[deliverable/linux.git] / drivers / media / dvb-frontends / stb6100.c

/*
	STB6100 Silicon Tuner
	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 "stb6100.h"

static unsigned int verbose;
module_param(verbose, int, 0644);


#define FE_ERROR		0
#define FE_NOTICE		1
#define FE_INFO			2
#define FE_DEBUG		3

#define dprintk(x, y, z, format, arg...) do {						\
	if (z) {									\
		if	((x > FE_ERROR) && (x > y))					\
			printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);		\
		else if	((x > FE_NOTICE) && (x > y))					\
			printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);	\
		else if ((x > FE_INFO) && (x > y))					\
			printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);		\
		else if ((x > FE_DEBUG) && (x > y))					\
			printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);	\
	} else {									\
		if (x > y)								\
			printk(format, ##arg);						\
	}										\
} while (0)

struct stb6100_lkup {
	u32 val_low;
	u32 val_high;
	u8   reg;
};

static int stb6100_release(struct dvb_frontend *fe);

static const struct stb6100_lkup lkup[] = {
	{       0,  950000, 0x0a },
	{  950000, 1000000, 0x0a },
	{ 1000000, 1075000, 0x0c },
	{ 1075000, 1200000, 0x00 },
	{ 1200000, 1300000, 0x01 },
	{ 1300000, 1370000, 0x02 },
	{ 1370000, 1470000, 0x04 },
	{ 1470000, 1530000, 0x05 },
	{ 1530000, 1650000, 0x06 },
	{ 1650000, 1800000, 0x08 },
	{ 1800000, 1950000, 0x0a },
	{ 1950000, 2150000, 0x0c },
	{ 2150000, 9999999, 0x0c },
	{       0,       0, 0x00 }
};

/* Register names for easy debugging.	*/
static const char *stb6100_regnames[] = {
	[STB6100_LD]		= "LD",
	[STB6100_VCO]		= "VCO",
	[STB6100_NI]		= "NI",
	[STB6100_NF_LSB]	= "NF",
	[STB6100_K]		= "K",
	[STB6100_G]		= "G",
	[STB6100_F]		= "F",
	[STB6100_DLB]		= "DLB",
	[STB6100_TEST1]		= "TEST1",
	[STB6100_FCCK]		= "FCCK",
	[STB6100_LPEN]		= "LPEN",
	[STB6100_TEST3]		= "TEST3",
};

/* Template for normalisation, i.e. setting unused or undocumented
 * bits as required according to the documentation.
 */
struct stb6100_regmask {
	u8 mask;
	u8 set;
};

static const struct stb6100_regmask stb6100_template[] = {
	[STB6100_LD]		= { 0xff, 0x00 },
	[STB6100_VCO]		= { 0xff, 0x00 },
	[STB6100_NI]		= { 0xff, 0x00 },
	[STB6100_NF_LSB]	= { 0xff, 0x00 },
	[STB6100_K]		= { 0xc7, 0x38 },
	[STB6100_G]		= { 0xef, 0x10 },
	[STB6100_F]		= { 0x1f, 0xc0 },
	[STB6100_DLB]		= { 0x38, 0xc4 },
	[STB6100_TEST1]		= { 0x00, 0x8f },
	[STB6100_FCCK]		= { 0x40, 0x0d },
	[STB6100_LPEN]		= { 0xf0, 0x0b },
	[STB6100_TEST3]		= { 0x00, 0xde },
};

/*
 * Currently unused. Some boards might need it in the future
 */
static inline void stb6100_normalise_regs(u8 regs[])
{
	int i;

	for (i = 0; i < STB6100_NUMREGS; i++)
		regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
}

static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
{
	int rc;
	struct i2c_msg msg = {
		.addr	= state->config->tuner_address,
		.flags	= I2C_M_RD,
		.buf	= regs,
		.len	= STB6100_NUMREGS
	};

	rc = i2c_transfer(state->i2c, &msg, 1);
	if (unlikely(rc != 1)) {
		dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
			state->config->tuner_address, rc);

		return -EREMOTEIO;
	}
	if (unlikely(verbose > FE_DEBUG)) {
		int i;

		dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
		for (i = 0; i < STB6100_NUMREGS; i++)
			dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[i], regs[i]);
	}
	return 0;
}

static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
{
	u8 regs[STB6100_NUMREGS];

	struct i2c_msg msg = {
		.addr	= state->config->tuner_address + reg,
		.flags	= I2C_M_RD,
		.buf	= regs,
		.len	= 1
	};

	i2c_transfer(state->i2c, &msg, 1);

