lib/names-hwdb.c

   1 /*
   2  *      The PCI Library -- Looking up Names via UDEV and HWDB
   3  *
   4  *      Copyright (c) 2013--2014 Tom Gundersen <teg@jklm.no>
   5  *      Copyright (c) 2014 Martin Mares <mj@ucw.cz>
   6  *
   7  *      Can be freely distributed and used under the terms of the GNU GPL.
   8  */
   9
  10 #include <string.h>
  11
  12 #include "internal.h"
  13 #include "names.h"
  14
  15 #ifdef PCI_HAVE_HWDB
  16
  17 #include <libudev.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20
  21 char *
  22 pci_id_hwdb_lookup(struct pci_access *a, int cat, int id1, int id2, int id3, int id4)
  23 {
  24   char modalias[64];
  25   const char *key = NULL;
  26
  27   const char *disabled = pci_get_param(a, "hwdb.disable");
  28   if (disabled && atoi(disabled))
  29     return NULL;
  30
  31   switch (cat)
  32     {
  33     case ID_VENDOR:
  34       sprintf(modalias, "pci:v%08X*", id1);
  35       key = "ID_VENDOR_FROM_DATABASE";
  36       break;
  37     case ID_DEVICE:
  38       sprintf(modalias, "pci:v%08Xd%08X*", id1, id2);
  39       key = "ID_MODEL_FROM_DATABASE";
  40       break;
  41     case ID_SUBSYSTEM:
  42       sprintf(modalias, "pci:v%08Xd%08Xsv%08Xsd%08X*", id1, id2, id3, id4);
  43       key = "ID_MODEL_FROM_DATABASE";
  44       break;
  45     case ID_GEN_SUBSYSTEM:
  46       sprintf(modalias, "pci:v*d*sv%08Xsd%08X*", id1, id2);
  47       key = "ID_MODEL_FROM_DATABASE";
  48       break;
  49     case ID_CLASS:
  50       sprintf(modalias, "pci:v*d*sv*sd*bc%02X*", id1);
  51       key = "ID_PCI_CLASS_FROM_DATABASE";
  52       break;
  53     case ID_SUBCLASS:
  54       sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02X*", id1, id2);
  55       key = "ID_PCI_SUBCLASS_FROM_DATABASE";
  56       break;
  57     case ID_PROGIF:
  58       sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02Xi%02X*", id1, id2, id3);
  59       key = "ID_PCI_INTERFACE_FROM_DATABASE";
  60       break;
  61     }
  62
  63   if (key)
  64     {
  65       if (!a->id_udev_hwdb)
  66         {
  67           a->debug("Initializing UDEV HWDB\n");
  68           a->id_udev = udev_new();
  69           a->id_udev_hwdb = udev_hwdb_new(a->id_udev);
  70         }
  71
  72       struct udev_list_entry *entry;
  73       udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(a->id_udev_hwdb, modalias, 0))
  74         if (strcmp(udev_list_entry_get_name(entry), key) == 0)
  75           return pci_strdup(a, udev_list_entry_get_value(entry));
  76     }
  77
  78   return NULL;
  79 }
  80
  81 void
  82 pci_id_hwdb_free(struct pci_access *a)
  83 {
  84   if (a->id_udev_hwdb)
  85     {
  86       udev_hwdb_unref(a->id_udev_hwdb);
  87       a->id_udev_hwdb = NULL;
  88     }
  89   if (a->id_udev)
  90     {
  91       udev_unref(a->id_udev);
  92       a->id_udev = NULL;
  93     }
  94 }
  95
  96 #else
  97
  98 char *
  99 pci_id_hwdb_lookup(struct pci_access *a UNUSED, int cat UNUSED, int id1 UNUSED, int id2 UNUSED, int id3 UNUSED, int id4 UNUSED)
 100 {
 101   return NULL;
 102 }
 103
 104 void
 105 pci_id_hwdb_free(struct pci_access *a UNUSED)
 106 {
 107 }
 108
 109 #endif