| #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_kcontrol *chmap_kctl; /* channel-mapping controls */ |
| }; |
| |
| 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 ¶ms->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 ¶ms->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 ¶ms->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 ¶ms->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, |
| const 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); |
| unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
| |
| 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); |
| |
| /** |
| * snd_pcm_stream_str - Get a string naming the direction of a stream |
| * @substream: the pcm substream instance |
| */ |
| static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) |
| { |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| return "Playback"; |
| else |
| return "Capture"; |
| } |
| |
| /* |
| * PCM channel-mapping control API |
| */ |
| /* array element of channel maps */ |
| struct snd_pcm_chmap_elem { |
| unsigned char channels; |
| unsigned char map[15]; |
| }; |
| |
| /* channel map information; retrieved via snd_kcontrol_chip() */ |
| struct snd_pcm_chmap { |
| struct snd_pcm *pcm; /* assigned PCM instance */ |
| int stream; /* PLAYBACK or CAPTURE */ |
| struct snd_kcontrol *kctl; |
| const struct snd_pcm_chmap_elem *chmap; |
| unsigned int max_channels; |
| unsigned int channel_mask; /* optional: active channels bitmask */ |
| void *private_data; /* optional: private data pointer */ |
| }; |
| |
| /* get the PCM substream assigned to the given chmap info */ |
| static inline struct snd_pcm_substream * |
| snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) |
| { |
| struct snd_pcm_substream *s; |
| for (s = info->pcm->streams[info->stream].substream; s; s = s->next) |
| if (s->number == idx) |
| return s; |
| return NULL; |
| } |
| |
| /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ |
| extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; |
| /* Other world's standard channel maps (C/LFE prior to RL/RR) */ |
| extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; |
| |
| /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ |
| #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) |
| #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) |
| #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) |
| |
| int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
| const struct snd_pcm_chmap_elem *chmap, |
| int max_channels, |
| unsigned long private_value, |
| struct snd_pcm_chmap **info_ret); |
| |
| #endif /* __SOUND_PCM_H */ |