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emupcm.c

/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *                   Creative Labs, Inc.
 *  Routines for control of EMU10K1 chips / PCM routines
 *  Multichannel PCM support Copyright (c) Lee Revell <rlrevell@joe-job.com>
 *
 *  BUGS:
 *    --
 *
 *  TODO:
 *    --
 *
 *   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 <sound/driver.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/emu10k1.h>

static void snd_emu10k1_pcm_interrupt(struct snd_emu10k1 *emu,
                              struct snd_emu10k1_voice *voice)
{
      struct snd_emu10k1_pcm *epcm;

      if ((epcm = voice->epcm) == NULL)
            return;
      if (epcm->substream == NULL)
            return;
#if 0
      printk("IRQ: position = 0x%x, period = 0x%x, size = 0x%x\n",
                  epcm->substream->runtime->hw->pointer(emu, epcm->substream),
                  snd_pcm_lib_period_bytes(epcm->substream),
                  snd_pcm_lib_buffer_bytes(epcm->substream));
#endif
      snd_pcm_period_elapsed(epcm->substream);
}

static void snd_emu10k1_pcm_ac97adc_interrupt(struct snd_emu10k1 *emu,
                                    unsigned int status)
{
#if 0
      if (status & IPR_ADCBUFHALFFULL) {
            if (emu->pcm_capture_substream->runtime->mode == SNDRV_PCM_MODE_FRAME)
                  return;
      }
#endif
      snd_pcm_period_elapsed(emu->pcm_capture_substream);
}

static void snd_emu10k1_pcm_ac97mic_interrupt(struct snd_emu10k1 *emu,
                                    unsigned int status)
{
#if 0
      if (status & IPR_MICBUFHALFFULL) {
            if (emu->pcm_capture_mic_substream->runtime->mode == SNDRV_PCM_MODE_FRAME)
                  return;
      }
#endif
      snd_pcm_period_elapsed(emu->pcm_capture_mic_substream);
}

static void snd_emu10k1_pcm_efx_interrupt(struct snd_emu10k1 *emu,
                                unsigned int status)
{
#if 0
      if (status & IPR_EFXBUFHALFFULL) {
            if (emu->pcm_capture_efx_substream->runtime->mode == SNDRV_PCM_MODE_FRAME)
                  return;
      }
#endif
      snd_pcm_period_elapsed(emu->pcm_capture_efx_substream);
}      

static snd_pcm_uframes_t snd_emu10k1_efx_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      unsigned int ptr;

      if (!epcm->running)
            return 0;
      ptr = snd_emu10k1_ptr_read(emu, CCCA, epcm->voices[0]->number) & 0x00ffffff;
      ptr += runtime->buffer_size;
      ptr -= epcm->ccca_start_addr;
      ptr %= runtime->buffer_size;

      return ptr;
}

static int snd_emu10k1_pcm_channel_alloc(struct snd_emu10k1_pcm * epcm, int voices)
{
      int err, i;

      if (epcm->voices[1] != NULL && voices < 2) {
            snd_emu10k1_voice_free(epcm->emu, epcm->voices[1]);
            epcm->voices[1] = NULL;
      }
      for (i = 0; i < voices; i++) {
            if (epcm->voices[i] == NULL)
                  break;
      }
      if (i == voices)
            return 0; /* already allocated */

      for (i = 0; i < ARRAY_SIZE(epcm->voices); i++) {
            if (epcm->voices[i]) {
                  snd_emu10k1_voice_free(epcm->emu, epcm->voices[i]);
                  epcm->voices[i] = NULL;
            }
      }
      err = snd_emu10k1_voice_alloc(epcm->emu,
                              epcm->type == PLAYBACK_EMUVOICE ? EMU10K1_PCM : EMU10K1_EFX,
                              voices,
                              &epcm->voices[0]);
      
      if (err < 0)
            return err;
      epcm->voices[0]->epcm = epcm;
      if (voices > 1) {
            for (i = 1; i < voices; i++) {
                  epcm->voices[i] = &epcm->emu->voices[epcm->voices[0]->number + i];
                  epcm->voices[i]->epcm = epcm;
            }
      }
      if (epcm->extra == NULL) {
            err = snd_emu10k1_voice_alloc(epcm->emu,
                                    epcm->type == PLAYBACK_EMUVOICE ? EMU10K1_PCM : EMU10K1_EFX,
                                    1,
                                    &epcm->extra);
            if (err < 0) {
                  /* printk("pcm_channel_alloc: failed extra: voices=%d, frame=%d\n", voices, frame); */
                  for (i = 0; i < voices; i++) {
                        snd_emu10k1_voice_free(epcm->emu, epcm->voices[i]);
                        epcm->voices[i] = NULL;
                  }
                  return err;
            }
            epcm->extra->epcm = epcm;
            epcm->extra->interrupt = snd_emu10k1_pcm_interrupt;
      }
      return 0;
}

static unsigned int capture_period_sizes[31] = {
      384,  448,  512,  640,
      384*2,      448*2,      512*2,      640*2,
      384*4,      448*4,      512*4,      640*4,
      384*8,      448*8,      512*8,      640*8,
      384*16,     448*16,     512*16,     640*16,
      384*32,     448*32,     512*32,     640*32,
      384*64,     448*64,     512*64,     640*64,
      384*128,448*128,512*128
};

static struct snd_pcm_hw_constraint_list hw_constraints_capture_period_sizes = {
      .count = 31,
      .list = capture_period_sizes,
      .mask = 0
};

static unsigned int capture_rates[8] = {
      8000, 11025, 16000, 22050, 24000, 32000, 44100, 48000
};

static struct snd_pcm_hw_constraint_list hw_constraints_capture_rates = {
      .count = 8,
      .list = capture_rates,
      .mask = 0
};

static unsigned int snd_emu10k1_capture_rate_reg(unsigned int rate)
{
      switch (rate) {
      case 8000:  return ADCCR_SAMPLERATE_8;
      case 11025: return ADCCR_SAMPLERATE_11;
      case 16000: return ADCCR_SAMPLERATE_16;
      case 22050: return ADCCR_SAMPLERATE_22;
      case 24000: return ADCCR_SAMPLERATE_24;
      case 32000: return ADCCR_SAMPLERATE_32;
      case 44100: return ADCCR_SAMPLERATE_44;
      case 48000: return ADCCR_SAMPLERATE_48;
      default:
                  snd_BUG();
                  return ADCCR_SAMPLERATE_8;
      }
}

static unsigned int snd_emu10k1_audigy_capture_rate_reg(unsigned int rate)
{
      switch (rate) {
      case 8000:  return A_ADCCR_SAMPLERATE_8;
      case 11025: return A_ADCCR_SAMPLERATE_11;
      case 12000: return A_ADCCR_SAMPLERATE_12; /* really supported? */
      case 16000: return ADCCR_SAMPLERATE_16;
      case 22050: return ADCCR_SAMPLERATE_22;
      case 24000: return ADCCR_SAMPLERATE_24;
      case 32000: return ADCCR_SAMPLERATE_32;
      case 44100: return ADCCR_SAMPLERATE_44;
      case 48000: return ADCCR_SAMPLERATE_48;
      default:
                  snd_BUG();
                  return A_ADCCR_SAMPLERATE_8;
      }
}

static unsigned int emu10k1_calc_pitch_target(unsigned int rate)
{
      unsigned int pitch_target;

      pitch_target = (rate << 8) / 375;
      pitch_target = (pitch_target >> 1) + (pitch_target & 1);
      return pitch_target;
}

#define PITCH_48000 0x00004000
#define PITCH_96000 0x00008000
#define PITCH_85000 0x00007155
#define PITCH_80726 0x00006ba2
#define PITCH_67882 0x00005a82
#define PITCH_57081 0x00004c1c

static unsigned int emu10k1_select_interprom(unsigned int pitch_target)
{
      if (pitch_target == PITCH_48000)
            return CCCA_INTERPROM_0;
      else if (pitch_target < PITCH_48000)
            return CCCA_INTERPROM_1;
      else if (pitch_target >= PITCH_96000)
            return CCCA_INTERPROM_0;
      else if (pitch_target >= PITCH_85000)
            return CCCA_INTERPROM_6;
      else if (pitch_target >= PITCH_80726)
            return CCCA_INTERPROM_5;
      else if (pitch_target >= PITCH_67882)
            return CCCA_INTERPROM_4;
      else if (pitch_target >= PITCH_57081)
            return CCCA_INTERPROM_3;
      else  
            return CCCA_INTERPROM_2;
}

