drivers/media/dvb-frontends/stv0288.c - linux/kernel/git/tj/cgroup - Git at Google

 /*
 	Driver for ST STV0288 demodulator
 	Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
 		for Reel Multimedia
 	Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
 	Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
 		Removed stb6000 specific tuner code and revised some
 		procedures.
 	2010-09-01 Josef Pavlik <josef@pavlik.it>
 		Fixed diseqc_msg, diseqc_burst and set_tone problems

 	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/string.h>
 #include <linux/slab.h>
 #include <linux/jiffies.h>
 #include <asm/div64.h>

 #include "dvb_frontend.h"
 #include "stv0288.h"

 struct stv0288_state {
 	struct i2c_adapter *i2c;
 	const struct stv0288_config *config;
 	struct dvb_frontend frontend;

 	u8 initialised:1;
 	u32 tuner_frequency;
 	u32 symbol_rate;
 	fe_code_rate_t fec_inner;
 	int errmode;
 };

 #define STATUS_BER 0
 #define STATUS_UCBLOCKS 1

 static int debug;
 static int debug_legacy_dish_switch;
 #define dprintk(args...) \
 	do { \
 		if (debug) \
 			printk(KERN_DEBUG "stv0288: " args); \
 	} while (0)


 static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
 {
 	int ret;
 	u8 buf[] = { reg, data };
 	struct i2c_msg msg = {
 		.addr = state->config->demod_address,
 		.flags = 0,
 		.buf = buf,
 		.len = 2
 	};

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

 	if (ret != 1)
 		dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
 			"ret == %i)\n", __func__, reg, data, ret);

 	return (ret != 1) ? -EREMOTEIO : 0;
 }

 static int stv0288_write(struct dvb_frontend *fe, const u8 buf[], int len)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	if (len != 2)
 		return -EINVAL;

 	return stv0288_writeregI(state, buf[0], buf[1]);
 }

 static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
 {
 	int ret;
 	u8 b0[] = { reg };
 	u8 b1[] = { 0 };
 	struct i2c_msg msg[] = {
 		{
 			.addr = state->config->demod_address,
 			.flags = 0,
 			.buf = b0,
 			.len = 1
 		}, {
 			.addr = state->config->demod_address,
 			.flags = I2C_M_RD,
 			.buf = b1,
 			.len = 1
 		}
 	};

 	ret = i2c_transfer(state->i2c, msg, 2);

 	if (ret != 2)
 		dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
 				__func__, reg, ret);

 	return b1[0];
 }

 static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
 {
 	struct stv0288_state *state = fe->demodulator_priv;
 	unsigned int temp;
 	unsigned char b[3];

 	if ((srate < 1000000) || (srate > 45000000))
 		return -EINVAL;

 	stv0288_writeregI(state, 0x22, 0);
 	stv0288_writeregI(state, 0x23, 0);
 	stv0288_writeregI(state, 0x2b, 0xff);
 	stv0288_writeregI(state, 0x2c, 0xf7);

 	temp = (unsigned int)srate / 1000;

 		temp = temp * 32768;
 		temp = temp / 25;
 		temp = temp / 125;
 		b[0] = (unsigned char)((temp >> 12) & 0xff);
 		b[1] = (unsigned char)((temp >> 4) & 0xff);
 		b[2] = (unsigned char)((temp << 4) & 0xf0);
 		stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
 		stv0288_writeregI(state, 0x29, 0); /* SFRM */
 		stv0288_writeregI(state, 0x2a, 0); /* SFRL */

 		stv0288_writeregI(state, 0x28, b[0]);
 		stv0288_writeregI(state, 0x29, b[1]);
 		stv0288_writeregI(state, 0x2a, b[2]);
 		dprintk("stv0288: stv0288_set_symbolrate\n");

 	return 0;
 }

 static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
 				    struct dvb_diseqc_master_cmd *m)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	int i;

