[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb-frontends / stv6110x.c

/*
	STV6110(A) Silicon tuner driver

	Copyright (C) Manu Abraham <abraham.manu@gmail.com>

	Copyright (C) ST Microelectronics

	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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>

#include "dvb_frontend.h"

#include "stv6110x_reg.h"
#include "stv6110x.h"
#include "stv6110x_priv.h"

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

static unsigned int verbose;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "Set Verbosity level");

static int stv6110x_read_reg(struct stv6110x_state *stv6110x, u8 reg, u8 *data)
{
	int ret;
	const struct stv6110x_config *config = stv6110x->config;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = {
		{ .addr = config->addr, .flags = 0, 	   .buf = b0, .len = 1 },
		{ .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
	};

	ret = i2c_transfer(stv6110x->i2c, msg, 2);
	if (ret != 2) {
		dprintk(FE_ERROR, 1, "I/O Error");
		return -EREMOTEIO;
	}
	*data = b1[0];

	return 0;
}

static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
{
	int ret;
	const struct stv6110x_config *config = stv6110x->config;
	u8 buf[MAX_XFER_SIZE];

	struct i2c_msg msg = {
		.addr = config->addr,
		.flags = 0,
		.buf = buf,
		.len = len + 1
	};

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

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

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

	ret = i2c_transfer(stv6110x->i2c, &msg, 1);
	if (ret != 1) {
		dprintk(FE_ERROR, 1, "I/O Error");
		return -EREMOTEIO;
	}

	return 0;
}

static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
{
	return stv6110x_write_regs(stv6110x, reg, &data, 1);
}

static int stv6110x_init(struct dvb_frontend *fe)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;
	int ret;

	ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
				  ARRAY_SIZE(stv6110x->regs));
	if (ret < 0) {
		dprintk(FE_ERROR, 1, "Initialization failed");
		return -1;
	}

	return 0;
}

static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;
	u32 rDiv, divider;
	s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
	u8 i;

	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));

	if (frequency <= 1023000) {
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
		pVal = 40;
	} else if (frequency <= 1300000) {
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
		pVal = 40;
	} else if (frequency <= 2046000) {
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
		pVal = 20;
	} else {
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
		pVal = 20;
	}

	for (rDiv = 0; rDiv <= 3; rDiv++) {
		pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);

		if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
			rDivOpt = rDiv;

		pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
	}

	divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
	divider = (divider + 5) / 10;

	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));

	/* VCO Auto calibration */
	STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);

	stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
	stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x->regs[STV6110x_TNG1]);
	stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x->regs[STV6110x_TNG0]);
	stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);

	for (i = 0; i < TRIALS; i++) {
		stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
		if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x->regs[STV6110x_STAT1]))
				break;
		msleep(1);
	}

	return 0;
}

static int stv6110x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
	stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);

	*frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x->regs[STV6110x_TNG1]),
				 STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x->regs[STV6110x_TNG0]))) * REFCLOCK_kHz;

	*frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
			     STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));

	*frequency >>= 2;

	return 0;
}

static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;
	u32 halfbw;
	u8 i;

	halfbw = bandwidth >> 1;

	if (halfbw > 36000000)
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
	else if (halfbw < 5000000)
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
	else
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */


	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
	STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */

	stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
	stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);

	for (i = 0; i < TRIALS; i++) {
		stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
		if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x->regs[STV6110x_STAT1]))
			break;
		msleep(1);
	}
	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
	stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);

	return 0;
}

static int stv6110x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
	*bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) * 2000000;

	return 0;
}

static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	/* setup divider */
	switch (refclock) {
	default:
	case 1:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
		break;
	case 2:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
		break;
	case 4:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
		break;
	case 8:
	case 0:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
		break;
	}
	stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);

	return 0;
}

static int stv6110x_get_bbgain(struct dvb_frontend *fe, u32 *gain)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
	*gain = 2 * STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);

	return 0;
}

static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
	stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);

	return 0;
}

static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;
	int ret;

	switch (mode) {
	case TUNER_SLEEP:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 0);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 0);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 0);
		break;

	case TUNER_WAKE:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 1);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 1);
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 1);
		break;
	}

	ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
	if (ret < 0) {
		dprintk(FE_ERROR, 1, "I/O Error");
		return -EIO;
	}

	return 0;
}

static int stv6110x_sleep(struct dvb_frontend *fe)
{
	if (fe->tuner_priv)
		return stv6110x_set_mode(fe, TUNER_SLEEP);

	return 0;
}

static int stv6110x_get_status(struct dvb_frontend *fe, u32 *status)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);

	if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
		*status = TUNER_PHASELOCKED;
	else
		*status = 0;

	return 0;
}


static void stv6110x_release(struct dvb_frontend *fe)
{
	struct stv6110x_state *stv6110x = fe->tuner_priv;

	fe->tuner_priv = NULL;
	kfree(stv6110x);
}

static const struct dvb_tuner_ops stv6110x_ops = {
	.info = {
		.name		= "STV6110(A) Silicon Tuner",
		.frequency_min	=  950000,
		.frequency_max	= 2150000,
		.frequency_step	= 0,
	},
	.release		= stv6110x_release
};

static const struct stv6110x_devctl stv6110x_ctl = {
	.tuner_init		= stv6110x_init,
	.tuner_sleep		= stv6110x_sleep,
	.tuner_set_mode		= stv6110x_set_mode,
	.tuner_set_frequency	= stv6110x_set_frequency,
	.tuner_get_frequency	= stv6110x_get_frequency,
	.tuner_set_bandwidth	= stv6110x_set_bandwidth,
	.tuner_get_bandwidth	= stv6110x_get_bandwidth,
	.tuner_set_bbgain	= stv6110x_set_bbgain,
	.tuner_get_bbgain	= stv6110x_get_bbgain,
	.tuner_set_refclk	= stv6110x_set_refclock,
	.tuner_get_status	= stv6110x_get_status,
};

const struct stv6110x_devctl *stv6110x_attach(struct dvb_frontend *fe,
					const struct stv6110x_config *config,
					struct i2c_adapter *i2c)
{
	struct stv6110x_state *stv6110x;
	u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};

	stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
	if (!stv6110x)
		return NULL;

	stv6110x->i2c		= i2c;
	stv6110x->config	= config;
	stv6110x->devctl	= &stv6110x_ctl;
	memcpy(stv6110x->regs, default_regs, 8);

	/* setup divider */
	switch (stv6110x->config->clk_div) {
	default:
	case 1:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
		break;
	case 2:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
		break;
	case 4:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
		break;
	case 8:
	case 0:
		STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
		break;
	}

	fe->tuner_priv		= stv6110x;
	fe->ops.tuner_ops	= stv6110x_ops;

	printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
	return stv6110x->devctl;
}
EXPORT_SYMBOL(stv6110x_attach);

MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("STV6110x Silicon tuner");
MODULE_LICENSE("GPL");
Commit	Line	Data
	1	/*
	2	STV6110(A) Silicon tuner driver
	3
	4	Copyright (C) Manu Abraham <abraham.manu@gmail.com>
	5
	6	Copyright (C) ST Microelectronics
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*/
	22
	23	#include <linux/init.h>
	24	#include <linux/kernel.h>
	25	#include <linux/module.h>
	26	#include <linux/slab.h>
	27	#include <linux/string.h>
	28
	29	#include "dvb_frontend.h"
	30
	31	#include "stv6110x_reg.h"
	32	#include "stv6110x.h"
	33	#include "stv6110x_priv.h"
	34
	35	/* Max transfer size done by I2C transfer functions */
	36	#define MAX_XFER_SIZE 64
	37
	38	static unsigned int verbose;
	39	module_param(verbose, int, 0644);
	40	MODULE_PARM_DESC(verbose, "Set Verbosity level");
	41
	42	static int stv6110x_read_reg(struct stv6110x_state stv6110x, u8 reg, u8 data)
	43	{
	44	int ret;
	45	const struct stv6110x_config *config = stv6110x->config;
	46	u8 b0[] = { reg };
	47	u8 b1[] = { 0 };
	48	struct i2c_msg msg[] = {
	49	{ .addr = config->addr, .flags = 0, .buf = b0, .len = 1 },
	50	{ .addr = config->addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }
	51	};
	52
	53	ret = i2c_transfer(stv6110x->i2c, msg, 2);
	54	if (ret != 2) {
	55	dprintk(FE_ERROR, 1, "I/O Error");
	56	return -EREMOTEIO;
	57	}
	58	*data = b1[0];
	59
	60	return 0;
	61	}
	62
	63	static int stv6110x_write_regs(struct stv6110x_state *stv6110x, int start, u8 data[], int len)
	64	{
	65	int ret;
	66	const struct stv6110x_config *config = stv6110x->config;
	67	u8 buf[MAX_XFER_SIZE];
	68
	69	struct i2c_msg msg = {
	70	.addr = config->addr,
	71	.flags = 0,
	72	.buf = buf,
	73	.len = len + 1
	74	};
	75
	76	if (1 + len > sizeof(buf)) {
	77	printk(KERN_WARNING
	78	"%s: i2c wr: len=%d is too big!\n",
	79	KBUILD_MODNAME, len);
	80	return -EINVAL;
	81	}
	82
	83	if (start + len > 8)
	84	return -EINVAL;
	85
	86	buf[0] = start;
	87	memcpy(&buf[1], data, len);
	88
	89	ret = i2c_transfer(stv6110x->i2c, &msg, 1);
	90	if (ret != 1) {
	91	dprintk(FE_ERROR, 1, "I/O Error");
	92	return -EREMOTEIO;
	93	}
	94
	95	return 0;
	96	}
	97
	98	static int stv6110x_write_reg(struct stv6110x_state *stv6110x, u8 reg, u8 data)
	99	{
	100	return stv6110x_write_regs(stv6110x, reg, &data, 1);
	101	}
	102
	103	static int stv6110x_init(struct dvb_frontend *fe)
	104	{
	105	struct stv6110x_state *stv6110x = fe->tuner_priv;
	106	int ret;
	107
	108	ret = stv6110x_write_regs(stv6110x, 0, stv6110x->regs,
	109	ARRAY_SIZE(stv6110x->regs));
	110	if (ret < 0) {
	111	dprintk(FE_ERROR, 1, "Initialization failed");
	112	return -1;
	113	}
	114
	115	return 0;
	116	}
	117
	118	static int stv6110x_set_frequency(struct dvb_frontend *fe, u32 frequency)
	119	{
	120	struct stv6110x_state *stv6110x = fe->tuner_priv;
	121	u32 rDiv, divider;
	122	s32 pVal, pCalc, rDivOpt = 0, pCalcOpt = 1000;
	123	u8 i;
	124
	125	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_K, (REFCLOCK_MHz - 16));
	126
	127	if (frequency <= 1023000) {
	128	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
	129	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
	130	pVal = 40;
	131	} else if (frequency <= 1300000) {
	132	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 1);
	133	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
	134	pVal = 40;
	135	} else if (frequency <= 2046000) {
	136	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
	137	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 0);
	138	pVal = 20;
	139	} else {
	140	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_DIV4SEL, 0);
	141	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_PRESC32_ON, 1);
	142	pVal = 20;
	143	}
	144
	145	for (rDiv = 0; rDiv <= 3; rDiv++) {
	146	pCalc = (REFCLOCK_kHz / 100) / R_DIV(rDiv);
	147
	148	if ((abs((s32)(pCalc - pVal))) < (abs((s32)(pCalcOpt - pVal))))
	149	rDivOpt = rDiv;
	150
	151	pCalcOpt = (REFCLOCK_kHz / 100) / R_DIV(rDivOpt);
	152	}
	153
	154	divider = (frequency * R_DIV(rDivOpt) * pVal) / REFCLOCK_kHz;
	155	divider = (divider + 5) / 10;
	156
	157	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_R_DIV, rDivOpt);
