madwifi: clean up handling of various timings such as slot time, ack timeout, eifs time, etc.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15713 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 732 insertions, 4 deletions

diff --git a/package/madwifi/Makefile b/package/madwifi/Makefile
index f143f94e6e..8db820e5aa 100644
--- a/package/madwifi/Makefile
+++ b/package/madwifi/Makefile
@@ -151,7 +151,7 @@ ifeq ($(findstring PCI,$(BUS)),PCI)
   MADWIFI_AUTOLOAD+= ath_pci
 endif
 
-MADWIFI_APPLETS:=80211stats athchans athctrl athkey athstats wlanconfig ath_info
+MADWIFI_APPLETS:=80211stats athchans athkey athstats wlanconfig ath_info
 ifdef CONFIG_MADWIFI_DEBUG
   MADWIFI_APPLETS += athdebug 80211debug
 endif
diff --git a/package/madwifi/files/lib/wifi/madwifi.sh b/package/madwifi/files/lib/wifi/madwifi.sh
index a3cf4d75e1..1e5b0db4e9 100755
--- a/package/madwifi/files/lib/wifi/madwifi.sh
+++ b/package/madwifi/files/lib/wifi/madwifi.sh
@@ -219,9 +219,7 @@ enable_atheros() {
 		[ -n "$antrx" ] && sysctl -w dev."$device".rxantenna="$antrx" >&-
 		[ -n "$anttx" ] && sysctl -w dev."$device".txantenna="$anttx" >&-
 		[ -n "$softled" ] && sysctl -w dev."$device".softled="$softled" >&-
-
-		config_get distance "$device" distance
-		[ -n "$distance" ] && athctrl -i "$device" -d "$distance" >&-
+		[ -n "$distance" ] && sysctl -w dev."$device".distance="$distance" >&-
 
 		config_get rate "$vif" rate
 		[ -n "$rate" ] && iwconfig "$ifname" rate "${rate%%.*}"
diff --git a/package/madwifi/patches/424-timing.patch b/package/madwifi/patches/424-timing.patch
new file mode 100644
index 0000000000..47d08deefa
--- /dev/null
+++ b/package/madwifi/patches/424-timing.patch
@@ -0,0 +1,730 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -382,6 +382,7 @@ static u_int32_t ath_set_clamped_maxtxpo
+ static void ath_poll_disable(struct net_device *dev);
+ static void ath_poll_enable(struct net_device *dev);
+ static void ath_fetch_idle_time(struct ath_softc *sc);
++static void ath_set_timing(struct ath_softc *sc);
+ 
+ /* calibrate every 30 secs in steady state but check every second at first. */
+ static int ath_calinterval = ATH_SHORT_CALINTERVAL;
+@@ -1185,6 +1186,7 @@ ath_attach(u_int16_t devid, struct net_d
+ 	sc->sc_intmit = -1;
+ 	sc->sc_noise_immunity = -1;
+ 	sc->sc_ofdm_weak_det = -1;
++	sc->sc_coverage = 7; /* 2100 meters */
+ 
+ 	return 0;
+ bad3:
+@@ -2672,6 +2674,7 @@ ath_init(struct net_device *dev)
+ 	 */
+ 	ath_chan_change(sc, ic->ic_curchan);
+ 	ath_set_ack_bitrate(sc, sc->sc_ackrate);
++	ath_set_timing(sc);
+ 	dev->flags |= IFF_RUNNING;		/* we are ready to go */
+ 	ieee80211_start_running(ic);		/* start all VAPs */
+ #ifdef ATH_TX99_DIAG
+@@ -4483,17 +4486,52 @@ ath_mode_init(struct net_device *dev)
+  * Set the slot time based on the current setting.
