Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 3111 insertions, 0 deletions

diff --git a/kernel/sound/core/oss/pcm_oss.c b/kernel/sound/core/oss/pcm_oss.c
new file mode 100644
index 000000000..58550cc93
--- /dev/null
+++ b/kernel/sound/core/oss/pcm_oss.c
@@ -0,0 +1,3111 @@
+/*
+ *  Digital Audio (PCM) abstract layer / OSS compatible
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#if 0
+#define PLUGIN_DEBUG
+#endif
+#if 0
+#define OSS_DEBUG
+#endif
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/math64.h>
+#include <linux/string.h>
+#include <sound/core.h>
+#include <sound/minors.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pcm_plugin.h"
+#include <sound/info.h>
+#include <linux/soundcard.h>
+#include <sound/initval.h>
+#include <sound/mixer_oss.h>
+
+#define OSS_ALSAEMULVER		_SIOR ('M', 249, int)
+
+static int dsp_map[SNDRV_CARDS];
+static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
+static bool nonblock_open = 1;
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
+MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
+MODULE_LICENSE("GPL");
+module_param_array(dsp_map, int, NULL, 0444);
+MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
+module_param_array(adsp_map, int, NULL, 0444);
+MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
+module_param(nonblock_open, bool, 0644);
+MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
+MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
+MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
+
+static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
+static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
+static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
+
+static inline mm_segment_t snd_enter_user(void)
+{
+	mm_segment_t fs = get_fs();
+	set_fs(get_ds());
+	return fs;
+}
+
+static inline void snd_leave_user(mm_segment_t fs)
+{
+	set_fs(fs);
+}
+
+/*
+ * helper functions to process hw_params
+ */
+static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
+{
+	int changed = 0;
+	if (i->min < min) {
+		i->min = min;
+		i->openmin = openmin;
+		changed = 1;
+	} else if (i->min == min && !i->openmin && openmin) {
+		i->openmin = 1;
+		changed = 1;
+	}
+	if (i->integer) {
+		if (i->openmin) {
+			i->min++;
+			i->openmin = 0;
+		}
+	}
+	if (snd_interval_checkempty(i)) {
+		snd_interval_none(i);
+		return -EINVAL;
+	}
+	return changed;
+}
+
+static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
+{
+	int changed = 0;
+	if (i->max > max) {
+		i->max = max;
+		i->openmax = openmax;
+		changed = 1;
+	} else if (i->max == max && !i->openmax && openmax) {
+		i->openmax = 1;
+		changed = 1;
+	}
+	if (i->integer) {
+		if (i->openmax) {
+			i->max--;
+			i->openmax = 0;
+		}
+	}
+	if (snd_interval_checkempty(i)) {
+		snd_interval_none(i);
+		return -EINVAL;
+	}
+	return changed;
+}
+
+static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
+{
+	struct snd_interval t;
+	t.empty = 0;
+	t.min = t.max = val;
+	t.openmin = t.openmax = 0;
+	t.integer = 1;
+	return snd_interval_refine(i, &t);
+}
+
+/**
+ * snd_pcm_hw_param_value_min
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the minimum value for field PAR.
+ */
+static unsigned int
+snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
+			   snd_pcm_hw_param_t var, int *dir)
+{
+	if (hw_is_mask(var)) {
+		if (dir)
+			*dir = 0;
+		return snd_mask_min(hw_param_mask_c(params, var));
+	}
+	if (hw_is_interval(var)) {
+		const struct snd_interval *i = hw_param_interval_c(params, var);
+		if (dir)
+			*dir = i->openmin;
+		return snd_interval_min(i);
+	}
+	return -EINVAL;
+}
+
+/**
+ * snd_pcm_hw_param_value_max
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the maximum value for field PAR.
+ */
+static unsigned int
+snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
+			   snd_pcm_hw_param_t var, int *dir)
+{
+	if (hw_is_mask(var)) {
+		if (dir)
+			*dir = 0;
+		return snd_mask_max(hw_param_mask_c(params, var));
+	}
+	if (hw_is_interval(var)) {
+		const struct snd_interval *i = hw_param_interval_c(params, var);
+		if (dir)
+			*dir = - (int) i->openmax;
+		return snd_interval_max(i);
+	}
+	return -EINVAL;
+}
+
+static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
+				  snd_pcm_hw_param_t var,
+				  const struct snd_mask *val)
+{
+	int changed;
+	changed = snd_mask_refine(hw_param_mask(params, var), val);
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
+				 struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var,
+				 const struct snd_mask *val)
+{
+	int changed = _snd_pcm_hw_param_mask(params, var, val);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, unsigned int val,
+				 int dir)
+{
+	int changed;
+	int open = 0;
+	if (dir) {
+		if (dir > 0) {
+			open = 1;
+		} else if (dir < 0) {
+			if (val > 0) {
+				open = 1;
+				val--;
+			}
+		}
+	}
+	if (hw_is_mask(var))
+		changed = snd_mask_refine_min(hw_param_mask(params, var),
+					      val + !!open);
+	else if (hw_is_interval(var))
+		changed = snd_interval_refine_min(hw_param_interval(params, var),
+						  val, open);
+	else
+		return -EINVAL;
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_min
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: minimal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ * values < VAL. Reduce configuration space accordingly.
+ * Return new minimum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
+				struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var, unsigned int val,
+				int *dir)
+{
+	int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value_min(params, var, dir);
+}
+
+static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, unsigned int val,
+				 int dir)
+{
+	int changed;
+	int open = 0;
+	if (dir) {
+		if (dir < 0) {
+			open = 1;
+		} else if (dir > 0) {
+			open = 1;
+			val++;
+		}
+	}
+	if (hw_is_mask(var)) {
+		if (val == 0 && open) {
+			snd_mask_none(hw_param_mask(params, var));
+			changed = -EINVAL;
+		} else
+			changed = snd_mask_refine_max(hw_param_mask(params, var),
+						      val - !!open);
+	} else if (hw_is_interval(var))
+		changed = snd_interval_refine_max(hw_param_interval(params, var),
+						  val, open);
+	else
+		return -EINVAL;
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_max
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: maximal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ *  values >= VAL + 1. Reduce configuration space accordingly.
+ *  Return new maximum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
+				struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var, unsigned int val,
+				int *dir)
+{
+	int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value_max(params, var, dir);
+}
+
+static int boundary_sub(int a, int adir,
+			int b, int bdir,
+			int *c, int *cdir)
+{
+	adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
+	bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
+	*c = a - b;
+	*cdir = adir - bdir;
+	if (*cdir == -2) {
+		(*c)--;
+	} else if (*cdir == 2) {
+		(*c)++;
+	}
+	return 0;
+}
+
+static int boundary_lt(unsigned int a, int adir,
+		       unsigned int b, int bdir)
+{
+	if (adir < 0) {
+		a--;
+		adir = 1;
+	} else if (adir > 0)
+		adir = 1;
+	if (bdir < 0) {
+		b--;
+		bdir = 1;
+	} else if (bdir > 0)
+		bdir = 1;
+	return a < b || (a == b && adir < bdir);
+}
+
+/* Return 1 if min is nearer to best than max */
+static int boundary_nearer(int min, int mindir,
+			   int best, int bestdir,
+			   int max, int maxdir)
+{
+	int dmin, dmindir;
+	int dmax, dmaxdir;
+	boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
+	boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
+	return boundary_lt(dmin, dmindir, dmax, dmaxdir);
+}
+
+/**
+ * snd_pcm_hw_param_near
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @best: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS set PAR to the available value
+ * nearest to VAL. Reduce configuration space accordingly.
+ * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
+ * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
+ * Return the value found.
+  */
+static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
+				 struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, unsigned int best,
+				 int *dir)
+{
+	struct snd_pcm_hw_params *save = NULL;
+	int v;
+	unsigned int saved_min;
+	int last = 0;
+	int min, max;
+	int mindir, maxdir;
+	int valdir = dir ? *dir : 0;
+	/* FIXME */
+	if (best > INT_MAX)
+		best = INT_MAX;
+	min = max = best;
+	mindir = maxdir = valdir;
+	if (maxdir > 0)
+		maxdir = 0;
+	else if (maxdir == 0)
+		maxdir = -1;
+	else {
+		maxdir = 1;
+		max--;
+	}
+	save = kmalloc(sizeof(*save), GFP_KERNEL);
+	if (save == NULL)
+		return -ENOMEM;
+	*save = *params;
+	saved_min = min;
+	min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
+	if (min >= 0) {
+		struct snd_pcm_hw_params *params1;
+		if (max < 0)
+			goto _end;
+		if ((unsigned int)min == saved_min && mindir == valdir)
+			goto _end;
+		params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
+		if (params1 == NULL) {
+			kfree(save);
+			return -ENOMEM;
+		}
+		*params1 = *save;
+		max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
+		if (max < 0) {
+			kfree(params1);
+			goto _end;
+		}
+		if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
+			*params = *params1;
+			last = 1;
+		}
+		kfree(params1);
+	} else {
+		*params = *save;
+		max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
+		if (max < 0) {
+			kfree(save);
+			return max;
+		}
+		last = 1;
+	}
+ _end:
+ 	kfree(save);
+	if (last)
+		v = snd_pcm_hw_param_last(pcm, params, var, dir);
+	else
+		v = snd_pcm_hw_param_first(pcm, params, var, dir);
+	snd_BUG_ON(v < 0);
+	return v;
+}
+
+static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, unsigned int val,
+				 int dir)
+{
+	int changed;
+	if (hw_is_mask(var)) {
+		struct snd_mask *m = hw_param_mask(params, var);
+		if (val == 0 && dir < 0) {
+			changed = -EINVAL;
+			snd_mask_none(m);
+		} else {
+			if (dir > 0)
+				val++;
+			else if (dir < 0)
+				val--;
+			changed = snd_mask_refine_set(hw_param_mask(params, var), val);
+		}
+	} else if (hw_is_interval(var)) {
+		struct snd_interval *i = hw_param_interval(params, var);
+		if (val == 0 && dir < 0) {
+			changed = -EINVAL;
+			snd_interval_none(i);
+		} else if (dir == 0)
+			changed = snd_interval_refine_set(i, val);
+		else {
+			struct snd_interval t;
+			t.openmin = 1;
+			t.openmax = 1;
+			t.empty = 0;
+			t.integer = 0;
+			if (dir < 0) {
+				t.min = val - 1;
+				t.max = val;
+			} else {
+				t.min = val;
+				t.max = val+1;
+			}
+			changed = snd_interval_refine(i, &t);
+		}
+	} else
+		return -EINVAL;
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_set
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ * values != VAL. Reduce configuration space accordingly.
