11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Digital Audio (PCM) abstract layer 3c1017a4cSJaroslav Kysela * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 41da177e4SLinus Torvalds * Abramo Bagnara <abramo@alsa-project.org> 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 81da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 91da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 101da177e4SLinus Torvalds * (at your option) any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 131da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 141da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 151da177e4SLinus Torvalds * GNU General Public License for more details. 161da177e4SLinus Torvalds * 171da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 181da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 191da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds */ 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <linux/slab.h> 241da177e4SLinus Torvalds #include <linux/time.h> 253f7440a6STakashi Iwai #include <linux/math64.h> 26d81a6d71SPaul Gortmaker #include <linux/export.h> 271da177e4SLinus Torvalds #include <sound/core.h> 281da177e4SLinus Torvalds #include <sound/control.h> 292d3391ecSTakashi Iwai #include <sound/tlv.h> 301da177e4SLinus Torvalds #include <sound/info.h> 311da177e4SLinus Torvalds #include <sound/pcm.h> 321da177e4SLinus Torvalds #include <sound/pcm_params.h> 331da177e4SLinus Torvalds #include <sound/timer.h> 341da177e4SLinus Torvalds 35f5914908STakashi Iwai #ifdef CONFIG_SND_PCM_XRUN_DEBUG 36f5914908STakashi Iwai #define CREATE_TRACE_POINTS 37f5914908STakashi Iwai #include "pcm_trace.h" 38f5914908STakashi Iwai #else 39f5914908STakashi Iwai #define trace_hwptr(substream, pos, in_interrupt) 40f5914908STakashi Iwai #define trace_xrun(substream) 41f5914908STakashi Iwai #define trace_hw_ptr_error(substream, reason) 42f5914908STakashi Iwai #endif 43f5914908STakashi Iwai 441da177e4SLinus Torvalds /* 451da177e4SLinus Torvalds * fill ring buffer with silence 461da177e4SLinus Torvalds * runtime->silence_start: starting pointer to silence area 471da177e4SLinus Torvalds * runtime->silence_filled: size filled with silence 481da177e4SLinus Torvalds * runtime->silence_threshold: threshold from application 491da177e4SLinus Torvalds * runtime->silence_size: maximal size from application 501da177e4SLinus Torvalds * 511da177e4SLinus Torvalds * when runtime->silence_size >= runtime->boundary - fill processed area with silence immediately 521da177e4SLinus Torvalds */ 53877211f5STakashi Iwai void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_uframes_t new_hw_ptr) 541da177e4SLinus Torvalds { 55877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 561da177e4SLinus Torvalds snd_pcm_uframes_t frames, ofs, transfer; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds if (runtime->silence_size < runtime->boundary) { 591da177e4SLinus Torvalds snd_pcm_sframes_t noise_dist, n; 601da177e4SLinus Torvalds if (runtime->silence_start != runtime->control->appl_ptr) { 611da177e4SLinus Torvalds n = runtime->control->appl_ptr - runtime->silence_start; 621da177e4SLinus Torvalds if (n < 0) 631da177e4SLinus Torvalds n += runtime->boundary; 641da177e4SLinus Torvalds if ((snd_pcm_uframes_t)n < runtime->silence_filled) 651da177e4SLinus Torvalds runtime->silence_filled -= n; 661da177e4SLinus Torvalds else 671da177e4SLinus Torvalds runtime->silence_filled = 0; 681da177e4SLinus Torvalds runtime->silence_start = runtime->control->appl_ptr; 691da177e4SLinus Torvalds } 70235475cbSTakashi Iwai if (runtime->silence_filled >= runtime->buffer_size) 711da177e4SLinus Torvalds return; 721da177e4SLinus Torvalds noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled; 731da177e4SLinus Torvalds if (noise_dist >= (snd_pcm_sframes_t) runtime->silence_threshold) 741da177e4SLinus Torvalds return; 751da177e4SLinus Torvalds frames = runtime->silence_threshold - noise_dist; 761da177e4SLinus Torvalds if (frames > runtime->silence_size) 771da177e4SLinus Torvalds frames = runtime->silence_size; 781da177e4SLinus Torvalds } else { 791da177e4SLinus Torvalds if (new_hw_ptr == ULONG_MAX) { /* initialization */ 801da177e4SLinus Torvalds snd_pcm_sframes_t avail = snd_pcm_playback_hw_avail(runtime); 819e216e8aSJaroslav Kysela if (avail > runtime->buffer_size) 829e216e8aSJaroslav Kysela avail = runtime->buffer_size; 831da177e4SLinus Torvalds runtime->silence_filled = avail > 0 ? avail : 0; 841da177e4SLinus Torvalds runtime->silence_start = (runtime->status->hw_ptr + 851da177e4SLinus Torvalds runtime->silence_filled) % 861da177e4SLinus Torvalds runtime->boundary; 871da177e4SLinus Torvalds } else { 881da177e4SLinus Torvalds ofs = runtime->status->hw_ptr; 891da177e4SLinus Torvalds frames = new_hw_ptr - ofs; 901da177e4SLinus Torvalds if ((snd_pcm_sframes_t)frames < 0) 911da177e4SLinus Torvalds frames += runtime->boundary; 921da177e4SLinus Torvalds runtime->silence_filled -= frames; 931da177e4SLinus Torvalds if ((snd_pcm_sframes_t)runtime->silence_filled < 0) { 941da177e4SLinus Torvalds runtime->silence_filled = 0; 959a826ddbSClemens Ladisch runtime->silence_start = new_hw_ptr; 961da177e4SLinus Torvalds } else { 979a826ddbSClemens Ladisch runtime->silence_start = ofs; 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds frames = runtime->buffer_size - runtime->silence_filled; 1011da177e4SLinus Torvalds } 1027eaa943cSTakashi Iwai if (snd_BUG_ON(frames > runtime->buffer_size)) 1037eaa943cSTakashi Iwai return; 1041da177e4SLinus Torvalds if (frames == 0) 1051da177e4SLinus Torvalds return; 1069a826ddbSClemens Ladisch ofs = runtime->silence_start % runtime->buffer_size; 1071da177e4SLinus Torvalds while (frames > 0) { 1081da177e4SLinus Torvalds transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames; 1091da177e4SLinus Torvalds if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED || 1101da177e4SLinus Torvalds runtime->access == SNDRV_PCM_ACCESS_MMAP_INTERLEAVED) { 1111da177e4SLinus Torvalds if (substream->ops->silence) { 1121da177e4SLinus Torvalds int err; 1131da177e4SLinus Torvalds err = substream->ops->silence(substream, -1, ofs, transfer); 1147eaa943cSTakashi Iwai snd_BUG_ON(err < 0); 1151da177e4SLinus Torvalds } else { 1161da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, ofs); 1171da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, transfer * runtime->channels); 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds } else { 1201da177e4SLinus Torvalds unsigned int c; 1211da177e4SLinus Torvalds unsigned int channels = runtime->channels; 1221da177e4SLinus Torvalds if (substream->ops->silence) { 1231da177e4SLinus Torvalds for (c = 0; c < channels; ++c) { 1241da177e4SLinus Torvalds int err; 1251da177e4SLinus Torvalds err = substream->ops->silence(substream, c, ofs, transfer); 1267eaa943cSTakashi Iwai snd_BUG_ON(err < 0); 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds } else { 1291da177e4SLinus Torvalds size_t dma_csize = runtime->dma_bytes / channels; 1301da177e4SLinus Torvalds for (c = 0; c < channels; ++c) { 1311da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, ofs); 1321da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, transfer); 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds runtime->silence_filled += transfer; 1371da177e4SLinus Torvalds frames -= transfer; 1381da177e4SLinus Torvalds ofs = 0; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 142acb03d44SEliot Blennerhassett #ifdef CONFIG_SND_DEBUG 143acb03d44SEliot Blennerhassett void snd_pcm_debug_name(struct snd_pcm_substream *substream, 144c0070110STakashi Iwai char *name, size_t len) 1451da177e4SLinus Torvalds { 146c0070110STakashi Iwai snprintf(name, len, "pcmC%dD%d%c:%d", 1471da177e4SLinus Torvalds substream->pcm->card->number, 1481da177e4SLinus Torvalds substream->pcm->device, 149c0070110STakashi Iwai substream->stream ? 'c' : 'p', 150c0070110STakashi Iwai substream->number); 151c0070110STakashi Iwai } 152acb03d44SEliot Blennerhassett EXPORT_SYMBOL(snd_pcm_debug_name); 153acb03d44SEliot Blennerhassett #endif 154c0070110STakashi Iwai 1554d96eb25SJaroslav Kysela #define XRUN_DEBUG_BASIC (1<<0) 1564d96eb25SJaroslav Kysela #define XRUN_DEBUG_STACK (1<<1) /* dump also stack */ 1574d96eb25SJaroslav Kysela #define XRUN_DEBUG_JIFFIESCHECK (1<<2) /* do jiffies check */ 1584d96eb25SJaroslav Kysela 1594d96eb25SJaroslav Kysela #ifdef CONFIG_SND_PCM_XRUN_DEBUG 1604d96eb25SJaroslav Kysela 1614d96eb25SJaroslav Kysela #define xrun_debug(substream, mask) \ 1624d96eb25SJaroslav Kysela ((substream)->pstr->xrun_debug & (mask)) 1630f17014bSJarkko Nikula #else 1640f17014bSJarkko Nikula #define xrun_debug(substream, mask) 0 1650f17014bSJarkko Nikula #endif 1664d96eb25SJaroslav Kysela 1674d96eb25SJaroslav Kysela #define dump_stack_on_xrun(substream) do { \ 1684d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_STACK)) \ 1694d96eb25SJaroslav Kysela dump_stack(); \ 1704d96eb25SJaroslav Kysela } while (0) 1714d96eb25SJaroslav Kysela 1721da177e4SLinus Torvalds static void xrun(struct snd_pcm_substream *substream) 1731da177e4SLinus Torvalds { 17413f040f9SJaroslav Kysela struct snd_pcm_runtime *runtime = substream->runtime; 17513f040f9SJaroslav Kysela 176f5914908STakashi Iwai trace_xrun(substream); 17713f040f9SJaroslav Kysela if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) 17813f040f9SJaroslav Kysela snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp); 1791da177e4SLinus Torvalds snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); 180741b20cfSJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { 181c0070110STakashi Iwai char name[16]; 182acb03d44SEliot Blennerhassett snd_pcm_debug_name(substream, name, sizeof(name)); 18309e56df8STakashi Iwai pcm_warn(substream->pcm, "XRUN: %s\n", name); 184ed3da3d9STakashi Iwai dump_stack_on_xrun(substream); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1880f17014bSJarkko Nikula #ifdef CONFIG_SND_PCM_XRUN_DEBUG 189f5914908STakashi Iwai #define hw_ptr_error(substream, in_interrupt, reason, fmt, args...) \ 1904d96eb25SJaroslav Kysela do { \ 191f5914908STakashi Iwai trace_hw_ptr_error(substream, reason); \ 1924d96eb25SJaroslav Kysela if (xrun_debug(substream, XRUN_DEBUG_BASIC)) { \ 193f5914908STakashi Iwai pr_err_ratelimited("ALSA: PCM: [%c] " reason ": " fmt, \ 194f5914908STakashi Iwai (in_interrupt) ? 'Q' : 'P', ##args); \ 1954d96eb25SJaroslav Kysela dump_stack_on_xrun(substream); \ 1964d96eb25SJaroslav Kysela } \ 1974d96eb25SJaroslav Kysela } while (0) 1984d96eb25SJaroslav Kysela 1994d96eb25SJaroslav Kysela #else /* ! CONFIG_SND_PCM_XRUN_DEBUG */ 2004d96eb25SJaroslav Kysela 2014d96eb25SJaroslav Kysela #define hw_ptr_error(substream, fmt, args...) do { } while (0) 2024d96eb25SJaroslav Kysela 2034d96eb25SJaroslav Kysela #endif 2044d96eb25SJaroslav Kysela 2051250932eSJaroslav Kysela int snd_pcm_update_state(struct snd_pcm_substream *substream, 206877211f5STakashi Iwai struct snd_pcm_runtime *runtime) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds snd_pcm_uframes_t avail; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2111da177e4SLinus Torvalds avail = snd_pcm_playback_avail(runtime); 2121da177e4SLinus Torvalds else 2131da177e4SLinus Torvalds avail = snd_pcm_capture_avail(runtime); 2141da177e4SLinus Torvalds if (avail > runtime->avail_max) 2151da177e4SLinus Torvalds runtime->avail_max = avail; 2164cdc115fSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { 2174cdc115fSTakashi Iwai if (avail >= runtime->buffer_size) { 2181da177e4SLinus Torvalds snd_pcm_drain_done(substream); 2194cdc115fSTakashi Iwai return -EPIPE; 2204cdc115fSTakashi Iwai } 2214cdc115fSTakashi Iwai } else { 2224cdc115fSTakashi Iwai if (avail >= runtime->stop_threshold) { 2231da177e4SLinus Torvalds xrun(substream); 2241da177e4SLinus Torvalds return -EPIPE; 2251da177e4SLinus Torvalds } 2264cdc115fSTakashi Iwai } 2275daeba34SDavid Dillow if (runtime->twake) { 2285daeba34SDavid Dillow if (avail >= runtime->twake) 2295daeba34SDavid Dillow wake_up(&runtime->tsleep); 2305daeba34SDavid Dillow } else if (avail >= runtime->control->avail_min) 2315daeba34SDavid Dillow wake_up(&runtime->sleep); 2321da177e4SLinus Torvalds return 0; 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds 2353179f620SPierre-Louis Bossart static void update_audio_tstamp(struct snd_pcm_substream *substream, 2363179f620SPierre-Louis Bossart struct timespec *curr_tstamp, 2373179f620SPierre-Louis Bossart struct timespec *audio_tstamp) 2383179f620SPierre-Louis Bossart { 2393179f620SPierre-Louis Bossart struct snd_pcm_runtime *runtime = substream->runtime; 2403179f620SPierre-Louis Bossart u64 audio_frames, audio_nsecs; 2413179f620SPierre-Louis Bossart struct timespec driver_tstamp; 2423179f620SPierre-Louis Bossart 2433179f620SPierre-Louis Bossart if (runtime->tstamp_mode != SNDRV_PCM_TSTAMP_ENABLE) 2443179f620SPierre-Louis Bossart return; 2453179f620SPierre-Louis Bossart 2463179f620SPierre-Louis Bossart if (!(substream->ops->get_time_info) || 2473179f620SPierre-Louis Bossart (runtime->audio_tstamp_report.actual_type == 2483179f620SPierre-Louis Bossart SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { 2493179f620SPierre-Louis Bossart 2503179f620SPierre-Louis Bossart /* 2513179f620SPierre-Louis Bossart * provide audio timestamp derived from pointer position 2523179f620SPierre-Louis Bossart * add delay only if requested 2533179f620SPierre-Louis Bossart */ 2543179f620SPierre-Louis Bossart 2553179f620SPierre-Louis Bossart audio_frames = runtime->hw_ptr_wrap + runtime->status->hw_ptr; 2563179f620SPierre-Louis Bossart 2573179f620SPierre-Louis Bossart if (runtime->audio_tstamp_config.report_delay) { 2583179f620SPierre-Louis Bossart if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 2593179f620SPierre-Louis Bossart audio_frames -= runtime->delay; 2603179f620SPierre-Louis Bossart else 2613179f620SPierre-Louis Bossart audio_frames += runtime->delay; 2623179f620SPierre-Louis Bossart } 2633179f620SPierre-Louis Bossart audio_nsecs = div_u64(audio_frames * 1000000000LL, 2643179f620SPierre-Louis Bossart runtime->rate); 2653179f620SPierre-Louis Bossart *audio_tstamp = ns_to_timespec(audio_nsecs); 2663179f620SPierre-Louis Bossart } 2673179f620SPierre-Louis Bossart runtime->status->audio_tstamp = *audio_tstamp; 2683179f620SPierre-Louis Bossart runtime->status->tstamp = *curr_tstamp; 2693179f620SPierre-Louis Bossart 2703179f620SPierre-Louis Bossart /* 2713179f620SPierre-Louis Bossart * re-take a driver timestamp to let apps detect if the reference tstamp 2723179f620SPierre-Louis Bossart * read by low-level hardware was provided with a delay 2733179f620SPierre-Louis Bossart */ 2743179f620SPierre-Louis Bossart snd_pcm_gettime(substream->runtime, (struct timespec *)&driver_tstamp); 2753179f620SPierre-Louis Bossart runtime->driver_tstamp = driver_tstamp; 2763179f620SPierre-Louis Bossart } 2773179f620SPierre-Louis Bossart 278f240406bSJaroslav Kysela static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, 279f240406bSJaroslav Kysela unsigned int in_interrupt) 2801da177e4SLinus Torvalds { 281877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 2821da177e4SLinus Torvalds snd_pcm_uframes_t pos; 283f240406bSJaroslav Kysela snd_pcm_uframes_t old_hw_ptr, new_hw_ptr, hw_base; 284bbf6ad13SJaroslav Kysela snd_pcm_sframes_t hdelta, delta; 285bbf6ad13SJaroslav Kysela unsigned long jdelta; 2863509a03fSPierre-Louis Bossart unsigned long curr_jiffies; 2873509a03fSPierre-Louis Bossart struct timespec curr_tstamp; 2884eeaaeaeSPierre-Louis Bossart struct timespec audio_tstamp; 2890e8014d7SPierre-Louis Bossart int crossed_boundary = 0; 2901da177e4SLinus Torvalds 291bbf6ad13SJaroslav Kysela old_hw_ptr = runtime->status->hw_ptr; 2923509a03fSPierre-Louis Bossart 2933509a03fSPierre-Louis Bossart /* 2943509a03fSPierre-Louis Bossart * group pointer, time and jiffies reads to allow for more 2953509a03fSPierre-Louis Bossart * accurate correlations/corrections. 