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 #define MAX_USBFS_BUFFER_SIZE   16384
  76
  77 static inline int connected (struct usb_device *dev)
  78 {
  79         return dev->state != USB_STATE_NOTATTACHED;
  80 }
  81
  82 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
  83 {
  84         loff_t ret;
  85
  86         lock_kernel();
  87
  88         switch (orig) {
  89         case 0:
  90                 file->f_pos = offset;
  91                 ret = file->f_pos;
  92                 break;
  93         case 1:
  94                 file->f_pos += offset;
  95                 ret = file->f_pos;
  96                 break;
  97         case 2:
  98         default:
  99                 ret = -EINVAL;
 100         }
 101
 102         unlock_kernel();
 103         return ret;
 104 }
 105
 106 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 107 {
 108         struct dev_state *ps = (struct dev_state *)file->private_data;
 109         struct usb_device *dev = ps->dev;
 110         ssize_t ret = 0;
 111         unsigned len;
 112         loff_t pos;
 113         int i;
 114
 115         pos = *ppos;
 116         down(&dev->serialize);
 117         if (!connected(dev)) {
 118                 ret = -ENODEV;
 119                 goto err;
 120         } else if (pos < 0) {
 121                 ret = -EINVAL;
 122                 goto err;
 123         }
 124
 125         if (pos < sizeof(struct usb_device_descriptor)) {
 126                 len = sizeof(struct usb_device_descriptor) - pos;
 127                 if (len > nbytes)
 128                         len = nbytes;
 129                 if (copy_to_user(buf, ((char *)&dev->descriptor) + pos, len)) {
 130                         ret = -EFAULT;
 131                         goto err;
 132                 }
 133
 134                 *ppos += len;
 135                 buf += len;
 136                 nbytes -= len;
 137                 ret += len;
 138         }
 139
 140         pos = sizeof(struct usb_device_descriptor);
 141         for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
 142                 struct usb_config_descriptor *config =
 143                         (struct usb_config_descriptor *)dev->rawdescriptors[i];
 144                 unsigned int length = le16_to_cpu(config->wTotalLength);
 145
 146                 if (*ppos < pos + length) {
 147
 148                         /* The descriptor may claim to be longer than it
 149                          * really is.  Here is the actual allocated length. */
 150                         unsigned alloclen =
 151                                 dev->config[i].desc.wTotalLength;
 152
 153                         len = length - (*ppos - pos);
 154                         if (len > nbytes)
 155                                 len = nbytes;
 156
 157                         /* Simply don't write (skip over) unallocated parts */
 158                         if (alloclen > (*ppos - pos)) {
 159                                 alloclen -= (*ppos - pos);
 160                                 if (copy_to_user(buf,
 161                                     dev->rawdescriptors[i] + (*ppos - pos),
 162                                     min(len, alloclen))) {
 163                                         ret = -EFAULT;
 164                                         goto err;
 165                                 }
 166                         }
 167
 168                         *ppos += len;
 169                         buf += len;
 170                         nbytes -= len;
 171                         ret += len;
 172                 }
 173
 174                 pos += length;
 175         }
 176
 177 err:
 178         up(&dev->serialize);
 179         return ret;
 180 }
 181
 182 /*
 183  * async list handling
 184  */
 185
 186 static struct async *alloc_async(unsigned int numisoframes)
 187 {
 188         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
 189         struct async *as = kmalloc(assize, GFP_KERNEL);
 190         if (!as)
 191                 return NULL;
 192         memset(as, 0, assize);
 193         as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
 194         if (!as->urb) {
 195                 kfree(as);
 196                 return NULL;
 197         }
 198         return as;
 199 }
 200
 201 static void free_async(struct async *as)
 202 {
 203         if (as->urb->transfer_buffer)
 204                 kfree(as->urb->transfer_buffer);
 205         if (as->urb->setup_packet)
 206                 kfree(as->urb->setup_packet);
 207         usb_free_urb(as->urb);
 208         kfree(as);
 209 }
 210
 211 static inline void async_newpending(struct async *as)
 212 {
 213         struct dev_state *ps = as->ps;
 214         unsigned long flags;
 215
 216         spin_lock_irqsave(&ps->lock, flags);
 217         list_add_tail(&as->asynclist, &ps->async_pending);
 218         spin_unlock_irqrestore(&ps->lock, flags);
 219 }
 220
 221 static inline void async_removepending(struct async *as)
 222 {
 223         struct dev_state *ps = as->ps;
 224         unsigned long flags;
 225
 226         spin_lock_irqsave(&ps->lock, flags);
 227         list_del_init(&as->asynclist);
 228         spin_unlock_irqrestore(&ps->lock, flags);
 229 }
 230
 231 static inline struct async *async_getcompleted(struct dev_state *ps)
 232 {
 233         unsigned long flags;
 234         struct async *as = NULL;
 235
 236         spin_lock_irqsave(&ps->lock, flags);
 237         if (!list_empty(&ps->async_completed)) {
 238                 as = list_entry(ps->async_completed.next, struct async, asynclist);
 239                 list_del_init(&as->asynclist);
 240         }
 241         spin_unlock_irqrestore(&ps->lock, flags);
 242         return as;
 243 }
 244
 245 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
 246 {
 247         unsigned long flags;
 248         struct async *as;
 249
 250         spin_lock_irqsave(&ps->lock, flags);
 251         list_for_each_entry(as, &ps->async_pending, asynclist)
 252                 if (as->userurb == userurb) {
 253                         list_del_init(&as->asynclist);
