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The host can only ever reply with fn=0 (OK) or fn =1 (ERROR).
If the reply has fn=1, Data holds a non-zero error code.
If fn=0, the value of Data means:
|
Replying to DSP call
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Data contains
|
|
0
|
OK
|
0
|
|
1
|
Error
|
0
|
|
2
|
OpenHandler
|
0
|
|
3
|
CloseHandler
|
0
|
|
4
|
SramToHost
|
number of bytes taken from SRAM
|
|
5
|
HostToSram
|
maximum number of bytes put in SRAM
|
|
6
|
OpenPci
|
maximum transfer size in bytes
|
|
7
|
ClosePci
|
release any locked memory
|
|
8
|
PciToHost
|
number of bytes taken from PCI buffer
|
|
9
|
HostToPci
|
maximum number of bytes put in PCI buffer
|
|
10–15
|
|
handler-specific
|
|