Add gain control for LNA, Mixer and IF. Expose controls via DVB
frontend .set_config callback.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/tuners/e4000.c | 68 +++++++++++++++++++++++++++++++++++++++
drivers/media/tuners/e4000.h | 6 ++++
drivers/media/tuners/e4000_priv.h | 63 ++++++++++++++++++++++++++++++++++++
3 files changed, 137 insertions(+)
diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
index 0153169..651de11 100644
--- a/drivers/media/tuners/e4000.c
+++ b/drivers/media/tuners/e4000.c
@@ -385,6 +385,73 @@ static int e4000_get_if_frequency(struct dvb_frontend *fe,
u32 *frequency)
return 0;
}
+static int e4000_set_config(struct dvb_frontend *fe, void *priv_cfg)
+{
+ struct e4000_priv *priv = fe->tuner_priv;
+ struct e4000_ctrl *ctrl = priv_cfg;
+ int ret;
+ u8 buf[2];
+ u8 u8tmp;
+ dev_dbg(&priv->client->dev, "%s: lna=%d mixer=%d if=%d\n", __func__,
+ ctrl->lna_gain, ctrl->mixer_gain, ctrl->if_gain);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ if (ctrl->lna_gain == INT_MIN && ctrl->if_gain == INT_MIN)
+ u8tmp = 0x17;
+ else if (ctrl->lna_gain == INT_MIN)
+ u8tmp = 0x19;
+ else if (ctrl->if_gain == INT_MIN)
+ u8tmp = 0x16;
+ else
+ u8tmp = 0x10;
+
+ ret = e4000_wr_reg(priv, 0x1a, u8tmp);
+ if (ret)
+ goto err;
+
+ if (ctrl->mixer_gain == INT_MIN)
+ u8tmp = 0x15;
+ else
+ u8tmp = 0x14;
+
+ ret = e4000_wr_reg(priv, 0x20, u8tmp);
+ if (ret)
+ goto err;
+
+ if (ctrl->lna_gain != INT_MIN) {
+ ret = e4000_wr_reg(priv, 0x14, ctrl->lna_gain);
+ if (ret)
+ goto err;
+ }
+
+ if (ctrl->mixer_gain != INT_MIN) {
+ ret = e4000_wr_reg(priv, 0x15, ctrl->mixer_gain);
+ if (ret)
+ goto err;
+ }
+
+ if (ctrl->if_gain != INT_MIN) {
+ buf[0] = e4000_if_gain_lut[ctrl->if_gain].reg16_val;
+ buf[1] = e4000_if_gain_lut[ctrl->if_gain].reg17_val;
+ ret = e4000_wr_regs(priv, 0x16, buf, 2);
+ if (ret)
+ goto err;
+ }
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ return 0;
+err:
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
+ return ret;
+}
+
static const struct dvb_tuner_ops e4000_tuner_ops = {
.info = {
.name = "Elonics E4000",
@@ -395,6 +462,7 @@ static const struct dvb_tuner_ops e4000_tuner_ops = {
.init = e4000_init,
.sleep = e4000_sleep,
.set_params = e4000_set_params,
+ .set_config = e4000_set_config,
.get_if_frequency = e4000_get_if_frequency,
};
diff --git a/drivers/media/tuners/e4000.h b/drivers/media/tuners/e4000.h
index e74b8b2..d95c472 100644
--- a/drivers/media/tuners/e4000.h
+++ b/drivers/media/tuners/e4000.h
@@ -40,4 +40,10 @@ struct e4000_config {
u32 clock;
};
+struct e4000_ctrl {
+ int lna_gain;
+ int mixer_gain;
+ int if_gain;
+};
+
#endif
diff --git a/drivers/media/tuners/e4000_priv.h
b/drivers/media/tuners/e4000_priv.h
index 8f45a30..a75a383 100644
--- a/drivers/media/tuners/e4000_priv.h
+++ b/drivers/media/tuners/e4000_priv.h
@@ -145,4 +145,67 @@ static const struct e4000_if_filter e4000_if_filter_lut[]
= {
{ 0xffffffff, 0x00, 0x20 },
};
+struct e4000_if_gain {
+ u8 reg16_val;
+ u8 reg17_val;
+};
+
+static const struct e4000_if_gain e4000_if_gain_lut[] = {
+ {0x00, 0x00},
+ {0x20, 0x00},
+ {0x40, 0x00},
+ {0x02, 0x00},
+ {0x22, 0x00},
+ {0x42, 0x00},
+ {0x04, 0x00},
+ {0x24, 0x00},
+ {0x44, 0x00},
+ {0x01, 0x00},
+ {0x21, 0x00},
+ {0x41, 0x00},
+ {0x03, 0x00},
+ {0x23, 0x00},
+ {0x43, 0x00},
+ {0x05, 0x00},
+ {0x25, 0x00},
+ {0x45, 0x00},
+ {0x07, 0x00},
+ {0x27, 0x00},
+ {0x47, 0x00},
+ {0x0f, 0x00},
+ {0x2f, 0x00},
+ {0x4f, 0x00},
+ {0x17, 0x00},
+ {0x37, 0x00},
+ {0x57, 0x00},
+ {0x1f, 0x00},
+ {0x3f, 0x00},
+ {0x5f, 0x00},
+ {0x1f, 0x01},
+ {0x3f, 0x01},
+ {0x5f, 0x01},
+ {0x1f, 0x02},
+ {0x3f, 0x02},
+ {0x5f, 0x02},
+ {0x1f, 0x03},
+ {0x3f, 0x03},
+ {0x5f, 0x03},
+ {0x1f, 0x04},
+ {0x3f, 0x04},
+ {0x5f, 0x04},
+ {0x1f, 0x0c},
+ {0x3f, 0x0c},
+ {0x5f, 0x0c},
+ {0x1f, 0x14},
+ {0x3f, 0x14},
+ {0x5f, 0x14},
+ {0x1f, 0x1c},
+ {0x3f, 0x1c},
+ {0x5f, 0x1c},
+ {0x1f, 0x24},
+ {0x3f, 0x24},
+ {0x5f, 0x24},
+ {0x7f, 0x24},
+};
+
#endif
--
1.8.5.3
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