Add the pci_findvendor function

If compiled with PCI_VERBOSE, this function looks up a vendor string based
on a vendor id.  Otherwise, it returns NULL.
From NetBSD

2 files changed, 27 insertions, 2 deletions

diff --git a/sys/dev/pci/pci_subr.c b/sys/dev/pci/pci_subr.c
index b98b917d69a..e68a04aacf8 100644
--- a/sys/dev/pci/pci_subr.c
+++ b/sys/dev/pci/pci_subr.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pci_subr.c,v 1.12 2001/05/08 20:13:18 mickey Exp $	*/
+/*	$OpenBSD: pci_subr.c,v 1.13 2002/01/03 20:52:24 nate Exp $	*/
 /*	$NetBSD: pci_subr.c,v 1.19 1996/10/13 01:38:29 christos Exp $	*/
 
 /*
@@ -281,6 +281,25 @@ struct pci_known_product {
 #include <dev/pci/pcidevs_data.h>
 #endif /* PCIVERBOSE */
 
+const char *
+pci_findvendor(pcireg_t id_reg)
+{
+#ifdef PCIVERBOSE
+	pci_vendor_id_t vendor = PCI_VENDOR(id_reg);
+	const struct pci_known_vendor *kdp;
+
+	kdp = pci_known_vendors;
+        while (kdp->vendorname != NULL) {	/* all have vendor name */
+                if (kdp->vendor == vendor)
+                        break;
+		kdp++;
+	}
+        return (kdp->vendorname);
+#else
+	return (NULL);
+#endif
+}
+
 void
 pci_devinfo(id_reg, class_reg, showclass, cp)
 	pcireg_t id_reg, class_reg;
diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h
index 012210e6b27..7367b63991b 100644
--- a/sys/dev/pci/pcivar.h
+++ b/sys/dev/pci/pcivar.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pcivar.h,v 1.21 2001/08/19 05:17:37 art Exp $	*/
+/*	$OpenBSD: pcivar.h,v 1.22 2002/01/03 20:52:24 nate Exp $	*/
 /*	$NetBSD: pcivar.h,v 1.23 1997/06/06 23:48:05 thorpej Exp $	*/
 
 /*
@@ -189,4 +189,10 @@ void	pci_devinfo __P((pcireg_t, pcireg_t, int, char *));
 void	set_pci_isa_bridge_callback __P((void (*)(void *), void *));
 const struct pci_quirkdata *
 	pci_lookup_quirkdata __P((pci_vendor_id_t, pci_product_id_t));
+
+/*
+ * Misc.
+ */
+const char   *pci_findvendor __P((pcireg_t));
+
 #endif /* _DEV_PCI_PCIVAR_H_ */