Difference between revisions of "Hardware/SATA controller"

	SATA controller
Access
Espresso	None
Starbuck	Full
Registers
Base	0x0d160000
Length	0x10000
Access size	32 bits
Byte order	Big Endian
IRQs
Espresso	???
Latte	???
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Revision as of 16:15, 17 October 2017

The Wii U has a standard AHCI 1.2 SATA controller onboard. It identifies as having two ports (0 and 1) running at 3Gbps. In retail systems, the disc drive is connected to port 0; while port 1 is disconnected. Unused code in IOS-BSP indicates that port 7 may be present on non-retail units.

In terms of hardware registers; the controller lines up with the specification starting at address 0x0D160400; that is; the first Generic Host Control register (Host Capabilities) resides at 0x0D160400. On a retail console, this register reads out 0x7720FF81.

Registers

The generic host control registers start at 0x0D160400.
The port registers start at 0x0D160500.

ATAPI commands

Besides commands defined in the ATAPI specification, the Wii U also seems to have some custom commands.

0xDA - ATAPI_DI_READ_DISC_INFORMATION_CMD

0xE0 - ATAPI_DI_REQUEST_ERROR_ID_CMD

0xED - ATAPI_DI_READ_CBC_CMD

0xF0 - ATAPI_CF_REQUEST_DRIVE_ID_CMD

0xF1 - ATAPI_CF_AUTHENTICATE_CMD

0xF2 - ATAPI_CF_START_STOP_UNIT_CMD

0xF3 - ATAPI_CF_READ_CMD

0xF4 - ATAPI_CF_TEST_UNIT_READY_CMD

0xF5 - ATAPI_CF_INQUIRY_CMD

Offset	Size	Description
0x00	0x02	Unknown
0x02	0x01	Vendor
0x03	0x01	Device
0x04	0x1C	Unknown
0x20	-	End

@@ Line 18: / Line 18: @@
 == ATAPI commands ==
 Besides commands defined in the ATAPI specification, the Wii U also seems to have some custom commands.
+=== 0xDA - ATAPI_DI_READ_DISC_INFORMATION_CMD ===
+=== 0xE0 - ATAPI_DI_REQUEST_ERROR_ID_CMD ===
+=== 0xED - ATAPI_DI_READ_CBC_CMD ===
 === 0xF0 - ATAPI_CF_REQUEST_DRIVE_ID_CMD ===