Patch for Promise PDC20276

Hi there,

The patch that Arne Brutschy posted here (see
http://www.cs.helsinki.fi/linux/linux-kernel/2003-22/0386.html) almost saved my life as it allowed me to understand why my 2.4.22 kernel didn't activate my Promise PDC20276 IDE controller properly.

(For the record, my kernel was displaying the following message at boot:
PDC20276: neither IDE port enabled (BIOS)
)

But this patch was only halfway satisfactory, as it enabled only one of my 2 controller channels.

So I did a quick-and-dirty hack that gives the following patch, that allows activation of both channels of my PDC20276.

This might help others encountering the same problem...

========== CUT HERE ==========

ide/setup-pci.c renamed from ide/setup-pci.c.orig +4 -4

@@ -577,7 +577,7 @@
 	ata_index_t index;
 	u8 tmp = 0;
 	ide_hwif_t *hwif, *mate = NULL;
-	static int secondpdc = 0;
+/* MiB	static int secondpdc = 0; */
 
 	index.all = 0xf0f0;
 

@@ -637,10 +637,10 @@
 		 * by the bios for raid purposes.
 		 * Skip the normal "is it enabled" test for those.
 		 */
-		if (((d->vendor == PCI_VENDOR_ID_PROMISE) &&
+		if ((d->vendor == PCI_VENDOR_ID_PROMISE) &&
 		     ((d->device == PCI_DEVICE_ID_PROMISE_20262) ||
-		      (d->device == PCI_DEVICE_ID_PROMISE_20265))) &&
-		    (secondpdc++==1) && (port==1))
+		      (d->device == PCI_DEVICE_ID_PROMISE_20265) ||
+		      (d->device == PCI_DEVICE_ID_PROMISE_20276)))
 			goto controller_ok;
 
 		if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||

========== CUT HERE ==========

Regards

This was discussed few times before.
Just enable "Special FastTrak feature" (overriding BIOS) config option.

Quoted 2 lines · Bartlomiej Zolnierkiewicz

This was discussed few times before.
Just enable "Special FastTrak feature" (overriding BIOS) config option.

Uh. I may have misunderstood, but I understood that using this option would activate the controller's hardware RAID feature, which I don't want.

I need to use the controller as a normal, non-RAID, IDE controller (and if ever if was setup as hardware RAID, I'm afraid it would destroy my data..)

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Uh. I may have misunderstood, but I understood that using this option would activate the controller's hardware RAID feature, which I don't want.

Quite opposite, it makes Linux use controller even if it was marked by BIOS as disabled (for RAID purposes).

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