/*
 *  Driver for generic ESS AudioDrive ES18xx soundcards
 *  Copyright (c) by Christian Fischbach <fishbach@pool.informatik.rwth-aachen.de>
 *  Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
 *
 *
 *   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
 *
 */
/* GENERAL NOTES:
 *
 * BUGS:
 * - There are pops (we can't delay in trigger function, cause midlevel 
 *   often need to trigger down and then up very quickly).
 *   Any ideas?
 * - Support for 16 bit DMA seems to be broken. I've no hardware to tune it.
 */

/*
 * ES1868  NOTES:
 * - The chip has one half duplex pcm (with very limited full duplex support).
 *
 * - Duplex stereophonic sound is impossible.
 * - Record and playback must share the same frequency rate.
 *
 * - The driver use dma2 for playback and dma1 for capture.
 */

/*
 * ES1869 NOTES:
 *
 * - there are a first full duplex pcm and a second playback only pcm
 *   (incompatible with first pcm capture)
 * 
 * - there is support for the capture volume and ESS Spatializer 3D effect.
 *
 * - contrarily to some pages in DS_1869.PDF the rates can be set
 *   independently.
 *
 * - Zoom Video is implemented by sharing the FM DAC, thus the user can
 *   have either FM playback or Video playback but not both simultaneously.
 *   The Video Playback Switch mixer control toggles this choice.
 *
 * BUGS:
 *
 * - There is a major trouble I noted:
 *
 *   using both channel for playback stereo 16 bit samples at 44100 Hz
 *   the second pcm (Audio1) DMA slows down irregularly and sound is garbled.
 *   
 *   The same happens using Audio1 for captureing.
 *
 *   The Windows driver does not suffer of this (although it use Audio1
 *   only for captureing). I'm unable to discover why.
 *
 */

/*
 * ES1879 NOTES:
 * - When Zoom Video is enabled (reg 0x71 bit 6 toggled on) the PCM playback
 *   seems to be effected (speaker_test plays a lower frequency). Can't find
 *   anything in the datasheet to account for this, so a Video Playback Switch
 *   control has been included to allow ZV to be enabled only when necessary.
 *   Then again on at least one test system the 0x71 bit 6 enable bit is not 
 *   needed for ZV, so maybe the datasheet is entirely wrong here.
 */
 
#include <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/pnp.h>
#include <linux/isapnp.h>
#include <linux/module.h>
#include <linux/delay.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/mpu401.h>
#include <sound/opl3.h>
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

#define PFX "es18xx: "

struct snd_es18xx {
        unsigned long port;             /* port of ESS chip */
        unsigned long ctrl_port;        /* Control port of ESS chip */
        struct resource *res_port;
        struct resource *res_mpu_port;
        struct resource *res_ctrl_port;
        int irq;                        /* IRQ number of ESS chip */
        int dma1;                       /* DMA1 */
        int dma2;                       /* DMA2 */
        unsigned short version;         /* version of ESS chip */
        int caps;                       /* Chip capabilities */
        unsigned short audio2_vol;      /* volume level of audio2 */

        unsigned short active;          /* active channel mask */
        unsigned int dma1_shift;
        unsigned int dma2_shift;

        struct snd_pcm *pcm;
        struct snd_pcm_substream *playback_a_substream;
        struct snd_pcm_substream *capture_a_substream;
        struct snd_pcm_substream *playback_b_substream;

        struct snd_rawmidi *rmidi;

        struct snd_kcontrol *hw_volume;
        struct snd_kcontrol *hw_switch;
        struct snd_kcontrol *master_volume;
        struct snd_kcontrol *master_switch;

        spinlock_t reg_lock;
        spinlock_t mixer_lock;
#ifdef CONFIG_PM
        unsigned char pm_reg;
#endif
#ifdef CONFIG_PNP
        struct pnp_dev *dev;
        struct pnp_dev *devc;
#endif
};

#define AUDIO1_IRQ      0x01
#define AUDIO2_IRQ      0x02
#define HWV_IRQ         0x04
#define MPU_IRQ         0x08

#define ES18XX_PCM2     0x0001  /* Has two useable PCM */
#define ES18XX_SPATIALIZER 0x0002       /* Has 3D Spatializer */
#define ES18XX_RECMIX   0x0004  /* Has record mixer */
#define ES18XX_DUPLEX_MONO 0x0008       /* Has mono duplex only */
#define ES18XX_DUPLEX_SAME 0x0010       /* Playback and record must share the same rate */
#define ES18XX_NEW_RATE 0x0020  /* More precise rate setting */
#define ES18XX_AUXB     0x0040  /* AuxB mixer control */
#define ES18XX_HWV      0x0080  /* Has separate hardware volume mixer controls*/
#define ES18XX_MONO     0x0100  /* Mono_in mixer control */
#define ES18XX_I2S      0x0200  /* I2S mixer control */
#define ES18XX_MUTEREC  0x0400  /* Record source can be muted */
#define ES18XX_CONTROL  0x0800  /* Has control ports */

/* Power Management */
#define ES18XX_PM       0x07
#define ES18XX_PM_GPO0  0x01
#define ES18XX_PM_GPO1  0x02
#define ES18XX_PM_PDR   0x04
#define ES18XX_PM_ANA   0x08
#define ES18XX_PM_FM    0x020
#define ES18XX_PM_SUS   0x080

/* Lowlevel */

#define DAC1 0x01
#define ADC1 0x02
#define DAC2 0x04
#define MILLISECOND 10000

static int snd_es18xx_dsp_command(struct snd_es18xx *chip, unsigned char val)
{
        int i;

        for(i = MILLISECOND; i; i--)
                if ((inb(chip->port + 0x0C) & 0x80) == 0) {
                        outb(val, chip->port + 0x0C);
                        return 0;
                }
        snd_printk(KERN_ERR "dsp_command: timeout (0x%x)\n", val);
        return -EINVAL;
}

static int snd_es18xx_dsp_get_byte(struct snd_es18xx *chip)
{
        int i;

        for(i = MILLISECOND/10; i; i--)
                if (inb(chip->port + 0x0C) & 0x40)
                        return inb(chip->port + 0x0A);
        snd_printk(KERN_ERR "dsp_get_byte failed: 0x%lx = 0x%x!!!\n",
                   chip->port + 0x0A, inb(chip->port + 0x0A));
        return -ENODEV;
}

#undef REG_DEBUG

static int snd_es18xx_write(struct snd_es18xx *chip,
                            unsigned char reg, unsigned char data)
{
        unsigned long flags;
        int ret;
        
        spin_lock_irqsave(&chip->reg_lock, flags);
        ret = snd_es18xx_dsp_command(chip, reg);
        if (ret < 0)
                goto end;
        ret = snd_es18xx_dsp_command(chip, data);
 end:
        spin_unlock_irqrestore(&chip->reg_lock, flags);
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Reg %02x set to %02x\n", reg, data);
#endif
        return ret;
}

static int snd_es18xx_read(struct snd_es18xx *chip, unsigned char reg)
{
        unsigned long flags;
        int ret, data;
        spin_lock_irqsave(&chip->reg_lock, flags);
        ret = snd_es18xx_dsp_command(chip, 0xC0);
        if (ret < 0)
                goto end;
        ret = snd_es18xx_dsp_command(chip, reg);
        if (ret < 0)
                goto end;
        data = snd_es18xx_dsp_get_byte(chip);
        ret = data;
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Reg %02x now is %02x (%d)\n", reg, data, ret);
#endif
 end:
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return ret;
}

/* Return old value */
static int snd_es18xx_bits(struct snd_es18xx *chip, unsigned char reg,
                           unsigned char mask, unsigned char val)
{
        int ret;
        unsigned char old, new, oval;
        unsigned long flags;
        spin_lock_irqsave(&chip->reg_lock, flags);
        ret = snd_es18xx_dsp_command(chip, 0xC0);
        if (ret < 0)
                goto end;
        ret = snd_es18xx_dsp_command(chip, reg);
        if (ret < 0)
                goto end;
        ret = snd_es18xx_dsp_get_byte(chip);
        if (ret < 0) {
                goto end;
        }
        old = ret;
        oval = old & mask;
        if (val != oval) {
                ret = snd_es18xx_dsp_command(chip, reg);
                if (ret < 0)
                        goto end;
                new = (old & ~mask) | (val & mask);
                ret = snd_es18xx_dsp_command(chip, new);
                if (ret < 0)
                        goto end;
#ifdef REG_DEBUG
                snd_printk(KERN_DEBUG "Reg %02x was %02x, set to %02x (%d)\n",
                           reg, old, new, ret);
#endif
        }
        ret = oval;
 end:
        spin_unlock_irqrestore(&chip->reg_lock, flags);
        return ret;
}

static inline void snd_es18xx_mixer_write(struct snd_es18xx *chip,
                            unsigned char reg, unsigned char data)
{
        unsigned long flags;
        spin_lock_irqsave(&chip->mixer_lock, flags);
        outb(reg, chip->port + 0x04);
        outb(data, chip->port + 0x05);
        spin_unlock_irqrestore(&chip->mixer_lock, flags);
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Mixer reg %02x set to %02x\n", reg, data);
#endif
}

static inline int snd_es18xx_mixer_read(struct snd_es18xx *chip, unsigned char reg)
{
        unsigned long flags;
        int data;
        spin_lock_irqsave(&chip->mixer_lock, flags);
        outb(reg, chip->port + 0x04);
        data = inb(chip->port + 0x05);
        spin_unlock_irqrestore(&chip->mixer_lock, flags);
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Mixer reg %02x now is %02x\n", reg, data);
#endif
        return data;
}

