X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fsound%2Fpcm.h;h=2f645dfd7f70c59e64f64ab2ad8ff5a2e8588358;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=42293603dac5732462fa118d28fa89096d36c5a8;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 42293603d..2f645dfd7 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -26,39 +26,11 @@
 #include <sound/asound.h>
 #include <sound/memalloc.h>
 #include <linux/poll.h>
+#include <linux/mm.h>
 #include <linux/bitops.h>
 
-typedef sndrv_pcm_uframes_t snd_pcm_uframes_t;
-typedef sndrv_pcm_sframes_t snd_pcm_sframes_t;
-typedef enum sndrv_pcm_class snd_pcm_class_t;
-typedef enum sndrv_pcm_subclass snd_pcm_subclass_t;
-typedef enum sndrv_pcm_stream snd_pcm_stream_t;
-typedef enum sndrv_pcm_access snd_pcm_access_t;
-typedef enum sndrv_pcm_format snd_pcm_format_t;
-typedef enum sndrv_pcm_subformat snd_pcm_subformat_t;
-typedef enum sndrv_pcm_state snd_pcm_state_t;
-typedef union sndrv_pcm_sync_id snd_pcm_sync_id_t;
-typedef struct sndrv_pcm_info snd_pcm_info_t;
-typedef enum sndrv_pcm_hw_param snd_pcm_hw_param_t;
-typedef struct sndrv_pcm_hw_params snd_pcm_hw_params_t;
-typedef enum sndrv_pcm_start snd_pcm_start_t;
-typedef enum sndrv_pcm_xrun snd_pcm_xrun_t;
-typedef enum sndrv_pcm_tstamp snd_pcm_tstamp_t;
-typedef struct sndrv_pcm_sw_params snd_pcm_sw_params_t;
-typedef struct sndrv_pcm_channel_info snd_pcm_channel_info_t;
-typedef struct sndrv_pcm_status snd_pcm_status_t;
-typedef struct sndrv_pcm_mmap_status snd_pcm_mmap_status_t;
-typedef struct sndrv_pcm_mmap_control snd_pcm_mmap_control_t;
-typedef struct sndrv_mask snd_mask_t;
-typedef struct snd_sg_buf snd_pcm_sgbuf_t;
-
-#define _snd_pcm_substream_chip(substream) ((substream)->private_data)
-#define snd_pcm_substream_chip(substream) snd_magic_cast1(chip_t, _snd_pcm_substream_chip(substream), return -ENXIO)
-#define _snd_pcm_chip(pcm) ((pcm)->private_data)
-#define snd_pcm_chip(pcm) snd_magic_cast1(chip_t, _snd_pcm_chip(pcm), return -ENXIO)
-
-typedef struct _snd_pcm_file snd_pcm_file_t;
-typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
+#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"
@@ -68,7 +40,7 @@ typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
  *  Hardware (lowlevel) section
  */
 
-typedef struct _snd_pcm_hardware {
+struct snd_pcm_hardware {
 	unsigned int info;		/* SNDRV_PCM_INFO_* */
 	u64 formats;			/* SNDRV_PCM_FMTBIT_* */
 	unsigned int rates;		/* SNDRV_PCM_RATE_* */
@@ -82,25 +54,29 @@ typedef struct _snd_pcm_hardware {
 	unsigned int periods_min;	/* min # of periods */
 	unsigned int periods_max;	/* max # of periods */
 	size_t fifo_size;		/* fifo size in bytes */
-} snd_pcm_hardware_t;
+};
 
-typedef struct _snd_pcm_ops {
-	int (*open)(snd_pcm_substream_t *substream);
-	int (*close)(snd_pcm_substream_t *substream);
-	int (*ioctl)(snd_pcm_substream_t * 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)(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * params);
-	int (*hw_free)(snd_pcm_substream_t *substream);
-	int (*prepare)(snd_pcm_substream_t * substream);
-	int (*trigger)(snd_pcm_substream_t * substream, int cmd);
-	snd_pcm_uframes_t (*pointer)(snd_pcm_substream_t * substream);
-	int (*copy)(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos,
+	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)(snd_pcm_substream_t *substream, int channel, 
+	int (*silence)(struct snd_pcm_substream *substream, int channel, 
 		       snd_pcm_uframes_t pos, snd_pcm_uframes_t count);
-	struct page *(*page)(snd_pcm_substream_t *substream, unsigned long offset);
-	int (*ack)(snd_pcm_substream_t *substream);
-} snd_pcm_ops_t;
+	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);
+};
 