+ *  Return VAL or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
+				struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var, unsigned int val,
+				int dir)
+{
+	int changed = _snd_pcm_hw_param_set(params, var, val, dir);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value(params, var, NULL);
+}
+
+static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
+					snd_pcm_hw_param_t var)
+{
+	int changed;
+	changed = snd_interval_setinteger(hw_param_interval(params, var));
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+	
+/*
+ * plugin
+ */
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_pcm_plugin *plugin, *next;
+	
+	plugin = runtime->oss.plugin_first;
+	while (plugin) {
+		next = plugin->next;
+		snd_pcm_plugin_free(plugin);
+		plugin = next;
+	}
+	runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
+	return 0;
+}
+
+static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
+{
+	struct snd_pcm_runtime *runtime = plugin->plug->runtime;
+	plugin->next = runtime->oss.plugin_first;
+	plugin->prev = NULL;
+	if (runtime->oss.plugin_first) {
+		runtime->oss.plugin_first->prev = plugin;
+		runtime->oss.plugin_first = plugin;
+	} else {
+		runtime->oss.plugin_last =
+		runtime->oss.plugin_first = plugin;
+	}
+	return 0;
+}
+
+int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
+{
+	struct snd_pcm_runtime *runtime = plugin->plug->runtime;
+	plugin->next = NULL;
+	plugin->prev = runtime->oss.plugin_last;
+	if (runtime->oss.plugin_last) {
+		runtime->oss.plugin_last->next = plugin;
+		runtime->oss.plugin_last = plugin;
+	} else {
+		runtime->oss.plugin_last =
+		runtime->oss.plugin_first = plugin;
+	}
+	return 0;
+}
+#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
+
+static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	long buffer_size = snd_pcm_lib_buffer_bytes(substream);
+	long bytes = frames_to_bytes(runtime, frames);
+	if (buffer_size == runtime->oss.buffer_bytes)
+		return bytes;
+#if BITS_PER_LONG >= 64
+	return runtime->oss.buffer_bytes * bytes / buffer_size;
+#else
+	{
+		u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
+		return div_u64(bsize, buffer_size);
+	}
+#endif
+}
+
+static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	long buffer_size = snd_pcm_lib_buffer_bytes(substream);
+	if (buffer_size == runtime->oss.buffer_bytes)
+		return bytes_to_frames(runtime, bytes);
+	return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
+}
+
+static inline
+snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
+{
+	return runtime->hw_ptr_interrupt;
+}
+
+/* define extended formats in the recent OSS versions (if any) */
+/* linear formats */
+#define AFMT_S32_LE      0x00001000
+#define AFMT_S32_BE      0x00002000
+#define AFMT_S24_LE      0x00008000
+#define AFMT_S24_BE      0x00010000
+#define AFMT_S24_PACKED  0x00040000
+
+/* other supported formats */
+#define AFMT_FLOAT       0x00004000
+#define AFMT_SPDIF_RAW   0x00020000
+
+/* unsupported formats */
+#define AFMT_AC3         0x00000400
+#define AFMT_VORBIS      0x00000800
+
+static snd_pcm_format_t snd_pcm_oss_format_from(int format)
+{
+	switch (format) {
+	case AFMT_MU_LAW:	return SNDRV_PCM_FORMAT_MU_LAW;
+	case AFMT_A_LAW:	return SNDRV_PCM_FORMAT_A_LAW;
+	case AFMT_IMA_ADPCM:	return SNDRV_PCM_FORMAT_IMA_ADPCM;
+	case AFMT_U8:		return SNDRV_PCM_FORMAT_U8;
+	case AFMT_S16_LE:	return SNDRV_PCM_FORMAT_S16_LE;
+	case AFMT_S16_BE:	return SNDRV_PCM_FORMAT_S16_BE;
+	case AFMT_S8:		return SNDRV_PCM_FORMAT_S8;
+	case AFMT_U16_LE:	return SNDRV_PCM_FORMAT_U16_LE;
+	case AFMT_U16_BE:	return SNDRV_PCM_FORMAT_U16_BE;
+	case AFMT_MPEG:		return SNDRV_PCM_FORMAT_MPEG;
+	case AFMT_S32_LE:	return SNDRV_PCM_FORMAT_S32_LE;
+	case AFMT_S32_BE:	return SNDRV_PCM_FORMAT_S32_BE;
+	case AFMT_S24_LE:	return SNDRV_PCM_FORMAT_S24_LE;
+	case AFMT_S24_BE:	return SNDRV_PCM_FORMAT_S24_BE;
+	case AFMT_S24_PACKED:	return SNDRV_PCM_FORMAT_S24_3LE;
+	case AFMT_FLOAT:	return SNDRV_PCM_FORMAT_FLOAT;
+	case AFMT_SPDIF_RAW:	return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
+	default:		return SNDRV_PCM_FORMAT_U8;
+	}
+}
+
+static int snd_pcm_oss_format_to(snd_pcm_format_t format)
+{
+	switch (format) {
+	case SNDRV_PCM_FORMAT_MU_LAW:	return AFMT_MU_LAW;
+	case SNDRV_PCM_FORMAT_A_LAW:	return AFMT_A_LAW;
+	case SNDRV_PCM_FORMAT_IMA_ADPCM:	return AFMT_IMA_ADPCM;
+	case SNDRV_PCM_FORMAT_U8:		return AFMT_U8;
+	case SNDRV_PCM_FORMAT_S16_LE:	return AFMT_S16_LE;
+	case SNDRV_PCM_FORMAT_S16_BE:	return AFMT_S16_BE;
+	case SNDRV_PCM_FORMAT_S8:		return AFMT_S8;
+	case SNDRV_PCM_FORMAT_U16_LE:	return AFMT_U16_LE;
+	case SNDRV_PCM_FORMAT_U16_BE:	return AFMT_U16_BE;
+	case SNDRV_PCM_FORMAT_MPEG:		return AFMT_MPEG;
+	case SNDRV_PCM_FORMAT_S32_LE:	return AFMT_S32_LE;
+	case SNDRV_PCM_FORMAT_S32_BE:	return AFMT_S32_BE;
+	case SNDRV_PCM_FORMAT_S24_LE:	return AFMT_S24_LE;
+	case SNDRV_PCM_FORMAT_S24_BE:	return AFMT_S24_BE;
+	case SNDRV_PCM_FORMAT_S24_3LE:	return AFMT_S24_PACKED;
+	case SNDRV_PCM_FORMAT_FLOAT:	return AFMT_FLOAT;
+	case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
+	default:			return -EINVAL;
+	}
+}
+
+static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream, 
+				   struct snd_pcm_hw_params *oss_params,
+				   struct snd_pcm_hw_params *slave_params)
+{
+	size_t s;
+	size_t oss_buffer_size, oss_period_size, oss_periods;
+	size_t min_period_size, max_period_size;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	size_t oss_frame_size;
+
+	oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
+			 params_channels(oss_params) / 8;
+
+	oss_buffer_size = snd_pcm_plug_client_size(substream,
+						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
+	oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
+	if (atomic_read(&substream->mmap_count)) {
+		if (oss_buffer_size > runtime->oss.mmap_bytes)
+			oss_buffer_size = runtime->oss.mmap_bytes;
+	}
+
+	if (substream->oss.setup.period_size > 16)
+		oss_period_size = substream->oss.setup.period_size;
+	else if (runtime->oss.fragshift) {
+		oss_period_size = 1 << runtime->oss.fragshift;
+		if (oss_period_size > oss_buffer_size / 2)
+			oss_period_size = oss_buffer_size / 2;
+	} else {
+		int sd;
+		size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
+
+		oss_period_size = oss_buffer_size;
+		do {
+			oss_period_size /= 2;
+		} while (oss_period_size > bytes_per_sec);
+		if (runtime->oss.subdivision == 0) {
+			sd = 4;
+			if (oss_period_size / sd > 4096)
+				sd *= 2;
+			if (oss_period_size / sd < 4096)
+				sd = 1;
+		} else
+			sd = runtime->oss.subdivision;
+		oss_period_size /= sd;
+		if (oss_period_size < 16)
+			oss_period_size = 16;
+	}
+
+	min_period_size = snd_pcm_plug_client_size(substream,
+						   snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
+	min_period_size *= oss_frame_size;
+	min_period_size = roundup_pow_of_two(min_period_size);
+	if (oss_period_size < min_period_size)
+		oss_period_size = min_period_size;
+
+	max_period_size = snd_pcm_plug_client_size(substream,
+						   snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
+	max_period_size *= oss_frame_size;
+	max_period_size = rounddown_pow_of_two(max_period_size);
+	if (oss_period_size > max_period_size)
+		oss_period_size = max_period_size;
+
+	oss_periods = oss_buffer_size / oss_period_size;
+
+	if (substream->oss.setup.periods > 1)
+		oss_periods = substream->oss.setup.periods;
+
+	s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
+	if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
+		s = runtime->oss.maxfrags;
+	if (oss_periods > s)
+		oss_periods = s;
+
+	s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
+	if (s < 2)
+		s = 2;
+	if (oss_periods < s)
+		oss_periods = s;
+
+	while (oss_period_size * oss_periods > oss_buffer_size)
+		oss_period_size /= 2;
+
+	if (oss_period_size < 16)
+		return -EINVAL;
+	runtime->oss.period_bytes = oss_period_size;
+	runtime->oss.period_frames = 1;
+	runtime->oss.periods = oss_periods;
+	return 0;
+}
+
+static int choose_rate(struct snd_pcm_substream *substream,
+		       struct snd_pcm_hw_params *params, unsigned int best_rate)
+{
+	struct snd_interval *it;
+	struct snd_pcm_hw_params *save;
+	unsigned int rate, prev;
+
+	save = kmalloc(sizeof(*save), GFP_KERNEL);
+	if (save == NULL)
+		return -ENOMEM;
+	*save = *params;
+	it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
+
+	/* try multiples of the best rate */
+	rate = best_rate;
+	for (;;) {
+		if (it->max < rate || (it->max == rate && it->openmax))
+			break;
+		if (it->min < rate || (it->min == rate && !it->openmin)) {
+			int ret;
+			ret = snd_pcm_hw_param_set(substream, params,
+						   SNDRV_PCM_HW_PARAM_RATE,
+						   rate, 0);
+			if (ret == (int)rate) {
+				kfree(save);
+				return rate;
+			}
+			*params = *save;
+		}
+		prev = rate;
+		rate += best_rate;
+		if (rate <= prev)
+			break;
+	}
+
+	/* not found, use the nearest rate */
+	kfree(save);
+	return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
+}
+
+static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_pcm_hw_params *params, *sparams;
+	struct snd_pcm_sw_params *sw_params;
+	ssize_t oss_buffer_size, oss_period_size;
+	size_t oss_frame_size;
+	int err;
+	int direct;
+	snd_pcm_format_t format, sformat;
+	int n;
+	struct snd_mask sformat_mask;
+	struct snd_mask mask;
+
+	if (mutex_lock_interruptible(&runtime->oss.params_lock))
+		return -EINTR;
+	sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
+	params = kmalloc(sizeof(*params), GFP_KERNEL);
+	sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
+	if (!sw_params || !params || !sparams) {
+		err = -ENOMEM;
+		goto failure;
+	}
+
+	if (atomic_read(&substream->mmap_count))
+		direct = 1;
+	else
+		direct = substream->oss.setup.direct;
+
+	_snd_pcm_hw_params_any(sparams);
+	_snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
