Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Abramo Bagnara <abramo@alsa-project.org> |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/slab.h> |
24 | #include <linux/time.h> | |
3f7440a6 | 25 | #include <linux/math64.h> |
d81a6d71 | 26 | #include <linux/export.h> |
1da177e4 LT |
27 | #include <sound/core.h> |
28 | #include <sound/control.h> | |
2d3391ec | 29 | #include <sound/tlv.h> |
1da177e4 LT |
30 | #include <sound/info.h> |
31 | #include <sound/pcm.h> | |
32 | #include <sound/pcm_params.h> | |
33 | #include <sound/timer.h> | |
34 | ||
f5914908 TI |
35 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
36 | #define CREATE_TRACE_POINTS | |
37 | #include "pcm_trace.h" | |
38 | #else | |
39 | #define trace_hwptr(substream, pos, in_interrupt) | |
40 | #define trace_xrun(substream) | |
41 | #define trace_hw_ptr_error(substream, reason) | |
42 | #endif | |
43 | ||
1da177e4 LT |
44 | /* |
45 | * fill ring buffer with silence | |
46 | * runtime->silence_start: starting pointer to silence area | |
47 | * runtime->silence_filled: size filled with silence | |
48 | * runtime->silence_threshold: threshold from application | |
49 | * runtime->silence_size: maximal size from application | |
50 | * | |
51 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
52 | */ | |
877211f5 | 53 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 54 | { |
877211f5 | 55 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
56 | snd_pcm_uframes_t frames, ofs, transfer; |
57 | ||
58 | if (runtime->silence_size < runtime->boundary) { | |
59 | snd_pcm_sframes_t noise_dist, n; | |
60 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
61 | n = runtime->control->appl_ptr - runtime->silence_start; | |
62 | if (n < 0) | |
63 | n += runtime->boundary; | |
64 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
65 | runtime->silence_filled -= n; | |
66 | else | |
67 | runtime->silence_filled = 0; | |
68 | runtime->silence_start = runtime->control->appl_ptr; | |
69 | } | |
235475cb | 70 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 71 | return; |
1da177e4 LT |
72 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
73 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
74 | return; | |
75 | frames = runtime->silence_threshold - noise_dist; | |
76 | if (frames > runtime->silence_size) | |
77 | frames = runtime->silence_size; | |
78 | } else { | |
79 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
80 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
81 | if (avail > runtime->buffer_size) |
82 | avail = runtime->buffer_size; | |
1da177e4 LT |
83 | runtime->silence_filled = avail > 0 ? avail : 0; |
84 | runtime->silence_start = (runtime->status->hw_ptr + | |
85 | runtime->silence_filled) % | |
86 | runtime->boundary; | |
87 | } else { | |
88 | ofs = runtime->status->hw_ptr; | |
89 | frames = new_hw_ptr - ofs; | |
90 | if ((snd_pcm_sframes_t)frames < 0) | |
91 | frames += runtime->boundary; | |
92 | runtime->silence_filled -= frames; | |
93 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
94 | runtime->silence_filled = 0; | |
9a826ddb | 95 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 96 | } else { |
9a826ddb | 97 | runtime->silence_start = ofs; |
1da177e4 | 98 | } |
1da177e4 LT |
99 | } |
100 | frames = runtime->buffer_size - runtime->silence_filled; | |
101 | } | |
7eaa943c TI |
102 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
103 | return; | |
1da177e4 LT |
104 | if (frames == 0) |
105 | return; | |
9a826ddb | 106 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
107 | while (frames > 0) { |
108 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
109 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
110 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
111 | if (substream->ops->silence) { | |
112 | int err; | |
113 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 114 | snd_BUG_ON(err < 0); |
1da177e4 LT |
115 | } else { |
116 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
117 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
118 | } | |
119 | } else { | |
120 | unsigned int c; | |
121 | unsigned int channels = runtime->channels; | |
122 | if (substream->ops->silence) { | |
123 | for (c = 0; c < channels; ++c) { | |
124 | int err; | |
125 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 126 | snd_BUG_ON(err < 0); |
1da177e4 LT |
127 | } |
128 | } else { | |
129 | size_t dma_csize = runtime->dma_bytes / channels; | |
130 | for (c = 0; c < channels; ++c) { | |
131 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
132 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
133 | } | |
134 | } | |
135 | } | |
136 | runtime->silence_filled += transfer; | |
137 | frames -= transfer; | |
138 | ofs = 0; | |
139 | } | |
140 | } | |
141 | ||
acb03d44 EB |
142 | #ifdef CONFIG_SND_DEBUG |
143 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
144 | char *name, size_t len) |
145 | { | |
146 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
147 | substream->pcm->card->number, | |
148 | substream->pcm->device, | |
149 | substream->stream ? 'c' : 'p', | |
150 | substream->number); | |
151 | } | |
acb03d44 EB |
152 | EXPORT_SYMBOL(snd_pcm_debug_name); |
153 | #endif | |
c0070110 | 154 | |
741b20cf JK |
155 | #define XRUN_DEBUG_BASIC (1<<0) |
156 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
157 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
741b20cf | 158 | |
ed3da3d9 | 159 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 160 | |
741b20cf JK |
161 | #define xrun_debug(substream, mask) \ |
162 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
163 | #else |
164 | #define xrun_debug(substream, mask) 0 | |
165 | #endif | |
ed3da3d9 | 166 | |
741b20cf JK |
167 | #define dump_stack_on_xrun(substream) do { \ |
168 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
169 | dump_stack(); \ | |
ed3da3d9 TI |
170 | } while (0) |
171 | ||
877211f5 | 172 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 173 | { |
13f040f9 JK |
174 | struct snd_pcm_runtime *runtime = substream->runtime; |
175 | ||
f5914908 | 176 | trace_xrun(substream); |
13f040f9 JK |
177 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
178 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 179 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 180 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 181 | char name[16]; |
acb03d44 | 182 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 183 | pcm_warn(substream->pcm, "XRUN: %s\n", name); |
ed3da3d9 | 184 | dump_stack_on_xrun(substream); |
1da177e4 | 185 | } |
1da177e4 LT |
186 | } |
187 | ||
0f17014b | 188 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
f5914908 | 189 | #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ |
4d96eb25 | 190 | do { \ |
f5914908 | 191 | trace_hw_ptr_error(substream, reason); \ |
4d96eb25 | 192 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ |
f5914908 TI |
193 | pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ |
194 | (in_interrupt) ? 'Q' : 'P', ##args); \ | |
4d96eb25 JK |
195 | dump_stack_on_xrun(substream); \ |
196 | } \ | |
197 | } while (0) | |
198 | ||
4d96eb25 JK |
199 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ |
200 | ||
4d96eb25 | 201 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
4d96eb25 JK |
202 | |
203 | #endif | |
204 | ||
1250932e JK |
205 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
206 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
207 | { |
208 | snd_pcm_uframes_t avail; | |
209 | ||
210 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
211 | avail = snd_pcm_playback_avail(runtime); | |
212 | else | |
213 | avail = snd_pcm_capture_avail(runtime); | |
214 | if (avail > runtime->avail_max) | |
215 | runtime->avail_max = avail; | |
4cdc115f TI |
216 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
217 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 218 | snd_pcm_drain_done(substream); |
4cdc115f TI |
219 | return -EPIPE; |
220 | } | |
221 | } else { | |
222 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 223 | xrun(substream); |
4cdc115f TI |
224 | return -EPIPE; |
225 | } | |
1da177e4 | 226 | } |
5daeba34 DD |
227 | if (runtime->twake) { |
228 | if (avail >= runtime->twake) | |
229 | wake_up(&runtime->tsleep); | |
230 | } else if (avail >= runtime->control->avail_min) | |
231 | wake_up(&runtime->sleep); | |
1da177e4 LT |
232 | return 0; |
233 | } | |
234 | ||
f240406b JK |
235 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
236 | unsigned int in_interrupt) | |
1da177e4 | 237 | { |
877211f5 | 238 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 239 | snd_pcm_uframes_t pos; |
f240406b | 240 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
241 | snd_pcm_sframes_t hdelta, delta; |
242 | unsigned long jdelta; | |
3509a03f PLB |
243 | unsigned long curr_jiffies; |
244 | struct timespec curr_tstamp; | |
4eeaaeae | 245 | struct timespec audio_tstamp; |
0e8014d7 | 246 | int crossed_boundary = 0; |
1da177e4 | 247 | |
bbf6ad13 | 248 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
249 | |
250 | /* | |
251 | * group pointer, time and jiffies reads to allow for more | |
252 | * accurate correlations/corrections. | |
253 | * The values are stored at the end of this routine after | |
254 | * corrections for hw_ptr position | |
255 | */ | |
f240406b | 256 | pos = substream->ops->pointer(substream); |
3509a03f | 257 | curr_jiffies = jiffies; |
4eeaaeae | 258 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f PLB |
259 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
260 | ||
4eeaaeae PLB |
261 | if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && |
262 | (substream->ops->wall_clock)) | |
263 | substream->ops->wall_clock(substream, &audio_tstamp); | |
264 | } | |
265 | ||
1da177e4 LT |
266 | if (pos == SNDRV_PCM_POS_XRUN) { |
267 | xrun(substream); | |
268 | return -EPIPE; | |
269 | } | |
f240406b | 270 | if (pos >= runtime->buffer_size) { |
09e56df8 | 271 | if (printk_ratelimit()) { |
f240406b | 272 | char name[16]; |
acb03d44 | 273 | snd_pcm_debug_name(substream, name, sizeof(name)); |
09e56df8 | 274 | pcm_err(substream->pcm, |
d507941b | 275 | "BUG: %s, pos = %ld, buffer size = %ld, period size = %ld\n", |
09e56df8 TI |
276 | name, pos, runtime->buffer_size, |
277 | runtime->period_size); | |
f240406b JK |
278 | } |
279 | pos = 0; | |
cedb8118 | 280 | } |
f240406b | 281 | pos -= pos % runtime->min_align; |
f5914908 | 282 | trace_hwptr(substream, pos, in_interrupt); |
ed3da3d9 TI |
283 | hw_base = runtime->hw_ptr_base; |
284 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
285 | if (in_interrupt) { |
286 | /* we know that one period was processed */ | |
287 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 288 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 289 | if (delta > new_hw_ptr) { |
bd76af0f | 290 | /* check for double acknowledged interrupts */ |
3509a03f | 291 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bd76af0f JK |
292 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { |
293 | hw_base += runtime->buffer_size; | |
0e8014d7 | 294 | if (hw_base >= runtime->boundary) { |
bd76af0f | 295 | hw_base = 0; |
0e8014d7 PLB |
296 | crossed_boundary++; |
297 | } | |
bd76af0f JK |
298 | new_hw_ptr = hw_base + pos; |
299 | goto __delta; | |
300 | } | |
1da177e4 | 301 | } |
1da177e4 | 302 | } |
f240406b JK |
