mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 19:43:33 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2016, NVIDIA CORPORATION.
|
|
*/
|
|
|
|
#ifndef _MAILBOX_UCLASS_H
|
|
#define _MAILBOX_UCLASS_H
|
|
|
|
/* See mailbox.h for background documentation. */
|
|
|
|
#include <mailbox.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 ofnode_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);
|
|
/**
|
|
* rfree - 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 (*rfree)(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
|