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ali5451.c

/*
 *  Matt Wu <Matt_Wu@acersoftech.com.cn>
 *  Apr 26, 2001
 *  Routines for control of ALi pci audio M5451
 *
 *  BUGS:
 *    --
 *
 *  TODO:
 *    --
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public Lcodecnse as published by
 *   the Free Software Foundation; either version 2 of the Lcodecnse, 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 Lcodecnse for more details.
 *
 *   You should have received a copy of the GNU General Public Lcodecnse
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/ac97_codec.h>
#include <sound/mpu401.h>
#include <sound/initval.h>

MODULE_AUTHOR("Matt Wu <Matt_Wu@acersoftech.com.cn>");
MODULE_DESCRIPTION("ALI M5451");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ALI,M5451,pci},{ALI,M5451}}");

static int index = SNDRV_DEFAULT_IDX1;    /* Index */
static char *id = SNDRV_DEFAULT_STR1;     /* ID for this card */
static int pcm_channels = 32;
static int spdif;

module_param(index, int, 0444);
MODULE_PARM_DESC(index, "Index value for ALI M5451 PCI Audio.");
module_param(id, charp, 0444);
MODULE_PARM_DESC(id, "ID string for ALI M5451 PCI Audio.");
module_param(pcm_channels, int, 0444);
MODULE_PARM_DESC(pcm_channels, "PCM Channels");
module_param(spdif, bool, 0444);
MODULE_PARM_DESC(spdif, "Support SPDIF I/O");

/* just for backward compatibility */
static int enable;
module_param(enable, bool, 0444);


/*
 *  Debug part definitions
 */

/* #define ALI_DEBUG */

#ifdef ALI_DEBUG
#define snd_ali_printk(format, args...) printk(KERN_DEBUG format, ##args);
#else
#define snd_ali_printk(format, args...)
#endif

/*
 *  Constants definition
 */

#define DEVICE_ID_ALI5451     ((PCI_VENDOR_ID_AL<<16)|PCI_DEVICE_ID_AL_M5451)


#define ALI_CHANNELS          32

#define ALI_PCM_IN_CHANNEL    31
#define ALI_SPDIF_IN_CHANNEL  19
#define ALI_SPDIF_OUT_CHANNEL 15
#define ALI_CENTER_CHANNEL    24
#define ALI_LEF_CHANNEL       23
#define ALI_SURR_LEFT_CHANNEL 26
#define ALI_SURR_RIGHT_CHANNEL      25
#define ALI_MODEM_IN_CHANNEL    21
#define ALI_MODEM_OUT_CHANNEL   20

#define     SNDRV_ALI_VOICE_TYPE_PCM      01
#define SNDRV_ALI_VOICE_TYPE_OTH    02

#define     ALI_5451_V02            0x02

/*
 *  Direct Registers
 */

#define ALI_LEGACY_DMAR0        0x00  /* ADR0 */
#define ALI_LEGACY_DMAR4        0x04  /* CNT0 */
#define ALI_LEGACY_DMAR11       0x0b  /* MOD  */
#define ALI_LEGACY_DMAR15       0x0f  /* MMR  */
#define ALI_MPUR0       0x20
#define ALI_MPUR1       0x21
#define ALI_MPUR2       0x22
#define ALI_MPUR3       0x23

#define     ALI_AC97_WRITE          0x40
#define ALI_AC97_READ         0x44

#define ALI_SCTRL       0x48
#define   ALI_SPDIF_OUT_ENABLE            0x20
#define   ALI_SCTRL_LINE_IN2        (1 << 9)
#define   ALI_SCTRL_GPIO_IN2        (1 << 13)
#define   ALI_SCTRL_LINE_OUT_EN     (1 << 20)
#define   ALI_SCTRL_GPIO_OUT_EN     (1 << 23)
#define   ALI_SCTRL_CODEC1_READY    (1 << 24)
#define   ALI_SCTRL_CODEC2_READY    (1 << 25)
#define ALI_AC97_GPIO         0x4c
#define   ALI_AC97_GPIO_ENABLE            0x8000
#define   ALI_AC97_GPIO_DATA_SHIFT  16
#define ALI_SPDIF_CS          0x70
#define ALI_SPDIF_CTRL        0x74
#define   ALI_SPDIF_IN_FUNC_ENABLE  0x02
#define   ALI_SPDIF_IN_CH_STATUS    0x40
#define   ALI_SPDIF_OUT_CH_STATUS   0xbf
#define ALI_START       0x80
#define ALI_STOP        0x84
#define ALI_CSPF        0x90
#define ALI_AINT        0x98
#define ALI_GC_CIR            0xa0
      #define ENDLP_IE        0x00001000
      #define MIDLP_IE        0x00002000
#define ALI_AINTEN            0xa4
#define ALI_VOLUME            0xa8
#define ALI_SBDELTA_DELTA_R     0xac
#define ALI_MISCINT           0xb0
      #define ADDRESS_IRQ           0x00000020
      #define TARGET_REACHED        0x00008000
      #define MIXER_OVERFLOW        0x00000800
      #define MIXER_UNDERFLOW       0x00000400
      #define GPIO_IRQ        0x01000000
#define ALI_SBBL_SBCL           0xc0
#define ALI_SBCTRL_SBE2R_SBDD   0xc4
#define ALI_STIMER            0xc8
#define ALI_GLOBAL_CONTROL    0xd4
#define   ALI_SPDIF_OUT_SEL_PCM           0x00000400 /* bit 10 */
#define   ALI_SPDIF_IN_SUPPORT            0x00000800 /* bit 11 */
#define   ALI_SPDIF_OUT_CH_ENABLE   0x00008000 /* bit 15 */
#define   ALI_SPDIF_IN_CH_ENABLE    0x00080000 /* bit 19 */
#define   ALI_PCM_IN_ENABLE         0x80000000 /* bit 31 */

#define ALI_CSO_ALPHA_FMS     0xe0
#define ALI_LBA               0xe4
#define ALI_ESO_DELTA         0xe8
#define ALI_GVSEL_PAN_VOC_CTRL_EC   0xf0
#define ALI_EBUF1       0xf4
#define ALI_EBUF2       0xf8

#define ALI_REG(codec, x) ((codec)->port + x)

#define MAX_CODECS 2


struct snd_ali;
struct snd_ali_voice;

struct snd_ali_channel_control {
      /* register data */
      struct REGDATA {
            unsigned int start;
            unsigned int stop;
            unsigned int aint;
            unsigned int ainten;
      } data;
            
      /* register addresses */
      struct REGS {
            unsigned int start;
            unsigned int stop;
            unsigned int aint;
            unsigned int ainten;
            unsigned int ac97read;
            unsigned int ac97write;
      } regs;

};

struct snd_ali_voice {
      unsigned int number;
      unsigned int use :1,
            pcm :1,
            midi :1,
            mode :1,
            synth :1,
            running :1;

      /* PCM data */
      struct snd_ali *codec;
      struct snd_pcm_substream *substream;
      struct snd_ali_voice *extra;
      
      int eso;                /* final ESO value for channel */
      int count;              /* runtime->period_size */

      /* --- */

      void *private_data;
      void (*private_free)(void *private_data);
};


struct snd_alidev {

      struct snd_ali_voice voices[ALI_CHANNELS];      

      unsigned int      chcnt;                  /* num of opened channels */
      unsigned int      chmap;                  /* bitmap for opened channels */
      unsigned int synthcount;

};


#define ALI_GLOBAL_REGS       56
#define ALI_CHANNEL_REGS      8
struct snd_ali_image {
      u32 regs[ALI_GLOBAL_REGS];
      u32 channel_regs[ALI_CHANNELS][ALI_CHANNEL_REGS];
};


struct snd_ali {
      int         irq;
      unsigned long     port;
      unsigned char     revision;

      unsigned int hw_initialized :1;
      unsigned int spdif_support :1;

      struct pci_dev    *pci;
      struct pci_dev    *pci_m1533;
      struct pci_dev    *pci_m7101;

      struct snd_card   *card;
      struct snd_pcm    *pcm[MAX_CODECS];
      struct snd_alidev synth;
      struct snd_ali_channel_control chregs;

      /* S/PDIF Mask */
      unsigned int      spdif_mask;

      unsigned int spurious_irq_count;
      unsigned int spurious_irq_max_delta;

      unsigned int num_of_codecs;

      struct snd_ac97_bus *ac97_bus;
      struct snd_ac97 *ac97[MAX_CODECS];
      unsigned short    ac97_ext_id;
      unsigned short    ac97_ext_status;

      spinlock_t  reg_lock;
      spinlock_t  voice_alloc;

#ifdef CONFIG_PM
      struct snd_ali_image *image;
#endif
};

static struct pci_device_id snd_ali_ids[] = {
      {PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5451), 0, 0, 0},
      {0, }
};
MODULE_DEVICE_TABLE(pci, snd_ali_ids);

static void snd_ali_clear_voices(struct snd_ali *, unsigned int, unsigned int);
static unsigned short snd_ali_codec_peek(struct snd_ali *, int, unsigned short);
static void snd_ali_codec_poke(struct snd_ali *, int, unsigned short,
                         unsigned short);

