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Doug Zongker32a0a472011-11-01 11:00:20 -07001/*
2 * Copyright (C) 2011 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#include <errno.h>
18#include <fcntl.h>
19#include <linux/input.h>
20#include <pthread.h>
21#include <stdarg.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/stat.h>
26#include <sys/time.h>
27#include <sys/types.h>
28#include <time.h>
29#include <unistd.h>
30
31#include <cutils/android_reboot.h>
32
33#include "common.h"
Doug Zongker9e805d62013-09-04 13:44:38 -070034#include "roots.h"
Doug Zongker32a0a472011-11-01 11:00:20 -070035#include "device.h"
36#include "minui/minui.h"
37#include "screen_ui.h"
38#include "ui.h"
39
40#define UI_WAIT_KEY_TIMEOUT_SEC 120
41
Elliott Hughesec283402015-04-10 10:01:53 -070042RecoveryUI::RecoveryUI()
43 : key_queue_len(0),
44 key_last_down(-1),
45 key_long_press(false),
46 key_down_count(0),
47 enable_reboot(true),
48 consecutive_power_keys(0),
Elliott Hughes642aaa72015-04-10 12:47:46 -070049 last_key(-1),
50 has_power_key(false),
51 has_up_key(false),
52 has_down_key(false) {
Elliott Hughes985022a2015-04-13 13:04:32 -070053 pthread_mutex_init(&key_queue_mutex, nullptr);
54 pthread_cond_init(&key_queue_cond, nullptr);
Mihai Serban187d6262014-06-06 15:23:20 +030055 memset(key_pressed, 0, sizeof(key_pressed));
Doug Zongker32a0a472011-11-01 11:00:20 -070056}
57
Elliott Hughes642aaa72015-04-10 12:47:46 -070058void RecoveryUI::OnKeyDetected(int key_code) {
59 if (key_code == KEY_POWER) {
60 has_power_key = true;
61 } else if (key_code == KEY_DOWN || key_code == KEY_VOLUMEDOWN) {
62 has_down_key = true;
63 } else if (key_code == KEY_UP || key_code == KEY_VOLUMEUP) {
64 has_up_key = true;
65 }
66}
67
Elliott Hughes985022a2015-04-13 13:04:32 -070068int RecoveryUI::InputCallback(int fd, uint32_t epevents, void* data) {
69 return reinterpret_cast<RecoveryUI*>(data)->OnInputEvent(fd, epevents);
Doug Zongker32a0a472011-11-01 11:00:20 -070070}
71
Elliott Hughes985022a2015-04-13 13:04:32 -070072// Reads input events, handles special hot keys, and adds to the key queue.
73static void* InputThreadLoop(void*) {
74 while (true) {
75 if (!ev_wait(-1)) {
76 ev_dispatch();
77 }
78 }
79 return nullptr;
80}
81
82void RecoveryUI::Init() {
83 ev_init(InputCallback, this);
84
85 ev_iterate_available_keys(std::bind(&RecoveryUI::OnKeyDetected, this, std::placeholders::_1));
86
87 pthread_create(&input_thread_, nullptr, InputThreadLoop, nullptr);
88}
89
90int RecoveryUI::OnInputEvent(int fd, uint32_t epevents) {
Doug Zongker32a0a472011-11-01 11:00:20 -070091 struct input_event ev;
Elliott Hughes642aaa72015-04-10 12:47:46 -070092 if (ev_get_input(fd, epevents, &ev) == -1) {
Doug Zongker32a0a472011-11-01 11:00:20 -070093 return -1;
Elliott Hughes642aaa72015-04-10 12:47:46 -070094 }
Doug Zongker32a0a472011-11-01 11:00:20 -070095
96 if (ev.type == EV_SYN) {
97 return 0;
98 } else if (ev.type == EV_REL) {
99 if (ev.code == REL_Y) {
100 // accumulate the up or down motion reported by
101 // the trackball. When it exceeds a threshold
102 // (positive or negative), fake an up/down
103 // key event.
