[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / common / 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_priv.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

/* 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 {
		warn("i2c wr failed ret:%d reg:%02x len:%d", 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 {
		warn("i2c rd failed ret:%d reg:%02x len:%d", 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 dvb_frontend_parameters *p)
{
	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];
	static const u8 bw_params[][3] = {
		/*  0f    13    23 */
		{ 0xb3, 0x20, 0x03 }, /* DVB-T 6 MHz */
		{ 0xb3, 0x31, 0x01 }, /* DVB-T 7 MHz */
		{ 0xb3, 0x22, 0x01 }, /* DVB-T 8 MHz */
		{ 0x92, 0x53, 0x03 }, /* DVB-C */
	};

	dbg("%s: delsys=%d RF=%d BW=%d", __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 = 0;
			break;
		case 7000000:
			if_khz = priv->cfg->if_dvbt_7;
			i = 1;
			break;
		case 8000000:
			if_khz = priv->cfg->if_dvbt_8;
			i = 2;
			break;
		default:
			ret = -EINVAL;
			goto error;
		}
		break;
	case SYS_DVBC_ANNEX_AC:
		if_khz = priv->cfg->if_dvbc;
		i = 3;
		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] = 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;

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

	return ret;

error:
	dbg("%s: failed:%d", __func__, ret);
	goto exit;
}

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,
};

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 */

	dbg("%s: ret:%d chip ID:%02x", __func__, ret, val);
	if (ret || val != 0xc7) {
		kfree(priv);
		return NULL;
	}

	info("NXP TDA18212HN successfully identified.");

