drivers/usb/core/devio.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      devio.c  --  User space communication with USB devices.
   5  *
   6  *      Copyright (C) 1999-2000  Thomas Sailer (sailer@ife.ee.ethz.ch)
   7  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  *
  13  *      This program is distributed in the hope that it will be useful,
  14  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *      GNU General Public License for more details.
  17  *
  18  *      You should have received a copy of the GNU General Public License
  19  *      along with this program; if not, write to the Free Software
  20  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  *  $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
  23  *
  24  *  This file implements the usbdevfs/x/y files, where
  25  *  x is the bus number and y the device number.
  26  *
  27  *  It allows user space programs/"drivers" to communicate directly
  28  *  with USB devices without intervening kernel driver.
  29  *
  30  *  Revision history
  31  *    22.12.1999   0.1   Initial release (split from proc_usb.c)
  32  *    04.01.2000   0.2   Turned into its own filesystem
  33  */
  34
  35 /*****************************************************************************/
  36
  37 #include <linux/fs.h>
  38 #include <linux/mm.h>
  39 #include <linux/slab.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/signal.h>
  42 #include <linux/poll.h>
  43 #include <linux/module.h>
  44 #include <linux/usb.h>
  45 #include <linux/usbdevice_fs.h>
  46 #include <asm/uaccess.h>
  47 #include <asm/byteorder.h>
  48 #include <linux/moduleparam.h>
  49
  50 #include "hcd.h"        /* for usbcore internals */
  51 #include "usb.h"
  52
  53 struct async {
  54         struct list_head asynclist;
  55         struct dev_state *ps;
  56         struct task_struct *task;
  57         unsigned int signr;
  58         unsigned int ifnum;
  59         void __user *userbuffer;
  60         void __user *userurb;
  61         struct urb *urb;
  62 };
  63
  64 static int usbfs_snoop = 0;
  65 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
  66 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
  67
  68 #define snoop(dev, format, arg...)                              \
  69         do {                                                    \
  70                 if (usbfs_snoop)                                \
  71                         dev_info( dev , format , ## arg);       \
  72         } while (0)
  73
  74
  75 static inline int connected (struct usb_device *dev)
  76 {
  77         return dev->state != USB_STATE_NOTATTACHED;
  78 }
  79
  80 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
  81 {
  82         loff_t ret;
  83
  84         lock_kernel();
  85
  86         switch (orig) {
  87         case 0:
  88                 file->f_pos = offset;
  89                 ret = file->f_pos;
  90                 break;
  91         case 1:
  92                 file->f_pos += offset;
  93                 ret = file->f_pos;
  94                 break;
  95         case 2:
  96         default:
  97                 ret = -EINVAL;
  98         }
  99
 100         unlock_kernel();
 101         return ret;
 102 }
 103
 104 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 105 {
 106         struct dev_state *ps = (struct dev_state *)file->private_data;
 107         struct usb_device *dev = ps->dev;
 108         ssize_t ret = 0;
 109         unsigned len;
 110         loff_t pos;
 111         int i;
 112
 113         pos = *ppos;
 114         down(&dev->serialize);
 115         if (!connected(dev)) {
 116                 ret = -ENODEV;
 117                 goto err;
 118         } else if (pos < 0) {
 119                 ret = -EINVAL;
 120                 goto err;
 121         }
 122
 123         if (pos < sizeof(struct usb_device_descriptor)) {
 124                 len = sizeof(struct usb_device_descriptor) - pos;
 125                 if (len > nbytes)
 126                         len = nbytes;
 127                 if (copy_to_user(buf, ((char *)&dev->descriptor) + pos, len)) {
 128                         ret = -EFAULT;
 129                         goto err;
 130                 }
 131
 132                 *ppos += len;
 133                 buf += len;
 134                 nbytes -= len;
 135                 ret += len;
 136         }
 137
 138         pos = sizeof(struct usb_device_descriptor);
 139         for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
 140                 struct usb_config_descriptor *config =
 141                         (struct usb_config_descriptor *)dev->rawdescriptors[i];
 142                 unsigned int length = le16_to_cpu(config->wTotalLength);
 143
 144                 if (*ppos < pos + length) {
 145
 146                         /* The descriptor may claim to be longer than it
 147                          * really is.  Here is the actual allocated length. */
 148                         unsigned alloclen =
 149                                 dev->config[i].desc.wTotalLength;
 150
 151                         len = length - (*ppos - pos);
 152                         if (len > nbytes)
 153                                 len = nbytes;
 154
 155                         /* Simply don't write (skip over) unallocated parts */
 156                         if (alloclen > (*ppos - pos)) {
 157                                 alloclen -= (*ppos - pos);
 158                                 if (copy_to_user(buf,
 159                                     dev->rawdescriptors[i] + (*ppos - pos),
 160                                     min(len, alloclen))) {
 161                                         ret = -EFAULT;
 162                                         goto err;
 163                                 }
 164                         }
 165
 166                         *ppos += len;
