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);