Return-path: Received: from mail.neratec.com ([46.140.151.2]:1151 "EHLO mail.neratec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750829AbeBTOmH (ORCPT ); Tue, 20 Feb 2018 09:42:07 -0500 From: Wojciech Dubowik To: linux-wireless@vger.kernel.org Cc: kvalo@codeaurora.org, ath9k-devel@qca.qualcomm.com, Wojciech Dubowik Subject: [PATCH 2/2] ath9k: Fix ack SIFS time for quarter/half channels Date: Tue, 20 Feb 2018 15:42:00 +0100 Message-Id: <1519137720-9129-1-git-send-email-Wojciech.Dubowik@neratec.com> (sfid-20180220_154210_984633_C51C4B19) Sender: linux-wireless-owner@vger.kernel.org List-ID: Ack timing generation has to be adapted for 5/10 MHz channels. Do it by properly initializing ack shift field in TXSIFS register. Ack shift assumes channel width of 2.5 Hhz so value zero means 2.5 MHz, 1 is 5 MHz and so on. Signed-off-by: Wojciech Dubowik --- drivers/net/wireless/ath/ath9k/hw.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 3017078..6b37036 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -1038,7 +1038,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) int acktimeout, ctstimeout, ack_offset = 0; int slottime; int sifstime; - int rx_lat = 0, tx_lat = 0, eifs = 0; + int rx_lat = 0, tx_lat = 0, eifs = 0, ack_shift = 0; u32 reg; ath_dbg(ath9k_hw_common(ah), RESET, "ah->misc_mode 0x%x\n", @@ -1070,6 +1070,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) sifstime = 32; ack_offset = 16; + ack_shift = 3; slottime = 13; } else if (IS_CHAN_QUARTER_RATE(chan)) { eifs = 340; @@ -1080,6 +1081,7 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) sifstime = 64; ack_offset = 32; + ack_shift = 1; slottime = 21; } else { if (AR_SREV_9287(ah) && AR_SREV_9287_13_OR_LATER(ah)) { @@ -1136,6 +1138,10 @@ void ath9k_hw_init_global_settings(struct ath_hw *ah) SM(tx_lat, AR_USEC_TX_LAT), AR_USEC_TX_LAT | AR_USEC_RX_LAT | AR_USEC_USEC); + if (IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan)) + REG_RMW(ah, AR_TXSIFS, + sifstime | SM(ack_shift, AR_TXSIFS_ACK_SHIFT), + (AR_TXSIFS_TIME | AR_TXSIFS_ACK_SHIFT)); } EXPORT_SYMBOL(ath9k_hw_init_global_settings); -- 2.7.4