// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
 *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
 *  Version: 0.0.25
 *
 *  FEATURES currently supported:
 *    Front, Rear and Center/LFE.
 *    Surround40 and Surround51.
 *    Capture from MIC an LINE IN input.
 *    SPDIF digital playback of PCM stereo and AC3/DTS works.
 *    (One can use a standard mono mini-jack to one RCA plugs cable.
 *     or one can use a standard stereo mini-jack to two RCA plugs cable.
 *     Plug one of the RCA plugs into the Coax input of the external decoder/receiver.)
 *    ( In theory one could output 3 different AC3 streams at once, to 3 different SPDIF outputs. )
 *    Notes on how to capture sound:
 *      The AC97 is used in the PLAYBACK direction.
 *      The output from the AC97 chip, instead of reaching the speakers, is fed into the Philips 1361T ADC.
 *      So, to record from the MIC, set the MIC Playback volume to max,
 *      unmute the MIC and turn up the MASTER Playback volume.
 *      So, to prevent feedback when capturing, minimise the "Capture feedback into Playback" volume.
 *   
 *    The only playback controls that currently do anything are: -
 *    Analog Front
 *    Analog Rear
 *    Analog Center/LFE
 *    SPDIF Front
 *    SPDIF Rear
 *    SPDIF Center/LFE
 *   
 *    For capture from Mic in or Line in.
 *    Digital/Analog ( switch must be in Analog mode for CAPTURE. )
 * 
 *    CAPTURE feedback into PLAYBACK
 * 
 *  Changelog:
 *    Support interrupts per period.
 *    Removed noise from Center/LFE channel when in Analog mode.
 *    Rename and remove mixer controls.
 *  0.0.6
 *    Use separate card based DMA buffer for periods table list.
 *  0.0.7
 *    Change remove and rename ctrls into lists.
 *  0.0.8
 *    Try to fix capture sources.
 *  0.0.9
 *    Fix AC3 output.
 *    Enable S32_LE format support.
 *  0.0.10
 *    Enable playback 48000 and 96000 rates. (Rates other that these do not work, even with "plug:front".)
 *  0.0.11
 *    Add Model name recognition.
 *  0.0.12
 *    Correct interrupt timing. interrupt at end of period, instead of in the middle of a playback period.
 *    Remove redundent "voice" handling.
 *  0.0.13
 *    Single trigger call for multi channels.
 *  0.0.14
 *    Set limits based on what the sound card hardware can do.
 *    playback periods_min=2, periods_max=8
 *    capture hw constraints require period_size = n * 64 bytes.
 *    playback hw constraints require period_size = n * 64 bytes.
 *  0.0.15
 *    Minor updates.
 *  0.0.16
 *    Implement 192000 sample rate.
 *  0.0.17
 *    Add support for SB0410 and SB0413.
 *  0.0.18
 *    Modified Copyright message.
 *  0.0.19
 *    Finally fix support for SB Live 24 bit. SB0410 and SB0413.
 *    The output codec needs resetting, otherwise all output is muted.
 *  0.0.20
 *    Merge "pci_disable_device(pci);" fixes.
 *  0.0.21
 *    Add 4 capture channels. (SPDIF only comes in on channel 0. )
 *    Add SPDIF capture using optional digital I/O module for SB Live 24bit. (Analog capture does not yet work.)
 *  0.0.22
 *    Add support for MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97. From kiksen, bug #901
 *  0.0.23
 *    Implement support for Line-in capture on SB Live 24bit.
 *  0.0.24
 *    Add support for mute control on SB Live 24bit (cards w/ SPI DAC)
 *  0.0.25
 *    Powerdown SPI DAC channels when not in use
 *
 *  BUGS:
 *    Some stability problems when unloading the snd-ca0106 kernel module.
 *    --
 *
 *  TODO:
 *    4 Capture channels, only one implemented so far.
 *    Other capture rates apart from 48khz not implemented.
 *    MIDI
 *    --
 *  GENERAL INFO:
 *    Model: SB0310
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: STAC 9721
 *    ADC: Philips 1361T (Stereo 24bit)
 *    DAC: WM8746EDS (6-channel, 24bit, 192Khz)
 *
 *  GENERAL INFO:
 *    Model: SB0410
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: None
 *    ADC: WM8775EDS (4 Channel)
 *    DAC: CS4382 (114 dB, 24-Bit, 192 kHz, 8-Channel D/A Converter with DSD Support)
 *    SPDIF Out control switches between Mic in and SPDIF out.
 *    No sound out or mic input working yet.
 * 
 *  GENERAL INFO:
 *    Model: SB0413
 *    P17 Chip: CA0106-DAT
 *    AC97 Codec: None.
 *    ADC: Unknown
 *    DAC: Unknown
 *    Trying to handle it like the SB0410.
 *
 *  This code was initially based on code from ALSA's emu10k1x.c which is:
 *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
 */
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/info.h>

MODULE_AUTHOR("James Courtier-Dutton <James@superbug.demon.co.uk>");
MODULE_DESCRIPTION("CA0106");
MODULE_LICENSE("GPL");

// module parameters (see "Module Parameters")
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
static uint subsystem[SNDRV_CARDS]; /* Force card subsystem model */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the CA0106 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the CA0106 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable the CA0106 soundcard.");
module_param_array(subsystem, uint, NULL, 0444);
MODULE_PARM_DESC(subsystem, "Force card subsystem model.");

#include "ca0106.h"

