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

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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/sound.h

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    1 /*
    2  * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
    3  * Copyright by Hannu Savolainen 1995
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  * $FreeBSD$
   28  */
   29 
   30 /*
   31  * first, include kernel header files.
   32  */
   33 
   34 #ifndef _OS_H_
   35 #define _OS_H_
   36 
   37 #ifdef _KERNEL
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/ioccom.h>
   41 #include <sys/filio.h>
   42 #include <sys/sockio.h>
   43 #include <sys/fcntl.h>
   44 #include <sys/tty.h>
   45 #include <sys/proc.h>
   46 #include <sys/kernel.h> /* for DATA_SET */
   47 #include <sys/module.h>
   48 #include <sys/conf.h>
   49 #include <sys/file.h>
   50 #include <sys/uio.h>
   51 #include <sys/syslog.h>
   52 #include <sys/errno.h>
   53 #include <sys/malloc.h>
   54 #include <sys/bus.h>
   55 #if __FreeBSD_version > 500000
   56 #include <sys/bio.h>
   57 #endif
   58 #include <sys/buf.h>
   59 #include <machine/clock.h>      /* for DELAY */
   60 #include <machine/resource.h>
   61 #include <machine/bus.h>
   62 #include <sys/rman.h>
   63 #include <sys/mman.h>
   64 #include <sys/poll.h>
   65 #include <sys/sbuf.h>
   66 #include <sys/soundcard.h>
   67 #include <sys/sysctl.h>
   68 #include <isa/isavar.h>
   69 #include <sys/kobj.h>
   70 #include <vm/vm.h>
   71 #include <vm/pmap.h>
   72 
   73 #undef  USING_MUTEX
   74 #undef  USING_DEVFS
   75 
   76 #if __FreeBSD_version > 500000
   77 #define USING_MUTEX
   78 #define USING_DEVFS
   79 #endif
   80 
   81 #define SND_DYNSYSCTL
   82 
   83 #ifndef INTR_MPSAFE
   84 #define INTR_TYPE_AV    INTR_TYPE_TTY
   85 #endif
   86 
   87 #ifndef INTR_MPSAFE
   88 #define INTR_MPSAFE     0
   89 #endif
   90 
   91 struct pcm_channel;
   92 struct pcm_feeder;
   93 struct snd_dbuf;
   94 struct snd_mixer;
   95 
   96 #include <dev/sound/pcm/buffer.h>
   97 #include <dev/sound/pcm/channel.h>
   98 #include <dev/sound/pcm/feeder.h>
   99 #include <dev/sound/pcm/mixer.h>
  100 #include <dev/sound/pcm/dsp.h>
  101 
  102 #define PCM_SOFTC_SIZE  512
  103 
  104 #define SND_STATUSLEN   64
  105 /* descriptor of audio device */
  106 #ifndef ISADMA_WRITE
  107 #define ISADMA_WRITE B_WRITE
  108 #define ISADMA_READ B_READ
  109 #define ISADMA_RAW B_RAW
  110 #endif
  111 
  112 #define PCM_MODVER      1
  113 
  114 #define PCM_MINVER      1
  115 #define PCM_PREFVER     PCM_MODVER
  116 #define PCM_MAXVER      1
  117 
  118 /*
  119 PROPOSAL:
  120 each unit needs:
  121 status, mixer, dsp, dspW, audio, sequencer, midi-in, seq2, sndproc = 9 devices
  122 dspW and audio are deprecated.
  123 dsp needs min 64 channels, will give it 256
  124 
  125 minor = (unit << 20) + (dev << 16) + channel
  126 currently minor = (channel << 16) + (unit << 4) + dev
  127 
  128 nomenclature:
  129         /dev/pcmX/dsp.(0..255)
  130         /dev/pcmX/dspW
  131         /dev/pcmX/audio
  132         /dev/pcmX/status
  133         /dev/pcmX/mixer
  134         [etc.]
  135 */
  136 
  137 #define PCMMINOR(x) (minor(x))
  138 #define PCMCHAN(x) ((PCMMINOR(x) & 0x00ff0000) >> 16)
  139 #define PCMUNIT(x) ((PCMMINOR(x) & 0x000000f0) >> 4)
  140 #define PCMDEV(x)   (PCMMINOR(x) & 0x0000000f)
  141 #define PCMMKMINOR(u, d, c) ((((c) & 0xff) << 16) | (((u) & 0x0f) << 4) | ((d) & 0x0f))
  142 
  143 #define SD_F_SIMPLEX            0x00000001
  144 #define SD_F_AUTOVCHAN          0x00000002
  145 #define SD_F_PRIO_RD            0x10000000
  146 #define SD_F_PRIO_WR            0x20000000
  147 #define SD_F_PRIO_SET           (SD_F_PRIO_RD | SD_F_PRIO_WR)
  148 #define SD_F_DIR_SET            0x40000000
  149 #define SD_F_TRANSIENT          0xf0000000
  150 
  151 /* many variables should be reduced to a range. Here define a macro */
  152 #define RANGE(var, low, high) (var) = \
  153         (((var)<(low))? (low) : ((var)>(high))? (high) : (var))
  154 #define DSP_BUFFSIZE (8192)
  155 
  156 /* make figuring out what a format is easier. got AFMT_STEREO already */
  157 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
  158 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
  159 #define AFMT_8BIT (AFMT_U8 | AFMT_S8)
  160 #define AFMT_SIGNED (AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
  161 #define AFMT_BIGENDIAN (AFMT_S16_BE | AFMT_U16_BE)
  162 
  163 struct pcm_channel *fkchan_setup(device_t dev);
  164 int fkchan_kill(struct pcm_channel *c);
  165 
  166 /*
  167  * Major nuber for the sound driver.
  168  */
  169 #define SND_CDEV_MAJOR 30
  170 
  171 #define SND_MAXVCHANS   255
  172 
  173 /*
  174  * Minor numbers for the sound driver.