 167                         buf += len;
 168                         nbytes -= len;
 169                         ret += len;
 170                 }
 171
 172                 pos += length;
 173         }
 174
 175 err:
 176         up(&dev->serialize);
 177         return ret;
 178 }
 179
 180 /*
 181  * async list handling
 182  */
 183
 184 static struct async *alloc_async(unsigned int numisoframes)
 185 {
 186         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
 187         struct async *as = kmalloc(assize, GFP_KERNEL);
 188         if (!as)
 189                 return NULL;
 190         memset(as, 0, assize);
 191         as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
 192         if (!as->urb) {
 193                 kfree(as);
 194                 return NULL;
 195         }
 196         return as;
 197 }
 198
 199 static void free_async(struct async *as)
 200 {
 201         if (as->urb->transfer_buffer)
 202                 kfree(as->urb->transfer_buffer);
 203         if (as->urb->setup_packet)
 204                 kfree(as->urb->setup_packet);
 205         usb_free_urb(as->urb);
 206         kfree(as);
 207 }
 208
 209 static inline void async_newpending(struct async *as)
 210 {
 211         struct dev_state *ps = as->ps;
 212         unsigned long flags;
 213
 214         spin_lock_irqsave(&ps->lock, flags);
 215         list_add_tail(&as->asynclist, &ps->async_pending);
 216         spin_unlock_irqrestore(&ps->lock, flags);
 217 }
 218
 219 static inline void async_removepending(struct async *as)
 220 {
 221         struct dev_state *ps = as->ps;
 222         unsigned long flags;
 223
 224         spin_lock_irqsave(&ps->lock, flags);
 225         list_del_init(&as->asynclist);
 226         spin_unlock_irqrestore(&ps->lock, flags);
 227 }
 228
 229 static inline struct async *async_getcompleted(struct dev_state *ps)
 230 {
 231         unsigned long flags;
 232         struct async *as = NULL;
 233
 234         spin_lock_irqsave(&ps->lock, flags);
 235         if (!list_empty(&ps->async_completed)) {
 236                 as = list_entry(ps->async_completed.next, struct async, asynclist);
 237                 list_del_init(&as->asynclist);
 238         }
 239         spin_unlock_irqrestore(&ps->lock, flags);
 240         return as;
 241 }
 242
 243 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
 244 {
 245         unsigned long flags;
 246         struct async *as;
 247
 248         spin_lock_irqsave(&ps->lock, flags);
 249         list_for_each_entry(as, &ps->async_pending, asynclist)
 250                 if (as->userurb == userurb) {
 251                         list_del_init(&as->asynclist);
 252                         spin_unlock_irqrestore(&ps->lock, flags);
 253                         return as;
 254                 }
 255         spin_unlock_irqrestore(&ps->lock, flags);
 256         return NULL;
 257 }
 258
 259 static void async_completed(struct urb *urb, struct pt_regs *regs)
 260 {
 261         struct async *as = (struct async *)urb->context;
 262         struct dev_state *ps = as->ps;
 263         struct siginfo sinfo;
 264
 265         spin_lock(&ps->lock);
 266         list_move_tail(&as->asynclist, &ps->async_completed);
 267         spin_unlock(&ps->lock);
 268         if (as->signr) {
 269                 sinfo.si_signo = as->signr;
 270                 sinfo.si_errno = as->urb->status;
 271                 sinfo.si_code = SI_ASYNCIO;
 272                 sinfo.si_addr = (void *)as->userurb;
 273                 send_sig_info(as->signr, &sinfo, as->task);
 274         }
 275         wake_up(&ps->wait);
 276 }
 277
 278 static void destroy_async (struct dev_state *ps, struct list_head *list)
 279 {
 280         struct async *as;
 281         unsigned long flags;
 282
 283         spin_lock_irqsave(&ps->lock, flags);
 284         while (!list_empty(list)) {
 285                 as = list_entry(list->next, struct async, asynclist);
 286                 list_del_init(&as->asynclist);
 287                 spin_unlock_irqrestore(&ps->lock, flags);
 288                 /* usb_unlink_urb calls the completion handler with status == -ENOENT */
 289                 usb_unlink_urb(as->urb);
 290                 spin_lock_irqsave(&ps->lock, flags);
 291         }
 292         spin_unlock_irqrestore(&ps->lock, flags);
 293         while ((as = async_getcompleted(ps)))
 294                 free_async(as);
 295 }
 296
 297 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
 298 {
 299         struct list_head *p, *q, hitlist;
 300         unsigned long flags;
 301
 302         INIT_LIST_HEAD(&hitlist);
 303         spin_lock_irqsave(&ps->lock, flags);
 304         list_for_each_safe(p, q, &ps->async_pending)
 305                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
 306                         list_move_tail(p, &hitlist);
 307         spin_unlock_irqrestore(&ps->lock, flags);
 308         destroy_async(ps, &hitlist);
 309 }
 310
 311 static inline void destroy_all_async(struct dev_state *ps)
 312 {
 313                 destroy_async(ps, &ps->async_pending);
 314 }
 315
 316 /*
 317  * interface claims are made only at the request of user level code,
 318  * which can also release them (explicitly or by closing files).
 319  * they're also undone when devices disconnect.
 320  */
 321
 322 static int driver_probe (struct usb_interface *intf,
 323                          const struct usb_device_id *id)
 324 {
 325         return -ENODEV;
 326 }
 327
 328 static void driver_disconnect(struct usb_interface *intf)
 329 {
 330         struct dev_state *ps = usb_get_intfdata (intf);
 331         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
 332
 333         if (!ps)
 334                 return;
 335
 336         /* NOTE:  this relies on usbcore having canceled and completed
 337          * all pending I/O requests; 2.6 does that.
