b4265aa7d45e0c140ab650c5355952448e23cc92
[linux-3.10.git] / 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 <linux/cdev.h>
47 #include <asm/uaccess.h>
48 #include <asm/byteorder.h>
49 #include <linux/moduleparam.h>
50
51 #include "hcd.h"        /* for usbcore internals */
52 #include "usb.h"
53
54 #define USB_MAXBUS                      64
55 #define USB_DEVICE_MAX                  USB_MAXBUS * 128
56 static struct class *usb_device_class;
57
58 struct async {
59         struct list_head asynclist;
60         struct dev_state *ps;
61         struct task_struct *task;
62         unsigned int signr;
63         unsigned int ifnum;
64         void __user *userbuffer;
65         void __user *userurb;
66         struct urb *urb;
67 };
68
69 static int usbfs_snoop = 0;
70 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
71 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
72
73 #define snoop(dev, format, arg...)                              \
74         do {                                                    \
75                 if (usbfs_snoop)                                \
76                         dev_info( dev , format , ## arg);       \
77         } while (0)
78
79 #define USB_DEVICE_DEV          MKDEV(USB_DEVICE_MAJOR, 0)
80
81
82 #define MAX_USBFS_BUFFER_SIZE   16384
83
84 static inline int connected (struct usb_device *dev)
85 {
86         return dev->state != USB_STATE_NOTATTACHED;
87 }
88
89 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
90 {
91         loff_t ret;
92
93         lock_kernel();
94
95         switch (orig) {
96         case 0:
97                 file->f_pos = offset;
98                 ret = file->f_pos;
99                 break;
100         case 1:
101                 file->f_pos += offset;
102                 ret = file->f_pos;
103                 break;
104         case 2:
105         default:
106                 ret = -EINVAL;
107         }
108
109         unlock_kernel();
110         return ret;
111 }
112
113 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
114 {
115         struct dev_state *ps = (struct dev_state *)file->private_data;
116         struct usb_device *dev = ps->dev;
117         ssize_t ret = 0;
118         unsigned len;
119         loff_t pos;
120         int i;
121
122         pos = *ppos;
123         usb_lock_device(dev);
124         if (!connected(dev)) {
125                 ret = -ENODEV;
126                 goto err;
127         } else if (pos < 0) {
128                 ret = -EINVAL;
129                 goto err;
130         }
131
132         if (pos < sizeof(struct usb_device_descriptor)) {
133                 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
134                 if (!desc) {
135                         ret = -ENOMEM;
136                         goto err;
137                 }
138                 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
139                 le16_to_cpus(&desc->bcdUSB);
140                 le16_to_cpus(&desc->idVendor);
141                 le16_to_cpus(&desc->idProduct);
142                 le16_to_cpus(&desc->bcdDevice);
143
144                 len = sizeof(struct usb_device_descriptor) - pos;
145                 if (len > nbytes)
146                         len = nbytes;
147                 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
148                         kfree(desc);
149                         ret = -EFAULT;
150                         goto err;
151                 }
152                 kfree(desc);
153
154                 *ppos += len;
155                 buf += len;
156                 nbytes -= len;
157                 ret += len;
158         }
159
160         pos = sizeof(struct usb_device_descriptor);
161         for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
162                 struct usb_config_descriptor *config =
163                         (struct usb_config_descriptor *)dev->rawdescriptors[i];
164                 unsigned int length = le16_to_cpu(config->wTotalLength);
165
166                 if (*ppos < pos + length) {
167
168                         /* The descriptor may claim to be longer than it
169                          * really is.  Here is the actual allocated length. */
170                         unsigned alloclen =
171                                 le16_to_cpu(dev->config[i].desc.wTotalLength);
172
173                         len = length - (*ppos - pos);
174                         if (len > nbytes)
175                                 len = nbytes;
176
177                         /* Simply don't write (skip over) unallocated parts */
178                         if (alloclen > (*ppos - pos)) {
179                                 alloclen -= (*ppos - pos);
180                                 if (copy_to_user(buf,
181                                     dev->rawdescriptors[i] + (*ppos - pos),
182                                     min(len, alloclen))) {
183                                         ret = -EFAULT;
184                                         goto err;
185                                 }
186                         }
187
188                         *ppos += len;
189                         buf += len;
190                         nbytes -= len;
191                         ret += len;
192                 }
193
194                 pos += length;
195         }
196
197 err:
198         usb_unlock_device(dev);
199         return ret;
200 }
201
202 /*
203  * async list handling
204  */
205
206 static struct async *alloc_async(unsigned int numisoframes)
207 {
208         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
209         struct async *as = kmalloc(assize, GFP_KERNEL);
210         if (!as)
211                 return NULL;
212         memset(as, 0, assize);
213         as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
214         if (!as->urb) {
215                 kfree(as);
216                 return NULL;
217         }
218         return as;
219 }
220
221 static void free_async(struct async *as)
222 {
223         kfree(as->urb->transfer_buffer);
224         kfree(as->urb->setup_packet);
225         usb_free_urb(as->urb);
226         kfree(as);
227 }
228
229 static inline void async_newpending(struct async *as)
230 {
231         struct dev_state *ps = as->ps;
232         unsigned long flags;
233         
234         spin_lock_irqsave(&ps->lock, flags);
235         list_add_tail(&as->asynclist, &ps->async_pending);
236         spin_unlock_irqrestore(&ps->lock, flags);
237 }
238
239 static inline void async_removepending(struct async *as)
240 {
241         struct dev_state *ps = as->ps;
242         unsigned long flags;
243         
244         spin_lock_irqsave(&ps->lock, flags);
245         list_del_init(&as->asynclist);
246         spin_unlock_irqrestore(&ps->lock, flags);
