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/linux/drivers/media/dvb-frontends/
H A Dor51211.c52 u32 snr; /* Result of last SNR calculation */ member
255 /* Calculate SNR estimation (scaled by 2^24)
257 8-VSB SNR equation from Oren datasheets
260 SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
262 We re-write the snr equation as:
263 SNR * 2^24 = 10*(c - 2*intlog10(MSE))
273 /* Negative SNR, which is possible, but realisticly the in calculate_snr()
281 static int or51211_read_snr(struct dvb_frontend* fe, u16* snr) in or51211_read_snr() argument
287 /* SNR after Equalizer */ in or51211_read_snr()
293 pr_warn("error writing snr reg\n"); in or51211_read_snr()
[all …]
H A Dlgdt330x.c57 u32 snr; /* Result of last SNR calculation */ member
452 * Calculate SNR estimation (scaled by 2^24)
454 * 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM
467 * SNR = 10 * log10( 688128 / MSEQAM)
469 * SNR = 10 * log10( 696320 / MSEQAM)
471 * We re-write the snr equation as:
472 * SNR * 2^24 = 10*(c - intlog10(MSE))
483 * Negative SNR, which is possible, but realisticly the in calculate_snr()
497 u32 c; /* per-modulation SNR calculation constant */ in lgdt3302_read_snr()
504 /* SNR for ranges from -15.61 to +41.58 */ in lgdt3302_read_snr()
[all …]
H A Dor51132.c52 u32 snr; /* Result of last SNR calculation */ member
422 /* Calculate SNR estimation (scaled by 2^24)
424 8-VSB SNR and QAM equations from Oren datasheets
427 SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K
433 SNR[dB] = 10 * log10(897152044.8282 / MSE^2 )
436 SNR[dB] = 10 * log10(907832426.314266 / MSE^2 )
438 We re-write the snr equation as:
439 SNR * 2^24 = 10*(c - 2*intlog10(MSE))
450 /* Negative SNR, which is possible, but realisticly the in calculate_snr()
458 static int or51132_read_snr(struct dvb_frontend* fe, u16* snr) in or51132_read_snr() argument
[all …]
H A Dgp8psk-fe.c34 u16 snr; member
61 st->snr = (buf[1]) << 8 | buf[0]; in gp8psk_fe_update_status()
101 static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr) in gp8psk_fe_read_snr() argument
105 /* snr is reported in dBu*256 */ in gp8psk_fe_read_snr()
106 *snr = st->snr; in gp8psk_fe_read_snr()
114 /* snr is reported in dBu*256 */ in gp8psk_fe_read_signal_strength()
115 /* snr / 38.4 ~= 100% strength */ in gp8psk_fe_read_signal_strength()
116 /* snr * 17 returns 100% strength as 65535 */ in gp8psk_fe_read_signal_strength()
117 if (st->snr > 0xf00) in gp8psk_fe_read_signal_strength()
120 *strength = (st->snr << 4) + st->snr; /* snr*17 */ in gp8psk_fe_read_signal_strength()
H A Dau8522_dig.c32 /* VSB SNR lookup table */
66 /* QAM64 SNR lookup table */
147 /* QAM256 SNR lookup table */
216 u16 *snr) in au8522_mse2snr_lookup() argument
223 *snr = tab[i].data; in au8522_mse2snr_lookup()
228 dprintk("%s() snr=%d\n", __func__, *snr); in au8522_mse2snr_lookup()
692 static int au8522_led_status(struct au8522_state *state, const u16 *snr) in au8522_led_status() argument
711 if (*snr >= strong) in au8522_led_status()
717 (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) in au8522_led_status()
718 /* snr didn't change enough to bother in au8522_led_status()
[all …]
H A Ds5h1409.c104 /* VSB SNR lookup table */
151 /* QAM64 SNR lookup table */
223 /* QAM256 SNR lookup table */
798 static int s5h1409_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1409_qam256_lookup_snr() argument
805 *snr = qam256_snr_tab[i].data; in s5h1409_qam256_lookup_snr()
813 static int s5h1409_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1409_qam64_lookup_snr() argument
820 *snr = qam64_snr_tab[i].data; in s5h1409_qam64_lookup_snr()
828 static int s5h1409_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1409_vsb_lookup_snr() argument
835 *snr = vsb_snr_tab[i].data; in s5h1409_vsb_lookup_snr()
840 dprintk("%s() snr=%d\n", __func__, *snr); in s5h1409_vsb_lookup_snr()
