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[media] cxd2841er: BER and SNR reading for ISDB-T

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Added function to read BER for ISDB-T
Also SNR values fixed for ISDB-T

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Abylay Ospan 2016-07-19 12:22:03 -03:00 committed by Mauro Carvalho Chehab
parent d0fe85e95f
commit 0854df79f4
1 changed files with 45 additions and 3 deletions
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48
drivers/media/dvb-frontends/cxd2841er.c
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@ -206,6 +206,9 @@ static const struct cxd2841er_cnr_data s2_cn_data[] = {
(u32)(((iffreq)/48.0)*16777216.0 + 0.5) : \
(u32)(((iffreq)/41.0)*16777216.0 + 0.5))
static int cxd2841er_freeze_regs(struct cxd2841er_priv *priv);
static int cxd2841er_unfreeze_regs(struct cxd2841er_priv *priv);
static void cxd2841er_i2c_debug(struct cxd2841er_priv *priv,
u8 addr, u8 reg, u8 write,
const u8 *data, u32 len)
@ -1401,6 +1404,41 @@ static int cxd2841er_read_ber_c(struct cxd2841er_priv *priv,
return 0;
}
static int cxd2841er_read_ber_i(struct cxd2841er_priv *priv,
u32 *bit_error, u32 *bit_count)
{
u8 data[3];
u8 pktnum[2];
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;
}
cxd2841er_freeze_regs(priv);
cxd2841er_write_reg(priv, I2C_SLVT, 0x00, 0x60);
cxd2841er_read_regs(priv, I2C_SLVT, 0x5B, pktnum, sizeof(pktnum));
cxd2841er_read_regs(priv, I2C_SLVT, 0x16, data, sizeof(data));
if (!pktnum[0] && !pktnum[1]) {
dev_dbg(&priv->i2c->dev,
"%s(): no valid BER data\n", __func__);
cxd2841er_unfreeze_regs(priv);
return -EINVAL;
}
*bit_error = ((u32)(data[0] & 0x7F) << 16) |
((u32)data[1] << 8) | data[2];
*bit_count = ((((u32)pktnum[0] << 8) | pktnum[1]) * 204 * 8);
dev_dbg(&priv->i2c->dev, "%s(): bit_error=%u bit_count=%u\n",
__func__, *bit_error, *bit_count);
cxd2841er_unfreeze_regs(priv);
return 0;
}
static int cxd2841er_mon_read_ber_s(struct cxd2841er_priv *priv,
u32 *bit_error, u32 *bit_count)
{
@ -1798,9 +1836,7 @@ static int cxd2841er_read_snr_i(struct cxd2841er_priv *priv, u32 *snr)
cxd2841er_unfreeze_regs(priv);
return 0;
}
if (reg > 4996)
reg = 4996;
*snr = 100 * intlog10(reg) - 9031;
*snr = 10000 * (intlog10(reg) >> 24) - 9031;
cxd2841er_unfreeze_regs(priv);
return 0;
}
@ -1879,6 +1915,9 @@ static void cxd2841er_read_ber(struct dvb_frontend *fe)
case SYS_DVBC_ANNEX_C:
ret = cxd2841er_read_ber_c(priv, &bit_error, &bit_count);
break;
case SYS_ISDBT:
ret = cxd2841er_read_ber_i(priv, &bit_error, &bit_count);
break;
case SYS_DVBS:
ret = cxd2841er_mon_read_ber_s(priv, &bit_error, &bit_count);
break;
@ -1992,6 +2031,9 @@ static void cxd2841er_read_snr(struct dvb_frontend *fe)
return;
}
dev_dbg(&priv->i2c->dev, "%s(): snr=%d\n",
__func__, (int32_t)tmp);
if (!ret) {
p->cnr.stat[0].scale = FE_SCALE_DECIBEL;
p->cnr.stat[0].svalue = tmp;