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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2018-06-18 14:07:55 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-06-19 20:44:54 +0200 |
| commit | 6c5e1ac0e144a8560cfa11bed8cdadab9491952f (patch) | |
| tree | fc81fa115312cde25761858270c9cc4be96a01b4 /drivers/char/snsc_event.c | |
| parent | ALSA: firewire-motu: cancel chunk alignment for protocol version 2 (diff) | |
| download | linux-6c5e1ac0e144a8560cfa11bed8cdadab9491952f.tar.xz linux-6c5e1ac0e144a8560cfa11bed8cdadab9491952f.zip | |
ALSA: firewire-motu: add support for Motu Traveler
This commit adds support for MOTU Traveler, launched in 2005, discontinued
quite before. As a result, transmission of PCM frame and MIDI messages is
available via ALSA PCM and RawMIDI/Sequencer interfaces.
This model supports sampling transmission frequency up to 192.0 kHz, and
AES/EBU on XLR interface and ADAT on optical interface. Unlike
Motu 828MkII, Windows driver can switch fetching mode for DSP, like
mute/unmute feature.
Although this commit enables high sampling transmission frequency, actual
sound from this model is not good. As long as I tested, it's silence at
176.4 kHz, and it includes hissing noise at 192.0 kHz. In my opinion, as I
reported at 3526ce7f9ba7 ('ALSA: firewire-motu: add MOTU specific protocol
layer'), timestamping on source packet header (SPH) may not still be good
for this model as well.
$ python2 crpp < /sys/bus/firewire/devices/fw1/config_rom
ROM header and bus information block
-----------------------------------------------------------------
400 04106505 bus_info_length 4, crc_length 16, crc 25861
404 31333934 bus_name "1394"
408 20001000 irmc 0, cmc 0, isc 1, bmc 0, cyc_clk_acc 0, max_rec 1 (4)
40c 0001f200 company_id 0001f2 |
410 0001f32f device_id 000001f32f | EUI-64 0001f2000001f32f
root directory
-----------------------------------------------------------------
414 0004c65c directory_length 4, crc 50780
418 030001f2 vendor
41c 0c0083c0 node capabilities per IEEE 1394
420 8d000006 --> eui-64 leaf at 438
424 d1000001 --> unit directory at 428
unit directory at 428
-----------------------------------------------------------------
428 00035955 directory_length 3, crc 22869
42c 120001f2 specifier id
430 13000009 version
434 17107800 model
eui-64 leaf at 438
-----------------------------------------------------------------
438 000206b2 leaf_length 2, crc 1714
43c 0001f200 company_id 0001f2 |
440 0001f32f device_id 000001f32f | EUI-64 0001f2000001f32f
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/char/snsc_event.c')
0 files changed, 0 insertions, 0 deletions