example.c

来自「linux~{OBOTJ>KySP~}pci~{Ih18~}」· C语言 代码 · 共 33 行

/*
 *	The PCI Library -- Example of use (simplistic lister of PCI devices)
 *
 *	Written by Martin Mares and put to public domain. You can do
 *	with it anything you want, but I don't give you any warranty.
 */

#include <stdio.h>

#include "pci.h"

int main(void)
{
  struct pci_access *pacc;
  struct pci_dev *dev;
  unsigned int c;

  pacc = pci_alloc();		/* Get the pci_access structure */
  /* Set all options you want -- here we stick with the defaults */
  pci_init(pacc);		/* Initialize the PCI library */
  pci_scan_bus(pacc);		/* We want to get the list of devices */
  for(dev=pacc->devices; dev; dev=dev->next)	/* Iterate over all devices */
    {
      pci_fill_info(dev, PCI_FILL_IDENT | PCI_FILL_BASES);	/* Fill in header info we need */
      c = pci_read_word(dev, PCI_CLASS_DEVICE);	/* Read config register directly */
      printf("%02x:%02x.%d vendor=%04x device=%04x class=%04x irq=%d base0=%lx\n",
	     dev->bus, dev->dev, dev->func, dev->vendor_id, dev->device_id,
	     c, dev->irq, dev->base_addr[0]);
    }
  pci_cleanup(pacc);		/* Close everything */
  return 0;
}