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allow one button rotation to be soft coded.
[android-x86/hardware-libsensors.git] / kbdsensor.cpp
1 /**
2  *
3  * Atkbd style sensor
4  *
5  * Copyright (C) 2011-2013 The Android-x86 Open Source Project
6  *
7  * by Chih-Wei Huang <cwhuang@linux.org.tw>
8  *
9  * Licensed under GPLv2 or later
10  *
11  **/
12
13 #define LOG_TAG "KbdSensor"
14
15 #include <cmath>
16 #include <cerrno>
17 #include <cstdlib>
18 #include <cstring>
19 #include <sys/stat.h>
20 #include <poll.h>
21 #include <fcntl.h>
22 #include <dirent.h>
23 #include <cutils/log.h>
24 #include <linux/input.h>
25 #include <linux/uinput.h>
26 #include <hardware/sensors.h>
27 #include <cutils/properties.h>
28
29 struct KbdSensorKeys {
30         char name[64];
31         int keys[8];
32 } KeysType[] = {
33         { "", { } },
34         { "AT Translated Set 2 keyboard", { EV_KEY, KEY_UP, KEY_RIGHT, KEY_DOWN, KEY_LEFT, KEY_LEFTALT, KEY_LEFTCTRL, 1 } },
35         { "AT Translated Set 2 keyboard", { EV_MSC, 91, 115, 123, 109, KEY_LEFTALT, KEY_LEFTCTRL, 3 } },
36         { "AT Translated Set 2 keyboard", { EV_KEY, KEY_F5, KEY_F8, KEY_F6, KEY_F7, KEY_LEFTALT, KEY_LEFTCTRL, 1 } },
37         { "AT Translated Set 2 keyboard", { EV_KEY, KEY_F9, KEY_F12, KEY_F10, KEY_F11, KEY_LEFTALT, KEY_LEFTCTRL, 1 } },
38         { "Asus Laptop extra buttons", { EV_KEY, KEY_F9, KEY_F12, KEY_F10, KEY_F11, KEY_LEFTALT, KEY_LEFTCTRL, 2 } },
39         { "HP WMI hotkeys", { -1, KEY_DIRECTION, 0, 0, 0, 0, 0, 3 } },
40 };
41
42 const int ID_ACCELERATION = (SENSORS_HANDLE_BASE + 0);
43
44 template <typename T> struct SensorFd : T {
45         SensorFd(const struct hw_module_t *module, struct hw_device_t **device);
46 };
47
48 template <typename T> SensorFd<T>::SensorFd(const struct hw_module_t *module, struct hw_device_t **device)
49 {
50         this->common.tag     = HARDWARE_DEVICE_TAG;
51         this->common.version = 0;
52         this->common.module  = const_cast<struct hw_module_t *>(module);
53         *device              = &this->common;
54         ALOGD("%s: module=%p dev=%p", __FUNCTION__, module, *device);
55 }
56
57 struct SensorPollContext : SensorFd<sensors_poll_device_t> {
58   public:
59         SensorPollContext(const struct hw_module_t *module, struct hw_device_t **device);
60         ~SensorPollContext();
61
62   private:
63         static int poll_close(struct hw_device_t *dev);
64         static int poll_activate(struct sensors_poll_device_t *dev, int handle, int enabled);
65         static int poll_setDelay(struct sensors_poll_device_t *dev, int handle, int64_t ns);
66         static int poll_poll(struct sensors_poll_device_t *dev, sensors_event_t *data, int count);
67
68         int doPoll(sensors_event_t *data, int count);
69
70         enum {
71                 ROT_0,
72                 ROT_90,
73                 ROT_180,
74                 ROT_270
75         };
76
77         bool enabled;
78         int rotation;
79         struct timespec delay;
80         struct pollfd pfd;
81         sensors_event_t orients[4];
82         KbdSensorKeys *ktype;
83 };
84
85 SensorPollContext::SensorPollContext(const struct hw_module_t *module, struct hw_device_t **device)
86       : SensorFd<sensors_poll_device_t>(module, device), enabled(false), rotation(ROT_0), ktype(KeysType)
87 {
88         common.close = poll_close;
89         activate     = poll_activate;
90         setDelay     = poll_setDelay;
91         poll         = poll_poll;
92
93         int &fd = pfd.fd;
94         const char *dirname = "/dev/input";
95         char prop[PROPERTY_VALUE_MAX];
96         if (property_get("hal.sensors.kbd.keys", prop, 0))
97                 sscanf(prop, "%s,%d,%d,%d,%d,%d,%d,%d,%d", ktype->name, ktype->keys,
98                                 ktype->keys + 1, ktype->keys + 2, ktype->keys + 3, ktype->keys + 4, ktype->keys + 5, ktype->keys + 6, ktype->keys + 7);
99         else if (property_get("hal.sensors.kbd.type", prop, 0))
100                 ktype = &KeysType[atoi(prop)];
101         else
102                 ktype = 0;
103         if (DIR *dir = opendir(dirname)) {
104                 char name[PATH_MAX];
105                 while (struct dirent *de = readdir(dir)) {
106                         if (de->d_name[0] != 'e') // not eventX
107                                 continue;
108                         snprintf(name, PATH_MAX, "%s/%s", dirname, de->d_name);
109                         fd = open(name, O_RDWR);
110                         if (fd < 0) {
111                                 ALOGE("could not open %s, %s", name, strerror(errno));
