snd-firewire-motu-objs := motu.o amdtp-motu.o motu-transaction.o motu-stream.o \
- motu-proc.o motu-pcm.o
+ motu-proc.o motu-pcm.o motu-midi.o
obj-$(CONFIG_SND_FIREWIRE_MOTU) += snd-firewire-motu.o
#define CIP_FMT_MOTU 0x02
#define MOTU_FDF_AM824 0x22
+/*
+ * Nominally 3125 bytes/second, but the MIDI port's clock might be
+ * 1% too slow, and the bus clock 100 ppm too fast.
+ */
+#define MIDI_BYTES_PER_SECOND 3093
+
struct amdtp_motu {
/* For timestamp processing. */
unsigned int quotient_ticks_per_event;
unsigned int pcm_chunks;
unsigned int pcm_byte_offset;
+
+ struct snd_rawmidi_substream *midi;
+ unsigned int midi_ports;
+ unsigned int midi_flag_offset;
+ unsigned int midi_byte_offset;
+
+ int midi_db_count;
+ unsigned int midi_db_interval;
};
int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
+ unsigned int midi_ports,
struct snd_motu_packet_format *formats)
{
static const struct {
p->pcm_chunks = pcm_chunks;
p->pcm_byte_offset = formats->pcm_byte_offset;
+ p->midi_ports = midi_ports;
+ p->midi_flag_offset = formats->midi_flag_offset;
+ p->midi_byte_offset = formats->midi_byte_offset;
+
+ p->midi_db_count = 0;
+ p->midi_db_interval = rate / MIDI_BYTES_PER_SECOND;
+
/* IEEE 1394 bus requires. */
delay = 0x2e00;
return amdtp_stream_add_pcm_hw_constraints(s, runtime);
}
+void amdtp_motu_midi_trigger(struct amdtp_stream *s, unsigned int port,
+ struct snd_rawmidi_substream *midi)
+{
+ struct amdtp_motu *p = s->protocol;
+
+ if (port < p->midi_ports)
+ WRITE_ONCE(p->midi, midi);
+}
+
+static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
+ unsigned int data_blocks)
+{
+ struct amdtp_motu *p = s->protocol;
+ struct snd_rawmidi_substream *midi = READ_ONCE(p->midi);
+ u8 *b;
+ int i;
+
+ for (i = 0; i < data_blocks; i++) {
+ b = (u8 *)buffer;
+
+ if (midi && p->midi_db_count == 0 &&
+ snd_rawmidi_transmit(midi, b + p->midi_byte_offset, 1) == 1) {
+ b[p->midi_flag_offset] = 0x01;
+ } else {
+ b[p->midi_byte_offset] = 0x00;
+ b[p->midi_flag_offset] = 0x00;
+ }
+
+ buffer += s->data_block_quadlets;
+
+ if (--p->midi_db_count < 0)
+ p->midi_db_count = p->midi_db_interval;
+ }
+}
+
+static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
+ unsigned int data_blocks)
+{
+ struct amdtp_motu *p = s->protocol;
+ struct snd_rawmidi_substream *midi;
+ u8 *b;
+ int i;
+
+ for (i = 0; i < data_blocks; i++) {
+ b = (u8 *)buffer;
+ midi = READ_ONCE(p->midi);
+
+ if (midi && (b[p->midi_flag_offset] & 0x01))
+ snd_rawmidi_receive(midi, b + p->midi_byte_offset, 1);
+
+ buffer += s->data_block_quadlets;
+ }
+}
+
static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
__be32 *buffer, unsigned int data_blocks,
unsigned int *syt)
{
+ struct amdtp_motu *p = s->protocol;
struct snd_pcm_substream *pcm;
+ if (p->midi_ports)
+ read_midi_messages(s, buffer, data_blocks);
+
pcm = ACCESS_ONCE(s->pcm);
if (data_blocks > 0 && pcm)
read_pcm_s32(s, pcm->runtime, buffer, data_blocks);
__be32 *buffer, unsigned int data_blocks,
unsigned int *syt)
{
+ struct amdtp_motu *p = (struct amdtp_motu *)s->protocol;
struct snd_pcm_substream *pcm;
/* Not used. */
/* TODO: how to interact control messages between userspace? */
+ if (p->midi_ports)
+ write_midi_messages(s, buffer, data_blocks);
+
pcm = ACCESS_ONCE(s->pcm);
if (pcm)
write_pcm_s32(s, pcm->runtime, buffer, data_blocks);
--- /dev/null
+/*
+ * motu-midi.h - a part of driver for MOTU FireWire series
+ *
+ * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+#include "motu.h"
+
+static int midi_capture_open(struct snd_rawmidi_substream *substream)
+{
+ struct snd_motu *motu = substream->rmidi->private_data;
+ int err;
+
+ mutex_lock(&motu->mutex);
+
+ motu->capture_substreams++;
+ err = snd_motu_stream_start_duplex(motu, 0);
+
+ mutex_unlock(&motu->mutex);
+
+ return err;
+}
+
+static int midi_playback_open(struct snd_rawmidi_substream *substream)
+{
+ struct snd_motu *motu = substream->rmidi->private_data;
+ int err;
+
+ mutex_lock(&motu->mutex);
+
+ motu->playback_substreams++;
+ err = snd_motu_stream_start_duplex(motu, 0);
+
+ mutex_unlock(&motu->mutex);
+
+ return err;
+}
+
+static int midi_capture_close(struct snd_rawmidi_substream *substream)
+{
+ struct snd_motu *motu = substream->rmidi->private_data;
+
+ mutex_lock(&motu->mutex);
+
+ motu->capture_substreams--;
+ snd_motu_stream_stop_duplex(motu);
+
+ mutex_unlock(&motu->mutex);
+
+ return 0;
+}
+
+static int midi_playback_close(struct snd_rawmidi_substream *substream)
+{
+ struct snd_motu *motu = substream->rmidi->private_data;
+
+ mutex_lock(&motu->mutex);
+
+ motu->playback_substreams--;
+ snd_motu_stream_stop_duplex(motu);
+
+ mutex_unlock(&motu->mutex);
+
+ return 0;
+}
+
+static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
+{
+ struct snd_motu *motu = substrm->rmidi->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&motu->lock, flags);
+
+ if (up)
+ amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
+ substrm);
+ else
+ amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
+ NULL);
+
+ spin_unlock_irqrestore(&motu->lock, flags);
+}
+
+static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
+{
+ struct snd_motu *motu = substrm->rmidi->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&motu->lock, flags);
+
+ if (up)
+ amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
+ substrm);
+ else
+ amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
+ NULL);
+
+ spin_unlock_irqrestore(&motu->lock, flags);
+}
+
+static void set_midi_substream_names(struct snd_motu *motu,
+ 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", motu->card->shortname, subs->number + 1);
+ }
+}
+
+int snd_motu_create_midi_devices(struct snd_motu *motu)
+{
+ static struct snd_rawmidi_ops capture_ops = {
+ .open = midi_capture_open,
+ .close = midi_capture_close,
+ .trigger = midi_capture_trigger,
+ };
+ static 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;
+
+ /* create midi ports */
+ err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi);
+ if (err < 0)
+ return err;
+
+ snprintf(rmidi->name, sizeof(rmidi->name),
+ "%s MIDI", motu->card->shortname);
+ rmidi->private_data = motu;
+
+ rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
+ SNDRV_RAWMIDI_INFO_OUTPUT |
+ SNDRV_RAWMIDI_INFO_DUPLEX;
+
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &capture_ops);
+ str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
+ set_midi_substream_names(motu, str);
+
+ snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
+ &playback_ops);
+ str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
+ set_midi_substream_names(motu, str);
+
+ return 0;
+}
static int start_both_streams(struct snd_motu *motu, unsigned int rate)
{
+ unsigned int midi_ports = 0;
__be32 reg;
u32 data;
int err;
+ if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI)
+ midi_ports = 1;
+
/* Set packet formation to our packet streaming engine. */
- err = amdtp_motu_set_parameters(&motu->rx_stream, rate,
+ err = amdtp_motu_set_parameters(&motu->rx_stream, rate, midi_ports,
&motu->rx_packet_formats);
if (err < 0)
return err;
- err = amdtp_motu_set_parameters(&motu->tx_stream, rate,
+ err = amdtp_motu_set_parameters(&motu->tx_stream, rate, midi_ports,
&motu->tx_packet_formats);
if (err < 0)
return err;
-
/* Get isochronous resources on the bus. */
err = fw_iso_resources_allocate(&motu->rx_resources,
amdtp_stream_get_max_payload(&motu->rx_stream),
if (err < 0)
goto error;
+ if (motu->spec->flags & SND_MOTU_SPEC_HAS_MIDI) {
+ err = snd_motu_create_midi_devices(motu);
+ if (err < 0)
+ goto error;
+ }
+
err = snd_card_register(motu->card);
if (err < 0)
goto error;
dev_set_drvdata(&unit->device, motu);
mutex_init(&motu->mutex);
+ spin_lock_init(&motu->lock);
/* Allocate and register this sound card later. */
INIT_DEFERRABLE_WORK(&motu->dwork, do_registration);
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/info.h>
+#include <sound/rawmidi.h>
#include "../lib.h"
#include "../amdtp-stream.h"
#include "../iso-resources.h"
struct snd_motu_packet_format {
+ unsigned char midi_flag_offset;
+ unsigned char midi_byte_offset;
unsigned char pcm_byte_offset;
unsigned char msg_chunks;
struct snd_card *card;
struct fw_unit *unit;
struct mutex mutex;
+ spinlock_t lock;
bool registered;
struct delayed_work dwork;
enum amdtp_stream_direction dir,
const struct snd_motu_protocol *const protocol);
int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
+ unsigned int midi_ports,
struct snd_motu_packet_format *formats);
int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s,
struct snd_pcm_runtime *runtime);
+void amdtp_motu_midi_trigger(struct amdtp_stream *s, unsigned int port,
+ struct snd_rawmidi_substream *midi);
int snd_motu_transaction_read(struct snd_motu *motu, u32 offset, __be32 *reg,
size_t size);
void snd_motu_proc_init(struct snd_motu *motu);
int snd_motu_create_pcm_devices(struct snd_motu *motu);
+
+int snd_motu_create_midi_devices(struct snd_motu *motu);
#endif
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