247 }
248
249 static inline struct async *async_getcompleted(struct dev_state *ps)
250 {
251         unsigned long flags;
252         struct async *as = NULL;
253
254         spin_lock_irqsave(&ps->lock, flags);
255         if (!list_empty(&ps->async_completed)) {
256                 as = list_entry(ps->async_completed.next, struct async, asynclist);
257                 list_del_init(&as->asynclist);
258         }
259         spin_unlock_irqrestore(&ps->lock, flags);
260         return as;
261 }
262
263 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
264 {
265         unsigned long flags;
266         struct async *as;
267
268         spin_lock_irqsave(&ps->lock, flags);
269         list_for_each_entry(as, &ps->async_pending, asynclist)
270                 if (as->userurb == userurb) {
271                         list_del_init(&as->asynclist);
272                         spin_unlock_irqrestore(&ps->lock, flags);
273                         return as;
274                 }
275         spin_unlock_irqrestore(&ps->lock, flags);
276         return NULL;
277 }
278
279 static void async_completed(struct urb *urb, struct pt_regs *regs)
280 {
281         struct async *as = (struct async *)urb->context;
282         struct dev_state *ps = as->ps;
283         struct siginfo sinfo;
284
285         spin_lock(&ps->lock);
286         list_move_tail(&as->asynclist, &ps->async_completed);
287         spin_unlock(&ps->lock);
288         if (as->signr) {
289                 sinfo.si_signo = as->signr;
290                 sinfo.si_errno = as->urb->status;
291                 sinfo.si_code = SI_ASYNCIO;
292                 sinfo.si_addr = as->userurb;
293                 send_sig_info(as->signr, &sinfo, as->task);
294         }
295         wake_up(&ps->wait);
296 }
297
298 static void destroy_async (struct dev_state *ps, struct list_head *list)
299 {
300         struct async *as;
301         unsigned long flags;
302
303         spin_lock_irqsave(&ps->lock, flags);
304         while (!list_empty(list)) {
305                 as = list_entry(list->next, struct async, asynclist);
306                 list_del_init(&as->asynclist);
307
308                 /* drop the spinlock so the completion handler can run */
309                 spin_unlock_irqrestore(&ps->lock, flags);
310                 usb_kill_urb(as->urb);
311                 spin_lock_irqsave(&ps->lock, flags);
312         }
313         spin_unlock_irqrestore(&ps->lock, flags);
314         as = async_getcompleted(ps);
315         while (as) {
316                 free_async(as);
317                 as = async_getcompleted(ps);
318         }
319 }
320
321 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
322 {
323         struct list_head *p, *q, hitlist;
324         unsigned long flags;
325
326         INIT_LIST_HEAD(&hitlist);
327         spin_lock_irqsave(&ps->lock, flags);
328         list_for_each_safe(p, q, &ps->async_pending)
329                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
330                         list_move_tail(p, &hitlist);
331         spin_unlock_irqrestore(&ps->lock, flags);
332         destroy_async(ps, &hitlist);
333 }
334
335 static inline void destroy_all_async(struct dev_state *ps)
336 {
337                 destroy_async(ps, &ps->async_pending);
338 }
339
340 /*
341  * interface claims are made only at the request of user level code,
342  * which can also release them (explicitly or by closing files).
343  * they're also undone when devices disconnect.
344  */
345
346 static int driver_probe (struct usb_interface *intf,
347                          const struct usb_device_id *id)
348 {
349         return -ENODEV;
350 }
351
352 static void driver_disconnect(struct usb_interface *intf)
353 {
354         struct dev_state *ps = usb_get_intfdata (intf);
355         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
356
357         if (!ps)
358                 return;
359
360         /* NOTE:  this relies on usbcore having canceled and completed
361          * all pending I/O requests; 2.6 does that.
362          */
363
364         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
365                 clear_bit(ifnum, &ps->ifclaimed);
366         else
367                 warn("interface number %u out of range", ifnum);
368
369         usb_set_intfdata (intf, NULL);
370
371         /* force async requests to complete */
372         destroy_async_on_interface(ps, ifnum);
373 }
374
375 struct usb_driver usbfs_driver = {
376         .owner =        THIS_MODULE,
377         .name =         "usbfs",
378         .probe =        driver_probe,
379         .disconnect =   driver_disconnect,
380 };
381
382 static int claimintf(struct dev_state *ps, unsigned int ifnum)
383 {
384         struct usb_device *dev = ps->dev;
385         struct usb_interface *intf;
386         int err;
387
388         if (ifnum >= 8*sizeof(ps->ifclaimed))
389                 return -EINVAL;
390         /* already claimed */
391         if (test_bit(ifnum, &ps->ifclaimed))
392                 return 0;
393
394         /* lock against other changes to driver bindings */
395         down_write(&usb_bus_type.subsys.rwsem);
396         intf = usb_ifnum_to_if(dev, ifnum);
397         if (!intf)
398                 err = -ENOENT;
399         else
400                 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
401         up_write(&usb_bus_type.subsys.rwsem);
402         if (err == 0)
403                 set_bit(ifnum, &ps->ifclaimed);
404         return err;
405 }
406
407 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
408 {
409         struct usb_device *dev;
410         struct usb_interface *intf;
411         int err;
412
413         err = -EINVAL;
414         if (ifnum >= 8*sizeof(ps->ifclaimed))
415                 return err;
416         dev = ps->dev;
417         /* lock against other changes to driver bindings */
418         down_write(&usb_bus_type.subsys.rwsem);
419         intf = usb_ifnum_to_if(dev, ifnum);
420         if (!intf)
421                 err = -ENOENT;
422         else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
423                 usb_driver_release_interface(&usbfs_driver, intf);
424                 err = 0;
425         }
426         up_write(&usb_bus_type.subsys.rwsem);
427         return err;
428 }
429
430 static int checkintf(struct dev_state *ps, unsigned int ifnum)
431 {
432         if (ps->dev->state != USB_STATE_CONFIGURED)
433                 return -EHOSTUNREACH;
434         if (ifnum >= 8*sizeof(ps->ifclaimed))
435                 return -EINVAL;
436         if (test_bit(ifnum, &ps->ifclaimed))
437                 return 0;
438         /* if not yet claimed, claim it for the driver */
439         dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
