CS5530 datasheet(223/241 Pages) NSC

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Table 4-37. Signature/Length Block for 0x43

Byte Offset

Value

Signature: Always 0x00000070

Length: The length of the entire buffer including the signature block in bytes.

Reserved: Set to 0

Table4-38. I/O Blockfor 0x43

Byte Offset

Description

BYTE: Operation Type:

1 = Read

2= Write

3 = Read/And/Or/Write

4 = Define index and data ports

In addition, values may be OR’ed in to the upper two bits of this byte to indicate that special functions are desired:

0x80 = Do not perform this operation (convert to NO-OP).

0x40 = This is an index operation.

BYTE: Reserved set to 0

BYTE: I/O Length: Determines whether a BYTE, WORD or DWORD operation is performed.

1 = BYTE operation

2 = WORD operation

3 = DWORD operation

If BYTE 0 is a 4, then this field is used to indicate the size of the index write.

BYTE: Reserved set to 0

DWORD: I/O Address: This is the address in the I/O space to be used. It is always a WORD value. If this is a define

index/data port operation, this DWORD contains the I/O address of the index port.

If this is an index operation, other than define, this DWORD contains the value to be written to the index port.

DWORD: I/O Data: The meaning depends on the operation type:

Read = This is where the data read from the I/O port will be placed.

Write = This is the data to write to the I/O port.

Read/AND/OR/Write = This is the data that will be ANDed with the data read from the I/O port.

Define index/data port - This DWORD contains the I/O address of the data port.

DWORD: OR Data: This field is only used in a Read/AND/OR/Write operation. It contains the data that will be OR’ed

after the data read was AND’ed with the previous field. After the OR is done, the data will be re-written to the I/O port.

Note: In all cases if the data called for is shorter than the field, the data will be stored or retrieved from the least significant portion of

the DWORD.

Table 4-39. Audio Soft SMI Emulation

(0x60-0x63)

Soft SMI AX

SETUP_IDX

SETUP_DATA

0x6000

0x60

BP register value

0x6001

0x61

BP register value

0x6002

0x62

BX register value

0x6003

0x63

BX register value

Note: Arbitrary registers cannot be set in ASL code before

issuing a soft SMI. These commands provide an I/O

interface to allow AUDIO Soft SMIs to be emulated.

Table 4-40. Audio Power Control

(0x64)

Data

Value

Action

Power codec off and mute output

Power codec off, do not mute (allows CD to play)

Power codec on and un-mute output

Power codec on only

Note: This command allows control of power to the audio

codec as well as control of amplifier muting.

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