+  */
+ static void
+-ath_settiming(struct ath_softc *sc)
++ath_set_timing(struct ath_softc *sc)
+ {
++	struct ieee80211com *ic = &sc->sc_ic;
+ 	struct ath_hal *ah = sc->sc_ah;
+-	u_int offset = getTimingOffset(sc);
++	struct ath_timings *t = &sc->sc_timings;
++	u_int offset = 9;
++
++	t->sifs = 16;
++	if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) {
++		offset = 20;
++		if (ic->ic_flags & IEEE80211_F_SHSLOT)
++			offset = 9;
++	} else if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) {
++		offset = 9;
++	}
++
++	if (IEEE80211_IS_CHAN_TURBO(ic->ic_curchan)) {
++		offset = 6;
++		t->sifs = 8;
++	} else if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan)) {
++		offset = 13;
++		t->sifs = 32;
++	} else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan)) {
++		offset = 21;
++		t->sifs = 64;
++	}
++
++	t->slot = offset + sc->sc_coverage;
++	t->ack = t->slot * 2 + 3;
++	t->cts = t->slot * 2 + 3;
+ 
+ 	if (sc->sc_slottimeconf > 0)
+-		ath_hal_setslottime(ah, offset + sc->sc_slottimeconf);
++		t->slot = sc->sc_slottimeconf;
+ 	if (sc->sc_acktimeconf > 0)
+-		ath_hal_setacktimeout(ah, 2 * offset + sc->sc_acktimeconf);
++		t->ack = sc->sc_acktimeconf;
+ 	if (sc->sc_ctstimeconf > 0)
+-		ath_hal_setctstimeout(ah, 2 * offset + sc->sc_ctstimeconf);
++		t->cts = sc->sc_ctstimeconf;
++
++	t->difs = 2 * t->sifs + t->slot;
++	t->eifs = t->sifs + t->difs + 3;
++
++	ath_hal_setslottime(ah, t->slot);
++	ath_hal_setacktimeout(ah, t->ack);
++	ath_hal_setctstimeout(ah, t->cts);
++	ath_hal_seteifstime(ah, t->eifs);
++
+ 	sc->sc_updateslot = OK;
+ }
+ 
+@@ -4515,7 +4553,7 @@ ath_updateslot(struct net_device *dev)
+ 	if (ic->ic_opmode == IEEE80211_M_HOSTAP)
+ 		sc->sc_updateslot = UPDATE;
+ 	else if (dev->flags & IFF_RUNNING)
+-		ath_settiming(sc);
++		ath_set_timing(sc);
+ }
+ 
+ #ifdef ATH_SUPERG_DYNTURBO
+@@ -5359,7 +5397,7 @@ ath_beacon_send(struct ath_softc *sc, in
+ 		sc->sc_updateslot = COMMIT;	/* commit next beacon */
+ 		sc->sc_slotupdate = slot;
+ 	} else if ((sc->sc_updateslot == COMMIT) && (sc->sc_slotupdate == slot))
+-		ath_settiming(sc);		/* commit change to hardware */
++		ath_set_timing(sc);		/* commit change to hardware */
+ 
+ 	if (bfaddr != 0) {
+ 		/*
+@@ -9429,7 +9467,8 @@ ath_set_coverageclass(struct ieee80211co
+ {
+ 	struct ath_softc *sc = ic->ic_dev->priv;
+ 
+-	ath_hal_setcoverageclass(sc->sc_ah, ic->ic_coverageclass, 0);
++	sc->sc_coverage = ic->ic_coverageclass * 3;
++	ath_set_timing(sc);
+ 
+ 	return;
+ }
+@@ -10950,6 +10989,7 @@ enum {
+ 	ATH_OFDM_WEAK_DET	= 29,
+ 	ATH_CHANBW		= 30,
+ 	ATH_OUTDOOR		= 31,
++	ATH_DISTANCE	= 32,
+ };
+ 
+ /*
+@@ -11162,21 +11202,31 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
+ 					sc->sc_slottimeconf = val;
+ 				else
+ 					sc->sc_slottimeconf = 0;
+-				ath_settiming(sc);
++				ath_set_timing(sc);
+ 				break;
+ 			case ATH_ACKTIMEOUT:
+ 				if (val > 0)
