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 usbfs/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         usb_lock_device(dev);
 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         usb_unlock_device(dev);
 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
 290                 /* drop the spinlock so the completion handler can run */
 291                 spin_unlock_irqrestore(&ps->lock, flags);
 292                 usb_kill_urb(as->urb);
 293                 spin_lock_irqsave(&ps->lock, flags);
 294         }
 295         spin_unlock_irqrestore(&ps->lock, flags);
 296         as = async_getcompleted(ps);
 297         while (as) {
 298                 free_async(as);
 299                 as = async_getcompleted(ps);
 300         }
 301 }
 302
 303 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
 304 {
 305         struct list_head *p, *q, hitlist;
 306         unsigned long flags;
 307
 308         INIT_LIST_HEAD(&hitlist);
 309         spin_lock_irqsave(&ps->lock, flags);
 310         list_for_each_safe(p, q, &ps->async_pending)
 311                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
 312                         list_move_tail(p, &hitlist);
 313         spin_unlock_irqrestore(&ps->lock, flags);
 314         destroy_async(ps, &hitlist);
 315 }
 316
 317 static inline void destroy_all_async(struct dev_state *ps)
 318 {
 319                 destroy_async(ps, &ps->async_pending);
 320 }
 321
 322 /*
 323  * interface claims are made only at the request of user level code,
 324  * which can also release them (explicitly or by closing files).
 325  * they're also undone when devices disconnect.
 326  */
 327
 328 static int driver_probe (struct usb_interface *intf,
 329                          const struct usb_device_id *id)
 330 {
 331         return -ENODEV;
 332 }
 333
 334 static void driver_disconnect(struct usb_interface *intf)
 335 {
 336         struct dev_state *ps = usb_get_intfdata (intf);
 337         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
 338
 339         if (!ps)
 340                 return;
 341
 342         /* NOTE:  this relies on usbcore having canceled and completed
 343          * all pending I/O requests; 2.6 does that.
 344          */
 345
 346         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
 347                 clear_bit(ifnum, &ps->ifclaimed);
 348         else
 349                 warn("interface number %u out of range", ifnum);
 350
 351         usb_set_intfdata (intf, NULL);
 352
 353         /* force async requests to complete */
 354         destroy_async_on_interface(ps, ifnum);
 355 }
 356
 357 struct usb_driver usbfs_driver = {
 358         .owner =        THIS_MODULE,
 359         .name =         "usbfs",
 360         .probe =        driver_probe,
 361         .disconnect =   driver_disconnect,
 362 };
 363
 364 static int claimintf(struct dev_state *ps, unsigned int ifnum)
 365 {
 366         struct usb_device *dev = ps->dev;
 367         struct usb_interface *intf;
 368         int err;
 369
 370         if (ifnum >= 8*sizeof(ps->ifclaimed))
 371                 return -EINVAL;
 372         /* already claimed */
 373         if (test_bit(ifnum, &ps->ifclaimed))
 374                 return 0;
 375
 376         /* lock against other changes to driver bindings */
 377         down_write(&usb_bus_type.subsys.rwsem);
 378         intf = usb_ifnum_to_if(dev, ifnum);
 379         if (!intf)
 380                 err = -ENOENT;
 381         else
 382                 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
 383         up_write(&usb_bus_type.subsys.rwsem);
 384         if (err == 0)
 385                 set_bit(ifnum, &ps->ifclaimed);
 386         return err;
 387 }
 388
 389 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
 390 {
 391         struct usb_device *dev;
 392         struct usb_interface *intf;
 393         int err;
 394
 395         err = -EINVAL;
 396         if (ifnum >= 8*sizeof(ps->ifclaimed))
 397                 return err;
 398         dev = ps->dev;
 399         /* lock against other changes to driver bindings */
 400         down_write(&usb_bus_type.subsys.rwsem);
 401         intf = usb_ifnum_to_if(dev, ifnum);
 402         if (!intf)
 403                 err = -ENOENT;
 404         else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
 405                 usb_driver_release_interface(&usbfs_driver, intf);
 406                 err = 0;
 407         }
 408         up_write(&usb_bus_type.subsys.rwsem);
 409         return err;
 410 }
 411
 412 static int checkintf(struct dev_state *ps, unsigned int ifnum)
 413 {
 414         if (ps->dev->state != USB_STATE_CONFIGURED)
 415                 return -EHOSTUNREACH;
 416         if (ifnum >= 8*sizeof(ps->ifclaimed))
 417                 return -EINVAL;
 418         if (test_bit(ifnum, &ps->ifclaimed))
 419                 return 0;
 420         /* if not yet claimed, claim it for the driver */
 421         dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
 422                current->pid, current->comm, ifnum);
 423         return claimintf(ps, ifnum);
 424 }
 425