/* Return old value */
static inline int snd_es18xx_mixer_bits(struct snd_es18xx *chip, unsigned char reg,
                                        unsigned char mask, unsigned char val)
{
        unsigned char old, new, oval;
        unsigned long flags;
        spin_lock_irqsave(&chip->mixer_lock, flags);
        outb(reg, chip->port + 0x04);
        old = inb(chip->port + 0x05);
        oval = old & mask;
        if (val != oval) {
                new = (old & ~mask) | (val & mask);
                outb(new, chip->port + 0x05);
#ifdef REG_DEBUG
                snd_printk(KERN_DEBUG "Mixer reg %02x was %02x, set to %02x\n",
                           reg, old, new);
#endif
        }
        spin_unlock_irqrestore(&chip->mixer_lock, flags);
        return oval;
}

static inline int snd_es18xx_mixer_writable(struct snd_es18xx *chip, unsigned char reg,
                                            unsigned char mask)
{
        int old, expected, new;
        unsigned long flags;
        spin_lock_irqsave(&chip->mixer_lock, flags);
        outb(reg, chip->port + 0x04);
        old = inb(chip->port + 0x05);
        expected = old ^ mask;
        outb(expected, chip->port + 0x05);
        new = inb(chip->port + 0x05);
        spin_unlock_irqrestore(&chip->mixer_lock, flags);
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Mixer reg %02x was %02x, set to %02x, now is %02x\n",
                   reg, old, expected, new);
#endif
        return expected == new;
}


static int snd_es18xx_reset(struct snd_es18xx *chip)
{
        int i;
        outb(0x03, chip->port + 0x06);
        inb(chip->port + 0x06);
        outb(0x00, chip->port + 0x06);
        for(i = 0; i < MILLISECOND && !(inb(chip->port + 0x0E) & 0x80); i++);
        if (inb(chip->port + 0x0A) != 0xAA)
                return -1;
        return 0;
}

static int snd_es18xx_reset_fifo(struct snd_es18xx *chip)
{
        outb(0x02, chip->port + 0x06);
        inb(chip->port + 0x06);
        outb(0x00, chip->port + 0x06);
        return 0;
}

static struct snd_ratnum new_clocks[2] = {
        {
                .num = 793800,
                .den_min = 1,
                .den_max = 128,
                .den_step = 1,
        },
        {
                .num = 768000,
                .den_min = 1,
                .den_max = 128,
                .den_step = 1,
        }
};

static struct snd_pcm_hw_constraint_ratnums new_hw_constraints_clocks = {
        .nrats = 2,
        .rats = new_clocks,
};

static struct snd_ratnum old_clocks[2] = {
        {
                .num = 795444,
                .den_min = 1,
                .den_max = 128,
                .den_step = 1,
        },
        {
                .num = 397722,
                .den_min = 1,
                .den_max = 128,
                .den_step = 1,
        }
};

static struct snd_pcm_hw_constraint_ratnums old_hw_constraints_clocks  = {
        .nrats = 2,
        .rats = old_clocks,
};


static void snd_es18xx_rate_set(struct snd_es18xx *chip, 
                                struct snd_pcm_substream *substream,
                                int mode)
{
        unsigned int bits, div0;
        struct snd_pcm_runtime *runtime = substream->runtime;
        if (chip->caps & ES18XX_NEW_RATE) {
                if (runtime->rate_num == new_clocks[0].num)
                        bits = 128 - runtime->rate_den;
                else
                        bits = 256 - runtime->rate_den;
        } else {
                if (runtime->rate_num == old_clocks[0].num)
                        bits = 256 - runtime->rate_den;
                else
                        bits = 128 - runtime->rate_den;
        }

        /* set filter register */
        div0 = 256 - 7160000*20/(8*82*runtime->rate);
                
        if ((chip->caps & ES18XX_PCM2) && mode == DAC2) {
                snd_es18xx_mixer_write(chip, 0x70, bits);
                /*
                 * Comment from kernel oss driver:
                 * FKS: fascinating: 0x72 doesn't seem to work.
                 */
                snd_es18xx_write(chip, 0xA2, div0);
                snd_es18xx_mixer_write(chip, 0x72, div0);
        } else {
                snd_es18xx_write(chip, 0xA1, bits);
                snd_es18xx_write(chip, 0xA2, div0);
        }
}

static int snd_es18xx_playback_hw_params(struct snd_pcm_substream *substream,
                                         struct snd_pcm_hw_params *hw_params)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        int shift, err;

        shift = 0;
        if (params_channels(hw_params) == 2)
                shift++;
        if (snd_pcm_format_width(params_format(hw_params)) == 16)
                shift++;

        if (substream->number == 0 && (chip->caps & ES18XX_PCM2)) {
                if ((chip->caps & ES18XX_DUPLEX_MONO) &&
                    (chip->capture_a_substream) &&
                    params_channels(hw_params) != 1) {
                        _snd_pcm_hw_param_setempty(hw_params, SNDRV_PCM_HW_PARAM_CHANNELS);
                        return -EBUSY;
                }
                chip->dma2_shift = shift;
        } else {
                chip->dma1_shift = shift;
        }
        if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
                return err;
        return 0;
}

static int snd_es18xx_pcm_hw_free(struct snd_pcm_substream *substream)
{
        return snd_pcm_lib_free_pages(substream);
}

static int snd_es18xx_playback1_prepare(struct snd_es18xx *chip,
                                        struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        unsigned int count = snd_pcm_lib_period_bytes(substream);

        snd_es18xx_rate_set(chip, substream, DAC2);

        /* Transfer Count Reload */
        count = 0x10000 - count;
        snd_es18xx_mixer_write(chip, 0x74, count & 0xff);
        snd_es18xx_mixer_write(chip, 0x76, count >> 8);

        /* Set format */
        snd_es18xx_mixer_bits(chip, 0x7A, 0x07,
                              ((runtime->channels == 1) ? 0x00 : 0x02) |
                              (snd_pcm_format_width(runtime->format) == 16 ? 0x01 : 0x00) |
                              (snd_pcm_format_unsigned(runtime->format) ? 0x00 : 0x04));

        /* Set DMA controller */
        snd_dma_program(chip->dma2, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);

        return 0;
}

static int snd_es18xx_playback1_trigger(struct snd_es18xx *chip,
                                        struct snd_pcm_substream *substream,
                                        int cmd)
{
        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                if (chip->active & DAC2)
                        return 0;
                chip->active |= DAC2;
                /* Start DMA */
                if (chip->dma2 >= 4)
                        snd_es18xx_mixer_write(chip, 0x78, 0xb3);
                else
                        snd_es18xx_mixer_write(chip, 0x78, 0x93);
#ifdef AVOID_POPS
                /* Avoid pops */
                udelay(100000);
                if (chip->caps & ES18XX_PCM2)
                        /* Restore Audio 2 volume */
                        snd_es18xx_mixer_write(chip, 0x7C, chip->audio2_vol);
                else
                        /* Enable PCM output */
                        snd_es18xx_dsp_command(chip, 0xD1);
#endif
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
                if (!(chip->active & DAC2))
                        return 0;
                chip->active &= ~DAC2;
                /* Stop DMA */
                snd_es18xx_mixer_write(chip, 0x78, 0x00);
#ifdef AVOID_POPS
                udelay(25000);
                if (chip->caps & ES18XX_PCM2)
                        /* Set Audio 2 volume to 0 */
                        snd_es18xx_mixer_write(chip, 0x7C, 0);
                else
                        /* Disable PCM output */
                        snd_es18xx_dsp_command(chip, 0xD3);
#endif
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int snd_es18xx_capture_hw_params(struct snd_pcm_substream *substream,
                                        struct snd_pcm_hw_params *hw_params)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        int shift, err;

        shift = 0;
        if ((chip->caps & ES18XX_DUPLEX_MONO) &&
            chip->playback_a_substream &&
            params_channels(hw_params) != 1) {
                _snd_pcm_hw_param_setempty(hw_params, SNDRV_PCM_HW_PARAM_CHANNELS);
                return -EBUSY;
        }
        if (params_channels(hw_params) == 2)
                shift++;
        if (snd_pcm_format_width(params_format(hw_params)) == 16)
                shift++;
        chip->dma1_shift = shift;
        if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
                return err;
        return 0;
}

static int snd_es18xx_capture_prepare(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        unsigned int count = snd_pcm_lib_period_bytes(substream);

        snd_es18xx_reset_fifo(chip);

        /* Set stereo/mono */
        snd_es18xx_bits(chip, 0xA8, 0x03, runtime->channels == 1 ? 0x02 : 0x01);

        snd_es18xx_rate_set(chip, substream, ADC1);

        /* Transfer Count Reload */
        count = 0x10000 - count;
        snd_es18xx_write(chip, 0xA4, count & 0xff);
        snd_es18xx_write(chip, 0xA5, count >> 8);

#ifdef AVOID_POPS
        udelay(100000);
#endif

        /* Set format */
        snd_es18xx_write(chip, 0xB7, 
                         snd_pcm_format_unsigned(runtime->format) ? 0x51 : 0x71);
        snd_es18xx_write(chip, 0xB7, 0x90 |
                         ((runtime->channels == 1) ? 0x40 : 0x08) |
                         (snd_pcm_format_width(runtime->format) == 16 ? 0x04 : 0x00) |
                         (snd_pcm_format_unsigned(runtime->format) ? 0x00 : 0x20));

        /* Set DMA controller */
        snd_dma_program(chip->dma1, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);

        return 0;
}

static int snd_es18xx_capture_trigger(struct snd_pcm_substream *substream,
                                      int cmd)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                if (chip->active & ADC1)
                        return 0;
                chip->active |= ADC1;
                /* Start DMA */
                snd_es18xx_write(chip, 0xB8, 0x0f);
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
                if (!(chip->active & ADC1))
                        return 0;
                chip->active &= ~ADC1;
                /* Stop DMA */
                snd_es18xx_write(chip, 0xB8, 0x00);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int snd_es18xx_playback2_prepare(struct snd_es18xx *chip,
                                        struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        unsigned int count = snd_pcm_lib_period_bytes(substream);

        snd_es18xx_reset_fifo(chip);

