devicetable.rst (1341B)
1============ 2Device table 3============ 4 5Matching of PCMCIA devices to drivers is done using one or more of the 6following criteria: 7 8- manufactor ID 9- card ID 10- product ID strings _and_ hashes of these strings 11- function ID 12- device function (actual and pseudo) 13 14You should use the helpers in include/pcmcia/device_id.h for generating the 15struct pcmcia_device_id[] entries which match devices to drivers. 16 17If you want to match product ID strings, you also need to pass the crc32 18hashes of the string to the macro, e.g. if you want to match the product ID 19string 1, you need to use 20 21PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)), 22 23If the hash is incorrect, the kernel will inform you about this in "dmesg" 24upon module initialization, and tell you of the correct hash. 25 26You can determine the hash of the product ID strings by catting the file 27"modalias" in the sysfs directory of the PCMCIA device. It generates a string 28in the following form: 29pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000 30 31The hex value after "pa" is the hash of product ID string 1, after "pb" for 32string 2 and so on. 33 34Alternatively, you can use crc32hash (see tools/pcmcia/crc32hash.c) 35to determine the crc32 hash. Simply pass the string you want to evaluate 36as argument to this program, e.g.: 37$ tools/pcmcia/crc32hash "Dual Speed"