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/config.h>
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/delay.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/module.h>
26 #include <linux/smp_lock.h>
27 #include <linux/completion.h>
28 #include <linux/mutex.h>
29 #include <asm/uaccess.h>
30 #include <linux/usb.h>
35 #define HEADER "P5 225 289 255 "
36 #define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
38 /* version information */
39 #define DRIVER_VERSION "0.6"
40 #define DRIVER_SHORT "idmouse"
41 #define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>"
42 #define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
44 /* minor number for misc USB devices */
45 #define USB_IDMOUSE_MINOR_BASE 132
47 /* vendor and device IDs */
48 #define ID_SIEMENS 0x0681
49 #define ID_IDMOUSE 0x0005
50 #define ID_CHERRY 0x0010
53 static struct usb_device_id idmouse_table[] = {
54 {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
55 {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
56 {} /* terminating null entry */
60 #define FTIP_RESET 0x20
61 #define FTIP_ACQUIRE 0x21
62 #define FTIP_RELEASE 0x22
63 #define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
64 #define FTIP_SCROLL 0x24
66 #define ftip_command(dev, command, value, index) \
67 usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
68 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
70 MODULE_DEVICE_TABLE(usb, idmouse_table);
72 /* structure to hold all of our device specific stuff */
75 struct usb_device *udev; /* save off the usb device pointer */
76 struct usb_interface *interface; /* the interface for this device */
78 unsigned char *bulk_in_buffer; /* the buffer to receive data */
79 size_t bulk_in_size; /* the maximum bulk packet size */
80 size_t orig_bi_size; /* same as above, but reported by the device */
81 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
83 int open; /* if the port is open or not */
84 int present; /* if the device is not disconnected */
85 struct semaphore sem; /* locks this structure */
89 /* local function prototypes */
90 static ssize_t idmouse_read(struct file *file, char __user *buffer,
91 size_t count, loff_t * ppos);
93 static int idmouse_open(struct inode *inode, struct file *file);
94 static int idmouse_release(struct inode *inode, struct file *file);
96 static int idmouse_probe(struct usb_interface *interface,
97 const struct usb_device_id *id);
99 static void idmouse_disconnect(struct usb_interface *interface);
101 /* file operation pointers */
102 static struct file_operations idmouse_fops = {
103 .owner = THIS_MODULE,
104 .read = idmouse_read,
105 .open = idmouse_open,
106 .release = idmouse_release,
109 /* class driver information */
110 static struct usb_class_driver idmouse_class = {
112 .fops = &idmouse_fops,
113 .minor_base = USB_IDMOUSE_MINOR_BASE,
116 /* usb specific object needed to register this driver with the usb subsystem */
117 static struct usb_driver idmouse_driver = {
118 .name = DRIVER_SHORT,
119 .probe = idmouse_probe,
120 .disconnect = idmouse_disconnect,
121 .id_table = idmouse_table,
124 /* prevent races between open() and disconnect() */
125 static DEFINE_MUTEX(disconnect_mutex);
127 static int idmouse_create_image(struct usb_idmouse *dev)
133 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
134 bytes_read += sizeof(HEADER)-1;
136 /* reset the device and set a fast blink rate */
137 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
140 result = ftip_command(dev, FTIP_BLINK, 1, 0);
144 /* initialize the sensor - sending this command twice */
145 /* significantly reduces the rate of failed reads */
146 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
149 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
153 /* start the readout - sending this command twice */
154 /* presumably enables the high dynamic range mode */
155 result = ftip_command(dev, FTIP_RESET, 0, 0);
158 result = ftip_command(dev, FTIP_RESET, 0, 0);
162 /* loop over a blocking bulk read to get data from the device */
163 while (bytes_read < IMGSIZE) {
164 result = usb_bulk_msg (dev->udev,
165 usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
166 dev->bulk_in_buffer + bytes_read,
167 dev->bulk_in_size, &bulk_read, 5000);
169 /* Maybe this error was caused by the increased packet size? */
170 /* Reset to the original value and tell userspace to retry. */
171 if (dev->bulk_in_size != dev->orig_bi_size) {
172 dev->bulk_in_size = dev->orig_bi_size;
177 if (signal_pending(current)) {
181 bytes_read += bulk_read;
184 /* reset the device */
186 ftip_command(dev, FTIP_RELEASE, 0, 0);
188 /* check for valid image */
189 /* right border should be black (0x00) */
190 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
191 if (dev->bulk_in_buffer[bytes_read] != 0x00)
194 /* lower border should be white (0xFF) */
195 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
196 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
199 /* should be IMGSIZE == 65040 */
200 dbg("read %d bytes fingerprint data", bytes_read);
204 static inline void idmouse_delete(struct usb_idmouse *dev)
206 kfree(dev->bulk_in_buffer);
210 static int idmouse_open(struct inode *inode, struct file *file)
212 struct usb_idmouse *dev = NULL;
213 struct usb_interface *interface;
216 /* prevent disconnects */
217 mutex_lock(&disconnect_mutex);
219 /* get the interface from minor number and driver information */
220 interface = usb_find_interface (&idmouse_driver, iminor (inode));
222 mutex_unlock(&disconnect_mutex);
225 /* get the device information block from the interface */
226 dev = usb_get_intfdata(interface);
228 mutex_unlock(&disconnect_mutex);
232 /* lock this device */
235 /* check if already open */
238 /* already open, so fail */
243 /* create a new image and check for success */
244 result = idmouse_create_image (dev);
248 /* increment our usage count for the driver */
251 /* save our object in the file's private structure */
252 file->private_data = dev;
258 /* unlock this device */
261 /* unlock the disconnect semaphore */
262 mutex_unlock(&disconnect_mutex);
266 static int idmouse_release(struct inode *inode, struct file *file)
268 struct usb_idmouse *dev;
270 /* prevent a race condition with open() */
271 mutex_lock(&disconnect_mutex);
273 dev = (struct usb_idmouse *) file->private_data;
276 mutex_unlock(&disconnect_mutex);
280 /* lock our device */
283 /* are we really open? */
284 if (dev->open <= 0) {
286 mutex_unlock(&disconnect_mutex);
293 /* the device was unplugged before the file was released */
296 mutex_unlock(&disconnect_mutex);
301 mutex_unlock(&disconnect_mutex);
305 static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
308 struct usb_idmouse *dev;
311 dev = (struct usb_idmouse *) file->private_data;
313 /* lock this object */
316 /* verify that the device wasn't unplugged */
322 result = simple_read_from_buffer(buffer, count, ppos,
323 dev->bulk_in_buffer, IMGSIZE);
324 /* unlock the device */
329 static int idmouse_probe(struct usb_interface *interface,
330 const struct usb_device_id *id)
332 struct usb_device *udev = interface_to_usbdev(interface);
333 struct usb_idmouse *dev = NULL;
334 struct usb_host_interface *iface_desc;
335 struct usb_endpoint_descriptor *endpoint;
338 /* check if we have gotten the data or the hid interface */
339 iface_desc = &interface->altsetting[0];
340 if (iface_desc->desc.bInterfaceClass != 0x0A)
343 /* allocate memory for our device state and initialize it */
344 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
348 init_MUTEX(&dev->sem);
350 dev->interface = interface;
352 /* set up the endpoint information - use only the first bulk-in endpoint */
353 endpoint = &iface_desc->endpoint[0].desc;
354 if (!dev->bulk_in_endpointAddr
355 && (endpoint->bEndpointAddress & USB_DIR_IN)
356 && ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
357 USB_ENDPOINT_XFER_BULK)) {
359 /* we found a bulk in endpoint */
360 dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize);
361 dev->bulk_in_size = 0x200; /* works _much_ faster */
362 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
363 dev->bulk_in_buffer =
364 kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
366 if (!dev->bulk_in_buffer) {
367 err("Unable to allocate input buffer.");
373 if (!(dev->bulk_in_endpointAddr)) {
374 err("Unable to find bulk-in endpoint.");
378 /* allow device read, write and ioctl */
381 /* we can register the device now, as it is ready */
382 usb_set_intfdata(interface, dev);
383 result = usb_register_dev(interface, &idmouse_class);
385 /* something prevented us from registering this device */
386 err("Unble to allocate minor number.");
387 usb_set_intfdata(interface, NULL);
393 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
398 static void idmouse_disconnect(struct usb_interface *interface)
400 struct usb_idmouse *dev;
402 /* prevent races with open() */
403 mutex_lock(&disconnect_mutex);
405 /* get device structure */
406 dev = usb_get_intfdata(interface);
407 usb_set_intfdata(interface, NULL);
412 /* give back our minor */
413 usb_deregister_dev(interface, &idmouse_class);
415 /* prevent device read, write and ioctl */
421 /* if the device is opened, idmouse_release will clean this up */
425 mutex_unlock(&disconnect_mutex);
427 info("%s disconnected", DRIVER_DESC);
430 static int __init usb_idmouse_init(void)
434 info(DRIVER_DESC " " DRIVER_VERSION);
436 /* register this driver with the USB subsystem */
437 result = usb_register(&idmouse_driver);
439 err("Unable to register device (error %d).", result);
444 static void __exit usb_idmouse_exit(void)
446 /* deregister this driver with the USB subsystem */
447 usb_deregister(&idmouse_driver);
450 module_init(usb_idmouse_init);
451 module_exit(usb_idmouse_exit);
453 MODULE_AUTHOR(DRIVER_AUTHOR);
454 MODULE_DESCRIPTION(DRIVER_DESC);
455 MODULE_LICENSE("GPL");