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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Sony CXD2820R demodulator driver4 *5 * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>6 */7 8 9#include "cxd2820r_priv.h"10 11int cxd2820r_set_frontend_t(struct dvb_frontend *fe)12{13	struct cxd2820r_priv *priv = fe->demodulator_priv;14	struct i2c_client *client = priv->client[0];15	struct dtv_frontend_properties *c = &fe->dtv_property_cache;16	int ret, bw_i;17	unsigned int utmp;18	u32 if_frequency;19	u8 buf[3], bw_param;20	u8 bw_params1[][5] = {21		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */22		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */23		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */24	};25	u8 bw_params2[][2] = {26		{ 0x1f, 0xdc }, /* 6 MHz */27		{ 0x12, 0xf8 }, /* 7 MHz */28		{ 0x01, 0xe0 }, /* 8 MHz */29	};30	struct reg_val_mask tab[] = {31		{ 0x00080, 0x00, 0xff },32		{ 0x00081, 0x03, 0xff },33		{ 0x00085, 0x07, 0xff },34		{ 0x00088, 0x01, 0xff },35 36		{ 0x00070, priv->ts_mode, 0xff },37		{ 0x00071, !priv->ts_clk_inv << 4, 0x10 },38		{ 0x000cb, priv->if_agc_polarity << 6, 0x40 },39		{ 0x000a5, 0x00, 0x01 },40		{ 0x00082, 0x20, 0x60 },41		{ 0x000c2, 0xc3, 0xff },42		{ 0x0016a, 0x50, 0xff },43		{ 0x00427, 0x41, 0xff },44	};45 46	dev_dbg(&client->dev,47		"delivery_system=%d modulation=%d frequency=%u bandwidth_hz=%u inversion=%d\n",48		c->delivery_system, c->modulation, c->frequency,49		c->bandwidth_hz, c->inversion);50 51	switch (c->bandwidth_hz) {52	case 6000000:53		bw_i = 0;54		bw_param = 2;55		break;56	case 7000000:57		bw_i = 1;58		bw_param = 1;59		break;60	case 8000000:61		bw_i = 2;62		bw_param = 0;63		break;64	default:65		return -EINVAL;66	}67 68	/* program tuner */69	if (fe->ops.tuner_ops.set_params)70		fe->ops.tuner_ops.set_params(fe);71 72	if (priv->delivery_system != SYS_DVBT) {73		ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));74		if (ret)75			goto error;76	}77 78	priv->delivery_system = SYS_DVBT;79	priv->ber_running = false; /* tune stops BER counter */80 81	/* program IF frequency */82	if (fe->ops.tuner_ops.get_if_frequency) {83		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);84		if (ret)85			goto error;86		dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);87	} else {88		ret = -EINVAL;89		goto error;90	}91 92	utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, CXD2820R_CLK);93	buf[0] = (utmp >> 16) & 0xff;94	buf[1] = (utmp >>  8) & 0xff;95	buf[2] = (utmp >>  0) & 0xff;96	ret = regmap_bulk_write(priv->regmap[0], 0x00b6, buf, 3);97	if (ret)98		goto error;99 100	ret = regmap_bulk_write(priv->regmap[0], 0x009f, bw_params1[bw_i], 5);101	if (ret)102		goto error;103 104	ret = regmap_update_bits(priv->regmap[0], 0x00d7, 0xc0, bw_param << 6);105	if (ret)106		goto error;107 108	ret = regmap_bulk_write(priv->regmap[0], 0x00d9, bw_params2[bw_i], 2);109	if (ret)110		goto error;111 112	ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);113	if (ret)114		goto error;115 116	ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);117	if (ret)118		goto error;119 120	return ret;121error:122	dev_dbg(&client->dev, "failed=%d\n", ret);123	return ret;124}125 126int cxd2820r_get_frontend_t(struct dvb_frontend *fe,127			    struct dtv_frontend_properties *c)128{129	struct cxd2820r_priv *priv = fe->demodulator_priv;130	