Commit | Line | Data |
---|---|---|
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 | */ | |
d7f5dd97 | 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; |
d7f5dd97 | 48 | snd_pcm_uframes_t frames, ofs, transfer; |
29d1a873 | 49 | int err; |
1da177e4 LT |
50 | |
51 | if (runtime->silence_size < runtime->boundary) { | |
d7f5dd97 JK |
52 | snd_pcm_sframes_t noise_dist, n; |
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; | |
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; | |
62 | runtime->silence_start = appl_ptr; | |
63 | } | |
64 | if (runtime->silence_filled >= runtime->buffer_size) | |
9f656705 | 65 | return; |
d7f5dd97 JK |
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; | |
1da177e4 LT |
70 | if (frames > runtime->silence_size) |
71 | frames = runtime->silence_size; | |
72 | } else { | |
d7f5dd97 JK |
73 | /* |
74 | * This filling mode aims at free-running mode (used for example by dmix), | |
75 | * which doesn't update the application pointer. | |
76 | */ | |
77 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
78 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
79 | if (avail > runtime->buffer_size) | |
80 | avail = runtime->buffer_size; | |
81 | runtime->silence_filled = avail > 0 ? avail : 0; | |
82 | runtime->silence_start = (runtime->status->hw_ptr + | |
83 | runtime->silence_filled) % | |
84 | runtime->boundary; | |
85 | } else { | |
86 | ofs = runtime->status->hw_ptr; | |
87 | frames = new_hw_ptr - ofs; | |
88 | if ((snd_pcm_sframes_t)frames < 0) | |
89 | frames += runtime->boundary; | |
90 | runtime->silence_filled -= frames; | |
91 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
92 | runtime->silence_filled = 0; | |
93 | runtime->silence_start = new_hw_ptr; | |
94 | } else { | |
95 | runtime->silence_start = ofs; | |
96 | } | |
97 | } | |
98 | frames = runtime->buffer_size - runtime->silence_filled; | |
1da177e4 | 99 | } |
7eaa943c TI |
100 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
101 | return; | |
d7f5dd97 JK |
102 | if (frames == 0) |
103 | return; | |
104 | ofs = runtime->silence_start % runtime->buffer_size; | |
105 | while (frames > 0) { | |
1da177e4 | 106 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; |
a9cd29e7 TI |
107 | err = fill_silence_frames(substream, ofs, transfer); |
108 | snd_BUG_ON(err < 0); | |
1da177e4 LT |
109 | runtime->silence_filled += transfer; |
110 | frames -= transfer; | |
111 | ofs = 0; | |
d7f5dd97 | 112 | } |
a25684a9 | 113 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); |
1da177e4 LT |
114 | } |
115 | ||
acb03d44 EB |
116 | #ifdef CONFIG_SND_DEBUG |
117 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
118 | char *name, size_t len) |
119 | { | |
120 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
121 | substream->pcm->card->number, | |
122 | substream->pcm->device, | |
123 | substream->stream ? 'c' : 'p', | |
124 | substream->number); | |
125 | } | |
acb03d44 EB |
126 | EXPORT_SYMBOL(snd_pcm_debug_name); |
127 | #endif | |
c0070110 | 128 | |
741b20cf JK |
129 | #define XRUN_DEBUG_BASIC (1<<0) |
130 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
131 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 132 | |
ed3da3d9 | 133 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 134 | |
741b20cf JK |
135 | #define xrun_debug(substream, mask) \ |
136 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
137 | #else |
138 | #define xrun_debug(substream, mask) 0 | |
139 | #endif | |
ed3da3d9 | 140 | |
741b20cf JK |
141 | #define dump_stack_on_xrun(substream) do { \ |
142 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
143 | dump_stack(); \ | |
ed3da3d9 TI |
144 | } while (0) |
145 | ||
9cd641ed TI |
146 | /* call with stream lock held */ |
147 | void __snd_pcm_xrun(struct snd_pcm_substream *substream) | |
1da177e4 | 148 | { |
13f040f9 JK |
149 | struct snd_pcm_runtime *runtime = substream->runtime; |
150 | ||
f5914908 | 151 | trace_xrun(substream); |
fcae40c9 BW |
152 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
153 | struct timespec64 tstamp; | |
154 | ||
155 | snd_pcm_gettime(runtime, &tstamp); | |
80fe7430 AB |
156 | runtime->status->tstamp.tv_sec = tstamp.tv_sec; |
157 | runtime->status->tstamp.tv_nsec = tstamp.tv_nsec; | |
fcae40c9 | 158 | } |
1da177e4 | 159 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 160 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 161 | char name[16]; |
acb03d44 | 162 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 163 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 164 | dump_stack_on_xrun(substream); |
1da177e4 | 165 | } |
1da177e4 LT |
166 | } |
167 | ||
0f17014b | 168 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 169 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 170 | do { \ |
f5914908 | 171 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 172 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
173 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
174 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
175 | dump_stack_on_xrun(substream); \ |
176 | } \ | |
177 | } while (0) | |
178 | ||
4d96eb25 JK |
179 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
180 | ||
4d96eb25 | 181 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
182 | |
183 | #endif | |
184 | ||
1250932e JK |
185 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
186 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
187 | { |
188 | snd_pcm_uframes_t avail; | |
189 | ||
763e5067 | 190 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
191 | if (avail > runtime->avail_max) |
192 | runtime->avail_max = avail; | |
f0061c18 | 193 | if (runtime->state == SNDRV_PCM_STATE_DRAINING) { |
4cdc115f | 194 | if (avail >= runtime->buffer_size) { |
1da177e4 | 195 | snd_pcm_drain_done(substream); |
4cdc115f TI |
196 | return -EPIPE; |
197 | } | |
198 | } else { | |
199 | if (avail >= runtime->stop_threshold) { | |
9cd641ed | 200 | __snd_pcm_xrun(substream); |
4cdc115f TI |
201 | return -EPIPE; |
202 | } | |
1da177e4 | 203 | } |
5daeba34 DD |
204 | if (runtime->twake) { |
205 | if (avail >= runtime->twake) | |
206 | wake_up(&runtime->tsleep); | |
207 | } else if (avail >= runtime->control->avail_min) | |
208 | wake_up(&runtime->sleep); | |
1da177e4 LT |
209 | return 0; |
210 | } | |
211 | ||
3179f620 | 212 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
fcae40c9 BW |
213 | struct timespec64 *curr_tstamp, |
214 | struct timespec64 *audio_tstamp) | |
3179f620 PLB |
215 | { |
216 | struct snd_pcm_runtime *runtime = substream->runtime; | |
217 | u64 audio_frames, audio_nsecs; | |
fcae40c9 | 218 | struct timespec64 driver_tstamp; |
3179f620 PLB |
219 | |
220 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
221 | return; | |
222 | ||
223 | if (!(substream->ops->get_time_info) || | |
224 | (runtime->audio_tstamp_report.actual_type == | |
225 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
226 | ||
227 | /* | |
228 | * provide audio timestamp derived from pointer position | |
229 | * add delay only if requested | |
230 | */ | |
231 | ||
232 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
233 | ||
234 | if (runtime->audio_tstamp_config.report_delay) { | |
235 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
236 | audio_frames -= runtime->delay; | |
237 | else | |
238 | audio_frames += runtime->delay; | |
239 | } | |
240 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
241 | runtime->rate); | |
fcae40c9 | 242 | *audio_tstamp = ns_to_timespec64(audio_nsecs); |
3179f620 | 243 | } |
fcae40c9 BW |
244 | |
245 | if (runtime->status->audio_tstamp.tv_sec != audio_tstamp->tv_sec || | |
246 | runtime->status->audio_tstamp.tv_nsec != audio_tstamp->tv_nsec) { | |
80fe7430 AB |
247 | runtime->status->audio_tstamp.tv_sec = audio_tstamp->tv_sec; |
248 | runtime->status->audio_tstamp.tv_nsec = audio_tstamp->tv_nsec; | |
249 | runtime->status->tstamp.tv_sec = curr_tstamp->tv_sec; | |
250 | runtime->status->tstamp.tv_nsec = curr_tstamp->tv_nsec; | |
20e3f985 | 251 | } |
3179f620 | 252 | |
fcae40c9 | 253 | |
3179f620 PLB |
254 | /* |
255 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
256 | * read by low-level hardware was provided with a delay | |
257 | */ | |
fcae40c9 | 258 | snd_pcm_gettime(substream->runtime, &driver_tstamp); |
3179f620 PLB |
259 | runtime->driver_tstamp = driver_tstamp; |
260 | } | |
261 | ||
f240406b JK |
262 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
263 | unsigned int in_interrupt) | |
1da177e4 | 264 | { |
877211f5 | 265 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 266 | snd_pcm_uframes_t pos; |
f240406b | 267 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
268 | snd_pcm_sframes_t hdelta, delta; |
269 | unsigned long jdelta; | |
3509a03f | 270 | unsigned long curr_jiffies; |
fcae40c9 BW |
271 | struct timespec64 curr_tstamp; |
272 | struct timespec64 audio_tstamp; | |
0e8014d7 | 273 | int crossed_boundary = 0; |
1da177e4 | 274 | |
bbf6ad13 | 275 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
276 | |
277 | /* | |
278 | * group pointer, time and jiffies reads to allow for more | |
279 | * accurate correlations/corrections. | |
280 | * The values are stored at the end of this routine after | |
281 | * corrections for hw_ptr position | |
282 | */ | |
f240406b | 283 | pos = substream->ops->pointer(substream); |
3509a03f | 284 | curr_jiffies = jiffies; |
4eeaaeae | 285 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
286 | if ((substream->ops->get_time_info) && |
287 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
288 | substream->ops->get_time_info(substream, &curr_tstamp, | |
289 | &audio_tstamp, | |
290 | &runtime->audio_tstamp_config, | |
291 | &runtime->audio_tstamp_report); | |
292 | ||
293 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
294 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
fcae40c9 | 295 | snd_pcm_gettime(runtime, &curr_tstamp); |
3179f620 | 296 | } else |
fcae40c9 | 297 | snd_pcm_gettime(runtime, &curr_tstamp); |
4eeaaeae PLB |
298 | } |
299 | ||
1da177e4 | 300 | if (pos == SNDRV_PCM_POS_XRUN) { |
9cd641ed | 301 | __snd_pcm_xrun(substream); |
1da177e4 LT |
302 | return -EPIPE; |
303 | } | |
f240406b | 304 | if (pos >= runtime->buffer_size) { |
09e56df8 | 305 | if (printk_ratelimit()) { |
f240406b | 306 | char name[16]; |
acb03d44 | 307 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 308 | pcm_err(substream->pcm, |
0ab1ace8 | 309 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
310 | name, pos, runtime->buffer_size, |
311 | runtime->period_size); | |
f240406b JK |
312 | } |
313 | pos = 0; | |
cedb8118 | 314 | } |
f240406b | 315 | pos -= pos % runtime->min_align; |
f5914908 | 316 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
317 | hw_base = runtime->hw_ptr_base; |
318 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
319 | if (in_interrupt) { |
320 | /* we know that one period was processed */ | |
321 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 322 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 323 | if (delta > new_hw_ptr) { |
bd76af0f | 324 | /* check for double acknowledged interrupts */ |
3509a03f | 325 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 326 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 327 | hw_base += runtime->buffer_size; |
0e8014d7 | 328 | if (hw_base >= runtime->boundary) { |
bd76af0f | 329 | hw_base = 0; |
0e8014d7 PLB |
330 | crossed_boundary++; |
331 | } | |
bd76af0f JK |
332 | new_hw_ptr = hw_base + pos; |
333 | goto __delta; | |
334 | } | |
1da177e4 | 335 | } |
1da177e4 | 336 | } |
f240406b JK |
337 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
338 | /* pointer crosses the end of the ring buffer */ | |
339 | if (new_hw_ptr < old_hw_ptr) { | |
340 | hw_base += runtime->buffer_size; | |
