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i2c: smbus: convert to QEMU Object Model

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This converts two types because smbus is implemented as a subclass of i2c.  It's
extremely difficult to convert these two independently.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-12-04 20:39:20 -06:00
parent 9e07bdf816
commit b5ea932781
15 changed files with 332 additions and 165 deletions
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85
hw/i2c.c
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@ -83,6 +83,7 @@ int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv)
{
DeviceState *qdev;
I2CSlave *slave = NULL;
I2CSlaveClass *sc;
QTAILQ_FOREACH(qdev, &bus->qbus.children, sibling) {
I2CSlave *candidate = I2C_SLAVE_FROM_QDEV(qdev);
@ -92,24 +93,33 @@ int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv)
}
}
if (!slave)
if (!slave) {
return 1;
}
sc = I2C_SLAVE_GET_CLASS(slave);
/* If the bus is already busy, assume this is a repeated
start condition. */
bus->current_dev = slave;
slave->info->event(slave, recv ? I2C_START_RECV : I2C_START_SEND);
if (sc->event) {
sc->event(slave, recv ? I2C_START_RECV : I2C_START_SEND);
}
return 0;
}
void i2c_end_transfer(i2c_bus *bus)
{
I2CSlave *dev = bus->current_dev;
I2CSlaveClass *sc;
if (!dev)
if (!dev) {
return;
}
dev->info->event(dev, I2C_FINISH);
sc = I2C_SLAVE_GET_CLASS(dev);
if (sc->event) {
sc->event(dev, I2C_FINISH);
}
bus->current_dev = NULL;
}
@ -117,31 +127,50 @@ void i2c_end_transfer(i2c_bus *bus)
int i2c_send(i2c_bus *bus, uint8_t data)
{
I2CSlave *dev = bus->current_dev;
I2CSlaveClass *sc;
if (!dev)
if (!dev) {
return -1;
}
return dev->info->send(dev, data);
sc = I2C_SLAVE_GET_CLASS(dev);
if (sc->send) {
return sc->send(dev, data);
}
return -1;
}
int i2c_recv(i2c_bus *bus)
{
I2CSlave *dev = bus->current_dev;
I2CSlaveClass *sc;
if (!dev)
if (!dev) {
return -1;
}
return dev->info->recv(dev);
sc = I2C_SLAVE_GET_CLASS(dev);
if (sc->recv) {
return sc->recv(dev);
}
return -1;
}
void i2c_nack(i2c_bus *bus)
{
I2CSlave *dev = bus->current_dev;
I2CSlaveClass *sc;
if (!dev)
if (!dev) {
return;
}
dev->info->event(dev, I2C_NACK);
sc = I2C_SLAVE_GET_CLASS(dev);
if (sc->event) {
sc->event(dev, I2C_NACK);
}
}
static int i2c_slave_post_load(void *opaque, int version_id)
@ -169,20 +198,23 @@ const VMStateDescription vmstate_i2c_slave = {
static int i2c_slave_qdev_init(DeviceState *dev, DeviceInfo *base)
{
I2CSlaveInfo *info = container_of(base, I2CSlaveInfo, qdev);
I2CSlave *s = I2C_SLAVE_FROM_QDEV(dev);
I2CSlaveClass *sc = I2C_SLAVE_GET_CLASS(s);
s->info = info;
return info->init(s);
return sc->init(s);
}
void i2c_register_slave(I2CSlaveInfo *info)
void i2c_register_slave_subclass(DeviceInfo *info, const char *parent)
{
assert(info->qdev.size >= sizeof(I2CSlave));
info->qdev.init = i2c_slave_qdev_init;
info->qdev.bus_info = &i2c_bus_info;
qdev_register(&info->qdev);
assert(info->size >= sizeof(I2CSlave));
info->init = i2c_slave_qdev_init;
info->bus_info = &i2c_bus_info;
qdev_register_subclass(info, parent);
}
void i2c_register_slave(DeviceInfo *info)
{
i2c_register_slave_subclass(info, TYPE_I2C_SLAVE);
}
DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, uint8_t addr)
@ -194,3 +226,18 @@ DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, uint8_t addr)
qdev_init_nofail(dev);
return dev;
}
static TypeInfo i2c_slave_type_info = {
.name = TYPE_I2C_SLAVE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(I2CSlave),
.abstract = true,
.class_size = sizeof(I2CSlaveClass),
};
static void i2c_slave_register_devices(void)
{
type_register_static(&i2c_slave_type_info);
}
device_init(i2c_slave_register_devices);