freebsd-skq/sys/i386/isa/sound/sb_mixer.c
1994-08-02 07:55:43 +00:00

424 lines
9.5 KiB
C

/*
* sound/sb_mixer.c
*
* The low level mixer driver for the SoundBlaster Pro and SB16 cards.
*
* Copyright by Hannu Savolainen 1993
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer. 2.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Modified:
* Hunyue Yau Jan 6 1994
* Added code to support the Sound Galaxy NX Pro mixer.
*
* $Id$
*/
#include "sound_config.h"
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_SB) && !defined(EXCLUDE_SBPRO)
#define __SB_MIXER_C__
#include "sb.h"
#include "sb_mixer.h"
#undef SB_TEST_IRQ
extern int sbc_base;
static int mixer_initialized = 0;
static int supported_rec_devices;
static int supported_devices;
static int recmask = 0;
static int mixer_model;
static int mixer_caps;
static mixer_tab *iomap;
void
sb_setmixer (unsigned int port, unsigned int value)
{
unsigned long flags;
DISABLE_INTR (flags);
OUTB ((unsigned char) (port & 0xff), MIXER_ADDR); /* Select register */
tenmicrosec ();
OUTB ((unsigned char) (value & 0xff), MIXER_DATA);
tenmicrosec ();
RESTORE_INTR (flags);
}
int
sb_getmixer (unsigned int port)
{
int val;
unsigned long flags;
DISABLE_INTR (flags);
OUTB ((unsigned char) (port & 0xff), MIXER_ADDR); /* Select register */
tenmicrosec ();
val = INB (MIXER_DATA);
tenmicrosec ();
RESTORE_INTR (flags);
return val;
}
void
sb_mixer_set_stereo (int mode)
{
if (!mixer_initialized)
return;
sb_setmixer (OUT_FILTER, ((sb_getmixer (OUT_FILTER) & ~STEREO_DAC)
| (mode ? STEREO_DAC : MONO_DAC)));
}
/*
* Returns:
* 0 No mixer detected.
* 1 Only a plain Sound Blaster Pro style mixer detected.
* 2 The Sound Galaxy NX Pro mixer detected.
*/
static int
detect_mixer (void)
{
#ifdef __SGNXPRO__
int oldbass, oldtreble;
#endif
int retcode = 1;
/*
* Detect the mixer by changing parameters of two volume channels. If the
* values read back match with the values written, the mixer is there (is
* it?)
*/
sb_setmixer (FM_VOL, 0xff);
sb_setmixer (VOC_VOL, 0x33);
if (sb_getmixer (FM_VOL) != 0xff)
return 0; /* No match */
if (sb_getmixer (VOC_VOL) != 0x33)
return 0;
#ifdef __SGNXPRO__
/* Attempt to detect the SG NX Pro by check for valid bass/treble
* registers.
*/
oldbass = sb_getmixer (BASS_LVL);
oldtreble = sb_getmixer (TREBLE_LVL);
sb_setmixer (BASS_LVL, 0xaa);
sb_setmixer (TREBLE_LVL, 0x55);
if ((sb_getmixer (BASS_LVL) != 0xaa) ||
(sb_getmixer (TREBLE_LVL) != 0x55))
{
retcode = 1; /* 1 == Only SB Pro detected */
}
else
retcode = 2; /* 2 == SG NX Pro detected */
/* Restore register in either case since SG NX Pro has EEPROM with
* 'preferred' values stored.
*/
sb_setmixer (BASS_LVL, oldbass);
sb_setmixer (TREBLE_LVL, oldtreble);
#endif
return retcode;
}
static void
change_bits (unsigned char *regval, int dev, int chn, int newval)
{
unsigned char mask;
int shift;
mask = (1 << (*iomap)[dev][chn].nbits) - 1;
newval = ((newval * mask) + 50) / 100; /* Scale it */
shift = (*iomap)[dev][chn].bitoffs - (*iomap)[dev][LEFT_CHN].nbits + 1;
*regval &= ~(mask << shift); /* Filter out the previous value */
*regval |= (newval & mask) << shift; /* Set the new value */
}
static int
sb_mixer_get (int dev)
{
if (!((1 << dev) & supported_devices))
return RET_ERROR (EINVAL);
return levels[dev];
}
static int
sb_mixer_set (int dev, int value)
{
int left = value & 0x000000ff;
int right = (value & 0x0000ff00) >> 8;
int regoffs;
unsigned char val;
if (left > 100)
left = 100;
if (right > 100)
right = 100;
if (dev > 31)
return RET_ERROR (EINVAL);
if (!(supported_devices & (1 << dev))) /* Not supported */
return RET_ERROR (EINVAL);
regoffs = (*iomap)[dev][LEFT_CHN].regno;
if (regoffs == 0)
return RET_ERROR (EINVAL);
val = sb_getmixer (regoffs);
change_bits (&val, dev, LEFT_CHN, left);
levels[dev] = left | (left << 8);
if ((*iomap)[dev][RIGHT_CHN].regno != regoffs) /* Change register */