0e8014d7 | 341 | if (hw_base >= runtime->boundary) { |
f240406b | 342 | hw_base = 0; |
0e8014d7 PLB |
343 | crossed_boundary++; |
344 | } | |
f240406b JK |
345 | new_hw_ptr = hw_base + pos; |
346 | } | |
347 | __delta: | |
b406e610 CL |
348 | delta = new_hw_ptr - old_hw_ptr; |
349 | if (delta < 0) | |
350 | delta += runtime->boundary; | |
ab69a490 | 351 | |
59ff878f | 352 | if (runtime->no_period_wakeup) { |
12ff414e | 353 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
354 | /* |
355 | * Without regular period interrupts, we have to check | |
356 | * the elapsed time to detect xruns. | |
357 | */ | |
3509a03f | 358 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
359 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
360 | goto no_delta_check; | |
59ff878f | 361 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
362 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
363 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
364 | delta += runtime->buffer_size; |
365 | hw_base += runtime->buffer_size; | |
0e8014d7 | 366 | if (hw_base >= runtime->boundary) { |
59ff878f | 367 | hw_base = 0; |
0e8014d7 PLB |
368 | crossed_boundary++; |
369 | } | |
59ff878f CL |
370 | new_hw_ptr = hw_base + pos; |
371 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
372 | } | |
ab69a490 | 373 | goto no_delta_check; |
59ff878f | 374 | } |
ab69a490 | 375 | |
f240406b | 376 | /* something must be really wrong */ |
7b3a177b | 377 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
378 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
379 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
380 | substream->stream, (long)pos, | |
381 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
382 | return 0; |
383 | } | |
c87d9732 TI |
384 | |
385 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 386 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
387 | goto no_jiffies_check; |
388 | ||
3e5b5016 TI |
389 | /* Skip the jiffies check for hardwares with BATCH flag. |
390 | * Such hardware usually just increases the position at each IRQ, | |
391 | * thus it can't give any strange position. | |
392 | */ | |
393 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
394 | goto no_jiffies_check; | |
f240406b | 395 | hdelta = delta; |
a4444da3 JK |
396 | if (hdelta < runtime->delay) |
397 | goto no_jiffies_check; | |
398 | hdelta -= runtime->delay; | |
3509a03f | 399 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
400 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
401 | delta = jdelta / | |
402 | (((runtime->period_size * HZ) / runtime->rate) | |
403 | + HZ/100); | |
f240406b JK |
404 | /* move new_hw_ptr according jiffies not pos variable */ |
405 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 406 | hw_base = delta; |
f240406b JK |
407 | /* use loop to avoid checks for delta overflows */ |
408 | /* the delta value is small or zero in most cases */ | |
409 | while (delta > 0) { | |
410 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 411 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 412 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
413 | crossed_boundary--; |
414 | } | |
f240406b JK |
415 | delta--; |
416 | } | |
417 | /* align hw_base to buffer_size */ | |
f5914908 TI |
418 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
419 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
420 | (long)pos, (long)hdelta, |
421 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 422 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
423 | (unsigned long)old_hw_ptr, |
424 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
425 | /* reset values to proper state */ |
426 | delta = 0; | |
427 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 428 | } |
3e5b5016 | 429 | no_jiffies_check: |
bbf6ad13 | 430 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
431 | hw_ptr_error(substream, in_interrupt, |
432 | "Lost interrupts?", | |
433 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 434 | substream->stream, (long)delta, |
f240406b JK |
435 | (long)new_hw_ptr, |
436 | (long)old_hw_ptr); | |
ed3da3d9 | 437 | } |
f240406b | 438 | |
ab69a490 | 439 | no_delta_check: |
3179f620 | 440 | if (runtime->status->hw_ptr == new_hw_ptr) { |
e7513c57 | 441 | runtime->hw_ptr_jiffies = curr_jiffies; |
3179f620 | 442 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
f240406b | 443 | return 0; |
3179f620 | 444 | } |
ab1863fc | 445 | |
d7f5dd97 JK |
446 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
447 | runtime->silence_size > 0) | |
448 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
449 | ||
e7636925 | 450 | if (in_interrupt) { |
ead4046b CL |
451 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
452 | if (delta < 0) | |
453 | delta += runtime->boundary; | |
454 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
455 | runtime->hw_ptr_interrupt += delta; | |
456 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
457 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 458 | } |
ed3da3d9 | 459 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 460 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 461 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
462 | if (crossed_boundary) { |
463 | snd_BUG_ON(crossed_boundary != 1); | |
464 | runtime->hw_ptr_wrap += runtime->boundary; | |
465 | } | |
4eeaaeae | 466 | |
3179f620 | 467 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 468 | |
1250932e | 469 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
470 | } |
471 | ||
472 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 473 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 474 | { |
f240406b | 475 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
476 | } |
477 | ||
478 | /** | |
479 | * snd_pcm_set_ops - set the PCM operators | |
480 | * @pcm: the pcm instance | |
481 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
482 | * @ops: the operator table | |
483 | * | |
484 | * Sets the given PCM operators to the pcm instance. | |
485 | */ | |
e6c2e7eb LPC |
486 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
487 | const struct snd_pcm_ops *ops) | |
1da177e4 | 488 | { |
877211f5 TI |
489 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
490 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
491 | |
492 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
493 | substream->ops = ops; | |
494 | } | |
e88e8ae6 | 495 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
496 | |
497 | /** | |
f7b6603c | 498 | * snd_pcm_set_sync - set the PCM sync id |
1da177e4 LT |
499 | * @substream: the pcm substream |
500 | * | |
501 | * Sets the PCM sync identifier for the card. | |
502 | */ | |
877211f5 | 503 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 504 | { |
877211f5 | 505 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
506 | |
507 | runtime->sync.id32[0] = substream->pcm->card->number; | |
508 | runtime->sync.id32[1] = -1; | |
509 | runtime->sync.id32[2] = -1; | |
510 | runtime->sync.id32[3] = -1; | |
511 | } | |
e88e8ae6 TI |
512 | EXPORT_SYMBOL(snd_pcm_set_sync); |
513 | ||
1da177e4 LT |
514 | /* |
515 | * Standard ioctl routine | |
516 | */ | |
517 | ||
1da177e4 LT |
518 | static inline unsigned int div32(unsigned int a, unsigned int b, |
519 | unsigned int *r) | |
520 | { | |
521 | if (b == 0) { | |
522 | *r = 0; | |
523 | return UINT_MAX; | |
524 | } | |
525 | *r = a % b; | |
526 | return a / b; | |
527 | } | |
528 | ||
529 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
530 | { | |
531 | if (b == 0) | |
532 | return UINT_MAX; | |
533 | return a / b; | |
534 | } | |
535 | ||
536 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
537 | { | |
538 | unsigned int r; | |
539 | unsigned int q; | |
540 | if (b == 0) | |
541 | return UINT_MAX; | |
542 | q = div32(a, b, &r); | |
543 | if (r) | |
544 | ++q; | |
545 | return q; | |
546 | } | |
547 | ||
548 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
549 | { | |
550 | if (a == 0) | |
551 | return 0; | |
552 | if (div_down(UINT_MAX, a) < b) | |
553 | return UINT_MAX; | |
554 | return a * b; | |
555 | } | |
556 | ||
557 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
558 | unsigned int c, unsigned int *r) | |
559 | { | |
560 | u_int64_t n = (u_int64_t) a * b; | |
561 | if (c == 0) { | |
1da177e4 LT |
562 | *r = 0; |
563 | return UINT_MAX; | |
564 | } | |
3f7440a6 | 565 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
566 | if (n >= UINT_MAX) { |
567 | *r = 0; | |
568 | return UINT_MAX; | |
569 | } | |
570 | return n; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | /** |
574 | * snd_interval_refine - refine the interval value of configurator | |
575 | * @i: the interval value to refine | |
576 | * @v: the interval value to refer to | |
577 | * | |
578 | * Refines the interval value with the reference value. | |
579 | * The interval is changed to the range satisfying both intervals. | |
580 | * The interval status (min, max, integer, etc.) are evaluated. | |
581 | * | |
eb7c06e8 YB |
582 | * Return: Positive if the value is changed, zero if it's not changed, or a |
583 | * negative error code. | |
1da177e4 | 584 | */ |
877211f5 | 585 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
586 | { |
587 | int changed = 0; | |
7eaa943c TI |
588 | if (snd_BUG_ON(snd_interval_empty(i))) |
589 | return -EINVAL; | |
1da177e4 LT |
590 | if (i->min < v->min) { |
591 | i->min = v->min; | |
592 | i->openmin = v->openmin; | |
593 | changed = 1; | |
594 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
595 | i->openmin = 1; | |
596 | changed = 1; | |
597 | } | |
598 | if (i->max > v->max) { | |
599 | i->max = v->max; | |
600 | i->openmax = v->openmax; | |
601 | changed = 1; | |
602 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
603 | i->openmax = 1; | |
604 | changed = 1; | |
605 | } | |
606 | if (!i->integer && v->integer) { | |
607 | i->integer = 1; | |
608 | changed = 1; | |
609 | } | |
610 | if (i->integer) { | |
611 | if (i->openmin) { | |
612 | i->min++; | |
613 | i->openmin = 0; | |
614 | } | |
615 | if (i->openmax) { | |
616 | i->max--; | |
617 | i->openmax = 0; | |
618 | } | |
619 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
620 | i->integer = 1; | |
621 | if (snd_interval_checkempty(i)) { | |
622 | snd_interval_none(i); | |
623 | return -EINVAL; | |
624 | } | |
625 | return changed; | |
626 | } | |
e88e8ae6 TI |
627 | EXPORT_SYMBOL(snd_interval_refine); |
628 | ||
877211f5 | 629 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 630 | { |
ff2d6acd TW |
631 | const unsigned int last_max = i->max; |
632 | ||
7eaa943c TI |
633 | if (snd_BUG_ON(snd_interval_empty(i))) |
634 | return -EINVAL; | |
1da177e4 LT |
635 | if (snd_interval_single(i)) |
636 | return 0; | |
637 | i->max = i->min; | |
ff2d6acd | 638 | if (i->openmin) |
1da177e4 | 639 | i->max++; |
ff2d6acd TW |
640 | /* only exclude max value if also excluded before refine */ |
641 | i->openmax = (i->openmax && i->max >= last_max); | |
1da177e4 LT |
642 | return 1; |
643 | } | |
644 | ||
877211f5 | 645 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 646 | { |
ff2d6acd TW |
647 | const unsigned int last_min = i->min; |
648 | ||
7eaa943c TI |
649 | if (snd_BUG_ON(snd_interval_empty(i))) |
650 | return -EINVAL; | |
1da177e4 LT |
651 | if (snd_interval_single(i)) |
652 | return 0; | |
653 | i->min = i->max; | |
ff2d6acd | 654 | if (i->openmax) |
1da177e4 | 655 | i->min--; |
ff2d6acd TW |
656 | /* only exclude min value if also excluded before refine */ |
657 | i->openmin = (i->openmin && i->min <= last_min); | |
1da177e4 LT |
658 | return 1; |
659 | } | |
660 | ||
877211f5 | 661 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
662 | { |
663 | if (a->empty || b->empty) { | |
664 | snd_interval_none(c); | |