+	_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
+	snd_mask_none(&mask);
+	if (atomic_read(&substream->mmap_count))
+		snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
+	else {
+		snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
+		if (!direct)
+			snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
+	}
+	err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
+	if (err < 0) {
+		pcm_dbg(substream->pcm, "No usable accesses\n");
+		err = -EINVAL;
+		goto failure;
+	}
+	choose_rate(substream, sparams, runtime->oss.rate);
+	snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
+
+	format = snd_pcm_oss_format_from(runtime->oss.format);
+
+	sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
+	if (direct)
+		sformat = format;
+	else
+		sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
+
+	if ((__force int)sformat < 0 ||
+	    !snd_mask_test(&sformat_mask, (__force int)sformat)) {
+		for (sformat = (__force snd_pcm_format_t)0;
+		     (__force int)sformat <= (__force int)SNDRV_PCM_FORMAT_LAST;
+		     sformat = (__force snd_pcm_format_t)((__force int)sformat + 1)) {
+			if (snd_mask_test(&sformat_mask, (__force int)sformat) &&
+			    snd_pcm_oss_format_to(sformat) >= 0)
+				break;
+		}
+		if ((__force int)sformat > (__force int)SNDRV_PCM_FORMAT_LAST) {
+			pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
+			err = -EINVAL;
+			goto failure;
+		}
+	}
+	err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
+	if (err < 0)
+		goto failure;
+
+	if (direct) {
+		memcpy(params, sparams, sizeof(*params));
+	} else {
+		_snd_pcm_hw_params_any(params);
+		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
+				      (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
+		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
+				      (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
+		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
+				      runtime->oss.channels, 0);
+		_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
+				      runtime->oss.rate, 0);
+		pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
+			 params_access(params), params_format(params),
+			 params_channels(params), params_rate(params));
+	}
+	pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
+		 params_access(sparams), params_format(sparams),
+		 params_channels(sparams), params_rate(sparams));
+
+	oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
+			 params_channels(params) / 8;
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	snd_pcm_oss_plugin_clear(substream);
+	if (!direct) {
+		/* add necessary plugins */
+		snd_pcm_oss_plugin_clear(substream);
+		if ((err = snd_pcm_plug_format_plugins(substream,
+						       params, 
+						       sparams)) < 0) {
+			pcm_dbg(substream->pcm,
+				"snd_pcm_plug_format_plugins failed: %i\n", err);
+			snd_pcm_oss_plugin_clear(substream);
+			goto failure;
+		}
+		if (runtime->oss.plugin_first) {
+			struct snd_pcm_plugin *plugin;
+			if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
+				pcm_dbg(substream->pcm,
+					"snd_pcm_plugin_build_io failed: %i\n", err);
+				snd_pcm_oss_plugin_clear(substream);
+				goto failure;
+			}
+			if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+				err = snd_pcm_plugin_append(plugin);
+			} else {
+				err = snd_pcm_plugin_insert(plugin);
+			}
+			if (err < 0) {
+				snd_pcm_oss_plugin_clear(substream);
+				goto failure;
+			}
+		}
+	}
+#endif
+
+	err = snd_pcm_oss_period_size(substream, params, sparams);
+	if (err < 0)
+		goto failure;
+
+	n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
+	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
+	if (err < 0)
+		goto failure;
+
+	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
+				     runtime->oss.periods, NULL);
+	if (err < 0)
+		goto failure;
+
+	snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+
+	if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
+		pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
+		goto failure;
+	}
+
+	memset(sw_params, 0, sizeof(*sw_params));
+	if (runtime->oss.trigger) {
+		sw_params->start_threshold = 1;
+	} else {
+		sw_params->start_threshold = runtime->boundary;
+	}
+	if (atomic_read(&substream->mmap_count) ||
+	    substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		sw_params->stop_threshold = runtime->boundary;
+	else
+		sw_params->stop_threshold = runtime->buffer_size;
+	sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
+	sw_params->period_step = 1;
+	sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+		1 : runtime->period_size;
+	if (atomic_read(&substream->mmap_count) ||
+	    substream->oss.setup.nosilence) {
+		sw_params->silence_threshold = 0;
+		sw_params->silence_size = 0;
+	} else {
+		snd_pcm_uframes_t frames;
+		frames = runtime->period_size + 16;
+		if (frames > runtime->buffer_size)
+			frames = runtime->buffer_size;
+		sw_params->silence_threshold = frames;
+		sw_params->silence_size = frames;
+	}
+
+	if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
+		pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
+		goto failure;
+	}
+
+	runtime->oss.periods = params_periods(sparams);
+	oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
+	if (oss_period_size < 0) {
+		err = -EINVAL;
+		goto failure;
+	}
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	if (runtime->oss.plugin_first) {
+		err = snd_pcm_plug_alloc(substream, oss_period_size);
+		if (err < 0)
+			goto failure;
+	}
+#endif
+	oss_period_size *= oss_frame_size;
+
+	oss_buffer_size = oss_period_size * runtime->oss.periods;
+	if (oss_buffer_size < 0) {
+		err = -EINVAL;
+		goto failure;
+	}
+
+	runtime->oss.period_bytes = oss_period_size;
+	runtime->oss.buffer_bytes = oss_buffer_size;
+
+	pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
+		 runtime->oss.period_bytes,
+		 runtime->oss.buffer_bytes);
+	pdprintf("slave: period_size = %i, buffer_size = %i\n",
+		 params_period_size(sparams),
+		 params_buffer_size(sparams));
+
+	runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
+	runtime->oss.channels = params_channels(params);
+	runtime->oss.rate = params_rate(params);
+
+	vfree(runtime->oss.buffer);
+	runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
+	if (!runtime->oss.buffer) {
+		err = -ENOMEM;
+		goto failure;
+	}
+
+	runtime->oss.params = 0;
+	runtime->oss.prepare = 1;
+	runtime->oss.buffer_used = 0;
+	if (runtime->dma_area)
+		snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
+
+	runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
+
+	err = 0;
+failure:
+	kfree(sw_params);
+	kfree(params);
+	kfree(sparams);
+	mutex_unlock(&runtime->oss.params_lock);
+	return err;
+}
+
+static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
+{
+	int idx, err;
+	struct snd_pcm_substream *asubstream = NULL, *substream;
+
+	for (idx = 0; idx < 2; idx++) {
+		substream = pcm_oss_file->streams[idx];
+		if (substream == NULL)
+			continue;
+		if (asubstream == NULL)
+			asubstream = substream;
+		if (substream->runtime->oss.params) {
+			err = snd_pcm_oss_change_params(substream);
+			if (err < 0)
+				return err;
+		}
+	}
+	if (!asubstream)
+		return -EIO;
+	if (r_substream)
+		*r_substream = asubstream;
+	return 0;
+}
+
+static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
+{
+	int err;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
+	if (err < 0) {
+		pcm_dbg(substream->pcm,
+			"snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
+		return err;
+	}
+	runtime->oss.prepare = 0;
+	runtime->oss.prev_hw_ptr_period = 0;
+	runtime->oss.period_ptr = 0;
+	runtime->oss.buffer_used = 0;
+
+	return 0;
+}
+
+static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime;
+	int err;
+
+	if (substream == NULL)
+		return 0;
+	runtime = substream->runtime;
+	if (runtime->oss.params) {
+		err = snd_pcm_oss_change_params(substream);
+		if (err < 0)
+			return err;
+	}
+	if (runtime->oss.prepare) {
+		err = snd_pcm_oss_prepare(substream);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
+{
+	struct snd_pcm_runtime *runtime;
+	snd_pcm_uframes_t frames;
+	int err = 0;
+
+	while (1) {
+		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
+		if (err < 0)
+			break;
+		runtime = substream->runtime;
+		if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
+			break;
+		/* in case of overrun, skip whole periods like OSS/Linux driver does */
+		/* until avail(delay) <= buffer_size */
+		frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
+		frames /= runtime->period_size;
+		frames *= runtime->period_size;
+		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
+		if (err < 0)
+			break;
+	}
+	return err;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int ret;
+	while (1) {
+		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
+		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm,
+				"pcm_oss: write: recovering from %s\n",
+				runtime->status->state == SNDRV_PCM_STATE_XRUN ?
+				"XRUN" : "SUSPEND");
+#endif
+			ret = snd_pcm_oss_prepare(substream);
+			if (ret < 0)
+				break;
+		}
+		if (in_kernel) {
+			mm_segment_t fs;
+			fs = snd_enter_user();
+			ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
+			snd_leave_user(fs);
+		} else {
+			ret = snd_pcm_lib_write(substream, (void __force __user *)ptr, frames);
+		}
+		if (ret != -EPIPE && ret != -ESTRPIPE)
+			break;
+		/* test, if we can't store new data, because the stream */
+		/* has not been started */
+		if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
+			return -EAGAIN;
+	}
+	return ret;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_sframes_t delay;
+	int ret;
+	while (1) {
+		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
+		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm,
+				"pcm_oss: read: recovering from %s\n",
+				runtime->status->state == SNDRV_PCM_STATE_XRUN ?
