1 // SPDX-License-Identifier: GPL-2.0+
2 /* Siemens ID Mouse driver v0.6
7 Derived from the USB Skeleton driver 1.1,
10 Additional information provided by Martin Reising
15 #include <linux/kernel.h>
16 #include <linux/sched/signal.h>
17 #include <linux/errno.h>
18 #include <linux/delay.h>
19 #include <linux/slab.h>
20 #include <linux/module.h>
21 #include <linux/completion.h>
22 #include <linux/mutex.h>
23 #include <linux/uaccess.h>
24 #include <linux/usb.h>
29 #define HEADER "P5 225 289 255 "
30 #define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
32 #define DRIVER_SHORT "idmouse"
34 #define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
36 /* minor number for misc USB devices */
37 #define USB_IDMOUSE_MINOR_BASE 132
39 /* vendor and device IDs */
40 #define ID_SIEMENS 0x0681
41 #define ID_IDMOUSE 0x0005
42 #define ID_CHERRY 0x0010
45 static const struct usb_device_id idmouse_table[] = {
46 {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
47 {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
48 {} /* terminating null entry */
52 #define FTIP_RESET 0x20
53 #define FTIP_ACQUIRE 0x21
54 #define FTIP_RELEASE 0x22
55 #define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
56 #define FTIP_SCROLL 0x24
58 #define ftip_command(dev, command, value, index) \
59 usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
60 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
62 MODULE_DEVICE_TABLE(usb, idmouse_table);
63 static DEFINE_MUTEX(open_disc_mutex);
65 /* structure to hold all of our device specific stuff */
68 struct usb_device *udev; /* save off the usb device pointer */
69 struct usb_interface *interface; /* the interface for this device */
71 unsigned char *bulk_in_buffer; /* the buffer to receive data */
72 size_t bulk_in_size; /* the maximum bulk packet size */
73 size_t orig_bi_size; /* same as above, but reported by the device */
74 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
76 int open; /* if the port is open or not */
77 int present; /* if the device is not disconnected */
78 struct mutex lock; /* locks this structure */
82 /* local function prototypes */
83 static ssize_t idmouse_read(struct file *file, char __user *buffer,
84 size_t count, loff_t * ppos);
86 static int idmouse_open(struct inode *inode, struct file *file);
87 static int idmouse_release(struct inode *inode, struct file *file);
89 static int idmouse_probe(struct usb_interface *interface,
90 const struct usb_device_id *id);
92 static void idmouse_disconnect(struct usb_interface *interface);
93 static int idmouse_suspend(struct usb_interface *intf, pm_message_t message);
94 static int idmouse_resume(struct usb_interface *intf);
96 /* file operation pointers */
97 static const struct file_operations idmouse_fops = {
100 .open = idmouse_open,
101 .release = idmouse_release,
102 .llseek = default_llseek,
105 /* class driver information */
106 static struct usb_class_driver idmouse_class = {
108 .fops = &idmouse_fops,
109 .minor_base = USB_IDMOUSE_MINOR_BASE,
112 /* usb specific object needed to register this driver with the usb subsystem */
113 static struct usb_driver idmouse_driver = {
114 .name = DRIVER_SHORT,
115 .probe = idmouse_probe,
116 .disconnect = idmouse_disconnect,
117 .suspend = idmouse_suspend,
118 .resume = idmouse_resume,
119 .reset_resume = idmouse_resume,
120 .id_table = idmouse_table,
121 .supports_autosuspend = 1,
124 static int idmouse_create_image(struct usb_idmouse *dev)
130 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
131 bytes_read = sizeof(HEADER)-1;
133 /* reset the device and set a fast blink rate */
134 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
137 result = ftip_command(dev, FTIP_BLINK, 1, 0);
141 /* initialize the sensor - sending this command twice */
142 /* significantly reduces the rate of failed reads */
143 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
146 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
150 /* start the readout - sending this command twice */
151 /* presumably enables the high dynamic range mode */
152 result = ftip_command(dev, FTIP_RESET, 0, 0);
155 result = ftip_command(dev, FTIP_RESET, 0, 0);
159 /* loop over a blocking bulk read to get data from the device */
160 while (bytes_read < IMGSIZE) {
161 result = usb_bulk_msg (dev->udev,
162 usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
163 dev->bulk_in_buffer + bytes_read,
164 dev->bulk_in_size, &bulk_read, 5000);
166 /* Maybe this error was caused by the increased packet size? */
167 /* Reset to the original value and tell userspace to retry. */
168 if (dev->bulk_in_size != dev->orig_bi_size) {
169 dev->bulk_in_size = dev->orig_bi_size;
174 if (signal_pending(current)) {
178 bytes_read += bulk_read;
181 /* reset the device */
183 ftip_command(dev, FTIP_RELEASE, 0, 0);
185 /* check for valid image */
186 /* right border should be black (0x00) */
187 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
188 if (dev->bulk_in_buffer[bytes_read] != 0x00)
191 /* lower border should be white (0xFF) */
192 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
193 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
196 /* should be IMGSIZE == 65040 */
197 dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n",
202 /* PM operations are nops as this driver does IO only during open() */
203 static int idmouse_suspend(struct usb_interface *intf, pm_message_t message)
208 static int idmouse_resume(struct usb_interface *intf)
213 static inline void idmouse_delete(struct usb_idmouse *dev)
215 kfree(dev->bulk_in_buffer);
219 static int idmouse_open(struct inode *inode, struct file *file)
221 struct usb_idmouse *dev;
222 struct usb_interface *interface;
225 /* get the interface from minor number and driver information */
226 interface = usb_find_interface (&idmouse_driver, iminor (inode));
230 mutex_lock(&open_disc_mutex);
231 /* get the device information block from the interface */
232 dev = usb_get_intfdata(interface);
234 mutex_unlock(&open_disc_mutex);
238 /* lock this device */
239 mutex_lock(&dev->lock);
240 mutex_unlock(&open_disc_mutex);
242 /* check if already open */
245 /* already open, so fail */
250 /* create a new image and check for success */
251 result = usb_autopm_get_interface(interface);
254 result = idmouse_create_image (dev);
255 usb_autopm_put_interface(interface);
259 /* increment our usage count for the driver */
262 /* save our object in the file's private structure */
263 file->private_data = dev;
269 /* unlock this device */
270 mutex_unlock(&dev->lock);
274 static int idmouse_release(struct inode *inode, struct file *file)
276 struct usb_idmouse *dev;
278 dev = file->private_data;
283 mutex_lock(&open_disc_mutex);
284 /* lock our device */
285 mutex_lock(&dev->lock);
287 /* are we really open? */
288 if (dev->open <= 0) {
289 mutex_unlock(&dev->lock);
290 mutex_unlock(&open_disc_mutex);
297 /* the device was unplugged before the file was released */
298 mutex_unlock(&dev->lock);
299 mutex_unlock(&open_disc_mutex);
302 mutex_unlock(&dev->lock);
303 mutex_unlock(&open_disc_mutex);
308 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
311 struct usb_idmouse *dev = file->private_data;
314 /* lock this object */
315 mutex_lock(&dev->lock);
317 /* verify that the device wasn't unplugged */
319 mutex_unlock(&dev->lock);
323 result = simple_read_from_buffer(buffer, count, ppos,
324 dev->bulk_in_buffer, IMGSIZE);
325 /* unlock the device */
326 mutex_unlock(&dev->lock);
330 static int idmouse_probe(struct usb_interface *interface,
331 const struct usb_device_id *id)
333 struct usb_device *udev = interface_to_usbdev(interface);
334 struct usb_idmouse *dev;
335 struct usb_host_interface *iface_desc;
336 struct usb_endpoint_descriptor *endpoint;
339 /* check if we have gotten the data or the hid interface */
340 iface_desc = &interface->altsetting[0];
341 if (iface_desc->desc.bInterfaceClass != 0x0A)
344 if (iface_desc->desc.bNumEndpoints < 1)
347 /* allocate memory for our device state and initialize it */
348 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
352 mutex_init(&dev->lock);
354 dev->interface = interface;
356 /* set up the endpoint information - use only the first bulk-in endpoint */
357 result = usb_find_bulk_in_endpoint(iface_desc, &endpoint);
359 dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n");
364 dev->orig_bi_size = usb_endpoint_maxp(endpoint);
365 dev->bulk_in_size = 0x200; /* works _much_ faster */
366 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
367 dev->bulk_in_buffer = kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
368 if (!dev->bulk_in_buffer) {
373 /* allow device read, write and ioctl */
376 /* we can register the device now, as it is ready */
377 usb_set_intfdata(interface, dev);
378 result = usb_register_dev(interface, &idmouse_class);
380 /* something prevented us from registering this device */
381 dev_err(&interface->dev, "Unable to allocate minor number.\n");
382 usb_set_intfdata(interface, NULL);
388 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
393 static void idmouse_disconnect(struct usb_interface *interface)
395 struct usb_idmouse *dev;
397 /* get device structure */
398 dev = usb_get_intfdata(interface);
400 /* give back our minor */
401 usb_deregister_dev(interface, &idmouse_class);
403 mutex_lock(&open_disc_mutex);
404 usb_set_intfdata(interface, NULL);
405 /* lock the device */
406 mutex_lock(&dev->lock);
407 mutex_unlock(&open_disc_mutex);
409 /* prevent device read, write and ioctl */
412 /* if the device is opened, idmouse_release will clean this up */
414 mutex_unlock(&dev->lock);
418 mutex_unlock(&dev->lock);
421 dev_info(&interface->dev, "disconnected\n");
424 module_usb_driver(idmouse_driver);
426 MODULE_AUTHOR(DRIVER_AUTHOR);
427 MODULE_DESCRIPTION(DRIVER_DESC);
428 MODULE_LICENSE("GPL");