pontis.c

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/*
 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
 *
 *   Lowlevel functions for Pontis MS300
 *
 *  Copyright (c) 2004 Takashi Iwai <[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/info.h>
#include <sound/tlv.h>

#include "ice1712.h"
#include "envy24ht.h"
#include "pontis.h"

/* I2C addresses */
#define WM_DEV      0x34
#define CS_DEV      0x20

/* WM8776 registers */
#define WM_HP_ATTEN_L       0x00    /* headphone left attenuation */
#define WM_HP_ATTEN_R       0x01    /* headphone left attenuation */
#define WM_HP_MASTER        0x02    /* headphone master (both channels) */
                    /* override LLR */
#define WM_DAC_ATTEN_L      0x03    /* digital left attenuation */
#define WM_DAC_ATTEN_R      0x04
#define WM_DAC_MASTER       0x05
#define WM_PHASE_SWAP       0x06    /* DAC phase swap */
#define WM_DAC_CTRL1        0x07
#define WM_DAC_MUTE     0x08
#define WM_DAC_CTRL2        0x09
#define WM_DAC_INT      0x0a
#define WM_ADC_INT      0x0b
#define WM_MASTER_CTRL      0x0c
#define WM_POWERDOWN        0x0d
#define WM_ADC_ATTEN_L      0x0e
#define WM_ADC_ATTEN_R      0x0f
#define WM_ALC_CTRL1        0x10
#define WM_ALC_CTRL2        0x11
#define WM_ALC_CTRL3        0x12
#define WM_NOISE_GATE       0x13
#define WM_LIMITER      0x14
#define WM_ADC_MUX      0x15
#define WM_OUT_MUX      0x16
#define WM_RESET        0x17

/*
 * GPIO
 */
#define PONTIS_CS_CS        (1<<4)  /* CS */
#define PONTIS_CS_CLK       (1<<5)  /* CLK */
#define PONTIS_CS_RDATA     (1<<6)  /* CS8416 -> VT1720 */
#define PONTIS_CS_WDATA     (1<<7)  /* VT1720 -> CS8416 */


/*
 * get the current register value of WM codec
 */
static unsigned short wm_get(struct snd_ice1712 *ice, int reg)
{
    reg <<= 1;
    return ((unsigned short)ice->akm[0].images[reg] << 8) |
        ice->akm[0].images[reg + 1];
}

/*
 * set the register value of WM codec and remember it
 */
static void wm_put_nocache(struct snd_ice1712 *ice, int reg, unsigned short val)
{
    unsigned short cval;
    cval = (reg << 9) | val;
    snd_vt1724_write_i2c(ice, WM_DEV, cval >> 8, cval & 0xff);
}

static void wm_put(struct snd_ice1712 *ice, int reg, unsigned short val)
{
    wm_put_nocache(ice, reg, val);
    reg <<= 1;
    ice->akm[0].images[reg] = val >> 8;
    ice->akm[0].images[reg + 1] = val;
}

/*
 * DAC volume attenuation mixer control (-64dB to 0dB)
 */

#define DAC_0dB 0xff
#define DAC_RES 128
#define DAC_MIN (DAC_0dB - DAC_RES)

static int wm_dac_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;   /* mute */
    uinfo->value.integer.max = DAC_RES; /* 0dB, 0.5dB step */
    return 0;
}

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

    mutex_lock(&ice->gpio_mutex);
    for (i = 0; i < 2; i++) {
        val = wm_get(ice, WM_DAC_ATTEN_L + i) & 0xff;
        val = val > DAC_MIN ? (val - DAC_MIN) : 0;
        ucontrol->value.integer.value[i] = val;
    }
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int wm_dac_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned short oval, nval;
    int i, idx, change = 0;

    mutex_lock(&ice->gpio_mutex);
    for (i = 0; i < 2; i++) {
        nval = ucontrol->value.integer.value[i];
        nval = (nval ? (nval + DAC_MIN) : 0) & 0xff;
        idx = WM_DAC_ATTEN_L + i;
        oval = wm_get(ice, idx) & 0xff;
        if (oval != nval) {
            wm_put(ice, idx, nval);
            wm_put_nocache(ice, idx, nval | 0x100);
            change = 1;
        }
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}

