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Linux v2.6.13
[linux-2.6/next.git] / drivers / usb / core / devio.c
blobf86bf1454e21e69259146c02ea543e1e2d83bfca
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 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
127 if (!desc) {
128 ret = -ENOMEM;
129 goto err;
130 }
131 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
132 le16_to_cpus(&desc->bcdUSB);
133 le16_to_cpus(&desc->idVendor);
134 le16_to_cpus(&desc->idProduct);
135 le16_to_cpus(&desc->bcdDevice);
136
137 len = sizeof(struct usb_device_descriptor) - pos;
138 if (len > nbytes)
139 len = nbytes;
140 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
141 kfree(desc);
142 ret = -EFAULT;
143 goto err;
144 }
145 kfree(desc);
146
147 *ppos += len;
148 buf += len;
149 nbytes -= len;
150 ret += len;
151 }
152
153 pos = sizeof(struct usb_device_descriptor);
154 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
155 struct usb_config_descriptor *config =
156 (struct usb_config_descriptor *)dev->rawdescriptors[i];
157 unsigned int length = le16_to_cpu(config->wTotalLength);
158
159 if (*ppos < pos + length) {
160
161 /* The descriptor may claim to be longer than it
162 * really is. Here is the actual allocated length. */
163 unsigned alloclen =
164 le16_to_cpu(dev->config[i].desc.wTotalLength);
165
166 len = length - (*ppos - pos);
167 if (len > nbytes)
168 len = nbytes;
169
170 /* Simply don't write (skip over) unallocated parts */
171 if (alloclen > (*ppos - pos)) {
172 alloclen -= (*ppos - pos);
173 if (copy_to_user(buf,
174 dev->rawdescriptors[i] + (*ppos - pos),
175 min(len, alloclen))) {
176 ret = -EFAULT;
177 goto err;
178 }
179 }
180
181 *ppos += len;
182 buf += len;
183 nbytes -= len;
184 ret += len;
185 }
186
187 pos += length;
188 }
189
190 err:
191 usb_unlock_device(dev);
192 return ret;
193 }
194
195 /*
196 * async list handling
197 */
198
199 static struct async *alloc_async(unsigned int numisoframes)
200 {
201 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
202 struct async *as = kmalloc(assize, GFP_KERNEL);
203 if (!as)
204 return NULL;
205 memset(as, 0, assize);
206 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
207 if (!as->urb) {
208 kfree(as);
209 return NULL;
210 }
211 return as;
212 }
213
214 static void free_async(struct async *as)
215 {
216 kfree(as->urb->transfer_buffer);
217 kfree(as->urb->setup_packet);
218 usb_free_urb(as->urb);
219 kfree(as);
220 }
221
222 static inline void async_newpending(struct async *as)
223 {
224 struct dev_state *ps = as->ps;
225 unsigned long flags;
226
227 spin_lock_irqsave(&ps->lock, flags);
228 list_add_tail(&as->asynclist, &ps->async_pending);
229 spin_unlock_irqrestore(&ps->lock, flags);
230 }
231
232 static inline void async_removepending(struct async *as)
233 {
234 struct dev_state *ps = as->ps;
235 unsigned long flags;
236
237 spin_lock_irqsave(&ps->lock, flags);
238 list_del_init(&as->asynclist);
239 spin_unlock_irqrestore(&ps->lock, flags);
240 }
241
242 static inline struct async *async_getcompleted(struct dev_state *ps)
243 {
244 unsigned long flags;
245 struct async *as = NULL;