static const struct snd_ca0106_details ca0106_chip_details[] = {
         /* Sound Blaster X-Fi Extreme Audio. This does not have an AC97. 53SB079000000 */
         /* It is really just a normal SB Live 24bit. */
         /* Tested:
          * See ALSA bug#3251
          */
         { .serial = 0x10131102,
           .name   = "X-Fi Extreme Audio [SBxxxx]",
           .gpio_type = 1,
           .i2c_adc = 1 } ,
         /* Sound Blaster X-Fi Extreme Audio. This does not have an AC97. 53SB079000000 */
         /* It is really just a normal SB Live 24bit. */
         /*
          * CTRL:CA0111-WTLF
          * ADC: WM8775SEDS
          * DAC: CS4382-KQZ
          */
         /* Tested:
          * Playback on front, rear, center/lfe speakers
          * Capture from Mic in.
          * Not-Tested:
          * Capture from Line in.
          * Playback to digital out.
          */
         { .serial = 0x10121102,
           .name   = "X-Fi Extreme Audio [SB0790]",
           .gpio_type = 1,
           .i2c_adc = 1 } ,
         /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
         /* AudigyLS[SB0310] */
         { .serial = 0x10021102,
           .name   = "AudigyLS [SB0310]",
           .ac97   = 1 } , 
         /* Unknown AudigyLS that also says SB0310 on it */
         { .serial = 0x10051102,
           .name   = "AudigyLS [SB0310b]",
           .ac97   = 1 } ,
         /* New Sound Blaster Live! 7.1 24bit. This does not have an AC97. 53SB041000001 */
         { .serial = 0x10061102,
           .name   = "Live! 7.1 24bit [SB0410]",
           .gpio_type = 1,
           .i2c_adc = 1 } ,
         /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
         { .serial = 0x10071102,
           .name   = "Live! 7.1 24bit [SB0413]",
           .gpio_type = 1,
           .i2c_adc = 1 } ,
         /* New Audigy SE. Has a different DAC. */
         /* SB0570:
          * CTRL:CA0106-DAT
          * ADC: WM8775EDS
          * DAC: WM8768GEDS
          */
         { .serial = 0x100a1102,
           .name   = "Audigy SE [SB0570]",
           .gpio_type = 1,
           .i2c_adc = 1,
           .spi_dac = 0x4021 } ,
         /* New Audigy LS. Has a different DAC. */
         /* SB0570:
          * CTRL:CA0106-DAT
          * ADC: WM8775EDS
          * DAC: WM8768GEDS
          */
         { .serial = 0x10111102,
           .name   = "Audigy SE OEM [SB0570a]",
           .gpio_type = 1,
           .i2c_adc = 1,
           .spi_dac = 0x4021 } ,
        /* Sound Blaster 5.1vx
         * Tested: Playback on front, rear, center/lfe speakers
         * Not-Tested: Capture
         */
        { .serial = 0x10041102,
          .name   = "Sound Blaster 5.1vx [SB1070]",
          .gpio_type = 1,
          .i2c_adc = 0,
          .spi_dac = 0x0124
         } ,
         /* MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97 */
         /* SB0438
          * CTRL:CA0106-DAT
          * ADC: WM8775SEDS
          * DAC: CS4382-KQZ
          */
         { .serial = 0x10091462,
           .name   = "MSI K8N Diamond MB [SB0438]",
           .gpio_type = 2,
           .i2c_adc = 1 } ,
         /* MSI K8N Diamond PLUS MB */
         { .serial = 0x10091102,
           .name   = "MSI K8N Diamond MB",
           .gpio_type = 2,
           .i2c_adc = 1,
           .spi_dac = 0x4021 } ,
        /* Giga-byte GA-G1975X mobo
         * Novell bnc#395807
         */
        /* FIXME: the GPIO and I2C setting aren't tested well */
        { .serial = 0x1458a006,
          .name = "Giga-byte GA-G1975X",
          .gpio_type = 1,
          .i2c_adc = 1 },
         /* Shuttle XPC SD31P which has an onboard Creative Labs
          * Sound Blaster Live! 24-bit EAX
          * high-definition 7.1 audio processor".
          * Added using info from andrewvegan in alsa bug #1298
          */
         { .serial = 0x30381297,
           .name   = "Shuttle XPC SD31P [SD31P]",
           .gpio_type = 1,
           .i2c_adc = 1 } ,
        /* Shuttle XPC SD11G5 which has an onboard Creative Labs
         * Sound Blaster Live! 24-bit EAX
         * high-definition 7.1 audio processor".
         * Fixes ALSA bug#1600
         */
        { .serial = 0x30411297,
          .name = "Shuttle XPC SD11G5 [SD11G5]",
          .gpio_type = 1,
          .i2c_adc = 1 } ,
         { .serial = 0,
           .name   = "AudigyLS [Unknown]" }
};

/* hardware definition */
static const struct snd_pcm_hardware snd_ca0106_playback_hw = {
        .info =                 SNDRV_PCM_INFO_MMAP | 
                                SNDRV_PCM_INFO_INTERLEAVED |
                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                SNDRV_PCM_INFO_MMAP_VALID |
                                SNDRV_PCM_INFO_SYNC_START,
        .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
        .rates =                (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |
                                 SNDRV_PCM_RATE_192000),
        .rate_min =             48000,
        .rate_max =             192000,
        .channels_min =         2,  //1,
        .channels_max =         2,  //6,
        .buffer_bytes_max =     ((65536 - 64) * 8),
        .period_bytes_min =     64,
        .period_bytes_max =     (65536 - 64),
        .periods_min =          2,
        .periods_max =          8,
        .fifo_size =            0,
};

static const struct snd_pcm_hardware snd_ca0106_capture_hw = {
        .info =                 (SNDRV_PCM_INFO_MMAP | 
                                 SNDRV_PCM_INFO_INTERLEAVED |
                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
                                 SNDRV_PCM_INFO_MMAP_VALID),
        .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
#if 0 /* FIXME: looks like 44.1kHz capture causes noisy output on 48kHz */
        .rates =                (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
                                 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000),
        .rate_min =             44100,
#else
        .rates =                (SNDRV_PCM_RATE_48000 |
                                 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000),
        .rate_min =             48000,
#endif /* FIXME */
        .rate_max =             192000,
        .channels_min =         2,
        .channels_max =         2,
        .buffer_bytes_max =     65536 - 128,
        .period_bytes_min =     64,
        .period_bytes_max =     32768 - 64,
        .periods_min =          2,
        .periods_max =          2,
        .fifo_size =            0,
};

unsigned int snd_ca0106_ptr_read(struct snd_ca0106 * emu, 
                                          unsigned int reg, 
                                          unsigned int chn)
{
        unsigned int regptr;
  
        regptr = (reg << 16) | chn;

        guard(spinlock_irqsave)(&emu->emu_lock);
        outl(regptr, emu->port + CA0106_PTR);
        return inl(emu->port + CA0106_DATA);
}

void snd_ca0106_ptr_write(struct snd_ca0106 *emu, 
                                   unsigned int reg, 
                                   unsigned int chn, 
                                   unsigned int data)
{
        unsigned int regptr;

        regptr = (reg << 16) | chn;

        guard(spinlock_irqsave)(&emu->emu_lock);
        outl(regptr, emu->port + CA0106_PTR);
        outl(data, emu->port + CA0106_DATA);
}

int snd_ca0106_spi_write(struct snd_ca0106 * emu,
                                   unsigned int data)
{
        unsigned int reset, set;
        unsigned int reg, tmp;
        int n, result;
        reg = SPI;
        if (data > 0xffff) /* Only 16bit values allowed */
                return 1;
        tmp = snd_ca0106_ptr_read(emu, reg, 0);
        reset = (tmp & ~0x3ffff) | 0x20000; /* Set xxx20000 */
        set = reset | 0x10000; /* Set xxx1xxxx */
        snd_ca0106_ptr_write(emu, reg, 0, reset | data);
        tmp = snd_ca0106_ptr_read(emu, reg, 0); /* write post */
        snd_ca0106_ptr_write(emu, reg, 0, set | data);
        result = 1;
        /* Wait for status bit to return to 0 */
        for (n = 0; n < 100; n++) {
                udelay(10);
                tmp = snd_ca0106_ptr_read(emu, reg, 0);
                if (!(tmp & 0x10000)) {
                        result = 0;
                        break;
                }
        }
        if (result) /* Timed out */
                return 1;
        snd_ca0106_ptr_write(emu, reg, 0, reset | data);
        tmp = snd_ca0106_ptr_read(emu, reg, 0); /* Write post */
        return 0;
}

/* The ADC does not support i2c read, so only write is implemented */
int snd_ca0106_i2c_write(struct snd_ca0106 *emu,
                                u32 reg,
                                u32 value)
{
        u32 tmp;
        int timeout = 0;
        int status;
        int retry;
        if ((reg > 0x7f) || (value > 0x1ff)) {
                dev_err(emu->card->dev, "i2c_write: invalid values.\n");
                return -EINVAL;
        }

        tmp = reg << 25 | value << 16;
        /*
        dev_dbg(emu->card->dev, "I2C-write:reg=0x%x, value=0x%x\n", reg, value);
        */
        /* Not sure what this I2C channel controls. */
        /* snd_ca0106_ptr_write(emu, I2C_D0, 0, tmp); */

        /* This controls the I2C connected to the WM8775 ADC Codec */
        snd_ca0106_ptr_write(emu, I2C_D1, 0, tmp);

        for (retry = 0; retry < 10; retry++) {
                /* Send the data to i2c */
                //tmp = snd_ca0106_ptr_read(emu, I2C_A, 0);
                //tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
                tmp = 0;
                tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
                snd_ca0106_ptr_write(emu, I2C_A, 0, tmp);

                /* Wait till the transaction ends */
                while (1) {
                        status = snd_ca0106_ptr_read(emu, I2C_A, 0);
                        /*dev_dbg(emu->card->dev, "I2C:status=0x%x\n", status);*/
                        timeout++;
                        if ((status & I2C_A_ADC_START) == 0)
                                break;

