drivers/media/dvb-frontends/cxd2820r_t2.c - linux - Git at Google

 /*
  * Sony CXD2820R demodulator driver
  *
  * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
  *
  *    This program is free software; you can redistribute it and/or modify
  *    it under the terms of the GNU General Public License as published by
  *    the Free Software Foundation; either version 2 of the License, or
  *    (at your option) any later version.
  *
  *    This program is distributed in the hope that it will be useful,
  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *    GNU General Public License for more details.
  *
  *    You should have received a copy of the GNU General Public License along
  *    with this program; if not, write to the Free Software Foundation, Inc.,
  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */


 #include "cxd2820r_priv.h"

 int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct i2c_client *client = priv->client[0];
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 	int ret, bw_i;
 	unsigned int utmp;
 	u32 if_frequency;
 	u8 buf[3], bw_param;
 	u8 bw_params1[][5] = {
 		{ 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
 		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
 		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
 		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
 	};
 	struct reg_val_mask tab[] = {
 		{ 0x00080, 0x02, 0xff },
 		{ 0x00081, 0x20, 0xff },
 		{ 0x00085, 0x07, 0xff },
 		{ 0x00088, 0x01, 0xff },
 		{ 0x02069, 0x01, 0xff },

 		{ 0x0207f, 0x2a, 0xff },
 		{ 0x02082, 0x0a, 0xff },
 		{ 0x02083, 0x0a, 0xff },
 		{ 0x020cb, priv->if_agc_polarity << 6, 0x40 },
 		{ 0x02070, priv->ts_mode, 0xff },
 		{ 0x02071, !priv->ts_clk_inv << 6, 0x40 },
 		{ 0x020b5, priv->spec_inv << 4, 0x10 },
 		{ 0x02567, 0x07, 0x0f },
 		{ 0x02569, 0x03, 0x03 },
 		{ 0x02595, 0x1a, 0xff },
 		{ 0x02596, 0x50, 0xff },
 		{ 0x02a8c, 0x00, 0xff },
 		{ 0x02a8d, 0x34, 0xff },
 		{ 0x02a45, 0x06, 0x07 },
 		{ 0x03f10, 0x0d, 0xff },
 		{ 0x03f11, 0x02, 0xff },
 		{ 0x03f12, 0x01, 0xff },
 		{ 0x03f23, 0x2c, 0xff },
 		{ 0x03f51, 0x13, 0xff },
 		{ 0x03f52, 0x01, 0xff },
 		{ 0x03f53, 0x00, 0xff },
 		{ 0x027e6, 0x14, 0xff },
 		{ 0x02786, 0x02, 0x07 },
 		{ 0x02787, 0x40, 0xe0 },
 		{ 0x027ef, 0x10, 0x18 },
 	};

 	dev_dbg(&client->dev,
 		"delivery_system=%d modulation=%d frequency=%u bandwidth_hz=%u inversion=%d stream_id=%u\n",
 		c->delivery_system, c->modulation, c->frequency,
 		c->bandwidth_hz, c->inversion, c->stream_id);

 	switch (c->bandwidth_hz) {
 	case 5000000:
 		bw_i = 0;
 		bw_param = 3;
 		break;
 	case 6000000:
 		bw_i = 1;
 		bw_param = 2;
 		break;
 	case 7000000:
 		bw_i = 2;
 		bw_param = 1;
 		break;
 	case 8000000:
 		bw_i = 3;
 		bw_param = 0;
 		break;
 	default:
 		return -EINVAL;
 	}

 	/* program tuner */
 	if (fe->ops.tuner_ops.set_params)
 		fe->ops.tuner_ops.set_params(fe);

 	if (priv->delivery_system != SYS_DVBT2) {
 		ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
 		if (ret)
 			goto error;
 	}

 	priv->delivery_system = SYS_DVBT2;

