3 * i2c tv tuner chip device driver
4 * controls microtune tuners, mt2032 + mt2050 at the moment.
6 #include <linux/delay.h>
8 #include <linux/videodev.h>
9 #include "tuner-driver.h"
11 /* ---------------------------------------------------------------------- */
13 static unsigned int optimize_vco = 1;
14 module_param(optimize_vco, int, 0644);
16 static unsigned int tv_antenna = 1;
17 module_param(tv_antenna, int, 0644);
19 static unsigned int radio_antenna = 0;
20 module_param(radio_antenna, int, 0644);
22 /* from tuner-core.c */
23 extern int tuner_debug;
25 /* ---------------------------------------------------------------------- */
32 static char *microtune_part[] = {
33 [ MT2030 ] = "MT2030",
34 [ MT2032 ] = "MT2032",
35 [ MT2040 ] = "MT2040",
36 [ MT2050 ] = "MT2050",
39 struct microtune_priv {
41 unsigned int radio_if2;
44 static void microtune_release(struct i2c_client *c)
46 struct tuner *t = i2c_get_clientdata(c);
53 static int mt2032_spurcheck(struct i2c_client *c,
54 int f1, int f2, int spectrum_from,int spectrum_to)
56 struct tuner *t = i2c_get_clientdata(c);
59 f1=f1/1000; //scale to kHz to avoid 32bit overflows
64 tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n",
65 f1,f2,spectrum_from,spectrum_to);
73 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
75 if( (f>spectrum_from) && (f<spectrum_to))
76 tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
77 } while ( (f>(f2-spectrum_to)) || (n2>-5));
84 static int mt2032_compute_freq(struct i2c_client *c,
86 unsigned int if1, unsigned int if2,
87 unsigned int spectrum_from,
88 unsigned int spectrum_to,
91 unsigned int xogc) //all in Hz
93 struct tuner *t = i2c_get_clientdata(c);
94 unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
95 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
97 fref= 5250 *1000; //5.25MHz
100 lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
104 s=rfin/1000/1000+1090;
108 else if(s>1720) sel=1;
109 else if(s>1530) sel=2;
110 else if(s>1370) sel=3;
114 if(s>1790) sel=0; // <1958
115 else if(s>1617) sel=1;
116 else if(s>1449) sel=2;
117 else if(s>1291) sel=3;
122 lo1freq=(lo1a+8*lo1n)*fref;
124 tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
125 rfin,lo1,lo1n,lo1a,sel,lo1freq);
127 desired_lo2=lo1freq-rfin-if2;
128 lo2=(desired_lo2)/fref;
131 lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
132 lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
134 tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
135 rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
137 if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
138 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
139 lo1a, lo1n, lo2a,lo2n);
143 mt2032_spurcheck(c, lo1freq, desired_lo2, spectrum_from, spectrum_to);
144 // should recalculate lo1 (one step up/down)
146 // set up MT2032 register map for transfer over i2c
148 buf[1]=lo1a | (sel<<4);
150 buf[3]=0x0f; //reserved
152 buf[5]=(lo2n-1) | (lo2a<<5);
153 if(rfin >400*1000*1000)
156 buf[6]=0xf4; // set PKEN per rev 1.2
158 buf[8]=0xc3; //reserved
159 buf[9]=0x4e; //reserved
160 buf[10]=0xec; //reserved
161 buf[11]=(lo2num&0xff);
162 buf[12]=(lo2num>>8) |0x80; // Lo2RST
167 static int mt2032_check_lo_lock(struct i2c_client *c)
169 struct tuner *t = i2c_get_clientdata(c);
171 unsigned char buf[2];
173 for(try=0;try<10;try++) {
175 i2c_master_send(c,buf,1);
176 i2c_master_recv(c,buf,1);
177 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
183 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
189 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
191 struct tuner *t = i2c_get_clientdata(c);
192 unsigned char buf[2];
196 i2c_master_send(c,buf,1);
197 i2c_master_recv(c,buf,1);
198 tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
201 if(tad1 ==0) return lock;
202 if(tad1 ==1) return lock;
216 tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
220 i2c_master_send(c,buf,2);
221 lock=mt2032_check_lo_lock(c);
226 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
227 unsigned int if1, unsigned int if2,
228 unsigned int from, unsigned int to)
230 unsigned char buf[21];
231 int lint_try,ret,sel,lock=0;
232 struct tuner *t = i2c_get_clientdata(c);
233 struct microtune_priv *priv = t->priv;
235 tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
236 rfin,if1,if2,from,to);
239 ret=i2c_master_send(c,buf,1);
240 i2c_master_recv(c,buf,21);
243 ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc);
247 // send only the relevant registers per Rev. 1.2
249 ret=i2c_master_send(c,buf,4);
251 ret=i2c_master_send(c,buf+5,4);
253 ret=i2c_master_send(c,buf+11,3);
255 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
257 // wait for PLLs to lock (per manual), retry LINT if not.