2963509a03fSPierre-Louis Bossart * The values are stored at the end of this routine after 2973509a03fSPierre-Louis Bossart * corrections for hw_ptr position 2983509a03fSPierre-Louis Bossart */ 299f240406bSJaroslav Kysela pos = substream->ops->pointer(substream); 3003509a03fSPierre-Louis Bossart curr_jiffies = jiffies; 3014eeaaeaeSPierre-Louis Bossart if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) { 3023179f620SPierre-Louis Bossart if ((substream->ops->get_time_info) && 3033179f620SPierre-Louis Bossart (runtime->audio_tstamp_config.type_requested != SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT)) { 3043179f620SPierre-Louis Bossart substream->ops->get_time_info(substream, &curr_tstamp, 3053179f620SPierre-Louis Bossart &audio_tstamp, 3063179f620SPierre-Louis Bossart &runtime->audio_tstamp_config, 3073179f620SPierre-Louis Bossart &runtime->audio_tstamp_report); 3083509a03fSPierre-Louis Bossart 3093179f620SPierre-Louis Bossart /* re-test in case tstamp type is not supported in hardware and was demoted to DEFAULT */ 3103179f620SPierre-Louis Bossart if (runtime->audio_tstamp_report.actual_type == SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT) 3113179f620SPierre-Louis Bossart snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); 3123179f620SPierre-Louis Bossart } else 3133179f620SPierre-Louis Bossart snd_pcm_gettime(runtime, (struct timespec *)&curr_tstamp); 3144eeaaeaeSPierre-Louis Bossart } 3154eeaaeaeSPierre-Louis Bossart 3161da177e4SLinus Torvalds if (pos == SNDRV_PCM_POS_XRUN) { 3171da177e4SLinus Torvalds xrun(substream); 3181da177e4SLinus Torvalds return -EPIPE; 3191da177e4SLinus Torvalds } 320f240406bSJaroslav Kysela if (pos >= runtime->buffer_size) { 32109e56df8STakashi Iwai if (printk_ratelimit()) { 322cedb8118STakashi Iwai char name[16]; 323acb03d44SEliot Blennerhassett snd_pcm_debug_name(substream, name, sizeof(name)); 32409e56df8STakashi Iwai pcm_err(substream->pcm, 3250ab1ace8STakashi Iwai "invalid position: %s, pos = %ld, buffer size = %ld, period size = %ld\n", 326f240406bSJaroslav Kysela name, pos, runtime->buffer_size, 327f240406bSJaroslav Kysela runtime->period_size); 328cedb8118STakashi Iwai } 329f240406bSJaroslav Kysela pos = 0; 330f240406bSJaroslav Kysela } 331f240406bSJaroslav Kysela pos -= pos % runtime->min_align; 332f5914908STakashi Iwai trace_hwptr(substream, pos, in_interrupt); 333ed3da3d9STakashi Iwai hw_base = runtime->hw_ptr_base; 334ed3da3d9STakashi Iwai new_hw_ptr = hw_base + pos; 335f240406bSJaroslav Kysela if (in_interrupt) { 336f240406bSJaroslav Kysela /* we know that one period was processed */ 337f240406bSJaroslav Kysela /* delta = "expected next hw_ptr" for in_interrupt != 0 */ 338e7636925SJaroslav Kysela delta = runtime->hw_ptr_interrupt + runtime->period_size; 339f240406bSJaroslav Kysela if (delta > new_hw_ptr) { 340bd76af0fSJaroslav Kysela /* check for double acknowledged interrupts */ 3413509a03fSPierre-Louis Bossart hdelta = curr_jiffies - runtime->hw_ptr_jiffies; 34213a98839SKoro Chen if (hdelta > runtime->hw_ptr_buffer_jiffies/2 + 1) { 343f240406bSJaroslav Kysela hw_base += runtime->buffer_size; 3440e8014d7SPierre-Louis Bossart if (hw_base >= runtime->boundary) { 345f240406bSJaroslav Kysela hw_base = 0; 3460e8014d7SPierre-Louis Bossart crossed_boundary++; 3470e8014d7SPierre-Louis Bossart } 348f240406bSJaroslav Kysela new_hw_ptr = hw_base + pos; 349f240406bSJaroslav Kysela goto __delta; 350ded652f7STakashi Iwai } 351f240406bSJaroslav Kysela } 352bd76af0fSJaroslav Kysela } 353f240406bSJaroslav Kysela /* new_hw_ptr might be lower than old_hw_ptr in case when */ 354f240406bSJaroslav Kysela /* pointer crosses the end of the ring buffer */ 355f240406bSJaroslav Kysela if (new_hw_ptr < old_hw_ptr) { 356ed3da3d9STakashi Iwai hw_base += runtime->buffer_size; 3570e8014d7SPierre-Louis Bossart if (hw_base >= runtime->boundary) { 358ed3da3d9STakashi Iwai hw_base = 0; 3590e8014d7SPierre-Louis Bossart crossed_boundary++; 3600e8014d7SPierre-Louis Bossart } 361ed3da3d9STakashi Iwai new_hw_ptr = hw_base + pos; 3621da177e4SLinus Torvalds } 363f240406bSJaroslav Kysela __delta: 364b406e610SClemens Ladisch delta = new_hw_ptr - old_hw_ptr; 365b406e610SClemens Ladisch if (delta < 0) 366b406e610SClemens Ladisch delta += runtime->boundary; 367ab69a490SClemens Ladisch 36859ff878fSClemens Ladisch if (runtime->no_period_wakeup) { 36912ff414eSKelly Anderson snd_pcm_sframes_t xrun_threshold; 37059ff878fSClemens Ladisch /* 37159ff878fSClemens Ladisch * Without regular period interrupts, we have to check 37259ff878fSClemens Ladisch * the elapsed time to detect xruns. 37359ff878fSClemens Ladisch */ 3743509a03fSPierre-Louis Bossart jdelta = curr_jiffies - runtime->hw_ptr_jiffies; 37547228e48SClemens Ladisch if (jdelta < runtime->hw_ptr_buffer_jiffies / 2) 37647228e48SClemens Ladisch goto no_delta_check; 37759ff878fSClemens Ladisch hdelta = jdelta - delta * HZ / runtime->rate; 37812ff414eSKelly Anderson xrun_threshold = runtime->hw_ptr_buffer_jiffies / 2 + 1; 37912ff414eSKelly Anderson while (hdelta > xrun_threshold) { 38059ff878fSClemens Ladisch delta += runtime->buffer_size; 38159ff878fSClemens Ladisch hw_base += runtime->buffer_size; 3820e8014d7SPierre-Louis Bossart if (hw_base >= runtime->boundary) { 38359ff878fSClemens Ladisch hw_base = 0; 3840e8014d7SPierre-Louis Bossart crossed_boundary++; 3850e8014d7SPierre-Louis Bossart } 38659ff878fSClemens Ladisch new_hw_ptr = hw_base + pos; 38759ff878fSClemens Ladisch hdelta -= runtime->hw_ptr_buffer_jiffies; 38859ff878fSClemens Ladisch } 389ab69a490SClemens Ladisch goto no_delta_check; 39059ff878fSClemens Ladisch } 391ab69a490SClemens Ladisch 392f240406bSJaroslav Kysela /* something must be really wrong */ 3937b3a177bSJaroslav Kysela if (delta >= runtime->buffer_size + runtime->period_size) { 394f5914908STakashi Iwai hw_ptr_error(substream, in_interrupt, "Unexpected hw_ptr", 395f5914908STakashi Iwai "(stream=%i, pos=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", 396f240406bSJaroslav Kysela substream->stream, (long)pos, 397f240406bSJaroslav Kysela (long)new_hw_ptr, (long)old_hw_ptr); 398f240406bSJaroslav Kysela return 0; 3991da177e4SLinus Torvalds } 400c87d9732STakashi Iwai 401c87d9732STakashi Iwai /* Do jiffies check only in xrun_debug mode */ 402741b20cfSJaroslav Kysela if (!xrun_debug(substream, XRUN_DEBUG_JIFFIESCHECK)) 403c87d9732STakashi Iwai goto no_jiffies_check; 404c87d9732STakashi Iwai 4053e5b5016STakashi Iwai /* Skip the jiffies check for hardwares with BATCH flag. 4063e5b5016STakashi Iwai * Such hardware usually just increases the position at each IRQ, 4073e5b5016STakashi Iwai * thus it can't give any strange position. 4083e5b5016STakashi Iwai */ 4093e5b5016STakashi Iwai if (runtime->hw.info & SNDRV_PCM_INFO_BATCH) 4103e5b5016STakashi Iwai goto no_jiffies_check; 411f240406bSJaroslav Kysela hdelta = delta; 412a4444da3SJaroslav Kysela if (hdelta < runtime->delay) 413a4444da3SJaroslav Kysela goto no_jiffies_check; 414a4444da3SJaroslav Kysela hdelta -= runtime->delay; 4153509a03fSPierre-Louis Bossart jdelta = curr_jiffies - runtime->hw_ptr_jiffies; 416bbf6ad13SJaroslav Kysela if (((hdelta * HZ) / runtime->rate) > jdelta + HZ/100) { 417bbf6ad13SJaroslav Kysela delta = jdelta / 418bbf6ad13SJaroslav Kysela (((runtime->period_size * HZ) / runtime->rate) 419bbf6ad13SJaroslav Kysela + HZ/100); 420f240406bSJaroslav Kysela /* move new_hw_ptr according jiffies not pos variable */ 421f240406bSJaroslav Kysela new_hw_ptr = old_hw_ptr; 422ed69c6a8SJaroslav Kysela hw_base = delta; 423f240406bSJaroslav Kysela /* use loop to avoid checks for delta overflows */ 424f240406bSJaroslav Kysela /* the delta value is small or zero in most cases */ 425f240406bSJaroslav Kysela while (delta > 0) { 426f240406bSJaroslav Kysela new_hw_ptr += runtime->period_size; 4270e8014d7SPierre-Louis Bossart if (new_hw_ptr >= runtime->boundary) { 428f240406bSJaroslav Kysela new_hw_ptr -= runtime->boundary; 4290e8014d7SPierre-Louis Bossart crossed_boundary--; 4300e8014d7SPierre-Louis Bossart } 431f240406bSJaroslav Kysela delta--; 432f240406bSJaroslav Kysela } 433f240406bSJaroslav Kysela /* align hw_base to buffer_size */ 434f5914908STakashi Iwai hw_ptr_error(substream, in_interrupt, "hw_ptr skipping", 435f5914908STakashi Iwai "(pos=%ld, delta=%ld, period=%ld, jdelta=%lu/%lu/%lu, hw_ptr=%ld/%ld)\n", 436bbf6ad13SJaroslav Kysela (long)pos, (long)hdelta, 437bbf6ad13SJaroslav Kysela (long)runtime->period_size, jdelta, 438ed69c6a8SJaroslav Kysela ((hdelta * HZ) / runtime->rate), hw_base, 439f240406bSJaroslav Kysela (unsigned long)old_hw_ptr, 440f240406bSJaroslav Kysela (unsigned long)new_hw_ptr); 441ed69c6a8SJaroslav Kysela /* reset values to proper state */ 442ed69c6a8SJaroslav Kysela delta = 0; 443ed69c6a8SJaroslav Kysela hw_base = new_hw_ptr - (new_hw_ptr % runtime->buffer_size); 444bbf6ad13SJaroslav Kysela } 4453e5b5016STakashi Iwai no_jiffies_check: 446bbf6ad13SJaroslav Kysela if (delta > runtime->period_size + runtime->period_size / 2) { 447f5914908STakashi Iwai hw_ptr_error(substream, in_interrupt, 448f5914908STakashi Iwai "Lost interrupts?", 449f5914908STakashi Iwai "(stream=%i, delta=%ld, new_hw_ptr=%ld, old_hw_ptr=%ld)\n", 450ed3da3d9STakashi Iwai substream->stream, (long)delta, 451f240406bSJaroslav Kysela (long)new_hw_ptr, 452f240406bSJaroslav Kysela (long)old_hw_ptr); 4531da177e4SLinus Torvalds } 454f240406bSJaroslav Kysela 455ab69a490SClemens Ladisch no_delta_check: 4563179f620SPierre-Louis Bossart if (runtime->status->hw_ptr == new_hw_ptr) { 4573179f620SPierre-Louis Bossart update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); 458f240406bSJaroslav Kysela return 0; 4593179f620SPierre-Louis Bossart } 460ab1863fcSTakashi Iwai 4611da177e4SLinus Torvalds if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && 4621da177e4SLinus Torvalds runtime->silence_size > 0) 4631da177e4SLinus Torvalds snd_pcm_playback_silence(substream, new_hw_ptr); 4641da177e4SLinus Torvalds 465e7636925SJaroslav Kysela if (in_interrupt) { 466ead4046bSClemens Ladisch delta = new_hw_ptr - runtime->hw_ptr_interrupt; 467ead4046bSClemens Ladisch if (delta < 0) 468ead4046bSClemens Ladisch delta += runtime->boundary; 469ead4046bSClemens Ladisch delta -= (snd_pcm_uframes_t)delta % runtime->period_size; 470ead4046bSClemens Ladisch runtime->hw_ptr_interrupt += delta; 471ead4046bSClemens Ladisch if (runtime->hw_ptr_interrupt >= runtime->boundary) 472ead4046bSClemens Ladisch runtime->hw_ptr_interrupt -= runtime->boundary; 473e7636925SJaroslav Kysela } 474ed3da3d9STakashi Iwai runtime->hw_ptr_base = hw_base; 4751da177e4SLinus Torvalds runtime->status->hw_ptr = new_hw_ptr; 4763509a03fSPierre-Louis Bossart runtime->hw_ptr_jiffies = curr_jiffies; 4770e8014d7SPierre-Louis Bossart if (crossed_boundary) { 4780e8014d7SPierre-Louis Bossart snd_BUG_ON(crossed_boundary != 1); 4790e8014d7SPierre-Louis Bossart runtime->hw_ptr_wrap += runtime->boundary; 4800e8014d7SPierre-Louis Bossart } 4811da177e4SLinus Torvalds 4823179f620SPierre-Louis Bossart update_audio_tstamp(substream, &curr_tstamp, &audio_tstamp); 4834eeaaeaeSPierre-Louis Bossart 4841250932eSJaroslav Kysela return snd_pcm_update_state(substream, runtime); 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds /* CAUTION: call it with irq disabled */ 488877211f5STakashi Iwai int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream) 4891da177e4SLinus Torvalds { 490f240406bSJaroslav Kysela return snd_pcm_update_hw_ptr0(substream, 0); 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /** 4941da177e4SLinus Torvalds * snd_pcm_set_ops - set the PCM operators 4951da177e4SLinus Torvalds * @pcm: the pcm instance 4961da177e4SLinus Torvalds * @direction: stream direction, SNDRV_PCM_STREAM_XXX 4971da177e4SLinus Torvalds * @ops: the operator table 4981da177e4SLinus Torvalds * 4991da177e4SLinus Torvalds * Sets the given PCM operators to the pcm instance. 5001da177e4SLinus Torvalds */ 501e6c2e7ebSLars-Peter Clausen void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, 502e6c2e7ebSLars-Peter Clausen const struct snd_pcm_ops *ops) 5031da177e4SLinus Torvalds { 504877211f5STakashi Iwai struct snd_pcm_str *stream = &pcm->streams[direction]; 505877211f5STakashi Iwai struct snd_pcm_substream *substream; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds for (substream = stream->substream; substream != NULL; substream = substream->next) 5081da177e4SLinus Torvalds substream->ops = ops; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 511e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_set_ops); 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds /** 5141da177e4SLinus Torvalds * snd_pcm_sync - set the PCM sync id 5151da177e4SLinus Torvalds * @substream: the pcm substream 5161da177e4SLinus Torvalds * 5171da177e4SLinus Torvalds * Sets the PCM sync identifier for the card. 5181da177e4SLinus Torvalds */ 519877211f5STakashi Iwai void snd_pcm_set_sync(struct snd_pcm_substream *substream) 5201da177e4SLinus Torvalds { 521877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds runtime->sync.id32[0] = substream->pcm->card->number; 5241da177e4SLinus Torvalds runtime->sync.id32[1] = -1; 5251da177e4SLinus Torvalds runtime->sync.id32[2] = -1; 5261da177e4SLinus Torvalds runtime->sync.id32[3] = -1; 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds 529e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_set_sync); 530e88e8ae6STakashi Iwai 5311da177e4SLinus Torvalds /* 5321da177e4SLinus Torvalds * Standard ioctl routine 5331da177e4SLinus Torvalds */ 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds static inline unsigned int div32(unsigned int a, unsigned int b, 5361da177e4SLinus Torvalds unsigned int *r) 5371da177e4SLinus Torvalds { 5381da177e4SLinus Torvalds if (b == 0) { 5391da177e4SLinus Torvalds *r = 0; 5401da177e4SLinus Torvalds return UINT_MAX; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds *r = a % b; 5431da177e4SLinus Torvalds return a / b; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 5461da177e4SLinus Torvalds static inline unsigned int div_down(unsigned int a, unsigned int b) 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds if (b == 0) 5491da177e4SLinus Torvalds return UINT_MAX; 5501da177e4SLinus Torvalds return a / b; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds static inline unsigned int div_up(unsigned int a, unsigned int b) 5541da177e4SLinus Torvalds { 5551da177e4SLinus Torvalds unsigned int r; 5561da177e4SLinus Torvalds unsigned int q; 5571da177e4SLinus Torvalds if (b == 0) 5581da177e4SLinus Torvalds return UINT_MAX; 5591da177e4SLinus Torvalds q = div32(a, b, &r); 5601da177e4SLinus Torvalds if (r) 5611da177e4SLinus Torvalds ++q; 5621da177e4SLinus Torvalds return q; 5631da177e4SLinus Torvalds } 5641da177e4SLinus Torvalds 5651da177e4SLinus Torvalds static inline unsigned int mul(unsigned int a, unsigned int b) 5661da177e4SLinus Torvalds { 5671da177e4SLinus Torvalds if (a == 0) 5681da177e4SLinus Torvalds return 0; 5691da177e4SLinus Torvalds if (div_down(UINT_MAX, a) < b) 5701da177e4SLinus Torvalds return UINT_MAX; 5711da177e4SLinus Torvalds return a * b; 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds static inline unsigned int muldiv32(unsigned int a, unsigned int b, 5751da177e4SLinus Torvalds unsigned int c, unsigned int *r) 5761da177e4SLinus Torvalds { 5771da177e4SLinus Torvalds u_int64_t n = (u_int64_t) a * b; 5781da177e4SLinus Torvalds if (c == 0) { 5797eaa943cSTakashi Iwai snd_BUG_ON(!n); 5801da177e4SLinus Torvalds *r = 0; 5811da177e4SLinus Torvalds return UINT_MAX; 5821da177e4SLinus Torvalds } 5833f7440a6STakashi Iwai n = div_u64_rem(n, c, r); 5841da177e4SLinus Torvalds if (n >= UINT_MAX) { 5851da177e4SLinus Torvalds *r = 0; 5861da177e4SLinus Torvalds return UINT_MAX; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds return n; 5891da177e4SLinus Torvalds } 5901da177e4SLinus Torvalds 5911da177e4SLinus Torvalds /** 5921da177e4SLinus Torvalds * snd_interval_refine - refine the interval value of configurator 5931da177e4SLinus Torvalds * @i: the interval value to refine 5941da177e4SLinus Torvalds * @v: the interval value to refer to 5951da177e4SLinus Torvalds * 5961da177e4SLinus Torvalds * Refines the interval value with the reference value. 5971da177e4SLinus Torvalds * The interval is changed to the range satisfying both intervals. 5981da177e4SLinus Torvalds * The interval status (min, max, integer, etc.) are evaluated. 