linux/sound/pci/ca0106/ca0106_mixer.c

/*
 *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
 *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
 *  Version: 0.0.17
 *
 *  FEATURES currently supported:
 *    See ca0106_main.c for features.
 * 
 *  Changelog:
 *    Support interrupts per period.
 *    Removed noise from Center/LFE channel when in Analog mode.
 *    Rename and remove mixer controls.
 *  0.0.6
 *    Use separate card based DMA buffer for periods table list.
 *  0.0.7
 *    Change remove and rename ctrls into lists.
 *  0.0.8
 *    Try to fix capture sources.
 *  0.0.9
 *    Fix AC3 output.
 *    Enable S32_LE format support.
 *  0.0.10
 *    Enable playback 48000 and 96000 rates. (Rates other that these do not work, even with "plug:front".)
 *  0.0.11
 *    Add Model name recognition.
 *  0.0.12
 *    Correct interrupt timing. interrupt at end of period, instead of in the middle of a playback period.
 *    Remove redundent "voice" handling.
 *  0.0.13
 *    Single trigger call for multi channels.
 *  0.0.14
 *    Set limits based on what the sound card hardware can do.
 *    playback periods_min=2, periods_max=8
 *    capture hw constraints require period_size = n * 64 bytes.
 *    playback hw constraints require period_size = n * 64 bytes.
 *  0.0.15
 *    Separated ca0106.c into separate functional .c files.
 *  0.0.16
 *    Modified Copyright message.
 *  0.0.17
 *    Implement Mic and Line in Capture.
 *
 *  This code was initally based on code from ALSA's emu10k1x.c which is:
 *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.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
 *
 */
#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/info.h>
#include <sound/tlv.h>
#include <asm/io.h>

#include "ca0106.h"

static const DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale1, -5175, 25, 1);
static const DECLARE_TLV_DB_SCALE(snd_ca0106_db_scale2, -10350, 50, 1);

static int snd_ca0106_shared_spdif_info(struct snd_kcontrol *kcontrol,
					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;
}

static int snd_ca0106_shared_spdif_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->spdif_enable;
	return 0;
}

static int snd_ca0106_shared_spdif_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int val;
	int change = 0;
	u32 mask;

	val = ucontrol->value.enumerated.item[0] ;
	change = (emu->spdif_enable != val);
	if (change) {
		emu->spdif_enable = val;
		if (val == 1) {
			/* Digital */
			snd_ca0106_ptr_write(emu, SPDIF_SELECT1, 0, 0xf);
			snd_ca0106_ptr_write(emu, SPDIF_SELECT2, 0, 0x0b000000);
			snd_ca0106_ptr_write(emu, CAPTURE_CONTROL, 0,
				snd_ca0106_ptr_read(emu, CAPTURE_CONTROL, 0) & ~0x1000);
			mask = inl(emu->port + GPIO) & ~0x101;
			outl(mask, emu->port + GPIO);

		} else {
			/* Analog */
			snd_ca0106_ptr_write(emu, SPDIF_SELECT1, 0, 0xf);
			snd_ca0106_ptr_write(emu, SPDIF_SELECT2, 0, 0x000f0000);
			snd_ca0106_ptr_write(emu, CAPTURE_CONTROL, 0,
				snd_ca0106_ptr_read(emu, CAPTURE_CONTROL, 0) | 0x1000);
			mask = inl(emu->port + GPIO) | 0x101;
			outl(mask, emu->port + GPIO);
		}
	}
        return change;
}

static int snd_ca0106_capture_source_info(struct snd_kcontrol *kcontrol,
					  struct snd_ctl_elem_info *uinfo)
{
	static char *texts[6] = {
		"IEC958 out", "i2s mixer out", "IEC958 in", "i2s in", "AC97 in", "SRC out"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 6;
	if (uinfo->value.enumerated.item > 5)
                uinfo->value.enumerated.item = 5;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ca0106_capture_source_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->capture_source;
	return 0;
}

static int snd_ca0106_capture_source_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int val;
	int change = 0;
	u32 mask;
	u32 source;

