/*
* Copyright (C) 2011-2013 The Android Open Source Project
*
* 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 <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <linux/input.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include <time.h>
#include <unistd.h>
#include <sys/socket.h>
#include <linux/netlink.h>
#include <batteryservice/BatteryService.h>
#include <cutils/android_reboot.h>
#include <cutils/klog.h>
#include <cutils/misc.h>
#include <cutils/uevent.h>
#include <cutils/properties.h>
#ifdef CHARGER_ENABLE_SUSPEND
#include <suspend/autosuspend.h>
#endif
#include "minui/minui.h"
#include <healthd/healthd.h>
char *locale;
#ifndef max
#define max(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#endif
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define MSEC_PER_SEC (1000LL)
#define NSEC_PER_MSEC (1000000LL)
#define BATTERY_UNKNOWN_TIME (2 * MSEC_PER_SEC)
#define POWER_ON_KEY_TIME (2 * MSEC_PER_SEC)
#define UNPLUGGED_SHUTDOWN_TIME (10 * MSEC_PER_SEC)
#define BATTERY_FULL_THRESH 95
#define LAST_KMSG_PATH "/proc/last_kmsg"
#define LAST_KMSG_PSTORE_PATH "/sys/fs/pstore/console-ramoops"
#define LAST_KMSG_MAX_SZ (32 * 1024)
#define LOGE(x...) do { KLOG_ERROR("charger", x); } while (0)
#define LOGW(x...) do { KLOG_WARNING("charger", x); } while (0)
#define LOGV(x...) do { KLOG_DEBUG("charger", x); } while (0)
struct key_state {
bool pending;
bool down;
int64_t timestamp;
};
struct frame {
int disp_time;
int min_capacity;
bool level_only;
GRSurface* surface;
};
struct animation {
bool run;
struct frame *frames;
int cur_frame;
int num_frames;
int cur_cycle;
int num_cycles;
/* current capacity being animated */
int capacity;
};
struct charger {
bool have_battery_state;
bool charger_connected;
int64_t next_screen_transition;
int64_t next_key_check;
int64_t next_pwr_check;
struct key_state keys[KEY_MAX + 1];
struct animation *batt_anim;
GRSurface* surf_unknown;
int boot_min_cap;
};
static struct frame batt_anim_frames[] = {
{
.disp_time = 750,
.min_capacity = 0,
.level_only = false,
.surface = NULL,
},
{
.disp_time = 750,
.min_capacity = 20,
.level_only = false,
.surface = NULL,
},
{
.disp_time = 750,
.min_capacity = 40,
.level_only = false,
.surface = NULL,
},
{
.disp_time = 750,
.min_capacity = 60,
.level_only = false,
.surface = NULL,
},
{
.disp_time = 750,
.min_capacity = 80,
.level_only = true,
.surface = NULL,
},
{
.disp_time = 750,
.min_capacity = BATTERY_FULL_THRESH,
.level_only = false,
.surface = NULL,
},
};
static struct animation battery_animation = {
.run = false,
.frames = batt_anim_frames,
.cur_frame = 0,
.num_frames = ARRAY_SIZE(batt_anim_frames),
.cur_cycle = 0,
.num_cycles = 3,
.capacity = 0,
};
static struct charger charger_state;
static struct healthd_config *healthd_config;
static struct android::BatteryProperties *batt_prop;
static int char_width;
static int char_height;
static bool minui_inited;
/* current time in milliseconds */
static int64_t curr_time_ms(void)
{
struct timespec tm;
clock_gettime(CLOCK_MONOTONIC, &tm);
return tm.tv_sec * MSEC_PER_SEC + (tm.tv_nsec / NSEC_PER_MSEC);
}
static void clear_screen(void)
{
gr_color(0, 0, 0, 255);
gr_clear();
}
#define MAX_KLOG_WRITE_BUF_SZ 256
static void dump_last_kmsg(void)
{
char *buf;
char *ptr;
unsigned sz = 0;
int len;
LOGW("\n");
LOGW("*************** LAST KMSG ***************\n");
LOGW("\n");
buf = (char *)load_file(LAST_KMSG_PSTORE_PATH, &sz);
if (!buf || !sz) {
buf = (char *)load_file(LAST_KMSG_PATH, &sz);
if (!buf || !sz) {
LOGW("last_kmsg not found. Cold reset?\n");
goto out;
}
}
len = min(sz, LAST_KMSG_MAX_SZ);
ptr = buf + (sz - len);
while (len > 0) {
int cnt = min(len, MAX_KLOG_WRITE_BUF_SZ);
char yoink;
char *nl;
nl = (char *)memrchr(ptr, '\n', cnt - 1);
if (nl)
cnt = nl - ptr + 1;
yoink = ptr[cnt];
ptr[cnt] = '\0';
klog_write(6, "<4>%s", ptr);
ptr[cnt] = yoink;
len -= cnt;
ptr += cnt;
}
free(buf);
out:
LOGW("\n");
LOGW("************* END LAST KMSG *************\n");
LOGW("\n");
}
#ifdef CHARGER_ENABLE_SUSPEND
static int request_suspend(bool enable)
{
if (enable)
return autosuspend_enable();
else
return autosuspend_disable();
}
#else
static int request_suspend(bool /*enable*/)
{
return 0;
}
#endif
static int draw_text(const char *str, int x, int y)
