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Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 5 | * Abramo Bagnara <abramo@alsa-project.org> |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 | 8 | #include <linux/slab.h> |
174cd4b1 | 9 | #include <linux/sched/signal.h> |
1da177e4 | 10 | #include <linux/time.h> |
3f7440a6 | 11 | #include <linux/math64.h> |
d81a6d71 | 12 | #include <linux/export.h> |
1da177e4 LT |
13 | #include <sound/core.h> |
14 | #include <sound/control.h> | |
2d3391ec | 15 | #include <sound/tlv.h> |
1da177e4 LT |
16 | #include <sound/info.h> |
17 | #include <sound/pcm.h> | |
18 | #include <sound/pcm_params.h> | |
19 | #include <sound/timer.h> | |
20 | ||
2c4842d3 TS |
21 | #include "pcm_local.h" |
22 | ||
f5914908 TI |
23 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
24 | #define CREATE_TRACE_POINTS | |
25 | #include "pcm_trace.h" | |
26 | #else | |
27 | #define trace_hwptr(substream, pos, in_interrupt) | |
28 | #define trace_xrun(substream) | |
29 | #define trace_hw_ptr_error(substream, reason) | |
fccf5388 | 30 | #define trace_applptr(substream, prev, curr) |
f5914908 TI |
31 | #endif |
32 | ||
a9cd29e7 TI |
33 | static int fill_silence_frames(struct snd_pcm_substream *substream, |
34 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames); | |
35 | ||
1da177e4 LT |
36 | /* |
37 | * fill ring buffer with silence | |
38 | * runtime->silence_start: starting pointer to silence area | |
39 | * runtime->silence_filled: size filled with silence | |
40 | * runtime->silence_threshold: threshold from application | |
41 | * runtime->silence_size: maximal size from application | |
42 | * | |
43 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
44 | */ | |
877211f5 | 45 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 46 | { |
877211f5 | 47 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 48 | snd_pcm_uframes_t frames, ofs, transfer; |
29d1a873 | 49 | int err; |
1da177e4 LT |
50 | |
51 | if (runtime->silence_size < runtime->boundary) { | |
52 | snd_pcm_sframes_t noise_dist, n; | |
aa30db06 TI |
53 | snd_pcm_uframes_t appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
54 | if (runtime->silence_start != appl_ptr) { | |
55 | n = appl_ptr - runtime->silence_start; | |
1da177e4 LT |
56 | if (n < 0) |
57 | n += runtime->boundary; | |
58 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
59 | runtime->silence_filled -= n; | |
60 | else | |
61 | runtime->silence_filled = 0; | |
aa30db06 | 62 | runtime->silence_start = appl_ptr; |
1da177e4 | 63 | } |
235475cb | 64 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 65 | return; |
1da177e4 LT |
66 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
67 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
68 | return; | |
69 | frames = runtime->silence_threshold - noise_dist; | |
70 | if (frames > runtime->silence_size) | |
71 | frames = runtime->silence_size; | |
72 | } else { | |
73 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
74 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
75 | if (avail > runtime->buffer_size) |
76 | avail = runtime->buffer_size; | |
1da177e4 LT |
77 | runtime->silence_filled = avail > 0 ? avail : 0; |
78 | runtime->silence_start = (runtime->status->hw_ptr + | |
79 | runtime->silence_filled) % | |
80 | runtime->boundary; | |
81 | } else { | |
82 | ofs = runtime->status->hw_ptr; | |
83 | frames = new_hw_ptr - ofs; | |
84 | if ((snd_pcm_sframes_t)frames < 0) | |
85 | frames += runtime->boundary; | |
86 | runtime->silence_filled -= frames; | |
87 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
88 | runtime->silence_filled = 0; | |
9a826ddb | 89 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 90 | } else { |
9a826ddb | 91 | runtime->silence_start = ofs; |
1da177e4 | 92 | } |
1da177e4 LT |
93 | } |
94 | frames = runtime->buffer_size - runtime->silence_filled; | |
95 | } | |
7eaa943c TI |
96 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
97 | return; | |
1da177e4 LT |
98 | if (frames == 0) |
99 | return; | |
9a826ddb | 100 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
101 | while (frames > 0) { |
102 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
a9cd29e7 TI |
103 | err = fill_silence_frames(substream, ofs, transfer); |
104 | snd_BUG_ON(err < 0); | |
1da177e4 LT |
105 | runtime->silence_filled += transfer; |
106 | frames -= transfer; | |
107 | ofs = 0; | |
108 | } | |
109 | } | |
110 | ||
acb03d44 EB |
111 | #ifdef CONFIG_SND_DEBUG |
112 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
113 | char *name, size_t len) |
114 | { | |
115 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
116 | substream->pcm->card->number, | |
117 | substream->pcm->device, | |
118 | substream->stream ? 'c' : 'p', | |
119 | substream->number); | |
120 | } | |
acb03d44 EB |
121 | EXPORT_SYMBOL(snd_pcm_debug_name); |
122 | #endif | |
c0070110 | 123 | |
741b20cf JK |
124 | #define XRUN_DEBUG_BASIC (1<<0) |
125 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
126 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 127 | |
ed3da3d9 | 128 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 129 | |
741b20cf JK |
130 | #define xrun_debug(substream, mask) \ |
131 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
132 | #else |
133 | #define xrun_debug(substream, mask) 0 | |
134 | #endif | |
ed3da3d9 | 135 | |
741b20cf JK |
136 | #define dump_stack_on_xrun(substream) do { \ |
137 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
138 | dump_stack(); \ | |
ed3da3d9 TI |
139 | } while (0) |
140 | ||
9cd641ed TI |
141 | /* call with stream lock held */ |
142 | void __snd_pcm_xrun(struct snd_pcm_substream *substream) | |
1da177e4 | 143 | { |
13f040f9 JK |
144 | struct snd_pcm_runtime *runtime = substream->runtime; |
145 | ||
f5914908 | 146 | trace_xrun(substream); |
fcae40c9 BW |
147 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
148 | struct timespec64 tstamp; | |
149 | ||
150 | snd_pcm_gettime(runtime, &tstamp); | |
80fe7430 AB |
151 | runtime->status->tstamp.tv_sec = tstamp.tv_sec; |
152 | runtime->status->tstamp.tv_nsec = tstamp.tv_nsec; | |
fcae40c9 | 153 | } |
1da177e4 | 154 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 155 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 156 | char name[16]; |
acb03d44 | 157 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 158 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 159 | dump_stack_on_xrun(substream); |
1da177e4 | 160 | } |
1da177e4 LT |
161 | } |
162 | ||
0f17014b | 163 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 164 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 165 | do { \ |
f5914908 | 166 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 167 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
168 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
169 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
170 | dump_stack_on_xrun(substream); \ |
171 | } \ | |
172 | } while (0) | |
173 | ||
4d96eb25 JK |
174 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
175 | ||
4d96eb25 | 176 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
177 | |
178 | #endif | |
179 | ||
1250932e JK |
180 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
181 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
182 | { |
183 | snd_pcm_uframes_t avail; | |
184 | ||
763e5067 | 185 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
186 | if (avail > runtime->avail_max) |
187 | runtime->avail_max = avail; | |
4cdc115f TI |
188 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
189 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 190 | snd_pcm_drain_done(substream); |
4cdc115f TI |
191 | return -EPIPE; |
192 | } | |
193 | } else { | |
194 | if (avail >= runtime->stop_threshold) { | |
9cd641ed | 195 | __snd_pcm_xrun(substream); |
4cdc115f TI |
196 | return -EPIPE; |
197 | } | |
1da177e4 | 198 | } |
5daeba34 DD |
199 | if (runtime->twake) { |
200 | if (avail >= runtime->twake) | |
201 | wake_up(&runtime->tsleep); | |
202 | } else if (avail >= runtime->control->avail_min) | |
203 | wake_up(&runtime->sleep); | |
1da177e4 LT |
204 | return 0; |
205 | } | |
206 | ||
3179f620 | 207 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
fcae40c9 BW |
208 | struct timespec64 *curr_tstamp, |
209 | struct timespec64 *audio_tstamp) | |
3179f620 PLB |
210 | { |
211 | struct snd_pcm_runtime *runtime = substream->runtime; | |
212 | u64 audio_frames, audio_nsecs; | |
fcae40c9 | 213 | struct timespec64 driver_tstamp; |
3179f620 PLB |
214 | |
215 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
216 | return; | |
217 | ||
218 | if (!(substream->ops->get_time_info) || | |
219 | (runtime->audio_tstamp_report.actual_type == | |
220 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
221 | ||
222 | /* | |
223 | * provide audio timestamp derived from pointer position | |
224 | * add delay only if requested | |
225 | */ | |
226 | ||
227 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
228 | ||
229 | if (runtime->audio_tstamp_config.report_delay) { | |
230 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
231 | audio_frames -= runtime->delay; | |
232 | else | |
233 | audio_frames += runtime->delay; | |
234 | } | |
235 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
236 | runtime->rate); | |
fcae40c9 | 237 | *audio_tstamp = ns_to_timespec64(audio_nsecs); |
3179f620 | 238 | } |
fcae40c9 BW |
239 | |
240 | if (runtime->status->audio_tstamp.tv_sec != audio_tstamp->tv_sec || | |
241 | runtime->status->audio_tstamp.tv_nsec != audio_tstamp->tv_nsec) { | |
80fe7430 AB |
242 | runtime->status->audio_tstamp.tv_sec = audio_tstamp->tv_sec; |
243 | runtime->status->audio_tstamp.tv_nsec = audio_tstamp->tv_nsec; | |
244 | runtime->status->tstamp.tv_sec = curr_tstamp->tv_sec; | |
245 | runtime->status->tstamp.tv_nsec = curr_tstamp->tv_nsec; | |
20e3f985 | 246 | } |
3179f620 | 247 | |
fcae40c9 | 248 | |
3179f620 PLB |
249 | /* |
250 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
251 | * read by low-level hardware was provided with a delay | |
252 | */ | |
fcae40c9 | 253 | snd_pcm_gettime(substream->runtime, &driver_tstamp); |
3179f620 PLB |
254 | runtime->driver_tstamp = driver_tstamp; |
255 | } | |
256 | ||
f240406b JK |
257 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
258 | unsigned int in_interrupt) | |
1da177e4 | 259 | { |
877211f5 | 260 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 261 | snd_pcm_uframes_t pos; |
f240406b | 262 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
263 | snd_pcm_sframes_t hdelta, delta; |
264 | unsigned long jdelta; | |
3509a03f | 265 | unsigned long curr_jiffies; |
fcae40c9 BW |
266 | struct timespec64 curr_tstamp; |
267 | struct timespec64 audio_tstamp; | |
0e8014d7 | 268 | int crossed_boundary = 0; |
1da177e4 | 269 | |
bbf6ad13 | 270 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
271 | |
272 | /* | |
273 | * group pointer, time and jiffies reads to allow for more | |
274 | * accurate correlations/corrections. | |
275 | * The values are stored at the end of this routine after | |
276 | * corrections for hw_ptr position | |
277 | */ | |
f240406b | 278 | pos = substream->ops->pointer(substream); |
3509a03f | 279 | curr_jiffies = jiffies; |
4eeaaeae | 280 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
281 | if ((substream->ops->get_time_info) && |
282 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
283 | substream->ops->get_time_info(substream, &curr_tstamp, | |
284 | &audio_tstamp, | |
285 | &runtime->audio_tstamp_config, | |
