From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001
From: Srikant Patnaik
Date: Sun, 11 Jan 2015 12:28:04 +0530
Subject: Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
---
 include/sound/pcm.h | 1076 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1076 insertions(+)
 create mode 100644 include/sound/pcm.h

(limited to 'include/sound/pcm.h')

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
new file mode 100644
index 00000000..0d111281
--- /dev/null
+++ b/include/sound/pcm.h
@@ -0,0 +1,1076 @@
+#ifndef __SOUND_PCM_H
+#define __SOUND_PCM_H
+
+/*
+ *  Digital Audio (PCM) abstract layer
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *                   Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <sound/asound.h>
+#include <sound/memalloc.h>
+#include <sound/minors.h>
+#include <linux/poll.h>
+#include <linux/mm.h>
+#include <linux/bitops.h>
+#include <linux/pm_qos.h>
+
+#define snd_pcm_substream_chip(substream) ((substream)->private_data)
+#define snd_pcm_chip(pcm) ((pcm)->private_data)
+
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+#include "pcm_oss.h"
+#endif
+
+/*
+ *  Hardware (lowlevel) section
+ */
+
+struct snd_pcm_hardware {
+	unsigned int info;		/* SNDRV_PCM_INFO_* */
+	u64 formats;			/* SNDRV_PCM_FMTBIT_* */
+	unsigned int rates;		/* SNDRV_PCM_RATE_* */
+	unsigned int rate_min;		/* min rate */
+	unsigned int rate_max;		/* max rate */
+	unsigned int channels_min;	/* min channels */
+	unsigned int channels_max;	/* max channels */
+	size_t buffer_bytes_max;	/* max buffer size */
+	size_t period_bytes_min;	/* min period size */
+	size_t period_bytes_max;	/* max period size */
+	unsigned int periods_min;	/* min # of periods */
+	unsigned int periods_max;	/* max # of periods */
+	size_t fifo_size;		/* fifo size in bytes */
+};
+
+struct snd_pcm_substream;
+
+struct snd_pcm_ops {
+	int (*open)(struct snd_pcm_substream *substream);
+	int (*close)(struct snd_pcm_substream *substream);
+	int (*ioctl)(struct snd_pcm_substream * substream,
+		     unsigned int cmd, void *arg);
+	int (*hw_params)(struct snd_pcm_substream *substream,
+			 struct snd_pcm_hw_params *params);
+	int (*hw_free)(struct snd_pcm_substream *substream);
+	int (*prepare)(struct snd_pcm_substream *substream);
+	int (*trigger)(struct snd_pcm_substream *substream, int cmd);
+	snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
+	int (*copy)(struct snd_pcm_substream *substream, int channel,
+		    snd_pcm_uframes_t pos,
+		    void __user *buf, snd_pcm_uframes_t count);
+	int (*silence)(struct snd_pcm_substream *substream, int channel, 
+		       snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
+	struct page *(*page)(struct snd_pcm_substream *substream,
+			     unsigned long offset);
+	int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
+	int (*ack)(struct snd_pcm_substream *substream);
+};
+
+/*
+ *
+ */
+
+#if defined(CONFIG_SND_DYNAMIC_MINORS)
+#define SNDRV_PCM_DEVICES	(SNDRV_OS_MINORS-2)
+#else
+#define SNDRV_PCM_DEVICES	8
+#endif
+
+#define SNDRV_PCM_IOCTL1_FALSE		((void *)0)
+#define SNDRV_PCM_IOCTL1_TRUE		((void *)1)
+
+#define SNDRV_PCM_IOCTL1_RESET		0
+#define SNDRV_PCM_IOCTL1_INFO		1
+#define SNDRV_PCM_IOCTL1_CHANNEL_INFO	2
+#define SNDRV_PCM_IOCTL1_GSTATE		3
+#define SNDRV_PCM_IOCTL1_FIFO_SIZE	4
+
+#define SNDRV_PCM_TRIGGER_STOP		0
+#define SNDRV_PCM_TRIGGER_START		1
+#define SNDRV_PCM_TRIGGER_PAUSE_PUSH	3
+#define SNDRV_PCM_TRIGGER_PAUSE_RELEASE	4
+#define SNDRV_PCM_TRIGGER_SUSPEND	5
+#define SNDRV_PCM_TRIGGER_RESUME	6
+
+#define SNDRV_PCM_POS_XRUN		((snd_pcm_uframes_t)-1)
+
+/* If you change this don't forget to change rates[] table in pcm_native.c */
+#define SNDRV_PCM_RATE_5512		(1<<0)		/* 5512Hz */
+#define SNDRV_PCM_RATE_8000		(1<<1)		/* 8000Hz */
+#define SNDRV_PCM_RATE_11025		(1<<2)		/* 11025Hz */
+#define SNDRV_PCM_RATE_16000		(1<<3)		/* 16000Hz */
+#define SNDRV_PCM_RATE_22050		(1<<4)		/* 22050Hz */
