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ath5k: Adaptive Noise Immunity (ANI) Implementation

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This is an Adaptive Noise Imunity (ANI) implementation for ath5k. I have looked
at both ath9k and HAL sources (they are nearly the same), and even though i
have implemented some things differently, the basic algorithm is practically
the same, for now. I hope that this can serve as a clean start to improve the
algorithm later.

This also adds a possibility to manually control ANI settings, right now only
thru a debugfs file:
  * set lowest sensitivity (=highest noise immunity):
	echo sens-low > /sys/kernel/debug/ath5k/phy0/ani
  * set highest sensitivity (=lowest noise immunity):
	echo sens-high > /sys/kernel/debug/ath5k/phy0/ani
  * automatically control immunity (default):
	echo ani-on > /sys/kernel/debug/ath5k/phy0/ani
  * to see the parameters in use and watch them change:
	cat /sys/kernel/debug/ath5k/phy0/ani

Manually setting sensitivity will turn the automatic control off. You can also
control each of the five immunity parameters (noise immunity, spur immunity,
firstep, ofdm weak signal detection, cck weak signal detection) manually thru
the debugfs file.

This is tested on AR5414 and nearly doubles the thruput in a noisy 2GHz band.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf
2010-04-02 18:44:08 +09:00
committed by John W. Linville
parent bc53e5129c
commit 2111ac0d88
12 changed files with 1083 additions and 16 deletions
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2
drivers/net/wireless/ath/ath5k/debug.h
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@@ -76,6 +76,7 @@ struct ath5k_dbg_info {
struct dentry *debugfs_reset;
struct dentry *debugfs_antenna;
struct dentry *debugfs_frameerrors;
struct dentry *debugfs_ani;
};
/**
@@ -115,6 +116,7 @@ enum ath5k_debug_level {
ATH5K_DEBUG_DUMP_TX = 0x00000200,
ATH5K_DEBUG_DUMPBANDS = 0x00000400,
ATH5K_DEBUG_TRACE = 0x00001000,
ATH5K_DEBUG_ANI = 0x00002000,
ATH5K_DEBUG_ANY = 0xffffffff
};