        /* Set stereo/mono */
        snd_es18xx_bits(chip, 0xA8, 0x03, runtime->channels == 1 ? 0x02 : 0x01);

        snd_es18xx_rate_set(chip, substream, DAC1);

        /* Transfer Count Reload */
        count = 0x10000 - count;
        snd_es18xx_write(chip, 0xA4, count & 0xff);
        snd_es18xx_write(chip, 0xA5, count >> 8);

        /* Set format */
        snd_es18xx_write(chip, 0xB6,
                         snd_pcm_format_unsigned(runtime->format) ? 0x80 : 0x00);
        snd_es18xx_write(chip, 0xB7, 
                         snd_pcm_format_unsigned(runtime->format) ? 0x51 : 0x71);
        snd_es18xx_write(chip, 0xB7, 0x90 |
                         (runtime->channels == 1 ? 0x40 : 0x08) |
                         (snd_pcm_format_width(runtime->format) == 16 ? 0x04 : 0x00) |
                         (snd_pcm_format_unsigned(runtime->format) ? 0x00 : 0x20));

        /* Set DMA controller */
        snd_dma_program(chip->dma1, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);

        return 0;
}

static int snd_es18xx_playback2_trigger(struct snd_es18xx *chip,
                                        struct snd_pcm_substream *substream,
                                        int cmd)
{
        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                if (chip->active & DAC1)
                        return 0;
                chip->active |= DAC1;
                /* Start DMA */
                snd_es18xx_write(chip, 0xB8, 0x05);
#ifdef AVOID_POPS
                /* Avoid pops */
                udelay(100000);
                /* Enable Audio 1 */
                snd_es18xx_dsp_command(chip, 0xD1);
#endif
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
                if (!(chip->active & DAC1))
                        return 0;
                chip->active &= ~DAC1;
                /* Stop DMA */
                snd_es18xx_write(chip, 0xB8, 0x00);
#ifdef AVOID_POPS
                /* Avoid pops */
                udelay(25000);
                /* Disable Audio 1 */
                snd_es18xx_dsp_command(chip, 0xD3);
#endif
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int snd_es18xx_playback_prepare(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        if (substream->number == 0 && (chip->caps & ES18XX_PCM2))
                return snd_es18xx_playback1_prepare(chip, substream);
        else
                return snd_es18xx_playback2_prepare(chip, substream);
}

static int snd_es18xx_playback_trigger(struct snd_pcm_substream *substream,
                                       int cmd)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        if (substream->number == 0 && (chip->caps & ES18XX_PCM2))
                return snd_es18xx_playback1_trigger(chip, substream, cmd);
        else
                return snd_es18xx_playback2_trigger(chip, substream, cmd);
}

static irqreturn_t snd_es18xx_interrupt(int irq, void *dev_id)
{
        struct snd_card *card = dev_id;
        struct snd_es18xx *chip = card->private_data;
        unsigned char status;

        if (chip->caps & ES18XX_CONTROL) {
                /* Read Interrupt status */
                status = inb(chip->ctrl_port + 6);
        } else {
                /* Read Interrupt status */
                status = snd_es18xx_mixer_read(chip, 0x7f) >> 4;
        }
#if 0
        else {
                status = 0;
                if (inb(chip->port + 0x0C) & 0x01)
                        status |= AUDIO1_IRQ;
                if (snd_es18xx_mixer_read(chip, 0x7A) & 0x80)
                        status |= AUDIO2_IRQ;
                if ((chip->caps & ES18XX_HWV) &&
                    snd_es18xx_mixer_read(chip, 0x64) & 0x10)
                        status |= HWV_IRQ;
        }
#endif

        /* Audio 1 & Audio 2 */
        if (status & AUDIO2_IRQ) {
                if (chip->active & DAC2)
                        snd_pcm_period_elapsed(chip->playback_a_substream);
                /* ack interrupt */
                snd_es18xx_mixer_bits(chip, 0x7A, 0x80, 0x00);
        }
        if (status & AUDIO1_IRQ) {
                /* ok.. capture is active */
                if (chip->active & ADC1)
                        snd_pcm_period_elapsed(chip->capture_a_substream);
                /* ok.. playback2 is active */
                else if (chip->active & DAC1)
                        snd_pcm_period_elapsed(chip->playback_b_substream);
                /* ack interrupt */
                inb(chip->port + 0x0E);
        }

        /* MPU */
        if ((status & MPU_IRQ) && chip->rmidi)
                snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);

        /* Hardware volume */
        if (status & HWV_IRQ) {
                int split = 0;
                if (chip->caps & ES18XX_HWV) {
                        split = snd_es18xx_mixer_read(chip, 0x64) & 0x80;
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
                                        &chip->hw_switch->id);
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
                                        &chip->hw_volume->id);
                }
                if (!split) {
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
                                        &chip->master_switch->id);
                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
                                        &chip->master_volume->id);
                }
                /* ack interrupt */
                snd_es18xx_mixer_write(chip, 0x66, 0x00);
        }
        return IRQ_HANDLED;
}

static snd_pcm_uframes_t snd_es18xx_playback_pointer(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        int pos;

        if (substream->number == 0 && (chip->caps & ES18XX_PCM2)) {
                if (!(chip->active & DAC2))
                        return 0;
                pos = snd_dma_pointer(chip->dma2, size);
                return pos >> chip->dma2_shift;
        } else {
                if (!(chip->active & DAC1))
                        return 0;
                pos = snd_dma_pointer(chip->dma1, size);
                return pos >> chip->dma1_shift;
        }
}

static snd_pcm_uframes_t snd_es18xx_capture_pointer(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
        int pos;

        if (!(chip->active & ADC1))
                return 0;
        pos = snd_dma_pointer(chip->dma1, size);
        return pos >> chip->dma1_shift;
}

static struct snd_pcm_hardware snd_es18xx_playback =
{
        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_RESUME |
                                 SNDRV_PCM_INFO_MMAP_VALID),
        .formats =              (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | 
                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
        .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
        .rate_min =             4000,
        .rate_max =             48000,
        .channels_min =         1,
        .channels_max =         2,
        .buffer_bytes_max =     65536,
        .period_bytes_min =     64,
        .period_bytes_max =     65536,
        .periods_min =          1,
        .periods_max =          1024,
        .fifo_size =            0,
};

static struct snd_pcm_hardware snd_es18xx_capture =
{
        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_RESUME |
                                 SNDRV_PCM_INFO_MMAP_VALID),
        .formats =              (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 | 
                                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
        .rates =                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
        .rate_min =             4000,
        .rate_max =             48000,
        .channels_min =         1,
        .channels_max =         2,
        .buffer_bytes_max =     65536,
        .period_bytes_min =     64,
        .period_bytes_max =     65536,
        .periods_min =          1,
        .periods_max =          1024,
        .fifo_size =            0,
};

static int snd_es18xx_playback_open(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        if (substream->number == 0 && (chip->caps & ES18XX_PCM2)) {
                if ((chip->caps & ES18XX_DUPLEX_MONO) &&
                    chip->capture_a_substream && 
                    chip->capture_a_substream->runtime->channels != 1)
                        return -EAGAIN;
                chip->playback_a_substream = substream;
        } else if (substream->number <= 1) {
                if (chip->capture_a_substream)
                        return -EAGAIN;
                chip->playback_b_substream = substream;
        } else {
                snd_BUG();
                return -EINVAL;
        }
        substream->runtime->hw = snd_es18xx_playback;
        snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                      (chip->caps & ES18XX_NEW_RATE) ? &new_hw_constraints_clocks : &old_hw_constraints_clocks);
        return 0;
}

static int snd_es18xx_capture_open(struct snd_pcm_substream *substream)
{
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        if (chip->playback_b_substream)
                return -EAGAIN;
        if ((chip->caps & ES18XX_DUPLEX_MONO) &&
            chip->playback_a_substream &&
            chip->playback_a_substream->runtime->channels != 1)
                return -EAGAIN;
        chip->capture_a_substream = substream;
        substream->runtime->hw = snd_es18xx_capture;
        snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
                                      (chip->caps & ES18XX_NEW_RATE) ? &new_hw_constraints_clocks : &old_hw_constraints_clocks);
        return 0;
}

static int snd_es18xx_playback_close(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        if (substream->number == 0 && (chip->caps & ES18XX_PCM2))
                chip->playback_a_substream = NULL;
        else
                chip->playback_b_substream = NULL;
        
        snd_pcm_lib_free_pages(substream);
        return 0;
}

static int snd_es18xx_capture_close(struct snd_pcm_substream *substream)
{
        struct snd_es18xx *chip = snd_pcm_substream_chip(substream);

        chip->capture_a_substream = NULL;
        snd_pcm_lib_free_pages(substream);
        return 0;
}

/*
 *  MIXER part
 */

/* Record source mux routines:
 * Depending on the chipset this mux switches between 4, 5, or 8 possible inputs.
 * bit table for the 4/5 source mux:
 * reg 1C:
 *  b2 b1 b0   muxSource
 *   x  0  x   microphone
 *   0  1  x   CD
 *   1  1  0   line
 *   1  1  1   mixer
 * if it's "mixer" and it's a 5 source mux chipset then reg 7A bit 3 determines
 * either the play mixer or the capture mixer.
 *
 * "map4Source" translates from source number to reg bit pattern
 * "invMap4Source" translates from reg bit pattern to source number
 */

static int snd_es18xx_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
        static char *texts5Source[5] = {
                "Mic", "CD", "Line", "Master", "Mix"
        };
        static char *texts8Source[8] = {
                "Mic", "Mic Master", "CD", "AOUT",
                "Mic1", "Mix", "Line", "Master"
        };
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);

        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        switch (chip->version) {
        case 0x1868:
        case 0x1878:
                uinfo->value.enumerated.items = 4;
                if (uinfo->value.enumerated.item > 3)
                        uinfo->value.enumerated.item = 3;
                strcpy(uinfo->value.enumerated.name,
                        texts5Source[uinfo->value.enumerated.item]);
                break;
        case 0x1887:
        case 0x1888:
                uinfo->value.enumerated.items = 5;
                if (uinfo->value.enumerated.item > 4)
                        uinfo->value.enumerated.item = 4;
                strcpy(uinfo->value.enumerated.name, texts5Source[uinfo->value.enumerated.item]);
                break;
        case 0x1869: /* DS somewhat contradictory for 1869: could be be 5 or 8 */
        case 0x1879:
                uinfo->value.enumerated.items = 8;
                if (uinfo->value.enumerated.item > 7)
                        uinfo->value.enumerated.item = 7;
                strcpy(uinfo->value.enumerated.name, texts8Source[uinfo->value.enumerated.item]);
                break;

        default:
                return -EINVAL;
        }
        return 0;
}

static int snd_es18xx_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        static unsigned char invMap4Source[8] = {0, 0, 1, 1, 0, 0, 2, 3};
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        int muxSource = snd_es18xx_mixer_read(chip, 0x1c) & 0x07;
        if (!(chip->version == 0x1869 || chip->version == 0x1879)) {
                muxSource = invMap4Source[muxSource];
                if (muxSource==3 && 
                    (chip->version == 0x1887 || chip->version == 0x1888) &&
                    (snd_es18xx_mixer_read(chip, 0x7a) & 0x08)
                ) 
                        muxSource = 4;
        }
        ucontrol->value.enumerated.item[0] = muxSource;
        return 0;
}

static int snd_es18xx_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        static unsigned char map4Source[4] = {0, 2, 6, 7};
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        unsigned char val = ucontrol->value.enumerated.item[0];
        unsigned char retVal = 0;

        switch (chip->version) {
 /* 5 source chips */
        case 0x1887:
        case 0x1888:
                if (val > 4)
                        return -EINVAL;
                if (val == 4) {
                        retVal = snd_es18xx_mixer_bits(chip, 0x7a, 0x08, 0x08) != 0x08;
                        val = 3;
                } else
                        retVal = snd_es18xx_mixer_bits(chip, 0x7a, 0x08, 0x00) != 0x00;
 /* 4 source chips */
        case 0x1868:
        case 0x1878:
                if (val > 3)
                        return -EINVAL;
                val = map4Source[val];
                break;
 /* 8 source chips */
        case 0x1869:
        case 0x1879:
                if (val > 7)
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }
        return (snd_es18xx_mixer_bits(chip, 0x1c, 0x07, val) != val) || retVal;
}

#define snd_es18xx_info_spatializer_enable      snd_ctl_boolean_mono_info

static int snd_es18xx_get_spatializer_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        unsigned char val = snd_es18xx_mixer_read(chip, 0x50);
        ucontrol->value.integer.value[0] = !!(val & 8);
        return 0;
}

static int snd_es18xx_put_spatializer_enable(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        unsigned char oval, nval;
        int change;
        nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
        oval = snd_es18xx_mixer_read(chip, 0x50) & 0x0c;
        change = nval != oval;
        if (change) {
                snd_es18xx_mixer_write(chip, 0x50, nval & ~0x04);
                snd_es18xx_mixer_write(chip, 0x50, nval);
        }
        return change;
}

static int snd_es18xx_info_hw_volume(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 = 63;
        return 0;
}

static int snd_es18xx_get_hw_volume(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        ucontrol->value.integer.value[0] = snd_es18xx_mixer_read(chip, 0x61) & 0x3f;
        ucontrol->value.integer.value[1] = snd_es18xx_mixer_read(chip, 0x63) & 0x3f;
        return 0;
}

#define snd_es18xx_info_hw_switch       snd_ctl_boolean_stereo_info

static int snd_es18xx_get_hw_switch(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        ucontrol->value.integer.value[0] = !(snd_es18xx_mixer_read(chip, 0x61) & 0x40);
        ucontrol->value.integer.value[1] = !(snd_es18xx_mixer_read(chip, 0x63) & 0x40);
        return 0;
}

static void snd_es18xx_hwv_free(struct snd_kcontrol *kcontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        chip->master_volume = NULL;
        chip->master_switch = NULL;
        chip->hw_volume = NULL;
        chip->hw_switch = NULL;
}

static int snd_es18xx_reg_bits(struct snd_es18xx *chip, unsigned char reg,
                               unsigned char mask, unsigned char val)
{
        if (reg < 0xa0)
                return snd_es18xx_mixer_bits(chip, reg, mask, val);
        else
                return snd_es18xx_bits(chip, reg, mask, val);
}

static int snd_es18xx_reg_read(struct snd_es18xx *chip, unsigned char reg)
{
        if (reg < 0xa0)
                return snd_es18xx_mixer_read(chip, reg);
        else
                return snd_es18xx_read(chip, reg);
}

#define ES18XX_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es18xx_info_single, \
  .get = snd_es18xx_get_single, .put = snd_es18xx_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_es18xx_info_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *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_es18xx_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        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 val;
        
        val = snd_es18xx_reg_read(chip, reg);
        ucontrol->value.integer.value[0] = (val >> shift) & mask;
        if (invert)
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
        return 0;
}

static int snd_es18xx_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        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;
        unsigned char val;
        
        val = (ucontrol->value.integer.value[0] & mask);
        if (invert)
                val = mask - val;
        mask <<= shift;
        val <<= shift;
        return snd_es18xx_reg_bits(chip, reg, mask, val) != val;
}

#define ES18XX_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_es18xx_info_double, \
  .get = snd_es18xx_get_double, .put = snd_es18xx_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

static int snd_es18xx_info_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *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_es18xx_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        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;
        unsigned char left, right;
        
        left = snd_es18xx_reg_read(chip, left_reg);
        if (left_reg != right_reg)
                right = snd_es18xx_reg_read(chip, right_reg);
        else
                right = left;
        ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
        ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
        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_es18xx_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
        struct snd_es18xx *chip = snd_kcontrol_chip(kcontrol);
        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 char val1, val2, mask1, mask2;
        
        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;
        mask1 = mask << shift_left;
        mask2 = mask << shift_right;
        if (left_reg != right_reg) {
                change = 0;
                if (snd_es18xx_reg_bits(chip, left_reg, mask1, val1) != val1)
                        change = 1;
                if (snd_es18xx_reg_bits(chip, right_reg, mask2, val2) != val2)
                        change = 1;
        } else {
                change = (snd_es18xx_reg_bits(chip, left_reg, mask1 | mask2, 
                                              val1 | val2) != (val1 | val2));
        }
        return change;
}

/* Mixer controls
 * These arrays contain setup data for mixer controls.
 * 
 * The controls that are universal to all chipsets are fully initialized
 * here.
 */
static struct snd_kcontrol_new snd_es18xx_base_controls[] = {
ES18XX_DOUBLE("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0),
ES18XX_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
ES18XX_DOUBLE("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0),
ES18XX_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
ES18XX_DOUBLE("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0),
ES18XX_DOUBLE("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0),
ES18XX_DOUBLE("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0),
ES18XX_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
ES18XX_DOUBLE("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0),
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Capture Source",
        .info = snd_es18xx_info_mux,
        .get = snd_es18xx_get_mux,
        .put = snd_es18xx_put_mux,
}
};

static struct snd_kcontrol_new snd_es18xx_recmix_controls[] = {
ES18XX_DOUBLE("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0),
ES18XX_DOUBLE("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0),
ES18XX_DOUBLE("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0),
ES18XX_DOUBLE("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0),
ES18XX_DOUBLE("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0),
ES18XX_DOUBLE("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0)
};

/*
 * The chipset specific mixer controls
 */
static struct snd_kcontrol_new snd_es18xx_opt_speaker =
        ES18XX_SINGLE("Beep Playback Volume", 0, 0x3c, 0, 7, 0);

static struct snd_kcontrol_new snd_es18xx_opt_1869[] = {
ES18XX_SINGLE("Capture Switch", 0, 0x1c, 4, 1, 1),
ES18XX_SINGLE("Video Playback Switch", 0, 0x7f, 0, 1, 0),
ES18XX_DOUBLE("Mono Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0),
ES18XX_DOUBLE("Mono Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0)
};

static struct snd_kcontrol_new snd_es18xx_opt_1878 =
        ES18XX_DOUBLE("Video Playback Volume", 0, 0x68, 0x68, 4, 0, 15, 0);

static struct snd_kcontrol_new snd_es18xx_opt_1879[] = {
ES18XX_SINGLE("Video Playback Switch", 0, 0x71, 6, 1, 0),
ES18XX_DOUBLE("Video Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0),
ES18XX_DOUBLE("Video Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0)
};

static struct snd_kcontrol_new snd_es18xx_pcm1_controls[] = {
ES18XX_DOUBLE("PCM Playback Volume", 0, 0x14, 0x14, 4, 0, 15, 0),
};

static struct snd_kcontrol_new snd_es18xx_pcm2_controls[] = {
ES18XX_DOUBLE("PCM Playback Volume", 0, 0x7c, 0x7c, 4, 0, 15, 0),
ES18XX_DOUBLE("PCM Playback Volume", 1, 0x14, 0x14, 4, 0, 15, 0)
};

