Commit 6fef4fc7 authored by Konstantin Dimitrov's avatar Konstantin Dimitrov Committed by Mauro Carvalho Chehab
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[media] ts2020: add ts2020 tuner driver 



add separate ts2020 tuner driver

Signed-off-by: default avatarKonstantin Dimitrov <kosio.dimitrov@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent c1965eae

drivers/media/dvb-frontends/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -207,6 +207,13 @@ config DVB_SI21XX 
	help

	  A DVB-S tuner module. Say Y when you want to support this frontend.



config DVB_TS2020

	tristate "Montage Tehnology TS2020 based tuners"

	depends on DVB_CORE && I2C

	default m if DVB_FE_CUSTOMISE

	help

	  A DVB-S/S2 silicon tuner. Say Y when you want to support this tuner.



config DVB_DS3000

	tristate "Montage Tehnology DS3000 based"

	depends on DVB_CORE && I2C

drivers/media/dvb-frontends/Makefile

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@@ -88,6 +88,7 @@ obj-$(CONFIG_DVB_ISL6423) += isl6423.o 
obj-$(CONFIG_DVB_EC100) += ec100.o

obj-$(CONFIG_DVB_HD29L2) += hd29l2.o

obj-$(CONFIG_DVB_DS3000) += ds3000.o

obj-$(CONFIG_DVB_TS2020) += ts2020.o

obj-$(CONFIG_DVB_MB86A16) += mb86a16.o

obj-$(CONFIG_DVB_MB86A20S) += mb86a20s.o

obj-$(CONFIG_DVB_IX2505V) += ix2505v.o

drivers/media/dvb-frontends/ts2020.c

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/*

    Montage Technology TS2020 - Silicon Tuner driver

    Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>



    Copyright (C) 2009-2012 TurboSight.com



    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 "dvb_frontend.h"

#include "ts2020.h"



#define TS2020_XTAL_FREQ   27000 /* in kHz */



struct ts2020_state {

	u8 tuner_address;

	struct i2c_adapter *i2c;

};



static int ts2020_readreg(struct dvb_frontend *fe, u8 reg)

{

	struct ts2020_state *state = fe->tuner_priv;



	int ret;

	u8 b0[] = { reg };

	u8 b1[] = { 0 };

	struct i2c_msg msg[] = {

		{

			.addr = state->tuner_address,

			.flags = 0,

			.buf = b0,

			.len = 1

		}, {

			.addr = state->tuner_address,

			.flags = I2C_M_RD,

			.buf = b1,

			.len = 1

		}

	};



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);



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



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	if (ret != 2) {

		printk(KERN_ERR "%s: reg=0x%x(error=%d)\n", __func__, reg, ret);

		return ret;

	}



	return b1[0];

}



static int ts2020_writereg(struct dvb_frontend *fe, int reg, int data)

{

	struct ts2020_state *state = fe->tuner_priv;



	u8 buf[] = { reg, data };

	struct i2c_msg msg = { .addr = state->tuner_address,

		.flags = 0, .buf = buf, .len = 2 };

	int err;





	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1);



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



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0);



	if (err != 1) {

		printk(KERN_ERR "%s: writereg error(err == %i, reg == 0x%02x,"

			 " value == 0x%02x)\n", __func__, err, reg, data);

		return -EREMOTEIO;

	}



	return 0;

}



static int ts2020_init(struct dvb_frontend *fe)

{

	ts2020_writereg(fe, 0x42, 0x73);

	ts2020_writereg(fe, 0x05, 0x01);

	ts2020_writereg(fe, 0x62, 0xf5);

	return 0;

}



static int ts2020_get_frequency(struct dvb_frontend *fe, u32 *frequency)

{

	u16 ndiv, div4;



	div4 = (ts2020_readreg(fe, 0x10) & 0x10) >> 4;



	ndiv = ts2020_readreg(fe, 0x01);

	ndiv &= 0x0f;

	ndiv <<= 8;

	ndiv |= ts2020_readreg(fe, 0x02);



