/*
 *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
 *  Routines for control of CS4235/4236B/4237B/4238B/4239 chips
 *
 *  Note:
 *     -----
 *
 *  Bugs:
 *     -----
 *
 *   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
 *
 */

/*
 *  Indirect control registers (CS4236B+)
 * 
 *  C0
 *     D8: WSS reset (all chips)
 *
 *  C1 (all chips except CS4236)
 *     D7-D5: version 
 *     D4-D0: chip id
 *             11101 - CS4235
 *             01011 - CS4236B
 *             01000 - CS4237B
 *             01001 - CS4238B
 *             11110 - CS4239
 *
 *  C2
 *     D7-D4: 3D Space (CS4235,CS4237B,CS4238B,CS4239)
 *     D3-D0: 3D Center (CS4237B); 3D Volume (CS4238B)
 * 
 *  C3
 *     D7: 3D Enable (CS4237B)
 *     D6: 3D Mono Enable (CS4237B)
 *     D5: 3D Serial Output (CS4237B,CS4238B)
 *     D4: 3D Enable (CS4235,CS4238B,CS4239)
 *
 *  C4
 *     D7: consumer serial port enable (CS4237B,CS4238B)
 *     D6: channels status block reset (CS4237B,CS4238B)
 *     D5: user bit in sub-frame of digital audio data (CS4237B,CS4238B)
 *     D4: validity bit bit in sub-frame of digital audio data (CS4237B,CS4238B)
 * 
 *  C5  lower channel status (digital serial data description) (CS4237B,CS4238B)
 *     D7-D6: first two bits of category code
 *     D5: lock
 *     D4-D3: pre-emphasis (0 = none, 1 = 50/15us)
 *     D2: copy/copyright (0 = copy inhibited)
 *     D1: 0 = digital audio / 1 = non-digital audio
 *     
 *  C6  upper channel status (digital serial data description) (CS4237B,CS4238B)
 *     D7-D6: sample frequency (0 = 44.1kHz)
 *     D5: generation status (0 = no indication, 1 = original/commercially precaptureed data)
 *     D4-D0: category code (upper bits)
 *
 *  C7  reserved (must write 0)
 *
 *  C8  wavetable control
 *     D7: volume control interrupt enable (CS4235,CS4239)
 *     D6: hardware volume control format (CS4235,CS4239)
 *     D3: wavetable serial port enable (all chips)
 *     D2: DSP serial port switch (all chips)
 *     D1: disable MCLK (all chips)
 *     D0: force BRESET low (all chips)
 *
 */

#include <sound/driver.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/time.h>
#include <linux/wait.h>
#include <sound/core.h>
#include <sound/cs4231.h>
#include <sound/asoundef.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Routines for control of CS4235/4236B/4237B/4238B/4239 chips");
MODULE_LICENSE("GPL");

/*
 *
 */

static unsigned char snd_cs4236_ext_map[18] = {
        /* CS4236_LEFT_LINE */          0xff,
        /* CS4236_RIGHT_LINE */         0xff,
        /* CS4236_LEFT_MIC */           0xdf,
        /* CS4236_RIGHT_MIC */          0xdf,
        /* CS4236_LEFT_MIX_CTRL */      0xe0 | 0x18,
        /* CS4236_RIGHT_MIX_CTRL */     0xe0,
        /* CS4236_LEFT_FM */            0xbf,
        /* CS4236_RIGHT_FM */           0xbf,
        /* CS4236_LEFT_DSP */           0xbf,
        /* CS4236_RIGHT_DSP */          0xbf,
        /* CS4236_RIGHT_LOOPBACK */     0xbf,
        /* CS4236_DAC_MUTE */           0xe0,
        /* CS4236_ADC_RATE */           0x01,   /* 48kHz */
        /* CS4236_DAC_RATE */           0x01,   /* 48kHz */
        /* CS4236_LEFT_MASTER */        0xbf,
        /* CS4236_RIGHT_MASTER */       0xbf,
        /* CS4236_LEFT_WAVE */          0xbf,
        /* CS4236_RIGHT_WAVE */         0xbf
};

/*
 *
 */

static void snd_cs4236_ctrl_out(cs4231_t *chip, unsigned char reg, unsigned char val)
{
        outb(reg, chip->cport + 3);
        outb(chip->cimage[reg] = val, chip->cport + 4);
}

static unsigned char snd_cs4236_ctrl_in(cs4231_t *chip, unsigned char reg)
{
        outb(reg, chip->cport + 3);
        return inb(chip->cport + 4);
}

