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[media] Add carrier offset calculation for DVB-T

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Adding cxd2841er_get_carrier_offset_t to calculate DVB-T offset
for Sony demodulators CXD2841ER and CXD2854ER

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Abylay Ospan 2016-04-02 23:31:50 -03:00 committed by Mauro Carvalho Chehab
parent 1a76e1f75f
commit c5ea46dae9
1 changed files with 32 additions and 0 deletions
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32
drivers/media/dvb-frontends/cxd2841er.c
View file

@ -1095,6 +1095,30 @@ static int cxd2841er_get_carrier_offset_s_s2(struct cxd2841er_priv *priv,
return 0;
}
static int cxd2841er_get_carrier_offset_t(struct cxd2841er_priv *priv,
u32 bandwidth, int *offset)
{
u8 data[4];
dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
if (priv->state != STATE_ACTIVE_TC) {
dev_dbg(&priv->i2c->dev, "%s(): invalid state %d\n",
__func__, priv->state);
return -EINVAL;
}
if (priv->system != SYS_DVBT) {
dev_dbg(&priv->i2c->dev, "%s(): invalid delivery system %d\n",
__func__, priv->system);
return -EINVAL;
}
cxd2841er_write_reg(priv, I2C_SLVT, 0x00, 0x10);
cxd2841er_read_regs(priv, I2C_SLVT, 0x4c, data, sizeof(data));
*offset = -1 * sign_extend32(
((u32)(data[0] & 0x1F) << 24) | ((u32)data[1] << 16) |
((u32)data[2] << 8) | (u32)data[3], 29);
return 0;
}
static int cxd2841er_get_carrier_offset_t2(struct cxd2841er_priv *priv,
u32 bandwidth, int *offset)
{
@ -1560,6 +1584,10 @@ static u16 cxd2841er_read_agc_gain_t_t2(struct cxd2841er_priv *priv,
cxd2841er_write_reg(
priv, I2C_SLVT, 0x00, (delsys == SYS_DVBT ? 0x10 : 0x20));
cxd2841er_read_regs(priv, I2C_SLVT, 0x26, data, 2);
dev_dbg(&priv->i2c->dev,
"%s(): AGC value=%u\n",
__func__, (((u16)data[0] & 0x0F) << 8) |
(u16)(data[1] & 0xFF));
return ((((u16)data[0] & 0x0F) << 8) | (u16)(data[1] & 0xFF)) << 4;
}
@ -2912,6 +2940,10 @@ static int cxd2841er_tune_tc(struct dvb_frontend *fe,
if (*status & FE_HAS_LOCK) {
switch (priv->system) {
case SYS_DVBT:
ret = cxd2841er_get_carrier_offset_t(
priv, p->bandwidth_hz,
&carrier_offset);
break;
case SYS_DVBT2:
ret = cxd2841er_get_carrier_offset_t2(
priv, p->bandwidth_hz,