+ 					sc->sc_acktimeconf = val;
+ 				else
+ 					sc->sc_acktimeconf = 0;
+-				ath_settiming(sc);
++				ath_set_timing(sc);
+ 				break;
+ 			case ATH_CTSTIMEOUT:
+ 				if (val > 0)
+ 					sc->sc_ctstimeconf = val;
+ 				else
+ 					sc->sc_ctstimeconf = 0;
+-				ath_settiming(sc);
++				ath_set_timing(sc);
++				break;
++			case ATH_DISTANCE:
++				if (val > 0) {
++					sc->sc_coverage = ((val - 1) / 300) + 1;
++					ic->ic_coverageclass = ((sc->sc_coverage - 1) / 3) + 1;
++				} else {
++					sc->sc_coverage = 0;
++					ic->ic_coverageclass = 0;
++				}
++				ath_set_timing(sc);
+ 				break;
+ 			case ATH_SOFTLED:
+ 				if (val != sc->sc_softled) {
+@@ -11332,6 +11382,9 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
+ 		case ATH_CHANBW:
+ 			val = sc->sc_chanbw ?: 20;
+ 			break;
++		case ATH_DISTANCE:
++			val = sc->sc_coverage * 300;
++			break;
+ 		case ATH_SLOTTIME:
+ 			val = ath_hal_getslottime(ah);
+ 			break;
+@@ -11453,6 +11506,12 @@ static const ctl_table ath_sysctl_templa
+ 	  .extra2	= (void *)ATH_CTSTIMEOUT,
+ 	},
+ 	{ .ctl_name	= CTL_AUTO,
++	  .procname	= "distance",
++	  .mode		= 0644,
++	  .proc_handler	= ath_sysctl_halparam,
++	  .extra2	= (void *)ATH_DISTANCE,
++	},
++	{ .ctl_name	= CTL_AUTO,
+ 	  .procname	= "softled",
+ 	  .mode		= 0644,
+ 	  .proc_handler	= ath_sysctl_halparam,
+--- a/ath/if_ath_hal.h
++++ b/ath/if_ath_hal.h
+@@ -284,6 +284,17 @@ static inline u_int ath_hal_getslottime(
+ 	return ret;
+ }
+ 
++static inline u_int ath_hal_geteifstime(struct ath_hal *ah)
++{
++	u_int ret;
++	ATH_HAL_LOCK_IRQ(ah->ah_sc);
++	ath_hal_set_function(__func__);
++	ret = ah->ah_getEifsTime(ah);
++	ath_hal_set_function(NULL);
++	ATH_HAL_UNLOCK_IRQ(ah->ah_sc);
++	return ret;
++}
++
+ static inline void ath_hal_beaconinit(struct ath_hal *ah, u_int32_t nexttbtt,
+ 				      u_int32_t intval)
+ {
+@@ -841,6 +852,17 @@ static inline HAL_BOOL ath_hal_setslotti
+ 	return ret;
+ }
+ 
++static inline HAL_BOOL ath_hal_seteifstime(struct ath_hal *ah, u_int a1)
++{
++	HAL_BOOL ret;
++	ATH_HAL_LOCK_IRQ(ah->ah_sc);
++	ath_hal_set_function(__func__);
++	ret = ah->ah_setEifsTime(ah, a1);
++	ath_hal_set_function(NULL);
++	ATH_HAL_UNLOCK_IRQ(ah->ah_sc);
++	return ret;
++}
++
+ static inline void ath_hal_setledstate(struct ath_hal *ah, HAL_LED_STATE a1)
+ {
+ 	ATH_HAL_LOCK_IRQ(ah->ah_sc);
+--- a/ath/if_athvar.h
++++ b/ath/if_athvar.h
+@@ -613,6 +613,15 @@ struct ath_rp {
+ 	int       rp_analyzed;
+ };
+ 
++struct ath_timings {
++	u_int	slot;
++	u_int	ack;
++	u_int	cts;
++	u_int	sifs;
++	u_int	difs;
++	u_int	eifs;
++};
++
+ struct ath_softc {
+ 	struct ieee80211com sc_ic;		/* NB: must be first */
+ 	struct net_device *sc_dev;
+@@ -838,6 +847,8 @@ struct ath_softc {
+ 						 * detected radars */
+ 	u_int32_t sc_nexttbtt;
+ 	u_int64_t sc_last_tsf;
++	u_int sc_coverage;
++	struct ath_timings sc_timings;
+ };
+ 
