Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Digital Audio (PCM) abstract layer | |
c1017a4c | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
4 | * Abramo Bagnara <abramo@alsa-project.org> |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/slab.h> |
24 | #include <linux/time.h> | |
3f7440a6 | 25 | #include <linux/math64.h> |
d81a6d71 | 26 | #include <linux/export.h> |
1da177e4 LT |
27 | #include <sound/core.h> |
28 | #include <sound/control.h> | |
2d3391ec | 29 | #include <sound/tlv.h> |
1da177e4 LT |
30 | #include <sound/info.h> |
31 | #include <sound/pcm.h> | |
32 | #include <sound/pcm_params.h> | |
33 | #include <sound/timer.h> | |
34 | ||
35 | /* | |
36 | * fill ring buffer with silence | |
37 | * runtime->silence_start: starting pointer to silence area | |
38 | * runtime->silence_filled: size filled with silence | |
39 | * runtime->silence_threshold: threshold from application | |
40 | * runtime->silence_size: maximal size from application | |
41 | * | |
42 | * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately | |
43 | */ | |
877211f5 | 44 | void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) |
1da177e4 | 45 | { |
877211f5 | 46 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
47 | snd_pcm_uframes_t frames, ofs, transfer; |
48 | ||
49 | if (runtime->silence_size < runtime->boundary) { | |
50 | snd_pcm_sframes_t noise_dist, n; | |
51 | if (runtime->silence_start != runtime->control->appl_ptr) { | |
52 | n = runtime->control->appl_ptr - runtime->silence_start; | |
53 | if (n < 0) | |
54 | n += runtime->boundary; | |
55 | if ((snd_pcm_uframes_t)n < runtime->silence_filled) | |
56 | runtime->silence_filled -= n; | |
57 | else | |
58 | runtime->silence_filled = 0; | |
59 | runtime->silence_start = runtime->control->appl_ptr; | |
60 | } | |
235475cb | 61 | if (runtime->silence_filled >= runtime->buffer_size) |
1da177e4 | 62 | return; |
1da177e4 LT |
63 | noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; |
64 | if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) | |
65 | return; | |
66 | frames = runtime->silence_threshold - noise_dist; | |
67 | if (frames > runtime->silence_size) | |
68 | frames = runtime->silence_size; | |
69 | } else { | |
70 | if (new_hw_ptr == ULONG_MAX) { /* initialization */ | |
71 | snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); | |
9e216e8a JK |
72 | if (avail > runtime->buffer_size) |
73 | avail = runtime->buffer_size; | |
1da177e4 LT |
74 | runtime->silence_filled = avail > 0 ? avail : 0; |
75 | runtime->silence_start = (runtime->status->hw_ptr + | |
76 | runtime->silence_filled) % | |
77 | runtime->boundary; | |
78 | } else { | |
79 | ofs = runtime->status->hw_ptr; | |
80 | frames = new_hw_ptr - ofs; | |
81 | if ((snd_pcm_sframes_t)frames < 0) | |
82 | frames += runtime->boundary; | |
83 | runtime->silence_filled -= frames; | |
84 | if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { | |
85 | runtime->silence_filled = 0; | |
9a826ddb | 86 | runtime->silence_start = new_hw_ptr; |
1da177e4 | 87 | } else { |
9a826ddb | 88 | runtime->silence_start = ofs; |
1da177e4 | 89 | } |
1da177e4 LT |
90 | } |
91 | frames = runtime->buffer_size - runtime->silence_filled; | |
92 | } | |
7eaa943c TI |
93 | if (snd_BUG_ON(frames > runtime->buffer_size)) |
94 | return; | |
1da177e4 LT |
95 | if (frames == 0) |
96 | return; | |
9a826ddb | 97 | ofs = runtime->silence_start % runtime->buffer_size; |
1da177e4 LT |
98 | while (frames > 0) { |
99 | transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; | |
100 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || | |
101 | runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { | |
102 | if (substream->ops->silence) { | |
103 | int err; | |
104 | err = substream->ops->silence(substream, -1, ofs, transfer); | |
7eaa943c | 105 | snd_BUG_ON(err < 0); |
1da177e4 LT |
106 | } else { |
107 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); | |
108 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); | |
109 | } | |
110 | } else { | |
111 | unsigned int c; | |
112 | unsigned int channels = runtime->channels; | |
113 | if (substream->ops->silence) { | |
114 | for (c = 0; c < channels; ++c) { | |
115 | int err; | |
116 | err = substream->ops->silence(substream, c, ofs, transfer); | |
7eaa943c | 117 | snd_BUG_ON(err < 0); |
1da177e4 LT |
118 | } |
119 | } else { | |
120 | size_t dma_csize = runtime->dma_bytes / channels; | |
121 | for (c = 0; c < channels; ++c) { | |
122 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); | |
123 | snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); | |
124 | } | |
125 | } | |
126 | } | |
127 | runtime->silence_filled += transfer; | |
128 | frames -= transfer; | |
129 | ofs = 0; | |
130 | } | |
131 | } | |
132 | ||
acb03d44 EB |
133 | #ifdef CONFIG_SND_DEBUG |
134 | void snd_pcm_debug_name(struct snd_pcm_substream *substream, | |
c0070110 TI |
135 | char *name, size_t len) |
136 | { | |
137 | snprintf(name, len, "pcmC%dD%d%c:%d", | |
138 | substream->pcm->card->number, | |
139 | substream->pcm->device, | |
140 | substream->stream ? 'c' : 'p', | |
141 | substream->number); | |
142 | } | |
acb03d44 EB |
143 | EXPORT_SYMBOL(snd_pcm_debug_name); |
144 | #endif | |
c0070110 | 145 | |
741b20cf JK |
146 | #define XRUN_DEBUG_BASIC (1<<0) |
147 | #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ | |
148 | #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ | |
149 | #define XRUN_DEBUG_PERIODUPDATE (1<<3) /* full period update info */ | |
150 | #define XRUN_DEBUG_HWPTRUPDATE (1<<4) /* full hwptr update info */ | |
4d96eb25 JK |
151 | #define XRUN_DEBUG_LOG (1<<5) /* show last 10 positions on err */ |
152 | #define XRUN_DEBUG_LOGONCE (1<<6) /* do above only once */ | |
741b20cf | 153 | |
ed3da3d9 | 154 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 | 155 | |
741b20cf JK |
156 | #define xrun_debug(substream, mask) \ |
157 | ((substream)->pstr->xrun_debug & (mask)) | |
0f17014b JN |
158 | #else |
159 | #define xrun_debug(substream, mask) 0 | |
160 | #endif | |
ed3da3d9 | 161 | |
741b20cf JK |
162 | #define dump_stack_on_xrun(substream) do { \ |
163 | if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ | |
164 | dump_stack(); \ | |
ed3da3d9 TI |
165 | } while (0) |
166 | ||
877211f5 | 167 | static void xrun(struct snd_pcm_substream *substream) |
1da177e4 | 168 | { |
13f040f9 JK |
169 | struct snd_pcm_runtime *runtime = substream->runtime; |
170 | ||
171 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) | |
172 | snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); | |
1da177e4 | 173 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
741b20cf | 174 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { |
c0070110 | 175 | char name[16]; |
acb03d44 | 176 | snd_pcm_debug_name(substream, name, sizeof(name)); |
c0070110 | 177 | snd_printd(KERN_DEBUG "XRUN: %s\n", name); |
ed3da3d9 | 178 | dump_stack_on_xrun(substream); |
1da177e4 | 179 | } |
1da177e4 LT |
180 | } |
181 | ||
0f17014b | 182 | #ifdef CONFIG_SND_PCM_XRUN_DEBUG |
4d96eb25 JK |
183 | #define hw_ptr_error(substream, fmt, args...) \ |
184 | do { \ | |
185 | if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ | |
f240406b | 186 | xrun_log_show(substream); \ |
74d779ab | 187 | if (snd_printd_ratelimit()) { \ |
4d96eb25 JK |
188 | snd_printd("PCM: " fmt, ##args); \ |
189 | } \ | |
190 | dump_stack_on_xrun(substream); \ | |
191 | } \ | |
192 | } while (0) | |
193 | ||
194 | #define XRUN_LOG_CNT 10 | |
195 | ||
196 | struct hwptr_log_entry { | |
ec08b144 | 197 | unsigned int in_interrupt; |
4d96eb25 | 198 | unsigned long jiffies; |
1da177e4 | 199 | snd_pcm_uframes_t pos; |
4d96eb25 JK |
200 | snd_pcm_uframes_t period_size; |
201 | snd_pcm_uframes_t buffer_size; | |
202 | snd_pcm_uframes_t old_hw_ptr; | |
203 | snd_pcm_uframes_t hw_ptr_base; | |
4d96eb25 | 204 | }; |
1da177e4 | 205 | |
4d96eb25 JK |
206 | struct snd_pcm_hwptr_log { |
207 | unsigned int idx; | |
208 | unsigned int hit: 1; | |
209 | struct hwptr_log_entry entries[XRUN_LOG_CNT]; | |
210 | }; | |
211 | ||
212 | static void xrun_log(struct snd_pcm_substream *substream, | |
ec08b144 | 213 | snd_pcm_uframes_t pos, int in_interrupt) |
4d96eb25 JK |
214 | { |
215 | struct snd_pcm_runtime *runtime = substream->runtime; | |
216 | struct snd_pcm_hwptr_log *log = runtime->hwptr_log; | |
217 | struct hwptr_log_entry *entry; | |
218 | ||
219 | if (log == NULL) { | |
220 | log = kzalloc(sizeof(*log), GFP_ATOMIC); | |
221 | if (log == NULL) | |
222 | return; | |
223 | runtime->hwptr_log = log; | |
224 | } else { | |
225 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
226 | return; | |
7c22f1aa | 227 | } |
4d96eb25 | 228 | entry = &log->entries[log->idx]; |
ec08b144 | 229 | entry->in_interrupt = in_interrupt; |
4d96eb25 JK |
230 | entry->jiffies = jiffies; |
231 | entry->pos = pos; | |
232 | entry->period_size = runtime->period_size; | |
c80c1d54 | 233 | entry->buffer_size = runtime->buffer_size; |
4d96eb25 JK |
234 | entry->old_hw_ptr = runtime->status->hw_ptr; |
235 | entry->hw_ptr_base = runtime->hw_ptr_base; | |
4d96eb25 | 236 | log->idx = (log->idx + 1) % XRUN_LOG_CNT; |
1da177e4 LT |
237 | } |
238 | ||
4d96eb25 JK |
239 | static void xrun_log_show(struct snd_pcm_substream *substream) |
240 | { | |
241 | struct snd_pcm_hwptr_log *log = substream->runtime->hwptr_log; | |
242 | struct hwptr_log_entry *entry; | |
243 | char name[16]; | |
244 | unsigned int idx; | |
245 | int cnt; | |
246 | ||
247 | if (log == NULL) | |
248 | return; | |
249 | if (xrun_debug(substream, XRUN_DEBUG_LOGONCE) && log->hit) | |
250 | return; | |
acb03d44 | 251 | snd_pcm_debug_name(substream, name, sizeof(name)); |
4d96eb25 JK |
252 | for (cnt = 0, idx = log->idx; cnt < XRUN_LOG_CNT; cnt++) { |
253 | entry = &log->entries[idx]; | |
254 | if (entry->period_size == 0) | |
255 | break; | |
ec08b144 | 256 | snd_printd("hwptr log: %s: %sj=%lu, pos=%ld/%ld/%ld, " |
f240406b | 257 | "hwptr=%ld/%ld\n", |
ec08b144 BG |
258 | name, entry->in_interrupt ? "[Q] " : "", |
259 | entry->jiffies, | |
260 | (unsigned long)entry->pos, | |
4d96eb25 JK |
261 | (unsigned long)entry->period_size, |
262 | (unsigned long)entry->buffer_size, | |
263 | (unsigned long)entry->old_hw_ptr, | |
f240406b | 264 | (unsigned long)entry->hw_ptr_base); |
4d96eb25 JK |
265 | idx++; |
266 | idx %= XRUN_LOG_CNT; | |
267 | } | |
268 | log->hit = 1; | |
269 | } | |
270 | ||
271 | #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ | |
272 | ||
4d96eb25 | 273 | #define hw_ptr_error(substream, fmt, args...) do { } while (0) |
217658f4 | 274 | #define xrun_log(substream, pos, in_interrupt) do { } while (0) |
4d96eb25 JK |
275 | #define xrun_log_show(substream) do { } while (0) |
276 | ||
277 | #endif | |
278 | ||
1250932e JK |
279 | int snd_pcm_update_state(struct snd_pcm_substream *substream, |
280 | struct snd_pcm_runtime *runtime) | |
1da177e4 LT |
281 | { |
282 | snd_pcm_uframes_t avail; | |
283 | ||
284 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
285 | avail = snd_pcm_playback_avail(runtime); | |
286 | else | |
287 | avail = snd_pcm_capture_avail(runtime); | |
288 | if (avail > runtime->avail_max) | |
289 | runtime->avail_max = avail; | |
4cdc115f TI |
290 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
291 | if (avail >= runtime->buffer_size) { | |
1da177e4 | 292 | snd_pcm_drain_done(substream); |
4cdc115f TI |
293 | return -EPIPE; |
294 | } | |
295 | } else { | |
296 | if (avail >= runtime->stop_threshold) { | |
1da177e4 | 297 | xrun(substream); |
4cdc115f TI |
298 | return -EPIPE; |
299 | } | |
1da177e4 | 300 | } |
5daeba34 DD |
301 | if (runtime->twake) { |
302 | if (avail >= runtime->twake) | |
303 | wake_up(&runtime->tsleep); | |
304 | } else if (avail >= runtime->control->avail_min) | |
305 | wake_up(&runtime->sleep); | |
1da177e4 LT |
306 | return 0; |
307 | } | |
308 | ||
f240406b JK |
309 | static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, |
310 | unsigned int in_interrupt) | |
1da177e4 | 311 | { |
877211f5 | 312 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 | 313 | snd_pcm_uframes_t pos; |
f240406b | 314 | snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; |
bbf6ad13 JK |
315 | snd_pcm_sframes_t hdelta, delta; |
316 | unsigned long jdelta; | |
3509a03f PLB |
317 | unsigned long curr_jiffies; |
318 | struct timespec curr_tstamp; | |
