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mac80211: fix ath5k dma size workaround for ar71xx

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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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17328 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2009-08-20 15:09:03 +00:00
parent 81ef7deaae
commit c787789db4
1 changed files with 10 additions and 4 deletions
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14
package/mac80211/patches/201-ath5k-WAR-for-AR71xx-PCI-bug.patch
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@ -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
@ -17,14 +21,16 @@
/* 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 },