| 1 | #ifndef __SOUND_PCM_H |
| 2 | #define __SOUND_PCM_H |
| 3 | |
| 4 | /* |
| 5 | * Digital Audio (PCM) abstract layer |
| 6 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
| 7 | * Abramo Bagnara <abramo@alsa-project.org> |
| 8 | * |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <sound/asound.h> |
| 27 | #include <sound/memalloc.h> |
| 28 | #include <sound/minors.h> |
| 29 | #include <linux/poll.h> |
| 30 | #include <linux/mm.h> |
| 31 | #include <linux/bitops.h> |
| 32 | #include <linux/pm_qos.h> |
| 33 | |
| 34 | #define snd_pcm_substream_chip(substream) ((substream)->private_data) |
| 35 | #define snd_pcm_chip(pcm) ((pcm)->private_data) |
| 36 | |
| 37 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 38 | #include <sound/pcm_oss.h> |
| 39 | #endif |
| 40 | |
| 41 | /* |
| 42 | * Hardware (lowlevel) section |
| 43 | */ |
| 44 | |
| 45 | struct snd_pcm_hardware { |
| 46 | unsigned int info; /* SNDRV_PCM_INFO_* */ |
| 47 | u64 formats; /* SNDRV_PCM_FMTBIT_* */ |
| 48 | unsigned int rates; /* SNDRV_PCM_RATE_* */ |
| 49 | unsigned int rate_min; /* min rate */ |
| 50 | unsigned int rate_max; /* max rate */ |
| 51 | unsigned int channels_min; /* min channels */ |
| 52 | unsigned int channels_max; /* max channels */ |
| 53 | size_t buffer_bytes_max; /* max buffer size */ |
| 54 | size_t period_bytes_min; /* min period size */ |
| 55 | size_t period_bytes_max; /* max period size */ |
| 56 | unsigned int periods_min; /* min # of periods */ |
| 57 | unsigned int periods_max; /* max # of periods */ |
| 58 | size_t fifo_size; /* fifo size in bytes */ |
| 59 | }; |
| 60 | |
| 61 | struct snd_pcm_substream; |
| 62 | |
| 63 | struct snd_pcm_audio_tstamp_config; /* definitions further down */ |
| 64 | struct snd_pcm_audio_tstamp_report; |
| 65 | |
| 66 | struct snd_pcm_ops { |
| 67 | int (*open)(struct snd_pcm_substream *substream); |
| 68 | int (*close)(struct snd_pcm_substream *substream); |
| 69 | int (*ioctl)(struct snd_pcm_substream * substream, |
| 70 | unsigned int cmd, void *arg); |
| 71 | int (*hw_params)(struct snd_pcm_substream *substream, |
| 72 | struct snd_pcm_hw_params *params); |
| 73 | int (*hw_free)(struct snd_pcm_substream *substream); |
| 74 | int (*prepare)(struct snd_pcm_substream *substream); |
| 75 | int (*trigger)(struct snd_pcm_substream *substream, int cmd); |
| 76 | snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream); |
| 77 | int (*get_time_info)(struct snd_pcm_substream *substream, |
| 78 | struct timespec *system_ts, struct timespec *audio_ts, |
| 79 | struct snd_pcm_audio_tstamp_config *audio_tstamp_config, |
| 80 | struct snd_pcm_audio_tstamp_report *audio_tstamp_report); |
| 81 | int (*copy)(struct snd_pcm_substream *substream, int channel, |
| 82 | snd_pcm_uframes_t pos, |
| 83 | void __user *buf, snd_pcm_uframes_t count); |
| 84 | int (*silence)(struct snd_pcm_substream *substream, int channel, |
| 85 | snd_pcm_uframes_t pos, snd_pcm_uframes_t count); |
| 86 | struct page *(*page)(struct snd_pcm_substream *substream, |
| 87 | unsigned long offset); |
| 88 | int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma); |
| 89 | int (*ack)(struct snd_pcm_substream *substream); |
| 90 | }; |
| 91 | |
| 92 | /* |
| 93 | * |
| 94 | */ |
| 95 | |
| 96 | #if defined(CONFIG_SND_DYNAMIC_MINORS) |
| 97 | #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2) |
| 98 | #else |
| 99 | #define SNDRV_PCM_DEVICES 8 |
| 100 | #endif |
| 101 | |
| 102 | #define SNDRV_PCM_IOCTL1_RESET 0 |
| 103 | #define SNDRV_PCM_IOCTL1_INFO 1 |
| 104 | #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2 |
| 105 | #define SNDRV_PCM_IOCTL1_GSTATE 3 |
| 106 | #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4 |
| 107 | |
| 108 | #define SNDRV_PCM_TRIGGER_STOP 0 |
| 109 | #define SNDRV_PCM_TRIGGER_START 1 |
| 110 | #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3 |
| 111 | #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4 |
| 112 | #define SNDRV_PCM_TRIGGER_SUSPEND 5 |
| 113 | #define SNDRV_PCM_TRIGGER_RESUME 6 |
| 114 | #define SNDRV_PCM_TRIGGER_DRAIN 7 |
| 115 | |
| 116 | #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1) |
| 117 | |
| 118 | /* If you change this don't forget to change rates[] table in pcm_native.c */ |
| 119 | #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */ |
| 120 | #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */ |
| 121 | #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */ |
| 122 | #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */ |
| 123 | #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */ |
| 124 | #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */ |
| 125 | #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */ |
| 126 | #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */ |
| 127 | #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */ |
| 128 | #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */ |
| 129 | #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */ |
| 130 | #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */ |
| 131 | #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */ |
| 132 | |
| 133 | #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */ |
| 134 | #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */ |
| 135 | |
| 136 | #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\ |
| 137 | SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\ |
| 138 | SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100) |
| 139 | #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000) |
| 140 | #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\ |
| 141 | SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000) |
| 142 | #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\ |
| 143 | SNDRV_PCM_RATE_192000) |
| 144 | #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt) |
| 145 | #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8) |
| 146 | #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8) |
| 147 | #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE) |
| 148 | #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE) |
| 149 | #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE) |
| 150 | #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE) |
| 151 | #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE) |
| 152 | #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE) |
| 153 | #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE) |
| 154 | #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE) |
| 155 | #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE) |
| 156 | #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE) |
| 157 | #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE) |
| 158 | #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE) |
| 159 | #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE) |
| 160 | #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE) |
| 161 | #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE) |
| 162 | #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE) |
| 163 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE) |
| 164 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE) |
| 165 | #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW) |
