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Code Issues Releases Wiki Activity

V4L/DVB (5485): Tda827x: delayed probing of tuner version

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When the tuner is attached, the tda10046 is not initilized yet, so it
is searching for its firmware. If the tuner is attached to the tda10046
silent i2c port, a bus collision can occur. Now the version is probed
during the first init or sleep call.

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hartmut Hackmann 2007-03-23 21:00:07 -03:00 committed by Mauro Carvalho Chehab
parent e65ec752ce
commit 9971f4f1d3
2 changed files with 55 additions and 32 deletions
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85
drivers/media/dvb/frontends/tda827x.c
View file

@ -91,6 +91,7 @@ static int tda827xo_set_params(struct dvb_frontend *fe,
int i, tuner_freq, if_freq;
u32 N;
dprintk("%s:\n", __FUNCTION__);
switch (params->u.ofdm.bandwidth) {
case BANDWIDTH_6_MHZ:
if_freq = 4000000;
@ -159,6 +160,7 @@ static int tda827xo_sleep(struct dvb_frontend *fe)
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
dprintk("%s:\n", __FUNCTION__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
@ -222,6 +224,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
int i, tuner_freq, if_freq;
u32 N;
dprintk("%s:\n", __FUNCTION__);
if (priv->cfg && priv->cfg->lna_gain)
priv->cfg->lna_gain(fe, 1);
msleep(20);
@ -350,6 +353,7 @@ static int tda827xa_sleep(struct dvb_frontend *fe)
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
dprintk("%s:\n", __FUNCTION__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
@ -388,13 +392,32 @@ static int tda827x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
static int tda827x_init(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
dprintk("%s:\n", __FUNCTION__);
if (priv->cfg && priv->cfg->init)
priv->cfg->init(fe);
return 0;
}
static int tda827x_probe_version(struct dvb_frontend *fe);
static int tda827x_initial_init(struct dvb_frontend *fe)
{
int ret;
ret = tda827x_probe_version(fe);
if (ret)
return ret;
return fe->ops.tuner_ops.init(fe);
}
static int tda827x_initial_sleep(struct dvb_frontend *fe)
{
int ret;
ret = tda827x_probe_version(fe);
if (ret)
return ret;
return fe->ops.tuner_ops.sleep(fe);
}
static struct dvb_tuner_ops tda827xo_tuner_ops = {
.info = {
@ -404,8 +427,8 @@ static struct dvb_tuner_ops tda827xo_tuner_ops = {
.frequency_step = 250000
},
.release = tda827x_release,
.init = tda827x_init,
.sleep = tda827xo_sleep,
.init = tda827x_initial_init,
.sleep = tda827x_initial_sleep,
.set_params = tda827xo_set_params,
.get_frequency = tda827x_get_frequency,
.get_bandwidth = tda827x_get_bandwidth,
@ -426,26 +449,36 @@ static struct dvb_tuner_ops tda827xa_tuner_ops = {
.get_bandwidth = tda827x_get_bandwidth,
};
static int tda827x_probe_version(struct dvb_frontend *fe)
{ u8 data;
struct tda827x_priv *priv = fe->tuner_priv;
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
.buf = &data, .len = 1 };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
printk("%s: could not read from tuner at addr: 0x%02x\n",
__FUNCTION__, msg.addr << 1);
return -EIO;
}
if ((data & 0x3c) == 0) {
dprintk("tda827x tuner found\n");
fe->ops.tuner_ops.init = tda827x_init;
fe->ops.tuner_ops.sleep = tda827xo_sleep;
} else {
dprintk("tda827xa tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
}
return 0;
}
struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
struct i2c_adapter *i2c,
struct tda827x_config *cfg)
{
struct tda827x_priv *priv = NULL;
u8 data;
u8 sb_msg[] = { 0x30, 0xd0 };
struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD,
.buf = &data, .len = 1 };
dprintk("%s:\n", __FUNCTION__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(i2c, &msg, 1) != 1) {
printk("%s: could not read from tuner at addr: 0x%02x\n",
__FUNCTION__, addr << 1);
return NULL;
}
priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
@ -453,25 +486,13 @@ struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
priv->i2c_addr = addr;
priv->i2c_adap = i2c;
priv->cfg = cfg;
memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));
msg.flags = 0;
msg.buf = sb_msg;
msg.len = sizeof(sb_msg);
if ((data & 0x3c) == 0) {
dprintk("tda827x tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));
} else {
dprintk("tda827xa tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
sb_msg[1] = 0x90;
}
fe->tuner_priv = priv;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(i2c, &msg, 1);
return fe;
}
EXPORT_SYMBOL(tda827x_attach);
module_param(debug, int, 0644);

2
drivers/media/video/saa7134/saa7134-dvb.c
View file

@ -1177,6 +1177,8 @@ static int dvb_init(struct saa7134_dev *dev)
dev->dvb.frontend->ops.init(dev->dvb.frontend);
if (dev->dvb.frontend->ops.sleep)
dev->dvb.frontend->ops.sleep(dev->dvb.frontend);
if (dev->dvb.frontend->ops.tuner_ops.sleep)
dev->dvb.frontend->ops.tuner_ops.sleep(dev->dvb.frontend);
}
return ret;
}