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 14static int debug; 15module_param(debug, int, 0644); 16MODULE_PARM_DESC(debug, "enable verbose debug messages"); 17 18/* ---------------------------------------------------------------------- */ 19 20static unsigned int optimize_vco = 1; 21module_param(optimize_vco, int, 0644); 22 23static unsigned int tv_antenna = 1; 24module_param(tv_antenna, int, 0644); 25 26static unsigned int radio_antenna; 27module_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 36static char *microtune_part[] = { 37 [ MT2030 ] = "MT2030", 38 [ MT2032 ] = "MT2032", 39 [ MT2040 ] = "MT2040", 40 [ MT2050 ] = "MT2050", 41}; 42 43struct 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 52static int microtune_release(struct dvb_frontend *fe) 53{ 54 kfree(fe->tuner_priv); 55 fe->tuner_priv = NULL; 56 57 return 0; 58} 59 60static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency) 61{ 62 struct microtune_priv *priv = fe->tuner_priv; 63 *frequency = priv->frequency; 64 return 0; 65} 66 67// IsSpurInBand()? 68static int mt2032_spurcheck(struct dvb_frontend *fe, 69 int f1, int f2, int spectrum_from,int spectrum_to) 70{ 71 struct microtune_priv *priv = fe->tuner_priv; 72 int n1=1,n2,f; 73 74 f1=f1/1000; //scale to kHz to avoid 32bit overflows 75 f2=f2/1000; 76 spectrum_from/=1000; 77 spectrum_to/=1000; 78 79 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n", 80 f1,f2,spectrum_from,spectrum_to); 81 82 do { 83 n2=-n1; 84 f=n1*(f1-f2); 85 do { 86 n2--; 87 f=f-f2; 88 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f); 89 90 if( (f>spectrum_from) && (f<spectrum_to)) 91 tuner_dbg("mt2032 spurcheck triggered: %d\n",n1); 92 } while ( (f>(f2-spectrum_to)) || (n2>-5)); 93 n1++; 94 } while (n1<5); 95 96 return 1; 97} 98 99static int mt2032_compute_freq(struct dvb_frontend *fe, 100 unsigned int rfin, 101 unsigned int if1, unsigned int if2, 102 unsigned int spectrum_from, 103 unsigned int spectrum_to, 104 unsigned char *buf, 105 int *ret_sel, 106 unsigned int xogc) //all in Hz 107{ 108 struct microtune_priv *priv = fe->tuner_priv; 109 unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1, 110 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq; 111 112 fref= 5250 *1000; //5.25MHz 113 desired_lo1=rfin+if1; 114 115 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000); 116 lo1n=lo1/8; 117 lo1a=lo1-(lo1n*8); 118 119 s=rfin/1000/1000+1090; 120 121 if(optimize_vco) { 122 if(s>1890) sel=0; 123 else if(s>1720) sel=1; 124 else if(s>1530) sel=2; 125 else if(s>1370) sel=3; 126 else sel=4; // >1090 127 } 128 else { 129 if(s>1790) sel=0; // <1958 130 else if(s>1617) sel=1; 131 else if(s>1449) sel=2; 132 else if(s>1291) sel=3; 133 else sel=4; // >1090 134 } 135 *ret_sel=sel; 136 137 lo1freq=(lo1a+8*lo1n)*fref; 138 139 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n", 140 rfin,lo1,lo1n,lo1a,sel,lo1freq); 141 142 desired_lo2=lo1freq-rfin-if2; 143 lo2=(desired_lo2)/fref; 144 lo2n=lo2/8; 145 lo2a=lo2-(lo2n*8); 146 lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith 147 lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000; 148 149 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n", 150 rfin,lo2,lo2n,lo2a,lo2num,lo2freq); 151 152 if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 || 153 lo2n > 30) { 154 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n", 155 lo1a, lo1n, lo2a,lo2n); 156 return(-1); 157 } 158 159 mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to); 160 // should recalculate lo1 (one step up/down) 161 162 // set up MT2032 register map for transfer over i2c 163 buf[0]=lo1n-1; 164 buf[1]=lo1a | (sel<<4); 165 buf[2]=0x86; // LOGC 166 buf[3]=0x0f; //reserved 167 buf[4]=0x1f; 168 buf[5]=(lo2n-1) | (lo2a<<5); 169 if(rfin >400*1000*1000) 170 buf[6]=0xe4; 171 else 172 buf[6]=0xf4; // set PKEN per rev 1.2 173 buf[7]=8+xogc; 174 buf[8]=0xc3; //reserved 175 buf[9]=0x4e; //reserved 176 buf[10]=0xec; //reserved 177 buf[11]=(lo2num&0xff); 178 buf[12]=(lo2num>>8) |0x80; // Lo2RST 179 180 return 0; 181} 182 183static int mt2032_check_lo_lock(struct dvb_frontend *fe) 184{ 185 struct microtune_priv *priv = fe->tuner_priv; 186 int try,lock=0; 