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 | */ | |
9f656705 | 45 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream) |
1da177e4 | 46 | { |
877211f5 | 47 | struct snd_pcm_runtime *runtime = substream->runtime; |
9f656705 OB |
48 | snd_pcm_uframes_t appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
49 | snd_pcm_sframes_t added, hw_avail, frames; | |
50 | snd_pcm_uframes_t noise_dist, ofs, transfer; | |
29d1a873 | 51 | int err; |
1da177e4 | 52 | |
9f656705 OB |
53 | added = appl_ptr - runtime->silence_start; |
54 | if (added) { | |
55 | if (added < 0) | |
56 | added += runtime->boundary; | |
57 | if (added < runtime->silence_filled) | |
58 | runtime->silence_filled -= added; | |
59 | else | |
60 | runtime->silence_filled = 0; | |
61 | runtime->silence_start = appl_ptr; | |
62 | } | |
63 | ||
64 | // This will "legitimately" turn negative on underrun, and will be mangled | |
65 | // into a huge number by the boundary crossing handling. The initial state | |
66 | // might also be not quite sane. The code below MUST account for these cases. | |
67 | hw_avail = appl_ptr - runtime->status->hw_ptr; | |
68 | if (hw_avail < 0) | |
69 | hw_avail += runtime->boundary; | |
70 | ||
71 | noise_dist = hw_avail + runtime->silence_filled; | |
1da177e4 | 72 | if (runtime->silence_size < runtime->boundary) { |
1da177e4 | 73 | frames = runtime->silence_threshold - noise_dist; |
9f656705 OB |
74 | if (frames <= 0) |
75 | return; | |
1da177e4 LT |
76 | if (frames > runtime->silence_size) |
77 | frames = runtime->silence_size; | |
78 | } else { | |
9f656705 OB |
79 | frames = runtime->buffer_size - noise_dist; |
80 | if (frames <= 0) | |
81 | return; | |
1da177e4 | 82 | } |
9f656705 | 83 | |
7eaa943c TI |
84 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
85 | return; | |
9f656705 OB |
86 | ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size; |
87 | do { | |
1da177e4 | 88 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; |
a9cd29e7 TI |
89 | err = fill_silence_frames(substream, ofs, transfer); |
90 | snd_BUG_ON(err < 0); | |
1da177e4 LT |
91 | runtime->silence_filled += transfer; |
92 | frames -= transfer; | |
93 | ofs = 0; | |
9f656705 | 94 | } while (frames > 0); |
a25684a9 | 95 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); |
1da177e4 LT |
96 | } |
97 | ||
acb03d44 EB |
98 | #ifdef CONFIG_SND_DEBUG |
99 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
100 | char *name, size_t len) |
101 | { | |
102 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
103 | substream->pcm->card->number, | |
104 | substream->pcm->device, | |
105 | substream->stream ? 'c' : 'p', | |
106 | substream->number); | |
107 | } | |
acb03d44 EB |
108 | EXPORT_SYMBOL(snd_pcm_debug_name); |
109 | #endif | |
c0070110 | 110 | |
741b20cf JK |
111 | #define XRUN_DEBUG_BASIC (1<<0) |
112 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
113 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 114 | |
ed3da3d9 | 115 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 116 | |
741b20cf JK |
117 | #define xrun_debug(substream, mask) \ |
118 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
119 | #else |
120 | #define xrun_debug(substream, mask) 0 | |
121 | #endif | |
ed3da3d9 | 122 | |
741b20cf JK |
123 | #define dump_stack_on_xrun(substream) do { \ |
124 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
125 | dump_stack(); \ | |
ed3da3d9 TI |
126 | } while (0) |
127 | ||
9cd641ed TI |
128 | /* call with stream lock held */ |
129 | void __snd_pcm_xrun(struct snd_pcm_substream *substream) | |
1da177e4 | 130 | { |
13f040f9 JK |
131 | struct snd_pcm_runtime *runtime = substream->runtime; |
132 | ||
f5914908 | 133 | trace_xrun(substream); |
fcae40c9 BW |
134 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
135 | struct timespec64 tstamp; | |
136 | ||
137 | snd_pcm_gettime(runtime, &tstamp); | |
80fe7430 AB |
138 | runtime->status->tstamp.tv_sec = tstamp.tv_sec; |
139 | runtime->status->tstamp.tv_nsec = tstamp.tv_nsec; | |
fcae40c9 | 140 | } |
1da177e4 | 141 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 142 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 143 | char name[16]; |
acb03d44 | 144 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 145 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 146 | dump_stack_on_xrun(substream); |
1da177e4 | 147 | } |
1da177e4 LT |
148 | } |
149 | ||
0f17014b | 150 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 151 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 152 | do { \ |
f5914908 | 153 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 154 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
155 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
156 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
157 | dump_stack_on_xrun(substream); \ |
158 | } \ | |
159 | } while (0) | |
160 | ||
4d96eb25 JK |
161 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
162 | ||
4d96eb25 | 163 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
164 | |
165 | #endif | |
166 | ||
1250932e JK |
167 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
168 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
169 | { |
170 | snd_pcm_uframes_t avail; | |
171 | ||
763e5067 | 172 | avail = snd_pcm_avail(substream); |
1da177e4 LT |
173 | if (avail > runtime->avail_max) |
174 | runtime->avail_max = avail; | |
f0061c18 | 175 | if (runtime->state == SNDRV_PCM_STATE_DRAINING) { |
4cdc115f | 176 | if (avail >= runtime->buffer_size) { |
1da177e4 | 177 | snd_pcm_drain_done(substream); |
4cdc115f TI |
178 | return -EPIPE; |
179 | } | |
180 | } else { | |
181 | if (avail >= runtime->stop_threshold) { | |
9cd641ed | 182 | __snd_pcm_xrun(substream); |
4cdc115f TI |
183 | return -EPIPE; |
184 | } | |
1da177e4 | 185 | } |
5daeba34 DD |
186 | if (runtime->twake) { |
187 | if (avail >= runtime->twake) | |
188 | wake_up(&runtime->tsleep); | |
189 | } else if (avail >= runtime->control->avail_min) | |
190 | wake_up(&runtime->sleep); | |
1da177e4 LT |
191 | return 0; |
192 | } | |
193 | ||
3179f620 | 194 | static void update_audio_tstamp(struct snd_pcm_substream *substream, |
fcae40c9 BW |
195 | struct timespec64 *curr_tstamp, |
196 | struct timespec64 *audio_tstamp) | |
3179f620 PLB |
197 | { |
198 | struct snd_pcm_runtime *runtime = substream->runtime; | |
199 | u64 audio_frames, audio_nsecs; | |
fcae40c9 | 200 | struct timespec64 driver_tstamp; |
3179f620 PLB |
201 | |
202 | if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) | |
203 | return; | |
204 | ||
205 | if (!(substream->ops->get_time_info) || | |
206 | (runtime->audio_tstamp_report.actual_type == | |
207 | SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
208 | ||
209 | /* | |
210 | * provide audio timestamp derived from pointer position | |
211 | * add delay only if requested | |
212 | */ | |
213 | ||
214 | audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; | |
215 | ||
216 | if (runtime->audio_tstamp_config.report_delay) { | |
217 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
218 | audio_frames -= runtime->delay; | |
219 | else | |
220 | audio_frames += runtime->delay; | |
221 | } | |
222 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
223 | runtime->rate); | |
fcae40c9 | 224 | *audio_tstamp = ns_to_timespec64(audio_nsecs); |
3179f620 | 225 | } |
fcae40c9 BW |
226 | |
227 | if (runtime->status->audio_tstamp.tv_sec != audio_tstamp->tv_sec || | |
228 | runtime->status->audio_tstamp.tv_nsec != audio_tstamp->tv_nsec) { | |
80fe7430 AB |
229 | runtime->status->audio_tstamp.tv_sec = audio_tstamp->tv_sec; |
230 | runtime->status->audio_tstamp.tv_nsec = audio_tstamp->tv_nsec; | |
231 | runtime->status->tstamp.tv_sec = curr_tstamp->tv_sec; | |
232 | runtime->status->tstamp.tv_nsec = curr_tstamp->tv_nsec; | |
20e3f985 | 233 | } |
3179f620 | 234 | |
fcae40c9 | 235 | |
3179f620 PLB |
236 | /* |
237 | * re-take a driver timestamp to let apps detect if the reference tstamp | |
238 | * read by low-level hardware was provided with a delay | |
239 | */ | |
fcae40c9 | 240 | snd_pcm_gettime(substream->runtime, &driver_tstamp); |
3179f620 PLB |
241 | runtime->driver_tstamp = driver_tstamp; |
242 | } | |
243 | ||
f240406b JK |
244 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
245 | unsigned int in_interrupt) | |
1da177e4 | 246 | { |
877211f5 | 247 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 248 | snd_pcm_uframes_t pos; |
f240406b | 249 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
250 | snd_pcm_sframes_t hdelta, delta; |
251 | unsigned long jdelta; | |
3509a03f | 252 | unsigned long curr_jiffies; |
fcae40c9 BW |
253 | struct timespec64 curr_tstamp; |
254 | struct timespec64 audio_tstamp; | |
0e8014d7 | 255 | int crossed_boundary = 0; |
1da177e4 | 256 | |
bbf6ad13 | 257 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
258 | |
259 | /* | |
260 | * group pointer, time and jiffies reads to allow for more | |
261 | * accurate correlations/corrections. | |
262 | * The values are stored at the end of this routine after | |
263 | * corrections for hw_ptr position | |
264 | */ | |
f240406b | 265 | pos = substream->ops->pointer(substream); |
3509a03f | 266 | curr_jiffies = jiffies; |
4eeaaeae | 267 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3179f620 PLB |
268 | if ((substream->ops->get_time_info) && |
269 | (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { | |
270 | substream->ops->get_time_info(substream, &curr_tstamp, | |
271 | &audio_tstamp, | |
272 | &runtime->audio_tstamp_config, | |
273 | &runtime->audio_tstamp_report); | |
274 | ||
275 | /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ | |
276 | if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) | |
fcae40c9 | 277 | snd_pcm_gettime(runtime, &curr_tstamp); |
3179f620 | 278 | } else |
fcae40c9 | 279 | snd_pcm_gettime(runtime, &curr_tstamp); |
4eeaaeae PLB |
280 | } |
281 | ||
1da177e4 | 282 | if (pos == SNDRV_PCM_POS_XRUN) { |
9cd641ed | 283 | __snd_pcm_xrun(substream); |
1da177e4 LT |
284 | return -EPIPE; |
285 | } | |
f240406b | 286 | if (pos >= runtime->buffer_size) { |
09e56df8 | 287 | if (printk_ratelimit()) { |
f240406b | 288 | char name[16]; |
acb03d44 | 289 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 290 | pcm_err(substream->pcm, |
0ab1ace8 | 291 | "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
292 | name, pos, runtime->buffer_size, |
293 | runtime->period_size); | |
f240406b JK |
294 | } |
295 | pos = 0; | |
cedb8118 | 296 | } |
f240406b | 297 | pos -= pos % runtime->min_align; |
f5914908 | 298 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
299 | hw_base = runtime->hw_ptr_base; |
300 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
301 | if (in_interrupt) { |
302 | /* we know that one period was processed */ | |
303 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 304 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 305 | if (delta > new_hw_ptr) { |
bd76af0f | 306 | /* check for double acknowledged interrupts */ |
3509a03f | 307 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
13a98839 | 308 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { |
bd76af0f | 309 | hw_base += runtime->buffer_size; |
0e8014d7 | 310 | if (hw_base >= runtime->boundary) { |
bd76af0f | 311 | hw_base = 0; |
0e8014d7 PLB |
312 | crossed_boundary++; |
313 | } | |
bd76af0f JK |
314 | new_hw_ptr = hw_base + pos; |
315 | goto __delta; | |
316 | } | |
1da177e4 | 317 | } |
1da177e4 | 318 | } |
f240406b JK |
319 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
320 | /* pointer crosses the end of the ring buffer */ | |
321 | if (new_hw_ptr < old_hw_ptr) { | |
322 | hw_base += runtime->buffer_size; | |
0e8014d7 | 323 | if (hw_base >= runtime->boundary) { |
f240406b | 324 | hw_base = 0; |
0e8014d7 PLB |
325 | crossed_boundary++; |
326 | } | |
f240406b JK |
327 | new_hw_ptr = hw_base + pos; |
