Implement dvbv5 statistics for DVB-T2.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/media/dvb-frontends/cxd2820r_t2.c | 77 ++++++++++++++++++++++++++++++-
1 file changed, 76 insertions(+), 1 deletion(-)
diff --git a/drivers/media/dvb-frontends/cxd2820r_t2.c
b/drivers/media/dvb-frontends/cxd2820r_t2.c
index 14c9a26..e2875f2 100644
--- a/drivers/media/dvb-frontends/cxd2820r_t2.c
+++ b/drivers/media/dvb-frontends/cxd2820r_t2.c
@@ -286,8 +286,10 @@ error:
int cxd2820r_read_status_t2(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;
- u8 buf[1];
+ unsigned int utmp;
+ u8 buf[4];
*status = 0;
ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
@@ -306,6 +308,79 @@ int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum
fe_status *status)
dev_dbg(&priv->i2c->dev, "%s: lock=%02x\n", __func__, buf[0]);
+ /* Signal strength */
+ if (*status & FE_HAS_SIGNAL) {
+ unsigned int strength;
+
+ ret = cxd2820r_rd_regs(priv, 0x02026, 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, 0x02028, buf, 2);
+ if (ret)
+ goto error;
+
+ utmp = buf[0] << 8 | buf[1] << 0;
+ utmp = utmp & 0x0fff;
+ #define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
+ if (utmp)
+ cnr = div_u64((u64)(intlog10(utmp)
+ - CXD2820R_LOG10_8_24) * 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;
+
+ ret = cxd2820r_rd_regs(priv, 0x02039, buf, 4);
+ if (ret)
+ goto error;
+
+ if ((buf[0] >> 4) & 0x01) {
+ post_bit_error = buf[0] << 24 | buf[1] << 16 |
+ buf[2] << 8 | buf[3] << 0;
+ post_bit_error &= 0x0fffffff;
+ } else {
+ post_bit_error = 0;
+ }
+
+ 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);
--
http://palosaari.fi/
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