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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*
26: * Copyright 1994 NeXT Computer, Inc.
27: * All rights reserved.
28: */
29:
30: #import <mach/mach_types.h>
31: #import <kern/power.h>
32: #import <kern/thread_call.h>
33:
34: /*
35: * Power Management (PM) callout function.
36: */
37:
38: #define CYCLE_TIME ((tvalspec_t) { 1, 10000000 } ) /* 1.01 seconds */
39:
40: static PMPowerState systemState;
41:
42: static PMReturn
43: get_power_event(PMPowerEvent *ev_p)
44: {
45: PMPowerEvent event;
46: PMReturn ret;
47:
48: if ((ret = PMGetPowerEvent(&event)) == PM_R_SUCCESS) {
49: switch (event) {
50: case PM_STANDBY_REQUEST:
51: case PM_USER_STANDBY_REQUEST:
52: systemState = PM_STANDBY;
53: PMSetPowerState(PM_SYSTEM_DEVICE, PM_STANDBY);
54: break;
55: case PM_CRITICAL_SUSPEND:
56: case PM_SUSPEND_REQUEST:
57: case PM_USER_SUSPEND_REQUEST:
58: systemState = PM_SUSPENDED;
59: PMSetPowerState(PM_SYSTEM_DEVICE, PM_SUSPENDED);
60: systemState = PM_READY;
61: PMSetPowerState(PM_SYSTEM_DEVICE, PM_READY);
62: break;
63: case PM_NORMAL_RESUME:
64: case PM_CRITICAL_RESUME:
65: case PM_STANDBY_RESUME:
66: if (systemState != PM_READY) {
67: systemState = PM_READY;
68: PMSetPowerState(PM_SYSTEM_DEVICE, PM_READY);
69: }
70: /* fall through to update time */
71: case PM_UPDATE_TIME:
72: /* Must read time from RTC */
73: PMUpdateClock();
74: break;
75: case PM_BATTERY_LOW:
76: case PM_POWER_STATUS_CHANGE:
77: break;
78: }
79: if (ev_p)
80: *ev_p = event;
81: }
82: return ret;
83: }
84:
85: void
86: power_callout(
87: thread_call_spec_t argument,
88: thread_call_t callout
89: )
90: {
91: PMPowerEvent event;
92:
93: get_power_event(0);
94: if (callout == 0)
95: callout = thread_call_allocate(power_callout, 0);
96:
97: thread_call_enter_delayed(callout, deadline_from_interval(CYCLE_TIME));
98: }
99:
100: void
101: power_init()
102: {
103: kern_return_t result;
104: static boolean_t initialized = FALSE;
105:
106: if (initialized == FALSE) {
107: if (PMConnect() == PM_R_SUCCESS)
108: (void) power_callout(0, 0);
109:
110: systemState = PM_READY;
111: initialized = TRUE;
112: }
113: }
114:
115:
116: /*
117: * Kernel server side of power management MIG interface.
118: */
119:
120: kern_return_t
121: kern_PMSetPowerState(
122: host_t host,
123: PMDeviceID device,
124: PMPowerState state
125: )
126: {
127: if (host != &realhost)
128: return KERN_INVALID_HOST;
129:
130: return PMSetPowerState(device, state);
131: }
132:
133: kern_return_t
134: kern_PMGetPowerEvent(
135: host_t host,
136: PMPowerEvent *event
137: )
138: {
139: if (host != &realhost)
140: return KERN_INVALID_HOST;
141:
142: return get_power_event(event);
143: }
144:
145: kern_return_t
146: kern_PMGetPowerStatus(
147: host_t host,
148: PMPowerStatus *status
149: )
150: {
151: if (host != &realhost)
152: return KERN_INVALID_HOST;
153:
154: return PMGetPowerStatus(status);
155: }
156:
157: kern_return_t
158: kern_PMSetPowerManagement(
159: host_t host,
160: PMDeviceID device,
161: PMPowerManagementState
162: state
163: )
164: {
165: if (host != &realhost)
166: return KERN_INVALID_HOST;
167:
168: return PMSetPowerManagement(device, state);
169: }
170:
171: kern_return_t
172: kern_PMRestoreDefaults(
173: host_t host
174: )
175: {
176: if (host != &realhost)
177: return KERN_INVALID_HOST;
178:
179: return PMRestoreDefaults();
180: }
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