 	/* program IF frequency */
 	if (fe->ops.tuner_ops.get_if_frequency) {
 		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
 		if (ret)
 			goto error;
 		dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
 	} else {
 		ret = -EINVAL;
 		goto error;
 	}

 	utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, CXD2820R_CLK);
 	buf[0] = (utmp >> 16) & 0xff;
 	buf[1] = (utmp >>  8) & 0xff;
 	buf[2] = (utmp >>  0) & 0xff;
 	ret = regmap_bulk_write(priv->regmap[0], 0x20b6, buf, 3);
 	if (ret)
 		goto error;

 	/* PLP filtering */
 	if (c->stream_id > 255) {
 		dev_dbg(&client->dev, "disable PLP filtering\n");
 		ret = regmap_write(priv->regmap[0], 0x23ad, 0x00);
 		if (ret)
 			goto error;
 	} else {
 		dev_dbg(&client->dev, "enable PLP filtering\n");
 		ret = regmap_write(priv->regmap[0], 0x23af, c->stream_id & 0xff);
 		if (ret)
 			goto error;
 		ret = regmap_write(priv->regmap[0], 0x23ad, 0x01);
 		if (ret)
 			goto error;
 	}

 	ret = regmap_bulk_write(priv->regmap[0], 0x209f, bw_params1[bw_i], 5);
 	if (ret)
 		goto error;

 	ret = regmap_update_bits(priv->regmap[0], 0x20d7, 0xc0, bw_param << 6);
 	if (ret)
 		goto error;

 	ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
 	if (ret)
 		goto error;

 	ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
 	if (ret)
 		goto error;

 	return ret;
 error:
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;

 }

 int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
 			     struct dtv_frontend_properties *c)
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct i2c_client *client = priv->client[0];
 	int ret;
 	unsigned int utmp;
 	u8 buf[2];

 	dev_dbg(&client->dev, "\n");

 	ret = regmap_bulk_read(priv->regmap[0], 0x205c, buf, 2);
 	if (ret)
 		goto error;

 	switch ((buf[0] >> 0) & 0x07) {
 	case 0:
 		c->transmission_mode = TRANSMISSION_MODE_2K;
 		break;
 	case 1:
 		c->transmission_mode = TRANSMISSION_MODE_8K;
 		break;
 	case 2:
 		c->transmission_mode = TRANSMISSION_MODE_4K;
 		break;
 	case 3:
 		c->transmission_mode = TRANSMISSION_MODE_1K;
 		break;
 	case 4:
 		c->transmission_mode = TRANSMISSION_MODE_16K;
 		break;
 	case 5:
 		c->transmission_mode = TRANSMISSION_MODE_32K;
 		break;
 	}

 	switch ((buf[1] >> 4) & 0x07) {
 	case 0:
 		c->guard_interval = GUARD_INTERVAL_1_32;
 		break;
 	case 1:
 		c->guard_interval = GUARD_INTERVAL_1_16;
 		break;
 	case 2:
 		c->guard_interval = GUARD_INTERVAL_1_8;
 		break;
 	case 3:
 		c->guard_interval = GUARD_INTERVAL_1_4;
 		break;
 	case 4:
 		c->guard_interval = GUARD_INTERVAL_1_128;
 		break;
 	case 5:
 		c->guard_interval = GUARD_INTERVAL_19_128;
 		break;
 	case 6:
 		c->guard_interval = GUARD_INTERVAL_19_256;
 		break;
 	}

 	ret = regmap_bulk_read(priv->regmap[0], 0x225b, buf, 2);
 	if (ret)
 		goto error;

 	switch ((buf[0] >> 0) & 0x07) {
 	case 0:
 		c->fec_inner = FEC_1_2;
 		break;
 	case 1:
 		c->fec_inner = FEC_3_5;
 		break;
 	case 2:
 		c->fec_inner = FEC_2_3;
 		break;
 	case 3:
 		c->fec_inner = FEC_3_4;
 		break;
 	case 4:
 		c->fec_inner = FEC_4_5;
 		break;
 	case 5:
 		c->fec_inner = FEC_5_6;
 		break;
 	}

 	switch ((buf[1] >> 0) & 0x07) {
 	case 0:
 		c->modulation = QPSK;
 		break;
 	case 1:
 		c->modulation = QAM_16;
 		break;
 	case 2:
 		c->modulation = QAM_64;
 		break;
 	case 3:
 		c->modulation = QAM_256;
 		break;
 	}

