[net-next-2.6.git] / drivers / media / common / tuners / mt2131.c

/*
 *  Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
 *
 *  Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>

#include "dvb_frontend.h"

#include "mt2131.h"
#include "mt2131_priv.h"

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

#define dprintk(level,fmt, arg...) if (debug >= level) \
	printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)

static u8 mt2131_config1[] = {
	0x01,
	0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
	0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
	0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
	0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
};

static u8 mt2131_config2[] = {
	0x10,
	0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
};

static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
{
	struct i2c_msg msg[2] = {
		{ .addr = priv->cfg->i2c_address, .flags = 0,
		  .buf = &reg, .len = 1 },
		{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
		  .buf = val,  .len = 1 },
	};

	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
		printk(KERN_WARNING "mt2131 I2C read failed\n");
		return -EREMOTEIO;
	}
	return 0;
}

static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
{
	u8 buf[2] = { reg, val };
	struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
			       .buf = buf, .len = 2 };

	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
		printk(KERN_WARNING "mt2131 I2C write failed\n");
		return -EREMOTEIO;
	}
	return 0;
}

static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
{
	struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
			       .flags = 0, .buf = buf, .len = len };

	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
		printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
		       (int)len);
		return -EREMOTEIO;
	}
	return 0;
}

static int mt2131_set_params(struct dvb_frontend *fe,
			     struct dvb_frontend_parameters *params)
{
	struct mt2131_priv *priv;
	int ret=0, i;
	u32 freq;
	u8  if_band_center;
	u32 f_lo1, f_lo2;
	u32 div1, num1, div2, num2;
	u8  b[8];
	u8 lockval = 0;

	priv = fe->tuner_priv;
	if (fe->ops.info.type == FE_OFDM)
		priv->bandwidth = params->u.ofdm.bandwidth;
	else
		priv->bandwidth = 0;

	freq = params->frequency / 1000;  // Hz -> kHz
	dprintk(1, "%s() freq=%d\n", __func__, freq);

	f_lo1 = freq + MT2131_IF1 * 1000;
	f_lo1 = (f_lo1 / 250) * 250;
	f_lo2 = f_lo1 - freq - MT2131_IF2;

	priv->frequency =  (f_lo1 - f_lo2 - MT2131_IF2) * 1000;

	/* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
	num1 = f_lo1 * 64 / (MT2131_FREF / 128);
	div1 = num1 / 8192;
	num1 &= 0x1fff;

	/* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
	num2 = f_lo2 * 64 / (MT2131_FREF / 128);
	div2 = num2 / 8192;
	num2 &= 0x1fff;

	if (freq <=   82500) if_band_center = 0x00; else
	if (freq <=  137500) if_band_center = 0x01; else
	if (freq <=  192500) if_band_center = 0x02; else
	if (freq <=  247500) if_band_center = 0x03; else
	if (freq <=  302500) if_band_center = 0x04; else
	if (freq <=  357500) if_band_center = 0x05; else
	if (freq <=  412500) if_band_center = 0x06; else
	if (freq <=  467500) if_band_center = 0x07; else
	if (freq <=  522500) if_band_center = 0x08; else
	if (freq <=  577500) if_band_center = 0x09; else
	if (freq <=  632500) if_band_center = 0x0A; else
	if (freq <=  687500) if_band_center = 0x0B; else
	if (freq <=  742500) if_band_center = 0x0C; else
	if (freq <=  797500) if_band_center = 0x0D; else
	if (freq <=  852500) if_band_center = 0x0E; else
	if (freq <=  907500) if_band_center = 0x0F; else
	if (freq <=  962500) if_band_center = 0x10; else
	if (freq <= 1017500) if_band_center = 0x11; else
	if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;

	b[0] = 1;
	b[1] = (num1 >> 5) & 0xFF;
	b[2] = (num1 & 0x1F);
	b[3] = div1;
	b[4] = (num2 >> 5) & 0xFF;
	b[5] = num2 & 0x1F;
	b[6] = div2;

	dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
	dprintk(1, "PLL freq=%dkHz  band=%d\n", (int)freq, (int)if_band_center);
	dprintk(1, "PLL f_lo1=%dkHz  f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
	dprintk(1, "PLL div1=%d  num1=%d  div2=%d  num2=%d\n",
		(int)div1, (int)num1, (int)div2, (int)num2);
	dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
		(int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
		(int)b[6]);

	ret = mt2131_writeregs(priv,b,7);
	if (ret < 0)
		return ret;

	mt2131_writereg(priv, 0x0b, if_band_center);

	/* Wait for lock */
	i = 0;
	do {
		mt2131_readreg(priv, 0x08, &lockval);
		if ((lockval & 0x88) == 0x88)
			break;
		msleep(4);
		i++;
	} while (i < 10);

	return ret;
}

static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct mt2131_priv *priv = fe->tuner_priv;
	dprintk(1, "%s()\n", __func__);
	*frequency = priv->frequency;
	return 0;
}

static int mt2131_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct mt2131_priv *priv = fe->tuner_priv;
	dprintk(1, "%s()\n", __func__);
	*bandwidth = priv->bandwidth;
	return 0;
}

static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
{
	struct mt2131_priv *priv = fe->tuner_priv;
	u8 lock_status = 0;
	u8 afc_status = 0;

	*status = 0;

	mt2131_readreg(priv, 0x08, &lock_status);
	if ((lock_status & 0x88) == 0x88)
		*status = TUNER_STATUS_LOCKED;

	mt2131_readreg(priv, 0x09, &afc_status);
	dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
		__func__, lock_status, afc_status);

	return 0;
}

static int mt2131_init(struct dvb_frontend *fe)
{
	struct mt2131_priv *priv = fe->tuner_priv;
	int ret;
	dprintk(1, "%s()\n", __func__);

	if ((ret = mt2131_writeregs(priv, mt2131_config1,
				    sizeof(mt2131_config1))) < 0)
		return ret;

	mt2131_writereg(priv, 0x0b, 0x09);
	mt2131_writereg(priv, 0x15, 0x47);
	mt2131_writereg(priv, 0x07, 0xf2);
	mt2131_writereg(priv, 0x0b, 0x01);

	if ((ret = mt2131_writeregs(priv, mt2131_config2,
				    sizeof(mt2131_config2))) < 0)
		return ret;

	return ret;
}

static int mt2131_release(struct dvb_frontend *fe)
{
	dprintk(1, "%s()\n", __func__);
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static const struct dvb_tuner_ops mt2131_tuner_ops = {
	.info = {
		.name           = "Microtune MT2131",
		.frequency_min  =  48000000,
		.frequency_max  = 860000000,
		.frequency_step =     50000,
	},

	.release       = mt2131_release,
	.init          = mt2131_init,

	.set_params    = mt2131_set_params,
	.get_frequency = mt2131_get_frequency,
	.get_bandwidth = mt2131_get_bandwidth,
	.get_status    = mt2131_get_status
};

struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
				    struct i2c_adapter *i2c,
				    struct mt2131_config *cfg, u16 if1)
{
	struct mt2131_priv *priv = NULL;
	u8 id = 0;

	dprintk(1, "%s()\n", __func__);

	priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->cfg = cfg;
	priv->bandwidth = 6000000; /* 6MHz */
	priv->i2c = i2c;

	if (mt2131_readreg(priv, 0, &id) != 0) {
		kfree(priv);
		return NULL;
	}
	if ( (id != 0x3E) && (id != 0x3F) ) {
		printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
		       cfg->i2c_address);
		kfree(priv);
		return NULL;
	}

	printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
	       cfg->i2c_address);
	memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
	       sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = priv;
	return fe;
}
EXPORT_SYMBOL(mt2131_attach);

MODULE_AUTHOR("Steven Toth");
MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
MODULE_LICENSE("GPL");