struct i2c_client *client = priv->client[0];131	int ret;132	unsigned int utmp;133	u8 buf[2];134 135	dev_dbg(&client->dev, "\n");136 137	ret = regmap_bulk_read(priv->regmap[0], 0x002f, buf, sizeof(buf));138	if (ret)139		goto error;140 141	switch ((buf[0] >> 6) & 0x03) {142	case 0:143		c->modulation = QPSK;144		break;145	case 1:146		c->modulation = QAM_16;147		break;148	case 2:149		c->modulation = QAM_64;150		break;151	}152 153	switch ((buf[1] >> 1) & 0x03) {154	case 0:155		c->transmission_mode = TRANSMISSION_MODE_2K;156		break;157	case 1:158		c->transmission_mode = TRANSMISSION_MODE_8K;159		break;160	}161 162	switch ((buf[1] >> 3) & 0x03) {163	case 0:164		c->guard_interval = GUARD_INTERVAL_1_32;165		break;166	case 1:167		c->guard_interval = GUARD_INTERVAL_1_16;168		break;169	case 2:170		c->guard_interval = GUARD_INTERVAL_1_8;171		break;172	case 3:173		c->guard_interval = GUARD_INTERVAL_1_4;174		break;175	}176 177	switch ((buf[0] >> 3) & 0x07) {178	case 0:179		c->hierarchy = HIERARCHY_NONE;180		break;181	case 1:182		c->hierarchy = HIERARCHY_1;183		break;184	case 2:185		c->hierarchy = HIERARCHY_2;186		break;187	case 3:188		c->hierarchy = HIERARCHY_4;189		break;190	}191 192	switch ((buf[0] >> 0) & 0x07) {193	case 0:194		c->code_rate_HP = FEC_1_2;195		break;196	case 1:197		c->code_rate_HP = FEC_2_3;198		break;199	case 2:200		c->code_rate_HP = FEC_3_4;201		break;202	case 3:203		c->code_rate_HP = FEC_5_6;204		break;205	case 4:206		c->code_rate_HP = FEC_7_8;207		break;208	}209 210	switch ((buf[1] >> 5) & 0x07) {211	case 0:212		c->code_rate_LP = FEC_1_2;213		break;214	case 1:215		c->code_rate_LP = FEC_2_3;216		break;217	case 2:218		c->code_rate_LP = FEC_3_4;219		break;220	case 3:221		c->code_rate_LP = FEC_5_6;222		break;223	case 4:224		c->code_rate_LP = FEC_7_8;225		break;226	}227 228	ret = regmap_read(priv->regmap[0], 0x07c6, &utmp);229	if (ret)230		goto error;231 232	switch ((utmp >> 0) & 0x01) {233	case 0:234		c->inversion = INVERSION_OFF;235		break;236	case 1:237		c->inversion = INVERSION_ON;238		break;239	}240 241	return ret;242error:243	dev_dbg(&client->dev, "failed=%d\n", ret);244	return ret;245}246 247int cxd2820r_read_status_t(struct dvb_frontend *fe, enum fe_status *status)248{249	struct cxd2820r_priv *priv = fe->demodulator_priv;250	struct i2c_client *client = priv->client[0];251	struct dtv_frontend_properties *c = &fe->dtv_property_cache;252	int ret;253	unsigned int utmp, utmp1, utmp2;254	u8 buf[3];255 256	/* Lock detection */257	ret = regmap_bulk_read(priv->regmap[0], 0x0010, &buf[0], 1);258	if (ret)259		goto error;260	ret = regmap_bulk_read(priv->regmap[0], 0x0073, &buf[1], 1);261	if (ret)262		goto error;263 264	utmp1 = (buf[0] >> 0) & 0x07;265	utmp2 = (buf[1] >> 3) & 0x01;266 267	if (utmp1 == 6 && utmp2 == 1) {268		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |269			  FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;270	} else if (utmp1 == 6 || utmp2 == 1) {271		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |272			  FE_HAS_VITERBI | FE_HAS_SYNC;273	} else {274		*status = 0;275	}276 277	dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",278		*status, 2, buf, utmp1, utmp2);279 280	/* Signal strength */281	if (*status & FE_HAS_SIGNAL) {282		unsigned int strength;283 284		ret = regmap_bulk_read(priv->regmap[0], 0x0026, buf, 2);285		if (ret)286			