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_get_endpoint(struct snd_usb_audio *chip,
   9                                              int ep_num);
  10
  11int snd_usb_add_endpoint(struct snd_usb_audio *chip, int ep_num, int type);
  12
  13struct snd_usb_endpoint *
  14snd_usb_endpoint_open(struct snd_usb_audio *chip,
  15                      const struct audioformat *fp,
  16                      const struct snd_pcm_hw_params *params,
  17                      bool is_sync_ep);
  18void snd_usb_endpoint_close(struct snd_usb_audio *chip,
  19                            struct snd_usb_endpoint *ep);
  20int snd_usb_endpoint_configure(struct snd_usb_audio *chip,
  21                               struct snd_usb_endpoint *ep);
  22
  23bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,
  24                                 struct snd_usb_endpoint *ep,
  25                                 const struct audioformat *fp,
  26                                 const struct snd_pcm_hw_params *params);
  27
  28void snd_usb_endpoint_set_sync(struct snd_usb_audio *chip,
  29                               struct snd_usb_endpoint *data_ep,
  30                               struct snd_usb_endpoint *sync_ep);
  31void snd_usb_endpoint_set_callback(struct snd_usb_endpoint *ep,
  32                                   void (*prepare)(struct snd_usb_substream *subs,
  33                                                   struct urb *urb),
  34                                   void (*retire)(struct snd_usb_substream *subs,
  35                                                  struct urb *urb),
  36                                   struct snd_usb_substream *data_subs);
  37
  38int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
  39void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep);
  40void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
  41void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep);
  42int  snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
  43void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
  44void snd_usb_endpoint_free_all(struct snd_usb_audio *chip);
  45
  46int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
  47int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,
  48                                      struct snd_urb_ctx *ctx, int idx);
  49
  50#endif /* __USBAUDIO_ENDPOINT_H */
  51