	158	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG1], TNG1_N_DIV_11_8, MSB(divider));
	159	STV6110x_SETFIELD(stv6110x->regs[STV6110x_TNG0], TNG0_N_DIV_7_0, LSB(divider));
	160
	161	/* VCO Auto calibration */
	162	STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALVCO_STRT, 1);
	163
	164	stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
	165	stv6110x_write_reg(stv6110x, STV6110x_TNG1, stv6110x->regs[STV6110x_TNG1]);
	166	stv6110x_write_reg(stv6110x, STV6110x_TNG0, stv6110x->regs[STV6110x_TNG0]);
	167	stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
	168
	169	for (i = 0; i < TRIALS; i++) {
	170	stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
	171	if (!STV6110x_GETFIELD(STAT1_CALVCO_STRT, stv6110x->regs[STV6110x_STAT1]))
	172	break;
	173	msleep(1);
	174	}
	175
	176	return 0;
	177	}
	178
	179	static int stv6110x_get_frequency(struct dvb_frontend fe, u32 frequency)
	180	{
	181	struct stv6110x_state *stv6110x = fe->tuner_priv;
	182
	183	stv6110x_read_reg(stv6110x, STV6110x_TNG1, &stv6110x->regs[STV6110x_TNG1]);
	184	stv6110x_read_reg(stv6110x, STV6110x_TNG0, &stv6110x->regs[STV6110x_TNG0]);
	185
	186	*frequency = (MAKEWORD16(STV6110x_GETFIELD(TNG1_N_DIV_11_8, stv6110x->regs[STV6110x_TNG1]),
	187	STV6110x_GETFIELD(TNG0_N_DIV_7_0, stv6110x->regs[STV6110x_TNG0]))) * REFCLOCK_kHz;
	188
	189	*frequency /= (1 << (STV6110x_GETFIELD(TNG1_R_DIV, stv6110x->regs[STV6110x_TNG1]) +
	190	STV6110x_GETFIELD(TNG1_DIV4SEL, stv6110x->regs[STV6110x_TNG1])));
	191
	192	*frequency >>= 2;
	193
	194	return 0;
	195	}
	196
	197	static int stv6110x_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	198	{
	199	struct stv6110x_state *stv6110x = fe->tuner_priv;
	200	u32 halfbw;
	201	u8 i;
	202
	203	halfbw = bandwidth >> 1;
	204
	205	if (halfbw > 36000000)
	206	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 31); /* LPF */
	207	else if (halfbw < 5000000)
	208	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, 0); /* LPF */
	209	else
	210	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_CF, ((halfbw / 1000000) - 5)); /* LPF */
	211
	212
	213	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x0); /* cal. clk activated */
	214	STV6110x_SETFIELD(stv6110x->regs[STV6110x_STAT1], STAT1_CALRC_STRT, 0x1); /* LPF auto cal */
	215
	216	stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
	217	stv6110x_write_reg(stv6110x, STV6110x_STAT1, stv6110x->regs[STV6110x_STAT1]);
	218
	219	for (i = 0; i < TRIALS; i++) {
	220	stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
	221	if (!STV6110x_GETFIELD(STAT1_CALRC_STRT, stv6110x->regs[STV6110x_STAT1]))
	222	break;
	223	msleep(1);
	224	}
	225	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL3], CTRL3_RCCLK_OFF, 0x1); /* cal. done */
	226	stv6110x_write_reg(stv6110x, STV6110x_CTRL3, stv6110x->regs[STV6110x_CTRL3]);
	227
	228	return 0;
	229	}
	230
	231	static int stv6110x_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	232	{
	233	struct stv6110x_state *stv6110x = fe->tuner_priv;
	234
	235	stv6110x_read_reg(stv6110x, STV6110x_CTRL3, &stv6110x->regs[STV6110x_CTRL3]);
	236	bandwidth = (STV6110x_GETFIELD(CTRL3_CF, stv6110x->regs[STV6110x_CTRL3]) + 5) 2000000;
	237
	238	return 0;
	239	}
	240
	241	static int stv6110x_set_refclock(struct dvb_frontend *fe, u32 refclock)
	242	{
	243	struct stv6110x_state *stv6110x = fe->tuner_priv;
	244
	245	/* setup divider */
	246	switch (refclock) {
	247	default:
	248	case 1:
	249	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
	250	break;
	251	case 2:
	252	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
	253	break;
	254	case 4:
	255	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
	256	break;
	257	case 8:
	258	case 0:
	259	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
	260	break;
	261	}
	262	stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
	263
	264	return 0;
	265	}
	266
	267	static int stv6110x_get_bbgain(struct dvb_frontend fe, u32 gain)
	268	{
	269	struct stv6110x_state *stv6110x = fe->tuner_priv;
	270
	271	stv6110x_read_reg(stv6110x, STV6110x_CTRL2, &stv6110x->regs[STV6110x_CTRL2]);
	272	gain = 2 STV6110x_GETFIELD(CTRL2_BBGAIN, stv6110x->regs[STV6110x_CTRL2]);
	273
