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1 | 90d37239 | Paul Brook | /* QEMU Synchronous Serial Interface support. */
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2 | 90d37239 | Paul Brook | |
3 | 90d37239 | Paul Brook | /* In principle SSI is a point-point interface. As such the qemu
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4 | 90d37239 | Paul Brook | implementation has a single slave device on a "bus".
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5 | 90d37239 | Paul Brook | However it is fairly common for boards to have multiple slaves
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6 | 90d37239 | Paul Brook | connected to a single master, and select devices with an external
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7 | 90d37239 | Paul Brook | chip select. This is implemented in qemu by having an explicit mux device.
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8 | 90d37239 | Paul Brook | It is assumed that master and slave are both using the same transfer width.
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9 | 90d37239 | Paul Brook | */
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10 | 90d37239 | Paul Brook | |
11 | 90d37239 | Paul Brook | #ifndef QEMU_SSI_H
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12 | 90d37239 | Paul Brook | #define QEMU_SSI_H
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13 | 90d37239 | Paul Brook | |
14 | 90d37239 | Paul Brook | #include "qdev.h" |
15 | 90d37239 | Paul Brook | |
16 | 90d37239 | Paul Brook | typedef struct SSISlave SSISlave; |
17 | 90d37239 | Paul Brook | |
18 | cd6c4cf2 | Anthony Liguori | #define TYPE_SSI_SLAVE "ssi-slave" |
19 | cd6c4cf2 | Anthony Liguori | #define SSI_SLAVE(obj) \
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20 | cd6c4cf2 | Anthony Liguori | OBJECT_CHECK(SSISlave, (obj), TYPE_SSI_SLAVE) |
21 | cd6c4cf2 | Anthony Liguori | #define SSI_SLAVE_CLASS(klass) \
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22 | cd6c4cf2 | Anthony Liguori | OBJECT_CLASS_CHECK(SSISlaveClass, (klass), TYPE_SSI_SLAVE) |
23 | cd6c4cf2 | Anthony Liguori | #define SSI_SLAVE_GET_CLASS(obj) \
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24 | cd6c4cf2 | Anthony Liguori | OBJECT_GET_CLASS(SSISlaveClass, (obj), TYPE_SSI_SLAVE) |
25 | cd6c4cf2 | Anthony Liguori | |
26 | 90d37239 | Paul Brook | /* Slave devices. */
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27 | cd6c4cf2 | Anthony Liguori | typedef struct SSISlaveClass { |
28 | cd6c4cf2 | Anthony Liguori | DeviceClass parent_class; |
29 | cd6c4cf2 | Anthony Liguori | |
30 | 81a322d4 | Gerd Hoffmann | int (*init)(SSISlave *dev);
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31 | 90d37239 | Paul Brook | uint32_t (*transfer)(SSISlave *dev, uint32_t val); |
32 | cd6c4cf2 | Anthony Liguori | } SSISlaveClass; |
33 | 90d37239 | Paul Brook | |
34 | 90d37239 | Paul Brook | struct SSISlave {
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35 | 90d37239 | Paul Brook | DeviceState qdev; |
36 | 90d37239 | Paul Brook | }; |
37 | 90d37239 | Paul Brook | |
38 | 90d37239 | Paul Brook | #define SSI_SLAVE_FROM_QDEV(dev) DO_UPCAST(SSISlave, qdev, dev)
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39 | 90d37239 | Paul Brook | #define FROM_SSI_SLAVE(type, dev) DO_UPCAST(type, ssidev, dev)
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40 | 90d37239 | Paul Brook | |
41 | 90d37239 | Paul Brook | DeviceState *ssi_create_slave(SSIBus *bus, const char *name); |
42 | 90d37239 | Paul Brook | |
43 | 90d37239 | Paul Brook | /* Master interface. */
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44 | 02e2da45 | Paul Brook | SSIBus *ssi_create_bus(DeviceState *parent, const char *name); |
45 | 90d37239 | Paul Brook | |
46 | 90d37239 | Paul Brook | uint32_t ssi_transfer(SSIBus *bus, uint32_t val); |
47 | 90d37239 | Paul Brook | |
48 | a984a69e | Paul Brook | /* max111x.c */
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49 | a984a69e | Paul Brook | void max111x_set_input(DeviceState *dev, int line, uint8_t value); |
50 | a984a69e | Paul Brook | |
51 | 90d37239 | Paul Brook | #endif |