1c1b29826SPhilippe Mathieu-Daudé /* 2c1b29826SPhilippe Mathieu-Daudé * QEMU single LED device 3c1b29826SPhilippe Mathieu-Daudé * 4c1b29826SPhilippe Mathieu-Daudé * Copyright (C) 2020 Philippe Mathieu-Daudé <f4bug@amsat.org> 5c1b29826SPhilippe Mathieu-Daudé * 6c1b29826SPhilippe Mathieu-Daudé * SPDX-License-Identifier: GPL-2.0-or-later 7c1b29826SPhilippe Mathieu-Daudé */ 8c1b29826SPhilippe Mathieu-Daudé #include "qemu/osdep.h" 9c1b29826SPhilippe Mathieu-Daudé #include "qapi/error.h" 10c1b29826SPhilippe Mathieu-Daudé #include "migration/vmstate.h" 11c1b29826SPhilippe Mathieu-Daudé #include "hw/qdev-properties.h" 12c1b29826SPhilippe Mathieu-Daudé #include "hw/misc/led.h" 13*ddb67f64SPhilippe Mathieu-Daudé #include "hw/irq.h" 14c1b29826SPhilippe Mathieu-Daudé #include "trace.h" 15c1b29826SPhilippe Mathieu-Daudé 16c1b29826SPhilippe Mathieu-Daudé #define LED_INTENSITY_PERCENT_MAX 100 17c1b29826SPhilippe Mathieu-Daudé 18c1b29826SPhilippe Mathieu-Daudé static const char * const led_color_name[] = { 19c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_VIOLET] = "violet", 20c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_BLUE] = "blue", 21c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_CYAN] = "cyan", 22c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_GREEN] = "green", 23c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_AMBER] = "amber", 24c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_ORANGE] = "orange", 25c1b29826SPhilippe Mathieu-Daudé [LED_COLOR_RED] = "red", 26c1b29826SPhilippe Mathieu-Daudé }; 27c1b29826SPhilippe Mathieu-Daudé 28c1b29826SPhilippe Mathieu-Daudé static bool led_color_name_is_valid(const char *color_name) 29c1b29826SPhilippe Mathieu-Daudé { 30c1b29826SPhilippe Mathieu-Daudé for (size_t i = 0; i < ARRAY_SIZE(led_color_name); i++) { 31c1b29826SPhilippe Mathieu-Daudé if (strcmp(color_name, led_color_name[i]) == 0) { 32c1b29826SPhilippe Mathieu-Daudé return true; 33c1b29826SPhilippe Mathieu-Daudé } 34c1b29826SPhilippe Mathieu-Daudé } 35c1b29826SPhilippe Mathieu-Daudé return false; 36c1b29826SPhilippe Mathieu-Daudé } 37c1b29826SPhilippe Mathieu-Daudé 38c1b29826SPhilippe Mathieu-Daudé void led_set_intensity(LEDState *s, unsigned intensity_percent) 39c1b29826SPhilippe Mathieu-Daudé { 40c1b29826SPhilippe Mathieu-Daudé if (intensity_percent > LED_INTENSITY_PERCENT_MAX) { 41c1b29826SPhilippe Mathieu-Daudé intensity_percent = LED_INTENSITY_PERCENT_MAX; 42c1b29826SPhilippe Mathieu-Daudé } 43c1b29826SPhilippe Mathieu-Daudé trace_led_set_intensity(s->description, s->color, intensity_percent); 44c1b29826SPhilippe Mathieu-Daudé s->intensity_percent = intensity_percent; 45c1b29826SPhilippe Mathieu-Daudé } 46c1b29826SPhilippe Mathieu-Daudé 47c1b29826SPhilippe Mathieu-Daudé unsigned led_get_intensity(LEDState *s) 48c1b29826SPhilippe Mathieu-Daudé { 49c1b29826SPhilippe Mathieu-Daudé return s->intensity_percent; 50c1b29826SPhilippe Mathieu-Daudé } 51c1b29826SPhilippe Mathieu-Daudé 52c1b29826SPhilippe Mathieu-Daudé void led_set_state(LEDState *s, bool is_emitting) 53c1b29826SPhilippe