+#define SNDRV_PCM_RATE_32000		(1<<5)		/* 32000Hz */
+#define SNDRV_PCM_RATE_44100		(1<<6)		/* 44100Hz */
+#define SNDRV_PCM_RATE_48000		(1<<7)		/* 48000Hz */
+#define SNDRV_PCM_RATE_64000		(1<<8)		/* 64000Hz */
+#define SNDRV_PCM_RATE_88200		(1<<9)		/* 88200Hz */
+#define SNDRV_PCM_RATE_96000		(1<<10)		/* 96000Hz */
+#define SNDRV_PCM_RATE_176400		(1<<11)		/* 176400Hz */
+#define SNDRV_PCM_RATE_192000		(1<<12)		/* 192000Hz */
+
+#define SNDRV_PCM_RATE_CONTINUOUS	(1<<30)		/* continuous range */
+#define SNDRV_PCM_RATE_KNOT		(1<<31)		/* supports more non-continuos rates */
+
+#define SNDRV_PCM_RATE_8000_44100	(SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
+					 SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
+					 SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
+#define SNDRV_PCM_RATE_8000_48000	(SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
+#define SNDRV_PCM_RATE_8000_96000	(SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
+					 SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
+#define SNDRV_PCM_RATE_8000_192000	(SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
+					 SNDRV_PCM_RATE_192000)
+#define _SNDRV_PCM_FMTBIT(fmt)		(1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
+#define SNDRV_PCM_FMTBIT_S8		_SNDRV_PCM_FMTBIT(S8)
+#define SNDRV_PCM_FMTBIT_U8		_SNDRV_PCM_FMTBIT(U8)
+#define SNDRV_PCM_FMTBIT_S16_LE		_SNDRV_PCM_FMTBIT(S16_LE)
+#define SNDRV_PCM_FMTBIT_S16_BE		_SNDRV_PCM_FMTBIT(S16_BE)
+#define SNDRV_PCM_FMTBIT_U16_LE		_SNDRV_PCM_FMTBIT(U16_LE)
+#define SNDRV_PCM_FMTBIT_U16_BE		_SNDRV_PCM_FMTBIT(U16_BE)
+#define SNDRV_PCM_FMTBIT_S24_LE		_SNDRV_PCM_FMTBIT(S24_LE)
+#define SNDRV_PCM_FMTBIT_S24_BE		_SNDRV_PCM_FMTBIT(S24_BE)
+#define SNDRV_PCM_FMTBIT_U24_LE		_SNDRV_PCM_FMTBIT(U24_LE)
+#define SNDRV_PCM_FMTBIT_U24_BE		_SNDRV_PCM_FMTBIT(U24_BE)
+#define SNDRV_PCM_FMTBIT_S32_LE		_SNDRV_PCM_FMTBIT(S32_LE)
+#define SNDRV_PCM_FMTBIT_S32_BE		_SNDRV_PCM_FMTBIT(S32_BE)
+#define SNDRV_PCM_FMTBIT_U32_LE		_SNDRV_PCM_FMTBIT(U32_LE)
+#define SNDRV_PCM_FMTBIT_U32_BE		_SNDRV_PCM_FMTBIT(U32_BE)
+#define SNDRV_PCM_FMTBIT_FLOAT_LE	_SNDRV_PCM_FMTBIT(FLOAT_LE)
+#define SNDRV_PCM_FMTBIT_FLOAT_BE	_SNDRV_PCM_FMTBIT(FLOAT_BE)
+#define SNDRV_PCM_FMTBIT_FLOAT64_LE	_SNDRV_PCM_FMTBIT(FLOAT64_LE)
+#define SNDRV_PCM_FMTBIT_FLOAT64_BE	_SNDRV_PCM_FMTBIT(FLOAT64_BE)
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
+#define SNDRV_PCM_FMTBIT_MU_LAW		_SNDRV_PCM_FMTBIT(MU_LAW)
+#define SNDRV_PCM_FMTBIT_A_LAW		_SNDRV_PCM_FMTBIT(A_LAW)
+#define SNDRV_PCM_FMTBIT_IMA_ADPCM	_SNDRV_PCM_FMTBIT(IMA_ADPCM)
+#define SNDRV_PCM_FMTBIT_MPEG		_SNDRV_PCM_FMTBIT(MPEG)
+#define SNDRV_PCM_FMTBIT_GSM		_SNDRV_PCM_FMTBIT(GSM)
+#define SNDRV_PCM_FMTBIT_SPECIAL	_SNDRV_PCM_FMTBIT(SPECIAL)
+#define SNDRV_PCM_FMTBIT_S24_3LE	_SNDRV_PCM_FMTBIT(S24_3LE)
+#define SNDRV_PCM_FMTBIT_U24_3LE	_SNDRV_PCM_FMTBIT(U24_3LE)
+#define SNDRV_PCM_FMTBIT_S24_3BE	_SNDRV_PCM_FMTBIT(S24_3BE)
+#define SNDRV_PCM_FMTBIT_U24_3BE	_SNDRV_PCM_FMTBIT(U24_3BE)
+#define SNDRV_PCM_FMTBIT_S20_3LE	_SNDRV_PCM_FMTBIT(S20_3LE)
+#define SNDRV_PCM_FMTBIT_U20_3LE	_SNDRV_PCM_FMTBIT(U20_3LE)
+#define SNDRV_PCM_FMTBIT_S20_3BE	_SNDRV_PCM_FMTBIT(S20_3BE)
+#define SNDRV_PCM_FMTBIT_U20_3BE	_SNDRV_PCM_FMTBIT(U20_3BE)
+#define SNDRV_PCM_FMTBIT_S18_3LE	_SNDRV_PCM_FMTBIT(S18_3LE)
+#define SNDRV_PCM_FMTBIT_U18_3LE	_SNDRV_PCM_FMTBIT(U18_3LE)
+#define SNDRV_PCM_FMTBIT_S18_3BE	_SNDRV_PCM_FMTBIT(S18_3BE)
+#define SNDRV_PCM_FMTBIT_U18_3BE	_SNDRV_PCM_FMTBIT(U18_3BE)
+#define SNDRV_PCM_FMTBIT_G723_24	_SNDRV_PCM_FMTBIT(G723_24)
+#define SNDRV_PCM_FMTBIT_G723_24_1B	_SNDRV_PCM_FMTBIT(G723_24_1B)
+#define SNDRV_PCM_FMTBIT_G723_40	_SNDRV_PCM_FMTBIT(G723_40)
+#define SNDRV_PCM_FMTBIT_G723_40_1B	_SNDRV_PCM_FMTBIT(G723_40_1B)
+
+#ifdef SNDRV_LITTLE_ENDIAN
+#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_LE
+#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_LE
