Logo Search packages:      
Sourcecode: alsa-driver version File versions  Download package

msnd.c

/*********************************************************************
 *
 * 2002/06/30 Karsten Wiese:
 *    removed kernel-version dependencies.
 *    ripped from linux kernel 2.4.18 (OSS Implementation) by me.
 *    In the OSS Version, this file is compiled to a separate MODULE,
 *    that is used by the pinnacle and the classic driver.
 *    since there is no classic driver for alsa yet (i dont have a classic
 *    & writing one blindfold is difficult) this file's object is statically
 *    linked into the pinnacle-driver-module for now. look for the string
 *          "uncomment this to make this a module again"
 *    to do guess what.
 *
 * the following is a copy of the 2.4.18 OSS FREE file-heading comment:
 *
 * msnd.c - Driver Base
 *
 * Turtle Beach MultiSound Sound Card Driver for Linux
 *
 * Copyright (C) 1998 Andrew Veliath
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ********************************************************************/

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/fs.h>
#include <linux/delay.h>

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "msnd.h"

#define LOGNAME               "msnd"


void snd_msnd_init_queue(void *base, int start, int size)
{
      writew(PCTODSP_BASED(start), base + JQS_wStart);
      writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize);
      writew(0, base + JQS_wHead);
      writew(0, base + JQS_wTail);
}
EXPORT_SYMBOL(snd_msnd_init_queue);

static int snd_msnd_wait_TXDE(struct snd_msnd *dev)
{
      unsigned int io = dev->io;
      int timeout = 1000;

      while (timeout-- > 0)
            if (inb(io + HP_ISR) & HPISR_TXDE)
                  return 0;

      return -EIO;
}

static int snd_msnd_wait_HC0(struct snd_msnd *dev)
{
      unsigned int io = dev->io;
      int timeout = 1000;

      while (timeout-- > 0)
            if (!(inb(io + HP_CVR) & HPCVR_HC))
                  return 0;

      return -EIO;
}

int snd_msnd_send_dsp_cmd(struct snd_msnd *dev, u8 cmd)
{
      unsigned long flags;

      spin_lock_irqsave(&dev->lock, flags);
      if (snd_msnd_wait_HC0(dev) == 0) {
            outb(cmd, dev->io + HP_CVR);
            spin_unlock_irqrestore(&dev->lock, flags);
            return 0;
      }
      spin_unlock_irqrestore(&dev->lock, flags);

      snd_printd(KERN_ERR LOGNAME ": Send DSP command timeout\n");

      return -EIO;
}
EXPORT_SYMBOL(snd_msnd_send_dsp_cmd);

int snd_msnd_send_word(struct snd_msnd *dev, unsigned char high,
               unsigned char mid, unsigned char low)
{
      unsigned int io = dev->io;

      if (snd_msnd_wait_TXDE(dev) == 0) {
            outb(high, io + HP_TXH);
            outb(mid, io + HP_TXM);
            outb(low, io + HP_TXL);
            return 0;
      }

      snd_printd(KERN_ERR LOGNAME ": Send host word timeout\n");

      return -EIO;
}
EXPORT_SYMBOL(snd_msnd_send_word);

int snd_msnd_upload_host(struct snd_msnd *dev, const u8 *bin, int len)
{
      int i;

      if (len % 3 != 0) {
            snd_printk(KERN_ERR LOGNAME
                     ": Upload host data not multiple of 3!\n");
            return -EINVAL;
      }

      for (i = 0; i < len; i += 3)
            if (snd_msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2]))
                  return -EIO;

      inb(dev->io + HP_RXL);
      inb(dev->io + HP_CVR);

      return 0;
}
EXPORT_SYMBOL(snd_msnd_upload_host);

int snd_msnd_enable_irq(struct snd_msnd *dev)
{
      unsigned long flags;

      if (dev->irq_ref++)
            return 0;

      snd_printdd(LOGNAME ": Enabling IRQ\n");

      spin_lock_irqsave(&dev->lock, flags);
      if (snd_msnd_wait_TXDE(dev) == 0) {
            outb(inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR);
            if (dev->type == msndClassic)
                  outb(dev->irqid, dev->io + HP_IRQM);

            outb(inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR);
            outb(inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR);
            enable_irq(dev->irq);
            snd_msnd_init_queue(dev->DSPQ, dev->dspq_data_buff,
                            dev->dspq_buff_size);
            spin_unlock_irqrestore(&dev->lock, flags);
            return 0;
      }
      spin_unlock_irqrestore(&dev->lock, flags);