	if (unlikely(reg >= STB6100_NUMREGS)) {
		dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
		return -EINVAL;
	}
	if (unlikely(verbose > FE_DEBUG)) {
		dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
		dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[reg], regs[0]);
	}

	return (unsigned int)regs[0];
}

static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
{
	int rc;
	u8 cmdbuf[len + 1];
	struct i2c_msg msg = {
		.addr	= state->config->tuner_address,
		.flags	= 0,
		.buf	= cmdbuf,
		.len	= len + 1
	};

	if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
		dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
			start, len);
		return -EINVAL;
	}
	memcpy(&cmdbuf[1], buf, len);
	cmdbuf[0] = start;

	if (unlikely(verbose > FE_DEBUG)) {
		int i;

		dprintk(verbose, FE_DEBUG, 1, "    Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
		for (i = 0; i < len; i++)
			dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
	}
	rc = i2c_transfer(state->i2c, &msg, 1);
	if (unlikely(rc != 1)) {
		dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
			(unsigned int)state->config->tuner_address, start, len,	rc);
		return -EREMOTEIO;
	}
	return 0;
}

static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
{
	if (unlikely(reg >= STB6100_NUMREGS)) {
		dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
		return -EREMOTEIO;
	}
	data = (data & stb6100_template[reg].mask) | stb6100_template[reg].set;
	return stb6100_write_reg_range(state, &data, reg, 1);
}


static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
{
	int rc;
	struct stb6100_state *state = fe->tuner_priv;

	rc = stb6100_read_reg(state, STB6100_LD);
	if (rc < 0) {
		dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
		return rc;
	}
	return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
}

static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	int rc;
	u8 f;
	struct stb6100_state *state = fe->tuner_priv;

	rc = stb6100_read_reg(state, STB6100_F);
	if (rc < 0)
		return rc;
	f = rc & STB6100_F_F;

	state->status.bandwidth = (f + 5) * 2000;	/* x2 for ZIF	*/

	*bandwidth = state->bandwidth = state->status.bandwidth * 1000;
	dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
	return 0;
}

static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
{
	u32 tmp;
	int rc;
	struct stb6100_state *state = fe->tuner_priv;

	dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);

	bandwidth /= 2; /* ZIF */

	if (bandwidth >= 36000000)	/* F[4:0] BW/2 max =31+5=36 mhz for F=31	*/
		tmp = 31;
	else if (bandwidth <= 5000000)	/* bw/2 min = 5Mhz for F=0			*/
		tmp = 0;
	else				/* if 5 < bw/2 < 36				*/
		tmp = (bandwidth + 500000) / 1000000 - 5;

	/* Turn on LPF bandwidth setting clock control,
	 * set bandwidth, wait 10ms, turn off.
	 */
	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
	if (rc < 0)
		return rc;
	rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
	if (rc < 0)
		return rc;

	msleep(5);  /*  This is dangerous as another (related) thread may start */

	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	if (rc < 0)
		return rc;

	msleep(10);  /*  This is dangerous as another (related) thread may start */

	return 0;
}

static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	int rc;
	u32 nint, nfrac, fvco;
	int psd2, odiv;
	struct stb6100_state *state = fe->tuner_priv;
	u8 regs[STB6100_NUMREGS];

	rc = stb6100_read_regs(state, regs);
	if (rc < 0)
		return rc;

	odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
	psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
	nint = regs[STB6100_NI];
	nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
	fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
	*frequency = state->frequency = fvco >> (odiv + 1);

	dprintk(verbose, FE_DEBUG, 1,
		"frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
		state->frequency, odiv, psd2, state->reference,	fvco, nint, nfrac);
	return 0;
}


static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
{
	int rc;
	const struct stb6100_lkup *ptr;
	struct stb6100_state *state = fe->tuner_priv;
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;

	u32 srate = 0, fvco, nint, nfrac;
	u8 regs[STB6100_NUMREGS];
	u8 g, psd2, odiv;

	dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");

	if (fe->ops.get_frontend) {
		dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
		fe->ops.get_frontend(fe);
	}
	srate = p->symbol_rate;

	/* Set up tuner cleanly, LPF calibration on */
	rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
	if (rc < 0)
		return rc;  /* allow LPF calibration */

	/* PLL Loop disabled, bias on, VCO on, synth on */
	regs[STB6100_LPEN] = 0xeb;
	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	if (rc < 0)
		return rc;

	/* Program the registers with their data values */

	/* VCO divide ratio (LO divide ratio, VCO prescaler enable).	*/
	if (frequency <= 1075000)
		odiv = 1;
	else
		odiv = 0;

	/* VCO enabled, search clock off as per LL3.7, 3.4.1 */
	regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);

