1 /* 2 * i2c tv tuner chip device driver 3 * controls microtune tuners, mt2032 + mt2050 at the moment. 4 * 5 * This "mt20xx" module was split apart from the original "tuner" module. 6 */ 7 #include <linux/delay.h> 8 #include <linux/i2c.h> 9 #include <linux/slab.h> 10 #include <linux/videodev2.h> 11 #include "tuner-i2c.h" 12 #include "mt20xx.h" 13 14 static int debug; 15 module_param(debug, int, 0644); 16 MODULE_PARM_DESC(debug, "enable verbose debug messages"); 17 18 /* ---------------------------------------------------------------------- */ 19 20 static unsigned int optimize_vco = 1; 21 module_param(optimize_vco, int, 0644); 22 23 static unsigned int tv_antenna = 1; 24 module_param(tv_antenna, int, 0644); 25 26 static unsigned int radio_antenna; 27 module_param(radio_antenna, int, 0644); 28 29 /* ---------------------------------------------------------------------- */ 30 31 #define MT2032 0x04 32 #define MT2030 0x06 33 #define MT2040 0x07 34 #define MT2050 0x42 35 36 static char *microtune_part[] = { 37 [ MT2030 ] = "MT2030", 38 [ MT2032 ] = "MT2032", 39 [ MT2040 ] = "MT2040", 40 [ MT2050 ] = "MT2050", 41 }; 42 43 struct microtune_priv { 44 struct tuner_i2c_props i2c_props; 45 46 unsigned int xogc; 47 //unsigned int radio_if2; 48 49 u32 frequency; 50 }; 51 52 static void microtune_release(struct dvb_frontend *fe) 53 { 54 kfree(fe->tuner_priv); 55 fe->tuner_priv = NULL; 56 } 57 58 static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency) 59 { 60 struct microtune_priv *priv = fe->tuner_priv; 61 *frequency = priv->frequency; 62 return 0; 63 } 64 65 // IsSpurInBand()? 66 static int mt2032_spurcheck(struct dvb_frontend *fe, 67 int f1, int f2, int spectrum_from,int spectrum_to) 68 { 69 struct microtune_priv *priv = fe->tuner_priv; 70 int n1=1,n2,f; 71 72 f1=f1/1000; //scale to kHz to avoid 32bit overflows 73 f2=f2/1000; 74 spectrum_from/=1000; 75 spectrum_to/=1000; 76 77 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n", 78 f1,f2,spectrum_from,spectrum_to); 79 80 do { 81 n2=-n1; 82 f=n1*(f1-f2); 83 do { 84 n2--; 85 f=f-f2; 86 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f); 87 88 if( (f>spectrum_from) && (f<spectrum_to)) 89 tuner_dbg("mt2032 spurcheck triggered: %d\n",n1); 90 } while ( (f>(f2-spectrum_to)) || (n2>-5)); 91 n1++; 92 } while (n1<5); 93 94 return 1; 95 } 96 97 static int mt2032_compute_freq(struct dvb_frontend *fe, 98 unsigned int rfin, 99 unsigned int if1, unsigned int if2, 100 unsigned int spectrum_from, 101 unsigned int spectrum_to, 102 unsigned char *buf, 103 int *ret_sel, 104 unsigned int xogc) //all in Hz 105 { 106 struct microtune_priv *priv = fe->tuner_priv; 107 unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1, 108 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq; 109 110 fref= 5250 *1000; //5.25MHz 111 desired_lo1=rfin+if1; 112 113 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000); 114 lo1n=lo1/8; 115 lo1a=lo1-(lo1n*8); 116 117 s=rfin/1000/1000+1090; 118 119 if(optimize_vco) { 120 if(s>1890) sel=0; 121 else if(s>1720) sel=1; 122 else if(s>1530) sel=2; 123 else if(s>1370) sel=3; 124 else sel=4; // >1090 125 } 126 else { 127 if(s>1790) sel=0; // <1958 128 else if(s>1617) sel=1; 129 else if(s>1449) sel=2; 130 else if(s>1291) sel=3; 131 else sel=4; // >1090 132 } 133 *ret_sel=sel; 134 135 lo1freq=(lo1a+8*lo1n)*fref; 136 137 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n", 138 rfin,lo1,lo1n,lo1a,sel,lo1freq); 139 140 desired_lo2=lo1freq-rfin-if2; 141 lo2=(desired_lo2)/fref; 142 lo2n=lo2/8; 143 lo2a=lo2-(lo2n*8); 144 lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith 145 lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000; 146 147 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n", 148 rfin,lo2,lo2n,lo2a,lo2num,lo2freq); 149 150 if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 || 151 lo2n > 30) { 152 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n", 153 lo1a, lo1n, lo2a,lo2n); 154 return(-1); 155 } 156 157 mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to); 158 // should recalculate lo1 (one step up/down) 159 160 // set up MT2032 register map for transfer over i2c 161 buf[0]=lo1n-1; 162 buf[1]=lo1a | (sel<<4); 163 buf[2]=0x86; // LOGC 164 