/*
 *  AC97 ACCESS
 */

static inline unsigned int snd_ali_5451_peek(struct snd_ali *codec,
                                   unsigned int port)
{
      return (unsigned int)inl(ALI_REG(codec, port)); 
}

static inline void snd_ali_5451_poke(struct snd_ali *codec,
                             unsigned int port,
                             unsigned int val)
{
      outl((unsigned int)val, ALI_REG(codec, port));
}

static int snd_ali_codec_ready(struct snd_ali *codec,
                         unsigned int port)
{
      unsigned long end_time;
      unsigned int res;
      
      end_time = jiffies + msecs_to_jiffies(250);
      do {
            res = snd_ali_5451_peek(codec,port);
            if (!(res & 0x8000))
                  return 0;
            schedule_timeout_uninterruptible(1);
      } while (time_after_eq(end_time, jiffies));
      snd_ali_5451_poke(codec, port, res & ~0x8000);
      snd_printdd("ali_codec_ready: codec is not ready.\n ");
      return -EIO;
}

static int snd_ali_stimer_ready(struct snd_ali *codec)
{
      unsigned long end_time;
      unsigned long dwChk1,dwChk2;
      
      dwChk1 = snd_ali_5451_peek(codec, ALI_STIMER);
      dwChk2 = snd_ali_5451_peek(codec, ALI_STIMER);

      end_time = jiffies + msecs_to_jiffies(250);
      do {
            dwChk2 = snd_ali_5451_peek(codec, ALI_STIMER);
            if (dwChk2 != dwChk1)
                  return 0;
            schedule_timeout_uninterruptible(1);
      } while (time_after_eq(end_time, jiffies));
      snd_printk(KERN_ERR "ali_stimer_read: stimer is not ready.\n");
      return -EIO;
}

static void snd_ali_codec_poke(struct snd_ali *codec,int secondary,
                         unsigned short reg,
                         unsigned short val)
{
      unsigned int dwVal;
      unsigned int port;

      if (reg >= 0x80) {
            snd_printk(KERN_ERR "ali_codec_poke: reg(%xh) invalid.\n", reg);
            return;
      }

      port = codec->chregs.regs.ac97write;

      if (snd_ali_codec_ready(codec, port) < 0)
            return;
      if (snd_ali_stimer_ready(codec) < 0)
            return;

      dwVal  = (unsigned int) (reg & 0xff);
      dwVal |= 0x8000 | (val << 16);
      if (secondary)
            dwVal |= 0x0080;
      if (codec->revision == ALI_5451_V02)
            dwVal |= 0x0100;

      snd_ali_5451_poke(codec, port, dwVal);

      return ;
}

static unsigned short snd_ali_codec_peek(struct snd_ali *codec,
                               int secondary,
                               unsigned short reg)
{
      unsigned int dwVal;
      unsigned int port;

      if (reg >= 0x80) {
            snd_printk(KERN_ERR "ali_codec_peek: reg(%xh) invalid.\n", reg);
            return ~0;
      }

      port = codec->chregs.regs.ac97read;

      if (snd_ali_codec_ready(codec, port) < 0)
            return ~0;
      if (snd_ali_stimer_ready(codec) < 0)
            return ~0;

      dwVal  = (unsigned int) (reg & 0xff);
      dwVal |= 0x8000;                    /* bit 15*/
      if (secondary)
            dwVal |= 0x0080;

      snd_ali_5451_poke(codec, port, dwVal);

      if (snd_ali_stimer_ready(codec) < 0)
            return ~0;
      if (snd_ali_codec_ready(codec, port) < 0)
            return ~0;
      
      return (snd_ali_5451_peek(codec, port) & 0xffff0000) >> 16;
}

static void snd_ali_codec_write(struct snd_ac97 *ac97,
                        unsigned short reg,
                        unsigned short val )
{
      struct snd_ali *codec = ac97->private_data;

      snd_ali_printk("codec_write: reg=%xh data=%xh.\n", reg, val);
      if (reg == AC97_GPIO_STATUS) {
            outl((val << ALI_AC97_GPIO_DATA_SHIFT) | ALI_AC97_GPIO_ENABLE,
                 ALI_REG(codec, ALI_AC97_GPIO));
            return;
      }
      snd_ali_codec_poke(codec, ac97->num, reg, val);
      return ;
}


static unsigned short snd_ali_codec_read(struct snd_ac97 *ac97,
                               unsigned short reg)
{
      struct snd_ali *codec = ac97->private_data;

      snd_ali_printk("codec_read reg=%xh.\n", reg);
      return snd_ali_codec_peek(codec, ac97->num, reg);
}

/*
 *    AC97 Reset
 */

static int snd_ali_reset_5451(struct snd_ali *codec)
{
      struct pci_dev *pci_dev;
      unsigned short wCount, wReg;
      unsigned int   dwVal;
      
      pci_dev = codec->pci_m1533;
      if (pci_dev) {
            pci_read_config_dword(pci_dev, 0x7c, &dwVal);
            pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
            udelay(5000);
            pci_read_config_dword(pci_dev, 0x7c, &dwVal);
            pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
            udelay(5000);
      }
      
      pci_dev = codec->pci;
      pci_read_config_dword(pci_dev, 0x44, &dwVal);
      pci_write_config_dword(pci_dev, 0x44, dwVal | 0x000c0000);
      udelay(500);
      pci_read_config_dword(pci_dev, 0x44, &dwVal);
      pci_write_config_dword(pci_dev, 0x44, dwVal & 0xfffbffff);
      udelay(5000);
      
      wCount = 200;
      while(wCount--) {
            wReg = snd_ali_codec_peek(codec, 0, AC97_POWERDOWN);
            if ((wReg & 0x000f) == 0x000f)
                  return 0;
            udelay(5000);
      }

      /* non-fatal if you have a non PM capable codec */
      /* snd_printk(KERN_WARNING "ali5451: reset time out\n"); */
      return 0;
}

#ifdef CODEC_RESET

static int snd_ali_reset_codec(struct snd_ali *codec)
{
      struct pci_dev *pci_dev;
      unsigned char bVal;
      unsigned int   dwVal;
      unsigned short wCount, wReg;

      pci_dev = codec->pci_m1533;
      
      pci_read_config_dword(pci_dev, 0x7c, &dwVal);
      pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
      udelay(5000);
      pci_read_config_dword(pci_dev, 0x7c, &dwVal);
      pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
      udelay(5000);

      bVal = inb(ALI_REG(codec,ALI_SCTRL));
      bVal |= 0x02;
      outb(ALI_REG(codec,ALI_SCTRL),bVal);
      udelay(5000);
      bVal = inb(ALI_REG(codec,ALI_SCTRL));
      bVal &= 0xfd;
      outb(ALI_REG(codec,ALI_SCTRL),bVal);
      udelay(15000);

      wCount = 200;
      while (wCount--) {
            wReg = snd_ali_codec_read(codec->ac97, AC97_POWERDOWN);
            if ((wReg & 0x000f) == 0x000f)
                  return 0;
            udelay(5000);
      }
      return -1;
}

#endif

/*
 *  ALI 5451 Controller
 */

static void snd_ali_enable_special_channel(struct snd_ali *codec,
                                 unsigned int channel)
{
      unsigned long dwVal;

      dwVal  = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      dwVal |= 1 << (channel & 0x0000001f);
      outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
}

static void snd_ali_disable_special_channel(struct snd_ali *codec,
                                  unsigned int channel)
{
      unsigned long dwVal;

      dwVal  = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      dwVal &= ~(1 << (channel & 0x0000001f));
      outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
}

static void snd_ali_enable_address_interrupt(struct snd_ali *codec)
{
      unsigned int gc;

      gc  = inl(ALI_REG(codec, ALI_GC_CIR));
      gc |= ENDLP_IE;
      gc |= MIDLP_IE;
      outl( gc, ALI_REG(codec, ALI_GC_CIR));
}

static void snd_ali_disable_address_interrupt(struct snd_ali *codec)
{
      unsigned int gc;

      gc  = inl(ALI_REG(codec, ALI_GC_CIR));
      gc &= ~ENDLP_IE;
      gc &= ~MIDLP_IE;
      outl(gc, ALI_REG(codec, ALI_GC_CIR));
}

#if 0 /* not used */
static void snd_ali_enable_voice_irq(struct snd_ali *codec,
                             unsigned int channel)
{
      unsigned int mask;
      struct snd_ali_channel_control *pchregs = &(codec->chregs);

      snd_ali_printk("enable_voice_irq channel=%d\n",channel);
      
      mask = 1 << (channel & 0x1f);
      pchregs->data.ainten  = inl(ALI_REG(codec, pchregs->regs.ainten));
      pchregs->data.ainten |= mask;
      outl(pchregs->data.ainten, ALI_REG(codec, pchregs->regs.ainten));
}
#endif

static void snd_ali_disable_voice_irq(struct snd_ali *codec,
                              unsigned int channel)
{
      unsigned int mask;
      struct snd_ali_channel_control *pchregs = &(codec->chregs);

      snd_ali_printk("disable_voice_irq channel=%d\n",channel);

      mask = 1 << (channel & 0x1f);
      pchregs->data.ainten  = inl(ALI_REG(codec, pchregs->regs.ainten));
      pchregs->data.ainten &= ~mask;
      outl(pchregs->data.ainten, ALI_REG(codec, pchregs->regs.ainten));
}

static int snd_ali_alloc_pcm_channel(struct snd_ali *codec, int channel)
{
      unsigned int idx =  channel & 0x1f;

      if (codec->synth.chcnt >= ALI_CHANNELS){
            snd_printk(KERN_ERR
                     "ali_alloc_pcm_channel: no free channels.\n");
            return -1;
      }

      if (!(codec->synth.chmap & (1 << idx))) {
            codec->synth.chmap |= 1 << idx;
            codec->synth.chcnt++;
            snd_ali_printk("alloc_pcm_channel no. %d.\n",idx);
            return idx;
      }
      return -1;
}

static int snd_ali_find_free_channel(struct snd_ali * codec, int rec)
{
      int idx;
      int result = -1;

      snd_ali_printk("find_free_channel: for %s\n",rec ? "rec" : "pcm");