+#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_LE
+#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_LE
+#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_LE
+#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_LE
+#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_LE
+#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_LE
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
+#endif
+#ifdef SNDRV_BIG_ENDIAN
+#define SNDRV_PCM_FMTBIT_S16		SNDRV_PCM_FMTBIT_S16_BE
+#define SNDRV_PCM_FMTBIT_U16		SNDRV_PCM_FMTBIT_U16_BE
+#define SNDRV_PCM_FMTBIT_S24		SNDRV_PCM_FMTBIT_S24_BE
+#define SNDRV_PCM_FMTBIT_U24		SNDRV_PCM_FMTBIT_U24_BE
+#define SNDRV_PCM_FMTBIT_S32		SNDRV_PCM_FMTBIT_S32_BE
+#define SNDRV_PCM_FMTBIT_U32		SNDRV_PCM_FMTBIT_U32_BE
+#define SNDRV_PCM_FMTBIT_FLOAT		SNDRV_PCM_FMTBIT_FLOAT_BE
+#define SNDRV_PCM_FMTBIT_FLOAT64	SNDRV_PCM_FMTBIT_FLOAT64_BE
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
+#endif
+
+struct snd_pcm_file {
+	struct snd_pcm_substream *substream;
+	int no_compat_mmap;
+};
+
+struct snd_pcm_hw_rule;
+typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
+				      struct snd_pcm_hw_rule *rule);
+
+struct snd_pcm_hw_rule {
+	unsigned int cond;
+	snd_pcm_hw_rule_func_t func;
+	int var;
+	int deps[4];
+	void *private;
+};
+
+struct snd_pcm_hw_constraints {
+	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
+			 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
+	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
+			     SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
+	unsigned int rules_num;
+	unsigned int rules_all;
+	struct snd_pcm_hw_rule *rules;
+};
+
+static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
+					    snd_pcm_hw_param_t var)
+{
+	return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
+}
+
+static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
+						    snd_pcm_hw_param_t var)
+{
+	return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
+}
+
+struct snd_ratnum {
+	unsigned int num;
+	unsigned int den_min, den_max, den_step;
+};
+
+struct snd_ratden {
+	unsigned int num_min, num_max, num_step;
+	unsigned int den;
+};
+
+struct snd_pcm_hw_constraint_ratnums {
+	int nrats;
+	struct snd_ratnum *rats;
+};
+
+struct snd_pcm_hw_constraint_ratdens {
+	int nrats;
+	struct snd_ratden *rats;
+};
+
+struct snd_pcm_hw_constraint_list {
+	unsigned int count;
+	const unsigned int *list;
+	unsigned int mask;
+};
+
+struct snd_pcm_hwptr_log;
+
+struct snd_pcm_runtime {
+	/* -- Status -- */
+	struct snd_pcm_substream *trigger_master;
+	struct timespec trigger_tstamp;	/* trigger timestamp */
+	int overrange;
+	snd_pcm_uframes_t avail_max;
+	snd_pcm_uframes_t hw_ptr_base;	/* Position at buffer restart */
+	snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
+	unsigned long hw_ptr_jiffies;	/* Time when hw_ptr is updated */
+	unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
+	snd_pcm_sframes_t delay;	/* extra delay; typically FIFO size */
+
+	/* -- HW params -- */
+	snd_pcm_access_t access;	/* access mode */
+	snd_pcm_format_t format;	/* SNDRV_PCM_FORMAT_* */
+	snd_pcm_subformat_t subformat;	/* subformat */
+	unsigned int rate;		/* rate in Hz */
+	unsigned int channels;		/* channels */
+	snd_pcm_uframes_t period_size;	/* period size */
+	unsigned int periods;		/* periods */
+	snd_pcm_uframes_t buffer_size;	/* buffer size */
+	snd_pcm_uframes_t min_align;	/* Min alignment for the format */
+	size_t byte_align;
+	unsigned int frame_bits;
+	unsigned int sample_bits;
+	unsigned int info;
+	unsigned int rate_num;
+	unsigned int rate_den;
+	unsigned int no_period_wakeup: 1;
+
+	/* -- SW params -- */
+	int tstamp_mode;		/* mmap timestamp is updated */
+  	unsigned int period_step;
+	snd_pcm_uframes_t start_threshold;
+	snd_pcm_uframes_t stop_threshold;
+	snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
+						noise is nearest than this */
