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;
}
/*
* set the frequency of the tuner
* If 'type' is TV_FREQUENCY, the frequency is freq MHz*16
* If 'type' is FM_RADIO_FREQUENCY, the frequency is freq MHz * 100
* (note *16 gives is 4 bits of fraction, eg steps of nnn.0625)
*
*/
int
tv_freq( bktr_ptr_t bktr, int frequency, int type )
{
const struct TUNER* tuner;
u_char addr;
u_char control;
u_char band;
int N;
int band_select = 0;
#if defined( TEST_TUNER_AFC )
int oldFrequency, afcDelta;
#endif
tuner = bktr->card.tuner;
if ( tuner == NULL )
return( -1 );
if (tuner == &tuners[TUNER_MT2032]) {
mt2032_set_tv_freq(bktr, frequency);
return 0;
}
if (type == TV_FREQUENCY) {
/*
* select the band based on frequency
* XXX FIXME: get the cross-over points from the tuner struct
*/
if ( frequency < (160 * FREQFACTOR ) )
band_select = LOW_BAND;
else if ( frequency < (454 * FREQFACTOR ) )
band_select = MID_BAND;
else
band_select = HIGH_BAND;
#if defined( TEST_TUNER_AFC )
if ( bktr->tuner.afc )
frequency -= 4;
#endif
/*
* N = 16 * { fRF(pc) + fIF(pc) }
* or N = 16* fRF(pc) + 16*fIF(pc) }
* where:
* pc is picture carrier, fRF & fIF are in MHz
*
* fortunatly, frequency is passed in as MHz * 16
* and the TBL_IF frequency is also stored in MHz * 16
*/
N = frequency + TBL_IF;
/* set the address of the PLL */
addr = bktr->card.tuner_pllAddr;
control = tuner->pllControl[ band_select ];
band = tuner->bandAddrs[ band_select ];
if(!(band && control)) /* Don't try to set un- */
return(-1); /* supported modes. */
if ( frequency > bktr->tuner.frequency ) {
i2cWrite( bktr, addr, (N>>8) & 0x7f, N & 0xff );
i2cWrite( bktr, addr, control, band );
}
else {
