[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / tuners / tda18212.c

/*
 * NXP TDA18212HN silicon tuner driver
 *
 * Copyright (C) 2011 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 "tda18212.h"

struct tda18212_priv {
	struct tda18212_config *cfg;
	struct i2c_adapter *i2c;

	u32 if_frequency;
};

/* write multiple registers */
static int tda18212_wr_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
	int len)
{
	int ret;
	u8 buf[len+1];
	struct i2c_msg msg[1] = {
		{
			.addr = priv->cfg->i2c_address,
			.flags = 0,
			.len = sizeof(buf),
			.buf = buf,
		}
	};

	buf[0] = reg;
	memcpy(&buf[1], val, len);

	ret = i2c_transfer(priv->i2c, msg, 1);
	if (ret == 1) {
		ret = 0;
	} else {
		dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
		ret = -EREMOTEIO;
	}
	return ret;
}

/* read multiple registers */
static int tda18212_rd_regs(struct tda18212_priv *priv, u8 reg, u8 *val,
	int len)
{
	int ret;
	u8 buf[len];
	struct i2c_msg msg[2] = {
		{
			.addr = priv->cfg->i2c_address,
			.flags = 0,
			.len = 1,
			.buf = &reg,
		}, {
			.addr = priv->cfg->i2c_address,
			.flags = I2C_M_RD,
			.len = sizeof(buf),
			.buf = buf,
		}
	};

	ret = i2c_transfer(priv->i2c, msg, 2);
	if (ret == 2) {
		memcpy(val, buf, len);
		ret = 0;
	} else {
		dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
				"len=%d\n", KBUILD_MODNAME, ret, reg, len);
		ret = -EREMOTEIO;
	}

	return ret;
}

/* write single register */
static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
{
	return tda18212_wr_regs(priv, reg, &val, 1);
}

/* read single register */
static int tda18212_rd_reg(struct tda18212_priv *priv, u8 reg, u8 *val)
{
	return tda18212_rd_regs(priv, reg, val, 1);
}

#if 0 /* keep, useful when developing driver */
static void tda18212_dump_regs(struct tda18212_priv *priv)
{
	int i;
	u8 buf[256];

	#define TDA18212_RD_LEN 32
	for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
		tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);

	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
		sizeof(buf), true);

	return;
}
#endif

static int tda18212_set_params(struct dvb_frontend *fe)
{
	struct tda18212_priv *priv = fe->tuner_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, i;
	u32 if_khz;
	u8 buf[9];
	#define DVBT_6   0
	#define DVBT_7   1
	#define DVBT_8   2
	#define DVBT2_6  3
	#define DVBT2_7  4
	#define DVBT2_8  5
	#define DVBC_6   6
	#define DVBC_8   7
	static const u8 bw_params[][3] = {
		     /* reg:   0f    13    23 */
		[DVBT_6]  = { 0xb3, 0x20, 0x03 },
		[DVBT_7]  = { 0xb3, 0x31, 0x01 },
		[DVBT_8]  = { 0xb3, 0x22, 0x01 },
		[DVBT2_6] = { 0xbc, 0x20, 0x03 },
		[DVBT2_7] = { 0xbc, 0x72, 0x03 },
		[DVBT2_8] = { 0xbc, 0x22, 0x01 },
		[DVBC_6]  = { 0x92, 0x50, 0x03 },
		[DVBC_8]  = { 0x92, 0x53, 0x03 },
	};

	dev_dbg(&priv->i2c->dev,
			"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
			__func__, c->delivery_system, c->frequency,
			c->bandwidth_hz);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

	switch (c->delivery_system) {
	case SYS_DVBT:
		switch (c->bandwidth_hz) {
		case 6000000:
			if_khz = priv->cfg->if_dvbt_6;
			i = DVBT_6;
			break;
		case 7000000:
			if_khz = priv->cfg->if_dvbt_7;
			i = DVBT_7;
			break;
		case 8000000:
			if_khz = priv->cfg->if_dvbt_8;
			i = DVBT_8;
			break;
		default:
			ret = -EINVAL;
			goto error;
		}
		break;
	case SYS_DVBT2:
		switch (c->bandwidth_hz) {
		case 6000000:
			if_khz = priv->cfg->if_dvbt2_6;
			i = DVBT2_6;
			break;
		case 7000000:
			if_khz = priv->cfg->if_dvbt2_7;
			i = DVBT2_7;
			break;
		case 8000000:
			if_khz = priv->cfg->if_dvbt2_8;
			i = DVBT2_8;
			break;
		default:
			ret = -EINVAL;
			goto error;
		}
		break;
	case SYS_DVBC_ANNEX_A:
	case SYS_DVBC_ANNEX_C:
		if_khz = priv->cfg->if_dvbc;
		i = DVBC_8;
		break;
	default:
		ret = -EINVAL;
		goto error;
	}

	ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
	if (ret)
		goto error;

	ret = tda18212_wr_reg(priv, 0x06, 0x00);
	if (ret)
		goto error;

	ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
	if (ret)
		goto error;

	buf[0] = 0x02;
	buf[1] = bw_params[i][1];
	buf[2] = 0x03; /* default value */
	buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
	buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
	buf[5] = ((c->frequency / 1000) >>  8) & 0xff;
	buf[6] = ((c->frequency / 1000) >>  0) & 0xff;
	buf[7] = 0xc1;
	buf[8] = 0x01;
	ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
	if (ret)
		goto error;

	/* actual IF rounded as it is on register */
	priv->if_frequency = buf[3] * 50 * 1000;

exit:
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

	return ret;

error:
	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
	goto exit;
}

static int tda18212_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct tda18212_priv *priv = fe->tuner_priv;

	*frequency = priv->if_frequency;

	return 0;
}

static int tda18212_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static const struct dvb_tuner_ops tda18212_tuner_ops = {
	.info = {
		.name           = "NXP TDA18212",

		.frequency_min  =  48000000,
		.frequency_max  = 864000000,
		.frequency_step =      1000,
	},

	.release       = tda18212_release,

	.set_params    = tda18212_set_params,
	.get_if_frequency = tda18212_get_if_frequency,
};

struct dvb_frontend *tda18212_attach(struct dvb_frontend *fe,
	struct i2c_adapter *i2c, struct tda18212_config *cfg)
{
	struct tda18212_priv *priv = NULL;
	int ret;
	u8 val;

	priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->cfg = cfg;
	priv->i2c = i2c;
	fe->tuner_priv = priv;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */

	/* check if the tuner is there */
	ret = tda18212_rd_reg(priv, 0x00, &val);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

	if (!ret)
		dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
	if (ret || val != 0xc7) {
		kfree(priv);
		return NULL;
	}

	dev_info(&priv->i2c->dev,
			"%s: NXP TDA18212HN successfully identified\n",
			KBUILD_MODNAME);

	memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
		sizeof(struct dvb_tuner_ops));

	return fe;
}
EXPORT_SYMBOL(tda18212_attach);

MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
Commit	Line	Data
26eb7045 AP	1	/*
	2	* NXP TDA18212HN silicon tuner driver
	3	*
	4	* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; if not, write to the Free Software Foundation, Inc.,
	18	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	19	*/
	20
2b50763a JP	21	#include "tda18212.h"
	22
	23	struct tda18212_priv {
	24	struct tda18212_config *cfg;
	25	struct i2c_adapter *i2c;
835bf82c AP	26
835bf82c AP	27	u32 if_frequency;
2b50763a JP	28	};
2b50763a JP	29
26eb7045 AP	30	/* write multiple registers */
	31	static int tda18212_wr_regs(struct tda18212_priv priv, u8 reg, u8 val,
	32	int len)
	33	{
	34	int ret;
	35	u8 buf[len+1];
	36	struct i2c_msg msg[1] = {
	37	{
	38	.addr = priv->cfg->i2c_address,
	39	.flags = 0,
	40	.len = sizeof(buf),
	41	.buf = buf,
	42	}
	43	};
	44
	45	buf[0] = reg;
	46	memcpy(&buf[1], val, len);
	47
	48	ret = i2c_transfer(priv->i2c, msg, 1);
	49	if (ret == 1) {
	50	ret = 0;
	51	} else {
d46ddbe4 AP	52	dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
d46ddbe4 AP	53	"len=%d\n", KBUILD_MODNAME, ret, reg, len);
26eb7045 AP	54	ret = -EREMOTEIO;
	55	}
	56	return ret;
	57	}
	58
	59	/* read multiple registers */
	60	static int tda18212_rd_regs(struct tda18212_priv priv, u8 reg, u8 val,
	61	int len)
	62	{
	63	int ret;
	64	u8 buf[len];
	65	struct i2c_msg msg[2] = {
	66	{
	67	.addr = priv->cfg->i2c_address,
	68	.flags = 0,
	69	.len = 1,
	70	.buf = &reg,
	71	}, {
	72	.addr = priv->cfg->i2c_address,
	73	.flags = I2C_M_RD,
	74	.len = sizeof(buf),
	75	.buf = buf,
	76	}
	77	};
	78
	79	ret = i2c_transfer(priv->i2c, msg, 2);
	80	if (ret == 2) {
	81	memcpy(val, buf, len);
	82	ret = 0;
	83	} else {
d46ddbe4 AP	84	dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
d46ddbe4 AP	85	"len=%d\n", KBUILD_MODNAME, ret, reg, len);
26eb7045 AP	86	ret = -EREMOTEIO;
	87	}
	88
	89	return ret;
	90	}
	91
	92	/* write single register */
	93	static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
	94	{
	95	return tda18212_wr_regs(priv, reg, &val, 1);
	96	}
	97
	98	/* read single register */
	99	static int tda18212_rd_reg(struct tda18212_priv priv, u8 reg, u8 val)
	100	{
	101	return tda18212_rd_regs(priv, reg, val, 1);
	102	}
	103
	104	#if 0 /* keep, useful when developing driver */
	105	static void tda18212_dump_regs(struct tda18212_priv *priv)
	106	{
	107	int i;
	108	u8 buf[256];
	109
	110	#define TDA18212_RD_LEN 32
	111	for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
	112	tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);
	113
	114	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
	115	sizeof(buf), true);
	116
	117	return;
	118	}
	119	#endif
	120
14d24d14	121	static int tda18212_set_params(struct dvb_frontend *fe)
26eb7045 AP	122	{
	123	struct tda18212_priv *priv = fe->tuner_priv;
	124	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	125	int ret, i;
	126	u32 if_khz;
	127	u8 buf[9];
b682ad1d AP	128	#define DVBT_6 0
	129	#define DVBT_7 1
	130	#define DVBT_8 2
	131	#define DVBT2_6 3
	132	#define DVBT2_7 4
	133	#define DVBT2_8 5
	134	#define DVBC_6 6
	135	#define DVBC_8 7
26eb7045	136	static const u8 bw_params[][3] = {
b682ad1d AP	137	/* reg: 0f 13 23 */
	138	[DVBT_6] = { 0xb3, 0x20, 0x03 },
	139	[DVBT_7] = { 0xb3, 0x31, 0x01 },
	140	[DVBT_8] = { 0xb3, 0x22, 0x01 },
	141	[DVBT2_6] = { 0xbc, 0x20, 0x03 },
	142	[DVBT2_7] = { 0xbc, 0x72, 0x03 },
	143	[DVBT2_8] = { 0xbc, 0x22, 0x01 },
	144	[DVBC_6] = { 0x92, 0x50, 0x03 },
	145	[DVBC_8] = { 0x92, 0x53, 0x03 },
26eb7045 AP	146	};
26eb7045 AP	147
d46ddbe4 AP	148	dev_dbg(&priv->i2c->dev,
	149	"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
	150	__func__, c->delivery_system, c->frequency,
	151	c->bandwidth_hz);
26eb7045 AP	152
	153	if (fe->ops.i2c_gate_ctrl)
	154	fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
	155
	156	switch (c->delivery_system) {
	157	case SYS_DVBT:
	158	switch (c->bandwidth_hz) {
	159	case 6000000:
	160	if_khz = priv->cfg->if_dvbt_6;
b682ad1d	161	i = DVBT_6;
26eb7045 AP	162	break;
	163	case 7000000:
	164	if_khz = priv->cfg->if_dvbt_7;