      snd_printd(KERN_ERR LOGNAME ": Enable IRQ failed\n");

      return -EIO;
}
EXPORT_SYMBOL(snd_msnd_enable_irq);

int snd_msnd_disable_irq(struct snd_msnd *dev)
{
      unsigned long flags;

      if (--dev->irq_ref > 0)
            return 0;

      if (dev->irq_ref < 0)
            snd_printd(KERN_WARNING LOGNAME ": IRQ ref count is %d\n",
                     dev->irq_ref);

      snd_printdd(LOGNAME ": Disabling IRQ\n");

      spin_lock_irqsave(&dev->lock, flags);
      if (snd_msnd_wait_TXDE(dev) == 0) {
            outb(inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR);
            if (dev->type == msndClassic)
                  outb(HPIRQ_NONE, dev->io + HP_IRQM);
            disable_irq(dev->irq);
            spin_unlock_irqrestore(&dev->lock, flags);
            return 0;
      }
      spin_unlock_irqrestore(&dev->lock, flags);

      snd_printd(KERN_ERR LOGNAME ": Disable IRQ failed\n");

      return -EIO;
}
EXPORT_SYMBOL(snd_msnd_disable_irq);

static inline long get_play_delay_jiffies(struct snd_msnd *chip, long size)
{
      long tmp = (size * HZ * chip->play_sample_size) / 8;
      return tmp / (chip->play_sample_rate * chip->play_channels);
}

static void snd_msnd_dsp_write_flush(struct snd_msnd *chip)
{
      if (!(chip->mode & FMODE_WRITE) || !test_bit(F_WRITING, &chip->flags))
            return;
      set_bit(F_WRITEFLUSH, &chip->flags);
/*    interruptible_sleep_on_timeout(
            &chip->writeflush,
            get_play_delay_jiffies(&chip, chip->DAPF.len));*/
      clear_bit(F_WRITEFLUSH, &chip->flags);
      if (!signal_pending(current))
            schedule_timeout_interruptible(
                  get_play_delay_jiffies(chip, chip->play_period_bytes));
      clear_bit(F_WRITING, &chip->flags);
}

void snd_msnd_dsp_halt(struct snd_msnd *chip, struct file *file)
{
      if ((file ? file->f_mode : chip->mode) & FMODE_READ) {
            clear_bit(F_READING, &chip->flags);
            snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP);
            snd_msnd_disable_irq(chip);
            if (file) {
                  snd_printd(KERN_INFO LOGNAME
                           ": Stopping read for %p\n", file);
                  chip->mode &= ~FMODE_READ;
            }
            clear_bit(F_AUDIO_READ_INUSE, &chip->flags);
      }
      if ((file ? file->f_mode : chip->mode) & FMODE_WRITE) {
            if (test_bit(F_WRITING, &chip->flags)) {
                  snd_msnd_dsp_write_flush(chip);
                  snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP);
            }
            snd_msnd_disable_irq(chip);
            if (file) {
                  snd_printd(KERN_INFO
                           LOGNAME ": Stopping write for %p\n", file);
                  chip->mode &= ~FMODE_WRITE;
            }
            clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
      }
}
EXPORT_SYMBOL(snd_msnd_dsp_halt);


int snd_msnd_DARQ(struct snd_msnd *chip, int bank)
{
      int /*size, n,*/ timeout = 3;
      u16 wTmp;
      /* void *DAQD; */

      /* Increment the tail and check for queue wrap */
      wTmp = readw(chip->DARQ + JQS_wTail) + PCTODSP_OFFSET(DAQDS__size);
      if (wTmp > readw(chip->DARQ + JQS_wSize))
            wTmp = 0;
      while (wTmp == readw(chip->DARQ + JQS_wHead) && timeout--)
            udelay(1);

      if (chip->capturePeriods == 2) {
            void *pDAQ = chip->mappedbase + DARQ_DATA_BUFF +
                       bank * DAQDS__size + DAQDS_wStart;
            unsigned short offset = 0x3000 + chip->capturePeriodBytes;

            if (readw(pDAQ) != PCTODSP_BASED(0x3000))
                  offset = 0x3000;
            writew(PCTODSP_BASED(offset), pDAQ);
      }

      writew(wTmp, chip->DARQ + JQS_wTail);

