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-rw-r--r--MAINTAINERS6
-rw-r--r--hw/arm/Kconfig2
-rw-r--r--hw/arm/aspeed.c20
-rw-r--r--hw/arm/tosa.c40
-rw-r--r--hw/misc/Kconfig5
-rw-r--r--hw/misc/led.c161
-rw-r--r--hw/misc/meson.build1
-rw-r--r--hw/misc/mps2-fpgaio.c23
-rw-r--r--hw/misc/mps2-scc.c27
-rw-r--r--hw/misc/trace-events6
-rw-r--r--include/hw/misc/led.h97
-rw-r--r--include/hw/misc/mps2-fpgaio.h2
-rw-r--r--include/hw/misc/mps2-scc.h2
-rw-r--r--include/hw/qdev-core.h16
14 files changed, 365 insertions, 43 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index ef6f5c7..7e442b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1967,6 +1967,12 @@ F: docs/specs/vmgenid.txt
F: tests/qtest/vmgenid-test.c
F: stubs/vmgenid.c
+LED
+M: Philippe Mathieu-Daudé <f4bug@amsat.org>
+S: Maintained
+F: include/hw/misc/led.h
+F: hw/misc/led.c
+
Unimplemented device
M: Peter Maydell <peter.maydell@linaro.org>
R: Philippe Mathieu-Daudé <f4bug@amsat.org>
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 7d04082..3c893e0 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -151,6 +151,7 @@ config TOSA
select ZAURUS # scoop
select MICRODRIVE
select PXA2XX
+ select LED
config SPITZ
bool
@@ -404,6 +405,7 @@ config ASPEED_SOC
select TMP105
select TMP421
select UNIMP
+ select LED
config MPS2
bool
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index bdb981d..0ef3f6b 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -20,6 +20,7 @@
#include "hw/i2c/smbus_eeprom.h"
#include "hw/misc/pca9552.h"
#include "hw/misc/tmp105.h"
+#include "hw/misc/led.h"
#include "hw/qdev-properties.h"
#include "qemu/log.h"
#include "sysemu/block-backend.h"
@@ -525,9 +526,20 @@ static void sonorapass_bmc_i2c_init(AspeedMachineState *bmc)
static void witherspoon_bmc_i2c_init(AspeedMachineState *bmc)
{
+ static const struct {
+ unsigned gpio_id;
+ LEDColor color;
+ const char *description;
+ bool gpio_polarity;
+ } pca1_leds[] = {
+ {13, LED_COLOR_GREEN, "front-fault-4", GPIO_POLARITY_ACTIVE_LOW},
+ {14, LED_COLOR_GREEN, "front-power-3", GPIO_POLARITY_ACTIVE_LOW},
+ {15, LED_COLOR_GREEN, "front-id-5", GPIO_POLARITY_ACTIVE_LOW},
+ };
AspeedSoCState *soc = &bmc->soc;
uint8_t *eeprom_buf = g_malloc0(8 * 1024);
DeviceState *dev;
+ LEDState *led;
/* Bus 3: TODO bmp280@77 */
/* Bus 3: TODO max31785@52 */
@@ -538,6 +550,14 @@ static void witherspoon_bmc_i2c_init(AspeedMachineState *bmc)
aspeed_i2c_get_bus(&soc->i2c, 3),
&error_fatal);
+ for (size_t i = 0; i < ARRAY_SIZE(pca1_leds); i++) {
+ led = led_create_simple(OBJECT(bmc),
+ pca1_leds[i].gpio_polarity,
+ pca1_leds[i].color,
+ pca1_leds[i].description);
+ qdev_connect_gpio_out(dev, pca1_leds[i].gpio_id,
+ qdev_get_gpio_in(DEVICE(led), 0));
+ }
i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 4), "tmp423", 0x4c);
i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 5), "tmp423", 0x4c);
diff --git a/hw/arm/tosa.c b/hw/arm/tosa.c
index c196f0d..fe88ed8 100644
--- a/hw/arm/tosa.c
+++ b/hw/arm/tosa.c
@@ -24,6 +24,7 @@
#include "hw/irq.h"
#include "hw/ssi/ssi.h"
#include "hw/sysbus.h"
+#include "hw/misc/led.h"
#include "exec/address-spaces.h"
#include "qom/object.h"
@@ -81,26 +82,6 @@ struct TosaMiscGPIOState {
SysBusDevice parent_obj;
};
-static void tosa_gpio_leds(void *opaque, int line, int level)
-{
- switch (line) {
- case 0:
- fprintf(stderr, "blue LED %s.\n", level ? "on" : "off");
- break;
- case 1:
- fprintf(stderr, "green LED %s.\n", level ? "on" : "off");
- break;
- case 2:
- fprintf(stderr, "amber LED %s.\n", level ? "on" : "off");
- break;
- case 3:
- fprintf(stderr, "wlan LED %s.\n", level ? "on" : "off");
- break;
- default:
