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1 : : /* SPDX-License-Identifier: GPL-2.0-or-later */
2 : : #ifndef __SOUND_PCM_H
3 : : #define __SOUND_PCM_H
4 : :
5 : : /*
6 : : * Digital Audio (PCM) abstract layer
7 : : * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
8 : : * Abramo Bagnara <abramo@alsa-project.org>
9 : : */
10 : :
11 : : #include <sound/asound.h>
12 : : #include <sound/memalloc.h>
13 : : #include <sound/minors.h>
14 : : #include <linux/poll.h>
15 : : #include <linux/mm.h>
16 : : #include <linux/bitops.h>
17 : : #include <linux/pm_qos.h>
18 : : #include <linux/refcount.h>
19 : :
20 : : #define snd_pcm_substream_chip(substream) ((substream)->private_data)
21 : : #define snd_pcm_chip(pcm) ((pcm)->private_data)
22 : :
23 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
24 : : #include <sound/pcm_oss.h>
25 : : #endif
26 : :
27 : : /*
28 : : * Hardware (lowlevel) section
29 : : */
30 : :
31 : : struct snd_pcm_hardware {
32 : : unsigned int info; /* SNDRV_PCM_INFO_* */
33 : : u64 formats; /* SNDRV_PCM_FMTBIT_* */
34 : : unsigned int rates; /* SNDRV_PCM_RATE_* */
35 : : unsigned int rate_min; /* min rate */
36 : : unsigned int rate_max; /* max rate */
37 : : unsigned int channels_min; /* min channels */
38 : : unsigned int channels_max; /* max channels */
39 : : size_t buffer_bytes_max; /* max buffer size */
40 : : size_t period_bytes_min; /* min period size */
41 : : size_t period_bytes_max; /* max period size */
42 : : unsigned int periods_min; /* min # of periods */
43 : : unsigned int periods_max; /* max # of periods */
44 : : size_t fifo_size; /* fifo size in bytes */
45 : : };
46 : :
47 : : struct snd_pcm_substream;
48 : :
49 : : struct snd_pcm_audio_tstamp_config; /* definitions further down */
50 : : struct snd_pcm_audio_tstamp_report;
51 : :
52 : : struct snd_pcm_ops {
53 : : int (*open)(struct snd_pcm_substream *substream);
54 : : int (*close)(struct snd_pcm_substream *substream);
55 : : int (*ioctl)(struct snd_pcm_substream * substream,
56 : : unsigned int cmd, void *arg);
57 : : int (*hw_params)(struct snd_pcm_substream *substream,
58 : : struct snd_pcm_hw_params *params);
59 : : int (*hw_free)(struct snd_pcm_substream *substream);
60 : : int (*prepare)(struct snd_pcm_substream *substream);
61 : : int (*trigger)(struct snd_pcm_substream *substream, int cmd);
62 : : snd_pcm_uframes_t (*pointer)(struct snd_pcm_substream *substream);
63 : : int (*get_time_info)(struct snd_pcm_substream *substream,
64 : : struct timespec *system_ts, struct timespec *audio_ts,
65 : : struct snd_pcm_audio_tstamp_config *audio_tstamp_config,
66 : : struct snd_pcm_audio_tstamp_report *audio_tstamp_report);
67 : : int (*fill_silence)(struct snd_pcm_substream *substream, int channel,
68 : : unsigned long pos, unsigned long bytes);
69 : : int (*copy_user)(struct snd_pcm_substream *substream, int channel,
70 : : unsigned long pos, void __user *buf,
71 : : unsigned long bytes);
72 : : int (*copy_kernel)(struct snd_pcm_substream *substream, int channel,
73 : : unsigned long pos, void *buf, unsigned long bytes);
74 : : struct page *(*page)(struct snd_pcm_substream *substream,
75 : : unsigned long offset);
76 : : int (*mmap)(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
77 : : int (*ack)(struct snd_pcm_substream *substream);
78 : : };
79 : :
80 : : /*
81 : : *
82 : : */
83 : :
84 : : #if defined(CONFIG_SND_DYNAMIC_MINORS)
85 : : #define SNDRV_PCM_DEVICES (SNDRV_OS_MINORS-2)
86 : : #else
87 : : #define SNDRV_PCM_DEVICES 8
88 : : #endif
89 : :
90 : : #define SNDRV_PCM_IOCTL1_RESET 0
91 : : /* 1 is absent slot. */
92 : : #define SNDRV_PCM_IOCTL1_CHANNEL_INFO 2
93 : : /* 3 is absent slot. */
94 : : #define SNDRV_PCM_IOCTL1_FIFO_SIZE 4
95 : :
96 : : #define SNDRV_PCM_TRIGGER_STOP 0
97 : : #define SNDRV_PCM_TRIGGER_START 1
98 : : #define SNDRV_PCM_TRIGGER_PAUSE_PUSH 3
99 : : #define SNDRV_PCM_TRIGGER_PAUSE_RELEASE 4
100 : : #define SNDRV_PCM_TRIGGER_SUSPEND 5
101 : : #define SNDRV_PCM_TRIGGER_RESUME 6
102 : : #define SNDRV_PCM_TRIGGER_DRAIN 7
103 : :
104 : : #define SNDRV_PCM_POS_XRUN ((snd_pcm_uframes_t)-1)
105 : :
106 : : /* If you change this don't forget to change rates[] table in pcm_native.c */
107 : : #define SNDRV_PCM_RATE_5512 (1<<0) /* 5512Hz */
108 : : #define SNDRV_PCM_RATE_8000 (1<<1) /* 8000Hz */
109 : : #define SNDRV_PCM_RATE_11025 (1<<2) /* 11025Hz */
110 : : #define SNDRV_PCM_RATE_16000 (1<<3) /* 16000Hz */
111 : : #define SNDRV_PCM_RATE_22050 (1<<4) /* 22050Hz */
112 : : #define SNDRV_PCM_RATE_32000 (1<<5) /* 32000Hz */
113 : : #define SNDRV_PCM_RATE_44100 (1<<6) /* 44100Hz */
114 : : #define SNDRV_PCM_RATE_48000 (1<<7) /* 48000Hz */
115 : : #define SNDRV_PCM_RATE_64000 (1<<8) /* 64000Hz */
116 : : #define SNDRV_PCM_RATE_88200 (1<<9) /* 88200Hz */
117 : : #define SNDRV_PCM_RATE_96000 (1<<10) /* 96000Hz */
118 : : #define SNDRV_PCM_RATE_176400 (1<<11) /* 176400Hz */
119 : : #define SNDRV_PCM_RATE_192000 (1<<12) /* 192000Hz */
120 : : #define SNDRV_PCM_RATE_352800 (1<<13) /* 352800Hz */
121 : : #define SNDRV_PCM_RATE_384000 (1<<14) /* 384000Hz */
122 : :
123 : : #define SNDRV_PCM_RATE_CONTINUOUS (1<<30) /* continuous range */
124 : : #define SNDRV_PCM_RATE_KNOT (1<<31) /* supports more non-continuos rates */
125 : :
126 : : #define SNDRV_PCM_RATE_8000_44100 (SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_11025|\
127 : : SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_22050|\
128 : : SNDRV_PCM_RATE_32000|SNDRV_PCM_RATE_44100)
129 : : #define SNDRV_PCM_RATE_8000_48000 (SNDRV_PCM_RATE_8000_44100|SNDRV_PCM_RATE_48000)
130 : : #define SNDRV_PCM_RATE_8000_96000 (SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_64000|\
131 : : SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000)
132 : : #define SNDRV_PCM_RATE_8000_192000 (SNDRV_PCM_RATE_8000_96000|SNDRV_PCM_RATE_176400|\
133 : : SNDRV_PCM_RATE_192000)
134 : : #define SNDRV_PCM_RATE_8000_384000 (SNDRV_PCM_RATE_8000_192000|\
135 : : SNDRV_PCM_RATE_352800|\
136 : : SNDRV_PCM_RATE_384000)
137 : : #define _SNDRV_PCM_FMTBIT(fmt) (1ULL << (__force int)SNDRV_PCM_FORMAT_##fmt)
138 : : #define SNDRV_PCM_FMTBIT_S8 _SNDRV_PCM_FMTBIT(S8)
139 : : #define SNDRV_PCM_FMTBIT_U8 _SNDRV_PCM_FMTBIT(U8)
140 : : #define SNDRV_PCM_FMTBIT_S16_LE _SNDRV_PCM_FMTBIT(S16_LE)
141 : : #define SNDRV_PCM_FMTBIT_S16_BE _SNDRV_PCM_FMTBIT(S16_BE)
142 : : #define SNDRV_PCM_FMTBIT_U16_LE _SNDRV_PCM_FMTBIT(U16_LE)
143 : : #define SNDRV_PCM_FMTBIT_U16_BE _SNDRV_PCM_FMTBIT(U16_BE)
144 : : #define SNDRV_PCM_FMTBIT_S24_LE _SNDRV_PCM_FMTBIT(S24_LE)
145 : : #define SNDRV_PCM_FMTBIT_S24_BE _SNDRV_PCM_FMTBIT(S24_BE)
146 : : #define SNDRV_PCM_FMTBIT_U24_LE _SNDRV_PCM_FMTBIT(U24_LE)
147 : : #define SNDRV_PCM_FMTBIT_U24_BE _SNDRV_PCM_FMTBIT(U24_BE)
