[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.
 *
 * 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/dvb/frontend.h>

#include <linux/types.h>

#include "stv6110.h"

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 int stv6110_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

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[len + 1];
	struct i2c_msg msg = {
		.addr	= priv->i2c_address,
		.flags	= 0,
		.buf	= cmdbuf,
		.len	= len + 1
	};

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

	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, fe_rolloff_t 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 dvb_frontend_parameters *params)
{
	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 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.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/dvb/frontend.h>
	27
	28	#include <linux/types.h>
	29
	30	#include "stv6110.h"
	31
	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
	58	static int stv6110_release(struct dvb_frontend *fe)
	59	{
	60	kfree(fe->tuner_priv);
	61	fe->tuner_priv = NULL;
	62	return 0;
	63	}
	64
	65	static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
	66	int start, int len)
	67	{
	68	struct stv6110_priv *priv = fe->tuner_priv;
	69	int rc;
	70	u8 cmdbuf[len + 1];
	71	struct i2c_msg msg = {
	72	.addr = priv->i2c_address,
	73	.flags = 0,
	74	.buf = cmdbuf,
	75	.len = len + 1
	76	};
	77
	78	dprintk("%s\n", __func__);
	79
	80	if (start + len > 8)
	81	return -EINVAL;
	82
	83	memcpy(&cmdbuf[1], buf, len);
	84	cmdbuf[0] = start;
	85
	86	if (fe->ops.i2c_gate_ctrl)
	87	fe->ops.i2c_gate_ctrl(fe, 1);
	88
	89	rc = i2c_transfer(priv->i2c, &msg, 1);
	90	if (rc != 1)
	91	dprintk("%s: i2c error\n", __func__);
	92
	93	if (fe->ops.i2c_gate_ctrl)
	94	fe->ops.i2c_gate_ctrl(fe, 0);
	95
	96	return 0;
	97	}
	98
	99	static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
	100	int start, int len)
	101	{
	102	struct stv6110_priv *priv = fe->tuner_priv;
	103	int rc;
	104	u8 reg[] = { start };
c8461210 IL	105	struct i2c_msg msg[] = {
	106	{
	107	.addr = priv->i2c_address,
	108	.flags = 0,
	109	.buf = reg,
	110	.len = 1,
	111	}, {
	112	.addr = priv->i2c_address,
	113	.flags = I2C_M_RD,
	114	.buf = regs,
	115	.len = len,
	116	},
47220bc1 IL	117	};
47220bc1 IL	118
47220bc1 IL	119	if (fe->ops.i2c_gate_ctrl)
	120	fe->ops.i2c_gate_ctrl(fe, 1);
	121
c8461210 IL	122	rc = i2c_transfer(priv->i2c, msg, 2);
c8461210 IL	123	if (rc != 2)
47220bc1 IL	124	dprintk("%s: i2c error\n", __func__);
	125
	126	if (fe->ops.i2c_gate_ctrl)
	127	fe->ops.i2c_gate_ctrl(fe, 0);
	128
	129	memcpy(&priv->regs[start], regs, len);
	130
	131	return 0;
	132	}
	133
	134	static int stv6110_read_reg(struct dvb_frontend *fe, int start)
	135	{
	136	u8 buf[] = { 0 };
	137	stv6110_read_regs(fe, buf, start, 1);
	138
	139	return buf[0];
	140	}
	141
	142	static int stv6110_sleep(struct dvb_frontend *fe)
	143	{
	144	u8 reg[] = { 0 };
	145	stv6110_write_regs(fe, reg, 0, 1);
	146
	147	return 0;
	148	}
	149
	150	static u32 carrier_width(u32 symbol_rate, fe_rolloff_t rolloff)
	151	{
	152	u32 rlf;
	153
	154	switch (rolloff) {
	155	case ROLLOFF_20:
	156	rlf = 20;
	157	break;
	158	case ROLLOFF_25:
	159	rlf = 25;
	160	break;
	161	default:
	162	rlf = 35;
	163	break;
	164	}
	165
	166	return symbol_rate + ((symbol_rate * rlf) / 100);
	167	}
	168
	169	static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	170	{
	171	struct stv6110_priv *priv = fe->tuner_priv;
	172	u8 r8, ret = 0x04;
	173	int i;
	174
	175	if ((bandwidth / 2) > 36000000) /BW/2 max=31+5=36 mhz for r8=31/
	176	r8 = 31;
	177	else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
	178	r8 = 0;
	179	else /if 5 < BW/2 < 36/
	180	r8 = (bandwidth / 2) / 1000000 - 5;
	181
	182	/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
	183	/* ctrl3, CF = r8 Set the LPF value */
	184	priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) \| 0x1f);
	185	priv->regs[RSTV6110_CTRL3] \|= (r8 & 0x1f);
