Merge git://git.infradead.org/mtd-2.6
[linux-2.6] / drivers / media / video / mt20xx.c
1 /*
2  *
3  * i2c tv tuner chip device driver
4  * controls microtune tuners, mt2032 + mt2050 at the moment.
5  */
6 #include <linux/delay.h>
7 #include <linux/i2c.h>
8 #include <linux/videodev.h>
9 #include <linux/moduleparam.h>
10 #include <media/tuner.h>
11
12 /* ---------------------------------------------------------------------- */
13
14 static unsigned int optimize_vco  = 1;
15 module_param(optimize_vco,      int, 0644);
16
17 static unsigned int tv_antenna    = 1;
18 module_param(tv_antenna,        int, 0644);
19
20 static unsigned int radio_antenna = 0;
21 module_param(radio_antenna,     int, 0644);
22
23 /* from tuner-core.c */
24 extern int tuner_debug;
25
26 /* ---------------------------------------------------------------------- */
27
28 #define MT2032 0x04
29 #define MT2030 0x06
30 #define MT2040 0x07
31 #define MT2050 0x42
32
33 static char *microtune_part[] = {
34         [ MT2030 ] = "MT2030",
35         [ MT2032 ] = "MT2032",
36         [ MT2040 ] = "MT2040",
37         [ MT2050 ] = "MT2050",
38 };
39
40 // IsSpurInBand()?
41 static int mt2032_spurcheck(struct i2c_client *c,
42                             int f1, int f2, int spectrum_from,int spectrum_to)
43 {
44         struct tuner *t = i2c_get_clientdata(c);
45         int n1=1,n2,f;
46
47         f1=f1/1000; //scale to kHz to avoid 32bit overflows
48         f2=f2/1000;
49         spectrum_from/=1000;
50         spectrum_to/=1000;
51
52         tuner_dbg("spurcheck f1=%d f2=%d  from=%d to=%d\n",
53                   f1,f2,spectrum_from,spectrum_to);
54
55         do {
56             n2=-n1;
57             f=n1*(f1-f2);
58             do {
59                 n2--;
60                 f=f-f2;
61                 tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
62
63                 if( (f>spectrum_from) && (f<spectrum_to))
64                         tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
65             } while ( (f>(f2-spectrum_to)) || (n2>-5));
66             n1++;
67         } while (n1<5);
68
69         return 1;
70 }
71
72 static int mt2032_compute_freq(struct i2c_client *c,
73                                unsigned int rfin,
74                                unsigned int if1, unsigned int if2,
75                                unsigned int spectrum_from,
76                                unsigned int spectrum_to,
77                                unsigned char *buf,
78                                int *ret_sel,
79                                unsigned int xogc) //all in Hz
80 {
81         struct tuner *t = i2c_get_clientdata(c);
82         unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
83                 desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
84
85         fref= 5250 *1000; //5.25MHz
86         desired_lo1=rfin+if1;
87
88         lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
89         lo1n=lo1/8;
90         lo1a=lo1-(lo1n*8);
91
92         s=rfin/1000/1000+1090;
93
94         if(optimize_vco) {
95                 if(s>1890) sel=0;
96                 else if(s>1720) sel=1;
97                 else if(s>1530) sel=2;
98                 else if(s>1370) sel=3;
99                 else sel=4; // >1090
100         }
101         else {
102                 if(s>1790) sel=0; // <1958
103                 else if(s>1617) sel=1;
104                 else if(s>1449) sel=2;
105                 else if(s>1291) sel=3;
106                 else sel=4; // >1090
107         }
108         *ret_sel=sel;
109
110         lo1freq=(lo1a+8*lo1n)*fref;
111
112         tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
113                   rfin,lo1,lo1n,lo1a,sel,lo1freq);
114
115         desired_lo2=lo1freq-rfin-if2;
116         lo2=(desired_lo2)/fref;
117         lo2n=lo2/8;
118         lo2a=lo2-(lo2n*8);
119         lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
120         lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
121
122         tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
123                   rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
124
125         if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
126                 tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
127                            lo1a, lo1n, lo2a,lo2n);
128                 return(-1);
129         }
130
131         mt2032_spurcheck(c, lo1freq, desired_lo2,  spectrum_from, spectrum_to);
132         // should recalculate lo1 (one step up/down)
133
134         // set up MT2032 register map for transfer over i2c
135         buf[0]=lo1n-1;
136         buf[1]=lo1a | (sel<<4);
137         buf[2]=0x86; // LOGC
138         buf[3]=0x0f; //reserved
139         buf[4]=0x1f;
140         buf[5]=(lo2n-1) | (lo2a<<5);
141         if(rfin >400*1000*1000)
142                 buf[6]=0xe4;
143         else
144                 buf[6]=0xf4; // set PKEN per rev 1.2
145         buf[7]=8+xogc;
146         buf[8]=0xc3; //reserved
147         buf[9]=0x4e; //reserved
148         buf[10]=0xec; //reserved
149         buf[11]=(lo2num&0xff);
150         buf[12]=(lo2num>>8) |0x80; // Lo2RST
151