148 : : #define SNDRV_PCM_FMTBIT_S32_LE _SNDRV_PCM_FMTBIT(S32_LE)
149 : : #define SNDRV_PCM_FMTBIT_S32_BE _SNDRV_PCM_FMTBIT(S32_BE)
150 : : #define SNDRV_PCM_FMTBIT_U32_LE _SNDRV_PCM_FMTBIT(U32_LE)
151 : : #define SNDRV_PCM_FMTBIT_U32_BE _SNDRV_PCM_FMTBIT(U32_BE)
152 : : #define SNDRV_PCM_FMTBIT_FLOAT_LE _SNDRV_PCM_FMTBIT(FLOAT_LE)
153 : : #define SNDRV_PCM_FMTBIT_FLOAT_BE _SNDRV_PCM_FMTBIT(FLOAT_BE)
154 : : #define SNDRV_PCM_FMTBIT_FLOAT64_LE _SNDRV_PCM_FMTBIT(FLOAT64_LE)
155 : : #define SNDRV_PCM_FMTBIT_FLOAT64_BE _SNDRV_PCM_FMTBIT(FLOAT64_BE)
156 : : #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_LE)
157 : : #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE _SNDRV_PCM_FMTBIT(IEC958_SUBFRAME_BE)
158 : : #define SNDRV_PCM_FMTBIT_MU_LAW _SNDRV_PCM_FMTBIT(MU_LAW)
159 : : #define SNDRV_PCM_FMTBIT_A_LAW _SNDRV_PCM_FMTBIT(A_LAW)
160 : : #define SNDRV_PCM_FMTBIT_IMA_ADPCM _SNDRV_PCM_FMTBIT(IMA_ADPCM)
161 : : #define SNDRV_PCM_FMTBIT_MPEG _SNDRV_PCM_FMTBIT(MPEG)
162 : : #define SNDRV_PCM_FMTBIT_GSM _SNDRV_PCM_FMTBIT(GSM)
163 : : #define SNDRV_PCM_FMTBIT_S20_LE _SNDRV_PCM_FMTBIT(S20_LE)
164 : : #define SNDRV_PCM_FMTBIT_U20_LE _SNDRV_PCM_FMTBIT(U20_LE)
165 : : #define SNDRV_PCM_FMTBIT_S20_BE _SNDRV_PCM_FMTBIT(S20_BE)
166 : : #define SNDRV_PCM_FMTBIT_U20_BE _SNDRV_PCM_FMTBIT(U20_BE)
167 : : #define SNDRV_PCM_FMTBIT_SPECIAL _SNDRV_PCM_FMTBIT(SPECIAL)
168 : : #define SNDRV_PCM_FMTBIT_S24_3LE _SNDRV_PCM_FMTBIT(S24_3LE)
169 : : #define SNDRV_PCM_FMTBIT_U24_3LE _SNDRV_PCM_FMTBIT(U24_3LE)
170 : : #define SNDRV_PCM_FMTBIT_S24_3BE _SNDRV_PCM_FMTBIT(S24_3BE)
171 : : #define SNDRV_PCM_FMTBIT_U24_3BE _SNDRV_PCM_FMTBIT(U24_3BE)
172 : : #define SNDRV_PCM_FMTBIT_S20_3LE _SNDRV_PCM_FMTBIT(S20_3LE)
173 : : #define SNDRV_PCM_FMTBIT_U20_3LE _SNDRV_PCM_FMTBIT(U20_3LE)
174 : : #define SNDRV_PCM_FMTBIT_S20_3BE _SNDRV_PCM_FMTBIT(S20_3BE)
175 : : #define SNDRV_PCM_FMTBIT_U20_3BE _SNDRV_PCM_FMTBIT(U20_3BE)
176 : : #define SNDRV_PCM_FMTBIT_S18_3LE _SNDRV_PCM_FMTBIT(S18_3LE)
177 : : #define SNDRV_PCM_FMTBIT_U18_3LE _SNDRV_PCM_FMTBIT(U18_3LE)
178 : : #define SNDRV_PCM_FMTBIT_S18_3BE _SNDRV_PCM_FMTBIT(S18_3BE)
179 : : #define SNDRV_PCM_FMTBIT_U18_3BE _SNDRV_PCM_FMTBIT(U18_3BE)
180 : : #define SNDRV_PCM_FMTBIT_G723_24 _SNDRV_PCM_FMTBIT(G723_24)
181 : : #define SNDRV_PCM_FMTBIT_G723_24_1B _SNDRV_PCM_FMTBIT(G723_24_1B)
182 : : #define SNDRV_PCM_FMTBIT_G723_40 _SNDRV_PCM_FMTBIT(G723_40)
183 : : #define SNDRV_PCM_FMTBIT_G723_40_1B _SNDRV_PCM_FMTBIT(G723_40_1B)
184 : : #define SNDRV_PCM_FMTBIT_DSD_U8 _SNDRV_PCM_FMTBIT(DSD_U8)
185 : : #define SNDRV_PCM_FMTBIT_DSD_U16_LE _SNDRV_PCM_FMTBIT(DSD_U16_LE)
186 : : #define SNDRV_PCM_FMTBIT_DSD_U32_LE _SNDRV_PCM_FMTBIT(DSD_U32_LE)
187 : : #define SNDRV_PCM_FMTBIT_DSD_U16_BE _SNDRV_PCM_FMTBIT(DSD_U16_BE)
188 : : #define SNDRV_PCM_FMTBIT_DSD_U32_BE _SNDRV_PCM_FMTBIT(DSD_U32_BE)
189 : :
190 : : #ifdef SNDRV_LITTLE_ENDIAN
191 : : #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_LE
192 : : #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_LE
193 : : #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_LE
194 : : #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_LE
195 : : #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_LE
196 : : #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_LE
197 : : #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_LE
198 : : #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_LE
199 : : #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
200 : : #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_LE
201 : : #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_LE
202 : : #endif
203 : : #ifdef SNDRV_BIG_ENDIAN
204 : : #define SNDRV_PCM_FMTBIT_S16 SNDRV_PCM_FMTBIT_S16_BE
205 : : #define SNDRV_PCM_FMTBIT_U16 SNDRV_PCM_FMTBIT_U16_BE
206 : : #define SNDRV_PCM_FMTBIT_S24 SNDRV_PCM_FMTBIT_S24_BE
207 : : #define SNDRV_PCM_FMTBIT_U24 SNDRV_PCM_FMTBIT_U24_BE
208 : : #define SNDRV_PCM_FMTBIT_S32 SNDRV_PCM_FMTBIT_S32_BE
209 : : #define SNDRV_PCM_FMTBIT_U32 SNDRV_PCM_FMTBIT_U32_BE
210 : : #define SNDRV_PCM_FMTBIT_FLOAT SNDRV_PCM_FMTBIT_FLOAT_BE
211 : : #define SNDRV_PCM_FMTBIT_FLOAT64 SNDRV_PCM_FMTBIT_FLOAT64_BE
212 : : #define SNDRV_PCM_FMTBIT_IEC958_SUBFRAME SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE
213 : : #define SNDRV_PCM_FMTBIT_S20 SNDRV_PCM_FMTBIT_S20_BE
214 : : #define SNDRV_PCM_FMTBIT_U20 SNDRV_PCM_FMTBIT_U20_BE
215 : : #endif
216 : :
217 : : struct snd_pcm_file {
218 : : struct snd_pcm_substream *substream;
219 : : int no_compat_mmap;
220 : : unsigned int user_pversion; /* supported protocol version */
221 : : };
222 : :
223 : : struct snd_pcm_hw_rule;
224 : : typedef int (*snd_pcm_hw_rule_func_t)(struct snd_pcm_hw_params *params,
225 : : struct snd_pcm_hw_rule *rule);
226 : :
227 : : struct snd_pcm_hw_rule {
228 : : unsigned int cond;
229 : : int var;
230 : : int deps[4];
231 : :
232 : : snd_pcm_hw_rule_func_t func;
233 : : void *private;
234 : : };
235 : :
236 : : struct snd_pcm_hw_constraints {
237 : : struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
238 : : SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
239 : : struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
240 : : SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
241 : : unsigned int rules_num;
242 : : unsigned int rules_all;
243 : : struct snd_pcm_hw_rule *rules;
244 : : };
245 : :
246 : : static inline struct snd_mask *constrs_mask(struct snd_pcm_hw_constraints *constrs,
247 : : snd_pcm_hw_param_t var)
248 : : {
249 : 0 : return &constrs->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
250 : : }
251 : :
252 : : static inline struct snd_interval *constrs_interval(struct snd_pcm_hw_constraints *constrs,
253 : : snd_pcm_hw_param_t var)
254 : : {
255 : 0 : return &constrs->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
256 : : }
257 : :
258 : : struct snd_ratnum {
259 : : unsigned int num;
260 : : unsigned int den_min, den_max, den_step;
261 : : };
262 : :
263 : : struct snd_ratden {
264 : : unsigned int num_min, num_max, num_step;
265 : : unsigned int den;
266 : : };
267 : :
268 : : struct snd_pcm_hw_constraint_ratnums {
269 : : int nrats;
270 : : const struct snd_ratnum *rats;
271 : : };
272 : :
273 : : struct snd_pcm_hw_constraint_ratdens {
274 : : int nrats;
275 : : const struct snd_ratden *rats;
276 : : };
277 : :
278 : : struct snd_pcm_hw_constraint_list {
279 : : const unsigned int *list;
280 : : unsigned int count;
281 : : unsigned int mask;
282 : : };
283 : :
284 : : struct snd_pcm_hw_constraint_ranges {
285 : : unsigned int count;
286 : : const struct snd_interval *ranges;
287 : : unsigned int mask;
288 : : };
289 : :
290 : : /*
291 : : * userspace-provided audio timestamp config to kernel,
