mac80211: fix ath5k dma size workaround for ar71xx
authorFelix Fietkau <nbd@openwrt.org>
Thu, 20 Aug 2009 15:09:03 +0000 (15:09 +0000)
committerFelix Fietkau <nbd@openwrt.org>
Thu, 20 Aug 2009 15:09:03 +0000 (15:09 +0000)
Atheros legacy hardware does not perform well on ar71xx unless both TXCFG and RXCFG are forced to 4 bytes.
The previous patch only changed RXCFG. The OpenWrt Madwifi HAL also sets both RXCFG and TXCFG

SVN-Revision: 17328

package/mac80211/patches/201-ath5k-WAR-for-AR71xx-PCI-bug.patch

index b72c5bd..9223f4f 100644 (file)
@@ -1,14 +1,18 @@
 --- a/drivers/net/wireless/ath/ath5k/reset.c
 +++ b/drivers/net/wireless/ath/ath5k/reset.c
-@@ -1370,8 +1370,14 @@ int ath5k_hw_reset(struct ath5k_hw *ah, 
+@@ -1368,10 +1368,18 @@ int ath5k_hw_reset(struct ath5k_hw *ah, 
+        * guess we can tweak it and see how it goes ;-)
+        */
        if (ah->ah_version != AR5K_AR5210) {
++#ifndef CONFIG_ATHEROS_AR71XX
                AR5K_REG_WRITE_BITS(ah, AR5K_TXCFG,
                        AR5K_TXCFG_SDMAMR, AR5K_DMASIZE_128B);
-+#ifndef CONFIG_ATHEROS_AR71XX
                AR5K_REG_WRITE_BITS(ah, AR5K_RXCFG,
                        AR5K_RXCFG_SDMAMW, AR5K_DMASIZE_128B);
 +#else
 +              /* WAR for AR71xx PCI bug */
++              AR5K_REG_WRITE_BITS(ah, AR5K_TXCFG,
++                      AR5K_TXCFG_SDMAMR, AR5K_DMASIZE_4B);
 +              AR5K_REG_WRITE_BITS(ah, AR5K_RXCFG,
 +                      AR5K_RXCFG_SDMAMW, AR5K_DMASIZE_4B);
 +#endif
        /* Pre-enable interrupts on 5211/5212*/
 --- a/drivers/net/wireless/ath/ath5k/initvals.c
 +++ b/drivers/net/wireless/ath/ath5k/initvals.c
-@@ -59,7 +59,12 @@ static const struct ath5k_ini ar5210_ini
+@@ -58,8 +58,14 @@ static const struct ath5k_ini ar5210_ini
+       { AR5K_IMR,             0 },
        { AR5K_IER,             AR5K_IER_DISABLE },
        { AR5K_BSR,             0, AR5K_INI_READ },
-       { AR5K_TXCFG,           AR5K_DMASIZE_128B },
 +#ifndef CONFIG_ATHEROS_AR71XX
+       { AR5K_TXCFG,           AR5K_DMASIZE_128B },
        { AR5K_RXCFG,           AR5K_DMASIZE_128B },
 +#else
 +      /* WAR for AR71xx PCI bug */
++      { AR5K_TXCFG,           AR5K_DMASIZE_4B },
 +      { AR5K_RXCFG,           AR5K_DMASIZE_4B },
 +#endif
        { AR5K_CFG,             AR5K_INIT_CFG },