440                current->pid, current->comm, ifnum);
441         return claimintf(ps, ifnum);
442 }
443
444 static int findintfep(struct usb_device *dev, unsigned int ep)
445 {
446         unsigned int i, j, e;
447         struct usb_interface *intf;
448         struct usb_host_interface *alts;
449         struct usb_endpoint_descriptor *endpt;
450
451         if (ep & ~(USB_DIR_IN|0xf))
452                 return -EINVAL;
453         if (!dev->actconfig)
454                 return -ESRCH;
455         for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
456                 intf = dev->actconfig->interface[i];
457                 for (j = 0; j < intf->num_altsetting; j++) {
458                         alts = &intf->altsetting[j];
459                         for (e = 0; e < alts->desc.bNumEndpoints; e++) {
460                                 endpt = &alts->endpoint[e].desc;
461                                 if (endpt->bEndpointAddress == ep)
462                                         return alts->desc.bInterfaceNumber;
463                         }
464                 }
465         }
466         return -ENOENT; 
467 }
468
469 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
470 {
471         int ret = 0;
472
473         if (ps->dev->state != USB_STATE_CONFIGURED)
474                 return -EHOSTUNREACH;
475         if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
476                 return 0;
477
478         index &= 0xff;
479         switch (requesttype & USB_RECIP_MASK) {
480         case USB_RECIP_ENDPOINT:
481                 if ((ret = findintfep(ps->dev, index)) >= 0)
482                         ret = checkintf(ps, ret);
483                 break;
484
485         case USB_RECIP_INTERFACE:
486                 ret = checkintf(ps, index);
487                 break;
488         }
489         return ret;
490 }
491
492 /*
493  * file operations
494  */
495 static int usbdev_open(struct inode *inode, struct file *file)
496 {
497         struct usb_device *dev = NULL;
498         struct dev_state *ps;
499         int ret;
500
501         /* 
502          * no locking necessary here, as chrdev_open has the kernel lock
503          * (still acquire the kernel lock for safety)
504          */
505         ret = -ENOMEM;
506         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
507                 goto out_nolock;
508
509         lock_kernel();
510         ret = -ENOENT;
511         /* check if we are called from a real node or usbfs */
512         if (imajor(inode) == USB_DEVICE_MAJOR)
513                 dev = usbdev_lookup_minor(iminor(inode));
514         if (!dev)
515                 dev = inode->u.generic_ip;
516         if (!dev) {
517                 kfree(ps);
518                 goto out;
519         }
520         usb_get_dev(dev);
521         ret = 0;
522         ps->dev = dev;
523         ps->file = file;
524         spin_lock_init(&ps->lock);
525         INIT_LIST_HEAD(&ps->async_pending);
526         INIT_LIST_HEAD(&ps->async_completed);
527         init_waitqueue_head(&ps->wait);
528         ps->discsignr = 0;
529         ps->disctask = current;
530         ps->disccontext = NULL;
531         ps->ifclaimed = 0;
532         wmb();
533         list_add_tail(&ps->list, &dev->filelist);
534         file->private_data = ps;
535  out:
536         unlock_kernel();
537  out_nolock:
538         return ret;
539 }
540
541 static int usbdev_release(struct inode *inode, struct file *file)
542 {
543         struct dev_state *ps = (struct dev_state *)file->private_data;
544         struct usb_device *dev = ps->dev;
545         unsigned int ifnum;
546
547         usb_lock_device(dev);
548         list_del_init(&ps->list);
549         for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
550                         ifnum++) {
551                 if (test_bit(ifnum, &ps->ifclaimed))
552                         releaseintf(ps, ifnum);
553         }
554         destroy_all_async(ps);
555         usb_unlock_device(dev);
556         usb_put_dev(dev);
557         ps->dev = NULL;
558         kfree(ps);
559         return 0;
560 }
561
562 static int proc_control(struct dev_state *ps, void __user *arg)
563 {
564         struct usb_device *dev = ps->dev;
565         struct usbdevfs_ctrltransfer ctrl;
566         unsigned int tmo;
567         unsigned char *tbuf;
568         int i, j, ret;
569
570         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
571                 return -EFAULT;
572         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
573                 return ret;
574         if (ctrl.wLength > PAGE_SIZE)
575                 return -EINVAL;
576         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
577                 return -ENOMEM;
578         tmo = ctrl.timeout;
579         if (ctrl.bRequestType & 0x80) {
580                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
581                         free_page((unsigned long)tbuf);
582                         return -EINVAL;
583                 }
584                 snoop(&dev->dev, "control read: bRequest=%02x "
585                                 "bRrequestType=%02x wValue=%04x "
586                                 "wIndex=%04x wLength=%04x\n",
587                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
588                                 ctrl.wIndex, ctrl.wLength);
589
590                 usb_unlock_device(dev);
591                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
592                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
593                 usb_lock_device(dev);
594                 if ((i > 0) && ctrl.wLength) {
595                         if (usbfs_snoop) {
596                                 dev_info(&dev->dev, "control read: data ");
597                                 for (j = 0; j < i; ++j)
598                                         printk ("%02x ", (unsigned char)(tbuf)[j]);
599                                 printk("\n");
600                         }
601                         if (copy_to_user(ctrl.data, tbuf, i)) {
602                                 free_page((unsigned long)tbuf);
603                                 return -EFAULT;
604                         }
605                 }
606         } else {
607                 if (ctrl.wLength) {
608                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
609                                 free_page((unsigned long)tbuf);
610                                 return -EFAULT;
611                         }
612                 }
613                 snoop(&dev->dev, "control write: bRequest=%02x "
614                                 "bRrequestType=%02x wValue=%04x "
615                                 "wIndex=%04x wLength=%04x\n",