246
247 spin_lock_irqsave(&ps->lock, flags);
248 if (!list_empty(&ps->async_completed)) {
249 as = list_entry(ps->async_completed.next, struct async, asynclist);
250 list_del_init(&as->asynclist);
251 }
252 spin_unlock_irqrestore(&ps->lock, flags);
253 return as;
254 }
255
256 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
257 {
258 unsigned long flags;
259 struct async *as;
260
261 spin_lock_irqsave(&ps->lock, flags);
262 list_for_each_entry(as, &ps->async_pending, asynclist)
263 if (as->userurb == userurb) {
264 list_del_init(&as->asynclist);
265 spin_unlock_irqrestore(&ps->lock, flags);
266 return as;
267 }
268 spin_unlock_irqrestore(&ps->lock, flags);
269 return NULL;
270 }
271
272 static void async_completed(struct urb *urb, struct pt_regs *regs)
273 {
274 struct async *as = (struct async *)urb->context;
275 struct dev_state *ps = as->ps;
276 struct siginfo sinfo;
277
278 spin_lock(&ps->lock);
279 list_move_tail(&as->asynclist, &ps->async_completed);
280 spin_unlock(&ps->lock);
281 if (as->signr) {
282 sinfo.si_signo = as->signr;
283 sinfo.si_errno = as->urb->status;
284 sinfo.si_code = SI_ASYNCIO;
285 sinfo.si_addr = as->userurb;
286 send_sig_info(as->signr, &sinfo, as->task);
287 }
288 wake_up(&ps->wait);
289 }
290
291 static void destroy_async (struct dev_state *ps, struct list_head *list)
292 {
293 struct async *as;
294 unsigned long flags;
295
296 spin_lock_irqsave(&ps->lock, flags);
297 while (!list_empty(list)) {
298 as = list_entry(list->next, struct async, asynclist);
299 list_del_init(&as->asynclist);
300
301 /* drop the spinlock so the completion handler can run */
302 spin_unlock_irqrestore(&ps->lock, flags);
303 usb_kill_urb(as->urb);
304 spin_lock_irqsave(&ps->lock, flags);
305 }
306 spin_unlock_irqrestore(&ps->lock, flags);
307 as = async_getcompleted(ps);
308 while (as) {
309 free_async(as);
310 as = async_getcompleted(ps);
311 }
312 }
313
314 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
315 {
316 struct list_head *p, *q, hitlist;
317 unsigned long flags;
318
319 INIT_LIST_HEAD(&hitlist);
320 spin_lock_irqsave(&ps->lock, flags);
321 list_for_each_safe(p, q, &ps->async_pending)
322 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
323 list_move_tail(p, &hitlist);
324 spin_unlock_irqrestore(&ps->lock, flags);
325 destroy_async(ps, &hitlist);
326 }
327
328 static inline void destroy_all_async(struct dev_state *ps)
329 {
330 destroy_async(ps, &ps->async_pending);
331 }
332
333 /*
334 * interface claims are made only at the request of user level code,
335 * which can also release them (explicitly or by closing files).
336 * they're also undone when devices disconnect.
337 */
338
339 static int driver_probe (struct usb_interface *intf,
340 const struct usb_device_id *id)
341 {
342 return -ENODEV;
343 }
344
345 static void driver_disconnect(struct usb_interface *intf)
346 {
347 struct dev_state *ps = usb_get_intfdata (intf);
348 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
349
350 if (!ps)
351 return;
352
353 /* NOTE: this relies on usbcore having canceled and completed
354 * all pending I/O requests; 2.6 does that.
