[linux-2.6-block.git] / drivers / media / dvb-frontends / stv6110.c

/*
 * stv6110.c
 *
 * Driver for ST STV6110 satellite tuner IC.
 *
 * Copyright (C) 2009 NetUP Inc.
 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
 *
 * 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.
 */

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

#include <linux/types.h>

#include "stv6110.h"

/* Max transfer size done by I2C transfer functions */
#define MAX_XFER_SIZE  64

static int debug;

struct stv6110_priv {
	int i2c_address;
	struct i2c_adapter *i2c;

	u32 mclk;
	u8 clk_div;
	u8 gain;
	u8 regs[8];
};

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

static s32 abssub(s32 a, s32 b)
{
	if (a > b)
		return a - b;
	else
		return b - a;
};

static void stv6110_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
}

static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
							int start, int len)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	int rc;
	u8 cmdbuf[MAX_XFER_SIZE];
	struct i2c_msg msg = {
		.addr	= priv->i2c_address,
		.flags	= 0,
		.buf	= cmdbuf,
		.len	= len + 1
	};

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

	if (1 + len > sizeof(cmdbuf)) {
		printk(KERN_WARNING
		       "%s: i2c wr: len=%d is too big!\n",
		       KBUILD_MODNAME, len);
		return -EINVAL;
	}

	if (start + len > 8)
		return -EINVAL;

	memcpy(&cmdbuf[1], buf, len);
	cmdbuf[0] = start;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	rc = i2c_transfer(priv->i2c, &msg, 1);
	if (rc != 1)
		dprintk("%s: i2c error\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	return 0;
}

static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
							int start, int len)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	int rc;
	u8 reg[] = { start };
	struct i2c_msg msg[] = {
		{
			.addr	= priv->i2c_address,
			.flags	= 0,
			.buf	= reg,
			.len	= 1,
		}, {
			.addr	= priv->i2c_address,
			.flags	= I2C_M_RD,
			.buf	= regs,
			.len	= len,
		},
	};

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	rc = i2c_transfer(priv->i2c, msg, 2);
	if (rc != 2)
		dprintk("%s: i2c error\n", __func__);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	memcpy(&priv->regs[start], regs, len);

	return 0;
}

static int stv6110_read_reg(struct dvb_frontend *fe, int start)
{
	u8 buf[] = { 0 };
	stv6110_read_regs(fe, buf, start, 1);

	return buf[0];
}

static int stv6110_sleep(struct dvb_frontend *fe)
{
	u8 reg[] = { 0 };
	stv6110_write_regs(fe, reg, 0, 1);

	return 0;
}

static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff)
{
	u32 rlf;

	switch (rolloff) {
	case ROLLOFF_20:
		rlf = 20;
		break;
	case ROLLOFF_25:
		rlf = 25;
		break;
	default:
		rlf = 35;
		break;
	}

	return symbol_rate  + ((symbol_rate * rlf) / 100);
}

static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	u8 r8, ret = 0x04;
	int i;

	if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/
		r8 = 31;
	else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
		r8 = 0;
	else /*if 5 < BW/2 < 36*/
		r8 = (bandwidth / 2) / 1000000 - 5;

	/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
	/* ctrl3, CF = r8 Set the LPF value */
	priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f);
	priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f);
	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
	priv->regs[RSTV6110_STAT1] |= 0x02;
	stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);

	i = 0;
	/* Wait for CALRCSTRT == 0 */
	while ((i < 10) && (ret != 0)) {
		ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
		mdelay(1);	/* wait for LPF auto calibration */
		i++;
	}

	/* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
	priv->regs[RSTV6110_CTRL3] |= (1 << 6);
	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	return 0;
}

static int stv6110_init(struct dvb_frontend *fe)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };

	memcpy(priv->regs, buf0, 8);
	/* K = (Reference / 1000000) - 16 */
	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	priv->regs[RSTV6110_CTRL1] |=
				((((priv->mclk / 1000000) - 16) & 0x1f) << 3);

	/* divisor value for the output clock */
	priv->regs[RSTV6110_CTRL2] &= ~0xc0;
	priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6);