4eeaaeae | 319 | struct timespec audio_tstamp; |
0e8014d7 | 320 | int crossed_boundary = 0; |
1da177e4 | 321 | |
bbf6ad13 | 322 | old_hw_ptr = runtime->status->hw_ptr; |
3509a03f PLB |
323 | |
324 | /* | |
325 | * group pointer, time and jiffies reads to allow for more | |
326 | * accurate correlations/corrections. | |
327 | * The values are stored at the end of this routine after | |
328 | * corrections for hw_ptr position | |
329 | */ | |
f240406b | 330 | pos = substream->ops->pointer(substream); |
3509a03f | 331 | curr_jiffies = jiffies; |
4eeaaeae | 332 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f PLB |
333 | snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); |
334 | ||
4eeaaeae PLB |
335 | if ((runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK) && |
336 | (substream->ops->wall_clock)) | |
337 | substream->ops->wall_clock(substream, &audio_tstamp); | |
338 | } | |
339 | ||
1da177e4 LT |
340 | if (pos == SNDRV_PCM_POS_XRUN) { |
341 | xrun(substream); | |
342 | return -EPIPE; | |
343 | } | |
f240406b | 344 | if (pos >= runtime->buffer_size) { |
74d779ab | 345 | if (snd_printd_ratelimit()) { |
f240406b | 346 | char name[16]; |
acb03d44 | 347 | snd_pcm_debug_name(substream, name, sizeof(name)); |
f240406b JK |
348 | xrun_log_show(substream); |
349 | snd_printd(KERN_ERR "BUG: %s, pos = %ld, " | |
350 | "buffer size = %ld, period size = %ld\n", | |
351 | name, pos, runtime->buffer_size, | |
352 | runtime->period_size); | |
353 | } | |
354 | pos = 0; | |
cedb8118 | 355 | } |
f240406b JK |
356 | pos -= pos % runtime->min_align; |
357 | if (xrun_debug(substream, XRUN_DEBUG_LOG)) | |
ec08b144 | 358 | xrun_log(substream, pos, in_interrupt); |
ed3da3d9 TI |
359 | hw_base = runtime->hw_ptr_base; |
360 | new_hw_ptr = hw_base + pos; | |
f240406b JK |
361 | if (in_interrupt) { |
362 | /* we know that one period was processed */ | |
363 | /* delta = "expected next hw_ptr" for in_interrupt != 0 */ | |
e7636925 | 364 | delta = runtime->hw_ptr_interrupt + runtime->period_size; |
f240406b | 365 | if (delta > new_hw_ptr) { |
bd76af0f | 366 | /* check for double acknowledged interrupts */ |
3509a03f | 367 | hdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bd76af0f JK |
368 | if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { |
369 | hw_base += runtime->buffer_size; | |
0e8014d7 | 370 | if (hw_base >= runtime->boundary) { |
bd76af0f | 371 | hw_base = 0; |
0e8014d7 PLB |
372 | crossed_boundary++; |
373 | } | |
bd76af0f JK |
374 | new_hw_ptr = hw_base + pos; |
375 | goto __delta; | |
376 | } | |
1da177e4 | 377 | } |
1da177e4 | 378 | } |
f240406b JK |
379 | /* new_hw_ptr might be lower than old_hw_ptr in case when */ |
380 | /* pointer crosses the end of the ring buffer */ | |
381 | if (new_hw_ptr < old_hw_ptr) { | |
382 | hw_base += runtime->buffer_size; | |
0e8014d7 | 383 | if (hw_base >= runtime->boundary) { |
f240406b | 384 | hw_base = 0; |
0e8014d7 PLB |
385 | crossed_boundary++; |
386 | } | |
f240406b JK |
387 | new_hw_ptr = hw_base + pos; |
388 | } | |
389 | __delta: | |
b406e610 CL |
390 | delta = new_hw_ptr - old_hw_ptr; |
391 | if (delta < 0) | |
392 | delta += runtime->boundary; | |
f240406b JK |
393 | if (xrun_debug(substream, in_interrupt ? |
394 | XRUN_DEBUG_PERIODUPDATE : XRUN_DEBUG_HWPTRUPDATE)) { | |
395 | char name[16]; | |
acb03d44 | 396 | snd_pcm_debug_name(substream, name, sizeof(name)); |
f240406b JK |
397 | snd_printd("%s_update: %s: pos=%u/%u/%u, " |
398 | "hwptr=%ld/%ld/%ld/%ld\n", | |
399 | in_interrupt ? "period" : "hwptr", | |
400 | name, | |
401 | (unsigned int)pos, | |
402 | (unsigned int)runtime->period_size, | |
403 | (unsigned int)runtime->buffer_size, | |
404 | (unsigned long)delta, | |
405 | (unsigned long)old_hw_ptr, | |
406 | (unsigned long)new_hw_ptr, | |
407 | (unsigned long)runtime->hw_ptr_base); | |
408 | } | |
ab69a490 | 409 | |
59ff878f | 410 | if (runtime->no_period_wakeup) { |
12ff414e | 411 | snd_pcm_sframes_t xrun_threshold; |
59ff878f CL |
412 | /* |
413 | * Without regular period interrupts, we have to check | |
414 | * the elapsed time to detect xruns. | |
415 | */ | |
3509a03f | 416 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
47228e48 CL |
417 | if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) |
418 | goto no_delta_check; | |
59ff878f | 419 | hdelta = jdelta - delta * HZ / runtime->rate; |
12ff414e KA |
420 | xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; |
421 | while (hdelta > xrun_threshold) { | |
59ff878f CL |
422 | delta += runtime->buffer_size; |
423 | hw_base += runtime->buffer_size; | |
0e8014d7 | 424 | if (hw_base >= runtime->boundary) { |
59ff878f | 425 | hw_base = 0; |
0e8014d7 PLB |
426 | crossed_boundary++; |
427 | } | |
59ff878f CL |
428 | new_hw_ptr = hw_base + pos; |
429 | hdelta -= runtime->hw_ptr_buffer_jiffies; | |
430 | } | |
ab69a490 | 431 | goto no_delta_check; |
59ff878f | 432 | } |
ab69a490 | 433 | |
f240406b | 434 | /* something must be really wrong */ |
7b3a177b | 435 | if (delta >= runtime->buffer_size + runtime->period_size) { |
f240406b JK |
436 | hw_ptr_error(substream, |
437 | "Unexpected hw_pointer value %s" | |
438 | "(stream=%i, pos=%ld, new_hw_ptr=%ld, " | |
439 | "old_hw_ptr=%ld)\n", | |
440 | in_interrupt ? "[Q] " : "[P]", | |
441 | substream->stream, (long)pos, | |
442 | (long)new_hw_ptr, (long)old_hw_ptr); | |
443 | return 0; | |
444 | } | |
c87d9732 TI |
445 | |
446 | /* Do jiffies check only in xrun_debug mode */ | |
741b20cf | 447 | if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) |
c87d9732 TI |
448 | goto no_jiffies_check; |
449 | ||
3e5b5016 TI |
450 | /* Skip the jiffies check for hardwares with BATCH flag. |
451 | * Such hardware usually just increases the position at each IRQ, | |
452 | * thus it can't give any strange position. | |
453 | */ | |
454 | if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) | |
455 | goto no_jiffies_check; | |
f240406b | 456 | hdelta = delta; |
a4444da3 JK |
457 | if (hdelta < runtime->delay) |
458 | goto no_jiffies_check; | |
459 | hdelta -= runtime->delay; | |
3509a03f | 460 | jdelta = curr_jiffies - runtime->hw_ptr_jiffies; |
bbf6ad13 JK |
461 | if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { |
462 | delta = jdelta / | |
463 | (((runtime->period_size * HZ) / runtime->rate) | |
464 | + HZ/100); | |
f240406b JK |
465 | /* move new_hw_ptr according jiffies not pos variable */ |
466 | new_hw_ptr = old_hw_ptr; | |
ed69c6a8 | 467 | hw_base = delta; |
f240406b JK |
468 | /* use loop to avoid checks for delta overflows */ |
469 | /* the delta value is small or zero in most cases */ | |
470 | while (delta > 0) { | |
471 | new_hw_ptr += runtime->period_size; | |
0e8014d7 | 472 | if (new_hw_ptr >= runtime->boundary) { |
f240406b | 473 | new_hw_ptr -= runtime->boundary; |
0e8014d7 PLB |
474 | crossed_boundary--; |
475 | } | |
f240406b JK |
476 | delta--; |
477 | } | |
478 | /* align hw_base to buffer_size */ | |
bbf6ad13 | 479 | hw_ptr_error(substream, |
f240406b | 480 | "hw_ptr skipping! %s" |
bbf6ad13 | 481 | "(pos=%ld, delta=%ld, period=%ld, " |
f240406b JK |
482 | "jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", |
483 | in_interrupt ? "[Q] " : "", | |
bbf6ad13 JK |
484 | (long)pos, (long)hdelta, |
485 | (long)runtime->period_size, jdelta, | |
ed69c6a8 | 486 | ((hdelta * HZ) / runtime->rate), hw_base, |
f240406b JK |
487 | (unsigned long)old_hw_ptr, |
488 | (unsigned long)new_hw_ptr); | |
ed69c6a8 JK |
489 | /* reset values to proper state */ |
490 | delta = 0; | |
491 | hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); | |
bbf6ad13 | 492 | } |
3e5b5016 | 493 | no_jiffies_check: |
bbf6ad13 | 494 | if (delta > runtime->period_size + runtime->period_size / 2) { |
ed3da3d9 | 495 | hw_ptr_error(substream, |
f240406b JK |
496 | "Lost interrupts? %s" |
497 | "(stream=%i, delta=%ld, new_hw_ptr=%ld, " | |
498 | "old_hw_ptr=%ld)\n", | |
499 | in_interrupt ? "[Q] " : "", | |
ed3da3d9 | 500 | substream->stream, (long)delta, |
f240406b JK |
501 | (long)new_hw_ptr, |
502 | (long)old_hw_ptr); | |
ed3da3d9 | 503 | } |
f240406b | 504 | |
ab69a490 | 505 | no_delta_check: |
f240406b JK |
506 | if (runtime->status->hw_ptr == new_hw_ptr) |
507 | return 0; | |
ab1863fc | 508 | |
1da177e4 LT |
509 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && |
510 | runtime->silence_size > 0) | |
511 | snd_pcm_playback_silence(substream, new_hw_ptr); | |
512 | ||
e7636925 | 513 | if (in_interrupt) { |
ead4046b CL |
514 | delta = new_hw_ptr - runtime->hw_ptr_interrupt; |
515 | if (delta < 0) | |
516 | delta += runtime->boundary; | |
517 | delta -= (snd_pcm_uframes_t)delta % runtime->period_size; | |
518 | runtime->hw_ptr_interrupt += delta; | |
519 | if (runtime->hw_ptr_interrupt >= runtime->boundary) | |
520 | runtime->hw_ptr_interrupt -= runtime->boundary; | |
e7636925 | 521 | } |
ed3da3d9 | 522 | runtime->hw_ptr_base = hw_base; |
1da177e4 | 523 | runtime->status->hw_ptr = new_hw_ptr; |
3509a03f | 524 | runtime->hw_ptr_jiffies = curr_jiffies; |
0e8014d7 PLB |
525 | if (crossed_boundary) { |
526 | snd_BUG_ON(crossed_boundary != 1); | |
527 | runtime->hw_ptr_wrap += runtime->boundary; | |
528 | } | |
4eeaaeae | 529 | if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { |
3509a03f | 530 | runtime->status->tstamp = curr_tstamp; |
1da177e4 | 531 | |
4eeaaeae PLB |
532 | if (!(runtime->hw.info & SNDRV_PCM_INFO_HAS_WALL_CLOCK)) { |
533 | /* | |
534 | * no wall clock available, provide audio timestamp | |
535 | * derived from pointer position+delay | |
536 | */ | |
537 | u64 audio_frames, audio_nsecs; | |
538 | ||
539 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
540 | audio_frames = runtime->hw_ptr_wrap | |
541 | + runtime->status->hw_ptr | |
542 | - runtime->delay; | |
543 | else | |
544 | audio_frames = runtime->hw_ptr_wrap | |
545 | + runtime->status->hw_ptr | |
546 | + runtime->delay; | |
547 | audio_nsecs = div_u64(audio_frames * 1000000000LL, | |
548 | runtime->rate); | |
549 | audio_tstamp = ns_to_timespec(audio_nsecs); | |
550 | } | |
551 | runtime->status->audio_tstamp = audio_tstamp; | |
552 | } | |
553 | ||
1250932e | 554 | return snd_pcm_update_state(substream, runtime); |
1da177e4 LT |
555 | } |
556 | ||
557 | /* CAUTION: call it with irq disabled */ | |
877211f5 | 558 | int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) |
1da177e4 | 559 | { |
f240406b | 560 | return snd_pcm_update_hw_ptr0(substream, 0); |
1da177e4 LT |
561 | } |
562 | ||
563 | /** | |
564 | * snd_pcm_set_ops - set the PCM operators | |
565 | * @pcm: the pcm instance | |
566 | * @direction: stream direction, SNDRV_PCM_STREAM_XXX | |
567 | * @ops: the operator table | |
568 | * | |
569 | * Sets the given PCM operators to the pcm instance. | |
570 | */ | |
e6c2e7eb LPC |
571 | void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, |
572 | const struct snd_pcm_ops *ops) | |
1da177e4 | 573 | { |
877211f5 TI |
574 | struct snd_pcm_str *stream = &pcm->streams[direction]; |
575 | struct snd_pcm_substream *substream; | |
1da177e4 LT |
576 | |
577 | for (substream = stream->substream; substream != NULL; substream = substream->next) | |
578 | substream->ops = ops; | |
579 | } | |
580 | ||
e88e8ae6 | 581 | EXPORT_SYMBOL(snd_pcm_set_ops); |
1da177e4 LT |
582 | |
583 | /** | |
584 | * snd_pcm_sync - set the PCM sync id | |
585 | * @substream: the pcm substream | |
586 | * | |
587 | * Sets the PCM sync identifier for the card. | |
588 | */ | |
877211f5 | 589 | void snd_pcm_set_sync(struct snd_pcm_substream *substream) |
1da177e4 | 590 | { |
877211f5 | 591 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
592 | |
593 | runtime->sync.id32[0] = substream->pcm->card->number; | |
594 | runtime->sync.id32[1] = -1; | |
595 | runtime->sync.id32[2] = -1; | |
596 | runtime->sync.id32[3] = -1; | |
597 | } | |
598 | ||
e88e8ae6 TI |
599 | EXPORT_SYMBOL(snd_pcm_set_sync); |
600 | ||
1da177e4 LT |
601 | /* |
602 | * Standard ioctl routine | |
603 | */ | |
604 | ||
1da177e4 LT |
605 | static inline unsigned int div32(unsigned int a, unsigned int b, |
606 | unsigned int *r) | |
607 | { | |
608 | if (b == 0) { | |
609 | *r = 0; | |
610 | return UINT_MAX; | |
611 | } | |
612 | *r = a % b; | |
613 | return a / b; | |
614 | } | |
615 | ||
616 | static inline unsigned int div_down(unsigned int a, unsigned int b) | |
617 | { | |
618 | if (b == 0) | |
