From 964b372740ad5f92c12220ebbb03b04a6cdf0435 Mon Sep 17 00:00:00 2001 From: Matthias Schwarzott Date: Sun, 5 Nov 2017 09:25:08 -0500 Subject: [PATCH] media: si2165: add DVBv5 BER statistics Add support for BER statistics. Configure a measurement period of 30000 packets. Signed-off-by: Matthias Schwarzott Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/si2165.c | 57 +++++++++++++++++++++++++++++-- drivers/media/dvb-frontends/si2165_priv.h | 11 ++++++ 2 files changed, 66 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c index 777b7d0..1cd2120 100644 --- a/drivers/media/dvb-frontends/si2165.c +++ b/drivers/media/dvb-frontends/si2165.c @@ -594,8 +594,9 @@ static int si2165_init(struct dvb_frontend *fe) if (ret < 0) goto error; - /* ber_pkt */ - ret = si2165_writereg16(state, REG_BER_PKT, 0x7530); + /* ber_pkt - default 65535 */ + ret = si2165_writereg16(state, REG_BER_PKT, + STATISTICS_PERIOD_PKT_COUNT); if (ret < 0) goto error; @@ -642,6 +643,10 @@ static int si2165_init(struct dvb_frontend *fe) c = &state->fe.dtv_property_cache; 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; return 0; error: @@ -738,6 +743,54 @@ static int si2165_read_status(struct dvb_frontend *fe, enum fe_status *status) } else c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + /* BER */ + if (*status & FE_HAS_VITERBI) { + if (c->post_bit_error.stat[0].scale == FE_SCALE_NOT_AVAILABLE) { + /* start new sampling period to get rid of old data*/ + ret = si2165_writereg8(state, REG_BER_RST, 0x01); + if (ret < 0) + return ret; + + /* set scale to enter read code on next call */ + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_error.stat[0].uvalue = 0; + c->post_bit_count.stat[0].uvalue = 0; + + } else { + ret = si2165_readreg8(state, REG_BER_AVAIL, &u8tmp); + if (ret < 0) + return ret; + + if (u8tmp & 1) { + u32 biterrcnt; + + ret = si2165_readreg24(state, REG_BER_BIT, + &biterrcnt); + if (ret < 0) + return ret; + + c->post_bit_error.stat[0].uvalue += + biterrcnt; + c->post_bit_count.stat[0].uvalue += + STATISTICS_PERIOD_BIT_COUNT; + + /* start new sampling period */ + ret = si2165_writereg8(state, + REG_BER_RST, 0x01); + if (ret < 0) + return ret; + + dev_dbg(&state->client->dev, + "post_bit_error=%u post_bit_count=%u\n", + biterrcnt, STATISTICS_PERIOD_BIT_COUNT); + } + } + } 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; } diff --git a/drivers/media/dvb-frontends/si2165_priv.h b/drivers/media/dvb-frontends/si2165_priv.h index 9d79e86..8c6fbfe 100644 --- a/drivers/media/dvb-frontends/si2165_priv.h +++ b/drivers/media/dvb-frontends/si2165_priv.h @@ -38,6 +38,9 @@ struct si2165_config { bool inversion; }; +#define STATISTICS_PERIOD_PKT_COUNT 30000u +#define STATISTICS_PERIOD_BIT_COUNT (STATISTICS_PERIOD_PKT_COUNT * 204 * 8) + #define REG_CHIP_MODE 0x0000 #define REG_CHIP_REVCODE 0x0023 #define REV_CHIP_TYPE 0x0118 @@ -95,8 +98,16 @@ struct si2165_config { #define REG_GP_REG0_MSB 0x0387 #define REG_CRC 0x037a #define REG_CHECK_SIGNAL 0x03a8 +#define REG_CBER_RST 0x0424 +#define REG_CBER_BIT 0x0428 +#define REG_CBER_ERR 0x0430 +#define REG_CBER_AVAIL 0x0434 #define REG_PS_LOCK 0x0440 +#define REG_UNCOR_CNT 0x0468 +#define REG_BER_RST 0x046c #define REG_BER_PKT 0x0470 +#define REG_BER_BIT 0x0478 +#define REG_BER_AVAIL 0x047c #define REG_FEC_LOCK 0x04e0 #define REG_TS_DATA_MODE 0x04e4 #define REG_TS_CLK_MODE 0x04e5 -- 2.7.4