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0866aca1de
Make qbus children show up as link<> properties. There is no stable addressing for qbus children so we use an unstable naming convention. This is okay in QOM though because the composition name is expected to be what's stable. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/*
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* QEMU Synchronous Serial Interface support
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*
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* Copyright (c) 2009 CodeSourcery.
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* Written by Paul Brook
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*
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* This code is licensed under the GNU GPL v2.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "ssi.h"
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struct SSIBus {
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BusState qbus;
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};
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#define TYPE_SSI_BUS "SSI"
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#define SSI_BUS(obj) OBJECT_CHECK(SSIBus, (obj), TYPE_SSI_BUS)
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static const TypeInfo ssi_bus_info = {
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.name = TYPE_SSI_BUS,
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.parent = TYPE_BUS,
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.instance_size = sizeof(SSIBus),
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};
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static int ssi_slave_init(DeviceState *dev)
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{
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SSISlave *s = SSI_SLAVE(dev);
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SSISlaveClass *ssc = SSI_SLAVE_GET_CLASS(s);
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SSIBus *bus;
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BusChild *kid;
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bus = FROM_QBUS(SSIBus, qdev_get_parent_bus(dev));
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kid = QTAILQ_FIRST(&bus->qbus.children);
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if (kid->child != dev || QTAILQ_NEXT(kid, sibling) != NULL) {
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hw_error("Too many devices on SSI bus");
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}
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return ssc->init(s);
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}
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static void ssi_slave_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->init = ssi_slave_init;
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dc->bus_type = TYPE_SSI_BUS;
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}
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static TypeInfo ssi_slave_info = {
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.name = TYPE_SSI_SLAVE,
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.parent = TYPE_DEVICE,
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.class_init = ssi_slave_class_init,
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.class_size = sizeof(SSISlaveClass),
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.abstract = true,
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};
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DeviceState *ssi_create_slave(SSIBus *bus, const char *name)
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{
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DeviceState *dev;
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dev = qdev_create(&bus->qbus, name);
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qdev_init_nofail(dev);
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return dev;
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}
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SSIBus *ssi_create_bus(DeviceState *parent, const char *name)
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{
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BusState *bus;
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bus = qbus_create(TYPE_SSI_BUS, parent, name);
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return FROM_QBUS(SSIBus, bus);
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}
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uint32_t ssi_transfer(SSIBus *bus, uint32_t val)
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{
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BusChild *kid;
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SSISlave *slave;
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SSISlaveClass *ssc;
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kid = QTAILQ_FIRST(&bus->qbus.children);
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if (!kid) {
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return 0;
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}
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slave = SSI_SLAVE(kid->child);
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ssc = SSI_SLAVE_GET_CLASS(slave);
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return ssc->transfer(slave, val);
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}
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static void ssi_slave_register_types(void)
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{
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type_register_static(&ssi_bus_info);
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type_register_static(&ssi_slave_info);
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}
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type_init(ssi_slave_register_types)
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