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path: root/drivers/pnp/isapnp/compat.c
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-rw-r--r--drivers/pnp/isapnp/compat.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/pnp/isapnp/compat.c b/drivers/pnp/isapnp/compat.c
new file mode 100644
index 000000000000..3ff7e76b33bd
--- /dev/null
+++ b/drivers/pnp/isapnp/compat.c
@@ -0,0 +1,91 @@
1/*
2 * compat.c - A series of functions to make it easier to convert drivers that use
3 * the old isapnp APIs. If possible use the new APIs instead.
4 *
5 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
6 *
7 */
8
9/* TODO: see if more isapnp functions are needed here */
10
11#include <linux/config.h>
12#include <linux/module.h>
13#include <linux/isapnp.h>
14#include <linux/string.h>
15
16static void pnp_convert_id(char *buf, unsigned short vendor, unsigned short device)
17{
18 sprintf(buf, "%c%c%c%x%x%x%x",
19 'A' + ((vendor >> 2) & 0x3f) - 1,
20 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
21 'A' + ((vendor >> 8) & 0x1f) - 1,
22 (device >> 4) & 0x0f,
23 device & 0x0f,
24 (device >> 12) & 0x0f,
25 (device >> 8) & 0x0f);
26}
27
28struct pnp_card *pnp_find_card(unsigned short vendor,
29 unsigned short device,
30 struct pnp_card *from)
31{
32 char id[8];
33 char any[8];
34 struct list_head *list;
35 pnp_convert_id(id, vendor, device);
36 pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
37
38 list = from ? from->global_list.next : pnp_cards.next;
39
40 while (list != &pnp_cards) {
41 struct pnp_card *card = global_to_pnp_card(list);
42 if (compare_pnp_id(card->id,id) || (memcmp(id,any,7)==0))
43 return card;
44 list = list->next;
45 }
46 return NULL;
47}
48
49struct pnp_dev *pnp_find_dev(struct pnp_card *card,
50 unsigned short vendor,
51 unsigned short function,
52 struct pnp_dev *from)
53{
54 char id[8];
55 char any[8];
56 pnp_convert_id(id, vendor, function);
57 pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
58 if (card == NULL) { /* look for a logical device from all cards */
59 struct list_head *list;
60
61 list = pnp_global.next;
62 if (from)
63 list = from->global_list.next;
64
65 while (list != &pnp_global) {
66 struct pnp_dev *dev = global_to_pnp_dev(list);
67 if (compare_pnp_id(dev->id,id) || (memcmp(id,any,7)==0))
68 return dev;
69 list = list->next;
70 }
71 } else {
72 struct list_head *list;
73
74 list = card->devices.next;
75 if (from) {
76 list = from->card_list.next;
77 if (from->card != card) /* something is wrong */
78 return NULL;
79 }
80 while (list != &card->devices) {
81 struct pnp_dev *dev = card_to_pnp_dev(list);
82 if (compare_pnp_id(dev->id,id))
83 return dev;
84 list = list->next;
85 }
86 }
87 return NULL;
88}
89
90EXPORT_SYMBOL(pnp_find_card);
91EXPORT_SYMBOL(pnp_find_dev);