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root/sound/oss/sb_mixer.c

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DEFINITIONS

This source file includes following definitions.
  1. sb_mixer_set_stereo
  2. detect_mixer
  3. change_bits
  4. sb_mixer_get
  5. smw_mixer_init
  6. sb_common_mixer_set
  7. smw_mixer_set
  8. sb_mixer_set
  9. set_recsrc
  10. set_recmask
  11. set_outmask
  12. sb_mixer_ioctl
  13. sb_mixer_reset
  14. sb_mixer_init
  15. sb_mixer_unload

/*
 * sound/oss/sb_mixer.c
 *
 * The low level mixer driver for the Sound Blaster compatible 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)
 * Rolf Fokkens (Dec 20 1998)   : Moved ESS stuff into sb_ess.[ch]
 * Stanislav Voronyi <stas@esc.kharkov.com>     : Support for AWE 3DSE device (Jun 7 1999)
 */

#include "sound_config.h"

#define __SB_MIXER_C__

#include "sb.h"
#include "sb_mixer.h"

#include "sb_ess.h"

#define SBPRO_RECORDING_DEVICES (SOUND_MASK_LINE | SOUND_MASK_MIC | SOUND_MASK_CD)

/* Same as SB Pro, unless I find otherwise */
#define SGNXPRO_RECORDING_DEVICES SBPRO_RECORDING_DEVICES

#define SBPRO_MIXER_DEVICES             (SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_LINE | SOUND_MASK_MIC | \
                                         SOUND_MASK_CD | SOUND_MASK_VOLUME)

/* SG NX Pro has treble and bass settings on the mixer. The 'speaker'
 * channel is the COVOX/DisneySoundSource emulation volume control
 * on the mixer. It does NOT control speaker volume. Should have own
 * mask eventually?
 */
#define SGNXPRO_MIXER_DEVICES   (SBPRO_MIXER_DEVICES|SOUND_MASK_BASS| \
                                 SOUND_MASK_TREBLE|SOUND_MASK_SPEAKER )

#define SB16_RECORDING_DEVICES          (SOUND_MASK_SYNTH | SOUND_MASK_LINE | SOUND_MASK_MIC | \
                                         SOUND_MASK_CD)

#define SB16_OUTFILTER_DEVICES          (SOUND_MASK_LINE | SOUND_MASK_MIC | \
                                         SOUND_MASK_CD)

#define SB16_MIXER_DEVICES              (SOUND_MASK_SYNTH | SOUND_MASK_PCM | SOUND_MASK_SPEAKER | SOUND_MASK_LINE | SOUND_MASK_MIC | \
                                         SOUND_MASK_CD | \
                                         SOUND_MASK_IGAIN | SOUND_MASK_OGAIN | \
                                         SOUND_MASK_VOLUME | SOUND_MASK_BASS | SOUND_MASK_TREBLE | \
                                        SOUND_MASK_IMIX)

/* These are the only devices that are working at the moment.  Others could
 * be added once they are identified and a method is found to control them.
 */
#define ALS007_MIXER_DEVICES    (SOUND_MASK_SYNTH | SOUND_MASK_LINE | \
                                 SOUND_MASK_PCM | SOUND_MASK_MIC | \
                                 SOUND_MASK_CD | \
                                 SOUND_MASK_VOLUME)

static mixer_tab sbpro_mix = {
MIX_ENT(SOUND_MIXER_VOLUME,     0x22, 7, 4, 0x22, 3, 4),
MIX_ENT(SOUND_MIXER_BASS,       0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_TREBLE,     0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_SYNTH,      0x26, 7, 4, 0x26, 3, 4),
MIX_ENT(SOUND_MIXER_PCM,        0x04, 7, 4, 0x04, 3, 4),
MIX_ENT(SOUND_MIXER_SPEAKER,    0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_LINE,       0x2e, 7, 4, 0x2e, 3, 4),
MIX_ENT(SOUND_MIXER_MIC,        0x0a, 2, 3, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_CD,         0x28, 7, 4, 0x28, 3, 4),
MIX_ENT(SOUND_MIXER_IMIX,       0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_ALTPCM,     0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_RECLEV,     0x00, 0, 0, 0x00, 0, 0)
};

