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; | |
c80c1d54 | 226 | entry->buffer_size = runtime->buffer_size; |
4d96eb25 JK |
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) { |
bd76af0f JK |
337 | /* check for double acknowledged interrupts */ |
338 | hdelta = jiffies - runtime->hw_ptr_jiffies; | |
339 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { | |
340 | hw_base += runtime->buffer_size; | |
341 | if (hw_base >= runtime->boundary) | |
342 | hw_base = 0; | |
343 | new_hw_ptr = hw_base + pos; | |
344 | goto __delta; | |
345 | } | |
1da177e4 | 346 | } |
1da177e4 | 347 | } |
f240406b JK |
348 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
349 | /* pointer crosses the end of the ring buffer */ | |
350 | if (new_hw_ptr < old_hw_ptr) { | |
351 | hw_base += runtime->buffer_size; | |
352 | if (hw_base >= runtime->boundary) | |
353 | hw_base = 0; | |
354 | new_hw_ptr = hw_base + pos; | |
355 | } | |
356 | __delta: | |
b406e610 CL |
357 | delta = new_hw_ptr - old_hw_ptr; |
358 | if (delta < 0) | |
359 | delta += runtime->boundary; | |
f240406b JK |
360 | if (xrun_debug(substream, in_interrupt ? |
361 | XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { | |
362 | char name[16]; | |
363 | pcm_debug_name(substream, name, sizeof(name)); | |
364 | snd_printd("%s_update: %s: pos=%u/%u/%u, " | |
365 | "hwptr=%ld/%ld/%ld/%ld\n", | |
366 | in_interrupt ? "period" : "hwptr", | |
367 | name, | |
368 | (unsigned int)pos, | |
369 | (unsigned int)runtime->period_size, | |
370 | (unsigned int)runtime->buffer_size, | |
371 | (unsigned long)delta, | |
372 | (unsigned long)old_hw_ptr, | |
373 | (unsigned long)new_hw_ptr, | |
374 | (unsigned long)runtime->hw_ptr_base); | |
375 | } | |
ab69a490 | 376 | |
59ff878f CL |
377 | if (runtime->no_period_wakeup) { |
378 | /* | |
379 | * Without regular period interrupts, we have to check | |
380 | * the elapsed time to detect xruns. | |
381 | */ | |
382 | jdelta = jiffies - runtime->hw_ptr_jiffies; | |
383 | hdelta = jdelta - delta * HZ / runtime->rate; | |
384 | while (hdelta > runtime->hw_ptr_buffer_jiffies / 2 + 1) { | |
385 | delta += runtime->buffer_size; | |
386 | hw_base += runtime->buffer_size; | |
387 | if (hw_base >= runtime->boundary) | |
388 | hw_base = 0; | |
389 | new_hw_ptr = hw_base + pos; | |
390 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
391 | } | |
ab69a490 | 392 | goto no_delta_check; |
59ff878f | 393 | } |
ab69a490 | 394 | |
f240406b | 395 | /* something must be really wrong */ |
7b3a177b | 396 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f240406b JK |
397 | hw_ptr_error(substream, |
398 | "Unexpected hw_pointer value %s" | |
399 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, " | |
400 | "old_hw_ptr=%ld)\n", | |
401 | in_interrupt ? "[Q] " : "[P]", | |
402 | substream->stream, (long)pos, | |
403 | (long)new_hw_ptr, (long)old_hw_ptr); | |
404 | return 0; | |
405 | } | |
c87d9732 TI |
406 | |
407 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 408 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
409 | goto no_jiffies_check; |
410 | ||
3e5b5016 TI |
411 | /* Skip the jiffies check for hardwares with BATCH flag. |
412 | * Such hardware usually just increases the position at each IRQ, | |
413 | * thus it can't give any strange position. | |
414 | */ | |
415 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
416 | goto no_jiffies_check; | |
f240406b | 417 | hdelta = delta; |
a4444da3 JK |
418 | if (hdelta < runtime->delay) |
419 | goto no_jiffies_check; | |
420 | hdelta -= runtime->delay; | |
bbf6ad13 JK |
421 | jdelta = jiffies - runtime->hw_ptr_jiffies; |
422 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { | |
423 | delta = jdelta / | |
424 | (((runtime->period_size * HZ) / runtime->rate) | |
425 | + HZ/100); | |
f240406b JK |
426 | /* move new_hw_ptr according jiffies not pos variable */ |
427 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 428 | hw_base = delta; |
f240406b JK |
429 | /* use loop to avoid checks for delta overflows */ |
430 | /* the delta value is small or zero in most cases */ | |
431 | while (delta > 0) { | |
432 | new_hw_ptr += runtime->period_size; | |
433 | if (new_hw_ptr >= runtime->boundary) | |
434 | new_hw_ptr -= runtime->boundary; | |
435 | delta--; | |
436 | } | |
437 | /* align hw_base to buffer_size */ | |
bbf6ad13 | 438 | hw_ptr_error(substream, |
f240406b | 439 | "hw_ptr skipping! %s" |
bbf6ad13 | 440 | "(pos=%ld, delta=%ld, period=%ld, " |
f240406b JK |
441 | "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
442 | in_interrupt ? "[Q] " : "", | |
bbf6ad13 JK |
443 | (long)pos, (long)hdelta, |
444 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 445 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
446 | (unsigned long)old_hw_ptr, |
447 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
448 | /* reset values to proper state */ |
449 | delta = 0; | |
450 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 451 | } |
3e5b5016 | 452 | no_jiffies_check: |
bbf6ad13 | 453 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 | 454 | hw_ptr_error(substream, |
f240406b JK |
455 | "Lost interrupts? %s" |
456 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, " | |
457 | "old_hw_ptr=%ld)\n", | |
458 | in_interrupt ? "[Q] " : "", | |
ed3da3d9 | 459 | substream->stream, (long)delta, |
f240406b JK |
460 | (long)new_hw_ptr, |
461 | (long)old_hw_ptr); | |
ed3da3d9 | 462 | } |
f240406b | 463 | |
ab69a490 | 464 | no_delta_check: |
f240406b JK |
465 | if (runtime->status->hw_ptr == new_hw_ptr) |
466 | return 0; | |
ab1863fc | 467 | |
1da177e4 LT |
468 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
469 | runtime->silence_size > 0) | |
470 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
471 | ||
e7636925 | 472 | if (in_interrupt) { |
ead4046b CL |
473 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
474 | if (delta < 0) | |
475 | delta += runtime->boundary; | |
476 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
477 | runtime->hw_ptr_interrupt += delta; | |
478 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
479 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 480 | } |
ed3da3d9 | 481 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 482 | runtime->status->hw_ptr = new_hw_ptr; |
bbf6ad13 | 483 | runtime->hw_ptr_jiffies = jiffies; |
13f040f9 JK |
484 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) |
485 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 486 | |
1250932e | 487 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
488 | } |
489 | ||
490 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 491 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 492 | { |
f240406b | 493 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
494 | } |
495 | ||
496 | /** | |
497 | * snd_pcm_set_ops - set the PCM operators | |
498 | * @pcm: the pcm instance | |
499 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
500 | * @ops: the operator table | |
501 | * | |
502 | * Sets the given PCM operators to the pcm instance. | |
503 | */ | |
877211f5 | 504 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops) |
1da177e4 | 505 | { |
877211f5 TI |
506 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
507 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
508 | |
509 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
510 | substream->ops = ops; | |
511 | } | |
512 | ||
e88e8ae6 | 513 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
514 | |
515 | /** | |
516 | * snd_pcm_sync - set the PCM sync id | |
517 | * @substream: the pcm substream | |
518 | * | |
519 | * Sets the PCM sync identifier for the card. | |
520 | */ | |
877211f5 | 521 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 522 | { |
877211f5 | 523 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
524 | |
525 | runtime->sync.id32[0] = substream->pcm->card->number; | |
526 | runtime->sync.id32[1] = -1; | |
527 | runtime->sync.id32[2] = -1; | |
528 | runtime->sync.id32[3] = -1; | |
529 | } | |
530 | ||
e88e8ae6 TI |
531 | EXPORT_SYMBOL(snd_pcm_set_sync); |
532 | ||
1da177e4 LT |
533 | /* |
534 | * Standard ioctl routine | |
535 | */ | |
536 | ||
1da177e4 LT |
537 | static inline unsigned int div32(unsigned int a, unsigned int b, |
538 | unsigned int *r) | |
539 | { | |
540 | if (b == 0) { | |
541 | *r = 0; | |
542 | return UINT_MAX; | |
543 | } | |
544 | *r = a % b; | |
545 | return a / b; | |
546 | } | |
547 | ||