619 | return UINT_MAX; | |
620 | return a / b; | |
621 | } | |
622 | ||
623 | static inline unsigned int div_up(unsigned int a, unsigned int b) | |
624 | { | |
625 | unsigned int r; | |
626 | unsigned int q; | |
627 | if (b == 0) | |
628 | return UINT_MAX; | |
629 | q = div32(a, b, &r); | |
630 | if (r) | |
631 | ++q; | |
632 | return q; | |
633 | } | |
634 | ||
635 | static inline unsigned int mul(unsigned int a, unsigned int b) | |
636 | { | |
637 | if (a == 0) | |
638 | return 0; | |
639 | if (div_down(UINT_MAX, a) < b) | |
640 | return UINT_MAX; | |
641 | return a * b; | |
642 | } | |
643 | ||
644 | static inline unsigned int muldiv32(unsigned int a, unsigned int b, | |
645 | unsigned int c, unsigned int *r) | |
646 | { | |
647 | u_int64_t n = (u_int64_t) a * b; | |
648 | if (c == 0) { | |
7eaa943c | 649 | snd_BUG_ON(!n); |
1da177e4 LT |
650 | *r = 0; |
651 | return UINT_MAX; | |
652 | } | |
3f7440a6 | 653 | n = div_u64_rem(n, c, r); |
1da177e4 LT |
654 | if (n >= UINT_MAX) { |
655 | *r = 0; | |
656 | return UINT_MAX; | |
657 | } | |
658 | return n; | |
659 | } | |
660 | ||
1da177e4 LT |
661 | /** |
662 | * snd_interval_refine - refine the interval value of configurator | |
663 | * @i: the interval value to refine | |
664 | * @v: the interval value to refer to | |
665 | * | |
666 | * Refines the interval value with the reference value. | |
667 | * The interval is changed to the range satisfying both intervals. | |
668 | * The interval status (min, max, integer, etc.) are evaluated. | |
669 | * | |
eb7c06e8 YB |
670 | * Return: Positive if the value is changed, zero if it's not changed, or a |
671 | * negative error code. | |
1da177e4 | 672 | */ |
877211f5 | 673 | int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) |
1da177e4 LT |
674 | { |
675 | int changed = 0; | |
7eaa943c TI |
676 | if (snd_BUG_ON(snd_interval_empty(i))) |
677 | return -EINVAL; | |
1da177e4 LT |
678 | if (i->min < v->min) { |
679 | i->min = v->min; | |
680 | i->openmin = v->openmin; | |
681 | changed = 1; | |
682 | } else if (i->min == v->min && !i->openmin && v->openmin) { | |
683 | i->openmin = 1; | |
684 | changed = 1; | |
685 | } | |
686 | if (i->max > v->max) { | |
687 | i->max = v->max; | |
688 | i->openmax = v->openmax; | |
689 | changed = 1; | |
690 | } else if (i->max == v->max && !i->openmax && v->openmax) { | |
691 | i->openmax = 1; | |
692 | changed = 1; | |
693 | } | |
694 | if (!i->integer && v->integer) { | |
695 | i->integer = 1; | |
696 | changed = 1; | |
697 | } | |
698 | if (i->integer) { | |
699 | if (i->openmin) { | |
700 | i->min++; | |
701 | i->openmin = 0; | |
702 | } | |
703 | if (i->openmax) { | |
704 | i->max--; | |
705 | i->openmax = 0; | |
706 | } | |
707 | } else if (!i->openmin && !i->openmax && i->min == i->max) | |
708 | i->integer = 1; | |
709 | if (snd_interval_checkempty(i)) { | |
710 | snd_interval_none(i); | |
711 | return -EINVAL; | |
712 | } | |
713 | return changed; | |
714 | } | |
715 | ||
e88e8ae6 TI |
716 | EXPORT_SYMBOL(snd_interval_refine); |
717 | ||
877211f5 | 718 | static int snd_interval_refine_first(struct snd_interval *i) |
1da177e4 | 719 | { |
7eaa943c TI |
720 | if (snd_BUG_ON(snd_interval_empty(i))) |
721 | return -EINVAL; | |
1da177e4 LT |
722 | if (snd_interval_single(i)) |
723 | return 0; | |
724 | i->max = i->min; | |
725 | i->openmax = i->openmin; | |
726 | if (i->openmax) | |
727 | i->max++; | |
728 | return 1; | |
729 | } | |
730 | ||
877211f5 | 731 | static int snd_interval_refine_last(struct snd_interval *i) |
1da177e4 | 732 | { |
7eaa943c TI |
733 | if (snd_BUG_ON(snd_interval_empty(i))) |
734 | return -EINVAL; | |
1da177e4 LT |
735 | if (snd_interval_single(i)) |
736 | return 0; | |
737 | i->min = i->max; | |
738 | i->openmin = i->openmax; | |
739 | if (i->openmin) | |
740 | i->min--; | |
741 | return 1; | |
742 | } | |
743 | ||
877211f5 | 744 | void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
745 | { |
746 | if (a->empty || b->empty) { | |
747 | snd_interval_none(c); | |
748 | return; | |
749 | } | |
750 | c->empty = 0; | |
751 | c->min = mul(a->min, b->min); | |
752 | c->openmin = (a->openmin || b->openmin); | |
753 | c->max = mul(a->max, b->max); | |
754 | c->openmax = (a->openmax || b->openmax); | |
755 | c->integer = (a->integer && b->integer); | |
756 | } | |
757 | ||
758 | /** | |
759 | * snd_interval_div - refine the interval value with division | |
df8db936 TI |
760 | * @a: dividend |
761 | * @b: divisor | |
762 | * @c: quotient | |
1da177e4 LT |
763 | * |
764 | * c = a / b | |
765 | * | |
766 | * Returns non-zero if the value is changed, zero if not changed. | |
767 | */ | |
877211f5 | 768 | void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) |
1da177e4 LT |
769 | { |
770 | unsigned int r; | |
771 | if (a->empty || b->empty) { | |
772 | snd_interval_none(c); | |
773 | return; | |
774 | } | |
775 | c->empty = 0; | |
776 | c->min = div32(a->min, b->max, &r); | |
777 | c->openmin = (r || a->openmin || b->openmax); | |
778 | if (b->min > 0) { | |
779 | c->max = div32(a->max, b->min, &r); | |
780 | if (r) { | |
781 | c->max++; | |
782 | c->openmax = 1; | |
783 | } else | |
784 | c->openmax = (a->openmax || b->openmin); | |
785 | } else { | |
786 | c->max = UINT_MAX; | |
787 | c->openmax = 0; | |
788 | } | |
789 | c->integer = 0; | |
790 | } | |
791 | ||
792 | /** | |
793 | * snd_interval_muldivk - refine the interval value | |
df8db936 TI |
794 | * @a: dividend 1 |
795 | * @b: dividend 2 | |
796 | * @k: divisor (as integer) | |
797 | * @c: result | |
798 | * | |
1da177e4 LT |
799 | * c = a * b / k |
800 | * | |
801 | * Returns non-zero if the value is changed, zero if not changed. | |
802 | */ | |
877211f5 TI |
803 | void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, |
804 | unsigned int k, struct snd_interval *c) | |
1da177e4 LT |
805 | { |
806 | unsigned int r; | |
807 | if (a->empty || b->empty) { | |
808 | snd_interval_none(c); | |
809 | return; | |
810 | } | |
811 | c->empty = 0; | |
812 | c->min = muldiv32(a->min, b->min, k, &r); | |
813 | c->openmin = (r || a->openmin || b->openmin); | |
814 | c->max = muldiv32(a->max, b->max, k, &r); | |
815 | if (r) { | |
816 | c->max++; | |
817 | c->openmax = 1; | |
818 | } else | |
819 | c->openmax = (a->openmax || b->openmax); | |
820 | c->integer = 0; | |
821 | } | |
822 | ||
823 | /** | |
824 | * snd_interval_mulkdiv - refine the interval value | |
df8db936 TI |
825 | * @a: dividend 1 |
826 | * @k: dividend 2 (as integer) | |
827 | * @b: divisor | |
828 | * @c: result | |
1da177e4 LT |
829 | * |
830 | * c = a * k / b | |
831 | * | |
832 | * Returns non-zero if the value is changed, zero if not changed. | |
833 | */ | |
877211f5 TI |
834 | void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, |
835 | const struct snd_interval *b, struct snd_interval *c) | |
1da177e4 LT |
836 | { |
837 | unsigned int r; | |
838 | if (a->empty || b->empty) { | |
839 | snd_interval_none(c); | |
840 | return; | |
841 | } | |
842 | c->empty = 0; | |
843 | c->min = muldiv32(a->min, k, b->max, &r); | |
844 | c->openmin = (r || a->openmin || b->openmax); | |
845 | if (b->min > 0) { | |
846 | c->max = muldiv32(a->max, k, b->min, &r); | |
847 | if (r) { | |
848 | c->max++; | |
849 | c->openmax = 1; | |
850 | } else | |
851 | c->openmax = (a->openmax || b->openmin); | |
852 | } else { | |
853 | c->max = UINT_MAX; | |
854 | c->openmax = 0; | |
855 | } | |
856 | c->integer = 0; | |
857 | } | |
858 | ||
1da177e4 LT |
859 | /* ---- */ |
860 | ||
861 | ||
862 | /** | |
863 | * snd_interval_ratnum - refine the interval value | |
df8db936 TI |
864 | * @i: interval to refine |
865 | * @rats_count: number of ratnum_t | |
866 | * @rats: ratnum_t array | |
867 | * @nump: pointer to store the resultant numerator | |
868 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 869 | * |
eb7c06e8 YB |
870 | * Return: Positive if the value is changed, zero if it's not changed, or a |
871 | * negative error code. | |
1da177e4 | 872 | */ |
877211f5 TI |
873 | int snd_interval_ratnum(struct snd_interval *i, |
874 | unsigned int rats_count, struct snd_ratnum *rats, | |
875 | unsigned int *nump, unsigned int *denp) | |
1da177e4 | 876 | { |
8374e24c KH |
877 | unsigned int best_num, best_den; |
878 | int best_diff; | |
1da177e4 | 879 | unsigned int k; |
877211f5 | 880 | struct snd_interval t; |
1da177e4 | 881 | int err; |
8374e24c KH |
882 | unsigned int result_num, result_den; |
883 | int result_diff; | |
1da177e4 LT |
884 | |
885 | best_num = best_den = best_diff = 0; | |
886 | for (k = 0; k < rats_count; ++k) { | |
887 | unsigned int num = rats[k].num; | |
888 | unsigned int den; | |
889 | unsigned int q = i->min; | |
890 | int diff; | |
891 | if (q == 0) | |
892 | q = 1; | |
40962d7c | 893 | den = div_up(num, q); |
1da177e4 LT |
894 | if (den < rats[k].den_min) |
895 | continue; | |
896 | if (den > rats[k].den_max) | |
897 | den = rats[k].den_max; | |
898 | else { | |
899 | unsigned int r; | |
900 | r = (den - rats[k].den_min) % rats[k].den_step; | |
901 | if (r != 0) | |
902 | den -= r; | |
903 | } | |
904 | diff = num - q * den; | |
8374e24c KH |
905 | if (diff < 0) |
906 | diff = -diff; | |
1da177e4 LT |
907 | if (best_num == 0 || |
908 | diff * best_den < best_diff * den) { | |
909 | best_diff = diff; | |
910 | best_den = den; | |
911 | best_num = num; | |
912 | } | |
913 | } | |
914 | if (best_den == 0) { | |
915 | i->empty = 1; | |
916 | return -EINVAL; | |
917 | } | |
918 | t.min = div_down(best_num, best_den); | |
919 | t.openmin = !!(best_num % best_den); | |
920 | ||
8374e24c KH |
921 | result_num = best_num; |
922 | result_diff = best_diff; | |
923 | result_den = best_den; | |
1da177e4 LT |
924 | best_num = best_den = best_diff = 0; |
925 | for (k = 0; k < rats_count; ++k) { | |
926 | unsigned int num = rats[k].num; | |
927 | unsigned int den; | |
928 | unsigned int q = i->max; | |
929 | int diff; | |
930 | if (q == 0) { | |
931 | i->empty = 1; | |
932 | return -EINVAL; | |
933 | } | |
40962d7c | 934 | den = div_down(num, q); |
1da177e4 LT |
935 | if (den > rats[k].den_max) |
936 | continue; | |
937 | if (den < rats[k].den_min) | |
938 | den = rats[k].den_min; | |
939 | else { | |
940 | unsigned int r; | |
941 | r = (den - rats[k].den_min) % rats[k].den_step; | |
942 | if (r != 0) | |
943 | den += rats[k].den_step - r; | |
944 | } | |
945 | diff = q * den - num; | |
8374e24c KH |
946 | if (diff < 0) |
947 | diff = -diff; | |
1da177e4 LT |
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.max = div_up(best_num, best_den); | |
960 | t.openmax = !!(best_num % best_den); | |
961 | t.integer = 0; | |
962 | err = snd_interval_refine(i, &t); | |
963 | if (err < 0) | |
964 | return err; | |
965 | ||
966 | if (snd_interval_single(i)) { | |
8374e24c KH |
967 | if (best_diff * result_den < result_diff * best_den) { |
968 | result_num = best_num; | |
969 | result_den = best_den; | |
970 | } | |
1da177e4 | 971 | if (nump) |
8374e24c | 972 | *nump = result_num; |
1da177e4 | 973 | if (denp) |
8374e24c | 974 | *denp = result_den; |
1da177e4 LT |
975 | } |
976 | return err; | |
977 | } | |
978 | ||
e88e8ae6 TI |
979 | EXPORT_SYMBOL(snd_interval_ratnum); |
980 | ||
1da177e4 LT |
981 | /** |
982 | * snd_interval_ratden - refine the interval value | |
df8db936 | 983 | * @i: interval to refine |
877211f5 TI |
984 | * @rats_count: number of struct ratden |
985 | * @rats: struct ratden array | |
df8db936 TI |
986 | * @nump: pointer to store the resultant numerator |
987 | * @denp: pointer to store the resultant denominator | |
1da177e4 | 988 | * |
eb7c06e8 YB |
989 | * Return: Positive if the value is changed, zero if it's not changed, or a |
990 | * negative error code. | |
1da177e4 | 991 | */ |
877211f5 TI |
992 | static int snd_interval_ratden(struct snd_interval *i, |
993 | unsigned int rats_count, struct snd_ratden *rats, | |
1da177e4 LT |
994 | unsigned int *nump, unsigned int *denp) |
995 | { | |
996 | unsigned int best_num, best_diff, best_den; | |
997 | unsigned int k; | |
877211f5 | 998 | struct snd_interval t; |
1da177e4 LT |
999 | int err; |
1000 | ||
1001 | best_num = best_den = best_diff = 0; | |
1002 | for (k = 0; k < rats_count; ++k) { | |
1003 | unsigned int num; | |
1004 | unsigned int den = rats[k].den; | |
1005 | unsigned int q = i->min; | |
1006 | int diff; | |
1007 | num = mul(q, den); | |
