madwifi: clean up scanning code, add support for changing scan lists

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11315 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 890 insertions, 0 deletions

diff --git a/package/madwifi/patches/351-scanlist.patch b/package/madwifi/patches/351-scanlist.patch
new file mode 100644
index 0000000000..87ef5a97c4
--- /dev/null
+++ b/package/madwifi/patches/351-scanlist.patch
@@ -0,0 +1,890 @@
+Index: madwifi-trunk-r3314/net80211/ieee80211_scan_sta.c
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_scan_sta.c	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_scan_sta.c	2008-06-01 03:42:18.000000000 +0200
+@@ -317,147 +317,6 @@
+ #undef ISPROBE
+ }
+ 
+-static struct ieee80211_channel *
+-find11gchannel(struct ieee80211com *ic, int i, int freq)
+-{
+-	struct ieee80211_channel *c;
+-	int j;
+-
+-	/*
+-	 * The normal ordering in the channel list is b channel
+-	 * immediately followed by g so optimize the search for
+-	 * this.  We'll still do a full search just in case.
+-	 */
+-	for (j = i+1; j < ic->ic_nchans; j++) {
+-		c = &ic->ic_channels[j];
+-		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
+-			return c;
+-	}
+-	for (j = 0; j < i; j++) {
+-		c = &ic->ic_channels[j];
+-		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
+-			return c;
+-	}
+-	return NULL;
+-}
+-static const u_int chanflags[] = {
+-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_AUTO */
+-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
+-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
+-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
+-	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
+-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode look for AP in normal channel */
+-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
+-	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
+-};
+-
+-static void
+-add_channels(struct ieee80211com *ic,
+-	struct ieee80211_scan_state *ss,
+-	enum ieee80211_phymode mode, const u_int16_t freq[], int nfreq)
+-{
+-	struct ieee80211_channel *c, *cg;
+-	u_int modeflags;
+-	int i;
+-
+-	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
+-	modeflags = chanflags[mode];
+-	for (i = 0; i < nfreq; i++) {
+-		c = ieee80211_find_channel(ic, freq[i], modeflags);
+-		if (c == NULL || isclr(ic->ic_chan_active, c->ic_ieee))
+-			continue;
+-		if (mode == IEEE80211_MODE_AUTO) {
+-			/*
+-			 * XXX special-case 11b/g channels so we select
+-			 *     the g channel if both are present.
+-			 */
+-			if (IEEE80211_IS_CHAN_B(c) &&
+-			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
+-				c = cg;
+-		}
+-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
+-			break;
+-		ss->ss_chans[ss->ss_last++] = c;
+-	}
+-}
+-
+-static const u_int16_t rcl1[] =		/* 8 FCC channel: 52, 56, 60, 64, 36, 40, 44, 48 */
+-{ 5260, 5280, 5300, 5320, 5180, 5200, 5220, 5240 };
+-static const u_int16_t rcl2[] =		/* 4 MKK channels: 34, 38, 42, 46 */
+-{ 5170, 5190, 5210, 5230 };
+-static const u_int16_t rcl3[] =		/* 2.4Ghz ch: 1,6,11,7,13 */
+-{ 2412, 2437, 2462, 2442, 2472 };
+-static const u_int16_t rcl4[] =		/* 5 FCC channel: 149, 153, 161, 165 */
+-{ 5745, 5765, 5785, 5805, 5825 };
+-static const u_int16_t rcl7[] =		/* 11 ETSI channel: 100,104,108,112,116,120,124,128,132,136,140 */
+-{ 5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680, 5700 };
+-static const u_int16_t rcl8[] =		/* 2.4Ghz ch: 2,3,4,5,8,9,10,12 */
+-{ 2417, 2422, 2427, 2432, 2447, 2452, 2457, 2467 };
+-static const u_int16_t rcl9[] =		/* 2.4Ghz ch: 14 */
+-{ 2484 };
+-static const u_int16_t rcl10[] =	/* Added Korean channels 2312-2372 */
+-{ 2312, 2317, 2322, 2327, 2332, 2337, 2342, 2347, 2352, 2357, 2362, 2367, 2372 };
+-static const u_int16_t rcl11[] =	/* Added Japan channels in 4.9/5.0 spectrum */
