Re: disabling dma/new ide interface 2.6.18-rc4-mm1
From: Alan Cox
Date: Mon Aug 21 2006 - 12:01:11 EST
Ar Llu, 2006-08-21 am 15:27 +0100, ysgrifennodd Bahadir Balban:
> I am trying to implement a basic ide driver based on ata_generic.c.
> Its a pio-only device.
> How do I disable dma on the new interface? Changing ata_port_info fields?
ata_generic.c assumes the BIOS set up the timings and the device follows
PCI SFF. In those cases it already correctly handles PIO only
If you are trying to write a driver for a non PCI motherboard device (Eg
on an embedded board) then drivers/ata/pata_qdi.c may be a better
example to follow as it sets up all the device ports by hand as a
If you want PIO only then don't provide mwdma or udma mode masks in the
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