--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wbio/wbio.c	Thu Oct 20 16:48:24 2011 +1030
@@ -0,0 +1,71 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <machine/cpufunc.h>
+#include <unistd.h>
+
+void
+usage(char *name) {
+    fprintf(stderr,
+	    "Bad usage\n"
+	    "\t%s [-b base] adr [data]\n"
+	    "\n"
+	    "Read/write registers in Winbond SuperIO parts\n"
+	    "base is the base address for the chip (default: 0x290)\n"
+	    "adr is the register to read/write\n"
+	    "data is the data to write to adr\n", name);
+    exit(1);
+}
+
+int
+main(int argc, char **argv) {
+    int	fd, base, dev, adr, data, ch, type;
+    char *progname;
+    
+#define WB_ADR	0x5
+#define WB_DATA	0x6
+
+    base = 0x290;
+    
+    progname = argv[0];
+    
+    while ((ch = getopt(argc, argv, "b:")) != -1) {
+	switch (ch) {
+	    case 'b':
+		base = strtol(optarg, NULL, 0) & 0xffff;
+		break;
+		    
+	    default:
+		usage(progname);
+		break;
+	}
+    }
+    argc -= optind;
+    argv += optind;
+	
+    if (argc != 1 && argc != 2)
+	usage(progname);
+
+    if ((fd = open("/dev/io", O_RDWR)) == -1) {
+	fprintf(stderr, "Can't open /dev/io: %s\n", strerror(errno));
+	exit(1);
+    }
+
+    adr = strtol(argv[0], NULL, 0) & 0xff;
+
+    /* Register to access */
+    outb(base + WB_ADR, adr);
+    
+    if (argc == 2)	{
+	data = strtol(argv[1], NULL, 0) & 0xff;
+	printf("Base 0x%02x: 0x%02x <- 0x%02x\n", base, adr, data);
+	outb(base + WB_DATA, data);
+    } else
+	printf("Bank 0x%02x: 0x%02x -> 0x%02x\n", dev, adr, inb(base + WB_DATA));
+	
+    exit(0);
+}
+