/*
 *  PCM
 */

#define CLOCKS 8

static ratnum_t clocks[CLOCKS] = {
        { .num = 16934400, .den_min = 353, .den_max = 353, .den_step = 1 },
        { .num = 16934400, .den_min = 529, .den_max = 529, .den_step = 1 },
        { .num = 16934400, .den_min = 617, .den_max = 617, .den_step = 1 },
        { .num = 16934400, .den_min = 1058, .den_max = 1058, .den_step = 1 },
        { .num = 16934400, .den_min = 1764, .den_max = 1764, .den_step = 1 },
        { .num = 16934400, .den_min = 2117, .den_max = 2117, .den_step = 1 },
        { .num = 16934400, .den_min = 2558, .den_max = 2558, .den_step = 1 },
        { .num = 16934400/16, .den_min = 21, .den_max = 192, .den_step = 1 }
};

static snd_pcm_hw_constraint_ratnums_t hw_constraints_clocks = {
        .nrats = CLOCKS,
        .rats = clocks,
};

static int snd_cs4236_xrate(snd_pcm_runtime_t *runtime)
{
        return snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                             &hw_constraints_clocks);
}

static unsigned char divisor_to_rate_register(unsigned int divisor)
{
        switch (divisor) {
        case 353:       return 1;
        case 529:       return 2;
        case 617:       return 3;
        case 1058:      return 4;
        case 1764:      return 5;
        case 2117:      return 6;
        case 2558:      return 7;
        default:
                snd_runtime_check(divisor >= 21 && divisor <= 192, return 192);
                return divisor;
        }
}

static void snd_cs4236_playback_format(cs4231_t *chip, snd_pcm_hw_params_t *params, unsigned char pdfr)
{
        unsigned long flags;
        unsigned char rate = divisor_to_rate_register(params->rate_den);
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        /* set fast playback format change and clean playback FIFO */
        snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x10);
        snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT, pdfr & 0xf0);
        snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] & ~0x10);
        snd_cs4236_ext_out(chip, CS4236_DAC_RATE, rate);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
}

static void snd_cs4236_capture_format(cs4231_t *chip, snd_pcm_hw_params_t *params, unsigned char cdfr)
{
        unsigned long flags;
        unsigned char rate = divisor_to_rate_register(params->rate_den);
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        /* set fast capture format change and clean capture FIFO */
        snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] | 0x20);
        snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr & 0xf0);
        snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1] & ~0x20);
        snd_cs4236_ext_out(chip, CS4236_ADC_RATE, rate);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
}

#ifdef CONFIG_PM

static void snd_cs4236_suspend(cs4231_t *chip)
{
        int reg;
        unsigned long flags;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        for (reg = 0; reg < 32; reg++)
                chip->image[reg] = snd_cs4231_in(chip, reg);
        for (reg = 0; reg < 18; reg++)
                chip->eimage[reg] = snd_cs4236_ext_in(chip, CS4236_I23VAL(reg));
        for (reg = 2; reg < 9; reg++)
                chip->cimage[reg] = snd_cs4236_ctrl_in(chip, reg);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
}

static void snd_cs4236_resume(cs4231_t *chip)
{
        int reg;
        unsigned long flags;
        
        snd_cs4231_mce_up(chip);
        spin_lock_irqsave(&chip->reg_lock, flags);
        for (reg = 0; reg < 32; reg++) {
                switch (reg) {
                case CS4236_EXT_REG:
                case CS4231_VERSION:
                case 27:        /* why? CS4235 - master left */
                case 29:        /* why? CS4235 - master right */
                        break;
                default:
                        snd_cs4231_out(chip, reg, chip->image[reg]);
                        break;
                }
        }
        for (reg = 0; reg < 18; reg++)
                snd_cs4236_ext_out(chip, CS4236_I23VAL(reg), chip->eimage[reg]);
        for (reg = 2; reg < 9; reg++) {
                switch (reg) {
                case 7:
                        break;
                default:
                        snd_cs4236_ctrl_out(chip, reg, chip->cimage[reg]);
                }
        }
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        snd_cs4231_mce_down(chip);
}

#endif /* CONFIG_PM */

int snd_cs4236_create(snd_card_t * card,
                      unsigned long port,
                      unsigned long cport,
                      int irq, int dma1, int dma2,
                      unsigned short hardware,
                      unsigned short hwshare,
                      cs4231_t ** rchip)
{
        cs4231_t *chip;
        unsigned char ver1, ver2;
        unsigned int reg;
        int err;

