HelenOS sources

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This source file includes following definitions.
sb_mixer_type_str
sb_mixer_init
sb_mixer_get_control_item_count
sb_mixer_get_control_item_info
sb_mixer_get_control_item_value
sb_mixer_set_control_item_value
/*
 * Copyright (c) 2011 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <assert.h>
#include <stdbool.h>
#include <errno.h>
#include <libarch/ddi.h>
#include <macros.h>

#include "ddf_log.h"
#include "mixer.h"

typedef struct channel {
        const char *name;
        uint8_t address;
        unsigned shift;
        unsigned volume_levels;
        bool preserve_bits;
} channel_t;

/* CT1335 channels */
static const channel_t channels_table_ct1335[] = {
        { "Master", 0x02, 1, 8, false }, /* Master, Mono, 3bit volume level */
        { "Midi", 0x06, 1, 8, false }, /* Midi, Mono, 3bit volume level */
        { "CD", 0x08, 1, 8, false }, /* CD, Mono, 3bit volume level */
        { "Voice", 0x0a, 1, 4, false }, /* Voice, Mono, 2bit volume level */
};

/* CT1345 channels */
static const channel_t channels_table_ct1345[] = {
        { "Master Left", 0x22, 5, 8, true }, /* Master, Left, 3bit volume level */
        { "Master Right", 0x22, 1, 8, true }, /* Master, Right, 3bit volume level */
        { "MIDI Left", 0x26, 5, 8, true }, /* Midi, Left, 3bit volume level */
        { "MIDI Right", 0x26, 1, 8, true }, /* Midi, Right, 3bit volume level */
        { "CD Left", 0x28, 5, 8, true }, /* CD, Left, 3bit volume level */
        { "CD Right", 0x28, 1, 8, true }, /* CD, Right, 3bit volume level */
        { "Line In Left", 0x2e, 5, 8, true }, /* Line, Left, 3bit volume level */
        { "Line In Right", 0x2e, 1, 8, true }, /* Line, Right, 3bit volume level */
        { "Voice Left", 0x04, 5, 8, true }, /* Voice, Left, 3bit volume level */
        { "Voice Right", 0x04, 1, 8, true }, /* Voice, Right, 3bit volume level */
        { "Mic", 0x0a, 1, 4, false }, /* Mic, Mono, 2bit volume level */
};

/* CT1745 channels */
static const channel_t channels_table_ct1745[] = {
        { "Master Left", 0x30, 3, 32, false },  /* Master, Left, 5bit volume level */
        { "Master Right", 0x31, 3, 32, false }, /* Master, Right, 5bit volume level */
        { "Voice Left", 0x32, 3, 32, false },  /* Voice, Left, 5bit volume level */
        { "Voice Right", 0x33, 3, 32, false }, /* Voice, Right, 5bit volume level */
        { "MIDI Left", 0x34, 3, 32, false }, /* MIDI, Left, 5bit volume level */
        { "MIDI Right", 0x35, 3, 32, false }, /* MIDI, Right, 5bit volume level */
        { "CD Left", 0x36, 3, 32, false }, /* CD, Left, 5bit volume level */
        { "CD Right", 0x37, 3, 32, false }, /* CD, Right, 5bit volume level */
        { "Line In Left", 0x38, 3, 32, false }, /* Line, Left, 5bit volume level */
        { "Line In Right", 0x39, 3, 32, false }, /* Line, Right, 5bit volume level */
        { "Mic", 0x3a, 3, 32, false }, /* Mic, Mono, 5bit volume level */
        { "PC Speaker", 0x3b, 6, 4, false }, /* PC speaker, Mono, 2bit level */
        { "Input Gain Left", 0x3f, 6, 4, false }, /* Input Gain, Left, 2bit level */
        { "Input Gain Right", 0x40, 6, 4, false }, /* Input Gain, Right, 2bit level */
        { "Output Gain Left", 0x41, 6, 4, false }, /* Output Gain, Left, 2bit level */
        { "Output Gain Right", 0x42, 6, 4, false }, /* Output Gain, Right, 2bit level */
        { "Treble Left", 0x44, 4, 16, false }, /* Treble, Left, 4bit volume level */
        { "Treble Right", 0x45, 4, 16, false }, /* Treble, Right, 4bit volume level */
        { "Bass Left", 0x46, 4, 16, false }, /* Bass, Left, 4bit volume level */
        { "Bass Right", 0x47, 4, 16, false }, /* Bass, Right, 4bit volume level */
};

