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-rw-r--r--Documentation/pcmcia/devicetable.txt64
-rw-r--r--Documentation/pcmcia/driver-changes.txt51
2 files changed, 115 insertions, 0 deletions
diff --git a/Documentation/pcmcia/devicetable.txt b/Documentation/pcmcia/devicetable.txt
new file mode 100644
index 000000000000..7225f9eddf9d
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1Matching of PCMCIA devices to drivers is done using one or more of the
2following 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
10You should use the helpers in include/pcmcia/device_id.h for generating the
11struct pcmcia_device_id[] entries which match devices to drivers.
12
13If you want to match product ID strings, you also need to pass the crc32
14hashes of the string to the macro, e.g. if you want to match the product ID
15string 1, you need to use
16
17PCMCIA_DEVICE_PROD_ID1("some_string", 0x(hash_of_some_string)),
18
19If the hash is incorrect, the kernel will inform you about this in "dmesg"
20upon module initialization, and tell you of the correct hash.
21
22You can determine the hash of the product ID strings by running
23"pcmcia-modalias %n.%m" [%n being replaced with the socket number and %m being
24replaced with the device function] from pcmciautils. It generates a string
25in the following form:
26pcmcia:m0149cC1ABf06pfn00fn00pa725B842DpbF1EFEE84pc0877B627pd00000000
27
28The hex value after "pa" is the hash of product ID string 1, after "pb" for
29string 2 and so on.
30
31Alternatively, you can use this small tool to determine the crc32 hash.
32simply pass the string you want to evaluate as argument to this program,
33e.g.
34$ ./crc32hash "Dual Speed"
35
36-------------------------------------------------------------------------
37/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
38#include <string.h>
39#include <stdio.h>
40#include <ctype.h>
41#include <stdlib.h>
42
43unsigned int crc32(unsigned char const *p, unsigned int len)
44{
45 int i;
46 unsigned int crc = 0;
47 while (len--)
48 crc ^= *p++;
49 for (i = 0; i < 8; i++)
50 crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
51 }
52 return crc;
53}
54
55int main(int argc, char **argv) {
56 unsigned int result;
57 if (argc != 2) {
58 printf("no string passed as argument\n");
59 return -1;
60 }
61 result = crc32(argv[1], strlen(argv[1]));
62 printf("0x%x\n", result);
63 return 0;
64}
diff --git a/Documentation/pcmcia/driver-changes.txt b/Documentation/pcmcia/driver-changes.txt
new file mode 100644
index 000000000000..9c315ab48a02
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1This file details changes in 2.6 which affect PCMCIA card driver authors:
2
3* in-kernel device<->driver matching
4 PCMCIA devices and their correct drivers can now be matched in
5 kernelspace. See 'devicetable.txt' for details.
6
7* Device model integration (as of 2.6.11)
8 A struct pcmcia_device is registered with the device model core,
9 and can be used (e.g. for SET_NETDEV_DEV) by using
10 handle_to_dev(client_handle_t * handle).
11
12* Convert internal I/O port addresses to unsigned long (as of 2.6.11)
13 ioaddr_t should be replaced by kio_addr_t in PCMCIA card drivers.
14
15* irq_mask and irq_list parameters (as of 2.6.11)
16 The irq_mask and irq_list parameters should no longer be used in
17 PCMCIA card drivers. Instead, it is the job of the PCMCIA core to
18 determine which IRQ should be used. Therefore, link->irq.IRQInfo2
19 is ignored.
20
21* client->PendingEvents is gone (as of 2.6.11)
22 client->PendingEvents is no longer available.
23
24* client->Attributes are gone (as of 2.6.11)
25 client->Attributes is unused, therefore it is removed from all
26 PCMCIA card drivers
27
28* core functions no longer available (as of 2.6.11)
29 The following functions have been removed from the kernel source
30 because they are unused by all in-kernel drivers, and no external
31 driver was reported to rely on them:
32 pcmcia_get_first_region()
33 pcmcia_get_next_region()
34 pcmcia_modify_window()
35 pcmcia_set_event_mask()
36 pcmcia_get_first_window()
37 pcmcia_get_next_window()
38
39* device list iteration upon module removal (as of 2.6.10)
40 It is no longer necessary to iterate on the driver's internal
41 client list and call the ->detach() function upon module removal.
42
43* Resource management. (as of 2.6.8)
44 Although the PCMCIA subsystem will allocate resources for cards,
45 it no longer marks these resources busy. This means that driver
46 authors are now responsible for claiming your resources as per
47 other drivers in Linux. You should use request_region() to mark
48 your IO regions in-use, and request_mem_region() to mark your
49 memory regions in-use. The name argument should be a pointer to
50 your driver name. Eg, for pcnet_cs, name should point to the
51 string "pcnet_cs".