wireless driver ath9k and module 80211 interaction

wireless driver ath9k and module 80211 interaction

[Roshanak Rasoli]

Hi experts,

I have a question about the code  that you wrote;

1- How does the ath9k announce itself to the mac80211?
2- How can the mac80211 know how to configure the ath9k.

Could you please point out to the code.

Thanks in advance.

Re: wireless driver ath9k and module 80211 interaction

[Dan Williams]

On Fri, 2015-04-17 at 18:01 +0200, Roshanak Rasoli wrote:
> Hi experts,
> 
> I have a question about the code  that you wrote;
> 
> 1- How does the ath9k announce itself to the mac80211?

The ath9k driver handles its own hardware detection via normal kernel
probing and matching mechanisms, and you end up in
drivers/net/wireless/ath/ath9k/pci.c::ath_pci_probe() or ath_ahb_probe()
depending on the bus the device uses.  From there ath9k calls
ieee80211_alloc_hw() which is how ath9k "announces" itself to mac80211.

> 2- How can the mac80211 know how to configure the ath9k.

The hardware module (ath9k) sends a set of "ops" (struct ieee80211_ops)
to mac80211 in the ieee80211_alloc_hw() call that contains callbacks
that mac80211 will run when it needs to configure the device.  See
drivers/net/wireless/ath/ath9k/main.c for the ath9k_ops structure.

Dan

> Could you please point out to the code.
> 
> Thanks in advance.
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