From 47b4dbfff1f31686ac74aae7c69dec23b36005d9 Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Tue, 9 Dec 2014 06:14:36 -0300 Subject: [PATCH] [media] rtl2830: implement DVBv5 CNR statistic DVBv5 CNR. Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/rtl2830.c | 74 ++++++++++++++++++++++ drivers/media/dvb-frontends/rtl2830_priv.h | 3 + 2 files changed, 77 insertions(+) diff --git a/drivers/media/dvb-frontends/rtl2830.c b/drivers/media/dvb-frontends/rtl2830.c index 8025b19ac36d..c484634a9fc9 100644 --- a/drivers/media/dvb-frontends/rtl2830.c +++ b/drivers/media/dvb-frontends/rtl2830.c @@ -177,6 +177,7 @@ static int rtl2830_init(struct dvb_frontend *fe) { struct i2c_client *client = fe->demodulator_priv; struct rtl2830_dev *dev = i2c_get_clientdata(client); + struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; int ret, i; struct rtl2830_reg_val_mask tab[] = { {0x00d, 0x01, 0x03}, @@ -244,6 +245,12 @@ static int rtl2830_init(struct dvb_frontend *fe) if (ret) goto err; + /* 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; @@ -258,6 +265,9 @@ static int rtl2830_sleep(struct dvb_frontend *fe) struct rtl2830_dev *dev = i2c_get_clientdata(client); dev->sleeping = true; + /* stop statistics polling */ + cancel_delayed_work_sync(&dev->stat_work); + dev->fe_status = 0; return 0; } @@ -518,6 +528,8 @@ static int rtl2830_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); @@ -670,6 +682,66 @@ static struct dvb_frontend_ops rtl2830_ops = { .read_signal_strength = rtl2830_read_signal_strength, }; +static void rtl2830_stat_work(struct work_struct *work) +{ + struct rtl2830_dev *dev = container_of(work, struct rtl2830_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] = { + {70705899, 70705899, 70705899, 70705899}, + {82433173, 82433173, 87483115, 94445660}, + {92888734, 92888734, 95487525, 99770748}, + }; + + ret = rtl2830_rd_reg(client, 0x33c, &u8tmp); + 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 = rtl2830_rd_regs(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/repeater logic * We must use unlocked i2c_transfer() here because I2C lock is already taken @@ -765,8 +837,10 @@ static int rtl2830_probe(struct i2c_client *client, /* setup the state */ i2c_set_clientdata(client, dev); + dev->client = client; dev->pdata = client->dev.platform_data; dev->sleeping = true; + INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work); /* check if the demod is there */ ret = rtl2830_rd_reg(client, 0x000, &u8tmp); diff --git a/drivers/media/dvb-frontends/rtl2830_priv.h b/drivers/media/dvb-frontends/rtl2830_priv.h index 5f9973a07fcd..7cf316d0d149 100644 --- a/drivers/media/dvb-frontends/rtl2830_priv.h +++ b/drivers/media/dvb-frontends/rtl2830_priv.h @@ -25,10 +25,13 @@ struct rtl2830_dev { struct rtl2830_platform_data *pdata; + struct i2c_client *client; struct i2c_adapter *adapter; struct dvb_frontend fe; bool sleeping; u8 page; /* active register page */ + struct delayed_work stat_work; + fe_status_t fe_status; }; struct rtl2830_reg_val_mask { -- 2.20.1