root/ldd3-samples-1.0.0/pci/pci_skel.c

DEFINITIONS

1. skel_get_revision
2. probe
3. remove
4. pci_skel_init
5. pci_skel_exit

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>


static struct pci_device_id ids[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3), },
        { 0, }
};
MODULE_DEVICE_TABLE(pci, ids);

static unsigned char skel_get_revision(struct pci_dev *dev)
{
        u8 revision;

        pci_read_config_byte(dev, PCI_REVISION_ID, &revision);
        return revision;
}

static int probe(struct pci_dev *dev, const struct pci_device_id *id)
{
        /* Do probing type stuff here.  
         * Like calling request_region();
         */
        pci_enable_device(dev);
        
        if (skel_get_revision(dev) == 0x42)
                return -ENODEV;


        return 0;
}

static void remove(struct pci_dev *dev)
{
        /* clean up any allocated resources and stuff here.
         * like call release_region();
         */
}

static struct pci_driver pci_driver = {
        .name = "pci_skel",
        .id_table = ids,
        .probe = probe,
        .remove = remove,
};

static int __init pci_skel_init(void)
{
        return pci_register_driver(&pci_driver);
}

static void __exit pci_skel_exit(void)
{
        pci_unregister_driver(&pci_driver);
}

MODULE_LICENSE("GPL");

module_init(pci_skel_init);
module_exit(pci_skel_exit);