 /*
  *
@@ -123,6 +99,8 @@ typedef struct _snd_pcm_ops {
 #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 */
@@ -211,17 +189,16 @@ typedef struct _snd_pcm_ops {
 #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
 #endif
 
-struct _snd_pcm_file {
-	snd_pcm_substream_t * substream;
-	struct _snd_pcm_file * next;
+struct snd_pcm_file {
+	struct snd_pcm_substream *substream;
+	int no_compat_mmap;
 };
 
-typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
+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);
 
-typedef int (*snd_pcm_hw_rule_func_t)(snd_pcm_hw_params_t *params,
-				      snd_pcm_hw_rule_t *rule);
-
-struct _snd_pcm_hw_rule {
+struct snd_pcm_hw_rule {
 	unsigned int cond;
 	snd_pcm_hw_rule_func_t func;
 	int var;
@@ -229,58 +206,58 @@ struct _snd_pcm_hw_rule {
 	void *private;
 };
 
-typedef struct _snd_pcm_hw_constraints {
-	snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
+struct snd_pcm_hw_constraints {
+	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
 			 SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
-	snd_interval_t intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
+	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;
-	snd_pcm_hw_rule_t *rules;
-} snd_pcm_hw_constraints_t;
+	struct snd_pcm_hw_rule *rules;
+};
 
-static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *constrs,
-				       snd_pcm_hw_param_t var)
+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 snd_interval_t *constrs_interval(snd_pcm_hw_constraints_t *constrs,
-					  snd_pcm_hw_param_t var)
+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];
 }
 
-typedef struct {
+struct snd_ratnum {
 	unsigned int num;
 	unsigned int den_min, den_max, den_step;
-} ratnum_t;
+};
 
-typedef struct {
+struct snd_ratden {
 	unsigned int num_min, num_max, num_step;
 	unsigned int den;
-} ratden_t;
+};
 
-typedef struct {
+struct snd_pcm_hw_constraint_ratnums {
 	int nrats;
-	ratnum_t *rats;
-} snd_pcm_hw_constraint_ratnums_t;
+	struct snd_ratnum *rats;
+};
 
-typedef struct {
+struct snd_pcm_hw_constraint_ratdens {
 	int nrats;
-	ratden_t *rats;
-} snd_pcm_hw_constraint_ratdens_t;
+	struct snd_ratden *rats;
+};
 
-typedef struct {
+struct snd_pcm_hw_constraint_list {
 	unsigned int count;
 	unsigned int *list;
 	unsigned int mask;
-} snd_pcm_hw_constraint_list_t;
+};
 
-struct _snd_pcm_runtime {
+struct snd_pcm_runtime {
 	/* -- Status -- */
-	snd_pcm_substream_t *trigger_master;
-	snd_timestamp_t trigger_tstamp;	/* trigger timestamp */
+	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 */
@@ -305,8 +282,7 @@ struct _snd_pcm_runtime {
 	unsigned int rate_den;
 
 	/* -- SW params -- */
-	int tstamp_timespec;		/* use timeval (0) or timespec (1) */
-	snd_pcm_tstamp_t tstamp_mode;	/* mmap timestamp is updated */
+	int tstamp_mode;		/* mmap timestamp is updated */
   	unsigned int period_step;
 	unsigned int sleep_min;		/* min ticks to sleep */
 	snd_pcm_uframes_t xfer_align;	/* xfer size need to be a multiple */
@@ -320,12 +296,11 @@ struct _snd_pcm_runtime {
 	snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
 	snd_pcm_uframes_t silence_filled; /* size filled with silence */
 
-	snd_pcm_sync_id_t sync;		/* hardware synchronization ID */
+	union snd_pcm_sync_id sync;	/* hardware synchronization ID */
 
 	/* -- mmap -- */
-	volatile snd_pcm_mmap_status_t *status;
-	volatile snd_pcm_mmap_control_t *control;
-	atomic_t mmap_count;
+	volatile struct snd_pcm_mmap_status *status;
+	volatile struct snd_pcm_mmap_control *control;
 
 	/* -- locking / scheduling -- */
 	wait_queue_head_t sleep;
@@ -334,15 +309,15 @@ struct _snd_pcm_runtime {
 
 	/* -- private section -- */
 	void *private_data;
-	void (*private_free)(snd_pcm_runtime_t *runtime);
+	void (*private_free)(struct snd_pcm_runtime *runtime);
 
