cregit-Linux how code gets into the kernel

Release 4.8 sound/firewire/bebob/bebob_pcm.c

/*
 * bebob_pcm.c - a part of driver for BeBoB based devices
 *
 * Copyright (c) 2013-2014 Takashi Sakamoto
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */

#include "./bebob.h"


static int hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_bebob_stream_formation *formations = rule->private; struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); const struct snd_interval *c = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct snd_interval t = { .min = UINT_MAX, .max = 0, .integer = 1 }; unsigned int i; for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { /* entry is invalid */ if (formations[i].pcm == 0) continue; if (!snd_interval_test(c, formations[i].pcm)) continue; t.min = min(t.min, snd_bebob_rate_table[i]); t.max = max(t.max, snd_bebob_rate_table[i]); } return snd_interval_refine(r, &t); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto160100.00%1100.00%
Total160100.00%1100.00%


static int hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_bebob_stream_formation *formations = rule->private; struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); const struct snd_interval *r = hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval t = { .min = UINT_MAX, .max = 0, .integer = 1 }; unsigned int i; for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { /* entry is invalid */ if (formations[i].pcm == 0) continue; if (!snd_interval_test(r, snd_bebob_rate_table[i])) continue; t.min = min(t.min, formations[i].pcm); t.max = max(t.max, formations[i].pcm); } return snd_interval_refine(c, &t); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto162100.00%1100.00%
Total162100.00%1100.00%


static void limit_channels_and_rates(struct snd_pcm_hardware *hw, struct snd_bebob_stream_formation *formations) { unsigned int i; hw->channels_min = UINT_MAX; hw->channels_max = 0; hw->rate_min = UINT_MAX; hw->rate_max = 0; hw->rates = 0; for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; i++) { /* entry has no PCM channels */ if (formations[i].pcm == 0) continue; hw->channels_min = min(hw->channels_min, formations[i].pcm); hw->channels_max = max(hw->channels_max, formations[i].pcm); hw->rate_min = min(hw->rate_min, snd_bebob_rate_table[i]); hw->rate_max = max(hw->rate_max, snd_bebob_rate_table[i]); hw->rates |= snd_pcm_rate_to_rate_bit(snd_bebob_rate_table[i]); } }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto158100.00%1100.00%
Total158100.00%1100.00%


static void limit_period_and_buffer(struct snd_pcm_hardware *hw) { hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */ hw->periods_max = UINT_MAX; hw->period_bytes_min = 4 * hw->channels_max; /* bytes for a frame */ /* Just to prevent from allocating much pages. */ hw->period_bytes_max = hw->period_bytes_min * 2048; hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto58100.00%1100.00%
Total58100.00%1100.00%


static int pcm_init_hw_params(struct snd_bebob *bebob, struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct amdtp_stream *s; struct snd_bebob_stream_formation *formations; int err; runtime->hw.info = SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_JOINT_DUPLEX | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID; if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { runtime->hw.formats = AM824_IN_PCM_FORMAT_BITS; s = &bebob->tx_stream; formations = bebob->tx_stream_formations; } else { runtime->hw.formats = AM824_OUT_PCM_FORMAT_BITS; s = &bebob->rx_stream; formations = bebob->rx_stream_formations; } limit_channels_and_rates(&runtime->hw, formations); limit_period_and_buffer(&runtime->hw); err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, hw_rule_channels, formations, SNDRV_PCM_HW_PARAM_RATE, -1); if (err < 0) goto end; err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, hw_rule_rate, formations, SNDRV_PCM_HW_PARAM_CHANNELS, -1); if (err < 0) goto end; err = amdtp_am824_add_pcm_hw_constraints(s, runtime); end: return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto201100.00%3100.00%
Total201100.00%3100.00%


static int pcm_open(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; const struct snd_bebob_rate_spec *spec = bebob->spec->rate; unsigned int sampling_rate; enum snd_bebob_clock_type src; int err; err = snd_bebob_stream_lock_try(bebob); if (err < 0) goto end; err = pcm_init_hw_params(bebob, substream); if (err < 0) goto err_locked; err = snd_bebob_stream_get_clock_src(bebob, &src); if (err < 0) goto err_locked; /* * When source of clock is internal or any PCM stream are running, * the available sampling rate is limited at current sampling rate. */ if (src == SND_BEBOB_CLOCK_TYPE_EXTERNAL || amdtp_stream_pcm_running(&bebob->tx_stream) || amdtp_stream_pcm_running(&bebob->rx_stream)) { err = spec->get(bebob, &sampling_rate); if (err < 0) { dev_err(&bebob->unit->device, "fail to get sampling rate: %d\n", err); goto err_locked; } substream->runtime->hw.rate_min = sampling_rate; substream->runtime->hw.rate_max = sampling_rate; } snd_pcm_set_sync(substream); end: return err; err_locked: snd_bebob_stream_lock_release(bebob); return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto19799.49%480.00%
julia lawalljulia lawall10.51%120.00%
Total198100.00%5100.00%


static int pcm_close(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; snd_bebob_stream_lock_release(bebob); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto28100.00%2100.00%
Total28100.00%2100.00%


static int pcm_capture_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_bebob *bebob = substream->private_data; int err; err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { mutex_lock(&bebob->mutex); bebob->substreams_counter++; mutex_unlock(&bebob->mutex); } amdtp_am824_set_pcm_format(&bebob->tx_stream, params_format(hw_params)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto100100.00%6100.00%
Total100100.00%6100.00%


static int pcm_playback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_bebob *bebob = substream->private_data; int err; err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { mutex_lock(&bebob->mutex); bebob->substreams_counter++; mutex_unlock(&bebob->mutex); } amdtp_am824_set_pcm_format(&bebob->rx_stream, params_format(hw_params)); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto100100.00%6100.00%
Total100100.00%6100.00%


static int pcm_capture_hw_free(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { mutex_lock(&bebob->mutex); bebob->substreams_counter--; mutex_unlock(&bebob->mutex); } snd_bebob_stream_stop_duplex(bebob); return snd_pcm_lib_free_vmalloc_buffer(substream); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto66100.00%4100.00%
Total66100.00%4100.00%


static int pcm_playback_hw_free(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) { mutex_lock(&bebob->mutex); bebob->substreams_counter--; mutex_unlock(&bebob->mutex); } snd_bebob_stream_stop_duplex(bebob); return snd_pcm_lib_free_vmalloc_buffer(substream); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto66100.00%4100.00%
Total66100.00%4100.00%


static int pcm_capture_prepare(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; int err; err = snd_bebob_stream_start_duplex(bebob, runtime->rate); if (err >= 0) amdtp_stream_pcm_prepare(&bebob->tx_stream); return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto60100.00%1100.00%
Total60100.00%1100.00%


static int pcm_playback_prepare(struct snd_pcm_substream *substream) { struct snd_bebob *bebob = substream->private_data; struct snd_pcm_runtime *runtime = substream->runtime; int err; err = snd_bebob_stream_start_duplex(bebob, runtime->rate); if (err >= 0) amdtp_stream_pcm_prepare(&bebob->rx_stream); return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto60100.00%1100.00%
Total60100.00%1100.00%


static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_bebob *bebob = substream->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: amdtp_stream_pcm_trigger(&bebob->tx_stream, substream); break; case SNDRV_PCM_TRIGGER_STOP: amdtp_stream_pcm_trigger(&bebob->tx_stream, NULL); break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto65100.00%1100.00%
Total65100.00%1100.00%


static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_bebob *bebob = substream->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: amdtp_stream_pcm_trigger(&bebob->rx_stream, substream); break; case SNDRV_PCM_TRIGGER_STOP: amdtp_stream_pcm_trigger(&bebob->rx_stream, NULL); break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto65100.00%1100.00%
Total65100.00%1100.00%


static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm) { struct snd_bebob *bebob = sbstrm->private_data; return amdtp_stream_pcm_pointer(&bebob->tx_stream); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto29100.00%1100.00%
Total29100.00%1100.00%


static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm) { struct snd_bebob *bebob = sbstrm->private_data; return amdtp_stream_pcm_pointer(&bebob->rx_stream); }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto29100.00%1100.00%
Total29100.00%1100.00%

static const struct snd_pcm_ops pcm_capture_ops = { .open = pcm_open, .close = pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = pcm_capture_hw_params, .hw_free = pcm_capture_hw_free, .prepare = pcm_capture_prepare, .trigger = pcm_capture_trigger, .pointer = pcm_capture_pointer, .page = snd_pcm_lib_get_vmalloc_page, }; static const struct snd_pcm_ops pcm_playback_ops = { .open = pcm_open, .close = pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = pcm_playback_hw_params, .hw_free = pcm_playback_hw_free, .prepare = pcm_playback_prepare, .trigger = pcm_playback_trigger, .pointer = pcm_playback_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, };
int snd_bebob_create_pcm_devices(struct snd_bebob *bebob) { struct snd_pcm *pcm; int err; err = snd_pcm_new(bebob->card, bebob->card->driver, 0, 1, 1, &pcm); if (err < 0) goto end; pcm->private_data = bebob; snprintf(pcm->name, sizeof(pcm->name), "%s PCM", bebob->card->shortname); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops); end: return err; }

Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto104100.00%1100.00%
Total104100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
takashi sakamototakashi sakamoto182399.95%1191.67%
julia lawalljulia lawall10.05%18.33%
Total1824100.00%12100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.