5991da177e4SLinus Torvalds * 600eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 601eb7c06e8SYacine Belkadi * negative error code. 6021da177e4SLinus Torvalds */ 603877211f5STakashi Iwai int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v) 6041da177e4SLinus Torvalds { 6051da177e4SLinus Torvalds int changed = 0; 6067eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6077eaa943cSTakashi Iwai return -EINVAL; 6081da177e4SLinus Torvalds if (i->min < v->min) { 6091da177e4SLinus Torvalds i->min = v->min; 6101da177e4SLinus Torvalds i->openmin = v->openmin; 6111da177e4SLinus Torvalds changed = 1; 6121da177e4SLinus Torvalds } else if (i->min == v->min && !i->openmin && v->openmin) { 6131da177e4SLinus Torvalds i->openmin = 1; 6141da177e4SLinus Torvalds changed = 1; 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds if (i->max > v->max) { 6171da177e4SLinus Torvalds i->max = v->max; 6181da177e4SLinus Torvalds i->openmax = v->openmax; 6191da177e4SLinus Torvalds changed = 1; 6201da177e4SLinus Torvalds } else if (i->max == v->max && !i->openmax && v->openmax) { 6211da177e4SLinus Torvalds i->openmax = 1; 6221da177e4SLinus Torvalds changed = 1; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds if (!i->integer && v->integer) { 6251da177e4SLinus Torvalds i->integer = 1; 6261da177e4SLinus Torvalds changed = 1; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds if (i->integer) { 6291da177e4SLinus Torvalds if (i->openmin) { 6301da177e4SLinus Torvalds i->min++; 6311da177e4SLinus Torvalds i->openmin = 0; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds if (i->openmax) { 6341da177e4SLinus Torvalds i->max--; 6351da177e4SLinus Torvalds i->openmax = 0; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds } else if (!i->openmin && !i->openmax && i->min == i->max) 6381da177e4SLinus Torvalds i->integer = 1; 6391da177e4SLinus Torvalds if (snd_interval_checkempty(i)) { 6401da177e4SLinus Torvalds snd_interval_none(i); 6411da177e4SLinus Torvalds return -EINVAL; 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds return changed; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds 646e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_refine); 647e88e8ae6STakashi Iwai 648877211f5STakashi Iwai static int snd_interval_refine_first(struct snd_interval *i) 6491da177e4SLinus Torvalds { 6507eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6517eaa943cSTakashi Iwai return -EINVAL; 6521da177e4SLinus Torvalds if (snd_interval_single(i)) 6531da177e4SLinus Torvalds return 0; 6541da177e4SLinus Torvalds i->max = i->min; 6551da177e4SLinus Torvalds i->openmax = i->openmin; 6561da177e4SLinus Torvalds if (i->openmax) 6571da177e4SLinus Torvalds i->max++; 6581da177e4SLinus Torvalds return 1; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 661877211f5STakashi Iwai static int snd_interval_refine_last(struct snd_interval *i) 6621da177e4SLinus Torvalds { 6637eaa943cSTakashi Iwai if (snd_BUG_ON(snd_interval_empty(i))) 6647eaa943cSTakashi Iwai return -EINVAL; 6651da177e4SLinus Torvalds if (snd_interval_single(i)) 6661da177e4SLinus Torvalds return 0; 6671da177e4SLinus Torvalds i->min = i->max; 6681da177e4SLinus Torvalds i->openmin = i->openmax; 6691da177e4SLinus Torvalds if (i->openmin) 6701da177e4SLinus Torvalds i->min--; 6711da177e4SLinus Torvalds return 1; 6721da177e4SLinus Torvalds } 6731da177e4SLinus Torvalds 674877211f5STakashi Iwai void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) 6751da177e4SLinus Torvalds { 6761da177e4SLinus Torvalds if (a->empty || b->empty) { 6771da177e4SLinus Torvalds snd_interval_none(c); 6781da177e4SLinus Torvalds return; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds c->empty = 0; 6811da177e4SLinus Torvalds c->min = mul(a->min, b->min); 6821da177e4SLinus Torvalds c->openmin = (a->openmin || b->openmin); 6831da177e4SLinus Torvalds c->max = mul(a->max, b->max); 6841da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmax); 6851da177e4SLinus Torvalds c->integer = (a->integer && b->integer); 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 6881da177e4SLinus Torvalds /** 6891da177e4SLinus Torvalds * snd_interval_div - refine the interval value with division 690df8db936STakashi Iwai * @a: dividend 691df8db936STakashi Iwai * @b: divisor 692df8db936STakashi Iwai * @c: quotient 6931da177e4SLinus Torvalds * 6941da177e4SLinus Torvalds * c = a / b 6951da177e4SLinus Torvalds * 6961da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 6971da177e4SLinus Torvalds */ 698877211f5STakashi Iwai void snd_interval_div(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c) 6991da177e4SLinus Torvalds { 7001da177e4SLinus Torvalds unsigned int r; 7011da177e4SLinus Torvalds if (a->empty || b->empty) { 7021da177e4SLinus Torvalds snd_interval_none(c); 7031da177e4SLinus Torvalds return; 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds c->empty = 0; 7061da177e4SLinus Torvalds c->min = div32(a->min, b->max, &r); 7071da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmax); 7081da177e4SLinus Torvalds if (b->min > 0) { 7091da177e4SLinus Torvalds c->max = div32(a->max, b->min, &r); 7101da177e4SLinus Torvalds if (r) { 7111da177e4SLinus Torvalds c->max++; 7121da177e4SLinus Torvalds c->openmax = 1; 7131da177e4SLinus Torvalds } else 7141da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmin); 7151da177e4SLinus Torvalds } else { 7161da177e4SLinus Torvalds c->max = UINT_MAX; 7171da177e4SLinus Torvalds c->openmax = 0; 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds c->integer = 0; 7201da177e4SLinus Torvalds } 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds /** 7231da177e4SLinus Torvalds * snd_interval_muldivk - refine the interval value 724df8db936STakashi Iwai * @a: dividend 1 725df8db936STakashi Iwai * @b: dividend 2 726df8db936STakashi Iwai * @k: divisor (as integer) 727df8db936STakashi Iwai * @c: result 7281da177e4SLinus Torvalds * 7291da177e4SLinus Torvalds * c = a * b / k 7301da177e4SLinus Torvalds * 7311da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 7321da177e4SLinus Torvalds */ 733877211f5STakashi Iwai void snd_interval_muldivk(const struct snd_interval *a, const struct snd_interval *b, 734877211f5STakashi Iwai unsigned int k, struct snd_interval *c) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds unsigned int r; 7371da177e4SLinus Torvalds if (a->empty || b->empty) { 7381da177e4SLinus Torvalds snd_interval_none(c); 7391da177e4SLinus Torvalds return; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds c->empty = 0; 7421da177e4SLinus Torvalds c->min = muldiv32(a->min, b->min, k, &r); 7431da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmin); 7441da177e4SLinus Torvalds c->max = muldiv32(a->max, b->max, k, &r); 7451da177e4SLinus Torvalds if (r) { 7461da177e4SLinus Torvalds c->max++; 7471da177e4SLinus Torvalds c->openmax = 1; 7481da177e4SLinus Torvalds } else 7491da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmax); 7501da177e4SLinus Torvalds c->integer = 0; 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds /** 7541da177e4SLinus Torvalds * snd_interval_mulkdiv - refine the interval value 755df8db936STakashi Iwai * @a: dividend 1 756df8db936STakashi Iwai * @k: dividend 2 (as integer) 757df8db936STakashi Iwai * @b: divisor 758df8db936STakashi Iwai * @c: result 7591da177e4SLinus Torvalds * 7601da177e4SLinus Torvalds * c = a * k / b 7611da177e4SLinus Torvalds * 7621da177e4SLinus Torvalds * Returns non-zero if the value is changed, zero if not changed. 7631da177e4SLinus Torvalds */ 764877211f5STakashi Iwai void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k, 765877211f5STakashi Iwai const struct snd_interval *b, struct snd_interval *c) 7661da177e4SLinus Torvalds { 7671da177e4SLinus Torvalds unsigned int r; 7681da177e4SLinus Torvalds if (a->empty || b->empty) { 7691da177e4SLinus Torvalds snd_interval_none(c); 7701da177e4SLinus Torvalds return; 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds c->empty = 0; 7731da177e4SLinus Torvalds c->min = muldiv32(a->min, k, b->max, &r); 7741da177e4SLinus Torvalds c->openmin = (r || a->openmin || b->openmax); 7751da177e4SLinus Torvalds if (b->min > 0) { 7761da177e4SLinus Torvalds c->max = muldiv32(a->max, k, b->min, &r); 7771da177e4SLinus Torvalds if (r) { 7781da177e4SLinus Torvalds c->max++; 7791da177e4SLinus Torvalds c->openmax = 1; 7801da177e4SLinus Torvalds } else 7811da177e4SLinus Torvalds c->openmax = (a->openmax || b->openmin); 7821da177e4SLinus Torvalds } else { 7831da177e4SLinus Torvalds c->max = UINT_MAX; 7841da177e4SLinus Torvalds c->openmax = 0; 7851da177e4SLinus Torvalds } 7861da177e4SLinus Torvalds c->integer = 0; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds /* ---- */ 7901da177e4SLinus Torvalds 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds /** 7931da177e4SLinus Torvalds * snd_interval_ratnum - refine the interval value 794df8db936STakashi Iwai * @i: interval to refine 795df8db936STakashi Iwai * @rats_count: number of ratnum_t 796df8db936STakashi Iwai * @rats: ratnum_t array 797df8db936STakashi Iwai * @nump: pointer to store the resultant numerator 798df8db936STakashi Iwai * @denp: pointer to store the resultant denominator 7991da177e4SLinus Torvalds * 800eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 801eb7c06e8SYacine Belkadi * negative error code. 8021da177e4SLinus Torvalds */ 803877211f5STakashi Iwai int snd_interval_ratnum(struct snd_interval *i, 804e5e113cfSLars-Peter Clausen unsigned int rats_count, const struct snd_ratnum *rats, 8051da177e4SLinus Torvalds unsigned int *nump, unsigned int *denp) 8061da177e4SLinus Torvalds { 8078374e24cSKrzysztof Helt unsigned int best_num, best_den; 8088374e24cSKrzysztof Helt int best_diff; 8091da177e4SLinus Torvalds unsigned int k; 810877211f5STakashi Iwai struct snd_interval t; 8111da177e4SLinus Torvalds int err; 8128374e24cSKrzysztof Helt unsigned int result_num, result_den; 8138374e24cSKrzysztof Helt int result_diff; 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 8161da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 8171da177e4SLinus Torvalds unsigned int num = rats[k].num; 8181da177e4SLinus Torvalds unsigned int den; 8191da177e4SLinus Torvalds unsigned int q = i->min; 8201da177e4SLinus Torvalds int diff; 8211da177e4SLinus Torvalds if (q == 0) 8221da177e4SLinus Torvalds q = 1; 82340962d7cSKrzysztof Helt den = div_up(num, q); 8241da177e4SLinus Torvalds if (den < rats[k].den_min) 8251da177e4SLinus Torvalds continue; 8261da177e4SLinus Torvalds if (den > rats[k].den_max) 8271da177e4SLinus Torvalds den = rats[k].den_max; 8281da177e4SLinus Torvalds else { 8291da177e4SLinus Torvalds unsigned int r; 8301da177e4SLinus Torvalds r = (den - rats[k].den_min) % rats[k].den_step; 8311da177e4SLinus Torvalds if (r != 0) 8321da177e4SLinus Torvalds den -= r; 8331da177e4SLinus Torvalds } 8341da177e4SLinus Torvalds diff = num - q * den; 8358374e24cSKrzysztof Helt if (diff < 0) 8368374e24cSKrzysztof Helt diff = -diff; 8371da177e4SLinus Torvalds if (best_num == 0 || 8381da177e4SLinus Torvalds diff * best_den < best_diff * den) { 8391da177e4SLinus Torvalds best_diff = diff; 8401da177e4SLinus Torvalds best_den = den; 8411da177e4SLinus Torvalds best_num = num; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds } 8441da177e4SLinus Torvalds if (best_den == 0) { 8451da177e4SLinus Torvalds i->empty = 1; 8461da177e4SLinus Torvalds return -EINVAL; 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds t.min = div_down(best_num, best_den); 8491da177e4SLinus Torvalds t.openmin = !!(best_num % best_den); 8501da177e4SLinus Torvalds 8518374e24cSKrzysztof Helt result_num = best_num; 8528374e24cSKrzysztof Helt result_diff = best_diff; 8538374e24cSKrzysztof Helt result_den = best_den; 8541da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 8551da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 8561da177e4SLinus Torvalds unsigned int num = rats[k].num; 8571da177e4SLinus Torvalds unsigned int den; 8581da177e4SLinus Torvalds unsigned int q = i->max; 8591da177e4SLinus Torvalds int diff; 8601da177e4SLinus Torvalds if (q == 0) { 8611da177e4SLinus Torvalds i->empty = 1; 8621da177e4SLinus Torvalds return -EINVAL; 8631da177e4SLinus Torvalds } 86440962d7cSKrzysztof Helt den = div_down(num, q); 8651da177e4SLinus Torvalds if (den > rats[k].den_max) 8661da177e4SLinus Torvalds continue; 8671da177e4SLinus Torvalds if (den < rats[k].den_min) 8681da177e4SLinus Torvalds den = rats[k].den_min; 8691da177e4SLinus Torvalds else { 8701da177e4SLinus Torvalds unsigned int r; 8711da177e4SLinus Torvalds r = (den - rats[k].den_min) % rats[k].den_step; 8721da177e4SLinus Torvalds if (r != 0) 8731da177e4SLinus Torvalds den += rats[k].den_step - r; 8741da177e4SLinus Torvalds } 8751da177e4SLinus Torvalds diff = q * den - num; 8768374e24cSKrzysztof Helt if (diff < 0) 8778374e24cSKrzysztof Helt diff = -diff; 8781da177e4SLinus Torvalds if (best_num == 0 || 8791da177e4SLinus Torvalds diff * best_den < best_diff * den) { 8801da177e4SLinus Torvalds best_diff = diff; 8811da177e4SLinus Torvalds best_den = den; 8821da177e4SLinus Torvalds best_num = num; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds } 8851da177e4SLinus Torvalds if (best_den == 0) { 8861da177e4SLinus Torvalds i->empty = 1; 8871da177e4SLinus Torvalds return -EINVAL; 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds t.max = div_up(best_num, best_den); 8901da177e4SLinus Torvalds t.openmax = !!(best_num % best_den); 8911da177e4SLinus Torvalds t.integer = 0; 8921da177e4SLinus Torvalds err = snd_interval_refine(i, &t); 8931da177e4SLinus Torvalds if (err < 0) 8941da177e4SLinus Torvalds return err; 8951da177e4SLinus Torvalds 8961da177e4SLinus Torvalds if (snd_interval_single(i)) { 8978374e24cSKrzysztof Helt if (best_diff * result_den < result_diff * best_den) { 8988374e24cSKrzysztof Helt result_num = best_num; 8998374e24cSKrzysztof Helt result_den = best_den; 9008374e24cSKrzysztof Helt } 9011da177e4SLinus Torvalds if (nump) 9028374e24cSKrzysztof Helt *nump = result_num; 9031da177e4SLinus Torvalds if (denp) 9048374e24cSKrzysztof Helt *denp = result_den; 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds return err; 9071da177e4SLinus Torvalds } 9081da177e4SLinus Torvalds 909e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_ratnum); 910e88e8ae6STakashi Iwai 9111da177e4SLinus Torvalds /** 9121da177e4SLinus Torvalds * snd_interval_ratden - refine the interval value 913df8db936STakashi Iwai * @i: interval to refine 914877211f5STakashi Iwai * @rats_count: number of struct ratden 915877211f5STakashi Iwai * @rats: struct ratden array 916df8db936STakashi Iwai * @nump: pointer to store the resultant numerator 917df8db936STakashi Iwai * @denp: pointer to store the resultant denominator 9181da177e4SLinus Torvalds * 919eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 920eb7c06e8SYacine Belkadi * negative error code. 9211da177e4SLinus Torvalds */ 922877211f5STakashi Iwai static int snd_interval_ratden(struct snd_interval *i, 923e5e113cfSLars-Peter Clausen unsigned int rats_count, 924e5e113cfSLars-Peter Clausen const struct snd_ratden *rats, 9251da177e4SLinus Torvalds unsigned int *nump, unsigned int *denp) 9261da177e4SLinus Torvalds { 9271da177e4SLinus Torvalds unsigned int best_num, best_diff, best_den; 9281da177e4SLinus Torvalds unsigned int k; 929877211f5STakashi Iwai struct snd_interval t; 9301da177e4SLinus Torvalds int err; 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 9331da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 9341da177e4SLinus Torvalds unsigned int num; 9351da177e4SLinus Torvalds unsigned int den = rats[k].den; 9361da177e4SLinus Torvalds unsigned int q = i->min; 9371da177e4SLinus Torvalds int diff; 9381da177e4SLinus Torvalds num = mul(q, den); 9391da177e4SLinus Torvalds if (num > rats[k].num_max) 9401da177e4SLinus Torvalds continue; 9411da177e4SLinus Torvalds if (num < rats[k].num_min) 9421da177e4SLinus Torvalds num = rats[k].num_max; 9431da177e4SLinus Torvalds else { 9441da177e4SLinus Torvalds unsigned int r; 9451da177e4SLinus Torvalds r = (num - rats[k].num_min) % rats[k].num_step; 9461da177e4SLinus Torvalds if (r != 0) 9471da177e4SLinus Torvalds num += rats[k].num_step - r; 9481da177e4SLinus Torvalds } 9491da177e4SLinus Torvalds diff = num - q * den; 9501da177e4SLinus Torvalds if (best_num == 0 || 9511da177e4SLinus Torvalds diff * best_den < best_diff * den) { 9521da177e4SLinus Torvalds best_diff = diff; 9531da177e4SLinus Torvalds best_den = den; 9541da177e4SLinus Torvalds best_num = num; 9551da177e4SLinus Torvalds } 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds if (best_den == 0) { 9581da177e4SLinus Torvalds i->empty = 1; 9591da177e4SLinus Torvalds return -EINVAL; 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds t.min = div_down(best_num, best_den); 9621da177e4SLinus Torvalds t.openmin = !!(best_num % best_den); 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds best_num = best_den = best_diff = 0; 9651da177e4SLinus Torvalds for (k = 0; k < rats_count; ++k) { 9661da177e4SLinus Torvalds unsigned int num; 9671da177e4SLinus Torvalds unsigned int den = rats[k].den; 9681da177e4SLinus Torvalds unsigned int q = i->max; 9691da177e4SLinus Torvalds int diff; 9701da177e4SLinus Torvalds num = mul(q, den); 9711da177e4SLinus Torvalds if (num < rats[k].num_min) 9721da177e4SLinus Torvalds continue; 9731da177e4SLinus Torvalds if (num > rats[k].num_max) 9741da177e4SLinus Torvalds num = rats[k].num_max; 9751da177e4SLinus Torvalds else { 9761da177e4SLinus Torvalds unsigned int r; 9771da177e4SLinus Torvalds r = (num - rats[k].num_min) % rats[k].num_step; 9781da177e4SLinus Torvalds if (r != 0) 9791da177e4SLinus Torvalds num -= r; 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds diff = q * den - num; 9821da177e4SLinus Torvalds if (best_num == 0 || 9831da177e4SLinus Torvalds diff * best_den < best_diff * den) { 9841da177e4SLinus Torvalds best_diff = diff; 9851da177e4SLinus Torvalds best_den = den; 9861da177e4SLinus Torvalds best_num = num; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds if (best_den == 0) { 9901da177e4SLinus Torvalds i->empty = 1; 9911da177e4SLinus Torvalds return -EINVAL; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds t.max = div_up(best_num, best_den); 9941da177e4SLinus Torvalds t.openmax = !!(best_num % best_den); 9951da177e4SLinus Torvalds t.integer = 0; 9961da177e4SLinus Torvalds err = snd_interval_refine(i, &t); 9971da177e4SLinus Torvalds if (err < 0) 9981da177e4SLinus Torvalds return err; 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds if (snd_interval_single(i)) { 10011da177e4SLinus Torvalds if (nump) 10021da177e4SLinus Torvalds *nump = best_num; 10031da177e4SLinus Torvalds if (denp) 10041da177e4SLinus Torvalds *denp = best_den; 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds return err; 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds /** 10101da177e4SLinus Torvalds * snd_interval_list - refine the interval value from the list 10111da177e4SLinus Torvalds * @i: the interval value to refine 10121da177e4SLinus Torvalds * @count: the number of elements in the list 10131da177e4SLinus Torvalds * @list: the value list 10141da177e4SLinus Torvalds * @mask: the bit-mask to evaluate 10151da177e4SLinus Torvalds * 10161da177e4SLinus Torvalds * Refines the interval value from the list. 10171da177e4SLinus Torvalds * When mask is non-zero, only the elements corresponding to bit 1 are 10181da177e4SLinus Torvalds * evaluated. 