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ath9k: Fix eifs/usec timeout for AR9287 v1.3+

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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@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-08-27 12:13:21 +05:30 committed by John W. Linville
parent e3f2acc76d
commit a7be039d34
2 changed files with 10 additions and 2 deletions
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10
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -997,8 +997,14 @@ 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);

2
drivers/net/wireless/ath/ath9k/reg.h
View File

@ -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