553 lines
12 KiB
C
553 lines
12 KiB
C
/*
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*
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* i2c tv tuner chip device driver
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* controls microtune tuners, mt2032 + mt2050 at the moment.
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*/
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/videodev.h>
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#include <linux/moduleparam.h>
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#include <media/tuner.h>
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/* ---------------------------------------------------------------------- */
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static unsigned int optimize_vco = 1;
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module_param(optimize_vco, int, 0644);
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static unsigned int tv_antenna = 1;
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module_param(tv_antenna, int, 0644);
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static unsigned int radio_antenna = 0;
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module_param(radio_antenna, int, 0644);
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/* from tuner-core.c */
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extern int tuner_debug;
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/* ---------------------------------------------------------------------- */
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#define MT2032 0x04
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#define MT2030 0x06
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#define MT2040 0x07
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#define MT2050 0x42
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static char *microtune_part[] = {
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[ MT2030 ] = "MT2030",
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[ MT2032 ] = "MT2032",
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[ MT2040 ] = "MT2040",
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[ MT2050 ] = "MT2050",
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};
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// IsSpurInBand()?
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static int mt2032_spurcheck(struct i2c_client *c,
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int f1, int f2, int spectrum_from,int spectrum_to)
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{
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struct tuner *t = i2c_get_clientdata(c);
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int n1=1,n2,f;
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f1=f1/1000; //scale to kHz to avoid 32bit overflows
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f2=f2/1000;
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spectrum_from/=1000;
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spectrum_to/=1000;
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tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n",
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f1,f2,spectrum_from,spectrum_to);
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do {
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n2=-n1;
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f=n1*(f1-f2);
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do {
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n2--;
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f=f-f2;
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tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);
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if( (f>spectrum_from) && (f<spectrum_to))
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tuner_dbg("mt2032 spurcheck triggered: %d\n",n1);
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} while ( (f>(f2-spectrum_to)) || (n2>-5));
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n1++;
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} while (n1<5);
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return 1;
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}
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static int mt2032_compute_freq(struct i2c_client *c,
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unsigned int rfin,
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unsigned int if1, unsigned int if2,
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unsigned int spectrum_from,
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unsigned int spectrum_to,
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unsigned char *buf,
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int *ret_sel,
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unsigned int xogc) //all in Hz
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
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desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;
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fref= 5250 *1000; //5.25MHz
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desired_lo1=rfin+if1;
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lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
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lo1n=lo1/8;
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lo1a=lo1-(lo1n*8);
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s=rfin/1000/1000+1090;
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if(optimize_vco) {
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if(s>1890) sel=0;
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else if(s>1720) sel=1;
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else if(s>1530) sel=2;
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else if(s>1370) sel=3;
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else sel=4; // >1090
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}
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else {
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if(s>1790) sel=0; // <1958
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else if(s>1617) sel=1;
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else if(s>1449) sel=2;
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else if(s>1291) sel=3;
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else sel=4; // >1090
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}
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*ret_sel=sel;
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lo1freq=(lo1a+8*lo1n)*fref;
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tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
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rfin,lo1,lo1n,lo1a,sel,lo1freq);
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desired_lo2=lo1freq-rfin-if2;
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lo2=(desired_lo2)/fref;
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lo2n=lo2/8;
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lo2a=lo2-(lo2n*8);
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lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
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lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;
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tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
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rfin,lo2,lo2n,lo2a,lo2num,lo2freq);
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if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
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tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n",
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lo1a, lo1n, lo2a,lo2n);
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return(-1);
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}
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mt2032_spurcheck(c, lo1freq, desired_lo2, spectrum_from, spectrum_to);
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// should recalculate lo1 (one step up/down)
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// set up MT2032 register map for transfer over i2c
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buf[0]=lo1n-1;
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buf[1]=lo1a | (sel<<4);
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buf[2]=0x86; // LOGC
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buf[3]=0x0f; //reserved
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buf[4]=0x1f;
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buf[5]=(lo2n-1) | (lo2a<<5);
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if(rfin >400*1000*1000)
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buf[6]=0xe4;
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else
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buf[6]=0xf4; // set PKEN per rev 1.2
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buf[7]=8+xogc;
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buf[8]=0xc3; //reserved
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buf[9]=0x4e; //reserved
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buf[10]=0xec; //reserved
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buf[11]=(lo2num&0xff);
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buf[12]=(lo2num>>8) |0x80; // Lo2RST
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return 0;
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}
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static int mt2032_check_lo_lock(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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int try,lock=0;
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unsigned char buf[2];
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for(try=0;try<10;try++) {
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buf[0]=0x0e;
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i2c_master_send(c,buf,1);
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i2c_master_recv(c,buf,1);
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tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]);
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lock=buf[0] &0x06;
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if (lock==6)
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break;
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tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
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udelay(1000);
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}
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return lock;
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}
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static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned char buf[2];
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int tad1;
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buf[0]=0x0f;
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i2c_master_send(c,buf,1);
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i2c_master_recv(c,buf,1);
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tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]);
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tad1=buf[0]&0x07;
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if(tad1 ==0) return lock;
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if(tad1 ==1) return lock;
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if(tad1==2) {
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if(sel==0)
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return lock;
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else sel--;
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}
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else {
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if(sel<4)
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sel++;
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else
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return lock;
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}
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tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel);
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buf[0]=0x0f;
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buf[1]=sel;
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i2c_master_send(c,buf,2);
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lock=mt2032_check_lo_lock(c);
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return lock;
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}
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static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
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unsigned int if1, unsigned int if2,
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unsigned int from, unsigned int to)
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{
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unsigned char buf[21];
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int lint_try,ret,sel,lock=0;
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struct tuner *t = i2c_get_clientdata(c);
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tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",
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rfin,if1,if2,from,to);
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buf[0]=0;
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ret=i2c_master_send(c,buf,1);
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i2c_master_recv(c,buf,21);
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buf[0]=0;
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ret=mt2032_compute_freq(c,rfin,if1,if2,from,to,&buf[1],&sel,t->xogc);
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if (ret<0)
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return;
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// send only the relevant registers per Rev. 1.2
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buf[0]=0;
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ret=i2c_master_send(c,buf,4);
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buf[5]=5;
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ret=i2c_master_send(c,buf+5,4);
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buf[11]=11;
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ret=i2c_master_send(c,buf+11,3);
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if(ret!=3)
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tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret);
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// wait for PLLs to lock (per manual), retry LINT if not.