303 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
304 | /* pointer crosses the end of the ring buffer */ | |
305 | if (new_hw_ptr < old_hw_ptr) { | |
306 | hw_base += runtime->buffer_size; | |
0e8014d7 | 307 | if (hw_base >= runtime->boundary) { |
f240406b | 308 | hw_base = 0; |
0e8014d7 PLB |
309 | crossed_boundary++; |
310 | } | |
f240406b JK |
311 | new_hw_ptr = hw_base + pos; |
312 | } | |
313 | __delta: | |
b406e610 CL |
314 | delta = new_hw_ptr - old_hw_ptr; |
315 | if (delta < 0) | |
316 | delta += runtime->boundary; | |
ab69a490 | 317 | |
59ff878f | 318 | if (runtime->no_period_wakeup) { |
12ff414e | 319 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
320 | /* |
321 | * Without regular period interrupts, we have to check | |
322 | * the elapsed time to detect xruns. | |
323 | */ | |
3509a03f | 324 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
325 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
326 | goto no_delta_check; | |
59ff878f | 327 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
328 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
329 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
330 | delta += runtime->buffer_size; |
331 | hw_base += runtime->buffer_size; | |
0e8014d7 | 332 | if (hw_base >= runtime->boundary) { |
59ff878f | 333 | hw_base = 0; |
0e8014d7 PLB |
334 | crossed_boundary++; |
335 | } | |
59ff878f CL |
336 | new_hw_ptr = hw_base + pos; |
337 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
338 | } | |
ab69a490 | 339 | goto no_delta_check; |
59ff878f | 340 | } |
ab69a490 | 341 | |
f240406b | 342 | /* something must be really wrong */ |
7b3a177b | 343 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f5914908 TI |
344 | hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", |
345 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
346 | substream->stream, (long)pos, | |
347 | (long)new_hw_ptr, (long)old_hw_ptr); | |
f240406b JK |
348 | return 0; |
349 | } | |
c87d9732 TI |
350 | |
351 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 352 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
353 | goto no_jiffies_check; |
354 | ||
3e5b5016 TI |
355 | /* Skip the jiffies check for hardwares with BATCH flag. |
356 | * Such hardware usually just increases the position at each IRQ, | |
357 | * thus it can't give any strange position. | |
358 | */ | |
359 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
360 | goto no_jiffies_check; | |
f240406b | 361 | hdelta = delta; |
a4444da3 JK |
362 | if (hdelta < runtime->delay) |
363 | goto no_jiffies_check; | |
364 | hdelta -= runtime->delay; | |
3509a03f | 365 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
366 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
367 | delta = jdelta / | |
368 | (((runtime->period_size * HZ) / runtime->rate) | |
369 | + HZ/100); | |
f240406b JK |
370 | /* move new_hw_ptr according jiffies not pos variable */ |
371 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 372 | hw_base = delta; |
f240406b JK |
373 | /* use loop to avoid checks for delta overflows */ |
374 | /* the delta value is small or zero in most cases */ | |
375 | while (delta > 0) { | |
376 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 377 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 378 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
379 | crossed_boundary--; |
380 | } | |
f240406b JK |
381 | delta--; |
382 | } | |
383 | /* align hw_base to buffer_size */ | |
f5914908 TI |
384 | hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", |
385 | "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", | |
bbf6ad13 JK |
386 | (long)pos, (long)hdelta, |
387 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 388 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
389 | (unsigned long)old_hw_ptr, |
390 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
391 | /* reset values to proper state */ |
392 | delta = 0; | |
393 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 394 | } |
3e5b5016 | 395 | no_jiffies_check: |
bbf6ad13 | 396 | if (delta > runtime->period_size + runtime->period_size / 2) { |
f5914908 TI |
397 | hw_ptr_error(substream, in_interrupt, |
398 | "Lost interrupts?", | |
399 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", | |
ed3da3d9 | 400 | substream->stream, (long)delta, |
f240406b JK |
401 | (long)new_hw_ptr, |
402 | (long)old_hw_ptr); | |
ed3da3d9 | 403 | } |
f240406b | 404 | |
ab69a490 | 405 | no_delta_check: |
f240406b JK |
406 | if (runtime->status->hw_ptr == new_hw_ptr) |
407 | return 0; | |
ab1863fc | 408 | |
1da177e4 LT |
409 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
410 | runtime->silence_size > 0) | |
411 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
412 | ||
e7636925 | 413 | if (in_interrupt) { |
ead4046b CL |
414 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
415 | if (delta < 0) | |
416 | delta += runtime->boundary; | |
417 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
418 | runtime->hw_ptr_interrupt += delta; | |
419 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
420 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 421 | } |
ed3da3d9 | 422 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 423 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 424 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
425 | if (crossed_boundary) { |
426 | snd_BUG_ON(crossed_boundary != 1); | |
427 | runtime->hw_ptr_wrap += runtime->boundary; | |
428 | } | |
4eeaaeae | 429 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f | 430 | runtime->status->tstamp = curr_tstamp; |
1da177e4 | 431 | |
4eeaaeae PLB |
432 | if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { |
433 | /* | |
434 | * no wall clock available, provide audio timestamp | |
435 | * derived from pointer position+delay | |
436 | */ | |
437 | u64 audio_frames, audio_nsecs; | |
438 | ||
439 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
440 | audio_frames = runtime->hw_ptr_wrap | |
441 | + runtime->status->hw_ptr | |
442 | - runtime->delay; | |
443 | else | |
444 | audio_frames = runtime->hw_ptr_wrap | |
445 | + runtime->status->hw_ptr | |
446 | + runtime->delay; | |
447 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
448 | runtime->rate); | |
449 | audio_tstamp = ns_to_timespec(audio_nsecs); | |
450 | } | |
451 | runtime->status->audio_tstamp = audio_tstamp; | |
452 | } | |
453 | ||
1250932e | 454 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
455 | } |
456 | ||
457 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 458 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 459 | { |
f240406b | 460 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
461 | } |
462 | ||
463 | /** | |
464 | * snd_pcm_set_ops - set the PCM operators | |
465 | * @pcm: the pcm instance | |
466 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
467 | * @ops: the operator table | |
468 | * | |
469 | * Sets the given PCM operators to the pcm instance. | |
470 | */ | |
e6c2e7eb LPC |
471 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
472 | const struct snd_pcm_ops *ops) | |
1da177e4 | 473 | { |
877211f5 TI |
474 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
475 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
476 | |
477 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
478 | substream->ops = ops; | |
479 | } | |
480 | ||
e88e8ae6 | 481 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
482 | |
483 | /** | |
484 | * snd_pcm_sync - set the PCM sync id | |
485 | * @substream: the pcm substream | |
486 | * | |
487 | * Sets the PCM sync identifier for the card. | |
488 | */ | |
877211f5 | 489 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 490 | { |
877211f5 | 491 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
492 | |
493 | runtime->sync.id32[0] = substream->pcm->card->number; | |
494 | runtime->sync.id32[1] = -1; | |
495 | runtime->sync.id32[2] = -1; | |
496 | runtime->sync.id32[3] = -1; | |
497 | } | |
498 | ||
e88e8ae6 TI |
499 | EXPORT_SYMBOL(snd_pcm_set_sync); |
500 | ||
1da177e4 LT |
501 | /* |
502 | * Standard ioctl routine | |
503 | */ | |
504 | ||
1da177e4 LT |
505 | static inline unsigned int div32(unsigned int a, unsigned int b, |
506 | unsigned int *r) | |
507 | { | |
508 | if (b == 0) { | |
509 | *r = 0; | |
510 | return UINT_MAX; | |
511 | } | |
512 | *r = a % b; | |
513 | return a / b; | |
514 | } | |
515 | ||
516 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
517 | { | |
518 | if (b == 0) | |
519 | return UINT_MAX; | |
520 | return a / b; | |
521 | } | |
522 | ||
523 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
524 | { | |
525 | unsigned int r; | |
526 | unsigned int q; | |
527 | if (b == 0) | |
528 | return UINT_MAX; | |
529 | q = div32(a, b, &r); | |
530 | if (r) | |
531 | ++q; | |
532 | return q; | |
533 | } | |
534 | ||
535 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
536 | { | |
537 | if (a == 0) | |
538 | return 0; | |
539 | if (div_down(UINT_MAX, a) < b) | |
540 | return UINT_MAX; | |
541 | return a * b; | |
542 | } | |
543 | ||
544 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
545 | unsigned int c, unsigned int *r) | |
546 | { | |
547 | u_int64_t n = (u_int64_t) a * b; | |
548 | if (c == 0) { | |
7eaa943c | 549 | snd_BUG_ON(!n); |
1da177e4 LT |
550 | *r = 0; |
551 | return UINT_MAX; | |
552 | } | |
3f7440a6 | 553 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
554 | if (n >= UINT_MAX) { |
555 | *r = 0; | |
556 | return UINT_MAX; | |
557 | } | |
558 | return n; | |
559 | } | |
560 | ||
1da177e4 LT |
561 | /** |
562 | * snd_interval_refine - refine the interval value of configurator | |
563 | * @i: the interval value to refine | |
564 | * @v: the interval value to refer to | |
565 | * | |
566 | * Refines the interval value with the reference value. | |
567 | * The interval is changed to the range satisfying both intervals. | |
568 | * The interval status (min, max, integer, etc.) are evaluated. | |
569 | * | |
eb7c06e8 YB |
570 | * Return: Positive if the value is changed, zero if it's not changed, or a |
571 | * negative error code. | |
1da177e4 | 572 | */ |
877211f5 | 573 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
574 | { |
575 | int changed = 0; | |
7eaa943c TI |
576 | if (snd_BUG_ON(snd_interval_empty(i))) |
577 | return -EINVAL; | |
1da177e4 LT |
578 | if (i->min < v->min) { |
579 | i->min = v->min; | |
580 | i->openmin = v->openmin; | |
581 | changed = 1; | |
582 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
583 | i->openmin = 1; | |
584 | changed = 1; | |
585 | } | |
586 | if (i->max > v->max) { | |
587 | i->max = v->max; | |
588 | i->openmax = v->openmax; | |
589 | changed = 1; | |
590 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
591 | i->openmax = 1; | |
592 | changed = 1; | |
593 | } | |
594 | if (!i->integer && v->integer) { | |
595 | i->integer = 1; | |
596 | changed = 1; | |
597 | } | |
598 | if (i->integer) { | |
599 | if (i->openmin) { | |
600 | i->min++; | |
601 | i->openmin = 0; | |
602 | } | |
603 | if (i->openmax) { | |
604 | i->max--; | |
605 | i->openmax = 0; | |
606 | } | |
607 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
608 | i->integer = 1; | |
609 | if (snd_interval_checkempty(i)) { | |
610 | snd_interval_none(i); | |
611 | return -EINVAL; | |
612 | } | |
613 | return changed; | |
614 | } | |
615 | ||
