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path: root/sound/pci/ice1712/ews.c
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/*
 *   ALSA driver for ICEnsemble ICE1712 (Envy24)
 *
 *   Lowlevel functions for Terratec EWS88MT/D, EWX24/96, DMX 6Fire
 *
 *	Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
 *                    2002 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 <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/cs8427.h>
#include <sound/asoundef.h>

#include "ice1712.h"
#include "ews.h"

#define SND_CS8404
#include <sound/cs8403.h>

enum {
	EWS_I2C_CS8404 = 0, EWS_I2C_PCF1, EWS_I2C_PCF2,
	EWS_I2C_88D = 0,
	EWS_I2C_6FIRE = 0
};
	

/* additional i2c devices for EWS boards */
struct ews_spec {
	struct snd_i2c_device *i2cdevs[3];
};

/*
 * access via i2c mode (for EWX 24/96, EWS 88MT&D)
 */

/* send SDA and SCL */
static void ewx_i2c_setlines(struct snd_i2c_bus *bus, int clk, int data)
{
	struct snd_ice1712 *ice = bus->private_data;
	unsigned char tmp = 0;
	if (clk)
		tmp |= ICE1712_EWX2496_SERIAL_CLOCK;
	if (data)
		tmp |= ICE1712_EWX2496_SERIAL_DATA;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, tmp);
	udelay(5);
}

static int ewx_i2c_getclock(struct snd_i2c_bus *bus)
{
	struct snd_ice1712 *ice = bus->private_data;
	return snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA) & ICE1712_EWX2496_SERIAL_CLOCK ? 1 : 0;
}

static int ewx_i2c_getdata(struct snd_i2c_bus *bus, int ack)
{
	struct snd_ice1712 *ice = bus->private_data;
	int bit;
	/* set RW pin to low */
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~ICE1712_EWX2496_RW);
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, 0);
	if (ack)
		udelay(5);
	bit = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA) & ICE1712_EWX2496_SERIAL_DATA ? 1 : 0;
	/* set RW pin to high */
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, ICE1712_EWX2496_RW);
	/* reset write mask */
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~ICE1712_EWX2496_SERIAL_CLOCK);
	return bit;
}

static void ewx_i2c_start(struct snd_i2c_bus *bus)
{
	struct snd_ice1712 *ice = bus->private_data;
	unsigned char mask;

	snd_ice1712_save_gpio_status(ice);
	/* set RW high */
	mask = ICE1712_EWX2496_RW;
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWX2496:
		mask |= ICE1712_EWX2496_AK4524_CS; /* CS high also */
		break;
	case ICE1712_SUBDEVICE_DMX6FIRE:
		mask |= ICE1712_6FIRE_AK4524_CS_MASK; /* CS high also */
		break;
	}
	snd_ice1712_gpio_write_bits(ice, mask, mask);
}

static void ewx_i2c_stop(struct snd_i2c_bus *bus)
{
	struct snd_ice1712 *ice = bus->private_data;
	snd_ice1712_restore_gpio_status(ice);
}

static void ewx_i2c_direction(struct snd_i2c_bus *bus, int clock, int data)
{
	struct snd_ice1712 *ice = bus->private_data;
	unsigned char mask = 0;

	if (clock)
		mask |= ICE1712_EWX2496_SERIAL_CLOCK; /* write SCL */
	if (data)
		mask |= ICE1712_EWX2496_SERIAL_DATA; /* write SDA */
	ice->gpio.direction &= ~(ICE1712_EWX2496_SERIAL_CLOCK|ICE1712_EWX2496_SERIAL_DATA);
	ice->gpio.direction |= mask;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DIRECTION, ice->gpio.direction);
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~mask);
}

static struct snd_i2c_bit_ops snd_ice1712_ewx_cs8427_bit_ops = {
	.start = ewx_i2c_start,
	.stop = ewx_i2c_stop,
	.direction = ewx_i2c_direction,
	.setlines = ewx_i2c_setlines,
	.getclock = ewx_i2c_getclock,
	.getdata = ewx_i2c_getdata,
};


