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pontis.c

/*
 *   ALSA driver for ICEnsemble VT1724 (Envy24HT)
 *
 *   Lowlevel functions for Pontis MS300
 *
 *    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 "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 = (struct snd_ice1712 *)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 = (struct snd_ice1712 *)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 = (struct snd_ice1712 *)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 remeber 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 */
};

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