Re: [parisc-linux] Re: 2.6.4-rc1-pa3 siimage/NS87415 IDE progess (and another mystery)!

[Randolph Chung <randolph@tausq.org>]

> don't have an IDE drive to try it with, but if it works, shouldn't it be
> done as a pcibios fixup instead? We already have a fixup routine in
> drivers/parisc/superio.c:superio_fixup_pci(), so you can probably just
> add it there.

i.e. (the progif write was removed since it's redundant):

Index: drivers/parisc/superio.c
===================================================================
RCS file: /var/cvs/linux-2.6/drivers/parisc/superio.c,v
retrieving revision 1.9
diff -u -p -r1.9 superio.c
--- drivers/parisc/superio.c	18 May 2004 13:08:56 -0000	1.9
+++ drivers/parisc/superio.c	11 Jul 2004 23:33:06 -0000
@@ -482,6 +482,16 @@ void superio_fixup_pci(struct pci_dev *p
 	pci_write_config_byte(pdev, PCI_CLASS_PROG, pdev->class);
 
 	pci_read_config_byte(pdev, PCI_CLASS_PROG, &prog);
+
+	/* IODC clobbers the CTRL registers with:
+	 * CTRL1 = 0xf0 = "ATAPI buffer mode (no prefetching)" for everyone
+	 * CTRL2 = 0x03 = mask chan1/2 interrupts
+	 * CTRL3 = 0x00 = "disable prefetch buffer"/"Master Wait States"
+	 */
+	pci_write_config_byte(pdev, 0x40, 0xf0); /* IDE_CTRL1 */
+	pci_write_config_byte(pdev, 0x41, 0x00); /* IDE_CTRL2 */
+	pci_write_config_byte(pdev, 0x42, 0x00); /* IDE_CTRL3 */
+
 	printk("PCI: Enabled native mode for NS87415 (pif=0x%x)\n", prog);
 }
 

works fine on my c3750 with a cdrom drive too! Great job Grant :)

randolph
-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/

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