/*
 * AK4524 access
 */

/* AK4524 chip select; address 0x48 bit 0-3 */
static int snd_ice1712_ews88mt_chip_select(struct snd_ice1712 *ice, int chip_mask)
{
	struct ews_spec *spec = ice->spec;
	unsigned char data, ndata;

	if (snd_BUG_ON(chip_mask < 0 || chip_mask > 0x0f))
		return -EINVAL;
	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_PCF2], &data, 1) != 1)
		goto __error;
	ndata = (data & 0xf0) | chip_mask;
	if (ndata != data)
		if (snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_PCF2], &ndata, 1)
		    != 1)
			goto __error;
	snd_i2c_unlock(ice->i2c);
	return 0;

     __error:
	snd_i2c_unlock(ice->i2c);
	dev_err(ice->card->dev,
		"AK4524 chip select failed, check cable to the front module\n");
	return -EIO;
}

/* start callback for EWS88MT, needs to select a certain chip mask */
static void ews88mt_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ice1712 *ice = ak->private_data[0];
	unsigned char tmp;
	/* assert AK4524 CS */
	if (snd_ice1712_ews88mt_chip_select(ice, ~(1 << chip) & 0x0f) < 0)
		dev_err(ice->card->dev, "fatal error (ews88mt chip select)\n");
	snd_ice1712_save_gpio_status(ice);
	tmp = ICE1712_EWS88_SERIAL_DATA |
		ICE1712_EWS88_SERIAL_CLOCK |
		ICE1712_EWS88_RW;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DIRECTION,
			  ice->gpio.direction | tmp);
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~tmp);
}

/* stop callback for EWS88MT, needs to deselect chip mask */
static void ews88mt_ak4524_unlock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ice1712 *ice = ak->private_data[0];
	snd_ice1712_restore_gpio_status(ice);
	udelay(1);
	snd_ice1712_ews88mt_chip_select(ice, 0x0f);
}

/* start callback for EWX24/96 */
static void ewx2496_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ice1712 *ice = ak->private_data[0];
	unsigned char tmp;
	snd_ice1712_save_gpio_status(ice);
	tmp =  ICE1712_EWX2496_SERIAL_DATA |
		ICE1712_EWX2496_SERIAL_CLOCK |
		ICE1712_EWX2496_AK4524_CS |
		ICE1712_EWX2496_RW;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DIRECTION,
			  ice->gpio.direction | tmp);
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~tmp);
}

/* start callback for DMX 6fire */
static void dmx6fire_ak4524_lock(struct snd_akm4xxx *ak, int chip)
{
	struct snd_ak4xxx_private *priv = (void *)ak->private_value[0];
	struct snd_ice1712 *ice = ak->private_data[0];
	unsigned char tmp;
	snd_ice1712_save_gpio_status(ice);
	tmp = priv->cs_mask = priv->cs_addr = (1 << chip) & ICE1712_6FIRE_AK4524_CS_MASK;
	tmp |= ICE1712_6FIRE_SERIAL_DATA |
		ICE1712_6FIRE_SERIAL_CLOCK |
		ICE1712_6FIRE_RW;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DIRECTION,
			  ice->gpio.direction | tmp);
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_WRITE_MASK, ~tmp);
}

/*
 * CS8404 interface on EWS88MT/D
 */

static void snd_ice1712_ews_cs8404_spdif_write(struct snd_ice1712 *ice, unsigned char bits)
{
	struct ews_spec *spec = ice->spec;
	unsigned char bytes[2];

	snd_i2c_lock(ice->i2c);
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
		if (snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_CS8404], &bits, 1)
		    != 1)
			goto _error;
		break;
	case ICE1712_SUBDEVICE_EWS88D:
		if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_88D], bytes, 2)
		    != 2)
			goto _error;
		if (bits != bytes[1]) {
			bytes[1] = bits;
			if (snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_88D],
					      bytes, 2) != 2)
				goto _error;
		}
		break;
	}
 _error:
	snd_i2c_unlock(ice->i2c);
}