- g_assert_not_reached();
- }
-}
-
static void tosa_reset(void *opaque, int line, int level)
{
if (level) {
@@ -112,7 +93,6 @@ static void tosa_misc_gpio_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
- qdev_init_gpio_in_named(dev, tosa_gpio_leds, "leds", 4);
qdev_init_gpio_in_named(dev, tosa_reset, "reset", 1);
}
@@ -122,6 +102,7 @@ static void tosa_gpio_setup(PXA2xxState *cpu,
TC6393xbState *tmio)
{
DeviceState *misc_gpio;
+ LEDState *led[4];
misc_gpio = sysbus_create_simple(TYPE_TOSA_MISC_GPIO, -1, NULL);
@@ -143,14 +124,23 @@ static void tosa_gpio_setup(PXA2xxState *cpu,
qdev_get_gpio_in(cpu->gpio, TOSA_GPIO_JC_CF_IRQ),
NULL);
+ led[0] = led_create_simple(OBJECT(misc_gpio), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_BLUE, "bluetooth");
+ led[1] = led_create_simple(OBJECT(misc_gpio), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_GREEN, "note");
+ led[2] = led_create_simple(OBJECT(misc_gpio), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_AMBER, "charger-error");
+ led[3] = led_create_simple(OBJECT(misc_gpio), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_GREEN, "wlan");
+
qdev_connect_gpio_out(scp1, TOSA_GPIO_BT_LED,
- qdev_get_gpio_in_named(misc_gpio, "leds", 0));
+ qdev_get_gpio_in(DEVICE(led[0]), 0));
qdev_connect_gpio_out(scp1, TOSA_GPIO_NOTE_LED,
- qdev_get_gpio_in_named(misc_gpio, "leds", 1));
+ qdev_get_gpio_in(DEVICE(led[1]), 0));
qdev_connect_gpio_out(scp1, TOSA_GPIO_CHRG_ERR_LED,
- qdev_get_gpio_in_named(misc_gpio, "leds", 2));
+ qdev_get_gpio_in(DEVICE(led[2]), 0));
qdev_connect_gpio_out(scp1, TOSA_GPIO_WLAN_LED,
- qdev_get_gpio_in_named(misc_gpio, "leds", 3));
+ qdev_get_gpio_in(DEVICE(led[3]), 0));
qdev_connect_gpio_out(scp1, TOSA_GPIO_TC6393XB_L3V_ON, tc6393xb_l3v_get(tmio));
diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
index 3185456..877ecff 100644
--- a/hw/misc/Kconfig
+++ b/hw/misc/Kconfig
@@ -93,9 +93,11 @@ config MIPS_ITU
config MPS2_FPGAIO
bool
+ select LED
config MPS2_SCC
bool
+ select LED
config TZ_MPC
bool
@@ -126,6 +128,9 @@ config AUX
config UNIMP
bool
+config LED
+ bool
+
config MAC_VIA
bool
select MOS6522
diff --git a/hw/misc/led.c b/hw/misc/led.c
new file mode 100644
index 0000000..5266d02
--- /dev/null
+++ b/hw/misc/led.c
@@ -0,0 +1,161 @@
+/*
+ * 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 "hw/irq.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_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 = (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);
+}
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 793d45b..aa8ec3b 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -11,6 +11,7 @@ softmmu_ss.add(when: 'CONFIG_TMP105', if_true: files('tmp105.c'))
softmmu_ss.add(when: 'CONFIG_TMP421', if_true: files('tmp421.c'))
softmmu_ss.add(when: 'CONFIG_UNIMP', if_true: files('unimp.c'))
softmmu_ss.add(when: 'CONFIG_EMPTY_SLOT', if_true: files('empty_slot.c'))
+softmmu_ss.add(when: 'CONFIG_LED', if_true: files('led.c'))
# ARM devices
softmmu_ss.add(when: 'CONFIG_PL310', if_true: files('arm_l2x0.c'))
diff --git a/hw/misc/mps2-fpgaio.c b/hw/misc/mps2-fpgaio.c
index 2f3fbee..6af0e8f 100644
--- a/hw/misc/mps2-fpgaio.c
+++ b/hw/misc/mps2-fpgaio.c
@@ -24,6 +24,7 @@
#include "migration/vmstate.h"
#include "hw/registerfields.h"
#include "hw/misc/mps2-fpgaio.h"
+#include "hw/misc/led.h"
#include "hw/qdev-properties.h"
#include "qemu/timer.h"
@@ -176,12 +177,9 @@ static void mps2_fpgaio_write(void *opaque, hwaddr offset, uint64_t value,
switch (offset) {
case A_LED0:
- /* LED bits [1:0] control board LEDs. We don't currently have
- * a mechanism for displaying this graphically, so use a trace event.