	/* OSM	*/
	for (ptr = lkup;
	     (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
	     ptr++);

	if (ptr->val_high == 0) {
		printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
		return -EINVAL;
	}
	regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
	if (rc < 0)
		return rc;

	if ((frequency > 1075000) && (frequency <= 1325000))
		psd2 = 0;
	else
		psd2 = 1;
	/* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4)			*/
	fvco = frequency << (1 + odiv);
	/* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1)))	*/
	nint = fvco / (state->reference << psd2);
	/* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9	*/
	nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
					 << (9 - psd2), state->reference);

	/* NI */
	regs[STB6100_NI] = nint;
	rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
	if (rc < 0)
		return rc;

	/* NF */
	regs[STB6100_NF_LSB] = nfrac;
	rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
	if (rc < 0)
		return rc;

	/* K */
	regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
	regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
	rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
	if (rc < 0)
		return rc;

	/* G Baseband gain. */
	if (srate >= 15000000)
		g = 9;  /*  +4 dB */
	else if (srate >= 5000000)
		g = 11; /*  +8 dB */
	else
		g = 14; /* +14 dB */

	regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
	regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
	regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */
	rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
	if (rc < 0)
		return rc;

	/* F we don't write as it is set up in BW set */

	/* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
	regs[STB6100_DLB] = 0xcc;
	rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
	if (rc < 0)
		return rc;

	dprintk(verbose, FE_DEBUG, 1,
		"frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
		frequency, srate, (unsigned int)g, (unsigned int)odiv,
		(unsigned int)psd2, state->reference,
		ptr->reg, fvco, nint, nfrac);

	/* Set up the test registers */
	regs[STB6100_TEST1] = 0x8f;
	rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
	if (rc < 0)
		return rc;
	regs[STB6100_TEST3] = 0xde;
	rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
	if (rc < 0)
		return rc;

	/* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
	regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	if (rc < 0)
		return rc;

	msleep(2);

	/* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
	regs[STB6100_VCO] &= ~STB6100_VCO_OCK;		/* VCO fast search		*/
	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
	if (rc < 0)
		return rc;

	msleep(10);  /*  This is dangerous as another (related) thread may start */ /* wait for LO to lock */

	regs[STB6100_VCO] &= ~STB6100_VCO_OSCH;		/* vco search disabled		*/
	regs[STB6100_VCO] |= STB6100_VCO_OCK;		/* search clock off		*/
	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
	if (rc < 0)
		return rc;

	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	if (rc < 0)
		return rc;  /* Stop LPF calibration */

	msleep(10);  /*  This is dangerous as another (related) thread may start */
		     /* wait for stabilisation, (should not be necessary)		*/
	return 0;
}

static int stb6100_sleep(struct dvb_frontend *fe)
{
	/* TODO: power down	*/
	return 0;
}

static int stb6100_init(struct dvb_frontend *fe)
{
	struct stb6100_state *state = fe->tuner_priv;
	struct tuner_state *status = &state->status;

	status->tunerstep	= 125000;
	status->ifreq		= 0;
	status->refclock	= 27000000;	/* Hz	*/
	status->iqsense		= 1;
	status->bandwidth	= 36000;	/* kHz	*/
	state->bandwidth	= status->bandwidth * 1000;	/* Hz	*/
	state->reference	= status->refclock / 1000;	/* kHz	*/

	/* Set default bandwidth. Modified, PN 13-May-10	*/
	return 0;
}

static int stb6100_get_state(struct dvb_frontend *fe,
			     enum tuner_param param,
			     struct tuner_state *state)
{
	switch (param) {
	case DVBFE_TUNER_FREQUENCY:
		stb6100_get_frequency(fe, &state->frequency);
		break;
	case DVBFE_TUNER_TUNERSTEP:
		break;
	case DVBFE_TUNER_IFFREQ:
		break;
	case DVBFE_TUNER_BANDWIDTH:
		stb6100_get_bandwidth(fe, &state->bandwidth);
		break;
	case DVBFE_TUNER_REFCLOCK:
		break;
	default:
		break;
	}

	return 0;
}

static int stb6100_set_state(struct dvb_frontend *fe,
			     enum tuner_param param,
			     struct tuner_state *state)
{
	struct stb6100_state *tstate = fe->tuner_priv;

	switch (param) {
	case DVBFE_TUNER_FREQUENCY:
		stb6100_set_frequency(fe, state->frequency);
		tstate->frequency = state->frequency;
		break;
	case DVBFE_TUNER_TUNERSTEP:
		break;
	case DVBFE_TUNER_IFFREQ:
		break;
	case DVBFE_TUNER_BANDWIDTH:
		stb6100_set_bandwidth(fe, state->bandwidth);
		tstate->bandwidth = state->bandwidth;
		break;
	case DVBFE_TUNER_REFCLOCK:
		break;
	default:
		break;
	}

	return 0;
}

static struct dvb_tuner_ops stb6100_ops = {
	.info = {
		.name			= "STB6100 Silicon Tuner",
		.frequency_min		= 950000,
		.frequency_max		= 2150000,
		.frequency_step		= 0,
	},

