/*
   *   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 = 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
  ", 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
  ", reg, val);
  	}
  	val = spi_read(ice, CS_DEV, 0x7f);
  	snd_iprintf(buffer, "%02x = %02x
  ", 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 */
  };