| 166 | #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW) |
| 167 | #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM) |
| 168 | #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG) |
| 169 | #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM) |
| 170 | #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL) |
| 171 | #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE) |
| 172 | #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE) |
| 173 | #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE) |
| 174 | #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE) |
| 175 | #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE) |
| 176 | #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE) |
| 177 | #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE) |
| 178 | #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE) |
| 179 | #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE) |
| 180 | #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE) |
| 181 | #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE) |
| 182 | #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE) |
| 183 | #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24) |
| 184 | #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B) |
| 185 | #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40) |
| 186 | #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B) |
| 187 | #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8) |
| 188 | #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE) |
| 189 | #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE) |
| 190 | #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE) |
| 191 | #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE) |
| 192 | |
| 193 | #ifdef SNDRV_LITTLE_ENDIAN |
| 194 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE |
| 195 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE |
| 196 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE |
| 197 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE |
| 198 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE |
| 199 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE |
| 200 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE |
| 201 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE |
| 202 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE |
| 203 | #endif |
| 204 | #ifdef SNDRV_BIG_ENDIAN |
| 205 | #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE |
| 206 | #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE |
| 207 | #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE |
| 208 | #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE |
| 209 | #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE |
| 210 | #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE |
| 211 | #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE |
| 212 | #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE |
| 213 | #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE |
| 214 | #endif |
| 215 | |
| 216 | struct snd_pcm_file { |
| 217 | struct snd_pcm_substream *substream; |
| 218 | int no_compat_mmap; |
| 219 | }; |
| 220 | |
| 221 | struct snd_pcm_hw_rule; |
| 222 | typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params, |
| 223 | struct snd_pcm_hw_rule *rule); |
| 224 | |
| 225 | struct snd_pcm_hw_rule { |
| 226 | unsigned int cond; |
| 227 | int var; |
| 228 | int deps[4]; |
| 229 | |
| 230 | snd_pcm_hw_rule_func_t func; |
| 231 | void *private; |
| 232 | }; |
| 233 | |
| 234 | struct snd_pcm_hw_constraints { |
| 235 | struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - |
| 236 | SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; |
| 237 | struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - |
| 238 | SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1]; |
| 239 | unsigned int rules_num; |
| 240 | unsigned int rules_all; |
| 241 | struct snd_pcm_hw_rule *rules; |
| 242 | }; |
| 243 | |
| 244 | static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs, |
| 245 | snd_pcm_hw_param_t var) |
| 246 | { |
| 247 | return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
| 248 | } |
| 249 | |
| 250 | static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs, |
| 251 | snd_pcm_hw_param_t var) |
| 252 | { |
| 253 | return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
| 254 | } |
| 255 | |
| 256 | struct snd_ratnum { |
| 257 | unsigned int num; |
| 258 | unsigned int den_min, den_max, den_step; |
| 259 | }; |
| 260 | |
| 261 | struct snd_ratden { |
| 262 | unsigned int num_min, num_max, num_step; |
| 263 | unsigned int den; |
| 264 | }; |
| 265 | |
| 266 | struct snd_pcm_hw_constraint_ratnums { |
| 267 | int nrats; |
| 268 | const struct snd_ratnum *rats; |
| 269 | }; |
| 270 | |
| 271 | struct snd_pcm_hw_constraint_ratdens { |
| 272 | int nrats; |
| 273 | const struct snd_ratden *rats; |
| 274 | }; |
| 275 | |
| 276 | struct snd_pcm_hw_constraint_list { |
| 277 | const unsigned int *list; |
| 278 | unsigned int count; |
| 279 | unsigned int mask; |
| 280 | }; |
| 281 | |
| 282 | struct snd_pcm_hw_constraint_ranges { |
| 283 | unsigned int count; |
| 284 | const struct snd_interval *ranges; |
| 285 | unsigned int mask; |
| 286 | }; |
| 287 | |
| 288 | /* |
| 289 | * userspace-provided audio timestamp config to kernel, |
| 290 | * structure is for internal use only and filled with dedicated unpack routine |
| 291 | */ |
| 292 | struct snd_pcm_audio_tstamp_config { |
| 293 | /* 5 of max 16 bits used */ |
| 294 | u32 type_requested:4; |
| 295 | u32 report_delay:1; /* add total delay to A/D or D/A */ |
| 296 | }; |
| 297 | |
| 298 | static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data, |
| 299 | struct snd_pcm_audio_tstamp_config *config) |
| 300 | { |
| 301 | config->type_requested = data & 0xF; |
| 302 | config->report_delay = (data >> 4) & 1; |
| 303 | } |
| 304 | |
| 305 | /* |
| 306 | * kernel-provided audio timestamp report to user-space |
| 307 | * structure is for internal use only and read by dedicated pack routine |
| 308 | */ |
| 309 | struct snd_pcm_audio_tstamp_report { |
| 310 | /* 6 of max 16 bits used for bit-fields */ |
| 311 | |
| 312 | /* for backwards compatibility */ |
| 313 | u32 valid:1; |
| 314 | |
| 315 | /* actual type if hardware could not support requested timestamp */ |
| 316 | u32 actual_type:4; |
| 317 | |
| 318 | /* accuracy represented in ns units */ |
| 319 | u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */ |
| 320 | u32 accuracy; /* up to 4.29s, will be packed in separate field */ |
| 321 | }; |
| 322 | |
| 323 | static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy, |
| 324 | const struct snd_pcm_audio_tstamp_report *report) |
| 325 | { |
| 326 | u32 tmp; |
| 327 | |
| 328 | tmp = report->accuracy_report; |
| 329 | tmp <<= 4; |
| 330 | tmp |= report->actual_type; |
| 331 | tmp <<= 1; |
| 332 | tmp |= report->valid; |
| 333 | |
| 334 | *data &= 0xffff; /* zero-clear MSBs */ |
| 335 | *data |= (tmp << 16); |
| 336 | *accuracy = report->accuracy; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | struct snd_pcm_runtime { |
| 341 | /* -- Status -- */ |
