ath9k: add more fixes for half/quarter rate support

SVN-Revision: 27562

1 files changed, 91 insertions, 0 deletions

diff --git a/package/mac80211/patches/545-ath9k_timing_settings.patch b/package/mac80211/patches/545-ath9k_timing_settings.patch
new file mode 100644
index 0000000..90a575a
--- /dev/null
+++ b/package/mac80211/patches/545-ath9k_timing_settings.patch
@@ -0,0 +1,91 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -951,25 +951,60 @@ static bool ath9k_hw_set_global_txtimeou
+ 
+ void ath9k_hw_init_global_settings(struct ath_hw *ah)
+ {
+-	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
++	struct ath_common *common = ath9k_hw_common(ah);
++	struct ieee80211_conf *conf = &common->hw->conf;
++	const struct ath9k_channel *chan = ah->curchan;
+ 	int acktimeout;
+ 	int slottime;
+ 	int sifstime;
++	int rx_lat = 0, tx_lat = 0, eifs = 0;
++	u32 reg;
+ 
+ 	ath_dbg(ath9k_hw_common(ah), ATH_DBG_RESET, "ah->misc_mode 0x%x\n",
+ 		ah->misc_mode);
+ 
++	if (!chan)
++		return;
++
+ 	if (ah->misc_mode != 0)
+ 		REG_SET_BIT(ah, AR_PCU_MISC, ah->misc_mode);
+ 
+-	if (conf->channel && conf->channel->band == IEEE80211_BAND_5GHZ)
+-		sifstime = 16;
+-	else
+-		sifstime = 10;
++	rx_lat = 37;
++	tx_lat = 54;
++
++	if (IS_CHAN_HALF_RATE(chan)) {
++		eifs = 175;
++		rx_lat *= 2;
++		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;
++		rx_lat *= 4;
++		tx_lat *= 4;
++		if (IS_CHAN_A_FAST_CLOCK(ah, chan))
++		    tx_lat += 22;
++
++		slottime = 21;
++		sifstime = 64;
++	} else {
++		eifs = REG_READ(ah, AR_D_GBL_IFS_EIFS);
++		reg = REG_READ(ah, AR_USEC);
++		rx_lat = MS(reg, AR_USEC_RX_LAT);
++		tx_lat = MS(reg, AR_USEC_TX_LAT);
++
++		slottime = ah->slottime;
++		if (IS_CHAN_5GHZ(chan))
++			sifstime = 16;
++		else
++			sifstime = 10;
++	}
+ 
+ 	/* As defined by IEEE 802.11-2007 17.3.8.6 */
+-	slottime = ah->slottime + 3 * ah->coverage_class;
+-	acktimeout = slottime + sifstime;
++	acktimeout = slottime + sifstime + 3 * ah->coverage_class;
+ 
+ 	/*
+ 	 * Workaround for early ACK timeouts, add an offset to match the
+@@ -981,11 +1016,19 @@ void ath9k_hw_init_global_settings(struc
+ 	if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
+ 		acktimeout += 64 - sifstime - ah->slottime;
+ 
+-	ath9k_hw_setslottime(ah, ah->slottime);
++	ath9k_hw_setslottime(ah, slottime);
+ 	ath9k_hw_set_ack_timeout(ah, acktimeout);
+ 	ath9k_hw_set_cts_timeout(ah, acktimeout);
+ 	if (ah->globaltxtimeout != (u32) -1)
+ 		ath9k_hw_set_global_txtimeout(ah, ah->globaltxtimeout);
++
++	REG_WRITE(ah, AR_D_GBL_IFS_EIFS, ath9k_hw_mac_to_clks(ah, eifs));
++	REG_RMW(ah, AR_USEC,
++		(common->clockrate - 1) |
++		SM(rx_lat, AR_USEC_RX_LAT) |
++		SM(tx_lat, AR_USEC_TX_LAT),
++		AR_USEC_TX_LAT | AR_USEC_RX_LAT | AR_USEC_USEC);
++
+ }
+ EXPORT_SYMBOL(ath9k_hw_init_global_settings);
+