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/videodev.h>
10 #include "tuner-i2c.h"
11 #include "mt20xx.h"
12
13 static int debug = 0;
14 module_param(debug, int, 0644);
15 MODULE_PARM_DESC(debug, "enable verbose debug messages");
16
17 #define PREFIX "mt20xx"
18
19 /* ---------------------------------------------------------------------- */
20
21 static unsigned int optimize_vco = 1;
22 module_param(optimize_vco, int, 0644);
23
24 static unsigned int tv_antenna = 1;
25 module_param(tv_antenna, int, 0644);
26
27 static unsigned int radio_antenna = 0;
28 module_param(radio_antenna, int, 0644);
29
30 /* ---------------------------------------------------------------------- */
31
32 #define MT2032 0x04
33 #define MT2030 0x06
34 #define MT2040 0x07
35 #define MT2050 0x42
36
37 static char *microtune_part[] = {
38 [ MT2030 ] = "MT2030",
39 [ MT2032 ] = "MT2032",
40 [ MT2040 ] = "MT2040",
41 [ MT2050 ] = "MT2050",
42 };
43
44 struct microtune_priv {
45 struct tuner_i2c_props i2c_props;
46
47 unsigned int xogc;
48 //unsigned int radio_if2;
49
50 u32 frequency;
51 };
52
53 static int microtune_release(struct dvb_frontend *fe)
54 {
55 kfree(fe->tuner_priv);
56 fe->tuner_priv = NULL;
57
58 return 0;
59 }
60
61 static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)
62 {
63 struct microtune_priv *priv = fe->tuner_priv;
64 *frequency = priv->frequency;
65 return 0;
66 }
67
68 // IsSpurInBand()?
69 static int mt2032_spurcheck(struct dvb_frontend *fe,
70 int f1, int f2, int spectrum_from,int spectrum_to)
71 {
72 struct microtune_priv *priv = fe->tuner_priv;
73 int n1=1,n2,f;
74
75 f1=f1/1000; //scale to kHz to avoid 32bit overflows
76 f2=f2/1000;
77 spectrum_from/=1000;
78 spectrum_to/=1000;
79
80 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n",
81 f1,f2,spectrum_from,spectrum_to);
82
83 do {
84 n2=-n1;
85 f=n1*(f1-f2);
86 do {
87 n2--;
88 f=f-f2;
89 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
90
91 if( (f>spectrum_from) && (f<spectrum_to))
92 tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
93 } while ( (f>(f2-spectrum_to)) || (n2>-5));
94 n1++;
95 } while (n1<5);
96
97 return 1;
98 }
99
100 static int mt2032_compute_freq(struct dvb_frontend *fe,
101 unsigned int rfin,
102 unsigned int if1, unsigned int if2,
103 unsigned int spectrum_from,
104 unsigned int spectrum_to,
105 unsigned char *buf,
106 int *ret_sel,
107 unsigned int xogc) //all in Hz
108 {
109 struct microtune_priv *priv = fe->tuner_priv;
110 unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
111 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
112
113 fref= 5250 *1000; //5.25MHz
114 desired_lo1=rfin+if1;
115
116 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
117 lo1n=lo1/8;
118 lo1a=lo1-(lo1n*8);
119
120 s=rfin/1000/1000+1090;
121
122 if(optimize_vco) {
123 if(s>1890) sel=0;
124 else if(s>1720) sel=1;
125 else if(s>1530) sel=2;
126 else if(s>1370) sel=3;
127 else sel=4; // >1090
128 }
129 else {
130 if(s>1790) sel=0; // <1958
131 else if(s>1617) sel=1;
132 else if(s>1449) sel=2;
133 else if(s>1291) sel=3;
134 else sel=4; // >1090
135 }
136 *ret_sel=sel;
137
138 lo1freq=(lo1a+8*lo1n)*fref;
139
140 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
141 rfin,lo1,lo1n,lo1a,sel,lo1freq);
142
143 desired_lo2=lo1freq-rfin-if2;
144 lo2=(desired_lo2)/fref;
145 lo2n=lo2/8;
146 lo2a=lo2-(lo2n*8);
147 lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
148 lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
149
150 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
151 rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
152
153 if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || 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
183 static 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
205 static 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
242 static 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
300 static 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
324 static 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
345 static 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
366 static 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
373 static 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
429 static 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
441 static 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
504 static 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
526 static 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
546 static 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
567 static 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
573 static 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
598 struct 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
615 //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
616
617 memset(buf,0,sizeof(buf));
618
619 name = "unknown";
620
621 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
622 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
623 if (debug) {
624 int i;
625 tuner_dbg("MT20xx hexdump:");
626 for(i=0;i<21;i++) {
627 printk(" %02x",buf[i]);
628 if(((i+1)%8)==0) printk(" ");
629 }
630 printk("\n");
631 }
632 company_code = buf[0x11] << 8 | buf[0x12];
633 tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
634 company_code,buf[0x13],buf[0x14]);
635
636
637 if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
638 NULL != microtune_part[buf[0x13]])
639 name = microtune_part[buf[0x13]];
640 switch (buf[0x13]) {
641 case MT2032:
642 mt2032_init(fe);
643 break;
644 case MT2050:
645 mt2050_init(fe);
646 break;
647 default:
648 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
649 name);
650 return NULL;
651 }
652
653 strlcpy(fe->ops.tuner_ops.info.name, name,
654 sizeof(fe->ops.tuner_ops.info.name));
655 tuner_info("microtune %s found, OK\n",name);
656 return fe;
657 }
658
659 EXPORT_SYMBOL_GPL(microtune_attach);
660
661 MODULE_DESCRIPTION("Microtune tuner driver");
662 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
663 MODULE_LICENSE("GPL");
664
665 /*
666 * Overrides for Emacs so that we follow Linus's tabbing style.
667 * ---------------------------------------------------------------------------
668 * Local variables:
669 * c-basic-offset: 8
670 * End:
671 */
672
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