1008 | if (num > rats[k].num_max) | |
1009 | continue; | |
1010 | if (num < rats[k].num_min) | |
1011 | num = rats[k].num_max; | |
1012 | else { | |
1013 | unsigned int r; | |
1014 | r = (num - rats[k].num_min) % rats[k].num_step; | |
1015 | if (r != 0) | |
1016 | num += rats[k].num_step - r; | |
1017 | } | |
1018 | diff = num - q * den; | |
1019 | if (best_num == 0 || | |
1020 | diff * best_den < best_diff * den) { | |
1021 | best_diff = diff; | |
1022 | best_den = den; | |
1023 | best_num = num; | |
1024 | } | |
1025 | } | |
1026 | if (best_den == 0) { | |
1027 | i->empty = 1; | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | t.min = div_down(best_num, best_den); | |
1031 | t.openmin = !!(best_num % best_den); | |
1032 | ||
1033 | best_num = best_den = best_diff = 0; | |
1034 | for (k = 0; k < rats_count; ++k) { | |
1035 | unsigned int num; | |
1036 | unsigned int den = rats[k].den; | |
1037 | unsigned int q = i->max; | |
1038 | int diff; | |
1039 | num = mul(q, den); | |
1040 | if (num < rats[k].num_min) | |
1041 | continue; | |
1042 | if (num > rats[k].num_max) | |
1043 | num = rats[k].num_max; | |
1044 | else { | |
1045 | unsigned int r; | |
1046 | r = (num - rats[k].num_min) % rats[k].num_step; | |
1047 | if (r != 0) | |
1048 | num -= r; | |
1049 | } | |
1050 | diff = q * den - num; | |
1051 | if (best_num == 0 || | |
1052 | diff * best_den < best_diff * den) { | |
1053 | best_diff = diff; | |
1054 | best_den = den; | |
1055 | best_num = num; | |
1056 | } | |
1057 | } | |
1058 | if (best_den == 0) { | |
1059 | i->empty = 1; | |
1060 | return -EINVAL; | |
1061 | } | |
1062 | t.max = div_up(best_num, best_den); | |
1063 | t.openmax = !!(best_num % best_den); | |
1064 | t.integer = 0; | |
1065 | err = snd_interval_refine(i, &t); | |
1066 | if (err < 0) | |
1067 | return err; | |
1068 | ||
1069 | if (snd_interval_single(i)) { | |
1070 | if (nump) | |
1071 | *nump = best_num; | |
1072 | if (denp) | |
1073 | *denp = best_den; | |
1074 | } | |
1075 | return err; | |
1076 | } | |
1077 | ||
1078 | /** | |
1079 | * snd_interval_list - refine the interval value from the list | |
1080 | * @i: the interval value to refine | |
1081 | * @count: the number of elements in the list | |
1082 | * @list: the value list | |
1083 | * @mask: the bit-mask to evaluate | |
1084 | * | |
1085 | * Refines the interval value from the list. | |
1086 | * When mask is non-zero, only the elements corresponding to bit 1 are | |
1087 | * evaluated. | |
1088 | * | |
eb7c06e8 YB |
1089 | * Return: Positive if the value is changed, zero if it's not changed, or a |
1090 | * negative error code. | |
1da177e4 | 1091 | */ |
4af87a93 MB |
1092 | int snd_interval_list(struct snd_interval *i, unsigned int count, |
1093 | const unsigned int *list, unsigned int mask) | |
1da177e4 LT |
1094 | { |
1095 | unsigned int k; | |
b1ddaf68 | 1096 | struct snd_interval list_range; |
0981a260 TI |
1097 | |
1098 | if (!count) { | |
1099 | i->empty = 1; | |
1100 | return -EINVAL; | |
1101 | } | |
b1ddaf68 CL |
1102 | snd_interval_any(&list_range); |
1103 | list_range.min = UINT_MAX; | |
1104 | list_range.max = 0; | |
1da177e4 LT |
1105 | for (k = 0; k < count; k++) { |
1106 | if (mask && !(mask & (1 << k))) | |
1107 | continue; | |
b1ddaf68 | 1108 | if (!snd_interval_test(i, list[k])) |
1da177e4 | 1109 | continue; |
b1ddaf68 CL |
1110 | list_range.min = min(list_range.min, list[k]); |
1111 | list_range.max = max(list_range.max, list[k]); | |
1da177e4 | 1112 | } |
b1ddaf68 | 1113 | return snd_interval_refine(i, &list_range); |
1da177e4 LT |
1114 | } |
1115 | ||
e88e8ae6 TI |
1116 | EXPORT_SYMBOL(snd_interval_list); |
1117 | ||
877211f5 | 1118 | static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step) |
1da177e4 LT |
1119 | { |
1120 | unsigned int n; | |
1121 | int changed = 0; | |
1122 | n = (i->min - min) % step; | |
1123 | if (n != 0 || i->openmin) { | |
1124 | i->min += step - n; | |
1125 | changed = 1; | |
1126 | } | |
1127 | n = (i->max - min) % step; | |
1128 | if (n != 0 || i->openmax) { | |
1129 | i->max -= n; | |
1130 | changed = 1; | |
1131 | } | |
1132 | if (snd_interval_checkempty(i)) { | |
1133 | i->empty = 1; | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | return changed; | |
1137 | } | |
1138 | ||
1139 | /* Info constraints helpers */ | |
1140 | ||
1141 | /** | |
1142 | * snd_pcm_hw_rule_add - add the hw-constraint rule | |
1143 | * @runtime: the pcm runtime instance | |
1144 | * @cond: condition bits | |
1145 | * @var: the variable to evaluate | |
1146 | * @func: the evaluation function | |
1147 | * @private: the private data pointer passed to function | |
1148 | * @dep: the dependent variables | |
1149 | * | |
eb7c06e8 | 1150 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1151 | */ |
877211f5 | 1152 | int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, |
1da177e4 LT |
1153 | int var, |
1154 | snd_pcm_hw_rule_func_t func, void *private, | |
1155 | int dep, ...) | |
1156 | { | |
877211f5 TI |
1157 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1158 | struct snd_pcm_hw_rule *c; | |
1da177e4 LT |
1159 | unsigned int k; |
1160 | va_list args; | |
1161 | va_start(args, dep); | |
1162 | if (constrs->rules_num >= constrs->rules_all) { | |
877211f5 | 1163 | struct snd_pcm_hw_rule *new; |
1da177e4 LT |
1164 | unsigned int new_rules = constrs->rules_all + 16; |
1165 | new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); | |
87a1c8aa JJ |
1166 | if (!new) { |
1167 | va_end(args); | |
1da177e4 | 1168 | return -ENOMEM; |
87a1c8aa | 1169 | } |
1da177e4 LT |
1170 | if (constrs->rules) { |
1171 | memcpy(new, constrs->rules, | |
1172 | constrs->rules_num * sizeof(*c)); | |
1173 | kfree(constrs->rules); | |
1174 | } | |
1175 | constrs->rules = new; | |
1176 | constrs->rules_all = new_rules; | |
1177 | } | |
1178 | c = &constrs->rules[constrs->rules_num]; | |
1179 | c->cond = cond; | |
1180 | c->func = func; | |
1181 | c->var = var; | |
1182 | c->private = private; | |
1183 | k = 0; | |
1184 | while (1) { | |
87a1c8aa JJ |
1185 | if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { |
1186 | va_end(args); | |
7eaa943c | 1187 | return -EINVAL; |
87a1c8aa | 1188 | } |
1da177e4 LT |
1189 | c->deps[k++] = dep; |
1190 | if (dep < 0) | |
1191 | break; | |
1192 | dep = va_arg(args, int); | |
1193 | } | |
1194 | constrs->rules_num++; | |
1195 | va_end(args); | |
1196 | return 0; | |
87a1c8aa | 1197 | } |
1da177e4 | 1198 | |
e88e8ae6 TI |
1199 | EXPORT_SYMBOL(snd_pcm_hw_rule_add); |
1200 | ||
1da177e4 | 1201 | /** |
1c85cc64 | 1202 | * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint |
df8db936 TI |
1203 | * @runtime: PCM runtime instance |
1204 | * @var: hw_params variable to apply the mask | |
1205 | * @mask: the bitmap mask | |
1206 | * | |
1c85cc64 | 1207 | * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. |
eb7c06e8 YB |
1208 | * |
1209 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1210 | */ |
877211f5 | 1211 | int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1212 | u_int32_t mask) |
1213 | { | |
877211f5 TI |
1214 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1215 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1216 | *maskp->bits &= mask; |
1217 | memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ | |
1218 | if (*maskp->bits == 0) | |
1219 | return -EINVAL; | |
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | /** | |
1c85cc64 | 1224 | * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint |
df8db936 TI |
1225 | * @runtime: PCM runtime instance |
1226 | * @var: hw_params variable to apply the mask | |
1227 | * @mask: the 64bit bitmap mask | |
1228 | * | |
1c85cc64 | 1229 | * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. |
eb7c06e8 YB |
1230 | * |
1231 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1232 | */ |
877211f5 | 1233 | int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1234 | u_int64_t mask) |
1235 | { | |
877211f5 TI |
1236 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1237 | struct snd_mask *maskp = constrs_mask(constrs, var); | |
1da177e4 LT |
1238 | maskp->bits[0] &= (u_int32_t)mask; |
1239 | maskp->bits[1] &= (u_int32_t)(mask >> 32); | |
1240 | memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ | |
1241 | if (! maskp->bits[0] && ! maskp->bits[1]) | |
1242 | return -EINVAL; | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /** | |
1c85cc64 | 1247 | * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval |
df8db936 TI |
1248 | * @runtime: PCM runtime instance |
1249 | * @var: hw_params variable to apply the integer constraint | |
1250 | * | |
1251 | * Apply the constraint of integer to an interval parameter. | |
eb7c06e8 YB |
1252 | * |
1253 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1254 | * negative error code. | |
1da177e4 | 1255 | */ |
877211f5 | 1256 | int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) |
1da177e4 | 1257 | { |
877211f5 | 1258 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1da177e4 LT |
1259 | return snd_interval_setinteger(constrs_interval(constrs, var)); |
1260 | } | |
1261 | ||
e88e8ae6 TI |
1262 | EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); |
1263 | ||
1da177e4 | 1264 | /** |
1c85cc64 | 1265 | * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval |
df8db936 TI |
1266 | * @runtime: PCM runtime instance |
1267 | * @var: hw_params variable to apply the range | |
1268 | * @min: the minimal value | |
1269 | * @max: the maximal value | |
1270 | * | |
1271 | * Apply the min/max range constraint to an interval parameter. | |
eb7c06e8 YB |
1272 | * |
1273 | * Return: Positive if the value is changed, zero if it's not changed, or a | |
1274 | * negative error code. | |
1da177e4 | 1275 | */ |
877211f5 | 1276 | int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, |
1da177e4 LT |
1277 | unsigned int min, unsigned int max) |
1278 | { | |
877211f5 TI |
1279 | struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; |
1280 | struct snd_interval t; | |
1da177e4 LT |
1281 | t.min = min; |
1282 | t.max = max; | |
1283 | t.openmin = t.openmax = 0; | |
1284 | t.integer = 0; | |
1285 | return snd_interval_refine(constrs_interval(constrs, var), &t); | |
1286 | } | |
1287 | ||
e88e8ae6 TI |
1288 | EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); |
1289 | ||
877211f5 TI |
1290 | static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, |
1291 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1292 | { |
877211f5 | 1293 | struct snd_pcm_hw_constraint_list *list = rule->private; |
1da177e4 LT |
1294 | return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); |
1295 | } | |
1296 | ||
1297 | ||
1298 | /** | |
1c85cc64 | 1299 | * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter |
df8db936 TI |
1300 | * @runtime: PCM runtime instance |
1301 | * @cond: condition bits | |
1302 | * @var: hw_params variable to apply the list constraint | |
1303 | * @l: list | |
1304 | * | |
1305 | * Apply the list of constraints to an interval parameter. | |
eb7c06e8 YB |
1306 | * |
1307 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1308 | */ |
877211f5 | 1309 | int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1310 | unsigned int cond, |
1311 | snd_pcm_hw_param_t var, | |
1464189f | 1312 | const struct snd_pcm_hw_constraint_list *l) |
1da177e4 LT |
1313 | { |
1314 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1464189f | 1315 | snd_pcm_hw_rule_list, (void *)l, |
1da177e4 LT |
1316 | var, -1); |
1317 | } | |
1318 | ||
e88e8ae6 TI |
1319 | EXPORT_SYMBOL(snd_pcm_hw_constraint_list); |
1320 | ||
877211f5 TI |
1321 | static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, |
1322 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1323 | { |
877211f5 | 1324 | struct snd_pcm_hw_constraint_ratnums *r = rule->private; |
1da177e4 LT |
1325 | unsigned int num = 0, den = 0; |
1326 | int err; | |
1327 | err = snd_interval_ratnum(hw_param_interval(params, rule->var), | |
1328 | r->nrats, r->rats, &num, &den); | |
1329 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1330 | params->rate_num = num; | |
1331 | params->rate_den = den; | |
1332 | } | |
1333 | return err; | |
1334 | } | |
1335 | ||
1336 | /** | |
1c85cc64 | 1337 | * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter |
df8db936 TI |
1338 | * @runtime: PCM runtime instance |
1339 | * @cond: condition bits | |
