pas2_mixer.c

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/*
 * sound/oss/pas2_mixer.c
 *
 * Mixer routines for the Pro Audio Spectrum cards.
 */

/*
 * 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 pas_init_mixer()
 */
#include <linux/init.h>
#include "sound_config.h"

#include "pas2.h"

#ifndef DEB
#define DEB(what)       /* (what) */
#endif

extern int      pas_translate_code;
extern char     pas_model;
extern int     *pas_osp;
extern int      pas_audiodev;

static int      rec_devices = (SOUND_MASK_MIC);     /* Default recording source */
static int      mode_control;

#define POSSIBLE_RECORDING_DEVICES  (SOUND_MASK_SYNTH | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
                     SOUND_MASK_CD | SOUND_MASK_ALTPCM)

#define SUPPORTED_MIXER_DEVICES     (SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
                     SOUND_MASK_CD | SOUND_MASK_ALTPCM | SOUND_MASK_IMIX | \
                     SOUND_MASK_VOLUME | SOUND_MASK_BASS | SOUND_MASK_TREBLE | SOUND_MASK_RECLEV)

static int     *levels;

static int      default_levels[32] =
{
    0x3232,         /* Master Volume */
    0x3232,         /* Bass */
    0x3232,         /* Treble */
    0x5050,         /* FM */
    0x4b4b,         /* PCM */
    0x3232,         /* PC Speaker */
    0x4b4b,         /* Ext Line */
    0x4b4b,         /* Mic */
    0x4b4b,         /* CD */
    0x6464,         /* Recording monitor */
    0x4b4b,         /* SB PCM */
    0x6464          /* Recording level */
};

void
mix_write(unsigned char data, int ioaddr)
{
    /*
     * The Revision D cards have a problem with their MVA508 interface. The
     * kludge-o-rama fix is to make a 16-bit quantity with identical LSB and
     * MSBs out of the output byte and to do a 16-bit out to the mixer port -
     * 1. We need to do this because it isn't timing problem but chip access
     * sequence problem.
     */

    if (pas_model == 4)
      {
          outw(data | (data << 8), (ioaddr + pas_translate_code) - 1);
          outb((0x80), 0);
    } else
        pas_write(data, ioaddr);
}

static int
mixer_output(int right_vol, int left_vol, int div, int bits,
         int mixer)     /* Input or output mixer */
{
    int             left = left_vol * div / 100;
    int             right = right_vol * div / 100;


    if (bits & 0x10)
      {
          left |= mixer;
          right |= mixer;
      }
    if (bits == 0x03 || bits == 0x04)
      {
          mix_write(0x80 | bits, 0x078B);
          mix_write(left, 0x078B);
          right_vol = left_vol;
    } else
      {
          mix_write(0x80 | 0x20 | bits, 0x078B);
          mix_write(left, 0x078B);
          mix_write(0x80 | 0x40 | bits, 0x078B);
          mix_write(right, 0x078B);
      }

    return (left_vol | (right_vol << 8));
}

static void
set_mode(int new_mode)
{
    mix_write(0x80 | 0x05, 0x078B);
    mix_write(new_mode, 0x078B);

    mode_control = new_mode;
}

static int
pas_mixer_set(int whichDev, unsigned int level)
{
    int             left, right, devmask, changed, i, mixer = 0;

    DEB(printk("static int pas_mixer_set(int whichDev = %d, unsigned int level = %X)\n", whichDev, level));

    left = level & 0x7f;
    right = (level & 0x7f00) >> 8;

    if (whichDev < SOUND_MIXER_NRDEVICES) {
        if ((1 << whichDev) & rec_devices)
            mixer = 0x20;
        else
            mixer = 0x00;
    }

    switch (whichDev)
      {
      case SOUND_MIXER_VOLUME:  /* Master volume (0-63) */
          levels[whichDev] = mixer_output(right, left, 63, 0x01, 0);
          break;

          /*
           * Note! Bass and Treble are mono devices. Will use just the left
           * channel.
           */
      case SOUND_MIXER_BASS:    /* Bass (0-12) */
          levels[whichDev] = mixer_output(right, left, 12, 0x03, 0);
          break;
      case SOUND_MIXER_TREBLE:  /* Treble (0-12) */
          levels[whichDev] = mixer_output(right, left, 12, 0x04, 0);
          break;

      case SOUND_MIXER_SYNTH:   /* Internal synthesizer (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x00, mixer);
          break;
      case SOUND_MIXER_PCM: /* PAS PCM (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x05, mixer);
          break;
      case SOUND_MIXER_ALTPCM:  /* SB PCM (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x07, mixer);
          break;
      case SOUND_MIXER_SPEAKER: /* PC speaker (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x06, mixer);
          break;
      case SOUND_MIXER_LINE:    /* External line (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x02, mixer);
          break;
      case SOUND_MIXER_CD:  /* CD (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x03, mixer);
          break;
      case SOUND_MIXER_MIC: /* External microphone (0-31) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x04, mixer);
          break;
      case SOUND_MIXER_IMIX:    /* Recording monitor (0-31) (Output mixer only) */
          levels[whichDev] = mixer_output(right, left, 31, 0x10 | 0x01,
                          0x00);
          break;
      case SOUND_MIXER_RECLEV:  /* Recording level (0-15) */
          levels[whichDev] = mixer_output(right, left, 15, 0x02, 0);
          break;


