SPI spi_spcom[STR] freeze

[GSM909 at gmx.de]

Hello

I have problem with SPI

When I want to start my SPI transfer by setting 0x80 to my spi_spcom register. 0x80 keeping in this register till I "READ" the SPMODE register. There is also no transfer or any clock on the pins. 
Did anyone had an Idea what this can be ???

my system:
mpc8270 
pm827 from mircosys
linux 2.6.14 with Xenomai 2.1.2
The kernel module with the spi run under the rtdm.

Thx for helping me.
Regards 
Fred

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