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650 lines
15 KiB
650 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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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* This "mt20xx" module was split apart from the original "tuner" module. |
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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/slab.h> |
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#include <linux/videodev2.h> |
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#include "tuner-i2c.h" |
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#include "mt20xx.h" |
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static int debug; |
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module_param(debug, int, 0644); |
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MODULE_PARM_DESC(debug, "enable verbose debug messages"); |
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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; |
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module_param(radio_antenna, int, 0644); |
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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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struct microtune_priv { |
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struct tuner_i2c_props i2c_props; |
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unsigned int xogc; |
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//unsigned int radio_if2; |
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u32 frequency; |
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}; |
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static void microtune_release(struct dvb_frontend *fe) |
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{ |
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kfree(fe->tuner_priv); |
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fe->tuner_priv = NULL; |
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} |
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static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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*frequency = priv->frequency; |
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return 0; |
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} |
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// IsSpurInBand()? |
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static int mt2032_spurcheck(struct dvb_frontend *fe, |
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int f1, int f2, int spectrum_from,int spectrum_to) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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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 dvb_frontend *fe, |
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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 microtune_priv *priv = fe->tuner_priv; |
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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 > 7 || lo1n < 17 || lo1n > 48 || lo2a > 7 || lo2n < 17 || |
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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(fe, 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 dvb_frontend *fe) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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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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tuner_i2c_xfer_send(&priv->i2c_props,buf,1); |
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tuner_i2c_xfer_recv(&priv->i2c_props,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 dvb_frontend *fe,int sel,int lock) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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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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tuner_i2c_xfer_send(&priv->i2c_props,buf,1); |
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tuner_i2c_xfer_recv(&priv->i2c_props,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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tuner_i2c_xfer_send(&priv->i2c_props,buf,2); |
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lock=mt2032_check_lo_lock(fe); |
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return lock; |
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} |
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static void mt2032_set_if_freq(struct dvb_frontend *fe, 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 microtune_priv *priv = fe->tuner_priv; |
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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=tuner_i2c_xfer_send(&priv->i2c_props,buf,1); |
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tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); |
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buf[0]=0; |
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ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->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=tuner_i2c_xfer_send(&priv->i2c_props,buf,4); |
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buf[5]=5; |
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ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4); |
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buf[11]=11; |
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ret=tuner_i2c_xfer_send(&priv->i2c_props,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(fe); |
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if(optimize_vco) |
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lock=mt2032_optimize_vco(fe,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+priv->xogc; // set LINT to re-init PLLs |
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tuner_i2c_xfer_send(&priv->i2c_props,buf,2); |
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mdelay(10); |
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buf[1]=8+priv->xogc; |
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tuner_i2c_xfer_send(&priv->i2c_props,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=tuner_i2c_xfer_send(&priv->i2c_props,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 int mt2032_set_tv_freq(struct dvb_frontend *fe, |
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struct analog_parameters *params) |
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{ |
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int if2,from,to; |
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// signal bandwidth and picture carrier |
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if (params->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(fe, params->frequency*62500, |
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1090*1000*1000, if2, from, to); |
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return 0; |
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} |
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static int mt2032_set_radio_freq(struct dvb_frontend *fe, |
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struct analog_parameters *params) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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int if2; |
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if (params->std & V4L2_STD_525_60) { |
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tuner_dbg("pinnacle ntsc\n"); |
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if2 = 41300 * 1000; |
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} else { |
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tuner_dbg("pinnacle pal\n"); |
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if2 = 33300 * 1000; |
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} |
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// per Manual for FM tuning: first if center freq. 1085 MHz |
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mt2032_set_if_freq(fe, params->frequency * 125 / 2, |
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1085*1000*1000,if2,if2,if2); |
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return 0; |
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} |
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static int mt2032_set_params(struct dvb_frontend *fe, |
