Commit 72f784f7 authored by Takashi Sakamoto's avatar Takashi Sakamoto Committed by Takashi Iwai

ALSA: fireworks: Improve comments about Fireworks transaction

It includes descriptions to cause misreading.
Signed-off-by: default avatarTakashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent cf44a136
...@@ -8,19 +8,19 @@ ...@@ -8,19 +8,19 @@
/* /*
* Fireworks have its own transaction. The transaction can be delivered by AV/C * Fireworks have its own transaction. The transaction can be delivered by AV/C
* Vendor Specific command. But at least Windows driver and firmware version 5.5 * Vendor Specific command frame or usual asynchronous transaction. At least,
* or later don't use it. * Windows driver and firmware version 5.5 or later don't use AV/C command.
* *
* Transaction substance: * Transaction substance:
* At first, 6 data exist. Following to the 6 data, parameters for each * At first, 6 data exist. Following to the data, parameters for each command
* commands exists. All of parameters are 32 bit alighed to big endian. * exist. All of the parameters are 32 bit alighed to big endian.
* data[0]: Length of transaction substance * data[0]: Length of transaction substance
* data[1]: Transaction version * data[1]: Transaction version
* data[2]: Sequence number. This is incremented by the device * data[2]: Sequence number. This is incremented by the device
* data[3]: transaction category * data[3]: Transaction category
* data[4]: transaction command * data[4]: Transaction command
* data[5]: return value in response. * data[5]: Return value in response.
* data[6-]: parameters * data[6-]: Parameters
* *
* Transaction address: * Transaction address:
* command: 0xecc000000000 * command: 0xecc000000000
......
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