delta.c

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/*
 *   ALSA driver for ICEnsemble ICE1712 (Envy24)
 *
 *   Lowlevel functions for M-Audio Delta 1010, 1010E, 44, 66, 66E, Dio2496,
 *              Audiophile, Digigram VX442
 *
 *  Copyright (c) 2000 Jaroslav Kysela <[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 <linux/mutex.h>

#include <sound/core.h>
#include <sound/cs8427.h>
#include <sound/asoundef.h>

#include "ice1712.h"
#include "delta.h"

#define SND_CS8403
#include <sound/cs8403.h>


/*
 * CS8427 via SPI mode (for Audiophile), emulated I2C
 */

/* send 8 bits */
static void ap_cs8427_write_byte(struct snd_ice1712 *ice, unsigned char data, unsigned char tmp)
{
    int idx;

    for (idx = 7; idx >= 0; idx--) {
        tmp &= ~(ICE1712_DELTA_AP_DOUT|ICE1712_DELTA_AP_CCLK);
        if (data & (1 << idx))
            tmp |= ICE1712_DELTA_AP_DOUT;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(5);
        tmp |= ICE1712_DELTA_AP_CCLK;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(5);
    }
}

/* read 8 bits */
static unsigned char ap_cs8427_read_byte(struct snd_ice1712 *ice, unsigned char tmp)
{
    unsigned char data = 0;
    int idx;
    
    for (idx = 7; idx >= 0; idx--) {
        tmp &= ~ICE1712_DELTA_AP_CCLK;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(5);
        if (snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA) & ICE1712_DELTA_AP_DIN)
            data |= 1 << idx;
        tmp |= ICE1712_DELTA_AP_CCLK;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(5);
    }
    return data;
}

/* assert chip select */
static unsigned char ap_cs8427_codec_select(struct snd_ice1712 *ice)
{
    unsigned char tmp;
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTA1010LT:
        tmp &= ~ICE1712_DELTA_1010LT_CS;
        tmp |= ICE1712_DELTA_1010LT_CCLK | ICE1712_DELTA_1010LT_CS_CS8427;
        break;
    case ICE1712_SUBDEVICE_AUDIOPHILE:
    case ICE1712_SUBDEVICE_DELTA410:
        tmp |= ICE1712_DELTA_AP_CCLK | ICE1712_DELTA_AP_CS_CODEC;
        tmp &= ~ICE1712_DELTA_AP_CS_DIGITAL;
        break;
    case ICE1712_SUBDEVICE_DELTA66E:
        tmp |= ICE1712_DELTA_66E_CCLK | ICE1712_DELTA_66E_CS_CHIP_A |
               ICE1712_DELTA_66E_CS_CHIP_B;
        tmp &= ~ICE1712_DELTA_66E_CS_CS8427;
        break;
    case ICE1712_SUBDEVICE_VX442:
        tmp |= ICE1712_VX442_CCLK | ICE1712_VX442_CODEC_CHIP_A | ICE1712_VX442_CODEC_CHIP_B;
        tmp &= ~ICE1712_VX442_CS_DIGITAL;
        break;
    }
    snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
    udelay(5);
    return tmp;
}

/* deassert chip select */
static void ap_cs8427_codec_deassert(struct snd_ice1712 *ice, unsigned char tmp)
{
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTA1010LT:
        tmp &= ~ICE1712_DELTA_1010LT_CS;
        tmp |= ICE1712_DELTA_1010LT_CS_NONE;
        break;
    case ICE1712_SUBDEVICE_AUDIOPHILE:
    case ICE1712_SUBDEVICE_DELTA410:
        tmp |= ICE1712_DELTA_AP_CS_DIGITAL;
        break;
    case ICE1712_SUBDEVICE_DELTA66E:
        tmp |= ICE1712_DELTA_66E_CS_CS8427;
        break;
    case ICE1712_SUBDEVICE_VX442:
        tmp |= ICE1712_VX442_CS_DIGITAL;
        break;
    }
    snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
}