665 | return; | |
666 | } | |
667 | c->empty = 0; | |
668 | c->min = mul(a->min, b->min); | |
669 | c->openmin = (a->openmin || b->openmin); | |
670 | c->max = mul(a->max, b->max); | |
671 | c->openmax = (a->openmax || b->openmax); | |
672 | c->integer = (a->integer && b->integer); | |
673 | } | |
674 | ||
675 | /** | |
676 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
677 | * @a: dividend |
678 | * @b: divisor | |
679 | * @c: quotient | |
1da177e4 LT |
680 | * |
681 | * c = a / b | |
682 | * | |
683 | * Returns non-zero if the value is changed, zero if not changed. | |
684 | */ | |
877211f5 | 685 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
686 | { |
687 | unsigned int r; | |
688 | if (a->empty || b->empty) { | |
689 | snd_interval_none(c); | |
690 | return; | |
691 | } | |
692 | c->empty = 0; | |
693 | c->min = div32(a->min, b->max, &r); | |
694 | c->openmin = (r || a->openmin || b->openmax); | |
695 | if (b->min > 0) { | |
696 | c->max = div32(a->max, b->min, &r); | |
697 | if (r) { | |
698 | c->max++; | |
699 | c->openmax = 1; | |
700 | } else | |
701 | c->openmax = (a->openmax || b->openmin); | |
702 | } else { | |
703 | c->max = UINT_MAX; | |
704 | c->openmax = 0; | |
705 | } | |
706 | c->integer = 0; | |
707 | } | |
708 | ||
709 | /** | |
710 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
711 | * @a: dividend 1 |
712 | * @b: dividend 2 | |
713 | * @k: divisor (as integer) | |
714 | * @c: result | |
715 | * | |
1da177e4 LT |
716 | * c = a * b / k |
717 | * | |
718 | * Returns non-zero if the value is changed, zero if not changed. | |
719 | */ | |
877211f5 TI |
720 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
721 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
722 | { |
723 | unsigned int r; | |
724 | if (a->empty || b->empty) { | |
725 | snd_interval_none(c); | |
726 | return; | |
727 | } | |
728 | c->empty = 0; | |
729 | c->min = muldiv32(a->min, b->min, k, &r); | |
730 | c->openmin = (r || a->openmin || b->openmin); | |
731 | c->max = muldiv32(a->max, b->max, k, &r); | |
732 | if (r) { | |
733 | c->max++; | |
734 | c->openmax = 1; | |
735 | } else | |
736 | c->openmax = (a->openmax || b->openmax); | |
737 | c->integer = 0; | |
738 | } | |
739 | ||
740 | /** | |
741 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
742 | * @a: dividend 1 |
743 | * @k: dividend 2 (as integer) | |
744 | * @b: divisor | |
745 | * @c: result | |
1da177e4 LT |
746 | * |
747 | * c = a * k / b | |
748 | * | |
749 | * Returns non-zero if the value is changed, zero if not changed. | |
750 | */ | |
877211f5 TI |
751 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
752 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
753 | { |
754 | unsigned int r; | |
755 | if (a->empty || b->empty) { | |
756 | snd_interval_none(c); | |
757 | return; | |
758 | } | |
759 | c->empty = 0; | |
760 | c->min = muldiv32(a->min, k, b->max, &r); | |
761 | c->openmin = (r || a->openmin || b->openmax); | |
762 | if (b->min > 0) { | |
763 | c->max = muldiv32(a->max, k, b->min, &r); | |
764 | if (r) { | |
765 | c->max++; | |
766 | c->openmax = 1; | |
767 | } else | |
768 | c->openmax = (a->openmax || b->openmin); | |
769 | } else { | |
770 | c->max = UINT_MAX; | |
771 | c->openmax = 0; | |
772 | } | |
773 | c->integer = 0; | |
774 | } | |
775 | ||
1da177e4 LT |
776 | /* ---- */ |
777 | ||
778 | ||
779 | /** | |
780 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
781 | * @i: interval to refine |
782 | * @rats_count: number of ratnum_t | |
783 | * @rats: ratnum_t array | |
784 | * @nump: pointer to store the resultant numerator | |
785 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 786 | * |
eb7c06e8 YB |
787 | * Return: Positive if the value is changed, zero if it's not changed, or a |
788 | * negative error code. | |
1da177e4 | 789 | */ |
877211f5 | 790 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 791 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 792 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 793 | { |
8374e24c KH |
794 | unsigned int best_num, best_den; |
795 | int best_diff; | |
1da177e4 | 796 | unsigned int k; |
877211f5 | 797 | struct snd_interval t; |
1da177e4 | 798 | int err; |
8374e24c KH |
799 | unsigned int result_num, result_den; |
800 | int result_diff; | |
1da177e4 LT |
801 | |
802 | best_num = best_den = best_diff = 0; | |
803 | for (k = 0; k < rats_count; ++k) { | |
804 | unsigned int num = rats[k].num; | |
805 | unsigned int den; | |
806 | unsigned int q = i->min; | |
807 | int diff; | |
808 | if (q == 0) | |
809 | q = 1; | |
40962d7c | 810 | den = div_up(num, q); |
1da177e4 LT |
811 | if (den < rats[k].den_min) |
812 | continue; | |
813 | if (den > rats[k].den_max) | |
814 | den = rats[k].den_max; | |
815 | else { | |
816 | unsigned int r; | |
817 | r = (den - rats[k].den_min) % rats[k].den_step; | |
818 | if (r != 0) | |
819 | den -= r; | |
820 | } | |
821 | diff = num - q * den; | |
8374e24c KH |
822 | if (diff < 0) |
823 | diff = -diff; | |
1da177e4 LT |
824 | if (best_num == 0 || |
825 | diff * best_den < best_diff * den) { | |
826 | best_diff = diff; | |
827 | best_den = den; | |
828 | best_num = num; | |
829 | } | |
830 | } | |
831 | if (best_den == 0) { | |
832 | i->empty = 1; | |
833 | return -EINVAL; | |
834 | } | |
835 | t.min = div_down(best_num, best_den); | |
836 | t.openmin = !!(best_num % best_den); | |
837 | ||
8374e24c KH |
838 | result_num = best_num; |
839 | result_diff = best_diff; | |
840 | result_den = best_den; | |
1da177e4 LT |
841 | best_num = best_den = best_diff = 0; |
842 | for (k = 0; k < rats_count; ++k) { | |
843 | unsigned int num = rats[k].num; | |
844 | unsigned int den; | |
845 | unsigned int q = i->max; | |
846 | int diff; | |
847 | if (q == 0) { | |
848 | i->empty = 1; | |
849 | return -EINVAL; | |
850 | } | |
40962d7c | 851 | den = div_down(num, q); |
1da177e4 LT |
852 | if (den > rats[k].den_max) |
853 | continue; | |
854 | if (den < rats[k].den_min) | |
855 | den = rats[k].den_min; | |
856 | else { | |
857 | unsigned int r; | |
858 | r = (den - rats[k].den_min) % rats[k].den_step; | |
859 | if (r != 0) | |
860 | den += rats[k].den_step - r; | |
861 | } | |
862 | diff = q * den - num; | |
8374e24c KH |
863 | if (diff < 0) |
864 | diff = -diff; | |
1da177e4 LT |
865 | if (best_num == 0 || |
866 | diff * best_den < best_diff * den) { | |
867 | best_diff = diff; | |
868 | best_den = den; | |
869 | best_num = num; | |
870 | } | |
871 | } | |
872 | if (best_den == 0) { | |
873 | i->empty = 1; | |
874 | return -EINVAL; | |
875 | } | |
876 | t.max = div_up(best_num, best_den); | |
877 | t.openmax = !!(best_num % best_den); | |
878 | t.integer = 0; | |
879 | err = snd_interval_refine(i, &t); | |
880 | if (err < 0) | |
881 | return err; | |
882 | ||
883 | if (snd_interval_single(i)) { | |
8374e24c KH |
884 | if (best_diff * result_den < result_diff * best_den) { |
885 | result_num = best_num; | |
886 | result_den = best_den; | |
887 | } | |
1da177e4 | 888 | if (nump) |
8374e24c | 889 | *nump = result_num; |
1da177e4 | 890 | if (denp) |
8374e24c | 891 | *denp = result_den; |
1da177e4 LT |
892 | } |
893 | return err; | |
894 | } | |
e88e8ae6 TI |
895 | EXPORT_SYMBOL(snd_interval_ratnum); |
896 | ||
1da177e4 LT |
897 | /** |
898 | * snd_interval_ratden - refine the interval value | |
df8db936 | 899 | * @i: interval to refine |
877211f5 TI |
900 | * @rats_count: number of struct ratden |
901 | * @rats: struct ratden array | |
df8db936 TI |
902 | * @nump: pointer to store the resultant numerator |
903 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 904 | * |
eb7c06e8 YB |
905 | * Return: Positive if the value is changed, zero if it's not changed, or a |
906 | * negative error code. | |
1da177e4 | 907 | */ |
877211f5 | 908 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
909 | unsigned int rats_count, |
910 | const struct snd_ratden *rats, | |
1da177e4 LT |
911 | unsigned int *nump, unsigned int *denp) |
912 | { | |
913 | unsigned int best_num, best_diff, best_den; | |
914 | unsigned int k; | |
877211f5 | 915 | struct snd_interval t; |
1da177e4 LT |
916 | int err; |
917 | ||
918 | best_num = best_den = best_diff = 0; | |
919 | for (k = 0; k < rats_count; ++k) { | |
920 | unsigned int num; | |
921 | unsigned int den = rats[k].den; | |
922 | unsigned int q = i->min; | |
923 | int diff; | |
924 | num = mul(q, den); | |
925 | if (num > rats[k].num_max) | |
926 | continue; | |
927 | if (num < rats[k].num_min) | |
928 | num = rats[k].num_max; | |
929 | else { | |
930 | unsigned int r; | |
931 | r = (num - rats[k].num_min) % rats[k].num_step; | |
932 | if (r != 0) | |
933 | num += rats[k].num_step - r; | |
934 | } | |
935 | diff = num - q * den; | |
936 | if (best_num == 0 || | |
937 | diff * best_den < best_diff * den) { | |
938 | best_diff = diff; | |
939 | best_den = den; | |
940 | best_num = num; | |
941 | } | |
942 | } | |
943 | if (best_den == 0) { | |
944 | i->empty = 1; | |
945 | return -EINVAL; | |
946 | } | |
947 | t.min = div_down(best_num, best_den); | |
948 | t.openmin = !!(best_num % best_den); | |
949 | ||
950 | best_num = best_den = best_diff = 0; | |
951 | for (k = 0; k < rats_count; ++k) { | |
952 | unsigned int num; | |
953 | unsigned int den = rats[k].den; | |
954 | unsigned int q = i->max; | |
955 | int diff; | |
956 | num = mul(q, den); | |
957 | if (num < rats[k].num_min) | |
958 | continue; | |
959 | if (num > rats[k].num_max) | |
960 | num = rats[k].num_max; | |
961 | else { | |
962 | unsigned int r; | |
963 | r = (num - rats[k].num_min) % rats[k].num_step; | |
964 | if (r != 0) | |
965 | num -= r; | |
966 | } | |
967 | diff = q * den - num; | |
968 | if (best_num == 0 || | |
969 | diff * best_den < best_diff * den) { | |
970 | best_diff = diff; | |
971 | best_den = den; | |
972 | best_num = num; | |
973 | } | |
974 | } | |
975 | if (best_den == 0) { | |
976 | i->empty = 1; | |
977 | return -EINVAL; | |
978 | } | |
979 | t.max = div_up(best_num, best_den); | |
980 | t.openmax = !!(best_num % best_den); | |
981 | t.integer = 0; | |
982 | err = snd_interval_refine(i, &t); | |
983 | if (err < 0) | |
984 | return err; | |
985 | ||
986 | if (snd_interval_single(i)) { | |
987 | if (nump) | |
988 | *nump = best_num; | |
989 | if (denp) | |
990 | *denp = best_den; | |
991 | } | |
992 | return err; | |
993 | } | |
994 | ||
995 | /** | |
996 | * snd_interval_list - refine the interval value from the list | |
997 | * @i: the interval value to refine | |
998 | * @count: the number of elements in the list | |
999 | * @list: the value list | |
1000 | * @mask: the bit-mask to evaluate | |
1001 | * | |
1002 | * Refines the interval value from the list. | |
1003 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1004 | * evaluated. | |
1005 | * | |
eb7c06e8 YB |
1006 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1007 | * negative error code. | |
1da177e4 | 1008 | */ |
4af87a93 MB |
1009 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1010 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1011 | { |
1012 | unsigned int k; | |
b1ddaf68 | 1013 | struct snd_interval list_range; |
0981a260 TI |
1014 | |
1015 | if (!count) { | |
1016 | i->empty = 1; | |
1017 | return -EINVAL; | |
1018 | } | |
b1ddaf68 CL |
1019 | snd_interval_any(&list_range); |
1020 | list_range.min = UINT_MAX; | |
1021 | list_range.max = 0; | |
1da177e4 LT |
1022 | for (k = 0; k < count; k++) { |
1023 | if (mask && !(mask & (1 << k))) | |
1024 | continue; | |
b1ddaf68 | 1025 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1026 | continue; |
b1ddaf68 CL |
1027 | list_range.min = min(list_range.min, list[k]); |
1028 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1029 | } |
b1ddaf68 | 1030 | return snd_interval_refine(i, &list_range); |
1da177e4 | 1031 | } |
e88e8ae6 TI |