+-{ 5040, 5060, 5080, 4920, 4940, 4960, 4980 };
+-#ifdef ATH_TURBO_SCAN
+-static const u_int16_t rcl5[] =		/* 3 static turbo channels */
+-{ 5210, 5250, 5290 };
+-static const u_int16_t rcl6[] =		/* 2 static turbo channels */
+-{ 5760, 5800 };
+-static const u_int16_t rcl6x[] =		/* 4 FCC3 turbo channels */
+-{ 5540, 5580, 5620, 5660 };
+-static const u_int16_t rcl12[] =		/* 2.4Ghz Turbo channel 6 */
+-{ 2437 };
+-static const u_int16_t rcl13[] =		/* dynamic Turbo channels */
+-{ 5200, 5240, 5280, 5765, 5805 };
+-#endif /* ATH_TURBO_SCAN */
+-
+-struct scanlist {
+-	u_int16_t	mode;
+-	u_int16_t	count;
+-	const u_int16_t	*list;
+-};
+-
+-#define	IEEE80211_MODE_TURBO_STATIC_A	IEEE80211_MODE_MAX
+-#define	X(a)	.count = sizeof(a)/sizeof(a[0]), .list = a
+-
+-static const struct scanlist staScanTable[] = {
+-	{ IEEE80211_MODE_11B,   		X(rcl3) },
+-	{ IEEE80211_MODE_11A,   		X(rcl1) },
+-	{ IEEE80211_MODE_11A,   		X(rcl2) },
+-	{ IEEE80211_MODE_11B,   		X(rcl8) },
+-	{ IEEE80211_MODE_11B,   		X(rcl9) },
+-	{ IEEE80211_MODE_11A,   		X(rcl4) },
+-#ifdef ATH_TURBO_SCAN
+-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl5) },
+-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl6) },
+-	{ IEEE80211_MODE_TURBO_A,		X(rcl6x) },
+-	{ IEEE80211_MODE_TURBO_A,		X(rcl13) },
+-#endif /* ATH_TURBO_SCAN */
+-	{ IEEE80211_MODE_11A,			X(rcl7) },
+-	{ IEEE80211_MODE_11B,			X(rcl10) },
+-	{ IEEE80211_MODE_11A,			X(rcl11) },
+-#ifdef ATH_TURBO_SCAN
+-	{ IEEE80211_MODE_TURBO_G,		X(rcl12) },
+-#endif /* ATH_TURBO_SCAN */
+-	{ .list = NULL }
+-};
+-
+-#undef X
+-
+-static int
+-checktable(const struct scanlist *scan, const struct ieee80211_channel *c)
+-{
+-	int i;
+-
+-	for (; scan->list != NULL; scan++) {
+-		for (i = 0; i < scan->count; i++)
+-			if (scan->list[i] == c->ic_freq)
+-				return 1;
+-	}
+-	return 0;
+-}
+-
+ /*
+  * Start a station-mode scan by populating the channel list.
+  */
+@@ -466,81 +325,14 @@
+ {
+ 	struct ieee80211com *ic = vap->iv_ic;
+ 	struct sta_table *st = ss->ss_priv;
+-	const struct scanlist *scan;
+ 	enum ieee80211_phymode mode;
+ 	struct ieee80211_channel *c;
+ 	int i;
+ 
+ 	ss->ss_last = 0;
+-	/*
+-	 * Use the table of ordered channels to construct the list
+-	 * of channels for scanning.  Any channels in the ordered
+-	 * list not in the master list will be discarded.
+-	 */
+-	for (scan = staScanTable; scan->list != NULL; scan++) {
+-		mode = scan->mode;
+-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
+-			/*
+-			 * If a desired mode was specified, scan only 
+-			 * channels that satisfy that constraint.
+-			 */
+-			if (vap->iv_des_mode != mode) {
+-				/*
+-				 * The scan table marks 2.4Ghz channels as b
+-				 * so if the desired mode is 11g, then use
+-				 * the 11b channel list but upgrade the mode.
+-				 */
+-				if (vap->iv_des_mode != IEEE80211_MODE_11G ||
+-				    mode != IEEE80211_MODE_11B)
+-					continue;
+-				mode = IEEE80211_MODE_11G;	/* upgrade */
+-			}
+-		} else {
+-			/*
+-			 * This lets ieee80211_scan_add_channels
+-			 * upgrade an 11b channel to 11g if available.
+-			 */
+-			if (mode == IEEE80211_MODE_11B)
+-				mode = IEEE80211_MODE_AUTO;
+-		}
+-		/* XR does not operate on turbo channels */
+-		if ((vap->iv_flags & IEEE80211_F_XR) &&
+-		    (mode == IEEE80211_MODE_TURBO_A ||
+-		     mode == IEEE80211_MODE_TURBO_G))
+-			continue;
+-		/*
+-		 * Add the list of the channels; any that are not
+-		 * in the master channel list will be discarded.
+-		 */
+-		add_channels(ic, ss, mode, scan->list, scan->count);
+-	}
+-
+-	/*
+-	 * Add the channels from the ic (from HAL) that are not present
+-	 * in the staScanTable.
+-	 */
+-	for (i = 0; i < ic->ic_nchans; i++) {
+-		c = &ic->ic_channels[i];
+-		/*
+-		 * scan dynamic turbo channels in normal mode.
