text: /*
   **********************************************************************
   *     audio.c -- /dev/dsp interface for emu10k1 driver
   *     Copyright 1999, 2000 Creative Labs, Inc.
   *
   **********************************************************************
   *
   *     Date                 Author          Summary of changes
   *     ----                 ------          ------------------
   *     October 20, 1999     Bertrand Lee    base code release
   *     November 2, 1999	    Alan Cox        cleaned up types/leaks
   *
   **********************************************************************
   *
   *     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/module.h>
  #include <linux/poll.h>
  #include <linux/slab.h>
  #include <linux/bitops.h>
  #include <asm/io.h>
  #include <linux/sched.h>
  #include <linux/smp_lock.h>
  
  #include "hwaccess.h"
  #include "cardwo.h"
  #include "cardwi.h"
  #include "recmgr.h"
  #include "irqmgr.h"
  #include "audio.h"
  #include "8010.h"
  
  static void calculate_ofrag(struct woinst *);
  static void calculate_ifrag(struct wiinst *);
  
  static void emu10k1_waveout_bh(unsigned long refdata);
  static void emu10k1_wavein_bh(unsigned long refdata);
  
  /* Audio file operations */
  static ssize_t emu10k1_audio_read(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	struct wiinst *wiinst = wave_dev->wiinst;
  	ssize_t ret = 0;
  	unsigned long flags;
  
  	DPD(3, "emu10k1_audio_read(), buffer=%p, count=%d\n", buffer, (u32) count);
  
  	if (!access_ok(VERIFY_WRITE, buffer, count))
  		return -EFAULT;
  
  	spin_lock_irqsave(&wiinst->lock, flags);
  
  	if (wiinst->mmapped) {
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  		return -ENXIO;
  	}
  
  	if (wiinst->state == WAVE_STATE_CLOSED) {
  		calculate_ifrag(wiinst);
  
  		while (emu10k1_wavein_open(wave_dev) < 0) {
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  
  			if (file->f_flags & O_NONBLOCK)
  				return -EAGAIN;
  
  			interruptible_sleep_on(&wave_dev->card->open_wait);
  
  			if (signal_pending(current))
  				return -ERESTARTSYS;
  
  			spin_lock_irqsave(&wiinst->lock, flags);
  		}
  	}
  
  	spin_unlock_irqrestore(&wiinst->lock, flags);
  
  	while (count > 0) {
  		u32 bytestocopy;
  
  		spin_lock_irqsave(&wiinst->lock, flags);
  
  		if (!(wiinst->state & WAVE_STATE_STARTED)
  		    && (wave_dev->enablebits & PCM_ENABLE_INPUT))
  			emu10k1_wavein_start(wave_dev);
  
  		emu10k1_wavein_update(wave_dev->card, wiinst);
  		emu10k1_wavein_getxfersize(wiinst, &bytestocopy);
  
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  
  		DPD(3, "bytestocopy --> %d\n", bytestocopy);
  
  		if ((bytestocopy >= wiinst->buffer.fragment_size)
  		    || (bytestocopy >= count)) {
  			bytestocopy = min_t(u32, bytestocopy, count);
  
  			emu10k1_wavein_xferdata(wiinst, (u8 __user *)buffer, &bytestocopy);
  
  			count -= bytestocopy;
  			buffer += bytestocopy;
  			ret += bytestocopy;
  		}
  
  		if (count > 0) {
  			if ((file->f_flags & O_NONBLOCK)
  			    || (!(wave_dev->enablebits & PCM_ENABLE_INPUT)))
  				return (ret ? ret : -EAGAIN);
  
  			interruptible_sleep_on(&wiinst->wait_queue);
  
  			if (signal_pending(current))
  				return (ret ? ret : -ERESTARTSYS);
  
  		}
  	}
  
  	DPD(3, "bytes copied -> %d\n", (u32) ret);
  
  	return ret;
  }
  
  static ssize_t emu10k1_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t * ppos)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	struct woinst *woinst = wave_dev->woinst;
  	ssize_t ret;
  	unsigned long flags;
  
  	DPD(3, "emu10k1_audio_write(), buffer=%p, count=%d\n", buffer, (u32) count);
  
  	if (!access_ok(VERIFY_READ, buffer, count))
  		return -EFAULT;
  
  	spin_lock_irqsave(&woinst->lock, flags);
  
  	if (woinst->mmapped) {
  		spin_unlock_irqrestore(&woinst->lock, flags);
  		return -ENXIO;
  	}
  	// This is for emu10k1 revs less than 7, we need to go through tram
  	if (woinst->format.passthrough == 1) {
  		int r;
  		
  		woinst->buffer.ossfragshift = PT_BLOCKSIZE_LOG2;
  		woinst->buffer.numfrags = PT_BLOCKCOUNT;
  		calculate_ofrag(woinst);
  		
  		r = emu10k1_pt_write(file, buffer, count);
  		spin_unlock_irqrestore(&woinst->lock, flags);
  		return r;
  	}
  
  	if (woinst->state == WAVE_STATE_CLOSED) {
  		calculate_ofrag(woinst);
  
  		while (emu10k1_waveout_open(wave_dev) < 0) {
  			spin_unlock_irqrestore(&woinst->lock, flags);
  
  			if (file->f_flags & O_NONBLOCK)
  				return -EAGAIN;
  
  			interruptible_sleep_on(&wave_dev->card->open_wait);
  
  			if (signal_pending(current))
  				return -ERESTARTSYS;
  
  			spin_lock_irqsave(&woinst->lock, flags);
  		}
  	}
  
  	spin_unlock_irqrestore(&woinst->lock, flags);
  
  	ret = 0;
  	if (count % woinst->format.bytespersample)
                  return -EINVAL;
  
  	count /= woinst->num_voices;
  
  	while (count > 0) {
  		u32 bytestocopy;
  
  		spin_lock_irqsave(&woinst->lock, flags);
  		emu10k1_waveout_update(woinst);
  		emu10k1_waveout_getxfersize(woinst, &bytestocopy);
  		spin_unlock_irqrestore(&woinst->lock, flags);
  
