[alsa-devel] [PATCH 16/25] ALSA: firewire-digi00x: add support for MIDI ports for machine control
Takashi Sakamoto
o-takashi at sakamocchi.jp
Sat Aug 22 11:19:32 CEST 2015
Digi 002/003 family uses asynchronous transactions for MIDI messages to
control the devices. The address to receive the messages is 0xffffe0000040.
This commit supports these MIDI ports.
Cc: Damien Zammit <damien at zamaudio.com>
Cc: Robin Gareus <robin at gareus.org>
Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>
---
sound/firewire/digi00x/digi00x-midi.c | 65 ++++++++++++++++++++------
sound/firewire/digi00x/digi00x-transaction.c | 70 +++++++++++++++++++++++++---
sound/firewire/digi00x/digi00x.h | 5 ++
3 files changed, 118 insertions(+), 22 deletions(-)
diff --git a/sound/firewire/digi00x/digi00x-midi.c b/sound/firewire/digi00x/digi00x-midi.c
index 241d93a..9051902 100644
--- a/sound/firewire/digi00x/digi00x-midi.c
+++ b/sound/firewire/digi00x/digi00x-midi.c
@@ -13,6 +13,10 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream)
struct snd_dg00x *dg00x = substream->rmidi->private_data;
int err;
+ /* This port is for Asynchronous transaction. */
+ if (substream->number == 0)
+ return 0;
+
err = snd_dg00x_stream_lock_try(dg00x);
if (err < 0)
return err;
@@ -32,6 +36,10 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream)
struct snd_dg00x *dg00x = substream->rmidi->private_data;
int err;
+ /* This port is for Asynchronous transaction. */
+ if (substream->number == 0)
+ return 0;
+
err = snd_dg00x_stream_lock_try(dg00x);
if (err < 0)
return err;
@@ -50,6 +58,9 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream)
{
struct snd_dg00x *dg00x = substream->rmidi->private_data;
+ if (substream->number == 0)
+ return 0;
+
mutex_lock(&dg00x->mutex);
dg00x->substreams_counter--;
snd_dg00x_stream_stop_duplex(dg00x);
@@ -63,6 +74,11 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream)
{
struct snd_dg00x *dg00x = substream->rmidi->private_data;
+ if (substream->number == 0) {
+ snd_fw_async_midi_port_finish(&dg00x->out_control);
+ return 0;
+ }
+
mutex_lock(&dg00x->mutex);
dg00x->substreams_counter--;
snd_dg00x_stream_stop_duplex(dg00x);
@@ -79,12 +95,19 @@ static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
spin_lock_irqsave(&dg00x->lock, flags);
- if (up)
- amdtp_dot_midi_trigger(&dg00x->tx_stream,
- substrm->number - 1, substrm);
- else
- amdtp_dot_midi_trigger(&dg00x->tx_stream,
- substrm->number - 1, NULL);
+ if (substrm->number == 0) {
+ if (up)
+ dg00x->in_control = substrm;
+ else
+ dg00x->in_control = NULL;
+ } else {
+ if (up)
+ amdtp_dot_midi_trigger(&dg00x->tx_stream,
+ substrm->number - 1, substrm);
+ else
+ amdtp_dot_midi_trigger(&dg00x->tx_stream,
+ substrm->number - 1, NULL);
+ }
spin_unlock_irqrestore(&dg00x->lock, flags);
}
@@ -96,12 +119,18 @@ static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
spin_lock_irqsave(&dg00x->lock, flags);
- if (up)
- amdtp_dot_midi_trigger(&dg00x->rx_stream,
- substrm->number - 1, substrm);
- else
- amdtp_dot_midi_trigger(&dg00x->rx_stream,
- substrm->number - 1, NULL);
+ if (substrm->number == 0) {
+ if (up)
+ snd_fw_async_midi_port_run(&dg00x->out_control,
+ substrm);
+ } else {
+ if (up)
+ amdtp_dot_midi_trigger(&dg00x->rx_stream,
+ substrm->number - 1, substrm);
+ else
+ amdtp_dot_midi_trigger(&dg00x->rx_stream,
+ substrm->number - 1, NULL);
+ }
spin_unlock_irqrestore(&dg00x->lock, flags);
}
@@ -124,9 +153,15 @@ static void set_midi_substream_names(struct snd_dg00x *dg00x,
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
- snprintf(subs->name, sizeof(subs->name),
- "%s MIDI %d",
- dg00x->card->shortname, subs->number);
+ /* This port is for device control. */
+ if (subs->number == 0) {
+ snprintf(subs->name, sizeof(subs->name),
+ "%s control", dg00x->card->shortname);
+ } else {
+ snprintf(subs->name, sizeof(subs->name),
+ "%s MIDI %d",
+ dg00x->card->shortname, subs->number);
+ }
}
}
diff --git a/sound/firewire/digi00x/digi00x-transaction.c b/sound/firewire/digi00x/digi00x-transaction.c
index 4568d98..5c66b17 100644
--- a/sound/firewire/digi00x/digi00x-transaction.c
