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