Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 1 | /* Siemens ID Mouse driver v0.6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | |
| 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. |
| 7 | |
| 8 | Copyright (C) 2004-5 by Florian 'Floe' Echtler <echtler@fs.tum.de> |
| 9 | and Andreas 'ad' Deresch <aderesch@fs.tum.de> |
| 10 | |
| 11 | Derived from the USB Skeleton driver 1.1, |
| 12 | Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com) |
| 13 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 14 | Additional information provided by Martin Reising |
| 15 | <Martin.Reising@natural-computing.de> |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/completion.h> |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/uaccess.h> |
| 28 | #include <linux/usb.h> |
| 29 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 30 | /* image constants */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #define WIDTH 225 |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 32 | #define HEIGHT 289 |
| 33 | #define HEADER "P5 225 289 255 " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1) |
| 35 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 36 | /* version information */ |
| 37 | #define DRIVER_VERSION "0.6" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
| 41 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 42 | /* minor number for misc USB devices */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define USB_IDMOUSE_MINOR_BASE 132 |
| 44 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 45 | /* vendor and device IDs */ |
| 46 | #define ID_SIEMENS 0x0681 |
| 47 | #define ID_IDMOUSE 0x0005 |
| 48 | #define ID_CHERRY 0x0010 |
| 49 | |
| 50 | /* device ID table */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | static struct usb_device_id idmouse_table[] = { |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | }; |
| 56 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 57 | /* sensor commands */ |
| 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 |
| 63 | |
| 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) |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | MODULE_DEVICE_TABLE(usb, idmouse_table); |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 69 | static DEFINE_MUTEX(open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | /* structure to hold all of our device specific stuff */ |
| 72 | struct usb_idmouse { |
| 73 | |
| 74 | struct usb_device *udev; /* save off the usb device pointer */ |
| 75 | struct usb_interface *interface; /* the interface for this device */ |
| 76 | |
| 77 | unsigned char *bulk_in_buffer; /* the buffer to receive data */ |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */ |
| 81 | |
| 82 | int open; /* if the port is open or not */ |
| 83 | int present; /* if the device is not disconnected */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 84 | struct mutex lock; /* locks this structure */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | }; |
| 87 | |
| 88 | /* local function prototypes */ |
| 89 | static ssize_t idmouse_read(struct file *file, char __user *buffer, |
| 90 | size_t count, loff_t * ppos); |
| 91 | |
| 92 | static int idmouse_open(struct inode *inode, struct file *file); |
| 93 | static int idmouse_release(struct inode *inode, struct file *file); |
| 94 | |
| 95 | static int idmouse_probe(struct usb_interface *interface, |
| 96 | const struct usb_device_id *id); |
| 97 | |
| 98 | static void idmouse_disconnect(struct usb_interface *interface); |
| 99 | |
| 100 | /* file operation pointers */ |
Luiz Fernando N. Capitulino | 066202d | 2006-08-05 20:37:11 -0300 | [diff] [blame] | 101 | static const struct file_operations idmouse_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | .owner = THIS_MODULE, |
| 103 | .read = idmouse_read, |
| 104 | .open = idmouse_open, |
| 105 | .release = idmouse_release, |
| 106 | }; |
| 107 | |
Greg Kroah-Hartman | d6e5bcf | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 108 | /* class driver information */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | static struct usb_class_driver idmouse_class = { |
Greg Kroah-Hartman | d6e5bcf | 2005-06-20 21:15:16 -0700 | [diff] [blame] | 110 | .name = "idmouse%d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | .fops = &idmouse_fops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | .minor_base = USB_IDMOUSE_MINOR_BASE, |
| 113 | }; |
| 114 | |
| 115 | /* usb specific object needed to register this driver with the usb subsystem */ |
| 116 | static struct usb_driver idmouse_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | .name = DRIVER_SHORT, |
| 118 | .probe = idmouse_probe, |
| 119 | .disconnect = idmouse_disconnect, |
| 120 | .id_table = idmouse_table, |
| 121 | }; |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static int idmouse_create_image(struct usb_idmouse *dev) |
| 124 | { |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 125 | int bytes_read; |
| 126 | int bulk_read; |
| 127 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 129 | memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1); |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 130 | bytes_read = sizeof(HEADER)-1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 132 | /* reset the device and set a fast blink rate */ |
| 133 | result = ftip_command(dev, FTIP_RELEASE, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | if (result < 0) |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 135 | goto reset; |
| 136 | result = ftip_command(dev, FTIP_BLINK, 1, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (result < 0) |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 138 | goto reset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | if (result < 0) |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 144 | goto reset; |
