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92 lines
2.6 KiB
92 lines
2.6 KiB
From 0d3b277d19137c4a0fdadfd1381f1c66515d1b0c Mon Sep 17 00:00:00 2001
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From: Athanasios Oikonomou <athoik@gmail.com>
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Date: Mon, 8 Feb 2016 22:14:31 +0200
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Subject: [PATCH] STV: Add SNR/Signal report parameters
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diff --git a/drivers/media/dvb-frontends/stv090x.c b/drivers/media/dvb-frontends/stv090x.c
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index 264c4b8..12fd3d0 100644
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--- a/drivers/media/dvb-frontends/stv090x.c
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+++ b/drivers/media/dvb-frontends/stv090x.c
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@@ -41,6 +41,18 @@
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static unsigned int verbose;
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module_param(verbose, int, 0644);
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+/* define how SNR measurement is reported */
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+static int esno;
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+module_param(esno, int, 0644);
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+MODULE_PARM_DESC(esno, "SNR is reported in 0:Percentage, "\
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+ "1:(EsNo dB)*10 (default:0)");
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+
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+/* define how signal measurement is reported */
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+static int dbm;
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+module_param(dbm, int, 0644);
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+MODULE_PARM_DESC(dbm, "Signal is reported in 0:Percentage, "\
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+ "1:-1*dBm (default:0)");
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+
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/* internal params node */
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struct stv090x_dev {
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/* pointer for internal params, one for each pair of demods */
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@@ -3693,7 +3705,10 @@ static int stv090x_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
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str = 0;
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else if (agc < stv090x_rf_tab[ARRAY_SIZE(stv090x_rf_tab) - 1].read)
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str = -100;
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- *strength = (str + 100) * 0xFFFF / 100;
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+ if (dbm)
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+ *strength = -str;
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+ else
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+ *strength = (str + 100) * 0xFFFF / 100;
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return 0;
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}
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@@ -3704,8 +3719,7 @@ static int stv090x_read_cnr(struct dvb_frontend *fe, u16 *cnr)
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u32 reg_0, reg_1, reg, i;
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s32 val_0, val_1, val = 0;
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u8 lock_f;
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- s32 div;
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- u32 last;
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+ s32 snr;
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switch (state->delsys) {
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case STV090x_DVBS2:
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@@ -3722,10 +3736,14 @@ static int stv090x_read_cnr(struct dvb_frontend *fe, u16 *cnr)
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msleep(1);
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}
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val /= 16;
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- last = ARRAY_SIZE(stv090x_s2cn_tab) - 1;
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- div = stv090x_s2cn_tab[0].read -
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- stv090x_s2cn_tab[last].read;
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- *cnr = 0xFFFF - ((val * 0xFFFF) / div);
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+ snr = stv090x_table_lookup(stv090x_s2cn_tab,
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+ ARRAY_SIZE(stv090x_s2cn_tab) - 1, val);
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+ if (snr < 0) snr = 0;
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+ if (snr > 200) snr = 200;
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+ if (esno)
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+ *cnr = snr;
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+ else
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+ *cnr = snr * 0xFFFF / 200;
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}
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break;
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@@ -3744,10 +3762,14 @@ static int stv090x_read_cnr(struct dvb_frontend *fe, u16 *cnr)
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msleep(1);
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}
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val /= 16;
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- last = ARRAY_SIZE(stv090x_s1cn_tab) - 1;
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- div = stv090x_s1cn_tab[0].read -
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- stv090x_s1cn_tab[last].read;
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- *cnr = 0xFFFF - ((val * 0xFFFF) / div);
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+ snr = stv090x_table_lookup(stv090x_s1cn_tab,
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+ ARRAY_SIZE(stv090x_s1cn_tab) - 1, val);
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+ if (snr < 0) snr = 0;
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+ if (snr > 200) snr = 200;
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+ if (esno)
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+ *cnr = snr;
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+ else
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+ *cnr = snr * 0xFFFF / 200;
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}
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break;
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default:
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--
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2.1.4
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