                        if (timeout > 1000)
                                break;
                }
                //Read back and see if the transaction is successful
                if ((status & I2C_A_ADC_ABORT) == 0)
                        break;
        }

        if (retry == 10) {
                dev_err(emu->card->dev, "Writing to ADC failed!\n");
                return -EINVAL;
        }
    
        return 0;
}


static void snd_ca0106_intr_enable(struct snd_ca0106 *emu, unsigned int intrenb)
{
        unsigned int intr_enable;

        guard(spinlock_irqsave)(&emu->emu_lock);
        intr_enable = inl(emu->port + CA0106_INTE) | intrenb;
        outl(intr_enable, emu->port + CA0106_INTE);
}

static void snd_ca0106_intr_disable(struct snd_ca0106 *emu, unsigned int intrenb)
{
        unsigned int intr_enable;

        guard(spinlock_irqsave)(&emu->emu_lock);
        intr_enable = inl(emu->port + CA0106_INTE) & ~intrenb;
        outl(intr_enable, emu->port + CA0106_INTE);
}


static void snd_ca0106_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
        kfree(runtime->private_data);
}

static const int spi_dacd_reg[] = {
        SPI_DACD0_REG,
        SPI_DACD1_REG,
        SPI_DACD2_REG,
        0,
        SPI_DACD4_REG,
};
static const int spi_dacd_bit[] = {
        SPI_DACD0_BIT,
        SPI_DACD1_BIT,
        SPI_DACD2_BIT,
        0,
        SPI_DACD4_BIT,
};

static void restore_spdif_bits(struct snd_ca0106 *chip, int idx)
{
        if (chip->spdif_str_bits[idx] != chip->spdif_bits[idx]) {
                chip->spdif_str_bits[idx] = chip->spdif_bits[idx];
                snd_ca0106_ptr_write(chip, SPCS0 + idx, 0,
                                     chip->spdif_str_bits[idx]);
        }
}

static int snd_ca0106_channel_dac(struct snd_ca0106 *chip,
                                  const struct snd_ca0106_details *details,
                                  int channel_id)
{
        switch (channel_id) {
        case PCM_FRONT_CHANNEL:
                return (details->spi_dac & 0xf000) >> (4 * 3);
        case PCM_REAR_CHANNEL:
                return (details->spi_dac & 0x0f00) >> (4 * 2);
        case PCM_CENTER_LFE_CHANNEL:
                return (details->spi_dac & 0x00f0) >> (4 * 1);
        case PCM_UNKNOWN_CHANNEL:
                return (details->spi_dac & 0x000f) >> (4 * 0);
        default:
                dev_dbg(chip->card->dev, "ca0106: unknown channel_id %d\n",
                           channel_id);
        }
        return 0;
}

static int snd_ca0106_pcm_power_dac(struct snd_ca0106 *chip, int channel_id,
                                    int power)
{
        if (chip->details->spi_dac) {
                const int dac = snd_ca0106_channel_dac(chip, chip->details,
                                                       channel_id);
                const int reg = spi_dacd_reg[dac];
                const int bit = spi_dacd_bit[dac];

                if (power)
                        /* Power up */
                        chip->spi_dac_reg[reg] &= ~bit;
                else
                        /* Power down */
                        chip->spi_dac_reg[reg] |= bit;
                if (snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]) != 0)
                        return -ENXIO;
        }
        return 0;
}

/* open_playback callback */
static int snd_ca0106_pcm_open_playback_channel(struct snd_pcm_substream *substream,
                                                int channel_id)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_ca0106_channel *channel = &(chip->playback_channels[channel_id]);
        struct snd_ca0106_pcm *epcm;
        struct snd_pcm_runtime *runtime = substream->runtime;
        int err;

        epcm = kzalloc_obj(*epcm);

        if (epcm == NULL)
                return -ENOMEM;
        epcm->emu = chip;
        epcm->substream = substream;
        epcm->channel_id=channel_id;
  
        runtime->private_data = epcm;
        runtime->private_free = snd_ca0106_pcm_free_substream;
  
        runtime->hw = snd_ca0106_playback_hw;

        channel->emu = chip;
        channel->number = channel_id;

        channel->use = 1;
        /*
        dev_dbg(chip->card->dev, "open:channel_id=%d, chip=%p, channel=%p\n",
               channel_id, chip, channel);
        */
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
        channel->epcm = epcm;
        err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
        if (err < 0)
                return err;
        err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
        if (err < 0)
                return err;
        snd_pcm_set_sync(substream);

        /* Front channel dac should already be on */
        if (channel_id != PCM_FRONT_CHANNEL) {
                err = snd_ca0106_pcm_power_dac(chip, channel_id, 1);
                if (err < 0)
                        return err;
        }

        restore_spdif_bits(chip, channel_id);

        return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_playback(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        chip->playback_channels[epcm->channel_id].use = 0;

        restore_spdif_bits(chip, epcm->channel_id);

        /* Front channel dac should stay on */
        if (epcm->channel_id != PCM_FRONT_CHANNEL) {
                int err;
                err = snd_ca0106_pcm_power_dac(chip, epcm->channel_id, 0);
                if (err < 0)
                        return err;
        }

        /* FIXME: maybe zero others */
        return 0;
}

static int snd_ca0106_pcm_open_playback_front(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_center_lfe(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_playback_channel(substream, PCM_CENTER_LFE_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_unknown(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_rear(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL);
}

/* open_capture callback */
static int snd_ca0106_pcm_open_capture_channel(struct snd_pcm_substream *substream,
                                               int channel_id)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_ca0106_channel *channel = &(chip->capture_channels[channel_id]);
        struct snd_ca0106_pcm *epcm;
        struct snd_pcm_runtime *runtime = substream->runtime;
        int err;

        epcm = kzalloc_obj(*epcm);
        if (!epcm)
                return -ENOMEM;

        epcm->emu = chip;
        epcm->substream = substream;
        epcm->channel_id=channel_id;
  
        runtime->private_data = epcm;
        runtime->private_free = snd_ca0106_pcm_free_substream;
  
        runtime->hw = snd_ca0106_capture_hw;

        channel->emu = chip;
        channel->number = channel_id;

        channel->use = 1;
        /*
        dev_dbg(chip->card->dev, "open:channel_id=%d, chip=%p, channel=%p\n",
               channel_id, chip, channel);
        */
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
        channel->epcm = epcm;
        err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
        if (err < 0)
                return err;
        //snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
        err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64);
        if (err < 0)
                return err;
        return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_capture(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        chip->capture_channels[epcm->channel_id].use = 0;
        /* FIXME: maybe zero others */
        return 0;
}

static int snd_ca0106_pcm_open_0_capture(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_capture_channel(substream, 0);
}

static int snd_ca0106_pcm_open_1_capture(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_capture_channel(substream, 1);
}

static int snd_ca0106_pcm_open_2_capture(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_capture_channel(substream, 2);
}

static int snd_ca0106_pcm_open_3_capture(struct snd_pcm_substream *substream)
{
        return snd_ca0106_pcm_open_capture_channel(substream, 3);
}

/* prepare playback callback */
static int snd_ca0106_pcm_prepare_playback(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        int channel = epcm->channel_id;
        u32 *table_base = (u32 *)(emu->buffer->area+(8*16*channel));
        u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
        u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
        u32 hcfg_set = 0x00000000;
        u32 hcfg;
        u32 reg40_mask = 0x30000 << (channel<<1);
        u32 reg40_set = 0;
        u32 reg40;
        /* FIXME: Depending on mixer selection of SPDIF out or not, select the spdif rate or the DAC rate. */
        u32 reg71_mask = 0x03030000 ; /* Global. Set SPDIF rate. We only support 44100 to spdif, not to DAC. */
        u32 reg71_set = 0;
        u32 reg71;
        int i;
        