1032 | EXPORT_SYMBOL(snd_interval_list); |
1033 | ||
f66f898e PR |
1034 | /** |
1035 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1036 | * @i: the interval value to refine | |
1037 | * @count: the number of elements in the list of ranges | |
1038 | * @ranges: the ranges list | |
1039 | * @mask: the bit-mask to evaluate | |
1040 | * | |
1041 | * Refines the interval value from the list of ranges. | |
1042 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1043 | * evaluated. | |
1044 | * | |
1045 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1046 | * negative error code. | |
1047 | */ | |
1048 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1049 | const struct snd_interval *ranges, unsigned int mask) | |
1050 | { | |
1051 | unsigned int k; | |
1052 | struct snd_interval range_union; | |
1053 | struct snd_interval range; | |
1054 | ||
1055 | if (!count) { | |
1056 | snd_interval_none(i); | |
1057 | return -EINVAL; | |
1058 | } | |
1059 | snd_interval_any(&range_union); | |
1060 | range_union.min = UINT_MAX; | |
1061 | range_union.max = 0; | |
1062 | for (k = 0; k < count; k++) { | |
1063 | if (mask && !(mask & (1 << k))) | |
1064 | continue; | |
1065 | snd_interval_copy(&range, &ranges[k]); | |
1066 | if (snd_interval_refine(&range, i) < 0) | |
1067 | continue; | |
1068 | if (snd_interval_empty(&range)) | |
1069 | continue; | |
1070 | ||
1071 | if (range.min < range_union.min) { | |
1072 | range_union.min = range.min; | |
1073 | range_union.openmin = 1; | |
1074 | } | |
1075 | if (range.min == range_union.min && !range.openmin) | |
1076 | range_union.openmin = 0; | |
1077 | if (range.max > range_union.max) { | |
1078 | range_union.max = range.max; | |
1079 | range_union.openmax = 1; | |
1080 | } | |
1081 | if (range.max == range_union.max && !range.openmax) | |
1082 | range_union.openmax = 0; | |
1083 | } | |
1084 | return snd_interval_refine(i, &range_union); | |
1085 | } | |
1086 | EXPORT_SYMBOL(snd_interval_ranges); | |
1087 | ||
0f519b62 | 1088 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1089 | { |
1090 | unsigned int n; | |
1091 | int changed = 0; | |
0f519b62 | 1092 | n = i->min % step; |
1da177e4 LT |
1093 | if (n != 0 || i->openmin) { |
1094 | i->min += step - n; | |
df1e4719 | 1095 | i->openmin = 0; |
1da177e4 LT |
1096 | changed = 1; |
1097 | } | |
0f519b62 | 1098 | n = i->max % step; |
1da177e4 LT |
1099 | if (n != 0 || i->openmax) { |
1100 | i->max -= n; | |
df1e4719 | 1101 | i->openmax = 0; |
1da177e4 LT |
1102 | changed = 1; |
1103 | } | |
1104 | if (snd_interval_checkempty(i)) { | |
1105 | i->empty = 1; | |
1106 | return -EINVAL; | |
1107 | } | |
1108 | return changed; | |
1109 | } | |
1110 | ||
1111 | /* Info constraints helpers */ | |
1112 | ||
1113 | /** | |
1114 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1115 | * @runtime: the pcm runtime instance | |
1116 | * @cond: condition bits | |
1117 | * @var: the variable to evaluate | |
1118 | * @func: the evaluation function | |
1119 | * @private: the private data pointer passed to function | |
1120 | * @dep: the dependent variables | |
1121 | * | |
eb7c06e8 | 1122 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1123 | */ |
877211f5 | 1124 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1125 | int var, |
1126 | snd_pcm_hw_rule_func_t func, void *private, | |
1127 | int dep, ...) | |
1128 | { | |
877211f5 TI |
1129 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1130 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1131 | unsigned int k; |
1132 | va_list args; | |
1133 | va_start(args, dep); | |
1134 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1135 | struct snd_pcm_hw_rule *new; |
1da177e4 | 1136 | unsigned int new_rules = constrs->rules_all + 16; |
64f0bd11 BG |
1137 | new = krealloc_array(constrs->rules, new_rules, |
1138 | sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1139 | if (!new) { |
1140 | va_end(args); | |
1da177e4 | 1141 | return -ENOMEM; |
87a1c8aa | 1142 | } |
1da177e4 LT |
1143 | constrs->rules = new; |
1144 | constrs->rules_all = new_rules; | |
1145 | } | |
1146 | c = &constrs->rules[constrs->rules_num]; | |
1147 | c->cond = cond; | |
1148 | c->func = func; | |
1149 | c->var = var; | |
1150 | c->private = private; | |
1151 | k = 0; | |
1152 | while (1) { | |
87a1c8aa JJ |
1153 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1154 | va_end(args); | |
7eaa943c | 1155 | return -EINVAL; |
87a1c8aa | 1156 | } |
1da177e4 LT |
1157 | c->deps[k++] = dep; |
1158 | if (dep < 0) | |
1159 | break; | |
1160 | dep = va_arg(args, int); | |
1161 | } | |
1162 | constrs->rules_num++; | |
1163 | va_end(args); | |
1164 | return 0; | |
87a1c8aa | 1165 | } |
e88e8ae6 TI |
1166 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1167 | ||
1da177e4 | 1168 | /** |
1c85cc64 | 1169 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1170 | * @runtime: PCM runtime instance |
1171 | * @var: hw_params variable to apply the mask | |
1172 | * @mask: the bitmap mask | |
1173 | * | |
1c85cc64 | 1174 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1175 | * |
1176 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1177 | */ |
877211f5 | 1178 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1179 | u_int32_t mask) |
1180 | { | |
877211f5 TI |
1181 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1182 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1183 | *maskp->bits &= mask; |
1184 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1185 | if (*maskp->bits == 0) | |
1186 | return -EINVAL; | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | /** | |
1c85cc64 | 1191 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1192 | * @runtime: PCM runtime instance |
1193 | * @var: hw_params variable to apply the mask | |
1194 | * @mask: the 64bit bitmap mask | |
1195 | * | |
1c85cc64 | 1196 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1197 | * |
1198 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1199 | */ |
877211f5 | 1200 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1201 | u_int64_t mask) |
1202 | { | |
877211f5 TI |
1203 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1204 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1205 | maskp->bits[0] &= (u_int32_t)mask; |
1206 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1207 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1208 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1209 | return -EINVAL; | |
1210 | return 0; | |
1211 | } | |
63a5d4c6 | 1212 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1213 | |
1214 | /** | |
1c85cc64 | 1215 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1216 | * @runtime: PCM runtime instance |
1217 | * @var: hw_params variable to apply the integer constraint | |
1218 | * | |
1219 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1220 | * |
1221 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1222 | * negative error code. | |
1da177e4 | 1223 | */ |
877211f5 | 1224 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1225 | { |
877211f5 | 1226 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1227 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1228 | } | |
e88e8ae6 TI |
1229 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1230 | ||
1da177e4 | 1231 | /** |
1c85cc64 | 1232 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1233 | * @runtime: PCM runtime instance |
1234 | * @var: hw_params variable to apply the range | |
1235 | * @min: the minimal value | |
1236 | * @max: the maximal value | |
1237 | * | |
1238 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1239 | * |
1240 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1241 | * negative error code. | |
1da177e4 | 1242 | */ |
877211f5 | 1243 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1244 | unsigned int min, unsigned int max) |
1245 | { | |
877211f5 TI |
1246 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1247 | struct snd_interval t; | |
1da177e4 LT |
1248 | t.min = min; |
1249 | t.max = max; | |
1250 | t.openmin = t.openmax = 0; | |
1251 | t.integer = 0; | |
1252 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1253 | } | |
e88e8ae6 TI |
1254 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1255 | ||
877211f5 TI |
1256 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1257 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1258 | { |
877211f5 | 1259 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1260 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1261 | } | |
1262 | ||
1263 | ||
1264 | /** | |
1c85cc64 | 1265 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1266 | * @runtime: PCM runtime instance |
1267 | * @cond: condition bits | |
1268 | * @var: hw_params variable to apply the list constraint | |
1269 | * @l: list | |
1270 | * | |
1271 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1272 | * |
1273 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1274 | */ |
877211f5 | 1275 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1276 | unsigned int cond, |
1277 | snd_pcm_hw_param_t var, | |
1464189f | 1278 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1279 | { |
1280 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1281 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1282 | var, -1); |
1283 | } | |
e88e8ae6 TI |
1284 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1285 | ||
f66f898e PR |
1286 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1287 | struct snd_pcm_hw_rule *rule) | |
1288 | { | |
1289 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1290 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1291 | r->count, r->ranges, r->mask); | |
1292 | } | |
1293 | ||
1294 | ||
1295 | /** | |
1296 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1297 | * @runtime: PCM runtime instance | |
1298 | * @cond: condition bits | |
1299 | * @var: hw_params variable to apply the list of range constraints | |
1300 | * @r: ranges | |
1301 | * | |
1302 | * Apply the list of range constraints to an interval parameter. | |
1303 | * | |
1304 | * Return: Zero if successful, or a negative error code on failure. | |
1305 | */ | |
1306 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1307 | unsigned int cond, | |
1308 | snd_pcm_hw_param_t var, | |
1309 | const struct snd_pcm_hw_constraint_ranges *r) | |
1310 | { | |
1311 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1312 | snd_pcm_hw_rule_ranges, (void *)r, | |
1313 | var, -1); | |
1314 | } | |
1315 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1316 | ||
877211f5 TI |
1317 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1318 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1319 | { |
e5e113cf | 1320 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1321 | unsigned int num = 0, den = 0; |
1322 | int err; | |
1323 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1324 | r->nrats, r->rats, &num, &den); | |
1325 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1326 | params->rate_num = num; | |
1327 | params->rate_den = den; | |
1328 | } | |
1329 | return err; | |
1330 | } | |
1331 | ||
1332 | /** | |
1c85cc64 | 1333 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1334 | * @runtime: PCM runtime instance |
1335 | * @cond: condition bits | |
1336 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1337 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1338 | * |
1339 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1340 | */ |
877211f5 | 1341 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1342 | unsigned int cond, |
1343 | snd_pcm_hw_param_t var, | |
e5e113cf | 1344 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1345 | { |
1346 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1347 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1348 | var, -1); |
