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ath9k: add a small hack to make changing the channel bandwidth to 5/10 mhz available through debugfs - does not work on all chipsets and is not recommended for production use yet

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SVN-Revision: 27340
This commit is contained in:
Felix Fietkau 2011-07-01 16:11:53 +00:00
parent aca1b30101
commit 9f38d4402b
1 changed files with 54 additions and 0 deletions
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54
package/mac80211/patches/540-ath9k_channelbw_debugfs.patch Normal file
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@ -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;