[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / tuners / mt2060.c

/*
 *  Driver for Microtune MT2060 "Single chip dual conversion broadband tuner"
 *
 *  Copyright (c) 2006 Olivier DANET <odanet@caramail.com>
 *
 *  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.=
 */

/* In that file, frequencies are expressed in kiloHertz to avoid 32 bits overflows */

#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 "mt2060.h"
#include "mt2060_priv.h"

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

#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2060: " args); printk("\n"); }} while (0)

// Reads a single register
static int mt2060_readreg(struct mt2060_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 "mt2060 I2C read failed\n");
		return -EREMOTEIO;
	}
	return 0;
}

// Writes a single register
static int mt2060_writereg(struct mt2060_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 "mt2060 I2C write failed\n");
		return -EREMOTEIO;
	}
	return 0;
}

// Writes a set of consecutive registers
static int mt2060_writeregs(struct mt2060_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 "mt2060 I2C write failed (len=%i)\n",(int)len);
		return -EREMOTEIO;
	}
	return 0;
}

// Initialisation sequences
// LNABAND=3, NUM1=0x3C, DIV1=0x74, NUM2=0x1080, DIV2=0x49
static u8 mt2060_config1[] = {
	REG_LO1C1,
	0x3F,	0x74,	0x00,	0x08,	0x93
};

// FMCG=2, GP2=0, GP1=0
static u8 mt2060_config2[] = {
	REG_MISC_CTRL,
	0x20,	0x1E,	0x30,	0xff,	0x80,	0xff,	0x00,	0x2c,	0x42
};

//  VGAG=3, V1CSE=1

#ifdef  MT2060_SPURCHECK
/* The function below calculates the frequency offset between the output frequency if2
 and the closer cross modulation subcarrier between lo1 and lo2 up to the tenth harmonic */
static int mt2060_spurcalc(u32 lo1,u32 lo2,u32 if2)
{
	int I,J;
	int dia,diamin,diff;
	diamin=1000000;
	for (I = 1; I < 10; I++) {
		J = ((2*I*lo1)/lo2+1)/2;
		diff = I*(int)lo1-J*(int)lo2;
		if (diff < 0) diff=-diff;
		dia = (diff-(int)if2);
		if (dia < 0) dia=-dia;
		if (diamin > dia) diamin=dia;
	}
	return diamin;
}

#define BANDWIDTH 4000 // kHz

/* Calculates the frequency offset to add to avoid spurs. Returns 0 if no offset is needed */
static int mt2060_spurcheck(u32 lo1,u32 lo2,u32 if2)
{
	u32 Spur,Sp1,Sp2;
	int I,J;
	I=0;
	J=1000;

	Spur=mt2060_spurcalc(lo1,lo2,if2);
	if (Spur < BANDWIDTH) {
		/* Potential spurs detected */
		dprintk("Spurs before : f_lo1: %d  f_lo2: %d  (kHz)",
			(int)lo1,(int)lo2);
		I=1000;
		Sp1 = mt2060_spurcalc(lo1+I,lo2+I,if2);
		Sp2 = mt2060_spurcalc(lo1-I,lo2-I,if2);

		if (Sp1 < Sp2) {
			J=-J; I=-I; Spur=Sp2;
		} else
			Spur=Sp1;

		while (Spur < BANDWIDTH) {
			I += J;
			Spur = mt2060_spurcalc(lo1+I,lo2+I,if2);
		}
		dprintk("Spurs after  : f_lo1: %d  f_lo2: %d  (kHz)",
			(int)(lo1+I),(int)(lo2+I));
	}
	return I;
}
#endif