e88e8ae6 TI |
616 | EXPORT_SYMBOL(snd_interval_refine); |
617 | ||
877211f5 | 618 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 619 | { |
7eaa943c TI |
620 | if (snd_BUG_ON(snd_interval_empty(i))) |
621 | return -EINVAL; | |
1da177e4 LT |
622 | if (snd_interval_single(i)) |
623 | return 0; | |
624 | i->max = i->min; | |
625 | i->openmax = i->openmin; | |
626 | if (i->openmax) | |
627 | i->max++; | |
628 | return 1; | |
629 | } | |
630 | ||
877211f5 | 631 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 632 | { |
7eaa943c TI |
633 | if (snd_BUG_ON(snd_interval_empty(i))) |
634 | return -EINVAL; | |
1da177e4 LT |
635 | if (snd_interval_single(i)) |
636 | return 0; | |
637 | i->min = i->max; | |
638 | i->openmin = i->openmax; | |
639 | if (i->openmin) | |
640 | i->min--; | |
641 | return 1; | |
642 | } | |
643 | ||
877211f5 | 644 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
645 | { |
646 | if (a->empty || b->empty) { | |
647 | snd_interval_none(c); | |
648 | return; | |
649 | } | |
650 | c->empty = 0; | |
651 | c->min = mul(a->min, b->min); | |
652 | c->openmin = (a->openmin || b->openmin); | |
653 | c->max = mul(a->max, b->max); | |
654 | c->openmax = (a->openmax || b->openmax); | |
655 | c->integer = (a->integer && b->integer); | |
656 | } | |
657 | ||
658 | /** | |
659 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
660 | * @a: dividend |
661 | * @b: divisor | |
662 | * @c: quotient | |
1da177e4 LT |
663 | * |
664 | * c = a / b | |
665 | * | |
666 | * Returns non-zero if the value is changed, zero if not changed. | |
667 | */ | |
877211f5 | 668 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
669 | { |
670 | unsigned int r; | |
671 | if (a->empty || b->empty) { | |
672 | snd_interval_none(c); | |
673 | return; | |
674 | } | |
675 | c->empty = 0; | |
676 | c->min = div32(a->min, b->max, &r); | |
677 | c->openmin = (r || a->openmin || b->openmax); | |
678 | if (b->min > 0) { | |
679 | c->max = div32(a->max, b->min, &r); | |
680 | if (r) { | |
681 | c->max++; | |
682 | c->openmax = 1; | |
683 | } else | |
684 | c->openmax = (a->openmax || b->openmin); | |
685 | } else { | |
686 | c->max = UINT_MAX; | |
687 | c->openmax = 0; | |
688 | } | |
689 | c->integer = 0; | |
690 | } | |
691 | ||
692 | /** | |
693 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
694 | * @a: dividend 1 |
695 | * @b: dividend 2 | |
696 | * @k: divisor (as integer) | |
697 | * @c: result | |
698 | * | |
1da177e4 LT |
699 | * c = a * b / k |
700 | * | |
701 | * Returns non-zero if the value is changed, zero if not changed. | |
702 | */ | |
877211f5 TI |
703 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
704 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
705 | { |
706 | unsigned int r; | |
707 | if (a->empty || b->empty) { | |
708 | snd_interval_none(c); | |
709 | return; | |
710 | } | |
711 | c->empty = 0; | |
712 | c->min = muldiv32(a->min, b->min, k, &r); | |
713 | c->openmin = (r || a->openmin || b->openmin); | |
714 | c->max = muldiv32(a->max, b->max, k, &r); | |
715 | if (r) { | |
716 | c->max++; | |
717 | c->openmax = 1; | |
718 | } else | |
719 | c->openmax = (a->openmax || b->openmax); | |
720 | c->integer = 0; | |
721 | } | |
722 | ||
723 | /** | |
724 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
725 | * @a: dividend 1 |
726 | * @k: dividend 2 (as integer) | |
727 | * @b: divisor | |
728 | * @c: result | |
1da177e4 LT |
729 | * |
730 | * c = a * k / b | |
731 | * | |
732 | * Returns non-zero if the value is changed, zero if not changed. | |
733 | */ | |
877211f5 TI |
734 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
735 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
736 | { |
737 | unsigned int r; | |
738 | if (a->empty || b->empty) { | |
739 | snd_interval_none(c); | |
740 | return; | |
741 | } | |
742 | c->empty = 0; | |
743 | c->min = muldiv32(a->min, k, b->max, &r); | |
744 | c->openmin = (r || a->openmin || b->openmax); | |
745 | if (b->min > 0) { | |
746 | c->max = muldiv32(a->max, k, b->min, &r); | |
747 | if (r) { | |
748 | c->max++; | |
749 | c->openmax = 1; | |
750 | } else | |
751 | c->openmax = (a->openmax || b->openmin); | |
752 | } else { | |
753 | c->max = UINT_MAX; | |
754 | c->openmax = 0; | |
755 | } | |
756 | c->integer = 0; | |
757 | } | |
758 | ||
1da177e4 LT |
759 | /* ---- */ |
760 | ||
761 | ||
762 | /** | |
763 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
764 | * @i: interval to refine |
765 | * @rats_count: number of ratnum_t | |
766 | * @rats: ratnum_t array | |
767 | * @nump: pointer to store the resultant numerator | |
768 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 769 | * |
eb7c06e8 YB |
770 | * Return: Positive if the value is changed, zero if it's not changed, or a |
771 | * negative error code. | |
1da177e4 | 772 | */ |
877211f5 TI |
773 | int snd_interval_ratnum(struct snd_interval *i, |
774 | unsigned int rats_count, struct snd_ratnum *rats, | |
775 | unsigned int *nump, unsigned int *denp) | |
1da177e4 | 776 | { |
8374e24c KH |
777 | unsigned int best_num, best_den; |
778 | int best_diff; | |
1da177e4 | 779 | unsigned int k; |
877211f5 | 780 | struct snd_interval t; |
1da177e4 | 781 | int err; |
8374e24c KH |
782 | unsigned int result_num, result_den; |
783 | int result_diff; | |
1da177e4 LT |
784 | |
785 | best_num = best_den = best_diff = 0; | |
786 | for (k = 0; k < rats_count; ++k) { | |
787 | unsigned int num = rats[k].num; | |
788 | unsigned int den; | |
789 | unsigned int q = i->min; | |
790 | int diff; | |
791 | if (q == 0) | |
792 | q = 1; | |
40962d7c | 793 | den = div_up(num, q); |
1da177e4 LT |
794 | if (den < rats[k].den_min) |
795 | continue; | |
796 | if (den > rats[k].den_max) | |
797 | den = rats[k].den_max; | |
798 | else { | |
799 | unsigned int r; | |
800 | r = (den - rats[k].den_min) % rats[k].den_step; | |
801 | if (r != 0) | |
802 | den -= r; | |
803 | } | |
804 | diff = num - q * den; | |
8374e24c KH |
805 | if (diff < 0) |
806 | diff = -diff; | |
1da177e4 LT |
807 | if (best_num == 0 || |
808 | diff * best_den < best_diff * den) { | |
809 | best_diff = diff; | |
810 | best_den = den; | |
811 | best_num = num; | |
812 | } | |
813 | } | |
814 | if (best_den == 0) { | |
815 | i->empty = 1; | |
816 | return -EINVAL; | |
817 | } | |
818 | t.min = div_down(best_num, best_den); | |
819 | t.openmin = !!(best_num % best_den); | |
820 | ||
8374e24c KH |
821 | result_num = best_num; |
822 | result_diff = best_diff; | |
823 | result_den = best_den; | |
1da177e4 LT |
824 | best_num = best_den = best_diff = 0; |
825 | for (k = 0; k < rats_count; ++k) { | |
826 | unsigned int num = rats[k].num; | |
827 | unsigned int den; | |
828 | unsigned int q = i->max; | |
829 | int diff; | |
830 | if (q == 0) { | |
831 | i->empty = 1; | |
832 | return -EINVAL; | |
833 | } | |
40962d7c | 834 | den = div_down(num, q); |
1da177e4 LT |
835 | if (den > rats[k].den_max) |
836 | continue; | |
837 | if (den < rats[k].den_min) | |
838 | den = rats[k].den_min; | |
839 | else { | |
840 | unsigned int r; | |
841 | r = (den - rats[k].den_min) % rats[k].den_step; | |
842 | if (r != 0) | |
843 | den += rats[k].den_step - r; | |
844 | } | |
845 | diff = q * den - num; | |
8374e24c KH |
846 | if (diff < 0) |
847 | diff = -diff; | |
1da177e4 LT |
848 | if (best_num == 0 || |
849 | diff * best_den < best_diff * den) { | |
850 | best_diff = diff; | |
851 | best_den = den; | |
852 | best_num = num; | |
853 | } | |
854 | } | |
855 | if (best_den == 0) { | |
856 | i->empty = 1; | |
857 | return -EINVAL; | |
858 | } | |
859 | t.max = div_up(best_num, best_den); | |
860 | t.openmax = !!(best_num % best_den); | |
861 | t.integer = 0; | |
862 | err = snd_interval_refine(i, &t); | |
863 | if (err < 0) | |
864 | return err; | |
865 | ||
866 | if (snd_interval_single(i)) { | |
8374e24c KH |
867 | if (best_diff * result_den < result_diff * best_den) { |
868 | result_num = best_num; | |
869 | result_den = best_den; | |
870 | } | |
1da177e4 | 871 | if (nump) |
8374e24c | 872 | *nump = result_num; |
1da177e4 | 873 | if (denp) |
8374e24c | 874 | *denp = result_den; |
1da177e4 LT |
875 | } |
876 | return err; | |
877 | } | |
878 | ||
e88e8ae6 TI |
879 | EXPORT_SYMBOL(snd_interval_ratnum); |
880 | ||
1da177e4 LT |
881 | /** |
882 | * snd_interval_ratden - refine the interval value | |
df8db936 | 883 | * @i: interval to refine |
877211f5 TI |
884 | * @rats_count: number of struct ratden |
885 | * @rats: struct ratden array | |
df8db936 TI |
886 | * @nump: pointer to store the resultant numerator |
887 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 888 | * |
eb7c06e8 YB |
889 | * Return: Positive if the value is changed, zero if it's not changed, or a |
890 | * negative error code. | |
1da177e4 | 891 | */ |
877211f5 TI |
892 | static int snd_interval_ratden(struct snd_interval *i, |
893 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
894 | unsigned int *nump, unsigned int *denp) |
895 | { | |
896 | unsigned int best_num, best_diff, best_den; | |
897 | unsigned int k; | |
877211f5 | 898 | struct snd_interval t; |
1da177e4 LT |
899 | int err; |
900 | ||
901 | best_num = best_den = best_diff = 0; | |
902 | for (k = 0; k < rats_count; ++k) { | |
903 | unsigned int num; | |
904 | unsigned int den = rats[k].den; | |
905 | unsigned int q = i->min; | |
906 | int diff; | |
907 | num = mul(q, den); | |
908 | if (num > rats[k].num_max) | |
909 | continue; | |
910 | if (num < rats[k].num_min) | |
911 | num = rats[k].num_max; | |
912 | else { | |
913 | unsigned int r; | |
914 | r = (num - rats[k].num_min) % rats[k].num_step; | |
915 | if (r != 0) | |
916 | num += rats[k].num_step - r; | |
917 | } | |
918 | diff = num - q * den; | |
919 | if (best_num == 0 || | |
920 | diff * best_den < best_diff * den) { | |
921 | best_diff = diff; | |
922 | best_den = den; | |
923 | best_num = num; | |
924 | } | |
925 | } | |
926 | if (best_den == 0) { | |
927 | i->empty = 1; | |
928 | return -EINVAL; | |
929 | } | |
930 | t.min = div_down(best_num, best_den); | |
931 | t.openmin = !!(best_num % best_den); | |
932 | ||
933 | best_num = best_den = best_diff = 0; | |
934 | for (k = 0; k < rats_count; ++k) { | |
935 | unsigned int num; | |
936 | unsigned int den = rats[k].den; | |
937 | unsigned int q = i->max; | |
938 | int diff; | |
939 | num = mul(q, den); | |
940 | if (num < rats[k].num_min) | |
941 | continue; | |
942 | if (num > rats[k].num_max) | |
943 | num = rats[k].num_max; | |
944 | else { | |
945 | unsigned int r; | |
946 | r = (num - rats[k].num_min) % rats[k].num_step; | |
947 | if (r != 0) | |
948 | num -= r; | |
949 | } | |
950 | diff = q * den - num; | |
951 | if (best_num == 0 || | |
952 | diff * best_den < best_diff * den) { | |
953 | best_diff = diff; | |
954 | best_den = den; | |
955 | best_num = num; | |
956 | } | |
957 | } | |
958 | if (best_den == 0) { | |
959 | i->empty = 1; | |
960 | return -EINVAL; | |
961 | } | |
962 | t.max = div_up(best_num, best_den); | |
963 | t.openmax = !!(best_num % best_den); | |
964 | t.integer = 0; | |
965 | err = snd_interval_refine(i, &t); | |
966 | if (err < 0) | |
967 | return err; | |
968 | ||
969 | if (snd_interval_single(i)) { | |
970 | if (nump) | |
971 | *nump = best_num; | |
972 | if (denp) | |
973 | *denp = best_den; | |
974 | } | |
975 | return err; | |
976 | } | |
977 | ||
978 | /** | |
979 | * snd_interval_list - refine the interval value from the list | |
