Merge commit 'gnu/master' into test

[qemu] / hw / ssi.h

diff --git a/hw/ssi.h b/hw/ssi.h
new file mode 100644 (file)
index 0000000..861c484
--- /dev/null
+++ b/hw/ssi.h
@@ -0,0 +1,45 @@
+/* QEMU Synchronous Serial Interface support.  */
+
+/* In principle SSI is a point-point interface.  As such the qemu
+   implementation has a single slave device on a "bus".
+   However it is fairly common for boards to have multiple slaves
+   connected to a single master, and select devices with an external
+   chip select.  This is implemented in qemu by having an explicit mux device.
+   It is assumed that master and slave are both using the same transfer width.
+   */
+
+#ifndef QEMU_SSI_H
+#define QEMU_SSI_H
+
+#include "qdev.h"
+
+typedef struct SSISlave SSISlave;
+
+/* Slave devices.  */
+typedef struct {
+    DeviceInfo qdev;
+    void (*init)(SSISlave *dev);
+    uint32_t (*transfer)(SSISlave *dev, uint32_t val);
+} SSISlaveInfo;
+
+struct SSISlave {
+    DeviceState qdev;
+    SSISlaveInfo *info;
+};
+
+#define SSI_SLAVE_FROM_QDEV(dev) DO_UPCAST(SSISlave, qdev, dev)
+#define FROM_SSI_SLAVE(type, dev) DO_UPCAST(type, ssidev, dev)
+
+void ssi_register_slave(const char *name, int size, SSISlaveInfo *info);
+
+DeviceState *ssi_create_slave(SSIBus *bus, const char *name);
+
+/* Master interface.  */
+SSIBus *ssi_create_bus(DeviceState *parent, const char *name);
+
+uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
+
+/* max111x.c */
+void max111x_set_input(DeviceState *dev, int line, uint8_t value);
+
+#endif