| 342 | struct snd_pcm_substream *trigger_master; |
| 343 | struct timespec trigger_tstamp; /* trigger timestamp */ |
| 344 | bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */ |
| 345 | int overrange; |
| 346 | snd_pcm_uframes_t avail_max; |
| 347 | snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */ |
| 348 | snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */ |
| 349 | unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */ |
| 350 | unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */ |
| 351 | snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */ |
| 352 | u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */ |
| 353 | |
| 354 | /* -- HW params -- */ |
| 355 | snd_pcm_access_t access; /* access mode */ |
| 356 | snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */ |
| 357 | snd_pcm_subformat_t subformat; /* subformat */ |
| 358 | unsigned int rate; /* rate in Hz */ |
| 359 | unsigned int channels; /* channels */ |
| 360 | snd_pcm_uframes_t period_size; /* period size */ |
| 361 | unsigned int periods; /* periods */ |
| 362 | snd_pcm_uframes_t buffer_size; /* buffer size */ |
| 363 | snd_pcm_uframes_t min_align; /* Min alignment for the format */ |
| 364 | size_t byte_align; |
| 365 | unsigned int frame_bits; |
| 366 | unsigned int sample_bits; |
| 367 | unsigned int info; |
| 368 | unsigned int rate_num; |
| 369 | unsigned int rate_den; |
| 370 | unsigned int no_period_wakeup: 1; |
| 371 | |
| 372 | /* -- SW params -- */ |
| 373 | int tstamp_mode; /* mmap timestamp is updated */ |
| 374 | unsigned int period_step; |
| 375 | snd_pcm_uframes_t start_threshold; |
| 376 | snd_pcm_uframes_t stop_threshold; |
| 377 | snd_pcm_uframes_t silence_threshold; /* Silence filling happens when |
| 378 | noise is nearest than this */ |
| 379 | snd_pcm_uframes_t silence_size; /* Silence filling size */ |
| 380 | snd_pcm_uframes_t boundary; /* pointers wrap point */ |
| 381 | |
| 382 | snd_pcm_uframes_t silence_start; /* starting pointer to silence area */ |
| 383 | snd_pcm_uframes_t silence_filled; /* size filled with silence */ |
| 384 | |
| 385 | union snd_pcm_sync_id sync; /* hardware synchronization ID */ |
| 386 | |
| 387 | /* -- mmap -- */ |
| 388 | struct snd_pcm_mmap_status *status; |
| 389 | struct snd_pcm_mmap_control *control; |
| 390 | |
| 391 | /* -- locking / scheduling -- */ |
| 392 | snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */ |
| 393 | wait_queue_head_t sleep; /* poll sleep */ |
| 394 | wait_queue_head_t tsleep; /* transfer sleep */ |
| 395 | struct fasync_struct *fasync; |
| 396 | |
| 397 | /* -- private section -- */ |
| 398 | void *private_data; |
| 399 | void (*private_free)(struct snd_pcm_runtime *runtime); |
| 400 | |
| 401 | /* -- hardware description -- */ |
| 402 | struct snd_pcm_hardware hw; |
| 403 | struct snd_pcm_hw_constraints hw_constraints; |
| 404 | |
| 405 | /* -- timer -- */ |
| 406 | unsigned int timer_resolution; /* timer resolution */ |
| 407 | int tstamp_type; /* timestamp type */ |
| 408 | |
| 409 | /* -- DMA -- */ |
| 410 | unsigned char *dma_area; /* DMA area */ |
| 411 | dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */ |
| 412 | size_t dma_bytes; /* size of DMA area */ |
| 413 | |
| 414 | struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */ |
| 415 | |
| 416 | /* -- audio timestamp config -- */ |
| 417 | struct snd_pcm_audio_tstamp_config audio_tstamp_config; |
| 418 | struct snd_pcm_audio_tstamp_report audio_tstamp_report; |
| 419 | struct timespec driver_tstamp; |
| 420 | |
| 421 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 422 | /* -- OSS things -- */ |
| 423 | struct snd_pcm_oss_runtime oss; |
| 424 | #endif |
| 425 | }; |
| 426 | |
| 427 | struct snd_pcm_group { /* keep linked substreams */ |
| 428 | spinlock_t lock; |
| 429 | struct mutex mutex; |
| 430 | struct list_head substreams; |
| 431 | int count; |
| 432 | }; |
| 433 | |
| 434 | struct pid; |
| 435 | |
| 436 | struct snd_pcm_substream { |
| 437 | struct snd_pcm *pcm; |
| 438 | struct snd_pcm_str *pstr; |
| 439 | void *private_data; /* copied from pcm->private_data */ |
| 440 | int number; |
| 441 | char name[32]; /* substream name */ |
| 442 | int stream; /* stream (direction) */ |
| 443 | struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ |
| 444 | size_t buffer_bytes_max; /* limit ring buffer size */ |
| 445 | struct snd_dma_buffer dma_buffer; |
| 446 | size_t dma_max; |
| 447 | /* -- hardware operations -- */ |
| 448 | const struct snd_pcm_ops *ops; |
| 449 | /* -- runtime information -- */ |
| 450 | struct snd_pcm_runtime *runtime; |
| 451 | /* -- timer section -- */ |
| 452 | struct snd_timer *timer; /* timer */ |
| 453 | unsigned timer_running: 1; /* time is running */ |
| 454 | /* -- next substream -- */ |
| 455 | struct snd_pcm_substream *next; |
| 456 | /* -- linked substreams -- */ |
| 457 | struct list_head link_list; /* linked list member */ |
| 458 | struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */ |
| 459 | struct snd_pcm_group *group; /* pointer to current group */ |
| 460 | /* -- assigned files -- */ |
| 461 | void *file; |
| 462 | int ref_count; |
| 463 | atomic_t mmap_count; |
| 464 | unsigned int f_flags; |
| 465 | void (*pcm_release)(struct snd_pcm_substream *); |
| 466 | struct pid *pid; |
| 467 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 468 | /* -- OSS things -- */ |
| 469 | struct snd_pcm_oss_substream oss; |
| 470 | #endif |
| 471 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
| 472 | struct snd_info_entry *proc_root; |
| 473 | struct snd_info_entry *proc_info_entry; |
| 474 | struct snd_info_entry *proc_hw_params_entry; |
| 475 | struct snd_info_entry *proc_sw_params_entry; |
| 476 | struct snd_info_entry *proc_status_entry; |
| 477 | struct snd_info_entry *proc_prealloc_entry; |
| 478 | struct snd_info_entry *proc_prealloc_max_entry; |
| 479 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 480 | struct snd_info_entry *proc_xrun_injection_entry; |
| 481 | #endif |
| 482 | #endif /* CONFIG_SND_VERBOSE_PROCFS */ |
| 483 | /* misc flags */ |
| 484 | unsigned int hw_opened: 1; |
| 485 | }; |
| 486 | |
| 487 | #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0) |
| 488 | |
| 489 | |
| 490 | struct snd_pcm_str { |
| 491 | int stream; /* stream (direction) */ |
| 492 | struct snd_pcm *pcm; |
| 493 | /* -- substreams -- */ |
| 494 | unsigned int substream_count; |
| 495 | unsigned int substream_opened; |
| 496 | struct snd_pcm_substream *substream; |
| 497 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 498 | /* -- OSS things -- */ |
| 499 | struct snd_pcm_oss_stream oss; |
| 500 | #endif |
| 501 | #ifdef CONFIG_SND_VERBOSE_PROCFS |
| 502 | struct snd_info_entry *proc_root; |
| 503 | struct snd_info_entry *proc_info_entry; |
| 504 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
| 505 | unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */ |
| 506 | struct snd_info_entry *proc_xrun_debug_entry; |
| 507 | #endif |
| 508 | #endif |
| 509 | struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */ |
| 510 | struct device dev; |
| 511 | }; |
| 512 | |
| 513 | struct snd_pcm { |
| 514 | struct snd_card *card; |
| 515 | struct list_head list; |