+	snd_pcm_uframes_t silence_size;	/* Silence filling size */
+	snd_pcm_uframes_t boundary;	/* pointers wrap point */
+
+	snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
+	snd_pcm_uframes_t silence_filled; /* size filled with silence */
+
+	union snd_pcm_sync_id sync;	/* hardware synchronization ID */
+
+	/* -- mmap -- */
+	struct snd_pcm_mmap_status *status;
+	struct snd_pcm_mmap_control *control;
+
+	/* -- locking / scheduling -- */
+	snd_pcm_uframes_t twake; 	/* do transfer (!poll) wakeup if non-zero */
+	wait_queue_head_t sleep;	/* poll sleep */
+	wait_queue_head_t tsleep;	/* transfer sleep */
+	struct fasync_struct *fasync;
+
+	/* -- private section -- */
+	void *private_data;
+	void (*private_free)(struct snd_pcm_runtime *runtime);
+
+	/* -- hardware description -- */
+	struct snd_pcm_hardware hw;
+	struct snd_pcm_hw_constraints hw_constraints;
+
+	/* -- interrupt callbacks -- */
+	void (*transfer_ack_begin)(struct snd_pcm_substream *substream);
+	void (*transfer_ack_end)(struct snd_pcm_substream *substream);
+
+	/* -- timer -- */
+	unsigned int timer_resolution;	/* timer resolution */
+	int tstamp_type;		/* timestamp type */
+
+	/* -- DMA -- */           
+	unsigned char *dma_area;	/* DMA area */
+	dma_addr_t dma_addr;		/* physical bus address (not accessible from main CPU) */
+	size_t dma_bytes;		/* size of DMA area */
+
+	struct snd_dma_buffer *dma_buffer_p;	/* allocated buffer */
+
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+	/* -- OSS things -- */
+	struct snd_pcm_oss_runtime oss;
+#endif
+
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
+	struct snd_pcm_hwptr_log *hwptr_log;
+#endif
+};
+
+struct snd_pcm_group {		/* keep linked substreams */
+	spinlock_t lock;
+	struct list_head substreams;
+	int count;
+};
+
+struct pid;
+
+struct snd_pcm_substream {
+	struct snd_pcm *pcm;
+	struct snd_pcm_str *pstr;
+	void *private_data;		/* copied from pcm->private_data */
+	int number;
+	char name[32];			/* substream name */
+	int stream;			/* stream (direction) */
+	struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
+	size_t buffer_bytes_max;	/* limit ring buffer size */
+	struct snd_dma_buffer dma_buffer;
+	unsigned int dma_buf_id;
+	size_t dma_max;
+	/* -- hardware operations -- */
+	struct snd_pcm_ops *ops;
+	/* -- runtime information -- */
+	struct snd_pcm_runtime *runtime;
+        /* -- timer section -- */
+	struct snd_timer *timer;		/* timer */
+	unsigned timer_running: 1;	/* time is running */
+	/* -- next substream -- */
+	struct snd_pcm_substream *next;
+	/* -- linked substreams -- */
+	struct list_head link_list;	/* linked list member */
+	struct snd_pcm_group self_group;	/* fake group for non linked substream (with substream lock inside) */
+	struct snd_pcm_group *group;		/* pointer to current group */
+	/* -- assigned files -- */
+	void *file;
+	int ref_count;
+	atomic_t mmap_count;
+	unsigned int f_flags;
+	void (*pcm_release)(struct snd_pcm_substream *);
+	struct pid *pid;
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+	/* -- OSS things -- */
+	struct snd_pcm_oss_substream oss;
+#endif
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+	struct snd_info_entry *proc_root;
+	struct snd_info_entry *proc_info_entry;
+	struct snd_info_entry *proc_hw_params_entry;
+	struct snd_info_entry *proc_sw_params_entry;
+	struct snd_info_entry *proc_status_entry;
+	struct snd_info_entry *proc_prealloc_entry;
+	struct snd_info_entry *proc_prealloc_max_entry;
+#endif
+	/* misc flags */
+	unsigned int hw_opened: 1;
+};
+
+#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
+
+
+struct snd_pcm_str {
+	int stream;				/* stream (direction) */
+	struct snd_pcm *pcm;
+	/* -- substreams -- */
+	unsigned int substream_count;
+	unsigned int substream_opened;
+	struct snd_pcm_substream *substream;
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+	/* -- OSS things -- */
+	struct snd_pcm_oss_stream oss;
+#endif