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

 	stv0288_writeregI(state, 0x09, 0);
 	msleep(30);
 	stv0288_writeregI(state, 0x05, 0x12);/* modulated mode, single shot */

 	for (i = 0; i < m->msg_len; i++) {
 		if (stv0288_writeregI(state, 0x06, m->msg[i]))
 			return -EREMOTEIO;
 	}
 	msleep(m->msg_len*12);
 	return 0;
 }

 static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
 						fe_sec_mini_cmd_t burst)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

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

 	if (stv0288_writeregI(state, 0x05, 0x03))/* burst mode, single shot */
 		return -EREMOTEIO;

 	if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
 		return -EREMOTEIO;

 	msleep(15);
 	if (stv0288_writeregI(state, 0x05, 0x12))
 		return -EREMOTEIO;

 	return 0;
 }

 static int stv0288_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	switch (tone) {
 	case SEC_TONE_ON:
 		if (stv0288_writeregI(state, 0x05, 0x10))/* cont carrier */
 			return -EREMOTEIO;
 	break;

 	case SEC_TONE_OFF:
 		if (stv0288_writeregI(state, 0x05, 0x12))/* burst mode off*/
 			return -EREMOTEIO;
 	break;

 	default:
 		return -EINVAL;
 	}
 	return 0;
 }

 static u8 stv0288_inittab[] = {
 	0x01, 0x15,
 	0x02, 0x20,
 	0x09, 0x0,
 	0x0a, 0x4,
 	0x0b, 0x0,
 	0x0c, 0x0,
 	0x0d, 0x0,
 	0x0e, 0xd4,
 	0x0f, 0x30,
 	0x11, 0x80,
 	0x12, 0x03,
 	0x13, 0x48,
 	0x14, 0x84,
 	0x15, 0x45,
 	0x16, 0xb7,
 	0x17, 0x9c,
 	0x18, 0x0,
 	0x19, 0xa6,
 	0x1a, 0x88,
 	0x1b, 0x8f,
 	0x1c, 0xf0,
 	0x20, 0x0b,
 	0x21, 0x54,
 	0x22, 0x0,
 	0x23, 0x0,
 	0x2b, 0xff,
 	0x2c, 0xf7,
 	0x30, 0x0,
 	0x31, 0x1e,
 	0x32, 0x14,
 	0x33, 0x0f,
 	0x34, 0x09,
 	0x35, 0x0c,
 	0x36, 0x05,
 	0x37, 0x2f,
 	0x38, 0x16,
 	0x39, 0xbe,
 	0x3a, 0x0,
 	0x3b, 0x13,
 	0x3c, 0x11,
 	0x3d, 0x30,
 	0x40, 0x63,
 	0x41, 0x04,
 	0x42, 0x20,
 	0x43, 0x00,
 	0x44, 0x00,
 	0x45, 0x00,
 	0x46, 0x00,
 	0x47, 0x00,
 	0x4a, 0x00,
 	0x50, 0x10,
 	0x51, 0x38,
 	0x52, 0x21,
 	0x58, 0x54,
 	0x59, 0x86,
 	0x5a, 0x0,
 	0x5b, 0x9b,
 	0x5c, 0x08,
 	0x5d, 0x7f,
 	0x5e, 0x0,
 	0x5f, 0xff,
 	0x70, 0x0,
 	0x71, 0x0,
 	0x72, 0x0,
 	0x74, 0x0,
 	0x75, 0x0,
 	0x76, 0x0,
 	0x81, 0x0,
 	0x82, 0x3f,
 	0x83, 0x3f,
 	0x84, 0x0,
 	0x85, 0x0,
 	0x88, 0x0,
 	0x89, 0x0,
 	0x8a, 0x0,
 	0x8b, 0x0,
 	0x8c, 0x0,
 	0x90, 0x0,
 	0x91, 0x0,
 	0x92, 0x0,
 	0x93, 0x0,
 	0x94, 0x1c,
 	0x97, 0x0,
 	0xa0, 0x48,
 	0xa1, 0x0,
 	0xb0, 0xb8,
 	0xb1, 0x3a,
 	0xb2, 0x10,
 	0xb3, 0x82,
 	0xb4, 0x80,
 	0xb5, 0x82,
 	0xb6, 0x82,
 	0xb7, 0x82,
 	0xb8, 0x20,
 	0xb9, 0x0,
 	0xf0, 0x0,
 	0xf1, 0x0,
 	0xf2, 0xc0,
 	0x51, 0x36,
 	0x52, 0x09,
 	0x53, 0x94,
 	0x54, 0x62,
 	0x55, 0x29,
 	0x56, 0x64,
 	0x57, 0x2b,
 	0xff, 0xff,
 };