{
int str_len_px = gr_measure(str);
if (x < 0)
x = (gr_fb_width() - str_len_px) / 2;
if (y < 0)
y = (gr_fb_height() - char_height) / 2;
gr_text(x, y, str, 0);
return y + char_height;
}
static void android_green(void)
{
gr_color(0xa4, 0xc6, 0x39, 255);
}
/* returns the last y-offset of where the surface ends */
static int draw_surface_centered(struct charger* /*charger*/, GRSurface* surface)
{
int w;
int h;
int x;
int y;
w = gr_get_width(surface);
h = gr_get_height(surface);
x = (gr_fb_width() - w) / 2 ;
y = (gr_fb_height() - h) / 2 ;
LOGV("drawing surface %dx%d+%d+%d\n", w, h, x, y);
gr_blit(surface, 0, 0, w, h, x, y);
return y + h;
}
static void draw_unknown(struct charger *charger)
{
int y;
if (charger->surf_unknown) {
draw_surface_centered(charger, charger->surf_unknown);
} else {
android_green();
y = draw_text("Charging!", -1, -1);
draw_text("?\?/100", -1, y + 25);
}
}
static void draw_battery(struct charger *charger)
{
struct animation *batt_anim = charger->batt_anim;
struct frame *frame = &batt_anim->frames[batt_anim->cur_frame];
if (batt_anim->num_frames != 0) {
draw_surface_centered(charger, frame->surface);
LOGV("drawing frame #%d min_cap=%d time=%d\n",
batt_anim->cur_frame, frame->min_capacity,
frame->disp_time);
}
}
static void redraw_screen(struct charger *charger)
{
struct animation *batt_anim = charger->batt_anim;
clear_screen();
/* try to display *something* */
if (batt_anim->capacity < 0 || batt_anim->num_frames == 0)
draw_unknown(charger);
else
draw_battery(charger);
gr_flip();
}
static void kick_animation(struct animation *anim)
{
anim->run = true;
}
static void reset_animation(struct animation *anim)
{
anim->cur_cycle = 0;
anim->cur_frame = 0;
anim->run = false;
}
static void update_screen_state(struct charger *charger, int64_t now)
{
struct animation *batt_anim = charger->batt_anim;
int disp_time;
if (!batt_anim->run || now < charger->next_screen_transition)
return;
if (!minui_inited) {
if (healthd_config && healthd_config->screen_on) {
if (!healthd_config->screen_on(batt_prop)) {
LOGV("[%" PRId64 "] leave screen off\n", now);
batt_anim->run = false;
charger->next_screen_transition = -1;
if (charger->charger_connected)
request_suspend(true);
return;
}
}
gr_init();
gr_font_size(&char_width, &char_height);
#ifndef CHARGER_DISABLE_INIT_BLANK
gr_fb_blank(true);
#endif
minui_inited = true;
}
/* animation is over, blank screen and leave */
if (batt_anim->cur_cycle == batt_anim->num_cycles) {
reset_animation(batt_anim);
charger->next_screen_transition = -1;
gr_fb_blank(true);
LOGV("[%" PRId64 "] animation done\n", now);
if (charger->charger_connected)
request_suspend(true);
return;
}
disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time;
/* animation starting, set up the animation */
if (batt_anim->cur_frame == 0) {
LOGV("[%" PRId64 "] animation starting\n", now);
if (batt_prop && batt_prop->batteryLevel >= 0 && batt_anim->num_frames != 0) {
int i;
/* find first frame given current capacity */
for (i = 1; i < batt_anim->num_frames; i++) {
if (batt_prop->batteryLevel < batt_anim->frames[i].min_capacity)
break;
}
batt_anim->cur_frame = i - 1;
/* show the first frame for twice as long */
disp_time = batt_anim->frames[batt_anim->cur_frame].disp_time * 2;
}
if (batt_prop)
batt_anim->capacity = batt_prop->batteryLevel;
}
/* unblank the screen on first cycle */
if (batt_anim->cur_cycle == 0)
gr_fb_blank(false);
/* draw the new frame (@ cur_frame) */
redraw_screen(charger);
/* if we don't have anim frames, we only have one image, so just bump
* the cycle counter and exit
*/
if (batt_anim->num_frames == 0 || batt_anim->capacity < 0) {
LOGV("[%" PRId64 "] animation missing or unknown battery status\n", now);
charger->next_screen_transition = now + BATTERY_UNKNOWN_TIME;
batt_anim->cur_cycle++;
return;
}
/* schedule next screen transition */
charger->next_screen_transition = now + disp_time;
/* advance frame cntr to the next valid frame only if we are charging
* if necessary, advance cycle cntr, and reset frame cntr
*/
if (charger->charger_connected) {
batt_anim->cur_frame++;
/* if the frame is used for level-only, that is only show it when it's
* the current level, skip it during the animation.
