diff options
Diffstat (limited to 'drivers/media/common/tuners/mt20xx.c')
| -rw-r--r-- | drivers/media/common/tuners/mt20xx.c | 670 |
1 files changed, 670 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/mt20xx.c b/drivers/media/common/tuners/mt20xx.c new file mode 100644 index 00000000000..fbcb2823373 --- /dev/null +++ b/drivers/media/common/tuners/mt20xx.c @@ -0,0 +1,670 @@ +/* + * i2c tv tuner chip device driver + * controls microtune tuners, mt2032 + mt2050 at the moment. + * + * This "mt20xx" module was split apart from the original "tuner" module. + */ +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/videodev.h> +#include "tuner-i2c.h" +#include "mt20xx.h" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "enable verbose debug messages"); + +/* ---------------------------------------------------------------------- */ + +static unsigned int optimize_vco = 1; +module_param(optimize_vco, int, 0644); + +static unsigned int tv_antenna = 1; +module_param(tv_antenna, int, 0644); + +static unsigned int radio_antenna; +module_param(radio_antenna, int, 0644); + +/* ---------------------------------------------------------------------- */ + +#define MT2032 0x04 +#define MT2030 0x06 +#define MT2040 0x07 +#define MT2050 0x42 + +static char *microtune_part[] = { + [ MT2030 ] = "MT2030", + [ MT2032 ] = "MT2032", + [ MT2040 ] = "MT2040", + [ MT2050 ] = "MT2050", +}; + +struct microtune_priv { + struct tuner_i2c_props i2c_props; + + unsigned int xogc; + //unsigned int radio_if2; + + u32 frequency; +}; + +static int microtune_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; + + return 0; +} + +static int microtune_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct microtune_priv *priv = fe->tuner_priv; + *frequency = priv->frequency; + return 0; +} + +// IsSpurInBand()? +static int mt2032_spurcheck(struct dvb_frontend *fe, + int f1, int f2, int spectrum_from,int spectrum_to) +{ + struct microtune_priv *priv = fe->tuner_priv; + int n1=1,n2,f; + + f1=f1/1000; //scale to kHz to avoid 32bit overflows + f2=f2/1000; + spectrum_from/=1000; + spectrum_to/=1000; + + tuner_dbg("spurcheck f1=%d f2=%d from=%d to=%d\n", + f1,f2,spectrum_from,spectrum_to); + + do { + n2=-n1; + f=n1*(f1-f2); + do { + n2--; + f=f-f2; + tuner_dbg("spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f); + + if( (f>spectrum_from) && (f<spectrum_to)) + tuner_dbg("mt2032 spurcheck triggered: %d\n",n1); + } while ( (f>(f2-spectrum_to)) || (n2>-5)); + n1++; + } while (n1<5); + + return 1; +} + +static int mt2032_compute_freq(struct dvb_frontend *fe, + unsigned int rfin, + unsigned int if1, unsigned int if2, + unsigned int spectrum_from, + unsigned int spectrum_to, + unsigned char *buf, + int *ret_sel, + unsigned int xogc) //all in Hz +{ + struct microtune_priv *priv = fe->tuner_priv; + unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1, + desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq; + + fref= 5250 *1000; //5.25MHz + desired_lo1=rfin+if1; + + lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000); + lo1n=lo1/8; + lo1a=lo1-(lo1n*8); + + s=rfin/1000/1000+1090; + + if(optimize_vco) { + if(s>1890) sel=0; + else if(s>1720) sel=1; + else if(s>1530) sel=2; + else if(s>1370) sel=3; + else sel=4; // >1090 + } + else { + if(s>1790) sel=0; // <1958 + else if(s>1617) sel=1; + else if(s>1449) sel=2; + else if(s>1291) sel=3; + else sel=4; // >1090 + } + *ret_sel=sel; + + lo1freq=(lo1a+8*lo1n)*fref; + + tuner_dbg("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n", + rfin,lo1,lo1n,lo1a,sel,lo1freq); + + desired_lo2=lo1freq-rfin-if2; + lo2=(desired_lo2)/fref; + lo2n=lo2/8; + lo2a=lo2-(lo2n*8); + lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith + lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000; + + tuner_dbg("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n", + rfin,lo2,lo2n,lo2a,lo2num,lo2freq); + + if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) { + tuner_info("mt2032: frequency parameters out of range: %d %d %d %d\n", + lo1a, lo1n, lo2a,lo2n); + return(-1); + } + + mt2032_spurcheck(fe, lo1freq, desired_lo2, spectrum_from, spectrum_to); + // should recalculate lo1 (one step up/down) + + // set up MT2032 register map for transfer over i2c + buf[0]=lo1n-1; + buf[1]=lo1a | (sel<<4); + buf[2]=0x86; // LOGC + buf[3]=0x0f; //reserved + buf[4]=0x1f; + buf[5]=(lo2n-1) | (lo2a<<5); + if(rfin >400*1000*1000) + buf[6]=0xe4; + else + buf[6]=0xf4; // set PKEN per rev 1.2 + buf[7]=8+xogc; + buf[8]=0xc3; //reserved + buf[9]=0x4e; //reserved + buf[10]=0xec; //reserved + buf[11]=(lo2num&0xff); + buf[12]=(lo2num>>8) |0x80; // Lo2RST + + return 0; +} + +static int mt2032_check_lo_lock(struct dvb_frontend *fe) +{ + struct microtune_priv *priv = fe->tuner_priv; + int try,lock=0; + unsigned char buf[2]; + + for(try=0;try<10;try++) { + buf[0]=0x0e; + tuner_i2c_xfer_send(&priv->i2c_props,buf,1); + tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); + tuner_dbg("mt2032 Reg.E=0x%02x\n",buf[0]); + lock=buf[0] &0x06; + + if (lock==6) + break; + + tuner_dbg("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]); + udelay(1000); + } + return lock; +} + +static int mt2032_optimize_vco(struct dvb_frontend *fe,int sel,int lock) +{ + struct microtune_priv *priv = fe->tuner_priv; + unsigned char buf[2]; + int tad1; + + buf[0]=0x0f; + tuner_i2c_xfer_send(&priv->i2c_props,buf,1); + tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); + tuner_dbg("mt2032 Reg.F=0x%02x\n",buf[0]); + tad1=buf[0]&0x07; + + if(tad1 ==0) return lock; + if(tad1 ==1) return lock; + + if(tad1==2) { + if(sel==0) + return lock; + else sel--; + } + else { + if(sel<4) + sel++; + else + return lock; + } + + tuner_dbg("mt2032 optimize_vco: sel=%d\n",sel); + + buf[0]=0x0f; + buf[1]=sel; + tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + lock=mt2032_check_lo_lock(fe); + return lock; +} + + +static void mt2032_set_if_freq(struct dvb_frontend *fe, unsigned int rfin, + unsigned int if1, unsigned int if2, + unsigned int from, unsigned int to) +{ + unsigned char buf[21]; + int lint_try,ret,sel,lock=0; + struct microtune_priv *priv = fe->tuner_priv; + + tuner_dbg("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n", + rfin,if1,if2,from,to); + + buf[0]=0; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,1); + tuner_i2c_xfer_recv(&priv->i2c_props,buf,21); + + buf[0]=0; + ret=mt2032_compute_freq(fe,rfin,if1,if2,from,to,&buf[1],&sel,priv->xogc); + if (ret<0) + return; + + // send only the relevant registers per Rev. 1.2 + buf[0]=0; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,4); + buf[5]=5; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,4); + buf[11]=11; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+11,3); + if(ret!=3) + tuner_warn("i2c i/o error: rc == %d (should be 3)\n",ret); + + // wait for PLLs to lock (per manual), retry LINT if not. + for(lint_try=0; lint_try<2; lint_try++) { + lock=mt2032_check_lo_lock(fe); + + if(optimize_vco) + lock=mt2032_optimize_vco(fe,sel,lock); + if(lock==6) break; + + tuner_dbg("mt2032: re-init PLLs by LINT\n"); + buf[0]=7; + buf[1]=0x80 +8+priv->xogc; // set LINT to re-init PLLs + tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + mdelay(10); + buf[1]=8+priv->xogc; + tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + } + + if (lock!