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* sound/sound_switch.c
*
* The system call switch handler
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*/
#include <linux/config.h>
#include "sound_config.h"
static int in_use = 0; /* Total # of open devices */
/*
* Table for configurable mixer volume handling
*/
static mixer_vol_table mixer_vols[MAX_MIXER_DEV];
static int num_mixer_volumes = 0;
/*
* /dev/sndstatus -device
*/
static char *status_buf = NULL;
static int status_len, status_ptr;
static int status_busy = 0;
int
*
load_mixer_volumes (char *name, int *levels, int present)
{
int i, n;
for (i = 0; i < num_mixer_volumes; i++)
if (strcmp (name, mixer_vols[i].name) == 0)
{
if (present)
mixer_vols[i].num = i;
return mixer_vols[i].levels;
}
if (num_mixer_volumes >= MAX_MIXER_DEV)
{
printk ("Sound: Too many mixers (%s)\n", name);
return levels;
}
n = num_mixer_volumes++;
strcpy (mixer_vols[n].name, name);
if (present)
mixer_vols[n].num = n;
else
mixer_vols[n].num = -1;
for (i = 0; i < 32; i++)
mixer_vols[n].levels[i] = levels[i];
return mixer_vols[n].levels;
}
static int
set_mixer_levels (caddr_t arg)
{
mixer_vol_table *buf = NULL;
int err = 0;
if ((buf = (mixer_vol_table *) vmalloc (sizeof (mixer_vol_table))) == NULL)
return -ENOSPC;
memcpy ((char *) buf, (&((char *) arg)[0]), sizeof (*buf));
load_mixer_volumes (buf->name, buf->levels, 0);
memcpy ((&((char *) arg)[0]), (char *) buf, sizeof (*buf));
vfree (buf);
return err;
}
static int
get_mixer_levels (caddr_t arg)
{
mixer_vol_table *buf = NULL;
int n, err = 0;
if ((buf = (mixer_vol_table *) vmalloc (sizeof (mixer_vol_table))) == NULL)
return -ENOSPC;
memcpy ((char *) buf, (&((char *) arg)[0]), sizeof (*buf));
n = buf->num;
if (n < 0 || n >= num_mixer_volumes)
err = -EINVAL;
else
{
memcpy ((char *) buf, (char *) &mixer_vols[n], sizeof (*buf));
}
memcpy ((&((char *) arg)[0]), (char *) buf, sizeof (*buf));
vfree (buf);
return err;
}
static int
put_status (char *s)
{
int l = strlen (s);
if (status_len + l >= 4000)
return 0;
memcpy (&status_buf[status_len], s, l);
status_len += l;
return 1;
}
static int
put_status_int (unsigned int val, int radix)
{
int l, v;
static char hx[] = "0123456789abcdef";
char buf[11];
if (!val)
return put_status ("0");
l = 0;
buf[10] = 0;
while (val)
{
v = val % radix;
val = val / radix;
buf[9 - l] = hx[v];
l++;
}
if (status_len + l >= 4000)
return 0;
memcpy (&status_buf[status_len], &buf[10 - l], l);
status_len += l;
return 1;
}
static void
init_status (void)
{
/*
* Write the status information to the status_buf and update status_len.
* There is a limit of 4000 bytes for the data.
*/
int i;
status_ptr = 0;
#ifdef SOUND_UNAME_A
put_status ("Sound Driver:" SOUND_VERSION_STRING
" (" SOUND_CONFIG_DATE " " SOUND_CONFIG_BY ",\n"
SOUND_UNAME_A ")"
"\n");
#else
put_status ("Sound Driver:" SOUND_VERSION_STRING
" (" SOUND_CONFIG_DATE " " SOUND_CONFIG_BY "@"
SOUND_CONFIG_HOST "." SOUND_CONFIG_DOMAIN ")"
"\n");
#endif
put_status ("Kernel: ");
put_status (system_utsname.sysname);
put_status (" ");
put_status (system_utsname.nodename);
put_status (" ");
put_status (system_utsname.release);
put_status (" ");
put_status (system_utsname.version);
put_status (" ");
put_status (system_utsname.machine);
put_status ("\n");
if (!put_status ("Config options: "))
return;
if (!put_status_int (SELECTED_SOUND_OPTIONS, 16))