buf[3]=0x0f; //reserved 165 buf[4]=0x1f; 166 buf[5]=(lo2n-1) | (lo2a<<5); 167 if(rfin >400*1000*1000) 168 buf[6]=0xe4; 169 else 170 buf[6]=0xf4; // set PKEN per rev 1.2 171 buf[7]=8+xogc; 172 buf[8]=0xc3; //reserved 173 buf[9]=0x4e; //reserved 174 buf[10]=0xec; //reserved 175 buf[11]=(lo2num&0xff); 176 buf[12]=(lo2num>>8) |0x80; // Lo2RST 177 178 return 0; 179 } 180 181 static int mt2032_check_lo_lock(struct dvb_frontend *fe) 182 { 183 struct microtune_priv *priv = fe->tuner_priv; 184 int try,lock=0; 185 unsigned char buf[2]; 186 187 for(try=0;try<10;try++) { 188 buf[0]=0x0e; 189 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 190 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 191 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]); 192 lock=buf[0] &0x06; 193 194 if (lock==6) 195 break; 196 197 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]); 198 udelay(1000); 199 } 200 return lock; 201 } 202 203 static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock) 204 { 205 struct microtune_priv *priv = fe->tuner_priv; 206 unsigned char buf[2]; 207 int tad1; 208 209 buf[0]=0x0f; 210 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 211 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 212 tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]); 213 tad1=buf[0]&0x07; 214 215 if(tad1 ==0) return lock; 216 if(tad1 ==1) return lock; 217 218 if(tad1==2) { 219 if(sel==0) 220 return lock; 221 else sel--; 222 } 223 else { 224 if(sel<4) 225 sel++; 226 else 227 return lock; 228 } 229 230 tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel); 231 232 buf[0]=0x0f; 233 buf[1]=sel; 234 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 235 lock=mt2032_check_lo_lock(fe); 236 return lock; 237 } 238 239 240 static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin, 241 unsigned int if1, unsigned int if2, 242 unsigned int from, unsigned int to) 243 { 244 unsigned char buf[21]; 245 int lint_try,ret,sel,lock=0; 246 struct microtune_priv *priv = fe->tuner_priv; 247 248 tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n", 249 rfin,if1,if2,from,to); 250 251 buf[0]=0; 252 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 253 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); 254 255 buf[0]=0; 256 ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc); 257 if (ret<0) 258 return; 259 260 // send only the relevant registers per Rev. 1.2 261 buf[0]=0; 262 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4); 263 buf[5]=5; 264 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4); 265 buf[11]=11; 266 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3); 267 if(ret!=3) 268 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret); 269 270 // wait for PLLs to lock (per manual), retry LINT if not. 271 for(lint_try=0; lint_try<2; lint_try++) { 272 lock=mt2032_check_lo_lock(fe); 273 274 if(optimize_vco) 275 lock=mt2032_optimize_vco(fe,sel,lock); 276 if(lock==6) break; 277 278 tuner_dbg("mt2032: re-init PLLs by LINT\n"); 279 buf[0]=7; 280 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs 281 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 282 mdelay(10); 283 buf[1]=8+priv->xogc; 284 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 285 } 286 287 if (lock!=6) 288 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n"); 289 290 buf[0]=2; 291 buf[1]=0x20; // LOGC for optimal phase noise 292 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 293 if (ret!=2) 294 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); 295 } 296 297 298 static int mt2032_set_tv_freq(struct dvb_frontend *fe, 299 struct analog_parameters *params) 300 { 301 int if2,from,to; 302 303 // signal bandwidth and picture carrier 304 if (params->std & V4L2_STD_525_60) { 305 // NTSC 306 from = 40750*1000; 307 to = 46750*1000; 308 if2 = 45750*1000; 309 } else { 310 // PAL 311 from = 32900*1000; 312 to = 39900*1000; 313 if2 = 38900*1000; 314 } 315 316 mt2032_set_if_freq(fe, params->frequency*62500, 317 1090*1000*1000, if2, from, to); 318 319 return 0; 320 } 321 322 static int mt2032_set_radio_freq(struct dvb_frontend *fe, 323 struct analog_parameters *params) 324 { 325 struct microtune_priv *priv = fe->tuner_priv; 326 int if2; 327 