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Commit b144c98c authored by Hans-Frieder Vogt's avatar Hans-Frieder Vogt Committed by Mauro Carvalho Chehab
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[media] fc0013 ver. 0.2: introduction of get_rf_strength function 



Changes compared to version 0.1 of driver (sent 6 May):
- Initial implementation of get_rf_strength function.
- Introduction of a warning message

Signed-off-by: default avatarHans-Frieder Vogt <hfvogt@gmx.net>
Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4a14db7e

drivers/media/common/tuners/fc0013.c

+73 −1
Original line number Original line Diff line number Diff line
@@ -484,6 +484,8 @@ static int fc0013_set_params(struct dvb_frontend *fe) 
exit:

exit:

	if (fe->ops.i2c_gate_ctrl)

	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

	if (ret)

		warn("%s: failed: %d", __func__, ret);

	return ret;

	return ret;

}

}
@@ -508,6 +510,74 @@ static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) 
	return 0;

	return 0;

}

}





#define INPUT_ADC_LEVEL	-8



static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength)

{

	struct fc0013_priv *priv = fe->tuner_priv;

	int ret;

	unsigned char tmp;

	int int_temp, lna_gain, int_lna, tot_agc_gain, power;

	const int fc0013_lna_gain_table[] = {

		/* low gain */

		-63, -58, -99, -73,

		-63, -65, -54, -60,

		/* middle gain */

		 71,  70,  68,  67,

		 65,  63,  61,  58,

		/* high gain */

		197, 191, 188, 186,

		184, 182, 181, 179,

	};



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */



	ret = fc0013_writereg(priv, 0x13, 0x00);

	if (ret)

		goto err;



	ret = fc0013_readreg(priv, 0x13, &tmp);

	if (ret)

		goto err;

	int_temp = tmp;



	ret = fc0013_readreg(priv, 0x14, &tmp);

	if (ret)

		goto err;

	lna_gain = tmp & 0x1f;



	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */



	if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) {

		int_lna = fc0013_lna_gain_table[lna_gain];

		tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 +

				(int_temp & 0x1f)) * 2;

		power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10;



		if (power >= 45)

			*strength = 255;	/* 100% */

		else if (power < -95)

			*strength = 0;

		else

			*strength = (power + 95) * 255 / 140;



		*strength |= *strength << 8;

	} else {

		ret = -1;

	}



	goto exit;



err:

	if (fe->ops.i2c_gate_ctrl)

		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */

exit:

	if (ret)

		warn("%s: failed: %d", __func__, ret);

	return ret;

}





static const struct dvb_tuner_ops fc0013_tuner_ops = {

static const struct dvb_tuner_ops fc0013_tuner_ops = {

	.info = {

	.info = {
@@ -528,6 +598,8 @@ static const struct dvb_tuner_ops fc0013_tuner_ops = { 
	.get_frequency	= fc0013_get_frequency,

	.get_frequency	= fc0013_get_frequency,

	.get_if_frequency = fc0013_get_if_frequency,

	.get_if_frequency = fc0013_get_if_frequency,

	.get_bandwidth	= fc0013_get_bandwidth,

	.get_bandwidth	= fc0013_get_bandwidth,



	.get_rf_strength = fc0013_get_rf_strength,

};

};





struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,

struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,
@@ -559,4 +631,4 @@ EXPORT_SYMBOL(fc0013_attach); 
MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");

MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");

MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");

MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");

MODULE_LICENSE("GPL");

MODULE_LICENSE("GPL");

MODULE_VERSION("0.1");
 
MODULE_VERSION("0.2");