From 37f16a175ead6785797d525bd04ab1caa37f2e60 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 5 Dec 2011 14:20:25 +0000
Subject: [PATCH] ath9k: fix 5/10 mhz channel bandwidth issues

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29437 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 ...43-ath9k_fix_half_quarter_rx_latency.patch | 32 ++++++++++++++
 .../544-ath9k_fix_half_quarter_sifs.patch     | 44 +++++++++++++++++++
 2 files changed, 76 insertions(+)
 create mode 100644 package/mac80211/patches/543-ath9k_fix_half_quarter_rx_latency.patch
 create mode 100644 package/mac80211/patches/544-ath9k_fix_half_quarter_sifs.patch

diff --git a/package/mac80211/patches/543-ath9k_fix_half_quarter_rx_latency.patch b/package/mac80211/patches/543-ath9k_fix_half_quarter_rx_latency.patch
new file mode 100644
index 0000000000..45246ea468
--- /dev/null
+++ b/package/mac80211/patches/543-ath9k_fix_half_quarter_rx_latency.patch
@@ -0,0 +1,32 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1006,16 +1006,26 @@ void ath9k_hw_init_global_settings(struc
+ 
+ 	if (IS_CHAN_HALF_RATE(chan)) {
+ 		eifs = 175;
+-		rx_lat *= 2;
++
++		if (!AR_SREV_9300_20_OR_LATER(ah))
++			rx_lat = 10;
++		else
++			rx_lat *= 2;
++
+ 		tx_lat *= 2;
+ 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+-		    tx_lat += 11;
++			tx_lat += 11;
+ 
+ 		slottime = 13;
+ 		sifstime = 32;
+ 	} else if (IS_CHAN_QUARTER_RATE(chan)) {
+ 		eifs = 340;
+-		rx_lat = (rx_lat * 4) - 1;
++
++		if (!AR_SREV_9300_20_OR_LATER(ah))
++			rx_lat = 20;
++		else
++			rx_lat = (rx_lat * 4) - 1;
++
+ 		tx_lat *= 4;
+ 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+ 		    tx_lat += 22;
diff --git a/package/mac80211/patches/544-ath9k_fix_half_quarter_sifs.patch b/package/mac80211/patches/544-ath9k_fix_half_quarter_sifs.patch
new file mode 100644
index 0000000000..6bde7659f2
--- /dev/null
+++ b/package/mac80211/patches/544-ath9k_fix_half_quarter_sifs.patch
@@ -0,0 +1,44 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1007,31 +1007,35 @@ void ath9k_hw_init_global_settings(struc
+ 	if (IS_CHAN_HALF_RATE(chan)) {
+ 		eifs = 175;
+ 
+-		if (!AR_SREV_9300_20_OR_LATER(ah))
++		if (!AR_SREV_9300_20_OR_LATER(ah)) {
+ 			rx_lat = 10;
+-		else
++			sifstime = 8;
++		} else {
+ 			rx_lat *= 2;
++			sifstime = 32;
++		}
+ 
+ 		tx_lat *= 2;
+ 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+ 			tx_lat += 11;
+ 
+ 		slottime = 13;
+-		sifstime = 32;
+ 	} else if (IS_CHAN_QUARTER_RATE(chan)) {
+ 		eifs = 340;
+ 
+-		if (!AR_SREV_9300_20_OR_LATER(ah))
++		if (!AR_SREV_9300_20_OR_LATER(ah)) {
+ 			rx_lat = 20;
+-		else
++			sifstime = 8;
++		} else {
+ 			rx_lat = (rx_lat * 4) - 1;
++			sifstime = 64;
++		}
+ 
+ 		tx_lat *= 4;
+ 		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
+ 		    tx_lat += 22;
+ 
+ 		slottime = 21;
+-		sifstime = 64;
+ 	} else {
+ 		if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) {
+ 			eifs = AR_D_GBL_IFS_EIFS_ASYNC_FIFO;