example.c

   1 /*
   2  *      The PCI Library -- Example of use (simplistic lister of PCI devices)
   3  *
   4  *      Written by Martin Mares and put to public domain. You can do
   5  *      with it anything you want, but I don't give you any warranty.
   6  */
   7
   8 #include <stdio.h>
   9
  10 #include "lib/pci.h"
  11
  12 int main(void)
  13 {
  14   struct pci_access *pacc;
  15   struct pci_dev *dev;
  16   unsigned int c;
  17   char namebuf[1024], *name;
  18
  19   pacc = pci_alloc();           /* Get the pci_access structure */
  20   /* Set all options you want -- here we stick with the defaults */
  21   pci_init(pacc);               /* Initialize the PCI library */
  22   pci_scan_bus(pacc);           /* We want to get the list of devices */
  23   for (dev=pacc->devices; dev; dev=dev->next)   /* Iterate over all devices */
  24     {
  25       pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_CLASS);     /* Fill in header info we need */
  26       c = pci_read_byte(dev, PCI_INTERRUPT_PIN);                                /* Read config register directly */
  27       printf("%04x:%02x:%02x.%d vendor=%04x device=%04x class=%04x irq=%d (pin %d) base0=%lx",
  28              dev->domain, dev->bus, dev->dev, dev->func, dev->vendor_id, dev->device_id,
  29              dev->device_class, dev->irq, c, (long) dev->base_addr[0]);
  30
  31       /* Look up and print the full name of the device */
  32       name = pci_lookup_name(pacc, namebuf, sizeof(namebuf), PCI_LOOKUP_DEVICE, dev->vendor_id, dev->device_id);
  33       printf(" (%s)\n", name);
  34     }
  35   pci_cleanup(pacc);            /* Close everything */
  36   return 0;
  37 }