#if 0 /* debug */
        dev_dbg(emu->card->dev,
                   "prepare:channel_number=%d, rate=%d, format=0x%x, "
                   "channels=%d, buffer_size=%ld, period_size=%ld, "
                   "periods=%u, frames_to_bytes=%d\n",
                   channel, runtime->rate, runtime->format,
                   runtime->channels, runtime->buffer_size,
                   runtime->period_size, runtime->periods,
                   frames_to_bytes(runtime, 1));
        dev_dbg(emu->card->dev,
                "dma_addr=%x, dma_area=%p, table_base=%p\n",
                   runtime->dma_addr, runtime->dma_area, table_base);
        dev_dbg(emu->card->dev,
                "dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",
                   emu->buffer->addr, emu->buffer->area, emu->buffer->bytes);
#endif /* debug */
        /* Rate can be set per channel. */
        /* reg40 control host to fifo */
        /* reg71 controls DAC rate. */
        switch (runtime->rate) {
        case 44100:
                reg40_set = 0x10000 << (channel<<1);
                reg71_set = 0x01010000; 
                break;
        case 48000:
                reg40_set = 0;
                reg71_set = 0; 
                break;
        case 96000:
                reg40_set = 0x20000 << (channel<<1);
                reg71_set = 0x02020000; 
                break;
        case 192000:
                reg40_set = 0x30000 << (channel<<1);
                reg71_set = 0x03030000; 
                break;
        default:
                reg40_set = 0;
                reg71_set = 0; 
                break;
        }
        /* Format is a global setting */
        /* FIXME: Only let the first channel accessed set this. */
        switch (runtime->format) {
        case SNDRV_PCM_FORMAT_S16_LE:
                hcfg_set = 0;
                break;
        case SNDRV_PCM_FORMAT_S32_LE:
                hcfg_set = HCFG_PLAYBACK_S32_LE;
                break;
        default:
                hcfg_set = 0;
                break;
        }
        hcfg = inl(emu->port + CA0106_HCFG) ;
        hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
        outl(hcfg, emu->port + CA0106_HCFG);
        reg40 = snd_ca0106_ptr_read(emu, 0x40, 0);
        reg40 = (reg40 & ~reg40_mask) | reg40_set;
        snd_ca0106_ptr_write(emu, 0x40, 0, reg40);
        reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
        reg71 = (reg71 & ~reg71_mask) | reg71_set;
        snd_ca0106_ptr_write(emu, 0x71, 0, reg71);

        /* FIXME: Check emu->buffer->size before actually writing to it. */
        for(i=0; i < runtime->periods; i++) {
                table_base[i*2] = runtime->dma_addr + (i * period_size_bytes);
                table_base[i*2+1] = period_size_bytes << 16;
        }
 
        snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer->addr+(8*16*channel));
        snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
        snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
        snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
        snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
        /* FIXME  test what 0 bytes does. */
        snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
        snd_ca0106_ptr_write(emu, PLAYBACK_POINTER, channel, 0);
        snd_ca0106_ptr_write(emu, 0x07, channel, 0x0);
        snd_ca0106_ptr_write(emu, 0x08, channel, 0);
        snd_ca0106_ptr_write(emu, PLAYBACK_MUTE, 0x0, 0x0); /* Unmute output */
#if 0
        snd_ca0106_ptr_write(emu, SPCS0, 0,
                               SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
                               SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
                               SPCS_GENERATIONSTATUS | 0x00001200 |
                               0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT );
#endif

        return 0;
}

/* prepare capture callback */
static int snd_ca0106_pcm_prepare_capture(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        int channel = epcm->channel_id;
        u32 hcfg_mask = HCFG_CAPTURE_S32_LE;
        u32 hcfg_set = 0x00000000;
        u32 hcfg;
        u32 over_sampling=0x2;
        u32 reg71_mask = 0x0000c000 ; /* Global. Set ADC rate. */
        u32 reg71_set = 0;
        u32 reg71;
        
#if 0 /* debug */
        dev_dbg(emu->card->dev,
                   "prepare:channel_number=%d, rate=%d, format=0x%x, "
                   "channels=%d, buffer_size=%ld, period_size=%ld, "
                   "periods=%u, frames_to_bytes=%d\n",
                   channel, runtime->rate, runtime->format,
                   runtime->channels, runtime->buffer_size,
                   runtime->period_size, runtime->periods,
                   frames_to_bytes(runtime, 1));
        dev_dbg(emu->card->dev,
                "dma_addr=%x, dma_area=%p, table_base=%p\n",
                   runtime->dma_addr, runtime->dma_area, table_base);
        dev_dbg(emu->card->dev,
                "dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",
                   emu->buffer->addr, emu->buffer->area, emu->buffer->bytes);
#endif /* debug */
        /* reg71 controls ADC rate. */
        switch (runtime->rate) {
        case 44100:
                reg71_set = 0x00004000;
                break;
        case 48000:
                reg71_set = 0; 
                break;
        case 96000:
                reg71_set = 0x00008000;
                over_sampling=0xa;
                break;
        case 192000:
                reg71_set = 0x0000c000; 
                over_sampling=0xa;
                break;
        default:
                reg71_set = 0; 
                break;
        }
        /* Format is a global setting */
        /* FIXME: Only let the first channel accessed set this. */
        switch (runtime->format) {
        case SNDRV_PCM_FORMAT_S16_LE:
                hcfg_set = 0;
                break;
        case SNDRV_PCM_FORMAT_S32_LE:
                hcfg_set = HCFG_CAPTURE_S32_LE;
                break;
        default:
                hcfg_set = 0;
                break;
        }
        hcfg = inl(emu->port + CA0106_HCFG) ;
        hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
        outl(hcfg, emu->port + CA0106_HCFG);
        reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
        reg71 = (reg71 & ~reg71_mask) | reg71_set;
        snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
        if (emu->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
                snd_ca0106_i2c_write(emu, ADC_MASTER, over_sampling); /* Adjust the over sampler to better suit the capture rate. */
        }


        /*
        dev_dbg(emu->card->dev,
               "prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, "
               "buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",
               channel, runtime->rate, runtime->format, runtime->channels,
               runtime->buffer_size, runtime->period_size,
               frames_to_bytes(runtime, 1));
        */
        snd_ca0106_ptr_write(emu, 0x13, channel, 0);
        snd_ca0106_ptr_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
        snd_ca0106_ptr_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
        snd_ca0106_ptr_write(emu, CAPTURE_POINTER, channel, 0);

        return 0;
}

/* trigger_playback callback */
static int snd_ca0106_pcm_trigger_playback(struct snd_pcm_substream *substream,
                                    int cmd)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime;
        struct snd_ca0106_pcm *epcm;
        int channel;
        int result = 0;
        struct snd_pcm_substream *s;
        u32 basic = 0;
        u32 extended = 0;
        u32 bits;
        int running = 0;

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                running = 1;
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
        default:
                running = 0;
                break;
        }
        snd_pcm_group_for_each_entry(s, substream) {
                if (snd_pcm_substream_chip(s) != emu ||
                    s->stream != SNDRV_PCM_STREAM_PLAYBACK)
                        continue;
                runtime = s->runtime;
                epcm = runtime->private_data;
                channel = epcm->channel_id;
                /* dev_dbg(emu->card->dev, "channel=%d\n", channel); */
                epcm->running = running;
                basic |= (0x1 << channel);
                extended |= (0x10 << channel);
                snd_pcm_trigger_done(s, substream);
        }
        /* dev_dbg(emu->card->dev, "basic=0x%x, extended=0x%x\n",basic, extended); */