static struct snd_kcontrol_new snd_es18xx_spatializer_controls[] = {
ES18XX_SINGLE("3D Control - Level", 0, 0x52, 0, 63, 0),
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "3D Control - Switch",
        .info = snd_es18xx_info_spatializer_enable,
        .get = snd_es18xx_get_spatializer_enable,
        .put = snd_es18xx_put_spatializer_enable,
}
};

static struct snd_kcontrol_new snd_es18xx_micpre1_control = 
ES18XX_SINGLE("Mic Boost (+26dB)", 0, 0xa9, 2, 1, 0);

static struct snd_kcontrol_new snd_es18xx_micpre2_control =
ES18XX_SINGLE("Mic Boost (+26dB)", 0, 0x7d, 3, 1, 0);

static struct snd_kcontrol_new snd_es18xx_hw_volume_controls[] = {
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Hardware Master Playback Volume",
        .access = SNDRV_CTL_ELEM_ACCESS_READ,
        .info = snd_es18xx_info_hw_volume,
        .get = snd_es18xx_get_hw_volume,
},
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Hardware Master Playback Switch",
        .access = SNDRV_CTL_ELEM_ACCESS_READ,
        .info = snd_es18xx_info_hw_switch,
        .get = snd_es18xx_get_hw_switch,
},
ES18XX_SINGLE("Hardware Master Volume Split", 0, 0x64, 7, 1, 0),
};

static int snd_es18xx_config_read(struct snd_es18xx *chip, unsigned char reg)
{
        int data;

        outb(reg, chip->ctrl_port);
        data = inb(chip->ctrl_port + 1);
        return data;
}

static void snd_es18xx_config_write(struct snd_es18xx *chip,
                                    unsigned char reg, unsigned char data)
{
        /* No need for spinlocks, this function is used only in
           otherwise protected init code */
        outb(reg, chip->ctrl_port);
        outb(data, chip->ctrl_port + 1);
#ifdef REG_DEBUG
        snd_printk(KERN_DEBUG "Config reg %02x set to %02x\n", reg, data);
#endif
}

static int snd_es18xx_initialize(struct snd_es18xx *chip,
                                 unsigned long mpu_port,
                                 unsigned long fm_port)
{
        int mask = 0;

        /* enable extended mode */
        snd_es18xx_dsp_command(chip, 0xC6);
        /* Reset mixer registers */
        snd_es18xx_mixer_write(chip, 0x00, 0x00);

        /* Audio 1 DMA demand mode (4 bytes/request) */
        snd_es18xx_write(chip, 0xB9, 2);
        if (chip->caps & ES18XX_CONTROL) {
                /* Hardware volume IRQ */
                snd_es18xx_config_write(chip, 0x27, chip->irq);
                if (fm_port > 0 && fm_port != SNDRV_AUTO_PORT) {
                        /* FM I/O */
                        snd_es18xx_config_write(chip, 0x62, fm_port >> 8);
                        snd_es18xx_config_write(chip, 0x63, fm_port & 0xff);
                }
                if (mpu_port > 0 && mpu_port != SNDRV_AUTO_PORT) {
                        /* MPU-401 I/O */
                        snd_es18xx_config_write(chip, 0x64, mpu_port >> 8);
                        snd_es18xx_config_write(chip, 0x65, mpu_port & 0xff);
                        /* MPU-401 IRQ */
                        snd_es18xx_config_write(chip, 0x28, chip->irq);
                }
                /* Audio1 IRQ */
                snd_es18xx_config_write(chip, 0x70, chip->irq);
                /* Audio2 IRQ */
                snd_es18xx_config_write(chip, 0x72, chip->irq);
                /* Audio1 DMA */
                snd_es18xx_config_write(chip, 0x74, chip->dma1);
                /* Audio2 DMA */
                snd_es18xx_config_write(chip, 0x75, chip->dma2);

                /* Enable Audio 1 IRQ */
                snd_es18xx_write(chip, 0xB1, 0x50);
                /* Enable Audio 2 IRQ */
                snd_es18xx_mixer_write(chip, 0x7A, 0x40);
                /* Enable Audio 1 DMA */
                snd_es18xx_write(chip, 0xB2, 0x50);
                /* Enable MPU and hardware volume interrupt */
                snd_es18xx_mixer_write(chip, 0x64, 0x42);
                /* Enable ESS wavetable input */
                snd_es18xx_mixer_bits(chip, 0x48, 0x10, 0x10);
        }
        else {
                int irqmask, dma1mask, dma2mask;
                switch (chip->irq) {
                case 2:
                case 9:
                        irqmask = 0;
                        break;
                case 5:
                        irqmask = 1;
                        break;
                case 7:
                        irqmask = 2;
                        break;
                case 10:
                        irqmask = 3;
                        break;
                default:
                        snd_printk(KERN_ERR "invalid irq %d\n", chip->irq);
                        return -ENODEV;
                }
                switch (chip->dma1) {
                case 0:
                        dma1mask = 1;
                        break;
                case 1:
                        dma1mask = 2;
                        break;
                case 3:
                        dma1mask = 3;
                        break;
                default:
                        snd_printk(KERN_ERR "invalid dma1 %d\n", chip->dma1);
                        return -ENODEV;
                }
                switch (chip->dma2) {
                case 0:
                        dma2mask = 0;
                        break;
                case 1:
                        dma2mask = 1;
                        break;
                case 3:
                        dma2mask = 2;
                        break;
                case 5:
                        dma2mask = 3;
                        break;
                default:
                        snd_printk(KERN_ERR "invalid dma2 %d\n", chip->dma2);
                        return -ENODEV;
                }

                /* Enable and set Audio 1 IRQ */
                snd_es18xx_write(chip, 0xB1, 0x50 | (irqmask << 2));
                /* Enable and set Audio 1 DMA */
                snd_es18xx_write(chip, 0xB2, 0x50 | (dma1mask << 2));
                /* Set Audio 2 DMA */
                snd_es18xx_mixer_bits(chip, 0x7d, 0x07, 0x04 | dma2mask);
                /* Enable Audio 2 IRQ and DMA
                   Set capture mixer input */
                snd_es18xx_mixer_write(chip, 0x7A, 0x68);
                /* Enable and set hardware volume interrupt */
                snd_es18xx_mixer_write(chip, 0x64, 0x06);
                if (mpu_port > 0 && mpu_port != SNDRV_AUTO_PORT) {
                        /* MPU401 share irq with audio
                           Joystick enabled
                           FM enabled */
                        snd_es18xx_mixer_write(chip, 0x40,
                                               0x43 | (mpu_port & 0xf0) >> 1);
                }
                snd_es18xx_mixer_write(chip, 0x7f, ((irqmask + 1) << 1) | 0x01);
        }
        if (chip->caps & ES18XX_NEW_RATE) {
                /* Change behaviour of register A1
                   4x oversampling
                   2nd channel DAC asynchronous */
                snd_es18xx_mixer_write(chip, 0x71, 0x32);
        }
        if (!(chip->caps & ES18XX_PCM2)) {
                /* Enable DMA FIFO */
                snd_es18xx_write(chip, 0xB7, 0x80);
        }
        if (chip->caps & ES18XX_SPATIALIZER) {
                /* Set spatializer parameters to recommended values */
                snd_es18xx_mixer_write(chip, 0x54, 0x8f);
                snd_es18xx_mixer_write(chip, 0x56, 0x95);
                snd_es18xx_mixer_write(chip, 0x58, 0x94);
                snd_es18xx_mixer_write(chip, 0x5a, 0x80);
        }
        /* Flip the "enable I2S" bits for those chipsets that need it */
        switch (chip->version) {
        case 0x1879:
                //Leaving I2S enabled on the 1879 screws up the PCM playback (rate effected somehow)
                //so a Switch control has been added to toggle this 0x71 bit on/off:
                //snd_es18xx_mixer_bits(chip, 0x71, 0x40, 0x40);
                /* Note: we fall through on purpose here. */
        case 0x1878:
                snd_es18xx_config_write(chip, 0x29, snd_es18xx_config_read(chip, 0x29) | 0x40);
                break;
        }
        /* Mute input source */
        if (chip->caps & ES18XX_MUTEREC)
                mask = 0x10;
        if (chip->caps & ES18XX_RECMIX)
                snd_es18xx_mixer_write(chip, 0x1c, 0x05 | mask);
        else {
                snd_es18xx_mixer_write(chip, 0x1c, 0x00 | mask);
                snd_es18xx_write(chip, 0xb4, 0x00);
        }
#ifndef AVOID_POPS
        /* Enable PCM output */
        snd_es18xx_dsp_command(chip, 0xD1);
#endif

        return 0;
}

static int snd_es18xx_identify(struct snd_es18xx *chip)
{
        int hi,lo;