      case SOUND_MIXER_RECSRC:
          devmask = level & POSSIBLE_RECORDING_DEVICES;

          changed = devmask ^ rec_devices;
          rec_devices = devmask;

          for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
              if (changed & (1 << i))
                {
                    pas_mixer_set(i, levels[i]);
                }
          return rec_devices;
          break;

      default:
          return -EINVAL;
      }

    return (levels[whichDev]);
}

/*****/

static void
pas_mixer_reset(void)
{
    int             foo;

    DEB(printk("pas2_mixer.c: void pas_mixer_reset(void)\n"));

    for (foo = 0; foo < SOUND_MIXER_NRDEVICES; foo++)
        pas_mixer_set(foo, levels[foo]);

    set_mode(0x04 | 0x01);
}

static int pas_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
{
    int level,v ;
    int __user *p = (int __user *)arg;

    DEB(printk("pas2_mixer.c: int pas_mixer_ioctl(unsigned int cmd = %X, unsigned int arg = %X)\n", cmd, arg));
    if (cmd == SOUND_MIXER_PRIVATE1) { /* Set loudness bit */
        if (get_user(level, p))
            return -EFAULT;
        if (level == -1)  /* Return current settings */
            level = (mode_control & 0x04);
        else {
            mode_control &= ~0x04;
            if (level)
                mode_control |= 0x04;
            set_mode(mode_control);
        }
        level = !!level;
        return put_user(level, p);
    }
    if (cmd == SOUND_MIXER_PRIVATE2) { /* Set enhance bit */
        if (get_user(level, p))
            return -EFAULT;
        if (level == -1) { /* Return current settings */
            if (!(mode_control & 0x03))
                level = 0;
            else
                level = ((mode_control & 0x03) + 1) * 20;
        } else {
            int i = 0;
            
            level &= 0x7f;
            if (level)
                i = (level / 20) - 1;
            mode_control &= ~0x03;
            mode_control |= i & 0x03;
            set_mode(mode_control);
            if (i)
                i = (i + 1) * 20;
            level = i;
        }
        return put_user(level, p);
    }
    if (cmd == SOUND_MIXER_PRIVATE3) { /* Set mute bit */
        if (get_user(level, p))
            return -EFAULT;
        if (level == -1)    /* Return current settings */
            level = !(pas_read(0x0B8A) & 0x20);
        else {
            if (level)
                pas_write(pas_read(0x0B8A) & (~0x20), 0x0B8A);
            else
                pas_write(pas_read(0x0B8A) | 0x20, 0x0B8A);

            level = !(pas_read(0x0B8A) & 0x20);
        }
        return put_user(level, p);
    }
    if (((cmd >> 8) & 0xff) == 'M') {
        if (get_user(v, p))
            return -EFAULT;
        if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
            v = pas_mixer_set(cmd & 0xff, v);
        } else {
            switch (cmd & 0xff) {
            case SOUND_MIXER_RECSRC:
                v = rec_devices;
                break;
                
            case SOUND_MIXER_STEREODEVS:
                v = SUPPORTED_MIXER_DEVICES & ~(SOUND_MASK_BASS | SOUND_MASK_TREBLE);
                break;
                
            case SOUND_MIXER_DEVMASK:
                v = SUPPORTED_MIXER_DEVICES;
                break;
                
            case SOUND_MIXER_RECMASK:
                v = POSSIBLE_RECORDING_DEVICES & SUPPORTED_MIXER_DEVICES;
                break;
                
            case SOUND_MIXER_CAPS:
                v = 0;  /* No special capabilities */
                break;
                
            default:
                v = levels[cmd & 0xff];
                break;
            }
        }
        return put_user(v, p);
    }
    return -EINVAL;
}

static struct mixer_operations pas_mixer_operations =
{
    .owner  = THIS_MODULE,
    .id = "PAS16",
    .name   = "Pro Audio Spectrum 16",
    .ioctl  = pas_mixer_ioctl
};

int __init
pas_init_mixer(void)
{
    int             d;

    levels = load_mixer_volumes("PAS16_1", default_levels, 1);

    pas_mixer_reset();

    if ((d = sound_alloc_mixerdev()) != -1)
      {
          audio_devs[pas_audiodev]->mixer_dev = d;
          mixer_devs[d] = &pas_mixer_operations;
      }
    return 1;
}