2 * i2c tv tuner chip device driver
3 * controls microtune tuners, mt2032 + mt2050 at the moment.
5 * This "mt20xx" module was split apart from the original "tuner" module.
7 #include <linux/delay.h>
9 #include <linux/slab.h>
10 #include <linux/videodev2.h>
11 #include "tuner-i2c.h"
15 module_param(debug, int, 0644);
16 MODULE_PARM_DESC(debug, "enable verbose debug messages");
18 /* ---------------------------------------------------------------------- */
20 static unsigned int optimize_vco = 1;
21 module_param(optimize_vco, int, 0644);
23 static unsigned int tv_antenna = 1;
24 module_param(tv_antenna, int, 0644);
26 static unsigned int radio_antenna;
27 module_param(radio_antenna, int, 0644);
29 /* ---------------------------------------------------------------------- */
36 static char *microtune_part[] = {
37 [ MT2030 ] = "MT2030",
38 [ MT2032 ] = "MT2032",
39 [ MT2040 ] = "MT2040",
40 [ MT2050 ] = "MT2050",
43 struct microtune_priv {
44 struct tuner_i2c_props i2c_props;
47 //unsigned int radio_if2;
52 static void microtune_release(struct dvb_frontend *fe)
54 kfree(fe->tuner_priv);
55 fe->tuner_priv = NULL;
58 static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency)
60 struct microtune_priv *priv = fe->tuner_priv;
61 *frequency = priv->frequency;
66 static int mt2032_spurcheck(struct dvb_frontend *fe,
67 int f1, int f2, int spectrum_from,int spectrum_to)
69 struct microtune_priv *priv = fe->tuner_priv;
72 f1=f1/1000; //scale to kHz to avoid 32bit overflows
77 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n",
78 f1,f2,spectrum_from,spectrum_to);
86 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
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));
97 static int mt2032_compute_freq(struct dvb_frontend *fe,
99 unsigned int if1, unsigned int if2,
100 unsigned int spectrum_from,
101 unsigned int spectrum_to,
104 unsigned int xogc) //all in Hz
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;
110 fref= 5250 *1000; //5.25MHz
111 desired_lo1=rfin+if1;
113 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
117 s=rfin/1000/1000+1090;
121 else if(s>1720) sel=1;
122 else if(s>1530) sel=2;
123 else if(s>1370) sel=3;
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;
135 lo1freq=(lo1a+8*lo1n)*fref;
137 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
138 rfin,lo1,lo1n,lo1a,sel,lo1freq);
140 desired_lo2=lo1freq-rfin-if2;
141 lo2=(desired_lo2)/fref;
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;
147 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
148 rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
150 if (lo1a > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 ||
152 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
153 lo1a, lo1n, lo2a,lo2n);
157 mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to);
158 // should recalculate lo1 (one step up/down)
160 // set up MT2032 register map for transfer over i2c
162 buf[1]=lo1a | (sel<<4);
164 buf[3]=0x0f; //reserved
166 buf[5]=(lo2n-1) | (lo2a<<5);
167 if(rfin >400*1000*1000)
170 buf[6]=0xf4; // set PKEN per rev 1.2
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
181 static int mt2032_check_lo_lock(struct dvb_frontend *fe)
183 struct microtune_priv *priv = fe->tuner_priv;
185 unsigned char buf[2];
187 for(try=0;try<10;try++) {
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]);
197 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
203 static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock)
205 struct microtune_priv *priv = fe->tuner_priv;
206 unsigned char buf[2];
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]);
215 if(tad1 ==0) return lock;
216 if(tad1 ==1) return lock;
230 tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
234 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
235 lock=mt2032_check_lo_lock(fe);
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)
244 unsigned char buf[21];
245 int lint_try,ret,sel,lock=0;
246 struct microtune_priv *priv = fe->tuner_priv;
248 tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
249 rfin,if1,if2,from,to);
252 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
253 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
256 ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
260 // send only the relevant registers per Rev. 1.2
262 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4);
264 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4);
266 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3);
268 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
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);
275 lock=mt2032_optimize_vco(fe,sel,lock);
278 tuner_dbg("mt2032: re-init PLLs by LINT\n");
280 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
281 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
284 tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
288 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
291 buf[1]=0x20; // LOGC for optimal phase noise
292 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
294 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
298 static int mt2032_set_tv_freq(struct dvb_frontend *fe,
299 struct analog_parameters *params)
303 // signal bandwidth and picture carrier
304 if (params->std & V4L2_STD_525_60) {
316 mt2032_set_if_freq(fe, params->frequency*62500,
317 1090*1000*1000, if2, from, to);
322 static int mt2032_set_radio_freq(struct dvb_frontend *fe,
323 struct analog_parameters *params)
325 struct microtune_priv *priv = fe->tuner_priv;
328 if (params->std & V4L2_STD_525_60) {
329 tuner_dbg("pinnacle ntsc\n");
332 tuner_dbg("pinnacle pal\n");
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);
343 static int mt2032_set_params(struct dvb_frontend *fe,
344 struct analog_parameters *params)
346 struct microtune_priv *priv = fe->tuner_priv;
349 switch (params->mode) {
350 case V4L2_TUNER_RADIO:
351 ret = mt2032_set_radio_freq(fe, params);
352 priv->frequency = params->frequency * 125 / 2;
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;
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,
370 // Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
371 static int mt2032_init(struct dvb_frontend *fe)
373 struct microtune_priv *priv = fe->tuner_priv;
374 unsigned char buf[21];
377 // Initialize Registers per spec.