1340 | * @var: hw_params variable to apply the ratnums constraint | |
877211f5 | 1341 | * @r: struct snd_ratnums constriants |
eb7c06e8 YB |
1342 | * |
1343 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1344 | */ |
877211f5 | 1345 | int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1346 | unsigned int cond, |
1347 | snd_pcm_hw_param_t var, | |
877211f5 | 1348 | struct snd_pcm_hw_constraint_ratnums *r) |
1da177e4 LT |
1349 | { |
1350 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1351 | snd_pcm_hw_rule_ratnums, r, | |
1352 | var, -1); | |
1353 | } | |
1354 | ||
e88e8ae6 TI |
1355 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); |
1356 | ||
877211f5 TI |
1357 | static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, |
1358 | struct snd_pcm_hw_rule *rule) | |
1da177e4 | 1359 | { |
877211f5 | 1360 | struct snd_pcm_hw_constraint_ratdens *r = rule->private; |
1da177e4 LT |
1361 | unsigned int num = 0, den = 0; |
1362 | int err = snd_interval_ratden(hw_param_interval(params, rule->var), | |
1363 | r->nrats, r->rats, &num, &den); | |
1364 | if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { | |
1365 | params->rate_num = num; | |
1366 | params->rate_den = den; | |
1367 | } | |
1368 | return err; | |
1369 | } | |
1370 | ||
1371 | /** | |
1c85cc64 | 1372 | * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter |
df8db936 TI |
1373 | * @runtime: PCM runtime instance |
1374 | * @cond: condition bits | |
1375 | * @var: hw_params variable to apply the ratdens constraint | |
877211f5 | 1376 | * @r: struct snd_ratdens constriants |
eb7c06e8 YB |
1377 | * |
1378 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1379 | */ |
877211f5 | 1380 | int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1381 | unsigned int cond, |
1382 | snd_pcm_hw_param_t var, | |
877211f5 | 1383 | struct snd_pcm_hw_constraint_ratdens *r) |
1da177e4 LT |
1384 | { |
1385 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1386 | snd_pcm_hw_rule_ratdens, r, | |
1387 | var, -1); | |
1388 | } | |
1389 | ||
e88e8ae6 TI |
1390 | EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); |
1391 | ||
877211f5 TI |
1392 | static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, |
1393 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1394 | { |
1395 | unsigned int l = (unsigned long) rule->private; | |
1396 | int width = l & 0xffff; | |
1397 | unsigned int msbits = l >> 16; | |
877211f5 | 1398 | struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); |
1da177e4 LT |
1399 | if (snd_interval_single(i) && snd_interval_value(i) == width) |
1400 | params->msbits = msbits; | |
1401 | return 0; | |
1402 | } | |
1403 | ||
1404 | /** | |
1c85cc64 | 1405 | * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule |
df8db936 TI |
1406 | * @runtime: PCM runtime instance |
1407 | * @cond: condition bits | |
1408 | * @width: sample bits width | |
1409 | * @msbits: msbits width | |
eb7c06e8 YB |
1410 | * |
1411 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1412 | */ |
877211f5 | 1413 | int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1414 | unsigned int cond, |
1415 | unsigned int width, | |
1416 | unsigned int msbits) | |
1417 | { | |
1418 | unsigned long l = (msbits << 16) | width; | |
1419 | return snd_pcm_hw_rule_add(runtime, cond, -1, | |
1420 | snd_pcm_hw_rule_msbits, | |
1421 | (void*) l, | |
1422 | SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); | |
1423 | } | |
1424 | ||
e88e8ae6 TI |
1425 | EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); |
1426 | ||
877211f5 TI |
1427 | static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, |
1428 | struct snd_pcm_hw_rule *rule) | |
1da177e4 LT |
1429 | { |
1430 | unsigned long step = (unsigned long) rule->private; | |
1431 | return snd_interval_step(hw_param_interval(params, rule->var), 0, step); | |
1432 | } | |
1433 | ||
1434 | /** | |
1c85cc64 | 1435 | * snd_pcm_hw_constraint_step - add a hw constraint step rule |
df8db936 TI |
1436 | * @runtime: PCM runtime instance |
1437 | * @cond: condition bits | |
1438 | * @var: hw_params variable to apply the step constraint | |
1439 | * @step: step size | |
eb7c06e8 YB |
1440 | * |
1441 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1442 | */ |
877211f5 | 1443 | int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1444 | unsigned int cond, |
1445 | snd_pcm_hw_param_t var, | |
1446 | unsigned long step) | |
1447 | { | |
1448 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1449 | snd_pcm_hw_rule_step, (void *) step, | |
1450 | var, -1); | |
1451 | } | |
1452 | ||
e88e8ae6 TI |
1453 | EXPORT_SYMBOL(snd_pcm_hw_constraint_step); |
1454 | ||
877211f5 | 1455 | static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) |
1da177e4 | 1456 | { |
67c39317 | 1457 | static unsigned int pow2_sizes[] = { |
1da177e4 LT |
1458 | 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, |
1459 | 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, | |
1460 | 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, | |
1461 | 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 | |
1462 | }; | |
1463 | return snd_interval_list(hw_param_interval(params, rule->var), | |
1464 | ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); | |
1465 | } | |
1466 | ||
1467 | /** | |
1c85cc64 | 1468 | * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule |
df8db936 TI |
1469 | * @runtime: PCM runtime instance |
1470 | * @cond: condition bits | |
1471 | * @var: hw_params variable to apply the power-of-2 constraint | |
eb7c06e8 YB |
1472 | * |
1473 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1474 | */ |
877211f5 | 1475 | int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, |
1da177e4 LT |
1476 | unsigned int cond, |
1477 | snd_pcm_hw_param_t var) | |
1478 | { | |
1479 | return snd_pcm_hw_rule_add(runtime, cond, var, | |
1480 | snd_pcm_hw_rule_pow2, NULL, | |
1481 | var, -1); | |
1482 | } | |
1483 | ||
e88e8ae6 TI |
1484 | EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); |
1485 | ||
d5b702a6 CL |
1486 | static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, |
1487 | struct snd_pcm_hw_rule *rule) | |
1488 | { | |
1489 | unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; | |
1490 | struct snd_interval *rate; | |
1491 | ||
1492 | rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); | |
1493 | return snd_interval_list(rate, 1, &base_rate, 0); | |
1494 | } | |
1495 | ||
1496 | /** | |
1497 | * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling | |
1498 | * @runtime: PCM runtime instance | |
1499 | * @base_rate: the rate at which the hardware does not resample | |
eb7c06e8 YB |
1500 | * |
1501 | * Return: Zero if successful, or a negative error code on failure. | |
d5b702a6 CL |
1502 | */ |
1503 | int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, | |
1504 | unsigned int base_rate) | |
1505 | { | |
1506 | return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, | |
1507 | SNDRV_PCM_HW_PARAM_RATE, | |
1508 | snd_pcm_hw_rule_noresample_func, | |
1509 | (void *)(uintptr_t)base_rate, | |
1510 | SNDRV_PCM_HW_PARAM_RATE, -1); | |
1511 | } | |
1512 | EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); | |
1513 | ||
877211f5 | 1514 | static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, |
123992f7 | 1515 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1516 | { |
1517 | if (hw_is_mask(var)) { | |
1518 | snd_mask_any(hw_param_mask(params, var)); | |
1519 | params->cmask |= 1 << var; | |
1520 | params->rmask |= 1 << var; | |
1521 | return; | |
1522 | } | |
1523 | if (hw_is_interval(var)) { | |
1524 | snd_interval_any(hw_param_interval(params, var)); | |
1525 | params->cmask |= 1 << var; | |
1526 | params->rmask |= 1 << var; | |
1527 | return; | |
1528 | } | |
1529 | snd_BUG(); | |
1530 | } | |
1531 | ||
877211f5 | 1532 | void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) |
1da177e4 LT |
1533 | { |
1534 | unsigned int k; | |
1535 | memset(params, 0, sizeof(*params)); | |
1536 | for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) | |
1537 | _snd_pcm_hw_param_any(params, k); | |
1538 | for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) | |
1539 | _snd_pcm_hw_param_any(params, k); | |
1540 | params->info = ~0U; | |
1541 | } | |
1542 | ||
e88e8ae6 | 1543 | EXPORT_SYMBOL(_snd_pcm_hw_params_any); |
1da177e4 LT |
1544 | |
1545 | /** | |
1c85cc64 | 1546 | * snd_pcm_hw_param_value - return @params field @var value |
df8db936 TI |
1547 | * @params: the hw_params instance |
1548 | * @var: parameter to retrieve | |
1c85cc64 | 1549 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1550 | * |
eb7c06e8 YB |
1551 | * Return: The value for field @var if it's fixed in configuration space |
1552 | * defined by @params. -%EINVAL otherwise. | |
1da177e4 | 1553 | */ |
e88e8ae6 TI |
1554 | int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, |
1555 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1556 | { |
1557 | if (hw_is_mask(var)) { | |
877211f5 | 1558 | const struct snd_mask *mask = hw_param_mask_c(params, var); |
1da177e4 LT |
1559 | if (!snd_mask_single(mask)) |
1560 | return -EINVAL; | |
1561 | if (dir) | |
1562 | *dir = 0; | |
1563 | return snd_mask_value(mask); | |
1564 | } | |
1565 | if (hw_is_interval(var)) { | |
877211f5 | 1566 | const struct snd_interval *i = hw_param_interval_c(params, var); |
1da177e4 LT |
1567 | if (!snd_interval_single(i)) |
1568 | return -EINVAL; | |
1569 | if (dir) | |
1570 | *dir = i->openmin; | |
1571 | return snd_interval_value(i); | |
1572 | } | |
1da177e4 LT |
1573 | return -EINVAL; |
1574 | } | |
1575 | ||
e88e8ae6 | 1576 | EXPORT_SYMBOL(snd_pcm_hw_param_value); |
1da177e4 | 1577 | |
877211f5 | 1578 | void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, |
1da177e4 LT |
1579 | snd_pcm_hw_param_t var) |
1580 | { | |
1581 | if (hw_is_mask(var)) { | |
1582 | snd_mask_none(hw_param_mask(params, var)); | |
1583 | params->cmask |= 1 << var; | |
1584 | params->rmask |= 1 << var; | |
1585 | } else if (hw_is_interval(var)) { | |
1586 | snd_interval_none(hw_param_interval(params, var)); | |
1587 | params->cmask |= 1 << var; | |
1588 | params->rmask |= 1 << var; | |
1589 | } else { | |
1590 | snd_BUG(); | |
1591 | } | |
1592 | } | |
1593 | ||
e88e8ae6 | 1594 | EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); |
1da177e4 | 1595 | |
877211f5 | 1596 | static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, |
123992f7 | 1597 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1598 | { |
1599 | int changed; | |
1600 | if (hw_is_mask(var)) | |
1601 | changed = snd_mask_refine_first(hw_param_mask(params, var)); | |
1602 | else if (hw_is_interval(var)) | |
1603 | changed = snd_interval_refine_first(hw_param_interval(params, var)); | |
2f4ca8e5 | 1604 | else |
1da177e4 | 1605 | return -EINVAL; |
1da177e4 LT |
1606 | if (changed) { |
1607 | params->cmask |= 1 << var; | |
1608 | params->rmask |= 1 << var; | |
1609 | } | |
1610 | return changed; | |
1611 | } | |
1612 | ||
1613 | ||
1614 | /** | |
1c85cc64 | 1615 | * snd_pcm_hw_param_first - refine config space and return minimum value |
df8db936 TI |
1616 | * @pcm: PCM instance |
1617 | * @params: the hw_params instance | |
1618 | * @var: parameter to retrieve | |
1c85cc64 | 1619 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1620 | * |
1c85cc64 | 1621 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1622 | * values > minimum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1623 | * |
1624 | * Return: The minimum, or a negative error code on failure. | |
1da177e4 | 1625 | */ |
e88e8ae6 TI |
1626 | int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, |
1627 | struct snd_pcm_hw_params *params, | |
1628 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1629 | { |
1630 | int changed = _snd_pcm_hw_param_first(params, var); | |
1631 | if (changed < 0) | |
1632 | return changed; | |
1633 | if (params->rmask) { | |
1634 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1635 | if (snd_BUG_ON(err < 0)) |
1636 | return err; | |
1da177e4 LT |
1637 | } |
1638 | return snd_pcm_hw_param_value(params, var, dir); | |
1639 | } | |
1640 | ||
e88e8ae6 TI |
1641 | EXPORT_SYMBOL(snd_pcm_hw_param_first); |
1642 | ||
877211f5 | 1643 | static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, |
123992f7 | 1644 | snd_pcm_hw_param_t var) |
1da177e4 LT |