 254                         spin_unlock_irqrestore(&ps->lock, flags);
 255                         return as;
 256                 }
 257         spin_unlock_irqrestore(&ps->lock, flags);
 258         return NULL;
 259 }
 260
 261 static void async_completed(struct urb *urb, struct pt_regs *regs)
 262 {
 263         struct async *as = (struct async *)urb->context;
 264         struct dev_state *ps = as->ps;
 265         struct siginfo sinfo;
 266
 267         spin_lock(&ps->lock);
 268         list_move_tail(&as->asynclist, &ps->async_completed);
 269         spin_unlock(&ps->lock);
 270         if (as->signr) {
 271                 sinfo.si_signo = as->signr;
 272                 sinfo.si_errno = as->urb->status;
 273                 sinfo.si_code = SI_ASYNCIO;
 274                 sinfo.si_addr = as->userurb;
 275                 send_sig_info(as->signr, &sinfo, as->task);
 276         }
 277         wake_up(&ps->wait);
 278 }
 279
 280 static void destroy_async (struct dev_state *ps, struct list_head *list)
 281 {
 282         struct async *as;
 283         unsigned long flags;
 284
 285         spin_lock_irqsave(&ps->lock, flags);
 286         while (!list_empty(list)) {
 287                 as = list_entry(list->next, struct async, asynclist);
 288                 list_del_init(&as->asynclist);
 289                 spin_unlock_irqrestore(&ps->lock, flags);
 290                 /* usb_unlink_urb calls the completion handler with status == -ENOENT */
 291                 usb_unlink_urb(as->urb);
 292                 spin_lock_irqsave(&ps->lock, flags);
 293         }
 294         spin_unlock_irqrestore(&ps->lock, flags);
 295         as = async_getcompleted(ps);
 296         while (as) {
 297                 free_async(as);
 298                 as = async_getcompleted(ps);
 299         }
 300 }
 301
 302 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
 303 {
 304         struct list_head *p, *q, hitlist;
 305         unsigned long flags;
 306
 307         INIT_LIST_HEAD(&hitlist);
 308         spin_lock_irqsave(&ps->lock, flags);
 309         list_for_each_safe(p, q, &ps->async_pending)
 310                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
 311                         list_move_tail(p, &hitlist);
 312         spin_unlock_irqrestore(&ps->lock, flags);
 313         destroy_async(ps, &hitlist);
 314 }
 315
 316 static inline void destroy_all_async(struct dev_state *ps)
 317 {
 318                 destroy_async(ps, &ps->async_pending);
 319 }
 320
 321 /*
 322  * interface claims are made only at the request of user level code,
 323  * which can also release them (explicitly or by closing files).
 324  * they're also undone when devices disconnect.
 325  */
 326
 327 static int driver_probe (struct usb_interface *intf,
 328                          const struct usb_device_id *id)
 329 {
 330         return -ENODEV;
 331 }
 332
 333 static void driver_disconnect(struct usb_interface *intf)
 334 {
 335         struct dev_state *ps = usb_get_intfdata (intf);
 336         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
 337
 338         if (!ps)
 339                 return;
 340
 341         /* NOTE:  this relies on usbcore having canceled and completed
 342          * all pending I/O requests; 2.6 does that.
 343          */
 344
 345         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
 346                 clear_bit(ifnum, &ps->ifclaimed);
 347         else
 348                 warn("interface number %u out of range", ifnum);
 349
 350         usb_set_intfdata (intf, NULL);
 351
 352         /* force async requests to complete */
 353         destroy_async_on_interface(ps, ifnum);
 354 }
 355
 356 struct usb_driver usbdevfs_driver = {
 357         .owner =        THIS_MODULE,
 358         .name =         "usbfs",
 359         .probe =        driver_probe,
 360         .disconnect =   driver_disconnect,
 361 };
 362
 363 static int claimintf(struct dev_state *ps, unsigned int ifnum)
 364 {
 365         struct usb_device *dev = ps->dev;
 366         struct usb_interface *intf;
 367         int err;
 368
 369         if (ifnum >= 8*sizeof(ps->ifclaimed))
 370                 return -EINVAL;
 371         /* already claimed */
 372         if (test_bit(ifnum, &ps->ifclaimed))
 373                 return 0;
 374
 375         /* lock against other changes to driver bindings */
 376         down_write(&usb_bus_type.subsys.rwsem);
 377         intf = usb_ifnum_to_if(dev, ifnum);
 378         if (!intf)
 379                 err = -ENOENT;
 380         else
 381                 err = usb_driver_claim_interface(&usbdevfs_driver, intf, ps);
 382         up_write(&usb_bus_type.subsys.rwsem);
 383         if (err == 0)
 384                 set_bit(ifnum, &ps->ifclaimed);
 385         return err;
 386 }
 387
 388 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
 389 {
 390         struct usb_device *dev;
 391         struct usb_interface *intf;
 392         int err;
 393
 394         err = -EINVAL;
 395         if (ifnum >= 8*sizeof(ps->ifclaimed))
 396                 return err;
 397         dev = ps->dev;
 398         /* lock against other changes to driver bindings */
 399         down_write(&usb_bus_type.subsys.rwsem);
 400         intf = usb_ifnum_to_if(dev, ifnum);
 401         if (!intf)
 402                 err = -ENOENT;
 403         else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
 404                 usb_driver_release_interface(&usbdevfs_driver, intf);
 405                 err = 0;
 406         }
 407         up_write(&usb_bus_type.subsys.rwsem);
 408         return err;
 409 }
 410
 411 static int checkintf(struct dev_state *ps, unsigned int ifnum)
 412 {
 413         if (ifnum >= 8*sizeof(ps->ifclaimed))
 414                 return -EINVAL;
 415         if (test_bit(ifnum, &ps->ifclaimed))
 416                 return 0;
 417         /* if not yet claimed, claim it for the driver */
 418         dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
 419                current->pid, current->comm, ifnum);
 420         return claimintf(ps, ifnum);
 421 }
 422
 423 static int findintfep(struct usb_device *dev, unsigned int ep)