980 | * @i: the interval value to refine | |
981 | * @count: the number of elements in the list | |
982 | * @list: the value list | |
983 | * @mask: the bit-mask to evaluate | |
984 | * | |
985 | * Refines the interval value from the list. | |
986 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
987 | * evaluated. | |
988 | * | |
eb7c06e8 YB |
989 | * Return: Positive if the value is changed, zero if it's not changed, or a |
990 | * negative error code. | |
1da177e4 | 991 | */ |
4af87a93 MB |
992 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
993 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
994 | { |
995 | unsigned int k; | |
b1ddaf68 | 996 | struct snd_interval list_range; |
0981a260 TI |
997 | |
998 | if (!count) { | |
999 | i->empty = 1; | |
1000 | return -EINVAL; | |
1001 | } | |
b1ddaf68 CL |
1002 | snd_interval_any(&list_range); |
1003 | list_range.min = UINT_MAX; | |
1004 | list_range.max = 0; | |
1da177e4 LT |
1005 | for (k = 0; k < count; k++) { |
1006 | if (mask && !(mask & (1 << k))) | |
1007 | continue; | |
b1ddaf68 | 1008 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1009 | continue; |
b1ddaf68 CL |
1010 | list_range.min = min(list_range.min, list[k]); |
1011 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1012 | } |
b1ddaf68 | 1013 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1014 | } |
1015 | ||
e88e8ae6 TI |
1016 | EXPORT_SYMBOL(snd_interval_list); |
1017 | ||
0f519b62 | 1018 | static int snd_interval_step(struct snd_interval *i, unsigned int step) |
1da177e4 LT |
1019 | { |
1020 | unsigned int n; | |
1021 | int changed = 0; | |
0f519b62 | 1022 | n = i->min % step; |
1da177e4 LT |
1023 | if (n != 0 || i->openmin) { |
1024 | i->min += step - n; | |
df1e4719 | 1025 | i->openmin = 0; |
1da177e4 LT |
1026 | changed = 1; |
1027 | } | |
0f519b62 | 1028 | n = i->max % step; |
1da177e4 LT |
1029 | if (n != 0 || i->openmax) { |
1030 | i->max -= n; | |
df1e4719 | 1031 | i->openmax = 0; |
1da177e4 LT |
1032 | changed = 1; |
1033 | } | |
1034 | if (snd_interval_checkempty(i)) { | |
1035 | i->empty = 1; | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | return changed; | |
1039 | } | |
1040 | ||
1041 | /* Info constraints helpers */ | |
1042 | ||
1043 | /** | |
1044 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1045 | * @runtime: the pcm runtime instance | |
1046 | * @cond: condition bits | |
1047 | * @var: the variable to evaluate | |
1048 | * @func: the evaluation function | |
1049 | * @private: the private data pointer passed to function | |
1050 | * @dep: the dependent variables | |
1051 | * | |
eb7c06e8 | 1052 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1053 | */ |
877211f5 | 1054 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1055 | int var, |
1056 | snd_pcm_hw_rule_func_t func, void *private, | |
1057 | int dep, ...) | |
1058 | { | |
877211f5 TI |
1059 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1060 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1061 | unsigned int k; |
1062 | va_list args; | |
1063 | va_start(args, dep); | |
1064 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1065 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1066 | unsigned int new_rules = constrs->rules_all + 16; |
1067 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1068 | if (!new) { |
1069 | va_end(args); | |
1da177e4 | 1070 | return -ENOMEM; |
87a1c8aa | 1071 | } |
1da177e4 LT |
1072 | if (constrs->rules) { |
1073 | memcpy(new, constrs->rules, | |
1074 | constrs->rules_num * sizeof(*c)); | |
1075 | kfree(constrs->rules); | |
1076 | } | |
1077 | constrs->rules = new; | |
1078 | constrs->rules_all = new_rules; | |
1079 | } | |
1080 | c = &constrs->rules[constrs->rules_num]; | |
1081 | c->cond = cond; | |
1082 | c->func = func; | |
1083 | c->var = var; | |
1084 | c->private = private; | |
1085 | k = 0; | |
1086 | while (1) { | |
87a1c8aa JJ |
1087 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1088 | va_end(args); | |
7eaa943c | 1089 | return -EINVAL; |
87a1c8aa | 1090 | } |
1da177e4 LT |
1091 | c->deps[k++] = dep; |
1092 | if (dep < 0) | |
1093 | break; | |
1094 | dep = va_arg(args, int); | |
1095 | } | |
1096 | constrs->rules_num++; | |
1097 | va_end(args); | |
1098 | return 0; | |
87a1c8aa | 1099 | } |
1da177e4 | 1100 | |
e88e8ae6 TI |
1101 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1102 | ||
1da177e4 | 1103 | /** |
1c85cc64 | 1104 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1105 | * @runtime: PCM runtime instance |
1106 | * @var: hw_params variable to apply the mask | |
1107 | * @mask: the bitmap mask | |
1108 | * | |
1c85cc64 | 1109 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1110 | * |
1111 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1112 | */ |
877211f5 | 1113 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1114 | u_int32_t mask) |
1115 | { | |
877211f5 TI |
1116 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1117 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1118 | *maskp->bits &= mask; |
1119 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1120 | if (*maskp->bits == 0) | |
1121 | return -EINVAL; | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | /** | |
1c85cc64 | 1126 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1127 | * @runtime: PCM runtime instance |
1128 | * @var: hw_params variable to apply the mask | |
1129 | * @mask: the 64bit bitmap mask | |
1130 | * | |
1c85cc64 | 1131 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1132 | * |
1133 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1134 | */ |
877211f5 | 1135 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1136 | u_int64_t mask) |
1137 | { | |
877211f5 TI |
1138 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1139 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1140 | maskp->bits[0] &= (u_int32_t)mask; |
1141 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1142 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1143 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1144 | return -EINVAL; | |
1145 | return 0; | |
1146 | } | |
63a5d4c6 | 1147 | EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); |
1da177e4 LT |
1148 | |
1149 | /** | |
1c85cc64 | 1150 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1151 | * @runtime: PCM runtime instance |
1152 | * @var: hw_params variable to apply the integer constraint | |
1153 | * | |
1154 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1155 | * |
1156 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1157 | * negative error code. | |
1da177e4 | 1158 | */ |
877211f5 | 1159 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1160 | { |
877211f5 | 1161 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1162 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1163 | } | |
1164 | ||
e88e8ae6 TI |
1165 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1166 | ||
1da177e4 | 1167 | /** |
1c85cc64 | 1168 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1169 | * @runtime: PCM runtime instance |
1170 | * @var: hw_params variable to apply the range | |
1171 | * @min: the minimal value | |
1172 | * @max: the maximal value | |
1173 | * | |
1174 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1175 | * |
1176 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1177 | * negative error code. | |
1da177e4 | 1178 | */ |
877211f5 | 1179 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1180 | unsigned int min, unsigned int max) |
1181 | { | |
877211f5 TI |
1182 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1183 | struct snd_interval t; | |
1da177e4 LT |
1184 | t.min = min; |
1185 | t.max = max; | |
1186 | t.openmin = t.openmax = 0; | |
1187 | t.integer = 0; | |
1188 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1189 | } | |
1190 | ||
e88e8ae6 TI |
1191 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1192 | ||
877211f5 TI |
1193 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1194 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1195 | { |
877211f5 | 1196 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1197 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1198 | } | |
1199 | ||
1200 | ||
1201 | /** | |
1c85cc64 | 1202 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1203 | * @runtime: PCM runtime instance |
1204 | * @cond: condition bits | |
1205 | * @var: hw_params variable to apply the list constraint | |
1206 | * @l: list | |
1207 | * | |
1208 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1209 | * |
1210 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1211 | */ |
877211f5 | 1212 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1213 | unsigned int cond, |
1214 | snd_pcm_hw_param_t var, | |
1464189f | 1215 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1216 | { |
1217 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1218 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1219 | var, -1); |
1220 | } | |
1221 | ||
e88e8ae6 TI |
1222 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1223 | ||
877211f5 TI |
1224 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1225 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1226 | { |
877211f5 | 1227 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1228 | unsigned int num = 0, den = 0; |
1229 | int err; | |
1230 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1231 | r->nrats, r->rats, &num, &den); | |
1232 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1233 | params->rate_num = num; | |
1234 | params->rate_den = den; | |
1235 | } | |
1236 | return err; | |
1237 | } | |
1238 | ||
1239 | /** | |
1c85cc64 | 1240 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1241 | * @runtime: PCM runtime instance |
1242 | * @cond: condition bits | |
1243 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1244 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1245 | * |
1246 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1247 | */ |
877211f5 | 1248 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1249 | unsigned int cond, |
1250 | snd_pcm_hw_param_t var, | |
877211f5 | 1251 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1252 | { |
1253 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1254 | snd_pcm_hw_rule_ratnums, r, | |
1255 | var, -1); | |
1256 | } | |
1257 | ||
e88e8ae6 TI |
1258 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1259 | ||
877211f5 TI |
1260 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1261 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1262 | { |
877211f5 | 1263 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1264 | unsigned int num = 0, den = 0; |
1265 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1266 | r->nrats, r->rats, &num, &den); | |
1267 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1268 | params->rate_num = num; | |
1269 | params->rate_den = den; | |
1270 | } | |
1271 | return err; | |
1272 | } | |
1273 | ||
1274 | /** | |
1c85cc64 | 1275 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1276 | * @runtime: PCM runtime instance |
1277 | * @cond: condition bits | |
1278 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1279 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1280 | * |
1281 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1282 | */ |
877211f5 | 1283 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1284 | unsigned int cond, |
