From 9711f50e204c6e918a983e9dbfa864fd006acb01 Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Wed, 13 Apr 2005 12:01:44 +0000
Subject: Created separate isa_ids.h file and a utility function to print out
 ISA IDs in a human-readable format.

---
 src/drivers/bus/isa_ids.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/drivers/bus/isa_ids.c

(limited to 'src/drivers/bus')

diff --git a/src/drivers/bus/isa_ids.c b/src/drivers/bus/isa_ids.c
new file mode 100644
index 000000000..f7be1129c
--- /dev/null
+++ b/src/drivers/bus/isa_ids.c
@@ -0,0 +1,24 @@
+#include "etherboot.h"
+#include "isa_ids.h"
+
+/* 
+ * EISA and ISAPnP IDs are actually mildly human readable, though in a
+ * somewhat brain-damaged way.
+ *
+ */
+char * isa_id_string ( uint16_t vendor, uint16_t product ) {
+	static unsigned char buf[7];
+	int i;
+
+	/* Vendor ID is a compressed ASCII string */
+	vendor = htons ( vendor );
+	for ( i = 2 ; i >= 0 ; i-- ) {
+		buf[i] = ( 'A' - 1 + ( vendor & 0x1f ) );
+		vendor >>= 5;
+	}
+	
+	/* Product ID is a 4-digit hex string */
+	sprintf ( &buf[3], "%hx", htons ( product ) );
+
+	return buf;
+}
-- 
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