 	/* -- hardware description -- */
-	snd_pcm_hardware_t hw;
-	snd_pcm_hw_constraints_t hw_constraints;
+	struct snd_pcm_hardware hw;
+	struct snd_pcm_hw_constraints hw_constraints;
 
 	/* -- interrupt callbacks -- */
-	void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
-	void (*transfer_ack_end)(snd_pcm_substream_t *substream);
+	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 */
@@ -351,126 +326,131 @@ struct _snd_pcm_runtime {
 	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 */
-	void *dma_private;		/* private DMA data for the memory allocator */
+
+	struct snd_dma_buffer *dma_buffer_p;	/* allocated buffer */
 
 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 	/* -- OSS things -- */
-	snd_pcm_oss_runtime_t oss;
+	struct snd_pcm_oss_runtime oss;
 #endif
 };
 
-typedef struct _snd_pcm_group {		/* keep linked substreams */
+struct snd_pcm_group {		/* keep linked substreams */
 	spinlock_t lock;
 	struct list_head substreams;
-} snd_pcm_group_t;
+	int count;
+};
 
-struct _snd_pcm_substream {
-	snd_pcm_t *pcm;
-	snd_pcm_str_t *pstr;
+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) */
+	char latency_id[20];		/* latency identifier */
 	size_t buffer_bytes_max;	/* limit ring buffer size */
-	struct snd_dma_device dma_device;
 	struct snd_dma_buffer dma_buffer;
+	unsigned int dma_buf_id;
 	size_t dma_max;
 	/* -- hardware operations -- */
-	unsigned int open_flag: 1;	/* lowlevel device has been opened */
-	snd_pcm_ops_t *ops;
+	struct snd_pcm_ops *ops;
 	/* -- runtime information -- */
-	snd_pcm_runtime_t *runtime;
+	struct snd_pcm_runtime *runtime;
         /* -- timer section -- */
-	snd_timer_t *timer;		/* timer */
-	int timer_running: 1;		/* time is running */
+	struct snd_timer *timer;		/* timer */
+	unsigned timer_running: 1;	/* time is running */
 	spinlock_t timer_lock;
 	/* -- next substream -- */
-	snd_pcm_substream_t *next;
+	struct snd_pcm_substream *next;
 	/* -- linked substreams -- */
 	struct list_head link_list;	/* linked list member */
-	snd_pcm_group_t self_group;	/* fake group for non linked substream (with substream lock inside) */
-	snd_pcm_group_t *group;		/* pointer to current group */
+	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 -- */
-	snd_pcm_file_t *file;
-	struct file *ffile;
+	void *file;
+	int ref_count;
+	atomic_t mmap_count;
+	unsigned int f_flags;
+	void (*pcm_release)(struct snd_pcm_substream *);
 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 	/* -- OSS things -- */
-	snd_pcm_oss_substream_t oss;
+	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;
 #endif
-	snd_info_entry_t *proc_root;
-	snd_info_entry_t *proc_info_entry;
-	snd_info_entry_t *proc_hw_params_entry;
-	snd_info_entry_t *proc_sw_params_entry;
-	snd_info_entry_t *proc_status_entry;
-	snd_info_entry_t *proc_prealloc_entry;
+	/* misc flags */
+	unsigned int hw_opened: 1;
 };
 
-#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
-#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL || ((substream)->oss.file != NULL))
-#else
-#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
-#endif
+#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
 
 
-struct _snd_pcm_str {
+struct snd_pcm_str {
 	int stream;				/* stream (direction) */
-	snd_pcm_t *pcm;
+	struct snd_pcm *pcm;
 	/* -- substreams -- */
 	unsigned int substream_count;
 	unsigned int substream_opened;
-	snd_pcm_substream_t *substream;
+	struct snd_pcm_substream *substream;
 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 	/* -- OSS things -- */
-	snd_pcm_oss_stream_t oss;
+	struct snd_pcm_oss_stream oss;
 #endif
-	snd_pcm_file_t *files;
-	snd_minor_t *reg;
-	snd_info_entry_t *proc_root;
-	snd_info_entry_t *proc_info_entry;
-#ifdef CONFIG_SND_DEBUG
+#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 */
-	snd_info_entry_t *proc_xrun_debug_entry;
+	struct snd_info_entry *proc_xrun_debug_entry;
+#endif
 #endif
 };
 
