Fireworks has a quirk to ignore MIDI messages in data blocks more than 8. This commit adds a flag for this quirk and codes to skip 8 or more data blocks to transfer MIDI messages.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/amdtp.c | 5 ++++- sound/firewire/amdtp.h | 3 +++ sound/firewire/fireworks/fireworks_stream.c | 5 +++++ 3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c index 5e13b3f..28ee3d8 100644 --- a/sound/firewire/amdtp.c +++ b/sound/firewire/amdtp.c @@ -78,6 +78,8 @@ int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, s->callbacked = false; s->sync_slave = NULL;
+ s->rx_blocks_for_midi = UINT_MAX; + return 0; } EXPORT_SYMBOL(amdtp_stream_init); @@ -472,7 +474,8 @@ static void amdtp_fill_midi(struct amdtp_stream *s, b = (u8 *)&buffer[s->midi_position];
port = (s->data_block_counter + f) % 8; - if ((s->midi[port] == NULL) || + if ((f >= s->rx_blocks_for_midi) || + (s->midi[port] == NULL) || (snd_rawmidi_transmit(s->midi[port], b + 1, 1) <= 0)) b[0] = 0x80; else diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h index 42c75c9..fb5934c 100644 --- a/sound/firewire/amdtp.h +++ b/sound/firewire/amdtp.h @@ -125,6 +125,9 @@ struct amdtp_stream { /* quirk: fixed interval of dbc between previos/current packets. */ unsigned int tx_dbc_interval;
+ /* quirk: the first count of data blocks in an rx packet for MIDI */ + unsigned int rx_blocks_for_midi; + bool callbacked; wait_queue_head_t callback_wait; struct amdtp_stream *sync_slave; diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c index 3a3f203..f9d836f 100644 --- a/sound/firewire/fireworks/fireworks_stream.c +++ b/sound/firewire/fireworks/fireworks_stream.c @@ -212,6 +212,11 @@ int snd_efw_stream_init_duplex(struct snd_efw *efw) destroy_stream(efw, &efw->tx_stream); goto end; } + /* + * Fireworks ignores MIDI messages in more than first 8 data + * blocks of an received AMDTP packet. + */ + efw->rx_stream.rx_blocks_for_midi = 8;
/* set IEC61883 compliant mode (actually not fully compliant...) */ err = snd_efw_command_set_tx_mode(efw, SND_EFW_TRANSPORT_MODE_IEC61883);