/*
 * ADC gain mixer control (-64dB to 0dB)
 */

#define ADC_0dB 0xcf
#define ADC_RES 128
#define ADC_MIN (ADC_0dB - ADC_RES)

static int wm_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;   /* mute (-64dB) */
    uinfo->value.integer.max = ADC_RES; /* 0dB, 0.5dB step */
    return 0;
}

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

    mutex_lock(&ice->gpio_mutex);
    for (i = 0; i < 2; i++) {
        val = wm_get(ice, WM_ADC_ATTEN_L + i) & 0xff;
        val = val > ADC_MIN ? (val - ADC_MIN) : 0;
        ucontrol->value.integer.value[i] = val;
    }
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int wm_adc_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned short ovol, nvol;
    int i, idx, change = 0;

    mutex_lock(&ice->gpio_mutex);
    for (i = 0; i < 2; i++) {
        nvol = ucontrol->value.integer.value[i];
        nvol = nvol ? (nvol + ADC_MIN) : 0;
        idx  = WM_ADC_ATTEN_L + i;
        ovol = wm_get(ice, idx) & 0xff;
        if (ovol != nvol) {
            wm_put(ice, idx, nvol);
            change = 1;
        }
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}

/*
 * ADC input mux mixer control
 */
#define wm_adc_mux_info     snd_ctl_boolean_mono_info

static int wm_adc_mux_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int bit = kcontrol->private_value;

    mutex_lock(&ice->gpio_mutex);
    ucontrol->value.integer.value[0] = (wm_get(ice, WM_ADC_MUX) & (1 << bit)) ? 1 : 0;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int wm_adc_mux_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    int bit = kcontrol->private_value;
    unsigned short oval, nval;
    int change;

    mutex_lock(&ice->gpio_mutex);
    nval = oval = wm_get(ice, WM_ADC_MUX);
    if (ucontrol->value.integer.value[0])
        nval |= (1 << bit);
    else
        nval &= ~(1 << bit);
    change = nval != oval;
    if (change) {
        wm_put(ice, WM_ADC_MUX, nval);
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}

/*
 * Analog bypass (In -> Out)
 */
#define wm_bypass_info      snd_ctl_boolean_mono_info

static int wm_bypass_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);

    mutex_lock(&ice->gpio_mutex);
    ucontrol->value.integer.value[0] = (wm_get(ice, WM_OUT_MUX) & 0x04) ? 1 : 0;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int wm_bypass_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned short val, oval;
    int change = 0;

    mutex_lock(&ice->gpio_mutex);
    val = oval = wm_get(ice, WM_OUT_MUX);
    if (ucontrol->value.integer.value[0])
        val |= 0x04;
    else
        val &= ~0x04;
    if (val != oval) {
        wm_put(ice, WM_OUT_MUX, val);
        change = 1;
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}

/*
 * Left/Right swap
 */
#define wm_chswap_info      snd_ctl_boolean_mono_info

static int wm_chswap_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);

    mutex_lock(&ice->gpio_mutex);
    ucontrol->value.integer.value[0] = (wm_get(ice, WM_DAC_CTRL1) & 0xf0) != 0x90;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int wm_chswap_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned short val, oval;
    int change = 0;

    mutex_lock(&ice->gpio_mutex);
    oval = wm_get(ice, WM_DAC_CTRL1);
    val = oval & 0x0f;
    if (ucontrol->value.integer.value[0])
        val |= 0x60;
    else
        val |= 0x90;
    if (val != oval) {
        wm_put(ice, WM_DAC_CTRL1, val);
        wm_put_nocache(ice, WM_DAC_CTRL1, val);
        change = 1;
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}