	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
	msleep(1);
	stv6110_set_bandwidth(fe, 72000000);

	return 0;
}

static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	u32 nbsteps, divider, psd2, freq;
	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };

	stv6110_read_regs(fe, regs, 0, 8);
	/*N*/
	divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
	divider += priv->regs[RSTV6110_TUNING1];

	/*R*/
	nbsteps  = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
	/*p*/
	psd2  = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;

	freq = divider * (priv->mclk / 1000);
	freq /= (1 << (nbsteps + psd2));
	freq /= 4;

	*frequency = freq;

	return 0;
}

static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u8 ret = 0x04;
	u32 divider, ref, p, presc, i, result_freq, vco_freq;
	s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
	s32 srate;

	dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
						frequency, priv->mclk);

	/* K = (Reference / 1000000) - 16 */
	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	priv->regs[RSTV6110_CTRL1] |=
				((((priv->mclk / 1000000) - 16) & 0x1f) << 3);

	/* BB_GAIN = db/2 */
	if (fe->ops.set_property && fe->ops.get_property) {
		srate = c->symbol_rate;
		dprintk("%s: Get Frontend parameters: srate=%d\n",
							__func__, srate);
	} else
		srate = 15000000;

	priv->regs[RSTV6110_CTRL2] &= ~0x0f;
	priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f);

	if (frequency <= 1023000) {
		p = 1;
		presc = 0;
	} else if (frequency <= 1300000) {
		p = 1;
		presc = 1;
	} else if (frequency <= 2046000) {
		p = 0;
		presc = 0;
	} else {
		p = 0;
		presc = 1;
	}
	/* DIV4SEL = p*/
	priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
	priv->regs[RSTV6110_TUNING2] |= (p << 4);

	/* PRESC32ON = presc */
	priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
	priv->regs[RSTV6110_TUNING2] |= (presc << 5);

	p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
	for (r_div = 0; r_div <= 3; r_div++) {
		p_calc = (priv->mclk / 100000);
		p_calc /= (1 << (r_div + 1));
		if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
			r_div_opt = r_div;

		p_calc_opt = (priv->mclk / 100000);
		p_calc_opt /= (1 << (r_div_opt + 1));
	}

	ref = priv->mclk / ((1 << (r_div_opt + 1))  * (1 << (p + 1)));
	divider = (((frequency * 1000) + (ref >> 1)) / ref);

	/* RDIV = r_div_opt */
	priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
	priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6);

	/* NDIV_MSB = MSB(divider) */
	priv->regs[RSTV6110_TUNING2] &= ~0x0f;
	priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f);

	/* NDIV_LSB, LSB(divider) */
	priv->regs[RSTV6110_TUNING1] = (divider & 0xff);

	/* CALVCOSTRT = 1 VCO Auto Calibration */
	priv->regs[RSTV6110_STAT1] |= 0x04;
	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
						RSTV6110_CTRL1, 8);

	i = 0;
	/* Wait for CALVCOSTRT == 0 */
	while ((i < 10) && (ret != 0)) {
		ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
		msleep(1); /* wait for VCO auto calibration */
		i++;
	}

	ret = stv6110_read_reg(fe, RSTV6110_STAT1);
	stv6110_get_frequency(fe, &result_freq);

	vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
	dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
						ret, result_freq, vco_freq);

	return 0;
}

static int stv6110_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);

	stv6110_set_frequency(fe, c->frequency);
	stv6110_set_bandwidth(fe, bandwidth);

	return 0;
}

static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct stv6110_priv *priv = fe->tuner_priv;
	u8 r8 = 0;
	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	stv6110_read_regs(fe, regs, 0, 8);

	/* CF */
	r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
	*bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */

	return 0;
}

static const struct dvb_tuner_ops stv6110_tuner_ops = {
	.info = {
		.name = "ST STV6110",
		.frequency_min = 950000,
		.frequency_max = 2150000,
		.frequency_step = 1000,
	},
	.init = stv6110_init,
	.release = stv6110_release,
	.sleep = stv6110_sleep,
	.set_params = stv6110_set_params,
	.get_frequency = stv6110_get_frequency,
	.set_frequency = stv6110_set_frequency,
	.get_bandwidth = stv6110_get_bandwidth,
	.set_bandwidth = stv6110_set_bandwidth,