258 for(lint_try=0; lint_try<2; lint_try++) {
259 lock=mt2032_check_lo_lock(c);
262 lock=mt2032_optimize_vco(c,sel,lock);
265 tuner_dbg("mt2032: re-init PLLs by LINT\n");
267 buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs
268 i2c_master_send(c,buf,2);
271 i2c_master_send(c,buf,2);
275 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
278 buf[1]=0x20; // LOGC for optimal phase noise
279 ret=i2c_master_send(c,buf,2);
281 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
285 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
287 struct tuner *t = i2c_get_clientdata(c);
290 // signal bandwidth and picture carrier
291 if (t->std & V4L2_STD_525_60) {
303 mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
304 1090*1000*1000, if2, from, to);
307 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
309 struct tuner *t = i2c_get_clientdata(c);
310 struct microtune_priv *priv = t->priv;
311 int if2 = priv->radio_if2;
313 // per Manual for FM tuning: first if center freq. 1085 MHz
314 mt2032_set_if_freq(c, freq * 1000 / 16,
315 1085*1000*1000,if2,if2,if2);
318 static struct tuner_operations mt2032_tuner_ops = {
319 .set_tv_freq = mt2032_set_tv_freq,
320 .set_radio_freq = mt2032_set_radio_freq,
321 .release = microtune_release,
324 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
325 static int mt2032_init(struct i2c_client *c)
327 struct tuner *t = i2c_get_clientdata(c);
328 struct microtune_priv *priv = t->priv;
329 unsigned char buf[21];
332 // Initialize Registers per spec.
333 buf[1]=2; // Index to register 2
337 ret=i2c_master_send(c,buf+1,4);
339 buf[5]=6; // Index register 6
345 ret=i2c_master_send(c,buf+5,6);
347 buf[12]=13; // Index register 13
349 ret=i2c_master_send(c,buf+12,2);
351 // Adjust XOGC (register 7), wait for XOK
354 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
357 i2c_master_send(c,buf,1);
358 i2c_master_recv(c,buf,1);
360 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
364 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
366 xogc=4; // min. 4 per spec
371 ret=i2c_master_send(c,buf,2);
373 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
377 memcpy(&t->ops, &mt2032_tuner_ops, sizeof(struct tuner_operations));
382 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
384 struct tuner *t = i2c_get_clientdata(c);
385 unsigned char buf[2];
389 buf[1] = antenna ? 0x11 : 0x10;
390 ret=i2c_master_send(c,buf,2);
391 tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
394 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
396 struct tuner *t = i2c_get_clientdata(c);
397 unsigned int if1=1218*1000*1000;
398 unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
400 unsigned char buf[6];
402 tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
406 f_lo1=(f_lo1/1000000)*1000000;
408 f_lo2=f_lo1-freq-if2;
409 f_lo2=(f_lo2/50000)*50000;
414 f_lo1_modulo= f_lo1-(lo1*4000000);
415 f_lo2_modulo= f_lo2-(lo2*4000000);
417 num1=4*f_lo1_modulo/4000000;
418 num2=4096*(f_lo2_modulo/1000)/4000;
423 div1b=lo1-(div1a+1)*12;
426 div2b=lo2-(div2a+1)*8;
428 if (tuner_debug > 1) {
429 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
430 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
431 num1,num2,div1a,div1b,div2a,div2b);
435 buf[1]= 4*div1b + num1;
436 if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
439 buf[3]=32*div2b + num2/256;
440 buf[4]=num2-(num2/256)*256;
442 if(num2!=0) buf[5]=buf[5]|0x40;
444 if (tuner_debug > 1) {
446 tuner_dbg("bufs is: ");
448 printk("%x ",buf[i]);
452 ret=i2c_master_send(c,buf,6);
454 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
457 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
459 struct tuner *t = i2c_get_clientdata(c);
462 if (t->std & V4L2_STD_525_60) {
469 if (V4L2_TUNER_DIGITAL_TV == t->mode) {
470 // DVB (pinnacle 300i)
473 mt2050_set_if_freq(c, freq*62500, if2);
474 mt2050_set_antenna(c, tv_antenna);
477 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
479 struct tuner *t = i2c_get_clientdata(c);
480 struct microtune_priv *priv = t->priv;
481 int if2 = priv->radio_if2;
483 mt2050_set_if_freq(c, freq * 1000 / 16, if2);
484 mt2050_set_antenna(c, radio_antenna);
487 static struct tuner_operations mt2050_tuner_ops = {
488 .set_tv_freq = mt2050_set_tv_freq,
489 .set_radio_freq = mt2050_set_radio_freq,
490 .release = microtune_release,
493 static int mt2050_init(struct i2c_client *c)
495 struct tuner *t = i2c_get_clientdata(c);
496 unsigned char buf[2];
501 ret=i2c_master_send(c,buf,2); // power
505 ret=i2c_master_send(c,buf,2); // m1lo
508 ret=i2c_master_send(c,buf,1);
509 i2c_master_recv(c,buf,1);
511 tuner_dbg("mt2050: sro is %x\n",buf[0]);
513 memcpy(&t->ops, &mt2050_tuner_ops, sizeof(struct tuner_operations));
518 int microtune_init(struct i2c_client *c)
520 struct microtune_priv *priv = NULL;
521 struct tuner *t = i2c_get_clientdata(c);
523 unsigned char buf[21];
526 priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL);
531 priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */
533 memset(buf,0,sizeof(buf));
535 if (t->std & V4L2_STD_525_60) {
536 tuner_dbg("pinnacle ntsc\n");
537 priv->radio_if2 = 41300 * 1000;
539 tuner_dbg("pinnacle pal\n");
540 priv->radio_if2 = 33300 * 1000;
544 i2c_master_send(c,buf,1);
545 i2c_master_recv(c,buf,21);
548 tuner_dbg("MT20xx hexdump:");
550 printk(" %02x",buf[i]);
551 if(((i+1)%8)==0) printk(" ");
555 company_code = buf[0x11] << 8 | buf[0x12];
556 tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
557 company_code,buf[0x13],buf[0x14]);
560 if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
561 NULL != microtune_part[buf[0x13]])
562 name = microtune_part[buf[0x13]];
571 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
576 strlcpy(c->name, name, sizeof(c->name));
577 tuner_info("microtune %s found, OK\n",name);
582 * Overrides for Emacs so that we follow Linus's tabbing style.
583 * ---------------------------------------------------------------------------