From 8393c00369f1fe68182295b7adca80a73646fdd3 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Thu, 8 Dec 2016 22:19:19 -0200 Subject: [media] si2168: implement ber statistics Implement DVBv5 BER. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/si2168.c | 46 +++++++++++++++++++++++++++++-- drivers/media/dvb-frontends/si2168_priv.h | 1 + 2 files changed, 45 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c index 20b4a659e2e4..5fbb6c12b766 100644 --- a/drivers/media/dvb-frontends/si2168.c +++ b/drivers/media/dvb-frontends/si2168.c @@ -85,7 +85,8 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status) struct i2c_client *client = fe->demodulator_priv; struct si2168_dev *dev = i2c_get_clientdata(client); struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; + int ret, i; + unsigned int utmp, utmp1, utmp2; struct si2168_cmd cmd; *status = 0; @@ -144,6 +145,39 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status) dev_dbg(&client->dev, "status=%02x args=%*ph\n", *status, cmd.rlen, cmd.args); + /* BER */ + if (*status & FE_HAS_VITERBI) { + memcpy(cmd.args, "\x82\x00", 2); + cmd.wlen = 2; + cmd.rlen = 3; + ret = si2168_cmd_execute(client, &cmd); + if (ret) + goto err; + + /* + * Firmware returns [0, 255] mantissa and [0, 8] exponent. + * Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8 + */ + utmp = clamp(8 - cmd.args[1], 0, 8); + for (i = 0, utmp1 = 1; i < utmp; i++) + utmp1 = utmp1 * 10; + + utmp1 = cmd.args[2] * utmp1; + utmp2 = 100000000; /* 10^8 */ + + dev_dbg(&client->dev, + "post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n", + utmp1, utmp2, cmd.args[2], cmd.args[1]); + + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_error.stat[0].uvalue += utmp1; + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_count.stat[0].uvalue += utmp2; + } else { + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + return 0; err: dev_dbg(&client->dev, "failed=%d\n", ret); @@ -355,6 +389,7 @@ static int si2168_init(struct dvb_frontend *fe) { struct i2c_client *client = fe->demodulator_priv; struct si2168_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &fe->dtv_property_cache; int ret, len, remaining; const struct firmware *fw; struct si2168_cmd cmd; @@ -493,10 +528,17 @@ static int si2168_init(struct dvb_frontend *fe) dev->warm = true; warm: + /* Init stats here to indicate which stats are supported */ + c->cnr.len = 1; + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_error.len = 1; + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_count.len = 1; + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + dev->active = true; return 0; - err_release_firmware: release_firmware(fw); err: diff --git a/drivers/media/dvb-frontends/si2168_priv.h b/drivers/media/dvb-frontends/si2168_priv.h index 7843ccb448a0..2fecac6231ff 100644 --- a/drivers/media/dvb-frontends/si2168_priv.h +++ b/drivers/media/dvb-frontends/si2168_priv.h @@ -21,6 +21,7 @@ #include "dvb_frontend.h" #include #include +#include #define SI2168_A20_FIRMWARE "dvb-demod-si2168-a20-01.fw" #define SI2168_A30_FIRMWARE "dvb-demod-si2168-a30-01.fw" -- cgit v1.2.3