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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/usb/endpoint.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#ifndef __USBAUDIO_ENDPOINT_H

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#define __USBAUDIO_ENDPOINT_H

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#define SND_USB_ENDPOINT_TYPE_DATA     0

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#define SND_USB_ENDPOINT_TYPE_SYNC     1

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struct snd_usb_endpoint *snd_usb_get_endpoint(struct snd_usb_audio *chip,

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					      int ep_num);

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int snd_usb_add_endpoint(struct snd_usb_audio *chip, int ep_num, int type);

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struct snd_usb_endpoint *

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snd_usb_endpoint_open(struct snd_usb_audio *chip,

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		      const struct audioformat *fp,

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		      const struct snd_pcm_hw_params *params,

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		      bool is_sync_ep,

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		      bool fixed_rate);

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void snd_usb_endpoint_close(struct snd_usb_audio *chip,

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			    struct snd_usb_endpoint *ep);

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int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,

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				struct snd_usb_endpoint *ep);

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int snd_usb_endpoint_prepare(struct snd_usb_audio *chip,

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			     struct snd_usb_endpoint *ep);

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int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock);

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bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,

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				 struct snd_usb_endpoint *ep,

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				 const struct audioformat *fp,

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				 const struct snd_pcm_hw_params *params);

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void snd_usb_endpoint_set_sync(struct snd_usb_audio *chip,

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			       struct snd_usb_endpoint *data_ep,

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			       struct snd_usb_endpoint *sync_ep);

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void snd_usb_endpoint_set_callback(struct snd_usb_endpoint *ep,

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				   int (*prepare)(struct snd_usb_substream *subs,

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						  struct urb *urb,

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						  bool in_stream_lock),

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				   void (*retire)(struct snd_usb_substream *subs,

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						  struct urb *urb),

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				   struct snd_usb_substream *data_subs);

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int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);

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void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep, bool keep_pending);

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void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);

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void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep);

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void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);

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void snd_usb_endpoint_free_all(struct snd_usb_audio *chip);

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int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);

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int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,

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				      struct snd_urb_ctx *ctx, int idx,

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				      unsigned int avail);

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int snd_usb_queue_pending_output_urbs(struct snd_usb_endpoint *ep,

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				      bool in_stream_lock);

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#endif /* __USBAUDIO_ENDPOINT_H */

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