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opti92x-ad1848.c

/*
    card-opti92x-ad1848.c - driver for OPTi 82c92x based soundcards.
    Copyright (C) 1998-2000 by Massimo Piccioni <dafastidio@libero.it>

    Part of this code was developed at the Italian Ministry of Air Defence,
    Sixth Division (oh, che pace ...), Rome.

    Thanks to Maria Grazia Pollarini, Salvatore Vassallo.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
*/


#include <linux/init.h>
#include <linux/err.h>
#include <linux/isa.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/pnp.h>
#include <linux/moduleparam.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <sound/core.h>
#ifdef CS4231
#include <sound/cs4231.h>
#else
#ifndef OPTi93X
#include <sound/ad1848.h>
#else
#include <sound/control.h>
#include <sound/pcm.h>
#endif      /* OPTi93X */
#endif      /* CS4231 */
#include <sound/mpu401.h>
#include <sound/opl3.h>
#ifndef OPTi93X
#include <sound/opl4.h>
#endif
#define SNDRV_LEGACY_FIND_FREE_IRQ
#define SNDRV_LEGACY_FIND_FREE_DMA
#include <sound/initval.h>

MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
MODULE_LICENSE("GPL");
#ifdef OPTi93X
MODULE_DESCRIPTION("OPTi93X");
MODULE_SUPPORTED_DEVICE("{{OPTi,82C931/3}}");
#else /* OPTi93X */
#ifdef CS4231
MODULE_DESCRIPTION("OPTi92X - CS4231");
MODULE_SUPPORTED_DEVICE("{{OPTi,82C924 (CS4231)},"
            "{OPTi,82C925 (CS4231)}}");
#else /* CS4231 */
MODULE_DESCRIPTION("OPTi92X - AD1848");
MODULE_SUPPORTED_DEVICE("{{OPTi,82C924 (AD1848)},"
            "{OPTi,82C925 (AD1848)},"
              "{OAK,Mozart}}");
#endif      /* CS4231 */
#endif      /* OPTi93X */

static int index = SNDRV_DEFAULT_IDX1;    /* Index 0-MAX */
static char *id = SNDRV_DEFAULT_STR1;           /* ID for this card */
//static int enable = SNDRV_DEFAULT_ENABLE1;    /* Enable this card */
static int isapnp = 1;              /* Enable ISA PnP detection */
static long port = SNDRV_DEFAULT_PORT1;   /* 0x530,0xe80,0xf40,0x604 */
static long mpu_port = SNDRV_DEFAULT_PORT1;     /* 0x300,0x310,0x320,0x330 */
static long fm_port = SNDRV_DEFAULT_PORT1;      /* 0x388 */
static int irq = SNDRV_DEFAULT_IRQ1;            /* 5,7,9,10,11 */
static int mpu_irq = SNDRV_DEFAULT_IRQ1;  /* 5,7,9,10 */
static int dma1 = SNDRV_DEFAULT_DMA1;           /* 0,1,3 */
#if defined(CS4231) || defined(OPTi93X)
static int dma2 = SNDRV_DEFAULT_DMA1;           /* 0,1,3 */
#endif      /* CS4231 || OPTi93X */

module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for opti9xx based soundcard.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for opti9xx based soundcard.");
//module_param(enable, bool, 0444);
//MODULE_PARM_DESC(enable, "Enable opti9xx soundcard.");
module_param(isapnp, bool, 0444);
MODULE_PARM_DESC(isapnp, "Enable ISA PnP detection for specified soundcard.");
module_param(port, long, 0444);
MODULE_PARM_DESC(port, "WSS port # for opti9xx driver.");
module_param(mpu_port, long, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port # for opti9xx driver.");
module_param(fm_port, long, 0444);
MODULE_PARM_DESC(fm_port, "FM port # for opti9xx driver.");
module_param(irq, int, 0444);
MODULE_PARM_DESC(irq, "WSS irq # for opti9xx driver.");
module_param(mpu_irq, int, 0444);
MODULE_PARM_DESC(mpu_irq, "MPU-401 irq # for opti9xx driver.");
module_param(dma1, int, 0444);
MODULE_PARM_DESC(dma1, "1st dma # for opti9xx driver.");
#if defined(CS4231) || defined(OPTi93X)
module_param(dma2, int, 0444);
MODULE_PARM_DESC(dma2, "2nd dma # for opti9xx driver.");
#endif      /* CS4231 || OPTi93X */

#define OPTi9XX_HW_DETECT     0
#define OPTi9XX_HW_82C928     1
#define OPTi9XX_HW_82C929     2
#define OPTi9XX_HW_82C924     3
#define OPTi9XX_HW_82C925     4
#define OPTi9XX_HW_82C930     5
#define OPTi9XX_HW_82C931     6
#define OPTi9XX_HW_82C933     7
#define OPTi9XX_HW_LAST       OPTi9XX_HW_82C933

#define OPTi9XX_MC_REG(n)     n

#ifdef OPTi93X

#define OPTi93X_INDEX               0x00
#define OPTi93X_DATA                0x01
#define OPTi93X_STATUS              0x02
#define OPTi93X_DDATA               0x03
#define OPTi93X_PORT(chip, r)       ((chip)->port + OPTi93X_##r)

#define OPTi93X_MIXOUT_LEFT         0x00
#define OPTi93X_MIXOUT_RIGHT        0x01
#define OPTi93X_CD_LEFT_INPUT       0x02
#define OPTi93X_CD_RIGHT_INPUT            0x03
#define OPTi930_AUX_LEFT_INPUT            0x04
#define OPTi930_AUX_RIGHT_INPUT           0x05
#define OPTi931_FM_LEFT_INPUT       0x04
#define OPTi931_FM_RIGHT_INPUT            0x05
#define OPTi93X_DAC_LEFT            0x06
#define OPTi93X_DAC_RIGHT           0x07
#define OPTi93X_PLAY_FORMAT         0x08
#define OPTi93X_IFACE_CONF          0x09
#define OPTi93X_PIN_CTRL            0x0a
#define OPTi93X_ERR_INIT            0x0b
#define OPTi93X_ID                  0x0c
#define OPTi93X_PLAY_UPR_CNT        0x0e
#define OPTi93X_PLAY_LWR_CNT        0x0f
#define OPTi931_AUX_LEFT_INPUT            0x10
#define OPTi931_AUX_RIGHT_INPUT           0x11
#define OPTi93X_LINE_LEFT_INPUT           0x12
#define OPTi93X_LINE_RIGHT_INPUT    0x13
#define OPTi93X_MIC_LEFT_INPUT            0x14
#define OPTi93X_MIC_RIGHT_INPUT           0x15
#define OPTi93X_OUT_LEFT            0x16
#define OPTi93X_OUT_RIGHT           0x17
#define OPTi93X_CAPT_FORMAT         0x1c
#define OPTi93X_CAPT_UPR_CNT        0x1e
#define OPTi93X_CAPT_LWR_CNT        0x1f

#define OPTi93X_TRD                 0x20
#define OPTi93X_MCE                 0x40
#define OPTi93X_INIT                0x80

#define OPTi93X_MIXOUT_MIC_GAIN           0x20
#define OPTi93X_MIXOUT_LINE         0x00
#define OPTi93X_MIXOUT_CD           0x40
#define OPTi93X_MIXOUT_MIC          0x80
#define OPTi93X_MIXOUT_MIXER        0xc0

#define OPTi93X_STEREO              0x10
#define OPTi93X_LINEAR_8            0x00
#define OPTi93X_ULAW_8              0x20
#define OPTi93X_LINEAR_16_LIT       0x40
#define OPTi93X_ALAW_8              0x60
#define OPTi93X_ADPCM_16            0xa0
#define OPTi93X_LINEAR_16_BIG       0xc0

#define OPTi93X_CAPTURE_PIO         0x80
#define OPTi93X_PLAYBACK_PIO        0x40
#define OPTi93X_AUTOCALIB           0x08
#define OPTi93X_SINGLE_DMA          0x04
#define OPTi93X_CAPTURE_ENABLE            0x02
#define OPTi93X_PLAYBACK_ENABLE           0x01

#define OPTi93X_IRQ_ENABLE          0x02

#define OPTi93X_DMA_REQUEST         0x10
#define OPTi93X_CALIB_IN_PROGRESS   0x20

#define OPTi93X_IRQ_PLAYBACK        0x04
#define OPTi93X_IRQ_CAPTURE         0x08


struct snd_opti93x {
      unsigned long port;
      struct resource *res_port;
      int irq;
      int dma1;
      int dma2;

      struct snd_opti9xx *chip;
      unsigned short hardware;
      unsigned char image[32];

      unsigned char mce_bit;
      unsigned short mode;
      int mute;

      spinlock_t lock;

      struct snd_card *card;
      struct snd_pcm *pcm;
      struct snd_pcm_substream *playback_substream;
      struct snd_pcm_substream *capture_substream;
      unsigned int p_dma_size;
      unsigned int c_dma_size;
};

#define OPTi93X_MODE_NONE     0x00
#define OPTi93X_MODE_PLAY     0x01
#define OPTi93X_MODE_CAPTURE  0x02
#define OPTi93X_MODE_OPEN     (OPTi93X_MODE_PLAY | OPTi93X_MODE_CAPTURE)

#endif /* OPTi93X */

struct snd_opti9xx {
      unsigned short hardware;
      unsigned char password;
      char name[7];

      unsigned long mc_base;
      struct resource *res_mc_base;
      unsigned long mc_base_size;
#ifdef OPTi93X
      unsigned long mc_indir_index;
#endif      /* OPTi93X */
      unsigned long pwd_reg;

      spinlock_t lock;

      long wss_base;
      int irq;
      int dma1;
#if defined(CS4231) || defined(OPTi93X)
      int dma2;
#endif      /* CS4231 || OPTi93X */

      long fm_port;

      long mpu_port;
      int mpu_irq;

#ifdef CONFIG_PNP
      struct pnp_dev *dev;
      struct pnp_dev *devmpu;
#endif      /* CONFIG_PNP */
};

static int snd_opti9xx_pnp_is_probed;

#ifdef CONFIG_PNP

static struct pnp_card_device_id snd_opti9xx_pnpids[] = {
#ifndef OPTi93X
      /* OPTi 82C924 */
      { .id = "OPT0924", .devs = { { "OPT0000" }, { "OPT0002" } }, .driver_data = 0x0924 },
      /* OPTi 82C925 */
      { .id = "OPT0925", .devs = { { "OPT9250" }, { "OPT0002" } }, .driver_data = 0x0925 },
#else
      /* OPTi 82C931/3 */
      { .id = "OPT0931", .devs = { { "OPT9310" }, { "OPT0002" } }, .driver_data = 0x0931 },
#endif      /* OPTi93X */
      { .id = "" }
};

MODULE_DEVICE_TABLE(pnp_card, snd_opti9xx_pnpids);

#endif      /* CONFIG_PNP */

#ifdef OPTi93X
#define DEV_NAME "opti93x"
#else
#define DEV_NAME "opti92x"
#endif

static char * snd_opti9xx_names[] = {
      "unkown",
      "82C928",   "82C929",
      "82C924",   "82C925",
      "82C930",   "82C931",   "82C933"
};


static long __devinit snd_legacy_find_free_ioport(long *port_table, long size)
{
      while (*port_table != -1) {
            if (request_region(*port_table, size, "ALSA test")) {
                  release_region(*port_table, size);
                  return *port_table;
            }
            port_table++;
      }
      return -1;
}

static int __devinit snd_opti9xx_init(struct snd_opti9xx *chip,
                              unsigned short hardware)
{
      static int opti9xx_mc_size[] = {7, 7, 10, 10, 2, 2, 2};

      chip->hardware = hardware;
      strcpy(chip->name, snd_opti9xx_names[hardware]);

      chip->mc_base_size = opti9xx_mc_size[hardware];  

      spin_lock_init(&chip->lock);

      chip->wss_base = -1;
      chip->irq = -1;
      chip->dma1 = -1;
#if defined(CS4231) || defined (OPTi93X)
      chip->dma2 = -1;
#endif      /* CS4231 || OPTi93X */
      chip->fm_port = -1;
      chip->mpu_port = -1;
      chip->mpu_irq = -1;

      switch (hardware) {
#ifndef OPTi93X
      case OPTi9XX_HW_82C928:
      case OPTi9XX_HW_82C929:
            chip->mc_base = 0xf8c;
            chip->password = (hardware == OPTi9XX_HW_82C928) ? 0xe2 : 0xe3;
            chip->pwd_reg = 3;
            break;

      case OPTi9XX_HW_82C924:
      case OPTi9XX_HW_82C925:
            chip->mc_base = 0xf8c;
            chip->password = 0xe5;
            chip->pwd_reg = 3;
            break;
#else /* OPTi93X */

      case OPTi9XX_HW_82C930:
      case OPTi9XX_HW_82C931:
      case OPTi9XX_HW_82C933:
            chip->mc_base = (hardware == OPTi9XX_HW_82C930) ? 0xf8f : 0xf8d;
            chip->mc_indir_index = 0xe0e;
            chip->password = 0xe4;
            chip->pwd_reg = 0;
            break;
#endif      /* OPTi93X */

      default:
            snd_printk("chip %d not supported\n", hardware);
            return -ENODEV;
      }
      return 0;
}

static unsigned char snd_opti9xx_read(struct snd_opti9xx *chip,
                              unsigned char reg)
{
      unsigned long flags;
      unsigned char retval = 0xff;

      spin_lock_irqsave(&chip->lock, flags);
      outb(chip->password, chip->mc_base + chip->pwd_reg);

      switch (chip->hardware) {
#ifndef OPTi93X
      case OPTi9XX_HW_82C924:
      case OPTi9XX_HW_82C925:
            if (reg > 7) {
                  outb(reg, chip->mc_base + 8);
                  outb(chip->password, chip->mc_base + chip->pwd_reg);
                  retval = inb(chip->mc_base + 9);
                  break;
            }

      case OPTi9XX_HW_82C928:
      case OPTi9XX_HW_82C929:
            retval = inb(chip->mc_base + reg);
            break;
#else /* OPTi93X */

      case OPTi9XX_HW_82C930:
      case OPTi9XX_HW_82C931:
      case OPTi9XX_HW_82C933:
            outb(reg, chip->mc_indir_index);
            outb(chip->password, chip->mc_base + chip->pwd_reg);
            retval = inb(chip->mc_indir_index + 1);
            break;
#endif      /* OPTi93X */

      default:
            snd_printk("chip %d not supported\n", chip->hardware);
      }

      spin_unlock_irqrestore(&chip->lock, flags);
      return retval;
}
      
static void snd_opti9xx_write(struct snd_opti9xx *chip, unsigned char reg,
                        unsigned char value)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);
      outb(chip->password, chip->mc_base + chip->pwd_reg);

      switch (chip->hardware) {
#ifndef OPTi93X
      case OPTi9XX_HW_82C924:
      case OPTi9XX_HW_82C925:
            if (reg > 7) {
                  outb(reg, chip->mc_base + 8);
                  outb(chip->password, chip->mc_base + chip->pwd_reg);
                  outb(value, chip->mc_base + 9);
                  break;
            }

      case OPTi9XX_HW_82C928:
      case OPTi9XX_HW_82C929:
            outb(value, chip->mc_base + reg);
            break;
#else /* OPTi93X */

      case OPTi9XX_HW_82C930:
      case OPTi9XX_HW_82C931:
      case OPTi9XX_HW_82C933:
            outb(reg, chip->mc_indir_index);
            outb(chip->password, chip->mc_base + chip->pwd_reg);
            outb(value, chip->mc_indir_index + 1);
            break;
#endif      /* OPTi93X */

      default:
            snd_printk("chip %d not supported\n", chip->hardware);
      }

      spin_unlock_irqrestore(&chip->lock, flags);
}


#define snd_opti9xx_write_mask(chip, reg, value, mask)      \
      snd_opti9xx_write(chip, reg,              \
            (snd_opti9xx_read(chip, reg) & ~(mask)) | ((value) & (mask)))


static int __devinit snd_opti9xx_configure(struct snd_opti9xx *chip)
{
      unsigned char wss_base_bits;
      unsigned char irq_bits;
      unsigned char dma_bits;
      unsigned char mpu_port_bits = 0;
      unsigned char mpu_irq_bits;

      switch (chip->hardware) {
#ifndef OPTi93X
      case OPTi9XX_HW_82C924:
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(4), 0xf0, 0xfc);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(6), 0x02, 0x02);

      case OPTi9XX_HW_82C925:
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(1), 0x80, 0x80);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(2), 0x00, 0x20);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(3), 0xf0, 0xff);
#ifdef CS4231
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x02, 0x02);
#else
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x00, 0x02);
#endif      /* CS4231 */
            break;

      case OPTi9XX_HW_82C928:
      case OPTi9XX_HW_82C929:
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(1), 0x80, 0x80);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(2), 0x00, 0x20);
            /*
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(3), 0xa2, 0xae);
            */
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(4), 0x00, 0x0c);
#ifdef CS4231
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x02, 0x02);
#else
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x00, 0x02);
#endif      /* CS4231 */
            break;

