path: root/sound/i2c/other/ak4xxx-adda.c

/*
 *   ALSA driver for AK4524 / AK4528 / AK4529 / AK4355 / AK4358 / AK4381
 *   AD and DA converters
 *
 *	Copyright (c) 2000-2004 Jaroslav Kysela <perex@perex.cz>,
 *				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 <sound/core.h>
#include <sound/control.h>
#include <sound/tlv.h>
#include <sound/ak4xxx-adda.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("Routines for control of AK452x / AK43xx  AD/DA converters");
MODULE_LICENSE("GPL");

/* write the given register and save the data to the cache */
void snd_akm4xxx_write(struct snd_akm4xxx *ak, int chip, unsigned char reg,
		       unsigned char val)
{
	ak->ops.lock(ak, chip);
	ak->ops.write(ak, chip, reg, val);

	/* save the data */
	snd_akm4xxx_set(ak, chip, reg, val);
	ak->ops.unlock(ak, chip);
}

EXPORT_SYMBOL(snd_akm4xxx_write);

/* reset procedure for AK4524 and AK4528 */
static void ak4524_reset(struct snd_akm4xxx *ak, int state)
{
	unsigned int chip;
	unsigned char reg, maxreg;

	if (ak->type == SND_AK4528)
		maxreg = 0x06;
	else
		maxreg = 0x08;
	for (chip = 0; chip < ak->num_dacs/2; chip++) {
		snd_akm4xxx_write(ak, chip, 0x01, state ? 0x00 : 0x03);
		if (state)
			continue;
		/* DAC volumes */
		for (reg = 0x04; reg < maxreg; reg++)
			snd_akm4xxx_write(ak, chip, reg,
					  snd_akm4xxx_get(ak, chip, reg));
	}
}

/* reset procedure for AK4355 and AK4358 */
static void ak4355_reset(struct snd_akm4xxx *ak, int state)
{
	unsigned char reg;

	if (state) {
		snd_akm4xxx_write(ak, 0, 0x01, 0x02); /* reset and soft-mute */
		return;
	}
	for (reg = 0x00; reg < 0x0b; reg++)
		if (reg != 0x01)
			snd_akm4xxx_write(ak, 0, reg,
					  snd_akm4xxx_get(ak, 0, reg));
	snd_akm4xxx_write(ak, 0, 0x01, 0x01); /* un-reset, unmute */
}

/* reset procedure for AK4381 */
static void ak4381_reset(struct snd_akm4xxx *ak, int state)
{
	unsigned int chip;
	unsigned char reg;

	for (chip = 0; chip < ak->num_dacs/2; chip++) {
		snd_akm4xxx_write(ak, chip, 0x00, state ? 0x0c : 0x0f);
		if (state)
			continue;
		for (reg = 0x01; reg < 0x05; reg++)
			snd_akm4xxx_write(ak, chip, reg,
					  snd_akm4xxx_get(ak, chip, reg));
	}
}

/*
 * reset the AKM codecs
 * @state: 1 = reset codec, 0 = restore the registers
 *
 * assert the reset operation and restores the register values to the chips.
 */
void snd_akm4xxx_reset(struct snd_akm4xxx *ak, int state)
{
	switch (ak->type) {
	case SND_AK4524:
	case SND_AK4528:
		ak4524_reset(ak, state);
		break;
	case SND_AK4529:
		/* FIXME: needed for ak4529? */
		break;
	case SND_AK4355:
	case SND_AK4358:
		ak4355_reset(ak, state);
		break;
	case SND_AK4381:
		ak4381_reset(ak, state);
		break;
	default:
		break;
	}
}

EXPORT_SYMBOL(snd_akm4xxx_reset);


/*
 * Volume conversion table for non-linear volumes
 * from -63.5dB (mute) to 0dB step 0.5dB
 *
 * Used for AK4524 input/ouput attenuation, AK4528, and
 * AK5365 input attenuation
 */
static const unsigned char vol_cvt_datt[128] = {
	0x00, 0x01, 0x01, 0x02, 0x02, 0x03, 0x03, 0x04,
	0x04, 0x04, 0x04, 0x05, 0x05, 0x05, 0x06, 0x06,
	0x06, 0x07, 0x07, 0x08, 0x08, 0x08, 0x09, 0x0a,
	0x0a, 0x0b, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x0f,
	0x10, 0x10, 0x11, 0x12, 0x12, 0x13, 0x13, 0x14,
	0x15, 0x16, 0x17, 0x17, 0x18, 0x19, 0x1a, 0x1c,
	0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x23,
	0x24, 0x25, 0x26, 0x28, 0x29, 0x2a, 0x2b, 0x2d,
	0x2e, 0x30, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
	0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3e, 0x3f, 0x40,
	0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x48,