[deliverable/linux.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/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 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[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 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
5a0e3ad6	25	#include <linux/slab.h>
47220bc1 IL	26	#include <linux/module.h>
	27	#include <linux/dvb/frontend.h>
	28
	29	#include <linux/types.h>
	30
	31	#include "stv6110.h"
	32
8393796d MCC	33	/* Max transfer size done by I2C transfer functions */
	34	#define MAX_XFER_SIZE 64
	35
47220bc1 IL	36	static int debug;
	37
	38	struct stv6110_priv {
	39	int i2c_address;
	40	struct i2c_adapter *i2c;
	41
	42	u32 mclk;
92782bb0	43	u8 clk_div;
873688cd	44	u8 gain;
47220bc1 IL	45	u8 regs[8];
	46	};
	47
	48	#define dprintk(args...) \
	49	do { \
	50	if (debug) \
	51	printk(KERN_DEBUG args); \
	52	} while (0)
	53
	54	static s32 abssub(s32 a, s32 b)
	55	{
	56	if (a > b)
	57	return a - b;
	58	else
	59	return b - a;
	60	};
	61
	62	static int stv6110_release(struct dvb_frontend *fe)
	63	{
	64	kfree(fe->tuner_priv);
	65	fe->tuner_priv = NULL;
	66	return 0;
	67	}
	68
	69	static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
	70	int start, int len)
	71	{
	72	struct stv6110_priv *priv = fe->tuner_priv;
	73	int rc;
8393796d	74	u8 cmdbuf[MAX_XFER_SIZE];
47220bc1 IL	75	struct i2c_msg msg = {
	76	.addr = priv->i2c_address,
	77	.flags = 0,
	78	.buf = cmdbuf,
	79	.len = len + 1
	80	};
	81
	82	dprintk("%s\n", __func__);
	83
8393796d MCC	84	if (1 + len > sizeof(cmdbuf)) {
	85	printk(KERN_WARNING
	86	"%s: i2c wr: len=%d is too big!\n",
	87	KBUILD_MODNAME, len);
	88	return -EINVAL;
	89	}
	90
47220bc1 IL	91	if (start + len > 8)
	92	return -EINVAL;
	93
	94	memcpy(&cmdbuf[1], buf, len);
	95	cmdbuf[0] = start;
	96
	97	if (fe->ops.i2c_gate_ctrl)
	98	fe->ops.i2c_gate_ctrl(fe, 1);
	99
	100	rc = i2c_transfer(priv->i2c, &msg, 1);
	101	if (rc != 1)
	102	dprintk("%s: i2c error\n", __func__);
	103
	104	if (fe->ops.i2c_gate_ctrl)
	105	fe->ops.i2c_gate_ctrl(fe, 0);
	106
	107	return 0;
	108	}
	109
	110	static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
	111	int start, int len)
	112	{
	113	struct stv6110_priv *priv = fe->tuner_priv;
	114	int rc;
	115	u8 reg[] = { start };
c8461210 IL	116	struct i2c_msg msg[] = {
	117	{
	118	.addr = priv->i2c_address,
	119	.flags = 0,
	120	.buf = reg,
	121	.len = 1,
	122	}, {
	123	.addr = priv->i2c_address,
	124	.flags = I2C_M_RD,
	125	.buf = regs,
	126	.len = len,
	127	},
47220bc1 IL	128	};
47220bc1 IL	129
47220bc1 IL	130	if (fe->ops.i2c_gate_ctrl)
	131	fe->ops.i2c_gate_ctrl(fe, 1);
	132
c8461210 IL	133	rc = i2c_transfer(priv->i2c, msg, 2);
c8461210 IL	134	if (rc != 2)
47220bc1 IL	135	dprintk("%s: i2c error\n", __func__);
	136
	137	if (fe->ops.i2c_gate_ctrl)
	138	fe->ops.i2c_gate_ctrl(fe, 0);
	139
	140	memcpy(&priv->regs[start], regs, len);
	141
	142	return 0;
	143	}
	144
	145	static int stv6110_read_reg(struct dvb_frontend *fe, int start)
	146	{
	147	u8 buf[] = { 0 };
	148	stv6110_read_regs(fe, buf, start, 1);
	149
	150	return buf[0];
	151	}
	152
	153	static int stv6110_sleep(struct dvb_frontend *fe)
	154	{
	155	u8 reg[] = { 0 };
	156	stv6110_write_regs(fe, reg, 0, 1);
	157
	158	return 0;
	159	}
	160
0df289a2	161	static u32 carrier_width(u32 symbol_rate, enum fe_rolloff rolloff)
47220bc1 IL	162	{
	163	u32 rlf;
	164
	165	switch (rolloff) {
	166	case ROLLOFF_20:
	167	rlf = 20;
	168	break;
	169	case ROLLOFF_25:
	170	rlf = 25;
	171	break;
	172	default:
	173	rlf = 35;
	174	break;
	175	}
	176
	177	return symbol_rate + ((symbol_rate * rlf) / 100);
	178	}
	179
	180	static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	181	{
	182	struct stv6110_priv *priv = fe->tuner_priv;
	183	u8 r8, ret = 0x04;
	184	int i;
	185
	186	if ((bandwidth / 2) > 36000000) /BW/2 max=31+5=36 mhz for r8=31/
	187	r8 = 31;
	188	else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
	189	r8 = 0;
	190	else /if 5 < BW/2 < 36/
	191	r8 = (bandwidth / 2) / 1000000 - 5;
	192
	193	/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
	194	/* ctrl3, CF = r8 Set the LPF value */