=6) + tuner_warn("MT2032 Fatal Error: PLLs didn't lock.\n"); + + buf[0]=2; + buf[1]=0x20; // LOGC for optimal phase noise + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + if (ret!=2) + tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); +} + + +static int mt2032_set_tv_freq(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + int if2,from,to; + + // signal bandwidth and picture carrier + if (params->std & V4L2_STD_525_60) { + // NTSC + from = 40750*1000; + to = 46750*1000; + if2 = 45750*1000; + } else { + // PAL + from = 32900*1000; + to = 39900*1000; + if2 = 38900*1000; + } + + mt2032_set_if_freq(fe, params->frequency*62500, + 1090*1000*1000, if2, from, to); + + return 0; +} + +static int mt2032_set_radio_freq(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + struct microtune_priv *priv = fe->tuner_priv; + int if2; + + if (params->std & V4L2_STD_525_60) { + tuner_dbg("pinnacle ntsc\n"); + if2 = 41300 * 1000; + } else { + tuner_dbg("pinnacle pal\n"); + if2 = 33300 * 1000; + } + + // per Manual for FM tuning: first if center freq. 1085 MHz + mt2032_set_if_freq(fe, params->frequency * 125 / 2, + 1085*1000*1000,if2,if2,if2); + + return 0; +} + +static int mt2032_set_params(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + struct microtune_priv *priv = fe->tuner_priv; + int ret = -EINVAL; + + switch (params->mode) { + case V4L2_TUNER_RADIO: + ret = mt2032_set_radio_freq(fe, params); + priv->frequency = params->frequency * 125 / 2; + break; + case V4L2_TUNER_ANALOG_TV: + case V4L2_TUNER_DIGITAL_TV: + ret = mt2032_set_tv_freq(fe, params); + priv->frequency = params->frequency * 62500; + break; + } + + return ret; +} + +static struct dvb_tuner_ops mt2032_tuner_ops = { + .set_analog_params = mt2032_set_params, + .release = microtune_release, + .get_frequency = microtune_get_frequency, +}; + +// Initialization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001 +static int mt2032_init(struct dvb_frontend *fe) +{ + struct microtune_priv *priv = fe->tuner_priv; + unsigned char buf[21]; + int ret,xogc,xok=0; + + // Initialize Registers per spec. + buf[1]=2; // Index to register 2 + buf[2]=0xff; + buf[3]=0x0f; + buf[4]=0x1f; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+1,4); + + buf[5]=6; // Index register 6 + buf[6]=0xe4; + buf[7]=0x8f; + buf[8]=0xc3; + buf[9]=0x4e; + buf[10]=0xec; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+5,6); + + buf[12]=13; // Index register 13 + buf[13]=0x32; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf+12,2); + + // Adjust XOGC (register 7), wait for XOK + xogc=7; + do { + tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); + mdelay(10); + buf[0]=0x0e; + tuner_i2c_xfer_send(&priv->i2c_props,buf,1); + tuner_i2c_xfer_recv(&priv->i2c_props,buf,1); + xok=buf[0]&0x01; + tuner_dbg("mt2032: xok = 0x%02x\n",xok); + if (xok == 1) break; + + xogc--; + tuner_dbg("mt2032: xogc = 0x%02x\n",xogc&0x07); + if (xogc == 3) { + xogc=4; // min. 4 per spec + break; + } + buf[0]=0x07; + buf[1]=0x88 + xogc; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + if (ret!=2) + tuner_warn("i2c i/o error: rc == %d (should be 2)\n",ret); + } while (xok != 1 ); + priv->xogc=xogc; + + memcpy(&fe->ops.tuner_ops, &mt2032_tuner_ops, sizeof(struct dvb_tuner_ops)); + + return(1); +} + +static void mt2050_set_antenna(struct dvb_frontend *fe, unsigned char antenna) +{ + struct microtune_priv *priv = fe->tuner_priv; + unsigned char buf[2]; + int ret; + + buf[0] = 6; + buf[1] = antenna ? 