  175  *
  176  * Unfortunately Creative called the codec chip of SB as a DSP. For this
  177  * reason the /dev/dsp is reserved for digitized audio use. There is a
  178  * device for true DSP processors but it will be called something else.
  179  * In v3.0 it's /dev/sndproc but this could be a temporary solution.
  180  */
  181 
  182 #define SND_DEV_CTL     0       /* Control port /dev/mixer */
  183 #define SND_DEV_SEQ     1       /* Sequencer /dev/sequencer */
  184 #define SND_DEV_MIDIN   2       /* Raw midi access */
  185 #define SND_DEV_DSP     3       /* Digitized voice /dev/dsp */
  186 #define SND_DEV_AUDIO   4       /* Sparc compatible /dev/audio */
  187 #define SND_DEV_DSP16   5       /* Like /dev/dsp but 16 bits/sample */
  188 #define SND_DEV_STATUS  6       /* /dev/sndstat */
  189                                 /* #7 not in use now. */
  190 #define SND_DEV_SEQ2    8       /* /dev/sequencer, level 2 interface */
  191 #define SND_DEV_SNDPROC 9       /* /dev/sndproc for programmable devices */
  192 #define SND_DEV_PSS     SND_DEV_SNDPROC /* ? */
  193 #define SND_DEV_NORESET 10
  194 #define SND_DEV_DSPREC  11      /* recording channels */
  195 
  196 #define DSP_DEFAULT_SPEED       8000
  197 
  198 #define ON              1
  199 #define OFF             0
  200 
  201 extern int pcm_veto_load;
  202 extern int snd_unit;
  203 extern devclass_t pcm_devclass;
  204 
  205 /*
  206  * some macros for debugging purposes
  207  * DDB/DEB to enable/disable debugging stuff
  208  * BVDDB   to enable debugging when bootverbose
  209  */
  210 #define DDB(x)  x       /* XXX */
  211 #define BVDDB(x) if (bootverbose) x
  212 
  213 #ifndef DEB
  214 #define DEB(x)
  215 #endif
  216 
  217 SYSCTL_DECL(_hw_snd);
  218 
  219 struct sysctl_ctx_list *snd_sysctl_tree(device_t dev);
  220 struct sysctl_oid *snd_sysctl_tree_top(device_t dev);
  221 
  222 void pcm_lock(struct snddev_info *d);
  223 void pcm_unlock(struct snddev_info *d);
  224 struct pcm_channel *pcm_getfakechan(struct snddev_info *d);
  225 struct pcm_channel *pcm_chnalloc(struct snddev_info *d, int direction, pid_t pid, int chnum);
  226 int pcm_chnrelease(struct pcm_channel *c);
  227 int pcm_chnref(struct pcm_channel *c, int ref);
  228 int pcm_inprog(struct snddev_info *d, int delta);
  229 
  230 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, void *devinfo);
  231 int pcm_chn_destroy(struct pcm_channel *ch);
  232 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch, int mkdev);
  233 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch, int rmdev);
  234 
  235 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
  236 unsigned int pcm_getbuffersize(device_t dev, unsigned int min, unsigned int deflt, unsigned int max);
  237 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
  238 int pcm_unregister(device_t dev);
  239 int pcm_setstatus(device_t dev, char *str);
  240 u_int32_t pcm_getflags(device_t dev);
  241 void pcm_setflags(device_t dev, u_int32_t val);
  242 void *pcm_getdevinfo(device_t dev);
  243 
  244 int snd_setup_intr(device_t dev, struct resource *res, int flags,
  245                    driver_intr_t hand, void *param, void **cookiep);
  246 
  247 void *snd_mtxcreate(const char *desc, const char *type);
  248 void snd_mtxfree(void *m);
  249 void snd_mtxassert(void *m);
  250 void snd_mtxlock(void *m);
  251 void snd_mtxunlock(void *m);
  252 
  253 int sysctl_hw_snd_vchans(SYSCTL_HANDLER_ARGS);
  254 
  255 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
  256 int sndstat_register(device_t dev, char *str, sndstat_handler handler);
  257 int sndstat_registerfile(char *str);
  258 int sndstat_unregister(device_t dev);
  259 int sndstat_unregisterfile(char *str);
  260 int sndstat_busy(void);
  261 
  262 #define SND_DECLARE_FILE(version) \
  263         _SND_DECLARE_FILE(__LINE__, version)
  264 
  265 #define _SND_DECLARE_FILE(uniq, version) \
  266         __SND_DECLARE_FILE(uniq, version)
  267 
  268 #define __SND_DECLARE_FILE(uniq, version) \
  269         static char sndstat_vinfo[] = version; \
  270         SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
  271         SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
  272 
  273 /* usage of flags in device config entry (config file) */
  274 #define DV_F_DRQ_MASK   0x00000007      /* mask for secondary drq */
  275 #define DV_F_DUAL_DMA   0x00000010      /* set to use secondary dma channel */
  276 
  277 /* ought to be made obsolete */
  278 #define DV_F_DEV_MASK   0x0000ff00      /* force device type/class */
  279 #define DV_F_DEV_SHIFT  8               /* force device type/class */
  280 
  281 #endif /* _KERNEL */
  282 
  283 #endif  /* _OS_H_ */

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