#else /* OPTi93X */
      case OPTi9XX_HW_82C930:
      case OPTi9XX_HW_82C931:
      case OPTi9XX_HW_82C933:
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(6), 0x02, 0x03);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(3), 0x00, 0xff);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(4), 0x10 |
                  (chip->hardware == OPTi9XX_HW_82C930 ? 0x00 : 0x04),
                  0x34);
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(5), 0x20, 0xbf);
            /* 
             * The BTC 1817DW has QS1000 wavetable which is connected
             * to the serial digital input of the OPTI931.
             */
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(21), 0x82, 0xff);
            /* 
             * This bit sets OPTI931 to automaticaly select FM
             * or digital input signal.
             */
            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(26), 0x01, 0x01);
            break;
#endif      /* OPTi93X */

      default:
            snd_printk("chip %d not supported\n", chip->hardware);
            return -EINVAL;
      }

      switch (chip->wss_base) {
      case 0x530:
            wss_base_bits = 0x00;
            break;
      case 0x604:
            wss_base_bits = 0x03;
            break;
      case 0xe80:
            wss_base_bits = 0x01;
            break;
      case 0xf40:
            wss_base_bits = 0x02;
            break;
      default:
            snd_printk("WSS port 0x%lx not valid\n", chip->wss_base);
            goto __skip_base;
      }
      snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(1), wss_base_bits << 4, 0x30);

__skip_base:
      switch (chip->irq) {
//#ifdef OPTi93X
      case 5:
            irq_bits = 0x05;
            break;
//#endif    /* OPTi93X */
      case 7:
            irq_bits = 0x01;
            break;
      case 9:
            irq_bits = 0x02;
            break;
      case 10:
            irq_bits = 0x03;
            break;
      case 11:
            irq_bits = 0x04;
            break;
      default:
            snd_printk("WSS irq # %d not valid\n", chip->irq);
            goto __skip_resources;
      }

      switch (chip->dma1) {
      case 0:
            dma_bits = 0x01;
            break;
      case 1:
            dma_bits = 0x02;
            break;
      case 3:
            dma_bits = 0x03;
            break;
      default:
            snd_printk("WSS dma1 # %d not valid\n", chip->dma1);
            goto __skip_resources;
      }

#if defined(CS4231) || defined(OPTi93X)
      if (chip->dma1 == chip->dma2) {
            snd_printk("don't want to share dmas\n");
            return -EBUSY;
      }

      switch (chip->dma2) {
      case 0:
      case 1:
            break;
      default:
            snd_printk("WSS dma2 # %d not valid\n", chip->dma2);
            goto __skip_resources;
      }
      dma_bits |= 0x04;
#endif      /* CS4231 || OPTi93X */

#ifndef OPTi93X
       outb(irq_bits << 3 | dma_bits, chip->wss_base);
#else /* OPTi93X */
      snd_opti9xx_write(chip, OPTi9XX_MC_REG(3), (irq_bits << 3 | dma_bits));
#endif /* OPTi93X */

__skip_resources:
      if (chip->hardware > OPTi9XX_HW_82C928) {
            switch (chip->mpu_port) {
            case 0:
            case -1:
                  break;
            case 0x300:
                  mpu_port_bits = 0x03;
                  break;
            case 0x310:
                  mpu_port_bits = 0x02;
                  break;
            case 0x320:
                  mpu_port_bits = 0x01;
                  break;
            case 0x330:
                  mpu_port_bits = 0x00;
                  break;
            default:
                  snd_printk("MPU-401 port 0x%lx not valid\n",
                        chip->mpu_port);
                  goto __skip_mpu;
            }

            switch (chip->mpu_irq) {
            case 5:
                  mpu_irq_bits = 0x02;
                  break;
            case 7:
                  mpu_irq_bits = 0x03;
                  break;
            case 9:
                  mpu_irq_bits = 0x00;
                  break;
            case 10:
                  mpu_irq_bits = 0x01;
                  break;
            default:
                  snd_printk("MPU-401 irq # %d not valid\n",
                        chip->mpu_irq);
                  goto __skip_mpu;
            }

            snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(6),
                  (chip->mpu_port <= 0) ? 0x00 :
                        0x80 | mpu_port_bits << 5 | mpu_irq_bits << 3,
                  0xf8);
      }
__skip_mpu:

      return 0;
}

#ifdef OPTi93X

static unsigned char snd_opti93x_default_image[32] =
{
      0x00,       /* 00/00 - l_mixout_outctrl */
      0x00,       /* 01/01 - r_mixout_outctrl */
      0x88,       /* 02/02 - l_cd_inctrl */
      0x88,       /* 03/03 - r_cd_inctrl */
      0x88,       /* 04/04 - l_a1/fm_inctrl */
      0x88,       /* 05/05 - r_a1/fm_inctrl */
      0x80,       /* 06/06 - l_dac_inctrl */
      0x80,       /* 07/07 - r_dac_inctrl */
      0x00,       /* 08/08 - ply_dataform_reg */
      0x00,       /* 09/09 - if_conf */
      0x00,       /* 0a/10 - pin_ctrl */
      0x00,       /* 0b/11 - err_init_reg */
      0x0a,       /* 0c/12 - id_reg */
      0x00,       /* 0d/13 - reserved */
      0x00,       /* 0e/14 - ply_upcount_reg */
      0x00,       /* 0f/15 - ply_lowcount_reg */
      0x88,       /* 10/16 - reserved/l_a1_inctrl */
      0x88,       /* 11/17 - reserved/r_a1_inctrl */
      0x88,       /* 12/18 - l_line_inctrl */
      0x88,       /* 13/19 - r_line_inctrl */
      0x88,       /* 14/20 - l_mic_inctrl */
      0x88,       /* 15/21 - r_mic_inctrl */
      0x80,       /* 16/22 - l_out_outctrl */
      0x80,       /* 17/23 - r_out_outctrl */
      0x00,       /* 18/24 - reserved */
      0x00,       /* 19/25 - reserved */
      0x00,       /* 1a/26 - reserved */
      0x00,       /* 1b/27 - reserved */
      0x00,       /* 1c/28 - cap_dataform_reg */
      0x00,       /* 1d/29 - reserved */
      0x00,       /* 1e/30 - cap_upcount_reg */
      0x00        /* 1f/31 - cap_lowcount_reg */
};


static int snd_opti93x_busy_wait(struct snd_opti93x *chip)
{
      int timeout;

      for (timeout = 250; timeout-- > 0; udelay(10))
            if (!(inb(OPTi93X_PORT(chip, INDEX)) & OPTi93X_INIT))
                  return 0;

      snd_printk("chip still busy.\n");
      return -EBUSY;
}

static unsigned char snd_opti93x_in(struct snd_opti93x *chip, unsigned char reg)
{
      snd_opti93x_busy_wait(chip);
      outb(chip->mce_bit | (reg & 0x1f), OPTi93X_PORT(chip, INDEX));
      return inb(OPTi93X_PORT(chip, DATA));
}

static void snd_opti93x_out(struct snd_opti93x *chip, unsigned char reg,
                      unsigned char value)
{
      snd_opti93x_busy_wait(chip);
      outb(chip->mce_bit | (reg & 0x1f), OPTi93X_PORT(chip, INDEX));
      outb(value, OPTi93X_PORT(chip, DATA));
}

static void snd_opti93x_out_image(struct snd_opti93x *chip, unsigned char reg,
                          unsigned char value)
{
      snd_opti93x_out(chip, reg, chip->image[reg] = value);
}

static void snd_opti93x_out_mask(struct snd_opti93x *chip, unsigned char reg,
                         unsigned char mask, unsigned char value)
{
      snd_opti93x_out_image(chip, reg,
            (chip->image[reg] & ~mask) | (value & mask));
}


static void snd_opti93x_mce_up(struct snd_opti93x *chip)
{
      snd_opti93x_busy_wait(chip);

      chip->mce_bit = OPTi93X_MCE;
      if (!(inb(OPTi93X_PORT(chip, INDEX)) & OPTi93X_MCE))
            outb(chip->mce_bit, OPTi93X_PORT(chip, INDEX));
}

static void snd_opti93x_mce_down(struct snd_opti93x *chip)
{
      snd_opti93x_busy_wait(chip);

      chip->mce_bit = 0;
      if (inb(OPTi93X_PORT(chip, INDEX)) & OPTi93X_MCE)
            outb(chip->mce_bit, OPTi93X_PORT(chip, INDEX));
}