b682ad1d	165	i = DVBT_7;
26eb7045 AP	166	break;
	167	case 8000000:
	168	if_khz = priv->cfg->if_dvbt_8;
b682ad1d AP	169	i = DVBT_8;
	170	break;
	171	default:
	172	ret = -EINVAL;
	173	goto error;
	174	}
	175	break;
	176	case SYS_DVBT2:
	177	switch (c->bandwidth_hz) {
	178	case 6000000:
	179	if_khz = priv->cfg->if_dvbt2_6;
	180	i = DVBT2_6;
	181	break;
	182	case 7000000:
	183	if_khz = priv->cfg->if_dvbt2_7;
	184	i = DVBT2_7;
	185	break;
	186	case 8000000:
	187	if_khz = priv->cfg->if_dvbt2_8;
	188	i = DVBT2_8;
26eb7045 AP	189	break;
	190	default:
	191	ret = -EINVAL;
	192	goto error;
	193	}
	194	break;
0349471b MCC	195	case SYS_DVBC_ANNEX_A:
0349471b MCC	196	case SYS_DVBC_ANNEX_C:
26eb7045	197	if_khz = priv->cfg->if_dvbc;
b682ad1d	198	i = DVBC_8;
26eb7045 AP	199	break;
	200	default:
	201	ret = -EINVAL;
	202	goto error;
	203	}
	204
	205	ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
	206	if (ret)
	207	goto error;
	208
	209	ret = tda18212_wr_reg(priv, 0x06, 0x00);
	210	if (ret)
	211	goto error;
	212
	213	ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
	214	if (ret)
	215	goto error;
	216
	217	buf[0] = 0x02;
	218	buf[1] = bw_params[i][1];
	219	buf[2] = 0x03; /* default value */
8cffcc78	220	buf[3] = DIV_ROUND_CLOSEST(if_khz, 50);
26eb7045 AP	221	buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
	222	buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
	223	buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
	224	buf[7] = 0xc1;
	225	buf[8] = 0x01;
	226	ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
	227	if (ret)
	228	goto error;
	229
835bf82c AP	230	/* actual IF rounded as it is on register */
	231	priv->if_frequency = buf[3] * 50 * 1000;
	232
26eb7045 AP	233	exit:
	234	if (fe->ops.i2c_gate_ctrl)
	235	fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
	236
	237	return ret;
	238
	239	error:
d46ddbe4	240	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
26eb7045 AP	241	goto exit;
	242	}
	243
835bf82c AP	244	static int tda18212_get_if_frequency(struct dvb_frontend fe, u32 frequency)
	245	{
	246	struct tda18212_priv *priv = fe->tuner_priv;
	247
	248	*frequency = priv->if_frequency;
	249
	250	return 0;
	251	}
	252
26eb7045 AP	253	static int tda18212_release(struct dvb_frontend *fe)
	254	{
	255	kfree(fe->tuner_priv);
	256	fe->tuner_priv = NULL;
	257	return 0;
	258	}
	259
	260	static const struct dvb_tuner_ops tda18212_tuner_ops = {
	261	.info = {
	262	.name = "NXP TDA18212",
	263
	264	.frequency_min = 48000000,
	265	.frequency_max = 864000000,
	266	.frequency_step = 1000,
	267	},
	268
	269	.release = tda18212_release,
	270
	271	.set_params = tda18212_set_params,
835bf82c	272	.get_if_frequency = tda18212_get_if_frequency,
26eb7045 AP	273	};
	274
	275	struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
	276	struct i2c_adapter i2c, struct tda18212_config cfg)
	277	{
	278	struct tda18212_priv *priv = NULL;
	279	int ret;
ed2e3301	280	u8 val;
26eb7045 AP	281
	282	priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
	283	if (priv == NULL)
	284	return NULL;
	285
	286	priv->cfg = cfg;
	287	priv->i2c = i2c;
	288	fe->tuner_priv = priv;
	289
	290	if (fe->ops.i2c_gate_ctrl)
	291	fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
	292
	293	/* check if the tuner is there */
	294	ret = tda18212_rd_reg(priv, 0x00, &val);
	295
	296	if (fe->ops.i2c_gate_ctrl)
	297	fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
	298
ed2e3301 PB	299	if (!ret)
ed2e3301 PB	300	dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
26eb7045 AP	301	if (ret \|\| val != 0xc7) {
	302	kfree(priv);
	303	return NULL;
	304	}
	305
d46ddbe4 AP	306	dev_info(&priv->i2c->dev,
	307	"%s: NXP TDA18212HN successfully identified\n",
	308	KBUILD_MODNAME);
26eb7045 AP	309
	310	memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
	311	sizeof(struct dvb_tuner_ops));
	312
	313	return fe;
	314	}
	315	EXPORT_SYMBOL(tda18212_attach);
	316
	317	MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
	318	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
	319	MODULE_LICENSE("GPL");