328 | } | |
329 | __delta: | |
b406e610 CL |
330 | delta = new_hw_ptr - old_hw_ptr; |
331 | if (delta < 0) | |
332 | delta += runtime->boundary; | |
ab69a490 | 333 | |
59ff878f | 334 | if (runtime->no_period_wakeup) { |
12ff414e | 335 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
336 | /* |
337 | * Without regular period interrupts, we have to check | |
338 | * the elapsed time to detect xruns. | |
339 | */ | |
3509a03f | 340 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
341 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
342 | goto no_delta_check; | |
59ff878f | 343 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
344 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
345 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
346 | delta += runtime->buffer_size; |
347 | hw_base += runtime->buffer_size; | |
0e8014d7 | 348 | if (hw_base >= runtime->boundary) { |
59ff878f | 349 | hw_base = 0; |
0e8014d7 PLB |
350 | crossed_boundary++; |
351 | } | |
59ff878f CL |
352 | new_hw_ptr = hw_base + pos; |
353 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
354 | } | |
ab69a490 | 355 | goto no_delta_check; |
59ff878f | 356 | } |
ab69a490 | 357 | |
f240406b | 358 | /* something must be really wrong */ |
7b3a177b | 359 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
360 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
361 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
362 | substream->stream, (long)pos, | |
363 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
364 | return 0; |
365 | } | |
c87d9732 TI |
366 | |
367 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 368 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
369 | goto no_jiffies_check; |
370 | ||
3e5b5016 TI |
371 | /* Skip the jiffies check for hardwares with BATCH flag. |
372 | * Such hardware usually just increases the position at each IRQ, | |
373 | * thus it can't give any strange position. | |
374 | */ | |
375 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
376 | goto no_jiffies_check; | |
f240406b | 377 | hdelta = delta; |
a4444da3 JK |
378 | if (hdelta < runtime->delay) |
379 | goto no_jiffies_check; | |
380 | hdelta -= runtime->delay; | |
3509a03f | 381 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
382 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
383 | delta = jdelta / | |
384 | (((runtime->period_size * HZ) / runtime->rate) | |
385 | + HZ/100); | |
f240406b JK |
386 | /* move new_hw_ptr according jiffies not pos variable */ |
387 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 388 | hw_base = delta; |
f240406b JK |
389 | /* use loop to avoid checks for delta overflows */ |
390 | /* the delta value is small or zero in most cases */ | |
391 | while (delta > 0) { | |
392 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 393 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 394 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
395 | crossed_boundary--; |
396 | } | |
f240406b JK |
397 | delta--; |
398 | } | |
399 | /* align hw_base to buffer_size */ | |
f5914908 TI |
400 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
401 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
402 | (long)pos, (long)hdelta, |
403 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 404 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
405 | (unsigned long)old_hw_ptr, |
406 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
407 | /* reset values to proper state */ |
408 | delta = 0; | |
409 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 410 | } |
3e5b5016 | 411 | no_jiffies_check: |
bbf6ad13 | 412 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
413 | hw_ptr_error(substream, in_interrupt, |
414 | "Lost interrupts?", | |
415 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 416 | substream->stream, (long)delta, |
f240406b JK |
417 | (long)new_hw_ptr, |
418 | (long)old_hw_ptr); | |
ed3da3d9 | 419 | } |
f240406b | 420 | |
ab69a490 | 421 | no_delta_check: |
3179f620 | 422 | if (runtime->status->hw_ptr == new_hw_ptr) { |
e7513c57 | 423 | runtime->hw_ptr_jiffies = curr_jiffies; |
3179f620 | 424 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
f240406b | 425 | return 0; |
3179f620 | 426 | } |
ab1863fc | 427 | |
e7636925 | 428 | if (in_interrupt) { |
ead4046b CL |
429 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
430 | if (delta < 0) | |
431 | delta += runtime->boundary; | |
432 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
433 | runtime->hw_ptr_interrupt += delta; | |
434 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
435 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 436 | } |
ed3da3d9 | 437 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 438 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 439 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
440 | if (crossed_boundary) { |
441 | snd_BUG_ON(crossed_boundary != 1); | |
442 | runtime->hw_ptr_wrap += runtime->boundary; | |
443 | } | |
4eeaaeae | 444 | |
9f656705 OB |
445 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
446 | runtime->silence_size > 0) | |
447 | snd_pcm_playback_silence(substream); | |
448 | ||
3179f620 | 449 | update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); |
4eeaaeae | 450 | |
1250932e | 451 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
452 | } |
453 | ||
454 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 455 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 456 | { |
f240406b | 457 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
458 | } |
459 | ||
460 | /** | |
461 | * snd_pcm_set_ops - set the PCM operators | |
462 | * @pcm: the pcm instance | |
463 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
464 | * @ops: the operator table | |
465 | * | |
466 | * Sets the given PCM operators to the pcm instance. | |
467 | */ | |
e6c2e7eb LPC |
468 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
469 | const struct snd_pcm_ops *ops) | |
1da177e4 | 470 | { |
877211f5 TI |
471 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
472 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
473 | |
474 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
475 | substream->ops = ops; | |
476 | } | |
e88e8ae6 | 477 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
478 | |
479 | /** | |
f7b6603c | 480 | * snd_pcm_set_sync - set the PCM sync id |
1da177e4 LT |
481 | * @substream: the pcm substream |
482 | * | |
483 | * Sets the PCM sync identifier for the card. | |
484 | */ | |
877211f5 | 485 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 486 | { |
877211f5 | 487 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
488 | |
489 | runtime->sync.id32[0] = substream->pcm->card->number; | |
490 | runtime->sync.id32[1] = -1; | |
491 | runtime->sync.id32[2] = -1; | |
492 | runtime->sync.id32[3] = -1; | |
493 | } | |
e88e8ae6 TI |
494 | EXPORT_SYMBOL(snd_pcm_set_sync); |
495 | ||
1da177e4 LT |
496 | /* |
497 | * Standard ioctl routine | |
498 | */ | |
499 | ||
1da177e4 LT |
500 | static inline unsigned int div32(unsigned int a, unsigned int b, |
501 | unsigned int *r) | |
502 | { | |
503 | if (b == 0) { | |
504 | *r = 0; | |
505 | return UINT_MAX; | |
506 | } | |
507 | *r = a % b; | |
508 | return a / b; | |
509 | } | |
510 | ||
511 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
512 | { | |
513 | if (b == 0) | |
514 | return UINT_MAX; | |
515 | return a / b; | |
516 | } | |
517 | ||
518 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
519 | { | |
520 | unsigned int r; | |
521 | unsigned int q; | |
522 | if (b == 0) | |
523 | return UINT_MAX; | |
524 | q = div32(a, b, &r); | |
525 | if (r) | |
526 | ++q; | |
527 | return q; | |
528 | } | |
529 | ||
530 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
531 | { | |
532 | if (a == 0) | |
533 | return 0; | |
534 | if (div_down(UINT_MAX, a) < b) | |
535 | return UINT_MAX; | |
536 | return a * b; | |
537 | } | |
538 | ||
539 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
540 | unsigned int c, unsigned int *r) | |
541 | { | |
542 | u_int64_t n = (u_int64_t) a * b; | |
543 | if (c == 0) { | |
1da177e4 LT |
544 | *r = 0; |
545 | return UINT_MAX; | |
546 | } | |
3f7440a6 | 547 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
548 | if (n >= UINT_MAX) { |
549 | *r = 0; | |
550 | return UINT_MAX; | |
551 | } | |
552 | return n; | |
553 | } | |
554 | ||
1da177e4 LT |
555 | /** |
556 | * snd_interval_refine - refine the interval value of configurator | |
557 | * @i: the interval value to refine | |
558 | * @v: the interval value to refer to | |
559 | * | |
560 | * Refines the interval value with the reference value. | |
561 | * The interval is changed to the range satisfying both intervals. | |
562 | * The interval status (min, max, integer, etc.) are evaluated. | |
563 | * | |
eb7c06e8 YB |
564 | * Return: Positive if the value is changed, zero if it's not changed, or a |
565 | * negative error code. | |
1da177e4 | 566 | */ |
877211f5 | 567 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
568 | { |
569 | int changed = 0; | |
7eaa943c TI |
570 | if (snd_BUG_ON(snd_interval_empty(i))) |
571 | return -EINVAL; | |
1da177e4 LT |
572 | if (i->min < v->min) { |
573 | i->min = v->min; | |
574 | i->openmin = v->openmin; | |
575 | changed = 1; | |
576 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
577 | i->openmin = 1; | |
578 | changed = 1; | |
579 | } | |
580 | if (i->max > v->max) { | |
581 | i->max = v->max; | |
582 | i->openmax = v->openmax; | |
583 | changed = 1; | |
584 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
585 | i->openmax = 1; | |
586 | changed = 1; | |
587 | } | |
588 | if (!i->integer && v->integer) { | |
589 | i->integer = 1; | |
590 | changed = 1; | |
591 | } | |
592 | if (i->integer) { | |
593 | if (i->openmin) { | |
594 | i->min++; | |
595 | i->openmin = 0; | |
596 | } | |
597 | if (i->openmax) { | |
598 | i->max--; | |
599 | i->openmax = 0; | |
600 | } | |
601 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
602 | i->integer = 1; | |
603 | if (snd_interval_checkempty(i)) { | |
604 | snd_interval_none(i); | |
605 | return -EINVAL; | |
606 | } | |
607 | return changed; | |
608 | } | |
e88e8ae6 TI |
609 | EXPORT_SYMBOL(snd_interval_refine); |
610 | ||
877211f5 | 611 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 612 | { |
ff2d6acd TW |
613 | const unsigned int last_max = i->max; |
614 | ||
7eaa943c TI |
615 | if (snd_BUG_ON(snd_interval_empty(i))) |
616 | return -EINVAL; | |
1da177e4 LT |
617 | if (snd_interval_single(i)) |
618 | return 0; | |
619 | i->max = i->min; | |
ff2d6acd | 620 | if (i->openmin) |
1da177e4 | 621 | i->max++; |
ff2d6acd TW |
622 | /* only exclude max value if also excluded before refine */ |
623 | i->openmax = (i->openmax && i->max >= last_max); | |
1da177e4 LT |
624 | return 1; |
625 | } | |
626 | ||
877211f5 | 627 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 628 | { |
ff2d6acd TW |
629 | const unsigned int last_min = i->min; |
630 | ||
7eaa943c TI |
631 | if (snd_BUG_ON(snd_interval_empty(i))) |
632 | return -EINVAL; | |
1da177e4 LT |
633 | if (snd_interval_single(i)) |
634 | return 0; | |
635 | i->min = i->max; | |
ff2d6acd | 636 | if (i->openmax) |
1da177e4 | 637 | i->min--; |
ff2d6acd TW |
638 | /* only exclude min value if also excluded before refine */ |
639 | i->openmin = (i->openmin && i->min <= last_min); | |
1da177e4 LT |
640 | return 1; |
641 | } | |
642 | ||
877211f5 | 643 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
644 | { |
645 | if (a->empty || b->empty) { | |
646 | snd_interval_none(c); | |
647 | return; | |
648 | } | |
649 | c->empty = 0; | |
650 | c->min = mul(a->min, b->min); | |
651 | c->openmin = (a->openmin || b->openmin); | |
652 | c->max = mul(a->max, b->max); | |
653 | c->openmax = (a->openmax || b->openmax); | |
654 | c->integer = (a->integer && b->integer); | |