#define snd_opti93x_mute_reg(chip, reg, mute)   \
      snd_opti93x_out(chip, reg, mute ? 0x80 : chip->image[reg]);

static void snd_opti93x_mute(struct snd_opti93x *chip, int mute)
{
      mute = mute ? 1 : 0;
      if (chip->mute == mute)
            return;

      chip->mute = mute;

      snd_opti93x_mute_reg(chip, OPTi93X_CD_LEFT_INPUT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_CD_RIGHT_INPUT, mute);
      switch (chip->hardware) {
      case OPTi9XX_HW_82C930:
            snd_opti93x_mute_reg(chip, OPTi930_AUX_LEFT_INPUT, mute);
            snd_opti93x_mute_reg(chip, OPTi930_AUX_RIGHT_INPUT, mute);
            break;
      case OPTi9XX_HW_82C931:
      case OPTi9XX_HW_82C933:
            snd_opti93x_mute_reg(chip, OPTi931_FM_LEFT_INPUT, mute);
            snd_opti93x_mute_reg(chip, OPTi931_FM_RIGHT_INPUT, mute);
            snd_opti93x_mute_reg(chip, OPTi931_AUX_LEFT_INPUT, mute);
            snd_opti93x_mute_reg(chip, OPTi931_AUX_RIGHT_INPUT, mute);
      }
      snd_opti93x_mute_reg(chip, OPTi93X_DAC_LEFT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_DAC_RIGHT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_LINE_LEFT_INPUT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_LINE_RIGHT_INPUT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_MIC_LEFT_INPUT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_MIC_RIGHT_INPUT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_OUT_LEFT, mute);
      snd_opti93x_mute_reg(chip, OPTi93X_OUT_RIGHT, mute);
}


static unsigned int snd_opti93x_get_count(unsigned char format,
                                unsigned int size)
{
      switch (format & 0xe0) {
      case OPTi93X_LINEAR_16_LIT:
      case OPTi93X_LINEAR_16_BIG:
            size >>= 1;
            break;
      case OPTi93X_ADPCM_16:
            return size >> 2;
      }
      return (format & OPTi93X_STEREO) ? (size >> 1) : size;
}

static unsigned int rates[] = {  5512,  6615,  8000,  9600, 11025, 16000, 
                        18900, 22050, 27428, 32000, 33075, 37800,
                        44100, 48000 };
#define RATES ARRAY_SIZE(rates)

static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
      .count = RATES,
      .list = rates,
      .mask = 0,
};

static unsigned char bits[] = {  0x01,  0x0f,  0x00,  0x0e,  0x03,  0x02,
                         0x05,  0x07,  0x04,  0x06,  0x0d,  0x09,
                         0x0b,  0x0c};

static unsigned char snd_opti93x_get_freq(unsigned int rate)
{
      unsigned int i;

      for (i = 0; i < RATES; i++) {
            if (rate == rates[i])
                  return bits[i];
      }
      snd_BUG();
      return bits[RATES-1];
}

static unsigned char snd_opti93x_get_format(struct snd_opti93x *chip,
                                  unsigned int format, int channels)
{
      unsigned char retval = OPTi93X_LINEAR_8;

      switch (format) {
      case SNDRV_PCM_FORMAT_MU_LAW:
            retval = OPTi93X_ULAW_8;
            break;
      case SNDRV_PCM_FORMAT_A_LAW:
            retval = OPTi93X_ALAW_8;
            break;
      case SNDRV_PCM_FORMAT_S16_LE:
            retval = OPTi93X_LINEAR_16_LIT;
            break;
      case SNDRV_PCM_FORMAT_S16_BE:
            retval = OPTi93X_LINEAR_16_BIG;
            break;
      case SNDRV_PCM_FORMAT_IMA_ADPCM:
            retval = OPTi93X_ADPCM_16;
      }
      return (channels > 1) ? (retval | OPTi93X_STEREO) : retval;
}


static void snd_opti93x_playback_format(struct snd_opti93x *chip, unsigned char fmt)
{
      unsigned char mask;

      snd_opti93x_mute(chip, 1);

      snd_opti93x_mce_up(chip);
      mask = (chip->mode & OPTi93X_MODE_CAPTURE) ? 0xf0 : 0xff;
      snd_opti93x_out_mask(chip, OPTi93X_PLAY_FORMAT, mask, fmt);
      snd_opti93x_mce_down(chip);

      snd_opti93x_mute(chip, 0);
}

static void snd_opti93x_capture_format(struct snd_opti93x *chip, unsigned char fmt)
{
      snd_opti93x_mute(chip, 1);

      snd_opti93x_mce_up(chip);
      if (!(chip->mode & OPTi93X_MODE_PLAY))
            snd_opti93x_out_mask(chip, OPTi93X_PLAY_FORMAT, 0x0f, fmt);
      else
            fmt = chip->image[OPTi93X_PLAY_FORMAT] & 0xf0;
      snd_opti93x_out_image(chip, OPTi93X_CAPT_FORMAT, fmt);
      snd_opti93x_mce_down(chip);

      snd_opti93x_mute(chip, 0);
}


static int snd_opti93x_open(struct snd_opti93x *chip, unsigned int mode)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      if (chip->mode & mode) {
            spin_unlock_irqrestore(&chip->lock, flags);
            return -EAGAIN;
      }

      if (!(chip->mode & OPTi93X_MODE_OPEN)) {
            outb(0x00, OPTi93X_PORT(chip, STATUS));
            snd_opti93x_out_mask(chip, OPTi93X_PIN_CTRL,
                  OPTi93X_IRQ_ENABLE, OPTi93X_IRQ_ENABLE);
            chip->mode = mode;
      }
      else
            chip->mode |= mode;

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static void snd_opti93x_close(struct snd_opti93x *chip, unsigned int mode)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      chip->mode &= ~mode;
      if (chip->mode & OPTi93X_MODE_OPEN) {
            spin_unlock_irqrestore(&chip->lock, flags);
            return;
      }

      snd_opti93x_mute(chip, 1);

      outb(0, OPTi93X_PORT(chip, STATUS));
      snd_opti93x_out_mask(chip, OPTi93X_PIN_CTRL, OPTi93X_IRQ_ENABLE,
            ~OPTi93X_IRQ_ENABLE);

      snd_opti93x_mce_up(chip);
      snd_opti93x_out_image(chip, OPTi93X_IFACE_CONF, 0x00);
      snd_opti93x_mce_down(chip);
      chip->mode = 0;

      snd_opti93x_mute(chip, 0);
      spin_unlock_irqrestore(&chip->lock, flags);
}

static int snd_opti93x_trigger(struct snd_pcm_substream *substream, 
                         unsigned char what, int cmd)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);

      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
      case SNDRV_PCM_TRIGGER_STOP:
      {
            unsigned int what = 0;
            struct snd_pcm_substream *s;
            snd_pcm_group_for_each_entry(s, substream) {
                  if (s == chip->playback_substream) {
                        what |= OPTi93X_PLAYBACK_ENABLE;
                        snd_pcm_trigger_done(s, substream);
                  } else if (s == chip->capture_substream) {
                        what |= OPTi93X_CAPTURE_ENABLE;
                        snd_pcm_trigger_done(s, substream);
                  }
            }
            spin_lock(&chip->lock);
            if (cmd == SNDRV_PCM_TRIGGER_START) {
                  snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF, what, what);
                  if (what & OPTi93X_CAPTURE_ENABLE)
                        udelay(50);
            } else
                  snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF, what, 0x00);
            spin_unlock(&chip->lock);
            break;
      }
      default:
            return -EINVAL;
      }
      return 0;
}

static int snd_opti93x_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
      return snd_opti93x_trigger(substream,
                           OPTi93X_PLAYBACK_ENABLE, cmd);
}

static int snd_opti93x_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
      return snd_opti93x_trigger(substream,
                           OPTi93X_CAPTURE_ENABLE, cmd);
}

static int snd_opti93x_hw_params(struct snd_pcm_substream *substream,
                         struct snd_pcm_hw_params *hw_params)
{
      return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}


static int snd_opti93x_hw_free(struct snd_pcm_substream *substream)
{
      snd_pcm_lib_free_pages(substream);
      return 0;
}


static int snd_opti93x_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned long flags;
      unsigned char format;
      unsigned int count = snd_pcm_lib_period_bytes(substream);
      unsigned int size = snd_pcm_lib_buffer_bytes(substream);

      spin_lock_irqsave(&chip->lock, flags);

      chip->p_dma_size = size;
      snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF,
            OPTi93X_PLAYBACK_ENABLE | OPTi93X_PLAYBACK_PIO,
            ~(OPTi93X_PLAYBACK_ENABLE | OPTi93X_PLAYBACK_PIO));

      snd_dma_program(chip->dma1, runtime->dma_addr, size,
            DMA_MODE_WRITE | DMA_AUTOINIT);

      format = snd_opti93x_get_freq(runtime->rate);
      format |= snd_opti93x_get_format(chip, runtime->format,
            runtime->channels);
      snd_opti93x_playback_format(chip, format);
      format = chip->image[OPTi93X_PLAY_FORMAT];

      count = snd_opti93x_get_count(format, count) - 1;
      snd_opti93x_out_image(chip, OPTi93X_PLAY_LWR_CNT, count);
      snd_opti93x_out_image(chip, OPTi93X_PLAY_UPR_CNT, count >> 8);

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static int snd_opti93x_capture_prepare(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned long flags;
      unsigned char format;
      unsigned int count = snd_pcm_lib_period_bytes(substream);
      unsigned int size = snd_pcm_lib_buffer_bytes(substream);

      spin_lock_irqsave(&chip->lock, flags);

      chip->c_dma_size = size;
      snd_opti93x_out_mask(chip, OPTi93X_IFACE_CONF,
            OPTi93X_CAPTURE_ENABLE | OPTi93X_CAPTURE_PIO, 0);

      snd_dma_program(chip->dma2, runtime->dma_addr, size,
            DMA_MODE_READ | DMA_AUTOINIT);

      format = snd_opti93x_get_freq(runtime->rate);
      format |= snd_opti93x_get_format(chip, runtime->format,
            runtime->channels);
      snd_opti93x_capture_format(chip, format);
      format = chip->image[OPTi93X_CAPT_FORMAT];

      count = snd_opti93x_get_count(format, count) - 1;
      snd_opti93x_out_image(chip, OPTi93X_CAPT_LWR_CNT, count);
      snd_opti93x_out_image(chip, OPTi93X_CAPT_UPR_CNT, count >> 8);