+ typedef void (*ath_callback) (struct ath_softc *);
+@@ -945,49 +956,76 @@ int ar_device(int devid);
+ 	  DEV_NAME(_v->iv_ic->ic_dev))
+ 
+ void ath_radar_detected(struct ath_softc *sc, const char* message);
+-static inline u_int getTimingOffset(struct ath_softc *sc)
+-{
+-	struct ieee80211com *ic = &sc->sc_ic;
+-	u_int usec = 9;
+-	if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan)) {
+-		usec = 20;
+-		if (ic->ic_flags & IEEE80211_F_SHSLOT)
+-			usec = 9;
+-	} else if (IEEE80211_IS_CHAN_A(ic->ic_curchan))
+-		usec = 9;
+-
+-	if (IEEE80211_IS_CHAN_TURBO(ic->ic_curchan))
+-		usec = 6;
+-
+-	if (IEEE80211_IS_CHAN_HALF(ic->ic_curchan))
+-		usec = 13;
+-	else if (IEEE80211_IS_CHAN_QUARTER(ic->ic_curchan))
+-		usec = 21;
+-	return usec;
+-}
+ 
+-static inline void ath_get_timings(struct ath_softc *sc, u_int *t_slot, u_int *t_sifs, u_int *t_difs)
+-{
+-	struct ieee80211_channel *c = sc->sc_ic.ic_curchan;
++#ifndef MIN
++#define MIN(a,b)        ((a) < (b) ? (a) : (b))
++#endif
++#ifndef MAX
++#define MAX(a,b)        ((a) > (b) ? (a) : (b))
++#endif
+ 
+-	*t_slot = getTimingOffset(sc) + sc->sc_slottimeconf;
+ 
+-	if (IEEE80211_IS_CHAN_HALF(c)) {
+-		*t_sifs = 32;
+-		*t_difs = 56;
+-	} else if (IEEE80211_IS_CHAN_QUARTER(c)) {
+-		*t_sifs = 64;
+-		*t_difs = 112;
+-	} else if (IEEE80211_IS_CHAN_TURBO(c)) {
+-		*t_sifs = 8;
+-		*t_difs = 28;
+-	} else {
+-		*t_sifs = 16;
+-		*t_difs = 28;
+-	}
++/* Calculate the transmit duration of a frame. */
++static inline unsigned
++calc_usecs_unicast_packet(struct ath_softc *sc, int length,
++		int rix, int short_retries, int long_retries)
++{
++		const HAL_RATE_TABLE *rt = sc->sc_currates;
++		struct ieee80211com *ic = &sc->sc_ic;
++		struct ath_timings *t = &sc->sc_timings;
++		unsigned int x = 0, tt = 0;
++		unsigned int cix = rt->info[rix].controlRate;
++		int rts = 0, cts = 0;
++		int cw = ATH_DEFAULT_CWMIN;
++
++		KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
++
++		if (!rt->info[rix].rateKbps) {
++			printk(KERN_WARNING "rix %d (%d) bad ratekbps %d mode %u\n",
++			       rix, rt->info[rix].dot11Rate,
++			       rt->info[rix].rateKbps,
++			       sc->sc_curmode);
++			return 0;
++		}
++
++		if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
++			(rt->info[rix].phy == IEEE80211_T_OFDM)) {
++
++			if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
++				rts = 1;
++			else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
++				cts = 1;
++
++			cix = rt->info[sc->sc_protrix].controlRate;
++		}
++
++		if ((rts || cts) && rt->info[cix].rateKbps) {
++			int ctsrate = rt->info[cix].rateCode;
++			int ctsduration = 0;
++
++			ctsrate |= rt->info[cix].shortPreamble;
++			if (rts)	/* SIFS + CTS */
++				ctsduration += rt->info[cix].spAckDuration;
++
++			ctsduration += ath_hal_computetxtime(sc->sc_ah,
++							     rt, length, rix, AH_TRUE);
++
++			if (cts)	/* SIFS + ACK */