/*
 */

static void ews88_spdif_default_get(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
	snd_cs8404_decode_spdif_bits(&ucontrol->value.iec958, ice->spdif.cs8403_bits);
}

static int ews88_spdif_default_put(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	int change;

	val = snd_cs8404_encode_spdif_bits(&ucontrol->value.iec958);
	spin_lock_irq(&ice->reg_lock);
	change = ice->spdif.cs8403_bits != val;
	ice->spdif.cs8403_bits = val;
	if (change && ice->playback_pro_substream == NULL) {
		spin_unlock_irq(&ice->reg_lock);
		snd_ice1712_ews_cs8404_spdif_write(ice, val);
	} else {
		spin_unlock_irq(&ice->reg_lock);
	}
	return change;
}

static void ews88_spdif_stream_get(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
	snd_cs8404_decode_spdif_bits(&ucontrol->value.iec958, ice->spdif.cs8403_stream_bits);
}

static int ews88_spdif_stream_put(struct snd_ice1712 *ice, struct snd_ctl_elem_value *ucontrol)
{
	unsigned int val;
	int change;

	val = snd_cs8404_encode_spdif_bits(&ucontrol->value.iec958);
	spin_lock_irq(&ice->reg_lock);
	change = ice->spdif.cs8403_stream_bits != val;
	ice->spdif.cs8403_stream_bits = val;
	if (change && ice->playback_pro_substream != NULL) {
		spin_unlock_irq(&ice->reg_lock);
		snd_ice1712_ews_cs8404_spdif_write(ice, val);
	} else {
		spin_unlock_irq(&ice->reg_lock);
	}
	return change;
}


/* open callback */
static void ews88_open_spdif(struct snd_ice1712 *ice, struct snd_pcm_substream *substream)
{
	ice->spdif.cs8403_stream_bits = ice->spdif.cs8403_bits;
}

/* set up SPDIF for EWS88MT / EWS88D */
static void ews88_setup_spdif(struct snd_ice1712 *ice, int rate)
{
	unsigned long flags;
	unsigned char tmp;
	int change;

	spin_lock_irqsave(&ice->reg_lock, flags);
	tmp = ice->spdif.cs8403_stream_bits;
	if (tmp & 0x10)		/* consumer */
		tmp &= (tmp & 0x01) ? ~0x06 : ~0x60;
	switch (rate) {
	case 32000: tmp |= (tmp & 0x01) ? 0x02 : 0x00; break;
	case 44100: tmp |= (tmp & 0x01) ? 0x06 : 0x40; break;
	case 48000: tmp |= (tmp & 0x01) ? 0x04 : 0x20; break;
	default: tmp |= (tmp & 0x01) ? 0x06 : 0x40; break;
	}
	change = ice->spdif.cs8403_stream_bits != tmp;
	ice->spdif.cs8403_stream_bits = tmp;
	spin_unlock_irqrestore(&ice->reg_lock, flags);
	if (change)
		snd_ctl_notify(ice->card, SNDRV_CTL_EVENT_MASK_VALUE, &ice->spdif.stream_ctl->id);
	snd_ice1712_ews_cs8404_spdif_write(ice, tmp);
}


/*
 */
static struct snd_akm4xxx akm_ews88mt = {
	.num_adcs = 8,
	.num_dacs = 8,
	.type = SND_AK4524,
	.ops = {
		.lock = ews88mt_ak4524_lock,
		.unlock = ews88mt_ak4524_unlock
	}
};

static const struct snd_ak4xxx_private akm_ews88mt_priv = {
	.caddr = 2,
	.cif = 1, /* CIF high */
	.data_mask = ICE1712_EWS88_SERIAL_DATA,
	.clk_mask = ICE1712_EWS88_SERIAL_CLOCK,
	.cs_mask = 0,
	.cs_addr = 0,
	.cs_none = 0, /* no chip select on gpio */
	.add_flags = ICE1712_EWS88_RW, /* set rw bit high */
	.mask_flags = 0,
};

static struct snd_akm4xxx akm_ewx2496 = {
	.num_adcs = 2,
	.num_dacs = 2,
	.type = SND_AK4524,
	.ops = {
		.lock = ewx2496_ak4524_lock
	}
};

static const struct snd_ak4xxx_private akm_ewx2496_priv = {
	.caddr = 2,
	.cif = 1, /* CIF high */
	.data_mask = ICE1712_EWS88_SERIAL_DATA,
	.clk_mask = ICE1712_EWS88_SERIAL_CLOCK,
	.cs_mask = ICE1712_EWX2496_AK4524_CS,
	.cs_addr = ICE1712_EWX2496_AK4524_CS,
	.cs_none = 0,
	.add_flags = ICE1712_EWS88_RW, /* set rw bit high */
	.mask_flags = 0,
};