655 | } | |
656 | ||
657 | /** | |
658 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
659 | * @a: dividend |
660 | * @b: divisor | |
661 | * @c: quotient | |
1da177e4 LT |
662 | * |
663 | * c = a / b | |
664 | * | |
665 | * Returns non-zero if the value is changed, zero if not changed. | |
666 | */ | |
877211f5 | 667 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
668 | { |
669 | unsigned int r; | |
670 | if (a->empty || b->empty) { | |
671 | snd_interval_none(c); | |
672 | return; | |
673 | } | |
674 | c->empty = 0; | |
675 | c->min = div32(a->min, b->max, &r); | |
676 | c->openmin = (r || a->openmin || b->openmax); | |
677 | if (b->min > 0) { | |
678 | c->max = div32(a->max, b->min, &r); | |
679 | if (r) { | |
680 | c->max++; | |
681 | c->openmax = 1; | |
682 | } else | |
683 | c->openmax = (a->openmax || b->openmin); | |
684 | } else { | |
685 | c->max = UINT_MAX; | |
686 | c->openmax = 0; | |
687 | } | |
688 | c->integer = 0; | |
689 | } | |
690 | ||
691 | /** | |
692 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
693 | * @a: dividend 1 |
694 | * @b: dividend 2 | |
695 | * @k: divisor (as integer) | |
696 | * @c: result | |
697 | * | |
1da177e4 LT |
698 | * c = a * b / k |
699 | * | |
700 | * Returns non-zero if the value is changed, zero if not changed. | |
701 | */ | |
877211f5 TI |
702 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
703 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
704 | { |
705 | unsigned int r; | |
706 | if (a->empty || b->empty) { | |
707 | snd_interval_none(c); | |
708 | return; | |
709 | } | |
710 | c->empty = 0; | |
711 | c->min = muldiv32(a->min, b->min, k, &r); | |
712 | c->openmin = (r || a->openmin || b->openmin); | |
713 | c->max = muldiv32(a->max, b->max, k, &r); | |
714 | if (r) { | |
715 | c->max++; | |
716 | c->openmax = 1; | |
717 | } else | |
718 | c->openmax = (a->openmax || b->openmax); | |
719 | c->integer = 0; | |
720 | } | |
721 | ||
722 | /** | |
723 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
724 | * @a: dividend 1 |
725 | * @k: dividend 2 (as integer) | |
726 | * @b: divisor | |
727 | * @c: result | |
1da177e4 LT |
728 | * |
729 | * c = a * k / b | |
730 | * | |
731 | * Returns non-zero if the value is changed, zero if not changed. | |
732 | */ | |
877211f5 TI |
733 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
734 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
735 | { |
736 | unsigned int r; | |
737 | if (a->empty || b->empty) { | |
738 | snd_interval_none(c); | |
739 | return; | |
740 | } | |
741 | c->empty = 0; | |
742 | c->min = muldiv32(a->min, k, b->max, &r); | |
743 | c->openmin = (r || a->openmin || b->openmax); | |
744 | if (b->min > 0) { | |
745 | c->max = muldiv32(a->max, k, b->min, &r); | |
746 | if (r) { | |
747 | c->max++; | |
748 | c->openmax = 1; | |
749 | } else | |
750 | c->openmax = (a->openmax || b->openmin); | |
751 | } else { | |
752 | c->max = UINT_MAX; | |
753 | c->openmax = 0; | |
754 | } | |
755 | c->integer = 0; | |
756 | } | |
757 | ||
1da177e4 LT |
758 | /* ---- */ |
759 | ||
760 | ||
761 | /** | |
762 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
763 | * @i: interval to refine |
764 | * @rats_count: number of ratnum_t | |
765 | * @rats: ratnum_t array | |
766 | * @nump: pointer to store the resultant numerator | |
767 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 768 | * |
eb7c06e8 YB |
769 | * Return: Positive if the value is changed, zero if it's not changed, or a |
770 | * negative error code. | |
1da177e4 | 771 | */ |
877211f5 | 772 | int snd_interval_ratnum(struct snd_interval *i, |
e5e113cf | 773 | unsigned int rats_count, const struct snd_ratnum *rats, |
877211f5 | 774 | unsigned int *nump, unsigned int *denp) |
1da177e4 | 775 | { |
8374e24c KH |
776 | unsigned int best_num, best_den; |
777 | int best_diff; | |
1da177e4 | 778 | unsigned int k; |
877211f5 | 779 | struct snd_interval t; |
1da177e4 | 780 | int err; |
8374e24c KH |
781 | unsigned int result_num, result_den; |
782 | int result_diff; | |
1da177e4 LT |
783 | |
784 | best_num = best_den = best_diff = 0; | |
785 | for (k = 0; k < rats_count; ++k) { | |
786 | unsigned int num = rats[k].num; | |
787 | unsigned int den; | |
788 | unsigned int q = i->min; | |
789 | int diff; | |
790 | if (q == 0) | |
791 | q = 1; | |
40962d7c | 792 | den = div_up(num, q); |
1da177e4 LT |
793 | if (den < rats[k].den_min) |
794 | continue; | |
795 | if (den > rats[k].den_max) | |
796 | den = rats[k].den_max; | |
797 | else { | |
798 | unsigned int r; | |
799 | r = (den - rats[k].den_min) % rats[k].den_step; | |
800 | if (r != 0) | |
801 | den -= r; | |
802 | } | |
803 | diff = num - q * den; | |
8374e24c KH |
804 | if (diff < 0) |
805 | diff = -diff; | |
1da177e4 LT |
806 | if (best_num == 0 || |
807 | diff * best_den < best_diff * den) { | |
808 | best_diff = diff; | |
809 | best_den = den; | |
810 | best_num = num; | |
811 | } | |
812 | } | |
813 | if (best_den == 0) { | |
814 | i->empty = 1; | |
815 | return -EINVAL; | |
816 | } | |
817 | t.min = div_down(best_num, best_den); | |
818 | t.openmin = !!(best_num % best_den); | |
819 | ||
8374e24c KH |
820 | result_num = best_num; |
821 | result_diff = best_diff; | |
822 | result_den = best_den; | |
1da177e4 LT |
823 | best_num = best_den = best_diff = 0; |
824 | for (k = 0; k < rats_count; ++k) { | |
825 | unsigned int num = rats[k].num; | |
826 | unsigned int den; | |
827 | unsigned int q = i->max; | |
828 | int diff; | |
829 | if (q == 0) { | |
830 | i->empty = 1; | |
831 | return -EINVAL; | |
832 | } | |
40962d7c | 833 | den = div_down(num, q); |
1da177e4 LT |
834 | if (den > rats[k].den_max) |
835 | continue; | |
836 | if (den < rats[k].den_min) | |
837 | den = rats[k].den_min; | |
838 | else { | |
839 | unsigned int r; | |
840 | r = (den - rats[k].den_min) % rats[k].den_step; | |
841 | if (r != 0) | |
842 | den += rats[k].den_step - r; | |
843 | } | |
844 | diff = q * den - num; | |
8374e24c KH |
845 | if (diff < 0) |
846 | diff = -diff; | |
1da177e4 LT |
847 | if (best_num == 0 || |
848 | diff * best_den < best_diff * den) { | |
849 | best_diff = diff; | |
850 | best_den = den; | |
851 | best_num = num; | |
852 | } | |
853 | } | |
854 | if (best_den == 0) { | |
855 | i->empty = 1; | |
856 | return -EINVAL; | |
857 | } | |
858 | t.max = div_up(best_num, best_den); | |
859 | t.openmax = !!(best_num % best_den); | |
860 | t.integer = 0; | |
861 | err = snd_interval_refine(i, &t); | |
862 | if (err < 0) | |
863 | return err; | |
864 | ||
865 | if (snd_interval_single(i)) { | |
8374e24c KH |
866 | if (best_diff * result_den < result_diff * best_den) { |
867 | result_num = best_num; | |
868 | result_den = best_den; | |
869 | } | |
1da177e4 | 870 | if (nump) |
8374e24c | 871 | *nump = result_num; |
1da177e4 | 872 | if (denp) |
8374e24c | 873 | *denp = result_den; |
1da177e4 LT |
874 | } |
875 | return err; | |
876 | } | |
e88e8ae6 TI |
877 | EXPORT_SYMBOL(snd_interval_ratnum); |
878 | ||
1da177e4 LT |
879 | /** |
880 | * snd_interval_ratden - refine the interval value | |
df8db936 | 881 | * @i: interval to refine |
877211f5 TI |
882 | * @rats_count: number of struct ratden |
883 | * @rats: struct ratden array | |
df8db936 TI |
884 | * @nump: pointer to store the resultant numerator |
885 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 886 | * |
eb7c06e8 YB |
887 | * Return: Positive if the value is changed, zero if it's not changed, or a |
888 | * negative error code. | |
1da177e4 | 889 | */ |
877211f5 | 890 | static int snd_interval_ratden(struct snd_interval *i, |
e5e113cf LPC |
891 | unsigned int rats_count, |
892 | const struct snd_ratden *rats, | |
1da177e4 LT |
893 | unsigned int *nump, unsigned int *denp) |
894 | { | |
895 | unsigned int best_num, best_diff, best_den; | |
896 | unsigned int k; | |
877211f5 | 897 | struct snd_interval t; |
1da177e4 LT |
898 | int err; |
899 | ||
900 | best_num = best_den = best_diff = 0; | |
901 | for (k = 0; k < rats_count; ++k) { | |
902 | unsigned int num; | |
903 | unsigned int den = rats[k].den; | |
904 | unsigned int q = i->min; | |
905 | int diff; | |
906 | num = mul(q, den); | |
907 | if (num > rats[k].num_max) | |
908 | continue; | |
909 | if (num < rats[k].num_min) | |
910 | num = rats[k].num_max; | |
911 | else { | |
912 | unsigned int r; | |
913 | r = (num - rats[k].num_min) % rats[k].num_step; | |
914 | if (r != 0) | |
915 | num += rats[k].num_step - r; | |
916 | } | |
917 | diff = num - q * den; | |
918 | if (best_num == 0 || | |
919 | diff * best_den < best_diff * den) { | |
920 | best_diff = diff; | |
921 | best_den = den; | |
922 | best_num = num; | |
923 | } | |
924 | } | |
925 | if (best_den == 0) { | |
926 | i->empty = 1; | |
927 | return -EINVAL; | |
928 | } | |
929 | t.min = div_down(best_num, best_den); | |
930 | t.openmin = !!(best_num % best_den); | |
931 | ||
932 | best_num = best_den = best_diff = 0; | |
933 | for (k = 0; k < rats_count; ++k) { | |
934 | unsigned int num; | |
935 | unsigned int den = rats[k].den; | |
936 | unsigned int q = i->max; | |
937 | int diff; | |
938 | num = mul(q, den); | |
939 | if (num < rats[k].num_min) | |
940 | continue; | |
941 | if (num > rats[k].num_max) | |
942 | num = rats[k].num_max; | |
943 | else { | |
944 | unsigned int r; | |
945 | r = (num - rats[k].num_min) % rats[k].num_step; | |
946 | if (r != 0) | |
947 | num -= r; | |
948 | } | |
949 | diff = q * den - num; | |
950 | if (best_num == 0 || | |
951 | diff * best_den < best_diff * den) { | |
952 | best_diff = diff; | |
953 | best_den = den; | |
954 | best_num = num; | |
955 | } | |
956 | } | |
957 | if (best_den == 0) { | |
958 | i->empty = 1; | |
959 | return -EINVAL; | |
960 | } | |
961 | t.max = div_up(best_num, best_den); | |
962 | t.openmax = !!(best_num % best_den); | |
963 | t.integer = 0; | |
964 | err = snd_interval_refine(i, &t); | |
965 | if (err < 0) | |
966 | return err; | |
967 | ||
968 | if (snd_interval_single(i)) { | |
969 | if (nump) | |
970 | *nump = best_num; | |
971 | if (denp) | |
972 | *denp = best_den; | |
973 | } | |
974 | return err; | |
975 | } | |
976 | ||
977 | /** | |
978 | * snd_interval_list - refine the interval value from the list | |
979 | * @i: the interval value to refine | |
980 | * @count: the number of elements in the list | |
981 | * @list: the value list | |
982 | * @mask: the bit-mask to evaluate | |
983 | * | |
984 | * Refines the interval value from the list. | |
985 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
986 | * evaluated. | |
987 | * | |
eb7c06e8 YB |
988 | * Return: Positive if the value is changed, zero if it's not changed, or a |
989 | * negative error code. | |
1da177e4 | 990 | */ |
4af87a93 MB |
991 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
992 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
993 | { |
994 | unsigned int k; | |
b1ddaf68 | 995 | struct snd_interval list_range; |
0981a260 TI |
996 | |
997 | if (!count) { | |
998 | i->empty = 1; | |
999 | return -EINVAL; | |
1000 | } | |
b1ddaf68 CL |
1001 | snd_interval_any(&list_range); |
1002 | list_range.min = UINT_MAX; | |
1003 | list_range.max = 0; | |
1da177e4 LT |
1004 | for (k = 0; k < count; k++) { |
1005 | if (mask && !(mask & (1 << k))) | |
1006 | continue; | |
b1ddaf68 | 1007 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1008 | continue; |
b1ddaf68 CL |
1009 | list_range.min = min(list_range.min, list[k]); |
1010 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1011 | } |
b1ddaf68 | 1012 | return snd_interval_refine(i, &list_range); |
1da177e4 | 1013 | } |
e88e8ae6 TI |
1014 | EXPORT_SYMBOL(snd_interval_list); |
1015 | ||
f66f898e PR |
1016 | /** |
1017 | * snd_interval_ranges - refine the interval value from the list of ranges | |
1018 | * @i: the interval value to refine | |
1019 | * @count: the number of elements in the list of ranges | |
1020 | * @ranges: the ranges list | |
