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prodigy_hifi.c

/*
 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
 *
 *   Lowlevel functions for Audiotrak Prodigy 7.1 Hifi
 *   based on pontis.c
 *
 *      Copyright (c) 2007 Julian Scheel <julian@jusst.de>
 *      Copyright (c) 2007 allank
 *      Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
 *
 *   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 "prodigy_hifi.h"

struct prodigy_hifi_spec {
      unsigned short master[2];
      unsigned short vol[8];
};

/* I2C addresses */
#define WM_DEV          0x34

/* 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

/* Analog Recording Source :- Mic, LineIn, CD/Video, */

/* implement capture source select control for WM8776 */

#define WM_AIN1 "AIN1"
#define WM_AIN2 "AIN2"
#define WM_AIN3 "AIN3"
#define WM_AIN4 "AIN4"
#define WM_AIN5 "AIN5"

/* GPIO pins of envy24ht connected to wm8766 */
#define WM8766_SPI_CLK   (1<<17) /* CLK, Pin97 on ICE1724 */
#define WM8766_SPI_MD     (1<<16) /* DATA VT1724 -> WM8766, Pin96 */
#define WM8766_SPI_ML     (1<<18) /* Latch, Pin98 */

/* WM8766 registers */
#define WM8766_DAC_CTRL  0x02   /* DAC Control */
#define WM8766_INT_CTRL  0x03   /* Interface Control */
#define WM8766_DAC_CTRL2      0x09
#define WM8766_DAC_CTRL3      0x0a
#define WM8766_RESET        0x1f
#define WM8766_LDA1          0x00
#define WM8766_LDA2          0x04
#define WM8766_LDA3          0x06
#define WM8766_RDA1          0x01
#define WM8766_RDA2          0x05
#define WM8766_RDA3          0x07
#define WM8766_MUTE1        0x0C
#define WM8766_MUTE2        0x0F


/*
 * Prodigy HD2
 */
#define AK4396_ADDR    0x00
#define AK4396_CSN    (1 << 8)    /* CSN->GPIO8, pin 75 */
#define AK4396_CCLK   (1 << 9)    /* CCLK->GPIO9, pin 76 */
#define AK4396_CDTI   (1 << 10)   /* CDTI->GPIO10, pin 77 */

/* ak4396 registers */
#define AK4396_CTRL1        0x00
#define AK4396_CTRL2        0x01
#define AK4396_CTRL3        0x02
#define AK4396_LCH_ATT    0x03
#define AK4396_RCH_ATT    0x04


/*
 * 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;
}

/*
 * 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);
}

/*
 * SPI implementation for WM8766 codec - only writing supported, no readback
 */

static void wm8766_spi_send_word(struct snd_ice1712 *ice, unsigned int data)
{
      int i;
      for (i = 0; i < 16; i++) {
            set_gpio_bit(ice, WM8766_SPI_CLK, 0);
            udelay(1);
            set_gpio_bit(ice, WM8766_SPI_MD, data & 0x8000);
            udelay(1);
            set_gpio_bit(ice, WM8766_SPI_CLK, 1);
            udelay(1);
            data <<= 1;
      }
}

static void wm8766_spi_write(struct snd_ice1712 *ice, unsigned int reg,
                       unsigned int data)
{
      unsigned int block;

      snd_ice1712_gpio_set_dir(ice, WM8766_SPI_MD|
                              WM8766_SPI_CLK|WM8766_SPI_ML);
      snd_ice1712_gpio_set_mask(ice, ~(WM8766_SPI_MD|
                              WM8766_SPI_CLK|WM8766_SPI_ML));
      /* latch must be low when writing */
      set_gpio_bit(ice, WM8766_SPI_ML, 0);
      block = (reg << 9) | (data & 0x1ff);
      wm8766_spi_send_word(ice, block); /* REGISTER ADDRESS */
      /* release latch */
      set_gpio_bit(ice, WM8766_SPI_ML, 1);
      udelay(1);
      /* restore */
      snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
      snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
}


