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> |
1da177e4 LT |
26 | #include <sound/core.h> |
27 | #include <sound/control.h> | |
28 | #include <sound/info.h> | |
29 | #include <sound/pcm.h> | |
30 | #include <sound/pcm_params.h> | |
31 | #include <sound/timer.h> | |
32 | ||
33 | /* | |
34 | * fill ring buffer with silence | |
35 | * runtime->silence_start: starting pointer to silence area | |
36 | * runtime->silence_filled: size filled with silence | |
37 | * runtime->silence_threshold: threshold from application | |
38 | * runtime->silence_size: maximal size from application | |
39 | * | |
40 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
41 | */ | |
877211f5 | 42 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 43 | { |
877211f5 | 44 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
45 | snd_pcm_uframes_t frames, ofs, transfer; |
46 | ||
47 | if (runtime->silence_size < runtime->boundary) { | |
48 | snd_pcm_sframes_t noise_dist, n; | |
49 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
50 | n = runtime->control->appl_ptr - runtime->silence_start; | |
51 | if (n < 0) | |
52 | n += runtime->boundary; | |
53 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
54 | runtime->silence_filled -= n; | |
55 | else | |
56 | runtime->silence_filled = 0; | |
57 | runtime->silence_start = runtime->control->appl_ptr; | |
58 | } | |
235475cb | 59 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 60 | return; |
1da177e4 LT |
61 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
62 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
63 | return; | |
64 | frames = runtime->silence_threshold - noise_dist; | |
65 | if (frames > runtime->silence_size) | |
66 | frames = runtime->silence_size; | |
67 | } else { | |
68 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
69 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
70 | runtime->silence_filled = avail > 0 ? avail : 0; | |
71 | runtime->silence_start = (runtime->status->hw_ptr + | |
72 | runtime->silence_filled) % | |
73 | runtime->boundary; | |
74 | } else { | |
75 | ofs = runtime->status->hw_ptr; | |
76 | frames = new_hw_ptr - ofs; | |
77 | if ((snd_pcm_sframes_t)frames < 0) | |
78 | frames += runtime->boundary; | |
79 | runtime->silence_filled -= frames; | |
80 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
81 | runtime->silence_filled = 0; | |
9a826ddb | 82 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 83 | } else { |
9a826ddb | 84 | runtime->silence_start = ofs; |
1da177e4 | 85 | } |
1da177e4 LT |
86 | } |
87 | frames = runtime->buffer_size - runtime->silence_filled; | |
88 | } | |
7eaa943c TI |
89 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
90 | return; | |
1da177e4 LT |
91 | if (frames == 0) |
92 | return; | |
9a826ddb | 93 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
94 | while (frames > 0) { |
95 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
96 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
97 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
98 | if (substream->ops->silence) { | |
99 | int err; | |
100 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 101 | snd_BUG_ON(err < 0); |
1da177e4 LT |
102 | } else { |
103 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
104 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
105 | } | |
106 | } else { | |
107 | unsigned int c; | |
108 | unsigned int channels = runtime->channels; | |
109 | if (substream->ops->silence) { | |
110 | for (c = 0; c < channels; ++c) { | |
111 | int err; | |
112 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 113 | snd_BUG_ON(err < 0); |
1da177e4 LT |
114 | } |
115 | } else { | |
116 | size_t dma_csize = runtime->dma_bytes / channels; | |
117 | for (c = 0; c < channels; ++c) { | |
118 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
119 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
120 | } | |
121 | } | |
122 | } | |
123 | runtime->silence_filled += transfer; | |
124 | frames -= transfer; | |
125 | ofs = 0; | |
126 | } | |
127 | } | |
128 | ||
c0070110 TI |
129 | static void pcm_debug_name(struct snd_pcm_substream *substream, |
130 | char *name, size_t len) | |
131 | { | |
132 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
133 | substream->pcm->card->number, | |
134 | substream->pcm->device, | |
135 | substream->stream ? 'c' : 'p', | |
136 | substream->number); | |
137 | } | |
138 | ||
741b20cf JK |
139 | #define XRUN_DEBUG_BASIC (1<<0) |
140 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
141 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
142 | #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ | |
143 | #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ | |
4d96eb25 JK |
144 | #define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ |
145 | #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ | |
741b20cf | 146 | |
ed3da3d9 | 147 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 148 | |
741b20cf JK |
149 | #define xrun_debug(substream, mask) \ |
150 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
151 | #else |
152 | #define xrun_debug(substream, mask) 0 | |
153 | #endif | |
ed3da3d9 | 154 | |
741b20cf JK |
155 | #define dump_stack_on_xrun(substream) do { \ |
156 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
157 | dump_stack(); \ | |
ed3da3d9 TI |
158 | } while (0) |
159 | ||
877211f5 | 160 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 161 | { |
13f040f9 JK |
162 | struct snd_pcm_runtime *runtime = substream->runtime; |
163 | ||
164 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
165 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 166 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 167 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 TI |
168 | char name[16]; |
169 | pcm_debug_name(substream, name, sizeof(name)); | |
170 | snd_printd(KERN_DEBUG "XRUN: %s\n", name); | |
ed3da3d9 | 171 | dump_stack_on_xrun(substream); |
1da177e4 | 172 | } |
1da177e4 LT |
173 | } |
174 | ||
0f17014b | 175 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 JK |
176 | #define hw_ptr_error(substream, fmt, args...) \ |
177 | do { \ | |
178 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ | |
f240406b | 179 | xrun_log_show(substream); \ |
4d96eb25 JK |
180 | if (printk_ratelimit()) { \ |
181 | snd_printd("PCM: " fmt, ##args); \ | |
182 | } \ | |
183 | dump_stack_on_xrun(substream); \ | |
184 | } \ | |
185 | } while (0) | |
186 | ||
187 | #define XRUN_LOG_CNT 10 | |
188 | ||
189 | struct hwptr_log_entry { | |
190 | unsigned long jiffies; | |
1da177e4 | 191 | snd_pcm_uframes_t pos; |
4d96eb25 JK |
192 | snd_pcm_uframes_t period_size; |
193 | snd_pcm_uframes_t buffer_size; | |
194 | snd_pcm_uframes_t old_hw_ptr; | |
195 | snd_pcm_uframes_t hw_ptr_base; | |
4d96eb25 | 196 | }; |
1da177e4 | 197 | |
4d96eb25 JK |
198 | struct snd_pcm_hwptr_log { |
199 | unsigned int idx; | |
200 | unsigned int hit: 1; | |
201 | struct hwptr_log_entry entries[XRUN_LOG_CNT]; | |
202 | }; | |
203 | ||
204 | static void xrun_log(struct snd_pcm_substream *substream, | |
205 | snd_pcm_uframes_t pos) | |
206 | { | |
207 | struct snd_pcm_runtime *runtime = substream->runtime; | |
208 | struct snd_pcm_hwptr_log *log = runtime->hwptr_log; | |
209 | struct hwptr_log_entry *entry; | |
210 | ||
211 | if (log == NULL) { | |
212 | log = kzalloc(sizeof(*log), GFP_ATOMIC); | |
213 | if (log == NULL) | |
214 | return; | |
215 | runtime->hwptr_log = log; | |
216 | } else { | |
217 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
218 | return; | |
7c22f1aa | 219 | } |
4d96eb25 JK |
220 | entry = &log->entries[log->idx]; |
221 | entry->jiffies = jiffies; | |
222 | entry->pos = pos; | |
223 | entry->period_size = runtime->period_size; | |
224 | entry->buffer_size = runtime->buffer_size;; | |
225 | entry->old_hw_ptr = runtime->status->hw_ptr; | |
226 | entry->hw_ptr_base = runtime->hw_ptr_base; | |
4d96eb25 | 227 | log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
1da177e4 LT |
228 | } |
229 | ||
4d96eb25 JK |
230 | static void xrun_log_show(struct snd_pcm_substream *substream) |
231 | { | |
232 | struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; | |
233 | struct hwptr_log_entry *entry; | |
234 | char name[16]; | |
235 | unsigned int idx; | |
236 | int cnt; | |
237 | ||
238 | if (log == NULL) | |
239 | return; | |
240 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
241 | return; | |
242 | pcm_debug_name(substream, name, sizeof(name)); | |
243 | for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { | |
244 | entry = &log->entries[idx]; | |
245 | if (entry->period_size == 0) | |
246 | break; | |
f240406b JK |
247 | snd_printd("hwptr log: %s: j=%lu, pos=%ld/%ld/%ld, " |
248 | "hwptr=%ld/%ld\n", | |
4d96eb25 JK |
249 | name, entry->jiffies, (unsigned long)entry->pos, |
250 | (unsigned long)entry->period_size, | |
251 | (unsigned long)entry->buffer_size, | |
252 | (unsigned long)entry->old_hw_ptr, | |
f240406b | 253 | (unsigned long)entry->hw_ptr_base); |
4d96eb25 JK |
254 | idx++; |
255 | idx %= XRUN_LOG_CNT; | |
256 | } | |
257 | log->hit = 1; | |
258 | } | |
259 | ||
260 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ | |
261 | ||
4d96eb25 JK |
262 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
263 | #define xrun_log(substream, pos) do { } while (0) | |
264 | #define xrun_log_show(substream) do { } while (0) | |
265 | ||
266 | #endif | |
267 | ||
1250932e JK |
268 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
269 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
270 | { |
271 | snd_pcm_uframes_t avail; | |
272 | ||
273 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
274 | avail = snd_pcm_playback_avail(runtime); | |
