7ac40f5f59
branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
512 lines
10 KiB
C
512 lines
10 KiB
C
/*
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* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <dev/sound/pcm/sound.h>
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#include "mixer_if.h"
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SND_DECLARE_FILE("$FreeBSD$");
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MALLOC_DEFINE(M_MIXER, "mixer", "mixer");
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#define MIXER_NAMELEN 16
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struct snd_mixer {
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KOBJ_FIELDS;
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const char *type;
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void *devinfo;
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int busy;
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int hwvol_muted;
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int hwvol_mixer;
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int hwvol_step;
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u_int32_t hwvol_mute_level;
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u_int32_t devs;
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u_int32_t recdevs;
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u_int32_t recsrc;
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u_int16_t level[32];
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char name[MIXER_NAMELEN];
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struct mtx *lock;
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};
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static u_int16_t snd_mixerdefaults[SOUND_MIXER_NRDEVICES] = {
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[SOUND_MIXER_VOLUME] = 75,
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[SOUND_MIXER_BASS] = 50,
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[SOUND_MIXER_TREBLE] = 50,
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[SOUND_MIXER_SYNTH] = 75,
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[SOUND_MIXER_PCM] = 75,
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[SOUND_MIXER_SPEAKER] = 75,
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[SOUND_MIXER_LINE] = 75,
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[SOUND_MIXER_MIC] = 0,
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[SOUND_MIXER_CD] = 75,
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[SOUND_MIXER_LINE1] = 75,
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[SOUND_MIXER_VIDEO] = 75,
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[SOUND_MIXER_RECLEV] = 0,
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[SOUND_MIXER_OGAIN] = 50,
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[SOUND_MIXER_MONITOR] = 75,
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};
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static char* snd_mixernames[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_NAMES;
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static d_open_t mixer_open;
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static d_close_t mixer_close;
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static struct cdevsw mixer_cdevsw = {
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.d_open = mixer_open,
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.d_close = mixer_close,
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.d_ioctl = mixer_ioctl,
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.d_name = "mixer",
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.d_maj = SND_CDEV_MAJOR,
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};
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#ifdef USING_DEVFS
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static eventhandler_tag mixer_ehtag;
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#endif
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static dev_t
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mixer_get_devt(device_t dev)
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{
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dev_t pdev;
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int unit;
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unit = device_get_unit(dev);
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pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(unit, SND_DEV_CTL, 0));
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return pdev;
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}
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#ifdef SND_DYNSYSCTL
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static int
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mixer_lookup(char *devname)
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{
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int i;
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
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if (strncmp(devname, snd_mixernames[i],
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strlen(snd_mixernames[i])) == 0)
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return i;
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return -1;
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}
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#endif
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static int
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mixer_set(struct snd_mixer *mixer, unsigned dev, unsigned lev)
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{
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unsigned l, r;
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int v;
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if ((dev >= SOUND_MIXER_NRDEVICES) || (0 == (mixer->devs & (1 << dev))))
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return -1;
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l = min((lev & 0x00ff), 100);
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r = min(((lev & 0xff00) >> 8), 100);
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v = MIXER_SET(mixer, dev, l, r);
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if (v < 0)
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return -1;
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mixer->level[dev] = l | (r << 8);
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return 0;
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}
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static int
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mixer_get(struct snd_mixer *mixer, int dev)
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{
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if ((dev < SOUND_MIXER_NRDEVICES) && (mixer->devs & (1 << dev)))
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return mixer->level[dev];
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else return -1;
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}
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static int
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mixer_setrecsrc(struct snd_mixer *mixer, u_int32_t src)
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{
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src &= mixer->recdevs;
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if (src == 0)
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src = SOUND_MASK_MIC;
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mixer->recsrc = MIXER_SETRECSRC(mixer, src);
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return 0;
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}
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static int
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mixer_getrecsrc(struct snd_mixer *mixer)
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{
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return mixer->recsrc;
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}
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void
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mix_setdevs(struct snd_mixer *m, u_int32_t v)
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{
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m->devs = v;
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}
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void
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mix_setrecdevs(struct snd_mixer *m, u_int32_t v)
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{
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m->recdevs = v;
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}
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u_int32_t
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mix_getdevs(struct snd_mixer *m)
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{
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return m->devs;
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}
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u_int32_t
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mix_getrecdevs(struct snd_mixer *m)
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{
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return m->recdevs;
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}
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void *
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mix_getdevinfo(struct snd_mixer *m)
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{
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return m->devinfo;
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}
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int
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mixer_init(device_t dev, kobj_class_t cls, void *devinfo)