| 516 | int device; /* device number */ |
| 517 | unsigned int info_flags; |
| 518 | unsigned short dev_class; |
| 519 | unsigned short dev_subclass; |
| 520 | char id[64]; |
| 521 | char name[80]; |
| 522 | struct snd_pcm_str streams[2]; |
| 523 | struct mutex open_mutex; |
| 524 | wait_queue_head_t open_wait; |
| 525 | void *private_data; |
| 526 | void (*private_free) (struct snd_pcm *pcm); |
| 527 | bool internal; /* pcm is for internal use only */ |
| 528 | bool nonatomic; /* whole PCM operations are in non-atomic context */ |
| 529 | #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE) |
| 530 | struct snd_pcm_oss oss; |
| 531 | #endif |
| 532 | }; |
| 533 | |
| 534 | struct snd_pcm_notify { |
| 535 | int (*n_register) (struct snd_pcm * pcm); |
| 536 | int (*n_disconnect) (struct snd_pcm * pcm); |
| 537 | int (*n_unregister) (struct snd_pcm * pcm); |
| 538 | struct list_head list; |
| 539 | }; |
| 540 | |
| 541 | /* |
| 542 | * Registering |
| 543 | */ |
| 544 | |
| 545 | extern const struct file_operations snd_pcm_f_ops[2]; |
| 546 | |
| 547 | int snd_pcm_new(struct snd_card *card, const char *id, int device, |
| 548 | int playback_count, int capture_count, |
| 549 | struct snd_pcm **rpcm); |
| 550 | int snd_pcm_new_internal(struct snd_card *card, const char *id, int device, |
| 551 | int playback_count, int capture_count, |
| 552 | struct snd_pcm **rpcm); |
| 553 | int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count); |
| 554 | |
| 555 | int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree); |
| 556 | |
| 557 | /* |
| 558 | * Native I/O |
| 559 | */ |
| 560 | |
| 561 | int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info); |
| 562 | int snd_pcm_info_user(struct snd_pcm_substream *substream, |
| 563 | struct snd_pcm_info __user *info); |
| 564 | int snd_pcm_status(struct snd_pcm_substream *substream, |
| 565 | struct snd_pcm_status *status); |
| 566 | int snd_pcm_start(struct snd_pcm_substream *substream); |
| 567 | int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status); |
| 568 | int snd_pcm_drain_done(struct snd_pcm_substream *substream); |
| 569 | int snd_pcm_stop_xrun(struct snd_pcm_substream *substream); |
| 570 | #ifdef CONFIG_PM |
| 571 | int snd_pcm_suspend(struct snd_pcm_substream *substream); |
| 572 | int snd_pcm_suspend_all(struct snd_pcm *pcm); |
| 573 | #endif |
| 574 | int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg); |
| 575 | int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file, |
| 576 | struct snd_pcm_substream **rsubstream); |
| 577 | void snd_pcm_release_substream(struct snd_pcm_substream *substream); |
| 578 | int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file, |
| 579 | struct snd_pcm_substream **rsubstream); |
| 580 | void snd_pcm_detach_substream(struct snd_pcm_substream *substream); |
| 581 | int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area); |
| 582 | |
| 583 | |
| 584 | #ifdef CONFIG_SND_DEBUG |
| 585 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, |
| 586 | char *name, size_t len); |
| 587 | #else |
| 588 | static inline void |
| 589 | snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size) |
| 590 | { |
| 591 | *buf = 0; |
| 592 | } |
| 593 | #endif |
| 594 | |
| 595 | /* |
| 596 | * PCM library |
| 597 | */ |
| 598 | |
| 599 | /** |
| 600 | * snd_pcm_stream_linked - Check whether the substream is linked with others |
| 601 | * @substream: substream to check |
| 602 | * |
| 603 | * Returns true if the given substream is being linked with others. |
| 604 | */ |
| 605 | static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream) |
| 606 | { |
| 607 | return substream->group != &substream->self_group; |
| 608 | } |
| 609 | |
| 610 | void snd_pcm_stream_lock(struct snd_pcm_substream *substream); |
| 611 | void snd_pcm_stream_unlock(struct snd_pcm_substream *substream); |
| 612 | void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream); |
| 613 | void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream); |
| 614 | unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream); |
| 615 | |
| 616 | /** |
| 617 | * snd_pcm_stream_lock_irqsave - Lock the PCM stream |
| 618 | * @substream: PCM substream |
| 619 | * @flags: irq flags |
| 620 | * |
| 621 | * This locks the PCM stream like snd_pcm_stream_lock() but with the local |
| 622 | * IRQ (only when nonatomic is false). In nonatomic case, this is identical |
| 623 | * as snd_pcm_stream_lock(). |
| 624 | */ |
| 625 | #define snd_pcm_stream_lock_irqsave(substream, flags) \ |
| 626 | do { \ |
| 627 | typecheck(unsigned long, flags); \ |
| 628 | flags = _snd_pcm_stream_lock_irqsave(substream); \ |
| 629 | } while (0) |
| 630 | void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream, |
| 631 | unsigned long flags); |
| 632 | |
| 633 | /** |
| 634 | * snd_pcm_group_for_each_entry - iterate over the linked substreams |
| 635 | * @s: the iterator |
| 636 | * @substream: the substream |
| 637 | * |
| 638 | * Iterate over the all linked substreams to the given @substream. |
| 639 | * When @substream isn't linked with any others, this gives returns @substream |
| 640 | * itself once. |
| 641 | */ |
| 642 | #define snd_pcm_group_for_each_entry(s, substream) \ |
| 643 | list_for_each_entry(s, &substream->group->substreams, link_list) |
| 644 | |
| 645 | /** |
| 646 | * snd_pcm_running - Check whether the substream is in a running state |
| 647 | * @substream: substream to check |
| 648 | * |
| 649 | * Returns true if the given substream is in the state RUNNING, or in the |
| 650 | * state DRAINING for playback. |
| 651 | */ |
| 652 | static inline int snd_pcm_running(struct snd_pcm_substream *substream) |
| 653 | { |
| 654 | return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING || |
| 655 | (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING && |
| 656 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK)); |
| 657 | } |
| 658 | |
| 659 | /** |
| 660 | * bytes_to_samples - Unit conversion of the size from bytes to samples |
| 661 | * @runtime: PCM runtime instance |
| 662 | * @size: size in bytes |
| 663 | */ |
| 664 | static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size) |
| 665 | { |
| 666 | return size * 8 / runtime->sample_bits; |
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * bytes_to_frames - Unit conversion of the size from bytes to frames |
| 671 | * @runtime: PCM runtime instance |
| 672 | * @size: size in bytes |
| 673 | */ |
| 674 | static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size) |
| 675 | { |
| 676 | return size * 8 / runtime->frame_bits; |
| 677 | } |
| 678 | |
| 679 | /** |
| 680 | * samples_to_bytes - Unit conversion of the size from samples to bytes |
| 681 | * @runtime: PCM runtime instance |
| 682 | * @size: size in samples |
| 683 | */ |
| 684 | static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size) |
| 685 | { |
| 686 | return size * runtime->sample_bits / 8; |
| 687 | } |
| 688 | |
| 689 | /** |
| 690 | * frames_to_bytes - Unit conversion of the size from frames to bytes |
| 691 | * @runtime: PCM runtime instance |
| 692 | * @size: size in frames |
| 693 | */ |
| 694 | static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size) |