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+	struct snd_info_entry *proc_root;
+	struct snd_info_entry *proc_info_entry;
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
+	unsigned int xrun_debug;	/* 0 = disabled, 1 = verbose, 2 = stacktrace */
+	struct snd_info_entry *proc_xrun_debug_entry;
+#endif
+#endif
+};
+
+struct snd_pcm {
+	struct snd_card *card;
+	struct list_head list;
+	int device; /* device number */
+	unsigned int info_flags;
+	unsigned short dev_class;
+	unsigned short dev_subclass;
+	char id[64];
+	char name[80];
+	struct snd_pcm_str streams[2];
+	struct mutex open_mutex;
+	wait_queue_head_t open_wait;
+	void *private_data;
+	void (*private_free) (struct snd_pcm *pcm);
+	struct device *dev; /* actual hw device this belongs to */
+	bool internal; /* pcm is for internal use only */
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+	struct snd_pcm_oss oss;
+#endif
+};
+
+struct snd_pcm_notify {
+	int (*n_register) (struct snd_pcm * pcm);
+	int (*n_disconnect) (struct snd_pcm * pcm);
+	int (*n_unregister) (struct snd_pcm * pcm);
+	struct list_head list;
+};
+
+/*
+ *  Registering
+ */
+
+extern const struct file_operations snd_pcm_f_ops[2];
+
+int snd_pcm_new(struct snd_card *card, const char *id, int device,
+		int playback_count, int capture_count,
+		struct snd_pcm **rpcm);
+int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
+		int playback_count, int capture_count,
+		struct snd_pcm **rpcm);
+int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
+
+int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
+
+/*
+ *  Native I/O
+ */
+
+extern rwlock_t snd_pcm_link_rwlock;
+
+int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
+int snd_pcm_info_user(struct snd_pcm_substream *substream,
+		      struct snd_pcm_info __user *info);
+int snd_pcm_status(struct snd_pcm_substream *substream,
+		   struct snd_pcm_status *status);
+int snd_pcm_start(struct snd_pcm_substream *substream);
+int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
+int snd_pcm_drain_done(struct snd_pcm_substream *substream);
+#ifdef CONFIG_PM
+int snd_pcm_suspend(struct snd_pcm_substream *substream);
+int snd_pcm_suspend_all(struct snd_pcm *pcm);
+#endif
+int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
+int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
+			   struct snd_pcm_substream **rsubstream);
+void snd_pcm_release_substream(struct snd_pcm_substream *substream);
+int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
+			     struct snd_pcm_substream **rsubstream);
+void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
+void snd_pcm_vma_notify_data(void *client, void *data);
+int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
+
+
+#ifdef CONFIG_SND_DEBUG
+void snd_pcm_debug_name(struct snd_pcm_substream *substream,
+			   char *name, size_t len);
+#else
+static inline void
+snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
+{
+	*buf = 0;
+}
+#endif
+
+/*
+ *  PCM library
+ */
+
+static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
+{
+	return substream->group != &substream->self_group;
+}
+
+static inline void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
+{
+	read_lock(&snd_pcm_link_rwlock);
+	spin_lock(&substream->self_group.lock);
+}
+
+static inline void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
+{
+	spin_unlock(&substream->self_group.lock);
+	read_unlock(&snd_pcm_link_rwlock);
+}
+
+static inline void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
+{
+	read_lock_irq(&snd_pcm_link_rwlock);
+	spin_lock(&substream->self_group.lock);
+}
+
+static inline void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
+{
+	spin_unlock(&substream->self_group.lock);
+	read_unlock_irq(&snd_pcm_link_rwlock);
+}
+
+#define snd_pcm_stream_lock_irqsave(substream, flags) \
+do { \
+	read_lock_irqsave(&snd_pcm_link_rwlock, (flags)); \
+	spin_lock(&substream->self_group.lock); \
+} while (0)
+