 426 static int findintfep(struct usb_device *dev, unsigned int ep)
 427 {
 428         unsigned int i, j, e;
 429         struct usb_interface *intf;
 430         struct usb_host_interface *alts;
 431         struct usb_endpoint_descriptor *endpt;
 432
 433         if (ep & ~(USB_DIR_IN|0xf))
 434                 return -EINVAL;
 435         if (!dev->actconfig)
 436                 return -ESRCH;
 437         for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
 438                 intf = dev->actconfig->interface[i];
 439                 for (j = 0; j < intf->num_altsetting; j++) {
 440                         alts = &intf->altsetting[j];
 441                         for (e = 0; e < alts->desc.bNumEndpoints; e++) {
 442                                 endpt = &alts->endpoint[e].desc;
 443                                 if (endpt->bEndpointAddress == ep)
 444                                         return alts->desc.bInterfaceNumber;
 445                         }
 446                 }
 447         }
 448         return -ENOENT;
 449 }
 450
 451 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
 452 {
 453         int ret = 0;
 454
 455         if (ps->dev->state != USB_STATE_CONFIGURED)
 456                 return -EHOSTUNREACH;
 457         if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
 458                 return 0;
 459
 460         index &= 0xff;
 461         switch (requesttype & USB_RECIP_MASK) {
 462         case USB_RECIP_ENDPOINT:
 463                 if ((ret = findintfep(ps->dev, index)) >= 0)
 464                         ret = checkintf(ps, ret);
 465                 break;
 466
 467         case USB_RECIP_INTERFACE:
 468                 ret = checkintf(ps, index);
 469                 break;
 470         }
 471         return ret;
 472 }
 473
 474 /*
 475  * file operations
 476  */
 477 static int usbdev_open(struct inode *inode, struct file *file)
 478 {
 479         struct usb_device *dev;
 480         struct dev_state *ps;
 481         int ret;
 482
 483         /*
 484          * no locking necessary here, as chrdev_open has the kernel lock
 485          * (still acquire the kernel lock for safety)
 486          */
 487         ret = -ENOMEM;
 488         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
 489                 goto out_nolock;
 490
 491         lock_kernel();
 492         ret = -ENOENT;
 493         dev = usb_get_dev(inode->u.generic_ip);
 494         if (!dev) {
 495                 kfree(ps);
 496                 goto out;
 497         }
 498         ret = 0;
 499         ps->dev = dev;
 500         ps->file = file;
 501         spin_lock_init(&ps->lock);
 502         INIT_LIST_HEAD(&ps->async_pending);
 503         INIT_LIST_HEAD(&ps->async_completed);
 504         init_waitqueue_head(&ps->wait);
 505         ps->discsignr = 0;
 506         ps->disctask = current;
 507         ps->disccontext = NULL;
 508         ps->ifclaimed = 0;
 509         wmb();
 510         list_add_tail(&ps->list, &dev->filelist);
 511         file->private_data = ps;
 512  out:
 513         unlock_kernel();
 514  out_nolock:
 515         return ret;
 516 }
 517
 518 static int usbdev_release(struct inode *inode, struct file *file)
 519 {
 520         struct dev_state *ps = (struct dev_state *)file->private_data;
 521         struct usb_device *dev = ps->dev;
 522         unsigned int ifnum;
 523
 524         usb_lock_device(dev);
 525         list_del_init(&ps->list);
 526         for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
 527                         ifnum++) {
 528                 if (test_bit(ifnum, &ps->ifclaimed))
 529                         releaseintf(ps, ifnum);
 530         }
 531         destroy_all_async(ps);
 532         usb_unlock_device(dev);
 533         usb_put_dev(dev);
 534         ps->dev = NULL;
 535         kfree(ps);
 536         return 0;
 537 }
 538
 539 static int proc_control(struct dev_state *ps, void __user *arg)
 540 {
 541         struct usb_device *dev = ps->dev;
 542         struct usbdevfs_ctrltransfer ctrl;
 543         unsigned int tmo;
 544         unsigned char *tbuf;
 545         int i, j, ret;
 546
 547         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
 548                 return -EFAULT;
 549         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
 550                 return ret;
 551         if (ctrl.wLength > PAGE_SIZE)
 552                 return -EINVAL;
 553         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
 554                 return -ENOMEM;
 555         tmo = (ctrl.timeout * HZ + 999) / 1000;
 556         if (ctrl.bRequestType & 0x80) {
 557                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
 558                         free_page((unsigned long)tbuf);
 559                         return -EINVAL;
 560                 }
 561                 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 562                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 563
 564                 usb_unlock_device(dev);
 565                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 566                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 567                 usb_lock_device(dev);
