diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index ec2a7a40..5879c73 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -84,6 +84,38 @@ static u32 ath9k_hw_mac_to_clks(struct ath_hw *ah, u32 usecs) return ath9k_hw_mac_clks(ah, usecs); } +/* + * Read and write, they both share the same lock. We do this to serialize + * reads and writes on Atheros 802.11n PCI devices only. This is required + * as the FIFO on these devices can only accept sanely 2 requests. After + * that the device goes bananas. Serializing the reads/writes prevents this + * from happening. + */ + +void ath9k_iowrite32(struct ath_hw *ah, u32 reg_offset, u32 val) +{ + if (ah->config.serialize_regmode == SER_REG_MODE_ON) { + unsigned long flags; + spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags); + iowrite32(val, ah->ah_sc->mem + reg_offset); + spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags); + } else + iowrite32(val, ah->ah_sc->mem + reg_offset); +} + +unsigned int ath9k_ioread32(struct ath_hw *ah, u32 reg_offset) +{ + u32 val; + if (ah->config.serialize_regmode == SER_REG_MODE_ON) { + unsigned long flags; + spin_lock_irqsave(&ah->ah_sc->sc_serial_rw, flags); + val = ioread32(ah->ah_sc->mem + reg_offset); + spin_unlock_irqrestore(&ah->ah_sc->sc_serial_rw, flags); + } else + val = ioread32(ah->ah_sc->mem + reg_offset); + return val; +} + bool ath9k_hw_wait(struct ath_hw *ah, u32 reg, u32 mask, u32 val, u32 timeout) { int i; @@ -136,7 +168,7 @@ bool ath9k_get_channel_edges(struct ath_hw *ah, } u16 ath9k_hw_computetxtime(struct ath_hw *ah, - struct ath_rate_table *rates, + const struct ath_rate_table *rates, u32 frameLen, u16 rateix, bool shortPreamble) { @@ -1313,8 +1345,7 @@ static int ath9k_hw_process_ini(struct ath_hw *ah, if (AR_SREV_9280(ah)) REG_WRITE_ARRAY(&ah->iniModesRxGain, modesIndex, regWrites); - if (AR_SREV_9280(ah) || (AR_SREV_9285(ah) && - AR_SREV_9285_12_OR_LATER(ah))) + if (AR_SREV_9280(ah) || AR_SREV_9285_12_OR_LATER(ah)) REG_WRITE_ARRAY(&ah->iniModesTxGain, modesIndex, regWrites); for (i = 0; i < ah->iniCommon.ia_rows; i++) { |