187 unsigned char buf[2]; 188 189 for(try=0;try<10;try++) { 190 buf[0]=0x0e; 191 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 192 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 193 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]); 194 lock=buf[0] &0x06; 195 196 if (lock==6) 197 break; 198 199 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]); 200 udelay(1000); 201 } 202 return lock; 203} 204 205static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock) 206{ 207 struct microtune_priv *priv = fe->tuner_priv; 208 unsigned char buf[2]; 209 int tad1; 210 211 buf[0]=0x0f; 212 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 213 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 214 tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]); 215 tad1=buf[0]&0x07; 216 217 if(tad1 ==0) return lock; 218 if(tad1 ==1) return lock; 219 220 if(tad1==2) { 221 if(sel==0) 222 return lock; 223 else sel--; 224 } 225 else { 226 if(sel<4) 227 sel++; 228 else 229 return lock; 230 } 231 232 tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel); 233 234 buf[0]=0x0f; 235 buf[1]=sel; 236 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 237 lock=mt2032_check_lo_lock(fe); 238 return lock; 239} 240 241 242static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin, 243 unsigned int if1, unsigned int if2, 244 unsigned int from, unsigned int to) 245{ 246 unsigned char buf[21]; 247 int lint_try,ret,sel,lock=0; 248 struct microtune_priv *priv = fe->tuner_priv; 249 250 tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n", 251 rfin,if1,if2,from,to); 252 253 buf[0]=0; 254 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 255 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); 256 257 buf[0]=0; 258 ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc); 259 if (ret<0) 260 return; 261 262 // send only the relevant registers per Rev. 1.2 263 buf[0]=0; 264 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4); 265 buf[5]=5; 266 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4); 267 buf[11]=11; 268 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3); 269 if(ret!=3) 270 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret); 271 272 // wait for PLLs to lock (per manual), retry LINT if not. 273 for(lint_try=0; lint_try<2; lint_try++) { 274 lock=mt2032_check_lo_lock(fe); 275 276 if(optimize_vco) 277 lock=mt2032_optimize_vco(fe,sel,lock); 278 if(lock==6) break; 279 280 tuner_dbg("mt2032: re-init PLLs by LINT\n"); 281 buf[0]=7; 282 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs 283 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 284 mdelay(10); 285 buf[1]=8+priv->xogc; 286 tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 287 } 288 289 if (lock!=6) 290 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n"); 291 292 buf[0]=2; 293 buf[1]=0x20; // LOGC for optimal phase noise 294 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 295 if (ret!=2) 296 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); 297} 298 299 300static int mt2032_set_tv_freq(struct dvb_frontend *fe, 301 struct analog_parameters *params) 302{ 303 int if2,from,to; 304 305 // signal bandwidth and picture carrier 306 if (params->std & V4L2_STD_525_60) { 307 // NTSC 308 from = 40750*1000; 309 to = 46750*1000; 310 if2 = 45750*1000; 311 } else { 312 // PAL 313 from = 32900*1000; 314 to = 39900*1000; 315 if2 = 38900*1000; 316 } 317 318 mt2032_set_if_freq(fe, params->frequency*62500, 319 1090*1000*1000, if2, from, to); 320 321 return 0; 322} 323 324static int mt2032_set_radio_freq(struct dvb_frontend *fe, 325 struct analog_parameters *params) 326{ 327 struct microtune_priv *priv = fe->tuner_priv; 328 int if2; 329 330 if (params->std & V4L2_STD_525_60) { 331 tuner_dbg("pinnacle ntsc\n"); 332 if2 = 41300 * 1000; 333 } else { 334 tuner_dbg("pinnacle pal\n"); 335 if2 = 33300 * 1000; 336 } 337 338 // per Manual for FM tuning: first if center freq. 1085 MHz 339 mt2032_set_if_freq(fe, params->frequency * 125 / 2, 340 1085*1000*1000,if2,if2,if2); 341 342 return 0; 343} 344 345static int mt2032_set_params(struct dvb_frontend *fe, 346 struct analog_parameters *params) 347{ 348 struct