ath9k: add a small hack to make changing the channel bandwidth to 5/10 mhz available...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27340 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/540-ath9k_channelbw_debugfs.patch b/package/mac80211/patches/540-ath9k_channelbw_debugfs.patch
new file mode 100644 (file)
index 0000000..9c2c014
--- /dev/null
+++ b/package/mac80211/patches/540-ath9k_channelbw_debugfs.patch
@@ -0,0 +1,54 @@
+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
+@@ -586,6 +586,7 @@ struct ath_softc {
+       struct ieee80211_hw *hw;
+       struct device *dev;
+ 
++      u32 chan_bw;
+       int chan_idx;
+       int chan_is_ht;
+       struct survey_info *cur_survey;
+--- a/drivers/net/wireless/ath/ath9k/debug.c
++++ b/drivers/net/wireless/ath/ath9k/debug.c
+@@ -1281,6 +1281,9 @@ int ath9k_init_debug(struct ath_hw *ah)
+       debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
+                           &fops_eeprom);
+ 
++      debugfs_create_u32("chanbw", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
++                         &sc->chan_bw);
++
+       sc->debug.regidx = 0;
+       return 0;
+ }
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -226,6 +226,7 @@ static int ath_set_channel(struct ath_so
+       bool fastcc = true, stopped;
+       struct ieee80211_channel *channel = hw->conf.channel;
+       struct ath9k_hw_cal_data *caldata = NULL;
++      u32 oldflags;
+       int r;
+ 
+       if (sc->sc_flags & SC_OP_INVALID)
+@@ -268,6 +269,21 @@ static int ath_set_channel(struct ath_so
+       if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL))
+               fastcc = false;
+ 
++      oldflags = hchan->channelFlags;
++      switch (sc->chan_bw) {
++      case 5:
++              hchan->channelFlags &= ~CHANNEL_HALF;
++              hchan->channelFlags |= CHANNEL_QUARTER;
++              break;
++      case 10:
++              hchan->channelFlags &= ~CHANNEL_QUARTER;
++              hchan->channelFlags |= CHANNEL_HALF;
++              break;
++      }
++
++      if (oldflags != hchan->channelFlags)
++              fastcc = false;
++
+       if (!(sc->sc_flags & SC_OP_OFFCHANNEL))
+               caldata = &sc->caldata;
+