Add support for CS5535 IDE adapted from the gcscide code in NetBSD

originally written by Juan Romero Pardines.

Thanks to Lars Kotthoff for testing on a HeroLogic HL-463 system.

Because the CS5535 doesn't provide SMM emulated PCI access to set
DMA/PIO modes or a real PCI IDE controller we have to resort to
making MSR calls.  As this is very MD specific, hide most of uglyness
away in i386 MD pciide code.

ok grange@

2 files changed, 16 insertions, 2 deletions

diff --git a/sys/dev/pci/pciide.c b/sys/dev/pci/pciide.c
index e03135a53b0..2e2acf4a134 100644
--- a/sys/dev/pci/pciide.c
+++ b/sys/dev/pci/pciide.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pciide.c,v 1.291 2009/01/04 10:22:01 jsg Exp $	*/
+/*	$OpenBSD: pciide.c,v 1.292 2009/01/04 10:37:40 jsg Exp $	*/
 /*	$NetBSD: pciide.c,v 1.127 2001/08/03 01:31:08 tsutsui Exp $	*/
 
 /*
@@ -671,7 +671,17 @@ const struct pciide_product_desc pciide_sis_products[] =  {
 	}
 };
 
+/*
+ * The National/AMD CS5535 requires MSRs to set DMA/PIO modes so it
+ * has been banished to the MD i386 pciide_machdep
+ */
 const struct pciide_product_desc pciide_natsemi_products[] =  {
+#ifdef __i386__
+	{ PCI_PRODUCT_NS_CS5535_IDE,	/* National/AMD CS5535 IDE */
+	  0,
+	  gcsc_chip_map
+	},
+#endif
 	{ PCI_PRODUCT_NS_PC87415,	/* National Semi PC87415 IDE */
 	  0,
 	  natsemi_chip_map
diff --git a/sys/dev/pci/pciidevar.h b/sys/dev/pci/pciidevar.h
index c957ba9db2d..fb7d3591388 100644
--- a/sys/dev/pci/pciidevar.h
+++ b/sys/dev/pci/pciidevar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pciidevar.h,v 1.17 2009/01/04 10:22:01 jsg Exp $	*/
+/*	$OpenBSD: pciidevar.h,v 1.18 2009/01/04 10:37:40 jsg Exp $	*/
 /*	$NetBSD: pciidevar.h,v 1.6 2001/01/12 16:04:00 bouyer Exp $	*/
 
 /*
@@ -161,6 +161,10 @@ void	 pciide_print_channels(int, pcireg_t);
  * Functions defined by machine-dependent code.
  */
 
+#ifdef __i386__
+void gcsc_chip_map(struct pciide_softc *, struct pci_attach_args *);
+#endif
+
 /* Attach compat interrupt handler, returning handle or NULL if failed. */
 #if !defined(pciide_machdep_compat_intr_establish)
 void	*pciide_machdep_compat_intr_establish(struct device *,