 424 {
 425         unsigned int i, j, e;
 426         struct usb_interface *intf;
 427         struct usb_host_interface *alts;
 428         struct usb_endpoint_descriptor *endpt;
 429
 430         if (ep & ~(USB_DIR_IN|0xf))
 431                 return -EINVAL;
 432         if (!dev->actconfig)
 433                 return -ESRCH;
 434         for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
 435                 intf = dev->actconfig->interface[i];
 436                 for (j = 0; j < intf->num_altsetting; j++) {
 437                         alts = &intf->altsetting[j];
 438                         for (e = 0; e < alts->desc.bNumEndpoints; e++) {
 439                                 endpt = &alts->endpoint[e].desc;
 440                                 if (endpt->bEndpointAddress == ep)
 441                                         return alts->desc.bInterfaceNumber;
 442                         }
 443                 }
 444         }
 445         return -ENOENT;
 446 }
 447
 448 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
 449 {
 450         int ret = 0;
 451
 452         if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
 453                 return 0;
 454
 455         index &= 0xff;
 456         switch (requesttype & USB_RECIP_MASK) {
 457         case USB_RECIP_ENDPOINT:
 458                 if ((ret = findintfep(ps->dev, index)) >= 0)
 459                         ret = checkintf(ps, ret);
 460                 break;
 461
 462         case USB_RECIP_INTERFACE:
 463                 ret = checkintf(ps, index);
 464                 break;
 465         }
 466         return ret;
 467 }
 468
 469 /*
 470  * file operations
 471  */
 472 static int usbdev_open(struct inode *inode, struct file *file)
 473 {
 474         struct usb_device *dev;
 475         struct dev_state *ps;
 476         int ret;
 477
 478         /*
 479          * no locking necessary here, as chrdev_open has the kernel lock
 480          * (still acquire the kernel lock for safety)
 481          */
 482         ret = -ENOMEM;
 483         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
 484                 goto out_nolock;
 485
 486         lock_kernel();
 487         ret = -ENOENT;
 488         dev = usb_get_dev(inode->u.generic_ip);
 489         if (!dev) {
 490                 kfree(ps);
 491                 goto out;
 492         }
 493         ret = 0;
 494         ps->dev = dev;
 495         ps->file = file;
 496         spin_lock_init(&ps->lock);
 497         INIT_LIST_HEAD(&ps->async_pending);
 498         INIT_LIST_HEAD(&ps->async_completed);
 499         init_waitqueue_head(&ps->wait);
 500         ps->discsignr = 0;
 501         ps->disctask = current;
 502         ps->disccontext = NULL;
 503         ps->ifclaimed = 0;
 504         wmb();
 505         list_add_tail(&ps->list, &dev->filelist);
 506         file->private_data = ps;
 507  out:
 508         unlock_kernel();
 509  out_nolock:
 510         return ret;
 511 }
 512
 513 static int usbdev_release(struct inode *inode, struct file *file)
 514 {
 515         struct dev_state *ps = (struct dev_state *)file->private_data;
 516         struct usb_device *dev = ps->dev;
 517         unsigned int ifnum;
 518
 519         down(&dev->serialize);
 520         list_del_init(&ps->list);
 521
 522         if (connected(dev)) {
 523                 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); ifnum++)
 524                         if (test_bit(ifnum, &ps->ifclaimed))
 525                                 releaseintf(ps, ifnum);
 526                 destroy_all_async(ps);
 527         }
 528         up(&dev->serialize);
 529         usb_put_dev(dev);
 530         ps->dev = NULL;
 531         kfree(ps);
 532         return 0;
 533 }
 534
 535 static int proc_control(struct dev_state *ps, void __user *arg)
 536 {
 537         struct usb_device *dev = ps->dev;
 538         struct usbdevfs_ctrltransfer ctrl;
 539         unsigned int tmo;
 540         unsigned char *tbuf;
 541         int i, j, ret;
 542
 543         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
 544                 return -EFAULT;
 545         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
 546                 return ret;
 547         if (ctrl.wLength > PAGE_SIZE)
 548                 return -EINVAL;
 549         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
 550                 return -ENOMEM;
 551         tmo = (ctrl.timeout * HZ + 999) / 1000;
 552         if (ctrl.bRequestType & 0x80) {
 553                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
 554                         free_page((unsigned long)tbuf);
 555                         return -EINVAL;
 556                 }
 557                 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 558                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 559
 560                 up(&dev->serialize);
 561                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 562                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 563                 down(&dev->serialize);
 564                 if ((i > 0) && ctrl.wLength) {
 565                         if (usbfs_snoop) {
 566                                 dev_info(&dev->dev, "control read: data ");
 567                                 for (j = 0; j < ctrl.wLength; ++j)
 568                                         printk ("%02x ", (unsigned char)(tbuf)[j]);
 569                                 printk("\n");
 570                         }
 571                         if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) {
 572                                 free_page((unsigned long)tbuf);
 573                                 return -EFAULT;
 574                         }
 575                 }
 576         } else {
 577                 if (ctrl.wLength) {
 578                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
 579                                 free_page((unsigned long)tbuf);
 580                                 return -EFAULT;
 581                         }
 582                 }
