From 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:46:07 +0000
Subject: [PATCH] add audio
---
kernel/sound/firewire/tascam/tascam-pcm.c | 131 ++++++++++++++++++++-----------------------
1 files changed, 60 insertions(+), 71 deletions(-)
diff --git a/kernel/sound/firewire/tascam/tascam-pcm.c b/kernel/sound/firewire/tascam/tascam-pcm.c
index 9e58633..36c1353 100644
--- a/kernel/sound/firewire/tascam/tascam-pcm.c
+++ b/kernel/sound/firewire/tascam/tascam-pcm.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* tascam-pcm.c - a part of driver for TASCAM FireWire series
*
* Copyright (c) 2015 Takashi Sakamoto
- *
- * Licensed under the terms of the GNU General Public License, version 2.
*/
#include "tascam.h"
@@ -44,13 +43,13 @@
static int pcm_open(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
+ struct amdtp_domain *d = &tscm->domain;
enum snd_tscm_clock clock;
- unsigned int rate;
int err;
err = snd_tscm_stream_lock_try(tscm);
if (err < 0)
- goto end;
+ return err;
err = pcm_init_hw_params(tscm, substream);
if (err < 0)
@@ -60,19 +59,46 @@
if (err < 0)
goto err_locked;
- if (clock != SND_TSCM_CLOCK_INTERNAL ||
- amdtp_stream_pcm_running(&tscm->rx_stream) ||
- amdtp_stream_pcm_running(&tscm->tx_stream)) {
+ mutex_lock(&tscm->mutex);
+
+ // When source of clock is not internal or any stream is reserved for
+ // transmission of PCM frames, the available sampling rate is limited
+ // at current one.
+ if (clock != SND_TSCM_CLOCK_INTERNAL || tscm->substreams_counter > 0) {
+ unsigned int frames_per_period = d->events_per_period;
+ unsigned int frames_per_buffer = d->events_per_buffer;
+ unsigned int rate;
+
err = snd_tscm_stream_get_rate(tscm, &rate);
- if (err < 0)
+ if (err < 0) {
+ mutex_unlock(&tscm->mutex);
goto err_locked;
+ }
substream->runtime->hw.rate_min = rate;
substream->runtime->hw.rate_max = rate;
+
+ err = snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
+ frames_per_period, frames_per_period);
+ if (err < 0) {
+ mutex_unlock(&tscm->mutex);
+ goto err_locked;
+ }
+
+ err = snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+ frames_per_buffer, frames_per_buffer);
+ if (err < 0) {
+ mutex_unlock(&tscm->mutex);
+ goto err_locked;
+ }
}
+ mutex_unlock(&tscm->mutex);
+
snd_pcm_set_sync(substream);
-end:
- return err;
+
+ return 0;
err_locked:
snd_tscm_stream_lock_release(tscm);
return err;
@@ -87,76 +113,42 @@
return 0;
}
-static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
+static int pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
{
struct snd_tscm *tscm = substream->private_data;
- int err;
-
- err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
- params_buffer_bytes(hw_params));
- if (err < 0)
- return err;
+ int err = 0;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
+ unsigned int rate = params_rate(hw_params);
+ unsigned int frames_per_period = params_period_size(hw_params);
+ unsigned int frames_per_buffer = params_buffer_size(hw_params);
+
mutex_lock(&tscm->mutex);
- tscm->substreams_counter++;
+ err = snd_tscm_stream_reserve_duplex(tscm, rate,
+ frames_per_period, frames_per_buffer);
+ if (err >= 0)
+ ++tscm->substreams_counter;
mutex_unlock(&tscm->mutex);
}
- return 0;
+ return err;
}
-static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct snd_tscm *tscm = 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(&tscm->mutex);
- tscm->substreams_counter++;
- mutex_unlock(&tscm->mutex);
- }
-
- return 0;
-}
-
-static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
+static int pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
mutex_lock(&tscm->mutex);
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
- tscm->substreams_counter--;
+ --tscm->substreams_counter;
snd_tscm_stream_stop_duplex(tscm);
mutex_unlock(&tscm->mutex);
- return snd_pcm_lib_free_vmalloc_buffer(substream);
-}
-
-static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_tscm *tscm = substream->private_data;
-
- mutex_lock(&tscm->mutex);
-
- if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
- tscm->substreams_counter--;
-
- snd_tscm_stream_stop_duplex(tscm);
-
- mutex_unlock(&tscm->mutex);
-
- return snd_pcm_lib_free_vmalloc_buffer(substream);
+ return 0;
}
static int pcm_capture_prepare(struct snd_pcm_substream *substream)
@@ -233,28 +225,28 @@
{
struct snd_tscm *tscm = sbstrm->private_data;
- return amdtp_stream_pcm_pointer(&tscm->tx_stream);
+ return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->tx_stream);
}
static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
{
struct snd_tscm *tscm = sbstrm->private_data;
- return amdtp_stream_pcm_pointer(&tscm->rx_stream);
+ return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->rx_stream);
}
static int pcm_capture_ack(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
- return amdtp_stream_pcm_ack(&tscm->tx_stream);
+ return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->tx_stream);
}
static int pcm_playback_ack(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
- return amdtp_stream_pcm_ack(&tscm->rx_stream);
+ return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->rx_stream);
}
int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
@@ -262,26 +254,22 @@
static const struct snd_pcm_ops 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,
+ .hw_params = pcm_hw_params,
+ .hw_free = pcm_hw_free,
.prepare = pcm_capture_prepare,
.trigger = pcm_capture_trigger,
.pointer = pcm_capture_pointer,
.ack = pcm_capture_ack,
- .page = snd_pcm_lib_get_vmalloc_page,
};
static const struct snd_pcm_ops 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,
+ .hw_params = pcm_hw_params,
+ .hw_free = pcm_hw_free,
.prepare = pcm_playback_prepare,
.trigger = pcm_playback_trigger,
.pointer = pcm_playback_pointer,
.ack = pcm_playback_ack,
- .page = snd_pcm_lib_get_vmalloc_page,
};
struct snd_pcm *pcm;
int err;
@@ -295,6 +283,7 @@
"%s PCM", tscm->card->shortname);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
+ snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
return 0;
}
--
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