	val = ucontrol->value.enumerated.item[0] ;
	change = (emu->capture_source != val);
	if (change) {
		emu->capture_source = val;
		source = (val << 28) | (val << 24) | (val << 20) | (val << 16);
		mask = snd_ca0106_ptr_read(emu, CAPTURE_SOURCE, 0) & 0xffff;
		snd_ca0106_ptr_write(emu, CAPTURE_SOURCE, 0, source | mask);
	}
        return change;
}

static int snd_ca0106_i2c_capture_source_info(struct snd_kcontrol *kcontrol,
					  struct snd_ctl_elem_info *uinfo)
{
	static char *texts[6] = {
		"Phone", "Mic", "Line in", "Aux"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 4;
	if (uinfo->value.enumerated.item > 3)
                uinfo->value.enumerated.item = 3;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ca0106_i2c_capture_source_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->i2c_capture_source;
	return 0;
}

static int snd_ca0106_i2c_capture_source_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int source_id;
	unsigned int ngain, ogain;
	int change = 0;
	u32 source;
	/* If the capture source has changed,
	 * update the capture volume from the cached value
	 * for the particular source.
	 */
	source_id = ucontrol->value.enumerated.item[0] ;
	change = (emu->i2c_capture_source != source_id);
	if (change) {
		snd_ca0106_i2c_write(emu, ADC_MUX, 0); /* Mute input */
		ngain = emu->i2c_capture_volume[source_id][0]; /* Left */
		ogain = emu->i2c_capture_volume[emu->i2c_capture_source][0]; /* Left */
		if (ngain != ogain)
			snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCL, ((ngain) & 0xff));
		ngain = emu->i2c_capture_volume[source_id][1]; /* Left */
		ogain = emu->i2c_capture_volume[emu->i2c_capture_source][1]; /* Left */
		if (ngain != ogain)
			snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCR, ((ngain) & 0xff));
		source = 1 << source_id;
		snd_ca0106_i2c_write(emu, ADC_MUX, source); /* Set source */
		emu->i2c_capture_source = source_id;
	}
        return change;
}

static int snd_ca0106_capture_line_in_side_out_info(struct snd_kcontrol *kcontrol,
					       struct snd_ctl_elem_info *uinfo)
{
	static char *texts[2] = { "Side out", "Line in" };

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 2;
	if (uinfo->value.enumerated.item > 1)
                uinfo->value.enumerated.item = 1;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ca0106_capture_mic_line_in_info(struct snd_kcontrol *kcontrol,
					       struct snd_ctl_elem_info *uinfo)
{
	static char *texts[2] = { "Line in", "Mic in" };

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 2;
	if (uinfo->value.enumerated.item > 1)
                uinfo->value.enumerated.item = 1;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_ca0106_capture_mic_line_in_get(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);

	ucontrol->value.enumerated.item[0] = emu->capture_mic_line_in;
	return 0;
}

static int snd_ca0106_capture_mic_line_in_put(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int val;
	int change = 0;
	u32 tmp;

	val = ucontrol->value.enumerated.item[0] ;
	change = (emu->capture_mic_line_in != val);
	if (change) {
		emu->capture_mic_line_in = val;
		if (val) {
			//snd_ca0106_i2c_write(emu, ADC_MUX, 0); /* Mute input */
			tmp = inl(emu->port+GPIO) & ~0x400;
			tmp = tmp | 0x400;
			outl(tmp, emu->port+GPIO);
			//snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_MIC);
		} else {
			//snd_ca0106_i2c_write(emu, ADC_MUX, 0); /* Mute input */
			tmp = inl(emu->port+GPIO) & ~0x400;
			outl(tmp, emu->port+GPIO);
			//snd_ca0106_i2c_write(emu, ADC_MUX, ADC_MUX_LINEIN);
		}
	}
        return change;
}

static struct snd_kcontrol_new snd_ca0106_capture_mic_line_in __devinitdata =
{
	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
	.name =		"Shared Mic/Line in Capture Switch",
	.info =		snd_ca0106_capture_mic_line_in_info,
	.get =		snd_ca0106_capture_mic_line_in_get,
	.put =		snd_ca0106_capture_mic_line_in_put
};