275 | else | |
276 | avail = snd_pcm_capture_avail(runtime); | |
277 | if (avail > runtime->avail_max) | |
278 | runtime->avail_max = avail; | |
4cdc115f TI |
279 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
280 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 281 | snd_pcm_drain_done(substream); |
4cdc115f TI |
282 | return -EPIPE; |
283 | } | |
284 | } else { | |
285 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 286 | xrun(substream); |
4cdc115f TI |
287 | return -EPIPE; |
288 | } | |
1da177e4 | 289 | } |
c91a988d JK |
290 | if (avail >= runtime->control->avail_min) |
291 | wake_up(runtime->twake ? &runtime->tsleep : &runtime->sleep); | |
1da177e4 LT |
292 | return 0; |
293 | } | |
294 | ||
f240406b JK |
295 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
296 | unsigned int in_interrupt) | |
1da177e4 | 297 | { |
877211f5 | 298 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 299 | snd_pcm_uframes_t pos; |
f240406b | 300 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
301 | snd_pcm_sframes_t hdelta, delta; |
302 | unsigned long jdelta; | |
1da177e4 | 303 | |
bbf6ad13 | 304 | old_hw_ptr = runtime->status->hw_ptr; |
f240406b | 305 | pos = substream->ops->pointer(substream); |
1da177e4 LT |
306 | if (pos == SNDRV_PCM_POS_XRUN) { |
307 | xrun(substream); | |
308 | return -EPIPE; | |
309 | } | |
f240406b JK |
310 | if (pos >= runtime->buffer_size) { |
311 | if (printk_ratelimit()) { | |
312 | char name[16]; | |
313 | pcm_debug_name(substream, name, sizeof(name)); | |
314 | xrun_log_show(substream); | |
315 | snd_printd(KERN_ERR "BUG: %s, pos = %ld, " | |
316 | "buffer size = %ld, period size = %ld\n", | |
317 | name, pos, runtime->buffer_size, | |
318 | runtime->period_size); | |
319 | } | |
320 | pos = 0; | |
cedb8118 | 321 | } |
f240406b JK |
322 | pos -= pos % runtime->min_align; |
323 | if (xrun_debug(substream, XRUN_DEBUG_LOG)) | |
324 | xrun_log(substream, pos); | |
ed3da3d9 TI |
325 | hw_base = runtime->hw_ptr_base; |
326 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
327 | if (in_interrupt) { |
328 | /* we know that one period was processed */ | |
329 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 330 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 331 | if (delta > new_hw_ptr) { |
ed3da3d9 | 332 | hw_base += runtime->buffer_size; |
8b22d943 | 333 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
334 | hw_base = 0; |
335 | new_hw_ptr = hw_base + pos; | |
f240406b | 336 | goto __delta; |
1da177e4 | 337 | } |
1da177e4 | 338 | } |
f240406b JK |
339 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
340 | /* pointer crosses the end of the ring buffer */ | |
341 | if (new_hw_ptr < old_hw_ptr) { | |
342 | hw_base += runtime->buffer_size; | |
343 | if (hw_base >= runtime->boundary) | |
344 | hw_base = 0; | |
345 | new_hw_ptr = hw_base + pos; | |
346 | } | |
347 | __delta: | |
348 | delta = (new_hw_ptr - old_hw_ptr) % runtime->boundary; | |
349 | if (xrun_debug(substream, in_interrupt ? | |
350 | XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { | |
351 | char name[16]; | |
352 | pcm_debug_name(substream, name, sizeof(name)); | |
353 | snd_printd("%s_update: %s: pos=%u/%u/%u, " | |
354 | "hwptr=%ld/%ld/%ld/%ld\n", | |
355 | in_interrupt ? "period" : "hwptr", | |
356 | name, | |
357 | (unsigned int)pos, | |
358 | (unsigned int)runtime->period_size, | |
359 | (unsigned int)runtime->buffer_size, | |
360 | (unsigned long)delta, | |
361 | (unsigned long)old_hw_ptr, | |
362 | (unsigned long)new_hw_ptr, | |
363 | (unsigned long)runtime->hw_ptr_base); | |
364 | } | |
365 | /* something must be really wrong */ | |
7b3a177b | 366 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f240406b JK |
367 | hw_ptr_error(substream, |
368 | "Unexpected hw_pointer value %s" | |
369 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, " | |
370 | "old_hw_ptr=%ld)\n", | |
371 | in_interrupt ? "[Q] " : "[P]", | |
372 | substream->stream, (long)pos, | |
373 | (long)new_hw_ptr, (long)old_hw_ptr); | |
374 | return 0; | |
375 | } | |
c87d9732 TI |
376 | |
377 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 378 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
379 | goto no_jiffies_check; |
380 | ||
3e5b5016 TI |
381 | /* Skip the jiffies check for hardwares with BATCH flag. |
382 | * Such hardware usually just increases the position at each IRQ, | |
383 | * thus it can't give any strange position. | |
384 | */ | |
385 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
386 | goto no_jiffies_check; | |
f240406b | 387 | hdelta = delta; |
a4444da3 JK |
388 | if (hdelta < runtime->delay) |
389 | goto no_jiffies_check; | |
390 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
391 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
392 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
393 | delta = jdelta / | |
394 | (((runtime->period_size * HZ) / runtime->rate) | |
395 | + HZ/100); | |
f240406b JK |
396 | /* move new_hw_ptr according jiffies not pos variable */ |
397 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 398 | hw_base = delta; |
f240406b JK |
399 | /* use loop to avoid checks for delta overflows */ |
400 | /* the delta value is small or zero in most cases */ | |
401 | while (delta > 0) { | |
402 | new_hw_ptr += runtime->period_size; | |
403 | if (new_hw_ptr >= runtime->boundary) | |
404 | new_hw_ptr -= runtime->boundary; | |
405 | delta--; | |
406 | } | |
407 | /* align hw_base to buffer_size */ | |
bbf6ad13 | 408 | hw_ptr_error(substream, |
f240406b | 409 | "hw_ptr skipping! %s" |
bbf6ad13 | 410 | "(pos=%ld, delta=%ld, period=%ld, " |
f240406b JK |
411 | "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
412 | in_interrupt ? "[Q] " : "", | |
bbf6ad13 JK |
413 | (long)pos, (long)hdelta, |
414 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 415 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
416 | (unsigned long)old_hw_ptr, |
417 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
418 | /* reset values to proper state */ |
419 | delta = 0; | |
420 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 421 | } |
3e5b5016 | 422 | no_jiffies_check: |
bbf6ad13 | 423 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 | 424 | hw_ptr_error(substream, |
f240406b JK |
425 | "Lost interrupts? %s" |
426 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, " | |
427 | "old_hw_ptr=%ld)\n", | |
428 | in_interrupt ? "[Q] " : "", | |
ed3da3d9 | 429 | substream->stream, (long)delta, |
f240406b JK |
430 | (long)new_hw_ptr, |
431 | (long)old_hw_ptr); | |
ed3da3d9 | 432 | } |
f240406b JK |
433 | |
434 | if (runtime->status->hw_ptr == new_hw_ptr) | |
435 | return 0; | |
ab1863fc | 436 | |
1da177e4 LT |
437 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
438 | runtime->silence_size > 0) | |
439 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
440 | ||
e7636925 JK |
441 | if (in_interrupt) { |
442 | runtime->hw_ptr_interrupt = new_hw_ptr - | |
443 | (new_hw_ptr % runtime->period_size); | |
444 | } | |
ed3da3d9 | 445 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 446 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 447 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
448 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
449 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 450 | |
1250932e | 451 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
452 | } |
453 | ||
454 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 455 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 456 | { |
f240406b | 457 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
458 | } |
459 | ||
460 | /** | |
461 | * snd_pcm_set_ops - set the PCM operators | |
462 | * @pcm: the pcm instance | |
463 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
464 | * @ops: the operator table | |
465 | * | |
466 | * Sets the given PCM operators to the pcm instance. | |
467 | */ | |
877211f5 | 468 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 469 | { |
877211f5 TI |
470 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
471 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
472 | |
473 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
474 | substream->ops = ops; | |
475 | } | |
476 | ||
e88e8ae6 | 477 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
478 | |
479 | /** | |
480 | * snd_pcm_sync - set the PCM sync id | |
481 | * @substream: the pcm substream | |
482 | * | |
483 | * Sets the PCM sync identifier for the card. | |
484 | */ | |
877211f5 | 485 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 486 | { |
877211f5 | 487 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
488 | |
489 | runtime->sync.id32[0] = substream->pcm->card->number; | |
490 | runtime->sync.id32[1] = -1; | |
491 | runtime->sync.id32[2] = -1; | |
492 | runtime->sync.id32[3] = -1; | |
493 | } | |
494 | ||
e88e8ae6 TI |
495 | EXPORT_SYMBOL(snd_pcm_set_sync); |
496 | ||
1da177e4 LT |
497 | /* |
498 | * Standard ioctl routine | |
499 | */ | |
500 | ||
1da177e4 LT |
501 | static inline unsigned int div32(unsigned int a, unsigned int b, |
502 | unsigned int *r) | |
503 | { | |
504 | if (b == 0) { | |
505 | *r = 0; | |
506 | return UINT_MAX; | |
507 | } | |
508 | *r = a % b; | |
509 | return a / b; | |
510 | } | |
511 | ||
512 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
513 | { | |
514 | if (b == 0) | |
515 | return UINT_MAX; | |
516 | return a / b; | |
517 | } | |
518 | ||
519 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
520 | { | |
521 | unsigned int r; | |
522 | unsigned int q; | |
523 | if (b == 0) | |
524 | return UINT_MAX; | |
525 | q = div32(a, b, &r); | |
526 | if (r) | |
527 | ++q; | |
528 | return q; | |
