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-rw-r--r--include/sound/seq_oss.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/include/sound/seq_oss.h b/include/sound/seq_oss.h
new file mode 100644
index 000000000..7bf10a0fa
--- /dev/null
+++ b/include/sound/seq_oss.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_SEQ_OSS_H
+#define __SOUND_SEQ_OSS_H
+
+/*
+ * OSS compatible sequencer driver
+ *
+ * Copyright (C) 1998,99 Takashi Iwai
+ */
+
+#include <sound/asequencer.h>
+#include <sound/seq_kernel.h>
+
+/*
+ * argument structure for synthesizer operations
+ */
+struct snd_seq_oss_arg {
+ /* given by OSS sequencer */
+ int app_index; /* application unique index */
+ int file_mode; /* file mode - see below */
+ int seq_mode; /* sequencer mode - see below */
+
+ /* following must be initialized in open callback */
+ struct snd_seq_addr addr; /* opened port address */
+ void *private_data; /* private data for lowlevel drivers */
+
+ /* note-on event passing mode: initially given by OSS seq,
+ * but configurable by drivers - see below
+ */
+ int event_passing;
+};
+
+
+/*
+ * synthesizer operation callbacks
+ */
+struct snd_seq_oss_callback {
+ struct module *owner;
+ int (*open)(struct snd_seq_oss_arg *p, void *closure);
+ int (*close)(struct snd_seq_oss_arg *p);
+ int (*ioctl)(struct snd_seq_oss_arg *p, unsigned int cmd, unsigned long arg);
+ int (*load_patch)(struct snd_seq_oss_arg *p, int format, const char __user *buf, int offs, int count);
+ int (*reset)(struct snd_seq_oss_arg *p);
+ int (*raw_event)(struct snd_seq_oss_arg *p, unsigned char *data);
+};
+
+/* flag: file_mode */
+#define SNDRV_SEQ_OSS_FILE_ACMODE 3
+#define SNDRV_SEQ_OSS_FILE_READ 1
+#define SNDRV_SEQ_OSS_FILE_WRITE 2
+#define SNDRV_SEQ_OSS_FILE_NONBLOCK 4
+
+/* flag: seq_mode */
+#define SNDRV_SEQ_OSS_MODE_SYNTH 0
+#define SNDRV_SEQ_OSS_MODE_MUSIC 1
+
+/* flag: event_passing */
+#define SNDRV_SEQ_OSS_PROCESS_EVENTS 0 /* key == 255 is processed as velocity change */
+#define SNDRV_SEQ_OSS_PASS_EVENTS 1 /* pass all events to callback */
+#define SNDRV_SEQ_OSS_PROCESS_KEYPRESS 2 /* key >= 128 will be processed as key-pressure */
+
+/* default control rate: fixed */
+#define SNDRV_SEQ_OSS_CTRLRATE 100
+
+/* default max queue length: configurable by module option */
+#define SNDRV_SEQ_OSS_MAX_QLEN 1024
+
+
+/*
+ * data pointer to snd_seq_register_device
+ */
+struct snd_seq_oss_reg {
+ int type;
+ int subtype;
+ int nvoices;
+ struct snd_seq_oss_callback oper;
+ void *private_data;
+};
+
+/* device id */
+#define SNDRV_SEQ_DEV_ID_OSS "seq-oss"
+
+#endif /* __SOUND_SEQ_OSS_H */