Hi all,
Is STBC not supported on any chipsets other than AR_SREV_9280_10_OR_LATER(ah)?
/Björn
On Sun, Apr 18, 2010 at 4:56 PM, Felix Fietkau <nbd@xxxxxxxxxxx> wrote:
> Supported only for single stream rates by the hardware
>
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
> ---
> drivers/net/wireless/ath/ath9k/init.c | 6 ++++++
> drivers/net/wireless/ath/ath9k/mac.h | 8 +++++++-
> drivers/net/wireless/ath/ath9k/xmit.c | 2 ++
> 3 files changed, 15 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
> index 2c0630e..8c79548 100644
> --- a/drivers/net/wireless/ath/ath9k/init.c
> +++ b/drivers/net/wireless/ath/ath9k/init.c
> @@ -216,6 +216,12 @@ static void setup_ht_cap(struct ath_softc *sc,
> else
> max_streams = 2;
>
> + if (AR_SREV_9280_10_OR_LATER(ah)) {
> + if (max_streams >= 2)
> + ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
> + ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
> + }
> +
> /* set up supported mcs set */
> memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
> tx_streams = count_streams(common->tx_chainmask, max_streams);
> diff --git a/drivers/net/wireless/ath/ath9k/mac.h b/drivers/net/wireless/ath/ath9k/mac.h
> index 66d0d5e..00f3e0c 100644
> --- a/drivers/net/wireless/ath/ath9k/mac.h
> +++ b/drivers/net/wireless/ath/ath9k/mac.h
> @@ -37,6 +37,8 @@
> AR_2040_##_index : 0) \
> |((_series)[_index].RateFlags & ATH9K_RATESERIES_HALFGI ? \
> AR_GI##_index : 0) \
> + |((_series)[_index].RateFlags & ATH9K_RATESERIES_STBC ? \
> + AR_STBC##_index : 0) \
> |SM((_series)[_index].ChSel, AR_ChainSel##_index))
>
> #define CCK_SIFS_TIME 10
> @@ -434,7 +436,10 @@ struct ar5416_desc {
> #define AR_ChainSel3_S 17
> #define AR_RTSCTSRate 0x0ff00000
> #define AR_RTSCTSRate_S 20
> -#define AR_TxCtlRsvd70 0xf0000000
> +#define AR_STBC0 0x10000000
> +#define AR_STBC1 0x20000000
> +#define AR_STBC2 0x40000000
> +#define AR_STBC3 0x80000000
>
> #define AR_TxRSSIAnt00 0x000000ff
> #define AR_TxRSSIAnt00_S 0
> @@ -647,6 +652,7 @@ enum ath9k_rx_filter {
> #define ATH9K_RATESERIES_RTS_CTS 0x0001
> #define ATH9K_RATESERIES_2040 0x0002
> #define ATH9K_RATESERIES_HALFGI 0x0004
> +#define ATH9K_RATESERIES_STBC 0x0008
>
> struct ath9k_11n_rate_series {
> u32 Tries;
> diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
> index 2237658..b0d345a 100644
> --- a/drivers/net/wireless/ath/ath9k/xmit.c
> +++ b/drivers/net/wireless/ath/ath9k/xmit.c
> @@ -1607,6 +1607,8 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf)
> series[i].Rate = rix | 0x80;
> series[i].PktDuration = ath_pkt_duration(sc, rix, bf,
> is_40, is_sgi, is_sp);
> + if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
> + series[i].RateFlags |= ATH9K_RATESERIES_STBC;
> continue;
> }
>
> --
> 1.6.4.2
>
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