/* sequential write */
static int ap_cs8427_sendbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
{
    struct snd_ice1712 *ice = device->bus->private_data;
    int res = count;
    unsigned char tmp;

    mutex_lock(&ice->gpio_mutex);
    tmp = ap_cs8427_codec_select(ice);
    ap_cs8427_write_byte(ice, (device->addr << 1) | 0, tmp); /* address + write mode */
    while (count-- > 0)
        ap_cs8427_write_byte(ice, *bytes++, tmp);
    ap_cs8427_codec_deassert(ice, tmp);
    mutex_unlock(&ice->gpio_mutex);
    return res;
}

/* sequential read */
static int ap_cs8427_readbytes(struct snd_i2c_device *device, unsigned char *bytes, int count)
{
    struct snd_ice1712 *ice = device->bus->private_data;
    int res = count;
    unsigned char tmp;
    
    mutex_lock(&ice->gpio_mutex);
    tmp = ap_cs8427_codec_select(ice);
    ap_cs8427_write_byte(ice, (device->addr << 1) | 1, tmp); /* address + read mode */
    while (count-- > 0)
        *bytes++ = ap_cs8427_read_byte(ice, tmp);
    ap_cs8427_codec_deassert(ice, tmp);
    mutex_unlock(&ice->gpio_mutex);
    return res;
}

static int ap_cs8427_probeaddr(struct snd_i2c_bus *bus, unsigned short addr)
{
    if (addr == 0x10)
        return 1;
    return -ENOENT;
}

static struct snd_i2c_ops ap_cs8427_i2c_ops = {
    .sendbytes = ap_cs8427_sendbytes,
    .readbytes = ap_cs8427_readbytes,
    .probeaddr = ap_cs8427_probeaddr,
};

/*
 */

static void snd_ice1712_delta_cs8403_spdif_write(struct snd_ice1712 *ice, unsigned char bits)
{
    unsigned char tmp, mask1, mask2;
    int idx;
    /* send byte to transmitter */
    mask1 = ICE1712_DELTA_SPDIF_OUT_STAT_CLOCK;
    mask2 = ICE1712_DELTA_SPDIF_OUT_STAT_DATA;
    mutex_lock(&ice->gpio_mutex);
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
    for (idx = 7; idx >= 0; idx--) {
        tmp &= ~(mask1 | mask2);
        if (bits & (1 << idx))
            tmp |= mask2;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(100);
        tmp |= mask1;
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
        udelay(100);
    }
    tmp &= ~mask1;
    snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
    mutex_unlock(&ice->gpio_mutex);
}


static void delta_spdif_default_get(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
    snd_cs8403_decode_spdif_bits(&ucontrol->value.iec958, ice->spdif.cs8403_bits);
}

static int delta_spdif_default_put(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
    unsigned int val;
    int change;

    val = snd_cs8403_encode_spdif_bits(&ucontrol->value.iec958);
    spin_lock_irq(&ice->reg_lock);
    change = ice->spdif.cs8403_bits != val;
    ice->spdif.cs8403_bits = val;
    if (change && ice->playback_pro_substream == NULL) {
        spin_unlock_irq(&ice->reg_lock);
        snd_ice1712_delta_cs8403_spdif_write(ice, val);
    } else {
        spin_unlock_irq(&ice->reg_lock);
    }
    return change;
}

static void delta_spdif_stream_get(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
    snd_cs8403_decode_spdif_bits(&ucontrol->value.iec958, ice->spdif.cs8403_stream_bits);
}

static int delta_spdif_stream_put(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
    unsigned int val;
    int change;

    val = snd_cs8403_encode_spdif_bits(&ucontrol->value.iec958);
    spin_lock_irq(&ice->reg_lock);
    change = ice->spdif.cs8403_stream_bits != val;
    ice->spdif.cs8403_stream_bits = val;
    if (change && ice->playback_pro_substream != NULL) {
        spin_unlock_irq(&ice->reg_lock);
        snd_ice1712_delta_cs8403_spdif_write(ice, val);
    } else {
        spin_unlock_irq(&ice->reg_lock);
    }
    return change;
}


/*
 * AK4524 on Delta 44 and 66 to choose the chip mask
 */
static void delta_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
        struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
        struct snd_ice1712 *ice = ak->private_data[0];

    snd_ice1712_save_gpio_status(ice);
    priv->cs_mask =
    priv->cs_addr = chip == 0 ? ICE1712_DELTA_CODEC_CHIP_A :
                    ICE1712_DELTA_CODEC_CHIP_B;
}