152         return 0;
153 }
154
155 static int mt2032_check_lo_lock(struct i2c_client *c)
156 {
157         struct tuner *t = i2c_get_clientdata(c);
158         int try,lock=0;
159         unsigned char buf[2];
160
161         for(try=0;try<10;try++) {
162                 buf[0]=0x0e;
163                 i2c_master_send(c,buf,1);
164                 i2c_master_recv(c,buf,1);
165                 tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
166                 lock=buf[0] &0x06;
167
168                 if (lock==6)
169                         break;
170
171                 tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
172                 udelay(1000);
173         }
174         return lock;
175 }
176
177 static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
178 {
179         struct tuner *t = i2c_get_clientdata(c);
180         unsigned char buf[2];
181         int tad1;
182
183         buf[0]=0x0f;
184         i2c_master_send(c,buf,1);
185         i2c_master_recv(c,buf,1);
186         tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
187         tad1=buf[0]&0x07;
188
189         if(tad1 ==0) return lock;
190         if(tad1 ==1) return lock;
191
192         if(tad1==2) {
193                 if(sel==0)
194                         return lock;
195                 else sel--;
196         }
197         else {
198                 if(sel<4)
199                         sel++;
200                 else
201                         return lock;
202         }
203
204         tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
205
206         buf[0]=0x0f;
207         buf[1]=sel;
208         i2c_master_send(c,buf,2);
209         lock=mt2032_check_lo_lock(c);
210         return lock;
211 }
212
213
214 static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
215                                unsigned int if1, unsigned int if2,
216                                unsigned int from, unsigned int to)
217 {
218         unsigned char buf[21];
219         int lint_try,ret,sel,lock=0;
220         struct tuner *t = i2c_get_clientdata(c);
221
222         tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
223                   rfin,if1,if2,from,to);
224
225         buf[0]=0;
226         ret=i2c_master_send(c,buf,1);
227         i2c_master_recv(c,buf,21);
228
229         buf[0]=0;
230         ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,t->xogc);
231         if (ret<0)
232                 return;
233
234         // send only the relevant registers per Rev. 1.2
235         buf[0]=0;
236         ret=i2c_master_send(c,buf,4);
237         buf[5]=5;
238         ret=i2c_master_send(c,buf+5,4);
239         buf[11]=11;
240         ret=i2c_master_send(c,buf+11,3);
241         if(ret!=3)
242                 tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
243
244         // wait for PLLs to lock (per manual), retry LINT if not.
245         for(lint_try=0; lint_try<2; lint_try++) {
246                 lock=mt2032_check_lo_lock(c);
247
248                 if(optimize_vco)
249                         lock=mt2032_optimize_vco(c,sel,lock);
250                 if(lock==6) break;
251
252                 tuner_dbg("mt2032: re-init PLLs by LINT\n");
253                 buf[0]=7;
254                 buf[1]=0x80 +8+t->xogc; // set LINT to re-init PLLs
255                 i2c_master_send(c,buf,2);
256                 mdelay(10);
257                 buf[1]=8+t->xogc;
258                 i2c_master_send(c,buf,2);
259         }
260
261         if (lock!=6)
262                 tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
263
264         buf[0]=2;
265         buf[1]=0x20; // LOGC for optimal phase noise
266         ret=i2c_master_send(c,buf,2);
267         if (ret!=2)
268                 tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
269 }
270
271
272 static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
273 {
274         struct tuner *t = i2c_get_clientdata(c);
275         int if2,from,to;
276
277         // signal bandwidth and picture carrier
278         if (t->std & V4L2_STD_525_60) {
279                 // NTSC
280                 from = 40750*1000;
281                 to   = 46750*1000;
282                 if2  = 45750*1000;
283         } else {
284                 // PAL
285                 from = 32900*1000;
286                 to   = 39900*1000;
287                 if2  = 38900*1000;
288         }
289
290         mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
291                            1090*1000*1000, if2, from, to);
292 }
293
294 static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
295 {
296         struct tuner *t = i2c_get_clientdata(c);
297         int if2 = t->radio_if2;
298
299         // per Manual for FM tuning: first if center freq. 1085 MHz
300         mt2032_set_if_freq(c, freq * 1000 / 16,
301                               1085*1000*1000,if2,if2,if2);
302 }
303
304 // Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
305 static int mt2032_init(struct i2c_client *c)
306 {
307         struct tuner *t = i2c_get_clientdata(c);
308         unsigned char buf[21];
309         int ret,xogc,xok=0;
310
311         // Initialize Registers per spec.