1021 | * @mask: the bit-mask to evaluate | |
1022 | * | |
1023 | * Refines the interval value from the list of ranges. | |
1024 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1025 | * evaluated. | |
1026 | * | |
1027 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1028 | * negative error code. | |
1029 | */ | |
1030 | int snd_interval_ranges(struct snd_interval *i, unsigned int count, | |
1031 | const struct snd_interval *ranges, unsigned int mask) | |
1032 | { | |
1033 | unsigned int k; | |
1034 | struct snd_interval range_union; | |
1035 | struct snd_interval range; | |
1036 | ||
1037 | if (!count) { | |
1038 | snd_interval_none(i); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | snd_interval_any(&range_union); | |
1042 | range_union.min = UINT_MAX; | |
1043 | range_union.max = 0; | |
1044 | for (k = 0; k < count; k++) { | |
1045 | if (mask && !(mask & (1 << k))) | |
1046 | continue; | |
1047 | snd_interval_copy(&range, &ranges[k]); | |
1048 | if (snd_interval_refine(&range, i) < 0) | |
1049 | continue; | |
1050 | if (snd_interval_empty(&range)) | |
1051 | continue; | |
1052 | ||
1053 | if (range.min < range_union.min) { | |
1054 | range_union.min = range.min; | |
1055 | range_union.openmin = 1; | |
1056 | } | |
1057 | if (range.min == range_union.min && !range.openmin) | |
1058 | range_union.openmin = 0; | |
1059 | if (range.max > range_union.max) { | |
1060 | range_union.max = range.max; | |
1061 | range_union.openmax = 1; | |
1062 | } | |
1063 | if (range.max == range_union.max && !range.openmax) | |
1064 | range_union.openmax = 0; | |
1065 | } | |
1066 | return snd_interval_refine(i, &range_union); | |
1067 | } | |
1068 | EXPORT_SYMBOL(snd_interval_ranges); | |
1069 | ||
0f519b62 | 1070 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1071 | { |
1072 | unsigned int n; | |
1073 | int changed = 0; | |
0f519b62 | 1074 | n = i->min % step; |
1da177e4 LT |
1075 | if (n != 0 || i->openmin) { |
1076 | i->min += step - n; | |
df1e4719 | 1077 | i->openmin = 0; |
1da177e4 LT |
1078 | changed = 1; |
1079 | } | |
0f519b62 | 1080 | n = i->max % step; |
1da177e4 LT |
1081 | if (n != 0 || i->openmax) { |
1082 | i->max -= n; | |
df1e4719 | 1083 | i->openmax = 0; |
1da177e4 LT |
1084 | changed = 1; |
1085 | } | |
1086 | if (snd_interval_checkempty(i)) { | |
1087 | i->empty = 1; | |
1088 | return -EINVAL; | |
1089 | } | |
1090 | return changed; | |
1091 | } | |
1092 | ||
1093 | /* Info constraints helpers */ | |
1094 | ||
1095 | /** | |
1096 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1097 | * @runtime: the pcm runtime instance | |
1098 | * @cond: condition bits | |
1099 | * @var: the variable to evaluate | |
1100 | * @func: the evaluation function | |
1101 | * @private: the private data pointer passed to function | |
1102 | * @dep: the dependent variables | |
1103 | * | |
eb7c06e8 | 1104 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1105 | */ |
877211f5 | 1106 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1107 | int var, |
1108 | snd_pcm_hw_rule_func_t func, void *private, | |
1109 | int dep, ...) | |
1110 | { | |
877211f5 TI |
1111 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1112 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1113 | unsigned int k; |
1114 | va_list args; | |
1115 | va_start(args, dep); | |
1116 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1117 | struct snd_pcm_hw_rule *new; |
1da177e4 | 1118 | unsigned int new_rules = constrs->rules_all + 16; |
64f0bd11 BG |
1119 | new = krealloc_array(constrs->rules, new_rules, |
1120 | sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1121 | if (!new) { |
1122 | va_end(args); | |
1da177e4 | 1123 | return -ENOMEM; |
87a1c8aa | 1124 | } |
1da177e4 LT |
1125 | constrs->rules = new; |
1126 | constrs->rules_all = new_rules; | |
1127 | } | |
1128 | c = &constrs->rules[constrs->rules_num]; | |
1129 | c->cond = cond; | |
1130 | c->func = func; | |
1131 | c->var = var; | |
1132 | c->private = private; | |
1133 | k = 0; | |
1134 | while (1) { | |
87a1c8aa JJ |
1135 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1136 | va_end(args); | |
7eaa943c | 1137 | return -EINVAL; |
87a1c8aa | 1138 | } |
1da177e4 LT |
1139 | c->deps[k++] = dep; |
1140 | if (dep < 0) | |
1141 | break; | |
1142 | dep = va_arg(args, int); | |
1143 | } | |
1144 | constrs->rules_num++; | |
1145 | va_end(args); | |
1146 | return 0; | |
87a1c8aa | 1147 | } |
e88e8ae6 TI |
1148 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1149 | ||
1da177e4 | 1150 | /** |
1c85cc64 | 1151 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1152 | * @runtime: PCM runtime instance |
1153 | * @var: hw_params variable to apply the mask | |
1154 | * @mask: the bitmap mask | |
1155 | * | |
1c85cc64 | 1156 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1157 | * |
1158 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1159 | */ |
877211f5 | 1160 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1161 | u_int32_t mask) |
1162 | { | |
877211f5 TI |
1163 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1164 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1165 | *maskp->bits &= mask; |
1166 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1167 | if (*maskp->bits == 0) | |
1168 | return -EINVAL; | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | /** | |
1c85cc64 | 1173 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1174 | * @runtime: PCM runtime instance |
1175 | * @var: hw_params variable to apply the mask | |
1176 | * @mask: the 64bit bitmap mask | |
1177 | * | |
1c85cc64 | 1178 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1179 | * |
1180 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1181 | */ |
877211f5 | 1182 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1183 | u_int64_t mask) |
1184 | { | |
877211f5 TI |
1185 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1186 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1187 | maskp->bits[0] &= (u_int32_t)mask; |
1188 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1189 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1190 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1191 | return -EINVAL; | |
1192 | return 0; | |
1193 | } | |
63a5d4c6 | 1194 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1195 | |
1196 | /** | |
1c85cc64 | 1197 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1198 | * @runtime: PCM runtime instance |
1199 | * @var: hw_params variable to apply the integer constraint | |
1200 | * | |
1201 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1202 | * |
1203 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1204 | * negative error code. | |
1da177e4 | 1205 | */ |
877211f5 | 1206 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1207 | { |
877211f5 | 1208 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1209 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1210 | } | |
e88e8ae6 TI |
1211 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1212 | ||
1da177e4 | 1213 | /** |
1c85cc64 | 1214 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1215 | * @runtime: PCM runtime instance |
1216 | * @var: hw_params variable to apply the range | |
1217 | * @min: the minimal value | |
1218 | * @max: the maximal value | |
1219 | * | |
1220 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1221 | * |
1222 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1223 | * negative error code. | |
1da177e4 | 1224 | */ |
877211f5 | 1225 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1226 | unsigned int min, unsigned int max) |
1227 | { | |
877211f5 TI |
1228 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1229 | struct snd_interval t; | |
1da177e4 LT |
1230 | t.min = min; |
1231 | t.max = max; | |
1232 | t.openmin = t.openmax = 0; | |
1233 | t.integer = 0; | |
1234 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1235 | } | |
e88e8ae6 TI |
1236 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1237 | ||
877211f5 TI |
1238 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1239 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1240 | { |
877211f5 | 1241 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1242 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1243 | } | |
1244 | ||
1245 | ||
1246 | /** | |
1c85cc64 | 1247 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1248 | * @runtime: PCM runtime instance |
1249 | * @cond: condition bits | |
1250 | * @var: hw_params variable to apply the list constraint | |
1251 | * @l: list | |
1252 | * | |
1253 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1254 | * |
1255 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1256 | */ |
877211f5 | 1257 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1258 | unsigned int cond, |
1259 | snd_pcm_hw_param_t var, | |
1464189f | 1260 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1261 | { |
1262 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1263 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1264 | var, -1); |
1265 | } | |
e88e8ae6 TI |
1266 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1267 | ||
f66f898e PR |
1268 | static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, |
1269 | struct snd_pcm_hw_rule *rule) | |
1270 | { | |
1271 | struct snd_pcm_hw_constraint_ranges *r = rule->private; | |
1272 | return snd_interval_ranges(hw_param_interval(params, rule->var), | |
1273 | r->count, r->ranges, r->mask); | |
1274 | } | |
1275 | ||
1276 | ||
1277 | /** | |
1278 | * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter | |
1279 | * @runtime: PCM runtime instance | |
1280 | * @cond: condition bits | |
1281 | * @var: hw_params variable to apply the list of range constraints | |
1282 | * @r: ranges | |
1283 | * | |
1284 | * Apply the list of range constraints to an interval parameter. | |
1285 | * | |
1286 | * Return: Zero if successful, or a negative error code on failure. | |
1287 | */ | |
1288 | int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, | |
1289 | unsigned int cond, | |
1290 | snd_pcm_hw_param_t var, | |
1291 | const struct snd_pcm_hw_constraint_ranges *r) | |
1292 | { | |
1293 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1294 | snd_pcm_hw_rule_ranges, (void *)r, | |
1295 | var, -1); | |
1296 | } | |
1297 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); | |
1298 | ||
877211f5 TI |
1299 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1300 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1301 | { |
e5e113cf | 1302 | const struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1303 | unsigned int num = 0, den = 0; |
1304 | int err; | |
1305 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1306 | r->nrats, r->rats, &num, &den); | |
1307 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1308 | params->rate_num = num; | |
1309 | params->rate_den = den; | |
1310 | } | |
1311 | return err; | |
1312 | } | |
1313 | ||
1314 | /** | |
1c85cc64 | 1315 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1316 | * @runtime: PCM runtime instance |
1317 | * @cond: condition bits | |
1318 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1319 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1320 | * |
1321 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1322 | */ |
877211f5 | 1323 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1324 | unsigned int cond, |
1325 | snd_pcm_hw_param_t var, | |
e5e113cf | 1326 | const struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1327 | { |
1328 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1329 | snd_pcm_hw_rule_ratnums, (void *)r, |
1da177e4 LT |
1330 | var, -1); |
1331 | } | |
e88e8ae6 TI |
1332 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1333 | ||
877211f5 TI |
1334 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1335 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1336 | { |