286 | &runtime->audio_tstamp_report); | |
287 | ||
288 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
289 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
fcae40c9 | 290 | snd_pcm_gettime(runtime, &curr_tstamp); |
3179f620 | 291 | } else |
fcae40c9 | 292 | snd_pcm_gettime(runtime, &curr_tstamp); |
4eeaaeae PLB |
293 | } |
294 | ||
1da177e4 | 295 | if (pos == SNDRV_PCM_POS_XRUN) { |
9cd641ed | 296 | __snd_pcm_xrun(substream); |
1da177e4 LT |
297 | return -EPIPE; |
298 | } | |
f240406b | 299 | if (pos >= runtime->buffer_size) { |
09e56df8 | 300 | if (printk_ratelimit()) { |
f240406b | 301 | char name[16]; |
acb03d44 | 302 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 303 | pcm_err(substream->pcm, |
0ab1ace8 | 304 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
305 | name, pos, runtime->buffer_size, |
306 | runtime->period_size); | |
f240406b JK |
307 | } |
308 | pos = 0; | |
cedb8118 | 309 | } |
f240406b | 310 | pos -= pos % runtime->min_align; |
f5914908 | 311 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
312 | hw_base = runtime->hw_ptr_base; |
313 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
314 | if (in_interrupt) { |
315 | /* we know that one period was processed */ | |
316 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 317 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 318 | if (delta > new_hw_ptr) { |
bd76af0f | 319 | /* check for double acknowledged interrupts */ |
3509a03f | 320 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 321 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 322 | hw_base += runtime->buffer_size; |
0e8014d7 | 323 | if (hw_base >= runtime->boundary) { |
bd76af0f | 324 | hw_base = 0; |
0e8014d7 PLB |
325 | crossed_boundary++; |
326 | } | |
bd76af0f JK |
327 | new_hw_ptr = hw_base + pos; |
328 | goto __delta; | |
329 | } | |
1da177e4 | 330 | } |
1da177e4 | 331 | } |
f240406b JK |
332 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
333 | /* pointer crosses the end of the ring buffer */ | |
334 | if (new_hw_ptr < old_hw_ptr) { | |
335 | hw_base += runtime->buffer_size; | |
0e8014d7 | 336 | if (hw_base >= runtime->boundary) { |
f240406b | 337 | hw_base = 0; |
0e8014d7 PLB |
338 | crossed_boundary++; |
339 | } | |
f240406b JK |
340 | new_hw_ptr = hw_base + pos; |
341 | } | |
342 | __delta: | |
b406e610 CL |
343 | delta = new_hw_ptr - old_hw_ptr; |
344 | if (delta < 0) | |
345 | delta += runtime->boundary; | |
ab69a490 | 346 | |
59ff878f | 347 | if (runtime->no_period_wakeup) { |
12ff414e | 348 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
349 | /* |
350 | * Without regular period interrupts, we have to check | |
351 | * the elapsed time to detect xruns. | |
352 | */ | |
3509a03f | 353 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
354 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
355 | goto no_delta_check; | |
59ff878f | 356 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
357 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
358 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
359 | delta += runtime->buffer_size; |
360 | hw_base += runtime->buffer_size; | |
0e8014d7 | 361 | if (hw_base >= runtime->boundary) { |
59ff878f | 362 | hw_base = 0; |
0e8014d7 PLB |
363 | crossed_boundary++; |
364 | } | |
59ff878f CL |
365 | new_hw_ptr = hw_base + pos; |
366 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
367 | } | |
ab69a490 | 368 | goto no_delta_check; |
59ff878f | 369 | } |
ab69a490 | 370 | |
f240406b | 371 | /* something must be really wrong */ |
7b3a177b | 372 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
373 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
374 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
375 | substream->stream, (long)pos, | |
376 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
377 | return 0; |
378 | } | |
c87d9732 TI |
379 | |
380 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 381 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
382 | goto no_jiffies_check; |
383 | ||
3e5b5016 TI |
384 | /* Skip the jiffies check for hardwares with BATCH flag. |
385 | * Such hardware usually just increases the position at each IRQ, | |
386 | * thus it can't give any strange position. | |
387 | */ | |
388 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
389 | goto no_jiffies_check; | |
f240406b | 390 | hdelta = delta; |
a4444da3 JK |
391 | if (hdelta < runtime->delay) |
392 | goto no_jiffies_check; | |
393 | hdelta -= runtime->delay; | |
3509a03f | 394 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
395 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
396 | delta = jdelta / | |
397 | (((runtime->period_size * HZ) / runtime->rate) | |
398 | + HZ/100); | |
f240406b JK |
399 | /* move new_hw_ptr according jiffies not pos variable */ |
400 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 401 | hw_base = delta; |
f240406b JK |
402 | /* use loop to avoid checks for delta overflows */ |
403 | /* the delta value is small or zero in most cases */ | |
404 | while (delta > 0) { | |
405 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 406 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 407 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
408 | crossed_boundary--; |
409 | } | |
f240406b JK |
410 | delta--; |
411 | } | |
412 | /* align hw_base to buffer_size */ | |
f5914908 TI |
413 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
414 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
415 | (long)pos, (long)hdelta, |
416 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 417 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
418 | (unsigned long)old_hw_ptr, |
419 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
420 | /* reset values to proper state */ |
421 | delta = 0; | |
422 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 423 | } |
3e5b5016 | 424 | no_jiffies_check: |
bbf6ad13 | 425 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
426 | hw_ptr_error(substream, in_interrupt, |
427 | "Lost interrupts?", | |
428 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 429 | substream->stream, (long)delta, |
f240406b JK |
430 | (long)new_hw_ptr, |
431 | (long)old_hw_ptr); | |
ed3da3d9 | 432 | } |
f240406b | 433 | |
ab69a490 | 434 | no_delta_check: |
3179f620 | 435 | if (runtime->status->hw_ptr == new_hw_ptr) { |
e7513c57 | 436 | runtime->hw_ptr_jiffies = curr_jiffies; |
3179f620 | 437 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
f240406b | 438 | return 0; |
3179f620 | 439 | } |
ab1863fc | 440 | |
1da177e4 LT |
441 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
442 | runtime->silence_size > 0) | |
443 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
444 | ||
e7636925 | 445 | if (in_interrupt) { |
ead4046b CL |
446 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
447 | if (delta < 0) | |
448 | delta += runtime->boundary; | |
449 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
450 | runtime->hw_ptr_interrupt += delta; | |
451 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
452 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 453 | } |
ed3da3d9 | 454 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 455 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 456 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
457 | if (crossed_boundary) { |
458 | snd_BUG_ON(crossed_boundary != 1); | |
459 | runtime->hw_ptr_wrap += runtime->boundary; | |
460 | } | |
4eeaaeae | 461 | |
3179f620 | 462 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 463 | |
1250932e | 464 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
465 | } |
466 | ||
467 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 468 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 469 | { |
f240406b | 470 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
471 | } |
472 | ||
473 | /** | |
474 | * snd_pcm_set_ops - set the PCM operators | |
475 | * @pcm: the pcm instance | |
476 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
477 | * @ops: the operator table | |
478 | * | |
479 | * Sets the given PCM operators to the pcm instance. | |
480 | */ | |
e6c2e7eb LPC |
481 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
482 | const struct snd_pcm_ops *ops) | |
1da177e4 | 483 | { |
877211f5 TI |
484 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
485 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
486 | |
487 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
488 | substream->ops = ops; | |
489 | } | |
e88e8ae6 | 490 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
491 | |
492 | /** | |
493 | * snd_pcm_sync - set the PCM sync id | |
494 | * @substream: the pcm substream | |
495 | * | |
496 | * Sets the PCM sync identifier for the card. | |
497 | */ | |
877211f5 | 498 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 499 | { |
877211f5 | 500 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
501 | |
502 | runtime->sync.id32[0] = substream->pcm->card->number; | |
503 | runtime->sync.id32[1] = -1; | |
504 | runtime->sync.id32[2] = -1; | |
505 | runtime->sync.id32[3] = -1; | |
506 | } | |
e88e8ae6 TI |
507 | EXPORT_SYMBOL(snd_pcm_set_sync); |
508 | ||
1da177e4 LT |
509 | /* |
510 | * Standard ioctl routine | |
511 | */ | |
512 | ||
1da177e4 LT |
513 | static inline unsigned int div32(unsigned int a, unsigned int b, |
514 | unsigned int *r) | |
515 | { | |
516 | if (b == 0) { | |
517 | *r = 0; | |
518 | return UINT_MAX; | |
519 | } | |
520 | *r = a % b; | |
521 | return a / b; | |
522 | } | |
523 | ||
524 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
525 | { | |
526 | if (b == 0) | |
527 | return UINT_MAX; | |
528 | return a / b; | |
529 | } | |
530 | ||
531 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
532 | { | |
533 | unsigned int r; | |
534 | unsigned int q; | |
535 | if (b == 0) | |
536 | return UINT_MAX; | |
537 | q = div32(a, b, &r); | |
538 | if (r) | |
539 | ++q; | |
540 | return q; | |
541 | } | |
542 | ||
543 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
544 | { | |
545 | if (a == 0) | |
546 | return 0; | |
547 | if (div_down(UINT_MAX, a) < b) | |
548 | return UINT_MAX; | |
549 | return a * b; | |
550 | } | |
551 | ||
552 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
553 | unsigned int c, unsigned int *r) | |
554 | { | |
555 | u_int64_t n = (u_int64_t) a * b; | |
556 | if (c == 0) { | |
1da177e4 LT |
557 | *r = 0; |
558 | return UINT_MAX; | |
559 | } | |
3f7440a6 | 560 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
561 | if (n >= UINT_MAX) { |
562 | *r = 0; | |
563 | return UINT_MAX; | |
564 | } | |
565 | return n; | |
566 | } | |
567 | ||
1da177e4 LT |
568 | /** |
569 | * snd_interval_refine - refine the interval value of configurator | |
570 | * @i: the interval value to refine | |
571 | * @v: the interval value to refer to | |
572 | * | |
573 | * Refines the interval value with the reference value. | |
574 | * The interval is changed to the range satisfying both intervals. | |
575 | * The interval status (min, max, integer, etc.) are evaluated. | |
576 | * | |
eb7c06e8 YB |
577 | * Return: Positive if the value is changed, zero if it's not changed, or a |
578 | * negative error code. | |
1da177e4 | 579 | */ |
877211f5 | 580 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
581 | { |
582 | int changed = 0; | |
7eaa943c TI |
583 | if (snd_BUG_ON(snd_interval_empty(i))) |
584 | return -EINVAL; | |
1da177e4 LT |
585 | if (i->min < v->min) { |
586 | i->min = v->min; | |
587 | i->openmin = v->openmin; | |
588 | changed = 1; | |
589 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