        *rchip = NULL;
        if (hardware == CS4231_HW_DETECT)
                hardware = CS4231_HW_DETECT3;
        if (cport < 0x100) {
                snd_printk("please, specify control port for CS4236+ chips\n");
                return -ENODEV;
        }
        if ((err = snd_cs4231_create(card, port, cport, irq, dma1, dma2, hardware, hwshare, &chip)) < 0)
                return err;

        if (!(chip->hardware & CS4231_HW_CS4236B_MASK)) {
                snd_printk("CS4236+: MODE3 and extended registers not available, hardware=0x%x\n",chip->hardware);
                snd_device_free(card, chip);
                return -ENODEV;
        }
#if 0
        {
                int idx;
                for (idx = 0; idx < 8; idx++)
                        snd_printk("CD%i = 0x%x\n", idx, inb(chip->cport + idx));
                for (idx = 0; idx < 9; idx++)
                        snd_printk("C%i = 0x%x\n", idx, snd_cs4236_ctrl_in(chip, idx));
        }
#endif
        ver1 = snd_cs4236_ctrl_in(chip, 1);
        ver2 = snd_cs4236_ext_in(chip, CS4236_VERSION);
        snd_printdd("CS4236: [0x%lx] C1 (version) = 0x%x, ext = 0x%x\n", cport, ver1, ver2);
        if (ver1 != ver2) {
                snd_printk("CS4236+ chip detected, but control port 0x%lx is not valid\n", cport);
                snd_device_free(card, chip);
                return -ENODEV;
        }
        snd_cs4236_ctrl_out(chip, 0, 0x00);
        snd_cs4236_ctrl_out(chip, 2, 0xff);
        snd_cs4236_ctrl_out(chip, 3, 0x00);
        snd_cs4236_ctrl_out(chip, 4, 0x80);
        snd_cs4236_ctrl_out(chip, 5, ((IEC958_AES1_CON_PCM_CODER & 3) << 6) | IEC958_AES0_CON_EMPHASIS_NONE);
        snd_cs4236_ctrl_out(chip, 6, IEC958_AES1_CON_PCM_CODER >> 2);
        snd_cs4236_ctrl_out(chip, 7, 0x00);
        /* 0x8c for C8 is valid for Turtle Beach Malibu - the IEC-958 output */
        /* is working with this setup, other hardware should have */
        /* different signal paths and this value should be selectable */
        /* in the future */
        snd_cs4236_ctrl_out(chip, 8, 0x8c);
        chip->rate_constraint = snd_cs4236_xrate;
        chip->set_playback_format = snd_cs4236_playback_format;
        chip->set_capture_format = snd_cs4236_capture_format;
#ifdef CONFIG_PM
        chip->suspend = snd_cs4236_suspend;
        chip->resume = snd_cs4236_resume;
#endif

        /* initialize extended registers */
        for (reg = 0; reg < sizeof(snd_cs4236_ext_map); reg++)
                snd_cs4236_ext_out(chip, CS4236_I23VAL(reg), snd_cs4236_ext_map[reg]);

        /* initialize compatible but more featured registers */
        snd_cs4231_out(chip, CS4231_LEFT_INPUT, 0x40);
        snd_cs4231_out(chip, CS4231_RIGHT_INPUT, 0x40);
        snd_cs4231_out(chip, CS4231_AUX1_LEFT_INPUT, 0xff);
        snd_cs4231_out(chip, CS4231_AUX1_RIGHT_INPUT, 0xff);
        snd_cs4231_out(chip, CS4231_AUX2_LEFT_INPUT, 0xdf);
        snd_cs4231_out(chip, CS4231_AUX2_RIGHT_INPUT, 0xdf);
        snd_cs4231_out(chip, CS4231_RIGHT_LINE_IN, 0xff);
        snd_cs4231_out(chip, CS4231_LEFT_LINE_IN, 0xff);
        snd_cs4231_out(chip, CS4231_RIGHT_LINE_IN, 0xff);
        switch (chip->hardware) {
        case CS4231_HW_CS4235:
        case CS4231_HW_CS4239:
                snd_cs4231_out(chip, CS4235_LEFT_MASTER, 0xff);
                snd_cs4231_out(chip, CS4235_RIGHT_MASTER, 0xff);
                break;
        }

        *rchip = chip;
        return 0;
}

int snd_cs4236_pcm(cs4231_t *chip, int device, snd_pcm_t **rpcm)
{
        snd_pcm_t *pcm;
        int err;
        
        if ((err = snd_cs4231_pcm(chip, device, &pcm)) < 0)
                return err;
        pcm->info_flags &= ~SNDRV_PCM_INFO_JOINT_DUPLEX;
        if (rpcm)
                *rpcm = pcm;
        return 0;
}

/*
 *  MIXER
 */

#define CS4236_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_single, \
  .get = snd_cs4236_get_single, .put = snd_cs4236_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_cs4236_info_single(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
        int mask = (kcontrol->private_value >> 16) & 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_cs4236_get_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = (chip->eimage[CS4236_REG(reg)] >> shift) & mask;
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        if (invert)
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
        return 0;
}

static int snd_cs4236_put_single(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        int change;
        unsigned short val;
        
        val = (ucontrol->value.integer.value[0] & mask);
        if (invert)
                val = mask - val;
        val <<= shift;
        spin_lock_irqsave(&chip->reg_lock, flags);
        val = (chip->eimage[CS4236_REG(reg)] & ~(mask << shift)) | val;
        change = val != chip->eimage[CS4236_REG(reg)];
        snd_cs4236_ext_out(chip, reg, val);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

#define CS4236_SINGLEC(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_single, \
  .get = snd_cs4236_get_singlec, .put = snd_cs4236_put_singlec, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_cs4236_get_singlec(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = (chip->cimage[reg] >> shift) & mask;
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        if (invert)
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
        return 0;
}

static int snd_cs4236_put_singlec(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        int change;
        unsigned short val;
        
        val = (ucontrol->value.integer.value[0] & mask);
        if (invert)
                val = mask - val;
        val <<= shift;
        spin_lock_irqsave(&chip->reg_lock, flags);
        val = (chip->cimage[reg] & ~(mask << shift)) | val;
        change = val != chip->cimage[reg];
        snd_cs4236_ctrl_out(chip, reg, val);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

#define CS4236_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_double, \
  .get = snd_cs4236_get_double, .put = snd_cs4236_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_cs4236_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_cs4236_get_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = (chip->eimage[CS4236_REG(left_reg)] >> shift_left) & mask;
        ucontrol->value.integer.value[1] = (chip->eimage[CS4236_REG(right_reg)] >> shift_right) & mask;
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        if (invert) {
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
                ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
        }
        return 0;
}

static int snd_cs4236_put_double(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        int change;
        unsigned short val1, val2;
        
        val1 = ucontrol->value.integer.value[0] & mask;
        val2 = ucontrol->value.integer.value[1] & mask;
        if (invert) {
                val1 = mask - val1;
                val2 = mask - val2;
        }
        val1 <<= shift_left;
        val2 <<= shift_right;
        spin_lock_irqsave(&chip->reg_lock, flags);
        if (left_reg != right_reg) {
                val1 = (chip->eimage[CS4236_REG(left_reg)] & ~(mask << shift_left)) | val1;
                val2 = (chip->eimage[CS4236_REG(right_reg)] & ~(mask << shift_right)) | val2;
                change = val1 != chip->eimage[CS4236_REG(left_reg)] || val2 != chip->eimage[CS4236_REG(right_reg)];
                snd_cs4236_ext_out(chip, left_reg, val1);
                snd_cs4236_ext_out(chip, right_reg, val2);
        } else {
                val1 = (chip->eimage[CS4236_REG(left_reg)] & ~((mask << shift_left) | (mask << shift_right))) | val1 | val2;
                change = val1 != chip->eimage[CS4236_REG(left_reg)];
                snd_cs4236_ext_out(chip, left_reg, val1);
        }
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

#define CS4236_DOUBLE1(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_double, \
  .get = snd_cs4236_get_double1, .put = snd_cs4236_put_double1, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_cs4236_get_double1(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = (chip->image[left_reg] >> shift_left) & mask;
        ucontrol->value.integer.value[1] = (chip->eimage[CS4236_REG(right_reg)] >> shift_right) & mask;
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        if (invert) {
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
                ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
        }
        return 0;
}

static int snd_cs4236_put_double1(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        int change;
        unsigned short val1, val2;
        
        val1 = ucontrol->value.integer.value[0] & mask;
        val2 = ucontrol->value.integer.value[1] & mask;
        if (invert) {
                val1 = mask - val1;
                val2 = mask - val2;
        }
        val1 <<= shift_left;
        val2 <<= shift_right;
        spin_lock_irqsave(&chip->reg_lock, flags);
        val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
        val2 = (chip->eimage[CS4236_REG(right_reg)] & ~(mask << shift_right)) | val2;
        change = val1 != chip->image[left_reg] || val2 != chip->eimage[CS4236_REG(right_reg)];
        snd_cs4231_out(chip, left_reg, val1);
        snd_cs4236_ext_out(chip, right_reg, val2);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