112                                 continue;
113                         }
114                         name[sizeof(name) - 1] = '\0';
115                         if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) {
116                                 ALOGE("could not get device name for %s, %s\n", name, strerror(errno));
117                                 name[0] = '\0';
118                         }
119
120                         if (ktype) {
121                                 if (!strcmp(name, ktype->name))
122                                         break;
123                         } else {
124                                 ktype = KeysType + (sizeof(KeysType) / sizeof(KeysType[0]));
125                                 while (--ktype != KeysType)
126                                         if (!strcmp(name, ktype->name))
127                                                 break;
128                                 if (ktype != KeysType)
129                                         break;
130                                 else
131                                         ktype = 0;
132                         }
133                         close(fd);
134                         fd = -1;
135                 }
136                 ALOGI_IF(fd >= 0, "Open %s ok, fd=%d", name, fd);
137                 closedir(dir);
138         }
139
140         pfd.events = POLLIN;
141         orients[ROT_0].version = sizeof(sensors_event_t);
142         orients[ROT_0].sensor = ID_ACCELERATION;
143         orients[ROT_0].type = SENSOR_TYPE_ACCELEROMETER;
144         orients[ROT_0].acceleration.status = SENSOR_STATUS_ACCURACY_HIGH;
145         orients[ROT_270] = orients[ROT_180] = orients[ROT_90] = orients[ROT_0];
146         const double angle = 20.0;
147         const double cos_angle = GRAVITY_EARTH * cos(angle / M_PI);
148         const double sin_angle = GRAVITY_EARTH * sin(angle / M_PI);
149         orients[ROT_0].acceleration.x   = 0.0;
150         orients[ROT_0].acceleration.y   = cos_angle;
151         orients[ROT_0].acceleration.z   = sin_angle;
152         orients[ROT_90].acceleration.x  = cos_angle;
153         orients[ROT_90].acceleration.y  = 0.0;
154         orients[ROT_90].acceleration.z  = sin_angle;
155         orients[ROT_180].acceleration.x = 0.0;
156         orients[ROT_180].acceleration.y = -cos_angle;
157         orients[ROT_180].acceleration.z = -sin_angle;
158         orients[ROT_270].acceleration.x = -cos_angle;
159         orients[ROT_270].acceleration.y = 0.0;
160         orients[ROT_270].acceleration.z = -sin_angle;
161
162         delay.tv_sec = 0;
163         delay.tv_nsec = 200000000L;
164
165         ALOGD("%s: dev=%p fd=%d", __FUNCTION__, this, fd);
166 }
167
168 SensorPollContext::~SensorPollContext()
169 {
170         close(pfd.fd);
171 }
172
173 int SensorPollContext::poll_close(struct hw_device_t *dev)
174 {
175         ALOGD("%s: dev=%p", __FUNCTION__, dev);
176         delete reinterpret_cast<SensorPollContext *>(dev);
177         return 0;
178 }
179
180 int SensorPollContext::poll_activate(struct sensors_poll_device_t *dev, int handle, int enabled)
181 {
182         ALOGD("%s: dev=%p handle=%d enabled=%d", __FUNCTION__, dev, handle, enabled);
183         SensorPollContext *ctx = reinterpret_cast<SensorPollContext *>(dev);
184         ctx->enabled = enabled;
185         return 0;
186 }
187
188 int SensorPollContext::poll_setDelay(struct sensors_poll_device_t *dev, int handle, int64_t ns)
189 {
190         ALOGD("%s: dev=%p delay-ns=%lld", __FUNCTION__, dev, ns);
191         return 0;
192 }
193
194 int SensorPollContext::poll_poll(struct sensors_poll_device_t *dev, sensors_event_t *data, int count)
195 {
196         ALOGV("%s: dev=%p data=%p count=%d", __FUNCTION__, dev, data, count);
197         SensorPollContext *ctx = reinterpret_cast<SensorPollContext *>(dev);
198         return ctx->doPoll(data, count);
199 }
200
201 int SensorPollContext::doPoll(sensors_event_t *data, int count)
202 {
203         nanosleep(&delay, 0);
204         int *keys = ktype->keys;
205         while (int pollres = ::poll(&pfd, 1, -1)) {
206                 if (pollres < 0) {
207                         ALOGE("%s: poll %d error: %s", __FUNCTION__, pfd.fd, strerror(errno));
208                         break;
209                 }
210                 if (!(pfd.revents & POLLIN)) {
211                         ALOGW("%s: ignore revents %d", __FUNCTION__, pfd.revents);
212                         continue;
213                 }
214
215                 struct input_event iev;