#define IF2  36150       // IF2 frequency = 36.150 MHz
#define FREF 16000       // Quartz oscillator 16 MHz

static int mt2060_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct mt2060_priv *priv;
	int ret=0;
	int i=0;
	u32 freq;
	u8  lnaband;
	u32 f_lo1,f_lo2;
	u32 div1,num1,div2,num2;
	u8  b[8];
	u32 if1;

	priv = fe->tuner_priv;

	if1 = priv->if1_freq;
	b[0] = REG_LO1B1;
	b[1] = 0xFF;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */

	mt2060_writeregs(priv,b,2);

	freq = c->frequency / 1000; /* Hz -> kHz */

	f_lo1 = freq + if1 * 1000;
	f_lo1 = (f_lo1 / 250) * 250;
	f_lo2 = f_lo1 - freq - IF2;
	// From the Comtech datasheet, the step used is 50kHz. The tuner chip could be more precise
	f_lo2 = ((f_lo2 + 25) / 50) * 50;
	priv->frequency =  (f_lo1 - f_lo2 - IF2) * 1000,

#ifdef MT2060_SPURCHECK
	// LO-related spurs detection and correction
	num1   = mt2060_spurcheck(f_lo1,f_lo2,IF2);
	f_lo1 += num1;
	f_lo2 += num1;
#endif
	//Frequency LO1 = 16MHz * (DIV1 + NUM1/64 )
	num1 = f_lo1 / (FREF / 64);
	div1 = num1 / 64;
	num1 &= 0x3f;

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

	if (freq <=  95000) lnaband = 0xB0; else
	if (freq <= 180000) lnaband = 0xA0; else
	if (freq <= 260000) lnaband = 0x90; else
	if (freq <= 335000) lnaband = 0x80; else
	if (freq <= 425000) lnaband = 0x70; else
	if (freq <= 480000) lnaband = 0x60; else
	if (freq <= 570000) lnaband = 0x50; else
	if (freq <= 645000) lnaband = 0x40; else
	if (freq <= 730000) lnaband = 0x30; else
	if (freq <= 810000) lnaband = 0x20; else lnaband = 0x10;

	b[0] = REG_LO1C1;
	b[1] = lnaband | ((num1 >>2) & 0x0F);
	b[2] = div1;
	b[3] = (num2 & 0x0F)  | ((num1 & 3) << 4);
	b[4] = num2 >> 4;
	b[5] = ((num2 >>12) & 1) | (div2 << 1);

	dprintk("IF1: %dMHz",(int)if1);
	dprintk("PLL freq=%dkHz  f_lo1=%dkHz  f_lo2=%dkHz",(int)freq,(int)f_lo1,(int)f_lo2);
	dprintk("PLL div1=%d  num1=%d  div2=%d  num2=%d",(int)div1,(int)num1,(int)div2,(int)num2);
	dprintk("PLL [1..5]: %2x %2x %2x %2x %2x",(int)b[1],(int)b[2],(int)b[3],(int)b[4],(int)b[5]);

	mt2060_writeregs(priv,b,6);

	//Waits for pll lock or timeout
	i = 0;
	do {
		mt2060_readreg(priv,REG_LO_STATUS,b);
		if ((b[0] & 0x88)==0x88)
			break;
		msleep(4);
		i++;
	} while (i<10);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

	return ret;
}

static void mt2060_calibrate(struct mt2060_priv *priv)
{
	u8 b = 0;
	int i = 0;

	if (mt2060_writeregs(priv,mt2060_config1,sizeof(mt2060_config1)))
		return;
	if (mt2060_writeregs(priv,mt2060_config2,sizeof(mt2060_config2)))
		return;

	/* initialize the clock output */
	mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x30);

	do {
		b |= (1 << 6); // FM1SS;
		mt2060_writereg(priv, REG_LO2C1,b);
		msleep(20);

		if (i == 0) {
			b |= (1 << 7); // FM1CA;
			mt2060_writereg(priv, REG_LO2C1,b);
			b &= ~(1 << 7); // FM1CA;
			msleep(20);
		}

		b &= ~(1 << 6); // FM1SS
		mt2060_writereg(priv, REG_LO2C1,b);

		msleep(20);
		i++;
	} while (i < 9);

	i = 0;
	while (i++ < 10 && mt2060_readreg(priv, REG_MISC_STAT, &b) == 0 && (b & (1 << 6)) == 0)
		msleep(20);