616                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
617                                 ctrl.wIndex, ctrl.wLength);
618                 if (usbfs_snoop) {
619                         dev_info(&dev->dev, "control write: data: ");
620                         for (j = 0; j < ctrl.wLength; ++j)
621                                 printk ("%02x ", (unsigned char)(tbuf)[j]);
622                         printk("\n");
623                 }
624                 usb_unlock_device(dev);
625                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
626                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
627                 usb_lock_device(dev);
628         }
629         free_page((unsigned long)tbuf);
630         if (i<0 && i != -EPIPE) {
631                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
632                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
633                            current->comm, ctrl.bRequestType, ctrl.bRequest,
634                            ctrl.wLength, i);
635         }
636         return i;
637 }
638
639 static int proc_bulk(struct dev_state *ps, void __user *arg)
640 {
641         struct usb_device *dev = ps->dev;
642         struct usbdevfs_bulktransfer bulk;
643         unsigned int tmo, len1, pipe;
644         int len2;
645         unsigned char *tbuf;
646         int i, ret;
647
648         if (copy_from_user(&bulk, arg, sizeof(bulk)))
649                 return -EFAULT;
650         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
651                 return ret;
652         if ((ret = checkintf(ps, ret)))
653                 return ret;
654         if (bulk.ep & USB_DIR_IN)
655                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
656         else
657                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
658         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
659                 return -EINVAL;
660         len1 = bulk.len;
661         if (len1 > MAX_USBFS_BUFFER_SIZE)
662                 return -EINVAL;
663         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
664                 return -ENOMEM;
665         tmo = bulk.timeout;
666         if (bulk.ep & 0x80) {
667                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
668                         kfree(tbuf);
669                         return -EINVAL;
670                 }
671                 usb_unlock_device(dev);
672                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
673                 usb_lock_device(dev);
674                 if (!i && len2) {
675                         if (copy_to_user(bulk.data, tbuf, len2)) {
676                                 kfree(tbuf);
677                                 return -EFAULT;
678                         }
679                 }
680         } else {
681                 if (len1) {
682                         if (copy_from_user(tbuf, bulk.data, len1)) {
683                                 kfree(tbuf);
684                                 return -EFAULT;
685                         }
686                 }
687                 usb_unlock_device(dev);
688                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
689                 usb_lock_device(dev);
690         }
691         kfree(tbuf);
692         if (i < 0)
693                 return i;
694         return len2;
695 }
696
697 static int proc_resetep(struct dev_state *ps, void __user *arg)
698 {
699         unsigned int ep;
700         int ret;
701
702         if (get_user(ep, (unsigned int __user *)arg))
703                 return -EFAULT;
704         if ((ret = findintfep(ps->dev, ep)) < 0)
705                 return ret;
706         if ((ret = checkintf(ps, ret)))
707                 return ret;
708         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
709         return 0;
710 }
711
712 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
713 {
714         unsigned int ep;
715         int pipe;
716         int ret;
717
718         if (get_user(ep, (unsigned int __user *)arg))
719                 return -EFAULT;
720         if ((ret = findintfep(ps->dev, ep)) < 0)
721                 return ret;
722         if ((ret = checkintf(ps, ret)))
723                 return ret;
724         if (ep & USB_DIR_IN)
725                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
726         else
727                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
728
729         return usb_clear_halt(ps->dev, pipe);
730 }
731                 
732
733 static int proc_getdriver(struct dev_state *ps, void __user *arg)
734 {
735         struct usbdevfs_getdriver gd;
736         struct usb_interface *intf;
737         int ret;
738
739         if (copy_from_user(&gd, arg, sizeof(gd)))
740                 return -EFAULT;
741         down_read(&usb_bus_type.subsys.rwsem);
742         intf = usb_ifnum_to_if(ps->dev, gd.interface);
743         if (!intf || !intf->dev.driver)
744                 ret = -ENODATA;
745         else {
746                 strncpy(gd.driver, intf->dev.driver->name,
747                                 sizeof(gd.driver));
748                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
749         }
750         up_read(&usb_bus_type.subsys.rwsem);
751         return ret;
752 }
753
754 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
755 {
756         struct usbdevfs_connectinfo ci;
757
758         ci.devnum = ps->dev->devnum;
759         ci.slow = ps->dev->speed == USB_SPEED_LOW;
760         if (copy_to_user(arg, &ci, sizeof(ci)))
761                 return -EFAULT;
762         return 0;
763 }
764
765 static int proc_resetdevice(struct dev_state *ps)
766 {
767         return usb_reset_device(ps->dev);
768
769 }
770
771 static int proc_setintf(struct dev_state *ps, void __user *arg)
772 {
773         struct usbdevfs_setinterface setintf;
774         int ret;
775
776         if (copy_from_user(&setintf, arg, sizeof(setintf)))
777                 return -EFAULT;
778         if ((ret = checkintf(ps, setintf.interface)))
779                 return ret;
780         return usb_set_interface(ps->dev, setintf.interface,
781                         setintf.altsetting);
782 }
783
784 static int proc_setconfig(struct dev_state *ps, void __user *arg)
785 {
786         unsigned int u;
787         int status = 0;
788         struct usb_host_config *actconfig;
789
790         if (get_user(u, (unsigned int __user *)arg))
791                 return -EFAULT;
792
793         actconfig = ps->dev->actconfig;
794  
795         /* Don't touch the device if any interfaces are claimed.
796          * It could interfere with other drivers' operations, and if
797          * an interface is claimed by usbfs it could easily deadlock.
