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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /include/sound/rawmidi.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/sound/rawmidi.h')
-rw-r--r--include/sound/rawmidi.h192
1 files changed, 192 insertions, 0 deletions
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
new file mode 100644
index 0000000000..f31cabf015
--- /dev/null
+++ b/include/sound/rawmidi.h
@@ -0,0 +1,192 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_RAWMIDI_H
+#define __SOUND_RAWMIDI_H
+
+/*
+ * Abstract layer for MIDI v1.0 stream
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <sound/asound.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+
+#if IS_ENABLED(CONFIG_SND_SEQUENCER)
+#include <sound/seq_device.h>
+#endif
+#include <sound/info.h>
+
+/*
+ * Raw MIDI interface
+ */
+
+#define SNDRV_RAWMIDI_DEVICES 8
+
+#define SNDRV_RAWMIDI_LFLG_OUTPUT (1<<0)
+#define SNDRV_RAWMIDI_LFLG_INPUT (1<<1)
+#define SNDRV_RAWMIDI_LFLG_OPEN (3<<0)
+#define SNDRV_RAWMIDI_LFLG_APPEND (1<<2)
+
+struct snd_rawmidi;
+struct snd_rawmidi_substream;
+struct snd_seq_port_info;
+struct pid;
+
+struct snd_rawmidi_ops {
+ int (*open) (struct snd_rawmidi_substream * substream);
+ int (*close) (struct snd_rawmidi_substream * substream);
+ void (*trigger) (struct snd_rawmidi_substream * substream, int up);
+ void (*drain) (struct snd_rawmidi_substream * substream);
+};
+
+struct snd_rawmidi_global_ops {
+ int (*dev_register) (struct snd_rawmidi * rmidi);
+ int (*dev_unregister) (struct snd_rawmidi * rmidi);
+ void (*get_port_info)(struct snd_rawmidi *rmidi, int number,
+ struct snd_seq_port_info *info);
+ long (*ioctl)(struct snd_rawmidi *rmidi, unsigned int cmd,
+ void __user *argp);
+ void (*proc_read)(struct snd_info_entry *entry,
+ struct snd_info_buffer *buf);
+};
+
+struct snd_rawmidi_runtime {
+ struct snd_rawmidi_substream *substream;
+ unsigned int drain: 1, /* drain stage */
+ oss: 1; /* OSS compatible mode */
+ /* midi stream buffer */
+ unsigned char *buffer; /* buffer for MIDI data */
+ size_t buffer_size; /* size of buffer */
+ size_t appl_ptr; /* application pointer */
+ size_t hw_ptr; /* hardware pointer */
+ size_t avail_min; /* min avail for wakeup */
+ size_t avail; /* max used buffer for wakeup */
+ size_t xruns; /* over/underruns counter */
+ size_t align; /* alignment (0 = byte stream, 3 = UMP) */
+ int buffer_ref; /* buffer reference count */
+ /* misc */
+ wait_queue_head_t sleep;
+ /* event handler (new bytes, input only) */
+ void (*event)(struct snd_rawmidi_substream *substream);
+ /* defers calls to event [input] or ops->trigger [output] */
+ struct work_struct event_work;
+ /* private data */
+ void *private_data;
+ void (*private_free)(struct snd_rawmidi_substream *substream);
+};
+
+struct snd_rawmidi_substream {
+ struct list_head list; /* list of all substream for given stream */
+ int stream; /* direction */
+ int number; /* substream number */
+ bool opened; /* open flag */
+ bool append; /* append flag (merge more streams) */
+ bool active_sensing; /* send active sensing when close */
+ unsigned int framing; /* whether to frame input data */
+ unsigned int clock_type; /* clock source to use for input framing */
+ int use_count; /* use counter (for output) */
+ size_t bytes;
+ spinlock_t lock;
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_str *pstr;
+ char name[32];
+ struct snd_rawmidi_runtime *runtime;
+ struct pid *pid;
+ /* hardware layer */
+ const struct snd_rawmidi_ops *ops;
+};
+
+struct snd_rawmidi_file {
+ struct snd_rawmidi *rmidi;
+ struct snd_rawmidi_substream *input;
+ struct snd_rawmidi_substream *output;
+ unsigned int user_pversion; /* supported protocol version */
+};
+
+struct snd_rawmidi_str {
+ unsigned int substream_count;
+ unsigned int substream_opened;
+ struct list_head substreams;
+};
+
+struct snd_rawmidi {
+ struct snd_card *card;
+ struct list_head list;
+ unsigned int device; /* device number */
+ unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
+ char id[64];
+ char name[80];
+
+#ifdef CONFIG_SND_OSSEMUL
+ int ossreg;
+#endif
+
+ const struct snd_rawmidi_global_ops *ops;
+
+ struct snd_rawmidi_str streams[2];
+
+ void *private_data;
+ void (*private_free) (struct snd_rawmidi *rmidi);
+
+ struct mutex open_mutex;
+ wait_queue_head_t open_wait;
+
+ struct device *dev;
+
+ struct snd_info_entry *proc_entry;
+
+#if IS_ENABLED(CONFIG_SND_SEQUENCER)
+ struct snd_seq_device *seq_dev;
+#endif
+};
+
+/* main rawmidi functions */
+
+int snd_rawmidi_new(struct snd_card *card, char *id, int device,
+ int output_count, int input_count,
+ struct snd_rawmidi **rmidi);
+void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
+ const struct snd_rawmidi_ops *ops);
+
+/* internal */
+int snd_rawmidi_init(struct snd_rawmidi *rmidi,
+ struct snd_card *card, char *id, int device,
+ int output_count, int input_count,
+ unsigned int info_flags);
+int snd_rawmidi_free(struct snd_rawmidi *rmidi);
+
+/* callbacks */
+
+int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
+ const unsigned char *buffer, int count);
+int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
+ unsigned char *buffer, int count);
+int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count);
+int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
+ unsigned char *buffer, int count);
+int snd_rawmidi_proceed(struct snd_rawmidi_substream *substream);
+
+/* main midi functions */
+
+int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
+int snd_rawmidi_kernel_open(struct snd_rawmidi *rmidi, int subdevice,
+ int mode, struct snd_rawmidi_file *rfile);
+int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
+int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
+ struct snd_rawmidi_params *params);
+int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
+ struct snd_rawmidi_params *params);
+int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream);
+int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream);
+long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
+ unsigned char *buf, long count);
+long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
+ const unsigned char *buf, long count);
+
+#endif /* __SOUND_RAWMIDI_H */