madwifi: add ap mode specific improvements to the calibration process. reported to produce a noticeable increase in rx/tx strength

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10416 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 155 insertions, 0 deletions

diff --git a/package/madwifi/patches/330-beaconcal.patch b/package/madwifi/patches/330-beaconcal.patch
new file mode 100644
index 0000000000..7dc7b937be
--- /dev/null
+++ b/package/madwifi/patches/330-beaconcal.patch
@@ -0,0 +1,155 @@
+Index: madwifi-trunk-r3314/ath/if_ath.c
+===================================================================
+--- madwifi-trunk-r3314.orig/ath/if_ath.c	2008-02-06 20:27:16.005587752 +0100
++++ madwifi-trunk-r3314/ath/if_ath.c	2008-02-06 22:06:51.778996341 +0100
+@@ -395,6 +395,7 @@
+ static int maxvaps = -1;
+ static int outdoor = -1;
+ static int xchanmode = -1;
++static int beacon_cal = 1;
+ 
+ static const char *hal_status_desc[] = {
+ 	"No error",
+@@ -420,6 +421,7 @@
+ };
+ 
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,52))
++MODULE_PARM(beacon_cal, "i");
+ MODULE_PARM(countrycode, "i");
+ MODULE_PARM(maxvaps, "i");
+ MODULE_PARM(outdoor, "i");
+@@ -432,6 +434,7 @@
+ MODULE_PARM(ratectl, "s");
+ #else
+ #include <linux/moduleparam.h>
++module_param(beacon_cal, int, 0600);
+ module_param(countrycode, int, 0600);
+ module_param(maxvaps, int, 0600);
+ module_param(outdoor, int, 0600);
+@@ -2594,7 +2597,8 @@
+ 		}
+ 		if (!sc->sc_invalid) {
+ 			del_timer_sync(&sc->sc_dfs_cac_timer);
+-			del_timer_sync(&sc->sc_cal_ch);
++			if (!sc->sc_beacon_cal)
++				del_timer_sync(&sc->sc_cal_ch);
+ 		}
+ 		ath_draintxq(sc);
+ 		if (!sc->sc_invalid) {
+@@ -2611,6 +2615,20 @@
+ 	return 0;
+ }
+ 
++static void ath_set_beacon_cal(struct ath_softc *sc, int val)
++{
++	if (sc->sc_beacon_cal == !!val)
++		return;
++
++	if (val) {
++		del_timer_sync(&sc->sc_cal_ch);
++	} else {
++		sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
++		add_timer(&sc->sc_cal_ch);
++	}
++	sc->sc_beacon_cal = !!val && beacon_cal;
++}
++
+ /*
+  * Stop the device, grabbing the top-level lock to protect
+  * against concurrent entry through ath_init (which can happen
+@@ -5141,6 +5159,8 @@
+ 			"Invoking ath_hal_txstart with sc_bhalq: %d\n",
+ 			sc->sc_bhalq);
+ 		ath_hal_txstart(ah, sc->sc_bhalq);
++		if (sc->sc_beacon_cal && (jiffies > sc->sc_lastcal + (ath_calinterval * HZ)))
++			ath_calibrate((unsigned long) sc->sc_dev);
+ 
+ 		sc->sc_stats.ast_be_xmit++;		/* XXX per-VAP? */
+ 	}
+@@ -5390,6 +5410,7 @@
+ 		ath_hal_beacontimers(ah, &bs);
+ 		sc->sc_imask |= HAL_INT_BMISS;
+ 		ath_hal_intrset(ah, sc->sc_imask);
++		ath_set_beacon_cal(sc, 0);
+ 	} else {
+ 		ath_hal_intrset(ah, 0);
+ 		if (reset_tsf)
+@@ -5401,8 +5422,11 @@
+ 			 */
+ 			intval |= HAL_BEACON_ENA;
+ 			sc->sc_imask |= HAL_INT_SWBA;
++			ath_set_beacon_cal(sc, 1);
+ 			ath_beaconq_config(sc);
+-		}
++		} else
++			ath_set_beacon_cal(sc, 0);
++
+ #ifdef ATH_SUPERG_DYNTURBO
+ 		ath_beacon_dturbo_config(vap, intval &
+ 				~(HAL_BEACON_RESET_TSF | HAL_BEACON_ENA));
+@@ -8864,6 +8888,9 @@
+ 			/* Enter DFS wait period */
+ 			mod_timer(&sc->sc_dfs_cac_timer,
+ 				jiffies + (sc->sc_dfs_cac_period * HZ));
++
++			/* This is a good time to start a calibration */
++			ath_set_beacon_cal(sc, 1);
+ 		}
+ 		/*
+ 		 * re configure beacons when it is a turbo mode switch.
+@@ -8973,8 +9000,11 @@
+ 		sc->sc_curchan.channel, sc->sc_curchan.channelFlags,
+ 		isIQdone ? "done" : "not done");
+ 
+-	sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
+-	add_timer(&sc->sc_cal_ch);
++	sc->sc_lastcal = jiffies;
++	if (!sc->sc_beacon_cal) {
++		sc->sc_cal_ch.expires = jiffies + (ath_calinterval * HZ);
++		add_timer(&sc->sc_cal_ch);
++	}
+ }
+ 
+ static void
+@@ -9081,7 +9111,8 @@
+ 		ieee80211_state_name[vap->iv_state],
+ 		ieee80211_state_name[nstate]);
+ 
+-	del_timer(&sc->sc_cal_ch);		/* periodic calibration timer */
++	if (!sc->sc_beacon_cal)
++		del_timer(&sc->sc_cal_ch);		/* periodic calibration timer */
+ 
+ 	ath_hal_setledstate(ah, leds[nstate]);	/* set LED */
+ 	netif_stop_queue(dev);			/* before we do anything else */
+@@ -9306,7 +9337,8 @@
+ 				"VAP -> DFSWAIT_PENDING \n");
+ 			/* start calibration timer with a really small value 
+ 			 * 1/10 sec */
+-			mod_timer(&sc->sc_cal_ch, jiffies + (HZ/10));
++			if (!sc->sc_beacon_cal)
++				mod_timer(&sc->sc_cal_ch, jiffies + (HZ/10));
+ 			/* wake the receiver */
+ 			netif_wake_queue(dev);
+ 			/* don't do the other usual stuff... */
+@@ -9349,7 +9381,7 @@
+ 	error = avp->av_newstate(vap, nstate, arg);
+ 
+ 	/* Finally, start any timers. */
+-	if (nstate == IEEE80211_S_RUN) {
++	if (nstate == IEEE80211_S_RUN && !sc->sc_beacon_cal) {
+ 		/* start periodic recalibration timer */
+ 		mod_timer(&sc->sc_cal_ch, jiffies + (ath_calinterval * HZ));
+ 	}
+Index: madwifi-trunk-r3314/ath/if_athvar.h
+===================================================================
+--- madwifi-trunk-r3314.orig/ath/if_athvar.h	2008-02-06 20:27:08.969186784 +0100
++++ madwifi-trunk-r3314/ath/if_athvar.h	2008-02-06 20:27:24.670081522 +0100
+@@ -778,6 +778,8 @@
+ 	struct ieee80211vap **sc_bslot;		/* beacon xmit slots */
+ 	int sc_bnext;				/* next slot for beacon xmit */
+ 
++	int sc_beacon_cal;			/* use beacon timer for calibration */
++	u_int64_t sc_lastcal;			/* last time the calibration was performed */
+ 	struct timer_list sc_cal_ch;		/* calibration timer */
+ 	HAL_NODE_STATS sc_halstats;		/* station-mode rssi stats */
+