Linux Kernel  3.7.1
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compat.c
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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 <[email protected]>
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