+-		 */
+-		if (IEEE80211_IS_CHAN_DTURBO(c))
+-			continue;
+-		mode = ieee80211_chan2mode(c);
+-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
+-			/*
+-			 * If a desired mode was specified, scan only 
+-			 * channels that satisfy that constraint.
+-			 */
+-			if (vap->iv_des_mode != mode)
+-				continue;
+-
+-		}
+-		if (!checktable(staScanTable, c))
+-			ss->ss_chans[ss->ss_last++] = c;
+-	}
+-
++	ieee80211_scan_add_channels(ic, ss, vap->iv_des_mode);
+ 	ss->ss_next = 0;
++
+ 	/* XXX tunables */
+ 	/* 
+ 	 * The scanner will stay on station for ss_maxdwell ms (using a 
+@@ -749,17 +541,7 @@
+ 	fail = 0;
+ 	if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, se->se_chan)))
+ 		fail |= 0x01;
+-	/*
+-	 * NB: normally the desired mode is used to construct
+-	 * the channel list, but it's possible for the scan
+-	 * cache to include entries for stations outside this
+-	 * list so we check the desired mode here to weed them
+-	 * out.
+-	 */
+-	if (vap->iv_des_mode != IEEE80211_MODE_AUTO &&
+-	    (se->se_chan->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
+-	    chanflags[vap->iv_des_mode])
+-		fail |= 0x01;
++
+ 	if (vap->iv_opmode == IEEE80211_M_IBSS) {
+ 		if ((se->se_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
+ 			fail |= 0x02;
+@@ -1168,78 +950,6 @@
+ 	.scan_default		= ieee80211_sta_join,
+ };
+ 
+-/*
+- * Start an adhoc-mode scan by populating the channel list.
+- */
+-static int
+-adhoc_start(struct ieee80211_scan_state *ss, struct ieee80211vap *vap)
+-{
+-	struct ieee80211com *ic = vap->iv_ic;
+-	struct sta_table *st = ss->ss_priv;
+-	const struct scanlist *scan;
+-	enum ieee80211_phymode mode;
+-
+-	ss->ss_last = 0;
+-	/*
+-	 * Use the table of ordered channels to construct the list
+-	 * of channels for scanning.  Any channels in the ordered
+-	 * list not in the master list will be discarded.
+-	 */
+-	for (scan = staScanTable; scan->list != NULL; scan++) {
+-		mode = scan->mode;
+-		if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
+-			/*
+-			 * If a desired mode was specified, scan only 
+-			 * channels that satisfy that constraint.
+-			 */
+-			if (vap->iv_des_mode != mode) {
+-				/*
+-				 * The scan table marks 2.4Ghz channels as b
+-				 * so if the desired mode is 11g, then use
+-				 * the 11b channel list but upgrade the mode.
+-				 */
+-				if (vap->iv_des_mode != IEEE80211_MODE_11G ||
+-				    mode != IEEE80211_MODE_11B)
+-					continue;
+-				mode = IEEE80211_MODE_11G;	/* upgrade */
+-			}
+-		} else {
+-			/*
+-			 * This lets ieee80211_scan_add_channels
+-			 * upgrade an 11b channel to 11g if available.
+-			 */
+-			if (mode == IEEE80211_MODE_11B)
+-				mode = IEEE80211_MODE_AUTO;
+-		}
+-		/* XR does not operate on turbo channels */
+-		if ((vap->iv_flags & IEEE80211_F_XR) &&
+-		    (mode == IEEE80211_MODE_TURBO_A ||
+-		     mode == IEEE80211_MODE_TURBO_G))
+-			continue;
+-		/*
+-		 * Add the list of the channels; any that are not
+-		 * in the master channel list will be discarded.
+-		 */
+-		add_channels(ic, ss, mode, scan->list, scan->count);
+-	}
+-	ss->ss_next = 0;
+-	/* XXX tunables */
+-	ss->ss_mindwell = msecs_to_jiffies(200);	/* 200ms */
+-	ss->ss_maxdwell = msecs_to_jiffies(200);	/* 200ms */
+-
+-#ifdef IEEE80211_DEBUG
+-	if (ieee80211_msg_scan(vap)) {
+-		printk("%s: scan set ", vap->iv_dev->name);
+-		ieee80211_scan_dump_channels(ss);
+-		printk(" dwell min %ld max %ld\n",
+-			ss->ss_mindwell, ss->ss_maxdwell);
+-	}
+-#endif /* IEEE80211_DEBUG */
+-
+-	st->st_newscan = 1;
+-
+-	return 0;
+-}
+ 
+ /*
+  * Select a channel to start an adhoc network on.
