diff --git a/include/sound/control.h b/include/sound/control.h
new file mode 100644
index 0000000..7b9444c
--- /dev/null
+++ b/include/sound/control.h
@@ -0,0 +1,162 @@
+#ifndef __SOUND_CONTROL_H
+#define __SOUND_CONTROL_H
+
+/*
+ *  Header file for control interface
+ *  Copyright (c) by Jaroslav Kysela <perex@suse.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>
+
+typedef struct sndrv_aes_iec958 snd_aes_iec958_t;
+typedef struct sndrv_ctl_card_info snd_ctl_card_info_t;
+typedef enum sndrv_ctl_elem_type snd_ctl_elem_type_t;
+typedef enum sndrv_ctl_elem_iface snd_ctl_elem_iface_t;
+typedef struct sndrv_ctl_elem_id snd_ctl_elem_id_t;
+typedef struct sndrv_ctl_elem_list snd_ctl_elem_list_t;
+typedef struct sndrv_ctl_elem_info snd_ctl_elem_info_t;
+typedef struct sndrv_ctl_elem_value snd_ctl_elem_value_t;
+typedef enum sndrv_ctl_event_type snd_ctl_event_type_t;
+typedef struct sndrv_ctl_event snd_ctl_event_t;
+
+#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
+
+typedef int (snd_kcontrol_info_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo);
+typedef int (snd_kcontrol_get_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);
+typedef int (snd_kcontrol_put_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);
+
+typedef struct _snd_kcontrol_new {
+	snd_ctl_elem_iface_t iface;	/* interface identifier */
+	unsigned int device;		/* device/client number */
+	unsigned int subdevice;		/* subdevice (substream) number */
+	unsigned char *name;		/* ASCII name of item */
+	unsigned int index;		/* index of item */
+	unsigned int access;		/* access rights */
+	unsigned int count;		/* count of same elements */
+	snd_kcontrol_info_t *info;
+	snd_kcontrol_get_t *get;
+	snd_kcontrol_put_t *put;
+	unsigned long private_value;
+} snd_kcontrol_new_t;
+
+typedef struct _snd_kcontrol_volatile {
+	snd_ctl_file_t *owner;	/* locked */
+	pid_t owner_pid;
+	unsigned int access;	/* access rights */
+} snd_kcontrol_volatile_t;
+
+struct _snd_kcontrol {
+	struct list_head list;		/* list of controls */
+	snd_ctl_elem_id_t id;
+	unsigned int count;		/* count of same elements */
+	snd_kcontrol_info_t *info;
+	snd_kcontrol_get_t *get;
+	snd_kcontrol_put_t *put;
+	unsigned long private_value;
+	void *private_data;
+	void (*private_free)(snd_kcontrol_t *kcontrol);
+	snd_kcontrol_volatile_t vd[0];	/* volatile data */
+};
+
+#define snd_kcontrol(n) list_entry(n, snd_kcontrol_t, list)
+
+typedef struct _snd_kctl_event {
+	struct list_head list;	/* list of events */
+	snd_ctl_elem_id_t id;
+	unsigned int mask;
+} snd_kctl_event_t;
+
+#define snd_kctl_event(n) list_entry(n, snd_kctl_event_t, list)
+
+struct _snd_ctl_file {
+	struct list_head list;		/* list of all control files */
+	snd_card_t *card;
+	pid_t pid;
+	int prefer_pcm_subdevice;
+	int prefer_rawmidi_subdevice;
+	wait_queue_head_t change_sleep;
+	spinlock_t read_lock;
+	struct fasync_struct *fasync;
+	int subscribed;			/* read interface is activated */
+	struct list_head events;	/* waiting events for read */
+};
+
+#define snd_ctl_file(n) list_entry(n, snd_ctl_file_t, list)
+
+typedef int (*snd_kctl_ioctl_func_t) (snd_card_t * card,
+				 snd_ctl_file_t * control,
+				 unsigned int cmd, unsigned long arg);
+
+void snd_ctl_notify(snd_card_t * card, unsigned int mask, snd_ctl_elem_id_t * id);
+
+snd_kcontrol_t *snd_ctl_new(snd_kcontrol_t * kcontrol, unsigned int access);
+snd_kcontrol_t *snd_ctl_new1(snd_kcontrol_new_t * kcontrolnew, void * private_data);
+void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
+int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
+int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);
+int snd_ctl_remove_id(snd_card_t * card, snd_ctl_elem_id_t *id);
+int snd_ctl_rename_id(snd_card_t * card, snd_ctl_elem_id_t *src_id, snd_ctl_elem_id_t *dst_id);
+snd_kcontrol_t *snd_ctl_find_numid(snd_card_t * card, unsigned int numid);
+snd_kcontrol_t *snd_ctl_find_id(snd_card_t * card, snd_ctl_elem_id_t *id);
+
+int snd_ctl_create(snd_card_t *card);
+
+int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
+#ifdef CONFIG_COMPAT
+int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+#else
+#define snd_ctl_register_ioctl_compat(fcn)
+#define snd_ctl_unregister_ioctl_compat(fcn)
+#endif
+
+int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t *control);
+int snd_ctl_elem_write(snd_card_t *card, snd_ctl_file_t *file, snd_ctl_elem_value_t *control);
+
+static inline unsigned int snd_ctl_get_ioffnum(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+	return id->numid - kctl->id.numid;
+}
+
+static inline unsigned int snd_ctl_get_ioffidx(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+	return id->index - kctl->id.index;
+}
+
+static inline unsigned int snd_ctl_get_ioff(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+	if (id->numid) {
+		return snd_ctl_get_ioffnum(kctl, id);
+	} else {
+		return snd_ctl_get_ioffidx(kctl, id);
+	}
+}
+
+static inline snd_ctl_elem_id_t *snd_ctl_build_ioff(snd_ctl_elem_id_t *dst_id,
+						    snd_kcontrol_t *src_kctl,
+						    unsigned int offset)
+{
+	*dst_id = src_kctl->id;
+	dst_id->index += offset;
+	dst_id->numid += offset;
+	return dst_id;
+}
+
+#endif	/* __SOUND_CONTROL_H */