529 | } | |
530 | ||
531 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
532 | { | |
533 | if (a == 0) | |
534 | return 0; | |
535 | if (div_down(UINT_MAX, a) < b) | |
536 | return UINT_MAX; | |
537 | return a * b; | |
538 | } | |
539 | ||
540 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
541 | unsigned int c, unsigned int *r) | |
542 | { | |
543 | u_int64_t n = (u_int64_t) a * b; | |
544 | if (c == 0) { | |
7eaa943c | 545 | snd_BUG_ON(!n); |
1da177e4 LT |
546 | *r = 0; |
547 | return UINT_MAX; | |
548 | } | |
3f7440a6 | 549 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
550 | if (n >= UINT_MAX) { |
551 | *r = 0; | |
552 | return UINT_MAX; | |
553 | } | |
554 | return n; | |
555 | } | |
556 | ||
1da177e4 LT |
557 | /** |
558 | * snd_interval_refine - refine the interval value of configurator | |
559 | * @i: the interval value to refine | |
560 | * @v: the interval value to refer to | |
561 | * | |
562 | * Refines the interval value with the reference value. | |
563 | * The interval is changed to the range satisfying both intervals. | |
564 | * The interval status (min, max, integer, etc.) are evaluated. | |
565 | * | |
566 | * Returns non-zero if the value is changed, zero if not changed. | |
567 | */ | |
877211f5 | 568 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
569 | { |
570 | int changed = 0; | |
7eaa943c TI |
571 | if (snd_BUG_ON(snd_interval_empty(i))) |
572 | return -EINVAL; | |
1da177e4 LT |
573 | if (i->min < v->min) { |
574 | i->min = v->min; | |
575 | i->openmin = v->openmin; | |
576 | changed = 1; | |
577 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
578 | i->openmin = 1; | |
579 | changed = 1; | |
580 | } | |
581 | if (i->max > v->max) { | |
582 | i->max = v->max; | |
583 | i->openmax = v->openmax; | |
584 | changed = 1; | |
585 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
586 | i->openmax = 1; | |
587 | changed = 1; | |
588 | } | |
589 | if (!i->integer && v->integer) { | |
590 | i->integer = 1; | |
591 | changed = 1; | |
592 | } | |
593 | if (i->integer) { | |
594 | if (i->openmin) { | |
595 | i->min++; | |
596 | i->openmin = 0; | |
597 | } | |
598 | if (i->openmax) { | |
599 | i->max--; | |
600 | i->openmax = 0; | |
601 | } | |
602 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
603 | i->integer = 1; | |
604 | if (snd_interval_checkempty(i)) { | |
605 | snd_interval_none(i); | |
606 | return -EINVAL; | |
607 | } | |
608 | return changed; | |
609 | } | |
610 | ||
e88e8ae6 TI |
611 | EXPORT_SYMBOL(snd_interval_refine); |
612 | ||
877211f5 | 613 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 614 | { |
7eaa943c TI |
615 | if (snd_BUG_ON(snd_interval_empty(i))) |
616 | return -EINVAL; | |
1da177e4 LT |
617 | if (snd_interval_single(i)) |
618 | return 0; | |
619 | i->max = i->min; | |
620 | i->openmax = i->openmin; | |
621 | if (i->openmax) | |
622 | i->max++; | |
623 | return 1; | |
624 | } | |
625 | ||
877211f5 | 626 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 627 | { |
7eaa943c TI |
628 | if (snd_BUG_ON(snd_interval_empty(i))) |
629 | return -EINVAL; | |
1da177e4 LT |
630 | if (snd_interval_single(i)) |
631 | return 0; | |
632 | i->min = i->max; | |
633 | i->openmin = i->openmax; | |
634 | if (i->openmin) | |
635 | i->min--; | |
636 | return 1; | |
637 | } | |
638 | ||
877211f5 | 639 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
640 | { |
641 | if (a->empty || b->empty) { | |
642 | snd_interval_none(c); | |
643 | return; | |
644 | } | |
645 | c->empty = 0; | |
646 | c->min = mul(a->min, b->min); | |
647 | c->openmin = (a->openmin || b->openmin); | |
648 | c->max = mul(a->max, b->max); | |
649 | c->openmax = (a->openmax || b->openmax); | |
650 | c->integer = (a->integer && b->integer); | |
651 | } | |
652 | ||
653 | /** | |
654 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
655 | * @a: dividend |
656 | * @b: divisor | |
657 | * @c: quotient | |
1da177e4 LT |
658 | * |
659 | * c = a / b | |
660 | * | |
661 | * Returns non-zero if the value is changed, zero if not changed. | |
662 | */ | |
877211f5 | 663 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
664 | { |
665 | unsigned int r; | |
666 | if (a->empty || b->empty) { | |
667 | snd_interval_none(c); | |
668 | return; | |
669 | } | |
670 | c->empty = 0; | |
671 | c->min = div32(a->min, b->max, &r); | |
672 | c->openmin = (r || a->openmin || b->openmax); | |
673 | if (b->min > 0) { | |
674 | c->max = div32(a->max, b->min, &r); | |
675 | if (r) { | |
676 | c->max++; | |
677 | c->openmax = 1; | |
678 | } else | |
679 | c->openmax = (a->openmax || b->openmin); | |
680 | } else { | |
681 | c->max = UINT_MAX; | |
682 | c->openmax = 0; | |
683 | } | |
684 | c->integer = 0; | |
685 | } | |
686 | ||
687 | /** | |
688 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
689 | * @a: dividend 1 |
690 | * @b: dividend 2 | |
691 | * @k: divisor (as integer) | |
692 | * @c: result | |
693 | * | |
1da177e4 LT |
694 | * c = a * b / k |
695 | * | |
696 | * Returns non-zero if the value is changed, zero if not changed. | |
697 | */ | |
877211f5 TI |
698 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
699 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
700 | { |
701 | unsigned int r; | |
702 | if (a->empty || b->empty) { | |
703 | snd_interval_none(c); | |
704 | return; | |
705 | } | |
706 | c->empty = 0; | |
707 | c->min = muldiv32(a->min, b->min, k, &r); | |
708 | c->openmin = (r || a->openmin || b->openmin); | |
709 | c->max = muldiv32(a->max, b->max, k, &r); | |
710 | if (r) { | |
711 | c->max++; | |
712 | c->openmax = 1; | |
713 | } else | |
714 | c->openmax = (a->openmax || b->openmax); | |
715 | c->integer = 0; | |
716 | } | |
717 | ||
718 | /** | |
719 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
720 | * @a: dividend 1 |
721 | * @k: dividend 2 (as integer) | |
722 | * @b: divisor | |
723 | * @c: result | |
1da177e4 LT |
724 | * |
725 | * c = a * k / b | |
726 | * | |
727 | * Returns non-zero if the value is changed, zero if not changed. | |
728 | */ | |
877211f5 TI |
729 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
730 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
731 | { |
732 | unsigned int r; | |
733 | if (a->empty || b->empty) { | |
734 | snd_interval_none(c); | |
735 | return; | |
736 | } | |
737 | c->empty = 0; | |
738 | c->min = muldiv32(a->min, k, b->max, &r); | |
739 | c->openmin = (r || a->openmin || b->openmax); | |
740 | if (b->min > 0) { | |
741 | c->max = muldiv32(a->max, k, b->min, &r); | |
742 | if (r) { | |
743 | c->max++; | |
744 | c->openmax = 1; | |
745 | } else | |
746 | c->openmax = (a->openmax || b->openmin); | |
747 | } else { | |
748 | c->max = UINT_MAX; | |
749 | c->openmax = 0; | |
750 | } | |
751 | c->integer = 0; | |
752 | } | |
753 | ||
1da177e4 LT |
754 | /* ---- */ |
755 | ||
756 | ||
757 | /** | |
758 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
759 | * @i: interval to refine |
760 | * @rats_count: number of ratnum_t | |
761 | * @rats: ratnum_t array | |
762 | * @nump: pointer to store the resultant numerator | |
763 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
764 | * |
765 | * Returns non-zero if the value is changed, zero if not changed. | |
766 | */ | |
877211f5 TI |
767 | int snd_interval_ratnum(struct snd_interval *i, |
768 | unsigned int rats_count, struct snd_ratnum *rats, | |
769 | unsigned int *nump, unsigned int *denp) | |
1da177e4 | 770 | { |
8374e24c KH |
771 | unsigned int best_num, best_den; |
772 | int best_diff; | |
1da177e4 | 773 | unsigned int k; |
877211f5 | 774 | struct snd_interval t; |
1da177e4 | 775 | int err; |
8374e24c KH |
776 | unsigned int result_num, result_den; |
777 | int result_diff; | |
1da177e4 LT |
778 | |
779 | best_num = best_den = best_diff = 0; | |
780 | for (k = 0; k < rats_count; ++k) { | |
781 | unsigned int num = rats[k].num; | |
782 | unsigned int den; | |
783 | unsigned int q = i->min; | |
784 | int diff; | |
785 | if (q == 0) | |
786 | q = 1; | |
40962d7c | 787 | den = div_up(num, q); |
1da177e4 LT |
788 | if (den < rats[k].den_min) |
789 | continue; | |
790 | if (den > rats[k].den_max) | |
791 | den = rats[k].den_max; | |
792 | else { | |
793 | unsigned int r; | |
794 | r = (den - rats[k].den_min) % rats[k].den_step; | |
795 | if (r != 0) | |
796 | den -= r; | |
797 | } | |
798 | diff = num - q * den; | |
8374e24c KH |
799 | if (diff < 0) |
800 | diff = -diff; | |
1da177e4 LT |
801 | if (best_num == 0 || |
802 | diff * best_den < best_diff * den) { | |
803 | best_diff = diff; | |
804 | best_den = den; | |
805 | best_num = num; | |
806 | } | |
807 | } | |
808 | if (best_den == 0) { | |
809 | i->empty = 1; | |
810 | return -EINVAL; | |
811 | } | |
812 | t.min = div_down(best_num, best_den); | |
813 | t.openmin = !!(best_num % best_den); | |
814 | ||
8374e24c KH |
815 | result_num = best_num; |
816 | result_diff = best_diff; | |
817 | result_den = best_den; | |
1da177e4 LT |
818 | best_num = best_den = best_diff = 0; |
819 | for (k = 0; k < rats_count; ++k) { | |
820 | unsigned int num = rats[k].num; | |
821 | unsigned int den; | |
822 | unsigned int q = i->max; | |
823 | int diff; | |
824 | if (q == 0) { | |
825 | i->empty = 1; | |
826 | return -EINVAL; | |
827 | } | |
40962d7c | 828 | den = div_down(num, q); |
1da177e4 LT |
829 | if (den > rats[k].den_max) |
830 | continue; | |
831 | if (den < rats[k].den_min) | |
832 | den = rats[k].den_min; | |
833 | else { | |
834 | unsigned int r; | |
835 | r = (den - rats[k].den_min) % rats[k].den_step; | |
836 | if (r != 0) | |
837 | den += rats[k].den_step - r; | |
838 | } | |
839 | diff = q * den - num; | |
8374e24c KH |
840 | if (diff < 0) |
841 | diff = -diff; | |
1da177e4 LT |
842 | if (best_num == 0 || |
