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); | |
9e216e8a JK |
70 | if (avail > runtime->buffer_size) |
71 | avail = runtime->buffer_size; | |
1da177e4 LT |
72 | runtime->silence_filled = avail > 0 ? avail : 0; |
73 | runtime->silence_start = (runtime->status->hw_ptr + | |
74 | runtime->silence_filled) % | |
75 | runtime->boundary; | |
76 | } else { | |
77 | ofs = runtime->status->hw_ptr; | |
78 | frames = new_hw_ptr - ofs; | |
79 | if ((snd_pcm_sframes_t)frames < 0) | |
80 | frames += runtime->boundary; | |
81 | runtime->silence_filled -= frames; | |
82 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
83 | runtime->silence_filled = 0; | |
9a826ddb | 84 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 85 | } else { |
9a826ddb | 86 | runtime->silence_start = ofs; |
1da177e4 | 87 | } |
1da177e4 LT |
88 | } |
89 | frames = runtime->buffer_size - runtime->silence_filled; | |
90 | } | |
7eaa943c TI |
91 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
92 | return; | |
1da177e4 LT |
93 | if (frames == 0) |
94 | return; | |
9a826ddb | 95 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
96 | while (frames > 0) { |
97 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
98 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
99 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
100 | if (substream->ops->silence) { | |
101 | int err; | |
102 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 103 | snd_BUG_ON(err < 0); |
1da177e4 LT |
104 | } else { |
105 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
106 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
107 | } | |
108 | } else { | |
109 | unsigned int c; | |
110 | unsigned int channels = runtime->channels; | |
111 | if (substream->ops->silence) { | |
112 | for (c = 0; c < channels; ++c) { | |
113 | int err; | |
114 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 115 | snd_BUG_ON(err < 0); |
1da177e4 LT |
116 | } |
117 | } else { | |
118 | size_t dma_csize = runtime->dma_bytes / channels; | |
119 | for (c = 0; c < channels; ++c) { | |
120 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
121 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
122 | } | |
123 | } | |
124 | } | |
125 | runtime->silence_filled += transfer; | |
126 | frames -= transfer; | |
127 | ofs = 0; | |
128 | } | |
129 | } | |
130 | ||
c0070110 TI |
131 | static void pcm_debug_name(struct snd_pcm_substream *substream, |
132 | char *name, size_t len) | |
133 | { | |
134 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
135 | substream->pcm->card->number, | |
136 | substream->pcm->device, | |
137 | substream->stream ? 'c' : 'p', | |
138 | substream->number); | |
139 | } | |
140 | ||
741b20cf JK |
141 | #define XRUN_DEBUG_BASIC (1<<0) |
142 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
143 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
144 | #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ | |
145 | #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ | |
4d96eb25 JK |
146 | #define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ |
147 | #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ | |
741b20cf | 148 | |
ed3da3d9 | 149 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 150 | |
741b20cf JK |
151 | #define xrun_debug(substream, mask) \ |
152 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
153 | #else |
154 | #define xrun_debug(substream, mask) 0 | |
155 | #endif | |
ed3da3d9 | 156 | |
741b20cf JK |
157 | #define dump_stack_on_xrun(substream) do { \ |
158 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
159 | dump_stack(); \ | |
ed3da3d9 TI |
160 | } while (0) |
161 | ||
877211f5 | 162 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 163 | { |
13f040f9 JK |
164 | struct snd_pcm_runtime *runtime = substream->runtime; |
165 | ||
166 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
167 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 168 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 169 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 TI |
170 | char name[16]; |
171 | pcm_debug_name(substream, name, sizeof(name)); | |
172 | snd_printd(KERN_DEBUG "XRUN: %s\n", name); | |
ed3da3d9 | 173 | dump_stack_on_xrun(substream); |
1da177e4 | 174 | } |
1da177e4 LT |
175 | } |
176 | ||
0f17014b | 177 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 JK |
178 | #define hw_ptr_error(substream, fmt, args...) \ |
179 | do { \ | |
180 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ | |
f240406b | 181 | xrun_log_show(substream); \ |
4d96eb25 JK |
182 | if (printk_ratelimit()) { \ |
183 | snd_printd("PCM: " fmt, ##args); \ | |
184 | } \ | |
185 | dump_stack_on_xrun(substream); \ | |
186 | } \ | |
187 | } while (0) | |
188 | ||
189 | #define XRUN_LOG_CNT 10 | |
190 | ||
191 | struct hwptr_log_entry { | |
192 | unsigned long jiffies; | |
1da177e4 | 193 | snd_pcm_uframes_t pos; |
4d96eb25 JK |
194 | snd_pcm_uframes_t period_size; |
195 | snd_pcm_uframes_t buffer_size; | |
196 | snd_pcm_uframes_t old_hw_ptr; | |
197 | snd_pcm_uframes_t hw_ptr_base; | |
4d96eb25 | 198 | }; |
1da177e4 | 199 | |
4d96eb25 JK |
200 | struct snd_pcm_hwptr_log { |
201 | unsigned int idx; | |
202 | unsigned int hit: 1; | |
203 | struct hwptr_log_entry entries[XRUN_LOG_CNT]; | |
204 | }; | |
205 | ||
206 | static void xrun_log(struct snd_pcm_substream *substream, | |
207 | snd_pcm_uframes_t pos) | |
208 | { | |
209 | struct snd_pcm_runtime *runtime = substream->runtime; | |
210 | struct snd_pcm_hwptr_log *log = runtime->hwptr_log; | |
211 | struct hwptr_log_entry *entry; | |
212 | ||
213 | if (log == NULL) { | |
214 | log = kzalloc(sizeof(*log), GFP_ATOMIC); | |
215 | if (log == NULL) | |
216 | return; | |
217 | runtime->hwptr_log = log; | |
218 | } else { | |
219 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
220 | return; | |
7c22f1aa | 221 | } |
4d96eb25 JK |
222 | entry = &log->entries[log->idx]; |
223 | entry->jiffies = jiffies; | |
224 | entry->pos = pos; | |
225 | entry->period_size = runtime->period_size; | |
226 | entry->buffer_size = runtime->buffer_size;; | |
227 | entry->old_hw_ptr = runtime->status->hw_ptr; | |
228 | entry->hw_ptr_base = runtime->hw_ptr_base; | |
4d96eb25 | 229 | log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
1da177e4 LT |
230 | } |
231 | ||
4d96eb25 JK |
232 | static void xrun_log_show(struct snd_pcm_substream *substream) |
233 | { | |
234 | struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; | |
235 | struct hwptr_log_entry *entry; | |
236 | char name[16]; | |
237 | unsigned int idx; | |
238 | int cnt; | |
239 | ||
240 | if (log == NULL) | |
241 | return; | |
242 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
243 | return; | |
244 | pcm_debug_name(substream, name, sizeof(name)); | |
245 | for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { | |
246 | entry = &log->entries[idx]; | |
247 | if (entry->period_size == 0) | |
248 | break; | |
f240406b JK |
249 | snd_printd("hwptr log: %s: j=%lu, pos=%ld/%ld/%ld, " |
250 | "hwptr=%ld/%ld\n", | |
4d96eb25 JK |
251 | name, entry->jiffies, (unsigned long)entry->pos, |
252 | (unsigned long)entry->period_size, | |
253 | (unsigned long)entry->buffer_size, | |
254 | (unsigned long)entry->old_hw_ptr, | |
f240406b | 255 | (unsigned long)entry->hw_ptr_base); |
4d96eb25 JK |
256 | idx++; |
257 | idx %= XRUN_LOG_CNT; | |
258 | } | |
259 | log->hit = 1; | |
260 | } | |
261 | ||
262 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ | |
263 | ||
4d96eb25 JK |
264 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
265 | #define xrun_log(substream, pos) do { } while (0) | |
266 | #define xrun_log_show(substream) do { } while (0) | |
267 | ||
268 | #endif | |
269 | ||
1250932e JK |
270 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
271 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
272 | { |
273 | snd_pcm_uframes_t avail; | |
274 | ||
275 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
276 | avail = snd_pcm_playback_avail(runtime); | |
277 | else | |
278 | avail = snd_pcm_capture_avail(runtime); | |
279 | if (avail > runtime->avail_max) | |
280 | runtime->avail_max = avail; | |
4cdc115f TI |
281 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
282 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 283 | snd_pcm_drain_done(substream); |
4cdc115f TI |
284 | return -EPIPE; |
285 | } | |
286 | } else { | |
287 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 288 | xrun(substream); |
4cdc115f TI |
289 | return -EPIPE; |
290 | } | |
1da177e4 | 291 | } |
5daeba34 DD |
292 | if (runtime->twake) { |
293 | if (avail >= runtime->twake) | |
294 | wake_up(&runtime->tsleep); | |
295 | } else if (avail >= runtime->control->avail_min) | |
296 | wake_up(&runtime->sleep); | |
1da177e4 LT |
297 | return 0; |
298 | } | |
299 | ||
f240406b JK |
300 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
301 | unsigned int in_interrupt) | |
1da177e4 | 302 | { |
877211f5 | 303 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 304 | snd_pcm_uframes_t pos; |
f240406b | 305 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
306 | snd_pcm_sframes_t hdelta, delta; |
307 | unsigned long jdelta; | |
1da177e4 | 308 | |
bbf6ad13 | 309 | old_hw_ptr = runtime->status->hw_ptr; |
f240406b | 310 | pos = substream->ops->pointer(substream); |
1da177e4 LT |
311 | if (pos == SNDRV_PCM_POS_XRUN) { |
312 | xrun(substream); | |
313 | return -EPIPE; | |
314 | } | |
f240406b JK |
315 | if (pos >= runtime->buffer_size) { |
316 | if (printk_ratelimit()) { | |
317 | char name[16]; | |
