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/smp_lock.h>
26 #include <linux/completion.h>
27 #include <linux/mutex.h>
28 #include <asm/uaccess.h>
29 #include <linux/usb.h>
34 #define HEADER "P5 225 289 255 "
35 #define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
37 /* version information */
38 #define DRIVER_VERSION "0.6"
39 #define DRIVER_SHORT "idmouse"
40 #define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>"
41 #define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
43 /* minor number for misc USB devices */
44 #define USB_IDMOUSE_MINOR_BASE 132
46 /* vendor and device IDs */
47 #define ID_SIEMENS 0x0681
48 #define ID_IDMOUSE 0x0005
49 #define ID_CHERRY 0x0010
52 static struct usb_device_id idmouse_table[] = {
53 {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
54 {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
55 {} /* terminating null entry */
59 #define FTIP_RESET 0x20
60 #define FTIP_ACQUIRE 0x21
61 #define FTIP_RELEASE 0x22
62 #define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
63 #define FTIP_SCROLL 0x24
65 #define ftip_command(dev, command, value, index) \
66 usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
67 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
69 MODULE_DEVICE_TABLE(usb, idmouse_table);
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 semaphore sem; /* 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 /* prevent races between open() and disconnect() */
124 static DEFINE_MUTEX(disconnect_mutex);
126 static int idmouse_create_image(struct usb_idmouse *dev)
132 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
133 bytes_read += sizeof(HEADER)-1;
135 /* reset the device and set a fast blink rate */
136 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
139 result = ftip_command(dev, FTIP_BLINK, 1, 0);
143 /* initialize the sensor - sending this command twice */
144 /* significantly reduces the rate of failed reads */
145 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
148 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
152 /* start the readout - sending this command twice */
153 /* presumably enables the high dynamic range mode */
154 result = ftip_command(dev, FTIP_RESET, 0, 0);
157 result = ftip_command(dev, FTIP_RESET, 0, 0);
161 /* loop over a blocking bulk read to get data from the device */
162 while (bytes_read < IMGSIZE) {
163 result = usb_bulk_msg (dev->udev,
164 usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
165 dev->bulk_in_buffer + bytes_read,
166 dev->bulk_in_size, &bulk_read, 5000);
168 /* Maybe this error was caused by the increased packet size? */
169 /* Reset to the original value and tell userspace to retry. */
170 if (dev->bulk_in_size != dev->orig_bi_size) {
171 dev->bulk_in_size = dev->orig_bi_size;
176 if (signal_pending(current)) {
180 bytes_read += bulk_read;
183 /* reset the device */
185 ftip_command(dev, FTIP_RELEASE, 0, 0);
187 /* check for valid image */
188 /* right border should be black (0x00) */
189 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
190 if (dev->bulk_in_buffer[bytes_read] != 0x00)
193 /* lower border should be white (0xFF) */
194 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
195 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
198 /* should be IMGSIZE == 65040 */
199 dbg("read %d bytes fingerprint data", bytes_read);
203 static inline void idmouse_delete(struct usb_idmouse *dev)
205 kfree(dev->bulk_in_buffer);
209 static int idmouse_open(struct inode *inode, struct file *file)
211 struct usb_idmouse *dev = NULL;
212 struct usb_interface *interface;
215 /* prevent disconnects */
216 mutex_lock(&disconnect_mutex);
218 /* get the interface from minor number and driver information */
219 interface = usb_find_interface (&idmouse_driver, iminor (inode));
221 mutex_unlock(&disconnect_mutex);
224 /* get the device information block from the interface */
225 dev = usb_get_intfdata(interface);
227 mutex_unlock(&disconnect_mutex);
231 /* lock this device */
234 /* check if already open */
237 /* already open, so fail */
242 /* create a new image and check for success */
243 result = idmouse_create_image (dev);
247 /* increment our usage count for the driver */
250 /* save our object in the file's private structure */
251 file->private_data = dev;
257 /* unlock this device */
260 /* unlock the disconnect semaphore */
261 mutex_unlock(&disconnect_mutex);
265 static int idmouse_release(struct inode *inode, struct file *file)
267 struct usb_idmouse *dev;
269 /* prevent a race condition with open() */
270 mutex_lock(&disconnect_mutex);
272 dev = (struct usb_idmouse *) file->private_data;
275 mutex_unlock(&disconnect_mutex);
279 /* lock our device */
282 /* are we really open? */
283 if (dev->open <= 0) {
285 mutex_unlock(&disconnect_mutex);
292 /* the device was unplugged before the file was released */
295 mutex_unlock(&disconnect_mutex);
300 mutex_unlock(&disconnect_mutex);
304 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
307 struct usb_idmouse *dev;
310 dev = (struct usb_idmouse *) file->private_data;
312 /* lock this object */
315 /* verify that the device wasn't unplugged */
321 result = simple_read_from_buffer(buffer, count, ppos,
322 dev->bulk_in_buffer, IMGSIZE);
323 /* unlock the device */
328 static int idmouse_probe(struct usb_interface *interface,
329 const struct usb_device_id *id)
331 struct usb_device *udev = interface_to_usbdev(interface);
332 struct usb_idmouse *dev = NULL;
333 struct usb_host_interface *iface_desc;
334 struct usb_endpoint_descriptor *endpoint;
337 /* check if we have gotten the data or the hid interface */
338 iface_desc = &interface->altsetting[0];
339 if (iface_desc->desc.bInterfaceClass != 0x0A)
342 /* allocate memory for our device state and initialize it */
343 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
347 init_MUTEX(&dev->sem);
349 dev->interface = interface;
351 /* set up the endpoint information - use only the first bulk-in endpoint */
352 endpoint = &iface_desc->endpoint[0].desc;
353 if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) {
354 /* we found a bulk in endpoint */
355 dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize);
356 dev->bulk_in_size = 0x200; /* works _much_ faster */
357 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
358 dev->bulk_in_buffer =
359 kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
361 if (!dev->bulk_in_buffer) {
362 err("Unable to allocate input buffer.");
368 if (!(dev->bulk_in_endpointAddr)) {
369 err("Unable to find bulk-in endpoint.");
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 err("Unble to allocate minor number.");
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 /* prevent races with open() */
398 mutex_lock(&disconnect_mutex);
400 /* get device structure */
401 dev = usb_get_intfdata(interface);
402 usb_set_intfdata(interface, NULL);
407 /* give back our minor */
408 usb_deregister_dev(interface, &idmouse_class);
410 /* prevent device read, write and ioctl */
416 /* if the device is opened, idmouse_release will clean this up */
420 mutex_unlock(&disconnect_mutex);
422 info("%s disconnected", DRIVER_DESC);
425 static int __init usb_idmouse_init(void)
429 info(DRIVER_DESC " " DRIVER_VERSION);
431 /* register this driver with the USB subsystem */
432 result = usb_register(&idmouse_driver);
434 err("Unable to register device (error %d).", result);
439 static void __exit usb_idmouse_exit(void)
441 /* deregister this driver with the USB subsystem */
442 usb_deregister(&idmouse_driver);
445 module_init(usb_idmouse_init);
446 module_exit(usb_idmouse_exit);
448 MODULE_AUTHOR(DRIVER_AUTHOR);
449 MODULE_DESCRIPTION(DRIVER_DESC);
450 MODULE_LICENSE("GPL");