548 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
549 | { | |
550 | if (b == 0) | |
551 | return UINT_MAX; | |
552 | return a / b; | |
553 | } | |
554 | ||
555 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
556 | { | |
557 | unsigned int r; | |
558 | unsigned int q; | |
559 | if (b == 0) | |
560 | return UINT_MAX; | |
561 | q = div32(a, b, &r); | |
562 | if (r) | |
563 | ++q; | |
564 | return q; | |
565 | } | |
566 | ||
567 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
568 | { | |
569 | if (a == 0) | |
570 | return 0; | |
571 | if (div_down(UINT_MAX, a) < b) | |
572 | return UINT_MAX; | |
573 | return a * b; | |
574 | } | |
575 | ||
576 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
577 | unsigned int c, unsigned int *r) | |
578 | { | |
579 | u_int64_t n = (u_int64_t) a * b; | |
580 | if (c == 0) { | |
7eaa943c | 581 | snd_BUG_ON(!n); |
1da177e4 LT |
582 | *r = 0; |
583 | return UINT_MAX; | |
584 | } | |
3f7440a6 | 585 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
586 | if (n >= UINT_MAX) { |
587 | *r = 0; | |
588 | return UINT_MAX; | |
589 | } | |
590 | return n; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | /** |
594 | * snd_interval_refine - refine the interval value of configurator | |
595 | * @i: the interval value to refine | |
596 | * @v: the interval value to refer to | |
597 | * | |
598 | * Refines the interval value with the reference value. | |
599 | * The interval is changed to the range satisfying both intervals. | |
600 | * The interval status (min, max, integer, etc.) are evaluated. | |
601 | * | |
602 | * Returns non-zero if the value is changed, zero if not changed. | |
603 | */ | |
877211f5 | 604 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
605 | { |
606 | int changed = 0; | |
7eaa943c TI |
607 | if (snd_BUG_ON(snd_interval_empty(i))) |
608 | return -EINVAL; | |
1da177e4 LT |
609 | if (i->min < v->min) { |
610 | i->min = v->min; | |
611 | i->openmin = v->openmin; | |
612 | changed = 1; | |
613 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
614 | i->openmin = 1; | |
615 | changed = 1; | |
616 | } | |
617 | if (i->max > v->max) { | |
618 | i->max = v->max; | |
619 | i->openmax = v->openmax; | |
620 | changed = 1; | |
621 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
622 | i->openmax = 1; | |
623 | changed = 1; | |
624 | } | |
625 | if (!i->integer && v->integer) { | |
626 | i->integer = 1; | |
627 | changed = 1; | |
628 | } | |
629 | if (i->integer) { | |
630 | if (i->openmin) { | |
631 | i->min++; | |
632 | i->openmin = 0; | |
633 | } | |
634 | if (i->openmax) { | |
635 | i->max--; | |
636 | i->openmax = 0; | |
637 | } | |
638 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
639 | i->integer = 1; | |
640 | if (snd_interval_checkempty(i)) { | |
641 | snd_interval_none(i); | |
642 | return -EINVAL; | |
643 | } | |
644 | return changed; | |
645 | } | |
646 | ||
e88e8ae6 TI |
647 | EXPORT_SYMBOL(snd_interval_refine); |
648 | ||
877211f5 | 649 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 650 | { |
7eaa943c TI |
651 | if (snd_BUG_ON(snd_interval_empty(i))) |
652 | return -EINVAL; | |
1da177e4 LT |
653 | if (snd_interval_single(i)) |
654 | return 0; | |
655 | i->max = i->min; | |
656 | i->openmax = i->openmin; | |
657 | if (i->openmax) | |
658 | i->max++; | |
659 | return 1; | |
660 | } | |
661 | ||
877211f5 | 662 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 663 | { |
7eaa943c TI |
664 | if (snd_BUG_ON(snd_interval_empty(i))) |
665 | return -EINVAL; | |
1da177e4 LT |
666 | if (snd_interval_single(i)) |
667 | return 0; | |
668 | i->min = i->max; | |
669 | i->openmin = i->openmax; | |
670 | if (i->openmin) | |
671 | i->min--; | |
672 | return 1; | |
673 | } | |
674 | ||
877211f5 | 675 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
676 | { |
677 | if (a->empty || b->empty) { | |
678 | snd_interval_none(c); | |
679 | return; | |
680 | } | |
681 | c->empty = 0; | |
682 | c->min = mul(a->min, b->min); | |
683 | c->openmin = (a->openmin || b->openmin); | |
684 | c->max = mul(a->max, b->max); | |
685 | c->openmax = (a->openmax || b->openmax); | |
686 | c->integer = (a->integer && b->integer); | |
687 | } | |
688 | ||
689 | /** | |
690 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
691 | * @a: dividend |
692 | * @b: divisor | |
693 | * @c: quotient | |
1da177e4 LT |
694 | * |
695 | * c = a / b | |
696 | * | |
697 | * Returns non-zero if the value is changed, zero if not changed. | |
698 | */ | |
877211f5 | 699 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, 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 = div32(a->min, b->max, &r); | |
708 | c->openmin = (r || a->openmin || b->openmax); | |
709 | if (b->min > 0) { | |
710 | c->max = div32(a->max, b->min, &r); | |
711 | if (r) { | |
712 | c->max++; | |
713 | c->openmax = 1; | |
714 | } else | |
715 | c->openmax = (a->openmax || b->openmin); | |
716 | } else { | |
717 | c->max = UINT_MAX; | |
718 | c->openmax = 0; | |
719 | } | |
720 | c->integer = 0; | |
721 | } | |
722 | ||
723 | /** | |
724 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
725 | * @a: dividend 1 |
726 | * @b: dividend 2 | |
727 | * @k: divisor (as integer) | |
728 | * @c: result | |
729 | * | |
1da177e4 LT |
730 | * c = a * b / k |
731 | * | |
732 | * Returns non-zero if the value is changed, zero if not changed. | |
733 | */ | |
877211f5 TI |
734 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
735 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
736 | { |
737 | unsigned int r; | |
738 | if (a->empty || b->empty) { | |
739 | snd_interval_none(c); | |
740 | return; | |
741 | } | |
742 | c->empty = 0; | |
743 | c->min = muldiv32(a->min, b->min, k, &r); | |
744 | c->openmin = (r || a->openmin || b->openmin); | |
745 | c->max = muldiv32(a->max, b->max, k, &r); | |
746 | if (r) { | |
747 | c->max++; | |
748 | c->openmax = 1; | |
749 | } else | |
750 | c->openmax = (a->openmax || b->openmax); | |
751 | c->integer = 0; | |
752 | } | |
753 | ||
754 | /** | |
755 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
756 | * @a: dividend 1 |
757 | * @k: dividend 2 (as integer) | |
758 | * @b: divisor | |
759 | * @c: result | |
1da177e4 LT |
760 | * |
761 | * c = a * k / b | |
762 | * | |
763 | * Returns non-zero if the value is changed, zero if not changed. | |
764 | */ | |
877211f5 TI |
765 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
766 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
767 | { |
768 | unsigned int r; | |
769 | if (a->empty || b->empty) { | |
770 | snd_interval_none(c); | |
771 | return; | |
772 | } | |
773 | c->empty = 0; | |
774 | c->min = muldiv32(a->min, k, b->max, &r); | |
775 | c->openmin = (r || a->openmin || b->openmax); | |
776 | if (b->min > 0) { | |
777 | c->max = muldiv32(a->max, k, b->min, &r); | |
778 | if (r) { | |
779 | c->max++; | |
780 | c->openmax = 1; | |
781 | } else | |
782 | c->openmax = (a->openmax || b->openmin); | |
783 | } else { | |
784 | c->max = UINT_MAX; | |
785 | c->openmax = 0; | |
786 | } | |
787 | c->integer = 0; | |
788 | } | |
789 | ||
1da177e4 LT |
790 | /* ---- */ |
791 | ||
792 | ||
793 | /** | |
794 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
795 | * @i: interval to refine |
796 | * @rats_count: number of ratnum_t | |
797 | * @rats: ratnum_t array | |
798 | * @nump: pointer to store the resultant numerator | |
799 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
800 | * |
801 | * Returns non-zero if the value is changed, zero if not changed. | |
802 | */ | |
877211f5 TI |
803 | int snd_interval_ratnum(struct snd_interval *i, |
804 | unsigned int rats_count, struct snd_ratnum *rats, | |
805 | unsigned int *nump, unsigned int *denp) | |
1da177e4 | 806 | { |
8374e24c KH |
807 | unsigned int best_num, best_den; |
808 | int best_diff; | |
1da177e4 | 809 | unsigned int k; |
877211f5 | 810 | struct snd_interval t; |
1da177e4 | 811 | int err; |
8374e24c KH |
812 | unsigned int result_num, result_den; |
813 | int result_diff; | |
1da177e4 LT |
814 | |
815 | best_num = best_den = best_diff = 0; | |
816 | for (k = 0; k < rats_count; ++k) { | |
817 | unsigned int num = rats[k].num; | |
818 | unsigned int den; | |
819 | unsigned int q = i->min; | |
820 | int diff; | |
821 | if (q == 0) | |
822 | q = 1; | |
40962d7c | 823 | den = div_up(num, q); |
1da177e4 LT |
824 | if (den < rats[k].den_min) |
825 | continue; | |
826 | if (den > rats[k].den_max) | |
827 | den = rats[k].den_max; | |