1349 | } | |
e88e8ae6 TI |
1350 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1351 | ||
877211f5 TI |
1352 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1353 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1354 | { |
e5e113cf | 1355 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1356 | unsigned int num = 0, den = 0; |
1357 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1358 | r->nrats, r->rats, &num, &den); | |
1359 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1360 | params->rate_num = num; | |
1361 | params->rate_den = den; | |
1362 | } | |
1363 | return err; | |
1364 | } | |
1365 | ||
1366 | /** | |
1c85cc64 | 1367 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1368 | * @runtime: PCM runtime instance |
1369 | * @cond: condition bits | |
1370 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1371 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1372 | * |
1373 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1374 | */ |
877211f5 | 1375 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1376 | unsigned int cond, |
1377 | snd_pcm_hw_param_t var, | |
e5e113cf | 1378 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1379 | { |
1380 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1381 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1382 | var, -1); |
1383 | } | |
e88e8ae6 TI |
1384 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1385 | ||
877211f5 TI |
1386 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1387 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1388 | { |
1389 | unsigned int l = (unsigned long) rule->private; | |
1390 | int width = l & 0xffff; | |
1391 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1392 | const struct snd_interval *i = |
1393 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1394 | |
1395 | if (!snd_interval_single(i)) | |
1396 | return 0; | |
1397 | ||
1398 | if ((snd_interval_value(i) == width) || | |
1399 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1400 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1401 | |
1da177e4 LT |
1402 | return 0; |
1403 | } | |
1404 | ||
1405 | /** | |
1c85cc64 | 1406 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1407 | * @runtime: PCM runtime instance |
1408 | * @cond: condition bits | |
1409 | * @width: sample bits width | |
1410 | * @msbits: msbits width | |
eb7c06e8 | 1411 | * |
8ef9df55 LPC |
1412 | * This constraint will set the number of most significant bits (msbits) if a |
1413 | * sample format with the specified width has been select. If width is set to 0 | |
1414 | * the msbits will be set for any sample format with a width larger than the | |
1415 | * specified msbits. | |
1416 | * | |
eb7c06e8 | 1417 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1418 | */ |
877211f5 | 1419 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1420 | unsigned int cond, |
1421 | unsigned int width, | |
1422 | unsigned int msbits) | |
1423 | { | |
1424 | unsigned long l = (msbits << 16) | width; | |
1425 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1426 | snd_pcm_hw_rule_msbits, | |
1427 | (void*) l, | |
1428 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1429 | } | |
e88e8ae6 TI |
1430 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1431 | ||
877211f5 TI |
1432 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1433 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1434 | { |
1435 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1436 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1437 | } |
1438 | ||
1439 | /** | |
1c85cc64 | 1440 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1441 | * @runtime: PCM runtime instance |
1442 | * @cond: condition bits | |
1443 | * @var: hw_params variable to apply the step constraint | |
1444 | * @step: step size | |
eb7c06e8 YB |
1445 | * |
1446 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1447 | */ |
877211f5 | 1448 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1449 | unsigned int cond, |
1450 | snd_pcm_hw_param_t var, | |
1451 | unsigned long step) | |
1452 | { | |
1453 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1454 | snd_pcm_hw_rule_step, (void *) step, | |
1455 | var, -1); | |
1456 | } | |
e88e8ae6 TI |
1457 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1458 | ||
877211f5 | 1459 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1460 | { |
d03af9b8 | 1461 | static const unsigned int pow2_sizes[] = { |
1da177e4 LT |
1462 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1463 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1464 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1465 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1466 | }; | |
1467 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1468 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1469 | } | |
1470 | ||
1471 | /** | |
1c85cc64 | 1472 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1473 | * @runtime: PCM runtime instance |
1474 | * @cond: condition bits | |
1475 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1476 | * |
1477 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1478 | */ |
877211f5 | 1479 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1480 | unsigned int cond, |
1481 | snd_pcm_hw_param_t var) | |
1482 | { | |
1483 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1484 | snd_pcm_hw_rule_pow2, NULL, | |
1485 | var, -1); | |
1486 | } | |
e88e8ae6 TI |
1487 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1488 | ||
d5b702a6 CL |
1489 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1490 | struct snd_pcm_hw_rule *rule) | |
1491 | { | |
1492 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1493 | struct snd_interval *rate; | |
1494 | ||
1495 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1496 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1497 | } | |
1498 | ||
1499 | /** | |
1500 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1501 | * @runtime: PCM runtime instance | |
1502 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1503 | * |
1504 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1505 | */ |
1506 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1507 | unsigned int base_rate) | |
1508 | { | |
1509 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1510 | SNDRV_PCM_HW_PARAM_RATE, | |
1511 | snd_pcm_hw_rule_noresample_func, | |
1512 | (void *)(uintptr_t)base_rate, | |
1513 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1514 | } | |
1515 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1516 | ||
877211f5 | 1517 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1518 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1519 | { |
1520 | if (hw_is_mask(var)) { | |
1521 | snd_mask_any(hw_param_mask(params, var)); | |
1522 | params->cmask |= 1 << var; | |
1523 | params->rmask |= 1 << var; | |
1524 | return; | |
1525 | } | |
1526 | if (hw_is_interval(var)) { | |
1527 | snd_interval_any(hw_param_interval(params, var)); | |
1528 | params->cmask |= 1 << var; | |
1529 | params->rmask |= 1 << var; | |
1530 | return; | |
1531 | } | |
1532 | snd_BUG(); | |
1533 | } | |
1534 | ||
877211f5 | 1535 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1536 | { |
1537 | unsigned int k; | |
1538 | memset(params, 0, sizeof(*params)); | |
1539 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1540 | _snd_pcm_hw_param_any(params, k); | |
1541 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1542 | _snd_pcm_hw_param_any(params, k); | |
1543 | params->info = ~0U; | |
1544 | } | |
e88e8ae6 | 1545 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1546 | |
1547 | /** | |
1c85cc64 | 1548 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1549 | * @params: the hw_params instance |
1550 | * @var: parameter to retrieve | |
1c85cc64 | 1551 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1552 | * |
eb7c06e8 YB |
1553 | * Return: The value for field @var if it's fixed in configuration space |
1554 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1555 | */ |
e88e8ae6 TI |
1556 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1557 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1558 | { |
1559 | if (hw_is_mask(var)) { | |
877211f5 | 1560 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1561 | if (!snd_mask_single(mask)) |
1562 | return -EINVAL; | |
1563 | if (dir) | |
1564 | *dir = 0; | |
1565 | return snd_mask_value(mask); | |
1566 | } | |
1567 | if (hw_is_interval(var)) { | |
877211f5 | 1568 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1569 | if (!snd_interval_single(i)) |
1570 | return -EINVAL; | |
1571 | if (dir) | |
1572 | *dir = i->openmin; | |
1573 | return snd_interval_value(i); | |
1574 | } | |
1da177e4 LT |
1575 | return -EINVAL; |
1576 | } | |
e88e8ae6 | 1577 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1578 | |
877211f5 | 1579 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1580 | snd_pcm_hw_param_t var) |
1581 | { | |
1582 | if (hw_is_mask(var)) { | |
1583 | snd_mask_none(hw_param_mask(params, var)); | |
1584 | params->cmask |= 1 << var; | |
1585 | params->rmask |= 1 << var; | |
1586 | } else if (hw_is_interval(var)) { | |
1587 | snd_interval_none(hw_param_interval(params, var)); | |
1588 | params->cmask |= 1 << var; | |
1589 | params->rmask |= 1 << var; | |
1590 | } else { | |
1591 | snd_BUG(); | |
1592 | } | |
1593 | } | |
e88e8ae6 | 1594 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1595 | |
877211f5 | 1596 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1597 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1598 | { |
1599 | int changed; | |
1600 | if (hw_is_mask(var)) | |
1601 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1602 | else if (hw_is_interval(var)) | |
1603 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1604 | else |
1da177e4 | 1605 | return -EINVAL; |
7a0a8716 | 1606 | if (changed > 0) { |
1da177e4 LT |
1607 | params->cmask |= 1 << var; |
1608 | params->rmask |= 1 << var; | |
1609 | } | |
1610 | return changed; | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /** | |
1c85cc64 | 1615 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1616 | * @pcm: PCM instance |
1617 | * @params: the hw_params instance | |
1618 | * @var: parameter to retrieve | |
1c85cc64 | 1619 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1620 | * |
1c85cc64 | 1621 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1622 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1623 | * |
1624 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1625 | */ |
e88e8ae6 TI |
1626 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1627 | struct snd_pcm_hw_params *params, | |
1628 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1629 | { |
1630 | int changed = _snd_pcm_hw_param_first(params, var); | |
1631 | if (changed < 0) | |
1632 | return changed; | |
1633 | if (params->rmask) { | |
1634 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1635 | if (err < 0) |
7eaa943c | 1636 | return err; |
1da177e4 LT |
1637 | } |
1638 | return snd_pcm_hw_param_value(params, var, dir); | |
1639 | } | |
e88e8ae6 TI |
1640 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1641 | ||
877211f5 | 1642 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1643 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1644 | { |
1645 | int changed; | |
1646 | if (hw_is_mask(var)) | |
1647 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1648 | else if (hw_is_interval(var)) | |
1649 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1650 | else |
1da177e4 | 1651 | return -EINVAL; |
7a0a8716 | 1652 | if (changed > 0) { |
1da177e4 LT |
1653 | params->cmask |= 1 << var; |
1654 | params->rmask |= 1 << var; | |
1655 | } | |
1656 | return changed; | |
