phase.c

/*
 *   ALSA driver for ICEnsemble ICE1724 (Envy24)
 *
 *   Lowlevel functions for Terratec PHASE 22
 *
 *	Copyright (c) 2005 Misha Zhilin <misha@epiphan.com>
 *
 *   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
 *
 */

/* PHASE 22 overview:
 *   Audio controller: VIA Envy24HT-S (slightly trimmed down version of Envy24HT)
 *   Analog chip: AK4524 (partially via Philip's 74HCT125)
 *   Digital receiver: CS8414-CS (not supported in this release)
 *
 *   Envy connects to AK4524
 *	- CS directly from GPIO 10
 *	- CCLK via 74HCT125's gate #4 from GPIO 4
 *	- CDTI via 74HCT125's gate #2 from GPIO 5
 *		CDTI may be completely blocked by 74HCT125's gate #1 controlled by GPIO 3
 */

#include <sound/driver.h>
#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 "ice1712.h"
#include "envy24ht.h"
#include "phase.h"

/* WM8770 registers */
#define WM_DAC_ATTEN		0x00	/* DAC1-8 analog attenuation */
#define WM_DAC_MASTER_ATTEN	0x08	/* DAC master analog attenuation */
#define WM_DAC_DIG_ATTEN	0x09	/* DAC1-8 digital attenuation */
#define WM_DAC_DIG_MASTER_ATTEN	0x11	/* DAC master digital attenuation */
#define WM_PHASE_SWAP		0x12	/* DAC phase */
#define WM_DAC_CTRL1		0x13	/* DAC control bits */
#define WM_MUTE			0x14	/* mute controls */
#define WM_DAC_CTRL2		0x15	/* de-emphasis and zefo-flag */
#define WM_INT_CTRL		0x16	/* interface control */
#define WM_MASTER		0x17	/* master clock and mode */
#define WM_POWERDOWN		0x18	/* power-down controls */
#define WM_ADC_GAIN		0x19	/* ADC gain L(19)/R(1a) */
#define WM_ADC_MUX		0x1b	/* input MUX */
#define WM_OUT_MUX1		0x1c	/* output MUX */
#define WM_OUT_MUX2		0x1e	/* output MUX */
#define WM_RESET		0x1f	/* software reset */


/*
 * Logarithmic volume values for WM8770
 * Computed as 20 * Log10(255 / x)
 */
static 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

static struct snd_akm4xxx akm_phase22 __devinitdata = {
	.type = SND_AK4524,
	.num_dacs = 2,
	.num_adcs = 2,
};

static struct snd_ak4xxx_private akm_phase22_priv __devinitdata = {
	.caddr =	2,
	.cif =		1,
	.data_mask =	1 << 4,
	.clk_mask =	1 << 5,
	.cs_mask =	1 << 10,
	.cs_addr =	1 << 10,
	.cs_none =	0,
	.add_flags = 	1 << 3,
	.mask_flags =	0,
};

static int __devinit phase22_init(struct snd_ice1712 *ice)
{
	struct snd_akm4xxx *ak;
	int err;

	// Configure DAC/ADC description for generic part of ice1724
	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_PHASE22:
		ice->num_total_dacs = 2;
		ice->num_total_adcs = 2;
		ice->vt1720 = 1; // Envy24HT-S have 16 bit wide GPIO
		break;
	default:
		snd_BUG();
		return -EINVAL;
	}

	// Initialize analog chips
	ak = ice->akm = kzalloc(sizeof(struct snd_akm4xxx), GFP_KERNEL);
	if (! ak)
		return -ENOMEM;
	ice->akm_codecs = 1;
	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_PHASE22:
		if ((err = snd_ice1712_akm4xxx_init(ak, &akm_phase22, &akm_phase22_priv, ice)) < 0)
			return err;
		break;
	}

	return 0;
}

static int __devinit phase22_add_controls(struct snd_ice1712 *ice)
{
	int err = 0;

	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_PHASE22:
		err = snd_ice1712_akm4xxx_build_controls(ice);
		if (err < 0)
			return err;
	}
	return 0;
}

static unsigned char phase22_eeprom[] __devinitdata = {
	0x00,	/* SYSCONF: 1xADC, 1xDACs */
	0x80,	/* ACLINK: I2S */
	0xf8,	/* I2S: vol, 96k, 24bit*/
	0xc3,	/* SPDIF: out-en, out-int, spdif-in */
	0xFF,	/* GPIO_DIR */
	0xFF,	/* GPIO_DIR1 */
	0xFF,	/* GPIO_DIR2 */
	0x00,	/* GPIO_MASK */
	0x00,	/* GPIO_MASK1 */
	0x00,	/* GPIO_MASK2 */
	0x00,	/* GPIO_STATE: */
	0x00,	/* GPIO_STATE1: */
	0x00,	/* GPIO_STATE2 */
};

static unsigned char phase28_eeprom[] __devinitdata = {
	0x0b,	/* 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 */
};