#define CS4236_MASTER_DIGITAL(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_double, \
  .get = snd_cs4236_get_master_digital, .put = snd_cs4236_put_master_digital, \
  .private_value = 71 << 24 }

static inline int snd_cs4236_mixer_master_digital_invert_volume(int vol)
{
        return (vol < 64) ? 63 - vol : 64 + (71 - vol);
}        

static int snd_cs4236_get_master_digital(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = snd_cs4236_mixer_master_digital_invert_volume(chip->eimage[CS4236_REG(CS4236_LEFT_MASTER)] & 0x7f);
        ucontrol->value.integer.value[1] = snd_cs4236_mixer_master_digital_invert_volume(chip->eimage[CS4236_REG(CS4236_RIGHT_MASTER)] & 0x7f);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return 0;
}

static int snd_cs4236_put_master_digital(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int change;
        unsigned short val1, val2;
        
        val1 = snd_cs4236_mixer_master_digital_invert_volume(ucontrol->value.integer.value[0] & 0x7f);
        val2 = snd_cs4236_mixer_master_digital_invert_volume(ucontrol->value.integer.value[1] & 0x7f);
        spin_lock_irqsave(&chip->reg_lock, flags);
        val1 = (chip->eimage[CS4236_REG(CS4236_LEFT_MASTER)] & ~0x7f) | val1;
        val2 = (chip->eimage[CS4236_REG(CS4236_RIGHT_MASTER)] & ~0x7f) | val2;
        change = val1 != chip->eimage[CS4236_REG(CS4236_LEFT_MASTER)] || val2 != chip->eimage[CS4236_REG(CS4236_RIGHT_MASTER)];
        snd_cs4236_ext_out(chip, CS4236_LEFT_MASTER, val1);
        snd_cs4236_ext_out(chip, CS4236_RIGHT_MASTER, val1);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

#define CS4235_OUTPUT_ACCU(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_double, \
  .get = snd_cs4235_get_output_accu, .put = snd_cs4235_put_output_accu, \
  .private_value = 3 << 24 }

static inline int snd_cs4235_mixer_output_accu_get_volume(int vol)
{
        switch ((vol >> 5) & 3) {
        case 0: return 1;
        case 1: return 3;
        case 2: return 2;
        case 3: return 0;
        }
        return 3;
}

static inline int snd_cs4235_mixer_output_accu_set_volume(int vol)
{
        switch (vol & 3) {
        case 0: return 3 << 5;
        case 1: return 0 << 5;
        case 2: return 2 << 5;
        case 3: return 1 << 5;
        }
        return 1 << 5;
}

static int snd_cs4235_get_output_accu(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = snd_cs4235_mixer_output_accu_get_volume(chip->image[CS4235_LEFT_MASTER]);
        ucontrol->value.integer.value[1] = snd_cs4235_mixer_output_accu_get_volume(chip->image[CS4235_RIGHT_MASTER]);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return 0;
}

static int snd_cs4235_put_output_accu(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int change;
        unsigned short val1, val2;
        
        val1 = snd_cs4235_mixer_output_accu_set_volume(ucontrol->value.integer.value[0]);
        val2 = snd_cs4235_mixer_output_accu_set_volume(ucontrol->value.integer.value[1]);
        spin_lock_irqsave(&chip->reg_lock, flags);
        val1 = (chip->image[CS4235_LEFT_MASTER] & ~(3 << 5)) | val1;
        val2 = (chip->image[CS4235_RIGHT_MASTER] & ~(3 << 5)) | val2;
        change = val1 != chip->image[CS4235_LEFT_MASTER] || val2 != chip->image[CS4235_RIGHT_MASTER];
        snd_cs4231_out(chip, CS4235_LEFT_MASTER, val1);
        snd_cs4231_out(chip, CS4235_RIGHT_MASTER, val2);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return change;
}

static snd_kcontrol_new_t snd_cs4236_controls[] = {

CS4236_DOUBLE("Master Digital Playback Switch", 0, CS4236_LEFT_MASTER, CS4236_RIGHT_MASTER, 7, 7, 1, 1),
CS4236_DOUBLE("Master Digital Capture Switch", 0, CS4236_DAC_MUTE, CS4236_DAC_MUTE, 7, 6, 1, 1),
CS4236_MASTER_DIGITAL("Master Digital Volume", 0),

