1 /* 2 * Copyright (C) 2011-2013 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 <dirent.h> 18 #include <errno.h> 19 #include <fcntl.h> 20 #include <inttypes.h> 21 #include <linux/input.h> 22 #include <stdbool.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 #include <sys/epoll.h> 27 #include <sys/stat.h> 28 #include <sys/types.h> 29 #include <sys/un.h> 30 #include <time.h> 31 #include <unistd.h> 32 33 #include <sys/socket.h> 34 #include <linux/netlink.h> 35 36 #include <batteryservice/BatteryService.h> 37 #include <cutils/android_reboot.h> 38 #include <cutils/klog.h> 39 #include <cutils/misc.h> 40 #include <cutils/uevent.h> 41 #include <cutils/properties.h> 42 43 #ifdef CHARGER_ENABLE_SUSPEND 44 #include <suspend/autosuspend.h> 45 #endif 46 47 #include "minui/minui.h" 48 49 #include "healthd.h" 50 51 char *locale; 52 53 #ifndef max 54 #define max(a,b) ((a) > (b) ? (a) : (b)) 55 #endif 56 57 #ifndef min 58 #define min(a,b) ((a) < (b) ? (a) : (b)) 59 #endif 60 61 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) 62 63 #define MSEC_PER_SEC (1000LL) 64 #define NSEC_PER_MSEC (1000000LL) 65 66 #define BATTERY_UNKNOWN_TIME (2 * MSEC_PER_SEC) 67 #define POWER_ON_KEY_TIME (2 * MSEC_PER_SEC) 68 #define UNPLUGGED_SHUTDOWN_TIME (10 * MSEC_PER_SEC) 69 70 #define BATTERY_FULL_THRESH 95 71 72 #define LAST_KMSG_PATH "/proc/last_kmsg" 73 #define LAST_KMSG_PSTORE_PATH "/sys/fs/pstore/console-ramoops" 74 #define LAST_KMSG_MAX_SZ (32 * 1024) 75 76 #define LOGE(x...) do { KLOG_ERROR("charger", x); } while (0) 77 #define LOGW(x...) do { KLOG_WARNING("charger", x); } while (0) 78 #define LOGV(x...) do { KLOG_DEBUG("charger", x); } while (0) 79 80 struct key_state { 81 bool pending; 82 bool down; 83 int64_t timestamp; 84 }; 85 86 struct frame { 87 int disp_time; 88 int min_capacity; 89 bool level_only; 90 91 GRSurface* surface; 92 }; 93 94 struct animation { 95 bool run; 96 97 struct frame *frames; 98 int cur_frame; 99 int num_frames; 100 101 int cur_cycle; 102 int num_cycles; 103 104 /* current capacity being animated */ 105 int capacity; 106 }; 107 108 struct charger { 109 bool have_battery_state; 110 bool charger_connected; 111 int64_t next_screen_transition; 112 int64_t next_key_check; 113 int64_t next_pwr_check; 114 115 struct key_state keys[KEY_MAX + 1]; 116 117 struct animation *batt_anim; 118 GRSurface* surf_unknown; 119 int boot_min_cap; 120 }; 121 122 static struct frame batt_anim_frames[] = { 123 { 124 .disp_time = 750, 125 .min_capacity = 0, 126 .level_only = false, 127 .surface = NULL, 128 }, 129 { 130 .disp_time = 750, 131 .min_capacity = 20, 132 .level_only = false, 133 .surface = NULL, 134 }, 135 { 136 .disp_time = 750, 137 .min_capacity = 40, 138 .level_only = false, 139 .surface = NULL, 140 }, 141 { 142 .disp_time = 750, 143 .min_capacity = 60, 144 .level_only = false, 145 .surface = NULL, 146 }, 147 { 148 .disp_time = 750, 149 .min_capacity = 80, 150 .level_only = true, 151 .surface = NULL, 152 }, 153 { 154 .disp_time = 750, 155 .min_capacity = BATTERY_FULL_THRESH, 156 .level_only = false, 157 .surface = NULL, 158 }, 159 }; 160 161 static struct animation battery_animation = { 162 .run = false, 163 .frames = batt_anim_frames, 164 .cur_frame = 0, 165 .num_frames = ARRAY_SIZE(batt_anim_frames), 166 .cur_cycle = 0, 167 .num_cycles = 3, 168 .capacity = 0, 169 }; 170 171 static struct charger charger_state; 172 static struct healthd_config *healthd_config; 173 static struct android::BatteryProperties *batt_prop; 174 static int char_width; 175 static int char_height; 176 static bool minui_inited; 177 178 /* current time in milliseconds */ 179 static int64_t curr_time_ms(void) 180 { 181 struct timespec tm; 182 clock_gettime(CLOCK_MONOTONIC, &tm); 183 return tm.tv_sec * MSEC_PER_SEC + (tm.tv_nsec / NSEC_PER_MSEC); 184 } 185 186 static void clear_screen(void) 187 { 188 gr_color(0, 0, 0, 255); 189 gr_clear(); 190 } 191 192 #define MAX_KLOG_WRITE_BUF_SZ 256 193 194 static void dump_last_kmsg(void) 195 { 196 char *buf; 197 char *ptr; 198 unsigned sz = 0; 199 int len; 200 201 LOGW("\n"); 202 LOGW("*************** LAST KMSG ***************\n"); 203 LOGW("\n"); 204 buf = (char *)load_file(LAST_KMSG_PSTORE_PATH, &sz); 205 206 if (!buf || !sz) { 207 buf = (char *)load_file(LAST_KMSG_PATH, &sz); 208 if (!buf || !sz) { 209 LOGW("last_kmsg not found. Cold reset?