[ath9k-devel] ath9k driver failure requiring power cycle?

[ath9k-devel] ath9k driver failure requiring power cycle?

[Daniel Weinlader]

I am planning on using an SR-71E (AR9280) radio with the ath9k driver in 
an embedded device and was wondering if I might encounter a failure mode 
that requires power cycling the radio? Has anyone ever encountered a 
such failure that a reboot just would not fix?

I can programmatically bring the interface down and back up again, and 
even reboot the machine, but power cycling it would be a bit more 
problematic. But I would rather find out now if it is required, than 
when it is in the field.

Regards,

Dan

[ath9k-devel] ath9k driver failure requiring power cycle?

[Adrian Chadd]

I've not come across it before. But you could in theory do a complete
chip reset? Or even put the chip completely to sleep (MAC + BB +
radio) and wake it up?

What do others think?


Adrian

On 6 May 2011 19:01, Daniel Weinlader <dan@weinlader.org> wrote:
> I am planning on using an SR-71E (AR9280) radio with the ath9k driver in
> an embedded device and was wondering if I might encounter a failure mode
> that requires power cycling the radio? Has anyone ever encountered a
> such failure that a reboot just would not fix?
>
> I can programmatically bring the interface down and back up again, and
> even reboot the machine, but power cycling it would be a bit more
> problematic. But I would rather find out now if it is required, than
> when it is in the field.
>
> Regards,
>
> Dan
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>

[ath9k-devel] ath9k driver failure requiring power cycle?

[Daniel Weinlader]

On 5/6/2011 10:49 AM, Adrian Chadd wrote:
> I've not come across it before. But you could in theory do a complete
> chip reset? Or even put the chip completely to sleep (MAC + BB +
> radio) and wake it up?
>
> What do others think?

Thanks for the response Adrian. Can a full chip reset be done from user 
land?

Regards,

Dan

>
>
> Adrian
>
> On 6 May 2011 19:01, Daniel Weinlader<dan@weinlader.org>  wrote:
>> I am planning on using an SR-71E (AR9280) radio with the ath9k driver in
>> an embedded device and was wondering if I might encounter a failure mode
>> that requires power cycling the radio? Has anyone ever encountered a
>> such failure that a reboot just would not fix?
>>
>> I can programmatically bring the interface down and back up again, and
>> even reboot the machine, but power cycling it would be a bit more
>> problematic. But I would rather find out now if it is required, than
>> when it is in the field.
>>
>> Regards,
>>
>> Dan
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>

[ath9k-devel] ath9k driver failure requiring power cycle?

[Mohammed Shafi]

On Fri, May 6, 2011 at 9:33 PM, Daniel Weinlader <dan@weinlader.org> wrote:
> On 5/6/2011 10:49 AM, Adrian Chadd wrote:
>> I've not come across it before. But you could in theory do a complete
>> chip reset? Or even put the chip completely to sleep (MAC + BB +
>> radio) and wake it up?
>>
>> What do others think?
>
> Thanks for the response Adrian. Can a full chip reset be done from user
> land?

AFAIK i dont think its possible(is there are some reset switch?)  but
in the driver code please look for this functions in hw.c
int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
                   struct ath9k_hw_cal_data *caldata, bool bChannelChange)
static bool ath9k_hw_chip_reset(struct ath_hw *ah,
                                struct ath9k_channel *chan)

'ath9k_hw_reset' calls 'ath9k_hw_chip_reset'

>
> Regards,
>
> Dan
>
>>
>>
>> Adrian
>>
>> On 6 May 2011 19:01, Daniel Weinlader<dan@weinlader.org> ?wrote:
>>> I am planning on using an SR-71E (AR9280) radio with the ath9k driver in
>>> an embedded device and was wondering if I might encounter a failure mode
>>> that requires power cycling the radio? Has anyone ever encountered a
>>> such failure that a reboot just would not fix?
>>>
>>> I can programmatically bring the interface down and back up again, and
>>> even reboot the machine, but power cycling it would be a bit more
>>> problematic. But I would rather find out now if it is required, than
>>> when it is in the field.
>>>
>>> Regards,
>>>
>>> Dan
>>> _______________________________________________
>>> ath9k-devel mailing list
>>> ath9k-devel at lists.ath9k.org
>>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>>
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>