1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2013 Sebastian Herbszt - All Rights Reserved
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
8 * Boston MA 02110-1301, USA; either version 2 of the License, or
9 * (at your option) any later version; incorporated herein by reference.
10 *
11 * ----------------------------------------------------------------------- */
12
13 /*
14 * poweroff.c
15 *
16 * APM poweroff module
17 */
18
19 #include <stdio.h>
20 #include <string.h>
21 #include <com32.h>
22
main(int argc __unused,char * argv[]__unused)23 int main(int argc __unused, char *argv[] __unused)
24 {
25 com32sys_t inregs, outregs;
26
27 memset(&inregs, 0, sizeof inregs);
28
29 inregs.eax.l = 0x5300; /* APM Installation Check (00h) */
30 inregs.ebx.l = 0; /* APM BIOS (0000h) */
31 __intcall(0x15, &inregs, &outregs);
32
33 if (outregs.eflags.l & EFLAGS_CF) {
34 printf("APM not present.\n");
35 return 1;
36 }
37
38 if ((outregs.ebx.l & 0xffff) != 0x504d) { /* signature 'PM' */
39 printf("APM not present.\n");
40 return 1;
41 }
42
43 if ((outregs.eax.l & 0xffff) < 0x101) { /* Need version 1.1+ */
44 printf("APM 1.1+ not supported.\n");
45 return 1;
46 }
47
48 if ((outregs.ecx.l & 0x8) == 0x8) { /* bit 3 APM BIOS Power Management disabled */
49 printf("Power management disabled.\n");
50 return 1;
51 }
52
53 memset(&inregs, 0, sizeof inregs);
54 inregs.eax.l = 0x5301; /* APM Real Mode Interface Connect (01h) */
55 inregs.ebx.l = 0; /* APM BIOS (0000h) */
56 __intcall(0x15, &inregs, &outregs);
57
58 if (outregs.eflags.l & EFLAGS_CF) {
59 printf("APM RM interface connect failed.\n");
60 return 1;
61 }
62
63 memset(&inregs, 0, sizeof inregs);
64 inregs.eax.l = 0x530e; /* APM Driver Version (0Eh) */
65 inregs.ebx.l = 0; /* APM BIOS (0000h) */
66 inregs.ecx.l = 0x101; /* APM Driver version 1.1 */
67 __intcall(0x15, &inregs, &outregs);
68
69 if (outregs.eflags.l & EFLAGS_CF) {
70 printf("APM 1.1+ not supported.\n");
71 return 1;
72 }
73
74 if ((outregs.ecx.l & 0xffff) < 0x101) { /* APM Connection version */
75 printf("APM 1.1+ not supported.\n");
76 return 1;
77 }
78
79 memset(&inregs, 0, sizeof inregs);
80 inregs.eax.l = 0x5307; /* Set Power State (07h) */
81 inregs.ebx.l = 1; /* All devices power managed by the APM BIOS */
82 inregs.ecx.l = 3; /* Power state off */
83 __intcall(0x15, &inregs, &outregs);
84
85 if (outregs.eflags.l & EFLAGS_CF) {
86 printf("Power off failed.\n");
87 return 1;
88 }
89
90 return 0;
91 }
92