378 buf[1]=2; // Index to register 2
382 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4);
384 buf[5]=6; // Index register 6
390 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6);
392 buf[12]=13; // Index register 13
394 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2);
396 // Adjust XOGC (register 7), wait for XOK
399 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
402 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
403 tuner_i2c_xfer_recv(&priv->i2c_props,buf,1);
405 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
409 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
411 xogc=4; // min. 4 per spec
416 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2);
418 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
422 memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops));
427 static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna)
429 struct microtune_priv *priv = fe->tuner_priv;
430 unsigned char buf[2];
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);
438 static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2)
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;
444 unsigned char buf[6];
446 tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
450 f_lo1=(f_lo1/1000000)*1000000;
452 f_lo2=f_lo1-freq-if2;
453 f_lo2=(f_lo2/50000)*50000;
458 f_lo1_modulo= f_lo1-(lo1*4000000);
459 f_lo2_modulo= f_lo2-(lo2*4000000);
461 num1=4*f_lo1_modulo/4000000;
462 num2=4096*(f_lo2_modulo/1000)/4000;
467 div1b=lo1-(div1a+1)*12;
470 div2b=lo2-(div2a+1)*8;
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);
479 buf[1]= 4*div1b + num1;
480 if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
483 buf[3]=32*div2b + num2/256;
484 buf[4]=num2-(num2/256)*256;
486 if(num2!=0) buf[5]=buf[5]|0x40;
489 tuner_dbg("bufs is: %*ph\n", 6, buf);
491 ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6);
493 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
496 static int mt2050_set_tv_freq(struct dvb_frontend *fe,
497 struct analog_parameters *params)
501 if (params->std & V4L2_STD_525_60) {
508 if (V4L2_TUNER_DIGITAL_TV == params->mode) {
509 // DVB (pinnacle 300i)
512 mt2050_set_if_freq(fe, params->frequency*62500, if2);
513 mt2050_set_antenna(fe, tv_antenna);
518 static int mt2050_set_radio_freq(struct dvb_frontend *fe,
519 struct analog_parameters *params)
521 struct microtune_priv *priv = fe->tuner_priv;
524 if (params->std & V4L2_STD_525_60) {
525 tuner_dbg("pinnacle ntsc\n");
528 tuner_dbg("pinnacle pal\n");
532 mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2);
533 mt2050_set_antenna(fe, radio_antenna);
538 static int mt2050_set_params(struct dvb_frontend *fe,
539 struct analog_parameters *params)
541 struct microtune_priv *priv = fe->tuner_priv;
544 switch (params->mode) {
545 case V4L2_TUNER_RADIO:
546 ret = mt2050_set_radio_freq(fe, params);
547 priv->frequency = params->frequency * 125 / 2;
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;
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,
565 static int mt2050_init(struct dvb_frontend *fe)
567 struct microtune_priv *priv = fe->tuner_priv;
568 unsigned char buf[2];
572 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */
576 tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */
579 tuner_i2c_xfer_send(&priv->i2c_props, buf, 1);
580 tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1);
582 tuner_dbg("mt2050: sro is %x\n", buf[0]);
584 memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops));
589 struct dvb_frontend *microtune_attach(struct dvb_frontend *fe,
590 struct i2c_adapter* i2c_adap,
593 struct microtune_priv *priv = NULL;
595 unsigned char buf[21];
598 priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
601 fe->tuner_priv = priv;
603 priv->i2c_props.addr = i2c_addr;
604 priv->i2c_props.adap = i2c_adap;
605 priv->i2c_props.name = "mt20xx";
607 //priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
609 memset(buf,0,sizeof(buf));
613 tuner_i2c_xfer_send(&priv->i2c_props,buf,1);
614 tuner_i2c_xfer_recv(&priv->i2c_props,buf,21);
616 tuner_dbg("MT20xx hexdump: %*ph\n", 21, buf);
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]);
623 if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
624 NULL != microtune_part[buf[0x13]])
625 name = microtune_part[buf[0x13]];
634 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
639 strlcpy(fe->ops.tuner_ops.info.name, name,
640 sizeof(fe->ops.tuner_ops.info.name));
641 tuner_info("microtune %s found, OK\n",name);
645 EXPORT_SYMBOL_GPL(microtune_attach);
647 MODULE_DESCRIPTION("Microtune tuner driver");
648 MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
649 MODULE_LICENSE("GPL");