/*
 * serial interface for ak4396 - only writing supported, no readback
 */

static void ak4396_send_word(struct snd_ice1712 *ice, unsigned int data)
{
      int i;
      for (i = 0; i < 16; i++) {
            set_gpio_bit(ice, AK4396_CCLK, 0);
            udelay(1);
            set_gpio_bit(ice, AK4396_CDTI, data & 0x8000);
            udelay(1);
            set_gpio_bit(ice, AK4396_CCLK, 1);
            udelay(1);
            data <<= 1;
      }
}

static void ak4396_write(struct snd_ice1712 *ice, unsigned int reg,
                   unsigned int data)
{
      unsigned int block;

      snd_ice1712_gpio_set_dir(ice, AK4396_CSN|AK4396_CCLK|AK4396_CDTI);
      snd_ice1712_gpio_set_mask(ice, ~(AK4396_CSN|AK4396_CCLK|AK4396_CDTI));
      /* latch must be low when writing */
      set_gpio_bit(ice, AK4396_CSN, 0); 
      block =  ((AK4396_ADDR & 0x03) << 14) | (1 << 13) |
                  ((reg & 0x1f) << 8) | (data & 0xff);
      ak4396_send_word(ice, block); /* REGISTER ADDRESS */
      /* release latch */
      set_gpio_bit(ice, AK4396_CSN, 1);
      udelay(1);
      /* restore */
      snd_ice1712_gpio_set_mask(ice, ice->gpio.write_mask);
      snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
}


/*
 * ak4396 mixers
 */



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

static int ak4396_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 = 0xFF; /* linear */
      return 0;
}

static int ak4396_dac_vol_get(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i;
      
      for (i = 0; i < 2; i++)
            ucontrol->value.integer.value[i] = spec->vol[i];

      return 0;
}

static int ak4396_dac_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i;
      int change = 0;
      
      mutex_lock(&ice->gpio_mutex);
      for (i = 0; i < 2; i++) {
            if (ucontrol->value.integer.value[i] != spec->vol[i]) {
                  spec->vol[i] = ucontrol->value.integer.value[i];
                  ak4396_write(ice, AK4396_LCH_ATT + i,
                             spec->vol[i] & 0xff);
                  change = 1;
            }
      }
      mutex_unlock(&ice->gpio_mutex);
      return change;
}

static const DECLARE_TLV_DB_SCALE(db_scale_wm_dac, -12700, 100, 1);

static struct snd_kcontrol_new prodigy_hd2_controls[] __devinitdata = {
    {
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
            SNDRV_CTL_ELEM_ACCESS_TLV_READ),
      .name = "Front Playback Volume",
      .info = ak4396_dac_vol_info,
      .get = ak4396_dac_vol_get,
      .put = ak4396_dac_vol_put,
      .tlv = { .p = db_scale_wm_dac },
    },
};


/* --------------- */

/*
 * Logarithmic volume values for WM87*6
 * Computed as 20 * Log10(255 / x)
 */
static const unsigned char wm_vol[256] = {
      127, 48, 42, 39, 36, 34, 33, 31, 30, 29, 28, 27, 27, 26, 25, 25, 24, 24, 23,
      23, 22, 22, 21, 21, 21, 20, 20, 20, 19, 19, 19, 18, 18, 18, 18, 17, 17, 17,
      17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13,
      13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11,
      11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8,
      8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6,
      6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
      5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3,
      3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
      2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
      1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
      0, 0
};

#define WM_VOL_MAX      (sizeof(wm_vol) - 1)
#define WM_VOL_MUTE     0x8000


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


static void wm_set_vol(struct snd_ice1712 *ice, unsigned int index,
                   unsigned short vol, unsigned short master)
{
      unsigned char nvol;
      
      if ((master & WM_VOL_MUTE) || (vol & WM_VOL_MUTE))
            nvol = 0;
      else {
            nvol = (((vol & ~WM_VOL_MUTE) * (master & ~WM_VOL_MUTE)) / 128)
                        & WM_VOL_MAX;
            nvol = (nvol ? (nvol + DAC_MIN) : 0) & 0xff;
      }
      
      wm_put(ice, index, nvol);
      wm_put_nocache(ice, index, 0x100 | nvol);
}

static void wm8766_set_vol(struct snd_ice1712 *ice, unsigned int index,
                     unsigned short vol, unsigned short master)
{
      unsigned char nvol;
      