\n"); 210 goto out; 211 } 212 } 213 214 len = min(sz, LAST_KMSG_MAX_SZ); 215 ptr = buf + (sz - len); 216 217 while (len > 0) { 218 int cnt = min(len, MAX_KLOG_WRITE_BUF_SZ); 219 char yoink; 220 char *nl; 221 222 nl = (char *)memrchr(ptr, '\n', cnt - 1); 223 if (nl) 224 cnt = nl - ptr + 1; 225 226 yoink = ptr[cnt]; 227 ptr[cnt] = '\0'; 228 klog_write(6, "<4>%s", ptr); 229 ptr[cnt] = yoink; 230 231 len -= cnt; 232 ptr += cnt; 233 } 234 235 free(buf); 236 237 out: 238 LOGW("\n"); 239 LOGW("************* END LAST KMSG *************\n"); 240 LOGW("\n"); 241 } 242 243 #ifdef CHARGER_ENABLE_SUSPEND 244 static int request_suspend(bool enable) 245 { 246 if (enable) 247 return autosuspend_enable(); 248 else 249 return autosuspend_disable(); 250 } 251 #else 252 static int request_suspend(bool /*enable*/) 253 { 254 return 0; 255 } 256 #endif 257 258 static int draw_text(const char *str, int x, int y) 259 { 260 int str_len_px = gr_measure(str); 261 262 if (x < 0) 263 x = (gr_fb_width() - str_len_px) / 2; 264 if (y < 0) 265 y = (gr_fb_height() - char_height) / 2; 266 gr_text(x, y, str, 0); 267 268 return y + char_height; 269 } 270 271 static void android_green(void) 272 { 273 gr_color(0xa4, 0xc6, 0x39, 255); 274 } 275 276 /* returns the last y-offset of where the surface ends */ 277 static int draw_surface_centered(struct charger* /*charger*/, GRSurface* surface) 278 { 279 int w; 280 int h; 281 int x; 282 int y; 283 284 w = gr_get_width(surface); 285 h = gr_get_height(surface); 286 x = (gr_fb_width() - w) / 2 ; 287 y = (gr_fb_height() - h) / 2 ; 288 289 LOGV("drawing surface %dx%d+%d+%d\n", w, h, x, y); 290 gr_blit(surface, 0, 0, w, h, x, y); 291 return y + h; 292 } 293 294 static void draw_unknown(struct charger *charger) 295 { 296 int y; 297 if (charger->surf_unknown) { 298 draw_surface_centered(charger, charger->surf_unknown); 299 } else { 300 android_green(); 301 y = draw_text("Charging!", -1, -1); 302 draw_text("?\?/100", -1, y + 25); 303 } 304 } 305 306 static void draw_battery(struct charger *charger) 307 { 308 struct animation *batt_anim = charger->batt_anim; 309 struct frame *frame = &batt_anim->frames[batt_anim->cur_frame]; 310 311 if (batt_anim->num_frames != 0) { 312 draw_surface_centered(charger, frame->surface); 313 LOGV("drawing frame #%d min_cap=%d time=%d\n", 314 batt_anim->cur_frame, frame->min_capacity, 315 frame->disp_time); 316 } 317 } 318 319 static void redraw_screen(struct charger *charger) 320 { 321 struct animation *batt_anim = charger->batt_anim; 322 323 clear_screen(); 324 325 /* try to display *something* */ 326 if (batt_anim->capacity < 0 || batt_anim->num_frames == 0) 327 draw_unknown(charger); 328 else 329 draw_battery(charger); 330 gr_flip(); 331 } 332 333 static void kick_animation(struct animation *anim) 334 { 335 anim->run = true; 336 } 337 338 static void reset_animation(struct animation *anim) 339 { 340 anim->cur_cycle = 0; 341 anim->cur_frame = 0; 342 anim->run = false; 343 } 344 345 static void update_screen_state(struct charger *charger, int64_t now) 346 { 347 struct animation *batt_anim = charger->batt_anim; 348 int disp_time; 349 350 if (!batt_anim->run || now < charger->next_screen_transition) 351 return; 352 353 if (!minui_inited) { 354 355 if (healthd_config && healthd_config->screen_on) { 