diff options
Diffstat (limited to 'package/kernel/mac80211/patches/314-ath9k-Use-tsf-offset-helper-in-ath9k_hw_reset.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/314-ath9k-Use-tsf-offset-helper-in-ath9k_hw_reset.patch | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/314-ath9k-Use-tsf-offset-helper-in-ath9k_hw_reset.patch b/package/kernel/mac80211/patches/314-ath9k-Use-tsf-offset-helper-in-ath9k_hw_reset.patch new file mode 100644 index 0000000000..e725a8bd60 --- /dev/null +++ b/package/kernel/mac80211/patches/314-ath9k-Use-tsf-offset-helper-in-ath9k_hw_reset.patch @@ -0,0 +1,65 @@ +From: Benjamin Berg <benjamin.berg@open-mesh.com> +Date: Mon, 4 Jul 2016 14:37:22 +0200 +Subject: [PATCH] ath9k: Use tsf offset helper in ath9k_hw_reset + +These changes make ath9k_hw_reset more consistent with other places that +handle the TSF value by using the same helper routine. + +A slight improvement is to not assume that a fixed time of 1.5ms has +passed for the initval writes when compared to the first write attempt. +Instead the TSF value is re-calculated which will yield a higher accuracy +of the restored TSF timer. + +Signed-off-by: Benjamin Berg <benjamin.berg@open-mesh.com> +--- + +--- a/drivers/net/wireless/ath/ath9k/hw.c ++++ b/drivers/net/wireless/ath/ath9k/hw.c +@@ -1832,8 +1832,9 @@ int ath9k_hw_reset(struct ath_hw *ah, st + u32 saveLedState; + u32 saveDefAntenna; + u32 macStaId1; ++ struct timespec tsf_ts; ++ u32 tsf_offset; + u64 tsf = 0; +- s64 usec = 0; + int r; + bool start_mci_reset = false; + bool save_fullsleep = ah->chip_fullsleep; +@@ -1877,8 +1878,8 @@ int ath9k_hw_reset(struct ath_hw *ah, st + macStaId1 = REG_READ(ah, AR_STA_ID1) & AR_STA_ID1_BASE_RATE_11B; + + /* Save TSF before chip reset, a cold reset clears it */ ++ getrawmonotonic(&tsf_ts); + tsf = ath9k_hw_gettsf64(ah); +- usec = ktime_to_us(ktime_get_raw()); + + saveLedState = REG_READ(ah, AR_CFG_LED) & + (AR_CFG_LED_ASSOC_CTL | AR_CFG_LED_MODE_SEL | +@@ -1911,8 +1912,8 @@ int ath9k_hw_reset(struct ath_hw *ah, st + } + + /* Restore TSF */ +- usec = ktime_to_us(ktime_get_raw()) - usec; +- ath9k_hw_settsf64(ah, tsf + usec); ++ tsf_offset = ath9k_hw_get_tsf_offset(&tsf_ts, NULL); ++ ath9k_hw_settsf64(ah, tsf + tsf_offset); + + if (AR_SREV_9280_20_OR_LATER(ah)) + REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, AR_GPIO_JTAG_DISABLE); +@@ -1932,12 +1933,11 @@ int ath9k_hw_reset(struct ath_hw *ah, st + /* + * Some AR91xx SoC devices frequently fail to accept TSF writes + * right after the chip reset. When that happens, write a new +- * value after the initvals have been applied, with an offset +- * based on measured time difference ++ * value after the initvals have been applied. + */ + if (AR_SREV_9100(ah) && (ath9k_hw_gettsf64(ah) < tsf)) { +- tsf += 1500; +- ath9k_hw_settsf64(ah, tsf); ++ tsf_offset = ath9k_hw_get_tsf_offset(&tsf_ts, NULL); ++ ath9k_hw_settsf64(ah, tsf + tsf_offset); + } + + ath9k_hw_init_mfp(ah); |