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ALSA: fireface: add protocol-specific operation to fill transaction buffer with MIDI messages 

Between former and latter models, content of asynchronous transaction
for MIDI messages from driver to device is different.

This commit is a preparation to support latter models. A protocol-specific
operation is added to encode MIDI messages to the transaction.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-01-22 22:17:04 +09:00 committed by Takashi Iwai
parent 481e09ac9a
commit 82b6297b44
3 changed files with 38 additions and 19 deletions
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23
sound/firewire/fireface/ff-protocol-former.c
View File

@ -263,6 +263,27 @@ static void former_dump_status(struct snd_ff *ff,
dump_sync_status(ff, buffer);
}
static int former_fill_midi_msg(struct snd_ff *ff,
struct snd_rawmidi_substream *substream,
unsigned int port)
{
u8 *buf = (u8 *)ff->msg_buf[port];
int len;
int i;
len = snd_rawmidi_transmit_peek(substream, buf,
SND_FF_MAXIMIM_MIDI_QUADS);
if (len <= 0)
return len;
// One quadlet includes one byte.
for (i = len - 1; i >= 0; --i)
ff->msg_buf[port][i] = cpu_to_le32(buf[i]);
ff->rx_bytes[port] = len;
return len;
}
#define FF800_STF 0x0000fc88f000
#define FF800_RX_PACKET_FORMAT 0x0000fc88f004
#define FF800_ALLOC_TX_STREAM 0x0000fc88f008
@ -392,6 +413,7 @@ static void ff800_handle_midi_msg(struct snd_ff *ff, unsigned int offset,
const struct snd_ff_protocol snd_ff_protocol_ff800 = {
.handle_midi_msg = ff800_handle_midi_msg,
.fill_midi_msg = former_fill_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
.begin_session = ff800_begin_session,
@ -543,6 +565,7 @@ static void ff400_handle_midi_msg(struct snd_ff *ff, unsigned int offset,
const struct snd_ff_protocol snd_ff_protocol_ff400 = {
.handle_midi_msg = ff400_handle_midi_msg,
.fill_midi_msg = former_fill_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
.begin_session = ff400_begin_session,

31
sound/firewire/fireface/ff-transaction.c
View File

@ -51,23 +51,17 @@ static void finish_transmit_midi1_msg(struct fw_card *card, int rcode,
finish_transmit_midi_msg(ff, 1, rcode);
}
static inline void fill_midi_buf(struct snd_ff *ff, unsigned int port,
unsigned int index, u8 byte)
{
ff->msg_buf[port][index] = cpu_to_le32(byte);
}
static void transmit_midi_msg(struct snd_ff *ff, unsigned int port)
{
struct snd_rawmidi_substream *substream =
READ_ONCE(ff->rx_midi_substreams[port]);
u8 *buf = (u8 *)ff->msg_buf[port];
int i, len;
int quad_count;
struct fw_device *fw_dev = fw_parent_device(ff->unit);
unsigned long long addr;
int generation;
fw_transaction_callback_t callback;
int tcode;
if (substream == NULL || snd_rawmidi_transmit_empty(substream))
return;
@ -81,14 +75,10 @@ static void transmit_midi_msg(struct snd_ff *ff, unsigned int port)
return;
}
len = snd_rawmidi_transmit_peek(substream, buf,
SND_FF_MAXIMIM_MIDI_QUADS);
if (len <= 0)
quad_count = ff->spec->protocol->fill_midi_msg(ff, substream, port);
if (quad_count <= 0)
return;
for (i = len - 1; i >= 0; i--)
fill_midi_buf(ff, port, i, buf[i]);
if (port == 0) {
addr = ff->spec->midi_rx_addrs[0];
callback = finish_transmit_midi0_msg;
@ -99,8 +89,12 @@ static void transmit_midi_msg(struct snd_ff *ff, unsigned int port)
/* Set interval to next transaction. */
ff->next_ktime[port] = ktime_add_ns(ktime_get(),
len * 8 * NSEC_PER_SEC / 31250);
ff->rx_bytes[port] = len;
ff->rx_bytes[port] * 8 * NSEC_PER_SEC / 31250);
if (quad_count == 1)
tcode = TCODE_WRITE_QUADLET_REQUEST;
else
tcode = TCODE_WRITE_BLOCK_REQUEST;
/*
* In Linux FireWire core, when generation is updated with memory
@ -112,10 +106,9 @@ static void transmit_midi_msg(struct snd_ff *ff, unsigned int port)
*/
generation = fw_dev->generation;
smp_rmb();
fw_send_request(fw_dev->card, &ff->transactions[port],
TCODE_WRITE_BLOCK_REQUEST,
fw_send_request(fw_dev->card, &ff->transactions[port], tcode,
fw_dev->node_id, generation, fw_dev->max_speed,
addr, &ff->msg_buf[port], len * 4,
addr, &ff->msg_buf[port], quad_count * 4,
callback, &ff->transactions[port]);
}

3
sound/firewire/fireface/ff.h
View File

@ -107,6 +107,9 @@ enum snd_ff_clock_src {
struct snd_ff_protocol {
void (*handle_midi_msg)(struct snd_ff *ff, unsigned int offset,
__le32 *buf, size_t length);
int (*fill_midi_msg)(struct snd_ff *ff,
struct snd_rawmidi_substream *substream,
unsigned int port);
int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src);
int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);