Rene Herman wrote:
Okay, thought I'd stare at this thing a bit -- there's no specific 1888 documentation available it seems but I did notice something in the 1878 datasheet which might mean something. The docs says that bits 0-1 are don't care for DMA but don't for IRQ, so could it possibly be as simple as the attached?
1878 sheet doesn't document register 0x7f, it seems...
Assuming it's not just this, this thing is going to require quite a bit of trial and error and without the hardware this will be troublesome. I expect this is not it, since the arch init code also doesn't care about bit 0 when setting that same register for IRQ 5.
If this is not it -- I'd try s/0x50/0x10/ in that line, even completely commenting out the IRQ setting line (with the arch code built in) and just generally frolic around 'till something blows up...
(es18xx_trial_and_error)
As distributed, no change: still not seeing any activity on IRQ 5. I'll play around with it some over the next day or so.
Observed: the alsa "snd-sb8" driver works fine. Question: how does IRQ setup differ between the sb8 and the es18xx drivers? If I can find some time, I'll try to figure that out...