 583                 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 584                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 585                 if (usbfs_snoop) {
 586                         dev_info(&dev->dev, "control write: data: ");
 587                         for (j = 0; j < ctrl.wLength; ++j)
 588                                 printk ("%02x ", (unsigned char)(tbuf)[j]);
 589                         printk("\n");
 590                 }
 591                 up(&dev->serialize);
 592                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 593                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 594                 down(&dev->serialize);
 595         }
 596         free_page((unsigned long)tbuf);
 597         if (i<0) {
 598                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
 599                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
 600                            current->comm, ctrl.bRequestType, ctrl.bRequest,
 601                            ctrl.wLength, i);
 602         }
 603         return i;
 604 }
 605
 606 static int proc_bulk(struct dev_state *ps, void __user *arg)
 607 {
 608         struct usb_device *dev = ps->dev;
 609         struct usbdevfs_bulktransfer bulk;
 610         unsigned int tmo, len1, pipe;
 611         int len2;
 612         unsigned char *tbuf;
 613         int i, ret;
 614
 615         if (copy_from_user(&bulk, arg, sizeof(bulk)))
 616                 return -EFAULT;
 617         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
 618                 return ret;
 619         if ((ret = checkintf(ps, ret)))
 620                 return ret;
 621         if (bulk.ep & USB_DIR_IN)
 622                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
 623         else
 624                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
 625         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 626                 return -EINVAL;
 627         len1 = bulk.len;
 628         if (len1 > MAX_USBFS_BUFFER_SIZE)
 629                 return -EINVAL;
 630         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
 631                 return -ENOMEM;
 632         tmo = (bulk.timeout * HZ + 999) / 1000;
 633         if (bulk.ep & 0x80) {
 634                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
 635                         kfree(tbuf);
 636                         return -EINVAL;
 637                 }
 638                 up(&dev->serialize);
 639                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 640                 down(&dev->serialize);
 641                 if (!i && len2) {
 642                         if (copy_to_user(bulk.data, tbuf, len2)) {
 643                                 kfree(tbuf);
 644                                 return -EFAULT;
 645                         }
 646                 }
 647         } else {
 648                 if (len1) {
 649                         if (copy_from_user(tbuf, bulk.data, len1)) {
 650                                 kfree(tbuf);
 651                                 return -EFAULT;
 652                         }
 653                 }
 654                 up(&dev->serialize);
 655                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 656                 down(&dev->serialize);
 657         }
 658         kfree(tbuf);
 659         if (i < 0) {
 660                 dev_warn(&dev->dev, "usbfs: USBDEVFS_BULK failed "
 661                          "ep 0x%x len %u ret %d\n", bulk.ep, bulk.len, i);
 662                 return i;
 663         }
 664         return len2;
 665 }
 666
 667 static int proc_resetep(struct dev_state *ps, void __user *arg)
 668 {
 669         unsigned int ep;
 670         int ret;
 671
 672         if (get_user(ep, (unsigned int __user *)arg))
 673                 return -EFAULT;
 674         if ((ret = findintfep(ps->dev, ep)) < 0)
 675                 return ret;
 676         if ((ret = checkintf(ps, ret)))
 677                 return ret;
 678         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
 679         return 0;
 680 }
 681
 682 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
 683 {
 684         unsigned int ep;
 685         int pipe;
 686         int ret;
 687
 688         if (get_user(ep, (unsigned int __user *)arg))
 689                 return -EFAULT;
 690         if ((ret = findintfep(ps->dev, ep)) < 0)
 691                 return ret;
 692         if ((ret = checkintf(ps, ret)))
 693                 return ret;
 694         if (ep & USB_DIR_IN)
 695                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
 696         else
 697                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
 698
 699         return usb_clear_halt(ps->dev, pipe);
 700 }
 701
 702
 703 static int proc_getdriver(struct dev_state *ps, void __user *arg)
 704 {
 705         struct usbdevfs_getdriver gd;
 706         struct usb_interface *intf;
 707         int ret;
 708
 709         if (copy_from_user(&gd, arg, sizeof(gd)))
 710                 return -EFAULT;
 711         down_read(&usb_bus_type.subsys.rwsem);
 712         intf = usb_ifnum_to_if(ps->dev, gd.interface);
 713         if (!intf || !intf->dev.driver)
 714                 ret = -ENODATA;
 715         else {
 716                 strncpy(gd.driver, intf->dev.driver->name,
 717                                 sizeof(gd.driver));
 718                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
 719         }
 720         up_read(&usb_bus_type.subsys.rwsem);
 721         return ret;
 722 }
 723
 724 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 725 {
 726         struct usbdevfs_connectinfo ci;
 727
 728         ci.devnum = ps->dev->devnum;
 729         ci.slow = ps->dev->speed == USB_SPEED_LOW;
 730         if (copy_to_user(arg, &ci, sizeof(ci)))
 731                 return -EFAULT;
 732         return 0;
 733 }
 734
 735 static int proc_resetdevice(struct dev_state *ps)
 736 {
 737         return __usb_reset_device(ps->dev);
 738
 739 }
 740
 741 static int proc_setintf(struct dev_state *ps, void __user *arg)
 742 {
 743         struct usbdevfs_setinterface setintf;
 744         int ret;
 745
 746         if (copy_from_user(&setintf, arg, sizeof(setintf)))
 747                 return -EFAULT;
 748         if ((ret = checkintf(ps, setintf.interface)))
 749                 return ret;
 750         return usb_set_interface(ps->dev, setintf.interface,
 751                         setintf.altsetting);
 752 }
 753
 754 static int proc_setconfig(struct dev_state *ps, void __user *arg)
 755 {
 756         unsigned int u;
 757         int status = 0;
 758         struct usb_host_config *actconfig;
 759
 760         if (get_user(u, (unsigned int __user *)arg))
 761                 return -EFAULT;
 762
 763         actconfig = ps->dev->actconfig;
 764
 765         /* Don't touch the device if any interfaces are claimed.
 766          * It could interfere with other drivers' operations, and if
 767          * an interface is claimed by usbfs it could easily deadlock.
 768          */
 769         if (actconfig) {
 770                 int i;
 771
 772                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
 773                         if (usb_interface_claimed(actconfig->interface[i])) {
 774                                 dev_warn (&ps->dev->dev,
 775                                         "usbfs: interface %d claimed "
 776                                         "while '%s' sets config #%d\n",
 777                                         actconfig->interface[i]
 778                                                 ->cur_altsetting
 779                                                 ->desc.bInterfaceNumber,
 780                                         current->comm, u);
 781 #if 0   /* FIXME:  enable in 2.6.10 or so */
 782                                 status = -EBUSY;
 783                                 break;
 784 #endif
 785                         }
 786                 }
 787         }
 788
 789         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
 790          * so avoid usb_set_configuration()'s kick to sysfs
 791          */
 792         if (status == 0) {
 793                 if (actconfig && actconfig->desc.bConfigurationValue == u)
 794                         status = usb_reset_configuration(ps->dev);
 795                 else
 796                         status = usb_set_configuration(ps->dev, u);
 797         }
 798
 799         return status;
 800 }
 801
 802 static int proc_submiturb(struct dev_state *ps, void __user *arg)
 803 {
 804         struct usbdevfs_urb uurb;
 805         struct usbdevfs_iso_packet_desc *isopkt = NULL;
 806         struct usb_endpoint_descriptor *ep_desc;
 807         struct async *as;
 808         struct usb_ctrlrequest *dr = NULL;
 809         unsigned int u, totlen, isofrmlen;
 810         int ret, interval = 0, ifnum = -1;
 811
 812         if (copy_from_user(&uurb, arg, sizeof(uurb)))
 813                 return -EFAULT;
 814         if (uurb.flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
 815                            URB_NO_FSBR|URB_ZERO_PACKET))
 816                 return -EINVAL;
 817         if (!uurb.buffer)
 818                 return -EINVAL;
 819         if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX))
 820                 return -EINVAL;
 821         if (!(uurb.type == USBDEVFS_URB_TYPE_CONTROL && (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
 822                 if ((ifnum = findintfep(ps->dev, uurb.endpoint)) < 0)
 823                         return ifnum;
 824                 if ((ret = checkintf(ps, ifnum)))
 825                         return ret;
 826         }
 827         switch(uurb.type) {
 828         case USBDEVFS_URB_TYPE_CONTROL:
 829                 if ((uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) != 0) {
 830                         if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 831                                 return -ENOENT;
 832                         if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_CONTROL)
 833                                 return -EINVAL;
 834                 }
 835                 /* min 8 byte setup packet, max arbitrary */
 836                 if (uurb.buffer_length < 8 || uurb.buffer_length > PAGE_SIZE)
 837                         return -EINVAL;
 838                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
 839                         return -ENOMEM;
 840                 if (copy_from_user(dr, uurb.buffer, 8)) {
 841                         kfree(dr);
 842                         return -EFAULT;
 843                 }
 844                 if (uurb.buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
 845                         kfree(dr);
 846                         return -EINVAL;
 847                 }
 848                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
 849                         kfree(dr);
 850                         return ret;
 851                 }
 852                 uurb.endpoint = (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
 853                 uurb.number_of_packets = 0;
 854                 uurb.buffer_length = le16_to_cpup(&dr->wLength);
 855                 uurb.buffer += 8;
 856                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length)) {
 857                         kfree(dr);
 858                         return -EFAULT;
 859                 }
 860                 break;
 861
 862         case USBDEVFS_URB_TYPE_BULK:
 863                 uurb.number_of_packets = 0;
 864                 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
 865                         return -EINVAL;
 866                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 867                         return -EFAULT;
 868                 break;
 869
 870         case USBDEVFS_URB_TYPE_ISO:
 871                 /* arbitrary limit */
 872                 if (uurb.number_of_packets < 1 || uurb.number_of_packets > 128)
 873                         return -EINVAL;
 874                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 875                         return -ENOENT;
 876                 interval = 1 << min (15, ep_desc->bInterval - 1);
