On Tue, Jul 19, 2011 at 3:08 PM, Adrian Chadd <adrian@xxxxxxxxxxx> wrote:
> can someone just verify what the rcChainMask value is in the eeprom header?
'0' in the AR9382(may be the eeprom in this card may not support it),
it does not seems to be used anywhere. is it something like 'rate
control mask?'
>
>
>
> adrian
>
>
> On 19 July 2011 14:46, Felix Fietkau <nbd@xxxxxxxxxxx> wrote:
>> 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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--
shafi
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