	195	priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) \| 0x1f);
	196	priv->regs[RSTV6110_CTRL3] \|= (r8 & 0x1f);
	197	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	198	/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
	199	priv->regs[RSTV6110_STAT1] \|= 0x02;
	200	stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
	201
	202	i = 0;
	203	/* Wait for CALRCSTRT == 0 */
	204	while ((i < 10) && (ret != 0)) {
	205	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
	206	mdelay(1); /* wait for LPF auto calibration */
	207	i++;
	208	}
	209
	210	/* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
	211	priv->regs[RSTV6110_CTRL3] \|= (1 << 6);
	212	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
	213	return 0;
	214	}
	215
	216	static int stv6110_init(struct dvb_frontend *fe)
	217	{
	218	struct stv6110_priv *priv = fe->tuner_priv;
	219	u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
	220
	221	memcpy(priv->regs, buf0, 8);
	222	/* K = (Reference / 1000000) - 16 */
	223	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	224	priv->regs[RSTV6110_CTRL1] \|=
	225	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
226
92782bb0 IL	227	/* divisor value for the output clock */
	228	priv->regs[RSTV6110_CTRL2] &= ~0xc0;
	229	priv->regs[RSTV6110_CTRL2] \|= (priv->clk_div << 6);
	230
47220bc1 IL	231	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
	232	msleep(1);
	233	stv6110_set_bandwidth(fe, 72000000);
	234
	235	return 0;
	236	}
	237
	238	static int stv6110_get_frequency(struct dvb_frontend fe, u32 frequency)
	239	{
	240	struct stv6110_priv *priv = fe->tuner_priv;
	241	u32 nbsteps, divider, psd2, freq;
	242	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	243
	244	stv6110_read_regs(fe, regs, 0, 8);
	245	/N/
	246	divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
	247	divider += priv->regs[RSTV6110_TUNING1];
	248
	249	/R/
	250	nbsteps = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
	251	/p/
	252	psd2 = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
	253
	254	freq = divider * (priv->mclk / 1000);
	255	freq /= (1 << (nbsteps + psd2));
	256	freq /= 4;
	257
	258	*frequency = freq;
	259
	260	return 0;
	261	}
	262
	263	static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
	264	{
	265	struct stv6110_priv *priv = fe->tuner_priv;
	266	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	267	u8 ret = 0x04;
	268	u32 divider, ref, p, presc, i, result_freq, vco_freq;
	269	s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
873688cd	270	s32 srate;
47220bc1 IL	271
	272	dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
	273	frequency, priv->mclk);
	274
	275	/* K = (Reference / 1000000) - 16 */
	276	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
	277	priv->regs[RSTV6110_CTRL1] \|=
	278	((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
	279
	280	/* BB_GAIN = db/2 */
	281	if (fe->ops.set_property && fe->ops.get_property) {
	282	srate = c->symbol_rate;
	283	dprintk("%s: Get Frontend parameters: srate=%d\n",
	284	__func__, srate);
	285	} else
	286	srate = 15000000;
	287
47220bc1	288	priv->regs[RSTV6110_CTRL2] &= ~0x0f;
873688cd	289	priv->regs[RSTV6110_CTRL2] \|= (priv->gain & 0x0f);
47220bc1 IL	290
	291	if (frequency <= 1023000) {
	292	p = 1;
	293	presc = 0;
	294	} else if (frequency <= 1300000) {
	295	p = 1;
	296	presc = 1;
	297	} else if (frequency <= 2046000) {
	298	p = 0;
	299	presc = 0;
	300	} else {
	301	p = 0;
	302	presc = 1;
	303	}
	304	/* DIV4SEL = p*/
	305	priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
	306	priv->regs[RSTV6110_TUNING2] \|= (p << 4);
	307
	308	/* PRESC32ON = presc */
	309	priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
	310	priv->regs[RSTV6110_TUNING2] \|= (presc << 5);
	311
	312	p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
	313	for (r_div = 0; r_div <= 3; r_div++) {
	314	p_calc = (priv->mclk / 100000);
	315	p_calc /= (1 << (r_div + 1));
	316	if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
	317	r_div_opt = r_div;
	318
	319	p_calc_opt = (priv->mclk / 100000);
	320	p_calc_opt /= (1 << (r_div_opt + 1));
	321	}