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
        case SNDRV_PCM_TRIGGER_RESUME:
                bits = snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0);
                bits |= extended;
                snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, bits);
                bits = snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0);
                bits |= basic;
                snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, bits);
                break;
        case SNDRV_PCM_TRIGGER_STOP:
        case SNDRV_PCM_TRIGGER_SUSPEND:
                bits = snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0);
                bits &= ~basic;
                snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, bits);
                bits = snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0);
                bits &= ~extended;
                snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, bits);
                break;
        default:
                result = -EINVAL;
                break;
        }
        return result;
}

/* trigger_capture callback */
static int snd_ca0106_pcm_trigger_capture(struct snd_pcm_substream *substream,
                                    int cmd)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        int channel = epcm->channel_id;
        int result = 0;

        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:
                snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
                snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
                epcm->running = 1;
                break;
        case SNDRV_PCM_TRIGGER_STOP:
                snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
                snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
                epcm->running = 0;
                break;
        default:
                result = -EINVAL;
                break;
        }
        return result;
}

/* pointer_playback callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_playback(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        unsigned int ptr, prev_ptr;
        int channel = epcm->channel_id;
        int timeout = 10;

        if (!epcm->running)
                return 0;

        prev_ptr = -1;
        do {
                ptr = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
                ptr = (ptr >> 3) * runtime->period_size;
                ptr += bytes_to_frames(runtime,
                        snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel));
                if (ptr >= runtime->buffer_size)
                        ptr -= runtime->buffer_size;
                if (prev_ptr == ptr)
                        return ptr;
                prev_ptr = ptr;
        } while (--timeout);
        dev_warn(emu->card->dev, "ca0106: unstable DMA pointer!\n");
        return 0;
}

/* pointer_capture callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_capture(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
        int channel = epcm->channel_id;

        if (!epcm->running)
                return 0;

        ptr1 = snd_ca0106_ptr_read(emu, CAPTURE_POINTER, channel);
        ptr2 = bytes_to_frames(runtime, ptr1);
        ptr=ptr2;
        if (ptr >= runtime->buffer_size)
                ptr -= runtime->buffer_size;
        /*
        dev_dbg(emu->card->dev, "ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, "
               "buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n",
               ptr1, ptr2, ptr, (int)runtime->buffer_size,
               (int)runtime->period_size, (int)runtime->frame_bits,
               (int)runtime->rate);
        */
        return ptr;
}

/* operators */
static const struct snd_pcm_ops snd_ca0106_playback_front_ops = {
        .open =        snd_ca0106_pcm_open_playback_front,
        .close =       snd_ca0106_pcm_close_playback,
        .prepare =     snd_ca0106_pcm_prepare_playback,
        .trigger =     snd_ca0106_pcm_trigger_playback,
        .pointer =     snd_ca0106_pcm_pointer_playback,
};

static const struct snd_pcm_ops snd_ca0106_capture_0_ops = {
        .open =        snd_ca0106_pcm_open_0_capture,
        .close =       snd_ca0106_pcm_close_capture,
        .prepare =     snd_ca0106_pcm_prepare_capture,
        .trigger =     snd_ca0106_pcm_trigger_capture,
        .pointer =     snd_ca0106_pcm_pointer_capture,
};

static const struct snd_pcm_ops snd_ca0106_capture_1_ops = {
        .open =        snd_ca0106_pcm_open_1_capture,
        .close =       snd_ca0106_pcm_close_capture,
        .prepare =     snd_ca0106_pcm_prepare_capture,
        .trigger =     snd_ca0106_pcm_trigger_capture,
        .pointer =     snd_ca0106_pcm_pointer_capture,
};

static const struct snd_pcm_ops snd_ca0106_capture_2_ops = {
        .open =        snd_ca0106_pcm_open_2_capture,
        .close =       snd_ca0106_pcm_close_capture,
        .prepare =     snd_ca0106_pcm_prepare_capture,
        .trigger =     snd_ca0106_pcm_trigger_capture,
        .pointer =     snd_ca0106_pcm_pointer_capture,
};

static const struct snd_pcm_ops snd_ca0106_capture_3_ops = {
        .open =        snd_ca0106_pcm_open_3_capture,
        .close =       snd_ca0106_pcm_close_capture,
        .prepare =     snd_ca0106_pcm_prepare_capture,
        .trigger =     snd_ca0106_pcm_trigger_capture,
        .pointer =     snd_ca0106_pcm_pointer_capture,
};

static const struct snd_pcm_ops snd_ca0106_playback_center_lfe_ops = {
        .open =         snd_ca0106_pcm_open_playback_center_lfe,
        .close =        snd_ca0106_pcm_close_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static const struct snd_pcm_ops snd_ca0106_playback_unknown_ops = {
        .open =         snd_ca0106_pcm_open_playback_unknown,
        .close =        snd_ca0106_pcm_close_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static const struct snd_pcm_ops snd_ca0106_playback_rear_ops = {
        .open =         snd_ca0106_pcm_open_playback_rear,
        .close =        snd_ca0106_pcm_close_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};


static unsigned short snd_ca0106_ac97_read(struct snd_ac97 *ac97,
                                             unsigned short reg)
{
        struct snd_ca0106 *emu = ac97->private_data;

        guard(spinlock_irqsave)(&emu->emu_lock);
        outb(reg, emu->port + CA0106_AC97ADDRESS);
        return inw(emu->port + CA0106_AC97DATA);
}

static void snd_ca0106_ac97_write(struct snd_ac97 *ac97,
                                    unsigned short reg, unsigned short val)
{
        struct snd_ca0106 *emu = ac97->private_data;
  
        guard(spinlock_irqsave)(&emu->emu_lock);
        outb(reg, emu->port + CA0106_AC97ADDRESS);
        outw(val, emu->port + CA0106_AC97DATA);
}

static int snd_ca0106_ac97(struct snd_ca0106 *chip)
{
        struct snd_ac97_bus *pbus;
        struct snd_ac97_template ac97;
        int err;
        static const struct snd_ac97_bus_ops ops = {
                .write = snd_ca0106_ac97_write,
                .read = snd_ca0106_ac97_read,
        };
  
        err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus);
        if (err < 0)
                return err;
        pbus->no_vra = 1; /* we don't need VRA */

        memset(&ac97, 0, sizeof(ac97));
        ac97.private_data = chip;
        ac97.scaps = AC97_SCAP_NO_SPDIF;
        return snd_ac97_mixer(pbus, &ac97, &chip->ac97);
}

static void ca0106_stop_chip(struct snd_ca0106 *chip);

static void snd_ca0106_free(struct snd_card *card)
{
        struct snd_ca0106 *chip = card->private_data;

        ca0106_stop_chip(chip);
}

static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id)
{
        unsigned int status;

        struct snd_ca0106 *chip = dev_id;
        int i;
        int mask;
        unsigned int stat76;
        struct snd_ca0106_channel *pchannel;

        status = inl(chip->port + CA0106_IPR);
        if (! status)
                return IRQ_NONE;

        stat76 = snd_ca0106_ptr_read(chip, EXTENDED_INT, 0);
        /*
        dev_dbg(emu->card->dev, "interrupt status = 0x%08x, stat76=0x%08x\n",
                   status, stat76);
        dev_dbg(emu->card->dev, "ptr=0x%08x\n",
                   snd_ca0106_ptr_read(chip, PLAYBACK_POINTER, 0));
        */
        mask = 0x11; /* 0x1 for one half, 0x10 for the other half period. */
        for(i = 0; i < 4; i++) {
                pchannel = &(chip->playback_channels[i]);
                if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
                        if(pchannel->use) {
                                snd_pcm_period_elapsed(pchannel->epcm->substream);
                                /* dev_dbg(emu->card->dev, "interrupt [%d] used\n", i); */
                        }
                }
                /*
                dev_dbg(emu->card->dev, "channel=%p\n", pchannel);
                dev_dbg(emu->card->dev, "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
                */
                mask <<= 1;
        }
        mask = 0x110000; /* 0x1 for one half, 0x10 for the other half period. */
        for(i = 0; i < 4; i++) {
                pchannel = &(chip->capture_channels[i]);
                if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
                        if(pchannel->use) {
                                snd_pcm_period_elapsed(pchannel->epcm->substream);
                                /* dev_dbg(emu->card->dev, "interrupt [%d] used\n", i); */
                        }
                }
                /*
                dev_dbg(emu->card->dev, "channel=%p\n", pchannel);
                dev_dbg(emu->card->dev, "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
                */
                mask <<= 1;
        }

        snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);

        if (chip->midi.dev_id &&
            (status & (chip->midi.ipr_tx|chip->midi.ipr_rx))) {
                if (chip->midi.interrupt)
                        chip->midi.interrupt(&chip->midi, status);
                else
                        chip->midi.interrupt_disable(&chip->midi, chip->midi.tx_enable | chip->midi.rx_enable);
        }

        // acknowledge the interrupt if necessary
        outl(status, chip->port + CA0106_IPR);

        return IRQ_HANDLED;
}

static const struct snd_pcm_chmap_elem surround_map[] = {
        { .channels = 2,
          .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },
        { }
};

static const struct snd_pcm_chmap_elem clfe_map[] = {
        { .channels = 2,
          .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },
        { }
};

static const struct snd_pcm_chmap_elem side_map[] = {
        { .channels = 2,
          .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },
        { }
};

static int snd_ca0106_pcm(struct snd_ca0106 *emu, int device)
{
        struct snd_pcm *pcm;
        struct snd_pcm_substream *substream;
        const struct snd_pcm_chmap_elem *map = NULL;
        int err;
  
        err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm);
        if (err < 0)
                return err;
  
        pcm->private_data = emu;

        switch (device) {
        case 0:
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
          map = snd_pcm_std_chmaps;
          break;
        case 1:
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
          map = surround_map;
          break;
        case 2:
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
          map = clfe_map;
          break;
        case 3:
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
          snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
          map = side_map;
          break;
        }

        pcm->info_flags = 0;
        strscpy(pcm->name, "CA0106");

        for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; 
            substream; 
            substream = substream->next) {
                snd_pcm_set_managed_buffer(substream, SNDRV_DMA_TYPE_DEV,
                                           &emu->pci->dev,
                                           64*1024, 64*1024);
        }

        for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 
              substream; 
              substream = substream->next) {
                snd_pcm_set_managed_buffer(substream, SNDRV_DMA_TYPE_DEV,
                                           &emu->pci->dev,
                                           64*1024, 64*1024);
        }
  
        err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, 2,
                                     1 << 2, NULL);
        if (err < 0)
                return err;

        emu->pcm[device] = pcm;
  
        return 0;
}

#define SPI_REG(reg, value)     (((reg) << SPI_REG_SHIFT) | (value))
static const unsigned int spi_dac_init[] = {
        SPI_REG(SPI_LDA1_REG,   SPI_DA_BIT_0dB), /* 0dB dig. attenuation */
        SPI_REG(SPI_RDA1_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_PL_REG,     SPI_PL_BIT_L_L | SPI_PL_BIT_R_R | SPI_IZD_BIT),
        SPI_REG(SPI_FMT_REG,    SPI_FMT_BIT_I2S | SPI_IWL_BIT_24),
        SPI_REG(SPI_LDA2_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_RDA2_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_LDA3_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_RDA3_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_MASTDA_REG, SPI_DA_BIT_0dB),
        SPI_REG(9,              0x00),
        SPI_REG(SPI_MS_REG,     SPI_DACD0_BIT | SPI_DACD1_BIT | SPI_DACD2_BIT),
        SPI_REG(12,             0x00),
        SPI_REG(SPI_LDA4_REG,   SPI_DA_BIT_0dB),
        SPI_REG(SPI_RDA4_REG,   SPI_DA_BIT_0dB | SPI_DA_BIT_UPDATE),
        SPI_REG(SPI_DACD4_REG,  SPI_DACD4_BIT),
};

static const unsigned int i2c_adc_init[][2] = {
        { 0x17, 0x00 }, /* Reset */
        { 0x07, 0x00 }, /* Timeout */
        { 0x0b, 0x22 },  /* Interface control */
        { 0x0c, 0x22 },  /* Master mode control */
        { 0x0d, 0x08 },  /* Powerdown control */
        { 0x0e, 0xcf },  /* Attenuation Left  0x01 = -103dB, 0xff = 24dB */
        { 0x0f, 0xcf },  /* Attenuation Right 0.5dB steps */
        { 0x10, 0x7b },  /* ALC Control 1 */
        { 0x11, 0x00 },  /* ALC Control 2 */
        { 0x12, 0x32 },  /* ALC Control 3 */
        { 0x13, 0x00 },  /* Noise gate control */
        { 0x14, 0xa6 },  /* Limiter control */
        { 0x15, ADC_MUX_LINEIN },  /* ADC Mixer control */
};

static void ca0106_init_chip(struct snd_ca0106 *chip, int resume)
{
        int ch;
        unsigned int def_bits;

        outl(0, chip->port + CA0106_INTE);

        /*
         *  Init to 0x02109204 :
         *  Clock accuracy    = 0     (1000ppm)
         *  Sample Rate       = 2     (48kHz)
         *  Audio Channel     = 1     (Left of 2)
         *  Source Number     = 0     (Unspecified)
         *  Generation Status = 1     (Original for Cat Code 12)
         *  Cat Code          = 12    (Digital Signal Mixer)
         *  Mode              = 0     (Mode 0)
         *  Emphasis          = 0     (None)
         *  CP                = 1     (Copyright unasserted)
         *  AN                = 0     (Audio data)
         *  P                 = 0     (Consumer)
         */
        def_bits =
                SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
                SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
                SPCS_GENERATIONSTATUS | 0x00001200 |
                0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT;
        if (!resume) {
                chip->spdif_str_bits[0] = chip->spdif_bits[0] = def_bits;
                chip->spdif_str_bits[1] = chip->spdif_bits[1] = def_bits;
                chip->spdif_str_bits[2] = chip->spdif_bits[2] = def_bits;
                chip->spdif_str_bits[3] = chip->spdif_bits[3] = def_bits;
        }
        /* Only SPCS1 has been tested */
        snd_ca0106_ptr_write(chip, SPCS1, 0, chip->spdif_str_bits[1]);
        snd_ca0106_ptr_write(chip, SPCS0, 0, chip->spdif_str_bits[0]);
        snd_ca0106_ptr_write(chip, SPCS2, 0, chip->spdif_str_bits[2]);
        snd_ca0106_ptr_write(chip, SPCS3, 0, chip->spdif_str_bits[3]);

        snd_ca0106_ptr_write(chip, PLAYBACK_MUTE, 0, 0x00fc0000);
        snd_ca0106_ptr_write(chip, CAPTURE_MUTE, 0, 0x00fc0000);