1285 | snd_pcm_hw_param_t var, | |
877211f5 | 1286 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1287 | { |
1288 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1289 | snd_pcm_hw_rule_ratdens, r, | |
1290 | var, -1); | |
1291 | } | |
1292 | ||
e88e8ae6 TI |
1293 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1294 | ||
877211f5 TI |
1295 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1296 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1297 | { |
1298 | unsigned int l = (unsigned long) rule->private; | |
1299 | int width = l & 0xffff; | |
1300 | unsigned int msbits = l >> 16; | |
877211f5 | 1301 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 | 1302 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
19f52fae | 1303 | params->msbits = min_not_zero(params->msbits, msbits); |
1da177e4 LT |
1304 | return 0; |
1305 | } | |
1306 | ||
1307 | /** | |
1c85cc64 | 1308 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1309 | * @runtime: PCM runtime instance |
1310 | * @cond: condition bits | |
1311 | * @width: sample bits width | |
1312 | * @msbits: msbits width | |
eb7c06e8 YB |
1313 | * |
1314 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1315 | */ |
877211f5 | 1316 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1317 | unsigned int cond, |
1318 | unsigned int width, | |
1319 | unsigned int msbits) | |
1320 | { | |
1321 | unsigned long l = (msbits << 16) | width; | |
1322 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1323 | snd_pcm_hw_rule_msbits, | |
1324 | (void*) l, | |
1325 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1326 | } | |
1327 | ||
e88e8ae6 TI |
1328 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1329 | ||
877211f5 TI |
1330 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1331 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1332 | { |
1333 | unsigned long step = (unsigned long) rule->private; | |
0f519b62 | 1334 | return snd_interval_step(hw_param_interval(params, rule->var), step); |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | /** | |
1c85cc64 | 1338 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1339 | * @runtime: PCM runtime instance |
1340 | * @cond: condition bits | |
1341 | * @var: hw_params variable to apply the step constraint | |
1342 | * @step: step size | |
eb7c06e8 YB |
1343 | * |
1344 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1345 | */ |
877211f5 | 1346 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1347 | unsigned int cond, |
1348 | snd_pcm_hw_param_t var, | |
1349 | unsigned long step) | |
1350 | { | |
1351 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1352 | snd_pcm_hw_rule_step, (void *) step, | |
1353 | var, -1); | |
1354 | } | |
1355 | ||
e88e8ae6 TI |
1356 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1357 | ||
877211f5 | 1358 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1359 | { |
67c39317 | 1360 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1361 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1362 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1363 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1364 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1365 | }; | |
1366 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1367 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1368 | } | |
1369 | ||
1370 | /** | |
1c85cc64 | 1371 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1372 | * @runtime: PCM runtime instance |
1373 | * @cond: condition bits | |
1374 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1375 | * |
1376 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1377 | */ |
877211f5 | 1378 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1379 | unsigned int cond, |
1380 | snd_pcm_hw_param_t var) | |
1381 | { | |
1382 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1383 | snd_pcm_hw_rule_pow2, NULL, | |
1384 | var, -1); | |
1385 | } | |
1386 | ||
e88e8ae6 TI |
1387 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1388 | ||
d5b702a6 CL |
1389 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1390 | struct snd_pcm_hw_rule *rule) | |
1391 | { | |
1392 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1393 | struct snd_interval *rate; | |
1394 | ||
1395 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1396 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1397 | } | |
1398 | ||
1399 | /** | |
1400 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1401 | * @runtime: PCM runtime instance | |
1402 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1403 | * |
1404 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1405 | */ |
1406 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1407 | unsigned int base_rate) | |
1408 | { | |
1409 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1410 | SNDRV_PCM_HW_PARAM_RATE, | |
1411 | snd_pcm_hw_rule_noresample_func, | |
1412 | (void *)(uintptr_t)base_rate, | |
1413 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1414 | } | |
1415 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1416 | ||
877211f5 | 1417 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1418 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1419 | { |
1420 | if (hw_is_mask(var)) { | |
1421 | snd_mask_any(hw_param_mask(params, var)); | |
1422 | params->cmask |= 1 << var; | |
1423 | params->rmask |= 1 << var; | |
1424 | return; | |
1425 | } | |
1426 | if (hw_is_interval(var)) { | |
1427 | snd_interval_any(hw_param_interval(params, var)); | |
1428 | params->cmask |= 1 << var; | |
1429 | params->rmask |= 1 << var; | |
1430 | return; | |
1431 | } | |
1432 | snd_BUG(); | |
1433 | } | |
1434 | ||
877211f5 | 1435 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1436 | { |
1437 | unsigned int k; | |
1438 | memset(params, 0, sizeof(*params)); | |
1439 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1440 | _snd_pcm_hw_param_any(params, k); | |
1441 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1442 | _snd_pcm_hw_param_any(params, k); | |
1443 | params->info = ~0U; | |
1444 | } | |
1445 | ||
e88e8ae6 | 1446 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1447 | |
1448 | /** | |
1c85cc64 | 1449 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1450 | * @params: the hw_params instance |
1451 | * @var: parameter to retrieve | |
1c85cc64 | 1452 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1453 | * |
eb7c06e8 YB |
1454 | * Return: The value for field @var if it's fixed in configuration space |
1455 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1456 | */ |
e88e8ae6 TI |
1457 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1458 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1459 | { |
1460 | if (hw_is_mask(var)) { | |
877211f5 | 1461 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1462 | if (!snd_mask_single(mask)) |
1463 | return -EINVAL; | |
1464 | if (dir) | |
1465 | *dir = 0; | |
1466 | return snd_mask_value(mask); | |
1467 | } | |
1468 | if (hw_is_interval(var)) { | |
877211f5 | 1469 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1470 | if (!snd_interval_single(i)) |
1471 | return -EINVAL; | |
1472 | if (dir) | |
1473 | *dir = i->openmin; | |
1474 | return snd_interval_value(i); | |
1475 | } | |
1da177e4 LT |
1476 | return -EINVAL; |
1477 | } | |
1478 | ||
e88e8ae6 | 1479 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1480 | |
877211f5 | 1481 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1482 | snd_pcm_hw_param_t var) |
1483 | { | |
1484 | if (hw_is_mask(var)) { | |
1485 | snd_mask_none(hw_param_mask(params, var)); | |
1486 | params->cmask |= 1 << var; | |
1487 | params->rmask |= 1 << var; | |
1488 | } else if (hw_is_interval(var)) { | |
1489 | snd_interval_none(hw_param_interval(params, var)); | |
1490 | params->cmask |= 1 << var; | |
1491 | params->rmask |= 1 << var; | |
1492 | } else { | |
1493 | snd_BUG(); | |
1494 | } | |
1495 | } | |
1496 | ||
e88e8ae6 | 1497 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1498 | |
877211f5 | 1499 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1500 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1501 | { |
1502 | int changed; | |
1503 | if (hw_is_mask(var)) | |
1504 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1505 | else if (hw_is_interval(var)) | |
1506 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1507 | else |
1da177e4 | 1508 | return -EINVAL; |
1da177e4 LT |
1509 | if (changed) { |
1510 | params->cmask |= 1 << var; | |
1511 | params->rmask |= 1 << var; | |
1512 | } | |
1513 | return changed; | |
1514 | } | |
1515 | ||
1516 | ||
1517 | /** | |
1c85cc64 | 1518 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1519 | * @pcm: PCM instance |
1520 | * @params: the hw_params instance | |
1521 | * @var: parameter to retrieve | |
1c85cc64 | 1522 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1523 | * |
1c85cc64 | 1524 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1525 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1526 | * |
1527 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1528 | */ |
e88e8ae6 TI |
1529 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1530 | struct snd_pcm_hw_params *params, | |
1531 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1532 | { |
1533 | int changed = _snd_pcm_hw_param_first(params, var); | |
1534 | if (changed < 0) | |
1535 | return changed; | |
1536 | if (params->rmask) { | |
1537 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1538 | if (snd_BUG_ON(err < 0)) |
1539 | return err; | |
1da177e4 LT |
1540 | } |
1541 | return snd_pcm_hw_param_value(params, var, dir); | |
1542 | } | |
1543 | ||
e88e8ae6 TI |
1544 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1545 | ||
877211f5 | 1546 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1547 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1548 | { |
1549 | int changed; | |
1550 | if (hw_is_mask(var)) | |
1551 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1552 | else if (hw_is_interval(var)) | |
1553 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1554 | else |
1da177e4 | 1555 | return -EINVAL; |
1da177e4 LT |
1556 | if (changed) { |
1557 | params->cmask |= 1 << var; | |
1558 | params->rmask |= 1 << var; | |
1559 | } | |
1560 | return changed; | |
1561 | } | |
1562 | ||
1563 | ||
1564 | /** | |
1c85cc64 | 1565 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1566 | * @pcm: PCM instance |
1567 | * @params: the hw_params instance | |
1568 | * @var: parameter to retrieve | |
1c85cc64 | 1569 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1570 | * |
1c85cc64 | 1571 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1572 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1573 | * |
1574 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1575 | */ |
e88e8ae6 TI |
1576 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1577 | struct snd_pcm_hw_params *params, | |
1578 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1579 | { |
1580 | int changed = _snd_pcm_hw_param_last(params, var); | |
1581 | if (changed < 0) | |
1582 | return changed; | |
1583 | if (params->rmask) { | |
1584 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1585 | if (snd_BUG_ON(err < 0)) |
1586 | return err; | |
1da177e4 LT |
1587 | } |
1588 | return snd_pcm_hw_param_value(params, var, dir); | |
1589 | } | |
1590 | ||