Elliott Hughes985022a2015-04-13 13:04:32 -0700104 rel_sum += ev.value;
105 if (rel_sum > 3) {
106 ProcessKey(KEY_DOWN, 1); // press down key
107 ProcessKey(KEY_DOWN, 0); // and release it
108 rel_sum = 0;
109 } else if (rel_sum < -3) {
110 ProcessKey(KEY_UP, 1); // press up key
111 ProcessKey(KEY_UP, 0); // and release it
112 rel_sum = 0;
Doug Zongker32a0a472011-11-01 11:00:20 -0700113 }
114 }
115 } else {
Elliott Hughes985022a2015-04-13 13:04:32 -0700116 rel_sum = 0;
Doug Zongker32a0a472011-11-01 11:00:20 -0700117 }
118
Elliott Hughes642aaa72015-04-10 12:47:46 -0700119 if (ev.type == EV_KEY && ev.code <= KEY_MAX) {
Elliott Hughes985022a2015-04-13 13:04:32 -0700120 ProcessKey(ev.code, ev.value);
Elliott Hughes642aaa72015-04-10 12:47:46 -0700121 }
Doug Zongker32a0a472011-11-01 11:00:20 -0700122
123 return 0;
124}
125
126// Process a key-up or -down event. A key is "registered" when it is
127// pressed and then released, with no other keypresses or releases in
128// between. Registered keys are passed to CheckKey() to see if it
129// should trigger a visibility toggle, an immediate reboot, or be
130// queued to be processed next time the foreground thread wants a key
131// (eg, for the menu).
132//
133// We also keep track of which keys are currently down so that
134// CheckKey can call IsKeyPressed to see what other keys are held when
135// a key is registered.
136//
137// updown == 1 for key down events; 0 for key up events
Elliott Hughes985022a2015-04-13 13:04:32 -0700138void RecoveryUI::ProcessKey(int key_code, int updown) {
Doug Zongker32a0a472011-11-01 11:00:20 -0700139 bool register_key = false;
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800140 bool long_press = false;
Doug Zongkerc704e062014-05-23 08:40:35 -0700141 bool reboot_enabled;
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800142
Doug Zongker32a0a472011-11-01 11:00:20 -0700143 pthread_mutex_lock(&key_queue_mutex);
144 key_pressed[key_code] = updown;
145 if (updown) {
Doug Zongkerc0441d12013-07-31 11:28:24 -0700146 ++key_down_count;
Doug Zongker32a0a472011-11-01 11:00:20 -0700147 key_last_down = key_code;
Doug Zongkerc0441d12013-07-31 11:28:24 -0700148 key_long_press = false;
Doug Zongkerc0441d12013-07-31 11:28:24 -0700149 key_timer_t* info = new key_timer_t;
150 info->ui = this;
151 info->key_code = key_code;
152 info->count = key_down_count;
Elliott Hughes985022a2015-04-13 13:04:32 -0700153 pthread_t thread;
154 pthread_create(&thread, nullptr, &RecoveryUI::time_key_helper, info);
155 pthread_detach(thread);
Doug Zongker32a0a472011-11-01 11:00:20 -0700156 } else {
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800157 if (key_last_down == key_code) {
Doug Zongkerc0441d12013-07-31 11:28:24 -0700158 long_press = key_long_press;
Doug Zongker32a0a472011-11-01 11:00:20 -0700159 register_key = true;
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800160 }
Doug Zongker32a0a472011-11-01 11:00:20 -0700161 key_last_down = -1;
162 }
Doug Zongkerc704e062014-05-23 08:40:35 -0700163 reboot_enabled = enable_reboot;
Doug Zongker32a0a472011-11-01 11:00:20 -0700164 pthread_mutex_unlock(&key_queue_mutex);
165
166 if (register_key) {
Elliott Hughes642aaa72015-04-10 12:47:46 -0700167 switch (CheckKey(key_code, long_press)) {
Doug Zongker48b5b072012-01-18 13:46:26 -0800168 case RecoveryUI::IGNORE:
169 break;
170