1645 | { |
1646 | int changed; | |
1647 | if (hw_is_mask(var)) | |
1648 | changed = snd_mask_refine_last(hw_param_mask(params, var)); | |
1649 | else if (hw_is_interval(var)) | |
1650 | changed = snd_interval_refine_last(hw_param_interval(params, var)); | |
2f4ca8e5 | 1651 | else |
1da177e4 | 1652 | return -EINVAL; |
1da177e4 LT |
1653 | if (changed) { |
1654 | params->cmask |= 1 << var; | |
1655 | params->rmask |= 1 << var; | |
1656 | } | |
1657 | return changed; | |
1658 | } | |
1659 | ||
1660 | ||
1661 | /** | |
1c85cc64 | 1662 | * snd_pcm_hw_param_last - refine config space and return maximum value |
df8db936 TI |
1663 | * @pcm: PCM instance |
1664 | * @params: the hw_params instance | |
1665 | * @var: parameter to retrieve | |
1c85cc64 | 1666 | * @dir: pointer to the direction (-1,0,1) or %NULL |
1da177e4 | 1667 | * |
1c85cc64 | 1668 | * Inside configuration space defined by @params remove from @var all |
1da177e4 | 1669 | * values < maximum. Reduce configuration space accordingly. |
eb7c06e8 YB |
1670 | * |
1671 | * Return: The maximum, or a negative error code on failure. | |
1da177e4 | 1672 | */ |
e88e8ae6 TI |
1673 | int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, |
1674 | struct snd_pcm_hw_params *params, | |
1675 | snd_pcm_hw_param_t var, int *dir) | |
1da177e4 LT |
1676 | { |
1677 | int changed = _snd_pcm_hw_param_last(params, var); | |
1678 | if (changed < 0) | |
1679 | return changed; | |
1680 | if (params->rmask) { | |
1681 | int err = snd_pcm_hw_refine(pcm, params); | |
7eaa943c TI |
1682 | if (snd_BUG_ON(err < 0)) |
1683 | return err; | |
1da177e4 LT |
1684 | } |
1685 | return snd_pcm_hw_param_value(params, var, dir); | |
1686 | } | |
1687 | ||
e88e8ae6 | 1688 | EXPORT_SYMBOL(snd_pcm_hw_param_last); |
1da177e4 LT |
1689 | |
1690 | /** | |
1c85cc64 | 1691 | * snd_pcm_hw_param_choose - choose a configuration defined by @params |
df8db936 TI |
1692 | * @pcm: PCM instance |
1693 | * @params: the hw_params instance | |
1da177e4 | 1694 | * |
1c85cc64 | 1695 | * Choose one configuration from configuration space defined by @params. |
1da177e4 LT |
1696 | * The configuration chosen is that obtained fixing in this order: |
1697 | * first access, first format, first subformat, min channels, | |
1698 | * min rate, min period time, max buffer size, min tick time | |
eb7c06e8 YB |
1699 | * |
1700 | * Return: Zero if successful, or a negative error code on failure. | |
1da177e4 | 1701 | */ |
2f4ca8e5 TI |
1702 | int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, |
1703 | struct snd_pcm_hw_params *params) | |
1da177e4 | 1704 | { |
2f4ca8e5 TI |
1705 | static int vars[] = { |
1706 | SNDRV_PCM_HW_PARAM_ACCESS, | |
1707 | SNDRV_PCM_HW_PARAM_FORMAT, | |
1708 | SNDRV_PCM_HW_PARAM_SUBFORMAT, | |
1709 | SNDRV_PCM_HW_PARAM_CHANNELS, | |
1710 | SNDRV_PCM_HW_PARAM_RATE, | |
1711 | SNDRV_PCM_HW_PARAM_PERIOD_TIME, | |
1712 | SNDRV_PCM_HW_PARAM_BUFFER_SIZE, | |
1713 | SNDRV_PCM_HW_PARAM_TICK_TIME, | |
1714 | -1 | |
1715 | }; | |
1716 | int err, *v; | |
1da177e4 | 1717 | |
2f4ca8e5 TI |
1718 | for (v = vars; *v != -1; v++) { |
1719 | if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) | |
1720 | err = snd_pcm_hw_param_first(pcm, params, *v, NULL); | |
1721 | else | |
1722 | err = snd_pcm_hw_param_last(pcm, params, *v, NULL); | |
7eaa943c TI |
1723 | if (snd_BUG_ON(err < 0)) |
1724 | return err; | |
2f4ca8e5 | 1725 | } |
1da177e4 LT |
1726 | return 0; |
1727 | } | |
1728 | ||
877211f5 | 1729 | static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, |
1da177e4 LT |
1730 | void *arg) |
1731 | { | |
877211f5 | 1732 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1733 | unsigned long flags; |
1734 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1735 | if (snd_pcm_running(substream) && | |
1736 | snd_pcm_update_hw_ptr(substream) >= 0) | |
1737 | runtime->status->hw_ptr %= runtime->buffer_size; | |
0e8014d7 | 1738 | else { |
1da177e4 | 1739 | runtime->status->hw_ptr = 0; |
0e8014d7 PLB |
1740 | runtime->hw_ptr_wrap = 0; |
1741 | } | |
1da177e4 LT |
1742 | snd_pcm_stream_unlock_irqrestore(substream, flags); |
1743 | return 0; | |
1744 | } | |
1745 | ||
877211f5 | 1746 | static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, |
1da177e4 LT |
1747 | void *arg) |
1748 | { | |
877211f5 TI |
1749 | struct snd_pcm_channel_info *info = arg; |
1750 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1da177e4 LT |
1751 | int width; |
1752 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { | |
1753 | info->offset = -1; | |
1754 | return 0; | |
1755 | } | |
1756 | width = snd_pcm_format_physical_width(runtime->format); | |
1757 | if (width < 0) | |
1758 | return width; | |
1759 | info->offset = 0; | |
1760 | switch (runtime->access) { | |
1761 | case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: | |
1762 | case SNDRV_PCM_ACCESS_RW_INTERLEAVED: | |
1763 | info->first = info->channel * width; | |
1764 | info->step = runtime->channels * width; | |
1765 | break; | |
1766 | case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: | |
1767 | case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: | |
1768 | { | |
1769 | size_t size = runtime->dma_bytes / runtime->channels; | |
1770 | info->first = info->channel * size * 8; | |
1771 | info->step = width; | |
1772 | break; | |
1773 | } | |
1774 | default: | |
1775 | snd_BUG(); | |
1776 | break; | |
1777 | } | |
1778 | return 0; | |
1779 | } | |
1780 | ||
8bea869c JK |
1781 | static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, |
1782 | void *arg) | |
1783 | { | |
1784 | struct snd_pcm_hw_params *params = arg; | |
1785 | snd_pcm_format_t format; | |
1786 | int channels, width; | |
1787 | ||
1788 | params->fifo_size = substream->runtime->hw.fifo_size; | |
1789 | if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { | |
1790 | format = params_format(params); | |
1791 | channels = params_channels(params); | |
1792 | width = snd_pcm_format_physical_width(format); | |
1793 | params->fifo_size /= width * channels; | |
1794 | } | |
1795 | return 0; | |
1796 | } | |
1797 | ||
1da177e4 LT |
1798 | /** |
1799 | * snd_pcm_lib_ioctl - a generic PCM ioctl callback | |
1800 | * @substream: the pcm substream instance | |
1801 | * @cmd: ioctl command | |
1802 | * @arg: ioctl argument | |
1803 | * | |
1804 | * Processes the generic ioctl commands for PCM. | |
1805 | * Can be passed as the ioctl callback for PCM ops. | |
1806 | * | |
eb7c06e8 | 1807 | * Return: Zero if successful, or a negative error code on failure. |
1da177e4 | 1808 | */ |
877211f5 | 1809 | int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, |
1da177e4 LT |
1810 | unsigned int cmd, void *arg) |
1811 | { | |
1812 | switch (cmd) { | |
1813 | case SNDRV_PCM_IOCTL1_INFO: | |
1814 | return 0; | |
1815 | case SNDRV_PCM_IOCTL1_RESET: | |
1816 | return snd_pcm_lib_ioctl_reset(substream, arg); | |
1817 | case SNDRV_PCM_IOCTL1_CHANNEL_INFO: | |
1818 | return snd_pcm_lib_ioctl_channel_info(substream, arg); | |
8bea869c JK |
1819 | case SNDRV_PCM_IOCTL1_FIFO_SIZE: |
1820 | return snd_pcm_lib_ioctl_fifo_size(substream, arg); | |
1da177e4 LT |
1821 | } |
1822 | return -ENXIO; | |
1823 | } | |
1824 | ||
e88e8ae6 TI |
1825 | EXPORT_SYMBOL(snd_pcm_lib_ioctl); |
1826 | ||
1da177e4 LT |
1827 | /** |
1828 | * snd_pcm_period_elapsed - update the pcm status for the next period | |
1829 | * @substream: the pcm substream instance | |
1830 | * | |
1831 | * This function is called from the interrupt handler when the | |
1832 | * PCM has processed the period size. It will update the current | |
31e8960b | 1833 | * pointer, wake up sleepers, etc. |
1da177e4 LT |
1834 | * |
1835 | * Even if more than one periods have elapsed since the last call, you | |
1836 | * have to call this only once. | |
1837 | */ | |
877211f5 | 1838 | void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) |
1da177e4 | 1839 | { |
877211f5 | 1840 | struct snd_pcm_runtime *runtime; |
1da177e4 LT |
1841 | unsigned long flags; |
1842 | ||
7eaa943c TI |
1843 | if (PCM_RUNTIME_CHECK(substream)) |
1844 | return; | |
1da177e4 | 1845 | runtime = substream->runtime; |
1da177e4 LT |
1846 | |
1847 | if (runtime->transfer_ack_begin) | |
1848 | runtime->transfer_ack_begin(substream); | |
1849 | ||
1850 | snd_pcm_stream_lock_irqsave(substream, flags); | |
1851 | if (!snd_pcm_running(substream) || | |
f240406b | 1852 | snd_pcm_update_hw_ptr0(substream, 1) < 0) |
1da177e4 LT |
1853 | goto _end; |
1854 | ||
1855 | if (substream->timer_running) | |
1856 | snd_timer_interrupt(substream->timer, 1); | |
1da177e4 LT |
1857 | _end: |
1858 | snd_pcm_stream_unlock_irqrestore(substream, flags); | |
1859 | if (runtime->transfer_ack_end) | |
1860 | runtime->transfer_ack_end(substream); | |
1861 | kill_fasync(&runtime->fasync, SIGIO, POLL_IN); | |
1862 | } | |
1863 | ||
e88e8ae6 TI |
1864 | EXPORT_SYMBOL(snd_pcm_period_elapsed); |
1865 | ||
13075510 TI |
1866 | /* |
1867 | * Wait until avail_min data becomes available | |
1868 | * Returns a negative error code if any error occurs during operation. | |
1869 | * The available space is stored on availp. When err = 0 and avail = 0 | |
1870 | * on the capture stream, it indicates the stream is in DRAINING state. | |
1871 | */ | |
5daeba34 | 1872 | static int wait_for_avail(struct snd_pcm_substream *substream, |
13075510 TI |
1873 | snd_pcm_uframes_t *availp) |
1874 | { | |
1875 | struct snd_pcm_runtime *runtime = substream->runtime; | |
1876 | int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; | |
1877 | wait_queue_t wait; | |
1878 | int err = 0; | |
1879 | snd_pcm_uframes_t avail = 0; | |
f2b3614c TI |
1880 | long wait_time, tout; |
1881 | ||
763437a9 AV |
1882 | init_waitqueue_entry(&wait, current); |
1883 | set_current_state(TASK_INTERRUPTIBLE); | |
1884 | add_wait_queue(&runtime->tsleep, &wait); | |
1885 | ||
f2b3614c TI |
1886 | if (runtime->no_period_wakeup) |
1887 | wait_time = MAX_SCHEDULE_TIMEOUT; | |
1888 | else { | |
1889 | wait_time = 10; | |
1890 | if (runtime->rate) { | |
1891 | long t = runtime->period_size * 2 / runtime->rate; | |
1892 | wait_time = max(t, wait_time); | |
1893 | } | |
1894 | wait_time = msecs_to_jiffies(wait_time * 1000); | |
1895 | } | |
763437a9 | 1896 | |
13075510 TI |
1897 | for (;;) { |
1898 | if (signal_pending(current)) { | |
1899 | err = -ERESTARTSYS; | |
1900 | break; | |
1901 | } | |
763437a9 AV |
1902 | |
1903 | /* | |
1904 | * We need to check if space became available already | |
1905 | * (and thus the wakeup happened already) first to close | |
1906 | * the race of space already having become available. | |
1907 | * This check must happen after been added to the waitqueue | |
1908 | * and having current state be INTERRUPTIBLE. | |
1909 | */ | |
1910 | if (is_playback) | |
1911 | avail = snd_pcm_playback_avail(runtime); | |
1912 | else | |
1913 | avail = snd_pcm_capture_avail(runtime); | |
1914 | if (avail >= runtime->twake) | |
1915 | break; | |
13075510 | 1916 | snd_pcm_stream_unlock_irq(substream); |
763437a9 AV |
1917 | |
1918 | tout = schedule_timeout(wait_time); | |
1919 | ||
13075510 | 1920 | snd_pcm_stream_lock_irq(substream); |
763437a9 | 1921 | set_current_state(TASK_INTERRUPTIBLE); |
13075510 TI |
1922 | switch (runtime->status->state) { |
1923 | case SNDRV_PCM_STATE_SUSPENDED: | |
1924 | err = -ESTRPIPE; | |
1925 | goto _endloop; | |
1926 | case SNDRV_PCM_STATE_XRUN: | |
1927 | err = -EPIPE; | |
1928 | goto _endloop; | |
1929 | case SNDRV_PCM_STATE_DRAINING: | |
1930 | if (is_playback) | |
1931 | err = -EPIPE; | |
1932 | else | |
1933 | avail = 0; /* indicate draining */ | |
1934 | goto _endloop; | |
1935 | case SNDRV_PCM_STATE_OPEN: | |
1936 | case SNDRV_PCM_STATE_SETUP: | |
1937 | case SNDRV_PCM_STATE_DISCONNECTED: | |
1938 | err = -EBADFD; | |
1939 | goto _endloop; | |
1940 | } | |
1941 | if (!tout) { | |
1942 | snd_printd("%s write error (DMA or IRQ trouble?)\n", | |
1943 | is_playback ? "playback" : "capture"); | |
1944 | err = -EIO; | |
1945 | break; | |
1946 | } | |
13075510 TI |
1947 | } |
1948 | _endloop: | |
763437a9 | 1949 | set_current_state(TASK_RUNNING); |
c91a988d | 1950 | remove_wait_queue(&runtime->tsleep, &wait); |
13075510 TI |
1951 | *availp = avail; |
1952 | return err; | |
1953 | } | |
1954 | ||
877211f5 | 1955 | static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
1956 | unsigned int hwoff, |
1957 | unsigned long data, unsigned int off, | |
1958 | snd_pcm_uframes_t frames) | |
1959 | { | |
877211f5 | 1960 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1961 | int err; |
1962 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
1963 | if (substream->ops->copy) { | |
1964 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
1965 | return err; | |
1966 | } else { | |
1967 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
1968 | if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) |
1969 | return -EFAULT; | |
1970 | } | |
1971 | return 0; | |
1972 | } | |
1973 | ||
877211f5 | 1974 | typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, |
1da177e4 LT |
1975 | unsigned long data, unsigned int off, |
1976 | snd_pcm_uframes_t size); | |
1977 | ||
877211f5 | 1978 | static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, |
1da177e4 LT |
1979 | unsigned long data, |
1980 | snd_pcm_uframes_t size, | |
1981 | int nonblock, | |
1982 | transfer_f transfer) | |
1983 | { | |
877211f5 | 1984 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
1985 | snd_pcm_uframes_t xfer = 0; |
1986 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 1987 | snd_pcm_uframes_t avail; |
1da177e4 LT |
1988 | int err = 0; |
1989 | ||
1990 | if (size == 0) | |
1991 | return 0; | |
1da177e4 LT |
1992 | |
1993 | snd_pcm_stream_lock_irq(substream); | |
1994 | switch (runtime->status->state) { | |
1995 | case SNDRV_PCM_STATE_PREPARED: | |
1996 | case SNDRV_PCM_STATE_RUNNING: | |
1997 | case SNDRV_PCM_STATE_PAUSED: | |
1998 | break; | |
1999 | case SNDRV_PCM_STATE_XRUN: | |
2000 | err = -EPIPE; | |
2001 | goto _end_unlock; | |
2002 | case SNDRV_PCM_STATE_SUSPENDED: | |
2003 | err = -ESTRPIPE; | |
2004 | goto _end_unlock; | |
2005 | default: | |
2006 | err = -EBADFD; | |
2007 | goto _end_unlock; | |
2008 | } | |
2009 | ||
5daeba34 | 2010 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2011 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2012 | snd_pcm_update_hw_ptr(substream); | |
2013 | avail = snd_pcm_playback_avail(runtime); | |
1da177e4 LT |
2014 | while (size > 0) { |
2015 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2016 | snd_pcm_uframes_t cont; |
13075510 | 2017 | if (!avail) { |
1da177e4 LT |
2018 | if (nonblock) { |
2019 | err = -EAGAIN; | |
2020 | goto _end_unlock; | |
2021 | } | |
5daeba34 DD |
2022 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2023 | runtime->control->avail_min ? : 1); | |
2024 | err = wait_for_avail(substream, &avail); | |
13075510 | 2025 | if (err < 0) |
443feb88 | 2026 | goto _end_unlock; |
1da177e4 | 2027 | } |
1da177e4 LT |
2028 | frames = size > avail ? avail : size; |
2029 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2030 | if (frames > cont) | |
2031 | frames = cont; | |
7eaa943c | 2032 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2033 | runtime->twake = 0; |
7eaa943c TI |
2034 | snd_pcm_stream_unlock_irq(substream); |
2035 | return -EINVAL; | |
2036 | } | |
1da177e4 LT |
2037 | appl_ptr = runtime->control->appl_ptr; |
2038 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2039 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2040 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2041 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2042 | if (err < 0) |
2043 | goto _end_unlock; | |
1da177e4 LT |
2044 | switch (runtime->status->state) { |
2045 | case SNDRV_PCM_STATE_XRUN: | |
2046 | err = -EPIPE; | |
2047 | goto _end_unlock; | |
2048 | case SNDRV_PCM_STATE_SUSPENDED: | |
2049 | err = -ESTRPIPE; | |
2050 | goto _end_unlock; | |
2051 | default: | |
2052 | break; | |
2053 | } | |
2054 | appl_ptr += frames; | |
2055 | if (appl_ptr >= runtime->boundary) | |
2056 | appl_ptr -= runtime->boundary; | |
2057 | runtime->control->appl_ptr = appl_ptr; | |
2058 | if (substream->ops->ack) | |
2059 | substream->ops->ack(substream); | |
2060 | ||
2061 | offset += frames; | |
2062 | size -= frames; | |
2063 | xfer += frames; | |
0910c216 | 2064 | avail -= frames; |
1da177e4 LT |
2065 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && |
2066 | snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { | |
2067 | err = snd_pcm_start(substream); | |
2068 | if (err < 0) | |
2069 | goto _end_unlock; | |
2070 | } | |
1da177e4 LT |
2071 | } |
2072 | _end_unlock: | |
c91a988d | 2073 | runtime->twake = 0; |
1250932e JK |
2074 | if (xfer > 0 && err >= 0) |
2075 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2076 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2077 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2078 | } | |
2079 | ||
7eaa943c TI |
2080 | /* sanity-check for read/write methods */ |
2081 | static int pcm_sanity_check(struct snd_pcm_substream *substream) | |
1da177e4 | 2082 | { |
877211f5 | 2083 | struct snd_pcm_runtime *runtime; |
7eaa943c TI |
2084 | if (PCM_RUNTIME_CHECK(substream)) |
2085 | return -ENXIO; | |
1da177e4 | 2086 | runtime = substream->runtime; |
7eaa943c TI |
2087 | if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) |
2088 | return -EINVAL; | |
1da177e4 LT |
2089 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2090 | return -EBADFD; | |
7eaa943c TI |
2091 | return 0; |
2092 | } | |
2093 | ||
2094 | snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) | |
2095 | { | |
2096 | struct snd_pcm_runtime *runtime; | |
2097 | int nonblock; | |
2098 | int err; | |
1da177e4 | 2099 | |
7eaa943c TI |
2100 | err = pcm_sanity_check(substream); |
2101 | if (err < 0) | |
2102 | return err; | |
2103 | runtime = substream->runtime; | |
0df63e44 | 2104 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2105 | |
2106 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && | |
2107 | runtime->channels > 1) | |
2108 | return -EINVAL; | |
2109 | return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, | |
2110 | snd_pcm_lib_write_transfer); | |
2111 | } | |
2112 | ||
e88e8ae6 TI |
2113 | EXPORT_SYMBOL(snd_pcm_lib_write); |
2114 | ||
877211f5 | 2115 | static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2116 | unsigned int hwoff, |
2117 | unsigned long data, unsigned int off, | |
2118 | snd_pcm_uframes_t frames) | |
2119 | { | |
877211f5 | 2120 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2121 | int err; |
2122 | void __user **bufs = (void __user **)data; | |
2123 | int channels = runtime->channels; | |
2124 | int c; | |
2125 | if (substream->ops->copy) { | |
7eaa943c TI |
2126 | if (snd_BUG_ON(!substream->ops->silence)) |
2127 | return -EINVAL; | |
1da177e4 LT |
2128 | for (c = 0; c < channels; ++c, ++bufs) { |
2129 | if (*bufs == NULL) { | |
2130 | if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) | |
2131 | return err; | |
2132 | } else { | |
2133 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2134 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2135 | return err; | |
2136 | } | |
2137 | } | |
2138 | } else { | |
2139 | /* default transfer behaviour */ | |
2140 | size_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2141 | for (c = 0; c < channels; ++c, ++bufs) { |
2142 | char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2143 | if (*bufs == NULL) { | |
2144 | snd_pcm_format_set_silence(runtime->format, hwbuf, frames); | |
2145 | } else { | |
2146 | char __user *buf = *bufs + samples_to_bytes(runtime, off); | |
2147 | if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) | |
2148 | return -EFAULT; | |
2149 | } | |
2150 | } | |
2151 | } | |
2152 | return 0; | |
2153 | } | |
2154 | ||
877211f5 | 2155 | snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, |
1da177e4 LT |
2156 | void __user **bufs, |
2157 | snd_pcm_uframes_t frames) | |
2158 | { | |
877211f5 | 2159 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2160 | int nonblock; |
7eaa943c | 2161 | int err; |
1da177e4 | 2162 | |
7eaa943c TI |
2163 | err = pcm_sanity_check(substream); |
2164 | if (err < 0) | |
2165 | return err; | |
1da177e4 | 2166 | runtime = substream->runtime; |
0df63e44 | 2167 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2168 | |
2169 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) | |
2170 | return -EINVAL; | |
2171 | return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, | |
2172 | nonblock, snd_pcm_lib_writev_transfer); | |
2173 | } | |
2174 | ||
e88e8ae6 TI |
2175 | EXPORT_SYMBOL(snd_pcm_lib_writev); |
2176 | ||
877211f5 | 2177 | static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2178 | unsigned int hwoff, |
2179 | unsigned long data, unsigned int off, | |
2180 | snd_pcm_uframes_t frames) | |
2181 | { | |
877211f5 | 2182 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2183 | int err; |
2184 | char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); | |
2185 | if (substream->ops->copy) { | |
2186 | if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) | |
2187 | return err; | |
2188 | } else { | |
2189 | char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); | |
1da177e4 LT |
2190 | if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) |
2191 | return -EFAULT; | |
2192 | } | |
2193 | return 0; | |
2194 | } | |
2195 | ||
877211f5 | 2196 | static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, |
1da177e4 LT |
2197 | unsigned long data, |
2198 | snd_pcm_uframes_t size, | |
2199 | int nonblock, | |
2200 | transfer_f transfer) | |
2201 | { | |
877211f5 | 2202 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2203 | snd_pcm_uframes_t xfer = 0; |
2204 | snd_pcm_uframes_t offset = 0; | |
0910c216 | 2205 | snd_pcm_uframes_t avail; |
1da177e4 LT |
2206 | int err = 0; |
2207 | ||
2208 | if (size == 0) | |
2209 | return 0; | |
1da177e4 LT |
2210 | |
2211 | snd_pcm_stream_lock_irq(substream); | |
2212 | switch (runtime->status->state) { | |
2213 | case SNDRV_PCM_STATE_PREPARED: | |
2214 | if (size >= runtime->start_threshold) { | |
2215 | err = snd_pcm_start(substream); | |
2216 | if (err < 0) | |
2217 | goto _end_unlock; | |
2218 | } | |
2219 | break; | |
2220 | case SNDRV_PCM_STATE_DRAINING: | |
2221 | case SNDRV_PCM_STATE_RUNNING: | |
2222 | case SNDRV_PCM_STATE_PAUSED: | |
2223 | break; | |
2224 | case SNDRV_PCM_STATE_XRUN: | |
2225 | err = -EPIPE; | |
2226 | goto _end_unlock; | |
2227 | case SNDRV_PCM_STATE_SUSPENDED: | |
2228 | err = -ESTRPIPE; | |
2229 | goto _end_unlock; | |
2230 | default: | |
2231 | err = -EBADFD; | |
2232 | goto _end_unlock; | |
2233 | } | |
2234 | ||
5daeba34 | 2235 | runtime->twake = runtime->control->avail_min ? : 1; |
0910c216 TI |
2236 | if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) |
2237 | snd_pcm_update_hw_ptr(substream); | |
2238 | avail = snd_pcm_capture_avail(runtime); | |
1da177e4 LT |
2239 | while (size > 0) { |
2240 | snd_pcm_uframes_t frames, appl_ptr, appl_ofs; | |
1da177e4 | 2241 | snd_pcm_uframes_t cont; |
13075510 TI |
2242 | if (!avail) { |
2243 | if (runtime->status->state == | |
2244 | SNDRV_PCM_STATE_DRAINING) { | |
2245 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); | |
1da177e4 LT |
2246 | goto _end_unlock; |
2247 | } | |
1da177e4 LT |
2248 | if (nonblock) { |
2249 | err = -EAGAIN; | |
2250 | goto _end_unlock; | |
2251 | } | |
5daeba34 DD |
2252 | runtime->twake = min_t(snd_pcm_uframes_t, size, |
2253 | runtime->control->avail_min ? : 1); | |
2254 | err = wait_for_avail(substream, &avail); | |
13075510 | 2255 | if (err < 0) |
443feb88 | 2256 | goto _end_unlock; |
13075510 TI |
2257 | if (!avail) |
2258 | continue; /* draining */ | |
1da177e4 | 2259 | } |
1da177e4 LT |
2260 | frames = size > avail ? avail : size; |
2261 | cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; | |
2262 | if (frames > cont) | |
2263 | frames = cont; | |
7eaa943c | 2264 | if (snd_BUG_ON(!frames)) { |
c91a988d | 2265 | runtime->twake = 0; |
7eaa943c TI |
2266 | snd_pcm_stream_unlock_irq(substream); |
2267 | return -EINVAL; | |
2268 | } | |
1da177e4 LT |
2269 | appl_ptr = runtime->control->appl_ptr; |
2270 | appl_ofs = appl_ptr % runtime->buffer_size; | |
2271 | snd_pcm_stream_unlock_irq(substream); | |
1250932e | 2272 | err = transfer(substream, appl_ofs, data, offset, frames); |
1da177e4 | 2273 | snd_pcm_stream_lock_irq(substream); |
1250932e JK |
2274 | if (err < 0) |
2275 | goto _end_unlock; | |
1da177e4 LT |
2276 | switch (runtime->status->state) { |
2277 | case SNDRV_PCM_STATE_XRUN: | |
2278 | err = -EPIPE; | |
2279 | goto _end_unlock; | |
2280 | case SNDRV_PCM_STATE_SUSPENDED: | |
2281 | err = -ESTRPIPE; | |
2282 | goto _end_unlock; | |
2283 | default: | |
2284 | break; | |
2285 | } | |
2286 | appl_ptr += frames; | |
2287 | if (appl_ptr >= runtime->boundary) | |
2288 | appl_ptr -= runtime->boundary; | |
2289 | runtime->control->appl_ptr = appl_ptr; | |
2290 | if (substream->ops->ack) | |
2291 | substream->ops->ack(substream); | |
2292 | ||
2293 | offset += frames; | |
2294 | size -= frames; | |
2295 | xfer += frames; | |
0910c216 | 2296 | avail -= frames; |
1da177e4 LT |
2297 | } |
2298 | _end_unlock: | |
c91a988d | 2299 | runtime->twake = 0; |
1250932e JK |
2300 | if (xfer > 0 && err >= 0) |
2301 | snd_pcm_update_state(substream, runtime); | |
1da177e4 | 2302 | snd_pcm_stream_unlock_irq(substream); |
1da177e4 LT |
2303 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; |
2304 | } | |
2305 | ||
877211f5 | 2306 | snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) |
1da177e4 | 2307 | { |
877211f5 | 2308 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2309 | int nonblock; |
7eaa943c | 2310 | int err; |
1da177e4 | 2311 | |
7eaa943c TI |
2312 | err = pcm_sanity_check(substream); |
2313 | if (err < 0) | |
2314 | return err; | |
1da177e4 | 2315 | runtime = substream->runtime; |
0df63e44 | 2316 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2317 | if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) |
2318 | return -EINVAL; | |
2319 | return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); | |
2320 | } | |
2321 | ||
e88e8ae6 TI |
2322 | EXPORT_SYMBOL(snd_pcm_lib_read); |
2323 | ||
877211f5 | 2324 | static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, |
1da177e4 LT |
2325 | unsigned int hwoff, |
2326 | unsigned long data, unsigned int off, | |
2327 | snd_pcm_uframes_t frames) | |
2328 | { | |
877211f5 | 2329 | struct snd_pcm_runtime *runtime = substream->runtime; |
1da177e4 LT |
2330 | int err; |
2331 | void __user **bufs = (void __user **)data; | |
2332 | int channels = runtime->channels; | |
2333 | int c; | |
2334 | if (substream->ops->copy) { | |
2335 | for (c = 0; c < channels; ++c, ++bufs) { | |
2336 | char __user *buf; | |
2337 | if (*bufs == NULL) | |
2338 | continue; | |
2339 | buf = *bufs + samples_to_bytes(runtime, off); | |
2340 | if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) | |
2341 | return err; | |
2342 | } | |
2343 | } else { | |
2344 | snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; | |
1da177e4 LT |
2345 | for (c = 0; c < channels; ++c, ++bufs) { |
2346 | char *hwbuf; | |
2347 | char __user *buf; | |
2348 | if (*bufs == NULL) | |
2349 | continue; | |
2350 | ||
2351 | hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); | |
2352 | buf = *bufs + samples_to_bytes(runtime, off); | |
2353 | if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) | |
2354 | return -EFAULT; | |
2355 | } | |
2356 | } | |
2357 | return 0; | |
2358 | } | |
2359 | ||
877211f5 | 2360 | snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, |
1da177e4 LT |
2361 | void __user **bufs, |
2362 | snd_pcm_uframes_t frames) | |
2363 | { | |
877211f5 | 2364 | struct snd_pcm_runtime *runtime; |
1da177e4 | 2365 | int nonblock; |
7eaa943c | 2366 | int err; |
1da177e4 | 2367 | |
7eaa943c TI |
2368 | err = pcm_sanity_check(substream); |
2369 | if (err < 0) | |
2370 | return err; | |
1da177e4 | 2371 | runtime = substream->runtime; |
1da177e4 LT |
2372 | if (runtime->status->state == SNDRV_PCM_STATE_OPEN) |
2373 | return -EBADFD; | |
2374 | ||
0df63e44 | 2375 | nonblock = !!(substream->f_flags & O_NONBLOCK); |
1da177e4 LT |
2376 | if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) |
2377 | return -EINVAL; | |
2378 | return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); | |
2379 | } | |
2380 | ||
1da177e4 | 2381 | EXPORT_SYMBOL(snd_pcm_lib_readv); |
2d3391ec TI |
2382 | |
2383 | /* | |
2384 | * standard channel mapping helpers | |
2385 | */ | |
2386 | ||
2387 | /* default channel maps for multi-channel playbacks, up to 8 channels */ | |
2388 | const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { | |
2389 | { .channels = 1, | |
5efbc261 | 2390 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2391 | { .channels = 2, |
2392 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2393 | { .channels = 4, | |
2394 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2395 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2396 | { .channels = 6, | |
2397 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2398 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2399 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, | |
2400 | { .channels = 8, | |
2401 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2402 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2403 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2404 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2405 | { } | |
2406 | }; | |
2407 | EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); | |
2408 | ||
2409 | /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ | |
2410 | const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { | |
2411 | { .channels = 1, | |
5efbc261 | 2412 | .map = { SNDRV_CHMAP_MONO } }, |
2d3391ec TI |
2413 | { .channels = 2, |
2414 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, | |
2415 | { .channels = 4, | |
2416 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2417 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2418 | { .channels = 6, | |
2419 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2420 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2421 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, | |
2422 | { .channels = 8, | |
2423 | .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, | |
2424 | SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, | |
2425 | SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, | |
2426 | SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, | |
2427 | { } | |
2428 | }; | |
2429 | EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); | |
2430 | ||
2431 | static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) | |
2432 | { | |
2433 | if (ch > info->max_channels) | |
2434 | return false; | |
2435 | return !info->channel_mask || (info->channel_mask & (1U << ch)); | |
2436 | } | |
2437 | ||
2438 | static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, | |
2439 | struct snd_ctl_elem_info *uinfo) | |
2440 | { | |
2441 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2442 | ||
2443 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
2444 | uinfo->count = 0; | |
2445 | uinfo->count = info->max_channels; | |
2446 | uinfo->value.integer.min = 0; | |
2447 | uinfo->value.integer.max = SNDRV_CHMAP_LAST; | |
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | /* get callback for channel map ctl element | |
2452 | * stores the channel position firstly matching with the current channels | |
2453 | */ | |
2454 | static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, | |
2455 | struct snd_ctl_elem_value *ucontrol) | |
2456 | { | |
2457 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2458 | unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); | |
2459 | struct snd_pcm_substream *substream; | |
2460 | const struct snd_pcm_chmap_elem *map; | |
2461 | ||
2462 | if (snd_BUG_ON(!info->chmap)) | |
2463 | return -EINVAL; | |
2464 | substream = snd_pcm_chmap_substream(info, idx); | |
2465 | if (!substream) | |
2466 | return -ENODEV; | |
2467 | memset(ucontrol->value.integer.value, 0, | |
2468 | sizeof(ucontrol->value.integer.value)); | |
2469 | if (!substream->runtime) | |
2470 | return 0; /* no channels set */ | |
2471 | for (map = info->chmap; map->channels; map++) { | |
2472 | int i; | |
2473 | if (map->channels == substream->runtime->channels && | |
2474 | valid_chmap_channels(info, map->channels)) { | |
2475 | for (i = 0; i < map->channels; i++) | |
2476 | ucontrol->value.integer.value[i] = map->map[i]; | |
2477 | return 0; | |
2478 | } | |
2479 | } | |
2480 | return -EINVAL; | |
2481 | } | |
2482 | ||
2483 | /* tlv callback for channel map ctl element | |
2484 | * expands the pre-defined channel maps in a form of TLV | |
2485 | */ | |
2486 | static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, | |
2487 | unsigned int size, unsigned int __user *tlv) | |
2488 | { | |
2489 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2490 | const struct snd_pcm_chmap_elem *map; | |
2491 | unsigned int __user *dst; | |
2492 | int c, count = 0; | |
2493 | ||
2494 | if (snd_BUG_ON(!info->chmap)) | |
2495 | return -EINVAL; | |
2496 | if (size < 8) | |
2497 | return -ENOMEM; | |
2498 | if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) | |
2499 | return -EFAULT; | |
2500 | size -= 8; | |
2501 | dst = tlv + 2; | |
2502 | for (map = info->chmap; map->channels; map++) { | |
2503 | int chs_bytes = map->channels * 4; | |
2504 | if (!valid_chmap_channels(info, map->channels)) | |
2505 | continue; | |
2506 | if (size < 8) | |
2507 | return -ENOMEM; | |
2508 | if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || | |
2509 | put_user(chs_bytes, dst + 1)) | |
2510 | return -EFAULT; | |
2511 | dst += 2; | |
2512 | size -= 8; | |
2513 | count += 8; | |
2514 | if (size < chs_bytes) | |
2515 | return -ENOMEM; | |
2516 | size -= chs_bytes; | |
2517 | count += chs_bytes; | |
2518 | for (c = 0; c < map->channels; c++) { | |
2519 | if (put_user(map->map[c], dst)) | |
2520 | return -EFAULT; | |
2521 | dst++; | |
2522 | } | |
2523 | } | |
2524 | if (put_user(count, tlv + 1)) | |
2525 | return -EFAULT; | |
2526 | return 0; | |
2527 | } | |
2528 | ||
2529 | static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) | |
2530 | { | |
2531 | struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); | |
2532 | info->pcm->streams[info->stream].chmap_kctl = NULL; | |
2533 | kfree(info); | |
2534 | } | |
2535 | ||
2536 | /** | |
2537 | * snd_pcm_add_chmap_ctls - create channel-mapping control elements | |
2538 | * @pcm: the assigned PCM instance | |
2539 | * @stream: stream direction | |
2540 | * @chmap: channel map elements (for query) | |
2541 | * @max_channels: the max number of channels for the stream | |
2542 | * @private_value: the value passed to each kcontrol's private_value field | |
2543 | * @info_ret: store struct snd_pcm_chmap instance if non-NULL | |
2544 | * | |
2545 | * Create channel-mapping control elements assigned to the given PCM stream(s). | |
eb7c06e8 | 2546 | * Return: Zero if successful, or a negative error value. |
2d3391ec TI |
2547 | */ |
2548 | int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, | |
2549 | const struct snd_pcm_chmap_elem *chmap, | |
2550 | int max_channels, | |
2551 | unsigned long private_value, | |
2552 | struct snd_pcm_chmap **info_ret) | |
2553 | { | |
2554 | struct snd_pcm_chmap *info; | |
2555 | struct snd_kcontrol_new knew = { | |
2556 | .iface = SNDRV_CTL_ELEM_IFACE_PCM, | |
2557 | .access = SNDRV_CTL_ELEM_ACCESS_READ | | |
2d3391ec TI |
2558 | SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
2559 | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, | |
2560 | .info = pcm_chmap_ctl_info, | |
2561 | .get = pcm_chmap_ctl_get, | |
2562 | .tlv.c = pcm_chmap_ctl_tlv, | |
2563 | }; | |
2564 | int err; | |
2565 | ||
2566 | info = kzalloc(sizeof(*info), GFP_KERNEL); | |
2567 | if (!info) | |
2568 | return -ENOMEM; | |
2569 | info->pcm = pcm; | |
2570 | info->stream = stream; | |
2571 | info->chmap = chmap; | |
2572 | info->max_channels = max_channels; | |
2573 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) | |
2574 | knew.name = "Playback Channel Map"; | |
2575 | else | |
2576 | knew.name = "Capture Channel Map"; | |
2577 | knew.device = pcm->device; | |
2578 | knew.count = pcm->streams[stream].substream_count; | |
2579 | knew.private_value = private_value; | |
2580 | info->kctl = snd_ctl_new1(&knew, info); | |
2581 | if (!info->kctl) { | |
2582 | kfree(info); | |
2583 | return -ENOMEM; | |
2584 | } | |
2585 | info->kctl->private_free = pcm_chmap_ctl_private_free; | |
2586 | err = snd_ctl_add(pcm->card, info->kctl); | |
2587 | if (err < 0) | |
2588 | return err; | |
2589 | pcm->streams[stream].chmap_kctl = info->kctl; | |
2590 | if (info_ret) | |
2591 | *info_ret = info; | |
2592 | return 0; | |
2593 | } | |
2594 | EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); |