318 | pcm_debug_name(substream, name, sizeof(name)); | |
319 | xrun_log_show(substream); | |
320 | snd_printd(KERN_ERR "BUG: %s, pos = %ld, " | |
321 | "buffer size = %ld, period size = %ld\n", | |
322 | name, pos, runtime->buffer_size, | |
323 | runtime->period_size); | |
324 | } | |
325 | pos = 0; | |
cedb8118 | 326 | } |
f240406b JK |
327 | pos -= pos % runtime->min_align; |
328 | if (xrun_debug(substream, XRUN_DEBUG_LOG)) | |
329 | xrun_log(substream, pos); | |
ed3da3d9 TI |
330 | hw_base = runtime->hw_ptr_base; |
331 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
332 | if (in_interrupt) { |
333 | /* we know that one period was processed */ | |
334 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 335 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 336 | if (delta > new_hw_ptr) { |
ed3da3d9 | 337 | hw_base += runtime->buffer_size; |
8b22d943 | 338 | if (hw_base >= runtime->boundary) |
ed3da3d9 TI |
339 | hw_base = 0; |
340 | new_hw_ptr = hw_base + pos; | |
f240406b | 341 | goto __delta; |
1da177e4 | 342 | } |
1da177e4 | 343 | } |
f240406b JK |
344 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
345 | /* pointer crosses the end of the ring buffer */ | |
346 | if (new_hw_ptr < old_hw_ptr) { | |
347 | hw_base += runtime->buffer_size; | |
348 | if (hw_base >= runtime->boundary) | |
349 | hw_base = 0; | |
350 | new_hw_ptr = hw_base + pos; | |
351 | } | |
352 | __delta: | |
b406e610 CL |
353 | delta = new_hw_ptr - old_hw_ptr; |
354 | if (delta < 0) | |
355 | delta += runtime->boundary; | |
f240406b JK |
356 | if (xrun_debug(substream, in_interrupt ? |
357 | XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { | |
358 | char name[16]; | |
359 | pcm_debug_name(substream, name, sizeof(name)); | |
360 | snd_printd("%s_update: %s: pos=%u/%u/%u, " | |
361 | "hwptr=%ld/%ld/%ld/%ld\n", | |
362 | in_interrupt ? "period" : "hwptr", | |
363 | name, | |
364 | (unsigned int)pos, | |
365 | (unsigned int)runtime->period_size, | |
366 | (unsigned int)runtime->buffer_size, | |
367 | (unsigned long)delta, | |
368 | (unsigned long)old_hw_ptr, | |
369 | (unsigned long)new_hw_ptr, | |
370 | (unsigned long)runtime->hw_ptr_base); | |
371 | } | |
372 | /* something must be really wrong */ | |
7b3a177b | 373 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f240406b JK |
374 | hw_ptr_error(substream, |
375 | "Unexpected hw_pointer value %s" | |
376 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, " | |
377 | "old_hw_ptr=%ld)\n", | |
378 | in_interrupt ? "[Q] " : "[P]", | |
379 | substream->stream, (long)pos, | |
380 | (long)new_hw_ptr, (long)old_hw_ptr); | |
381 | return 0; | |
382 | } | |
c87d9732 TI |
383 | |
384 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 385 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
386 | goto no_jiffies_check; |
387 | ||
3e5b5016 TI |
388 | /* Skip the jiffies check for hardwares with BATCH flag. |
389 | * Such hardware usually just increases the position at each IRQ, | |
390 | * thus it can't give any strange position. | |
391 | */ | |
392 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
393 | goto no_jiffies_check; | |
f240406b | 394 | hdelta = delta; |
a4444da3 JK |
395 | if (hdelta < runtime->delay) |
396 | goto no_jiffies_check; | |
397 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
398 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
399 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
400 | delta = jdelta / | |
401 | (((runtime->period_size * HZ) / runtime->rate) | |
402 | + HZ/100); | |
f240406b JK |
403 | /* move new_hw_ptr according jiffies not pos variable */ |
404 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 405 | hw_base = delta; |
f240406b JK |
406 | /* use loop to avoid checks for delta overflows */ |
407 | /* the delta value is small or zero in most cases */ | |
408 | while (delta > 0) { | |
409 | new_hw_ptr += runtime->period_size; | |
410 | if (new_hw_ptr >= runtime->boundary) | |
411 | new_hw_ptr -= runtime->boundary; | |
412 | delta--; | |
413 | } | |
414 | /* align hw_base to buffer_size */ | |
bbf6ad13 | 415 | hw_ptr_error(substream, |
f240406b | 416 | "hw_ptr skipping! %s" |
bbf6ad13 | 417 | "(pos=%ld, delta=%ld, period=%ld, " |
f240406b JK |
418 | "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
419 | in_interrupt ? "[Q] " : "", | |
bbf6ad13 JK |
420 | (long)pos, (long)hdelta, |
421 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 422 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
423 | (unsigned long)old_hw_ptr, |
424 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
425 | /* reset values to proper state */ |
426 | delta = 0; | |
427 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 428 | } |
3e5b5016 | 429 | no_jiffies_check: |
bbf6ad13 | 430 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 | 431 | hw_ptr_error(substream, |
f240406b JK |
432 | "Lost interrupts? %s" |
433 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, " | |
434 | "old_hw_ptr=%ld)\n", | |
435 | in_interrupt ? "[Q] " : "", | |
ed3da3d9 | 436 | substream->stream, (long)delta, |
f240406b JK |
437 | (long)new_hw_ptr, |
438 | (long)old_hw_ptr); | |
ed3da3d9 | 439 | } |
f240406b JK |
440 | |
441 | if (runtime->status->hw_ptr == new_hw_ptr) | |
442 | return 0; | |
ab1863fc | 443 | |
1da177e4 LT |
444 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
445 | runtime->silence_size > 0) | |
446 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
447 | ||
e7636925 | 448 | if (in_interrupt) { |
ead4046b CL |
449 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
450 | if (delta < 0) | |
451 | delta += runtime->boundary; | |
452 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
453 | runtime->hw_ptr_interrupt += delta; | |
454 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
455 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 456 | } |
ed3da3d9 | 457 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 458 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 459 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
460 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
461 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 462 | |
1250932e | 463 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
464 | } |
465 | ||
466 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 467 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 468 | { |
f240406b | 469 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
470 | } |
471 | ||
472 | /** | |
473 | * snd_pcm_set_ops - set the PCM operators | |
474 | * @pcm: the pcm instance | |
475 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
476 | * @ops: the operator table | |
477 | * | |
478 | * Sets the given PCM operators to the pcm instance. | |
479 | */ | |
877211f5 | 480 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 481 | { |
877211f5 TI |
482 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
483 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
484 | |
485 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
486 | substream->ops = ops; | |
487 | } | |
488 | ||
e88e8ae6 | 489 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
490 | |
491 | /** | |
492 | * snd_pcm_sync - set the PCM sync id | |
493 | * @substream: the pcm substream | |
494 | * | |
495 | * Sets the PCM sync identifier for the card. | |
496 | */ | |
877211f5 | 497 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 498 | { |
877211f5 | 499 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
500 | |
501 | runtime->sync.id32[0] = substream->pcm->card->number; | |
502 | runtime->sync.id32[1] = -1; | |
503 | runtime->sync.id32[2] = -1; | |
504 | runtime->sync.id32[3] = -1; | |
505 | } | |
506 | ||
e88e8ae6 TI |
507 | EXPORT_SYMBOL(snd_pcm_set_sync); |
508 | ||
1da177e4 LT |
509 | /* |
510 | * Standard ioctl routine | |
511 | */ | |
512 | ||
1da177e4 LT |
513 | static inline unsigned int div32(unsigned int a, unsigned int b, |
514 | unsigned int *r) | |
515 | { | |
516 | if (b == 0) { | |
517 | *r = 0; | |
518 | return UINT_MAX; | |
519 | } | |
520 | *r = a % b; | |
521 | return a / b; | |
522 | } | |
523 | ||
524 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
525 | { | |
526 | if (b == 0) | |
527 | return UINT_MAX; | |
528 | return a / b; | |
529 | } | |
530 | ||
531 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
532 | { | |
533 | unsigned int r; | |
534 | unsigned int q; | |
535 | if (b == 0) | |
536 | return UINT_MAX; | |
537 | q = div32(a, b, &r); | |
538 | if (r) | |
539 | ++q; | |
540 | return q; | |
541 | } | |
542 | ||
543 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
544 | { | |
545 | if (a == 0) | |
546 | return 0; | |
547 | if (div_down(UINT_MAX, a) < b) | |
548 | return UINT_MAX; | |
549 | return a * b; | |
550 | } | |
551 | ||
552 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
553 | unsigned int c, unsigned int *r) | |
554 | { | |
555 | u_int64_t n = (u_int64_t) a * b; | |
556 | if (c == 0) { | |
7eaa943c | 557 | snd_BUG_ON(!n); |
1da177e4 LT |
558 | *r = 0; |
559 | return UINT_MAX; | |
560 | } | |
3f7440a6 | 561 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
562 | if (n >= UINT_MAX) { |
563 | *r = 0; | |
564 | return UINT_MAX; | |
565 | } | |
566 | return n; | |
567 | } | |
568 | ||
1da177e4 LT |
569 | /** |
570 | * snd_interval_refine - refine the interval value of configurator | |
571 | * @i: the interval value to refine | |
572 | * @v: the interval value to refer to | |
573 | * | |
574 | * Refines the interval value with the reference value. | |
575 | * The interval is changed to the range satisfying both intervals. | |
