kernel/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 #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);