mirror of https://github.com/hak5/openwrt.git
madwifi: add ap mode specific improvements to the calibration process. reported to produce a noticeable increase in rx/tx strength
SVN-Revision: 10416lede-17.01
Felix Fietkau
parent
fb5be81fe7
commit
f4012149b6
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@ -1,39 +0,0 @@
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The attached patch fixes the problem of very weak packets being send out
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after periodic calibration
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Signed-off-by: Karol Kowalik <karol.kowalik@cnri.dit.ie>
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Index: madwifi-dfs-r3252/ath/if_ath.c
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===================================================================
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--- madwifi-dfs-r3252.orig/ath/if_ath.c 2008-01-26 03:56:26.461576124 +0100
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+++ madwifi-dfs-r3252/ath/if_ath.c 2008-01-26 03:58:50.628969172 +0100
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@@ -8875,6 +8875,9 @@
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struct ieee80211com *ic = &sc->sc_ic;
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/* u_int32_t nchans; */
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HAL_BOOL isIQdone = AH_FALSE;
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+ u_int8_t papd_probe_power;
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+ u_int8_t papd_probe_power_max = 63;
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+ u_int16_t crnt_power_hdBm = sc->sc_curtxpow;
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sc->sc_stats.ast_per_cal++;
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DPRINTF(sc, ATH_DEBUG_CALIBRATE,
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@@ -8912,6 +8915,20 @@
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sc->sc_stats.ast_per_calfail++;
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}
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+ /*
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+ * After calibration is done we need to update AR5K_PHY_PAPD_PROBE
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+ * register with the probe_tx_power equal to current tx_power
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+ * otherwise a power drop may be observed
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+ */
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+ crnt_power_hdBm = crnt_power_hdBm <= ic->ic_txpowlimit ? crnt_power_hdBm : ic->ic_txpowlimit;
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+ papd_probe_power = papd_probe_power_max - (ic->ic_txpowlimit - crnt_power_hdBm);
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+#define AR5K_PHY_PAPD_PROBE_TX_NEXT 0x00008000
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+#define AR5K_PHY_PAPD_PROBE 0x9930
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+ OS_REG_WRITE(ah, AR5K_PHY_PAPD_PROBE,
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+ AR5K_PHY_PAPD_PROBE_TX_NEXT | (papd_probe_power << 9));
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+#undef AR5K_PHY_PAPD_PROBE_TX_NEXT
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+#undef AR5K_PHY_PAPD_PROBE
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+
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ath_hal_process_noisefloor(ah);
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if (isIQdone == AH_TRUE) {
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/* Unless user has overridden calibration interval,
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@ -0,0 +1,155 @@
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Index: madwifi-trunk-r3314/ath/if_ath.c
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===================================================================
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--- madwifi-trunk-r3314.orig/ath/if_ath.c 2008-02-06 20:27:16.005587752 +0100
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+++ madwifi-trunk-r3314/ath/if_ath.c 2008-02-06 22:06:51.778996341 +0100
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@@ -395,6 +395,7 @@
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static int maxvaps = -1;
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static int outdoor = -1;
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static int xchanmode = -1;
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+static int beacon_cal = 1;
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static const char *hal_status_desc[] = {
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"No error",
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@@ -420,6 +421,7 @@
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};
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,52))
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+MODULE_PARM(beacon_cal, "i");
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MODULE_PARM(countrycode, "i");
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MODULE_PARM(maxvaps, "i");
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MODULE_PARM(outdoor, "i");
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@@ -432,6 +434,7 @@
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MODULE_PARM(ratectl, "s");
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#else
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#include <linux/moduleparam.h>
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+module_param(beacon_cal, int, 0600);
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module_param(countrycode, int, 0600);
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module_param(maxvaps, int, 0600);
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module_param(outdoor, int, 0600);
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@@ -2594,7 +2597,8 @@
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}
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if (!sc->sc_invalid) {
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del_timer_sync(&sc->sc_dfs_cac_timer);
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- del_timer_sync(&sc->sc_cal_ch);
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+ if (!sc->sc_beacon_cal)
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+ del_timer_sync(&sc->sc_cal_ch);
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}
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ath_draintxq(sc);
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if (!sc->sc_invalid) {
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@@ -2611,6 +2615,20 @@
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return 0;
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}
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+static void ath_set_beacon_cal(struct ath_softc *sc, int val)
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+{
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+ if (sc->sc_beacon_cal == !!val)
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+ return;
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+
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+ if (val) {
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+ del_timer_sync(&sc->sc_cal_ch);
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+ } else {
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+ sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
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+ add_timer(&sc->sc_cal_ch);
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+ }
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+ sc->sc_beacon_cal = !!val && beacon_cal;
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+}