/*
 * AK4524 on Delta1010LT to choose the chip address
 */
static void delta1010lt_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
        struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
        struct snd_ice1712 *ice = ak->private_data[0];

    snd_ice1712_save_gpio_status(ice);
    priv->cs_mask = ICE1712_DELTA_1010LT_CS;
    priv->cs_addr = chip << 4;
}

/*
 * AK4524 on Delta66 rev E to choose the chip address
 */
static void delta66e_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
    struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
    struct snd_ice1712 *ice = ak->private_data[0];

    snd_ice1712_save_gpio_status(ice);
    priv->cs_mask =
    priv->cs_addr = chip == 0 ? ICE1712_DELTA_66E_CS_CHIP_A :
                    ICE1712_DELTA_66E_CS_CHIP_B;
}

/*
 * AK4528 on VX442 to choose the chip mask
 */
static void vx442_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
        struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
        struct snd_ice1712 *ice = ak->private_data[0];

    snd_ice1712_save_gpio_status(ice);
    priv->cs_mask =
    priv->cs_addr = chip == 0 ? ICE1712_VX442_CODEC_CHIP_A :
                    ICE1712_VX442_CODEC_CHIP_B;
}

/*
 * change the DFS bit according rate for Delta1010
 */
static void delta_1010_set_rate_val(struct snd_ice1712 *ice, unsigned int rate)
{
    unsigned char tmp, tmp2;

    if (rate == 0)  /* no hint - S/PDIF input is master, simply return */
        return;

    mutex_lock(&ice->gpio_mutex);
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
    tmp2 = tmp & ~ICE1712_DELTA_DFS;
    if (rate > 48000)
        tmp2 |= ICE1712_DELTA_DFS;
    if (tmp != tmp2)
        snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp2);
    mutex_unlock(&ice->gpio_mutex);
}

/*
 * change the rate of AK4524 on Delta 44/66, AP, 1010LT
 */
static void delta_ak4524_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
{
    unsigned char tmp, tmp2;
    struct snd_ice1712 *ice = ak->private_data[0];

    if (rate == 0)  /* no hint - S/PDIF input is master, simply return */
        return;

    /* check before reset ak4524 to avoid unnecessary clicks */
    mutex_lock(&ice->gpio_mutex);
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
    mutex_unlock(&ice->gpio_mutex);
    tmp2 = tmp & ~ICE1712_DELTA_DFS; 
    if (rate > 48000)
        tmp2 |= ICE1712_DELTA_DFS;
    if (tmp == tmp2)
        return;

    /* do it again */
    snd_akm4xxx_reset(ak, 1);
    mutex_lock(&ice->gpio_mutex);
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA) & ~ICE1712_DELTA_DFS;
    if (rate > 48000)
        tmp |= ICE1712_DELTA_DFS;
    snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
    mutex_unlock(&ice->gpio_mutex);
    snd_akm4xxx_reset(ak, 0);
}

/*
 * change the rate of AK4524 on VX442
 */
static void vx442_ak4524_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
{
    unsigned char val;

    val = (rate > 48000) ? 0x65 : 0x60;
    if (snd_akm4xxx_get(ak, 0, 0x02) != val ||
        snd_akm4xxx_get(ak, 1, 0x02) != val) {
        snd_akm4xxx_reset(ak, 1);
        snd_akm4xxx_write(ak, 0, 0x02, val);
        snd_akm4xxx_write(ak, 1, 0x02, val);
        snd_akm4xxx_reset(ak, 0);
    }
}


/*
 * SPDIF ops for Delta 1010, Dio, 66
 */

/* open callback */
static void delta_open_spdif(struct snd_ice1712 *ice, struct snd_pcm_substream *substream)
{
    ice->spdif.cs8403_stream_bits = ice->spdif.cs8403_bits;
}