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{
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struct snd_mixer *m;
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u_int16_t v;
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dev_t pdev;
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int i, unit;
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m = (struct snd_mixer *)kobj_create(cls, M_MIXER, M_WAITOK | M_ZERO);
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snprintf(m->name, MIXER_NAMELEN, "%s:mixer", device_get_nameunit(dev));
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m->lock = snd_mtxcreate(m->name, "pcm mixer");
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m->type = cls->name;
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m->devinfo = devinfo;
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m->busy = 0;
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if (MIXER_INIT(m))
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goto bad;
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
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v = snd_mixerdefaults[i];
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mixer_set(m, i, v | (v << 8));
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}
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mixer_setrecsrc(m, SOUND_MASK_MIC);
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unit = device_get_unit(dev);
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pdev = make_dev(&mixer_cdevsw, PCMMKMINOR(unit, SND_DEV_CTL, 0),
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UID_ROOT, GID_WHEEL, 0666, "mixer%d", unit);
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pdev->si_drv1 = m;
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return 0;
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bad:
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snd_mtxlock(m->lock);
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snd_mtxfree(m->lock);
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kobj_delete((kobj_t)m, M_MIXER);
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return -1;
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}
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int
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mixer_uninit(device_t dev)
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{
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int i;
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struct snd_mixer *m;
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dev_t pdev;
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pdev = mixer_get_devt(dev);
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m = pdev->si_drv1;
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snd_mtxlock(m->lock);
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if (m->busy) {
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snd_mtxunlock(m->lock);
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return EBUSY;
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}
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pdev->si_drv1 = NULL;
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destroy_dev(pdev);
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
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mixer_set(m, i, 0);
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mixer_setrecsrc(m, SOUND_MASK_MIC);
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MIXER_UNINIT(m);
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snd_mtxfree(m->lock);
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kobj_delete((kobj_t)m, M_MIXER);
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return 0;
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}
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int
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mixer_reinit(device_t dev)
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{
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struct snd_mixer *m;
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dev_t pdev;
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int i;
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pdev = mixer_get_devt(dev);
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m = pdev->si_drv1;
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snd_mtxlock(m->lock);
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i = MIXER_REINIT(m);
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if (i) {
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snd_mtxunlock(m->lock);
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return i;
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}
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for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
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mixer_set(m, i, m->level[i]);
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mixer_setrecsrc(m, m->recsrc);
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snd_mtxunlock(m->lock);
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return 0;
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}
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#ifdef SND_DYNSYSCTL
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static int
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sysctl_hw_snd_hwvol_mixer(SYSCTL_HANDLER_ARGS)
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{
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char devname[32];
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int error, dev;
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struct snd_mixer *m;
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m = oidp->oid_arg1;
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snd_mtxlock(m->lock);
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strncpy(devname, snd_mixernames[m->hwvol_mixer], sizeof(devname));
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snd_mtxunlock(m->lock);
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error = sysctl_handle_string(oidp, &devname[0], sizeof(devname), req);
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snd_mtxlock(m->lock);
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if (error == 0 && req->newptr != NULL) {
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dev = mixer_lookup(devname);
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if (dev == -1) {
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snd_mtxunlock(m->lock);
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return EINVAL;
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}
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else if (dev != m->hwvol_mixer) {
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m->hwvol_mixer = dev;
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m->hwvol_muted = 0;
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}
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}
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snd_mtxunlock(m->lock);
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return error;
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}
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#endif
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int
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mixer_hwvol_init(device_t dev)
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{
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struct snd_mixer *m;
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dev_t pdev;
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pdev = mixer_get_devt(dev);
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m = pdev->si_drv1;
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snd_mtxlock(m->lock);
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m->hwvol_mixer = SOUND_MIXER_VOLUME;
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m->hwvol_step = 5;
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#ifdef SND_DYNSYSCTL
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SYSCTL_ADD_INT(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
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OID_AUTO, "hwvol_step", CTLFLAG_RW, &m->hwvol_step, 0, "");
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SYSCTL_ADD_PROC(snd_sysctl_tree(dev), SYSCTL_CHILDREN(snd_sysctl_tree_top(dev)),
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OID_AUTO, "hwvol_mixer", CTLTYPE_STRING | CTLFLAG_RW, m, 0,
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sysctl_hw_snd_hwvol_mixer, "A", "");
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#endif
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snd_mtxunlock(m->lock);
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return 0;
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}
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void
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mixer_hwvol_mute(device_t dev)
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{
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struct snd_mixer *m;
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dev_t pdev;
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pdev = mixer_get_devt(dev);
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m = pdev->si_drv1;
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snd_mtxlock(m->lock);
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if (m->hwvol_muted) {
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m->hwvol_muted = 0;
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mixer_set(m, m->hwvol_mixer, m->hwvol_mute_level);
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} else {
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m->hwvol_muted++;
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m->hwvol_mute_level = mixer_get(m, m->hwvol_mixer);