+@@ -1405,7 +1115,7 @@
+ 	.scan_name		= "default",
+ 	.scan_attach		= sta_attach,
+ 	.scan_detach		= sta_detach,
+-	.scan_start		= adhoc_start,
++	.scan_start		= sta_start,
+ 	.scan_restart		= sta_restart,
+ 	.scan_cancel		= sta_cancel,
+ 	.scan_end		= adhoc_pick_bss,
+Index: madwifi-trunk-r3314/net80211/ieee80211.c
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211.c	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211.c	2008-06-01 03:42:18.000000000 +0200
+@@ -278,6 +278,11 @@
+ 			("channel with bogus ieee number %u", c->ic_ieee));
+ 		setbit(ic->ic_chan_avail, c->ic_ieee);
+ 
++		if (c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT)
++			c->ic_scanflags |= IEEE80211_NOSCAN_SET;
++		else
++			c->ic_scanflags &= ~IEEE80211_NOSCAN_SET;
++
+ 		/* Identify mode capabilities. */
+ 		if (IEEE80211_IS_CHAN_A(c))
+ 			ic->ic_modecaps |= 1 << IEEE80211_MODE_11A;
+Index: madwifi-trunk-r3314/net80211/_ieee80211.h
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/_ieee80211.h	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/_ieee80211.h	2008-06-01 03:42:18.000000000 +0200
+@@ -132,6 +132,11 @@
+ 	IEEE80211_SCAN_FIRST	= 2,	/* take first suitable candidate */
+ };
+ 
++enum ieee80211_scanflags {
++	IEEE80211_NOSCAN_DEFAULT = (1 << 0),
++	IEEE80211_NOSCAN_SET     = (1 << 1),
++};
++
+ /*
+  * Channels are specified by frequency and attributes.
+  */
+@@ -142,6 +147,7 @@
+ 	int8_t ic_maxregpower;	/* maximum regulatory tx power in dBm */
+ 	int8_t ic_maxpower;	/* maximum tx power in dBm */
+ 	int8_t ic_minpower;	/* minimum tx power in dBm */
++	u_int8_t ic_scanflags;
+ };
+ 
+ #define	IEEE80211_CHAN_MAX	255
+Index: madwifi-trunk-r3314/net80211/ieee80211_ioctl.h
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_ioctl.h	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_ioctl.h	2008-06-01 03:42:18.000000000 +0200
+@@ -555,6 +555,7 @@
+ #define	IEEE80211_IOCTL_WDSADDMAC	(SIOCIWFIRSTPRIV+26)
+ #define	IEEE80211_IOCTL_WDSDELMAC	(SIOCIWFIRSTPRIV+28)
+ #define	IEEE80211_IOCTL_KICKMAC		(SIOCIWFIRSTPRIV+30)
++#define	IEEE80211_IOCTL_SETSCANLIST	(SIOCIWFIRSTPRIV+31)
+ 
+ enum {
+ 	IEEE80211_WMMPARAMS_CWMIN       = 1,
+Index: madwifi-trunk-r3314/net80211/ieee80211_scan_ap.c
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_scan_ap.c	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_scan_ap.c	2008-06-01 03:42:18.000000000 +0200
+@@ -129,131 +129,7 @@
+ 
+ static int ap_flush(struct ieee80211_scan_state *);
+ static void action_tasklet(IEEE80211_TQUEUE_ARG);
+-static struct ieee80211_channel *find11gchannel(struct ieee80211com *ic, 
+-		int i, int freq);
+ 
+-static const u_int chanflags[] = {
+-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_AUTO */
+-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
+-	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
+-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
+-	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
+-	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode 
+-							      * look for AP in 
+-							      * normal channel 
+-							      */
+-	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
+-	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
+-};
+-
+-static const u_int16_t rcl1[] =		/* 8 FCC channel: 52, 56, 60, 64, 
+-					 *                36, 40, 44, 48 */
+-{ 5260, 5280, 5300, 5320, 5180, 5200, 5220, 5240 };
+-static const u_int16_t rcl2[] =		/* 4 MKK channels: 34, 38, 42, 46 */
+-{ 5170, 5190, 5210, 5230 };
+-static const u_int16_t rcl3[] =		/* 2.4Ghz ch: 1,6,11,7,13 */
+-{ 2412, 2437, 2462, 2442, 2472 };
