linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / ssi.h
1 /* QEMU Synchronous Serial Interface support. */
2
3 /* In principle SSI is a point-point interface. As such the qemu
4 implementation has a single slave device on a "bus".
5 However it is fairly common for boards to have multiple slaves
6 connected to a single master, and select devices with an external
7 chip select. This is implemented in qemu by having an explicit mux device.
8 It is assumed that master and slave are both using the same transfer width.
9 */
10
11 #ifndef QEMU_SSI_H
12 #define QEMU_SSI_H
13
14 #include "qdev.h"
15
16 typedef struct SSISlave SSISlave;
17
18 #define TYPE_SSI_SLAVE "ssi-slave"
19 #define SSI_SLAVE(obj) \
20 OBJECT_CHECK(SSISlave, (obj), TYPE_SSI_SLAVE)
21 #define SSI_SLAVE_CLASS(klass) \
22 OBJECT_CLASS_CHECK(SSISlaveClass, (klass), TYPE_SSI_SLAVE)
23 #define SSI_SLAVE_GET_CLASS(obj) \
24 OBJECT_GET_CLASS(SSISlaveClass, (obj), TYPE_SSI_SLAVE)
25
26 /* Slave devices. */
27 typedef struct SSISlaveClass {
28 DeviceClass parent_class;
29
30 int (*init)(SSISlave *dev);
31 uint32_t (*transfer)(SSISlave *dev, uint32_t val);
32 } SSISlaveClass;
33
34 struct SSISlave {
35 DeviceState qdev;
36 };
37
38 #define SSI_SLAVE_FROM_QDEV(dev) DO_UPCAST(SSISlave, qdev, dev)
39 #define FROM_SSI_SLAVE(type, dev) DO_UPCAST(type, ssidev, dev)
40
41 void ssi_register_slave(DeviceInfo *info);
42
43 DeviceState *ssi_create_slave(SSIBus *bus, const char *name);
44
45 /* Master interface. */
46 SSIBus *ssi_create_bus(DeviceState *parent, const char *name);
47
48 uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
49
50 /* max111x.c */
51 void max111x_set_input(DeviceState *dev, int line, uint8_t value);
52
53 #endif