	186	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	187	/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
188	priv->regs[RSTV6110_STAT1] \|= 0x02;
189	stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
190
191	i = 0;
192	/* Wait for CALRCSTRT == 0 */
193	while ((i < 10) && (ret != 0)) {
194	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
195	mdelay(1); /* wait for LPF auto calibration */
196	i++;
197	}
198
199	/* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
200	priv->regs[RSTV6110_CTRL3] \|= (1 << 6);
201	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
202	return 0;
203	}
204
205	static int stv6110_init(struct dvb_frontend *fe)
206	{
207	struct stv6110_priv *priv = fe->tuner_priv;
208	u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
209
210	memcpy(priv->regs, buf0, 8);
211	/* K = (Reference / 1000000) - 16 */
212	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
213	priv->regs[RSTV6110_CTRL1] \|=
214	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
215
92782bb0 IL	216	/* divisor value for the output clock */
	217	priv->regs[RSTV6110_CTRL2] &= ~0xc0;
	218	priv->regs[RSTV6110_CTRL2] \|= (priv->clk_div << 6);
	219
47220bc1 IL	220	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
	221	msleep(1);
	222	stv6110_set_bandwidth(fe, 72000000);
	223
	224	return 0;
	225	}
	226
	227	static int stv6110_get_frequency(struct dvb_frontend fe, u32 frequency)
	228	{
	229	struct stv6110_priv *priv = fe->tuner_priv;
	230	u32 nbsteps, divider, psd2, freq;
	231	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	232
	233	stv6110_read_regs(fe, regs, 0, 8);
	234	/N/
	235	divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
	236	divider += priv->regs[RSTV6110_TUNING1];
	237
	238	/R/
	239	nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
	240	/p/
	241	psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
	242
	243	freq = divider * (priv->mclk / 1000);
	244	freq /= (1 << (nbsteps + psd2));
	245	freq /= 4;
	246
	247	*frequency = freq;
	248
	249	return 0;
	250	}
	251
	252	static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
	253	{
	254	struct stv6110_priv *priv = fe->tuner_priv;
	255	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	256	u8 ret = 0x04;
	257	u32 divider, ref, p, presc, i, result_freq, vco_freq;
	258	s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
873688cd	259	s32 srate;
47220bc1 IL	260
	261	dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
	262	frequency, priv->mclk);
	263
	264	/* K = (Reference / 1000000) - 16 */
	265	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	266	priv->regs[RSTV6110_CTRL1] \|=
	267	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
	268
	269	/* BB_GAIN = db/2 */
	270	if (fe->ops.set_property && fe->ops.get_property) {
	271	srate = c->symbol_rate;
	272	dprintk("%s: Get Frontend parameters: srate=%d\n",
	273	__func__, srate);
	274	} else
	275	srate = 15000000;
	276
47220bc1	277	priv->regs[RSTV6110_CTRL2] &= ~0x0f;
873688cd	278	priv->regs[RSTV6110_CTRL2] \|= (priv->gain & 0x0f);
47220bc1 IL	279
	280	if (frequency <= 1023000) {
	281	p = 1;
	282	presc = 0;
	283	} else if (frequency <= 1300000) {
	284	p = 1;
	285	presc = 1;
	286	} else if (frequency <= 2046000) {
	287	p = 0;
	288	presc = 0;
	289	} else {
	290	p = 0;
	291	presc = 1;
	292	}
	293	/* DIV4SEL = p*/
	294	priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
	295	priv->regs[RSTV6110_TUNING2] \|= (p << 4);
	296
	297	/* PRESC32ON = presc */
	298	priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
	299	priv->regs[RSTV6110_TUNING2] \|= (presc << 5);
	300
	301	p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
	302	for (r_div = 0; r_div <= 3; r_div++) {
	303	p_calc = (priv->mclk / 100000);
	304	p_calc /= (1 << (r_div + 1));
	305	if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
	306	r_div_opt = r_div;
	307
	308	p_calc_opt = (priv->mclk / 100000);
	309	p_calc_opt /= (1 << (r_div_opt + 1));
	310	}
	311
	312	ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1)));