+				"XRUN" : "SUSPEND");
+#endif
+			ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+			if (ret < 0)
+				break;
+		} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
+			ret = snd_pcm_oss_prepare(substream);
+			if (ret < 0)
+				break;
+		}
+		ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
+		if (ret < 0)
+			break;
+		if (in_kernel) {
+			mm_segment_t fs;
+			fs = snd_enter_user();
+			ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
+			snd_leave_user(fs);
+		} else {
+			ret = snd_pcm_lib_read(substream, (void __force __user *)ptr, frames);
+		}
+		if (ret == -EPIPE) {
+			if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
+				ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+				if (ret < 0)
+					break;
+			}
+			continue;
+		}
+		if (ret != -ESTRPIPE)
+			break;
+	}
+	return ret;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int ret;
+	while (1) {
+		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
+		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm,
+				"pcm_oss: writev: recovering from %s\n",
+				runtime->status->state == SNDRV_PCM_STATE_XRUN ?
+				"XRUN" : "SUSPEND");
+#endif
+			ret = snd_pcm_oss_prepare(substream);
+			if (ret < 0)
+				break;
+		}
+		if (in_kernel) {
+			mm_segment_t fs;
+			fs = snd_enter_user();
+			ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
+			snd_leave_user(fs);
+		} else {
+			ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
+		}
+		if (ret != -EPIPE && ret != -ESTRPIPE)
+			break;
+
+		/* test, if we can't store new data, because the stream */
+		/* has not been started */
+		if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
+			return -EAGAIN;
+	}
+	return ret;
+}
+	
+snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int ret;
+	while (1) {
+		if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
+		    runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm,
+				"pcm_oss: readv: recovering from %s\n",
+				runtime->status->state == SNDRV_PCM_STATE_XRUN ?
+				"XRUN" : "SUSPEND");
+#endif
+			ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+			if (ret < 0)
+				break;
+		} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
+			ret = snd_pcm_oss_prepare(substream);
+			if (ret < 0)
+				break;
+		}
+		if (in_kernel) {
+			mm_segment_t fs;
+			fs = snd_enter_user();
+			ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
+			snd_leave_user(fs);
+		} else {
+			ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
+		}
+		if (ret != -EPIPE && ret != -ESTRPIPE)
+			break;
+	}
+	return ret;
+}
+
+static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	if (runtime->oss.plugin_first) {
+		struct snd_pcm_plugin_channel *channels;
+		size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
+		if (!in_kernel) {
+			if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
+				return -EFAULT;
+			buf = runtime->oss.buffer;
+		}
+		frames = bytes / oss_frame_bytes;
+		frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
+		if (frames1 < 0)
+			return frames1;
+		frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
+		if (frames1 <= 0)
+			return frames1;
+		bytes = frames1 * oss_frame_bytes;
+	} else
+#endif
+	{
+		frames = bytes_to_frames(runtime, bytes);
+		frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
+		if (frames1 <= 0)
+			return frames1;
+		bytes = frames_to_bytes(runtime, frames1);
+	}
+	return bytes;
+}
+
+static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
+{
+	size_t xfer = 0;
+	ssize_t tmp;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (atomic_read(&substream->mmap_count))
+		return -ENXIO;
+
+	if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
+		return tmp;
+	mutex_lock(&runtime->oss.params_lock);
+	while (bytes > 0) {
+		if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
+			tmp = bytes;
+			if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
+				tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
+			if (tmp > 0) {
+				if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
+					tmp = -EFAULT;
+					goto err;
+				}
+			}
+			runtime->oss.buffer_used += tmp;
+			buf += tmp;
+			bytes -= tmp;
+			xfer += tmp;
+			if (substream->oss.setup.partialfrag ||
+			    runtime->oss.buffer_used == runtime->oss.period_bytes) {
+				tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, 
+							 runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
+				if (tmp <= 0)
+					goto err;
+				runtime->oss.bytes += tmp;
+				runtime->oss.period_ptr += tmp;
+				runtime->oss.period_ptr %= runtime->oss.period_bytes;
+				if (runtime->oss.period_ptr == 0 ||
+				    runtime->oss.period_ptr == runtime->oss.buffer_used)
+					runtime->oss.buffer_used = 0;
+				else if ((substream->f_flags & O_NONBLOCK) != 0) {
+					tmp = -EAGAIN;
+					goto err;
+				}
+			}
+		} else {
+			tmp = snd_pcm_oss_write2(substream,
+						 (const char __force *)buf,
+						 runtime->oss.period_bytes, 0);
+			if (tmp <= 0)
+				goto err;
+			runtime->oss.bytes += tmp;
+			buf += tmp;
+			bytes -= tmp;
+			xfer += tmp;
+			if ((substream->f_flags & O_NONBLOCK) != 0 &&
+			    tmp != runtime->oss.period_bytes)
+				break;
+		}
+	}
+	mutex_unlock(&runtime->oss.params_lock);
+	return xfer;
+
+ err:
+	mutex_unlock(&runtime->oss.params_lock);
+	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
+}
+
+static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	char __user *final_dst = (char __force __user *)buf;
+	if (runtime->oss.plugin_first) {
+		struct snd_pcm_plugin_channel *channels;
+		size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
+		if (!in_kernel)
+			buf = runtime->oss.buffer;
+		frames = bytes / oss_frame_bytes;
+		frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
+		if (frames1 < 0)
+			return frames1;
+		frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
+		if (frames1 <= 0)
+			return frames1;
+		bytes = frames1 * oss_frame_bytes;
+		if (!in_kernel && copy_to_user(final_dst, buf, bytes))
+			return -EFAULT;
+	} else
+#endif
+	{
+		frames = bytes_to_frames(runtime, bytes);
+		frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
+		if (frames1 <= 0)
+			return frames1;
+		bytes = frames_to_bytes(runtime, frames1);
+	}
+	return bytes;
+}
+
+static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
+{
+	size_t xfer = 0;
+	ssize_t tmp;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (atomic_read(&substream->mmap_count))
+		return -ENXIO;
+
+	if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
+		return tmp;
+	mutex_lock(&runtime->oss.params_lock);
+	while (bytes > 0) {
+		if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
+			if (runtime->oss.buffer_used == 0) {
+				tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
+				if (tmp <= 0)
+					goto err;
+				runtime->oss.bytes += tmp;
+				runtime->oss.period_ptr = tmp;
+				runtime->oss.buffer_used = tmp;
+			}
+			tmp = bytes;
+			if ((size_t) tmp > runtime->oss.buffer_used)
+				tmp = runtime->oss.buffer_used;
+			if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
+				tmp = -EFAULT;
+				goto err;
+			}
+			buf += tmp;
+			bytes -= tmp;
+			xfer += tmp;
+			runtime->oss.buffer_used -= tmp;
+		} else {
+			tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
+						runtime->oss.period_bytes, 0);
+			if (tmp <= 0)
+				goto err;
+			runtime->oss.bytes += tmp;
+			buf += tmp;
+			bytes -= tmp;
+			xfer += tmp;
+		}
+	}
+	mutex_unlock(&runtime->oss.params_lock);
+	return xfer;
+
+ err:
+	mutex_unlock(&runtime->oss.params_lock);
+	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
+}
+
+static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	int i;
+
+	for (i = 0; i < 2; i++) { 
+		substream = pcm_oss_file->streams[i];
+		if (!substream)
+			continue;
+		runtime = substream->runtime;
+		snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+		runtime->oss.prepare = 1;
+		runtime->oss.buffer_used = 0;
+		runtime->oss.prev_hw_ptr_period = 0;
+		runtime->oss.period_ptr = 0;
+	}
+	return 0;
+}
+
+static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	if (substream != NULL) {
+		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
+			return err;
+		snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
+	}
+	/* note: all errors from the start action are ignored */
+	/* OSS apps do not know, how to handle them */
+	return 0;
+}
+
+static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
+{
+	struct snd_pcm_runtime *runtime;
+	ssize_t result = 0;
+	snd_pcm_state_t state;
+	long res;
+	wait_queue_t wait;
+
+	runtime = substream->runtime;
+	init_waitqueue_entry(&wait, current);
+	add_wait_queue(&runtime->sleep, &wait);
+#ifdef OSS_DEBUG
+	pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
+#endif
+	while (1) {
+		result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
+		if (result > 0) {
+			runtime->oss.buffer_used = 0;
+			result = 0;
+			break;
+		}
+		if (result != 0 && result != -EAGAIN)
+			break;
+		result = 0;
+		set_current_state(TASK_INTERRUPTIBLE);
+		snd_pcm_stream_lock_irq(substream);
+		state = runtime->status->state;
+		snd_pcm_stream_unlock_irq(substream);
+		if (state != SNDRV_PCM_STATE_RUNNING) {
+			set_current_state(TASK_RUNNING);
+			break;
+		}
+		res = schedule_timeout(10 * HZ);
+		if (signal_pending(current)) {
+			result = -ERESTARTSYS;
+			break;
+		}
+		if (res == 0) {
+			pcm_err(substream->pcm,
+				"OSS sync error - DMA timeout\n");
+			result = -EIO;
+			break;
+		}
+	}
+	remove_wait_queue(&runtime->sleep, &wait);
+	return result;
+}
+
+static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	int err = 0;
+	unsigned int saved_f_flags;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	snd_pcm_format_t format;
+	unsigned long width;
+	size_t size;
+
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	if (substream != NULL) {
+		runtime = substream->runtime;
+		if (atomic_read(&substream->mmap_count))
+			goto __direct;
+		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
+			return err;
+		format = snd_pcm_oss_format_from(runtime->oss.format);
+		width = snd_pcm_format_physical_width(format);
+		mutex_lock(&runtime->oss.params_lock);
+		if (runtime->oss.buffer_used > 0) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm, "sync: buffer_used\n");
+#endif
+			size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
+			snd_pcm_format_set_silence(format,
+						   runtime->oss.buffer + runtime->oss.buffer_used,
+						   size);
+			err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
+			if (err < 0) {
+				mutex_unlock(&runtime->oss.params_lock);
+				return err;
+			}
+		} else if (runtime->oss.period_ptr > 0) {
+#ifdef OSS_DEBUG
+			pcm_dbg(substream->pcm, "sync: period_ptr\n");
+#endif
+			size = runtime->oss.period_bytes - runtime->oss.period_ptr;
+			snd_pcm_format_set_silence(format,
+						   runtime->oss.buffer,
+						   size * 8 / width);
+			err = snd_pcm_oss_sync1(substream, size);
+			if (err < 0) {
+				mutex_unlock(&runtime->oss.params_lock);
+				return err;
+			}
+		}
+		/*
+		 * The ALSA's period might be a bit large than OSS one.
+		 * Fill the remain portion of ALSA period with zeros.
