From 86c986f190ec8ef44d4007b9fb581e626dc29dc5 Mon Sep 17 00:00:00 2001
From: Oleksij Rempel <linux@rempel-privat.de>
Date: Fri, 24 May 2013 20:30:59 +0200
Subject: [PATCH] ath9k: check for Rx-STBC flag and pass it to ieee80211
This patch make use of STBC flag in DMA RX descriptor.
Only devices after ar9280 can provide this information.
If card support it we will set HAVE_STBC flag, to show
clint programm thet STBC is supported but not received.
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/init.c | 10 ++++++++--
drivers/net/wireless/ath/ath9k/mac.c | 5 +++++
drivers/net/wireless/ath/ath9k/mac.h | 3 ++-
3 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index c7b888f227030..0536d442b0682 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -21,6 +21,7 @@
#include <linux/ath9k_platform.h>
#include <linux/module.h>
#include <linux/relay.h>
+#include <net/ieee80211_radiotap.h>
#include "ath9k.h"
@@ -766,8 +767,13 @@ void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
IEEE80211_HW_REPORTS_TX_ACK_STATUS |
IEEE80211_HW_SUPPORTS_RC_TABLE;
- if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
- hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
+ if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
+ hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
+
+ if (AR_SREV_9280_20_OR_LATER(ah))
+ hw->radiotap_mcs_details |=
+ IEEE80211_RADIOTAP_MCS_HAVE_STBC;
+ }
if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || ath9k_modparam_nohwcrypt)
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index a52081d73befd..d055e389abfc8 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -593,6 +593,11 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
(ads.ds_rxstatus3 & AR_GI) ? RX_FLAG_SHORT_GI : 0;
rs->flag |=
(ads.ds_rxstatus3 & AR_2040) ? RX_FLAG_40MHZ : 0;
+ if (AR_SREV_9280_20_OR_LATER(ah))
+ rs->flag |=
+ (ads.ds_rxstatus3 & AR_STBC) ?
+ /* we can only Nss=1 STBC */
+ (1 << RX_FLAG_STBC_SHIFT) : 0;
if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
diff --git a/drivers/net/wireless/ath/ath9k/mac.h b/drivers/net/wireless/ath/ath9k/mac.h
index 3f1e7754a1a76..b02dfce964b4d 100644
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -534,7 +534,8 @@ struct ar5416_desc {
#define AR_2040 0x00000002
#define AR_Parallel40 0x00000004
#define AR_Parallel40_S 2
-#define AR_RxStatusRsvd30 0x000000f8
+#define AR_STBC 0x00000008 /* on ar9280 and later */
+#define AR_RxStatusRsvd30 0x000000f0
#define AR_RxAntenna 0xffffff00
#define AR_RxAntenna_S 8
--
2.39.5