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-rw-r--r--include/sound/pcm.h1040
1 files changed, 1040 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
new file mode 100644
index 000000000000..53fc04d75bad
--- /dev/null
+++ b/include/sound/pcm.h
@@ -0,0 +1,1040 @@
+#ifndef __SOUND_PCM_H
+#define __SOUND_PCM_H
+
+/*
+ * Digital Audio (PCM) abstract layer
+ * Copyright (c) by Jaroslav Kysela <perex@suse.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 <linux/poll.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_chip(pcm) ((pcm)->private_data)
+
+typedef struct _snd_pcm_file snd_pcm_file_t;
+typedef struct _snd_pcm_runtime snd_pcm_runtime_t;
+
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+#include "pcm_oss.h"
+#endif
+
+/*
+ * Hardware (lowlevel) section
+ */
+
+typedef 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 */
+} 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,
+ 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,
+ void __user *buf, snd_pcm_uframes_t count);
+ int (*silence)(snd_pcm_substream_t *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 (*mmap)(snd_pcm_substream_t *substream, struct vm_area_struct *vma);
+ int (*ack)(snd_pcm_substream_t *substream);
+} snd_pcm_ops_t;
+
+/*
+ *
+ */
+
+#define SNDRV_PCM_DEVICES 8
+
+#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_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_S8 (1ULL << SNDRV_PCM_FORMAT_S8)
+#define SNDRV_PCM_FMTBIT_U8 (1ULL << SNDRV_PCM_FORMAT_U8)
+#define SNDRV_PCM_FMTBIT_S16_LE (1ULL << SNDRV_PCM_FORMAT_S16_LE)
+#define SNDRV_PCM_FMTBIT_S16_BE (1ULL << SNDRV_PCM_FORMAT_S16_BE)
+#define SNDRV_PCM_FMTBIT_U16_LE (1ULL << SNDRV_PCM_FORMAT_U16_LE)
+#define SNDRV_PCM_FMTBIT_U16_BE (1ULL << SNDRV_PCM_FORMAT_U16_BE)
+#define SNDRV_PCM_FMTBIT_S24_LE (1ULL << SNDRV_PCM_FORMAT_S24_LE)
+#define SNDRV_PCM_FMTBIT_S24_BE (1ULL << SNDRV_PCM_FORMAT_S24_BE)
+#define SNDRV_PCM_FMTBIT_U24_LE (1ULL << SNDRV_PCM_FORMAT_U24_LE)
+#define SNDRV_PCM_FMTBIT_U24_BE (1ULL << SNDRV_PCM_FORMAT_U24_BE)
+#define SNDRV_PCM_FMTBIT_S32_LE (1ULL << SNDRV_PCM_FORMAT_S32_LE)
+#define SNDRV_PCM_FMTBIT_S32_BE (1ULL << SNDRV_PCM_FORMAT_S32_BE)
+#define SNDRV_PCM_FMTBIT_U32_LE (1ULL << SNDRV_PCM_FORMAT_U32_LE)
+#define SNDRV_PCM_FMTBIT_U32_BE (1ULL << SNDRV_PCM_FORMAT_U32_BE)
+#define SNDRV_PCM_FMTBIT_FLOAT_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT_LE)
+#define SNDRV_PCM_FMTBIT_FLOAT_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT_BE)
+#define SNDRV_PCM_FMTBIT_FLOAT64_LE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_LE)
+#define SNDRV_PCM_FMTBIT_FLOAT64_BE (1ULL << SNDRV_PCM_FORMAT_FLOAT64_BE)
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE)
+#define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE (1ULL << SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE)
+#define SNDRV_PCM_FMTBIT_MU_LAW (1ULL << SNDRV_PCM_FORMAT_MU_LAW)
+#define SNDRV_PCM_FMTBIT_A_LAW (1ULL << SNDRV_PCM_FORMAT_A_LAW)
+#define SNDRV_PCM_FMTBIT_IMA_ADPCM (1ULL << SNDRV_PCM_FORMAT_IMA_ADPCM)
+#define SNDRV_PCM_FMTBIT_MPEG (1ULL << SNDRV_PCM_FORMAT_MPEG)
+#define SNDRV_PCM_FMTBIT_GSM (1ULL << SNDRV_PCM_FORMAT_GSM)
+#define SNDRV_PCM_FMTBIT_SPECIAL (1ULL << SNDRV_PCM_FORMAT_SPECIAL)
+#define SNDRV_PCM_FMTBIT_S24_3LE (1ULL << SNDRV_PCM_FORMAT_S24_3LE)
+#define SNDRV_PCM_FMTBIT_U24_3LE (1ULL << SNDRV_PCM_FORMAT_U24_3LE)
+#define SNDRV_PCM_FMTBIT_S24_3BE (1ULL << SNDRV_PCM_FORMAT_S24_3BE)
+#define SNDRV_PCM_FMTBIT_U24_3BE (1ULL << SNDRV_PCM_FORMAT_U24_3BE)
+#define SNDRV_PCM_FMTBIT_S20_3LE (1ULL << SNDRV_PCM_FORMAT_S20_3LE)
+#define SNDRV_PCM_FMTBIT_U20_3LE (1ULL << SNDRV_PCM_FORMAT_U20_3LE)
+#define SNDRV_PCM_FMTBIT_S20_3BE (1ULL << SNDRV_PCM_FORMAT_S20_3BE)
+#define SNDRV_PCM_FMTBIT_U20_3BE (1ULL << SNDRV_PCM_FORMAT_U20_3BE)
+#define SNDRV_PCM_FMTBIT_S18_3LE (1ULL << SNDRV_PCM_FORMAT_S18_3LE)
+#define SNDRV_PCM_FMTBIT_U18_3LE (1ULL << SNDRV_PCM_FORMAT_U18_3LE)
+#define SNDRV_PCM_FMTBIT_S18_3BE (1ULL << SNDRV_PCM_FORMAT_S18_3BE)
+#define SNDRV_PCM_FMTBIT_U18_3BE (1ULL << SNDRV_PCM_FORMAT_U18_3BE)
+
+#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 {
+ snd_pcm_substream_t * substream;
+ struct _snd_pcm_file * next;
+};
+
+typedef struct _snd_pcm_hw_rule snd_pcm_hw_rule_t;
+