/* set up */
static void delta_setup_spdif(struct snd_ice1712 *ice, int rate)
{
    unsigned long flags;
    unsigned int tmp;
    int change;

    spin_lock_irqsave(&ice->reg_lock, flags);
    tmp = ice->spdif.cs8403_stream_bits;
    if (tmp & 0x01)     /* consumer */
        tmp &= (tmp & 0x01) ? ~0x06 : ~0x18;
    switch (rate) {
    case 32000: tmp |= (tmp & 0x01) ? 0x04 : 0x00; break;
    case 44100: tmp |= (tmp & 0x01) ? 0x00 : 0x10; break;
    case 48000: tmp |= (tmp & 0x01) ? 0x02 : 0x08; break;
    default: tmp |= (tmp & 0x01) ? 0x00 : 0x18; break;
    }
    change = ice->spdif.cs8403_stream_bits != tmp;
    ice->spdif.cs8403_stream_bits = tmp;
    spin_unlock_irqrestore(&ice->reg_lock, flags);
    if (change)
        snd_ctl_notify(ice->card, SNDRV_CTL_EVENT_MASK_VALUE, &ice->spdif.stream_ctl->id);
    snd_ice1712_delta_cs8403_spdif_write(ice, tmp);
}

#define snd_ice1712_delta1010lt_wordclock_status_info \
    snd_ctl_boolean_mono_info

static int snd_ice1712_delta1010lt_wordclock_status_get(struct snd_kcontrol *kcontrol,
             struct snd_ctl_elem_value *ucontrol)
{
    char reg = 0x10; /* CS8427 receiver error register */
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);

    if (snd_i2c_sendbytes(ice->cs8427, &reg, 1) != 1)
        snd_printk(KERN_ERR "unable to send register 0x%x byte to CS8427\n", reg);
    snd_i2c_readbytes(ice->cs8427, &reg, 1);
    ucontrol->value.integer.value[0] = (reg & CS8427_UNLOCK) ? 1 : 0;
    return 0;
}

static struct snd_kcontrol_new snd_ice1712_delta1010lt_wordclock_status __devinitdata =
{
    .access =   (SNDRV_CTL_ELEM_ACCESS_READ),
    .iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
    .name =         "Word Clock Status",
    .info =     snd_ice1712_delta1010lt_wordclock_status_info,
    .get =      snd_ice1712_delta1010lt_wordclock_status_get,
};

/*
 * initialize the chips on M-Audio cards
 */

static struct snd_akm4xxx akm_audiophile __devinitdata = {
    .type = SND_AK4528,
    .num_adcs = 2,
    .num_dacs = 2,
    .ops = {
        .set_rate_val = delta_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_audiophile_priv __devinitdata = {
    .caddr = 2,
    .cif = 0,
    .data_mask = ICE1712_DELTA_AP_DOUT,
    .clk_mask = ICE1712_DELTA_AP_CCLK,
    .cs_mask = ICE1712_DELTA_AP_CS_CODEC,
    .cs_addr = ICE1712_DELTA_AP_CS_CODEC,
    .cs_none = 0,
    .add_flags = ICE1712_DELTA_AP_CS_DIGITAL,
    .mask_flags = 0,
};

static struct snd_akm4xxx akm_delta410 __devinitdata = {
    .type = SND_AK4529,
    .num_adcs = 2,
    .num_dacs = 8,
    .ops = {
        .set_rate_val = delta_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_delta410_priv __devinitdata = {
    .caddr = 0,
    .cif = 0,
    .data_mask = ICE1712_DELTA_AP_DOUT,
    .clk_mask = ICE1712_DELTA_AP_CCLK,
    .cs_mask = ICE1712_DELTA_AP_CS_CODEC,
    .cs_addr = ICE1712_DELTA_AP_CS_CODEC,
    .cs_none = 0,
    .add_flags = ICE1712_DELTA_AP_CS_DIGITAL,
    .mask_flags = 0,
};

static struct snd_akm4xxx akm_delta1010lt __devinitdata = {
    .type = SND_AK4524,
    .num_adcs = 8,
    .num_dacs = 8,
    .ops = {
        .lock = delta1010lt_ak4524_lock,
        .set_rate_val = delta_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_delta1010lt_priv __devinitdata = {
    .caddr = 2,
    .cif = 0, /* the default level of the CIF pin from AK4524 */
    .data_mask = ICE1712_DELTA_1010LT_DOUT,
    .clk_mask = ICE1712_DELTA_1010LT_CCLK,
    .cs_mask = 0,
    .cs_addr = 0, /* set later */
    .cs_none = ICE1712_DELTA_1010LT_CS_NONE,
    .add_flags = 0,
    .mask_flags = 0,
};

