[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 },
};

static 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];
	int rc;

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

	rc = 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 dvb_frontend_parameters p;

	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, &p);
	}
	srate = p.u.qpsk.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, seach 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 == NULL)
		goto error;

	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;

error:
	kfree(state);
	return NULL;
}

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
120	static void stb6100_normalise_regs(u8 regs[])
121	{
122	int i;
123
124	for (i = 0; i < STB6100_NUMREGS; i++)
125	regs[i] = (regs[i] & stb6100_template[i].mask) \| stb6100_template[i].set;
126	}
127
128	static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
129	{
130	int rc;
131	struct i2c_msg msg = {
132	.addr = state->config->tuner_address,
133	.flags = I2C_M_RD,
134	.buf = regs,
135	.len = STB6100_NUMREGS
136	};
137
c46b6562	138	rc = i2c_transfer(state->i2c, &msg, 1);
c46b6562 MA	139	if (unlikely(rc != 1)) {
	140	dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
	141	state->config->tuner_address, rc);
	142
	143	return -EREMOTEIO;
	144	}
	145	if (unlikely(verbose > FE_DEBUG)) {
	146	int i;
	147
	148	dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
	149	for (i = 0; i < STB6100_NUMREGS; i++)
	150	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
	151	}
	152	return 0;
	153	}
	154
	155	static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
	156	{
	157	u8 regs[STB6100_NUMREGS];
	158	int rc;
	159
f14bfe94 MA	160	struct i2c_msg msg = {
	161	.addr = state->config->tuner_address + reg,
	162	.flags = I2C_M_RD,
	163	.buf = regs,
	164	.len = 1
	165	};
	166
	167	rc = i2c_transfer(state->i2c, &msg, 1);
	168
c46b6562 MA	169	if (unlikely(reg >= STB6100_NUMREGS)) {
	170	dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
	171	return -EINVAL;
	172	}
f14bfe94 MA	173	if (unlikely(verbose > FE_DEBUG)) {
	174	dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
	175	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]);
	176	}
	177
	178	return (unsigned int)regs[0];
c46b6562 MA	179	}
	180
	181	static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
	182	{
	183	int rc;
	184	u8 cmdbuf[len + 1];
	185	struct i2c_msg msg = {
	186	.addr = state->config->tuner_address,
	187	.flags = 0,
	188	.buf = cmdbuf,
	189	.len = len + 1
	190	};
	191
	192	if (unlikely(start < 1 \|\| start + len > STB6100_NUMREGS)) {
	193	dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
	194	start, len);
	195	return -EINVAL;
	196	}
	197	memcpy(&cmdbuf[1], buf, len);
	198	cmdbuf[0] = start;
	199
	200	if (unlikely(verbose > FE_DEBUG)) {
	201	int i;
	202
	203	dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
	204	for (i = 0; i < len; i++)
	205	dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
	206	}
c46b6562	207	rc = i2c_transfer(state->i2c, &msg, 1);
c46b6562 MA	208	if (unlikely(rc != 1)) {
	209	dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
	210	(unsigned int)state->config->tuner_address, start, len, rc);
	211	return -EREMOTEIO;
	212	}
	213	return 0;
	214	}
	215
	216	static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
	217	{
	218	if (unlikely(reg >= STB6100_NUMREGS)) {
	219	dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
	220	return -EREMOTEIO;
	221	}
	222	data = (data & stb6100_template[reg].mask) \| stb6100_template[reg].set;
	223	return stb6100_write_reg_range(state, &data, reg, 1);
	224	}
	225
c46b6562 MA	226
	227	static int stb6100_get_status(struct dvb_frontend fe, u32 status)
	228	{
	229	int rc;
	230	struct stb6100_state *state = fe->tuner_priv;
	231
f14bfe94 MA	232	rc = stb6100_read_reg(state, STB6100_LD);
	233	if (rc < 0) {
	234	dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
c46b6562	235	return rc;
f14bfe94	236	}
