1 | /* SPDX-License-Identifier: GPL-2.0 OR MIT */ |
2 | |
3 | /* |
4 | * Xen para-virtual sound device |
5 | * |
6 | * Copyright (C) 2016-2018 EPAM Systems Inc. |
7 | * |
8 | * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> |
9 | */ |
10 | |
11 | #ifndef __XEN_SND_FRONT_H |
12 | #define __XEN_SND_FRONT_H |
13 | |
14 | #include "xen_snd_front_cfg.h" |
15 | |
16 | struct xen_snd_front_card_info; |
17 | struct xen_snd_front_evtchnl; |
18 | struct xen_snd_front_evtchnl_pair; |
19 | struct xen_front_pgdir_shbuf; |
20 | struct xensnd_query_hw_param; |
21 | |
22 | struct xen_snd_front_info { |
23 | struct xenbus_device *xb_dev; |
24 | |
25 | struct xen_snd_front_card_info *card_info; |
26 | |
27 | int num_evt_pairs; |
28 | struct xen_snd_front_evtchnl_pair *evt_pairs; |
29 | |
30 | struct xen_front_cfg_card cfg; |
31 | }; |
32 | |
33 | int xen_snd_front_stream_query_hw_param(struct xen_snd_front_evtchnl *evtchnl, |
34 | struct xensnd_query_hw_param *hw_param_req, |
35 | struct xensnd_query_hw_param *hw_param_resp); |
36 | |
37 | int xen_snd_front_stream_prepare(struct xen_snd_front_evtchnl *evtchnl, |
38 | struct xen_front_pgdir_shbuf *shbuf, |
39 | u8 format, unsigned int channels, |
40 | unsigned int rate, u32 buffer_sz, |
41 | u32 period_sz); |
42 | |
43 | int xen_snd_front_stream_close(struct xen_snd_front_evtchnl *evtchnl); |
44 | |
45 | int xen_snd_front_stream_write(struct xen_snd_front_evtchnl *evtchnl, |
46 | unsigned long pos, unsigned long count); |
47 | |
48 | int xen_snd_front_stream_read(struct xen_snd_front_evtchnl *evtchnl, |
49 | unsigned long pos, unsigned long count); |
50 | |
51 | int xen_snd_front_stream_trigger(struct xen_snd_front_evtchnl *evtchnl, |
52 | int type); |
53 | |
54 | #endif /* __XEN_SND_FRONT_H */ |
55 | |