590 | i->openmin = 1; | |
591 | changed = 1; | |
592 | } | |
593 | if (i->max > v->max) { | |
594 | i->max = v->max; | |
595 | i->openmax = v->openmax; | |
596 | changed = 1; | |
597 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
598 | i->openmax = 1; | |
599 | changed = 1; | |
600 | } | |
601 | if (!i->integer && v->integer) { | |
602 | i->integer = 1; | |
603 | changed = 1; | |
604 | } | |
605 | if (i->integer) { | |
606 | if (i->openmin) { | |
607 | i->min++; | |
608 | i->openmin = 0; | |
609 | } | |
610 | if (i->openmax) { | |
611 | i->max--; | |
612 | i->openmax = 0; | |
613 | } | |
614 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
615 | i->integer = 1; | |
616 | if (snd_interval_checkempty(i)) { | |
617 | snd_interval_none(i); | |
618 | return -EINVAL; | |
619 | } | |
620 | return changed; | |
621 | } | |
e88e8ae6 TI |
622 | EXPORT_SYMBOL(snd_interval_refine); |
623 | ||
877211f5 | 624 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 625 | { |
ff2d6acd TW |
626 | const unsigned int last_max = i->max; |
627 | ||
7eaa943c TI |
628 | if (snd_BUG_ON(snd_interval_empty(i))) |
629 | return -EINVAL; | |
1da177e4 LT |
630 | if (snd_interval_single(i)) |
631 | return 0; | |
632 | i->max = i->min; | |
ff2d6acd | 633 | if (i->openmin) |
1da177e4 | 634 | i->max++; |
ff2d6acd TW |
635 | /* only exclude max value if also excluded before refine */ |
636 | i->openmax = (i->openmax && i->max >= last_max); | |
1da177e4 LT |
637 | return 1; |
638 | } | |
639 | ||
877211f5 | 640 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 641 | { |
ff2d6acd TW |
642 | const unsigned int last_min = i->min; |
643 | ||
7eaa943c TI |
644 | if (snd_BUG_ON(snd_interval_empty(i))) |
645 | return -EINVAL; | |
1da177e4 LT |
646 | if (snd_interval_single(i)) |
647 | return 0; | |
648 | i->min = i->max; | |
ff2d6acd | 649 | if (i->openmax) |
1da177e4 | 650 | i->min--; |
ff2d6acd TW |
651 | /* only exclude min value if also excluded before refine */ |
652 | i->openmin = (i->openmin && i->min <= last_min); | |
1da177e4 LT |
653 | return 1; |
654 | } | |
655 | ||
877211f5 | 656 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
657 | { |
658 | if (a->empty || b->empty) { | |
659 | snd_interval_none(c); | |
660 | return; | |
661 | } | |
662 | c->empty = 0; | |
663 | c->min = mul(a->min, b->min); | |
664 | c->openmin = (a->openmin || b->openmin); | |
665 | c->max = mul(a->max, b->max); | |
666 | c->openmax = (a->openmax || b->openmax); | |
667 | c->integer = (a->integer && b->integer); | |
668 | } | |
669 | ||
670 | /** | |
671 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
672 | * @a: dividend |
673 | * @b: divisor | |
674 | * @c: quotient | |
1da177e4 LT |
675 | * |
676 | * c = a / b | |
677 | * | |
678 | * Returns non-zero if the value is changed, zero if not changed. | |
679 | */ | |
877211f5 | 680 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
681 | { |
682 | unsigned int r; | |
683 | if (a->empty || b->empty) { | |
684 | snd_interval_none(c); | |
685 | return; | |
686 | } | |
687 | c->empty = 0; | |
688 | c->min = div32(a->min, b->max, &r); | |
689 | c->openmin = (r || a->openmin || b->openmax); | |
690 | if (b->min > 0) { | |
691 | c->max = div32(a->max, b->min, &r); | |
692 | if (r) { | |
693 | c->max++; | |
694 | c->openmax = 1; | |
695 | } else | |
696 | c->openmax = (a->openmax || b->openmin); | |
697 | } else { | |
698 | c->max = UINT_MAX; | |
699 | c->openmax = 0; | |
700 | } | |
701 | c->integer = 0; | |
702 | } | |
703 | ||
704 | /** | |
705 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
706 | * @a: dividend 1 |
707 | * @b: dividend 2 | |
708 | * @k: divisor (as integer) | |
709 | * @c: result | |
710 | * | |
1da177e4 LT |
711 | * c = a * b / k |
712 | * | |
713 | * Returns non-zero if the value is changed, zero if not changed. | |
714 | */ | |
877211f5 TI |
715 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
716 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
717 | { |
718 | unsigned int r; | |
719 | if (a->empty || b->empty) { | |
720 | snd_interval_none(c); | |
721 | return; | |
722 | } | |
723 | c->empty = 0; | |
724 | c->min = muldiv32(a->min, b->min, k, &r); | |
725 | c->openmin = (r || a->openmin || b->openmin); | |
726 | c->max = muldiv32(a->max, b->max, k, &r); | |
727 | if (r) { | |
728 | c->max++; | |
729 | c->openmax = 1; | |
730 | } else | |
731 | c->openmax = (a->openmax || b->openmax); | |
732 | c->integer = 0; | |
733 | } | |
734 | ||
735 | /** | |
736 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
737 | * @a: dividend 1 |
738 | * @k: dividend 2 (as integer) | |
739 | * @b: divisor | |
740 | * @c: result | |
1da177e4 LT |
741 | * |
742 | * c = a * k / b | |
743 | * | |
744 | * Returns non-zero if the value is changed, zero if not changed. | |
745 | */ | |
877211f5 TI |
746 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
747 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
748 | { |
749 | unsigned int r; | |
750 | if (a->empty || b->empty) { | |
751 | snd_interval_none(c); | |
752 | return; | |
753 | } | |
754 | c->empty = 0; | |
755 | c->min = muldiv32(a->min, k, b->max, &r); | |
756 | c->openmin = (r || a->openmin || b->openmax); | |
757 | if (b->min > 0) { | |
758 | c->max = muldiv32(a->max, k, b->min, &r); | |
759 | if (r) { | |
760 | c->max++; | |
761 | c->openmax = 1; | |
762 | } else | |
763 | c->openmax = (a->openmax || b->openmin); | |
764 | } else { | |
765 | c->max = UINT_MAX; | |
766 | c->openmax = 0; | |
767 | } | |
768 | c->integer = 0; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | /* ---- */ |
772 | ||
773 | ||
774 | /** | |
775 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
776 | * @i: interval to refine |
777 | * @rats_count: number of ratnum_t | |
778 | * @rats: ratnum_t array | |
779 | * @nump: pointer to store the resultant numerator | |
780 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 781 | * |
eb7c06e8 YB |
782 | * Return: Positive if the value is changed, zero if it's not changed, or a |
783 | * negative error code. | |
1da177e4 | 784 | */ |
877211f5 | 785 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 786 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 787 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 788 | { |
8374e24c KH |
789 | unsigned int best_num, best_den; |
790 | int best_diff; | |
1da177e4 | 791 | unsigned int k; |
877211f5 | 792 | struct snd_interval t; |
1da177e4 | 793 | int err; |
8374e24c KH |
794 | unsigned int result_num, result_den; |
795 | int result_diff; | |
1da177e4 LT |
796 | |
797 | best_num = best_den = best_diff = 0; | |
798 | for (k = 0; k < rats_count; ++k) { | |
799 | unsigned int num = rats[k].num; | |
800 | unsigned int den; | |
801 | unsigned int q = i->min; | |
802 | int diff; | |
803 | if (q == 0) | |
804 | q = 1; | |
40962d7c | 805 | den = div_up(num, q); |
1da177e4 LT |
806 | if (den < rats[k].den_min) |
807 | continue; | |
808 | if (den > rats[k].den_max) | |
809 | den = rats[k].den_max; | |
810 | else { | |
811 | unsigned int r; | |
812 | r = (den - rats[k].den_min) % rats[k].den_step; | |
813 | if (r != 0) | |
814 | den -= r; | |
815 | } | |
816 | diff = num - q * den; | |
8374e24c KH |
817 | if (diff < 0) |
818 | diff = -diff; | |
1da177e4 LT |
819 | if (best_num == 0 || |
820 | diff * best_den < best_diff * den) { | |
821 | best_diff = diff; | |
822 | best_den = den; | |
823 | best_num = num; | |
824 | } | |
825 | } | |
826 | if (best_den == 0) { | |
827 | i->empty = 1; | |
828 | return -EINVAL; | |
829 | } | |
830 | t.min = div_down(best_num, best_den); | |
831 | t.openmin = !!(best_num % best_den); | |
832 | ||
8374e24c KH |
833 | result_num = best_num; |
834 | result_diff = best_diff; | |
835 | result_den = best_den; | |
1da177e4 LT |
836 | best_num = best_den = best_diff = 0; |
837 | for (k = 0; k < rats_count; ++k) { | |
838 | unsigned int num = rats[k].num; | |
839 | unsigned int den; | |
840 | unsigned int q = i->max; | |
841 | int diff; | |
842 | if (q == 0) { | |
843 | i->empty = 1; | |
844 | return -EINVAL; | |
845 | } | |
40962d7c | 846 | den = div_down(num, q); |
1da177e4 LT |
847 | if (den > rats[k].den_max) |
848 | continue; | |
849 | if (den < rats[k].den_min) | |
850 | den = rats[k].den_min; | |
851 | else { | |
852 | unsigned int r; | |
853 | r = (den - rats[k].den_min) % rats[k].den_step; | |
854 | if (r != 0) | |
855 | den += rats[k].den_step - r; | |
856 | } | |
857 | diff = q * den - num; | |
8374e24c KH |
858 | if (diff < 0) |
859 | diff = -diff; | |
1da177e4 LT |
860 | if (best_num == 0 || |
861 | diff * best_den < best_diff * den) { | |
862 | best_diff = diff; | |
863 | best_den = den; | |
864 | best_num = num; | |
865 | } | |
866 | } | |
867 | if (best_den == 0) { | |
868 | i->empty = 1; | |
869 | return -EINVAL; | |
870 | } | |
871 | t.max = div_up(best_num, best_den); | |
872 | t.openmax = !!(best_num % best_den); | |
873 | t.integer = 0; | |
874 | err = snd_interval_refine(i, &t); | |
875 | if (err < 0) | |
876 | return err; | |
877 | ||
878 | if (snd_interval_single(i)) { | |
8374e24c KH |
879 | if (best_diff * result_den < result_diff * best_den) { |
880 | result_num = best_num; | |
881 | result_den = best_den; | |
882 | } | |
1da177e4 | 883 | if (nump) |
8374e24c | 884 | *nump = result_num; |
1da177e4 | 885 | if (denp) |
8374e24c | 886 | *denp = result_den; |
1da177e4 LT |
887 | } |
888 | return err; | |
889 | } | |
e88e8ae6 TI |
890 | EXPORT_SYMBOL(snd_interval_ratnum); |
891 | ||
1da177e4 LT |
892 | /** |
893 | * snd_interval_ratden - refine the interval value | |
df8db936 | 894 | * @i: interval to refine |
877211f5 TI |
895 | * @rats_count: number of struct ratden |
896 | * @rats: struct ratden array | |
df8db936 TI |
897 | * @nump: pointer to store the resultant numerator |
898 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 899 | * |
eb7c06e8 YB |
900 | * Return: Positive if the value is changed, zero if it's not changed, or a |
901 | * negative error code. | |
1da177e4 | 902 | */ |
877211f5 | 903 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
904 | unsigned int rats_count, |
905 | const struct snd_ratden *rats, | |
1da177e4 LT |
906 | unsigned int *nump, unsigned int *denp) |
907 | { | |
908 | unsigned int best_num, best_diff, best_den; | |
909 | unsigned int k; | |
877211f5 | 910 | struct snd_interval t; |
1da177e4 LT |
911 | int err; |
912 | ||
913 | best_num = best_den = best_diff = 0; | |
914 | for (k = 0; k < rats_count; ++k) { | |
915 | unsigned int num; | |
916 | unsigned int den = rats[k].den; | |
917 | unsigned int q = i->min; | |
918 | int diff; | |
919 | num = mul(q, den); | |
920 | if (num > rats[k].num_max) | |
921 | continue; | |
922 | if (num < rats[k].num_min) | |
923 | num = rats[k].num_max; | |
924 | else { | |
925 | unsigned int r; | |
926 | r = (num - rats[k].num_min) % rats[k].num_step; | |
927 | if (r != 0) | |
928 | num += rats[k].num_step - r; | |
929 | } | |
930 | diff = num - q * den; | |
931 | if (best_num == 0 || | |
932 | diff * best_den < best_diff * den) { | |
933 | best_diff = diff; | |
934 | best_den = den; | |
935 | best_num = num; | |
936 | } | |
937 | } | |
938 | if (best_den == 0) { | |
939 | i->empty = 1; | |
940 | return -EINVAL; | |
941 | } | |
942 | t.min = div_down(best_num, best_den); | |
943 | t.openmin = !!(best_num % best_den); | |
944 | ||
945 | best_num = best_den = best_diff = 0; | |
946 | for (k = 0; k < rats_count; ++k) { | |
947 | unsigned int num; | |
948 | unsigned int den = rats[k].den; | |
949 | unsigned int q = i->max; | |
950 | int diff; | |
951 | num = mul(q, den); | |