        /* reset */
        if (snd_es18xx_reset(chip) < 0) {
                snd_printk(KERN_ERR "reset at 0x%lx failed!!!\n", chip->port);
                return -ENODEV;
        }

        snd_es18xx_dsp_command(chip, 0xe7);
        hi = snd_es18xx_dsp_get_byte(chip);
        if (hi < 0) {
                return hi;
        }
        lo = snd_es18xx_dsp_get_byte(chip);
        if ((lo & 0xf0) != 0x80) {
                return -ENODEV;
        }
        if (hi == 0x48) {
                chip->version = 0x488;
                return 0;
        }
        if (hi != 0x68) {
                return -ENODEV;
        }
        if ((lo & 0x0f) < 8) {
                chip->version = 0x688;
                return 0;
        }
                        
        outb(0x40, chip->port + 0x04);
        udelay(10);
        hi = inb(chip->port + 0x05);
        udelay(10);
        lo = inb(chip->port + 0x05);
        if (hi != lo) {
                chip->version = hi << 8 | lo;
                chip->ctrl_port = inb(chip->port + 0x05) << 8;
                udelay(10);
                chip->ctrl_port += inb(chip->port + 0x05);

                if ((chip->res_ctrl_port = request_region(chip->ctrl_port, 8, "ES18xx - CTRL")) == NULL) {
                        snd_printk(KERN_ERR PFX "unable go grab port 0x%lx\n", chip->ctrl_port);
                        return -EBUSY;
                }

                return 0;
        }

        /* If has Hardware volume */
        if (snd_es18xx_mixer_writable(chip, 0x64, 0x04)) {
                /* If has Audio2 */
                if (snd_es18xx_mixer_writable(chip, 0x70, 0x7f)) {
                        /* If has volume count */
                        if (snd_es18xx_mixer_writable(chip, 0x64, 0x20)) {
                                chip->version = 0x1887;
                        } else {
                                chip->version = 0x1888;
                        }
                } else {
                        chip->version = 0x1788;
                }
        }
        else
                chip->version = 0x1688;
        return 0;
}

static int snd_es18xx_probe(struct snd_es18xx *chip,
                            unsigned long mpu_port,
                            unsigned long fm_port)
{
        if (snd_es18xx_identify(chip) < 0) {
                snd_printk(KERN_ERR PFX "[0x%lx] ESS chip not found\n", chip->port);
                return -ENODEV;
        }

        switch (chip->version) {
        case 0x1868:
                chip->caps = ES18XX_DUPLEX_MONO | ES18XX_DUPLEX_SAME | ES18XX_CONTROL;
                break;
        case 0x1869:
                chip->caps = ES18XX_PCM2 | ES18XX_SPATIALIZER | ES18XX_RECMIX | ES18XX_NEW_RATE | ES18XX_AUXB | ES18XX_MONO | ES18XX_MUTEREC | ES18XX_CONTROL | ES18XX_HWV;
                break;
        case 0x1878:
                chip->caps = ES18XX_DUPLEX_MONO | ES18XX_DUPLEX_SAME | ES18XX_I2S | ES18XX_CONTROL;
                break;
        case 0x1879:
                chip->caps = ES18XX_PCM2 | ES18XX_SPATIALIZER | ES18XX_RECMIX | ES18XX_NEW_RATE | ES18XX_AUXB | ES18XX_I2S | ES18XX_CONTROL | ES18XX_HWV;
                break;
        case 0x1887:
        case 0x1888:
                chip->caps = ES18XX_PCM2 | ES18XX_RECMIX | ES18XX_AUXB | ES18XX_DUPLEX_SAME;
                break;
        default:
                snd_printk(KERN_ERR "[0x%lx] unsupported chip ES%x\n",
                           chip->port, chip->version);
                return -ENODEV;
        }

        snd_printd("[0x%lx] ESS%x chip found\n", chip->port, chip->version);

        if (chip->dma1 == chip->dma2)
                chip->caps &= ~(ES18XX_PCM2 | ES18XX_DUPLEX_SAME);

        return snd_es18xx_initialize(chip, mpu_port, fm_port);
}

static struct snd_pcm_ops snd_es18xx_playback_ops = {
        .open =         snd_es18xx_playback_open,
        .close =        snd_es18xx_playback_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_es18xx_playback_hw_params,
        .hw_free =      snd_es18xx_pcm_hw_free,
        .prepare =      snd_es18xx_playback_prepare,
        .trigger =      snd_es18xx_playback_trigger,
        .pointer =      snd_es18xx_playback_pointer,
};

static struct snd_pcm_ops snd_es18xx_capture_ops = {
        .open =         snd_es18xx_capture_open,
        .close =        snd_es18xx_capture_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_es18xx_capture_hw_params,
        .hw_free =      snd_es18xx_pcm_hw_free,
        .prepare =      snd_es18xx_capture_prepare,
        .trigger =      snd_es18xx_capture_trigger,
        .pointer =      snd_es18xx_capture_pointer,
};

static int snd_es18xx_pcm(struct snd_card *card, int device,
                          struct snd_pcm **rpcm)
{
        struct snd_es18xx *chip = card->private_data;
        struct snd_pcm *pcm;
        char str[16];
        int err;

        if (rpcm)
                *rpcm = NULL;
        sprintf(str, "ES%x", chip->version);
        if (chip->caps & ES18XX_PCM2)
                err = snd_pcm_new(card, str, device, 2, 1, &pcm);
        else
                err = snd_pcm_new(card, str, device, 1, 1, &pcm);
        if (err < 0)
                return err;

        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es18xx_playback_ops);
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es18xx_capture_ops);

        /* global setup */
        pcm->private_data = chip;
        pcm->info_flags = 0;
        if (chip->caps & ES18XX_DUPLEX_SAME)
                pcm->info_flags |= SNDRV_PCM_INFO_JOINT_DUPLEX;
        if (! (chip->caps & ES18XX_PCM2))
                pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
        sprintf(pcm->name, "ESS AudioDrive ES%x", chip->version);
        chip->pcm = pcm;

        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                              snd_dma_isa_data(),
                                              64*1024,
                                              chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);

        if (rpcm)
                *rpcm = pcm;
        return 0;
}

/* Power Management support functions */
#ifdef CONFIG_PM
static int snd_es18xx_suspend(struct snd_card *card, pm_message_t state)
{
        struct snd_es18xx *chip = card->private_data;

        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);

        snd_pcm_suspend_all(chip->pcm);

        /* power down */
        chip->pm_reg = (unsigned char)snd_es18xx_read(chip, ES18XX_PM);
        chip->pm_reg |= (ES18XX_PM_FM | ES18XX_PM_SUS);
        snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg);
        snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg ^= ES18XX_PM_SUS);

        return 0;
}

static int snd_es18xx_resume(struct snd_card *card)
{
        struct snd_es18xx *chip = card->private_data;

        /* restore PM register, we won't wake till (not 0x07) i/o activity though */
        snd_es18xx_write(chip, ES18XX_PM, chip->pm_reg ^= ES18XX_PM_FM);

        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
        return 0;
}
#endif /* CONFIG_PM */

static int snd_es18xx_free(struct snd_card *card)
{
        struct snd_es18xx *chip = card->private_data;

        release_and_free_resource(chip->res_port);
        release_and_free_resource(chip->res_ctrl_port);
        release_and_free_resource(chip->res_mpu_port);
        if (chip->irq >= 0)
                free_irq(chip->irq, (void *) card);
        if (chip->dma1 >= 0) {
                disable_dma(chip->dma1);
                free_dma(chip->dma1);
        }
        if (chip->dma2 >= 0 && chip->dma1 != chip->dma2) {
                disable_dma(chip->dma2);
                free_dma(chip->dma2);
        }
        return 0;
}

static int snd_es18xx_dev_free(struct snd_device *device)
{
        return snd_es18xx_free(device->card);
}

static int snd_es18xx_new_device(struct snd_card *card,
                                 unsigned long port,
                                 unsigned long mpu_port,
                                 unsigned long fm_port,
                                 int irq, int dma1, int dma2)
{
        struct snd_es18xx *chip = card->private_data;
        static struct snd_device_ops ops = {
                .dev_free =     snd_es18xx_dev_free,
        };
        int err;

        spin_lock_init(&chip->reg_lock);
        spin_lock_init(&chip->mixer_lock);
        chip->port = port;
        chip->irq = -1;
        chip->dma1 = -1;
        chip->dma2 = -1;
        chip->audio2_vol = 0x00;
        chip->active = 0;

        chip->res_port = request_region(port, 16, "ES18xx");
        if (chip->res_port == NULL) {
                snd_es18xx_free(card);
                snd_printk(KERN_ERR PFX "unable to grap ports 0x%lx-0x%lx\n", port, port + 16 - 1);
                return -EBUSY;
        }

        if (request_irq(irq, snd_es18xx_interrupt, 0, "ES18xx",
                        (void *) card)) {
                snd_es18xx_free(card);
                snd_printk(KERN_ERR PFX "unable to grap IRQ %d\n", irq);
                return -EBUSY;
        }
        chip->irq = irq;

        if (request_dma(dma1, "ES18xx DMA 1")) {
                snd_es18xx_free(card);
                snd_printk(KERN_ERR PFX "unable to grap DMA1 %d\n", dma1);
                return -EBUSY;
        }
        chip->dma1 = dma1;

        if (dma2 != dma1 && request_dma(dma2, "ES18xx DMA 2")) {
                snd_es18xx_free(card);
                snd_printk(KERN_ERR PFX "unable to grap DMA2 %d\n", dma2);
                return -EBUSY;
        }
        chip->dma2 = dma2;

        if (snd_es18xx_probe(chip, mpu_port, fm_port) < 0) {
                snd_es18xx_free(card);
                return -ENODEV;
        }
        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
        if (err < 0) {
                snd_es18xx_free(card);
                return err;
        }
        return 0;
}

static int snd_es18xx_mixer(struct snd_card *card)
{
        struct snd_es18xx *chip = card->private_data;
        int err;
        unsigned int idx;

        strcpy(card->mixername, chip->pcm->name);

        for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_base_controls); idx++) {
                struct snd_kcontrol *kctl;
                kctl = snd_ctl_new1(&snd_es18xx_base_controls[idx], chip);
                if (chip->caps & ES18XX_HWV) {
                        switch (idx) {
                        case 0:
                                chip->master_volume = kctl;
                                kctl->private_free = snd_es18xx_hwv_free;
                                break;
                        case 1:
                                chip->master_switch = kctl;
                                kctl->private_free = snd_es18xx_hwv_free;
                                break;
                        }
                }
                if ((err = snd_ctl_add(card, kctl)) < 0)
                        return err;
        }
        if (chip->caps & ES18XX_PCM2) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_pcm2_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_pcm2_controls[idx], chip))) < 0)
                                return err;
                } 
        } else {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_pcm1_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_pcm1_controls[idx], chip))) < 0)
                                return err;
                }
        }

        if (chip->caps & ES18XX_RECMIX) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_recmix_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_recmix_controls[idx], chip))) < 0)
                                return err;
                }
        }
        switch (chip->version) {
        default:
                if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_micpre1_control, chip))) < 0)
                        return err;
                break;
        case 0x1869:
        case 0x1879:
                if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_micpre2_control, chip))) < 0)
                        return err;
                break;
        }
        if (chip->caps & ES18XX_SPATIALIZER) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_spatializer_controls); idx++) {
                        if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_spatializer_controls[idx], chip))) < 0)
                                return err;
                }
        }
        if (chip->caps & ES18XX_HWV) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_hw_volume_controls); idx++) {
                        struct snd_kcontrol *kctl;
                        kctl = snd_ctl_new1(&snd_es18xx_hw_volume_controls[idx], chip);
                        if (idx == 0)
                                chip->hw_volume = kctl;
                        else
                                chip->hw_switch = kctl;
                        kctl->private_free = snd_es18xx_hwv_free;
                        if ((err = snd_ctl_add(card, kctl)) < 0)
                                return err;
                        
