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Merge remote-tracking branch 'kraxel/usb.31' into staging
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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
16typedef struct SSISlave SSISlave;
17
18/* Slave devices. */
19typedef struct {
02e2da45 20 DeviceInfo qdev;
81a322d4 21 int (*init)(SSISlave *dev);
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22 uint32_t (*transfer)(SSISlave *dev, uint32_t val);
23} SSISlaveInfo;
24
25struct SSISlave {
26 DeviceState qdev;
27 SSISlaveInfo *info;
28};
29
30#define SSI_SLAVE_FROM_QDEV(dev) DO_UPCAST(SSISlave, qdev, dev)
31#define FROM_SSI_SLAVE(type, dev) DO_UPCAST(type, ssidev, dev)
32
074f2fff 33void ssi_register_slave(SSISlaveInfo *info);
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34
35DeviceState *ssi_create_slave(SSIBus *bus, const char *name);
36
37/* Master interface. */
02e2da45 38SSIBus *ssi_create_bus(DeviceState *parent, const char *name);
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39
40uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
41
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42/* max111x.c */
43void max111x_set_input(DeviceState *dev, int line, uint8_t value);
44
90d37239 45#endif