216                 size_t res = ::read(pfd.fd, &iev, sizeof(iev));
217                 if (res < sizeof(iev)) {
218                         ALOGW("insufficient input data(%d)? fd=%d", res, pfd.fd);
219                         continue;
220                 }
221                 ALOGV("type=%d scancode=%d value=%d from fd=%d", iev.type, iev.code, iev.value, pfd.fd);
222                 if (iev.type == keys[0]) {
223                         int rot;
224                         int input = (keys[0] == EV_MSC) ? iev.value : iev.code;
225                         if (input == keys[1])
226                                 rot = ROT_0;
227                         else if (input == keys[2])
228                                 rot = ROT_90;
229                         else if (input == keys[3])
230                                 rot = ROT_180;
231                         else if (input == keys[4])
232                                 rot = ROT_270;
233                         else if (input == keys[5] || input == keys[6])
234                                 rot = rotation;
235                         else
236                                 rot = -1;
237
238                         if (rot >= 0) {
239                                 if (rot != rotation) {
240                                         ALOGI("orientation changed from %d to %d", rotation * 90, rot * 90);
241                                         rotation = rot;
242                                 }
243                                 if (enabled && count > 0)
244                                         break;
245                         }
246                 } else if (iev.type == EV_KEY && iev.code == keys[1] && iev.value) {
247                         if (rotation == ROT_270)
248                                 rotation = ROT_0;
249                         else
250                                 rotation++;
251                         break;
252                 } else if (iev.type == EV_SW && iev.code == SW_TABLET_MODE) {
253                         if (!iev.value)
254                                 rotation = ROT_0;
255                         else if (rotation == ROT_0)
256                                 rotation = ROT_90;
257                         break;
258                 }
259         }
260
261         int cnt;
262         struct timespec t;
263         data[0] = orients[rotation];
264         t.tv_sec = t.tv_nsec = 0;
265         clock_gettime(CLOCK_MONOTONIC, &t);
266         data[0].timestamp = int64_t(t.tv_sec) * 1000000000LL + t.tv_nsec;
267         for (cnt = 1; cnt < keys[7] && cnt < count; ++cnt) {
268                 data[cnt] = data[cnt - 1];
269                 data[cnt].timestamp += delay.tv_nsec;
270                 nanosleep(&delay, 0);
271         }
272         ALOGV("%s: dev=%p fd=%d rotation=%d cnt=%d", __FUNCTION__, this, pfd.fd, rotation * 90, cnt);
273         return cnt;
274 }
275
276 static int open_kbd_sensor(const struct hw_module_t *module, const char *id, struct hw_device_t **device)
277 {
278         ALOGD("%s: id=%s", __FUNCTION__, id);
279         return new SensorPollContext(module, device) ? 0 : -EINVAL;
280 }
281
282 static struct sensor_t sSensorListInit[] = {
283         {
284                 name: "Kbd Orientation Sensor",
285                 vendor: "Android-x86 Open Source Project",
286                 version: 1,
287                 handle: ID_ACCELERATION,
288                 type: SENSOR_TYPE_ACCELEROMETER,
289                 maxRange: 2.8f,
290                 resolution: 1.0f/4032.0f,
291                 power: 3.0f,
292                 minDelay: 0,
293                 fifoReservedEventCount: 0,
294                 fifoMaxEventCount: 0,
295                 reserved: { }
296         }
297 };
298
299 static int sensors_get_sensors_list(struct sensors_module_t *module, struct sensor_t const **list)
300 {
301         *list = sSensorListInit;
302         return sizeof(sSensorListInit) / sizeof(struct sensor_t);
303 }
304
305 static struct hw_module_methods_t sensors_methods = {
306         open: open_kbd_sensor
307 };
308
309 struct sensors_module_t HAL_MODULE_INFO_SYM = {
310         common: {
311                 tag: HARDWARE_MODULE_TAG,
312                 version_major: 2,
313                 version_minor: 3,
314                 id: SENSORS_HARDWARE_MODULE_ID,
315                 name: "Kbd Orientation Sensor",
316                 author: "Chih-Wei Huang",
317                 methods: &sensors_methods,
318                 dso: 0,
319                 reserved: { }
320         },
321         get_sensors_list: sensors_get_sensors_list
322 };