Some devices (e.g. Ubiquiti AirRouter) ship with broken EEPROM chainmask
data, which breaks the initial calibration after a hardware reset.
To fix this, mask the eeprom chainmask with the chainmask of the chip,
and use the chip chainmask if the result is zero.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hw.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 2a5f908..8006ce0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1997,12 +1997,22 @@ EXPORT_SYMBOL(ath9k_hw_set_sta_beacon_timers);
/* 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;
@@ -2039,6 +2049,15 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
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
@@ -2055,6 +2074,9 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
/* 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 */
--
1.7.3.2
--
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