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madwifi: fix noise level display and make the cca threshold configurable through sysctl
SVN-Revision: 18739
This commit is contained in:
Felix Fietkau
parent
04abaefe70
commit
b24884eeff
186
package/madwifi/patches/454-cca.patch
Normal file
186
package/madwifi/patches/454-cca.patch
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@ -0,0 +1,186 @@
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--- a/ath/if_ath.c
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+++ b/ath/if_ath.c
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@@ -383,6 +383,8 @@ static void ath_poll_disable(struct net_
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static void ath_poll_enable(struct net_device *dev);
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static void ath_fetch_idle_time(struct ath_softc *sc);
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static void ath_set_timing(struct ath_softc *sc);
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+static void ath_update_cca_thresh(struct ath_softc *sc);
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+static int ath_hw_read_nf(struct ath_softc *sc);
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/* calibrate every 30 secs in steady state but check every second at first. */
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static int ath_calinterval = ATH_SHORT_CALINTERVAL;
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@@ -2623,6 +2625,10 @@ ath_init(struct net_device *dev)
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goto done;
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}
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+ ath_hal_process_noisefloor(ah);
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+ ic->ic_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
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+ ath_update_cca_thresh(sc);
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+
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if (sc->sc_softled)
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ath_hal_gpioCfgOutput(ah, sc->sc_ledpin);
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@@ -3024,6 +3030,10 @@ ath_reset(struct net_device *dev)
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EPRINTF(sc, "Unable to reset hardware: '%s' (HAL status %u)\n",
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ath_get_hal_status_desc(status), status);
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+ ath_hal_process_noisefloor(ah);
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+ ic->ic_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
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+ ath_update_cca_thresh(sc);
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+
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ath_setintmit(sc);
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ath_update_txpow(sc); /* update tx power state */
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ath_radar_update(sc);
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@@ -9374,9 +9384,11 @@ ath_calibrate(unsigned long arg)
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sc->sc_curchan.channel);
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sc->sc_stats.ast_per_calfail++;
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}
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- ic->ic_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
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ath_hal_process_noisefloor(ah);
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+ ic->ic_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
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+ ath_update_cca_thresh(sc);
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+
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if (isIQdone == AH_TRUE) {
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/* Unless user has overridden calibration interval,
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* upgrade to less frequent calibration */
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@@ -9711,8 +9723,6 @@ ath_newstate(struct ieee80211vap *vap, e
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break;
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}
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- ath_hal_process_noisefloor(ah);
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- ic->ic_channoise = ath_hal_get_channel_noise(ah, &(sc->sc_curchan));
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/*
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* Reset rssi stats; maybe not the best place...
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*/
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@@ -10968,6 +10978,7 @@ enum {
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ATH_INTMIT,
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ATH_NOISE_IMMUNITY,
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ATH_OFDM_WEAK_DET,
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+ ATH_CCA_THRESH,
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ATH_CHANBW,
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ATH_OUTDOOR,
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ATH_DISTANCE,
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@@ -11110,6 +11121,66 @@ ath_sysctl_get_intmit(struct ath_softc *
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return 0;
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}
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+#define AR_PHY_CCA 0x9864
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+#define AR_PHY_MINCCA_PWR 0x0FF80000
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+#define AR_PHY_MINCCA_PWR_S 19
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+#define AR_PHY_CCA_THRESH62 0x0007F000
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+#define AR_PHY_CCA_THRESH62_S 12
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+
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+static int
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+ath_nf_from_cca(u32 phy_cca)
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+{
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+ int nf = (phy_cca >> 19) & 0x1ff;
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+ nf = -((nf ^ 0x1ff) + 1);
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+ return nf;
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+}
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+
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+static int
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+ath_hw_read_nf(struct ath_softc *sc)
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+{
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+ return ath_nf_from_cca(OS_REG_READ(sc->sc_ah, AR_PHY_CCA));
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+}
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+
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+static void
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+ath_update_cca_thresh(struct ath_softc *sc)
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+{
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+ struct ath_hal *ah = sc->sc_ah;
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+ int newthr = 0;