};

struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
					const struct stv6110_config *config,
					struct i2c_adapter *i2c)
{
	struct stv6110_priv *priv = NULL;
	u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };

	struct i2c_msg msg[] = {
		{
			.addr = config->i2c_address,
			.flags = 0,
			.buf = reg0,
			.len = 9
		}
	};
	int ret;

	/* divisor value for the output clock */
	reg0[2] &= ~0xc0;
	reg0[2] |= (config->clk_div << 6);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	ret = i2c_transfer(i2c, msg, 1);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	if (ret != 1)
		return NULL;

	priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->i2c_address = config->i2c_address;
	priv->i2c = i2c;
	priv->mclk = config->mclk;
	priv->clk_div = config->clk_div;
	priv->gain = config->gain;

	memcpy(&priv->regs, &reg0[1], 8);

	memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
				sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = priv;
	printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);

	return fe;
}
EXPORT_SYMBOL(stv6110_attach);

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

MODULE_DESCRIPTION("ST STV6110 driver");
MODULE_AUTHOR("Igor M. Liplianin");
MODULE_LICENSE("GPL");
Commit	Line	Data
47220bc1 IL	1	/*
	2	* stv6110.c
	3	*
	4	* Driver for ST STV6110 satellite tuner IC.
	5	*
	6	* Copyright (C) 2009 NetUP Inc.
	7	* Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	*
	18	* GNU General Public License for more details.
47220bc1 IL	19	*/
47220bc1 IL	20
5a0e3ad6	21	#include <linux/slab.h>
47220bc1 IL	22	#include <linux/module.h>
	23	#include <linux/dvb/frontend.h>
	24
	25	#include <linux/types.h>
	26
	27	#include "stv6110.h"
	28
8393796d MCC	29	/* Max transfer size done by I2C transfer functions */
	30	#define MAX_XFER_SIZE 64
	31
47220bc1 IL	32	static int debug;
	33
	34	struct stv6110_priv {
	35	int i2c_address;
	36	struct i2c_adapter *i2c;
	37
	38	u32 mclk;
92782bb0	39	u8 clk_div;
873688cd	40	u8 gain;
47220bc1 IL	41	u8 regs[8];
	42	};
	43
	44	#define dprintk(args...) \
	45	do { \
	46	if (debug) \
	47	printk(KERN_DEBUG args); \
	48	} while (0)
	49
	50	static s32 abssub(s32 a, s32 b)
	51	{
	52	if (a > b)
	53	return a - b;
	54	else
	55	return b - a;
	56	};
	57
f2709c20 MCC	58	static void stv6110_release(struct dvb_frontend *fe)
	59	{
	60	kfree(fe->tuner_priv);
	61	fe->tuner_priv = NULL;
	62	}
	63
47220bc1 IL	64	static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
	65	int start, int len)
	66	{
	67	struct stv6110_priv *priv = fe->tuner_priv;
	68	int rc;
8393796d	69	u8 cmdbuf[MAX_XFER_SIZE];
47220bc1 IL	70	struct i2c_msg msg = {
	71	.addr = priv->i2c_address,
	72	.flags = 0,
	73	.buf = cmdbuf,
	74	.len = len + 1
	75	};
	76
	77	dprintk("%s\n", __func__);
	78
8393796d MCC	79	if (1 + len > sizeof(cmdbuf)) {
	80	printk(KERN_WARNING
	81	"%s: i2c wr: len=%d is too big!\n",
	82	KBUILD_MODNAME, len);
	83	return -EINVAL;
	84	}
	85
47220bc1 IL	86	if (start + len > 8)
	87	return -EINVAL;
	88
	89	memcpy(&cmdbuf[1], buf, len);
	90	cmdbuf[0] = start;
	91
	92	if (fe->ops.i2c_gate_ctrl)
	93	fe->ops.i2c_gate_ctrl(fe, 1);
	94
	95	rc = i2c_transfer(priv->i2c, &msg, 1);
	96	if (rc != 1)
	97	dprintk("%s: i2c error\n", __func__);
	98
	99	if (fe->ops.i2c_gate_ctrl)
	100	fe->ops.i2c_gate_ctrl(fe, 0);
	101
	102	return 0;
	103	}
	104
	105	static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