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H A Ds5h1411.c132 /* VSB SNR lookup table */
177 /* QAM64 SNR lookup table */
250 /* QAM256 SNR lookup table */
712 static int s5h1411_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1411_qam256_lookup_snr() argument
719 *snr = qam256_snr_tab[i].data; in s5h1411_qam256_lookup_snr()
727 static int s5h1411_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1411_qam64_lookup_snr() argument
734 *snr = qam64_snr_tab[i].data; in s5h1411_qam64_lookup_snr()
742 static int s5h1411_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v) in s5h1411_vsb_lookup_snr() argument
749 *snr = vsb_snr_tab[i].data; in s5h1411_vsb_lookup_snr()
754 dprintk("%s() snr=%d\n", __func__, *snr); in s5h1411_vsb_lookup_snr()
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H A Dlgdt3305.c51 u32 snr; member
975 /* Negative SNR, which is possible, but realisticly the in calculate_snr()
983 static int lgdt3305_read_snr(struct dvb_frontend *fe, u16 *snr) in lgdt3305_read_snr() argument
987 u32 c; /* per-modulation SNR calculation constant */ in lgdt3305_read_snr()
993 /* SNR for ranges from -13.11 to +44.08 */ in lgdt3305_read_snr()
1000 /* SNR for ranges from -16.12 to +44.08 */ in lgdt3305_read_snr()
1019 state->snr = calculate_snr(noise, c); in lgdt3305_read_snr()
1020 /* report SNR in dB * 10 */ in lgdt3305_read_snr()
1021 *snr = (state->snr / ((1 << 24) / 10)); in lgdt3305_read_snr()
1022 lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise, in lgdt3305_read_snr()
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H A Dlg2160.c1215 static int lg2160_read_snr(struct dvb_frontend *fe, u16 *snr) in lg2160_read_snr() argument
1221 *snr = 0; in lg2160_read_snr()
1232 *snr = 0; in lg2160_read_snr()
1235 *snr = ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 >> 4); in lg2160_read_snr()
1237 *snr = (snr2 | (snr1 << 8)); in lg2160_read_snr()
1243 static int lg2161_read_snr(struct dvb_frontend *fe, u16 *snr) in lg2161_read_snr() argument
1249 *snr = 0; in lg2161_read_snr()
1260 *snr = 0; in lg2161_read_snr()
1263 *snr = ((snr1 >> 4) * 100) + ((snr1 & 0x0f) * 10) + (snr2 & 0x0f); in lg2161_read_snr()
1274 * Calculate strength from SNR up to 35dB in lg216x_read_signal_strength()
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H A Das102_fe.c349 * - in AS102 SNR=MER
350 * - the SNR will be returned in linear terms, i.e. not in dB
351 * - the accuracy equals ±2dB for a SNR range from 4dB to 30dB
352 * - the accuracy is >2dB for SNR values outside this range
354 static int as102_fe_read_snr(struct dvb_frontend *fe, u16 *snr) in as102_fe_read_snr() argument
358 *snr = state->demod_stats.mer; in as102_fe_read_snr()
H A Dlgdt3306a.c71 u32 snr; member
1111 /* SNR is over 18dB and no ghosting */ in lgdt3306a_monitor_vsb()
1288 /* SNR of Frame sync */ in lgdt3306a_pre_monitoring()
1512 u32 snr; in lgdt3306a_vsb_lock_poll() local
1526 snr = lgdt3306a_calculate_snr_x100(state); in lgdt3306a_vsb_lock_poll()
1527 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr); in lgdt3306a_vsb_lock_poll()
1529 if ((snr >= 1500) && (packet_error < 0xff)) in lgdt3306a_vsb_lock_poll()
1542 u32 snr; in lgdt3306a_qam_lock_poll() local
1553 snr = lgdt3306a_calculate_snr_x100(state); in lgdt3306a_qam_lock_poll()
1554 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr); in lgdt3306a_qam_lock_poll()
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/linux/Documentation/devicetree/bindings/sound/
H A Dti,pcm6240.yaml39 digital converter (ADC) with 106-dB SNR.
41 ti,adc5120: 2-Channel, 768-kHz, Burr-Brown™ Audio ADC with 120-dB SNR.
44 digital converter (ADC) with 123-dB SNR.
49 ti,pcm1690: Automotive Catalog 113dB SNR 8-Channel Audio DAC with
52 ti,pcm3120: Automotive, stereo, 106-dB SNR, 768-kHz, low-power
56 with 106-dB SNR.