10191da177e4SLinus Torvalds * 1020eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 1021eb7c06e8SYacine Belkadi * negative error code. 10221da177e4SLinus Torvalds */ 10234af87a93SMark Brown int snd_interval_list(struct snd_interval *i, unsigned int count, 10244af87a93SMark Brown const unsigned int *list, unsigned int mask) 10251da177e4SLinus Torvalds { 10261da177e4SLinus Torvalds unsigned int k; 1027b1ddaf68SClemens Ladisch struct snd_interval list_range; 10280981a260STakashi Iwai 10290981a260STakashi Iwai if (!count) { 10300981a260STakashi Iwai i->empty = 1; 10310981a260STakashi Iwai return -EINVAL; 10320981a260STakashi Iwai } 1033b1ddaf68SClemens Ladisch snd_interval_any(&list_range); 1034b1ddaf68SClemens Ladisch list_range.min = UINT_MAX; 1035b1ddaf68SClemens Ladisch list_range.max = 0; 10361da177e4SLinus Torvalds for (k = 0; k < count; k++) { 10371da177e4SLinus Torvalds if (mask && !(mask & (1 << k))) 10381da177e4SLinus Torvalds continue; 1039b1ddaf68SClemens Ladisch if (!snd_interval_test(i, list[k])) 10401da177e4SLinus Torvalds continue; 1041b1ddaf68SClemens Ladisch list_range.min = min(list_range.min, list[k]); 1042b1ddaf68SClemens Ladisch list_range.max = max(list_range.max, list[k]); 10431da177e4SLinus Torvalds } 1044b1ddaf68SClemens Ladisch return snd_interval_refine(i, &list_range); 10451da177e4SLinus Torvalds } 10461da177e4SLinus Torvalds 1047e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_interval_list); 1048e88e8ae6STakashi Iwai 1049f66f898eSPeter Rosin /** 1050f66f898eSPeter Rosin * snd_interval_ranges - refine the interval value from the list of ranges 1051f66f898eSPeter Rosin * @i: the interval value to refine 1052f66f898eSPeter Rosin * @count: the number of elements in the list of ranges 1053f66f898eSPeter Rosin * @ranges: the ranges list 1054f66f898eSPeter Rosin * @mask: the bit-mask to evaluate 1055f66f898eSPeter Rosin * 1056f66f898eSPeter Rosin * Refines the interval value from the list of ranges. 1057f66f898eSPeter Rosin * When mask is non-zero, only the elements corresponding to bit 1 are 1058f66f898eSPeter Rosin * evaluated. 1059f66f898eSPeter Rosin * 1060f66f898eSPeter Rosin * Return: Positive if the value is changed, zero if it's not changed, or a 1061f66f898eSPeter Rosin * negative error code. 1062f66f898eSPeter Rosin */ 1063f66f898eSPeter Rosin int snd_interval_ranges(struct snd_interval *i, unsigned int count, 1064f66f898eSPeter Rosin const struct snd_interval *ranges, unsigned int mask) 1065f66f898eSPeter Rosin { 1066f66f898eSPeter Rosin unsigned int k; 1067f66f898eSPeter Rosin struct snd_interval range_union; 1068f66f898eSPeter Rosin struct snd_interval range; 1069f66f898eSPeter Rosin 1070f66f898eSPeter Rosin if (!count) { 1071f66f898eSPeter Rosin snd_interval_none(i); 1072f66f898eSPeter Rosin return -EINVAL; 1073f66f898eSPeter Rosin } 1074f66f898eSPeter Rosin snd_interval_any(&range_union); 1075f66f898eSPeter Rosin range_union.min = UINT_MAX; 1076f66f898eSPeter Rosin range_union.max = 0; 1077f66f898eSPeter Rosin for (k = 0; k < count; k++) { 1078f66f898eSPeter Rosin if (mask && !(mask & (1 << k))) 1079f66f898eSPeter Rosin continue; 1080f66f898eSPeter Rosin snd_interval_copy(&range, &ranges[k]); 1081f66f898eSPeter Rosin if (snd_interval_refine(&range, i) < 0) 1082f66f898eSPeter Rosin continue; 1083f66f898eSPeter Rosin if (snd_interval_empty(&range)) 1084f66f898eSPeter Rosin continue; 1085f66f898eSPeter Rosin 1086f66f898eSPeter Rosin if (range.min < range_union.min) { 1087f66f898eSPeter Rosin range_union.min = range.min; 1088f66f898eSPeter Rosin range_union.openmin = 1; 1089f66f898eSPeter Rosin } 1090f66f898eSPeter Rosin if (range.min == range_union.min && !range.openmin) 1091f66f898eSPeter Rosin range_union.openmin = 0; 1092f66f898eSPeter Rosin if (range.max > range_union.max) { 1093f66f898eSPeter Rosin range_union.max = range.max; 1094f66f898eSPeter Rosin range_union.openmax = 1; 1095f66f898eSPeter Rosin } 1096f66f898eSPeter Rosin if (range.max == range_union.max && !range.openmax) 1097f66f898eSPeter Rosin range_union.openmax = 0; 1098f66f898eSPeter Rosin } 1099f66f898eSPeter Rosin return snd_interval_refine(i, &range_union); 1100f66f898eSPeter Rosin } 1101f66f898eSPeter Rosin EXPORT_SYMBOL(snd_interval_ranges); 1102f66f898eSPeter Rosin 11030f519b62SClemens Ladisch static int snd_interval_step(struct snd_interval *i, unsigned int step) 11041da177e4SLinus Torvalds { 11051da177e4SLinus Torvalds unsigned int n; 11061da177e4SLinus Torvalds int changed = 0; 11070f519b62SClemens Ladisch n = i->min % step; 11081da177e4SLinus Torvalds if (n != 0 || i->openmin) { 11091da177e4SLinus Torvalds i->min += step - n; 1110df1e4719SClemens Ladisch i->openmin = 0; 11111da177e4SLinus Torvalds changed = 1; 11121da177e4SLinus Torvalds } 11130f519b62SClemens Ladisch n = i->max % step; 11141da177e4SLinus Torvalds if (n != 0 || i->openmax) { 11151da177e4SLinus Torvalds i->max -= n; 1116df1e4719SClemens Ladisch i->openmax = 0; 11171da177e4SLinus Torvalds changed = 1; 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds if (snd_interval_checkempty(i)) { 11201da177e4SLinus Torvalds i->empty = 1; 11211da177e4SLinus Torvalds return -EINVAL; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds return changed; 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds /* Info constraints helpers */ 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds /** 11291da177e4SLinus Torvalds * snd_pcm_hw_rule_add - add the hw-constraint rule 11301da177e4SLinus Torvalds * @runtime: the pcm runtime instance 11311da177e4SLinus Torvalds * @cond: condition bits 11321da177e4SLinus Torvalds * @var: the variable to evaluate 11331da177e4SLinus Torvalds * @func: the evaluation function 11341da177e4SLinus Torvalds * @private: the private data pointer passed to function 11351da177e4SLinus Torvalds * @dep: the dependent variables 11361da177e4SLinus Torvalds * 1137eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 11381da177e4SLinus Torvalds */ 1139877211f5STakashi Iwai int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond, 11401da177e4SLinus Torvalds int var, 11411da177e4SLinus Torvalds snd_pcm_hw_rule_func_t func, void *private, 11421da177e4SLinus Torvalds int dep, ...) 11431da177e4SLinus Torvalds { 1144877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1145877211f5STakashi Iwai struct snd_pcm_hw_rule *c; 11461da177e4SLinus Torvalds unsigned int k; 11471da177e4SLinus Torvalds va_list args; 11481da177e4SLinus Torvalds va_start(args, dep); 11491da177e4SLinus Torvalds if (constrs->rules_num >= constrs->rules_all) { 1150877211f5STakashi Iwai struct snd_pcm_hw_rule *new; 11511da177e4SLinus Torvalds unsigned int new_rules = constrs->rules_all + 16; 11521da177e4SLinus Torvalds new = kcalloc(new_rules, sizeof(*c), GFP_KERNEL); 115387a1c8aaSJesper Juhl if (!new) { 115487a1c8aaSJesper Juhl va_end(args); 11551da177e4SLinus Torvalds return -ENOMEM; 115687a1c8aaSJesper Juhl } 11571da177e4SLinus Torvalds if (constrs->rules) { 11581da177e4SLinus Torvalds memcpy(new, constrs->rules, 11591da177e4SLinus Torvalds constrs->rules_num * sizeof(*c)); 11601da177e4SLinus Torvalds kfree(constrs->rules); 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds constrs->rules = new; 11631da177e4SLinus Torvalds constrs->rules_all = new_rules; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds c = &constrs->rules[constrs->rules_num]; 11661da177e4SLinus Torvalds c->cond = cond; 11671da177e4SLinus Torvalds c->func = func; 11681da177e4SLinus Torvalds c->var = var; 11691da177e4SLinus Torvalds c->private = private; 11701da177e4SLinus Torvalds k = 0; 11711da177e4SLinus Torvalds while (1) { 117287a1c8aaSJesper Juhl if (snd_BUG_ON(k >= ARRAY_SIZE(c->deps))) { 117387a1c8aaSJesper Juhl va_end(args); 11747eaa943cSTakashi Iwai return -EINVAL; 117587a1c8aaSJesper Juhl } 11761da177e4SLinus Torvalds c->deps[k++] = dep; 11771da177e4SLinus Torvalds if (dep < 0) 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds dep = va_arg(args, int); 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds constrs->rules_num++; 11821da177e4SLinus Torvalds va_end(args); 11831da177e4SLinus Torvalds return 0; 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 1186e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_rule_add); 1187e88e8ae6STakashi Iwai 11881da177e4SLinus Torvalds /** 11891c85cc64SRandy Dunlap * snd_pcm_hw_constraint_mask - apply the given bitmap mask constraint 1190df8db936STakashi Iwai * @runtime: PCM runtime instance 1191df8db936STakashi Iwai * @var: hw_params variable to apply the mask 1192df8db936STakashi Iwai * @mask: the bitmap mask 1193df8db936STakashi Iwai * 11941c85cc64SRandy Dunlap * Apply the constraint of the given bitmap mask to a 32-bit mask parameter. 1195eb7c06e8SYacine Belkadi * 1196eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 11971da177e4SLinus Torvalds */ 1198877211f5STakashi Iwai int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 11991da177e4SLinus Torvalds u_int32_t mask) 12001da177e4SLinus Torvalds { 1201877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1202877211f5STakashi Iwai struct snd_mask *maskp = constrs_mask(constrs, var); 12031da177e4SLinus Torvalds *maskp->bits &= mask; 12041da177e4SLinus Torvalds memset(maskp->bits + 1, 0, (SNDRV_MASK_MAX-32) / 8); /* clear rest */ 12051da177e4SLinus Torvalds if (*maskp->bits == 0) 12061da177e4SLinus Torvalds return -EINVAL; 12071da177e4SLinus Torvalds return 0; 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds /** 12111c85cc64SRandy Dunlap * snd_pcm_hw_constraint_mask64 - apply the given bitmap mask constraint 1212df8db936STakashi Iwai * @runtime: PCM runtime instance 1213df8db936STakashi Iwai * @var: hw_params variable to apply the mask 1214df8db936STakashi Iwai * @mask: the 64bit bitmap mask 1215df8db936STakashi Iwai * 12161c85cc64SRandy Dunlap * Apply the constraint of the given bitmap mask to a 64-bit mask parameter. 1217eb7c06e8SYacine Belkadi * 1218eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 12191da177e4SLinus Torvalds */ 1220877211f5STakashi Iwai int snd_pcm_hw_constraint_mask64(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 12211da177e4SLinus Torvalds u_int64_t mask) 12221da177e4SLinus Torvalds { 1223877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1224877211f5STakashi Iwai struct snd_mask *maskp = constrs_mask(constrs, var); 12251da177e4SLinus Torvalds maskp->bits[0] &= (u_int32_t)mask; 12261da177e4SLinus Torvalds maskp->bits[1] &= (u_int32_t)(mask >> 32); 12271da177e4SLinus Torvalds memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */ 12281da177e4SLinus Torvalds if (! maskp->bits[0] && ! maskp->bits[1]) 12291da177e4SLinus Torvalds return -EINVAL; 12301da177e4SLinus Torvalds return 0; 12311da177e4SLinus Torvalds } 123263a5d4c6SMark Brown EXPORT_SYMBOL(snd_pcm_hw_constraint_mask64); 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds /** 12351c85cc64SRandy Dunlap * snd_pcm_hw_constraint_integer - apply an integer constraint to an interval 1236df8db936STakashi Iwai * @runtime: PCM runtime instance 1237df8db936STakashi Iwai * @var: hw_params variable to apply the integer constraint 1238df8db936STakashi Iwai * 1239df8db936STakashi Iwai * Apply the constraint of integer to an interval parameter. 1240eb7c06e8SYacine Belkadi * 1241eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 1242eb7c06e8SYacine Belkadi * negative error code. 12431da177e4SLinus Torvalds */ 1244877211f5STakashi Iwai int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var) 12451da177e4SLinus Torvalds { 1246877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 12471da177e4SLinus Torvalds return snd_interval_setinteger(constrs_interval(constrs, var)); 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 1250e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_integer); 1251e88e8ae6STakashi Iwai 12521da177e4SLinus Torvalds /** 12531c85cc64SRandy Dunlap * snd_pcm_hw_constraint_minmax - apply a min/max range constraint to an interval 1254df8db936STakashi Iwai * @runtime: PCM runtime instance 1255df8db936STakashi Iwai * @var: hw_params variable to apply the range 1256df8db936STakashi Iwai * @min: the minimal value 1257df8db936STakashi Iwai * @max: the maximal value 1258df8db936STakashi Iwai * 1259df8db936STakashi Iwai * Apply the min/max range constraint to an interval parameter. 1260eb7c06e8SYacine Belkadi * 1261eb7c06e8SYacine Belkadi * Return: Positive if the value is changed, zero if it's not changed, or a 1262eb7c06e8SYacine Belkadi * negative error code. 12631da177e4SLinus Torvalds */ 1264877211f5STakashi Iwai int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_param_t var, 12651da177e4SLinus Torvalds unsigned int min, unsigned int max) 12661da177e4SLinus Torvalds { 1267877211f5STakashi Iwai struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints; 1268877211f5STakashi Iwai struct snd_interval t; 12691da177e4SLinus Torvalds t.min = min; 12701da177e4SLinus Torvalds t.max = max; 12711da177e4SLinus Torvalds t.openmin = t.openmax = 0; 12721da177e4SLinus Torvalds t.integer = 0; 12731da177e4SLinus Torvalds return snd_interval_refine(constrs_interval(constrs, var), &t); 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 1276e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax); 1277e88e8ae6STakashi Iwai 1278877211f5STakashi Iwai static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params, 1279877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 12801da177e4SLinus Torvalds { 1281877211f5STakashi Iwai struct snd_pcm_hw_constraint_list *list = rule->private; 12821da177e4SLinus Torvalds return snd_interval_list(hw_param_interval(params, rule->var), list->count, list->list, list->mask); 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds /** 12871c85cc64SRandy Dunlap * snd_pcm_hw_constraint_list - apply a list of constraints to a parameter 1288df8db936STakashi Iwai * @runtime: PCM runtime instance 1289df8db936STakashi Iwai * @cond: condition bits 1290df8db936STakashi Iwai * @var: hw_params variable to apply the list constraint 1291df8db936STakashi Iwai * @l: list 1292df8db936STakashi Iwai * 1293df8db936STakashi Iwai * Apply the list of constraints to an interval parameter. 1294eb7c06e8SYacine Belkadi * 1295eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 12961da177e4SLinus Torvalds */ 1297877211f5STakashi Iwai int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime, 12981da177e4SLinus Torvalds unsigned int cond, 12991da177e4SLinus Torvalds snd_pcm_hw_param_t var, 13001464189fSMark Brown const struct snd_pcm_hw_constraint_list *l) 13011da177e4SLinus Torvalds { 13021da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 13031464189fSMark Brown snd_pcm_hw_rule_list, (void *)l, 13041da177e4SLinus Torvalds var, -1); 13051da177e4SLinus Torvalds } 13061da177e4SLinus Torvalds 1307e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_list); 1308e88e8ae6STakashi Iwai 1309f66f898eSPeter Rosin static int snd_pcm_hw_rule_ranges(struct snd_pcm_hw_params *params, 1310f66f898eSPeter Rosin struct snd_pcm_hw_rule *rule) 1311f66f898eSPeter Rosin { 1312f66f898eSPeter Rosin struct snd_pcm_hw_constraint_ranges *r = rule->private; 1313f66f898eSPeter Rosin return snd_interval_ranges(hw_param_interval(params, rule->var), 1314f66f898eSPeter Rosin r->count, r->ranges, r->mask); 1315f66f898eSPeter Rosin } 1316f66f898eSPeter Rosin 1317f66f898eSPeter Rosin 1318f66f898eSPeter Rosin /** 1319f66f898eSPeter Rosin * snd_pcm_hw_constraint_ranges - apply list of range constraints to a parameter 1320f66f898eSPeter Rosin * @runtime: PCM runtime instance 1321f66f898eSPeter Rosin * @cond: condition bits 1322f66f898eSPeter Rosin * @var: hw_params variable to apply the list of range constraints 1323f66f898eSPeter Rosin * @r: ranges 1324f66f898eSPeter Rosin * 1325f66f898eSPeter Rosin * Apply the list of range constraints to an interval parameter. 1326f66f898eSPeter Rosin * 1327f66f898eSPeter Rosin * Return: Zero if successful, or a negative error code on failure. 