/*
 * Local variables:
 * c-basic-offset: 8
 */
Commit	Line	Data
f47623a0 ST	1	/*
	2	* Driver for Microtune MT2131 "QAM/8VSB single chip tuner"
	3	*
6d897616	4	* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
f47623a0 ST	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	*
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/module.h>
f47623a0 ST	23	#include <linux/delay.h>
	24	#include <linux/dvb/frontend.h>
	25	#include <linux/i2c.h>
5a0e3ad6	26	#include <linux/slab.h>
f47623a0 ST	27
	28	#include "dvb_frontend.h"
	29
	30	#include "mt2131.h"
	31	#include "mt2131_priv.h"
	32
	33	static int debug;
	34	module_param(debug, int, 0644);
	35	MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
	36
	37	#define dprintk(level,fmt, arg...) if (debug >= level) \
	38	printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
	39
	40	static u8 mt2131_config1[] = {
	41	0x01,
	42	0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
	43	0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
	44	0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
	45	0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
	46	};
	47
	48	static u8 mt2131_config2[] = {
	49	0x10,
	50	0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
	51	};
	52
	53	static int mt2131_readreg(struct mt2131_priv priv, u8 reg, u8 val)
	54	{
	55	struct i2c_msg msg[2] = {
3873dd04 MK	56	{ .addr = priv->cfg->i2c_address, .flags = 0,
	57	.buf = &reg, .len = 1 },
	58	{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
	59	.buf = val, .len = 1 },
f47623a0 ST	60	};
	61
	62	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
	63	printk(KERN_WARNING "mt2131 I2C read failed\n");
	64	return -EREMOTEIO;
	65	}
	66	return 0;
	67	}
	68
	69	static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
	70	{
	71	u8 buf[2] = { reg, val };
3873dd04 MK	72	struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
3873dd04 MK	73	.buf = buf, .len = 2 };
f47623a0 ST	74
	75	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
	76	printk(KERN_WARNING "mt2131 I2C write failed\n");
	77	return -EREMOTEIO;
	78	}
	79	return 0;
	80	}
	81
	82	static int mt2131_writeregs(struct mt2131_priv priv,u8 buf, u8 len)
	83	{
3873dd04 MK	84	struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
3873dd04 MK	85	.flags = 0, .buf = buf, .len = len };
f47623a0 ST	86
f47623a0 ST	87	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
3873dd04 MK	88	printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
3873dd04 MK	89	(int)len);
f47623a0 ST	90	return -EREMOTEIO;
	91	}
	92	return 0;
	93	}
	94
3873dd04 MK	95	static int mt2131_set_params(struct dvb_frontend *fe,
3873dd04 MK	96	struct dvb_frontend_parameters *params)
f47623a0 ST	97	{
	98	struct mt2131_priv *priv;
	99	int ret=0, i;
	100	u32 freq;
	101	u8 if_band_center;
3873dd04 MK	102	u32 f_lo1, f_lo2;
3873dd04 MK	103	u32 div1, num1, div2, num2;
f47623a0 ST	104	u8 b[8];
	105	u8 lockval = 0;
	106
	107	priv = fe->tuner_priv;
	108	if (fe->ops.info.type == FE_OFDM)
	109	priv->bandwidth = params->u.ofdm.bandwidth;
	110	else
	111	priv->bandwidth = 0;
	112
	113	freq = params->frequency / 1000; // Hz -> kHz
271ddbf7	114	dprintk(1, "%s() freq=%d\n", __func__, freq);
f47623a0 ST	115
	116	f_lo1 = freq + MT2131_IF1 * 1000;
	117	f_lo1 = (f_lo1 / 250) * 250;
	118	f_lo2 = f_lo1 - freq - MT2131_IF2;
	119
195ccf67	120	priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000;
f47623a0 ST	121
	122	/* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */
	123	num1 = f_lo1 * 64 / (MT2131_FREF / 128);
	124	div1 = num1 / 8192;
	125	num1 &= 0x1fff;
	126
	127	/* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */
	128	num2 = f_lo2 * 64 / (MT2131_FREF / 128);
	129	div2 = num2 / 8192;
	130	num2 &= 0x1fff;
	131
	132	if (freq <= 82500) if_band_center = 0x00; else
	133	if (freq <= 137500) if_band_center = 0x01; else
	134	if (freq <= 192500) if_band_center = 0x02; else
	135	if (freq <= 247500) if_band_center = 0x03; else
	136	if (freq <= 302500) if_band_center = 0x04; else
	137	if (freq <= 357500) if_band_center = 0x05; else
	138	if (freq <= 412500) if_band_center = 0x06; else
	139	if (freq <= 467500) if_band_center = 0x07; else
	140	if (freq <= 522500) if_band_center = 0x08; else
	141	if (freq <= 577500) if_band_center = 0x09; else
	142	if (freq <= 632500) if_band_center = 0x0A; else
	143	if (freq <= 687500) if_band_center = 0x0B; else
	144	if (freq <= 742500) if_band_center = 0x0C; else
	145	if (freq <= 797500) if_band_center = 0x0D; else
	146	if (freq <= 852500) if_band_center = 0x0E; else
	147	if (freq <= 907500) if_band_center = 0x0F; else
	148	if (freq <= 962500) if_band_center = 0x10; else
	149	if (freq <= 1017500) if_band_center = 0x11; else