*/
while (batt_anim->cur_frame < batt_anim->num_frames &&
batt_anim->frames[batt_anim->cur_frame].level_only)
batt_anim->cur_frame++;
if (batt_anim->cur_frame >= batt_anim->num_frames) {
batt_anim->cur_cycle++;
batt_anim->cur_frame = 0;
/* don't reset the cycle counter, since we use that as a signal
* in a test above to check if animation is over
*/
}
} else {
/* Stop animating if we're not charging.
* If we stop it immediately instead of going through this loop, then
* the animation would stop somewhere in the middle.
*/
batt_anim->cur_frame = 0;
batt_anim->cur_cycle++;
}
}
static int set_key_callback(int code, int value, void *data)
{
struct charger *charger = (struct charger *)data;
int64_t now = curr_time_ms();
int down = !!value;
if (code > KEY_MAX)
return -1;
/* ignore events that don't modify our state */
if (charger->keys[code].down == down)
return 0;
/* only record the down even timestamp, as the amount
* of time the key spent not being pressed is not useful */
if (down)
charger->keys[code].timestamp = now;
charger->keys[code].down = down;
charger->keys[code].pending = true;
if (down) {
LOGV("[%" PRId64 "] key[%d] down\n", now, code);
} else {
int64_t duration = now - charger->keys[code].timestamp;
int64_t secs = duration / 1000;
int64_t msecs = duration - secs * 1000;
LOGV("[%" PRId64 "] key[%d] up (was down for %" PRId64 ".%" PRId64 "sec)\n",
now, code, secs, msecs);
}
return 0;
}
static void update_input_state(struct charger *charger,
struct input_event *ev)
{
if (ev->type != EV_KEY)
return;
set_key_callback(ev->code, ev->value, charger);
}
static void set_next_key_check(struct charger *charger,
struct key_state *key,
int64_t timeout)
{
int64_t then = key->timestamp + timeout;
if (charger->next_key_check == -1 || then < charger->next_key_check)
charger->next_key_check = then;
}
static void process_key(struct charger *charger, int code, int64_t now)
{
struct key_state *key = &charger->keys[code];
if (code == KEY_POWER) {
if (key->down) {
int64_t reboot_timeout = key->timestamp + POWER_ON_KEY_TIME;
if (now >= reboot_timeout) {
/* We do not currently support booting from charger mode on
all devices. Check the property and continue booting or reboot
accordingly. */
if (property_get_bool("ro.enable_boot_charger_mode", false)) {
LOGW("[%" PRId64 "] booting from charger mode\n", now);
property_set("sys.boot_from_charger_mode", "1");
} else {
if (charger->batt_anim->capacity >= charger->boot_min_cap) {
LOGW("[%" PRId64 "] rebooting\n", now);
android_reboot(ANDROID_RB_RESTART, 0, 0);
} else {
LOGV("[%" PRId64 "] ignore power-button press, battery level "
"less than minimum\n", now);
}
}
} else {
/* if the key is pressed but timeout hasn't expired,
* make sure we wake up at the right-ish time to check
*/
set_next_key_check(charger, key, POWER_ON_KEY_TIME);
/* Turn on the display and kick animation on power-key press
* rather than on key release
*/
kick_animation(charger->batt_anim);
request_suspend(false);
}
} else {
/* if the power key got released, force screen state cycle */
if (key->pending) {
kick_animation(charger->batt_anim);
}
}
}
key->pending = false;
}
static void handle_input_state(struct charger *charger, int64_t now)
{
process_key(charger, KEY_POWER, now);
if (charger->next_key_check != -1 && now > charger->next_key_check)
charger->next_key_check = -1;
}
static void handle_power_supply_state(struct charger *charger, int64_t now)
{
if (!charger->have_battery_state)
return;
if (!charger->charger_connected) {
/* Last cycle would have stopped at the extreme top of battery-icon
* Need to show the correct level corresponding to capacity.