 568                 if ((i > 0) && ctrl.wLength) {
 569                         if (usbfs_snoop) {
 570                                 dev_info(&dev->dev, "control read: data ");
 571                                 for (j = 0; j < ctrl.wLength; ++j)
 572                                         printk ("%02x ", (unsigned char)(tbuf)[j]);
 573                                 printk("\n");
 574                         }
 575                         if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) {
 576                                 free_page((unsigned long)tbuf);
 577                                 return -EFAULT;
 578                         }
 579                 }
 580         } else {
 581                 if (ctrl.wLength) {
 582                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
 583                                 free_page((unsigned long)tbuf);
 584                                 return -EFAULT;
 585                         }
 586                 }
 587                 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
 588                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
 589                 if (usbfs_snoop) {
 590                         dev_info(&dev->dev, "control write: data: ");
 591                         for (j = 0; j < ctrl.wLength; ++j)
 592                                 printk ("%02x ", (unsigned char)(tbuf)[j]);
 593                         printk("\n");
 594                 }
 595                 usb_unlock_device(dev);
 596                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 597                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 598                 usb_lock_device(dev);
 599         }
 600         free_page((unsigned long)tbuf);
 601         if (i<0 && i != -EPIPE) {
 602                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
 603                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
 604                            current->comm, ctrl.bRequestType, ctrl.bRequest,
 605                            ctrl.wLength, i);
 606         }
 607         return i;
 608 }
 609
 610 static int proc_bulk(struct dev_state *ps, void __user *arg)
 611 {
 612         struct usb_device *dev = ps->dev;
 613         struct usbdevfs_bulktransfer bulk;
 614         unsigned int tmo, len1, pipe;
 615         int len2;
 616         unsigned char *tbuf;
 617         int i, ret;
 618
 619         if (copy_from_user(&bulk, arg, sizeof(bulk)))
 620                 return -EFAULT;
 621         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
 622                 return ret;
 623         if ((ret = checkintf(ps, ret)))
 624                 return ret;
 625         if (bulk.ep & USB_DIR_IN)
 626                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
 627         else
 628                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
 629         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 630                 return -EINVAL;
 631         len1 = bulk.len;
 632         if (len1 > MAX_USBFS_BUFFER_SIZE)
 633                 return -EINVAL;
 634         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
 635                 return -ENOMEM;
 636         tmo = (bulk.timeout * HZ + 999) / 1000;
 637         if (bulk.ep & 0x80) {
 638                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
 639                         kfree(tbuf);
 640                         return -EINVAL;
 641                 }
 642                 usb_unlock_device(dev);
 643                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 644                 usb_lock_device(dev);
 645                 if (!i && len2) {
 646                         if (copy_to_user(bulk.data, tbuf, len2)) {
 647                                 kfree(tbuf);
 648                                 return -EFAULT;
 649                         }
 650                 }
 651         } else {
 652                 if (len1) {
 653                         if (copy_from_user(tbuf, bulk.data, len1)) {
 654                                 kfree(tbuf);
 655                                 return -EFAULT;
 656                         }
 657                 }
 658                 usb_unlock_device(dev);
 659                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 660                 usb_lock_device(dev);
 661         }
 662         kfree(tbuf);
 663         if (i < 0) {
 664                 dev_warn(&dev->dev, "usbfs: USBDEVFS_BULK failed "
 665                          "ep 0x%x len %u ret %d\n", bulk.ep, bulk.len, i);
 666                 return i;
 667         }
 668         return len2;
 669 }
 670
 671 static int proc_resetep(struct dev_state *ps, void __user *arg)
 672 {
 673         unsigned int ep;
 674         int ret;
 675
 676         if (get_user(ep, (unsigned int __user *)arg))
 677                 return -EFAULT;
 678         if ((ret = findintfep(ps->dev, ep)) < 0)
 679                 return ret;
 680         if ((ret = checkintf(ps, ret)))
 681                 return ret;
 682         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
 683         return 0;