++				ctsduration += rt->info[cix].spAckDuration;
++
++			tt += (short_retries + 1) * ctsduration;
++		}
++		tt += t->difs;
++		tt += (long_retries + 1) * (t->sifs + rt->info[rix].spAckDuration);
++		tt += (long_retries + 1) * ath_hal_computetxtime(sc->sc_ah, rt, length,
++							rix, AH_TRUE);
++		for (x = 0; x <= short_retries + long_retries; x++) {
++			cw = MIN(ATH_DEFAULT_CWMAX, (cw + 1) * 2);
++			tt += (t->slot * cw / 2);
++		}
++		return tt;
+ }
+ 
+-
+ struct ath_hw_detect {
+ 	const char *vendor_name;
+ 	const char *card_name;
+--- a/ath_rate/minstrel/minstrel.c
++++ b/ath_rate/minstrel/minstrel.c
+@@ -170,85 +170,6 @@ rate_to_ndx(struct minstrel_node *sn, in
+ 		return -1;
+ }
+ 
+-/* Calculate the transmit duration of a frame. */
+-static unsigned
+-calc_usecs_unicast_packet(struct ath_softc *sc, int length,
+-		int rix, int short_retries, int long_retries)
+-{
+-		const HAL_RATE_TABLE *rt = sc->sc_currates;
+-		struct ieee80211com *ic = &sc->sc_ic;
+-		unsigned t_slot = 20;
+-		unsigned t_difs = 50;
+-		unsigned t_sifs = 10;
+-		unsigned int x = 0, tt = 0;
+-		unsigned int cix = rt->info[rix].controlRate;
+-		int rts = 0, cts = 0;
+-		int cw = ATH_DEFAULT_CWMIN;
+-
+-		KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
+-
+-		if (!rt->info[rix].rateKbps) {
+-			printk(KERN_WARNING "rix %d (%d) bad ratekbps %d mode %u\n",
+-			       rix, rt->info[rix].dot11Rate,
+-			       rt->info[rix].rateKbps,
+-			       sc->sc_curmode);
+-			return 0;
+-		}
+-
+-		ath_get_timings(sc, &t_slot, &t_sifs, &t_difs);
+-		if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
+-		(rt->info[rix].phy == IEEE80211_T_OFDM)) {
+-			if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
+-				rts = 1;
+-			else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
+-				cts = 1;
+-
+-			cix = rt->info[sc->sc_protrix].controlRate;
+-		}
+-
+-#if 0
+-		if (length > ic->ic_rtsthreshold)
+-			rts = 1;
+-#endif
+-
+-		if (rts || cts) {
+-			int ctsrate = rt->info[cix].rateCode;
+-			int ctsduration = 0;
+-
+-			if (!rt->info[cix].rateKbps) {
+-#if 0
+-				printk(KERN_WARNING "cix %d (%d) bad ratekbps %d mode %u\n",
+-				       cix, rt->info[cix].dot11Rate,
+-				       rt->info[cix].rateKbps,
+-				       sc->sc_curmode);
+-#endif
+-				return 0;
+-			}
+-
+-
+-			ctsrate |= rt->info[cix].shortPreamble;
+-			if (rts)	/* SIFS + CTS */
+-				ctsduration += rt->info[cix].spAckDuration;
+-
+-			ctsduration += ath_hal_computetxtime(sc->sc_ah,
+-							     rt, length, rix, AH_TRUE);
+-
+-			if (cts)	/* SIFS + ACK */
+-				ctsduration += rt->info[cix].spAckDuration;
+-
+-			tt += (short_retries + 1) * ctsduration;
+-		}
+-		tt += t_difs;
+-		tt += (long_retries + 1) * (t_sifs + rt->info[rix].spAckDuration);
+-		tt += (long_retries + 1) * ath_hal_computetxtime(sc->sc_ah, rt, length,
+-							rix, AH_TRUE);
+-		for (x = 0; x <= short_retries + long_retries; x++) {
