sb_mixer.c

linux-2.6.15.6

/*
 *  Copyright (c) by Jaroslav Kysela <[e-mail]>
 *  Routines for Sound Blaster mixer control
 *
 *
 *   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 <asm/io.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/sb.h>
#include <sound/control.h>

#undef IO_DEBUG

void snd_sbmixer_write(sb_t *chip, unsigned char reg, unsigned char data)
{
	outb(reg, SBP(chip, MIXER_ADDR));
	udelay(10);
	outb(data, SBP(chip, MIXER_DATA));
	udelay(10);
#ifdef IO_DEBUG
	snd_printk(KERN_DEBUG "mixer_write 0x%x 0x%x\n", reg, data);
#endif
}

unsigned char snd_sbmixer_read(sb_t *chip, unsigned char reg)
{
	unsigned char result;

	outb(reg, SBP(chip, MIXER_ADDR));
	udelay(10);
	result = inb(SBP(chip, MIXER_DATA));
	udelay(10);
#ifdef IO_DEBUG
	snd_printk(KERN_DEBUG "mixer_read 0x%x 0x%x\n", reg, result);
#endif
	return result;
}

/*
 * Single channel mixer element
 */

static int snd_sbmixer_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_sbmixer_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 16) & 0xff;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	unsigned char val;

	spin_lock_irqsave(&sb->mixer_lock, flags);
	val = (snd_sbmixer_read(sb, reg) >> shift) & mask;
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	ucontrol->value.integer.value[0] = val;
	return 0;
}

static int snd_sbmixer_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg = kcontrol->private_value & 0xff;
	int shift = (kcontrol->private_value >> 16) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned char val, oval;

	val = (ucontrol->value.integer.value[0] & mask) << shift;
	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval = snd_sbmixer_read(sb, reg);
	val = (oval & ~(mask << shift)) | val;
	change = val != oval;
	if (change)
		snd_sbmixer_write(sb, reg, val);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	return change;
}

/*
 * Double channel mixer element
 */

static int snd_sbmixer_info_double(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	int mask = (kcontrol->private_value >> 24) & 0xff;

	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = mask;
	return 0;
}

static int snd_sbmixer_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x07;
	int right_shift = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	unsigned char left, right;

	spin_lock_irqsave(&sb->mixer_lock, flags);
	left = (snd_sbmixer_read(sb, left_reg) >> left_shift) & mask;
	right = (snd_sbmixer_read(sb, right_reg) >> right_shift) & mask;
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	ucontrol->value.integer.value[0] = left;
	ucontrol->value.integer.value[1] = right;
	return 0;
}

static int snd_sbmixer_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int left_reg = kcontrol->private_value & 0xff;
	int right_reg = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x07;
	int right_shift = (kcontrol->private_value >> 19) & 0x07;
	int mask = (kcontrol->private_value >> 24) & 0xff;
	int change;
	unsigned char left, right, oleft, oright;

	left = (ucontrol->value.integer.value[0] & mask) << left_shift;
	right = (ucontrol->value.integer.value[1] & mask) << right_shift;
	spin_lock_irqsave(&sb->mixer_lock, flags);
	if (left_reg == right_reg) {
		oleft = snd_sbmixer_read(sb, left_reg);
		left = (oleft & ~((mask << left_shift) | (mask << right_shift))) | left | right;
		change = left != oleft;
		if (change)
			snd_sbmixer_write(sb, left_reg, left);
	} else {
		oleft = snd_sbmixer_read(sb, left_reg);
		oright = snd_sbmixer_read(sb, right_reg);
		left = (oleft & ~(mask << left_shift)) | left;
		right = (oright & ~(mask << right_shift)) | right;
		change = left != oleft || right != oright;
		if (change) {
			snd_sbmixer_write(sb, left_reg, left);
			snd_sbmixer_write(sb, right_reg, right);
		}
	}
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	return change;
}

/*
 * DT-019x / ALS-007 capture/input switch
 */

static int snd_dt019x_input_sw_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	static char *texts[5] = {
		"CD", "Mic", "Line", "Synth", "Master"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 5;
	if (uinfo->value.enumerated.item > 4)
		uinfo->value.enumerated.item = 4;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_dt019x_input_sw_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned char oval;
	
	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval = snd_sbmixer_read(sb, SB_DT019X_CAPTURE_SW);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	switch (oval & 0x07) {
	case SB_DT019X_CAP_CD:
		ucontrol->value.enumerated.item[0] = 0;
		break;
	case SB_DT019X_CAP_MIC:
		ucontrol->value.enumerated.item[0] = 1;
		break;
	case SB_DT019X_CAP_LINE:
		ucontrol->value.enumerated.item[0] = 2;
		break;
	case SB_DT019X_CAP_MAIN:
		ucontrol->value.enumerated.item[0] = 4;
		break;
	/* To record the synth on these cards you must record the main.   */
	/* Thus SB_DT019X_CAP_SYNTH == SB_DT019X_CAP_MAIN and would cause */
	/* duplicate case labels if left uncommented. */
	/* case SB_DT019X_CAP_SYNTH:
	 *	ucontrol->value.enumerated.item[0] = 3;
	 *	break;
	 */
	default:
		ucontrol->value.enumerated.item[0] = 4;
		break;
	}
	return 0;
}

static int snd_dt019x_input_sw_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int change;
	unsigned char nval, oval;
	
