The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/isa/sndbuf_dma.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #ifdef HAVE_KERNEL_OPTION_HEADERS
   30 #include "opt_snd.h"
   31 #endif
   32 
   33 #include <dev/sound/pcm/sound.h>
   34 
   35 #include <isa/isavar.h>
   36 
   37 SND_DECLARE_FILE("$FreeBSD: stable/12/sys/dev/sound/isa/sndbuf_dma.c 326255 2017-11-27 14:52:40Z pfg $");
   38 
   39 int
   40 sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq)
   41 {
   42         /* should do isa_dma_acquire/isa_dma_release here */
   43         if (drq == NULL) {
   44                 b->dmachan = -1;
   45         } else {
   46                 sndbuf_setflags(b, SNDBUF_F_DMA, 1);
   47                 b->dmachan = rman_get_start(drq);
   48         }
   49         return 0;
   50 }
   51 
   52 int
   53 sndbuf_dmasetdir(struct snd_dbuf *b, int dir)
   54 {
   55         KASSERT(b, ("sndbuf_dmasetdir called with b == NULL"));
   56         KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmasetdir called on non-ISA buffer"));
   57 
   58         b->dir = (dir == PCMDIR_PLAY)? ISADMA_WRITE : ISADMA_READ;
   59         return 0;
   60 }
   61 
   62 void
   63 sndbuf_dma(struct snd_dbuf *b, int go)
   64 {
   65         KASSERT(b, ("sndbuf_dma called with b == NULL"));
   66         KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dma called on non-ISA buffer"));
   67 
   68         switch (go) {
   69         case PCMTRIG_START:
   70                 /* isa_dmainit(b->chan, size); */
   71                 isa_dmastart(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
   72                 break;
   73 
   74         case PCMTRIG_STOP:
   75         case PCMTRIG_ABORT:
   76                 isa_dmastop(b->dmachan);
   77                 isa_dmadone(b->dir | ISADMA_RAW, b->buf, b->bufsize, b->dmachan);
   78                 break;
   79         }
   80 
   81         DEB(printf("buf 0x%p ISA DMA %s, channel %d\n",
   82                 b,
   83                 (go == PCMTRIG_START)? "started" : "stopped",
   84                 b->dmachan));
   85 }
   86 
   87 int
   88 sndbuf_dmaptr(struct snd_dbuf *b)
   89 {
   90         int i;
   91 
   92         KASSERT(b, ("sndbuf_dmaptr called with b == NULL"));
   93         KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmaptr called on non-ISA buffer"));
   94 
   95         if (!sndbuf_runsz(b))
   96                 return 0;
   97         i = isa_dmastatus(b->dmachan);
   98         KASSERT(i >= 0, ("isa_dmastatus returned %d", i));
   99         return b->bufsize - i;
  100 }
  101 
  102 void
  103 sndbuf_dmabounce(struct snd_dbuf *b)
  104 {
  105         KASSERT(b, ("sndbuf_dmabounce called with b == NULL"));
  106         KASSERT(sndbuf_getflags(b) & SNDBUF_F_DMA, ("sndbuf_dmabounce called on non-ISA buffer"));
  107 
  108         /* tell isa_dma to bounce data in/out */
  109 }

Cache object: ecf551f18df5bd2e7566c340775cd98d


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.