      if ((master & WM_VOL_MUTE) || (vol & WM_VOL_MUTE))
            nvol = 0;
      else {
            nvol = (((vol & ~WM_VOL_MUTE) * (master & ~WM_VOL_MUTE)) / 128)
                        & WM_VOL_MAX;
            nvol = (nvol ? (nvol + DAC_MIN) : 0) & 0xff;
      }

      wm8766_spi_write(ice, index, (0x0100 | nvol));
}


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

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);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i;

      for (i = 0; i < 2; i++)
            ucontrol->value.integer.value[i] =
                  spec->vol[2 + i] & ~WM_VOL_MUTE;
      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);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i, idx, change = 0;

      mutex_lock(&ice->gpio_mutex);
      for (i = 0; i < 2; i++) {
            if (ucontrol->value.integer.value[i] != spec->vol[2 + i]) {
                  idx = WM_DAC_ATTEN_L + i;
                  spec->vol[2 + i] &= WM_VOL_MUTE;
                  spec->vol[2 + i] |= ucontrol->value.integer.value[i];
                  wm_set_vol(ice, idx, spec->vol[2 + i], spec->master[i]);
                  change = 1;
            }
      }
      mutex_unlock(&ice->gpio_mutex);
      return change;
}


/*
 * WM8766 DAC volume attenuation mixer control
 */
static int wm8766_vol_info(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_info *uinfo)
{
      int voices = kcontrol->private_value >> 8;
      uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = voices;
      uinfo->value.integer.min = 0;       /* mute */
      uinfo->value.integer.max = DAC_RES; /* 0dB */
      return 0;
}

static int wm8766_vol_get(struct snd_kcontrol *kcontrol,
                    struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i, ofs, voices;

      voices = kcontrol->private_value >> 8;
      ofs = kcontrol->private_value & 0xff;
      for (i = 0; i < voices; i++)
            ucontrol->value.integer.value[i] = spec->vol[ofs + i];
      return 0;
}

static int wm8766_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i, idx, ofs, voices;
      int change = 0;

      voices = kcontrol->private_value >> 8;
      ofs = kcontrol->private_value & 0xff;
      mutex_lock(&ice->gpio_mutex);
      for (i = 0; i < voices; i++) {
            if (ucontrol->value.integer.value[i] != spec->vol[ofs + i]) {
                  idx = WM8766_LDA1 + ofs + i;
                  spec->vol[ofs + i] &= WM_VOL_MUTE;
                  spec->vol[ofs + i] |= ucontrol->value.integer.value[i];
                  wm8766_set_vol(ice, idx,
                               spec->vol[ofs + i], spec->master[i]);
                  change = 1;
            }
      }
      mutex_unlock(&ice->gpio_mutex);
      return change;
}

/*
 * Master volume attenuation mixer control / applied to WM8776+WM8766
 */
static int wm_master_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;
      uinfo->value.integer.max = DAC_RES;
      return 0;
}

static int wm_master_vol_get(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int i;
      for (i = 0; i < 2; i++)
            ucontrol->value.integer.value[i] = spec->master[i];
      return 0;
}

static int wm_master_vol_put(struct snd_kcontrol *kcontrol,
                       struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
      struct prodigy_hifi_spec *spec = ice->spec;
      int ch, change = 0;

      mutex_lock(&ice->gpio_mutex);
      for (ch = 0; ch < 2; ch++) {
            if (ucontrol->value.integer.value[ch] != spec->master[ch]) {
                  spec->master[ch] = ucontrol->value.integer.value[ch];

                  /* Apply to front DAC */
                  wm_set_vol(ice, WM_DAC_ATTEN_L + ch,
                           spec->vol[2 + ch], spec->master[ch]);

                  wm8766_set_vol(ice, WM8766_LDA1 + ch,
                               spec->vol[0 + ch], spec->master[ch]);

                  wm8766_set_vol(ice, WM8766_LDA2 + ch,
                               spec->vol[4 + ch], spec->master[ch]);

                  wm8766_set_vol(ice, WM8766_LDA3 + ch,
                               spec->vol[6 + ch], spec->master[ch]);
                  change = 1;
            }
      }
      mutex_unlock(&ice->gpio_mutex);     
      return change;
}