	if (i <= 10) {
		mt2060_readreg(priv, REG_FM_FREQ, &priv->fmfreq); // now find out, what is fmreq used for :)
		dprintk("calibration was successful: %d", (int)priv->fmfreq);
	} else
		dprintk("FMCAL timed out");
}

static int mt2060_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct mt2060_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
}

static int mt2060_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	*frequency = IF2 * 1000;
	return 0;
}

static int mt2060_init(struct dvb_frontend *fe)
{
	struct mt2060_priv *priv = fe->tuner_priv;
	int ret;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */

	ret = mt2060_writereg(priv, REG_VGAG,
			      (priv->cfg->clock_out << 6) | 0x33);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

	return ret;
}

static int mt2060_sleep(struct dvb_frontend *fe)
{
	struct mt2060_priv *priv = fe->tuner_priv;
	int ret;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */

	ret = mt2060_writereg(priv, REG_VGAG,
			      (priv->cfg->clock_out << 6) | 0x30);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

	return ret;
}

static int mt2060_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static const struct dvb_tuner_ops mt2060_tuner_ops = {
	.info = {
		.name           = "Microtune MT2060",
		.frequency_min  =  48000000,
		.frequency_max  = 860000000,
		.frequency_step =     50000,
	},

	.release       = mt2060_release,

	.init          = mt2060_init,
	.sleep         = mt2060_sleep,

	.set_params    = mt2060_set_params,
	.get_frequency = mt2060_get_frequency,
	.get_if_frequency = mt2060_get_if_frequency,
};

/* This functions tries to identify a MT2060 tuner by reading the PART/REV register. This is hasty. */
struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2060_config *cfg, u16 if1)
{
	struct mt2060_priv *priv = NULL;
	u8 id = 0;

	priv = kzalloc(sizeof(struct mt2060_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->cfg      = cfg;
	priv->i2c      = i2c;
	priv->if1_freq = if1;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */

	if (mt2060_readreg(priv,REG_PART_REV,&id) != 0) {
		kfree(priv);
		return NULL;
	}

	if (id != PART_REV) {
		kfree(priv);
		return NULL;
	}
	printk(KERN_INFO "MT2060: successfully identified (IF1 = %d)\n", if1);
	memcpy(&fe->ops.tuner_ops, &mt2060_tuner_ops, sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = priv;

	mt2060_calibrate(priv);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

	return fe;
}
EXPORT_SYMBOL(mt2060_attach);

