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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* 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.
*
* Battery LED control for Cranky
*/
#include "charge_state.h"
#include "chipset.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "pwm.h"
#include "util.h"
const enum ec_led_id supported_led_ids[] = {
EC_LED_ID_BATTERY_LED, EC_LED_ID_POWER_LED};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_BLUE_POWER_LED,
LED_RED,
LED_VIOLET,
LED_INDIGO,
LED_BLUE,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
/* Brightness vs. color, for {red, blue} LEDs */
static const uint8_t color_brightness[LED_COLOR_COUNT][2] = {
{0, 0},
{100, 0},
{100, 0},
{30, 45},
{20, 60},
{0, 100},
};
/**
* Set LED color
*
* @param color Enumerated color value
*/
static void set_color_battery_led(enum led_color color)
{
pwm_set_duty(PWM_CH_LED_RED, color_brightness[color][0]);
pwm_set_duty(PWM_CH_LED_BLUE, color_brightness[color][1]);
}
static void set_color_power_led(enum led_color color)
{
pwm_set_duty(PWM_CH_LED_BLUE_POWER_LED, color_brightness[color][0]);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
switch (led_id) {
case EC_LED_ID_BATTERY_LED:
brightness_range[EC_LED_COLOR_RED] = 100;
brightness_range[EC_LED_COLOR_BLUE] = 100;
break;
case EC_LED_ID_POWER_LED:
brightness_range[EC_LED_COLOR_BLUE] = 100;
break;
default:
/* Nothing to do */
break;
}
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
switch (led_id) {
case EC_LED_ID_BATTERY_LED:
pwm_set_duty(PWM_CH_LED_RED,
brightness[EC_LED_COLOR_RED]);
pwm_set_duty(PWM_CH_LED_BLUE,
brightness[EC_LED_COLOR_BLUE]);
break;
case EC_LED_ID_POWER_LED:
pwm_set_duty(PWM_CH_LED_BLUE_POWER_LED,
brightness[EC_LED_COLOR_BLUE]);
break;
default:
break;
}
return EC_SUCCESS;
}
static void led_init(void)
{
/* Configure GPIOs */
gpio_config_module(MODULE_PWM_LED, 1);
/*
* Enable PWMs and set to 0% duty cycle. If they're disabled, the LM4
* seems to ground the pins instead of letting them float.
*/
pwm_enable(PWM_CH_LED_RED, 1);
pwm_enable(PWM_CH_LED_BLUE, 1);
pwm_enable(PWM_CH_LED_BLUE_POWER_LED, 1);
set_color_battery_led(LED_OFF);
set_color_power_led(LED_OFF);
}
DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_DEFAULT);
/**
* Called by hook task every 250 ms
*/
static void power_led_tick(void)
{
static unsigned power_ticks;
static int previous_state_suspend;
power_ticks++;
/* If we don't control the LED, nothing to do */
if (!led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
return;
if (chipset_in_state(CHIPSET_STATE_ON)) {
set_color_power_led(LED_BLUE_POWER_LED);
} else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
if (!previous_state_suspend) {
previous_state_suspend = 1;
power_ticks = 0;
}
/* Flashing 1 sec on, 1 sec off */
set_color_power_led((power_ticks % 8) < 4 ?
LED_BLUE_POWER_LED : LED_OFF);
return;
} else {
set_color_power_led(LED_OFF);
}
previous_state_suspend = 0;
}
/**
* Called by hook task every 250 ms
*/
static void battery_led_tick(void)
{
static unsigned battery_ticks;
int chstate = charge_get_state();
battery_ticks++;
/* If we don't control the LED, nothing to do */
if (!led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
return;
/* If charging error, blink violet, 25% duty cycle, 4 sec period */
if (chstate == PWR_STATE_ERROR) {
set_color_battery_led((battery_ticks % 16) < 4 ?
LED_VIOLET : LED_OFF);
return;
}
/* If charge-force-idle, blink blue, 50% duty cycle, 2 sec period */
if (chstate == PWR_STATE_IDLE &&
(charge_get_flags() & CHARGE_FLAG_FORCE_IDLE)) {
set_color_battery_led((battery_ticks & 0x4) ?
LED_BLUE : LED_OFF);
return;
}
/* If the system is charging, solid violet */
if (chstate == PWR_STATE_CHARGE) {
set_color_battery_led(LED_VIOLET);
return;
}
/* If AC connected and fully charged (or close to it), solid blue */
if (chstate == PWR_STATE_CHARGE_NEAR_FULL ||
chstate == PWR_STATE_IDLE) {
set_color_battery_led(LED_BLUE);
return;
}
/* Otherwise, system is off and AC not connected, LED off */
set_color_battery_led(LED_OFF);
}
static void led_tick(void)
{
battery_led_tick();
power_led_tick();
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
|
