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ALSA: fireface: localize a handler for MIDI messages on tx transaction 

Content of asynchronous transaction for MIDI messages differs between
Fireface 400 and 800.

This commit adds a model-specific handler for the transaction and adds
arrangement.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-12-11 19:17:34 +09:00 committed by Takashi Iwai
parent 3eb8a24459
commit aef4ad2f5a
3 changed files with 40 additions and 33 deletions
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38
sound/firewire/fireface/ff-protocol-ff400.c
View File

@ -105,7 +105,45 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
return err;
}
static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)
{
int i;
for (i = 0; i < length / 4; i++) {
u32 quad = le32_to_cpu(buf[i]);
u8 byte;
unsigned int index;
struct snd_rawmidi_substream *substream;
/* Message in first port. */
/*
* This value may represent the index of this unit when the same
* units are on the same IEEE 1394 bus. This driver doesn't use
* it.
*/
index = (quad >> 8) & 0xff;
if (index > 0) {
substream = READ_ONCE(ff->tx_midi_substreams[0]);
if (substream != NULL) {
byte = quad & 0xff;
snd_rawmidi_receive(substream, &byte, 1);
}
}
/* Message in second port. */
index = (quad >> 24) & 0xff;
if (index > 0) {
substream = READ_ONCE(ff->tx_midi_substreams[1]);
if (substream != NULL) {
byte = (quad >> 16) & 0xff;
snd_rawmidi_receive(substream, &byte, 1);
}
}
}
}
const struct snd_ff_protocol snd_ff_protocol_ff400 = {
.handle_midi_msg = ff400_handle_midi_msg,
.begin_session = ff400_begin_session,
.finish_session = ff400_finish_session,
.switch_fetching_mode = ff400_switch_fetching_mode,

34
sound/firewire/fireface/ff-transaction.c
View File

@ -206,42 +206,10 @@ static void handle_midi_msg(struct fw_card *card, struct fw_request *request,
{
struct snd_ff *ff = callback_data;
__le32 *buf = data;
u32 quad;
u8 byte;
unsigned int index;
struct snd_rawmidi_substream *substream;
int i;
fw_send_response(card, request, RCODE_COMPLETE);
for (i = 0; i < length / 4; i++) {
quad = le32_to_cpu(buf[i]);
/* Message in first port. */
/*
* This value may represent the index of this unit when the same
* units are on the same IEEE 1394 bus. This driver doesn't use
* it.
*/
index = (quad >> 8) & 0xff;
if (index > 0) {
substream = READ_ONCE(ff->tx_midi_substreams[0]);
if (substream != NULL) {
byte = quad & 0xff;
snd_rawmidi_receive(substream, &byte, 1);
}
}
/* Message in second port. */
index = (quad >> 24) & 0xff;
if (index > 0) {
substream = READ_ONCE(ff->tx_midi_substreams[1]);
if (substream != NULL) {
byte = (quad >> 16) & 0xff;
snd_rawmidi_receive(substream, &byte, 1);
}
}
}
ff->spec->protocol->handle_midi_msg(ff, buf, length);
}
static int allocate_own_address(struct snd_ff *ff, int i)

1
sound/firewire/fireface/ff.h
View File

@ -108,6 +108,7 @@ enum snd_ff_clock_src {
};
struct snd_ff_protocol {
void (*handle_midi_msg)(struct snd_ff *ff, __le32 *buf, size_t length);
int (*begin_session)(struct snd_ff *ff, unsigned int rate);
void (*finish_session)(struct snd_ff *ff);
int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);