1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Power and battery LED control for Falco.
*/
#include "battery.h"
#include "charge_state.h"
#include "chipset.h"
#include "extpower.h"
#include "gpio.h"
#include "hooks.h"
enum led_color {
LED_OFF = 0,
LED_WHITE,
LED_AMBER,
LED_COLOR_COUNT /* Number of colors, not a color itself */
};
static int bat_led_set_color(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_BAT_LED0, 1);
gpio_set_level(GPIO_BAT_LED1, 1);
break;
case LED_WHITE:
gpio_set_level(GPIO_BAT_LED0, 1);
gpio_set_level(GPIO_BAT_LED1, 0);
break;
case LED_AMBER:
gpio_set_level(GPIO_BAT_LED0, 0);
gpio_set_level(GPIO_BAT_LED1, 1);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static int pwr_led_set_color(enum led_color color)
{
switch (color) {
case LED_OFF:
gpio_set_level(GPIO_PWR_LED_L, 1);
break;
case LED_WHITE:
gpio_set_level(GPIO_PWR_LED_L, 0);
break;
default:
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
/* Called by hook task every 250mSec */
static void led_tick(void)
{
static int ticks;
uint32_t chflags = charge_get_flags();
ticks++;
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pwr_led_set_color(LED_OFF);
else if (chipset_in_state(CHIPSET_STATE_ON))
pwr_led_set_color(LED_WHITE);
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
pwr_led_set_color((ticks & 0x4) ? LED_WHITE : LED_OFF);
/* Battery LED is solid white if AC connected, unless the battery is
* is charging or there is an error. */
bat_led_set_color(extpower_is_present() ? LED_WHITE : LED_OFF);
switch (charge_get_state()) {
case PWR_STATE_CHARGE:
bat_led_set_color(LED_AMBER);
break;
case PWR_STATE_DISCHARGE:
/* See crosbug.com/p/22159. There's a 3% difference
* between the battery level seen by the kernel and what's
* really going on, so if they want to see 12%, we use 15%.
* Hard code this number here, because this only affects the
* LED color, not the battery charge state. */
if (charge_get_percent() < 15)
bat_led_set_color((ticks & 0x4) ? LED_WHITE : LED_OFF);
break;
case PWR_STATE_ERROR:
bat_led_set_color((ticks & 0x2) ? LED_WHITE : LED_OFF);
break;
case PWR_STATE_IDLE:
if (chflags & CHARGE_FLAG_FORCE_IDLE)
bat_led_set_color((ticks & 0x4) ? LED_AMBER : LED_OFF);
break;
default:
/* Other states don't alter LED behavior */
break;
}
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
|
