@@ -9,6 +9,18 @@
#include <sound/asound.h>
#include "digi00x.h"
+static int fill_midi_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_midi_control(struct snd_dg00x *dg00x, __be32 *buf,
unsigned int length)
{
@@ -102,15 +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, fill_midi_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);
}
@@ -56,6 +56,7 @@ struct snd_dg00x {
/* For asynchronous MIDI controls. */
struct snd_rawmidi_substream *in_control;
+ struct snd_fw_async_midi_port out_control;
};
#define DG00X_ADDR_BASE 0xffffe0000000ull
In previous commit, asynchronous transaction for incoming MIDI messages from physical controls is supported. The physical controls may be controlled by receiving MIDI messages at a certain address. This commit supports asynchronous transaction for this purpose. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/digi00x/digi00x-transaction.c | 29 ++++++++++++++++++++++++---- sound/firewire/digi00x/digi00x.h | 1 + 2 files changed, 26 insertions(+), 4 deletions(-)