openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[media] rtl2832: properly set en_bbin for r820t 

DVBT_EN_BBIN should be set on both places where IF is set. So,
move it to a function and call it where needed.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2013-04-09 22:16:52 -03:00
parent a7dd065f49
commit 884655ad2e
1 changed files with 31 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/media/dvb-frontends/rtl2832.c
View File

@ -380,13 +380,37 @@ static int rtl2832_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
return ret;
}
static int rtl2832_set_if(struct dvb_frontend *fe, u32 if_freq)
{
struct rtl2832_priv *priv = fe->demodulator_priv;
int ret;
u64 pset_iffreq;
u8 en_bbin = (if_freq == 0 ? 0x1 : 0x0);
/*
* PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
* / CrystalFreqHz)
*/
pset_iffreq = if_freq % priv->cfg.xtal;
pset_iffreq *= 0x400000;
pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
pset_iffreq = pset_iffreq & 0x3fffff;
ret = rtl2832_wr_demod_reg(priv, DVBT_EN_BBIN, en_bbin);
if (ret)
return ret;
ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
return (ret);
}
static int rtl2832_init(struct dvb_frontend *fe)
{
struct rtl2832_priv *priv = fe->demodulator_priv;
int i, ret, len;
u8 en_bbin;
u64 pset_iffreq;
const struct rtl2832_reg_value *init;
int i, ret, len;
/* initialization values for the demodulator registers */
struct rtl2832_reg_value rtl2832_initial_regs[] = {
@ -436,8 +460,6 @@ static int rtl2832_init(struct dvb_frontend *fe)
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
en_bbin = (priv->cfg.if_dvbt == 0 ? 0x1 : 0x0);
for (i = 0; i < ARRAY_SIZE(rtl2832_initial_regs); i++) {
ret = rtl2832_wr_demod_reg(priv, rtl2832_initial_regs[i].reg,
rtl2832_initial_regs[i].value);
@ -477,27 +499,10 @@ static int rtl2832_init(struct dvb_frontend *fe)
goto err;
}
/*
* if frequency settings
* Some tuners (r820t) don't initialize IF here; instead; they do it
* at set_params()
*/
if (!fe->ops.tuner_ops.get_if_frequency) {
/*
* PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
* / CrystalFreqHz)
*/
pset_iffreq = priv->cfg.if_dvbt % priv->cfg.xtal;
pset_iffreq *= 0x400000;
pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
pset_iffreq = pset_iffreq & 0x3fffff;
ret = rtl2832_wr_demod_reg(priv, DVBT_EN_BBIN, en_bbin);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
if (ret)
goto err;
ret = rtl2832_set_if(fe, priv->cfg.if_dvbt);
if (ret)
goto err;
}
/*
@ -590,18 +595,12 @@ static int rtl2832_set_frontend(struct dvb_frontend *fe)
/* If the frontend has get_if_frequency(), use it */
if (fe->ops.tuner_ops.get_if_frequency) {
u32 if_freq;
u64 pset_iffreq;
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
if (ret)
goto err;
pset_iffreq = if_freq % priv->cfg.xtal;
pset_iffreq *= 0x400000;
pset_iffreq = div_u64(pset_iffreq, priv->cfg.xtal);
pset_iffreq = pset_iffreq & 0x3fffff;
ret = rtl2832_wr_demod_reg(priv, DVBT_PSET_IFFREQ, pset_iffreq);
ret = rtl2832_set_if(fe, if_freq);
if (ret)
goto err;
}