 684 }
 685
 686 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
 687 {
 688         unsigned int ep;
 689         int pipe;
 690         int ret;
 691
 692         if (get_user(ep, (unsigned int __user *)arg))
 693                 return -EFAULT;
 694         if ((ret = findintfep(ps->dev, ep)) < 0)
 695                 return ret;
 696         if ((ret = checkintf(ps, ret)))
 697                 return ret;
 698         if (ep & USB_DIR_IN)
 699                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
 700         else
 701                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
 702
 703         return usb_clear_halt(ps->dev, pipe);
 704 }
 705
 706
 707 static int proc_getdriver(struct dev_state *ps, void __user *arg)
 708 {
 709         struct usbdevfs_getdriver gd;
 710         struct usb_interface *intf;
 711         int ret;
 712
 713         if (copy_from_user(&gd, arg, sizeof(gd)))
 714                 return -EFAULT;
 715         down_read(&usb_bus_type.subsys.rwsem);
 716         intf = usb_ifnum_to_if(ps->dev, gd.interface);
 717         if (!intf || !intf->dev.driver)
 718                 ret = -ENODATA;
 719         else {
 720                 strncpy(gd.driver, intf->dev.driver->name,
 721                                 sizeof(gd.driver));
 722                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
 723         }
 724         up_read(&usb_bus_type.subsys.rwsem);
 725         return ret;
 726 }
 727
 728 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 729 {
 730         struct usbdevfs_connectinfo ci;
 731
 732         ci.devnum = ps->dev->devnum;
 733         ci.slow = ps->dev->speed == USB_SPEED_LOW;
 734         if (copy_to_user(arg, &ci, sizeof(ci)))
 735                 return -EFAULT;
 736         return 0;
 737 }
 738
 739 static int proc_resetdevice(struct dev_state *ps)
 740 {
 741         return usb_reset_device(ps->dev);
 742
 743 }
 744
 745 static int proc_setintf(struct dev_state *ps, void __user *arg)
 746 {
 747         struct usbdevfs_setinterface setintf;
 748         int ret;
 749
 750         if (copy_from_user(&setintf, arg, sizeof(setintf)))
 751                 return -EFAULT;
 752         if ((ret = checkintf(ps, setintf.interface)))
 753                 return ret;
 754         return usb_set_interface(ps->dev, setintf.interface,
 755                         setintf.altsetting);
 756 }
 757
 758 static int proc_setconfig(struct dev_state *ps, void __user *arg)
 759 {
 760         unsigned int u;
 761         int status = 0;
 762         struct usb_host_config *actconfig;
 763
 764         if (get_user(u, (unsigned int __user *)arg))
 765                 return -EFAULT;
 766
 767         actconfig = ps->dev->actconfig;
 768
 769         /* Don't touch the device if any interfaces are claimed.
 770          * It could interfere with other drivers' operations, and if
 771          * an interface is claimed by usbfs it could easily deadlock.
 772          */
 773         if (actconfig) {
 774                 int i;
 775
 776                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
 777                         if (usb_interface_claimed(actconfig->interface[i])) {
 778                                 dev_warn (&ps->dev->dev,
 779                                         "usbfs: interface %d claimed "
 780                                         "while '%s' sets config #%d\n",
 781                                         actconfig->interface[i]
 782                                                 ->cur_altsetting
 783                                                 ->desc.bInterfaceNumber,
 784                                         current->comm, u);
 785 #if 0   /* FIXME:  enable in 2.6.10 or so */
 786                                 status = -EBUSY;
 787                                 break;
 788 #endif
 789                         }
 790                 }
 791         }
 792
 793         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
 794          * so avoid usb_set_configuration()'s kick to sysfs
 795          */
 796         if (status == 0) {
 797                 if (actconfig && actconfig->desc.bConfigurationValue == u)
 798                         status = usb_reset_configuration(ps->dev);
 799                 else
 800                         status = usb_set_configuration(ps->dev, u);
 801         }
 802
 803         return status;
 804 }
 805
 806 static int proc_submiturb(struct dev_state *ps, void __user *arg)
 807 {
 808         struct usbdevfs_urb uurb;
 809         struct usbdevfs_iso_packet_desc *isopkt = NULL;
 810         struct usb_endpoint_descriptor *ep_desc;
 811         struct async *as;
 812         struct usb_ctrlrequest *dr = NULL;
 813         unsigned int u, totlen, isofrmlen;
 814         int ret, interval = 0, ifnum = -1;
 815
 816         if (copy_from_user(&uurb, arg, sizeof(uurb)))
 817                 return -EFAULT;
 818         if (uurb.flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
 819                            URB_NO_FSBR|URB_ZERO_PACKET))
 820                 return -EINVAL;
 821         if (!uurb.buffer)
 822                 return -EINVAL;