- */
- trace_mps2_fpgaio_leds(value & 0x02 ? '*' : '.',
- value & 0x01 ? '*' : '.');
s->led0 = value & 0x3;
+ led_set_state(s->led[0], value & 0x01);
+ led_set_state(s->led[1], value & 0x02);
break;
case A_PRESCALE:
resync_counter(s);
@@ -239,6 +237,10 @@ static void mps2_fpgaio_reset(DeviceState *dev)
s->counter = 0;
s->pscntr = 0;
s->pscntr_sync_ticks = now;
+
+ for (size_t i = 0; i < ARRAY_SIZE(s->led); i++) {
+ device_cold_reset(DEVICE(s->led[i]));
+ }
}
static void mps2_fpgaio_init(Object *obj)
@@ -251,6 +253,16 @@ static void mps2_fpgaio_init(Object *obj)
sysbus_init_mmio(sbd, &s->iomem);
}
+static void mps2_fpgaio_realize(DeviceState *dev, Error **errp)
+{
+ MPS2FPGAIO *s = MPS2_FPGAIO(dev);
+
+ s->led[0] = led_create_simple(OBJECT(dev), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_GREEN, "USERLED0");
+ s->led[1] = led_create_simple(OBJECT(dev), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_GREEN, "USERLED1");
+}
+
static bool mps2_fpgaio_counters_needed(void *opaque)
{
/* Currently vmstate.c insists all subsections have a 'needed' function */
@@ -299,6 +311,7 @@ static void mps2_fpgaio_class_init(ObjectClass *klass, void *data)
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &mps2_fpgaio_vmstate;
+ dc->realize = mps2_fpgaio_realize;
dc->reset = mps2_fpgaio_reset;
device_class_set_props(dc, mps2_fpgaio_properties);
}
diff --git a/hw/misc/mps2-scc.c b/hw/misc/mps2-scc.c
index 9d0909e..ce1dfe9 100644
--- a/hw/misc/mps2-scc.c
+++ b/hw/misc/mps2-scc.c
@@ -20,11 +20,13 @@
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
+#include "qemu/bitops.h"
#include "trace.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "hw/registerfields.h"
#include "hw/misc/mps2-scc.h"
+#include "hw/misc/led.h"
#include "hw/qdev-properties.h"
REG32(CFG0, 0)
@@ -152,18 +154,10 @@ static void mps2_scc_write(void *opaque, hwaddr offset, uint64_t value,
s->cfg0 = value;
break;
case A_CFG1:
- /* CFG1 bits [7:0] control the board LEDs. We don't currently have
- * a mechanism for displaying this graphically, so use a trace event.