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static snd_pcm_uframes_t snd_opti93x_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      size_t ptr;

      if (!(chip->image[OPTi93X_IFACE_CONF] & OPTi93X_PLAYBACK_ENABLE))
            return 0;

      ptr = snd_dma_pointer(chip->dma1, chip->p_dma_size);
      return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_opti93x_capture_pointer(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      size_t ptr;
      
      if (!(chip->image[OPTi93X_IFACE_CONF] & OPTi93X_CAPTURE_ENABLE))
            return 0;

      ptr = snd_dma_pointer(chip->dma2, chip->c_dma_size);
      return bytes_to_frames(substream->runtime, ptr);
}


static void snd_opti93x_overrange(struct snd_opti93x *chip)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      if (snd_opti93x_in(chip, OPTi93X_ERR_INIT) & (0x08 | 0x02))
            chip->capture_substream->runtime->overrange++;

      spin_unlock_irqrestore(&chip->lock, flags);
}

static irqreturn_t snd_opti93x_interrupt(int irq, void *dev_id)
{
      struct snd_opti93x *codec = dev_id;
      unsigned char status;

      status = snd_opti9xx_read(codec->chip, OPTi9XX_MC_REG(11));
      if ((status & OPTi93X_IRQ_PLAYBACK) && codec->playback_substream)
            snd_pcm_period_elapsed(codec->playback_substream);
      if ((status & OPTi93X_IRQ_CAPTURE) && codec->capture_substream) {
            snd_opti93x_overrange(codec);
            snd_pcm_period_elapsed(codec->capture_substream);
      }
      outb(0x00, OPTi93X_PORT(codec, STATUS));
      return IRQ_HANDLED;
}


static struct snd_pcm_hardware snd_opti93x_playback = {
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
      .formats =        (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
      .rates =          SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000_48000,
      .rate_min =       5512,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static struct snd_pcm_hardware snd_opti93x_capture = {
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START),
      .formats =        (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW | SNDRV_PCM_FMTBIT_IMA_ADPCM |
                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE),
      .rates =          SNDRV_PCM_RATE_8000_48000,
      .rate_min =       5512,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static int snd_opti93x_playback_open(struct snd_pcm_substream *substream)
{
      int error;
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;

      if ((error = snd_opti93x_open(chip, OPTi93X_MODE_PLAY)) < 0)
            return error;
      snd_pcm_set_sync(substream);
      chip->playback_substream = substream;
      runtime->hw = snd_opti93x_playback;
      snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
      return error;
}

static int snd_opti93x_capture_open(struct snd_pcm_substream *substream)
{
      int error;
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;

      if ((error = snd_opti93x_open(chip, OPTi93X_MODE_CAPTURE)) < 0)
            return error;
      runtime->hw = snd_opti93x_capture;
      snd_pcm_set_sync(substream);
      chip->capture_substream = substream;
      snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates);
      return error;
}

static int snd_opti93x_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);

      chip->playback_substream = NULL;
      snd_opti93x_close(chip, OPTi93X_MODE_PLAY);
      return 0;
}

static int snd_opti93x_capture_close(struct snd_pcm_substream *substream)
{
      struct snd_opti93x *chip = snd_pcm_substream_chip(substream);

      chip->capture_substream = NULL;
      snd_opti93x_close(chip, OPTi93X_MODE_CAPTURE);
      return 0;
}


static void snd_opti93x_init(struct snd_opti93x *chip)
{
      unsigned long flags;
      int i;

      spin_lock_irqsave(&chip->lock, flags);
      snd_opti93x_mce_up(chip);

      for (i = 0; i < 32; i++)
            snd_opti93x_out_image(chip, i, snd_opti93x_default_image[i]);

      snd_opti93x_mce_down(chip);
      spin_unlock_irqrestore(&chip->lock, flags);
}

static int snd_opti93x_probe(struct snd_opti93x *chip)
{
      unsigned long flags;
      unsigned char val;

      spin_lock_irqsave(&chip->lock, flags);
      val = snd_opti93x_in(chip, OPTi93X_ID) & 0x0f;
      spin_unlock_irqrestore(&chip->lock, flags);

      return (val == 0x0a) ? 0 : -ENODEV;
}

static int snd_opti93x_free(struct snd_opti93x *chip)
{
      release_and_free_resource(chip->res_port);
      if (chip->dma1 >= 0) {
            disable_dma(chip->dma1);
            free_dma(chip->dma1);
      }
      if (chip->dma2 >= 0) {
            disable_dma(chip->dma2);
            free_dma(chip->dma2);
      }
      if (chip->irq >= 0) {
        free_irq(chip->irq, chip);
      }
      kfree(chip);
      return 0;
}

static int snd_opti93x_dev_free(struct snd_device *device)
{
      struct snd_opti93x *chip = device->device_data;
      return snd_opti93x_free(chip);
}

static const char *snd_opti93x_chip_id(struct snd_opti93x *codec)
{
      switch (codec->hardware) {
      case OPTi9XX_HW_82C930: return "82C930";
      case OPTi9XX_HW_82C931: return "82C931";
      case OPTi9XX_HW_82C933: return "82C933";
      default:          return "???";
      }
}

static int snd_opti93x_create(struct snd_card *card, struct snd_opti9xx *chip,
                        int dma1, int dma2,
                        struct snd_opti93x **rcodec)
{
      static struct snd_device_ops ops = {
            .dev_free = snd_opti93x_dev_free,
      };
      int error;
      struct snd_opti93x *codec;

      *rcodec = NULL;
      codec = kzalloc(sizeof(*codec), GFP_KERNEL);
      if (codec == NULL)
            return -ENOMEM;
      codec->irq = -1;
      codec->dma1 = -1;
      codec->dma2 = -1;

      if ((codec->res_port = request_region(chip->wss_base + 4, 4, "OPTI93x CODEC")) == NULL) {
            snd_printk(KERN_ERR "opti9xx: can't grab port 0x%lx\n", chip->wss_base + 4);
            snd_opti93x_free(codec);
            return -EBUSY;
      }
      if (request_dma(dma1, "OPTI93x - 1")) {
            snd_printk(KERN_ERR "opti9xx: can't grab DMA1 %d\n", dma1);
            snd_opti93x_free(codec);
            return -EBUSY;
      }
      codec->dma1 = chip->dma1;
      if (request_dma(dma2, "OPTI93x - 2")) {
            snd_printk(KERN_ERR "opti9xx: can't grab DMA2 %d\n", dma2);
            snd_opti93x_free(codec);
            return -EBUSY;
      }
      codec->dma2 = chip->dma2;

      if (request_irq(chip->irq, snd_opti93x_interrupt, IRQF_DISABLED, DEV_NAME" - WSS", codec)) {
            snd_printk(KERN_ERR "opti9xx: can't grab IRQ %d\n", chip->irq);
            snd_opti93x_free(codec);
            return -EBUSY;
      }

      codec->card = card;
      codec->port = chip->wss_base + 4;
      codec->irq = chip->irq;

      spin_lock_init(&codec->lock);
      codec->hardware = chip->hardware;
      codec->chip = chip;

      if ((error = snd_opti93x_probe(codec))) {
            snd_opti93x_free(codec);
            return error;
      }

      snd_opti93x_init(codec);

      /* Register device */
      if ((error = snd_device_new(card, SNDRV_DEV_LOWLEVEL, codec, &ops)) < 0) {
            snd_opti93x_free(codec);
            return error;
      }

      *rcodec = codec;
      return 0;
}

static struct snd_pcm_ops snd_opti93x_playback_ops = {
      .open =           snd_opti93x_playback_open,
      .close =    snd_opti93x_playback_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_opti93x_hw_params,
      .hw_free =  snd_opti93x_hw_free,
      .prepare =  snd_opti93x_playback_prepare,
      .trigger =  snd_opti93x_playback_trigger,
      .pointer =  snd_opti93x_playback_pointer,
};

static struct snd_pcm_ops snd_opti93x_capture_ops = {
      .open =           snd_opti93x_capture_open,
      .close =    snd_opti93x_capture_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_opti93x_hw_params,
      .hw_free =  snd_opti93x_hw_free,
      .prepare =  snd_opti93x_capture_prepare,
      .trigger =  snd_opti93x_capture_trigger,
      .pointer =  snd_opti93x_capture_pointer,
};

static int snd_opti93x_pcm(struct snd_opti93x *codec, int device, struct snd_pcm **rpcm)
{
      int error;
      struct snd_pcm *pcm;

      if ((error = snd_pcm_new(codec->card, "OPTi 82C93X", device, 1, 1, &pcm)) < 0)
            return error;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_opti93x_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_opti93x_capture_ops);

      pcm->private_data = codec;
      pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;

      strcpy(pcm->name, snd_opti93x_chip_id(codec));