843 | diff * best_den < best_diff * den) { | |
844 | best_diff = diff; | |
845 | best_den = den; | |
846 | best_num = num; | |
847 | } | |
848 | } | |
849 | if (best_den == 0) { | |
850 | i->empty = 1; | |
851 | return -EINVAL; | |
852 | } | |
853 | t.max = div_up(best_num, best_den); | |
854 | t.openmax = !!(best_num % best_den); | |
855 | t.integer = 0; | |
856 | err = snd_interval_refine(i, &t); | |
857 | if (err < 0) | |
858 | return err; | |
859 | ||
860 | if (snd_interval_single(i)) { | |
8374e24c KH |
861 | if (best_diff * result_den < result_diff * best_den) { |
862 | result_num = best_num; | |
863 | result_den = best_den; | |
864 | } | |
1da177e4 | 865 | if (nump) |
8374e24c | 866 | *nump = result_num; |
1da177e4 | 867 | if (denp) |
8374e24c | 868 | *denp = result_den; |
1da177e4 LT |
869 | } |
870 | return err; | |
871 | } | |
872 | ||
e88e8ae6 TI |
873 | EXPORT_SYMBOL(snd_interval_ratnum); |
874 | ||
1da177e4 LT |
875 | /** |
876 | * snd_interval_ratden - refine the interval value | |
df8db936 | 877 | * @i: interval to refine |
877211f5 TI |
878 | * @rats_count: number of struct ratden |
879 | * @rats: struct ratden array | |
df8db936 TI |
880 | * @nump: pointer to store the resultant numerator |
881 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
882 | * |
883 | * Returns non-zero if the value is changed, zero if not changed. | |
884 | */ | |
877211f5 TI |
885 | static int snd_interval_ratden(struct snd_interval *i, |
886 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
887 | unsigned int *nump, unsigned int *denp) |
888 | { | |
889 | unsigned int best_num, best_diff, best_den; | |
890 | unsigned int k; | |
877211f5 | 891 | struct snd_interval t; |
1da177e4 LT |
892 | int err; |
893 | ||
894 | best_num = best_den = best_diff = 0; | |
895 | for (k = 0; k < rats_count; ++k) { | |
896 | unsigned int num; | |
897 | unsigned int den = rats[k].den; | |
898 | unsigned int q = i->min; | |
899 | int diff; | |
900 | num = mul(q, den); | |
901 | if (num > rats[k].num_max) | |
902 | continue; | |
903 | if (num < rats[k].num_min) | |
904 | num = rats[k].num_max; | |
905 | else { | |
906 | unsigned int r; | |
907 | r = (num - rats[k].num_min) % rats[k].num_step; | |
908 | if (r != 0) | |
909 | num += rats[k].num_step - r; | |
910 | } | |
911 | diff = num - q * den; | |
912 | if (best_num == 0 || | |
913 | diff * best_den < best_diff * den) { | |
914 | best_diff = diff; | |
915 | best_den = den; | |
916 | best_num = num; | |
917 | } | |
918 | } | |
919 | if (best_den == 0) { | |
920 | i->empty = 1; | |
921 | return -EINVAL; | |
922 | } | |
923 | t.min = div_down(best_num, best_den); | |
924 | t.openmin = !!(best_num % best_den); | |
925 | ||
926 | best_num = best_den = best_diff = 0; | |
927 | for (k = 0; k < rats_count; ++k) { | |
928 | unsigned int num; | |
929 | unsigned int den = rats[k].den; | |
930 | unsigned int q = i->max; | |
931 | int diff; | |
932 | num = mul(q, den); | |
933 | if (num < rats[k].num_min) | |
934 | continue; | |
935 | if (num > rats[k].num_max) | |
936 | num = rats[k].num_max; | |
937 | else { | |
938 | unsigned int r; | |
939 | r = (num - rats[k].num_min) % rats[k].num_step; | |
940 | if (r != 0) | |
941 | num -= r; | |
942 | } | |
943 | diff = q * den - num; | |
944 | if (best_num == 0 || | |
945 | diff * best_den < best_diff * den) { | |
946 | best_diff = diff; | |
947 | best_den = den; | |
948 | best_num = num; | |
949 | } | |
950 | } | |
951 | if (best_den == 0) { | |
952 | i->empty = 1; | |
953 | return -EINVAL; | |
954 | } | |
955 | t.max = div_up(best_num, best_den); | |
956 | t.openmax = !!(best_num % best_den); | |
957 | t.integer = 0; | |
958 | err = snd_interval_refine(i, &t); | |
959 | if (err < 0) | |
960 | return err; | |
961 | ||
962 | if (snd_interval_single(i)) { | |
963 | if (nump) | |
964 | *nump = best_num; | |
965 | if (denp) | |
966 | *denp = best_den; | |
967 | } | |
968 | return err; | |
969 | } | |
970 | ||
971 | /** | |
972 | * snd_interval_list - refine the interval value from the list | |
973 | * @i: the interval value to refine | |
974 | * @count: the number of elements in the list | |
975 | * @list: the value list | |
976 | * @mask: the bit-mask to evaluate | |
977 | * | |
978 | * Refines the interval value from the list. | |
979 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
980 | * evaluated. | |
981 | * | |
982 | * Returns non-zero if the value is changed, zero if not changed. | |
983 | */ | |
877211f5 | 984 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
985 | { |
986 | unsigned int k; | |
b1ddaf68 | 987 | struct snd_interval list_range; |
0981a260 TI |
988 | |
989 | if (!count) { | |
990 | i->empty = 1; | |
991 | return -EINVAL; | |
992 | } | |
b1ddaf68 CL |
993 | snd_interval_any(&list_range); |
994 | list_range.min = UINT_MAX; | |
995 | list_range.max = 0; | |
1da177e4 LT |
996 | for (k = 0; k < count; k++) { |
997 | if (mask && !(mask & (1 << k))) | |
998 | continue; | |
b1ddaf68 | 999 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1000 | continue; |
b1ddaf68 CL |
1001 | list_range.min = min(list_range.min, list[k]); |
1002 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1003 | } |
b1ddaf68 | 1004 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1005 | } |
1006 | ||
e88e8ae6 TI |
1007 | EXPORT_SYMBOL(snd_interval_list); |
1008 | ||
877211f5 | 1009 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
1010 | { |
1011 | unsigned int n; | |
1012 | int changed = 0; | |
1013 | n = (i->min - min) % step; | |
1014 | if (n != 0 || i->openmin) { | |
1015 | i->min += step - n; | |
1016 | changed = 1; | |
1017 | } | |
1018 | n = (i->max - min) % step; | |
1019 | if (n != 0 || i->openmax) { | |
1020 | i->max -= n; | |
1021 | changed = 1; | |
1022 | } | |
1023 | if (snd_interval_checkempty(i)) { | |
1024 | i->empty = 1; | |
1025 | return -EINVAL; | |
1026 | } | |
1027 | return changed; | |
1028 | } | |
1029 | ||
1030 | /* Info constraints helpers */ | |
1031 | ||
1032 | /** | |
1033 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1034 | * @runtime: the pcm runtime instance | |
1035 | * @cond: condition bits | |
1036 | * @var: the variable to evaluate | |
1037 | * @func: the evaluation function | |
1038 | * @private: the private data pointer passed to function | |
1039 | * @dep: the dependent variables | |
1040 | * | |
1041 | * Returns zero if successful, or a negative error code on failure. | |
1042 | */ | |
877211f5 | 1043 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1044 | int var, |
1045 | snd_pcm_hw_rule_func_t func, void *private, | |
1046 | int dep, ...) | |
1047 | { | |
877211f5 TI |
1048 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1049 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1050 | unsigned int k; |
1051 | va_list args; | |
1052 | va_start(args, dep); | |
1053 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1054 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1055 | unsigned int new_rules = constrs->rules_all + 16; |
1056 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
1057 | if (!new) | |
1058 | return -ENOMEM; | |
1059 | if (constrs->rules) { | |
1060 | memcpy(new, constrs->rules, | |
1061 | constrs->rules_num * sizeof(*c)); | |
1062 | kfree(constrs->rules); | |
1063 | } | |
1064 | constrs->rules = new; | |
1065 | constrs->rules_all = new_rules; | |
1066 | } | |
1067 | c = &constrs->rules[constrs->rules_num]; | |
1068 | c->cond = cond; | |
1069 | c->func = func; | |
1070 | c->var = var; | |
1071 | c->private = private; | |
1072 | k = 0; | |
1073 | while (1) { | |
7eaa943c TI |
1074 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1075 | return -EINVAL; | |
1da177e4 LT |
1076 | c->deps[k++] = dep; |
1077 | if (dep < 0) | |
1078 | break; | |
1079 | dep = va_arg(args, int); | |
1080 | } | |
1081 | constrs->rules_num++; | |
1082 | va_end(args); | |
1083 | return 0; | |
1084 | } | |
1085 | ||
e88e8ae6 TI |
1086 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1087 | ||
1da177e4 | 1088 | /** |
1c85cc64 | 1089 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1090 | * @runtime: PCM runtime instance |
1091 | * @var: hw_params variable to apply the mask | |
1092 | * @mask: the bitmap mask | |
1093 | * | |
1c85cc64 | 1094 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1095 | */ |
877211f5 | 1096 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1097 | u_int32_t mask) |
1098 | { | |
877211f5 TI |
1099 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1100 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1101 | *maskp->bits &= mask; |
1102 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1103 | if (*maskp->bits == 0) | |
1104 | return -EINVAL; | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | /** | |
1c85cc64 | 1109 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1110 | * @runtime: PCM runtime instance |
1111 | * @var: hw_params variable to apply the mask | |
1112 | * @mask: the 64bit bitmap mask | |
1113 | * | |
1c85cc64 | 1114 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1115 | */ |
877211f5 | 1116 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1117 | u_int64_t mask) |
1118 | { | |
877211f5 TI |
1119 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1120 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1121 | maskp->bits[0] &= (u_int32_t)mask; |
1122 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1123 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1124 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1125 | return -EINVAL; | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | /** | |
1c85cc64 | 1130 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1131 | * @runtime: PCM runtime instance |
1132 | * @var: hw_params variable to apply the integer constraint | |
1133 | * | |
1134 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1135 | */ |
877211f5 | 1136 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1137 | { |
877211f5 | 1138 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1139 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1140 | } | |
1141 | ||
e88e8ae6 TI |
1142 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1143 | ||
1da177e4 | 1144 | /** |
1c85cc64 | 1145 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1146 | * @runtime: PCM runtime instance |
1147 | * @var: hw_params variable to apply the range | |
1148 | * @min: the minimal value | |
1149 | * @max: the maximal value | |
1150 | * | |
1151 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1152 | */ |
877211f5 | 1153 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1154 | unsigned int min, unsigned int max) |
1155 | { | |
877211f5 TI |
1156 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1157 | struct snd_interval t; | |
1da177e4 LT |
1158 | t.min = min; |
1159 | t.max = max; | |
1160 | t.openmin = t.openmax = 0; | |
1161 | t.integer = 0; | |
1162 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1163 | } | |
1164 | ||
e88e8ae6 TI |
1165 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1166 | ||
877211f5 TI |
1167 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1168 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1169 | { |
877211f5 | 1170 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1171 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1172 | } | |
1173 | ||
1174 | ||
1175 | /** | |
1c85cc64 | 1176 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1177 | * @runtime: PCM runtime instance |
1178 | * @cond: condition bits | |
1179 | * @var: hw_params variable to apply the list constraint | |
1180 | * @l: list | |
1181 | * | |
1182 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1183 | */ |
877211f5 | 1184 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1185 | unsigned int cond, |
1186 | snd_pcm_hw_param_t var, | |
877211f5 | 1187 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1188 | { |
1189 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1190 | snd_pcm_hw_rule_list, l, | |
1191 | var, -1); | |
1192 | } | |
1193 | ||
e88e8ae6 TI |
1194 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1195 | ||
877211f5 TI |
1196 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1197 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1198 | { |
877211f5 | 1199 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1200 | unsigned int num = 0, den = 0; |
1201 | int err; | |
1202 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1203 | r->nrats, r->rats, &num, &den); | |
1204 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1205 | params->rate_num = num; | |
1206 | params->rate_den = den; | |
1207 | } | |
1208 | return err; | |
1209 | } | |
1210 | ||
1211 | /** | |
1c85cc64 | 1212 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1213 | * @runtime: PCM runtime instance |
1214 | * @cond: condition bits | |
1215 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1216 | * @r: struct snd_ratnums constriants |
1da177e4 | 1217 | */ |
877211f5 | 1218 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1219 | unsigned int cond, |
1220 | snd_pcm_hw_param_t var, | |
877211f5 | 1221 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1222 | { |
1223 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1224 | snd_pcm_hw_rule_ratnums, r, | |
1225 | var, -1); | |
1226 | } | |
1227 | ||
e88e8ae6 TI |
1228 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1229 | ||
877211f5 TI |
1230 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1231 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1232 | { |
877211f5 | 1233 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1234 | unsigned int num = 0, den = 0; |
1235 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1236 | r->nrats, r->rats, &num, &den); | |
1237 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1238 | params->rate_num = num; | |
1239 | params->rate_den = den; | |
1240 | } | |
1241 | return err; | |
1242 | } | |
1243 | ||
1244 | /** | |
1c85cc64 | 1245 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1246 | * @runtime: PCM runtime instance |
1247 | * @cond: condition bits | |
1248 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1249 | * @r: struct snd_ratdens constriants |
1da177e4 | 1250 | */ |
877211f5 | 1251 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1252 | unsigned int cond, |
1253 | snd_pcm_hw_param_t var, | |
877211f5 | 1254 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1255 | { |
1256 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1257 | snd_pcm_hw_rule_ratdens, r, | |
1258 | var, -1); | |
1259 | } | |
1260 | ||
e88e8ae6 TI |
1261 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1262 | ||
877211f5 TI |
1263 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1264 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1265 | { |
1266 | unsigned int l = (unsigned long) rule->private; | |
1267 | int width = l & 0xffff; | |
1268 | unsigned int msbits = l >> 16; | |
877211f5 | 1269 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1270 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1271 | params->msbits = msbits; | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | /** | |
1c85cc64 | 1276 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1277 | * @runtime: PCM runtime instance |
1278 | * @cond: condition bits | |
1279 | * @width: sample bits width | |
1280 | * @msbits: msbits width | |
1da177e4 | 1281 | */ |
877211f5 | 1282 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1283 | unsigned int cond, |
1284 | unsigned int width, | |
1285 | unsigned int msbits) | |
1286 | { | |
1287 | unsigned long l = (msbits << 16) | width; | |
1288 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1289 | snd_pcm_hw_rule_msbits, | |
1290 | (void*) l, | |
1291 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1292 | } | |
1293 | ||
e88e8ae6 TI |
1294 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1295 | ||
877211f5 TI |
1296 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1297 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1298 | { |
1299 | unsigned long step = (unsigned long) rule->private; | |
1300 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1301 | } | |
1302 | ||
1303 | /** | |
1c85cc64 | 1304 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1305 | * @runtime: PCM runtime instance |
1306 | * @cond: condition bits | |
1307 | * @var: hw_params variable to apply the step constraint | |
1308 | * @step: step size | |
1da177e4 | 1309 | */ |
877211f5 | 1310 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1311 | unsigned int cond, |
1312 | snd_pcm_hw_param_t var, | |
1313 | unsigned long step) | |
1314 | { | |
1315 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1316 | snd_pcm_hw_rule_step, (void *) step, | |
1317 | var, -1); | |
1318 | } | |
1319 | ||
e88e8ae6 TI |
1320 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1321 | ||
877211f5 | 1322 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1323 | { |
67c39317 | 1324 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1325 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1326 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1327 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1328 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1329 | }; | |
1330 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1331 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1332 | } | |
1333 | ||
1334 | /** | |
1c85cc64 | 1335 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1336 | * @runtime: PCM runtime instance |
1337 | * @cond: condition bits | |
1338 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1339 | */ |
877211f5 | 1340 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1341 | unsigned int cond, |
1342 | snd_pcm_hw_param_t var) | |
1343 | { | |
1344 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1345 | snd_pcm_hw_rule_pow2, NULL, | |
1346 | var, -1); | |
1347 | } | |
1348 | ||
e88e8ae6 TI |
1349 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1350 | ||
877211f5 | 1351 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1352 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1353 | { |
1354 | if (hw_is_mask(var)) { | |
1355 | snd_mask_any(hw_param_mask(params, var)); | |
1356 | params->cmask |= 1 << var; | |
1357 | params->rmask |= 1 << var; | |
1358 | return; | |
1359 | } | |
1360 | if (hw_is_interval(var)) { | |
1361 | snd_interval_any(hw_param_interval(params, var)); | |
1362 | params->cmask |= 1 << var; | |
1363 | params->rmask |= 1 << var; | |
1364 | return; | |
1365 | } | |
1366 | snd_BUG(); | |
1367 | } | |
1368 | ||
877211f5 | 1369 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1370 | { |
1371 | unsigned int k; | |
1372 | memset(params, 0, sizeof(*params)); | |
1373 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1374 | _snd_pcm_hw_param_any(params, k); | |
1375 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1376 | _snd_pcm_hw_param_any(params, k); | |
1377 | params->info = ~0U; | |
1378 | } | |
1379 | ||
e88e8ae6 | 1380 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1381 | |
1382 | /** | |
1c85cc64 | 1383 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1384 | * @params: the hw_params instance |
1385 | * @var: parameter to retrieve | |
1c85cc64 | 1386 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1387 | * |
1c85cc64 RD |
1388 | * Return the value for field @var if it's fixed in configuration space |
1389 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1390 | */ |
e88e8ae6 TI |
1391 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1392 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1393 | { |
1394 | if (hw_is_mask(var)) { | |
877211f5 | 1395 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1396 | if (!snd_mask_single(mask)) |
1397 | return -EINVAL; | |
1398 | if (dir) | |
1399 | *dir = 0; | |
1400 | return snd_mask_value(mask); | |
1401 | } | |
1402 | if (hw_is_interval(var)) { | |
877211f5 | 1403 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1404 | if (!snd_interval_single(i)) |
1405 | return -EINVAL; | |
1406 | if (dir) | |
1407 | *dir = i->openmin; | |
1408 | return snd_interval_value(i); | |
1409 | } | |
1da177e4 LT |
1410 | return -EINVAL; |
1411 | } | |
1412 | ||
e88e8ae6 | 1413 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1414 | |
877211f5 | 1415 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1416 | snd_pcm_hw_param_t var) |
1417 | { | |
1418 | if (hw_is_mask(var)) { | |
1419 | snd_mask_none(hw_param_mask(params, var)); | |
1420 | params->cmask |= 1 << var; | |
1421 | params->rmask |= 1 << var; | |
1422 | } else if (hw_is_interval(var)) { | |
1423 | snd_interval_none(hw_param_interval(params, var)); | |
1424 | params->cmask |= 1 << var; | |
1425 | params->rmask |= 1 << var; | |
1426 | } else { | |
1427 | snd_BUG(); | |
1428 | } | |
1429 | } | |
1430 | ||
e88e8ae6 | 1431 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1432 | |
877211f5 | 1433 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1434 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1435 | { |
1436 | int changed; | |
1437 | if (hw_is_mask(var)) | |
1438 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1439 | else if (hw_is_interval(var)) | |
1440 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1441 | else |
1da177e4 | 1442 | return -EINVAL; |
1da177e4 LT |
1443 | if (changed) { |
1444 | params->cmask |= 1 << var; | |
1445 | params->rmask |= 1 << var; | |
1446 | } | |
1447 | return changed; | |
1448 | } | |
1449 | ||
1450 | ||
1451 | /** | |
1c85cc64 | 1452 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1453 | * @pcm: PCM instance |
1454 | * @params: the hw_params instance | |
1455 | * @var: parameter to retrieve | |
1c85cc64 | 1456 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1457 | * |
1c85cc64 | 1458 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1459 | * values > minimum. Reduce configuration space accordingly. |
1460 | * Return the minimum. | |
1461 | */ | |
e88e8ae6 TI |
1462 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1463 | struct snd_pcm_hw_params *params, | |
1464 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1465 | { |
1466 | int changed = _snd_pcm_hw_param_first(params, var); | |
1467 | if (changed < 0) | |
1468 | return changed; | |
1469 | if (params->rmask) { | |
1470 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1471 | if (snd_BUG_ON(err < 0)) |
1472 | return err; | |
1da177e4 LT |
1473 | } |
1474 | return snd_pcm_hw_param_value(params, var, dir); | |
1475 | } | |
1476 | ||
e88e8ae6 TI |
1477 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1478 | ||
877211f5 | 1479 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1480 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1481 | { |
1482 | int changed; | |
1483 | if (hw_is_mask(var)) | |
1484 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1485 | else if (hw_is_interval(var)) | |
1486 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1487 | else |
1da177e4 | 1488 | return -EINVAL; |
1da177e4 LT |
1489 | if (changed) { |
1490 | params->cmask |= 1 << var; | |
1491 | params->rmask |= 1 << var; | |
1492 | } | |
1493 | return changed; | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /** | |
1c85cc64 | 1498 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1499 | * @pcm: PCM instance |
1500 | * @params: the hw_params instance | |
1501 | * @var: parameter to retrieve | |
1c85cc64 | 1502 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1503 | * |
1c85cc64 | 1504 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1505 | * values < maximum. Reduce configuration space accordingly. |
1506 | * Return the maximum. | |
1507 | */ | |
e88e8ae6 TI |
1508 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1509 | struct snd_pcm_hw_params *params, | |
1510 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1511 | { |
1512 | int changed = _snd_pcm_hw_param_last(params, var); | |
1513 | if (changed < 0) | |
1514 | return changed; | |
1515 | if (params->rmask) { | |
1516 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1517 | if (snd_BUG_ON(err < 0)) |
1518 | return err; | |
1da177e4 LT |
1519 | } |
1520 | return snd_pcm_hw_param_value(params, var, dir); | |
1521 | } | |
1522 | ||
e88e8ae6 | 1523 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1524 | |
1525 | /** | |
1c85cc64 | 1526 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1527 | * @pcm: PCM instance |
1528 | * @params: the hw_params instance | |
1da177e4 | 1529 | * |
1c85cc64 | 1530 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1531 | * The configuration chosen is that obtained fixing in this order: |
1532 | * first access, first format, first subformat, min channels, | |
1533 | * min rate, min period time, max buffer size, min tick time | |
1534 | */ | |
2f4ca8e5 TI |
1535 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1536 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1537 | { |
2f4ca8e5 TI |
1538 | static int vars[] = { |
1539 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1540 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1541 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1542 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1543 | SNDRV_PCM_HW_PARAM_RATE, | |
1544 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1545 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1546 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1547 | -1 | |
1548 | }; | |
1549 | int err, *v; | |
1da177e4 | 1550 | |
2f4ca8e5 TI |
1551 | for (v = vars; *v != -1; v++) { |
1552 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1553 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1554 | else | |
1555 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1556 | if (snd_BUG_ON(err < 0)) |
1557 | return err; | |
2f4ca8e5 | 1558 | } |
1da177e4 LT |
1559 | return 0; |
1560 | } | |
1561 | ||
877211f5 | 1562 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1563 | void *arg) |
1564 | { | |
877211f5 | 1565 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1566 | unsigned long flags; |
1567 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1568 | if (snd_pcm_running(substream) && | |
1569 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1570 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1571 | else | |
1572 | runtime->status->hw_ptr = 0; | |
1573 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1574 | return 0; | |
1575 | } | |
1576 | ||
877211f5 | 1577 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1578 | void *arg) |
1579 | { | |
877211f5 TI |
1580 | struct snd_pcm_channel_info *info = arg; |
1581 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1582 | int width; |
1583 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1584 | info->offset = -1; | |
1585 | return 0; | |
1586 | } | |
1587 | width = snd_pcm_format_physical_width(runtime->format); | |
1588 | if (width < 0) | |
1589 | return width; | |
1590 | info->offset = 0; | |
1591 | switch (runtime->access) { | |
1592 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1593 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1594 | info->first = info->channel * width; | |
1595 | info->step = runtime->channels * width; | |
1596 | break; | |
1597 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1598 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1599 | { | |
1600 | size_t size = runtime->dma_bytes / runtime->channels; | |
1601 | info->first = info->channel * size * 8; | |
1602 | info->step = width; | |
1603 | break; | |
1604 | } | |
1605 | default: | |
1606 | snd_BUG(); | |
1607 | break; | |
1608 | } | |
1609 | return 0; | |
1610 | } | |
1611 | ||
8bea869c JK |
1612 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1613 | void *arg) | |
1614 | { | |
1615 | struct snd_pcm_hw_params *params = arg; | |
1616 | snd_pcm_format_t format; | |
1617 | int channels, width; | |
1618 | ||
1619 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1620 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1621 | format = params_format(params); | |
1622 | channels = params_channels(params); | |
1623 | width = snd_pcm_format_physical_width(format); | |
1624 | params->fifo_size /= width * channels; | |
1625 | } | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1da177e4 LT |
1629 | /** |
1630 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1631 | * @substream: the pcm substream instance | |
1632 | * @cmd: ioctl command | |
1633 | * @arg: ioctl argument | |
1634 | * | |
1635 | * Processes the generic ioctl commands for PCM. | |
1636 | * Can be passed as the ioctl callback for PCM ops. | |
1637 | * | |
1638 | * Returns zero if successful, or a negative error code on failure. | |
1639 | */ | |
877211f5 | 1640 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1641 | unsigned int cmd, void *arg) |
1642 | { | |
1643 | switch (cmd) { | |
1644 | case SNDRV_PCM_IOCTL1_INFO: | |
1645 | return 0; | |
1646 | case SNDRV_PCM_IOCTL1_RESET: | |
1647 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1648 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1649 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1650 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1651 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1652 | } |