        /* Write 0x8000 to AC97_REC_GAIN to mute it. */
        outb(AC97_REC_GAIN, chip->port + CA0106_AC97ADDRESS);
        outw(0x8000, chip->port + CA0106_AC97DATA);
#if 0 /* FIXME: what are these? */
        snd_ca0106_ptr_write(chip, SPCS0, 0, 0x2108006);
        snd_ca0106_ptr_write(chip, 0x42, 0, 0x2108006);
        snd_ca0106_ptr_write(chip, 0x43, 0, 0x2108006);
        snd_ca0106_ptr_write(chip, 0x44, 0, 0x2108006);
#endif

        /* OSS drivers set this. */
        /* snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0xf0f003f); */

        /* Analog or Digital output */
        snd_ca0106_ptr_write(chip, SPDIF_SELECT1, 0, 0xf);
        /* 0x0b000000 for digital, 0x000b0000 for analog, from win2000 drivers.
         * Use 0x000f0000 for surround71
         */
        snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0x000f0000);

        chip->spdif_enable = 0; /* Set digital SPDIF output off */
        /*snd_ca0106_ptr_write(chip, 0x45, 0, 0);*/ /* Analogue out */
        /*snd_ca0106_ptr_write(chip, 0x45, 0, 0xf00);*/ /* Digital out */

        /* goes to 0x40c80000 when doing SPDIF IN/OUT */
        snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 0, 0x40c81000);
        /* (Mute) CAPTURE feedback into PLAYBACK volume.
         * Only lower 16 bits matter.
         */
        snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 1, 0xffffffff);
        /* SPDIF IN Volume */
        snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 2, 0x30300000);
        /* SPDIF IN Volume, 0x70 = (vol & 0x3f) | 0x40 */
        snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 3, 0x00700000);

        snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING1, 0, 0x32765410);
        snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING2, 0, 0x76767676);
        snd_ca0106_ptr_write(chip, CAPTURE_ROUTING1, 0, 0x32765410);
        snd_ca0106_ptr_write(chip, CAPTURE_ROUTING2, 0, 0x76767676);

        for (ch = 0; ch < 4; ch++) {
                /* Only high 16 bits matter */
                snd_ca0106_ptr_write(chip, CAPTURE_VOLUME1, ch, 0x30303030);
                snd_ca0106_ptr_write(chip, CAPTURE_VOLUME2, ch, 0x30303030);
#if 0 /* Mute */
                snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0x40404040);
                snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0x40404040);
                snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0xffffffff);
                snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0xffffffff);
#endif
        }
        if (chip->details->i2c_adc == 1) {
                /* Select MIC, Line in, TAD in, AUX in */
                snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x333300e4);
                /* Default to CAPTURE_SOURCE to i2s in */
                if (!resume)
                        chip->capture_source = 3;
        } else if (chip->details->ac97 == 1) {
                /* Default to AC97 in */
                snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x444400e4);
                /* Default to CAPTURE_SOURCE to AC97 in */
                if (!resume)
                        chip->capture_source = 4;
        } else {
                /* Select MIC, Line in, TAD in, AUX in */
                snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x333300e4);
                /* Default to Set CAPTURE_SOURCE to i2s in */
                if (!resume)
                        chip->capture_source = 3;
        }

        if (chip->details->gpio_type == 2) {
                /* The SB0438 use GPIO differently. */
                /* FIXME: Still need to find out what the other GPIO bits do.
                 * E.g. For digital spdif out.
                 */
                outl(0x0, chip->port + CA0106_GPIO);
                /* outl(0x00f0e000, chip->port + CA0106_GPIO); */ /* Analog */
                outl(0x005f5301, chip->port + CA0106_GPIO); /* Analog */
        } else if (chip->details->gpio_type == 1) {
                /* The SB0410 and SB0413 use GPIO differently. */
                /* FIXME: Still need to find out what the other GPIO bits do.
                 * E.g. For digital spdif out.
                 */
                outl(0x0, chip->port + CA0106_GPIO);
                /* outl(0x00f0e000, chip->port + CA0106_GPIO); */ /* Analog */
                outl(0x005f5301, chip->port + CA0106_GPIO); /* Analog */
        } else {
                outl(0x0, chip->port + CA0106_GPIO);
                outl(0x005f03a3, chip->port + CA0106_GPIO); /* Analog */
                /* outl(0x005f02a2, chip->port + CA0106_GPIO); */ /* SPDIF */
        }
        snd_ca0106_intr_enable(chip, 0x105); /* Win2000 uses 0x1e0 */

        /* outl(HCFG_LOCKSOUNDCACHE|HCFG_AUDIOENABLE, chip->port+HCFG); */
        /* 0x1000 causes AC3 to fails. Maybe it effects 24 bit output. */
        /* outl(0x00001409, chip->port + CA0106_HCFG); */
        /* outl(0x00000009, chip->port + CA0106_HCFG); */
        /* AC97 2.0, Enable outputs. */
        outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port + CA0106_HCFG);

        if (chip->details->i2c_adc == 1) {
                /* The SB0410 and SB0413 use I2C to control ADC. */
                int size, n;

                size = ARRAY_SIZE(i2c_adc_init);
                /* dev_dbg(emu->card->dev, "I2C:array size=0x%x\n", size); */
                for (n = 0; n < size; n++)
                        snd_ca0106_i2c_write(chip, i2c_adc_init[n][0],
                                             i2c_adc_init[n][1]);
                for (n = 0; n < 4; n++) {
                        chip->i2c_capture_volume[n][0] = 0xcf;
                        chip->i2c_capture_volume[n][1] = 0xcf;
                }
                chip->i2c_capture_source = 2; /* Line in */
                /* Enable Line-in capture. MIC in currently untested. */
                /* snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); */
        }

        if (chip->details->spi_dac) {
                /* The SB0570 use SPI to control DAC. */
                int size, n;

                size = ARRAY_SIZE(spi_dac_init);
                for (n = 0; n < size; n++) {
                        int reg = spi_dac_init[n] >> SPI_REG_SHIFT;

                        snd_ca0106_spi_write(chip, spi_dac_init[n]);
                        if (reg < ARRAY_SIZE(chip->spi_dac_reg))
                                chip->spi_dac_reg[reg] = spi_dac_init[n];
                }

                /* Enable front dac only */
                snd_ca0106_pcm_power_dac(chip, PCM_FRONT_CHANNEL, 1);
        }
}

static void ca0106_stop_chip(struct snd_ca0106 *chip)
{
        /* disable interrupts */
        snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
        outl(0, chip->port + CA0106_INTE);
        snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
        udelay(1000);
        /* disable audio */
        /* outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG); */
        outl(0, chip->port + CA0106_HCFG);
        /* FIXME: We need to stop and DMA transfers here.
         *        But as I am not sure how yet, we cannot from the dma pages.
         * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
         */
}

static int snd_ca0106_create(int dev, struct snd_card *card,
                             struct pci_dev *pci)
{
        struct snd_ca0106 *chip = card->private_data;
        const struct snd_ca0106_details *c;
        int err;

        err = pcim_enable_device(pci);
        if (err < 0)
                return err;
        if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
                dev_err(card->dev, "error to set 32bit mask DMA\n");
                return -ENXIO;
        }

        chip->card = card;
        chip->pci = pci;
        chip->irq = -1;

        spin_lock_init(&chip->emu_lock);

        err = pcim_request_all_regions(pci, "snd_ca0106");
        if (err < 0)
                return err;
        chip->port = pci_resource_start(pci, 0);

        if (devm_request_irq(&pci->dev, pci->irq, snd_ca0106_interrupt,
                             IRQF_SHARED, KBUILD_MODNAME, chip)) {
                dev_err(card->dev, "cannot grab irq\n");
                return -EBUSY;
        }
        chip->irq = pci->irq;
        card->sync_irq = chip->irq;

