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[media] cxd2820r: dvbv5 statistics for DVB-T

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Implement dvbv5 statistics for DVB-T.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Antti Palosaari 2016-08-08 20:13:45 -03:00 committed by Mauro Carvalho Chehab
parent fcd09f6592
commit 2832fd3177
2 changed files with 90 additions and 0 deletions
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2
drivers/media/dvb-frontends/cxd2820r_priv.h
View file

@ -27,6 +27,7 @@
#include "dvb_math.h"
#include "cxd2820r.h"
#include <linux/gpio.h>
#include <linux/math64.h>
struct reg_val_mask {
u32 reg;
@ -40,6 +41,7 @@ struct cxd2820r_priv {
struct i2c_adapter *i2c;
struct dvb_frontend fe;
struct cxd2820r_config cfg;
u64 post_bit_error;
bool ber_running;

88
drivers/media/dvb-frontends/cxd2820r_t.c
View file

@ -351,7 +351,9 @@ int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
int cxd2820r_read_status_t(struct dvb_frontend *fe, enum fe_status *status)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
unsigned int utmp;
u8 buf[4];
*status = 0;
@ -388,6 +390,92 @@ int cxd2820r_read_status_t(struct dvb_frontend *fe, enum fe_status *status)
dev_dbg(&priv->i2c->dev, "%s: lock=%*ph\n", __func__, 4, buf);
/* Signal strength */
if (*status & FE_HAS_SIGNAL) {
unsigned int strength;
ret = cxd2820r_rd_regs(priv, 0x00026, buf, 2);
if (ret)
goto error;
utmp = buf[0] << 8 | buf[1] << 0;
utmp = ~utmp & 0x0fff;
/* Scale value to 0x0000-0xffff */
strength = utmp << 4 | utmp >> 8;
c->strength.len = 1;
c->strength.stat[0].scale = FE_SCALE_RELATIVE;
c->strength.stat[0].uvalue = strength;
} else {
c->strength.len = 1;
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* CNR */
if (*status & FE_HAS_VITERBI) {
unsigned int cnr;
ret = cxd2820r_rd_regs(priv, 0x0002c, buf, 2);
if (ret)
goto error;
utmp = buf[0] << 8 | buf[1] << 0;
if (utmp)
cnr = div_u64((u64)(intlog10(utmp)
- intlog10(32000 - utmp) + 55532585)
* 10000, (1 << 24));
else
cnr = 0;
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = cnr;
} else {
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* BER */
if (*status & FE_HAS_SYNC) {
unsigned int post_bit_error;
bool start_ber;
if (priv->ber_running) {
ret = cxd2820r_rd_regs(priv, 0x00076, buf, 3);
if (ret)
goto error;
if ((buf[2] >> 7) & 0x01) {
post_bit_error = buf[2] << 16 | buf[1] << 8 |
buf[0] << 0;
post_bit_error &= 0x0fffff;
start_ber = true;
} else {
post_bit_error = 0;
start_ber = false;
}
} else {
post_bit_error = 0;
start_ber = true;
}
if (start_ber) {
ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
if (ret)
goto error;
priv->ber_running = true;
}
priv->post_bit_error += post_bit_error;
c->post_bit_error.len = 1;
c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
} else {
c->post_bit_error.len = 1;
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
return ret;
error:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);