static int tda18271_calibrate_rf(struct dvb_frontend *fe, u32 freq)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
u32 N;
/* set CAL mode to normal */
regs[R_EP4] &= ~0x03;
tda18271_write_regs(fe, R_EP4, 1);
/* switch off agc1 */
regs[R_EP3] |= 0x40; /* sm_lt = 1 */
regs[R_EB18] |= 0x03; /* set agc1_gain to 15 dB */
tda18271_write_regs(fe, R_EB18, 1);
/* frequency dependent parameters */
tda18271_calc_bp_filter(fe, &freq);
tda18271_calc_gain_taper(fe, &freq);
tda18271_calc_rf_band(fe, &freq);
tda18271_calc_km(fe, &freq);
tda18271_write_regs(fe, R_EP1, 3);
tda18271_write_regs(fe, R_EB13, 1);
/* main pll charge pump source */
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 1);
/* cal pll charge pump source */
tda18271_charge_pump_source(fe, TDA18271_CAL_PLL, 1);
/* force dcdc converter to 0 V */
regs[R_EB14] = 0x00;
tda18271_write_regs(fe, R_EB14, 1);
/* disable plls lock */
regs[R_EB20] &= ~0x20;
tda18271_write_regs(fe, R_EB20, 1);
/* set CAL mode to RF tracking filter calibration */
regs[R_EP4] |= 0x03;
tda18271_write_regs(fe, R_EP4, 2);
/* --------------------------------------------------------------- */
/* set the internal calibration signal */
N = freq;
tda18271_calc_cal_pll(fe, N);
tda18271_write_regs(fe, R_CPD, 4);
/* downconvert internal calibration */
N += 1000000;
tda18271_calc_main_pll(fe, N);
tda18271_write_regs(fe, R_MPD, 4);
msleep(5);
tda18271_write_regs(fe, R_EP2, 1);
tda18271_write_regs(fe, R_EP1, 1);
tda18271_write_regs(fe, R_EP2, 1);
tda18271_write_regs(fe, R_EP1, 1);
/* --------------------------------------------------------------- */
/* normal operation for the main pll */
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 0);
/* normal operation for the cal pll */
tda18271_charge_pump_source(fe, TDA18271_CAL_PLL, 0);
msleep(10); /* plls locking */
/* launch the rf tracking filters calibration */
regs[R_EB20] |= 0x20;
tda18271_write_regs(fe, R_EB20, 1);
msleep(60); /* calibration */
/* --------------------------------------------------------------- */
/* set CAL mode to normal */
regs[R_EP4] &= ~0x03;
/* switch on agc1 */
regs[R_EP3] &= ~0x40; /* sm_lt = 0 */
regs[R_EB18] &= ~0x03; /* set agc1_gain to 6 dB */
tda18271_write_regs(fe, R_EB18, 1);
tda18271_write_regs(fe, R_EP3, 2);
/* synchronization */
tda18271_write_regs(fe, R_EP1, 1);
/* get calibration result */
tda18271_read_extended(fe);
return regs[R_EB14];
}
static int tda18271_powerscan(struct dvb_frontend *fe,
u32 *freq_in, u32 *freq_out)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int sgn, bcal, count, wait, ret;
u8 cid_target;
u16 count_limit;
u32 freq;
freq = *freq_in;
tda18271_calc_rf_band(fe, &freq);
tda18271_calc_rf_cal(fe, &freq);
tda18271_calc_gain_taper(fe, &freq);
tda18271_lookup_cid_target(fe, &freq, &cid_target, &count_limit);
tda18271_write_regs(fe, R_EP2, 1);
tda18271_write_regs(fe, R_EB14, 1);
/* downconvert frequency */
