265 lines
6.1 KiB
C
265 lines
6.1 KiB
C
/*
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* sound/ics2101.c
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*
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* Driver for the ICS2101 mixer of GUS v3.7.
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*
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* Copyright by Hannu Savolainen 1994
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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 are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* 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 ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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*/
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#include <i386/isa/sound/sound_config.h>
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#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_GUS)
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#include <machine/ultrasound.h>
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#include <i386/isa/sound/gus_hw.h>
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#define MIX_DEVS (SOUND_MASK_MIC|SOUND_MASK_LINE| \
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SOUND_MASK_SYNTH| \
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SOUND_MASK_CD | SOUND_MASK_VOLUME)
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extern int gus_base;
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static int volumes[ICS_MIXDEVS];
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static int left_fix[ICS_MIXDEVS] =
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{1, 1, 1, 2, 1, 2};
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static int right_fix[ICS_MIXDEVS] =
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{2, 2, 2, 1, 2, 1};
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static int
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scale_vol (int vol)
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{
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#if 1
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/*
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* Experimental volume scaling by Risto Kankkunen.
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* This should give smoother volume response than just
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* a plain multiplication.
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*/
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int e;
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if (vol < 0)
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vol = 0;
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if (vol > 100)
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vol = 100;
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vol = (31 * vol + 50) / 100;
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e = 0;
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if (vol)
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{
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while (vol < 16)
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{
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vol <<= 1;
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e--;
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}
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vol -= 16;
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e += 7;
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}
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return ((e << 4) + vol);
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#else
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return ((vol * 127) + 50) / 100;
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#endif
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}
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static void
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write_mix (int dev, int chn, int vol)
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{
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int *selector;
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unsigned long flags;
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int ctrl_addr = dev << 3;
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int attn_addr = dev << 3;
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vol = scale_vol (vol);
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if (chn == CHN_LEFT)
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{
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selector = left_fix;
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ctrl_addr |= 0x00;
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attn_addr |= 0x02;
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}
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else
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{
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selector = right_fix;
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ctrl_addr |= 0x01;
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attn_addr |= 0x03;
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}
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DISABLE_INTR (flags);
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OUTB (ctrl_addr, u_MixSelect);
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OUTB (selector[dev], u_MixData);
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OUTB (attn_addr, u_MixSelect);
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OUTB ((unsigned char) vol, u_MixData);
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RESTORE_INTR (flags);
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}
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static int
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set_volumes (int dev, int vol)
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{
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int left = vol & 0x00ff;
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int right = (vol >> 8) & 0x00ff;
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if (left < 0)
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left = 0;
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if (left > 100)
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left = 100;
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if (right < 0)
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right = 0;
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if (right > 100)
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right = 100;
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write_mix (dev, CHN_LEFT, left);
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write_mix (dev, CHN_RIGHT, right);
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vol = left + (right << 8);
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volumes[dev] = vol;
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return vol;
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}
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static int
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ics2101_mixer_ioctl (int dev, unsigned int cmd, unsigned int arg)
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{
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if (((cmd >> 8) & 0xff) == 'M')
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{
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if (cmd & IOC_IN)
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switch (cmd & 0xff)
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{
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case SOUND_MIXER_RECSRC:
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return gus_default_mixer_ioctl (dev, cmd, arg);
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break;
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case SOUND_MIXER_MIC:
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return IOCTL_OUT (arg, set_volumes (DEV_MIC, IOCTL_IN (arg)));
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break;
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case SOUND_MIXER_CD:
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return IOCTL_OUT (arg, set_volumes (DEV_CD, IOCTL_IN (arg)));
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break;
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case SOUND_MIXER_LINE:
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return IOCTL_OUT (arg, set_volumes (DEV_LINE, IOCTL_IN (arg)));
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break;
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case SOUND_MIXER_SYNTH:
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return IOCTL_OUT (arg, set_volumes (DEV_GF1, IOCTL_IN (arg)));
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break;
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case SOUND_MIXER_VOLUME:
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return IOCTL_OUT (arg, set_volumes (DEV_VOL, IOCTL_IN (arg)));
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break;
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default:
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return RET_ERROR (EINVAL);
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}
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else
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switch (cmd & 0xff) /*
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* Return parameters
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*/
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{
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case SOUND_MIXER_RECSRC:
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return gus_default_mixer_ioctl (dev, cmd, arg);
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break;
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case SOUND_MIXER_DEVMASK:
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return IOCTL_OUT (arg, MIX_DEVS);
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break;
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case SOUND_MIXER_STEREODEVS:
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return IOCTL_OUT (arg, SOUND_MASK_LINE | SOUND_MASK_CD |
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SOUND_MASK_SYNTH | SOUND_MASK_VOLUME |
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SOUND_MASK_MIC);
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break;
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case SOUND_MIXER_RECMASK:
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return IOCTL_OUT (arg, SOUND_MASK_MIC | SOUND_MASK_LINE);
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break;
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case SOUND_MIXER_CAPS:
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return IOCTL_OUT (arg, 0);
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break;
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case SOUND_MIXER_MIC:
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return IOCTL_OUT (arg, volumes[DEV_MIC]);
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break;
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case SOUND_MIXER_LINE:
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return IOCTL_OUT (arg, volumes[DEV_LINE]);
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break;
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case SOUND_MIXER_CD:
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return IOCTL_OUT (arg, volumes[DEV_CD]);
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break;
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case SOUND_MIXER_VOLUME:
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return IOCTL_OUT (arg, volumes[DEV_VOL]);
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break;
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case SOUND_MIXER_SYNTH:
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return IOCTL_OUT (arg, volumes[DEV_GF1]);
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break;
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default:
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return RET_ERROR (EINVAL);
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}
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}
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return RET_ERROR (EINVAL);
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}
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static struct mixer_operations ics2101_mixer_operations =
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{
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"ICS2101 Multimedia Mixer",
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ics2101_mixer_ioctl
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};
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long
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ics2101_mixer_init (long mem_start)
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{
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int i;
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if (num_mixers < MAX_MIXER_DEV)
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{
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mixer_devs[num_mixers++] = &ics2101_mixer_operations;
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/*
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* Some GUS v3.7 cards had some channels flipped. Disable
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* the flipping feature if the model id is other than 5.
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*/
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if (INB (u_MixSelect) != 5)
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{
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for (i = 0; i < ICS_MIXDEVS; i++)
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left_fix[i] = 1;
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for (i = 0; i < ICS_MIXDEVS; i++)
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right_fix[i] = 2;
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}
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set_volumes (DEV_GF1, 0x5a5a);
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set_volumes (DEV_CD, 0x5a5a);
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set_volumes (DEV_MIC, 0x0000);
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set_volumes (DEV_LINE, 0x5a5a);
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set_volumes (DEV_VOL, 0x5a5a);
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set_volumes (DEV_UNUSED, 0x0000);
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}
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return mem_start;
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}
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#endif
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