]>
Commit | Line | Data |
---|---|---|
5085cb26 DB |
1 | Matching of PCMCIA devices to drivers is done using one or more of the |
2 | following criteria: | |
3 | ||
4 | - manufactor ID | |
5 | - card ID | |
6 | - product ID strings _and_ hashes of these strings | |
7 | - function ID | |
8 | - device function (actual and pseudo) | |
9 | ||
10 | You should use the helpers in include/pcmcia/device_id.h for generating the | |
11 | struct pcmcia_device_id[] entries which match devices to drivers. | |
12 | ||
13 | If you want to match product ID strings, you also need to pass the crc32 | |
14 | hashes of the string to the macro, e.g. if you want to match the product ID | |
15 | string 1, you need to use | |
16 | ||
17 | PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)), | |
18 | ||
19 | If the hash is incorrect, the kernel will inform you about this in "dmesg" | |
20 | upon module initialization, and tell you of the correct hash. | |
21 | ||
eb05bfe4 DB |
22 | You can determine the hash of the product ID strings by catting the file |
23 | "modalias" in the sysfs directory of the PCMCIA device. It generates a string | |
5085cb26 DB |
24 | in the following form: |
25 | pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000 | |
26 | ||
27 | The hex value after "pa" is the hash of product ID string 1, after "pb" for | |
28 | string 2 and so on. | |
29 | ||
d29693bf RD |
30 | Alternatively, you can use crc32hash (see Documentation/pcmcia/crc32hash.c) |
31 | to determine the crc32 hash. Simply pass the string you want to evaluate | |
32 | as argument to this program, e.g.: | |
5085cb26 | 33 | $ ./crc32hash "Dual Speed" |