mirror of https://github.com/OpenIPC/firmware.git
86 lines
2.2 KiB
Diff
86 lines
2.2 KiB
Diff
--- linux-4.9.37/drivers/usb/gadget/function/u_uac1_legacy.h 1970-01-01 03:00:00.000000000 +0300
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+++ linux-4.9.y/drivers/usb/gadget/function/u_uac1_legacy.h 2021-06-07 13:01:34.000000000 +0300
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@@ -0,0 +1,82 @@
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+/*
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+ * u_uac1.c -- ALSA audio utilities for Gadget stack
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+ *
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+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
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+ * Copyright (C) 2008 Analog Devices, Inc
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+ *
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+ * Enter bugs at http://blackfin.uclinux.org/
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+ *
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+ * Licensed under the GPL-2 or later.
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+ */
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+
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+#ifndef __U_UAC1_LEGACY_H
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+#define __U_UAC1_LEGACY_H
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+
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+#include <linux/device.h>
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+#include <linux/err.h>
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+#include <linux/usb/audio.h>
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+#include <linux/usb/composite.h>
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+
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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+
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+#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p"
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+#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c"
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+#define FILE_CONTROL "/dev/snd/controlC0"
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+
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+#define UAC1_OUT_EP_MAX_PACKET_SIZE 200
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+#define UAC1_REQ_COUNT 256
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+#define UAC1_AUDIO_BUF_SIZE 48000
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+
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+/*
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+ * This represents the USB side of an audio card device, managed by a USB
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+ * function which provides control and stream interfaces.
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+ */
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+
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+struct gaudio_snd_dev {
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+ struct gaudio *card;
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+ struct file *filp;
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+ struct snd_pcm_substream *substream;
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+ int access;
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+ int format;
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+ int channels;
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+ int rate;
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+};
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+
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+struct gaudio {
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+ struct usb_function func;
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+ struct usb_gadget *gadget;
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+
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+ /* ALSA sound device interfaces */
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+ struct gaudio_snd_dev control;
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+ struct gaudio_snd_dev playback;
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+ struct gaudio_snd_dev capture;
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+
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+ /* TODO */
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+};
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+
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+struct f_uac1_legacy_opts {
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+ struct usb_function_instance func_inst;
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+ int req_buf_size;
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+ int req_count;
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+ int audio_buf_size;
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+ char *fn_play;
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+ char *fn_cap;
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+ char *fn_cntl;
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+ unsigned bound:1;
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+ unsigned fn_play_alloc:1;
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+ unsigned fn_cap_alloc:1;
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+ unsigned fn_cntl_alloc:1;
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+ struct mutex lock;
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+ int refcnt;
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+};
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+
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+int gaudio_setup(struct gaudio *card);
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+void gaudio_cleanup(struct gaudio *the_card);
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+
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+size_t u_audio_playback(struct gaudio *card, void *buf, size_t count);
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+int u_audio_get_playback_channels(struct gaudio *card);
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+int u_audio_get_playback_rate(struct gaudio *card);
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+
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+#endif /* __U_UAC1_LEGACY_H */
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