return;
if (!put_status ("\n\nInstalled drivers: \n"))
return;
for (i = 0; i < num_sound_drivers; i++)
if (sound_drivers[i].card_type != 0)
{
if (!put_status ("Type "))
return;
if (!put_status_int (sound_drivers[i].card_type, 10))
return;
if (!put_status (": "))
return;
if (!put_status (sound_drivers[i].name))
return;
if (!put_status ("\n"))
return;
}
if (!put_status ("\nCard config: \n"))
return;
for (i = 0; i < num_sound_cards; i++)
if (snd_installed_cards[i].card_type != 0)
{
int drv, tmp;
if (!snd_installed_cards[i].enabled)
if (!put_status ("("))
return;
/*
* if (!put_status_int(snd_installed_cards[i].card_type, 10)) return;
* if (!put_status (": ")) return;
*/
if ((drv = snd_find_driver (snd_installed_cards[i].card_type)) != -1)
if (!put_status (sound_drivers[drv].name))
return;
if (snd_installed_cards[i].config.io_base)
{
if (!put_status (" at 0x"))
return;
if (!put_status_int (snd_installed_cards[i].config.io_base, 16))
return;
}
tmp = snd_installed_cards[i].config.irq;
if (tmp != 0)
{
if (!put_status (" irq "))
return;
if (tmp < 0)
tmp = -tmp;
if (!put_status_int (tmp, 10))
return;
}
if (snd_installed_cards[i].config.dma != -1)
{
if (!put_status (" drq "))
return;
if (!put_status_int (snd_installed_cards[i].config.dma, 10))
return;
if (snd_installed_cards[i].config.dma2 != -1)
{
if (!put_status (","))
return;
if (!put_status_int (snd_installed_cards[i].config.dma2, 10))
return;
}
}
if (!snd_installed_cards[i].enabled)
if (!put_status (")"))
return;
if (!put_status ("\n"))
return;
}
if (!sound_started)
{
put_status ("\n\n***** Sound driver not started *****\n\n");
return;
}
#ifndef CONFIG_AUDIO
if (!put_status ("\nAudio devices: NOT ENABLED IN CONFIG\n"))
return;
#else
if (!put_status ("\nAudio devices:\n"))
return;
for (i = 0; i < num_audiodevs; i++)
{
if (!put_status_int (i, 10))
return;
if (!put_status (": "))
return;
if (!put_status (audio_devs[i]->name))
return;
if (audio_devs[i]->flags & DMA_DUPLEX)
if (!put_status (" (DUPLEX)"))
return;
if (!put_status ("\n"))
return;
}
#endif
#ifndef CONFIG_SEQUENCER
if (!put_status ("\nSynth devices: NOT ENABLED IN CONFIG\n"))
return;
#else
if (!put_status ("\nSynth devices:\n"))
return;
for (i = 0; i < num_synths; i++)
{
if (!put_status_int (i, 10))
return;
if (!put_status (": "))
return;
if (!put_status (synth_devs[i]->info->name))
return;
if (!put_status ("\n"))
return;
}
#endif
#ifndef CONFIG_MIDI
if (!put_status ("\nMidi devices: NOT ENABLED IN CONFIG\n"))
return;
#else
if (!put_status ("\nMidi devices:\n"))
return;
for (i = 0; i < num_midis; i++)
{
if (!put_status_int (i, 10))
return;
if (!put_status (": "))
return;
if (!put_status (midi_devs[i]->info.name))
return;
if (!put_status ("\n"))
return;
}
#endif
#ifdef CONFIG_SEQUENCER
if (!put_status ("\nTimers:\n"))
return;
for (i = 0; i < num_sound_timers; i++)
{
if (!put_status_int (i, 10))
return;
if (!put_status (": "))
return;
if (!put_status (sound_timer_devs[i]->info.name))
return;
if (!put_status ("\n"))
return;
}
#endif
if (!put_status ("\nMixers:\n"))
return;
for (i = 0; i < num_mixers; i++)
{
if (!put_status_int (i, 10))
return;
if (!put_status (": "))
return;
if (!put_status (mixer_devs[i]->name))
return;
if (!put_status ("\n"))
return;
}
}
static int
read_status (char *buf, int count)
{
/*
* Return at most 'count' bytes from the status_buf.