- */
- trace_mps2_scc_leds(value & 0x80 ? '*' : '.',
- value & 0x40 ? '*' : '.',
- value & 0x20 ? '*' : '.',
- value & 0x10 ? '*' : '.',
- value & 0x08 ? '*' : '.',
- value & 0x04 ? '*' : '.',
- value & 0x02 ? '*' : '.',
- value & 0x01 ? '*' : '.');
s->cfg1 = value;
+ for (size_t i = 0; i < ARRAY_SIZE(s->led); i++) {
+ led_set_state(s->led[i], extract32(value, i, 1));
+ }
break;
case A_CFGDATA_OUT:
s->cfgdata_out = value;
@@ -236,6 +230,9 @@ static void mps2_scc_reset(DeviceState *dev)
for (i = 0; i < NUM_OSCCLK; i++) {
s->oscclk[i] = s->oscclk_reset[i];
}
+ for (i = 0; i < ARRAY_SIZE(s->led); i++) {
+ device_cold_reset(DEVICE(s->led[i]));
+ }
}
static void mps2_scc_init(Object *obj)
@@ -249,6 +246,14 @@ static void mps2_scc_init(Object *obj)
static void mps2_scc_realize(DeviceState *dev, Error **errp)
{
+ MPS2SCC *s = MPS2_SCC(dev);
+
+ for (size_t i = 0; i < ARRAY_SIZE(s->led); i++) {
+ char *name = g_strdup_printf("SCC LED%zu", i);
+ s->led[i] = led_create_simple(OBJECT(dev), GPIO_POLARITY_ACTIVE_HIGH,
+ LED_COLOR_GREEN, name);
+ g_free(name);
+ }
}
static const VMStateDescription mps2_scc_vmstate = {
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 6054f9a..c68811b 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -84,7 +84,6 @@ aspeed_scu_write(uint64_t offset, unsigned size, uint32_t data) "To 0x%" PRIx64
mps2_scc_read(uint64_t offset, uint64_t data, unsigned size) "MPS2 SCC read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
mps2_scc_write(uint64_t offset, uint64_t data, unsigned size) "MPS2 SCC write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
mps2_scc_reset(void) "MPS2 SCC: reset"
-mps2_scc_leds(char led7, char led6, char led5, char led4, char led3, char led2, char led1, char led0) "MPS2 SCC LEDs: %c%c%c%c%c%c%c%c"
mps2_scc_cfg_write(unsigned function, unsigned device, uint32_t value) "MPS2 SCC config write: function %d device %d data 0x%" PRIx32
mps2_scc_cfg_read(unsigned function, unsigned device, uint32_t value) "MPS2 SCC config read: function %d device %d data 0x%" PRIx32
@@ -92,7 +91,6 @@ mps2_scc_cfg_read(unsigned function, unsigned device, uint32_t value) "MPS2 SCC
mps2_fpgaio_read(uint64_t offset, uint64_t data, unsigned size) "MPS2 FPGAIO read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
mps2_fpgaio_write(uint64_t offset, uint64_t data, unsigned size) "MPS2 FPGAIO write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
mps2_fpgaio_reset(void) "MPS2 FPGAIO: reset"
-mps2_fpgaio_leds(char led1, char led0) "MPS2 FPGAIO LEDs: %c%c"
# msf2-sysreg.c
msf2_sysreg_write(uint64_t offset, uint32_t val, uint32_t prev) "msf2-sysreg write: addr 0x%08" PRIx64 " data 0x%" PRIx32 " prev 0x%" PRIx32
@@ -223,6 +221,10 @@ via1_adb_poll(uint8_t data, const char *vadbint, int status, int index, int size
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_intensity(const char *color, const char *desc, uint8_t intensity_percent) "LED desc:'%s' color:%s intensity: %u%%"
+led_change_intensity(const char *color, const char *desc, uint8_t old_intensity_percent, uint8_t new_intensity_percent) "LED desc:'%s' color:%s intensity %u%% -> %u%%"
+
# pca9552.c
pca955x_gpio_status(const char *description, const char *buf) "%s GPIOs 0-15 [%s]"
pca955x_gpio_change(const char *description, unsigned id, unsigned prev_state, unsigned current_state) "%s GPIO id:%u status: %u -> %u"
diff --git a/include/hw/misc/led.h b/include/hw/misc/led.h
new file mode 100644
index 0000000..aa359b8
--- /dev/null
+++ b/include/hw/misc/led.h
@@ -0,0 +1,97 @@
+/*
+ * QEMU single LED device
+ *
+ * Copyright (C) 2020 Philippe Mathieu-Daudé <f4bug@amsat.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef HW_MISC_LED_H
+#define HW_MISC_LED_H
+
+#include "qom/object.h"
+#include "hw/qdev-core.h"
+
+#define TYPE_LED "led"
+
+/**
+ * LEDColor: Color of a LED
+ *
+ * This set is restricted to physically available LED colors.
+ *
+ * LED colors from 'Table 1. Product performance of LUXEON Rebel Color
+ * Line' of the 'DS68 LUXEON Rebel Color Line' datasheet available at:
+ * https://www.lumileds.com/products/color-leds/luxeon-rebel-color/
+ */
+typedef enum { /* Coarse wavelength range */
+ LED_COLOR_VIOLET, /* 425 nm */
+ LED_COLOR_BLUE, /* 475 nm */
+ LED_COLOR_CYAN, /* 500 nm */
+ LED_COLOR_GREEN, /* 535 nm */
+ LED_COLOR_AMBER, /* 590 nm */
+ LED_COLOR_ORANGE, /* 615 nm */
+ LED_COLOR_RED, /* 630 nm */
+} LEDColor;
+
+struct LEDState {
+ /* Private */
+ DeviceState parent_obj;
+ /* Public */
+
+ uint8_t intensity_percent;
+ qemu_irq irq;
+
+ /* Properties */
+ char *description;
+ char *color;
+ /*
+ * Determines whether a GPIO is using a positive (active-high)
+ * logic (when used with GPIO, the intensity at reset is related
+ * to the GPIO polarity).