 877                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb.number_of_packets;
 878                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
 879                         return -ENOMEM;
 880                 if (copy_from_user(isopkt, &((struct usbdevfs_urb __user *)arg)->iso_frame_desc, isofrmlen)) {
 881                         kfree(isopkt);
 882                         return -EFAULT;
 883                 }
 884                 for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 885                         if (isopkt[u].length > 1023) {
 886                                 kfree(isopkt);
 887                                 return -EINVAL;
 888                         }
 889                         totlen += isopkt[u].length;
 890                 }
 891                 if (totlen > 32768) {
 892                         kfree(isopkt);
 893                         return -EINVAL;
 894                 }
 895                 uurb.buffer_length = totlen;
 896                 break;
 897
 898         case USBDEVFS_URB_TYPE_INTERRUPT:
 899                 uurb.number_of_packets = 0;
 900                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 901                         return -ENOENT;
 902                 if (ps->dev->speed == USB_SPEED_HIGH)
 903                         interval = 1 << min (15, ep_desc->bInterval - 1);
 904                 else
 905                         interval = ep_desc->bInterval;
 906                 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
 907                         return -EINVAL;
 908                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 909                         return -EFAULT;
 910                 break;
 911
 912         default:
 913                 return -EINVAL;
 914         }
 915         if (!(as = alloc_async(uurb.number_of_packets))) {
 916                 if (isopkt)
 917                         kfree(isopkt);
 918                 if (dr)
 919                         kfree(dr);
 920                 return -ENOMEM;
 921         }
 922         if (!(as->urb->transfer_buffer = kmalloc(uurb.buffer_length, GFP_KERNEL))) {
 923                 if (isopkt)
 924                         kfree(isopkt);
 925                 if (dr)
 926                         kfree(dr);
 927                 free_async(as);
 928                 return -ENOMEM;
 929         }
 930         as->urb->dev = ps->dev;
 931         as->urb->pipe = (uurb.type << 30) | __create_pipe(ps->dev, uurb.endpoint & 0xf) | (uurb.endpoint & USB_DIR_IN);
 932         as->urb->transfer_flags = uurb.flags;
 933         as->urb->transfer_buffer_length = uurb.buffer_length;
 934         as->urb->setup_packet = (unsigned char*)dr;
 935         as->urb->start_frame = uurb.start_frame;
 936         as->urb->number_of_packets = uurb.number_of_packets;
 937         as->urb->interval = interval;
 938         as->urb->context = as;
 939         as->urb->complete = async_completed;
 940         for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 941                 as->urb->iso_frame_desc[u].offset = totlen;
 942                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
 943                 totlen += isopkt[u].length;
 944         }
 945         if (isopkt)
 946                 kfree(isopkt);
 947         as->ps = ps;
 948         as->userurb = arg;
 949         if (uurb.endpoint & USB_DIR_IN)
 950                 as->userbuffer = uurb.buffer;
 951         else
 952                 as->userbuffer = NULL;
 953         as->signr = uurb.signr;
 954         as->ifnum = ifnum;
 955         as->task = current;
 956         if (!(uurb.endpoint & USB_DIR_IN)) {
 957                 if (copy_from_user(as->urb->transfer_buffer, uurb.buffer, as->urb->transfer_buffer_length)) {
 958                         free_async(as);
 959                         return -EFAULT;
 960                 }
 961         }
 962         async_newpending(as);
 963         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
 964                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
 965                 async_removepending(as);
 966                 free_async(as);
 967                 return ret;
 968         }
 969         return 0;
 970 }
 971
 972 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
 973 {
 974         struct async *as;
 975
 976         as = async_getpending(ps, arg);
 977         if (!as)
 978                 return -EINVAL;
 979         usb_unlink_urb(as->urb);
 980         return 0;
 981 }
 982
 983 static int processcompl(struct async *as)
 984 {
 985         struct urb *urb = as->urb;
 986         struct usbdevfs_urb __user *userurb = as->userurb;
 987         unsigned int i;
 988
 989         if (as->userbuffer)
 990                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
 991                         return -EFAULT;
 992         if (put_user(urb->status, &userurb->status))
 993                 return -EFAULT;
 994         if (put_user(urb->actual_length, &userurb->actual_length))
 995                 return -EFAULT;
 996         if (put_user(urb->error_count, &userurb->error_count))
 997                 return -EFAULT;
 998
 999         if (!(usb_pipeisoc(urb->pipe)))
1000                 return 0;
1001         for (i = 0; i < urb->number_of_packets; i++) {
1002                 if (put_user(urb->iso_frame_desc[i].actual_length,
1003                              &userurb->iso_frame_desc[i].actual_length))
1004                         return -EFAULT;
1005                 if (put_user(urb->iso_frame_desc[i].status,
1006                              &userurb->iso_frame_desc[i].status))
1007                         return -EFAULT;
1008         }
1009         return 0;
1010 }
1011
1012 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1013 {
1014         DECLARE_WAITQUEUE(wait, current);
1015         struct async *as = NULL;
1016         void __user *addr;
1017         struct usb_device *dev = ps->dev;
1018         int ret;
1019
1020         add_wait_queue(&ps->wait, &wait);
1021         while (connected(dev)) {
1022                 __set_current_state(TASK_INTERRUPTIBLE);
1023                 if ((as = async_getcompleted(ps)))
1024                         break;
1025                 if (signal_pending(current))
1026                         break;
1027                 up(&dev->serialize);
1028                 schedule();
1029                 down(&dev->serialize);
1030         }
1031         remove_wait_queue(&ps->wait, &wait);
1032         set_current_state(TASK_RUNNING);
1033         if (as) {
1034                 ret = processcompl(as);
1035                 addr = as->userurb;
1036                 free_async(as);
1037                 if (ret)
1038                         return ret;
1039                 if (put_user(addr, (void __user * __user *)arg))
1040                         return -EFAULT;
1041                 return 0;
1042         }
1043         if (signal_pending(current))
1044                 return -EINTR;
1045         return -EIO;
1046 }
1047
1048 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1049 {
1050         struct async *as;
1051         void __user *addr;
1052         int ret;
1053
1054         if (!(as = async_getcompleted(ps)))
1055                 return -EAGAIN;
1056         ret = processcompl(as);
1057         addr = as->userurb;
1058         free_async(as);
1059         if (ret)
1060                 return ret;
1061         if (put_user(addr, (void __user * __user *)arg))
1062                 return -EFAULT;
1063         return 0;
1064 }
1065
1066 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1067 {
1068         struct usbdevfs_disconnectsignal ds;
1069
1070         if (copy_from_user(&ds, arg, sizeof(ds)))
1071                 return -EFAULT;
1072         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1073                 return -EINVAL;
1074         ps->discsignr = ds.signr;
1075         ps->disccontext = ds.context;
1076         return 0;
1077 }
1078
1079 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1080 {
1081         unsigned int ifnum;
1082
1083         if (get_user(ifnum, (unsigned int __user *)arg))
1084                 return -EFAULT;
1085         return claimintf(ps, ifnum);
1086 }
1087
1088 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1089 {
1090         unsigned int ifnum;
1091         int ret;
1092
1093         if (get_user(ifnum, (unsigned int __user *)arg))
1094                 return -EFAULT;
1095         if ((ret = releaseintf(ps, ifnum)) < 0)
1096                 return ret;
1097         destroy_async_on_interface (ps, ifnum);
1098         return 0;
1099 }
1100
1101 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1102 {
1103         struct usbdevfs_ioctl   ctrl;
1104         int                     size;
1105         void                    *buf = NULL;
1106         int                     retval = 0;
1107         struct usb_interface    *intf = NULL;
1108         struct usb_driver       *driver = NULL;
1109
1110         /* get input parameters and alloc buffer */
1111         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1112                 return -EFAULT;
1113         if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1114                 if ((buf = kmalloc (size, GFP_KERNEL)) == 0)
1115                         return -ENOMEM;
1116                 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1117                         if (copy_from_user (buf, ctrl.data, size)) {
1118                                 kfree (buf);
1119                                 return -EFAULT;
1120                         }
1121                 } else {
1122                         memset (buf, 0, size);
1123                 }
1124         }
1125
1126         if (!connected(ps->dev)) {
1127                 if (buf)
1128                         kfree(buf);
1129                 return -ENODEV;
1130         }
1131
1132         if (ps->dev->state != USB_STATE_CONFIGURED)
1133                 retval = -ENODEV;
1134         else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1135                retval = -EINVAL;
1136         else switch (ctrl.ioctl_code) {
1137
1138         /* disconnect kernel driver from interface */
1139         case USBDEVFS_DISCONNECT:
1140                 down_write(&usb_bus_type.subsys.rwsem);
1141                 if (intf->dev.driver) {
1142                         driver = to_usb_driver(intf->dev.driver);
1143                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1144                         usb_driver_release_interface(driver, intf);
1145                 } else
1146                         retval = -ENODATA;
1147                 up_write(&usb_bus_type.subsys.rwsem);
1148                 break;
1149
1150         /* let kernel drivers try to (re)bind to the interface */
1151         case USBDEVFS_CONNECT:
1152                 bus_rescan_devices(intf->dev.bus);
1153                 break;
1154
1155         /* talk directly to the interface's driver */
1156         default:
1157                 down_read(&usb_bus_type.subsys.rwsem);
1158                 if (intf->dev.driver)
1159                         driver = to_usb_driver(intf->dev.driver);
1160                 if (driver == 0 || driver->ioctl == 0) {
1161                         retval = -ENOTTY;
1162                 } else {
1163                         retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1164                         if (retval == -ENOIOCTLCMD)
1165                                 retval = -ENOTTY;
1166                 }
1167                 up_read(&usb_bus_type.subsys.rwsem);
1168         }
1169
1170         /* cleanup and return */
1171         if (retval >= 0
1172                         && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1173                         && size > 0
1174                         && copy_to_user (ctrl.data, buf, size) != 0)
1175                 retval = -EFAULT;
1176         if (buf != 0)
1177                 kfree (buf);
1178         return retval;
1179 }
1180
1181 /*
1182  * NOTE:  All requests here that have interface numbers as parameters
1183  * are assuming that somehow the configuration has been prevented from
1184  * changing.  But there's no mechanism to ensure that...
