From: Sujith Manoharan <c_manoha@qualcomm.com>
To: <linville@tuxdriver.com>
Cc: <linux-wireless@vger.kernel.org>
Subject: [PATCH] ath9k: Fix chainmask selection for AR9462
Date: Wed, 26 Sep 2012 12:22:08 +0530 [thread overview]
Message-ID: <20578.42520.130884.616830@gargle.gargle.HOWL> (raw)
Force chain 1 to be used for CCK rates since the target power
table stored in EEPROM is too high to transmit with both chains.
This is needed to avoid regulatory violation.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath9k/ath9k.h | 2 ++
drivers/net/wireless/ath/ath9k/xmit.c | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 8e27f4f..dfe6a47 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -173,6 +173,8 @@ void ath_descdma_cleanup(struct ath_softc *sc, struct ath_descdma *dd,
#define ATH_AN_2_TID(_an, _tidno) (&(_an)->tid[(_tidno)])
+#define IS_CCK_RATE(rate) ((rate >= 0x18) && (rate <= 0x1e))
+
#define ATH_TX_COMPLETE_POLL_INT 1000
enum ATH_AGGR_STATUS {
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index b088fa0..36618e3 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1820,10 +1820,14 @@ u8 ath_txchainmask_reduction(struct ath_softc *sc, u8 chainmask, u32 rate)
{
struct ath_hw *ah = sc->sc_ah;
struct ath9k_channel *curchan = ah->curchan;
+
if ((ah->caps.hw_caps & ATH9K_HW_CAP_APM) &&
(curchan->channelFlags & CHANNEL_5GHZ) &&
(chainmask == 0x7) && (rate < 0x90))
return 0x3;
+ else if (AR_SREV_9462(ah) && ath9k_hw_btcoex_is_enabled(ah) &&
+ IS_CCK_RATE(rate))
+ return 0x2;
else
return chainmask;
}
--
1.7.12
reply other threads:[~2012-09-26 6:53 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20578.42520.130884.616830@gargle.gargle.HOWL \
--to=c_manoha@qualcomm.com \
--cc=linux-wireless@vger.kernel.org \
--cc=linville@tuxdriver.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox