1 files changed, 83 insertions, 0 deletions
diff --git a/include/mailbox_uclass.h b/include/mailbox_uclass.h
new file mode 100644
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+++ b/include/mailbox_uclass.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _MAILBOX_UCLASS_H
+#define _MAILBOX_UCLASS_H
+
+/* See mailbox_client.h for background documentation. */
+
+#include <mailbox_client.h>
+
+struct udevice;
+
+/**
+ * struct mbox_ops - The functions that a mailbox driver must implement.
+ */
+struct mbox_ops {
+	/**
+	 * of_xlate - Translate a client's device-tree (OF) mailbox specifier.
+	 *
+	 * The mailbox core calls this function as the first step in
+	 * implementing a client's mbox_get_by_*() call.
+	 *
+	 * If this function pointer is set to NULL, the mailbox core will use
+	 * a default implementation, which assumes #mbox-cells = <1>, and that
+	 * the DT cell contains a simple integer channel ID.
+	 *
+	 * At present, the mailbox API solely supports device-tree. If this
+	 * changes, other xxx_xlate() functions may be added to support those
+	 * other mechanisms.
+	 *
+	 * @chan:	The channel to hold the translation result.
+	 * @args:	The mailbox specifier values from device tree.
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*of_xlate)(struct mbox_chan *chan,
+			struct fdtdec_phandle_args *args);
+	/**
+	 * request - Request a translated channel.
+	 *
+	 * The mailbox core calls this function as the second step in
+	 * implementing a client's mbox_get_by_*() call, following a successful
+	 * xxx_xlate() call.
+	 *
+	 * @chan:	The channel to request; this has been filled in by a
+	 *		previoux xxx_xlate() function call.
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*request)(struct mbox_chan *chan);
+	/**
+	 * free - Free a previously requested channel.
+	 *
+	 * This is the implementation of the client mbox_free() API.
+	 *
+	 * @chan:	The channel to free.
+	 * @return 0 if OK, or a negative error code.
+	 */
+	int (*free)(struct mbox_chan *chan);
+	/**
+	* send - Send a message over a mailbox channel
+	*
+	* @chan:	The channel to send to the message to.
+	* @data:	A pointer to the message to send.
+	* @return 0 if OK, or a negative error code.
+	*/
+	int (*send)(struct mbox_chan *chan, const void *data);
+	/**
+	* recv - Receive any available message from the channel.
+	*
+	* This function does not block. If not message is immediately
+	* available, the function should return an error.
+	*
+	* @chan:	The channel to receive to the message from.
+	* @data:	A pointer to the buffer to hold the received message.
+	* @return 0 if OK, -ENODATA if no message was available, or a negative
+	* error code.
+	*/
+	int (*recv)(struct mbox_chan *chan, void *data);
+};
+
+#endif