	274	return 0;
	275	}
	276
	277	static int stv6110x_set_bbgain(struct dvb_frontend *fe, u32 gain)
	278	{
	279	struct stv6110x_state *stv6110x = fe->tuner_priv;
	280
	281	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_BBGAIN, gain / 2);
	282	stv6110x_write_reg(stv6110x, STV6110x_CTRL2, stv6110x->regs[STV6110x_CTRL2]);
	283
	284	return 0;
	285	}
	286
	287	static int stv6110x_set_mode(struct dvb_frontend *fe, enum tuner_mode mode)
	288	{
	289	struct stv6110x_state *stv6110x = fe->tuner_priv;
	290	int ret;
	291
	292	switch (mode) {
	293	case TUNER_SLEEP:
	294	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 0);
	295	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 0);
	296	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 0);
	297	break;
	298
	299	case TUNER_WAKE:
	300	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_SYN, 1);
	301	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_RX, 1);
	302	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL1], CTRL1_LPT, 1);
	303	break;
	304	}
	305
	306	ret = stv6110x_write_reg(stv6110x, STV6110x_CTRL1, stv6110x->regs[STV6110x_CTRL1]);
	307	if (ret < 0) {
	308	dprintk(FE_ERROR, 1, "I/O Error");
	309	return -EIO;
	310	}
	311
	312	return 0;
	313	}
	314
	315	static int stv6110x_sleep(struct dvb_frontend *fe)
	316	{
	317	if (fe->tuner_priv)
	318	return stv6110x_set_mode(fe, TUNER_SLEEP);
	319
	320	return 0;
	321	}
	322
	323	static int stv6110x_get_status(struct dvb_frontend fe, u32 status)
	324	{
	325	struct stv6110x_state *stv6110x = fe->tuner_priv;
	326
	327	stv6110x_read_reg(stv6110x, STV6110x_STAT1, &stv6110x->regs[STV6110x_STAT1]);
	328
	329	if (STV6110x_GETFIELD(STAT1_LOCK, stv6110x->regs[STV6110x_STAT1]))
	330	*status = TUNER_PHASELOCKED;
	331	else
	332	*status = 0;
	333
	334	return 0;
	335	}
	336
	337
	338	static void stv6110x_release(struct dvb_frontend *fe)
	339	{
	340	struct stv6110x_state *stv6110x = fe->tuner_priv;
	341
	342	fe->tuner_priv = NULL;
	343	kfree(stv6110x);
	344	}
	345
	346	static const struct dvb_tuner_ops stv6110x_ops = {
	347	.info = {
	348	.name = "STV6110(A) Silicon Tuner",
	349	.frequency_min = 950000,
	350	.frequency_max = 2150000,
	351	.frequency_step = 0,
	352	},
	353	.release = stv6110x_release
	354	};
	355
	356	static const struct stv6110x_devctl stv6110x_ctl = {
	357	.tuner_init = stv6110x_init,
	358	.tuner_sleep = stv6110x_sleep,
	359	.tuner_set_mode = stv6110x_set_mode,
	360	.tuner_set_frequency = stv6110x_set_frequency,
	361	.tuner_get_frequency = stv6110x_get_frequency,
	362	.tuner_set_bandwidth = stv6110x_set_bandwidth,
	363	.tuner_get_bandwidth = stv6110x_get_bandwidth,
	364	.tuner_set_bbgain = stv6110x_set_bbgain,
	365	.tuner_get_bbgain = stv6110x_get_bbgain,
	366	.tuner_set_refclk = stv6110x_set_refclock,
	367	.tuner_get_status = stv6110x_get_status,
	368	};
	369
	370	const struct stv6110x_devctl stv6110x_attach(struct dvb_frontend fe,
	371	const struct stv6110x_config *config,
	372	struct i2c_adapter *i2c)
	373	{
	374	struct stv6110x_state *stv6110x;
	375	u8 default_regs[] = {0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e};
	376
	377	stv6110x = kzalloc(sizeof (struct stv6110x_state), GFP_KERNEL);
	378	if (!stv6110x)
	379	return NULL;
	380
	381	stv6110x->i2c = i2c;
	382	stv6110x->config = config;
	383	stv6110x->devctl = &stv6110x_ctl;
	384	memcpy(stv6110x->regs, default_regs, 8);
	385
	386	/* setup divider */
	387	switch (stv6110x->config->clk_div) {
	388	default:
	389	case 1:
	390	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 0);
	391	break;
	392	case 2:
	393	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 1);
	394	break;
	395	case 4:
	396	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 2);
	397	break;
	398	case 8:
	399	case 0:
	400	STV6110x_SETFIELD(stv6110x->regs[STV6110x_CTRL2], CTRL2_CO_DIV, 3);
	401	break;
	402	}
	403
	404	fe->tuner_priv = stv6110x;
	405	fe->ops.tuner_ops = stv6110x_ops;
	406
	407	printk(KERN_INFO "%s: Attaching STV6110x\n", __func__);
	408	return stv6110x->devctl;
	409	}
	410	EXPORT_SYMBOL(stv6110x_attach);
	411
	412	MODULE_AUTHOR("Manu Abraham");
	413	MODULE_DESCRIPTION("STV6110x Silicon tuner");
	414	MODULE_LICENSE("GPL");