576 | * The interval status (min, max, integer, etc.) are evaluated. | |
577 | * | |
578 | * Returns non-zero if the value is changed, zero if not changed. | |
579 | */ | |
877211f5 | 580 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
581 | { |
582 | int changed = 0; | |
7eaa943c TI |
583 | if (snd_BUG_ON(snd_interval_empty(i))) |
584 | return -EINVAL; | |
1da177e4 LT |
585 | if (i->min < v->min) { |
586 | i->min = v->min; | |
587 | i->openmin = v->openmin; | |
588 | changed = 1; | |
589 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
590 | i->openmin = 1; | |
591 | changed = 1; | |
592 | } | |
593 | if (i->max > v->max) { | |
594 | i->max = v->max; | |
595 | i->openmax = v->openmax; | |
596 | changed = 1; | |
597 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
598 | i->openmax = 1; | |
599 | changed = 1; | |
600 | } | |
601 | if (!i->integer && v->integer) { | |
602 | i->integer = 1; | |
603 | changed = 1; | |
604 | } | |
605 | if (i->integer) { | |
606 | if (i->openmin) { | |
607 | i->min++; | |
608 | i->openmin = 0; | |
609 | } | |
610 | if (i->openmax) { | |
611 | i->max--; | |
612 | i->openmax = 0; | |
613 | } | |
614 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
615 | i->integer = 1; | |
616 | if (snd_interval_checkempty(i)) { | |
617 | snd_interval_none(i); | |
618 | return -EINVAL; | |
619 | } | |
620 | return changed; | |
621 | } | |
622 | ||
e88e8ae6 TI |
623 | EXPORT_SYMBOL(snd_interval_refine); |
624 | ||
877211f5 | 625 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 626 | { |
7eaa943c TI |
627 | if (snd_BUG_ON(snd_interval_empty(i))) |
628 | return -EINVAL; | |
1da177e4 LT |
629 | if (snd_interval_single(i)) |
630 | return 0; | |
631 | i->max = i->min; | |
632 | i->openmax = i->openmin; | |
633 | if (i->openmax) | |
634 | i->max++; | |
635 | return 1; | |
636 | } | |
637 | ||
877211f5 | 638 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 639 | { |
7eaa943c TI |
640 | if (snd_BUG_ON(snd_interval_empty(i))) |
641 | return -EINVAL; | |
1da177e4 LT |
642 | if (snd_interval_single(i)) |
643 | return 0; | |
644 | i->min = i->max; | |
645 | i->openmin = i->openmax; | |
646 | if (i->openmin) | |
647 | i->min--; | |
648 | return 1; | |
649 | } | |
650 | ||
877211f5 | 651 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
652 | { |
653 | if (a->empty || b->empty) { | |
654 | snd_interval_none(c); | |
655 | return; | |
656 | } | |
657 | c->empty = 0; | |
658 | c->min = mul(a->min, b->min); | |
659 | c->openmin = (a->openmin || b->openmin); | |
660 | c->max = mul(a->max, b->max); | |
661 | c->openmax = (a->openmax || b->openmax); | |
662 | c->integer = (a->integer && b->integer); | |
663 | } | |
664 | ||
665 | /** | |
666 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
667 | * @a: dividend |
668 | * @b: divisor | |
669 | * @c: quotient | |
1da177e4 LT |
670 | * |
671 | * c = a / b | |
672 | * | |
673 | * Returns non-zero if the value is changed, zero if not changed. | |
674 | */ | |
877211f5 | 675 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
676 | { |
677 | unsigned int r; | |
678 | if (a->empty || b->empty) { | |
679 | snd_interval_none(c); | |
680 | return; | |
681 | } | |
682 | c->empty = 0; | |
683 | c->min = div32(a->min, b->max, &r); | |
684 | c->openmin = (r || a->openmin || b->openmax); | |
685 | if (b->min > 0) { | |
686 | c->max = div32(a->max, b->min, &r); | |
687 | if (r) { | |
688 | c->max++; | |
689 | c->openmax = 1; | |
690 | } else | |
691 | c->openmax = (a->openmax || b->openmin); | |
692 | } else { | |
693 | c->max = UINT_MAX; | |
694 | c->openmax = 0; | |
695 | } | |
696 | c->integer = 0; | |
697 | } | |
698 | ||
699 | /** | |
700 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
701 | * @a: dividend 1 |
702 | * @b: dividend 2 | |
703 | * @k: divisor (as integer) | |
704 | * @c: result | |
705 | * | |
1da177e4 LT |
706 | * c = a * b / k |
707 | * | |
708 | * Returns non-zero if the value is changed, zero if not changed. | |
709 | */ | |
877211f5 TI |
710 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
711 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
712 | { |
713 | unsigned int r; | |
714 | if (a->empty || b->empty) { | |
715 | snd_interval_none(c); | |
716 | return; | |
717 | } | |
718 | c->empty = 0; | |
719 | c->min = muldiv32(a->min, b->min, k, &r); | |
720 | c->openmin = (r || a->openmin || b->openmin); | |
721 | c->max = muldiv32(a->max, b->max, k, &r); | |
722 | if (r) { | |
723 | c->max++; | |
724 | c->openmax = 1; | |
725 | } else | |
726 | c->openmax = (a->openmax || b->openmax); | |
727 | c->integer = 0; | |
728 | } | |
729 | ||
730 | /** | |
731 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
732 | * @a: dividend 1 |
733 | * @k: dividend 2 (as integer) | |
734 | * @b: divisor | |
735 | * @c: result | |
1da177e4 LT |
736 | * |
737 | * c = a * k / b | |
738 | * | |
739 | * Returns non-zero if the value is changed, zero if not changed. | |
740 | */ | |
877211f5 TI |
741 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
742 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
743 | { |
744 | unsigned int r; | |
745 | if (a->empty || b->empty) { | |
746 | snd_interval_none(c); | |
747 | return; | |
748 | } | |
749 | c->empty = 0; | |
750 | c->min = muldiv32(a->min, k, b->max, &r); | |
751 | c->openmin = (r || a->openmin || b->openmax); | |
752 | if (b->min > 0) { | |
753 | c->max = muldiv32(a->max, k, b->min, &r); | |
754 | if (r) { | |
755 | c->max++; | |
756 | c->openmax = 1; | |
757 | } else | |
758 | c->openmax = (a->openmax || b->openmin); | |
759 | } else { | |
760 | c->max = UINT_MAX; | |
761 | c->openmax = 0; | |
762 | } | |
763 | c->integer = 0; | |
764 | } | |
765 | ||
1da177e4 LT |
766 | /* ---- */ |
767 | ||
768 | ||
769 | /** | |
770 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
771 | * @i: interval to refine |
772 | * @rats_count: number of ratnum_t | |
773 | * @rats: ratnum_t array | |
774 | * @nump: pointer to store the resultant numerator | |
775 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
776 | * |
777 | * Returns non-zero if the value is changed, zero if not changed. | |
778 | */ | |
877211f5 TI |
779 | int snd_interval_ratnum(struct snd_interval *i, |
780 | unsigned int rats_count, struct snd_ratnum *rats, | |
781 | unsigned int *nump, unsigned int *denp) | |
1da177e4 | 782 | { |
8374e24c KH |
783 | unsigned int best_num, best_den; |
784 | int best_diff; | |
1da177e4 | 785 | unsigned int k; |
877211f5 | 786 | struct snd_interval t; |
1da177e4 | 787 | int err; |
8374e24c KH |
788 | unsigned int result_num, result_den; |
789 | int result_diff; | |
1da177e4 LT |
790 | |
791 | best_num = best_den = best_diff = 0; | |
792 | for (k = 0; k < rats_count; ++k) { | |
793 | unsigned int num = rats[k].num; | |
794 | unsigned int den; | |
795 | unsigned int q = i->min; | |
796 | int diff; | |
797 | if (q == 0) | |
798 | q = 1; | |
40962d7c | 799 | den = div_up(num, q); |
1da177e4 LT |
800 | if (den < rats[k].den_min) |
801 | continue; | |
802 | if (den > rats[k].den_max) | |
803 | den = rats[k].den_max; | |
804 | else { | |
805 | unsigned int r; | |
806 | r = (den - rats[k].den_min) % rats[k].den_step; | |
807 | if (r != 0) | |
808 | den -= r; | |
809 | } | |
810 | diff = num - q * den; | |
8374e24c KH |
811 | if (diff < 0) |
812 | diff = -diff; | |
1da177e4 LT |
813 | if (best_num == 0 || |
814 | diff * best_den < best_diff * den) { | |
815 | best_diff = diff; | |
816 | best_den = den; | |
817 | best_num = num; | |
818 | } | |
819 | } | |
820 | if (best_den == 0) { | |
821 | i->empty = 1; | |
822 | return -EINVAL; | |
823 | } | |
824 | t.min = div_down(best_num, best_den); | |
825 | t.openmin = !!(best_num % best_den); | |
826 | ||
8374e24c KH |
827 | result_num = best_num; |
828 | result_diff = best_diff; | |
829 | result_den = best_den; | |
1da177e4 LT |
830 | best_num = best_den = best_diff = 0; |
831 | for (k = 0; k < rats_count; ++k) { | |
832 | unsigned int num = rats[k].num; | |
833 | unsigned int den; | |
834 | unsigned int q = i->max; | |
835 | int diff; | |
836 | if (q == 0) { | |
837 | i->empty = 1; | |
838 | return -EINVAL; | |
839 | } | |
40962d7c | 840 | den = div_down(num, q); |
1da177e4 LT |
841 | if (den > rats[k].den_max) |
842 | continue; | |
843 | if (den < rats[k].den_min) | |
844 | den = rats[k].den_min; | |
845 | else { | |
846 | unsigned int r; | |
847 | r = (den - rats[k].den_min) % rats[k].den_step; | |
848 | if (r != 0) | |
849 | den += rats[k].den_step - r; | |
850 | } | |
851 | diff = q * den - num; | |
8374e24c KH |
852 | if (diff < 0) |
853 | diff = -diff; | |
1da177e4 LT |
854 | if (best_num == 0 || |
855 | diff * best_den < best_diff * den) { | |
856 | best_diff = diff; | |
857 | best_den = den; | |
858 | best_num = num; | |
859 | } | |
860 | } | |
861 | if (best_den == 0) { | |
862 | i->empty = 1; | |
863 | return -EINVAL; | |
864 | } | |
865 | t.max = div_up(best_num, best_den); | |
866 | t.openmax = !!(best_num % best_den); | |
867 | t.integer = 0; | |
868 | err = snd_interval_refine(i, &t); | |
869 | if (err < 0) | |
870 | return err; | |
871 | ||
872 | if (snd_interval_single(i)) { | |
8374e24c KH |
873 | if (best_diff * result_den < result_diff * best_den) { |
874 | result_num = best_num; | |
875 | result_den = best_den; | |
876 | } | |
1da177e4 | 877 | if (nump) |
8374e24c | 878 | *nump = result_num; |
1da177e4 | 879 | if (denp) |
8374e24c | 880 | *denp = result_den; |
1da177e4 LT |
881 | } |
882 | return err; | |
883 | } | |
884 | ||
e88e8ae6 TI |
885 | EXPORT_SYMBOL(snd_interval_ratnum); |
886 | ||