	.init		= stb6100_init,
	.sleep          = stb6100_sleep,
	.get_status	= stb6100_get_status,
	.get_state	= stb6100_get_state,
	.set_state	= stb6100_set_state,
	.release	= stb6100_release
};

struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
				    const struct stb6100_config *config,
				    struct i2c_adapter *i2c)
{
	struct stb6100_state *state = NULL;

	state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
	if (!state)
		return NULL;

	state->config		= config;
	state->i2c		= i2c;
	state->frontend		= fe;
	state->reference	= config->refclock / 1000; /* kHz */
	fe->tuner_priv		= state;
	fe->ops.tuner_ops	= stb6100_ops;

	printk("%s: Attaching STB6100 \n", __func__);
	return fe;
}

static int stb6100_release(struct dvb_frontend *fe)
{
	struct stb6100_state *state = fe->tuner_priv;

	fe->tuner_priv = NULL;
	kfree(state);

	return 0;
}

EXPORT_SYMBOL(stb6100_attach);
MODULE_PARM_DESC(verbose, "Set Verbosity level");

MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("STB6100 Silicon tuner");
MODULE_LICENSE("GPL");
Commit	Line	Data
c46b6562 MA	1	/*
	2	STB6100 Silicon Tuner
	3	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
	4
	5	Copyright (C) ST Microelectronics
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/init.h>
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
5a0e3ad6	25	#include <linux/slab.h>
c46b6562 MA	26	#include <linux/string.h>
	27
	28	#include "dvb_frontend.h"
	29	#include "stb6100.h"
	30
	31	static unsigned int verbose;
	32	module_param(verbose, int, 0644);
	33
	34
	35	#define FE_ERROR 0
	36	#define FE_NOTICE 1
	37	#define FE_INFO 2
	38	#define FE_DEBUG 3
	39
	40	#define dprintk(x, y, z, format, arg...) do { \
	41	if (z) { \
	42	if ((x > FE_ERROR) && (x > y)) \
	43	printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
	44	else if ((x > FE_NOTICE) && (x > y)) \
	45	printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
	46	else if ((x > FE_INFO) && (x > y)) \
	47	printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
	48	else if ((x > FE_DEBUG) && (x > y)) \
	49	printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
	50	} else { \
	51	if (x > y) \
	52	printk(format, ##arg); \
	53	} \
f14bfe94	54	} while (0)
c46b6562 MA	55
	56	struct stb6100_lkup {
	57	u32 val_low;
	58	u32 val_high;
	59	u8 reg;
	60	};
	61
	62	static int stb6100_release(struct dvb_frontend *fe);
	63
	64	static const struct stb6100_lkup lkup[] = {
	65	{ 0, 950000, 0x0a },
	66	{ 950000, 1000000, 0x0a },
	67	{ 1000000, 1075000, 0x0c },
	68	{ 1075000, 1200000, 0x00 },
	69	{ 1200000, 1300000, 0x01 },
	70	{ 1300000, 1370000, 0x02 },
	71	{ 1370000, 1470000, 0x04 },
	72	{ 1470000, 1530000, 0x05 },
	73	{ 1530000, 1650000, 0x06 },
	74	{ 1650000, 1800000, 0x08 },
	75	{ 1800000, 1950000, 0x0a },
	76	{ 1950000, 2150000, 0x0c },
	77	{ 2150000, 9999999, 0x0c },
	78	{ 0, 0, 0x00 }
	79	};
	80
	81	/* Register names for easy debugging. */
	82	static const char *stb6100_regnames[] = {
	83	[STB6100_LD] = "LD",
	84	[STB6100_VCO] = "VCO",
	85	[STB6100_NI] = "NI",
	86	[STB6100_NF_LSB] = "NF",
	87	[STB6100_K] = "K",
	88	[STB6100_G] = "G",
	89	[STB6100_F] = "F",
	90	[STB6100_DLB] = "DLB",
	91	[STB6100_TEST1] = "TEST1",
	92	[STB6100_FCCK] = "FCCK",
	93	[STB6100_LPEN] = "LPEN",
	94	[STB6100_TEST3] = "TEST3",
	95	};
	96
	97	/* Template for normalisation, i.e. setting unused or undocumented
	98	* bits as required according to the documentation.
	99	*/
	100	struct stb6100_regmask {
	101	u8 mask;
	102	u8 set;
	103	};
	104
	105	static const struct stb6100_regmask stb6100_template[] = {
	106	[STB6100_LD] = { 0xff, 0x00 },
	107	[STB6100_VCO] = { 0xff, 0x00 },
	108	[STB6100_NI] = { 0xff, 0x00 },
	109	[STB6100_NF_LSB] = { 0xff, 0x00 },
	110	[STB6100_K] = { 0xc7, 0x38 },
	111	[STB6100_G] = { 0xef, 0x10 },
	112	[STB6100_F] = { 0x1f, 0xc0 },
	113	[STB6100_DLB] = { 0x38, 0xc4 },
	114	[STB6100_TEST1] = { 0x00, 0x8f },
