diff options
author | Antti Palosaari <crope@iki.fi> | 2016-08-08 23:03:32 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-09-22 10:40:01 -0300 |
commit | 90d5d2e3f047164748e67ae7cf4d5a7bb6a8d0b3 (patch) | |
tree | 11562ca462f92dfe71c0bcac9b63858a418d95cb /drivers | |
parent | 91171fb63e1b09fea18465248a748c48b0d33451 (diff) | |
download | linux-90d5d2e3f047164748e67ae7cf4d5a7bb6a8d0b3.tar.bz2 |
[media] cxd2820r: dvbv5 statistics for DVB-C
Implement dvbv5 statistics for DVB-C.
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_c.c | 104 |
1 files changed, 102 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_c.c b/drivers/media/dvb-frontends/cxd2820r_c.c index 957ec94c7243..7cdcd5535d06 100644 --- a/drivers/media/dvb-frontends/cxd2820r_c.c +++ b/drivers/media/dvb-frontends/cxd2820r_c.c @@ -260,11 +260,13 @@ int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks) int cxd2820r_read_status_c(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[2]; + unsigned int utmp; + u8 buf[3]; *status = 0; - ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf)); + ret = cxd2820r_rd_regs(priv, 0x10088, buf, 2); if (ret) goto error; @@ -281,6 +283,104 @@ int cxd2820r_read_status_c(struct dvb_frontend *fe, enum fe_status *status) dev_dbg(&priv->i2c->dev, "%s: lock=%02x %02x\n", __func__, buf[0], buf[1]); + /* Signal strength */ + if (*status & FE_HAS_SIGNAL) { + unsigned int strength; + + ret = cxd2820r_rd_regs(priv, 0x10049, buf, 2); + if (ret) + goto error; + + utmp = buf[0] << 8 | buf[1] << 0; + utmp = 511 - sign_extend32(utmp, 9); + /* Scale value to 0x0000-0xffff */ + strength = utmp << 6 | utmp >> 4; + + 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, const_a, const_b; + + ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]); + if (ret) + goto error; + + if (((buf[0] >> 0) & 0x03) % 2) { + const_a = 8750; + const_b = 650; + } else { + const_a = 9500; + const_b = 760; + } + + ret = cxd2820r_rd_reg(priv, 0x1004d, &buf[0]); + if (ret) + goto error; + + utmp = buf[0] << 0; + #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */ + if (utmp) + cnr = div_u64((u64)(intlog2(const_b) - intlog2(utmp)) + * const_a, CXD2820R_LOG2_E_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, 0x10076, 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, 0x10079, 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); |