      /* recording */
      if (rec) {
            if (codec->spdif_support &&
                (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
                 ALI_SPDIF_IN_SUPPORT))
                  idx = ALI_SPDIF_IN_CHANNEL;
            else
                  idx = ALI_PCM_IN_CHANNEL;

            result = snd_ali_alloc_pcm_channel(codec, idx);
            if (result >= 0)
                  return result;
            else {
                  snd_printk(KERN_ERR "ali_find_free_channel: "
                           "record channel is busy now.\n");
                  return -1;
            }
      }

      /* playback... */
      if (codec->spdif_support &&
          (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
           ALI_SPDIF_OUT_CH_ENABLE)) {
            idx = ALI_SPDIF_OUT_CHANNEL;
            result = snd_ali_alloc_pcm_channel(codec, idx);
            if (result >= 0)
                  return result;
            else
                  snd_printk(KERN_ERR "ali_find_free_channel: "
                           "S/PDIF out channel is in busy now.\n");
      }

      for (idx = 0; idx < ALI_CHANNELS; idx++) {
            result = snd_ali_alloc_pcm_channel(codec, idx);
            if (result >= 0)
                  return result;
      }
      snd_printk(KERN_ERR "ali_find_free_channel: no free channels.\n");
      return -1;
}

static void snd_ali_free_channel_pcm(struct snd_ali *codec, int channel)
{
      unsigned int idx = channel & 0x0000001f;

      snd_ali_printk("free_channel_pcm channel=%d\n",channel);

      if (channel < 0 || channel >= ALI_CHANNELS)
            return;

      if (!(codec->synth.chmap & (1 << idx))) {
            snd_printk(KERN_ERR "ali_free_channel_pcm: "
                     "channel %d is not in use.\n", channel);
            return;
      } else {
            codec->synth.chmap &= ~(1 << idx);
            codec->synth.chcnt--;
      }
}

#if 0 /* not used */
static void snd_ali_start_voice(struct snd_ali *codec, unsigned int channel)
{
      unsigned int mask = 1 << (channel & 0x1f);
      
      snd_ali_printk("start_voice: channel=%d\n",channel);
      outl(mask, ALI_REG(codec,codec->chregs.regs.start));
}
#endif

static void snd_ali_stop_voice(struct snd_ali *codec, unsigned int channel)
{
      unsigned int mask = 1 << (channel & 0x1f);

      snd_ali_printk("stop_voice: channel=%d\n",channel);
      outl(mask, ALI_REG(codec, codec->chregs.regs.stop));
}

/*
 *    S/PDIF Part
 */

static void snd_ali_delay(struct snd_ali *codec,int interval)
{
      unsigned long  begintimer,currenttimer;

      begintimer   = inl(ALI_REG(codec, ALI_STIMER));
      currenttimer = inl(ALI_REG(codec, ALI_STIMER));

      while (currenttimer < begintimer + interval) {
            if (snd_ali_stimer_ready(codec) < 0)
                  break;
            currenttimer = inl(ALI_REG(codec,  ALI_STIMER));
            cpu_relax();
      }
}

static void snd_ali_detect_spdif_rate(struct snd_ali *codec)
{
      u16 wval;
      u16 count = 0;
      u8  bval, R1 = 0, R2;

      bval  = inb(ALI_REG(codec, ALI_SPDIF_CTRL + 1));
      bval |= 0x1F;
      outb(bval, ALI_REG(codec, ALI_SPDIF_CTRL + 1));

      while ((R1 < 0x0b || R1 > 0x0e) && R1 != 0x12 && count <= 50000) {
            count ++;
            snd_ali_delay(codec, 6);
            bval = inb(ALI_REG(codec, ALI_SPDIF_CTRL + 1));
            R1 = bval & 0x1F;
      }

      if (count > 50000) {
            snd_printk(KERN_ERR "ali_detect_spdif_rate: timeout!\n");
            return;
      }

      for (count = 0; count <= 50000; count++) {
            snd_ali_delay(codec, 6);
            bval = inb(ALI_REG(codec,ALI_SPDIF_CTRL + 1));
            R2 = bval & 0x1F;
            if (R2 != R1)
                  R1 = R2;
            else
                  break;
      }

      if (count > 50000) {
            snd_printk(KERN_ERR "ali_detect_spdif_rate: timeout!\n");
            return;
      }

      if (R2 >= 0x0b && R2 <= 0x0e) {
            wval  = inw(ALI_REG(codec, ALI_SPDIF_CTRL + 2));
            wval &= 0xe0f0;
            wval |= (0x09 << 8) | 0x05;
            outw(wval, ALI_REG(codec, ALI_SPDIF_CTRL + 2));

            bval  = inb(ALI_REG(codec, ALI_SPDIF_CS + 3)) & 0xf0;
            outb(bval | 0x02, ALI_REG(codec, ALI_SPDIF_CS + 3));
      } else if (R2 == 0x12) {
            wval  = inw(ALI_REG(codec, ALI_SPDIF_CTRL + 2));
            wval &= 0xe0f0;
            wval |= (0x0e << 8) | 0x08;
            outw(wval, ALI_REG(codec, ALI_SPDIF_CTRL + 2));

            bval  = inb(ALI_REG(codec,ALI_SPDIF_CS + 3)) & 0xf0;
            outb(bval | 0x03, ALI_REG(codec, ALI_SPDIF_CS + 3));
      }
}

static unsigned int snd_ali_get_spdif_in_rate(struct snd_ali *codec)
{
      u32   dwRate;
      u8    bval;

      bval  = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
      bval &= 0x7f;
      bval |= 0x40;
      outb(bval, ALI_REG(codec, ALI_SPDIF_CTRL));

      snd_ali_detect_spdif_rate(codec);

      bval  = inb(ALI_REG(codec, ALI_SPDIF_CS + 3));
      bval &= 0x0f;

      switch (bval) {
      case 0: dwRate = 44100; break;
      case 1: dwRate = 48000; break;
      case 2: dwRate = 32000; break;
      default: dwRate = 0; break;
      }

      return dwRate;
}

static void snd_ali_enable_spdif_in(struct snd_ali *codec)
{     
      unsigned int dwVal;

      dwVal = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      dwVal |= ALI_SPDIF_IN_SUPPORT;
      outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));

      dwVal = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
      dwVal |= 0x02;
      outb(dwVal, ALI_REG(codec, ALI_SPDIF_CTRL));

      snd_ali_enable_special_channel(codec, ALI_SPDIF_IN_CHANNEL);
}

static void snd_ali_disable_spdif_in(struct snd_ali *codec)
{
      unsigned int dwVal;
      
      dwVal = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      dwVal &= ~ALI_SPDIF_IN_SUPPORT;
      outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
      
      snd_ali_disable_special_channel(codec, ALI_SPDIF_IN_CHANNEL);     
}


static void snd_ali_set_spdif_out_rate(struct snd_ali *codec, unsigned int rate)
{
      unsigned char  bVal;
      unsigned int  dwRate;
      
      switch (rate) {
      case 32000: dwRate = 0x300; break;
      case 48000: dwRate = 0x200; break;
      default: dwRate = 0; break;
      }
      
      bVal  = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
      bVal &= (unsigned char)(~(1<<6));
      
      bVal |= 0x80;           /* select right */
      outb(bVal, ALI_REG(codec, ALI_SPDIF_CTRL));
      outb(dwRate | 0x20, ALI_REG(codec, ALI_SPDIF_CS + 2));
      
      bVal &= ~0x80;    /* select left */
      outb(bVal, ALI_REG(codec, ALI_SPDIF_CTRL));
      outw(rate | 0x10, ALI_REG(codec, ALI_SPDIF_CS + 2));
}

static void snd_ali_enable_spdif_out(struct snd_ali *codec)
{
      unsigned short wVal;
      unsigned char bVal;
        struct pci_dev *pci_dev;

        pci_dev = codec->pci_m1533;
        if (pci_dev == NULL)
                return;
        pci_read_config_byte(pci_dev, 0x61, &bVal);
        bVal |= 0x40;
        pci_write_config_byte(pci_dev, 0x61, bVal);
        pci_read_config_byte(pci_dev, 0x7d, &bVal);
        bVal |= 0x01;
        pci_write_config_byte(pci_dev, 0x7d, bVal);

        pci_read_config_byte(pci_dev, 0x7e, &bVal);
        bVal &= (~0x20);
        bVal |= 0x10;
        pci_write_config_byte(pci_dev, 0x7e, bVal);

      bVal = inb(ALI_REG(codec, ALI_SCTRL));
      outb(bVal | ALI_SPDIF_OUT_ENABLE, ALI_REG(codec, ALI_SCTRL));

