A LED device can be connected to a GPIO output. Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> --- include/hw/misc/led.h | 30 ++++++++++++++++ hw/misc/led.c | 84 +++++++++++++++++++++++++++++++++++++++++++ MAINTAINERS | 6 ++++ hw/misc/Kconfig | 3 ++ hw/misc/Makefile.objs | 1 + hw/misc/trace-events | 3 ++ 6 files changed, 127 insertions(+) create mode 100644 include/hw/misc/led.h create mode 100644 hw/misc/led.c
diff --git a/include/hw/misc/led.h b/include/hw/misc/led.h new file mode 100644 index 0000000000..427ca1418e --- /dev/null +++ b/include/hw/misc/led.h @@ -0,0 +1,30 @@ +/* + * QEMU single LED device + * + * Copyright (C) 2020 Philippe Mathieu-Daudé <f4...@amsat.org> + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#ifndef HW_MISC_LED_H +#define HW_MISC_LED_H + +#include "hw/qdev-core.h" +#include "hw/sysbus.h" /* FIXME remove */ + +#define TYPE_LED "led" +#define LED(obj) OBJECT_CHECK(LEDState, (obj), TYPE_LED) + +typedef struct LEDState { + /* Private */ + SysBusDevice parent_obj; /* FIXME DeviceState */ + /* Public */ + + qemu_irq irq; + uint8_t current_state; + + /* Properties */ + char *name; + uint8_t reset_state; /* TODO [GPIO_ACTIVE_LOW, GPIO_ACTIVE_HIGH] */ +} LEDState; + +#endif /* HW_MISC_LED_H */ diff --git a/hw/misc/led.c b/hw/misc/led.c new file mode 100644 index 0000000000..1bae1a34c0 --- /dev/null +++ b/hw/misc/led.c @@ -0,0 +1,84 @@ +/* + * QEMU single LED device + * + * Copyright (C) 2020 Philippe Mathieu-Daudé <f4...@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 "hw/irq.h" +#include "trace.h" + +static void led_set(void *opaque, int line, int new_state) +{ + LEDState *s = LED(opaque); + + trace_led_set(s->name, s->current_state, new_state); + + s->current_state = new_state; +} + +static void led_reset(DeviceState *dev) +{ + LEDState *s = LED(dev); + + led_set(dev, 0, s->reset_state); +} + +static const VMStateDescription vmstate_led = { + .name = TYPE_LED, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT8(reset_state, LEDState), + VMSTATE_END_OF_LIST() + } +}; + +static void led_realize(DeviceState *dev, Error **errp) +{ + LEDState *s = LED(dev); + + if (s->name == NULL) { + error_setg(errp, "property 'name' not specified"); + return; + } + + qdev_init_gpio_in(DEVICE(s), led_set, 1); +} + +static Property led_properties[] = { + DEFINE_PROP_STRING("name", LEDState, name), + DEFINE_PROP_UINT8("reset_state", LEDState, reset_state, 0), + 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_SYS_BUS_DEVICE, /* FIXME 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) diff --git a/MAINTAINERS b/MAINTAINERS index 3abe3faa4e..10593863dc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1857,6 +1857,12 @@ F: docs/specs/vmgenid.txt F: tests/qtest/vmgenid-test.c F: stubs/vmgenid.c +LED +M: Philippe Mathieu-Daudé <f4...@amsat.org> +S: Maintained +F: include/hw/misc/led.h +F: hw/misc/led.c + Unimplemented device M: Peter Maydell <peter.mayd...@linaro.org> R: Philippe Mathieu-Daudé <f4...@amsat.org> diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig index bdd77d8020..f60dce694d 100644 --- a/hw/misc/Kconfig +++ b/hw/misc/Kconfig @@ -126,6 +126,9 @@ config AUX config UNIMP bool +config LED + bool + config MAC_VIA bool select MOS6522 diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs index 5aaca8a039..9efa3c941c 100644 --- a/hw/misc/Makefile.objs +++ b/hw/misc/Makefile.objs @@ -91,3 +91,4 @@ common-obj-$(CONFIG_NRF51_SOC) += nrf51_rng.o obj-$(CONFIG_MAC_VIA) += mac_via.o common-obj-$(CONFIG_GRLIB) += grlib_ahb_apb_pnp.o +common-obj-$(CONFIG_LED) += led.o diff --git a/hw/misc/trace-events b/hw/misc/trace-events index 5561746866..e15b7f7c81 100644 --- a/hw/misc/trace-events +++ b/hw/misc/trace-events @@ -206,3 +206,6 @@ via1_rtc_cmd_pram_sect_write(int sector, int offset, int addr, int value) "secto # grlib_ahb_apb_pnp.c grlib_ahb_pnp_read(uint64_t addr, uint32_t value) "AHB PnP read addr:0x%03"PRIx64" data:0x%08x" grlib_apb_pnp_read(uint64_t addr, uint32_t value) "APB PnP read addr:0x%03"PRIx64" data:0x%08x" + +# led.c +led_set(const char *name, uint8_t old_state, uint8_t new_state) "led name:'%s' state %d -> %d" -- 2.21.3