292 : : * structure is for internal use only and filled with dedicated unpack routine
293 : : */
294 : : struct snd_pcm_audio_tstamp_config {
295 : : /* 5 of max 16 bits used */
296 : : u32 type_requested:4;
297 : : u32 report_delay:1; /* add total delay to A/D or D/A */
298 : : };
299 : :
300 : : static inline void snd_pcm_unpack_audio_tstamp_config(__u32 data,
301 : : struct snd_pcm_audio_tstamp_config *config)
302 : : {
303 : 0 : config->type_requested = data & 0xF;
304 : 0 : config->report_delay = (data >> 4) & 1;
305 : : }
306 : :
307 : : /*
308 : : * kernel-provided audio timestamp report to user-space
309 : : * structure is for internal use only and read by dedicated pack routine
310 : : */
311 : : struct snd_pcm_audio_tstamp_report {
312 : : /* 6 of max 16 bits used for bit-fields */
313 : :
314 : : /* for backwards compatibility */
315 : : u32 valid:1;
316 : :
317 : : /* actual type if hardware could not support requested timestamp */
318 : : u32 actual_type:4;
319 : :
320 : : /* accuracy represented in ns units */
321 : : u32 accuracy_report:1; /* 0 if accuracy unknown, 1 if accuracy field is valid */
322 : : u32 accuracy; /* up to 4.29s, will be packed in separate field */
323 : : };
324 : :
325 : : static inline void snd_pcm_pack_audio_tstamp_report(__u32 *data, __u32 *accuracy,
326 : : const struct snd_pcm_audio_tstamp_report *report)
327 : : {
328 : : u32 tmp;
329 : :
330 : 0 : tmp = report->accuracy_report;
331 : 0 : tmp <<= 4;
332 : 0 : tmp |= report->actual_type;
333 : 0 : tmp <<= 1;
334 : 0 : tmp |= report->valid;
335 : :
336 : 0 : *data &= 0xffff; /* zero-clear MSBs */
337 : 0 : *data |= (tmp << 16);
338 : 0 : *accuracy = report->accuracy;
339 : : }
340 : :
341 : :
342 : : struct snd_pcm_runtime {
343 : : /* -- Status -- */
344 : : struct snd_pcm_substream *trigger_master;
345 : : struct timespec trigger_tstamp; /* trigger timestamp */
346 : : bool trigger_tstamp_latched; /* trigger timestamp latched in low-level driver/hardware */
347 : : int overrange;
348 : : snd_pcm_uframes_t avail_max;
349 : : snd_pcm_uframes_t hw_ptr_base; /* Position at buffer restart */
350 : : snd_pcm_uframes_t hw_ptr_interrupt; /* Position at interrupt time */
351 : : unsigned long hw_ptr_jiffies; /* Time when hw_ptr is updated */
352 : : unsigned long hw_ptr_buffer_jiffies; /* buffer time in jiffies */
353 : : snd_pcm_sframes_t delay; /* extra delay; typically FIFO size */
354 : : u64 hw_ptr_wrap; /* offset for hw_ptr due to boundary wrap-around */
355 : :
356 : : /* -- HW params -- */
357 : : snd_pcm_access_t access; /* access mode */
358 : : snd_pcm_format_t format; /* SNDRV_PCM_FORMAT_* */
359 : : snd_pcm_subformat_t subformat; /* subformat */
360 : : unsigned int rate; /* rate in Hz */
361 : : unsigned int channels; /* channels */
362 : : snd_pcm_uframes_t period_size; /* period size */
363 : : unsigned int periods; /* periods */
364 : : snd_pcm_uframes_t buffer_size; /* buffer size */
365 : : snd_pcm_uframes_t min_align; /* Min alignment for the format */
366 : : size_t byte_align;
367 : : unsigned int frame_bits;
368 : : unsigned int sample_bits;
369 : : unsigned int info;
370 : : unsigned int rate_num;
371 : : unsigned int rate_den;
372 : : unsigned int no_period_wakeup: 1;
373 : :
374 : : /* -- SW params -- */
375 : : int tstamp_mode; /* mmap timestamp is updated */
376 : : unsigned int period_step;
377 : : snd_pcm_uframes_t start_threshold;
378 : : snd_pcm_uframes_t stop_threshold;
379 : : snd_pcm_uframes_t silence_threshold; /* Silence filling happens when
380 : : noise is nearest than this */
381 : : snd_pcm_uframes_t silence_size; /* Silence filling size */
382 : : snd_pcm_uframes_t boundary; /* pointers wrap point */
383 : :
384 : : snd_pcm_uframes_t silence_start; /* starting pointer to silence area */
385 : : snd_pcm_uframes_t silence_filled; /* size filled with silence */
386 : :
387 : : union snd_pcm_sync_id sync; /* hardware synchronization ID */
388 : :
389 : : /* -- mmap -- */
390 : : struct snd_pcm_mmap_status *status;
391 : : struct snd_pcm_mmap_control *control;
392 : :
393 : : /* -- locking / scheduling -- */
394 : : snd_pcm_uframes_t twake; /* do transfer (!poll) wakeup if non-zero */
395 : : wait_queue_head_t sleep; /* poll sleep */
396 : : wait_queue_head_t tsleep; /* transfer sleep */
397 : : struct fasync_struct *fasync;
398 : :
399 : : /* -- private section -- */
400 : : void *private_data;
401 : : void (*private_free)(struct snd_pcm_runtime *runtime);
402 : :
403 : : /* -- hardware description -- */
404 : : struct snd_pcm_hardware hw;
405 : : struct snd_pcm_hw_constraints hw_constraints;
406 : :
407 : : /* -- timer -- */
408 : : unsigned int timer_resolution; /* timer resolution */
409 : : int tstamp_type; /* timestamp type */
410 : :
411 : : /* -- DMA -- */
412 : : unsigned char *dma_area; /* DMA area */
413 : : dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
414 : : size_t dma_bytes; /* size of DMA area */
415 : :
416 : : struct snd_dma_buffer *dma_buffer_p; /* allocated buffer */
417 : :
418 : : /* -- audio timestamp config -- */
419 : : struct snd_pcm_audio_tstamp_config audio_tstamp_config;
420 : : struct snd_pcm_audio_tstamp_report audio_tstamp_report;
421 : : struct timespec driver_tstamp;
422 : :
423 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
424 : : /* -- OSS things -- */
425 : : struct snd_pcm_oss_runtime oss;
426 : : #endif
427 : : };
428 : :
429 : : struct snd_pcm_group { /* keep linked substreams */
430 : : spinlock_t lock;
431 : : struct mutex mutex;
432 : : struct list_head substreams;
433 : : refcount_t refs;
434 : : };
435 : :
436 : : struct pid;
437 : :
438 : : struct snd_pcm_substream {
439 : : struct snd_pcm *pcm;
440 : : struct snd_pcm_str *pstr;
441 : : void *private_data; /* copied from pcm->private_data */
442 : : int number;
443 : : char name[32]; /* substream name */
444 : : int stream; /* stream (direction) */
445 : : struct pm_qos_request latency_pm_qos_req; /* pm_qos request */
446 : : size_t buffer_bytes_max; /* limit ring buffer size */
447 : : struct snd_dma_buffer dma_buffer;
448 : : size_t dma_max;
449 : : /* -- hardware operations -- */
450 : : const struct snd_pcm_ops *ops;
451 : : /* -- runtime information -- */
452 : : struct snd_pcm_runtime *runtime;
453 : : /* -- timer section -- */
454 : : struct snd_timer *timer; /* timer */
455 : : unsigned timer_running: 1; /* time is running */
456 : : long wait_time; /* time in ms for R/W to wait for avail */
457 : : /* -- next substream -- */
458 : : struct snd_pcm_substream *next;
459 : : /* -- linked substreams -- */
460 : : struct list_head link_list; /* linked list member */
461 : : struct snd_pcm_group self_group; /* fake group for non linked substream (with substream lock inside) */
