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authorOlli Salonen <olli.salonen@iki.fi>2015-02-28 12:25:23 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-03-03 10:35:08 -0300
commitc28aebe178a403f0e8632a283bc4d683b0c93e83 (patch)
tree5d3c58db7643e552dcf54546c44aa99cc23d12f0
parent95f22c5aaed3415ff4a2df6a1ff76b3127123430 (diff)
[media] si2157: IF frequency for ATSC and QAM
For supporting ATSC and QAM modes the driver should use a smaller IF frequency than 5 MHz. Signed-off-by: Olli Salonen <olli.salonen@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
-rw-r--r--drivers/media/tuners/si2157.c23
-rw-r--r--drivers/media/tuners/si2157_priv.h1
2 files changed, 23 insertions, 1 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index fcf139dfdec6..d8309b9de21e 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -244,6 +244,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
int ret;
struct si2157_cmd cmd;
u8 bandwidth, delivery_system;
+ u32 if_frequency = 5000000;
dev_dbg(&client->dev,
"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
@@ -266,9 +267,11 @@ static int si2157_set_params(struct dvb_frontend *fe)
switch (c->delivery_system) {
case SYS_ATSC:
delivery_system = 0x00;
+ if_frequency = 3250000;
break;
case SYS_DVBC_ANNEX_B:
delivery_system = 0x10;
+ if_frequency = 4000000;
break;
case SYS_DVBT:
case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
@@ -302,6 +305,20 @@ static int si2157_set_params(struct dvb_frontend *fe)
if (ret)
goto err;
+ /* set if frequency if needed */
+ if (if_frequency != dev->if_frequency) {
+ memcpy(cmd.args, "\x14\x00\x06\x07", 4);
+ cmd.args[4] = (if_frequency / 1000) & 0xff;
+ cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
+ cmd.wlen = 6;
+ cmd.rlen = 4;
+ ret = si2157_cmd_execute(client, &cmd);
+ if (ret)
+ goto err;
+
+ dev->if_frequency = if_frequency;
+ }
+
/* set frequency */
memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
cmd.args[4] = (c->frequency >> 0) & 0xff;
@@ -322,7 +339,10 @@ err:
static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
- *frequency = 5000000; /* default value of property 0x0706 */
+ struct i2c_client *client = fe->tuner_priv;
+ struct si2157_dev *dev = i2c_get_clientdata(client);
+
+ *frequency = dev->if_frequency;
return 0;
}
@@ -360,6 +380,7 @@ static int si2157_probe(struct i2c_client *client,
dev->inversion = cfg->inversion;
dev->fw_loaded = false;
dev->chiptype = (u8)id->driver_data;
+ dev->if_frequency = 5000000; /* default value of property 0x0706 */
mutex_init(&dev->i2c_mutex);
/* check if the tuner is there */
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index 7aa53bce5593..cd8fa5b25304 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -28,6 +28,7 @@ struct si2157_dev {
bool fw_loaded;
bool inversion;
u8 chiptype;
+ u32 if_frequency;
};
#define SI2157_CHIPTYPE_SI2157 0

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