 338          */
 339
 340         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
 341                 clear_bit(ifnum, &ps->ifclaimed);
 342         else
 343                 warn("interface number %u out of range", ifnum);
 344
 345         usb_set_intfdata (intf, NULL);
 346
 347         /* force async requests to complete */
 348         destroy_async_on_interface(ps, ifnum);
 349 }
 350
 351 struct usb_driver usbdevfs_driver = {
 352         .owner =        THIS_MODULE,
 353         .name =         "usbfs",
 354         .probe =        driver_probe,
 355         .disconnect =   driver_disconnect,
 356 };
 357
 358 static int claimintf(struct dev_state *ps, unsigned int ifnum)
 359 {
 360         struct usb_device *dev = ps->dev;
 361         struct usb_interface *intf;
 362         int err;
 363
 364         if (ifnum >= 8*sizeof(ps->ifclaimed))
 365                 return -EINVAL;
 366         /* already claimed */
 367         if (test_bit(ifnum, &ps->ifclaimed))
 368                 return 0;
 369
 370         /* lock against other changes to driver bindings */
 371         down_write(&usb_bus_type.subsys.rwsem);
 372         intf = usb_ifnum_to_if(dev, ifnum);
 373         if (!intf)
 374                 err = -ENOENT;
 375         else
 376                 err = usb_driver_claim_interface(&usbdevfs_driver, intf, ps);
 377         up_write(&usb_bus_type.subsys.rwsem);
 378         if (err == 0)
 379                 set_bit(ifnum, &ps->ifclaimed);
 380         return err;
 381 }
 382
 383 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
 384 {
 385         struct usb_device *dev;
 386         struct usb_interface *intf;
 387         int err;
 388
 389         err = -EINVAL;
 390         if (ifnum >= 8*sizeof(ps->ifclaimed))
 391                 return err;
 392         dev = ps->dev;
 393         /* lock against other changes to driver bindings */
 394         down_write(&usb_bus_type.subsys.rwsem);
 395         intf = usb_ifnum_to_if(dev, ifnum);
 396         if (!intf)
 397                 err = -ENOENT;
 398         else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
 399                 usb_driver_release_interface(&usbdevfs_driver, intf);
 400                 err = 0;
 401         }
 402         up_write(&usb_bus_type.subsys.rwsem);
 403         return err;
 404 }
 405
 406 static int checkintf(struct dev_state *ps, unsigned int ifnum)
 407 {
 408         if (ifnum >= 8*sizeof(ps->ifclaimed))
 409                 return -EINVAL;
 410         if (test_bit(ifnum, &ps->ifclaimed))
 411                 return 0;
 412         /* if not yet claimed, claim it for the driver */
 413         dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
 414                current->pid, current->comm, ifnum);
 415         return claimintf(ps, ifnum);
 416 }
 417
 418 static int findintfep(struct usb_device *dev, unsigned int ep)
 419 {
 420         unsigned int i, j, e;
 421         struct usb_interface *intf;
 422         struct usb_host_interface *alts;
 423         struct usb_endpoint_descriptor *endpt;
 424
 425         if (ep & ~(USB_DIR_IN|0xf))
 426                 return -EINVAL;
 427         if (!dev->actconfig)
 428                 return -ESRCH;
 429         for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
 430                 intf = dev->actconfig->interface[i];
 431                 for (j = 0; j < intf->num_altsetting; j++) {
 432                         alts = &intf->altsetting[j];
 433                         for (e = 0; e < alts->desc.bNumEndpoints; e++) {
 434                                 endpt = &alts->endpoint[e].desc;
 435                                 if (endpt->bEndpointAddress == ep)
 436                                         return alts->desc.bInterfaceNumber;
 437                         }
 438                 }
 439         }
 440         return -ENOENT;
 441 }
 442
 443 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
 444 {
 445         int ret = 0;
 446
 447         if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
 448                 return 0;
 449
 450         index &= 0xff;
 451         switch (requesttype & USB_RECIP_MASK) {
 452         case USB_RECIP_ENDPOINT:
 453                 if ((ret = findintfep(ps->dev, index)) >= 0)
 454                         ret = checkintf(ps, ret);
 455                 break;
 456
 457         case USB_RECIP_INTERFACE:
 458                 ret = checkintf(ps, index);
 459                 break;
 460         }
 461         return ret;
 462 }
 463
 464 /*
 465  * file operations
 466  */
 467 static int usbdev_open(struct inode *inode, struct file *file)
 468 {
 469         struct usb_device *dev;
 470         struct dev_state *ps;
 471         int ret;
 472
 473         /*
 474          * no locking necessary here, as chrdev_open has the kernel lock
 475          * (still acquire the kernel lock for safety)
 476          */
 477         ret = -ENOMEM;
 478         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
 479                 goto out_nolock;
 480
 481         lock_kernel();
 482         ret = -ENOENT;
 483         dev = usb_get_dev(inode->u.generic_ip);
 484         if (!dev) {
 485                 kfree(ps);
 486                 goto out;
 487         }
 488         ret = 0;
 489         ps->dev = dev;
 490         ps->file = file;
 491         spin_lock_init(&ps->lock);
 492         INIT_LIST_HEAD(&ps->async_pending);
 493         INIT_LIST_HEAD(&ps->async_completed);
 494         init_waitqueue_head(&ps->wait);
 495         ps->discsignr = 0;
 496         ps->disctask = current;
 497         ps->disccontext = NULL;
 498         ps->ifclaimed = 0;
 499         wmb();
 500         list_add_tail(&ps->list, &dev->filelist);
 501         file->private_data = ps;
 502  out:
 503         unlock_kernel();
 504  out_nolock:
 505         return ret;
 506 }
 507
 508 static int usbdev_release(struct inode *inode, struct file *file)
 509 {
 510         struct dev_state *ps = (struct dev_state *)file->private_data;
 511         struct usb_device *dev = ps->dev;
 512         unsigned int ifnum;
 513
 514         down(&dev->serialize);
 515         list_del_init(&ps->list);
 516
 517         if (connected(dev)) {
 518                 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); ifnum++)
 519                         if (test_bit(ifnum, &ps->ifclaimed))
 520                                 releaseintf(ps, ifnum);
 521                 destroy_all_async(ps);
 522         }
 523         up(&dev->serialize);
 524         usb_put_dev(dev);
 525         ps->dev = NULL;
 526         kfree(ps);
 527         return 0;
 528 }
 529