828 | else { | |
829 | unsigned int r; | |
830 | r = (den - rats[k].den_min) % rats[k].den_step; | |
831 | if (r != 0) | |
832 | den -= r; | |
833 | } | |
834 | diff = num - q * den; | |
8374e24c KH |
835 | if (diff < 0) |
836 | diff = -diff; | |
1da177e4 LT |
837 | if (best_num == 0 || |
838 | diff * best_den < best_diff * den) { | |
839 | best_diff = diff; | |
840 | best_den = den; | |
841 | best_num = num; | |
842 | } | |
843 | } | |
844 | if (best_den == 0) { | |
845 | i->empty = 1; | |
846 | return -EINVAL; | |
847 | } | |
848 | t.min = div_down(best_num, best_den); | |
849 | t.openmin = !!(best_num % best_den); | |
850 | ||
8374e24c KH |
851 | result_num = best_num; |
852 | result_diff = best_diff; | |
853 | result_den = best_den; | |
1da177e4 LT |
854 | best_num = best_den = best_diff = 0; |
855 | for (k = 0; k < rats_count; ++k) { | |
856 | unsigned int num = rats[k].num; | |
857 | unsigned int den; | |
858 | unsigned int q = i->max; | |
859 | int diff; | |
860 | if (q == 0) { | |
861 | i->empty = 1; | |
862 | return -EINVAL; | |
863 | } | |
40962d7c | 864 | den = div_down(num, q); |
1da177e4 LT |
865 | if (den > rats[k].den_max) |
866 | continue; | |
867 | if (den < rats[k].den_min) | |
868 | den = rats[k].den_min; | |
869 | else { | |
870 | unsigned int r; | |
871 | r = (den - rats[k].den_min) % rats[k].den_step; | |
872 | if (r != 0) | |
873 | den += rats[k].den_step - r; | |
874 | } | |
875 | diff = q * den - num; | |
8374e24c KH |
876 | if (diff < 0) |
877 | diff = -diff; | |
1da177e4 LT |
878 | if (best_num == 0 || |
879 | diff * best_den < best_diff * den) { | |
880 | best_diff = diff; | |
881 | best_den = den; | |
882 | best_num = num; | |
883 | } | |
884 | } | |
885 | if (best_den == 0) { | |
886 | i->empty = 1; | |
887 | return -EINVAL; | |
888 | } | |
889 | t.max = div_up(best_num, best_den); | |
890 | t.openmax = !!(best_num % best_den); | |
891 | t.integer = 0; | |
892 | err = snd_interval_refine(i, &t); | |
893 | if (err < 0) | |
894 | return err; | |
895 | ||
896 | if (snd_interval_single(i)) { | |
8374e24c KH |
897 | if (best_diff * result_den < result_diff * best_den) { |
898 | result_num = best_num; | |
899 | result_den = best_den; | |
900 | } | |
1da177e4 | 901 | if (nump) |
8374e24c | 902 | *nump = result_num; |
1da177e4 | 903 | if (denp) |
8374e24c | 904 | *denp = result_den; |
1da177e4 LT |
905 | } |
906 | return err; | |
907 | } | |
908 | ||
e88e8ae6 TI |
909 | EXPORT_SYMBOL(snd_interval_ratnum); |
910 | ||
1da177e4 LT |
911 | /** |
912 | * snd_interval_ratden - refine the interval value | |
df8db936 | 913 | * @i: interval to refine |
877211f5 TI |
914 | * @rats_count: number of struct ratden |
915 | * @rats: struct ratden array | |
df8db936 TI |
916 | * @nump: pointer to store the resultant numerator |
917 | * @denp: pointer to store the resultant denominator | |
1da177e4 LT |
918 | * |
919 | * Returns non-zero if the value is changed, zero if not changed. | |
920 | */ | |
877211f5 TI |
921 | static int snd_interval_ratden(struct snd_interval *i, |
922 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
923 | unsigned int *nump, unsigned int *denp) |
924 | { | |
925 | unsigned int best_num, best_diff, best_den; | |
926 | unsigned int k; | |
877211f5 | 927 | struct snd_interval t; |
1da177e4 LT |
928 | int err; |
929 | ||
930 | best_num = best_den = best_diff = 0; | |
931 | for (k = 0; k < rats_count; ++k) { | |
932 | unsigned int num; | |
933 | unsigned int den = rats[k].den; | |
934 | unsigned int q = i->min; | |
935 | int diff; | |
936 | num = mul(q, den); | |
937 | if (num > rats[k].num_max) | |
938 | continue; | |
939 | if (num < rats[k].num_min) | |
940 | num = rats[k].num_max; | |
941 | else { | |
942 | unsigned int r; | |
943 | r = (num - rats[k].num_min) % rats[k].num_step; | |
944 | if (r != 0) | |
945 | num += rats[k].num_step - r; | |
946 | } | |
947 | diff = num - q * den; | |
948 | if (best_num == 0 || | |
949 | diff * best_den < best_diff * den) { | |
950 | best_diff = diff; | |
951 | best_den = den; | |
952 | best_num = num; | |
953 | } | |
954 | } | |
955 | if (best_den == 0) { | |
956 | i->empty = 1; | |
957 | return -EINVAL; | |
958 | } | |
959 | t.min = div_down(best_num, best_den); | |
960 | t.openmin = !!(best_num % best_den); | |
961 | ||
962 | best_num = best_den = best_diff = 0; | |
963 | for (k = 0; k < rats_count; ++k) { | |
964 | unsigned int num; | |
965 | unsigned int den = rats[k].den; | |
966 | unsigned int q = i->max; | |
967 | int diff; | |
968 | num = mul(q, den); | |
969 | if (num < rats[k].num_min) | |
970 | continue; | |
971 | if (num > rats[k].num_max) | |
972 | num = rats[k].num_max; | |
973 | else { | |
974 | unsigned int r; | |
975 | r = (num - rats[k].num_min) % rats[k].num_step; | |
976 | if (r != 0) | |
977 | num -= r; | |
978 | } | |
979 | diff = q * den - num; | |
980 | if (best_num == 0 || | |
981 | diff * best_den < best_diff * den) { | |
982 | best_diff = diff; | |
983 | best_den = den; | |
984 | best_num = num; | |
985 | } | |
986 | } | |
987 | if (best_den == 0) { | |
988 | i->empty = 1; | |
989 | return -EINVAL; | |
990 | } | |
991 | t.max = div_up(best_num, best_den); | |
992 | t.openmax = !!(best_num % best_den); | |
993 | t.integer = 0; | |
994 | err = snd_interval_refine(i, &t); | |
995 | if (err < 0) | |
996 | return err; | |
997 | ||
998 | if (snd_interval_single(i)) { | |
999 | if (nump) | |
1000 | *nump = best_num; | |
1001 | if (denp) | |
1002 | *denp = best_den; | |
1003 | } | |
1004 | return err; | |
1005 | } | |
1006 | ||
1007 | /** | |
1008 | * snd_interval_list - refine the interval value from the list | |
1009 | * @i: the interval value to refine | |
1010 | * @count: the number of elements in the list | |
1011 | * @list: the value list | |
1012 | * @mask: the bit-mask to evaluate | |
1013 | * | |
1014 | * Refines the interval value from the list. | |
1015 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1016 | * evaluated. | |
1017 | * | |
1018 | * Returns non-zero if the value is changed, zero if not changed. | |
1019 | */ | |
877211f5 | 1020 | int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *list, unsigned int mask) |
1da177e4 LT |
1021 | { |
1022 | unsigned int k; | |
b1ddaf68 | 1023 | struct snd_interval list_range; |
0981a260 TI |
1024 | |
1025 | if (!count) { | |
1026 | i->empty = 1; | |
1027 | return -EINVAL; | |
1028 | } | |
b1ddaf68 CL |
1029 | snd_interval_any(&list_range); |
1030 | list_range.min = UINT_MAX; | |
1031 | list_range.max = 0; | |
1da177e4 LT |
1032 | for (k = 0; k < count; k++) { |
1033 | if (mask && !(mask & (1 << k))) | |
1034 | continue; | |
b1ddaf68 | 1035 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1036 | continue; |
b1ddaf68 CL |
1037 | list_range.min = min(list_range.min, list[k]); |
1038 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1039 | } |
b1ddaf68 | 1040 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1041 | } |
1042 | ||
e88e8ae6 TI |
1043 | EXPORT_SYMBOL(snd_interval_list); |
1044 | ||
877211f5 | 1045 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
1046 | { |
1047 | unsigned int n; | |
1048 | int changed = 0; | |
1049 | n = (i->min - min) % step; | |
1050 | if (n != 0 || i->openmin) { | |
1051 | i->min += step - n; | |
1052 | changed = 1; | |
1053 | } | |
1054 | n = (i->max - min) % step; | |
1055 | if (n != 0 || i->openmax) { | |
1056 | i->max -= n; | |
1057 | changed = 1; | |
1058 | } | |
1059 | if (snd_interval_checkempty(i)) { | |
1060 | i->empty = 1; | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | return changed; | |
1064 | } | |
1065 | ||
1066 | /* Info constraints helpers */ | |
1067 | ||
1068 | /** | |
1069 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1070 | * @runtime: the pcm runtime instance | |
1071 | * @cond: condition bits | |
1072 | * @var: the variable to evaluate | |
1073 | * @func: the evaluation function | |
1074 | * @private: the private data pointer passed to function | |
1075 | * @dep: the dependent variables | |
1076 | * | |
1077 | * Returns zero if successful, or a negative error code on failure. | |
1078 | */ | |
877211f5 | 1079 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1080 | int var, |
1081 | snd_pcm_hw_rule_func_t func, void *private, | |
1082 | int dep, ...) | |
1083 | { | |
877211f5 TI |
1084 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1085 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1086 | unsigned int k; |
1087 | va_list args; | |