static struct snd_akm4xxx akm_6fire = {
	.num_adcs = 6,
	.num_dacs = 6,
	.type = SND_AK4524,
	.ops = {
		.lock = dmx6fire_ak4524_lock
	}
};

static const struct snd_ak4xxx_private akm_6fire_priv = {
	.caddr = 2,
	.cif = 1, /* CIF high */
	.data_mask = ICE1712_6FIRE_SERIAL_DATA,
	.clk_mask = ICE1712_6FIRE_SERIAL_CLOCK,
	.cs_mask = 0,
	.cs_addr = 0, /* set later */
	.cs_none = 0,
	.add_flags = ICE1712_6FIRE_RW, /* set rw bit high */
	.mask_flags = 0,
};

/*
 * initialize the chip
 */

/* 6fire specific */
#define PCF9554_REG_INPUT      0
#define PCF9554_REG_OUTPUT     1
#define PCF9554_REG_POLARITY   2
#define PCF9554_REG_CONFIG     3

static int snd_ice1712_6fire_write_pca(struct snd_ice1712 *ice, unsigned char reg, unsigned char data);

static int snd_ice1712_ews_init(struct snd_ice1712 *ice)
{
	int err;
	struct snd_akm4xxx *ak;
	struct ews_spec *spec;

	/* set the analog DACs */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWX2496:
		ice->num_total_dacs = 2;
		ice->num_total_adcs = 2;
		break;	
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
		ice->num_total_dacs = 8;
		ice->num_total_adcs = 8;
		break;
	case ICE1712_SUBDEVICE_EWS88D:
		/* Note: not analog but ADAT I/O */
		ice->num_total_dacs = 8;
		ice->num_total_adcs = 8;
		break;
	case ICE1712_SUBDEVICE_DMX6FIRE:
		ice->num_total_dacs = 6;
		ice->num_total_adcs = 6;
		break;
	}

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

	/* create i2c */
	if ((err = snd_i2c_bus_create(ice->card, "ICE1712 GPIO 1", NULL, &ice->i2c)) < 0) {
		dev_err(ice->card->dev, "unable to create I2C bus\n");
		return err;
	}
	ice->i2c->private_data = ice;
	ice->i2c->hw_ops.bit = &snd_ice1712_ewx_cs8427_bit_ops;

	/* create i2c devices */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_DMX6FIRE:
		err = snd_i2c_device_create(ice->i2c, "PCF9554",
					    ICE1712_6FIRE_PCF9554_ADDR,
					    &spec->i2cdevs[EWS_I2C_6FIRE]);
		if (err < 0) {
			dev_err(ice->card->dev,
				"PCF9554 initialization failed\n");
			return err;
		}
		snd_ice1712_6fire_write_pca(ice, PCF9554_REG_CONFIG, 0x80);
		break;
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:

		err = snd_i2c_device_create(ice->i2c, "CS8404",
					    ICE1712_EWS88MT_CS8404_ADDR,
					    &spec->i2cdevs[EWS_I2C_CS8404]);
		if (err < 0)
			return err;
		err = snd_i2c_device_create(ice->i2c, "PCF8574 (1st)",
					    ICE1712_EWS88MT_INPUT_ADDR,
					    &spec->i2cdevs[EWS_I2C_PCF1]);
		if (err < 0)
			return err;
		err = snd_i2c_device_create(ice->i2c, "PCF8574 (2nd)",
					    ICE1712_EWS88MT_OUTPUT_ADDR,
					    &spec->i2cdevs[EWS_I2C_PCF2]);
		if (err < 0)
			return err;
		/* Check if the front module is connected */
		if ((err = snd_ice1712_ews88mt_chip_select(ice, 0x0f)) < 0)
			return err;
		break;
	case ICE1712_SUBDEVICE_EWS88D:
		err = snd_i2c_device_create(ice->i2c, "PCF8575",
					    ICE1712_EWS88D_PCF_ADDR,
					    &spec->i2cdevs[EWS_I2C_88D]);
		if (err < 0)
			return err;
		break;
	}