356 if (!healthd_config->screen_on(batt_prop)) { 357 LOGV("[%" PRId64 "] leave screen off\n", now); 358 batt_anim->run = false; 359 charger->next_screen_transition = -1; 360 if (charger->charger_connected) 361 request_suspend(true); 362 return; 363 } 364 } 365 366 gr_init(); 367 gr_font_size(&char_width, &char_height); 368 369 #ifndef CHARGER_DISABLE_INIT_BLANK 370 gr_fb_blank(true); 371 #endif 372 minui_inited = true; 373 } 374 375 /* animation is over, blank screen and leave */ 376 if (batt_anim->cur_cycle == batt_anim->num_cycles) { 377 reset_animation(batt_anim); 378 charger->next_screen_transition = -1; 379 gr_fb_blank(true); 380 LOGV("[%" PRId64 "] animation done\n", now); 381 if (charger->charger_connected) 382 request_suspend(true); 383 return; 384 } 385 386 disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time; 387 388 /* animation starting, set up the animation */ 389 if (batt_anim->cur_frame == 0) { 390 391 LOGV("[%" PRId64 "] animation starting\n", now); 392 if (batt_prop && batt_prop->batteryLevel >= 0 && batt_anim->num_frames != 0) { 393 int i; 394 395 /* find first frame given current capacity */ 396 for (i = 1; i < batt_anim->num_frames; i++) { 397 if (batt_prop->batteryLevel < batt_anim->frames[i].min_capacity) 398 break; 399 } 400 batt_anim->cur_frame = i - 1; 401 402 /* show the first frame for twice as long */ 403 disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time * 2; 404 } 405 if (batt_prop) 406 batt_anim->capacity = batt_prop->batteryLevel; 407 } 408 409 /* unblank the screen on first cycle */ 410 if (batt_anim->cur_cycle == 0) 411 gr_fb_blank(false); 412 413 /* draw the new frame (@ cur_frame) */ 414 redraw_screen(charger); 415 416 /* if we don't have anim frames, we only have one image, so just bump 417 * the cycle counter and exit 418 */ 419 if (batt_anim->num_frames == 0 || batt_anim->capacity < 0) { 420 LOGV("[%" PRId64 "] animation missing or unknown battery status\n", now); 421 charger->next_screen_transition = now + BATTERY_UNKNOWN_TIME; 422 batt_anim->cur_cycle++; 423 return; 424 } 425 426 /* schedule next screen transition */ 427 charger->next_screen_transition = now + disp_time; 428 429 /* advance frame cntr to the next valid frame only if we are charging 430 * if necessary, advance cycle cntr, and reset frame cntr 431 */ 432 if (charger->charger_connected) { 433 batt_anim->cur_frame++; 434 435 /* if the frame is used for level-only, that is only show it when it's 436 * the current level, skip it during the animation. 437 */ 438 while (batt_anim->cur_frame < batt_anim->num_frames && 439 batt_anim->frames[batt_anim->cur_frame].level_only) 440 batt_anim->cur_frame++; 441 if (batt_anim->cur_frame >= batt_anim->num_frames) { 442 batt_anim->cur_cycle++; 443 batt_anim->cur_frame = 0; 444 445 /* don't reset the cycle counter, since we use that as a signal 446 * in a test above to check if animation is over 447 */ 448 } 449 } else { 450 /* Stop animating if we're not charging. 451 * If we stop it immediately instead of going through this loop, then 452 * the animation would stop somewhere in the middle. 453 */ 454 batt_anim->cur_frame = 0; 455 batt_anim->cur_cycle++; 456 } 457 } 458 459 static int set_key_callback(int code, int value, void *data) 460 { 461 struct charger *charger = (struct charger *)data; 462 int64_t now = curr_time_ms(); 463 int down = !!value; 464 465 if (code > KEY_MAX) 466 return -1; 467 468 /* ignore events that don't modify our state */ 469 if (charger->keys[code].down == down) 470 return 0; 471 472 /* only record the down even timestamp, as the amount 473 * of time the key spent not being pressed is not useful */ 474 if (down) 475 charger->keys[code].timestamp = now; 476 charger->keys[code].down = down; 477 charger->keys[code].pending = true; 478 if (down) { 479 LOGV("[%" PRId64 "] key[%d] down\n", now, code); 480 } else { 481 int64_t duration = now - charger->keys[code].timestamp; 482 int64_t secs = duration / 1000; 483 int64_t msecs = duration - secs * 1000; 484 LOGV("[%" PRId64 "] key[%d] up (was down for %" PRId64 ".