| Matching of PCMCIA devices to drivers is done using one or more of the |
| following criteria: |
| |
| - manufactor ID |
| - card ID |
| - product ID strings _and_ hashes of these strings |
| - function ID |
| - device function (actual and pseudo) |
| |
| You should use the helpers in include/pcmcia/device_id.h for generating the |
| struct pcmcia_device_id[] entries which match devices to drivers. |
| |
| If you want to match product ID strings, you also need to pass the crc32 |
| hashes of the string to the macro, e.g. if you want to match the product ID |
| string 1, you need to use |
| |
| PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)), |
| |
| If the hash is incorrect, the kernel will inform you about this in "dmesg" |
| upon module initialization, and tell you of the correct hash. |
| |
| You can determine the hash of the product ID strings by catting the file |
| "modalias" in the sysfs directory of the PCMCIA device. It generates a string |
| in the following form: |
| pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000 |
| |
| The hex value after "pa" is the hash of product ID string 1, after "pb" for |
| string 2 and so on. |
| |
| Alternatively, you can use crc32hash (see tools/pcmcia/crc32hash.c) |
| to determine the crc32 hash. Simply pass the string you want to evaluate |
| as argument to this program, e.g.: |
| $ tools/pcmcia/crc32hash "Dual Speed" |
