For AR9287 v1.3+ chips, MAC runs at 117MHz. But the initvals
IFS parameters are loaded based on 44/88MHz clockrate. So
eifs/usec from ini should not be used for AR9287 v1.3+.
The mentioned values are tested on 2 chain HT40 mode.
Signed-off-by: Rajkumar Manoharan <rmanohar@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hw.c | 10 ++++++++--
drivers/net/wireless/ath/ath9k/reg.h | 2 ++
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 05472c5..284d2a4 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1000,8 +1000,14 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah)
slottime = 21;
sifstime = 64;
} else {
- eifs = REG_READ(ah, AR_D_GBL_IFS_EIFS)/common->clockrate;
- reg = REG_READ(ah, AR_USEC);
+ if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) {
+ eifs = AR_D_GBL_IFS_EIFS_ASYNC_FIFO;
+ reg = AR_USEC_ASYNC_FIFO;
+ } else {
+ eifs = REG_READ(ah, AR_D_GBL_IFS_EIFS)/
+ common->clockrate;
+ reg = REG_READ(ah, AR_USEC);
+ }
rx_lat = MS(reg, AR_USEC_RX_LAT);
tx_lat = MS(reg, AR_USEC_TX_LAT);
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index a3b8bbc..17a272f 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -619,6 +619,7 @@
#define AR_D_GBL_IFS_EIFS 0x10b0
#define AR_D_GBL_IFS_EIFS_M 0x0000FFFF
#define AR_D_GBL_IFS_EIFS_RESV0 0xFFFF0000
+#define AR_D_GBL_IFS_EIFS_ASYNC_FIFO 363
#define AR_D_GBL_IFS_MISC 0x10f0
#define AR_D_GBL_IFS_MISC_LFSR_SLICE_SEL 0x00000007
@@ -1503,6 +1504,7 @@ enum {
#define AR_USEC_TX_LAT_S 14
#define AR_USEC_RX_LAT 0x1F800000
#define AR_USEC_RX_LAT_S 23
+#define AR_USEC_ASYNC_FIFO 0x12E00074
#define AR_RESET_TSF 0x8020
#define AR_RESET_TSF_ONCE 0x01000000
--
1.7.6.1
--
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