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Teach if_ath about devices which have short-GI in 20MHz channel modes.

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This has been disabled until now because there hasn't been any supported
device which has this feature. Since the AR9287 is the first device to
support it, and since now the HAL has functional AR9287+11n support,
flip this on.
This commit is contained in:
Adrian Chadd 2011-05-29 00:17:13 +00:00
parent 66e2bfe830
commit 76355edba5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=222432
2 changed files with 18 additions and 4 deletions
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5
sys/dev/ath/ath_hal/ar9002/ar9287_attach.c
View File

@ -439,9 +439,14 @@ ar9287FillCapabilityInfo(struct ath_hal *ah)
/* Disable this so Block-ACK works correctly */
pCap->halHasRxSelfLinkedTail = AH_FALSE;
pCap->halPSPollBroken = AH_FALSE;
/* Hardware supports (at least) single-stream STBC TX/RX */
pCap->halRxStbcSupport = 1;
pCap->halTxStbcSupport = 1;
/* Hardware supports short-GI w/ 20MHz */
pCap->halHTSGI20Support = 1;
return AH_TRUE;
}

17
sys/dev/ath/if_ath.c
View File

@ -627,13 +627,22 @@ ath_attach(u_int16_t devid, struct ath_softc *sc)
| IEEE80211_HTC_AMPDU /* A-MPDU tx/rx */
| IEEE80211_HTC_AMSDU /* A-MSDU tx/rx */
| IEEE80211_HTCAP_MAXAMSDU_3839 /* max A-MSDU length */
/* At the present time, the hardware doesn't support short-GI in 20mhz mode */
#if 0
| IEEE80211_HTCAP_SHORTGI20 /* short GI in 20MHz */
#endif
| IEEE80211_HTCAP_SMPS_OFF; /* SM power save off */
;
/*
* Enable short-GI for HT20 only if the hardware
* advertises support.
* Notably, anything earlier than the AR9287 doesn't.
*/
if ((ath_hal_getcapability(ah,
HAL_CAP_HT20_SGI, 0, NULL) == HAL_OK) &&
(wmodes & HAL_MODE_HT20)) {
device_printf(sc->sc_dev,
"[HT] enabling short-GI in 20MHz mode\n");
ic->ic_htcaps |= IEEE80211_HTCAP_SHORTGI20;
}
if (wmodes & HAL_MODE_HT40)
ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40
| IEEE80211_HTCAP_SHORTGI40;