  		DPD(3, "bytestocopy --> %d\n", bytestocopy);
  
  		if ((bytestocopy >= woinst->buffer.fragment_size)
  		    || (bytestocopy >= count)) {
  
  			bytestocopy = min_t(u32, bytestocopy, count);
  
  			emu10k1_waveout_xferdata(woinst, (u8 __user *) buffer, &bytestocopy);
  
  			count -= bytestocopy;
  			buffer += bytestocopy * woinst->num_voices;
  			ret += bytestocopy * woinst->num_voices;
  
  			spin_lock_irqsave(&woinst->lock, flags);
  			woinst->total_copied += bytestocopy;
  
  			if (!(woinst->state & WAVE_STATE_STARTED)
  			    && (wave_dev->enablebits & PCM_ENABLE_OUTPUT)
  			    && (woinst->total_copied >= woinst->buffer.fragment_size))
  				emu10k1_waveout_start(wave_dev);
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		if (count > 0) {
  			if ((file->f_flags & O_NONBLOCK)
  			    || (!(wave_dev->enablebits & PCM_ENABLE_OUTPUT)))
  				return (ret ? ret : -EAGAIN);
  
  			interruptible_sleep_on(&woinst->wait_queue);
  
  			if (signal_pending(current))
  				return (ret ? ret : -ERESTARTSYS);
  		}
  	}
  
  	DPD(3, "bytes copied -> %d\n", (u32) ret);
  
  	return ret;
  }
  
  static int emu10k1_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	struct woinst *woinst = NULL;
  	struct wiinst *wiinst = NULL;
  	int val = 0;
  	u32 bytestocopy;
  	unsigned long flags;
  	int __user *p = (int __user *)arg;
  
  	DPF(4, "emu10k1_audio_ioctl()\n");
  
  	if (file->f_mode & FMODE_WRITE)
  		woinst = wave_dev->woinst;
  
  	if (file->f_mode & FMODE_READ)
  		wiinst = wave_dev->wiinst;
  
  	switch (cmd) {
  	case OSS_GETVERSION:
  		DPF(2, "OSS_GETVERSION:\n");
  		return put_user(SOUND_VERSION, p);
  
  	case SNDCTL_DSP_RESET:
  		DPF(2, "SNDCTL_DSP_RESET:\n");
  		wave_dev->enablebits = PCM_ENABLE_OUTPUT | PCM_ENABLE_INPUT;
  
  		if (file->f_mode & FMODE_WRITE) {
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (woinst->state & WAVE_STATE_OPEN) {
  				emu10k1_waveout_close(wave_dev);
  			}
  
  			woinst->mmapped = 0;
  			woinst->total_copied = 0;
  			woinst->total_played = 0;
  			woinst->blocks = 0;
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		if (file->f_mode & FMODE_READ) {
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			if (wiinst->state & WAVE_STATE_OPEN) {
  				emu10k1_wavein_close(wave_dev);
  			}
  
  			wiinst->mmapped = 0;
  			wiinst->total_recorded = 0;
  			wiinst->blocks = 0;
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  		}
  
  		break;
  
  	case SNDCTL_DSP_SYNC:
  		DPF(2, "SNDCTL_DSP_SYNC:\n");
  
  		if (file->f_mode & FMODE_WRITE) {
  
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (woinst->state & WAVE_STATE_OPEN) {
  
  				if (woinst->state & WAVE_STATE_STARTED)
  					while ((woinst->total_played < woinst->total_copied)
  					       && !signal_pending(current)) {
  						spin_unlock_irqrestore(&woinst->lock, flags);
  						interruptible_sleep_on(&woinst->wait_queue);
  						spin_lock_irqsave(&woinst->lock, flags);
  					}
  				emu10k1_waveout_close(wave_dev);
  			}
  
  			woinst->mmapped = 0;
  			woinst->total_copied = 0;
  			woinst->total_played = 0;
  			woinst->blocks = 0;
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		if (file->f_mode & FMODE_READ) {
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			if (wiinst->state & WAVE_STATE_OPEN) {
  				emu10k1_wavein_close(wave_dev);
  			}
  
  			wiinst->mmapped = 0;
  			wiinst->total_recorded = 0;
  			wiinst->blocks = 0;
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  		}
  
  		break;
  
  	case SNDCTL_DSP_SETDUPLEX:
  		DPF(2, "SNDCTL_DSP_SETDUPLEX:\n");
  		break;
  
  	case SNDCTL_DSP_GETCAPS:
  		DPF(2, "SNDCTL_DSP_GETCAPS:\n");
  		return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
  				DSP_CAP_TRIGGER | DSP_CAP_MMAP |
  				DSP_CAP_COPROC| DSP_CAP_MULTI, p);
  	case SNDCTL_DSP_SPEED:
  		DPF(2, "SNDCTL_DSP_SPEED:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		DPD(2, "val is %d\n", val);
  
  		if (val > 0) {
  			if (file->f_mode & FMODE_READ) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&wiinst->lock, flags);
  
  				format = wiinst->format;
  				format.samplingrate = val;
  
  				if (emu10k1_wavein_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&wiinst->lock, flags);
  					return -EINVAL;
  				}
  
  				val = wiinst->format.samplingrate;
  
  				spin_unlock_irqrestore(&wiinst->lock, flags);
  
  				DPD(2, "set recording sampling rate -> %d\n", val);
  			}
  
  			if (file->f_mode & FMODE_WRITE) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&woinst->lock, flags);
  
  				format = woinst->format;
  				format.samplingrate = val;
  
  				if (emu10k1_waveout_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&woinst->lock, flags);
  					return -EINVAL;
  				}
  
  				val = woinst->format.samplingrate;
  
  				spin_unlock_irqrestore(&woinst->lock, flags);
  
  				DPD(2, "set playback sampling rate -> %d\n", val);
  			}
  
  			return put_user(val, p);
  		} else {
  			if (file->f_mode & FMODE_READ)
  				val = wiinst->format.samplingrate;
  			else if (file->f_mode & FMODE_WRITE)
  				val = woinst->format.samplingrate;
  
  			return put_user(val, p);
  		}
  		break;
  
  	case SNDCTL_DSP_STEREO:
  		DPF(2, "SNDCTL_DSP_STEREO:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		DPD(2, " val is %d\n", val);
  
  		if (file->f_mode & FMODE_READ) {
  			struct wave_format format;
  
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			format = wiinst->format;
  			format.channels = val ? 2 : 1;
  
  			if (emu10k1_wavein_setformat(wave_dev, &format) < 0) {
  				spin_unlock_irqrestore(&wiinst->lock, flags);
  				return -EINVAL;
  			}
  
  			val = wiinst->format.channels - 1;
  
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  			DPD(2, "set recording stereo -> %d\n", val);
  		}
  
  		if (file->f_mode & FMODE_WRITE) {
  			struct wave_format format;
  