/*
 * calculate cache invalidate size 
 *
 * stereo: channel is stereo
 * w_16: using 16bit samples
 *
 * returns: cache invalidate size in samples
 */
static inline int emu10k1_ccis(int stereo, int w_16)
{
      if (w_16) {
            return stereo ? 24 : 26;
      } else {
            return stereo ? 24*2 : 26*2;
      }
}

static void snd_emu10k1_pcm_init_voice(struct snd_emu10k1 *emu,
                               int master, int extra,
                               struct snd_emu10k1_voice *evoice,
                               unsigned int start_addr,
                               unsigned int end_addr,
                               struct snd_emu10k1_pcm_mixer *mix)
{
      struct snd_pcm_substream *substream = evoice->epcm->substream;
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned int silent_page, tmp;
      int voice, stereo, w_16;
      unsigned char attn, send_amount[8];
      unsigned char send_routing[8];
      unsigned long flags;
      unsigned int pitch_target;
      unsigned int ccis;

      voice = evoice->number;
      stereo = runtime->channels == 2;
      w_16 = snd_pcm_format_width(runtime->format) == 16;

      if (!extra && stereo) {
            start_addr >>= 1;
            end_addr >>= 1;
      }
      if (w_16) {
            start_addr >>= 1;
            end_addr >>= 1;
      }

      spin_lock_irqsave(&emu->reg_lock, flags);

      /* volume parameters */
      if (extra) {
            attn = 0;
            memset(send_routing, 0, sizeof(send_routing));
            send_routing[0] = 0;
            send_routing[1] = 1;
            send_routing[2] = 2;
            send_routing[3] = 3;
            memset(send_amount, 0, sizeof(send_amount));
      } else {
            /* mono, left, right (master voice = left) */
            tmp = stereo ? (master ? 1 : 2) : 0;
            memcpy(send_routing, &mix->send_routing[tmp][0], 8);
            memcpy(send_amount, &mix->send_volume[tmp][0], 8);
      }

      ccis = emu10k1_ccis(stereo, w_16);
      
      if (master) {
            evoice->epcm->ccca_start_addr = start_addr + ccis;
            if (extra) {
                  start_addr += ccis;
                  end_addr += ccis;
            }
            if (stereo && !extra) {
                  snd_emu10k1_ptr_write(emu, CPF, voice, CPF_STEREO_MASK);
                  snd_emu10k1_ptr_write(emu, CPF, (voice + 1), CPF_STEREO_MASK);
            } else {
                  snd_emu10k1_ptr_write(emu, CPF, voice, 0);
            }
      }

      /* setup routing */
      if (emu->audigy) {
            snd_emu10k1_ptr_write(emu, A_FXRT1, voice,
                              snd_emu10k1_compose_audigy_fxrt1(send_routing));
            snd_emu10k1_ptr_write(emu, A_FXRT2, voice,
                              snd_emu10k1_compose_audigy_fxrt2(send_routing));
            snd_emu10k1_ptr_write(emu, A_SENDAMOUNTS, voice,
                              ((unsigned int)send_amount[4] << 24) |
                              ((unsigned int)send_amount[5] << 16) |
                              ((unsigned int)send_amount[6] << 8) |
                              (unsigned int)send_amount[7]);
      } else
            snd_emu10k1_ptr_write(emu, FXRT, voice,
                              snd_emu10k1_compose_send_routing(send_routing));
      /* Stop CA */
      /* Assumption that PT is already 0 so no harm overwriting */
      snd_emu10k1_ptr_write(emu, PTRX, voice, (send_amount[0] << 8) | send_amount[1]);
      snd_emu10k1_ptr_write(emu, DSL, voice, end_addr | (send_amount[3] << 24));
      snd_emu10k1_ptr_write(emu, PSST, voice, start_addr | (send_amount[2] << 24));
      if (emu->card_capabilities->emu1010)
            pitch_target = PITCH_48000; /* Disable interpolators on emu1010 card */
      else 
            pitch_target = emu10k1_calc_pitch_target(runtime->rate);
      if (extra)
            snd_emu10k1_ptr_write(emu, CCCA, voice, start_addr |
                        emu10k1_select_interprom(pitch_target) |
                        (w_16 ? 0 : CCCA_8BITSELECT));
      else
            snd_emu10k1_ptr_write(emu, CCCA, voice, (start_addr + ccis) |
                        emu10k1_select_interprom(pitch_target) |
                        (w_16 ? 0 : CCCA_8BITSELECT));
      /* Clear filter delay memory */
      snd_emu10k1_ptr_write(emu, Z1, voice, 0);
      snd_emu10k1_ptr_write(emu, Z2, voice, 0);
      /* invalidate maps */
      silent_page = ((unsigned int)emu->silent_page.addr << 1) | MAP_PTI_MASK;
      snd_emu10k1_ptr_write(emu, MAPA, voice, silent_page);
      snd_emu10k1_ptr_write(emu, MAPB, voice, silent_page);
      /* modulation envelope */
      snd_emu10k1_ptr_write(emu, CVCF, voice, 0xffff);
      snd_emu10k1_ptr_write(emu, VTFT, voice, 0xffff);
      snd_emu10k1_ptr_write(emu, ATKHLDM, voice, 0);
      snd_emu10k1_ptr_write(emu, DCYSUSM, voice, 0x007f);
      snd_emu10k1_ptr_write(emu, LFOVAL1, voice, 0x8000);
      snd_emu10k1_ptr_write(emu, LFOVAL2, voice, 0x8000);
      snd_emu10k1_ptr_write(emu, FMMOD, voice, 0);
      snd_emu10k1_ptr_write(emu, TREMFRQ, voice, 0);
      snd_emu10k1_ptr_write(emu, FM2FRQ2, voice, 0);
      snd_emu10k1_ptr_write(emu, ENVVAL, voice, 0x8000);
      /* volume envelope */
      snd_emu10k1_ptr_write(emu, ATKHLDV, voice, 0x7f7f);
      snd_emu10k1_ptr_write(emu, ENVVOL, voice, 0x0000);
      /* filter envelope */
      snd_emu10k1_ptr_write(emu, PEFE_FILTERAMOUNT, voice, 0x7f);
      /* pitch envelope */
      snd_emu10k1_ptr_write(emu, PEFE_PITCHAMOUNT, voice, 0);

      spin_unlock_irqrestore(&emu->reg_lock, flags);
}

static int snd_emu10k1_playback_hw_params(struct snd_pcm_substream *substream,
                                struct snd_pcm_hw_params *hw_params)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      int err;

      if ((err = snd_emu10k1_pcm_channel_alloc(epcm, params_channels(hw_params))) < 0)
            return err;
      if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
            return err;
      if (err > 0) {    /* change */
            int mapped;
            if (epcm->memblk != NULL)
                  snd_emu10k1_free_pages(emu, epcm->memblk);
            epcm->memblk = snd_emu10k1_alloc_pages(emu, substream);
            epcm->start_addr = 0;
            if (! epcm->memblk)
                  return -ENOMEM;
            mapped = ((struct snd_emu10k1_memblk *)epcm->memblk)->mapped_page;
            if (mapped < 0)
                  return -ENOMEM;
            epcm->start_addr = mapped << PAGE_SHIFT;
      }
      return 0;
}

static int snd_emu10k1_playback_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm;

      if (runtime->private_data == NULL)
            return 0;
      epcm = runtime->private_data;
      if (epcm->extra) {
            snd_emu10k1_voice_free(epcm->emu, epcm->extra);
            epcm->extra = NULL;
      }
      if (epcm->voices[1]) {
            snd_emu10k1_voice_free(epcm->emu, epcm->voices[1]);
            epcm->voices[1] = NULL;
      }
      if (epcm->voices[0]) {
            snd_emu10k1_voice_free(epcm->emu, epcm->voices[0]);
            epcm->voices[0] = NULL;
      }
      if (epcm->memblk) {
            snd_emu10k1_free_pages(emu, epcm->memblk);
            epcm->memblk = NULL;
            epcm->start_addr = 0;
      }
      snd_pcm_lib_free_pages(substream);
      return 0;
}

