diff --git a/sound/oss/msnd.h b/sound/oss/msnd.h
new file mode 100644
index 0000000..05cf786
--- /dev/null
+++ b/sound/oss/msnd.h
@@ -0,0 +1,280 @@
+/*********************************************************************
+ *
+ * msnd.h
+ *
+ * Turtle Beach MultiSound Sound Card Driver for Linux
+ *
+ * Some parts of this header file were derived from the Turtle Beach
+ * MultiSound Driver Development Kit.
+ *
+ * Copyright (C) 1998 Andrew Veliath
+ * Copyright (C) 1993 Turtle Beach Systems, Inc.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: msnd.h,v 1.36 1999/03/21 17:05:42 andrewtv Exp $
+ *
+ ********************************************************************/
+#ifndef __MSND_H
+#define __MSND_H
+
+#define VERSION			"0.8.3.1"
+
+#define DEFSAMPLERATE		DSP_DEFAULT_SPEED
+#define DEFSAMPLESIZE		AFMT_U8
+#define DEFCHANNELS		1
+
+#define DEFFIFOSIZE		128
+
+#define SNDCARD_MSND		38
+
+#define SRAM_BANK_SIZE		0x8000
+#define SRAM_CNTL_START		0x7F00
+
+#define DSP_BASE_ADDR		0x4000
+#define DSP_BANK_BASE		0x4000
+
+#define	HP_ICR			0x00
+#define	HP_CVR			0x01
+#define	HP_ISR			0x02
+#define	HP_IVR			0x03
+#define HP_NU			0x04
+#define HP_INFO			0x04
+#define	HP_TXH			0x05
+#define	HP_RXH			0x05
+#define	HP_TXM			0x06
+#define	HP_RXM			0x06
+#define	HP_TXL			0x07
+#define	HP_RXL			0x07
+
+#define HP_ICR_DEF		0x00
+#define HP_CVR_DEF		0x12
+#define HP_ISR_DEF		0x06
+#define HP_IVR_DEF		0x0f
+#define HP_NU_DEF		0x00
+
+#define	HP_IRQM			0x09
+
+#define	HPR_BLRC		0x08
+#define	HPR_SPR1		0x09
+#define	HPR_SPR2		0x0A
+#define	HPR_TCL0		0x0B
+#define	HPR_TCL1		0x0C
+#define	HPR_TCL2		0x0D
+#define	HPR_TCL3		0x0E
+#define	HPR_TCL4		0x0F
+
+#define	HPICR_INIT		0x80
+#define HPICR_HM1		0x40
+#define HPICR_HM0		0x20
+#define HPICR_HF1		0x10
+#define HPICR_HF0		0x08
+#define	HPICR_TREQ		0x02
+#define	HPICR_RREQ		0x01
+
+#define HPCVR_HC		0x80
+
+#define	HPISR_HREQ		0x80
+#define HPISR_DMA		0x40
+#define HPISR_HF3		0x10
+#define HPISR_HF2		0x08
+#define	HPISR_TRDY		0x04
+#define	HPISR_TXDE		0x02
+#define	HPISR_RXDF		0x01
+
+#define	HPIO_290		0
+#define	HPIO_260		1
+#define	HPIO_250		2
+#define	HPIO_240		3
+#define	HPIO_230		4
+#define	HPIO_220		5
+#define	HPIO_210		6
+#define	HPIO_3E0		7
+
+#define	HPMEM_NONE		0
+#define	HPMEM_B000		1
+#define	HPMEM_C800		2
+#define	HPMEM_D000		3
+#define	HPMEM_D400		4
+#define	HPMEM_D800		5
+#define	HPMEM_E000		6
+#define	HPMEM_E800		7
+
+#define	HPIRQ_NONE		0
+#define HPIRQ_5			1
+#define HPIRQ_7			2
+#define HPIRQ_9			3
+#define HPIRQ_10		4
+#define HPIRQ_11		5
+#define HPIRQ_12		6
+#define HPIRQ_15		7
+
+#define	HIMT_PLAY_DONE		0x00
+#define	HIMT_RECORD_DONE	0x01
+#define	HIMT_MIDI_EOS		0x02
+#define	HIMT_MIDI_OUT		0x03
+
+#define	HIMT_MIDI_IN_UCHAR	0x0E
+#define	HIMT_DSP		0x0F
+
+#define	HDEX_BASE	       	0x92
+#define	HDEX_PLAY_START		(0 + HDEX_BASE)
+#define	HDEX_PLAY_STOP		(1 + HDEX_BASE)
+#define	HDEX_PLAY_PAUSE		(2 + HDEX_BASE)
+#define	HDEX_PLAY_RESUME	(3 + HDEX_BASE)
+#define	HDEX_RECORD_START	(4 + HDEX_BASE)
+#define	HDEX_RECORD_STOP	(5 + HDEX_BASE)
+#define	HDEX_MIDI_IN_START 	(6 + HDEX_BASE)
+#define	HDEX_MIDI_IN_STOP	(7 + HDEX_BASE)
+#define	HDEX_MIDI_OUT_START	(8 + HDEX_BASE)
+#define	HDEX_MIDI_OUT_STOP	(9 + HDEX_BASE)
+#define	HDEX_AUX_REQ		(10 + HDEX_BASE)
+
+#define HIWORD(l)		((WORD)((((DWORD)(l)) >> 16) & 0xFFFF))
+#define LOWORD(l)		((WORD)(DWORD)(l))
+#define HIBYTE(w)		((BYTE)(((WORD)(w) >> 8) & 0xFF))
+#define LOBYTE(w)		((BYTE)(w))
+#define MAKELONG(low,hi)	((long)(((WORD)(low))|(((DWORD)((WORD)(hi)))<<16)))
+#define MAKEWORD(low,hi)	((WORD)(((BYTE)(low))|(((WORD)((BYTE)(hi)))<<8)))