462 : : struct snd_pcm_group *group; /* pointer to current group */
463 : : /* -- assigned files -- */
464 : : int ref_count;
465 : : atomic_t mmap_count;
466 : : unsigned int f_flags;
467 : : void (*pcm_release)(struct snd_pcm_substream *);
468 : : struct pid *pid;
469 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
470 : : /* -- OSS things -- */
471 : : struct snd_pcm_oss_substream oss;
472 : : #endif
473 : : #ifdef CONFIG_SND_VERBOSE_PROCFS
474 : : struct snd_info_entry *proc_root;
475 : : #endif /* CONFIG_SND_VERBOSE_PROCFS */
476 : : /* misc flags */
477 : : unsigned int hw_opened: 1;
478 : : };
479 : :
480 : : #define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
481 : :
482 : :
483 : : struct snd_pcm_str {
484 : : int stream; /* stream (direction) */
485 : : struct snd_pcm *pcm;
486 : : /* -- substreams -- */
487 : : unsigned int substream_count;
488 : : unsigned int substream_opened;
489 : : struct snd_pcm_substream *substream;
490 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
491 : : /* -- OSS things -- */
492 : : struct snd_pcm_oss_stream oss;
493 : : #endif
494 : : #ifdef CONFIG_SND_VERBOSE_PROCFS
495 : : struct snd_info_entry *proc_root;
496 : : #ifdef CONFIG_SND_PCM_XRUN_DEBUG
497 : : unsigned int xrun_debug; /* 0 = disabled, 1 = verbose, 2 = stacktrace */
498 : : #endif
499 : : #endif
500 : : struct snd_kcontrol *chmap_kctl; /* channel-mapping controls */
501 : : struct device dev;
502 : : };
503 : :
504 : : struct snd_pcm {
505 : : struct snd_card *card;
506 : : struct list_head list;
507 : : int device; /* device number */
508 : : unsigned int info_flags;
509 : : unsigned short dev_class;
510 : : unsigned short dev_subclass;
511 : : char id[64];
512 : : char name[80];
513 : : struct snd_pcm_str streams[2];
514 : : struct mutex open_mutex;
515 : : wait_queue_head_t open_wait;
516 : : void *private_data;
517 : : void (*private_free) (struct snd_pcm *pcm);
518 : : bool internal; /* pcm is for internal use only */
519 : : bool nonatomic; /* whole PCM operations are in non-atomic context */
520 : : bool no_device_suspend; /* don't invoke device PM suspend */
521 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
522 : : struct snd_pcm_oss oss;
523 : : #endif
524 : : };
525 : :
526 : : /*
527 : : * Registering
528 : : */
529 : :
530 : : extern const struct file_operations snd_pcm_f_ops[2];
531 : :
532 : : int snd_pcm_new(struct snd_card *card, const char *id, int device,
533 : : int playback_count, int capture_count,
534 : : struct snd_pcm **rpcm);
535 : : int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
536 : : int playback_count, int capture_count,
537 : : struct snd_pcm **rpcm);
538 : : int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
539 : :
540 : : #if IS_ENABLED(CONFIG_SND_PCM_OSS)
541 : : struct snd_pcm_notify {
542 : : int (*n_register) (struct snd_pcm * pcm);
543 : : int (*n_disconnect) (struct snd_pcm * pcm);
544 : : int (*n_unregister) (struct snd_pcm * pcm);
545 : : struct list_head list;
546 : : };
547 : : int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
548 : : #endif
549 : :
550 : : /*
551 : : * Native I/O
552 : : */
553 : :
554 : : int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info);
555 : : int snd_pcm_info_user(struct snd_pcm_substream *substream,
556 : : struct snd_pcm_info __user *info);
557 : : int snd_pcm_status(struct snd_pcm_substream *substream,
558 : : struct snd_pcm_status *status);
559 : : int snd_pcm_start(struct snd_pcm_substream *substream);
560 : : int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t status);
561 : : int snd_pcm_drain_done(struct snd_pcm_substream *substream);
562 : : int snd_pcm_stop_xrun(struct snd_pcm_substream *substream);
563 : : #ifdef CONFIG_PM
564 : : int snd_pcm_suspend_all(struct snd_pcm *pcm);
565 : : #else
566 : : static inline int snd_pcm_suspend_all(struct snd_pcm *pcm)
567 : : {
568 : : return 0;
569 : : }
570 : : #endif
571 : : int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg);
572 : : int snd_pcm_open_substream(struct snd_pcm *pcm, int stream, struct file *file,
573 : : struct snd_pcm_substream **rsubstream);
574 : : void snd_pcm_release_substream(struct snd_pcm_substream *substream);
575 : : int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct file *file,
576 : : struct snd_pcm_substream **rsubstream);
577 : : void snd_pcm_detach_substream(struct snd_pcm_substream *substream);
578 : : int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file, struct vm_area_struct *area);
579 : :
580 : :
581 : : #ifdef CONFIG_SND_DEBUG
582 : : void snd_pcm_debug_name(struct snd_pcm_substream *substream,
583 : : char *name, size_t len);
584 : : #else
585 : : static inline void
586 : : snd_pcm_debug_name(struct snd_pcm_substream *substream, char *buf, size_t size)
587 : : {
588 : 0 : *buf = 0;
589 : : }
590 : : #endif
591 : :
592 : : /*
593 : : * PCM library
594 : : */
595 : :
596 : : /**
597 : : * snd_pcm_stream_linked - Check whether the substream is linked with others
598 : : * @substream: substream to check
599 : : *
600 : : * Returns true if the given substream is being linked with others.
601 : : */
602 : : static inline int snd_pcm_stream_linked(struct snd_pcm_substream *substream)
603 : : {
604 : 0 : return substream->group != &substream->self_group;
605 : : }
606 : :
607 : : void snd_pcm_stream_lock(struct snd_pcm_substream *substream);
608 : : void snd_pcm_stream_unlock(struct snd_pcm_substream *substream);
609 : : void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream);
610 : : void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream);
611 : : unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream);
612 : :
613 : : /**
614 : : * snd_pcm_stream_lock_irqsave - Lock the PCM stream
615 : : * @substream: PCM substream
616 : : * @flags: irq flags
617 : : *
618 : : * This locks the PCM stream like snd_pcm_stream_lock() but with the local
619 : : * IRQ (only when nonatomic is false). In nonatomic case, this is identical
620 : : * as snd_pcm_stream_lock().
621 : : */
622 : : #define snd_pcm_stream_lock_irqsave(substream, flags) \
623 : : do { \
624 : : typecheck(unsigned long, flags); \
625 : : flags = _snd_pcm_stream_lock_irqsave(substream); \
626 : : } while (0)
627 : : void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
628 : : unsigned long flags);
629 : :
630 : : /**
631 : : * snd_pcm_group_for_each_entry - iterate over the linked substreams
632 : : * @s: the iterator
633 : : * @substream: the substream
634 : : *
635 : : * Iterate over the all linked substreams to the given @substream.
636 : : * When @substream isn't linked with any others, this gives returns @substream
637 : : * itself once.