/*
 * write data in the SPI mode
 */
static void phase28_spi_write(struct snd_ice1712 *ice, unsigned int cs, unsigned int data, int bits)
{
	unsigned int tmp;
	int i;

	tmp = snd_ice1712_gpio_read(ice);

	snd_ice1712_gpio_set_mask(ice, ~(PHASE28_WM_RW|PHASE28_SPI_MOSI|PHASE28_SPI_CLK|
					 PHASE28_WM_CS));
	tmp |= PHASE28_WM_RW;
	tmp &= ~cs;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);

	for (i = bits - 1; i >= 0; i--) {
		tmp &= ~PHASE28_SPI_CLK;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
		if (data & (1 << i))
			tmp |= PHASE28_SPI_MOSI;
		else
			tmp &= ~PHASE28_SPI_MOSI;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
		tmp |= PHASE28_SPI_CLK;
		snd_ice1712_gpio_write(ice, tmp);
		udelay(1);
	}

	tmp &= ~PHASE28_SPI_CLK;
	tmp |= cs;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
	tmp |= PHASE28_SPI_CLK;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
}

/*
 * 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
 */
static void wm_put_nocache(struct snd_ice1712 *ice, int reg, unsigned short val)
{
	phase28_spi_write(ice, PHASE28_WM_CS, (reg << 9) | (val & 0x1ff), 16);
}

/*
 * set the register value of WM codec and remember it
 */
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;
}

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 = 127 - wm_vol[(((vol & ~WM_VOL_MUTE) * (master & ~WM_VOL_MUTE)) / 127) & WM_VOL_MAX];

	wm_put(ice, index, nvol);
	wm_put_nocache(ice, index, 0x180 | nvol);
}

/*
 * DAC mute control
 */
#define wm_pcm_mute_info	phase28_mono_bool_info

static int wm_pcm_mute_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_MUTE) & 0x10) ? 0 : 1;
	mutex_unlock(&ice->gpio_mutex);
	return 0;
}

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

	snd_ice1712_save_gpio_status(ice);
	oval = wm_get(ice, WM_MUTE);
	nval = (oval & ~0x10) | (ucontrol->value.integer.value[0] ? 0 : 0x10);
	if ((change = (nval != oval)))
		wm_put(ice, WM_MUTE, nval);
	snd_ice1712_restore_gpio_status(ice);

	return change;
}

/*
 * Master volume attenuation mixer control
 */
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 = WM_VOL_MAX;
	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);
	int i;
	for (i=0; i<2; i++)
		ucontrol->value.integer.value[i] = ice->spec.phase28.master[i] & ~WM_VOL_MUTE;
	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);
	int ch, change = 0;

	snd_ice1712_save_gpio_status(ice);
	for (ch = 0; ch < 2; ch++) {
		if (ucontrol->value.integer.value[ch] != ice->spec.phase28.master[ch]) {
			int dac;
			ice->spec.phase28.master[ch] &= WM_VOL_MUTE;
			ice->spec.phase28.master[ch] |= ucontrol->value.integer.value[ch];
			for (dac = 0; dac < ice->num_total_dacs; dac += 2)
				wm_set_vol(ice, WM_DAC_ATTEN + dac + ch,
					   ice->spec.phase28.vol[dac + ch],
					   ice->spec.phase28.master[ch]);
			change = 1;
		}
	}
	snd_ice1712_restore_gpio_status(ice);
	return change;
}

static int __devinit phase28_init(struct snd_ice1712 *ice)
{
	static unsigned short wm_inits_phase28[] = {
		/* These come first to reduce init pop noise */
		0x1b, 0x044,		/* ADC Mux (AC'97 source) */
		0x1c, 0x00B,		/* Out Mux1 (VOUT1 = DAC+AUX, VOUT2 = DAC) */
		0x1d, 0x009,		/* Out Mux2 (VOUT2 = DAC, VOUT3 = DAC) */