static mixer_tab sb16_mix = {
MIX_ENT(SOUND_MIXER_VOLUME,     0x30, 7, 5, 0x31, 7, 5),
MIX_ENT(SOUND_MIXER_BASS,       0x46, 7, 4, 0x47, 7, 4),
MIX_ENT(SOUND_MIXER_TREBLE,     0x44, 7, 4, 0x45, 7, 4),
MIX_ENT(SOUND_MIXER_SYNTH,      0x34, 7, 5, 0x35, 7, 5),
MIX_ENT(SOUND_MIXER_PCM,        0x32, 7, 5, 0x33, 7, 5),
MIX_ENT(SOUND_MIXER_SPEAKER,    0x3b, 7, 2, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_LINE,       0x38, 7, 5, 0x39, 7, 5),
MIX_ENT(SOUND_MIXER_MIC,        0x3a, 7, 5, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_CD,         0x36, 7, 5, 0x37, 7, 5),
MIX_ENT(SOUND_MIXER_IMIX,       0x3c, 0, 1, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_ALTPCM,     0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_RECLEV,     0x3f, 7, 2, 0x40, 7, 2), /* Obsolete. Use IGAIN */
MIX_ENT(SOUND_MIXER_IGAIN,      0x3f, 7, 2, 0x40, 7, 2),
MIX_ENT(SOUND_MIXER_OGAIN,      0x41, 7, 2, 0x42, 7, 2)
};

static mixer_tab als007_mix = 
{
MIX_ENT(SOUND_MIXER_VOLUME,     0x62, 7, 4, 0x62, 3, 4),
MIX_ENT(SOUND_MIXER_BASS,       0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_TREBLE,     0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_SYNTH,      0x66, 7, 4, 0x66, 3, 4),
MIX_ENT(SOUND_MIXER_PCM,        0x64, 7, 4, 0x64, 3, 4),
MIX_ENT(SOUND_MIXER_SPEAKER,    0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_LINE,       0x6e, 7, 4, 0x6e, 3, 4),
MIX_ENT(SOUND_MIXER_MIC,        0x6a, 2, 3, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_CD,         0x68, 7, 4, 0x68, 3, 4),
MIX_ENT(SOUND_MIXER_IMIX,       0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_ALTPCM,     0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_RECLEV,     0x00, 0, 0, 0x00, 0, 0), /* Obsolete. Use IGAIN */
MIX_ENT(SOUND_MIXER_IGAIN,      0x00, 0, 0, 0x00, 0, 0),
MIX_ENT(SOUND_MIXER_OGAIN,      0x00, 0, 0, 0x00, 0, 0)
};


/* SM_GAMES          Master volume is lower and PCM & FM volumes
                             higher than with SB Pro. This improves the
                             sound quality */

static int smg_default_levels[32] =
{
  0x2020,                       /* Master Volume */
  0x4b4b,                       /* Bass */
  0x4b4b,                       /* Treble */
  0x6464,                       /* FM */
  0x6464,                       /* PCM */
  0x4b4b,                       /* PC Speaker */
  0x4b4b,                       /* Ext Line */
  0x0000,                       /* Mic */
  0x4b4b,                       /* CD */
  0x4b4b,                       /* Recording monitor */
  0x4b4b,                       /* SB PCM */
  0x4b4b,                       /* Recording level */
  0x4b4b,                       /* Input gain */
  0x4b4b,                       /* Output gain */
  0x4040,                       /* Line1 */
  0x4040,                       /* Line2 */
  0x1515                        /* Line3 */
};

static int sb_default_levels[32] =
{
  0x5a5a,                       /* Master Volume */
  0x4b4b,                       /* Bass */
  0x4b4b,                       /* Treble */
  0x4b4b,                       /* FM */
  0x4b4b,                       /* PCM */
  0x4b4b,                       /* PC Speaker */
  0x4b4b,                       /* Ext Line */
  0x1010,                       /* Mic */
  0x4b4b,                       /* CD */
  0x0000,                       /* Recording monitor */
  0x4b4b,                       /* SB PCM */
  0x4b4b,                       /* Recording level */
  0x4b4b,                       /* Input gain */
  0x4b4b,                       /* Output gain */
  0x4040,                       /* Line1 */
  0x4040,                       /* Line2 */
  0x1515                        /* Line3 */
};

static unsigned char sb16_recmasks_L[SOUND_MIXER_NRDEVICES] =
{
        0x00,   /* SOUND_MIXER_VOLUME   */
        0x00,   /* SOUND_MIXER_BASS     */
        0x00,   /* SOUND_MIXER_TREBLE   */
        0x40,   /* SOUND_MIXER_SYNTH    */
        0x00,   /* SOUND_MIXER_PCM      */
        0x00,   /* SOUND_MIXER_SPEAKER  */
        0x10,   /* SOUND_MIXER_LINE     */
        0x01,   /* SOUND_MIXER_MIC      */
        0x04,   /* SOUND_MIXER_CD       */
        0x00,   /* SOUND_MIXER_IMIX     */
        0x00,   /* SOUND_MIXER_ALTPCM   */
        0x00,   /* SOUND_MIXER_RECLEV   */
        0x00,   /* SOUND_MIXER_IGAIN    */
        0x00    /* SOUND_MIXER_OGAIN    */
};

static unsigned char sb16_recmasks_R[SOUND_MIXER_NRDEVICES] =
{
        0x00,   /* SOUND_MIXER_VOLUME   */
        0x00,   /* SOUND_MIXER_BASS     */
        0x00,   /* SOUND_MIXER_TREBLE   */
        0x20,   /* SOUND_MIXER_SYNTH    */
        0x00,   /* SOUND_MIXER_PCM      */
        0x00,   /* SOUND_MIXER_SPEAKER  */
        0x08,   /* SOUND_MIXER_LINE     */
        0x01,   /* SOUND_MIXER_MIC      */
        0x02,   /* SOUND_MIXER_CD       */
        0x00,   /* SOUND_MIXER_IMIX     */
        0x00,   /* SOUND_MIXER_ALTPCM   */
        0x00,   /* SOUND_MIXER_RECLEV   */
        0x00,   /* SOUND_MIXER_IGAIN    */
        0x00    /* SOUND_MIXER_OGAIN    */
};

static char     smw_mix_regs[] =        /* Left mixer registers */
{
  0x0b,                         /* SOUND_MIXER_VOLUME */
  0x0d,                         /* SOUND_MIXER_BASS */
  0x0d,                         /* SOUND_MIXER_TREBLE */
  0x05,                         /* SOUND_MIXER_SYNTH */
  0x09,                         /* SOUND_MIXER_PCM */
  0x00,                         /* SOUND_MIXER_SPEAKER */
  0x03,                         /* SOUND_MIXER_LINE */
  0x01,                         /* SOUND_MIXER_MIC */
  0x07,                         /* SOUND_MIXER_CD */
  0x00,                         /* SOUND_MIXER_IMIX */
  0x00,                         /* SOUND_MIXER_ALTPCM */
  0x00,                         /* SOUND_MIXER_RECLEV */
  0x00,                         /* SOUND_MIXER_IGAIN */
  0x00,                         /* SOUND_MIXER_OGAIN */
  0x00,                         /* SOUND_MIXER_LINE1 */
  0x00,                         /* SOUND_MIXER_LINE2 */
  0x00                          /* SOUND_MIXER_LINE3 */
};

static int      sbmixnum = 1;

static void     sb_mixer_reset(sb_devc * devc);

void sb_mixer_set_stereo(sb_devc * devc, int mode)
{
        sb_chgmixer(devc, OUT_FILTER, STEREO_DAC, (mode ? STEREO_DAC : MONO_DAC));
}

static int detect_mixer(sb_devc * devc)
{
        /* Just trust the mixer is there */
        return 1;
}

static void change_bits(sb_devc * devc, unsigned char *regval, int dev, int chn, int newval)
{
        unsigned char mask;
        int shift;

        mask = (1 << (*devc->iomap)[dev][chn].nbits) - 1;
        newval = (int) ((newval * mask) + 50) / 100;    /* Scale */

        shift = (*devc->iomap)[dev][chn].bitoffs - (*devc->iomap)[dev][LEFT_CHN].nbits + 1;

        *regval &= ~(mask << shift);    /* Mask out previous value */
        *regval |= (newval & mask) << shift;    /* Set the new value */
}

static int sb_mixer_get(sb_devc * devc, int dev)
{
        if (!((1 << dev) & devc->supported_devices))
                return -EINVAL;
        return devc->levels[dev];
}

void smw_mixer_init(sb_devc * devc)
{
        int i;

        sb_setmixer(devc, 0x00, 0x18);  /* Mute unused (Telephone) line */
        sb_setmixer(devc, 0x10, 0x38);  /* Config register 2 */

        devc->supported_devices = 0;
        for (i = 0; i < sizeof(smw_mix_regs); i++)
                if (smw_mix_regs[i] != 0)
                        devc->supported_devices |= (1 << i);

        devc->supported_rec_devices = devc->supported_devices &
                ~(SOUND_MASK_BASS | SOUND_MASK_TREBLE | SOUND_MASK_PCM | SOUND_MASK_VOLUME);
        sb_mixer_reset(devc);
}

int sb_common_mixer_set(sb_devc * devc, int dev, int left, int right)
{
        int regoffs;
        unsigned char val;

        if ((dev < 0) || (dev >= devc->iomap_sz))
                return -EINVAL;

        regoffs = (*devc->iomap)[dev][LEFT_CHN].regno;

        if (regoffs == 0)
                return -EINVAL;

        val = sb_getmixer(devc, regoffs);
        change_bits(devc, &val, dev, LEFT_CHN, left);

        if ((*devc->iomap)[dev][RIGHT_CHN].regno != regoffs)    /*
                                                                 * Change register
                                                                 */
        {
                sb_setmixer(devc, regoffs, val);        /*
                                                         * Save the old one
                                                         */
                regoffs = (*devc->iomap)[dev][RIGHT_CHN].regno;

                if (regoffs == 0)
                        return left | (left << 8);      /*
                                                         * Just left channel present
                                                         */

                val = sb_getmixer(devc, regoffs);       /*
                                                         * Read the new one
                                                         */
        }
        change_bits(devc, &val, dev, RIGHT_CHN, right);

        sb_setmixer(devc, regoffs, val);

        return left | (right << 8);
}

static int smw_mixer_set(sb_devc * devc, int dev, int left, int right)
{
        int reg, val;

        switch (dev)
        {
                case SOUND_MIXER_VOLUME:
                        sb_setmixer(devc, 0x0b, 96 - (96 * left / 100));        /* 96=mute, 0=max */
                        sb_setmixer(devc, 0x0c, 96 - (96 * right / 100));
                        break;

                case SOUND_MIXER_BASS:
                case SOUND_MIXER_TREBLE:
                        devc->levels[dev] = left | (right << 8);
                        /* Set left bass and treble values */
                        val = ((devc->levels[SOUND_MIXER_TREBLE] & 0xff) * 16 / (unsigned) 100) << 4;
                        val |= ((devc->levels[SOUND_MIXER_BASS] & 0xff) * 16 / (unsigned) 100) & 0x0f;
                        sb_setmixer(devc, 0x0d, val);

                        /* Set right bass and treble values */
                        val = (((devc->levels[SOUND_MIXER_TREBLE] >> 8) & 0xff) * 16 / (unsigned) 100) << 4;
                        val |= (((devc->levels[SOUND_MIXER_BASS] >> 8) & 0xff) * 16 / (unsigned) 100) & 0x0f;
                        sb_setmixer(devc, 0x0e, val);
                
                        break;

                default:
                        /* bounds check */
                        if (dev < 0 || dev >= ARRAY_SIZE(smw_mix_regs))
                                return -EINVAL;
                        reg = smw_mix_regs[dev];
                        if (reg == 0)
                                return -EINVAL;
                        sb_setmixer(devc, reg, (24 - (24 * left / 100)) | 0x20);        /* 24=mute, 0=max */
                        sb_setmixer(devc, reg + 1, (24 - (24 * right / 100)) | 0x40);
        }

        devc->levels[dev] = left | (right << 8);
        return left | (right << 8);
}

static int sb_mixer_set(sb_devc * devc, int dev, int value)
{
        int left = value & 0x000000ff;
        int right = (value & 0x0000ff00) >> 8;
        int retval;

        if (left > 100)
                left = 100;
        if (right > 100)
                right = 100;

        if ((dev < 0) || (dev > 31))
                return -EINVAL;

        if (!(devc->supported_devices & (1 << dev)))    /*
                                                         * Not supported
                                                         */
                return -EINVAL;

        /* Differentiate depending on the chipsets */
        switch (devc->model) {
        case MDL_SMW:
                retval = smw_mixer_set(devc, dev, left, right);
                break;
        case MDL_ESS:
                retval = ess_mixer_set(devc, dev, left, right);
                break;
        default:
                retval = sb_common_mixer_set(devc, dev, left, right);
        }
        if (retval >= 0) devc->levels[dev] = retval;

        return retval;
}

/*
 * set_recsrc doesn't apply to ES188x
 */
static void set_recsrc(sb_devc * devc, int src)
{
        sb_setmixer(devc, RECORD_SRC, (sb_getmixer(devc, RECORD_SRC) & ~7) | (src & 0x7));
}

static int set_recmask(sb_devc * devc, int mask)
{
        int devmask, i;
        unsigned char  regimageL, regimageR;

        devmask = mask & devc->supported_rec_devices;

        switch (devc->model)
        {
                case MDL_SBPRO:
                case MDL_ESS:
                case MDL_JAZZ:
                case MDL_SMW:
                        if (devc->model == MDL_ESS && ess_set_recmask (devc, &devmask)) {
                                break;
                        };
                        if (devmask != SOUND_MASK_MIC &&
                                devmask != SOUND_MASK_LINE &&
                                devmask != SOUND_MASK_CD)
                        {
                                /*
                                 * More than one device selected. Drop the
                                 * previous selection
                                 */
                                devmask &= ~devc->recmask;
                        }
                        if (devmask != SOUND_MASK_MIC &&
                                devmask != SOUND_MASK_LINE &&
                                devmask != SOUND_MASK_CD)
                        {
                                /*
                                 * More than one device selected. Default to
                                 * mic
                                 */
                                devmask = SOUND_MASK_MIC;
                        }
                        if (devmask ^ devc->recmask)    /*
                                                         *      Input source changed
                                                         */
                        {
                                switch (devmask)
                                {
                                        case SOUND_MASK_MIC:
                                                set_recsrc(devc, SRC__MIC);
                                                break;

                                        case SOUND_MASK_LINE:
                                                set_recsrc(devc, SRC__LINE);
                                                break;

                                        case SOUND_MASK_CD:
                                                set_recsrc(devc, SRC__CD);
                                                break;

                                        default:
                                                set_recsrc(devc, SRC__MIC);
                                }
                        }
                        break;

                case MDL_SB16:
                        if (!devmask)
                                devmask = SOUND_MASK_MIC;

                        if (devc->submodel == SUBMDL_ALS007) 
                        {
                                switch (devmask) 
                                {
                                        case SOUND_MASK_LINE:
                                                sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_LINE);
                                                break;
                                        case SOUND_MASK_CD:
                                                sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_CD);
                                                break;
                                        case SOUND_MASK_SYNTH:
                                                sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_SYNTH);
                                                break;
                                        default:           /* Also takes care of SOUND_MASK_MIC case */
                                                sb_setmixer(devc, ALS007_RECORD_SRC, ALS007_MIC);
                                                break;
                                }
                        }
                        else
                        {
                                regimageL = regimageR = 0;
                                for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                {
                                        if ((1 << i) & devmask)
                                        {
                                                regimageL |= sb16_recmasks_L[i];
                                                regimageR |= sb16_recmasks_R[i];
                                        }
                                        sb_setmixer (devc, SB16_IMASK_L, regimageL);
                                        sb_setmixer (devc, SB16_IMASK_R, regimageR);
                                }
                        }
                        break;
        }
        devc->recmask = devmask;
        return devc->recmask;
}

static int set_outmask(sb_devc * devc, int mask)
{
        int devmask, i;
        unsigned char  regimage;

        devmask = mask & devc->supported_out_devices;

        switch (devc->model)
        {
                case MDL_SB16:
                        if (devc->submodel == SUBMDL_ALS007) 
                                break;
                        else
                        {
                                regimage = 0;
                                for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                {
                                        if ((1 << i) & devmask)
                                        {
                                                regimage |= (sb16_recmasks_L[i] | sb16_recmasks_R[i]);
                                        }
                                        sb_setmixer (devc, SB16_OMASK, regimage);
                                }
                        }
                        break;
                default:
                        break;
        }

        devc->outmask = devmask;
        return devc->outmask;
}

static int sb_mixer_ioctl(int dev, unsigned int cmd, void __user *arg)
{
        sb_devc *devc = mixer_devs[dev]->devc;
        int val, ret;
        int __user *p = arg;

        /*
         * Use ioctl(fd, SOUND_MIXER_AGC, &mode) to turn AGC off (0) or on (1).
         * Use ioctl(fd, SOUND_MIXER_3DSE, &mode) to turn 3DSE off (0) or on (1)
         *                                            or mode==2 put 3DSE state to mode.
         */
        if (devc->model == MDL_SB16) {
                if (cmd == SOUND_MIXER_AGC) 
                {
                        if (get_user(val, p))
                                return -EFAULT;
                        sb_setmixer(devc, 0x43, (~val) & 0x01);
                        return 0;
                }
                if (cmd == SOUND_MIXER_3DSE) 
                {
                        /* I put here 15, but I don't know the exact version.
                           At least my 4.13 havn't 3DSE, 4.16 has it. */
                        if (devc->minor < 15)
                                return -EINVAL;
                        if (get_user(val, p))
                                return -EFAULT;
                        if (val == 0 || val == 1)
                                sb_chgmixer(devc, AWE_3DSE, 0x01, val);
                        else if (val == 2)
                        {
                                ret = sb_getmixer(devc, AWE_3DSE)&0x01;
                                return put_user(ret, p);
                        }
                        else
                                return -EINVAL;
                        return 0;
                }
        }
        if (((cmd >> 8) & 0xff) == 'M') 
        {
                if (_SIOC_DIR(cmd) & _SIOC_WRITE) 
                {
                        if (get_user(val, p))
                                return -EFAULT;
                        switch (cmd & 0xff) 
                        {
                                case SOUND_MIXER_RECSRC:
                                        ret = set_recmask(devc, val);
                                        break;

                                case SOUND_MIXER_OUTSRC:
                                        ret = set_outmask(devc, val);
                                        break;

                                default:
                                        ret = sb_mixer_set(devc, cmd & 0xff, val);
                        }
                }
                else switch (cmd & 0xff) 
                {
                        case SOUND_MIXER_RECSRC:
                                ret = devc->recmask;
                                break;
                                  
                        case SOUND_MIXER_OUTSRC:
                                ret = devc->outmask;
                                break;
                                  
                        case SOUND_MIXER_DEVMASK:
                                ret = devc->supported_devices;
                                break;
                                  
                        case SOUND_MIXER_STEREODEVS:
                                ret = devc->supported_devices;
                                /* The ESS seems to have stereo mic controls */
                                if (devc->model == MDL_ESS)
                                        ret &= ~(SOUND_MASK_SPEAKER|SOUND_MASK_IMIX);
                                else if (devc->model != MDL_JAZZ && devc->model != MDL_SMW)
                                        ret &= ~(SOUND_MASK_MIC | SOUND_MASK_SPEAKER | SOUND_MASK_IMIX);
                                break;
                                  
                        case SOUND_MIXER_RECMASK:
                                ret = devc->supported_rec_devices;
                                break;
                                  
                        case SOUND_MIXER_OUTMASK:
                                ret = devc->supported_out_devices;
                                break;
                                  
                        case SOUND_MIXER_CAPS:
                                ret = devc->mixer_caps;
                                break;
                                    
