Re: PCMCIA to PCI adaptor -- Support Forum for CompuLab's X86CORE & X86BASE Products

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Subject: Re: PCMCIA to PCI adaptor

Author:
Dimitry Katkov

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Date Posted: 01:53:45 10/22/02 Tue
In reply to: Jenson 's message, "PCMCIA to PCI adaptor" on 00:53:31 10/16/02 Wed

Hello.

There is no common standard for assigning interrupts to PCI-to-cardbus or PCI-to-PCMCIA bridges, so it must be hardcoded in BIOS as it is done for 786BASE CardBus controller. If the second PCI-to-CardBus bridge required, it's interrupts (and maybe some other registers) must be initialized by the operating system before the driver is loaded.
To get this working in Linux you can use "pcitweak" utility to access the interrupt configuration register on your PCI-PCMCIA adapter. The interrupt configuration register resides at offset 0x3C. For example: to assign IRQ10 to the device interrupt you have to write 0x0A to register 0x3C in the selected PCI device.
Run "pcitweak -h" to get the information about using pcitweak utility.
Run "pcitweak -l" to find the device/bus/function number of your PCI-PCMCIA controller.

You must do all the pcitweaks BEFORE the socket driver is loaded. In case you are using yenta_socket.o you have to build the kernel without it and then insmod this driver after pcitweaks.

Best regards.

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Replies:

Subject	Author	Date
PCI to PCMCIA adaptor	Andrew Perryman	06:30:03 01/29/03 Wed

Re: PCI to PCMCIA adaptor	Rich	20:57:19 05/13/03 Tue