> > First thing I noticed: the reported "Link Signal Level"
> > from iwconfig was way off. It showed values around
> > -170 dBm when it was sitting directly beside the AP.
> > It was easy to fix:
> >
> > - rx_status.ssi = (flags2 >> 8) & 0x7F;
> > + rx_status.ssi = (flags2 >> 8) & 0xFF;
> >
> > According to the 8180 datasheet, this field is 8 bit.
> >
> Ugh. The diagram (in the 8185 datasheet) shows that the rssi field is 7 bits
> long while the table after it says 8 bits, and the two figures disagree on a
> few other fields too. I'll fix that up..
>
True, the datasheet is not consistent.
However the last reference code I have from Realtek is
signal=((*(priv->rxringtail+1))& (0xff0000))>>16;
signal=(signal&0xfe)>>1; // Modify by hikaru 6.6
<snip>
if(!rtl8180_IsWirelessBMode(stats.rate) )
{ // OFDM rate.
if(signal>90)
signal=90;
else if(signal<25)
signal=25;
signal = (90-signal)*100/65;
}else{ // CCK rate.
if(signal>95)
signal = 95;
else if(signal<30)
signal = 30;
signal =(95-signal )*100/65;
}
priv->wstats.qual.level = signal;
Similar to rtl8187 this look at AGC, not RSSI, field to extract signal
strength information.
Andrea
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