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  * $FreeBSD$
   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 PCMMAXCHAN              0xff
  127 #define PCMMAXDEV               0x0f
  128 #define PCMMAXUNIT              0x0f
  129 #define PCMMINOR(x)             (minor(x))
  130 #define PCMCHAN(x)              ((PCMMINOR(x) >> 16) & PCMMAXCHAN)
  131 #define PCMUNIT(x)              ((PCMMINOR(x) >> 4) & PCMMAXUNIT)
  132 #define PCMDEV(x)               (PCMMINOR(x) & PCMMAXDEV)
  133 #define PCMMKMINOR(u, d, c)     ((((c) & PCMMAXCHAN) << 16) | \
  134                                 (((u) & PCMMAXUNIT) << 4) | ((d) & PCMMAXDEV))
  135 
  136 #define SD_F_SIMPLEX            0x00000001
  137 #define SD_F_AUTOVCHAN          0x00000002
  138 #define SD_F_SOFTPCMVOL         0x00000004
  139 #define SD_F_PRIO_RD            0x10000000
  140 #define SD_F_PRIO_WR            0x20000000
  141 #define SD_F_PRIO_SET           (SD_F_PRIO_RD | SD_F_PRIO_WR)
  142 #define SD_F_DIR_SET            0x40000000
  143 #define SD_F_TRANSIENT          0xf0000000
  144 
  145 /* many variables should be reduced to a range. Here define a macro */
  146 #define RANGE(var, low, high) (var) = \
  147         (((var)<(low))? (low) : ((var)>(high))? (high) : (var))
  148 #define DSP_BUFFSIZE (8192)
  149 
  150 /* make figuring out what a format is easier. got AFMT_STEREO already */
  151 #define AFMT_32BIT (AFMT_S32_LE | AFMT_S32_BE | AFMT_U32_LE | AFMT_U32_BE)
  152 #define AFMT_24BIT (AFMT_S24_LE | AFMT_S24_BE | AFMT_U24_LE | AFMT_U24_BE)
  153 #define AFMT_16BIT (AFMT_S16_LE | AFMT_S16_BE | AFMT_U16_LE | AFMT_U16_BE)
  154 #define AFMT_8BIT (AFMT_MU_LAW | AFMT_A_LAW | AFMT_U8 | AFMT_S8)
  155 #define AFMT_SIGNED (AFMT_S32_LE | AFMT_S32_BE | AFMT_S24_LE | AFMT_S24_BE | \
  156                         AFMT_S16_LE | AFMT_S16_BE | AFMT_S8)
  157 #define AFMT_BIGENDIAN (AFMT_S32_BE | AFMT_U32_BE | AFMT_S24_BE | AFMT_U24_BE | \
  158                         AFMT_S16_BE | AFMT_U16_BE)
  159 
  160 struct pcm_channel *fkchan_setup(device_t dev);
  161 int fkchan_kill(struct pcm_channel *c);
  162 
  163 /* XXX Flawed definition. I'll fix it someday. */
  164 #define SND_MAXVCHANS   PCMMAXCHAN
  165 
  166 /*
  167  * Minor numbers for the sound driver.
  168  *
  169  * Unfortunately Creative called the codec chip of SB as a DSP. For this
  170  * reason the /dev/dsp is reserved for digitized audio use. There is a
  171  * device for true DSP processors but it will be called something else.
  172  * In v3.0 it's /dev/sndproc but this could be a temporary solution.
  173  */
  174 
  175 #define SND_DEV_CTL     0       /* Control port /dev/mixer */
  176 #define SND_DEV_SEQ     1       /* Sequencer /dev/sequencer */
  177 #define SND_DEV_MIDIN   2       /* Raw midi access */
  178 #define SND_DEV_DSP     3       /* Digitized voice /dev/dsp */
  179 #define SND_DEV_AUDIO   4       /* Sparc compatible /dev/audio */
  180 #define SND_DEV_DSP16   5       /* Like /dev/dsp but 16 bits/sample */
  181 #define SND_DEV_STATUS  6       /* /dev/sndstat */
  182                                 /* #7 not in use now. */
  183 #define SND_DEV_SEQ2    8       /* /dev/sequencer, level 2 interface */
  184 #define SND_DEV_SNDPROC 9       /* /dev/sndproc for programmable devices */
  185 #define SND_DEV_PSS     SND_DEV_SNDPROC /* ? */
  186 #define SND_DEV_NORESET 10
  187 #define SND_DEV_DSPREC  11      /* recording channels */
  188 
  189 #define DSP_DEFAULT_SPEED       8000
  190 
  191 #define ON              1
  192 #define OFF             0
  193 
  194 extern int pcm_veto_load;
  195 extern int snd_unit;
  196 extern devclass_t pcm_devclass;
  197 
  198 /*
  199  * some macros for debugging purposes
  200  * DDB/DEB to enable/disable debugging stuff
  201  * BVDDB   to enable debugging when bootverbose
  202  */
  203 #define BVDDB(x) if (bootverbose) x
  204 
  205 #ifndef DEB
  206 #define DEB(x)
  207 #endif
  208 
  209 SYSCTL_DECL(_hw_snd);
  210 
  211 struct sysctl_ctx_list *snd_sysctl_tree(device_t dev);
  212 struct sysctl_oid *snd_sysctl_tree_top(device_t dev);
  213 
  214 struct pcm_channel *pcm_getfakechan(struct snddev_info *d);
  215 int pcm_chnalloc(struct snddev_info *d, struct pcm_channel **ch, int direction, pid_t pid, int chnum);
  216 int pcm_chnrelease(struct pcm_channel *c);
  217 int pcm_chnref(struct pcm_channel *c, int ref);