1088 | va_start(args, dep); | |
1089 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1090 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1091 | unsigned int new_rules = constrs->rules_all + 16; |
1092 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
1093 | if (!new) | |
1094 | return -ENOMEM; | |
1095 | if (constrs->rules) { | |
1096 | memcpy(new, constrs->rules, | |
1097 | constrs->rules_num * sizeof(*c)); | |
1098 | kfree(constrs->rules); | |
1099 | } | |
1100 | constrs->rules = new; | |
1101 | constrs->rules_all = new_rules; | |
1102 | } | |
1103 | c = &constrs->rules[constrs->rules_num]; | |
1104 | c->cond = cond; | |
1105 | c->func = func; | |
1106 | c->var = var; | |
1107 | c->private = private; | |
1108 | k = 0; | |
1109 | while (1) { | |
7eaa943c TI |
1110 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) |
1111 | return -EINVAL; | |
1da177e4 LT |
1112 | c->deps[k++] = dep; |
1113 | if (dep < 0) | |
1114 | break; | |
1115 | dep = va_arg(args, int); | |
1116 | } | |
1117 | constrs->rules_num++; | |
1118 | va_end(args); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
e88e8ae6 TI |
1122 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1123 | ||
1da177e4 | 1124 | /** |
1c85cc64 | 1125 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1126 | * @runtime: PCM runtime instance |
1127 | * @var: hw_params variable to apply the mask | |
1128 | * @mask: the bitmap mask | |
1129 | * | |
1c85cc64 | 1130 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
1da177e4 | 1131 | */ |
877211f5 | 1132 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1133 | u_int32_t mask) |
1134 | { | |
877211f5 TI |
1135 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1136 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1137 | *maskp->bits &= mask; |
1138 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1139 | if (*maskp->bits == 0) | |
1140 | return -EINVAL; | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | /** | |
1c85cc64 | 1145 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1146 | * @runtime: PCM runtime instance |
1147 | * @var: hw_params variable to apply the mask | |
1148 | * @mask: the 64bit bitmap mask | |
1149 | * | |
1c85cc64 | 1150 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
1da177e4 | 1151 | */ |
877211f5 | 1152 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1153 | u_int64_t mask) |
1154 | { | |
877211f5 TI |
1155 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1156 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1157 | maskp->bits[0] &= (u_int32_t)mask; |
1158 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1159 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1160 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1161 | return -EINVAL; | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | /** | |
1c85cc64 | 1166 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1167 | * @runtime: PCM runtime instance |
1168 | * @var: hw_params variable to apply the integer constraint | |
1169 | * | |
1170 | * Apply the constraint of integer to an interval parameter. | |
1da177e4 | 1171 | */ |
877211f5 | 1172 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1173 | { |
877211f5 | 1174 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1175 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1176 | } | |
1177 | ||
e88e8ae6 TI |
1178 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1179 | ||
1da177e4 | 1180 | /** |
1c85cc64 | 1181 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1182 | * @runtime: PCM runtime instance |
1183 | * @var: hw_params variable to apply the range | |
1184 | * @min: the minimal value | |
1185 | * @max: the maximal value | |
1186 | * | |
1187 | * Apply the min/max range constraint to an interval parameter. | |
1da177e4 | 1188 | */ |
877211f5 | 1189 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1190 | unsigned int min, unsigned int max) |
1191 | { | |
877211f5 TI |
1192 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1193 | struct snd_interval t; | |
1da177e4 LT |
1194 | t.min = min; |
1195 | t.max = max; | |
1196 | t.openmin = t.openmax = 0; | |
1197 | t.integer = 0; | |
1198 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1199 | } | |
1200 | ||
e88e8ae6 TI |
1201 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1202 | ||
877211f5 TI |
1203 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1204 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1205 | { |
877211f5 | 1206 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1207 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1208 | } | |
1209 | ||
1210 | ||
1211 | /** | |
1c85cc64 | 1212 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1213 | * @runtime: PCM runtime instance |
1214 | * @cond: condition bits | |
1215 | * @var: hw_params variable to apply the list constraint | |
1216 | * @l: list | |
1217 | * | |
1218 | * Apply the list of constraints to an interval parameter. | |
1da177e4 | 1219 | */ |
877211f5 | 1220 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1221 | unsigned int cond, |
1222 | snd_pcm_hw_param_t var, | |
877211f5 | 1223 | struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1224 | { |
1225 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1226 | snd_pcm_hw_rule_list, l, | |
1227 | var, -1); | |
1228 | } | |
1229 | ||
e88e8ae6 TI |
1230 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1231 | ||
877211f5 TI |
1232 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1233 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1234 | { |
877211f5 | 1235 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1236 | unsigned int num = 0, den = 0; |
1237 | int err; | |
1238 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1239 | r->nrats, r->rats, &num, &den); | |
1240 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1241 | params->rate_num = num; | |
1242 | params->rate_den = den; | |
1243 | } | |
1244 | return err; | |
1245 | } | |
1246 | ||
1247 | /** | |
1c85cc64 | 1248 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1249 | * @runtime: PCM runtime instance |
1250 | * @cond: condition bits | |
1251 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1252 | * @r: struct snd_ratnums constriants |
1da177e4 | 1253 | */ |
877211f5 | 1254 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1255 | unsigned int cond, |
1256 | snd_pcm_hw_param_t var, | |
877211f5 | 1257 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1258 | { |
1259 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1260 | snd_pcm_hw_rule_ratnums, r, | |
1261 | var, -1); | |
1262 | } | |
1263 | ||
e88e8ae6 TI |
1264 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1265 | ||
877211f5 TI |
1266 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1267 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1268 | { |
877211f5 | 1269 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1270 | unsigned int num = 0, den = 0; |
1271 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1272 | r->nrats, r->rats, &num, &den); | |
1273 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1274 | params->rate_num = num; | |
1275 | params->rate_den = den; | |
1276 | } | |
1277 | return err; | |
1278 | } | |
1279 | ||
1280 | /** | |
1c85cc64 | 1281 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1282 | * @runtime: PCM runtime instance |
1283 | * @cond: condition bits | |
1284 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1285 | * @r: struct snd_ratdens constriants |
1da177e4 | 1286 | */ |
877211f5 | 1287 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1288 | unsigned int cond, |
1289 | snd_pcm_hw_param_t var, | |
877211f5 | 1290 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1291 | { |
1292 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1293 | snd_pcm_hw_rule_ratdens, r, | |
1294 | var, -1); | |
1295 | } | |
1296 | ||
e88e8ae6 TI |
1297 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1298 | ||
877211f5 TI |
1299 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1300 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1301 | { |
1302 | unsigned int l = (unsigned long) rule->private; | |
1303 | int width = l & 0xffff; | |
1304 | unsigned int msbits = l >> 16; | |
877211f5 | 1305 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1306 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1307 | params->msbits = msbits; | |
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | /** | |