 static int stv0288_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt)
 {
 	dprintk("%s: %s\n", __func__,
 		volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
 		volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");

 	return 0;
 }

 static int stv0288_init(struct dvb_frontend *fe)
 {
 	struct stv0288_state *state = fe->demodulator_priv;
 	int i;
 	u8 reg;
 	u8 val;

 	dprintk("stv0288: init chip\n");
 	stv0288_writeregI(state, 0x41, 0x04);
 	msleep(50);

 	/* we have default inittab */
 	if (state->config->inittab == NULL) {
 		for (i = 0; !(stv0288_inittab[i] == 0xff &&
 				stv0288_inittab[i + 1] == 0xff); i += 2)
 			stv0288_writeregI(state, stv0288_inittab[i],
 					stv0288_inittab[i + 1]);
 	} else {
 		for (i = 0; ; i += 2)  {
 			reg = state->config->inittab[i];
 			val = state->config->inittab[i+1];
 			if (reg == 0xff && val == 0xff)
 				break;
 			stv0288_writeregI(state, reg, val);
 		}
 	}
 	return 0;
 }

 static int stv0288_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	u8 sync = stv0288_readreg(state, 0x24);
 	if (sync == 255)
 		sync = 0;

 	dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);

 	*status = 0;
 	if (sync & 0x80)
 		*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
 	if (sync & 0x10)
 		*status |= FE_HAS_VITERBI;
 	if (sync & 0x08) {
 		*status |= FE_HAS_LOCK;
 		dprintk("stv0288 has locked\n");
 	}

 	return 0;
 }

 static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	if (state->errmode != STATUS_BER)
 		return 0;
 	*ber = (stv0288_readreg(state, 0x26) << 8) |
 					stv0288_readreg(state, 0x27);
 	dprintk("stv0288_read_ber %d\n", *ber);

 	return 0;
 }


 static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	s32 signal =  0xffff - ((stv0288_readreg(state, 0x10) << 8));


 	signal = signal * 5 / 4;
 	*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
 	dprintk("stv0288_read_signal_strength %d\n", *strength);

 	return 0;
 }
 static int stv0288_sleep(struct dvb_frontend *fe)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	stv0288_writeregI(state, 0x41, 0x84);
 	state->initialised = 0;

 	return 0;
 }
 static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
 			   | stv0288_readreg(state, 0x2e));
 	xsnr = 3 * (xsnr - 0xa100);
 	*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
 	dprintk("stv0288_read_snr %d\n", *snr);

 	return 0;
 }

 static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	if (state->errmode != STATUS_BER)
 		return 0;
 	*ucblocks = (stv0288_readreg(state, 0x26) << 8) |
 					stv0288_readreg(state, 0x27);
 	dprintk("stv0288_read_ber %d\n", *ucblocks);

 	return 0;
 }

 static int stv0288_set_property(struct dvb_frontend *fe, struct dtv_property *p)
 {
 	dprintk("%s(..)\n", __func__);
 	return 0;
 }

 static int stv0288_set_frontend(struct dvb_frontend *fe)
 {
 	struct stv0288_state *state = fe->demodulator_priv;
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

 	char tm;
 	unsigned char tda[3];
 	u8 reg, time_out = 0;

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

 	if (c->delivery_system != SYS_DVBS) {
 			dprintk("%s: unsupported delivery "
 				"system selected (%d)\n",
 				__func__, c->delivery_system);
 			return -EOPNOTSUPP;
 	}

 	if (state->config->set_ts_params)
 		state->config->set_ts_params(fe, 0);