	/* actual tuned frequency, i.e. including the offset */

	*frequency = (ndiv - ndiv % 2 + 1024) * TS2020_XTAL_FREQ

		/ (6 + 8) / (div4 + 1) / 2;



	return 0;

}



static int ts2020_set_params(struct dvb_frontend *fe)

{

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;



	u8 mlpf, mlpf_new, mlpf_max, mlpf_min, nlpf, div4;

	u16 value, ndiv;

	u32 srate = 0, f3db;



	ts2020_init(fe);



	/* unknown */

	ts2020_writereg(fe, 0x07, 0x02);

	ts2020_writereg(fe, 0x10, 0x00);

	ts2020_writereg(fe, 0x60, 0x79);

	ts2020_writereg(fe, 0x08, 0x01);

	ts2020_writereg(fe, 0x00, 0x01);

	div4 = 0;



	/* calculate and set freq divider */

	if (c->frequency < 1146000) {

		ts2020_writereg(fe, 0x10, 0x11);

		div4 = 1;

		ndiv = ((c->frequency * (6 + 8) * 4) +

				(TS2020_XTAL_FREQ / 2)) /

				TS2020_XTAL_FREQ - 1024;

	} else {

		ts2020_writereg(fe, 0x10, 0x01);

		ndiv = ((c->frequency * (6 + 8) * 2) +

				(TS2020_XTAL_FREQ / 2)) /

				TS2020_XTAL_FREQ - 1024;

	}



	ts2020_writereg(fe, 0x01, (ndiv & 0x0f00) >> 8);

	ts2020_writereg(fe, 0x02, ndiv & 0x00ff);



	/* set pll */

	ts2020_writereg(fe, 0x03, 0x06);

	ts2020_writereg(fe, 0x51, 0x0f);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x10);

	ts2020_writereg(fe, 0x50, 0x00);

	msleep(5);



	/* unknown */

	ts2020_writereg(fe, 0x51, 0x17);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x08);

	ts2020_writereg(fe, 0x50, 0x00);

	msleep(5);



	value = ts2020_readreg(fe, 0x3d);

	value &= 0x0f;

	if ((value > 4) && (value < 15)) {

		value -= 3;

		if (value < 4)

			value = 4;

		value = ((value << 3) | 0x01) & 0x79;

	}



	ts2020_writereg(fe, 0x60, value);

	ts2020_writereg(fe, 0x51, 0x17);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x08);

	ts2020_writereg(fe, 0x50, 0x00);



	/* set low-pass filter period */

	ts2020_writereg(fe, 0x04, 0x2e);

	ts2020_writereg(fe, 0x51, 0x1b);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x04);

	ts2020_writereg(fe, 0x50, 0x00);

	msleep(5);



	srate = c->symbol_rate / 1000;



	f3db = (srate << 2) / 5 + 2000;

	if (srate < 5000)

		f3db += 3000;

	if (f3db < 7000)

		f3db = 7000;

	if (f3db > 40000)

		f3db = 40000;



	/* set low-pass filter baseband */

	value = ts2020_readreg(fe, 0x26);

	mlpf = 0x2e * 207 / ((value << 1) + 151);

	mlpf_max = mlpf * 135 / 100;

	mlpf_min = mlpf * 78 / 100;

	if (mlpf_max > 63)

		mlpf_max = 63;



	/* rounded to the closest integer */

	nlpf = ((mlpf * f3db * 1000) + (2766 * TS2020_XTAL_FREQ / 2))

			/ (2766 * TS2020_XTAL_FREQ);

	if (nlpf > 23)

		nlpf = 23;

	if (nlpf < 1)

		nlpf = 1;



	/* rounded to the closest integer */

	mlpf_new = ((TS2020_XTAL_FREQ * nlpf * 2766) +

			(1000 * f3db / 2)) / (1000 * f3db);



	if (mlpf_new < mlpf_min) {

		nlpf++;

		mlpf_new = ((TS2020_XTAL_FREQ * nlpf * 2766) +

				(1000 * f3db / 2)) / (1000 * f3db);