1c85cc64 | 1312 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1313 | * @runtime: PCM runtime instance |
1314 | * @cond: condition bits | |
1315 | * @width: sample bits width | |
1316 | * @msbits: msbits width | |
1da177e4 | 1317 | */ |
877211f5 | 1318 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1319 | unsigned int cond, |
1320 | unsigned int width, | |
1321 | unsigned int msbits) | |
1322 | { | |
1323 | unsigned long l = (msbits << 16) | width; | |
1324 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1325 | snd_pcm_hw_rule_msbits, | |
1326 | (void*) l, | |
1327 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1328 | } | |
1329 | ||
e88e8ae6 TI |
1330 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1331 | ||
877211f5 TI |
1332 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1333 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1334 | { |
1335 | unsigned long step = (unsigned long) rule->private; | |
1336 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1337 | } | |
1338 | ||
1339 | /** | |
1c85cc64 | 1340 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1341 | * @runtime: PCM runtime instance |
1342 | * @cond: condition bits | |
1343 | * @var: hw_params variable to apply the step constraint | |
1344 | * @step: step size | |
1da177e4 | 1345 | */ |
877211f5 | 1346 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1347 | unsigned int cond, |
1348 | snd_pcm_hw_param_t var, | |
1349 | unsigned long step) | |
1350 | { | |
1351 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1352 | snd_pcm_hw_rule_step, (void *) step, | |
1353 | var, -1); | |
1354 | } | |
1355 | ||
e88e8ae6 TI |
1356 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1357 | ||
877211f5 | 1358 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1359 | { |
67c39317 | 1360 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1361 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1362 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1363 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1364 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1365 | }; | |
1366 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1367 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1368 | } | |
1369 | ||
1370 | /** | |
1c85cc64 | 1371 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1372 | * @runtime: PCM runtime instance |
1373 | * @cond: condition bits | |
1374 | * @var: hw_params variable to apply the power-of-2 constraint | |
1da177e4 | 1375 | */ |
877211f5 | 1376 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1377 | unsigned int cond, |
1378 | snd_pcm_hw_param_t var) | |
1379 | { | |
1380 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1381 | snd_pcm_hw_rule_pow2, NULL, | |
1382 | var, -1); | |
1383 | } | |
1384 | ||
e88e8ae6 TI |
1385 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1386 | ||
877211f5 | 1387 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1388 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1389 | { |
1390 | if (hw_is_mask(var)) { | |
1391 | snd_mask_any(hw_param_mask(params, var)); | |
1392 | params->cmask |= 1 << var; | |
1393 | params->rmask |= 1 << var; | |
1394 | return; | |
1395 | } | |
1396 | if (hw_is_interval(var)) { | |
1397 | snd_interval_any(hw_param_interval(params, var)); | |
1398 | params->cmask |= 1 << var; | |
1399 | params->rmask |= 1 << var; | |
1400 | return; | |
1401 | } | |
1402 | snd_BUG(); | |
1403 | } | |
1404 | ||
877211f5 | 1405 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1406 | { |
1407 | unsigned int k; | |
1408 | memset(params, 0, sizeof(*params)); | |
1409 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1410 | _snd_pcm_hw_param_any(params, k); | |
1411 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1412 | _snd_pcm_hw_param_any(params, k); | |
1413 | params->info = ~0U; | |
1414 | } | |
1415 | ||
e88e8ae6 | 1416 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1417 | |
1418 | /** | |
1c85cc64 | 1419 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1420 | * @params: the hw_params instance |
1421 | * @var: parameter to retrieve | |
1c85cc64 | 1422 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1423 | * |
1c85cc64 RD |
1424 | * Return the value for field @var if it's fixed in configuration space |
1425 | * defined by @params. Return -%EINVAL otherwise. | |
1da177e4 | 1426 | */ |
e88e8ae6 TI |
1427 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1428 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1429 | { |
1430 | if (hw_is_mask(var)) { | |
877211f5 | 1431 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1432 | if (!snd_mask_single(mask)) |
1433 | return -EINVAL; | |
1434 | if (dir) | |
1435 | *dir = 0; | |
1436 | return snd_mask_value(mask); | |
1437 | } | |
1438 | if (hw_is_interval(var)) { | |
877211f5 | 1439 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1440 | if (!snd_interval_single(i)) |
1441 | return -EINVAL; | |
1442 | if (dir) | |
1443 | *dir = i->openmin; | |
1444 | return snd_interval_value(i); | |
1445 | } | |
1da177e4 LT |
1446 | return -EINVAL; |
1447 | } | |
1448 | ||
e88e8ae6 | 1449 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1450 | |
877211f5 | 1451 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1452 | snd_pcm_hw_param_t var) |
1453 | { | |
1454 | if (hw_is_mask(var)) { | |
1455 | snd_mask_none(hw_param_mask(params, var)); | |
1456 | params->cmask |= 1 << var; | |
1457 | params->rmask |= 1 << var; | |
1458 | } else if (hw_is_interval(var)) { | |
1459 | snd_interval_none(hw_param_interval(params, var)); | |
1460 | params->cmask |= 1 << var; | |
1461 | params->rmask |= 1 << var; | |
1462 | } else { | |
1463 | snd_BUG(); | |
1464 | } | |
1465 | } | |
1466 | ||
e88e8ae6 | 1467 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1468 | |
877211f5 | 1469 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1470 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1471 | { |
1472 | int changed; | |
1473 | if (hw_is_mask(var)) | |
1474 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1475 | else if (hw_is_interval(var)) | |
1476 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1477 | else |
1da177e4 | 1478 | return -EINVAL; |
1da177e4 LT |
1479 | if (changed) { |
1480 | params->cmask |= 1 << var; | |
1481 | params->rmask |= 1 << var; | |
1482 | } | |
1483 | return changed; | |
1484 | } | |
1485 | ||
1486 | ||
1487 | /** | |
1c85cc64 | 1488 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1489 | * @pcm: PCM instance |
1490 | * @params: the hw_params instance | |
1491 | * @var: parameter to retrieve | |
1c85cc64 | 1492 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1493 | * |
1c85cc64 | 1494 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1495 | * values > minimum. Reduce configuration space accordingly. |
1496 | * Return the minimum. | |
1497 | */ | |
e88e8ae6 TI |
1498 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1499 | struct snd_pcm_hw_params *params, | |
1500 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1501 | { |
1502 | int changed = _snd_pcm_hw_param_first(params, var); | |
1503 | if (changed < 0) | |
1504 | return changed; | |
1505 | if (params->rmask) { | |
1506 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1507 | if (snd_BUG_ON(err < 0)) |
1508 | return err; | |
1da177e4 LT |
1509 | } |
1510 | return snd_pcm_hw_param_value(params, var, dir); | |
1511 | } | |
1512 | ||
e88e8ae6 TI |
1513 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1514 | ||
877211f5 | 1515 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1516 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1517 | { |
1518 | int changed; | |
1519 | if (hw_is_mask(var)) | |
1520 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1521 | else if (hw_is_interval(var)) | |
1522 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1523 | else |
1da177e4 | 1524 | return -EINVAL; |
1da177e4 LT |
1525 | if (changed) { |
1526 | params->cmask |= 1 << var; | |
1527 | params->rmask |= 1 << var; | |
1528 | } | |
1529 | return changed; | |
1530 | } | |
1531 | ||
1532 | ||
1533 | /** | |
1c85cc64 | 1534 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1535 | * @pcm: PCM instance |
1536 | * @params: the hw_params instance | |
1537 | * @var: parameter to retrieve | |
1c85cc64 | 1538 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1539 | * |
1c85cc64 | 1540 | * Inside configuration space defined by @params remove from @var all |
