Manu services

Manu ("Manufacturing") services are provided by the 010000000000B14A sysmodule, which is installed at the factory but not on normal retail systems.

manu

This is "nn::manu::IManu".

Cmd	Name
0	InitializeUsbTransferPipeFile
1	IsFileExist
2	ReadFile
3	WriteFile
4	InitializeUsbTransferPipeRaw
5	ReadRaw
6	WriteRaw
7	[7.0.0+]
8	[14.0.0+]

All commands are wrappers for usb:ds requests with USB configured as:

VID:           0x057E (Nintendo Co., Ltd)
PID:           0x3000
bcdDevice:     0x0100 (1.00)
Manufacturer:  "Nintendo"
Product:       "NintendoSdkDebugger"
SerialNumber:  "SerialNumber"

[7.0.0+] USB is now configured as:

VID:           0x057E (Nintendo Co., Ltd)
PID:           0x3003
bcdDevice:     0x0100 (1.00)
Manufacturer:  "Nintendo"
Product:       "NintendoSdkManufacturing"
SerialNumber:  "SerialNumber"

InitializeUsbTransferPipeFile

Unofficial name.

Takes an input u32. No output.

Configures a transfer pipe over usb:ds for file access mode.

IsFileExist

Unofficial name.

Takes a type-0x9 input buffer containing a path string. Returns an output u64.

Checks whether the specified file exists.

This is "FsFile::Exists" in SystemInitializer.

ReadFile

Unofficial name.

Takes a type-0x6 output buffer, a type-0x9 input buffer containing a path string and three u64s OutSize, Offset and InSize. No output.

Reads data from the specified file.

WriteFile

Unofficial name.

Takes a type-0x5 output input, a type-0x9 input buffer containing a path string and three u64s OutSize, Offset and InSize. No output.

Writes data to the specified file.

SystemInitializer also uses this as "FsFile::Create" with all input u64s set to 0.

InitializeUsbTransferPipeRaw

Unofficial name.

Takes an input u32. No output.

Configures a transfer pipe over usb:ds for raw access mode.

ReadRaw

Unofficial name.

Takes a type-0x6 output buffer and two u64s Offset and Size. No output.

Reads raw data from the device.

WriteRaw

Unofficial name.

Takes a type-0x5 input buffer and two u64s Offset and Size. No output.

Writes raw data to the device.

Cmd7

Takes a type-0x9 input buffer containing a path string. No output.

Cmd8

Takes a type-0x9 input buffer containing a path string. No output.

Protocol

CommandId

Value	Name
1	IsFileExist
2	ReadFile
3	WriteFile
4	#Cmd7
5	#Cmd8

ServerCommandId

Value	Name
1	LaunchProgram
2	Shutdown
3	Reboot
5

Unofficial names.

Unrecognized commands are handled by just returning 0.

Shutdown/Reboot were added at some point after LaunchProgram, these are present in [9.1.0] (exact version which added these is unknown). These call the SystemApplet Main() func (also used by qlaunch) with a funcptr to call the relevant am IGlobalStateController StartShutdownSequence/StartRebootSequence cmd.

Cmd5 was added at some point after Shutdown/Reboot, this is present in [14.0.0] (exact version which added this is unknown). The command payload data contains a s32 path_size, followed by a NUL-terminated string with that size. After loading the input string, a handler func is called with this string.

Command

Offset	Size	Description
0x0	0x8	Magicnum (0xDEADCAFEDEADCAFE)
0x8	0x4	CommandId when sent to the remote device, ServerCommandId for received commands.
0xC	0x4	Padding
0x10	0x8	Payload size

The payload data with the above size follows.

After WriteFile sends the file-data, it reads an additional Response.

Response

Offset	Size	Description
0x0	0x8	Ignored by manu.
0x8	0x4	Status, non-zero indicates error.
0xC	0x4	Padding
0x10	0x8	Output value if any. May be returned by the service commands.

ReadFile additionally returns the requested file-data, followed by another Response.

CommandServerStatus

Offset	Size	Description
0x0	0x4	Status, non-zero indicates error.

CommandServerResponse

Offset	Size	Description
0x0	0x4	Status, non-zero indicates error.
0x4	0x4	Padding
0x8	0x4	Result from handling the ServerCommandId.

Notes

There's a total of 3 threads: 2 for the IPC handler threads (which send commands to the remote device and gets the response). And there's the separate nn::manu::CommandServer::RunThread, which receives commands from the remote device and sends replies. This latter thread runs regardless of any service commands being used.