1653 | return -ENXIO; | |
1654 | } | |
1655 | ||
e88e8ae6 TI |
1656 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1657 | ||
1da177e4 LT |
1658 | /** |
1659 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1660 | * @substream: the pcm substream instance | |
1661 | * | |
1662 | * This function is called from the interrupt handler when the | |
1663 | * PCM has processed the period size. It will update the current | |
31e8960b | 1664 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1665 | * |
1666 | * Even if more than one periods have elapsed since the last call, you | |
1667 | * have to call this only once. | |
1668 | */ | |
877211f5 | 1669 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1670 | { |
877211f5 | 1671 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1672 | unsigned long flags; |
1673 | ||
7eaa943c TI |
1674 | if (PCM_RUNTIME_CHECK(substream)) |
1675 | return; | |
1da177e4 | 1676 | runtime = substream->runtime; |
1da177e4 LT |
1677 | |
1678 | if (runtime->transfer_ack_begin) | |
1679 | runtime->transfer_ack_begin(substream); | |
1680 | ||
1681 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1682 | if (!snd_pcm_running(substream) || | |
f240406b | 1683 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1684 | goto _end; |
1685 | ||
1686 | if (substream->timer_running) | |
1687 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1688 | _end: |
1689 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1690 | if (runtime->transfer_ack_end) | |
1691 | runtime->transfer_ack_end(substream); | |
1692 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1693 | } | |
1694 | ||
e88e8ae6 TI |
1695 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1696 | ||
13075510 TI |
1697 | /* |
1698 | * Wait until avail_min data becomes available | |
1699 | * Returns a negative error code if any error occurs during operation. | |
1700 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1701 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1702 | */ | |
1703 | static int wait_for_avail_min(struct snd_pcm_substream *substream, | |
1704 | snd_pcm_uframes_t *availp) | |
1705 | { | |
1706 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1707 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1708 | wait_queue_t wait; | |
1709 | int err = 0; | |
1710 | snd_pcm_uframes_t avail = 0; | |
1711 | long tout; | |
1712 | ||
1713 | init_waitqueue_entry(&wait, current); | |
c91a988d | 1714 | add_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1715 | for (;;) { |
1716 | if (signal_pending(current)) { | |
1717 | err = -ERESTARTSYS; | |
1718 | break; | |
1719 | } | |
1720 | set_current_state(TASK_INTERRUPTIBLE); | |
1721 | snd_pcm_stream_unlock_irq(substream); | |
1722 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1723 | snd_pcm_stream_lock_irq(substream); | |
1724 | switch (runtime->status->state) { | |
1725 | case SNDRV_PCM_STATE_SUSPENDED: | |
1726 | err = -ESTRPIPE; | |
1727 | goto _endloop; | |
1728 | case SNDRV_PCM_STATE_XRUN: | |
1729 | err = -EPIPE; | |
1730 | goto _endloop; | |
1731 | case SNDRV_PCM_STATE_DRAINING: | |
1732 | if (is_playback) | |
1733 | err = -EPIPE; | |
1734 | else | |
1735 | avail = 0; /* indicate draining */ | |
1736 | goto _endloop; | |
1737 | case SNDRV_PCM_STATE_OPEN: | |
1738 | case SNDRV_PCM_STATE_SETUP: | |
1739 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1740 | err = -EBADFD; | |
1741 | goto _endloop; | |
1742 | } | |
1743 | if (!tout) { | |
1744 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1745 | is_playback ? "playback" : "capture"); | |
1746 | err = -EIO; | |
1747 | break; | |
1748 | } | |
1749 | if (is_playback) | |
1750 | avail = snd_pcm_playback_avail(runtime); | |
1751 | else | |
1752 | avail = snd_pcm_capture_avail(runtime); | |
1753 | if (avail >= runtime->control->avail_min) | |
1754 | break; | |
1755 | } | |
1756 | _endloop: | |
c91a988d | 1757 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1758 | *availp = avail; |
1759 | return err; | |
1760 | } | |
1761 | ||
877211f5 | 1762 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1763 | unsigned int hwoff, |
1764 | unsigned long data, unsigned int off, | |
1765 | snd_pcm_uframes_t frames) | |
1766 | { | |
877211f5 | 1767 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1768 | int err; |
1769 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1770 | if (substream->ops->copy) { | |
1771 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1772 | return err; | |
1773 | } else { | |
1774 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1775 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1776 | return -EFAULT; | |
1777 | } | |
1778 | return 0; | |
1779 | } | |
1780 | ||
877211f5 | 1781 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1782 | unsigned long data, unsigned int off, |
1783 | snd_pcm_uframes_t size); | |
1784 | ||
877211f5 | 1785 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1786 | unsigned long data, |
1787 | snd_pcm_uframes_t size, | |
1788 | int nonblock, | |
1789 | transfer_f transfer) | |
1790 | { | |
877211f5 | 1791 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1792 | snd_pcm_uframes_t xfer = 0; |
1793 | snd_pcm_uframes_t offset = 0; | |
1794 | int err = 0; | |
1795 | ||
1796 | if (size == 0) | |
1797 | return 0; | |
1da177e4 LT |
1798 | |
1799 | snd_pcm_stream_lock_irq(substream); | |
1800 | switch (runtime->status->state) { | |
1801 | case SNDRV_PCM_STATE_PREPARED: | |
1802 | case SNDRV_PCM_STATE_RUNNING: | |
1803 | case SNDRV_PCM_STATE_PAUSED: | |
1804 | break; | |
1805 | case SNDRV_PCM_STATE_XRUN: | |
1806 | err = -EPIPE; | |
1807 | goto _end_unlock; | |
1808 | case SNDRV_PCM_STATE_SUSPENDED: | |
1809 | err = -ESTRPIPE; | |
1810 | goto _end_unlock; | |
1811 | default: | |
1812 | err = -EBADFD; | |
1813 | goto _end_unlock; | |
1814 | } | |
1815 | ||
c91a988d | 1816 | runtime->twake = 1; |
1da177e4 LT |
1817 | while (size > 0) { |
1818 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1819 | snd_pcm_uframes_t avail; | |
1820 | snd_pcm_uframes_t cont; | |
31e8960b | 1821 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1822 | snd_pcm_update_hw_ptr(substream); |
1823 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1824 | if (!avail) { |
1da177e4 LT |
1825 | if (nonblock) { |
1826 | err = -EAGAIN; | |
1827 | goto _end_unlock; | |
1828 | } | |
13075510 TI |
1829 | err = wait_for_avail_min(substream, &avail); |
1830 | if (err < 0) | |
443feb88 | 1831 | goto _end_unlock; |
1da177e4 | 1832 | } |
1da177e4 LT |
1833 | frames = size > avail ? avail : size; |
1834 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1835 | if (frames > cont) | |
1836 | frames = cont; | |
7eaa943c | 1837 | if (snd_BUG_ON(!frames)) { |
c91a988d | 1838 | runtime->twake = 0; |
7eaa943c TI |
1839 | snd_pcm_stream_unlock_irq(substream); |
1840 | return -EINVAL; | |
1841 | } | |
1da177e4 LT |
1842 | appl_ptr = runtime->control->appl_ptr; |
1843 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1844 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 1845 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 1846 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
1847 | if (err < 0) |
1848 | goto _end_unlock; | |
1da177e4 LT |
1849 | switch (runtime->status->state) { |
1850 | case SNDRV_PCM_STATE_XRUN: | |
1851 | err = -EPIPE; | |
1852 | goto _end_unlock; | |
1853 | case SNDRV_PCM_STATE_SUSPENDED: | |
1854 | err = -ESTRPIPE; | |
1855 | goto _end_unlock; | |
1856 | default: | |
1857 | break; | |
1858 | } | |
1859 | appl_ptr += frames; | |
1860 | if (appl_ptr >= runtime->boundary) | |
1861 | appl_ptr -= runtime->boundary; | |
1862 | runtime->control->appl_ptr = appl_ptr; | |
1863 | if (substream->ops->ack) | |
1864 | substream->ops->ack(substream); | |
1865 | ||
1866 | offset += frames; | |
1867 | size -= frames; | |
1868 | xfer += frames; | |
1869 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1870 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1871 | err = snd_pcm_start(substream); | |
1872 | if (err < 0) | |
1873 | goto _end_unlock; | |
1874 | } | |
1da177e4 LT |
1875 | } |
1876 | _end_unlock: | |
c91a988d | 1877 | runtime->twake = 0; |
1250932e JK |
1878 | if (xfer > 0 && err >= 0) |
1879 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 1880 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
1881 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
1882 | } | |
1883 | ||
7eaa943c TI |
1884 | /* sanity-check for read/write methods */ |
1885 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1886 | { |
877211f5 | 1887 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1888 | if (PCM_RUNTIME_CHECK(substream)) |
1889 | return -ENXIO; | |
1da177e4 | 1890 | runtime = substream->runtime; |
7eaa943c TI |
1891 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1892 | return -EINVAL; | |
1da177e4 LT |
1893 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1894 | return -EBADFD; | |
7eaa943c TI |
1895 | return 0; |
1896 | } | |
1897 | ||
1898 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1899 | { | |
1900 | struct snd_pcm_runtime *runtime; | |
1901 | int nonblock; | |
1902 | int err; | |
1da177e4 | 1903 | |
7eaa943c TI |
1904 | err = pcm_sanity_check(substream); |
1905 | if (err < 0) | |
1906 | return err; | |
1907 | runtime = substream->runtime; | |
0df63e44 | 1908 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1909 | |
1910 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1911 | runtime->channels > 1) | |
1912 | return -EINVAL; | |
1913 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1914 | snd_pcm_lib_write_transfer); | |