| 695 | { |
| 696 | return size * runtime->frame_bits / 8; |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * frame_aligned - Check whether the byte size is aligned to frames |
| 701 | * @runtime: PCM runtime instance |
| 702 | * @bytes: size in bytes |
| 703 | */ |
| 704 | static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes) |
| 705 | { |
| 706 | return bytes % runtime->byte_align == 0; |
| 707 | } |
| 708 | |
| 709 | /** |
| 710 | * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes |
| 711 | * @substream: PCM substream |
| 712 | */ |
| 713 | static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream) |
| 714 | { |
| 715 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 716 | return frames_to_bytes(runtime, runtime->buffer_size); |
| 717 | } |
| 718 | |
| 719 | /** |
| 720 | * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes |
| 721 | * @substream: PCM substream |
| 722 | */ |
| 723 | static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream) |
| 724 | { |
| 725 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 726 | return frames_to_bytes(runtime, runtime->period_size); |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * snd_pcm_playback_avail - Get the available (writable) space for playback |
| 731 | * @runtime: PCM runtime instance |
| 732 | * |
| 733 | * Result is between 0 ... (boundary - 1) |
| 734 | */ |
| 735 | static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime) |
| 736 | { |
| 737 | snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr; |
| 738 | if (avail < 0) |
| 739 | avail += runtime->boundary; |
| 740 | else if ((snd_pcm_uframes_t) avail >= runtime->boundary) |
| 741 | avail -= runtime->boundary; |
| 742 | return avail; |
| 743 | } |
| 744 | |
| 745 | /** |
| 746 | * snd_pcm_playback_avail - Get the available (readable) space for capture |
| 747 | * @runtime: PCM runtime instance |
| 748 | * |
| 749 | * Result is between 0 ... (boundary - 1) |
| 750 | */ |
| 751 | static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime) |
| 752 | { |
| 753 | snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr; |
| 754 | if (avail < 0) |
| 755 | avail += runtime->boundary; |
| 756 | return avail; |
| 757 | } |
| 758 | |
| 759 | /** |
| 760 | * snd_pcm_playback_hw_avail - Get the queued space for playback |
| 761 | * @runtime: PCM runtime instance |
| 762 | */ |
| 763 | static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime) |
| 764 | { |
| 765 | return runtime->buffer_size - snd_pcm_playback_avail(runtime); |
| 766 | } |
| 767 | |
| 768 | /** |
| 769 | * snd_pcm_capture_hw_avail - Get the free space for capture |
| 770 | * @runtime: PCM runtime instance |
| 771 | */ |
| 772 | static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime) |
| 773 | { |
| 774 | return runtime->buffer_size - snd_pcm_capture_avail(runtime); |
| 775 | } |
| 776 | |
| 777 | /** |
| 778 | * snd_pcm_playback_ready - check whether the playback buffer is available |
| 779 | * @substream: the pcm substream instance |
| 780 | * |
| 781 | * Checks whether enough free space is available on the playback buffer. |
| 782 | * |
| 783 | * Return: Non-zero if available, or zero if not. |
| 784 | */ |
| 785 | static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream) |
| 786 | { |
| 787 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 788 | return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min; |
| 789 | } |
| 790 | |
| 791 | /** |
| 792 | * snd_pcm_capture_ready - check whether the capture buffer is available |
| 793 | * @substream: the pcm substream instance |
| 794 | * |
| 795 | * Checks whether enough capture data is available on the capture buffer. |
| 796 | * |
| 797 | * Return: Non-zero if available, or zero if not. |
| 798 | */ |
| 799 | static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream) |
| 800 | { |
| 801 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 802 | return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min; |
| 803 | } |
| 804 | |
| 805 | /** |
| 806 | * snd_pcm_playback_data - check whether any data exists on the playback buffer |
| 807 | * @substream: the pcm substream instance |
| 808 | * |
| 809 | * Checks whether any data exists on the playback buffer. |
| 810 | * |
| 811 | * Return: Non-zero if any data exists, or zero if not. If stop_threshold |
| 812 | * is bigger or equal to boundary, then this function returns always non-zero. |
| 813 | */ |
| 814 | static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream) |
| 815 | { |
| 816 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 817 | |
| 818 | if (runtime->stop_threshold >= runtime->boundary) |
| 819 | return 1; |
| 820 | return snd_pcm_playback_avail(runtime) < runtime->buffer_size; |
| 821 | } |
| 822 | |
| 823 | /** |
| 824 | * snd_pcm_playback_empty - check whether the playback buffer is empty |
| 825 | * @substream: the pcm substream instance |
| 826 | * |
| 827 | * Checks whether the playback buffer is empty. |
| 828 | * |
| 829 | * Return: Non-zero if empty, or zero if not. |
| 830 | */ |
| 831 | static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream) |
| 832 | { |
| 833 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 834 | return snd_pcm_playback_avail(runtime) >= runtime->buffer_size; |
| 835 | } |
| 836 | |
| 837 | /** |
| 838 | * snd_pcm_capture_empty - check whether the capture buffer is empty |
| 839 | * @substream: the pcm substream instance |
| 840 | * |
| 841 | * Checks whether the capture buffer is empty. |
| 842 | * |
| 843 | * Return: Non-zero if empty, or zero if not. |
| 844 | */ |
| 845 | static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream) |
| 846 | { |
| 847 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 848 | return snd_pcm_capture_avail(runtime) == 0; |
| 849 | } |
| 850 | |
| 851 | /** |
| 852 | * snd_pcm_trigger_done - Mark the master substream |
| 853 | * @substream: the pcm substream instance |
| 854 | * @master: the linked master substream |
| 855 | * |
| 856 | * When multiple substreams of the same card are linked and the hardware |
| 857 | * supports the single-shot operation, the driver calls this in the loop |
| 858 | * in snd_pcm_group_for_each_entry() for marking the substream as "done". |
| 859 | * Then most of trigger operations are performed only to the given master |
| 860 | * substream. |
| 861 | * |
| 862 | * The trigger_master mark is cleared at timestamp updates at the end |
| 863 | * of trigger operations. |
| 864 | */ |
| 865 | static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream, |
| 866 | struct snd_pcm_substream *master) |
| 867 | { |
| 868 | substream->runtime->trigger_master = master; |
| 869 | } |
| 870 | |
| 871 | static inline int hw_is_mask(int var) |
| 872 | { |
| 873 | return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK && |
| 874 | var <= SNDRV_PCM_HW_PARAM_LAST_MASK; |
| 875 | } |
| 876 | |
| 877 | static inline int hw_is_interval(int var) |
| 878 | { |
| 879 | return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL && |
| 880 | var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; |
| 881 | } |
| 882 | |
| 883 | static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params, |
