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 <cg@freebsd.org>
    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: src/sys/dev/sound/pcm/sound.h,v 1.61.2.1 2005/01/30 01:00:05 imp Exp $
   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/buf.h>
   57 #endif
   58 #include <machine/clock.h>      /* for DELAY */
   59 #include <machine/resource.h>
   60 #include <machine/bus.h>
   61 #include <sys/rman.h>
   62 #include <sys/mman.h>
   63 #include <sys/poll.h>
   64 #include <sys/sbuf.h>
   65 #include <sys/soundcard.h>
   66 #include <sys/sysctl.h>
   67 #include <sys/kobj.h>
   68 #include <vm/vm.h>
   69 #include <vm/pmap.h>
   70 
   71 #undef  USING_MUTEX
   72 #undef  USING_DEVFS
   73 
   74 #if __FreeBSD_version > 500000
   75 #include <sys/lock.h>
   76 #include <sys/mutex.h>
   77 
   78 #define USING_MUTEX
   79 #define USING_DEVFS
   80 #else
   81 #define INTR_TYPE_AV    INTR_TYPE_TTY
   82 #define INTR_MPSAFE     0
   83 #endif
   84 
   85 #define SND_DYNSYSCTL
   86 
   87 struct pcm_channel;
   88 struct pcm_feeder;
   89 struct snd_dbuf;
   90 struct snd_mixer;
   91 
   92 #include <dev/sound/pcm/buffer.h>
   93 #include <dev/sound/pcm/channel.h>
   94 #include <dev/sound/pcm/feeder.h>
   95 #include <dev/sound/pcm/mixer.h>
   96 
   97 #define PCM_SOFTC_SIZE  512
   98 
   99 #define SND_STATUSLEN   64
  100 
  101 #define SOUND_MODVER    1
  102 
  103 #define SOUND_MINVER    1
  104 #define SOUND_PREFVER   SOUND_MODVER
  105 #define SOUND_MAXVER    1
  106 
  107 /*
  108 PROPOSAL:
  109 each unit needs:
  110 status, mixer, dsp, dspW, audio, sequencer, midi-in, seq2, sndproc = 9 devices
  111 dspW and audio are deprecated.
  112 dsp needs min 64 channels, will give it 256
  113 
  114 minor = (unit << 20) + (dev << 16) + channel
  115 currently minor = (channel << 16) + (unit << 4) + dev
  116 
  117 nomenclature:
  118         /dev/pcmX/dsp.(0..255)
  119         /dev/pcmX/dspW
  120         /dev/pcmX/audio
  121         /dev/pcmX/status
  122         /dev/pcmX/mixer
  123         [etc.]
  124 */
  125 
  126 #define PCMMINOR(x) (minor(x))
  127 #define PCMCHAN(x) ((PCMMINOR(x) & 0x00ff0000) >> 16)
  128 #define PCMUNIT(x) ((PCMMINOR(x) & 0x000000f0) >> 4)
  129 #define PCMDEV(x)   (PCMMINOR(x) & 0x0000000f)
  130 #define PCMMKMINOR(u, d, c) ((((c) & 0xff) << 16) | (((u) & 0x0f) << 4) | ((d) & 0x0f))
  131 
  132 #define SD_F_SIMPLEX            0x00000001
  133 #define SD_F_AUTOVCHAN          0x00000002
  134 #define SD_F_PRIO_RD            0x10000000
  135 #define SD_F_PRIO_WR            0x20000000
  136 #define SD_F_PRIO_SET           (SD_F_PRIO_RD | SD_F_PRIO_WR)
  137 #define SD_F_DIR_SET            0x40000000
  138 #define SD_F_TRANSIENT          0xf0000000
  139 
  140 /* many variables should be reduced to a range. Here define a macro */
  141 #define RANGE(var, low, high) (var) = \
  142         (((var)<(low))? (low) : ((var)>(high))? (high) : (var))
  143 #define DSP_BUFFSIZE (8192)
  144 
  145 /* make figuring out what a format is easier. got AFMT_STEREO already */
  146 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
  147 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
  148 #define AFMT_8BIT (AFMT_U8 | AFMT_S8)
  149 #define AFMT_SIGNED (AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
  150 #define AFMT_BIGENDIAN (AFMT_S16_BE | AFMT_U16_BE)
  151 
  152 struct pcm_channel *fkchan_setup(device_t dev);
  153 int fkchan_kill(struct pcm_channel *c);
  154 
  155 /*
  156  * Major nuber for the sound driver.
