IDE Driver on PPC Kernel 2.4.x fails in DMA mode.

[kvsukesh at yahoo.com]

Hi,
I am having some trouble getting the drivers
for the IDE/ATA 100 ( iam using cmd 649 & and an IBM
Deskstar )work in the DMA mode running kernel 2.4.2
on a PPC405GP.
If anybody has seen this problem, or has a fix for it
please respond.
I tried to enable the DMA using hdparam -d1 /dev/hda
but it fails.

thanks
SUKESH



Below is the boot up message log..
-----------------------------------
 CMD649: IDE controller on PCI bus 00 dev 18
> PCI: Enabling device 00:03.0 (0000 -> 0001)
> CMD649: chipset revision 2
> CMD649: not 100% native mode: will probe irqs later
> CMD649: simplex device:  DMA disabled
>     ide0: BM-DMA at 0x0060-0x0067, BIOS settings:
hda:pio, hdb:pio
>     ide1: BM-DMA at 0x0068-0x006f, BIOS settings:
hdc:pio, hdd:pio
> hda: probing with STATUS(0x50) instead of
ALTSTATUS(0xff)
> hda: IC35L040AVER07-0, ATA DISK drive
> hda: IRQ probe failed (0x0)
> hdb: probing with STATUS(0x00) instead of
ALTSTATUS(0xff)
> hdb: IRQ probe failed (0x0)
> hdb: probing with STATUS(0x00) instead of
ALTSTATUS(0xff)
> hdb: IRQ probe failed (0x0)
> ide: Assuming 33MHz system bus speed for PIO modes;
override with
idebus=xx
> ide0 at 0x040-0x047,0x246 on irq 30
> hda: 80418240 sectors (41174 MB) w/1916KiB Cache,
CHS=79780/16/63
> Partition check:
>  hda: unknown partition table


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