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Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
247 lines
4.7 KiB
C
247 lines
4.7 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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*
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* Copyright (C) by Hannu Savolainen 1993-1997
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*
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* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
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* Version 2 (June 1991). See the "COPYING" file distributed with this software
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* for more info.
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*
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*
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* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
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* Bartlomiej Zolnierkiewicz : added __init to ics2101_mixer_init()
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*/
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include "sound_config.h"
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#include <linux/ultrasound.h>
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#include "gus.h"
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#include "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_osp;
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extern int gus_base;
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extern spinlock_t gus_lock;
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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 scale_vol(int vol)
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{
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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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}
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static void 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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spin_lock_irqsave(&gus_lock, 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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spin_unlock_irqrestore(&gus_lock,flags);
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}
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static int 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 ics2101_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
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{
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int val;
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if (((cmd >> 8) & 0xff) == 'M') {
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if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
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if (get_user(val, (int __user *)arg))
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return -EFAULT;
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switch (cmd & 0xff) {
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case SOUND_MIXER_RECSRC:
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return gus_default_mixer_ioctl(dev, cmd, arg);
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case SOUND_MIXER_MIC:
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val = set_volumes(DEV_MIC, val);
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break;
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case SOUND_MIXER_CD:
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val = set_volumes(DEV_CD, val);
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break;
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case SOUND_MIXER_LINE:
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val = set_volumes(DEV_LINE, val);
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break;
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case SOUND_MIXER_SYNTH:
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val = set_volumes(DEV_GF1, val);
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break;
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case SOUND_MIXER_VOLUME:
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val = set_volumes(DEV_VOL, val);
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break;
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default:
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return -EINVAL;
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}
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return put_user(val, (int __user *)arg);
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} else {
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switch (cmd & 0xff) {
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/*
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* Return parameters
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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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case SOUND_MIXER_DEVMASK:
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val = MIX_DEVS;
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break;
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case SOUND_MIXER_STEREODEVS:
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val = SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_SYNTH | SOUND_MASK_VOLUME | SOUND_MASK_MIC;
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break;
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case SOUND_MIXER_RECMASK:
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val = SOUND_MASK_MIC | SOUND_MASK_LINE;
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break;
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case SOUND_MIXER_CAPS:
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val = 0;
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break;
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case SOUND_MIXER_MIC:
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val = volumes[DEV_MIC];
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break;
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case SOUND_MIXER_LINE:
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val = volumes[DEV_LINE];
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break;
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case SOUND_MIXER_CD:
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val = volumes[DEV_CD];
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break;
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case SOUND_MIXER_VOLUME:
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val = volumes[DEV_VOL];
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break;
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case SOUND_MIXER_SYNTH:
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val = volumes[DEV_GF1];
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break;
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default:
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return -EINVAL;
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}
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return put_user(val, (int __user *)arg);
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}
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}
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return -EINVAL;
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}
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static struct mixer_operations ics2101_mixer_operations =
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{
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.owner = THIS_MODULE,
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.id = "ICS2101",
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.name = "ICS2101 Multimedia Mixer",
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.ioctl = ics2101_mixer_ioctl
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};
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int __init ics2101_mixer_init(void)
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{
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int i;
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int n;
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if ((n = sound_alloc_mixerdev()) != -1)
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{
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mixer_devs[n] = &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 n;
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}
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