prodigy192.c

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/*
 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
 *
 *   Lowlevel functions for AudioTrak Prodigy 192 cards
 *   Supported IEC958 input from optional MI/ODI/O add-on card.
 *
 *   Specifics (SW, HW):
 *   -------------------
 *      * 49.5MHz crystal
 *      * SPDIF-OUT on the card:
 *        - coax (through isolation transformer)/toslink supplied by
 *          74HC04 gates - 3 in parallel
 *        - output switched between on-board CD drive dig-out connector
 *          and ice1724 SPDTX pin, using 74HC02 NOR gates, controlled
 *          by GPIO20 (0 = CD dig-out, 1 = SPDTX)
 *      * SPDTX goes straight to MI/ODI/O card's SPDIF-OUT coax
 *
 *      * MI/ODI/O card: AK4114 based, used for iec958 input only
 *          - toslink input -> RX0
 *          - coax input -> RX1
 *          - 4wire protocol:
 *              AK4114      ICE1724
 *              ------------------------------
 *          CDTO (pin 32) -- GPIO11 pin 86
 *          CDTI (pin 33) -- GPIO10 pin 77
 *          CCLK (pin 34) -- GPIO9 pin 76
 *          CSN  (pin 35) -- GPIO8 pin 75
 *          - output data Mode 7 (24bit, I2S, slave)
 *      - both MCKO1 and MCKO2 of ak4114 are fed to FPGA, which
 *        outputs master clock to SPMCLKIN of ice1724.
 *        Experimentally I found out that only a combination of
 *        OCKS0=1, OCKS1=1 (128fs, 64fs output) and ice1724 -
 *        VT1724_MT_I2S_MCLK_128X=0 (256fs input) yields correct
 *        sampling rate. That means the the FPGA doubles the
 *        MCK01 rate.
 *
 *  Copyright (c) 2003 Takashi Iwai <[email protected]>
 *      Copyright (c) 2003 Dimitromanolakis Apostolos <[email protected]>
 *      Copyright (c) 2004 Kouichi ONO <[email protected]>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */      

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>

#include "ice1712.h"
#include "envy24ht.h"
#include "prodigy192.h"
#include "stac946x.h"
#include <sound/tlv.h>

struct prodigy192_spec {
    struct ak4114 *ak4114;
    /* rate change needs atomic mute/unmute of all dacs*/
    struct mutex mute_mutex;
};

static inline void stac9460_put(struct snd_ice1712 *ice, int reg, unsigned char val)
{
    snd_vt1724_write_i2c(ice, PRODIGY192_STAC9460_ADDR, reg, val);
}

static inline unsigned char stac9460_get(struct snd_ice1712 *ice, int reg)
{
    return snd_vt1724_read_i2c(ice, PRODIGY192_STAC9460_ADDR, reg);
}

/*
 * DAC mute control
 */

/*
 * idx = STAC9460 volume register number, mute: 0 = mute, 1 = unmute
 */
static int stac9460_dac_mute(struct snd_ice1712 *ice, int idx,
        unsigned char mute)
{
    unsigned char new, old;
    int change;
    old = stac9460_get(ice, idx);
    new = (~mute << 7 & 0x80) | (old & ~0x80);
    change = (new != old);
    if (change)
        /*printk ("Volume register 0x%02x: 0x%02x\n", idx, new);*/
        stac9460_put(ice, idx, new);
    return change;
}

#define stac9460_dac_mute_info      snd_ctl_boolean_mono_info

static int stac9460_dac_mute_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char val;
    int idx;

    if (kcontrol->private_value)
        idx = STAC946X_MASTER_VOLUME;
    else
        idx  = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id) + STAC946X_LF_VOLUME;
    val = stac9460_get(ice, idx);
    ucontrol->value.integer.value[0] = (~val >> 7) & 0x1;
    return 0;
}

static int stac9460_dac_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    struct prodigy192_spec *spec = ice->spec;
    int idx, change;

    if (kcontrol->private_value)
        idx = STAC946X_MASTER_VOLUME;
    else
        idx  = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id) + STAC946X_LF_VOLUME;
    /* due to possible conflicts with stac9460_set_rate_val, mutexing */
    mutex_lock(&spec->mute_mutex);
    /*
    printk(KERN_DEBUG "Mute put: reg 0x%02x, ctrl value: 0x%02x\n", idx,
           ucontrol->value.integer.value[0]);
    */
    change = stac9460_dac_mute(ice, idx, ucontrol->value.integer.value[0]);
    mutex_unlock(&spec->mute_mutex);
    return change;
}