	if (ucontrol->value.enumerated.item[0] > 4)
		return -EINVAL;
	switch (ucontrol->value.enumerated.item[0]) {
	case 0:
		nval = SB_DT019X_CAP_CD;
		break;
	case 1:
		nval = SB_DT019X_CAP_MIC;
		break;
	case 2:
		nval = SB_DT019X_CAP_LINE;
		break;
	case 3:
		nval = SB_DT019X_CAP_SYNTH;
		break;
	case 4:
		nval = SB_DT019X_CAP_MAIN;
		break;
	default:
		nval = SB_DT019X_CAP_MAIN;
	}
	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval = snd_sbmixer_read(sb, SB_DT019X_CAPTURE_SW);
	change = nval != oval;
	if (change)
		snd_sbmixer_write(sb, SB_DT019X_CAPTURE_SW, nval);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	return change;
}

/*
 * SBPRO input multiplexer
 */

static int snd_sb8mixer_info_mux(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	static char *texts[3] = {
		"Mic", "CD", "Line"
	};

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 3;
	if (uinfo->value.enumerated.item > 2)
		uinfo->value.enumerated.item = 2;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}


static int snd_sb8mixer_get_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	unsigned char oval;
	
	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval = snd_sbmixer_read(sb, SB_DSP_CAPTURE_SOURCE);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	switch ((oval >> 0x01) & 0x03) {
	case SB_DSP_MIXS_CD:
		ucontrol->value.enumerated.item[0] = 1;
		break;
	case SB_DSP_MIXS_LINE:
		ucontrol->value.enumerated.item[0] = 2;
		break;
	default:
		ucontrol->value.enumerated.item[0] = 0;
		break;
	}
	return 0;
}

static int snd_sb8mixer_put_mux(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int change;
	unsigned char nval, oval;
	
	if (ucontrol->value.enumerated.item[0] > 2)
		return -EINVAL;
	switch (ucontrol->value.enumerated.item[0]) {
	case 1:
		nval = SB_DSP_MIXS_CD;
		break;
	case 2:
		nval = SB_DSP_MIXS_LINE;
		break;
	default:
		nval = SB_DSP_MIXS_MIC;
	}
	nval <<= 1;
	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval = snd_sbmixer_read(sb, SB_DSP_CAPTURE_SOURCE);
	nval |= oval & ~0x06;
	change = nval != oval;
	if (change)
		snd_sbmixer_write(sb, SB_DSP_CAPTURE_SOURCE, nval);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	return change;
}

/*
 * SB16 input switch
 */

static int snd_sb16mixer_info_input_sw(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 4;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int snd_sb16mixer_get_input_sw(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg1 = kcontrol->private_value & 0xff;
	int reg2 = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x0f;
	int right_shift = (kcontrol->private_value >> 24) & 0x0f;
	unsigned char val1, val2;

	spin_lock_irqsave(&sb->mixer_lock, flags);
	val1 = snd_sbmixer_read(sb, reg1);
	val2 = snd_sbmixer_read(sb, reg2);
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	ucontrol->value.integer.value[0] = (val1 >> left_shift) & 0x01;
	ucontrol->value.integer.value[1] = (val2 >> left_shift) & 0x01;
	ucontrol->value.integer.value[2] = (val1 >> right_shift) & 0x01;
	ucontrol->value.integer.value[3] = (val2 >> right_shift) & 0x01;
	return 0;
}                                                                                                                   

static int snd_sb16mixer_put_input_sw(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	sb_t *sb = snd_kcontrol_chip(kcontrol);
	unsigned long flags;
	int reg1 = kcontrol->private_value & 0xff;
	int reg2 = (kcontrol->private_value >> 8) & 0xff;
	int left_shift = (kcontrol->private_value >> 16) & 0x0f;
	int right_shift = (kcontrol->private_value >> 24) & 0x0f;
	int change;
	unsigned char val1, val2, oval1, oval2;

	spin_lock_irqsave(&sb->mixer_lock, flags);
	oval1 = snd_sbmixer_read(sb, reg1);
	oval2 = snd_sbmixer_read(sb, reg2);
	val1 = oval1 & ~((1 << left_shift) | (1 << right_shift));
	val2 = oval2 & ~((1 << left_shift) | (1 << right_shift));
	val1 |= (ucontrol->value.integer.value[0] & 1) << left_shift;
	val2 |= (ucontrol->value.integer.value[1] & 1) << left_shift;
	val1 |= (ucontrol->value.integer.value[2] & 1) << right_shift;
	val2 |= (ucontrol->value.integer.value[3] & 1) << right_shift;
	change = val1 != oval1 || val2 != oval2;
	if (change) {
		snd_sbmixer_write(sb, reg1, val1);
		snd_sbmixer_write(sb, reg2, val2);
	}
	spin_unlock_irqrestore(&sb->mixer_lock, flags);
	return change;
}


/*
 */
/*
 */
int snd_sbmixer_add_ctl(sb_t *chip, const char *name, int index, int type, unsigned long value)
{
	static snd_kcontrol_new_t newctls[] = {
		[SB_MIX_SINGLE] = {
			.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
			.info = snd_sbmixer_info_single,
			.get = snd_sbmixer_get_single,
			.put = snd_sbmixer_put_single,
		},
		[SB_MIX_DOUBLE] = {
			.iface = SNDRV_CTL_ELEM_IFACE_MIXER,