freq += 1000000;
tda18271_calc_main_pll(fe, freq);
tda18271_write_regs(fe, R_MPD, 4);
msleep(5); /* pll locking */
/* detection mode */
regs[R_EP4] &= ~0x03;
regs[R_EP4] |= 0x01;
tda18271_write_regs(fe, R_EP4, 1);
/* launch power detection measurement */
tda18271_write_regs(fe, R_EP2, 1);
/* read power detection info, stored in EB10 */
ret = tda18271_read_extended(fe);
if (tda_fail(ret))
return ret;
/* algorithm initialization */
sgn = 1;
*freq_out = *freq_in;
bcal = 0;
count = 0;
wait = false;
while ((regs[R_EB10] & 0x3f) < cid_target) {
/* downconvert updated freq to 1 MHz */
freq = *freq_in + (sgn * count) + 1000000;
tda18271_calc_main_pll(fe, freq);
tda18271_write_regs(fe, R_MPD, 4);
if (wait) {
msleep(5); /* pll locking */
wait = false;
} else
udelay(100); /* pll locking */
/* launch power detection measurement */
tda18271_write_regs(fe, R_EP2, 1);
/* read power detection info, stored in EB10 */
ret = tda18271_read_extended(fe);
if (tda_fail(ret))
return ret;
count += 200;
if (count <= count_limit)
continue;
if (sgn <= 0)
break;
sgn = -1 * sgn;
count = 200;
wait = true;
}
if ((regs[R_EB10] & 0x3f) >= cid_target) {
bcal = 1;
*freq_out = freq - 1000000;
} else
bcal = 0;
tda_cal("bcal = %d, freq_in = %d, freq_out = %d (freq = %d)\n",
bcal, *freq_in, *freq_out, freq);
return bcal;
}
static int tda18271_channel_configuration(struct dvb_frontend *fe,
struct tda18271_std_map_item *map,
u32 freq, u32 bw)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int ret;
u32 N;
/* update TV broadcast parameters */
/* set standard */
regs[R_EP3] &= ~0x1f; /* clear std bits */
regs[R_EP3] |= (map->agc_mode << 3) | map->std;
if (priv->id == TDA18271HDC2) {
/* set rfagc to high speed mode */
regs[R_EP3] &= ~0x04;
}
/* set cal mode to normal */
regs[R_EP4] &= ~0x03;
/* update IF output level */
regs[R_EP4] &= ~0x1c; /* clear if level bits */
regs[R_EP4] |= (map->if_lvl << 2);
/* update FM_RFn */
regs[R_EP4] &= ~0x80;
regs[R_EP4] |= map->fm_rfn << 7;
/* update rf top / if top */
regs[R_EB22] = 0x00;
regs[R_EB22] |= map->rfagc_top;
ret = tda18271_write_regs(fe, R_EB22, 1);
if (tda_fail(ret))
goto fail;
/* --------------------------------------------------------------- */
/* disable Power Level Indicator */
regs[R_EP1] |= 0x40;
/* make sure thermometer is off */
regs[R_TM] &= ~0x10;
/* frequency dependent parameters */
tda18271_calc_ir_measure(fe, &freq);
tda18271_calc_bp_filter(fe, &freq);
tda18271_calc_rf_band(fe, &freq);
tda18271_calc_gain_taper(fe, &freq);
/* --------------------------------------------------------------- */
/* dual tuner and agc1 extra configuration */
switch (priv->role) {
case TDA18271_MASTER:
regs[R_EB1] |= 0x04; /* main vco */
break;
case TDA18271_SLAVE:
regs[R_EB1] &= ~0x04; /* cal vco */
break;
}
/* agc1 always active */
regs[R_EB1] &= ~0x02;
/* agc1 has priority on agc2 */
regs[R_EB1] &= ~0x01;
ret = tda18271_write_regs(fe, R_EB1, 1);