952 | if (num < rats[k].num_min) | |
953 | continue; | |
954 | if (num > rats[k].num_max) | |
955 | num = rats[k].num_max; | |
956 | else { | |
957 | unsigned int r; | |
958 | r = (num - rats[k].num_min) % rats[k].num_step; | |
959 | if (r != 0) | |
960 | num -= r; | |
961 | } | |
962 | diff = q * den - num; | |
963 | if (best_num == 0 || | |
964 | diff * best_den < best_diff * den) { | |
965 | best_diff = diff; | |
966 | best_den = den; | |
967 | best_num = num; | |
968 | } | |
969 | } | |
970 | if (best_den == 0) { | |
971 | i->empty = 1; | |
972 | return -EINVAL; | |
973 | } | |
974 | t.max = div_up(best_num, best_den); | |
975 | t.openmax = !!(best_num % best_den); | |
976 | t.integer = 0; | |
977 | err = snd_interval_refine(i, &t); | |
978 | if (err < 0) | |
979 | return err; | |
980 | ||
981 | if (snd_interval_single(i)) { | |
982 | if (nump) | |
983 | *nump = best_num; | |
984 | if (denp) | |
985 | *denp = best_den; | |
986 | } | |
987 | return err; | |
988 | } | |
989 | ||
990 | /** | |
991 | * snd_interval_list - refine the interval value from the list | |
992 | * @i: the interval value to refine | |
993 | * @count: the number of elements in the list | |
994 | * @list: the value list | |
995 | * @mask: the bit-mask to evaluate | |
996 | * | |
997 | * Refines the interval value from the list. | |
998 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
999 | * evaluated. | |
1000 | * | |
eb7c06e8 YB |
1001 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1002 | * negative error code. | |
1da177e4 | 1003 | */ |
4af87a93 MB |
1004 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1005 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1006 | { |
1007 | unsigned int k; | |
b1ddaf68 | 1008 | struct snd_interval list_range; |
0981a260 TI |
1009 | |
1010 | if (!count) { | |
1011 | i->empty = 1; | |
1012 | return -EINVAL; | |
1013 | } | |
b1ddaf68 CL |
1014 | snd_interval_any(&list_range); |
1015 | list_range.min = UINT_MAX; | |
1016 | list_range.max = 0; | |
1da177e4 LT |
1017 | for (k = 0; k < count; k++) { |
1018 | if (mask && !(mask & (1 << k))) | |
1019 | continue; | |
b1ddaf68 | 1020 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1021 | continue; |
b1ddaf68 CL |
1022 | list_range.min = min(list_range.min, list[k]); |
1023 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1024 | } |
b1ddaf68 | 1025 | return snd_interval_refine(i, &list_range); |
1da177e4 | 1026 | } |
e88e8ae6 TI |
1027 | EXPORT_SYMBOL(snd_interval_list); |
1028 | ||
f66f898e PR |
1029 | /** |
1030 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1031 | * @i: the interval value to refine | |
1032 | * @count: the number of elements in the list of ranges | |
1033 | * @ranges: the ranges list | |
1034 | * @mask: the bit-mask to evaluate | |
1035 | * | |
1036 | * Refines the interval value from the list of ranges. | |
1037 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1038 | * evaluated. | |
1039 | * | |
1040 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1041 | * negative error code. | |
1042 | */ | |
1043 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1044 | const struct snd_interval *ranges, unsigned int mask) | |
1045 | { | |
1046 | unsigned int k; | |
1047 | struct snd_interval range_union; | |
1048 | struct snd_interval range; | |
1049 | ||
1050 | if (!count) { | |
1051 | snd_interval_none(i); | |
1052 | return -EINVAL; | |
1053 | } | |
1054 | snd_interval_any(&range_union); | |
1055 | range_union.min = UINT_MAX; | |
1056 | range_union.max = 0; | |
1057 | for (k = 0; k < count; k++) { | |
1058 | if (mask && !(mask & (1 << k))) | |
1059 | continue; | |
1060 | snd_interval_copy(&range, &ranges[k]); | |
1061 | if (snd_interval_refine(&range, i) < 0) | |
1062 | continue; | |
1063 | if (snd_interval_empty(&range)) | |
1064 | continue; | |
1065 | ||
1066 | if (range.min < range_union.min) { | |
1067 | range_union.min = range.min; | |
1068 | range_union.openmin = 1; | |
1069 | } | |
1070 | if (range.min == range_union.min && !range.openmin) | |
1071 | range_union.openmin = 0; | |
1072 | if (range.max > range_union.max) { | |
1073 | range_union.max = range.max; | |
1074 | range_union.openmax = 1; | |
1075 | } | |
1076 | if (range.max == range_union.max && !range.openmax) | |
1077 | range_union.openmax = 0; | |
1078 | } | |
1079 | return snd_interval_refine(i, &range_union); | |
1080 | } | |
1081 | EXPORT_SYMBOL(snd_interval_ranges); | |
1082 | ||
0f519b62 | 1083 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1084 | { |
1085 | unsigned int n; | |
1086 | int changed = 0; | |
0f519b62 | 1087 | n = i->min % step; |
1da177e4 LT |
1088 | if (n != 0 || i->openmin) { |
1089 | i->min += step - n; | |
df1e4719 | 1090 | i->openmin = 0; |
1da177e4 LT |
1091 | changed = 1; |
1092 | } | |
0f519b62 | 1093 | n = i->max % step; |
1da177e4 LT |
1094 | if (n != 0 || i->openmax) { |
1095 | i->max -= n; | |
df1e4719 | 1096 | i->openmax = 0; |
1da177e4 LT |
1097 | changed = 1; |
1098 | } | |
1099 | if (snd_interval_checkempty(i)) { | |
1100 | i->empty = 1; | |
1101 | return -EINVAL; | |
1102 | } | |
1103 | return changed; | |
1104 | } | |
1105 | ||
1106 | /* Info constraints helpers */ | |
1107 | ||
1108 | /** | |
1109 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1110 | * @runtime: the pcm runtime instance | |
1111 | * @cond: condition bits | |
1112 | * @var: the variable to evaluate | |
1113 | * @func: the evaluation function | |
1114 | * @private: the private data pointer passed to function | |
1115 | * @dep: the dependent variables | |
1116 | * | |
eb7c06e8 | 1117 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1118 | */ |
877211f5 | 1119 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1120 | int var, |
1121 | snd_pcm_hw_rule_func_t func, void *private, | |
1122 | int dep, ...) | |
1123 | { | |
877211f5 TI |
1124 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1125 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1126 | unsigned int k; |
1127 | va_list args; | |
1128 | va_start(args, dep); | |
1129 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1130 | struct snd_pcm_hw_rule *new; |
1da177e4 | 1131 | unsigned int new_rules = constrs->rules_all + 16; |
09b9ddfa TI |
1132 | new = krealloc(constrs->rules, new_rules * sizeof(*c), |
1133 | GFP_KERNEL); | |
87a1c8aa JJ |
1134 | if (!new) { |
1135 | va_end(args); | |
1da177e4 | 1136 | return -ENOMEM; |
87a1c8aa | 1137 | } |
1da177e4 LT |
1138 | constrs->rules = new; |
1139 | constrs->rules_all = new_rules; | |
1140 | } | |
1141 | c = &constrs->rules[constrs->rules_num]; | |
1142 | c->cond = cond; | |
1143 | c->func = func; | |
1144 | c->var = var; | |
1145 | c->private = private; | |
1146 | k = 0; | |
1147 | while (1) { | |
87a1c8aa JJ |
1148 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1149 | va_end(args); | |
7eaa943c | 1150 | return -EINVAL; |
87a1c8aa | 1151 | } |
1da177e4 LT |
1152 | c->deps[k++] = dep; |
1153 | if (dep < 0) | |
1154 | break; | |
1155 | dep = va_arg(args, int); | |
1156 | } | |
1157 | constrs->rules_num++; | |
1158 | va_end(args); | |
1159 | return 0; | |
87a1c8aa | 1160 | } |
e88e8ae6 TI |
1161 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1162 | ||
1da177e4 | 1163 | /** |
1c85cc64 | 1164 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1165 | * @runtime: PCM runtime instance |
1166 | * @var: hw_params variable to apply the mask | |
1167 | * @mask: the bitmap mask | |
1168 | * | |
1c85cc64 | 1169 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1170 | * |
1171 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1172 | */ |
877211f5 | 1173 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1174 | u_int32_t mask) |
1175 | { | |
877211f5 TI |
1176 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1177 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1178 | *maskp->bits &= mask; |
1179 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1180 | if (*maskp->bits == 0) | |
1181 | return -EINVAL; | |
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | /** | |
1c85cc64 | 1186 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1187 | * @runtime: PCM runtime instance |
1188 | * @var: hw_params variable to apply the mask | |
1189 | * @mask: the 64bit bitmap mask | |
1190 | * | |
1c85cc64 | 1191 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1192 | * |
1193 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1194 | */ |
877211f5 | 1195 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1196 | u_int64_t mask) |
1197 | { | |
877211f5 TI |
1198 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1199 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1200 | maskp->bits[0] &= (u_int32_t)mask; |
1201 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1202 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1203 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1204 | return -EINVAL; | |
1205 | return 0; | |
1206 | } | |
63a5d4c6 | 1207 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1208 | |
1209 | /** | |
1c85cc64 | 1210 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1211 | * @runtime: PCM runtime instance |
1212 | * @var: hw_params variable to apply the integer constraint | |
1213 | * | |
1214 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1215 | * |
1216 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1217 | * negative error code. | |
1da177e4 | 1218 | */ |
877211f5 | 1219 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1220 | { |
877211f5 | 1221 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1222 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1223 | } | |
e88e8ae6 TI |
1224 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1225 | ||
1da177e4 | 1226 | /** |
1c85cc64 | 1227 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1228 | * @runtime: PCM runtime instance |
1229 | * @var: hw_params variable to apply the range | |
1230 | * @min: the minimal value | |
1231 | * @max: the maximal value | |
1232 | * | |
1233 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1234 | * |
1235 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1236 | * negative error code. | |
1da177e4 | 1237 | */ |
877211f5 | 1238 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1239 | unsigned int min, unsigned int max) |
1240 | { | |
877211f5 TI |
1241 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1242 | struct snd_interval t; | |
1da177e4 LT |
1243 | t.min = min; |
1244 | t.max = max; | |
1245 | t.openmin = t.openmax = 0; | |
1246 | t.integer = 0; | |
1247 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1248 | } | |
e88e8ae6 TI |
1249 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1250 | ||
877211f5 TI |
1251 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1252 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1253 | { |
877211f5 | 1254 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1255 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1256 | } | |
1257 | ||
1258 | ||
1259 | /** | |
1c85cc64 | 1260 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1261 | * @runtime: PCM runtime instance |
1262 | * @cond: condition bits | |
1263 | * @var: hw_params variable to apply the list constraint | |
1264 | * @l: list | |
1265 | * | |
1266 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1267 | * |
1268 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1269 | */ |
877211f5 | 1270 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1271 | unsigned int cond, |
1272 | snd_pcm_hw_param_t var, | |
1464189f | 1273 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1274 | { |
