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From: Adrian Chadd <adrian@FreeBSD.org>
Date: Sun, 3 Apr 2011 12:02:49 +0000 (UTC)
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Subject: svn commit: r220294 - head/sys/dev/ath/ath_hal/ar5416
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Author: adrian
Date: Sun Apr  3 12:02:49 2011
New Revision: 220294
URL: http://svn.freebsd.org/changeset/base/220294

Log:
  Import a fix from the ath9k - reduce the TX FIFO size for Kite (AR9285.)

Modified:
  head/sys/dev/ath/ath_hal/ar5416/ar5416_reset.c

Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416_reset.c
==============================================================================
--- head/sys/dev/ath/ath_hal/ar5416/ar5416_reset.c	Sun Apr  3 11:59:52 2011	(r220293)
+++ head/sys/dev/ath/ath_hal/ar5416/ar5416_reset.c	Sun Apr  3 12:02:49 2011	(r220294)
@@ -480,7 +480,15 @@ ar5416InitDMA(struct ath_hal *ah)
 	 * reduce the number of usable entries in PCU TXBUF to avoid
 	 * wrap around.
 	 */
-	OS_REG_WRITE(ah, AR_PCU_TXBUF_CTRL, AR_PCU_TXBUF_CTRL_USABLE_SIZE);
+	if (AR_SREV_KITE(ah))
+		/*
+		 * For AR9285 the number of Fifos are reduced to half.
+		 * So set the usable tx buf size also to half to
+		 * avoid data/delimiter underruns
+		 */
+		OS_REG_WRITE(ah, AR_PCU_TXBUF_CTRL, AR_9285_PCU_TXBUF_CTRL_USABLE_SIZE);
+	else
+		OS_REG_WRITE(ah, AR_PCU_TXBUF_CTRL, AR_PCU_TXBUF_CTRL_USABLE_SIZE);
 }
 
 static void