diff options
author | Antti Palosaari <crope@iki.fi> | 2016-08-08 20:13:45 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-09-22 10:39:06 -0300 |
commit | 2832fd3177d7d988348fc1bd8031daeea89396c9 (patch) | |
tree | 184bb0062ed2f941ab132daeb768e37dec3302ff /drivers | |
parent | fcd09f6592cc1d55dea1571297ad88b9024de80c (diff) | |
download | linux-2832fd3177d7d988348fc1bd8031daeea89396c9.tar.bz2 |
[media] cxd2820r: dvbv5 statistics for DVB-T
Implement dvbv5 statistics for DVB-T.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/dvb-frontends/cxd2820r_priv.h | 2 | ||||
-rw-r--r-- | drivers/media/dvb-frontends/cxd2820r_t.c | 88 |
2 files changed, 90 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_priv.h b/drivers/media/dvb-frontends/cxd2820r_priv.h index acfae17991e3..a97570b7fa1d 100644 --- a/drivers/media/dvb-frontends/cxd2820r_priv.h +++ b/drivers/media/dvb-frontends/cxd2820r_priv.h @@ -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; diff --git a/drivers/media/dvb-frontends/cxd2820r_t.c b/drivers/media/dvb-frontends/cxd2820r_t.c index 67cc33bc3c35..d402ab68368b 100644 --- a/drivers/media/dvb-frontends/cxd2820r_t.c +++ b/drivers/media/dvb-frontends/cxd2820r_t.c @@ -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); |