irda device

[tom r. <to...@to...>]

my laptop is a asus l2400b.
i assume the irda device to be a national semiconductor chip on a 
intel  82801CAM LPC (rev. 02). This information i collected from 
windows device manager and lspci.
now unfortunatedly the nsc-ircc module can not be loaded

nsc-ircc.o: unresolved symbol irda_qos_bits_to_value_R448b8aaa
nsc-ircc.o: unresolved symbol irlap_open_R60ca81f3
nsc-ircc.o: unresolved symbol async_unwrap_char_R987ec0fe
nsc-ircc.o: unresolved symbol irda_device_txqueue_empty_R49338ac4
nsc-ircc.o: unresolved symbol irlap_close_R172470bd
nsc-ircc.o: unresolved symbol setup_dma_R01485953
nsc-ircc.o: unresolved symbol async_wrap_skb_Rb042f43b
nsc-ircc.o: unresolved symbol irda_device_set_media_busy_Rabd1f1ff
nsc-ircc.o: unresolved symbol irda_init_max_qos_capabilies_R6b043eba
nsc-ircc.o: unresolved symbol irda_device_setup_Rb30c36fd

i tried all other modules and got the same result.
i found no documentation on the chip.
where to go from here ?

tom