355 */
356
357 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
358 clear_bit(ifnum, &ps->ifclaimed);
359 else
360 warn("interface number %u out of range", ifnum);
361
362 usb_set_intfdata (intf, NULL);
363
364 /* force async requests to complete */
365 destroy_async_on_interface(ps, ifnum);
366 }
367
368 struct usb_driver usbfs_driver = {
369 .owner = THIS_MODULE,
370 .name = "usbfs",
371 .probe = driver_probe,
372 .disconnect = driver_disconnect,
373 };
374
375 static int claimintf(struct dev_state *ps, unsigned int ifnum)
376 {
377 struct usb_device *dev = ps->dev;
378 struct usb_interface *intf;
379 int err;
380
381 if (ifnum >= 8*sizeof(ps->ifclaimed))
382 return -EINVAL;
383 /* already claimed */
384 if (test_bit(ifnum, &ps->ifclaimed))
385 return 0;
386
387 /* lock against other changes to driver bindings */
388 down_write(&usb_bus_type.subsys.rwsem);
389 intf = usb_ifnum_to_if(dev, ifnum);
390 if (!intf)
391 err = -ENOENT;
392 else
393 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
394 up_write(&usb_bus_type.subsys.rwsem);
395 if (err == 0)
396 set_bit(ifnum, &ps->ifclaimed);
397 return err;
398 }
399
400 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
401 {
402 struct usb_device *dev;
403 struct usb_interface *intf;
404 int err;
405
406 err = -EINVAL;
407 if (ifnum >= 8*sizeof(ps->ifclaimed))
408 return err;
409 dev = ps->dev;
410 /* lock against other changes to driver bindings */
411 down_write(&usb_bus_type.subsys.rwsem);
412 intf = usb_ifnum_to_if(dev, ifnum);
413 if (!intf)
414 err = -ENOENT;
415 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
416 usb_driver_release_interface(&usbfs_driver, intf);
417 err = 0;
418 }
419 up_write(&usb_bus_type.subsys.rwsem);
420 return err;
421 }
422
423 static int checkintf(struct dev_state *ps, unsigned int ifnum)
424 {
425 if (ps->dev->state != USB_STATE_CONFIGURED)
426 return -EHOSTUNREACH;
427 if (ifnum >= 8*sizeof(ps->ifclaimed))
428 return -EINVAL;
429 if (test_bit(ifnum, &ps->ifclaimed))
430 return 0;
431 /* if not yet claimed, claim it for the driver */
432 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
433 current->pid, current->comm, ifnum);
434 return claimintf(ps, ifnum);
435 }
436
437 static int findintfep(struct usb_device *dev, unsigned int ep)
438 {
439 unsigned int i, j, e;
440 struct usb_interface *intf;
441 struct usb_host_interface *alts;
442 struct usb_endpoint_descriptor *endpt;
443
444 if (ep & ~(USB_DIR_IN|0xf))
445 return -EINVAL;
446 if (!dev->actconfig)
447 return -ESRCH;
448 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
449 intf = dev->actconfig->interface[i];
450 for (j = 0; j < intf->num_altsetting; j++) {
451 alts = &intf->altsetting[j];
452 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
453 endpt = &alts->endpoint[e].desc;
454 if (endpt->bEndpointAddress == ep)
455 return alts->desc.bInterfaceNumber;
456 }
457 }
458 }
459 return -ENOENT;
460 }
461
462 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
463 {
464 int ret = 0;
465
466 if (ps->dev->state != USB_STATE_CONFIGURED)
467 return -EHOSTUNREACH;
468 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
469 return 0;
470
471 index &= 0xff;
472 switch (requesttype & USB_RECIP_MASK) {
473 case USB_RECIP_ENDPOINT:
474 if ((ret = findintfep(ps->dev, index)) >= 0)
475 ret = checkintf(ps, ret);
476 break;
477
478 case USB_RECIP_INTERFACE:
479 ret = checkintf(ps, index);
480 break;
481 }
482 return ret;
483 }
484
485 /*
486 * file operations
487 */
488 static int usbdev_open(struct inode *inode, struct file *file)
489 {
490 struct usb_device *dev;
491 struct dev_state *ps;
492 int ret;
493
494 /*
495 * no locking necessary here, as chrdev_open has the kernel lock
496 * (still acquire the kernel lock for safety)
497 */
498 ret = -ENOMEM;
499 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
500 goto out_nolock;
501
502 lock_kernel();
