Linux Device Drivers 3 examples

1 files changed, 63 insertions, 0 deletions

diff --git a/pci/pci_skel.c b/pci/pci_skel.c
new file mode 100644
index 0000000..f115669
--- /dev/null
+++ b/pci/pci_skel.c
@@ -0,0 +1,63 @@
+#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);