diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/ar9002_hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9002_hw.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_hw.c b/drivers/net/wireless/ath/ath9k/ar9002_hw.c index 5b21e691438..cf36f646791 100644 --- a/drivers/net/wireless/ath/ath9k/ar9002_hw.c +++ b/drivers/net/wireless/ath/ath9k/ar9002_hw.c @@ -526,6 +526,35 @@ int ar9002_hw_rf_claim(struct ath_hw *ah) return 0; } +/* + * Enable ASYNC FIFO + * + * If Async FIFO is enabled, the following counters change as MAC now runs + * at 117 Mhz instead of 88/44MHz when async FIFO is disabled. + * + * The values below tested for ht40 2 chain. + * Overwrite the delay/timeouts initialized in process ini. + */ +void ar9002_hw_enable_async_fifo(struct ath_hw *ah) +{ + if (AR_SREV_9287_12_OR_LATER(ah)) { + REG_WRITE(ah, AR_D_GBL_IFS_SIFS, + AR_D_GBL_IFS_SIFS_ASYNC_FIFO_DUR); + REG_WRITE(ah, AR_D_GBL_IFS_SLOT, + AR_D_GBL_IFS_SLOT_ASYNC_FIFO_DUR); + REG_WRITE(ah, AR_D_GBL_IFS_EIFS, + AR_D_GBL_IFS_EIFS_ASYNC_FIFO_DUR); + + REG_WRITE(ah, AR_TIME_OUT, AR_TIME_OUT_ACK_CTS_ASYNC_FIFO_DUR); + REG_WRITE(ah, AR_USEC, AR_USEC_ASYNC_FIFO_DUR); + + REG_SET_BIT(ah, AR_MAC_PCU_LOGIC_ANALYZER, + AR_MAC_PCU_LOGIC_ANALYZER_DISBUG20768); + REG_RMW_FIELD(ah, AR_AHB_MODE, AR_AHB_CUSTOM_BURST_EN, + AR_AHB_CUSTOM_BURST_ASYNC_FIFO_VAL); + } +} + /* Sets up the AR5008/AR9001/AR9002 hardware familiy callbacks */ void ar9002_hw_attach_ops(struct ath_hw *ah) { |