CS4236_DOUBLE("Capture Boost Volume", 0, CS4236_LEFT_MIX_CTRL, CS4236_RIGHT_MIX_CTRL, 5, 5, 3, 1),

CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),

CS4236_DOUBLE("DSP Playback Switch", 0, CS4236_LEFT_DSP, CS4236_RIGHT_DSP, 7, 7, 1, 1),
CS4236_DOUBLE("DSP Playback Volume", 0, CS4236_LEFT_DSP, CS4236_RIGHT_DSP, 0, 0, 63, 1),

CS4236_DOUBLE("FM Playback Switch", 0, CS4236_LEFT_FM, CS4236_RIGHT_FM, 7, 7, 1, 1),
CS4236_DOUBLE("FM Playback Volume", 0, CS4236_LEFT_FM, CS4236_RIGHT_FM, 0, 0, 63, 1),

CS4236_DOUBLE("Wavetable Playback Switch", 0, CS4236_LEFT_WAVE, CS4236_RIGHT_WAVE, 7, 7, 1, 1),
CS4236_DOUBLE("Wavetable Playback Volume", 0, CS4236_LEFT_WAVE, CS4236_RIGHT_WAVE, 0, 0, 63, 1),

CS4231_DOUBLE("Synth Playback Switch", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
CS4231_DOUBLE("Synth Volume", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
CS4231_DOUBLE("Synth Capture Switch", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 6, 6, 1, 1),
CS4231_DOUBLE("Synth Capture Bypass", 0, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 5, 5, 1, 1),

CS4236_DOUBLE("Mic Playback Switch", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 6, 6, 1, 1),
CS4236_DOUBLE("Mic Capture Switch", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 7, 7, 1, 1),
CS4236_DOUBLE("Mic Volume", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 0, 0, 31, 1),
CS4236_DOUBLE("Mic Playback Boost", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 5, 5, 1, 0),

CS4231_DOUBLE("Line Playback Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Line Volume", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_DOUBLE("Line Capture Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 6, 6, 1, 1),
CS4231_DOUBLE("Line Capture Bypass", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 5, 5, 1, 1),

CS4231_DOUBLE("CD Playback Switch", 0, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("CD Volume", 0, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_DOUBLE("CD Capture Switch", 0, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 6, 6, 1, 1),

CS4236_DOUBLE1("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, CS4236_RIGHT_MIX_CTRL, 6, 7, 1, 1),
CS4236_DOUBLE1("Mono Playback Switch", 0, CS4231_MONO_CTRL, CS4236_LEFT_MIX_CTRL, 7, 7, 1, 1),
CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
CS4231_SINGLE("Mono Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),

CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0, 15, 0),
CS4231_DOUBLE("Analog Loopback Capture Switch", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 7, 7, 1, 0),

CS4231_SINGLE("Digital Loopback Playback Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
CS4236_DOUBLE1("Digital Loopback Playback Volume", 0, CS4231_LOOPBACK, CS4236_RIGHT_LOOPBACK, 2, 0, 63, 1)
};

static snd_kcontrol_new_t snd_cs4235_controls[] = {

CS4231_DOUBLE("Master Switch", 0, CS4235_LEFT_MASTER, CS4235_RIGHT_MASTER, 7, 7, 1, 1),
CS4231_DOUBLE("Master Volume", 0, CS4235_LEFT_MASTER, CS4235_RIGHT_MASTER, 0, 0, 31, 1),

CS4235_OUTPUT_ACCU("Playback Volume", 0),

CS4236_DOUBLE("Master Digital Playback Switch", 0, CS4236_LEFT_MASTER, CS4236_RIGHT_MASTER, 7, 7, 1, 1),
CS4236_DOUBLE("Master Digital Capture Switch", 0, CS4236_DAC_MUTE, CS4236_DAC_MUTE, 7, 6, 1, 1),
CS4236_MASTER_DIGITAL("Master Digital Volume", 0),

CS4231_DOUBLE("Master Digital Playback Switch", 1, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
CS4231_DOUBLE("Master Digital Capture Switch", 1, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 6, 6, 1, 1),
CS4231_DOUBLE("Master Digital Volume", 1, CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),

CS4236_DOUBLE("Capture Volume", 0, CS4236_LEFT_MIX_CTRL, CS4236_RIGHT_MIX_CTRL, 5, 5, 3, 1),