+++ b/sound/firewire/digi00x/digi00x-transaction.c
@@ -9,6 +9,18 @@
#include <sound/asound.h>
#include "digi00x.h"
+static int packetize_message(struct snd_rawmidi_substream *substream, __u8 *buf)
+{
+ int bytes;
+
+ buf[0] = 0x80;
+ bytes = snd_rawmidi_transmit_peek(substream, buf + 1, 2);
+ if (bytes >= 0)
+ buf[3] = 0xc0 | bytes;
+
+ return bytes;
+}
+
static void handle_unknown_message(struct snd_dg00x *dg00x,
unsigned long long offset, u32 *buf)
{
@@ -21,6 +33,28 @@ static void handle_unknown_message(struct snd_dg00x *dg00x,
wake_up(&dg00x->hwdep_wait);
}
+static void handle_midi_control(struct snd_dg00x *dg00x, u32 *buf,
+ unsigned int length)
+{
+ struct snd_rawmidi_substream *substream;
+ unsigned int i;
+ unsigned int len;
+ u8 *b;
+
+ substream = ACCESS_ONCE(dg00x->in_control);
+ if (substream == NULL)
+ return;
+
+ length /= 4;
+
+ for (i = 0; i < length; i++) {
+ b = (u8 *)&buf[i];
+ len = b[3] & 0xf;
+ if (len > 0)
+ snd_rawmidi_receive(dg00x->in_control, b + 1, len);
+ }
+}
+
static void handle_message(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
int generation, unsigned long long offset,
@@ -31,6 +65,8 @@ static void handle_message(struct fw_card *card, struct fw_request *request,
if (offset == dg00x->async_handler.offset)
handle_unknown_message(dg00x, offset, buf);
+ else if (offset == dg00x->async_handler.offset + 4)
+ handle_midi_control(dg00x, buf, length);
fw_send_response(card, request, RCODE_COMPLETE);
}
@@ -39,14 +75,25 @@ int snd_dg00x_transaction_reregister(struct snd_dg00x *dg00x)
{
struct fw_device *device = fw_parent_device(dg00x->unit);
__be32 data[2];
+ int err;
/* Unknown. 4bytes. */
data[0] = cpu_to_be32((device->card->node_id << 16) |
(dg00x->async_handler.offset >> 32));
data[1] = cpu_to_be32(dg00x->async_handler.offset);
+ err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
+ DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR,
+ &data, sizeof(data), 0);
+ if (err < 0)
+ return err;
+
+ /* Asynchronous transactions for MIDI control message. */
+ data[0] = cpu_to_be32((device->card->node_id << 16) |
+ (dg00x->async_handler.offset >> 32));
+ data[1] = cpu_to_be32(dg00x->async_handler.offset + 4);
return snd_fw_transaction(dg00x->unit, TCODE_WRITE_BLOCK_REQUEST,
- DG00X_ADDR_BASE + DG00X_OFFSET_MESSAGE_ADDR,
- &data, sizeof(data), 0);
+ DG00X_ADDR_BASE + DG00X_OFFSET_MIDI_CTL_ADDR,
+ &data, sizeof(data), 0);
}
int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
@@ -57,7 +104,7 @@ int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
};
int err;
- dg00x->async_handler.length = 4;
+ dg00x->async_handler.length = 12;
dg00x->async_handler.address_callback = handle_message;
dg00x->async_handler.callback_data = dg00x;
@@ -67,15 +114,24 @@ int snd_dg00x_transaction_register(struct snd_dg00x *dg00x)
return err;
err = snd_dg00x_transaction_reregister(dg00x);
- if (err < 0) {
- fw_core_remove_address_handler(&dg00x->async_handler);
- dg00x->async_handler.address_callback = NULL;
- }
+ if (err < 0)
+ goto error;
+
+ err = snd_fw_async_midi_port_init(&dg00x->out_control, dg00x->unit,
+ DG00X_ADDR_BASE + DG00X_OFFSET_MMC,
+ 4, packetize_message);
+ if (err < 0)
+ goto error;
return err;
+error:
+ fw_core_remove_address_handler(&dg00x->async_handler);
+ dg00x->async_handler.address_callback = NULL;
+ return err;
}
void snd_dg00x_transaction_unregister(struct snd_dg00x *dg00x)
{
+ snd_fw_async_midi_port_destroy(&dg00x->out_control);
fw_core_remove_address_handler(&dg00x->async_handler);
}
diff --git a/sound/firewire/digi00x/digi00x.h b/sound/firewire/digi00x/digi00x.h
index bd759bf..9b54b5b 100644
--- a/sound/firewire/digi00x/digi00x.h
+++ b/sound/firewire/digi00x/digi00x.h
@@ -54,6 +54,11 @@ struct snd_dg00x {
/* For asynchronous messages. */
struct fw_address_handler async_handler;
u32 msg;
+
+ /* For asynchronous MIDI controls. */
+ struct tasklet_struct tasklet;
+ struct snd_rawmidi_substream *in_control;
+ struct snd_fw_async_midi_port out_control;
};
#define DG00X_ADDR_BASE 0xffffe0000000ull
--
2.1.4
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