	106	int start, int len)
	107	{
	108	struct stv6110_priv *priv = fe->tuner_priv;
	109	int rc;
	110	u8 reg[] = { start };
c8461210 IL	111	struct i2c_msg msg[] = {
	112	{
	113	.addr = priv->i2c_address,
	114	.flags = 0,
	115	.buf = reg,
	116	.len = 1,
	117	}, {
	118	.addr = priv->i2c_address,
	119	.flags = I2C_M_RD,
	120	.buf = regs,
	121	.len = len,
	122	},
47220bc1 IL	123	};
47220bc1 IL	124
47220bc1 IL	125	if (fe->ops.i2c_gate_ctrl)
	126	fe->ops.i2c_gate_ctrl(fe, 1);
	127
c8461210 IL	128	rc = i2c_transfer(priv->i2c, msg, 2);
c8461210 IL	129	if (rc != 2)
47220bc1 IL	130	dprintk("%s: i2c error\n", __func__);
	131
	132	if (fe->ops.i2c_gate_ctrl)
	133	fe->ops.i2c_gate_ctrl(fe, 0);
	134
	135	memcpy(&priv->regs[start], regs, len);
	136
	137	return 0;
	138	}
	139
	140	static int stv6110_read_reg(struct dvb_frontend *fe, int start)
	141	{
	142	u8 buf[] = { 0 };
	143	stv6110_read_regs(fe, buf, start, 1);
	144
	145	return buf[0];
	146	}
	147
	148	static int stv6110_sleep(struct dvb_frontend *fe)
	149	{
	150	u8 reg[] = { 0 };
	151	stv6110_write_regs(fe, reg, 0, 1);
	152
	153	return 0;
	154	}
	155
0df289a2	156	static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff)
47220bc1 IL	157	{
	158	u32 rlf;
	159
	160	switch (rolloff) {
	161	case ROLLOFF_20:
	162	rlf = 20;
	163	break;
	164	case ROLLOFF_25:
	165	rlf = 25;
	166	break;
	167	default:
	168	rlf = 35;
	169	break;
	170	}
	171
	172	return symbol_rate + ((symbol_rate * rlf) / 100);
	173	}
	174
	175	static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	176	{
	177	struct stv6110_priv *priv = fe->tuner_priv;
	178	u8 r8, ret = 0x04;
	179	int i;
	180
	181	if ((bandwidth / 2) > 36000000) /BW/2 max=31+5=36 mhz for r8=31/
	182	r8 = 31;
	183	else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
	184	r8 = 0;
	185	else /if 5 < BW/2 < 36/
	186	r8 = (bandwidth / 2) / 1000000 - 5;
	187
	188	/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
	189	/* ctrl3, CF = r8 Set the LPF value */
	190	priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) \| 0x1f);
	191	priv->regs[RSTV6110_CTRL3] \|= (r8 & 0x1f);
	192	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	193	/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
	194	priv->regs[RSTV6110_STAT1] \|= 0x02;
	195	stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
	196
	197	i = 0;
	198	/* Wait for CALRCSTRT == 0 */
	199	while ((i < 10) && (ret != 0)) {
	200	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
	201	mdelay(1); /* wait for LPF auto calibration */
	202	i++;
	203	}
	204
	205	/* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
	206	priv->regs[RSTV6110_CTRL3] \|= (1 << 6);
	207	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	208	return 0;
	209	}
	210
	211	static int stv6110_init(struct dvb_frontend *fe)
	212	{
	213	struct stv6110_priv *priv = fe->tuner_priv;
	214	u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
	215
	216	memcpy(priv->regs, buf0, 8);
	217	/* K = (Reference / 1000000) - 16 */
	218	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	219	priv->regs[RSTV6110_CTRL1] \|=
	220	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
221
92782bb0 IL	222	/* divisor value for the output clock */
	223	priv->regs[RSTV6110_CTRL2] &= ~0xc0;
	224	priv->regs[RSTV6110_CTRL2] \|= (priv->clk_div << 6);
	225
47220bc1 IL	226	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
	227	msleep(1);
	228	stv6110_set_bandwidth(fe, 72000000);