static struct snd_akm4xxx akm_delta66e __devinitdata = {
    .type = SND_AK4524,
    .num_adcs = 4,
    .num_dacs = 4,
    .ops = {
        .lock = delta66e_ak4524_lock,
        .set_rate_val = delta_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_delta66e_priv __devinitdata = {
    .caddr = 2,
    .cif = 0, /* the default level of the CIF pin from AK4524 */
    .data_mask = ICE1712_DELTA_66E_DOUT,
    .clk_mask = ICE1712_DELTA_66E_CCLK,
    .cs_mask = 0,
    .cs_addr = 0, /* set later */
    .cs_none = 0,
    .add_flags = 0,
    .mask_flags = 0,
};


static struct snd_akm4xxx akm_delta44 __devinitdata = {
    .type = SND_AK4524,
    .num_adcs = 4,
    .num_dacs = 4,
    .ops = {
        .lock = delta_ak4524_lock,
        .set_rate_val = delta_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_delta44_priv __devinitdata = {
    .caddr = 2,
    .cif = 0, /* the default level of the CIF pin from AK4524 */
    .data_mask = ICE1712_DELTA_CODEC_SERIAL_DATA,
    .clk_mask = ICE1712_DELTA_CODEC_SERIAL_CLOCK,
    .cs_mask = 0,
    .cs_addr = 0, /* set later */
    .cs_none = 0,
    .add_flags = 0,
    .mask_flags = 0,
};

static struct snd_akm4xxx akm_vx442 __devinitdata = {
    .type = SND_AK4524,
    .num_adcs = 4,
    .num_dacs = 4,
    .ops = {
        .lock = vx442_ak4524_lock,
        .set_rate_val = vx442_ak4524_set_rate_val
    }
};

static struct snd_ak4xxx_private akm_vx442_priv __devinitdata = {
    .caddr = 2,
    .cif = 0,
    .data_mask = ICE1712_VX442_DOUT,
    .clk_mask = ICE1712_VX442_CCLK,
    .cs_mask = 0,
    .cs_addr = 0, /* set later */
    .cs_none = 0,
    .add_flags = 0,
    .mask_flags = 0,
};

static int __devinit snd_ice1712_delta_init(struct snd_ice1712 *ice)
{
    int err;
    struct snd_akm4xxx *ak;
    unsigned char tmp;

    if (ice->eeprom.subvendor == ICE1712_SUBDEVICE_DELTA1010 &&
        ice->eeprom.gpiodir == 0x7b)
        ice->eeprom.subvendor = ICE1712_SUBDEVICE_DELTA1010E;

    if (ice->eeprom.subvendor == ICE1712_SUBDEVICE_DELTA66 &&
        ice->eeprom.gpiodir == 0xfb)
            ice->eeprom.subvendor = ICE1712_SUBDEVICE_DELTA66E;

    /* determine I2C, DACs and ADCs */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_AUDIOPHILE:
        ice->num_total_dacs = 2;
        ice->num_total_adcs = 2;
        break;
    case ICE1712_SUBDEVICE_DELTA410:
        ice->num_total_dacs = 8;
        ice->num_total_adcs = 2;
        break;
    case ICE1712_SUBDEVICE_DELTA44:
    case ICE1712_SUBDEVICE_DELTA66:
        ice->num_total_dacs = ice->omni ? 8 : 4;
        ice->num_total_adcs = ice->omni ? 8 : 4;
        break;
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTA1010LT:
    case ICE1712_SUBDEVICE_MEDIASTATION:
    case ICE1712_SUBDEVICE_EDIROLDA2496:
        ice->num_total_dacs = 8;
        ice->num_total_adcs = 8;
        break;
    case ICE1712_SUBDEVICE_DELTADIO2496:
        ice->num_total_dacs = 4;    /* two AK4324 codecs */
        break;
    case ICE1712_SUBDEVICE_VX442:
    case ICE1712_SUBDEVICE_DELTA66E:    /* omni not suported yet */
        ice->num_total_dacs = 4;
        ice->num_total_adcs = 4;
        break;
    }

    /* initialize the SPI clock to high */
    tmp = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
    tmp |= ICE1712_DELTA_AP_CCLK;
    snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
    udelay(5);