| 145 | result = ftip_command(dev, FTIP_ACQUIRE, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | if (result < 0) |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 147 | goto reset; |
| 148 | |
| 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (result < 0) |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 153 | goto reset; |
| 154 | result = ftip_command(dev, FTIP_RESET, 0, 0); |
| 155 | if (result < 0) |
| 156 | goto reset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 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); |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 164 | if (result < 0) { |
| 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; |
| 169 | result = -EAGAIN; |
| 170 | } |
| 171 | break; |
| 172 | } |
| 173 | if (signal_pending(current)) { |
| 174 | result = -EINTR; |
| 175 | break; |
| 176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | bytes_read += bulk_read; |
| 178 | } |
| 179 | |
| 180 | /* reset the device */ |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 181 | reset: |
| 182 | ftip_command(dev, FTIP_RELEASE, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 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) |
| 188 | return -EAGAIN; |
| 189 | |
| 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) |
| 193 | return -EAGAIN; |
| 194 | |
| 195 | /* should be IMGSIZE == 65040 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | dbg("read %d bytes fingerprint data", bytes_read); |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 197 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static inline void idmouse_delete(struct usb_idmouse *dev) |
| 201 | { |
| 202 | kfree(dev->bulk_in_buffer); |
| 203 | kfree(dev); |
| 204 | } |
| 205 | |
| 206 | static int idmouse_open(struct inode *inode, struct file *file) |
| 207 | { |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 208 | struct usb_idmouse *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | struct usb_interface *interface; |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 210 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | /* get the interface from minor number and driver information */ |
| 213 | interface = usb_find_interface (&idmouse_driver, iminor (inode)); |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 214 | if (!interface) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return -ENODEV; |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 216 | |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 217 | mutex_lock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | /* get the device information block from the interface */ |
| 219 | dev = usb_get_intfdata(interface); |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 220 | if (!dev) { |
| 221 | mutex_unlock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return -ENODEV; |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 223 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | /* lock this device */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 226 | mutex_lock(&dev->lock); |
| 227 | mutex_unlock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | |
| 229 | /* check if already open */ |
| 230 | if (dev->open) { |
| 231 | |
| 232 | /* already open, so fail */ |
| 233 | result = -EBUSY; |
| 234 | |
| 235 | } else { |
| 236 | |
| 237 | /* create a new image and check for success */ |
| 238 | result = idmouse_create_image (dev); |
| 239 | if (result) |
| 240 | goto error; |
| 241 | |
| 242 | /* increment our usage count for the driver */ |
| 243 | ++dev->open; |
| 244 | |
| 245 | /* save our object in the file's private structure */ |
| 246 | file->private_data = dev; |
| 247 | |
| 248 | } |
| 249 | |
| 250 | error: |
| 251 | |
| 252 | /* unlock this device */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 253 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | return result; |
| 255 | } |
| 256 | |
| 257 | static int idmouse_release(struct inode *inode, struct file *file) |
| 258 | { |
| 259 | struct usb_idmouse *dev; |
| 260 | |
Tobias Klauser | 4727810 | 2006-12-20 11:42:12 +0100 | [diff] [blame] | 261 | dev = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 263 | if (dev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 266 | mutex_lock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | /* lock our device */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 268 | mutex_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | /* are we really open? */ |
| 271 | if (dev->open <= 0) { |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 272 | mutex_unlock(&dev->lock); |
| 273 | mutex_unlock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | return -ENODEV; |
| 275 | } |
| 276 | |
| 277 | --dev->open; |
| 278 | |
| 279 | if (!dev->present) { |
| 280 | /* the device was unplugged before the file was released */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 281 | mutex_unlock(&dev->lock); |
| 282 | mutex_unlock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | idmouse_delete(dev); |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 284 | } else { |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 285 | mutex_unlock(&dev->lock); |
| 286 | mutex_unlock(&open_disc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count, |
| 292 | loff_t * ppos) |
| 293 | { |
Tobias Klauser | 4727810 | 2006-12-20 11:42:12 +0100 | [diff] [blame] | 294 | struct usb_idmouse *dev = file->private_data; |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 295 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 297 | /* lock this object */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 298 | mutex_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 300 | /* verify that the device wasn't unplugged */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | if (!dev->present) { |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 302 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | return -ENODEV; |