1915 | } | |
1916 | ||
e88e8ae6 TI |
1917 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1918 | ||
877211f5 | 1919 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1920 | unsigned int hwoff, |
1921 | unsigned long data, unsigned int off, | |
1922 | snd_pcm_uframes_t frames) | |
1923 | { | |
877211f5 | 1924 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1925 | int err; |
1926 | void __user **bufs = (void __user **)data; | |
1927 | int channels = runtime->channels; | |
1928 | int c; | |
1929 | if (substream->ops->copy) { | |
7eaa943c TI |
1930 | if (snd_BUG_ON(!substream->ops->silence)) |
1931 | return -EINVAL; | |
1da177e4 LT |
1932 | for (c = 0; c < channels; ++c, ++bufs) { |
1933 | if (*bufs == NULL) { | |
1934 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1935 | return err; | |
1936 | } else { | |
1937 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1938 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1939 | return err; | |
1940 | } | |
1941 | } | |
1942 | } else { | |
1943 | /* default transfer behaviour */ | |
1944 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1945 | for (c = 0; c < channels; ++c, ++bufs) { |
1946 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1947 | if (*bufs == NULL) { | |
1948 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1949 | } else { | |
1950 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1951 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1952 | return -EFAULT; | |
1953 | } | |
1954 | } | |
1955 | } | |
1956 | return 0; | |
1957 | } | |
1958 | ||
877211f5 | 1959 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1960 | void __user **bufs, |
1961 | snd_pcm_uframes_t frames) | |
1962 | { | |
877211f5 | 1963 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1964 | int nonblock; |
7eaa943c | 1965 | int err; |
1da177e4 | 1966 | |
7eaa943c TI |
1967 | err = pcm_sanity_check(substream); |
1968 | if (err < 0) | |
1969 | return err; | |
1da177e4 | 1970 | runtime = substream->runtime; |
0df63e44 | 1971 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1972 | |
1973 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1974 | return -EINVAL; | |
1975 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
1976 | nonblock, snd_pcm_lib_writev_transfer); | |
1977 | } | |
1978 | ||
e88e8ae6 TI |
1979 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
1980 | ||
877211f5 | 1981 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1982 | unsigned int hwoff, |
1983 | unsigned long data, unsigned int off, | |
1984 | snd_pcm_uframes_t frames) | |
1985 | { | |
877211f5 | 1986 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1987 | int err; |
1988 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1989 | if (substream->ops->copy) { | |
1990 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1991 | return err; | |
1992 | } else { | |
1993 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1994 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
1995 | return -EFAULT; | |
1996 | } | |
1997 | return 0; | |
1998 | } | |
1999 | ||
877211f5 | 2000 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2001 | unsigned long data, |
2002 | snd_pcm_uframes_t size, | |
2003 | int nonblock, | |
2004 | transfer_f transfer) | |
2005 | { | |
877211f5 | 2006 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2007 | snd_pcm_uframes_t xfer = 0; |
2008 | snd_pcm_uframes_t offset = 0; | |
2009 | int err = 0; | |
2010 | ||
2011 | if (size == 0) | |
2012 | return 0; | |
1da177e4 LT |
2013 | |
2014 | snd_pcm_stream_lock_irq(substream); | |
2015 | switch (runtime->status->state) { | |
2016 | case SNDRV_PCM_STATE_PREPARED: | |
2017 | if (size >= runtime->start_threshold) { | |
2018 | err = snd_pcm_start(substream); | |
2019 | if (err < 0) | |
2020 | goto _end_unlock; | |
2021 | } | |
2022 | break; | |
2023 | case SNDRV_PCM_STATE_DRAINING: | |
2024 | case SNDRV_PCM_STATE_RUNNING: | |
2025 | case SNDRV_PCM_STATE_PAUSED: | |
2026 | break; | |
2027 | case SNDRV_PCM_STATE_XRUN: | |
2028 | err = -EPIPE; | |
2029 | goto _end_unlock; | |
2030 | case SNDRV_PCM_STATE_SUSPENDED: | |
2031 | err = -ESTRPIPE; | |
2032 | goto _end_unlock; | |
2033 | default: | |
2034 | err = -EBADFD; | |
2035 | goto _end_unlock; | |
2036 | } | |
2037 | ||
c91a988d | 2038 | runtime->twake = 1; |
1da177e4 LT |
2039 | while (size > 0) { |
2040 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2041 | snd_pcm_uframes_t avail; | |
2042 | snd_pcm_uframes_t cont; | |
31e8960b | 2043 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 2044 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 2045 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
2046 | if (!avail) { |
2047 | if (runtime->status->state == | |
2048 | SNDRV_PCM_STATE_DRAINING) { | |
2049 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2050 | goto _end_unlock; |
2051 | } | |
1da177e4 LT |
2052 | if (nonblock) { |
2053 | err = -EAGAIN; | |
2054 | goto _end_unlock; | |
2055 | } | |
13075510 TI |
2056 | err = wait_for_avail_min(substream, &avail); |
2057 | if (err < 0) | |
443feb88 | 2058 | goto _end_unlock; |
13075510 TI |
2059 | if (!avail) |
2060 | continue; /* draining */ | |
1da177e4 | 2061 | } |
1da177e4 LT |
2062 | frames = size > avail ? avail : size; |
2063 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2064 | if (frames > cont) | |
2065 | frames = cont; | |
7eaa943c | 2066 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2067 | runtime->twake = 0; |
7eaa943c TI |
2068 | snd_pcm_stream_unlock_irq(substream); |
2069 | return -EINVAL; | |
2070 | } | |
1da177e4 LT |
2071 | appl_ptr = runtime->control->appl_ptr; |
2072 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2073 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2074 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2075 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2076 | if (err < 0) |
2077 | goto _end_unlock; | |
1da177e4 LT |
2078 | switch (runtime->status->state) { |
2079 | case SNDRV_PCM_STATE_XRUN: | |
2080 | err = -EPIPE; | |
2081 | goto _end_unlock; | |
2082 | case SNDRV_PCM_STATE_SUSPENDED: | |
2083 | err = -ESTRPIPE; | |
2084 | goto _end_unlock; | |
2085 | default: | |
2086 | break; | |
2087 | } | |
2088 | appl_ptr += frames; | |
2089 | if (appl_ptr >= runtime->boundary) | |
2090 | appl_ptr -= runtime->boundary; | |
2091 | runtime->control->appl_ptr = appl_ptr; | |
2092 | if (substream->ops->ack) | |
2093 | substream->ops->ack(substream); | |
2094 | ||
2095 | offset += frames; | |
2096 | size -= frames; | |
2097 | xfer += frames; | |
1da177e4 LT |
2098 | } |
2099 | _end_unlock: | |
c91a988d | 2100 | runtime->twake = 0; |
1250932e JK |
2101 | if (xfer > 0 && err >= 0) |
2102 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2103 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2104 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2105 | } | |
2106 | ||
877211f5 | 2107 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2108 | { |
877211f5 | 2109 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2110 | int nonblock; |
7eaa943c | 2111 | int err; |
1da177e4 | 2112 | |
7eaa943c TI |
2113 | err = pcm_sanity_check(substream); |
2114 | if (err < 0) | |
2115 | return err; | |
1da177e4 | 2116 | runtime = substream->runtime; |
0df63e44 | 2117 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2118 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2119 | return -EINVAL; | |
2120 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2121 | } | |
2122 | ||
e88e8ae6 TI |
2123 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2124 | ||
877211f5 | 2125 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2126 | unsigned int hwoff, |
2127 | unsigned long data, unsigned int off, | |
2128 | snd_pcm_uframes_t frames) | |
2129 | { | |
877211f5 | 2130 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2131 | int err; |
2132 | void __user **bufs = (void __user **)data; | |
2133 | int channels = runtime->channels; | |
2134 | int c; | |
2135 | if (substream->ops->copy) { | |
2136 | for (c = 0; c < channels; ++c, ++bufs) { | |
2137 | char __user *buf; | |
2138 | if (*bufs == NULL) | |
2139 | continue; | |
2140 | buf = *bufs + samples_to_bytes(runtime, off); | |
2141 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2142 | return err; | |
2143 | } | |
2144 | } else { | |
2145 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2146 | for (c = 0; c < channels; ++c, ++bufs) { |
2147 | char *hwbuf; | |
2148 | char __user *buf; | |
2149 | if (*bufs == NULL) | |
2150 | continue; | |
2151 | ||
2152 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2153 | buf = *bufs + samples_to_bytes(runtime, off); | |
2154 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2155 | return -EFAULT; | |
2156 | } | |
2157 | } | |
2158 | return 0; | |
2159 | } | |
2160 | ||
877211f5 | 2161 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2162 | void __user **bufs, |
2163 | snd_pcm_uframes_t frames) | |
2164 | { | |
877211f5 | 2165 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2166 | int nonblock; |
7eaa943c | 2167 | int err; |
1da177e4 | 2168 | |
7eaa943c TI |
2169 | err = pcm_sanity_check(substream); |
2170 | if (err < 0) | |
2171 | return err; | |
1da177e4 | 2172 | runtime = substream->runtime; |
1da177e4 LT |
2173 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2174 | return -EBADFD; | |
2175 | ||
0df63e44 | 2176 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2177 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2178 | return -EINVAL; | |
2179 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2180 | } | |
2181 | ||
1da177e4 | 2182 | EXPORT_SYMBOL(snd_pcm_lib_readv); |