	115	[STB6100_FCCK] = { 0x40, 0x0d },
	116	[STB6100_LPEN] = { 0xf0, 0x0b },
	117	[STB6100_TEST3] = { 0x00, 0xde },
	118	};
119
a931910d MCC	120	/*
	121	* Currently unused. Some boards might need it in the future
	122	*/
	123	static inline void stb6100_normalise_regs(u8 regs[])
c46b6562 MA	124	{
	125	int i;
	126
	127	for (i = 0; i < STB6100_NUMREGS; i++)
	128	regs[i] = (regs[i] & stb6100_template[i].mask) \| stb6100_template[i].set;
	129	}
	130
	131	static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
	132	{
	133	int rc;
	134	struct i2c_msg msg = {
	135	.addr = state->config->tuner_address,
	136	.flags = I2C_M_RD,
	137	.buf = regs,
	138	.len = STB6100_NUMREGS
	139	};
	140
c46b6562	141	rc = i2c_transfer(state->i2c, &msg, 1);
c46b6562 MA	142	if (unlikely(rc != 1)) {
	143	dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
	144	state->config->tuner_address, rc);
	145
	146	return -EREMOTEIO;
	147	}
	148	if (unlikely(verbose > FE_DEBUG)) {
	149	int i;
	150
	151	dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
	152	for (i = 0; i < STB6100_NUMREGS; i++)
	153	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
	154	}
	155	return 0;
	156	}
	157
	158	static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
	159	{
	160	u8 regs[STB6100_NUMREGS];
c46b6562	161
f14bfe94 MA	162	struct i2c_msg msg = {
	163	.addr = state->config->tuner_address + reg,
	164	.flags = I2C_M_RD,
	165	.buf = regs,
	166	.len = 1
	167	};
	168
fdf07b02	169	i2c_transfer(state->i2c, &msg, 1);
f14bfe94	170
c46b6562 MA	171	if (unlikely(reg >= STB6100_NUMREGS)) {
	172	dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
	173	return -EINVAL;
	174	}
f14bfe94 MA	175	if (unlikely(verbose > FE_DEBUG)) {
	176	dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
	177	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]);
	178	}
	179
	180	return (unsigned int)regs[0];
c46b6562 MA	181	}
	182
	183	static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
	184	{
	185	int rc;
	186	u8 cmdbuf[len + 1];
	187	struct i2c_msg msg = {
	188	.addr = state->config->tuner_address,
	189	.flags = 0,
	190	.buf = cmdbuf,
	191	.len = len + 1
	192	};
	193
	194	if (unlikely(start < 1 \|\| start + len > STB6100_NUMREGS)) {
	195	dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
	196	start, len);
	197	return -EINVAL;
	198	}
	199	memcpy(&cmdbuf[1], buf, len);
	200	cmdbuf[0] = start;
	201
	202	if (unlikely(verbose > FE_DEBUG)) {
	203	int i;
	204
	205	dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
	206	for (i = 0; i < len; i++)
	207	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
	208	}
c46b6562	209	rc = i2c_transfer(state->i2c, &msg, 1);
c46b6562 MA	210	if (unlikely(rc != 1)) {
	211	dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
	212	(unsigned int)state->config->tuner_address, start, len, rc);
	213	return -EREMOTEIO;
	214	}
	215	return 0;
	216	}
	217
	218	static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
	219	{
	220	if (unlikely(reg >= STB6100_NUMREGS)) {
	221	dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
	222	return -EREMOTEIO;
	223	}
	224	data = (data & stb6100_template[reg].mask) \| stb6100_template[reg].set;
	225	return stb6100_write_reg_range(state, &data, reg, 1);
	226	}
	227
c46b6562 MA	228
	229	static int stb6100_get_status(struct dvb_frontend fe, u32 status)
	230	{
	231	int rc;
	232	struct stb6100_state *state = fe->tuner_priv;
	233
f14bfe94 MA	234	rc = stb6100_read_reg(state, STB6100_LD);
	235	if (rc < 0) {
	236	dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
c46b6562	237	return rc;
f14bfe94	238	}
c46b6562 MA	239	return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
	240	}
	241
	242	static int stb6100_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	243	{
	244	int rc;
	245	u8 f;
	246	struct stb6100_state *state = fe->tuner_priv;
	247
f14bfe94 MA	248	rc = stb6100_read_reg(state, STB6100_F);
f14bfe94 MA	249	if (rc < 0)