static int snd_emu10k1_efx_playback_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm;
      int i;

      if (runtime->private_data == NULL)
            return 0;
      epcm = runtime->private_data;
      if (epcm->extra) {
            snd_emu10k1_voice_free(epcm->emu, epcm->extra);
            epcm->extra = NULL;
      }
      for (i = 0; i < NUM_EFX_PLAYBACK; i++) {
            if (epcm->voices[i]) {
                  snd_emu10k1_voice_free(epcm->emu, epcm->voices[i]);
                  epcm->voices[i] = NULL;
            }
      }
      if (epcm->memblk) {
            snd_emu10k1_free_pages(emu, epcm->memblk);
            epcm->memblk = NULL;
            epcm->start_addr = 0;
      }
      snd_pcm_lib_free_pages(substream);
      return 0;
}

static int snd_emu10k1_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      unsigned int start_addr, end_addr;

      start_addr = epcm->start_addr;
      end_addr = snd_pcm_lib_period_bytes(substream);
      if (runtime->channels == 2) {
            start_addr >>= 1;
            end_addr >>= 1;
      }
      end_addr += start_addr;
      snd_emu10k1_pcm_init_voice(emu, 1, 1, epcm->extra,
                           start_addr, end_addr, NULL);
      start_addr = epcm->start_addr;
      end_addr = epcm->start_addr + snd_pcm_lib_buffer_bytes(substream);
      snd_emu10k1_pcm_init_voice(emu, 1, 0, epcm->voices[0],
                           start_addr, end_addr,
                           &emu->pcm_mixer[substream->number]);
      if (epcm->voices[1])
            snd_emu10k1_pcm_init_voice(emu, 0, 0, epcm->voices[1],
                                 start_addr, end_addr,
                                 &emu->pcm_mixer[substream->number]);
      return 0;
}

static int snd_emu10k1_efx_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      unsigned int start_addr, end_addr;
      unsigned int channel_size;
      int i;

      start_addr = epcm->start_addr;
      end_addr = epcm->start_addr + snd_pcm_lib_buffer_bytes(substream);

      /*
       * the kX driver leaves some space between voices
       */
      channel_size = ( end_addr - start_addr ) / NUM_EFX_PLAYBACK;

      snd_emu10k1_pcm_init_voice(emu, 1, 1, epcm->extra,
                           start_addr, start_addr + (channel_size / 2), NULL);

      /* only difference with the master voice is we use it for the pointer */
      snd_emu10k1_pcm_init_voice(emu, 1, 0, epcm->voices[0],
                           start_addr, start_addr + channel_size,
                           &emu->efx_pcm_mixer[0]);

      start_addr += channel_size;
      for (i = 1; i < NUM_EFX_PLAYBACK; i++) {
            snd_emu10k1_pcm_init_voice(emu, 0, 0, epcm->voices[i],
                                 start_addr, start_addr + channel_size,
                                 &emu->efx_pcm_mixer[i]);
            start_addr += channel_size;
      }

      return 0;
}

static struct snd_pcm_hardware snd_emu10k1_efx_playback =
{
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_NONINTERLEAVED |
                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
                         SNDRV_PCM_INFO_RESUME |
                         SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
      .formats =        SNDRV_PCM_FMTBIT_S16_LE,
      .rates =          SNDRV_PCM_RATE_48000,
      .rate_min =       48000,
      .rate_max =       48000,
      .channels_min =         NUM_EFX_PLAYBACK,
      .channels_max =         NUM_EFX_PLAYBACK,
      .buffer_bytes_max =     (64*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (64*1024),
      .periods_min =          2,
      .periods_max =          2,
      .fifo_size =            0,
};

static int snd_emu10k1_capture_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_emu10k1_capture_hw_free(struct snd_pcm_substream *substream)
{
      return snd_pcm_lib_free_pages(substream);
}

static int snd_emu10k1_capture_prepare(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      int idx;

      /* zeroing the buffer size will stop capture */
      snd_emu10k1_ptr_write(emu, epcm->capture_bs_reg, 0, 0);
      switch (epcm->type) {
      case CAPTURE_AC97ADC:
            snd_emu10k1_ptr_write(emu, ADCCR, 0, 0);
            break;
      case CAPTURE_EFX:
            if (emu->audigy) {
                  snd_emu10k1_ptr_write(emu, A_FXWC1, 0, 0);
                  snd_emu10k1_ptr_write(emu, A_FXWC2, 0, 0);
            } else
                  snd_emu10k1_ptr_write(emu, FXWC, 0, 0);
            break;
      default:
            break;
      }     
      snd_emu10k1_ptr_write(emu, epcm->capture_ba_reg, 0, runtime->dma_addr);
      epcm->capture_bufsize = snd_pcm_lib_buffer_bytes(substream);
      epcm->capture_bs_val = 0;
      for (idx = 0; idx < 31; idx++) {
            if (capture_period_sizes[idx] == epcm->capture_bufsize) {
                  epcm->capture_bs_val = idx + 1;
                  break;
            }
      }
      if (epcm->capture_bs_val == 0) {
            snd_BUG();
            epcm->capture_bs_val++;
      }
      if (epcm->type == CAPTURE_AC97ADC) {
            epcm->capture_cr_val = emu->audigy ? A_ADCCR_LCHANENABLE : ADCCR_LCHANENABLE;
            if (runtime->channels > 1)
                  epcm->capture_cr_val |= emu->audigy ? A_ADCCR_RCHANENABLE : ADCCR_RCHANENABLE;
            epcm->capture_cr_val |= emu->audigy ?
                  snd_emu10k1_audigy_capture_rate_reg(runtime->rate) :
                  snd_emu10k1_capture_rate_reg(runtime->rate);
      }
      return 0;
}

static void snd_emu10k1_playback_invalidate_cache(struct snd_emu10k1 *emu, int extra, struct snd_emu10k1_voice *evoice)
{
      struct snd_pcm_runtime *runtime;
      unsigned int voice, stereo, i, ccis, cra = 64, cs, sample;

      if (evoice == NULL)
            return;
      runtime = evoice->epcm->substream->runtime;
      voice = evoice->number;
      stereo = (!extra && runtime->channels == 2);
      sample = snd_pcm_format_width(runtime->format) == 16 ? 0 : 0x80808080;
      ccis = emu10k1_ccis(stereo, sample == 0);
      /* set cs to 2 * number of cache registers beside the invalidated */
      cs = (sample == 0) ? (32-ccis) : (64-ccis+1) >> 1;
      if (cs > 16) cs = 16;
      for (i = 0; i < cs; i++) {
            snd_emu10k1_ptr_write(emu, CD0 + i, voice, sample);
            if (stereo) {
                  snd_emu10k1_ptr_write(emu, CD0 + i, voice + 1, sample);
            }
      }
      /* reset cache */
      snd_emu10k1_ptr_write(emu, CCR_CACHEINVALIDSIZE, voice, 0);
      snd_emu10k1_ptr_write(emu, CCR_READADDRESS, voice, cra);
      if (stereo) {
            snd_emu10k1_ptr_write(emu, CCR_CACHEINVALIDSIZE, voice + 1, 0);
            snd_emu10k1_ptr_write(emu, CCR_READADDRESS, voice + 1, cra);
      }
      /* fill cache */
      snd_emu10k1_ptr_write(emu, CCR_CACHEINVALIDSIZE, voice, ccis);
      if (stereo) {
            snd_emu10k1_ptr_write(emu, CCR_CACHEINVALIDSIZE, voice+1, ccis);
      }
}

static void snd_emu10k1_playback_prepare_voice(struct snd_emu10k1 *emu, struct snd_emu10k1_voice *evoice,
                                     int master, int extra,
                                     struct snd_emu10k1_pcm_mixer *mix)
{
      struct snd_pcm_substream *substream;
      struct snd_pcm_runtime *runtime;
      unsigned int attn, vattn;
      unsigned int voice, tmp;

