Hardware/SATA controller

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Revision as of 23:48, 10 December 2019 by QuarkTheAwesome (talk | contribs) (Link to correct version of AHCI spec)
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SATA controller
Access
EspressoNone
StarbuckFull
Registers
Base0x0d160000
Length0x10000
Access size32 bits
Byte orderBig Endian
IRQs
Espresso???
Latte???
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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

0xFB - ATAPI_CF_FREC_READ_CMD

See Also

AHCI 1.2 spec