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From: | BALATON Zoltan |
Subject: | Re: [PATCH 2/2] via-ide: Also emulate non 100% native mode |
Date: | Sun, 1 Mar 2020 19:53:53 +0100 (CET) |
User-agent: | Alpine 2.22 (BSF 395 2020-01-19) |
On Sun, 1 Mar 2020, BALATON Zoltan wrote:
is not legacy mode but "not 100% native mode". The prog-if is set to 0x8a which corresponds to native mode but this is what the Linux fixup function does, firmware sets it to 0x8f which means native mode.
I mean, 0x8a legacy mode and 0x8f native mode, I see firmware poking 0x8f and Amiga like OSes reading that yet expecting legacy interrupts. Linux fixes up prog-if so its driver detects legacy interrupts but still uses ioports from PCI BARs.
Regards, BALATON Zoltan
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