                }
        }
        /* finish initializing other chipset specific controls
         */
        if (chip->version != 0x1868) {
                err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_opt_speaker,
                                                     chip));
                if (err < 0)
                        return err;
        }
        if (chip->version == 0x1869) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_opt_1869); idx++) {
                        err = snd_ctl_add(card,
                                          snd_ctl_new1(&snd_es18xx_opt_1869[idx],
                                                       chip));
                        if (err < 0)
                                return err;
                }
        } else if (chip->version == 0x1878) {
                err = snd_ctl_add(card, snd_ctl_new1(&snd_es18xx_opt_1878,
                                                     chip));
                if (err < 0)
                        return err;
        } else if (chip->version == 0x1879) {
                for (idx = 0; idx < ARRAY_SIZE(snd_es18xx_opt_1879); idx++) {
                        err = snd_ctl_add(card,
                                          snd_ctl_new1(&snd_es18xx_opt_1879[idx],
                                                       chip));
                        if (err < 0)
                                return err;
                }
        }
        return 0;
}
       

/* Card level */

MODULE_AUTHOR("Christian Fischbach <fishbach@pool.informatik.rwth-aachen.de>, Abramo Bagnara <abramo@alsa-project.org>");  
MODULE_DESCRIPTION("ESS ES18xx AudioDrive");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESS,ES1868 PnP AudioDrive},"
                "{ESS,ES1869 PnP AudioDrive},"
                "{ESS,ES1878 PnP AudioDrive},"
                "{ESS,ES1879 PnP AudioDrive},"
                "{ESS,ES1887 PnP AudioDrive},"
                "{ESS,ES1888 PnP AudioDrive},"
                "{ESS,ES1887 AudioDrive},"
                "{ESS,ES1888 AudioDrive}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP; /* Enable this card */
#ifdef CONFIG_PNP
static bool isapnp[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_ISAPNP;
#endif
static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* 0x220,0x240,0x260,0x280 */
#ifndef CONFIG_PNP
static long mpu_port[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -1};
#else
static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
#endif
static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* 5,7,9,10 */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 0,1,3 */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 0,1,3 */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for ES18xx soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for ES18xx soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable ES18xx soundcard.");
#ifdef CONFIG_PNP
module_param_array(isapnp, bool, NULL, 0444);
MODULE_PARM_DESC(isapnp, "PnP detection for specified soundcard.");
#endif
module_param_array(port, long, NULL, 0444);
MODULE_PARM_DESC(port, "Port # for ES18xx driver.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for ES18xx driver.");
module_param_array(fm_port, long, NULL, 0444);
MODULE_PARM_DESC(fm_port, "FM port # for ES18xx driver.");
module_param_array(irq, int, NULL, 0444);
MODULE_PARM_DESC(irq, "IRQ # for ES18xx driver.");
module_param_array(dma1, int, NULL, 0444);

MODULE_PARM_DESC(dma1, "DMA 1 # for ES18xx driver.");
module_param_array(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "DMA 2 # for ES18xx driver.");

#ifdef CONFIG_PNP
static int isa_registered;
static int pnp_registered;
static int pnpc_registered;

static struct pnp_device_id snd_audiodrive_pnpbiosids[] = {
        { .id = "ESS1869" },
        { .id = "ESS1879" },
        { .id = "" }            /* end */
};

MODULE_DEVICE_TABLE(pnp, snd_audiodrive_pnpbiosids);

/* PnP main device initialization */
static int snd_audiodrive_pnp_init_main(int dev, struct pnp_dev *pdev)
{
        if (pnp_activate_dev(pdev) < 0) {
                snd_printk(KERN_ERR PFX "PnP configure failure (out of resources?)\n");
                return -EBUSY;
        }
        /* ok. hack using Vendor-Defined Card-Level registers */
        /* skip csn and logdev initialization - already done in isapnp_configure */
        if (pnp_device_is_isapnp(pdev)) {
                isapnp_cfg_begin(isapnp_card_number(pdev), isapnp_csn_number(pdev));
                isapnp_write_byte(0x27, pnp_irq(pdev, 0));      /* Hardware Volume IRQ Number */
                if (mpu_port[dev] != SNDRV_AUTO_PORT)
                        isapnp_write_byte(0x28, pnp_irq(pdev, 0)); /* MPU-401 IRQ Number */
                isapnp_write_byte(0x72, pnp_irq(pdev, 0));      /* second IRQ */
                isapnp_cfg_end();
        }
        port[dev] = pnp_port_start(pdev, 0);
        fm_port[dev] = pnp_port_start(pdev, 1);
        mpu_port[dev] = pnp_port_start(pdev, 2);
        dma1[dev] = pnp_dma(pdev, 0);
        dma2[dev] = pnp_dma(pdev, 1);
        irq[dev] = pnp_irq(pdev, 0);
        snd_printdd("PnP ES18xx: port=0x%lx, fm port=0x%lx, mpu port=0x%lx\n", port[dev], fm_port[dev], mpu_port[dev]);
        snd_printdd("PnP ES18xx: dma1=%i, dma2=%i, irq=%i\n", dma1[dev], dma2[dev], irq[dev]);
        return 0;
}

static int snd_audiodrive_pnp(int dev, struct snd_es18xx *chip,
                              struct pnp_dev *pdev)
{
        chip->dev = pdev;
        if (snd_audiodrive_pnp_init_main(dev, chip->dev) < 0)
                return -EBUSY;
        return 0;
}

static struct pnp_card_device_id snd_audiodrive_pnpids[] = {
        /* ESS 1868 (integrated on Compaq dual P-Pro motherboard and Genius 18PnP 3D) */
        { .id = "ESS1868", .devs = { { "ESS1868" }, { "ESS0000" } } },
        /* ESS 1868 (integrated on Maxisound Cards) */
        { .id = "ESS1868", .devs = { { "ESS8601" }, { "ESS8600" } } },
        /* ESS 1868 (integrated on Maxisound Cards) */
        { .id = "ESS1868", .devs = { { "ESS8611" }, { "ESS8610" } } },
        /* ESS ES1869 Plug and Play AudioDrive */
        { .id = "ESS0003", .devs = { { "ESS1869" }, { "ESS0006" } } },
        /* ESS 1869 */
        { .id = "ESS1869", .devs = { { "ESS1869" }, { "ESS0006" } } },
        /* ESS 1878 */
        { .id = "ESS1878", .devs = { { "ESS1878" }, { "ESS0004" } } },
        /* ESS 1879 */
        { .id = "ESS1879", .devs = { { "ESS1879" }, { "ESS0009" } } },
        /* --- */
        { .id = "" } /* end */
};

MODULE_DEVICE_TABLE(pnp_card, snd_audiodrive_pnpids);

static int snd_audiodrive_pnpc(int dev, struct snd_es18xx *chip,
                               struct pnp_card_link *card,
                               const struct pnp_card_device_id *id)
{
        chip->dev = pnp_request_card_device(card, id->devs[0].id, NULL);
        if (chip->dev == NULL)
                return -EBUSY;

        chip->devc = pnp_request_card_device(card, id->devs[1].id, NULL);
        if (chip->devc == NULL)
                return -EBUSY;