+-static const u_int16_t rcl4[] =		/* 5 FCC channel: 149, 153, 161, 165 */
+-{ 5745, 5765, 5785, 5805, 5825 };
+-static const u_int16_t rcl7[] =		/* 11 ETSI channel: 100, 104, 108, 112,
+-					 *                  116, 120, 124, 128, 
+-					 *                  132, 136, 140 */
+-{ 5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680, 5700 };
+-static const u_int16_t rcl8[] =		/* 2.4Ghz ch: 2,3,4,5,8,9,10,12 */
+-{ 2417, 2422, 2427, 2432, 2447, 2452, 2457, 2467 };
+-static const u_int16_t rcl9[] =		/* 2.4Ghz ch: 14 */
+-{ 2484 };
+-static const u_int16_t rcl10[] =	/* Added Korean channels 2312-2372 */
+-{ 2312, 2317, 2322, 2327, 2332, 2337, 2342, 2347, 2352, 2357, 2362, 2367, 2372 };
+-static const u_int16_t rcl11[] =	/* Added Japan channels in 4.9/5.0 spectrum */
+-{ 5040, 5060, 5080, 4920, 4940, 4960, 4980 };
+-#ifdef ATH_TURBO_SCAN
+-static const u_int16_t rcl5[] =		/* 3 static turbo channels */
+-{ 5210, 5250, 5290 };
+-static const u_int16_t rcl6[] =		/* 2 static turbo channels */
+-{ 5760, 5800 };
+-static const u_int16_t rcl6x[] =		/* 4 FCC3 turbo channels */
+-{ 5540, 5580, 5620, 5660 };
+-static const u_int16_t rcl12[] =		/* 2.4Ghz Turbo channel 6 */
+-{ 2437 };
+-static const u_int16_t rcl13[] =		/* dynamic Turbo channels */
+-{ 5200, 5240, 5280, 5765, 5805 };
+-#endif /* ATH_TURBO_SCAN */
+-
+-struct scanlist {
+-	u_int16_t	mode;
+-	u_int16_t	count;
+-	const u_int16_t	*list;
+-};
+-
+-#define	IEEE80211_MODE_TURBO_STATIC_A	IEEE80211_MODE_MAX
+-#define	X(a)	.count = ARRAY_SIZE(a), .list = a
+-
+-static const struct scanlist staScanTable[] = {
+-	{ IEEE80211_MODE_11B,   		X(rcl3)  },
+-	{ IEEE80211_MODE_11A,   		X(rcl1)  },
+-	{ IEEE80211_MODE_11A,   		X(rcl2)  },
+-	{ IEEE80211_MODE_11B,   		X(rcl8)  },
+-	{ IEEE80211_MODE_11B,   		X(rcl9)  },
+-	{ IEEE80211_MODE_11A,   		X(rcl4)  },
+-#ifdef ATH_TURBO_SCAN
+-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl5)  },
+-	{ IEEE80211_MODE_TURBO_STATIC_A,	X(rcl6)  },
+-	{ IEEE80211_MODE_TURBO_A,		X(rcl6x) },
+-	{ IEEE80211_MODE_TURBO_A,		X(rcl13) },
+-#endif /* ATH_TURBO_SCAN */
+-	{ IEEE80211_MODE_11A,			X(rcl7)  },
+-	{ IEEE80211_MODE_11B,			X(rcl10) },
+-	{ IEEE80211_MODE_11A,			X(rcl11) },
+-#ifdef ATH_TURBO_SCAN
+-	{ IEEE80211_MODE_TURBO_G,		X(rcl12) },
+-#endif /* ATH_TURBO_SCAN */
+-	{ .list = NULL }
+-};
+-
+-#undef X
+-/* This function must be invoked with locks acquired */
+-static void
+-add_channels(struct ieee80211com *ic,
+-	struct ieee80211_scan_state *ss,
+-	enum ieee80211_phymode mode, const u_int16_t freq[], int nfreq)
+-{
+-	struct ieee80211_channel *c, *cg;
+-	u_int modeflags;
+-	int i;
+-
+-	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
+-	modeflags = chanflags[mode];
+-	for (i = 0; i < nfreq; i++) {
+-		c = ieee80211_find_channel(ic, freq[i], modeflags);
+-		if ((c == NULL) || isclr(ic->ic_chan_active, c->ic_ieee))
+-			continue;
+-		if (mode == IEEE80211_MODE_AUTO) {
+-			/* XXX special-case 11b/g channels so we select
+-			 *     the g channel if both are present. */
+-			if (IEEE80211_IS_CHAN_B(c) &&
+-			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
+-				c = cg;
+-		}
+-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
+-			break;
+-		ss->ss_chans[ss->ss_last++] = c;
+-	}
+-}
+-
+-/* This function must be invoked with locks acquired */
+-static int
+-checktable(const struct scanlist *scan, const struct ieee80211_channel *c)
+-{
+-	int i;
+-
+-	for (; scan->list != NULL; scan++) {
+-		for (i = 0; i < scan->count; i++)
+-			if (scan->list[i] == c->ic_freq)
+-				return 1;
+-	}
+-	return 0;
+-}
+ 
+ /*
+  * Attach prior to any scanning work.
