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
|
/*
* QEMU single LED device
*
* Copyright (C) 2020 Philippe Mathieu-Daudé <f4bug@amsat.org>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "migration/vmstate.h"
#include "hw/qdev-properties.h"
#include "hw/misc/led.h"
#include "trace.h"
#define LED_INTENSITY_PERCENT_MAX 100
static const char * const led_color_name[] = {
[LED_COLOR_VIOLET] = "violet",
[LED_COLOR_BLUE] = "blue",
[LED_COLOR_CYAN] = "cyan",
[LED_COLOR_GREEN] = "green",
[LED_COLOR_YELLOW] = "yellow",
[LED_COLOR_AMBER] = "amber",
[LED_COLOR_ORANGE] = "orange",
[LED_COLOR_RED] = "red",
};
static bool led_color_name_is_valid(const char *color_name)
{
for (size_t i = 0; i < ARRAY_SIZE(led_color_name); i++) {
if (strcmp(color_name, led_color_name[i]) == 0) {
return true;
}
}
return false;
}
void led_set_intensity(LEDState *s, unsigned intensity_percent)
{
if (intensity_percent > LED_INTENSITY_PERCENT_MAX) {
intensity_percent = LED_INTENSITY_PERCENT_MAX;
}
trace_led_set_intensity(s->description, s->color, intensity_percent);
if (intensity_percent != s->intensity_percent) {
trace_led_change_intensity(s->description, s->color,
s->intensity_percent, intensity_percent);
}
s->intensity_percent = intensity_percent;
}
unsigned led_get_intensity(LEDState *s)
{
return s->intensity_percent;
}
void led_set_state(LEDState *s, bool is_emitting)
{
led_set_intensity(s, is_emitting ? LED_INTENSITY_PERCENT_MAX : 0);
}
static void led_set_state_gpio_handler(void *opaque, int line, int new_state)
{
LEDState *s = LED(opaque);
assert(line == 0);
led_set_state(s, !!new_state == s->gpio_active_high);
}
static void led_reset(DeviceState *dev)
{
LEDState *s = LED(dev);
led_set_state(s, s->gpio_active_high);
}
static const VMStateDescription vmstate_led = {
.name = TYPE_LED,
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(intensity_percent, LEDState),
VMSTATE_END_OF_LIST()
}
};
static void led_realize(DeviceState *dev, Error **errp)
{
LEDState *s = LED(dev);
if (s->color == NULL) {
error_setg(errp, "property 'color' not specified");
return;
} else if (!led_color_name_is_valid(s->color)) {
error_setg(errp, "property 'color' invalid or not supported");
return;
}
if (s->description == NULL) {
s->description = g_strdup("n/a");
}
qdev_init_gpio_in(DEVICE(s), led_set_state_gpio_handler, 1);
}
static Property led_properties[] = {
DEFINE_PROP_STRING("color", LEDState, color),
DEFINE_PROP_STRING("description", LEDState, description),
DEFINE_PROP_BOOL("gpio-active-high", LEDState, gpio_active_high, true),
DEFINE_PROP_END_OF_LIST(),
};
static void led_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "LED";
dc->vmsd = &vmstate_led;
dc->reset = led_reset;
dc->realize = led_realize;
set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
device_class_set_props(dc, led_properties);
}
static const TypeInfo led_info = {
.name = TYPE_LED,
.parent = TYPE_DEVICE,
.instance_size = sizeof(LEDState),
.class_init = led_class_init
};
static void led_register_types(void)
{
type_register_static(&led_info);
}
type_init(led_register_types)
LEDState *led_create_simple(Object *parentobj,
GpioPolarity gpio_polarity,
LEDColor color,
const char *description)
{
g_autofree char *name = NULL;
DeviceState *dev;
dev = qdev_new(TYPE_LED);
qdev_prop_set_bit(dev, "gpio-active-high",
gpio_polarity == GPIO_POLARITY_ACTIVE_HIGH);
qdev_prop_set_string(dev, "color", led_color_name[color]);
if (!description) {
static unsigned undescribed_led_id;
name = g_strdup_printf("undescribed-led-#%u", undescribed_led_id++);
} else {
qdev_prop_set_string(dev, "description", description);
name = g_ascii_strdown(description, -1);
name = g_strdelimit(name, " #", '-');
}
object_property_add_child(parentobj, name, OBJECT(dev));
qdev_realize_and_unref(dev, NULL, &error_fatal);
return LED(dev);
}
|
