forked from mirrors/linux
dfabde206a
This patch supplies a new framework API; mbox_request_channel_byname(). It works by supplying the usual client pointer as the first argument and a string as the second. The API will search the client's node for a 'mbox-names' property then request a channel in the normal way using the requested string's index as the expected second 'index' argument. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/*
|
|
* Copyright (C) 2013-2014 Linaro Ltd.
|
|
* Author: Jassi Brar <jassisinghbrar@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __MAILBOX_CLIENT_H
|
|
#define __MAILBOX_CLIENT_H
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/device.h>
|
|
|
|
struct mbox_chan;
|
|
|
|
/**
|
|
* struct mbox_client - User of a mailbox
|
|
* @dev: The client device
|
|
* @tx_block: If the mbox_send_message should block until data is
|
|
* transmitted.
|
|
* @tx_tout: Max block period in ms before TX is assumed failure
|
|
* @knows_txdone: If the client could run the TX state machine. Usually
|
|
* if the client receives some ACK packet for transmission.
|
|
* Unused if the controller already has TX_Done/RTR IRQ.
|
|
* @rx_callback: Atomic callback to provide client the data received
|
|
* @tx_prepare: Atomic callback to ask client to prepare the payload
|
|
* before initiating the transmission if required.
|
|
* @tx_done: Atomic callback to tell client of data transmission
|
|
*/
|
|
struct mbox_client {
|
|
struct device *dev;
|
|
bool tx_block;
|
|
unsigned long tx_tout;
|
|
bool knows_txdone;
|
|
|
|
void (*rx_callback)(struct mbox_client *cl, void *mssg);
|
|
void (*tx_prepare)(struct mbox_client *cl, void *mssg);
|
|
void (*tx_done)(struct mbox_client *cl, void *mssg, int r);
|
|
};
|
|
|
|
struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
|
|
const char *name);
|
|
struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index);
|
|
int mbox_send_message(struct mbox_chan *chan, void *mssg);
|
|
void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */
|
|
bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */
|
|
void mbox_free_channel(struct mbox_chan *chan); /* may sleep */
|
|
|
|
#endif /* __MAILBOX_CLIENT_H */
|