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			format = woinst->format;
  			format.channels = val ? 2 : 1;
  
  			if (emu10k1_waveout_setformat(wave_dev, &format) < 0) {
  				spin_unlock_irqrestore(&woinst->lock, flags);
  				return -EINVAL;
  			}
  
  			val = woinst->format.channels - 1;
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  
  			DPD(2, "set playback stereo -> %d\n", val);
  		}
  
  		return put_user(val, p);
  
  		break;
  
  	case SNDCTL_DSP_CHANNELS:
  		DPF(2, "SNDCTL_DSP_CHANNELS:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		DPD(2, " val is %d\n", val);
  
  		if (val > 0) {
  			if (file->f_mode & FMODE_READ) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&wiinst->lock, flags);
  
  				format = wiinst->format;
  				format.channels = val;
  
  				if (emu10k1_wavein_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&wiinst->lock, flags);
  					return -EINVAL;
  				}
  				val = wiinst->format.channels;
  
  				spin_unlock_irqrestore(&wiinst->lock, flags);
  				DPD(2, "set recording number of channels -> %d\n", val);
  			}
  
  			if (file->f_mode & FMODE_WRITE) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&woinst->lock, flags);
  
  				format = woinst->format;
  				format.channels = val;
  
  				if (emu10k1_waveout_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&woinst->lock, flags);
  					return -EINVAL;
  				}
  
  				val = woinst->format.channels;
  
  				spin_unlock_irqrestore(&woinst->lock, flags);
  				DPD(2, "set playback number of channels -> %d\n", val);
  			}
  
  			return put_user(val, p);
  		} else {
  			if (file->f_mode & FMODE_READ)
  				val = wiinst->format.channels;
  			else if (file->f_mode & FMODE_WRITE)
  				val = woinst->format.channels;
  
  			return put_user(val, p);
  		}
  		break;
  
  	case SNDCTL_DSP_GETFMTS:
  		DPF(2, "SNDCTL_DSP_GETFMTS:\n");
  
  		if (file->f_mode & FMODE_READ)
  			val = AFMT_S16_LE;
  		else if (file->f_mode & FMODE_WRITE) {
  			val = AFMT_S16_LE | AFMT_U8;
  			if (emu10k1_find_control_gpr(&wave_dev->card->mgr,
  						     wave_dev->card->pt.patch_name, 
  						     wave_dev->card->pt.enable_gpr_name) >= 0)
  				val |= AFMT_AC3;
  		}
  		return put_user(val, p);
  
  	case SNDCTL_DSP_SETFMT:	/* Same as SNDCTL_DSP_SAMPLESIZE */
  		DPF(2, "SNDCTL_DSP_SETFMT:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		DPD(2, " val is %d\n", val);
  
  		if (val != AFMT_QUERY) {
  			if (file->f_mode & FMODE_READ) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&wiinst->lock, flags);
  
  				format = wiinst->format;
  				format.id = val;
  
  				if (emu10k1_wavein_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&wiinst->lock, flags);
  					return -EINVAL;
  				}
  
  				val = wiinst->format.id;
  
  				spin_unlock_irqrestore(&wiinst->lock, flags);
  				DPD(2, "set recording format -> %d\n", val);
  			}
  
  			if (file->f_mode & FMODE_WRITE) {
  				struct wave_format format;
  
  				spin_lock_irqsave(&woinst->lock, flags);
  
  				format = woinst->format;
  				format.id = val;
  
  				if (emu10k1_waveout_setformat(wave_dev, &format) < 0) {
  					spin_unlock_irqrestore(&woinst->lock, flags);
  					return -EINVAL;
  				}
  
  				val = woinst->format.id;
  
  				spin_unlock_irqrestore(&woinst->lock, flags);
  				DPD(2, "set playback format -> %d\n", val);
  			}
  
  			return put_user(val, p);
  		} else {
  			if (file->f_mode & FMODE_READ)
  				val = wiinst->format.id;
  			else if (file->f_mode & FMODE_WRITE)
  				val = woinst->format.id;
  
  			return put_user(val, p);
  		}
  		break;
  
  	case SOUND_PCM_READ_BITS:
  
  		if (file->f_mode & FMODE_READ)
  			val = wiinst->format.bitsperchannel;
  		else if (file->f_mode & FMODE_WRITE)
  			val = woinst->format.bitsperchannel;
  
  		return put_user(val, p);
  
  	case SOUND_PCM_READ_RATE:
  
  		if (file->f_mode & FMODE_READ)
  			val = wiinst->format.samplingrate;
  		else if (file->f_mode & FMODE_WRITE)
  			val = woinst->format.samplingrate;
  
  		return put_user(val, p);
  
  	case SOUND_PCM_READ_CHANNELS:
  
  		if (file->f_mode & FMODE_READ)
  			val = wiinst->format.channels;
  		else if (file->f_mode & FMODE_WRITE)
  			val = woinst->format.channels;
  
  		return put_user(val, p);
  
  	case SOUND_PCM_WRITE_FILTER:
  		DPF(2, "SOUND_PCM_WRITE_FILTER: not implemented\n");
  		break;
  
  	case SOUND_PCM_READ_FILTER:
  		DPF(2, "SOUND_PCM_READ_FILTER: not implemented\n");
  		break;
  
  	case SNDCTL_DSP_SETSYNCRO:
  		DPF(2, "SNDCTL_DSP_SETSYNCRO: not implemented\n");
  		break;
  
  	case SNDCTL_DSP_GETTRIGGER:
  		DPF(2, "SNDCTL_DSP_GETTRIGGER:\n");
  
  		if (file->f_mode & FMODE_WRITE && (wave_dev->enablebits & PCM_ENABLE_OUTPUT))
  			val |= PCM_ENABLE_OUTPUT;
  
  		if (file->f_mode & FMODE_READ && (wave_dev->enablebits & PCM_ENABLE_INPUT))
  			val |= PCM_ENABLE_INPUT;
  
  		return put_user(val, p);
  
  	case SNDCTL_DSP_SETTRIGGER:
  		DPF(2, "SNDCTL_DSP_SETTRIGGER:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		if (file->f_mode & FMODE_WRITE) {
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (val & PCM_ENABLE_OUTPUT) {
  				wave_dev->enablebits |= PCM_ENABLE_OUTPUT;
  				if (woinst->state & WAVE_STATE_OPEN)
  					emu10k1_waveout_start(wave_dev);
  			} else {
  				wave_dev->enablebits &= ~PCM_ENABLE_OUTPUT;
  				if (woinst->state & WAVE_STATE_STARTED)
  					emu10k1_waveout_stop(wave_dev);
  			}
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		if (file->f_mode & FMODE_READ) {
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			if (val & PCM_ENABLE_INPUT) {
  				wave_dev->enablebits |= PCM_ENABLE_INPUT;
  				if (wiinst->state & WAVE_STATE_OPEN)
  					emu10k1_wavein_start(wave_dev);
  			} else {
  				wave_dev->enablebits &= ~PCM_ENABLE_INPUT;
  				if (wiinst->state & WAVE_STATE_STARTED)
  					emu10k1_wavein_stop(wave_dev);
  			}
  