/*
 * DAC volume attenuation mixer control
 */
static int stac9460_dac_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
    uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
    uinfo->count = 1;
    uinfo->value.integer.min = 0;           /* mute */
    uinfo->value.integer.max = 0x7f;        /* 0dB */
    return 0;
}

static int stac9460_dac_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int idx;
    unsigned char vol;

    if (kcontrol->private_value)
        idx = STAC946X_MASTER_VOLUME;
    else
        idx  = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id) + STAC946X_LF_VOLUME;
    vol = stac9460_get(ice, idx) & 0x7f;
    ucontrol->value.integer.value[0] = 0x7f - vol;

    return 0;
}

static int stac9460_dac_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int idx;
    unsigned char tmp, ovol, nvol;
    int change;

    if (kcontrol->private_value)
        idx = STAC946X_MASTER_VOLUME;
    else
        idx  = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id) + STAC946X_LF_VOLUME;
    nvol = ucontrol->value.integer.value[0];
    tmp = stac9460_get(ice, idx);
    ovol = 0x7f - (tmp & 0x7f);
    change = (ovol != nvol);
    if (change) {
        ovol =  (0x7f - nvol) | (tmp & 0x80);
        /*
        printk(KERN_DEBUG "DAC Volume: reg 0x%02x: 0x%02x\n",
               idx, ovol);
        */
        stac9460_put(ice, idx, (0x7f - nvol) | (tmp & 0x80));
    }
    return change;
}

/*
 * ADC mute control
 */
#define stac9460_adc_mute_info      snd_ctl_boolean_stereo_info

static int stac9460_adc_mute_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char val;
    int i;

    for (i = 0; i < 2; ++i) {
        val = stac9460_get(ice, STAC946X_MIC_L_VOLUME + i);
        ucontrol->value.integer.value[i] = ~val>>7 & 0x1;
    }

    return 0;
}

static int stac9460_adc_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char new, old;
    int i, reg;
    int change;

    for (i = 0; i < 2; ++i) {
        reg = STAC946X_MIC_L_VOLUME + i;
        old = stac9460_get(ice, reg);
        new = (~ucontrol->value.integer.value[i]<<7&0x80) | (old&~0x80);
        change = (new != old);
        if (change)
            stac9460_put(ice, reg, new);
    }

    return change;
}

/*
 * ADC gain mixer control
 */
static int stac9460_adc_vol_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
    uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
    uinfo->count = 2;
    uinfo->value.integer.min = 0;       /* 0dB */
    uinfo->value.integer.max = 0x0f;    /* 22.5dB */
    return 0;
}

static int stac9460_adc_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int i, reg;
    unsigned char vol;

    for (i = 0; i < 2; ++i) {
        reg = STAC946X_MIC_L_VOLUME + i;
        vol = stac9460_get(ice, reg) & 0x0f;
        ucontrol->value.integer.value[i] = 0x0f - vol;
    }

    return 0;
}

static int stac9460_adc_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int i, reg;
    unsigned char ovol, nvol;
    int change;

    for (i = 0; i < 2; ++i) {
        reg = STAC946X_MIC_L_VOLUME + i;
        nvol = ucontrol->value.integer.value[i] & 0x0f;
        ovol = 0x0f - stac9460_get(ice, reg);
        change = ((ovol & 0x0f)  != nvol);
        if (change)
            stac9460_put(ice, reg, (0x0f - nvol) | (ovol & ~0x0f));
    }

    return change;
}

static int stac9460_mic_sw_info(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_info *uinfo)
{
    static char *texts[2] = { "Line In", "Mic" };

    uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
    uinfo->count = 1;
    uinfo->value.enumerated.items = 2;

    if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
        uinfo->value.enumerated.item = uinfo->value.enumerated.items - 1;
    strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);

        return 0;
}


static int stac9460_mic_sw_get(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char val;
        
    val = stac9460_get(ice, STAC946X_GENERAL_PURPOSE);
    ucontrol->value.enumerated.item[0] = (val >> 7) & 0x1;
    return 0;
}