+-			cw = MIN(ATH_DEFAULT_CWMAX, (cw + 1) * 2);
+-			tt += (t_slot * cw / 2);
+-		}
+-		return tt;
+-}
+-
+ static void
+ ath_rate_node_init(struct ath_softc *sc, struct ath_node *an)
+ {
+--- a/ath_rate/sample/sample.c
++++ b/ath_rate/sample/sample.c
+@@ -137,92 +137,6 @@ rate_to_ndx(struct sample_node *sn, int 
+ 	return -1;
+ }
+ 
+-/*
+- * Calculate the transmit duration of a frame.
+- */
+-static unsigned
+-calc_usecs_unicast_packet(struct ath_softc *sc, int length,
+-	int rix, int short_retries, int long_retries)
+-{
+-	const HAL_RATE_TABLE *rt = sc->sc_currates;
+-	int rts, cts;
+-
+-	unsigned t_slot;
+-	unsigned t_difs;
+-	unsigned t_sifs;
+-	struct ieee80211com *ic = &sc->sc_ic;
+-	unsigned int tt = 0;
+-	unsigned int x;
+-	unsigned int cw = ATH_DEFAULT_CWMIN;
+-	unsigned int cix = rt->info[rix].controlRate;
+-	KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
+-
+-	if (!rt->info[rix].rateKbps) {
+-		printk(KERN_WARNING "rix %u (%u) bad ratekbps %u mode %u\n",
+-		       rix, rt->info[rix].dot11Rate,
+-		       rt->info[rix].rateKbps,
+-		       sc->sc_curmode);
+-
+-		return 0;
+-	}
+-
+-	cix = rt->info[rix].controlRate;
+-	/* 
+-	 * XXX getting mac/phy level timings should be fixed for turbo
+-	 * rates, and there is probably a way to get this from the
+-	 * hal...
+-	 */
+-	ath_get_timings(sc, &t_slot, &t_sifs, &t_difs);
+-	rts = cts = 0;
+-
+-	if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
+-	    rt->info[rix].phy == IEEE80211_T_OFDM) {
+-		if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
+-			rts = 1;
+-		else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
+-			cts = 1;
+-
+-		cix = rt->info[sc->sc_protrix].controlRate;
+-	}
+-
+-	if (0 /*length > ic->ic_rtsthreshold */)
+-		rts = 1;
+-
+-	if (rts || cts) {
+-		int ctsrate;
+-		int ctsduration = 0;
+-
+-		if (!rt->info[cix].rateKbps) {
+-			printk(KERN_WARNING "cix %u (%u) bad ratekbps %u mode %u\n",
+-			       cix, rt->info[cix].dot11Rate,
+-			       rt->info[cix].rateKbps,
+-			       sc->sc_curmode);
+-			return 0;
+-		}
+-
+-
+-		ctsrate = rt->info[cix].rateCode | rt->info[cix].shortPreamble;
+-		if (rts)		/* SIFS + CTS */
+-			ctsduration += rt->info[cix].spAckDuration;
+-
+-		ctsduration += ath_hal_computetxtime(sc->sc_ah,
+-						     rt, length, rix, AH_TRUE);
+-
+-		if (cts)	/* SIFS + ACK */
+-			ctsduration += rt->info[cix].spAckDuration;
+-
+-		tt += (short_retries + 1) * ctsduration;
+-	}
+-	tt += t_difs;
+-	tt += (long_retries+1)*(t_sifs + rt->info[rix].spAckDuration);
+-	tt += (long_retries+1)*ath_hal_computetxtime(sc->sc_ah, rt, length,
+-						rix, AH_TRUE);
+-	for (x = 0; x <= short_retries + long_retries; x++) {
+-		cw = MIN(ATH_DEFAULT_CWMAX, (cw + 1) * 2);
+-		tt += (t_slot * cw / 2);
+-	}
+-	return tt;
+-}
+ 
+ static void
+ ath_rate_node_init(struct ath_softc *sc, struct ath_node *an)
