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/*
* sound/ics2101.c
*
* Driver for the ICS2101 mixer of GUS v3.7.
*
*
* 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.
*
*
* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
* Bartlomiej Zolnierkiewicz : added __init to ics2101_mixer_init()
*/
#include <linux/init.h>
#include "sound_config.h"
#include <linux/ultrasound.h>
#include "gus.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)
{
int val;
if (((cmd >> 8) & 0xff) == 'M') {
if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
if (get_user(val, (int *)arg))
return -EFAULT;
switch (cmd & 0xff) {
case SOUND_MIXER_RECSRC:
return gus_default_mixer_ioctl(dev, cmd, arg);
case SOUND_MIXER_MIC:
val = set_volumes(DEV_MIC, val);
break;
case SOUND_MIXER_CD:
val = set_volumes(DEV_CD, val);
break;
case SOUND_MIXER_LINE:
val = set_volumes(DEV_LINE, val);
break;
case SOUND_MIXER_SYNTH:
val = set_volumes(DEV_GF1, val);
break;
case SOUND_MIXER_VOLUME:
val = set_volumes(DEV_VOL, val);
break;
default:
return -EINVAL;
}
return put_user(val, (int *)arg);
} else {
switch (cmd & 0xff) {
/*
* Return parameters
*/
case SOUND_MIXER_RECSRC:
return gus_default_mixer_ioctl(dev, cmd, arg);
case SOUND_MIXER_DEVMASK:
val = MIX_DEVS;
break;
case SOUND_MIXER_STEREODEVS:
val = SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC;
break;
case SOUND_MIXER_RECMASK:
val = SOUND_MASK_MIC | SOUND_MASK_LINE;
break;
case SOUND_MIXER_CAPS:
val = 0;
break;
case SOUND_MIXER_MIC:
val = volumes[DEV_MIC];
break;
case SOUND_MIXER_LINE:
val = volumes[DEV_LINE];
break;
case SOUND_MIXER_CD:
val = volumes[DEV_CD];
break;
case SOUND_MIXER_VOLUME:
val = volumes[DEV_VOL];
break;
case SOUND_MIXER_SYNTH:
val = volumes[DEV_GF1];
break;
default:
return -EINVAL;
}
return put_user(val, (int *)arg);
}
}
return -EINVAL;
}
static struct mixer_operations ics2101_mixer_operations =
{
owner: THIS_MODULE,
id: "ICS2101",
name: "ICS2101 Multimedia Mixer",
ioctl: ics2101_mixer_ioctl
};
int __init ics2101_mixer_init(void)
{
int i;
int n;
if ((n = sound_alloc_mixerdev()) != -1)
{
mixer_devs[n] = &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);
}
return n;
}
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