+#define snd_pcm_stream_unlock_irqrestore(substream, flags) \
+do { \
+	spin_unlock(&substream->self_group.lock); \
+	read_unlock_irqrestore(&snd_pcm_link_rwlock, (flags)); \
+} while (0)
+
+#define snd_pcm_group_for_each_entry(s, substream) \
+	list_for_each_entry(s, &substream->group->substreams, link_list)
+
+static inline int snd_pcm_running(struct snd_pcm_substream *substream)
+{
+	return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
+		(substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
+		 substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
+}
+
+static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
+{
+	return size * 8 / runtime->sample_bits;
+}
+
+static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
+{
+	return size * 8 / runtime->frame_bits;
+}
+
+static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
+{
+	return size * runtime->sample_bits / 8;
+}
+
+static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
+{
+	return size * runtime->frame_bits / 8;
+}
+
+static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
+{
+	return bytes % runtime->byte_align == 0;
+}
+
+static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return frames_to_bytes(runtime, runtime->buffer_size);
+}
+
+static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return frames_to_bytes(runtime, runtime->period_size);
+}
+
+/*
+ *  result is: 0 ... (boundary - 1)
+ */
+static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
+{
+	snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
+	if (avail < 0)
+		avail += runtime->boundary;
+	else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
+		avail -= runtime->boundary;
+	return avail;
+}
+
+/*
+ *  result is: 0 ... (boundary - 1)
+ */
+static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
+{
+	snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
+	if (avail < 0)
+		avail += runtime->boundary;
+	return avail;
+}
+
+static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
+{
+	return runtime->buffer_size - snd_pcm_playback_avail(runtime);
+}
+
+static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
+{
+	return runtime->buffer_size - snd_pcm_capture_avail(runtime);
+}
+
+/**
+ * snd_pcm_playback_ready - check whether the playback buffer is available
+ * @substream: the pcm substream instance
+ *
+ * Checks whether enough free space is available on the playback buffer.
+ *
+ * Returns non-zero if available, or zero if not.
+ */
+static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
+}
+
+/**
+ * snd_pcm_capture_ready - check whether the capture buffer is available
+ * @substream: the pcm substream instance
+ *
+ * Checks whether enough capture data is available on the capture buffer.
+ *
+ * Returns non-zero if available, or zero if not.
+ */
+static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
+}
+
+/**
+ * snd_pcm_playback_data - check whether any data exists on the playback buffer
+ * @substream: the pcm substream instance
+ *
+ * Checks whether any data exists on the playback buffer. If stop_threshold
+ * is bigger or equal to boundary, then this function returns always non-zero.
+ *
+ * Returns non-zero if exists, or zero if not.
+ */
+static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	
+	if (runtime->stop_threshold >= runtime->boundary)
+		return 1;
+	return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
+}
+
+/**
+ * snd_pcm_playback_empty - check whether the playback buffer is empty
+ * @substream: the pcm substream instance
+ *
+ * Checks whether the playback buffer is empty.
+ *
+ * Returns non-zero if empty, or zero if not.
+ */
+static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
+}
+
+/**
+ * snd_pcm_capture_empty - check whether the capture buffer is empty
+ * @substream: the pcm substream instance
+ *
+ * Checks whether the capture buffer is empty.
+ *
+ * Returns non-zero if empty, or zero if not.