if (tda_fail(ret))
goto fail;
/* --------------------------------------------------------------- */
N = map->if_freq * 1000 + freq;
switch (priv->role) {
case TDA18271_MASTER:
tda18271_calc_main_pll(fe, N);
tda18271_set_if_notch(fe);
tda18271_write_regs(fe, R_MPD, 4);
break;
case TDA18271_SLAVE:
tda18271_calc_cal_pll(fe, N);
tda18271_write_regs(fe, R_CPD, 4);
regs[R_MPD] = regs[R_CPD] & 0x7f;
tda18271_set_if_notch(fe);
tda18271_write_regs(fe, R_MPD, 1);
break;
}
ret = tda18271_write_regs(fe, R_TM, 7);
if (tda_fail(ret))
goto fail;
/* force charge pump source */
charge_pump_source(fe, 1);
msleep(1);
/* return pll to normal operation */
charge_pump_source(fe, 0);
msleep(20);
if (priv->id == TDA18271HDC2) {
/* set rfagc to normal speed mode */
if (map->fm_rfn)
regs[R_EP3] &= ~0x04;
else
regs[R_EP3] |= 0x04;
ret = tda18271_write_regs(fe, R_EP3, 1);
}
fail:
return ret;
}
static int tda18271c1_rf_tracking_filter_calibration(struct dvb_frontend *fe,
u32 freq, u32 bw)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int ret;
u32 N = 0;
/* calculate bp filter */
tda18271_calc_bp_filter(fe, &freq);
tda18271_write_regs(fe, R_EP1, 1);
regs[R_EB4] &= 0x07;
regs[R_EB4] |= 0x60;
tda18271_write_regs(fe, R_EB4, 1);
regs[R_EB7] = 0x60;
tda18271_write_regs(fe, R_EB7, 1);
regs[R_EB14] = 0x00;
tda18271_write_regs(fe, R_EB14, 1);
regs[R_EB20] = 0xcc;
tda18271_write_regs(fe, R_EB20, 1);
/* set cal mode to RF tracking filter calibration */
regs[R_EP4] |= 0x03;
/* calculate cal pll */
switch (priv->mode) {
case TDA18271_ANALOG:
N = freq - 1250000;
break;
case TDA18271_DIGITAL:
N = freq + bw / 2;
break;
}
tda18271_calc_cal_pll(fe, N);
/* calculate main pll */
switch (priv->mode) {
case TDA18271_ANALOG:
N = freq - 250000;
break;
case TDA18271_DIGITAL:
N = freq + bw / 2 + 1000000;
break;
}
tda18271_calc_main_pll(fe, N);
ret = tda18271_write_regs(fe, R_EP3, 11);
if (tda_fail(ret))
return ret;
msleep(5); /* RF tracking filter calibration initialization */
/* search for K,M,CO for RF calibration */
tda18271_calc_km(fe, &freq);
tda18271_write_regs(fe, R_EB13, 1);
/* search for rf band */
tda18271_calc_rf_band(fe, &freq);
/* search for gain taper */
tda18271_calc_gain_taper(fe, &freq);
tda18271_write_regs(fe, R_EP2, 1);
tda18271_write_regs(fe, R_EP1, 1);
tda18271_write_regs(fe, R_EP2, 1);
tda18271_write_regs(fe, R_EP1, 1);
regs[R_EB4] &= 0x07;
regs[R_EB4] |= 0x40;
tda18271_write_regs(fe, R_EB4, 1);
regs[R_EB7] = 0x40;
tda18271_write_regs(fe, R_EB7, 1);
msleep(10); /* pll locking */
regs[R_EB20] = 0xec;
tda18271_write_regs(fe, R_EB20, 1);
msleep(60); /* RF tracking filter calibration completion */
regs[R_EP4] &= ~0x03; /* set cal mode to normal */
tda18271_write_regs(fe, R_EP4, 1);
tda18271_write_regs(fe, R_EP1, 1);
/* RF tracking filter correction for VHF_Low band */
if (0 == tda18271_calc_rf_cal(fe, &freq))
tda18271_write_regs(fe, R_EB14, 1);
return 0;
}