328 if (params->std & V4L2_STD_525_60) { 329 tuner_dbg("pinnacle ntsc\n"); 330 if2 = 41300 * 1000; 331 } else { 332 tuner_dbg("pinnacle pal\n"); 333 if2 = 33300 * 1000; 334 } 335 336 // per Manual for FM tuning: first if center freq. 1085 MHz 337 mt2032_set_if_freq(fe, params->frequency * 125 / 2, 338 1085*1000*1000,if2,if2,if2); 339 340 return 0; 341 } 342 343 static int mt2032_set_params(struct dvb_frontend *fe, 344 struct analog_parameters *params) 345 { 346 struct microtune_priv *priv = fe->tuner_priv; 347 int ret = -EINVAL; 348 349 switch (params->mode) { 350 case V4L2_TUNER_RADIO: 351 ret = mt2032_set_radio_freq(fe, params); 352 priv->frequency = params->frequency * 125 / 2; 353 break; 354 case V4L2_TUNER_ANALOG_TV: 355 case V4L2_TUNER_DIGITAL_TV: 356 ret = mt2032_set_tv_freq(fe, params); 357 priv->frequency = params->frequency * 62500; 358 break; 359 } 360 361 return ret; 362 } 363 364 static const struct dvb_tuner_ops mt2032_tuner_ops = { 365 .set_analog_params = mt2032_set_params, 366 .release = microtune_release, 367 .get_frequency = microtune_get_frequency, 368 }; 369 370 // Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001 371 static int mt2032_init(struct dvb_frontend *fe) 372 { 373 struct microtune_priv *priv = fe->tuner_priv; 374 unsigned char buf[21]; 375 int ret,xogc,xok=0; 376 377 // Initialize Registers per spec. 378 buf[1]=2; // Index to register 2 379 buf[2]=0xff; 380 buf[3]=0x0f; 381 buf[4]=0x1f; 382 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4); 383 384 buf[5]=6; // Index register 6 385 buf[6]=0xe4; 386 buf[7]=0x8f; 387 buf[8]=0xc3; 388 buf[9]=0x4e; 389 buf[10]=0xec; 390 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6); 391 392 buf[12]=13; // Index register 13 393 buf[13]=0x32; 394 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2); 395 396 // Adjust XOGC (register 7), wait for XOK 397 xogc=7; 398 do { 399 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); 400 mdelay(10); 401 buf[0]=0x0e; 402 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 403 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 404 xok=buf[0]&0x01; 405 tuner_dbg("mt2032: xok = 0x%02x\n",xok); 406 if (xok == 1) break; 407 408 xogc--; 409 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); 410 if (xogc == 3) { 411 xogc=4; // min. 4 per spec 412 break; 413 } 414 buf[0]=0x07; 415 buf[1]=0x88 + xogc; 416 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 417 if (ret!=2) 418 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); 419 } while (xok != 1 ); 420 priv->xogc=xogc; 421 422 memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops)); 423 424 return(1); 425 } 426 427 static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna) 428 { 429 struct microtune_priv *priv = fe->tuner_priv; 430 unsigned char buf[2]; 431 432 buf[0] = 6; 433 buf[1] = antenna ? 0x11 : 0x10; 434 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); 435 tuner_dbg("mt2050: enabled antenna connector %d\n", antenna); 436 } 437 438 static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2) 439 { 440 struct microtune_priv *priv = fe->tuner_priv; 441 unsigned int if1=1218*1000*1000; 442 unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b; 443 int ret; 444 unsigned char buf[6]; 445 446 tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n", 447 freq,if1,if2); 448 449 f_lo1=freq+if1; 450 f_lo1=(f_lo1/1000000)*1000000; 451 452 f_lo2=f_lo1-freq-if2; 453 f_lo2=(f_lo2/50000)*50000; 454 455 lo1=f_lo1/4000000; 456 lo2=f_lo2/4000000; 457 458 f_lo1_modulo= f_lo1-(lo1*4000000); 459 f_lo2_modulo= f_lo2-(lo2*4000000); 460 461 num1=4*f_lo1_modulo/4000000; 462 num2=4096*(f_lo2_modulo/1000)/4000; 463 464 // todo spurchecks 465 466 div1a=(lo1/12)-1; 467 div1b=lo1-(div1a+1)*12; 468 469 div2a=(lo2/8)-1; 470 div2b=lo2-(div2a+1)*8; 471 472 if (debug > 1) { 473 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2); 474 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n", 475 num1,num2,div1a,div1b,div2a,div2b); 476 } 477 478 buf[0]=1; 479 buf[1]= 4*div1b + num1; 480 if(freq<275*1000*1000) buf[1] = buf[1]|0x80; 481 482 buf[2]=div1a; 483 buf[3]=32*div2b + num2/256; 484 buf[4]=num2-(num2/256)*256; 485 buf[5]=div2a; 486 if(num2!