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_get_endpoint(struct snd_usb_audio *chip,
   9                                               int ep_num);
  10
  11 int snd_usb_add_endpoint(struct snd_usb_audio *chip, int ep_num, int type);
  12
  13 struct snd_usb_endpoint *
  14 snd_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,
  18                       bool fixed_rate);
  19 void snd_usb_endpoint_close(struct snd_usb_audio *chip,
  20                             struct snd_usb_endpoint *ep);
  21 int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,
  22                                 struct snd_usb_endpoint *ep);
  23 int snd_usb_endpoint_prepare(struct snd_usb_audio *chip,
  24                              struct snd_usb_endpoint *ep);
  25 int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock);
  26
  27 bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,
  28                                  struct snd_usb_endpoint *ep,
  29                                  const struct audioformat *fp,
  30                                  const struct snd_pcm_hw_params *params);
  31
  32 void snd_usb_endpoint_set_sync(struct snd_usb_audio *chip,
  33                                struct snd_usb_endpoint *data_ep,
  34                                struct snd_usb_endpoint *sync_ep);
  35 void snd_usb_endpoint_set_callback(struct snd_usb_endpoint *ep,
  36                                    int (*prepare)(struct snd_usb_substream *subs,
  37                                                   struct urb *urb,
  38                                                   bool in_stream_lock),
  39                                    void (*retire)(struct snd_usb_substream *subs,
  40                                                   struct urb *urb),
  41                                    struct snd_usb_substream *data_subs);
  42
  43 int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
  44 void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep, bool keep_pending);
  45 void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
  46 void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep);
  47 void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
  48 void snd_usb_endpoint_free_all(struct snd_usb_audio *chip);
  49
  50 int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
  51 int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,
  52                                       struct snd_urb_ctx *ctx, int idx,
  53                                       unsigned int avail);
  54 int snd_usb_queue_pending_output_urbs(struct snd_usb_endpoint *ep,
  55                                       bool in_stream_lock);
  56
  57 #endif /* __USBAUDIO_ENDPOINT_H */