58 ti,pcm5120: Automotive, stereo, 120-dB SNR, 768-kHz, low-power
62 with 120-dB SNR.
64 ti,pcm6120: Automotive, stereo, 123-dB SNR, 768-kHz, low-power
68 with 123-dB SNR.
/linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/
H A DM0205.c30 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz) in nvbios_M0205Te() argument
45 *snr = nvbios_rd08(bios, data + 0x04); in nvbios_M0205Te()
59 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz, in nvbios_M0205Tp() argument
62 u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz); in nvbios_M0205Tp()
78 u8 snr, ssz; in nvbios_M0205Ee() local
79 u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz); in nvbios_M0205Ee()
81 data = data + *hdr + idx * (*len + (snr * ssz)); in nvbios_M0205Ee()
83 *cnt = snr; in nvbios_M0205Ee()
H A Dperf.c31 u8 *cnt, u8 *len, u8 *snr, u8 *ssz) in nvbios_perf_table() argument
45 *snr = nvbios_rd08(bios, perf + 4); in nvbios_perf_table()
52 *snr = nvbios_rd08(bios, perf + 4); in nvbios_perf_table()
68 *snr = 0; in nvbios_perf_table()
82 u8 snr, ssz; in nvbios_perf_entry() local
83 u32 perf = nvbios_perf_table(bios, ver, hdr, cnt, len, &snr, &ssz); in nvbios_perf_entry()
85 perf = perf + *hdr + (idx * (*len + (snr * ssz))); in nvbios_perf_entry()
87 *cnt = snr; in nvbios_perf_entry()
205 u8 ver, hdr, cnt, len, snr, ssz; in nvbios_perf_fan_parse() local
206 u32 perf = nvbios_perf_table(bios, &ver, &hdr, &cnt, &len, &snr, &ssz); in nvbios_perf_fan_parse()
H A Dboost.c30 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz) in nvbios_boostTe() argument
46 *snr = nvbios_rd08(bios, boost + 4); in nvbios_boostTe()
62 u8 snr, ssz; in nvbios_boostEe() local
63 u32 data = nvbios_boostTe(bios, ver, hdr, cnt, len, &snr, &ssz); in nvbios_boostEe()
65 data = data + *hdr + (idx * (*len + (snr * ssz))); in nvbios_boostEe()
67 *cnt = snr; in nvbios_boostEe()
H A DM0209.c30 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz) in nvbios_M0209Te() argument
45 *snr = 1; in nvbios_M0209Te()
61 u8 snr, ssz; in nvbios_M0209Ee() local
62 u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz); in nvbios_M0209Ee()
64 data = data + *hdr + idx * (*len + (snr * ssz)); in nvbios_M0209Ee()
66 *cnt = snr; in nvbios_M0209Ee()
H A Dtiming.c30 u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz) in nvbios_timingTe() argument
49 *snr = 0; in nvbios_timingTe()
56 *snr = nvbios_rd08(bios, timing + 4); in nvbios_timingTe()
72 u8 snr, ssz; in nvbios_timingEe() local
73 u32 timing = nvbios_timingTe(bios, ver, hdr, cnt, len, &snr, &ssz); in nvbios_timingEe()
75 timing += *hdr + idx * (*len + (snr * ssz)); in nvbios_timingEe()
77 *cnt = snr; in nvbios_timingEe()
/linux/include/linux/mfd/
H A Dsi476x-reports.h27 * @snrhint: SNR Detect High.
32 * @snrlint: SNR Detect Low.
50 * @snr_ready: SNR measurement in progress.
55 * snr < FM_VALID_SNR_THRESHOLD
60 * @snr: RF SNR Indicator(dB).