*/
int l, c;
l = count;
c = status_len - status_ptr;
if (l > c)
l = c;
if (l <= 0)
return 0;
{
char *fixit = &status_buf[status_ptr];
copy_to_user (&(buf)[0], fixit, l);
};
status_ptr += l;
return l;
}
int
sound_read_sw (int dev, struct fileinfo *file, char *buf, int count)
{
DEB (printk ("sound_read_sw(dev=%d, count=%d)\n", dev, count));
switch (dev & 0x0f)
{
case SND_DEV_STATUS:
return read_status (buf, count);
break;
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
return audio_read (dev, file, buf, count);
break;
#endif
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
return sequencer_read (dev, file, buf, count);
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
return MIDIbuf_read (dev, file, buf, count);
#endif
default:;
}
return -EINVAL;
}
int
sound_write_sw (int dev, struct fileinfo *file, const char *buf, int count)
{
DEB (printk ("sound_write_sw(dev=%d, count=%d)\n", dev, count));
switch (dev & 0x0f)
{
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
return sequencer_write (dev, file, buf, count);
break;
#endif
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
return audio_write (dev, file, buf, count);
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
return MIDIbuf_write (dev, file, buf, count);
#endif
}
return -EINVAL;
}
int
sound_open_sw (int dev, struct fileinfo *file)
{
int retval;
DEB (printk ("sound_open_sw(dev=%d)\n", dev));
if ((dev >= SND_NDEVS) || (dev < 0))
{
printk ("Invalid minor device %d\n", dev);
return -ENXIO;
}
switch (dev & 0x0f)
{
case SND_DEV_STATUS:
if (status_busy)
return -EBUSY;
status_busy = 1;
if ((status_buf = (char *) vmalloc (4000)) == NULL)
return -EIO;
status_len = status_ptr = 0;
init_status ();
break;
case SND_DEV_CTL:
if ((dev & 0xf0) && ((dev & 0xf0) >> 4) >= num_mixers)
return -ENXIO;
return 0;
break;
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
if ((retval = sequencer_open (dev, file)) < 0)
return retval;
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
if ((retval = MIDIbuf_open (dev, file)) < 0)
return retval;
break;
#endif
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
if ((retval = audio_open (dev, file)) < 0)
return retval;
break;
#endif
default:
printk ("Invalid minor device %d\n", dev);
return -ENXIO;
}
in_use++;
return 0;
}
void
sound_release_sw (int dev, struct fileinfo *file)
{
DEB (printk ("sound_release_sw(dev=%d)\n", dev));
switch (dev & 0x0f)
{
case SND_DEV_STATUS:
if (status_buf)
vfree (status_buf);
status_buf = NULL;
status_busy = 0;
break;
case SND_DEV_CTL:
break;
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
sequencer_release (dev, file);
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
MIDIbuf_release (dev, file);
break;
#endif
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
audio_release (dev, file);
break;
#endif
default:
printk ("Sound error: Releasing unknown device 0x%02x\n", dev);
}
in_use--;
}
static int
get_mixer_info (int dev, caddr_t arg)
{
mixer_info info;
if (dev < 0 || dev >= num_mixers)
return -ENXIO;
strcpy (info.id, mixer_devs[dev]->id);
strcpy (info.name, mixer_devs[dev]->name);
info.modify_counter = mixer_devs[dev]->modify_counter;
memcpy ((&((char *) arg)[0]), (char *) &info, sizeof (info));
return 0;
}
static int
get_old_mixer_info (int dev, caddr_t arg)
{
_old_mixer_info info;
if (dev < 0 || dev >= num_mixers)
return -ENXIO;
strcpy (info.id, mixer_devs[dev]->id);
strcpy (info.name, mixer_devs[dev]->name);
memcpy ((&((char *) arg)[0]), (char *) &info, sizeof (info));
return 0;
}
static int
sound_mixer_ioctl (int mixdev,
unsigned int cmd, caddr_t arg)
{
if (cmd == SOUND_MIXER_INFO)
return get_mixer_info (mixdev, arg);
if (cmd == SOUND_OLD_MIXER_INFO)
return get_old_mixer_info (mixdev, arg);
if (_SIOC_DIR (cmd) & _SIOC_WRITE)
mixer_devs[mixdev]->modify_counter++;
return mixer_devs[mixdev]->ioctl (mixdev, cmd, arg);
}
int
sound_ioctl_sw (int dev, struct fileinfo *file,
unsigned int cmd, caddr_t arg)
{
DEB (printk ("sound_ioctl_sw(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
if (cmd == OSS_GETVERSION)
return (*(int *) arg = SOUND_VERSION);
if (((cmd >> 8) & 0xff) == 'M' && num_mixers > 0) /* Mixer ioctl */
if ((dev & 0x0f) != SND_DEV_CTL)
{
int dtype = dev & 0x0f;
int mixdev;
switch (dtype)
{
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
mixdev = audio_devs[dev >> 4]->mixer_dev;
if (mixdev < 0 || mixdev >= num_mixers)
return -ENXIO;
return sound_mixer_ioctl (mixdev, cmd, arg);
break;
#endif
default:
return sound_mixer_ioctl (dev, cmd, arg);
}
}
switch (dev & 0x0f)
{
case SND_DEV_CTL:
if (cmd == SOUND_MIXER_GETLEVELS)
return get_mixer_levels (arg);
if (cmd == SOUND_MIXER_SETLEVELS)
return set_mixer_levels (arg);
if (!num_mixers)
return -ENXIO;
dev = dev >> 4;
if (dev >= num_mixers)
return -ENXIO;
return sound_mixer_ioctl (dev, cmd, arg);
break;
#ifdef CONFIG_SEQUENCER
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
return sequencer_ioctl (dev, file, cmd, arg);
break;
#endif
#ifdef CONFIG_AUDIO
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
return audio_ioctl (dev, file, cmd, arg);
break;
#endif
#ifdef CONFIG_MIDI
case SND_DEV_MIDIN:
return MIDIbuf_ioctl (dev, file, cmd, arg);
break;
#endif
}
return -EINVAL;
}
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