	229
	230	return 0;
	231	}
	232
	233	static int stv6110_get_frequency(struct dvb_frontend fe, u32 frequency)
	234	{
	235	struct stv6110_priv *priv = fe->tuner_priv;
	236	u32 nbsteps, divider, psd2, freq;
	237	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	238
	239	stv6110_read_regs(fe, regs, 0, 8);
	240	/N/
	241	divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
	242	divider += priv->regs[RSTV6110_TUNING1];
	243
	244	/R/
	245	nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
	246	/p/
	247	psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
	248
	249	freq = divider * (priv->mclk / 1000);
	250	freq /= (1 << (nbsteps + psd2));
	251	freq /= 4;
	252
	253	*frequency = freq;
	254
	255	return 0;
	256	}
	257
	258	static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
	259	{
	260	struct stv6110_priv *priv = fe->tuner_priv;
	261	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	262	u8 ret = 0x04;
	263	u32 divider, ref, p, presc, i, result_freq, vco_freq;
	264	s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
873688cd	265	s32 srate;
47220bc1 IL	266
	267	dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
	268	frequency, priv->mclk);
	269
	270	/* K = (Reference / 1000000) - 16 */
	271	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	272	priv->regs[RSTV6110_CTRL1] \|=
	273	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
	274
	275	/* BB_GAIN = db/2 */
	276	if (fe->ops.set_property && fe->ops.get_property) {
	277	srate = c->symbol_rate;
	278	dprintk("%s: Get Frontend parameters: srate=%d\n",
	279	__func__, srate);
	280	} else
	281	srate = 15000000;
	282
47220bc1	283	priv->regs[RSTV6110_CTRL2] &= ~0x0f;
873688cd	284	priv->regs[RSTV6110_CTRL2] \|= (priv->gain & 0x0f);
47220bc1 IL	285
	286	if (frequency <= 1023000) {
	287	p = 1;
	288	presc = 0;
	289	} else if (frequency <= 1300000) {
	290	p = 1;
	291	presc = 1;
	292	} else if (frequency <= 2046000) {
	293	p = 0;
	294	presc = 0;
	295	} else {
	296	p = 0;
	297	presc = 1;
	298	}
	299	/* DIV4SEL = p*/
	300	priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
	301	priv->regs[RSTV6110_TUNING2] \|= (p << 4);
	302
	303	/* PRESC32ON = presc */
	304	priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
	305	priv->regs[RSTV6110_TUNING2] \|= (presc << 5);
	306
	307	p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
	308	for (r_div = 0; r_div <= 3; r_div++) {
	309	p_calc = (priv->mclk / 100000);
	310	p_calc /= (1 << (r_div + 1));
	311	if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
	312	r_div_opt = r_div;
	313
	314	p_calc_opt = (priv->mclk / 100000);
	315	p_calc_opt /= (1 << (r_div_opt + 1));
	316	}
	317
	318	ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1)));
	319	divider = (((frequency * 1000) + (ref >> 1)) / ref);
	320
	321	/* RDIV = r_div_opt */
	322	priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
	323	priv->regs[RSTV6110_TUNING2] \|= (((r_div_opt) & 3) << 6);
	324
	325	/* NDIV_MSB = MSB(divider) */
	326	priv->regs[RSTV6110_TUNING2] &= ~0x0f;
	327	priv->regs[RSTV6110_TUNING2] \|= (((divider) >> 8) & 0x0f);
	328
	329	/* NDIV_LSB, LSB(divider) */
	330	priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
	331
	332	/* CALVCOSTRT = 1 VCO Auto Calibration */
	333	priv->regs[RSTV6110_STAT1] \|= 0x04;
	334	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
	335	RSTV6110_CTRL1, 8);
	336
	337	i = 0;
	338	/* Wait for CALVCOSTRT == 0 */