| 304 | } |
| 305 | |
Al Viro | 018a2cd | 2005-10-29 11:56:13 +0100 | [diff] [blame] | 306 | result = simple_read_from_buffer(buffer, count, ppos, |
| 307 | dev->bulk_in_buffer, IMGSIZE); |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 308 | /* unlock the device */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 309 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return result; |
| 311 | } |
| 312 | |
| 313 | static int idmouse_probe(struct usb_interface *interface, |
| 314 | const struct usb_device_id *id) |
| 315 | { |
| 316 | struct usb_device *udev = interface_to_usbdev(interface); |
Mariusz Kozlowski | 54ecf1f | 2006-11-06 17:37:20 +0100 | [diff] [blame] | 317 | struct usb_idmouse *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | struct usb_host_interface *iface_desc; |
| 319 | struct usb_endpoint_descriptor *endpoint; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | int result; |
| 321 | |
| 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) |
| 325 | return -ENODEV; |
| 326 | |
| 327 | /* allocate memory for our device state and initialize it */ |
Oliver Neukum | 092e462 | 2006-01-06 22:36:27 +0100 | [diff] [blame] | 328 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (dev == NULL) |
| 330 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 332 | mutex_init(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | dev->udev = udev; |
| 334 | dev->interface = interface; |
| 335 | |
| 336 | /* set up the endpoint information - use only the first bulk-in endpoint */ |
| 337 | endpoint = &iface_desc->endpoint[0].desc; |
Luiz Fernando N. Capitulino | a7dc218 | 2006-10-26 13:02:52 -0300 | [diff] [blame] | 338 | if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* we found a bulk in endpoint */ |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 340 | dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 341 | dev->bulk_in_size = 0x200; /* works _much_ faster */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; |
| 343 | dev->bulk_in_buffer = |
Florian Echtler | 4244f72 | 2005-05-06 19:05:39 +0200 | [diff] [blame] | 344 | kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
| 346 | if (!dev->bulk_in_buffer) { |
| 347 | err("Unable to allocate input buffer."); |
| 348 | idmouse_delete(dev); |
| 349 | return -ENOMEM; |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if (!(dev->bulk_in_endpointAddr)) { |
| 354 | err("Unable to find bulk-in endpoint."); |
| 355 | idmouse_delete(dev); |
| 356 | return -ENODEV; |
| 357 | } |
| 358 | /* allow device read, write and ioctl */ |
| 359 | dev->present = 1; |
| 360 | |
| 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); |
| 364 | if (result) { |
| 365 | /* something prevented us from registering this device */ |
| 366 | err("Unble to allocate minor number."); |
| 367 | usb_set_intfdata(interface, NULL); |
| 368 | idmouse_delete(dev); |
| 369 | return result; |
| 370 | } |
| 371 | |
| 372 | /* be noisy */ |
| 373 | dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC); |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static void idmouse_disconnect(struct usb_interface *interface) |
| 379 | { |
| 380 | struct usb_idmouse *dev; |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /* get device structure */ |
| 383 | dev = usb_get_intfdata(interface); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | /* give back our minor */ |
| 386 | usb_deregister_dev(interface, &idmouse_class); |
| 387 | |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 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); |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /* prevent device read, write and ioctl */ |
| 395 | dev->present = 0; |
| 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | /* if the device is opened, idmouse_release will clean this up */ |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 398 | if (!dev->open) { |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 399 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | idmouse_delete(dev); |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 401 | } else { |
| 402 | /* unlock */ |
Oliver Neukum | 54d2bc0 | 2007-10-23 14:23:13 +0200 | [diff] [blame] | 403 | mutex_unlock(&dev->lock); |
Alan Stern | d4ead16 | 2007-05-22 11:46:41 -0400 | [diff] [blame] | 404 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Greg Kroah-Hartman | 1b29a37 | 2008-08-18 13:21:04 -0700 | [diff] [blame^] | 406 | dev_info(&interface->dev, "disconnected\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | static int __init usb_idmouse_init(void) |
| 410 | { |
| 411 | int result; |
| 412 | |
Greg Kroah-Hartman | 1b29a37 | 2008-08-18 13:21:04 -0700 | [diff] [blame^] | 413 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| 414 | DRIVER_DESC "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
| 416 | /* register this driver with the USB subsystem */ |
| 417 | result = usb_register(&idmouse_driver); |
| 418 | if (result) |
| 419 | err("Unable to register device (error %d).", result); |
| 420 | |
| 421 | return result; |
| 422 | } |
| 423 | |
| 424 | static void __exit usb_idmouse_exit(void) |
| 425 | { |
| 426 | /* deregister this driver with the USB subsystem */ |
| 427 | usb_deregister(&idmouse_driver); |
| 428 | } |
| 429 | |
| 430 | module_init(usb_idmouse_init); |
| 431 | module_exit(usb_idmouse_exit); |
| 432 | |
| 433 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 434 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 435 | MODULE_LICENSE("GPL"); |
| 436 | |