diff options
| -rw-r--r-- | drivers/media/dvb-frontends/af9033.c | 54 |
1 files changed, 52 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/af9033.c b/drivers/media/dvb-frontends/af9033.c index b9a0b009aeda..576e9b5f4bbf 100644 --- a/drivers/media/dvb-frontends/af9033.c +++ b/drivers/media/dvb-frontends/af9033.c @@ -1054,11 +1054,12 @@ static void af9033_stat_work(struct work_struct *work) { struct af9033_dev *dev = container_of(work, struct af9033_dev, stat_work.work); struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; - int ret, tmp; - u8 u8tmp; + int ret, tmp, i, len; + u8 u8tmp, buf[3]; dev_dbg(&dev->client->dev, "\n"); + /* signal strength */ if (dev->fe_status & FE_HAS_SIGNAL) { if (dev->is_af9035) { ret = af9033_rd_reg(dev, 0x80004a, &u8tmp); @@ -1078,6 +1079,55 @@ static void af9033_stat_work(struct work_struct *work) c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; } + /* CNR */ + if (dev->fe_status & FE_HAS_VITERBI) { + u32 snr_val; + const struct val_snr *snr_lut; + + /* read value */ + ret = af9033_rd_regs(dev, 0x80002c, buf, 3); + if (ret) + goto err; + + snr_val = (buf[2] << 16) | (buf[1] << 8) | (buf[0] << 0); + + /* read current modulation */ + ret = af9033_rd_reg(dev, 0x80f903, &u8tmp); + if (ret) + goto err; + + switch ((u8tmp >> 0) & 3) { + case 0: + len = ARRAY_SIZE(qpsk_snr_lut); + snr_lut = qpsk_snr_lut; + break; + case 1: + len = ARRAY_SIZE(qam16_snr_lut); + snr_lut = qam16_snr_lut; + break; + case 2: + len = ARRAY_SIZE(qam64_snr_lut); + snr_lut = qam64_snr_lut; + break; + default: + goto err_schedule_delayed_work; + } + + for (i = 0; i < len; i++) { + tmp = snr_lut[i].snr * 1000; + if (snr_val < snr_lut[i].val) + break; + } + + c->cnr.len = 1; + c->cnr.stat[0].scale = FE_SCALE_DECIBEL; + c->cnr.stat[0].svalue = tmp; + } else { + c->cnr.len = 1; + 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: |