goto error;287 288		utmp = buf[0] << 8 | buf[1] << 0;289		utmp = ~utmp & 0x0fff;290		/* Scale value to 0x0000-0xffff */291		strength = utmp << 4 | utmp >> 8;292 293		c->strength.len = 1;294		c->strength.stat[0].scale = FE_SCALE_RELATIVE;295		c->strength.stat[0].uvalue = strength;296	} else {297		c->strength.len = 1;298		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;299	}300 301	/* CNR */302	if (*status & FE_HAS_VITERBI) {303		unsigned int cnr;304 305		ret = regmap_bulk_read(priv->regmap[0], 0x002c, buf, 2);306		if (ret)307			goto error;308 309		utmp = buf[0] << 8 | buf[1] << 0;310		if (utmp)311			cnr = div_u64((u64)(intlog10(utmp)312				      - intlog10(32000 - utmp) + 55532585)313				      * 10000, (1 << 24));314		else315			cnr = 0;316 317		c->cnr.len = 1;318		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;319		c->cnr.stat[0].svalue = cnr;320	} else {321		c->cnr.len = 1;322		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;323	}324 325	/* BER */326	if (*status & FE_HAS_SYNC) {327		unsigned int post_bit_error;328		bool start_ber;329 330		if (priv->ber_running) {331			ret = regmap_bulk_read(priv->regmap[0], 0x0076, buf, 3);332			if (ret)333				goto error;334 335			if ((buf[2] >> 7) & 0x01) {336				post_bit_error = buf[2] << 16 | buf[1] << 8 |337						 buf[0] << 0;338				post_bit_error &= 0x0fffff;339				start_ber = true;340			} else {341				post_bit_error = 0;342				start_ber = false;343			}344		} else {345			post_bit_error = 0;346			start_ber = true;347		}348 349		if (start_ber) {350			ret = regmap_write(priv->regmap[0], 0x0079, 0x01);351			if (ret)352				goto error;353			priv->ber_running = true;354		}355 356		priv->post_bit_error += post_bit_error;357 358		c->post_bit_error.len = 1;359		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;360		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;361	} else {362		c->post_bit_error.len = 1;363		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;364	}365 366	return ret;367error:368	dev_dbg(&client->dev, "failed=%d\n", ret);369	return ret;370}371 372int cxd2820r_init_t(struct dvb_frontend *fe)373{374	struct cxd2820r_priv *priv = fe->demodulator_priv;375	struct i2c_client *client = priv->client[0];376	int ret;377 378	dev_dbg(&client->dev, "\n");379 380	ret = regmap_write(priv->regmap[0], 0x0085, 0x07);381	if (ret)382		goto error;383 384	return ret;385error:386	dev_dbg(&client->dev, "failed=%d\n", ret);387	return ret;388}389 390int cxd2820r_sleep_t(struct dvb_frontend *fe)391{392	struct cxd2820r_priv *priv = fe->demodulator_priv;393	struct i2c_client *client = priv->client[0];394	int ret;395	static struct reg_val_mask tab[] = {396		{ 0x000ff, 0x1f, 0xff },397		{ 0x00085, 0x00, 0xff },398		{ 0x00088, 0x01, 0xff },399		{ 0x00081, 0x00, 0xff },400		{ 0x00080, 0x00, 0xff },401	};402 403	dev_dbg(&client->dev, "\n");404 405	priv->delivery_system = SYS_UNDEFINED;406 407	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));408	if (ret)409		goto error;410 411	return ret;412error:413	dev_dbg(&client->dev, "failed=%d\n", ret);414	return ret;415}416 417int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,418	struct dvb_frontend_tune_settings *s)419{420	s->min_delay_ms = 500;421	s->step_size = fe->ops.info.frequency_stepsize_hz * 2;422	s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;423 424	return 0;425}426