c46b6562 MA	250	return rc;
	251	f = rc & STB6100_F_F;
	252
	253	state->status.bandwidth = (f + 5) * 2000; /* x2 for ZIF */
	254
	255	bandwidth = state->bandwidth = state->status.bandwidth 1000;
	256	dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
	257	return 0;
	258	}
	259
	260	static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	261	{
	262	u32 tmp;
	263	int rc;
	264	struct stb6100_state *state = fe->tuner_priv;
	265
89693b7d	266	dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
c46b6562	267
763fbaf6	268	bandwidth /= 2; /* ZIF */
c46b6562	269
89693b7d	270	if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
c46b6562	271	tmp = 31;
89693b7d	272	else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */
c46b6562 MA	273	tmp = 0;
c46b6562 MA	274	else /* if 5 < bw/2 < 36 */
6f6c268b	275	tmp = (bandwidth + 500000) / 1000000 - 5;
c46b6562 MA	276
	277	/* Turn on LPF bandwidth setting clock control,
	278	* set bandwidth, wait 10ms, turn off.
	279	*/
f14bfe94 MA	280	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d \| STB6100_FCCK_FCCK);
f14bfe94 MA	281	if (rc < 0)
c46b6562	282	return rc;
f14bfe94 MA	283	rc = stb6100_write_reg(state, STB6100_F, 0xc0 \| tmp);
f14bfe94 MA	284	if (rc < 0)
c46b6562	285	return rc;
f14bfe94 MA	286
	287	msleep(5); /* This is dangerous as another (related) thread may start */
	288
	289	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	290	if (rc < 0)
c46b6562 MA	291	return rc;
c46b6562 MA	292
f14bfe94 MA	293	msleep(10); /* This is dangerous as another (related) thread may start */
f14bfe94 MA	294
c46b6562 MA	295	return 0;
	296	}
	297
	298	static int stb6100_get_frequency(struct dvb_frontend fe, u32 frequency)
	299	{
	300	int rc;
	301	u32 nint, nfrac, fvco;
	302	int psd2, odiv;
	303	struct stb6100_state *state = fe->tuner_priv;
	304	u8 regs[STB6100_NUMREGS];
	305
f14bfe94 MA	306	rc = stb6100_read_regs(state, regs);
f14bfe94 MA	307	if (rc < 0)
c46b6562 MA	308	return rc;
	309
	310	odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
	311	psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
	312	nint = regs[STB6100_NI];
	313	nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) \| regs[STB6100_NF_LSB];
	314	fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
	315	*frequency = state->frequency = fvco >> (odiv + 1);
	316
	317	dprintk(verbose, FE_DEBUG, 1,
	318	"frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
	319	state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
	320	return 0;
	321	}
	322
	323
	324	static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
	325	{
	326	int rc;
	327	const struct stb6100_lkup *ptr;
	328	struct stb6100_state *state = fe->tuner_priv;
1e73fa5d	329	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
c46b6562 MA	330
	331	u32 srate = 0, fvco, nint, nfrac;
	332	u8 regs[STB6100_NUMREGS];
	333	u8 g, psd2, odiv;
	334
f14bfe94	335	dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
3f400925	336
5135986e	337	if (fe->ops.get_frontend) {
3f400925	338	dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
7c61d80a	339	fe->ops.get_frontend(fe);
c46b6562	340	}
1e73fa5d	341	srate = p->symbol_rate;
c46b6562	342
f14bfe94 MA	343	/* Set up tuner cleanly, LPF calibration on */
	344	rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d \| STB6100_FCCK_FCCK);
	345	if (rc < 0)
	346	return rc; /* allow LPF calibration */
20dafb3b	347
f14bfe94 MA	348	/* PLL Loop disabled, bias on, VCO on, synth on */
	349	regs[STB6100_LPEN] = 0xeb;
	350	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	351	if (rc < 0)
20dafb3b AJ	352	return rc;
20dafb3b AJ	353
f14bfe94	354	/* Program the registers with their data values */
c46b6562 MA	355
	356	/* VCO divide ratio (LO divide ratio, VCO prescaler enable). */
	357	if (frequency <= 1075000)
	358	odiv = 1;
	359	else
	360	odiv = 0;
c46b6562	361
25985edc	362	/* VCO enabled, search clock off as per LL3.7, 3.4.1 */
