Initial source

1 files changed, 129 insertions, 0 deletions

diff --git a/chips/audio_defs.h b/chips/audio_defs.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1993 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*-
+ * Copyright (c) 1991, 1992 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the Computer Systems
+ * 	Engineering Group at Lawrence Berkeley Laboratory.
+ * 4. The name of the Laboratory may not be used to endorse or promote 
+ *    products derived from this software without specific prior written 
+ *    permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#define AUCB_SIZE 4096
+#define AUCB_MOD(k)	((k) & (AUCB_SIZE - 1))
+
+#define AUCB_INIT(cb)	((cb)->cb_head = (cb)->cb_tail = (cb)->cb_drops = \
+			 (cb)->cb_pdrops = 0)
+
+#define AUCB_EMPTY(cb)	((cb)->cb_head == (cb)->cb_tail)
+#define AUCB_FULL(cb)	(AUCB_MOD((cb)->cb_tail + 1) == (cb)->cb_head)
+#define AUCB_LEN(cb)	(AUCB_MOD((cb)->cb_tail - (cb)->cb_head))
+
+#define MAXBLKSIZE (AUCB_SIZE / 2)
+#define DEFBLKSIZE 128
+
+#ifndef LOCORE
+
+/*
+ * Our own circular buffers, used if not doing DMA.
+ * [af: with some work we could use the circbuf.c code instead]
+ */
+typedef struct au_cb {
+	int	cb_head;		/* queue head */
+	int	cb_tail;		/* queue tail */
+	int	cb_thresh;		/* threshold for wakeup */
+	unsigned int	cb_waking;	/* needs wakeup at softint level */
+	unsigned int	cb_pause;	/* io paused */
+	unsigned int	cb_drops;	/* missed samples from over/underrun */
+	unsigned int	cb_pdrops;	/* sun compat -- paused samples */
+	unsigned char	cb_data[AUCB_SIZE];	/* data buffer */
+} au_cb_t;
+
+/*
+ * Handle on a bi-directional stream of samples
+ */
+typedef struct au_io {
+	unsigned int	au_stamp;	/* time stamp */
+	int	au_lowat;		/* xmit low water mark (for wakeup) */
+	int	au_hiwat;		/* xmit high water mark (for wakeup) */
+	int	au_blksize;		/* recv block (chunk) size */
+	int	au_backlog;		/* # samples of xmit backlog to gen. */
+	struct	au_cb au_rb;		/* read (recv) buffer */
+	struct	au_cb au_wb;		/* write (xmit) buffer */
+} au_io_t;
+
+/*
+ * Interface to specific chips
+ */
+typedef struct {
+	void	(*init)();
+	void	(*close)();
+	void	(*setport)();
+	int	(*getport)();
+	void	(*setgains)();
+	void	(*getgains)();
+	io_return_t	(*setstate)();
+	io_return_t	(*getstate)();
+} audio_switch_t;
+
+/*
+ * Callbacks into audio module, and interface to kernel
+ */
+void		audio_attach( void *, audio_switch_t *, void **);
+boolean_t	audio_hwintr( void *, unsigned int, unsigned int *);
+
+extern io_return_t audio_open( int, int, io_req_t );
+extern io_return_t audio_close( int );
+extern io_return_t audio_read( int, io_req_t );
+extern io_return_t audio_write( int, io_req_t );
+extern io_return_t audio_get_status( int, dev_flavor_t, dev_status_t, natural_t *);
+extern io_return_t audio_set_status( int, dev_flavor_t, dev_status_t, natural_t);
+
+#endif