	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
	21	#include "tda18212_priv.h"
	22
	23	static int debug;
	24	module_param(debug, int, 0644);
	25	MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
	26
	27	/* write multiple registers */
	28	static int tda18212_wr_regs(struct tda18212_priv priv, u8 reg, u8 val,
	29	int len)
	30	{
	31	int ret;
	32	u8 buf[len+1];
	33	struct i2c_msg msg[1] = {
	34	{
	35	.addr = priv->cfg->i2c_address,
	36	.flags = 0,
	37	.len = sizeof(buf),
	38	.buf = buf,
	39	}
	40	};
	41
	42	buf[0] = reg;
	43	memcpy(&buf[1], val, len);
	44
	45	ret = i2c_transfer(priv->i2c, msg, 1);
	46	if (ret == 1) {
	47	ret = 0;
	48	} else {
	49	warn("i2c wr failed ret:%d reg:%02x len:%d", ret, reg, len);
	50	ret = -EREMOTEIO;
	51	}
	52	return ret;
	53	}
	54
	55	/* read multiple registers */
	56	static int tda18212_rd_regs(struct tda18212_priv priv, u8 reg, u8 val,
	57	int len)
	58	{
	59	int ret;
	60	u8 buf[len];
	61	struct i2c_msg msg[2] = {
	62	{
	63	.addr = priv->cfg->i2c_address,
	64	.flags = 0,
65	.len = 1,
66	.buf = &reg,
67	}, {
68	.addr = priv->cfg->i2c_address,
69	.flags = I2C_M_RD,
70	.len = sizeof(buf),
71	.buf = buf,
72	}
73	};
74
75	ret = i2c_transfer(priv->i2c, msg, 2);
76	if (ret == 2) {
77	memcpy(val, buf, len);
78	ret = 0;
79	} else {
80	warn("i2c rd failed ret:%d reg:%02x len:%d", ret, reg, len);
81	ret = -EREMOTEIO;
82	}
83
84	return ret;
85	}
86
87	/* write single register */
88	static int tda18212_wr_reg(struct tda18212_priv *priv, u8 reg, u8 val)
89	{
90	return tda18212_wr_regs(priv, reg, &val, 1);
91	}
92
93	/* read single register */
94	static int tda18212_rd_reg(struct tda18212_priv priv, u8 reg, u8 val)
95	{
96	return tda18212_rd_regs(priv, reg, val, 1);
97	}
98
99	#if 0 /* keep, useful when developing driver */
100	static void tda18212_dump_regs(struct tda18212_priv *priv)
101	{
102	int i;
103	u8 buf[256];
104
105	#define TDA18212_RD_LEN 32
106	for (i = 0; i < sizeof(buf); i += TDA18212_RD_LEN)
107	tda18212_rd_regs(priv, i, &buf[i], TDA18212_RD_LEN);
108
109	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 32, 1, buf,
110	sizeof(buf), true);
111
112	return;
113	}
114	#endif
115
116	static int tda18212_set_params(struct dvb_frontend *fe,
117	struct dvb_frontend_parameters *p)
118	{
119	struct tda18212_priv *priv = fe->tuner_priv;
120	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
121	int ret, i;
122	u32 if_khz;
123	u8 buf[9];
124	static const u8 bw_params[][3] = {
125	/* 0f 13 23 */
126	{ 0xb3, 0x20, 0x03 }, /* DVB-T 6 MHz */
127	{ 0xb3, 0x31, 0x01 }, /* DVB-T 7 MHz */
128	{ 0xb3, 0x22, 0x01 }, /* DVB-T 8 MHz */
129	{ 0x92, 0x53, 0x03 }, /* DVB-C */
130	};
131
132	dbg("%s: delsys=%d RF=%d BW=%d", __func__,
133	c->delivery_system, c->frequency, c->bandwidth_hz);
134
135	if (fe->ops.i2c_gate_ctrl)
136	fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
137
138	switch (c->delivery_system) {
139	case SYS_DVBT:
140	switch (c->bandwidth_hz) {
141	case 6000000:
142	if_khz = priv->cfg->if_dvbt_6;
143	i = 0;
144	break;
145	case 7000000:
146	if_khz = priv->cfg->if_dvbt_7;
147	i = 1;
148	break;
149	case 8000000:
150	if_khz = priv->cfg->if_dvbt_8;
151	i = 2;
152	break;
153	default:
154	ret = -EINVAL;
155	goto error;
156	}
157	break;
158	case SYS_DVBC_ANNEX_AC:
159	if_khz = priv->cfg->if_dvbc;
160	i = 3;
161	break;
162	default:
163	ret = -EINVAL;
164	goto error;
165	}
166
167	ret = tda18212_wr_reg(priv, 0x23, bw_params[i][2]);
168	if (ret)
169	goto error;
170
171	ret = tda18212_wr_reg(priv, 0x06, 0x00);
172	if (ret)
173	goto error;
174
175	ret = tda18212_wr_reg(priv, 0x0f, bw_params[i][0]);
176	if (ret)
177	goto error;
178
179	buf[0] = 0x02;
180	buf[1] = bw_params[i][1];
181	buf[2] = 0x03; /* default value */
182	buf[3] = if_khz / 50;
183	buf[4] = ((c->frequency / 1000) >> 16) & 0xff;
184	buf[5] = ((c->frequency / 1000) >> 8) & 0xff;
185	buf[6] = ((c->frequency / 1000) >> 0) & 0xff;
186	buf[7] = 0xc1;
187	buf[8] = 0x01;
188	ret = tda18212_wr_regs(priv, 0x12, buf, sizeof(buf));
189	if (ret)
190	goto error;
191
192	exit:
193	if (fe->ops.i2c_gate_ctrl)
194	fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
195
196	return ret;
197
198	error:
199	dbg("%s: failed:%d", __func__, ret);
200	goto exit;
201	}
202
203	static int tda18212_release(struct dvb_frontend *fe)
204	{
205	kfree(fe->tuner_priv);
206	fe->tuner_priv = NULL;
207	return 0;
208	}
209
210	static const struct dvb_tuner_ops tda18212_tuner_ops = {
211	.info = {
212	.name = "NXP TDA18212",
213
214	.frequency_min = 48000000,
215	.frequency_max = 864000000,
216	.frequency_step = 1000,
217	},
218
219	.release = tda18212_release,
220
221	.set_params = tda18212_set_params,
222	};
223
224	struct dvb_frontend tda18212_attach(struct dvb_frontend fe,
225	struct i2c_adapter i2c, struct tda18212_config cfg)
226	{
227	struct tda18212_priv *priv = NULL;
228	int ret;
229	u8 val;
230
231	priv = kzalloc(sizeof(struct tda18212_priv), GFP_KERNEL);
232	if (priv == NULL)
233	return NULL;
234
235	priv->cfg = cfg;
236	priv->i2c = i2c;
237	fe->tuner_priv = priv;
238
239	if (fe->ops.i2c_gate_ctrl)
240	fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
241
242	/* check if the tuner is there */
243	ret = tda18212_rd_reg(priv, 0x00, &val);
244
245	if (fe->ops.i2c_gate_ctrl)
246	fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
247
248	dbg("%s: ret:%d chip ID:%02x", __func__, ret, val);
249	if (ret \|\| val != 0xc7) {
250	kfree(priv);
251	return NULL;
252	}
253
254	info("NXP TDA18212HN successfully identified.");
255
256	memcpy(&fe->ops.tuner_ops, &tda18212_tuner_ops,
257	sizeof(struct dvb_tuner_ops));
258
259	return fe;
260	}
261	EXPORT_SYMBOL(tda18212_attach);
262
263	MODULE_DESCRIPTION("NXP TDA18212HN silicon tuner driver");
264	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
265	MODULE_LICENSE("GPL");