[coreboot] Coreboot on Tyan S2892
jordan at cosmicpenguin.net
Wed Nov 12 23:39:10 CET 2008
Peter Stuge wrote:
> Myles Watson wrote:
>>>> In case this turns out to be a dead end, what does porting a driver
>>>> to FILO involve?
>>> It depends on the requirements of the driver,
>> Storage. nvidia ck804 sata.
> Ugh. Probably painful. From linux/drivers/ata/sata_nv.c:
> * No hardware documentation available outside of NVIDIA.
> * This driver programs the NVIDIA SATA controller in a similar
> * fashion as with other PCI IDE BMDMA controllers, with a few
> * NV-specific details such as register offsets, SATA phy location,
> * hotplug info, etc.
> * CK804/MCP04 controllers support an alternate programming interface
> * similar to the ADMA specification (with some modifications).
> * This allows the use of NCQ. Non-DMA-mapped ATA commands are still
> * sent through the legacy interface.
> There's no DMA infrastructure in FILO or libpayload.
> But the second paragraph seems to imply that PIO through legacy
> interface should work.
Its easy enough to tell - if you look at the PCI device before it gets
switched into NCQ mode the PCI config space should be immediately
recognizable as a IDE part.
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