scsi: add topology support

[qemu.git] / hw / i2c.c

diff --git a/hw/i2c.c b/hw/i2c.c
index 1033e002443deedc505fe42148bf18b0f1350034..bee8e88c6bc38351de754c53005928b371e881d5 100644 (file)
--- a/hw/i2c.c
+++ b/hw/i2c.c
@@ -26,36 +26,43 @@ static struct BusInfo i2c_bus_info = {
     }
 };
 
-static void i2c_bus_save(QEMUFile *f, void *opaque)
+static void i2c_bus_pre_save(void *opaque)
 {
-    i2c_bus *bus = (i2c_bus *)opaque;
-    bus->saved_address = bus->current_dev ? bus->current_dev->address : -1;
+    i2c_bus *bus = opaque;
 
-    qemu_put_8s(f, &bus->saved_address);
+    bus->saved_address = bus->current_dev ? bus->current_dev->address : -1;
 }
 
-static int i2c_bus_load(QEMUFile *f, void *opaque, int version_id)
+static int i2c_bus_post_load(void *opaque, int version_id)
 {
-    i2c_bus *bus = (i2c_bus *)opaque;
-
-    if (version_id != 1)
-        return -EINVAL;
+    i2c_bus *bus = opaque;
 
     /* The bus is loaded before attached devices, so load and save the
        current device id.  Devices will check themselves as loaded.  */
-    qemu_get_8s(f, &bus->saved_address);
     bus->current_dev = NULL;
-
     return 0;
 }
 
+static const VMStateDescription vmstate_i2c_bus = {
+    .name = "i2c_bus",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .pre_save = i2c_bus_pre_save,
+    .post_load = i2c_bus_post_load,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINT8(saved_address, i2c_bus),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 /* Create a new I2C bus.  */
 i2c_bus *i2c_init_bus(DeviceState *parent, const char *name)
 {
     i2c_bus *bus;
 
     bus = FROM_QBUS(i2c_bus, qbus_create(&i2c_bus_info, parent, name));
-    register_savevm("i2c_bus", -1, 1, i2c_bus_save, i2c_bus_load, bus);
+    vmstate_register(-1, &vmstate_i2c_bus, bus);
     return bus;
 }
 
@@ -78,9 +85,11 @@ int i2c_start_transfer(i2c_bus *bus, uint8_t address, int recv)
     i2c_slave *slave = NULL;
 
     QLIST_FOREACH(qdev, &bus->qbus.children, sibling) {
-        slave = I2C_SLAVE_FROM_QDEV(qdev);
-        if (slave->address == address)
+        i2c_slave *candidate = I2C_SLAVE_FROM_QDEV(qdev);
+        if (candidate->address == address) {
+            slave = candidate;
             break;
+        }
     }
 
     if (!slave)
@@ -135,21 +144,29 @@ void i2c_nack(i2c_bus *bus)
     dev->info->event(dev, I2C_NACK);
 }
 
-void i2c_slave_save(QEMUFile *f, i2c_slave *dev)
-{
-    qemu_put_8s(f, &dev->address);
-}
-
-void i2c_slave_load(QEMUFile *f, i2c_slave *dev)
+static int i2c_slave_post_load(void *opaque, int version_id)
 {
+    i2c_slave *dev = opaque;
     i2c_bus *bus;
     bus = FROM_QBUS(i2c_bus, qdev_get_parent_bus(&dev->qdev));
-    qemu_get_8s(f, &dev->address);
     if (bus->saved_address == dev->address) {
         bus->current_dev = dev;
     }
+    return 0;
 }
 
+const VMStateDescription vmstate_i2c_slave = {
+    .name = "i2c_slave",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .post_load = i2c_slave_post_load,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINT8(address, i2c_slave),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static int i2c_slave_qdev_init(DeviceState *dev, DeviceInfo *base)
 {
     I2CSlaveInfo *info = container_of(base, I2CSlaveInfo, qdev);
@@ -174,6 +191,6 @@ DeviceState *i2c_create_slave(i2c_bus *bus, const char *name, uint8_t addr)
 
     dev = qdev_create(&bus->qbus, name);
     qdev_prop_set_uint8(dev, "address", addr);
-    qdev_init(dev);
+    qdev_init_nofail(dev);
     return dev;
 }