LXR linux/sound/usb/endpoint.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __USBAUDIO_ENDPOINT_H
   3#define __USBAUDIO_ENDPOINT_H
   4
   5#define SND_USB_ENDPOINT_TYPE_DATA     0
   6#define SND_USB_ENDPOINT_TYPE_SYNC     1
   7
   8struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
   9                                              struct usb_host_interface *alts,
  10                                              int ep_num, int direction, int type);
  11
  12int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
  13                                snd_pcm_format_t pcm_format,
  14                                unsigned int channels,
  15                                unsigned int period_bytes,
  16                                unsigned int period_frames,
  17                                unsigned int buffer_periods,
  18                                unsigned int rate,
  19                                struct audioformat *fmt,
  20                                struct snd_usb_endpoint *sync_ep);
  21
  22int  snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
  23void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep);
  24void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
  25int  snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
  26void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
  27void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
  28void snd_usb_endpoint_free(struct snd_usb_endpoint *ep);
  29
  30int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
  31int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep);
  32int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep);
  33
  34void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
  35                             struct snd_usb_endpoint *sender,
  36                             const struct urb *urb);
  37
  38#endif /* __USBAUDIO_ENDPOINT_H */
  39