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linux/sound/oss/emu10k1/audio.c
Arjan van de Ven 9c2e08c592 [PATCH] mark struct file_operations const 9 
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:46 -08:00

1596 lines
39 KiB
C
Raw Blame History

/*
**********************************************************************
* 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/mm.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)) {
int rc;
bytestocopy = min_t(u32, bytestocopy, count);
rc = emu10k1_wavein_xferdata(wiinst,
(u8 __user *)buffer,
&bytestocopy);
if (rc)
return rc;
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 = 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 = 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 = 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;
}
const 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,
};
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