      if (evoice == NULL)     /* skip second voice for mono */
            return;
      substream = evoice->epcm->substream;
      runtime = substream->runtime;
      voice = evoice->number;

      attn = extra ? 0 : 0x00ff;
      tmp = runtime->channels == 2 ? (master ? 1 : 2) : 0;
      vattn = mix != NULL ? (mix->attn[tmp] << 16) : 0;
      snd_emu10k1_ptr_write(emu, IFATN, voice, attn);
      snd_emu10k1_ptr_write(emu, VTFT, voice, vattn | 0xffff);
      snd_emu10k1_ptr_write(emu, CVCF, voice, vattn | 0xffff);
      snd_emu10k1_ptr_write(emu, DCYSUSV, voice, 0x7f7f);
      snd_emu10k1_voice_clear_loop_stop(emu, voice);
}     

static void snd_emu10k1_playback_trigger_voice(struct snd_emu10k1 *emu, struct snd_emu10k1_voice *evoice, int master, int extra)
{
      struct snd_pcm_substream *substream;
      struct snd_pcm_runtime *runtime;
      unsigned int voice, pitch, pitch_target;

      if (evoice == NULL)     /* skip second voice for mono */
            return;
      substream = evoice->epcm->substream;
      runtime = substream->runtime;
      voice = evoice->number;

      pitch = snd_emu10k1_rate_to_pitch(runtime->rate) >> 8;
      if (emu->card_capabilities->emu1010)
            pitch_target = PITCH_48000; /* Disable interpolators on emu1010 card */
      else 
            pitch_target = emu10k1_calc_pitch_target(runtime->rate);
      snd_emu10k1_ptr_write(emu, PTRX_PITCHTARGET, voice, pitch_target);
      if (master || evoice->epcm->type == PLAYBACK_EFX)
            snd_emu10k1_ptr_write(emu, CPF_CURRENTPITCH, voice, pitch_target);
      snd_emu10k1_ptr_write(emu, IP, voice, pitch);
      if (extra)
            snd_emu10k1_voice_intr_enable(emu, voice);
}

static void snd_emu10k1_playback_stop_voice(struct snd_emu10k1 *emu, struct snd_emu10k1_voice *evoice)
{
      unsigned int voice;

      if (evoice == NULL)
            return;
      voice = evoice->number;
      snd_emu10k1_voice_intr_disable(emu, voice);
      snd_emu10k1_ptr_write(emu, PTRX_PITCHTARGET, voice, 0);
      snd_emu10k1_ptr_write(emu, CPF_CURRENTPITCH, voice, 0);
      snd_emu10k1_ptr_write(emu, IFATN, voice, 0xffff);
      snd_emu10k1_ptr_write(emu, VTFT, voice, 0xffff);
      snd_emu10k1_ptr_write(emu, CVCF, voice, 0xffff);
      snd_emu10k1_ptr_write(emu, IP, voice, 0);
}

static int snd_emu10k1_playback_trigger(struct snd_pcm_substream *substream,
                                int cmd)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      struct snd_emu10k1_pcm_mixer *mix;
      int result = 0;

      /* printk("trigger - emu10k1 = 0x%x, cmd = %i, pointer = %i\n", (int)emu, cmd, substream->ops->pointer(substream)); */
      spin_lock(&emu->reg_lock);
      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
            snd_emu10k1_playback_invalidate_cache(emu, 1, epcm->extra); /* do we need this? */
            snd_emu10k1_playback_invalidate_cache(emu, 0, epcm->voices[0]);
            /* follow thru */
      case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
      case SNDRV_PCM_TRIGGER_RESUME:
            mix = &emu->pcm_mixer[substream->number];
            snd_emu10k1_playback_prepare_voice(emu, epcm->voices[0], 1, 0, mix);
            snd_emu10k1_playback_prepare_voice(emu, epcm->voices[1], 0, 0, mix);
            snd_emu10k1_playback_prepare_voice(emu, epcm->extra, 1, 1, NULL);
            snd_emu10k1_playback_trigger_voice(emu, epcm->voices[0], 1, 0);
            snd_emu10k1_playback_trigger_voice(emu, epcm->voices[1], 0, 0);
            snd_emu10k1_playback_trigger_voice(emu, epcm->extra, 1, 1);
            epcm->running = 1;
            break;
      case SNDRV_PCM_TRIGGER_STOP:
      case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
      case SNDRV_PCM_TRIGGER_SUSPEND:
            epcm->running = 0;
            snd_emu10k1_playback_stop_voice(emu, epcm->voices[0]);
            snd_emu10k1_playback_stop_voice(emu, epcm->voices[1]);
            snd_emu10k1_playback_stop_voice(emu, epcm->extra);
            break;
      default:
            result = -EINVAL;
            break;
      }
      spin_unlock(&emu->reg_lock);
      return result;
}

static int snd_emu10k1_capture_trigger(struct snd_pcm_substream *substream,
                               int cmd)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      int result = 0;

      spin_lock(&emu->reg_lock);
      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
      case SNDRV_PCM_TRIGGER_RESUME:
            /* hmm this should cause full and half full interrupt to be raised? */
            outl(epcm->capture_ipr, emu->port + IPR);
            snd_emu10k1_intr_enable(emu, epcm->capture_inte);
            /* printk("adccr = 0x%x, adcbs = 0x%x\n", epcm->adccr, epcm->adcbs); */
            switch (epcm->type) {
            case CAPTURE_AC97ADC:
                  snd_emu10k1_ptr_write(emu, ADCCR, 0, epcm->capture_cr_val);
                  break;
            case CAPTURE_EFX:
                  if (emu->audigy) {
                        snd_emu10k1_ptr_write(emu, A_FXWC1, 0, epcm->capture_cr_val);
                        snd_emu10k1_ptr_write(emu, A_FXWC2, 0, epcm->capture_cr_val2);
                        snd_printdd("cr_val=0x%x, cr_val2=0x%x\n", epcm->capture_cr_val, epcm->capture_cr_val2);
                  } else
                        snd_emu10k1_ptr_write(emu, FXWC, 0, epcm->capture_cr_val);
                  break;
            default:    
                  break;
            }
            snd_emu10k1_ptr_write(emu, epcm->capture_bs_reg, 0, epcm->capture_bs_val);
            epcm->running = 1;
            epcm->first_ptr = 1;
            break;
      case SNDRV_PCM_TRIGGER_STOP:
      case SNDRV_PCM_TRIGGER_SUSPEND:
            epcm->running = 0;
            snd_emu10k1_intr_disable(emu, epcm->capture_inte);
            outl(epcm->capture_ipr, emu->port + IPR);
            snd_emu10k1_ptr_write(emu, epcm->capture_bs_reg, 0, 0);
            switch (epcm->type) {
            case CAPTURE_AC97ADC:
                  snd_emu10k1_ptr_write(emu, ADCCR, 0, 0);
                  break;
            case CAPTURE_EFX:
                  if (emu->audigy) {
                        snd_emu10k1_ptr_write(emu, A_FXWC1, 0, 0);
                        snd_emu10k1_ptr_write(emu, A_FXWC2, 0, 0);
                  } else
                        snd_emu10k1_ptr_write(emu, FXWC, 0, 0);
                  break;
            default:
                  break;
            }
            break;
      default:
            result = -EINVAL;
      }
      spin_unlock(&emu->reg_lock);
      return result;
}

static snd_pcm_uframes_t snd_emu10k1_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      unsigned int ptr;

      if (!epcm->running)
            return 0;
      ptr = snd_emu10k1_ptr_read(emu, CCCA, epcm->voices[0]->number) & 0x00ffffff;
#if 0 /* Perex's code */
      ptr += runtime->buffer_size;
      ptr -= epcm->ccca_start_addr;
      ptr %= runtime->buffer_size;
#else /* EMU10K1 Open Source code from Creative */
      if (ptr < epcm->ccca_start_addr)
            ptr += runtime->buffer_size - epcm->ccca_start_addr;
      else {
            ptr -= epcm->ccca_start_addr;
            if (ptr >= runtime->buffer_size)
                  ptr -= runtime->buffer_size;
      }
#endif
      /* printk("ptr = 0x%x, buffer_size = 0x%x, period_size = 0x%x\n", ptr, runtime->buffer_size, runtime->period_size); */
      return ptr;
}


static int snd_emu10k1_efx_playback_trigger(struct snd_pcm_substream *substream,
                                int cmd)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      int i;
      int result = 0;

      spin_lock(&emu->reg_lock);
      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
            /* prepare voices */
            for (i = 0; i < NUM_EFX_PLAYBACK; i++) {  
                  snd_emu10k1_playback_invalidate_cache(emu, 0, epcm->voices[i]);
            }
            snd_emu10k1_playback_invalidate_cache(emu, 1, epcm->extra);

            /* follow thru */
      case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
      case SNDRV_PCM_TRIGGER_RESUME:
            snd_emu10k1_playback_prepare_voice(emu, epcm->extra, 1, 1, NULL);
            snd_emu10k1_playback_prepare_voice(emu, epcm->voices[0], 0, 0,
                                       &emu->efx_pcm_mixer[0]);
            for (i = 1; i < NUM_EFX_PLAYBACK; i++)
                  snd_emu10k1_playback_prepare_voice(emu, epcm->voices[i], 0, 0,
                                             &emu->efx_pcm_mixer[i]);
            snd_emu10k1_playback_trigger_voice(emu, epcm->voices[0], 0, 0);
            snd_emu10k1_playback_trigger_voice(emu, epcm->extra, 1, 1);
            for (i = 1; i < NUM_EFX_PLAYBACK; i++)
                  snd_emu10k1_playback_trigger_voice(emu, epcm->voices[i], 0, 0);
            epcm->running = 1;
            break;
      case SNDRV_PCM_TRIGGER_SUSPEND:
      case SNDRV_PCM_TRIGGER_STOP:
      case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
            epcm->running = 0;
            for (i = 0; i < NUM_EFX_PLAYBACK; i++) {  
                  snd_emu10k1_playback_stop_voice(emu, epcm->voices[i]);
            }
            snd_emu10k1_playback_stop_voice(emu, epcm->extra);
            break;
      default:
            result = -EINVAL;
            break;
      }
      spin_unlock(&emu->reg_lock);
      return result;
}


static snd_pcm_uframes_t snd_emu10k1_capture_pointer(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm = runtime->private_data;
      unsigned int ptr;

      if (!epcm->running)
            return 0;
      if (epcm->first_ptr) {
            udelay(50); /* hack, it takes awhile until capture is started */
            epcm->first_ptr = 0;
      }
      ptr = snd_emu10k1_ptr_read(emu, epcm->capture_idx_reg, 0) & 0x0000ffff;
      return bytes_to_frames(runtime, ptr);
}

/*
 *  Playback support device description
 */

static struct snd_pcm_hardware snd_emu10k1_playback =
{
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
                         SNDRV_PCM_INFO_RESUME |
                         SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
      .formats =        SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
      .rates =          SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_96000,
      .rate_min =       4000,
      .rate_max =       96000,
      .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,
};

/*
 *  Capture support device description
 */

static struct snd_pcm_hardware snd_emu10k1_capture =
{
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
                         SNDRV_PCM_INFO_RESUME |
                         SNDRV_PCM_INFO_MMAP_VALID),
      .formats =        SNDRV_PCM_FMTBIT_S16_LE,
      .rates =          SNDRV_PCM_RATE_8000_48000,
      .rate_min =       8000,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (64*1024),
      .period_bytes_min =     384,
      .period_bytes_max =     (64*1024),
      .periods_min =          2,
      .periods_max =          2,
      .fifo_size =            0,
};

static struct snd_pcm_hardware snd_emu10k1_capture_efx =
{
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
                         SNDRV_PCM_INFO_RESUME |
                         SNDRV_PCM_INFO_MMAP_VALID),
      .formats =        SNDRV_PCM_FMTBIT_S16_LE,
      .rates =          SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | 
                         SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | 
                         SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000,
      .rate_min =       44100,
      .rate_max =       192000,
      .channels_min =         8,
      .channels_max =         8,
      .buffer_bytes_max =     (64*1024),
      .period_bytes_min =     384,
      .period_bytes_max =     (64*1024),
      .periods_min =          2,
      .periods_max =          2,
      .fifo_size =            0,
};

/*
 *
 */

static void snd_emu10k1_pcm_mixer_notify1(struct snd_emu10k1 *emu, struct snd_kcontrol *kctl, int idx, int activate)
{
      struct snd_ctl_elem_id id;

      if (! kctl)
            return;
      if (activate)
            kctl->vd[idx].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
      else
            kctl->vd[idx].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
      snd_ctl_notify(emu->card, SNDRV_CTL_EVENT_MASK_VALUE |
                   SNDRV_CTL_EVENT_MASK_INFO,
                   snd_ctl_build_ioff(&id, kctl, idx));
}

static void snd_emu10k1_pcm_mixer_notify(struct snd_emu10k1 *emu, int idx, int activate)
{
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_send_routing, idx, activate);
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_send_volume, idx, activate);
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_attn, idx, activate);
}

static void snd_emu10k1_pcm_efx_mixer_notify(struct snd_emu10k1 *emu, int idx, int activate)
{
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_efx_send_routing, idx, activate);
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_efx_send_volume, idx, activate);
      snd_emu10k1_pcm_mixer_notify1(emu, emu->ctl_efx_attn, idx, activate);
}

static void snd_emu10k1_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
      kfree(runtime->private_data);
}

static int snd_emu10k1_efx_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm_mixer *mix;
      int i;

      for (i = 0; i < NUM_EFX_PLAYBACK; i++) {
            mix = &emu->efx_pcm_mixer[i];
            mix->epcm = NULL;
            snd_emu10k1_pcm_efx_mixer_notify(emu, i, 0);
      }
      return 0;
}

static int snd_emu10k1_efx_playback_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm *epcm;
      struct snd_emu10k1_pcm_mixer *mix;
      struct snd_pcm_runtime *runtime = substream->runtime;
      int i;

      epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
      if (epcm == NULL)
            return -ENOMEM;
      epcm->emu = emu;
      epcm->type = PLAYBACK_EFX;
      epcm->substream = substream;
      
      emu->pcm_playback_efx_substream = substream;

      runtime->private_data = epcm;
      runtime->private_free = snd_emu10k1_pcm_free_substream;
      runtime->hw = snd_emu10k1_efx_playback;
      
      for (i = 0; i < NUM_EFX_PLAYBACK; i++) {
            mix = &emu->efx_pcm_mixer[i];
            mix->send_routing[0][0] = i;
            memset(&mix->send_volume, 0, sizeof(mix->send_volume));
            mix->send_volume[0][0] = 255;
            mix->attn[0] = 0xffff;
            mix->epcm = epcm;
            snd_emu10k1_pcm_efx_mixer_notify(emu, i, 1);
      }
      return 0;
}

static int snd_emu10k1_playback_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm *epcm;
      struct snd_emu10k1_pcm_mixer *mix;
      struct snd_pcm_runtime *runtime = substream->runtime;
      int i, err;

      epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
      if (epcm == NULL)
            return -ENOMEM;
      epcm->emu = emu;
      epcm->type = PLAYBACK_EMUVOICE;
      epcm->substream = substream;
      runtime->private_data = epcm;
      runtime->private_free = snd_emu10k1_pcm_free_substream;
      runtime->hw = snd_emu10k1_playback;
      if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) {
            kfree(epcm);
            return err;
      }
      if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) {
            kfree(epcm);
            return err;
      }
      mix = &emu->pcm_mixer[substream->number];
      for (i = 0; i < 4; i++)
            mix->send_routing[0][i] = mix->send_routing[1][i] = mix->send_routing[2][i] = i;
      memset(&mix->send_volume, 0, sizeof(mix->send_volume));
      mix->send_volume[0][0] = mix->send_volume[0][1] =
      mix->send_volume[1][0] = mix->send_volume[2][1] = 255;
      mix->attn[0] = mix->attn[1] = mix->attn[2] = 0xffff;
      mix->epcm = epcm;
      snd_emu10k1_pcm_mixer_notify(emu, substream->number, 1);
      return 0;
}

static int snd_emu10k1_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm_mixer *mix = &emu->pcm_mixer[substream->number];

      mix->epcm = NULL;
      snd_emu10k1_pcm_mixer_notify(emu, substream->number, 0);
      return 0;
}

static int snd_emu10k1_capture_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_pcm *epcm;

      epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
      if (epcm == NULL)
            return -ENOMEM;
      epcm->emu = emu;
      epcm->type = CAPTURE_AC97ADC;
      epcm->substream = substream;
      epcm->capture_ipr = IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL;
      epcm->capture_inte = INTE_ADCBUFENABLE;
      epcm->capture_ba_reg = ADCBA;
      epcm->capture_bs_reg = ADCBS;
      epcm->capture_idx_reg = emu->audigy ? A_ADCIDX : ADCIDX;
      runtime->private_data = epcm;
      runtime->private_free = snd_emu10k1_pcm_free_substream;
      runtime->hw = snd_emu10k1_capture;
      emu->capture_interrupt = snd_emu10k1_pcm_ac97adc_interrupt;
      emu->pcm_capture_substream = substream;
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_capture_rates);
      return 0;
}

static int snd_emu10k1_capture_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);

      emu->capture_interrupt = NULL;
      emu->pcm_capture_substream = NULL;
      return 0;
}

static int snd_emu10k1_capture_mic_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm *epcm;
      struct snd_pcm_runtime *runtime = substream->runtime;

      epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
      if (epcm == NULL)
            return -ENOMEM;
      epcm->emu = emu;
      epcm->type = CAPTURE_AC97MIC;
      epcm->substream = substream;
      epcm->capture_ipr = IPR_MICBUFFULL|IPR_MICBUFHALFFULL;
      epcm->capture_inte = INTE_MICBUFENABLE;
      epcm->capture_ba_reg = MICBA;
      epcm->capture_bs_reg = MICBS;
      epcm->capture_idx_reg = emu->audigy ? A_MICIDX : MICIDX;
      substream->runtime->private_data = epcm;
      substream->runtime->private_free = snd_emu10k1_pcm_free_substream;
      runtime->hw = snd_emu10k1_capture;
      runtime->hw.rates = SNDRV_PCM_RATE_8000;
      runtime->hw.rate_min = runtime->hw.rate_max = 8000;
      runtime->hw.channels_min = 1;
      emu->capture_mic_interrupt = snd_emu10k1_pcm_ac97mic_interrupt;
      emu->pcm_capture_mic_substream = substream;
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
      return 0;
}

static int snd_emu10k1_capture_mic_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);

      emu->capture_interrupt = NULL;
      emu->pcm_capture_mic_substream = NULL;
      return 0;
}

static int snd_emu10k1_capture_efx_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_pcm *epcm;
      struct snd_pcm_runtime *runtime = substream->runtime;
      int nefx = emu->audigy ? 64 : 32;
      int idx;

      epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
      if (epcm == NULL)
            return -ENOMEM;
      epcm->emu = emu;
      epcm->type = CAPTURE_EFX;
      epcm->substream = substream;
      epcm->capture_ipr = IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL;
      epcm->capture_inte = INTE_EFXBUFENABLE;
      epcm->capture_ba_reg = FXBA;
      epcm->capture_bs_reg = FXBS;
      epcm->capture_idx_reg = FXIDX;
      substream->runtime->private_data = epcm;
      substream->runtime->private_free = snd_emu10k1_pcm_free_substream;
      runtime->hw = snd_emu10k1_capture_efx;
      runtime->hw.rates = SNDRV_PCM_RATE_48000;
      runtime->hw.rate_min = runtime->hw.rate_max = 48000;
      spin_lock_irq(&emu->reg_lock);
      if (emu->card_capabilities->emu1010) {
            /*  Nb. of channels has been increased to 16 */
            /* TODO
             * SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE
             * SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
             * SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
             * SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000
             * rate_min = 44100,
             * rate_max = 192000,
             * channels_min = 16,
             * channels_max = 16,
             * Need to add mixer control to fix sample rate
             *                 
             * There are 32 mono channels of 16bits each.
             * 24bit Audio uses 2x channels over 16bit
             * 96kHz uses 2x channels over 48kHz
             * 192kHz uses 4x channels over 48kHz
             * So, for 48kHz 24bit, one has 16 channels
             * for 96kHz 24bit, one has 8 channels
             * for 192kHz 24bit, one has 4 channels
             *
             */
#if 1
            switch (emu->emu1010.internal_clock) {
            case 0:
                  /* For 44.1kHz */
                  runtime->hw.rates = SNDRV_PCM_RATE_44100;
                  runtime->hw.rate_min = runtime->hw.rate_max = 44100;
                  runtime->hw.channels_min =
                        runtime->hw.channels_max = 16;
                  break;
            case 1:
                  /* For 48kHz */
                  runtime->hw.rates = SNDRV_PCM_RATE_48000;
                  runtime->hw.rate_min = runtime->hw.rate_max = 48000;
                  runtime->hw.channels_min =
                        runtime->hw.channels_max = 16;
                  break;
            };
#endif
#if 0
            /* For 96kHz */
            runtime->hw.rates = SNDRV_PCM_RATE_96000;
            runtime->hw.rate_min = runtime->hw.rate_max = 96000;
            runtime->hw.channels_min = runtime->hw.channels_max = 4;
#endif
#if 0
            /* For 192kHz */
            runtime->hw.rates = SNDRV_PCM_RATE_192000;
            runtime->hw.rate_min = runtime->hw.rate_max = 192000;
            runtime->hw.channels_min = runtime->hw.channels_max = 2;
#endif
            runtime->hw.formats = SNDRV_PCM_FMTBIT_S32_LE;
            /* efx_voices_mask[0] is expected to be zero
             * efx_voices_mask[1] is expected to have 32bits set
             */
      } else {
            runtime->hw.channels_min = runtime->hw.channels_max = 0;
            for (idx = 0; idx < nefx; idx++) {
                  if (emu->efx_voices_mask[idx/32] & (1 << (idx%32))) {
                        runtime->hw.channels_min++;
                        runtime->hw.channels_max++;
                  }
            }
      }
      epcm->capture_cr_val = emu->efx_voices_mask[0];
      epcm->capture_cr_val2 = emu->efx_voices_mask[1];
      spin_unlock_irq(&emu->reg_lock);
      emu->capture_efx_interrupt = snd_emu10k1_pcm_efx_interrupt;
      emu->pcm_capture_efx_substream = substream;
      snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, &hw_constraints_capture_period_sizes);
      return 0;
}

static int snd_emu10k1_capture_efx_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);

      emu->capture_interrupt = NULL;
      emu->pcm_capture_efx_substream = NULL;
      return 0;
}

static struct snd_pcm_ops snd_emu10k1_playback_ops = {
      .open =                 snd_emu10k1_playback_open,
      .close =          snd_emu10k1_playback_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_playback_hw_params,
      .hw_free =        snd_emu10k1_playback_hw_free,
      .prepare =        snd_emu10k1_playback_prepare,
      .trigger =        snd_emu10k1_playback_trigger,
      .pointer =        snd_emu10k1_playback_pointer,
      .page =                 snd_pcm_sgbuf_ops_page,
};

static struct snd_pcm_ops snd_emu10k1_capture_ops = {
      .open =                 snd_emu10k1_capture_open,
      .close =          snd_emu10k1_capture_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_capture_hw_params,
      .hw_free =        snd_emu10k1_capture_hw_free,
      .prepare =        snd_emu10k1_capture_prepare,
      .trigger =        snd_emu10k1_capture_trigger,
      .pointer =        snd_emu10k1_capture_pointer,
};

