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[linux-2.6-omap-h63xx.git] / drivers / pnp / isapnp / compat.c
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/module.h>
12 #include <linux/isapnp.h>
13 #include <linux/string.h>
14
15 static void pnp_convert_id(char *buf, unsigned short vendor,
16                            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, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
24 }
25
26 struct pnp_card *pnp_find_card(unsigned short vendor,
27                                unsigned short device, struct pnp_card *from)
28 {
29         char id[8];
30         char any[8];
31         struct list_head *list;
32         pnp_convert_id(id, vendor, device);
33         pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
34
35         list = from ? from->global_list.next : pnp_cards.next;
36
37         while (list != &pnp_cards) {
38                 struct pnp_card *card = global_to_pnp_card(list);
39                 if (compare_pnp_id(card->id, id) || (memcmp(id, any, 7) == 0))
40                         return card;
41                 list = list->next;
42         }
43         return NULL;
44 }
45
46 struct pnp_dev *pnp_find_dev(struct pnp_card *card,
47                              unsigned short vendor,
48                              unsigned short function, struct pnp_dev *from)
49 {
50         char id[8];
51         char any[8];
52         pnp_convert_id(id, vendor, function);
53         pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
54         if (card == NULL) {     /* look for a logical device from all cards */
55                 struct list_head *list;
56
57                 list = pnp_global.next;
58                 if (from)
59                         list = from->global_list.next;
60
61                 while (list != &pnp_global) {
62                         struct pnp_dev *dev = global_to_pnp_dev(list);
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                         if (compare_pnp_id(dev->id, id))
80                                 return dev;
81                         list = list->next;
82                 }
83         }
84         return NULL;
85 }
86
87 EXPORT_SYMBOL(pnp_find_card);
88 EXPORT_SYMBOL(pnp_find_dev);