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Diffstat (limited to 'chips/audio_defs.h')
| -rw-r--r-- | chips/audio_defs.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/chips/audio_defs.h b/chips/audio_defs.h new file mode 100644 index 00000000..448153e4 --- /dev/null +++ b/chips/audio_defs.h @@ -0,0 +1,129 @@ +/* + * 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 |