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-rw-r--r--include/sound/seq_device.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/include/sound/seq_device.h b/include/sound/seq_device.h
new file mode 100644
index 000000000..8899affe9
--- /dev/null
+++ b/include/sound/seq_device.h
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __SOUND_SEQ_DEVICE_H
+#define __SOUND_SEQ_DEVICE_H
+
+/*
+ * ALSA sequencer device management
+ * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
+ */
+
+/*
+ * registered device information
+ */
+
+struct snd_seq_device {
+ /* device info */
+ struct snd_card *card; /* sound card */
+ int device; /* device number */
+ const char *id; /* driver id */
+ char name[80]; /* device name */
+ int argsize; /* size of the argument */
+ void *driver_data; /* private data for driver */
+ void *private_data; /* private data for the caller */
+ void (*private_free)(struct snd_seq_device *device);
+ struct device dev;
+};
+
+#define to_seq_dev(_dev) \
+ container_of(_dev, struct snd_seq_device, dev)
+
+/* sequencer driver */
+
+/* driver operators
+ * probe:
+ * Initialize the device with given parameters.
+ * Typically,
+ * 1. call snd_hwdep_new
+ * 2. allocate private data and initialize it
+ * 3. call snd_hwdep_register
+ * 4. store the instance to dev->driver_data pointer.
+ *
+ * remove:
+ * Release the private data.
+ * Typically, call snd_device_free(dev->card, dev->driver_data)
+ */
+struct snd_seq_driver {
+ struct device_driver driver;
+ char *id;
+ int argsize;
+};
+
+#define to_seq_drv(_drv) \
+ container_of(_drv, struct snd_seq_driver, driver)
+
+/*
+ * prototypes
+ */
+#ifdef CONFIG_MODULES
+void snd_seq_device_load_drivers(void);
+#else
+#define snd_seq_device_load_drivers()
+#endif
+int snd_seq_device_new(struct snd_card *card, int device, const char *id,
+ int argsize, struct snd_seq_device **result);
+
+#define SNDRV_SEQ_DEVICE_ARGPTR(dev) (void *)((char *)(dev) + sizeof(struct snd_seq_device))
+
+int __must_check __snd_seq_driver_register(struct snd_seq_driver *drv,
+ struct module *mod);
+#define snd_seq_driver_register(drv) \
+ __snd_seq_driver_register(drv, THIS_MODULE)
+void snd_seq_driver_unregister(struct snd_seq_driver *drv);
+
+#define module_snd_seq_driver(drv) \
+ module_driver(drv, snd_seq_driver_register, snd_seq_driver_unregister)
+
+/*
+ * id strings for generic devices
+ */
+#define SNDRV_SEQ_DEV_ID_MIDISYNTH "seq-midi"
+#define SNDRV_SEQ_DEV_ID_OPL3 "opl3-synth"
+
+#endif /* __SOUND_SEQ_DEVICE_H */