+@@ -327,29 +203,6 @@
+ 		ieee80211_saveie(iep, ie);
+ }
+ 
+-/* This function must be invoked with locks acquired */
+-static struct ieee80211_channel *
+-find11gchannel(struct ieee80211com *ic, int i, int freq)
+-{
+-	struct ieee80211_channel *c;
+-	int j;
+-
+-	/* The normal ordering in the channel list is b channel
+-	 * immediately followed by g so optimize the search for
+-	 * this.  We'll still do a full search just in case. */
+-	for (j = i + 1; j < ic->ic_nchans; j++) {
+-		c = &ic->ic_channels[j];
+-		if ((c->ic_freq == freq) && IEEE80211_IS_CHAN_ANYG(c))
+-			return c;
+-	}
+-	for (j = 0; j < i; j++) {
+-		c = &ic->ic_channels[j];
+-		if ((c->ic_freq == freq) && IEEE80211_IS_CHAN_ANYG(c))
+-			return c;
+-	}
+-	return NULL;
+-}
+-
+ /*
+  * Start an ap scan by populating the channel list.
+  */
+@@ -358,8 +211,6 @@
+ {
+ 	struct ap_state *as 	    = ss->ss_priv;
+ 	struct ieee80211com *ic     = NULL;
+-	const struct scanlist *sl   = NULL;
+-	struct ieee80211_channel *c = NULL;
+ 	int i;
+ 	unsigned int mode = 0;
+ 
+@@ -368,80 +219,8 @@
+ 	/* Determine mode flags to match, or leave zero for auto mode */
+ 	as->as_vap_desired_mode = vap->iv_des_mode;
+ 	as->as_required_mode    = 0;
+-	if (as->as_vap_desired_mode != IEEE80211_MODE_AUTO) {
+-		as->as_required_mode = chanflags[as->as_vap_desired_mode];
+-		if ((vap->iv_ath_cap & IEEE80211_ATHC_TURBOP) && 
+-		    (as->as_required_mode != IEEE80211_CHAN_ST)) {
+-			/* Fixup for dynamic turbo flags */
+-			if (as->as_vap_desired_mode == IEEE80211_MODE_11G)
+-				as->as_required_mode = IEEE80211_CHAN_108G;
+-			else
+-				as->as_required_mode = IEEE80211_CHAN_108A;
+-		}
+-	}
+-
+-	ss->ss_last = 0;
+-	/* Use the table of ordered channels to construct the list
+-	 * of channels for scanning.  Any channels in the ordered
+-	 * list not in the master list will be discarded. */
+-	for (sl = staScanTable; sl->list != NULL; sl++) {
+-		mode = sl->mode;
+-
+-		/* The scan table marks 2.4Ghz channels as b
+-		 * so if the desired mode is 11g, then use
+-		 * the 11b channel list but upgrade the mode. */
+-		if (as->as_vap_desired_mode &&
+-		    (as->as_vap_desired_mode != mode) && 
+-		    (as->as_vap_desired_mode == IEEE80211_MODE_11G) && 
+-		    (mode == IEEE80211_MODE_11B))
+-			mode = IEEE80211_MODE_11G;
+-
+-		/* If we are in "AUTO" mode, upgrade the mode to auto. 
+-		 * This lets add_channels upgrade an 11b channel to 
+-		 * 11g if available. */
+-		if (!as->as_vap_desired_mode && (mode == IEEE80211_MODE_11B))
+-			mode = IEEE80211_MODE_AUTO;
+-
+-		/* Add the list of the channels; any that are not
+-		 * in the master channel list will be discarded. */
+-		add_channels(ic, ss, mode, sl->list, sl->count);
+-	}
+-
+-	/* Add the channels from the ic (from HAL) that are not present
+-	 * in the staScanTable, assuming they pass the sanity checks... */
+-	for (i = 0; i < ic->ic_nchans; i++) {
+-		c = &ic->ic_channels[i];
+-
+-		/* XR is not supported on turbo channels */
+-		if (IEEE80211_IS_CHAN_TURBO(c) && vap->iv_flags & IEEE80211_F_XR)
+-			continue;
++	ieee80211_scan_add_channels(ic, ss, vap->iv_des_mode);
+ 
+-		/* Dynamic channels are scanned in base mode */
+-		if (!as->as_required_mode && !IEEE80211_IS_CHAN_ST(c))
+-			continue;
+-
+-		/* Use any 11g channel instead of 11b one. */
+-		if (vap->iv_des_mode == IEEE80211_MODE_AUTO && 
