Add MEN z125 UART over MEN Chameleon Bus emulation.
Acked-by: Alistair Francis <alistair.fran...@wdc.com>
Signed-off-by: Johannes Thumshirn <j...@kernel.org>
---
hw/char/Kconfig | 6 +++
hw/char/meson.build | 1 +
hw/char/serial-mcb.c | 115 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 122 insertions(+)
create mode 100644 hw/char/serial-mcb.c
diff --git a/hw/char/Kconfig b/hw/char/Kconfig
index 6b6cf2fc1d..9e8ebf1d3d 100644
--- a/hw/char/Kconfig
+++ b/hw/char/Kconfig
@@ -71,3 +71,9 @@ config GOLDFISH_TTY
config SHAKTI_UART
bool
+
+config SERIAL_MCB
+ bool
+ default y if MCB
+ depends on MCB
+ select SERIAL
diff --git a/hw/char/meson.build b/hw/char/meson.build
index e02c60dd54..d5893a142d 100644
--- a/hw/char/meson.build
+++ b/hw/char/meson.build
@@ -20,6 +20,7 @@ softmmu_ss.add(when: 'CONFIG_SHAKTI_UART', if_true:
files('shakti_uart.c'))
softmmu_ss.add(when: 'CONFIG_VIRTIO_SERIAL', if_true:
files('virtio-console.c'))
softmmu_ss.add(when: 'CONFIG_XEN_BUS', if_true: files('xen_console.c'))
softmmu_ss.add(when: 'CONFIG_XILINX', if_true: files('xilinx_uartlite.c'))
+softmmu_ss.add(when: 'CONFIG_SERIAL_MCB', if_true: files('serial-mcb.c'))
softmmu_ss.add(when: 'CONFIG_AVR_USART', if_true: files('avr_usart.c'))
softmmu_ss.add(when: 'CONFIG_COLDFIRE', if_true: files('mcf_uart.c'))
diff --git a/hw/char/serial-mcb.c b/hw/char/serial-mcb.c
new file mode 100644
index 0000000000..09f8fec11e
--- /dev/null
+++ b/hw/char/serial-mcb.c
@@ -0,0 +1,115 @@
+/*
+ * QEMU MEN 16z125 UART over MCB emulation
+ *
+ * Copyright (C) 2023 Johannes Thumshirn <j...@kernel.org>
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "hw/char/serial.h"
+#include "hw/mcb/mcb.h"
+#include "hw/irq.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-properties-system.h"
+#include "migration/vmstate.h"
+
+struct MCBSerialState {
+ MCBDevice dev;
+ SerialState state;
+};
+
+#define TYPE_MCB_SERIAL "mcb-serial"
+OBJECT_DECLARE_SIMPLE_TYPE(MCBSerialState, MCB_SERIAL)
+
+static void serial_mcb_realize(DeviceState *dev, Error **errp)
+{
+ MCBDevice *mdev = MCB_DEVICE(dev);
+ MCBSerialState *mss = DO_UPCAST(MCBSerialState, dev, mdev);
+ MCBus *bus = MCB_BUS(qdev_get_parent_bus(DEVICE(dev)));
+ SerialState *s = &mss->state;
+
+ mdev->gdd = mcb_new_chameleon_descriptor(bus, 125, mdev->rev,
+ mdev->var, 0x10);
+ if (!mdev->gdd) {
+ return;
+ }
+
+ s->baudbase = 115200;
+ if (!qdev_realize(DEVICE(s), NULL, errp)) {
+ return;
+ }
+
+ s->irq = mcb_allocate_irq(&mss->dev);
+ memory_region_init_io(&s->io, OBJECT(mss), &serial_io_ops, s, "serial", 8);
+ memory_region_add_subregion(&bus->mmio_region, mdev->gdd->offset, &s->io);
+}
+
+static void serial_mcb_unrealize(DeviceState *dev)
+{
+ MCBDevice *mdev = MCB_DEVICE(dev);
+ MCBSerialState *mss = DO_UPCAST(MCBSerialState, dev, mdev);
+ SerialState *s = &mss->state;
+
+ qdev_unrealize(DEVICE(s));
+ qemu_free_irq(s->irq);
+ g_free(&mdev->gdd);
+}
+
+static const VMStateDescription vmstate_mcb_serial = {
+ .name = "mcb-serial",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_MCB_DEVICE(dev, MCBSerialState),
+ VMSTATE_STRUCT(state, MCBSerialState, 0, vmstate_serial, SerialState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static Property serial_mcb_properties[] = {
+ DEFINE_PROP_UINT8("rev", MCBSerialState, dev.rev, 0),
+ DEFINE_PROP_UINT8("var", MCBSerialState, dev.var, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void serial_mcb_class_initfn(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ MCBDeviceClass *mc = MCB_DEVICE_CLASS(klass);
+
+ mc->realize = serial_mcb_realize;
+ mc->unrealize = serial_mcb_unrealize;
+
+ set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+ dc->desc = "MEN 16z125 UART over MCB";
+ dc->vmsd = &vmstate_mcb_serial;
+ device_class_set_props(dc, serial_mcb_properties);
+}
+
+static void serial_mcb_init(Object *o)
+{
+ MCBSerialState *mss = MCB_SERIAL(o);
+
+ object_initialize_child(o, "serial", &mss->state, TYPE_SERIAL);
+
+ qdev_alias_all_properties(DEVICE(&mss->state), o);
+}
+
+static const TypeInfo serial_mcb_info = {
+ .name = "mcb-serial",
+ .parent = TYPE_MCB_DEVICE,
+ .instance_size = sizeof(MCBSerialState),
+ .instance_init = serial_mcb_init,
+ .class_init = serial_mcb_class_initfn,
+};
+
+static void serial_mcb_register_types(void)
+{
+ type_register_static(&serial_mcb_info);
+}
+
+type_init(serial_mcb_register_types);
--
2.39.2