+		 */
+		size = runtime->control->appl_ptr % runtime->period_size;
+		if (size > 0) {
+			size = runtime->period_size - size;
+			if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+				size = (runtime->frame_bits * size) / 8;
+				while (size > 0) {
+					mm_segment_t fs;
+					size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
+					size -= size1;
+					size1 *= 8;
+					size1 /= runtime->sample_bits;
+					snd_pcm_format_set_silence(runtime->format,
+								   runtime->oss.buffer,
+								   size1);
+					size1 /= runtime->channels; /* frames */
+					fs = snd_enter_user();
+					snd_pcm_lib_write(substream, (void __force __user *)runtime->oss.buffer, size1);
+					snd_leave_user(fs);
+				}
+			} else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
+				void __user *buffers[runtime->channels];
+				memset(buffers, 0, runtime->channels * sizeof(void *));
+				snd_pcm_lib_writev(substream, buffers, size);
+			}
+		}
+		mutex_unlock(&runtime->oss.params_lock);
+		/*
+		 * finish sync: drain the buffer
+		 */
+	      __direct:
+		saved_f_flags = substream->f_flags;
+		substream->f_flags &= ~O_NONBLOCK;
+		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+		substream->f_flags = saved_f_flags;
+		if (err < 0)
+			return err;
+		runtime->oss.prepare = 1;
+	}
+
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+	if (substream != NULL) {
+		if ((err = snd_pcm_oss_make_ready(substream)) < 0)
+			return err;
+		runtime = substream->runtime;
+		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+		if (err < 0)
+			return err;
+		runtime->oss.buffer_used = 0;
+		runtime->oss.prepare = 1;
+	}
+	return 0;
+}
+
+static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
+{
+	int idx;
+
+	for (idx = 1; idx >= 0; --idx) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+		struct snd_pcm_runtime *runtime;
+		if (substream == NULL)
+			continue;
+		runtime = substream->runtime;
+		if (rate < 1000)
+			rate = 1000;
+		else if (rate > 192000)
+			rate = 192000;
+		if (runtime->oss.rate != rate) {
+			runtime->oss.params = 1;
+			runtime->oss.rate = rate;
+		}
+	}
+	return snd_pcm_oss_get_rate(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+	
+	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
+		return err;
+	return substream->runtime->oss.rate;
+}
+
+static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
+{
+	int idx;
+	if (channels < 1)
+		channels = 1;
+	if (channels > 128)
+		return -EINVAL;
+	for (idx = 1; idx >= 0; --idx) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+		struct snd_pcm_runtime *runtime;
+		if (substream == NULL)
+			continue;
+		runtime = substream->runtime;
+		if (runtime->oss.channels != channels) {
+			runtime->oss.params = 1;
+			runtime->oss.channels = channels;
+		}
+	}
+	return snd_pcm_oss_get_channels(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+	
+	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
+		return err;
+	return substream->runtime->oss.channels;
+}
+
+static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+	
+	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
+		return err;
+	return substream->runtime->oss.period_bytes;
+}
+
+static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+	int direct;
+	struct snd_pcm_hw_params *params;
+	unsigned int formats = 0;
+	struct snd_mask format_mask;
+	int fmt;
+
+	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
+		return err;
+	if (atomic_read(&substream->mmap_count))
+		direct = 1;
+	else
+		direct = substream->oss.setup.direct;
+	if (!direct)
+		return AFMT_MU_LAW | AFMT_U8 |
+		       AFMT_S16_LE | AFMT_S16_BE |
+		       AFMT_S8 | AFMT_U16_LE |
+		       AFMT_U16_BE |
+			AFMT_S32_LE | AFMT_S32_BE |
+			AFMT_S24_LE | AFMT_S24_BE |
+			AFMT_S24_PACKED;
+	params = kmalloc(sizeof(*params), GFP_KERNEL);
+	if (!params)
+		return -ENOMEM;
+	_snd_pcm_hw_params_any(params);
+	err = snd_pcm_hw_refine(substream, params);
+	format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); 
+	kfree(params);
+	if (err < 0)
+		return err;
+	for (fmt = 0; fmt < 32; ++fmt) {
+		if (snd_mask_test(&format_mask, fmt)) {
+			int f = snd_pcm_oss_format_to(fmt);
+			if (f >= 0)
+				formats |= f;
+		}
+	}
+	return formats;
+}
+
+static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
+{
+	int formats, idx;
+	
+	if (format != AFMT_QUERY) {
+		formats = snd_pcm_oss_get_formats(pcm_oss_file);
+		if (formats < 0)
+			return formats;
+		if (!(formats & format))
+			format = AFMT_U8;
+		for (idx = 1; idx >= 0; --idx) {
+			struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+			struct snd_pcm_runtime *runtime;
+			if (substream == NULL)
+				continue;
+			runtime = substream->runtime;
+			if (runtime->oss.format != format) {
+				runtime->oss.params = 1;
+				runtime->oss.format = format;
+			}
+		}
+	}
+	return snd_pcm_oss_get_format(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	int err;
+	
+	if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
+		return err;
+	return substream->runtime->oss.format;
+}
+
+static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
+{
+	struct snd_pcm_runtime *runtime;
+
+	if (substream == NULL)
+		return 0;
+	runtime = substream->runtime;
+	if (subdivide == 0) {
+		subdivide = runtime->oss.subdivision;
+		if (subdivide == 0)
+			subdivide = 1;
+		return subdivide;
+	}
+	if (runtime->oss.subdivision || runtime->oss.fragshift)
+		return -EINVAL;
+	if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
+	    subdivide != 8 && subdivide != 16)
+		return -EINVAL;
+	runtime->oss.subdivision = subdivide;
+	runtime->oss.params = 1;
+	return subdivide;
+}
+
+static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
+{
+	int err = -EINVAL, idx;
+
+	for (idx = 1; idx >= 0; --idx) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+		if (substream == NULL)
+			continue;
+		if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
+			return err;
+	}
+	return err;
+}
+
+static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
+{
+	struct snd_pcm_runtime *runtime;
+
+	if (substream == NULL)
+		return 0;
+	runtime = substream->runtime;
+	if (runtime->oss.subdivision || runtime->oss.fragshift)
+		return -EINVAL;
+	runtime->oss.fragshift = val & 0xffff;
+	runtime->oss.maxfrags = (val >> 16) & 0xffff;
+	if (runtime->oss.fragshift < 4)		/* < 16 */
+		runtime->oss.fragshift = 4;
+	if (runtime->oss.maxfrags < 2)
+		runtime->oss.maxfrags = 2;
+	runtime->oss.params = 1;
+	return 0;
+}
+
+static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
+{
+	int err = -EINVAL, idx;
+
+	for (idx = 1; idx >= 0; --idx) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+		if (substream == NULL)
+			continue;
+		if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
+			return err;
+	}
+	return err;
+}
+
+static int snd_pcm_oss_nonblock(struct file * file)
+{
+	spin_lock(&file->f_lock);
+	file->f_flags |= O_NONBLOCK;
+	spin_unlock(&file->f_lock);
+	return 0;
+}
+
+static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
+{
+
+	if (substream == NULL) {
+		res &= ~DSP_CAP_DUPLEX;
+		return res;
+	}
+#ifdef DSP_CAP_MULTI
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		if (substream->pstr->substream_count > 1)
+			res |= DSP_CAP_MULTI;
+#endif
+	/* DSP_CAP_REALTIME is set all times: */
+	/* all ALSA drivers can return actual pointer in ring buffer */
+#if defined(DSP_CAP_REALTIME) && 0
+	{
+		struct snd_pcm_runtime *runtime = substream->runtime;
+		if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
+			res &= ~DSP_CAP_REALTIME;
+	}
+#endif
+	return res;
+}
+
+static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	int result, idx;
+	
+	result = DSP_CAP_TRIGGER | DSP_CAP_MMAP	| DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
+	for (idx = 0; idx < 2; idx++) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+		result = snd_pcm_oss_get_caps1(substream, result);
+	}
+	result |= 0x0001;	/* revision - same as SB AWE 64 */
+	return result;
+}
+
+static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
+				      snd_pcm_uframes_t hw_ptr)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_uframes_t appl_ptr;
+	appl_ptr = hw_ptr + runtime->buffer_size;
+	appl_ptr %= runtime->boundary;
+	runtime->control->appl_ptr = appl_ptr;
+}
+
+static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
+{
+	struct snd_pcm_runtime *runtime;
+	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+	int err, cmd;
+
+#ifdef OSS_DEBUG
+	pcm_dbg(substream->pcm, "pcm_oss: trigger = 0x%x\n", trigger);
+#endif
+	
+	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+
+	if (psubstream) {
+		if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
+			return err;
+	}
+	if (csubstream) {
+		if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
+			return err;
+	}
+      	if (psubstream) {
+      		runtime = psubstream->runtime;
+		if (trigger & PCM_ENABLE_OUTPUT) {
+			if (runtime->oss.trigger)
+				goto _skip1;
+			if (atomic_read(&psubstream->mmap_count))
+				snd_pcm_oss_simulate_fill(psubstream,
+						get_hw_ptr_period(runtime));
+			runtime->oss.trigger = 1;
+			runtime->start_threshold = 1;
+			cmd = SNDRV_PCM_IOCTL_START;
+		} else {
+			if (!runtime->oss.trigger)
+				goto _skip1;
+			runtime->oss.trigger = 0;
+			runtime->start_threshold = runtime->boundary;
+			cmd = SNDRV_PCM_IOCTL_DROP;
+			runtime->oss.prepare = 1;
+		}
+		err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
+		if (err < 0)
+			return err;
+	}
+ _skip1:
+	if (csubstream) {
+      		runtime = csubstream->runtime;
+		if (trigger & PCM_ENABLE_INPUT) {
+			if (runtime->oss.trigger)
+				goto _skip2;
+			runtime->oss.trigger = 1;
+			runtime->start_threshold = 1;
+			cmd = SNDRV_PCM_IOCTL_START;
+		} else {
+			if (!runtime->oss.trigger)
+				goto _skip2;