Doug Zongker32a0a472011-11-01 11:00:20 -0700171 case RecoveryUI::TOGGLE:
172 ShowText(!IsTextVisible());
173 break;
174
175 case RecoveryUI::REBOOT:
Doug Zongkerc704e062014-05-23 08:40:35 -0700176 if (reboot_enabled) {
Gaelle Nassiet074c1c22015-05-27 10:39:29 +0200177 property_set(ANDROID_RB_PROPERTY, "reboot,");
178 while(1) { pause(); }
Doug Zongkerc704e062014-05-23 08:40:35 -0700179 }
Doug Zongker32a0a472011-11-01 11:00:20 -0700180 break;
181
182 case RecoveryUI::ENQUEUE:
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800183 EnqueueKey(key_code);
Doug Zongker32a0a472011-11-01 11:00:20 -0700184 break;
185 }
186 }
187}
188
Doug Zongkerc0441d12013-07-31 11:28:24 -0700189void* RecoveryUI::time_key_helper(void* cookie) {
190 key_timer_t* info = (key_timer_t*) cookie;
191 info->ui->time_key(info->key_code, info->count);
192 delete info;
Elliott Hughes985022a2015-04-13 13:04:32 -0700193 return nullptr;
Doug Zongkerc0441d12013-07-31 11:28:24 -0700194}
195
196void RecoveryUI::time_key(int key_code, int count) {
197 usleep(750000); // 750 ms == "long"
198 bool long_press = false;
199 pthread_mutex_lock(&key_queue_mutex);
200 if (key_last_down == key_code && key_down_count == count) {
201 long_press = key_long_press = true;
202 }
203 pthread_mutex_unlock(&key_queue_mutex);
204 if (long_press) KeyLongPress(key_code);
205}
206
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800207void RecoveryUI::EnqueueKey(int key_code) {
208 pthread_mutex_lock(&key_queue_mutex);
209 const int queue_max = sizeof(key_queue) / sizeof(key_queue[0]);
210 if (key_queue_len < queue_max) {
211 key_queue[key_queue_len++] = key_code;
212 pthread_cond_signal(&key_queue_cond);
213 }
214 pthread_mutex_unlock(&key_queue_mutex);
215}
216
Elliott Hughesec283402015-04-10 10:01:53 -0700217int RecoveryUI::WaitKey() {
Doug Zongker32a0a472011-11-01 11:00:20 -0700218 pthread_mutex_lock(&key_queue_mutex);
219
220 // Time out after UI_WAIT_KEY_TIMEOUT_SEC, unless a USB cable is
221 // plugged in.
222 do {
223 struct timeval now;
224 struct timespec timeout;
Elliott Hughes985022a2015-04-13 13:04:32 -0700225 gettimeofday(&now, nullptr);
Doug Zongker32a0a472011-11-01 11:00:20 -0700226 timeout.tv_sec = now.tv_sec;
227 timeout.tv_nsec = now.tv_usec * 1000;
228 timeout.tv_sec += UI_WAIT_KEY_TIMEOUT_SEC;
229
230 int rc = 0;
231 while (key_queue_len == 0 && rc != ETIMEDOUT) {
Elliott Hughesec283402015-04-10 10:01:53 -0700232 rc = pthread_cond_timedwait(&key_queue_cond, &key_queue_mutex, &timeout);
Doug Zongker32a0a472011-11-01 11:00:20 -0700233 }
Elliott Hughes985022a2015-04-13 13:04:32 -0700234 } while (IsUsbConnected() && key_queue_len == 0);
Doug Zongker32a0a472011-11-01 11:00:20 -0700235
236 int key = -1;
237 if (key_queue_len > 0) {
238 key = key_queue[0];
239 memcpy(&key_queue[0], &key_queue[1], sizeof(int) * --key_queue_len);
240 }
241 pthread_mutex_unlock(&key_queue_mutex);
242 return key;
243}
244
Elliott Hughes985022a2015-04-13 13:04:32 -0700245bool RecoveryUI::IsUsbConnected() {
Doug Zongker32a0a472011-11-01 11:00:20 -0700246 int fd = open("/sys/class/android_usb/android0/state", O_RDONLY);
247 if (fd < 0) {
248 printf("failed to open /sys/class/android_usb/android0/state: %s\n",
249 strerror(errno));
250 return 0;
251 }
252
253 char buf;
Elliott Hughes985022a2015-04-13 13:04:32 -0700254 // USB is connected if android_usb state is CONNECTED or CONFIGURED.