+ */
+ bool gpio_active_high;
+};
+typedef struct LEDState LEDState;
+DECLARE_INSTANCE_CHECKER(LEDState, LED, TYPE_LED)
+
+/**
+ * led_set_intensity: Set the intensity of a LED device
+ * @s: the LED object
+ * @intensity_percent: intensity as percentage in range 0 to 100.
+ */
+void led_set_intensity(LEDState *s, unsigned intensity_percent);
+
+/**
+ * led_get_intensity:
+ * @s: the LED object
+ *
+ * Returns: The LED intensity as percentage in range 0 to 100.
+ */
+unsigned led_get_intensity(LEDState *s);
+
+/**
+ * led_set_state: Set the state of a LED device
+ * @s: the LED object
+ * @is_emitting: boolean indicating whether the LED is emitting
+ *
+ * This utility is meant for LED connected to GPIO.
+ */
+void led_set_state(LEDState *s, bool is_emitting);
+
+/**
+ * led_create_simple: Create and realize a LED device
+ * @parentobj: the parent object
+ * @gpio_polarity: GPIO polarity
+ * @color: color of the LED
+ * @description: description of the LED (optional)
+ *
+ * Create the device state structure, initialize it, and
+ * drop the reference to it (the device is realized).
+ *
+ * Returns: The newly allocated and instantiated LED object.
+ */
+LEDState *led_create_simple(Object *parentobj,
+ GpioPolarity gpio_polarity,
+ LEDColor color,
+ const char *description);
+
+#endif /* HW_MISC_LED_H */
diff --git a/include/hw/misc/mps2-fpgaio.h b/include/hw/misc/mps2-fpgaio.h
index 80f9227..a010fdb 100644
--- a/include/hw/misc/mps2-fpgaio.h
+++ b/include/hw/misc/mps2-fpgaio.h
@@ -22,6 +22,7 @@
#define MPS2_FPGAIO_H
#include "hw/sysbus.h"
+#include "hw/misc/led.h"
#include "qom/object.h"
#define TYPE_MPS2_FPGAIO "mps2-fpgaio"
@@ -33,6 +34,7 @@ struct MPS2FPGAIO {
/*< public >*/
MemoryRegion iomem;
+ LEDState *led[2];
uint32_t led0;
uint32_t prescale;
diff --git a/include/hw/misc/mps2-scc.h b/include/hw/misc/mps2-scc.h
index e922b3c..f65d873 100644
--- a/include/hw/misc/mps2-scc.h
+++ b/include/hw/misc/mps2-scc.h
@@ -13,6 +13,7 @@
#define MPS2_SCC_H
#include "hw/sysbus.h"
+#include "hw/misc/led.h"
#include "qom/object.h"
#define TYPE_MPS2_SCC "mps2-scc"
@@ -26,6 +27,7 @@ struct MPS2SCC {
/*< public >*/
MemoryRegion iomem;
+ LEDState *led[8];
uint32_t cfg0;
uint32_t cfg1;
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 8689733..a653295 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -444,6 +444,22 @@ void qdev_machine_creation_done(void);
bool qdev_machine_modified(void);
/**
+ * GpioPolarity: Polarity of a GPIO line
+ *
+ * GPIO lines use either positive (active-high) logic,
+ * or negative (active-low) logic.
+ *
+ * In active-high logic (%GPIO_POLARITY_ACTIVE_HIGH), a pin is
+ * active when the voltage on the pin is high (relative to ground);
+ * whereas in active-low logic (%GPIO_POLARITY_ACTIVE_LOW), a pin
+ * is active when the voltage on the pin is low (or grounded).
+ */
+typedef enum {
+ GPIO_POLARITY_ACTIVE_LOW,
+ GPIO_POLARITY_ACTIVE_HIGH
+} GpioPolarity;
+
+/**
* qdev_get_gpio_in: Get one of a device's anonymous input GPIO lines
* @dev: Device whose GPIO we want
* @n: Number of the anonymous GPIO line (which must be in range)
generated by cgit v1.1 at 2024-11-03 10:17:38 +0000