+--- a/net80211/ieee80211_wireless.c
++++ b/net80211/ieee80211_wireless.c
+@@ -2736,6 +2736,7 @@ ieee80211_ioctl_setparam(struct net_devi
+ 	case IEEE80211_PARAM_COVERAGE_CLASS:
+ 		if (value <= IEEE80211_COVERAGE_CLASS_MAX) {
+ 			ic->ic_coverageclass = value;
++			ic->ic_set_coverageclass(ic);
+ 			if (IS_UP_AUTO(vap))
+ 				ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
+ 			retv = 0;
+--- a/net80211/ieee80211_var.h
++++ b/net80211/ieee80211_var.h
+@@ -94,7 +94,7 @@
+ 
+ #define IEEE80211_BGSCAN_TRIGGER_INTVL 20 /* min trigger interval for thresh based bgscan (secs) */
+ 
+-#define IEEE80211_COVERAGE_CLASS_MAX	31	/* max coverage class */
++#define IEEE80211_COVERAGE_CLASS_MAX	255	/* max coverage class */
+ #define IEEE80211_REGCLASSIDS_MAX	10	/* max regclass id list */
+ 
+ #define	IEEE80211_PS_SLEEP	0x1		/* STA is in power saving mode */
+--- a/tools/Makefile
++++ b/tools/Makefile
+@@ -50,7 +50,7 @@ all: compile
+ 
+ DEBUG = -DAR_DEBUG
+ 
+-ALLPROGS=	athstats 80211stats athkey athchans athctrl \
++ALLPROGS=	athstats 80211stats athkey athchans \
+ 	athdebug 80211debug wlanconfig ath_info
+ 
+ OBJS=	$(patsubst %,%.o,$(ALLPROGS))
+--- a/tools/athctrl.c
++++ /dev/null
+@@ -1,133 +0,0 @@
+-/*-
+- * Copyright (c) 2002-2004 Gunter Burchardt, Local-Web AG
+- * All rights reserved.
+- *
+- * Redistribution and use in source and binary forms, with or without
+- * modification, are permitted provided that the following conditions
+- * are met:
+- * 1. Redistributions of source code must retain the above copyright
+- *    notice, this list of conditions and the following disclaimer,
+- *    without modification.
+- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+- *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+- *    redistribution must be conditioned upon including a substantially
+- *    similar Disclaimer requirement for further binary redistribution.
+- * 3. Neither the names of the above-listed copyright holders nor the names
+- *    of any contributors may be used to endorse or promote products derived
+- *    from this software without specific prior written permission.
+- *
+- * Alternatively, this software may be distributed under the terms of the
+- * GNU General Public License ("GPL") version 2 as published by the Free
+- * Software Foundation.
+- *
+- * NO WARRANTY
+- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+- * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+- * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+- * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+- * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+- * THE POSSIBILITY OF SUCH DAMAGES.
+- *
+- * $Id: athctrl.c 2394 2007-05-30 01:41:18Z mtaylor $
+- */
+-
+-/*
+- * Simple Atheros-specific tool to inspect and set atheros specific values
+- * athctrl [-i interface] [-d distance]
+- * (default interface is wifi0).  