        /* This stores the periods table. */
        chip->buffer = snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV, 1024);
        if (!chip->buffer)
                return -ENOMEM;

        pci_set_master(pci);
        /* read serial */
        pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
        pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
        dev_info(card->dev, "Model %04x Rev %08x Serial %08x\n",
               chip->model, pci->revision, chip->serial);
        strscpy(card->driver, "CA0106");
        strscpy(card->shortname, "CA0106");

        for (c = ca0106_chip_details; c->serial; c++) {
                if (subsystem[dev]) {
                        if (c->serial == subsystem[dev])
                                break;
                } else if (c->serial == chip->serial)
                        break;
        }
        chip->details = c;
        if (subsystem[dev]) {
                dev_info(card->dev, "Sound card name=%s, "
                       "subsystem=0x%x. Forced to subsystem=0x%x\n",
                       c->name, chip->serial, subsystem[dev]);
        }

        sprintf(card->longname, "%s at 0x%lx irq %i",
                c->name, chip->port, chip->irq);

        ca0106_init_chip(chip, 0);
        return 0;
}


static void ca0106_midi_interrupt_enable(struct snd_ca_midi *midi, int intr)
{
        snd_ca0106_intr_enable((struct snd_ca0106 *)(midi->dev_id), intr);
}

static void ca0106_midi_interrupt_disable(struct snd_ca_midi *midi, int intr)
{
        snd_ca0106_intr_disable((struct snd_ca0106 *)(midi->dev_id), intr);
}

static unsigned char ca0106_midi_read(struct snd_ca_midi *midi, int idx)
{
        return (unsigned char)snd_ca0106_ptr_read((struct snd_ca0106 *)(midi->dev_id),
                                                  midi->port + idx, 0);
}

static void ca0106_midi_write(struct snd_ca_midi *midi, int data, int idx)
{
        snd_ca0106_ptr_write((struct snd_ca0106 *)(midi->dev_id), midi->port + idx, 0, data);
}

static struct snd_card *ca0106_dev_id_card(void *dev_id)
{
        return ((struct snd_ca0106 *)dev_id)->card;
}

static int ca0106_dev_id_port(void *dev_id)
{
        return ((struct snd_ca0106 *)dev_id)->port;
}

static int snd_ca0106_midi(struct snd_ca0106 *chip, unsigned int channel)
{
        struct snd_ca_midi *midi;
        char *name;
        int err;

        if (channel == CA0106_MIDI_CHAN_B) {
                name = "CA0106 MPU-401 (UART) B";
                midi =  &chip->midi2;
                midi->tx_enable = INTE_MIDI_TX_B;
                midi->rx_enable = INTE_MIDI_RX_B;
                midi->ipr_tx = IPR_MIDI_TX_B;
                midi->ipr_rx = IPR_MIDI_RX_B;
                midi->port = MIDI_UART_B_DATA;
        } else {
                name = "CA0106 MPU-401 (UART)";
                midi =  &chip->midi;
                midi->tx_enable = INTE_MIDI_TX_A;
                midi->rx_enable = INTE_MIDI_TX_B;
                midi->ipr_tx = IPR_MIDI_TX_A;
                midi->ipr_rx = IPR_MIDI_RX_A;
                midi->port = MIDI_UART_A_DATA;
        }

        midi->reset = CA0106_MPU401_RESET;
        midi->enter_uart = CA0106_MPU401_ENTER_UART;
        midi->ack = CA0106_MPU401_ACK;

        midi->input_avail = CA0106_MIDI_INPUT_AVAIL;
        midi->output_ready = CA0106_MIDI_OUTPUT_READY;

        midi->channel = channel;

        midi->interrupt_enable = ca0106_midi_interrupt_enable;
        midi->interrupt_disable = ca0106_midi_interrupt_disable;

        midi->read = ca0106_midi_read;
        midi->write = ca0106_midi_write;

        midi->get_dev_id_card = ca0106_dev_id_card;
        midi->get_dev_id_port = ca0106_dev_id_port;

        midi->dev_id = chip;
        
        err = ca_midi_init(chip, midi, 0, name);
        if (err < 0)
                return err;

        return 0;
}


static int __snd_ca0106_probe(struct pci_dev *pci,
                              const struct pci_device_id *pci_id)
{
        static int dev;
        struct snd_card *card;
        struct snd_ca0106 *chip;
        int i, err;

        if (dev >= SNDRV_CARDS)
                return -ENODEV;
        if (!enable[dev]) {
                dev++;
                return -ENOENT;
        }

        err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
                                sizeof(*chip), &card);
        if (err < 0)
                return err;
        chip = card->private_data;

        err = snd_ca0106_create(dev, card, pci);
        if (err < 0)
                return err;
        card->private_free = snd_ca0106_free;

        for (i = 0; i < 4; i++) {
                err = snd_ca0106_pcm(chip, i);
                if (err < 0)
                        return err;
        }

        if (chip->details->ac97 == 1) {
                /* The SB0410 and SB0413 do not have an AC97 chip. */
                err = snd_ca0106_ac97(chip);
                if (err < 0)
                        return err;
        }
        err = snd_ca0106_mixer(chip);
        if (err < 0)
                return err;

        dev_dbg(card->dev, "probe for MIDI channel A ...");
        err = snd_ca0106_midi(chip, CA0106_MIDI_CHAN_A);
        if (err < 0)
                return err;
        dev_dbg(card->dev, " done.\n");

#ifdef CONFIG_SND_PROC_FS
        snd_ca0106_proc_init(chip);
#endif

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

        pci_set_drvdata(pci, card);
        dev++;
        return 0;
}

static int snd_ca0106_probe(struct pci_dev *pci,
                            const struct pci_device_id *pci_id)
{
        return snd_card_free_on_error(&pci->dev, __snd_ca0106_probe(pci, pci_id));
}

#ifdef CONFIG_PM_SLEEP
static int snd_ca0106_suspend(struct device *dev)
{
        struct snd_card *card = dev_get_drvdata(dev);
        struct snd_ca0106 *chip = card->private_data;

        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
        if (chip->details->ac97)
                snd_ac97_suspend(chip->ac97);
        snd_ca0106_mixer_suspend(chip);

        ca0106_stop_chip(chip);
        return 0;
}

static int snd_ca0106_resume(struct device *dev)
{
        struct snd_card *card = dev_get_drvdata(dev);
        struct snd_ca0106 *chip = card->private_data;
        int i;

        ca0106_init_chip(chip, 1);

        if (chip->details->ac97)
                snd_ac97_resume(chip->ac97);
        snd_ca0106_mixer_resume(chip);
        if (chip->details->spi_dac) {
                for (i = 0; i < ARRAY_SIZE(chip->spi_dac_reg); i++)
                        snd_ca0106_spi_write(chip, chip->spi_dac_reg[i]);
        }

        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
        return 0;
}

static SIMPLE_DEV_PM_OPS(snd_ca0106_pm, snd_ca0106_suspend, snd_ca0106_resume);
#define SND_CA0106_PM_OPS       &snd_ca0106_pm
#else
#define SND_CA0106_PM_OPS       NULL
#endif

// PCI IDs
static const struct pci_device_id snd_ca0106_ids[] = {
        { PCI_VDEVICE(CREATIVE, 0x0007), 0 },   /* Audigy LS or Live 24bit */
        { 0, }
};
MODULE_DEVICE_TABLE(pci, snd_ca0106_ids);

// pci_driver definition
static struct pci_driver ca0106_driver = {
        .name = KBUILD_MODNAME,
        .id_table = snd_ca0106_ids,
        .probe = snd_ca0106_probe,
        .driver = {
                .pm = SND_CA0106_PM_OPS,
        },
};

module_pci_driver(ca0106_driver);