/* KONSTI */

static int wm_adc_mux_enum_info(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_info *uinfo)
{
      static char* texts[32] = {
            "NULL", WM_AIN1, WM_AIN2, WM_AIN1 "+" WM_AIN2,
            WM_AIN3, WM_AIN1 "+" WM_AIN3, WM_AIN2 "+" WM_AIN3,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN3,
            WM_AIN4, WM_AIN1 "+" WM_AIN4, WM_AIN2 "+" WM_AIN4,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN4,
            WM_AIN3 "+" WM_AIN4, WM_AIN1 "+" WM_AIN3 "+" WM_AIN4,
            WM_AIN2 "+" WM_AIN3 "+" WM_AIN4,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN3 "+" WM_AIN4,
            WM_AIN5, WM_AIN1 "+" WM_AIN5, WM_AIN2 "+" WM_AIN5,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN5,
            WM_AIN3 "+" WM_AIN5, WM_AIN1 "+" WM_AIN3 "+" WM_AIN5,
            WM_AIN2 "+" WM_AIN3 "+" WM_AIN5,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN3 "+" WM_AIN5,
            WM_AIN4 "+" WM_AIN5, WM_AIN1 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN2 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN3 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN1 "+" WM_AIN3 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN2 "+" WM_AIN3 "+" WM_AIN4 "+" WM_AIN5,
            WM_AIN1 "+" WM_AIN2 "+" WM_AIN3 "+" WM_AIN4 "+" WM_AIN5
      };

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 1;
      uinfo->value.enumerated.items = 32;
      if (uinfo->value.enumerated.item > 31)
            uinfo->value.enumerated.item = 31;
      strcpy(uinfo->value.enumerated.name,
             texts[uinfo->value.enumerated.item]);
      return 0;
}

static int wm_adc_mux_enum_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_ADC_MUX) & 0x1f;
      mutex_unlock(&ice->gpio_mutex);
      return 0;
}

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

      mutex_lock(&ice->gpio_mutex);
      oval = wm_get(ice, WM_ADC_MUX);
      nval = (oval & 0xe0) | ucontrol->value.integer.value[0];
      if (nval != oval) {
            wm_put(ice, WM_ADC_MUX, nval);
            change = 1;
      }
      mutex_unlock(&ice->gpio_mutex);
      return change;
}

/* KONSTI */

/*
 * 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 0;
}

/*
 * 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;
}


/*
 * mixers
 */

static struct snd_kcontrol_new prodigy_hifi_controls[] __devinitdata = {
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "Master Playback Volume",
            .info = wm_master_vol_info,
            .get = wm_master_vol_get,
            .put = wm_master_vol_put,
            .tlv = { .p = db_scale_wm_dac }
      },
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "Front Playback Volume",
            .info = wm_dac_vol_info,
            .get = wm_dac_vol_get,
            .put = wm_dac_vol_put,
            .tlv = { .p = db_scale_wm_dac },
      },
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "Rear Playback Volume",
            .info = wm8766_vol_info,
            .get = wm8766_vol_get,
            .put = wm8766_vol_put,
            .private_value = (2 << 8) | 0,
            .tlv = { .p = db_scale_wm_dac },
      },
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "Center Playback Volume",
            .info = wm8766_vol_info,
            .get = wm8766_vol_get,
            .put = wm8766_vol_put,
            .private_value = (1 << 8) | 4,
            .tlv = { .p = db_scale_wm_dac }
      },
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "LFE Playback Volume",
            .info = wm8766_vol_info,
            .get = wm8766_vol_get,
            .put = wm8766_vol_put,
            .private_value = (1 << 8) | 5,
            .tlv = { .p = db_scale_wm_dac }
      },
      {
            .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
            .access = (SNDRV_CTL_ELEM_ACCESS_READWRITE |
                     SNDRV_CTL_ELEM_ACCESS_TLV_READ),
            .name = "Side Playback Volume",
            .info = wm8766_vol_info,
            .get = wm8766_vol_get,
            .put = wm8766_vol_put,
            .private_value = (2 << 8) | 6,
            .tlv = { .p = db_scale_wm_dac },
      },
      {
            .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_wm_dac },
      },
      {
            .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 = "Analog Capture Source",
            .info = wm_adc_mux_enum_info,
            .get = wm_adc_mux_enum_get,
            .put = wm_adc_mux_enum_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 int __devinit prodigy_hifi_add_controls(struct snd_ice1712 *ice)
{
      unsigned int i;
      int err;

