Re: Fast channel switching

void ar5212SetChannel5112work2192(UINT32 freq)
{
/* Step 5 MHz */
           UINT32       ii,channelSelect;
volatile   UINT32 *hard_reg;

        channelSelect = ((freq - 672) * 2 - 3040)/10;
            channelSelect = (channelSelect << 2) & 0xff;
            channelSelect = ath_hal_reverseBits(channelSelect, 8);


        channelSelect = (channelSelect << 4) | 0x1005;

        hard_reg = (void*)0xB8510024; *hard_reg = 0x0;
        sysUDelayFlash (0x3E8);
        hard_reg = (void*)0xb851981c; *hard_reg = 0x0;
        sysUDelayFlash (0xA);
        hard_reg = (void*)0xb851989C; *hard_reg = (channelSelect & 0xff);

        channelSelect = (channelSelect >> 8) & 0x7f;
        hard_reg = (void*)0xb85198D8; *hard_reg = channelSelect;
        sysUDelayFlash (0xA);
        hard_reg = (void*)0xb851981c; *hard_reg = 0x1;
        sysUDelayFlash (0x64);
        hard_reg = (void*)0xb8519860;
        *hard_reg = *hard_reg |0x2;
        channelSelect = 0x2;
        for (ii=0; (ii< 0x3FFFE) && channelSelect ;ii++)channelSelect = *hard_reg & 0x2;

        hard_reg = (void*)0xB8510024; *hard_reg = 0x1;

}

-----Original Message-----
From: Vishal Sevani <[email protected]>
To: [email protected]
Date: Mon, 22 Feb 2010 14:10:04 +0530
Subject: Re: [Madwifi-users] Fast channel switching

> On Sat, Feb 20, 2010 at 5:00 AM, Pavel Roskin <[email protected]> wrote:
> 
> > On Fri, 2010-02-19 at 15:17 +0530, Vishal Sevani wrote:
> >
> > >         > I did apply the following patch
> > >         > https://madwifi-project.org/ticket/2322 , but to no avail.
> > >         Could you
> > >         > point out as to what the problem could be?? If you need me
> > >         to provide
> > >         > any other debug information please do let me know.
> > >
> > >
> > >         I'll appreciate if you post your results to the ticket.  So
> > >         far there
> > >         have been no test results for that patch at all.
> > >
> > > Yeah I have posted my experience in the following ticket.
> > > https://madwifi-project.org/ticket/2359
> >
> > I actually I meant that you would report a negative result with the
> > patch in #2322.  But it looks like the problems are different.
> >
> > Yeah it seems more of a hardware issue with AR71xx borad, (or issue with
> Openwrt) as pointed out by [email protected] in his comment following yours
> in the ticket #2359. If Iam correct, it is happening because the value in
> reg AR_ISR corresponding to flag AR_ISR_HIUERR is being set, which is for
> unexpected bus error. As mentioned in the following post
> http://n2.nabble.com/fatal-interrupt-td3225930.html, it is beacuse the
> following bit, AR_ISR_S2_MCABT  (for master cycle abort) is being set.
> 
> Iam clueless as to what could be causing this master cycle abort problem and
> how should I go about debugging it. Could you please provide any pointers as
> to how I can rectify this problem.
> 
> 
> > > Yesterday again I tried with latest release of Openwrt Kamikaze  ie.
> > > v8.09.2, but still I get the same problem. But the madwifi code works
> > > properly on IBM latop running Ubuntu with Linux kernel 2.6.24-23. So I
> > > guess it is the issue with Openwrt or the hardware ie. AR71xx boards.
> > > Has the latest code been tested on Openwrt and Ar71xx boards??
> >
> > I'm not aware of it.
> >
> > --
> > Regards,
> > Pavel Roskin
> >
> 
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