e5e113cf | 1337 | const struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1338 | unsigned int num = 0, den = 0; |
1339 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1340 | r->nrats, r->rats, &num, &den); | |
1341 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1342 | params->rate_num = num; | |
1343 | params->rate_den = den; | |
1344 | } | |
1345 | return err; | |
1346 | } | |
1347 | ||
1348 | /** | |
1c85cc64 | 1349 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1350 | * @runtime: PCM runtime instance |
1351 | * @cond: condition bits | |
1352 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1353 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1354 | * |
1355 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1356 | */ |
877211f5 | 1357 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1358 | unsigned int cond, |
1359 | snd_pcm_hw_param_t var, | |
e5e113cf | 1360 | const struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1361 | { |
1362 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
e5e113cf | 1363 | snd_pcm_hw_rule_ratdens, (void *)r, |
1da177e4 LT |
1364 | var, -1); |
1365 | } | |
e88e8ae6 TI |
1366 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1367 | ||
877211f5 TI |
1368 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1369 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1370 | { |
1371 | unsigned int l = (unsigned long) rule->private; | |
1372 | int width = l & 0xffff; | |
1373 | unsigned int msbits = l >> 16; | |
b55f9fdc TS |
1374 | const struct snd_interval *i = |
1375 | hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); | |
8ef9df55 LPC |
1376 | |
1377 | if (!snd_interval_single(i)) | |
1378 | return 0; | |
1379 | ||
1380 | if ((snd_interval_value(i) == width) || | |
1381 | (width == 0 && snd_interval_value(i) > msbits)) | |
19f52fae | 1382 | params->msbits = min_not_zero(params->msbits, msbits); |
8ef9df55 | 1383 | |
1da177e4 LT |
1384 | return 0; |
1385 | } | |
1386 | ||
1387 | /** | |
1c85cc64 | 1388 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1389 | * @runtime: PCM runtime instance |
1390 | * @cond: condition bits | |
1391 | * @width: sample bits width | |
1392 | * @msbits: msbits width | |
eb7c06e8 | 1393 | * |
8ef9df55 LPC |
1394 | * This constraint will set the number of most significant bits (msbits) if a |
1395 | * sample format with the specified width has been select. If width is set to 0 | |
1396 | * the msbits will be set for any sample format with a width larger than the | |
1397 | * specified msbits. | |
1398 | * | |
eb7c06e8 | 1399 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1400 | */ |
877211f5 | 1401 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1402 | unsigned int cond, |
1403 | unsigned int width, | |
1404 | unsigned int msbits) | |
1405 | { | |
1406 | unsigned long l = (msbits << 16) | width; | |
1407 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1408 | snd_pcm_hw_rule_msbits, | |
1409 | (void*) l, | |
1410 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1411 | } | |
e88e8ae6 TI |
1412 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1413 | ||
877211f5 TI |
1414 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1415 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1416 | { |
1417 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1418 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1419 | } |
1420 | ||
1421 | /** | |
1c85cc64 | 1422 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1423 | * @runtime: PCM runtime instance |
1424 | * @cond: condition bits | |
1425 | * @var: hw_params variable to apply the step constraint | |
1426 | * @step: step size | |
eb7c06e8 YB |
1427 | * |
1428 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1429 | */ |
877211f5 | 1430 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1431 | unsigned int cond, |
1432 | snd_pcm_hw_param_t var, | |
1433 | unsigned long step) | |
1434 | { | |
1435 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1436 | snd_pcm_hw_rule_step, (void *) step, | |
1437 | var, -1); | |
1438 | } | |
e88e8ae6 TI |
1439 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1440 | ||
877211f5 | 1441 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1442 | { |
d03af9b8 | 1443 | static const unsigned int pow2_sizes[] = { |
1da177e4 LT |
1444 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1445 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1446 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1447 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1448 | }; | |
1449 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1450 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1451 | } | |
1452 | ||
1453 | /** | |
1c85cc64 | 1454 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1455 | * @runtime: PCM runtime instance |
1456 | * @cond: condition bits | |
1457 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1458 | * |
1459 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1460 | */ |
877211f5 | 1461 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1462 | unsigned int cond, |
1463 | snd_pcm_hw_param_t var) | |
1464 | { | |
1465 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1466 | snd_pcm_hw_rule_pow2, NULL, | |
1467 | var, -1); | |
1468 | } | |
e88e8ae6 TI |
1469 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1470 | ||
d5b702a6 CL |
1471 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1472 | struct snd_pcm_hw_rule *rule) | |
1473 | { | |
1474 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1475 | struct snd_interval *rate; | |
1476 | ||
1477 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1478 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1479 | } | |
1480 | ||
1481 | /** | |
1482 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1483 | * @runtime: PCM runtime instance | |
1484 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1485 | * |
1486 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1487 | */ |
1488 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1489 | unsigned int base_rate) | |
1490 | { | |
1491 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1492 | SNDRV_PCM_HW_PARAM_RATE, | |
1493 | snd_pcm_hw_rule_noresample_func, | |
1494 | (void *)(uintptr_t)base_rate, | |
1495 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1496 | } | |
1497 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1498 | ||
877211f5 | 1499 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1500 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1501 | { |
1502 | if (hw_is_mask(var)) { | |
1503 | snd_mask_any(hw_param_mask(params, var)); | |
1504 | params->cmask |= 1 << var; | |
1505 | params->rmask |= 1 << var; | |
1506 | return; | |
1507 | } | |
1508 | if (hw_is_interval(var)) { | |
1509 | snd_interval_any(hw_param_interval(params, var)); | |
1510 | params->cmask |= 1 << var; | |
1511 | params->rmask |= 1 << var; | |
1512 | return; | |
1513 | } | |
1514 | snd_BUG(); | |
1515 | } | |
1516 | ||
877211f5 | 1517 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1518 | { |
1519 | unsigned int k; | |
1520 | memset(params, 0, sizeof(*params)); | |
1521 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1522 | _snd_pcm_hw_param_any(params, k); | |
1523 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1524 | _snd_pcm_hw_param_any(params, k); | |
1525 | params->info = ~0U; | |
1526 | } | |
e88e8ae6 | 1527 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1528 | |
1529 | /** | |
1c85cc64 | 1530 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1531 | * @params: the hw_params instance |
1532 | * @var: parameter to retrieve | |
1c85cc64 | 1533 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1534 | * |
eb7c06e8 YB |
1535 | * Return: The value for field @var if it's fixed in configuration space |
1536 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1537 | */ |
e88e8ae6 TI |
1538 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1539 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1540 | { |
1541 | if (hw_is_mask(var)) { | |
877211f5 | 1542 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1543 | if (!snd_mask_single(mask)) |
1544 | return -EINVAL; | |
1545 | if (dir) | |
1546 | *dir = 0; | |
1547 | return snd_mask_value(mask); | |
1548 | } | |
1549 | if (hw_is_interval(var)) { | |
877211f5 | 1550 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1551 | if (!snd_interval_single(i)) |
1552 | return -EINVAL; | |
1553 | if (dir) | |
1554 | *dir = i->openmin; | |
1555 | return snd_interval_value(i); | |
1556 | } | |
1da177e4 LT |
1557 | return -EINVAL; |
1558 | } | |
e88e8ae6 | 1559 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1560 | |
877211f5 | 1561 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1562 | snd_pcm_hw_param_t var) |
1563 | { | |
1564 | if (hw_is_mask(var)) { | |
1565 | snd_mask_none(hw_param_mask(params, var)); | |
1566 | params->cmask |= 1 << var; | |
1567 | params->rmask |= 1 << var; | |
1568 | } else if (hw_is_interval(var)) { | |
1569 | snd_interval_none(hw_param_interval(params, var)); | |
1570 | params->cmask |= 1 << var; | |
1571 | params->rmask |= 1 << var; | |
1572 | } else { | |
1573 | snd_BUG(); | |
1574 | } | |
1575 | } | |
e88e8ae6 | 1576 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1577 | |
877211f5 | 1578 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1579 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1580 | { |
1581 | int changed; | |
1582 | if (hw_is_mask(var)) | |
1583 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1584 | else if (hw_is_interval(var)) | |
1585 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1586 | else |
1da177e4 | 1587 | return -EINVAL; |
7a0a8716 | 1588 | if (changed > 0) { |
1da177e4 LT |
1589 | params->cmask |= 1 << var; |
1590 | params->rmask |= 1 << var; | |
1591 | } | |
1592 | return changed; | |
1593 | } | |
1594 | ||
1595 | ||
1596 | /** | |
1c85cc64 | 1597 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1598 | * @pcm: PCM instance |
1599 | * @params: the hw_params instance | |
1600 | * @var: parameter to retrieve | |
1c85cc64 | 1601 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1602 | * |
1c85cc64 | 1603 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1604 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1605 | * |
1606 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1607 | */ |
e88e8ae6 TI |
1608 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1609 | struct snd_pcm_hw_params *params, | |
1610 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1611 | { |
1612 | int changed = _snd_pcm_hw_param_first(params, var); | |
1613 | if (changed < 0) | |
1614 | return changed; | |
1615 | if (params->rmask) { | |
1616 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1617 | if (err < 0) |
7eaa943c | 1618 | return err; |
1da177e4 LT |
1619 | } |
1620 | return snd_pcm_hw_param_value(params, var, dir); | |
1621 | } | |
e88e8ae6 TI |
1622 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1623 | ||
877211f5 | 1624 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1625 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1626 | { |
1627 | int changed; | |
1628 | if (hw_is_mask(var)) | |
1629 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1630 | else if (hw_is_interval(var)) | |
1631 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1632 | else |
1da177e4 | 1633 | return -EINVAL; |
7a0a8716 | 1634 | if (changed > 0) { |
1da177e4 LT |
1635 | params->cmask |= 1 << var; |
1636 | params->rmask |= 1 << var; | |
1637 | } | |
1638 | return changed; | |
1639 | } | |
1640 | ||
1641 | ||
1642 | /** | |
1c85cc64 | 1643 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1644 | * @pcm: PCM instance |
1645 | * @params: the hw_params instance | |
1646 | * @var: parameter to retrieve | |