        /* Control port initialization */
        if (pnp_activate_dev(chip->devc) < 0) {
                snd_printk(KERN_ERR PFX "PnP control configure failure (out of resources?)\n");
                return -EAGAIN;
        }
        snd_printdd("pnp: port=0x%llx\n",
                        (unsigned long long)pnp_port_start(chip->devc, 0));
        if (snd_audiodrive_pnp_init_main(dev, chip->dev) < 0)
                return -EBUSY;

        return 0;
}
#endif /* CONFIG_PNP */

#ifdef CONFIG_PNP
#define is_isapnp_selected(dev)         isapnp[dev]
#else
#define is_isapnp_selected(dev)         0
#endif

static int snd_es18xx_card_new(int dev, struct snd_card **cardp)
{
        return snd_card_create(index[dev], id[dev], THIS_MODULE,
                               sizeof(struct snd_es18xx), cardp);
}

static int snd_audiodrive_probe(struct snd_card *card, int dev)
{
        struct snd_es18xx *chip = card->private_data;
        struct snd_opl3 *opl3;
        int err;

        err = snd_es18xx_new_device(card,
                                    port[dev], mpu_port[dev], fm_port[dev],
                                    irq[dev], dma1[dev], dma2[dev]);
        if (err < 0)
                return err;

        sprintf(card->driver, "ES%x", chip->version);
        
        sprintf(card->shortname, "ESS AudioDrive ES%x", chip->version);
        if (dma1[dev] != dma2[dev])
                sprintf(card->longname, "%s at 0x%lx, irq %d, dma1 %d, dma2 %d",
                        card->shortname,
                        chip->port,
                        irq[dev], dma1[dev], dma2[dev]);
        else
                sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
                        card->shortname,
                        chip->port,
                        irq[dev], dma1[dev]);

        err = snd_es18xx_pcm(card, 0, NULL);
        if (err < 0)
                return err;

        err = snd_es18xx_mixer(card);
        if (err < 0)
                return err;

        if (fm_port[dev] > 0 && fm_port[dev] != SNDRV_AUTO_PORT) {
                if (snd_opl3_create(card, fm_port[dev], fm_port[dev] + 2,
                                    OPL3_HW_OPL3, 0, &opl3) < 0) {
                        snd_printk(KERN_WARNING PFX
                                   "opl3 not detected at 0x%lx\n",
                                   fm_port[dev]);
                } else {
                        err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
                        if (err < 0)
                                return err;
                }
        }

        if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
                err = snd_mpu401_uart_new(card, 0, MPU401_HW_ES18XX,
                                          mpu_port[dev], MPU401_INFO_IRQ_HOOK,
                                          -1, &chip->rmidi);
                if (err < 0)
                        return err;
        }

        return snd_card_register(card);
}

static int snd_es18xx_isa_match(struct device *pdev, unsigned int dev)
{
        return enable[dev] && !is_isapnp_selected(dev);
}

static int snd_es18xx_isa_probe1(int dev, struct device *devptr)
{
        struct snd_card *card;
        int err;

        err = snd_es18xx_card_new(dev, &card);
        if (err < 0)
                return err;
        snd_card_set_dev(card, devptr);
        if ((err = snd_audiodrive_probe(card, dev)) < 0) {
                snd_card_free(card);
                return err;
        }
        dev_set_drvdata(devptr, card);
        return 0;
}

static int snd_es18xx_isa_probe(struct device *pdev, unsigned int dev)
{
        int err;
        static int possible_irqs[] = {5, 9, 10, 7, 11, 12, -1};
        static int possible_dmas[] = {1, 0, 3, 5, -1};

        if (irq[dev] == SNDRV_AUTO_IRQ) {
                if ((irq[dev] = snd_legacy_find_free_irq(possible_irqs)) < 0) {
                        snd_printk(KERN_ERR PFX "unable to find a free IRQ\n");
                        return -EBUSY;
                }
        }
        if (dma1[dev] == SNDRV_AUTO_DMA) {
                if ((dma1[dev] = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                        snd_printk(KERN_ERR PFX "unable to find a free DMA1\n");
                        return -EBUSY;
                }
        }
        if (dma2[dev] == SNDRV_AUTO_DMA) {
                if ((dma2[dev] = snd_legacy_find_free_dma(possible_dmas)) < 0) {
                        snd_printk(KERN_ERR PFX "unable to find a free DMA2\n");
                        return -EBUSY;
                }
        }

        if (port[dev] != SNDRV_AUTO_PORT) {
                return snd_es18xx_isa_probe1(dev, pdev);
        } else {
                static unsigned long possible_ports[] = {0x220, 0x240, 0x260, 0x280};
                int i;
                for (i = 0; i < ARRAY_SIZE(possible_ports); i++) {
                        port[dev] = possible_ports[i];
                        err = snd_es18xx_isa_probe1(dev, pdev);
                        if (! err)
                                return 0;
                }
                return err;
        }
}

static int snd_es18xx_isa_remove(struct device *devptr,
                                 unsigned int dev)
{
        snd_card_free(dev_get_drvdata(devptr));
        return 0;
}

#ifdef CONFIG_PM
static int snd_es18xx_isa_suspend(struct device *dev, unsigned int n,
                                  pm_message_t state)
{
        return snd_es18xx_suspend(dev_get_drvdata(dev), state);
}

static int snd_es18xx_isa_resume(struct device *dev, unsigned int n)
{
        return snd_es18xx_resume(dev_get_drvdata(dev));
}
#endif

#define DEV_NAME "es18xx"

static struct isa_driver snd_es18xx_isa_driver = {
        .match          = snd_es18xx_isa_match,
        .probe          = snd_es18xx_isa_probe,
        .remove         = snd_es18xx_isa_remove,
#ifdef CONFIG_PM
        .suspend        = snd_es18xx_isa_suspend,
        .resume         = snd_es18xx_isa_resume,
#endif
        .driver         = {
                .name   = DEV_NAME
        },
};


#ifdef CONFIG_PNP
static int snd_audiodrive_pnp_detect(struct pnp_dev *pdev,
                                     const struct pnp_device_id *id)
{
        static int dev;
        int err;
        struct snd_card *card;

        if (pnp_device_is_isapnp(pdev))
                return -ENOENT; /* we have another procedure - card */
        for (; dev < SNDRV_CARDS; dev++) {
                if (enable[dev] && isapnp[dev])
                        break;
        }
        if (dev >= SNDRV_CARDS)
                return -ENODEV;

        err = snd_es18xx_card_new(dev, &card);
        if (err < 0)
                return err;
        if ((err = snd_audiodrive_pnp(dev, card->private_data, pdev)) < 0) {
                snd_card_free(card);
                return err;
        }
        snd_card_set_dev(card, &pdev->dev);
        if ((err = snd_audiodrive_probe(card, dev)) < 0) {
                snd_card_free(card);
                return err;
        }
        pnp_set_drvdata(pdev, card);
        dev++;
        return 0;
}

static void snd_audiodrive_pnp_remove(struct pnp_dev *pdev)
{
        snd_card_free(pnp_get_drvdata(pdev));
}

#ifdef CONFIG_PM
static int snd_audiodrive_pnp_suspend(struct pnp_dev *pdev, pm_message_t state)
{
        return snd_es18xx_suspend(pnp_get_drvdata(pdev), state);
}
static int snd_audiodrive_pnp_resume(struct pnp_dev *pdev)
{
        return snd_es18xx_resume(pnp_get_drvdata(pdev));
}
#endif

static struct pnp_driver es18xx_pnp_driver = {
        .name = "es18xx-pnpbios",
        .id_table = snd_audiodrive_pnpbiosids,
        .probe = snd_audiodrive_pnp_detect,
        .remove = snd_audiodrive_pnp_remove,
#ifdef CONFIG_PM
        .suspend = snd_audiodrive_pnp_suspend,
        .resume = snd_audiodrive_pnp_resume,
#endif
};

static int snd_audiodrive_pnpc_detect(struct pnp_card_link *pcard,
                                      const struct pnp_card_device_id *pid)
{
        static int dev;
        struct snd_card *card;
        int res;

        for ( ; dev < SNDRV_CARDS; dev++) {
                if (enable[dev] && isapnp[dev])
                        break;
        }
        if (dev >= SNDRV_CARDS)
                return -ENODEV;

        res = snd_es18xx_card_new(dev, &card);
        if (res < 0)
                return res;

        if ((res = snd_audiodrive_pnpc(dev, card->private_data, pcard, pid)) < 0) {
                snd_card_free(card);
                return res;
        }
        snd_card_set_dev(card, &pcard->card->dev);
        if ((res = snd_audiodrive_probe(card, dev)) < 0) {
                snd_card_free(card);
                return res;
        }

        pnp_set_card_drvdata(pcard, card);
        dev++;
        return 0;
}

static void snd_audiodrive_pnpc_remove(struct pnp_card_link *pcard)
{
        snd_card_free(pnp_get_card_drvdata(pcard));
        pnp_set_card_drvdata(pcard, NULL);
}

#ifdef CONFIG_PM
static int snd_audiodrive_pnpc_suspend(struct pnp_card_link *pcard, pm_message_t state)
{
        return snd_es18xx_suspend(pnp_get_card_drvdata(pcard), state);
}

static int snd_audiodrive_pnpc_resume(struct pnp_card_link *pcard)
{
        return snd_es18xx_resume(pnp_get_card_drvdata(pcard));
}

#endif

static struct pnp_card_driver es18xx_pnpc_driver = {
        .flags = PNP_DRIVER_RES_DISABLE,
        .name = "es18xx",
        .id_table = snd_audiodrive_pnpids,
        .probe = snd_audiodrive_pnpc_detect,
        .remove = snd_audiodrive_pnpc_remove,
#ifdef CONFIG_PM
        .suspend        = snd_audiodrive_pnpc_suspend,
        .resume         = snd_audiodrive_pnpc_resume,
#endif
};
#endif /* CONFIG_PNP */

static int __init alsa_card_es18xx_init(void)
{
        int err;

        err = isa_register_driver(&snd_es18xx_isa_driver, SNDRV_CARDS);
#ifdef CONFIG_PNP
        if (!err)
                isa_registered = 1;

        err = pnp_register_driver(&es18xx_pnp_driver);
        if (!err)
                pnp_registered = 1;

        err = pnp_register_card_driver(&es18xx_pnpc_driver);
        if (!err)
                pnpc_registered = 1;

        if (isa_registered || pnp_registered)
                err = 0;
#endif
        return err;
}

static void __exit alsa_card_es18xx_exit(void)
{
#ifdef CONFIG_PNP
        if (pnpc_registered)
                pnp_unregister_card_driver(&es18xx_pnpc_driver);
        if (pnp_registered)
                pnp_unregister_driver(&es18xx_pnp_driver);
        if (isa_registered)
#endif
                isa_unregister_driver(&snd_es18xx_isa_driver);
}

module_init(alsa_card_es18xx_init)
module_exit(alsa_card_es18xx_exit)