On Tue, 2010-04-27 at 02:02 +0300, Nicolas Barati wrote: > Hello, > I 'm using ath5k witha a TP-LINK PCI card. What I need is to sample > some Atheros registers and particularly AR_SLOT_TIME = 0x8010 for my > school project. First, I tried to read it whithin if_ath.c and printk > the result, but I get always 0. Then I tried ath_info. Same thing > there!
You are asking in the list for ath5k, but you are referring to the code in MadWifi. If you look for the equivalent of AR_SLOT_TIME in ath5k, you'll see that it's called AR5K_SLOT_TIME. By looking at the ath5k code, you can see that AR5K_SLOT_TIME is only used for AR5210, whereas newer chipsets use AR5K_DCU_GBL_IFS_SLOT. That probably explains why you are getting zero. > I saw a thread about a similar problem at > http://kerneltrap.org/mailarchive/linux-ath5k-devel/2010/4/20/6884576/thread. > Mr Roskin said that the right way to access hardware is from the kernel code. > And Mr Papillault suggested another way using a debugfs file called ". I guess you misquoted the later message :-) > I couldn' t understand how to use any of them. Please could anyone > (perhaps the aforementioned gentlemen) give some more details or > perhaps a walk-through to solve my problem? You didn't tell what the problem is and what you have tried so far. You may want to see this: http://catb.org/~esr/faqs/smart-questions.html#explicit I'm definitely not in the position to provide any walk-through. > P.S I need the value of this register to estimate the load on a > network based on Backoff window's value. In AR5210 there's a register > called AR_BACKOFF_CW wich - I guess - keeps this info, but not in > ar5212 chipsets! Instead there is the SLOT_TIME register which I > assume does the same job! Please tell me If I 'm wrong or any other > way to get the Backoff window's value. AR_BACKOFF_CW is not a register, AR_BACKOFF is, and it's called AR5K_BACKOFF in ath5k. You can see that it's never used on MadWifi or ath5k at all. -- Regards, Pavel Roskin _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
