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 #include <linux/module.h>
9 #include <linux/isapnp.h>
10 #include <linux/string.h>
11
12 static void pnp_convert_id(char *buf, unsigned short vendor,
13 unsigned short device)
14 {
15 sprintf(buf, "%c%c%c%x%x%x%x",
16 'A' + ((vendor >> 2) & 0x3f) - 1,
17 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
18 'A' + ((vendor >> 8) & 0x1f) - 1,
19 (device >> 4) & 0x0f, device & 0x0f,
20 (device >> 12) & 0x0f, (device >> 8) & 0x0f);
21 }
22
23 struct pnp_card *pnp_find_card(unsigned short vendor, unsigned short device,
24 struct pnp_card *from)
25 {
26 char id[8];
27 char any[8];
28 struct list_head *list;
29
30 pnp_convert_id(id, vendor, device);
31 pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
32
33 list = from ? from->global_list.next : pnp_cards.next;
34
35 while (list != &pnp_cards) {
36 struct pnp_card *card = global_to_pnp_card(list);
37
38 if (compare_pnp_id(card->id, id) || (memcmp(id, any, 7) == 0))
39 return card;
40 list = list->next;
41 }
42 return NULL;
43 }
44
45 struct pnp_dev *pnp_find_dev(struct pnp_card *card, unsigned short vendor,
46 unsigned short function, struct pnp_dev *from)
47 {
48 char id[8];
49 char any[8];
50
51 pnp_convert_id(id, vendor, function);
52 pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
53 if (card == NULL) { /* look for a logical device from all cards */
54 struct list_head *list;
55
56 list = pnp_global.next;
57 if (from)
58 list = from->global_list.next;
59
60 while (list != &pnp_global) {
61 struct pnp_dev *dev = global_to_pnp_dev(list);
62
63 if (compare_pnp_id(dev->id, id) ||
64 (memcmp(id, any, 7) == 0))
65 return dev;
66 list = list->next;
67 }
68 } else {
69 struct list_head *list;
70
71 list = card->devices.next;
72 if (from) {
73 list = from->card_list.next;
74 if (from->card != card) /* something is wrong */
75 return NULL;
76 }
77 while (list != &card->devices) {
78 struct pnp_dev *dev = card_to_pnp_dev(list);
79
80 if (compare_pnp_id(dev->id, id))
81 return dev;
82 list = list->next;
83 }
84 }
85 return NULL;
86 }
87
88 EXPORT_SYMBOL(pnp_find_card);
89 EXPORT_SYMBOL(pnp_find_dev);
90
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