		0x18, 0x000,		/* All power-up */

		0x16, 0x122,		/* I2S, normal polarity, 24bit */
		0x17, 0x022,		/* 256fs, slave mode */
		0x00, 0,		/* DAC1 analog mute */
		0x01, 0,		/* DAC2 analog mute */
		0x02, 0,		/* DAC3 analog mute */
		0x03, 0,		/* DAC4 analog mute */
		0x04, 0,		/* DAC5 analog mute */
		0x05, 0,		/* DAC6 analog mute */
		0x06, 0,		/* DAC7 analog mute */
		0x07, 0,		/* DAC8 analog mute */
		0x08, 0x100,		/* master analog mute */
		0x09, 0xff,		/* DAC1 digital full */
		0x0a, 0xff,		/* DAC2 digital full */
		0x0b, 0xff,		/* DAC3 digital full */
		0x0c, 0xff,		/* DAC4 digital full */
		0x0d, 0xff,		/* DAC5 digital full */
		0x0e, 0xff,		/* DAC6 digital full */
		0x0f, 0xff,		/* DAC7 digital full */
		0x10, 0xff,		/* DAC8 digital full */
		0x11, 0x1ff,		/* master digital full */
		0x12, 0x000,		/* phase normal */
		0x13, 0x090,		/* unmute DAC L/R */
		0x14, 0x000,		/* all unmute */
		0x15, 0x000,		/* no deemphasis, no ZFLG */
		0x19, 0x000,		/* -12dB ADC/L */
		0x1a, 0x000,		/* -12dB ADC/R */
		(unsigned short)-1
	};

	unsigned int tmp;
	struct snd_akm4xxx *ak;
	unsigned short *p;
	int i;

	ice->num_total_dacs = 8;
	ice->num_total_adcs = 2;

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

	snd_ice1712_gpio_set_dir(ice, 0x5fffff); /* fix this for the time being */

	/* reset the wm codec as the SPI mode */
	snd_ice1712_save_gpio_status(ice);
	snd_ice1712_gpio_set_mask(ice, ~(PHASE28_WM_RESET|PHASE28_WM_CS|PHASE28_HP_SEL));

	tmp = snd_ice1712_gpio_read(ice);
	tmp &= ~PHASE28_WM_RESET;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
	tmp |= PHASE28_WM_CS;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
	tmp |= PHASE28_WM_RESET;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);

	p = wm_inits_phase28;
	for (; *p != (unsigned short)-1; p += 2)
		wm_put(ice, p[0], p[1]);

	snd_ice1712_restore_gpio_status(ice);

	ice->spec.phase28.master[0] = WM_VOL_MUTE;
	ice->spec.phase28.master[1] = WM_VOL_MUTE;
	for (i = 0; i < ice->num_total_dacs; i++) {
		ice->spec.phase28.vol[i] = WM_VOL_MUTE;
		wm_set_vol(ice, i, ice->spec.phase28.vol[i], ice->spec.phase28.master[i % 2]);
	}

	return 0;
}

/*
 * DAC volume attenuation mixer control
 */
static int wm_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 (-101dB) */
	uinfo->value.integer.max = 0x7F;	/* 0dB */
	return 0;
}

static int wm_vol_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	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] = ice->spec.phase28.vol[ofs+i] & ~WM_VOL_MUTE;
	return 0;
}

static int wm_vol_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int i, idx, ofs, voices;
	int change = 0;

	voices = kcontrol->private_value >> 8;
	ofs = kcontrol->private_value & 0xff;
	snd_ice1712_save_gpio_status(ice);
	for (i = 0; i < voices; i++) {
		idx  = WM_DAC_ATTEN + ofs + i;
		if (ucontrol->value.integer.value[i] != ice->spec.phase28.vol[ofs+i]) {
			ice->spec.phase28.vol[ofs+i] &= WM_VOL_MUTE;
			ice->spec.phase28.vol[ofs+i] |= ucontrol->value.integer.value[i];
			wm_set_vol(ice, idx, ice->spec.phase28.vol[ofs+i],
				   ice->spec.phase28.master[i]);
			change = 1;
		}
	}
	snd_ice1712_restore_gpio_status(ice);
	return change;
}

