1 /* Siemens ID Mouse driver v0.6
3 This program is free software; you can redistribute it and/or
4 modify it under the terms of the GNU General Public License as
5 published by the Free Software Foundation; either version 2 of
6 the License, or (at your option) any later version.
8 Copyright (C) 2004-5 by Florian 'Floe' Echtler <echtler@fs.tum.de>
9 and Andreas 'ad' Deresch <aderesch@fs.tum.de>
11 Derived from the USB Skeleton driver 1.1,
12 Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com)
14 Additional information provided by Martin Reising
15 <Martin.Reising@natural-computing.de>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/delay.h>
22 #include <linux/init.h>
23 #include <linux/slab.h>
24 #include <linux/module.h>
25 #include <linux/completion.h>
26 #include <linux/mutex.h>
27 #include <asm/uaccess.h>
28 #include <linux/usb.h>
33 #define HEADER "P5 225 289 255 "
34 #define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
36 /* version information */
37 #define DRIVER_VERSION "0.6"
38 #define DRIVER_SHORT "idmouse"
39 #define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>"
40 #define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
42 /* minor number for misc USB devices */
43 #define USB_IDMOUSE_MINOR_BASE 132
45 /* vendor and device IDs */
46 #define ID_SIEMENS 0x0681
47 #define ID_IDMOUSE 0x0005
48 #define ID_CHERRY 0x0010
51 static struct usb_device_id idmouse_table[] = {
52 {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
53 {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
54 {} /* terminating null entry */
58 #define FTIP_RESET 0x20
59 #define FTIP_ACQUIRE 0x21
60 #define FTIP_RELEASE 0x22
61 #define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
62 #define FTIP_SCROLL 0x24
64 #define ftip_command(dev, command, value, index) \
65 usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
66 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
68 MODULE_DEVICE_TABLE(usb, idmouse_table);
69 static DEFINE_MUTEX(open_disc_mutex);
71 /* structure to hold all of our device specific stuff */
74 struct usb_device *udev; /* save off the usb device pointer */
75 struct usb_interface *interface; /* the interface for this device */
77 unsigned char *bulk_in_buffer; /* the buffer to receive data */
78 size_t bulk_in_size; /* the maximum bulk packet size */
79 size_t orig_bi_size; /* same as above, but reported by the device */
80 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
82 int open; /* if the port is open or not */
83 int present; /* if the device is not disconnected */
84 struct mutex lock; /* locks this structure */
88 /* local function prototypes */
89 static ssize_t idmouse_read(struct file *file, char __user *buffer,
90 size_t count, loff_t * ppos);
92 static int idmouse_open(struct inode *inode, struct file *file);
93 static int idmouse_release(struct inode *inode, struct file *file);
95 static int idmouse_probe(struct usb_interface *interface,
96 const struct usb_device_id *id);
98 static void idmouse_disconnect(struct usb_interface *interface);
100 /* file operation pointers */
101 static const struct file_operations idmouse_fops = {
102 .owner = THIS_MODULE,
103 .read = idmouse_read,
104 .open = idmouse_open,
105 .release = idmouse_release,
108 /* class driver information */
109 static struct usb_class_driver idmouse_class = {
111 .fops = &idmouse_fops,
112 .minor_base = USB_IDMOUSE_MINOR_BASE,
115 /* usb specific object needed to register this driver with the usb subsystem */
116 static struct usb_driver idmouse_driver = {
117 .name = DRIVER_SHORT,
118 .probe = idmouse_probe,
119 .disconnect = idmouse_disconnect,
120 .id_table = idmouse_table,
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 /* reset the device */
182 ftip_command(dev, FTIP_RELEASE, 0, 0);
184 /* check for valid image */
185 /* right border should be black (0x00) */
186 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
187 if (dev->bulk_in_buffer[bytes_read] != 0x00)
190 /* lower border should be white (0xFF) */
191 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
192 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
195 /* should be IMGSIZE == 65040 */
196 dbg("read %d bytes fingerprint data", bytes_read);
200 static inline void idmouse_delete(struct usb_idmouse *dev)
202 kfree(dev->bulk_in_buffer);
206 static int idmouse_open(struct inode *inode, struct file *file)
208 struct usb_idmouse *dev;
209 struct usb_interface *interface;
212 /* get the interface from minor number and driver information */
213 interface = usb_find_interface (&idmouse_driver, iminor (inode));
217 mutex_lock(&open_disc_mutex);
218 /* get the device information block from the interface */
219 dev = usb_get_intfdata(interface);
221 mutex_unlock(&open_disc_mutex);
225 /* lock this device */
226 mutex_lock(&dev->lock);
227 mutex_unlock(&open_disc_mutex);
229 /* check if already open */
232 /* already open, so fail */
237 /* create a new image and check for success */
238 result = idmouse_create_image (dev);
242 /* increment our usage count for the driver */
245 /* save our object in the file's private structure */
246 file->private_data = dev;
252 /* unlock this device */
253 mutex_unlock(&dev->lock);
257 static int idmouse_release(struct inode *inode, struct file *file)
259 struct usb_idmouse *dev;
261 dev = file->private_data;
266 mutex_lock(&open_disc_mutex);
267 /* lock our device */
268 mutex_lock(&dev->lock);
270 /* are we really open? */
271 if (dev->open <= 0) {
272 mutex_unlock(&dev->lock);
273 mutex_unlock(&open_disc_mutex);
280 /* the device was unplugged before the file was released */
281 mutex_unlock(&dev->lock);
282 mutex_unlock(&open_disc_mutex);
285 mutex_unlock(&dev->lock);
286 mutex_unlock(&open_disc_mutex);
291 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
294 struct usb_idmouse *dev = file->private_data;
297 /* lock this object */
298 mutex_lock(&dev->lock);
300 /* verify that the device wasn't unplugged */
302 mutex_unlock(&dev->lock);
306 result = simple_read_from_buffer(buffer, count, ppos,
307 dev->bulk_in_buffer, IMGSIZE);
308 /* unlock the device */
309 mutex_unlock(&dev->lock);
313 static int idmouse_probe(struct usb_interface *interface,
314 const struct usb_device_id *id)
316 struct usb_device *udev = interface_to_usbdev(interface);
317 struct usb_idmouse *dev;
318 struct usb_host_interface *iface_desc;
319 struct usb_endpoint_descriptor *endpoint;
322 /* check if we have gotten the data or the hid interface */
323 iface_desc = &interface->altsetting[0];
324 if (iface_desc->desc.bInterfaceClass != 0x0A)
327 /* allocate memory for our device state and initialize it */
328 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
332 mutex_init(&dev->lock);
334 dev->interface = interface;
336 /* set up the endpoint information - use only the first bulk-in endpoint */
337 endpoint = &iface_desc->endpoint[0].desc;
338 if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) {
339 /* we found a bulk in endpoint */
340 dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize);
341 dev->bulk_in_size = 0x200; /* works _much_ faster */
342 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
343 dev->bulk_in_buffer =
344 kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
346 if (!dev->bulk_in_buffer) {
347 err("Unable to allocate input buffer.");
353 if (!(dev->bulk_in_endpointAddr)) {
354 err("Unable to find bulk-in endpoint.");
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 err("Unble to allocate minor number.");
367 usb_set_intfdata(interface, NULL);
373 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
378 static void idmouse_disconnect(struct usb_interface *interface)
380 struct usb_idmouse *dev;
382 /* get device structure */
383 dev = usb_get_intfdata(interface);
385 /* give back our minor */
386 usb_deregister_dev(interface, &idmouse_class);
388 mutex_lock(&open_disc_mutex);
389 usb_set_intfdata(interface, NULL);
390 /* lock the device */
391 mutex_lock(&dev->lock);
392 mutex_unlock(&open_disc_mutex);
394 /* prevent device read, write and ioctl */
397 /* if the device is opened, idmouse_release will clean this up */
399 mutex_unlock(&dev->lock);
403 mutex_unlock(&dev->lock);
406 info("%s disconnected", DRIVER_DESC);
409 static int __init usb_idmouse_init(void)
413 info(DRIVER_DESC " " DRIVER_VERSION);
415 /* register this driver with the USB subsystem */
416 result = usb_register(&idmouse_driver);
418 err("Unable to register device (error %d).", result);
423 static void __exit usb_idmouse_exit(void)
425 /* deregister this driver with the USB subsystem */
426 usb_deregister(&idmouse_driver);
429 module_init(usb_idmouse_init);
430 module_exit(usb_idmouse_exit);
432 MODULE_AUTHOR(DRIVER_AUTHOR);
433 MODULE_DESCRIPTION(DRIVER_DESC);
434 MODULE_LICENSE("GPL");