1185  */
1186 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1187 {
1188         struct dev_state *ps = (struct dev_state *)file->private_data;
1189         struct usb_device *dev = ps->dev;
1190         void __user *p = (void __user *)arg;
1191         int ret = -ENOTTY;
1192
1193         if (!(file->f_mode & FMODE_WRITE))
1194                 return -EPERM;
1195         down(&dev->serialize);
1196         if (!connected(dev)) {
1197                 up(&dev->serialize);
1198                 return -ENODEV;
1199         }
1200
1201         switch (cmd) {
1202         case USBDEVFS_CONTROL:
1203                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1204                 ret = proc_control(ps, p);
1205                 if (ret >= 0)
1206                         inode->i_mtime = CURRENT_TIME;
1207                 break;
1208
1209         case USBDEVFS_BULK:
1210                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1211                 ret = proc_bulk(ps, p);
1212                 if (ret >= 0)
1213                         inode->i_mtime = CURRENT_TIME;
1214                 break;
1215
1216         case USBDEVFS_RESETEP:
1217                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1218                 ret = proc_resetep(ps, p);
1219                 if (ret >= 0)
1220                         inode->i_mtime = CURRENT_TIME;
1221                 break;
1222
1223         case USBDEVFS_RESET:
1224                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1225                 ret = proc_resetdevice(ps);
1226                 break;
1227
1228         case USBDEVFS_CLEAR_HALT:
1229                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1230                 ret = proc_clearhalt(ps, p);
1231                 if (ret >= 0)
1232                         inode->i_mtime = CURRENT_TIME;
1233                 break;
1234
1235         case USBDEVFS_GETDRIVER:
1236                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1237                 ret = proc_getdriver(ps, p);
1238                 break;
1239
1240         case USBDEVFS_CONNECTINFO:
1241                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1242                 ret = proc_connectinfo(ps, p);
1243                 break;
1244
1245         case USBDEVFS_SETINTERFACE:
1246                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1247                 ret = proc_setintf(ps, p);
1248                 break;
1249
1250         case USBDEVFS_SETCONFIGURATION:
1251                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1252                 ret = proc_setconfig(ps, p);
1253                 break;
1254
1255         case USBDEVFS_SUBMITURB:
1256                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1257                 ret = proc_submiturb(ps, p);
1258                 if (ret >= 0)
1259                         inode->i_mtime = CURRENT_TIME;
1260                 break;
1261
1262         case USBDEVFS_DISCARDURB:
1263                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1264                 ret = proc_unlinkurb(ps, p);
1265                 break;
1266
1267         case USBDEVFS_REAPURB:
1268                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1269                 ret = proc_reapurb(ps, p);
1270                 break;
1271
1272         case USBDEVFS_REAPURBNDELAY:
1273                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1274                 ret = proc_reapurbnonblock(ps, p);
1275                 break;
1276
1277         case USBDEVFS_DISCSIGNAL:
1278                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1279                 ret = proc_disconnectsignal(ps, p);
1280                 break;
1281
1282         case USBDEVFS_CLAIMINTERFACE:
1283                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1284                 ret = proc_claiminterface(ps, p);
1285                 break;
1286
1287         case USBDEVFS_RELEASEINTERFACE:
1288                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1289                 ret = proc_releaseinterface(ps, p);
1290                 break;
1291
1292         case USBDEVFS_IOCTL:
1293                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1294                 ret = proc_ioctl(ps, p);
1295                 break;
1296         }
1297         up(&dev->serialize);
1298         if (ret >= 0)
1299                 inode->i_atime = CURRENT_TIME;
1300         return ret;
1301 }
1302
1303 /* No kernel lock - fine */
1304 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1305 {
1306         struct dev_state *ps = (struct dev_state *)file->private_data;
1307         unsigned int mask = 0;
1308
1309         poll_wait(file, &ps->wait, wait);
1310         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1311                 mask |= POLLOUT | POLLWRNORM;
1312         if (!connected(ps->dev))
1313                 mask |= POLLERR | POLLHUP;
1314         return mask;
1315 }
1316
1317 struct file_operations usbdevfs_device_file_operations = {
1318         .llseek =       usbdev_lseek,
1319         .read =         usbdev_read,
1320         .poll =         usbdev_poll,
1321         .ioctl =        usbdev_ioctl,
1322         .open =         usbdev_open,
1323         .release =      usbdev_release,
1324 };