e88e8ae6 | 1591 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1592 | |
1593 | /** | |
1c85cc64 | 1594 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1595 | * @pcm: PCM instance |
1596 | * @params: the hw_params instance | |
1da177e4 | 1597 | * |
1c85cc64 | 1598 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1599 | * The configuration chosen is that obtained fixing in this order: |
1600 | * first access, first format, first subformat, min channels, | |
1601 | * min rate, min period time, max buffer size, min tick time | |
eb7c06e8 YB |
1602 | * |
1603 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1604 | */ |
2f4ca8e5 TI |
1605 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1606 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1607 | { |
2f4ca8e5 TI |
1608 | static int vars[] = { |
1609 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1610 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1611 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1612 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1613 | SNDRV_PCM_HW_PARAM_RATE, | |
1614 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1615 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1616 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1617 | -1 | |
1618 | }; | |
1619 | int err, *v; | |
1da177e4 | 1620 | |
2f4ca8e5 TI |
1621 | for (v = vars; *v != -1; v++) { |
1622 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1623 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1624 | else | |
1625 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1626 | if (snd_BUG_ON(err < 0)) |
1627 | return err; | |
2f4ca8e5 | 1628 | } |
1da177e4 LT |
1629 | return 0; |
1630 | } | |
1631 | ||
877211f5 | 1632 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1633 | void *arg) |
1634 | { | |
877211f5 | 1635 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1636 | unsigned long flags; |
1637 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1638 | if (snd_pcm_running(substream) && | |
1639 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1640 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1641 | else { |
1da177e4 | 1642 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1643 | runtime->hw_ptr_wrap = 0; |
1644 | } | |
1da177e4 LT |
1645 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1646 | return 0; | |
1647 | } | |
1648 | ||
877211f5 | 1649 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1650 | void *arg) |
1651 | { | |
877211f5 TI |
1652 | struct snd_pcm_channel_info *info = arg; |
1653 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1654 | int width; |
1655 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1656 | info->offset = -1; | |
1657 | return 0; | |
1658 | } | |
1659 | width = snd_pcm_format_physical_width(runtime->format); | |
1660 | if (width < 0) | |
1661 | return width; | |
1662 | info->offset = 0; | |
1663 | switch (runtime->access) { | |
1664 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1665 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1666 | info->first = info->channel * width; | |
1667 | info->step = runtime->channels * width; | |
1668 | break; | |
1669 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1670 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1671 | { | |
1672 | size_t size = runtime->dma_bytes / runtime->channels; | |
1673 | info->first = info->channel * size * 8; | |
1674 | info->step = width; | |
1675 | break; | |
1676 | } | |
1677 | default: | |
1678 | snd_BUG(); | |
1679 | break; | |
1680 | } | |
1681 | return 0; | |
1682 | } | |
1683 | ||
8bea869c JK |
1684 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1685 | void *arg) | |
1686 | { | |
1687 | struct snd_pcm_hw_params *params = arg; | |
1688 | snd_pcm_format_t format; | |
a9960e6a CL |
1689 | int channels; |
1690 | ssize_t frame_size; | |
8bea869c JK |
1691 | |
1692 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1693 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1694 | format = params_format(params); | |
1695 | channels = params_channels(params); | |
a9960e6a CL |
1696 | frame_size = snd_pcm_format_size(format, channels); |
1697 | if (frame_size > 0) | |
1698 | params->fifo_size /= (unsigned)frame_size; | |
8bea869c JK |
1699 | } |
1700 | return 0; | |
1701 | } | |
1702 | ||
1da177e4 LT |
1703 | /** |
1704 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1705 | * @substream: the pcm substream instance | |
1706 | * @cmd: ioctl command | |
1707 | * @arg: ioctl argument | |
1708 | * | |
1709 | * Processes the generic ioctl commands for PCM. | |
1710 | * Can be passed as the ioctl callback for PCM ops. | |
1711 | * | |
eb7c06e8 | 1712 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1713 | */ |
877211f5 | 1714 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1715 | unsigned int cmd, void *arg) |
1716 | { | |
1717 | switch (cmd) { | |
1718 | case SNDRV_PCM_IOCTL1_INFO: | |
1719 | return 0; | |
1720 | case SNDRV_PCM_IOCTL1_RESET: | |
1721 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1722 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1723 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1724 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1725 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1726 | } |
1727 | return -ENXIO; | |
1728 | } | |
1729 | ||
e88e8ae6 TI |
1730 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1731 | ||
1da177e4 LT |
1732 | /** |
1733 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1734 | * @substream: the pcm substream instance | |
1735 | * | |
1736 | * This function is called from the interrupt handler when the | |
1737 | * PCM has processed the period size. It will update the current | |
31e8960b | 1738 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1739 | * |
1740 | * Even if more than one periods have elapsed since the last call, you | |
1741 | * have to call this only once. | |
1742 | */ | |
877211f5 | 1743 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1744 | { |
877211f5 | 1745 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1746 | unsigned long flags; |
1747 | ||
7eaa943c TI |
1748 | if (PCM_RUNTIME_CHECK(substream)) |
1749 | return; | |
1da177e4 | 1750 | runtime = substream->runtime; |
1da177e4 LT |
1751 | |
1752 | if (runtime->transfer_ack_begin) | |
1753 | runtime->transfer_ack_begin(substream); | |
1754 | ||
1755 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1756 | if (!snd_pcm_running(substream) || | |
f240406b | 1757 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1758 | goto _end; |
1759 | ||
1760 | if (substream->timer_running) | |
1761 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1762 | _end: |
1763 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1764 | if (runtime->transfer_ack_end) | |
1765 | runtime->transfer_ack_end(substream); | |
1766 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1767 | } | |
1768 | ||
e88e8ae6 TI |
1769 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1770 | ||
13075510 TI |
1771 | /* |
1772 | * Wait until avail_min data becomes available | |
1773 | * Returns a negative error code if any error occurs during operation. | |
1774 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1775 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1776 | */ | |
5daeba34 | 1777 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1778 | snd_pcm_uframes_t *availp) |
1779 | { | |
1780 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1781 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1782 | wait_queue_t wait; | |
1783 | int err = 0; | |
1784 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1785 | long wait_time, tout; |
1786 | ||
763437a9 AV |
1787 | init_waitqueue_entry(&wait, current); |
1788 | set_current_state(TASK_INTERRUPTIBLE); | |
1789 | add_wait_queue(&runtime->tsleep, &wait); | |
1790 | ||
f2b3614c TI |
1791 | if (runtime->no_period_wakeup) |
1792 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1793 | else { | |
1794 | wait_time = 10; | |
1795 | if (runtime->rate) { | |
1796 | long t = runtime->period_size * 2 / runtime->rate; | |
1797 | wait_time = max(t, wait_time); | |
1798 | } | |
1799 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1800 | } | |
763437a9 | 1801 | |
13075510 TI |
1802 | for (;;) { |
1803 | if (signal_pending(current)) { | |
1804 | err = -ERESTARTSYS; | |
1805 | break; | |
1806 | } | |
763437a9 AV |
1807 | |
1808 | /* | |
1809 | * We need to check if space became available already | |
1810 | * (and thus the wakeup happened already) first to close | |
1811 | * the race of space already having become available. | |
1812 | * This check must happen after been added to the waitqueue | |
1813 | * and having current state be INTERRUPTIBLE. | |
1814 | */ | |
1815 | if (is_playback) | |
1816 | avail = snd_pcm_playback_avail(runtime); | |
1817 | else | |
1818 | avail = snd_pcm_capture_avail(runtime); | |
1819 | if (avail >= runtime->twake) | |
1820 | break; | |
13075510 | 1821 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1822 | |
1823 | tout = schedule_timeout(wait_time); | |
1824 | ||
13075510 | 1825 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1826 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1827 | switch (runtime->status->state) { |
1828 | case SNDRV_PCM_STATE_SUSPENDED: | |
1829 | err = -ESTRPIPE; | |
1830 | goto _endloop; | |
1831 | case SNDRV_PCM_STATE_XRUN: | |
1832 | err = -EPIPE; | |
1833 | goto _endloop; | |
1834 | case SNDRV_PCM_STATE_DRAINING: | |
1835 | if (is_playback) | |
1836 | err = -EPIPE; | |
1837 | else | |
1838 | avail = 0; /* indicate draining */ | |
1839 | goto _endloop; | |
1840 | case SNDRV_PCM_STATE_OPEN: | |
1841 | case SNDRV_PCM_STATE_SETUP: | |
1842 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1843 | err = -EBADFD; | |
1844 | goto _endloop; | |
ed697e1a JK |
1845 | case SNDRV_PCM_STATE_PAUSED: |
1846 | continue; | |
13075510 TI |
1847 | } |
1848 | if (!tout) { | |
09e56df8 TI |
1849 | pcm_dbg(substream->pcm, |
1850 | "%s write error (DMA or IRQ trouble?)\n", | |
1851 | is_playback ? "playback" : "capture"); | |
13075510 TI |
1852 | err = -EIO; |
1853 | break; | |
1854 | } | |
13075510 TI |
1855 | } |
1856 | _endloop: | |
763437a9 | 1857 | set_current_state(TASK_RUNNING); |
c91a988d | 1858 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1859 | *availp = avail; |
1860 | return err; | |
1861 | } | |
1862 | ||
877211f5 | 1863 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1864 | unsigned int hwoff, |
1865 | unsigned long data, unsigned int off, | |
1866 | snd_pcm_uframes_t frames) | |
1867 | { | |
877211f5 | 1868 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1869 | int err; |
1870 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1871 | if (substream->ops->copy) { | |
1872 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1873 | return err; | |
1874 | } else { | |
1875 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1876 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1877 | return -EFAULT; | |
1878 | } | |
1879 | return 0; | |
1880 | } | |
1881 | ||
877211f5 | 1882 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1883 | unsigned long data, unsigned int off, |
1884 | snd_pcm_uframes_t size); | |
1885 | ||
877211f5 | 1886 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1887 | unsigned long data, |
1888 | snd_pcm_uframes_t size, | |
1889 | int nonblock, | |