503 ret = -ENOENT;
504 dev = usb_get_dev(inode->u.generic_ip);
505 if (!dev) {
506 kfree(ps);
507 goto out;
508 }
509 ret = 0;
510 ps->dev = dev;
511 ps->file = file;
512 spin_lock_init(&ps->lock);
513 INIT_LIST_HEAD(&ps->async_pending);
514 INIT_LIST_HEAD(&ps->async_completed);
515 init_waitqueue_head(&ps->wait);
516 ps->discsignr = 0;
517 ps->disctask = current;
518 ps->disccontext = NULL;
519 ps->ifclaimed = 0;
520 wmb();
521 list_add_tail(&ps->list, &dev->filelist);
522 file->private_data = ps;
523 out:
524 unlock_kernel();
525 out_nolock:
526 return ret;
527 }
528
529 static int usbdev_release(struct inode *inode, struct file *file)
530 {
531 struct dev_state *ps = (struct dev_state *)file->private_data;
532 struct usb_device *dev = ps->dev;
533 unsigned int ifnum;
534
535 usb_lock_device(dev);
536 list_del_init(&ps->list);
537 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
538 ifnum++) {
539 if (test_bit(ifnum, &ps->ifclaimed))
540 releaseintf(ps, ifnum);
541 }
542 destroy_all_async(ps);
543 usb_unlock_device(dev);
544 usb_put_dev(dev);
545 ps->dev = NULL;
546 kfree(ps);
547 return 0;
548 }
549
550 static int proc_control(struct dev_state *ps, void __user *arg)
551 {
552 struct usb_device *dev = ps->dev;
553 struct usbdevfs_ctrltransfer ctrl;
554 unsigned int tmo;
555 unsigned char *tbuf;
556 int i, j, ret;
557
558 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
559 return -EFAULT;
560 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
561 return ret;
562 if (ctrl.wLength > PAGE_SIZE)
563 return -EINVAL;
564 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
565 return -ENOMEM;
566 tmo = ctrl.timeout;
567 if (ctrl.bRequestType & 0x80) {
568 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
569 free_page((unsigned long)tbuf);
570 return -EINVAL;
571 }
572 snoop(&dev->dev, "control read: bRequest=%02x "
573 "bRrequestType=%02x wValue=%04x "
574 "wIndex=%04x wLength=%04x\n",
575 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
576 ctrl.wIndex, ctrl.wLength);
577
578 usb_unlock_device(dev);
579 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
580 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
581 usb_lock_device(dev);
582 if ((i > 0) && ctrl.wLength) {
583 if (usbfs_snoop) {
584 dev_info(&dev->dev, "control read: data ");
585 for (j = 0; j < i; ++j)
586 printk ("%02x ", (unsigned char)(tbuf)[j]);
587 printk("\n");
588 }
589 if (copy_to_user(ctrl.data, tbuf, i)) {
590 free_page((unsigned long)tbuf);
591 return -EFAULT;
592 }
593 }
594 } else {
595 if (ctrl.wLength) {
596 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
597 free_page((unsigned long)tbuf);
598 return -EFAULT;
599 }
600 }
601 snoop(&dev->dev, "control write: bRequest=%02x "
602 "bRrequestType=%02x wValue=%04x "
603 "wIndex=%04x wLength=%04x\n",
604 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
605 ctrl.wIndex, ctrl.wLength);
606 if (usbfs_snoop) {
607 dev_info(&dev->dev, "control write: data: ");
608 for (j = 0; j < ctrl.wLength; ++j)
609 printk ("%02x ", (unsigned char)(tbuf)[j]);
610 printk("\n");
611 }
612 usb_unlock_device(dev);
613 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
614 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
615 usb_lock_device(dev);
616 }
617 free_page((unsigned long)tbuf);
618 if (i<0 && i != -EPIPE) {
619 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
620 "failed cmd %s rqt %u rq %u len %u ret %d\n",
621 current->comm, ctrl.bRequestType, ctrl.bRequest,
622 ctrl.wLength, i);
623 }
624 return i;
625 }
626
627 static int proc_bulk(struct dev_state *ps, void __user *arg)
628 {
629 struct usb_device *dev = ps->dev;
630 struct usbdevfs_bulktransfer bulk;
631 unsigned int tmo, len1, pipe;
632 int len2;
633 unsigned char *tbuf;
634 int i, ret;
635
636 if (copy_from_user(&bulk, arg, sizeof(bulk)))
637 return -EFAULT;