	/* set up SPDIF interface */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWX2496:
		if ((err = snd_ice1712_init_cs8427(ice, CS8427_BASE_ADDR)) < 0)
			return err;
		snd_cs8427_reg_write(ice->cs8427, CS8427_REG_RECVERRMASK, CS8427_UNLOCK | CS8427_CONF | CS8427_BIP | CS8427_PAR);
		break;
	case ICE1712_SUBDEVICE_DMX6FIRE:
		if ((err = snd_ice1712_init_cs8427(ice, ICE1712_6FIRE_CS8427_ADDR)) < 0)
			return err;
		snd_cs8427_reg_write(ice->cs8427, CS8427_REG_RECVERRMASK, CS8427_UNLOCK | CS8427_CONF | CS8427_BIP | CS8427_PAR);
		break;
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
	case ICE1712_SUBDEVICE_EWS88D:
		/* set up CS8404 */
		ice->spdif.ops.open = ews88_open_spdif;
		ice->spdif.ops.setup_rate = ews88_setup_spdif;
		ice->spdif.ops.default_get = ews88_spdif_default_get;
		ice->spdif.ops.default_put = ews88_spdif_default_put;
		ice->spdif.ops.stream_get = ews88_spdif_stream_get;
		ice->spdif.ops.stream_put = ews88_spdif_stream_put;
		/* Set spdif defaults */
		snd_ice1712_ews_cs8404_spdif_write(ice, ice->spdif.cs8403_bits);
		break;
	}

	/* no analog? */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWS88D:
		return 0;
	}

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

	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
		err = snd_ice1712_akm4xxx_init(ak, &akm_ews88mt, &akm_ews88mt_priv, ice);
		break;
	case ICE1712_SUBDEVICE_EWX2496:
		err = snd_ice1712_akm4xxx_init(ak, &akm_ewx2496, &akm_ewx2496_priv, ice);
		break;
	case ICE1712_SUBDEVICE_DMX6FIRE:
		err = snd_ice1712_akm4xxx_init(ak, &akm_6fire, &akm_6fire_priv, ice);
		break;
	default:
		err = 0;
	}

	return err;
}

/*
 * EWX 24/96 specific controls
 */

/* i/o sensitivity - this callback is shared among other devices, too */
static int snd_ice1712_ewx_io_sense_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo){

	static const char * const texts[2] = {
		"+4dBu", "-10dBV",
	};
	return snd_ctl_enum_info(uinfo, 1, 2, texts);
}

static int snd_ice1712_ewx_io_sense_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	unsigned char mask = kcontrol->private_value & 0xff;
	
	snd_ice1712_save_gpio_status(ice);
	ucontrol->value.enumerated.item[0] = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA) & mask ? 1 : 0;
	snd_ice1712_restore_gpio_status(ice);
	return 0;
}

static int snd_ice1712_ewx_io_sense_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	unsigned char mask = kcontrol->private_value & 0xff;
	int val, nval;

	if (kcontrol->private_value & (1 << 31))
		return -EPERM;
	nval = ucontrol->value.enumerated.item[0] ? mask : 0;
	snd_ice1712_save_gpio_status(ice);
	val = snd_ice1712_read(ice, ICE1712_IREG_GPIO_DATA);
	nval |= val & ~mask;
	snd_ice1712_write(ice, ICE1712_IREG_GPIO_DATA, nval);
	snd_ice1712_restore_gpio_status(ice);
	return val != nval;
}

static struct snd_kcontrol_new snd_ice1712_ewx2496_controls[] = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Input Sensitivity Switch",
		.info = snd_ice1712_ewx_io_sense_info,
		.get = snd_ice1712_ewx_io_sense_get,
		.put = snd_ice1712_ewx_io_sense_put,
		.private_value = ICE1712_EWX2496_AIN_SEL,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Output Sensitivity Switch",
		.info = snd_ice1712_ewx_io_sense_info,
		.get = snd_ice1712_ewx_io_sense_get,
		.put = snd_ice1712_ewx_io_sense_put,
		.private_value = ICE1712_EWX2496_AOUT_SEL,
	},
};


/*
 * EWS88MT specific controls
 */
/* analog output sensitivity;; address 0x48 bit 6 */
static int snd_ice1712_ews88mt_output_sense_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	unsigned char data;

	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_PCF2], &data, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	ucontrol->value.enumerated.item[0] = data & ICE1712_EWS88MT_OUTPUT_SENSE ? 1 : 0; /* high = -10dBV, low = +4dBu */
	return 0;
}

/* analog output sensitivity;; address 0x48 bit 6 */
static int snd_ice1712_ews88mt_output_sense_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	unsigned char data, ndata;

	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_PCF2], &data, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	ndata = (data & ~ICE1712_EWS88MT_OUTPUT_SENSE) | (ucontrol->value.enumerated.item[0] ? ICE1712_EWS88MT_OUTPUT_SENSE : 0);
	if (ndata != data && snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_PCF2],
					       &ndata, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	return ndata != data;
}

/* analog input sensitivity; address 0x46 */
static int snd_ice1712_ews88mt_input_sense_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	int channel = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
	unsigned char data;

	if (snd_BUG_ON(channel < 0 || channel > 7))
		return 0;
	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_PCF1], &data, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	/* reversed; high = +4dBu, low = -10dBV */
	ucontrol->value.enumerated.item[0] = data & (1 << channel) ? 0 : 1;
	snd_i2c_unlock(ice->i2c);
	return 0;
}

/* analog output sensitivity; address 0x46 */
static int snd_ice1712_ews88mt_input_sense_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	int channel = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
	unsigned char data, ndata;

	if (snd_BUG_ON(channel < 0 || channel > 7))
		return 0;
	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_PCF1], &data, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	ndata = (data & ~(1 << channel)) | (ucontrol->value.enumerated.item[0] ? 0 : (1 << channel));
	if (ndata != data && snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_PCF1],
					       &ndata, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	return ndata != data;
}

static const struct snd_kcontrol_new snd_ice1712_ews88mt_input_sense = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Input Sensitivity Switch",
	.info = snd_ice1712_ewx_io_sense_info,
	.get = snd_ice1712_ews88mt_input_sense_get,
	.put = snd_ice1712_ews88mt_input_sense_put,
	.count = 8,
};

static const struct snd_kcontrol_new snd_ice1712_ews88mt_output_sense = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Output Sensitivity Switch",
	.info = snd_ice1712_ewx_io_sense_info,
	.get = snd_ice1712_ews88mt_output_sense_get,
	.put = snd_ice1712_ews88mt_output_sense_put,
};


/*
 * EWS88D specific controls
 */

#define snd_ice1712_ews88d_control_info		snd_ctl_boolean_mono_info

static int snd_ice1712_ews88d_control_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	int shift = kcontrol->private_value & 0xff;
	int invert = (kcontrol->private_value >> 8) & 1;
	unsigned char data[2];
	
	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_88D], data, 2) != 2) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	data[0] = (data[shift >> 3] >> (shift & 7)) & 0x01;
	if (invert)
		data[0] ^= 0x01;
	ucontrol->value.integer.value[0] = data[0];
	return 0;
}

static int snd_ice1712_ews88d_control_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	struct ews_spec *spec = ice->spec;
	int shift = kcontrol->private_value & 0xff;
	int invert = (kcontrol->private_value >> 8) & 1;
	unsigned char data[2], ndata[2];
	int change;

	snd_i2c_lock(ice->i2c);
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_88D], data, 2) != 2) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	ndata[shift >> 3] = data[shift >> 3] & ~(1 << (shift & 7));
	if (invert) {
		if (! ucontrol->value.integer.value[0])
			ndata[shift >> 3] |= (1 << (shift & 7));
	} else {
		if (ucontrol->value.integer.value[0])
			ndata[shift >> 3] |= (1 << (shift & 7));
	}
	change = (data[shift >> 3] != ndata[shift >> 3]);
	if (change &&
	    snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_88D], data, 2) != 2) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	return change;
}

#define EWS88D_CONTROL(xiface, xname, xshift, xinvert, xaccess) \
{ .iface = xiface,\
  .name = xname,\
  .access = xaccess,\
  .info = snd_ice1712_ews88d_control_info,\
  .get = snd_ice1712_ews88d_control_get,\
  .put = snd_ice1712_ews88d_control_put,\
  .private_value = xshift | (xinvert << 8),\
}

static struct snd_kcontrol_new snd_ice1712_ews88d_controls[] = {
	EWS88D_CONTROL(SNDRV_CTL_ELEM_IFACE_MIXER, "IEC958 Input Optical", 0, 1, 0), /* inverted */
	EWS88D_CONTROL(SNDRV_CTL_ELEM_IFACE_MIXER, "ADAT Output Optical", 1, 0, 0),
	EWS88D_CONTROL(SNDRV_CTL_ELEM_IFACE_MIXER, "ADAT External Master Clock", 2, 0, 0),
	EWS88D_CONTROL(SNDRV_CTL_ELEM_IFACE_MIXER, "Enable ADAT", 3, 0, 0),
	EWS88D_CONTROL(SNDRV_CTL_ELEM_IFACE_MIXER, "ADAT Through", 4, 1, 0),
};


/*
 * DMX 6Fire specific controls
 */

static int snd_ice1712_6fire_read_pca(struct snd_ice1712 *ice, unsigned char reg)
{
	unsigned char byte;
	struct ews_spec *spec = ice->spec;

	snd_i2c_lock(ice->i2c);
	byte = reg;
	snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_6FIRE], &byte, 1);
	byte = 0;
	if (snd_i2c_readbytes(spec->i2cdevs[EWS_I2C_6FIRE], &byte, 1) != 1) {
		snd_i2c_unlock(ice->i2c);
		dev_err(ice->card->dev, "cannot read pca\n");
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	return byte;
}

static int snd_ice1712_6fire_write_pca(struct snd_ice1712 *ice, unsigned char reg, unsigned char data)
{
	unsigned char bytes[2];
	struct ews_spec *spec = ice->spec;

	snd_i2c_lock(ice->i2c);
	bytes[0] = reg;
	bytes[1] = data;
	if (snd_i2c_sendbytes(spec->i2cdevs[EWS_I2C_6FIRE], bytes, 2) != 2) {
		snd_i2c_unlock(ice->i2c);
		return -EIO;
	}
	snd_i2c_unlock(ice->i2c);
	return 0;
}

#define snd_ice1712_6fire_control_info		snd_ctl_boolean_mono_info

static int snd_ice1712_6fire_control_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int shift = kcontrol->private_value & 0xff;
	int invert = (kcontrol->private_value >> 8) & 1;
	int data;
	
	if ((data = snd_ice1712_6fire_read_pca(ice, PCF9554_REG_OUTPUT)) < 0)
		return data;
	data = (data >> shift) & 1;
	if (invert)
		data ^= 1;
	ucontrol->value.integer.value[0] = data;
	return 0;
}

static int snd_ice1712_6fire_control_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int shift = kcontrol->private_value & 0xff;
	int invert = (kcontrol->private_value >> 8) & 1;
	int data, ndata;
	
	if ((data = snd_ice1712_6fire_read_pca(ice, PCF9554_REG_OUTPUT)) < 0)
		return data;
	ndata = data & ~(1 << shift);
	if (ucontrol->value.integer.value[0])
		ndata |= (1 << shift);
	if (invert)
		ndata ^= (1 << shift);
	if (data != ndata) {
		snd_ice1712_6fire_write_pca(ice, PCF9554_REG_OUTPUT, (unsigned char)ndata);
		return 1;
	}
	return 0;
}

static int snd_ice1712_6fire_select_input_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
	static const char * const texts[4] = {
		"Internal", "Front Input", "Rear Input", "Wave Table"
	};
	return snd_ctl_enum_info(uinfo, 1, 4, texts);
}
     
static int snd_ice1712_6fire_select_input_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int data;
	
	if ((data = snd_ice1712_6fire_read_pca(ice, PCF9554_REG_OUTPUT)) < 0)
		return data;
	ucontrol->value.integer.value[0] = data & 3;
	return 0;
}

static int snd_ice1712_6fire_select_input_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ice1712 *ice = snd_kcontrol_chip(kcontrol);
	int data, ndata;
	
	if ((data = snd_ice1712_6fire_read_pca(ice, PCF9554_REG_OUTPUT)) < 0)
		return data;
	ndata = data & ~3;
	ndata |= (ucontrol->value.integer.value[0] & 3);
	if (data != ndata) {
		snd_ice1712_6fire_write_pca(ice, PCF9554_REG_OUTPUT, (unsigned char)ndata);
		return 1;
	}
	return 0;
}


#define DMX6FIRE_CONTROL(xname, xshift, xinvert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,\
  .name = xname,\
  .info = snd_ice1712_6fire_control_info,\
  .get = snd_ice1712_6fire_control_get,\
  .put = snd_ice1712_6fire_control_put,\
  .private_value = xshift | (xinvert << 8),\
}

static struct snd_kcontrol_new snd_ice1712_6fire_controls[] = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Analog Input Select",
		.info = snd_ice1712_6fire_select_input_info,
		.get = snd_ice1712_6fire_select_input_get,
		.put = snd_ice1712_6fire_select_input_put,
	},
	DMX6FIRE_CONTROL("Front Digital Input Switch", 2, 1),
	// DMX6FIRE_CONTROL("Master Clock Select", 3, 0),
	DMX6FIRE_CONTROL("Optical Digital Input Switch", 4, 0),
	DMX6FIRE_CONTROL("Phono Analog Input Switch", 5, 0),
	DMX6FIRE_CONTROL("Breakbox LED", 6, 0),
};


static int snd_ice1712_ews_add_controls(struct snd_ice1712 *ice)
{
	unsigned int idx;
	int err;
	
	/* all terratec cards have spdif, but cs8427 module builds it's own controls */
	if (ice->cs8427 == NULL) {
		err = snd_ice1712_spdif_build_controls(ice);
		if (err < 0)
			return err;
	}

	/* ak4524 controls */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWX2496:
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
	case ICE1712_SUBDEVICE_DMX6FIRE:
		err = snd_ice1712_akm4xxx_build_controls(ice);
		if (err < 0)
			return err;
		break;
	}

	/* card specific controls */
	switch (ice->eeprom.subvendor) {
	case ICE1712_SUBDEVICE_EWX2496:
		for (idx = 0; idx < ARRAY_SIZE(snd_ice1712_ewx2496_controls); idx++) {
			err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_ewx2496_controls[idx], ice));
			if (err < 0)
				return err;
		}
		break;
	case ICE1712_SUBDEVICE_EWS88MT:
	case ICE1712_SUBDEVICE_EWS88MT_NEW:
	case ICE1712_SUBDEVICE_PHASE88:
	case ICE1712_SUBDEVICE_TS88:
		err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_ews88mt_input_sense, ice));
		if (err < 0)
			return err;
		err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_ews88mt_output_sense, ice));
		if (err < 0)
			return err;
		break;
	case ICE1712_SUBDEVICE_EWS88D:
		for (idx = 0; idx < ARRAY_SIZE(snd_ice1712_ews88d_controls); idx++) {
			err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_ews88d_controls[idx], ice));
			if (err < 0)
				return err;
		}
		break;
	case ICE1712_SUBDEVICE_DMX6FIRE:
		for (idx = 0; idx < ARRAY_SIZE(snd_ice1712_6fire_controls); idx++) {
			err = snd_ctl_add(ice->card, snd_ctl_new1(&snd_ice1712_6fire_controls[idx], ice));
			if (err < 0)
				return err;
		}
		break;
	}
	return 0;
}


/* entry point */
struct snd_ice1712_card_info snd_ice1712_ews_cards[] = {
	{
		.subvendor = ICE1712_SUBDEVICE_EWX2496,
		.name = "TerraTec EWX24/96",
		.model = "ewx2496",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_EWS88MT,
		.name = "TerraTec EWS88MT",
		.model = "ews88mt",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_EWS88MT_NEW,
		.name = "TerraTec EWS88MT",
		.model = "ews88mt_new",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_PHASE88,
		.name = "TerraTec Phase88",
		.model = "phase88",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_TS88,
		.name = "terrasoniq TS88",
		.model = "phase88",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_EWS88D,
		.name = "TerraTec EWS88D",
		.model = "ews88d",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
	},
	{
		.subvendor = ICE1712_SUBDEVICE_DMX6FIRE,
		.name = "TerraTec DMX6Fire",
		.model = "dmx6fire",
		.chip_init = snd_ice1712_ews_init,
		.build_controls = snd_ice1712_ews_add_controls,
		.mpu401_1_name = "MIDI-Front DMX6fire",
		.mpu401_2_name = "Wavetable DMX6fire",
		.mpu401_2_info_flags = MPU401_INFO_OUTPUT,
	},
	{ } /* terminator */
};