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-rw-r--r--sound/usb/endpoint.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
new file mode 100644
index 000000000..c09f68ce0
--- /dev/null
+++ b/sound/usb/endpoint.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __USBAUDIO_ENDPOINT_H
+#define __USBAUDIO_ENDPOINT_H
+
+#define SND_USB_ENDPOINT_TYPE_DATA 0
+#define SND_USB_ENDPOINT_TYPE_SYNC 1
+
+struct snd_usb_endpoint *snd_usb_get_endpoint(struct snd_usb_audio *chip,
+ int ep_num);
+
+int snd_usb_add_endpoint(struct snd_usb_audio *chip, int ep_num, int type);
+
+struct snd_usb_endpoint *
+snd_usb_endpoint_open(struct snd_usb_audio *chip,
+ const struct audioformat *fp,
+ const struct snd_pcm_hw_params *params,
+ bool is_sync_ep,
+ bool fixed_rate);
+void snd_usb_endpoint_close(struct snd_usb_audio *chip,
+ struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_set_params(struct snd_usb_audio *chip,
+ struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_prepare(struct snd_usb_audio *chip,
+ struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_get_clock_rate(struct snd_usb_audio *chip, int clock);
+
+bool snd_usb_endpoint_compatible(struct snd_usb_audio *chip,
+ struct snd_usb_endpoint *ep,
+ const struct audioformat *fp,
+ const struct snd_pcm_hw_params *params);
+
+void snd_usb_endpoint_set_sync(struct snd_usb_audio *chip,
+ struct snd_usb_endpoint *data_ep,
+ struct snd_usb_endpoint *sync_ep);
+void snd_usb_endpoint_set_callback(struct snd_usb_endpoint *ep,
+ int (*prepare)(struct snd_usb_substream *subs,
+ struct urb *urb,
+ bool in_stream_lock),
+ void (*retire)(struct snd_usb_substream *subs,
+ struct urb *urb),
+ struct snd_usb_substream *data_subs);
+
+int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep, bool keep_pending);
+void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_suspend(struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_release(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_free_all(struct snd_usb_audio *chip);
+
+int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *ctx, int idx,
+ unsigned int avail);
+int snd_usb_queue_pending_output_urbs(struct snd_usb_endpoint *ep,
+ bool in_stream_lock);
+
+#endif /* __USBAUDIO_ENDPOINT_H */