638 : : */
639 : : #define snd_pcm_group_for_each_entry(s, substream) \
640 : : list_for_each_entry(s, &substream->group->substreams, link_list)
641 : :
642 : : /**
643 : : * snd_pcm_running - Check whether the substream is in a running state
644 : : * @substream: substream to check
645 : : *
646 : : * Returns true if the given substream is in the state RUNNING, or in the
647 : : * state DRAINING for playback.
648 : : */
649 : : static inline int snd_pcm_running(struct snd_pcm_substream *substream)
650 : : {
651 : 0 : return (substream->runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
652 : 0 : (substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING &&
653 : 0 : substream->stream == SNDRV_PCM_STREAM_PLAYBACK));
654 : : }
655 : :
656 : : /**
657 : : * bytes_to_samples - Unit conversion of the size from bytes to samples
658 : : * @runtime: PCM runtime instance
659 : : * @size: size in bytes
660 : : */
661 : : static inline ssize_t bytes_to_samples(struct snd_pcm_runtime *runtime, ssize_t size)
662 : : {
663 : 0 : return size * 8 / runtime->sample_bits;
664 : : }
665 : :
666 : : /**
667 : : * bytes_to_frames - Unit conversion of the size from bytes to frames
668 : : * @runtime: PCM runtime instance
669 : : * @size: size in bytes
670 : : */
671 : : static inline snd_pcm_sframes_t bytes_to_frames(struct snd_pcm_runtime *runtime, ssize_t size)
672 : : {
673 : 0 : return size * 8 / runtime->frame_bits;
674 : : }
675 : :
676 : : /**
677 : : * samples_to_bytes - Unit conversion of the size from samples to bytes
678 : : * @runtime: PCM runtime instance
679 : : * @size: size in samples
680 : : */
681 : : static inline ssize_t samples_to_bytes(struct snd_pcm_runtime *runtime, ssize_t size)
682 : : {
683 : 0 : return size * runtime->sample_bits / 8;
684 : : }
685 : :
686 : : /**
687 : : * frames_to_bytes - Unit conversion of the size from frames to bytes
688 : : * @runtime: PCM runtime instance
689 : : * @size: size in frames
690 : : */
691 : : static inline ssize_t frames_to_bytes(struct snd_pcm_runtime *runtime, snd_pcm_sframes_t size)
692 : : {
693 : 0 : return size * runtime->frame_bits / 8;
694 : : }
695 : :
696 : : /**
697 : : * frame_aligned - Check whether the byte size is aligned to frames
698 : : * @runtime: PCM runtime instance
699 : : * @bytes: size in bytes
700 : : */
701 : : static inline int frame_aligned(struct snd_pcm_runtime *runtime, ssize_t bytes)
702 : : {
703 : 0 : return bytes % runtime->byte_align == 0;
704 : : }
705 : :
706 : : /**
707 : : * snd_pcm_lib_buffer_bytes - Get the buffer size of the current PCM in bytes
708 : : * @substream: PCM substream
709 : : */
710 : : static inline size_t snd_pcm_lib_buffer_bytes(struct snd_pcm_substream *substream)
711 : : {
712 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
713 : 0 : return frames_to_bytes(runtime, runtime->buffer_size);
714 : : }
715 : :
716 : : /**
717 : : * snd_pcm_lib_period_bytes - Get the period size of the current PCM in bytes
718 : : * @substream: PCM substream
719 : : */
720 : : static inline size_t snd_pcm_lib_period_bytes(struct snd_pcm_substream *substream)
721 : : {
722 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
723 : 0 : return frames_to_bytes(runtime, runtime->period_size);
724 : : }
725 : :
726 : : /**
727 : : * snd_pcm_playback_avail - Get the available (writable) space for playback
728 : : * @runtime: PCM runtime instance
729 : : *
730 : : * Result is between 0 ... (boundary - 1)
731 : : */
732 : : static inline snd_pcm_uframes_t snd_pcm_playback_avail(struct snd_pcm_runtime *runtime)
733 : : {
734 : 0 : snd_pcm_sframes_t avail = runtime->status->hw_ptr + runtime->buffer_size - runtime->control->appl_ptr;
735 : 0 : if (avail < 0)
736 : 0 : avail += runtime->boundary;
737 : 0 : else if ((snd_pcm_uframes_t) avail >= runtime->boundary)
738 : 0 : avail -= runtime->boundary;
739 : 0 : return avail;
740 : : }
741 : :
742 : : /**
743 : : * snd_pcm_capture_avail - Get the available (readable) space for capture
744 : : * @runtime: PCM runtime instance
745 : : *
746 : : * Result is between 0 ... (boundary - 1)
747 : : */
748 : : static inline snd_pcm_uframes_t snd_pcm_capture_avail(struct snd_pcm_runtime *runtime)
749 : : {
750 : 0 : snd_pcm_sframes_t avail = runtime->status->hw_ptr - runtime->control->appl_ptr;
751 : 0 : if (avail < 0)
752 : 0 : avail += runtime->boundary;
753 : 0 : return avail;
754 : : }
755 : :
756 : : /**
757 : : * snd_pcm_playback_hw_avail - Get the queued space for playback
758 : : * @runtime: PCM runtime instance
759 : : */
760 : : static inline snd_pcm_sframes_t snd_pcm_playback_hw_avail(struct snd_pcm_runtime *runtime)
761 : : {
762 : 0 : return runtime->buffer_size - snd_pcm_playback_avail(runtime);
763 : : }
764 : :
765 : : /**
766 : : * snd_pcm_capture_hw_avail - Get the free space for capture
767 : : * @runtime: PCM runtime instance
768 : : */
769 : : static inline snd_pcm_sframes_t snd_pcm_capture_hw_avail(struct snd_pcm_runtime *runtime)
770 : : {
771 : 0 : return runtime->buffer_size - snd_pcm_capture_avail(runtime);
772 : : }
773 : :
774 : : /**
775 : : * snd_pcm_playback_ready - check whether the playback buffer is available
776 : : * @substream: the pcm substream instance
777 : : *
778 : : * Checks whether enough free space is available on the playback buffer.
779 : : *
780 : : * Return: Non-zero if available, or zero if not.
781 : : */
782 : : static inline int snd_pcm_playback_ready(struct snd_pcm_substream *substream)
783 : : {
784 : : struct snd_pcm_runtime *runtime = substream->runtime;
785 : : return snd_pcm_playback_avail(runtime) >= runtime->control->avail_min;
786 : : }
787 : :
788 : : /**
789 : : * snd_pcm_capture_ready - check whether the capture buffer is available
790 : : * @substream: the pcm substream instance
791 : : *
792 : : * Checks whether enough capture data is available on the capture buffer.
793 : : *
794 : : * Return: Non-zero if available, or zero if not.
795 : : */
796 : : static inline int snd_pcm_capture_ready(struct snd_pcm_substream *substream)
797 : : {
798 : : struct snd_pcm_runtime *runtime = substream->runtime;
799 : : return snd_pcm_capture_avail(runtime) >= runtime->control->avail_min;
800 : : }
801 : :
802 : : /**
803 : : * snd_pcm_playback_data - check whether any data exists on the playback buffer
804 : : * @substream: the pcm substream instance
805 : : *
806 : : * Checks whether any data exists on the playback buffer.
807 : : *
808 : : * Return: Non-zero if any data exists, or zero if not. If stop_threshold
809 : : * is bigger or equal to boundary, then this function returns always non-zero.
810 : : */
811 : 0 : static inline int snd_pcm_playback_data(struct snd_pcm_substream *substream)
812 : : {
813 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
814 : :
815 : 0 : if (runtime->stop_threshold >= runtime->boundary)
816 : : return 1;
817 : 0 : return snd_pcm_playback_avail(runtime) < runtime->buffer_size;
818 : : }
819 : :
820 : : /**
821 : : * snd_pcm_playback_empty - check whether the playback buffer is empty
822 : : * @substream: the pcm substream instance
823 : : *
824 : : * Checks whether the playback buffer is empty.
825 : : *
826 : : * Return: Non-zero if empty, or zero if not.
827 : : */
828 : 0 : static inline int snd_pcm_playback_empty(struct snd_pcm_substream *substream)
829 : : {
830 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
831 : 0 : return snd_pcm_playback_avail(runtime) >= runtime->buffer_size;
832 : : }
833 : :
834 : : /**
835 : : * snd_pcm_capture_empty - check whether the capture buffer is empty
836 : : * @substream: the pcm substream instance
837 : : *
838 : : * Checks whether the capture buffer is empty.
839 : : *
840 : : * Return: Non-zero if empty, or zero if not.
