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);
70 /* structure to hold all of our device specific stuff */
73 struct usb_device *udev; /* save off the usb device pointer */
74 struct usb_interface *interface; /* the interface for this device */
76 unsigned char *bulk_in_buffer; /* the buffer to receive data */
77 size_t bulk_in_size; /* the maximum bulk packet size */
78 size_t orig_bi_size; /* same as above, but reported by the device */
79 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
81 int open; /* if the port is open or not */
82 int present; /* if the device is not disconnected */
83 struct semaphore sem; /* locks this structure */
87 /* local function prototypes */
88 static ssize_t idmouse_read(struct file *file, char __user *buffer,
89 size_t count, loff_t * ppos);
91 static int idmouse_open(struct inode *inode, struct file *file);
92 static int idmouse_release(struct inode *inode, struct file *file);
94 static int idmouse_probe(struct usb_interface *interface,
95 const struct usb_device_id *id);
97 static void idmouse_disconnect(struct usb_interface *interface);
99 /* file operation pointers */
100 static const struct file_operations idmouse_fops = {
101 .owner = THIS_MODULE,
102 .read = idmouse_read,
103 .open = idmouse_open,
104 .release = idmouse_release,
107 /* class driver information */
108 static struct usb_class_driver idmouse_class = {
110 .fops = &idmouse_fops,
111 .minor_base = USB_IDMOUSE_MINOR_BASE,
114 /* usb specific object needed to register this driver with the usb subsystem */
115 static struct usb_driver idmouse_driver = {
116 .name = DRIVER_SHORT,
117 .probe = idmouse_probe,
118 .disconnect = idmouse_disconnect,
119 .id_table = idmouse_table,
122 /* prevent races between open() and disconnect() */
123 static DEFINE_MUTEX(disconnect_mutex);
125 static int idmouse_create_image(struct usb_idmouse *dev)
131 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
132 bytes_read = sizeof(HEADER)-1;
134 /* reset the device and set a fast blink rate */
135 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
138 result = ftip_command(dev, FTIP_BLINK, 1, 0);
142 /* initialize the sensor - sending this command twice */
143 /* significantly reduces the rate of failed reads */
144 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
147 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
151 /* start the readout - sending this command twice */
152 /* presumably enables the high dynamic range mode */
153 result = ftip_command(dev, FTIP_RESET, 0, 0);
156 result = ftip_command(dev, FTIP_RESET, 0, 0);
160 /* loop over a blocking bulk read to get data from the device */
161 while (bytes_read < IMGSIZE) {
162 result = usb_bulk_msg (dev->udev,
163 usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
164 dev->bulk_in_buffer + bytes_read,
165 dev->bulk_in_size, &bulk_read, 5000);
167 /* Maybe this error was caused by the increased packet size? */
168 /* Reset to the original value and tell userspace to retry. */
169 if (dev->bulk_in_size != dev->orig_bi_size) {
170 dev->bulk_in_size = dev->orig_bi_size;
175 if (signal_pending(current)) {
179 bytes_read += bulk_read;
182 /* reset the device */
184 ftip_command(dev, FTIP_RELEASE, 0, 0);
186 /* check for valid image */
187 /* right border should be black (0x00) */
188 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
189 if (dev->bulk_in_buffer[bytes_read] != 0x00)
192 /* lower border should be white (0xFF) */
193 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
194 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
197 /* should be IMGSIZE == 65040 */
198 dbg("read %d bytes fingerprint data", bytes_read);
202 static inline void idmouse_delete(struct usb_idmouse *dev)
204 kfree(dev->bulk_in_buffer);
208 static int idmouse_open(struct inode *inode, struct file *file)
210 struct usb_idmouse *dev;
211 struct usb_interface *interface;
214 /* prevent disconnects */
215 mutex_lock(&disconnect_mutex);
217 /* get the interface from minor number and driver information */
218 interface = usb_find_interface (&idmouse_driver, iminor (inode));
220 mutex_unlock(&disconnect_mutex);
223 /* get the device information block from the interface */
224 dev = usb_get_intfdata(interface);
226 mutex_unlock(&disconnect_mutex);
230 /* lock this device */
233 /* check if already open */
236 /* already open, so fail */
241 /* create a new image and check for success */
242 result = idmouse_create_image (dev);
246 /* increment our usage count for the driver */
249 /* save our object in the file's private structure */
250 file->private_data = dev;
256 /* unlock this device */
259 /* unlock the disconnect semaphore */
260 mutex_unlock(&disconnect_mutex);
264 static int idmouse_release(struct inode *inode, struct file *file)
266 struct usb_idmouse *dev;
268 /* prevent a race condition with open() */
269 mutex_lock(&disconnect_mutex);
271 dev = file->private_data;
274 mutex_unlock(&disconnect_mutex);
278 /* lock our device */
281 /* are we really open? */
282 if (dev->open <= 0) {
284 mutex_unlock(&disconnect_mutex);
291 /* the device was unplugged before the file was released */
294 mutex_unlock(&disconnect_mutex);
299 mutex_unlock(&disconnect_mutex);
303 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
306 struct usb_idmouse *dev = file->private_data;
309 /* lock this object */
312 /* verify that the device wasn't unplugged */
318 result = simple_read_from_buffer(buffer, count, ppos,
319 dev->bulk_in_buffer, IMGSIZE);
320 /* unlock the device */
325 static int idmouse_probe(struct usb_interface *interface,
326 const struct usb_device_id *id)
328 struct usb_device *udev = interface_to_usbdev(interface);
329 struct usb_idmouse *dev;
330 struct usb_host_interface *iface_desc;
331 struct usb_endpoint_descriptor *endpoint;
334 /* check if we have gotten the data or the hid interface */
335 iface_desc = &interface->altsetting[0];
336 if (iface_desc->desc.bInterfaceClass != 0x0A)
339 /* allocate memory for our device state and initialize it */
340 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
344 init_MUTEX(&dev->sem);
346 dev->interface = interface;
348 /* set up the endpoint information - use only the first bulk-in endpoint */
349 endpoint = &iface_desc->endpoint[0].desc;
350 if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) {
351 /* we found a bulk in endpoint */
352 dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize);
353 dev->bulk_in_size = 0x200; /* works _much_ faster */
354 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
355 dev->bulk_in_buffer =
356 kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
358 if (!dev->bulk_in_buffer) {
359 err("Unable to allocate input buffer.");
365 if (!(dev->bulk_in_endpointAddr)) {
366 err("Unable to find bulk-in endpoint.");
370 /* allow device read, write and ioctl */
373 /* we can register the device now, as it is ready */
374 usb_set_intfdata(interface, dev);
375 result = usb_register_dev(interface, &idmouse_class);
377 /* something prevented us from registering this device */
378 err("Unble to allocate minor number.");
379 usb_set_intfdata(interface, NULL);
385 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
390 static void idmouse_disconnect(struct usb_interface *interface)
392 struct usb_idmouse *dev;
394 /* prevent races with open() */
395 mutex_lock(&disconnect_mutex);
397 /* get device structure */
398 dev = usb_get_intfdata(interface);
399 usb_set_intfdata(interface, NULL);
404 /* give back our minor */
405 usb_deregister_dev(interface, &idmouse_class);
407 /* prevent device read, write and ioctl */
413 /* if the device is opened, idmouse_release will clean this up */
417 mutex_unlock(&disconnect_mutex);
419 info("%s disconnected", DRIVER_DESC);
422 static int __init usb_idmouse_init(void)
426 info(DRIVER_DESC " " DRIVER_VERSION);
428 /* register this driver with the USB subsystem */
429 result = usb_register(&idmouse_driver);
431 err("Unable to register device (error %d).", result);
436 static void __exit usb_idmouse_exit(void)
438 /* deregister this driver with the USB subsystem */
439 usb_deregister(&idmouse_driver);
442 module_init(usb_idmouse_init);
443 module_exit(usb_idmouse_exit);
445 MODULE_AUTHOR(DRIVER_AUTHOR);
446 MODULE_DESCRIPTION(DRIVER_DESC);
447 MODULE_LICENSE("GPL");