1275 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1276 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1277 | var, -1); |
1278 | } | |
e88e8ae6 TI |
1279 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1280 | ||
f66f898e PR |
1281 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1282 | struct snd_pcm_hw_rule *rule) | |
1283 | { | |
1284 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1285 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1286 | r->count, r->ranges, r->mask); | |
1287 | } | |
1288 | ||
1289 | ||
1290 | /** | |
1291 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1292 | * @runtime: PCM runtime instance | |
1293 | * @cond: condition bits | |
1294 | * @var: hw_params variable to apply the list of range constraints | |
1295 | * @r: ranges | |
1296 | * | |
1297 | * Apply the list of range constraints to an interval parameter. | |
1298 | * | |
1299 | * Return: Zero if successful, or a negative error code on failure. | |
1300 | */ | |
1301 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1302 | unsigned int cond, | |
1303 | snd_pcm_hw_param_t var, | |
1304 | const struct snd_pcm_hw_constraint_ranges *r) | |
1305 | { | |
1306 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1307 | snd_pcm_hw_rule_ranges, (void *)r, | |
1308 | var, -1); | |
1309 | } | |
1310 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1311 | ||
877211f5 TI |
1312 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1313 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1314 | { |
e5e113cf | 1315 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1316 | unsigned int num = 0, den = 0; |
1317 | int err; | |
1318 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1319 | r->nrats, r->rats, &num, &den); | |
1320 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1321 | params->rate_num = num; | |
1322 | params->rate_den = den; | |
1323 | } | |
1324 | return err; | |
1325 | } | |
1326 | ||
1327 | /** | |
1c85cc64 | 1328 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1329 | * @runtime: PCM runtime instance |
1330 | * @cond: condition bits | |
1331 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1332 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1333 | * |
1334 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1335 | */ |
877211f5 | 1336 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1337 | unsigned int cond, |
1338 | snd_pcm_hw_param_t var, | |
e5e113cf | 1339 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1340 | { |
1341 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1342 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1343 | var, -1); |
1344 | } | |
e88e8ae6 TI |
1345 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1346 | ||
877211f5 TI |
1347 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1348 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1349 | { |
e5e113cf | 1350 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1351 | unsigned int num = 0, den = 0; |
1352 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1353 | r->nrats, r->rats, &num, &den); | |
1354 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1355 | params->rate_num = num; | |
1356 | params->rate_den = den; | |
1357 | } | |
1358 | return err; | |
1359 | } | |
1360 | ||
1361 | /** | |
1c85cc64 | 1362 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1363 | * @runtime: PCM runtime instance |
1364 | * @cond: condition bits | |
1365 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1366 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1367 | * |
1368 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1369 | */ |
877211f5 | 1370 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1371 | unsigned int cond, |
1372 | snd_pcm_hw_param_t var, | |
e5e113cf | 1373 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1374 | { |
1375 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1376 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1377 | var, -1); |
1378 | } | |
e88e8ae6 TI |
1379 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1380 | ||
877211f5 TI |
1381 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1382 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1383 | { |
1384 | unsigned int l = (unsigned long) rule->private; | |
1385 | int width = l & 0xffff; | |
1386 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1387 | const struct snd_interval *i = |
1388 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1389 | |
1390 | if (!snd_interval_single(i)) | |
1391 | return 0; | |
1392 | ||
1393 | if ((snd_interval_value(i) == width) || | |
1394 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1395 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1396 | |
1da177e4 LT |
1397 | return 0; |
1398 | } | |
1399 | ||
1400 | /** | |
1c85cc64 | 1401 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1402 | * @runtime: PCM runtime instance |
1403 | * @cond: condition bits | |
1404 | * @width: sample bits width | |
1405 | * @msbits: msbits width | |
eb7c06e8 | 1406 | * |
8ef9df55 LPC |
1407 | * This constraint will set the number of most significant bits (msbits) if a |
1408 | * sample format with the specified width has been select. If width is set to 0 | |
1409 | * the msbits will be set for any sample format with a width larger than the | |
1410 | * specified msbits. | |
1411 | * | |
eb7c06e8 | 1412 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1413 | */ |
877211f5 | 1414 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1415 | unsigned int cond, |
1416 | unsigned int width, | |
1417 | unsigned int msbits) | |
1418 | { | |
1419 | unsigned long l = (msbits << 16) | width; | |
1420 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1421 | snd_pcm_hw_rule_msbits, | |
1422 | (void*) l, | |
1423 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1424 | } | |
e88e8ae6 TI |
1425 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1426 | ||
877211f5 TI |
1427 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1428 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1429 | { |
1430 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1431 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1432 | } |
1433 | ||
1434 | /** | |
1c85cc64 | 1435 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1436 | * @runtime: PCM runtime instance |
1437 | * @cond: condition bits | |
1438 | * @var: hw_params variable to apply the step constraint | |
1439 | * @step: step size | |
eb7c06e8 YB |
1440 | * |
1441 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1442 | */ |
877211f5 | 1443 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1444 | unsigned int cond, |
1445 | snd_pcm_hw_param_t var, | |
1446 | unsigned long step) | |
1447 | { | |
1448 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1449 | snd_pcm_hw_rule_step, (void *) step, | |
1450 | var, -1); | |
1451 | } | |
e88e8ae6 TI |
1452 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1453 | ||
877211f5 | 1454 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1455 | { |
d03af9b8 | 1456 | static const unsigned int pow2_sizes[] = { |
1da177e4 LT |
1457 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1458 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1459 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1460 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1461 | }; | |
1462 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1463 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1464 | } | |
1465 | ||
1466 | /** | |
1c85cc64 | 1467 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1468 | * @runtime: PCM runtime instance |
1469 | * @cond: condition bits | |
1470 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1471 | * |
1472 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1473 | */ |
877211f5 | 1474 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1475 | unsigned int cond, |
1476 | snd_pcm_hw_param_t var) | |
1477 | { | |
1478 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1479 | snd_pcm_hw_rule_pow2, NULL, | |
1480 | var, -1); | |
1481 | } | |
e88e8ae6 TI |
1482 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1483 | ||
d5b702a6 CL |
1484 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1485 | struct snd_pcm_hw_rule *rule) | |
1486 | { | |
1487 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1488 | struct snd_interval *rate; | |
1489 | ||
1490 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1491 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1492 | } | |
1493 | ||
1494 | /** | |
1495 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1496 | * @runtime: PCM runtime instance | |
1497 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1498 | * |
1499 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1500 | */ |
1501 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1502 | unsigned int base_rate) | |
1503 | { | |
1504 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1505 | SNDRV_PCM_HW_PARAM_RATE, | |
1506 | snd_pcm_hw_rule_noresample_func, | |
1507 | (void *)(uintptr_t)base_rate, | |
1508 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1509 | } | |
1510 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1511 | ||
877211f5 | 1512 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1513 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1514 | { |
1515 | if (hw_is_mask(var)) { | |
1516 | snd_mask_any(hw_param_mask(params, var)); | |
1517 | params->cmask |= 1 << var; | |
1518 | params->rmask |= 1 << var; | |
1519 | return; | |
1520 | } | |
1521 | if (hw_is_interval(var)) { | |
1522 | snd_interval_any(hw_param_interval(params, var)); | |
1523 | params->cmask |= 1 << var; | |
1524 | params->rmask |= 1 << var; | |
1525 | return; | |
1526 | } | |
1527 | snd_BUG(); | |
1528 | } | |
1529 | ||
877211f5 | 1530 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1531 | { |
1532 | unsigned int k; | |
1533 | memset(params, 0, sizeof(*params)); | |
1534 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1535 | _snd_pcm_hw_param_any(params, k); | |
1536 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1537 | _snd_pcm_hw_param_any(params, k); | |
1538 | params->info = ~0U; | |
1539 | } | |
e88e8ae6 | 1540 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1541 | |
1542 | /** | |
1c85cc64 | 1543 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1544 | * @params: the hw_params instance |
1545 | * @var: parameter to retrieve | |
1c85cc64 | 1546 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1547 | * |
eb7c06e8 YB |
1548 | * Return: The value for field @var if it's fixed in configuration space |
1549 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1550 | */ |
e88e8ae6 TI |
1551 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1552 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1553 | { |
1554 | if (hw_is_mask(var)) { | |
877211f5 | 1555 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1556 | if (!snd_mask_single(mask)) |
1557 | return -EINVAL; | |
1558 | if (dir) | |
1559 | *dir = 0; | |
1560 | return snd_mask_value(mask); | |
1561 | } | |
1562 | if (hw_is_interval(var)) { | |
877211f5 | 1563 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1564 | if (!snd_interval_single(i)) |
1565 | return -EINVAL; | |
1566 | if (dir) | |
1567 | *dir = i->openmin; | |
1568 | return snd_interval_value(i); | |
1569 | } | |
1da177e4 LT |
1570 | return -EINVAL; |
1571 | } | |
e88e8ae6 | 1572 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1573 | |
877211f5 | 1574 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1575 | snd_pcm_hw_param_t var) |