static struct snd_kcontrol_new snd_ca0106_capture_line_in_side_out __devinitdata =
{
	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
	.name =		"Shared Line in/Side out Capture Switch",
	.info =		snd_ca0106_capture_line_in_side_out_info,
	.get =		snd_ca0106_capture_mic_line_in_get,
	.put =		snd_ca0106_capture_mic_line_in_put
};


static int snd_ca0106_spdif_info(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;
	return 0;
}

static int snd_ca0106_spdif_get(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);

	ucontrol->value.iec958.status[0] = (emu->spdif_bits[idx] >> 0) & 0xff;
	ucontrol->value.iec958.status[1] = (emu->spdif_bits[idx] >> 8) & 0xff;
	ucontrol->value.iec958.status[2] = (emu->spdif_bits[idx] >> 16) & 0xff;
	ucontrol->value.iec958.status[3] = (emu->spdif_bits[idx] >> 24) & 0xff;
        return 0;
}

static int snd_ca0106_spdif_get_mask(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.iec958.status[0] = 0xff;
	ucontrol->value.iec958.status[1] = 0xff;
	ucontrol->value.iec958.status[2] = 0xff;
	ucontrol->value.iec958.status[3] = 0xff;
        return 0;
}

static int snd_ca0106_spdif_put(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
	struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
	int change;
	unsigned int val;

	val = (ucontrol->value.iec958.status[0] << 0) |
	      (ucontrol->value.iec958.status[1] << 8) |
	      (ucontrol->value.iec958.status[2] << 16) |
	      (ucontrol->value.iec958.status[3] << 24);
	change = val != emu->spdif_bits[idx];
	if (change) {
		snd_ca0106_ptr_write(emu, SPCS0 + idx, 0, val);
		emu->spdif_bits[idx] = val;
	}
        return change;
}

static int snd_ca0106_volume_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 = 255;
        return 0;
}

static int snd_ca0106_volume_get(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
        unsigned int value;
	int channel_id, reg;

	channel_id = (kcontrol->private_value >> 8) & 0xff;
	reg = kcontrol->private_value & 0xff;

        value = snd_ca0106_ptr_read(emu, reg, channel_id);
        ucontrol->value.integer.value[0] = 0xff - ((value >> 24) & 0xff); /* Left */
        ucontrol->value.integer.value[1] = 0xff - ((value >> 16) & 0xff); /* Right */
        return 0;
}

static int snd_ca0106_volume_put(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
        unsigned int oval, nval;
	int channel_id, reg;

	channel_id = (kcontrol->private_value >> 8) & 0xff;
	reg = kcontrol->private_value & 0xff;

	oval = snd_ca0106_ptr_read(emu, reg, channel_id);
	nval = ((0xff - ucontrol->value.integer.value[0]) << 24) |
		((0xff - ucontrol->value.integer.value[1]) << 16);
        nval |= ((0xff - ucontrol->value.integer.value[0]) << 8) |
		((0xff - ucontrol->value.integer.value[1]) );
	if (oval == nval)
		return 0;
	snd_ca0106_ptr_write(emu, reg, channel_id, nval);
	return 1;
}

static int snd_ca0106_i2c_volume_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 = 255;
        return 0;
}

static int snd_ca0106_i2c_volume_get(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
	int source_id;

	source_id = kcontrol->private_value;

        ucontrol->value.integer.value[0] = emu->i2c_capture_volume[source_id][0];
        ucontrol->value.integer.value[1] = emu->i2c_capture_volume[source_id][1];
        return 0;
}

static int snd_ca0106_i2c_volume_put(struct snd_kcontrol *kcontrol,
				 struct snd_ctl_elem_value *ucontrol)
{
        struct snd_ca0106 *emu = snd_kcontrol_chip(kcontrol);
        unsigned int ogain;
        unsigned int ngain;
	int source_id;
	int change = 0;