 	/* only frequency & symbol_rate are used for tuner*/
 	if (fe->ops.tuner_ops.set_params) {
 		fe->ops.tuner_ops.set_params(fe);
 		if (fe->ops.i2c_gate_ctrl)
 			fe->ops.i2c_gate_ctrl(fe, 0);
 	}

 	udelay(10);
 	stv0288_set_symbolrate(fe, c->symbol_rate);
 	/* Carrier lock control register */
 	stv0288_writeregI(state, 0x15, 0xc5);

 	tda[2] = 0x0; /* CFRL */
 	for (tm = -9; tm < 7;) {
 		/* Viterbi status */
 		reg = stv0288_readreg(state, 0x24);
 		if (reg & 0x8)
 				break;
 		if (reg & 0x80) {
 			time_out++;
 			if (time_out > 10)
 				break;
 			tda[2] += 40;
 			if (tda[2] < 40)
 				tm++;
 		} else {
 			tm++;
 			tda[2] = 0;
 			time_out = 0;
 		}
 		tda[1] = (unsigned char)tm;
 		stv0288_writeregI(state, 0x2b, tda[1]);
 		stv0288_writeregI(state, 0x2c, tda[2]);
 		msleep(30);
 	}
 	state->tuner_frequency = c->frequency;
 	state->fec_inner = FEC_AUTO;
 	state->symbol_rate = c->symbol_rate;

 	return 0;
 }

 static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 {
 	struct stv0288_state *state = fe->demodulator_priv;

 	if (enable)
 		stv0288_writeregI(state, 0x01, 0xb5);
 	else
 		stv0288_writeregI(state, 0x01, 0x35);

 	udelay(1);

 	return 0;
 }

 static void stv0288_release(struct dvb_frontend *fe)
 {
 	struct stv0288_state *state = fe->demodulator_priv;
 	kfree(state);
 }

 static struct dvb_frontend_ops stv0288_ops = {
 	.delsys = { SYS_DVBS },
 	.info = {
 		.name			= "ST STV0288 DVB-S",
 		.frequency_min		= 950000,
 		.frequency_max		= 2150000,
 		.frequency_stepsize	= 1000,	 /* kHz for QPSK frontends */
 		.frequency_tolerance	= 0,
 		.symbol_rate_min	= 1000000,
 		.symbol_rate_max	= 45000000,
 		.symbol_rate_tolerance	= 500,	/* ppm */
 		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 		      FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 		      FE_CAN_QPSK |
 		      FE_CAN_FEC_AUTO
 	},

 	.release = stv0288_release,
 	.init = stv0288_init,
 	.sleep = stv0288_sleep,
 	.write = stv0288_write,
 	.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
 	.read_status = stv0288_read_status,
 	.read_ber = stv0288_read_ber,
 	.read_signal_strength = stv0288_read_signal_strength,
 	.read_snr = stv0288_read_snr,
 	.read_ucblocks = stv0288_read_ucblocks,
 	.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
 	.diseqc_send_burst = stv0288_send_diseqc_burst,
 	.set_tone = stv0288_set_tone,
 	.set_voltage = stv0288_set_voltage,

 	.set_property = stv0288_set_property,
 	.set_frontend = stv0288_set_frontend,
 };

 struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
 				    struct i2c_adapter *i2c)
 {
 	struct stv0288_state *state = NULL;
 	int id;

 	/* allocate memory for the internal state */
 	state = kzalloc(sizeof(struct stv0288_state), GFP_KERNEL);
 	if (state == NULL)
 		goto error;

 	/* setup the state */
 	state->config = config;
 	state->i2c = i2c;
 	state->initialised = 0;
 	state->tuner_frequency = 0;
 	state->symbol_rate = 0;
 	state->fec_inner = 0;
 	state->errmode = STATUS_BER;

 	stv0288_writeregI(state, 0x41, 0x04);
 	msleep(200);
 	id = stv0288_readreg(state, 0x00);
 	dprintk("stv0288 id %x\n", id);

 	/* register 0x00 contains 0x11 for STV0288  */
 	if (id != 0x11)
 		goto error;

