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V4L/DVB (10876): tda18271: add support for AGC configuration via tuner callback 

The tda827x driver supports a feature that the tda18271 driver was lacking
until now.  This patch adds support for device-level configuration via the
tuner callback configuration interface.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2009-03-04 19:42:06 -03:00 committed by Mauro Carvalho Chehab
parent 3160fbc556
commit adcc4b3e75
4 changed files with 49 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/media/common/tuners/tda18271-fe.c
View File

@ -818,6 +818,38 @@ static int tda18271_init(struct dvb_frontend *fe)
return ret;
}
/* ------------------------------------------------------------------ */
static int tda18271_agc(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
int ret = 0;
switch (priv->config) {
case 0:
/* no LNA */
tda_dbg("no agc configuration provided\n");
break;
case 3:
/* switch with GPIO of saa713x */
tda_dbg("invoking callback\n");
if (fe->callback)
ret = fe->callback(priv->i2c_props.adap->algo_data,
DVB_FRONTEND_COMPONENT_TUNER,
TDA18271_CALLBACK_CMD_AGC_ENABLE,
priv->mode);
break;
case 1:
case 2:
default:
/* n/a - currently not supported */
tda_err("unsupported configuration: %d\n", priv->config);
ret = -EINVAL;
break;
}
return ret;
}
static int tda18271_tune(struct dvb_frontend *fe,
struct tda18271_std_map_item *map, u32 freq, u32 bw)
{
@ -827,6 +859,10 @@ static int tda18271_tune(struct dvb_frontend *fe,
tda_dbg("freq = %d, ifc = %d, bw = %d, agc_mode = %d, std = %d\n",
freq, map->if_freq, bw, map->agc_mode, map->std);
ret = tda18271_agc(fe);
if (tda_fail(ret))
tda_warn("failed to configure agc\n");
ret = tda18271_init(fe);
if (tda_fail(ret))
goto fail;
@ -1159,6 +1195,7 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr,
/* new tuner instance */
priv->gate = (cfg) ? cfg->gate : TDA18271_GATE_AUTO;
priv->role = (cfg) ? cfg->role : TDA18271_MASTER;
priv->config = (cfg) ? cfg->config : 0;
priv->cal_initialized = false;
mutex_init(&priv->lock);

6
drivers/media/common/tuners/tda18271-priv.h
View File

@ -91,11 +91,6 @@ enum tda18271_pll {
TDA18271_CAL_PLL,
};
enum tda18271_mode {
TDA18271_ANALOG,
TDA18271_DIGITAL,
};
struct tda18271_map_layout;
enum tda18271_ver {
@ -114,6 +109,7 @@ struct tda18271_priv {
enum tda18271_i2c_gate gate;
enum tda18271_ver id;
unsigned int config; /* interface to saa713x / tda829x */
unsigned int tm_rfcal;
unsigned int cal_initialized:1;
unsigned int small_i2c:1;

10
drivers/media/common/tuners/tda18271.h
View File

@ -79,6 +79,16 @@ struct tda18271_config {
/* some i2c providers cant write all 39 registers at once */
unsigned int small_i2c:1;
/* interface to saa713x / tda829x */
unsigned int config;
};
#define TDA18271_CALLBACK_CMD_AGC_ENABLE 0
enum tda18271_mode {
TDA18271_ANALOG = 0,
TDA18271_DIGITAL,
};
#if defined(CONFIG_MEDIA_TUNER_TDA18271) || (defined(CONFIG_MEDIA_TUNER_TDA18271_MODULE) && defined(MODULE))

1
drivers/media/common/tuners/tda8290.c
View File

@ -624,6 +624,7 @@ static int tda829x_find_tuner(struct dvb_frontend *fe)
if ((data == 0x83) || (data == 0x84)) {
priv->ver |= TDA18271;
tda829x_tda18271_config.config = priv->cfg.config;
dvb_attach(tda18271_attach, fe, priv->tda827x_addr,
priv->i2c_props.adap, &tda829x_tda18271_config);
} else {