312         buf[1]=2; // Index to register 2
313         buf[2]=0xff;
314         buf[3]=0x0f;
315         buf[4]=0x1f;
316         ret=i2c_master_send(c,buf+1,4);
317
318         buf[5]=6; // Index register 6
319         buf[6]=0xe4;
320         buf[7]=0x8f;
321         buf[8]=0xc3;
322         buf[9]=0x4e;
323         buf[10]=0xec;
324         ret=i2c_master_send(c,buf+5,6);
325
326         buf[12]=13;  // Index register 13
327         buf[13]=0x32;
328         ret=i2c_master_send(c,buf+12,2);
329
330         // Adjust XOGC (register 7), wait for XOK
331         xogc=7;
332         do {
333                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
334                 mdelay(10);
335                 buf[0]=0x0e;
336                 i2c_master_send(c,buf,1);
337                 i2c_master_recv(c,buf,1);
338                 xok=buf[0]&0x01;
339                 tuner_dbg("mt2032: xok = 0x%02x\n",xok);
340                 if (xok == 1) break;
341
342                 xogc--;
343                 tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
344                 if (xogc == 3) {
345                         xogc=4; // min. 4 per spec
346                         break;
347                 }
348                 buf[0]=0x07;
349                 buf[1]=0x88 + xogc;
350                 ret=i2c_master_send(c,buf,2);
351                 if (ret!=2)
352                         tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
353         } while (xok != 1 );
354         t->xogc=xogc;
355
356         t->set_tv_freq    = mt2032_set_tv_freq;
357         t->set_radio_freq = mt2032_set_radio_freq;
358         return(1);
359 }
360
361 static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
362 {
363         struct tuner *t = i2c_get_clientdata(c);
364        unsigned char buf[2];
365        int ret;
366
367        buf[0] = 6;
368        buf[1] = antenna ? 0x11 : 0x10;
369        ret=i2c_master_send(c,buf,2);
370        tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
371 }
372
373 static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
374 {
375         struct tuner *t = i2c_get_clientdata(c);
376         unsigned int if1=1218*1000*1000;
377         unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
378         int ret;
379         unsigned char buf[6];
380
381         tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
382                   freq,if1,if2);
383
384         f_lo1=freq+if1;
385         f_lo1=(f_lo1/1000000)*1000000;
386
387         f_lo2=f_lo1-freq-if2;
388         f_lo2=(f_lo2/50000)*50000;
389
390         lo1=f_lo1/4000000;
391         lo2=f_lo2/4000000;
392
393         f_lo1_modulo= f_lo1-(lo1*4000000);
394         f_lo2_modulo= f_lo2-(lo2*4000000);
395
396         num1=4*f_lo1_modulo/4000000;
397         num2=4096*(f_lo2_modulo/1000)/4000;
398
399         // todo spurchecks
400
401         div1a=(lo1/12)-1;
402         div1b=lo1-(div1a+1)*12;
403
404         div2a=(lo2/8)-1;
405         div2b=lo2-(div2a+1)*8;
406
407         if (tuner_debug > 1) {
408                 tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
409                 tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
410                           num1,num2,div1a,div1b,div2a,div2b);
411         }
412
413         buf[0]=1;
414         buf[1]= 4*div1b + num1;
415         if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
416
417         buf[2]=div1a;
418         buf[3]=32*div2b + num2/256;
419         buf[4]=num2-(num2/256)*256;
420         buf[5]=div2a;
421         if(num2!=0) buf[5]=buf[5]|0x40;
422
423         if (tuner_debug > 1) {
424                 int i;
425                 tuner_dbg("bufs is: ");
426                 for(i=0;i<6;i++)
427                         printk("%x ",buf[i]);
428                 printk("\n");
429         }
430
431         ret=i2c_master_send(c,buf,6);