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+ u32 phy_cca;
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+ int nf;
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+
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+ phy_cca = OS_REG_READ(ah, AR_PHY_CCA);
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+ if (sc->sc_cca_thresh < 0) {
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+ newthr = sc->sc_cca_thresh - ath_nf_from_cca(phy_cca);
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+
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+ /* 0xf is a typical eeprom value for thresh62,
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+ * use it as minimum for signal based thresholds
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+ * to prevent complete connection drops */
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+ if (newthr < 0xf)
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+ newthr = 0xf;
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+ } else {
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+ newthr = sc->sc_cca_thresh;
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+ }
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+
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+ if ((newthr < 4) || (newthr >= 127))
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+ return;
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+
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+ phy_cca &= ~AR_PHY_CCA_THRESH62;
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+ phy_cca |= newthr << AR_PHY_CCA_THRESH62_S;
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+ OS_REG_WRITE(ah, AR_PHY_CCA, phy_cca);
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+}
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+
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+static int
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+ath_get_cca_thresh(struct ath_softc *sc)
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+{
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+ struct ath_hal *ah = sc->sc_ah;
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+ u32 phy_cca;
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+
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+ phy_cca = OS_REG_READ(ah, AR_PHY_CCA);
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+ return ath_nf_from_cca(phy_cca) +
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+ ((phy_cca & AR_PHY_CCA_THRESH62) >> AR_PHY_CCA_THRESH62_S);
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+}
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+
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static int
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ATH_SYSCTL_DECL(ath_sysctl_hwinfo, ctl, write, filp, buffer, lenp, ppos)
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{
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@@ -11356,6 +11427,10 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
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case ATH_OFDM_WEAK_DET:
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ret = ath_sysctl_set_intmit(sc, (long)ctl->extra2, val);
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break;
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+ case ATH_CCA_THRESH:
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+ sc->sc_cca_thresh = val;
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+ ath_update_cca_thresh(sc);
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+ break;
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default:
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ret = -EINVAL;
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break;
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@@ -11436,6 +11511,9 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
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case ATH_OFDM_WEAK_DET:
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ret = ath_sysctl_get_intmit(sc, (long)ctl->extra2, &val);
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break;
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+ case ATH_CCA_THRESH:
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+ val = ath_get_cca_thresh(sc);
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+ break;
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default:
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ret = -EINVAL;
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break;
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@@ -11667,6 +11745,12 @@ static const ctl_table ath_sysctl_templa
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.proc_handler = ath_sysctl_halparam,
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.extra2 = (void *)ATH_OFDM_WEAK_DET,
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},
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+ { .ctl_name = CTL_AUTO,
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+ .procname = "cca_thresh",
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+ .mode = 0644,
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+ .proc_handler = ath_sysctl_halparam,
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+ .extra2 = (void *)ATH_CCA_THRESH,
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+ },
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{ 0 }
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};
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--- a/ath/if_athvar.h
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+++ b/ath/if_athvar.h
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@@ -844,6 +844,7 @@ struct ath_softc {
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int sc_cal_interval; /* current calibration interval */
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struct timer_list sc_cal_ch; /* calibration timer */
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HAL_NODE_STATS sc_halstats; /* station-mode rssi stats */
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+ int sc_cca_thresh; /* configured CCA threshold */
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struct ctl_table_header *sc_sysctl_header;
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struct ctl_table *sc_sysctls;
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--- a/ath/ath_wprobe.c
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+++ b/ath/ath_wprobe.c
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@@ -133,8 +133,7 @@ ath_wprobe_sync(struct wprobe_iface *dev
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rx = READ_CLR(ah, AR5K_RXFC);
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tx = READ_CLR(ah, AR5K_TXFC);
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OS_REG_WRITE(ah, AR5K_MIBC, 0);
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- noise = ath_hal_get_channel_noise(sc->sc_ah, &(sc->sc_curchan));
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- ic->ic_channoise = noise;
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+ noise = ath_hw_read_nf(sc);
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WPROBE_FILL_BEGIN(val, ath_wprobe_globals);
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if (cc & 0xf0000000) {
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