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local struct pci_bus pci_root;

struct pci_dev *pci_devices = NULL;

void pci_init(void))

{

        pcibios_init();

        if (!pci_present()) {

                printk("PCI: No PCI bus detected\n");

                return;

        }

        printk("PCI: Probing PCI hardware\n");

        memset(&pci_root, 0, sizeof(pci_root));

        pci_root.subordinate = pci_scan_bus(&pci_root);

}

struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device, struct pci_dev *from)

{

        if (!from)

                from = pci_devices;

        else

                from = from->next;

        while (from && (from->vendor != vendor || from->device != device))

                from = from->next;

        return from;

}

struct pci_dev *pci_find_class(unsigned int class, struct pci_dev *from)

{

        if (!from)

                from = pci_devices;

        else

                from = from->next;

        while (from && from->class != class)

                from = from->next;

        return from;

}