1da177e4 LT |
887 | /** |
888 | * snd_interval_ratden - refine the interval value | |
df8db936 | 889 | * @i: interval to refine |
877211f5 TI |
890 | * @rats_count: number of struct ratden |
891 | * @rats: struct ratden array | |
df8db936 TI |
892 | * @nump: pointer to store the resultant numerator |
893 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
894 | * |
895 | * Returns non-zero if the value is changed, zero if not changed. | |
896 | */ | |
877211f5 TI |
897 | static int snd_interval_ratden(struct snd_interval *i, |
898 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
899 | unsigned int *nump, unsigned int *denp) |
900 | { | |
901 | unsigned int best_num, best_diff, best_den; | |
902 | unsigned int k; | |
877211f5 | 903 | struct snd_interval t; |
1da177e4 LT |
904 | int err; |
905 | ||
906 | best_num = best_den = best_diff = 0; | |
907 | for (k = 0; k < rats_count; ++k) { | |
908 | unsigned int num; | |
909 | unsigned int den = rats[k].den; | |
910 | unsigned int q = i->min; | |
911 | int diff; | |
912 | num = mul(q, den); | |
913 | if (num > rats[k].num_max) | |
914 | continue; | |
915 | if (num < rats[k].num_min) | |
916 | num = rats[k].num_max; | |
917 | else { | |
918 | unsigned int r; | |
919 | r = (num - rats[k].num_min) % rats[k].num_step; | |
920 | if (r != 0) | |
921 | num += rats[k].num_step - r; | |
922 | } | |
923 | diff = num - q * den; | |
924 | if (best_num == 0 || | |
925 | diff * best_den < best_diff * den) { | |
926 | best_diff = diff; | |
927 | best_den = den; | |
928 | best_num = num; | |
929 | } | |
930 | } | |
931 | if (best_den == 0) { | |
932 | i->empty = 1; | |
933 | return -EINVAL; | |
934 | } | |
935 | t.min = div_down(best_num, best_den); | |
936 | t.openmin = !!(best_num % best_den); | |
937 | ||
938 | best_num = best_den = best_diff = 0; | |
939 | for (k = 0; k < rats_count; ++k) { | |
940 | unsigned int num; | |
941 | unsigned int den = rats[k].den; | |
942 | unsigned int q = i->max; | |
943 | int diff; | |
944 | num = mul(q, den); | |
945 | if (num < rats[k].num_min) | |
946 | continue; | |
947 | if (num > rats[k].num_max) | |
948 | num = rats[k].num_max; | |
949 | else { | |
950 | unsigned int r; | |
951 | r = (num - rats[k].num_min) % rats[k].num_step; | |
952 | if (r != 0) | |
953 | num -= r; | |
954 | } | |
955 | diff = q * den - num; | |
956 | if (best_num == 0 || | |
957 | diff * best_den < best_diff * den) { | |
958 | best_diff = diff; | |
959 | best_den = den; | |
960 | best_num = num; | |
961 | } | |
962 | } | |
963 | if (best_den == 0) { | |
964 | i->empty = 1; | |
965 | return -EINVAL; | |
966 | } | |
967 | t.max = div_up(best_num, best_den); | |
968 | t.openmax = !!(best_num % best_den); | |
969 | t.integer = 0; | |
970 | err = snd_interval_refine(i, &t); | |
971 | if (err < 0) | |
972 | return err; | |
973 | ||
974 | if (snd_interval_single(i)) { | |
975 | if (nump) | |
976 | *nump = best_num; | |
977 | if (denp) | |
978 | *denp = best_den; | |
979 | } | |
980 | return err; | |
981 | } | |
982 | ||
983 | /** | |
984 | * snd_interval_list - refine the interval value from the list | |
985 | * @i: the interval value to refine | |
986 | * @count: the number of elements in the list | |
987 | * @list: the value list | |
988 | * @mask: the bit-mask to evaluate | |
989 | * | |
990 | * Refines the interval value from the list. | |
991 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
992 | * evaluated. | |
993 | * | |
994 | * Returns non-zero if the value is changed, zero if not changed. | |
995 | */ | |
877211f5 | 996 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
997 | { |
998 | unsigned int k; | |
b1ddaf68 | 999 | struct snd_interval list_range; |
0981a260 TI |
1000 | |
1001 | if (!count) { | |
1002 | i->empty = 1; | |
1003 | return -EINVAL; | |
1004 | } | |
b1ddaf68 CL |
1005 | snd_interval_any(&list_range); |
1006 | list_range.min = UINT_MAX; | |
1007 | list_range.max = 0; | |
1da177e4 LT |
1008 | for (k = 0; k < count; k++) { |
1009 | if (mask && !(mask & (1 << k))) | |
1010 | continue; | |
b1ddaf68 | 1011 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1012 | continue; |
b1ddaf68 CL |
1013 | list_range.min = min(list_range.min, list[k]); |
1014 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1015 | } |
b1ddaf68 | 1016 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1017 | } |
1018 | ||
e88e8ae6 TI |
1019 | EXPORT_SYMBOL(snd_interval_list); |
1020 | ||
877211f5 | 1021 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
1022 | { |
1023 | unsigned int n; | |
1024 | int changed = 0; | |
1025 | n = (i->min - min) % step; | |
1026 | if (n != 0 || i->openmin) { | |
1027 | i->min += step - n; | |
1028 | changed = 1; | |
1029 | } | |
1030 | n = (i->max - min) % step; | |
1031 | if (n != 0 || i->openmax) { | |
1032 | i->max -= n; | |
1033 | changed = 1; | |
1034 | } | |
1035 | if (snd_interval_checkempty(i)) { | |
1036 | i->empty = 1; | |
1037 | return -EINVAL; | |
1038 | } | |
1039 | return changed; | |
1040 | } | |
1041 | ||
1042 | /* Info constraints helpers */ | |
1043 | ||
1044 | /** | |
1045 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1046 | * @runtime: the pcm runtime instance | |
1047 | * @cond: condition bits | |
1048 | * @var: the variable to evaluate | |
1049 | * @func: the evaluation function | |
1050 | * @private: the private data pointer passed to function | |
1051 | * @dep: the dependent variables | |
1052 | * | |
1053 | * Returns zero if successful, or a negative error code on failure. | |
1054 | */ | |
877211f5 | 1055 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1056 | int var, |
1057 | snd_pcm_hw_rule_func_t func, void *private, | |
1058 | int dep, ...) | |
1059 | { | |
877211f5 TI |
1060 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1061 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1062 | unsigned int k; |
1063 | va_list args; | |
1064 | va_start(args, dep); | |
1065 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1066 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1067 | unsigned int new_rules = constrs->rules_all + 16; |
1068 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
1069 | if (!new) | |
1070 | return -ENOMEM; | |
1071 | if (constrs->rules) { | |
1072 | memcpy(new, constrs->rules, | |
1073 | constrs->rules_num * sizeof(*c)); | |
1074 | kfree(constrs->rules); | |
1075 | } | |
1076 | constrs->rules = new; | |
1077 | constrs->rules_all = new_rules; | |
1078 | } | |
1079 | c = &constrs->rules[constrs->rules_num]; | |
1080 | c->cond = cond; | |
1081 | c->func = func; | |
1082 | c->var = var; | |
1083 | c->private = private; | |
1084 | k = 0; | |
1085 | while (1) { | |
7eaa943c TI |
1086 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1087 | return -EINVAL; | |
1da177e4 LT |
1088 | c->deps[k++] = dep; |
1089 | if (dep < 0) | |
1090 | break; | |
1091 | dep = va_arg(args, int); | |
1092 | } | |
1093 | constrs->rules_num++; | |
1094 | va_end(args); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
e88e8ae6 TI |
1098 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1099 | ||
1da177e4 | 1100 | /** |
1c85cc64 | 1101 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1102 | * @runtime: PCM runtime instance |
1103 | * @var: hw_params variable to apply the mask | |
1104 | * @mask: the bitmap mask | |
1105 | * | |
1c85cc64 | 1106 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1107 | */ |
877211f5 | 1108 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1109 | u_int32_t mask) |
1110 | { | |
877211f5 TI |
1111 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1112 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1113 | *maskp->bits &= mask; |
1114 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1115 | if (*maskp->bits == 0) | |
1116 | return -EINVAL; | |
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | /** | |
1c85cc64 | 1121 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1122 | * @runtime: PCM runtime instance |
1123 | * @var: hw_params variable to apply the mask | |
1124 | * @mask: the 64bit bitmap mask | |
1125 | * | |
1c85cc64 | 1126 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1127 | */ |
877211f5 | 1128 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1129 | u_int64_t mask) |
1130 | { | |
877211f5 TI |
1131 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1132 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1133 | maskp->bits[0] &= (u_int32_t)mask; |
1134 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1135 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1136 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1137 | return -EINVAL; | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | /** | |
1c85cc64 | 1142 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1143 | * @runtime: PCM runtime instance |
1144 | * @var: hw_params variable to apply the integer constraint | |
1145 | * | |
1146 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1147 | */ |
877211f5 | 1148 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1149 | { |
877211f5 | 1150 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1151 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1152 | } | |
1153 | ||
e88e8ae6 TI |
1154 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1155 | ||
1da177e4 | 1156 | /** |
1c85cc64 | 1157 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1158 | * @runtime: PCM runtime instance |
1159 | * @var: hw_params variable to apply the range | |
1160 | * @min: the minimal value | |
1161 | * @max: the maximal value | |
1162 | * | |
1163 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1164 | */ |