static int stac9460_mic_sw_put(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char new, old;
    int change;
    old = stac9460_get(ice, STAC946X_GENERAL_PURPOSE);
    new = (ucontrol->value.enumerated.item[0] << 7 & 0x80) | (old & ~0x80);
    change = (new != old);
    if (change)
        stac9460_put(ice, STAC946X_GENERAL_PURPOSE, new);
    return change;
}
/*
 * Handler for setting correct codec rate - called when rate change is detected
 */
static void stac9460_set_rate_val(struct snd_ice1712 *ice, unsigned int rate)
{
    unsigned char old, new;
    int idx;
    unsigned char changed[7];
    struct prodigy192_spec *spec = ice->spec;

    if (rate == 0)  /* no hint - S/PDIF input is master, simply return */
        return;
    else if (rate <= 48000)
        new = 0x08; /* 256x, base rate mode */
    else if (rate <= 96000)
        new = 0x11; /* 256x, mid rate mode */
    else
        new = 0x12; /* 128x, high rate mode */
    old = stac9460_get(ice, STAC946X_MASTER_CLOCKING);
    if (old == new)
        return;
    /* change detected, setting master clock, muting first */
    /* due to possible conflicts with mute controls - mutexing */
    mutex_lock(&spec->mute_mutex);
    /* we have to remember current mute status for each DAC */
    for (idx = 0; idx < 7 ; ++idx)
        changed[idx] = stac9460_dac_mute(ice,
                STAC946X_MASTER_VOLUME + idx, 0);
    /*printk(KERN_DEBUG "Rate change: %d, new MC: 0x%02x\n", rate, new);*/
    stac9460_put(ice, STAC946X_MASTER_CLOCKING, new);
    udelay(10);
    /* unmuting - only originally unmuted dacs -
     * i.e. those changed when muting */
    for (idx = 0; idx < 7 ; ++idx) {
        if (changed[idx])
            stac9460_dac_mute(ice, STAC946X_MASTER_VOLUME + idx, 1);
    }
    mutex_unlock(&spec->mute_mutex);
}


static const DECLARE_TLV_DB_SCALE(db_scale_dac, -19125, 75, 0);
static const DECLARE_TLV_DB_SCALE(db_scale_adc, 0, 150, 0);

/*
 * mixers
 */

static struct snd_kcontrol_new stac_controls[] __devinitdata = {
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Master Playback Switch",
        .info = stac9460_dac_mute_info,
        .get = stac9460_dac_mute_get,
        .put = stac9460_dac_mute_put,
        .private_value = 1,
        .tlv = { .p = db_scale_dac }
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
               SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "Master Playback Volume",
        .info = stac9460_dac_vol_info,
        .get = stac9460_dac_vol_get,
        .put = stac9460_dac_vol_put,
        .private_value = 1,
        .tlv = { .p = db_scale_dac }
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "DAC Switch",
        .count = 6,
        .info = stac9460_dac_mute_info,
        .get = stac9460_dac_mute_get,
        .put = stac9460_dac_mute_put,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
               SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "DAC Volume",
        .count = 6,
        .info = stac9460_dac_vol_info,
        .get = stac9460_dac_vol_get,
        .put = stac9460_dac_vol_put,
        .tlv = { .p = db_scale_dac }
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "ADC Capture Switch",
        .count = 1,
        .info = stac9460_adc_mute_info,
        .get = stac9460_adc_mute_get,
        .put = stac9460_adc_mute_put,

    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
               SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "ADC Capture Volume",
        .count = 1,
        .info = stac9460_adc_vol_info,
        .get = stac9460_adc_vol_get,
        .put = stac9460_adc_vol_put,
        .tlv = { .p = db_scale_adc }
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Analog Capture Input",
        .info = stac9460_mic_sw_info,
        .get = stac9460_mic_sw_get,
        .put = stac9460_mic_sw_put,

    },
};

/* AK4114 - ICE1724 connections on Prodigy192 + MI/ODI/O */
/* CDTO (pin 32) -- GPIO11 pin 86
 * CDTI (pin 33) -- GPIO10 pin 77
 * CCLK (pin 34) -- GPIO9 pin 76
 * CSN  (pin 35) -- GPIO8 pin 75
 */
#define AK4114_ADDR 0x00 /* C1-C0: Chip Address
                  * (According to datasheet fixed to “00”)
                  */