1576 | { | |
1577 | if (hw_is_mask(var)) { | |
1578 | snd_mask_none(hw_param_mask(params, var)); | |
1579 | params->cmask |= 1 << var; | |
1580 | params->rmask |= 1 << var; | |
1581 | } else if (hw_is_interval(var)) { | |
1582 | snd_interval_none(hw_param_interval(params, var)); | |
1583 | params->cmask |= 1 << var; | |
1584 | params->rmask |= 1 << var; | |
1585 | } else { | |
1586 | snd_BUG(); | |
1587 | } | |
1588 | } | |
e88e8ae6 | 1589 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1590 | |
877211f5 | 1591 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1592 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1593 | { |
1594 | int changed; | |
1595 | if (hw_is_mask(var)) | |
1596 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1597 | else if (hw_is_interval(var)) | |
1598 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1599 | else |
1da177e4 | 1600 | return -EINVAL; |
7a0a8716 | 1601 | if (changed > 0) { |
1da177e4 LT |
1602 | params->cmask |= 1 << var; |
1603 | params->rmask |= 1 << var; | |
1604 | } | |
1605 | return changed; | |
1606 | } | |
1607 | ||
1608 | ||
1609 | /** | |
1c85cc64 | 1610 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1611 | * @pcm: PCM instance |
1612 | * @params: the hw_params instance | |
1613 | * @var: parameter to retrieve | |
1c85cc64 | 1614 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1615 | * |
1c85cc64 | 1616 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1617 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1618 | * |
1619 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1620 | */ |
e88e8ae6 TI |
1621 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1622 | struct snd_pcm_hw_params *params, | |
1623 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1624 | { |
1625 | int changed = _snd_pcm_hw_param_first(params, var); | |
1626 | if (changed < 0) | |
1627 | return changed; | |
1628 | if (params->rmask) { | |
1629 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1630 | if (err < 0) |
7eaa943c | 1631 | return err; |
1da177e4 LT |
1632 | } |
1633 | return snd_pcm_hw_param_value(params, var, dir); | |
1634 | } | |
e88e8ae6 TI |
1635 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1636 | ||
877211f5 | 1637 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1638 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1639 | { |
1640 | int changed; | |
1641 | if (hw_is_mask(var)) | |
1642 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1643 | else if (hw_is_interval(var)) | |
1644 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1645 | else |
1da177e4 | 1646 | return -EINVAL; |
7a0a8716 | 1647 | if (changed > 0) { |
1da177e4 LT |
1648 | params->cmask |= 1 << var; |
1649 | params->rmask |= 1 << var; | |
1650 | } | |
1651 | return changed; | |
1652 | } | |
1653 | ||
1654 | ||
1655 | /** | |
1c85cc64 | 1656 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1657 | * @pcm: PCM instance |
1658 | * @params: the hw_params instance | |
1659 | * @var: parameter to retrieve | |
1c85cc64 | 1660 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1661 | * |
1c85cc64 | 1662 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1663 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1664 | * |
1665 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1666 | */ |
e88e8ae6 TI |
1667 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1668 | struct snd_pcm_hw_params *params, | |
1669 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1670 | { |
1671 | int changed = _snd_pcm_hw_param_last(params, var); | |
1672 | if (changed < 0) | |
1673 | return changed; | |
1674 | if (params->rmask) { | |
1675 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1676 | if (err < 0) |
7eaa943c | 1677 | return err; |
1da177e4 LT |
1678 | } |
1679 | return snd_pcm_hw_param_value(params, var, dir); | |
1680 | } | |
e88e8ae6 | 1681 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 | 1682 | |
877211f5 | 1683 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1684 | void *arg) |
1685 | { | |
877211f5 | 1686 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1687 | unsigned long flags; |
1688 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1689 | if (snd_pcm_running(substream) && | |
1690 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1691 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1692 | else { |
1da177e4 | 1693 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1694 | runtime->hw_ptr_wrap = 0; |
1695 | } | |
1da177e4 LT |
1696 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1697 | return 0; | |
1698 | } | |
1699 | ||
877211f5 | 1700 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1701 | void *arg) |
1702 | { | |
877211f5 TI |
1703 | struct snd_pcm_channel_info *info = arg; |
1704 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1705 | int width; |
1706 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1707 | info->offset = -1; | |
1708 | return 0; | |
1709 | } | |
1710 | width = snd_pcm_format_physical_width(runtime->format); | |
1711 | if (width < 0) | |
1712 | return width; | |
1713 | info->offset = 0; | |
1714 | switch (runtime->access) { | |
1715 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1716 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1717 | info->first = info->channel * width; | |
1718 | info->step = runtime->channels * width; | |
1719 | break; | |
1720 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1721 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1722 | { | |
1723 | size_t size = runtime->dma_bytes / runtime->channels; | |
1724 | info->first = info->channel * size * 8; | |
1725 | info->step = width; | |
1726 | break; | |
1727 | } | |
1728 | default: | |
1729 | snd_BUG(); | |
1730 | break; | |
1731 | } | |
1732 | return 0; | |
1733 | } | |
1734 | ||
8bea869c JK |
1735 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1736 | void *arg) | |
1737 | { | |
1738 | struct snd_pcm_hw_params *params = arg; | |
1739 | snd_pcm_format_t format; | |
a9960e6a CL |
1740 | int channels; |
1741 | ssize_t frame_size; | |
8bea869c JK |
1742 | |
1743 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1744 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1745 | format = params_format(params); | |
1746 | channels = params_channels(params); | |
a9960e6a CL |
1747 | frame_size = snd_pcm_format_size(format, channels); |
1748 | if (frame_size > 0) | |
1749 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1750 | } |
1751 | return 0; | |
1752 | } | |
1753 | ||
1da177e4 LT |
1754 | /** |
1755 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1756 | * @substream: the pcm substream instance | |
1757 | * @cmd: ioctl command | |
1758 | * @arg: ioctl argument | |
1759 | * | |
1760 | * Processes the generic ioctl commands for PCM. | |
1761 | * Can be passed as the ioctl callback for PCM ops. | |
1762 | * | |
eb7c06e8 | 1763 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1764 | */ |
877211f5 | 1765 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1766 | unsigned int cmd, void *arg) |
1767 | { | |
1768 | switch (cmd) { | |
1da177e4 LT |
1769 | case SNDRV_PCM_IOCTL1_RESET: |
1770 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1771 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1772 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1773 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1774 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1775 | } |
1776 | return -ENXIO; | |
1777 | } | |
e88e8ae6 TI |
1778 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1779 | ||
1da177e4 LT |
1780 | /** |
1781 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1782 | * @substream: the pcm substream instance | |
1783 | * | |
1784 | * This function is called from the interrupt handler when the | |
1785 | * PCM has processed the period size. It will update the current | |
31e8960b | 1786 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1787 | * |
1788 | * Even if more than one periods have elapsed since the last call, you | |
1789 | * have to call this only once. | |
1790 | */ | |
877211f5 | 1791 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1792 | { |
877211f5 | 1793 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1794 | unsigned long flags; |
1795 | ||
f5cdc9d4 | 1796 | if (snd_BUG_ON(!substream)) |
7eaa943c | 1797 | return; |
1da177e4 | 1798 | |
1da177e4 | 1799 | snd_pcm_stream_lock_irqsave(substream, flags); |
f5cdc9d4 | 1800 | if (PCM_RUNTIME_CHECK(substream)) |
1801 | goto _unlock; | |
1802 | runtime = substream->runtime; | |
1803 | ||
1da177e4 | 1804 | if (!snd_pcm_running(substream) || |
f240406b | 1805 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1806 | goto _end; |
1807 | ||
90bbaf66 | 1808 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1809 | if (substream->timer_running) |
1810 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1811 | #endif |
1da177e4 | 1812 | _end: |
1da177e4 | 1813 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); |
f5cdc9d4 | 1814 | _unlock: |
3aa02cb6 | 1815 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 | 1816 | } |
e88e8ae6 TI |
1817 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1818 | ||
13075510 TI |
1819 | /* |
1820 | * Wait until avail_min data becomes available | |
1821 | * Returns a negative error code if any error occurs during operation. | |
1822 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1823 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1824 | */ | |
5daeba34 | 1825 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1826 | snd_pcm_uframes_t *availp) |
1827 | { | |
1828 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1829 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1830 | wait_queue_entry_t wait; |
13075510 TI |
1831 | int err = 0; |
1832 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1833 | long wait_time, tout; |
1834 | ||
763437a9 AV |
1835 | init_waitqueue_entry(&wait, current); |
1836 | set_current_state(TASK_INTERRUPTIBLE); | |
1837 | add_wait_queue(&runtime->tsleep, &wait); | |
1838 | ||
f2b3614c TI |
1839 | if (runtime->no_period_wakeup) |
1840 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1841 | else { | |
d64c5cf8 LG |
1842 | /* use wait time from substream if available */ |
1843 | if (substream->wait_time) { | |
1844 | wait_time = substream->wait_time; | |
1845 | } else { | |
1846 | wait_time = 10; | |
1847 | ||
1848 | if (runtime->rate) { | |
1849 | long t = runtime->period_size * 2 / | |
1850 | runtime->rate; | |
1851 | wait_time = max(t, wait_time); | |
1852 | } | |
1853 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
f2b3614c | 1854 | } |
f2b3614c | 1855 | } |
763437a9 | 1856 | |
13075510 TI |
1857 | for (;;) { |
1858 | if (signal_pending(current)) { | |
1859 | err = -ERESTARTSYS; | |
1860 | break; | |
1861 | } | |
763437a9 AV |
1862 | |
1863 | /* | |
1864 | * We need to check if space became available already | |
1865 | * (and thus the wakeup happened already) first to close | |
1866 | * the race of space already having become available. | |
1867 | * This check must happen after been added to the waitqueue | |
1868 | * and having current state be INTERRUPTIBLE. | |
1869 | */ | |
763e5067 | 1870 | avail = snd_pcm_avail(substream); |
763437a9 AV |
1871 | if (avail >= runtime->twake) |
1872 | break; | |
13075510 | 1873 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1874 | |
1875 | tout = schedule_timeout(wait_time); | |
1876 | ||