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mixer_set(m, m->hwvol_mixer, 0);
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}
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snd_mtxunlock(m->lock);
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}
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void
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mixer_hwvol_step(device_t dev, int left_step, int right_step)
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{
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struct snd_mixer *m;
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int level, left, right;
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dev_t pdev;
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pdev = mixer_get_devt(dev);
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m = pdev->si_drv1;
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snd_mtxlock(m->lock);
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if (m->hwvol_muted) {
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m->hwvol_muted = 0;
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level = m->hwvol_mute_level;
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} else
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level = mixer_get(m, m->hwvol_mixer);
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if (level != -1) {
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left = level & 0xff;
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right = level >> 8;
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left += left_step * m->hwvol_step;
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if (left < 0)
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left = 0;
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right += right_step * m->hwvol_step;
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if (right < 0)
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right = 0;
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mixer_set(m, m->hwvol_mixer, left | right << 8);
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}
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snd_mtxunlock(m->lock);
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}
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/* ----------------------------------------------------------------------- */
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static int
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mixer_open(dev_t i_dev, int flags, int mode, struct thread *td)
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{
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struct snd_mixer *m;
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intrmask_t s;
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m = i_dev->si_drv1;
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s = spltty();
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snd_mtxlock(m->lock);
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m->busy++;
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snd_mtxunlock(m->lock);
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splx(s);
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return 0;
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}
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static int
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mixer_close(dev_t i_dev, int flags, int mode, struct thread *td)
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{
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struct snd_mixer *m;
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intrmask_t s;
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m = i_dev->si_drv1;
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s = spltty();
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snd_mtxlock(m->lock);
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if (!m->busy) {
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snd_mtxunlock(m->lock);
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splx(s);
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return EBADF;
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}
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m->busy--;
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snd_mtxunlock(m->lock);
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splx(s);
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return 0;
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}
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int
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mixer_ioctl(dev_t i_dev, u_long cmd, caddr_t arg, int mode, struct thread *td)
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{
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struct snd_mixer *m;
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intrmask_t s;
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int ret, *arg_i = (int *)arg;
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int v = -1, j = cmd & 0xff;
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m = i_dev->si_drv1;
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if (!m->busy)
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return EBADF;
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s = spltty();
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snd_mtxlock(m->lock);
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if ((cmd & MIXER_WRITE(0)) == MIXER_WRITE(0)) {
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if (j == SOUND_MIXER_RECSRC)
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ret = mixer_setrecsrc(m, *arg_i);
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else
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ret = mixer_set(m, j, *arg_i);
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snd_mtxunlock(m->lock);
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splx(s);
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return (ret == 0)? 0 : ENXIO;
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}
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if ((cmd & MIXER_READ(0)) == MIXER_READ(0)) {
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switch (j) {
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case SOUND_MIXER_DEVMASK:
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case SOUND_MIXER_CAPS:
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case SOUND_MIXER_STEREODEVS:
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v = mix_getdevs(m);
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break;
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case SOUND_MIXER_RECMASK:
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v = mix_getrecdevs(m);
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break;
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case SOUND_MIXER_RECSRC:
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v = mixer_getrecsrc(m);
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break;
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default:
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v = mixer_get(m, j);
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}
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*arg_i = v;
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snd_mtxunlock(m->lock);
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return (v != -1)? 0 : ENXIO;
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}
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snd_mtxunlock(m->lock);
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splx(s);
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return ENXIO;
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}
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#ifdef USING_DEVFS
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static void
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mixer_clone(void *arg, char *name, int namelen, dev_t *dev)
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{
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dev_t pdev;
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if (*dev != NODEV)
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return;
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if (strcmp(name, "mixer") == 0) {
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pdev = makedev(SND_CDEV_MAJOR, PCMMKMINOR(snd_unit, SND_DEV_CTL, 0));
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if (pdev->si_flags & SI_NAMED)
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*dev = pdev;
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}
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}
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static void
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mixer_sysinit(void *p)
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{
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mixer_ehtag = EVENTHANDLER_REGISTER(dev_clone, mixer_clone, 0, 1000);
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}
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static void
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mixer_sysuninit(void *p)
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{
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if (mixer_ehtag != NULL)
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EVENTHANDLER_DEREGISTER(dev_clone, mixer_ehtag);
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}
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SYSINIT(mixer_sysinit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysinit, NULL);
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SYSUNINIT(mixer_sysuninit, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, mixer_sysuninit, NULL);
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#endif
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