MODULE_AUTHOR("Olivier DANET");
MODULE_DESCRIPTION("Microtune MT2060 silicon tuner driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
4de2730a PB	1	/*
	2	* Driver for Microtune MT2060 "Single chip dual conversion broadband tuner"
	3	*
	4	* Copyright (c) 2006 Olivier DANET <odanet@caramail.com>
	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
4de2730a PB	22	/* In that file, frequencies are expressed in kiloHertz to avoid 32 bits overflows */
	23
	24	#include <linux/module.h>
4de2730a PB	25	#include <linux/delay.h>
4de2730a PB	26	#include <linux/dvb/frontend.h>
46f73f93	27	#include <linux/i2c.h>
5a0e3ad6	28	#include <linux/slab.h>
46f73f93 OD	29
	30	#include "dvb_frontend.h"
	31
4de2730a PB	32	#include "mt2060.h"
	33	#include "mt2060_priv.h"
	34
b7571f8d	35	static int debug;
4de2730a PB	36	module_param(debug, int, 0644);
	37	MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
	38
46f73f93	39	#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2060: " args); printk("\n"); }} while (0)
4de2730a PB	40
4de2730a PB	41	// Reads a single register
46f73f93	42	static int mt2060_readreg(struct mt2060_priv priv, u8 reg, u8 val)
4de2730a PB	43	{
4de2730a PB	44	struct i2c_msg msg[2] = {
46f73f93 OD	45	{ .addr = priv->cfg->i2c_address, .flags = 0, .buf = &reg, .len = 1 },
46f73f93 OD	46	{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 },
4de2730a PB	47	};
4de2730a PB	48
46f73f93	49	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
4de2730a PB	50	printk(KERN_WARNING "mt2060 I2C read failed\n");
	51	return -EREMOTEIO;
	52	}
	53	return 0;
	54	}
	55
	56	// Writes a single register
46f73f93	57	static int mt2060_writereg(struct mt2060_priv *priv, u8 reg, u8 val)
4de2730a	58	{
46f73f93	59	u8 buf[2] = { reg, val };
4de2730a	60	struct i2c_msg msg = {
46f73f93	61	.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2
4de2730a	62	};
4de2730a	63
46f73f93	64	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
4de2730a PB	65	printk(KERN_WARNING "mt2060 I2C write failed\n");
	66	return -EREMOTEIO;
	67	}
	68	return 0;
	69	}
	70
	71	// Writes a set of consecutive registers
46f73f93	72	static int mt2060_writeregs(struct mt2060_priv priv,u8 buf, u8 len)
4de2730a PB	73	{
4de2730a PB	74	struct i2c_msg msg = {
46f73f93	75	.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len
4de2730a	76	};
46f73f93	77	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
4de2730a PB	78	printk(KERN_WARNING "mt2060 I2C write failed (len=%i)\n",(int)len);
	79	return -EREMOTEIO;
	80	}
	81	return 0;
	82	}
	83
	84	// Initialisation sequences
	85	// LNABAND=3, NUM1=0x3C, DIV1=0x74, NUM2=0x1080, DIV2=0x49
	86	static u8 mt2060_config1[] = {
	87	REG_LO1C1,
	88	0x3F, 0x74, 0x00, 0x08, 0x93
	89	};
	90
	91	// FMCG=2, GP2=0, GP1=0
	92	static u8 mt2060_config2[] = {
	93	REG_MISC_CTRL,
	94	0x20, 0x1E, 0x30, 0xff, 0x80, 0xff, 0x00, 0x2c, 0x42
	95	};
	96
	97	// VGAG=3, V1CSE=1
4de2730a PB	98
	99	#ifdef MT2060_SPURCHECK
	100	/* The function below calculates the frequency offset between the output frequency if2
	101	and the closer cross modulation subcarrier between lo1 and lo2 up to the tenth harmonic */
