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
   8 struct 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
  12 int 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
  22 int  snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
  23 void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep);
  24 void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
  25 int  snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
  26 void snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
  27 void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
  28 void snd_usb_endpoint_free(struct snd_usb_endpoint *ep);
  29
  30 int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
  31 int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep);
  32 int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep);
  33
  34 void 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 */