+			runtime->oss.trigger = 0;
+			runtime->start_threshold = runtime->boundary;
+			cmd = SNDRV_PCM_IOCTL_DROP;
+			runtime->oss.prepare = 1;
+		}
+		err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
+		if (err < 0)
+			return err;
+	}
+ _skip2:
+	return 0;
+}
+
+static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+	int result = 0;
+
+	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+	if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
+		result |= PCM_ENABLE_OUTPUT;
+	if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
+		result |= PCM_ENABLE_INPUT;
+	return result;
+}
+
+static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	snd_pcm_sframes_t delay;
+	int err;
+
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	if (substream == NULL)
+		return -EINVAL;
+	if ((err = snd_pcm_oss_make_ready(substream)) < 0)
+		return err;
+	runtime = substream->runtime;
+	if (runtime->oss.params || runtime->oss.prepare)
+		return 0;
+	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
+	if (err == -EPIPE)
+		delay = 0;	/* hack for broken OSS applications */
+	else if (err < 0)
+		return err;
+	return snd_pcm_oss_bytes(substream, delay);
+}
+
+static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
+{	
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	snd_pcm_sframes_t delay;
+	int fixup;
+	struct count_info info;
+	int err;
+
+	if (_info == NULL)
+		return -EFAULT;
+	substream = pcm_oss_file->streams[stream];
+	if (substream == NULL)
+		return -EINVAL;
+	if ((err = snd_pcm_oss_make_ready(substream)) < 0)
+		return err;
+	runtime = substream->runtime;
+	if (runtime->oss.params || runtime->oss.prepare) {
+		memset(&info, 0, sizeof(info));
+		if (copy_to_user(_info, &info, sizeof(info)))
+			return -EFAULT;
+		return 0;
+	}
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
+		if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
+			err = 0;
+			delay = 0;
+			fixup = 0;
+		} else {
+			fixup = runtime->oss.buffer_used;
+		}
+	} else {
+		err = snd_pcm_oss_capture_position_fixup(substream, &delay);
+		fixup = -runtime->oss.buffer_used;
+	}
+	if (err < 0)
+		return err;
+	info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
+	if (atomic_read(&substream->mmap_count)) {
+		snd_pcm_sframes_t n;
+		delay = get_hw_ptr_period(runtime);
+		n = delay - runtime->oss.prev_hw_ptr_period;
+		if (n < 0)
+			n += runtime->boundary;
+		info.blocks = n / runtime->period_size;
+		runtime->oss.prev_hw_ptr_period = delay;
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+			snd_pcm_oss_simulate_fill(substream, delay);
+		info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
+	} else {
+		delay = snd_pcm_oss_bytes(substream, delay);
+		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			if (substream->oss.setup.buggyptr)
+				info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
+			else
+				info.blocks = (delay + fixup) / runtime->oss.period_bytes;
+			info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
+		} else {
+			delay += fixup;
+			info.blocks = delay / runtime->oss.period_bytes;
+			info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
+		}
+	}
+	if (copy_to_user(_info, &info, sizeof(info)))
+		return -EFAULT;
+	return 0;
+}
+
+static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	snd_pcm_sframes_t avail;
+	int fixup;
+	struct audio_buf_info info;
+	int err;
+
+	if (_info == NULL)
+		return -EFAULT;
+	substream = pcm_oss_file->streams[stream];
+	if (substream == NULL)
+		return -EINVAL;
+	runtime = substream->runtime;
+
+	if (runtime->oss.params &&
+	    (err = snd_pcm_oss_change_params(substream)) < 0)
+		return err;
+
+	info.fragsize = runtime->oss.period_bytes;
+	info.fragstotal = runtime->periods;
+	if (runtime->oss.prepare) {
+		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
+			info.fragments = runtime->oss.periods;
+		} else {
+			info.bytes = 0;
+			info.fragments = 0;
+		}
+	} else {
+		if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
+			if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
+				avail = runtime->buffer_size;
+				err = 0;
+				fixup = 0;
+			} else {
+				avail = runtime->buffer_size - avail;
+				fixup = -runtime->oss.buffer_used;
+			}
+		} else {
+			err = snd_pcm_oss_capture_position_fixup(substream, &avail);
+			fixup = runtime->oss.buffer_used;
+		}
+		if (err < 0)
+			return err;
+		info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
+		info.fragments = info.bytes / runtime->oss.period_bytes;
+	}
+
+#ifdef OSS_DEBUG
+	pcm_dbg(substream->pcm,
+		"pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
+		info.bytes, info.fragments, info.fragstotal, info.fragsize);
+#endif
+	if (copy_to_user(_info, &info, sizeof(info)))
+		return -EFAULT;
+	return 0;
+}
+
+static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
+{
+	// it won't be probably implemented
+	// pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
+	return -EINVAL;
+}
+
+static const char *strip_task_path(const char *path)
+{
+	const char *ptr, *ptrl = NULL;
+	for (ptr = path; *ptr; ptr++) {
+		if (*ptr == '/')
+			ptrl = ptr + 1;
+	}
+	return ptrl;
+}
+
+static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
+				      const char *task_name,
+				      struct snd_pcm_oss_setup *rsetup)
+{
+	struct snd_pcm_oss_setup *setup;
+
+	mutex_lock(&pcm->streams[stream].oss.setup_mutex);
+	do {
+		for (setup = pcm->streams[stream].oss.setup_list; setup;
+		     setup = setup->next) {
+			if (!strcmp(setup->task_name, task_name))
+				goto out;
+		}
+	} while ((task_name = strip_task_path(task_name)) != NULL);
+ out:
+	if (setup)
+		*rsetup = *setup;
+	mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
+}
+
+static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime;
+	runtime = substream->runtime;
+	vfree(runtime->oss.buffer);
+	runtime->oss.buffer = NULL;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	snd_pcm_oss_plugin_clear(substream);
+#endif
+	substream->oss.oss = 0;
+}
+
+static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
+				       struct snd_pcm_oss_setup *setup,
+				       int minor)
+{
+	struct snd_pcm_runtime *runtime;
+
+	substream->oss.oss = 1;
+	substream->oss.setup = *setup;
+	if (setup->nonblock)
+		substream->f_flags |= O_NONBLOCK;
+	else if (setup->block)
+		substream->f_flags &= ~O_NONBLOCK;
+	runtime = substream->runtime;
+	runtime->oss.params = 1;
+	runtime->oss.trigger = 1;
+	runtime->oss.rate = 8000;
+	mutex_init(&runtime->oss.params_lock);
+	switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
+	case SNDRV_MINOR_OSS_PCM_8:
+		runtime->oss.format = AFMT_U8;
+		break;
+	case SNDRV_MINOR_OSS_PCM_16:
+		runtime->oss.format = AFMT_S16_LE;
+		break;
+	default:
+		runtime->oss.format = AFMT_MU_LAW;
+	}
+	runtime->oss.channels = 1;
+	runtime->oss.fragshift = 0;
+	runtime->oss.maxfrags = 0;
+	runtime->oss.subdivision = 0;
+	substream->pcm_release = snd_pcm_oss_release_substream;
+}
+
+static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
+{
+	int cidx;
+	if (!pcm_oss_file)
+		return 0;
+	for (cidx = 0; cidx < 2; ++cidx) {
+		struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
+		if (substream)
+			snd_pcm_release_substream(substream);
+	}
+	kfree(pcm_oss_file);
+	return 0;
+}
+
+static int snd_pcm_oss_open_file(struct file *file,
+				 struct snd_pcm *pcm,
+				 struct snd_pcm_oss_file **rpcm_oss_file,
+				 int minor,
+				 struct snd_pcm_oss_setup *setup)
+{
+	int idx, err;
+	struct snd_pcm_oss_file *pcm_oss_file;
+	struct snd_pcm_substream *substream;
+	fmode_t f_mode = file->f_mode;
+
+	if (rpcm_oss_file)
+		*rpcm_oss_file = NULL;
+
+	pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
+	if (pcm_oss_file == NULL)
+		return -ENOMEM;
+
+	if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
+	    (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
+		f_mode = FMODE_WRITE;
+
+	file->f_flags &= ~O_APPEND;
+	for (idx = 0; idx < 2; idx++) {
+		if (setup[idx].disable)
+			continue;
+		if (! pcm->streams[idx].substream_count)
+			continue; /* no matching substream */
+		if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
+			if (! (f_mode & FMODE_WRITE))
+				continue;
+		} else {
+			if (! (f_mode & FMODE_READ))
+				continue;
+		}
+		err = snd_pcm_open_substream(pcm, idx, file, &substream);
+		if (err < 0) {
+			snd_pcm_oss_release_file(pcm_oss_file);
+			return err;
+		}
+
+		pcm_oss_file->streams[idx] = substream;
+		substream->file = pcm_oss_file;
+		snd_pcm_oss_init_substream(substream, &setup[idx], minor);
+	}
+	
+	if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
+		snd_pcm_oss_release_file(pcm_oss_file);
+		return -EINVAL;
+	}
+
+	file->private_data = pcm_oss_file;
+	if (rpcm_oss_file)
+		*rpcm_oss_file = pcm_oss_file;
+	return 0;
+}
+
+
+static int snd_task_name(struct task_struct *task, char *name, size_t size)
+{
+	unsigned int idx;
+
+	if (snd_BUG_ON(!task || !name || size < 2))
+		return -EINVAL;
+	for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
+		name[idx] = task->comm[idx];
+	name[idx] = '\0';
+	return 0;
+}
+
+static int snd_pcm_oss_open(struct inode *inode, struct file *file)
+{
+	int err;
+	char task_name[32];
+	struct snd_pcm *pcm;
+	struct snd_pcm_oss_file *pcm_oss_file;
+	struct snd_pcm_oss_setup setup[2];
+	int nonblock;
+	wait_queue_t wait;
+
+	err = nonseekable_open(inode, file);
+	if (err < 0)
+		return err;
+
+	pcm = snd_lookup_oss_minor_data(iminor(inode),
+					SNDRV_OSS_DEVICE_TYPE_PCM);
+	if (pcm == NULL) {
+		err = -ENODEV;
+		goto __error1;
+	}
+	err = snd_card_file_add(pcm->card, file);
+	if (err < 0)
+		goto __error1;
+	if (!try_module_get(pcm->card->module)) {
+		err = -EFAULT;
+		goto __error2;
+	}
+	if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
+		err = -EFAULT;
