leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[media] tda8290: Allow disabling I2C gate

Browse Source 
Allow disabling I2C gate handling by external configuration.
This is required by cards that have all devices on a single I2C bus,
like AverMedia A706.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Ondrej Zary 2013-02-03 22:47:38 -03:00 committed by Mauro Carvalho Chehab
parent 48a8a03b58
commit 2f719f7a9a
2 changed files with 30 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
drivers/media/tuners/tda8290.c
View File

@ -233,7 +233,8 @@ static void tda8290_set_params(struct dvb_frontend *fe,
}
tda8290_i2c_bridge(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
if (fe->ops.tuner_ops.set_analog_params)
fe->ops.tuner_ops.set_analog_params(fe, params);
@ -302,7 +303,8 @@ static void tda8290_set_params(struct dvb_frontend *fe,
}
}
tda8290_i2c_bridge(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
}
@ -424,7 +426,8 @@ static void tda8295_set_params(struct dvb_frontend *fe,
tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
msleep(20);
tda8295_i2c_bridge(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
if (fe->ops.tuner_ops.set_analog_params)
fe->ops.tuner_ops.set_analog_params(fe, params);
@ -437,7 +440,8 @@ static void tda8295_set_params(struct dvb_frontend *fe,
else
tuner_dbg("tda8295 not locked, no signal?\n");
tda8295_i2c_bridge(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
}
/*---------------------------------------------------------------------*/
@ -465,11 +469,13 @@ static void tda8290_standby(struct dvb_frontend *fe)
unsigned char tda8290_agc_tri[] = { 0x02, 0x20 };
struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2};
tda8290_i2c_bridge(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
if (priv->ver & TDA8275A)
cb1[1] = 0x90;
i2c_transfer(priv->i2c_props.adap, &msg, 1);
tda8290_i2c_bridge(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2);
tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2);
}
@ -537,9 +543,11 @@ static void tda8290_init_tuner(struct dvb_frontend *fe)
if (priv->ver & TDA8275A)
msg.buf = tda8275a_init;
tda8290_i2c_bridge(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_props.adap, &msg, 1);
tda8290_i2c_bridge(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
}
/*---------------------------------------------------------------------*/
@ -565,19 +573,13 @@ static struct tda18271_config tda829x_tda18271_config = {
static int tda829x_find_tuner(struct dvb_frontend *fe)
{
struct tda8290_priv *priv = fe->analog_demod_priv;
struct analog_demod_ops *analog_ops = &fe->ops.analog_ops;
int i, ret, tuners_found;
u32 tuner_addrs;
u8 data;
struct i2c_msg msg = { .flags = I2C_M_RD, .buf = &data, .len = 1 };
if (!analog_ops->i2c_gate_ctrl) {
printk(KERN_ERR "tda8290: no gate control were provided!\n");
return -EINVAL;
}
analog_ops->i2c_gate_ctrl(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
/* probe for tuner chip */
tuners_found = 0;
@ -595,7 +597,8 @@ static int tda829x_find_tuner(struct dvb_frontend *fe)
give a response now
*/
analog_ops->i2c_gate_ctrl(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
if (tuners_found > 1)
for (i = 0; i < tuners_found; i++) {
@ -618,12 +621,14 @@ static int tda829x_find_tuner(struct dvb_frontend *fe)
priv->tda827x_addr = tuner_addrs;
msg.addr = tuner_addrs;
analog_ops->i2c_gate_ctrl(fe, 1);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer(priv->i2c_props.adap, &msg, 1);
if (ret != 1) {
tuner_warn("tuner access failed!\n");
analog_ops->i2c_gate_ctrl(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
return -EREMOTEIO;
}
@ -648,7 +653,8 @@ static int tda829x_find_tuner(struct dvb_frontend *fe)
if (fe->ops.tuner_ops.sleep)
fe->ops.tuner_ops.sleep(fe);
analog_ops->i2c_gate_ctrl(fe, 0);
if (fe->ops.analog_ops.i2c_gate_ctrl)
fe->ops.analog_ops.i2c_gate_ctrl(fe, 0);
return 0;
}
@ -755,6 +761,9 @@ struct dvb_frontend *tda829x_attach(struct dvb_frontend *fe,
sizeof(struct analog_demod_ops));
}
if (cfg && cfg->no_i2c_gate)
fe->ops.analog_ops.i2c_gate_ctrl = NULL;
if (!(cfg) || (TDA829X_PROBE_TUNER == cfg->probe_tuner)) {
tda8295_power(fe, 1);
if (tda829x_find_tuner(fe) < 0)

1
drivers/media/tuners/tda8290.h
View File

@ -26,6 +26,7 @@ struct tda829x_config {
unsigned int probe_tuner:1;
#define TDA829X_PROBE_TUNER 0
#define TDA829X_DONT_PROBE 1
unsigned int no_i2c_gate:1;
};
#if IS_ENABLED(CONFIG_MEDIA_TUNER_TDA8290)