	313	divider = (((frequency * 1000) + (ref >> 1)) / ref);
	314
	315	/* RDIV = r_div_opt */
	316	priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
	317	priv->regs[RSTV6110_TUNING2] \|= (((r_div_opt) & 3) << 6);
	318
	319	/* NDIV_MSB = MSB(divider) */
	320	priv->regs[RSTV6110_TUNING2] &= ~0x0f;
	321	priv->regs[RSTV6110_TUNING2] \|= (((divider) >> 8) & 0x0f);
	322
	323	/* NDIV_LSB, LSB(divider) */
	324	priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
	325
	326	/* CALVCOSTRT = 1 VCO Auto Calibration */
	327	priv->regs[RSTV6110_STAT1] \|= 0x04;
	328	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
	329	RSTV6110_CTRL1, 8);
	330
	331	i = 0;
	332	/* Wait for CALVCOSTRT == 0 */
	333	while ((i < 10) && (ret != 0)) {
	334	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
	335	msleep(1); /* wait for VCO auto calibration */
	336	i++;
	337	}
	338
	339	ret = stv6110_read_reg(fe, RSTV6110_STAT1);
	340	stv6110_get_frequency(fe, &result_freq);
	341
	342	vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
343	dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
344	ret, result_freq, vco_freq);
345
346	return 0;
347	}
348
349	static int stv6110_set_params(struct dvb_frontend *fe,
350	struct dvb_frontend_parameters *params)
351	{
352	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
353	u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
354
355	stv6110_set_frequency(fe, c->frequency);
356	stv6110_set_bandwidth(fe, bandwidth);
357
358	return 0;
359	}
360
361	static int stv6110_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
362	{
363	struct stv6110_priv *priv = fe->tuner_priv;
364	u8 r8 = 0;
365	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
366	stv6110_read_regs(fe, regs, 0, 8);
367
368	/* CF */
369	r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
370	bandwidth = (r8 + 5) 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
371
372	return 0;
373	}
374
375	static struct dvb_tuner_ops stv6110_tuner_ops = {
376	.info = {
377	.name = "ST STV6110",
378	.frequency_min = 950000,
379	.frequency_max = 2150000,
380	.frequency_step = 1000,
381	},
382	.init = stv6110_init,
383	.release = stv6110_release,
384	.sleep = stv6110_sleep,
385	.set_params = stv6110_set_params,
386	.get_frequency = stv6110_get_frequency,
387	.set_frequency = stv6110_set_frequency,
388	.get_bandwidth = stv6110_get_bandwidth,
389	.set_bandwidth = stv6110_set_bandwidth,
390
391	};
392
393	struct dvb_frontend stv6110_attach(struct dvb_frontend fe,
394	const struct stv6110_config *config,
395	struct i2c_adapter *i2c)
396	{
397	struct stv6110_priv *priv = NULL;
398	u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
399
400	struct i2c_msg msg[] = {
401	{
402	.addr = config->i2c_address,
403	.flags = 0,
404	.buf = reg0,
405	.len = 9
406	}
407	};
408	int ret;
409
92782bb0 IL	410	/* divisor value for the output clock */
	411	reg0[2] &= ~0xc0;
	412	reg0[2] \|= (config->clk_div << 6);
	413
47220bc1 IL	414	if (fe->ops.i2c_gate_ctrl)
	415	fe->ops.i2c_gate_ctrl(fe, 1);
	416
	417	ret = i2c_transfer(i2c, msg, 1);
	418
	419	if (fe->ops.i2c_gate_ctrl)
	420	fe->ops.i2c_gate_ctrl(fe, 0);
	421
	422	if (ret != 1)
	423	return NULL;
	424
	425	priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
	426	if (priv == NULL)
	427	return NULL;
	428
	429	priv->i2c_address = config->i2c_address;
	430	priv->i2c = i2c;
	431	priv->mclk = config->mclk;
92782bb0	432	priv->clk_div = config->clk_div;
873688cd	433	priv->gain = config->gain;
47220bc1 IL	434
	435	memcpy(&priv->regs, &reg0[1], 8);
	436
	437	memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
	438	sizeof(struct dvb_tuner_ops));
	439	fe->tuner_priv = priv;
	440	printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
	441
	442	return fe;
	443	}
	444	EXPORT_SYMBOL(stv6110_attach);
	445
	446	module_param(debug, int, 0644);
	447	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	448
	449	MODULE_DESCRIPTION("ST STV6110 driver");
	450	MODULE_AUTHOR("Igor M. Liplianin");
	451	MODULE_LICENSE("GPL");