 530 static int proc_control(struct dev_state *ps, void __user *arg)
 531 {
 532         struct usb_device *dev = ps->dev;
 533         struct usbdevfs_ctrltransfer ctrl;
 534         unsigned int tmo;
 535         unsigned char *tbuf;
 536         int i, j, ret;
 537
 538         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
 539                 return -EFAULT;
 540         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
 541                 return ret;
 542         if (ctrl.wLength > PAGE_SIZE)
 543                 return -EINVAL;
 544         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
 545                 return -ENOMEM;
 546         tmo = (ctrl.timeout * HZ + 999) / 1000;
 547         if (ctrl.bRequestType & 0x80) {
 548                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
 549                         free_page((unsigned long)tbuf);
 550                         return -EINVAL;
 551                 }
 552                 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 553                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 554
 555                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 556                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 557                 if ((i > 0) && ctrl.wLength) {
 558                         if (usbfs_snoop) {
 559                                 dev_info(&dev->dev, "control read: data ");
 560                                 for (j = 0; j < ctrl.wLength; ++j)
 561                                         printk ("%02x ", (unsigned char)((char *)ctrl.data)[j]);
 562                                 printk("\n");
 563                         }
 564                         if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) {
 565                                 free_page((unsigned long)tbuf);
 566                                 return -EFAULT;
 567                         }
 568                 }
 569         } else {
 570                 if (ctrl.wLength) {
 571                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
 572                                 free_page((unsigned long)tbuf);
 573                                 return -EFAULT;
 574                         }
 575                 }
 576                 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 577                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 578                 if (usbfs_snoop) {
 579                         dev_info(&dev->dev, "control write: data: ");
 580                         for (j = 0; j < ctrl.wLength; ++j)
 581                                 printk ("%02x ", (unsigned char)((char *)ctrl.data)[j]);
 582                         printk("\n");
 583                 }
 584                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 585                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 586         }
 587         free_page((unsigned long)tbuf);
 588         if (i<0) {
 589                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
 590                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
 591                            current->comm, ctrl.bRequestType, ctrl.bRequest,
 592                            ctrl.wLength, i);
 593         }
 594         return i;
 595 }
 596
 597 static int proc_bulk(struct dev_state *ps, void __user *arg)
 598 {
 599         struct usb_device *dev = ps->dev;
 600         struct usbdevfs_bulktransfer bulk;
 601         unsigned int tmo, len1, pipe;
 602         int len2;
 603         unsigned char *tbuf;
 604         int i, ret;
 605
 606         if (copy_from_user(&bulk, arg, sizeof(bulk)))
 607                 return -EFAULT;
 608         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
 609                 return ret;
 610         if ((ret = checkintf(ps, ret)))
 611                 return ret;
 612         if (bulk.ep & USB_DIR_IN)
 613                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
 614         else
 615                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
 616         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 617                 return -EINVAL;
 618         len1 = bulk.len;
 619         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
 620                 return -ENOMEM;
 621         tmo = (bulk.timeout * HZ + 999) / 1000;
 622         if (bulk.ep & 0x80) {
 623                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
 624                         kfree(tbuf);
 625                         return -EINVAL;
 626                 }
 627                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 628                 if (!i && len2) {
 629                         if (copy_to_user(bulk.data, tbuf, len2)) {
 630                                 kfree(tbuf);
 631                                 return -EFAULT;
 632                         }
 633                 }
 634         } else {
 635                 if (len1) {
 636                         if (copy_from_user(tbuf, bulk.data, len1)) {
 637                                 kfree(tbuf);
 638                                 return -EFAULT;
 639                         }
 640                 }
 641                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 642         }
 643         kfree(tbuf);
 644         if (i < 0) {
 645                 dev_warn(&dev->dev, "usbfs: USBDEVFS_BULK failed "
 646                          "ep 0x%x len %u ret %d\n", bulk.ep, bulk.len, i);
 647                 return i;
 648         }
 649         return len2;
 650 }
 651
 652 static int proc_resetep(struct dev_state *ps, void __user *arg)
 653 {
 654         unsigned int ep;
 655         int ret;
 656
 657         if (get_user(ep, (unsigned int __user *)arg))
 658                 return -EFAULT;
 659         if ((ret = findintfep(ps->dev, ep)) < 0)
 660                 return ret;
 661         if ((ret = checkintf(ps, ret)))
 662                 return ret;
 663         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
 664         return 0;
 665 }
 666
 667 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
 668 {
 669         unsigned int ep;
 670         int pipe;
 671         int ret;
 672
 673         if (get_user(ep, (unsigned int __user *)arg))
 674                 return -EFAULT;
 675         if ((ret = findintfep(ps->dev, ep)) < 0)
 676                 return ret;
 677         if ((ret = checkintf(ps, ret)))
 678                 return ret;
 679         if (ep & USB_DIR_IN)
 680                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
 681         else
 682                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