+
+#define PCTODSP_OFFSET(w)	(USHORT)((w)/2)
+#define PCTODSP_BASED(w)	(USHORT)(((w)/2) + DSP_BASE_ADDR)
+#define DSPTOPC_BASED(w)	(((w) - DSP_BASE_ADDR) * 2)
+
+#ifdef SLOWIO
+#define msnd_outb			outb_p
+#define msnd_inb			inb_p
+#else
+#define msnd_outb			outb
+#define msnd_inb			inb
+#endif
+
+/* JobQueueStruct */
+#define JQS_wStart		0x00
+#define JQS_wSize		0x02
+#define JQS_wHead		0x04
+#define JQS_wTail		0x06
+#define JQS__size		0x08
+
+/* DAQueueDataStruct */
+#define DAQDS_wStart		0x00
+#define DAQDS_wSize		0x02
+#define DAQDS_wFormat		0x04
+#define DAQDS_wSampleSize	0x06
+#define DAQDS_wChannels		0x08
+#define DAQDS_wSampleRate	0x0A
+#define DAQDS_wIntMsg		0x0C
+#define DAQDS_wFlags		0x0E
+#define DAQDS__size		0x10
+
+typedef u8			BYTE;
+typedef u16			USHORT;
+typedef u16			WORD;
+typedef u32			DWORD;
+typedef void __iomem *		LPDAQD;
+
+/* Generic FIFO */
+typedef struct {
+	size_t n, len;
+	char *data;
+	int head, tail;
+} msnd_fifo;
+
+typedef struct multisound_dev {
+	/* Linux device info */
+	char *name;
+	int dsp_minor, mixer_minor;
+	int ext_midi_dev, hdr_midi_dev;
+
+	/* Hardware resources */
+	int io, numio;
+	int memid, irqid;
+	int irq, irq_ref;
+	unsigned char info;
+	void __iomem *base;
+
+	/* Motorola 56k DSP SMA */
+	void __iomem *SMA;
+	void __iomem *DAPQ, *DARQ, *MODQ, *MIDQ, *DSPQ;
+	void __iomem *pwDSPQData, *pwMIDQData, *pwMODQData;
+	int dspq_data_buff, dspq_buff_size;
+
+	/* State variables */
+	enum { msndClassic, msndPinnacle } type;
+	mode_t mode;
+	unsigned long flags;
+#define F_RESETTING			0
+#define F_HAVEDIGITAL			1
+#define F_AUDIO_WRITE_INUSE		2
+#define F_WRITING			3
+#define F_WRITEBLOCK			4
+#define F_WRITEFLUSH			5
+#define F_AUDIO_READ_INUSE		6
+#define F_READING			7
+#define F_READBLOCK			8
+#define F_EXT_MIDI_INUSE		9
+#define F_HDR_MIDI_INUSE		10
+#define F_DISABLE_WRITE_NDELAY		11
+	wait_queue_head_t writeblock;
+	wait_queue_head_t readblock;
+	wait_queue_head_t writeflush;
+	spinlock_t lock;
+	int nresets;
+	unsigned long recsrc;
+	int left_levels[16];
+	int right_levels[16];
+	int mixer_mod_count;
+	int calibrate_signal;
+	int play_sample_size, play_sample_rate, play_channels;
+	int play_ndelay;
+	int rec_sample_size, rec_sample_rate, rec_channels;
+	int rec_ndelay;
+	BYTE bCurrentMidiPatch;
+
+	/* Digital audio FIFOs */
+	msnd_fifo DAPF, DARF;
+	int fifosize;
+	int last_playbank, last_recbank;
+
+	/* MIDI in callback */
+	void (*midi_in_interrupt)(struct multisound_dev *);
+} multisound_dev_t;
+
+#ifndef mdelay
+#  define mdelay(a)		udelay((a) * 1000)
+#endif
+
+int				msnd_register(multisound_dev_t *dev);
+void				msnd_unregister(multisound_dev_t *dev);
+
+void				msnd_init_queue(void __iomem *, int start, int size);
+
+void				msnd_fifo_init(msnd_fifo *f);
+void				msnd_fifo_free(msnd_fifo *f);
+int				msnd_fifo_alloc(msnd_fifo *f, size_t n);
+void				msnd_fifo_make_empty(msnd_fifo *f);
+int				msnd_fifo_write_io(msnd_fifo *f, char __iomem *buf, size_t len);
+int				msnd_fifo_read_io(msnd_fifo *f, char __iomem *buf, size_t len);
+int				msnd_fifo_write(msnd_fifo *f, const char *buf, size_t len);
+int				msnd_fifo_read(msnd_fifo *f, char *buf, size_t len);
+
+int				msnd_send_dsp_cmd(multisound_dev_t *dev, BYTE cmd);
+int				msnd_send_word(multisound_dev_t *dev, unsigned char high,
+					       unsigned char mid, unsigned char low);
+int				msnd_upload_host(multisound_dev_t *dev, char *bin, int len);
+int				msnd_enable_irq(multisound_dev_t *dev);
+int				msnd_disable_irq(multisound_dev_t *dev);
+
+#endif /* __MSND_H */