%" PRId64 "sec)\n", 485 now, code, secs, msecs); 486 } 487 488 return 0; 489 } 490 491 static void update_input_state(struct charger *charger, 492 struct input_event *ev) 493 { 494 if (ev->type != EV_KEY) 495 return; 496 set_key_callback(ev->code, ev->value, charger); 497 } 498 499 static void set_next_key_check(struct charger *charger, 500 struct key_state *key, 501 int64_t timeout) 502 { 503 int64_t then = key->timestamp + timeout; 504 505 if (charger->next_key_check == -1 || then < charger->next_key_check) 506 charger->next_key_check = then; 507 } 508 509 static void process_key(struct charger *charger, int code, int64_t now) 510 { 511 struct key_state *key = &charger->keys[code]; 512 513 if (code == KEY_POWER) { 514 if (key->down) { 515 int64_t reboot_timeout = key->timestamp + POWER_ON_KEY_TIME; 516 if (now >= reboot_timeout) { 517 /* We do not currently support booting from charger mode on 518 all devices. Check the property and continue booting or reboot 519 accordingly. */ 520 if (property_get_bool("ro.enable_boot_charger_mode", false)) { 521 LOGW("[%" PRId64 "] booting from charger mode\n", now); 522 property_set("sys.boot_from_charger_mode", "1"); 523 } else { 524 if (charger->batt_anim->capacity >= charger->boot_min_cap) { 525 LOGW("[%" PRId64 "] rebooting\n", now); 526 android_reboot(ANDROID_RB_RESTART, 0, 0); 527 } else { 528 LOGV("[%" PRId64 "] ignore power-button press, battery level " 529 "less than minimum\n", now); 530 } 531 } 532 } else { 533 /* if the key is pressed but timeout hasn't expired, 534 * make sure we wake up at the right-ish time to check 535 */ 536 set_next_key_check(charger, key, POWER_ON_KEY_TIME); 537 538 /* Turn on the display and kick animation on power-key press 539 * rather than on key release 540 */ 541 kick_animation(charger->batt_anim); 542 request_suspend(false); 543 } 544 } else { 545 /* if the power key got released, force screen state cycle */ 546 if (key->pending) { 547 kick_animation(charger->batt_anim); 548 } 549 } 550 } 551 552 key->pending = false; 553 } 554 555 static void handle_input_state(struct charger *charger, int64_t now) 556 { 557 process_key(charger, KEY_POWER, now); 558 559 if (charger->next_key_check != -1 && now > charger->next_key_check) 560 charger->next_key_check = -1; 561 } 562 563 static void handle_power_supply_state(struct charger *charger, int64_t now) 564 { 565 if (!charger->have_battery_state) 566 return; 567 568 if (!charger->charger_connected) { 569 570 /* Last cycle would have stopped at the extreme top of battery-icon 571 * Need to show the correct level corresponding to capacity. 572 */ 573 kick_animation(charger->batt_anim); 574 request_suspend(false); 575 if (charger->next_pwr_check == -1) { 576 charger->next_pwr_check = now + UNPLUGGED_SHUTDOWN_TIME; 577 LOGW("[%" PRId64 "] device unplugged: shutting down in %" PRId64 " (@ %" PRId64 ")\n", 578 now, (int64_t)UNPLUGGED_SHUTDOWN_TIME, charger->next_pwr_check); 579 } else if (now >= charger->next_pwr_check) { 580 LOGW("[%" PRId64 "] shutting down\n", now); 581 android_reboot(ANDROID_RB_POWEROFF, 0, 0); 582 } else { 583 /* otherwise we already have a shutdown timer scheduled */ 584 } 585 } else { 586 /* online supply present, reset shutdown timer if set */ 587 if (charger->next_pwr_check != -1) { 588 LOGW("[%" PRId64 "] device plugged in: shutdown cancelled\n", now); 589 kick_animation(charger->batt_anim); 590 } 591 charger->next_pwr_check = -1; 592 } 593 } 594 595 void healthd_mode_charger_heartbeat() 596 { 597 struct charger *charger = &charger_state; 598 int64_t now = curr_time_ms(); 599 600 handle_input_state(charger, now); 601 handle_power_supply_state(charger, now); 602 603 /* do screen update last in case any of the above want to start 604 * screen transitions (animations, etc) 605 */ 606 update_screen_state(charger, now); 607 } 608 609 void healthd_mode_charger_battery_update( 610 struct android::BatteryProperties *props) 611 { 612 struct charger *charger = &charger_state; 613 614 charger->charger_connected = 615 props->chargerAcOnline || props->chargerUsbOnline || 616 props->chargerWirelessOnline; 617 618 if (!charger->have_battery_state) { 619 charger->have_battery_state = true; 620 charger->next_screen_transition = curr_time_ms() - 1; 621 reset_animation(charger->batt_anim); 622 kick_animation(charger->batt_anim); 623 } 624 batt_prop = props; 625 } 626 627 int healthd_mode_charger_preparetowait(void) 628 { 629 struct charger *charger = &charger_state; 630 int64_t now = curr_time_ms(); 631 int64_t next_event = INT64_MAX; 632 int64_t timeout; 633 634 LOGV("[%" PRId64 "] next screen: %" PRId64 " next key: %" PRId64 " next pwr: %" PRId64 "\n", now, 635 charger->next_screen_transition, charger->next_key_check, 636 charger->next_pwr_check); 637 638 if (charger->next_screen_transition != -1) 639 next_event = charger->next_screen_transition; 640 if (charger->next_key_check != -1 && charger->next_key_check < next_event) 641 next_event = charger->next_key_check; 642 if (charger->next_pwr_check != -1 && charger->next_pwr_check < next_event) 643 next_event = charger->next_pwr_check; 644 645 if (next_event != -1 && next_event != INT64_MAX) 646 timeout = max(0, next_event - now); 647 else 648 timeout = -1; 649 650 return (int)timeout; 651 } 652 653 static int input_callback(int fd, unsigned int epevents, void *data) 654 { 655 struct charger *charger = (struct charger *)data; 656 struct input_event ev; 657 int ret; 658 659 ret = ev_get_input(fd, epevents, &ev); 660 if (ret) 661 return -1; 662 update_input_state(charger, &ev); 663 return 0; 664 } 665 666 static void charger_event_handler(uint32_t /*epevents*/) 667 { 668 int ret; 669 670 ret = ev_wait(-1); 671 if (!ret) 672 ev_dispatch(); 673 } 674 675 void healthd_mode_charger_init(struct healthd_config* config) 676 { 677 int ret; 678 struct charger *charger = &charger_state; 679 int i; 680 int epollfd; 681 682 dump_last_kmsg(); 683 684 LOGW("--------------- STARTING CHARGER MODE ---------------\n"); 685 686 ret = ev_init(input_callback, charger); 687 if (!ret) { 688 epollfd = ev_get_epollfd(); 689 healthd_register_event(epollfd, charger_event_handler); 690 } 691 692 ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown); 693 if (ret < 0) { 694 LOGE("Cannot load battery_fail image\n"); 695 charger->surf_unknown = NULL; 696 } 697 698 charger->batt_anim = &battery_animation; 699 700 GRSurface** scale_frames; 701 int scale_count; 702 ret = res_create_multi_display_surface("charger/battery_scale", &scale_count, &scale_frames); 703 if (ret < 0) { 704 LOGE("Cannot load battery_scale image\n"); 705 charger->batt_anim->num_frames = 0; 706 charger->batt_anim->num_cycles = 1; 707 } else if (scale_count != charger->batt_anim->num_frames) { 708 LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n", 709 scale_count, charger->batt_anim->num_frames); 710 charger->batt_anim->num_frames = 0; 711 charger->batt_anim->num_cycles = 1; 712 } else { 713 for (i = 0; i < charger->batt_anim->num_frames; i++) { 714 charger->batt_anim->frames[i].surface = scale_frames[i]; 715 } 716 } 717 718 ev_sync_key_state(set_key_callback, charger); 719 720 charger->next_screen_transition = -1; 721 charger->next_key_check = -1; 722 charger->next_pwr_check = -1; 723 healthd_config = config; 724 charger->boot_min_cap = config->boot_min_cap; 725 } 726