 	/* create dvb_frontend */
 	memcpy(&state->frontend.ops, &stv0288_ops,
 			sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;

 error:
 	kfree(state);

 	return NULL;
 }
 EXPORT_SYMBOL(stv0288_attach);

 module_param(debug_legacy_dish_switch, int, 0444);
 MODULE_PARM_DESC(debug_legacy_dish_switch,
 		"Enable timing analysis for Dish Network legacy switches");

 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

 MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
 MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
 MODULE_LICENSE("GPL");
	/*
	Driver for ST STV0288 demodulator
	Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
	for Reel Multimedia
	Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
	Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
	Removed stb6000 specific tuner code and revised some
	procedures.
	2010-09-01 Josef Pavlik <josef@pavlik.it>
	Fixed diseqc_msg, diseqc_burst and set_tone problems

	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/string.h>
	#include <linux/slab.h>
	#include <linux/jiffies.h>
	#include <asm/div64.h>

	#include "dvb_frontend.h"
	#include "stv0288.h"

	struct stv0288_state {
	struct i2c_adapter *i2c;
	const struct stv0288_config *config;
	struct dvb_frontend frontend;

	u8 initialised:1;
	u32 tuner_frequency;
	u32 symbol_rate;
	fe_code_rate_t fec_inner;
	int errmode;
	};

	#define STATUS_BER 0
	#define STATUS_UCBLOCKS 1

	static int debug;
	static int debug_legacy_dish_switch;
	#define dprintk(args...) \
	do { \
	if (debug) \
	printk(KERN_DEBUG "stv0288: " args); \
	} while (0)


	static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
	{
	int ret;
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {
	.addr = state->config->demod_address,
	.flags = 0,
	.buf = buf,
	.len = 2
	};

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

	if (ret != 1)
	dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
	"ret == %i)\n", __func__, reg, data, ret);

	return (ret != 1) ? -EREMOTEIO : 0;
	}

	static int stv0288_write(struct dvb_frontend *fe, const u8 buf[], int len)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	if (len != 2)
	return -EINVAL;

	return stv0288_writeregI(state, buf[0], buf[1]);
	}

	static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
	{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = {
	{
	.addr = state->config->demod_address,
	.flags = 0,
	.buf = b0,
	.len = 1
	}, {
	.addr = state->config->demod_address,
	.flags = I2C_M_RD,
	.buf = b1,
	.len = 1
	}
	};

	ret = i2c_transfer(state->i2c, msg, 2);

	if (ret != 2)
	dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
	__func__, reg, ret);

	return b1[0];
	}

	static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
	{
	struct stv0288_state *state = fe->demodulator_priv;
	unsigned int temp;
	unsigned char b[3];

	if ((srate < 1000000) \|\| (srate > 45000000))
	return -EINVAL;

	stv0288_writeregI(state, 0x22, 0);
	stv0288_writeregI(state, 0x23, 0);
	stv0288_writeregI(state, 0x2b, 0xff);
	stv0288_writeregI(state, 0x2c, 0xf7);

	temp = (unsigned int)srate / 1000;

	temp = temp * 32768;
	temp = temp / 25;
	temp = temp / 125;
	b[0] = (unsigned char)((temp >> 12) & 0xff);
	b[1] = (unsigned char)((temp >> 4) & 0xff);
	b[2] = (unsigned char)((temp << 4) & 0xf0);
	stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
	stv0288_writeregI(state, 0x29, 0); /* SFRM */
	stv0288_writeregI(state, 0x2a, 0); /* SFRL */

	stv0288_writeregI(state, 0x28, b[0]);
	stv0288_writeregI(state, 0x29, b[1]);
	stv0288_writeregI(state, 0x2a, b[2]);
	dprintk("stv0288: stv0288_set_symbolrate\n");

	return 0;
	}

	static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
	struct dvb_diseqc_master_cmd *m)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	int i;

