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 12static 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 23struct 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 45struct 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 88EXPORT_SYMBOL(pnp_find_card); 89EXPORT_SYMBOL(pnp_find_dev); 90