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for(lint_try=0; lint_try<2; lint_try++) {
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lock=mt2032_check_lo_lock(c);
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if(optimize_vco)
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lock=mt2032_optimize_vco(c,sel,lock);
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if(lock==6) break;
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tuner_dbg("mt2032: re-init PLLs by LINT\n");
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buf[0]=7;
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buf[1]=0x80 +8+t->xogc; // set LINT to re-init PLLs
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i2c_master_send(c,buf,2);
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mdelay(10);
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buf[1]=8+t->xogc;
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i2c_master_send(c,buf,2);
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}
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if (lock!=6)
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tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n");
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buf[0]=2;
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buf[1]=0x20; // LOGC for optimal phase noise
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ret=i2c_master_send(c,buf,2);
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if (ret!=2)
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tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
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}
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static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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int if2,from,to;
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// signal bandwidth and picture carrier
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if (t->std & V4L2_STD_525_60) {
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// NTSC
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from = 40750*1000;
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to = 46750*1000;
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if2 = 45750*1000;
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} else {
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// PAL
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from = 32900*1000;
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to = 39900*1000;
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if2 = 38900*1000;
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}
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mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
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1090*1000*1000, if2, from, to);
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}
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static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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int if2 = t->radio_if2;
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// per Manual for FM tuning: first if center freq. 1085 MHz
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mt2032_set_if_freq(c, freq * 1000 / 16,
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1085*1000*1000,if2,if2,if2);
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}
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// Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
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static int mt2032_init(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned char buf[21];
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int ret,xogc,xok=0;
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// Initialize Registers per spec.
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buf[1]=2; // Index to register 2
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buf[2]=0xff;
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buf[3]=0x0f;
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buf[4]=0x1f;
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ret=i2c_master_send(c,buf+1,4);
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buf[5]=6; // Index register 6
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buf[6]=0xe4;
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buf[7]=0x8f;
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buf[8]=0xc3;
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buf[9]=0x4e;
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buf[10]=0xec;
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ret=i2c_master_send(c,buf+5,6);
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buf[12]=13; // Index register 13
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buf[13]=0x32;
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ret=i2c_master_send(c,buf+12,2);
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// Adjust XOGC (register 7), wait for XOK
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xogc=7;
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do {
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tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
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mdelay(10);
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buf[0]=0x0e;
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i2c_master_send(c,buf,1);
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i2c_master_recv(c,buf,1);
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xok=buf[0]&0x01;
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tuner_dbg("mt2032: xok = 0x%02x\n",xok);
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if (xok == 1) break;
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xogc--;
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tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07);
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if (xogc == 3) {
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xogc=4; // min. 4 per spec
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break;
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}
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buf[0]=0x07;
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buf[1]=0x88 + xogc;
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ret=i2c_master_send(c,buf,2);
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if (ret!=2)
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tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret);
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} while (xok != 1 );
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t->xogc=xogc;
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t->set_tv_freq = mt2032_set_tv_freq;
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t->set_radio_freq = mt2032_set_radio_freq;
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return(1);
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}
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static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned char buf[2];
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int ret;
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buf[0] = 6;
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buf[1] = antenna ? 0x11 : 0x10;
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ret=i2c_master_send(c,buf,2);
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tuner_dbg("mt2050: enabled antenna connector %d\n", antenna);
