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