CS4231_DOUBLE("PCM Switch", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
CS4231_DOUBLE("PCM Volume", 0, CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),

CS4236_DOUBLE("DSP Switch", 0, CS4236_LEFT_DSP, CS4236_RIGHT_DSP, 7, 7, 1, 1),

CS4236_DOUBLE("FM Switch", 0, CS4236_LEFT_FM, CS4236_RIGHT_FM, 7, 7, 1, 1),

CS4236_DOUBLE("Wavetable Switch", 0, CS4236_LEFT_WAVE, CS4236_RIGHT_WAVE, 7, 7, 1, 1),

CS4236_DOUBLE("Mic Capture Switch", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 7, 7, 1, 1),
CS4236_DOUBLE("Mic Playback Switch", 0, CS4236_LEFT_MIC, CS4236_RIGHT_MIC, 6, 6, 1, 1),
CS4236_SINGLE("Mic Volume", 0, CS4236_LEFT_MIC, 0, 31, 1),
CS4236_SINGLE("Mic Playback Boost", 0, CS4236_LEFT_MIC, 5, 1, 0),

CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Capture Switch", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 6, 6, 1, 1),
CS4231_DOUBLE("Aux Volume", 0, CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),

CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Capture Switch", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 6, 6, 1, 1),
CS4231_DOUBLE("Aux Volume", 1, CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),

CS4236_DOUBLE1("Master Mono Switch", 0, CS4231_MONO_CTRL, CS4236_RIGHT_MIX_CTRL, 6, 7, 1, 1),

CS4236_DOUBLE1("Mono Switch", 0, CS4231_MONO_CTRL, CS4236_LEFT_MIX_CTRL, 7, 7, 1, 1),
CS4231_SINGLE("Mono Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),

CS4231_DOUBLE("Analog Loopback Switch", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 7, 7, 1, 0),
};

#define CS4236_IEC958_ENABLE(xname, xindex) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_cs4236_info_single, \
  .get = snd_cs4236_get_iec958_switch, .put = snd_cs4236_put_iec958_switch, \
  .private_value = 1 << 16 }

static int snd_cs4236_get_iec958_switch(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ucontrol->value.integer.value[0] = chip->image[CS4231_ALT_FEATURE_1] & 0x02 ? 1 : 0;
#if 0
        printk("get valid: ALT = 0x%x, C3 = 0x%x, C4 = 0x%x, C5 = 0x%x, C6 = 0x%x, C8 = 0x%x\n",
                        snd_cs4231_in(chip, CS4231_ALT_FEATURE_1),
                        snd_cs4236_ctrl_in(chip, 3),
                        snd_cs4236_ctrl_in(chip, 4),
                        snd_cs4236_ctrl_in(chip, 5),
                        snd_cs4236_ctrl_in(chip, 6),
                        snd_cs4236_ctrl_in(chip, 8));
#endif
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return 0;
}

static int snd_cs4236_put_iec958_switch(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
        cs4231_t *chip = snd_kcontrol_chip(kcontrol);
        unsigned long flags;
        int change;
        unsigned short enable, val;
        
        enable = ucontrol->value.integer.value[0] & 1;

        down(&chip->mce_mutex);
        snd_cs4231_mce_up(chip);
        spin_lock_irqsave(&chip->reg_lock, flags);
        val = (chip->image[CS4231_ALT_FEATURE_1] & ~0x0e) | (0<<2) | (enable << 1);
        change = val != chip->image[CS4231_ALT_FEATURE_1];
        snd_cs4231_out(chip, CS4231_ALT_FEATURE_1, val);
        val = snd_cs4236_ctrl_in(chip, 4) | 0xc0;
        snd_cs4236_ctrl_out(chip, 4, val);
        udelay(100);
        val &= ~0x40;
        snd_cs4236_ctrl_out(chip, 4, val);
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        snd_cs4231_mce_down(chip);
        up(&chip->mce_mutex);

