键盘飞梭驱动

联想键盘飞梭驱动程序。看框架再改之~~

#include
#include
#include
#include
#include
#include
#include

/*
* Version Information
*/
#define DRIVER_VERSION ""
#define DRIVER_AUTHOR "TGE HOTKEY "
#define DRIVER_DESC "USB HID Tge hotkey driver"

#define USB_HOTKEY_VENDOR_ID 0x07e4
#define USB_HOTKEY_PRODUCT_ID 0x9473
//厂商和产品ID信息就是/proc/bus/usb/devices中看到的值

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );

struct usb_kbd {
struct input_dev dev;
struct usb_device *usbdev;
unsigned char new[8];
unsigned char old[8];
struct urb irq, led;
//devrequest dr;
//这一行和下一行的区别在于kernel2.4.20版本对usb_kbd键盘结构定义发生了变化
struct usb_ctrlrequest dr;
unsigned char leds, newleds;
char name[128];
int open;
};
//此结构来自内核中drivers/usb/usbkbd..c

static void usb_kbd_irq(struct urb *urb)
{
struct usb_kbd *kbd = urb->context;
int *new;
new = (int *) kbd->new;

if(kbd->new[0] == (char)0x01)
{
if(((kbd->new[1]>>4)&0x0f)!=0x7)
{
handle_scancode(0xe0,1);
handle_scancode(0x4b,1);
handle_scancode(0xe0,0);
handle_scancode(0x4b,0);
}
else
{
handle_scancode(0xe0,1);
handle_scancode(0x4d,1);
handle_scancode(0xe0,0);
handle_scancode(0x4d,0);
}
}


printk("new=%x %x %x %x %x %x %x %x",
kbd->new[0],kbd->new[1],kbd->new[2],kbd->new[3],
kbd->new[4],kbd->new[5],kbd->new[6],kbd->new[7]);

}

static void *usb_kbd_probe(struct usb_device *dev, unsigned int ifnum,
const struct usb_device_id *id)
{
struct usb_interface *iface;
struct usb_interface_descriptor *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_kbd *kbd;
int pipe, maxp;

iface = &dev->actconfig->interface[ifnum];
interface = &iface->altsetting[iface->act_altsetting];

if ((dev->descriptor.idVendor != USB_HOTKEY_VENDOR_ID) ||
(dev->descriptor.idProduct != USB_HOTKEY_PRODUCT_ID) ||
(ifnum != 1))
{
return NULL;
}
if (dev->actconfig->bNumInterfaces != 2)
{
return NULL;
}

if (interface->bNumEndpoints != 1) return NULL;

endpoint = interface->endpoint + 0;

pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

usb_set_protocol(dev, interface->bInterfaceNumber, 0);
usb_set_idle(dev, interface->bInterfaceNumber, 0, 0);

printk(KERN_INFO "GUO: Vid = %.4x, Pid = %.4x, Device = %.2x, ifnum = %.2x, bufCount = %.8x\n",
dev->descriptor.idVendor,dev->descriptor.idProduct,dev->descriptor.bcdDevice, ifnum, maxp);

if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL))) return NULL;
memset(kbd, 0, sizeof(struct usb_kbd));

kbd->usbdev = dev;

FILL_INT_URB(&kbd->irq, dev, pipe, kbd->new, maxp > 8 ? 8 : maxp,
usb_kbd_irq, kbd, endpoint->bInterval);

kbd->irq.dev = kbd->usbdev;

if (dev->descriptor.iManufacturer)
usb_string(dev, dev->descriptor.iManufacturer, kbd->name, 63);

if (usb_submit_urb(&kbd->irq)) {
kfree(kbd);
return NULL;
}

printk(KERN_INFO "input%d: %s on usb%d:%d.%d\n",
kbd->dev.number, kbd->name, dev->bus->busnum, dev->devnum, ifnum);

return kbd;
}

static void usb_kbd_disconnect(struct usb_device *dev, void *ptr)
{
struct usb_kbd *kbd = ptr;
usb_unlink_urb(&kbd->irq);
kfree(kbd);

}

static struct usb_device_id usb_kbd_id_table [] = {
{ USB_DEVICE(USB_HOTKEY_VENDOR_ID, USB_HOTKEY_PRODUCT_ID) },
{ }/* Terminating entry */
};

MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);

static struct usb_driver usb_kbd_driver = {
name:"Hotkey",
probe:usb_kbd_probe,
disconnect:usb_kbd_disconnect,
id_table:usb_kbd_id_table,
NULL,
};

static int __init usb_kbd_init(void)
{
usb_register(&usb_kbd_driver);
info(DRIVER_VERSION ":" DRIVER_DESC);
return 0;
}

static void __exit usb_kbd_exit(void)
{
usb_deregister(&usb_kbd_driver);
}

module_init(usb_kbd_init);
module_exit(usb_kbd_exit);

原文转自：http://www.ltesting.net