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

      codec->pcm = pcm;
      if (rpcm)
            *rpcm = pcm;
      return 0;
}

/*
 *  MIXER part
 */

static int snd_opti93x_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
      static char *texts[4] = {
            "Line1", "Aux", "Mic", "Mix"
      };

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 2;
      uinfo->value.enumerated.items = 4;
      if (uinfo->value.enumerated.item > 3)
            uinfo->value.enumerated.item = 3;
      strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
      return 0;
}

static int snd_opti93x_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      
      spin_lock_irqsave(&chip->lock, flags);
      ucontrol->value.enumerated.item[0] = (chip->image[OPTi93X_MIXOUT_LEFT] & OPTi93X_MIXOUT_MIXER) >> 6;
      ucontrol->value.enumerated.item[1] = (chip->image[OPTi93X_MIXOUT_RIGHT] & OPTi93X_MIXOUT_MIXER) >> 6;
      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static int snd_opti93x_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      unsigned short left, right;
      int change;
      
      if (ucontrol->value.enumerated.item[0] > 3 ||
          ucontrol->value.enumerated.item[1] > 3)
            return -EINVAL;
      left = ucontrol->value.enumerated.item[0] << 6;
      right = ucontrol->value.enumerated.item[1] << 6;
      spin_lock_irqsave(&chip->lock, flags);
      left = (chip->image[OPTi93X_MIXOUT_LEFT] & ~OPTi93X_MIXOUT_MIXER) | left;
      right = (chip->image[OPTi93X_MIXOUT_RIGHT] & ~OPTi93X_MIXOUT_MIXER) | right;
      change = left != chip->image[OPTi93X_MIXOUT_LEFT] ||
               right != chip->image[OPTi93X_MIXOUT_RIGHT];
      snd_opti93x_out_image(chip, OPTi93X_MIXOUT_LEFT, left);
      snd_opti93x_out_image(chip, OPTi93X_MIXOUT_RIGHT, right);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

#if 0

#define OPTi93X_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_opti93x_info_single, \
  .get = snd_opti93x_get_single, .put = snd_opti93x_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_opti93x_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_opti93x_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift = (kcontrol->private_value >> 8) & 0xff;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;
      
      spin_lock_irqsave(&chip->lock, flags);
      ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
      spin_unlock_irqrestore(&chip->lock, flags);
      if (invert)
            ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
      return 0;
}

static int snd_opti93x_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift = (kcontrol->private_value >> 8) & 0xff;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;
      int change;
      unsigned short val;
      
      val = (ucontrol->value.integer.value[0] & mask);
      if (invert)
            val = mask - val;
      val <<= shift;
      spin_lock_irqsave(&chip->lock, flags);
      val = (chip->image[reg] & ~(mask << shift)) | val;
      change = val != chip->image[reg];
      snd_opti93x_out(chip, reg, val);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

#endif /* single */

#define OPTi93X_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_opti93x_info_double, \
  .get = snd_opti93x_get_double, .put = snd_opti93x_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }

#define OPTi93X_DOUBLE_INVERT_INVERT(xctl) \
      do { xctl.private_value ^= 22; } while (0)
#define OPTi93X_DOUBLE_CHANGE_REGS(xctl, left_reg, right_reg) \
      do { xctl.private_value &= ~0x0000ffff; \
           xctl.private_value |= left_reg | (right_reg << 8); } while (0)

static int snd_opti93x_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_opti93x_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int left_reg = kcontrol->private_value & 0xff;
      int right_reg = (kcontrol->private_value >> 8) & 0xff;
      int shift_left = (kcontrol->private_value >> 16) & 0x07;
      int shift_right = (kcontrol->private_value >> 19) & 0x07;
      int mask = (kcontrol->private_value >> 24) & 0xff;
      int invert = (kcontrol->private_value >> 22) & 1;
      
      spin_lock_irqsave(&chip->lock, flags);
      ucontrol->value.integer.value[0] = (chip->image[left_reg] >> shift_left) & mask;
      ucontrol->value.integer.value[1] = (chip->image[right_reg] >> shift_right) & mask;
      spin_unlock_irqrestore(&chip->lock, flags);
      if (invert) {
            ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
            ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
      }
      return 0;
}

static int snd_opti93x_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_opti93x *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int left_reg = kcontrol->private_value & 0xff;
      int right_reg = (kcontrol->private_value >> 8) & 0xff;
      int shift_left = (kcontrol->private_value >> 16) & 0x07;
      int shift_right = (kcontrol->private_value >> 19) & 0x07;
      int mask = (kcontrol->private_value >> 24) & 0xff;
      int invert = (kcontrol->private_value >> 22) & 1;
      int change;
      unsigned short val1, val2;
      
      val1 = ucontrol->value.integer.value[0] & mask;
      val2 = ucontrol->value.integer.value[1] & mask;
      if (invert) {
            val1 = mask - val1;
            val2 = mask - val2;
      }
      val1 <<= shift_left;
      val2 <<= shift_right;
      spin_lock_irqsave(&chip->lock, flags);
      val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
      val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
      change = val1 != chip->image[left_reg] || val2 != chip->image[right_reg];
      snd_opti93x_out_image(chip, left_reg, val1);
      snd_opti93x_out_image(chip, right_reg, val2);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

static struct snd_kcontrol_new snd_opti93x_controls[] __devinitdata = {
OPTi93X_DOUBLE("Master Playback Switch", 0, OPTi93X_OUT_LEFT, OPTi93X_OUT_RIGHT, 7, 7, 1, 1),
OPTi93X_DOUBLE("Master Playback Volume", 0, OPTi93X_OUT_LEFT, OPTi93X_OUT_RIGHT, 1, 1, 31, 1), 
OPTi93X_DOUBLE("PCM Playback Switch", 0, OPTi93X_DAC_LEFT, OPTi93X_DAC_RIGHT, 7, 7, 1, 1),
OPTi93X_DOUBLE("PCM Playback Volume", 0, OPTi93X_DAC_LEFT, OPTi93X_DAC_RIGHT, 0, 0, 31, 1),
OPTi93X_DOUBLE("FM Playback Switch", 0, OPTi931_FM_LEFT_INPUT, OPTi931_FM_RIGHT_INPUT, 7, 7, 1, 1),
OPTi93X_DOUBLE("FM Playback Volume", 0, OPTi931_FM_LEFT_INPUT, OPTi931_FM_RIGHT_INPUT, 1, 1, 15, 1),
OPTi93X_DOUBLE("Line Playback Switch", 0, OPTi93X_LINE_LEFT_INPUT, OPTi93X_LINE_RIGHT_INPUT, 7, 7, 1, 1),
OPTi93X_DOUBLE("Line Playback Volume", 0, OPTi93X_LINE_LEFT_INPUT, OPTi93X_LINE_RIGHT_INPUT, 1, 1, 15, 1), 
OPTi93X_DOUBLE("Mic Playback Switch", 0, OPTi93X_MIC_LEFT_INPUT, OPTi93X_MIC_RIGHT_INPUT, 7, 7, 1, 1),
OPTi93X_DOUBLE("Mic Playback Volume", 0, OPTi93X_MIC_LEFT_INPUT, OPTi93X_MIC_RIGHT_INPUT, 1, 1, 15, 1), 
OPTi93X_DOUBLE("Mic Boost", 0, OPTi93X_MIXOUT_LEFT, OPTi93X_MIXOUT_RIGHT, 5, 5, 1, 1),
OPTi93X_DOUBLE("CD Playback Switch", 0, OPTi93X_CD_LEFT_INPUT, OPTi93X_CD_RIGHT_INPUT, 7, 7, 1, 1),
OPTi93X_DOUBLE("CD Playback Volume", 0, OPTi93X_CD_LEFT_INPUT, OPTi93X_CD_RIGHT_INPUT, 1, 1, 15, 1),
OPTi93X_DOUBLE("Aux Playback Switch", 0, OPTi931_AUX_LEFT_INPUT, OPTi931_AUX_RIGHT_INPUT, 7, 7, 1, 1),
OPTi93X_DOUBLE("Aux Playback Volume", 0, OPTi931_AUX_LEFT_INPUT, OPTi931_AUX_RIGHT_INPUT, 1, 1, 15, 1), 
OPTi93X_DOUBLE("Capture Volume", 0, OPTi93X_MIXOUT_LEFT, OPTi93X_MIXOUT_RIGHT, 0, 0, 15, 0),
{
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "Capture Source",
      .info = snd_opti93x_info_mux,
      .get = snd_opti93x_get_mux,
      .put = snd_opti93x_put_mux,
}
};
                                        
static int __devinit snd_opti93x_mixer(struct snd_opti93x *chip)
{
      struct snd_card *card;
      struct snd_kcontrol_new knew;
      int err;
      unsigned int idx;