-struct _snd_pcm {
-	snd_card_t *card;
+struct snd_pcm {
+	struct snd_card *card;
+	struct list_head list;
 	unsigned int device;	/* device number */
 	unsigned int info_flags;
 	unsigned short dev_class;
 	unsigned short dev_subclass;
 	char id[64];
 	char name[80];
-	snd_pcm_str_t streams[2];
-	struct semaphore open_mutex;
+	struct snd_pcm_str streams[2];
+	struct mutex open_mutex;
 	wait_queue_head_t open_wait;
 	void *private_data;
-	void (*private_free) (snd_pcm_t *pcm);
+	void (*private_free) (struct snd_pcm *pcm);
 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
-	snd_pcm_oss_t oss;
+	struct snd_pcm_oss oss;
 #endif
 };
 
-typedef struct _snd_pcm_notify {
-	int (*n_register) (snd_pcm_t * pcm);
-	int (*n_disconnect) (snd_pcm_t * pcm);
-	int (*n_unregister) (snd_pcm_t * pcm);
+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;
-} snd_pcm_notify_t;
+};
 
 /*
  *  Registering
  */
 
-extern snd_pcm_t *snd_pcm_devices[];
-extern snd_minor_t snd_pcm_reg[2];
+extern struct file_operations snd_pcm_f_ops[2];
 
-int snd_pcm_new(snd_card_t * card, char *id, int device,
+int snd_pcm_new(struct snd_card *card, char *id, int device,
 		int playback_count, int capture_count,
-		snd_pcm_t **rpcm);
-int snd_pcm_new_stream(snd_pcm_t *pcm, int stream, int substream_count);
+		struct snd_pcm **rpcm);
+int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
 
-int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
+int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
 
 /*
  *  Native I/O
@@ -478,27 +458,27 @@ int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
 
 extern rwlock_t snd_pcm_link_rwlock;
 
-int snd_pcm_info(snd_pcm_substream_t * substream, snd_pcm_info_t *info);
-int snd_pcm_info_user(snd_pcm_substream_t * substream, snd_pcm_info_t __user *info);
-int snd_pcm_status(snd_pcm_substream_t * substream, snd_pcm_status_t *status);
-int snd_pcm_prepare(snd_pcm_substream_t *substream);
-int snd_pcm_start(snd_pcm_substream_t *substream);
-int snd_pcm_stop(snd_pcm_substream_t *substream, int status);
+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, int status);
+int snd_pcm_drain_done(struct snd_pcm_substream *substream);
 #ifdef CONFIG_PM
-int snd_pcm_suspend(snd_pcm_substream_t *substream);
-int snd_pcm_suspend_all(snd_pcm_t *pcm);
+int snd_pcm_suspend(struct snd_pcm_substream *substream);
+int snd_pcm_suspend_all(struct snd_pcm *pcm);
 #endif
-int snd_pcm_kernel_playback_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
-int snd_pcm_kernel_capture_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
-int snd_pcm_kernel_ioctl(snd_pcm_substream_t *substream, unsigned int cmd, void *arg);
-int snd_pcm_open(struct inode *inode, struct file *file);
-int snd_pcm_release(struct inode *inode, struct file *file);
-unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait);
-unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait);
-int snd_pcm_open_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
-void snd_pcm_release_substream(snd_pcm_substream_t *substream);
+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(snd_pcm_substream_t *substream, struct file *file, struct vm_area_struct *area);
+int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
 
 #if BITS_PER_LONG >= 64
 
@@ -578,30 +558,30 @@ static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
  *  PCM library
  */
 
-static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
+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(snd_pcm_substream_t *substream)
+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(snd_pcm_substream_t *substream)
+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(snd_pcm_substream_t *substream)
+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(snd_pcm_substream_t *substream)
+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);
@@ -623,56 +603,56 @@ do { \
 	list_for_each(pos, &substream->group->substreams)
 
 #define snd_pcm_group_substream_entry(pos) \
-	list_entry(pos, snd_pcm_substream_t, link_list)
+	list_entry(pos, struct snd_pcm_substream, link_list)
 
-static inline int snd_pcm_running(snd_pcm_substream_t *substream)
+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(snd_pcm_runtime_t *runtime, ssize_t size)
+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(snd_pcm_runtime_t *runtime, ssize_t size)
+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(snd_pcm_runtime_t *runtime, ssize_t size)
+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(snd_pcm_runtime_t *runtime, snd_pcm_sframes_t size)
+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(snd_pcm_runtime_t *runtime, ssize_t bytes)
+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(snd_pcm_substream_t *substream)
+static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
 {
-	snd_pcm_runtime_t *runtime = substream->runtime;
+	struct snd_pcm_runtime *runtime = substream->runtime;
 	return frames_to_bytes(runtime, runtime->buffer_size);
 }
 