    /* initialize spdif */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_AUDIOPHILE:
    case ICE1712_SUBDEVICE_DELTA410:
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTA1010LT:
    case ICE1712_SUBDEVICE_VX442:
    case ICE1712_SUBDEVICE_DELTA66E:
        if ((err = snd_i2c_bus_create(ice->card, "ICE1712 GPIO 1", NULL, &ice->i2c)) < 0) {
            snd_printk(KERN_ERR "unable to create I2C bus\n");
            return err;
        }
        ice->i2c->private_data = ice;
        ice->i2c->ops = &ap_cs8427_i2c_ops;
        if ((err = snd_ice1712_init_cs8427(ice, CS8427_BASE_ADDR)) < 0)
            return err;
        break;
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_MEDIASTATION:
        ice->gpio.set_pro_rate = delta_1010_set_rate_val;
        break;
    case ICE1712_SUBDEVICE_DELTADIO2496:
        ice->gpio.set_pro_rate = delta_1010_set_rate_val;
        /* fall thru */
    case ICE1712_SUBDEVICE_DELTA66:
        ice->spdif.ops.open = delta_open_spdif;
        ice->spdif.ops.setup_rate = delta_setup_spdif;
        ice->spdif.ops.default_get = delta_spdif_default_get;
        ice->spdif.ops.default_put = delta_spdif_default_put;
        ice->spdif.ops.stream_get = delta_spdif_stream_get;
        ice->spdif.ops.stream_put = delta_spdif_stream_put;
        /* Set spdif defaults */
        snd_ice1712_delta_cs8403_spdif_write(ice, ice->spdif.cs8403_bits);
        break;
    }

    /* no analog? */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTADIO2496:
    case ICE1712_SUBDEVICE_MEDIASTATION:
        return 0;
    }

    /* second stage of initialization, analog parts and others */
    ak = ice->akm = kmalloc(sizeof(struct snd_akm4xxx), GFP_KERNEL);
    if (! ak)
        return -ENOMEM;
    ice->akm_codecs = 1;

    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_AUDIOPHILE:
        err = snd_ice1712_akm4xxx_init(ak, &akm_audiophile, &akm_audiophile_priv, ice);
        break;
    case ICE1712_SUBDEVICE_DELTA410:
        err = snd_ice1712_akm4xxx_init(ak, &akm_delta410, &akm_delta410_priv, ice);
        break;
    case ICE1712_SUBDEVICE_DELTA1010LT:
    case ICE1712_SUBDEVICE_EDIROLDA2496:
        err = snd_ice1712_akm4xxx_init(ak, &akm_delta1010lt, &akm_delta1010lt_priv, ice);
        break;
    case ICE1712_SUBDEVICE_DELTA66:
    case ICE1712_SUBDEVICE_DELTA44:
        err = snd_ice1712_akm4xxx_init(ak, &akm_delta44, &akm_delta44_priv, ice);
        break;
    case ICE1712_SUBDEVICE_VX442:
        err = snd_ice1712_akm4xxx_init(ak, &akm_vx442, &akm_vx442_priv, ice);
        break;
    case ICE1712_SUBDEVICE_DELTA66E:
        err = snd_ice1712_akm4xxx_init(ak, &akm_delta66e, &akm_delta66e_priv, ice);
        break;
    default:
        snd_BUG();
        return -EINVAL;
    }

    return err;
}


/*
 * additional controls for M-Audio cards
 */

static struct snd_kcontrol_new snd_ice1712_delta1010_wordclock_select __devinitdata =
ICE1712_GPIO(SNDRV_CTL_ELEM_IFACE_MIXER, "Word Clock Sync", 0, ICE1712_DELTA_WORD_CLOCK_SELECT, 1, 0);
static struct snd_kcontrol_new snd_ice1712_delta1010lt_wordclock_select __devinitdata =
ICE1712_GPIO(SNDRV_CTL_ELEM_IFACE_MIXER, "Word Clock Sync", 0, ICE1712_DELTA_1010LT_WORDCLOCK, 0, 0);
static struct snd_kcontrol_new snd_ice1712_delta1010_wordclock_status __devinitdata =
ICE1712_GPIO(SNDRV_CTL_ELEM_IFACE_MIXER, "Word Clock Status", 0, ICE1712_DELTA_WORD_CLOCK_STATUS, 1, SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE);
static struct snd_kcontrol_new snd_ice1712_deltadio2496_spdif_in_select __devinitdata =
ICE1712_GPIO(SNDRV_CTL_ELEM_IFACE_MIXER, "IEC958 Input Optical", 0, ICE1712_DELTA_SPDIF_INPUT_SELECT, 0, 0);
static struct snd_kcontrol_new snd_ice1712_delta_spdif_in_status __devinitdata =
ICE1712_GPIO(SNDRV_CTL_ELEM_IFACE_MIXER, "Delta IEC958 Input Status", 0, ICE1712_DELTA_SPDIF_IN_STAT, 1, SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE);