/*
 * 4wire ak4114 protocol - writing data
 */
static void write_data(struct snd_ice1712 *ice, unsigned int gpio,
               unsigned int data, int idx)
{
    for (; idx >= 0; idx--) {
        /* drop clock */
        gpio &= ~VT1724_PRODIGY192_CCLK;
        snd_ice1712_gpio_write(ice, gpio);
        udelay(1);
        /* set data */
        if (data & (1 << idx))
            gpio |= VT1724_PRODIGY192_CDOUT;
        else
            gpio &= ~VT1724_PRODIGY192_CDOUT;
        snd_ice1712_gpio_write(ice, gpio);
        udelay(1);
        /* raise clock */
        gpio |= VT1724_PRODIGY192_CCLK;
        snd_ice1712_gpio_write(ice, gpio);
        udelay(1);
    }
}

/*
 * 4wire ak4114 protocol - reading data
 */
static unsigned char read_data(struct snd_ice1712 *ice, unsigned int gpio,
                   int idx)
{
    unsigned char data = 0;

    for (; idx >= 0; idx--) {
        /* drop clock */
        gpio &= ~VT1724_PRODIGY192_CCLK;
        snd_ice1712_gpio_write(ice, gpio);
        udelay(1);
        /* read data */
        if (snd_ice1712_gpio_read(ice) & VT1724_PRODIGY192_CDIN)
            data |= (1 << idx);
        udelay(1);
        /* raise clock */
        gpio |= VT1724_PRODIGY192_CCLK;
        snd_ice1712_gpio_write(ice, gpio);
        udelay(1);
    }
    return data;
}
/*
 * 4wire ak4114 protocol - starting sequence
 */
static unsigned int prodigy192_4wire_start(struct snd_ice1712 *ice)
{
    unsigned int tmp;

    snd_ice1712_save_gpio_status(ice);
    tmp = snd_ice1712_gpio_read(ice);

    tmp |= VT1724_PRODIGY192_CCLK; /* high at init */
    tmp &= ~VT1724_PRODIGY192_CS; /* drop chip select */
    snd_ice1712_gpio_write(ice, tmp);
    udelay(1);
    return tmp;
}

/*
 * 4wire ak4114 protocol - final sequence
 */
static void prodigy192_4wire_finish(struct snd_ice1712 *ice, unsigned int tmp)
{
    tmp |= VT1724_PRODIGY192_CS; /* raise chip select */
    snd_ice1712_gpio_write(ice, tmp);
    udelay(1);
    snd_ice1712_restore_gpio_status(ice);
}

/*
 * Write data to addr register of ak4114
 */
static void prodigy192_ak4114_write(void *private_data, unsigned char addr,
                   unsigned char data)
{
    struct snd_ice1712 *ice = private_data;
    unsigned int tmp, addrdata;
    tmp = prodigy192_4wire_start(ice);
    addrdata = (AK4114_ADDR << 6) | 0x20 | (addr & 0x1f);
    addrdata = (addrdata << 8) | data;
    write_data(ice, tmp, addrdata, 15);
    prodigy192_4wire_finish(ice, tmp);
}

/*
 * Read data from addr register of ak4114
 */
static unsigned char prodigy192_ak4114_read(void *private_data,
                        unsigned char addr)
{
    struct snd_ice1712 *ice = private_data;
    unsigned int tmp;
    unsigned char data;

    tmp = prodigy192_4wire_start(ice);
    write_data(ice, tmp, (AK4114_ADDR << 6) | (addr & 0x1f), 7);
    data = read_data(ice, tmp, 7);
    prodigy192_4wire_finish(ice, tmp);
    return data;
}


static int ak4114_input_sw_info(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_info *uinfo)
{
    static char *texts[2] = { "Toslink", "Coax" };

    uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
    uinfo->count = 1;
    uinfo->value.enumerated.items = 2;
    if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items)
        uinfo->value.enumerated.item = uinfo->value.enumerated.items - 1;
    strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
        return 0;
}


static int ak4114_input_sw_get(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char val;
        
    val = prodigy192_ak4114_read(ice, AK4114_REG_IO1);
    /* AK4114_IPS0 bit = 0 -> RX0 = Toslink
     * AK4114_IPS0 bit = 1 -> RX1 = Coax
     */
    ucontrol->value.enumerated.item[0] = (val & AK4114_IPS0) ? 1 : 0;
    return 0;
}