1657 | } | |
1658 | ||
1659 | ||
1660 | /** | |
1c85cc64 | 1661 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1662 | * @pcm: PCM instance |
1663 | * @params: the hw_params instance | |
1664 | * @var: parameter to retrieve | |
1c85cc64 | 1665 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1666 | * |
1c85cc64 | 1667 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1668 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1669 | * |
1670 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1671 | */ |
e88e8ae6 TI |
1672 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1673 | struct snd_pcm_hw_params *params, | |
1674 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1675 | { |
1676 | int changed = _snd_pcm_hw_param_last(params, var); | |
1677 | if (changed < 0) | |
1678 | return changed; | |
1679 | if (params->rmask) { | |
1680 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1681 | if (err < 0) |
7eaa943c | 1682 | return err; |
1da177e4 LT |
1683 | } |
1684 | return snd_pcm_hw_param_value(params, var, dir); | |
1685 | } | |
e88e8ae6 | 1686 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 | 1687 | |
877211f5 | 1688 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1689 | void *arg) |
1690 | { | |
877211f5 | 1691 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1692 | unsigned long flags; |
1693 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1694 | if (snd_pcm_running(substream) && | |
1695 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1696 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1697 | else { |
1da177e4 | 1698 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1699 | runtime->hw_ptr_wrap = 0; |
1700 | } | |
1da177e4 LT |
1701 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1702 | return 0; | |
1703 | } | |
1704 | ||
877211f5 | 1705 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1706 | void *arg) |
1707 | { | |
877211f5 TI |
1708 | struct snd_pcm_channel_info *info = arg; |
1709 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1710 | int width; |
1711 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1712 | info->offset = -1; | |
1713 | return 0; | |
1714 | } | |
1715 | width = snd_pcm_format_physical_width(runtime->format); | |
1716 | if (width < 0) | |
1717 | return width; | |
1718 | info->offset = 0; | |
1719 | switch (runtime->access) { | |
1720 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1721 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1722 | info->first = info->channel * width; | |
1723 | info->step = runtime->channels * width; | |
1724 | break; | |
1725 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1726 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1727 | { | |
1728 | size_t size = runtime->dma_bytes / runtime->channels; | |
1729 | info->first = info->channel * size * 8; | |
1730 | info->step = width; | |
1731 | break; | |
1732 | } | |
1733 | default: | |
1734 | snd_BUG(); | |
1735 | break; | |
1736 | } | |
1737 | return 0; | |
1738 | } | |
1739 | ||
8bea869c JK |
1740 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1741 | void *arg) | |
1742 | { | |
1743 | struct snd_pcm_hw_params *params = arg; | |
1744 | snd_pcm_format_t format; | |
a9960e6a CL |
1745 | int channels; |
1746 | ssize_t frame_size; | |
8bea869c JK |
1747 | |
1748 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1749 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1750 | format = params_format(params); | |
1751 | channels = params_channels(params); | |
a9960e6a CL |
1752 | frame_size = snd_pcm_format_size(format, channels); |
1753 | if (frame_size > 0) | |
f3eef46f | 1754 | params->fifo_size /= frame_size; |
8bea869c JK |
1755 | } |
1756 | return 0; | |
1757 | } | |
1758 | ||
1da177e4 LT |
1759 | /** |
1760 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1761 | * @substream: the pcm substream instance | |
1762 | * @cmd: ioctl command | |
1763 | * @arg: ioctl argument | |
1764 | * | |
1765 | * Processes the generic ioctl commands for PCM. | |
1766 | * Can be passed as the ioctl callback for PCM ops. | |
1767 | * | |
eb7c06e8 | 1768 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1769 | */ |
877211f5 | 1770 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1771 | unsigned int cmd, void *arg) |
1772 | { | |
1773 | switch (cmd) { | |
1da177e4 LT |
1774 | case SNDRV_PCM_IOCTL1_RESET: |
1775 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1776 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1777 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1778 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1779 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1780 | } |
1781 | return -ENXIO; | |
1782 | } | |
e88e8ae6 TI |
1783 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1784 | ||
1da177e4 | 1785 | /** |
47271b1b TS |
1786 | * snd_pcm_period_elapsed_under_stream_lock() - update the status of runtime for the next period |
1787 | * under acquired lock of PCM substream. | |
1788 | * @substream: the instance of pcm substream. | |
1789 | * | |
1790 | * This function is called when the batch of audio data frames as the same size as the period of | |
1791 | * buffer is already processed in audio data transmission. | |
1792 | * | |
1793 | * The call of function updates the status of runtime with the latest position of audio data | |
1794 | * transmission, checks overrun and underrun over buffer, awaken user processes from waiting for | |
1795 | * available audio data frames, sampling audio timestamp, and performs stop or drain the PCM | |
1796 | * substream according to configured threshold. | |
1797 | * | |
1798 | * The function is intended to use for the case that PCM driver operates audio data frames under | |
1799 | * acquired lock of PCM substream; e.g. in callback of any operation of &snd_pcm_ops in process | |
1800 | * context. In any interrupt context, it's preferrable to use ``snd_pcm_period_elapsed()`` instead | |
1801 | * since lock of PCM substream should be acquired in advance. | |
1da177e4 | 1802 | * |
47271b1b TS |
1803 | * Developer should pay enough attention that some callbacks in &snd_pcm_ops are done by the call of |
1804 | * function: | |
1da177e4 | 1805 | * |
47271b1b TS |
1806 | * - .pointer - to retrieve current position of audio data transmission by frame count or XRUN state. |
1807 | * - .trigger - with SNDRV_PCM_TRIGGER_STOP at XRUN or DRAINING state. | |
1808 | * - .get_time_info - to retrieve audio time stamp if needed. | |
1809 | * | |
1810 | * Even if more than one periods have elapsed since the last call, you have to call this only once. | |
1da177e4 | 1811 | */ |
47271b1b | 1812 | void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 | 1813 | { |
877211f5 | 1814 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1815 | |
f5cdc9d4 | 1816 | if (PCM_RUNTIME_CHECK(substream)) |
47271b1b | 1817 | return; |
f5cdc9d4 | 1818 | runtime = substream->runtime; |
1819 | ||
1da177e4 | 1820 | if (!snd_pcm_running(substream) || |
f240406b | 1821 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1822 | goto _end; |
1823 | ||
90bbaf66 | 1824 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1825 | if (substream->timer_running) |
1826 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1827 | #endif |
1da177e4 | 1828 | _end: |
96b09709 | 1829 | snd_kill_fasync(runtime->fasync, SIGIO, POLL_IN); |
47271b1b TS |
1830 | } |
1831 | EXPORT_SYMBOL(snd_pcm_period_elapsed_under_stream_lock); | |
1832 | ||
1833 | /** | |
1834 | * snd_pcm_period_elapsed() - update the status of runtime for the next period by acquiring lock of | |
1835 | * PCM substream. | |
1836 | * @substream: the instance of PCM substream. | |
1837 | * | |
1838 | * This function is mostly similar to ``snd_pcm_period_elapsed_under_stream_lock()`` except for | |
1839 | * acquiring lock of PCM substream voluntarily. | |
1840 | * | |
1841 | * It's typically called by any type of IRQ handler when hardware IRQ occurs to notify event that | |
1842 | * the batch of audio data frames as the same size as the period of buffer is already processed in | |
1843 | * audio data transmission. | |
1844 | */ | |
1845 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) | |
1846 | { | |
1847 | unsigned long flags; | |
1848 | ||
1849 | if (snd_BUG_ON(!substream)) | |
1850 | return; | |
1851 | ||
1852 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1853 | snd_pcm_period_elapsed_under_stream_lock(substream); | |
3aa02cb6 | 1854 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 | 1855 | } |
e88e8ae6 TI |
1856 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1857 | ||
13075510 TI |
1858 | /* |
1859 | * Wait until avail_min data becomes available | |
1860 | * Returns a negative error code if any error occurs during operation. | |
1861 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1862 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1863 | */ | |
5daeba34 | 1864 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1865 | snd_pcm_uframes_t *availp) |
1866 | { | |
1867 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1868 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1869 | wait_queue_entry_t wait; |
13075510 TI |
1870 | int err = 0; |
1871 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1872 | long wait_time, tout; |
1873 | ||
763437a9 AV |
1874 | init_waitqueue_entry(&wait, current); |
1875 | set_current_state(TASK_INTERRUPTIBLE); | |
1876 | add_wait_queue(&runtime->tsleep, &wait); | |
1877 | ||
f2b3614c TI |
1878 | if (runtime->no_period_wakeup) |
1879 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1880 | else { | |
d64c5cf8 LG |
1881 | /* use wait time from substream if available */ |
1882 | if (substream->wait_time) { | |
1883 | wait_time = substream->wait_time; | |
1884 | } else { | |
3ed2b549 | 1885 | wait_time = 100; |
d64c5cf8 LG |
1886 | |
1887 | if (runtime->rate) { | |
3ed2b549 | 1888 | long t = runtime->buffer_size * 1100 / runtime->rate; |
d64c5cf8 LG |
1889 | wait_time = max(t, wait_time); |
1890 | } | |
f2b3614c | 1891 | } |
3ed2b549 | 1892 | wait_time = msecs_to_jiffies(wait_time); |
f2b3614c | 1893 | } |
763437a9 | 1894 | |
13075510 TI |
1895 | for (;;) { |
1896 | if (signal_pending(current)) { | |
1897 | err = -ERESTARTSYS; | |
1898 | break; | |
1899 | } | |
763437a9 AV |
1900 | |
1901 | /* | |
1902 | * We need to check if space became available already | |
1903 | * (and thus the wakeup happened already) first to close | |
1904 | * the race of space already having become available. | |
1905 | * This check must happen after been added to the waitqueue | |
1906 | * and having current state be INTERRUPTIBLE. | |
1907 | */ | |
763e5067 | 1908 | avail = snd_pcm_avail(substream); |
763437a9 AV |
1909 | if (avail >= runtime->twake) |
1910 | break; | |
13075510 | 1911 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1912 | |
1913 | tout = schedule_timeout(wait_time); | |
1914 | ||
13075510 | 1915 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1916 | set_current_state(TASK_INTERRUPTIBLE); |
f0061c18 | 1917 | switch (runtime->state) { |
13075510 TI |
1918 | case SNDRV_PCM_STATE_SUSPENDED: |
1919 | err = -ESTRPIPE; | |
1920 | goto _endloop; | |
1921 | case SNDRV_PCM_STATE_XRUN: | |
1922 | err = -EPIPE; | |
1923 | goto _endloop; | |
1924 | case SNDRV_PCM_STATE_DRAINING: | |
1925 | if (is_playback) | |
1926 | err = -EPIPE; | |
1927 | else | |
1928 | avail = 0; /* indicate draining */ | |
1929 | goto _endloop; | |
1930 | case SNDRV_PCM_STATE_OPEN: | |
1931 | case SNDRV_PCM_STATE_SETUP: | |
1932 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1933 | err = -EBADFD; | |
1934 | goto _endloop; | |
ed697e1a JK |
1935 | case SNDRV_PCM_STATE_PAUSED: |
1936 | continue; | |
13075510 TI |
1937 | } |
1938 | if (!tout) { | |