| 884 | snd_pcm_hw_param_t var) |
| 885 | { |
| 886 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
| 887 | } |
| 888 | |
| 889 | static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params, |
| 890 | snd_pcm_hw_param_t var) |
| 891 | { |
| 892 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
| 893 | } |
| 894 | |
| 895 | static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params, |
| 896 | snd_pcm_hw_param_t var) |
| 897 | { |
| 898 | return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK]; |
| 899 | } |
| 900 | |
| 901 | static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params, |
| 902 | snd_pcm_hw_param_t var) |
| 903 | { |
| 904 | return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL]; |
| 905 | } |
| 906 | |
| 907 | /** |
| 908 | * params_channels - Get the number of channels from the hw params |
| 909 | * @p: hw params |
| 910 | */ |
| 911 | static inline unsigned int params_channels(const struct snd_pcm_hw_params *p) |
| 912 | { |
| 913 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min; |
| 914 | } |
| 915 | |
| 916 | /** |
| 917 | * params_rate - Get the sample rate from the hw params |
| 918 | * @p: hw params |
| 919 | */ |
| 920 | static inline unsigned int params_rate(const struct snd_pcm_hw_params *p) |
| 921 | { |
| 922 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min; |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * params_period_size - Get the period size (in frames) from the hw params |
| 927 | * @p: hw params |
| 928 | */ |
| 929 | static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p) |
| 930 | { |
| 931 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min; |
| 932 | } |
| 933 | |
| 934 | /** |
| 935 | * params_periods - Get the number of periods from the hw params |
| 936 | * @p: hw params |
| 937 | */ |
| 938 | static inline unsigned int params_periods(const struct snd_pcm_hw_params *p) |
| 939 | { |
| 940 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min; |
| 941 | } |
| 942 | |
| 943 | /** |
| 944 | * params_buffer_size - Get the buffer size (in frames) from the hw params |
| 945 | * @p: hw params |
| 946 | */ |
| 947 | static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p) |
| 948 | { |
| 949 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min; |
| 950 | } |
| 951 | |
| 952 | /** |
| 953 | * params_buffer_bytes - Get the buffer size (in bytes) from the hw params |
| 954 | * @p: hw params |
| 955 | */ |
| 956 | static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p) |
| 957 | { |
| 958 | return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min; |
| 959 | } |
| 960 | |
| 961 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v); |
| 962 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
| 963 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c); |
| 964 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
| 965 | unsigned int k, struct snd_interval *c); |
| 966 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
| 967 | const struct snd_interval *b, struct snd_interval *c); |
| 968 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
| 969 | const unsigned int *list, unsigned int mask); |
| 970 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, |
| 971 | const struct snd_interval *list, unsigned int mask); |
| 972 | int snd_interval_ratnum(struct snd_interval *i, |
| 973 | unsigned int rats_count, const struct snd_ratnum *rats, |
| 974 | unsigned int *nump, unsigned int *denp); |
| 975 | |
| 976 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params); |
| 977 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var); |
| 978 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
| 979 | |
| 980 | int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params); |
| 981 | |
| 982 | int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream); |
| 983 | int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream); |
| 984 | |
| 985 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
| 986 | u_int32_t mask); |
| 987 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
| 988 | u_int64_t mask); |
| 989 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
| 990 | unsigned int min, unsigned int max); |
| 991 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var); |
| 992 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
| 993 | unsigned int cond, |
| 994 | snd_pcm_hw_param_t var, |
| 995 | const struct snd_pcm_hw_constraint_list *l); |
| 996 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, |
| 997 | unsigned int cond, |
| 998 | snd_pcm_hw_param_t var, |
| 999 | const struct snd_pcm_hw_constraint_ranges *r); |
| 1000 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
| 1001 | unsigned int cond, |
| 1002 | snd_pcm_hw_param_t var, |
| 1003 | const struct snd_pcm_hw_constraint_ratnums *r); |
| 1004 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
| 1005 | unsigned int cond, |
| 1006 | snd_pcm_hw_param_t var, |
| 1007 | const struct snd_pcm_hw_constraint_ratdens *r); |
| 1008 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
| 1009 | unsigned int cond, |
| 1010 | unsigned int width, |
| 1011 | unsigned int msbits); |
| 1012 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
| 1013 | unsigned int cond, |
| 1014 | snd_pcm_hw_param_t var, |
| 1015 | unsigned long step); |
| 1016 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
| 1017 | unsigned int cond, |
| 1018 | snd_pcm_hw_param_t var); |
| 1019 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, |
| 1020 | unsigned int base_rate); |
| 1021 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, |
| 1022 | unsigned int cond, |
| 1023 | int var, |
| 1024 | snd_pcm_hw_rule_func_t func, void *private, |
| 1025 | int dep, ...); |
| 1026 | |
| 1027 | /** |
| 1028 | * snd_pcm_hw_constraint_single() - Constrain parameter to a single value |
| 1029 | * @runtime: PCM runtime instance |
| 1030 | * @var: The hw_params variable to constrain |
| 1031 | * @val: The value to constrain to |
| 1032 | * |
| 1033 | * Return: Positive if the value is changed, zero if it's not changed, or a |
| 1034 | * negative error code. |
| 1035 | */ |
| 1036 | static inline int snd_pcm_hw_constraint_single( |
| 1037 | struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
| 1038 | unsigned int val) |
| 1039 | { |
| 1040 | return snd_pcm_hw_constraint_minmax(runtime, var, val, val); |
| 1041 | } |
| 1042 | |
| 1043 | int snd_pcm_format_signed(snd_pcm_format_t format); |
| 1044 | int snd_pcm_format_unsigned(snd_pcm_format_t format); |
| 1045 | int snd_pcm_format_linear(snd_pcm_format_t format); |
| 1046 | int snd_pcm_format_little_endian(snd_pcm_format_t format); |
| 1047 | int snd_pcm_format_big_endian(snd_pcm_format_t format); |
| 1048 | #if 0 /* just for DocBook */ |
| 1049 | /** |
| 1050 | * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian |
| 1051 | * @format: the format to check |
| 1052 | * |
| 1053 | * Return: 1 if the given PCM format is CPU-endian, 0 if |
| 1054 | * opposite, or a negative error code if endian not specified. |
| 1055 | */ |
| 1056 | int snd_pcm_format_cpu_endian(snd_pcm_format_t format); |
| 1057 | #endif /* DocBook */ |