877211f5 | 1165 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1166 | unsigned int min, unsigned int max) |
1167 | { | |
877211f5 TI |
1168 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1169 | struct snd_interval t; | |
1da177e4 LT |
1170 | t.min = min; |
1171 | t.max = max; | |
1172 | t.openmin = t.openmax = 0; | |
1173 | t.integer = 0; | |
1174 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1175 | } | |
1176 | ||
e88e8ae6 TI |
1177 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1178 | ||
877211f5 TI |
1179 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1180 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1181 | { |
877211f5 | 1182 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1183 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1184 | } | |
1185 | ||
1186 | ||
1187 | /** | |
1c85cc64 | 1188 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1189 | * @runtime: PCM runtime instance |
1190 | * @cond: condition bits | |
1191 | * @var: hw_params variable to apply the list constraint | |
1192 | * @l: list | |
1193 | * | |
1194 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1195 | */ |
877211f5 | 1196 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1197 | unsigned int cond, |
1198 | snd_pcm_hw_param_t var, | |
877211f5 | 1199 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1200 | { |
1201 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1202 | snd_pcm_hw_rule_list, l, | |
1203 | var, -1); | |
1204 | } | |
1205 | ||
e88e8ae6 TI |
1206 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1207 | ||
877211f5 TI |
1208 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1209 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1210 | { |
877211f5 | 1211 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1212 | unsigned int num = 0, den = 0; |
1213 | int err; | |
1214 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1215 | r->nrats, r->rats, &num, &den); | |
1216 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1217 | params->rate_num = num; | |
1218 | params->rate_den = den; | |
1219 | } | |
1220 | return err; | |
1221 | } | |
1222 | ||
1223 | /** | |
1c85cc64 | 1224 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1225 | * @runtime: PCM runtime instance |
1226 | * @cond: condition bits | |
1227 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1228 | * @r: struct snd_ratnums constriants |
1da177e4 | 1229 | */ |
877211f5 | 1230 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1231 | unsigned int cond, |
1232 | snd_pcm_hw_param_t var, | |
877211f5 | 1233 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1234 | { |
1235 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1236 | snd_pcm_hw_rule_ratnums, r, | |
1237 | var, -1); | |
1238 | } | |
1239 | ||
e88e8ae6 TI |
1240 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1241 | ||
877211f5 TI |
1242 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1243 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1244 | { |
877211f5 | 1245 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1246 | unsigned int num = 0, den = 0; |
1247 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1248 | r->nrats, r->rats, &num, &den); | |
1249 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1250 | params->rate_num = num; | |
1251 | params->rate_den = den; | |
1252 | } | |
1253 | return err; | |
1254 | } | |
1255 | ||
1256 | /** | |
1c85cc64 | 1257 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1258 | * @runtime: PCM runtime instance |
1259 | * @cond: condition bits | |
1260 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1261 | * @r: struct snd_ratdens constriants |
1da177e4 | 1262 | */ |
877211f5 | 1263 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1264 | unsigned int cond, |
1265 | snd_pcm_hw_param_t var, | |
877211f5 | 1266 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1267 | { |
1268 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1269 | snd_pcm_hw_rule_ratdens, r, | |
1270 | var, -1); | |
1271 | } | |
1272 | ||
e88e8ae6 TI |
1273 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1274 | ||
877211f5 TI |
1275 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1276 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1277 | { |
1278 | unsigned int l = (unsigned long) rule->private; | |
1279 | int width = l & 0xffff; | |
1280 | unsigned int msbits = l >> 16; | |
877211f5 | 1281 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1282 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1283 | params->msbits = msbits; | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | /** | |
1c85cc64 | 1288 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1289 | * @runtime: PCM runtime instance |
1290 | * @cond: condition bits | |
1291 | * @width: sample bits width | |
1292 | * @msbits: msbits width | |
1da177e4 | 1293 | */ |
877211f5 | 1294 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1295 | unsigned int cond, |
1296 | unsigned int width, | |
1297 | unsigned int msbits) | |
1298 | { | |
1299 | unsigned long l = (msbits << 16) | width; | |
1300 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1301 | snd_pcm_hw_rule_msbits, | |
1302 | (void*) l, | |
1303 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1304 | } | |
1305 | ||
e88e8ae6 TI |
1306 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1307 | ||
877211f5 TI |
1308 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1309 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1310 | { |
1311 | unsigned long step = (unsigned long) rule->private; | |
1312 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1313 | } | |
1314 | ||
1315 | /** | |
1c85cc64 | 1316 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1317 | * @runtime: PCM runtime instance |
1318 | * @cond: condition bits | |
1319 | * @var: hw_params variable to apply the step constraint | |
1320 | * @step: step size | |
1da177e4 | 1321 | */ |
877211f5 | 1322 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1323 | unsigned int cond, |
1324 | snd_pcm_hw_param_t var, | |
1325 | unsigned long step) | |
1326 | { | |
1327 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1328 | snd_pcm_hw_rule_step, (void *) step, | |
1329 | var, -1); | |
1330 | } | |
1331 | ||
e88e8ae6 TI |
1332 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1333 | ||
877211f5 | 1334 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1335 | { |
67c39317 | 1336 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1337 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1338 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1339 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1340 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1341 | }; | |
1342 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1343 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1344 | } | |
1345 | ||
1346 | /** | |
1c85cc64 | 1347 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1348 | * @runtime: PCM runtime instance |
1349 | * @cond: condition bits | |
1350 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1351 | */ |
877211f5 | 1352 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1353 | unsigned int cond, |
1354 | snd_pcm_hw_param_t var) | |
1355 | { | |
1356 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1357 | snd_pcm_hw_rule_pow2, NULL, | |
1358 | var, -1); | |
1359 | } | |
1360 | ||
e88e8ae6 TI |
1361 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1362 | ||
877211f5 | 1363 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1364 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1365 | { |
1366 | if (hw_is_mask(var)) { | |
1367 | snd_mask_any(hw_param_mask(params, var)); | |
1368 | params->cmask |= 1 << var; | |
1369 | params->rmask |= 1 << var; | |
1370 | return; | |
1371 | } | |
1372 | if (hw_is_interval(var)) { | |
1373 | snd_interval_any(hw_param_interval(params, var)); | |
1374 | params->cmask |= 1 << var; | |
1375 | params->rmask |= 1 << var; | |
1376 | return; | |
1377 | } | |
1378 | snd_BUG(); | |
1379 | } | |
1380 | ||
877211f5 | 1381 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1382 | { |
1383 | unsigned int k; | |
1384 | memset(params, 0, sizeof(*params)); | |
1385 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1386 | _snd_pcm_hw_param_any(params, k); | |
1387 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1388 | _snd_pcm_hw_param_any(params, k); | |
1389 | params->info = ~0U; | |
1390 | } | |
1391 | ||
e88e8ae6 | 1392 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1393 | |
1394 | /** | |
1c85cc64 | 1395 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1396 | * @params: the hw_params instance |
1397 | * @var: parameter to retrieve | |
1c85cc64 | 1398 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1399 | * |
1c85cc64 RD |
1400 | * Return the value for field @var if it's fixed in configuration space |
1401 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1402 | */ |
e88e8ae6 TI |
1403 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1404 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1405 | { |
1406 | if (hw_is_mask(var)) { | |
877211f5 | 1407 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1408 | if (!snd_mask_single(mask)) |
1409 | return -EINVAL; | |
1410 | if (dir) | |
1411 | *dir = 0; | |
1412 | return snd_mask_value(mask); | |
1413 | } | |
1414 | if (hw_is_interval(var)) { | |
877211f5 | 1415 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1416 | if (!snd_interval_single(i)) |
1417 | return -EINVAL; | |
1418 | if (dir) | |