+		goto __error;
+	}
+	memset(setup, 0, sizeof(setup));
+	if (file->f_mode & FMODE_WRITE)
+		snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+					   task_name, &setup[0]);
+	if (file->f_mode & FMODE_READ)
+		snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
+					   task_name, &setup[1]);
+
+	nonblock = !!(file->f_flags & O_NONBLOCK);
+	if (!nonblock)
+		nonblock = nonblock_open;
+
+	init_waitqueue_entry(&wait, current);
+	add_wait_queue(&pcm->open_wait, &wait);
+	mutex_lock(&pcm->open_mutex);
+	while (1) {
+		err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
+					    iminor(inode), setup);
+		if (err >= 0)
+			break;
+		if (err == -EAGAIN) {
+			if (nonblock) {
+				err = -EBUSY;
+				break;
+			}
+		} else
+			break;
+		set_current_state(TASK_INTERRUPTIBLE);
+		mutex_unlock(&pcm->open_mutex);
+		schedule();
+		mutex_lock(&pcm->open_mutex);
+		if (pcm->card->shutdown) {
+			err = -ENODEV;
+			break;
+		}
+		if (signal_pending(current)) {
+			err = -ERESTARTSYS;
+			break;
+		}
+	}
+	remove_wait_queue(&pcm->open_wait, &wait);
+	mutex_unlock(&pcm->open_mutex);
+	if (err < 0)
+		goto __error;
+	snd_card_unref(pcm->card);
+	return err;
+
+      __error:
+     	module_put(pcm->card->module);
+      __error2:
+      	snd_card_file_remove(pcm->card, file);
+      __error1:
+	if (pcm)
+		snd_card_unref(pcm->card);
+	return err;
+}
+
+static int snd_pcm_oss_release(struct inode *inode, struct file *file)
+{
+	struct snd_pcm *pcm;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_oss_file *pcm_oss_file;
+
+	pcm_oss_file = file->private_data;
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	if (substream == NULL)
+		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+	if (snd_BUG_ON(!substream))
+		return -ENXIO;
+	pcm = substream->pcm;
+	if (!pcm->card->shutdown)
+		snd_pcm_oss_sync(pcm_oss_file);
+	mutex_lock(&pcm->open_mutex);
+	snd_pcm_oss_release_file(pcm_oss_file);
+	mutex_unlock(&pcm->open_mutex);
+	wake_up(&pcm->open_wait);
+	module_put(pcm->card->module);
+	snd_card_file_remove(pcm->card, file);
+	return 0;
+}
+
+static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct snd_pcm_oss_file *pcm_oss_file;
+	int __user *p = (int __user *)arg;
+	int res;
+
+	pcm_oss_file = file->private_data;
+	if (cmd == OSS_GETVERSION)
+		return put_user(SNDRV_OSS_VERSION, p);
+	if (cmd == OSS_ALSAEMULVER)
+		return put_user(1, p);
+#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
+	if (((cmd >> 8) & 0xff) == 'M')	{	/* mixer ioctl - for OSS compatibility */
+		struct snd_pcm_substream *substream;
+		int idx;
+		for (idx = 0; idx < 2; ++idx) {
+			substream = pcm_oss_file->streams[idx];
+			if (substream != NULL)
+				break;
+		}
+		if (snd_BUG_ON(idx >= 2))
+			return -ENXIO;
+		return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
+	}
+#endif
+	if (((cmd >> 8) & 0xff) != 'P')
+		return -EINVAL;
+#ifdef OSS_DEBUG
+	pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
+#endif
+	switch (cmd) {
+	case SNDCTL_DSP_RESET:
+		return snd_pcm_oss_reset(pcm_oss_file);
+	case SNDCTL_DSP_SYNC:
+		return snd_pcm_oss_sync(pcm_oss_file);
+	case SNDCTL_DSP_SPEED:
+		if (get_user(res, p))
+			return -EFAULT;
+		if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
+			return res;
+		return put_user(res, p);
+	case SOUND_PCM_READ_RATE:
+		res = snd_pcm_oss_get_rate(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_STEREO:
+		if (get_user(res, p))
+			return -EFAULT;
+		res = res > 0 ? 2 : 1;
+		if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
+			return res;
+		return put_user(--res, p);
+	case SNDCTL_DSP_GETBLKSIZE:
+		res = snd_pcm_oss_get_block_size(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_SETFMT:
+		if (get_user(res, p))
+			return -EFAULT;
+		res = snd_pcm_oss_set_format(pcm_oss_file, res);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SOUND_PCM_READ_BITS:
+		res = snd_pcm_oss_get_format(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_CHANNELS:
+		if (get_user(res, p))
+			return -EFAULT;
+		res = snd_pcm_oss_set_channels(pcm_oss_file, res);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SOUND_PCM_READ_CHANNELS:
+		res = snd_pcm_oss_get_channels(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SOUND_PCM_WRITE_FILTER:
+	case SOUND_PCM_READ_FILTER:
+		return -EIO;
+	case SNDCTL_DSP_POST:
+		return snd_pcm_oss_post(pcm_oss_file);
+	case SNDCTL_DSP_SUBDIVIDE:
+		if (get_user(res, p))
+			return -EFAULT;
+		res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_SETFRAGMENT:
+		if (get_user(res, p))
+			return -EFAULT;
+		return snd_pcm_oss_set_fragment(pcm_oss_file, res);
+	case SNDCTL_DSP_GETFMTS:
+		res = snd_pcm_oss_get_formats(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_GETOSPACE:
+	case SNDCTL_DSP_GETISPACE:
+		return snd_pcm_oss_get_space(pcm_oss_file,
+			cmd == SNDCTL_DSP_GETISPACE ?
+				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+			(struct audio_buf_info __user *) arg);
+	case SNDCTL_DSP_NONBLOCK:
+		return snd_pcm_oss_nonblock(file);
+	case SNDCTL_DSP_GETCAPS:
+		res = snd_pcm_oss_get_caps(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_GETTRIGGER:
+		res = snd_pcm_oss_get_trigger(pcm_oss_file);
+		if (res < 0)
+			return res;
+		return put_user(res, p);
+	case SNDCTL_DSP_SETTRIGGER:
+		if (get_user(res, p))
+			return -EFAULT;
+		return snd_pcm_oss_set_trigger(pcm_oss_file, res);
+	case SNDCTL_DSP_GETIPTR:
+	case SNDCTL_DSP_GETOPTR:
+		return snd_pcm_oss_get_ptr(pcm_oss_file,
+			cmd == SNDCTL_DSP_GETIPTR ?
+				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+			(struct count_info __user *) arg);
+	case SNDCTL_DSP_MAPINBUF:
+	case SNDCTL_DSP_MAPOUTBUF:
+		return snd_pcm_oss_get_mapbuf(pcm_oss_file,
+			cmd == SNDCTL_DSP_MAPINBUF ?
+				SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+			(struct buffmem_desc __user *) arg);
+	case SNDCTL_DSP_SETSYNCRO:
+		/* stop DMA now.. */
+		return 0;
+	case SNDCTL_DSP_SETDUPLEX:
+		if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
+			return 0;
+		return -EIO;
+	case SNDCTL_DSP_GETODELAY:
+		res = snd_pcm_oss_get_odelay(pcm_oss_file);
+		if (res < 0) {
+			/* it's for sure, some broken apps don't check for error codes */
+			put_user(0, p);
+			return res;
+		}
+		return put_user(res, p);
+	case SNDCTL_DSP_PROFILE:
+		return 0;	/* silently ignore */
+	default:
+		pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
+	}
+	return -EINVAL;
+}
+
+#ifdef CONFIG_COMPAT
+/* all compatible */
+#define snd_pcm_oss_ioctl_compat	snd_pcm_oss_ioctl
+#else
+#define snd_pcm_oss_ioctl_compat	NULL
+#endif
+
+static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
+{
+	struct snd_pcm_oss_file *pcm_oss_file;
+	struct snd_pcm_substream *substream;
+
+	pcm_oss_file = file->private_data;
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+	if (substream == NULL)
+		return -ENXIO;
+	substream->f_flags = file->f_flags & O_NONBLOCK;
+#ifndef OSS_DEBUG
+	return snd_pcm_oss_read1(substream, buf, count);
+#else
+	{
+		ssize_t res = snd_pcm_oss_read1(substream, buf, count);
+		pcm_dbg(substream->pcm,
+			"pcm_oss: read %li bytes (returned %li bytes)\n",
+			(long)count, (long)res);
+		return res;
+	}
+#endif
+}
+
+static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
+{
+	struct snd_pcm_oss_file *pcm_oss_file;
+	struct snd_pcm_substream *substream;
+	long result;
+
+	pcm_oss_file = file->private_data;
+	substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	if (substream == NULL)
+		return -ENXIO;
+	substream->f_flags = file->f_flags & O_NONBLOCK;
+	result = snd_pcm_oss_write1(substream, buf, count);
+#ifdef OSS_DEBUG
+	pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
+	       (long)count, (long)result);
+#endif
+	return result;
+}
+
+static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	if (atomic_read(&substream->mmap_count))
+		return runtime->oss.prev_hw_ptr_period !=
+						get_hw_ptr_period(runtime);
+	else
+		return snd_pcm_playback_avail(runtime) >=
+						runtime->oss.period_frames;
+}
+
+static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	if (atomic_read(&substream->mmap_count))
+		return runtime->oss.prev_hw_ptr_period !=
+						get_hw_ptr_period(runtime);
+	else
+		return snd_pcm_capture_avail(runtime) >=
+						runtime->oss.period_frames;
+}
+
+static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
+{
+	struct snd_pcm_oss_file *pcm_oss_file;
+	unsigned int mask;
+	struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+	
+	pcm_oss_file = file->private_data;
+
+	psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+	csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+
+	mask = 0;
+	if (psubstream != NULL) {
+		struct snd_pcm_runtime *runtime = psubstream->runtime;
+		poll_wait(file, &runtime->sleep, wait);
+		snd_pcm_stream_lock_irq(psubstream);
+		if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
+		    (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
+		     snd_pcm_oss_playback_ready(psubstream)))
+			mask |= POLLOUT | POLLWRNORM;
+		snd_pcm_stream_unlock_irq(psubstream);
+	}
+	if (csubstream != NULL) {
+		struct snd_pcm_runtime *runtime = csubstream->runtime;
+		snd_pcm_state_t ostate;
+		poll_wait(file, &runtime->sleep, wait);
+		snd_pcm_stream_lock_irq(csubstream);
+		if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
+		    snd_pcm_oss_capture_ready(csubstream))
+			mask |= POLLIN | POLLRDNORM;
+		snd_pcm_stream_unlock_irq(csubstream);
+		if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
+			struct snd_pcm_oss_file ofile;
+			memset(&ofile, 0, sizeof(ofile));
+			ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+			runtime->oss.trigger = 0;
+			snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
+		}
+	}
+
+	return mask;
+}
+