| 1058 | #ifdef SNDRV_LITTLE_ENDIAN |
| 1059 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format) |
| 1060 | #else |
| 1061 | #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format) |
| 1062 | #endif |
| 1063 | int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */ |
| 1064 | int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */ |
| 1065 | ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples); |
| 1066 | const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format); |
| 1067 | int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames); |
| 1068 | |
| 1069 | void snd_pcm_set_ops(struct snd_pcm * pcm, int direction, |
| 1070 | const struct snd_pcm_ops *ops); |
| 1071 | void snd_pcm_set_sync(struct snd_pcm_substream *substream); |
| 1072 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
| 1073 | unsigned int cmd, void *arg); |
| 1074 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
| 1075 | struct snd_pcm_runtime *runtime); |
| 1076 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream); |
| 1077 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr); |
| 1078 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream); |
| 1079 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, |
| 1080 | const void __user *buf, |
| 1081 | snd_pcm_uframes_t frames); |
| 1082 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, |
| 1083 | void __user *buf, snd_pcm_uframes_t frames); |
| 1084 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
| 1085 | void __user **bufs, snd_pcm_uframes_t frames); |
| 1086 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
| 1087 | void __user **bufs, snd_pcm_uframes_t frames); |
| 1088 | |
| 1089 | extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; |
| 1090 | |
| 1091 | int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); |
| 1092 | unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); |
| 1093 | unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit); |
| 1094 | unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a, |
| 1095 | unsigned int rates_b); |
| 1096 | unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min, |
| 1097 | unsigned int rate_max); |
| 1098 | |
| 1099 | /** |
| 1100 | * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer |
| 1101 | * @substream: PCM substream to set |
| 1102 | * @bufp: the buffer information, NULL to clear |
| 1103 | * |
| 1104 | * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL. |
| 1105 | * Otherwise it clears the current buffer information. |
| 1106 | */ |
| 1107 | static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, |
| 1108 | struct snd_dma_buffer *bufp) |
| 1109 | { |
| 1110 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 1111 | if (bufp) { |
| 1112 | runtime->dma_buffer_p = bufp; |
| 1113 | runtime->dma_area = bufp->area; |
| 1114 | runtime->dma_addr = bufp->addr; |
| 1115 | runtime->dma_bytes = bufp->bytes; |
| 1116 | } else { |
| 1117 | runtime->dma_buffer_p = NULL; |
| 1118 | runtime->dma_area = NULL; |
| 1119 | runtime->dma_addr = 0; |
| 1120 | runtime->dma_bytes = 0; |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | /* |
| 1125 | * Timer interface |
| 1126 | */ |
| 1127 | |
| 1128 | #ifdef CONFIG_SND_PCM_TIMER |
| 1129 | void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream); |
| 1130 | void snd_pcm_timer_init(struct snd_pcm_substream *substream); |
| 1131 | void snd_pcm_timer_done(struct snd_pcm_substream *substream); |
| 1132 | #else |
| 1133 | static inline void |
| 1134 | snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {} |
| 1135 | static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {} |
| 1136 | static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {} |
| 1137 | #endif |
| 1138 | /** |
| 1139 | * snd_pcm_gettime - Fill the timespec depending on the timestamp mode |
| 1140 | * @runtime: PCM runtime instance |
| 1141 | * @tv: timespec to fill |
| 1142 | */ |
| 1143 | static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime, |
| 1144 | struct timespec *tv) |
| 1145 | { |
| 1146 | switch (runtime->tstamp_type) { |
| 1147 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC: |
| 1148 | ktime_get_ts(tv); |
| 1149 | break; |
| 1150 | case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW: |
| 1151 | getrawmonotonic(tv); |
| 1152 | break; |
| 1153 | default: |
| 1154 | getnstimeofday(tv); |
| 1155 | break; |
| 1156 | } |
| 1157 | } |
| 1158 | |
| 1159 | /* |
| 1160 | * Memory |
| 1161 | */ |
| 1162 | |
| 1163 | int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream); |
| 1164 | int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm); |
| 1165 | int snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream, |
| 1166 | int type, struct device *data, |
| 1167 | size_t size, size_t max); |
| 1168 | int snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm, |
| 1169 | int type, void *data, |
| 1170 | size_t size, size_t max); |
| 1171 | int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size); |
| 1172 | int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream); |
| 1173 | |
| 1174 | int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream, |
| 1175 | size_t size, gfp_t gfp_flags); |
| 1176 | int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream); |
| 1177 | struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream, |
| 1178 | unsigned long offset); |
| 1179 | /** |
| 1180 | * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer |
| 1181 | * @substream: the substream to allocate the buffer to |
| 1182 | * @size: the requested buffer size, in bytes |
| 1183 | * |
| 1184 | * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is |
| 1185 | * contiguous in kernel virtual space, but not in physical memory. Use this |
| 1186 | * if the buffer is accessed by kernel code but not by device DMA. |
| 1187 | * |
| 1188 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
| 1189 | * code. |
| 1190 | */ |
| 1191 | static inline int snd_pcm_lib_alloc_vmalloc_buffer |
| 1192 | (struct snd_pcm_substream *substream, size_t size) |
| 1193 | { |
| 1194 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, |
| 1195 | GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO); |
| 1196 | } |
| 1197 | |
| 1198 | /** |
| 1199 | * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer |
| 1200 | * @substream: the substream to allocate the buffer to |
| 1201 | * @size: the requested buffer size, in bytes |
| 1202 | * |
| 1203 | * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses |
| 1204 | * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory. |
| 1205 | * |
| 1206 | * Return: 1 if the buffer was changed, 0 if not changed, or a negative error |
| 1207 | * code. |
| 1208 | */ |
| 1209 | static inline int snd_pcm_lib_alloc_vmalloc_32_buffer |
| 1210 | (struct snd_pcm_substream *substream, size_t size) |
| 1211 | { |
| 1212 | return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size, |
| 1213 | GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
| 1214 | } |
| 1215 | |
| 1216 | #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p) |
| 1217 | |
| 1218 | #ifdef CONFIG_SND_DMA_SGBUF |
| 1219 | /* |
| 1220 | * SG-buffer handling |