	}



	if (mlpf_new > mlpf_max)

		mlpf_new = mlpf_max;



	ts2020_writereg(fe, 0x04, mlpf_new);

	ts2020_writereg(fe, 0x06, nlpf);

	ts2020_writereg(fe, 0x51, 0x1b);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x04);

	ts2020_writereg(fe, 0x50, 0x00);

	msleep(5);



	/* unknown */

	ts2020_writereg(fe, 0x51, 0x1e);

	ts2020_writereg(fe, 0x51, 0x1f);

	ts2020_writereg(fe, 0x50, 0x01);

	ts2020_writereg(fe, 0x50, 0x00);

	msleep(60);



	return 0;

}



static int ts2020_release(struct dvb_frontend *fe)

{

	struct ts2020_state *state = fe->tuner_priv;



	fe->tuner_priv = NULL;

	kfree(state);



	return 0;

}



int ts2020_get_signal_strength(struct dvb_frontend *fe,

	u16 *signal_strength)

{

	u16 sig_reading, sig_strength;

	u8 rfgain, bbgain;



	rfgain = ts2020_readreg(fe, 0x3d) & 0x1f;

	bbgain = ts2020_readreg(fe, 0x21) & 0x1f;



	if (rfgain > 15)

		rfgain = 15;

	if (bbgain > 13)

		bbgain = 13;



	sig_reading = rfgain * 2 + bbgain * 3;



	sig_strength = 40 + (64 - sig_reading) * 50 / 64 ;



	/* cook the value to be suitable for szap-s2 human readable output */

	*signal_strength = sig_strength * 1000;



	return 0;

}



static struct dvb_tuner_ops ts2020_ops = {

	.info = {

		.name = "Montage Technology TS2020 Silicon Tuner",

		.frequency_min = 950000,

		.frequency_max = 2150000,

	},



	.init = ts2020_init,

	.release = ts2020_release,

	.set_params = ts2020_set_params,

	.get_frequency = ts2020_get_frequency,

	.get_rf_strength = ts2020_get_signal_strength

};



struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,

	const struct ts2020_config *config, struct i2c_adapter *i2c)

{

	struct ts2020_state *state = NULL;



	/* allocate memory for the internal state */

	state = kzalloc(sizeof(struct ts2020_state), GFP_KERNEL);

	if (!state)

		return NULL;



	/* setup the state */

	state->tuner_address = config->tuner_address;

	state->i2c = i2c;

	fe->tuner_priv = state;

	fe->ops.tuner_ops = ts2020_ops;

	fe->ops.read_signal_strength = fe->ops.tuner_ops.get_rf_strength;



	return fe;

}

EXPORT_SYMBOL(ts2020_attach);



MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>");

MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module");

MODULE_LICENSE("GPL");

drivers/media/dvb-frontends/ts2020.h

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+49 −0
Original line number Diff line number Diff line 
/*

    Montage Technology TS2020 - Silicon Tuner driver

    Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>



    Copyright (C) 2009-2012 TurboSight.com



    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.

 */



#ifndef TS2020_H

#define TS2020_H



#include <linux/dvb/frontend.h>



struct ts2020_config {

	u8 tuner_address;

};



#if defined(CONFIG_DVB_TS2020) || \

	(defined(CONFIG_DVB_TS2020_MODULE) && defined(MODULE))



extern struct dvb_frontend *ts2020_attach(

	struct dvb_frontend *fe,

	const struct ts2020_config *config,

	struct i2c_adapter *i2c);

#else

static inline struct dvb_frontend *ts2020_attach(

	struct dvb_frontend *fe,

	const struct ts2020_config *config,

	struct i2c_adapter *i2c)

{

	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);

	return NULL;

}

#endif



#endif /* TS2020_H */