/* EFX playback */
static struct snd_pcm_ops snd_emu10k1_efx_playback_ops = {
      .open =                 snd_emu10k1_efx_playback_open,
      .close =          snd_emu10k1_efx_playback_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_playback_hw_params,
      .hw_free =        snd_emu10k1_efx_playback_hw_free,
      .prepare =        snd_emu10k1_efx_playback_prepare,
      .trigger =        snd_emu10k1_efx_playback_trigger,
      .pointer =        snd_emu10k1_efx_playback_pointer,
      .page =                 snd_pcm_sgbuf_ops_page,
};

int __devinit snd_emu10k1_pcm(struct snd_emu10k1 * emu, int device, struct snd_pcm ** rpcm)
{
      struct snd_pcm *pcm;
      struct snd_pcm_substream *substream;
      int err;

      if (rpcm)
            *rpcm = NULL;

      if ((err = snd_pcm_new(emu->card, "emu10k1", device, 32, 1, &pcm)) < 0)
            return err;

      pcm->private_data = emu;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_emu10k1_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_ops);

      pcm->info_flags = 0;
      pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
      strcpy(pcm->name, "ADC Capture/Standard PCM Playback");
      emu->pcm = pcm;

      for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
            if ((err = snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(emu->pci), 64*1024, 64*1024)) < 0)
                  return err;

      for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; substream; substream = substream->next)
            snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(emu->pci), 64*1024, 64*1024);

      if (rpcm)
            *rpcm = pcm;

      return 0;
}

int __devinit snd_emu10k1_pcm_multi(struct snd_emu10k1 * emu, int device, struct snd_pcm ** rpcm)
{
      struct snd_pcm *pcm;
      struct snd_pcm_substream *substream;
      int err;

      if (rpcm)
            *rpcm = NULL;

      if ((err = snd_pcm_new(emu->card, "emu10k1", device, 1, 0, &pcm)) < 0)
            return err;

      pcm->private_data = emu;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_emu10k1_efx_playback_ops);

      pcm->info_flags = 0;
      pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
      strcpy(pcm->name, "Multichannel Playback");
      emu->pcm_multi = pcm;

      for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
            if ((err = snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG, snd_dma_pci_data(emu->pci), 64*1024, 64*1024)) < 0)
                  return err;

      if (rpcm)
            *rpcm = pcm;

      return 0;
}


static struct snd_pcm_ops snd_emu10k1_capture_mic_ops = {
      .open =                 snd_emu10k1_capture_mic_open,
      .close =          snd_emu10k1_capture_mic_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_capture_hw_params,
      .hw_free =        snd_emu10k1_capture_hw_free,
      .prepare =        snd_emu10k1_capture_prepare,
      .trigger =        snd_emu10k1_capture_trigger,
      .pointer =        snd_emu10k1_capture_pointer,
};

int __devinit snd_emu10k1_pcm_mic(struct snd_emu10k1 * emu, int device, struct snd_pcm ** rpcm)
{
      struct snd_pcm *pcm;
      int err;

      if (rpcm)
            *rpcm = NULL;

      if ((err = snd_pcm_new(emu->card, "emu10k1 mic", device, 0, 1, &pcm)) < 0)
            return err;

      pcm->private_data = emu;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_mic_ops);

      pcm->info_flags = 0;
      strcpy(pcm->name, "Mic Capture");
      emu->pcm_mic = pcm;

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

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

static int snd_emu10k1_pcm_efx_voices_mask_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
      struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
      int nefx = emu->audigy ? 64 : 32;
      uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
      uinfo->count = nefx;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 1;
      return 0;
}

static int snd_emu10k1_pcm_efx_voices_mask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
      int nefx = emu->audigy ? 64 : 32;
      int idx;
      
      spin_lock_irq(&emu->reg_lock);
      for (idx = 0; idx < nefx; idx++)
            ucontrol->value.integer.value[idx] = (emu->efx_voices_mask[idx / 32] & (1 << (idx % 32))) ? 1 : 0;
      spin_unlock_irq(&emu->reg_lock);
      return 0;
}

static int snd_emu10k1_pcm_efx_voices_mask_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_emu10k1 *emu = snd_kcontrol_chip(kcontrol);
      unsigned int nval[2], bits;
      int nefx = emu->audigy ? 64 : 32;
      int nefxb = emu->audigy ? 7 : 6;
      int change, idx;
      
      nval[0] = nval[1] = 0;
      for (idx = 0, bits = 0; idx < nefx; idx++)
            if (ucontrol->value.integer.value[idx]) {
                  nval[idx / 32] |= 1 << (idx % 32);
                  bits++;
            }
            
      for (idx = 0; idx < nefxb; idx++)
            if (1 << idx == bits)
                  break;
      
      if (idx >= nefxb)
            return -EINVAL;

      spin_lock_irq(&emu->reg_lock);
      change = (nval[0] != emu->efx_voices_mask[0]) ||
            (nval[1] != emu->efx_voices_mask[1]);
      emu->efx_voices_mask[0] = nval[0];
      emu->efx_voices_mask[1] = nval[1];
      spin_unlock_irq(&emu->reg_lock);
      return change;
}

static struct snd_kcontrol_new snd_emu10k1_pcm_efx_voices_mask = {
      .iface = SNDRV_CTL_ELEM_IFACE_PCM,
      .name = "Captured FX8010 Outputs",
      .info = snd_emu10k1_pcm_efx_voices_mask_info,
      .get = snd_emu10k1_pcm_efx_voices_mask_get,
      .put = snd_emu10k1_pcm_efx_voices_mask_put
};

static struct snd_pcm_ops snd_emu10k1_capture_efx_ops = {
      .open =                 snd_emu10k1_capture_efx_open,
      .close =          snd_emu10k1_capture_efx_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_capture_hw_params,
      .hw_free =        snd_emu10k1_capture_hw_free,
      .prepare =        snd_emu10k1_capture_prepare,
      .trigger =        snd_emu10k1_capture_trigger,
      .pointer =        snd_emu10k1_capture_pointer,
};


/* EFX playback */

#define INITIAL_TRAM_SHIFT     14
#define INITIAL_TRAM_POS(size) ((((size) / 2) - INITIAL_TRAM_SHIFT) - 1)

static void snd_emu10k1_fx8010_playback_irq(struct snd_emu10k1 *emu, void *private_data)
{
      struct snd_pcm_substream *substream = private_data;
      snd_pcm_period_elapsed(substream);
}

static void snd_emu10k1_fx8010_playback_tram_poke1(unsigned short *dst_left,
                                       unsigned short *dst_right,
                                       unsigned short *src,
                                       unsigned int count,
                                       unsigned int tram_shift)
{
      /* printk("tram_poke1: dst_left = 0x%p, dst_right = 0x%p, src = 0x%p, count = 0x%x\n", dst_left, dst_right, src, count); */
      if ((tram_shift & 1) == 0) {
            while (count--) {
                  *dst_left-- = *src++;
                  *dst_right-- = *src++;
            }
      } else {
            while (count--) {
                  *dst_right-- = *src++;
                  *dst_left-- = *src++;
            }
      }
}

static void fx8010_pb_trans_copy(struct snd_pcm_substream *substream,
                         struct snd_pcm_indirect *rec, size_t bytes)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];
      unsigned int tram_size = pcm->buffer_size;
      unsigned short *src = (unsigned short *)(substream->runtime->dma_area + rec->sw_data);
      unsigned int frames = bytes >> 2, count;
      unsigned int tram_pos = pcm->tram_pos;
      unsigned int tram_shift = pcm->tram_shift;

      while (frames > tram_pos) {
            count = tram_pos + 1;
            snd_emu10k1_fx8010_playback_tram_poke1((unsigned short *)emu->fx8010.etram_pages.area + tram_pos,
                                           (unsigned short *)emu->fx8010.etram_pages.area + tram_pos + tram_size / 2,
                                           src, count, tram_shift);
            src += count * 2;
            frames -= count;
            tram_pos = (tram_size / 2) - 1;
            tram_shift++;
      }
      snd_emu10k1_fx8010_playback_tram_poke1((unsigned short *)emu->fx8010.etram_pages.area + tram_pos,
                                     (unsigned short *)emu->fx8010.etram_pages.area + tram_pos + tram_size / 2,
                                     src, frames, tram_shift);
      tram_pos -= frames;
      pcm->tram_pos = tram_pos;
      pcm->tram_shift = tram_shift;
}

static int snd_emu10k1_fx8010_playback_transfer(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];

      snd_pcm_indirect_playback_transfer(substream, &pcm->pcm_rec, fx8010_pb_trans_copy);
      return 0;
}

static int snd_emu10k1_fx8010_playback_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_emu10k1_fx8010_playback_hw_free(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];
      unsigned int i;

      for (i = 0; i < pcm->channels; i++)
            snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + 0x80 + pcm->etram[i], 0, 0);
      snd_pcm_lib_free_pages(substream);
      return 0;
}

static int snd_emu10k1_fx8010_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];
      unsigned int i;
      