1328f66f898eSPeter Rosin */ 1329f66f898eSPeter Rosin int snd_pcm_hw_constraint_ranges(struct snd_pcm_runtime *runtime, 1330f66f898eSPeter Rosin unsigned int cond, 1331f66f898eSPeter Rosin snd_pcm_hw_param_t var, 1332f66f898eSPeter Rosin const struct snd_pcm_hw_constraint_ranges *r) 1333f66f898eSPeter Rosin { 1334f66f898eSPeter Rosin return snd_pcm_hw_rule_add(runtime, cond, var, 1335f66f898eSPeter Rosin snd_pcm_hw_rule_ranges, (void *)r, 1336f66f898eSPeter Rosin var, -1); 1337f66f898eSPeter Rosin } 1338f66f898eSPeter Rosin EXPORT_SYMBOL(snd_pcm_hw_constraint_ranges); 1339f66f898eSPeter Rosin 1340877211f5STakashi Iwai static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params, 1341877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 13421da177e4SLinus Torvalds { 1343e5e113cfSLars-Peter Clausen const struct snd_pcm_hw_constraint_ratnums *r = rule->private; 13441da177e4SLinus Torvalds unsigned int num = 0, den = 0; 13451da177e4SLinus Torvalds int err; 13461da177e4SLinus Torvalds err = snd_interval_ratnum(hw_param_interval(params, rule->var), 13471da177e4SLinus Torvalds r->nrats, r->rats, &num, &den); 13481da177e4SLinus Torvalds if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { 13491da177e4SLinus Torvalds params->rate_num = num; 13501da177e4SLinus Torvalds params->rate_den = den; 13511da177e4SLinus Torvalds } 13521da177e4SLinus Torvalds return err; 13531da177e4SLinus Torvalds } 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds /** 13561c85cc64SRandy Dunlap * snd_pcm_hw_constraint_ratnums - apply ratnums constraint to a parameter 1357df8db936STakashi Iwai * @runtime: PCM runtime instance 1358df8db936STakashi Iwai * @cond: condition bits 1359df8db936STakashi Iwai * @var: hw_params variable to apply the ratnums constraint 1360877211f5STakashi Iwai * @r: struct snd_ratnums constriants 1361eb7c06e8SYacine Belkadi * 1362eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 13631da177e4SLinus Torvalds */ 1364877211f5STakashi Iwai int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime, 13651da177e4SLinus Torvalds unsigned int cond, 13661da177e4SLinus Torvalds snd_pcm_hw_param_t var, 1367e5e113cfSLars-Peter Clausen const struct snd_pcm_hw_constraint_ratnums *r) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 1370e5e113cfSLars-Peter Clausen snd_pcm_hw_rule_ratnums, (void *)r, 13711da177e4SLinus Torvalds var, -1); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds 1374e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums); 1375e88e8ae6STakashi Iwai 1376877211f5STakashi Iwai static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params, 1377877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 13781da177e4SLinus Torvalds { 1379e5e113cfSLars-Peter Clausen const struct snd_pcm_hw_constraint_ratdens *r = rule->private; 13801da177e4SLinus Torvalds unsigned int num = 0, den = 0; 13811da177e4SLinus Torvalds int err = snd_interval_ratden(hw_param_interval(params, rule->var), 13821da177e4SLinus Torvalds r->nrats, r->rats, &num, &den); 13831da177e4SLinus Torvalds if (err >= 0 && den && rule->var == SNDRV_PCM_HW_PARAM_RATE) { 13841da177e4SLinus Torvalds params->rate_num = num; 13851da177e4SLinus Torvalds params->rate_den = den; 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds return err; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds /** 13911c85cc64SRandy Dunlap * snd_pcm_hw_constraint_ratdens - apply ratdens constraint to a parameter 1392df8db936STakashi Iwai * @runtime: PCM runtime instance 1393df8db936STakashi Iwai * @cond: condition bits 1394df8db936STakashi Iwai * @var: hw_params variable to apply the ratdens constraint 1395877211f5STakashi Iwai * @r: struct snd_ratdens constriants 1396eb7c06e8SYacine Belkadi * 1397eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 13981da177e4SLinus Torvalds */ 1399877211f5STakashi Iwai int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime, 14001da177e4SLinus Torvalds unsigned int cond, 14011da177e4SLinus Torvalds snd_pcm_hw_param_t var, 1402e5e113cfSLars-Peter Clausen const struct snd_pcm_hw_constraint_ratdens *r) 14031da177e4SLinus Torvalds { 14041da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 1405e5e113cfSLars-Peter Clausen snd_pcm_hw_rule_ratdens, (void *)r, 14061da177e4SLinus Torvalds var, -1); 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds 1409e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens); 1410e88e8ae6STakashi Iwai 1411877211f5STakashi Iwai static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params, 1412877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 14131da177e4SLinus Torvalds { 14141da177e4SLinus Torvalds unsigned int l = (unsigned long) rule->private; 14151da177e4SLinus Torvalds int width = l & 0xffff; 14161da177e4SLinus Torvalds unsigned int msbits = l >> 16; 1417877211f5STakashi Iwai struct snd_interval *i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS); 14188ef9df55SLars-Peter Clausen 14198ef9df55SLars-Peter Clausen if (!snd_interval_single(i)) 14208ef9df55SLars-Peter Clausen return 0; 14218ef9df55SLars-Peter Clausen 14228ef9df55SLars-Peter Clausen if ((snd_interval_value(i) == width) || 14238ef9df55SLars-Peter Clausen (width == 0 && snd_interval_value(i) > msbits)) 142419f52faeSLars-Peter Clausen params->msbits = min_not_zero(params->msbits, msbits); 14258ef9df55SLars-Peter Clausen 14261da177e4SLinus Torvalds return 0; 14271da177e4SLinus Torvalds } 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds /** 14301c85cc64SRandy Dunlap * snd_pcm_hw_constraint_msbits - add a hw constraint msbits rule 1431df8db936STakashi Iwai * @runtime: PCM runtime instance 1432df8db936STakashi Iwai * @cond: condition bits 1433df8db936STakashi Iwai * @width: sample bits width 1434df8db936STakashi Iwai * @msbits: msbits width 1435eb7c06e8SYacine Belkadi * 14368ef9df55SLars-Peter Clausen * This constraint will set the number of most significant bits (msbits) if a 14378ef9df55SLars-Peter Clausen * sample format with the specified width has been select. If width is set to 0 14388ef9df55SLars-Peter Clausen * the msbits will be set for any sample format with a width larger than the 14398ef9df55SLars-Peter Clausen * specified msbits. 14408ef9df55SLars-Peter Clausen * 1441eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 14421da177e4SLinus Torvalds */ 1443877211f5STakashi Iwai int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime, 14441da177e4SLinus Torvalds unsigned int cond, 14451da177e4SLinus Torvalds unsigned int width, 14461da177e4SLinus Torvalds unsigned int msbits) 14471da177e4SLinus Torvalds { 14481da177e4SLinus Torvalds unsigned long l = (msbits << 16) | width; 14491da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, -1, 14501da177e4SLinus Torvalds snd_pcm_hw_rule_msbits, 14511da177e4SLinus Torvalds (void*) l, 14521da177e4SLinus Torvalds SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1); 14531da177e4SLinus Torvalds } 14541da177e4SLinus Torvalds 1455e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits); 1456e88e8ae6STakashi Iwai 1457877211f5STakashi Iwai static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, 1458877211f5STakashi Iwai struct snd_pcm_hw_rule *rule) 14591da177e4SLinus Torvalds { 14601da177e4SLinus Torvalds unsigned long step = (unsigned long) rule->private; 14610f519b62SClemens Ladisch return snd_interval_step(hw_param_interval(params, rule->var), step); 14621da177e4SLinus Torvalds } 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds /** 14651c85cc64SRandy Dunlap * snd_pcm_hw_constraint_step - add a hw constraint step rule 1466df8db936STakashi Iwai * @runtime: PCM runtime instance 1467df8db936STakashi Iwai * @cond: condition bits 1468df8db936STakashi Iwai * @var: hw_params variable to apply the step constraint 1469df8db936STakashi Iwai * @step: step size 1470eb7c06e8SYacine Belkadi * 1471eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 14721da177e4SLinus Torvalds */ 1473877211f5STakashi Iwai int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime, 14741da177e4SLinus Torvalds unsigned int cond, 14751da177e4SLinus Torvalds snd_pcm_hw_param_t var, 14761da177e4SLinus Torvalds unsigned long step) 14771da177e4SLinus Torvalds { 14781da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 14791da177e4SLinus Torvalds snd_pcm_hw_rule_step, (void *) step, 14801da177e4SLinus Torvalds var, -1); 14811da177e4SLinus Torvalds } 14821da177e4SLinus Torvalds 1483e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_step); 1484e88e8ae6STakashi Iwai 1485877211f5STakashi Iwai static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) 14861da177e4SLinus Torvalds { 148767c39317SMarcin Ślusarz static unsigned int pow2_sizes[] = { 14881da177e4SLinus Torvalds 1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7, 14891da177e4SLinus Torvalds 1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 14901da177e4SLinus Torvalds 1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23, 14911da177e4SLinus Torvalds 1<<24, 1<<25, 1<<26, 1<<27, 1<<28, 1<<29, 1<<30 14921da177e4SLinus Torvalds }; 14931da177e4SLinus Torvalds return snd_interval_list(hw_param_interval(params, rule->var), 14941da177e4SLinus Torvalds ARRAY_SIZE(pow2_sizes), pow2_sizes, 0); 14951da177e4SLinus Torvalds } 14961da177e4SLinus Torvalds 14971da177e4SLinus Torvalds /** 14981c85cc64SRandy Dunlap * snd_pcm_hw_constraint_pow2 - add a hw constraint power-of-2 rule 1499df8db936STakashi Iwai * @runtime: PCM runtime instance 1500df8db936STakashi Iwai * @cond: condition bits 1501df8db936STakashi Iwai * @var: hw_params variable to apply the power-of-2 constraint 1502eb7c06e8SYacine Belkadi * 1503eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 15041da177e4SLinus Torvalds */ 1505877211f5STakashi Iwai int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime, 15061da177e4SLinus Torvalds unsigned int cond, 15071da177e4SLinus Torvalds snd_pcm_hw_param_t var) 15081da177e4SLinus Torvalds { 15091da177e4SLinus Torvalds return snd_pcm_hw_rule_add(runtime, cond, var, 15101da177e4SLinus Torvalds snd_pcm_hw_rule_pow2, NULL, 15111da177e4SLinus Torvalds var, -1); 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds 1514e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2); 1515e88e8ae6STakashi Iwai 1516d5b702a6SClemens Ladisch static int snd_pcm_hw_rule_noresample_func(struct snd_pcm_hw_params *params, 1517d5b702a6SClemens Ladisch struct snd_pcm_hw_rule *rule) 1518d5b702a6SClemens Ladisch { 1519d5b702a6SClemens Ladisch unsigned int base_rate = (unsigned int)(uintptr_t)rule->private; 1520d5b702a6SClemens Ladisch struct snd_interval *rate; 1521d5b702a6SClemens Ladisch 1522d5b702a6SClemens Ladisch rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); 1523d5b702a6SClemens Ladisch return snd_interval_list(rate, 1, &base_rate, 0); 1524d5b702a6SClemens Ladisch } 1525d5b702a6SClemens Ladisch 1526d5b702a6SClemens Ladisch /** 1527d5b702a6SClemens Ladisch * snd_pcm_hw_rule_noresample - add a rule to allow disabling hw resampling 1528d5b702a6SClemens Ladisch * @runtime: PCM runtime instance 1529d5b702a6SClemens Ladisch * @base_rate: the rate at which the hardware does not resample 1530eb7c06e8SYacine Belkadi * 1531eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 1532d5b702a6SClemens Ladisch */ 1533d5b702a6SClemens Ladisch int snd_pcm_hw_rule_noresample(struct snd_pcm_runtime *runtime, 1534d5b702a6SClemens Ladisch unsigned int base_rate) 1535d5b702a6SClemens Ladisch { 1536d5b702a6SClemens Ladisch return snd_pcm_hw_rule_add(runtime, SNDRV_PCM_HW_PARAMS_NORESAMPLE, 1537d5b702a6SClemens Ladisch SNDRV_PCM_HW_PARAM_RATE, 1538d5b702a6SClemens Ladisch snd_pcm_hw_rule_noresample_func, 1539d5b702a6SClemens Ladisch (void *)(uintptr_t)base_rate, 1540d5b702a6SClemens Ladisch SNDRV_PCM_HW_PARAM_RATE, -1); 1541d5b702a6SClemens Ladisch } 1542d5b702a6SClemens Ladisch EXPORT_SYMBOL(snd_pcm_hw_rule_noresample); 1543d5b702a6SClemens Ladisch 1544877211f5STakashi Iwai static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params, 1545123992f7SAdrian Bunk snd_pcm_hw_param_t var) 15461da177e4SLinus Torvalds { 15471da177e4SLinus Torvalds if (hw_is_mask(var)) { 15481da177e4SLinus Torvalds snd_mask_any(hw_param_mask(params, var)); 15491da177e4SLinus Torvalds params->cmask |= 1 << var; 15501da177e4SLinus Torvalds params->rmask |= 1 << var; 15511da177e4SLinus Torvalds return; 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds if (hw_is_interval(var)) { 15541da177e4SLinus Torvalds snd_interval_any(hw_param_interval(params, var)); 15551da177e4SLinus Torvalds params->cmask |= 1 << var; 15561da177e4SLinus Torvalds params->rmask |= 1 << var; 15571da177e4SLinus Torvalds return; 15581da177e4SLinus Torvalds } 15591da177e4SLinus Torvalds snd_BUG(); 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds 1562877211f5STakashi Iwai void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params) 15631da177e4SLinus Torvalds { 15641da177e4SLinus Torvalds unsigned int k; 15651da177e4SLinus Torvalds memset(params, 0, sizeof(*params)); 15661da177e4SLinus Torvalds for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) 15671da177e4SLinus Torvalds _snd_pcm_hw_param_any(params, k); 15681da177e4SLinus Torvalds for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) 15691da177e4SLinus Torvalds _snd_pcm_hw_param_any(params, k); 15701da177e4SLinus Torvalds params->info = ~0U; 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds 1573e88e8ae6STakashi Iwai EXPORT_SYMBOL(_snd_pcm_hw_params_any); 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvalds /** 15761c85cc64SRandy Dunlap * snd_pcm_hw_param_value - return @params field @var value 1577df8db936STakashi Iwai * @params: the hw_params instance 1578df8db936STakashi Iwai * @var: parameter to retrieve 15791c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 15801da177e4SLinus Torvalds * 1581eb7c06e8SYacine Belkadi * Return: The value for field @var if it's fixed in configuration space 1582eb7c06e8SYacine Belkadi * defined by @params. -%EINVAL otherwise. 15831da177e4SLinus Torvalds */ 1584e88e8ae6STakashi Iwai int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params, 15851da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 15861da177e4SLinus Torvalds { 15871da177e4SLinus Torvalds if (hw_is_mask(var)) { 1588877211f5STakashi Iwai const struct snd_mask *mask = hw_param_mask_c(params, var); 15891da177e4SLinus Torvalds if (!snd_mask_single(mask)) 15901da177e4SLinus Torvalds return -EINVAL; 15911da177e4SLinus Torvalds if (dir) 15921da177e4SLinus Torvalds *dir = 0; 15931da177e4SLinus Torvalds return snd_mask_value(mask); 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds if (hw_is_interval(var)) { 1596877211f5STakashi Iwai const struct snd_interval *i = hw_param_interval_c(params, var); 15971da177e4SLinus Torvalds if (!snd_interval_single(i)) 15981da177e4SLinus Torvalds return -EINVAL; 15991da177e4SLinus Torvalds if (dir) 16001da177e4SLinus Torvalds *dir = i->openmin; 16011da177e4SLinus Torvalds return snd_interval_value(i); 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds return -EINVAL; 16041da177e4SLinus Torvalds } 16051da177e4SLinus Torvalds 1606e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_value); 16071da177e4SLinus Torvalds 1608877211f5STakashi Iwai void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params, 16091da177e4SLinus Torvalds snd_pcm_hw_param_t var) 16101da177e4SLinus Torvalds { 16111da177e4SLinus Torvalds if (hw_is_mask(var)) { 16121da177e4SLinus Torvalds snd_mask_none(hw_param_mask(params, var)); 16131da177e4SLinus Torvalds params->cmask |= 1 << var; 16141da177e4SLinus Torvalds params->rmask |= 1 << var; 16151da177e4SLinus Torvalds } else if (hw_is_interval(var)) { 16161da177e4SLinus Torvalds snd_interval_none(hw_param_interval(params, var)); 16171da177e4SLinus Torvalds params->cmask |= 1 << var; 16181da177e4SLinus Torvalds params->rmask |= 1 << var; 16191da177e4SLinus Torvalds } else { 16201da177e4SLinus Torvalds snd_BUG(); 16211da177e4SLinus Torvalds } 16221da177e4SLinus Torvalds } 16231da177e4SLinus Torvalds 1624e88e8ae6STakashi Iwai EXPORT_SYMBOL(_snd_pcm_hw_param_setempty); 16251da177e4SLinus Torvalds 1626877211f5STakashi Iwai static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params, 16271da177e4SLinus Torvalds snd_pcm_hw_param_t var) 16281da177e4SLinus Torvalds { 16291da177e4SLinus Torvalds int changed; 16301da177e4SLinus Torvalds if (hw_is_mask(var)) 16311da177e4SLinus Torvalds changed = snd_mask_refine_first(hw_param_mask(params, var)); 16321da177e4SLinus Torvalds else if (hw_is_interval(var)) 16331da177e4SLinus Torvalds changed = snd_interval_refine_first(hw_param_interval(params, var)); 16342f4ca8e5STakashi Iwai else 16351da177e4SLinus Torvalds return -EINVAL; 16361da177e4SLinus Torvalds if (changed) { 16371da177e4SLinus Torvalds params->cmask |= 1 << var; 16381da177e4SLinus Torvalds params->rmask |= 1 << var; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds return changed; 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds 16431da177e4SLinus Torvalds 16441da177e4SLinus Torvalds /** 16451c85cc64SRandy Dunlap * snd_pcm_hw_param_first - refine config space and return minimum value 1646df8db936STakashi Iwai * @pcm: PCM instance 1647df8db936STakashi Iwai * @params: the hw_params instance 1648df8db936STakashi Iwai * @var: parameter to retrieve 16491c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 16501da177e4SLinus Torvalds * 16511c85cc64SRandy Dunlap * Inside configuration space defined by @params remove from @var all 16521da177e4SLinus Torvalds * values > minimum. Reduce configuration space accordingly. 1653eb7c06e8SYacine Belkadi * 1654eb7c06e8SYacine Belkadi * Return: The minimum, or a negative error code on failure. 16551da177e4SLinus Torvalds */ 1656e88e8ae6STakashi Iwai int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, 1657877211f5STakashi Iwai struct snd_pcm_hw_params *params, 16581da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 16591da177e4SLinus Torvalds { 16601da177e4SLinus Torvalds int changed = _snd_pcm_hw_param_first(params, var); 16611da177e4SLinus Torvalds if (changed < 0) 16621da177e4SLinus Torvalds return changed; 16631da177e4SLinus Torvalds if (params->rmask) { 16641da177e4SLinus Torvalds int err = snd_pcm_hw_refine(pcm, params); 16657eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 16667eaa943cSTakashi Iwai return err; 16671da177e4SLinus Torvalds } 16681da177e4SLinus Torvalds return snd_pcm_hw_param_value(params, var, dir); 16691da177e4SLinus Torvalds } 16701da177e4SLinus Torvalds 1671e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_first); 1672e88e8ae6STakashi Iwai 1673877211f5STakashi Iwai static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params, 16741da177e4SLinus Torvalds snd_pcm_hw_param_t var) 16751da177e4SLinus Torvalds { 16761da177e4SLinus Torvalds int changed; 16771da177e4SLinus Torvalds if (hw_is_mask(var)) 16781da177e4SLinus Torvalds changed = snd_mask_refine_last(hw_param_mask(params, var)); 16791da177e4SLinus Torvalds else if (hw_is_interval(var)) 16801da177e4SLinus Torvalds changed = snd_interval_refine_last(hw_param_interval(params, var)); 16812f4ca8e5STakashi Iwai else 16821da177e4SLinus Torvalds return -EINVAL; 16831da177e4SLinus Torvalds if (changed) { 16841da177e4SLinus Torvalds params->cmask |= 1 << var; 16851da177e4SLinus Torvalds params->rmask |= 1 << var; 16861da177e4SLinus Torvalds } 16871da177e4SLinus Torvalds return changed; 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds 16901da177e4SLinus Torvalds 16911da177e4SLinus Torvalds /** 16921c85cc64SRandy Dunlap * snd_pcm_hw_param_last - refine config space and return maximum value 1693df8db936STakashi Iwai * @pcm: PCM instance 1694df8db936STakashi Iwai * @params: the hw_params instance 1695df8db936STakashi Iwai * @var: parameter to retrieve 16961c85cc64SRandy Dunlap * @dir: pointer to the direction (-1,0,1) or %NULL 16971da177e4SLinus Torvalds * 16981c85cc64SRandy Dunlap * Inside configuration space defined by @params remove from @var all 16991da177e4SLinus Torvalds * values < maximum. Reduce configuration space accordingly. 1700eb7c06e8SYacine Belkadi * 1701eb7c06e8SYacine Belkadi * Return: The maximum, or a negative error code on failure. 17021da177e4SLinus Torvalds */ 1703e88e8ae6STakashi Iwai int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, 1704877211f5STakashi Iwai struct snd_pcm_hw_params *params, 17051da177e4SLinus Torvalds snd_pcm_hw_param_t var, int *dir) 17061da177e4SLinus Torvalds { 17071da177e4SLinus Torvalds int changed = _snd_pcm_hw_param_last(params, var); 17081da177e4SLinus Torvalds if (changed < 0) 17091da177e4SLinus Torvalds return changed; 17101da177e4SLinus Torvalds if (params->rmask) { 17111da177e4SLinus Torvalds int err = snd_pcm_hw_refine(pcm, params); 17127eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 17137eaa943cSTakashi Iwai return err; 17141da177e4SLinus Torvalds } 17151da177e4SLinus Torvalds return snd_pcm_hw_param_value(params, var, dir); 17161da177e4SLinus Torvalds } 17171da177e4SLinus Torvalds 1718e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_hw_param_last); 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds /** 17211c85cc64SRandy Dunlap * snd_pcm_hw_param_choose - choose a configuration defined by @params 1722df8db936STakashi Iwai * @pcm: PCM instance 1723df8db936STakashi Iwai * @params: the hw_params instance 17241da177e4SLinus Torvalds * 17251c85cc64SRandy Dunlap * Choose one configuration from configuration space defined by @params. 17261da177e4SLinus Torvalds * The configuration chosen is that obtained fixing in this order: 17271da177e4SLinus Torvalds * first access, first format, first subformat, min channels, 17281da177e4SLinus Torvalds * min rate, min period time, max buffer size, min tick time 1729eb7c06e8SYacine Belkadi * 1730eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 17311da177e4SLinus Torvalds */ 17322f4ca8e5STakashi Iwai int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, 17332f4ca8e5STakashi Iwai struct snd_pcm_hw_params *params) 17341da177e4SLinus Torvalds { 17352f4ca8e5STakashi Iwai static int vars[] = { 17362f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_ACCESS, 17372f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_FORMAT, 17382f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_SUBFORMAT, 17392f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_CHANNELS, 17402f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_RATE, 17412f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_PERIOD_TIME, 17422f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 17432f4ca8e5STakashi Iwai SNDRV_PCM_HW_PARAM_TICK_TIME, 17442f4ca8e5STakashi Iwai -1 17452f4ca8e5STakashi Iwai }; 17462f4ca8e5STakashi Iwai int err, *v; 17471da177e4SLinus Torvalds 17482f4ca8e5STakashi Iwai for (v = vars; *v != -1; v++) { 17492f4ca8e5STakashi Iwai if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE) 17502f4ca8e5STakashi Iwai err = snd_pcm_hw_param_first(pcm, params, *v, NULL); 17512f4ca8e5STakashi Iwai else 17522f4ca8e5STakashi Iwai err = snd_pcm_hw_param_last(pcm, params, *v, NULL); 17537eaa943cSTakashi Iwai if (snd_BUG_ON(err < 0)) 17547eaa943cSTakashi Iwai return err; 17552f4ca8e5STakashi Iwai } 17561da177e4SLinus Torvalds return 0; 17571da177e4SLinus Torvalds } 17581da177e4SLinus Torvalds 1759877211f5STakashi Iwai static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream, 17601da177e4SLinus Torvalds void *arg) 17611da177e4SLinus Torvalds { 1762877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 17631da177e4SLinus Torvalds unsigned long flags; 17641da177e4SLinus Torvalds snd_pcm_stream_lock_irqsave(substream, flags); 17651da177e4SLinus Torvalds if (snd_pcm_running(substream) && 17661da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream) >= 0) 17671da177e4SLinus Torvalds runtime->status->hw_ptr %= runtime->buffer_size; 17680e8014d7SPierre-Louis Bossart else { 17691da177e4SLinus Torvalds runtime->status->hw_ptr = 0; 17700e8014d7SPierre-Louis Bossart runtime->hw_ptr_wrap = 0; 17710e8014d7SPierre-Louis Bossart } 17721da177e4SLinus Torvalds snd_pcm_stream_unlock_irqrestore(substream, flags); 17731da177e4SLinus Torvalds return 0; 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds 1776877211f5STakashi Iwai static int snd_pcm_lib_ioctl_channel_info(struct snd_pcm_substream *substream, 17771da177e4SLinus Torvalds void *arg) 17781da177e4SLinus Torvalds { 1779877211f5STakashi Iwai struct snd_pcm_channel_info *info = arg; 1780877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 17811da177e4SLinus Torvalds int width; 17821da177e4SLinus Torvalds if (!(runtime->info & SNDRV_PCM_INFO_MMAP)) { 17831da177e4SLinus Torvalds info->offset = -1; 17841da177e4SLinus Torvalds return 0; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds width = snd_pcm_format_physical_width(runtime->format); 17871da177e4SLinus Torvalds if (width < 0) 17881da177e4SLinus Torvalds return width; 17891da177e4SLinus Torvalds info->offset = 0; 17901da177e4SLinus Torvalds switch (runtime->access) { 17911da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_MMAP_INTERLEAVED: 17921da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_RW_INTERLEAVED: 17931da177e4SLinus Torvalds info->first = info->channel * width; 17941da177e4SLinus Torvalds info->step = runtime->channels * width; 17951da177e4SLinus Torvalds break; 17961da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED: 17971da177e4SLinus Torvalds case SNDRV_PCM_ACCESS_RW_NONINTERLEAVED: 17981da177e4SLinus Torvalds { 17991da177e4SLinus Torvalds size_t size = runtime->dma_bytes / runtime->channels; 18001da177e4SLinus Torvalds info->first = info->channel * size * 8; 18011da177e4SLinus Torvalds info->step = width; 18021da177e4SLinus Torvalds break; 18031da177e4SLinus Torvalds } 18041da177e4SLinus Torvalds default: 18051da177e4SLinus Torvalds snd_BUG(); 18061da177e4SLinus Torvalds break; 18071da177e4SLinus Torvalds } 18081da177e4SLinus Torvalds return 0; 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds 18118bea869cSJaroslav Kysela static int snd_pcm_lib_ioctl_fifo_size(struct snd_pcm_substream *substream, 18128bea869cSJaroslav Kysela void *arg) 18138bea869cSJaroslav Kysela { 18148bea869cSJaroslav Kysela struct snd_pcm_hw_params *params = arg; 18158bea869cSJaroslav Kysela snd_pcm_format_t format; 1816a9960e6aSClemens Ladisch int channels; 1817a9960e6aSClemens Ladisch ssize_t frame_size; 18188bea869cSJaroslav Kysela 18198bea869cSJaroslav Kysela params->fifo_size = substream->runtime->hw.fifo_size; 18208bea869cSJaroslav Kysela if (!(substream->runtime->hw.info & SNDRV_PCM_INFO_FIFO_IN_FRAMES)) { 18218bea869cSJaroslav Kysela format = params_format(params); 18228bea869cSJaroslav Kysela channels = params_channels(params); 1823a9960e6aSClemens Ladisch frame_size = snd_pcm_format_size(format, channels); 1824a9960e6aSClemens Ladisch if (frame_size > 0) 1825a9960e6aSClemens Ladisch params->fifo_size /= (unsigned)frame_size; 18268bea869cSJaroslav Kysela } 18278bea869cSJaroslav Kysela return 0; 18288bea869cSJaroslav Kysela } 18298bea869cSJaroslav Kysela 18301da177e4SLinus Torvalds /** 18311da177e4SLinus Torvalds * snd_pcm_lib_ioctl - a generic PCM ioctl callback 18321da177e4SLinus Torvalds * @substream: the pcm substream instance 18331da177e4SLinus Torvalds * @cmd: ioctl command 18341da177e4SLinus Torvalds * @arg: ioctl argument 18351da177e4SLinus Torvalds * 18361da177e4SLinus Torvalds * Processes the generic ioctl commands for PCM. 18371da177e4SLinus Torvalds * Can be passed as the ioctl callback for PCM ops. 18381da177e4SLinus Torvalds * 1839eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error code on failure. 18401da177e4SLinus Torvalds */ 1841877211f5STakashi Iwai int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream, 18421da177e4SLinus Torvalds unsigned int cmd, void *arg) 18431da177e4SLinus Torvalds { 18441da177e4SLinus Torvalds switch (cmd) { 18451da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_INFO: 18461da177e4SLinus Torvalds return 0; 18471da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_RESET: 18481da177e4SLinus Torvalds return snd_pcm_lib_ioctl_reset(substream, arg); 18491da177e4SLinus Torvalds case SNDRV_PCM_IOCTL1_CHANNEL_INFO: 18501da177e4SLinus Torvalds return snd_pcm_lib_ioctl_channel_info(substream, arg); 18518bea869cSJaroslav Kysela case SNDRV_PCM_IOCTL1_FIFO_SIZE: 18528bea869cSJaroslav Kysela return snd_pcm_lib_ioctl_fifo_size(substream, arg); 18531da177e4SLinus Torvalds } 18541da177e4SLinus Torvalds return -ENXIO; 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds 1857e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_ioctl); 1858e88e8ae6STakashi Iwai 18591da177e4SLinus Torvalds /** 18601da177e4SLinus Torvalds * snd_pcm_period_elapsed - update the pcm status for the next period 18611da177e4SLinus Torvalds * @substream: the pcm substream instance 18621da177e4SLinus Torvalds * 18631da177e4SLinus Torvalds * This function is called from the interrupt handler when the 18641da177e4SLinus Torvalds * PCM has processed the period size. It will update the current 186531e8960bSTakashi Iwai * pointer, wake up sleepers, etc. 18661da177e4SLinus Torvalds * 18671da177e4SLinus Torvalds * Even if more than one periods have elapsed since the last call, you 18681da177e4SLinus Torvalds * have to call this only once. 18691da177e4SLinus Torvalds */ 1870877211f5STakashi Iwai void snd_pcm_period_elapsed(struct snd_pcm_substream *substream) 18711da177e4SLinus Torvalds { 1872877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 18731da177e4SLinus Torvalds unsigned long flags; 18741da177e4SLinus Torvalds 18757eaa943cSTakashi Iwai if (PCM_RUNTIME_CHECK(substream)) 18767eaa943cSTakashi Iwai return; 18771da177e4SLinus Torvalds runtime = substream->runtime; 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds snd_pcm_stream_lock_irqsave(substream, flags); 18801da177e4SLinus Torvalds if (!snd_pcm_running(substream) || 1881f240406bSJaroslav Kysela snd_pcm_update_hw_ptr0(substream, 1) < 0) 18821da177e4SLinus Torvalds goto _end; 18831da177e4SLinus Torvalds 188490bbaf66SJie Yang #ifdef CONFIG_SND_PCM_TIMER 18851da177e4SLinus Torvalds if (substream->timer_running) 18861da177e4SLinus Torvalds snd_timer_interrupt(substream->timer, 1); 188790bbaf66SJie Yang #endif 18881da177e4SLinus Torvalds _end: 18891da177e4SLinus Torvalds kill_fasync(&runtime->fasync, SIGIO, POLL_IN); 18903aa02cb6STakashi Iwai snd_pcm_stream_unlock_irqrestore(substream, flags); 18911da177e4SLinus Torvalds } 18921da177e4SLinus Torvalds 1893e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_period_elapsed); 1894e88e8ae6STakashi Iwai 189513075510STakashi Iwai /* 189613075510STakashi Iwai * Wait until avail_min data becomes available 189713075510STakashi Iwai * Returns a negative error code if any error occurs during operation. 189813075510STakashi Iwai * The available space is stored on availp. When err = 0 and avail = 0 189913075510STakashi Iwai * on the capture stream, it indicates the stream is in DRAINING state. 190013075510STakashi Iwai */ 19015daeba34SDavid Dillow static int wait_for_avail(struct snd_pcm_substream *substream, 190213075510STakashi Iwai snd_pcm_uframes_t *availp) 190313075510STakashi Iwai { 190413075510STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 190513075510STakashi Iwai int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; 190613075510STakashi Iwai wait_queue_t wait; 190713075510STakashi Iwai int err = 0; 190813075510STakashi Iwai snd_pcm_uframes_t avail = 0; 1909f2b3614cSTakashi Iwai long wait_time, tout; 191013075510STakashi Iwai 1911763437a9SArjan van de Ven init_waitqueue_entry(&wait, current); 1912763437a9SArjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 1913763437a9SArjan van de Ven add_wait_queue(&runtime->tsleep, &wait); 1914763437a9SArjan van de Ven 1915f2b3614cSTakashi Iwai if (runtime->no_period_wakeup) 1916f2b3614cSTakashi Iwai wait_time = MAX_SCHEDULE_TIMEOUT; 1917f2b3614cSTakashi Iwai else { 1918f2b3614cSTakashi Iwai wait_time = 10; 1919f2b3614cSTakashi Iwai if (runtime->rate) { 1920f2b3614cSTakashi Iwai long t = runtime->period_size * 2 / runtime->rate; 1921f2b3614cSTakashi Iwai wait_time = max(t, wait_time); 1922f2b3614cSTakashi Iwai } 1923f2b3614cSTakashi Iwai wait_time = msecs_to_jiffies(wait_time * 1000); 1924f2b3614cSTakashi Iwai } 1925763437a9SArjan van de Ven 192613075510STakashi Iwai for (;;) { 192713075510STakashi Iwai if (signal_pending(current)) { 192813075510STakashi Iwai err = -ERESTARTSYS; 192913075510STakashi Iwai break; 193013075510STakashi Iwai } 1931763437a9SArjan van de Ven 1932763437a9SArjan van de Ven /* 1933763437a9SArjan van de Ven * We need to check if space became available already 1934763437a9SArjan van de Ven * (and thus the wakeup happened already) first to close 1935763437a9SArjan van de Ven * the race of space already having become available. 1936763437a9SArjan van de Ven * This check must happen after been added to the waitqueue 1937763437a9SArjan van de Ven * and having current state be INTERRUPTIBLE. 1938763437a9SArjan van de Ven */ 1939763437a9SArjan van de Ven if (is_playback) 1940763437a9SArjan van de Ven avail = snd_pcm_playback_avail(runtime); 1941763437a9SArjan van de Ven else 1942763437a9SArjan van de Ven avail = snd_pcm_capture_avail(runtime); 1943763437a9SArjan van de Ven if (avail >= runtime->twake) 1944763437a9SArjan van de Ven break; 194513075510STakashi Iwai snd_pcm_stream_unlock_irq(substream); 1946763437a9SArjan van de Ven 1947763437a9SArjan van de Ven tout = schedule_timeout(wait_time); 1948763437a9SArjan van de Ven 194913075510STakashi Iwai snd_pcm_stream_lock_irq(substream); 1950763437a9SArjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 195113075510STakashi Iwai switch (runtime->status->state) { 195213075510STakashi Iwai case SNDRV_PCM_STATE_SUSPENDED: 195313075510STakashi Iwai err = -ESTRPIPE; 195413075510STakashi Iwai goto _endloop; 195513075510STakashi Iwai case SNDRV_PCM_STATE_XRUN: 195613075510STakashi Iwai err = -EPIPE; 195713075510STakashi Iwai goto _endloop; 195813075510STakashi Iwai case SNDRV_PCM_STATE_DRAINING: 195913075510STakashi Iwai if (is_playback) 196013075510STakashi Iwai err = -EPIPE; 196113075510STakashi Iwai else 196213075510STakashi Iwai avail = 0; /* indicate draining */ 196313075510STakashi Iwai goto _endloop; 196413075510STakashi Iwai case SNDRV_PCM_STATE_OPEN: 196513075510STakashi Iwai case SNDRV_PCM_STATE_SETUP: 196613075510STakashi Iwai case SNDRV_PCM_STATE_DISCONNECTED: 196713075510STakashi Iwai err = -EBADFD; 196813075510STakashi Iwai goto _endloop; 1969ed697e1aSJongHo Kim case SNDRV_PCM_STATE_PAUSED: 1970ed697e1aSJongHo Kim continue; 197113075510STakashi Iwai } 197213075510STakashi Iwai if (!tout) { 197309e56df8STakashi Iwai pcm_dbg(substream->pcm, 197409e56df8STakashi Iwai "%s write error (DMA or IRQ trouble?)\n", 197513075510STakashi Iwai is_playback ? "playback" : "capture"); 197613075510STakashi Iwai err = -EIO; 197713075510STakashi Iwai break; 197813075510STakashi Iwai } 197913075510STakashi Iwai } 198013075510STakashi Iwai _endloop: 1981763437a9SArjan van de Ven set_current_state(TASK_RUNNING); 1982c91a988dSJaroslav Kysela remove_wait_queue(&runtime->tsleep, &wait); 198313075510STakashi Iwai *availp = avail; 198413075510STakashi Iwai return err; 198513075510STakashi Iwai } 198613075510STakashi Iwai 1987877211f5STakashi Iwai static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream, 19881da177e4SLinus Torvalds unsigned int hwoff, 19891da177e4SLinus Torvalds unsigned long data, unsigned int off, 19901da177e4SLinus Torvalds snd_pcm_uframes_t frames) 19911da177e4SLinus Torvalds { 1992877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 19931da177e4SLinus Torvalds int err; 19941da177e4SLinus Torvalds char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); 19951da177e4SLinus Torvalds if (substream->ops->copy) { 19961da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) 19971da177e4SLinus Torvalds return err; 19981da177e4SLinus Torvalds } else { 19991da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); 20001da177e4SLinus Torvalds if (copy_from_user(hwbuf, buf, frames_to_bytes(runtime, frames))) 20011da177e4SLinus Torvalds return -EFAULT; 20021da177e4SLinus Torvalds } 20031da177e4SLinus Torvalds return 0; 20041da177e4SLinus Torvalds } 20051da177e4SLinus Torvalds 2006877211f5STakashi Iwai typedef int (*transfer_f)(struct snd_pcm_substream *substream, unsigned int hwoff, 20071da177e4SLinus Torvalds unsigned long data, unsigned int off, 20081da177e4SLinus Torvalds snd_pcm_uframes_t size); 20091da177e4SLinus Torvalds 2010877211f5STakashi Iwai static snd_pcm_sframes_t snd_pcm_lib_write1(struct snd_pcm_substream *substream, 20111da177e4SLinus Torvalds unsigned long data, 20121da177e4SLinus Torvalds snd_pcm_uframes_t size, 20131da177e4SLinus Torvalds int nonblock, 20141da177e4SLinus Torvalds transfer_f transfer) 20151da177e4SLinus Torvalds { 2016877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 20171da177e4SLinus Torvalds snd_pcm_uframes_t xfer = 0; 20181da177e4SLinus Torvalds snd_pcm_uframes_t offset = 0; 20190910c216STakashi Iwai snd_pcm_uframes_t avail; 20201da177e4SLinus Torvalds int err = 0; 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds if (size == 0) 20231da177e4SLinus Torvalds return 0; 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 20261da177e4SLinus Torvalds switch (runtime->status->state) { 20271da177e4SLinus Torvalds case SNDRV_PCM_STATE_PREPARED: 20281da177e4SLinus Torvalds case SNDRV_PCM_STATE_RUNNING: 20291da177e4SLinus Torvalds case SNDRV_PCM_STATE_PAUSED: 20301da177e4SLinus Torvalds break; 20311da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 20321da177e4SLinus Torvalds err = -EPIPE; 20331da177e4SLinus Torvalds goto _end_unlock; 20341da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 20351da177e4SLinus Torvalds err = -ESTRPIPE; 20361da177e4SLinus Torvalds goto _end_unlock; 20371da177e4SLinus Torvalds default: 20381da177e4SLinus Torvalds err = -EBADFD; 20391da177e4SLinus Torvalds goto _end_unlock; 20401da177e4SLinus Torvalds } 20411da177e4SLinus Torvalds 20425daeba34SDavid Dillow runtime->twake = runtime->control->avail_min ? : 1; 204331e8960bSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 20441da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream); 20451da177e4SLinus Torvalds avail = snd_pcm_playback_avail(runtime); 20460910c216STakashi Iwai while (size > 0) { 20470910c216STakashi Iwai snd_pcm_uframes_t frames, appl_ptr, appl_ofs; 20480910c216STakashi Iwai snd_pcm_uframes_t cont; 204913075510STakashi Iwai if (!avail) { 20501da177e4SLinus Torvalds if (nonblock) { 20511da177e4SLinus Torvalds err = -EAGAIN; 20521da177e4SLinus Torvalds goto _end_unlock; 20531da177e4SLinus Torvalds } 20545daeba34SDavid Dillow runtime->twake = min_t(snd_pcm_uframes_t, size, 20555daeba34SDavid Dillow runtime->control->avail_min ? : 1); 20565daeba34SDavid Dillow err = wait_for_avail(substream, &avail); 205713075510STakashi Iwai if (err < 0) 20581da177e4SLinus Torvalds goto _end_unlock; 20591da177e4SLinus Torvalds } 20601da177e4SLinus Torvalds frames = size > avail ? avail : size; 20611da177e4SLinus Torvalds cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; 20621da177e4SLinus Torvalds if (frames > cont) 20631da177e4SLinus Torvalds frames = cont; 20647eaa943cSTakashi Iwai if (snd_BUG_ON(!frames)) { 2065c91a988dSJaroslav Kysela runtime->twake = 0; 20667eaa943cSTakashi Iwai snd_pcm_stream_unlock_irq(substream); 20677eaa943cSTakashi Iwai return -EINVAL; 20687eaa943cSTakashi Iwai } 20691da177e4SLinus Torvalds appl_ptr = runtime->control->appl_ptr; 20701da177e4SLinus Torvalds appl_ofs = appl_ptr % runtime->buffer_size; 20711da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 20721250932eSJaroslav Kysela err = transfer(substream, appl_ofs, data, offset, frames); 20731da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 20741250932eSJaroslav Kysela if (err < 0) 20751250932eSJaroslav Kysela goto _end_unlock; 20761da177e4SLinus Torvalds switch (runtime->status->state) { 20771da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 20781da177e4SLinus Torvalds err = -EPIPE; 20791da177e4SLinus Torvalds goto _end_unlock; 20801da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 20811da177e4SLinus Torvalds err = -ESTRPIPE; 20821da177e4SLinus Torvalds goto _end_unlock; 20831da177e4SLinus Torvalds default: 20841da177e4SLinus Torvalds break; 20851da177e4SLinus Torvalds } 20861da177e4SLinus Torvalds appl_ptr += frames; 20871da177e4SLinus Torvalds if (appl_ptr >= runtime->boundary) 20881da177e4SLinus Torvalds appl_ptr -= runtime->boundary; 20891da177e4SLinus Torvalds runtime->control->appl_ptr = appl_ptr; 20901da177e4SLinus Torvalds if (substream->ops->ack) 20911da177e4SLinus Torvalds substream->ops->ack(substream); 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds offset += frames; 20941da177e4SLinus Torvalds size -= frames; 20951da177e4SLinus Torvalds xfer += frames; 20960910c216STakashi Iwai avail -= frames; 20971da177e4SLinus Torvalds if (runtime->status->state == SNDRV_PCM_STATE_PREPARED && 20981da177e4SLinus Torvalds snd_pcm_playback_hw_avail(runtime) >= (snd_pcm_sframes_t)runtime->start_threshold) { 20991da177e4SLinus Torvalds err = snd_pcm_start(substream); 21001da177e4SLinus Torvalds if (err < 0) 21011da177e4SLinus Torvalds goto _end_unlock; 21021da177e4SLinus Torvalds } 21031da177e4SLinus Torvalds } 21041da177e4SLinus Torvalds _end_unlock: 2105c91a988dSJaroslav Kysela runtime->twake = 0; 21061250932eSJaroslav Kysela if (xfer > 0 && err >= 0) 21071250932eSJaroslav Kysela snd_pcm_update_state(substream, runtime); 21081da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 21091da177e4SLinus Torvalds return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; 21101da177e4SLinus Torvalds } 21111da177e4SLinus Torvalds 21127eaa943cSTakashi Iwai /* sanity-check for read/write methods */ 21137eaa943cSTakashi Iwai static int pcm_sanity_check(struct snd_pcm_substream *substream) 21147eaa943cSTakashi Iwai { 21157eaa943cSTakashi Iwai struct snd_pcm_runtime *runtime; 21167eaa943cSTakashi Iwai if (PCM_RUNTIME_CHECK(substream)) 21177eaa943cSTakashi Iwai return -ENXIO; 21187eaa943cSTakashi Iwai runtime = substream->runtime; 21197eaa943cSTakashi Iwai if (snd_BUG_ON(!substream->ops->copy && !runtime->dma_area)) 21207eaa943cSTakashi Iwai return -EINVAL; 21217eaa943cSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 21227eaa943cSTakashi Iwai return -EBADFD; 21237eaa943cSTakashi Iwai return 0; 21247eaa943cSTakashi Iwai } 21257eaa943cSTakashi Iwai 2126877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const void __user *buf, snd_pcm_uframes_t size) 21271da177e4SLinus Torvalds { 2128877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 21291da177e4SLinus Torvalds int nonblock; 21307eaa943cSTakashi Iwai int err; 21311da177e4SLinus Torvalds 21327eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 21337eaa943cSTakashi Iwai if (err < 0) 21347eaa943cSTakashi Iwai return err; 21351da177e4SLinus Torvalds runtime = substream->runtime; 21360df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 21371da177e4SLinus Torvalds 21381da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED && 21391da177e4SLinus Torvalds runtime->channels > 1) 21401da177e4SLinus Torvalds return -EINVAL; 21411da177e4SLinus Torvalds return snd_pcm_lib_write1(substream, (unsigned long)buf, size, nonblock, 21421da177e4SLinus Torvalds snd_pcm_lib_write_transfer); 21431da177e4SLinus Torvalds } 21441da177e4SLinus Torvalds 2145e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_write); 2146e88e8ae6STakashi Iwai 2147877211f5STakashi Iwai static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream, 21481da177e4SLinus Torvalds unsigned int hwoff, 21491da177e4SLinus Torvalds unsigned long data, unsigned int off, 21501da177e4SLinus Torvalds snd_pcm_uframes_t frames) 21511da177e4SLinus Torvalds { 2152877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 21531da177e4SLinus Torvalds int err; 21541da177e4SLinus Torvalds void __user **bufs = (void __user **)data; 21551da177e4SLinus Torvalds int channels = runtime->channels; 21561da177e4SLinus Torvalds int c; 21571da177e4SLinus Torvalds if (substream->ops->copy) { 21587eaa943cSTakashi Iwai if (snd_BUG_ON(!substream->ops->silence)) 21597eaa943cSTakashi Iwai return -EINVAL; 21601da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 21611da177e4SLinus Torvalds if (*bufs == NULL) { 21621da177e4SLinus Torvalds if ((err = substream->ops->silence(substream, c, hwoff, frames)) < 0) 21631da177e4SLinus Torvalds return err; 21641da177e4SLinus Torvalds } else { 21651da177e4SLinus Torvalds char __user *buf = *bufs + samples_to_bytes(runtime, off); 21661da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) 21671da177e4SLinus Torvalds return err; 21681da177e4SLinus Torvalds } 21691da177e4SLinus Torvalds } 21701da177e4SLinus Torvalds } else { 21711da177e4SLinus Torvalds /* default transfer behaviour */ 21721da177e4SLinus Torvalds size_t dma_csize = runtime->dma_bytes / channels; 21731da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 21741da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); 21751da177e4SLinus Torvalds if (*bufs == NULL) { 21761da177e4SLinus Torvalds snd_pcm_format_set_silence(runtime->format, hwbuf, frames); 21771da177e4SLinus Torvalds } else { 21781da177e4SLinus Torvalds char __user *buf = *bufs + samples_to_bytes(runtime, off); 21791da177e4SLinus Torvalds if (copy_from_user(hwbuf, buf, samples_to_bytes(runtime, frames))) 21801da177e4SLinus Torvalds return -EFAULT; 21811da177e4SLinus Torvalds } 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds } 21841da177e4SLinus Torvalds return 0; 21851da177e4SLinus Torvalds } 21861da177e4SLinus Torvalds 2187877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream, 21881da177e4SLinus Torvalds void __user **bufs, 21891da177e4SLinus Torvalds snd_pcm_uframes_t frames) 21901da177e4SLinus Torvalds { 2191877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 21921da177e4SLinus Torvalds int nonblock; 21937eaa943cSTakashi Iwai int err; 21941da177e4SLinus Torvalds 21957eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 21967eaa943cSTakashi Iwai if (err < 0) 21977eaa943cSTakashi Iwai return err; 21981da177e4SLinus Torvalds runtime = substream->runtime; 21990df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 22001da177e4SLinus Torvalds 22011da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 22021da177e4SLinus Torvalds return -EINVAL; 22031da177e4SLinus Torvalds return snd_pcm_lib_write1(substream, (unsigned long)bufs, frames, 22041da177e4SLinus Torvalds nonblock, snd_pcm_lib_writev_transfer); 22051da177e4SLinus Torvalds } 22061da177e4SLinus Torvalds 2207e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_writev); 2208e88e8ae6STakashi Iwai 2209877211f5STakashi Iwai static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, 22101da177e4SLinus Torvalds unsigned int hwoff, 22111da177e4SLinus Torvalds unsigned long data, unsigned int off, 22121da177e4SLinus Torvalds snd_pcm_uframes_t frames) 22131da177e4SLinus Torvalds { 2214877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 22151da177e4SLinus Torvalds int err; 22161da177e4SLinus Torvalds char __user *buf = (char __user *) data + frames_to_bytes(runtime, off); 22171da177e4SLinus Torvalds if (substream->ops->copy) { 22181da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, -1, hwoff, buf, frames)) < 0) 22191da177e4SLinus Torvalds return err; 22201da177e4SLinus Torvalds } else { 22211da177e4SLinus Torvalds char *hwbuf = runtime->dma_area + frames_to_bytes(runtime, hwoff); 22221da177e4SLinus Torvalds if (copy_to_user(buf, hwbuf, frames_to_bytes(runtime, frames))) 22231da177e4SLinus Torvalds return -EFAULT; 22241da177e4SLinus Torvalds } 22251da177e4SLinus Torvalds return 0; 22261da177e4SLinus Torvalds } 22271da177e4SLinus Torvalds 2228877211f5STakashi Iwai static snd_pcm_sframes_t snd_pcm_lib_read1(struct snd_pcm_substream *substream, 22291da177e4SLinus Torvalds unsigned long data, 22301da177e4SLinus Torvalds snd_pcm_uframes_t size, 22311da177e4SLinus Torvalds int nonblock, 22321da177e4SLinus Torvalds transfer_f transfer) 22331da177e4SLinus Torvalds { 2234877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 22351da177e4SLinus Torvalds snd_pcm_uframes_t xfer = 0; 22361da177e4SLinus Torvalds snd_pcm_uframes_t offset = 0; 22370910c216STakashi Iwai snd_pcm_uframes_t avail; 22381da177e4SLinus Torvalds int err = 0; 22391da177e4SLinus Torvalds 22401da177e4SLinus Torvalds if (size == 0) 22411da177e4SLinus Torvalds return 0; 22421da177e4SLinus Torvalds 22431da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 22441da177e4SLinus Torvalds switch (runtime->status->state) { 22451da177e4SLinus Torvalds case SNDRV_PCM_STATE_PREPARED: 22461da177e4SLinus Torvalds if (size >= runtime->start_threshold) { 22471da177e4SLinus Torvalds err = snd_pcm_start(substream); 22481da177e4SLinus Torvalds if (err < 0) 22491da177e4SLinus Torvalds goto _end_unlock; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds break; 22521da177e4SLinus Torvalds case SNDRV_PCM_STATE_DRAINING: 22531da177e4SLinus Torvalds case SNDRV_PCM_STATE_RUNNING: 22541da177e4SLinus Torvalds case SNDRV_PCM_STATE_PAUSED: 22551da177e4SLinus Torvalds break; 22561da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 22571da177e4SLinus Torvalds err = -EPIPE; 22581da177e4SLinus Torvalds goto _end_unlock; 22591da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 22601da177e4SLinus Torvalds err = -ESTRPIPE; 22611da177e4SLinus Torvalds goto _end_unlock; 22621da177e4SLinus Torvalds default: 22631da177e4SLinus Torvalds err = -EBADFD; 22641da177e4SLinus Torvalds goto _end_unlock; 22651da177e4SLinus Torvalds } 22661da177e4SLinus Torvalds 22675daeba34SDavid Dillow runtime->twake = runtime->control->avail_min ? : 1; 226831e8960bSTakashi Iwai if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) 22691da177e4SLinus Torvalds snd_pcm_update_hw_ptr(substream); 22701da177e4SLinus Torvalds avail = snd_pcm_capture_avail(runtime); 22710910c216STakashi Iwai while (size > 0) { 22720910c216STakashi Iwai snd_pcm_uframes_t frames, appl_ptr, appl_ofs; 22730910c216STakashi Iwai snd_pcm_uframes_t cont; 2274d948035aSTakashi Iwai if (!avail) { 227513075510STakashi Iwai if (runtime->status->state == 227613075510STakashi Iwai SNDRV_PCM_STATE_DRAINING) { 227713075510STakashi Iwai snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); 22781da177e4SLinus Torvalds goto _end_unlock; 22791da177e4SLinus Torvalds } 22801da177e4SLinus Torvalds if (nonblock) { 22811da177e4SLinus Torvalds err = -EAGAIN; 22821da177e4SLinus Torvalds goto _end_unlock; 22831da177e4SLinus Torvalds } 22845daeba34SDavid Dillow runtime->twake = min_t(snd_pcm_uframes_t, size, 22855daeba34SDavid Dillow runtime->control->avail_min ? : 1); 22865daeba34SDavid Dillow err = wait_for_avail(substream, &avail); 228713075510STakashi Iwai if (err < 0) 22881da177e4SLinus Torvalds goto _end_unlock; 228913075510STakashi Iwai if (!avail) 229013075510STakashi Iwai continue; /* draining */ 22911da177e4SLinus Torvalds } 22921da177e4SLinus Torvalds frames = size > avail ? avail : size; 22931da177e4SLinus Torvalds cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size; 22941da177e4SLinus Torvalds if (frames > cont) 22951da177e4SLinus Torvalds frames = cont; 22967eaa943cSTakashi Iwai if (snd_BUG_ON(!frames)) { 2297c91a988dSJaroslav Kysela runtime->twake = 0; 22987eaa943cSTakashi Iwai snd_pcm_stream_unlock_irq(substream); 22997eaa943cSTakashi Iwai return -EINVAL; 23007eaa943cSTakashi Iwai } 23011da177e4SLinus Torvalds appl_ptr = runtime->control->appl_ptr; 23021da177e4SLinus Torvalds appl_ofs = appl_ptr % runtime->buffer_size; 23031da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 23041250932eSJaroslav Kysela err = transfer(substream, appl_ofs, data, offset, frames); 23051da177e4SLinus Torvalds snd_pcm_stream_lock_irq(substream); 23061250932eSJaroslav Kysela if (err < 0) 23071250932eSJaroslav Kysela goto _end_unlock; 23081da177e4SLinus Torvalds switch (runtime->status->state) { 23091da177e4SLinus Torvalds case SNDRV_PCM_STATE_XRUN: 23101da177e4SLinus Torvalds err = -EPIPE; 23111da177e4SLinus Torvalds goto _end_unlock; 23121da177e4SLinus Torvalds case SNDRV_PCM_STATE_SUSPENDED: 23131da177e4SLinus Torvalds err = -ESTRPIPE; 23141da177e4SLinus Torvalds goto _end_unlock; 23151da177e4SLinus Torvalds default: 23161da177e4SLinus Torvalds break; 23171da177e4SLinus Torvalds } 23181da177e4SLinus Torvalds appl_ptr += frames; 23191da177e4SLinus Torvalds if (appl_ptr >= runtime->boundary) 23201da177e4SLinus Torvalds appl_ptr -= runtime->boundary; 23211da177e4SLinus Torvalds runtime->control->appl_ptr = appl_ptr; 23221da177e4SLinus Torvalds if (substream->ops->ack) 23231da177e4SLinus Torvalds substream->ops->ack(substream); 23241da177e4SLinus Torvalds 23251da177e4SLinus Torvalds offset += frames; 23261da177e4SLinus Torvalds size -= frames; 23271da177e4SLinus Torvalds xfer += frames; 23280910c216STakashi Iwai avail -= frames; 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds _end_unlock: 2331c91a988dSJaroslav Kysela runtime->twake = 0; 23321250932eSJaroslav Kysela if (xfer > 0 && err >= 0) 23331250932eSJaroslav Kysela snd_pcm_update_state(substream, runtime); 23341da177e4SLinus Torvalds snd_pcm_stream_unlock_irq(substream); 23351da177e4SLinus Torvalds return xfer > 0 ? (snd_pcm_sframes_t)xfer : err; 23361da177e4SLinus Torvalds } 23371da177e4SLinus Torvalds 2338877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __user *buf, snd_pcm_uframes_t size) 23391da177e4SLinus Torvalds { 2340877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 23411da177e4SLinus Torvalds int nonblock; 23427eaa943cSTakashi Iwai int err; 23431da177e4SLinus Torvalds 23447eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 23457eaa943cSTakashi Iwai if (err < 0) 23467eaa943cSTakashi Iwai return err; 23471da177e4SLinus Torvalds runtime = substream->runtime; 23480df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 23491da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED) 23501da177e4SLinus Torvalds return -EINVAL; 23511da177e4SLinus Torvalds return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer); 23521da177e4SLinus Torvalds } 23531da177e4SLinus Torvalds 2354e88e8ae6STakashi Iwai EXPORT_SYMBOL(snd_pcm_lib_read); 2355e88e8ae6STakashi Iwai 2356877211f5STakashi Iwai static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream, 23571da177e4SLinus Torvalds unsigned int hwoff, 23581da177e4SLinus Torvalds unsigned long data, unsigned int off, 23591da177e4SLinus Torvalds snd_pcm_uframes_t frames) 23601da177e4SLinus Torvalds { 2361877211f5STakashi Iwai struct snd_pcm_runtime *runtime = substream->runtime; 23621da177e4SLinus Torvalds int err; 23631da177e4SLinus Torvalds void __user **bufs = (void __user **)data; 23641da177e4SLinus Torvalds int channels = runtime->channels; 23651da177e4SLinus Torvalds int c; 23661da177e4SLinus Torvalds if (substream->ops->copy) { 23671da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 23681da177e4SLinus Torvalds char __user *buf; 23691da177e4SLinus Torvalds if (*bufs == NULL) 23701da177e4SLinus Torvalds continue; 23711da177e4SLinus Torvalds buf = *bufs + samples_to_bytes(runtime, off); 23721da177e4SLinus Torvalds if ((err = substream->ops->copy(substream, c, hwoff, buf, frames)) < 0) 23731da177e4SLinus Torvalds return err; 23741da177e4SLinus Torvalds } 23751da177e4SLinus Torvalds } else { 23761da177e4SLinus Torvalds snd_pcm_uframes_t dma_csize = runtime->dma_bytes / channels; 23771da177e4SLinus Torvalds for (c = 0; c < channels; ++c, ++bufs) { 23781da177e4SLinus Torvalds char *hwbuf; 23791da177e4SLinus Torvalds char __user *buf; 23801da177e4SLinus Torvalds if (*bufs == NULL) 23811da177e4SLinus Torvalds continue; 23821da177e4SLinus Torvalds 23831da177e4SLinus Torvalds hwbuf = runtime->dma_area + (c * dma_csize) + samples_to_bytes(runtime, hwoff); 23841da177e4SLinus Torvalds buf = *bufs + samples_to_bytes(runtime, off); 23851da177e4SLinus Torvalds if (copy_to_user(buf, hwbuf, samples_to_bytes(runtime, frames))) 23861da177e4SLinus Torvalds return -EFAULT; 23871da177e4SLinus Torvalds } 23881da177e4SLinus Torvalds } 23891da177e4SLinus Torvalds return 0; 23901da177e4SLinus Torvalds } 23911da177e4SLinus Torvalds 2392877211f5STakashi Iwai snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, 23931da177e4SLinus Torvalds void __user **bufs, 23941da177e4SLinus Torvalds snd_pcm_uframes_t frames) 23951da177e4SLinus Torvalds { 2396877211f5STakashi Iwai struct snd_pcm_runtime *runtime; 23971da177e4SLinus Torvalds int nonblock; 23987eaa943cSTakashi Iwai int err; 23991da177e4SLinus Torvalds 24007eaa943cSTakashi Iwai err = pcm_sanity_check(substream); 24017eaa943cSTakashi Iwai if (err < 0) 24027eaa943cSTakashi Iwai return err; 24031da177e4SLinus Torvalds runtime = substream->runtime; 24041da177e4SLinus Torvalds if (runtime->status->state == SNDRV_PCM_STATE_OPEN) 24051da177e4SLinus Torvalds return -EBADFD; 24061da177e4SLinus Torvalds 24070df63e44STakashi Iwai nonblock = !!(substream->f_flags & O_NONBLOCK); 24081da177e4SLinus Torvalds if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) 24091da177e4SLinus Torvalds return -EINVAL; 24101da177e4SLinus Torvalds return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer); 24111da177e4SLinus Torvalds } 24121da177e4SLinus Torvalds 24131da177e4SLinus Torvalds EXPORT_SYMBOL(snd_pcm_lib_readv); 24142d3391ecSTakashi Iwai 24152d3391ecSTakashi Iwai /* 24162d3391ecSTakashi Iwai * standard channel mapping helpers 24172d3391ecSTakashi Iwai */ 24182d3391ecSTakashi Iwai 24192d3391ecSTakashi Iwai /* default channel maps for multi-channel playbacks, up to 8 channels */ 24202d3391ecSTakashi Iwai const struct snd_pcm_chmap_elem snd_pcm_std_chmaps[] = { 24212d3391ecSTakashi Iwai { .channels = 1, 24225efbc261STakashi Iwai .map = { SNDRV_CHMAP_MONO } }, 24232d3391ecSTakashi Iwai { .channels = 2, 24242d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, 24252d3391ecSTakashi Iwai { .channels = 4, 24262d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24272d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, 24282d3391ecSTakashi Iwai { .channels = 6, 24292d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24302d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, 24312d3391ecSTakashi Iwai SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } }, 24322d3391ecSTakashi Iwai { .channels = 8, 24332d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24342d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, 24352d3391ecSTakashi Iwai SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, 24362d3391ecSTakashi Iwai SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, 24372d3391ecSTakashi Iwai { } 24382d3391ecSTakashi Iwai }; 24392d3391ecSTakashi Iwai EXPORT_SYMBOL_GPL(snd_pcm_std_chmaps); 24402d3391ecSTakashi Iwai 24412d3391ecSTakashi Iwai /* alternative channel maps with CLFE <-> surround swapped for 6/8 channels */ 24422d3391ecSTakashi Iwai const struct snd_pcm_chmap_elem snd_pcm_alt_chmaps[] = { 24432d3391ecSTakashi Iwai { .channels = 1, 24445efbc261STakashi Iwai .map = { SNDRV_CHMAP_MONO } }, 24452d3391ecSTakashi Iwai { .channels = 2, 24462d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } }, 24472d3391ecSTakashi Iwai { .channels = 4, 24482d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24492d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, 24502d3391ecSTakashi Iwai { .channels = 6, 24512d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24522d3391ecSTakashi Iwai SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, 24532d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } }, 24542d3391ecSTakashi Iwai { .channels = 8, 24552d3391ecSTakashi Iwai .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR, 24562d3391ecSTakashi Iwai SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE, 24572d3391ecSTakashi Iwai SNDRV_CHMAP_RL, SNDRV_CHMAP_RR, 24582d3391ecSTakashi Iwai SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } }, 24592d3391ecSTakashi Iwai { } 24602d3391ecSTakashi Iwai }; 24612d3391ecSTakashi Iwai EXPORT_SYMBOL_GPL(snd_pcm_alt_chmaps); 24622d3391ecSTakashi Iwai 24632d3391ecSTakashi Iwai static bool valid_chmap_channels(const struct snd_pcm_chmap *info, int ch) 24642d3391ecSTakashi Iwai { 24652d3391ecSTakashi Iwai if (ch > info->max_channels) 24662d3391ecSTakashi Iwai return false; 24672d3391ecSTakashi Iwai return !info->channel_mask || (info->channel_mask & (1U << ch)); 24682d3391ecSTakashi Iwai } 24692d3391ecSTakashi Iwai 24702d3391ecSTakashi Iwai static int pcm_chmap_ctl_info(struct snd_kcontrol *kcontrol, 24712d3391ecSTakashi Iwai struct snd_ctl_elem_info *uinfo) 24722d3391ecSTakashi Iwai { 24732d3391ecSTakashi Iwai struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 24742d3391ecSTakashi Iwai 24752d3391ecSTakashi Iwai uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 24762d3391ecSTakashi Iwai uinfo->count = 0; 24772d3391ecSTakashi Iwai uinfo->count = info->max_channels; 24782d3391ecSTakashi Iwai uinfo->value.integer.min = 0; 24792d3391ecSTakashi Iwai uinfo->value.integer.max = SNDRV_CHMAP_LAST; 24802d3391ecSTakashi Iwai return 0; 24812d3391ecSTakashi Iwai } 24822d3391ecSTakashi Iwai 24832d3391ecSTakashi Iwai /* get callback for channel map ctl element 24842d3391ecSTakashi Iwai * stores the channel position firstly matching with the current channels 24852d3391ecSTakashi Iwai */ 24862d3391ecSTakashi Iwai static int pcm_chmap_ctl_get(struct snd_kcontrol *kcontrol, 24872d3391ecSTakashi Iwai struct snd_ctl_elem_value *ucontrol) 24882d3391ecSTakashi Iwai { 24892d3391ecSTakashi Iwai struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 24902d3391ecSTakashi Iwai unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); 24912d3391ecSTakashi Iwai struct snd_pcm_substream *substream; 24922d3391ecSTakashi Iwai const struct snd_pcm_chmap_elem *map; 24932d3391ecSTakashi Iwai 24942d3391ecSTakashi Iwai if (snd_BUG_ON(!info->chmap)) 24952d3391ecSTakashi Iwai return -EINVAL; 24962d3391ecSTakashi Iwai substream = snd_pcm_chmap_substream(info, idx); 24972d3391ecSTakashi Iwai if (!substream) 24982d3391ecSTakashi Iwai return -ENODEV; 24992d3391ecSTakashi Iwai memset(ucontrol->value.integer.value, 0, 25002d3391ecSTakashi Iwai sizeof(ucontrol->value.integer.value)); 25012d3391ecSTakashi Iwai if (!substream->runtime) 25022d3391ecSTakashi Iwai return 0; /* no channels set */ 25032d3391ecSTakashi Iwai for (map = info->chmap; map->channels; map++) { 25042d3391ecSTakashi Iwai int i; 25052d3391ecSTakashi Iwai if (map->channels == substream->runtime->channels && 25062d3391ecSTakashi Iwai valid_chmap_channels(info, map->channels)) { 25072d3391ecSTakashi Iwai for (i = 0; i < map->channels; i++) 25082d3391ecSTakashi Iwai ucontrol->value.integer.value[i] = map->map[i]; 25092d3391ecSTakashi Iwai return 0; 25102d3391ecSTakashi Iwai } 25112d3391ecSTakashi Iwai } 25122d3391ecSTakashi Iwai return -EINVAL; 25132d3391ecSTakashi Iwai } 25142d3391ecSTakashi Iwai 25152d3391ecSTakashi Iwai /* tlv callback for channel map ctl element 25162d3391ecSTakashi Iwai * expands the pre-defined channel maps in a form of TLV 25172d3391ecSTakashi Iwai */ 25182d3391ecSTakashi Iwai static int pcm_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, 25192d3391ecSTakashi Iwai unsigned int size, unsigned int __user *tlv) 25202d3391ecSTakashi Iwai { 25212d3391ecSTakashi Iwai struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 25222d3391ecSTakashi Iwai const struct snd_pcm_chmap_elem *map; 25232d3391ecSTakashi Iwai unsigned int __user *dst; 25242d3391ecSTakashi Iwai int c, count = 0; 25252d3391ecSTakashi Iwai 25262d3391ecSTakashi Iwai if (snd_BUG_ON(!info->chmap)) 25272d3391ecSTakashi Iwai return -EINVAL; 25282d3391ecSTakashi Iwai if (size < 8) 25292d3391ecSTakashi Iwai return -ENOMEM; 25302d3391ecSTakashi Iwai if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) 25312d3391ecSTakashi Iwai return -EFAULT; 25322d3391ecSTakashi Iwai size -= 8; 25332d3391ecSTakashi Iwai dst = tlv + 2; 25342d3391ecSTakashi Iwai for (map = info->chmap; map->channels; map++) { 25352d3391ecSTakashi Iwai int chs_bytes = map->channels * 4; 25362d3391ecSTakashi Iwai if (!valid_chmap_channels(info, map->channels)) 25372d3391ecSTakashi Iwai continue; 25382d3391ecSTakashi Iwai if (size < 8) 25392d3391ecSTakashi Iwai return -ENOMEM; 25402d3391ecSTakashi Iwai if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) || 25412d3391ecSTakashi Iwai put_user(chs_bytes, dst + 1)) 25422d3391ecSTakashi Iwai return -EFAULT; 25432d3391ecSTakashi Iwai dst += 2; 25442d3391ecSTakashi Iwai size -= 8; 25452d3391ecSTakashi Iwai count += 8; 25462d3391ecSTakashi Iwai if (size < chs_bytes) 25472d3391ecSTakashi Iwai return -ENOMEM; 25482d3391ecSTakashi Iwai size -= chs_bytes; 25492d3391ecSTakashi Iwai count += chs_bytes; 25502d3391ecSTakashi Iwai for (c = 0; c < map->channels; c++) { 25512d3391ecSTakashi Iwai if (put_user(map->map[c], dst)) 25522d3391ecSTakashi Iwai return -EFAULT; 25532d3391ecSTakashi Iwai dst++; 25542d3391ecSTakashi Iwai } 25552d3391ecSTakashi Iwai } 25562d3391ecSTakashi Iwai if (put_user(count, tlv + 1)) 25572d3391ecSTakashi Iwai return -EFAULT; 25582d3391ecSTakashi Iwai return 0; 25592d3391ecSTakashi Iwai } 25602d3391ecSTakashi Iwai 25612d3391ecSTakashi Iwai static void pcm_chmap_ctl_private_free(struct snd_kcontrol *kcontrol) 25622d3391ecSTakashi Iwai { 25632d3391ecSTakashi Iwai struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); 25642d3391ecSTakashi Iwai info->pcm->streams[info->stream].chmap_kctl = NULL; 25652d3391ecSTakashi Iwai kfree(info); 25662d3391ecSTakashi Iwai } 25672d3391ecSTakashi Iwai 25682d3391ecSTakashi Iwai /** 25692d3391ecSTakashi Iwai * snd_pcm_add_chmap_ctls - create channel-mapping control elements 25702d3391ecSTakashi Iwai * @pcm: the assigned PCM instance 25712d3391ecSTakashi Iwai * @stream: stream direction 25722d3391ecSTakashi Iwai * @chmap: channel map elements (for query) 25732d3391ecSTakashi Iwai * @max_channels: the max number of channels for the stream 25742d3391ecSTakashi Iwai * @private_value: the value passed to each kcontrol's private_value field 25752d3391ecSTakashi Iwai * @info_ret: store struct snd_pcm_chmap instance if non-NULL 25762d3391ecSTakashi Iwai * 25772d3391ecSTakashi Iwai * Create channel-mapping control elements assigned to the given PCM stream(s). 2578eb7c06e8SYacine Belkadi * Return: Zero if successful, or a negative error value. 25792d3391ecSTakashi Iwai */ 25802d3391ecSTakashi Iwai int snd_pcm_add_chmap_ctls(struct snd_pcm *pcm, int stream, 25812d3391ecSTakashi Iwai const struct snd_pcm_chmap_elem *chmap, 25822d3391ecSTakashi Iwai int max_channels, 25832d3391ecSTakashi Iwai unsigned long private_value, 25842d3391ecSTakashi Iwai struct snd_pcm_chmap **info_ret) 25852d3391ecSTakashi Iwai { 25862d3391ecSTakashi Iwai struct snd_pcm_chmap *info; 25872d3391ecSTakashi Iwai struct snd_kcontrol_new knew = { 25882d3391ecSTakashi Iwai .iface = SNDRV_CTL_ELEM_IFACE_PCM, 25892d3391ecSTakashi Iwai .access = SNDRV_CTL_ELEM_ACCESS_READ | 25902d3391ecSTakashi Iwai SNDRV_CTL_ELEM_ACCESS_TLV_READ | 25912d3391ecSTakashi Iwai SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK, 25922d3391ecSTakashi Iwai .info = pcm_chmap_ctl_info, 25932d3391ecSTakashi Iwai .get = pcm_chmap_ctl_get, 25942d3391ecSTakashi Iwai .tlv.c = pcm_chmap_ctl_tlv, 25952d3391ecSTakashi Iwai }; 25962d3391ecSTakashi Iwai int err; 25972d3391ecSTakashi Iwai 25982d3391ecSTakashi Iwai info = kzalloc(sizeof(*info), GFP_KERNEL); 25992d3391ecSTakashi Iwai if (!info) 26002d3391ecSTakashi Iwai return -ENOMEM; 26012d3391ecSTakashi Iwai info->pcm = pcm; 26022d3391ecSTakashi Iwai info->stream = stream; 26032d3391ecSTakashi Iwai info->chmap = chmap; 26042d3391ecSTakashi Iwai info->max_channels = max_channels; 26052d3391ecSTakashi Iwai if (stream == SNDRV_PCM_STREAM_PLAYBACK) 26062d3391ecSTakashi Iwai knew.name = "Playback Channel Map"; 26072d3391ecSTakashi Iwai else 26082d3391ecSTakashi Iwai knew.name = "Capture Channel Map"; 26092d3391ecSTakashi Iwai knew.device = pcm->device; 26102d3391ecSTakashi Iwai knew.count = pcm->streams[stream].substream_count; 26112d3391ecSTakashi Iwai knew.private_value = private_value; 26122d3391ecSTakashi Iwai info->kctl = snd_ctl_new1(&knew, info); 26132d3391ecSTakashi Iwai if (!info->kctl) { 26142d3391ecSTakashi Iwai kfree(info); 26152d3391ecSTakashi Iwai return -ENOMEM; 26162d3391ecSTakashi Iwai } 26172d3391ecSTakashi Iwai info->kctl->private_free = pcm_chmap_ctl_private_free; 26182d3391ecSTakashi Iwai err = snd_ctl_add(pcm->card, info->kctl); 26192d3391ecSTakashi Iwai if (err < 0) 26202d3391ecSTakashi Iwai return err; 26212d3391ecSTakashi Iwai pcm->streams[stream].chmap_kctl = info->kctl; 26222d3391ecSTakashi Iwai if (info_ret) 26232d3391ecSTakashi Iwai *info_ret = info; 26242d3391ecSTakashi Iwai return 0; 26252d3391ecSTakashi Iwai } 26262d3391ecSTakashi Iwai EXPORT_SYMBOL_GPL(snd_pcm_add_chmap_ctls); 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