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+
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/*
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* Stop the device, grabbing the top-level lock to protect
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* against concurrent entry through ath_init (which can happen
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@@ -5141,6 +5159,8 @@
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"Invoking ath_hal_txstart with sc_bhalq: %d\n",
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sc->sc_bhalq);
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ath_hal_txstart(ah, sc->sc_bhalq);
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+ if (sc->sc_beacon_cal && (jiffies > sc->sc_lastcal + (ath_calinterval * HZ)))
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+ ath_calibrate((unsigned long) sc->sc_dev);
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sc->sc_stats.ast_be_xmit++; /* XXX per-VAP? */
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}
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@@ -5390,6 +5410,7 @@
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ath_hal_beacontimers(ah, &bs);
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sc->sc_imask |= HAL_INT_BMISS;
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ath_hal_intrset(ah, sc->sc_imask);
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+ ath_set_beacon_cal(sc, 0);
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} else {
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ath_hal_intrset(ah, 0);
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if (reset_tsf)
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@@ -5401,8 +5422,11 @@
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*/
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intval |= HAL_BEACON_ENA;
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sc->sc_imask |= HAL_INT_SWBA;
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+ ath_set_beacon_cal(sc, 1);
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ath_beaconq_config(sc);
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- }
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+ } else
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+ ath_set_beacon_cal(sc, 0);
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+
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#ifdef ATH_SUPERG_DYNTURBO
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ath_beacon_dturbo_config(vap, intval &
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~(HAL_BEACON_RESET_TSF | HAL_BEACON_ENA));
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@@ -8864,6 +8888,9 @@
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/* Enter DFS wait period */
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mod_timer(&sc->sc_dfs_cac_timer,
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jiffies + (sc->sc_dfs_cac_period * HZ));
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+
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+ /* This is a good time to start a calibration */
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+ ath_set_beacon_cal(sc, 1);
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}
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/*
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* re configure beacons when it is a turbo mode switch.
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@@ -8973,8 +9000,11 @@
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sc->sc_curchan.channel, sc->sc_curchan.channelFlags,
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isIQdone ? "done" : "not done");
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- sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
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- add_timer(&sc->sc_cal_ch);
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+ sc->sc_lastcal = jiffies;
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+ if (!sc->sc_beacon_cal) {
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+ sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
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+ add_timer(&sc->sc_cal_ch);
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+ }
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}
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static void
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@@ -9081,7 +9111,8 @@
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ieee80211_state_name[vap->iv_state],
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ieee80211_state_name[nstate]);
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- del_timer(&sc->sc_cal_ch); /* periodic calibration timer */
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+ if (!sc->sc_beacon_cal)
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+ del_timer(&sc->sc_cal_ch); /* periodic calibration timer */
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ath_hal_setledstate(ah, leds[nstate]); /* set LED */
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netif_stop_queue(dev); /* before we do anything else */
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@@ -9306,7 +9337,8 @@
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"VAP -> DFSWAIT_PENDING \n");
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/* start calibration timer with a really small value
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* 1/10 sec */
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- mod_timer(&sc->sc_cal_ch, jiffies + (HZ/10));
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+ if (!sc->sc_beacon_cal)
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+ mod_timer(&sc->sc_cal_ch, jiffies + (HZ/10));
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/* wake the receiver */
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netif_wake_queue(dev);
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/* don't do the other usual stuff... */
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@@ -9349,7 +9381,7 @@
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error = avp->av_newstate(vap, nstate, arg);
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/* Finally, start any timers. */
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- if (nstate == IEEE80211_S_RUN) {
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+ if (nstate == IEEE80211_S_RUN && !sc->sc_beacon_cal) {
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/* start periodic recalibration timer */
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mod_timer(&sc->sc_cal_ch, jiffies + (ath_calinterval * HZ));
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}
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Index: madwifi-trunk-r3314/ath/if_athvar.h
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===================================================================
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--- madwifi-trunk-r3314.orig/ath/if_athvar.h 2008-02-06 20:27:08.969186784 +0100
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+++ madwifi-trunk-r3314/ath/if_athvar.h 2008-02-06 20:27:24.670081522 +0100
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@@ -778,6 +778,8 @@
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struct ieee80211vap **sc_bslot; /* beacon xmit slots */
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int sc_bnext; /* next slot for beacon xmit */
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+ int sc_beacon_cal; /* use beacon timer for calibration */
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+ u_int64_t sc_lastcal; /* last time the calibration was performed */
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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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