 823         if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX))
 824                 return -EINVAL;
 825         if (!(uurb.type == USBDEVFS_URB_TYPE_CONTROL && (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
 826                 if ((ifnum = findintfep(ps->dev, uurb.endpoint)) < 0)
 827                         return ifnum;
 828                 if ((ret = checkintf(ps, ifnum)))
 829                         return ret;
 830         }
 831         switch(uurb.type) {
 832         case USBDEVFS_URB_TYPE_CONTROL:
 833                 if ((uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) != 0) {
 834                         if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 835                                 return -ENOENT;
 836                         if ((ep_desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_CONTROL)
 837                                 return -EINVAL;
 838                 }
 839                 /* min 8 byte setup packet, max arbitrary */
 840                 if (uurb.buffer_length < 8 || uurb.buffer_length > PAGE_SIZE)
 841                         return -EINVAL;
 842                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
 843                         return -ENOMEM;
 844                 if (copy_from_user(dr, uurb.buffer, 8)) {
 845                         kfree(dr);
 846                         return -EFAULT;
 847                 }
 848                 if (uurb.buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
 849                         kfree(dr);
 850                         return -EINVAL;
 851                 }
 852                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
 853                         kfree(dr);
 854                         return ret;
 855                 }
 856                 uurb.endpoint = (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
 857                 uurb.number_of_packets = 0;
 858                 uurb.buffer_length = le16_to_cpup(&dr->wLength);
 859                 uurb.buffer += 8;
 860                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length)) {
 861                         kfree(dr);
 862                         return -EFAULT;
 863                 }
 864                 break;
 865
 866         case USBDEVFS_URB_TYPE_BULK:
 867                 uurb.number_of_packets = 0;
 868                 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
 869                         return -EINVAL;
 870                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 871                         return -EFAULT;
 872                 break;
 873
 874         case USBDEVFS_URB_TYPE_ISO:
 875                 /* arbitrary limit */
 876                 if (uurb.number_of_packets < 1 || uurb.number_of_packets > 128)
 877                         return -EINVAL;
 878                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 879                         return -ENOENT;
 880                 interval = 1 << min (15, ep_desc->bInterval - 1);
 881                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb.number_of_packets;
 882                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
 883                         return -ENOMEM;
 884                 if (copy_from_user(isopkt, &((struct usbdevfs_urb __user *)arg)->iso_frame_desc, isofrmlen)) {
 885                         kfree(isopkt);
 886                         return -EFAULT;
 887                 }
 888                 for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 889                         if (isopkt[u].length > 1023) {
 890                                 kfree(isopkt);
 891                                 return -EINVAL;
 892                         }
 893                         totlen += isopkt[u].length;
 894                 }
 895                 if (totlen > 32768) {
 896                         kfree(isopkt);
 897                         return -EINVAL;
 898                 }
 899                 uurb.buffer_length = totlen;
 900                 break;
 901
 902         case USBDEVFS_URB_TYPE_INTERRUPT:
 903                 uurb.number_of_packets = 0;
 904                 if (!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
 905                         return -ENOENT;
 906                 if (ps->dev->speed == USB_SPEED_HIGH)
 907                         interval = 1 << min (15, ep_desc->bInterval - 1);
 908                 else
 909                         interval = ep_desc->bInterval;
 910                 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
 911                         return -EINVAL;
 912                 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
 913                         return -EFAULT;
 914                 break;
 915
 916         default:
 917                 return -EINVAL;
 918         }
 919         if (!(as = alloc_async(uurb.number_of_packets))) {
 920                 if (isopkt)
 921                         kfree(isopkt);
 922                 if (dr)
 923                         kfree(dr);
 924                 return -ENOMEM;
 925         }
 926         if (!(as->urb->transfer_buffer = kmalloc(uurb.buffer_length, GFP_KERNEL))) {