 683
 684         return usb_clear_halt(ps->dev, pipe);
 685 }
 686
 687
 688 static int proc_getdriver(struct dev_state *ps, void __user *arg)
 689 {
 690         struct usbdevfs_getdriver gd;
 691         struct usb_interface *intf;
 692         int ret;
 693
 694         if (copy_from_user(&gd, arg, sizeof(gd)))
 695                 return -EFAULT;
 696         down_read(&usb_bus_type.subsys.rwsem);
 697         intf = usb_ifnum_to_if(ps->dev, gd.interface);
 698         if (!intf || !intf->dev.driver)
 699                 ret = -ENODATA;
 700         else {
 701                 strncpy(gd.driver, intf->dev.driver->name,
 702                                 sizeof(gd.driver));
 703                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
 704         }
 705         up_read(&usb_bus_type.subsys.rwsem);
 706         return ret;
 707 }
 708
 709 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 710 {
 711         struct usbdevfs_connectinfo ci;
 712
 713         ci.devnum = ps->dev->devnum;
 714         ci.slow = ps->dev->speed == USB_SPEED_LOW;
 715         if (copy_to_user(arg, &ci, sizeof(ci)))
 716                 return -EFAULT;
 717         return 0;
 718 }
 719
 720 static int proc_resetdevice(struct dev_state *ps)
 721 {
 722         return __usb_reset_device(ps->dev);
 723
 724 }
 725
 726 static int proc_setintf(struct dev_state *ps, void __user *arg)
 727 {
 728         struct usbdevfs_setinterface setintf;
 729         int ret;
 730
 731         if (copy_from_user(&setintf, arg, sizeof(setintf)))
 732                 return -EFAULT;
 733         if ((ret = checkintf(ps, setintf.interface)))
 734                 return ret;
 735         return usb_set_interface(ps->dev, setintf.interface,
 736                         setintf.altsetting);
 737 }
 738
 739 static int proc_setconfig(struct dev_state *ps, void __user *arg)
 740 {
 741         unsigned int u;
 742         int status = 0;
 743         struct usb_host_config *actconfig;
 744
 745         if (get_user(u, (unsigned int __user *)arg))
 746                 return -EFAULT;
 747
 748         actconfig = ps->dev->actconfig;
 749
 750         /* Don't touch the device if any interfaces are claimed.
 751          * It could interfere with other drivers' operations, and if
 752          * an interface is claimed by usbfs it could easily deadlock.
 753          */
 754         if (actconfig) {
 755                 int i;
 756
 757                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
 758                         if (usb_interface_claimed(actconfig->interface[i])) {
 759                                 dev_warn (&ps->dev->dev,
 760                                         "usbfs: interface %d claimed "
 761                                         "while '%s' sets config #%d\n",
 762                                         actconfig->interface[i]
 763                                                 ->cur_altsetting
 764                                                 ->desc.bInterfaceNumber,
 765                                         current->comm, u);
 766 #if 0   /* FIXME:  enable in 2.6.10 or so */
 767                                 status = -EBUSY;
 768                                 break;
 769 #endif
 770                         }
 771                 }
 772         }
 773
 774         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
 775          * so avoid usb_set_configuration()'s kick to sysfs
 776          */
 777         if (status == 0) {
 778                 if (actconfig && actconfig->desc.bConfigurationValue == u)
 779                         status = usb_reset_configuration(ps->dev);
 780                 else
 781                         status = usb_set_configuration(ps->dev, u);
 782         }
 783
 784         return status;
 785 }
 786
 787 static int proc_submiturb(struct dev_state *ps, void __user *arg)
 788 {
 789         struct usbdevfs_urb uurb;
 790         struct usbdevfs_iso_packet_desc *isopkt = NULL;
 791         struct usb_endpoint_descriptor *ep_desc;
 792         struct async *as;
 793         struct usb_ctrlrequest *dr = NULL;
 794         unsigned int u, totlen, isofrmlen;
 795         int ret, interval = 0, ifnum = -1;
 796
 797         if (copy_from_user(&uurb, arg, sizeof(uurb)))
 798                 return -EFAULT;
 799         if (uurb.flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
 800                            URB_NO_FSBR|URB_ZERO_PACKET))
 801                 return -EINVAL;
 802         if (!uurb.buffer)
 803                 return -EINVAL;
 804         if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX))
 805                 return -EINVAL;
 806         if (!(uurb.type == USBDEVFS_URB_TYPE_CONTROL && (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
 807                 if ((ifnum = findintfep(ps->dev, uurb.endpoint)) < 0)
 808                         return ifnum;
 809                 if ((ret = checkintf(ps, ifnum)))
 810                         return ret;
 811         }
 812         switch(uurb.type) {
 813         case USBDEVFS_URB_TYPE_CONTROL:
 814                 if ((uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) != 0) {
 815                         if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 816                                 return -ENOENT;
 817                         if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_CONTROL)
 818                                 return -EINVAL;
 819                 }
 820                 /* min 8 byte setup packet, max arbitrary */
 821                 if (uurb.buffer_length < 8 || uurb.buffer_length > PAGE_SIZE)
 822                         return -EINVAL;
 823                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
 824                         return -ENOMEM;
 825                 if (copy_from_user(dr, uurb.buffer, 8)) {
 826                         kfree(dr);
 827                         return -EFAULT;
 828                 }
 829                 if (uurb.buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
 830                         kfree(dr);
 831                         return -EINVAL;
 832                 }
 833                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
 834                         kfree(dr);
 835                         return ret;
 836                 }
 837                 uurb.endpoint = (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
 838                 uurb.number_of_packets = 0;
 839                 uurb.buffer_length = le16_to_cpup(&dr->wLength);
 840                 uurb.buffer += 8;
 841                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length)) {
 842                         kfree(dr);
 843                         return -EFAULT;
 844                 }
 845                 break;
 846
 847         case USBDEVFS_URB_TYPE_BULK:
 848                 uurb.number_of_packets = 0;
 849                 if (uurb.buffer_length > 16384)
 850                         return -EINVAL;
 851                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 852                         return -EFAULT;
 853                 break;
 854
 855         case USBDEVFS_URB_TYPE_ISO:
 856                 /* arbitrary limit */
 857                 if (uurb.number_of_packets < 1 || uurb.number_of_packets > 128)
 858                         return -EINVAL;
 859                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 860                         return -ENOENT;
 861                 interval = 1 << min (15, ep_desc->bInterval - 1);
 862                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb.number_of_packets;
 863                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
 864                         return -ENOMEM;
 865                 if (copy_from_user(isopkt, &((struct usbdevfs_urb __user *)arg)->iso_frame_desc, isofrmlen)) {
 866                         kfree(isopkt);
 867                         return -EFAULT;
 868                 }
 869                 for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 870                         if (isopkt[u].length > 1023) {
 871                                 kfree(isopkt);
 872                                 return -EINVAL;
 873                         }
 874                         totlen += isopkt[u].length;
 875                 }
 876                 if (totlen > 32768) {
 877                         kfree(isopkt);
 878                         return -EINVAL;
 879                 }
 880                 uurb.buffer_length = totlen;
 881                 break;
 882
 883         case USBDEVFS_URB_TYPE_INTERRUPT:
 884                 uurb.number_of_packets = 0;
 885                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 886                         return -ENOENT;
 887                 if (ps->dev->speed == USB_SPEED_HIGH)
 888                         interval = 1 << min (15, ep_desc->bInterval - 1);
 889                 else
 890                         interval = ep_desc->bInterval;
 891                 if (uurb.buffer_length > 16384)
 892                         return -EINVAL;
 893                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 894                         return -EFAULT;
 895                 break;
 896
 897         default:
 898                 return -EINVAL;
 899         }
 900         if (!(as = alloc_async(uurb.number_of_packets))) {
 901                 if (isopkt)
 902                         kfree(isopkt);
 903                 if (dr)
 904                         kfree(dr);
 905                 return -ENOMEM;
 906         }
 907         if (!(as->urb->transfer_buffer = kmalloc(uurb.buffer_length, GFP_KERNEL))) {
 908                 if (isopkt)
 909                         kfree(isopkt);
 910                 if (dr)
 911                         kfree(dr);
 912                 free_async(as);
 913                 return -ENOMEM;
 914         }
 915         as->urb->dev = ps->dev;
 916         as->urb->pipe = (uurb.type << 30) | __create_pipe(ps->dev, uurb.endpoint & 0xf) | (uurb.endpoint & USB_DIR_IN);
 917         as->urb->transfer_flags = uurb.flags;
 918         as->urb->transfer_buffer_length = uurb.buffer_length;
 919         as->urb->setup_packet = (unsigned char*)dr;
 920         as->urb->start_frame = uurb.start_frame;
 921         as->urb->number_of_packets = uurb.number_of_packets;
 922         as->urb->interval = interval;
 923         as->urb->context = as;
 924         as->urb->complete = async_completed;
 925         for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 926                 as->urb->iso_frame_desc[u].offset = totlen;
 927                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
 928                 totlen += isopkt[u].length;
 929         }
 930         if (isopkt)
 931                 kfree(isopkt);
 932         as->ps = ps;
 933         as->userurb = arg;
 934         if (uurb.endpoint & USB_DIR_IN)
 935                 as->userbuffer = uurb.buffer;
 936         else
 937                 as->userbuffer = NULL;
 938         as->signr = uurb.signr;
 939         as->ifnum = ifnum;
 940         as->task = current;
 941         if (!(uurb.endpoint & USB_DIR_IN)) {
 942                 if (copy_from_user(as->urb->transfer_buffer, uurb.buffer, as->urb->transfer_buffer_length)) {
 943                         free_async(as);
 944                         return -EFAULT;
 945                 }
 946         }
 947         async_newpending(as);
 948         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
 949                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
 950                 async_removepending(as);
 951                 free_async(as);
 952                 return ret;
 953         }
 954         return 0;
 955 }
 956
 957 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
 958 {
 959         struct async *as;
 960
 961         as = async_getpending(ps, arg);
 962         if (!as)
 963                 return -EINVAL;
 964         usb_unlink_urb(as->urb);
 965         return 0;
 966 }
 967
 968 static int processcompl(struct async *as)
 969 {
 970         struct urb *urb = as->urb;
 971         unsigned int i;
 972
 973         if (as->userbuffer)
 974                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
 975                         return -EFAULT;
 976         if (put_user(urb->status,
 977                      &((struct usbdevfs_urb *)as->userurb)->status))
 978                 return -EFAULT;
 979         if (put_user(urb->actual_length,
 980                      &((struct usbdevfs_urb *)as->userurb)->actual_length))
 981                 return -EFAULT;
 982         if (put_user(urb->error_count,
 983                      &((struct usbdevfs_urb *)as->userurb)->error_count))
 984                 return -EFAULT;
 985
 986         if (!(usb_pipeisoc(urb->pipe)))
 987                 return 0;
 988         for (i = 0; i < urb->number_of_packets; i++) {
 989                 if (put_user(urb->iso_frame_desc[i].actual_length,
 990                              &((struct usbdevfs_urb *)as->userurb)->iso_frame_desc[i].actual_length))
 991                         return -EFAULT;
 992                 if (put_user(urb->iso_frame_desc[i].status,
 993                              &((struct usbdevfs_urb *)as->userurb)->iso_frame_desc[i].status))
 994                         return -EFAULT;
 995         }
 996         return 0;
 997 }
 998
 999 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1000 {
1001         DECLARE_WAITQUEUE(wait, current);
1002         struct async *as = NULL;
1003         void __user *addr;
1004         struct usb_device *dev = ps->dev;
1005         int ret;
1006
1007         add_wait_queue(&ps->wait, &wait);
1008         while (connected(dev)) {
1009                 __set_current_state(TASK_INTERRUPTIBLE);
1010                 if ((as = async_getcompleted(ps)))
1011                         break;
1012                 if (signal_pending(current))
1013                         break;
1014                 up(&dev->serialize);
1015                 schedule();
1016                 down(&dev->serialize);
1017         }
1018         remove_wait_queue(&ps->wait, &wait);
1019         set_current_state(TASK_RUNNING);
1020         if (as) {
1021                 ret = processcompl(as);
1022                 addr = as->userurb;
1023                 free_async(as);
1024                 if (ret)
1025                         return ret;
1026                 if (put_user(addr, (void __user * __user *)arg))
1027                         return -EFAULT;
1028                 return 0;
1029         }
1030         if (signal_pending(current))
1031                 return -EINTR;
1032         return -EIO;
1033 }
1034
1035 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1036 {
1037         struct async *as;
1038         void __user *addr;
1039         int ret;
1040
1041         if (!(as = async_getcompleted(ps)))
1042                 return -EAGAIN;
1043         ret = processcompl(as);
1044         addr = as->userurb;
1045         free_async(as);
1046         if (ret)
1047                 return ret;
1048         if (put_user(addr, (void __user * __user *)arg))
1049                 return -EFAULT;
1050         return 0;
1051 }
1052
1053 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1054 {
1055         struct usbdevfs_disconnectsignal ds;
1056
1057         if (copy_from_user(&ds, arg, sizeof(ds)))
1058                 return -EFAULT;
1059         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1060                 return -EINVAL;
1061         ps->discsignr = ds.signr;
1062         ps->disccontext = ds.context;
1063         return 0;
1064 }
1065
1066 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1067 {
1068         unsigned int ifnum;
1069
1070         if (get_user(ifnum, (unsigned int __user *)arg))
1071                 return -EFAULT;
1072         return claimintf(ps, ifnum);
1073 }
1074
1075 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1076 {
1077         unsigned int ifnum;
1078         int ret;
1079
1080         if (get_user(ifnum, (unsigned int __user *)arg))
1081                 return -EFAULT;
1082         if ((ret = releaseintf(ps, ifnum)) < 0)
1083                 return ret;
1084         destroy_async_on_interface (ps, ifnum);
1085         return 0;
1086 }
1087
1088 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1089 {
1090         struct usbdevfs_ioctl   ctrl;
1091         int                     size;
1092         void                    *buf = 0;
1093         int                     retval = 0;
1094         struct usb_interface    *intf = 0;
1095         struct usb_driver       *driver = 0;
1096
1097         /* get input parameters and alloc buffer */
1098         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1099                 return -EFAULT;
1100         if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1101                 if ((buf = kmalloc (size, GFP_KERNEL)) == 0)
1102                         return -ENOMEM;
1103                 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1104                         if (copy_from_user (buf, ctrl.data, size)) {
1105                                 kfree (buf);
1106                                 return -EFAULT;
1107                         }
1108                 } else {
1109                         memset (buf, 0, size);
1110                 }
1111         }
1112
1113         if (!connected(ps->dev)) {
1114                 if (buf)
1115                         kfree(buf);
1116                 return -ENODEV;
1117         }
1118
1119         if (ps->dev->state != USB_STATE_CONFIGURED)
1120                 retval = -ENODEV;
1121         else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1122                retval = -EINVAL;
1123         else switch (ctrl.ioctl_code) {
1124
1125         /* disconnect kernel driver from interface */
1126         case USBDEVFS_DISCONNECT:
1127                 down_write(&usb_bus_type.subsys.rwsem);
1128                 if (intf->dev.driver) {
1129                         driver = to_usb_driver(intf->dev.driver);
1130                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1131                         usb_driver_release_interface(driver, intf);
1132                 } else
1133                         retval = -ENODATA;
1134                 up_write(&usb_bus_type.subsys.rwsem);
1135                 break;
1136
1137         /* let kernel drivers try to (re)bind to the interface */
1138         case USBDEVFS_CONNECT:
1139                 bus_rescan_devices(intf->dev.bus);
1140                 break;
1141
1142         /* talk directly to the interface's driver */
1143         default:
1144                 down_read(&usb_bus_type.subsys.rwsem);
1145                 if (intf->dev.driver)
1146                         driver = to_usb_driver(intf->dev.driver);
1147                 if (driver == 0 || driver->ioctl == 0) {
1148                         retval = -ENOTTY;
1149                 } else {
1150                         retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1151                         if (retval == -ENOIOCTLCMD)
1152                                 retval = -ENOTTY;
1153                 }
1154                 up_read(&usb_bus_type.subsys.rwsem);
1155         }
1156
1157         /* cleanup and return */
1158         if (retval >= 0
1159                         && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1160                         && size > 0
1161                         && copy_to_user (ctrl.data, buf, size) != 0)
1162                 retval = -EFAULT;
1163         if (buf != 0)
1164                 kfree (buf);
1165         return retval;
1166 }
1167
1168 /*
1169  * NOTE:  All requests here that have interface numbers as parameters
1170  * are assuming that somehow the configuration has been prevented from
1171  * changing.  But there's no mechanism to ensure that...