      bVal = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
      outb(bVal & ALI_SPDIF_OUT_CH_STATUS, ALI_REG(codec, ALI_SPDIF_CTRL));
   
      wVal = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      wVal |= ALI_SPDIF_OUT_SEL_PCM;
      outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
      snd_ali_disable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
}

static void snd_ali_enable_spdif_chnout(struct snd_ali *codec)
{
      unsigned short wVal;

      wVal  = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      wVal &= ~ALI_SPDIF_OUT_SEL_PCM;
      outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
/*
      wVal = inw(ALI_REG(codec, ALI_SPDIF_CS));
      if (flag & ALI_SPDIF_OUT_NON_PCM)
            wVal |= 0x0002;
      else  
            wVal &= (~0x0002);
      outw(wVal, ALI_REG(codec, ALI_SPDIF_CS));
*/
      snd_ali_enable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
}

static void snd_ali_disable_spdif_chnout(struct snd_ali *codec)
{
      unsigned short wVal;

      wVal  = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
      wVal |= ALI_SPDIF_OUT_SEL_PCM;
      outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));

      snd_ali_enable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
}

static void snd_ali_disable_spdif_out(struct snd_ali *codec)
{
      unsigned char  bVal;

      bVal = inb(ALI_REG(codec, ALI_SCTRL));
      outb(bVal & ~ALI_SPDIF_OUT_ENABLE, ALI_REG(codec, ALI_SCTRL));

      snd_ali_disable_spdif_chnout(codec);
}

static void snd_ali_update_ptr(struct snd_ali *codec, int channel)
{
      struct snd_ali_voice *pvoice;
      struct snd_pcm_runtime *runtime;
      struct snd_ali_channel_control *pchregs;
      unsigned int old, mask;
#ifdef ALI_DEBUG
      unsigned int temp, cspf;
#endif

      pchregs = &(codec->chregs);

      /* check if interrupt occurred for channel */
      old  = pchregs->data.aint;
      mask = 1U << (channel & 0x1f);

      if (!(old & mask))
            return;

      pvoice = &codec->synth.voices[channel];
      runtime = pvoice->substream->runtime;

      udelay(100);
      spin_lock(&codec->reg_lock);

      if (pvoice->pcm && pvoice->substream) {
            /* pcm interrupt */
#ifdef ALI_DEBUG
            outb((u8)(pvoice->number), ALI_REG(codec, ALI_GC_CIR));
            temp = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
            cspf = (inl(ALI_REG(codec, ALI_CSPF)) & mask) == mask;
#endif
            if (pvoice->running) {
                  snd_ali_printk("update_ptr: cso=%4.4x cspf=%d.\n",
                               (u16)temp, cspf);
                  spin_unlock(&codec->reg_lock);
                  snd_pcm_period_elapsed(pvoice->substream);
                  spin_lock(&codec->reg_lock);
            } else {
                  snd_ali_stop_voice(codec, channel);
                  snd_ali_disable_voice_irq(codec, channel);
            }     
      } else if (codec->synth.voices[channel].synth) {
            /* synth interrupt */
      } else if (codec->synth.voices[channel].midi) {
            /* midi interrupt */
      } else {
            /* unknown interrupt */
            snd_ali_stop_voice(codec, channel);
            snd_ali_disable_voice_irq(codec, channel);
      }
      spin_unlock(&codec->reg_lock);
      outl(mask,ALI_REG(codec,pchregs->regs.aint));
      pchregs->data.aint = old & (~mask);
}

static irqreturn_t snd_ali_card_interrupt(int irq, void *dev_id)
{
      struct snd_ali    *codec = dev_id;
      int channel;
      unsigned int audio_int;
      struct snd_ali_channel_control *pchregs;

      if (codec == NULL || !codec->hw_initialized)
            return IRQ_NONE;

      audio_int = inl(ALI_REG(codec, ALI_MISCINT));
      if (!audio_int)
            return IRQ_NONE;

      pchregs = &(codec->chregs);
      if (audio_int & ADDRESS_IRQ) {
            /* get interrupt status for all channels */
            pchregs->data.aint = inl(ALI_REG(codec, pchregs->regs.aint));
            for (channel = 0; channel < ALI_CHANNELS; channel++)
                  snd_ali_update_ptr(codec, channel);
      }
      outl((TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW),
            ALI_REG(codec, ALI_MISCINT));

      return IRQ_HANDLED;
}


static struct snd_ali_voice *snd_ali_alloc_voice(struct snd_ali * codec,
                                     int type, int rec, int channel)
{
      struct snd_ali_voice *pvoice;
      int idx;

      snd_ali_printk("alloc_voice: type=%d rec=%d\n", type, rec);

      spin_lock_irq(&codec->voice_alloc);
      if (type == SNDRV_ALI_VOICE_TYPE_PCM) {
            idx = channel > 0 ? snd_ali_alloc_pcm_channel(codec, channel) :
                  snd_ali_find_free_channel(codec,rec);
            if (idx < 0) {
                  snd_printk(KERN_ERR "ali_alloc_voice: err.\n");
                  spin_unlock_irq(&codec->voice_alloc);
                  return NULL;
            }
            pvoice = &(codec->synth.voices[idx]);
            pvoice->codec = codec;
            pvoice->use = 1;
            pvoice->pcm = 1;
            pvoice->mode = rec;
            spin_unlock_irq(&codec->voice_alloc);
            return pvoice;
      }
      spin_unlock_irq(&codec->voice_alloc);
      return NULL;
}


static void snd_ali_free_voice(struct snd_ali * codec,
                         struct snd_ali_voice *pvoice)
{
      void (*private_free)(void *);
      void *private_data;

      snd_ali_printk("free_voice: channel=%d\n",pvoice->number);
      if (pvoice == NULL || !pvoice->use)
            return;
      snd_ali_clear_voices(codec, pvoice->number, pvoice->number);
      spin_lock_irq(&codec->voice_alloc);
      private_free = pvoice->private_free;
      private_data = pvoice->private_data;
      pvoice->private_free = NULL;
      pvoice->private_data = NULL;
      if (pvoice->pcm)
            snd_ali_free_channel_pcm(codec, pvoice->number);
      pvoice->use = pvoice->pcm = pvoice->synth = 0;
      pvoice->substream = NULL;
      spin_unlock_irq(&codec->voice_alloc);
      if (private_free)
            private_free(private_data);
}


static void snd_ali_clear_voices(struct snd_ali *codec,
                         unsigned int v_min,
                         unsigned int v_max)
{
      unsigned int i;

      for (i = v_min; i <= v_max; i++) {
            snd_ali_stop_voice(codec, i);
            snd_ali_disable_voice_irq(codec, i);
      }
}

static void snd_ali_write_voice_regs(struct snd_ali *codec,
                   unsigned int Channel,
                   unsigned int LBA,
                   unsigned int CSO,
                   unsigned int ESO,
                   unsigned int DELTA,
                   unsigned int ALPHA_FMS,
                   unsigned int GVSEL,
                   unsigned int PAN,
                   unsigned int VOL,
                   unsigned int CTRL,
                   unsigned int EC)
{
      unsigned int ctlcmds[4];
      
      outb((unsigned char)(Channel & 0x001f), ALI_REG(codec, ALI_GC_CIR));

      ctlcmds[0] =  (CSO << 16) | (ALPHA_FMS & 0x0000ffff);
      ctlcmds[1] =  LBA;
      ctlcmds[2] =  (ESO << 16) | (DELTA & 0x0ffff);
      ctlcmds[3] =  (GVSEL << 31) |
                  ((PAN & 0x0000007f) << 24) |
                  ((VOL & 0x000000ff) << 16) |
                  ((CTRL & 0x0000000f) << 12) |
                  (EC & 0x00000fff);

      outb(Channel, ALI_REG(codec, ALI_GC_CIR));

      outl(ctlcmds[0], ALI_REG(codec, ALI_CSO_ALPHA_FMS));
      outl(ctlcmds[1], ALI_REG(codec, ALI_LBA));
      outl(ctlcmds[2], ALI_REG(codec, ALI_ESO_DELTA));
      outl(ctlcmds[3], ALI_REG(codec, ALI_GVSEL_PAN_VOC_CTRL_EC));

      outl(0x30000000, ALI_REG(codec, ALI_EBUF1));    /* Still Mode */
      outl(0x30000000, ALI_REG(codec, ALI_EBUF2));    /* Still Mode */
}

static unsigned int snd_ali_convert_rate(unsigned int rate, int rec)
{
      unsigned int delta;

      if (rate < 4000)
            rate = 4000;
      if (rate > 48000)
            rate = 48000;

      if (rec) {
            if (rate == 44100)
                  delta = 0x116a;
            else if (rate == 8000)
                  delta = 0x6000;
            else if (rate == 48000)
                  delta = 0x1000;
            else
                  delta = ((48000 << 12) / rate) & 0x0000ffff;
      } else {
            if (rate == 44100)
                  delta = 0xeb3;
            else if (rate == 8000)
                  delta = 0x2ab;
            else if (rate == 48000)
                  delta = 0x1000;
            else 
                  delta = (((rate << 12) + rate) / 48000) & 0x0000ffff;
      }

      return delta;
}

static unsigned int snd_ali_control_mode(struct snd_pcm_substream *substream)
{
      unsigned int CTRL;
      struct snd_pcm_runtime *runtime = substream->runtime;

