From 19d273d63552ac99d171fd68018a41f496248513 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Sun, 14 Dec 2014 06:55:43 -0300 Subject: [PATCH] [media] rtl2832: implement DVBv5 CNR statistic DVBv5 CNR. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/rtl2832.c | 73 +++++++++++++++++++++- drivers/media/dvb-frontends/rtl2832_priv.h | 3 +- 2 files changed, 73 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index 5d7ea23f02f7..239472b4ce72 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -367,6 +367,7 @@ static int rtl2832_init(struct dvb_frontend *fe) { struct rtl2832_dev *dev = fe->demodulator_priv; struct i2c_client *client = dev->client; + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; const struct rtl2832_reg_value *init; int i, ret, len; /* initialization values for the demodulator registers */ @@ -472,11 +473,14 @@ static int rtl2832_init(struct dvb_frontend *fe) if (ret) goto err; #endif - + /* init stats here in order signal app which stats are supported */ + c->cnr.len = 1; + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + /* start statistics polling */ + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); dev->sleeping = false; return ret; - err: dev_dbg(&client->dev, "failed=%d\n", ret); return ret; @@ -489,6 +493,9 @@ static int rtl2832_sleep(struct dvb_frontend *fe) dev_dbg(&client->dev, "\n"); dev->sleeping = true; + /* stop statistics polling */ + cancel_delayed_work_sync(&dev->stat_work); + dev->fe_status = 0; return 0; } @@ -771,6 +778,7 @@ static int rtl2832_read_status(struct dvb_frontend *fe, fe_status_t *status) FE_HAS_VITERBI; }*/ + dev->fe_status = *status; return ret; err: dev_dbg(&client->dev, "failed=%d\n", ret); @@ -843,6 +851,66 @@ err: return ret; } +static void rtl2832_stat_work(struct work_struct *work) +{ + struct rtl2832_dev *dev = container_of(work, struct rtl2832_dev, stat_work.work); + struct i2c_client *client = dev->client; + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; + int ret, tmp; + u8 u8tmp, buf[2]; + u16 u16tmp; + + dev_dbg(&client->dev, "\n"); + + /* CNR */ + if (dev->fe_status & FE_HAS_VITERBI) { + unsigned hierarchy, constellation; + #define CONSTELLATION_NUM 3 + #define HIERARCHY_NUM 4 + static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { + {85387325, 85387325, 85387325, 85387325}, + {86676178, 86676178, 87167949, 87795660}, + {87659938, 87659938, 87885178, 88241743}, + }; + + ret = rtl2832_bulk_read(client, 0x33c, &u8tmp, 1); + if (ret) + goto err; + + constellation = (u8tmp >> 2) & 0x03; /* [3:2] */ + if (constellation > CONSTELLATION_NUM - 1) + goto err_schedule_delayed_work; + + hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */ + if (hierarchy > HIERARCHY_NUM - 1) + goto err_schedule_delayed_work; + + ret = rtl2832_bulk_read(client, 0x40c, buf, 2); + if (ret) + goto err; + + u16tmp = buf[0] << 8 | buf[1] << 0; + if (u16tmp) + tmp = (constant[constellation][hierarchy] - + intlog10(u16tmp)) / ((1 << 24) / 10000); + else + tmp = 0; + + dev_dbg(&client->dev, "cnr raw=%u\n", u16tmp); + + c->cnr.stat[0].scale = FE_SCALE_DECIBEL; + c->cnr.stat[0].svalue = tmp; + } else { + c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + +err_schedule_delayed_work: + schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000)); + return; +err: + dev_dbg(&client->dev, "failed=%d\n", ret); +} + /* * I2C gate/mux/repeater logic * We must use unlocked __i2c_transfer() here (through regmap) because of I2C @@ -1162,6 +1230,7 @@ static int rtl2832_probe(struct i2c_client *client, } dev->sleeping = true; INIT_DELAYED_WORK(&dev->i2c_gate_work, rtl2832_i2c_gate_work); + INIT_DELAYED_WORK(&dev->stat_work, rtl2832_stat_work); /* create regmap */ dev->regmap = regmap_init(&client->dev, ®map_bus, client, ®map_config); diff --git a/drivers/media/dvb-frontends/rtl2832_priv.h b/drivers/media/dvb-frontends/rtl2832_priv.h index eacd4e4d8ea3..3c44983b95a0 100644 --- a/drivers/media/dvb-frontends/rtl2832_priv.h +++ b/drivers/media/dvb-frontends/rtl2832_priv.h @@ -33,7 +33,8 @@ struct rtl2832_dev { struct i2c_adapter *i2c_adapter; struct i2c_adapter *i2c_adapter_tuner; struct dvb_frontend fe; - + struct delayed_work stat_work; + fe_status_t fe_status; bool i2c_gate_state; bool sleeping; struct delayed_work i2c_gate_work; -- 2.39.5