841 : : */
842 : : static inline int snd_pcm_capture_empty(struct snd_pcm_substream *substream)
843 : : {
844 : : struct snd_pcm_runtime *runtime = substream->runtime;
845 : : return snd_pcm_capture_avail(runtime) == 0;
846 : : }
847 : :
848 : : /**
849 : : * snd_pcm_trigger_done - Mark the master substream
850 : : * @substream: the pcm substream instance
851 : : * @master: the linked master substream
852 : : *
853 : : * When multiple substreams of the same card are linked and the hardware
854 : : * supports the single-shot operation, the driver calls this in the loop
855 : : * in snd_pcm_group_for_each_entry() for marking the substream as "done".
856 : : * Then most of trigger operations are performed only to the given master
857 : : * substream.
858 : : *
859 : : * The trigger_master mark is cleared at timestamp updates at the end
860 : : * of trigger operations.
861 : : */
862 : : static inline void snd_pcm_trigger_done(struct snd_pcm_substream *substream,
863 : : struct snd_pcm_substream *master)
864 : : {
865 : : substream->runtime->trigger_master = master;
866 : : }
867 : :
868 : : static inline int hw_is_mask(int var)
869 : : {
870 : 0 : return var >= SNDRV_PCM_HW_PARAM_FIRST_MASK &&
871 : : var <= SNDRV_PCM_HW_PARAM_LAST_MASK;
872 : : }
873 : :
874 : : static inline int hw_is_interval(int var)
875 : : {
876 : 0 : return var >= SNDRV_PCM_HW_PARAM_FIRST_INTERVAL &&
877 : : var <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL;
878 : : }
879 : :
880 : : static inline struct snd_mask *hw_param_mask(struct snd_pcm_hw_params *params,
881 : : snd_pcm_hw_param_t var)
882 : : {
883 : 0 : return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
884 : : }
885 : :
886 : : static inline struct snd_interval *hw_param_interval(struct snd_pcm_hw_params *params,
887 : : snd_pcm_hw_param_t var)
888 : : {
889 : 0 : return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
890 : : }
891 : :
892 : : static inline const struct snd_mask *hw_param_mask_c(const struct snd_pcm_hw_params *params,
893 : : snd_pcm_hw_param_t var)
894 : : {
895 : : return ¶ms->masks[var - SNDRV_PCM_HW_PARAM_FIRST_MASK];
896 : : }
897 : :
898 : : static inline const struct snd_interval *hw_param_interval_c(const struct snd_pcm_hw_params *params,
899 : : snd_pcm_hw_param_t var)
900 : : {
901 : 0 : return ¶ms->intervals[var - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL];
902 : : }
903 : :
904 : : /**
905 : : * params_channels - Get the number of channels from the hw params
906 : : * @p: hw params
907 : : */
908 : : static inline unsigned int params_channels(const struct snd_pcm_hw_params *p)
909 : : {
910 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_CHANNELS)->min;
911 : : }
912 : :
913 : : /**
914 : : * params_rate - Get the sample rate from the hw params
915 : : * @p: hw params
916 : : */
917 : : static inline unsigned int params_rate(const struct snd_pcm_hw_params *p)
918 : : {
919 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_RATE)->min;
920 : : }
921 : :
922 : : /**
923 : : * params_period_size - Get the period size (in frames) from the hw params
924 : : * @p: hw params
925 : : */
926 : : static inline unsigned int params_period_size(const struct snd_pcm_hw_params *p)
927 : : {
928 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIOD_SIZE)->min;
929 : : }
930 : :
931 : : /**
932 : : * params_periods - Get the number of periods from the hw params
933 : : * @p: hw params
934 : : */
935 : : static inline unsigned int params_periods(const struct snd_pcm_hw_params *p)
936 : : {
937 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_PERIODS)->min;
938 : : }
939 : :
940 : : /**
941 : : * params_buffer_size - Get the buffer size (in frames) from the hw params
942 : : * @p: hw params
943 : : */
944 : : static inline unsigned int params_buffer_size(const struct snd_pcm_hw_params *p)
945 : : {
946 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_SIZE)->min;
947 : : }
948 : :
949 : : /**
950 : : * params_buffer_bytes - Get the buffer size (in bytes) from the hw params
951 : : * @p: hw params
952 : : */
953 : : static inline unsigned int params_buffer_bytes(const struct snd_pcm_hw_params *p)
954 : : {
955 : 0 : return hw_param_interval_c(p, SNDRV_PCM_HW_PARAM_BUFFER_BYTES)->min;
956 : : }
957 : :
958 : : int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v);
959 : : int snd_interval_list(struct snd_interval *i, unsigned int count,
960 : : const unsigned int *list, unsigned int mask);
961 : : int snd_interval_ranges(struct snd_interval *i, unsigned int count,
962 : : const struct snd_interval *list, unsigned int mask);
963 : : int snd_interval_ratnum(struct snd_interval *i,
964 : : unsigned int rats_count, const struct snd_ratnum *rats,
965 : : unsigned int *nump, unsigned int *denp);
966 : :
967 : : void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params);
968 : : void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, snd_pcm_hw_param_t var);
969 : :
970 : : int snd_pcm_hw_refine(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params);
971 : :
972 : : int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
973 : : u_int64_t mask);
974 : : int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
975 : : unsigned int min, unsigned int max);
976 : : int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var);
977 : : int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
978 : : unsigned int cond,
979 : : snd_pcm_hw_param_t var,
980 : : const struct snd_pcm_hw_constraint_list *l);
981 : : int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime,
982 : : unsigned int cond,
983 : : snd_pcm_hw_param_t var,
984 : : const struct snd_pcm_hw_constraint_ranges *r);
985 : : int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
986 : : unsigned int cond,
987 : : snd_pcm_hw_param_t var,
988 : : const struct snd_pcm_hw_constraint_ratnums *r);
989 : : int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
990 : : unsigned int cond,
991 : : snd_pcm_hw_param_t var,
992 : : const struct snd_pcm_hw_constraint_ratdens *r);
993 : : int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
994 : : unsigned int cond,
995 : : unsigned int width,
996 : : unsigned int msbits);
997 : : int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
998 : : unsigned int cond,
999 : : snd_pcm_hw_param_t var,
1000 : : unsigned long step);
1001 : : int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
1002 : : unsigned int cond,
1003 : : snd_pcm_hw_param_t var);
1004 : : int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime,
1005 : : unsigned int base_rate);
1006 : : int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime,
1007 : : unsigned int cond,
1008 : : int var,
1009 : : snd_pcm_hw_rule_func_t func, void *private,
1010 : : int dep, ...);
1011 : :
1012 : : /**
1013 : : * snd_pcm_hw_constraint_single() - Constrain parameter to a single value
1014 : : * @runtime: PCM runtime instance
1015 : : * @var: The hw_params variable to constrain
1016 : : * @val: The value to constrain to
1017 : : *
1018 : : * Return: Positive if the value is changed, zero if it's not changed, or a
1019 : : * negative error code.
1020 : : */
1021 : : static inline int snd_pcm_hw_constraint_single(
1022 : : struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var,
1023 : : unsigned int val)
1024 : : {
1025 : : return snd_pcm_hw_constraint_minmax(runtime, var, val, val);
1026 : : }
1027 : :
1028 : : int snd_pcm_format_signed(snd_pcm_format_t format);
1029 : : int snd_pcm_format_unsigned(snd_pcm_format_t format);
1030 : : int snd_pcm_format_linear(snd_pcm_format_t format);
1031 : : int snd_pcm_format_little_endian(snd_pcm_format_t format);
1032 : : int snd_pcm_format_big_endian(snd_pcm_format_t format);
1033 : : #if 0 /* just for kernel-doc */
1034 : : /**
1035 : : * snd_pcm_format_cpu_endian - Check the PCM format is CPU-endian
1036 : : * @format: the format to check
1037 : : *
1038 : : * Return: 1 if the given PCM format is CPU-endian, 0 if
1039 : : * opposite, or a negative error code if endian not specified.
