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mt20xx.c
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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 
45 
46  unsigned int xogc;
47  //unsigned int radio_if2;
48 
50 };
51 
52 static int microtune_release(struct dvb_frontend *fe)
53 {
54  kfree(fe->tuner_priv);
55  fe->tuner_priv = NULL;
56 
57  return 0;
58 }
59 
60 static 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()?
68 static 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 
99 static 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 
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;
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 
434  buf[0] = 6;
435  buf[1] = antenna ? 0x11 : 0x10;
436  tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
437  tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
438 }
439 
440 static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)
441 {
442  struct microtune_priv *priv = fe->tuner_priv;
443  unsigned int if1=1218*1000*1000;
444  unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
445  int ret;
446  unsigned char buf[6];
447 
448  tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
449  freq,if1,if2);
450 
451  f_lo1=freq+if1;
452  f_lo1=(f_lo1/1000000)*1000000;
453 
454  f_lo2=f_lo1-freq-if2;
455  f_lo2=(f_lo2/50000)*50000;
456 
457  lo1=f_lo1/4000000;
458  lo2=f_lo2/4000000;
459 
460  f_lo1_modulo= f_lo1-(lo1*4000000);
461  f_lo2_modulo= f_lo2-(lo2*4000000);
462 
463  num1=4*f_lo1_modulo/4000000;
464  num2=4096*(f_lo2_modulo/1000)/4000;
465 
466  // todo spurchecks
467 
468  div1a=(lo1/12)-1;
469  div1b=lo1-(div1a+1)*12;
470 
471  div2a=(lo2/8)-1;
472  div2b=lo2-(div2a+1)*8;
473 
474  if (debug > 1) {
475  tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
476  tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
477  num1,num2,div1a,div1b,div2a,div2b);
478  }
479 
480  buf[0]=1;
481  buf[1]= 4*div1b + num1;
482  if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
483 
484  buf[2]=div1a;
485  buf[3]=32*div2b + num2/256;
486  buf[4]=num2-(num2/256)*256;
487  buf[5]=div2a;
488  if(num2!=0) buf[5]=buf[5]|0x40;
489 
490  if (debug > 1) {
491  int i;
492  tuner_dbg("bufs is: ");
493  for(i=0;i<6;i++)
494  printk("%x ",buf[i]);
495  printk("\n");
496  }
497 
498  ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6);
499  if (ret!=6)
500  tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
501 }
502 
503 static int mt2050_set_tv_freq(struct dvb_frontend *fe,
504  struct analog_parameters *params)
505 {
506  unsigned int if2;
507 
508  if (params->std & V4L2_STD_525_60) {
509  // NTSC
510  if2 = 45750*1000;
511  } else {
512  // PAL
513  if2 = 38900*1000;
514  }
515  if (V4L2_TUNER_DIGITAL_TV == params->mode) {
516  // DVB (pinnacle 300i)
517  if2 = 36150*1000;
518  }
519  mt2050_set_if_freq(fe, params->frequency*62500, if2);
520  mt2050_set_antenna(fe, tv_antenna);
521 
522  return 0;
523 }
524 
525 static int mt2050_set_radio_freq(struct dvb_frontend *fe,
526  struct analog_parameters *params)
527 {
528  struct microtune_priv *priv = fe->tuner_priv;
529  int if2;
530 
531  if (params->std & V4L2_STD_525_60) {
532  tuner_dbg("pinnacle ntsc\n");
533  if2 = 41300 * 1000;
534  } else {
535  tuner_dbg("pinnacle pal\n");
536  if2 = 33300 * 1000;
537  }
538 
539  mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2);
540  mt2050_set_antenna(fe, radio_antenna);
541 
542  return 0;
543 }
544 
545 static int mt2050_set_params(struct dvb_frontend *fe,
546  struct analog_parameters *params)
547 {
548  struct microtune_priv *priv = fe->tuner_priv;
549  int ret = -EINVAL;
550 
551  switch (params->mode) {
552  case V4L2_TUNER_RADIO:
553  ret = mt2050_set_radio_freq(fe, params);
554  priv->frequency = params->frequency * 125 / 2;
555  break;
558  ret = mt2050_set_tv_freq(fe, params);
559  priv->frequency = params->frequency * 62500;
560  break;
561  }
562 
563  return ret;
564 }
565 
566 static struct dvb_tuner_ops mt2050_tuner_ops = {
567  .set_analog_params = mt2050_set_params,
568  .release = microtune_release,
569  .get_frequency = microtune_get_frequency,
570 };
571 
572 static int mt2050_init(struct dvb_frontend *fe)
573 {
574  struct microtune_priv *priv = fe->tuner_priv;
575  unsigned char buf[2];
576 
577  buf[0] = 6;
578  buf[1] = 0x10;
579  tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */
580 
581  buf[0] = 0x0f;
582  buf[1] = 0x0f;
583  tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */
584 
585  buf[0] = 0x0d;
586  tuner_i2c_xfer_send(&priv->i2c_props, buf, 1);
587  tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1);
588 
589  tuner_dbg("mt2050: sro is %x\n", buf[0]);
590 
591  memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops));
592 
593  return 0;
594 }
595 
597  struct i2c_adapter* i2c_adap,
598  u8 i2c_addr)
599 {
600  struct microtune_priv *priv = NULL;
601  char *name;
602  unsigned char buf[21];
603  int company_code;
604 
605  priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
606  if (priv == NULL)
607  return NULL;
608  fe->tuner_priv = priv;
609 
610  priv->i2c_props.addr = i2c_addr;
611  priv->i2c_props.adap = i2c_adap;
612  priv->i2c_props.name = "mt20xx";
613 
614  //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
615 
616  memset(buf,0,sizeof(buf));
617 
618  name = "unknown";
619 
620  tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
621  tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
622  if (debug) {
623  int i;
624  tuner_dbg("MT20xx hexdump:");
625  for(i=0;i<21;i++) {
626  printk(" %02x",buf[i]);
627  if(((i+1)%8)==0) printk(" ");
628  }
629  printk("\n");
630  }
631  company_code = buf[0x11] << 8 | buf[0x12];
632  tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
633  company_code,buf[0x13],buf[0x14]);
634 
635 
636  if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
637  NULL != microtune_part[buf[0x13]])
638  name = microtune_part[buf[0x13]];
639  switch (buf[0x13]) {
640  case MT2032:
641  mt2032_init(fe);
642  break;
643  case MT2050:
644  mt2050_init(fe);
645  break;
646  default:
647  tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
648  name);
649  return NULL;
650  }
651 
652  strlcpy(fe->ops.tuner_ops.info.name, name,
653  sizeof(fe->ops.tuner_ops.info.name));
654  tuner_info("microtune %s found, OK\n",name);
655  return fe;
656 }
657 
659 
660 MODULE_DESCRIPTION("Microtune tuner driver");
661 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
662 MODULE_LICENSE("GPL");
663 
664 /*
665  * Overrides for Emacs so that we follow Linus's tabbing style.
666  * ---------------------------------------------------------------------------
667  * Local variables:
668  * c-basic-offset: 8
669  * End:
670  */