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authorAntti Palosaari <crope@iki.fi>2008-09-15 14:34:31 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2008-10-12 09:37:02 -0200
commit6e623433f7f566d8aca64c519a19c2f7bbb686be (patch)
treeac108a7fa65cd15560387d9c4e6b6a691254cfb3 /drivers/media/common/tuners
parentef80bfeb30f82fb718731a3323a75ae08396a4ea (diff)
V4L/DVB (8970): mt2060: implement I2C-gate control
- implement I2C-gate control Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common/tuners')
-rw-r--r--drivers/media/common/tuners/mt2060.c38
1 files changed, 36 insertions, 2 deletions
diff --git a/drivers/media/common/tuners/mt2060.c b/drivers/media/common/tuners/mt2060.c
index 1305b0e63ce..12206d75dd4 100644
--- a/drivers/media/common/tuners/mt2060.c
+++ b/drivers/media/common/tuners/mt2060.c
@@ -170,6 +170,9 @@ static int mt2060_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
b[0] = REG_LO1B1;
b[1] = 0xFF;
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
mt2060_writeregs(priv,b,2);
freq = params->frequency / 1000; // Hz -> kHz
@@ -233,6 +236,9 @@ static int mt2060_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
i++;
} while (i<10);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
return ret;
}
@@ -296,13 +302,35 @@ static int mt2060_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
static int mt2060_init(struct dvb_frontend *fe)
{
struct mt2060_priv *priv = fe->tuner_priv;
- return mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x33);
+ int ret;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
+ ret = mt2060_writereg(priv, REG_VGAG,
+ (priv->cfg->clock_out << 6) | 0x33);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
+ return ret;
}
static int mt2060_sleep(struct dvb_frontend *fe)
{
struct mt2060_priv *priv = fe->tuner_priv;
- return mt2060_writereg(priv, REG_VGAG, (priv->cfg->clock_out << 6) | 0x30);
+ int ret;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
+ ret = mt2060_writereg(priv, REG_VGAG,
+ (priv->cfg->clock_out << 6) | 0x30);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
+ return ret;
}
static int mt2060_release(struct dvb_frontend *fe)
@@ -344,6 +372,9 @@ struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter
priv->i2c = i2c;
priv->if1_freq = if1;
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
if (mt2060_readreg(priv,REG_PART_REV,&id) != 0) {
kfree(priv);
return NULL;
@@ -360,6 +391,9 @@ struct dvb_frontend * mt2060_attach(struct dvb_frontend *fe, struct i2c_adapter
mt2060_calibrate(priv);
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
return fe;
}
EXPORT_SYMBOL(mt2060_attach);