09e56df8 | 1939 | pcm_dbg(substream->pcm, |
3ed2b549 OB |
1940 | "%s timeout (DMA or IRQ trouble?)\n", |
1941 | is_playback ? "playback write" : "capture read"); | |
13075510 TI |
1942 | err = -EIO; |
1943 | break; | |
1944 | } | |
13075510 TI |
1945 | } |
1946 | _endloop: | |
763437a9 | 1947 | set_current_state(TASK_RUNNING); |
c91a988d | 1948 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1949 | *availp = avail; |
1950 | return err; | |
1951 | } | |
1952 | ||
9f600630 TI |
1953 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1954 | int channel, unsigned long hwoff, | |
1955 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1956 | |
9f600630 TI |
1957 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1958 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1959 | ||
1960 | /* calculate the target DMA-buffer position to be written/read */ | |
1961 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1962 | int channel, unsigned long hwoff) | |
1da177e4 | 1963 | { |
9f600630 TI |
1964 | return runtime->dma_area + hwoff + |
1965 | channel * (runtime->dma_bytes / runtime->channels); | |
1966 | } | |
1967 | ||
5c7264cf TI |
1968 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1969 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1970 | int channel, unsigned long hwoff, | |
1971 | void *buf, unsigned long bytes) | |
9f600630 TI |
1972 | { |
1973 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1974 | (void __user *)buf, bytes)) |
9f600630 TI |
1975 | return -EFAULT; |
1976 | return 0; | |
1977 | } | |
1978 | ||
68541213 TI |
1979 | /* default copy_kernel ops for write */ |
1980 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, | |
1981 | int channel, unsigned long hwoff, | |
1982 | void *buf, unsigned long bytes) | |
1983 | { | |
1984 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); | |
1da177e4 LT |
1985 | return 0; |
1986 | } | |
1da177e4 | 1987 | |
9f600630 TI |
1988 | /* fill silence instead of copy data; called as a transfer helper |
1989 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1990 | * a NULL buffer is passed | |
1991 | */ | |
1992 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
1993 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 1994 | { |
877211f5 | 1995 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1996 | |
9f600630 | 1997 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
1da177e4 | 1998 | return 0; |
9f600630 TI |
1999 | if (substream->ops->fill_silence) |
2000 | return substream->ops->fill_silence(substream, channel, | |
2001 | hwoff, bytes); | |
1da177e4 | 2002 | |
9f600630 TI |
2003 | snd_pcm_format_set_silence(runtime->format, |
2004 | get_dma_ptr(runtime, channel, hwoff), | |
2005 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
2006 | return 0; |
2007 | } | |
1da177e4 | 2008 | |
5c7264cf TI |
2009 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
2010 | static int default_read_copy(struct snd_pcm_substream *substream, | |
2011 | int channel, unsigned long hwoff, | |
2012 | void *buf, unsigned long bytes) | |
2013 | { | |
2014 | if (copy_to_user((void __user *)buf, | |
2015 | get_dma_ptr(substream->runtime, channel, hwoff), | |
2016 | bytes)) | |
2017 | return -EFAULT; | |
2018 | return 0; | |
2019 | } | |
1da177e4 | 2020 | |
68541213 TI |
2021 | /* default copy_kernel ops for read */ |
2022 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, | |
2023 | int channel, unsigned long hwoff, | |
2024 | void *buf, unsigned long bytes) | |
2025 | { | |
2026 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); | |
2027 | return 0; | |
2028 | } | |
2029 | ||
9f600630 TI |
2030 | /* call transfer function with the converted pointers and sizes; |
2031 | * for interleaved mode, it's one shot for all samples | |
2032 | */ | |
2033 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
2034 | snd_pcm_uframes_t hwoff, void *data, | |
2035 | snd_pcm_uframes_t off, | |
2036 | snd_pcm_uframes_t frames, | |
2037 | pcm_transfer_f transfer) | |
2038 | { | |
2039 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2040 | ||
2041 | /* convert to bytes */ | |
2042 | hwoff = frames_to_bytes(runtime, hwoff); | |
2043 | off = frames_to_bytes(runtime, off); | |
2044 | frames = frames_to_bytes(runtime, frames); | |
2045 | return transfer(substream, 0, hwoff, data + off, frames); | |
2046 | } | |
2047 | ||
2048 | /* call transfer function with the converted pointers and sizes for each | |
2049 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
2050 | */ | |
2051 | static int noninterleaved_copy(struct snd_pcm_substream *substream, | |
2052 | snd_pcm_uframes_t hwoff, void *data, | |
2053 | snd_pcm_uframes_t off, | |
2054 | snd_pcm_uframes_t frames, | |
2055 | pcm_transfer_f transfer) | |
bdc4acf7 TI |
2056 | { |
2057 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2058 | int channels = runtime->channels; |
9f600630 TI |
2059 | void **bufs = data; |
2060 | int c, err; | |
2061 | ||
2062 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2063 | * in non-interleaved mode, we copy for each channel, thus | |
2064 | * each copy is n_samples bytes x channels = whole frames. | |
2065 | */ | |
2066 | off = samples_to_bytes(runtime, off); | |
2067 | frames = samples_to_bytes(runtime, frames); | |
2068 | hwoff = samples_to_bytes(runtime, hwoff); | |
2069 | for (c = 0; c < channels; ++c, ++bufs) { | |
2070 | if (!data || !*bufs) | |
2071 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2072 | else | |
2073 | err = transfer(substream, c, hwoff, *bufs + off, | |
2074 | frames); | |
2075 | if (err < 0) | |
2076 | return err; | |
1da177e4 | 2077 | } |
bdc4acf7 TI |
2078 | return 0; |
2079 | } | |
2080 | ||
a9cd29e7 TI |
2081 | /* fill silence on the given buffer position; |
2082 | * called from snd_pcm_playback_silence() | |
2083 | */ | |
2084 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2085 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2086 | { | |
2087 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2088 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2089 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2090 | fill_silence); | |
2091 | else | |
2092 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2093 | fill_silence); | |
1da177e4 LT |
2094 | } |
2095 | ||
7eaa943c TI |
2096 | /* sanity-check for read/write methods */ |
2097 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2098 | { |
877211f5 | 2099 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2100 | if (PCM_RUNTIME_CHECK(substream)) |
2101 | return -ENXIO; | |
1da177e4 | 2102 | runtime = substream->runtime; |
bdc4acf7 | 2103 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
7eaa943c | 2104 | return -EINVAL; |
f0061c18 | 2105 | if (runtime->state == SNDRV_PCM_STATE_OPEN) |
1da177e4 | 2106 | return -EBADFD; |
7eaa943c TI |
2107 | return 0; |
2108 | } | |
2109 | ||
6ba63929 | 2110 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
7eaa943c | 2111 | { |
f0061c18 | 2112 | switch (runtime->state) { |
6ba63929 TI |
2113 | case SNDRV_PCM_STATE_PREPARED: |
2114 | case SNDRV_PCM_STATE_RUNNING: | |
2115 | case SNDRV_PCM_STATE_PAUSED: | |
2116 | return 0; | |
2117 | case SNDRV_PCM_STATE_XRUN: | |
2118 | return -EPIPE; | |
2119 | case SNDRV_PCM_STATE_SUSPENDED: | |
2120 | return -ESTRPIPE; | |
2121 | default: | |
2122 | return -EBADFD; | |
2123 | } | |
1da177e4 LT |
2124 | } |
2125 | ||
66e01a5c TS |
2126 | /* update to the given appl_ptr and call ack callback if needed; |
2127 | * when an error is returned, take back to the original value | |
2128 | */ | |
2129 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, | |
2130 | snd_pcm_uframes_t appl_ptr) | |
1da177e4 | 2131 | { |
877211f5 | 2132 | struct snd_pcm_runtime *runtime = substream->runtime; |
66e01a5c | 2133 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
b456abe6 | 2134 | snd_pcm_sframes_t diff; |
66e01a5c TS |
2135 | int ret; |
2136 | ||
f8ff2f28 TI |
2137 | if (old_appl_ptr == appl_ptr) |
2138 | return 0; | |
2139 | ||
0e888a74 PLB |
2140 | if (appl_ptr >= runtime->boundary) |
2141 | return -EINVAL; | |
b456abe6 PLB |
2142 | /* |
2143 | * check if a rewind is requested by the application | |
2144 | */ | |
2145 | if (substream->runtime->info & SNDRV_PCM_INFO_NO_REWINDS) { | |
2146 | diff = appl_ptr - old_appl_ptr; | |
2147 | if (diff >= 0) { | |
2148 | if (diff > runtime->buffer_size) | |
2149 | return -EINVAL; | |
2150 | } else { | |
2151 | if (runtime->boundary + diff > runtime->buffer_size) | |
2152 | return -EINVAL; | |
2153 | } | |
2154 | } | |
0e888a74 | 2155 | |
66e01a5c TS |
2156 | runtime->control->appl_ptr = appl_ptr; |
2157 | if (substream->ops->ack) { | |
2158 | ret = substream->ops->ack(substream); | |
2159 | if (ret < 0) { | |
2160 | runtime->control->appl_ptr = old_appl_ptr; | |
8c721c53 TI |
2161 | if (ret == -EPIPE) |
2162 | __snd_pcm_xrun(substream); | |
66e01a5c | 2163 | return ret; |
1da177e4 LT |
2164 | } |
2165 | } | |
fccf5388 TS |
2166 | |
2167 | trace_applptr(substream, old_appl_ptr, appl_ptr); | |
2168 | ||
1da177e4 LT |
2169 | return 0; |
2170 | } | |
66e01a5c | 2171 | |
5c7264cf TI |
2172 | /* the common loop for read/write data */ |
2173 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2174 | void *data, bool interleaved, | |
68541213 | 2175 | snd_pcm_uframes_t size, bool in_kernel) |
1da177e4 | 2176 | { |
877211f5 | 2177 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2178 | snd_pcm_uframes_t xfer = 0; |
2179 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2180 | snd_pcm_uframes_t avail; |
9f600630 TI |
2181 | pcm_copy_f writer; |
2182 | pcm_transfer_f transfer; | |
c48f12ee | 2183 | bool nonblock; |
5c7264cf | 2184 | bool is_playback; |
7eaa943c | 2185 | int err; |
1da177e4 | 2186 | |
7eaa943c TI |
2187 | err = pcm_sanity_check(substream); |
2188 | if (err < 0) | |
2189 | return err; | |
e88e8ae6 | 2190 | |
5c7264cf | 2191 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2192 | if (interleaved) { |
2193 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2194 | runtime->channels > 1) | |
2195 | return -EINVAL; | |
9f600630 | 2196 | writer = interleaved_copy; |
1da177e4 | 2197 | } else { |
c48f12ee TI |
2198 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2199 | return -EINVAL; | |
9f600630 | 2200 | writer = noninterleaved_copy; |
1da177e4 | 2201 | } |
1da177e4 | 2202 | |
9f600630 | 2203 | if (!data) { |
5c7264cf TI |
2204 | if (is_playback) |
2205 | transfer = fill_silence; | |
2206 | else | |
2207 | return -EINVAL; | |
68541213 TI |
2208 | } else if (in_kernel) { |
2209 | if (substream->ops->copy_kernel) | |
2210 | transfer = substream->ops->copy_kernel; | |
2211 | else | |
2212 | transfer = is_playback ? | |
2213 | default_write_copy_kernel : default_read_copy_kernel; | |
9f600630 TI |
2214 | } else { |
2215 | if (substream->ops->copy_user) | |
2216 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2217 | else | |
5c7264cf TI |
2218 | transfer = is_playback ? |
2219 | default_write_copy : default_read_copy; | |
c48f12ee | 2220 | } |
1da177e4 LT |
2221 | |
2222 | if (size == 0) | |
2223 | return 0; | |
1da177e4 | 2224 | |
c48f12ee TI |
2225 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2226 | ||
1da177e4 | 2227 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2228 | err = pcm_accessible_state(runtime); |
2229 | if (err < 0) | |
1da177e4 | 2230 | goto _end_unlock; |
1da177e4 | 2231 | |
64b6acf6 | 2232 | runtime->twake = runtime->control->avail_min ? : 1; |
f0061c18 | 2233 | if (runtime->state == SNDRV_PCM_STATE_RUNNING) |
64b6acf6 RBP |
2234 | snd_pcm_update_hw_ptr(substream); |
2235 | ||
932a8151 RBP |
2236 | /* |
2237 | * If size < start_threshold, wait indefinitely. Another | |
2238 | * thread may start capture | |
2239 | */ | |
5c7264cf | 2240 | if (!is_playback && |