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

	stv0288_writeregI(state, 0x09, 0);
	msleep(30);
	stv0288_writeregI(state, 0x05, 0x12);/* modulated mode, single shot */

	for (i = 0; i < m->msg_len; i++) {
	if (stv0288_writeregI(state, 0x06, m->msg[i]))
	return -EREMOTEIO;
	}
	msleep(m->msg_len*12);
	return 0;
	}

	static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
	fe_sec_mini_cmd_t burst)
	{
	struct stv0288_state *state = fe->demodulator_priv;

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

	if (stv0288_writeregI(state, 0x05, 0x03))/* burst mode, single shot */
	return -EREMOTEIO;

	if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
	return -EREMOTEIO;

	msleep(15);
	if (stv0288_writeregI(state, 0x05, 0x12))
	return -EREMOTEIO;

	return 0;
	}

	static int stv0288_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	switch (tone) {
	case SEC_TONE_ON:
	if (stv0288_writeregI(state, 0x05, 0x10))/* cont carrier */
	return -EREMOTEIO;
	break;

	case SEC_TONE_OFF:
	if (stv0288_writeregI(state, 0x05, 0x12))/* burst mode off*/
	return -EREMOTEIO;
	break;

	default:
	return -EINVAL;
	}
	return 0;
	}

	static u8 stv0288_inittab[] = {
	0x01, 0x15,
	0x02, 0x20,
	0x09, 0x0,
	0x0a, 0x4,
	0x0b, 0x0,
	0x0c, 0x0,
	0x0d, 0x0,
	0x0e, 0xd4,
	0x0f, 0x30,
	0x11, 0x80,
	0x12, 0x03,
	0x13, 0x48,
	0x14, 0x84,
	0x15, 0x45,
	0x16, 0xb7,
	0x17, 0x9c,
	0x18, 0x0,
	0x19, 0xa6,
	0x1a, 0x88,
	0x1b, 0x8f,
	0x1c, 0xf0,
	0x20, 0x0b,
	0x21, 0x54,
	0x22, 0x0,
	0x23, 0x0,
	0x2b, 0xff,
	0x2c, 0xf7,
	0x30, 0x0,
	0x31, 0x1e,
	0x32, 0x14,
	0x33, 0x0f,
	0x34, 0x09,
	0x35, 0x0c,
	0x36, 0x05,
	0x37, 0x2f,
	0x38, 0x16,
	0x39, 0xbe,
	0x3a, 0x0,
	0x3b, 0x13,
	0x3c, 0x11,
	0x3d, 0x30,
	0x40, 0x63,
	0x41, 0x04,
	0x42, 0x20,
	0x43, 0x00,
	0x44, 0x00,
	0x45, 0x00,
	0x46, 0x00,
	0x47, 0x00,
	0x4a, 0x00,
	0x50, 0x10,
	0x51, 0x38,
	0x52, 0x21,
	0x58, 0x54,
	0x59, 0x86,
	0x5a, 0x0,
	0x5b, 0x9b,
	0x5c, 0x08,
	0x5d, 0x7f,
	0x5e, 0x0,
	0x5f, 0xff,
	0x70, 0x0,
	0x71, 0x0,
	0x72, 0x0,
	0x74, 0x0,
	0x75, 0x0,
	0x76, 0x0,
	0x81, 0x0,
	0x82, 0x3f,
	0x83, 0x3f,
	0x84, 0x0,
	0x85, 0x0,
	0x88, 0x0,
	0x89, 0x0,
	0x8a, 0x0,
	0x8b, 0x0,
	0x8c, 0x0,
	0x90, 0x0,
	0x91, 0x0,
	0x92, 0x0,
	0x93, 0x0,
	0x94, 0x1c,
	0x97, 0x0,
	0xa0, 0x48,
	0xa1, 0x0,
	0xb0, 0xb8,
	0xb1, 0x3a,
	0xb2, 0x10,
	0xb3, 0x82,
	0xb4, 0x80,
	0xb5, 0x82,
	0xb6, 0x82,
	0xb7, 0x82,
	0xb8, 0x20,
	0xb9, 0x0,
	0xf0, 0x0,
	0xf1, 0x0,
	0xf2, 0xc0,
	0x51, 0x36,
	0x52, 0x09,
	0x53, 0x94,
	0x54, 0x62,
	0x55, 0x29,
	0x56, 0x64,
	0x57, 0x2b,
	0xff, 0xff,
	};