	150	if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
	151
	152	b[0] = 1;
	153	b[1] = (num1 >> 5) & 0xFF;
	154	b[2] = (num1 & 0x1F);
	155	b[3] = div1;
	156	b[4] = (num2 >> 5) & 0xFF;
	157	b[5] = num2 & 0x1F;
	158	b[6] = div2;
	159
	160	dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
	161	dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
	162	dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
	163	dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
	164	(int)div1, (int)num1, (int)div2, (int)num2);
	165	dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
	166	(int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
	167	(int)b[6]);
	168
	169	ret = mt2131_writeregs(priv,b,7);
	170	if (ret < 0)
	171	return ret;
	172
	173	mt2131_writereg(priv, 0x0b, if_band_center);
	174
	175	/* Wait for lock */
	176	i = 0;
	177	do {
	178	mt2131_readreg(priv, 0x08, &lockval);
	179	if ((lockval & 0x88) == 0x88)
	180	break;
	181	msleep(4);
	182	i++;
	183	} while (i < 10);
	184
185	return ret;
186	}
187
188	static int mt2131_get_frequency(struct dvb_frontend fe, u32 frequency)
189	{
190	struct mt2131_priv *priv = fe->tuner_priv;
271ddbf7	191	dprintk(1, "%s()\n", __func__);
f47623a0 ST	192	*frequency = priv->frequency;
	193	return 0;
	194	}
	195
	196	static int mt2131_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	197	{
	198	struct mt2131_priv *priv = fe->tuner_priv;
271ddbf7	199	dprintk(1, "%s()\n", __func__);
f47623a0 ST	200	*bandwidth = priv->bandwidth;
	201	return 0;
	202	}
	203
	204	static int mt2131_get_status(struct dvb_frontend fe, u32 status)
	205	{
	206	struct mt2131_priv *priv = fe->tuner_priv;
	207	u8 lock_status = 0;
	208	u8 afc_status = 0;
	209
	210	*status = 0;
	211
	212	mt2131_readreg(priv, 0x08, &lock_status);
	213	if ((lock_status & 0x88) == 0x88)
	214	*status = TUNER_STATUS_LOCKED;
	215
	216	mt2131_readreg(priv, 0x09, &afc_status);
	217	dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
271ddbf7	218	__func__, lock_status, afc_status);
f47623a0 ST	219
	220	return 0;
	221	}
	222
	223	static int mt2131_init(struct dvb_frontend *fe)
	224	{
	225	struct mt2131_priv *priv = fe->tuner_priv;
	226	int ret;
271ddbf7	227	dprintk(1, "%s()\n", __func__);
f47623a0	228
3873dd04 MK	229	if ((ret = mt2131_writeregs(priv, mt2131_config1,
3873dd04 MK	230	sizeof(mt2131_config1))) < 0)
f47623a0 ST	231	return ret;
	232
	233	mt2131_writereg(priv, 0x0b, 0x09);
	234	mt2131_writereg(priv, 0x15, 0x47);
	235	mt2131_writereg(priv, 0x07, 0xf2);
	236	mt2131_writereg(priv, 0x0b, 0x01);
	237
3873dd04 MK	238	if ((ret = mt2131_writeregs(priv, mt2131_config2,
3873dd04 MK	239	sizeof(mt2131_config2))) < 0)
f47623a0 ST	240	return ret;
	241
	242	return ret;
	243	}
	244
	245	static int mt2131_release(struct dvb_frontend *fe)
	246	{
271ddbf7	247	dprintk(1, "%s()\n", __func__);
f47623a0 ST	248	kfree(fe->tuner_priv);
	249	fe->tuner_priv = NULL;
	250	return 0;
	251	}
	252
	253	static const struct dvb_tuner_ops mt2131_tuner_ops = {
	254	.info = {
	255	.name = "Microtune MT2131",
	256	.frequency_min = 48000000,
	257	.frequency_max = 860000000,
	258	.frequency_step = 50000,
	259	},
	260
	261	.release = mt2131_release,
	262	.init = mt2131_init,
	263
	264	.set_params = mt2131_set_params,
	265	.get_frequency = mt2131_get_frequency,
	266	.get_bandwidth = mt2131_get_bandwidth,
	267	.get_status = mt2131_get_status
	268	};
	269
3873dd04 MK	270	struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
	271	struct i2c_adapter *i2c,
	272	struct mt2131_config *cfg, u16 if1)
f47623a0 ST	273	{
	274	struct mt2131_priv *priv = NULL;
	275	u8 id = 0;
	276
271ddbf7	277	dprintk(1, "%s()\n", __func__);
f47623a0 ST	278
	279	priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
	280	if (priv == NULL)
	281	return NULL;
	282
	283	priv->cfg = cfg;
	284	priv->bandwidth = 6000000; /* 6MHz */
	285	priv->i2c = i2c;
	286
	287	if (mt2131_readreg(priv, 0, &id) != 0) {
	288	kfree(priv);
	289	return NULL;
	290	}
	291	if ( (id != 0x3E) && (id != 0x3F) ) {
3873dd04 MK	292	printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
3873dd04 MK	293	cfg->i2c_address);
f47623a0 ST	294	kfree(priv);
	295	return NULL;
	296	}
	297
3873dd04 MK	298	printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
	299	cfg->i2c_address);
	300	memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
	301	sizeof(struct dvb_tuner_ops));
f47623a0 ST	302
	303	fe->tuner_priv = priv;
	304	return fe;
	305	}
	306	EXPORT_SYMBOL(mt2131_attach);
	307
	308	MODULE_AUTHOR("Steven Toth");
	309	MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
	310	MODULE_LICENSE("GPL");
3873dd04 MK	311
	312	/*
	313	* Local variables:
	314	* c-basic-offset: 8
	315	*/