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0ed4d10d JW |
1 | /* |
2 | File: Ambien.h | |
3 | Program: Ambien | |
4 | Original author: Michael Roßberg | |
5 | mick@binaervarianz.de | |
6 | Rewritten by: Joshua Wise | |
7 | jwise@andrew.cmu.edu | |
8 | Description: Ambien is a kernel extension to disable sleep-on-clamshell. | |
9 | ||
10 | Ambien is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | Ambien is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with Ambien; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include "Ambien.h" | |
26 | #include <IOKit/IOLib.h> | |
27 | #include <IOKit/pwr_mgt/RootDomain.h> | |
28 | #include <IOKit/pwr_mgt/IOPM.h> | |
29 | ||
30 | #define super IOService | |
31 | ||
32 | OSDefineMetaClassAndStructors(Ambien, IOService); | |
33 | ||
34 | bool Ambien::init(OSDictionary* properties) | |
35 | { | |
36 | IOLog("Ambien.kext for Mac OS X Leopard, by Joshua Wise\n"); | |
37 | ||
38 | _workLoop = 0; | |
39 | if (super::init(properties) == false) { | |
40 | IOLog("Ambien::init: super::init failed\n"); | |
41 | return false; | |
42 | } | |
43 | ||
44 | return true; | |
45 | } | |
46 | ||
47 | bool Ambien::start(IOService* provider) | |
48 | { | |
49 | static IOPMPowerState states[] = | |
50 | { | |
51 | {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, | |
52 | {1, kIOPMDeviceUsable, kIOPMPowerOn, kIOPMPowerOn, 0, 0, 0, 0, 0, 0, 0, 0} | |
53 | }; | |
54 | ||
55 | if (!super::start(provider)) { | |
56 | IOLog("Ambien::start: super::start failed\n"); | |
57 | return false; | |
58 | } | |
59 | ||
60 | PMinit(); | |
61 | provider->joinPMtree(this); | |
62 | if (registerPowerDriver(this, states, 2) != IOPMNoErr) | |
63 | { | |
64 | IOLog("Ambien::start: registerPowerDriver returned error -- uh-oh!\n"); | |
65 | return false; | |
66 | } | |
67 | ||
68 | return true; | |
69 | } | |
70 | ||
71 | void Ambien::stop(IOService* provider) | |
72 | { | |
73 | if (_workLoop) | |
74 | { | |
75 | _workLoop->release(); | |
76 | _workLoop = 0; | |
77 | } | |
78 | ||
79 | PMstop(); | |
80 | super::stop(provider); | |
81 | IOLog("Ambien: your sleep schedule is back to you!\n"); | |
82 | } | |
83 | ||
84 | IOReturn Ambien::setPowerState(unsigned long which, IOService *dev) | |
85 | { | |
86 | if (which == 0) | |
87 | { | |
88 | IOLog("Ambien::setPowerState: system going to sleep\n"); | |
89 | } else { | |
90 | IOLog("Ambien::setPowerState: system is awake\n"); | |
91 | } | |
92 | ||
93 | return kIOPMAckImplied; | |
94 | } | |
95 | ||
96 | void Ambien::free() | |
97 | { | |
98 | super::free(); | |
99 | return; | |
100 | } | |
101 | ||
102 | IOWorkLoop* Ambien::getWorkLoop() | |
103 | { | |
104 | if (!_workLoop) | |
105 | _workLoop = IOWorkLoop::workLoop(); | |
106 | ||
107 | return _workLoop; | |
108 | } | |
109 | ||
110 | IOReturn Ambien::message(UInt32 type, IOService *provider, void *arg) | |
111 | { | |
bd04291d | 112 | unsigned int argi = (unsigned int)(unsigned long)/* screw off, it's a bitmask, not a pointer */arg; |
0ed4d10d JW |
113 | |
114 | if (type == kIOPMMessageClamshellStateChange) | |
115 | { | |
116 | IOPMrootDomain *root = NULL; | |
117 | ||
118 | IOLog("Ambien::message: kIOPMMessageClamshellStateChange: lid is %s, sleep bit is %d (arg %08x)\n", | |
119 | (argi & kClamshellStateBit) ? "closed" : "open", | |
120 | !!(argi & kClamshellSleepBit), argi); | |
121 | ||
122 | root = getPMRootDomain(); | |
123 | if (!root) | |
124 | { | |
125 | IOLog("Ambien::message: failed to get PM root?\n"); | |
126 | return 0; | |
127 | } | |
128 | root->receivePowerNotification((argi & kClamshellStateBit) ? kIOPMPreventSleep : kIOPMAllowSleep); | |
129 | } else | |
130 | IOLog("Ambien::message: unknown type %08x (so I won't worry about it)\n", (unsigned int)type); | |
131 | return super::message(type, provider, arg); | |
132 | } |