+-		    IEEE80211_IS_CHAN_B(c) &&
+-		    find11gchannel(ic, i, c->ic_freq))
+-			continue;
+-
+-		/* Do not add channels already put into the scan list by the
+-		 * scan table - these have already been filtered by mode
+-		 * and for whether they are in the active channel list. */
+-		if (checktable(staScanTable, c))
+-			continue;
+-
+-		/* Make sure the channel is active */
+-		if ((c == NULL) || isclr(ic->ic_chan_active, c->ic_ieee))
+-			continue;
+-
+-		/* Don't overrun */
+-		if (ss->ss_last >= IEEE80211_SCAN_MAX)
+-			break;
+-
+-		ss->ss_chans[ss->ss_last++] = c;
+-	}
+ 	ss->ss_next = 0;
+ 	/* XXX tunables */
+ 	ss->ss_mindwell = msecs_to_jiffies(200);	/* 200ms */
+@@ -759,13 +538,6 @@
+ 		if (IEEE80211_IS_CHAN_RADAR(c->chan))
+ 			continue;
+ 
+-		/* Do not select 802.11a ST if mode is specified and is not 
+-		 * 802.11a ST */
+-		if (as->as_required_mode &&
+-		    IEEE80211_IS_CHAN_STURBO(c->chan) &&
+-		    (as->as_vap_desired_mode != IEEE80211_MODE_TURBO_STATIC_A))
+-			continue;
+-
+ 		/* Verify mode matches any fixed mode specified */
+ 		if((c->chan->ic_flags & as->as_required_mode) != 
+ 				as->as_required_mode)
+Index: madwifi-trunk-r3314/net80211/ieee80211_scan.c
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_scan.c	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_scan.c	2008-06-01 03:42:18.000000000 +0200
+@@ -958,6 +958,79 @@
+ 	}
+ }
+ 
++static const u_int chanflags[] = {
++	0,	/* IEEE80211_MODE_AUTO */
++	IEEE80211_CHAN_A,	/* IEEE80211_MODE_11A */
++	IEEE80211_CHAN_B,	/* IEEE80211_MODE_11B */
++	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_11G */
++	IEEE80211_CHAN_FHSS,	/* IEEE80211_MODE_FH */
++	IEEE80211_CHAN_A,	/* IEEE80211_MODE_TURBO_A */ /* for turbo mode look for AP in normal channel */
++	IEEE80211_CHAN_PUREG,	/* IEEE80211_MODE_TURBO_G */
++	IEEE80211_CHAN_ST,	/* IEEE80211_MODE_TURBO_STATIC_A */
++};
++
++static struct ieee80211_channel *
++find11gchannel(struct ieee80211com *ic, int i, int freq)
++{
++	struct ieee80211_channel *c;
++	int j;
++
++	/*
++	 * The normal ordering in the channel list is b channel
++	 * immediately followed by g so optimize the search for
++	 * this.  We'll still do a full search just in case.
++	 */
++	for (j = i+1; j < ic->ic_nchans; j++) {
++		c = &ic->ic_channels[j];
++		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
++			return c;
++	}
++	for (j = 0; j < i; j++) {
++		c = &ic->ic_channels[j];
++		if (c->ic_freq == freq && IEEE80211_IS_CHAN_ANYG(c))
++			return c;
++	}
++	return NULL;
++}
++
++
++void
++ieee80211_scan_add_channels(struct ieee80211com *ic,
++	struct ieee80211_scan_state *ss,
++	enum ieee80211_phymode mode)
++{
++	struct ieee80211_channel *c, *cg;
++	u_int modeflags;
++	int i;
++
++	KASSERT(mode < ARRAY_SIZE(chanflags), ("Unexpected mode %u", mode));
++	modeflags = chanflags[mode];
++	for (i = 0; i < ic->ic_nchans; i++) {
++		c = &ic->ic_channels[i];
++		if (c == NULL || isclr(ic->ic_chan_active, c->ic_ieee))
++			continue;
++		if (c->ic_scanflags & IEEE80211_NOSCAN_SET)
++			continue;
++		if (modeflags &&
++			((c->ic_flags & IEEE80211_CHAN_ALLTURBO) !=
++			 (modeflags & IEEE80211_CHAN_ALLTURBO)))
++			continue;
++		if (mode == IEEE80211_MODE_AUTO) {
++			/*
++			 * XXX special-case 11b/g channels so we select
++			 *     the g channel if both are present.