13075510 | 1877 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1878 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1879 | switch (runtime->status->state) { |
1880 | case SNDRV_PCM_STATE_SUSPENDED: | |
1881 | err = -ESTRPIPE; | |
1882 | goto _endloop; | |
1883 | case SNDRV_PCM_STATE_XRUN: | |
1884 | err = -EPIPE; | |
1885 | goto _endloop; | |
1886 | case SNDRV_PCM_STATE_DRAINING: | |
1887 | if (is_playback) | |
1888 | err = -EPIPE; | |
1889 | else | |
1890 | avail = 0; /* indicate draining */ | |
1891 | goto _endloop; | |
1892 | case SNDRV_PCM_STATE_OPEN: | |
1893 | case SNDRV_PCM_STATE_SETUP: | |
1894 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1895 | err = -EBADFD; | |
1896 | goto _endloop; | |
ed697e1a JK |
1897 | case SNDRV_PCM_STATE_PAUSED: |
1898 | continue; | |
13075510 TI |
1899 | } |
1900 | if (!tout) { | |
09e56df8 TI |
1901 | pcm_dbg(substream->pcm, |
1902 | "%s write error (DMA or IRQ trouble?)\n", | |
1903 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1904 | err = -EIO; |
1905 | break; | |
1906 | } | |
13075510 TI |
1907 | } |
1908 | _endloop: | |
763437a9 | 1909 | set_current_state(TASK_RUNNING); |
c91a988d | 1910 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1911 | *availp = avail; |
1912 | return err; | |
1913 | } | |
1914 | ||
9f600630 TI |
1915 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1916 | int channel, unsigned long hwoff, | |
1917 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1918 | |
9f600630 TI |
1919 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1920 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1921 | ||
1922 | /* calculate the target DMA-buffer position to be written/read */ | |
1923 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1924 | int channel, unsigned long hwoff) | |
1da177e4 | 1925 | { |
9f600630 TI |
1926 | return runtime->dma_area + hwoff + |
1927 | channel * (runtime->dma_bytes / runtime->channels); | |
1928 | } | |
1929 | ||
5c7264cf TI |
1930 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1931 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1932 | int channel, unsigned long hwoff, | |
1933 | void *buf, unsigned long bytes) | |
9f600630 TI |
1934 | { |
1935 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1936 | (void __user *)buf, bytes)) |
9f600630 TI |
1937 | return -EFAULT; |
1938 | return 0; | |
1939 | } | |
1940 | ||
68541213 TI |
1941 | /* default copy_kernel ops for write */ |
1942 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, | |
1943 | int channel, unsigned long hwoff, | |
1944 | void *buf, unsigned long bytes) | |
1945 | { | |
1946 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); | |
1da177e4 LT |
1947 | return 0; |
1948 | } | |
1da177e4 | 1949 | |
9f600630 TI |
1950 | /* fill silence instead of copy data; called as a transfer helper |
1951 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1952 | * a NULL buffer is passed | |
1953 | */ | |
1954 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
1955 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 1956 | { |
877211f5 | 1957 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1958 | |
9f600630 | 1959 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
1da177e4 | 1960 | return 0; |
9f600630 TI |
1961 | if (substream->ops->fill_silence) |
1962 | return substream->ops->fill_silence(substream, channel, | |
1963 | hwoff, bytes); | |
1da177e4 | 1964 | |
9f600630 TI |
1965 | snd_pcm_format_set_silence(runtime->format, |
1966 | get_dma_ptr(runtime, channel, hwoff), | |
1967 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
1968 | return 0; |
1969 | } | |
1da177e4 | 1970 | |
5c7264cf TI |
1971 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
1972 | static int default_read_copy(struct snd_pcm_substream *substream, | |
1973 | int channel, unsigned long hwoff, | |
1974 | void *buf, unsigned long bytes) | |
1975 | { | |
1976 | if (copy_to_user((void __user *)buf, | |
1977 | get_dma_ptr(substream->runtime, channel, hwoff), | |
1978 | bytes)) | |
1979 | return -EFAULT; | |
1980 | return 0; | |
1981 | } | |
1da177e4 | 1982 | |
68541213 TI |
1983 | /* default copy_kernel ops for read */ |
1984 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, | |
1985 | int channel, unsigned long hwoff, | |
1986 | void *buf, unsigned long bytes) | |
1987 | { | |
1988 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); | |
1989 | return 0; | |
1990 | } | |
1991 | ||
9f600630 TI |
1992 | /* call transfer function with the converted pointers and sizes; |
1993 | * for interleaved mode, it's one shot for all samples | |
1994 | */ | |
1995 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
1996 | snd_pcm_uframes_t hwoff, void *data, | |
1997 | snd_pcm_uframes_t off, | |
1998 | snd_pcm_uframes_t frames, | |
1999 | pcm_transfer_f transfer) | |
2000 | { | |
2001 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2002 | ||
2003 | /* convert to bytes */ | |
2004 | hwoff = frames_to_bytes(runtime, hwoff); | |
2005 | off = frames_to_bytes(runtime, off); | |
2006 | frames = frames_to_bytes(runtime, frames); | |
2007 | return transfer(substream, 0, hwoff, data + off, frames); | |
2008 | } | |
2009 | ||
2010 | /* call transfer function with the converted pointers and sizes for each | |
2011 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
2012 | */ | |
2013 | static int noninterleaved_copy(struct snd_pcm_substream *substream, | |
2014 | snd_pcm_uframes_t hwoff, void *data, | |
2015 | snd_pcm_uframes_t off, | |
2016 | snd_pcm_uframes_t frames, | |
2017 | pcm_transfer_f transfer) | |
bdc4acf7 TI |
2018 | { |
2019 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2020 | int channels = runtime->channels; |
9f600630 TI |
2021 | void **bufs = data; |
2022 | int c, err; | |
2023 | ||
2024 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2025 | * in non-interleaved mode, we copy for each channel, thus | |
2026 | * each copy is n_samples bytes x channels = whole frames. | |
2027 | */ | |
2028 | off = samples_to_bytes(runtime, off); | |
2029 | frames = samples_to_bytes(runtime, frames); | |
2030 | hwoff = samples_to_bytes(runtime, hwoff); | |
2031 | for (c = 0; c < channels; ++c, ++bufs) { | |
2032 | if (!data || !*bufs) | |
2033 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2034 | else | |
2035 | err = transfer(substream, c, hwoff, *bufs + off, | |
2036 | frames); | |
2037 | if (err < 0) | |
2038 | return err; | |
1da177e4 | 2039 | } |
bdc4acf7 TI |
2040 | return 0; |
2041 | } | |
2042 | ||
a9cd29e7 TI |
2043 | /* fill silence on the given buffer position; |
2044 | * called from snd_pcm_playback_silence() | |
2045 | */ | |
2046 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2047 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2048 | { | |
2049 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2050 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2051 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2052 | fill_silence); | |
2053 | else | |
2054 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2055 | fill_silence); | |
1da177e4 LT |
2056 | } |
2057 | ||
7eaa943c TI |
2058 | /* sanity-check for read/write methods */ |
2059 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2060 | { |
877211f5 | 2061 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2062 | if (PCM_RUNTIME_CHECK(substream)) |
2063 | return -ENXIO; | |
1da177e4 | 2064 | runtime = substream->runtime; |
bdc4acf7 | 2065 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
7eaa943c | 2066 | return -EINVAL; |
1da177e4 LT |
2067 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2068 | return -EBADFD; | |
7eaa943c TI |
2069 | return 0; |
2070 | } | |
2071 | ||
6ba63929 | 2072 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
7eaa943c | 2073 | { |
6ba63929 TI |
2074 | switch (runtime->status->state) { |
2075 | case SNDRV_PCM_STATE_PREPARED: | |
2076 | case SNDRV_PCM_STATE_RUNNING: | |
2077 | case SNDRV_PCM_STATE_PAUSED: | |
2078 | return 0; | |
2079 | case SNDRV_PCM_STATE_XRUN: | |
2080 | return -EPIPE; | |
2081 | case SNDRV_PCM_STATE_SUSPENDED: | |
2082 | return -ESTRPIPE; | |
2083 | default: | |
2084 | return -EBADFD; | |
2085 | } | |
1da177e4 LT |
2086 | } |
2087 | ||
66e01a5c TS |
2088 | /* update to the given appl_ptr and call ack callback if needed; |
2089 | * when an error is returned, take back to the original value | |
2090 | */ | |
2091 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, | |
2092 | snd_pcm_uframes_t appl_ptr) | |
1da177e4 | 2093 | { |
877211f5 | 2094 | struct snd_pcm_runtime *runtime = substream->runtime; |
66e01a5c TS |
2095 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
2096 | int ret; | |
2097 | ||
f8ff2f28 TI |
2098 | if (old_appl_ptr == appl_ptr) |
2099 | return 0; | |
2100 | ||
66e01a5c TS |
2101 | runtime->control->appl_ptr = appl_ptr; |
2102 | if (substream->ops->ack) { | |
2103 | ret = substream->ops->ack(substream); | |
2104 | if (ret < 0) { | |
2105 | runtime->control->appl_ptr = old_appl_ptr; | |
2106 | return ret; | |
1da177e4 LT |
2107 | } |
2108 | } | |
fccf5388 TS |
2109 | |
2110 | trace_applptr(substream, old_appl_ptr, appl_ptr); | |
2111 | ||
1da177e4 LT |
2112 | return 0; |
2113 | } | |
66e01a5c | 2114 | |
5c7264cf TI |
2115 | /* the common loop for read/write data */ |
2116 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2117 | void *data, bool interleaved, | |
68541213 | 2118 | snd_pcm_uframes_t size, bool in_kernel) |
1da177e4 | 2119 | { |
877211f5 | 2120 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2121 | snd_pcm_uframes_t xfer = 0; |
2122 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2123 | snd_pcm_uframes_t avail; |
9f600630 TI |
2124 | pcm_copy_f writer; |
2125 | pcm_transfer_f transfer; | |
c48f12ee | 2126 | bool nonblock; |
5c7264cf | 2127 | bool is_playback; |
7eaa943c | 2128 | int err; |
1da177e4 | 2129 | |
7eaa943c TI |
2130 | err = pcm_sanity_check(substream); |
2131 | if (err < 0) | |
2132 | return err; | |
e88e8ae6 | 2133 | |
5c7264cf | 2134 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2135 | if (interleaved) { |
2136 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2137 | runtime->channels > 1) | |
2138 | return -EINVAL; | |
9f600630 | 2139 | writer = interleaved_copy; |
1da177e4 | 2140 | } else { |
c48f12ee TI |
2141 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2142 | return -EINVAL; | |
9f600630 | 2143 | writer = noninterleaved_copy; |
1da177e4 | 2144 | } |
1da177e4 | 2145 | |
9f600630 | 2146 | if (!data) { |
5c7264cf TI |
2147 | if (is_playback) |
2148 | transfer = fill_silence; | |
2149 | else | |
2150 | return -EINVAL; | |
68541213 TI |
2151 | } else if (in_kernel) { |
2152 | if (substream->ops->copy_kernel) | |
2153 | transfer = substream->ops->copy_kernel; | |
2154 | else | |
2155 | transfer = is_playback ? | |
2156 | default_write_copy_kernel : default_read_copy_kernel; | |
9f600630 TI |
2157 | } else { |
2158 | if (substream->ops->copy_user) | |
2159 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2160 | else | |
5c7264cf TI |
2161 | transfer = is_playback ? |
2162 | default_write_copy : default_read_copy; | |
c48f12ee | 2163 | } |
1da177e4 LT |
2164 | |
2165 | if (size == 0) | |
2166 | return 0; | |
1da177e4 | 2167 | |
c48f12ee TI |
2168 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2169 | ||
1da177e4 | 2170 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2171 | err = pcm_accessible_state(runtime); |
2172 | if (err < 0) | |
1da177e4 | 2173 | goto _end_unlock; |
1da177e4 | 2174 | |
64b6acf6 RBP |
2175 | runtime->twake = runtime->control->avail_min ? : 1; |
2176 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) | |
