diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index cd0f023ccf77..6b37036b2d36 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -184,7 +184,8 @@ u16 ath9k_hw_computetxtime(struct ath_hw *ah, break; case WLAN_RC_PHY_OFDM: if (ah->curchan && IS_CHAN_QUARTER_RATE(ah->curchan)) { - bitsPerSymbol = (kbps * OFDM_SYMBOL_TIME_QUARTER) / 1000; + bitsPerSymbol = + ((kbps >> 2) * OFDM_SYMBOL_TIME_QUARTER) / 1000; numBits = OFDM_PLCP_BITS + (frameLen << 3); numSymbols = DIV_ROUND_UP(numBits, bitsPerSymbol); txTime = OFDM_SIFS_TIME_QUARTER @@ -192,7 +193,8 @@ u16 ath9k_hw_computetxtime(struct ath_hw *ah, + (numSymbols * OFDM_SYMBOL_TIME_QUARTER); } else if (ah->curchan && IS_CHAN_HALF_RATE(ah->curchan)) { - bitsPerSymbol = (kbps * OFDM_SYMBOL_TIME_HALF) / 1000; + bitsPerSymbol = + ((kbps >> 1) * OFDM_SYMBOL_TIME_HALF) / 1000; numBits = OFDM_PLCP_BITS + (frameLen << 3); numSymbols = DIV_ROUND_UP(numBits, bitsPerSymbol); txTime = OFDM_SIFS_TIME_HALF + @@ -1036,7 +1038,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) int acktimeout, ctstimeout, ack_offset = 0; int slottime; int sifstime; - int rx_lat = 0, tx_lat = 0, eifs = 0; + int rx_lat = 0, tx_lat = 0, eifs = 0, ack_shift = 0; u32 reg; ath_dbg(ath9k_hw_common(ah), RESET, "ah->misc_mode 0x%x\n", @@ -1068,6 +1070,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) sifstime = 32; ack_offset = 16; + ack_shift = 3; slottime = 13; } else if (IS_CHAN_QUARTER_RATE(chan)) { eifs = 340; @@ -1078,6 +1081,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) sifstime = 64; ack_offset = 32; + ack_shift = 1; slottime = 21; } else { if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) { @@ -1134,6 +1138,10 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) SM(tx_lat, AR_USEC_TX_LAT), AR_USEC_TX_LAT | AR_USEC_RX_LAT | AR_USEC_USEC); + if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) + REG_RMW(ah, AR_TXSIFS, + sifstime | SM(ack_shift, AR_TXSIFS_ACK_SHIFT), + (AR_TXSIFS_TIME | AR_TXSIFS_ACK_SHIFT)); } EXPORT_SYMBOL(ath9k_hw_init_global_settings); |