static int __devinit snd_ice1712_delta_add_controls(struct snd_ice1712 *ice)
{
    int err;

    /* 1010 and dio specific controls */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_MEDIASTATION:
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_delta1010_wordclock_select, ice));
        if (err < 0)
            return err;
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_delta1010_wordclock_status, ice));
        if (err < 0)
            return err;
        break;
    case ICE1712_SUBDEVICE_DELTADIO2496:
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_deltadio2496_spdif_in_select, ice));
        if (err < 0)
            return err;
        break;
    case ICE1712_SUBDEVICE_DELTA1010E:
    case ICE1712_SUBDEVICE_DELTA1010LT:
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_delta1010lt_wordclock_select, ice));
        if (err < 0)
            return err;
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_delta1010lt_wordclock_status, ice));
        if (err < 0)
            return err;
        break;
    }

    /* normal spdif controls */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_DELTADIO2496:
    case ICE1712_SUBDEVICE_DELTA66:
    case ICE1712_SUBDEVICE_MEDIASTATION:
        err = snd_ice1712_spdif_build_controls(ice);
        if (err < 0)
            return err;
        break;
    }

    /* spdif status in */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010:
    case ICE1712_SUBDEVICE_DELTADIO2496:
    case ICE1712_SUBDEVICE_DELTA66:
    case ICE1712_SUBDEVICE_MEDIASTATION:
        err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_delta_spdif_in_status, ice));
        if (err < 0)
            return err;
        break;
    }

    /* ak4524 controls */
    switch (ice->eeprom.subvendor) {
    case ICE1712_SUBDEVICE_DELTA1010LT:
    case ICE1712_SUBDEVICE_AUDIOPHILE:
    case ICE1712_SUBDEVICE_DELTA410:
    case ICE1712_SUBDEVICE_DELTA44:
    case ICE1712_SUBDEVICE_DELTA66:
    case ICE1712_SUBDEVICE_VX442:
    case ICE1712_SUBDEVICE_DELTA66E:
    case ICE1712_SUBDEVICE_EDIROLDA2496:
        err = snd_ice1712_akm4xxx_build_controls(ice);
        if (err < 0)
            return err;
        break;
    }

    return 0;
}


/* entry point */
struct snd_ice1712_card_info snd_ice1712_delta_cards[] __devinitdata = {
    {
        .subvendor = ICE1712_SUBDEVICE_DELTA1010,
        .name = "M Audio Delta 1010",
        .model = "delta1010",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_DELTADIO2496,
        .name = "M Audio Delta DiO 2496",
        .model = "dio2496",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
        .no_mpu401 = 1,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_DELTA66,
        .name = "M Audio Delta 66",
        .model = "delta66",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
        .no_mpu401 = 1,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_DELTA44,
        .name = "M Audio Delta 44",
        .model = "delta44",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
        .no_mpu401 = 1,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_AUDIOPHILE,
        .name = "M Audio Audiophile 24/96",
        .model = "audiophile",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_DELTA410,
        .name = "M Audio Delta 410",
        .model = "delta410",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_DELTA1010LT,
        .name = "M Audio Delta 1010LT",
        .model = "delta1010lt",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_VX442,
        .name = "Digigram VX442",
        .model = "vx442",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
        .no_mpu401 = 1,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_MEDIASTATION,
        .name = "Lionstracs Mediastation",
        .model = "mediastation",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    {
        .subvendor = ICE1712_SUBDEVICE_EDIROLDA2496,
        .name = "Edirol DA2496",
        .model = "da2496",
        .chip_init = snd_ice1712_delta_init,
        .build_controls = snd_ice1712_delta_add_controls,
    },
    { } /* terminator */
};