  218 int pcm_inprog(struct snddev_info *d, int delta);
  219 
  220 struct pcm_channel *pcm_chn_create(struct snddev_info *d, struct pcm_channel *parent, kobj_class_t cls, int dir, void *devinfo);
  221 int pcm_chn_destroy(struct pcm_channel *ch);
  222 int pcm_chn_add(struct snddev_info *d, struct pcm_channel *ch);
  223 int pcm_chn_remove(struct snddev_info *d, struct pcm_channel *ch);
  224 
  225 int pcm_addchan(device_t dev, int dir, kobj_class_t cls, void *devinfo);
  226 unsigned int pcm_getbuffersize(device_t dev, unsigned int min, unsigned int deflt, unsigned int max);
  227 int pcm_register(device_t dev, void *devinfo, int numplay, int numrec);
  228 int pcm_unregister(device_t dev);
  229 int pcm_setstatus(device_t dev, char *str);
  230 u_int32_t pcm_getflags(device_t dev);
  231 void pcm_setflags(device_t dev, u_int32_t val);
  232 void *pcm_getdevinfo(device_t dev);
  233 
  234 
  235 int snd_setup_intr(device_t dev, struct resource *res, int flags,
  236                    driver_intr_t hand, void *param, void **cookiep);
  237 
  238 void *snd_mtxcreate(const char *desc, const char *type);
  239 void snd_mtxfree(void *m);
  240 void snd_mtxassert(void *m);
  241 #define snd_mtxlock(m) mtx_lock(m)
  242 #define snd_mtxunlock(m) mtx_unlock(m)
  243 
  244 int sysctl_hw_snd_vchans(SYSCTL_HANDLER_ARGS);
  245 
  246 typedef int (*sndstat_handler)(struct sbuf *s, device_t dev, int verbose);
  247 int sndstat_acquire(void);
  248 int sndstat_release(void);
  249 int sndstat_register(device_t dev, char *str, sndstat_handler handler);
  250 int sndstat_registerfile(char *str);
  251 int sndstat_unregister(device_t dev);
  252 int sndstat_unregisterfile(char *str);
  253 
  254 #define SND_DECLARE_FILE(version) \
  255         _SND_DECLARE_FILE(__LINE__, version)
  256 
  257 #define _SND_DECLARE_FILE(uniq, version) \
  258         __SND_DECLARE_FILE(uniq, version)
  259 
  260 #define __SND_DECLARE_FILE(uniq, version) \
  261         static char sndstat_vinfo[] = version; \
  262         SYSINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_registerfile, sndstat_vinfo); \
  263         SYSUNINIT(sdf_ ## uniq, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sndstat_unregisterfile, sndstat_vinfo);
  264 
  265 /* usage of flags in device config entry (config file) */
  266 #define DV_F_DRQ_MASK   0x00000007      /* mask for secondary drq */
  267 #define DV_F_DUAL_DMA   0x00000010      /* set to use secondary dma channel */
  268 
  269 /* ought to be made obsolete but still used by mss */
  270 #define DV_F_DEV_MASK   0x0000ff00      /* force device type/class */
  271 #define DV_F_DEV_SHIFT  8               /* force device type/class */
  272 
  273 #define PCM_DEBUG_MTX
  274 
  275 /*
  276  * this is rather kludgey- we need to duplicate these struct def'ns from sound.c
  277  * so that the macro versions of pcm_{,un}lock can dereference them.
  278  * we also have to do this now makedev() has gone away.
  279  */
  280 
  281 struct snddev_channel {
  282         SLIST_ENTRY(snddev_channel) link;
  283         struct pcm_channel *channel;
  284         int chan_num;
  285         struct cdev *dsp_devt;
  286         struct cdev *dspW_devt;
  287         struct cdev *audio_devt;
  288         struct cdev *dspr_devt;
  289 };
  290 
  291 struct snddev_info {
  292         SLIST_HEAD(, snddev_channel) channels;
  293         struct pcm_channel *fakechan;
  294         unsigned devcount, playcount, reccount, vchancount;
  295         unsigned flags;
  296         int inprog;
  297         unsigned int bufsz;
  298         void *devinfo;
  299         device_t dev;
  300         char status[SND_STATUSLEN];
  301         struct sysctl_ctx_list sysctl_tree;
  302         struct sysctl_oid *sysctl_tree_top;
  303         struct mtx *lock;
  304         struct cdev *mixer_dev;
  305 
  306 };
  307 
  308 #ifdef  PCM_DEBUG_MTX
  309 #define pcm_lock(d) mtx_lock(((struct snddev_info *)(d))->lock)
  310 #define pcm_unlock(d) mtx_unlock(((struct snddev_info *)(d))->lock)
  311 #else
  312 void pcm_lock(struct snddev_info *d);
  313 void pcm_unlock(struct snddev_info *d);
  314 #endif
  315 
  316 #ifdef KLD_MODULE
  317 #define PCM_KLDSTRING(a) ("kld " # a)
  318 #else
  319 #define PCM_KLDSTRING(a) ""
  320 #endif
  321 
  322 #endif /* _KERNEL */
  323 
  324 #endif  /* _OS_H_ */

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