ssi.c
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/*
* QEMU Synchronous Serial Interface support
*
* Copyright (c) 2009 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GNU GPL v2.
*/
#include "ssi.h"
struct SSIBus {
SSISlave *slave;
};
static void ssi_slave_init(DeviceState *dev, void *opaque)
{
SSISlaveInfo *info = opaque;
SSISlave *s = SSI_SLAVE_FROM_QDEV(dev);
SSIBus *bus = qdev_get_bus(dev);
bus->slave = s;
s->info = info;
info->init(s);
}
void ssi_register_slave(const char *name, int size, SSISlaveInfo *info)
{
assert(size >= sizeof(SSISlave));
qdev_register(name, size, ssi_slave_init, info);
}
DeviceState *ssi_create_slave(SSIBus *bus, const char *name)
{
DeviceState *dev;
dev = qdev_create(bus, name);
qdev_init(dev);
return dev;
}
SSIBus *ssi_create_bus(void)
{
return qemu_mallocz(sizeof(SSIBus));
}
uint32_t ssi_transfer(SSIBus *bus, uint32_t val)
{
if (!bus->slave) {
return 0;
}
return bus->slave->info->transfer(bus->slave, val);
}