1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* libslp-pm
*
* Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
*
* Contact: DongGi Jang <dg0402.jang@samsung.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <linux/limits.h>
#include "pmapi.h"
#include "pm.h"
#define SOCK_PATH "/tmp/pm_sock"
#define SHIFT_UNLOCK 4
#define SHIFT_UNLOCK_PARAMETER 12
#define SHIFT_CHANGE_STATE 8
#define SHIFT_HOLD_KEY_BLOCK 16
#define TIMEOUT_RESET_BIT 0x80
struct pwr_msg {
pid_t pid;
unsigned int cond;
unsigned int timeout;
};
static int send_msg(unsigned int s_bits, unsigned int timeout)
{
int rc = 0;
int sock;
struct pwr_msg p;
struct sockaddr_un remote;
p.pid = getpid();
p.cond = s_bits;
p.timeout = timeout;
sock = socket(AF_UNIX, SOCK_DGRAM, 0);
if (sock == -1) {
ERR("pm socket() failed");
return -1;
}
remote.sun_family = AF_UNIX;
if(strlen(SOCK_PATH) >= sizeof(remote.sun_path)) {
ERR("socket path is vey long");
return -1;
}
strncpy(remote.sun_path, SOCK_PATH, sizeof(remote.sun_path));
rc = sendto(sock, (void *)&p, sizeof(p), 0, (struct sockaddr *)&remote,
sizeof(struct sockaddr_un));
if (rc == -1) {
ERR("pm socket sendto() failed");
} else
rc = 0;
close(sock);
return rc;
}
API int pm_change_state(unsigned int s_bits)
{
/* s_bits is LCD_NORMAL 0x1, LCD_DIM 0x2, LCD_OFF 0x4, SUSPEND 0x8
* Stage change to NORMAL 0x100
* Stage change to LCDDIM 0x200
* Stage change to LCDOFF 0x400
* Stage change to SLEEP 0x800
* */
switch (s_bits) {
case LCD_NORMAL:
case LCD_DIM:
case LCD_OFF:
case SUSPEND:
case POWER_OFF:
break;
default:
return -1;
}
return send_msg(s_bits << SHIFT_CHANGE_STATE, 0);
}
API int pm_lock_state(unsigned int s_bits, unsigned int flag,
unsigned int timeout)
{
switch (s_bits) {
case LCD_NORMAL:
case LCD_DIM:
case LCD_OFF:
break;
default:
return -1;
}
if (flag & GOTO_STATE_NOW)
/* if the flag is true, go to the locking state directly */
s_bits = s_bits | (s_bits << SHIFT_CHANGE_STATE);
if (flag & HOLD_KEY_BLOCK)
s_bits = s_bits | (1 << SHIFT_HOLD_KEY_BLOCK);
return send_msg(s_bits, timeout);
}
API int pm_unlock_state(unsigned int s_bits, unsigned int flag)
{
switch (s_bits) {
case LCD_NORMAL:
case LCD_DIM:
case LCD_OFF:
break;
default:
return -1;
}
s_bits = (s_bits << SHIFT_UNLOCK);
s_bits = (s_bits | (flag << SHIFT_UNLOCK_PARAMETER));
return send_msg(s_bits, 0);
}
|