microtune_priv *priv = fe->tuner_priv; 349 int ret = -EINVAL; 350 351 switch (params->mode) { 352 case V4L2_TUNER_RADIO: 353 ret = mt2032_set_radio_freq(fe, params); 354 priv->frequency = params->frequency * 125 / 2; 355 break; 356 case V4L2_TUNER_ANALOG_TV: 357 case V4L2_TUNER_DIGITAL_TV: 358 ret = mt2032_set_tv_freq(fe, params); 359 priv->frequency = params->frequency * 62500; 360 break; 361 } 362 363 return ret; 364} 365 366static struct dvb_tuner_ops mt2032_tuner_ops = { 367 .set_analog_params = mt2032_set_params, 368 .release = microtune_release, 369 .get_frequency = microtune_get_frequency, 370}; 371 372// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001 373static int mt2032_init(struct dvb_frontend *fe) 374{ 375 struct microtune_priv *priv = fe->tuner_priv; 376 unsigned char buf[21]; 377 int ret,xogc,xok=0; 378 379 // Initialize Registers per spec. 380 buf[1]=2; // Index to register 2 381 buf[2]=0xff; 382 buf[3]=0x0f; 383 buf[4]=0x1f; 384 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4); 385 386 buf[5]=6; // Index register 6 387 buf[6]=0xe4; 388 buf[7]=0x8f; 389 buf[8]=0xc3; 390 buf[9]=0x4e; 391 buf[10]=0xec; 392 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6); 393 394 buf[12]=13; // Index register 13 395 buf[13]=0x32; 396 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2); 397 398 // Adjust XOGC (register 7), wait for XOK 399 xogc=7; 400 do { 401 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); 402 mdelay(10); 403 buf[0]=0x0e; 404 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 405 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 406 xok=buf[0]&0x01; 407 tuner_dbg("mt2032: xok = 0x%02x\n",xok); 408 if (xok == 1) break; 409 410 xogc--; 411 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); 412 if (xogc == 3) { 413 xogc=4; // min. 4 per spec 414 break; 415 } 416 buf[0]=0x07; 417 buf[1]=0x88 + xogc; 418 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 419 if (ret!=2) 420 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); 421 } while (xok != 1 ); 422 priv->xogc=xogc; 423 424 memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops)); 425 426 return(1); 427} 428 429static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna) 430{ 431 struct microtune_priv *priv = fe->tuner_priv; 432 unsigned char buf[2]; 433 int ret; 434 435 buf[0] = 6; 436 buf[1] = antenna ? 0x11 : 0x10; 437 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); 438 tuner_dbg("mt2050: enabled antenna connector %d\n", antenna); 439} 440 441static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2) 442{ 443 struct microtune_priv *priv = fe->tuner_priv; 444 unsigned int if1=1218*1000*1000; 445 unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b; 446 int ret; 447 unsigned char buf[6]; 448 449 tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n", 450 freq,if1,if2); 451 452 f_lo1=freq+if1; 453 f_lo1=(f_lo1/1000000)*1000000; 454 455 f_lo2=f_lo1-freq-if2; 456 f_lo2=(f_lo2/50000)*50000; 457 458 lo1=f_lo1/4000000; 459 lo2=f_lo2/4000000; 460 461 f_lo1_modulo= f_lo1-(lo1*4000000); 462 f_lo2_modulo= f_lo2-(lo2*4000000); 463 464 num1=4*f_lo1_modulo/4000000; 465 num2=4096*(f_lo2_modulo/1000)/4000; 466 467 // todo spurchecks 468 469 div1a=(lo1/12)-1; 470 div1b=lo1-(div1a+1)*12; 471 472 div2a=(lo2/8)-1; 473 div2b=lo2-(div2a+1)*8; 474 475 if (debug > 1) { 476 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2); 477 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n", 478 num1,num2,div1a,div1b,div2a,div2b); 479 } 480 481 buf[0]=1; 482 buf[1]= 4*div1b + num1; 483 if(freq<275*1000*1000) buf[1] = buf[1]|0x80; 484 485 buf[2]=div1a; 486 buf[3]=32*div2b + num2/256; 487 buf[4]=num2-(num2/256)*256; 488 buf[5]=div2a; 489 if(num2!=0) buf[5]=buf[5]|0x40; 490 491 if (debug > 1) { 492 int i; 493 tuner_dbg("bufs is: "); 494 for(i=0;i<6;i++) 495 printk("%x ",buf[i]); 496 printk("\n"); 497 } 498 499 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6); 500 if (ret!=6) 501 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret); 502} 503 504static int mt2050_set_tv_freq(struct dvb_frontend *fe, 505 struct analog_parameters *params) 506{ 507 unsigned int if2; 508 509 if (params->std & V4L2_STD_525_60) { 510 // NTSC 511 if2 = 45750*1000; 512 } else { 513 // PAL 514 if2 = 38900*1000; 515 } 516 if (V4L2_TUNER_DIGITAL_TV == params->mode) { 517 // DVB (pinnacle 300i) 518 if2 = 36150*1000; 519 } 520 mt2050_set_if_freq(fe, params->frequency*62500, if2); 521 mt2050_set_antenna(fe, tv_antenna); 522 523 return 0; 524} 525 526static int mt2050_set_radio_freq(struct dvb_frontend *fe, 527 struct analog_parameters *params) 528{ 529 struct microtune_priv *priv = fe->tuner_priv; 530 int if2; 531 532 if (params->std & V4L2_STD_525_60) { 533 tuner_dbg("pinnacle ntsc\n"); 534 if2 = 41300 * 1000; 535 } else { 536 tuner_dbg("pinnacle pal\n"); 537 if2 = 33300 * 1000; 538 } 539 540 mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2); 541 mt2050_set_antenna(fe, radio_antenna); 542 543 return 0; 544} 545 546static int mt2050_set_params(struct dvb_frontend *fe, 547 struct analog_parameters *params) 548{ 549 struct microtune_priv *priv = fe->tuner_priv; 550 int ret = -EINVAL; 551 552 switch (params->mode) { 553 case V4L2_TUNER_RADIO: 554 ret = mt2050_set_radio_freq(fe, params); 555 priv->frequency = params->frequency * 125 / 2; 556 break; 557 case V4L2_TUNER_ANALOG_TV: 558 case V4L2_TUNER_DIGITAL_TV: 559 ret = mt2050_set_tv_freq(fe, params); 560 priv->frequency = params->frequency * 62500; 561 break; 562 } 563 564 return ret; 565} 566 567static struct dvb_tuner_ops mt2050_tuner_ops = { 568 .set_analog_params = mt2050_set_params, 569 .release = microtune_release, 570 .get_frequency = microtune_get_frequency, 571}; 572 573static int mt2050_init(struct dvb_frontend *fe) 574{ 575 struct microtune_priv *priv = fe->tuner_priv; 576 unsigned char buf[2]; 577 int ret; 578 579 buf[0]=6; 580 buf[1]=0x10; 581 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // power 582 583 buf[0]=0x0f; 584 buf[1]=0x0f; 585 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // m1lo 586 587 buf[0]=0x0d; 588 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 589 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); 590 591 tuner_dbg("mt2050: sro is %x\n",buf[0]); 592 593 memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops)); 594 595 return 0; 596} 597 598struct dvb_frontend *microtune_attach(struct dvb_frontend *fe, 599 struct i2c_adapter* i2c_adap, 600 u8 i2c_addr) 601{ 602 struct microtune_priv *priv = NULL; 603 char *name; 604 unsigned char buf[21]; 605 int company_code; 606 607 priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL); 608 if (priv == NULL) 609 return NULL; 610 fe->tuner_priv = priv; 611 612 priv->i2c_props.addr = i2c_addr; 613 priv->i2c_props.adap = i2c_adap; 614 priv->i2c_props.name = "mt20xx"; 615 616 //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */ 617 618 memset(buf,0,sizeof(buf)); 619 620 name = "unknown"; 621 622 tuner_i2c_xfer_send(&priv->i2c_props,buf,1); 623 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); 624 if (debug) { 625 int i; 626 tuner_dbg("MT20xx hexdump:"); 627 for(i=0;i<21;i++) { 628 printk(" %02x",buf[i]); 629 if(((i+1)%8)==0) printk(" "); 630 } 631 printk("\n"); 632 } 633 company_code = buf[0x11] << 8 | buf[0x12]; 634 tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n", 635 company_code,buf[0x13],buf[0x14]); 636 637 638 if (buf[0x13] < ARRAY_SIZE(microtune_part) && 639 NULL != microtune_part[buf[0x13]]) 640 name = microtune_part[buf[0x13]]; 641 switch (buf[0x13]) { 642 case MT2032: 643 mt2032_init(fe); 644 break; 645 case MT2050: 646 mt2050_init(fe); 647 break; 648 default: 649 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n", 650 name); 651 return NULL; 652 } 653 654 strlcpy(fe->ops.tuner_ops.info.name, name, 655 sizeof(fe->ops.tuner_ops.info.name)); 656 tuner_info("microtune %s found, OK\n",name); 657 return fe; 658} 659 660EXPORT_SYMBOL_GPL(microtune_attach); 661 662MODULE_DESCRIPTION("Microtune tuner driver"); 663MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer"); 664MODULE_LICENSE("GPL"); 665 666/* 667 * Overrides for Emacs so that we follow Linus's tabbing style. 668 * --------------------------------------------------------------------------- 669 * Local variables: 670 * c-basic-offset: 8 671 * End: 672 */ 673