1890 | transfer_f transfer) | |
1891 | { | |
877211f5 | 1892 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1893 | snd_pcm_uframes_t xfer = 0; |
1894 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 1895 | snd_pcm_uframes_t avail; |
1da177e4 LT |
1896 | int err = 0; |
1897 | ||
1898 | if (size == 0) | |
1899 | return 0; | |
1da177e4 LT |
1900 | |
1901 | snd_pcm_stream_lock_irq(substream); | |
1902 | switch (runtime->status->state) { | |
1903 | case SNDRV_PCM_STATE_PREPARED: | |
1904 | case SNDRV_PCM_STATE_RUNNING: | |
1905 | case SNDRV_PCM_STATE_PAUSED: | |
1906 | break; | |
1907 | case SNDRV_PCM_STATE_XRUN: | |
1908 | err = -EPIPE; | |
1909 | goto _end_unlock; | |
1910 | case SNDRV_PCM_STATE_SUSPENDED: | |
1911 | err = -ESTRPIPE; | |
1912 | goto _end_unlock; | |
1913 | default: | |
1914 | err = -EBADFD; | |
1915 | goto _end_unlock; | |
1916 | } | |
1917 | ||
5daeba34 | 1918 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
1919 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1920 | snd_pcm_update_hw_ptr(substream); | |
1921 | avail = snd_pcm_playback_avail(runtime); | |
1da177e4 LT |
1922 | while (size > 0) { |
1923 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 1924 | snd_pcm_uframes_t cont; |
13075510 | 1925 | if (!avail) { |
1da177e4 LT |
1926 | if (nonblock) { |
1927 | err = -EAGAIN; | |
1928 | goto _end_unlock; | |
1929 | } | |
5daeba34 DD |
1930 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
1931 | runtime->control->avail_min ? : 1); | |
1932 | err = wait_for_avail(substream, &avail); | |
13075510 | 1933 | if (err < 0) |
443feb88 | 1934 | goto _end_unlock; |
1da177e4 | 1935 | } |
1da177e4 LT |
1936 | frames = size > avail ? avail : size; |
1937 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1938 | if (frames > cont) | |
1939 | frames = cont; | |
7eaa943c | 1940 | if (snd_BUG_ON(!frames)) { |
c91a988d | 1941 | runtime->twake = 0; |
7eaa943c TI |
1942 | snd_pcm_stream_unlock_irq(substream); |
1943 | return -EINVAL; | |
1944 | } | |
1da177e4 LT |
1945 | appl_ptr = runtime->control->appl_ptr; |
1946 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1947 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 1948 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 1949 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
1950 | if (err < 0) |
1951 | goto _end_unlock; | |
1da177e4 LT |
1952 | switch (runtime->status->state) { |
1953 | case SNDRV_PCM_STATE_XRUN: | |
1954 | err = -EPIPE; | |
1955 | goto _end_unlock; | |
1956 | case SNDRV_PCM_STATE_SUSPENDED: | |
1957 | err = -ESTRPIPE; | |
1958 | goto _end_unlock; | |
1959 | default: | |
1960 | break; | |
1961 | } | |
1962 | appl_ptr += frames; | |
1963 | if (appl_ptr >= runtime->boundary) | |
1964 | appl_ptr -= runtime->boundary; | |
1965 | runtime->control->appl_ptr = appl_ptr; | |
1966 | if (substream->ops->ack) | |
1967 | substream->ops->ack(substream); | |
1968 | ||
1969 | offset += frames; | |
1970 | size -= frames; | |
1971 | xfer += frames; | |
0910c216 | 1972 | avail -= frames; |
1da177e4 LT |
1973 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
1974 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1975 | err = snd_pcm_start(substream); | |
1976 | if (err < 0) | |
1977 | goto _end_unlock; | |
1978 | } | |
1da177e4 LT |
1979 | } |
1980 | _end_unlock: | |
c91a988d | 1981 | runtime->twake = 0; |
1250932e JK |
1982 | if (xfer > 0 && err >= 0) |
1983 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 1984 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
1985 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
1986 | } | |
1987 | ||
7eaa943c TI |
1988 | /* sanity-check for read/write methods */ |
1989 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1990 | { |
877211f5 | 1991 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1992 | if (PCM_RUNTIME_CHECK(substream)) |
1993 | return -ENXIO; | |
1da177e4 | 1994 | runtime = substream->runtime; |
7eaa943c TI |
1995 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1996 | return -EINVAL; | |
1da177e4 LT |
1997 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1998 | return -EBADFD; | |
7eaa943c TI |
1999 | return 0; |
2000 | } | |
2001 | ||
2002 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
2003 | { | |
2004 | struct snd_pcm_runtime *runtime; | |
2005 | int nonblock; | |
2006 | int err; | |
1da177e4 | 2007 | |
7eaa943c TI |
2008 | err = pcm_sanity_check(substream); |
2009 | if (err < 0) | |
2010 | return err; | |
2011 | runtime = substream->runtime; | |
0df63e44 | 2012 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2013 | |
2014 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2015 | runtime->channels > 1) | |
2016 | return -EINVAL; | |
2017 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
2018 | snd_pcm_lib_write_transfer); | |
2019 | } | |
2020 | ||
e88e8ae6 TI |
2021 | EXPORT_SYMBOL(snd_pcm_lib_write); |
2022 | ||
877211f5 | 2023 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2024 | unsigned int hwoff, |
2025 | unsigned long data, unsigned int off, | |
2026 | snd_pcm_uframes_t frames) | |
2027 | { | |
877211f5 | 2028 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2029 | int err; |
2030 | void __user **bufs = (void __user **)data; | |
2031 | int channels = runtime->channels; | |
2032 | int c; | |
2033 | if (substream->ops->copy) { | |
7eaa943c TI |
2034 | if (snd_BUG_ON(!substream->ops->silence)) |
2035 | return -EINVAL; | |
1da177e4 LT |
2036 | for (c = 0; c < channels; ++c, ++bufs) { |
2037 | if (*bufs == NULL) { | |
2038 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
2039 | return err; | |
2040 | } else { | |
2041 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2042 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2043 | return err; | |
2044 | } | |
2045 | } | |
2046 | } else { | |
2047 | /* default transfer behaviour */ | |
2048 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2049 | for (c = 0; c < channels; ++c, ++bufs) { |
2050 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2051 | if (*bufs == NULL) { | |
2052 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
2053 | } else { | |
2054 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2055 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
2056 | return -EFAULT; | |
2057 | } | |
2058 | } | |
2059 | } | |
2060 | return 0; | |
2061 | } | |
2062 | ||
877211f5 | 2063 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
2064 | void __user **bufs, |
2065 | snd_pcm_uframes_t frames) | |
2066 | { | |
877211f5 | 2067 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2068 | int nonblock; |
7eaa943c | 2069 | int err; |
1da177e4 | 2070 | |
7eaa943c TI |
2071 | err = pcm_sanity_check(substream); |
2072 | if (err < 0) | |
2073 | return err; | |
1da177e4 | 2074 | runtime = substream->runtime; |
0df63e44 | 2075 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2076 | |
2077 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2078 | return -EINVAL; | |
2079 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2080 | nonblock, snd_pcm_lib_writev_transfer); | |
2081 | } | |
2082 | ||
e88e8ae6 TI |
2083 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
2084 | ||
877211f5 | 2085 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2086 | unsigned int hwoff, |
2087 | unsigned long data, unsigned int off, | |
2088 | snd_pcm_uframes_t frames) | |
2089 | { | |
877211f5 | 2090 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2091 | int err; |
2092 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2093 | if (substream->ops->copy) { | |
2094 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2095 | return err; | |
2096 | } else { | |
2097 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2098 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2099 | return -EFAULT; | |
2100 | } | |
2101 | return 0; | |
2102 | } | |
2103 | ||
877211f5 | 2104 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2105 | unsigned long data, |
2106 | snd_pcm_uframes_t size, | |
2107 | int nonblock, | |
2108 | transfer_f transfer) | |
2109 | { | |
877211f5 | 2110 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2111 | snd_pcm_uframes_t xfer = 0; |
2112 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2113 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2114 | int err = 0; |
2115 | ||
2116 | if (size == 0) | |
2117 | return 0; | |
1da177e4 LT |
2118 | |
2119 | snd_pcm_stream_lock_irq(substream); | |
2120 | switch (runtime->status->state) { | |
2121 | case SNDRV_PCM_STATE_PREPARED: | |
2122 | if (size >= runtime->start_threshold) { | |
2123 | err = snd_pcm_start(substream); | |
2124 | if (err < 0) | |
2125 | goto _end_unlock; | |
2126 | } | |
2127 | break; | |
2128 | case SNDRV_PCM_STATE_DRAINING: | |
2129 | case SNDRV_PCM_STATE_RUNNING: | |
2130 | case SNDRV_PCM_STATE_PAUSED: | |
2131 | break; | |
2132 | case SNDRV_PCM_STATE_XRUN: | |
2133 | err = -EPIPE; | |
2134 | goto _end_unlock; | |
2135 | case SNDRV_PCM_STATE_SUSPENDED: | |
2136 | err = -ESTRPIPE; | |
2137 | goto _end_unlock; | |
2138 | default: | |
2139 | err = -EBADFD; | |
2140 | goto _end_unlock; | |
2141 | } | |
2142 | ||
5daeba34 | 2143 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2144 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2145 | snd_pcm_update_hw_ptr(substream); | |
2146 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2147 | while (size > 0) { |
2148 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2149 | snd_pcm_uframes_t cont; |
13075510 TI |
2150 | if (!avail) { |
2151 | if (runtime->status->state == | |
2152 | SNDRV_PCM_STATE_DRAINING) { | |
2153 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2154 | goto _end_unlock; |
2155 | } | |
1da177e4 LT |
2156 | if (nonblock) { |
2157 | err = -EAGAIN; | |
2158 | goto _end_unlock; | |
2159 | } | |
5daeba34 DD |
2160 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2161 | runtime->control->avail_min ? : 1); | |
2162 | err = wait_for_avail(substream, &avail); | |
13075510 | 2163 | if (err < 0) |
443feb88 | 2164 | goto _end_unlock; |
13075510 TI |
2165 | if (!avail) |
2166 | continue; /* draining */ | |
1da177e4 | 2167 | } |
1da177e4 LT |
2168 | frames = size > avail ? avail : size; |
2169 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2170 | if (frames > cont) | |
2171 | frames = cont; | |
7eaa943c | 2172 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2173 | runtime->twake = 0; |
7eaa943c TI |
2174 | snd_pcm_stream_unlock_irq(substream); |
2175 | return -EINVAL; | |
2176 | } | |
1da177e4 LT |
2177 | appl_ptr = runtime->control->appl_ptr; |
2178 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2179 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2180 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2181 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2182 | if (err < 0) |
2183 | goto _end_unlock; | |
1da177e4 LT |
2184 | switch (runtime->status->state) { |
2185 | case SNDRV_PCM_STATE_XRUN: | |
2186 | err = -EPIPE; | |
2187 | goto _end_unlock; | |
2188 | case SNDRV_PCM_STATE_SUSPENDED: | |
2189 | err = -ESTRPIPE; | |
2190 | goto _end_unlock; | |
2191 | default: | |
2192 | break; | |
2193 | } | |
2194 | appl_ptr += frames; | |
2195 | if (appl_ptr >= runtime->boundary) | |
2196 | appl_ptr -= runtime->boundary; | |
2197 | runtime->control->appl_ptr = appl_ptr; | |
2198 | if (substream->ops->ack) | |