static const struct {
        const channel_t *table;
        size_t count;
} volume_table[] = {
        [SB_MIXER_NONE] = { NULL, 0 },
        [SB_MIXER_UNKNOWN] = { NULL, 0 },
        [SB_MIXER_CT1335] = {
                channels_table_ct1335,
                ARRAY_SIZE(channels_table_ct1335),
        },
        [SB_MIXER_CT1345] = {
                channels_table_ct1345,
                ARRAY_SIZE(channels_table_ct1345),
        },
        [SB_MIXER_CT1745] = {
                channels_table_ct1745,
                ARRAY_SIZE(channels_table_ct1745),
        },
};

const char *sb_mixer_type_str(sb_mixer_type_t type)
{
        static const char *names[] = {
                [SB_MIXER_NONE] = "No mixer",
                [SB_MIXER_CT1335] = "CT 1335",
                [SB_MIXER_CT1345] = "CT 1345",
                [SB_MIXER_CT1745] = "CT 1745",
                [SB_MIXER_UNKNOWN] = "Unknown mixer",
        };
        return names[type];
}

errno_t sb_mixer_init(sb_mixer_t *mixer, sb16_regs_t *regs, sb_mixer_type_t type)
{
        assert(mixer);
        mixer->regs = regs;
        mixer->type = type;
        if (type == SB_MIXER_UNKNOWN)
                return ENOTSUP;

        if (type != SB_MIXER_NONE) {
                pio_write_8(&regs->mixer_address, MIXER_RESET_ADDRESS);
                pio_write_8(&regs->mixer_data, 1);
        }
        pio_write_8(&regs->mixer_address, MIXER_PNP_IRQ_ADDRESS);
        const uint8_t irq = pio_read_8(&regs->mixer_data);
        pio_write_8(&regs->mixer_address, MIXER_PNP_DMA_ADDRESS);
        const uint8_t dma = pio_read_8(&regs->mixer_data);
        ddf_log_debug("SB16 setup with IRQ 0x%hhx and DMA 0x%hhx.", irq, dma);
        return EOK;
}

int sb_mixer_get_control_item_count(const sb_mixer_t *mixer)
{
        assert(mixer);
        return volume_table[mixer->type].count;
}

errno_t sb_mixer_get_control_item_info(const sb_mixer_t *mixer, unsigned item,
    const char **name, unsigned *levels)
{
        assert(mixer);
        if (item > volume_table[mixer->type].count)
                return ENOENT;

        const channel_t *ch = &volume_table[mixer->type].table[item];
        if (name)
                *name = ch->name;
        if (levels)
                *levels = ch->volume_levels;
        return EOK;
}

/**
 * Write new volume level from mixer registers.
 * @param mixer SB Mixer to use.
 * @param index Control item(channel) index.
 * @param value New volume level.
 * @return Error code.
 */
errno_t sb_mixer_get_control_item_value(const sb_mixer_t *mixer, unsigned item,
    unsigned *value)
{
        assert(mixer);
        if (!value)
                return EBADMEM;
        if (item > volume_table[mixer->type].count)
                return ENOENT;

        const channel_t *chan = &volume_table[mixer->type].table[item];
        pio_write_8(&mixer->regs->mixer_address, chan->address);
        *value = (pio_read_8(&mixer->regs->mixer_data) >> chan->shift) &
            (chan->volume_levels - 1);
        return EOK;
}

/**
 * Write new volume level to mixer registers.
 * @param mixer SB Mixer to use.
 * @param index Control item(channel) index.
 * @param value New volume level.
 * @return Error code.
 */
errno_t sb_mixer_set_control_item_value(const sb_mixer_t *mixer, unsigned item,
    unsigned value)
{
        assert(mixer);
        if (item > volume_table[mixer->type].count)
                return ENOENT;

        const channel_t *chan = &volume_table[mixer->type].table[item];
        if (value >= chan->volume_levels)
                value = chan->volume_levels - 1;

        pio_write_8(&mixer->regs->mixer_address, chan->address);

        uint8_t regv = 0;
        if (chan->preserve_bits) {
                regv = pio_read_8(&mixer->regs->mixer_data);
                regv &= ~(uint8_t)((chan->volume_levels - 1) << chan->shift);
        }

        regv |= value << chan->shift;
        pio_write_8(&mixer->regs->mixer_data, regv);
        ddf_log_note("Item %s new value is: %u.",
            volume_table[mixer->type].table[item].name, value);
        return EOK;
}
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root/uspace/drv/audio/sb16/mixer.c

DEFINITIONS