	source_id = kcontrol->private_value;
	ogain = emu->i2c_capture_volume[source_id][0]; /* Left */
	ngain = ucontrol->value.integer.value[0];
	if (ngain > 0xff)
		return 0;
	if (ogain != ngain) {
		if (emu->i2c_capture_source == source_id)
			snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCL, ((ngain) & 0xff) );
		emu->i2c_capture_volume[source_id][0] = ucontrol->value.integer.value[0];
		change = 1;
	}
	ogain = emu->i2c_capture_volume[source_id][1]; /* Right */
	ngain = ucontrol->value.integer.value[1];
	if (ngain > 0xff)
		return 0;
	if (ogain != ngain) {
		if (emu->i2c_capture_source == source_id)
			snd_ca0106_i2c_write(emu, ADC_ATTEN_ADCR, ((ngain) & 0xff));
		emu->i2c_capture_volume[source_id][1] = ucontrol->value.integer.value[1];
		change = 1;
	}

	return change;
}

#define CA_VOLUME(xname,chid,reg) \
{								\
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,	\
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |		\
	          SNDRV_CTL_ELEM_ACCESS_TLV_READ,		\
	.info =	 snd_ca0106_volume_info,			\
	.get =   snd_ca0106_volume_get,				\
	.put =   snd_ca0106_volume_put,				\
	.tlv = { .p = snd_ca0106_db_scale1 },			\
	.private_value = ((chid) << 8) | (reg)			\
}

static struct snd_kcontrol_new snd_ca0106_volume_ctls[] __devinitdata = {
	CA_VOLUME("Analog Front Playback Volume",
		  CONTROL_FRONT_CHANNEL, PLAYBACK_VOLUME2),
        CA_VOLUME("Analog Rear Playback Volume",
		  CONTROL_REAR_CHANNEL, PLAYBACK_VOLUME2),
	CA_VOLUME("Analog Center/LFE Playback Volume",
		  CONTROL_CENTER_LFE_CHANNEL, PLAYBACK_VOLUME2),
        CA_VOLUME("Analog Side Playback Volume",
		  CONTROL_UNKNOWN_CHANNEL, PLAYBACK_VOLUME2),

        CA_VOLUME("IEC958 Front Playback Volume",
		  CONTROL_FRONT_CHANNEL, PLAYBACK_VOLUME1),
	CA_VOLUME("IEC958 Rear Playback Volume",
		  CONTROL_REAR_CHANNEL, PLAYBACK_VOLUME1),
	CA_VOLUME("IEC958 Center/LFE Playback Volume",
		  CONTROL_CENTER_LFE_CHANNEL, PLAYBACK_VOLUME1),
	CA_VOLUME("IEC958 Unknown Playback Volume",
		  CONTROL_UNKNOWN_CHANNEL, PLAYBACK_VOLUME1),

        CA_VOLUME("CAPTURE feedback Playback Volume",
		  1, CAPTURE_CONTROL),

	{
		.access =	SNDRV_CTL_ELEM_ACCESS_READ,
		.iface =        SNDRV_CTL_ELEM_IFACE_PCM,
		.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
		.count =	4,
		.info =         snd_ca0106_spdif_info,
		.get =          snd_ca0106_spdif_get_mask
	},
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
		.name =		"IEC958 Playback Switch",
		.info =		snd_ca0106_shared_spdif_info,
		.get =		snd_ca0106_shared_spdif_get,
		.put =		snd_ca0106_shared_spdif_put
	},
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
		.name =		"Digital Source Capture Enum",
		.info =		snd_ca0106_capture_source_info,
		.get =		snd_ca0106_capture_source_get,
		.put =		snd_ca0106_capture_source_put
	},
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
		.name =		"Analog Source Capture Enum",
		.info =		snd_ca0106_i2c_capture_source_info,
		.get =		snd_ca0106_i2c_capture_source_get,
		.put =		snd_ca0106_i2c_capture_source_put
	},
	{
		.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
		.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
		.count =	4,
		.info =         snd_ca0106_spdif_info,
		.get =          snd_ca0106_spdif_get,
		.put =          snd_ca0106_spdif_put
	},
};

