1*4882a593Smuzhiyun============ 2*4882a593SmuzhiyunDevice table 3*4882a593Smuzhiyun============ 4*4882a593Smuzhiyun 5*4882a593SmuzhiyunMatching of PCMCIA devices to drivers is done using one or more of the 6*4882a593Smuzhiyunfollowing criteria: 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun- manufactor ID 9*4882a593Smuzhiyun- card ID 10*4882a593Smuzhiyun- product ID strings _and_ hashes of these strings 11*4882a593Smuzhiyun- function ID 12*4882a593Smuzhiyun- device function (actual and pseudo) 13*4882a593Smuzhiyun 14*4882a593SmuzhiyunYou should use the helpers in include/pcmcia/device_id.h for generating the 15*4882a593Smuzhiyunstruct pcmcia_device_id[] entries which match devices to drivers. 16*4882a593Smuzhiyun 17*4882a593SmuzhiyunIf you want to match product ID strings, you also need to pass the crc32 18*4882a593Smuzhiyunhashes of the string to the macro, e.g. if you want to match the product ID 19*4882a593Smuzhiyunstring 1, you need to use 20*4882a593Smuzhiyun 21*4882a593SmuzhiyunPCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)), 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunIf the hash is incorrect, the kernel will inform you about this in "dmesg" 24*4882a593Smuzhiyunupon module initialization, and tell you of the correct hash. 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunYou can determine the hash of the product ID strings by catting the file 27*4882a593Smuzhiyun"modalias" in the sysfs directory of the PCMCIA device. It generates a string 28*4882a593Smuzhiyunin the following form: 29*4882a593Smuzhiyunpcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000 30*4882a593Smuzhiyun 31*4882a593SmuzhiyunThe hex value after "pa" is the hash of product ID string 1, after "pb" for 32*4882a593Smuzhiyunstring 2 and so on. 33*4882a593Smuzhiyun 34*4882a593SmuzhiyunAlternatively, you can use crc32hash (see tools/pcmcia/crc32hash.c) 35*4882a593Smuzhiyunto determine the crc32 hash. Simply pass the string you want to evaluate 36*4882a593Smuzhiyunas argument to this program, e.g.: 37*4882a593Smuzhiyun$ tools/pcmcia/crc32hash "Dual Speed" 38