diff options
| author | Damien Bergamini <damien@cvs.openbsd.org> | 2010-12-31 21:23:56 +0000 |
|---|---|---|
| committer | Damien Bergamini <damien@cvs.openbsd.org> | 2010-12-31 21:23:56 +0000 |
| commit | 0b6d62f095cb4dece152a6de03a65095436aed03 (patch) | |
| tree | c718432dd18de647218e092767c3a7ab40e83d7d /sys/dev/ic/ar9380.c | |
| parent | 72bc7ae677c0c13cc45512ec2a960a2c71227142 (diff) | |
limit the number of Tx chains used on some 3-stream AR9380 chips
for MCS0~15 to not exceed the PCIe power requirements.
Diffstat (limited to 'sys/dev/ic/ar9380.c')
| -rw-r--r-- | sys/dev/ic/ar9380.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/dev/ic/ar9380.c b/sys/dev/ic/ar9380.c index 6e50027417a..f025e3eb1a6 100644 --- a/sys/dev/ic/ar9380.c +++ b/sys/dev/ic/ar9380.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ar9380.c,v 1.8 2010/12/31 14:06:05 damien Exp $ */ +/* $OpenBSD: ar9380.c,v 1.9 2010/12/31 21:23:55 damien Exp $ */ /*- * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr> @@ -19,7 +19,7 @@ /* * Driver for Atheros 802.11a/g/n chipsets. - * Routines for AR9380 and AR9381 chipsets. + * Routines for AR9380 and AR9485 chipsets. */ #include "bpfilter.h" @@ -158,6 +158,13 @@ ar9380_setup(struct athn_softc *sc) /* Enable PA predistortion if supported. */ if (base->featureEnable & AR_EEP_PAPRD) sc->flags |= ATHN_FLAG_PAPRD; + /* + * Some 3-stream chips may exceed the PCIe power requirements, + * requiring to reduce the number of Tx chains in some cases. + */ + if ((base->miscConfiguration & AR_EEP_CHAIN_MASK_REDUCE) && + sc->txchainmask == 0x7) + sc->flags |= ATHN_FLAG_3TREDUCE_CHAIN; /* Select initialization values based on ROM. */ type = MS(eep->baseEepHeader.txrxgain, AR_EEP_RX_GAIN); |