| 1221 | */ |
| 1222 | #define snd_pcm_substream_sgbuf(substream) \ |
| 1223 | snd_pcm_get_dma_buf(substream)->private_data |
| 1224 | |
| 1225 | struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, |
| 1226 | unsigned long offset); |
| 1227 | #else /* !SND_DMA_SGBUF */ |
| 1228 | /* |
| 1229 | * fake using a continuous buffer |
| 1230 | */ |
| 1231 | #define snd_pcm_sgbuf_ops_page NULL |
| 1232 | #endif /* SND_DMA_SGBUF */ |
| 1233 | |
| 1234 | /** |
| 1235 | * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset |
| 1236 | * @substream: PCM substream |
| 1237 | * @ofs: byte offset |
| 1238 | */ |
| 1239 | static inline dma_addr_t |
| 1240 | snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs) |
| 1241 | { |
| 1242 | return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs); |
| 1243 | } |
| 1244 | |
| 1245 | /** |
| 1246 | * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset |
| 1247 | * @substream: PCM substream |
| 1248 | * @ofs: byte offset |
| 1249 | */ |
| 1250 | static inline void * |
| 1251 | snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs) |
| 1252 | { |
| 1253 | return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs); |
| 1254 | } |
| 1255 | |
| 1256 | /** |
| 1257 | * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig. |
| 1258 | * page from the given size |
| 1259 | * @substream: PCM substream |
| 1260 | * @ofs: byte offset |
| 1261 | * @size: byte size to examine |
| 1262 | */ |
| 1263 | static inline unsigned int |
| 1264 | snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream, |
| 1265 | unsigned int ofs, unsigned int size) |
| 1266 | { |
| 1267 | return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size); |
| 1268 | } |
| 1269 | |
| 1270 | /** |
| 1271 | * snd_pcm_mmap_data_open - increase the mmap counter |
| 1272 | * @area: VMA |
| 1273 | * |
| 1274 | * PCM mmap callback should handle this counter properly |
| 1275 | */ |
| 1276 | static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area) |
| 1277 | { |
| 1278 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
| 1279 | atomic_inc(&substream->mmap_count); |
| 1280 | } |
| 1281 | |
| 1282 | /** |
| 1283 | * snd_pcm_mmap_data_close - decrease the mmap counter |
| 1284 | * @area: VMA |
| 1285 | * |
| 1286 | * PCM mmap callback should handle this counter properly |
| 1287 | */ |
| 1288 | static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area) |
| 1289 | { |
| 1290 | struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data; |
| 1291 | atomic_dec(&substream->mmap_count); |
| 1292 | } |
| 1293 | |
| 1294 | int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream, |
| 1295 | struct vm_area_struct *area); |
| 1296 | /* mmap for io-memory area */ |
| 1297 | #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA) |
| 1298 | #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP |
| 1299 | int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area); |
| 1300 | #else |
| 1301 | #define SNDRV_PCM_INFO_MMAP_IOMEM 0 |
| 1302 | #define snd_pcm_lib_mmap_iomem NULL |
| 1303 | #endif |
| 1304 | |
| 1305 | #define snd_pcm_lib_mmap_vmalloc NULL |
| 1306 | |
| 1307 | /** |
| 1308 | * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer |
| 1309 | * @dma: DMA number |
| 1310 | * @max: pointer to store the max size |
| 1311 | */ |
| 1312 | static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max) |
| 1313 | { |
| 1314 | *max = dma < 4 ? 64 * 1024 : 128 * 1024; |
| 1315 | } |
| 1316 | |
| 1317 | /* |
| 1318 | * Misc |
| 1319 | */ |
| 1320 | |
| 1321 | #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\ |
| 1322 | (IEC958_AES1_CON_ORIGINAL<<8)|\ |
| 1323 | (IEC958_AES1_CON_PCM_CODER<<8)|\ |
| 1324 | (IEC958_AES3_CON_FS_48000<<24)) |
| 1325 | |
| 1326 | #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime) |
| 1327 | |
| 1328 | const char *snd_pcm_format_name(snd_pcm_format_t format); |
| 1329 | |
| 1330 | /** |
| 1331 | * snd_pcm_stream_str - Get a string naming the direction of a stream |
| 1332 | * @substream: the pcm substream instance |
| 1333 | * |
| 1334 | * Return: A string naming the direction of the stream. |
| 1335 | */ |
| 1336 | static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream) |
| 1337 | { |
| 1338 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 1339 | return "Playback"; |
| 1340 | else |
| 1341 | return "Capture"; |
| 1342 | } |
| 1343 | |
| 1344 | /* |
| 1345 | * PCM channel-mapping control API |
| 1346 | */ |
| 1347 | /* array element of channel maps */ |
| 1348 | struct snd_pcm_chmap_elem { |
| 1349 | unsigned char channels; |
| 1350 | unsigned char map[15]; |
| 1351 | }; |
| 1352 | |
| 1353 | /* channel map information; retrieved via snd_kcontrol_chip() */ |
| 1354 | struct snd_pcm_chmap { |
| 1355 | struct snd_pcm *pcm; /* assigned PCM instance */ |
| 1356 | int stream; /* PLAYBACK or CAPTURE */ |
| 1357 | struct snd_kcontrol *kctl; |
| 1358 | const struct snd_pcm_chmap_elem *chmap; |
| 1359 | unsigned int max_channels; |
| 1360 | unsigned int channel_mask; /* optional: active channels bitmask */ |
| 1361 | void *private_data; /* optional: private data pointer */ |
| 1362 | }; |
| 1363 | |
| 1364 | /** |
| 1365 | * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info |
| 1366 | * @info: chmap information |
| 1367 | * @idx: the substream number index |
| 1368 | */ |
| 1369 | static inline struct snd_pcm_substream * |
| 1370 | snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx) |
| 1371 | { |
| 1372 | struct snd_pcm_substream *s; |
| 1373 | for (s = info->pcm->streams[info->stream].substream; s; s = s->next) |
| 1374 | if (s->number == idx) |
| 1375 | return s; |
| 1376 | return NULL; |
| 1377 | } |
| 1378 | |
| 1379 | /* ALSA-standard channel maps (RL/RR prior to C/LFE) */ |
| 1380 | extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[]; |
| 1381 | /* Other world's standard channel maps (C/LFE prior to RL/RR) */ |
| 1382 | extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[]; |
| 1383 | |
| 1384 | /* bit masks to be passed to snd_pcm_chmap.channel_mask field */ |
| 1385 | #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4)) |
| 1386 | #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6)) |
| 1387 | #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8)) |
| 1388 | |
| 1389 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, |
| 1390 | const struct snd_pcm_chmap_elem *chmap, |
| 1391 | int max_channels, |
| 1392 | unsigned long private_value, |
| 1393 | struct snd_pcm_chmap **info_ret); |
| 1394 | |
| 1395 | /** |
| 1396 | * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise |
| 1397 | * @pcm_format: PCM format |
| 1398 | */ |
| 1399 | static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) |
| 1400 | { |
| 1401 | return 1ULL << (__force int) pcm_format; |
| 1402 | } |
| 1403 | |
| 1404 | /* printk helpers */ |
| 1405 | #define pcm_err(pcm, fmt, args...) \ |
| 1406 | dev_err((pcm)->card->dev, fmt, ##args) |
| 1407 | #define pcm_warn(pcm, fmt, args...) \ |
| 1408 | dev_warn((pcm)->card->dev, fmt, ##args) |
| 1409 | #define pcm_dbg(pcm, fmt, args...) \ |
| 1410 | dev_dbg((pcm)->card->dev, fmt, ##args) |
| 1411 | |
| 1412 | #endif /* __SOUND_PCM_H */ |