Switch JMicron JMB363 Controller to Multi-Function Mode

[D.Simon]

Hi!

I have a Delock JMB363 PCIe Card which has NO option to Switch to
Multi-Function Mode (two PCI Devices, one pure SATA, the other one
IDE). Instead, the Card shows up as a single RAID Controller, so no
AHCI is possible. Integrated JMB Chips on Motherboards can be switched
to pure AHCI via Mainboard BIOS' Setup, with PCIe Cards, you can't :(

When i booted into Linux, i found that Linux managed to turn on AHCI
for that Card and the Controller showed up as two Devices! AHCI and
IDE. I peeked around in the Driver Sources and found that
"pci_write_config_byte(pdev, 0x41, 0xa1);" turns on this mode.

The darwinata project Mac Driver has this pci write Function:

void CLASS::pciConfigWrite8( UInt8 offset, UInt8 data, UInt8 mask )
{
fProvider->pciConfigWrite8( offset, data, mask );
}

I tried to integrate that in the Mac Driver, but i did not get it to
work. "Offset" should be 0x41, "data" should be 0xa1. But what should
"mask" be?
How and where should i call that function in the Mac Driver?


Thanks, Dom

[Fede]

This is the definition of pciConfigWrite8 from JMicronATAPCIRoot:

void CLASS::pciConfigWrite8( UInt8 offset, UInt8 data, UInt8 mask )
{

UInt8 u8;

IOLockLock( fPCILock );

u8 = fProvider->configRead8( offset );
u8 &= ~mask;
u8 |= (mask & data);
fProvider->configWrite8( offset, u8 );

IOLockUnlock( fPCILock );
}


This is used to write bits. So the mask is used to tell wich bits we
are replacing.

If you set the mask in 0xFF, then every bit is written.