c46b6562 MA	237	return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
	238	}
	239
	240	static int stb6100_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	241	{
	242	int rc;
	243	u8 f;
	244	struct stb6100_state *state = fe->tuner_priv;
	245
f14bfe94 MA	246	rc = stb6100_read_reg(state, STB6100_F);
f14bfe94 MA	247	if (rc < 0)
c46b6562 MA	248	return rc;
	249	f = rc & STB6100_F_F;
	250
	251	state->status.bandwidth = (f + 5) * 2000; /* x2 for ZIF */
	252
	253	bandwidth = state->bandwidth = state->status.bandwidth 1000;
	254	dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
	255	return 0;
	256	}
	257
	258	static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
	259	{
	260	u32 tmp;
	261	int rc;
	262	struct stb6100_state *state = fe->tuner_priv;
	263
89693b7d	264	dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
c46b6562	265
763fbaf6	266	bandwidth /= 2; /* ZIF */
c46b6562	267
89693b7d	268	if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
c46b6562	269	tmp = 31;
89693b7d	270	else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */
c46b6562 MA	271	tmp = 0;
c46b6562 MA	272	else /* if 5 < bw/2 < 36 */
6f6c268b	273	tmp = (bandwidth + 500000) / 1000000 - 5;
c46b6562 MA	274
	275	/* Turn on LPF bandwidth setting clock control,
	276	* set bandwidth, wait 10ms, turn off.
	277	*/
f14bfe94 MA	278	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d \| STB6100_FCCK_FCCK);
f14bfe94 MA	279	if (rc < 0)
c46b6562	280	return rc;
f14bfe94 MA	281	rc = stb6100_write_reg(state, STB6100_F, 0xc0 \| tmp);
f14bfe94 MA	282	if (rc < 0)
c46b6562	283	return rc;
f14bfe94 MA	284
	285	msleep(5); /* This is dangerous as another (related) thread may start */
	286
	287	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	288	if (rc < 0)
c46b6562 MA	289	return rc;
c46b6562 MA	290
f14bfe94 MA	291	msleep(10); /* This is dangerous as another (related) thread may start */
f14bfe94 MA	292
c46b6562 MA	293	return 0;
	294	}
	295
	296	static int stb6100_get_frequency(struct dvb_frontend fe, u32 frequency)
	297	{
	298	int rc;
	299	u32 nint, nfrac, fvco;
	300	int psd2, odiv;
	301	struct stb6100_state *state = fe->tuner_priv;
	302	u8 regs[STB6100_NUMREGS];
	303
f14bfe94 MA	304	rc = stb6100_read_regs(state, regs);
f14bfe94 MA	305	if (rc < 0)
c46b6562 MA	306	return rc;
	307
	308	odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
	309	psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
	310	nint = regs[STB6100_NI];
	311	nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) \| regs[STB6100_NF_LSB];
	312	fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
	313	*frequency = state->frequency = fvco >> (odiv + 1);
	314
	315	dprintk(verbose, FE_DEBUG, 1,
	316	"frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
	317	state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
	318	return 0;
	319	}
	320
	321
	322	static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
	323	{
	324	int rc;
	325	const struct stb6100_lkup *ptr;
	326	struct stb6100_state *state = fe->tuner_priv;
3f400925	327	struct dvb_frontend_parameters p;
c46b6562 MA	328
	329	u32 srate = 0, fvco, nint, nfrac;
	330	u8 regs[STB6100_NUMREGS];
	331	u8 g, psd2, odiv;
	332
f14bfe94	333	dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
3f400925 MA	334
	335	if (fe->ops.get_frontend) {
	336	dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
	337	fe->ops.get_frontend(fe, &p);
c46b6562	338	}
3f400925	339	srate = p.u.qpsk.symbol_rate;
c46b6562	340
f14bfe94 MA	341	/* Set up tuner cleanly, LPF calibration on */
	342	rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d \| STB6100_FCCK_FCCK);
	343	if (rc < 0)
	344	return rc; /* allow LPF calibration */
20dafb3b	345
f14bfe94 MA	346	/* PLL Loop disabled, bias on, VCO on, synth on */
	347	regs[STB6100_LPEN] = 0xeb;
	348	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	349	if (rc < 0)
20dafb3b AJ	350	return rc;
20dafb3b AJ	351
f14bfe94	352	/* Program the registers with their data values */
c46b6562 MA	353
	354	/* VCO divide ratio (LO divide ratio, VCO prescaler enable). */
