From e3bb3bcd97ec4f07a2c77dd15c50546ab433651b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 9 Oct 2010 00:36:54 +0000
Subject: ath9k: implement extended channel utilization statistics via survey

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23350 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../patches/520-ath9k_common_clockrate.patch       | 116 +++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 package/mac80211/patches/520-ath9k_common_clockrate.patch

(limited to 'package/mac80211/patches/520-ath9k_common_clockrate.patch')

diff --git a/package/mac80211/patches/520-ath9k_common_clockrate.patch b/package/mac80211/patches/520-ath9k_common_clockrate.patch
new file mode 100644
index 0000000000..3266e0e103
--- /dev/null
+++ b/package/mac80211/patches/520-ath9k_common_clockrate.patch
@@ -0,0 +1,116 @@
+--- a/drivers/net/wireless/ath/ath.h
++++ b/drivers/net/wireless/ath/ath.h
+@@ -145,6 +145,8 @@ struct ath_common {
+ 	DECLARE_BITMAP(tkip_keymap, ATH_KEYMAX);
+ 	enum ath_crypt_caps crypt_caps;
+ 
++	unsigned int clockrate;
++
+ 	struct ath_regulatory regulatory;
+ 	const struct ath_ops *ops;
+ 	const struct ath_bus_ops *bus_ops;
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -91,29 +91,32 @@ static void ath9k_hw_ani_cache_ini_regs(
+ /* Helper Functions */
+ /********************/
+ 
+-static u32 ath9k_hw_mac_clks(struct ath_hw *ah, u32 usecs)
++static void ath9k_hw_set_clockrate(struct ath_hw *ah)
+ {
+ 	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
++	struct ath_common *common = ath9k_hw_common(ah);
++	unsigned int clockrate;
+ 
+ 	if (!ah->curchan) /* should really check for CCK instead */
+-		return usecs *ATH9K_CLOCK_RATE_CCK;
+-	if (conf->channel->band == IEEE80211_BAND_2GHZ)
+-		return usecs *ATH9K_CLOCK_RATE_2GHZ_OFDM;
+-
+-	if (ah->caps.hw_caps & ATH9K_HW_CAP_FASTCLOCK)
+-		return usecs * ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM;
++		clockrate = ATH9K_CLOCK_RATE_CCK;
++	else if (conf->channel->band == IEEE80211_BAND_2GHZ)
++		clockrate = ATH9K_CLOCK_RATE_2GHZ_OFDM;
++	else if (ah->caps.hw_caps & ATH9K_HW_CAP_FASTCLOCK)
++		clockrate = ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM;
+ 	else
+-		return usecs * ATH9K_CLOCK_RATE_5GHZ_OFDM;
++		clockrate = ATH9K_CLOCK_RATE_5GHZ_OFDM;
++
++	if (conf_is_ht40(conf))
++		clockrate *= 2;
++
++	common->clockrate = clockrate;
+ }
+ 
+ static u32 ath9k_hw_mac_to_clks(struct ath_hw *ah, u32 usecs)
+ {
+-	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
++	struct ath_common *common = ath9k_hw_common(ah);
+ 
+-	if (conf_is_ht40(conf))
+-		return ath9k_hw_mac_clks(ah, usecs) * 2;
+-	else
+-		return ath9k_hw_mac_clks(ah, usecs);
++	return usecs * common->clockrate;
+ }
+ 
+ bool ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout)
+@@ -1168,6 +1171,7 @@ static bool ath9k_hw_channel_change(stru
+ 			  "Failed to set channel\n");
+ 		return false;
+ 	}
++	ath9k_hw_set_clockrate(ah);
+ 
+ 	ah->eep_ops->set_txpower(ah, chan,
+ 			     ath9k_regd_get_ctl(regulatory, chan),
+@@ -1380,6 +1384,8 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ 	if (r)
+ 		return r;
+ 
++	ath9k_hw_set_clockrate(ah);
++
+ 	ENABLE_REGWRITE_BUFFER(ah);
+ 
+ 	for (i = 0; i < AR_NUM_DCU; i++)
+--- a/drivers/net/wireless/ath/ath9k/ani.c
++++ b/drivers/net/wireless/ath/ath9k/ani.c
+@@ -465,35 +465,13 @@ static void ath9k_hw_ani_lower_immunity(
+ 		ath9k_hw_set_cck_nil(ah, aniState->cckNoiseImmunityLevel - 1);
+ }
+ 
+-static u8 ath9k_hw_chan_2_clockrate_mhz(struct ath_hw *ah)
+-{
+-	struct ath9k_channel *chan = ah->curchan;
+-	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
+-	u8 clockrate; /* in MHz */
+-
+-	if (!ah->curchan) /* should really check for CCK instead */
+-		clockrate = ATH9K_CLOCK_RATE_CCK;
+-	else if (conf->channel->band == IEEE80211_BAND_2GHZ)
+-		clockrate = ATH9K_CLOCK_RATE_2GHZ_OFDM;
+-	else if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+-		clockrate = ATH9K_CLOCK_FAST_RATE_5GHZ_OFDM;
+-	else
+-		clockrate = ATH9K_CLOCK_RATE_5GHZ_OFDM;
+-
+-	if (conf_is_ht40(conf))
+-		return clockrate * 2;
+-
+-	return clockrate;
+-}
+-
+ static int32_t ath9k_hw_ani_get_listen_time(struct ath_hw *ah)
+ {
++	struct ath_common *common = ath9k_hw_common(ah);
+ 	int32_t listen_time;
+-	int32_t clock_rate;
+ 
+ 	ath9k_hw_update_cycle_counters(ah);
+-	clock_rate = ath9k_hw_chan_2_clockrate_mhz(ah) * 1000;
+-	listen_time = ah->listen_time / clock_rate;
++	listen_time = ah->listen_time / (common->clockrate * 1000);
+ 	ah->listen_time = 0;
+ 
+ 	return listen_time;
-- 
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