{
sb_setmixer (regoffs, val); /* Save the old one */
regoffs = (*iomap)[dev][RIGHT_CHN].regno;
if (regoffs == 0)
return left | (left << 8); /* Just left channel present */
val = sb_getmixer (regoffs); /* Read the new one */
}
change_bits (&val, dev, RIGHT_CHN, right);
sb_setmixer (regoffs, val);
levels[dev] = left | (right << 8);
return left | (right << 8);
}
static void
set_recsrc (int src)
{
sb_setmixer (RECORD_SRC, (sb_getmixer (RECORD_SRC) & ~7) | (src & 0x7));
}
static int
set_recmask (int mask)
{
int devmask, i;
unsigned char regimageL, regimageR;
devmask = mask & supported_rec_devices;
switch (mixer_model)
{
case 3:
if (devmask != SOUND_MASK_MIC &&
devmask != SOUND_MASK_LINE &&
devmask != SOUND_MASK_CD)
{ /* More than one devices selected. Drop the
* previous selection */
devmask &= ~recmask;
}
if (devmask != SOUND_MASK_MIC &&
devmask != SOUND_MASK_LINE &&
devmask != SOUND_MASK_CD)
{ /* More than one devices selected. Default to
* mic */
devmask = SOUND_MASK_MIC;
}
if (devmask ^ recmask) /* Input source changed */
{
switch (devmask)
{
case SOUND_MASK_MIC:
set_recsrc (SRC_MIC);
break;
case SOUND_MASK_LINE:
set_recsrc (SRC_LINE);
break;
case SOUND_MASK_CD:
set_recsrc (SRC_CD);
break;
default:
set_recsrc (SRC_MIC);
}
}
break;
case 4:
if (!devmask)
devmask = SOUND_MASK_MIC;
regimageL = regimageR = 0;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
if ((1 << i) & devmask)
{
regimageL |= sb16_recmasks_L[i];
regimageR |= sb16_recmasks_R[i];
}
sb_setmixer (SB16_IMASK_L, regimageL);
sb_setmixer (SB16_IMASK_R, regimageR);
break;
}
recmask = devmask;
return recmask;
}
static int
sb_mixer_ioctl (int dev, unsigned int cmd, unsigned int arg)
{
if (((cmd >> 8) & 0xff) == 'M')
{
if (cmd & IOC_IN)
switch (cmd & 0xff)
{
case SOUND_MIXER_RECSRC:
return IOCTL_OUT (arg, set_recmask (IOCTL_IN (arg)));
break;
default:
return IOCTL_OUT (arg, sb_mixer_set (cmd & 0xff, IOCTL_IN (arg)));
}
else
switch (cmd & 0xff) /* Return parameters */
{
case SOUND_MIXER_RECSRC:
return IOCTL_OUT (arg, recmask);
break;
case SOUND_MIXER_DEVMASK:
return IOCTL_OUT (arg, supported_devices);
break;
case SOUND_MIXER_STEREODEVS:
return IOCTL_OUT (arg, supported_devices &
~(SOUND_MASK_MIC | SOUND_MASK_SPEAKER));
break;
case SOUND_MIXER_RECMASK:
return IOCTL_OUT (arg, supported_rec_devices);
break;
case SOUND_MIXER_CAPS:
return IOCTL_OUT (arg, mixer_caps);
break;
default:
return IOCTL_OUT (arg, sb_mixer_get (cmd & 0xff));
}
}
else
return RET_ERROR (EINVAL);
}
static struct mixer_operations sb_mixer_operations =
{
sb_mixer_ioctl
};
static void
sb_mixer_reset (void)
{
int i;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
sb_mixer_set (i, levels[i]);
set_recmask (SOUND_MASK_MIC);
}
/*
* Returns a code depending on whether a SG NX Pro was detected.
* 0 == Plain SB 16 or SB Pro
* 1 == SG NX Pro detected.
*
* Used to update message.
*/
int
sb_mixer_init (int major_model)
{
int mixerstat;
sb_setmixer (0x00, 0); /* Reset mixer */
mixerstat = detect_mixer ();
if (!mixerstat)
return 0; /* No mixer. Why? */
mixer_initialized = 1;
mixer_model = major_model;
switch (major_model)
{
case 3:
mixer_caps = SOUND_CAP_EXCL_INPUT;
#ifdef __SGNXPRO__
if (mixerstat == 2)
{ /* A SGNXPRO was detected */
supported_devices = SGNXPRO_MIXER_DEVICES;
supported_rec_devices = SGNXPRO_RECORDING_DEVICES;
iomap = &sgnxpro_mix;
}
else
#endif
{ /* Otherwise plain SB Pro */
supported_devices = SBPRO_MIXER_DEVICES;
supported_rec_devices = SBPRO_RECORDING_DEVICES;
iomap = &sbpro_mix;
}
break;
case 4:
mixer_caps = 0;
supported_devices = SB16_MIXER_DEVICES;
supported_rec_devices = SB16_RECORDING_DEVICES;
iomap = &sb16_mix;
break;
default:
printk ("SB Warning: Unsupported mixer type\n");
return 0;
}
mixer_devs[num_mixers++] = &sb_mixer_operations;
sb_mixer_reset ();
return (mixerstat == 2);
}
#endif