1c85cc64 | 1647 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1648 | * |
1c85cc64 | 1649 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1650 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1651 | * |
1652 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1653 | */ |
e88e8ae6 TI |
1654 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1655 | struct snd_pcm_hw_params *params, | |
1656 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1657 | { |
1658 | int changed = _snd_pcm_hw_param_last(params, var); | |
1659 | if (changed < 0) | |
1660 | return changed; | |
1661 | if (params->rmask) { | |
1662 | int err = snd_pcm_hw_refine(pcm, params); | |
fe08f34d | 1663 | if (err < 0) |
7eaa943c | 1664 | return err; |
1da177e4 LT |
1665 | } |
1666 | return snd_pcm_hw_param_value(params, var, dir); | |
1667 | } | |
e88e8ae6 | 1668 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 | 1669 | |
877211f5 | 1670 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1671 | void *arg) |
1672 | { | |
877211f5 | 1673 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1674 | unsigned long flags; |
1675 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1676 | if (snd_pcm_running(substream) && | |
1677 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1678 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1679 | else { |
1da177e4 | 1680 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1681 | runtime->hw_ptr_wrap = 0; |
1682 | } | |
1da177e4 LT |
1683 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1684 | return 0; | |
1685 | } | |
1686 | ||
877211f5 | 1687 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1688 | void *arg) |
1689 | { | |
877211f5 TI |
1690 | struct snd_pcm_channel_info *info = arg; |
1691 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1692 | int width; |
1693 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1694 | info->offset = -1; | |
1695 | return 0; | |
1696 | } | |
1697 | width = snd_pcm_format_physical_width(runtime->format); | |
1698 | if (width < 0) | |
1699 | return width; | |
1700 | info->offset = 0; | |
1701 | switch (runtime->access) { | |
1702 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1703 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1704 | info->first = info->channel * width; | |
1705 | info->step = runtime->channels * width; | |
1706 | break; | |
1707 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1708 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1709 | { | |
1710 | size_t size = runtime->dma_bytes / runtime->channels; | |
1711 | info->first = info->channel * size * 8; | |
1712 | info->step = width; | |
1713 | break; | |
1714 | } | |
1715 | default: | |
1716 | snd_BUG(); | |
1717 | break; | |
1718 | } | |
1719 | return 0; | |
1720 | } | |
1721 | ||
8bea869c JK |
1722 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1723 | void *arg) | |
1724 | { | |
1725 | struct snd_pcm_hw_params *params = arg; | |
1726 | snd_pcm_format_t format; | |
a9960e6a CL |
1727 | int channels; |
1728 | ssize_t frame_size; | |
8bea869c JK |
1729 | |
1730 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1731 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1732 | format = params_format(params); | |
1733 | channels = params_channels(params); | |
a9960e6a CL |
1734 | frame_size = snd_pcm_format_size(format, channels); |
1735 | if (frame_size > 0) | |
f3eef46f | 1736 | params->fifo_size /= frame_size; |
8bea869c JK |
1737 | } |
1738 | return 0; | |
1739 | } | |
1740 | ||
1da177e4 LT |
1741 | /** |
1742 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1743 | * @substream: the pcm substream instance | |
1744 | * @cmd: ioctl command | |
1745 | * @arg: ioctl argument | |
1746 | * | |
1747 | * Processes the generic ioctl commands for PCM. | |
1748 | * Can be passed as the ioctl callback for PCM ops. | |
1749 | * | |
eb7c06e8 | 1750 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1751 | */ |
877211f5 | 1752 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1753 | unsigned int cmd, void *arg) |
1754 | { | |
1755 | switch (cmd) { | |
1da177e4 LT |
1756 | case SNDRV_PCM_IOCTL1_RESET: |
1757 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1758 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1759 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1760 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1761 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1762 | } |
1763 | return -ENXIO; | |
1764 | } | |
e88e8ae6 TI |
1765 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1766 | ||
1da177e4 | 1767 | /** |
47271b1b TS |
1768 | * snd_pcm_period_elapsed_under_stream_lock() - update the status of runtime for the next period |
1769 | * under acquired lock of PCM substream. | |
1770 | * @substream: the instance of pcm substream. | |
1771 | * | |
1772 | * This function is called when the batch of audio data frames as the same size as the period of | |
1773 | * buffer is already processed in audio data transmission. | |
1774 | * | |
1775 | * The call of function updates the status of runtime with the latest position of audio data | |
1776 | * transmission, checks overrun and underrun over buffer, awaken user processes from waiting for | |
1777 | * available audio data frames, sampling audio timestamp, and performs stop or drain the PCM | |
1778 | * substream according to configured threshold. | |
1779 | * | |
1780 | * The function is intended to use for the case that PCM driver operates audio data frames under | |
1781 | * acquired lock of PCM substream; e.g. in callback of any operation of &snd_pcm_ops in process | |
1782 | * context. In any interrupt context, it's preferrable to use ``snd_pcm_period_elapsed()`` instead | |
1783 | * since lock of PCM substream should be acquired in advance. | |
1da177e4 | 1784 | * |
47271b1b TS |
1785 | * Developer should pay enough attention that some callbacks in &snd_pcm_ops are done by the call of |
1786 | * function: | |
1da177e4 | 1787 | * |
47271b1b TS |
1788 | * - .pointer - to retrieve current position of audio data transmission by frame count or XRUN state. |
1789 | * - .trigger - with SNDRV_PCM_TRIGGER_STOP at XRUN or DRAINING state. | |
1790 | * - .get_time_info - to retrieve audio time stamp if needed. | |
1791 | * | |
1792 | * Even if more than one periods have elapsed since the last call, you have to call this only once. | |
1da177e4 | 1793 | */ |
47271b1b | 1794 | void snd_pcm_period_elapsed_under_stream_lock(struct snd_pcm_substream *substream) |
1da177e4 | 1795 | { |
877211f5 | 1796 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1797 | |
f5cdc9d4 | 1798 | if (PCM_RUNTIME_CHECK(substream)) |
47271b1b | 1799 | return; |
f5cdc9d4 | 1800 | runtime = substream->runtime; |
1801 | ||
1da177e4 | 1802 | if (!snd_pcm_running(substream) || |
f240406b | 1803 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1804 | goto _end; |
1805 | ||
90bbaf66 | 1806 | #ifdef CONFIG_SND_PCM_TIMER |
1da177e4 LT |
1807 | if (substream->timer_running) |
1808 | snd_timer_interrupt(substream->timer, 1); | |
90bbaf66 | 1809 | #endif |
1da177e4 | 1810 | _end: |
96b09709 | 1811 | snd_kill_fasync(runtime->fasync, SIGIO, POLL_IN); |
47271b1b TS |
1812 | } |
1813 | EXPORT_SYMBOL(snd_pcm_period_elapsed_under_stream_lock); | |
1814 | ||
1815 | /** | |
1816 | * snd_pcm_period_elapsed() - update the status of runtime for the next period by acquiring lock of | |
1817 | * PCM substream. | |
1818 | * @substream: the instance of PCM substream. | |
1819 | * | |
1820 | * This function is mostly similar to ``snd_pcm_period_elapsed_under_stream_lock()`` except for | |
1821 | * acquiring lock of PCM substream voluntarily. | |
1822 | * | |
1823 | * It's typically called by any type of IRQ handler when hardware IRQ occurs to notify event that | |
1824 | * the batch of audio data frames as the same size as the period of buffer is already processed in | |
1825 | * audio data transmission. | |
1826 | */ | |
1827 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) | |
1828 | { | |
1829 | unsigned long flags; | |
1830 | ||
1831 | if (snd_BUG_ON(!substream)) | |
1832 | return; | |
1833 | ||
1834 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1835 | snd_pcm_period_elapsed_under_stream_lock(substream); | |
3aa02cb6 | 1836 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1da177e4 | 1837 | } |
e88e8ae6 TI |
1838 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1839 | ||
13075510 TI |
1840 | /* |
1841 | * Wait until avail_min data becomes available | |
1842 | * Returns a negative error code if any error occurs during operation. | |
1843 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1844 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1845 | */ | |
5daeba34 | 1846 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1847 | snd_pcm_uframes_t *availp) |
1848 | { | |
1849 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1850 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
ac6424b9 | 1851 | wait_queue_entry_t wait; |
13075510 TI |
1852 | int err = 0; |
1853 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1854 | long wait_time, tout; |
1855 | ||
763437a9 AV |
1856 | init_waitqueue_entry(&wait, current); |
1857 | set_current_state(TASK_INTERRUPTIBLE); | |
1858 | add_wait_queue(&runtime->tsleep, &wait); | |
1859 | ||
f2b3614c TI |
1860 | if (runtime->no_period_wakeup) |
1861 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1862 | else { | |
d64c5cf8 LG |
1863 | /* use wait time from substream if available */ |
1864 | if (substream->wait_time) { | |
1865 | wait_time = substream->wait_time; | |
1866 | } else { | |
3ed2b549 | 1867 | wait_time = 100; |
d64c5cf8 LG |
1868 | |
1869 | if (runtime->rate) { | |
3ed2b549 | 1870 | long t = runtime->buffer_size * 1100 / runtime->rate; |
d64c5cf8 LG |
1871 | wait_time = max(t, wait_time); |
1872 | } | |
f2b3614c | 1873 | } |
3ed2b549 | 1874 | wait_time = msecs_to_jiffies(wait_time); |
f2b3614c | 1875 | } |
763437a9 | 1876 | |
13075510 TI |
1877 | for (;;) { |
1878 | if (signal_pending(current)) { | |
1879 | err = -ERESTARTSYS; | |
1880 | break; | |
1881 | } | |
763437a9 AV |
1882 | |
1883 | /* | |
1884 | * We need to check if space became available already | |
1885 | * (and thus the wakeup happened already) first to close | |
1886 | * the race of space already having become available. | |
1887 | * This check must happen after been added to the waitqueue | |
1888 | * and having current state be INTERRUPTIBLE. | |
1889 | */ | |
763e5067 | 1890 | avail = snd_pcm_avail(substream); |
763437a9 AV |
1891 | if (avail >= runtime->twake) |
1892 | break; | |
13075510 | 1893 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1894 | |
1895 | tout = schedule_timeout(wait_time); | |
1896 | ||
13075510 | 1897 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1898 | set_current_state(TASK_INTERRUPTIBLE); |
f0061c18 | 1899 | switch (runtime->state) { |
13075510 TI |
1900 | case SNDRV_PCM_STATE_SUSPENDED: |
1901 | err = -ESTRPIPE; | |
1902 | goto _endloop; | |
1903 | case SNDRV_PCM_STATE_XRUN: | |
1904 | err = -EPIPE; | |
1905 | goto _endloop; | |
1906 | case SNDRV_PCM_STATE_DRAINING: | |
1907 | if (is_playback) | |
1908 | err = -EPIPE; | |
1909 | else | |
1910 | avail = 0; /* indicate draining */ | |
1911 | goto _endloop; | |
1912 | case SNDRV_PCM_STATE_OPEN: | |
1913 | case SNDRV_PCM_STATE_SETUP: | |
1914 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1915 | err = -EBADFD; | |
1916 | goto _endloop; | |
ed697e1a JK |
1917 | case SNDRV_PCM_STATE_PAUSED: |
1918 | continue; | |
13075510 TI |
1919 | } |
1920 | if (!tout) { | |
09e56df8 | 1921 | pcm_dbg(substream->pcm, |
3ed2b549 OB |
1922 | "%s timeout (DMA or IRQ trouble?)\n", |
1923 | is_playback ? "playback write" : "capture read"); | |
13075510 TI |
1924 | err = -EIO; |
1925 | break; | |
1926 | } | |
13075510 TI |
1927 | } |
1928 | _endloop: | |