798          */
799         if (actconfig) {
800                 int i;
801  
802                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
803                         if (usb_interface_claimed(actconfig->interface[i])) {
804                                 dev_warn (&ps->dev->dev,
805                                         "usbfs: interface %d claimed by %s "
806                                         "while '%s' sets config #%d\n",
807                                         actconfig->interface[i]
808                                                 ->cur_altsetting
809                                                 ->desc.bInterfaceNumber,
810                                         actconfig->interface[i]
811                                                 ->dev.driver->name,
812                                         current->comm, u);
813                                 status = -EBUSY;
814                                 break;
815                         }
816                 }
817         }
818
819         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
820          * so avoid usb_set_configuration()'s kick to sysfs
821          */
822         if (status == 0) {
823                 if (actconfig && actconfig->desc.bConfigurationValue == u)
824                         status = usb_reset_configuration(ps->dev);
825                 else
826                         status = usb_set_configuration(ps->dev, u);
827         }
828
829         return status;
830 }
831
832
833 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
834                              struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
835                              void __user *arg)
836 {
837         struct usbdevfs_iso_packet_desc *isopkt = NULL;
838         struct usb_host_endpoint *ep;
839         struct async *as;
840         struct usb_ctrlrequest *dr = NULL;
841         unsigned int u, totlen, isofrmlen;
842         int ret, interval = 0, ifnum = -1;
843
844         if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
845                            URB_NO_FSBR|URB_ZERO_PACKET))
846                 return -EINVAL;
847         if (!uurb->buffer)
848                 return -EINVAL;
849         if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
850                 return -EINVAL;
851         if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
852                 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
853                         return ifnum;
854                 if ((ret = checkintf(ps, ifnum)))
855                         return ret;
856         }
857         if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
858                 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
859         else
860                 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
861         if (!ep)
862                 return -ENOENT;
863         switch(uurb->type) {
864         case USBDEVFS_URB_TYPE_CONTROL:
865                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
866                                 != USB_ENDPOINT_XFER_CONTROL)
867                         return -EINVAL;
868                 /* min 8 byte setup packet, max arbitrary */
869                 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
870                         return -EINVAL;
871                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
872                         return -ENOMEM;
873                 if (copy_from_user(dr, uurb->buffer, 8)) {
874                         kfree(dr);
875                         return -EFAULT;
876                 }
877                 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
878                         kfree(dr);
879                         return -EINVAL;
880                 }
881                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
882                         kfree(dr);
883                         return ret;
884                 }
885                 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
886                 uurb->number_of_packets = 0;
887                 uurb->buffer_length = le16_to_cpup(&dr->wLength);
888                 uurb->buffer += 8;
889                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
890                         kfree(dr);
891                         return -EFAULT;
892                 }
893                 break;
894
895         case USBDEVFS_URB_TYPE_BULK:
896                 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
897                 case USB_ENDPOINT_XFER_CONTROL:
898                 case USB_ENDPOINT_XFER_ISOC:
899                         return -EINVAL;
900                 /* allow single-shot interrupt transfers, at bogus rates */
901                 }
902                 uurb->number_of_packets = 0;
903                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
904                         return -EINVAL;
905                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
906                         return -EFAULT;
907                 break;
908
909         case USBDEVFS_URB_TYPE_ISO:
910                 /* arbitrary limit */
911                 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
912                         return -EINVAL;
913                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
914                                 != USB_ENDPOINT_XFER_ISOC)
915                         return -EINVAL;
916                 interval = 1 << min (15, ep->desc.bInterval - 1);
917                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
918                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
919                         return -ENOMEM;
920                 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
921                         kfree(isopkt);
922                         return -EFAULT;
923                 }
924                 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
925                         if (isopkt[u].length > 1023) {
926                                 kfree(isopkt);
927                                 return -EINVAL;
928                         }
929                         totlen += isopkt[u].length;
930                 }
931                 if (totlen > 32768) {
932                         kfree(isopkt);
933                         return -EINVAL;
934                 }
935                 uurb->buffer_length = totlen;
936                 break;
937
938         case USBDEVFS_URB_TYPE_INTERRUPT:
939                 uurb->number_of_packets = 0;
940                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
941                                 != USB_ENDPOINT_XFER_INT)
942                         return -EINVAL;
943                 if (ps->dev->speed == USB_SPEED_HIGH)
944                         interval = 1 << min (15, ep->desc.bInterval - 1);
945                 else
946                         interval = ep->desc.bInterval;
947                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
948                         return -EINVAL;
949                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
950                         return -EFAULT;
951                 break;
952
953         default:
954                 return -EINVAL;
955         }
956         if (!(as = alloc_async(uurb->number_of_packets))) {
957                 kfree(isopkt);
958                 kfree(dr);
959                 return -ENOMEM;
960         }
961         if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
962                 kfree(isopkt);
963                 kfree(dr);
964                 free_async(as);
965                 return -ENOMEM;
966         }
967         as->urb->dev = ps->dev;
968         as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
969         as->urb->transfer_flags = uurb->flags;
970         as->urb->transfer_buffer_length = uurb->buffer_length;
971         as->urb->setup_packet = (unsigned char*)dr;
972         as->urb->start_frame = uurb->start_frame;
973         as->urb->number_of_packets = uurb->number_of_packets;
974         as->urb->interval = interval;
975         as->urb->context = as;
976         as->urb->complete = async_completed;
977         for (totlen = u = 0; u < uurb->number_of_packets; u++) {
978                 as->urb->iso_frame_desc[u].offset = totlen;
979                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
980                 totlen += isopkt[u].length;
981         }
982         kfree(isopkt);
983         as->ps = ps;
984         as->userurb = arg;
985         if (uurb->endpoint & USB_DIR_IN)
986                 as->userbuffer = uurb->buffer;
987         else
988                 as->userbuffer = NULL;
989         as->signr = uurb->signr;
990         as->ifnum = ifnum;
991         as->task = current;
992         if (!(uurb->endpoint & USB_DIR_IN)) {
993                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
994                         free_async(as);
995                         return -EFAULT;
996                 }
997         }
998         async_newpending(as);
999         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1000                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1001                 async_removepending(as);
1002                 free_async(as);
1003                 return ret;
1004         }
1005         return 0;
1006 }
1007
1008 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1009 {
1010         struct usbdevfs_urb uurb;
1011
1012         if (copy_from_user(&uurb, arg, sizeof(uurb)))
1013                 return -EFAULT;
1014
1015         return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1016 }
1017
1018 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1019 {
1020         struct async *as;
1021
1022         as = async_getpending(ps, arg);
1023         if (!as)
1024                 return -EINVAL;
1025         usb_kill_urb(as->urb);
1026         return 0;
1027 }
1028
1029 static int processcompl(struct async *as, void __user * __user *arg)
1030 {
1031         struct urb *urb = as->urb;
1032         struct usbdevfs_urb __user *userurb = as->userurb;
1033         void __user *addr = as->userurb;
1034         unsigned int i;
1035
1036         if (as->userbuffer)
1037                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1038                         return -EFAULT;
1039         if (put_user(urb->status, &userurb->status))
1040                 return -EFAULT;
1041         if (put_user(urb->actual_length, &userurb->actual_length))
1042                 return -EFAULT;
1043         if (put_user(urb->error_count, &userurb->error_count))
1044                 return -EFAULT;
1045
1046         if (usb_pipeisoc(urb->pipe)) {
1047                 for (i = 0; i < urb->number_of_packets; i++) {
1048                         if (put_user(urb->iso_frame_desc[i].actual_length,
1049                                      &userurb->iso_frame_desc[i].actual_length))
1050                                 return -EFAULT;
1051                         if (put_user(urb->iso_frame_desc[i].status,
1052                                      &userurb->iso_frame_desc[i].status))
1053                                 return -EFAULT;
1054                 }
1055         }
1056
1057         free_async(as);
1058
1059         if (put_user(addr, (void __user * __user *)arg))
1060                 return -EFAULT;
1061         return 0;
1062 }
1063
1064 static struct async* reap_as(struct dev_state *ps)
1065 {
1066         DECLARE_WAITQUEUE(wait, current);
1067         struct async *as = NULL;
1068         struct usb_device *dev = ps->dev;
1069
1070         add_wait_queue(&ps->wait, &wait);
1071         for (;;) {
1072                 __set_current_state(TASK_INTERRUPTIBLE);
1073                 if ((as = async_getcompleted(ps)))
1074                         break;
1075                 if (signal_pending(current))
1076                         break;
1077                 usb_unlock_device(dev);
1078                 schedule();
1079                 usb_lock_device(dev);
1080         }
1081         remove_wait_queue(&ps->wait, &wait);
1082         set_current_state(TASK_RUNNING);
1083         return as;
1084 }
1085
1086 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1087 {
1088         struct async *as = reap_as(ps);
1089         if (as)
1090                 return processcompl(as, (void __user * __user *)arg);
1091         if (signal_pending(current))
1092                 return -EINTR;
1093         return -EIO;
1094 }
1095
1096 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1097 {
1098         struct async *as;
1099
1100         if (!(as = async_getcompleted(ps)))
1101                 return -EAGAIN;
1102         return processcompl(as, (void __user * __user *)arg);
1103 }
1104
1105 #ifdef CONFIG_COMPAT
1106
1107 static int get_urb32(struct usbdevfs_urb *kurb,
1108                      struct usbdevfs_urb32 __user *uurb)
1109 {
1110         __u32  uptr;
1111         if (get_user(kurb->type, &uurb->type) ||
1112             __get_user(kurb->endpoint, &uurb->endpoint) ||
1113             __get_user(kurb->status, &uurb->status) ||
1114             __get_user(kurb->flags, &uurb->flags) ||
1115             __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1116             __get_user(kurb->actual_length, &uurb->actual_length) ||
1117             __get_user(kurb->start_frame, &uurb->start_frame) ||
1118             __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1119             __get_user(kurb->error_count, &uurb->error_count) ||
1120             __get_user(kurb->signr, &uurb->signr))
1121                 return -EFAULT;
1122
1123         if (__get_user(uptr, &uurb->buffer))
1124                 return -EFAULT;
1125         kurb->buffer = compat_ptr(uptr);
1126         if (__get_user(uptr, &uurb->buffer))
1127                 return -EFAULT;
1128         kurb->usercontext = compat_ptr(uptr);
1129
1130         return 0;
1131 }
1132
1133 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1134 {
1135         struct usbdevfs_urb uurb;
1136
1137         if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1138                 return -EFAULT;
1139
1140         return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1141 }
1142
1143 static int processcompl_compat(struct async *as, void __user * __user *arg)
1144 {
1145         struct urb *urb = as->urb;
1146         struct usbdevfs_urb32 __user *userurb = as->userurb;
1147         void __user *addr = as->userurb;
1148         unsigned int i;
1149
1150         if (as->userbuffer)
1151                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1152                         return -EFAULT;
1153         if (put_user(urb->status, &userurb->status))
1154                 return -EFAULT;
1155         if (put_user(urb->actual_length, &userurb->actual_length))
1156                 return -EFAULT;
1157         if (put_user(urb->error_count, &userurb->error_count))
1158                 return -EFAULT;
1159
1160         if (usb_pipeisoc(urb->pipe)) {
1161                 for (i = 0; i < urb->number_of_packets; i++) {
1162                         if (put_user(urb->iso_frame_desc[i].actual_length,
1163                                      &userurb->iso_frame_desc[i].actual_length))
1164                                 return -EFAULT;
1165                         if (put_user(urb->iso_frame_desc[i].status,
1166                                      &userurb->iso_frame_desc[i].status))
1167                                 return -EFAULT;
1168                 }
1169         }
1170
1171         free_async(as);
1172         if (put_user((u32)(u64)addr, (u32 __user *)arg))
1173                 return -EFAULT;
1174         return 0;
1175 }
1176
1177 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1178 {
1179         struct async *as = reap_as(ps);
1180         if (as)
1181                 return processcompl_compat(as, (void __user * __user *)arg);
1182         if (signal_pending(current))
1183                 return -EINTR;
1184         return -EIO;
1185 }
1186
1187 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1188 {
1189         struct async *as;
1190
1191         if (!(as = async_getcompleted(ps)))
1192                 return -EAGAIN;
1193         return processcompl_compat(as, (void __user * __user *)arg);
1194 }
1195
1196 #endif
1197
1198 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1199 {
1200         struct usbdevfs_disconnectsignal ds;
1201
1202         if (copy_from_user(&ds, arg, sizeof(ds)))
1203                 return -EFAULT;
1204         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1205                 return -EINVAL;
1206         ps->discsignr = ds.signr;
1207         ps->disccontext = ds.context;
1208         return 0;
1209 }
1210
1211 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1212 {
1213         unsigned int ifnum;
1214
1215         if (get_user(ifnum, (unsigned int __user *)arg))
1216                 return -EFAULT;
1217         return claimintf(ps, ifnum);
1218 }
1219
1220 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1221 {
1222         unsigned int ifnum;
1223         int ret;
1224
1225         if (get_user(ifnum, (unsigned int __user *)arg))
1226                 return -EFAULT;
1227         if ((ret = releaseintf(ps, ifnum)) < 0)
1228                 return ret;
1229         destroy_async_on_interface (ps, ifnum);
1230         return 0;
1231 }
1232
1233 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1234 {
1235         struct usbdevfs_ioctl   ctrl;
1236         int                     size;
1237         void                    *buf = NULL;
1238         int                     retval = 0;
1239         struct usb_interface    *intf = NULL;
1240         struct usb_driver       *driver = NULL;
1241
1242         /* get input parameters and alloc buffer */
1243         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1244                 return -EFAULT;
1245         if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1246                 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1247                         return -ENOMEM;
1248                 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1249                         if (copy_from_user (buf, ctrl.data, size)) {
1250                                 kfree(buf);
1251                                 return -EFAULT;
1252                         }
1253                 } else {
1254                         memset (buf, 0, size);
1255                 }
1256         }
1257
1258         if (!connected(ps->dev)) {
1259                 kfree(buf);
1260                 return -ENODEV;
1261         }
1262
1263         if (ps->dev->state != USB_STATE_CONFIGURED)
1264                 retval = -EHOSTUNREACH;
1265         else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1266                retval = -EINVAL;
1267         else switch (ctrl.ioctl_code) {
1268
1269         /* disconnect kernel driver from interface */
1270         case USBDEVFS_DISCONNECT:
1271
1272                 down_write(&usb_bus_type.subsys.rwsem);
1273                 if (intf->dev.driver) {
1274                         driver = to_usb_driver(intf->dev.driver);
1275                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1276                         usb_driver_release_interface(driver, intf);
1277                 } else
1278                         retval = -ENODATA;
1279                 up_write(&usb_bus_type.subsys.rwsem);
1280                 break;
1281
1282         /* let kernel drivers try to (re)bind to the interface */
1283         case USBDEVFS_CONNECT:
1284                 usb_unlock_device(ps->dev);
1285                 usb_lock_all_devices();
1286                 bus_rescan_devices(intf->dev.bus);
1287                 usb_unlock_all_devices();
1288                 usb_lock_device(ps->dev);
1289                 break;
1290
1291         /* talk directly to the interface's driver */
1292         default:
1293                 down_read(&usb_bus_type.subsys.rwsem);
1294                 if (intf->dev.driver)
1295                         driver = to_usb_driver(intf->dev.driver);
1296                 if (driver == NULL || driver->ioctl == NULL) {
1297                         retval = -ENOTTY;
1298                 } else {
1299                         retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1300                         if (retval == -ENOIOCTLCMD)
1301                                 retval = -ENOTTY;
1302                 }
1303                 up_read(&usb_bus_type.subsys.rwsem);
1304         }
1305
1306         /* cleanup and return */
1307         if (retval >= 0
1308                         && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1309                         && size > 0
1310                         && copy_to_user (ctrl.data, buf, size) != 0)
1311                 retval = -EFAULT;
1312
1313         kfree(buf);
1314         return retval;
1315 }
1316
1317 /*
1318  * NOTE:  All requests here that have interface numbers as parameters
1319  * are assuming that somehow the configuration has been prevented from
1320  * changing.  But there's no mechanism to ensure that...
1321  */
1322 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1323 {
1324         struct dev_state *ps = (struct dev_state *)file->private_data;
1325         struct usb_device *dev = ps->dev;
1326         void __user *p = (void __user *)arg;
1327         int ret = -ENOTTY;
1328
1329         if (!(file->f_mode & FMODE_WRITE))
1330                 return -EPERM;
1331         usb_lock_device(dev);
1332         if (!connected(dev)) {
1333                 usb_unlock_device(dev);
1334                 return -ENODEV;
1335         }
1336
1337         switch (cmd) {
1338         case USBDEVFS_CONTROL:
1339                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1340                 ret = proc_control(ps, p);
1341                 if (ret >= 0)
1342                         inode->i_mtime = CURRENT_TIME;
1343                 break;
1344
1345         case USBDEVFS_BULK:
1346                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1347                 ret = proc_bulk(ps, p);
1348                 if (ret >= 0)
1349                         inode->i_mtime = CURRENT_TIME;
1350                 break;
1351
1352         case USBDEVFS_RESETEP:
1353                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1354                 ret = proc_resetep(ps, p);
1355                 if (ret >= 0)
1356                         inode->i_mtime = CURRENT_TIME;
1357                 break;
1358
1359         case USBDEVFS_RESET:
1360                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1361                 ret = proc_resetdevice(ps);
1362                 break;
1363
1364         case USBDEVFS_CLEAR_HALT:
1365                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1366                 ret = proc_clearhalt(ps, p);
1367                 if (ret >= 0)
1368                         inode->i_mtime = CURRENT_TIME;
1369                 break;
1370
1371         case USBDEVFS_GETDRIVER:
1372                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1373                 ret = proc_getdriver(ps, p);
1374                 break;
1375
1376         case USBDEVFS_CONNECTINFO:
1377                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1378                 ret = proc_connectinfo(ps, p);
1379                 break;
1380
1381         case USBDEVFS_SETINTERFACE:
1382                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1383                 ret = proc_setintf(ps, p);
1384                 break;
1385
1386         case USBDEVFS_SETCONFIGURATION:
1387                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1388                 ret = proc_setconfig(ps, p);
1389                 break;
1390
1391         case USBDEVFS_SUBMITURB:
1392                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1393                 ret = proc_submiturb(ps, p);
1394                 if (ret >= 0)
1395                         inode->i_mtime = CURRENT_TIME;
1396                 break;
1397
1398 #ifdef CONFIG_COMPAT
1399
1400         case USBDEVFS_SUBMITURB32:
1401                 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1402                 ret = proc_submiturb_compat(ps, p);
1403                 if (ret >= 0)
1404                         inode->i_mtime = CURRENT_TIME;
1405                 break;
1406
1407         case USBDEVFS_REAPURB32:
1408                 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1409                 ret = proc_reapurb_compat(ps, p);
1410                 break;
1411
1412         case USBDEVFS_REAPURBNDELAY32:
1413                 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1414                 ret = proc_reapurbnonblock_compat(ps, p);
1415                 break;
1416
1417 #endif
1418
1419         case USBDEVFS_DISCARDURB:
1420                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1421                 ret = proc_unlinkurb(ps, p);
1422                 break;
1423
1424         case USBDEVFS_REAPURB:
1425                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1426                 ret = proc_reapurb(ps, p);
1427                 break;
1428
1429         case USBDEVFS_REAPURBNDELAY:
1430                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1431                 ret = proc_reapurbnonblock(ps, p);
1432                 break;
1433
1434         case USBDEVFS_DISCSIGNAL:
1435                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1436                 ret = proc_disconnectsignal(ps, p);
1437                 break;
1438
1439         case USBDEVFS_CLAIMINTERFACE:
1440                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1441                 ret = proc_claiminterface(ps, p);
1442                 break;
1443
1444         case USBDEVFS_RELEASEINTERFACE:
1445                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1446                 ret = proc_releaseinterface(ps, p);
1447                 break;
1448
1449         case USBDEVFS_IOCTL:
1450                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1451                 ret = proc_ioctl(ps, p);
1452                 break;
1453         }
1454         usb_unlock_device(dev);
1455         if (ret >= 0)
1456                 inode->i_atime = CURRENT_TIME;
1457         return ret;
1458 }
1459
1460 /* No kernel lock - fine */
1461 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1462 {
1463         struct dev_state *ps = (struct dev_state *)file->private_data;
1464         unsigned int mask = 0;
1465
1466         poll_wait(file, &ps->wait, wait);
1467         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1468                 mask |= POLLOUT | POLLWRNORM;
1469         if (!connected(ps->dev))
1470                 mask |= POLLERR | POLLHUP;
1471         return mask;
1472 }
1473
1474 struct file_operations usbfs_device_file_operations = {
1475         .llseek =       usbdev_lseek,
1476         .read =         usbdev_read,
1477         .poll =         usbdev_poll,
1478         .ioctl =        usbdev_ioctl,
1479         .open =         usbdev_open,
1480         .release =      usbdev_release,
1481 };
1482
1483 struct usb_device *usbdev_lookup_minor(int minor)
1484 {
1485         struct class_device *class_dev;
1486         struct usb_device *dev = NULL;
1487
1488         down(&usb_device_class->sem);
1489         list_for_each_entry(class_dev, &usb_device_class->children, node) {
1490                 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
1491                         dev = class_dev->class_data;
1492                         break;
1493                 }
1494         }
1495         up(&usb_device_class->sem);
1496
1497         return dev;
1498 };
1499
1500 void usbdev_add(struct usb_device *dev)
1501 {
1502         int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1503
1504         dev->class_dev = class_device_create(usb_device_class,
1505                                 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1506                                 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1507
1508         dev->class_dev->class_data = dev;
1509 }
1510
1511 void usbdev_remove(struct usb_device *dev)
1512 {
1513         class_device_unregister(dev->class_dev);
1514 }
1515
1516 static struct cdev usb_device_cdev = {
1517         .kobj   = {.name = "usb_device", },
1518         .owner  = THIS_MODULE,
1519 };
1520
1521 int __init usbdev_init(void)
1522 {
1523         int retval;
1524
1525         retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1526                         "usb_device");
1527         if (retval) {
1528                 err("unable to register minors for usb_device");
1529                 goto out;
1530         }
1531         cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1532         retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1533         if (retval) {
1534                 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1535                 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1536                 goto out;
1537         }
1538         usb_device_class = class_create(THIS_MODULE, "usb_device");
1539         if (IS_ERR(usb_device_class)) {
1540                 err("unable to register usb_device class");
1541                 retval = PTR_ERR(usb_device_class);
1542                 usb_device_class = NULL;
1543                 cdev_del(&usb_device_cdev);
1544                 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1545         }
1546
1547 out:
1548         return retval;
1549 }
1550
1551 void usbdev_cleanup(void)
1552 {
1553         class_destroy(usb_device_class);
1554         cdev_del(&usb_device_cdev);
1555         unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1556 }
1557