 	ret = regmap_read(priv->regmap[0], 0x20b5, &utmp);
 	if (ret)
 		goto error;

 	switch ((utmp >> 4) & 0x01) {
 	case 0:
 		c->inversion = INVERSION_OFF;
 		break;
 	case 1:
 		c->inversion = INVERSION_ON;
 		break;
 	}

 	return ret;
 error:
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;
 }

 int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status)
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 	struct i2c_client *client = priv->client[0];
 	int ret;
 	unsigned int utmp, utmp1, utmp2;
 	u8 buf[4];

 	/* Lock detection */
 	ret = regmap_bulk_read(priv->regmap[0], 0x2010, &buf[0], 1);
 	if (ret)
 		goto error;

 	utmp1 = (buf[0] >> 0) & 0x07;
 	utmp2 = (buf[0] >> 5) & 0x01;

 	if (utmp1 == 6 && utmp2 == 1) {
 		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 			  FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 	} else if (utmp1 == 6 || utmp2 == 1) {
 		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
 			  FE_HAS_VITERBI | FE_HAS_SYNC;
 	} else {
 		*status = 0;
 	}

 	dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
 		*status, 1, buf, utmp1, utmp2);

 	/* Signal strength */
 	if (*status & FE_HAS_SIGNAL) {
 		unsigned int strength;

 		ret = regmap_bulk_read(priv->regmap[0], 0x2026, buf, 2);
 		if (ret)
 			goto error;

 		utmp = buf[0] << 8 | buf[1] << 0;
 		utmp = ~utmp & 0x0fff;
 		/* Scale value to 0x0000-0xffff */
 		strength = utmp << 4 | utmp >> 8;

 		c->strength.len = 1;
 		c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 		c->strength.stat[0].uvalue = strength;
 	} else {
 		c->strength.len = 1;
 		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	}

 	/* CNR */
 	if (*status & FE_HAS_VITERBI) {
 		unsigned int cnr;

 		ret = regmap_bulk_read(priv->regmap[0], 0x2028, buf, 2);
 		if (ret)
 			goto error;

 		utmp = buf[0] << 8 | buf[1] << 0;
 		utmp = utmp & 0x0fff;
 		#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
 		if (utmp)
 			cnr = div_u64((u64)(intlog10(utmp)
 				      - CXD2820R_LOG10_8_24) * 10000,
 				      (1 << 24));
 		else
 			cnr = 0;

 		c->cnr.len = 1;
 		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 		c->cnr.stat[0].svalue = cnr;
 	} else {
 		c->cnr.len = 1;
 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	}

 	/* BER */
 	if (*status & FE_HAS_SYNC) {
 		unsigned int post_bit_error;

 		ret = regmap_bulk_read(priv->regmap[0], 0x2039, buf, 4);
 		if (ret)
 			goto error;

 		if ((buf[0] >> 4) & 0x01) {
 			post_bit_error = buf[0] << 24 | buf[1] << 16 |
 					 buf[2] << 8 | buf[3] << 0;
 			post_bit_error &= 0x0fffffff;
 		} else {
 			post_bit_error = 0;
 		}

 		priv->post_bit_error += post_bit_error;

 		c->post_bit_error.len = 1;
 		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
 	} else {
 		c->post_bit_error.len = 1;
 		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	}

 	return ret;
 error:
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;
 }

 int cxd2820r_sleep_t2(struct dvb_frontend *fe)
 {
 	struct cxd2820r_priv *priv = fe->demodulator_priv;
 	struct i2c_client *client = priv->client[0];
 	int ret;
 	struct reg_val_mask tab[] = {
 		{ 0x000ff, 0x1f, 0xff },
 		{ 0x00085, 0x00, 0xff },
 		{ 0x00088, 0x01, 0xff },
 		{ 0x02069, 0x00, 0xff },
 		{ 0x00081, 0x00, 0xff },
 		{ 0x00080, 0x00, 0xff },
 	};

 	dev_dbg(&client->dev, "\n");