  157  */
  158 #define SND_CDEV_MAJOR 30
  159 
  160 #define SND_MAXVCHANS   255
  161 
  162 /*
  163  * Minor numbers for the sound driver.
  164  *
  165  * Unfortunately Creative called the codec chip of SB as a DSP. For this
  166  * reason the /dev/dsp is reserved for digitized audio use. There is a
  167  * device for true DSP processors but it will be called something else.
  168  * In v3.0 it's /dev/sndproc but this could be a temporary solution.
  169  */
  170 
  171 #define SND_DEV_CTL     0       /* Control port /dev/mixer */
  172 #define SND_DEV_SEQ     1       /* Sequencer /dev/sequencer */
  173 #define SND_DEV_MIDIN   2       /* Raw midi access */
  174 #define SND_DEV_DSP     3       /* Digitized voice /dev/dsp */
  175 #define SND_DEV_AUDIO   4       /* Sparc compatible /dev/audio */
  176 #define SND_DEV_DSP16   5       /* Like /dev/dsp but 16 bits/sample */
  177 #define SND_DEV_STATUS  6       /* /dev/sndstat */
  178                                 /* #7 not in use now. */
  179 #define SND_DEV_SEQ2    8       /* /dev/sequencer, level 2 interface */
  180 #define SND_DEV_SNDPROC 9       /* /dev/sndproc for programmable devices */
  181 #define SND_DEV_PSS     SND_DEV_SNDPROC /* ? */
  182 #define SND_DEV_NORESET 10
  183 #define SND_DEV_DSPREC  11      /* recording channels */
  184 
  185 #define DSP_DEFAULT_SPEED       8000
  186 
  187 #define ON              1
  188 #define OFF             0
  189 
  190 extern int pcm_veto_load;
  191 extern int snd_unit;
  192 extern devclass_t pcm_devclass;
  193 
  194 /*
  195  * some macros for debugging purposes
  196  * DDB/DEB to enable/disable debugging stuff
  197  * BVDDB   to enable debugging when bootverbose
  198  */
  199 #define BVDDB(x) if (bootverbose) x
  200 
  201 #ifndef DEB
  202 #define DEB(x)
  203 #endif
  204 
  205 SYSCTL_DECL(_hw_snd);
  206 
  207 struct sysctl_ctx_list *snd_sysctl_tree(device_t dev);
  208 struct sysctl_oid *snd_sysctl_tree_top(device_t dev);
  209 
  210 struct pcm_channel *pcm_getfakechan(struct snddev_info *d);
  211 struct pcm_channel *pcm_chnalloc(struct snddev_info *d, int direction, pid_t pid, int chnum);
  212 int pcm_chnrelease(struct pcm_channel *c);
  213 int pcm_chnref(struct pcm_channel *c, int ref);
  214 int pcm_inprog(struct snddev_info *d, int delta);
  215 
  216 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, void *devinfo);
  217 int pcm_chn_destroy(struct pcm_channel *ch);
  218 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch);
  219 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch);
  220 
  221 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
  222 unsigned int pcm_getbuffersize(device_t dev, unsigned int min, unsigned int deflt, unsigned int max);
  223 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
  224 int pcm_unregister(device_t dev);
  225 int pcm_setstatus(device_t dev, char *str);
  226 u_int32_t pcm_getflags(device_t dev);
  227 void pcm_setflags(device_t dev, u_int32_t val);
  228 void *pcm_getdevinfo(device_t dev);
  229 
  230 
  231 int snd_setup_intr(device_t dev, struct resource *res, int flags,
  232                    driver_intr_t hand, void *param, void **cookiep);
  233 
