1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "CHARGER_TOUCH"
18 #include <hardware_legacy/uevent.h>
19 #include <utils/Log.h>
20 #include <fcntl.h>
21
22 #define POWER_SUPPLY_PATH "/sys/class/power_supply"
23 #define TOUCH_PATH "/sys/devices/virtual/input/lge_touch/charger"
24
25 const char* WIRELESS = "change@/devices/platform/bq51051b_wlc/power_supply/wireless";
26 const char* USB = "change@/devices/platform/msm_ssbi.0/pm8921-core/pm8921-charger/power_supply/usb";
27
28 enum {
29 NO_CHARGER,
30 CHARGER_WIRELESS,
31 CHARGER_USB,
32 CHARGER_AC
33 };
34
read_path(const char * path,char * buf,size_t size)35 static void read_path(const char* path, char* buf, size_t size)
36 {
37 int fd = open(path, O_RDONLY, 0);
38 int count;
39
40 if (fd < 0) {
41 ALOGE("Could not open %s", path);
42 return;
43 }
44 count = read(fd, buf, size);
45
46 close(fd);
47 }
48
write_path(int type)49 static void write_path(int type)
50 {
51 int fd = open(TOUCH_PATH, O_RDWR, 0);
52 char buf[2];
53
54 if (fd < 0) {
55 ALOGE("Could not open %s", TOUCH_PATH);
56 return;
57 }
58
59 snprintf(buf, sizeof(buf), "%d", type);
60 write(fd, buf, 1);
61
62 close(fd);
63 }
64
handle_uevent(const char * udata)65 static void handle_uevent(const char* udata)
66 {
67 const char *str = udata;
68 char path[PATH_MAX];
69 char wlc[2], usb[2], ac[2];
70 int type = NO_CHARGER;
71
72 memset(wlc, 0, 2);
73 memset(usb, 0, 2);
74 memset(ac, 0, 2);
75
76 if (!strncmp(str, WIRELESS, strlen(WIRELESS))) {
77 snprintf(path, sizeof(path), "%s/wireless/online", POWER_SUPPLY_PATH);
78 read_path(path, wlc, 1);
79 if (!strncmp(wlc, "1", 1))
80 type = CHARGER_WIRELESS;
81
82 ALOGE("Type: %d", type);
83 write_path(type);
84 } else if (!strncmp(str, USB, strlen(USB))) {
85 snprintf(path, sizeof(path), "%s/usb/online", POWER_SUPPLY_PATH);
86 read_path(path, usb, 1);
87
88 snprintf(path, sizeof(path), "%s/pm8921-dc/online", POWER_SUPPLY_PATH);
89 read_path(path, ac, 1);
90
91 if (!strncmp(usb, "1", 1)) {
92 type = CHARGER_USB;
93 } else if (!strncmp(ac, "1", 1)) {
94 type = CHARGER_AC;
95 }
96
97 ALOGE("Type: %d", type);
98 write_path(type);
99 }
100
101 }
102
event_loop(void)103 static void event_loop(void)
104 {
105 int len = 0;
106 static char udata[4096];
107 memset(udata, 0, sizeof(udata));
108
109 uevent_init();
110
111 while (1) {
112 len = uevent_next_event(udata, sizeof(udata) - 2);
113 handle_uevent(udata);
114 }
115 }
116
main()117 int main()
118 {
119 event_loop();
120 return 0;
121 }
122