107 lines
2.8 KiB
Diff
107 lines
2.8 KiB
Diff
--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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@@ -914,6 +914,13 @@ static void ath9k_hw_init_interrupt_mask
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}
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}
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+static void ath9k_hw_set_sifs_time(struct ath_hw *ah, u32 us)
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+{
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+ u32 val = ath9k_hw_mac_to_clks(ah, us - 2);
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+ val = min(val, (u32) 0xFFFF);
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+ REG_WRITE(ah, AR_D_GBL_IFS_SIFS, val);
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+}
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+
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static void ath9k_hw_setslottime(struct ath_hw *ah, u32 us)
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{
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u32 val = ath9k_hw_mac_to_clks(ah, us);
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@@ -951,25 +958,60 @@ static bool ath9k_hw_set_global_txtimeou
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void ath9k_hw_init_global_settings(struct ath_hw *ah)
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{
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- struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
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+ struct ath_common *common = ath9k_hw_common(ah);
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+ struct ieee80211_conf *conf = &common->hw->conf;
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+ const struct ath9k_channel *chan = ah->curchan;
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int acktimeout;
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int slottime;
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int sifstime;
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+ int rx_lat = 0, tx_lat = 0, eifs = 0;
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+ u32 reg;
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ath_dbg(ath9k_hw_common(ah), ATH_DBG_RESET, "ah->misc_mode 0x%x\n",
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ah->misc_mode);
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+ if (!chan)
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+ return;
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+
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if (ah->misc_mode != 0)
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REG_SET_BIT(ah, AR_PCU_MISC, ah->misc_mode);
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- if (conf->channel && conf->channel->band == IEEE80211_BAND_5GHZ)
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- sifstime = 16;
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- else
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- sifstime = 10;
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+ rx_lat = 37;
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+ tx_lat = 54;
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+
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+ if (IS_CHAN_HALF_RATE(chan)) {
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+ eifs = 175;
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+ rx_lat *= 2;
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+ tx_lat *= 2;
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+ if (IS_CHAN_A_FAST_CLOCK(ah, chan))
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+ tx_lat += 11;
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+
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+ slottime = 13;
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+ sifstime = 32;
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+ } else if (IS_CHAN_QUARTER_RATE(chan)) {
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+ eifs = 340;
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+ rx_lat *= 4;
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+ tx_lat *= 4;
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+ if (IS_CHAN_A_FAST_CLOCK(ah, chan))
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+ tx_lat += 22;
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+
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+ slottime = 21;
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+ sifstime = 64;
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+ } else {
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+ eifs = REG_READ(ah, AR_D_GBL_IFS_EIFS);
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+ reg = REG_READ(ah, AR_USEC);
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+ rx_lat = MS(reg, AR_USEC_RX_LAT);
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+ tx_lat = MS(reg, AR_USEC_TX_LAT);
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+
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+ slottime = ah->slottime;
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+ if (IS_CHAN_5GHZ(chan))
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+ sifstime = 16;
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+ else
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+ sifstime = 10;
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+ }
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/* As defined by IEEE 802.11-2007 17.3.8.6 */
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- slottime = ah->slottime + 3 * ah->coverage_class;
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- acktimeout = slottime + sifstime;
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+ acktimeout = slottime + sifstime + 3 * ah->coverage_class;
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/*
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* Workaround for early ACK timeouts, add an offset to match the
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@@ -981,11 +1023,20 @@ void ath9k_hw_init_global_settings(struc
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if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
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acktimeout += 64 - sifstime - ah->slottime;
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- ath9k_hw_setslottime(ah, ah->slottime);
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+ ath9k_hw_set_sifs_time(ah, sifstime);
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+ ath9k_hw_setslottime(ah, slottime);
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ath9k_hw_set_ack_timeout(ah, acktimeout);
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ath9k_hw_set_cts_timeout(ah, acktimeout);
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if (ah->globaltxtimeout != (u32) -1)
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ath9k_hw_set_global_txtimeout(ah, ah->globaltxtimeout);
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+
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+ REG_WRITE(ah, AR_D_GBL_IFS_EIFS, ath9k_hw_mac_to_clks(ah, eifs));
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+ REG_RMW(ah, AR_USEC,
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+ (common->clockrate - 1) |
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+ SM(rx_lat, AR_USEC_RX_LAT) |
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+ SM(tx_lat, AR_USEC_TX_LAT),
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+ AR_USEC_TX_LAT | AR_USEC_RX_LAT | AR_USEC_USEC);
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+
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}
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EXPORT_SYMBOL(ath9k_hw_init_global_settings);
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