USB kbtab linux 驱动代码

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
#include <asm/unaligned.h>

/*

• Pressure-threshold modules param code from
  */

MODULE_AUTHOR(“xxx”);
MODULE_DESCRIPTION(“USB KB Gear JamStudio Tablet driver”);
MODULE_LICENSE(“GPL”);

#define USB_VENDOR_ID_KBGEAR 0x084e

static int kb_pressure_click = 0x10;
module_param(kb_pressure_click, int, 0);
MODULE_PARM_DESC(kb_pressure_click, “pressure threshold for clicks”);

struct kbtab {
unsigned char *data;
dma_addr_t data_dma;
struct input_dev *dev;
struct usb_interface *intf;
struct urb *irq;
char phys[32];
};

static void kbtab_irq(struct urb *urb)
{
struct kbtab *kbtab = urb->context;
unsigned char *data = kbtab->data;
struct input_dev *dev