#if 0
      /* Get our digital audio queue struct */
      DAQD = bank * DAQDS__size + chip->mappedbase + DARQ_DATA_BUFF;

      /* Get length of data */
      size = readw(DAQD + DAQDS_wSize);

      /* Read data from the head (unprotected bank 1 access okay
         since this is only called inside an interrupt) */
      outb(HPBLKSEL_1, chip->io + HP_BLKS);
      n = msnd_fifo_write(&chip->DARF,
                      (char *)(chip->base + bank * DAR_BUFF_SIZE),
                      size, 0);
      if (n <= 0) {
            outb(HPBLKSEL_0, chip->io + HP_BLKS);
            return n;
      }
      outb(HPBLKSEL_0, chip->io + HP_BLKS);
#endif

      return 1;
}
EXPORT_SYMBOL(snd_msnd_DARQ);

int snd_msnd_DAPQ(struct snd_msnd *chip, int start)
{
      u16   DAPQ_tail;
      int   protect = start, nbanks = 0;
      void  *DAQD;
      static int play_banks_submitted;
      /* unsigned long flags;
      spin_lock_irqsave(&chip->lock, flags); not necessary */

      DAPQ_tail = readw(chip->DAPQ + JQS_wTail);
      while (DAPQ_tail != readw(chip->DAPQ + JQS_wHead) || start) {
            int bank_num = DAPQ_tail / PCTODSP_OFFSET(DAQDS__size);

            if (start) {
                  start = 0;
                  play_banks_submitted = 0;
            }

            /* Get our digital audio queue struct */
            DAQD = bank_num * DAQDS__size + chip->mappedbase +
                  DAPQ_DATA_BUFF;

            /* Write size of this bank */
            writew(chip->play_period_bytes, DAQD + DAQDS_wSize);
            if (play_banks_submitted < 3)
                  ++play_banks_submitted;
            else if (chip->playPeriods == 2) {
                  unsigned short offset = chip->play_period_bytes;

                  if (readw(DAQD + DAQDS_wStart) != PCTODSP_BASED(0x0))
                        offset = 0;

                  writew(PCTODSP_BASED(offset), DAQD + DAQDS_wStart);
            }
            ++nbanks;

            /* Then advance the tail */
            /*
            if (protect)
                  snd_printd(KERN_INFO "B %X %lX\n",
                           bank_num, xtime.tv_usec);
            */

            DAPQ_tail = (++bank_num % 3) * PCTODSP_OFFSET(DAQDS__size);
            writew(DAPQ_tail, chip->DAPQ + JQS_wTail);
            /* Tell the DSP to play the bank */
            snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_START);
            if (protect)
                  if (2 == bank_num)
                        break;
      }
      /*
      if (protect)
            snd_printd(KERN_INFO "%lX\n", xtime.tv_usec);
      */
      /* spin_unlock_irqrestore(&chip->lock, flags); not necessary */
      return nbanks;
}
EXPORT_SYMBOL(snd_msnd_DAPQ);

static void snd_msnd_play_reset_queue(struct snd_msnd *chip,
                              unsigned int pcm_periods,
                              unsigned int pcm_count)
{
      int   n;
      void  *pDAQ = chip->mappedbase + DAPQ_DATA_BUFF;

      chip->last_playbank = -1;
      chip->playLimit = pcm_count * (pcm_periods - 1);
      chip->playPeriods = pcm_periods;
      writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wHead);
      writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wTail);

      chip->play_period_bytes = pcm_count;

      for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) {
            writew(PCTODSP_BASED((u32)(pcm_count * n)),
                  pDAQ + DAQDS_wStart);
            writew(0, pDAQ + DAQDS_wSize);
            writew(1, pDAQ + DAQDS_wFormat);
            writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize);
            writew(chip->play_channels, pDAQ + DAQDS_wChannels);
            writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate);
            writew(HIMT_PLAY_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg);
            writew(n, pDAQ + DAQDS_wFlags);
      }
}

static void snd_msnd_capture_reset_queue(struct snd_msnd *chip,
                               unsigned int pcm_periods,
                               unsigned int pcm_count)
{
      int         n;
      void        *pDAQ;
      /* unsigned long  flags; */

      /* snd_msnd_init_queue(chip->DARQ, DARQ_DATA_BUFF, DARQ_BUFF_SIZE); */

      chip->last_recbank = 2;
      chip->captureLimit = pcm_count * (pcm_periods - 1);
      chip->capturePeriods = pcm_periods;
      writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DARQ + JQS_wHead);
      writew(PCTODSP_OFFSET(chip->last_recbank * DAQDS__size),
            chip->DARQ + JQS_wTail);