763437a9 | 1929 | set_current_state(TASK_RUNNING); |
c91a988d | 1930 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1931 | *availp = avail; |
1932 | return err; | |
1933 | } | |
1934 | ||
9f600630 TI |
1935 | typedef int (*pcm_transfer_f)(struct snd_pcm_substream *substream, |
1936 | int channel, unsigned long hwoff, | |
1937 | void *buf, unsigned long bytes); | |
bdc4acf7 | 1938 | |
9f600630 TI |
1939 | typedef int (*pcm_copy_f)(struct snd_pcm_substream *, snd_pcm_uframes_t, void *, |
1940 | snd_pcm_uframes_t, snd_pcm_uframes_t, pcm_transfer_f); | |
1941 | ||
1942 | /* calculate the target DMA-buffer position to be written/read */ | |
1943 | static void *get_dma_ptr(struct snd_pcm_runtime *runtime, | |
1944 | int channel, unsigned long hwoff) | |
1da177e4 | 1945 | { |
9f600630 TI |
1946 | return runtime->dma_area + hwoff + |
1947 | channel * (runtime->dma_bytes / runtime->channels); | |
1948 | } | |
1949 | ||
5c7264cf TI |
1950 | /* default copy_user ops for write; used for both interleaved and non- modes */ |
1951 | static int default_write_copy(struct snd_pcm_substream *substream, | |
1952 | int channel, unsigned long hwoff, | |
1953 | void *buf, unsigned long bytes) | |
9f600630 TI |
1954 | { |
1955 | if (copy_from_user(get_dma_ptr(substream->runtime, channel, hwoff), | |
5c7264cf | 1956 | (void __user *)buf, bytes)) |
9f600630 TI |
1957 | return -EFAULT; |
1958 | return 0; | |
1959 | } | |
1960 | ||
68541213 TI |
1961 | /* default copy_kernel ops for write */ |
1962 | static int default_write_copy_kernel(struct snd_pcm_substream *substream, | |
1963 | int channel, unsigned long hwoff, | |
1964 | void *buf, unsigned long bytes) | |
1965 | { | |
1966 | memcpy(get_dma_ptr(substream->runtime, channel, hwoff), buf, bytes); | |
1da177e4 LT |
1967 | return 0; |
1968 | } | |
1da177e4 | 1969 | |
9f600630 TI |
1970 | /* fill silence instead of copy data; called as a transfer helper |
1971 | * from __snd_pcm_lib_write() or directly from noninterleaved_copy() when | |
1972 | * a NULL buffer is passed | |
1973 | */ | |
1974 | static int fill_silence(struct snd_pcm_substream *substream, int channel, | |
1975 | unsigned long hwoff, void *buf, unsigned long bytes) | |
1da177e4 | 1976 | { |
877211f5 | 1977 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 1978 | |
9f600630 | 1979 | if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) |
1da177e4 | 1980 | return 0; |
9f600630 TI |
1981 | if (substream->ops->fill_silence) |
1982 | return substream->ops->fill_silence(substream, channel, | |
1983 | hwoff, bytes); | |
1da177e4 | 1984 | |
9f600630 TI |
1985 | snd_pcm_format_set_silence(runtime->format, |
1986 | get_dma_ptr(runtime, channel, hwoff), | |
1987 | bytes_to_samples(runtime, bytes)); | |
1da177e4 LT |
1988 | return 0; |
1989 | } | |
1da177e4 | 1990 | |
5c7264cf TI |
1991 | /* default copy_user ops for read; used for both interleaved and non- modes */ |
1992 | static int default_read_copy(struct snd_pcm_substream *substream, | |
1993 | int channel, unsigned long hwoff, | |
1994 | void *buf, unsigned long bytes) | |
1995 | { | |
1996 | if (copy_to_user((void __user *)buf, | |
1997 | get_dma_ptr(substream->runtime, channel, hwoff), | |
1998 | bytes)) | |
1999 | return -EFAULT; | |
2000 | return 0; | |
2001 | } | |
1da177e4 | 2002 | |
68541213 TI |
2003 | /* default copy_kernel ops for read */ |
2004 | static int default_read_copy_kernel(struct snd_pcm_substream *substream, | |
2005 | int channel, unsigned long hwoff, | |
2006 | void *buf, unsigned long bytes) | |
2007 | { | |
2008 | memcpy(buf, get_dma_ptr(substream->runtime, channel, hwoff), bytes); | |
2009 | return 0; | |
2010 | } | |
2011 | ||
9f600630 TI |
2012 | /* call transfer function with the converted pointers and sizes; |
2013 | * for interleaved mode, it's one shot for all samples | |
2014 | */ | |
2015 | static int interleaved_copy(struct snd_pcm_substream *substream, | |
2016 | snd_pcm_uframes_t hwoff, void *data, | |
2017 | snd_pcm_uframes_t off, | |
2018 | snd_pcm_uframes_t frames, | |
2019 | pcm_transfer_f transfer) | |
2020 | { | |
2021 | struct snd_pcm_runtime *runtime = substream->runtime; | |
2022 | ||
2023 | /* convert to bytes */ | |
2024 | hwoff = frames_to_bytes(runtime, hwoff); | |
2025 | off = frames_to_bytes(runtime, off); | |
2026 | frames = frames_to_bytes(runtime, frames); | |
2027 | return transfer(substream, 0, hwoff, data + off, frames); | |
2028 | } | |
2029 | ||
2030 | /* call transfer function with the converted pointers and sizes for each | |
2031 | * non-interleaved channel; when buffer is NULL, silencing instead of copying | |
2032 | */ | |
2033 | static int noninterleaved_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) | |
bdc4acf7 TI |
2038 | { |
2039 | struct snd_pcm_runtime *runtime = substream->runtime; | |
bdc4acf7 | 2040 | int channels = runtime->channels; |
9f600630 TI |
2041 | void **bufs = data; |
2042 | int c, err; | |
2043 | ||
2044 | /* convert to bytes; note that it's not frames_to_bytes() here. | |
2045 | * in non-interleaved mode, we copy for each channel, thus | |
2046 | * each copy is n_samples bytes x channels = whole frames. | |
2047 | */ | |
2048 | off = samples_to_bytes(runtime, off); | |
2049 | frames = samples_to_bytes(runtime, frames); | |
2050 | hwoff = samples_to_bytes(runtime, hwoff); | |
2051 | for (c = 0; c < channels; ++c, ++bufs) { | |
2052 | if (!data || !*bufs) | |
2053 | err = fill_silence(substream, c, hwoff, NULL, frames); | |
2054 | else | |
2055 | err = transfer(substream, c, hwoff, *bufs + off, | |
2056 | frames); | |
2057 | if (err < 0) | |
2058 | return err; | |
1da177e4 | 2059 | } |
bdc4acf7 TI |
2060 | return 0; |
2061 | } | |
2062 | ||
a9cd29e7 TI |
2063 | /* fill silence on the given buffer position; |
2064 | * called from snd_pcm_playback_silence() | |
2065 | */ | |
2066 | static int fill_silence_frames(struct snd_pcm_substream *substream, | |
2067 | snd_pcm_uframes_t off, snd_pcm_uframes_t frames) | |
2068 | { | |
2069 | if (substream->runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
2070 | substream->runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) | |
2071 | return interleaved_copy(substream, off, NULL, 0, frames, | |
2072 | fill_silence); | |
2073 | else | |
2074 | return noninterleaved_copy(substream, off, NULL, 0, frames, | |
2075 | fill_silence); | |
1da177e4 LT |
2076 | } |
2077 | ||
7eaa943c TI |
2078 | /* sanity-check for read/write methods */ |
2079 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2080 | { |
877211f5 | 2081 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2082 | if (PCM_RUNTIME_CHECK(substream)) |
2083 | return -ENXIO; | |
1da177e4 | 2084 | runtime = substream->runtime; |
bdc4acf7 | 2085 | if (snd_BUG_ON(!substream->ops->copy_user && !runtime->dma_area)) |
7eaa943c | 2086 | return -EINVAL; |
f0061c18 | 2087 | if (runtime->state == SNDRV_PCM_STATE_OPEN) |
1da177e4 | 2088 | return -EBADFD; |
7eaa943c TI |
2089 | return 0; |
2090 | } | |
2091 | ||
6ba63929 | 2092 | static int pcm_accessible_state(struct snd_pcm_runtime *runtime) |
7eaa943c | 2093 | { |
f0061c18 | 2094 | switch (runtime->state) { |
6ba63929 TI |
2095 | case SNDRV_PCM_STATE_PREPARED: |
2096 | case SNDRV_PCM_STATE_RUNNING: | |
2097 | case SNDRV_PCM_STATE_PAUSED: | |
2098 | return 0; | |
2099 | case SNDRV_PCM_STATE_XRUN: | |
2100 | return -EPIPE; | |
2101 | case SNDRV_PCM_STATE_SUSPENDED: | |
2102 | return -ESTRPIPE; | |
2103 | default: | |
2104 | return -EBADFD; | |
2105 | } | |
1da177e4 LT |
2106 | } |
2107 | ||
66e01a5c TS |
2108 | /* update to the given appl_ptr and call ack callback if needed; |
2109 | * when an error is returned, take back to the original value | |
2110 | */ | |
2111 | int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream, | |
2112 | snd_pcm_uframes_t appl_ptr) | |
1da177e4 | 2113 | { |
877211f5 | 2114 | struct snd_pcm_runtime *runtime = substream->runtime; |
66e01a5c | 2115 | snd_pcm_uframes_t old_appl_ptr = runtime->control->appl_ptr; |
b456abe6 | 2116 | snd_pcm_sframes_t diff; |
66e01a5c TS |
2117 | int ret; |
2118 | ||
f8ff2f28 TI |
2119 | if (old_appl_ptr == appl_ptr) |
2120 | return 0; | |
2121 | ||
0e888a74 PLB |
2122 | if (appl_ptr >= runtime->boundary) |
2123 | return -EINVAL; | |
b456abe6 PLB |
2124 | /* |
2125 | * check if a rewind is requested by the application | |
2126 | */ | |
2127 | if (substream->runtime->info & SNDRV_PCM_INFO_NO_REWINDS) { | |
2128 | diff = appl_ptr - old_appl_ptr; | |
2129 | if (diff >= 0) { | |
2130 | if (diff > runtime->buffer_size) | |
2131 | return -EINVAL; | |
2132 | } else { | |
2133 | if (runtime->boundary + diff > runtime->buffer_size) | |
2134 | return -EINVAL; | |
2135 | } | |
2136 | } | |
0e888a74 | 2137 | |
66e01a5c TS |
2138 | runtime->control->appl_ptr = appl_ptr; |
2139 | if (substream->ops->ack) { | |
2140 | ret = substream->ops->ack(substream); | |
2141 | if (ret < 0) { | |
2142 | runtime->control->appl_ptr = old_appl_ptr; | |
8c721c53 TI |
2143 | if (ret == -EPIPE) |
2144 | __snd_pcm_xrun(substream); | |
66e01a5c | 2145 | return ret; |
1da177e4 LT |
2146 | } |
2147 | } | |
fccf5388 TS |
2148 | |
2149 | trace_applptr(substream, old_appl_ptr, appl_ptr); | |
2150 | ||
1da177e4 LT |
2151 | return 0; |
2152 | } | |
66e01a5c | 2153 | |
5c7264cf TI |
2154 | /* the common loop for read/write data */ |
2155 | snd_pcm_sframes_t __snd_pcm_lib_xfer(struct snd_pcm_substream *substream, | |
2156 | void *data, bool interleaved, | |
68541213 | 2157 | snd_pcm_uframes_t size, bool in_kernel) |
1da177e4 | 2158 | { |
877211f5 | 2159 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2160 | snd_pcm_uframes_t xfer = 0; |
2161 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2162 | snd_pcm_uframes_t avail; |
9f600630 TI |
2163 | pcm_copy_f writer; |
2164 | pcm_transfer_f transfer; | |
c48f12ee | 2165 | bool nonblock; |
5c7264cf | 2166 | bool is_playback; |
7eaa943c | 2167 | int err; |
1da177e4 | 2168 | |
7eaa943c TI |
2169 | err = pcm_sanity_check(substream); |
2170 | if (err < 0) | |
2171 | return err; | |
e88e8ae6 | 2172 | |
5c7264cf | 2173 | is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; |
c48f12ee TI |
2174 | if (interleaved) { |
2175 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2176 | runtime->channels > 1) | |
2177 | return -EINVAL; | |
9f600630 | 2178 | writer = interleaved_copy; |
1da177e4 | 2179 | } else { |
c48f12ee TI |
2180 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2181 | return -EINVAL; | |
9f600630 | 2182 | writer = noninterleaved_copy; |
1da177e4 | 2183 | } |
1da177e4 | 2184 | |
9f600630 | 2185 | if (!data) { |
5c7264cf TI |
2186 | if (is_playback) |
2187 | transfer = fill_silence; | |
2188 | else | |
2189 | return -EINVAL; | |
68541213 TI |
2190 | } else if (in_kernel) { |
2191 | if (substream->ops->copy_kernel) | |
2192 | transfer = substream->ops->copy_kernel; | |
2193 | else | |
2194 | transfer = is_playback ? | |
2195 | default_write_copy_kernel : default_read_copy_kernel; | |
9f600630 TI |
2196 | } else { |
2197 | if (substream->ops->copy_user) | |
2198 | transfer = (pcm_transfer_f)substream->ops->copy_user; | |
2199 | else | |
5c7264cf TI |
2200 | transfer = is_playback ? |
2201 | default_write_copy : default_read_copy; | |
c48f12ee | 2202 | } |
1da177e4 LT |
2203 | |
2204 | if (size == 0) | |
2205 | return 0; | |
1da177e4 | 2206 | |
c48f12ee TI |
2207 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
2208 | ||
1da177e4 | 2209 | snd_pcm_stream_lock_irq(substream); |
6ba63929 TI |
2210 | err = pcm_accessible_state(runtime); |
2211 | if (err < 0) | |
1da177e4 | 2212 | goto _end_unlock; |
1da177e4 | 2213 | |
64b6acf6 | 2214 | runtime->twake = runtime->control->avail_min ? : 1; |
f0061c18 | 2215 | if (runtime->state == SNDRV_PCM_STATE_RUNNING) |
64b6acf6 RBP |
2216 | snd_pcm_update_hw_ptr(substream); |
2217 | ||
932a8151 RBP |
2218 | /* |
2219 | * If size < start_threshold, wait indefinitely. Another | |