1419 | *dir = i->openmin; | |
1420 | return snd_interval_value(i); | |
1421 | } | |
1da177e4 LT |
1422 | return -EINVAL; |
1423 | } | |
1424 | ||
e88e8ae6 | 1425 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1426 | |
877211f5 | 1427 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1428 | snd_pcm_hw_param_t var) |
1429 | { | |
1430 | if (hw_is_mask(var)) { | |
1431 | snd_mask_none(hw_param_mask(params, var)); | |
1432 | params->cmask |= 1 << var; | |
1433 | params->rmask |= 1 << var; | |
1434 | } else if (hw_is_interval(var)) { | |
1435 | snd_interval_none(hw_param_interval(params, var)); | |
1436 | params->cmask |= 1 << var; | |
1437 | params->rmask |= 1 << var; | |
1438 | } else { | |
1439 | snd_BUG(); | |
1440 | } | |
1441 | } | |
1442 | ||
e88e8ae6 | 1443 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1444 | |
877211f5 | 1445 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1446 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1447 | { |
1448 | int changed; | |
1449 | if (hw_is_mask(var)) | |
1450 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1451 | else if (hw_is_interval(var)) | |
1452 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1453 | else |
1da177e4 | 1454 | return -EINVAL; |
1da177e4 LT |
1455 | if (changed) { |
1456 | params->cmask |= 1 << var; | |
1457 | params->rmask |= 1 << var; | |
1458 | } | |
1459 | return changed; | |
1460 | } | |
1461 | ||
1462 | ||
1463 | /** | |
1c85cc64 | 1464 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1465 | * @pcm: PCM instance |
1466 | * @params: the hw_params instance | |
1467 | * @var: parameter to retrieve | |
1c85cc64 | 1468 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1469 | * |
1c85cc64 | 1470 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1471 | * values > minimum. Reduce configuration space accordingly. |
1472 | * Return the minimum. | |
1473 | */ | |
e88e8ae6 TI |
1474 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1475 | struct snd_pcm_hw_params *params, | |
1476 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1477 | { |
1478 | int changed = _snd_pcm_hw_param_first(params, var); | |
1479 | if (changed < 0) | |
1480 | return changed; | |
1481 | if (params->rmask) { | |
1482 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1483 | if (snd_BUG_ON(err < 0)) |
1484 | return err; | |
1da177e4 LT |
1485 | } |
1486 | return snd_pcm_hw_param_value(params, var, dir); | |
1487 | } | |
1488 | ||
e88e8ae6 TI |
1489 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1490 | ||
877211f5 | 1491 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1492 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1493 | { |
1494 | int changed; | |
1495 | if (hw_is_mask(var)) | |
1496 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1497 | else if (hw_is_interval(var)) | |
1498 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1499 | else |
1da177e4 | 1500 | return -EINVAL; |
1da177e4 LT |
1501 | if (changed) { |
1502 | params->cmask |= 1 << var; | |
1503 | params->rmask |= 1 << var; | |
1504 | } | |
1505 | return changed; | |
1506 | } | |
1507 | ||
1508 | ||
1509 | /** | |
1c85cc64 | 1510 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1511 | * @pcm: PCM instance |
1512 | * @params: the hw_params instance | |
1513 | * @var: parameter to retrieve | |
1c85cc64 | 1514 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1515 | * |
1c85cc64 | 1516 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1517 | * values < maximum. Reduce configuration space accordingly. |
1518 | * Return the maximum. | |
1519 | */ | |
e88e8ae6 TI |
1520 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1521 | struct snd_pcm_hw_params *params, | |
1522 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1523 | { |
1524 | int changed = _snd_pcm_hw_param_last(params, var); | |
1525 | if (changed < 0) | |
1526 | return changed; | |
1527 | if (params->rmask) { | |
1528 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1529 | if (snd_BUG_ON(err < 0)) |
1530 | return err; | |
1da177e4 LT |
1531 | } |
1532 | return snd_pcm_hw_param_value(params, var, dir); | |
1533 | } | |
1534 | ||
e88e8ae6 | 1535 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1536 | |
1537 | /** | |
1c85cc64 | 1538 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1539 | * @pcm: PCM instance |
1540 | * @params: the hw_params instance | |
1da177e4 | 1541 | * |
1c85cc64 | 1542 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1543 | * The configuration chosen is that obtained fixing in this order: |
1544 | * first access, first format, first subformat, min channels, | |
1545 | * min rate, min period time, max buffer size, min tick time | |
1546 | */ | |
2f4ca8e5 TI |
1547 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1548 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1549 | { |
2f4ca8e5 TI |
1550 | static int vars[] = { |
1551 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1552 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1553 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1554 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1555 | SNDRV_PCM_HW_PARAM_RATE, | |
1556 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1557 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1558 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1559 | -1 | |
1560 | }; | |
1561 | int err, *v; | |
1da177e4 | 1562 | |
2f4ca8e5 TI |
1563 | for (v = vars; *v != -1; v++) { |
1564 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1565 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1566 | else | |
1567 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1568 | if (snd_BUG_ON(err < 0)) |
1569 | return err; | |
2f4ca8e5 | 1570 | } |
1da177e4 LT |
1571 | return 0; |
1572 | } | |
1573 | ||
877211f5 | 1574 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1575 | void *arg) |
1576 | { | |
877211f5 | 1577 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1578 | unsigned long flags; |
1579 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1580 | if (snd_pcm_running(substream) && | |
1581 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1582 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1583 | else | |
1584 | runtime->status->hw_ptr = 0; | |
1585 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1586 | return 0; | |
1587 | } | |
1588 | ||
877211f5 | 1589 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1590 | void *arg) |
1591 | { | |
877211f5 TI |
1592 | struct snd_pcm_channel_info *info = arg; |
1593 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1594 | int width; |
1595 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1596 | info->offset = -1; | |
1597 | return 0; | |
1598 | } | |
1599 | width = snd_pcm_format_physical_width(runtime->format); | |
1600 | if (width < 0) | |
1601 | return width; | |
1602 | info->offset = 0; | |
1603 | switch (runtime->access) { | |
1604 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1605 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1606 | info->first = info->channel * width; | |
1607 | info->step = runtime->channels * width; | |
1608 | break; | |
1609 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1610 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1611 | { | |
1612 | size_t size = runtime->dma_bytes / runtime->channels; | |
1613 | info->first = info->channel * size * 8; | |
1614 | info->step = width; | |
1615 | break; | |
1616 | } | |
1617 | default: | |
1618 | snd_BUG(); | |
1619 | break; | |
1620 | } | |
1621 | return 0; | |
1622 | } | |
1623 | ||
8bea869c JK |
1624 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1625 | void *arg) | |
1626 | { | |
1627 | struct snd_pcm_hw_params *params = arg; | |
1628 | snd_pcm_format_t format; | |
1629 | int channels, width; | |
1630 | ||
1631 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1632 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1633 | format = params_format(params); | |
1634 | channels = params_channels(params); | |
1635 | width = snd_pcm_format_physical_width(format); | |
1636 | params->fifo_size /= width * channels; | |
1637 | } | |
1638 | return 0; | |
1639 | } | |
1640 | ||
1da177e4 LT |
1641 | /** |
1642 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1643 | * @substream: the pcm substream instance | |
1644 | * @cmd: ioctl command | |
1645 | * @arg: ioctl argument | |
1646 | * | |
1647 | * Processes the generic ioctl commands for PCM. | |
1648 | * Can be passed as the ioctl callback for PCM ops. | |
1649 | * | |
1650 | * Returns zero if successful, or a negative error code on failure. | |
1651 | */ | |
877211f5 | 1652 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1653 | unsigned int cmd, void *arg) |
1654 | { | |
1655 | switch (cmd) { | |
1656 | case SNDRV_PCM_IOCTL1_INFO: | |
1657 | return 0; | |
1658 | case SNDRV_PCM_IOCTL1_RESET: | |
1659 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1660 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1661 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1662 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1663 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1664 | } |
1665 | return -ENXIO; | |
1666 | } | |
1667 | ||
e88e8ae6 TI |
1668 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1669 | ||
1da177e4 LT |
1670 | /** |
1671 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1672 | * @substream: the pcm substream instance | |
1673 | * | |
1674 | * This function is called from the interrupt handler when the | |
1675 | * PCM has processed the period size. It will update the current | |
