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authorFelix Fietkau <nbd@openwrt.org>2011-07-19 06:42:26 +0000
committerFelix Fietkau <nbd@openwrt.org>2011-07-19 06:42:26 +0000
commit80ae98d6048606293dbf2734ad3bcf711e051a6f (patch)
tree334f141242bf93b901dfb6c32011cb1b6f127193
parent6b8c119b4149a531ed25f83c4f89dd47e038cd26 (diff)
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ath9k: validate eeprom chainmask settings, some Ubiquiti devices (and maybe others) contain bogus data, which breaks wifi
SVN-Revision: 27688
-rw-r--r--package/mac80211/patches/580-ath9k_fixup_chainmask.patch51
1 files changed, 51 insertions, 0 deletions
diff --git a/package/mac80211/patches/580-ath9k_fixup_chainmask.patch b/package/mac80211/patches/580-ath9k_fixup_chainmask.patch
new file mode 100644
index 0000000..07e78d3
--- /dev/null
+++ b/package/mac80211/patches/580-ath9k_fixup_chainmask.patch
@@ -0,0 +1,51 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -2007,12 +2007,22 @@ EXPORT_SYMBOL(ath9k_hw_set_sta_beacon_ti
+ /* HW Capabilities */
+ /*******************/
+
++static u8 fixup_chainmask(u8 chip_chainmask, u8 eeprom_chainmask)
++{
++ eeprom_chainmask &= chip_chainmask;
++ if (eeprom_chainmask)
++ return eeprom_chainmask;
++ else
++ return chip_chainmask;
++}
++
+ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
+ {
+ struct ath9k_hw_capabilities *pCap = &ah->caps;
+ struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
++ unsigned int chip_chainmask;
+
+ u16 eeval;
+ u8 ant_div_ctl1, tx_chainmask, rx_chainmask;
+@@ -2049,6 +2059,15 @@ int ath9k_hw_fill_cap_info(struct ath_hw
+ if (eeval & AR5416_OPFLAGS_11G)
+ pCap->hw_caps |= ATH9K_HW_CAP_2GHZ;
+
++ if (AR_SREV_9485(ah) || AR_SREV_9285(ah) || AR_SREV_9330(ah))
++ chip_chainmask = 1;
++ else if (!AR_SREV_9280_20_OR_LATER(ah))
++ chip_chainmask = 7;
++ else if (!AR_SREV_9300_20_OR_LATER(ah) || AR_SREV_9340(ah))
++ chip_chainmask = 3;
++ else
++ chip_chainmask = 7;
++
+ pCap->tx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_TX_MASK);
+ /*
+ * For AR9271 we will temporarilly uses the rx chainmax as read from
+@@ -2065,6 +2084,9 @@ int ath9k_hw_fill_cap_info(struct ath_hw
+ /* Use rx_chainmask from EEPROM. */
+ pCap->rx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_RX_MASK);
+
++ pCap->tx_chainmask = fixup_chainmask(chip_chainmask, pCap->tx_chainmask);
++ pCap->rx_chainmask = fixup_chainmask(chip_chainmask, pCap->rx_chainmask);
++
+ ah->misc_mode |= AR_PCU_MIC_NEW_LOC_ENA;
+
+ /* enable key search for every frame in an aggregate */