Prism2.5 high(12-14) channels

Hi,

I have ThinkPad with built-in Prism2.5 Mini-PCI.

wi0: <Intersil Prism2.5> mem 0xf0000000-0xf0000fff irq 11 at device 5.0 on pci2
wi0: using RF:PRISM2.5 MAC:ISL3874A(Mini-PCI)
wi0: Intersil Firmware: Primary 1.01.00, Station 1.04.02

As you know, 1-14 channels are available in Japan.
But by default, 12-14 channels can't be used.

% wicontrol
...
Channel list:                           [ 2047 ]	(0x03ff)
...


According to datasheets,
(available from http://www.intersil.com/data/fn/fn8017.pdf)
ISL3874 has 'Control Registers',
and set '1' to Bit 4 of the 'CONFIGURATION REGISTER 5',
12-14 channels seem to be used.

But, I can't find how to access this register.

If you know how to access these 'Control Registers',
please let me know.


Regards,

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