31e8960b | 1676 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1677 | * |
1678 | * Even if more than one periods have elapsed since the last call, you | |
1679 | * have to call this only once. | |
1680 | */ | |
877211f5 | 1681 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1682 | { |
877211f5 | 1683 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1684 | unsigned long flags; |
1685 | ||
7eaa943c TI |
1686 | if (PCM_RUNTIME_CHECK(substream)) |
1687 | return; | |
1da177e4 | 1688 | runtime = substream->runtime; |
1da177e4 LT |
1689 | |
1690 | if (runtime->transfer_ack_begin) | |
1691 | runtime->transfer_ack_begin(substream); | |
1692 | ||
1693 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1694 | if (!snd_pcm_running(substream) || | |
f240406b | 1695 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1696 | goto _end; |
1697 | ||
1698 | if (substream->timer_running) | |
1699 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1700 | _end: |
1701 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1702 | if (runtime->transfer_ack_end) | |
1703 | runtime->transfer_ack_end(substream); | |
1704 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1705 | } | |
1706 | ||
e88e8ae6 TI |
1707 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1708 | ||
13075510 TI |
1709 | /* |
1710 | * Wait until avail_min data becomes available | |
1711 | * Returns a negative error code if any error occurs during operation. | |
1712 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1713 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1714 | */ | |
5daeba34 | 1715 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1716 | snd_pcm_uframes_t *availp) |
1717 | { | |
1718 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1719 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1720 | wait_queue_t wait; | |
1721 | int err = 0; | |
1722 | snd_pcm_uframes_t avail = 0; | |
1723 | long tout; | |
1724 | ||
1725 | init_waitqueue_entry(&wait, current); | |
c91a988d | 1726 | add_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1727 | for (;;) { |
1728 | if (signal_pending(current)) { | |
1729 | err = -ERESTARTSYS; | |
1730 | break; | |
1731 | } | |
1732 | set_current_state(TASK_INTERRUPTIBLE); | |
1733 | snd_pcm_stream_unlock_irq(substream); | |
1734 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1735 | snd_pcm_stream_lock_irq(substream); | |
1736 | switch (runtime->status->state) { | |
1737 | case SNDRV_PCM_STATE_SUSPENDED: | |
1738 | err = -ESTRPIPE; | |
1739 | goto _endloop; | |
1740 | case SNDRV_PCM_STATE_XRUN: | |
1741 | err = -EPIPE; | |
1742 | goto _endloop; | |
1743 | case SNDRV_PCM_STATE_DRAINING: | |
1744 | if (is_playback) | |
1745 | err = -EPIPE; | |
1746 | else | |
1747 | avail = 0; /* indicate draining */ | |
1748 | goto _endloop; | |
1749 | case SNDRV_PCM_STATE_OPEN: | |
1750 | case SNDRV_PCM_STATE_SETUP: | |
1751 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1752 | err = -EBADFD; | |
1753 | goto _endloop; | |
1754 | } | |
1755 | if (!tout) { | |
1756 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1757 | is_playback ? "playback" : "capture"); | |
1758 | err = -EIO; | |
1759 | break; | |
1760 | } | |
1761 | if (is_playback) | |
1762 | avail = snd_pcm_playback_avail(runtime); | |
1763 | else | |
1764 | avail = snd_pcm_capture_avail(runtime); | |
5daeba34 | 1765 | if (avail >= runtime->twake) |
13075510 TI |
1766 | break; |
1767 | } | |
1768 | _endloop: | |
c91a988d | 1769 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1770 | *availp = avail; |
1771 | return err; | |
1772 | } | |
1773 | ||
877211f5 | 1774 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1775 | unsigned int hwoff, |
1776 | unsigned long data, unsigned int off, | |
1777 | snd_pcm_uframes_t frames) | |
1778 | { | |
877211f5 | 1779 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1780 | int err; |
1781 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1782 | if (substream->ops->copy) { | |
1783 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1784 | return err; | |
1785 | } else { | |
1786 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1787 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1788 | return -EFAULT; | |
1789 | } | |
1790 | return 0; | |
1791 | } | |
1792 | ||
877211f5 | 1793 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1794 | unsigned long data, unsigned int off, |
1795 | snd_pcm_uframes_t size); | |
1796 | ||
877211f5 | 1797 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1798 | unsigned long data, |
1799 | snd_pcm_uframes_t size, | |
1800 | int nonblock, | |
1801 | transfer_f transfer) | |
1802 | { | |
877211f5 | 1803 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1804 | snd_pcm_uframes_t xfer = 0; |
1805 | snd_pcm_uframes_t offset = 0; | |
1806 | int err = 0; | |
1807 | ||
1808 | if (size == 0) | |
1809 | return 0; | |
1da177e4 LT |
1810 | |
1811 | snd_pcm_stream_lock_irq(substream); | |
1812 | switch (runtime->status->state) { | |
1813 | case SNDRV_PCM_STATE_PREPARED: | |
1814 | case SNDRV_PCM_STATE_RUNNING: | |
1815 | case SNDRV_PCM_STATE_PAUSED: | |
1816 | break; | |
1817 | case SNDRV_PCM_STATE_XRUN: | |
1818 | err = -EPIPE; | |
1819 | goto _end_unlock; | |
1820 | case SNDRV_PCM_STATE_SUSPENDED: | |
1821 | err = -ESTRPIPE; | |
1822 | goto _end_unlock; | |
1823 | default: | |
1824 | err = -EBADFD; | |
1825 | goto _end_unlock; | |
1826 | } | |
1827 | ||
5daeba34 | 1828 | runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4 LT |
1829 | while (size > 0) { |
1830 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1831 | snd_pcm_uframes_t avail; | |
1832 | snd_pcm_uframes_t cont; | |
31e8960b | 1833 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1834 | snd_pcm_update_hw_ptr(substream); |
1835 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1836 | if (!avail) { |
1da177e4 LT |
1837 | if (nonblock) { |
1838 | err = -EAGAIN; | |
1839 | goto _end_unlock; | |
1840 | } | |
5daeba34 DD |
1841 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
1842 | runtime->control->avail_min ? : 1); | |
1843 | err = wait_for_avail(substream, &avail); | |
13075510 | 1844 | if (err < 0) |
443feb88 | 1845 | goto _end_unlock; |
1da177e4 | 1846 | } |
1da177e4 LT |
1847 | frames = size > avail ? avail : size; |
1848 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1849 | if (frames > cont) | |
1850 | frames = cont; | |
7eaa943c | 1851 | if (snd_BUG_ON(!frames)) { |
c91a988d | 1852 | runtime->twake = 0; |
7eaa943c TI |
1853 | snd_pcm_stream_unlock_irq(substream); |
1854 | return -EINVAL; | |
1855 | } | |
1da177e4 LT |
1856 | appl_ptr = runtime->control->appl_ptr; |
1857 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1858 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 1859 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 1860 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
1861 | if (err < 0) |
1862 | goto _end_unlock; | |
1da177e4 LT |
1863 | switch (runtime->status->state) { |
1864 | case SNDRV_PCM_STATE_XRUN: | |
1865 | err = -EPIPE; | |
1866 | goto _end_unlock; | |
1867 | case SNDRV_PCM_STATE_SUSPENDED: | |
1868 | err = -ESTRPIPE; | |
1869 | goto _end_unlock; | |
1870 | default: | |
1871 | break; | |
1872 | } | |
1873 | appl_ptr += frames; | |
1874 | if (appl_ptr >= runtime->boundary) | |
1875 | appl_ptr -= runtime->boundary; | |
1876 | runtime->control->appl_ptr = appl_ptr; | |
1877 | if (substream->ops->ack) | |
1878 | substream->ops->ack(substream); | |
1879 | ||
1880 | offset += frames; | |
1881 | size -= frames; | |
1882 | xfer += frames; | |
1883 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1884 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1885 | err = snd_pcm_start(substream); | |
1886 | if (err < 0) | |
1887 | goto _end_unlock; | |
1888 | } | |
1da177e4 LT |
1889 | } |
1890 | _end_unlock: | |
c91a988d | 1891 | runtime->twake = 0; |
1250932e JK |
1892 | if (xfer > 0 && err >= 0) |
1893 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 1894 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
1895 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
1896 | } | |
1897 | ||
7eaa943c TI |
1898 | /* sanity-check for read/write methods */ |
1899 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1900 | { |
877211f5 | 1901 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1902 | if (PCM_RUNTIME_CHECK(substream)) |
1903 | return -ENXIO; | |
1da177e4 | 1904 | runtime = substream->runtime; |
7eaa943c TI |
1905 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1906 | return -EINVAL; | |
1da177e4 LT |
1907 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1908 | return -EBADFD; | |
7eaa943c TI |
1909 | return 0; |
1910 | } | |
1911 | ||
1912 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1913 | { | |
1914 | struct snd_pcm_runtime *runtime; | |
1915 | int nonblock; | |
1916 | int err; | |
1da177e4 | 1917 | |
7eaa943c TI |
1918 | err = pcm_sanity_check(substream); |
1919 | if (err < 0) | |
1920 | return err; | |
1921 | runtime = substream->runtime; | |
0df63e44 | 1922 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1923 | |
1924 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1925 | runtime->channels > 1) | |
1926 | return -EINVAL; | |
1927 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1928 | snd_pcm_lib_write_transfer); | |
1929 | } | |
1930 | ||
e88e8ae6 TI |
1931 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1932 | ||
877211f5 | 1933 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1934 | unsigned int hwoff, |