 927                 if (isopkt)
 928                         kfree(isopkt);
 929                 if (dr)
 930                         kfree(dr);
 931                 free_async(as);
 932                 return -ENOMEM;
 933         }
 934         as->urb->dev = ps->dev;
 935         as->urb->pipe = (uurb.type << 30) | __create_pipe(ps->dev, uurb.endpoint & 0xf) | (uurb.endpoint & USB_DIR_IN);
 936         as->urb->transfer_flags = uurb.flags;
 937         as->urb->transfer_buffer_length = uurb.buffer_length;
 938         as->urb->setup_packet = (unsigned char*)dr;
 939         as->urb->start_frame = uurb.start_frame;
 940         as->urb->number_of_packets = uurb.number_of_packets;
 941         as->urb->interval = interval;
 942         as->urb->context = as;
 943         as->urb->complete = async_completed;
 944         for (totlen = u = 0; u < uurb.number_of_packets; u++) {
 945                 as->urb->iso_frame_desc[u].offset = totlen;
 946                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
 947                 totlen += isopkt[u].length;
 948         }
 949         if (isopkt)
 950                 kfree(isopkt);
 951         as->ps = ps;
 952         as->userurb = arg;
 953         if (uurb.endpoint & USB_DIR_IN)
 954                 as->userbuffer = uurb.buffer;
 955         else
 956                 as->userbuffer = NULL;
 957         as->signr = uurb.signr;
 958         as->ifnum = ifnum;
 959         as->task = current;
 960         if (!(uurb.endpoint & USB_DIR_IN)) {
 961                 if (copy_from_user(as->urb->transfer_buffer, uurb.buffer, as->urb->transfer_buffer_length)) {
 962                         free_async(as);
 963                         return -EFAULT;
 964                 }
 965         }
 966         async_newpending(as);
 967         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
 968                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
 969                 async_removepending(as);
 970                 free_async(as);
 971                 return ret;
 972         }
 973         return 0;
 974 }
 975
 976 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
 977 {
 978         struct async *as;
 979
 980         as = async_getpending(ps, arg);
 981         if (!as)
 982                 return -EINVAL;
 983         usb_kill_urb(as->urb);
 984         return 0;
 985 }
 986
 987 static int processcompl(struct async *as)
 988 {
 989         struct urb *urb = as->urb;
 990         struct usbdevfs_urb __user *userurb = as->userurb;
 991         unsigned int i;
 992
 993         if (as->userbuffer)
 994                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
 995                         return -EFAULT;
 996         if (put_user(urb->status, &userurb->status))
 997                 return -EFAULT;
 998         if (put_user(urb->actual_length, &userurb->actual_length))
 999                 return -EFAULT;
1000         if (put_user(urb->error_count, &userurb->error_count))
1001                 return -EFAULT;
1002
1003         if (!(usb_pipeisoc(urb->pipe)))
1004                 return 0;
1005         for (i = 0; i < urb->number_of_packets; i++) {
1006                 if (put_user(urb->iso_frame_desc[i].actual_length,
1007                              &userurb->iso_frame_desc[i].actual_length))
1008                         return -EFAULT;
1009                 if (put_user(urb->iso_frame_desc[i].status,
1010                              &userurb->iso_frame_desc[i].status))
1011                         return -EFAULT;
1012         }
1013         return 0;
1014 }
1015
1016 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1017 {
1018         DECLARE_WAITQUEUE(wait, current);
1019         struct async *as = NULL;
1020         void __user *addr;
1021         struct usb_device *dev = ps->dev;
1022         int ret;
1023
1024         add_wait_queue(&ps->wait, &wait);
1025         for (;;) {
1026                 __set_current_state(TASK_INTERRUPTIBLE);
1027                 if ((as = async_getcompleted(ps)))
1028                         break;
1029                 if (signal_pending(current))
1030                         break;
1031                 usb_unlock_device(dev);
1032                 schedule();
1033                 usb_lock_device(dev);
1034         }
1035         remove_wait_queue(&ps->wait, &wait);
1036         set_current_state(TASK_RUNNING);
1037         if (as) {
1038                 ret = processcompl(as);
1039                 addr = as->userurb;
1040                 free_async(as);
1041                 if (ret)
1042                         return ret;
1043                 if (put_user(addr, (void __user * __user *)arg))
1044                         return -EFAULT;
1045                 return 0;
1046         }
1047         if (signal_pending(current))
1048                 return -EINTR;
1049         return -EIO;
1050 }
1051
1052 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1053 {
1054         struct async *as;
1055         void __user *addr;
1056         int ret;
1057
1058         if (!(as = async_getcompleted(ps)))
1059                 return -EAGAIN;