*/
kick_animation(charger->batt_anim);
request_suspend(false);
if (charger->next_pwr_check == -1) {
charger->next_pwr_check = now + UNPLUGGED_SHUTDOWN_TIME;
LOGW("[%" PRId64 "] device unplugged: shutting down in %" PRId64 " (@ %" PRId64 ")\n",
now, (int64_t)UNPLUGGED_SHUTDOWN_TIME, charger->next_pwr_check);
} else if (now >= charger->next_pwr_check) {
LOGW("[%" PRId64 "] shutting down\n", now);
android_reboot(ANDROID_RB_POWEROFF, 0, 0);
} else {
/* otherwise we already have a shutdown timer scheduled */
}
} else {
/* online supply present, reset shutdown timer if set */
if (charger->next_pwr_check != -1) {
LOGW("[%" PRId64 "] device plugged in: shutdown cancelled\n", now);
kick_animation(charger->batt_anim);
}
charger->next_pwr_check = -1;
}
}
void healthd_mode_charger_heartbeat()
{
struct charger *charger = &charger_state;
int64_t now = curr_time_ms();
handle_input_state(charger, now);
handle_power_supply_state(charger, now);
/* do screen update last in case any of the above want to start
* screen transitions (animations, etc)
*/
update_screen_state(charger, now);
}
void healthd_mode_charger_battery_update(
struct android::BatteryProperties *props)
{
struct charger *charger = &charger_state;
charger->charger_connected =
props->chargerAcOnline || props->chargerUsbOnline ||
props->chargerWirelessOnline;
if (!charger->have_battery_state) {
charger->have_battery_state = true;
charger->next_screen_transition = curr_time_ms() - 1;
reset_animation(charger->batt_anim);
kick_animation(charger->batt_anim);
}
batt_prop = props;
}
int healthd_mode_charger_preparetowait(void)
{
struct charger *charger = &charger_state;
int64_t now = curr_time_ms();
int64_t next_event = INT64_MAX;
int64_t timeout;
LOGV("[%" PRId64 "] next screen: %" PRId64 " next key: %" PRId64 " next pwr: %" PRId64 "\n", now,
charger->next_screen_transition, charger->next_key_check,
charger->next_pwr_check);
if (charger->next_screen_transition != -1)
next_event = charger->next_screen_transition;
if (charger->next_key_check != -1 && charger->next_key_check < next_event)
next_event = charger->next_key_check;
if (charger->next_pwr_check != -1 && charger->next_pwr_check < next_event)
next_event = charger->next_pwr_check;
if (next_event != -1 && next_event != INT64_MAX)
timeout = max(0, next_event - now);
else
timeout = -1;
return (int)timeout;
}
static int input_callback(int fd, unsigned int epevents, void *data)
{
struct charger *charger = (struct charger *)data;
struct input_event ev;
int ret;
ret = ev_get_input(fd, epevents, &ev);
if (ret)
return -1;
update_input_state(charger, &ev);
return 0;
}
static void charger_event_handler(uint32_t /*epevents*/)
{
int ret;
ret = ev_wait(-1);
if (!ret)
ev_dispatch();
}
void healthd_mode_charger_init(struct healthd_config* config)
{
int ret;
struct charger *charger = &charger_state;
int i;
int epollfd;
dump_last_kmsg();
LOGW("--------------- STARTING CHARGER MODE ---------------\n");
ret = ev_init(input_callback, charger);
if (!ret) {
epollfd = ev_get_epollfd();
healthd_register_event(epollfd, charger_event_handler);
}
ret = res_create_display_surface("charger/battery_fail", &charger->surf_unknown);
if (ret < 0) {
LOGE("Cannot load battery_fail image\n");
charger->surf_unknown = NULL;
}
charger->batt_anim = &battery_animation;
GRSurface** scale_frames;
int scale_count;
int scale_fps; // Not in use (charger/battery_scale doesn't have FPS text
// chunk). We are using hard-coded frame.disp_time instead.
ret = res_create_multi_display_surface("charger/battery_scale", &scale_count, &scale_fps,
&scale_frames);
if (ret < 0) {
LOGE("Cannot load battery_scale image\n");
charger->batt_anim->num_frames = 0;
charger->batt_anim->num_cycles = 1;
} else if (scale_count != charger->batt_anim->num_frames) {
LOGE("battery_scale image has unexpected frame count (%d, expected %d)\n",
scale_count, charger->batt_anim->num_frames);
charger->batt_anim->num_frames = 0;
charger->batt_anim->num_cycles = 1;
} else {
for (i = 0; i < charger->batt_anim->num_frames; i++) {
charger->batt_anim->frames[i].surface = scale_frames[i];
}
}
ev_sync_key_state(set_key_callback, charger);
charger->next_screen_transition = -1;
charger->next_key_check = -1;
charger->next_pwr_check = -1;
healthd_config = config;
charger->boot_min_cap = config->boot_min_cap;
}