2199 | substream->ops->ack(substream); | |
2200 | ||
2201 | offset += frames; | |
2202 | size -= frames; | |
2203 | xfer += frames; | |
0910c216 | 2204 | avail -= frames; |
1da177e4 LT |
2205 | } |
2206 | _end_unlock: | |
c91a988d | 2207 | runtime->twake = 0; |
1250932e JK |
2208 | if (xfer > 0 && err >= 0) |
2209 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2210 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2211 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2212 | } | |
2213 | ||
877211f5 | 2214 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2215 | { |
877211f5 | 2216 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2217 | int nonblock; |
7eaa943c | 2218 | int err; |
1da177e4 | 2219 | |
7eaa943c TI |
2220 | err = pcm_sanity_check(substream); |
2221 | if (err < 0) | |
2222 | return err; | |
1da177e4 | 2223 | runtime = substream->runtime; |
0df63e44 | 2224 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2225 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2226 | return -EINVAL; | |
2227 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2228 | } | |
2229 | ||
e88e8ae6 TI |
2230 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2231 | ||
877211f5 | 2232 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2233 | unsigned int hwoff, |
2234 | unsigned long data, unsigned int off, | |
2235 | snd_pcm_uframes_t frames) | |
2236 | { | |
877211f5 | 2237 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2238 | int err; |
2239 | void __user **bufs = (void __user **)data; | |
2240 | int channels = runtime->channels; | |
2241 | int c; | |
2242 | if (substream->ops->copy) { | |
2243 | for (c = 0; c < channels; ++c, ++bufs) { | |
2244 | char __user *buf; | |
2245 | if (*bufs == NULL) | |
2246 | continue; | |
2247 | buf = *bufs + samples_to_bytes(runtime, off); | |
2248 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2249 | return err; | |
2250 | } | |
2251 | } else { | |
2252 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2253 | for (c = 0; c < channels; ++c, ++bufs) { |
2254 | char *hwbuf; | |
2255 | char __user *buf; | |
2256 | if (*bufs == NULL) | |
2257 | continue; | |
2258 | ||
2259 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2260 | buf = *bufs + samples_to_bytes(runtime, off); | |
2261 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2262 | return -EFAULT; | |
2263 | } | |
2264 | } | |
2265 | return 0; | |
2266 | } | |
2267 | ||
877211f5 | 2268 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2269 | void __user **bufs, |
2270 | snd_pcm_uframes_t frames) | |
2271 | { | |
877211f5 | 2272 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2273 | int nonblock; |
7eaa943c | 2274 | int err; |
1da177e4 | 2275 | |
7eaa943c TI |
2276 | err = pcm_sanity_check(substream); |
2277 | if (err < 0) | |
2278 | return err; | |
1da177e4 | 2279 | runtime = substream->runtime; |
1da177e4 LT |
2280 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2281 | return -EBADFD; | |
2282 | ||
0df63e44 | 2283 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2284 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2285 | return -EINVAL; | |
2286 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2287 | } | |
2288 | ||
1da177e4 | 2289 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec TI |
2290 | |
2291 | /* | |
2292 | * standard channel mapping helpers | |
2293 | */ | |
2294 | ||
2295 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2296 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2297 | { .channels = 1, | |
5efbc261 | 2298 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2299 | { .channels = 2, |
2300 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2301 | { .channels = 4, | |
2302 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2303 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2304 | { .channels = 6, | |
2305 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2306 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2307 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2308 | { .channels = 8, | |
2309 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2310 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2311 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2312 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2313 | { } | |
2314 | }; | |
2315 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2316 | ||
2317 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2318 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2319 | { .channels = 1, | |
5efbc261 | 2320 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2321 | { .channels = 2, |
2322 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2323 | { .channels = 4, | |
2324 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2325 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2326 | { .channels = 6, | |
2327 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2328 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2329 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2330 | { .channels = 8, | |
2331 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2332 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2333 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2334 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2335 | { } | |
2336 | }; | |
2337 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2338 | ||
2339 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2340 | { | |
2341 | if (ch > info->max_channels) | |
2342 | return false; | |
2343 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2344 | } | |
2345 | ||
2346 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2347 | struct snd_ctl_elem_info *uinfo) | |
2348 | { | |
2349 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2350 | ||
2351 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2352 | uinfo->count = 0; | |
2353 | uinfo->count = info->max_channels; | |
2354 | uinfo->value.integer.min = 0; | |
2355 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2356 | return 0; | |
2357 | } | |
2358 | ||
2359 | /* get callback for channel map ctl element | |
2360 | * stores the channel position firstly matching with the current channels | |
2361 | */ | |
2362 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2363 | struct snd_ctl_elem_value *ucontrol) | |
2364 | { | |
2365 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2366 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2367 | struct snd_pcm_substream *substream; | |
2368 | const struct snd_pcm_chmap_elem *map; | |
2369 | ||
2370 | if (snd_BUG_ON(!info->chmap)) | |
2371 | return -EINVAL; | |
2372 | substream = snd_pcm_chmap_substream(info, idx); | |
2373 | if (!substream) | |
2374 | return -ENODEV; | |
2375 | memset(ucontrol->value.integer.value, 0, | |
2376 | sizeof(ucontrol->value.integer.value)); | |
2377 | if (!substream->runtime) | |
2378 | return 0; /* no channels set */ | |
2379 | for (map = info->chmap; map->channels; map++) { | |
2380 | int i; | |
2381 | if (map->channels == substream->runtime->channels && | |
2382 | valid_chmap_channels(info, map->channels)) { | |
2383 | for (i = 0; i < map->channels; i++) | |
2384 | ucontrol->value.integer.value[i] = map->map[i]; | |
2385 | return 0; | |
2386 | } | |
2387 | } | |
2388 | return -EINVAL; | |
2389 | } | |
2390 | ||
2391 | /* tlv callback for channel map ctl element | |
2392 | * expands the pre-defined channel maps in a form of TLV | |
2393 | */ | |
2394 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2395 | unsigned int size, unsigned int __user *tlv) | |
2396 | { | |
2397 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2398 | const struct snd_pcm_chmap_elem *map; | |
2399 | unsigned int __user *dst; | |
2400 | int c, count = 0; | |
2401 | ||
2402 | if (snd_BUG_ON(!info->chmap)) | |
2403 | return -EINVAL; | |
2404 | if (size < 8) | |
2405 | return -ENOMEM; | |
2406 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2407 | return -EFAULT; | |
2408 | size -= 8; | |
2409 | dst = tlv + 2; | |
2410 | for (map = info->chmap; map->channels; map++) { | |
2411 | int chs_bytes = map->channels * 4; | |
2412 | if (!valid_chmap_channels(info, map->channels)) | |
2413 | continue; | |
2414 | if (size < 8) | |
2415 | return -ENOMEM; | |
2416 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2417 | put_user(chs_bytes, dst + 1)) | |
2418 | return -EFAULT; | |
2419 | dst += 2; | |
2420 | size -= 8; | |
2421 | count += 8; | |
2422 | if (size < chs_bytes) | |
2423 | return -ENOMEM; | |
2424 | size -= chs_bytes; | |
2425 | count += chs_bytes; | |
2426 | for (c = 0; c < map->channels; c++) { | |
2427 | if (put_user(map->map[c], dst)) | |
2428 | return -EFAULT; | |
2429 | dst++; | |
2430 | } | |
2431 | } | |
2432 | if (put_user(count, tlv + 1)) | |
2433 | return -EFAULT; | |
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2438 | { | |
2439 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2440 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2441 | kfree(info); | |
2442 | } | |
2443 | ||
2444 | /** | |
2445 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2446 | * @pcm: the assigned PCM instance | |
2447 | * @stream: stream direction | |
2448 | * @chmap: channel map elements (for query) | |
2449 | * @max_channels: the max number of channels for the stream | |
2450 | * @private_value: the value passed to each kcontrol's private_value field | |
2451 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2452 | * | |
2453 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2454 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2455 | */ |
2456 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2457 | const struct snd_pcm_chmap_elem *chmap, | |
2458 | int max_channels, | |
2459 | unsigned long private_value, | |
2460 | struct snd_pcm_chmap **info_ret) | |
2461 | { | |
2462 | struct snd_pcm_chmap *info; | |
2463 | struct snd_kcontrol_new knew = { | |
2464 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2465 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2466 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2467 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2468 | .info = pcm_chmap_ctl_info, | |
2469 | .get = pcm_chmap_ctl_get, | |
2470 | .tlv.c = pcm_chmap_ctl_tlv, | |
2471 | }; | |
2472 | int err; | |
2473 | ||
2474 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2475 | if (!info) | |
2476 | return -ENOMEM; | |
2477 | info->pcm = pcm; | |
2478 | info->stream = stream; | |
2479 | info->chmap = chmap; | |
2480 | info->max_channels = max_channels; | |
2481 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2482 | knew.name = "Playback Channel Map"; | |
2483 | else | |
2484 | knew.name = "Capture Channel Map"; | |
2485 | knew.device = pcm->device; | |
2486 | knew.count = pcm->streams[stream].substream_count; | |
2487 | knew.private_value = private_value; | |
2488 | info->kctl = snd_ctl_new1(&knew, info); | |
2489 | if (!info->kctl) { | |
2490 | kfree(info); | |
2491 | return -ENOMEM; | |
2492 | } | |
2493 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2494 | err = snd_ctl_add(pcm->card, info->kctl); | |
2495 | if (err < 0) | |
2496 | return err; | |
2497 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2498 | if (info_ret) | |
2499 | *info_ret = info; | |
2500 | return 0; | |
2501 | } | |
2502 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |