kernel-playground/usb-test/usb-test2.c

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/hid.h>
#include <linux/hidraw.h>

#define USB_VENDOR_ID_MICROCHIP         0x04d8

MODULE_LICENSE("GPL");
MODULE_AUTHOR("encrypt");
MODULE_DESCRIPTION("Dummy led");


static int usbio_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
  u8 buf[5] = {0x80, 0x80 };
  hid_hw_start(hdev, HID_CONNECT_HIDRAW);
  hid_hw_raw_request(hdev, buf[0], buf, 2, HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
  return 0;
}

static void usbio_remove(struct hid_device *hdev)
{
  hid_hw_stop(hdev);
}

static const struct hid_device_id usbio_table[] = {
  { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, 0x0003) },
  {}
};

MODULE_DEVICE_TABLE(hid, usbio_table);

static struct hid_driver usbio_driver = {
  .name = "usbio",
  .probe = usbio_probe,
  .remove = usbio_remove,
  .id_table = usbio_table
};

module_hid_driver(usbio_driver);