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  		}
  		break;
  
  	case SNDCTL_DSP_GETOSPACE:
  		{
  			audio_buf_info info;
  
  			DPF(4, "SNDCTL_DSP_GETOSPACE:\n");
  
  			if (!(file->f_mode & FMODE_WRITE))
  				return -EINVAL;
  
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (woinst->state & WAVE_STATE_OPEN) {
  				emu10k1_waveout_update(woinst);
  				emu10k1_waveout_getxfersize(woinst, &bytestocopy);
  				info.bytes = bytestocopy;
  			} else {
  				calculate_ofrag(woinst);
  				info.bytes = woinst->buffer.size;
  			}
  			spin_unlock_irqrestore(&woinst->lock, flags);
  
  			info.bytes *= woinst->num_voices;
  			info.fragsize = woinst->buffer.fragment_size * woinst->num_voices;
  			info.fragstotal = woinst->buffer.numfrags * woinst->num_voices;
  			info.fragments = info.bytes / info.fragsize;
  
  			if (copy_to_user(p, &info, sizeof(info)))
  				return -EFAULT;
  		}
  		break;
  
  	case SNDCTL_DSP_GETISPACE:
  		{
  			audio_buf_info info;
  
  			DPF(4, "SNDCTL_DSP_GETISPACE:\n");
  
  			if (!(file->f_mode & FMODE_READ))
  				return -EINVAL;
  
  			spin_lock_irqsave(&wiinst->lock, flags);
  			if (wiinst->state & WAVE_STATE_OPEN) {
  				emu10k1_wavein_update(wave_dev->card, wiinst);
  				emu10k1_wavein_getxfersize(wiinst, &bytestocopy);
  				info.bytes = bytestocopy;
  			} else {
  				calculate_ifrag(wiinst);
  				info.bytes = 0;
  			}
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  
  			info.fragstotal = wiinst->buffer.numfrags;
  			info.fragments = info.bytes / wiinst->buffer.fragment_size;
  			info.fragsize = wiinst->buffer.fragment_size;
  
  			if (copy_to_user(p, &info, sizeof(info)))
  				return -EFAULT;
  		}
  		break;
  
  	case SNDCTL_DSP_NONBLOCK:
  		DPF(2, "SNDCTL_DSP_NONBLOCK:\n");
  
  		file->f_flags |= O_NONBLOCK;
  		break;
  
  	case SNDCTL_DSP_GETODELAY:
  		DPF(4, "SNDCTL_DSP_GETODELAY:\n");
  
  		if (!(file->f_mode & FMODE_WRITE))
  			return -EINVAL;
  
  		spin_lock_irqsave(&woinst->lock, flags);
  		if (woinst->state & WAVE_STATE_OPEN) {
  			emu10k1_waveout_update(woinst);
  			emu10k1_waveout_getxfersize(woinst, &bytestocopy);
  			val = woinst->buffer.size - bytestocopy;
  		} else
  			val = 0;
  
  		val *= woinst->num_voices;
  		spin_unlock_irqrestore(&woinst->lock, flags);
  
  		return put_user(val, p);
  
  	case SNDCTL_DSP_GETIPTR:
  		{
  			count_info cinfo;
  
  			DPF(4, "SNDCTL_DSP_GETIPTR: \n");
  
  			if (!(file->f_mode & FMODE_READ))
  				return -EINVAL;
  
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			if (wiinst->state & WAVE_STATE_OPEN) {
  				emu10k1_wavein_update(wave_dev->card, wiinst);
  				cinfo.ptr = wiinst->buffer.hw_pos;
  				cinfo.bytes = cinfo.ptr + wiinst->total_recorded - wiinst->total_recorded % wiinst->buffer.size;
  				cinfo.blocks = cinfo.bytes / wiinst->buffer.fragment_size - wiinst->blocks;
  				wiinst->blocks = cinfo.bytes / wiinst->buffer.fragment_size;
  			} else {
  				cinfo.ptr = 0;
  				cinfo.bytes = 0;
  				cinfo.blocks = 0;
  			}
  
  			if (wiinst->mmapped)
  				wiinst->buffer.bytestocopy %= wiinst->buffer.fragment_size;
  
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  
  			if (copy_to_user(p, &cinfo, sizeof(cinfo)))
  				return -EFAULT;
  		}
  		break;
  
  	case SNDCTL_DSP_GETOPTR:
  		{
  			count_info cinfo;
  
  			DPF(4, "SNDCTL_DSP_GETOPTR:\n");
  
  			if (!(file->f_mode & FMODE_WRITE))
  				return -EINVAL;
  
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (woinst->state & WAVE_STATE_OPEN || 
  			    ((woinst->format.passthrough == 1) && wave_dev->card->pt.state)) {
  				int num_fragments;
  
  				if (woinst->format.passthrough == 1) {
  					emu10k1_pt_waveout_update(wave_dev);
  					cinfo.bytes = woinst->total_played;
  				} else {
  					emu10k1_waveout_update(woinst);
  					cinfo.bytes = woinst->total_played;
  				}
  
  				cinfo.ptr = woinst->buffer.hw_pos;
  				num_fragments = cinfo.bytes / woinst->buffer.fragment_size;
  				cinfo.blocks = num_fragments - woinst->blocks;
  				woinst->blocks = num_fragments;
  
  				cinfo.bytes *= woinst->num_voices;
  				cinfo.ptr *= woinst->num_voices;
  			} else {
  				cinfo.ptr = 0;
  				cinfo.bytes = 0;
  				cinfo.blocks = 0;
  			}
  
  			if (woinst->mmapped)
  				woinst->buffer.free_bytes %= woinst->buffer.fragment_size;
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  
  			if (copy_to_user(p, &cinfo, sizeof(cinfo)))
  				return -EFAULT;
  		}
  		break;
  
  	case SNDCTL_DSP_GETBLKSIZE:
  		DPF(2, "SNDCTL_DSP_GETBLKSIZE:\n");
  
  		if (file->f_mode & FMODE_WRITE) {
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			calculate_ofrag(woinst);
  			val = woinst->buffer.fragment_size * woinst->num_voices;
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		if (file->f_mode & FMODE_READ) {
  			spin_lock_irqsave(&wiinst->lock, flags);
  
  			calculate_ifrag(wiinst);
  			val = wiinst->buffer.fragment_size;
  
  			spin_unlock_irqrestore(&wiinst->lock, flags);
  		}
  
  		return put_user(val, p);
  
  		break;
  
  	case SNDCTL_DSP_POST:
  		if (file->f_mode & FMODE_WRITE) {
  			spin_lock_irqsave(&woinst->lock, flags);
  
  			if (!(woinst->state & WAVE_STATE_STARTED)
  			    && (wave_dev->enablebits & PCM_ENABLE_OUTPUT)
  			    && (woinst->total_copied > 0))
  				emu10k1_waveout_start(wave_dev);
  
  			spin_unlock_irqrestore(&woinst->lock, flags);
  		}
  
  		break;
  
  	case SNDCTL_DSP_SUBDIVIDE:
  		DPF(2, "SNDCTL_DSP_SUBDIVIDE: not implemented\n");
  		break;
  
  	case SNDCTL_DSP_SETFRAGMENT:
  		DPF(2, "SNDCTL_DSP_SETFRAGMENT:\n");
  
  		if (get_user(val, p))
  			return -EFAULT;
  