=0) buf[5]=buf[5]|0x40; 487 488 if (debug > 1) 489 tuner_dbg("bufs is: %*ph\n", 6, buf); 490 491 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6); 492 if (ret!=6) 493 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret); 494 } 495 496 static int mt2050_set_tv_freq(struct dvb_frontend *fe, 497 struct analog_parameters *params) 498 { 499 unsigned int if2; 500 501 if (params->std & V4L2_STD_525_60) { 502 // NTSC 503 if2 = 45750*1000; 504 } else { 505 // PAL 506 if2 = 38900*1000; 507 } 508 if (V4L2_TUNER_DIGITAL_TV == params->mode) { 509 // DVB (pinnacle 300i) 510 if2 = 36150*1000; 511 } 512 mt2050_set_if_freq(fe, params->frequency*62500, if2); 513 mt2050_set_antenna(fe, tv_antenna); 514 515 return 0; 516 } 517 518 static int mt2050_set_radio_freq(struct dvb_frontend *fe, 519 struct analog_parameters *params) 520 { 521 struct microtune_priv *priv = fe->tuner_priv; 522 int if2; 523 524 if (params->std & V4L2_STD_525_60) { 525 tuner_dbg("pinnacle ntsc\n"); 526 if2 = 41300 * 1000; 527 } else { 528 tuner_dbg("pinnacle pal\n"); 529 if2 = 33300 * 1000; 530 } 531 532 mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2); 533 mt2050_set_antenna(fe, radio_antenna); 534 535 return 0; 536 } 537 538 static int mt2050_set_params(struct dvb_frontend *fe, 539 struct analog_parameters *params) 540 { 541 struct microtune_priv *priv = fe->tuner_priv; 542 int ret = -EINVAL; 543 544 switch (params->mode) { 545 case V4L2_TUNER_RADIO: 546 ret = mt2050_set_radio_freq(fe, params); 547 priv->frequency = params->frequency * 125 / 2; 548 break; 549 case V4L2_TUNER_ANALOG_TV: 550 case V4L2_TUNER_DIGITAL_TV: 551 ret = mt2050_set_tv_freq(fe, params); 552 priv->frequency = params->frequency * 62500; 553 break; 554 } 555 556 return ret; 557 } 558 559 static const struct dvb_tuner_ops mt2050_tuner_ops = { 560 .set_analog_params = mt2050_set_params, 561 .release = microtune_release, 562 .get_frequency = microtune_get_frequency, 563 }; 564 565 static int mt2050_init(struct dvb_frontend *fe) 566 { 567 struct microtune_priv *priv = fe->tuner_priv; 568 unsigned char buf[2]; 569 570 buf[0] = 6; 571 buf[1] = 0x10; 572 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */ 573 574 buf[0] = 0x0f; 575 buf[1] = 0x0f; 576 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */ 577 578 buf[0] = 0x0d; 579 tuner_i2c_xfer_send(&priv->i2c_props, buf, 1); 580 tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1); 581 582 tuner_dbg("mt2050: sro is %x\n", buf[0]); 583 584 memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops)); 585 586 return 0; 587 } 588 589 struct dvb_frontend *microtune_attach(struct dvb_frontend *fe, 590 struct i2c_adapter* i2c_adap, 591 u8 i2c_addr) 592 { 593 struct microtune_priv *priv = NULL; 594 char *name; 595 unsigned char buf[21]; 596 int company_code; 597 598 priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL); 599 if (priv == NULL) 600 return NULL; 601 fe->tuner_priv = priv; 602 603 priv->i2c_props.addr = i2c_addr; 604 priv->i2c_props.adap = i2c_adap; 605 priv->i2c_props.name = "mt20xx"; 606 607 //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */ 608 609 memset(buf,0,sizeof(buf)); 610 611 name = "unknown"; 612 613 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 614 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); 615 if (debug) 616 tuner_dbg("MT20xx hexdump: %*ph\n", 21, buf); 617 618 company_code = buf[0x11] << 8 | buf[0x12]; 619 tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n", 620 company_code,buf[0x13],buf[0x14]); 621 622 623 if (buf[0x13] < ARRAY_SIZE(microtune_part) && 624 NULL != microtune_part[buf[0x13]]) 625 name = microtune_part[buf[0x13]]; 626 switch (buf[0x13]) { 627 case MT2032: 628 mt2032_init(fe); 629 break; 630 case MT2050: 631 mt2050_init(fe); 632 break; 633 default: 634 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n", 635 name); 636 return NULL; 637 } 638 639 strscpy(fe->ops.tuner_ops.info.name, name, 640 sizeof(fe->ops.tuner_ops.info.name)); 641 tuner_info("microtune %s found, OK\n",name); 642 return fe; 643 } 644 645 EXPORT_SYMBOL_GPL(microtune_attach); 646 647 MODULE_DESCRIPTION("Microtune tuner driver"); 648 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer"); 649 MODULE_LICENSE("GPL"); 650