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V4L/DVB (11064): au8522: make use of hybrid framework so analog/digital demod can share state

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Make use of the hybrid tuner framework so the analog and digital parts of the
au8522 demodulator can make use of the same shared state.

Thanks to Michael Krufky <mkrufky@linuxtv.org> and Steven Toth
<stoth@linuxtv.org> for providing sample hardware, engineering level support,
and testing.

Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2009-03-11 03:00:36 -03:00 committed by Mauro Carvalho Chehab
parent 7bf63eda68
commit 209fdf66b8
2 changed files with 46 additions and 7 deletions
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45
drivers/media/dvb/frontends/au8522_dig.c
View File

@ -31,6 +31,10 @@
static int debug;
/* Despite the name "hybrid_tuner", the framework works just as well for
hybrid demodulators as well... */
static LIST_HEAD(hybrid_tuner_instance_list);
#define dprintk(arg...) do { \
if (debug) \
printk(arg); \
@ -786,23 +790,50 @@ static int au8522_get_tune_settings(struct dvb_frontend *fe,
return 0;
}
static struct dvb_frontend_ops au8522_ops;
int au8522_get_state(struct au8522_state **state, struct i2c_adapter *i2c,
u8 client_address)
{
return hybrid_tuner_request_state(struct au8522_state, (*state),
hybrid_tuner_instance_list,
i2c, client_address, "au8522");
}
void au8522_release_state(struct au8522_state *state)
{
if (state != NULL)
hybrid_tuner_release_state(state);
}
static void au8522_release(struct dvb_frontend *fe)
{
struct au8522_state *state = fe->demodulator_priv;
kfree(state);
au8522_release_state(state);
}
static struct dvb_frontend_ops au8522_ops;
struct dvb_frontend *au8522_attach(const struct au8522_config *config,
struct i2c_adapter *i2c)
{
struct au8522_state *state = NULL;
int instance;
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct au8522_state), GFP_KERNEL);
if (state == NULL)
goto error;
instance = au8522_get_state(&state, i2c, config->demod_address);
switch (instance) {
case 0:
dprintk("%s state allocation failed\n", __func__);
break;
case 1:
/* new demod instance */
dprintk("%s using new instance\n", __func__);
break;
default:
/* existing demod instance */
dprintk("%s using existing instance\n", __func__);
break;
}
/* setup the state */
state->config = config;
@ -824,7 +855,7 @@ struct dvb_frontend *au8522_attach(const struct au8522_config *config,
return &state->frontend;
error:
kfree(state);
au8522_release_state(state);
return NULL;
}
EXPORT_SYMBOL(au8522_attach);

8
drivers/media/dvb/frontends/au8522_priv.h
View File

@ -37,6 +37,10 @@
struct au8522_state {
struct i2c_adapter *i2c;
/* Used for sharing of the state between analog and digital mode */
struct tuner_i2c_props i2c_props;
struct list_head hybrid_tuner_instance_list;
/* configuration settings */
const struct au8522_config *config;
@ -55,3 +59,7 @@ int au8522_writereg(struct au8522_state *state, u16 reg, u8 data);
u8 au8522_readreg(struct au8522_state *state, u16 reg);
int au8522_init(struct dvb_frontend *fe);
int au8522_sleep(struct dvb_frontend *fe);
int au8522_get_state(struct au8522_state **state, struct i2c_adapter *i2c,
u8 client_address);
void au8522_release_state(struct au8522_state *state);