638 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
639 return ret;
640 if ((ret = checkintf(ps, ret)))
641 return ret;
642 if (bulk.ep & USB_DIR_IN)
643 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
644 else
645 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
646 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
647 return -EINVAL;
648 len1 = bulk.len;
649 if (len1 > MAX_USBFS_BUFFER_SIZE)
650 return -EINVAL;
651 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
652 return -ENOMEM;
653 tmo = bulk.timeout;
654 if (bulk.ep & 0x80) {
655 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
656 kfree(tbuf);
657 return -EINVAL;
658 }
659 usb_unlock_device(dev);
660 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
661 usb_lock_device(dev);
662 if (!i && len2) {
663 if (copy_to_user(bulk.data, tbuf, len2)) {
664 kfree(tbuf);
665 return -EFAULT;
666 }
667 }
668 } else {
669 if (len1) {
670 if (copy_from_user(tbuf, bulk.data, len1)) {
671 kfree(tbuf);
672 return -EFAULT;
673 }
674 }
675 usb_unlock_device(dev);
676 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
677 usb_lock_device(dev);
678 }
679 kfree(tbuf);
680 if (i < 0)
681 return i;
682 return len2;
683 }
684
685 static int proc_resetep(struct dev_state *ps, void __user *arg)
686 {
687 unsigned int ep;
688 int ret;
689
690 if (get_user(ep, (unsigned int __user *)arg))
691 return -EFAULT;
692 if ((ret = findintfep(ps->dev, ep)) < 0)
693 return ret;
694 if ((ret = checkintf(ps, ret)))
695 return ret;
696 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
697 return 0;
698 }
699
700 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
701 {
702 unsigned int ep;
703 int pipe;
704 int ret;
705
706 if (get_user(ep, (unsigned int __user *)arg))
707 return -EFAULT;
708 if ((ret = findintfep(ps->dev, ep)) < 0)
709 return ret;
710 if ((ret = checkintf(ps, ret)))
711 return ret;
712 if (ep & USB_DIR_IN)
713 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
714 else
715 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
716
717 return usb_clear_halt(ps->dev, pipe);
718 }
719
720
721 static int proc_getdriver(struct dev_state *ps, void __user *arg)
722 {
723 struct usbdevfs_getdriver gd;
724 struct usb_interface *intf;
725 int ret;
726
727 if (copy_from_user(&gd, arg, sizeof(gd)))
728 return -EFAULT;
729 down_read(&usb_bus_type.subsys.rwsem);
730 intf = usb_ifnum_to_if(ps->dev, gd.interface);
731 if (!intf || !intf->dev.driver)
732 ret = -ENODATA;
733 else {
734 strncpy(gd.driver, intf->dev.driver->name,
735 sizeof(gd.driver));
736 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
737 }
738 up_read(&usb_bus_type.subsys.rwsem);
739 return ret;
740 }
741
742 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
743 {
744 struct usbdevfs_connectinfo ci;
745
746 ci.devnum = ps->dev->devnum;
747 ci.slow = ps->dev->speed == USB_SPEED_LOW;
748 if (copy_to_user(arg, &ci, sizeof(ci)))
749 return -EFAULT;
750 return 0;
751 }
752
753 static int proc_resetdevice(struct dev_state *ps)
754 {
755 return usb_reset_device(ps->dev);
756
757 }
758
759 static int proc_setintf(struct dev_state *ps, void __user *arg)
760 {
761 struct usbdevfs_setinterface setintf;
762 int ret;
763
764 if (copy_from_user(&setintf, arg, sizeof(setintf)))
765 return -EFAULT;
766 if ((ret = checkintf(ps, setintf.interface)))
767 return ret;
768 return usb_set_interface(ps->dev, setintf.interface,
769 setintf.altsetting);
770 }
771
772 static int proc_setconfig(struct dev_state *ps, void __user *arg)
773 {
774 unsigned int u;
775 int status = 0;
776 struct usb_host_config *actconfig;
777
778 if (get_user(u, (unsigned int __user *)arg))
779 return -EFAULT;
780
781 actconfig = ps->dev->actconfig;
782
783 /* Don't touch the device if any interfaces are claimed.
784 * It could interfere with other drivers' operations, and if
785 * an interface is claimed by usbfs it could easily deadlock.