2177 | snd_pcm_update_hw_ptr(substream); | |
2178 | ||
932a8151 RBP |
2179 | /* |
2180 | * If size < start_threshold, wait indefinitely. Another | |
2181 | * thread may start capture | |
2182 | */ | |
5c7264cf | 2183 | if (!is_playback && |
00a399ca TI |
2184 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
2185 | size >= runtime->start_threshold) { | |
2186 | err = snd_pcm_start(substream); | |
2187 | if (err < 0) | |
6ba63929 | 2188 | goto _end_unlock; |
1da177e4 LT |
2189 | } |
2190 | ||
763e5067 | 2191 | avail = snd_pcm_avail(substream); |
64b6acf6 | 2192 | |
1da177e4 LT |
2193 | while (size > 0) { |
2194 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2195 | snd_pcm_uframes_t cont; |
13075510 | 2196 | if (!avail) { |
5c7264cf TI |
2197 | if (!is_playback && |
2198 | runtime->status->state == SNDRV_PCM_STATE_DRAINING) { | |
13075510 | 2199 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2200 | goto _end_unlock; |
2201 | } | |
1da177e4 LT |
2202 | if (nonblock) { |
2203 | err = -EAGAIN; | |
2204 | goto _end_unlock; | |
2205 | } | |
5daeba34 DD |
2206 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2207 | runtime->control->avail_min ? : 1); | |
2208 | err = wait_for_avail(substream, &avail); | |
13075510 | 2209 | if (err < 0) |
443feb88 | 2210 | goto _end_unlock; |
13075510 TI |
2211 | if (!avail) |
2212 | continue; /* draining */ | |
1da177e4 | 2213 | } |
1da177e4 | 2214 | frames = size > avail ? avail : size; |
aa30db06 TI |
2215 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
2216 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2217 | cont = runtime->buffer_size - appl_ofs; | |
1da177e4 LT |
2218 | if (frames > cont) |
2219 | frames = cont; | |
7eaa943c | 2220 | if (snd_BUG_ON(!frames)) { |
315d9f1b TI |
2221 | err = -EINVAL; |
2222 | goto _end_unlock; | |
7eaa943c | 2223 | } |
1da177e4 | 2224 | snd_pcm_stream_unlock_irq(substream); |
5c7264cf | 2225 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2226 | transfer); |
1da177e4 | 2227 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2228 | if (err < 0) |
2229 | goto _end_unlock; | |
6ba63929 TI |
2230 | err = pcm_accessible_state(runtime); |
2231 | if (err < 0) | |
1da177e4 | 2232 | goto _end_unlock; |
1da177e4 LT |
2233 | appl_ptr += frames; |
2234 | if (appl_ptr >= runtime->boundary) | |
2235 | appl_ptr -= runtime->boundary; | |
66e01a5c TS |
2236 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
2237 | if (err < 0) | |
2238 | goto _end_unlock; | |
1da177e4 LT |
2239 | |
2240 | offset += frames; | |
2241 | size -= frames; | |
2242 | xfer += frames; | |
0910c216 | 2243 | avail -= frames; |
5c7264cf TI |
2244 | if (is_playback && |
2245 | runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
2246 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2247 | err = snd_pcm_start(substream); | |
2248 | if (err < 0) | |
2249 | goto _end_unlock; | |
2250 | } | |
1da177e4 LT |
2251 | } |
2252 | _end_unlock: | |
c91a988d | 2253 | runtime->twake = 0; |
1250932e JK |
2254 | if (xfer > 0 && err >= 0) |
2255 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2256 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2257 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2258 | } | |
5c7264cf | 2259 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2260 | |
2261 | /* | |
2262 | * standard channel mapping helpers | |
2263 | */ | |
2264 | ||
2265 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2266 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2267 | { .channels = 1, | |
5efbc261 | 2268 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2269 | { .channels = 2, |
2270 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2271 | { .channels = 4, | |
2272 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2273 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2274 | { .channels = 6, | |
2275 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2276 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2277 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2278 | { .channels = 8, | |
2279 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2280 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2281 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2282 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2283 | { } | |
2284 | }; | |
2285 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2286 | ||
2287 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2288 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2289 | { .channels = 1, | |
5efbc261 | 2290 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2291 | { .channels = 2, |
2292 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2293 | { .channels = 4, | |
2294 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2295 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2296 | { .channels = 6, | |
2297 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2298 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2299 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2300 | { .channels = 8, | |
2301 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2302 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2303 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2304 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2305 | { } | |
2306 | }; | |
2307 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2308 | ||
2309 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2310 | { | |
2311 | if (ch > info->max_channels) | |
2312 | return false; | |
2313 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2314 | } | |
2315 | ||
2316 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2317 | struct snd_ctl_elem_info *uinfo) | |
2318 | { | |
2319 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2320 | ||
2321 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2d3391ec TI |
2322 | uinfo->count = info->max_channels; |
2323 | uinfo->value.integer.min = 0; | |
2324 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2325 | return 0; | |
2326 | } | |
2327 | ||
2328 | /* get callback for channel map ctl element | |
2329 | * stores the channel position firstly matching with the current channels | |
2330 | */ | |
2331 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2332 | struct snd_ctl_elem_value *ucontrol) | |
2333 | { | |
2334 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2335 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2336 | struct snd_pcm_substream *substream; | |
2337 | const struct snd_pcm_chmap_elem *map; | |
2338 | ||
2deaeaf1 | 2339 | if (!info->chmap) |
2d3391ec TI |
2340 | return -EINVAL; |
2341 | substream = snd_pcm_chmap_substream(info, idx); | |
2342 | if (!substream) | |
2343 | return -ENODEV; | |
2344 | memset(ucontrol->value.integer.value, 0, | |
fbd3eb7f | 2345 | sizeof(long) * info->max_channels); |
2d3391ec TI |
2346 | if (!substream->runtime) |
2347 | return 0; /* no channels set */ | |
2348 | for (map = info->chmap; map->channels; map++) { | |
2349 | int i; | |
2350 | if (map->channels == substream->runtime->channels && | |
2351 | valid_chmap_channels(info, map->channels)) { | |
2352 | for (i = 0; i < map->channels; i++) | |
2353 | ucontrol->value.integer.value[i] = map->map[i]; | |
2354 | return 0; | |
2355 | } | |
2356 | } | |
2357 | return -EINVAL; | |
2358 | } | |
2359 | ||
2360 | /* tlv callback for channel map ctl element | |
2361 | * expands the pre-defined channel maps in a form of TLV | |
2362 | */ | |
2363 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2364 | unsigned int size, unsigned int __user *tlv) | |
2365 | { | |
2366 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2367 | const struct snd_pcm_chmap_elem *map; | |
2368 | unsigned int __user *dst; | |
2369 | int c, count = 0; | |
2370 | ||
2deaeaf1 | 2371 | if (!info->chmap) |
2d3391ec TI |
2372 | return -EINVAL; |
2373 | if (size < 8) | |
2374 | return -ENOMEM; | |
2375 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2376 | return -EFAULT; | |
2377 | size -= 8; | |
2378 | dst = tlv + 2; | |
2379 | for (map = info->chmap; map->channels; map++) { | |
2380 | int chs_bytes = map->channels * 4; | |
2381 | if (!valid_chmap_channels(info, map->channels)) | |
2382 | continue; | |
2383 | if (size < 8) | |
2384 | return -ENOMEM; | |
2385 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2386 | put_user(chs_bytes, dst + 1)) | |
2387 | return -EFAULT; | |
2388 | dst += 2; | |
2389 | size -= 8; | |
2390 | count += 8; | |
2391 | if (size < chs_bytes) | |
2392 | return -ENOMEM; | |
2393 | size -= chs_bytes; | |
2394 | count += chs_bytes; | |
2395 | for (c = 0; c < map->channels; c++) { | |
2396 | if (put_user(map->map[c], dst)) | |
2397 | return -EFAULT; | |
2398 | dst++; | |
2399 | } | |
2400 | } | |
2401 | if (put_user(count, tlv + 1)) | |
2402 | return -EFAULT; | |
2403 | return 0; | |
2404 | } | |
2405 | ||
2406 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2407 | { | |
2408 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2409 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2410 | kfree(info); | |
2411 | } | |
2412 | ||
2413 | /** | |
2414 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2415 | * @pcm: the assigned PCM instance | |
2416 | * @stream: stream direction | |
2417 | * @chmap: channel map elements (for query) | |
2418 | * @max_channels: the max number of channels for the stream | |
2419 | * @private_value: the value passed to each kcontrol's private_value field | |
2420 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2421 | * | |
2422 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2423 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2424 | */ |
2425 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2426 | const struct snd_pcm_chmap_elem *chmap, | |
2427 | int max_channels, | |
2428 | unsigned long private_value, | |
2429 | struct snd_pcm_chmap **info_ret) | |
2430 | { | |
2431 | struct snd_pcm_chmap *info; | |
2432 | struct snd_kcontrol_new knew = { | |
2433 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2434 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2435 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2436 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2437 | .info = pcm_chmap_ctl_info, | |
2438 | .get = pcm_chmap_ctl_get, | |
2439 | .tlv.c = pcm_chmap_ctl_tlv, | |
2440 | }; | |
2441 | int err; | |
2442 | ||
8d879be8 TI |
2443 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2444 | return -EBUSY; | |
2d3391ec TI |
2445 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2446 | if (!info) | |
2447 | return -ENOMEM; | |
2448 | info->pcm = pcm; | |
2449 | info->stream = stream; | |
2450 | info->chmap = chmap; | |
2451 | info->max_channels = max_channels; | |
2452 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2453 | knew.name = "Playback Channel Map"; | |
2454 | else | |
2455 | knew.name = "Capture Channel Map"; | |
2456 | knew.device = pcm->device; | |
2457 | knew.count = pcm->streams[stream].substream_count; | |
2458 | knew.private_value = private_value; | |
2459 | info->kctl = snd_ctl_new1(&knew, info); | |
2460 | if (!info->kctl) { | |
2461 | kfree(info); | |
2462 | return -ENOMEM; | |
2463 | } | |
2464 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2465 | err = snd_ctl_add(pcm->card, info->kctl); | |
2466 | if (err < 0) | |
2467 | return err; | |
2468 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2469 | if (info_ret) | |
2470 | *info_ret = info; | |
2471 | return 0; | |
2472 | } | |
2473 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |