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/*
* sound/ics2101.c
*
* Driver for the ICS2101 mixer of GUS v3.7.
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1996
*
* USS/Lite 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"
#if defined(CONFIG_GUS)
#include <linux/ultrasound.h>
#include "gus_hw.h"
#define MIX_DEVS (SOUND_MASK_MIC|SOUND_MASK_LINE| \
SOUND_MASK_SYNTH| \
SOUND_MASK_CD | SOUND_MASK_VOLUME)
extern int *gus_osp;
extern int gus_base;
static int volumes[ICS_MIXDEVS];
static int left_fix[ICS_MIXDEVS] =
{1, 1, 1, 2, 1, 2};
static int right_fix[ICS_MIXDEVS] =
{2, 2, 2, 1, 2, 1};
static int
scale_vol (int vol)
{
/*
* Experimental volume scaling by Risto Kankkunen.
* This should give smoother volume response than just
* a plain multiplication.
*/
int e;
if (vol < 0)
vol = 0;
if (vol > 100)
vol = 100;
vol = (31 * vol + 50) / 100;
e = 0;
if (vol)
{
while (vol < 16)
{
vol <<= 1;
e--;
}
vol -= 16;
e += 7;
}
return ((e << 4) + vol);
}
static void
write_mix (int dev, int chn, int vol)
{
int *selector;
unsigned long flags;
int ctrl_addr = dev << 3;
int attn_addr = dev << 3;
vol = scale_vol (vol);
if (chn == CHN_LEFT)
{
selector = left_fix;
ctrl_addr |= 0x00;
attn_addr |= 0x02;
}
else
{
selector = right_fix;
ctrl_addr |= 0x01;
attn_addr |= 0x03;
}
save_flags (flags);
cli ();
outb (ctrl_addr, u_MixSelect);
outb (selector[dev], u_MixData);
outb (attn_addr, u_MixSelect);
outb ((unsigned char) vol, u_MixData);
restore_flags (flags);
}
static int
set_volumes (int dev, int vol)
{
int left = vol & 0x00ff;
int right = (vol >> 8) & 0x00ff;
if (left < 0)
left = 0;
if (left > 100)
left = 100;
if (right < 0)
right = 0;
if (right > 100)
right = 100;
write_mix (dev, CHN_LEFT, left);
write_mix (dev, CHN_RIGHT, right);
vol = left + (right << 8);
volumes[dev] = vol;
return vol;
}
static int
ics2101_mixer_ioctl (int dev, unsigned int cmd, caddr_t arg)
{
if (((cmd >> 8) & 0xff) == 'M')
{
if (_IOC_DIR (cmd) & _IOC_WRITE)
switch (cmd & 0xff)
{
case SOUND_MIXER_RECSRC:
return gus_default_mixer_ioctl (dev, cmd, arg);
break;
case SOUND_MIXER_MIC:
return snd_ioctl_return ((int *) arg, set_volumes (DEV_MIC, get_user ((int *) arg)));
break;
case SOUND_MIXER_CD:
return snd_ioctl_return ((int *) arg, set_volumes (DEV_CD, get_user ((int *) arg)));
break;
case SOUND_MIXER_LINE:
return snd_ioctl_return ((int *) arg, set_volumes (DEV_LINE, get_user ((int *) arg)));
break;
case SOUND_MIXER_SYNTH:
return snd_ioctl_return ((int *) arg, set_volumes (DEV_GF1, get_user ((int *) arg)));
break;
case SOUND_MIXER_VOLUME:
return snd_ioctl_return ((int *) arg, set_volumes (DEV_VOL, get_user ((int *) arg)));
break;
default:
return -(EINVAL);
}
else
switch (cmd & 0xff) /*
* Return parameters
*/
{
case SOUND_MIXER_RECSRC:
return gus_default_mixer_ioctl (dev, cmd, arg);
break;
case SOUND_MIXER_DEVMASK:
return snd_ioctl_return ((int *) arg, MIX_DEVS);
break;
case SOUND_MIXER_STEREODEVS:
return snd_ioctl_return ((int *) arg, SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC);
break;
case SOUND_MIXER_RECMASK:
return snd_ioctl_return ((int *) arg, SOUND_MASK_MIC | SOUND_MASK_LINE);
break;
case SOUND_MIXER_CAPS:
return snd_ioctl_return ((int *) arg, 0);
break;
case SOUND_MIXER_MIC:
return snd_ioctl_return ((int *) arg, volumes[DEV_MIC]);
break;
case SOUND_MIXER_LINE:
return snd_ioctl_return ((int *) arg, volumes[DEV_LINE]);
break;
case SOUND_MIXER_CD:
return snd_ioctl_return ((int *) arg, volumes[DEV_CD]);
break;
case SOUND_MIXER_VOLUME:
return snd_ioctl_return ((int *) arg, volumes[DEV_VOL]);
break;
case SOUND_MIXER_SYNTH:
return snd_ioctl_return ((int *) arg, volumes[DEV_GF1]);
break;
default:
return -(EINVAL);
}
}
return -(EINVAL);
}
static struct mixer_operations ics2101_mixer_operations =
{
"ICS2101",
"ICS2101 Multimedia Mixer",
ics2101_mixer_ioctl
};
void
ics2101_mixer_init (void)
{
int i;
if (num_mixers < MAX_MIXER_DEV)
{
mixer_devs[num_mixers++] = &ics2101_mixer_operations;
/*
* Some GUS v3.7 cards had some channels flipped. Disable
* the flipping feature if the model id is other than 5.
*/
if (inb (u_MixSelect) != 5)
{
for (i = 0; i < ICS_MIXDEVS; i++)
left_fix[i] = 1;
for (i = 0; i < ICS_MIXDEVS; i++)
right_fix[i] = 2;
}
set_volumes (DEV_GF1, 0x5a5a);
set_volumes (DEV_CD, 0x5a5a);
set_volumes (DEV_MIC, 0x0000);
set_volumes (DEV_LINE, 0x5a5a);
set_volumes (DEV_VOL, 0x5a5a);
set_volumes (DEV_UNUSED, 0x0000);
}
}
#endif
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