Elliott Hughes7bad7c42015-04-28 17:24:24 -0700255 int connected = (TEMP_FAILURE_RETRY(read(fd, &buf, 1)) == 1) && (buf == 'C');
Doug Zongker32a0a472011-11-01 11:00:20 -0700256 if (close(fd) < 0) {
257 printf("failed to close /sys/class/android_usb/android0/state: %s\n",
258 strerror(errno));
259 }
260 return connected;
261}
262
Elliott Hughesec283402015-04-10 10:01:53 -0700263bool RecoveryUI::IsKeyPressed(int key) {
Doug Zongker32a0a472011-11-01 11:00:20 -0700264 pthread_mutex_lock(&key_queue_mutex);
265 int pressed = key_pressed[key];
266 pthread_mutex_unlock(&key_queue_mutex);
267 return pressed;
268}
269
Elliott Hughes642aaa72015-04-10 12:47:46 -0700270bool RecoveryUI::IsLongPress() {
271 pthread_mutex_lock(&key_queue_mutex);
272 bool result = key_long_press;
273 pthread_mutex_unlock(&key_queue_mutex);
274 return result;
275}
276
Elliott Hughes4af215b2015-04-10 15:00:34 -0700277bool RecoveryUI::HasThreeButtons() {
278 return has_power_key && has_up_key && has_down_key;
279}
280
Doug Zongker32a0a472011-11-01 11:00:20 -0700281void RecoveryUI::FlushKeys() {
282 pthread_mutex_lock(&key_queue_mutex);
283 key_queue_len = 0;
284 pthread_mutex_unlock(&key_queue_mutex);
285}
286
Elliott Hughes642aaa72015-04-10 12:47:46 -0700287RecoveryUI::KeyAction RecoveryUI::CheckKey(int key, bool is_long_press) {
288 pthread_mutex_lock(&key_queue_mutex);
289 key_long_press = false;
290 pthread_mutex_unlock(&key_queue_mutex);
291
292 // If we have power and volume up keys, that chord is the signal to toggle the text display.
Elliott Hughes4af215b2015-04-10 15:00:34 -0700293 if (HasThreeButtons()) {
Elliott Hughes642aaa72015-04-10 12:47:46 -0700294 if (key == KEY_VOLUMEUP && IsKeyPressed(KEY_POWER)) {
295 return TOGGLE;
296 }
297 } else {
298 // Otherwise long press of any button toggles to the text display,
299 // and there's no way to toggle back (but that's pretty useless anyway).
300 if (is_long_press && !IsTextVisible()) {
301 return TOGGLE;
302 }
303
304 // Also, for button-limited devices, a long press is translated to KEY_ENTER.
305 if (is_long_press && IsTextVisible()) {
306 EnqueueKey(KEY_ENTER);
307 return IGNORE;
308 }
Doug Zongker9e805d62013-09-04 13:44:38 -0700309 }
310
Elliott Hughes642aaa72015-04-10 12:47:46 -0700311 // Press power seven times in a row to reboot.
Doug Zongker9e805d62013-09-04 13:44:38 -0700312 if (key == KEY_POWER) {
Doug Zongkerc704e062014-05-23 08:40:35 -0700313 pthread_mutex_lock(&key_queue_mutex);
314 bool reboot_enabled = enable_reboot;
315 pthread_mutex_unlock(&key_queue_mutex);
316
317 if (reboot_enabled) {
318 ++consecutive_power_keys;
319 if (consecutive_power_keys >= 7) {
320 return REBOOT;
321 }
Doug Zongker9e805d62013-09-04 13:44:38 -0700322 }
323 } else {
324 consecutive_power_keys = 0;
325 }
326
Doug Zongker9e805d62013-09-04 13:44:38 -0700327 last_key = key;
Elliott Hughes642aaa72015-04-10 12:47:46 -0700328 return IsTextVisible() ? ENQUEUE : IGNORE;
Doug Zongker32a0a472011-11-01 11:00:20 -0700329}
Doug Zongkerbb01d0c2012-12-17 10:52:58 -0800330
Elliott Hughes642aaa72015-04-10 12:47:46 -0700331void RecoveryUI::KeyLongPress(int) {
Doug Zongkerc0441d12013-07-31 11:28:24 -0700332}
Doug Zongkerc704e062014-05-23 08:40:35 -0700333
334void RecoveryUI::SetEnableReboot(bool enabled) {
335 pthread_mutex_lock(&key_queue_mutex);
336 enable_reboot = enabled;
337 pthread_mutex_unlock(&key_queue_mutex);
338}