38 lines
1.3 KiB
ReStructuredText
38 lines
1.3 KiB
ReStructuredText
============
|
|
Device table
|
|
============
|
|
|
|
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"
|