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V4L/DVB (7838): tda18271: fix error handling in tda18271c2_rf_cal_init path 

fix error handling in tda18271c2_rf_cal_init immediate path

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-05-03 19:28:00 -03:00 committed by Mauro Carvalho Chehab
parent d35fccaffd
commit 24124f784b
1 changed files with 47 additions and 21 deletions
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68
drivers/media/common/tuners/tda18271-fe.c
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@ -259,26 +259,33 @@ static int tda18271_por(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int ret;
/* power up detector 1 */
regs[R_EB12] &= ~0x20;
tda18271_write_regs(fe, R_EB12, 1);
ret = tda18271_write_regs(fe, R_EB12, 1);
if (ret < 0)
goto fail;
regs[R_EB18] &= ~0x80; /* turn agc1 loop on */
regs[R_EB18] &= ~0x03; /* set agc1_gain to 6 dB */
tda18271_write_regs(fe, R_EB18, 1);
ret = tda18271_write_regs(fe, R_EB18, 1);
if (ret < 0)
goto fail;
regs[R_EB21] |= 0x03; /* set agc2_gain to -6 dB */
/* POR mode */
tda18271_set_standby_mode(fe, 1, 0, 0);
ret = tda18271_set_standby_mode(fe, 1, 0, 0);
if (ret < 0)
goto fail;
/* disable 1.5 MHz low pass filter */
regs[R_EB23] &= ~0x04; /* forcelp_fc2_en = 0 */
regs[R_EB23] &= ~0x02; /* XXX: lp_fc[2] = 0 */
tda18271_write_regs(fe, R_EB21, 3);
return 0;
ret = tda18271_write_regs(fe, R_EB21, 3);
fail:
return ret;
}
static int tda18271_calibrate_rf(struct dvb_frontend *fe, u32 freq)
@ -389,7 +396,7 @@ static int tda18271_powerscan(struct dvb_frontend *fe,
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int sgn, bcal, count, wait;
int sgn, bcal, count, wait, ret;
u8 cid_target;
u16 count_limit;
u32 freq;
@ -421,7 +428,9 @@ static int tda18271_powerscan(struct dvb_frontend *fe,
tda18271_write_regs(fe, R_EP2, 1);
/* read power detection info, stored in EB10 */
tda18271_read_extended(fe);
ret = tda18271_read_extended(fe);
if (ret < 0)
return ret;
/* algorithm initialization */
sgn = 1;
@ -447,7 +456,9 @@ static int tda18271_powerscan(struct dvb_frontend *fe,
tda18271_write_regs(fe, R_EP2, 1);
/* read power detection info, stored in EB10 */
tda18271_read_extended(fe);
ret = tda18271_read_extended(fe);
if (ret < 0)
return ret;
count += 200;
@ -478,6 +489,7 @@ static int tda18271_powerscan_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int ret;
/* set standard to digital */
regs[R_EP3] &= ~0x1f; /* clear std bits */
@ -489,10 +501,14 @@ static int tda18271_powerscan_init(struct dvb_frontend *fe)
/* update IF output level & IF notch frequency */
regs[R_EP4] &= ~0x1c; /* clear if level bits */
tda18271_write_regs(fe, R_EP3, 2);
ret = tda18271_write_regs(fe, R_EP3, 2);
if (ret < 0)
goto fail;
regs[R_EB18] &= ~0x03; /* set agc1_gain to 6 dB */
tda18271_write_regs(fe, R_EB18, 1);
ret = tda18271_write_regs(fe, R_EB18, 1);
if (ret < 0)
goto fail;
regs[R_EB21] &= ~0x03; /* set agc2_gain to -15 dB */
@ -500,9 +516,9 @@ static int tda18271_powerscan_init(struct dvb_frontend *fe)
regs[R_EB23] |= 0x04; /* forcelp_fc2_en = 1 */
regs[R_EB23] |= 0x02; /* lp_fc[2] = 1 */
tda18271_write_regs(fe, R_EB21, 3);
return 0;
ret = tda18271_write_regs(fe, R_EB21, 3);
fail:
return ret;
}
static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
@ -535,6 +551,8 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
/* look for optimized calibration frequency */
bcal = tda18271_powerscan(fe, &rf_default[rf], &rf_freq[rf]);
if (bcal < 0)
return bcal;
tda18271_calc_rf_cal(fe, &rf_freq[rf]);
prog_tab[rf] = regs[R_EB14];
@ -575,13 +593,16 @@ static int tda18271_calc_rf_filter_curve(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned int i;
int ret;
tda_info("tda18271: performing RF tracking filter calibration\n");
/* wait for die temperature stabilization */
msleep(200);
tda18271_powerscan_init(fe);
ret = tda18271_powerscan_init(fe);
if (ret < 0)
goto fail;
/* rf band calibration */
for (i = 0; priv->rf_cal_state[i].rfmax != 0; i++)
@ -589,8 +610,8 @@ static int tda18271_calc_rf_filter_curve(struct dvb_frontend *fe)
priv->rf_cal_state[i].rfmax);
priv->tm_rfcal = tda18271_read_thermometer(fe);
return 0;
fail:
return ret;
}
/* ------------------------------------------------------------------ */
@ -599,6 +620,7 @@ static int tda18271c2_rf_cal_init(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int ret;
/* test RF_CAL_OK to see if we need init */
if ((regs[R_EP1] & 0x10) == 0)
@ -607,15 +629,19 @@ static int tda18271c2_rf_cal_init(struct dvb_frontend *fe)
if (priv->cal_initialized)
return 0;
tda18271_calc_rf_filter_curve(fe);
ret = tda18271_calc_rf_filter_curve(fe);
if (ret < 0)
goto fail;
tda18271_por(fe);
ret = tda18271_por(fe);
if (ret < 0)
goto fail;
tda_info("tda18271: RF tracking filter calibration complete\n");
priv->cal_initialized = true;
return 0;
fail:
return ret;
}
static int tda18271c1_rf_tracking_filter_calibration(struct dvb_frontend *fe,