+ */
+static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	return snd_pcm_capture_avail(runtime) == 0;
+}
+
+static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, 
+					struct snd_pcm_substream *master)
+{
+	substream->runtime->trigger_master = master;
+}
+
+static inline int hw_is_mask(int var)
+{
+	return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
+		var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
+}
+
+static inline int hw_is_interval(int var)
+{
+	return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
+		var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
+}
+
+static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
+				     snd_pcm_hw_param_t var)
+{
+	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
+}
+
+static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
+					     snd_pcm_hw_param_t var)
+{
+	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
+}
+
+static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
+					     snd_pcm_hw_param_t var)
+{
+	return &params->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
+}
+
+static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
+						     snd_pcm_hw_param_t var)
+{
+	return &params->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
+}
+
+#define params_channels(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min)
+#define params_rate(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_RATE)->min)
+#define params_period_size(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min)
+#define params_periods(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_PERIODS)->min)
+#define params_buffer_size(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min)
+#define params_buffer_bytes(p) \
+	(hw_param_interval_c((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min)
+
+int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
+void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
+void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c);
+void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 
+			  unsigned int k, struct snd_interval *c);
+void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
+			  const struct snd_interval *b, struct snd_interval *c);
+int snd_interval_list(struct snd_interval *i, unsigned int count,
+		      const unsigned int *list, unsigned int mask);
+int snd_interval_ratnum(struct snd_interval *i,
+			unsigned int rats_count, struct snd_ratnum *rats,
+			unsigned int *nump, unsigned int *denp);
+
+void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
+void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
+int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
+
+int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
+
+int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream);
+int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream);
+
+int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
+			       u_int32_t mask);
+int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
+				 u_int64_t mask);
+int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
+				 unsigned int min, unsigned int max);
+int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
+int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 
+			       unsigned int cond,
+			       snd_pcm_hw_param_t var,
+			       struct snd_pcm_hw_constraint_list *l);
+int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 
+				  unsigned int cond,
+				  snd_pcm_hw_param_t var,
+				  struct snd_pcm_hw_constraint_ratnums *r);
+int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 
+				  unsigned int cond,
+				  snd_pcm_hw_param_t var,
+				  struct snd_pcm_hw_constraint_ratdens *r);
+int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 
+				 unsigned int cond,
+				 unsigned int width,
+				 unsigned int msbits);
+int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
+			       unsigned int cond,
+			       snd_pcm_hw_param_t var,
+			       unsigned long step);
+int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
+			       unsigned int cond,
+			       snd_pcm_hw_param_t var);
+int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
+			       unsigned int base_rate);
+int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
+			unsigned int cond,
+			int var,
+			snd_pcm_hw_rule_func_t func, void *private,
+			int dep, ...);
+
+int snd_pcm_format_signed(snd_pcm_format_t format);
+int snd_pcm_format_unsigned(snd_pcm_format_t format);
+int snd_pcm_format_linear(snd_pcm_format_t format);
+int snd_pcm_format_little_endian(snd_pcm_format_t format);
+int snd_pcm_format_big_endian(snd_pcm_format_t format);
+#if 0 /* just for DocBook */
+/**
+ * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
+ * @format: the format to check
+ *
+ * Returns 1 if the given PCM format is CPU-endian, 0 if
+ * opposite, or a negative error code if endian not specified.
+ */
+int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
+#endif /* DocBook */
+#ifdef SNDRV_LITTLE_ENDIAN
+#define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
+#else
+#define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
+#endif
+int snd_pcm_format_width(snd_pcm_format_t format);			/* in bits */
+int snd_pcm_format_physical_width(snd_pcm_format_t format);		/* in bits */
+ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
+const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
+int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
+snd_pcm_format_t snd_pcm_build_linear_format(int width, int unsignd, int big_endian);
+
+void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, struct snd_pcm_ops *ops);
+void snd_pcm_set_sync(struct snd_pcm_substream *substream);
+int snd_pcm_lib_interleave_len(struct snd_pcm_substream *substream);
+int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
+		      unsigned int cmd, void *arg);                      
+int snd_pcm_update_state(struct snd_pcm_substream *substream,
+			 struct snd_pcm_runtime *runtime);
+int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
+int snd_pcm_playback_xrun_check(struct snd_pcm_substream *substream);
+int snd_pcm_capture_xrun_check(struct snd_pcm_substream *substream);
+int snd_pcm_playback_xrun_asap(struct snd_pcm_substream *substream);
+int snd_pcm_capture_xrun_asap(struct snd_pcm_substream *substream);
+void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr);
+void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
+snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream,
+				    const void __user *buf,
+				    snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream,
+				   void __user *buf, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
+				     void __user **bufs, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
+				    void __user **bufs, snd_pcm_uframes_t frames);
+
+extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
+
+int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
+unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
+
+static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
+					      struct snd_dma_buffer *bufp)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	if (bufp) {
+		runtime->dma_buffer_p = bufp;
+		runtime->dma_area = bufp->area;
+		runtime->dma_addr = bufp->addr;
+		runtime->dma_bytes = bufp->bytes;
+	} else {
+		runtime->dma_buffer_p = NULL;
+		runtime->dma_area = NULL;
+		runtime->dma_addr = 0;
+		runtime->dma_bytes = 0;
+	}
+}
+
+/*
+ *  Timer interface
+ */
+
+void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
+void snd_pcm_timer_init(struct snd_pcm_substream *substream);
+void snd_pcm_timer_done(struct snd_pcm_substream *substream);
+
+static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
+				   struct timespec *tv)
+{
+	if (runtime->tstamp_type == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
+		do_posix_clock_monotonic_gettime(tv);
+	else
+		getnstimeofday(tv);
+}
+
+/*
+ *  Memory
+ */
+
+int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
+int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
+int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
+				  int type, struct device *data,
+				  size_t size, size_t max);
+int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
+					  int type, void *data,
+					  size_t size, size_t max);
+int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
+int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
+
+int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
+				      size_t size, gfp_t gfp_flags);
+int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
+struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
+					  unsigned long offset);
+#if 0 /* for kernel-doc */
+/**
+ * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
+ * @substream: the substream to allocate the buffer to
+ * @size: the requested buffer size, in bytes
+ *
+ * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
+ * contiguous in kernel virtual space, but not in physical memory.  Use this
+ * if the buffer is accessed by kernel code but not by device DMA.
