Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h
new file mode 100644
index 000000000..1894af415
--- /dev/null
+++ b/include/sound/rawmidi.h
@@ -0,0 +1,194 @@
+#ifndef __SOUND_RAWMIDI_H
+#define __SOUND_RAWMIDI_H
+
+/*
+ *  Abstract layer for MIDI v1.0 stream
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#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
+
+/*
+ *  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);
+};
+
+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 */
+	int buffer_ref;		/* buffer reference count */
+	/* misc */
+	spinlock_t lock;
+	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 */
+	int use_count;			/* use counter (for output) */
+	size_t bytes;
+	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;
+};
+
+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);
+
+/* 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_transmit_peek(struct snd_rawmidi_substream *substream,
+			      unsigned char *buffer, int count);
+int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream,
+			       int count);
+
+/* main midi functions */
+
+int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
+int snd_rawmidi_kernel_open(struct snd_card *card, int device, 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 */