f0061c18 | 2241 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
00a399ca TI |
2242 | size >= runtime->start_threshold) { |
2243 | err = snd_pcm_start(substream); | |
2244 | if (err < 0) | |
6ba63929 | 2245 | goto _end_unlock; |
1da177e4 LT |
2246 | } |
2247 | ||
763e5067 | 2248 | avail = snd_pcm_avail(substream); |
64b6acf6 | 2249 | |
1da177e4 LT |
2250 | while (size > 0) { |
2251 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2252 | snd_pcm_uframes_t cont; |
13075510 | 2253 | if (!avail) { |
5c7264cf | 2254 | if (!is_playback && |
f0061c18 | 2255 | runtime->state == SNDRV_PCM_STATE_DRAINING) { |
13075510 | 2256 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2257 | goto _end_unlock; |
2258 | } | |
1da177e4 LT |
2259 | if (nonblock) { |
2260 | err = -EAGAIN; | |
2261 | goto _end_unlock; | |
2262 | } | |
5daeba34 DD |
2263 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2264 | runtime->control->avail_min ? : 1); | |
2265 | err = wait_for_avail(substream, &avail); | |
13075510 | 2266 | if (err < 0) |
443feb88 | 2267 | goto _end_unlock; |
13075510 TI |
2268 | if (!avail) |
2269 | continue; /* draining */ | |
1da177e4 | 2270 | } |
1da177e4 | 2271 | frames = size > avail ? avail : size; |
aa30db06 TI |
2272 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
2273 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2274 | cont = runtime->buffer_size - appl_ofs; | |
1da177e4 LT |
2275 | if (frames > cont) |
2276 | frames = cont; | |
7eaa943c | 2277 | if (snd_BUG_ON(!frames)) { |
315d9f1b TI |
2278 | err = -EINVAL; |
2279 | goto _end_unlock; | |
7eaa943c | 2280 | } |
bc55cfd5 TI |
2281 | if (!atomic_inc_unless_negative(&runtime->buffer_accessing)) { |
2282 | err = -EBUSY; | |
2283 | goto _end_unlock; | |
2284 | } | |
1da177e4 | 2285 | snd_pcm_stream_unlock_irq(substream); |
a25684a9 TI |
2286 | if (!is_playback) |
2287 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_CPU); | |
5c7264cf | 2288 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2289 | transfer); |
a25684a9 TI |
2290 | if (is_playback) |
2291 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); | |
1da177e4 | 2292 | snd_pcm_stream_lock_irq(substream); |
bc55cfd5 | 2293 | atomic_dec(&runtime->buffer_accessing); |
1250932e JK |
2294 | if (err < 0) |
2295 | goto _end_unlock; | |
6ba63929 TI |
2296 | err = pcm_accessible_state(runtime); |
2297 | if (err < 0) | |
1da177e4 | 2298 | goto _end_unlock; |
1da177e4 LT |
2299 | appl_ptr += frames; |
2300 | if (appl_ptr >= runtime->boundary) | |
2301 | appl_ptr -= runtime->boundary; | |
66e01a5c TS |
2302 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
2303 | if (err < 0) | |
2304 | goto _end_unlock; | |
1da177e4 LT |
2305 | |
2306 | offset += frames; | |
2307 | size -= frames; | |
2308 | xfer += frames; | |
0910c216 | 2309 | avail -= frames; |
5c7264cf | 2310 | if (is_playback && |
f0061c18 | 2311 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
5c7264cf TI |
2312 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { |
2313 | err = snd_pcm_start(substream); | |
2314 | if (err < 0) | |
2315 | goto _end_unlock; | |
2316 | } | |
1da177e4 LT |
2317 | } |
2318 | _end_unlock: | |
c91a988d | 2319 | runtime->twake = 0; |
1250932e JK |
2320 | if (xfer > 0 && err >= 0) |
2321 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2322 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2323 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2324 | } | |
5c7264cf | 2325 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2326 | |
2327 | /* | |
2328 | * standard channel mapping helpers | |
2329 | */ | |
2330 | ||
2331 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2332 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2333 | { .channels = 1, | |
5efbc261 | 2334 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2335 | { .channels = 2, |
2336 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2337 | { .channels = 4, | |
2338 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2339 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2340 | { .channels = 6, | |
2341 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2342 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2343 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2344 | { .channels = 8, | |
2345 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2346 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2347 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2348 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2349 | { } | |
2350 | }; | |
2351 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2352 | ||
2353 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2354 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2355 | { .channels = 1, | |
5efbc261 | 2356 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2357 | { .channels = 2, |
2358 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2359 | { .channels = 4, | |
2360 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2361 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2362 | { .channels = 6, | |
2363 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2364 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2365 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2366 | { .channels = 8, | |
2367 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2368 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2369 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2370 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2371 | { } | |
2372 | }; | |
2373 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2374 | ||
2375 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2376 | { | |
2377 | if (ch > info->max_channels) | |
2378 | return false; | |
2379 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2380 | } | |
2381 | ||
2382 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2383 | struct snd_ctl_elem_info *uinfo) | |
2384 | { | |
2385 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2386 | ||
2387 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2d3391ec TI |
2388 | uinfo->count = info->max_channels; |
2389 | uinfo->value.integer.min = 0; | |
2390 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2391 | return 0; | |
2392 | } | |
2393 | ||
2394 | /* get callback for channel map ctl element | |
2395 | * stores the channel position firstly matching with the current channels | |
2396 | */ | |
2397 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2398 | struct snd_ctl_elem_value *ucontrol) | |
2399 | { | |
2400 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2401 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2402 | struct snd_pcm_substream *substream; | |
2403 | const struct snd_pcm_chmap_elem *map; | |
2404 | ||
2deaeaf1 | 2405 | if (!info->chmap) |
2d3391ec TI |
2406 | return -EINVAL; |
2407 | substream = snd_pcm_chmap_substream(info, idx); | |
2408 | if (!substream) | |
2409 | return -ENODEV; | |
2410 | memset(ucontrol->value.integer.value, 0, | |
fbd3eb7f | 2411 | sizeof(long) * info->max_channels); |
2d3391ec TI |
2412 | if (!substream->runtime) |
2413 | return 0; /* no channels set */ | |
2414 | for (map = info->chmap; map->channels; map++) { | |
2415 | int i; | |
2416 | if (map->channels == substream->runtime->channels && | |
2417 | valid_chmap_channels(info, map->channels)) { | |
2418 | for (i = 0; i < map->channels; i++) | |
2419 | ucontrol->value.integer.value[i] = map->map[i]; | |
2420 | return 0; | |
2421 | } | |
2422 | } | |
2423 | return -EINVAL; | |
2424 | } | |
2425 | ||
2426 | /* tlv callback for channel map ctl element | |
2427 | * expands the pre-defined channel maps in a form of TLV | |
2428 | */ | |
2429 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2430 | unsigned int size, unsigned int __user *tlv) | |
2431 | { | |
2432 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2433 | const struct snd_pcm_chmap_elem *map; | |
2434 | unsigned int __user *dst; | |
2435 | int c, count = 0; | |
2436 | ||
2deaeaf1 | 2437 | if (!info->chmap) |
2d3391ec TI |
2438 | return -EINVAL; |
2439 | if (size < 8) | |
2440 | return -ENOMEM; | |
2441 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2442 | return -EFAULT; | |
2443 | size -= 8; | |
2444 | dst = tlv + 2; | |
2445 | for (map = info->chmap; map->channels; map++) { | |
2446 | int chs_bytes = map->channels * 4; | |
2447 | if (!valid_chmap_channels(info, map->channels)) | |
2448 | continue; | |
2449 | if (size < 8) | |
2450 | return -ENOMEM; | |
2451 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2452 | put_user(chs_bytes, dst + 1)) | |
2453 | return -EFAULT; | |
2454 | dst += 2; | |
2455 | size -= 8; | |
2456 | count += 8; | |
2457 | if (size < chs_bytes) | |
2458 | return -ENOMEM; | |
2459 | size -= chs_bytes; | |
2460 | count += chs_bytes; | |
2461 | for (c = 0; c < map->channels; c++) { | |
2462 | if (put_user(map->map[c], dst)) | |
2463 | return -EFAULT; | |
2464 | dst++; | |
2465 | } | |
2466 | } | |
2467 | if (put_user(count, tlv + 1)) | |
2468 | return -EFAULT; | |
2469 | return 0; | |
2470 | } | |
2471 | ||
2472 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2473 | { | |
2474 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2475 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2476 | kfree(info); | |
2477 | } | |
2478 | ||
2479 | /** | |
2480 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2481 | * @pcm: the assigned PCM instance | |
2482 | * @stream: stream direction | |
2483 | * @chmap: channel map elements (for query) | |
2484 | * @max_channels: the max number of channels for the stream | |
2485 | * @private_value: the value passed to each kcontrol's private_value field | |
2486 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2487 | * | |
2488 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2489 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2490 | */ |
2491 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2492 | const struct snd_pcm_chmap_elem *chmap, | |
2493 | int max_channels, | |
2494 | unsigned long private_value, | |
2495 | struct snd_pcm_chmap **info_ret) | |
2496 | { | |
2497 | struct snd_pcm_chmap *info; | |
2498 | struct snd_kcontrol_new knew = { | |
2499 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2500 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2501 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2502 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2503 | .info = pcm_chmap_ctl_info, | |
2504 | .get = pcm_chmap_ctl_get, | |
2505 | .tlv.c = pcm_chmap_ctl_tlv, | |
2506 | }; | |
2507 | int err; | |
2508 | ||
8d879be8 TI |
2509 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2510 | return -EBUSY; | |
2d3391ec TI |
2511 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2512 | if (!info) | |
2513 | return -ENOMEM; | |
2514 | info->pcm = pcm; | |
2515 | info->stream = stream; | |
2516 | info->chmap = chmap; | |
2517 | info->max_channels = max_channels; | |
2518 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2519 | knew.name = "Playback Channel Map"; | |
2520 | else | |
2521 | knew.name = "Capture Channel Map"; | |
2522 | knew.device = pcm->device; | |
2523 | knew.count = pcm->streams[stream].substream_count; | |
2524 | knew.private_value = private_value; | |
2525 | info->kctl = snd_ctl_new1(&knew, info); | |
2526 | if (!info->kctl) { | |
2527 | kfree(info); | |
2528 | return -ENOMEM; | |
2529 | } | |
2530 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2531 | err = snd_ctl_add(pcm->card, info->kctl); | |
2532 | if (err < 0) | |
2533 | return err; | |
2534 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2535 | if (info_ret) | |
2536 | *info_ret = info; | |
2537 | return 0; | |
2538 | } | |
2539 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |