drivers/usb/misc/phidgetkit.c

   1 /*
   2  * USB PhidgetInterfaceKit driver 1.0
   3  *
   4  * Copyright (C) 2004 Sean Young <sean@mess.org>
   5  * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This is a driver for the USB PhidgetInterfaceKit.
  13  */
  14
  15 #include <linux/config.h>
  16 #include <linux/kernel.h>
  17 #include <linux/errno.h>
  18 #include <linux/init.h>
  19 #include <linux/slab.h>
  20 #include <linux/module.h>
  21 #include <linux/usb.h>
  22
  23 #define DRIVER_AUTHOR "Sean Young <sean@mess.org>"
  24 #define DRIVER_DESC "USB PhidgetInterfaceKit Driver"
  25
  26 #define USB_VENDOR_ID_GLAB              0x06c2
  27 #define USB_DEVICE_ID_INTERFACEKIT004   0x0040
  28 #define USB_DEVICE_ID_INTERFACEKIT888   0x0045
  29 #define USB_DEVICE_ID_INTERFACEKIT047   0x0051
  30 #define USB_DEVICE_ID_INTERFACEKIT088   0x0053
  31
  32 #define USB_VENDOR_ID_WISEGROUP         0x0925
  33 #define USB_DEVICE_ID_INTERFACEKIT884   0x8201
  34
  35 #define MAX_INTERFACES                  8
  36
  37 struct driver_interfacekit {
  38         int sensors;
  39         int inputs;
  40         int outputs;
  41         int has_lcd;
  42 };
  43 #define ifkit(_sensors, _inputs, _outputs, _lcd)                        \
  44 static struct driver_interfacekit ph_##_sensors##_inputs##_outputs = {  \
  45         .sensors        = _sensors,                                     \
  46         .inputs         = _inputs,                                      \
  47         .outputs        = _outputs,                                     \
  48         .has_lcd        = _lcd,                                         \
  49 };
  50 ifkit(0, 0, 4, 0);
  51 ifkit(8, 8, 8, 0);
  52 ifkit(0, 4, 7, 1);
  53 ifkit(8, 8, 4, 0);
  54 ifkit(0, 8, 8, 1);
  55
  56 struct phidget_interfacekit {
  57         struct usb_device *udev;
  58         struct usb_interface *intf;
  59         struct driver_interfacekit *ifkit;
  60         int outputs[MAX_INTERFACES];
  61         int inputs[MAX_INTERFACES];
  62         int sensors[MAX_INTERFACES];
  63         u8 lcd_files_on;
  64
  65         struct urb *irq;
  66         unsigned char *data;
  67         dma_addr_t data_dma;
  68 };
  69
  70 static struct usb_device_id id_table[] = {
  71         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT004),
  72                 .driver_info = (kernel_ulong_t)&ph_004},
  73         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT888),
  74                 .driver_info = (kernel_ulong_t)&ph_888},
  75         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT047),
  76                 .driver_info = (kernel_ulong_t)&ph_047},
  77         {USB_DEVICE(USB_VENDOR_ID_GLAB, USB_DEVICE_ID_INTERFACEKIT088),
  78                 .driver_info = (kernel_ulong_t)&ph_088},
  79         {USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_INTERFACEKIT884),
  80                 .driver_info = (kernel_ulong_t)&ph_884},
  81         {}
  82 };
  83 MODULE_DEVICE_TABLE(usb, id_table);
  84
  85 static int change_outputs(struct phidget_interfacekit *kit, int output_num, int enable)
  86 {
  87         unsigned char *buffer;
  88         int retval;
  89         int n;
  90
  91         buffer = kzalloc(4, GFP_KERNEL);
  92         if (!buffer) {
  93                 dev_err(&kit->udev->dev, "%s - out of memory\n",
  94                         __FUNCTION__);
  95                 return -ENOMEM;
  96         }
  97
  98         kit->outputs[output_num] = enable;
  99         for (n=0; n<8; n++) {
 100                 if (kit->outputs[n]) {
 101                         buffer[0] |= 1 << n;
 102                 }
 103         }
 104
 105         dev_dbg(&kit->udev->dev, "sending data: %02x\n", buffer[0]);
 106
 107         retval = usb_control_msg(kit->udev,
 108                          usb_sndctrlpipe(kit->udev, 0),
 109                          0x09, 0x21, 0x0200, 0x0000, buffer, 4, 2000);
 110
 111         if (retval != 4)
 112                 dev_err(&kit->udev->dev, "usb_control_msg returned %d\n",
 113                                 retval);
 114         kfree(buffer);
 115
 116         return retval < 0 ? retval : 0;
 117 }
 118
 119 static int change_string(struct phidget_interfacekit *kit, const char *display, unsigned char row)
 120 {
 121         unsigned char *buffer;
 122         unsigned char *form_buffer;
 123         int retval = -ENOMEM;
 124         int i,j, len, buf_ptr;
 125
 126         buffer = kmalloc(8, GFP_KERNEL);
 127         form_buffer = kmalloc(30, GFP_KERNEL);
 128         if ((!buffer) || (!form_buffer)) {
 129                 dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
 130                 goto exit;
 131         }
 132
 133         len = strlen(display);
 134         if (len > 20)
 135                 len = 20;
 136
 137         dev_dbg(&kit->udev->dev, "Setting LCD line %d to %s\n", row, display);
 138
 139         form_buffer[0] = row * 0x40 + 0x80;
 140         form_buffer[1] = 0x02;
 141         buf_ptr = 2;
 142         for (i = 0; i<len; i++)
 143                 form_buffer[buf_ptr++] = display[i];
 144
 145         for (i = 0; i < (20 - len); i++)
 146                 form_buffer[buf_ptr++] = 0x20;
 147         form_buffer[buf_ptr++] = 0x01;
 148         form_buffer[buf_ptr++] = row * 0x40 + 0x80 + strlen(display);
 149
 150         for (i = 0; i < buf_ptr; i += 7) {
 151                 if ((buf_ptr - i) > 7)
 152                         len = 7;
 153                 else
 154                         len = (buf_ptr - i);
 155                 for (j = 0; j < len; j++)
 156                         buffer[j] = form_buffer[i + j];
 157                 buffer[7] = len;
 158
 159                 retval = usb_control_msg(kit->udev,
 160                                  usb_sndctrlpipe(kit->udev, 0),
 161                                  0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
 162                 if (retval < 0)
 163                         goto exit;
 164         }
 165
 166         retval = 0;
 167 exit:
 168         kfree(buffer);
 169         kfree(form_buffer);
 170
 171         return retval;
 172 }
 173
 174 #define set_lcd_line(number)    \
 175 static ssize_t lcd_line_##number(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)      \
 176 {                                                                                       \
 177         struct usb_interface *intf = to_usb_interface(dev);                             \
 178         struct phidget_interfacekit *kit = usb_get_intfdata(intf);                      \
 179         change_string(kit, buf, number - 1);                                            \
 180         return count;                                                                   \
 181 }                                                                                       \
 182 static DEVICE_ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number);
 183 set_lcd_line(1);
 184 set_lcd_line(2);
 185
 186 static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 187 {
 188         struct usb_interface *intf = to_usb_interface(dev);
 189         struct phidget_interfacekit *kit = usb_get_intfdata(intf);
 190         int enabled;
 191         unsigned char *buffer;
 192         int retval = -ENOMEM;
 193
 194         buffer = kzalloc(8, GFP_KERNEL);
 195         if (!buffer) {
 196                 dev_err(&kit->udev->dev, "%s - out of memory\n", __FUNCTION__);
 197                 goto exit;
 198         }
 199
 200         if (sscanf(buf, "%d", &enabled) < 1) {
 201                 retval = -EINVAL;
 202                 goto exit;
 203         }
 204         if (enabled)
 205                 buffer[0] = 0x01;
 206         buffer[7] = 0x11;
 207
 208         dev_dbg(&kit->udev->dev, "Setting backlight to %s\n", enabled ? "on" : "off");
 209
 210         retval = usb_control_msg(kit->udev,
 211                          usb_sndctrlpipe(kit->udev, 0),
 212                          0x09, 0x21, 0x0200, 0x0000, buffer, 8, 2000);
 213         if (retval < 0)
 214                 goto exit;
 215
 216         retval = count;
 217 exit:
 218         kfree(buffer);
 219         return retval;
 220 }
 221 static DEVICE_ATTR(backlight, S_IWUGO, NULL, set_backlight);
 222
 223 static void remove_lcd_files(struct phidget_interfacekit *kit)
 224 {
 225         if (kit->lcd_files_on) {
 226                 dev_dbg(&kit->udev->dev, "Removing lcd files\n");
 227                 device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_1);
 228                 device_remove_file(&kit->intf->dev, &dev_attr_lcd_line_2);
 229                 device_remove_file(&kit->intf->dev, &dev_attr_backlight);
 230         }
 231 }
 232
 233 static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 234 {
 235         struct usb_interface *intf = to_usb_interface(dev);
 236         struct phidget_interfacekit *kit = usb_get_intfdata(intf);
 237         int enable;
 238
 239         if (kit->ifkit->has_lcd == 0)
 240                 return -ENODEV;
 241
 242         if (sscanf(buf, "%d", &enable) < 1)
 243                 return -EINVAL;
 244
 245         if (enable) {
 246                 if (!kit->lcd_files_on) {
 247                         dev_dbg(&kit->udev->dev, "Adding lcd files\n");
 248                         device_create_file(&kit->intf->dev, &dev_attr_lcd_line_1);
 249                         device_create_file(&kit->intf->dev, &dev_attr_lcd_line_2);
 250                         device_create_file(&kit->intf->dev, &dev_attr_backlight);
 251                         kit->lcd_files_on = 1;
 252                 }
 253         } else {
 254                 if (kit->lcd_files_on) {
 255                         remove_lcd_files(kit);
 256                         kit->lcd_files_on = 0;
 257                 }
 258         }
 259
 260         return count;
 261 }
 262 static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);
 263
 264 static void interfacekit_irq(struct urb *urb, struct pt_regs *regs)
 265 {
 266         struct phidget_interfacekit *kit = urb->context;
 267         unsigned char *buffer = kit->data;
 268         int status;
 269         int n;
 270
 271         switch (urb->status) {
 272         case 0:                 /* success */
 273                 break;
 274         case -ECONNRESET:       /* unlink */
 275         case -ENOENT:
 276         case -ESHUTDOWN:
 277                 return;
 278         /* -EPIPE:  should clear the halt */
 279         default:                /* error */
 280                 goto resubmit;
 281         }
 282
 283         for (n=0; n<8; n++) {
 284                 kit->inputs[n] = buffer[1] & (1 << n) ? 1 : 0;
 285         }
 286
 287         if (buffer[0] & 1) {
 288                 kit->sensors[4] = buffer[2] + (buffer[3] & 0x0f) * 256;
 289                 kit->sensors[5] = buffer[4] + (buffer[3] & 0xf0) * 16;
 290                 kit->sensors[6] = buffer[5] + (buffer[6] & 0x0f) * 256;
 291                 kit->sensors[7] = buffer[7] + (buffer[6] & 0xf0) * 16;
 292         } else {
 293                 kit->sensors[0] = buffer[2] + (buffer[3] & 0x0f) * 256;
 294                 kit->sensors[1] = buffer[4] + (buffer[3] & 0xf0) * 16;
 295                 kit->sensors[2] = buffer[5] + (buffer[6] & 0x0f) * 256;
 296                 kit->sensors[3] = buffer[7] + (buffer[6] & 0xf0) * 16;
 297         }
 298
 299 resubmit:
 300         status = usb_submit_urb(urb, SLAB_ATOMIC);
 301         if (status)
 302                 err("can't resubmit intr, %s-%s/interfacekit0, status %d",
 303                         kit->udev->bus->bus_name,
 304                         kit->udev->devpath, status);
 305 }
 306
 307 #define show_set_output(value)          \
 308 static ssize_t set_output##value(struct device *dev, struct device_attribute *attr, const char *buf,    \
 309                                                         size_t count)   \
 310 {                                                                       \
 311         struct usb_interface *intf = to_usb_interface(dev);             \
 312         struct phidget_interfacekit *kit = usb_get_intfdata(intf);      \
 313         int enabled;                                                    \
 314         int retval;                                                     \
 315                                                                         \
 316         if (sscanf(buf, "%d", &enabled) < 1) {                          \
 317                 return -EINVAL;                                         \
 318         }                                                               \
 319                                                                         \
 320         retval = change_outputs(kit, value - 1, enabled ? 1 : 0);       \
 321                                                                         \
 322         return retval ? retval : count;                                 \
 323 }                                                                       \
 324                                                                         \
 325 static ssize_t show_output##value(struct device *dev, struct device_attribute *attr, char *buf) \
 326 {                                                                       \
 327         struct usb_interface *intf = to_usb_interface(dev);             \
 328         struct phidget_interfacekit *kit = usb_get_intfdata(intf);      \
 329                                                                         \
 330         return sprintf(buf, "%d\n", kit->outputs[value - 1]);           \
 331 }                                                                       \
 332 static DEVICE_ATTR(output##value, S_IWUGO | S_IRUGO,                    \
 333                 show_output##value, set_output##value);
 334 show_set_output(1);
 335 show_set_output(2);
 336 show_set_output(3);
 337 show_set_output(4);
 338 show_set_output(5);
 339 show_set_output(6);
 340 show_set_output(7);
 341 show_set_output(8);     /* should be MAX_INTERFACES - 1 */
 342
 343 #define show_input(value)       \
 344 static ssize_t show_input##value(struct device *dev, struct device_attribute *attr, char *buf)  \
 345 {                                                                       \
 346         struct usb_interface *intf = to_usb_interface(dev);             \
 347         struct phidget_interfacekit *kit = usb_get_intfdata(intf);      \
 348                                                                         \
 349         return sprintf(buf, "%d\n", kit->inputs[value - 1]);            \
 350 }                                                                       \
 351 static DEVICE_ATTR(input##value, S_IRUGO, show_input##value, NULL);
 352
 353 show_input(1);
 354 show_input(2);
 355 show_input(3);
 356 show_input(4);
 357 show_input(5);
 358 show_input(6);
 359 show_input(7);
 360 show_input(8);          /* should be MAX_INTERFACES - 1 */
 361
 362 #define show_sensor(value)      \
 363 static ssize_t show_sensor##value(struct device *dev, struct device_attribute *attr, char *buf) \
 364 {                                                                       \
 365         struct usb_interface *intf = to_usb_interface(dev);             \
 366         struct phidget_interfacekit *kit = usb_get_intfdata(intf);      \
 367                                                                         \
 368         return sprintf(buf, "%d\n", kit->sensors[value - 1]);           \
 369 }                                                                       \
 370 static DEVICE_ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL);
 371
 372 show_sensor(1);
 373 show_sensor(2);
 374 show_sensor(3);
 375 show_sensor(4);
 376 show_sensor(5);
 377 show_sensor(6);
 378 show_sensor(7);
 379 show_sensor(8);         /* should be MAX_INTERFACES - 1 */
 380
 381 static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
 382 {
 383         struct usb_device *dev = interface_to_usbdev(intf);
 384         struct usb_host_interface *interface;
 385         struct usb_endpoint_descriptor *endpoint;
 386         struct phidget_interfacekit *kit;
 387         struct driver_interfacekit *ifkit;
 388         int pipe, maxp;
 389
 390         ifkit = (struct driver_interfacekit *)id->driver_info;
 391         if (!ifkit)
 392                 return -ENODEV;
 393
 394         interface = intf->cur_altsetting;
 395         if (interface->desc.bNumEndpoints != 1)
 396                 return -ENODEV;
 397
 398         endpoint = &interface->endpoint[0].desc;
 399         if (!(endpoint->bEndpointAddress & 0x80))
 400                 return -ENODEV;
 401         /*
 402          * bmAttributes
 403          */
 404         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 405         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 406
 407         kit = kzalloc(sizeof(*kit), GFP_KERNEL);
 408         if (kit  == NULL) {
 409                 dev_err(&intf->dev, "%s - out of memory\n", __FUNCTION__);
 410                 return -ENOMEM;
 411         }
 412         kit->ifkit = ifkit;
 413
 414         kit->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kit->data_dma);
 415         if (!kit->data) {
 416                 kfree(kit);
 417                 return -ENOMEM;
 418         }
 419
 420         kit->irq = usb_alloc_urb(0, GFP_KERNEL);
 421         if (!kit->irq) {
 422                 usb_buffer_free(dev, 8, kit->data, kit->data_dma);
 423                 kfree(kit);
 424                 return -ENOMEM;
 425         }
 426
 427         kit->udev = usb_get_dev(dev);
 428         kit->intf = intf;
 429         usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
 430                         (maxp > 8 ? 8 : maxp),
 431                         interfacekit_irq, kit, endpoint->bInterval);
 432         kit->irq->transfer_dma = kit->data_dma;
 433         kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 434
 435         usb_set_intfdata(intf, kit);
 436
 437         if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
 438                 return -EIO;
 439         }
 440
 441         if (ifkit->outputs >= 4) {
 442                 device_create_file(&intf->dev, &dev_attr_output1);
 443                 device_create_file(&intf->dev, &dev_attr_output2);
 444                 device_create_file(&intf->dev, &dev_attr_output3);
 445                 device_create_file(&intf->dev, &dev_attr_output4);
 446         }
 447         if (ifkit->outputs == 8) {
 448                 device_create_file(&intf->dev, &dev_attr_output5);
 449                 device_create_file(&intf->dev, &dev_attr_output6);
 450                 device_create_file(&intf->dev, &dev_attr_output7);
 451                 device_create_file(&intf->dev, &dev_attr_output8);
 452         }
 453
 454         if (ifkit->inputs >= 4) {
 455                 device_create_file(&intf->dev, &dev_attr_input1);
 456                 device_create_file(&intf->dev, &dev_attr_input2);
 457                 device_create_file(&intf->dev, &dev_attr_input3);
 458                 device_create_file(&intf->dev, &dev_attr_input4);
 459         }
 460         if (ifkit->inputs == 8) {
 461                 device_create_file(&intf->dev, &dev_attr_input5);
 462                 device_create_file(&intf->dev, &dev_attr_input6);
 463                 device_create_file(&intf->dev, &dev_attr_input7);
 464                 device_create_file(&intf->dev, &dev_attr_input8);
 465         }
 466
 467         if (ifkit->sensors >= 4) {
 468                 device_create_file(&intf->dev, &dev_attr_sensor1);
 469                 device_create_file(&intf->dev, &dev_attr_sensor2);
 470                 device_create_file(&intf->dev, &dev_attr_sensor3);
 471                 device_create_file(&intf->dev, &dev_attr_sensor4);
 472         }
 473         if (ifkit->sensors >= 7) {
 474                 device_create_file(&intf->dev, &dev_attr_sensor5);
 475                 device_create_file(&intf->dev, &dev_attr_sensor6);
 476                 device_create_file(&intf->dev, &dev_attr_sensor7);
 477         }
 478         if (ifkit->sensors == 8) {
 479                 device_create_file(&intf->dev, &dev_attr_sensor8);
 480         }
 481
 482         if (ifkit->has_lcd)
 483                 device_create_file(&intf->dev, &dev_attr_lcd);
 484
 485         dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
 486                         ifkit->sensors, ifkit->inputs, ifkit->outputs);
 487
 488         return 0;
 489 }
 490
 491 static void interfacekit_disconnect(struct usb_interface *interface)
 492 {
 493         struct phidget_interfacekit *kit;
 494
 495         kit = usb_get_intfdata(interface);
 496         usb_set_intfdata(interface, NULL);
 497         if (!kit)
 498                 return;
 499
 500         if (kit->ifkit->outputs >= 4) {
 501                 device_remove_file(&interface->dev, &dev_attr_output1);
 502                 device_remove_file(&interface->dev, &dev_attr_output2);
 503                 device_remove_file(&interface->dev, &dev_attr_output3);
 504                 device_remove_file(&interface->dev, &dev_attr_output4);
 505         }
 506         if (kit->ifkit->outputs == 8) {
 507                 device_remove_file(&interface->dev, &dev_attr_output5);
 508                 device_remove_file(&interface->dev, &dev_attr_output6);
 509                 device_remove_file(&interface->dev, &dev_attr_output7);
 510                 device_remove_file(&interface->dev, &dev_attr_output8);
 511         }
 512
 513         if (kit->ifkit->inputs >= 4) {
 514                 device_remove_file(&interface->dev, &dev_attr_input1);
 515                 device_remove_file(&interface->dev, &dev_attr_input2);
 516                 device_remove_file(&interface->dev, &dev_attr_input3);
 517                 device_remove_file(&interface->dev, &dev_attr_input4);
 518         }
 519         if (kit->ifkit->inputs == 8) {
 520                 device_remove_file(&interface->dev, &dev_attr_input5);
 521                 device_remove_file(&interface->dev, &dev_attr_input6);
 522                 device_remove_file(&interface->dev, &dev_attr_input7);
 523                 device_remove_file(&interface->dev, &dev_attr_input8);
 524         }
 525
 526         if (kit->ifkit->sensors >= 4) {
 527                 device_remove_file(&interface->dev, &dev_attr_sensor1);
 528                 device_remove_file(&interface->dev, &dev_attr_sensor2);
 529                 device_remove_file(&interface->dev, &dev_attr_sensor3);
 530                 device_remove_file(&interface->dev, &dev_attr_sensor4);
 531         }
 532         if (kit->ifkit->sensors >= 7) {
 533                 device_remove_file(&interface->dev, &dev_attr_sensor5);
 534                 device_remove_file(&interface->dev, &dev_attr_sensor6);
 535                 device_remove_file(&interface->dev, &dev_attr_sensor7);
 536         }
 537         if (kit->ifkit->sensors == 8) {
 538                 device_remove_file(&interface->dev, &dev_attr_sensor8);
 539         }
 540         if (kit->ifkit->has_lcd)
 541                 device_remove_file(&interface->dev, &dev_attr_lcd);
 542
 543         dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
 544                 kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);
 545
 546         usb_kill_urb(kit->irq);
 547         usb_free_urb(kit->irq);
 548         usb_buffer_free(kit->udev, 8, kit->data, kit->data_dma);
 549
 550         usb_put_dev(kit->udev);
 551         kfree(kit);
 552 }
 553
 554 static struct usb_driver interfacekit_driver = {
 555         .name = "phidgetkit",
 556         .probe = interfacekit_probe,
 557         .disconnect = interfacekit_disconnect,
 558         .id_table = id_table
 559 };
 560
 561 static int __init interfacekit_init(void)
 562 {
 563         int retval = 0;
 564
 565         retval = usb_register(&interfacekit_driver);
 566         if (retval)
 567                 err("usb_register failed. Error number %d", retval);
 568
 569         return retval;
 570 }
 571
 572 static void __exit interfacekit_exit(void)
 573 {
 574         usb_deregister(&interfacekit_driver);
 575 }
 576
 577 module_init(interfacekit_init);
 578 module_exit(interfacekit_exit);
 579
 580 MODULE_AUTHOR(DRIVER_AUTHOR);
 581 MODULE_DESCRIPTION(DRIVER_DESC);
 582 MODULE_LICENSE("GPL");