On 12.05.2012 11:11, Hans-Frieder Vogt wrote:
> Changes compared to version 0.5 of driver (sent 6 May):
> - Initial implementation of get_rf_strength function.
>
> Signed-off-by: Hans-Frieder Vogt <hfvogt@xxxxxxx>
>
> fc0012.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 71 insertions(+), 1 deletion(-)
>
> diff -up --new-file --recursive a/drivers/media/common/tuners/fc0012.c b/drivers/media/common/tuners/fc0012.c
> --- a/drivers/media/common/tuners/fc0012.c 2012-05-12 10:53:55.330058209 +0200
> +++ b/drivers/media/common/tuners/fc0012.c 2012-05-09 23:27:37.781193720 +0200
> @@ -343,6 +343,74 @@ static int fc0012_get_bandwidth(struct d
> return 0;
> }
>
> +#define INPUT_ADC_LEVEL -8
> +
> +static int fc0012_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
> +{
> + struct fc0012_priv *priv = fe->tuner_priv;
> + int ret;
> + unsigned char tmp;
> + int int_temp, lna_gain, int_lna, tot_agc_gain, power;
> + const int fc0012_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 = fc0012_writereg(priv, 0x12, 0x00);
> + if (ret)
> + goto err;
> +
> + ret = fc0012_readreg(priv, 0x12, &tmp);
> + if (ret)
> + goto err;
> + int_temp = tmp;
> +
> + ret = fc0012_readreg(priv, 0x13, &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(fc0012_lna_gain_table)) {
> + int_lna = fc0012_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 fc0012_tuner_ops = {
> .info = {
> @@ -363,6 +431,8 @@ static const struct dvb_tuner_ops fc0012
> .get_frequency = fc0012_get_frequency,
> .get_if_frequency = fc0012_get_if_frequency,
> .get_bandwidth = fc0012_get_bandwidth,
> +
> + .get_rf_strength = fc0012_get_rf_strength,
> };
>
> struct dvb_frontend *fc0012_attach(struct dvb_frontend *fe,
> @@ -394,4 +464,4 @@ EXPORT_SYMBOL(fc0012_attach);
> MODULE_DESCRIPTION("Fitipower FC0012 silicon tuner driver");
> MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@xxxxxxx>");
> MODULE_LICENSE("GPL");
> -MODULE_VERSION("0.5");
> +MODULE_VERSION("0.6");
>
> Hans-Frieder Vogt e-mail: hfvogt <at> gmx .dot. net
Thanks!
I was just doing the same to get it to work with the rtl2832 demod. I will
test the fc0012 driver with the rtl2832 driver today.
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