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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2021-06-16 11:28:47 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-06-17 12:37:24 +0300 |
| commit | b431f16f1685b38d4dda0434f4bae2265ab9e3da (patch) | |
| tree | 332d10812e089f7a9711bf86e5f8da2a183c26b3 /sound/firewire/motu/motu.h | |
| parent | d13d6b284d8b80802e3ab1c33f210579884c3060 (diff) | |
| download | linux-b431f16f1685b38d4dda0434f4bae2265ab9e3da.tar.xz | |
ALSA: firewire-motu: add support for MOTU 896
MOTU 896 is a second model in MOTU FireWire series, produced in 2001. This
model consists of three chips:
* Texas Instruments TSB41AB2 (Physical layer for IEEE 1394 bus)
* Philips Semiconductors PDI 1394L21BE (Link layer for IEEE 1394 bus and
packet processing layer)
* QuickLogic QuickRAM QL4016 (Data block processing layer and digital
signal processing)
This commit adds a support for the model, with its unique protocol as
version 1. The features of this protocol are:
* no MIDI support.
* Rx packets have no data chunks for control and status messages.
* Tx packets have 2 bytes for control and status messages in the end of
each data block.
* The most of settings are represented in bit flag in one quadlet address
(0x'ffff'f000'0b14).
* It's selectable to use signal on optical interface, however the device
has no register specific to it. The state has effect just to whether
to exclude differed data chunks.
* The internal multiplexer is not configured by software.
Just after powering on, the device has a quirk to fail handling
transaction. I recommend users to connect the device enough after powering
on.
$ python3 crpp < /sys/bus/firewire/devices/fw1/config_rom
ROM header and bus information block
-----------------------------------------------------------------
400 04102814 bus_info_length 4, crc_length 16, crc 10260
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 0000d645 device_id 000000d645 | EUI-64 0001f2000000d645
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 0003ab34 directory_length 3, crc 43828
42c 120001f2 specifier id
430 13000002 version
434 17102801 model
eui-64 leaf at 438
-----------------------------------------------------------------
438 0002057d leaf_length 2, crc 1405
43c 0001f200 company_id 0001f2 |
440 0000d645 device_id 000000d645 | EUI-64 0001f2000000d645
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210616082847.124688-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/motu/motu.h')
| -rw-r--r-- | sound/firewire/motu/motu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h index 13e2637a0330..a3deabdf9e34 100644 --- a/sound/firewire/motu/motu.h +++ b/sound/firewire/motu/motu.h @@ -123,6 +123,7 @@ struct snd_motu_spec { }; extern const struct snd_motu_spec snd_motu_spec_828; +extern const struct snd_motu_spec snd_motu_spec_896; extern const struct snd_motu_spec snd_motu_spec_828mk2; extern const struct snd_motu_spec snd_motu_spec_traveler; |