/*
 * write data in the SPI mode
 */
static void set_gpio_bit(struct snd_ice1712 *ice, unsigned int bit, int val)
{
    unsigned int tmp = snd_ice1712_gpio_read(ice);
    if (val)
        tmp |= bit;
    else
        tmp &= ~bit;
    snd_ice1712_gpio_write(ice, tmp);
}

static void spi_send_byte(struct snd_ice1712 *ice, unsigned char data)
{
    int i;
    for (i = 0; i < 8; i++) {
        set_gpio_bit(ice, PONTIS_CS_CLK, 0);
        udelay(1);
        set_gpio_bit(ice, PONTIS_CS_WDATA, data & 0x80);
        udelay(1);
        set_gpio_bit(ice, PONTIS_CS_CLK, 1);
        udelay(1);
        data <<= 1;
    }
}

static unsigned int spi_read_byte(struct snd_ice1712 *ice)
{
    int i;
    unsigned int val = 0;

    for (i = 0; i < 8; i++) {
        val <<= 1;
        set_gpio_bit(ice, PONTIS_CS_CLK, 0);
        udelay(1);
        if (snd_ice1712_gpio_read(ice) & PONTIS_CS_RDATA)
            val |= 1;
        udelay(1);
        set_gpio_bit(ice, PONTIS_CS_CLK, 1);
        udelay(1);
    }
    return val;
}


static void spi_write(struct snd_ice1712 *ice, unsigned int dev, unsigned int reg, unsigned int data)
{
    snd_ice1712_gpio_set_dir(ice, PONTIS_CS_CS|PONTIS_CS_WDATA|PONTIS_CS_CLK);
    snd_ice1712_gpio_set_mask(ice, ~(PONTIS_CS_CS|PONTIS_CS_WDATA|PONTIS_CS_CLK));
    set_gpio_bit(ice, PONTIS_CS_CS, 0);
    spi_send_byte(ice, dev & ~1); /* WRITE */
    spi_send_byte(ice, reg); /* MAP */
    spi_send_byte(ice, data); /* DATA */
    /* trigger */
    set_gpio_bit(ice, PONTIS_CS_CS, 1);
    udelay(1);
    /* restore */
    snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
    snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
}

static unsigned int spi_read(struct snd_ice1712 *ice, unsigned int dev, unsigned int reg)
{
    unsigned int val;
    snd_ice1712_gpio_set_dir(ice, PONTIS_CS_CS|PONTIS_CS_WDATA|PONTIS_CS_CLK);
    snd_ice1712_gpio_set_mask(ice, ~(PONTIS_CS_CS|PONTIS_CS_WDATA|PONTIS_CS_CLK));
    set_gpio_bit(ice, PONTIS_CS_CS, 0);
    spi_send_byte(ice, dev & ~1); /* WRITE */
    spi_send_byte(ice, reg); /* MAP */
    /* trigger */
    set_gpio_bit(ice, PONTIS_CS_CS, 1);
    udelay(1);
    set_gpio_bit(ice, PONTIS_CS_CS, 0);
    spi_send_byte(ice, dev | 1); /* READ */
    val = spi_read_byte(ice);
    /* trigger */
    set_gpio_bit(ice, PONTIS_CS_CS, 1);
    udelay(1);
    /* restore */
    snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
    snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
    return val;
}


/*
 * SPDIF input source
 */
static int cs_source_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
    static const char * const texts[] = {
        "Coax",     /* RXP0 */
        "Optical",  /* RXP1 */
        "CD",       /* RXP2 */
    };
    uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
    uinfo->count = 1;
    uinfo->value.enumerated.items = 3;
    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 cs_source_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);

    mutex_lock(&ice->gpio_mutex);
    ucontrol->value.enumerated.item[0] = ice->gpio.saved[0];
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int cs_source_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned char val;
    int change = 0;

    mutex_lock(&ice->gpio_mutex);
    if (ucontrol->value.enumerated.item[0] != ice->gpio.saved[0]) {
        ice->gpio.saved[0] = ucontrol->value.enumerated.item[0] & 3;
        val = 0x80 | (ice->gpio.saved[0] << 3);
        spi_write(ice, CS_DEV, 0x04, val);
        change = 1;
    }
    mutex_unlock(&ice->gpio_mutex);
    return change;
}


