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_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;
}