#if 0 /* Critical section: bank 1 access. this is how the OSS driver does it:*/
      spin_lock_irqsave(&chip->lock, flags);
      outb(HPBLKSEL_1, chip->io + HP_BLKS);
      memset_io(chip->mappedbase, 0, DAR_BUFF_SIZE * 3);
      outb(HPBLKSEL_0, chip->io + HP_BLKS);
      spin_unlock_irqrestore(&chip->lock, flags);
#endif

      chip->capturePeriodBytes = pcm_count;
      snd_printdd("snd_msnd_capture_reset_queue() %i\n", pcm_count);

      pDAQ = chip->mappedbase + DARQ_DATA_BUFF;

      for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) {
            u32 tmp = pcm_count * n;

            writew(PCTODSP_BASED(tmp + 0x3000), pDAQ + DAQDS_wStart);
            writew(pcm_count, pDAQ + DAQDS_wSize);
            writew(1, pDAQ + DAQDS_wFormat);
            writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize);
            writew(chip->capture_channels, pDAQ + DAQDS_wChannels);
            writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate);
            writew(HIMT_RECORD_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg);
            writew(n, pDAQ + DAQDS_wFlags);
      }
}

static struct snd_pcm_hardware snd_msnd_playback = {
      .info =                 SNDRV_PCM_INFO_MMAP |
                        SNDRV_PCM_INFO_INTERLEAVED |
                        SNDRV_PCM_INFO_MMAP_VALID |
                        SNDRV_PCM_INFO_BATCH,
      .formats =        SNDRV_PCM_FMTBIT_U8 | 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 =     0x3000,
      .period_bytes_min =     0x40,
      .period_bytes_max =     0x1800,
      .periods_min =          2,
      .periods_max =          3,
      .fifo_size =            0,
};

static struct snd_pcm_hardware snd_msnd_capture = {
      .info =                 SNDRV_PCM_INFO_MMAP |
                        SNDRV_PCM_INFO_INTERLEAVED |
                        SNDRV_PCM_INFO_MMAP_VALID |
                        SNDRV_PCM_INFO_BATCH,
      .formats =        SNDRV_PCM_FMTBIT_U8 | 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 =     0x3000,
      .period_bytes_min =     0x40,
      .period_bytes_max =     0x1800,
      .periods_min =          2,
      .periods_max =          3,
      .fifo_size =            0,
};


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

      set_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
      clear_bit(F_WRITING, &chip->flags);
      snd_msnd_enable_irq(chip);

      runtime->dma_area = chip->mappedbase;
      runtime->dma_bytes = 0x3000;

      chip->playback_substream = substream;
      runtime->hw = snd_msnd_playback;
      return 0;
}

static int snd_msnd_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);

      snd_msnd_disable_irq(chip);
      clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags);
      return 0;
}


static int snd_msnd_playback_hw_params(struct snd_pcm_substream *substream,
                              struct snd_pcm_hw_params *params)
{
      int   i;
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);
      void  *pDAQ =     chip->mappedbase + DAPQ_DATA_BUFF;

      chip->play_sample_size = snd_pcm_format_width(params_format(params));
      chip->play_channels = params_channels(params);
      chip->play_sample_rate = params_rate(params);

      for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) {
            writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize);
            writew(chip->play_channels, pDAQ + DAQDS_wChannels);
            writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate);
      }
      /* dont do this here:
       * snd_msnd_calibrate_adc(chip->play_sample_rate);
       */

      return 0;
}

static int snd_msnd_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);
      unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream);
      unsigned int pcm_count = snd_pcm_lib_period_bytes(substream);
      unsigned int pcm_periods = pcm_size / pcm_count;

      snd_msnd_play_reset_queue(chip, pcm_periods, pcm_count);
      chip->playDMAPos = 0;
      return 0;
}

static int snd_msnd_playback_trigger(struct snd_pcm_substream *substream,
                             int cmd)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);
      int   result = 0;