  		DPD(2, "val is %#x\n", val);
  
  		if (val == 0)
  			return -EIO;
  
  		if (file->f_mode & FMODE_WRITE) {
  			/* digital pass-through fragment count and size are fixed values */
  			if (woinst->state & WAVE_STATE_OPEN || (woinst->format.passthrough == 1))
  				return -EINVAL;	/* too late to change */
  
  			woinst->buffer.ossfragshift = val & 0xffff;
  			woinst->buffer.numfrags = (val >> 16) & 0xffff;
  		}
  
  		if (file->f_mode & FMODE_READ) {
  			if (wiinst->state & WAVE_STATE_OPEN)
  				return -EINVAL;	/* too late to change */
  
  			wiinst->buffer.ossfragshift = val & 0xffff;
  			wiinst->buffer.numfrags = (val >> 16) & 0xffff;
  		}
  
  		break;
  
  	case SNDCTL_COPR_LOAD:
  		{
  			copr_buffer *buf;
  			u32 i;
  
  			DPF(4, "SNDCTL_COPR_LOAD:\n");
  
  			buf = kmalloc(sizeof(copr_buffer), GFP_KERNEL);
  			if (!buf)
  				return -ENOMEM;
  
  			if (copy_from_user(buf, p, sizeof(copr_buffer))) {
  				kfree (buf);
  				return -EFAULT;
  			}
  
  			if ((buf->command != CMD_READ) && (buf->command != CMD_WRITE)) {
  				kfree (buf);
  				return -EINVAL;
  			}
  
  			if (buf->command == CMD_WRITE) {
  				
  #ifdef DBGEMU
  				if ((buf->offs < 0) || (buf->offs + buf->len > 0xe00) || (buf->len > 1000)) {
  #else
  				if (((buf->offs < 0x100) || (buf->offs + buf->len > (wave_dev->card->is_audigy ? 0xe00 : 0x800)) || (buf->len > 1000)
  				) && !(
  					//any register allowed raw access to users goes here:
  					(buf->offs == DBG ||
  					  buf->offs == A_DBG)
  					&& (buf->len == 1))) {
  #endif		
  					kfree(buf);
  					return -EINVAL;
  				}
  			} else {
  				if ((buf->offs < 0) || (buf->offs + buf->len > 0xe00) || (buf->len > 1000)) {
  					kfree(buf);
  					return -EINVAL;
  				}
  			}			
  				
  			if (((unsigned)buf->flags) > 0x3f)
  				buf->flags = 0;
  
  			if (buf->command == CMD_READ) {
  				for (i = 0; i < buf->len; i++)
  					((u32 *) buf->data)[i] = sblive_readptr(wave_dev->card, buf->offs + i, buf->flags);
  
  				if (copy_to_user(p, buf, sizeof(copr_buffer))) {
  					kfree(buf);
  					return -EFAULT;
  				}
  			} else {
  				for (i = 0; i < buf->len; i++)
  					sblive_writeptr(wave_dev->card, buf->offs + i, buf->flags, ((u32 *) buf->data)[i]);
  			}
  
  			kfree (buf);
  			break;
  		}
  
  	default:		/* Default is unrecognized command */
  		DPD(2, "default: %#x\n", cmd);
  		return -EINVAL;
  	}
  	return 0;
  }
  
  static struct page *emu10k1_mm_nopage (struct vm_area_struct * vma, unsigned long address, int *type)
  {
  	struct emu10k1_wavedevice *wave_dev = vma->vm_private_data;
  	struct woinst *woinst = wave_dev->woinst;
  	struct wiinst *wiinst = wave_dev->wiinst;
  	struct page *dmapage;
  	unsigned long pgoff;
  	int rd, wr;
  
  	DPF(3, "emu10k1_mm_nopage()\n");
  	DPD(3, "addr: %#lx\n", address);
  
  	if (address > vma->vm_end) {
  		DPF(1, "EXIT, returning NOPAGE_SIGBUS\n");
  		return NOPAGE_SIGBUS; /* Disallow mremap */
  	}
  
  	pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
  	if (woinst != NULL)
  		wr = woinst->mmapped;
  	else
  		wr = 0;
  
  	if (wiinst != NULL)
  		rd = wiinst->mmapped;
  	else
  		rd = 0;
  
  	/* if full-duplex (read+write) and we have two sets of bufs,
  	* then the playback buffers come first, sez soundcard.c */
  	if (wr) {
  		if (pgoff >= woinst->buffer.pages) {
  			pgoff -= woinst->buffer.pages;
  			dmapage = virt_to_page ((u8 *) wiinst->buffer.addr + pgoff * PAGE_SIZE);
  		} else
  			dmapage = virt_to_page (woinst->voice[0].mem.addr[pgoff]);
  	} else {
  		dmapage = virt_to_page ((u8 *) wiinst->buffer.addr + pgoff * PAGE_SIZE);
  	}
  
  	get_page (dmapage);
  
  	DPD(3, "page: %#lx\n", (unsigned long) dmapage);
  	if (type)
  		*type = VM_FAULT_MINOR;
  	return dmapage;
  }
  
  static struct vm_operations_struct emu10k1_mm_ops = {
  	.nopage         = emu10k1_mm_nopage,
  };
  
  static int emu10k1_audio_mmap(struct file *file, struct vm_area_struct *vma)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	unsigned long max_pages, n_pages, pgoffset;
  	struct woinst *woinst = NULL;
  	struct wiinst *wiinst = NULL;
  	unsigned long flags;
  
  	DPF(2, "emu10k1_audio_mmap()\n");
  
  	max_pages = 0;
  	if (vma->vm_flags & VM_WRITE) {
  		woinst = wave_dev->woinst;
  
  		spin_lock_irqsave(&woinst->lock, flags);
  