1da177e4 LT |
1541 | * values < maximum. Reduce configuration space accordingly. |
1542 | * Return the maximum. | |
1543 | */ | |
e88e8ae6 TI |
1544 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1545 | struct snd_pcm_hw_params *params, | |
1546 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1547 | { |
1548 | int changed = _snd_pcm_hw_param_last(params, var); | |
1549 | if (changed < 0) | |
1550 | return changed; | |
1551 | if (params->rmask) { | |
1552 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1553 | if (snd_BUG_ON(err < 0)) |
1554 | return err; | |
1da177e4 LT |
1555 | } |
1556 | return snd_pcm_hw_param_value(params, var, dir); | |
1557 | } | |
1558 | ||
e88e8ae6 | 1559 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1560 | |
1561 | /** | |
1c85cc64 | 1562 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1563 | * @pcm: PCM instance |
1564 | * @params: the hw_params instance | |
1da177e4 | 1565 | * |
1c85cc64 | 1566 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1567 | * The configuration chosen is that obtained fixing in this order: |
1568 | * first access, first format, first subformat, min channels, | |
1569 | * min rate, min period time, max buffer size, min tick time | |
1570 | */ | |
2f4ca8e5 TI |
1571 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1572 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1573 | { |
2f4ca8e5 TI |
1574 | static int vars[] = { |
1575 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1576 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1577 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1578 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1579 | SNDRV_PCM_HW_PARAM_RATE, | |
1580 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1581 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1582 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1583 | -1 | |
1584 | }; | |
1585 | int err, *v; | |
1da177e4 | 1586 | |
2f4ca8e5 TI |
1587 | for (v = vars; *v != -1; v++) { |
1588 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1589 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1590 | else | |
1591 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1592 | if (snd_BUG_ON(err < 0)) |
1593 | return err; | |
2f4ca8e5 | 1594 | } |
1da177e4 LT |
1595 | return 0; |
1596 | } | |
1597 | ||
877211f5 | 1598 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1599 | void *arg) |
1600 | { | |
877211f5 | 1601 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1602 | unsigned long flags; |
1603 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1604 | if (snd_pcm_running(substream) && | |
1605 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1606 | runtime->status->hw_ptr %= runtime->buffer_size; | |
1607 | else | |
1608 | runtime->status->hw_ptr = 0; | |
1609 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1610 | return 0; | |
1611 | } | |
1612 | ||
877211f5 | 1613 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1614 | void *arg) |
1615 | { | |
877211f5 TI |
1616 | struct snd_pcm_channel_info *info = arg; |
1617 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1618 | int width; |
1619 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1620 | info->offset = -1; | |
1621 | return 0; | |
1622 | } | |
1623 | width = snd_pcm_format_physical_width(runtime->format); | |
1624 | if (width < 0) | |
1625 | return width; | |
1626 | info->offset = 0; | |
1627 | switch (runtime->access) { | |
1628 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1629 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1630 | info->first = info->channel * width; | |
1631 | info->step = runtime->channels * width; | |
1632 | break; | |
1633 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1634 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1635 | { | |
1636 | size_t size = runtime->dma_bytes / runtime->channels; | |
1637 | info->first = info->channel * size * 8; | |
1638 | info->step = width; | |
1639 | break; | |
1640 | } | |
1641 | default: | |
1642 | snd_BUG(); | |
1643 | break; | |
1644 | } | |
1645 | return 0; | |
1646 | } | |
1647 | ||
8bea869c JK |
1648 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1649 | void *arg) | |
1650 | { | |
1651 | struct snd_pcm_hw_params *params = arg; | |
1652 | snd_pcm_format_t format; | |
1653 | int channels, width; | |
1654 | ||
1655 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1656 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1657 | format = params_format(params); | |
1658 | channels = params_channels(params); | |
1659 | width = snd_pcm_format_physical_width(format); | |
1660 | params->fifo_size /= width * channels; | |
1661 | } | |
1662 | return 0; | |
1663 | } | |
1664 | ||
1da177e4 LT |
1665 | /** |
1666 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1667 | * @substream: the pcm substream instance | |
1668 | * @cmd: ioctl command | |
1669 | * @arg: ioctl argument | |
1670 | * | |
1671 | * Processes the generic ioctl commands for PCM. | |
1672 | * Can be passed as the ioctl callback for PCM ops. | |
1673 | * | |
1674 | * Returns zero if successful, or a negative error code on failure. | |
1675 | */ | |
877211f5 | 1676 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1677 | unsigned int cmd, void *arg) |
1678 | { | |
1679 | switch (cmd) { | |
1680 | case SNDRV_PCM_IOCTL1_INFO: | |
1681 | return 0; | |
1682 | case SNDRV_PCM_IOCTL1_RESET: | |
1683 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1684 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1685 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1686 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1687 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1688 | } |
1689 | return -ENXIO; | |
1690 | } | |
1691 | ||
e88e8ae6 TI |
1692 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1693 | ||
1da177e4 LT |
1694 | /** |
1695 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1696 | * @substream: the pcm substream instance | |
1697 | * | |
1698 | * This function is called from the interrupt handler when the | |
1699 | * PCM has processed the period size. It will update the current | |
31e8960b | 1700 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1701 | * |
1702 | * Even if more than one periods have elapsed since the last call, you | |
1703 | * have to call this only once. | |
1704 | */ | |
877211f5 | 1705 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1706 | { |
877211f5 | 1707 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1708 | unsigned long flags; |
1709 | ||
7eaa943c TI |
1710 | if (PCM_RUNTIME_CHECK(substream)) |
1711 | return; | |
1da177e4 | 1712 | runtime = substream->runtime; |
1da177e4 LT |
1713 | |
1714 | if (runtime->transfer_ack_begin) | |
1715 | runtime->transfer_ack_begin(substream); | |
1716 | ||
1717 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1718 | if (!snd_pcm_running(substream) || | |
f240406b | 1719 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1720 | goto _end; |
1721 | ||
1722 | if (substream->timer_running) | |
1723 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1724 | _end: |
1725 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1726 | if (runtime->transfer_ack_end) | |
1727 | runtime->transfer_ack_end(substream); | |
1728 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1729 | } | |
1730 | ||
e88e8ae6 TI |
1731 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1732 | ||
13075510 TI |
1733 | /* |
1734 | * Wait until avail_min data becomes available | |
1735 | * Returns a negative error code if any error occurs during operation. | |
1736 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1737 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1738 | */ | |
5daeba34 | 1739 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1740 | snd_pcm_uframes_t *availp) |
1741 | { | |
1742 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1743 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1744 | wait_queue_t wait; | |
1745 | int err = 0; | |
1746 | snd_pcm_uframes_t avail = 0; | |
1747 | long tout; | |
1748 | ||
1749 | init_waitqueue_entry(&wait, current); | |
c91a988d | 1750 | add_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1751 | for (;;) { |
1752 | if (signal_pending(current)) { | |
1753 | err = -ERESTARTSYS; | |
1754 | break; | |
1755 | } | |
1756 | set_current_state(TASK_INTERRUPTIBLE); | |
1757 | snd_pcm_stream_unlock_irq(substream); | |