	static int stv0288_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt)
	{
	dprintk("%s: %s\n", __func__,
	volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
	volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");

	return 0;
	}

	static int stv0288_init(struct dvb_frontend *fe)
	{
	struct stv0288_state *state = fe->demodulator_priv;
	int i;
	u8 reg;
	u8 val;

	dprintk("stv0288: init chip\n");
	stv0288_writeregI(state, 0x41, 0x04);
	msleep(50);

	/* we have default inittab */
	if (state->config->inittab == NULL) {
	for (i = 0; !(stv0288_inittab[i] == 0xff &&
	stv0288_inittab[i + 1] == 0xff); i += 2)
	stv0288_writeregI(state, stv0288_inittab[i],
	stv0288_inittab[i + 1]);
	} else {
	for (i = 0; ; i += 2) {
	reg = state->config->inittab[i];
	val = state->config->inittab[i+1];
	if (reg == 0xff && val == 0xff)
	break;
	stv0288_writeregI(state, reg, val);
	}
	}
	return 0;
	}

	static int stv0288_read_status(struct dvb_frontend fe, fe_status_t status)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	u8 sync = stv0288_readreg(state, 0x24);
	if (sync == 255)
	sync = 0;

	dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);

	*status = 0;
	if (sync & 0x80)
	*status \|= FE_HAS_CARRIER \| FE_HAS_SIGNAL;
	if (sync & 0x10)
	*status \|= FE_HAS_VITERBI;
	if (sync & 0x08) {
	*status \|= FE_HAS_LOCK;
	dprintk("stv0288 has locked\n");
	}

	return 0;
	}

	static int stv0288_read_ber(struct dvb_frontend fe, u32 ber)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	if (state->errmode != STATUS_BER)
	return 0;
	*ber = (stv0288_readreg(state, 0x26) << 8) \|
	stv0288_readreg(state, 0x27);
	dprintk("stv0288_read_ber %d\n", *ber);

	return 0;
	}


	static int stv0288_read_signal_strength(struct dvb_frontend fe, u16 strength)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	s32 signal = 0xffff - ((stv0288_readreg(state, 0x10) << 8));


	signal = signal * 5 / 4;
	*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
	dprintk("stv0288_read_signal_strength %d\n", *strength);

	return 0;
	}
	static int stv0288_sleep(struct dvb_frontend *fe)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	stv0288_writeregI(state, 0x41, 0x84);
	state->initialised = 0;

	return 0;
	}
	static int stv0288_read_snr(struct dvb_frontend fe, u16 snr)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
	\| stv0288_readreg(state, 0x2e));
	xsnr = 3 * (xsnr - 0xa100);
	*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
	dprintk("stv0288_read_snr %d\n", *snr);

	return 0;
	}

	static int stv0288_read_ucblocks(struct dvb_frontend fe, u32 ucblocks)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	if (state->errmode != STATUS_BER)
	return 0;
	*ucblocks = (stv0288_readreg(state, 0x26) << 8) \|
	stv0288_readreg(state, 0x27);
	dprintk("stv0288_read_ber %d\n", *ucblocks);

	return 0;
	}

	static int stv0288_set_property(struct dvb_frontend fe, struct dtv_property p)
	{
	dprintk("%s(..)\n", __func__);
	return 0;
	}

	static int stv0288_set_frontend(struct dvb_frontend *fe)
	{
	struct stv0288_state *state = fe->demodulator_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	char tm;
	unsigned char tda[3];
	u8 reg, time_out = 0;

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

	if (c->delivery_system != SYS_DVBS) {
	dprintk("%s: unsupported delivery "
	"system selected (%d)\n",
	__func__, c->delivery_system);
	return -EOPNOTSUPP;
	}

	if (state->config->set_ts_params)
	state->config->set_ts_params(fe, 0);

	/* only frequency & symbol_rate are used for tuner*/
	if (fe->ops.tuner_ops.set_params) {
	fe->ops.tuner_ops.set_params(fe);
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);
	}

	udelay(10);
	stv0288_set_symbolrate(fe, c->symbol_rate);
	/* Carrier lock control register */
	stv0288_writeregI(state, 0x15, 0xc5);

	tda[2] = 0x0; /* CFRL */
	for (tm = -9; tm < 7;) {
	/* Viterbi status */
	reg = stv0288_readreg(state, 0x24);
	if (reg & 0x8)
	break;
	if (reg & 0x80) {
	time_out++;
	if (time_out > 10)
	break;
	tda[2] += 40;
	if (tda[2] < 40)
	tm++;
	} else {
	tm++;
	tda[2] = 0;
	time_out = 0;
	}
	tda[1] = (unsigned char)tm;
	stv0288_writeregI(state, 0x2b, tda[1]);
	stv0288_writeregI(state, 0x2c, tda[2]);
	msleep(30);
	}
	state->tuner_frequency = c->frequency;
	state->fec_inner = FEC_AUTO;
	state->symbol_rate = c->symbol_rate;

	return 0;
	}

	static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
	{
	struct stv0288_state *state = fe->demodulator_priv;

	if (enable)
	stv0288_writeregI(state, 0x01, 0xb5);
	else
	stv0288_writeregI(state, 0x01, 0x35);

	udelay(1);

	return 0;
	}

	static void stv0288_release(struct dvb_frontend *fe)
	{
	struct stv0288_state *state = fe->demodulator_priv;
	kfree(state);
	}

	static struct dvb_frontend_ops stv0288_ops = {
	.delsys = { SYS_DVBS },
	.info = {
	.name = "ST STV0288 DVB-S",
	.frequency_min = 950000,
	.frequency_max = 2150000,
	.frequency_stepsize = 1000, /* kHz for QPSK frontends */
	.frequency_tolerance = 0,
	.symbol_rate_min = 1000000,
	.symbol_rate_max = 45000000,
	.symbol_rate_tolerance = 500, /* ppm */
	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \|
	FE_CAN_QPSK \|
	FE_CAN_FEC_AUTO
	},

	.release = stv0288_release,
	.init = stv0288_init,
	.sleep = stv0288_sleep,
	.write = stv0288_write,
	.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
	.read_status = stv0288_read_status,
	.read_ber = stv0288_read_ber,
	.read_signal_strength = stv0288_read_signal_strength,
	.read_snr = stv0288_read_snr,
	.read_ucblocks = stv0288_read_ucblocks,
	.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
	.diseqc_send_burst = stv0288_send_diseqc_burst,
	.set_tone = stv0288_set_tone,
	.set_voltage = stv0288_set_voltage,

	.set_property = stv0288_set_property,
	.set_frontend = stv0288_set_frontend,
	};

	struct dvb_frontend stv0288_attach(const struct stv0288_config config,
	struct i2c_adapter *i2c)
	{
	struct stv0288_state *state = NULL;
	int id;

	/* allocate memory for the internal state */
	state = kzalloc(sizeof(struct stv0288_state), GFP_KERNEL);
	if (state == NULL)
	goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	state->initialised = 0;
	state->tuner_frequency = 0;
	state->symbol_rate = 0;
	state->fec_inner = 0;
	state->errmode = STATUS_BER;

	stv0288_writeregI(state, 0x41, 0x04);
	msleep(200);
	id = stv0288_readreg(state, 0x00);
	dprintk("stv0288 id %x\n", id);

	/* register 0x00 contains 0x11 for STV0288 */
	if (id != 0x11)
	goto error;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &stv0288_ops,
	sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;

	error:
	kfree(state);

	return NULL;
	}
	EXPORT_SYMBOL(stv0288_attach);

	module_param(debug_legacy_dish_switch, int, 0444);
	MODULE_PARM_DESC(debug_legacy_dish_switch,
	"Enable timing analysis for Dish Network legacy switches");

	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

	MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
	MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
	MODULE_LICENSE("GPL");