      /* set ctrl mode
         CTRL default: 8-bit (unsigned) mono, loop mode enabled
       */
      CTRL = 0x00000001;
      if (snd_pcm_format_width(runtime->format) == 16)
            CTRL |= 0x00000008;     /* 16-bit data */
      if (!snd_pcm_format_unsigned(runtime->format))
            CTRL |= 0x00000002;     /* signed data */
      if (runtime->channels > 1)
            CTRL |= 0x00000004;     /* stereo data */
      return CTRL;
}

/*
 *  PCM part
 */

static int snd_ali_trigger(struct snd_pcm_substream *substream,
                         int cmd)
                            
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_substream *s;
      unsigned int what, whati, capture_flag;
      struct snd_ali_voice *pvoice, *evoice;
      unsigned int val;
      int do_start;

      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
      case SNDRV_PCM_TRIGGER_RESUME:
            do_start = 1;
            break;
      case SNDRV_PCM_TRIGGER_STOP:
      case SNDRV_PCM_TRIGGER_SUSPEND:
            do_start = 0;
            break;
      default:
            return -EINVAL;
      }

      what = whati = capture_flag = 0;
      snd_pcm_group_for_each_entry(s, substream) {
            if ((struct snd_ali *) snd_pcm_substream_chip(s) == codec) {
                  pvoice = s->runtime->private_data;
                  evoice = pvoice->extra;
                  what |= 1 << (pvoice->number & 0x1f);
                  if (evoice == NULL)
                        whati |= 1 << (pvoice->number & 0x1f);
                  else {
                        whati |= 1 << (evoice->number & 0x1f);
                        what |= 1 << (evoice->number & 0x1f);
                  }
                  if (do_start) {
                        pvoice->running = 1;
                        if (evoice != NULL)
                              evoice->running = 1;
                  } else {
                        pvoice->running = 0;
                        if (evoice != NULL)
                              evoice->running = 0;
                  }
                  snd_pcm_trigger_done(s, substream);
                  if (pvoice->mode)
                        capture_flag = 1;
            }
      }
      spin_lock(&codec->reg_lock);
      if (!do_start)
            outl(what, ALI_REG(codec, ALI_STOP));
      val = inl(ALI_REG(codec, ALI_AINTEN));
      if (do_start)
            val |= whati;
      else
            val &= ~whati;
      outl(val, ALI_REG(codec, ALI_AINTEN));
      if (do_start)
            outl(what, ALI_REG(codec, ALI_START));
      snd_ali_printk("trigger: what=%xh whati=%xh\n", what, whati);
      spin_unlock(&codec->reg_lock);

      return 0;
}

static int snd_ali_playback_hw_params(struct snd_pcm_substream *substream,
                              struct snd_pcm_hw_params *hw_params)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      struct snd_ali_voice *evoice = pvoice->extra;
      int err;

      err = snd_pcm_lib_malloc_pages(substream,
                               params_buffer_bytes(hw_params));
      if (err < 0)
            return err;
      
      /* voice management */

      if (params_buffer_size(hw_params) / 2 !=
          params_period_size(hw_params)) {
            if (!evoice) {
                  evoice = snd_ali_alloc_voice(codec,
                                         SNDRV_ALI_VOICE_TYPE_PCM,
                                         0, -1);
                  if (!evoice)
                        return -ENOMEM;
                  pvoice->extra = evoice;
                  evoice->substream = substream;
            }
      } else {
            if (evoice) {
                  snd_ali_free_voice(codec, evoice);
                  pvoice->extra = evoice = NULL;
            }
      }

      return 0;
}

static int snd_ali_playback_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      struct snd_ali_voice *evoice = pvoice ? pvoice->extra : NULL;

      snd_pcm_lib_free_pages(substream);
      if (evoice) {
            snd_ali_free_voice(codec, evoice);
            pvoice->extra = NULL;
      }
      return 0;
}

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

static int snd_ali_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      struct snd_ali_voice *evoice = pvoice->extra;

      unsigned int LBA;
      unsigned int Delta;
      unsigned int ESO;
      unsigned int CTRL;
      unsigned int GVSEL;
      unsigned int PAN;
      unsigned int VOL;
      unsigned int EC;
      
      snd_ali_printk("playback_prepare ...\n");

      spin_lock_irq(&codec->reg_lock);    
      
      /* set Delta (rate) value */
      Delta = snd_ali_convert_rate(runtime->rate, 0);

      if (pvoice->number == ALI_SPDIF_IN_CHANNEL || 
          pvoice->number == ALI_PCM_IN_CHANNEL)
            snd_ali_disable_special_channel(codec, pvoice->number);
      else if (codec->spdif_support &&
             (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
              ALI_SPDIF_OUT_CH_ENABLE)
             && pvoice->number == ALI_SPDIF_OUT_CHANNEL) {
            snd_ali_set_spdif_out_rate(codec, runtime->rate);
            Delta = 0x1000;
      }
      
      /* set Loop Back Address */
      LBA = runtime->dma_addr;

      /* set interrupt count size */
      pvoice->count = runtime->period_size;

      /* set target ESO for channel */
      pvoice->eso = runtime->buffer_size; 

      snd_ali_printk("playback_prepare: eso=%xh count=%xh\n",
                   pvoice->eso, pvoice->count);

      /* set ESO to capture first MIDLP interrupt */
      ESO = pvoice->eso -1;
      /* set ctrl mode */
      CTRL = snd_ali_control_mode(substream);

      GVSEL = 1;
      PAN = 0;
      VOL = 0;
      EC = 0;
      snd_ali_printk("playback_prepare:\n");
      snd_ali_printk("ch=%d, Rate=%d Delta=%xh,GVSEL=%xh,PAN=%xh,CTRL=%xh\n",
                   pvoice->number,runtime->rate,Delta,GVSEL,PAN,CTRL);
      snd_ali_write_voice_regs(codec,
                         pvoice->number,
                         LBA,
                         0,   /* cso */
                         ESO,
                         Delta,
                         0,   /* alpha */
                         GVSEL,
                         PAN,
                         VOL,
                         CTRL,
                         EC);
      if (evoice) {
            evoice->count = pvoice->count;
            evoice->eso = pvoice->count << 1;
            ESO = evoice->eso - 1;
            snd_ali_write_voice_regs(codec,
                               evoice->number,
                               LBA,
                               0,   /* cso */
                               ESO,
                               Delta,
                               0,   /* alpha */
                               GVSEL,
                               0x7f,
                               0x3ff,
                               CTRL,
                               EC);
      }
      spin_unlock_irq(&codec->reg_lock);
      return 0;
}


static int snd_ali_prepare(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      unsigned int LBA;
      unsigned int Delta;
      unsigned int ESO;
      unsigned int CTRL;
      unsigned int GVSEL;
      unsigned int PAN;
      unsigned int VOL;
      unsigned int EC;
      u8     bValue;

      spin_lock_irq(&codec->reg_lock);

      snd_ali_printk("ali_prepare...\n");

      snd_ali_enable_special_channel(codec,pvoice->number);

      Delta = (pvoice->number == ALI_MODEM_IN_CHANNEL ||
             pvoice->number == ALI_MODEM_OUT_CHANNEL) ? 
            0x1000 : snd_ali_convert_rate(runtime->rate, pvoice->mode);

      /* Prepare capture intr channel */
      if (pvoice->number == ALI_SPDIF_IN_CHANNEL) {

            unsigned int rate;
            
            spin_unlock_irq(&codec->reg_lock);
            if (codec->revision != ALI_5451_V02)
                  return -1;

            rate = snd_ali_get_spdif_in_rate(codec);
            if (rate == 0) {
                  snd_printk(KERN_WARNING "ali_capture_preapre: "
                           "spdif rate detect err!\n");
                  rate = 48000;
            }
            spin_lock_irq(&codec->reg_lock);
            bValue = inb(ALI_REG(codec,ALI_SPDIF_CTRL));
            if (bValue & 0x10) {
                  outb(bValue,ALI_REG(codec,ALI_SPDIF_CTRL));
                  printk(KERN_WARNING "clear SPDIF parity error flag.\n");
            }

            if (rate != 48000)
                  Delta = ((rate << 12) / runtime->rate) & 0x00ffff;
      }

      /* set target ESO for channel  */
      pvoice->eso = runtime->buffer_size; 

      /* set interrupt count size  */
      pvoice->count = runtime->period_size;

      /* set Loop Back Address  */
      LBA = runtime->dma_addr;