-static inline size_t snd_pcm_lib_period_bytes(snd_pcm_substream_t *substream)
+static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
 {
-	snd_pcm_runtime_t *runtime = substream->runtime;
+	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(snd_pcm_runtime_t *runtime)
+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)
@@ -685,7 +665,7 @@ static inline snd_pcm_uframes_t snd_pcm_playback_avail(snd_pcm_runtime_t *runtim
 /*
  *  result is: 0 ... (boundary - 1)
  */
-static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime)
+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)
@@ -693,18 +673,92 @@ static inline snd_pcm_uframes_t snd_pcm_capture_avail(snd_pcm_runtime_t *runtime
 	return avail;
 }
 
-static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(snd_pcm_runtime_t *runtime)
+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(snd_pcm_runtime_t *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);
 }
 
-static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream, 
-					snd_pcm_substream_t *master)
+/**
+ * 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;
 }
@@ -721,28 +775,28 @@ static inline int hw_is_interval(int var)
 		var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
 }
 
-static inline snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *params,
+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 snd_interval_t *hw_param_interval(snd_pcm_hw_params_t *params,
+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 snd_mask_t *hw_param_mask_c(const snd_pcm_hw_params_t *params,
+static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
 					     snd_pcm_hw_param_t var)
 {
-	return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
+	return (const struct snd_mask *)hw_param_mask((struct snd_pcm_hw_params*) params, var);
 }
 
-static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
+static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
 						     snd_pcm_hw_param_t var)
 {
-	return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
+	return (const struct snd_interval *)hw_param_interval((struct snd_pcm_hw_params*) params, var);
 }
 
 #define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
@@ -758,87 +812,58 @@ static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_
 #define params_tick_time(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_TICK_TIME)->min
 
 
-int snd_interval_refine(snd_interval_t *i, const snd_interval_t *v);
-void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
-void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_interval_t *c);
-void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, 
-			  unsigned int k, snd_interval_t *c);
-void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k,
-			  const snd_interval_t *b, snd_interval_t *c);
-int snd_interval_list(snd_interval_t *i, unsigned int count, unsigned int *list, unsigned int mask);
-int snd_interval_step(snd_interval_t *i, unsigned int min, unsigned int step);
-int snd_interval_ratnum(snd_interval_t *i,
-			unsigned int rats_count, ratnum_t *rats,
-			unsigned int *nump, unsigned int *denp);
-int snd_interval_ratden(snd_interval_t *i,
-			unsigned int rats_count, ratden_t *rats,
+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, 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(snd_pcm_hw_params_t *params);
-void _snd_pcm_hw_param_setempty(snd_pcm_hw_params_t *params, snd_pcm_hw_param_t var);
-int snd_pcm_hw_param_min(snd_pcm_substream_t *substream, 
-			 snd_pcm_hw_params_t *params,
-			 snd_pcm_hw_param_t var,
-			 unsigned int val, int *dir);
-int snd_pcm_hw_param_max(snd_pcm_substream_t *substream, 
-			 snd_pcm_hw_params_t *params,
-			 snd_pcm_hw_param_t var,
-			 unsigned int val, int *dir);
-int snd_pcm_hw_param_setinteger(snd_pcm_substream_t *substream, 
-				snd_pcm_hw_params_t *params,
-				snd_pcm_hw_param_t var);
-int snd_pcm_hw_param_first(snd_pcm_substream_t *substream, 
-			   snd_pcm_hw_params_t *params,
-			   snd_pcm_hw_param_t var, int *dir);
-int snd_pcm_hw_param_last(snd_pcm_substream_t *substream, 
-			  snd_pcm_hw_params_t *params,
-			  snd_pcm_hw_param_t var, int *dir);
-int snd_pcm_hw_param_near(snd_pcm_substream_t *substream, 
-			  snd_pcm_hw_params_t *params,
-			  snd_pcm_hw_param_t var, 
-			  unsigned int val, int *dir);
-int snd_pcm_hw_param_set(snd_pcm_substream_t *pcm,
-			 snd_pcm_hw_params_t *params,
-			 snd_pcm_hw_param_t var,
-			 unsigned int val, int dir);
-int snd_pcm_hw_params_choose(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
-
-int snd_pcm_hw_refine(snd_pcm_substream_t *substream, snd_pcm_hw_params_t *params);
-
-int snd_pcm_hw_constraints_init(snd_pcm_substream_t *substream);
-int snd_pcm_hw_constraints_complete(snd_pcm_substream_t *substream);
-
-int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
+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(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
+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(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var,
+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(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var);
-int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, 
+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,
-			       snd_pcm_hw_constraint_list_t *l);
-int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, 
+			       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,
-				  snd_pcm_hw_constraint_ratnums_t *r);
-int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, 
+				  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,
-				  snd_pcm_hw_constraint_ratdens_t *r);
-int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, 
+				  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(snd_pcm_runtime_t *runtime,
+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(snd_pcm_runtime_t *runtime,
+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_add(snd_pcm_runtime_t *runtime,
+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,
@@ -849,77 +874,121 @@ 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 */
-u_int64_t snd_pcm_format_silence_64(snd_pcm_format_t format);
+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);
-ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
-const char *snd_pcm_format_name(snd_pcm_format_t format);
-const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat);
 