  234 void *snd_mtxcreate(const char *desc, const char *type);
  235 void snd_mtxfree(void *m);
  236 void snd_mtxassert(void *m);
  237 #define snd_mtxlock(m) mtx_lock(m)
  238 #define snd_mtxunlock(m) mtx_unlock(m)
  239 
  240 int sysctl_hw_snd_vchans(SYSCTL_HANDLER_ARGS);
  241 
  242 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
  243 int sndstat_register(device_t dev, char *str, sndstat_handler handler);
  244 int sndstat_registerfile(char *str);
  245 int sndstat_unregister(device_t dev);
  246 int sndstat_unregisterfile(char *str);
  247 int sndstat_busy(void);
  248 
  249 #define SND_DECLARE_FILE(version) \
  250         _SND_DECLARE_FILE(__LINE__, version)
  251 
  252 #define _SND_DECLARE_FILE(uniq, version) \
  253         __SND_DECLARE_FILE(uniq, version)
  254 
  255 #define __SND_DECLARE_FILE(uniq, version) \
  256         static char sndstat_vinfo[] = version; \
  257         SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
  258         SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
  259 
  260 /* usage of flags in device config entry (config file) */
  261 #define DV_F_DRQ_MASK   0x00000007      /* mask for secondary drq */
  262 #define DV_F_DUAL_DMA   0x00000010      /* set to use secondary dma channel */
  263 
  264 /* ought to be made obsolete but still used by mss */
  265 #define DV_F_DEV_MASK   0x0000ff00      /* force device type/class */
  266 #define DV_F_DEV_SHIFT  8               /* force device type/class */
  267 
  268 #define PCM_DEBUG_MTX
  269 
  270 /*
  271  * this is rather kludgey- we need to duplicate these struct def'ns from sound.c
  272  * so that the macro versions of pcm_{,un}lock can dereference them.
  273  * we also have to do this now makedev() has gone away.
  274  */
  275 
  276 struct snddev_channel {
  277         SLIST_ENTRY(snddev_channel) link;
  278         struct pcm_channel *channel;
  279         int chan_num;
  280         struct cdev *dsp_devt;
  281         struct cdev *dspW_devt;
  282         struct cdev *audio_devt;
  283         struct cdev *dspr_devt;
  284 };
  285 
  286 struct snddev_info {
  287         SLIST_HEAD(, snddev_channel) channels;
  288         struct pcm_channel *fakechan;
  289         unsigned devcount, playcount, reccount, vchancount;
  290         unsigned flags;
  291         int inprog;
  292         unsigned int bufsz;
  293         void *devinfo;
  294         device_t dev;
  295         char status[SND_STATUSLEN];
  296         struct sysctl_ctx_list sysctl_tree;
  297         struct sysctl_oid *sysctl_tree_top;
  298         struct mtx *lock;
  299         struct cdev *mixer_dev;
  300 
  301 };
  302 
  303 #ifdef  PCM_DEBUG_MTX
  304 #define pcm_lock(d) mtx_lock(((struct snddev_info *)(d))->lock)
  305 #define pcm_unlock(d) mtx_unlock(((struct snddev_info *)(d))->lock)
  306 #else
  307 void pcm_lock(struct snddev_info *d);
  308 void pcm_unlock(struct snddev_info *d);
  309 #endif
  310 
  311 #ifdef KLD_MODULE
  312 #define PCM_KLDSTRING(a) ("kld " # a)
  313 #else
  314 #define PCM_KLDSTRING(a) ""
  315 #endif
  316 
  317 #endif /* _KERNEL */
  318 
  319 #endif  /* _OS_H_ */

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