      /* set ESO to capture first MIDLP interrupt  */
      ESO = pvoice->eso - 1;
      CTRL = snd_ali_control_mode(substream);
      GVSEL = 0;
      PAN = 0x00;
      VOL = 0x00;
      EC = 0;

      snd_ali_write_voice_regs(    codec,
                             pvoice->number,
                             LBA,
                             0,     /* cso */
                             ESO,
                             Delta,
                             0,     /* alpha */
                             GVSEL,
                             PAN,
                             VOL,
                             CTRL,
                             EC);

      spin_unlock_irq(&codec->reg_lock);

      return 0;
}


static snd_pcm_uframes_t
snd_ali_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      unsigned int cso;

      spin_lock(&codec->reg_lock);
      if (!pvoice->running) {
            spin_unlock(&codec->reg_lock);
            return 0;
      }
      outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
      cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
      spin_unlock(&codec->reg_lock);
      snd_ali_printk("playback pointer returned cso=%xh.\n", cso);

      return cso;
}


static snd_pcm_uframes_t snd_ali_pointer(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice = runtime->private_data;
      unsigned int cso;

      spin_lock(&codec->reg_lock);
      if (!pvoice->running) {
            spin_unlock_irq(&codec->reg_lock);
            return 0;
      }
      outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
      cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
      spin_unlock(&codec->reg_lock);

      return cso;
}

static struct snd_pcm_hardware snd_ali_playback =
{
      .info =           (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                   SNDRV_PCM_INFO_BLOCK_TRANSFER |
                   SNDRV_PCM_INFO_MMAP_VALID |
                   SNDRV_PCM_INFO_RESUME |
                   SNDRV_PCM_INFO_SYNC_START),
      .formats =  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
                   SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
      .rates =    SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
      .rate_min =       4000,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (256*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (256*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

/*
 *  Capture support device description
 */

static struct snd_pcm_hardware snd_ali_capture =
{
      .info =           (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                   SNDRV_PCM_INFO_BLOCK_TRANSFER |
                   SNDRV_PCM_INFO_MMAP_VALID |
                   SNDRV_PCM_INFO_RESUME |
                   SNDRV_PCM_INFO_SYNC_START),
      .formats =  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
                   SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
      .rates =    SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
      .rate_min =       4000,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static void snd_ali_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
      struct snd_ali_voice *pvoice = runtime->private_data;
      struct snd_ali *codec;

      if (pvoice) {
            codec = pvoice->codec;
            snd_ali_free_voice(pvoice->codec, pvoice);
      }
}

static int snd_ali_open(struct snd_pcm_substream *substream, int rec,
                  int channel, struct snd_pcm_hardware *phw)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_ali_voice *pvoice;

      pvoice = snd_ali_alloc_voice(codec, SNDRV_ALI_VOICE_TYPE_PCM, rec,
                             channel);
      if (!pvoice)
            return -EAGAIN;

      pvoice->substream = substream;
      runtime->private_data = pvoice;
      runtime->private_free = snd_ali_pcm_free_substream;

      runtime->hw = *phw;
      snd_pcm_set_sync(substream);
      snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
                             0, 64*1024);
      return 0;
}

static int snd_ali_playback_open(struct snd_pcm_substream *substream)
{
      return snd_ali_open(substream, 0, -1, &snd_ali_playback);
}

static int snd_ali_capture_open(struct snd_pcm_substream *substream)
{
      return snd_ali_open(substream, 1, -1, &snd_ali_capture);
}

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

static int snd_ali_close(struct snd_pcm_substream *substream)
{
      struct snd_ali *codec = snd_pcm_substream_chip(substream);
      struct snd_ali_voice *pvoice = substream->runtime->private_data;

      snd_ali_disable_special_channel(codec,pvoice->number);

      return 0;
}

static struct snd_pcm_ops snd_ali_playback_ops = {
      .open =           snd_ali_playback_open,
      .close =    snd_ali_playback_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ali_playback_hw_params,
      .hw_free =  snd_ali_playback_hw_free,
      .prepare =  snd_ali_playback_prepare,
      .trigger =  snd_ali_trigger,
      .pointer =  snd_ali_playback_pointer,
};

static struct snd_pcm_ops snd_ali_capture_ops = {
      .open =           snd_ali_capture_open,
      .close =    snd_ali_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ali_hw_params,
      .hw_free =  snd_ali_hw_free,
      .prepare =  snd_ali_prepare,
      .trigger =  snd_ali_trigger,
      .pointer =  snd_ali_pointer,
};

/*
 * Modem PCM
 */

static int snd_ali_modem_hw_params(struct snd_pcm_substream *substream,
                         struct snd_pcm_hw_params *hw_params)
{
      struct snd_ali *chip = snd_pcm_substream_chip(substream);
      unsigned int modem_num = chip->num_of_codecs - 1;
      snd_ac97_write(chip->ac97[modem_num], AC97_LINE1_RATE,
                   params_rate(hw_params));
      snd_ac97_write(chip->ac97[modem_num], AC97_LINE1_LEVEL, 0);
      return snd_ali_hw_params(substream, hw_params);
}

static struct snd_pcm_hardware snd_ali_modem =
{
      .info =           (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                   SNDRV_PCM_INFO_BLOCK_TRANSFER |
                   SNDRV_PCM_INFO_MMAP_VALID |
                   SNDRV_PCM_INFO_RESUME |
                   SNDRV_PCM_INFO_SYNC_START),
      .formats =  SNDRV_PCM_FMTBIT_S16_LE,
      .rates =    (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000 |
                   SNDRV_PCM_RATE_16000),
      .rate_min =       8000,
      .rate_max =       16000,
      .channels_min =         1,
      .channels_max =         1,
      .buffer_bytes_max =     (256*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (256*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static int snd_ali_modem_open(struct snd_pcm_substream *substream, int rec,
                        int channel)
{
      static unsigned int rates[] = {8000, 9600, 12000, 16000};
      static struct snd_pcm_hw_constraint_list hw_constraint_rates = {
            .count = ARRAY_SIZE(rates),
            .list = rates,
            .mask = 0,
      };
      int err = snd_ali_open(substream, rec, channel, &snd_ali_modem);

      if (err)
            return err;
      return snd_pcm_hw_constraint_list(substream->runtime, 0,
                  SNDRV_PCM_HW_PARAM_RATE, &hw_constraint_rates);
}

static int snd_ali_modem_playback_open(struct snd_pcm_substream *substream)
{
      return snd_ali_modem_open(substream, 0, ALI_MODEM_OUT_CHANNEL);
}

static int snd_ali_modem_capture_open(struct snd_pcm_substream *substream)
{
      return snd_ali_modem_open(substream, 1, ALI_MODEM_IN_CHANNEL);
}

static struct snd_pcm_ops snd_ali_modem_playback_ops = {
      .open =           snd_ali_modem_playback_open,
      .close =    snd_ali_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ali_modem_hw_params,
      .hw_free =  snd_ali_hw_free,
      .prepare =  snd_ali_prepare,
      .trigger =  snd_ali_trigger,
      .pointer =  snd_ali_pointer,
};

static struct snd_pcm_ops snd_ali_modem_capture_ops = {
      .open =           snd_ali_modem_capture_open,
      .close =    snd_ali_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ali_modem_hw_params,
      .hw_free =  snd_ali_hw_free,
      .prepare =  snd_ali_prepare,
      .trigger =  snd_ali_trigger,
      .pointer =  snd_ali_pointer,
};


struct ali_pcm_description {
      char *name;
      unsigned int playback_num;
      unsigned int capture_num;
      struct snd_pcm_ops *playback_ops;
      struct snd_pcm_ops *capture_ops;
      unsigned short class;
};


static void snd_ali_pcm_free(struct snd_pcm *pcm)
{
      struct snd_ali *codec = pcm->private_data;
      codec->pcm[pcm->device] = NULL;
}


static int __devinit snd_ali_pcm(struct snd_ali * codec, int device,
                         struct ali_pcm_description *desc)
{
      struct snd_pcm *pcm;
      int err;

      err = snd_pcm_new(codec->card, desc->name, device,
                    desc->playback_num, desc->capture_num, &pcm);
      if (err < 0) {
            snd_printk(KERN_ERR "snd_ali_pcm: err called snd_pcm_new.\n");
            return err;
      }
      pcm->private_data = codec;
      pcm->private_free = snd_ali_pcm_free;
      if (desc->playback_ops)
            snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
                        desc->playback_ops);
      if (desc->capture_ops)
            snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
                        desc->capture_ops);

      snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                    snd_dma_pci_data(codec->pci),
                                    64*1024, 128*1024);

      pcm->info_flags = 0;
      pcm->dev_class = desc->class;
      pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
      strcpy(pcm->name, desc->name);
      codec->pcm[0] = pcm;
      return 0;
}

static struct ali_pcm_description ali_pcms[] = {
      { .name = "ALI 5451",
        .playback_num = ALI_CHANNELS,
        .capture_num = 1,
        .playback_ops = &snd_ali_playback_ops,
        .capture_ops = &snd_ali_capture_ops
      },
      { .name = "ALI 5451 modem",
        .playback_num = 1,
        .capture_num = 1,
        .playback_ops = &snd_ali_modem_playback_ops,
        .capture_ops = &snd_ali_modem_capture_ops,
        .class = SNDRV_PCM_CLASS_MODEM
      }
};

static int __devinit snd_ali_build_pcms(struct snd_ali *codec)
{
      int i, err;
      for (i = 0; i < codec->num_of_codecs && i < ARRAY_SIZE(ali_pcms); i++) {
            err = snd_ali_pcm(codec, i, &ali_pcms[i]);
            if (err < 0)
                  return err;
      }
      return 0;
}


#define ALI5451_SPDIF(xname, xindex, value) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex,\
.info = snd_ali5451_spdif_info, .get = snd_ali5451_spdif_get, \
.put = snd_ali5451_spdif_put, .private_value = value}