432         if (ret!=6)
433                 tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
434 }
435
436 static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
437 {
438         struct tuner *t = i2c_get_clientdata(c);
439         unsigned int if2;
440
441         if (t->std & V4L2_STD_525_60) {
442                 // NTSC
443                 if2 = 45750*1000;
444         } else {
445                 // PAL
446                 if2 = 38900*1000;
447         }
448         if (V4L2_TUNER_DIGITAL_TV == t->mode) {
449                 // DVB (pinnacle 300i)
450                 if2 = 36150*1000;
451         }
452         mt2050_set_if_freq(c, freq*62500, if2);
453         mt2050_set_antenna(c, tv_antenna);
454 }
455
456 static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
457 {
458         struct tuner *t = i2c_get_clientdata(c);
459         int if2 = t->radio_if2;
460
461         mt2050_set_if_freq(c, freq * 1000 / 16, if2);
462         mt2050_set_antenna(c, radio_antenna);
463 }
464
465 static int mt2050_init(struct i2c_client *c)
466 {
467         struct tuner *t = i2c_get_clientdata(c);
468         unsigned char buf[2];
469         int ret;
470
471         buf[0]=6;
472         buf[1]=0x10;
473         ret=i2c_master_send(c,buf,2); //  power
474
475         buf[0]=0x0f;
476         buf[1]=0x0f;
477         ret=i2c_master_send(c,buf,2); // m1lo
478
479         buf[0]=0x0d;
480         ret=i2c_master_send(c,buf,1);
481         i2c_master_recv(c,buf,1);
482
483         tuner_dbg("mt2050: sro is %x\n",buf[0]);
484         t->set_tv_freq    = mt2050_set_tv_freq;
485         t->set_radio_freq = mt2050_set_radio_freq;
486         return 0;
487 }
488
489 int microtune_init(struct i2c_client *c)
490 {
491         struct tuner *t = i2c_get_clientdata(c);
492         char *name;
493         unsigned char buf[21];
494         int company_code;
495
496         memset(buf,0,sizeof(buf));
497         t->set_tv_freq    = NULL;
498         t->set_radio_freq = NULL;
499         t->standby    = NULL;
500         if (t->std & V4L2_STD_525_60) {
501                 tuner_dbg("pinnacle ntsc\n");
502                 t->radio_if2 = 41300 * 1000;
503         } else {
504                 tuner_dbg("pinnacle pal\n");
505                 t->radio_if2 = 33300 * 1000;
506         }
507         name = "unknown";
508
509         i2c_master_send(c,buf,1);
510         i2c_master_recv(c,buf,21);
511         if (tuner_debug) {
512                 int i;
513                 tuner_dbg("MT20xx hexdump:");
514                 for(i=0;i<21;i++) {
515                         printk(" %02x",buf[i]);
516                         if(((i+1)%8)==0) printk(" ");
517                 }
518                 printk("\n");
519         }
520         company_code = buf[0x11] << 8 | buf[0x12];
521         tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
522                    company_code,buf[0x13],buf[0x14]);
523
524
525         if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
526             NULL != microtune_part[buf[0x13]])
527                 name = microtune_part[buf[0x13]];
528         switch (buf[0x13]) {
529         case MT2032:
530                 mt2032_init(c);
531                 break;
532         case MT2050:
533                 mt2050_init(c);
534                 break;
535         default:
536                 tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
537                            name);
538                 return 0;
539         }
540
541         strlcpy(c->name, name, sizeof(c->name));
542         tuner_info("microtune %s found, OK\n",name);
543         return 0;
544 }
545
546 /*
547  * Overrides for Emacs so that we follow Linus's tabbing style.
548  * ---------------------------------------------------------------------------
549  * Local variables:
550  * c-basic-offset: 8
551  * End:
552  */