	102	static int mt2060_spurcalc(u32 lo1,u32 lo2,u32 if2)
	103	{
	104	int I,J;
	105	int dia,diamin,diff;
	106	diamin=1000000;
	107	for (I = 1; I < 10; I++) {
	108	J = ((2Ilo1)/lo2+1)/2;
	109	diff = I(int)lo1-J(int)lo2;
	110	if (diff < 0) diff=-diff;
	111	dia = (diff-(int)if2);
	112	if (dia < 0) dia=-dia;
	113	if (diamin > dia) diamin=dia;
	114	}
	115	return diamin;
	116	}
	117
	118	#define BANDWIDTH 4000 // kHz
	119
	120	/* Calculates the frequency offset to add to avoid spurs. Returns 0 if no offset is needed */
	121	static int mt2060_spurcheck(u32 lo1,u32 lo2,u32 if2)
	122	{
	123	u32 Spur,Sp1,Sp2;
	124	int I,J;
	125	I=0;
	126	J=1000;
	127
	128	Spur=mt2060_spurcalc(lo1,lo2,if2);
	129	if (Spur < BANDWIDTH) {
	130	/* Potential spurs detected */
	131	dprintk("Spurs before : f_lo1: %d f_lo2: %d (kHz)",
	132	(int)lo1,(int)lo2);
	133	I=1000;
	134	Sp1 = mt2060_spurcalc(lo1+I,lo2+I,if2);
	135	Sp2 = mt2060_spurcalc(lo1-I,lo2-I,if2);
	136
	137	if (Sp1 < Sp2) {
	138	J=-J; I=-I; Spur=Sp2;
	139	} else
	140	Spur=Sp1;
	141
	142	while (Spur < BANDWIDTH) {
	143	I += J;
	144	Spur = mt2060_spurcalc(lo1+I,lo2+I,if2);
	145	}
	146	dprintk("Spurs after : f_lo1: %d f_lo2: %d (kHz)",
	147	(int)(lo1+I),(int)(lo2+I));
	148	}
	149	return I;
	150	}
	151	#endif
	152
	153	#define IF2 36150 // IF2 frequency = 36.150 MHz
	154	#define FREF 16000 // Quartz oscillator 16 MHz
	155
14d24d14	156	static int mt2060_set_params(struct dvb_frontend *fe)
4de2730a	157	{
2676c258	158	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
46f73f93	159	struct mt2060_priv *priv;
4de2730a PB	160	int ret=0;
	161	int i=0;
	162	u32 freq;
	163	u8 lnaband;
	164	u32 f_lo1,f_lo2;
	165	u32 div1,num1,div2,num2;
	166	u8 b[8];
	167	u32 if1;
	168
46f73f93 OD	169	priv = fe->tuner_priv;
	170
	171	if1 = priv->if1_freq;
4de2730a PB	172	b[0] = REG_LO1B1;
4de2730a PB	173	b[1] = 0xFF;
4de2730a	174
6e623433 AP	175	if (fe->ops.i2c_gate_ctrl)
	176	fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
	177
46f73f93	178	mt2060_writeregs(priv,b,2);
4de2730a	179
2676c258	180	freq = c->frequency / 1000; /* Hz -> kHz */
46f73f93 OD	181
	182	f_lo1 = freq + if1 * 1000;
	183	f_lo1 = (f_lo1 / 250) * 250;
	184	f_lo2 = f_lo1 - freq - IF2;
	185	// From the Comtech datasheet, the step used is 50kHz. The tuner chip could be more precise
	186	f_lo2 = ((f_lo2 + 25) / 50) * 50;
	187	priv->frequency = (f_lo1 - f_lo2 - IF2) * 1000,
4de2730a PB	188
	189	#ifdef MT2060_SPURCHECK
	190	// LO-related spurs detection and correction
	191	num1 = mt2060_spurcheck(f_lo1,f_lo2,IF2);
	192	f_lo1 += num1;
	193	f_lo2 += num1;
	194	#endif
	195	//Frequency LO1 = 16MHz * (DIV1 + NUM1/64 )
46f73f93 OD	196	num1 = f_lo1 / (FREF / 64);
	197	div1 = num1 / 64;
	198	num1 &= 0x3f;
4de2730a PB	199
4de2730a PB	200	// Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 )
46f73f93 OD	201	num2 = f_lo2 * 64 / (FREF / 128);
	202	div2 = num2 / 8192;
	203	num2 &= 0x1fff;
4de2730a PB	204
	205	if (freq <= 95000) lnaband = 0xB0; else
	206	if (freq <= 180000) lnaband = 0xA0; else
	207	if (freq <= 260000) lnaband = 0x90; else
	208	if (freq <= 335000) lnaband = 0x80; else
