From 80987be514eb74e84fe7bc91f5333a1cf7b2b914 Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@cvs.openbsd.org>
Date: Fri, 15 May 2009 21:51:59 +0000
Subject: On the Intel 82801BAM Hub-to-PCI, pass the main PCI io and mmio
 extents if there are no windows enabled.  Restores CardBus functionality on
 some machines with Intel chipsets.

---
 sys/dev/pci/ppb.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'sys/dev/pci/ppb.c')

diff --git a/sys/dev/pci/ppb.c b/sys/dev/pci/ppb.c
index d5e066b43e0..6b9b39c2606 100644
--- a/sys/dev/pci/ppb.c
+++ b/sys/dev/pci/ppb.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ppb.c,v 1.32 2009/05/05 14:16:17 kettenis Exp $	*/
+/*	$OpenBSD: ppb.c,v 1.33 2009/05/15 21:51:58 kettenis Exp $	*/
 /*	$NetBSD: ppb.c,v 1.16 1997/06/06 23:48:05 thorpej Exp $	*/
 
 /*
@@ -227,6 +227,19 @@ ppbattach(struct device *parent, struct device *self, void *aux)
 		}
 	}
 
+	/*
+	 * The Intel 82801BAM Hub-to-PCI can decode subtractively.
+	 * XXX We probably should handle subtractive decode bridges
+	 * in general.
+	 */
+	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_INTEL &&
+	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_82801BAM_HPB) {
+		if (sc->sc_ioex == NULL)
+			sc->sc_ioex = pa->pa_ioex;
+		if (sc->sc_memex == NULL)
+			sc->sc_memex = pa->pa_memex;
+	}
+
  attach:
 	/*
 	 * Attach the PCI bus that hangs off of it.
-- 
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