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1 | /* |
2 | * Copyright (C) 2013-2014 Linaro Ltd. | |
3 | * Author: Jassi Brar <jassisinghbrar@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #ifndef __MAILBOX_CLIENT_H | |
11 | #define __MAILBOX_CLIENT_H | |
12 | ||
13 | #include <linux/of.h> | |
14 | #include <linux/device.h> | |
15 | ||
16 | struct mbox_chan; | |
17 | ||
18 | /** | |
19 | * struct mbox_client - User of a mailbox | |
20 | * @dev: The client device | |
21 | * @tx_block: If the mbox_send_message should block until data is | |
22 | * transmitted. | |
23 | * @tx_tout: Max block period in ms before TX is assumed failure | |
24 | * @knows_txdone: If the client could run the TX state machine. Usually | |
25 | * if the client receives some ACK packet for transmission. | |
26 | * Unused if the controller already has TX_Done/RTR IRQ. | |
27 | * @rx_callback: Atomic callback to provide client the data received | |
28 | * @tx_done: Atomic callback to tell client of data transmission | |
29 | */ | |
30 | struct mbox_client { | |
31 | struct device *dev; | |
32 | bool tx_block; | |
33 | unsigned long tx_tout; | |
34 | bool knows_txdone; | |
35 | ||
36 | void (*rx_callback)(struct mbox_client *cl, void *mssg); | |
37 | void (*tx_done)(struct mbox_client *cl, void *mssg, int r); | |
38 | }; | |
39 | ||
40 | struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index); | |
41 | int mbox_send_message(struct mbox_chan *chan, void *mssg); | |
42 | void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */ | |
43 | bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */ | |
44 | void mbox_free_channel(struct mbox_chan *chan); /* may sleep */ | |
45 | ||
46 | #endif /* __MAILBOX_CLIENT_H */ |