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);
64 /* structure to hold all of our device specific stuff */
67 struct usb_device *udev; /* save off the usb device pointer */
68 struct usb_interface *interface; /* the interface for this device */
70 unsigned char *bulk_in_buffer; /* the buffer to receive data */
71 size_t bulk_in_size; /* the maximum bulk packet size */
72 size_t orig_bi_size; /* same as above, but reported by the device */
73 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
75 int open; /* if the port is open or not */
76 int present; /* if the device is not disconnected */
77 struct mutex lock; /* locks this structure */
81 /* local function prototypes */
82 static ssize_t idmouse_read(struct file *file, char __user *buffer,
83 size_t count, loff_t * ppos);
85 static int idmouse_open(struct inode *inode, struct file *file);
86 static int idmouse_release(struct inode *inode, struct file *file);
88 static int idmouse_probe(struct usb_interface *interface,
89 const struct usb_device_id *id);
91 static void idmouse_disconnect(struct usb_interface *interface);
92 static int idmouse_suspend(struct usb_interface *intf, pm_message_t message);
93 static int idmouse_resume(struct usb_interface *intf);
95 /* file operation pointers */
96 static const struct file_operations idmouse_fops = {
100 .release = idmouse_release,
101 .llseek = default_llseek,
104 /* class driver information */
105 static struct usb_class_driver idmouse_class = {
107 .fops = &idmouse_fops,
108 .minor_base = USB_IDMOUSE_MINOR_BASE,
111 /* usb specific object needed to register this driver with the usb subsystem */
112 static struct usb_driver idmouse_driver = {
113 .name = DRIVER_SHORT,
114 .probe = idmouse_probe,
115 .disconnect = idmouse_disconnect,
116 .suspend = idmouse_suspend,
117 .resume = idmouse_resume,
118 .reset_resume = idmouse_resume,
119 .id_table = idmouse_table,
120 .supports_autosuspend = 1,
123 static int idmouse_create_image(struct usb_idmouse *dev)
129 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
130 bytes_read = sizeof(HEADER)-1;
132 /* reset the device and set a fast blink rate */
133 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
136 result = ftip_command(dev, FTIP_BLINK, 1, 0);
140 /* initialize the sensor - sending this command twice */
141 /* significantly reduces the rate of failed reads */
142 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
145 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
149 /* start the readout - sending this command twice */
150 /* presumably enables the high dynamic range mode */
151 result = ftip_command(dev, FTIP_RESET, 0, 0);
154 result = ftip_command(dev, FTIP_RESET, 0, 0);
158 /* loop over a blocking bulk read to get data from the device */
159 while (bytes_read < IMGSIZE) {
160 result = usb_bulk_msg(dev->udev,
161 usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr),
162 dev->bulk_in_buffer + bytes_read,
163 dev->bulk_in_size, &bulk_read, 5000);
165 /* Maybe this error was caused by the increased packet size? */
166 /* Reset to the original value and tell userspace to retry. */
167 if (dev->bulk_in_size != dev->orig_bi_size) {
168 dev->bulk_in_size = dev->orig_bi_size;
173 if (signal_pending(current)) {
177 bytes_read += bulk_read;
180 /* check for valid image */
181 /* right border should be black (0x00) */
182 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
183 if (dev->bulk_in_buffer[bytes_read] != 0x00)
186 /* lower border should be white (0xFF) */
187 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
188 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
191 /* reset the device */
193 ftip_command(dev, FTIP_RELEASE, 0, 0);
195 /* should be IMGSIZE == 65040 */
196 dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n",
201 /* PM operations are nops as this driver does IO only during open() */
202 static int idmouse_suspend(struct usb_interface *intf, pm_message_t message)
207 static int idmouse_resume(struct usb_interface *intf)
212 static inline void idmouse_delete(struct usb_idmouse *dev)
214 kfree(dev->bulk_in_buffer);
218 static int idmouse_open(struct inode *inode, struct file *file)
220 struct usb_idmouse *dev;
221 struct usb_interface *interface;
224 /* get the interface from minor number and driver information */
225 interface = usb_find_interface(&idmouse_driver, iminor(inode));
229 /* get the device information block from the interface */
230 dev = usb_get_intfdata(interface);
234 /* lock this device */
235 mutex_lock(&dev->lock);
237 /* check if already open */
240 /* already open, so fail */
245 /* create a new image and check for success */
246 result = usb_autopm_get_interface(interface);
249 result = idmouse_create_image(dev);
250 usb_autopm_put_interface(interface);
254 /* increment our usage count for the driver */
257 /* save our object in the file's private structure */
258 file->private_data = dev;
264 /* unlock this device */
265 mutex_unlock(&dev->lock);
269 static int idmouse_release(struct inode *inode, struct file *file)
271 struct usb_idmouse *dev;
273 dev = file->private_data;
278 /* lock our device */
279 mutex_lock(&dev->lock);
284 /* the device was unplugged before the file was released */
285 mutex_unlock(&dev->lock);
288 mutex_unlock(&dev->lock);
293 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
296 struct usb_idmouse *dev = file->private_data;
299 /* lock this object */
300 mutex_lock(&dev->lock);
302 /* verify that the device wasn't unplugged */
304 mutex_unlock(&dev->lock);
308 result = simple_read_from_buffer(buffer, count, ppos,
309 dev->bulk_in_buffer, IMGSIZE);
310 /* unlock the device */
311 mutex_unlock(&dev->lock);
315 static int idmouse_probe(struct usb_interface *interface,
316 const struct usb_device_id *id)
318 struct usb_device *udev = interface_to_usbdev(interface);
319 struct usb_idmouse *dev;
320 struct usb_host_interface *iface_desc;
321 struct usb_endpoint_descriptor *endpoint;
324 /* check if we have gotten the data or the hid interface */
325 iface_desc = interface->cur_altsetting;
326 if (iface_desc->desc.bInterfaceClass != 0x0A)
329 if (iface_desc->desc.bNumEndpoints < 1)
332 /* allocate memory for our device state and initialize it */
333 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
337 mutex_init(&dev->lock);
339 dev->interface = interface;
341 /* set up the endpoint information - use only the first bulk-in endpoint */
342 result = usb_find_bulk_in_endpoint(iface_desc, &endpoint);
344 dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n");
349 dev->orig_bi_size = usb_endpoint_maxp(endpoint);
350 dev->bulk_in_size = 0x200; /* works _much_ faster */
351 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
352 dev->bulk_in_buffer = kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
353 if (!dev->bulk_in_buffer) {
358 /* allow device read, write and ioctl */
361 /* we can register the device now, as it is ready */
362 usb_set_intfdata(interface, dev);
363 result = usb_register_dev(interface, &idmouse_class);
365 /* something prevented us from registering this device */
366 dev_err(&interface->dev, "Unable to allocate minor number.\n");
372 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
377 static void idmouse_disconnect(struct usb_interface *interface)
379 struct usb_idmouse *dev = usb_get_intfdata(interface);
381 /* give back our minor */
382 usb_deregister_dev(interface, &idmouse_class);
384 /* lock the device */
385 mutex_lock(&dev->lock);
387 /* prevent device read, write and ioctl */
390 /* if the device is opened, idmouse_release will clean this up */
392 mutex_unlock(&dev->lock);
396 mutex_unlock(&dev->lock);
399 dev_info(&interface->dev, "disconnected\n");
402 module_usb_driver(idmouse_driver);
404 MODULE_AUTHOR(DRIVER_AUTHOR);
405 MODULE_DESCRIPTION(DRIVER_DESC);
406 MODULE_LICENSE("GPL");