+ *
+ * Returns 1 if the buffer was changed, 0 if not changed, or a negative error
+ * code.
+ */
+static int snd_pcm_lib_alloc_vmalloc_buffer
+			(struct snd_pcm_substream *substream, size_t size);
+/**
+ * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
+ * @substream: the substream to allocate the buffer to
+ * @size: the requested buffer size, in bytes
+ *
+ * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
+ * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
+ */
+static int snd_pcm_lib_alloc_vmalloc_32_buffer
+			(struct snd_pcm_substream *substream, size_t size);
+#endif
+#define snd_pcm_lib_alloc_vmalloc_buffer(subs, size) \
+	_snd_pcm_lib_alloc_vmalloc_buffer \
+			(subs, size, GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO)
+#define snd_pcm_lib_alloc_vmalloc_32_buffer(subs, size) \
+	_snd_pcm_lib_alloc_vmalloc_buffer \
+			(subs, size, GFP_KERNEL | GFP_DMA32 | __GFP_ZERO)
+
+#ifdef CONFIG_SND_DMA_SGBUF
+/*
+ * SG-buffer handling
+ */
+#define snd_pcm_substream_sgbuf(substream) \
+	((substream)->runtime->dma_buffer_p->private_data)
+
+static inline dma_addr_t
+snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	return snd_sgbuf_get_addr(sg, ofs);
+}
+
+static inline void *
+snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	return snd_sgbuf_get_ptr(sg, ofs);
+}
+
+struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
+				    unsigned long offset);
+unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
+					  unsigned int ofs, unsigned int size);
+
+#else /* !SND_DMA_SGBUF */
+/*
+ * fake using a continuous buffer
+ */
+static inline dma_addr_t
+snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	return substream->runtime->dma_addr + ofs;
+}
+
+static inline void *
+snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
+{
+	return substream->runtime->dma_area + ofs;
+}
+
+#define snd_pcm_sgbuf_ops_page	NULL
+
+#define snd_pcm_sgbuf_get_chunk_size(subs, ofs, size)	(size)
+
+#endif /* SND_DMA_SGBUF */
+
+/* handle mmap counter - PCM mmap callback should handle this counter properly */
+static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
+{
+	struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
+	atomic_inc(&substream->mmap_count);
+}
+
+static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
+{
+	struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
+	atomic_dec(&substream->mmap_count);
+}
+
+int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
+			     struct vm_area_struct *area);
+/* mmap for io-memory area */
+#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
+#define SNDRV_PCM_INFO_MMAP_IOMEM	SNDRV_PCM_INFO_MMAP
+int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
+#else
+#define SNDRV_PCM_INFO_MMAP_IOMEM	0
+#define snd_pcm_lib_mmap_iomem	NULL
+#endif
+
+#define snd_pcm_lib_mmap_vmalloc NULL
+
+static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
+{
+	*max = dma < 4 ? 64 * 1024 : 128 * 1024;
+}
+
+/*
+ *  Misc
+ */
+
+#define SNDRV_PCM_DEFAULT_CON_SPDIF	(IEC958_AES0_CON_EMPHASIS_NONE|\
+					 (IEC958_AES1_CON_ORIGINAL<<8)|\
+					 (IEC958_AES1_CON_PCM_CODER<<8)|\
+					 (IEC958_AES3_CON_FS_48000<<24))
+
+#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
+
+const char *snd_pcm_format_name(snd_pcm_format_t format);
+
+#endif /* __SOUND_PCM_H */
-- 
cgit