/*
 * GPIO controls
 */
static int pontis_gpio_mask_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;
    uinfo->value.integer.max = 0xffff; /* 16bit */
    return 0;
}

static int pontis_gpio_mask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    mutex_lock(&ice->gpio_mutex);
    /* 4-7 reserved */
    ucontrol->value.integer.value[0] = (~ice->gpio.write_mask & 0xffff) | 0x00f0;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}
    
static int pontis_gpio_mask_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned int val;
    int changed;
    mutex_lock(&ice->gpio_mutex);
    /* 4-7 reserved */
    val = (~ucontrol->value.integer.value[0] & 0xffff) | 0x00f0;
    changed = val != ice->gpio.write_mask;
    ice->gpio.write_mask = val;
    mutex_unlock(&ice->gpio_mutex);
    return changed;
}

static int pontis_gpio_dir_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    mutex_lock(&ice->gpio_mutex);
    /* 4-7 reserved */
    ucontrol->value.integer.value[0] = ice->gpio.direction & 0xff0f;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}
    
static int pontis_gpio_dir_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned int val;
    int changed;
    mutex_lock(&ice->gpio_mutex);
    /* 4-7 reserved */
    val = ucontrol->value.integer.value[0] & 0xff0f;
    changed = (val != ice->gpio.direction);
    ice->gpio.direction = val;
    mutex_unlock(&ice->gpio_mutex);
    return changed;
}

static int pontis_gpio_data_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    mutex_lock(&ice->gpio_mutex);
    snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
    snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
    ucontrol->value.integer.value[0] = snd_ice1712_gpio_read(ice) & 0xffff;
    mutex_unlock(&ice->gpio_mutex);
    return 0;
}

static int pontis_gpio_data_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
    struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
    unsigned int val, nval;
    int changed = 0;
    mutex_lock(&ice->gpio_mutex);
    snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
    snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
    val = snd_ice1712_gpio_read(ice) & 0xffff;
    nval = ucontrol->value.integer.value[0] & 0xffff;
    if (val != nval) {
        snd_ice1712_gpio_write(ice, nval);
        changed = 1;
    }
    mutex_unlock(&ice->gpio_mutex);
    return changed;
}

static const DECLARE_TLV_DB_SCALE(db_scale_volume, -6400, 50, 1);

/*
 * mixers
 */

static struct snd_kcontrol_new pontis_controls[] __devinitdata = {
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
               SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "PCM Playback Volume",
        .info = wm_dac_vol_info,
        .get = wm_dac_vol_get,
        .put = wm_dac_vol_put,
        .tlv = { .p = db_scale_volume },
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
               SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "Capture Volume",
        .info = wm_adc_vol_info,
        .get = wm_adc_vol_get,
        .put = wm_adc_vol_put,
        .tlv = { .p = db_scale_volume },
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "CD Capture Switch",
        .info = wm_adc_mux_info,
        .get = wm_adc_mux_get,
        .put = wm_adc_mux_put,
        .private_value = 0,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Line Capture Switch",
        .info = wm_adc_mux_info,
        .get = wm_adc_mux_get,
        .put = wm_adc_mux_put,
        .private_value = 1,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Analog Bypass Switch",
        .info = wm_bypass_info,
        .get = wm_bypass_get,
        .put = wm_bypass_put,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Swap Output Channels",
        .info = wm_chswap_info,
        .get = wm_chswap_get,
        .put = wm_chswap_put,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "IEC958 Input Source",
        .info = cs_source_info,
        .get = cs_source_get,
        .put = cs_source_put,
    },
    /* FIXME: which interface? */
    {
        .iface = SNDRV_CTL_ELEM_IFACE_CARD,
        .name = "GPIO Mask",
        .info = pontis_gpio_mask_info,
        .get = pontis_gpio_mask_get,
        .put = pontis_gpio_mask_put,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_CARD,
        .name = "GPIO Direction",
        .info = pontis_gpio_mask_info,
        .get = pontis_gpio_dir_get,
        .put = pontis_gpio_dir_put,
    },
    {
        .iface = SNDRV_CTL_ELEM_IFACE_CARD,
        .name = "GPIO Data",
        .info = pontis_gpio_mask_info,
        .get = pontis_gpio_data_get,
        .put = pontis_gpio_data_put,
    },
};


