/*
* drivers\hid\usbhid\usbmouse.c
*/
#include
#include
#include
#include
#include
#include
static struct input_dev *uk_dev;
static char *usb_buf;
static dma_addr_t usb_buf_phys;
static int len;
static struct urb *uk_urb;
static struct usb_device_id usbmouse_as_key_id_table [] = {
{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
USB_INTERFACE_PROTOCOL_MOUSE) },
//{USB_DEVICE(0x1234,0x5678)},
{ } /* Terminating entry */
};
static void usbmouse_as_key_irq(struct urb *urb)
{
static unsigned char pre_val;
#if 0
int i;
static int cnt = 0;
printk("data cnt %d: ", ++cnt);
for (i = 0; i < len; i++)
{
printk("%02x ", usb_buf[i]);
}
printk("\n");
#endif
/* USB鼠标数据含义
* data[0]: bit0-左键, 1-按下, 0-松开
* bit1-右键, 1-按下, 0-松开
* bit2-中键, 1-按下, 0-松开
*
*/
printk("%02x %02x\n", usb_buf[0],pre_val);
if ((pre_val & (1<<0)) != (usb_buf[0] & (1<<0)))
{
printk("%s %dx\n",__FUNCTION__,__LINE__);
/* 左键发生了变化 */
input_event(uk_dev, EV_KEY, KEY_L, (usb_buf[0] & (1<<0)) ? 1 : 0);
input_sync(uk_dev);
}
if ((pre_val & (1<<1)) != (usb_buf[0] & (1<<1)))
{
/* 右键发生了变化 */
printk("%s %dx\n",__FUNCTION__,__LINE__);
input_event(uk_dev, EV_KEY, KEY_S, (usb_buf[0] & (1<<1)) ? 1 : 0);
input_sync(uk_dev);
}
if ((pre_val & (1<<2)) != (usb_buf[0] & (1<<2)))
{
/* 中键发生了变化 */
printk("%s %dx\n",__FUNCTION__,__LINE__);
input_event(uk_dev, EV_KEY, KEY_ENTER, (usb_buf[0] & (1<<2)) ? 1 : 0);
input_sync(uk_dev);
}
pre_val = usb_buf[0];
/* 重新提交urb */
usb_submit_urb(uk_urb, GFP_KERNEL);
}
static int usbmouse_as_key_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
int pipe;
interface = intf->cur_altsetting;
endpoint = &interface->endpoint[0].desc;
/* a. 分配一个input_dev */
uk_dev = input_allocate_device();
/* b. 设置 */
/* b.1 能产生哪类事件 */
set_bit(EV_KEY, uk_dev->evbit);
set_bit(EV_REP, uk_dev->evbit);
/* b.2 能产生哪些事件 */
set_bit(KEY_L, uk_dev->keybit);
set_bit(KEY_S, uk_dev->keybit);
set_bit(KEY_ENTER, uk_dev->keybit);
/* c. 注册 */
input_register_device(uk_dev);
/* d. 硬件相关操作 */
/* 数据传输3要素: 源,目的,长度 */
/* 源: USB设备的某个端点 */
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
/* 长度: */
len = endpoint->wMaxPacketSize;
/* 目的: */
usb_buf = usb_buffer_alloc(dev, len, GFP_ATOMIC, &usb_buf_phys);
/* 使用"3要素" */
/* 分配usb request block */
uk_urb = usb_alloc_urb(0, GFP_KERNEL);
/* 使用"3要素设置urb" */
usb_fill_int_urb(uk_urb, dev, pipe, usb_buf, len, usbmouse_as_key_irq, NULL, endpoint->bInterval);
uk_urb->transfer_dma = usb_buf_phys;
uk_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* 使用URB */
usb_submit_urb(uk_urb, GFP_KERNEL);
return 0;
}
static void usbmouse_as_key_disconnect(struct usb_interface *intf)
{
struct usb_device *dev = interface_to_usbdev(intf);
//printk("disconnect usbmouse!\n");
usb_kill_urb(uk_urb);
usb_free_urb(uk_urb);
usb_buffer_free(dev, len, usb_buf, usb_buf_phys);
input_unregister_device(uk_dev);
input_free_device(uk_dev);
}
/* 1. 分配/设置usb_driver */
static struct usb_driver usbmouse_as_key_driver = {
.name = "usbmouse_as_key_",
.probe = usbmouse_as_key_probe,
.disconnect = usbmouse_as_key_disconnect,
.id_table = usbmouse_as_key_id_table,
};
static int usbmouse_as_key_init(void)
{
/* 2. 注册 */
usb_register(&usbmouse_as_key_driver);
return 0;
}
static void usbmouse_as_key_exit(void)
{
usb_deregister(&usbmouse_as_key_driver);
}
module_init(usbmouse_as_key_init);
module_exit(usbmouse_as_key_exit);
MODULE_LICENSE("GPL");
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