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}
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static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned int if1=1218*1000*1000;
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unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
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int ret;
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unsigned char buf[6];
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tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
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freq,if1,if2);
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f_lo1=freq+if1;
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f_lo1=(f_lo1/1000000)*1000000;
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f_lo2=f_lo1-freq-if2;
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f_lo2=(f_lo2/50000)*50000;
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lo1=f_lo1/4000000;
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lo2=f_lo2/4000000;
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f_lo1_modulo= f_lo1-(lo1*4000000);
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f_lo2_modulo= f_lo2-(lo2*4000000);
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num1=4*f_lo1_modulo/4000000;
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num2=4096*(f_lo2_modulo/1000)/4000;
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// todo spurchecks
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div1a=(lo1/12)-1;
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div1b=lo1-(div1a+1)*12;
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div2a=(lo2/8)-1;
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div2b=lo2-(div2a+1)*8;
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if (tuner_debug > 1) {
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tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2);
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tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",
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num1,num2,div1a,div1b,div2a,div2b);
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}
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buf[0]=1;
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buf[1]= 4*div1b + num1;
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if(freq<275*1000*1000) buf[1] = buf[1]|0x80;
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buf[2]=div1a;
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buf[3]=32*div2b + num2/256;
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buf[4]=num2-(num2/256)*256;
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buf[5]=div2a;
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if(num2!=0) buf[5]=buf[5]|0x40;
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if (tuner_debug > 1) {
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int i;
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tuner_dbg("bufs is: ");
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for(i=0;i<6;i++)
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printk("%x ",buf[i]);
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printk("\n");
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}
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ret=i2c_master_send(c,buf,6);
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if (ret!=6)
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tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret);
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}
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static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned int if2;
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if (t->std & V4L2_STD_525_60) {
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// NTSC
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if2 = 45750*1000;
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} else {
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// PAL
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if2 = 38900*1000;
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}
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if (V4L2_TUNER_DIGITAL_TV == t->mode) {
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// DVB (pinnacle 300i)
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if2 = 36150*1000;
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}
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mt2050_set_if_freq(c, freq*62500, if2);
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mt2050_set_antenna(c, tv_antenna);
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}
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static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
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{
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struct tuner *t = i2c_get_clientdata(c);
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int if2 = t->radio_if2;
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mt2050_set_if_freq(c, freq * 1000 / 16, if2);
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mt2050_set_antenna(c, radio_antenna);
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}
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static int mt2050_init(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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unsigned char buf[2];
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int ret;
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buf[0]=6;
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buf[1]=0x10;
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ret=i2c_master_send(c,buf,2); // power
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|
|
buf[0]=0x0f;
|
|
buf[1]=0x0f;
|
|
ret=i2c_master_send(c,buf,2); // m1lo
|
|
|
|
buf[0]=0x0d;
|
|
ret=i2c_master_send(c,buf,1);
|
|
i2c_master_recv(c,buf,1);
|
|
|
|
tuner_dbg("mt2050: sro is %x\n",buf[0]);
|
|
t->set_tv_freq = mt2050_set_tv_freq;
|
|
t->set_radio_freq = mt2050_set_radio_freq;
|
|
return 0;
|
|
}
|
|
|
|
int microtune_init(struct i2c_client *c)
|
|
{
|
|
struct tuner *t = i2c_get_clientdata(c);
|
|
char *name;
|
|
unsigned char buf[21];
|
|
int company_code;
|
|
|
|
memset(buf,0,sizeof(buf));
|
|
t->set_tv_freq = NULL;
|
|
t->set_radio_freq = NULL;
|
|
t->standby = NULL;
|
|
if (t->std & V4L2_STD_525_60) {
|
|
tuner_dbg("pinnacle ntsc\n");
|
|
t->radio_if2 = 41300 * 1000;
|
|
} else {
|
|
tuner_dbg("pinnacle pal\n");
|
|
t->radio_if2 = 33300 * 1000;
|
|
}
|
|
name = "unknown";
|
|
|
|
i2c_master_send(c,buf,1);
|
|
i2c_master_recv(c,buf,21);
|
|
if (tuner_debug) {
|
|
int i;
|
|
tuner_dbg("MT20xx hexdump:");
|
|
for(i=0;i<21;i++) {
|
|
printk(" %02x",buf[i]);
|
|
if(((i+1)%8)==0) printk(" ");
|
|
}
|
|
printk("\n");
|
|
}
|
|
company_code = buf[0x11] << 8 | buf[0x12];
|
|
tuner_info("microtune: companycode=%04x part=%02x rev=%02x\n",
|
|
company_code,buf[0x13],buf[0x14]);
|
|
|
|
|
|
if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
|
|
NULL != microtune_part[buf[0x13]])
|
|
name = microtune_part[buf[0x13]];
|
|
switch (buf[0x13]) {
|
|
case MT2032:
|
|
mt2032_init(c);
|
|
break;
|
|
case MT2050:
|
|
mt2050_init(c);
|
|
break;
|
|
default:
|
|
tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n",
|
|
name);
|
|
return 0;
|
|
}
|
|
|
|
strlcpy(c->name, name, sizeof(c->name));
|
|
tuner_info("microtune %s found, OK\n",name);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|