/*
 * WM8770 mute control
 */
static int wm_mute_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) {
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = kcontrol->private_value >> 8;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int wm_mute_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int voices, ofs, i;

	voices = kcontrol->private_value >> 8;
	ofs = kcontrol->private_value & 0xFF;

	for (i = 0; i < voices; i++)
		ucontrol->value.integer.value[i] = (ice->spec.phase28.vol[ofs+i] & WM_VOL_MUTE) ? 0 : 1;
	return 0;
}

static int wm_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int change = 0, voices, ofs, i;

	voices = kcontrol->private_value >> 8;
	ofs = kcontrol->private_value & 0xFF;

	snd_ice1712_save_gpio_status(ice);
	for (i = 0; i < voices; i++) {
		int val = (ice->spec.phase28.vol[ofs + i] & WM_VOL_MUTE) ? 0 : 1;
		if (ucontrol->value.integer.value[i] != val) {
			ice->spec.phase28.vol[ofs + i] &= ~WM_VOL_MUTE;
			ice->spec.phase28.vol[ofs + i] |=
				ucontrol->value.integer.value[i] ? 0 : WM_VOL_MUTE;
			wm_set_vol(ice, ofs + i, ice->spec.phase28.vol[ofs + i],
				   ice->spec.phase28.master[i]);
			change = 1;
		}
	}
	snd_ice1712_restore_gpio_status(ice);

	return change;
}

/*
 * WM8770 master mute control
 */
static int wm_master_mute_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) {
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

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

	ucontrol->value.integer.value[0] = (ice->spec.phase28.master[0] & WM_VOL_MUTE) ? 0 : 1;
	ucontrol->value.integer.value[1] = (ice->spec.phase28.master[1] & WM_VOL_MUTE) ? 0 : 1;
	return 0;
}

static int wm_master_mute_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int change = 0, i;

	snd_ice1712_save_gpio_status(ice);
	for (i = 0; i < 2; i++) {
		int val = (ice->spec.phase28.master[i] & WM_VOL_MUTE) ? 0 : 1;
		if (ucontrol->value.integer.value[i] != val) {
			int dac;
			ice->spec.phase28.master[i] &= ~WM_VOL_MUTE;
			ice->spec.phase28.master[i] |=
				ucontrol->value.integer.value[i] ? 0 : WM_VOL_MUTE;
			for (dac = 0; dac < ice->num_total_dacs; dac += 2)
				wm_set_vol(ice, WM_DAC_ATTEN + dac + i,
					   ice->spec.phase28.vol[dac + i],
					   ice->spec.phase28.master[i]);
			change = 1;
		}
	}
	snd_ice1712_restore_gpio_status(ice);

	return change;
}

/* digital master volume */
#define PCM_0dB 0xff
#define PCM_RES 128	/* -64dB */
#define PCM_MIN (PCM_0dB - PCM_RES)
static int wm_pcm_vol_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;		/* mute (-64dB) */
	uinfo->value.integer.max = PCM_RES;	/* 0dB */
	return 0;
}

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

	mutex_lock(&ice->gpio_mutex);
	val = wm_get(ice, WM_DAC_DIG_MASTER_ATTEN) & 0xff;
	val = val > PCM_MIN ? (val - PCM_MIN) : 0;
	ucontrol->value.integer.value[0] = val;
	mutex_unlock(&ice->gpio_mutex);
	return 0;
}

static int wm_pcm_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 change = 0;

	snd_ice1712_save_gpio_status(ice);
	nvol = ucontrol->value.integer.value[0];
	nvol = (nvol ? (nvol + PCM_MIN) : 0) & 0xff;
	ovol = wm_get(ice, WM_DAC_DIG_MASTER_ATTEN) & 0xff;
	if (ovol != nvol) {
		wm_put(ice, WM_DAC_DIG_MASTER_ATTEN, nvol); /* prelatch */
		wm_put_nocache(ice, WM_DAC_DIG_MASTER_ATTEN, nvol | 0x100); /* update */
		change = 1;
	}
	snd_ice1712_restore_gpio_status(ice);
	return change;
}

/*
 */
static int phase28_mono_bool_info(struct snd_kcontrol *k, struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

/*
 * Deemphasis
 */
#define phase28_deemp_info	phase28_mono_bool_info

static int phase28_deemp_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = (wm_get(ice, WM_DAC_CTRL2) & 0xf) == 0xf;
	return 0;
}

static int phase28_deemp_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int temp, temp2;
	temp2 = temp = wm_get(ice, WM_DAC_CTRL2);
	if (ucontrol->value.integer.value[0])
		temp |= 0xf;
	else
		temp &= ~0xf;
	if (temp != temp2) {
		wm_put(ice, WM_DAC_CTRL2, temp);
		return 1;
	}
	return 0;
}

/*
 * ADC Oversampling
 */
static int phase28_oversampling_info(struct snd_kcontrol *k, struct snd_ctl_elem_info *uinfo)
{
	static char *texts[2] = { "128x", "64x"	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 2;