1040 : : */
1041 : : int snd_pcm_format_cpu_endian(snd_pcm_format_t format);
1042 : : #endif /* DocBook */
1043 : : #ifdef SNDRV_LITTLE_ENDIAN
1044 : : #define snd_pcm_format_cpu_endian(format) snd_pcm_format_little_endian(format)
1045 : : #else
1046 : : #define snd_pcm_format_cpu_endian(format) snd_pcm_format_big_endian(format)
1047 : : #endif
1048 : : int snd_pcm_format_width(snd_pcm_format_t format); /* in bits */
1049 : : int snd_pcm_format_physical_width(snd_pcm_format_t format); /* in bits */
1050 : : ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);
1051 : : const unsigned char *snd_pcm_format_silence_64(snd_pcm_format_t format);
1052 : : int snd_pcm_format_set_silence(snd_pcm_format_t format, void *buf, unsigned int frames);
1053 : :
1054 : : void snd_pcm_set_ops(struct snd_pcm * pcm, int direction,
1055 : : const struct snd_pcm_ops *ops);
1056 : : void snd_pcm_set_sync(struct snd_pcm_substream *substream);
1057 : : int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
1058 : : unsigned int cmd, void *arg);
1059 : : void snd_pcm_period_elapsed(struct snd_pcm_substream *substream);
1060 : : snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream,
1061 : : void *buf, bool interleaved,
1062 : : snd_pcm_uframes_t frames, bool in_kernel);
1063 : :
1064 : : static inline snd_pcm_sframes_t
1065 : : snd_pcm_lib_write(struct snd_pcm_substream *substream,
1066 : : const void __user *buf, snd_pcm_uframes_t frames)
1067 : : {
1068 : 0 : return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
1069 : : }
1070 : :
1071 : : static inline snd_pcm_sframes_t
1072 : : snd_pcm_lib_read(struct snd_pcm_substream *substream,
1073 : : void __user *buf, snd_pcm_uframes_t frames)
1074 : : {
1075 : 0 : return __snd_pcm_lib_xfer(substream, (void __force *)buf, true, frames, false);
1076 : : }
1077 : :
1078 : : static inline snd_pcm_sframes_t
1079 : : snd_pcm_lib_writev(struct snd_pcm_substream *substream,
1080 : : void __user **bufs, snd_pcm_uframes_t frames)
1081 : : {
1082 : 0 : return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1083 : : }
1084 : :
1085 : : static inline snd_pcm_sframes_t
1086 : : snd_pcm_lib_readv(struct snd_pcm_substream *substream,
1087 : : void __user **bufs, snd_pcm_uframes_t frames)
1088 : : {
1089 : 0 : return __snd_pcm_lib_xfer(substream, (void *)bufs, false, frames, false);
1090 : : }
1091 : :
1092 : : static inline snd_pcm_sframes_t
1093 : : snd_pcm_kernel_write(struct snd_pcm_substream *substream,
1094 : : const void *buf, snd_pcm_uframes_t frames)
1095 : : {
1096 : : return __snd_pcm_lib_xfer(substream, (void *)buf, true, frames, true);
1097 : : }
1098 : :
1099 : : static inline snd_pcm_sframes_t
1100 : : snd_pcm_kernel_read(struct snd_pcm_substream *substream,
1101 : : void *buf, snd_pcm_uframes_t frames)
1102 : : {
1103 : : return __snd_pcm_lib_xfer(substream, buf, true, frames, true);
1104 : : }
1105 : :
1106 : : static inline snd_pcm_sframes_t
1107 : : snd_pcm_kernel_writev(struct snd_pcm_substream *substream,
1108 : : void **bufs, snd_pcm_uframes_t frames)
1109 : : {
1110 : : return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1111 : : }
1112 : :
1113 : : static inline snd_pcm_sframes_t
1114 : : snd_pcm_kernel_readv(struct snd_pcm_substream *substream,
1115 : : void **bufs, snd_pcm_uframes_t frames)
1116 : : {
1117 : : return __snd_pcm_lib_xfer(substream, bufs, false, frames, true);
1118 : : }
1119 : :
1120 : : int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime);
1121 : : unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate);
1122 : : unsigned int snd_pcm_rate_bit_to_rate(unsigned int rate_bit);
1123 : : unsigned int snd_pcm_rate_mask_intersect(unsigned int rates_a,
1124 : : unsigned int rates_b);
1125 : : unsigned int snd_pcm_rate_range_to_bits(unsigned int rate_min,
1126 : : unsigned int rate_max);
1127 : :
1128 : : /**
1129 : : * snd_pcm_set_runtime_buffer - Set the PCM runtime buffer
1130 : : * @substream: PCM substream to set
1131 : : * @bufp: the buffer information, NULL to clear
1132 : : *
1133 : : * Copy the buffer information to runtime->dma_buffer when @bufp is non-NULL.
1134 : : * Otherwise it clears the current buffer information.
1135 : : */
1136 : : static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream,
1137 : : struct snd_dma_buffer *bufp)
1138 : : {
1139 : 0 : struct snd_pcm_runtime *runtime = substream->runtime;
1140 : 0 : if (bufp) {
1141 : 0 : runtime->dma_buffer_p = bufp;
1142 : 0 : runtime->dma_area = bufp->area;
1143 : 0 : runtime->dma_addr = bufp->addr;
1144 : 0 : runtime->dma_bytes = bufp->bytes;
1145 : : } else {
1146 : 0 : runtime->dma_buffer_p = NULL;
1147 : 0 : runtime->dma_area = NULL;
1148 : 0 : runtime->dma_addr = 0;
1149 : 0 : runtime->dma_bytes = 0;
1150 : : }
1151 : : }
1152 : :
1153 : : /**
1154 : : * snd_pcm_gettime - Fill the timespec depending on the timestamp mode
1155 : : * @runtime: PCM runtime instance
1156 : : * @tv: timespec to fill
1157 : : */
1158 : 0 : static inline void snd_pcm_gettime(struct snd_pcm_runtime *runtime,
1159 : : struct timespec *tv)
1160 : : {
1161 : 0 : switch (runtime->tstamp_type) {
1162 : : case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC:
1163 : : ktime_get_ts(tv);
1164 : : break;
1165 : : case SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW:
1166 : : getrawmonotonic(tv);
1167 : : break;
1168 : : default:
1169 : : getnstimeofday(tv);
1170 : : break;
1171 : : }
1172 : 0 : }
1173 : :
1174 : : /*
1175 : : * Memory
1176 : : */
1177 : :
1178 : : void snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream);
1179 : : void snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm);
1180 : : void snd_pcm_lib_preallocate_pages(struct snd_pcm_substream *substream,
1181 : : int type, struct device *data,
1182 : : size_t size, size_t max);
1183 : : void snd_pcm_lib_preallocate_pages_for_all(struct snd_pcm *pcm,
1184 : : int type, void *data,
1185 : : size_t size, size_t max);
1186 : : int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size);
1187 : : int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream);
1188 : :
1189 : : int _snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream *substream,
1190 : : size_t size, gfp_t gfp_flags);
1191 : : int snd_pcm_lib_free_vmalloc_buffer(struct snd_pcm_substream *substream);
1192 : : struct page *snd_pcm_lib_get_vmalloc_page(struct snd_pcm_substream *substream,
1193 : : unsigned long offset);
1194 : : /**
1195 : : * snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
1196 : : * @substream: the substream to allocate the buffer to
1197 : : * @size: the requested buffer size, in bytes
1198 : : *
1199 : : * Allocates the PCM substream buffer using vmalloc(), i.e., the memory is
1200 : : * contiguous in kernel virtual space, but not in physical memory. Use this
1201 : : * if the buffer is accessed by kernel code but not by device DMA.
1202 : : *
1203 : : * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
1204 : : * code.
1205 : : */
1206 : : static inline int snd_pcm_lib_alloc_vmalloc_buffer
1207 : : (struct snd_pcm_substream *substream, size_t size)
1208 : : {
1209 : : return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1210 : : GFP_KERNEL | __GFP_HIGHMEM | __GFP_ZERO);
1211 : : }
1212 : :
1213 : : /**
1214 : : * snd_pcm_lib_alloc_vmalloc_32_buffer - allocate 32-bit-addressable buffer
1215 : : * @substream: the substream to allocate the buffer to
1216 : : * @size: the requested buffer size, in bytes
1217 : : *
1218 : : * This function works like snd_pcm_lib_alloc_vmalloc_buffer(), but uses
1219 : : * vmalloc_32(), i.e., the pages are allocated from 32-bit-addressable memory.
1220 : : *
1221 : : * Return: 1 if the buffer was changed, 0 if not changed, or a negative error
1222 : : * code.