1060         ret = processcompl(as);
1061         addr = as->userurb;
1062         free_async(as);
1063         if (ret)
1064                 return ret;
1065         if (put_user(addr, (void __user * __user *)arg))
1066                 return -EFAULT;
1067         return 0;
1068 }
1069
1070 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1071 {
1072         struct usbdevfs_disconnectsignal ds;
1073
1074         if (copy_from_user(&ds, arg, sizeof(ds)))
1075                 return -EFAULT;
1076         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1077                 return -EINVAL;
1078         ps->discsignr = ds.signr;
1079         ps->disccontext = ds.context;
1080         return 0;
1081 }
1082
1083 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1084 {
1085         unsigned int ifnum;
1086
1087         if (get_user(ifnum, (unsigned int __user *)arg))
1088                 return -EFAULT;
1089         return claimintf(ps, ifnum);
1090 }
1091
1092 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1093 {
1094         unsigned int ifnum;
1095         int ret;
1096
1097         if (get_user(ifnum, (unsigned int __user *)arg))
1098                 return -EFAULT;
1099         if ((ret = releaseintf(ps, ifnum)) < 0)
1100                 return ret;
1101         destroy_async_on_interface (ps, ifnum);
1102         return 0;
1103 }
1104
1105 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1106 {
1107         struct usbdevfs_ioctl   ctrl;
1108         int                     size;
1109         void                    *buf = NULL;
1110         int                     retval = 0;
1111         struct usb_interface    *intf = NULL;
1112         struct usb_driver       *driver = NULL;
1113
1114         /* get input parameters and alloc buffer */
1115         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1116                 return -EFAULT;
1117         if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1118                 if ((buf = kmalloc (size, GFP_KERNEL)) == 0)
1119                         return -ENOMEM;
1120                 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1121                         if (copy_from_user (buf, ctrl.data, size)) {
1122                                 kfree (buf);
1123                                 return -EFAULT;
1124                         }
1125                 } else {
1126                         memset (buf, 0, size);
1127                 }
1128         }
1129
1130         if (!connected(ps->dev)) {
1131                 if (buf)
1132                         kfree(buf);
1133                 return -ENODEV;
1134         }
1135
1136         if (ps->dev->state != USB_STATE_CONFIGURED)
1137                 retval = -EHOSTUNREACH;
1138         else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1139                retval = -EINVAL;
1140         else switch (ctrl.ioctl_code) {
1141
1142         /* disconnect kernel driver from interface */
1143         case USBDEVFS_DISCONNECT:
1144                 down_write(&usb_bus_type.subsys.rwsem);
1145                 if (intf->dev.driver) {
1146                         driver = to_usb_driver(intf->dev.driver);
1147                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1148                         usb_driver_release_interface(driver, intf);
1149                 } else
1150                         retval = -ENODATA;
1151                 up_write(&usb_bus_type.subsys.rwsem);
1152                 break;
1153
1154         /* let kernel drivers try to (re)bind to the interface */
1155         case USBDEVFS_CONNECT:
1156                 usb_unlock_device(ps->dev);
1157                 usb_lock_all_devices();
1158                 bus_rescan_devices(intf->dev.bus);
1159                 usb_unlock_all_devices();
1160                 usb_lock_device(ps->dev);
1161                 break;
1162
1163         /* talk directly to the interface's driver */
1164         default:
1165                 down_read(&usb_bus_type.subsys.rwsem);
1166                 if (intf->dev.driver)
1167                         driver = to_usb_driver(intf->dev.driver);
1168                 if (driver == 0 || driver->ioctl == 0) {
1169                         retval = -ENOTTY;
1170                 } else {
1171                         retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1172                         if (retval == -ENOIOCTLCMD)
1173                                 retval = -ENOTTY;
1174                 }
1175                 up_read(&usb_bus_type.subsys.rwsem);
1176         }
1177
1178         /* cleanup and return */
1179         if (retval >= 0
1180                         && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1181                         && size > 0
1182                         && copy_to_user (ctrl.data, buf, size) != 0)
1183                 retval = -EFAULT;
1184         if (buf != 0)
1185                 kfree (buf);
1186         return retval;
1187 }
1188
1189 /*
1190  * NOTE:  All requests here that have interface numbers as parameters
1191  * are assuming that somehow the configuration has been prevented from
1192  * changing.  But there's no mechanism to ensure that...