	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 phase28_oversampling_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	ucontrol->value.enumerated.item[0] = (wm_get(ice, WM_MASTER) & 0x8) == 0x8;
	return 0;
}

static int phase28_oversampling_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	int temp, temp2;
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);

	temp2 = temp = wm_get(ice, WM_MASTER);

	if (ucontrol->value.enumerated.item[0])
		temp |= 0x8;
	else
		temp &= ~0x8;

	if (temp != temp2) {
		wm_put(ice, WM_MASTER, temp);
		return 1;
	}
	return 0;
}

static struct snd_kcontrol_new phase28_dac_controls[] __devinitdata = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Master Playback Switch",
		.info = wm_master_mute_info,
		.get = wm_master_mute_get,
		.put = wm_master_mute_put
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Master Playback Volume",
		.info = wm_master_vol_info,
		.get = wm_master_vol_get,
		.put = wm_master_vol_put
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Front Playback Switch",
		.info = wm_mute_info,
		.get = wm_mute_get,
		.put = wm_mute_put,
		.private_value = (2 << 8) | 0
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Front Playback Volume",
		.info = wm_vol_info,
		.get = wm_vol_get,
		.put = wm_vol_put,
		.private_value = (2 << 8) | 0
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Rear Playback Switch",
		.info = wm_mute_info,
		.get = wm_mute_get,
		.put = wm_mute_put,
		.private_value = (2 << 8) | 2
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Rear Playback Volume",
		.info = wm_vol_info,
		.get = wm_vol_get,
		.put = wm_vol_put,
		.private_value = (2 << 8) | 2
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Center Playback Switch",
		.info = wm_mute_info,
		.get = wm_mute_get,
		.put = wm_mute_put,
		.private_value = (1 << 8) | 4
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Center Playback Volume",
		.info = wm_vol_info,
		.get = wm_vol_get,
		.put = wm_vol_put,
		.private_value = (1 << 8) | 4
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "LFE Playback Switch",
		.info = wm_mute_info,
		.get = wm_mute_get,
		.put = wm_mute_put,
		.private_value = (1 << 8) | 5
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "LFE Playback Volume",
		.info = wm_vol_info,
		.get = wm_vol_get,
		.put = wm_vol_put,
		.private_value = (1 << 8) | 5
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Side Playback Switch",
		.info = wm_mute_info,
		.get = wm_mute_get,
		.put = wm_mute_put,
		.private_value = (2 << 8) | 6
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Side Playback Volume",
		.info = wm_vol_info,
		.get = wm_vol_get,
		.put = wm_vol_put,
		.private_value = (2 << 8) | 6
	}
};

static struct snd_kcontrol_new wm_controls[] __devinitdata = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "PCM Playback Switch",
		.info = wm_pcm_mute_info,
		.get = wm_pcm_mute_get,
		.put = wm_pcm_mute_put
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "PCM Playback Volume",
		.info = wm_pcm_vol_info,
		.get = wm_pcm_vol_get,
		.put = wm_pcm_vol_put
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "DAC Deemphasis Switch",
		.info = phase28_deemp_info,
		.get = phase28_deemp_get,
		.put = phase28_deemp_put
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "ADC Oversampling",
		.info = phase28_oversampling_info,
		.get = phase28_oversampling_get,
		.put = phase28_oversampling_put
	}
};

static int __devinit phase28_add_controls(struct snd_ice1712 *ice)
{
	unsigned int i, counts;
	int err;

	counts = ARRAY_SIZE(phase28_dac_controls);
	for (i = 0; i < counts; i++) {
		err = snd_ctl_add(ice->card, snd_ctl_new1(&phase28_dac_controls[i], ice));
		if (err < 0)
			return err;
	}

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

	return 0;
}

struct snd_ice1712_card_info snd_vt1724_phase_cards[] __devinitdata = {
	{
		.subvendor = VT1724_SUBDEVICE_PHASE22,
		.name = "Terratec PHASE 22",
		.model = "phase22",
		.chip_init = phase22_init,
		.build_controls = phase22_add_controls,
		.eeprom_size = sizeof(phase22_eeprom),
		.eeprom_data = phase22_eeprom,
	},
	{
		.subvendor = VT1724_SUBDEVICE_PHASE28,
		.name = "Terratec PHASE 28",
		.model = "phase28",
		.chip_init = phase28_init,
		.build_controls = phase28_add_controls,
		.eeprom_size = sizeof(phase28_eeprom),
		.eeprom_data = phase28_eeprom,
	},
	{ } /* terminator */
};