linux/sound/firewire/oxfw/oxfw-midi.c
Takashi Sakamoto 3299d2a0f7 ALSA: oxfw: share PCM buffer size for both direction
This commit allows ALSA oxfw driver to share PCM buffer size for both
capture and playback PCM substream. When AMDTP domain starts for one
of the PCM substream, buffer size of the PCM substream is stores to
AMDTP domain structure. Some AMDTP streams have already run with the
buffer size when another PCM substream starts, therefore the PCM
substream has a constraint to its buffer size.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191017155424.885-5-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-10-18 04:35:46 +02:00

195 lines
4.3 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* oxfw_midi.c - a part of driver for OXFW970/971 based devices
*
* Copyright (c) 2014 Takashi Sakamoto
*/
#include "oxfw.h"
static int midi_capture_open(struct snd_rawmidi_substream *substream)
{
struct snd_oxfw *oxfw = substream->rmidi->private_data;
int err;
err = snd_oxfw_stream_lock_try(oxfw);
if (err < 0)
return err;
mutex_lock(&oxfw->mutex);
err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->tx_stream, 0, 0, 0, 0);
if (err >= 0) {
++oxfw->substreams_count;
err = snd_oxfw_stream_start_duplex(oxfw);
if (err < 0)
--oxfw->substreams_count;
}
mutex_unlock(&oxfw->mutex);
if (err < 0)
snd_oxfw_stream_lock_release(oxfw);
return err;
}
static int midi_playback_open(struct snd_rawmidi_substream *substream)
{
struct snd_oxfw *oxfw = substream->rmidi->private_data;
int err;
err = snd_oxfw_stream_lock_try(oxfw);
if (err < 0)
return err;
mutex_lock(&oxfw->mutex);
err = snd_oxfw_stream_reserve_duplex(oxfw, &oxfw->rx_stream, 0, 0, 0, 0);
if (err >= 0) {
++oxfw->substreams_count;
err = snd_oxfw_stream_start_duplex(oxfw);
}
mutex_unlock(&oxfw->mutex);
if (err < 0)
snd_oxfw_stream_lock_release(oxfw);
return err;
}
static int midi_capture_close(struct snd_rawmidi_substream *substream)
{
struct snd_oxfw *oxfw = substream->rmidi->private_data;
mutex_lock(&oxfw->mutex);
--oxfw->substreams_count;
snd_oxfw_stream_stop_duplex(oxfw);
mutex_unlock(&oxfw->mutex);
snd_oxfw_stream_lock_release(oxfw);
return 0;
}
static int midi_playback_close(struct snd_rawmidi_substream *substream)
{
struct snd_oxfw *oxfw = substream->rmidi->private_data;
mutex_lock(&oxfw->mutex);
--oxfw->substreams_count;
snd_oxfw_stream_stop_duplex(oxfw);
mutex_unlock(&oxfw->mutex);
snd_oxfw_stream_lock_release(oxfw);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_oxfw *oxfw = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&oxfw->lock, flags);
if (up)
amdtp_am824_midi_trigger(&oxfw->tx_stream,
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&oxfw->tx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&oxfw->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_oxfw *oxfw = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&oxfw->lock, flags);
if (up)
amdtp_am824_midi_trigger(&oxfw->rx_stream,
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&oxfw->rx_stream,
substrm->number, NULL);
spin_unlock_irqrestore(&oxfw->lock, flags);
}
static void set_midi_substream_names(struct snd_oxfw *oxfw,
struct snd_rawmidi_str *str)
{
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d",
oxfw->card->shortname, subs->number + 1);
}
}
int snd_oxfw_create_midi(struct snd_oxfw *oxfw)
{
static const struct snd_rawmidi_ops capture_ops = {
.open = midi_capture_open,
.close = midi_capture_close,
.trigger = midi_capture_trigger,
};
static const struct snd_rawmidi_ops playback_ops = {
.open = midi_playback_open,
.close = midi_playback_close,
.trigger = midi_playback_trigger,
};
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *str;
int err;
if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0)
return 0;
/* create midi ports */
err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0,
oxfw->midi_output_ports, oxfw->midi_input_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", oxfw->card->shortname);
rmidi->private_data = oxfw;
if (oxfw->midi_input_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(oxfw, str);
}
if (oxfw->midi_output_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(oxfw, str);
}
if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0))
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}