  		/* No m'mapping possible for multichannel */
  		if (woinst->num_voices > 1) {
  			spin_unlock_irqrestore(&woinst->lock, flags);
                  	return -EINVAL;
  		}
  
  		if (woinst->state == WAVE_STATE_CLOSED) {
  			calculate_ofrag(woinst);
  
  			if (emu10k1_waveout_open(wave_dev) < 0) {
  				spin_unlock_irqrestore(&woinst->lock, flags);
  				ERROR();
  				return -EINVAL;
  			}
  		}
  
  		woinst->mmapped = 1;
  		max_pages += woinst->buffer.pages;
  		spin_unlock_irqrestore(&woinst->lock, flags);
  	}
  
  	if (vma->vm_flags & VM_READ) {
  		wiinst = wave_dev->wiinst;
  
  		spin_lock_irqsave(&wiinst->lock, flags);
  		if (wiinst->state == WAVE_STATE_CLOSED) {
  			calculate_ifrag(wiinst);
  
  			if (emu10k1_wavein_open(wave_dev) < 0) {
  				spin_unlock_irqrestore(&wiinst->lock, flags);
  				ERROR();
  				return -EINVAL;
  			}
  		}
  
  		wiinst->mmapped = 1;
  		max_pages += wiinst->buffer.pages;
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  	}
  
  	n_pages = ((vma->vm_end - vma->vm_start) + PAGE_SIZE - 1) >> PAGE_SHIFT;
  	pgoffset = vma->vm_pgoff;
  
  	DPD(2, "vma_start: %#lx, vma_end: %#lx, vma_offset: %ld\n", vma->vm_start, vma->vm_end, pgoffset);
  	DPD(2, "n_pages: %ld, max_pages: %ld\n", n_pages, max_pages);
  
  	if (pgoffset + n_pages > max_pages)
  		return -EINVAL;
  
  	vma->vm_flags |= VM_RESERVED;
  	vma->vm_ops = &emu10k1_mm_ops;
  	vma->vm_private_data = wave_dev;
  	return 0;
  }
  
  static int emu10k1_audio_open(struct inode *inode, struct file *file)
  {
  	int minor = iminor(inode);
  	struct emu10k1_card *card = NULL;
  	struct list_head *entry;
  	struct emu10k1_wavedevice *wave_dev;
  
  	DPF(2, "emu10k1_audio_open()\n");
  
  	/* Check for correct device to open */
  
  	list_for_each(entry, &emu10k1_devs) {
  		card = list_entry(entry, struct emu10k1_card, list);
  
  		if (!((card->audio_dev ^ minor) & ~0xf) || !((card->audio_dev1 ^ minor) & ~0xf))
  			goto match;
  	}
  
  	return -ENODEV;
  
  match:
  
  	wave_dev = (struct emu10k1_wavedevice *) kmalloc(sizeof(struct emu10k1_wavedevice), GFP_KERNEL);
  
  	if (wave_dev == NULL) { 
  		ERROR();
  		return -ENOMEM;
  	}
  
  	wave_dev->card = card;
  	wave_dev->wiinst = NULL;
  	wave_dev->woinst = NULL;
  	wave_dev->enablebits = PCM_ENABLE_OUTPUT | PCM_ENABLE_INPUT;	/* Default */
  
  	if (file->f_mode & FMODE_READ) {
  		/* Recording */
  		struct wiinst *wiinst;
  
  		if ((wiinst = (struct wiinst *) kmalloc(sizeof(struct wiinst), GFP_KERNEL)) == NULL) {
  			ERROR();
  			kfree(wave_dev);
  			return -ENOMEM;
  		}
  
  		wiinst->recsrc = card->wavein.recsrc;
                  wiinst->fxwc = card->wavein.fxwc;
  
  		switch (wiinst->recsrc) {
  		case WAVERECORD_AC97:
  			wiinst->format.id = AFMT_S16_LE;
  			wiinst->format.samplingrate = 8000;
  			wiinst->format.bitsperchannel = 16;
  			wiinst->format.channels = 1;
  			break;
  		case WAVERECORD_MIC:
  			wiinst->format.id = AFMT_S16_LE;
  			wiinst->format.samplingrate = 8000;
  			wiinst->format.bitsperchannel = 16;
  			wiinst->format.channels = 1;
  			break;
  		case WAVERECORD_FX:
  			wiinst->format.id = AFMT_S16_LE;
  			wiinst->format.samplingrate = 48000;
  			wiinst->format.bitsperchannel = 16;
  			wiinst->format.channels = hweight32(wiinst->fxwc);
  			break;
  		default:
  			kfree(wave_dev);
  			kfree(wiinst);
  			BUG();
  			break;
  		}
  
  		wiinst->state = WAVE_STATE_CLOSED;
  
  		wiinst->buffer.ossfragshift = 0;
  		wiinst->buffer.fragment_size = 0;
  		wiinst->buffer.numfrags = 0;
  
  		init_waitqueue_head(&wiinst->wait_queue);
  
  		wiinst->mmapped = 0;
  		wiinst->total_recorded = 0;
  		wiinst->blocks = 0;
  		spin_lock_init(&wiinst->lock);
  		tasklet_init(&wiinst->timer.tasklet, emu10k1_wavein_bh, (unsigned long) wave_dev);
  		wave_dev->wiinst = wiinst;
  		emu10k1_wavein_setformat(wave_dev, &wiinst->format);
  	}
  
  	if (file->f_mode & FMODE_WRITE) {
  		struct woinst *woinst;
  		int i;
  
  		if ((woinst = (struct woinst *) kmalloc(sizeof(struct woinst), GFP_KERNEL)) == NULL) {
  			ERROR();
  			kfree(wave_dev);
  			return -ENOMEM;
  		}
  
  		if (wave_dev->wiinst != NULL) {
  			woinst->format = wave_dev->wiinst->format;
  		} else {
  			woinst->format.id = AFMT_U8;
  			woinst->format.samplingrate = 8000;
  			woinst->format.bitsperchannel = 8;
  			woinst->format.channels = 1;
  		}
  
  		woinst->state = WAVE_STATE_CLOSED;
  
  		woinst->buffer.fragment_size = 0;
  		woinst->buffer.ossfragshift = 0;
  		woinst->buffer.numfrags = 0;
  		woinst->device = (card->audio_dev1 == minor);
  		woinst->timer.state = TIMER_STATE_UNINSTALLED;
  		woinst->num_voices = 1;
  		for (i = 0; i < WAVEOUT_MAXVOICES; i++) {
  			woinst->voice[i].usage = VOICE_USAGE_FREE;
  			woinst->voice[i].mem.emupageindex = -1;
  		}
  
  		init_waitqueue_head(&woinst->wait_queue);
  
  		woinst->mmapped = 0;
  		woinst->total_copied = 0;
  		woinst->total_played = 0;
  		woinst->blocks = 0;
  		spin_lock_init(&woinst->lock);
  		tasklet_init(&woinst->timer.tasklet, emu10k1_waveout_bh, (unsigned long) wave_dev);
  		wave_dev->woinst = woinst;
  		emu10k1_waveout_setformat(wave_dev, &woinst->format);
  	}
  
  	file->private_data = (void *) wave_dev;
  
  	return nonseekable_open(inode, file);
  }
  
  static int emu10k1_audio_release(struct inode *inode, struct file *file)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	struct emu10k1_card *card;
  	unsigned long flags;
  
  	card = wave_dev->card;
  