Mathieu-Daudé { 54c1b29826SPhilippe Mathieu-Daudé led_set_intensity(s, is_emitting ? LED_INTENSITY_PERCENT_MAX : 0); 55c1b29826SPhilippe Mathieu-Daudé } 56c1b29826SPhilippe Mathieu-Daudé 57*ddb67f64SPhilippe Mathieu-Daudé static void led_set_state_gpio_handler(void *opaque, int line, int new_state) 58*ddb67f64SPhilippe Mathieu-Daudé { 59*ddb67f64SPhilippe Mathieu-Daudé LEDState *s = LED(opaque); 60*ddb67f64SPhilippe Mathieu-Daudé 61*ddb67f64SPhilippe Mathieu-Daudé assert(line == 0); 62*ddb67f64SPhilippe Mathieu-Daudé led_set_state(s, !!new_state != s->gpio_active_high); 63*ddb67f64SPhilippe Mathieu-Daudé } 64*ddb67f64SPhilippe Mathieu-Daudé 65c1b29826SPhilippe Mathieu-Daudé static void led_reset(DeviceState *dev) 66c1b29826SPhilippe Mathieu-Daudé { 67c1b29826SPhilippe Mathieu-Daudé LEDState *s = LED(dev); 68c1b29826SPhilippe Mathieu-Daudé 69*ddb67f64SPhilippe Mathieu-Daudé led_set_state(s, s->gpio_active_high); 70c1b29826SPhilippe Mathieu-Daudé } 71c1b29826SPhilippe Mathieu-Daudé 72c1b29826SPhilippe Mathieu-Daudé static const VMStateDescription vmstate_led = { 73c1b29826SPhilippe Mathieu-Daudé .name = TYPE_LED, 74c1b29826SPhilippe Mathieu-Daudé .version_id = 1, 75c1b29826SPhilippe Mathieu-Daudé .minimum_version_id = 1, 76c1b29826SPhilippe Mathieu-Daudé .fields = (VMStateField[]) { 77c1b29826SPhilippe Mathieu-Daudé VMSTATE_UINT8(intensity_percent, LEDState), 78c1b29826SPhilippe Mathieu-Daudé VMSTATE_END_OF_LIST() 79c1b29826SPhilippe Mathieu-Daudé } 80c1b29826SPhilippe Mathieu-Daudé }; 81c1b29826SPhilippe Mathieu-Daudé 82c1b29826SPhilippe Mathieu-Daudé static void led_realize(DeviceState *dev, Error **errp) 83c1b29826SPhilippe Mathieu-Daudé { 84c1b29826SPhilippe Mathieu-Daudé LEDState *s = LED(dev); 85c1b29826SPhilippe Mathieu-Daudé 86c1b29826SPhilippe Mathieu-Daudé if (s->color == NULL) { 87c1b29826SPhilippe Mathieu-Daudé error_setg(errp, "property 'color' not specified"); 88c1b29826SPhilippe Mathieu-Daudé return; 89c1b29826SPhilippe Mathieu-Daudé } else if (!led_color_name_is_valid(s->color)) { 90c1b29826SPhilippe Mathieu-Daudé error_setg(errp, "property 'color' invalid or not supported"); 91c1b29826SPhilippe Mathieu-Daudé return; 92c1b29826SPhilippe Mathieu-Daudé } 93c1b29826SPhilippe Mathieu-Daudé if (s->description == NULL) { 94c1b29826SPhilippe Mathieu-Daudé s->description = g_strdup("n/a"); 95c1b29826SPhilippe Mathieu-Daudé } 96*ddb67f64SPhilippe Mathieu-Daudé 97*ddb67f64SPhilippe Mathieu-Daudé qdev_init_gpio_in(DEVICE(s), led_set_state_gpio_handler, 1); 98c1b29826SPhilippe Mathieu-Daudé } 99c1b29826SPhilippe Mathieu-Daudé 100c1b29826SPhilippe Mathieu-Daudé static Property led_properties[] = { 101c1b29826SPhilippe Mathieu-Daudé DEFINE_PROP_STRING("color", LEDState, color), 102c1b29826SPhilippe Mathieu-Daudé DEFINE_PROP_STRING("description", LEDState, description), 103*ddb67f64SPhilippe Mathieu-Daudé DEFINE_PROP_BOOL("gpio-active-high", LEDState, gpio_active_high, true), 104c1b29826SPhilippe Mathieu-Daudé DEFINE_PROP_END_OF_LIST(), 105c1b29826SPhilippe Mathieu-Daudé }; 106c1b29826SPhilippe Mathieu-Daudé 107c1b29826SPhilippe Mathieu-Daudé static void led_class_init(ObjectClass *klass, void *data) 108c1b29826SPhilippe Mathieu-Daudé { 109c1b29826SPhilippe Mathieu-Daudé DeviceClass *dc = DEVICE_CLASS(klass); 110c1b29826SPhilippe Mathieu-Daudé 111c1b29826SPhilippe Mathieu-Daudé dc->desc = "LED"; 112c1b29826SPhilippe Mathieu-Daudé dc->vmsd = &vmstate_led; 113c1b29826SPhilippe Mathieu-Daudé dc->reset = led_reset; 114c1b29826SPhilippe Mathieu-Daudé dc->realize = led_realize; 115c1b29826SPhilippe Mathieu-Daudé set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories); 116c1b29826SPhilippe Mathieu-Daudé device_class_set_props(dc, led_properties); 117c1b29826SPhilippe Mathieu-Daudé } 118c1b29826SPhilippe Mathieu-Daudé 119c1b29826SPhilippe Mathieu-Daudé static const TypeInfo led_info = { 120c1b29826SPhilippe Mathieu-Daudé .name = TYPE_LED, 121c1b29826SPhilippe Mathieu-Daudé .parent = TYPE_DEVICE, 122c1b29826SPhilippe Mathieu-Daudé .instance_size = sizeof(LEDState), 123c1b29826SPhilippe Mathieu-Daudé .class_init = led_class_init 124c1b29826SPhilippe Mathieu-Daudé }; 125c1b29826SPhilippe Mathieu-Daudé 126c1b29826SPhilippe Mathieu-Daudé static void led_register_types(void) 127c1b29826SPhilippe Mathieu-Daudé { 128c1b29826SPhilippe Mathieu-Daudé type_register_static(&led_info); 129c1b29826SPhilippe Mathieu-Daudé } 130c1b29826SPhilippe Mathieu-Daudé 131c1b29826SPhilippe Mathieu-Daudé type_init(led_register_types) 132c1b29826SPhilippe Mathieu-Daudé 133c1b29826SPhilippe Mathieu-Daudé LEDState *led_create_simple(Object *parentobj, 134*ddb67f64SPhilippe Mathieu-Daudé GpioPolarity gpio_polarity, 135c1b29826SPhilippe Mathieu-Daudé LEDColor color, 136c1b29826SPhilippe Mathieu-Daudé const char *description) 137c1b29826SPhilippe Mathieu-Daudé { 138c1b29826SPhilippe Mathieu-Daudé g_autofree char *name = NULL; 139c1b29826SPhilippe Mathieu-Daudé DeviceState *dev; 140c1b29826SPhilippe Mathieu-Daudé 141c1b29826SPhilippe Mathieu-Daudé dev = qdev_new(TYPE_LED); 142*ddb67f64SPhilippe Mathieu-Daudé qdev_prop_set_bit(dev, "gpio-active-high", 143*ddb67f64SPhilippe Mathieu-Daudé gpio_polarity == GPIO_POLARITY_ACTIVE_HIGH); 144c1b29826SPhilippe Mathieu-Daudé qdev_prop_set_string(dev, "color", led_color_name[color]); 145c1b29826SPhilippe Mathieu-Daudé if (!description) { 146c1b29826SPhilippe Mathieu-Daudé static unsigned undescribed_led_id; 147c1b29826SPhilippe Mathieu-Daudé name = g_strdup_printf("undescribed-led-#%u", undescribed_led_id++); 148c1b29826SPhilippe Mathieu-Daudé } else { 149c1b29826SPhilippe Mathieu-Daudé qdev_prop_set_string(dev, "description", description); 150c1b29826SPhilippe Mathieu-Daudé name = g_ascii_strdown(description, -1); 151c1b29826SPhilippe Mathieu-Daudé name = g_strdelimit(name, " #", '-'); 152c1b29826SPhilippe Mathieu-Daudé } 153c1b29826SPhilippe Mathieu-Daudé object_property_add_child(parentobj, name, OBJECT(dev)); 154c1b29826SPhilippe Mathieu-Daudé qdev_realize_and_unref(dev, NULL, &error_fatal); 155c1b29826SPhilippe Mathieu-Daudé 156c1b29826SPhilippe Mathieu-Daudé return LED(dev); 157c1b29826SPhilippe Mathieu-Daudé } 158