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comparison wbio/wbio.c @ 0:c34b37680055 default tip

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Inital commit of random SuperIO code.
author Daniel O'Connor <darius@dons.net.au>
date Thu, 20 Oct 2011 16:48:24 +1030
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-1:000000000000 0:c34b37680055
1 #include <stdio.h>
2 #include <errno.h>
3 #include <string.h>
4 #include <fcntl.h>
5 #include <stdlib.h>
6 #include <sys/types.h>
7 #include <machine/cpufunc.h>
8 #include <unistd.h>
9
10 void
11 usage(char *name) {
12 fprintf(stderr,
13 "Bad usage\n"
14 "\t%s [-b base] adr [data]\n"
15 "\n"
16 "Read/write registers in Winbond SuperIO parts\n"
17 "base is the base address for the chip (default: 0x290)\n"
18 "adr is the register to read/write\n"
19 "data is the data to write to adr\n", name);
20 exit(1);
21 }
22
23 int
24 main(int argc, char **argv) {
25 int fd, base, dev, adr, data, ch, type;
26 char *progname;
27
28 #define WB_ADR 0x5
29 #define WB_DATA 0x6
30
31 base = 0x290;
32
33 progname = argv[0];
34
35 while ((ch = getopt(argc, argv, "b:")) != -1) {
36 switch (ch) {
37 case 'b':
38 base = strtol(optarg, NULL, 0) & 0xffff;
39 break;
40
41 default:
42 usage(progname);
43 break;
44 }
45 }
46 argc -= optind;
47 argv += optind;
48
49 if (argc != 1 && argc != 2)
50 usage(progname);
51
52 if ((fd = open("/dev/io", O_RDWR)) == -1) {
53 fprintf(stderr, "Can't open /dev/io: %s\n", strerror(errno));
54 exit(1);
55 }
56
57 adr = strtol(argv[0], NULL, 0) & 0xff;
58
59 /* Register to access */
60 outb(base + WB_ADR, adr);
61
62 if (argc == 2) {
63 data = strtol(argv[1], NULL, 0) & 0xff;
64 printf("Base 0x%02x: 0x%02x <- 0x%02x\n", base, adr, data);
65 outb(base + WB_DATA, data);
66 } else
67 printf("Bank 0x%02x: 0x%02x -> 0x%02x\n", dev, adr, inb(base + WB_DATA));
68
69 exit(0);
70 }
71