1172  */
1173 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1174 {
1175         struct dev_state *ps = (struct dev_state *)file->private_data;
1176         struct usb_device *dev = ps->dev;
1177         void __user *p = (void __user *)arg;
1178         int ret = -ENOTTY;
1179
1180         if (!(file->f_mode & FMODE_WRITE))
1181                 return -EPERM;
1182         down(&dev->serialize);
1183         if (!connected(dev)) {
1184                 up(&dev->serialize);
1185                 return -ENODEV;
1186         }
1187
1188         switch (cmd) {
1189         case USBDEVFS_CONTROL:
1190                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1191                 ret = proc_control(ps, p);
1192                 if (ret >= 0)
1193                         inode->i_mtime = CURRENT_TIME;
1194                 break;
1195
1196         case USBDEVFS_BULK:
1197                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1198                 ret = proc_bulk(ps, p);
1199                 if (ret >= 0)
1200                         inode->i_mtime = CURRENT_TIME;
1201                 break;
1202
1203         case USBDEVFS_RESETEP:
1204                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1205                 ret = proc_resetep(ps, p);
1206                 if (ret >= 0)
1207                         inode->i_mtime = CURRENT_TIME;
1208                 break;
1209
1210         case USBDEVFS_RESET:
1211                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1212                 ret = proc_resetdevice(ps);
1213                 break;
1214
1215         case USBDEVFS_CLEAR_HALT:
1216                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1217                 ret = proc_clearhalt(ps, p);
1218                 if (ret >= 0)
1219                         inode->i_mtime = CURRENT_TIME;
1220                 break;
1221
1222         case USBDEVFS_GETDRIVER:
1223                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1224                 ret = proc_getdriver(ps, p);
1225                 break;
1226
1227         case USBDEVFS_CONNECTINFO:
1228                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1229                 ret = proc_connectinfo(ps, p);
1230                 break;
1231
1232         case USBDEVFS_SETINTERFACE:
1233                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1234                 ret = proc_setintf(ps, p);
1235                 break;
1236
1237         case USBDEVFS_SETCONFIGURATION:
1238                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1239                 ret = proc_setconfig(ps, p);
1240                 break;
1241
1242         case USBDEVFS_SUBMITURB:
1243                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1244                 ret = proc_submiturb(ps, p);
1245                 if (ret >= 0)
1246                         inode->i_mtime = CURRENT_TIME;
1247                 break;
1248
1249         case USBDEVFS_DISCARDURB:
1250                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1251                 ret = proc_unlinkurb(ps, p);
1252                 break;
1253
1254         case USBDEVFS_REAPURB:
1255                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1256                 ret = proc_reapurb(ps, p);
1257                 break;
1258
1259         case USBDEVFS_REAPURBNDELAY:
1260                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1261                 ret = proc_reapurbnonblock(ps, p);
1262                 break;
1263
1264         case USBDEVFS_DISCSIGNAL:
1265                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1266                 ret = proc_disconnectsignal(ps, p);
1267                 break;
1268
1269         case USBDEVFS_CLAIMINTERFACE:
1270                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1271                 ret = proc_claiminterface(ps, p);
1272                 break;
1273
1274         case USBDEVFS_RELEASEINTERFACE:
1275                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1276                 ret = proc_releaseinterface(ps, p);
1277                 break;
1278
1279         case USBDEVFS_IOCTL:
1280                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1281                 ret = proc_ioctl(ps, p);
1282                 break;
1283         }
1284         up(&dev->serialize);
1285         if (ret >= 0)
1286                 inode->i_atime = CURRENT_TIME;
1287         return ret;
1288 }
1289
1290 /* No kernel lock - fine */
1291 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1292 {
1293         struct dev_state *ps = (struct dev_state *)file->private_data;
1294         unsigned int mask = 0;
1295
1296         poll_wait(file, &ps->wait, wait);
1297         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1298                 mask |= POLLOUT | POLLWRNORM;
1299         if (!connected(ps->dev))
1300                 mask |= POLLERR | POLLHUP;
1301         return mask;
1302 }
1303
1304 struct file_operations usbdevfs_device_file_operations = {
1305         .llseek =       usbdev_lseek,
1306         .read =         usbdev_read,
1307         .poll =         usbdev_poll,
1308         .ioctl =        usbdev_ioctl,
1309         .open =         usbdev_open,
1310         .release =      usbdev_release,
1311 };