++			 */
++			if (IEEE80211_IS_CHAN_B(c) &&
++			    (cg = find11gchannel(ic, i, c->ic_freq)) != NULL)
++				continue;
++		}
++		if (ss->ss_last >= IEEE80211_SCAN_MAX)
++			break;
++		ss->ss_chans[ss->ss_last++] = c;
++	}
++}
++
++
+ /*
+  * Execute radar channel change. This is called when a radar/dfs
+  * signal is detected.  AP mode only.  Return 1 on success, 0 on
+Index: madwifi-trunk-r3314/net80211/ieee80211_scan.h
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_scan.h	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_scan.h	2008-06-01 03:42:18.000000000 +0200
+@@ -219,4 +219,7 @@
+ void ieee80211_scanner_unregister(enum ieee80211_opmode,
+ 	const struct ieee80211_scanner *);
+ void ieee80211_scanner_unregister_all(const struct ieee80211_scanner *);
++void ieee80211_scan_add_channels(struct ieee80211com *ic,
++	struct ieee80211_scan_state *ss,
++	enum ieee80211_phymode mode);
+ #endif /* _NET80211_IEEE80211_SCAN_H_ */
+Index: madwifi-trunk-r3314/net80211/ieee80211_wireless.c
+===================================================================
+--- madwifi-trunk-r3314.orig/net80211/ieee80211_wireless.c	2008-06-01 03:41:58.000000000 +0200
++++ madwifi-trunk-r3314/net80211/ieee80211_wireless.c	2008-06-01 03:42:53.000000000 +0200
+@@ -3873,6 +3873,106 @@
+ 	return ieee80211_ioctl_setmlme(dev, info, w, (char *)&mlme);
+ }
+ 
++static inline void setflag(struct ieee80211_channel *c, int flag)
++{
++	if (flag)
++		c->ic_scanflags |= IEEE80211_NOSCAN_SET;
++	else
++		c->ic_scanflags &= ~IEEE80211_NOSCAN_SET;
++}
++
++static void setscanflag(struct ieee80211com *ic, int min, int max, int set)
++{
++	int i;
++
++	for (i = 0; i < ic->ic_nchans; i++) {
++		struct ieee80211_channel *c = &ic->ic_channels[i];
++
++		if (min == -1) {
++			if (!(c->ic_scanflags & IEEE80211_NOSCAN_DEFAULT))
++				setflag(c, set);
++		} else if ((c->ic_freq >= min) && (c->ic_freq <= max)) {
++			setflag(c, set);
++		}
++	}
++}
++
++static int
++ieee80211_ioctl_setscanlist(struct net_device *dev,
++	struct iw_request_info *info,
++	struct iw_point *data, char *extra)
++{
++	struct ieee80211vap *vap = dev->priv;
++	struct ieee80211com *ic = vap->iv_ic;
++	char *s, *next;
++	int val = 1;
++
++	if (data->length <= 0)
++		return -EINVAL;
++
++	s = kmalloc(data->length + 1, GFP_KERNEL);
++	if (!s)
++		return -ENOMEM;
++
++	memset(s, 0, data->length + 1);
++	if (copy_from_user(s, data->pointer, data->length))
++		return -EFAULT;
++
++	s[data->length - 1] = '\0';		/* ensure null termination */
++
++	switch(*s) {
++		case '-':
++			val = 1;
++			break;
++		case '+':
++			val = 0;
++			break;
++		default:
++			goto error;
++	}
++	s++;
++	next = s;
++	do {
++		next = strchr(s, ',');
++		if (next) {
++			*next = 0;
++			next++;
++		}
++		if (!strcmp(s, "ALL")) {
++			setscanflag(ic, 0, 10000, val);
++		} else if (!strcmp(s, "REG")) {
++			setscanflag(ic, -1, -1, val);
++		} else {
++			int min, max;
++			char *n, *end = NULL;
++
++			n = strchr(s, '-');
++			if (n) {
++				*n = 0;
++				n++;
++			}
++			min = simple_strtoul(s, &end, 10);
++			if (end && *end)
++				goto error;
++			if (n) {
++				max = simple_strtoul(n, &end, 10);
++				if (end && *end)
++					goto error;
++			} else {
++				max = min;
++			}
++			setscanflag(ic, min, max, val);
++		}
++		s = next;
++	} while (next);
++	return 0;
++
++error:
++	if (s)
++		kfree(s);
++	return -EINVAL;
++}
++
+ static int
+ ieee80211_ioctl_addmac(struct net_device *dev, struct iw_request_info *info,
+ 	void *w, char *extra)
+@@ -5656,6 +5756,8 @@
+ 	 IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "minrate"},
+ 	{IEEE80211_PARAM_MINRATE,
+ 	 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_minrate"},
++	{ IEEE80211_IOCTL_SETSCANLIST,
++	 IW_PRIV_TYPE_CHAR | 255, 0, "setscanlist"},
+ 
+ #ifdef ATH_REVERSE_ENGINEERING
+ 	/*
+@@ -5753,6 +5855,7 @@
+ 	set_priv(IEEE80211_IOCTL_WDSADDMAC, ieee80211_ioctl_wdsmac),
+ 	set_priv(IEEE80211_IOCTL_WDSDELMAC, ieee80211_ioctl_wdsdelmac),
+ 	set_priv(IEEE80211_IOCTL_KICKMAC, ieee80211_ioctl_kickmac),
++	set_priv(IEEE80211_IOCTL_SETSCANLIST, ieee80211_ioctl_setscanlist),
+ #ifdef ATH_REVERSE_ENGINEERING
+ 	set_priv(IEEE80211_IOCTL_READREG, ieee80211_ioctl_readreg),
+ 	set_priv(IEEE80211_IOCTL_WRITEREG, ieee80211_ioctl_writereg),