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

      card = chip->card;

      strcpy(card->mixername, snd_opti93x_chip_id(chip));

      for (idx = 0; idx < ARRAY_SIZE(snd_opti93x_controls); idx++) {
            knew = snd_opti93x_controls[idx];
            if (chip->hardware == OPTi9XX_HW_82C930) {
                  if (strstr(knew.name, "FM"))  /* skip FM controls */
                        continue;
                  else if (strcmp(knew.name, "Mic Playback Volume"))
                        OPTi93X_DOUBLE_INVERT_INVERT(knew);
                  else if (strstr(knew.name, "Aux"))
                        OPTi93X_DOUBLE_CHANGE_REGS(knew, OPTi930_AUX_LEFT_INPUT, OPTi930_AUX_RIGHT_INPUT);
                  else if (strcmp(knew.name, "PCM Playback Volume"))
                        OPTi93X_DOUBLE_INVERT_INVERT(knew);
                  else if (strcmp(knew.name, "Master Playback Volume"))
                        OPTi93X_DOUBLE_INVERT_INVERT(knew);
            }
            if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_opti93x_controls[idx], chip))) < 0)
                  return err;
      }
      return 0;
}

#endif /* OPTi93X */

static int __devinit snd_card_opti9xx_detect(struct snd_card *card,
                                   struct snd_opti9xx *chip)
{
      int i, err;

#ifndef OPTi93X
      for (i = OPTi9XX_HW_82C928; i < OPTi9XX_HW_82C930; i++) {
            unsigned char value;

            if ((err = snd_opti9xx_init(chip, i)) < 0)
                  return err;

            if ((chip->res_mc_base = request_region(chip->mc_base, chip->mc_base_size, "OPTi9xx MC")) == NULL)
                  continue;

            value = snd_opti9xx_read(chip, OPTi9XX_MC_REG(1));
            if ((value != 0xff) && (value != inb(chip->mc_base + 1)))
                  if (value == snd_opti9xx_read(chip, OPTi9XX_MC_REG(1)))
                        return 1;

            release_and_free_resource(chip->res_mc_base);
            chip->res_mc_base = NULL;

      }
#else /* OPTi93X */
      for (i = OPTi9XX_HW_82C931; i >= OPTi9XX_HW_82C930; i--) {
            unsigned long flags;
            unsigned char value;

            if ((err = snd_opti9xx_init(chip, i)) < 0)
                  return err;

            if ((chip->res_mc_base = request_region(chip->mc_base, chip->mc_base_size, "OPTi9xx MC")) == NULL)
                  continue;

            spin_lock_irqsave(&chip->lock, flags);
            outb(chip->password, chip->mc_base + chip->pwd_reg);
            outb(((chip->mc_indir_index & (1 << 8)) >> 4) |
                  ((chip->mc_indir_index & 0xf0) >> 4), chip->mc_base);
            spin_unlock_irqrestore(&chip->lock, flags);

            value = snd_opti9xx_read(chip, OPTi9XX_MC_REG(7));
            snd_opti9xx_write(chip, OPTi9XX_MC_REG(7), 0xff - value);
            if (snd_opti9xx_read(chip, OPTi9XX_MC_REG(7)) == 0xff - value)
                  return 1;

            release_and_free_resource(chip->res_mc_base);
            chip->res_mc_base = NULL;
      }
#endif      /* OPTi93X */

      return -ENODEV;
}

#ifdef CONFIG_PNP
static int __devinit snd_card_opti9xx_pnp(struct snd_opti9xx *chip,
                                struct pnp_card_link *card,
                                const struct pnp_card_device_id *pid)
{
      struct pnp_dev *pdev;
      int err;

      chip->dev = pnp_request_card_device(card, pid->devs[0].id, NULL);
      if (chip->dev == NULL)
            return -EBUSY;

      chip->devmpu = pnp_request_card_device(card, pid->devs[1].id, NULL);

      pdev = chip->dev;

      err = pnp_activate_dev(pdev);
      if (err < 0) {
            snd_printk(KERN_ERR "AUDIO pnp configure failure: %d\n", err);
            return err;
      }

#ifdef OPTi93X
      port = pnp_port_start(pdev, 0) - 4;
      fm_port = pnp_port_start(pdev, 1) + 8;
#else
      if (pid->driver_data != 0x0924)
            port = pnp_port_start(pdev, 1);
      fm_port = pnp_port_start(pdev, 2) + 8;
#endif      /* OPTi93X */
      irq = pnp_irq(pdev, 0);
      dma1 = pnp_dma(pdev, 0);
#if defined(CS4231) || defined(OPTi93X)
      dma2 = pnp_dma(pdev, 1);
#endif      /* CS4231 || OPTi93X */

      pdev = chip->devmpu;
      if (pdev && mpu_port > 0) {
            err = pnp_activate_dev(pdev);
            if (err < 0) {
                  snd_printk(KERN_ERR "AUDIO pnp configure failure\n");
                  mpu_port = -1;
                  chip->devmpu = NULL;
            } else {
                  mpu_port = pnp_port_start(pdev, 0);
                  mpu_irq = pnp_irq(pdev, 0);
            }
      }
      return pid->driver_data;
}
#endif      /* CONFIG_PNP */

static void snd_card_opti9xx_free(struct snd_card *card)
{
      struct snd_opti9xx *chip = card->private_data;
        
      if (chip)
            release_and_free_resource(chip->res_mc_base);
}

static int __devinit snd_opti9xx_probe(struct snd_card *card)
{
      static long possible_ports[] = {0x530, 0xe80, 0xf40, 0x604, -1};
      int error;
      struct snd_opti9xx *chip = card->private_data;
#if defined(OPTi93X)
      struct snd_opti93x *codec;
#elif defined(CS4231)
      struct snd_cs4231 *codec;
      struct snd_timer *timer;
#else
      struct snd_ad1848 *codec;
#endif
      struct snd_pcm *pcm;
      struct snd_rawmidi *rmidi;
      struct snd_hwdep *synth;

      if (! chip->res_mc_base &&
          (chip->res_mc_base = request_region(chip->mc_base, chip->mc_base_size,
                                    "OPTi9xx MC")) == NULL)
            return -ENOMEM;

      chip->wss_base = port;
      chip->fm_port = fm_port;
      chip->mpu_port = mpu_port;
      chip->irq = irq;
      chip->mpu_irq = mpu_irq;
      chip->dma1 = dma1;
#if defined(CS4231) || defined(OPTi93X)
      chip->dma2 = dma2;
#endif

      if (chip->wss_base == SNDRV_AUTO_PORT) {
            if ((chip->wss_base = snd_legacy_find_free_ioport(possible_ports, 4)) < 0) {
                  snd_printk("unable to find a free WSS port\n");
                  return -EBUSY;
            }
      }
      if ((error = snd_opti9xx_configure(chip)))
            return error;

#if defined(OPTi93X)
      if ((error = snd_opti93x_create(card, chip, chip->dma1, chip->dma2, &codec)))
            return error;
      if ((error = snd_opti93x_pcm(codec, 0, &pcm)) < 0)
            return error;
      if ((error = snd_opti93x_mixer(codec)) < 0)
            return error;
#elif defined(CS4231)
      if ((error = snd_cs4231_create(card, chip->wss_base + 4, -1,
                               chip->irq, chip->dma1, chip->dma2,
                               CS4231_HW_DETECT,
                               0,
                               &codec)) < 0)
            return error;
      if ((error = snd_cs4231_pcm(codec, 0, &pcm)) < 0)
            return error;
      if ((error = snd_cs4231_mixer(codec)) < 0)
            return error;
      if ((error = snd_cs4231_timer(codec, 0, &timer)) < 0)
            return error;
#else
      if ((error = snd_ad1848_create(card, chip->wss_base + 4,
                               chip->irq, chip->dma1,
                               AD1848_HW_DETECT, &codec)) < 0)
            return error;
      if ((error = snd_ad1848_pcm(codec, 0, &pcm)) < 0)
            return error;
      if ((error = snd_ad1848_mixer(codec)) < 0)
            return error;
#endif
      strcpy(card->driver, chip->name);
      sprintf(card->shortname, "OPTi %s", card->driver);
#if defined(CS4231) || defined(OPTi93X)
      sprintf(card->longname, "%s, %s at 0x%lx, irq %d, dma %d&%d",
            card->shortname, pcm->name, chip->wss_base + 4,
            chip->irq, chip->dma1, chip->dma2);
#else
      sprintf(card->longname, "%s, %s at 0x%lx, irq %d, dma %d",
            card->shortname, pcm->name, chip->wss_base + 4,
            chip->irq, chip->dma1);
#endif      /* CS4231 || OPTi93X */