	209	if (freq <= 425000) lnaband = 0x70; else
	210	if (freq <= 480000) lnaband = 0x60; else
	211	if (freq <= 570000) lnaband = 0x50; else
	212	if (freq <= 645000) lnaband = 0x40; else
	213	if (freq <= 730000) lnaband = 0x30; else
	214	if (freq <= 810000) lnaband = 0x20; else lnaband = 0x10;
	215
	216	b[0] = REG_LO1C1;
	217	b[1] = lnaband \| ((num1 >>2) & 0x0F);
	218	b[2] = div1;
	219	b[3] = (num2 & 0x0F) \| ((num1 & 3) << 4);
	220	b[4] = num2 >> 4;
	221	b[5] = ((num2 >>12) & 1) \| (div2 << 1);
	222
	223	dprintk("IF1: %dMHz",(int)if1);
46f73f93 OD	224	dprintk("PLL freq=%dkHz f_lo1=%dkHz f_lo2=%dkHz",(int)freq,(int)f_lo1,(int)f_lo2);
46f73f93 OD	225	dprintk("PLL div1=%d num1=%d div2=%d num2=%d",(int)div1,(int)num1,(int)div2,(int)num2);
4de2730a PB	226	dprintk("PLL [1..5]: %2x %2x %2x %2x %2x",(int)b[1],(int)b[2],(int)b[3],(int)b[4],(int)b[5]);
4de2730a PB	227
46f73f93	228	mt2060_writeregs(priv,b,6);
4de2730a PB	229
4de2730a PB	230	//Waits for pll lock or timeout
46f73f93	231	i = 0;
4de2730a	232	do {
46f73f93 OD	233	mt2060_readreg(priv,REG_LO_STATUS,b);
	234	if ((b[0] & 0x88)==0x88)
	235	break;
4de2730a PB	236	msleep(4);
	237	i++;
	238	} while (i<10);
	239
6e623433 AP	240	if (fe->ops.i2c_gate_ctrl)
	241	fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
	242
4de2730a PB	243	return ret;
4de2730a PB	244	}
4de2730a	245
46f73f93	246	static void mt2060_calibrate(struct mt2060_priv *priv)
4de2730a PB	247	{
	248	u8 b = 0;
	249	int i = 0;
	250
46f73f93	251	if (mt2060_writeregs(priv,mt2060_config1,sizeof(mt2060_config1)))
4de2730a	252	return;
46f73f93	253	if (mt2060_writeregs(priv,mt2060_config2,sizeof(mt2060_config2)))
4de2730a PB	254	return;
4de2730a PB	255
136cafbf PB	256	/* initialize the clock output */
	257	mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) \| 0x30);
	258
4de2730a PB	259	do {
4de2730a PB	260	b \|= (1 << 6); // FM1SS;
46f73f93	261	mt2060_writereg(priv, REG_LO2C1,b);
4de2730a PB	262	msleep(20);
	263
	264	if (i == 0) {
	265	b \|= (1 << 7); // FM1CA;
46f73f93	266	mt2060_writereg(priv, REG_LO2C1,b);
4de2730a PB	267	b &= ~(1 << 7); // FM1CA;
	268	msleep(20);
	269	}
	270
	271	b &= ~(1 << 6); // FM1SS
46f73f93	272	mt2060_writereg(priv, REG_LO2C1,b);
4de2730a PB	273
	274	msleep(20);
	275	i++;
	276	} while (i < 9);
	277
	278	i = 0;
46f73f93	279	while (i++ < 10 && mt2060_readreg(priv, REG_MISC_STAT, &b) == 0 && (b & (1 << 6)) == 0)
4de2730a PB	280	msleep(20);
4de2730a PB	281
7d979a86	282	if (i <= 10) {
46f73f93 OD	283	mt2060_readreg(priv, REG_FM_FREQ, &priv->fmfreq); // now find out, what is fmreq used for :)
46f73f93 OD	284	dprintk("calibration was successful: %d", (int)priv->fmfreq);
4de2730a PB	285	} else
	286	dprintk("FMCAL timed out");
	287	}
	288
46f73f93 OD	289	static int mt2060_get_frequency(struct dvb_frontend fe, u32 frequency)
	290	{
	291	struct mt2060_priv *priv = fe->tuner_priv;
	292	*frequency = priv->frequency;
	293	return 0;
	294	}
	295
055327c5 AP	296	static int mt2060_get_if_frequency(struct dvb_frontend fe, u32 frequency)
	297	{
	298	frequency = IF2 1000;
	299	return 0;
	300	}
	301
294d83d7 MC	302	static int mt2060_init(struct dvb_frontend *fe)