static int ak4114_input_sw_put(struct snd_kcontrol *kcontrol,
                struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char new, old, itemvalue;
    int change;

    old = prodigy192_ak4114_read(ice, AK4114_REG_IO1);
    /* AK4114_IPS0 could be any bit */
    itemvalue = (ucontrol->value.enumerated.item[0]) ? 0xff : 0x00;

    new = (itemvalue & AK4114_IPS0) | (old & ~AK4114_IPS0);
    change = (new != old);
    if (change)
        prodigy192_ak4114_write(ice, AK4114_REG_IO1, new);
    return change;
}


static struct snd_kcontrol_new ak4114_controls[] __devinitdata = {
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "MIODIO IEC958 Capture Input",
        .info = ak4114_input_sw_info,
        .get = ak4114_input_sw_get,
        .put = ak4114_input_sw_put,

    }
};


static int prodigy192_ak4114_init(struct snd_ice1712 *ice)
{
    static const unsigned char ak4114_init_vals[] = {
        AK4114_RST | AK4114_PWN | AK4114_OCKS0 | AK4114_OCKS1,
        /* ice1724 expects I2S and provides clock,
         * DEM0 disables the deemphasis filter
         */
        AK4114_DIF_I24I2S | AK4114_DEM0 ,
        AK4114_TX1E,
        AK4114_EFH_1024 | AK4114_DIT, /* default input RX0 */
        0,
        0
    };
    static const unsigned char ak4114_init_txcsb[] = {
        0x41, 0x02, 0x2c, 0x00, 0x00
    };
    struct prodigy192_spec *spec = ice->spec;
    int err;

    err = snd_ak4114_create(ice->card,
                 prodigy192_ak4114_read,
                 prodigy192_ak4114_write,
                 ak4114_init_vals, ak4114_init_txcsb,
                 ice, &spec->ak4114);
    if (err < 0)
        return err;
    /* AK4114 in Prodigy192 cannot detect external rate correctly.
     * No reason to stop capture stream due to incorrect checks */
    spec->ak4114->check_flags = AK4114_CHECK_NO_RATE;
    return 0;
}

static void stac9460_proc_regs_read(struct snd_info_entry *entry,
        struct snd_info_buffer *buffer)
{
    struct snd_ice1712 *ice = entry->private_data;
    int reg, val;
    /* registers 0x0 - 0x14 */
    for (reg = 0; reg <= 0x15; reg++) {
        val = stac9460_get(ice, reg);
        snd_iprintf(buffer, "0x%02x = 0x%02x\n", reg, val);
    }
}


static void stac9460_proc_init(struct snd_ice1712 *ice)
{
    struct snd_info_entry *entry;
    if (!snd_card_proc_new(ice->card, "stac9460_codec", &entry))
        snd_info_set_text_ops(entry, ice, stac9460_proc_regs_read);
}


static int __devinit prodigy192_add_controls(struct snd_ice1712 *ice)
{
    struct prodigy192_spec *spec = ice->spec;
    unsigned int i;
    int err;

    for (i = 0; i < ARRAY_SIZE(stac_controls); i++) {
        err = snd_ctl_add(ice->card,
                  snd_ctl_new1(&stac_controls[i], ice));
        if (err < 0)
            return err;
    }
    if (spec->ak4114) {
        /* ak4114 is connected */
        for (i = 0; i < ARRAY_SIZE(ak4114_controls); i++) {
            err = snd_ctl_add(ice->card,
                      snd_ctl_new1(&ak4114_controls[i],
                               ice));
            if (err < 0)
                return err;
        }
        err = snd_ak4114_build(spec->ak4114,
                NULL, /* ak4114 in MIO/DI/O handles no IEC958 output */
                ice->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
        if (err < 0)
            return err;
    }
    stac9460_proc_init(ice);
    return 0;
}

/*
 * check for presence of MI/ODI/O add-on card with digital inputs
 */
static int prodigy192_miodio_exists(struct snd_ice1712 *ice)
{

    unsigned char orig_value;
    const unsigned char test_data = 0xd1;   /* random value */
    unsigned char addr = AK4114_REG_INT0_MASK; /* random SAFE address */
    int exists = 0;

    orig_value = prodigy192_ak4114_read(ice, addr);
    prodigy192_ak4114_write(ice, addr, test_data);
    if (prodigy192_ak4114_read(ice, addr) == test_data) {
        /* ak4114 seems to communicate, apparently exists */
        /* writing back original value */
        prodigy192_ak4114_write(ice, addr, orig_value);
        exists = 1;
    }
    return exists;
}