1758 | tout = schedule_timeout(msecs_to_jiffies(10000)); | |
1759 | snd_pcm_stream_lock_irq(substream); | |
1760 | switch (runtime->status->state) { | |
1761 | case SNDRV_PCM_STATE_SUSPENDED: | |
1762 | err = -ESTRPIPE; | |
1763 | goto _endloop; | |
1764 | case SNDRV_PCM_STATE_XRUN: | |
1765 | err = -EPIPE; | |
1766 | goto _endloop; | |
1767 | case SNDRV_PCM_STATE_DRAINING: | |
1768 | if (is_playback) | |
1769 | err = -EPIPE; | |
1770 | else | |
1771 | avail = 0; /* indicate draining */ | |
1772 | goto _endloop; | |
1773 | case SNDRV_PCM_STATE_OPEN: | |
1774 | case SNDRV_PCM_STATE_SETUP: | |
1775 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1776 | err = -EBADFD; | |
1777 | goto _endloop; | |
1778 | } | |
1779 | if (!tout) { | |
1780 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1781 | is_playback ? "playback" : "capture"); | |
1782 | err = -EIO; | |
1783 | break; | |
1784 | } | |
1785 | if (is_playback) | |
1786 | avail = snd_pcm_playback_avail(runtime); | |
1787 | else | |
1788 | avail = snd_pcm_capture_avail(runtime); | |
5daeba34 | 1789 | if (avail >= runtime->twake) |
13075510 TI |
1790 | break; |
1791 | } | |
1792 | _endloop: | |
c91a988d | 1793 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1794 | *availp = avail; |
1795 | return err; | |
1796 | } | |
1797 | ||
877211f5 | 1798 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1799 | unsigned int hwoff, |
1800 | unsigned long data, unsigned int off, | |
1801 | snd_pcm_uframes_t frames) | |
1802 | { | |
877211f5 | 1803 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1804 | int err; |
1805 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1806 | if (substream->ops->copy) { | |
1807 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1808 | return err; | |
1809 | } else { | |
1810 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1811 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1812 | return -EFAULT; | |
1813 | } | |
1814 | return 0; | |
1815 | } | |
1816 | ||
877211f5 | 1817 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1818 | unsigned long data, unsigned int off, |
1819 | snd_pcm_uframes_t size); | |
1820 | ||
877211f5 | 1821 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1822 | unsigned long data, |
1823 | snd_pcm_uframes_t size, | |
1824 | int nonblock, | |
1825 | transfer_f transfer) | |
1826 | { | |
877211f5 | 1827 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1828 | snd_pcm_uframes_t xfer = 0; |
1829 | snd_pcm_uframes_t offset = 0; | |
1830 | int err = 0; | |
1831 | ||
1832 | if (size == 0) | |
1833 | return 0; | |
1da177e4 LT |
1834 | |
1835 | snd_pcm_stream_lock_irq(substream); | |
1836 | switch (runtime->status->state) { | |
1837 | case SNDRV_PCM_STATE_PREPARED: | |
1838 | case SNDRV_PCM_STATE_RUNNING: | |
1839 | case SNDRV_PCM_STATE_PAUSED: | |
1840 | break; | |
1841 | case SNDRV_PCM_STATE_XRUN: | |
1842 | err = -EPIPE; | |
1843 | goto _end_unlock; | |
1844 | case SNDRV_PCM_STATE_SUSPENDED: | |
1845 | err = -ESTRPIPE; | |
1846 | goto _end_unlock; | |
1847 | default: | |
1848 | err = -EBADFD; | |
1849 | goto _end_unlock; | |
1850 | } | |
1851 | ||
5daeba34 | 1852 | runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4 LT |
1853 | while (size > 0) { |
1854 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1855 | snd_pcm_uframes_t avail; | |
1856 | snd_pcm_uframes_t cont; | |
31e8960b | 1857 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 LT |
1858 | snd_pcm_update_hw_ptr(substream); |
1859 | avail = snd_pcm_playback_avail(runtime); | |
13075510 | 1860 | if (!avail) { |
1da177e4 LT |
1861 | if (nonblock) { |
1862 | err = -EAGAIN; | |
1863 | goto _end_unlock; | |
1864 | } | |
5daeba34 DD |
1865 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
1866 | runtime->control->avail_min ? : 1); | |
1867 | err = wait_for_avail(substream, &avail); | |
13075510 | 1868 | if (err < 0) |
443feb88 | 1869 | goto _end_unlock; |
1da177e4 | 1870 | } |
1da177e4 LT |
1871 | frames = size > avail ? avail : size; |
1872 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
1873 | if (frames > cont) | |
1874 | frames = cont; | |
7eaa943c | 1875 | if (snd_BUG_ON(!frames)) { |
c91a988d | 1876 | runtime->twake = 0; |
7eaa943c TI |
1877 | snd_pcm_stream_unlock_irq(substream); |
1878 | return -EINVAL; | |
1879 | } | |
1da177e4 LT |
1880 | appl_ptr = runtime->control->appl_ptr; |
1881 | appl_ofs = appl_ptr % runtime->buffer_size; | |
1882 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 1883 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 1884 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
1885 | if (err < 0) |
1886 | goto _end_unlock; | |
1da177e4 LT |
1887 | switch (runtime->status->state) { |
1888 | case SNDRV_PCM_STATE_XRUN: | |
1889 | err = -EPIPE; | |
1890 | goto _end_unlock; | |
1891 | case SNDRV_PCM_STATE_SUSPENDED: | |
1892 | err = -ESTRPIPE; | |
1893 | goto _end_unlock; | |
1894 | default: | |
1895 | break; | |
1896 | } | |
1897 | appl_ptr += frames; | |
1898 | if (appl_ptr >= runtime->boundary) | |
1899 | appl_ptr -= runtime->boundary; | |
1900 | runtime->control->appl_ptr = appl_ptr; | |
1901 | if (substream->ops->ack) | |
1902 | substream->ops->ack(substream); | |
1903 | ||
1904 | offset += frames; | |
1905 | size -= frames; | |
1906 | xfer += frames; | |
1907 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && | |
1908 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
1909 | err = snd_pcm_start(substream); | |
1910 | if (err < 0) | |
1911 | goto _end_unlock; | |
1912 | } | |
1da177e4 LT |
1913 | } |
1914 | _end_unlock: | |
c91a988d | 1915 | runtime->twake = 0; |
1250932e JK |
1916 | if (xfer > 0 && err >= 0) |
1917 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 1918 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
1919 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
1920 | } | |
1921 | ||
7eaa943c TI |
1922 | /* sanity-check for read/write methods */ |
1923 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 1924 | { |
877211f5 | 1925 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
1926 | if (PCM_RUNTIME_CHECK(substream)) |
1927 | return -ENXIO; | |
1da177e4 | 1928 | runtime = substream->runtime; |
7eaa943c TI |
1929 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
1930 | return -EINVAL; | |
1da177e4 LT |
1931 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
1932 | return -EBADFD; | |
7eaa943c TI |
1933 | return 0; |
1934 | } | |
1935 | ||
1936 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
1937 | { | |
1938 | struct snd_pcm_runtime *runtime; | |
1939 | int nonblock; | |
1940 | int err; | |
1da177e4 | 1941 | |
7eaa943c TI |
1942 | err = pcm_sanity_check(substream); |
1943 | if (err < 0) | |
1944 | return err; | |
1945 | runtime = substream->runtime; | |
0df63e44 | 1946 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
1947 | |
1948 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
1949 | runtime->channels > 1) | |
1950 | return -EINVAL; | |
1951 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
1952 | snd_pcm_lib_write_transfer); | |
1953 | } | |
1954 | ||
e88e8ae6 TI |
1955 | EXPORT_SYMBOL(snd_pcm_lib_write); |
1956 | ||
877211f5 | 1957 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1958 | unsigned int hwoff, |
1959 | unsigned long data, unsigned int off, | |
1960 | snd_pcm_uframes_t frames) | |
1961 | { | |
877211f5 | 1962 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1963 | int err; |
1964 | void __user **bufs = (void __user **)data; | |
1965 | int channels = runtime->channels; | |
1966 | int c; | |
1967 | if (substream->ops->copy) { | |
7eaa943c TI |
1968 | if (snd_BUG_ON(!substream->ops->silence)) |
1969 | return -EINVAL; | |
1da177e4 LT |
1970 | for (c = 0; c < channels; ++c, ++bufs) { |
1971 | if (*bufs == NULL) { | |
1972 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
1973 | return err; | |
1974 | } else { | |
1975 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1976 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
1977 | return err; | |
1978 | } | |
1979 | } | |
1980 | } else { | |
1981 | /* default transfer behaviour */ | |
1982 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
1983 | for (c = 0; c < channels; ++c, ++bufs) { |
1984 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
1985 | if (*bufs == NULL) { | |
1986 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
1987 | } else { | |
1988 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
1989 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
1990 | return -EFAULT; | |
1991 | } | |
1992 | } | |
1993 | } | |
1994 | return 0; | |
1995 | } | |
1996 | ||
877211f5 | 1997 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
1998 | void __user **bufs, |
1999 | snd_pcm_uframes_t frames) | |
2000 | { | |
877211f5 | 2001 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2002 | int nonblock; |
7eaa943c | 2003 | int err; |
1da177e4 | 2004 | |
7eaa943c TI |
2005 | err = pcm_sanity_check(substream); |
2006 | if (err < 0) | |
2007 | return err; | |
1da177e4 | 2008 | runtime = substream->runtime; |
0df63e44 | 2009 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2010 | |
2011 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2012 | return -EINVAL; | |
2013 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2014 | nonblock, snd_pcm_lib_writev_transfer); | |
2015 | } | |
2016 | ||
e88e8ae6 TI |
2017 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
2018 | ||
877211f5 | 2019 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2020 | unsigned int hwoff, |
2021 | unsigned long data, unsigned int off, | |
2022 | snd_pcm_uframes_t frames) | |
2023 | { | |
877211f5 | 2024 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2025 | int err; |
2026 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2027 | if (substream->ops->copy) { | |
2028 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2029 | return err; | |
2030 | } else { | |
2031 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2032 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2033 | return -EFAULT; | |
2034 | } | |
2035 | return 0; | |
2036 | } | |
2037 | ||
877211f5 | 2038 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2039 | unsigned long data, |
2040 | snd_pcm_uframes_t size, | |
2041 | int nonblock, | |
2042 | transfer_f transfer) | |
2043 | { | |
877211f5 | 2044 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2045 | snd_pcm_uframes_t xfer = 0; |
2046 | snd_pcm_uframes_t offset = 0; | |
2047 | int err = 0; | |
2048 | ||
2049 | if (size == 0) | |
2050 | return 0; | |
1da177e4 LT |
2051 | |
2052 | snd_pcm_stream_lock_irq(substream); | |
2053 | switch (runtime->status->state) { | |
2054 | case SNDRV_PCM_STATE_PREPARED: | |
2055 | if (size >= runtime->start_threshold) { | |
2056 | err = snd_pcm_start(substream); | |
2057 | if (err < 0) | |
2058 | goto _end_unlock; | |
2059 | } | |
2060 | break; | |
2061 | case SNDRV_PCM_STATE_DRAINING: | |
2062 | case SNDRV_PCM_STATE_RUNNING: | |
2063 | case SNDRV_PCM_STATE_PAUSED: | |
2064 | break; | |
2065 | case SNDRV_PCM_STATE_XRUN: | |
2066 | err = -EPIPE; | |
2067 | goto _end_unlock; | |
2068 | case SNDRV_PCM_STATE_SUSPENDED: | |
2069 | err = -ESTRPIPE; | |
2070 | goto _end_unlock; | |
2071 | default: | |
2072 | err = -EBADFD; | |
2073 | goto _end_unlock; | |
2074 | } | |
2075 | ||
5daeba34 | 2076 | runtime->twake = runtime->control->avail_min ? : 1; |
1da177e4 LT |
2077 | while (size > 0) { |
2078 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
2079 | snd_pcm_uframes_t avail; | |
2080 | snd_pcm_uframes_t cont; | |
31e8960b | 2081 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
1da177e4 | 2082 | snd_pcm_update_hw_ptr(substream); |
1da177e4 | 2083 | avail = snd_pcm_capture_avail(runtime); |
13075510 TI |
2084 | if (!avail) { |
2085 | if (runtime->status->state == | |
2086 | SNDRV_PCM_STATE_DRAINING) { | |
2087 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2088 | goto _end_unlock; |
2089 | } | |
1da177e4 LT |
2090 | if (nonblock) { |
2091 | err = -EAGAIN; | |
2092 | goto _end_unlock; | |
2093 | } | |
5daeba34 DD |
2094 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2095 | runtime->control->avail_min ? : 1); | |
2096 | err = wait_for_avail(substream, &avail); | |
13075510 | 2097 | if (err < 0) |
443feb88 | 2098 | goto _end_unlock; |
13075510 TI |
2099 | if (!avail) |
2100 | continue; /* draining */ | |
1da177e4 | 2101 | } |
1da177e4 LT |
2102 | frames = size > avail ? avail : size; |
2103 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2104 | if (frames > cont) | |
2105 | frames = cont; | |
7eaa943c | 2106 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2107 | runtime->twake = 0; |
7eaa943c TI |
2108 | snd_pcm_stream_unlock_irq(substream); |
2109 | return -EINVAL; | |
2110 | } | |
1da177e4 LT |
2111 | appl_ptr = runtime->control->appl_ptr; |
2112 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2113 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2114 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2115 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2116 | if (err < 0) |
2117 | goto _end_unlock; | |
1da177e4 LT |
2118 | switch (runtime->status->state) { |
2119 | case SNDRV_PCM_STATE_XRUN: | |
2120 | err = -EPIPE; | |
2121 | goto _end_unlock; | |
2122 | case SNDRV_PCM_STATE_SUSPENDED: | |
2123 | err = -ESTRPIPE; | |
2124 | goto _end_unlock; | |
2125 | default: | |
2126 | break; | |
2127 | } | |
2128 | appl_ptr += frames; | |
2129 | if (appl_ptr >= runtime->boundary) | |
2130 | appl_ptr -= runtime->boundary; | |
2131 | runtime->control->appl_ptr = appl_ptr; | |
2132 | if (substream->ops->ack) | |
2133 | substream->ops->ack(substream); | |
2134 | ||
2135 | offset += frames; | |
2136 | size -= frames; | |
2137 | xfer += frames; | |
1da177e4 LT |
2138 | } |
2139 | _end_unlock: | |
c91a988d | 2140 | runtime->twake = 0; |
1250932e JK |
2141 | if (xfer > 0 && err >= 0) |
2142 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2143 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2144 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2145 | } | |
2146 | ||
877211f5 | 2147 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2148 | { |
877211f5 | 2149 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2150 | int nonblock; |
7eaa943c | 2151 | int err; |
1da177e4 | 2152 | |
7eaa943c TI |
2153 | err = pcm_sanity_check(substream); |
2154 | if (err < 0) | |
2155 | return err; | |
1da177e4 | 2156 | runtime = substream->runtime; |
0df63e44 | 2157 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2158 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2159 | return -EINVAL; | |
2160 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2161 | } | |
2162 | ||
e88e8ae6 TI |
2163 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2164 | ||
877211f5 | 2165 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2166 | unsigned int hwoff, |
2167 | unsigned long data, unsigned int off, | |
2168 | snd_pcm_uframes_t frames) | |
2169 | { | |
877211f5 | 2170 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2171 | int err; |
2172 | void __user **bufs = (void __user **)data; | |
2173 | int channels = runtime->channels; | |
2174 | int c; | |
2175 | if (substream->ops->copy) { | |
2176 | for (c = 0; c < channels; ++c, ++bufs) { | |
2177 | char __user *buf; | |
2178 | if (*bufs == NULL) | |
2179 | continue; | |
2180 | buf = *bufs + samples_to_bytes(runtime, off); | |
2181 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2182 | return err; | |
2183 | } | |
2184 | } else { | |
2185 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2186 | for (c = 0; c < channels; ++c, ++bufs) { |
2187 | char *hwbuf; | |
2188 | char __user *buf; | |
2189 | if (*bufs == NULL) | |
2190 | continue; | |
2191 | ||
2192 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2193 | buf = *bufs + samples_to_bytes(runtime, off); | |
2194 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2195 | return -EFAULT; | |
2196 | } | |
2197 | } | |
2198 | return 0; | |
2199 | } | |
2200 | ||
877211f5 | 2201 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2202 | void __user **bufs, |
2203 | snd_pcm_uframes_t frames) | |
2204 | { | |
877211f5 | 2205 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2206 | int nonblock; |
7eaa943c | 2207 | int err; |
1da177e4 | 2208 | |
7eaa943c TI |
2209 | err = pcm_sanity_check(substream); |
2210 | if (err < 0) | |
2211 | return err; | |
1da177e4 | 2212 | runtime = substream->runtime; |
1da177e4 LT |
2213 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2214 | return -EBADFD; | |
2215 | ||
0df63e44 | 2216 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2217 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2218 | return -EINVAL; | |
2219 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2220 | } | |
2221 | ||
1da177e4 | 2222 | EXPORT_SYMBOL(snd_pcm_lib_readv); |