f14bfe94	363	regs[STB6100_VCO] = 0xe0 \| (odiv << STB6100_VCO_ODIV_SHIFT);
c46b6562 MA	364
	365	/* OSM */
	366	for (ptr = lkup;
	367	(ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
	368	ptr++);
f14bfe94	369
c46b6562 MA	370	if (ptr->val_high == 0) {
	371	printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
	372	return -EINVAL;
	373	}
	374	regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) \| ptr->reg;
f14bfe94 MA	375	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
	376	if (rc < 0)
	377	return rc;
c46b6562	378
f14bfe94 MA	379	if ((frequency > 1075000) && (frequency <= 1325000))
	380	psd2 = 0;
	381	else
	382	psd2 = 1;
c46b6562 MA	383	/* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */
	384	fvco = frequency << (1 + odiv);
	385	/* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */
	386	nint = fvco / (state->reference << psd2);
	387	/* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */
75b697f7	388	nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
f14bfe94 MA	389	<< (9 - psd2), state->reference);
	390
	391	/* NI */
	392	regs[STB6100_NI] = nint;
	393	rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
	394	if (rc < 0)
	395	return rc;
	396
	397	/* NF */
	398	regs[STB6100_NF_LSB] = nfrac;
	399	rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
	400	if (rc < 0)
	401	return rc;
	402
	403	/* K */
	404	regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) \| (psd2 << STB6100_K_PSD2_SHIFT);
	405	regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) \| ((nfrac >> 8) & STB6100_K_NF_MSB);
	406	rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
	407	if (rc < 0)
	408	return rc;
	409
	410	/* G Baseband gain. */
	411	if (srate >= 15000000)
	412	g = 9; /* +4 dB */
	413	else if (srate >= 5000000)
	414	g = 11; /* +8 dB */
	415	else
	416	g = 14; /* +14 dB */
	417
	418	regs[STB6100_G] = (0x10 & ~STB6100_G_G) \| g;
	419	regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
	420	regs[STB6100_G] \|= (1 << 5); /* 2Vp-p Mode */
	421	rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
	422	if (rc < 0)
	423	return rc;
	424
	425	/* F we don't write as it is set up in BW set */
	426
	427	/* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
	428	regs[STB6100_DLB] = 0xcc;
	429	rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
	430	if (rc < 0)
	431	return rc;
	432
c46b6562 MA	433	dprintk(verbose, FE_DEBUG, 1,
	434	"frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
	435	frequency, srate, (unsigned int)g, (unsigned int)odiv,
	436	(unsigned int)psd2, state->reference,
	437	ptr->reg, fvco, nint, nfrac);
c46b6562	438
f14bfe94 MA	439	/* Set up the test registers */
	440	regs[STB6100_TEST1] = 0x8f;
	441	rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
	442	if (rc < 0)
	443	return rc;
	444	regs[STB6100_TEST3] = 0xde;
	445	rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
	446	if (rc < 0)
c46b6562 MA	447	return rc;
c46b6562 MA	448
f14bfe94 MA	449	/* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
	450	regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
	451	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	452	if (rc < 0)
c46b6562 MA	453	return rc;
c46b6562 MA	454
f14bfe94 MA	455	msleep(2);
	456
	457	/* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
c46b6562	458	regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */
f14bfe94 MA	459	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
f14bfe94 MA	460	if (rc < 0)
c46b6562 MA	461	return rc;
c46b6562 MA	462
f14bfe94 MA	463	msleep(10); /* This is dangerous as another (related) thread may start / / wait for LO to lock */
f14bfe94 MA	464
c46b6562 MA	465	regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */
c46b6562 MA	466	regs[STB6100_VCO] \|= STB6100_VCO_OCK; /* search clock off */
f14bfe94 MA	467	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
f14bfe94 MA	468	if (rc < 0)