1193  */
1194 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1195 {
1196         struct dev_state *ps = (struct dev_state *)file->private_data;
1197         struct usb_device *dev = ps->dev;
1198         void __user *p = (void __user *)arg;
1199         int ret = -ENOTTY;
1200
1201         if (!(file->f_mode & FMODE_WRITE))
1202                 return -EPERM;
1203         usb_lock_device(dev);
1204         if (!connected(dev)) {
1205                 usb_unlock_device(dev);
1206                 return -ENODEV;
1207         }
1208
1209         switch (cmd) {
1210         case USBDEVFS_CONTROL:
1211                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1212                 ret = proc_control(ps, p);
1213                 if (ret >= 0)
1214                         inode->i_mtime = CURRENT_TIME;
1215                 break;
1216
1217         case USBDEVFS_BULK:
1218                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1219                 ret = proc_bulk(ps, p);
1220                 if (ret >= 0)
1221                         inode->i_mtime = CURRENT_TIME;
1222                 break;
1223
1224         case USBDEVFS_RESETEP:
1225                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1226                 ret = proc_resetep(ps, p);
1227                 if (ret >= 0)
1228                         inode->i_mtime = CURRENT_TIME;
1229                 break;
1230
1231         case USBDEVFS_RESET:
1232                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1233                 ret = proc_resetdevice(ps);
1234                 break;
1235
1236         case USBDEVFS_CLEAR_HALT:
1237                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1238                 ret = proc_clearhalt(ps, p);
1239                 if (ret >= 0)
1240                         inode->i_mtime = CURRENT_TIME;
1241                 break;
1242
1243         case USBDEVFS_GETDRIVER:
1244                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1245                 ret = proc_getdriver(ps, p);
1246                 break;
1247
1248         case USBDEVFS_CONNECTINFO:
1249                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1250                 ret = proc_connectinfo(ps, p);
1251                 break;
1252
1253         case USBDEVFS_SETINTERFACE:
1254                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1255                 ret = proc_setintf(ps, p);
1256                 break;
1257
1258         case USBDEVFS_SETCONFIGURATION:
1259                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1260                 ret = proc_setconfig(ps, p);
1261                 break;
1262
1263         case USBDEVFS_SUBMITURB:
1264                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1265                 ret = proc_submiturb(ps, p);
1266                 if (ret >= 0)
1267                         inode->i_mtime = CURRENT_TIME;
1268                 break;
1269
1270         case USBDEVFS_DISCARDURB:
1271                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1272                 ret = proc_unlinkurb(ps, p);
1273                 break;
1274
1275         case USBDEVFS_REAPURB:
1276                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1277                 ret = proc_reapurb(ps, p);
1278                 break;
1279
1280         case USBDEVFS_REAPURBNDELAY:
1281                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1282                 ret = proc_reapurbnonblock(ps, p);
1283                 break;
1284
1285         case USBDEVFS_DISCSIGNAL:
1286                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1287                 ret = proc_disconnectsignal(ps, p);
1288                 break;
1289
1290         case USBDEVFS_CLAIMINTERFACE:
1291                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1292                 ret = proc_claiminterface(ps, p);
1293                 break;
1294
1295         case USBDEVFS_RELEASEINTERFACE:
1296                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1297                 ret = proc_releaseinterface(ps, p);
1298                 break;
1299
1300         case USBDEVFS_IOCTL:
1301                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1302                 ret = proc_ioctl(ps, p);
1303                 break;
1304         }
1305         usb_unlock_device(dev);
1306         if (ret >= 0)
1307                 inode->i_atime = CURRENT_TIME;
1308         return ret;
1309 }
1310
1311 /* No kernel lock - fine */
1312 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1313 {
1314         struct dev_state *ps = (struct dev_state *)file->private_data;
1315         unsigned int mask = 0;
1316
1317         poll_wait(file, &ps->wait, wait);
1318         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1319                 mask |= POLLOUT | POLLWRNORM;
1320         if (!connected(ps->dev))
1321                 mask |= POLLERR | POLLHUP;
1322         return mask;
1323 }
1324
1325 struct file_operations usbfs_device_file_operations = {
1326         .llseek =       usbdev_lseek,
1327         .read =         usbdev_read,
1328         .poll =         usbdev_poll,
1329         .ioctl =        usbdev_ioctl,
1330         .open =         usbdev_open,
1331         .release =      usbdev_release,
1332 };