1223 : : */
1224 : : static inline int snd_pcm_lib_alloc_vmalloc_32_buffer
1225 : : (struct snd_pcm_substream *substream, size_t size)
1226 : : {
1227 : : return _snd_pcm_lib_alloc_vmalloc_buffer(substream, size,
1228 : : GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
1229 : : }
1230 : :
1231 : : #define snd_pcm_get_dma_buf(substream) ((substream)->runtime->dma_buffer_p)
1232 : :
1233 : : #ifdef CONFIG_SND_DMA_SGBUF
1234 : : /*
1235 : : * SG-buffer handling
1236 : : */
1237 : : #define snd_pcm_substream_sgbuf(substream) \
1238 : : snd_pcm_get_dma_buf(substream)->private_data
1239 : :
1240 : : struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
1241 : : unsigned long offset);
1242 : : #else /* !SND_DMA_SGBUF */
1243 : : /*
1244 : : * fake using a continuous buffer
1245 : : */
1246 : : #define snd_pcm_sgbuf_ops_page NULL
1247 : : #endif /* SND_DMA_SGBUF */
1248 : :
1249 : : /**
1250 : : * snd_pcm_sgbuf_get_addr - Get the DMA address at the corresponding offset
1251 : : * @substream: PCM substream
1252 : : * @ofs: byte offset
1253 : : */
1254 : : static inline dma_addr_t
1255 : : snd_pcm_sgbuf_get_addr(struct snd_pcm_substream *substream, unsigned int ofs)
1256 : : {
1257 : : return snd_sgbuf_get_addr(snd_pcm_get_dma_buf(substream), ofs);
1258 : : }
1259 : :
1260 : : /**
1261 : : * snd_pcm_sgbuf_get_ptr - Get the virtual address at the corresponding offset
1262 : : * @substream: PCM substream
1263 : : * @ofs: byte offset
1264 : : */
1265 : : static inline void *
1266 : : snd_pcm_sgbuf_get_ptr(struct snd_pcm_substream *substream, unsigned int ofs)
1267 : : {
1268 : : return snd_sgbuf_get_ptr(snd_pcm_get_dma_buf(substream), ofs);
1269 : : }
1270 : :
1271 : : /**
1272 : : * snd_pcm_sgbuf_chunk_size - Compute the max size that fits within the contig.
1273 : : * page from the given size
1274 : : * @substream: PCM substream
1275 : : * @ofs: byte offset
1276 : : * @size: byte size to examine
1277 : : */
1278 : : static inline unsigned int
1279 : : snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
1280 : : unsigned int ofs, unsigned int size)
1281 : : {
1282 : : return snd_sgbuf_get_chunk_size(snd_pcm_get_dma_buf(substream), ofs, size);
1283 : : }
1284 : :
1285 : : /**
1286 : : * snd_pcm_mmap_data_open - increase the mmap counter
1287 : : * @area: VMA
1288 : : *
1289 : : * PCM mmap callback should handle this counter properly
1290 : : */
1291 : 0 : static inline void snd_pcm_mmap_data_open(struct vm_area_struct *area)
1292 : : {
1293 : 0 : struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1294 : 0 : atomic_inc(&substream->mmap_count);
1295 : 0 : }
1296 : :
1297 : : /**
1298 : : * snd_pcm_mmap_data_close - decrease the mmap counter
1299 : : * @area: VMA
1300 : : *
1301 : : * PCM mmap callback should handle this counter properly
1302 : : */
1303 : 0 : static inline void snd_pcm_mmap_data_close(struct vm_area_struct *area)
1304 : : {
1305 : 0 : struct snd_pcm_substream *substream = (struct snd_pcm_substream *)area->vm_private_data;
1306 : 0 : atomic_dec(&substream->mmap_count);
1307 : 0 : }
1308 : :
1309 : : int snd_pcm_lib_default_mmap(struct snd_pcm_substream *substream,
1310 : : struct vm_area_struct *area);
1311 : : /* mmap for io-memory area */
1312 : : #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
1313 : : #define SNDRV_PCM_INFO_MMAP_IOMEM SNDRV_PCM_INFO_MMAP
1314 : : int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream, struct vm_area_struct *area);
1315 : : #else
1316 : : #define SNDRV_PCM_INFO_MMAP_IOMEM 0
1317 : : #define snd_pcm_lib_mmap_iomem NULL
1318 : : #endif
1319 : :
1320 : : /**
1321 : : * snd_pcm_limit_isa_dma_size - Get the max size fitting with ISA DMA transfer
1322 : : * @dma: DMA number
1323 : : * @max: pointer to store the max size
1324 : : */
1325 : : static inline void snd_pcm_limit_isa_dma_size(int dma, size_t *max)
1326 : : {
1327 : : *max = dma < 4 ? 64 * 1024 : 128 * 1024;
1328 : : }
1329 : :
1330 : : /*
1331 : : * Misc
1332 : : */
1333 : :
1334 : : #define SNDRV_PCM_DEFAULT_CON_SPDIF (IEC958_AES0_CON_EMPHASIS_NONE|\
1335 : : (IEC958_AES1_CON_ORIGINAL<<8)|\
1336 : : (IEC958_AES1_CON_PCM_CODER<<8)|\
1337 : : (IEC958_AES3_CON_FS_48000<<24))
1338 : :
1339 : : #define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
1340 : :
1341 : : const char *snd_pcm_format_name(snd_pcm_format_t format);
1342 : :
1343 : : /**
1344 : : * snd_pcm_stream_str - Get a string naming the direction of a stream
1345 : : * @substream: the pcm substream instance
1346 : : *
1347 : : * Return: A string naming the direction of the stream.
1348 : : */
1349 : : static inline const char *snd_pcm_stream_str(struct snd_pcm_substream *substream)
1350 : : {
1351 : : if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1352 : : return "Playback";
1353 : : else
1354 : : return "Capture";
1355 : : }
1356 : :
1357 : : /*
1358 : : * PCM channel-mapping control API
1359 : : */
1360 : : /* array element of channel maps */
1361 : : struct snd_pcm_chmap_elem {
1362 : : unsigned char channels;
1363 : : unsigned char map[15];
1364 : : };
1365 : :
1366 : : /* channel map information; retrieved via snd_kcontrol_chip() */
1367 : : struct snd_pcm_chmap {
1368 : : struct snd_pcm *pcm; /* assigned PCM instance */
1369 : : int stream; /* PLAYBACK or CAPTURE */
1370 : : struct snd_kcontrol *kctl;
1371 : : const struct snd_pcm_chmap_elem *chmap;
1372 : : unsigned int max_channels;
1373 : : unsigned int channel_mask; /* optional: active channels bitmask */
1374 : : void *private_data; /* optional: private data pointer */
1375 : : };
1376 : :
1377 : : /**
1378 : : * snd_pcm_chmap_substream - get the PCM substream assigned to the given chmap info
1379 : : * @info: chmap information
1380 : : * @idx: the substream number index
1381 : : */
1382 : : static inline struct snd_pcm_substream *
1383 : : snd_pcm_chmap_substream(struct snd_pcm_chmap *info, unsigned int idx)
1384 : : {
1385 : : struct snd_pcm_substream *s;
1386 : 0 : for (s = info->pcm->streams[info->stream].substream; s; s = s->next)
1387 : 0 : if (s->number == idx)
1388 : 0 : return s;
1389 : : return NULL;
1390 : : }
1391 : :
1392 : : /* ALSA-standard channel maps (RL/RR prior to C/LFE) */
1393 : : extern const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[];
1394 : : /* Other world's standard channel maps (C/LFE prior to RL/RR) */
1395 : : extern const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[];
1396 : :
1397 : : /* bit masks to be passed to snd_pcm_chmap.channel_mask field */
1398 : : #define SND_PCM_CHMAP_MASK_24 ((1U << 2) | (1U << 4))
1399 : : #define SND_PCM_CHMAP_MASK_246 (SND_PCM_CHMAP_MASK_24 | (1U << 6))
1400 : : #define SND_PCM_CHMAP_MASK_2468 (SND_PCM_CHMAP_MASK_246 | (1U << 8))
1401 : :
1402 : : int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream,
1403 : : const struct snd_pcm_chmap_elem *chmap,
1404 : : int max_channels,
1405 : : unsigned long private_value,
1406 : : struct snd_pcm_chmap **info_ret);
1407 : :
1408 : : /**
1409 : : * pcm_format_to_bits - Strong-typed conversion of pcm_format to bitwise
1410 : : * @pcm_format: PCM format
1411 : : */
1412 : : static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format)
1413 : : {
1414 : : return 1ULL << (__force int) pcm_format;
1415 : : }
1416 : :
1417 : : /* printk helpers */
1418 : : #define pcm_err(pcm, fmt, args...) \
1419 : : dev_err((pcm)->card->dev, fmt, ##args)
1420 : : #define pcm_warn(pcm, fmt, args...) \
1421 : : dev_warn((pcm)->card->dev, fmt, ##args)
1422 : : #define pcm_dbg(pcm, fmt, args...) \
1423 : : dev_dbg((pcm)->card->dev, fmt, ##args)
1424 : :
1425 : : #endif /* __SOUND_PCM_H */
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