83 __s8 snr; member
/linux/drivers/media/usb/dvb-usb-v2/
H A Dmxl111sf-demod.c398 u16 *snr) in mxl111sf_demod_calc_snr() argument
403 *snr = 0; in mxl111sf_demod_calc_snr()
412 *snr = CALCULATE_SNR(val1 | ((val2 & 0x03) << 8)); in mxl111sf_demod_calc_snr()
417 static int mxl111sf_demod_read_snr(struct dvb_frontend *fe, u16 *snr) in mxl111sf_demod_read_snr() argument
421 int ret = mxl111sf_demod_calc_snr(state, snr); in mxl111sf_demod_read_snr()
425 *snr /= 10; /* 0.1 dB */ in mxl111sf_demod_read_snr()
472 u16 snr; in mxl111sf_demod_read_signal_strength() local
474 ret = mxl111sf_demod_calc_snr(state, &snr); in mxl111sf_demod_read_signal_strength()
483 *signal_strength = (snr >= 1300) ? in mxl111sf_demod_read_signal_strength()
484 min(65535, snr * 44) : snr * 38; in mxl111sf_demod_read_signal_strength()
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/linux/drivers/media/dvb-frontends/cxd2880/
H A Dcxd2880_tnrdmd_dvbt_mon.c434 u32 reg_value, int *snr) in dvbt_calc_snr() argument
436 if (!tnr_dmd || !snr) in dvbt_calc_snr()
445 *snr = intlog10(reg_value) - intlog10(5350 - reg_value); in dvbt_calc_snr()
446 *snr = (*snr + 839) / 1678 + 28500; in dvbt_calc_snr()
452 int *snr) in cxd2880_tnrdmd_dvbt_mon_snr() argument
457 if (!tnr_dmd || !snr) in cxd2880_tnrdmd_dvbt_mon_snr()
460 *snr = -1000 * 1000; in cxd2880_tnrdmd_dvbt_mon_snr()
476 ret = dvbt_calc_snr(tnr_dmd, reg_value, snr); in cxd2880_tnrdmd_dvbt_mon_snr()
482 cxd2880_tnrdmd_dvbt_mon_snr_diver(tnr_dmd, snr, &snr_main, in cxd2880_tnrdmd_dvbt_mon_snr()
490 *tnr_dmd, int *snr, in cxd2880_tnrdmd_dvbt_mon_snr_diver() argument
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/linux/Documentation/userspace-api/media/dvb/
H A Dfe-read-snr.rst22 ``int ioctl(int fd, FE_READ_SNR, int16_t *snr)``
30 ``snr``
31 The signal-to-noise ratio is stored into \*snr.
/linux/drivers/net/phy/
H A Ddp83td510.c44 /* Register values are converted to SNR(dB) as suggested by
46 * SNR(dB) = -10 * log10 (VAL/2^17) - 1.76 dB.
52 0x044c, /* 18dB =< SNR < 19dB */
53 0x0369, /* 19dB =< SNR < 20dB */
54 0x02b6, /* 20dB =< SNR < 21dB */
55 0x0227, /* 21dB =< SNR < 22dB */
56 0x01b6, /* 22dB =< SNR < 23dB */
57 0x015b, /* 23dB =< SNR < 24dB */
58 0x0000 /* 24dB =< SNR */
/linux/Documentation/admin-guide/media/
H A Dsi476x.rst121 0x02 snrhint 0 - received signal's SNR has not
123 1 - received signal's SNR has
130 0x07 snr_ready Indicates that SNR metrics is ready
140 0x16 snr Signed RF SNR in dB
/linux/drivers/net/wireless/marvell/mwifiex/
H A Dutil.c346 "TDLS discovery response %pM nf=%d, snr=%d\n", in mwifiex_parse_mgmt_packet()
347 addr2, rx_pd->nf, rx_pd->snr); in mwifiex_parse_mgmt_packet()
350 rx_pd->snr, in mwifiex_parse_mgmt_packet()
527 CAL_RSSI(rx_pd->snr, rx_pd->nf), skb->data, pkt_len, in mwifiex_process_mgmt_packet()
790 u8 rx_rate, s8 snr, s8 nflr) in mwifiex_hist_data_add() argument
796 mwifiex_hist_data_set(priv, rx_rate, snr, nflr); in mwifiex_hist_data_add()
800 void mwifiex_hist_data_set(struct mwifiex_private *priv, u8 rx_rate, s8 snr, in mwifiex_hist_data_set() argument
805 s8 rssi = snr - nflr; in mwifiex_hist_data_set()
809 atomic_inc(&phist_data->snr[snr + 128]); in mwifiex_hist_data_set()
824 atomic_set(&phist_data->snr[ix], 0); in mwifiex_hist_data_reset()
/linux/drivers/media/usb/dvb-usb/
H A Dvp702x-fe.c32 u8 snr; member
51 st->snr = buf[0]; in vp702x_fe_refresh_state()
117 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr) in vp702x_fe_read_snr() argument
123 _snr = (st->snr & 0x1f) * 0xff / 0x1f; in vp702x_fe_read_snr()
124 *snr = (_snr << 8) | _snr; in vp702x_fe_read_snr()

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