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

      wm_proc_init(ice);

      return 0;
}

static int __devinit prodigy_hd2_add_controls(struct snd_ice1712 *ice)
{
      unsigned int i;
      int err;

      for (i = 0; i < ARRAY_SIZE(prodigy_hd2_controls); i++) {
            err = snd_ctl_add(ice->card,
                          snd_ctl_new1(&prodigy_hd2_controls[i], ice));
            if (err < 0)
                  return err;
      }

      wm_proc_init(ice);

      return 0;
}


/*
 * initialize the chip
 */
static int __devinit prodigy_hifi_init(struct snd_ice1712 *ice)
{
      static unsigned short wm_inits[] = {
            /* These come first to reduce init pop noise */
            WM_ADC_MUX, 0x0003,     /* ADC mute */
            /* 0x00c0 replaced by 0x0003 */
            
            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 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_PHASE_SWAP,    0x0000,     /* phase normal */
#if 0
            WM_DAC_MASTER,    0x0100,     /* DAC master muted */
#endif
            WM_DAC_CTRL2,     0x0000,     /* no deemphasis, no ZFLG */
            WM_ADC_ATTEN_L,   0x0000,     /* ADC muted */
            WM_ADC_ATTEN_R,   0x0000,     /* ADC muted */
#if 1
            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 unsigned short wm8766_inits[] = {
            WM8766_RESET,        0x0000,
            WM8766_DAC_CTRL,  0x0120,
            WM8766_INT_CTRL,  0x0022, /* I2S Normal Mode, 24 bit */
            WM8766_DAC_CTRL2,       0x0001,
            WM8766_DAC_CTRL3,       0x0080,
            WM8766_LDA1,          0x0100,
            WM8766_LDA2,          0x0100,
            WM8766_LDA3,          0x0100,
            WM8766_RDA1,          0x0100,
            WM8766_RDA2,          0x0100,
            WM8766_RDA3,          0x0100,
            WM8766_MUTE1,        0x0000,
            WM8766_MUTE2,        0x0000,
      };

      struct prodigy_hifi_spec *spec;
      unsigned int i;

      ice->vt1720 = 0;
      ice->vt1724 = 1;

      ice->num_total_dacs = 8;
      ice->num_total_adcs = 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;
      /* to remeber the register values */

      ice->akm = kzalloc(sizeof(struct snd_akm4xxx), GFP_KERNEL);
      if (! ice->akm)
            return -ENOMEM;
      ice->akm_codecs = 1;

      spec = kzalloc(sizeof(*spec), GFP_KERNEL);
      if (!spec)
            return -ENOMEM;
      ice->spec = spec;

      /* 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 WM8766 codec */
      for (i = 0; i < ARRAY_SIZE(wm8766_inits); i += 2)
            wm8766_spi_write(ice, wm8766_inits[i], wm8766_inits[i+1]);


      return 0;
}


/*
 * initialize the chip
 */
static int __devinit prodigy_hd2_init(struct snd_ice1712 *ice)
{
      static unsigned short ak4396_inits[] = {
            AK4396_CTRL1,        0x87,   /* I2S Normal Mode, 24 bit */
            AK4396_CTRL2,        0x02,
            AK4396_CTRL3,        0x00, 
            AK4396_LCH_ATT,    0x00,
            AK4396_RCH_ATT,    0x00,
      };

      struct prodigy_hifi_spec *spec;
      unsigned int i;

      ice->vt1720 = 0;
      ice->vt1724 = 1;

      ice->num_total_dacs = 1;
      ice->num_total_adcs = 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;
      /* to remeber the register values */

      ice->akm = kzalloc(sizeof(struct snd_akm4xxx), GFP_KERNEL);
      if (! ice->akm)
            return -ENOMEM;
      ice->akm_codecs = 1;

      spec = kzalloc(sizeof(*spec), GFP_KERNEL);
      if (!spec)
            return -ENOMEM;
      ice->spec = spec;

      /* initialize ak4396 codec */
      /* reset codec */
      ak4396_write(ice, AK4396_CTRL1, 0x86);
      msleep(100);
      ak4396_write(ice, AK4396_CTRL1, 0x87);
                  
      for (i = 0; i < ARRAY_SIZE(ak4396_inits); i += 2)
            ak4396_write(ice, ak4396_inits[i], ak4396_inits[i+1]);

      return 0;
}


static unsigned char prodigy71hifi_eeprom[] __devinitdata = {
      0x4b,   /* SYSCONF: clock 512, spdif-in/ADC, 4DACs */
      0x80,   /* ACLINK: I2S */
      0xfc,   /* I2S: vol, 96k, 24bit, 192k */
      0xc3,   /* SPDIF: out-en, out-int, spdif-in */
      0xff,   /* GPIO_DIR */
      0xff,   /* GPIO_DIR1 */
      0x5f,   /* GPIO_DIR2 */
      0x00,   /* GPIO_MASK */
      0x00,   /* GPIO_MASK1 */
      0x00,   /* GPIO_MASK2 */
      0x00,   /* GPIO_STATE */
      0x00,   /* GPIO_STATE1 */
      0x00,   /* GPIO_STATE2 */
};

static unsigned char prodigyhd2_eeprom[] __devinitdata = {
      0x4b,   /* SYSCONF: clock 512, spdif-in/ADC, 4DACs */
      0x80,   /* ACLINK: I2S */
      0xfc,   /* I2S: vol, 96k, 24bit, 192k */
      0xc3,   /* SPDIF: out-en, out-int, spdif-in */
      0xff,   /* GPIO_DIR */
      0xff,   /* GPIO_DIR1 */
      0x5f,   /* GPIO_DIR2 */
      0x00,   /* GPIO_MASK */
      0x00,   /* GPIO_MASK1 */
      0x00,   /* GPIO_MASK2 */
      0x00,   /* GPIO_STATE */
      0x00,   /* GPIO_STATE1 */
      0x00,   /* GPIO_STATE2 */
};

static unsigned char fortissimo4_eeprom[] __devinitdata = {
      0x43,   /* SYSCONF: clock 512, ADC, 4DACs */    
      0x80,   /* ACLINK: I2S */
      0xfc,   /* I2S: vol, 96k, 24bit, 192k */
      0xc1,   /* SPDIF: out-en, out-int */
      0xff,   /* GPIO_DIR */
      0xff,   /* GPIO_DIR1 */
      0x5f,   /* GPIO_DIR2 */
      0x00,   /* GPIO_MASK */
      0x00,   /* GPIO_MASK1 */
      0x00,   /* GPIO_MASK2 */
      0x00,   /* GPIO_STATE */
      0x00,   /* GPIO_STATE1 */
      0x00,   /* GPIO_STATE2 */
};

/* entry point */
struct snd_ice1712_card_info snd_vt1724_prodigy_hifi_cards[] __devinitdata = {
      {
            .subvendor = VT1724_SUBDEVICE_PRODIGY_HIFI,
            .name = "Audiotrak Prodigy 7.1 HiFi",
            .model = "prodigy71hifi",
            .chip_init = prodigy_hifi_init,
            .build_controls = prodigy_hifi_add_controls,
            .eeprom_size = sizeof(prodigy71hifi_eeprom),
            .eeprom_data = prodigy71hifi_eeprom,
            .driver = "Prodigy71HIFI",
      },
      {
      .subvendor = VT1724_SUBDEVICE_PRODIGY_HD2,
      .name = "Audiotrak Prodigy HD2",
      .model = "prodigyhd2",
      .chip_init = prodigy_hd2_init,
      .build_controls = prodigy_hd2_add_controls,
      .eeprom_size = sizeof(prodigyhd2_eeprom),
      .eeprom_data = prodigyhd2_eeprom,
      .driver = "Prodigy71HD2",
      },
      {
            .subvendor = VT1724_SUBDEVICE_FORTISSIMO4,
            .name = "Hercules Fortissimo IV",
            .model = "fortissimo4",
            .chip_init = prodigy_hifi_init,
            .build_controls = prodigy_hifi_add_controls,
            .eeprom_size = sizeof(fortissimo4_eeprom),
            .eeprom_data = fortissimo4_eeprom,
            .driver = "Fortissimo4",
      },
      { } /* terminator */
};


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