1 files changed, 56 insertions, 0 deletions
diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h
new file mode 100644
index 000000000..0d74207ef
--- /dev/null
+++ b/include/hw/i2c/pm_smbus.h
@@ -0,0 +1,56 @@
+#ifndef PM_SMBUS_H
+#define PM_SMBUS_H
+
+#include "exec/memory.h"
+#include "hw/i2c/smbus_master.h"
+
+#define PM_SMBUS_MAX_MSG_SIZE 32
+
+typedef struct PMSMBus {
+    I2CBus *smbus;
+    MemoryRegion io;
+
+    uint8_t smb_stat;
+    uint8_t smb_ctl;
+    uint8_t smb_cmd;
+    uint8_t smb_addr;
+    uint8_t smb_data0;
+    uint8_t smb_data1;
+    uint8_t smb_data[PM_SMBUS_MAX_MSG_SIZE];
+    uint8_t smb_blkdata;
+    uint8_t smb_auxctl;
+    uint32_t smb_index;
+
+    /* Set by pm_smbus.c */
+    void (*reset)(struct PMSMBus *s);
+
+    /* Set by the user. */
+    bool i2c_enable;
+    void (*set_irq)(struct PMSMBus *s, bool enabled);
+    void *opaque;
+
+    /* Internally used by pm_smbus. */
+
+    /* Set on block transfers after the last byte has been read, so the
+       INTR bit can be set at the right time. */
+    bool op_done;
+
+    /* Set during an I2C block read, so we know how to handle data. */
+    bool in_i2c_block_read;
+
+    /* Used to work around a bug in AMIBIOS, see smb_transaction_start() */
+    bool start_transaction_on_status_read;
+} PMSMBus;
+
+void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);
+
+/*
+ * For backwards compatibility on migration, older versions don't have
+ * working migration for pm_smbus, this lets us ignore the migrations
+ * for older machine versions.
+ */
+bool pm_smbus_vmstate_needed(void);
+
+extern const VMStateDescription pmsmb_vmstate;
+
+#endif /* PM_SMBUS_H */