1 ============ 1 ============
2 Device table 2 Device table
3 ============ 3 ============
4 4
5 Matching of PCMCIA devices to drivers is done 5 Matching of PCMCIA devices to drivers is done using one or more of the
6 following criteria: 6 following criteria:
7 7
8 - manufactor ID 8 - manufactor ID
9 - card ID 9 - card ID
10 - product ID strings _and_ hashes of these str 10 - product ID strings _and_ hashes of these strings
11 - function ID 11 - function ID
12 - device function (actual and pseudo) 12 - device function (actual and pseudo)
13 13
14 You should use the helpers in include/pcmcia/d 14 You should use the helpers in include/pcmcia/device_id.h for generating the
15 struct pcmcia_device_id[] entries which match 15 struct pcmcia_device_id[] entries which match devices to drivers.
16 16
17 If you want to match product ID strings, you a 17 If you want to match product ID strings, you also need to pass the crc32
18 hashes of the string to the macro, e.g. if you 18 hashes of the string to the macro, e.g. if you want to match the product ID
19 string 1, you need to use 19 string 1, you need to use
20 20
21 PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_ 21 PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)),
22 22
23 If the hash is incorrect, the kernel will info 23 If the hash is incorrect, the kernel will inform you about this in "dmesg"
24 upon module initialization, and tell you of th 24 upon module initialization, and tell you of the correct hash.
25 25
26 You can determine the hash of the product ID s 26 You can determine the hash of the product ID strings by catting the file
27 "modalias" in the sysfs directory of the PCMCI 27 "modalias" in the sysfs directory of the PCMCIA device. It generates a string
28 in the following form: 28 in the following form:
29 pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFE 29 pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000
30 30
31 The hex value after "pa" is the hash of produc 31 The hex value after "pa" is the hash of product ID string 1, after "pb" for
32 string 2 and so on. 32 string 2 and so on.
33 33
34 Alternatively, you can use crc32hash (see tool 34 Alternatively, you can use crc32hash (see tools/pcmcia/crc32hash.c)
35 to determine the crc32 hash. Simply pass the 35 to determine the crc32 hash. Simply pass the string you want to evaluate
36 as argument to this program, e.g.: 36 as argument to this program, e.g.:
37 $ tools/pcmcia/crc32hash "Dual Speed" 37 $ tools/pcmcia/crc32hash "Dual Speed"
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