 	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
 	if (ret)
 		goto error;

 	priv->delivery_system = SYS_UNDEFINED;

 	return ret;
 error:
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;
 }

 int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
 	struct dvb_frontend_tune_settings *s)
 {
 	s->min_delay_ms = 1500;
 	s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
 	s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;

 	return 0;
 }
	/*
	* Sony CXD2820R demodulator driver
	*
	* Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/


	#include "cxd2820r_priv.h"

	int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
	{
	struct cxd2820r_priv *priv = fe->demodulator_priv;
	struct i2c_client *client = priv->client[0];
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, bw_i;
	unsigned int utmp;
	u32 if_frequency;
	u8 buf[3], bw_param;
	u8 bw_params1[][5] = {
	{ 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
	{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
	{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
	{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
	};
	struct reg_val_mask tab[] = {
	{ 0x00080, 0x02, 0xff },
	{ 0x00081, 0x20, 0xff },
	{ 0x00085, 0x07, 0xff },
	{ 0x00088, 0x01, 0xff },
	{ 0x02069, 0x01, 0xff },

	{ 0x0207f, 0x2a, 0xff },
	{ 0x02082, 0x0a, 0xff },
	{ 0x02083, 0x0a, 0xff },
	{ 0x020cb, priv->if_agc_polarity << 6, 0x40 },
	{ 0x02070, priv->ts_mode, 0xff },
	{ 0x02071, !priv->ts_clk_inv << 6, 0x40 },
	{ 0x020b5, priv->spec_inv << 4, 0x10 },
	{ 0x02567, 0x07, 0x0f },
	{ 0x02569, 0x03, 0x03 },
	{ 0x02595, 0x1a, 0xff },
	{ 0x02596, 0x50, 0xff },
	{ 0x02a8c, 0x00, 0xff },
	{ 0x02a8d, 0x34, 0xff },
	{ 0x02a45, 0x06, 0x07 },
	{ 0x03f10, 0x0d, 0xff },
	{ 0x03f11, 0x02, 0xff },
	{ 0x03f12, 0x01, 0xff },
	{ 0x03f23, 0x2c, 0xff },
	{ 0x03f51, 0x13, 0xff },
	{ 0x03f52, 0x01, 0xff },
	{ 0x03f53, 0x00, 0xff },
	{ 0x027e6, 0x14, 0xff },
	{ 0x02786, 0x02, 0x07 },
	{ 0x02787, 0x40, 0xe0 },
	{ 0x027ef, 0x10, 0x18 },
	};

	dev_dbg(&client->dev,
	"delivery_system=%d modulation=%d frequency=%u bandwidth_hz=%u inversion=%d stream_id=%u\n",
	c->delivery_system, c->modulation, c->frequency,
	c->bandwidth_hz, c->inversion, c->stream_id);

	switch (c->bandwidth_hz) {
	case 5000000:
	bw_i = 0;
	bw_param = 3;
	break;
	case 6000000:
	bw_i = 1;
	bw_param = 2;
	break;
	case 7000000:
	bw_i = 2;
	bw_param = 1;
	break;
	case 8000000:
	bw_i = 3;
	bw_param = 0;
	break;
	default:
	return -EINVAL;
	}

	/* program tuner */
	if (fe->ops.tuner_ops.set_params)
	fe->ops.tuner_ops.set_params(fe);

	if (priv->delivery_system != SYS_DVBT2) {
	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
	if (ret)
	goto error;
	}

	priv->delivery_system = SYS_DVBT2;

	/* program IF frequency */
	if (fe->ops.tuner_ops.get_if_frequency) {
	ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
	if (ret)
	goto error;
	dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
	} else {
	ret = -EINVAL;
	goto error;
	}

	utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, CXD2820R_CLK);
	buf[0] = (utmp >> 16) & 0xff;
	buf[1] = (utmp >> 8) & 0xff;
	buf[2] = (utmp >> 0) & 0xff;
	ret = regmap_bulk_write(priv->regmap[0], 0x20b6, buf, 3);
	if (ret)
	goto error;