                        default:
                                ret = sb_mixer_get(devc, cmd & 0xff);
                                break;
                }
                return put_user(ret, p); 
        } else
                return -EINVAL;
}

static struct mixer_operations sb_mixer_operations =
{
        .owner  = THIS_MODULE,
        .id     = "SB",
        .name   = "Sound Blaster",
        .ioctl  = sb_mixer_ioctl
};

static struct mixer_operations als007_mixer_operations =
{
        .owner  = THIS_MODULE,
        .id     = "ALS007",
        .name   = "Avance ALS-007",
        .ioctl  = sb_mixer_ioctl
};

static void sb_mixer_reset(sb_devc * devc)
{
        char name[32];
        int i;

        sprintf(name, "SB_%d", devc->sbmixnum);

        if (devc->sbmo.sm_games)
                devc->levels = load_mixer_volumes(name, smg_default_levels, 1);
        else
                devc->levels = load_mixer_volumes(name, sb_default_levels, 1);

        for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                sb_mixer_set(devc, i, devc->levels[i]);

        if (devc->model != MDL_ESS || !ess_mixer_reset (devc)) {
                set_recmask(devc, SOUND_MASK_MIC);
        };
}

int sb_mixer_init(sb_devc * devc, struct module *owner)
{
        int mixer_type = 0;
        int m;

        devc->sbmixnum = sbmixnum++;
        devc->levels = NULL;

        sb_setmixer(devc, 0x00, 0);     /* Reset mixer */

        if (!(mixer_type = detect_mixer(devc)))
                return 0;       /* No mixer. Why? */

        switch (devc->model)
        {
                case MDL_ESSPCI:
                case MDL_YMPCI:
                case MDL_SBPRO:
                case MDL_AZTECH:
                case MDL_JAZZ:
                        devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
                        devc->supported_devices = SBPRO_MIXER_DEVICES;
                        devc->supported_rec_devices = SBPRO_RECORDING_DEVICES;
                        devc->iomap = &sbpro_mix;
                        devc->iomap_sz = ARRAY_SIZE(sbpro_mix);
                        break;

                case MDL_ESS:
                        ess_mixer_init (devc);
                        break;

                case MDL_SMW:
                        devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
                        devc->supported_devices = 0;
                        devc->supported_rec_devices = 0;
                        devc->iomap = &sbpro_mix;
                        devc->iomap_sz = ARRAY_SIZE(sbpro_mix);
                        smw_mixer_init(devc);
                        break;

                case MDL_SB16:
                        devc->mixer_caps = 0;
                        devc->supported_rec_devices = SB16_RECORDING_DEVICES;
                        devc->supported_out_devices = SB16_OUTFILTER_DEVICES;
                        if (devc->submodel != SUBMDL_ALS007)
                        {
                                devc->supported_devices = SB16_MIXER_DEVICES;
                                devc->iomap = &sb16_mix;
                                devc->iomap_sz = ARRAY_SIZE(sb16_mix);
                        }
                        else
                        {
                                devc->supported_devices = ALS007_MIXER_DEVICES;
                                devc->iomap = &als007_mix;
                                devc->iomap_sz = ARRAY_SIZE(als007_mix);
                        }
                        break;

                default:
                        printk(KERN_WARNING "sb_mixer: Unsupported mixer type %d\n", devc->model);
                        return 0;
        }

        m = sound_alloc_mixerdev();
        if (m == -1)
                return 0;

        mixer_devs[m] = kmalloc(sizeof(struct mixer_operations), GFP_KERNEL);
        if (mixer_devs[m] == NULL)
        {
                printk(KERN_ERR "sb_mixer: Can't allocate memory\n");
                sound_unload_mixerdev(m);
                return 0;
        }

        if (devc->submodel != SUBMDL_ALS007)
                memcpy ((char *) mixer_devs[m], (char *) &sb_mixer_operations, sizeof (struct mixer_operations));
        else
                memcpy ((char *) mixer_devs[m], (char *) &als007_mixer_operations, sizeof (struct mixer_operations));

        mixer_devs[m]->devc = devc;

        if (owner)
                         mixer_devs[m]->owner = owner;
        
        devc->my_mixerdev = m;
        sb_mixer_reset(devc);
        return 1;
}

void sb_mixer_unload(sb_devc *devc)
{
        if (devc->my_mixerdev == -1)
                return;

        kfree(mixer_devs[devc->my_mixerdev]);
        sound_unload_mixerdev(devc->my_mixerdev);
        sbmixnum--;
}

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