1935 | unsigned long data, unsigned int off, | |
1936 | snd_pcm_uframes_t frames) | |
1937 | { | |
877211f5 | 1938 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1939 | int err; |
1940 | void __user **bufs = (void __user **)data; | |
1941 | int channels = runtime->channels; | |
1942 | int c; | |
1943 | if (substream->ops->copy) { | |
7eaa943c TI |
1944 | if (snd_BUG_ON(!substream->ops->silence)) |
1945 | return -EINVAL; | |
1da177e4 LT |
1946 | for (c = 0; c < channels; ++c, ++bufs) { |
1947 | if (*bufs == NULL) { | |
1948 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1949 | return err; | |
1950 | } else { | |
1951 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1952 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1953 | return err; | |
1954 | } | |
1955 | } | |
1956 | } else { | |
1957 | /* default transfer behaviour */ | |
1958 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1959 | for (c = 0; c < channels; ++c, ++bufs) { |
1960 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1961 | if (*bufs == NULL) { | |
1962 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1963 | } else { | |
1964 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1965 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1966 | return -EFAULT; | |
1967 | } | |
1968 | } | |
1969 | } | |
1970 | return 0; | |
1971 | } | |
1972 | ||
877211f5 | 1973 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1974 | void __user **bufs, |
1975 | snd_pcm_uframes_t frames) | |
1976 | { | |
877211f5 | 1977 | struct snd_pcm_runtime *runtime; |
1da177e4 | 1978 | int nonblock; |
7eaa943c | 1979 | int err; |
1da177e4 | 1980 | |
7eaa943c TI |
1981 | err = pcm_sanity_check(substream); |
1982 | if (err < 0) | |
1983 | return err; | |
1da177e4 | 1984 | runtime = substream->runtime; |
0df63e44 | 1985 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1986 | |
1987 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
1988 | return -EINVAL; | |
1989 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
1990 | nonblock, snd_pcm_lib_writev_transfer); | |
1991 | } | |
1992 | ||
e88e8ae6 TI |
1993 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
1994 | ||
877211f5 | 1995 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1996 | unsigned int hwoff, |
1997 | unsigned long data, unsigned int off, | |
1998 | snd_pcm_uframes_t frames) | |
1999 | { | |
877211f5 | 2000 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2001 | int err; |
2002 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2003 | if (substream->ops->copy) { | |
2004 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2005 | return err; | |
2006 | } else { | |
2007 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2008 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2009 | return -EFAULT; | |
2010 | } | |
2011 | return 0; | |
2012 | } | |
2013 | ||
877211f5 | 2014 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2015 | unsigned long data, |
2016 | snd_pcm_uframes_t size, | |
2017 | int nonblock, | |
2018 | transfer_f transfer) | |
2019 | { | |
877211f5 | 2020 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2021 | snd_pcm_uframes_t xfer = 0; |
2022 | snd_pcm_uframes_t offset = 0; | |
2023 | int err = 0; | |
2024 | ||
2025 | if (size == 0) | |
2026 | return 0; | |
1da177e4 LT |
2027 | |
2028 | snd_pcm_stream_lock_irq(substream); | |
2029 | switch (runtime->status->state) { | |
2030 | case SNDRV_PCM_STATE_PREPARED: | |
2031 | if (size >= runtime->start_threshold) { | |
2032 | err = snd_pcm_start(substream); | |
2033 | if (err < 0) | |
2034 | goto _end_unlock; | |
2035 | } | |
2036 | break; | |
2037 | case SNDRV_PCM_STATE_DRAINING: | |
2038 | case SNDRV_PCM_STATE_RUNNING: | |
2039 | case SNDRV_PCM_STATE_PAUSED: | |
2040 | break; | |
2041 | case SNDRV_PCM_STATE_XRUN: | |
2042 | err = -EPIPE; | |
2043 | goto _end_unlock; | |
2044 | case SNDRV_PCM_STATE_SUSPENDED: | |
2045 | err = -ESTRPIPE; | |
2046 | goto _end_unlock; | |
2047 | default: | |
2048 | err = -EBADFD; | |
2049 | goto _end_unlock; | |
2050 | } | |
2051 | ||
5daeba34 | 2052 | runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4 LT |
2053 | while (size > 0) { |
2054 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2055 | snd_pcm_uframes_t avail; | |
2056 | snd_pcm_uframes_t cont; | |
31e8960b | 2057 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 2058 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 2059 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
2060 | if (!avail) { |
2061 | if (runtime->status->state == | |
2062 | SNDRV_PCM_STATE_DRAINING) { | |
2063 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2064 | goto _end_unlock; |
2065 | } | |
1da177e4 LT |
2066 | if (nonblock) { |
2067 | err = -EAGAIN; | |
2068 | goto _end_unlock; | |
2069 | } | |
5daeba34 DD |
2070 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2071 | runtime->control->avail_min ? : 1); | |
2072 | err = wait_for_avail(substream, &avail); | |
13075510 | 2073 | if (err < 0) |
443feb88 | 2074 | goto _end_unlock; |
13075510 TI |
2075 | if (!avail) |
2076 | continue; /* draining */ | |
1da177e4 | 2077 | } |
1da177e4 LT |
2078 | frames = size > avail ? avail : size; |
2079 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2080 | if (frames > cont) | |
2081 | frames = cont; | |
7eaa943c | 2082 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2083 | runtime->twake = 0; |
7eaa943c TI |
2084 | snd_pcm_stream_unlock_irq(substream); |
2085 | return -EINVAL; | |
2086 | } | |
1da177e4 LT |
2087 | appl_ptr = runtime->control->appl_ptr; |
2088 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2089 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2090 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2091 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2092 | if (err < 0) |
2093 | goto _end_unlock; | |
1da177e4 LT |
2094 | switch (runtime->status->state) { |
2095 | case SNDRV_PCM_STATE_XRUN: | |
2096 | err = -EPIPE; | |
2097 | goto _end_unlock; | |
2098 | case SNDRV_PCM_STATE_SUSPENDED: | |
2099 | err = -ESTRPIPE; | |
2100 | goto _end_unlock; | |
2101 | default: | |
2102 | break; | |
2103 | } | |
2104 | appl_ptr += frames; | |
2105 | if (appl_ptr >= runtime->boundary) | |
2106 | appl_ptr -= runtime->boundary; | |
2107 | runtime->control->appl_ptr = appl_ptr; | |
2108 | if (substream->ops->ack) | |
2109 | substream->ops->ack(substream); | |
2110 | ||
2111 | offset += frames; | |
2112 | size -= frames; | |
2113 | xfer += frames; | |
1da177e4 LT |
2114 | } |
2115 | _end_unlock: | |
c91a988d | 2116 | runtime->twake = 0; |
1250932e JK |
2117 | if (xfer > 0 && err >= 0) |
2118 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2119 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2120 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2121 | } | |
2122 | ||
877211f5 | 2123 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2124 | { |
877211f5 | 2125 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2126 | int nonblock; |
7eaa943c | 2127 | int err; |
1da177e4 | 2128 | |
7eaa943c TI |
2129 | err = pcm_sanity_check(substream); |
2130 | if (err < 0) | |
2131 | return err; | |
1da177e4 | 2132 | runtime = substream->runtime; |
0df63e44 | 2133 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2134 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2135 | return -EINVAL; | |
2136 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2137 | } | |
2138 | ||
e88e8ae6 TI |
2139 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2140 | ||
877211f5 | 2141 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2142 | unsigned int hwoff, |
2143 | unsigned long data, unsigned int off, | |
2144 | snd_pcm_uframes_t frames) | |
2145 | { | |
877211f5 | 2146 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2147 | int err; |
2148 | void __user **bufs = (void __user **)data; | |
2149 | int channels = runtime->channels; | |
2150 | int c; | |
2151 | if (substream->ops->copy) { | |
2152 | for (c = 0; c < channels; ++c, ++bufs) { | |
2153 | char __user *buf; | |
2154 | if (*bufs == NULL) | |
2155 | continue; | |
2156 | buf = *bufs + samples_to_bytes(runtime, off); | |
2157 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2158 | return err; | |
2159 | } | |
2160 | } else { | |
2161 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2162 | for (c = 0; c < channels; ++c, ++bufs) { |
2163 | char *hwbuf; | |
2164 | char __user *buf; | |
2165 | if (*bufs == NULL) | |
2166 | continue; | |
2167 | ||
2168 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2169 | buf = *bufs + samples_to_bytes(runtime, off); | |
2170 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2171 | return -EFAULT; | |
2172 | } | |
2173 | } | |
2174 | return 0; | |
2175 | } | |
2176 | ||
877211f5 | 2177 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2178 | void __user **bufs, |
2179 | snd_pcm_uframes_t frames) | |
2180 | { | |
877211f5 | 2181 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2182 | int nonblock; |
7eaa943c | 2183 | int err; |
1da177e4 | 2184 | |
7eaa943c TI |
2185 | err = pcm_sanity_check(substream); |
2186 | if (err < 0) | |
2187 | return err; | |
1da177e4 | 2188 | runtime = substream->runtime; |
1da177e4 LT |
2189 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2190 | return -EBADFD; | |
2191 | ||
0df63e44 | 2192 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2193 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2194 | return -EINVAL; | |
2195 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2196 | } | |
2197 | ||
1da177e4 | 2198 | EXPORT_SYMBOL(snd_pcm_lib_readv); |