#define I2C_VOLUME(xname,chid) \
{								\
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,	\
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |		\
	          SNDRV_CTL_ELEM_ACCESS_TLV_READ,		\
	.info =  snd_ca0106_i2c_volume_info,			\
	.get =   snd_ca0106_i2c_volume_get,			\
	.put =   snd_ca0106_i2c_volume_put,			\
	.tlv = { .p = snd_ca0106_db_scale2 },			\
	.private_value = chid					\
}

static struct snd_kcontrol_new snd_ca0106_volume_i2c_adc_ctls[] __devinitdata = {
        I2C_VOLUME("Phone Capture Volume", 0),
        I2C_VOLUME("Mic Capture Volume", 1),
        I2C_VOLUME("Line in Capture Volume", 2),
        I2C_VOLUME("Aux Capture Volume", 3),
};

static int __devinit remove_ctl(struct snd_card *card, const char *name)
{
	struct snd_ctl_elem_id id;
	memset(&id, 0, sizeof(id));
	strcpy(id.name, name);
	id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_remove_id(card, &id);
}

static struct snd_kcontrol __devinit *ctl_find(struct snd_card *card, const char *name)
{
	struct snd_ctl_elem_id sid;
	memset(&sid, 0, sizeof(sid));
	/* FIXME: strcpy is bad. */
	strcpy(sid.name, name);
	sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	return snd_ctl_find_id(card, &sid);
}

static int __devinit rename_ctl(struct snd_card *card, const char *src, const char *dst)
{
	struct snd_kcontrol *kctl = ctl_find(card, src);
	if (kctl) {
		strcpy(kctl->id.name, dst);
		return 0;
	}
	return -ENOENT;
}

int __devinit snd_ca0106_mixer(struct snd_ca0106 *emu)
{
	int i, err;
        struct snd_card *card = emu->card;
	char **c;
	static char *ca0106_remove_ctls[] = {
		"Master Mono Playback Switch",
		"Master Mono Playback Volume",
		"3D Control - Switch",
		"3D Control Sigmatel - Depth",
		"PCM Playback Switch",
		"PCM Playback Volume",
		"CD Playback Switch",
		"CD Playback Volume",
		"Phone Playback Switch",
		"Phone Playback Volume",
		"Video Playback Switch",
		"Video Playback Volume",
		"PC Speaker Playback Switch",
		"PC Speaker Playback Volume",
		"Mono Output Select",
		"Capture Source",
		"Capture Switch",
		"Capture Volume",
		"External Amplifier",
		"Sigmatel 4-Speaker Stereo Playback Switch",
		"Sigmatel Surround Phase Inversion Playback ",
		NULL
	};
	static char *ca0106_rename_ctls[] = {
		"Master Playback Switch", "Capture Switch",
		"Master Playback Volume", "Capture Volume",
		"Line Playback Switch", "AC97 Line Capture Switch",
		"Line Playback Volume", "AC97 Line Capture Volume",
		"Aux Playback Switch", "AC97 Aux Capture Switch",
		"Aux Playback Volume", "AC97 Aux Capture Volume",
		"Mic Playback Switch", "AC97 Mic Capture Switch",
		"Mic Playback Volume", "AC97 Mic Capture Volume",
		"Mic Select", "AC97 Mic Select",
		"Mic Boost (+20dB)", "AC97 Mic Boost (+20dB)",
		NULL
	};
#if 1
	for (c = ca0106_remove_ctls; *c; c++)
		remove_ctl(card, *c);
	for (c = ca0106_rename_ctls; *c; c += 2)
		rename_ctl(card, c[0], c[1]);
#endif

	for (i = 0; i < ARRAY_SIZE(snd_ca0106_volume_ctls); i++) {
		err = snd_ctl_add(card, snd_ctl_new1(&snd_ca0106_volume_ctls[i], emu));
		if (err < 0)
			return err;
	}
	if (emu->details->i2c_adc == 1) {
		for (i = 0; i < ARRAY_SIZE(snd_ca0106_volume_i2c_adc_ctls); i++) {
			err = snd_ctl_add(card, snd_ctl_new1(&snd_ca0106_volume_i2c_adc_ctls[i], emu));
			if (err < 0)
				return err;
		}
		if (emu->details->gpio_type == 1)
			err = snd_ctl_add(card, snd_ctl_new1(&snd_ca0106_capture_mic_line_in, emu));
		else  /* gpio_type == 2 */
			err = snd_ctl_add(card, snd_ctl_new1(&snd_ca0106_capture_line_in_side_out, emu));
		if (err < 0)
			return err;
	}
        return 0;
}