0x11 : 0x10; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); + tuner_dbg("mt2050: enabled antenna connector %d\n", antenna); +} + +static void mt2050_set_if_freq(struct dvb_frontend *fe,unsigned int freq, unsigned int if2) +{ + struct microtune_priv *priv = fe->tuner_priv; + unsigned int if1=1218*1000*1000; + unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b; + int ret; + unsigned char buf[6]; + + tuner_dbg("mt2050_set_if_freq freq=%d if1=%d if2=%d\n", + freq,if1,if2); + + f_lo1=freq+if1; + f_lo1=(f_lo1/1000000)*1000000; + + f_lo2=f_lo1-freq-if2; + f_lo2=(f_lo2/50000)*50000; + + lo1=f_lo1/4000000; + lo2=f_lo2/4000000; + + f_lo1_modulo= f_lo1-(lo1*4000000); + f_lo2_modulo= f_lo2-(lo2*4000000); + + num1=4*f_lo1_modulo/4000000; + num2=4096*(f_lo2_modulo/1000)/4000; + + // todo spurchecks + + div1a=(lo1/12)-1; + div1b=lo1-(div1a+1)*12; + + div2a=(lo2/8)-1; + div2b=lo2-(div2a+1)*8; + + if (debug > 1) { + tuner_dbg("lo1 lo2 = %d %d\n", lo1, lo2); + tuner_dbg("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n", + num1,num2,div1a,div1b,div2a,div2b); + } + + buf[0]=1; + buf[1]= 4*div1b + num1; + if(freq<275*1000*1000) buf[1] = buf[1]|0x80; + + buf[2]=div1a; + buf[3]=32*div2b + num2/256; + buf[4]=num2-(num2/256)*256; + buf[5]=div2a; + if(num2!=0) buf[5]=buf[5]|0x40; + + if (debug > 1) { + int i; + tuner_dbg("bufs is: "); + for(i=0;i<6;i++) + printk("%x ",buf[i]); + printk("\n"); + } + + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,6); + if (ret!=6) + tuner_warn("i2c i/o error: rc == %d (should be 6)\n",ret); +} + +static int mt2050_set_tv_freq(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + unsigned int if2; + + if (params->std & V4L2_STD_525_60) { + // NTSC + if2 = 45750*1000; + } else { + // PAL + if2 = 38900*1000; + } + if (V4L2_TUNER_DIGITAL_TV == params->mode) { + // DVB (pinnacle 300i) + if2 = 36150*1000; + } + mt2050_set_if_freq(fe, params->frequency*62500, if2); + mt2050_set_antenna(fe, tv_antenna); + + return 0; +} + +static int mt2050_set_radio_freq(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + struct microtune_priv *priv = fe->tuner_priv; + int if2; + + if (params->std & V4L2_STD_525_60) { + tuner_dbg("pinnacle ntsc\n"); + if2 = 41300 * 1000; + } else { + tuner_dbg("pinnacle pal\n"); + if2 = 33300 * 1000; + } + + mt2050_set_if_freq(fe, params->frequency * 125 / 2, if2); + mt2050_set_antenna(fe, radio_antenna); + + return 0; +} + +static int mt2050_set_params(struct dvb_frontend *fe, + struct analog_parameters *params) +{ + struct microtune_priv *priv = fe->tuner_priv; + int ret = -EINVAL; + + switch (params->mode) { + case V4L2_TUNER_RADIO: + ret = mt2050_set_radio_freq(fe, params); + 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 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]; + int ret; + + buf[0]=6; + buf[1]=0x10; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // power + + buf[0]=0x0f; + buf[1]=0x0f; + ret=tuner_i2c_xfer_send(&priv->i2c_props,buf,2); // m1lo + + buf[0]=0x0d; + ret=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) { + 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(fe); + break; + case MT2050: + mt2050_init(fe); + break; + default: + tuner_info("microtune %s found, not (yet?) supported, sorry :-/\n", + name); + return NULL; + } + + strlcpy(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"); + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * --------------------------------------------------------------------------- + * Local variables: + * c-basic-offset: 8 + * End: + */ |