struct usb_mouse *mouse = input_get_drvdata(dev);
mouse->irq->dev = mouse->usbdev;
if (usb_submit_urb(mouse->irq, GFP_KERNEL))
return -EIO;
return 0;
}
static void usb_mouse_close(struct input_dev *dev) { struct usb_mouse *mouse = input_get_drvdata(dev);
usb_kill_urb(mouse->irq);
}
static int usb_mouse_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; struct usb_mouse *mouse; struct input_dev *input_dev; int pipe, maxp; int error = -ENOMEM;
interface = intf->cur_altsetting;
//因鼠标就只有一个端点
if (interface->desc.bNumEndpoints != 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint))
return -ENODEV;
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
input_dev = input_allocate_device();
if (!mouse || !input_dev)
goto fail1;
mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma);
if (!mouse->data)
goto fail1;
mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!mouse->irq)
goto fail2;
mouse->usbdev = dev;
mouse->dev = input_dev;
if (dev->manufacturer)
strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
if (dev->product) {
if (dev->manufacturer)
strlcat(mouse->name, " ", sizeof(mouse->name));
strlcat(mouse->name, dev->product, sizeof(mouse->name));
}
if (!strlen(mouse->name))
snprintf(mouse->name, sizeof(mouse->name),
"USB HIDBP Mouse %04x:%04x",
le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
input_dev->name = mouse->name;
input_dev->phys = mouse->phys;
usb_to_input_id(dev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
BIT_MASK(BTN_EXTRA);
input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
input_set_drvdata(input_dev, mouse);
input_dev->open = usb_mouse_open;
input_dev->close = usb_mouse_close;
usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
(maxp > 8 ? 8 : maxp),
usb_mouse_irq, mouse, endpoint->bInterval);
mouse->irq->transfer_dma = mouse->data_dma;
mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = input_register_device(mouse->dev);
if (error)
goto fail3;
usb_set_intfdata(intf, mouse);
return 0;
fail3: usb_free_urb(mouse->irq); fail2: usb_free_coherent(dev, 8, mouse->data, mouse->data_dma); fail1: input_free_device(input_dev); kfree(mouse); return error; }
static void usb_mouse_disconnect(struct usb_interface *intf) { struct usb_mouse *mouse = usb_get_intfdata (intf);
usb_set_intfdata(intf, NULL);
if (mouse) {
usb_kill_urb(mouse->irq);
input_unregister_device(mouse->dev);
usb_free_urb(mouse->irq);
usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
kfree(mouse);
}
}
static struct usb_device_id usb_mouse_id_table [] = { { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, USB_INTERFACE_PROTOCOL_MOUSE) }, { } /* Terminating entry */ };
MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
static struct usb_driver usb_mouse_driver = { .name = "usbmouse", .probe = usb_mouse_probe, .disconnect = usb_mouse_disconnect, .id_table = usb_mouse_id_table, };
module_usb_driver(usb_mouse_driver);
应用层的USB测试代码：
#include <string.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <fcntl.h> #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <fcntl.h> #include <linux/input.h>
#define MACH_NAME "mouse" //匹配的名字 #define EVENT_X_FORMAT "/dev/event%d" //dev目录下设备文件路径 int test_mouse(char *mousedev); //根据设备名查找输入设备的下标 int get_event_x(char *mach_name);
int main(void) { int ret = 0; int x = 0; char file_path_buffer[100]= {0};
x = get_event_x(MACH_NAME);
if(x<0) {
printf("%s不存在!\n",MACH_NAME);
exit(0);
}
sprintf(file_path_buffer,EVENT_X_FORMAT,x);
ret = test_mouse(file_path_buffer);
return ret;
}
int init_device(char *dev) { int fd; if((fd = open(dev, O_RDONLY)) < 0) { printf("Error open %s\n\n", dev); return -1; }
return fd;
}
int test_mouse(char *mousedev) { static struct input_event data; int fd; fd=init_device(mousedev); if( fd < 0) { return -1; }
while(1) {
read(fd, &data, sizeof(data));
if (data.type == EV_KEY) {
printf("type = EV_KEY, code = %s, value = %d\n",
data.code == BTN_LEFT ? "MOUSE_LEFT" :
data.code == BTN_RIGHT ? "MOUSE_RIGHT" :
data.code == BTN_MIDDLE ? "MOUSE_MIDDLE" :
data.code == BTN_SIDE ? "MOUSE_SIDE" :
"Unkonw", data.value);
} else if(data.type == EV_REL) {
printf("type = EV_REL, code = %s, value = %d\n",
data.code == REL_X ? "REL_X" :
data.code == REL_Y ? "REL_Y" :
data.code == ABS_WHEEL ? "MOUSE_WHEEL" :
data.code == ABS_PRESSURE ? "ABS_PRESSURE" :
"Unkown", data.value);
}
}
return 0;
}
//判断文件是否存 int file_is_exist(char *filepath) { int ret; if((access(filepath,F_OK))!=-1) { printf("文件 %s 存在.\n",filepath); ret = 0; } else { printf("%s不存在!\n",filepath); ret = -1; } return ret; }
//根据设备名查找输入设备的下标 int get_event_x(char *mach_name) { //搜索路径 #define EVENT_FILE_FORMAT "/sys/class/input/event%d/device/name" int i= 0; int j; size_t len = 0; ssize_t read; FILE * flip; char *line; char file_path_buffer[100]= {0}; char file_data_buffer[100]= {0}; char tem_mach_name[100]= {0}; for(i=0; i<32; i++) { sprintf(file_path_buffer,EVENT_FILE_FORMAT,i); if(!file_is_exist(file_path_buffer)) { flip = fopen(file_path_buffer, "r"); if(flip==NULL) { printf("cant open the file\n"); continue; }
//fread(file_data_buffer,100,1,flip);
read = getline(&line, &len, flip);
if(read == -1)
{
printf("read the file error\n");
return -1;
}
stpncpy(file_data_buffer,line,read );
if (line)
free(line);
printf("%s\n",file_data_buffer);
j = 0;
while(file_data_buffer[j++]) {
file_data_buffer[j] = tolower(file_data_buffer[j]);
}
j = 0;
while(tem_mach_name[j++]) {
tem_mach_name[j] = tolower(mach_name[j]);
}
if(strstr(file_data_buffer,mach_name)) {
return i;
}
}
}