c46b6562 MA	469	return rc;
c46b6562 MA	470
f14bfe94 MA	471	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	472	if (rc < 0)
	473	return rc; /* Stop LPF calibration */
7e4e8c52	474
f14bfe94 MA	475	msleep(10); /* This is dangerous as another (related) thread may start */
f14bfe94 MA	476	/* wait for stabilisation, (should not be necessary) */
c46b6562 MA	477	return 0;
	478	}
	479
	480	static int stb6100_sleep(struct dvb_frontend *fe)
	481	{
	482	/* TODO: power down */
	483	return 0;
	484	}
	485
	486	static int stb6100_init(struct dvb_frontend *fe)
	487	{
	488	struct stb6100_state *state = fe->tuner_priv;
	489	struct tuner_state *status = &state->status;
	490
	491	status->tunerstep = 125000;
	492	status->ifreq = 0;
	493	status->refclock = 27000000; /* Hz */
	494	status->iqsense = 1;
	495	status->bandwidth = 36000; /* kHz */
26f26fa8	496	state->bandwidth = status->bandwidth * 1000; /* Hz */
c46b6562 MA	497	state->reference = status->refclock / 1000; /* kHz */
c46b6562 MA	498
f14bfe94 MA	499	/* Set default bandwidth. Modified, PN 13-May-10 */
f14bfe94 MA	500	return 0;
c46b6562 MA	501	}
	502
	503	static int stb6100_get_state(struct dvb_frontend *fe,
	504	enum tuner_param param,
	505	struct tuner_state *state)
	506	{
	507	switch (param) {
	508	case DVBFE_TUNER_FREQUENCY:
	509	stb6100_get_frequency(fe, &state->frequency);
	510	break;
	511	case DVBFE_TUNER_TUNERSTEP:
	512	break;
	513	case DVBFE_TUNER_IFFREQ:
	514	break;
	515	case DVBFE_TUNER_BANDWIDTH:
	516	stb6100_get_bandwidth(fe, &state->bandwidth);
	517	break;
	518	case DVBFE_TUNER_REFCLOCK:
	519	break;
	520	default:
	521	break;
	522	}
	523
	524	return 0;
	525	}
	526
	527	static int stb6100_set_state(struct dvb_frontend *fe,
	528	enum tuner_param param,
	529	struct tuner_state *state)
	530	{
	531	struct stb6100_state *tstate = fe->tuner_priv;
	532
	533	switch (param) {
	534	case DVBFE_TUNER_FREQUENCY:
	535	stb6100_set_frequency(fe, state->frequency);
7d8f1e57	536	tstate->frequency = state->frequency;
c46b6562 MA	537	break;
	538	case DVBFE_TUNER_TUNERSTEP:
	539	break;
	540	case DVBFE_TUNER_IFFREQ:
	541	break;
	542	case DVBFE_TUNER_BANDWIDTH:
	543	stb6100_set_bandwidth(fe, state->bandwidth);
7d8f1e57	544	tstate->bandwidth = state->bandwidth;
c46b6562 MA	545	break;
	546	case DVBFE_TUNER_REFCLOCK:
	547	break;
	548	default:
	549	break;
	550	}
	551
	552	return 0;
	553	}
	554
	555	static struct dvb_tuner_ops stb6100_ops = {
	556	.info = {
	557	.name = "STB6100 Silicon Tuner",
	558	.frequency_min = 950000,
	559	.frequency_max = 2150000,
	560	.frequency_step = 0,
	561	},
	562
	563	.init = stb6100_init,
	564	.sleep = stb6100_sleep,
	565	.get_status = stb6100_get_status,
	566	.get_state = stb6100_get_state,
	567	.set_state = stb6100_set_state,
c46b6562 MA	568	.release = stb6100_release
	569	};
	570
	571	struct dvb_frontend stb6100_attach(struct dvb_frontend fe,
2e4e98e7	572	const struct stb6100_config *config,
c46b6562 MA	573	struct i2c_adapter *i2c)
	574	{
	575	struct stb6100_state *state = NULL;
	576
a18d4315	577	state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
e4533e65 PST	578	if (!state)
e4533e65 PST	579	return NULL;
c46b6562 MA	580
	581	state->config = config;
	582	state->i2c = i2c;
	583	state->frontend = fe;
3e3263e6	584	state->reference = config->refclock / 1000; /* kHz */
c46b6562 MA	585	fe->tuner_priv = state;
	586	fe->ops.tuner_ops = stb6100_ops;
	587
3e3263e6	588	printk("%s: Attaching STB6100 \n", __func__);
c46b6562	589	return fe;
c46b6562 MA	590	}
	591
	592	static int stb6100_release(struct dvb_frontend *fe)
	593	{
	594	struct stb6100_state *state = fe->tuner_priv;
	595
	596	fe->tuner_priv = NULL;
c46b6562 MA	597	kfree(state);
	598
	599	return 0;
	600	}
	601
	602	EXPORT_SYMBOL(stb6100_attach);
	603	MODULE_PARM_DESC(verbose, "Set Verbosity level");
	604
	605	MODULE_AUTHOR("Manu Abraham");
	606	MODULE_DESCRIPTION("STB6100 Silicon tuner");
	607	MODULE_LICENSE("GPL");