	303	{
	304	struct mt2060_priv *priv = fe->tuner_priv;
6e623433 AP	305	int ret;
	306
	307	if (fe->ops.i2c_gate_ctrl)
	308	fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
	309
	310	ret = mt2060_writereg(priv, REG_VGAG,
	311	(priv->cfg->clock_out << 6) \| 0x33);
	312
	313	if (fe->ops.i2c_gate_ctrl)
	314	fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
	315
	316	return ret;
294d83d7 MC	317	}
294d83d7 MC	318
46f73f93 OD	319	static int mt2060_sleep(struct dvb_frontend *fe)
	320	{
	321	struct mt2060_priv *priv = fe->tuner_priv;
6e623433 AP	322	int ret;
	323
	324	if (fe->ops.i2c_gate_ctrl)
	325	fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
	326
	327	ret = mt2060_writereg(priv, REG_VGAG,
	328	(priv->cfg->clock_out << 6) \| 0x30);
	329
	330	if (fe->ops.i2c_gate_ctrl)
	331	fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
	332
	333	return ret;
46f73f93 OD	334	}
	335
	336	static int mt2060_release(struct dvb_frontend *fe)
	337	{
	338	kfree(fe->tuner_priv);
	339	fe->tuner_priv = NULL;
	340	return 0;
	341	}
	342
	343	static const struct dvb_tuner_ops mt2060_tuner_ops = {
	344	.info = {
	345	.name = "Microtune MT2060",
	346	.frequency_min = 48000000,
	347	.frequency_max = 860000000,
	348	.frequency_step = 50000,
	349	},
	350
	351	.release = mt2060_release,
	352
294d83d7	353	.init = mt2060_init,
46f73f93 OD	354	.sleep = mt2060_sleep,
	355
	356	.set_params = mt2060_set_params,
46f73f93	357	.get_frequency = mt2060_get_frequency,
055327c5	358	.get_if_frequency = mt2060_get_if_frequency,
46f73f93 OD	359	};
46f73f93 OD	360
4de2730a	361	/* This functions tries to identify a MT2060 tuner by reading the PART/REV register. This is hasty. */
6958effe	362	struct dvb_frontend * mt2060_attach(struct dvb_frontend fe, struct i2c_adapter i2c, struct mt2060_config *cfg, u16 if1)
4de2730a	363	{
46f73f93	364	struct mt2060_priv *priv = NULL;
4de2730a	365	u8 id = 0;
4de2730a	366
46f73f93 OD	367	priv = kzalloc(sizeof(struct mt2060_priv), GFP_KERNEL);
46f73f93 OD	368	if (priv == NULL)
6958effe	369	return NULL;
4de2730a	370
46f73f93 OD	371	priv->cfg = cfg;
	372	priv->i2c = i2c;
	373	priv->if1_freq = if1;
4de2730a	374
6e623433 AP	375	if (fe->ops.i2c_gate_ctrl)
	376	fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
	377
46f73f93 OD	378	if (mt2060_readreg(priv,REG_PART_REV,&id) != 0) {
46f73f93 OD	379	kfree(priv);
6958effe	380	return NULL;
46f73f93	381	}
4de2730a	382
46f73f93 OD	383	if (id != PART_REV) {
46f73f93 OD	384	kfree(priv);
6958effe	385	return NULL;
46f73f93	386	}
b7571f8d	387	printk(KERN_INFO "MT2060: successfully identified (IF1 = %d)\n", if1);
46f73f93 OD	388	memcpy(&fe->ops.tuner_ops, &mt2060_tuner_ops, sizeof(struct dvb_tuner_ops));
	389
	390	fe->tuner_priv = priv;
4de2730a	391
46f73f93	392	mt2060_calibrate(priv);
4de2730a	393
6e623433 AP	394	if (fe->ops.i2c_gate_ctrl)
	395	fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
	396
6958effe	397	return fe;
4de2730a PB	398	}
	399	EXPORT_SYMBOL(mt2060_attach);
	400
	401	MODULE_AUTHOR("Olivier DANET");
	402	MODULE_DESCRIPTION("Microtune MT2060 silicon tuner driver");
	403	MODULE_LICENSE("GPL");