      if (chip->mpu_port <= 0 || chip->mpu_port == SNDRV_AUTO_PORT)
            rmidi = NULL;
      else
            if ((error = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
                        chip->mpu_port, 0, chip->mpu_irq, IRQF_DISABLED,
                        &rmidi)))
                  snd_printk(KERN_WARNING "no MPU-401 device at 0x%lx?\n",
                           chip->mpu_port);

      if (chip->fm_port > 0 && chip->fm_port != SNDRV_AUTO_PORT) {
            struct snd_opl3 *opl3 = NULL;
#ifndef OPTi93X
            if (chip->hardware == OPTi9XX_HW_82C928 ||
                chip->hardware == OPTi9XX_HW_82C929 ||
                chip->hardware == OPTi9XX_HW_82C924) {
                  struct snd_opl4 *opl4;
                  /* assume we have an OPL4 */
                  snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(2),
                                     0x20, 0x20);
                  if (snd_opl4_create(card,
                                  chip->fm_port,
                                  chip->fm_port - 8,
                                  2, &opl3, &opl4) < 0) {
                        /* no luck, use OPL3 instead */
                        snd_opti9xx_write_mask(chip, OPTi9XX_MC_REG(2),
                                           0x00, 0x20);
                  }
            }
#endif      /* !OPTi93X */
            if (!opl3 && snd_opl3_create(card,
                                   chip->fm_port,
                                   chip->fm_port + 2,
                                   OPL3_HW_AUTO, 0, &opl3) < 0) {
                  snd_printk(KERN_WARNING "no OPL device at 0x%lx-0x%lx\n",
                           chip->fm_port, chip->fm_port + 4 - 1);
            }
            if (opl3) {
#ifdef CS4231
                  const int t1dev = 1;
#else
                  const int t1dev = 0;
#endif
                  if ((error = snd_opl3_timer_new(opl3, t1dev, t1dev+1)) < 0)
                        return error;
                  if ((error = snd_opl3_hwdep_new(opl3, 0, 1, &synth)) < 0)
                        return error;
            }
      }

      return snd_card_register(card);
}

static struct snd_card *snd_opti9xx_card_new(void)
{
      struct snd_card *card;

      card = snd_card_new(index, id, THIS_MODULE, sizeof(struct snd_opti9xx));
      if (! card)
            return NULL;
      card->private_free = snd_card_opti9xx_free;
      return card;
}

static int __devinit snd_opti9xx_isa_match(struct device *devptr,
                                 unsigned int dev)
{
#ifdef CONFIG_PNP
      if (snd_opti9xx_pnp_is_probed)
            return 0;
      if (isapnp)
            return 0;
#endif
      return 1;
}

static int __devinit snd_opti9xx_isa_probe(struct device *devptr,
                                 unsigned int dev)
{
      struct snd_card *card;
      int error;
      static long possible_mpu_ports[] = {0x300, 0x310, 0x320, 0x330, -1};
#ifdef OPTi93X
      static int possible_irqs[] = {5, 9, 10, 11, 7, -1};
#else
      static int possible_irqs[] = {9, 10, 11, 7, -1};
#endif      /* OPTi93X */
      static int possible_mpu_irqs[] = {5, 9, 10, 7, -1};
      static int possible_dma1s[] = {3, 1, 0, -1};
#if defined(CS4231) || defined(OPTi93X)
      static int possible_dma2s[][2] = {{1,-1}, {0,-1}, {-1,-1}, {0,-1}};
#endif      /* CS4231 || OPTi93X */

      if (mpu_port == SNDRV_AUTO_PORT) {
            if ((mpu_port = snd_legacy_find_free_ioport(possible_mpu_ports, 2)) < 0) {
                  snd_printk(KERN_ERR "unable to find a free MPU401 port\n");
                  return -EBUSY;
            }
      }
      if (irq == SNDRV_AUTO_IRQ) {
            if ((irq = snd_legacy_find_free_irq(possible_irqs)) < 0) {
                  snd_printk(KERN_ERR "unable to find a free IRQ\n");
                  return -EBUSY;
            }
      }
      if (mpu_irq == SNDRV_AUTO_IRQ) {
            if ((mpu_irq = snd_legacy_find_free_irq(possible_mpu_irqs)) < 0) {
                  snd_printk(KERN_ERR "unable to find a free MPU401 IRQ\n");
                  return -EBUSY;
            }
      }
      if (dma1 == SNDRV_AUTO_DMA) {
            if ((dma1 = snd_legacy_find_free_dma(possible_dma1s)) < 0) {
                  snd_printk(KERN_ERR "unable to find a free DMA1\n");
                  return -EBUSY;
            }
      }
#if defined(CS4231) || defined(OPTi93X)
      if (dma2 == SNDRV_AUTO_DMA) {
            if ((dma2 = snd_legacy_find_free_dma(possible_dma2s[dma1 % 4])) < 0) {
                  snd_printk("unable to find a free DMA2\n");
                  return -EBUSY;
            }
      }
#endif

      card = snd_opti9xx_card_new();
      if (! card)
            return -ENOMEM;

      if ((error = snd_card_opti9xx_detect(card, card->private_data)) < 0) {
            snd_card_free(card);
            return error;
      }
      snd_card_set_dev(card, devptr);
      if ((error = snd_opti9xx_probe(card)) < 0) {
            snd_card_free(card);
            return error;
      }
      dev_set_drvdata(devptr, card);
      return 0;
}

static int __devexit snd_opti9xx_isa_remove(struct device *devptr,
                                  unsigned int dev)
{
      snd_card_free(dev_get_drvdata(devptr));
      dev_set_drvdata(devptr, NULL);
      return 0;
}

static struct isa_driver snd_opti9xx_driver = {
      .match            = snd_opti9xx_isa_match,
      .probe            = snd_opti9xx_isa_probe,
      .remove           = __devexit_p(snd_opti9xx_isa_remove),
      /* FIXME: suspend/resume */
      .driver           = {
            .name = DEV_NAME
      },
};

#ifdef CONFIG_PNP
static int __devinit snd_opti9xx_pnp_probe(struct pnp_card_link *pcard,
                                 const struct pnp_card_device_id *pid)
{
      struct snd_card *card;
      int error, hw;
      struct snd_opti9xx *chip;

      if (snd_opti9xx_pnp_is_probed)
            return -EBUSY;
      if (! isapnp)
            return -ENODEV;
      card = snd_opti9xx_card_new();
      if (! card)
            return -ENOMEM;
      chip = card->private_data;

      hw = snd_card_opti9xx_pnp(chip, pcard, pid);
      switch (hw) {
      case 0x0924:
            hw = OPTi9XX_HW_82C924;
            break;
      case 0x0925:
            hw = OPTi9XX_HW_82C925;
            break;
      case 0x0931:
            hw = OPTi9XX_HW_82C931;
            break;
      default:
            snd_card_free(card);
            return -ENODEV;
      }

      if ((error = snd_opti9xx_init(chip, hw))) {
            snd_card_free(card);
            return error;
      }
      if (hw <= OPTi9XX_HW_82C930)
            chip->mc_base -= 0x80;
      snd_card_set_dev(card, &pcard->card->dev);
      if ((error = snd_opti9xx_probe(card)) < 0) {
            snd_card_free(card);
            return error;
      }
      pnp_set_card_drvdata(pcard, card);
      snd_opti9xx_pnp_is_probed = 1;
      return 0;
}

static void __devexit snd_opti9xx_pnp_remove(struct pnp_card_link * pcard)
{
      snd_card_free(pnp_get_card_drvdata(pcard));
      pnp_set_card_drvdata(pcard, NULL);
      snd_opti9xx_pnp_is_probed = 0;
}

static struct pnp_card_driver opti9xx_pnpc_driver = {
      .flags            = PNP_DRIVER_RES_DISABLE,
      .name       = "opti9xx",
      .id_table   = snd_opti9xx_pnpids,
      .probe            = snd_opti9xx_pnp_probe,
      .remove           = __devexit_p(snd_opti9xx_pnp_remove),
};
#endif

#ifdef OPTi93X
#define CHIP_NAME "82C93x"
#else
#define CHIP_NAME "82C92x"
#endif

static int __init alsa_card_opti9xx_init(void)
{
#ifdef CONFIG_PNP
      pnp_register_card_driver(&opti9xx_pnpc_driver);
      if (snd_opti9xx_pnp_is_probed)
            return 0;
      pnp_unregister_card_driver(&opti9xx_pnpc_driver);
#endif
      return isa_register_driver(&snd_opti9xx_driver, 1);
}

static void __exit alsa_card_opti9xx_exit(void)
{
      if (!snd_opti9xx_pnp_is_probed) {
            isa_unregister_driver(&snd_opti9xx_driver);
            return;
      }
#ifdef CONFIG_PNP
      pnp_unregister_card_driver(&opti9xx_pnpc_driver);
#endif
}

module_init(alsa_card_opti9xx_init)
module_exit(alsa_card_opti9xx_exit)

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