-void snd_pcm_set_ops(snd_pcm_t * pcm, int direction, snd_pcm_ops_t *ops);
-void snd_pcm_set_sync(snd_pcm_substream_t * substream);
-int snd_pcm_lib_interleave_len(snd_pcm_substream_t *substream);
-int snd_pcm_lib_ioctl(snd_pcm_substream_t *substream,
+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_hw_ptr(snd_pcm_substream_t *substream);
-int snd_pcm_playback_xrun_check(snd_pcm_substream_t *substream);
-int snd_pcm_capture_xrun_check(snd_pcm_substream_t *substream);
-int snd_pcm_playback_xrun_asap(snd_pcm_substream_t *substream);
-int snd_pcm_capture_xrun_asap(snd_pcm_substream_t *substream);
-void snd_pcm_playback_silence(snd_pcm_substream_t *substream, snd_pcm_uframes_t new_hw_ptr);
-int snd_pcm_playback_ready(snd_pcm_substream_t *substream);
-int snd_pcm_capture_ready(snd_pcm_substream_t *substream);
-long snd_pcm_playback_ready_jiffies(snd_pcm_substream_t *substream);
-long snd_pcm_capture_ready_jiffies(snd_pcm_substream_t *substream);
-int snd_pcm_playback_data(snd_pcm_substream_t *substream);
-int snd_pcm_playback_empty(snd_pcm_substream_t *substream);
-int snd_pcm_capture_empty(snd_pcm_substream_t *substream);
-void snd_pcm_tick_prepare(snd_pcm_substream_t *substream);
-void snd_pcm_tick_set(snd_pcm_substream_t *substream, unsigned long ticks);
-void snd_pcm_tick_elapsed(snd_pcm_substream_t *substream);
-void snd_pcm_period_elapsed(snd_pcm_substream_t *substream);
-snd_pcm_sframes_t snd_pcm_lib_write(snd_pcm_substream_t *substream,
+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_tick_prepare(struct snd_pcm_substream *substream);
+void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks);
+void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream);
+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(snd_pcm_substream_t *substream,
+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(snd_pcm_substream_t *substream,
+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(snd_pcm_substream_t *substream,
+snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
 				    void __user **bufs, snd_pcm_uframes_t frames);
 
-int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
+int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
 
+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(snd_pcm_substream_t *substream);
-void snd_pcm_timer_init(snd_pcm_substream_t * substream);
-void snd_pcm_timer_done(snd_pcm_substream_t * substream);
+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);
 
 /*
  *  Memory
  */
 
-int snd_pcm_lib_preallocate_free(snd_pcm_substream_t *substream);
-int snd_pcm_lib_preallocate_free_for_all(snd_pcm_t *pcm);
-int snd_pcm_lib_preallocate_pages(snd_pcm_substream_t *substream,
+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(snd_pcm_t *pcm,
+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(snd_pcm_substream_t *substream, size_t size);
-int snd_pcm_lib_free_pages(snd_pcm_substream_t *substream);
+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);
 
-#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_private)
+#define snd_pcm_substream_sgbuf(substream) ((substream)->runtime->dma_buffer_p->private_data)
 #define snd_pcm_sgbuf_pages(size) snd_sgbuf_aligned_pages(size)
 #define snd_pcm_sgbuf_get_addr(sgbuf,ofs) snd_sgbuf_get_addr(sgbuf,ofs)
-struct page *snd_pcm_sgbuf_ops_page(snd_pcm_substream_t *substream, unsigned long offset);
+struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigned long offset);
+
+/* 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);
+}
+
+/* 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
 
 static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
 {