      if (cmd == SNDRV_PCM_TRIGGER_START) {
            snd_printdd("snd_msnd_playback_trigger(START)\n");
            chip->banksPlayed = 0;
            set_bit(F_WRITING, &chip->flags);
            snd_msnd_DAPQ(chip, 1);
      } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
            snd_printdd("snd_msnd_playback_trigger(STop)\n");
            /* interrupt diagnostic, comment this out later */
            clear_bit(F_WRITING, &chip->flags);
            snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP);
      } else {
            snd_printd(KERN_ERR "snd_msnd_playback_trigger(?????)\n");
            result = -EINVAL;
      }

      snd_printdd("snd_msnd_playback_trigger() ENDE\n");
      return result;
}

static snd_pcm_uframes_t
snd_msnd_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);

      return bytes_to_frames(substream->runtime, chip->playDMAPos);
}


static struct snd_pcm_ops snd_msnd_playback_ops = {
      .open =           snd_msnd_playback_open,
      .close =    snd_msnd_playback_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_msnd_playback_hw_params,
      .prepare =  snd_msnd_playback_prepare,
      .trigger =  snd_msnd_playback_trigger,
      .pointer =  snd_msnd_playback_pointer,
};

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

      set_bit(F_AUDIO_READ_INUSE, &chip->flags);
      snd_msnd_enable_irq(chip);
      runtime->dma_area = chip->mappedbase + 0x3000;
      runtime->dma_bytes = 0x3000;
      memset(runtime->dma_area, 0, runtime->dma_bytes);
      chip->capture_substream = substream;
      runtime->hw = snd_msnd_capture;
      return 0;
}

static int snd_msnd_capture_close(struct snd_pcm_substream *substream)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);

      snd_msnd_disable_irq(chip);
      clear_bit(F_AUDIO_READ_INUSE, &chip->flags);
      return 0;
}

static int snd_msnd_capture_prepare(struct snd_pcm_substream *substream)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);
      unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream);
      unsigned int pcm_count = snd_pcm_lib_period_bytes(substream);
      unsigned int pcm_periods = pcm_size / pcm_count;

      snd_msnd_capture_reset_queue(chip, pcm_periods, pcm_count);
      chip->captureDMAPos = 0;
      return 0;
}

static int snd_msnd_capture_trigger(struct snd_pcm_substream *substream,
                            int cmd)
{
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);

      if (cmd == SNDRV_PCM_TRIGGER_START) {
            chip->last_recbank = -1;
            set_bit(F_READING, &chip->flags);
            if (snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_START) == 0)
                  return 0;

            clear_bit(F_READING, &chip->flags);
      } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
            clear_bit(F_READING, &chip->flags);
            snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP);
            return 0;
      }
      return -EINVAL;
}


static snd_pcm_uframes_t
snd_msnd_capture_pointer(struct snd_pcm_substream *substream)
{
      struct snd_pcm_runtime *runtime = substream->runtime;
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);

      return bytes_to_frames(runtime, chip->captureDMAPos);
}


static int snd_msnd_capture_hw_params(struct snd_pcm_substream *substream,
                              struct snd_pcm_hw_params *params)
{
      int         i;
      struct snd_msnd *chip = snd_pcm_substream_chip(substream);
      void        *pDAQ = chip->mappedbase + DARQ_DATA_BUFF;

      chip->capture_sample_size = snd_pcm_format_width(params_format(params));
      chip->capture_channels = params_channels(params);
      chip->capture_sample_rate = params_rate(params);

      for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) {
            writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize);
            writew(chip->capture_channels, pDAQ + DAQDS_wChannels);
            writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate);
      }
      return 0;
}


static struct snd_pcm_ops snd_msnd_capture_ops = {
      .open =           snd_msnd_capture_open,
      .close =    snd_msnd_capture_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_msnd_capture_hw_params,
      .prepare =  snd_msnd_capture_prepare,
      .trigger =  snd_msnd_capture_trigger,
      .pointer =  snd_msnd_capture_pointer,
};


int snd_msnd_pcm(struct snd_card *card, int device,
                  struct snd_pcm **rpcm)
{
      struct snd_msnd *chip = card->private_data;
      struct snd_pcm    *pcm;
      int err;

      err = snd_pcm_new(card, "MSNDPINNACLE", device, 1, 1, &pcm);
      if (err < 0)
            return err;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_msnd_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_msnd_capture_ops);

      pcm->private_data = chip;
      strcpy(pcm->name, "Hurricane");


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

MODULE_DESCRIPTION("Common routines for Turtle Beach Multisound drivers");
MODULE_LICENSE("GPL");


Generated by  Doxygen 1.6.0   Back to index