/*
 * WM codec registers
 */
static void wm_proc_regs_write(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
    struct snd_ice1712 *ice = entry->private_data;
    char line[64];
    unsigned int reg, val;
    mutex_lock(&ice->gpio_mutex);
    while (!snd_info_get_line(buffer, line, sizeof(line))) {
        if (sscanf(line, "%x %x", &reg, &val) != 2)
            continue;
        if (reg <= 0x17 && val <= 0xffff)
            wm_put(ice, reg, val);
    }
    mutex_unlock(&ice->gpio_mutex);
}

static void wm_proc_regs_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
    struct snd_ice1712 *ice = entry->private_data;
    int reg, val;

    mutex_lock(&ice->gpio_mutex);
    for (reg = 0; reg <= 0x17; reg++) {
        val = wm_get(ice, reg);
        snd_iprintf(buffer, "%02x = %04x\n", reg, val);
    }
    mutex_unlock(&ice->gpio_mutex);
}

static void wm_proc_init(struct snd_ice1712 *ice)
{
    struct snd_info_entry *entry;
    if (! snd_card_proc_new(ice->card, "wm_codec", &entry)) {
        snd_info_set_text_ops(entry, ice, wm_proc_regs_read);
        entry->mode |= S_IWUSR;
        entry->c.text.write = wm_proc_regs_write;
    }
}

static void cs_proc_regs_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
    struct snd_ice1712 *ice = entry->private_data;
    int reg, val;

    mutex_lock(&ice->gpio_mutex);
    for (reg = 0; reg <= 0x26; reg++) {
        val = spi_read(ice, CS_DEV, reg);
        snd_iprintf(buffer, "%02x = %02x\n", reg, val);
    }
    val = spi_read(ice, CS_DEV, 0x7f);
    snd_iprintf(buffer, "%02x = %02x\n", 0x7f, val);
    mutex_unlock(&ice->gpio_mutex);
}

static void cs_proc_init(struct snd_ice1712 *ice)
{
    struct snd_info_entry *entry;
    if (! snd_card_proc_new(ice->card, "cs_codec", &entry))
        snd_info_set_text_ops(entry, ice, cs_proc_regs_read);
}


static int __devinit pontis_add_controls(struct snd_ice1712 *ice)
{
    unsigned int i;
    int err;

    for (i = 0; i < ARRAY_SIZE(pontis_controls); i++) {
        err = snd_ctl_add(ice->card, snd_ctl_new1(&pontis_controls[i], ice));
        if (err < 0)
            return err;
    }

    wm_proc_init(ice);
    cs_proc_init(ice);

    return 0;
}


/*
 * initialize the chip
 */
static int __devinit pontis_init(struct snd_ice1712 *ice)
{
    static const unsigned short wm_inits[] = {
        /* These come first to reduce init pop noise */
        WM_ADC_MUX, 0x00c0, /* ADC mute */
        WM_DAC_MUTE,    0x0001, /* DAC softmute */
        WM_DAC_CTRL1,   0x0000, /* DAC mute */

        WM_POWERDOWN,   0x0008, /* All power-up except HP */
        WM_RESET,   0x0000, /* reset */
    };
    static const unsigned short wm_inits2[] = {
        WM_MASTER_CTRL, 0x0022, /* 256fs, slave mode */
        WM_DAC_INT, 0x0022, /* I2S, normal polarity, 24bit */
        WM_ADC_INT, 0x0022, /* I2S, normal polarity, 24bit */
        WM_DAC_CTRL1,   0x0090, /* DAC L/R */
        WM_OUT_MUX, 0x0001, /* OUT DAC */
        WM_HP_ATTEN_L,  0x0179, /* HP 0dB */
        WM_HP_ATTEN_R,  0x0179, /* HP 0dB */
        WM_DAC_ATTEN_L, 0x0000, /* DAC 0dB */
        WM_DAC_ATTEN_L, 0x0100, /* DAC 0dB */
        WM_DAC_ATTEN_R, 0x0000, /* DAC 0dB */
        WM_DAC_ATTEN_R, 0x0100, /* DAC 0dB */
        /* WM_DAC_MASTER,   0x0100, */  /* DAC master muted */
        WM_PHASE_SWAP,  0x0000, /* phase normal */
        WM_DAC_CTRL2,   0x0000, /* no deemphasis, no ZFLG */
        WM_ADC_ATTEN_L, 0x0000, /* ADC muted */
        WM_ADC_ATTEN_R, 0x0000, /* ADC muted */
#if 0
        WM_ALC_CTRL1,   0x007b, /* */
        WM_ALC_CTRL2,   0x0000, /* */
        WM_ALC_CTRL3,   0x0000, /* */
        WM_NOISE_GATE,  0x0000, /* */
#endif
        WM_DAC_MUTE,    0x0000, /* DAC unmute */
        WM_ADC_MUX, 0x0003, /* ADC unmute, both CD/Line On */
    };
    static const unsigned char cs_inits[] = {
        0x04,   0x80,   /* RUN, RXP0 */
        0x05,   0x05,   /* slave, 24bit */
        0x01,   0x00,
        0x02,   0x00,
        0x03,   0x00,
    };
    unsigned int i;

