ide driver 2.4.21-rc6

Using the Promise 20276 IDE controller without raid function doesn't work with 2.4.21*.

If you want to use the IDE controller just as plain controller without Promise software raid (i.e. if you prefer to trust the linux software raid), the kernel always reports this:

PDC20276: IDE controller at PCI slot 02:02.0
PDC20276: chipset revision 1
PDC20276: not 100% native mode: will probe irqs later
PDC20276: neither IDE port enabled (BIOS)

Afterwards, the kernel disables the controller. This has been reported by serveral other users. This small patch solves the problem.

Arne

@@ -640,7 +640,8 @@
                 */
                if (((d->vendor == PCI_VENDOR_ID_PROMISE) &&
                     ((d->device == PCI_DEVICE_ID_PROMISE_20262) ||
-                     (d->device == PCI_DEVICE_ID_PROMISE_20265))) &&
+                     (d->device == PCI_DEVICE_ID_PROMISE_20265) ||
+                     (d->device == PCI_DEVICE_ID_PROMISE_20276))) &&
                    (secondpdc++==1) && (port==1))
                        goto controller_ok;
 

What about turning on "Special FastTrak Feature" instead... --
Bartlomiej

Bartlomiej Zolnierkiewicz wrote:
BZ> What about turning on "Special FastTrak Feature" instead... Didn't work for me, don't know why.

Arne

It MUST work.

Clean your kernel source with 'make mrproper' (just in case) and compile again with Special FastTrak Feature enabled (CONFIG_PDC202XX_FORCE=y).

If it really won't work contact me.
--
Bartlomiej

Hi,

as I promised, I'm back at home and investigated the problem with the CONFIG_PDC202XX_FORCE setting further.

The special cas with my setup is, that I have an ICH4 onboard, an PDC20276 onboard and an PCI SCSI controller. The root filesystem is on the SCSI disks. I can not boot from the SCSI disks directly, as the BIOS enables the PDC first. So I have to boot from the IDE disks connected to the PDC. This didn't work, so I replaced the simple Promise RAID bios with an normal UDMA bios thats allows you to use the controller as normal IDE controller. The result is, I can boot from the IDE disks and I can use the IDE disks as normal disks (used it in times the CONFIG_PDC202XX_FORCE wasn't in the linux kernel).

I do not know if the PDC 20276 is being sold with such a normal bios. I think so, as there are serveral users reporting the same error.

The problem is, that the driver thinks the bios/drives didn't get enabled by the bios end disables the whole controller. I patched the driver to skip this step. I still have to use the CONFIG_PDC202XX_FORCE setting- without it the second channel gets disabled.

This is the reason for my patch. I'm not sure, but I this it shouldn't be a problem for the driver...

Regards,
Arne

PS: please write me if you see any problems related to that patch

Bartlomiej Zolnierkiewicz wrote:
BZ> It MUST work.

BZ> Clean your kernel source with 'make mrproper' (just in case) and compile BZ> again with Special FastTrak Feature enabled (CONFIG_PDC202XX_FORCE=y).

BZ> If it really won't work contact me.
BZ> --
BZ> Bartlomiej