	339	while ((i < 10) && (ret != 0)) {
	340	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
	341	msleep(1); /* wait for VCO auto calibration */
	342	i++;
	343	}
	344
	345	ret = stv6110_read_reg(fe, RSTV6110_STAT1);
	346	stv6110_get_frequency(fe, &result_freq);
	347
	348	vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
349	dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
350	ret, result_freq, vco_freq);
351
352	return 0;
353	}
354
14d24d14	355	static int stv6110_set_params(struct dvb_frontend *fe)
47220bc1 IL	356	{
	357	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	358	u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
	359
	360	stv6110_set_frequency(fe, c->frequency);
	361	stv6110_set_bandwidth(fe, bandwidth);
	362
	363	return 0;
	364	}
	365
	366	static int stv6110_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	367	{
	368	struct stv6110_priv *priv = fe->tuner_priv;
	369	u8 r8 = 0;
	370	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	371	stv6110_read_regs(fe, regs, 0, 8);
	372
	373	/* CF */
	374	r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
	375	bandwidth = (r8 + 5) 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
	376
	377	return 0;
	378	}
	379
14c4bf3c	380	static const struct dvb_tuner_ops stv6110_tuner_ops = {
47220bc1 IL	381	.info = {
	382	.name = "ST STV6110",
	383	.frequency_min = 950000,
	384	.frequency_max = 2150000,
	385	.frequency_step = 1000,
	386	},
	387	.init = stv6110_init,
f2709c20	388	.release = stv6110_release,
47220bc1 IL	389	.sleep = stv6110_sleep,
	390	.set_params = stv6110_set_params,
	391	.get_frequency = stv6110_get_frequency,
	392	.set_frequency = stv6110_set_frequency,
	393	.get_bandwidth = stv6110_get_bandwidth,
	394	.set_bandwidth = stv6110_set_bandwidth,
	395
	396	};
	397
	398	struct dvb_frontend stv6110_attach(struct dvb_frontend fe,
	399	const struct stv6110_config *config,
	400	struct i2c_adapter *i2c)
	401	{
	402	struct stv6110_priv *priv = NULL;
	403	u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
	404
	405	struct i2c_msg msg[] = {
	406	{
	407	.addr = config->i2c_address,
	408	.flags = 0,
	409	.buf = reg0,
	410	.len = 9
	411	}
	412	};
	413	int ret;
	414
92782bb0 IL	415	/* divisor value for the output clock */
	416	reg0[2] &= ~0xc0;
	417	reg0[2] \|= (config->clk_div << 6);
	418
47220bc1 IL	419	if (fe->ops.i2c_gate_ctrl)
	420	fe->ops.i2c_gate_ctrl(fe, 1);
	421
	422	ret = i2c_transfer(i2c, msg, 1);
	423
	424	if (fe->ops.i2c_gate_ctrl)
	425	fe->ops.i2c_gate_ctrl(fe, 0);
	426
	427	if (ret != 1)
	428	return NULL;
	429
	430	priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
	431	if (priv == NULL)
	432	return NULL;
	433
	434	priv->i2c_address = config->i2c_address;
	435	priv->i2c = i2c;
	436	priv->mclk = config->mclk;
92782bb0	437	priv->clk_div = config->clk_div;
873688cd	438	priv->gain = config->gain;
47220bc1 IL	439
	440	memcpy(&priv->regs, &reg0[1], 8);
	441
	442	memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
	443	sizeof(struct dvb_tuner_ops));
	444	fe->tuner_priv = priv;
	445	printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
	446
	447	return fe;
	448	}
	449	EXPORT_SYMBOL(stv6110_attach);
	450
	451	module_param(debug, int, 0644);
	452	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	453
	454	MODULE_DESCRIPTION("ST STV6110 driver");
	455	MODULE_AUTHOR("Igor M. Liplianin");
	456	MODULE_LICENSE("GPL");