Anton Vorontsov wrote:
1. IDE status read does not work. (But am I understand correctly
that IDE works well if IRQ is unspecified? Then this is hardly
an issue.)
2. IDE interrupt comes when it should not. I'd recommend to use
oscilloscope to find out what is happening there, that is, if
the drive actually deasserts its irq line after status read.
If so, than this could be a PIC problem.
What is the platform on which you're observing the issue, btw?
Another possibility is that you got the wrong interrupt number
in the device-tree...
Ben.
The platform is the AMCC Sequoia board. We've built a little adapter to
connect a compact flash card to the processor bus. I believe the
interrupt selection in the device tree is correct, and I've checked over
the u-boot settings for the IRQ line (active high, level sensitive).
IDE IRQs are active-low.
Only on the PCI and only in the native mode. Natively, the IDE INTRQ
signal is active-high, rising edge triggering, as on ISA. You seem to have an
invertor somewhere, if it's not a PCI chip...
WBR, Sergei
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