  	DPF(2, "emu10k1_audio_release()\n");
  
  	if (file->f_mode & FMODE_WRITE) {
  		struct woinst *woinst = wave_dev->woinst;
  
  		spin_lock_irqsave(&woinst->lock, flags);
  		if(woinst->format.passthrough==2)
  			card->pt.state=PT_STATE_PLAYING;
  		if (woinst->format.passthrough && card->pt.state != PT_STATE_INACTIVE){
  			spin_lock(&card->pt.lock);
                          emu10k1_pt_stop(card);
  			spin_unlock(&card->pt.lock);
  		}
  		if (woinst->state & WAVE_STATE_OPEN) {
  			if (woinst->state & WAVE_STATE_STARTED) {
  				if (!(file->f_flags & O_NONBLOCK)) {
  					while (!signal_pending(current)
  					       && (woinst->total_played < woinst->total_copied)) {
  						DPF(4, "Buffer hasn't been totally played, sleep....\n");
  						spin_unlock_irqrestore(&woinst->lock, flags);
  						interruptible_sleep_on(&woinst->wait_queue);
  						spin_lock_irqsave(&woinst->lock, flags);
  					}
  				}
  			}
  			emu10k1_waveout_close(wave_dev);
  		}
  
  		spin_unlock_irqrestore(&woinst->lock, flags);
  		/* remove the tasklet */
  		tasklet_kill(&woinst->timer.tasklet);
  		kfree(wave_dev->woinst);
  	}
  
  	if (file->f_mode & FMODE_READ) {
  		struct wiinst *wiinst = wave_dev->wiinst;
  
  		spin_lock_irqsave(&wiinst->lock, flags);
  
  		if (wiinst->state & WAVE_STATE_OPEN) {
  			emu10k1_wavein_close(wave_dev);
  		}
  
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  		tasklet_kill(&wiinst->timer.tasklet);
  		kfree(wave_dev->wiinst);
  	}
  
  	kfree(wave_dev);
  
  	if (waitqueue_active(&card->open_wait))
  		wake_up_interruptible(&card->open_wait);
  
  	return 0;
  }
  
  /* FIXME sort out poll() + mmap() */
  static unsigned int emu10k1_audio_poll(struct file *file, struct poll_table_struct *wait)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) file->private_data;
  	struct woinst *woinst = wave_dev->woinst;
  	struct wiinst *wiinst = wave_dev->wiinst;
  	unsigned int mask = 0;
  	u32 bytestocopy;
  	unsigned long flags;
  
  	DPF(4, "emu10k1_audio_poll()\n");
  
  	if (file->f_mode & FMODE_WRITE)
  		poll_wait(file, &woinst->wait_queue, wait);
  
  	if (file->f_mode & FMODE_READ)
  		poll_wait(file, &wiinst->wait_queue, wait);
  
  	if (file->f_mode & FMODE_WRITE) {
  		spin_lock_irqsave(&woinst->lock, flags);
  
  		if (woinst->state & WAVE_STATE_OPEN) {
  			emu10k1_waveout_update(woinst);
  			emu10k1_waveout_getxfersize(woinst, &bytestocopy);
  
  			if (bytestocopy >= woinst->buffer.fragment_size)
  				mask |= POLLOUT | POLLWRNORM;
  		} else
  			mask |= POLLOUT | POLLWRNORM;
  
  		spin_unlock_irqrestore(&woinst->lock, flags);
  	}
  
  	if (file->f_mode & FMODE_READ) {
  		spin_lock_irqsave(&wiinst->lock, flags);
  
  		if (wiinst->state & WAVE_STATE_OPEN) {
  			emu10k1_wavein_update(wave_dev->card, wiinst);
  			emu10k1_wavein_getxfersize(wiinst, &bytestocopy);
  
  			if (bytestocopy >= wiinst->buffer.fragment_size)
  				mask |= POLLIN | POLLRDNORM;
  		}
  
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  	}
  
  	return mask;
  }
  
  static void calculate_ofrag(struct woinst *woinst)
  {
  	struct waveout_buffer *buffer = &woinst->buffer;
  	u32 fragsize;
  
  	if (buffer->fragment_size)
  		return;
  
  	if (!buffer->ossfragshift) {
  		fragsize = (woinst->format.bytespervoicesample * woinst->format.samplingrate * WAVEOUT_DEFAULTFRAGLEN) / 1000 - 1;
  
  		while (fragsize) {
  			fragsize >>= 1;
  			buffer->ossfragshift++;
  		}
  	}
  
  	if (buffer->ossfragshift < WAVEOUT_MINFRAGSHIFT)
  		buffer->ossfragshift = WAVEOUT_MINFRAGSHIFT;
  
  	buffer->fragment_size = 1 << buffer->ossfragshift;
  
  	while (buffer->fragment_size * WAVEOUT_MINFRAGS > WAVEOUT_MAXBUFSIZE)
  		buffer->fragment_size >>= 1;
  
  	/* now we are sure that:
  	 (2^WAVEOUT_MINFRAGSHIFT) <= (fragment_size = 2^n) <= (WAVEOUT_MAXBUFSIZE / WAVEOUT_MINFRAGS)
  	*/
  
  	if (!buffer->numfrags) {
  		u32 numfrags;
  
  		numfrags = (woinst->format.bytespervoicesample * woinst->format.samplingrate * WAVEOUT_DEFAULTBUFLEN) /
  			   (buffer->fragment_size * 1000) - 1;
  
  		buffer->numfrags = 1;
  
  		while (numfrags) {
  			numfrags >>= 1;
  			buffer->numfrags <<= 1;
  		}
  	}
  
  	if (buffer->numfrags < WAVEOUT_MINFRAGS)
  		buffer->numfrags = WAVEOUT_MINFRAGS;
  
  	if (buffer->numfrags * buffer->fragment_size > WAVEOUT_MAXBUFSIZE)
  		buffer->numfrags = WAVEOUT_MAXBUFSIZE / buffer->fragment_size;
  
  	if (buffer->numfrags < WAVEOUT_MINFRAGS)
  		BUG();
  
  	buffer->size = buffer->fragment_size * buffer->numfrags;
  	buffer->pages = buffer->size / PAGE_SIZE + ((buffer->size % PAGE_SIZE) ? 1 : 0);
  