2220 | * thread may start capture | |
2221 | */ | |
5c7264cf | 2222 | if (!is_playback && |
f0061c18 | 2223 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
00a399ca TI |
2224 | size >= runtime->start_threshold) { |
2225 | err = snd_pcm_start(substream); | |
2226 | if (err < 0) | |
6ba63929 | 2227 | goto _end_unlock; |
1da177e4 LT |
2228 | } |
2229 | ||
763e5067 | 2230 | avail = snd_pcm_avail(substream); |
64b6acf6 | 2231 | |
1da177e4 LT |
2232 | while (size > 0) { |
2233 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2234 | snd_pcm_uframes_t cont; |
13075510 | 2235 | if (!avail) { |
5c7264cf | 2236 | if (!is_playback && |
f0061c18 | 2237 | runtime->state == SNDRV_PCM_STATE_DRAINING) { |
13075510 | 2238 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
1da177e4 LT |
2239 | goto _end_unlock; |
2240 | } | |
1da177e4 LT |
2241 | if (nonblock) { |
2242 | err = -EAGAIN; | |
2243 | goto _end_unlock; | |
2244 | } | |
5daeba34 DD |
2245 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2246 | runtime->control->avail_min ? : 1); | |
2247 | err = wait_for_avail(substream, &avail); | |
13075510 | 2248 | if (err < 0) |
443feb88 | 2249 | goto _end_unlock; |
13075510 TI |
2250 | if (!avail) |
2251 | continue; /* draining */ | |
1da177e4 | 2252 | } |
1da177e4 | 2253 | frames = size > avail ? avail : size; |
aa30db06 TI |
2254 | appl_ptr = READ_ONCE(runtime->control->appl_ptr); |
2255 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2256 | cont = runtime->buffer_size - appl_ofs; | |
1da177e4 LT |
2257 | if (frames > cont) |
2258 | frames = cont; | |
7eaa943c | 2259 | if (snd_BUG_ON(!frames)) { |
315d9f1b TI |
2260 | err = -EINVAL; |
2261 | goto _end_unlock; | |
7eaa943c | 2262 | } |
bc55cfd5 TI |
2263 | if (!atomic_inc_unless_negative(&runtime->buffer_accessing)) { |
2264 | err = -EBUSY; | |
2265 | goto _end_unlock; | |
2266 | } | |
1da177e4 | 2267 | snd_pcm_stream_unlock_irq(substream); |
a25684a9 TI |
2268 | if (!is_playback) |
2269 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_CPU); | |
5c7264cf | 2270 | err = writer(substream, appl_ofs, data, offset, frames, |
9f600630 | 2271 | transfer); |
a25684a9 TI |
2272 | if (is_playback) |
2273 | snd_pcm_dma_buffer_sync(substream, SNDRV_DMA_SYNC_DEVICE); | |
1da177e4 | 2274 | snd_pcm_stream_lock_irq(substream); |
bc55cfd5 | 2275 | atomic_dec(&runtime->buffer_accessing); |
1250932e JK |
2276 | if (err < 0) |
2277 | goto _end_unlock; | |
6ba63929 TI |
2278 | err = pcm_accessible_state(runtime); |
2279 | if (err < 0) | |
1da177e4 | 2280 | goto _end_unlock; |
1da177e4 LT |
2281 | appl_ptr += frames; |
2282 | if (appl_ptr >= runtime->boundary) | |
2283 | appl_ptr -= runtime->boundary; | |
66e01a5c TS |
2284 | err = pcm_lib_apply_appl_ptr(substream, appl_ptr); |
2285 | if (err < 0) | |
2286 | goto _end_unlock; | |
1da177e4 LT |
2287 | |
2288 | offset += frames; | |
2289 | size -= frames; | |
2290 | xfer += frames; | |
0910c216 | 2291 | avail -= frames; |
5c7264cf | 2292 | if (is_playback && |
f0061c18 | 2293 | runtime->state == SNDRV_PCM_STATE_PREPARED && |
5c7264cf TI |
2294 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { |
2295 | err = snd_pcm_start(substream); | |
2296 | if (err < 0) | |
2297 | goto _end_unlock; | |
2298 | } | |
1da177e4 LT |
2299 | } |
2300 | _end_unlock: | |
c91a988d | 2301 | runtime->twake = 0; |
1250932e JK |
2302 | if (xfer > 0 && err >= 0) |
2303 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2304 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2305 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2306 | } | |
5c7264cf | 2307 | EXPORT_SYMBOL(__snd_pcm_lib_xfer); |
2d3391ec TI |
2308 | |
2309 | /* | |
2310 | * standard channel mapping helpers | |
2311 | */ | |
2312 | ||
2313 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2314 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2315 | { .channels = 1, | |
5efbc261 | 2316 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2317 | { .channels = 2, |
2318 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2319 | { .channels = 4, | |
2320 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2321 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2322 | { .channels = 6, | |
2323 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2324 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2325 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2326 | { .channels = 8, | |
2327 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2328 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2329 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2330 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2331 | { } | |
2332 | }; | |
2333 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2334 | ||
2335 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2336 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2337 | { .channels = 1, | |
5efbc261 | 2338 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2339 | { .channels = 2, |
2340 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2341 | { .channels = 4, | |
2342 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2343 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2344 | { .channels = 6, | |
2345 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2346 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2347 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2348 | { .channels = 8, | |
2349 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2350 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2351 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2352 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2353 | { } | |
2354 | }; | |
2355 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2356 | ||
2357 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2358 | { | |
2359 | if (ch > info->max_channels) | |
2360 | return false; | |
2361 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2362 | } | |
2363 | ||
2364 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2365 | struct snd_ctl_elem_info *uinfo) | |
2366 | { | |
2367 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2368 | ||
2369 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2d3391ec TI |
2370 | uinfo->count = info->max_channels; |
2371 | uinfo->value.integer.min = 0; | |
2372 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2373 | return 0; | |
2374 | } | |
2375 | ||
2376 | /* get callback for channel map ctl element | |
2377 | * stores the channel position firstly matching with the current channels | |
2378 | */ | |
2379 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2380 | struct snd_ctl_elem_value *ucontrol) | |
2381 | { | |
2382 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2383 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2384 | struct snd_pcm_substream *substream; | |
2385 | const struct snd_pcm_chmap_elem *map; | |
2386 | ||
2deaeaf1 | 2387 | if (!info->chmap) |
2d3391ec TI |
2388 | return -EINVAL; |
2389 | substream = snd_pcm_chmap_substream(info, idx); | |
2390 | if (!substream) | |
2391 | return -ENODEV; | |
2392 | memset(ucontrol->value.integer.value, 0, | |
fbd3eb7f | 2393 | sizeof(long) * info->max_channels); |
2d3391ec TI |
2394 | if (!substream->runtime) |
2395 | return 0; /* no channels set */ | |
2396 | for (map = info->chmap; map->channels; map++) { | |
2397 | int i; | |
2398 | if (map->channels == substream->runtime->channels && | |
2399 | valid_chmap_channels(info, map->channels)) { | |
2400 | for (i = 0; i < map->channels; i++) | |
2401 | ucontrol->value.integer.value[i] = map->map[i]; | |
2402 | return 0; | |
2403 | } | |
2404 | } | |
2405 | return -EINVAL; | |
2406 | } | |
2407 | ||
2408 | /* tlv callback for channel map ctl element | |
2409 | * expands the pre-defined channel maps in a form of TLV | |
2410 | */ | |
2411 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2412 | unsigned int size, unsigned int __user *tlv) | |
2413 | { | |
2414 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2415 | const struct snd_pcm_chmap_elem *map; | |
2416 | unsigned int __user *dst; | |
2417 | int c, count = 0; | |
2418 | ||
2deaeaf1 | 2419 | if (!info->chmap) |
2d3391ec TI |
2420 | return -EINVAL; |
2421 | if (size < 8) | |
2422 | return -ENOMEM; | |
2423 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2424 | return -EFAULT; | |
2425 | size -= 8; | |
2426 | dst = tlv + 2; | |
2427 | for (map = info->chmap; map->channels; map++) { | |
2428 | int chs_bytes = map->channels * 4; | |
2429 | if (!valid_chmap_channels(info, map->channels)) | |
2430 | continue; | |
2431 | if (size < 8) | |
2432 | return -ENOMEM; | |
2433 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2434 | put_user(chs_bytes, dst + 1)) | |
2435 | return -EFAULT; | |
2436 | dst += 2; | |
2437 | size -= 8; | |
2438 | count += 8; | |
2439 | if (size < chs_bytes) | |
2440 | return -ENOMEM; | |
2441 | size -= chs_bytes; | |
2442 | count += chs_bytes; | |
2443 | for (c = 0; c < map->channels; c++) { | |
2444 | if (put_user(map->map[c], dst)) | |
2445 | return -EFAULT; | |
2446 | dst++; | |
2447 | } | |
2448 | } | |
2449 | if (put_user(count, tlv + 1)) | |
2450 | return -EFAULT; | |
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2455 | { | |
2456 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2457 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2458 | kfree(info); | |
2459 | } | |
2460 | ||
2461 | /** | |
2462 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2463 | * @pcm: the assigned PCM instance | |
2464 | * @stream: stream direction | |
2465 | * @chmap: channel map elements (for query) | |
2466 | * @max_channels: the max number of channels for the stream | |
2467 | * @private_value: the value passed to each kcontrol's private_value field | |
2468 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2469 | * | |
2470 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2471 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2472 | */ |
2473 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2474 | const struct snd_pcm_chmap_elem *chmap, | |
2475 | int max_channels, | |
2476 | unsigned long private_value, | |
2477 | struct snd_pcm_chmap **info_ret) | |
2478 | { | |
2479 | struct snd_pcm_chmap *info; | |
2480 | struct snd_kcontrol_new knew = { | |
2481 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2482 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2483 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2484 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2485 | .info = pcm_chmap_ctl_info, | |
2486 | .get = pcm_chmap_ctl_get, | |
2487 | .tlv.c = pcm_chmap_ctl_tlv, | |
2488 | }; | |
2489 | int err; | |
2490 | ||
8d879be8 TI |
2491 | if (WARN_ON(pcm->streams[stream].chmap_kctl)) |
2492 | return -EBUSY; | |
2d3391ec TI |
2493 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
2494 | if (!info) | |
2495 | return -ENOMEM; | |
2496 | info->pcm = pcm; | |
2497 | info->stream = stream; | |
2498 | info->chmap = chmap; | |
2499 | info->max_channels = max_channels; | |
2500 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2501 | knew.name = "Playback Channel Map"; | |
2502 | else | |
2503 | knew.name = "Capture Channel Map"; | |
2504 | knew.device = pcm->device; | |
2505 | knew.count = pcm->streams[stream].substream_count; | |
2506 | knew.private_value = private_value; | |
2507 | info->kctl = snd_ctl_new1(&knew, info); | |
2508 | if (!info->kctl) { | |
2509 | kfree(info); | |
2510 | return -ENOMEM; | |
2511 | } | |
2512 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2513 | err = snd_ctl_add(pcm->card, info->kctl); | |
2514 | if (err < 0) | |
2515 | return err; | |
2516 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2517 | if (info_ret) | |
2518 | *info_ret = info; | |
2519 | return 0; | |
2520 | } | |
2521 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |