diff options
Diffstat (limited to 'sound/firewire')
| -rw-r--r-- | sound/firewire/motu/Makefile | 2 | ||||
| -rw-r--r-- | sound/firewire/motu/amdtp-motu.c | 84 | ||||
| -rw-r--r-- | sound/firewire/motu/motu-midi.c | 153 | ||||
| -rw-r--r-- | sound/firewire/motu/motu-stream.c | 9 | ||||
| -rw-r--r-- | sound/firewire/motu/motu.c | 7 | ||||
| -rw-r--r-- | sound/firewire/motu/motu.h | 9 |
6 files changed, 260 insertions, 4 deletions
diff --git a/sound/firewire/motu/Makefile b/sound/firewire/motu/Makefile index 508b6894826a..a512c1e0f49c 100644 --- a/sound/firewire/motu/Makefile +++ b/sound/firewire/motu/Makefile @@ -1,3 +1,3 @@ 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 diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c index 11e44123ad65..0930cd8ca2cb 100644 --- a/sound/firewire/motu/amdtp-motu.c +++ b/sound/firewire/motu/amdtp-motu.c @@ -13,6 +13,12 @@ #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; @@ -24,9 +30,18 @@ struct amdtp_motu { 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 { @@ -76,6 +91,13 @@ int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate, 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; @@ -187,12 +209,70 @@ int amdtp_motu_add_pcm_hw_constraints(struct amdtp_stream *s, 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); @@ -246,6 +326,7 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s, __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. */ @@ -253,6 +334,9 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s, /* 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); diff --git a/sound/firewire/motu/motu-midi.c b/sound/firewire/motu/motu-midi.c new file mode 100644 index 000000000000..f232f29589d0 --- /dev/null +++ b/sound/firewire/motu/motu-midi.c @@ -0,0 +1,153 @@ +/* + * 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; +} diff --git a/sound/firewire/motu/motu-stream.c b/sound/firewire/motu/motu-stream.c index 9aa698fc8da2..911d3487f775 100644 --- a/sound/firewire/motu/motu-stream.c +++ b/sound/firewire/motu/motu-stream.c @@ -28,22 +28,25 @@ 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), diff --git a/sound/firewire/motu/motu.c b/sound/firewire/motu/motu.c index 801d6a73b0f3..d4da1377fa50 100644 --- a/sound/firewire/motu/motu.c +++ b/sound/firewire/motu/motu.c @@ -103,6 +103,12 @@ static void do_registration(struct work_struct *work) 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; @@ -138,6 +144,7 @@ static int motu_probe(struct fw_unit *unit, 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); diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h index afc6de654daa..338b35193001 100644 --- a/sound/firewire/motu/motu.h +++ b/sound/firewire/motu/motu.h @@ -21,12 +21,15 @@ #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; @@ -38,6 +41,7 @@ struct snd_motu { struct snd_card *card; struct fw_unit *unit; struct mutex mutex; + spinlock_t lock; bool registered; struct delayed_work dwork; @@ -113,9 +117,12 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit, 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); @@ -133,4 +140,6 @@ void snd_motu_stream_stop_duplex(struct snd_motu *motu); 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 |