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path: root/drivers/media/dvb/frontends
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Diffstat (limited to 'drivers/media/dvb/frontends')
-rw-r--r--drivers/media/dvb/frontends/dvb-pll.c39
-rw-r--r--drivers/media/dvb/frontends/dvb-pll.h1
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/dvb-pll.c b/drivers/media/dvb/frontends/dvb-pll.c
index 43084bfc0f1..e7978442fbe 100644
--- a/drivers/media/dvb/frontends/dvb-pll.c
+++ b/drivers/media/dvb/frontends/dvb-pll.c
@@ -27,6 +27,17 @@
/* ----------------------------------------------------------- */
/* descriptions */
+/* Set AGC TOP value to 103 dBuV:
+ 0x80 = Control Byte
+ 0x40 = 250 uA charge pump (irrelevant)
+ 0x18 = Aux Byte to follow
+ 0x06 = 64.5 kHz divider (irrelevant)
+ 0x01 = Disable Vt (aka sleep)
+
+ 0x00 = AGC Time constant 2s Iagc = 300 nA (vs 0x80 = 9 nA)
+ 0x50 = AGC Take over point = 103 dBuV */
+static u8 tua603x_agc103[] = { 2, 0x80|0x40|0x18|0x06|0x01, 0x00|0x50 };
+
struct dvb_pll_desc dvb_pll_thomson_dtt7579 = {
.name = "Thomson dtt7579",
.min = 177000000,
@@ -113,6 +124,7 @@ struct dvb_pll_desc dvb_pll_thomson_dtt761x = {
.min = 57000000,
.max = 863000000,
.count = 3,
+ .initdata = tua603x_agc103,
.entries = {
{ 147000000, 44000000, 62500, 0x8e, 0x39 },
{ 417000000, 44000000, 62500, 0x8e, 0x3a },
@@ -599,6 +611,31 @@ static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
return 0;
}
+static int dvb_pll_init(struct dvb_frontend *fe)
+{
+ struct dvb_pll_priv *priv = fe->tuner_priv;
+
+ if (priv->i2c == NULL)
+ return -EINVAL;
+
+ if (priv->pll_desc->initdata) {
+ struct i2c_msg msg = { .flags = 0,
+ .addr = priv->pll_i2c_address,
+ .buf = priv->pll_desc->initdata + 1,
+ .len = priv->pll_desc->initdata[0] };
+
+ int result;
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+ if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
+ return result;
+ }
+ return 0;
+ }
+ /* Shouldn't be called when initdata is NULL, maybe BUG()? */
+ return -EINVAL;
+}
+
static struct dvb_tuner_ops dvb_pll_tuner_ops = {
.release = dvb_pll_release,
.sleep = dvb_pll_sleep,
@@ -644,6 +681,8 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr,
sizeof(fe->ops.tuner_ops.info.name));
fe->ops.tuner_ops.info.frequency_min = desc->min;
fe->ops.tuner_ops.info.frequency_min = desc->max;
+ if (desc->initdata)
+ fe->ops.tuner_ops.init = dvb_pll_init;
fe->tuner_priv = priv;
return fe;
diff --git a/drivers/media/dvb/frontends/dvb-pll.h b/drivers/media/dvb/frontends/dvb-pll.h
index a5bd928d420..bb79a78151f 100644
--- a/drivers/media/dvb/frontends/dvb-pll.h
+++ b/drivers/media/dvb/frontends/dvb-pll.h
@@ -13,6 +13,7 @@ struct dvb_pll_desc {
u32 min;
u32 max;
void (*setbw)(u8 *buf, u32 freq, int bandwidth);
+ u8 *initdata;
int count;
struct {
u32 limit;