+static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
+{
+	struct snd_pcm_oss_file *pcm_oss_file;
+	struct snd_pcm_substream *substream = NULL;
+	struct snd_pcm_runtime *runtime;
+	int err;
+
+#ifdef OSS_DEBUG
+	pr_debug("pcm_oss: mmap begin\n");
+#endif
+	pcm_oss_file = file->private_data;
+	switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
+	case VM_READ | VM_WRITE:
+		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+		if (substream)
+			break;
+		/* Fall through */
+	case VM_READ:
+		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+		break;
+	case VM_WRITE:
+		substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+		break;
+	default:
+		return -EINVAL;
+	}
+	/* set VM_READ access as well to fix memset() routines that do
+	   reads before writes (to improve performance) */
+	area->vm_flags |= VM_READ;
+	if (substream == NULL)
+		return -ENXIO;
+	runtime = substream->runtime;
+	if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
+		return -EIO;
+	if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
+		runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
+	else
+		return -EIO;
+	
+	if (runtime->oss.params) {
+		if ((err = snd_pcm_oss_change_params(substream)) < 0)
+			return err;
+	}
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+	if (runtime->oss.plugin_first != NULL)
+		return -EIO;
+#endif
+
+	if (area->vm_pgoff != 0)
+		return -EINVAL;
+
+	err = snd_pcm_mmap_data(substream, file, area);
+	if (err < 0)
+		return err;
+	runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
+	runtime->silence_threshold = 0;
+	runtime->silence_size = 0;
+#ifdef OSS_DEBUG
+	pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
+	       runtime->oss.mmap_bytes);
+#endif
+	/* In mmap mode we never stop */
+	runtime->stop_threshold = runtime->boundary;
+
+	return 0;
+}
+
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+/*
+ *  /proc interface
+ */
+
+static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
+				  struct snd_info_buffer *buffer)
+{
+	struct snd_pcm_str *pstr = entry->private_data;
+	struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
+	mutex_lock(&pstr->oss.setup_mutex);
+	while (setup) {
+		snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
+			    setup->task_name,
+			    setup->periods,
+			    setup->period_size,
+			    setup->disable ? " disable" : "",
+			    setup->direct ? " direct" : "",
+			    setup->block ? " block" : "",
+			    setup->nonblock ? " non-block" : "",
+			    setup->partialfrag ? " partial-frag" : "",
+			    setup->nosilence ? " no-silence" : "");
+		setup = setup->next;
+	}
+	mutex_unlock(&pstr->oss.setup_mutex);
+}
+
+static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
+{
+	struct snd_pcm_oss_setup *setup, *setupn;
+
+	for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
+	     setup; setup = setupn) {
+		setupn = setup->next;
+		kfree(setup->task_name);
+		kfree(setup);
+	}
+	pstr->oss.setup_list = NULL;
+}
+
+static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
+				   struct snd_info_buffer *buffer)
+{
+	struct snd_pcm_str *pstr = entry->private_data;
+	char line[128], str[32], task_name[32];
+	const char *ptr;
+	int idx1;
+	struct snd_pcm_oss_setup *setup, *setup1, template;
+
+	while (!snd_info_get_line(buffer, line, sizeof(line))) {
+		mutex_lock(&pstr->oss.setup_mutex);
+		memset(&template, 0, sizeof(template));
+		ptr = snd_info_get_str(task_name, line, sizeof(task_name));
+		if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
+			snd_pcm_oss_proc_free_setup_list(pstr);
+			mutex_unlock(&pstr->oss.setup_mutex);
+			continue;
+		}
+		for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
+			if (!strcmp(setup->task_name, task_name)) {
+				template = *setup;
+				break;
+			}
+		}
+		ptr = snd_info_get_str(str, ptr, sizeof(str));
+		template.periods = simple_strtoul(str, NULL, 10);
+		ptr = snd_info_get_str(str, ptr, sizeof(str));
+		template.period_size = simple_strtoul(str, NULL, 10);
+		for (idx1 = 31; idx1 >= 0; idx1--)
+			if (template.period_size & (1 << idx1))
+				break;
+		for (idx1--; idx1 >= 0; idx1--)
+			template.period_size &= ~(1 << idx1);
+		do {
+			ptr = snd_info_get_str(str, ptr, sizeof(str));
+			if (!strcmp(str, "disable")) {
+				template.disable = 1;
+			} else if (!strcmp(str, "direct")) {
+				template.direct = 1;
+			} else if (!strcmp(str, "block")) {
+				template.block = 1;
+			} else if (!strcmp(str, "non-block")) {
+				template.nonblock = 1;
+			} else if (!strcmp(str, "partial-frag")) {
+				template.partialfrag = 1;
+			} else if (!strcmp(str, "no-silence")) {
+				template.nosilence = 1;
+			} else if (!strcmp(str, "buggy-ptr")) {
+				template.buggyptr = 1;
+			}
+		} while (*str);
+		if (setup == NULL) {
+			setup = kmalloc(sizeof(*setup), GFP_KERNEL);
+			if (! setup) {
+				buffer->error = -ENOMEM;
+				mutex_unlock(&pstr->oss.setup_mutex);
+				return;
+			}
+			if (pstr->oss.setup_list == NULL)
+				pstr->oss.setup_list = setup;
+			else {
+				for (setup1 = pstr->oss.setup_list;
+				     setup1->next; setup1 = setup1->next);
+				setup1->next = setup;
+			}
+			template.task_name = kstrdup(task_name, GFP_KERNEL);
+			if (! template.task_name) {
+				kfree(setup);
+				buffer->error = -ENOMEM;
+				mutex_unlock(&pstr->oss.setup_mutex);
+				return;
+			}
+		}
+		*setup = template;
+		mutex_unlock(&pstr->oss.setup_mutex);
+	}
+}
+
+static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
+{
+	int stream;
+	for (stream = 0; stream < 2; ++stream) {
+		struct snd_info_entry *entry;
+		struct snd_pcm_str *pstr = &pcm->streams[stream];
+		if (pstr->substream_count == 0)
+			continue;
+		if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
+			entry->content = SNDRV_INFO_CONTENT_TEXT;
+			entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
+			entry->c.text.read = snd_pcm_oss_proc_read;
+			entry->c.text.write = snd_pcm_oss_proc_write;
+			entry->private_data = pstr;
+			if (snd_info_register(entry) < 0) {
+				snd_info_free_entry(entry);
+				entry = NULL;
+			}
+		}
+		pstr->oss.proc_entry = entry;
+	}
+}
+
+static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
+{
+	int stream;
+	for (stream = 0; stream < 2; ++stream) {
+		struct snd_pcm_str *pstr = &pcm->streams[stream];
+		snd_info_free_entry(pstr->oss.proc_entry);
+		pstr->oss.proc_entry = NULL;
+		snd_pcm_oss_proc_free_setup_list(pstr);
+	}
+}
+#else /* !CONFIG_SND_VERBOSE_PROCFS */
+#define snd_pcm_oss_proc_init(pcm)
+#define snd_pcm_oss_proc_done(pcm)
+#endif /* CONFIG_SND_VERBOSE_PROCFS */
+
+/*
+ *  ENTRY functions
+ */
+
+static const struct file_operations snd_pcm_oss_f_reg =
+{
+	.owner =	THIS_MODULE,
+	.read =		snd_pcm_oss_read,
+	.write =	snd_pcm_oss_write,
+	.open =		snd_pcm_oss_open,
+	.release =	snd_pcm_oss_release,
+	.llseek =	no_llseek,
+	.poll =		snd_pcm_oss_poll,
+	.unlocked_ioctl =	snd_pcm_oss_ioctl,
+	.compat_ioctl =	snd_pcm_oss_ioctl_compat,
+	.mmap =		snd_pcm_oss_mmap,
+};
+
+static void register_oss_dsp(struct snd_pcm *pcm, int index)
+{
+	if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+				    pcm->card, index, &snd_pcm_oss_f_reg,
+				    pcm) < 0) {
+		pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
+			   pcm->card->number, pcm->device);
+	}
+}
+
+static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
+{
+	pcm->oss.reg = 0;
+	if (dsp_map[pcm->card->number] == (int)pcm->device) {
+		char name[128];
+		int duplex;
+		register_oss_dsp(pcm, 0);
+		duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && 
+			      pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && 
+			      !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
+		sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
+#ifdef SNDRV_OSS_INFO_DEV_AUDIO
+		snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
+				      pcm->card->number,
+				      name);
+#endif
+		pcm->oss.reg++;
+		pcm->oss.reg_mask |= 1;
+	}
+	if (adsp_map[pcm->card->number] == (int)pcm->device) {
+		register_oss_dsp(pcm, 1);
+		pcm->oss.reg++;
+		pcm->oss.reg_mask |= 2;
+	}
+
+	if (pcm->oss.reg)
+		snd_pcm_oss_proc_init(pcm);
+
+	return 0;
+}
+
+static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
+{
+	if (pcm->oss.reg) {
+		if (pcm->oss.reg_mask & 1) {
+			pcm->oss.reg_mask &= ~1;
+			snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+						  pcm->card, 0);
+		}
+		if (pcm->oss.reg_mask & 2) {
+			pcm->oss.reg_mask &= ~2;
+			snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+						  pcm->card, 1);
+		}
+		if (dsp_map[pcm->card->number] == (int)pcm->device) {
+#ifdef SNDRV_OSS_INFO_DEV_AUDIO
+			snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
+#endif
+		}
+		pcm->oss.reg = 0;
+	}
+	return 0;
+}
+
+static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
+{
+	snd_pcm_oss_disconnect_minor(pcm);
+	snd_pcm_oss_proc_done(pcm);
+	return 0;
+}
+
+static struct snd_pcm_notify snd_pcm_oss_notify =
+{
+	.n_register =	snd_pcm_oss_register_minor,
+	.n_disconnect = snd_pcm_oss_disconnect_minor,
+	.n_unregister =	snd_pcm_oss_unregister_minor,
+};
+
+static int __init alsa_pcm_oss_init(void)
+{
+	int i;
+	int err;
+
+	/* check device map table */
+	for (i = 0; i < SNDRV_CARDS; i++) {
+		if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
+			pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
+				   i, dsp_map[i]);
+			dsp_map[i] = 0;
+		}
+		if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
+			pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
+				   i, adsp_map[i]);
+			adsp_map[i] = 1;
+		}
+	}
+	if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
+		return err;
+	return 0;
+}
+
+static void __exit alsa_pcm_oss_exit(void)
+{
+	snd_pcm_notify(&snd_pcm_oss_notify, 1);
+}
+
+module_init(alsa_pcm_oss_init)
+module_exit(alsa_pcm_oss_exit)