	322
	323	ref = priv->mclk / ((1 << (r_div_opt + 1)) * (1 << (p + 1)));
	324	divider = (((frequency * 1000) + (ref >> 1)) / ref);
	325
	326	/* RDIV = r_div_opt */
	327	priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
	328	priv->regs[RSTV6110_TUNING2] \|= (((r_div_opt) & 3) << 6);
	329
	330	/* NDIV_MSB = MSB(divider) */
	331	priv->regs[RSTV6110_TUNING2] &= ~0x0f;
	332	priv->regs[RSTV6110_TUNING2] \|= (((divider) >> 8) & 0x0f);
	333
	334	/* NDIV_LSB, LSB(divider) */
	335	priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
	336
	337	/* CALVCOSTRT = 1 VCO Auto Calibration */
	338	priv->regs[RSTV6110_STAT1] \|= 0x04;
	339	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
	340	RSTV6110_CTRL1, 8);
	341
	342	i = 0;
	343	/* Wait for CALVCOSTRT == 0 */
	344	while ((i < 10) && (ret != 0)) {
	345	ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
	346	msleep(1); /* wait for VCO auto calibration */
	347	i++;
	348	}
	349
	350	ret = stv6110_read_reg(fe, RSTV6110_STAT1);
	351	stv6110_get_frequency(fe, &result_freq);
	352
	353	vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
354	dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
355	ret, result_freq, vco_freq);
356
357	return 0;
358	}
359
14d24d14	360	static int stv6110_set_params(struct dvb_frontend *fe)
47220bc1 IL	361	{
	362	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	363	u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
	364
	365	stv6110_set_frequency(fe, c->frequency);
	366	stv6110_set_bandwidth(fe, bandwidth);
	367
	368	return 0;
	369	}
	370
	371	static int stv6110_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	372	{
	373	struct stv6110_priv *priv = fe->tuner_priv;
	374	u8 r8 = 0;
	375	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
	376	stv6110_read_regs(fe, regs, 0, 8);
	377
	378	/* CF */
	379	r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
	380	bandwidth = (r8 + 5) 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
	381
	382	return 0;
	383	}
	384
	385	static struct dvb_tuner_ops stv6110_tuner_ops = {
	386	.info = {
	387	.name = "ST STV6110",
	388	.frequency_min = 950000,
	389	.frequency_max = 2150000,
	390	.frequency_step = 1000,
	391	},
	392	.init = stv6110_init,
	393	.release = stv6110_release,
	394	.sleep = stv6110_sleep,
	395	.set_params = stv6110_set_params,
	396	.get_frequency = stv6110_get_frequency,
	397	.set_frequency = stv6110_set_frequency,
	398	.get_bandwidth = stv6110_get_bandwidth,
	399	.set_bandwidth = stv6110_set_bandwidth,
	400
	401	};
	402
	403	struct dvb_frontend stv6110_attach(struct dvb_frontend fe,
	404	const struct stv6110_config *config,
	405	struct i2c_adapter *i2c)
	406	{
	407	struct stv6110_priv *priv = NULL;
	408	u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
	409
	410	struct i2c_msg msg[] = {
	411	{
	412	.addr = config->i2c_address,
	413	.flags = 0,
	414	.buf = reg0,
	415	.len = 9
	416	}
	417	};
	418	int ret;
	419
92782bb0 IL	420	/* divisor value for the output clock */
	421	reg0[2] &= ~0xc0;
	422	reg0[2] \|= (config->clk_div << 6);
	423
47220bc1 IL	424	if (fe->ops.i2c_gate_ctrl)
	425	fe->ops.i2c_gate_ctrl(fe, 1);
	426
	427	ret = i2c_transfer(i2c, msg, 1);
	428
	429	if (fe->ops.i2c_gate_ctrl)
	430	fe->ops.i2c_gate_ctrl(fe, 0);
	431
	432	if (ret != 1)
	433	return NULL;
	434
	435	priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
	436	if (priv == NULL)
	437	return NULL;
	438
	439	priv->i2c_address = config->i2c_address;
	440	priv->i2c = i2c;
	441	priv->mclk = config->mclk;
92782bb0	442	priv->clk_div = config->clk_div;
873688cd	443	priv->gain = config->gain;
47220bc1 IL	444
	445	memcpy(&priv->regs, &reg0[1], 8);
	446
	447	memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
	448	sizeof(struct dvb_tuner_ops));
	449	fe->tuner_priv = priv;
	450	printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
	451
	452	return fe;
	453	}
	454	EXPORT_SYMBOL(stv6110_attach);
	455
	456	module_param(debug, int, 0644);
	457	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	458
	459	MODULE_DESCRIPTION("ST STV6110 driver");
	460	MODULE_AUTHOR("Igor M. Liplianin");
	461	MODULE_LICENSE("GPL");