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ALSA: fireworks: Improve comments about Fireworks transaction

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It includes descriptions to cause misreading.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2014-06-04 15:25:34 +09:00 committed by Takashi Iwai
parent cf44a136c0
commit 72f784f7d0
1 changed files with 8 additions and 8 deletions
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16
sound/firewire/fireworks/fireworks_transaction.c
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@ -8,19 +8,19 @@
/*
* 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
* or later don't use it.
* Vendor Specific command frame or usual asynchronous transaction. At least,
* Windows driver and firmware version 5.5 or later don't use AV/C command.
*
* Transaction substance:
* At first, 6 data exist. Following to the 6 data, parameters for each
* commands exists. All of parameters are 32 bit alighed to big endian.
* At first, 6 data exist. Following to the data, parameters for each command
* exist. All of the parameters are 32 bit alighed to big endian.
* data[0]: Length of transaction substance
* data[1]: Transaction version
* data[2]: Sequence number. This is incremented by the device
* data[3]: transaction category
* data[4]: transaction command
* data[5]: return value in response.
* data[6-]: parameters
* data[3]: Transaction category
* data[4]: Transaction command
* data[5]: Return value in response.
* data[6-]: Parameters
*
* Transaction address:
* command: 0xecc000000000