  	DPD(2, " calculated playback fragment_size -> %d\n", buffer->fragment_size);
  	DPD(2, " calculated playback numfrags -> %d\n", buffer->numfrags);
  
  	return;
  }
  
  static void calculate_ifrag(struct wiinst *wiinst)
  {
  	struct wavein_buffer *buffer = &wiinst->buffer;
  	u32 fragsize, bufsize, size[4];
  	int i, j;
  
  	if (buffer->fragment_size)
  		return;
  
  	if (!buffer->ossfragshift) {
  		fragsize = (wiinst->format.bytespersec * WAVEIN_DEFAULTFRAGLEN) / 1000 - 1;
  
  		while (fragsize) {
  			fragsize >>= 1;
  			buffer->ossfragshift++;
  		}
  	}
  
  	if (buffer->ossfragshift < WAVEIN_MINFRAGSHIFT)
  		buffer->ossfragshift = WAVEIN_MINFRAGSHIFT;
  
  	buffer->fragment_size = 1 << buffer->ossfragshift;
  
  	while (buffer->fragment_size * WAVEIN_MINFRAGS > WAVEIN_MAXBUFSIZE)
  		buffer->fragment_size >>= 1;
  
  	/* now we are sure that:
  	   (2^WAVEIN_MINFRAGSHIFT) <= (fragment_size = 2^n) <= (WAVEIN_MAXBUFSIZE / WAVEIN_MINFRAGS)
          */
  
  
  	if (!buffer->numfrags)
  		buffer->numfrags = (wiinst->format.bytespersec * WAVEIN_DEFAULTBUFLEN) / (buffer->fragment_size * 1000) - 1;
  
  	if (buffer->numfrags < WAVEIN_MINFRAGS)
  		buffer->numfrags = WAVEIN_MINFRAGS;
  
  	if (buffer->numfrags * buffer->fragment_size > WAVEIN_MAXBUFSIZE)
  		buffer->numfrags = WAVEIN_MAXBUFSIZE / buffer->fragment_size;
  
  	if (buffer->numfrags < WAVEIN_MINFRAGS)
  		BUG();
  
  	bufsize = buffer->fragment_size * buffer->numfrags;
  
  	/* the buffer size for recording is restricted to certain values, adjust it now */
  	if (bufsize >= 0x10000) {
  		buffer->size = 0x10000;
  		buffer->sizeregval = 0x1f;
  	} else {
  		buffer->size = 0;
  		size[0] = 384;
  		size[1] = 448;
  		size[2] = 512;
  		size[3] = 640;
  
  		for (i = 0; i < 8; i++)
  			for (j = 0; j < 4; j++)
  				if (bufsize >= size[j]) {
  					buffer->size = size[j];
  					size[j] *= 2;
  					buffer->sizeregval = i * 4 + j + 1;
  				} else
  					goto exitloop;
  	      exitloop:
  		if (buffer->size == 0) {
  			buffer->size = 384;
  			buffer->sizeregval = 0x01;
  		}
  	}
  
  	/* adjust the fragment size so that buffer size is an integer multiple */
  	while (buffer->size % buffer->fragment_size)
  		buffer->fragment_size >>= 1;
  
  	buffer->numfrags = buffer->size / buffer->fragment_size;
  	buffer->pages =  buffer->size / PAGE_SIZE + ((buffer->size % PAGE_SIZE) ? 1 : 0);
  
  	DPD(2, " calculated recording fragment_size -> %d\n", buffer->fragment_size);
  	DPD(2, " calculated recording numfrags -> %d\n", buffer->numfrags);
  	DPD(2, " buffer size register -> %#04x\n", buffer->sizeregval);
  
  	return;
  }
  
  static void emu10k1_wavein_bh(unsigned long refdata)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) refdata;
  	struct wiinst *wiinst = wave_dev->wiinst;
  	u32 bytestocopy;
  	unsigned long flags;
  
  	if (!wiinst)
  		return;
  
  	spin_lock_irqsave(&wiinst->lock, flags);
  
  	if (!(wiinst->state & WAVE_STATE_STARTED)) {
  		spin_unlock_irqrestore(&wiinst->lock, flags);
  		return;
  	}
  
  	emu10k1_wavein_update(wave_dev->card, wiinst);
  	emu10k1_wavein_getxfersize(wiinst, &bytestocopy);
  
  	spin_unlock_irqrestore(&wiinst->lock, flags);
  
  	if (bytestocopy >= wiinst->buffer.fragment_size) {
  	 	if (waitqueue_active(&wiinst->wait_queue))
  			wake_up_interruptible(&wiinst->wait_queue);
  	} else
  		DPD(3, "Not enough transfer size, %d\n", bytestocopy);
  
  	return;
  }
  
  static void emu10k1_waveout_bh(unsigned long refdata)
  {
  	struct emu10k1_wavedevice *wave_dev = (struct emu10k1_wavedevice *) refdata;
  	struct woinst *woinst = wave_dev->woinst;
  	u32 bytestocopy;
  	unsigned long flags;
  
  	if (!woinst)
  		return;
  
  	spin_lock_irqsave(&woinst->lock, flags);
  
  	if (!(woinst->state & WAVE_STATE_STARTED)) {
  		spin_unlock_irqrestore(&woinst->lock, flags);
  		return;
  	}
  
  	emu10k1_waveout_update(woinst);
  	emu10k1_waveout_getxfersize(woinst, &bytestocopy);
  
  	if (woinst->buffer.fill_silence) {
  		spin_unlock_irqrestore(&woinst->lock, flags);
  		emu10k1_waveout_fillsilence(woinst);
  	} else
  		spin_unlock_irqrestore(&woinst->lock, flags);
  
  	if (bytestocopy >= woinst->buffer.fragment_size) {
  		if (waitqueue_active(&woinst->wait_queue))
  			wake_up_interruptible(&woinst->wait_queue);
  	} else
  		DPD(3, "Not enough transfer size -> %d\n", bytestocopy);
  
  	return;
  }
  
  struct file_operations emu10k1_audio_fops = {
  	.owner		= THIS_MODULE,
  	.llseek		= no_llseek,
  	.read		= emu10k1_audio_read,
  	.write		= emu10k1_audio_write,
  	.poll		= emu10k1_audio_poll,
  	.ioctl		= emu10k1_audio_ioctl,
  	.mmap		= emu10k1_audio_mmap,
  	.open		= emu10k1_audio_open,
  	.release	= emu10k1_audio_release,
  };
  