      /* printk("prepare: etram_pages = 0x%p, dma_area = 0x%x, buffer_size = 0x%x (0x%x)\n", emu->fx8010.etram_pages, runtime->dma_area, runtime->buffer_size, runtime->buffer_size << 2); */
      memset(&pcm->pcm_rec, 0, sizeof(pcm->pcm_rec));
      pcm->pcm_rec.hw_buffer_size = pcm->buffer_size * 2; /* byte size */
      pcm->pcm_rec.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream);
      pcm->tram_pos = INITIAL_TRAM_POS(pcm->buffer_size);
      pcm->tram_shift = 0;
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_running, 0, 0);     /* reset */
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_trigger, 0, 0);     /* reset */
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_size, 0, runtime->buffer_size);
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_ptr, 0, 0);         /* reset ptr number */
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_count, 0, runtime->period_size);
      snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_tmpcount, 0, runtime->period_size);
      for (i = 0; i < pcm->channels; i++)
            snd_emu10k1_ptr_write(emu, TANKMEMADDRREGBASE + 0x80 + pcm->etram[i], 0, (TANKMEMADDRREG_READ|TANKMEMADDRREG_ALIGN) + i * (runtime->buffer_size / pcm->channels));
      return 0;
}

static int snd_emu10k1_fx8010_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];
      int result = 0;

      spin_lock(&emu->reg_lock);
      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
            /* follow thru */
      case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
      case SNDRV_PCM_TRIGGER_RESUME:
#ifdef EMU10K1_SET_AC3_IEC958
      {
            int i;
            for (i = 0; i < 3; i++) {
                  unsigned int bits;
                  bits = SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
                         SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC | SPCS_GENERATIONSTATUS |
                         0x00001200 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT | SPCS_NOTAUDIODATA;
                  snd_emu10k1_ptr_write(emu, SPCS0 + i, 0, bits);
            }
      }
#endif
            result = snd_emu10k1_fx8010_register_irq_handler(emu, snd_emu10k1_fx8010_playback_irq, pcm->gpr_running, substream, &pcm->irq);
            if (result < 0)
                  goto __err;
            snd_emu10k1_fx8010_playback_transfer(substream);      /* roll the ball */
            snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_trigger, 0, 1);
            break;
      case SNDRV_PCM_TRIGGER_STOP:
      case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
      case SNDRV_PCM_TRIGGER_SUSPEND:
            snd_emu10k1_fx8010_unregister_irq_handler(emu, pcm->irq); pcm->irq = NULL;
            snd_emu10k1_ptr_write(emu, emu->gpr_base + pcm->gpr_trigger, 0, 0);
            pcm->tram_pos = INITIAL_TRAM_POS(pcm->buffer_size);
            pcm->tram_shift = 0;
            break;
      default:
            result = -EINVAL;
            break;
      }
      __err:
      spin_unlock(&emu->reg_lock);
      return result;
}

static snd_pcm_uframes_t snd_emu10k1_fx8010_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];
      size_t ptr; /* byte pointer */

      if (!snd_emu10k1_ptr_read(emu, emu->gpr_base + pcm->gpr_trigger, 0))
            return 0;
      ptr = snd_emu10k1_ptr_read(emu, emu->gpr_base + pcm->gpr_ptr, 0) << 2;
      return snd_pcm_indirect_playback_pointer(substream, &pcm->pcm_rec, ptr);
}

static struct snd_pcm_hardware snd_emu10k1_fx8010_playback =
{
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_RESUME |
                         /* SNDRV_PCM_INFO_MMAP_VALID | */ SNDRV_PCM_INFO_PAUSE),
      .formats =        SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
      .rates =          SNDRV_PCM_RATE_48000,
      .rate_min =       48000,
      .rate_max =       48000,
      .channels_min =         1,
      .channels_max =         1,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     1024,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static int snd_emu10k1_fx8010_playback_open(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];

      runtime->hw = snd_emu10k1_fx8010_playback;
      runtime->hw.channels_min = runtime->hw.channels_max = pcm->channels;
      runtime->hw.period_bytes_max = (pcm->buffer_size * 2) / 2;
      spin_lock_irq(&emu->reg_lock);
      if (pcm->valid == 0) {
            spin_unlock_irq(&emu->reg_lock);
            return -ENODEV;
      }
      pcm->opened = 1;
      spin_unlock_irq(&emu->reg_lock);
      return 0;
}

static int snd_emu10k1_fx8010_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
      struct snd_emu10k1_fx8010_pcm *pcm = &emu->fx8010.pcm[substream->number];

      spin_lock_irq(&emu->reg_lock);
      pcm->opened = 0;
      spin_unlock_irq(&emu->reg_lock);
      return 0;
}

static struct snd_pcm_ops snd_emu10k1_fx8010_playback_ops = {
      .open =                 snd_emu10k1_fx8010_playback_open,
      .close =          snd_emu10k1_fx8010_playback_close,
      .ioctl =          snd_pcm_lib_ioctl,
      .hw_params =            snd_emu10k1_fx8010_playback_hw_params,
      .hw_free =        snd_emu10k1_fx8010_playback_hw_free,
      .prepare =        snd_emu10k1_fx8010_playback_prepare,
      .trigger =        snd_emu10k1_fx8010_playback_trigger,
      .pointer =        snd_emu10k1_fx8010_playback_pointer,
      .ack =                  snd_emu10k1_fx8010_playback_transfer,
};

int __devinit snd_emu10k1_pcm_efx(struct snd_emu10k1 * emu, int device, struct snd_pcm ** rpcm)
{
      struct snd_pcm *pcm;
      struct snd_kcontrol *kctl;
      int err;

      if (rpcm)
            *rpcm = NULL;

      if ((err = snd_pcm_new(emu->card, "emu10k1 efx", device, 8, 1, &pcm)) < 0)
            return err;

      pcm->private_data = emu;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_emu10k1_fx8010_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_emu10k1_capture_efx_ops);

      pcm->info_flags = 0;
      strcpy(pcm->name, "Multichannel Capture/PT Playback");
      emu->pcm_efx = pcm;
      if (rpcm)
            *rpcm = pcm;

      /* EFX capture - record the "FXBUS2" channels, by default we connect the EXTINs 
       * to these
       */   
      
      /* emu->efx_voices_mask[0] = FXWC_DEFAULTROUTE_C | FXWC_DEFAULTROUTE_A; */
      if (emu->audigy) {
            emu->efx_voices_mask[0] = 0;
            if (emu->card_capabilities->emu1010)
                  /* Pavel Hofman - 32 voices will be used for
                   * capture (write mode) -
                   * each bit = corresponding voice
                   */
                  emu->efx_voices_mask[1] = 0xffffffff;
            else
                  emu->efx_voices_mask[1] = 0xffff;
      } else {
            emu->efx_voices_mask[0] = 0xffff0000;
            emu->efx_voices_mask[1] = 0;
      }
      /* For emu1010, the control has to set 32 upper bits (voices)
       * out of the 64 bits (voices) to true for the 16-channels capture
       * to work correctly. Correct A_FXWC2 initial value (0xffffffff)
       * is already defined but the snd_emu10k1_pcm_efx_voices_mask
       * control can override this register's value.
       */
      kctl = snd_ctl_new1(&snd_emu10k1_pcm_efx_voices_mask, emu);
      if (!kctl)
            return -ENOMEM;
      kctl->id.device = device;
      snd_ctl_add(emu->card, kctl);

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

      return 0;
}

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