	/* PLP filtering */
	if (c->stream_id > 255) {
	dev_dbg(&client->dev, "disable PLP filtering\n");
	ret = regmap_write(priv->regmap[0], 0x23ad, 0x00);
	if (ret)
	goto error;
	} else {
	dev_dbg(&client->dev, "enable PLP filtering\n");
	ret = regmap_write(priv->regmap[0], 0x23af, c->stream_id & 0xff);
	if (ret)
	goto error;
	ret = regmap_write(priv->regmap[0], 0x23ad, 0x01);
	if (ret)
	goto error;
	}

	ret = regmap_bulk_write(priv->regmap[0], 0x209f, bw_params1[bw_i], 5);
	if (ret)
	goto error;

	ret = regmap_update_bits(priv->regmap[0], 0x20d7, 0xc0, bw_param << 6);
	if (ret)
	goto error;

	ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
	if (ret)
	goto error;

	ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
	if (ret)
	goto error;

	return ret;
	error:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;

	}

	int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
	struct dtv_frontend_properties *c)
	{
	struct cxd2820r_priv *priv = fe->demodulator_priv;
	struct i2c_client *client = priv->client[0];
	int ret;
	unsigned int utmp;
	u8 buf[2];

	dev_dbg(&client->dev, "\n");

	ret = regmap_bulk_read(priv->regmap[0], 0x205c, buf, 2);
	if (ret)
	goto error;

	switch ((buf[0] >> 0) & 0x07) {
	case 0:
	c->transmission_mode = TRANSMISSION_MODE_2K;
	break;
	case 1:
	c->transmission_mode = TRANSMISSION_MODE_8K;
	break;
	case 2:
	c->transmission_mode = TRANSMISSION_MODE_4K;
	break;
	case 3:
	c->transmission_mode = TRANSMISSION_MODE_1K;
	break;
	case 4:
	c->transmission_mode = TRANSMISSION_MODE_16K;
	break;
	case 5:
	c->transmission_mode = TRANSMISSION_MODE_32K;
	break;
	}

	switch ((buf[1] >> 4) & 0x07) {
	case 0:
	c->guard_interval = GUARD_INTERVAL_1_32;
	break;
	case 1:
	c->guard_interval = GUARD_INTERVAL_1_16;
	break;
	case 2:
	c->guard_interval = GUARD_INTERVAL_1_8;
	break;
	case 3:
	c->guard_interval = GUARD_INTERVAL_1_4;
	break;
	case 4:
	c->guard_interval = GUARD_INTERVAL_1_128;
	break;
	case 5:
	c->guard_interval = GUARD_INTERVAL_19_128;
	break;
	case 6:
	c->guard_interval = GUARD_INTERVAL_19_256;
	break;
	}

	ret = regmap_bulk_read(priv->regmap[0], 0x225b, buf, 2);
	if (ret)
	goto error;

	switch ((buf[0] >> 0) & 0x07) {
	case 0:
	c->fec_inner = FEC_1_2;
	break;
	case 1:
	c->fec_inner = FEC_3_5;
	break;
	case 2:
	c->fec_inner = FEC_2_3;
	break;
	case 3:
	c->fec_inner = FEC_3_4;
	break;
	case 4:
	c->fec_inner = FEC_4_5;
	break;
	case 5:
	c->fec_inner = FEC_5_6;
	break;
	}

	switch ((buf[1] >> 0) & 0x07) {
	case 0:
	c->modulation = QPSK;
	break;
	case 1:
	c->modulation = QAM_16;
	break;
	case 2:
	c->modulation = QAM_64;
	break;
	case 3:
	c->modulation = QAM_256;
	break;
	}

	ret = regmap_read(priv->regmap[0], 0x20b5, &utmp);
	if (ret)
	goto error;

	switch ((utmp >> 4) & 0x01) {
	case 0:
	c->inversion = INVERSION_OFF;
	break;
	case 1:
	c->inversion = INVERSION_ON;
	break;
	}

	return ret;
	error:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
	}

	int cxd2820r_read_status_t2(struct dvb_frontend fe, enum fe_status status)
	{
	struct cxd2820r_priv *priv = fe->demodulator_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct i2c_client *client = priv->client[0];
	int ret;
	unsigned int utmp, utmp1, utmp2;
	u8 buf[4];