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struct analog_parameters *params) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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int ret = -EINVAL; |
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switch (params->mode) { |
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case V4L2_TUNER_RADIO: |
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ret = mt2032_set_radio_freq(fe, params); |
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priv->frequency = params->frequency * 125 / 2; |
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break; |
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case V4L2_TUNER_ANALOG_TV: |
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case V4L2_TUNER_DIGITAL_TV: |
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ret = mt2032_set_tv_freq(fe, params); |
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priv->frequency = params->frequency * 62500; |
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break; |
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} |
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return ret; |
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} |
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static const struct dvb_tuner_ops mt2032_tuner_ops = { |
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.set_analog_params = mt2032_set_params, |
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.release = microtune_release, |
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.get_frequency = microtune_get_frequency, |
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}; |
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// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001 |
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static int mt2032_init(struct dvb_frontend *fe) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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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=tuner_i2c_xfer_send(&priv->i2c_props,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=tuner_i2c_xfer_send(&priv->i2c_props,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=tuner_i2c_xfer_send(&priv->i2c_props,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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tuner_i2c_xfer_send(&priv->i2c_props,buf,1); |
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tuner_i2c_xfer_recv(&priv->i2c_props,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=tuner_i2c_xfer_send(&priv->i2c_props,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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priv->xogc=xogc; |
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memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops)); |
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return(1); |
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} |
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static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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unsigned char buf[2]; |
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buf[0] = 6; |
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buf[1] = antenna ? 0x11 : 0x10; |
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tuner_i2c_xfer_send(&priv->i2c_props, 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 dvb_frontend *fe,unsigned int freq, unsigned int if2) |
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{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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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 (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 (debug > 1) |
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tuner_dbg("bufs is: %*ph\n", 6, buf); |
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ret=tuner_i2c_xfer_send(&priv->i2c_props,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 int mt2050_set_tv_freq(struct dvb_frontend *fe, |
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struct analog_parameters *params) |
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{ |
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unsigned int if2; |
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if (params->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 == params->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(fe, params->frequency*62500, if2); |
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mt2050_set_antenna(fe, tv_antenna); |
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return 0; |
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} |
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static int mt2050_set_radio_freq(struct dvb_frontend *fe, |
|
struct analog_parameters *params) |
|
{ |
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struct microtune_priv *priv = fe->tuner_priv; |
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int if2; |
|
|
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if (params->std & V4L2_STD_525_60) { |
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tuner_dbg("pinnacle ntsc\n"); |
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if2 = 41300 * 1000; |
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} else { |
|
tuner_dbg("pinnacle pal\n"); |
|
if2 = 33300 * 1000; |
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} |
|
|
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mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2); |
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mt2050_set_antenna(fe, radio_antenna); |
|
|
|
return 0; |
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} |
|
|
|
static int mt2050_set_params(struct dvb_frontend *fe, |
|
struct analog_parameters *params) |
|
{ |
|
struct microtune_priv *priv = fe->tuner_priv; |
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int ret = -EINVAL; |
|
|
|
switch (params->mode) { |
|
case V4L2_TUNER_RADIO: |
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ret = mt2050_set_radio_freq(fe, params); |
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priv->frequency = params->frequency * 125 / 2; |
|
break; |
|
case V4L2_TUNER_ANALOG_TV: |
|
case V4L2_TUNER_DIGITAL_TV: |
|
ret = mt2050_set_tv_freq(fe, params); |
|
priv->frequency = params->frequency * 62500; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static const struct dvb_tuner_ops mt2050_tuner_ops = { |
|
.set_analog_params = mt2050_set_params, |
|
.release = microtune_release, |
|
.get_frequency = microtune_get_frequency, |
|
}; |
|
|
|
static int mt2050_init(struct dvb_frontend *fe) |
|
{ |
|
struct microtune_priv *priv = fe->tuner_priv; |
|
unsigned char buf[2]; |
|
|
|
buf[0] = 6; |
|
buf[1] = 0x10; |
|
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* power */ |
|
|
|
buf[0] = 0x0f; |
|
buf[1] = 0x0f; |
|
tuner_i2c_xfer_send(&priv->i2c_props, buf, 2); /* m1lo */ |
|
|
|
buf[0] = 0x0d; |
|
tuner_i2c_xfer_send(&priv->i2c_props, buf, 1); |
|
tuner_i2c_xfer_recv(&priv->i2c_props, buf, 1); |
|
|
|
tuner_dbg("mt2050: sro is %x\n", buf[0]); |
|
|
|
memcpy(&fe->ops.tuner_ops, &mt2050_tuner_ops, sizeof(struct dvb_tuner_ops)); |
|
|
|
return 0; |
|
} |
|
|
|
struct dvb_frontend *microtune_attach(struct dvb_frontend *fe, |
|
struct i2c_adapter* i2c_adap, |
|
u8 i2c_addr) |
|
{ |
|
struct microtune_priv *priv = NULL; |
|
char *name; |
|
unsigned char buf[21]; |
|
int company_code; |
|
|
|
priv = kzalloc(sizeof(struct microtune_priv), GFP_KERNEL); |
|
if (priv == NULL) |
|
return NULL; |
|
fe->tuner_priv = priv; |
|
|
|
priv->i2c_props.addr = i2c_addr; |
|
priv->i2c_props.adap = i2c_adap; |
|
priv->i2c_props.name = "mt20xx"; |
|
|
|
//priv->radio_if2 = 10700 * 1000; /* 10.7MHz - FM radio */ |
|
|
|
memset(buf,0,sizeof(buf)); |
|
|
|
name = "unknown"; |
|
|
|
tuner_i2c_xfer_send(&priv->i2c_props,buf,1); |
|
tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); |
|
if (debug) |
|
tuner_dbg("MT20xx hexdump: %*ph\n", 21, buf); |
|
|
|
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(fe); |
|
break; |
|
case MT2050: |
|
mt2050_init(fe); |
|
break; |
|
default: |
|
tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n", |
|
name); |
|
return NULL; |
|
} |
|
|
|
strscpy(fe->ops.tuner_ops.info.name, name, |
|
sizeof(fe->ops.tuner_ops.info.name)); |
|
tuner_info("microtune %s found, OK\n",name); |
|
return fe; |
|
} |
|
|
|
EXPORT_SYMBOL_GPL(microtune_attach); |
|
|
|
MODULE_DESCRIPTION("Microtune tuner driver"); |
|
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer"); |
|
MODULE_LICENSE("GPL");
|
|
|