#define snd_ali5451_spdif_info            snd_ctl_boolean_mono_info

static int snd_ali5451_spdif_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ali *codec = kcontrol->private_data;
      unsigned int spdif_enable;

      spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;

      spin_lock_irq(&codec->reg_lock);
      switch (kcontrol->private_value) {
      case 0:
            spdif_enable = (codec->spdif_mask & 0x02) ? 1 : 0;
            break;
      case 1:
            spdif_enable = ((codec->spdif_mask & 0x02) &&
                    (codec->spdif_mask & 0x04)) ? 1 : 0;
            break;
      case 2:
            spdif_enable = (codec->spdif_mask & 0x01) ? 1 : 0;
            break;
      default:
            break;
      }
      ucontrol->value.integer.value[0] = spdif_enable;
      spin_unlock_irq(&codec->reg_lock);
      return 0;
}

static int snd_ali5451_spdif_put(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ali *codec = kcontrol->private_data;
      unsigned int change = 0, spdif_enable = 0;

      spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;

      spin_lock_irq(&codec->reg_lock);
      switch (kcontrol->private_value) {
      case 0:
            change = (codec->spdif_mask & 0x02) ? 1 : 0;
            change = change ^ spdif_enable;
            if (change) {
                  if (spdif_enable) {
                        codec->spdif_mask |= 0x02;
                        snd_ali_enable_spdif_out(codec);
                  } else {
                        codec->spdif_mask &= ~(0x02);
                        codec->spdif_mask &= ~(0x04);
                        snd_ali_disable_spdif_out(codec);
                  }
            }
            break;
      case 1: 
            change = (codec->spdif_mask & 0x04) ? 1 : 0;
            change = change ^ spdif_enable;
            if (change && (codec->spdif_mask & 0x02)) {
                  if (spdif_enable) {
                        codec->spdif_mask |= 0x04;
                        snd_ali_enable_spdif_chnout(codec);
                  } else {
                        codec->spdif_mask &= ~(0x04);
                        snd_ali_disable_spdif_chnout(codec);
                  }
            }
            break;
      case 2:
            change = (codec->spdif_mask & 0x01) ? 1 : 0;
            change = change ^ spdif_enable;
            if (change) {
                  if (spdif_enable) {
                        codec->spdif_mask |= 0x01;
                        snd_ali_enable_spdif_in(codec);
                  } else {
                        codec->spdif_mask &= ~(0x01);
                        snd_ali_disable_spdif_in(codec);
                  }
            }
            break;
      default:
            break;
      }
      spin_unlock_irq(&codec->reg_lock);
      
      return change;
}

static struct snd_kcontrol_new snd_ali5451_mixer_spdif[] __devinitdata = {
      /* spdif aplayback switch */
      /* FIXME: "IEC958 Playback Switch" may conflict with one on ac97_codec */
      ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("Output ",NONE,SWITCH), 0, 0),
      /* spdif out to spdif channel */
      ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("Channel Output ",NONE,SWITCH), 0, 1),
      /* spdif in from spdif channel */
      ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH), 0, 2)
};

static int __devinit snd_ali_mixer(struct snd_ali * codec)
{
      struct snd_ac97_template ac97;
      unsigned int idx;
      int i, err;
      static struct snd_ac97_bus_ops ops = {
            .write = snd_ali_codec_write,
            .read = snd_ali_codec_read,
      };

      err = snd_ac97_bus(codec->card, 0, &ops, codec, &codec->ac97_bus);
      if (err < 0)
            return err;

      memset(&ac97, 0, sizeof(ac97));
      ac97.private_data = codec;

      for (i = 0; i < codec->num_of_codecs; i++) {
            ac97.num = i;
            err = snd_ac97_mixer(codec->ac97_bus, &ac97, &codec->ac97[i]);
            if (err < 0) {
                  snd_printk(KERN_ERR
                           "ali mixer %d creating error.\n", i);
                  if (i == 0)
                        return err;
                  codec->num_of_codecs = 1;
                  break;
            }
      }

      if (codec->spdif_support) {
            for (idx = 0; idx < ARRAY_SIZE(snd_ali5451_mixer_spdif); idx++) {
                  err = snd_ctl_add(codec->card,
                                snd_ctl_new1(&snd_ali5451_mixer_spdif[idx], codec));
                  if (err < 0)
                        return err;
            }
      }
      return 0;
}

#ifdef CONFIG_PM
static int ali_suspend(struct pci_dev *pci, pm_message_t state)
{
      struct snd_card *card = pci_get_drvdata(pci);
      struct snd_ali *chip = card->private_data;
      struct snd_ali_image *im;
      int i, j;

      im = chip->image;
      if (!im)
            return 0;

      snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
      for (i = 0; i < chip->num_of_codecs; i++) {
            snd_pcm_suspend_all(chip->pcm[i]);
            snd_ac97_suspend(chip->ac97[i]);
      }

      spin_lock_irq(&chip->reg_lock);
      
      im->regs[ALI_MISCINT >> 2] = inl(ALI_REG(chip, ALI_MISCINT));
      /* im->regs[ALI_START >> 2] = inl(ALI_REG(chip, ALI_START)); */
      im->regs[ALI_STOP >> 2] = inl(ALI_REG(chip, ALI_STOP));
      
      /* disable all IRQ bits */
      outl(0, ALI_REG(chip, ALI_MISCINT));
      
      for (i = 0; i < ALI_GLOBAL_REGS; i++) {   
            if ((i*4 == ALI_MISCINT) || (i*4 == ALI_STOP))
                  continue;
            im->regs[i] = inl(ALI_REG(chip, i*4));
      }
      
      for (i = 0; i < ALI_CHANNELS; i++) {
            outb(i, ALI_REG(chip, ALI_GC_CIR));
            for (j = 0; j < ALI_CHANNEL_REGS; j++) 
                  im->channel_regs[i][j] = inl(ALI_REG(chip, j*4 + 0xe0));
      }

      /* stop all HW channel */
      outl(0xffffffff, ALI_REG(chip, ALI_STOP));

      spin_unlock_irq(&chip->reg_lock);

      pci_disable_device(pci);
      pci_save_state(pci);
      pci_set_power_state(pci, pci_choose_state(pci, state));
      return 0;
}

static int ali_resume(struct pci_dev *pci)
{
      struct snd_card *card = pci_get_drvdata(pci);
      struct snd_ali *chip = card->private_data;
      struct snd_ali_image *im;
      int i, j;

      im = chip->image;
      if (!im)
            return 0;

      pci_set_power_state(pci, PCI_D0);
      pci_restore_state(pci);
      if (pci_enable_device(pci) < 0) {
            printk(KERN_ERR "ali5451: pci_enable_device failed, "
                   "disabling device\n");
            snd_card_disconnect(card);
            return -EIO;
      }
      pci_set_master(pci);

      spin_lock_irq(&chip->reg_lock);
      
      for (i = 0; i < ALI_CHANNELS; i++) {
            outb(i, ALI_REG(chip, ALI_GC_CIR));
            for (j = 0; j < ALI_CHANNEL_REGS; j++) 
                  outl(im->channel_regs[i][j], ALI_REG(chip, j*4 + 0xe0));
      }
      
      for (i = 0; i < ALI_GLOBAL_REGS; i++) {   
            if ((i*4 == ALI_MISCINT) || (i*4 == ALI_STOP) ||
                (i*4 == ALI_START))
                  continue;
            outl(im->regs[i], ALI_REG(chip, i*4));
      }
      
      /* start HW channel */
      outl(im->regs[ALI_START >> 2], ALI_REG(chip, ALI_START));
      /* restore IRQ enable bits */
      outl(im->regs[ALI_MISCINT >> 2], ALI_REG(chip, ALI_MISCINT));
      
      spin_unlock_irq(&chip->reg_lock);

      for (i = 0 ; i < chip->num_of_codecs; i++)
            snd_ac97_resume(chip->ac97[i]);
      
      snd_power_change_state(card, SNDRV_CTL_POWER_D0);
      return 0;
}
#endif /* CONFIG_PM */

static int snd_ali_free(struct snd_ali * codec)
{
      if (codec->hw_initialized)
            snd_ali_disable_address_interrupt(codec);
      if (codec->irq >= 0)
            free_irq(codec->irq, codec);
      if (codec->port)
            pci_release_regions(codec->pci);
      pci_disable_device(codec->pci);
#ifdef CONFIG_PM
      kfree(codec->image);
#endif
      pci_dev_put(codec->pci_m1533);
      pci_dev_put(codec->pci_m7101);
      kfree(codec);
      return 0;
}

static int snd_ali_chip_init(struct snd_ali *codec)
{
      unsigned int legacy;
      unsigned char temp;
      struct pci_dev *pci_dev;

      snd_ali_printk("chip initializing ... \n");

      if (snd_ali_reset_5451(codec)) {
            snd_printk(KERN_ERR "ali_chip_init: reset 5451 error.\n");
            return -1;
      }

      if (codec->revision == ALI_5451_V02) {
            pci_dev = codec->pci_m1533;
            pci_read_config_byte(pci_dev, 0x59, &temp);
            temp |= 0x80;
            pci_write_config_byte(pci_dev, 0x59, temp);
      
            pci_dev = codec->pci_m7101;
            pci_read_config_byte(pci_dev, 0xb8, &temp);
            temp |= 0x20;
            pci_write_config_byte(pci_dev, 0xB8, temp);
      }

      pci_read_config_dword(codec->pci, 0x44, &legacy);
      legacy &= 0xff00ff00;
      legacy |= 0x000800aa;
      pci_write_config_dword(codec->pci, 0x44, legacy);

      outl(0x80000001, ALI_REG(codec, ALI_GLOBAL_CONTROL));
      outl(0x00000000, ALI_REG(codec, ALI_AINTEN));
      outl(0xffffffff, ALI_REG(codec, ALI_AINT));
      outl(0x00000000, ALI_REG(codec, ALI_VOLUME));
      outb(0x10,   ALI_REG(codec, ALI_MPUR2));

      codec->ac97_ext_id = snd_ali_codec_peek(codec, 0, AC97_EXTENDED_ID);
      codec->ac97_ext_status = snd_ali_codec_peek(codec, 0,
                                        AC97_EXTENDED_STATUS);
      if (codec->spdif_support) {
            snd_ali_enable_spdif_out(codec);
            codec->spdif_mask = 0x00000002;
      }

      codec->num_of_codecs = 1;

