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;
}
Пример #4
0
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;
}