	355	if (frequency <= 1075000)
	356	odiv = 1;
	357	else
	358	odiv = 0;
c46b6562	359
f14bfe94 MA	360	/* VCO enabled, seach clock off as per LL3.7, 3.4.1 */
f14bfe94 MA	361	regs[STB6100_VCO] = 0xe0 \| (odiv << STB6100_VCO_ODIV_SHIFT);
c46b6562 MA	362
	363	/* OSM */
	364	for (ptr = lkup;
	365	(ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
	366	ptr++);
f14bfe94	367
c46b6562 MA	368	if (ptr->val_high == 0) {
	369	printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
	370	return -EINVAL;
	371	}
	372	regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) \| ptr->reg;
f14bfe94 MA	373	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
	374	if (rc < 0)
	375	return rc;
c46b6562	376
f14bfe94 MA	377	if ((frequency > 1075000) && (frequency <= 1325000))
	378	psd2 = 0;
	379	else
	380	psd2 = 1;
c46b6562 MA	381	/* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */
	382	fvco = frequency << (1 + odiv);
	383	/* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */
	384	nint = fvco / (state->reference << psd2);
	385	/* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */
75b697f7	386	nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
f14bfe94 MA	387	<< (9 - psd2), state->reference);
	388
	389	/* NI */
	390	regs[STB6100_NI] = nint;
	391	rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
	392	if (rc < 0)
	393	return rc;
	394
	395	/* NF */
	396	regs[STB6100_NF_LSB] = nfrac;
	397	rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
	398	if (rc < 0)
	399	return rc;
	400
	401	/* K */
	402	regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) \| (psd2 << STB6100_K_PSD2_SHIFT);
	403	regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) \| ((nfrac >> 8) & STB6100_K_NF_MSB);
	404	rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
	405	if (rc < 0)
	406	return rc;
	407
	408	/* G Baseband gain. */
	409	if (srate >= 15000000)
	410	g = 9; /* +4 dB */
	411	else if (srate >= 5000000)
	412	g = 11; /* +8 dB */
	413	else
	414	g = 14; /* +14 dB */
	415
	416	regs[STB6100_G] = (0x10 & ~STB6100_G_G) \| g;
	417	regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
	418	regs[STB6100_G] \|= (1 << 5); /* 2Vp-p Mode */
	419	rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
	420	if (rc < 0)
	421	return rc;
	422
	423	/* F we don't write as it is set up in BW set */
	424
	425	/* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
	426	regs[STB6100_DLB] = 0xcc;
	427	rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
	428	if (rc < 0)
	429	return rc;
	430
c46b6562 MA	431	dprintk(verbose, FE_DEBUG, 1,
	432	"frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
	433	frequency, srate, (unsigned int)g, (unsigned int)odiv,
	434	(unsigned int)psd2, state->reference,
	435	ptr->reg, fvco, nint, nfrac);
c46b6562	436
f14bfe94 MA	437	/* Set up the test registers */
	438	regs[STB6100_TEST1] = 0x8f;
	439	rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
	440	if (rc < 0)
	441	return rc;
	442	regs[STB6100_TEST3] = 0xde;
	443	rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
	444	if (rc < 0)
c46b6562 MA	445	return rc;
c46b6562 MA	446
f14bfe94 MA	447	/* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
	448	regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
	449	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
	450	if (rc < 0)
c46b6562 MA	451	return rc;
c46b6562 MA	452
f14bfe94 MA	453	msleep(2);
	454
	455	/* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
c46b6562	456	regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */
f14bfe94 MA	457	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
f14bfe94 MA	458	if (rc < 0)
c46b6562 MA	459	return rc;
c46b6562 MA	460
f14bfe94 MA	461	msleep(10); /* This is dangerous as another (related) thread may start / / wait for LO to lock */
f14bfe94 MA	462
c46b6562 MA	463	regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */
c46b6562 MA	464	regs[STB6100_VCO] \|= STB6100_VCO_OCK; /* search clock off */
f14bfe94 MA	465	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