+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 {
+ unsigned int cond;
+ snd_pcm_hw_rule_func_t func;
+ int var;
+ int deps[4];
+ void *private;
+};
+
+typedef struct _snd_pcm_hw_constraints {
+ snd_mask_t masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
+ SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
+ snd_interval_t 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;
+
+static inline snd_mask_t *constrs_mask(snd_pcm_hw_constraints_t *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)
+{
+ return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
+}
+
+typedef struct {
+ unsigned int num;
+ unsigned int den_min, den_max, den_step;
+} ratnum_t;
+
+typedef struct {
+ unsigned int num_min, num_max, num_step;
+ unsigned int den;
+} ratden_t;
+
+typedef struct {
+ int nrats;
+ ratnum_t *rats;
+} snd_pcm_hw_constraint_ratnums_t;
+
+typedef struct {
+ int nrats;
+ ratden_t *rats;
+} snd_pcm_hw_constraint_ratdens_t;
+
+typedef struct {
+ unsigned int count;
+ unsigned int *list;
+ unsigned int mask;
+} snd_pcm_hw_constraint_list_t;
+
+struct _snd_pcm_runtime {
+ /* -- Status -- */
+ snd_pcm_substream_t *trigger_master;
+ snd_timestamp_t 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*/
+
+ /* -- 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 */
+ unsigned int tick_time; /* tick time */
+ 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;
+
+ /* -- SW params -- */
+ int tstamp_timespec; /* use timeval (0) or timespec (1) */
+ snd_pcm_tstamp_t 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 */
+ 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 */
+
+ snd_pcm_sync_id_t sync; /* hardware synchronization ID */
+
+ /* -- mmap -- */
+ volatile snd_pcm_mmap_status_t *status;
+ volatile snd_pcm_mmap_control_t *control;
+ atomic_t mmap_count;
+
+ /* -- locking / scheduling -- */
+ wait_queue_head_t sleep;
+ struct timer_list tick_timer;
+ struct fasync_struct *fasync;
+
+ /* -- private section -- */
+ void *private_data;
+ void (*private_free)(snd_pcm_runtime_t *runtime);
+
+ /* -- hardware description -- */
+ snd_pcm_hardware_t hw;
+ snd_pcm_hw_constraints_t hw_constraints;
+
+ /* -- interrupt callbacks -- */
+ void (*transfer_ack_begin)(snd_pcm_substream_t *substream);
+ void (*transfer_ack_end)(snd_pcm_substream_t *substream);
+
+ /* -- timer -- */
+ unsigned int timer_resolution; /* timer resolution */
+
+ /* -- 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 -- */
+ snd_pcm_oss_runtime_t oss;
+#endif
+};
+
+typedef struct _snd_pcm_group { /* keep linked substreams */
+ spinlock_t lock;
+ struct list_head substreams;
+ int count;
+} snd_pcm_group_t;
+
+struct _snd_pcm_substream {
+ snd_pcm_t *pcm;
+ snd_pcm_str_t *pstr;
+ void *private_data; /* copied from pcm->private_data */
+ int number;
+ char name[32]; /* substream name */
+ int stream; /* stream (direction) */
+ 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 -- */
+ unsigned int open_flag: 1; /* lowlevel device has been opened */
+ snd_pcm_ops_t *ops;
+ /* -- runtime information -- */
+ snd_pcm_runtime_t *runtime;
+ /* -- timer section -- */
+ snd_timer_t *timer; /* timer */
+ unsigned timer_running: 1; /* time is running */
+ spinlock_t timer_lock;
+ /* -- next substream -- */
+ snd_pcm_substream_t *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 */
+ /* -- assigned files -- */
+ snd_pcm_file_t *file;
+ struct file *ffile;
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+ /* -- OSS things -- */
+ snd_pcm_oss_substream_t oss;
+#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 no_mmap_ctrl: 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
+
+
+struct _snd_pcm_str {
+ int stream; /* stream (direction) */
+ snd_pcm_t *pcm;
+ /* -- substreams -- */
+ unsigned int substream_count;
+ unsigned int substream_opened;
+ snd_pcm_substream_t *substream;
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+ /* -- OSS things -- */
+ snd_pcm_oss_stream_t 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
+ unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
+ snd_info_entry_t *proc_xrun_debug_entry;
+#endif
+};
+
+struct _snd_pcm {
+ snd_card_t *card;
+ 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;
+ wait_queue_head_t open_wait;
+ void *private_data;