	/* Lock detection */
	ret = regmap_bulk_read(priv->regmap[0], 0x2010, &buf[0], 1);
	if (ret)
	goto error;

	utmp1 = (buf[0] >> 0) & 0x07;
	utmp2 = (buf[0] >> 5) & 0x01;

	if (utmp1 == 6 && utmp2 == 1) {
	*status = FE_HAS_SIGNAL \| FE_HAS_CARRIER \|
	FE_HAS_VITERBI \| FE_HAS_SYNC \| FE_HAS_LOCK;
	} else if (utmp1 == 6 \|\| utmp2 == 1) {
	*status = FE_HAS_SIGNAL \| FE_HAS_CARRIER \|
	FE_HAS_VITERBI \| FE_HAS_SYNC;
	} else {
	*status = 0;
	}

	dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
	*status, 1, buf, utmp1, utmp2);

	/* Signal strength */
	if (*status & FE_HAS_SIGNAL) {
	unsigned int strength;

	ret = regmap_bulk_read(priv->regmap[0], 0x2026, buf, 2);
	if (ret)
	goto error;

	utmp = buf[0] << 8 \| buf[1] << 0;
	utmp = ~utmp & 0x0fff;
	/* Scale value to 0x0000-0xffff */
	strength = utmp << 4 \| utmp >> 8;

	c->strength.len = 1;
	c->strength.stat[0].scale = FE_SCALE_RELATIVE;
	c->strength.stat[0].uvalue = strength;
	} else {
	c->strength.len = 1;
	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	}

	/* CNR */
	if (*status & FE_HAS_VITERBI) {
	unsigned int cnr;

	ret = regmap_bulk_read(priv->regmap[0], 0x2028, buf, 2);
	if (ret)
	goto error;

	utmp = buf[0] << 8 \| buf[1] << 0;
	utmp = utmp & 0x0fff;
	#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
	if (utmp)
	cnr = div_u64((u64)(intlog10(utmp)
	- CXD2820R_LOG10_8_24) * 10000,
	(1 << 24));
	else
	cnr = 0;

	c->cnr.len = 1;
	c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
	c->cnr.stat[0].svalue = cnr;
	} else {
	c->cnr.len = 1;
	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	}

	/* BER */
	if (*status & FE_HAS_SYNC) {
	unsigned int post_bit_error;

	ret = regmap_bulk_read(priv->regmap[0], 0x2039, buf, 4);
	if (ret)
	goto error;

	if ((buf[0] >> 4) & 0x01) {
	post_bit_error = buf[0] << 24 \| buf[1] << 16 \|
	buf[2] << 8 \| buf[3] << 0;
	post_bit_error &= 0x0fffffff;
	} else {
	post_bit_error = 0;
	}

	priv->post_bit_error += post_bit_error;

	c->post_bit_error.len = 1;
	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
	c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
	} else {
	c->post_bit_error.len = 1;
	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	}

	return ret;
	error:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
	}

	int cxd2820r_sleep_t2(struct dvb_frontend *fe)
	{
	struct cxd2820r_priv *priv = fe->demodulator_priv;
	struct i2c_client *client = priv->client[0];
	int ret;
	struct reg_val_mask tab[] = {
	{ 0x000ff, 0x1f, 0xff },
	{ 0x00085, 0x00, 0xff },
	{ 0x00088, 0x01, 0xff },
	{ 0x02069, 0x00, 0xff },
	{ 0x00081, 0x00, 0xff },
	{ 0x00080, 0x00, 0xff },
	};

	dev_dbg(&client->dev, "\n");

	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
	if (ret)
	goto error;

	priv->delivery_system = SYS_UNDEFINED;

	return ret;
	error:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
	}

	int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
	struct dvb_frontend_tune_settings *s)
	{
	s->min_delay_ms = 1500;
	s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
	s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;

	return 0;
	}