      /* secondary codec - modem */
      if (inl(ALI_REG(codec, ALI_SCTRL)) & ALI_SCTRL_CODEC2_READY) {
            codec->num_of_codecs++;
            outl(inl(ALI_REG(codec, ALI_SCTRL)) |
                 (ALI_SCTRL_LINE_IN2 | ALI_SCTRL_GPIO_IN2 |
                  ALI_SCTRL_LINE_OUT_EN),
                 ALI_REG(codec, ALI_SCTRL));
      }

      snd_ali_printk("chip initialize succeed.\n");
      return 0;

}

/* proc for register dump */
static void snd_ali_proc_read(struct snd_info_entry *entry,
                        struct snd_info_buffer *buf)
{
      struct snd_ali *codec = entry->private_data;
      int i;
      for (i = 0; i < 256 ; i+= 4)
            snd_iprintf(buf, "%02x: %08x\n", i, inl(ALI_REG(codec, i)));
}

static void __devinit snd_ali_proc_init(struct snd_ali *codec)
{
      struct snd_info_entry *entry;
      if (!snd_card_proc_new(codec->card, "ali5451", &entry))
            snd_info_set_text_ops(entry, codec, snd_ali_proc_read);
}

static int __devinit snd_ali_resources(struct snd_ali *codec)
{
      int err;

      snd_ali_printk("resouces allocation ...\n");
      err = pci_request_regions(codec->pci, "ALI 5451");
      if (err < 0)
            return err;
      codec->port = pci_resource_start(codec->pci, 0);

      if (request_irq(codec->pci->irq, snd_ali_card_interrupt,
                  IRQF_SHARED, "ALI 5451", codec)) {
            snd_printk(KERN_ERR "Unable to request irq.\n");
            return -EBUSY;
      }
      codec->irq = codec->pci->irq;
      snd_ali_printk("resouces allocated.\n");
      return 0;
}
static int snd_ali_dev_free(struct snd_device *device)
{
      struct snd_ali *codec = device->device_data;
      snd_ali_free(codec);
      return 0;
}

static int __devinit snd_ali_create(struct snd_card *card,
                            struct pci_dev *pci,
                            int pcm_streams,
                            int spdif_support,
                            struct snd_ali ** r_ali)
{
      struct snd_ali *codec;
      int i, err;
      unsigned short cmdw;
      static struct snd_device_ops ops = {
            .dev_free = snd_ali_dev_free,
        };

      *r_ali = NULL;

      snd_ali_printk("creating ...\n");

      /* enable PCI device */
      err = pci_enable_device(pci);
      if (err < 0)
            return err;
      /* check, if we can restrict PCI DMA transfers to 31 bits */
      if (pci_set_dma_mask(pci, DMA_31BIT_MASK) < 0 ||
          pci_set_consistent_dma_mask(pci, DMA_31BIT_MASK) < 0) {
            snd_printk(KERN_ERR "architecture does not support "
                     "31bit PCI busmaster DMA\n");
            pci_disable_device(pci);
            return -ENXIO;
      }

      codec = kzalloc(sizeof(*codec), GFP_KERNEL);
      if (!codec) {
            pci_disable_device(pci);
            return -ENOMEM;
      }

      spin_lock_init(&codec->reg_lock);
      spin_lock_init(&codec->voice_alloc);

      codec->card = card;
      codec->pci = pci;
      codec->irq = -1;
      codec->revision = pci->revision;
      codec->spdif_support = spdif_support;

      if (pcm_streams < 1)
            pcm_streams = 1;
      if (pcm_streams > 32)
            pcm_streams = 32;
      
      pci_set_master(pci);
      pci_read_config_word(pci, PCI_COMMAND, &cmdw);
      if ((cmdw & PCI_COMMAND_IO) != PCI_COMMAND_IO) {
            cmdw |= PCI_COMMAND_IO;
            pci_write_config_word(pci, PCI_COMMAND, cmdw);
      }
      pci_set_master(pci);
      
      if (snd_ali_resources(codec)) {
            snd_ali_free(codec);
            return -EBUSY;
      }

      synchronize_irq(pci->irq);

      codec->synth.chmap = 0;
      codec->synth.chcnt = 0;
      codec->spdif_mask = 0;
      codec->synth.synthcount = 0;

      if (codec->revision == ALI_5451_V02)
            codec->chregs.regs.ac97read = ALI_AC97_WRITE;
      else
            codec->chregs.regs.ac97read = ALI_AC97_READ;
      codec->chregs.regs.ac97write = ALI_AC97_WRITE;

      codec->chregs.regs.start  = ALI_START;
      codec->chregs.regs.stop   = ALI_STOP;
      codec->chregs.regs.aint   = ALI_AINT;
      codec->chregs.regs.ainten = ALI_AINTEN;

      codec->chregs.data.start  = 0x00;
      codec->chregs.data.stop   = 0x00;
      codec->chregs.data.aint   = 0x00;
      codec->chregs.data.ainten = 0x00;

      /* M1533: southbridge */
      codec->pci_m1533 = pci_get_device(0x10b9, 0x1533, NULL);
      if (!codec->pci_m1533) {
            snd_printk(KERN_ERR "ali5451: cannot find ALi 1533 chip.\n");
            snd_ali_free(codec);
            return -ENODEV;
      }
      /* M7101: power management */
      codec->pci_m7101 = pci_get_device(0x10b9, 0x7101, NULL);
      if (!codec->pci_m7101 && codec->revision == ALI_5451_V02) {
            snd_printk(KERN_ERR "ali5451: cannot find ALi 7101 chip.\n");
            snd_ali_free(codec);
            return -ENODEV;
      }

      snd_ali_printk("snd_device_new is called.\n");
      err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, codec, &ops);
      if (err < 0) {
            snd_ali_free(codec);
            return err;
      }

      snd_card_set_dev(card, &pci->dev);

      /* initialise synth voices*/
      for (i = 0; i < ALI_CHANNELS; i++)
            codec->synth.voices[i].number = i;

      err = snd_ali_chip_init(codec);
      if (err < 0) {
            snd_printk(KERN_ERR "ali create: chip init error.\n");
            return err;
      }

#ifdef CONFIG_PM
      codec->image = kmalloc(sizeof(*codec->image), GFP_KERNEL);
      if (!codec->image)
            snd_printk(KERN_WARNING "can't allocate apm buffer\n");
#endif

      snd_ali_enable_address_interrupt(codec);
      codec->hw_initialized = 1;

      *r_ali = codec;
      snd_ali_printk("created.\n");
      return 0;
}

static int __devinit snd_ali_probe(struct pci_dev *pci,
                           const struct pci_device_id *pci_id)
{
      struct snd_card *card;
      struct snd_ali *codec;
      int err;

      snd_ali_printk("probe ...\n");

      card = snd_card_new(index, id, THIS_MODULE, 0);
      if (!card)
            return -ENOMEM;

      err = snd_ali_create(card, pci, pcm_channels, spdif, &codec);
      if (err < 0)
            goto error;
      card->private_data = codec;

      snd_ali_printk("mixer building ...\n");
      err = snd_ali_mixer(codec);
      if (err < 0)
            goto error;
      
      snd_ali_printk("pcm building ...\n");
      err = snd_ali_build_pcms(codec);
      if (err < 0)
            goto error;

      snd_ali_proc_init(codec);

      strcpy(card->driver, "ALI5451");
      strcpy(card->shortname, "ALI 5451");
      
      sprintf(card->longname, "%s at 0x%lx, irq %i",
            card->shortname, codec->port, codec->irq);

      snd_ali_printk("register card.\n");
      err = snd_card_register(card);
      if (err < 0)
            goto error;

      pci_set_drvdata(pci, card);
      return 0;

 error:
      snd_card_free(card);
      return err;
}

static void __devexit snd_ali_remove(struct pci_dev *pci)
{
      snd_card_free(pci_get_drvdata(pci));
      pci_set_drvdata(pci, NULL);
}

static struct pci_driver driver = {
      .name = "ALI 5451",
      .id_table = snd_ali_ids,
      .probe = snd_ali_probe,
      .remove = __devexit_p(snd_ali_remove),
#ifdef CONFIG_PM
      .suspend = ali_suspend,
      .resume = ali_resume,
#endif
};                                

static int __init alsa_card_ali_init(void)
{
      return pci_register_driver(&driver);
}

static void __exit alsa_card_ali_exit(void)
{
      pci_unregister_driver(&driver);
}

module_init(alsa_card_ali_init)
module_exit(alsa_card_ali_exit)

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