+ void (*private_free) (snd_pcm_t *pcm);
+#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
+ snd_pcm_oss_t 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 list_head list;
+} snd_pcm_notify_t;
+
+/*
+ * Registering
+ */
+
+extern snd_pcm_t *snd_pcm_devices[];
+extern snd_minor_t snd_pcm_reg[2];
+
+int snd_pcm_new(snd_card_t * 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);
+
+int snd_pcm_notify(snd_pcm_notify_t *notify, int nfree);
+
+/*
+ * Native I/O
+ */
+
+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_drain_done(snd_pcm_substream_t *substream);
+#ifdef CONFIG_PM
+int snd_pcm_suspend(snd_pcm_substream_t *substream);
+int snd_pcm_suspend_all(snd_pcm_t *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_substream(snd_pcm_t *pcm, int stream, snd_pcm_substream_t **rsubstream);
+void snd_pcm_release_substream(snd_pcm_substream_t *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);
+
+#if BITS_PER_LONG >= 64
+
+static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
+{
+ *rem = *n % div;
+ *n /= div;
+}
+
+#elif defined(i386)
+
+static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
+{
+ u_int32_t low, high;
+ low = *n & 0xffffffff;
+ high = *n >> 32;
+ if (high) {
+ u_int32_t high1 = high % div;
+ high /= div;
+ asm("divl %2":"=a" (low), "=d" (*rem):"rm" (div), "a" (low), "d" (high1));
+ *n = (u_int64_t)high << 32 | low;
+ } else {
+ *n = low / div;
+ *rem = low % div;
+ }
+}
+#else
+
+static inline void divl(u_int32_t high, u_int32_t low,
+ u_int32_t div,
+ u_int32_t *q, u_int32_t *r)
+{
+ u_int64_t n = (u_int64_t)high << 32 | low;
+ u_int64_t d = (u_int64_t)div << 31;
+ u_int32_t q1 = 0;
+ int c = 32;
+ while (n > 0xffffffffU) {
+ q1 <<= 1;
+ if (n >= d) {
+ n -= d;
+ q1 |= 1;
+ }
+ d >>= 1;
+ c--;
+ }
+ q1 <<= c;
+ if (n) {
+ low = n;
+ *q = q1 | (low / div);
+ *r = low % div;
+ } else {
+ *r = 0;
+ *q = q1;
+ }
+ return;
+}
+
+static inline void div64_32(u_int64_t *n, u_int32_t div, u_int32_t *rem)
+{
+ u_int32_t low, high;
+ low = *n & 0xffffffff;
+ high = *n >> 32;
+ if (high) {
+ u_int32_t high1 = high % div;
+ u_int32_t low1 = low;
+ high /= div;
+ divl(high1, low1, div, &low, rem);
+ *n = (u_int64_t)high << 32 | low;
+ } else {
+ *n = low / div;
+ *rem = low % div;
+ }
+}
+#endif
+
+/*
+ * PCM library
+ */
+
+static inline int snd_pcm_stream_linked(snd_pcm_substream_t *substream)
+{
+ return substream->group != &substream->self_group;
+}
+
+static inline void snd_pcm_stream_lock(snd_pcm_substream_t *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)
+{
+ 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)
+{
+ 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)
+{
+ 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(pos, substream) \
+ list_for_each(pos, &substream->group->substreams)
+
+#define snd_pcm_group_substream_entry(pos) \
+ list_entry(pos, snd_pcm_substream_t, link_list)
+
+static inline int snd_pcm_running(snd_pcm_substream_t *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)
+{
+ return size * 8 / runtime->sample_bits;
+}
+
+static inline snd_pcm_sframes_t bytes_to_frames(snd_pcm_runtime_t *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)
+{
+ return size * runtime->sample_bits / 8;
+}
+
+static inline ssize_t frames_to_bytes(snd_pcm_runtime_t *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)
+{
+ return bytes % runtime->byte_align == 0;
+}
+
+static inline size_t snd_pcm_lib_buffer_bytes(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *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)
+{
+ snd_pcm_runtime_t *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)
+{
+ 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(snd_pcm_runtime_t *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(snd_pcm_runtime_t *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)
+{
+ 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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ return snd_pcm_capture_avail(runtime) == 0;
+}
+
+static inline void snd_pcm_trigger_done(snd_pcm_substream_t *substream,
+ snd_pcm_substream_t *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 snd_mask_t *hw_param_mask(snd_pcm_hw_params_t *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,
