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: Hans-Frieder Vogt <hfvogt@xxxxxxx>
fc0013.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 73 insertions(+), 1 deletion(-)
diff -up --new-file --recursive a/drivers/media/common/tuners/fc0013.c b/drivers/media/common/tuners/fc0013.c
--- a/drivers/media/common/tuners/fc0013.c 2012-05-12 10:54:01.093352494 +0200
+++ b/drivers/media/common/tuners/fc0013.c 2012-05-12 11:00:29.940455095 +0200
@@ -484,6 +484,8 @@ static int fc0013_set_params(struct dvb_
exit:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+ if (ret)
+ warn("%s: failed: %d", __func__, ret);
return ret;
}
@@ -508,6 +510,74 @@ static int fc0013_get_bandwidth(struct d
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 = {
.info = {
@@ -528,6 +598,8 @@ static const struct dvb_tuner_ops fc0013
.get_frequency = fc0013_get_frequency,
.get_if_frequency = fc0013_get_if_frequency,
.get_bandwidth = fc0013_get_bandwidth,
+
+ .get_rf_strength = fc0013_get_rf_strength,
};
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_AUTHOR("Hans-Frieder Vogt <hfvogt@xxxxxxx>");
MODULE_LICENSE("GPL");
-MODULE_VERSION("0.1");
+MODULE_VERSION("0.2");
Hans-Frieder Vogt e-mail: hfvogt <at> gmx .dot. net
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