    ice->vt1720 = 1;
    ice->num_total_dacs = 2;
    ice->num_total_adcs = 2;

    /* to remember the register values */
    ice->akm = kzalloc(sizeof(struct snd_akm4xxx), GFP_KERNEL);
    if (! ice->akm)
        return -ENOMEM;
    ice->akm_codecs = 1;

    /* HACK - use this as the SPDIF source.
     * don't call snd_ice1712_gpio_get/put(), otherwise it's overwritten
     */
    ice->gpio.saved[0] = 0;

    /* initialize WM8776 codec */
    for (i = 0; i < ARRAY_SIZE(wm_inits); i += 2)
        wm_put(ice, wm_inits[i], wm_inits[i+1]);
    schedule_timeout_uninterruptible(1);
    for (i = 0; i < ARRAY_SIZE(wm_inits2); i += 2)
        wm_put(ice, wm_inits2[i], wm_inits2[i+1]);

    /* initialize CS8416 codec */
    /* assert PRST#; MT05 bit 7 */
    outb(inb(ICEMT1724(ice, AC97_CMD)) | 0x80, ICEMT1724(ice, AC97_CMD));
    mdelay(5);
    /* deassert PRST# */
    outb(inb(ICEMT1724(ice, AC97_CMD)) & ~0x80, ICEMT1724(ice, AC97_CMD));

    for (i = 0; i < ARRAY_SIZE(cs_inits); i += 2)
        spi_write(ice, CS_DEV, cs_inits[i], cs_inits[i+1]);

    return 0;
}


/*
 * Pontis boards don't provide the EEPROM data at all.
 * hence the driver needs to sets up it properly.
 */

static unsigned char pontis_eeprom[] __devinitdata = {
    [ICE_EEP2_SYSCONF]     = 0x08,  /* clock 256, mpu401, spdif-in/ADC, 1DAC */
    [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]    = 0x07,
    [ICE_EEP2_GPIO_DIR1]   = 0x00,
    [ICE_EEP2_GPIO_DIR2]   = 0x00,  /* ignored */
    [ICE_EEP2_GPIO_MASK]   = 0x0f,  /* 4-7 reserved for CS8416 */
    [ICE_EEP2_GPIO_MASK1]  = 0xff,
    [ICE_EEP2_GPIO_MASK2]  = 0x00,  /* ignored */
    [ICE_EEP2_GPIO_STATE]  = 0x06,  /* 0-low, 1-high, 2-high */
    [ICE_EEP2_GPIO_STATE1] = 0x00,
    [ICE_EEP2_GPIO_STATE2] = 0x00,  /* ignored */
};

/* entry point */
struct snd_ice1712_card_info snd_vt1720_pontis_cards[] __devinitdata = {
    {
        .subvendor = VT1720_SUBDEVICE_PONTIS_MS300,
        .name = "Pontis MS300",
        .model = "ms300",
        .chip_init = pontis_init,
        .build_controls = pontis_add_controls,
        .eeprom_size = sizeof(pontis_eeprom),
        .eeprom_data = pontis_eeprom,
    },
    { } /* terminator */
};