/*
 * initialize the chip
 */
static int __devinit prodigy192_init(struct snd_ice1712 *ice)
{
    static const unsigned short stac_inits_prodigy[] = {
        STAC946X_RESET, 0,
        STAC946X_MASTER_CLOCKING, 0x11,
/*      STAC946X_MASTER_VOLUME, 0,
        STAC946X_LF_VOLUME, 0,
        STAC946X_RF_VOLUME, 0,
        STAC946X_LR_VOLUME, 0,
        STAC946X_RR_VOLUME, 0,
        STAC946X_CENTER_VOLUME, 0,
        STAC946X_LFE_VOLUME, 0,*/
        (unsigned short)-1
    };
    const unsigned short *p;
    int err = 0;
    struct prodigy192_spec *spec;

    /* prodigy 192 */
    ice->num_total_dacs = 6;
    ice->num_total_adcs = 2;
    ice->vt1720 = 0;  /* ice1724, e.g. 23 GPIOs */
    
    spec = kzalloc(sizeof(*spec), GFP_KERNEL);
    if (!spec)
        return -ENOMEM;
    ice->spec = spec;
    mutex_init(&spec->mute_mutex);

    /* initialize codec */
    p = stac_inits_prodigy;
    for (; *p != (unsigned short)-1; p += 2)
        stac9460_put(ice, p[0], p[1]);
    ice->gpio.set_pro_rate = stac9460_set_rate_val;

    /* MI/ODI/O add on card with AK4114 */
    if (prodigy192_miodio_exists(ice)) {
        err = prodigy192_ak4114_init(ice);
        /* from this moment if err = 0 then
         * spec->ak4114 should not be null
         */
        snd_printdd("AK4114 initialized with status %d\n", err);
    } else
        snd_printdd("AK4114 not found\n");
    if (err < 0)
        return err;

    return 0;
}


/*
 * Aureon boards don't provide the EEPROM data except for the vendor IDs.
 * hence the driver needs to sets up it properly.
 */

static unsigned char prodigy71_eeprom[] __devinitdata = {
    [ICE_EEP2_SYSCONF]     = 0x6a,  /* 49MHz crystal, mpu401,
                     * spdif-in+ 1 stereo ADC,
                     * 3 stereo DACs
                     */
    [ICE_EEP2_ACLINK]      = 0x80,  /* I2S */
    [ICE_EEP2_I2S]         = 0xf8,  /* vol, 96k, 24bit, 192k */
    [ICE_EEP2_SPDIF]       = 0xc3,  /* out-en, out-int, spdif-in */
    [ICE_EEP2_GPIO_DIR]    = 0xff,
    [ICE_EEP2_GPIO_DIR1]   = ~(VT1724_PRODIGY192_CDIN >> 8) ,
    [ICE_EEP2_GPIO_DIR2]   = 0xbf,
    [ICE_EEP2_GPIO_MASK]   = 0x00,
    [ICE_EEP2_GPIO_MASK1]  = 0x00,
    [ICE_EEP2_GPIO_MASK2]  = 0x00,
    [ICE_EEP2_GPIO_STATE]  = 0x00,
    [ICE_EEP2_GPIO_STATE1] = 0x00,
    [ICE_EEP2_GPIO_STATE2] = 0x10,  /* GPIO20: 0 = CD drive dig. input
                     * passthrough,
                     * 1 = SPDIF-OUT from ice1724
                     */
};


/* entry point */
struct snd_ice1712_card_info snd_vt1724_prodigy192_cards[] __devinitdata = {
    {
        .subvendor = VT1724_SUBDEVICE_PRODIGY192VE,
        .name = "Audiotrak Prodigy 192",
        .model = "prodigy192",
        .chip_init = prodigy192_init,
        .build_controls = prodigy192_add_controls,
        .eeprom_size = sizeof(prodigy71_eeprom),
        .eeprom_data = prodigy71_eeprom,
    },
    { } /* terminator */
};