------------------------------- */ 27 28#define MT2032 0x04 29#define MT2030 0x06 30#define MT2040 0x07 31#define MT2050 0x42 32 33static char *microtune_part[] = { 34 [ MT2030 ] = "MT2030", 35 [ MT2032 ] = "MT2032", 36 [ MT2040 ] = "MT2040", 37 [ MT2050 ] = "MT2050", 38}; 39 40// IsSpurInBand()? 41static 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 72static 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 155static 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 177static 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 214static 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 272static 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 294static 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 305static 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 361static 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 373static 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 436static 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 456static 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 465static 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 489int 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 */ 553