f14bfe94 MA	466	if (rc < 0)
c46b6562 MA	467	return rc;
c46b6562 MA	468
f14bfe94 MA	469	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
	470	if (rc < 0)
	471	return rc; /* Stop LPF calibration */
7e4e8c52	472
f14bfe94 MA	473	msleep(10); /* This is dangerous as another (related) thread may start */
f14bfe94 MA	474	/* wait for stabilisation, (should not be necessary) */
c46b6562 MA	475	return 0;
	476	}
	477
	478	static int stb6100_sleep(struct dvb_frontend *fe)
	479	{
	480	/* TODO: power down */
	481	return 0;
	482	}
	483
	484	static int stb6100_init(struct dvb_frontend *fe)
	485	{
	486	struct stb6100_state *state = fe->tuner_priv;
	487	struct tuner_state *status = &state->status;
	488
	489	status->tunerstep = 125000;
	490	status->ifreq = 0;
	491	status->refclock = 27000000; /* Hz */
	492	status->iqsense = 1;
	493	status->bandwidth = 36000; /* kHz */
26f26fa8	494	state->bandwidth = status->bandwidth * 1000; /* Hz */
c46b6562 MA	495	state->reference = status->refclock / 1000; /* kHz */
c46b6562 MA	496
f14bfe94 MA	497	/* Set default bandwidth. Modified, PN 13-May-10 */
f14bfe94 MA	498	return 0;
c46b6562 MA	499	}
	500
	501	static int stb6100_get_state(struct dvb_frontend *fe,
	502	enum tuner_param param,
	503	struct tuner_state *state)
	504	{
	505	switch (param) {
	506	case DVBFE_TUNER_FREQUENCY:
	507	stb6100_get_frequency(fe, &state->frequency);
	508	break;
	509	case DVBFE_TUNER_TUNERSTEP:
	510	break;
	511	case DVBFE_TUNER_IFFREQ:
	512	break;
	513	case DVBFE_TUNER_BANDWIDTH:
	514	stb6100_get_bandwidth(fe, &state->bandwidth);
	515	break;
	516	case DVBFE_TUNER_REFCLOCK:
	517	break;
	518	default:
	519	break;
	520	}
	521
	522	return 0;
	523	}
	524
	525	static int stb6100_set_state(struct dvb_frontend *fe,
	526	enum tuner_param param,
	527	struct tuner_state *state)
	528	{
	529	struct stb6100_state *tstate = fe->tuner_priv;
	530
	531	switch (param) {
	532	case DVBFE_TUNER_FREQUENCY:
	533	stb6100_set_frequency(fe, state->frequency);
7d8f1e57	534	tstate->frequency = state->frequency;
c46b6562 MA	535	break;
	536	case DVBFE_TUNER_TUNERSTEP:
	537	break;
	538	case DVBFE_TUNER_IFFREQ:
	539	break;
	540	case DVBFE_TUNER_BANDWIDTH:
	541	stb6100_set_bandwidth(fe, state->bandwidth);
7d8f1e57	542	tstate->bandwidth = state->bandwidth;
c46b6562 MA	543	break;
	544	case DVBFE_TUNER_REFCLOCK:
	545	break;
	546	default:
	547	break;
	548	}
	549
	550	return 0;
	551	}
	552
	553	static struct dvb_tuner_ops stb6100_ops = {
	554	.info = {
	555	.name = "STB6100 Silicon Tuner",
	556	.frequency_min = 950000,
	557	.frequency_max = 2150000,
	558	.frequency_step = 0,
	559	},
	560
	561	.init = stb6100_init,
	562	.sleep = stb6100_sleep,
	563	.get_status = stb6100_get_status,
	564	.get_state = stb6100_get_state,
	565	.set_state = stb6100_set_state,
c46b6562 MA	566	.release = stb6100_release
	567	};
	568
	569	struct dvb_frontend stb6100_attach(struct dvb_frontend fe,
2e4e98e7	570	const struct stb6100_config *config,
c46b6562 MA	571	struct i2c_adapter *i2c)
	572	{
	573	struct stb6100_state *state = NULL;
	574
a18d4315	575	state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
c46b6562 MA	576	if (state == NULL)
	577	goto error;
	578
	579	state->config = config;
	580	state->i2c = i2c;
	581	state->frontend = fe;
3e3263e6	582	state->reference = config->refclock / 1000; /* kHz */
c46b6562 MA	583	fe->tuner_priv = state;
	584	fe->ops.tuner_ops = stb6100_ops;
	585
3e3263e6	586	printk("%s: Attaching STB6100 \n", __func__);
c46b6562 MA	587	return fe;
	588
	589	error:
	590	kfree(state);
c46b6562 MA	591	return NULL;
	592	}
	593
	594	static int stb6100_release(struct dvb_frontend *fe)
	595	{
	596	struct stb6100_state *state = fe->tuner_priv;
	597
	598	fe->tuner_priv = NULL;
c46b6562 MA	599	kfree(state);
	600
	601	return 0;
	602	}
	603
	604	EXPORT_SYMBOL(stb6100_attach);
	605	MODULE_PARM_DESC(verbose, "Set Verbosity level");
	606
	607	MODULE_AUTHOR("Manu Abraham");
	608	MODULE_DESCRIPTION("STB6100 Silicon tuner");
	609	MODULE_LICENSE("GPL");