#if 0
        printk("set valid: ALT = 0x%x, C3 = 0x%x, C4 = 0x%x, C5 = 0x%x, C6 = 0x%x, C8 = 0x%x\n",
                        snd_cs4231_in(chip, CS4231_ALT_FEATURE_1),
                        snd_cs4236_ctrl_in(chip, 3),
                        snd_cs4236_ctrl_in(chip, 4),
                        snd_cs4236_ctrl_in(chip, 5),
                        snd_cs4236_ctrl_in(chip, 6),
                        snd_cs4236_ctrl_in(chip, 8));
#endif
        return change;
}

static snd_kcontrol_new_t snd_cs4236_iec958_controls[] = {
CS4236_IEC958_ENABLE("IEC958 Output Enable", 0),
CS4236_SINGLEC("IEC958 Output Validity", 0, 4, 4, 1, 0),
CS4236_SINGLEC("IEC958 Output User", 0, 4, 5, 1, 0),
CS4236_SINGLEC("IEC958 Output CSBR", 0, 4, 6, 1, 0),
CS4236_SINGLEC("IEC958 Output Channel Status Low", 0, 5, 1, 127, 0),
CS4236_SINGLEC("IEC958 Output Channel Status High", 0, 6, 0, 255, 0)
};

static snd_kcontrol_new_t snd_cs4236_3d_controls_cs4235[] = {
CS4236_SINGLEC("3D Control - Switch", 0, 3, 4, 1, 0),
CS4236_SINGLEC("3D Control - Space", 0, 2, 4, 15, 1)
};

static snd_kcontrol_new_t snd_cs4236_3d_controls_cs4237[] = {
CS4236_SINGLEC("3D Control - Switch", 0, 3, 7, 1, 0),
CS4236_SINGLEC("3D Control - Space", 0, 2, 4, 15, 1),
CS4236_SINGLEC("3D Control - Center", 0, 2, 0, 15, 1),
CS4236_SINGLEC("3D Control - Mono", 0, 3, 6, 1, 0),
CS4236_SINGLEC("3D Control - IEC958", 0, 3, 5, 1, 0)
};

static snd_kcontrol_new_t snd_cs4236_3d_controls_cs4238[] = {
CS4236_SINGLEC("3D Control - Switch", 0, 3, 4, 1, 0),
CS4236_SINGLEC("3D Control - Space", 0, 2, 4, 15, 1),
CS4236_SINGLEC("3D Control - Volume", 0, 2, 0, 15, 1),
CS4236_SINGLEC("3D Control - IEC958", 0, 3, 5, 1, 0)
};

int snd_cs4236_mixer(cs4231_t *chip)
{
        snd_card_t *card;
        unsigned int idx, count;
        int err;
        snd_kcontrol_new_t *kcontrol;

        snd_assert(chip != NULL && chip->card != NULL, return -EINVAL);
        card = chip->card;
        strcpy(card->mixername, snd_cs4231_chip_id(chip));

        if (chip->hardware == CS4231_HW_CS4235 ||
            chip->hardware == CS4231_HW_CS4239) {
                for (idx = 0; idx < ARRAY_SIZE(snd_cs4235_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4235_controls[idx], chip))) < 0)
                                return err;
                }
        } else {
                for (idx = 0; idx < ARRAY_SIZE(snd_cs4236_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4236_controls[idx], chip))) < 0)
                                return err;
                }
        }
        switch (chip->hardware) {
        case CS4231_HW_CS4235:
        case CS4231_HW_CS4239:
                count = ARRAY_SIZE(snd_cs4236_3d_controls_cs4235);
                kcontrol = snd_cs4236_3d_controls_cs4235;
                break;
        case CS4231_HW_CS4237B:
                count = ARRAY_SIZE(snd_cs4236_3d_controls_cs4237);
                kcontrol = snd_cs4236_3d_controls_cs4237;
                break;
        case CS4231_HW_CS4238B:
                count = ARRAY_SIZE(snd_cs4236_3d_controls_cs4238);
                kcontrol = snd_cs4236_3d_controls_cs4238;
                break;
        default:
                count = 0;
                kcontrol = NULL;
        }
        for (idx = 0; idx < count; idx++, kcontrol++) {
                if ((err = snd_ctl_add(card, snd_ctl_new1(kcontrol, chip))) < 0)
                        return err;
        }
        if (chip->hardware == CS4231_HW_CS4237B ||
            chip->hardware == CS4231_HW_CS4238B) {
                for (idx = 0; idx < ARRAY_SIZE(snd_cs4236_iec958_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4236_iec958_controls[idx], chip))) < 0)
                                return err;
                }
        }
        return 0;
}

EXPORT_SYMBOL(snd_cs4236_create);
EXPORT_SYMBOL(snd_cs4236_pcm);
EXPORT_SYMBOL(snd_cs4236_mixer);

/*
 *  INIT part
 */

static int __init alsa_cs4236_init(void)
{
        return 0;
}

static void __exit alsa_cs4236_exit(void)
{
}

module_init(alsa_cs4236_init)
module_exit(alsa_cs4236_exit)