+ 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,
+ snd_pcm_hw_param_t var)
+{
+ return (const snd_mask_t *)hw_param_mask((snd_pcm_hw_params_t*) params, var);
+}
+
+static inline const snd_interval_t *hw_param_interval_c(const snd_pcm_hw_params_t *params,
+ snd_pcm_hw_param_t var)
+{
+ return (const snd_interval_t *)hw_param_interval((snd_pcm_hw_params_t*) params, var);
+}
+
+#define params_access(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_ACCESS))
+#define params_format(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_FORMAT))
+#define params_subformat(p) snd_mask_min(hw_param_mask((p), SNDRV_PCM_HW_PARAM_SUBFORMAT))
+#define params_channels(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_CHANNELS)->min
+#define params_rate(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_RATE)->min
+#define params_period_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min
+#define params_period_bytes(p) ((params_period_size(p)*snd_pcm_format_physical_width(params_format(p))*params_channels(p))/8)
+#define params_periods(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_PERIODS)->min
+#define params_buffer_size(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min
+#define params_buffer_bytes(p) hw_param_interval((p), SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min
+#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_ratnum(snd_interval_t *i,
+ unsigned int rats_count, ratnum_t *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_params(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,
+ u_int32_t mask);
+int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *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,
+ 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,
+ 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,
+ 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,
+ 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,
+ unsigned int cond,
+ unsigned int width,
+ unsigned int msbits);
+int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime,
+ unsigned int cond,
+ snd_pcm_hw_param_t var,
+ unsigned long step);
+int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime,
+ unsigned int cond,
+ snd_pcm_hw_param_t var);
+int snd_pcm_hw_rule_add(snd_pcm_runtime_t *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);
+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 */
+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);
+const char *snd_pcm_format_name(snd_pcm_format_t format);
+
+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,
+ 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);
+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,
+ const void __user *buf,
+ snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_read(snd_pcm_substream_t *substream,
+ void __user *buf, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_writev(snd_pcm_substream_t *substream,
+ void __user **bufs, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_lib_readv(snd_pcm_substream_t *substream,
+ void __user **bufs, snd_pcm_uframes_t frames);
+
+int snd_pcm_limit_hw_rates(snd_pcm_runtime_t *runtime);
+
+static inline void snd_pcm_set_runtime_buffer(snd_pcm_substream_t *substream,
+ struct snd_dma_buffer *bufp)
+{
+ snd_pcm_runtime_t *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);
+
+/*
+ * 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 type, struct device *data,
+ size_t size, size_t max);
+int snd_pcm_lib_preallocate_pages_for_all(snd_pcm_t *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);
+
+#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);
+
+/* handle mmap counter - PCM mmap callback should handle this counter properly */
+static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
+{
+ snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
+ atomic_inc(&substream->runtime->mmap_count);
+}
+
+static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
+{
+ snd_pcm_substream_t *substream = (snd_pcm_substream_t *)area->vm_private_data;
+ atomic_dec(&substream->runtime->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(snd_pcm_substream_t *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)
+{
+ *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))
+
+#endif /* __SOUND_PCM_H */