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V4L/DVB (6977): tda18271: clean up calibration initialization procedures

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Always initialize registers during attach.

Perform IR Calibration during init if needed.
Perform RF Calibration during init if needed for C2, only.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-01-05 20:00:09 -03:00 committed by Mauro Carvalho Chehab
parent 98512f7b36
commit 09f83c4fc0
2 changed files with 23 additions and 15 deletions
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37
drivers/media/dvb/frontends/tda18271-fe.c
View File

@ -29,7 +29,7 @@ MODULE_PARM_DESC(debug, "set debug level "
/*---------------------------------------------------------------------*/
static int tda18271_init(struct dvb_frontend *fe)
static int tda18271_ir_cal_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
@ -184,7 +184,7 @@ static int tda18271_read_thermometer(struct dvb_frontend *fe)
}
static int tda18271_rf_tracking_filters_correction(struct dvb_frontend *fe,
u32 freq, int tm_rfcal)
u32 freq)
{
struct tda18271_priv *priv = fe->tuner_priv;
struct tda18271_rf_tracking_filter_cal *map = priv->rf_cal_state;
@ -224,7 +224,7 @@ static int tda18271_rf_tracking_filters_correction(struct dvb_frontend *fe,
tda18271_lookup_map(fe, RF_CAL_DC_OVER_DT, &freq, &dc_over_dt);
/* calculate temperature compensation */
rfcal_comp = dc_over_dt * (tm_current - tm_rfcal);
rfcal_comp = dc_over_dt * (tm_current - priv->tm_rfcal);
regs[R_EB14] = approx + rfcal_comp;
tda18271_write_regs(fe, R_EB14, 1);
@ -554,8 +554,7 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
return 0;
}
static int tda18271_calc_rf_filter_curve(struct dvb_frontend *fe,
int *tm_rfcal)
static int tda18271_calc_rf_filter_curve(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned int i;
@ -572,24 +571,21 @@ static int tda18271_calc_rf_filter_curve(struct dvb_frontend *fe,
tda18271_rf_tracking_filters_init(fe, 1000 *
priv->rf_cal_state[i].rfmax);
*tm_rfcal = tda18271_read_thermometer(fe);
priv->tm_rfcal = tda18271_read_thermometer(fe);
return 0;
}
/* ------------------------------------------------------------------ */
static int tda18271_init_cal(struct dvb_frontend *fe, int *tm)
static int tda18271_rf_cal_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
if (priv->cal_initialized)
return 0;
/* initialization */
tda18271_init(fe);
tda18271_calc_rf_filter_curve(fe, tm);
tda18271_calc_rf_filter_curve(fe);
tda18271_por(fe);
@ -598,16 +594,27 @@ static int tda18271_init_cal(struct dvb_frontend *fe, int *tm)
return 0;
}
static int tda18271_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
/* initialization */
tda18271_ir_cal_init(fe);
if (priv->id == TDA18271HDC2)
tda18271_rf_cal_init(fe);
return 0;
}
static int tda18271c2_tune(struct dvb_frontend *fe,
u32 ifc, u32 freq, u32 bw, u8 std)
{
int tm = 0;
tda_dbg("freq = %d, ifc = %d\n", freq, ifc);
tda18271_init_cal(fe, &tm);
tda18271_init(fe);
tda18271_rf_tracking_filters_correction(fe, freq, tm);
tda18271_rf_tracking_filters_correction(fe, freq);
tda18271_channel_configuration(fe, ifc, freq, bw, std);

1
drivers/media/dvb/frontends/tda18271-priv.h
View File

@ -105,6 +105,7 @@ struct tda18271_priv {
enum tda18271_i2c_gate gate;
enum tda18271_ver id;
unsigned int tm_rfcal;
unsigned int cal_initialized:1;
struct tda18271_map_layout *maps;