static int tda18271c2_rf_tracking_filters_correction(struct dvb_frontend *fe,
u32 freq)
{
struct tda18271_priv *priv = fe->tuner_priv;
struct tda18271_rf_tracking_filter_cal *map = priv->rf_cal_state;
unsigned char *regs = priv->tda18271_regs;
int i, ret;
u8 tm_current, dc_over_dt, rf_tab;
s32 rfcal_comp, approx;
/* power up */
ret = tda18271_set_standby_mode(fe, 0, 0, 0);
if (tda_fail(ret))
goto fail;
/* read die current temperature */
tm_current = tda18271_read_thermometer(fe);
/* frequency dependent parameters */
tda18271_calc_rf_cal(fe, &freq);
rf_tab = regs[R_EB14];
i = tda18271_lookup_rf_band(fe, &freq, NULL);
if (tda_fail(i))
return i;
if ((0 == map[i].rf3) || (freq / 1000 < map[i].rf2)) {
approx = map[i].rf_a1 * (s32)(freq / 1000 - map[i].rf1) +
map[i].rf_b1 + rf_tab;
} else {
approx = map[i].rf_a2 * (s32)(freq / 1000 - map[i].rf2) +
map[i].rf_b2 + rf_tab;
}
if (approx < 0)
approx = 0;
if (approx > 255)
approx = 255;
tda18271_lookup_map(fe, RF_CAL_DC_OVER_DT, &freq, &dc_over_dt);
/* calculate temperature compensation */
rfcal_comp = dc_over_dt * (s32)(tm_current - priv->tm_rfcal) / 1000;
regs[R_EB14] = (unsigned char)(approx + rfcal_comp);
ret = tda18271_write_regs(fe, R_EB14, 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;
}
static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
{
struct tda18271_priv *priv = fe->tuner_priv;
struct tda18271_rf_tracking_filter_cal *map = priv->rf_cal_state;
unsigned char *regs = priv->tda18271_regs;
int bcal, rf, i;
s32 divisor, dividend;
#define RF1 0
#define RF2 1
#define RF3 2
u32 rf_default[3];
u32 rf_freq[3];
s32 prog_cal[3];
s32 prog_tab[3];
i = tda18271_lookup_rf_band(fe, &freq, NULL);
if (tda_fail(i))
return i;
rf_default[RF1] = 1000 * map[i].rf1_def;
rf_default[RF2] = 1000 * map[i].rf2_def;
rf_default[RF3] = 1000 * map[i].rf3_def;
for (rf = RF1; rf <= RF3; rf++) {
if (0 == rf_default[rf])
return 0;
tda_cal("freq = %d, rf = %d\n", freq, rf);
/* look for optimized calibration frequency */
bcal = tda18271_powerscan(fe, &rf_default[rf], &rf_freq[rf]);
if (tda_fail(bcal))
return bcal;
tda18271_calc_rf_cal(fe, &rf_freq[rf]);
prog_tab[rf] = (s32)regs[R_EB14];
if (1 == bcal)
prog_cal[rf] =
(s32)tda18271_calibrate_rf(fe, rf_freq[rf]);
else
prog_cal[rf] = prog_tab[rf];
switch (rf) {
case RF1:
map[i].rf_a1 = 0;
map[i].rf_b1 = (prog_cal[RF1] - prog_tab[RF1]);
map[i].rf1 = rf_freq[RF1] / 1000;
break;
case RF2:
dividend = (prog_cal[RF2] - prog_tab[RF2] -
prog_cal[RF1] + prog_tab[RF1]);
divisor = (s32)(rf_freq[RF2] - rf_freq[RF1]) / 1000;
map[i].rf_a1 = (dividend / divisor);
map[i].rf2 = rf_freq[RF2] / 1000;
break;
case RF3:
dividend = (prog_cal[RF3] - prog_tab[RF3] -
prog_cal[RF2] + prog_tab[RF2]);
divisor = (s32)(rf_freq[RF3] - rf_freq[RF2]) / 1000;
map[i].rf_a2 = (dividend / divisor);
map[i].rf_b2 = (prog_cal[RF2] - prog_tab[RF2]);
map[i].rf3 = rf_freq[RF3] / 1000;
break;
default:
BUG();
}
}
return 0;
}
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 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;
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);
regs[R_EP4] |= 0x03;
switch (priv->mode) {
case TDA18271_ANALOG:
N = freq - 1250000;
break;
case TDA18271_DIGITAL:
N = freq + bw / 2;
break;
}
tda18271_calc_cal_pll(fe, N);
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);
tda18271_calc_km(fe, &freq);
tda18271_write_regs(fe, R_EB13, 1);
tda18271_calc_rf_band(fe, &freq);
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);
regs[R_EB20] = 0xec;
tda18271_write_regs(fe, R_EB20, 1);
msleep(60);
regs[R_EP4] &= ~0x03;
tda18271_write_regs(fe, R_EP4, 1);
tda18271_write_regs(fe, R_EP1, 1);
if (0 == tda18271_calc_rf_cal(fe, &freq))
tda18271_write_regs(fe, R_EB14, 1);
return 0;
}
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);
freq += 1000000;
tda18271_calc_main_pll(fe, freq);
tda18271_write_regs(fe, R_MPD, 4);
msleep(5);
regs[R_EP4] &= ~0x03;
regs[R_EP4] |= 0x01;
tda18271_write_regs(fe, R_EP4, 1);
tda18271_write_regs(fe, R_EP2, 1);
ret = tda18271_read_extended(fe);
if (tda_fail(ret))
return ret;
sgn = 1;
*freq_out = *freq_in;
bcal = 0;
count = 0;
wait = false;
while ((regs[R_EB10] & 0x3f) < cid_target) {
freq = *freq_in + (sgn * count) + 1000000;
tda18271_calc_main_pll(fe, freq);
tda18271_write_regs(fe, R_MPD, 4);
if (wait) {
msleep(5);
wait = false;
} else
udelay(100);
tda18271_write_regs(fe, R_EP2, 1);
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;
}