+- */
+-#include <sys/types.h>
+-#include <sys/file.h>
+-
+-#include <getopt.h>
+-
+-#include <stdio.h>
+-#include <string.h>
+-#include <stdlib.h>
+-#include <err.h>
+-
+-#include <net/if.h>
+-#include "do_multi.h"
+-
+-static int
+-setsysctrl(const char *dev, const char *control , u_long value)
+-{
+-	char buffer[256];
+-	FILE * fd;
+-
+-	snprintf(buffer, sizeof(buffer), "/proc/sys/dev/%s/%s", dev, control);
+-	fd = fopen(buffer, "w");
+-	if (fd != NULL) {
+-		fprintf(fd, "%li", value);
+-		fclose(fd);
+-	} else
+-		fprintf(stderr, "Could not open %s for writing!\n", buffer);
+-
+-	return 0;
+-}
+-
+-static void usage(void)
+-{
+-	fprintf(stderr,
+-	    "Atheros driver control\n"
+-	    "Copyright (c) 2002-2004 Gunter Burchardt, Local-Web AG\n"
+-	    "\n"
+-	    "usage: athctrl [-i interface] [-d distance]\n"
+-	    "\n"
+-	    "options:\n"
+-	    "   -h   show this usage\n"
+-	"   -i   interface (default interface is wifi0)\n"
+-	    "   -d   specify the maximum distance of a sta or the distance\n"
+-	"        of the master\n");
+-
+-	exit(1);
+-}
+-
+-int
+-CMD(athctrl)(int argc, char *argv[])
+-{
+-	char device[IFNAMSIZ + 1];
+-	int distance = -1;
+-	int c;
+-
+-	strncpy(device, "wifi0", sizeof (device));
+-
+-	for (;;) {
+-	    	c = getopt(argc, argv, "d:i:h");
+-	    	if (c < 0)
+-			break;
+-	    	switch (c) {
+-	    	case 'h':
+-			usage();
+-			break;
+-	    	case 'd':
+-			distance = atoi(optarg);
+-			break;
+-	    	case 'i':
+-			strncpy(device, optarg, sizeof (device));
+-			break;
+-	    	default:
+-			usage();
+-			break;
+-	    	}
+-	}
+-
+-	if (distance >= 0) {
+-		int slottime = (distance / 300) + ((distance % 300) ? 1 : 0);
+-		int acktimeout = slottime * 2 + 3;
+-		int ctstimeout = slottime * 2 + 3;
+-
+-		printf("Setting distance on interface %s to %i meters\n",
+-			device, distance);
+-		setsysctrl(device, "slottime", slottime);
+-		setsysctrl(device, "acktimeout", acktimeout);
+-		setsysctrl(device, "ctstimeout", ctstimeout);
+-	} else
+-		usage();
+-	return 0;
+-}
+--- a/tools/do_multi.c
++++ b/tools/do_multi.c
+@@ -18,8 +18,6 @@ main(int argc, char *argv[])
+ 	ret = a80211stats_init(argc, argv);
+     if(strcmp(progname, "athchans") == 0)
+ 	ret = athchans_init(argc, argv);
+-    if(strcmp(progname, "athctrl") == 0)
+-	ret =  athctrl_init(argc, argv);
+ #ifdef AR_DEBUG
+     if(strcmp(progname, "athdebug") == 0)
+ 	ret =  athdebug_init(argc, argv);
+--- a/tools/do_multi.h
++++ b/tools/do_multi.h
+@@ -2,7 +2,6 @@
+ int a80211debug_init(int argc, char *argv[]);
+ int a80211stats_init(int argc, char *argv[]);
+ int athchans_init(int argc, char *argv[]);
+-int athctrl_init(int argc, char *argv[]);
+ int athdebug_init(int argc, char *argv[]);
+ int athkey_init(int argc, char *argv[]);
+ int athstats_init(int argc, char *argv[]);