786 */
787 if (actconfig) {
788 int i;
789
790 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
791 if (usb_interface_claimed(actconfig->interface[i])) {
792 dev_warn (&ps->dev->dev,
793 "usbfs: interface %d claimed by %s "
794 "while '%s' sets config #%d\n",
795 actconfig->interface[i]
796 ->cur_altsetting
797 ->desc.bInterfaceNumber,
798 actconfig->interface[i]
799 ->dev.driver->name,
800 current->comm, u);
801 status = -EBUSY;
802 break;
803 }
804 }
805 }
806
807 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
808 * so avoid usb_set_configuration()'s kick to sysfs
809 */
810 if (status == 0) {
811 if (actconfig && actconfig->desc.bConfigurationValue == u)
812 status = usb_reset_configuration(ps->dev);
813 else
814 status = usb_set_configuration(ps->dev, u);
815 }
816
817 return status;
818 }
819
820
821 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
822 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
823 void __user *arg)
824 {
825 struct usbdevfs_iso_packet_desc *isopkt = NULL;
826 struct usb_host_endpoint *ep;
827 struct async *as;
828 struct usb_ctrlrequest *dr = NULL;
829 unsigned int u, totlen, isofrmlen;
830 int ret, interval = 0, ifnum = -1;
831
832 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
833 URB_NO_FSBR|URB_ZERO_PACKET))
834 return -EINVAL;
835 if (!uurb->buffer)
836 return -EINVAL;
837 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
838 return -EINVAL;
839 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
840 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
841 return ifnum;
842 if ((ret = checkintf(ps, ifnum)))
843 return ret;
844 }
845 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
846 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
847 else
848 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
849 if (!ep)
850 return -ENOENT;
851 switch(uurb->type) {
852 case USBDEVFS_URB_TYPE_CONTROL:
853 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
854 != USB_ENDPOINT_XFER_CONTROL)
855 return -EINVAL;
856 /* min 8 byte setup packet, max arbitrary */
857 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
858 return -EINVAL;
859 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
860 return -ENOMEM;
861 if (copy_from_user(dr, uurb->buffer, 8)) {
862 kfree(dr);
863 return -EFAULT;
864 }
865 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
866 kfree(dr);
867 return -EINVAL;
868 }
869 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
870 kfree(dr);
871 return ret;
872 }
873 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
874 uurb->number_of_packets = 0;
875 uurb->buffer_length = le16_to_cpup(&dr->wLength);
876 uurb->buffer += 8;
877 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
878 kfree(dr);
879 return -EFAULT;
880 }
881 break;
882
883 case USBDEVFS_URB_TYPE_BULK:
884 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
885 case USB_ENDPOINT_XFER_CONTROL:
886 case USB_ENDPOINT_XFER_ISOC:
887 return -EINVAL;
888 /* allow single-shot interrupt transfers, at bogus rates */
889 }
890 uurb->number_of_packets = 0;
891 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
892 return -EINVAL;
893 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
894 return -EFAULT;
895 break;
896
897 case USBDEVFS_URB_TYPE_ISO:
898 /* arbitrary limit */
899 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
900 return -EINVAL;
901 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
902 != USB_ENDPOINT_XFER_ISOC)
903 return -EINVAL;
904 interval = 1 << min (15, ep->desc.bInterval - 1);
905 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
906 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
907 return -ENOMEM;
908 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
909 kfree(isopkt);
910 return -EFAULT;
911 }
912 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
913 if (isopkt[u].length > 1023) {
914 kfree(isopkt);
915 return -EINVAL;
916 }
917 totlen += isopkt[u].length;
918 }
919 if (totlen > 32768) {
920 kfree(isopkt);
921 return -EINVAL;
922 }
923 uurb->buffer_length = totlen;
924 break;
925
926 case USBDEVFS_URB_TYPE_INTERRUPT:
927 uurb->number_of_packets = 0;
928 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
929 != USB_ENDPOINT_XFER_INT)
930 return -EINVAL;
931 if (ps->dev->speed == USB_SPEED_HIGH)
932 interval = 1 << min (15, ep->desc.bInterval - 1);
933 else
934 interval = ep->desc.bInterval;
935 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
936 return -EINVAL;
937 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
938 return -EFAULT;
939 break;
940
941 default:
942 return -EINVAL;
943 }
944 if (!(as = alloc_async(uurb->number_of_packets))) {
945 kfree(isopkt);
946 kfree(dr);
947 return -ENOMEM;
948 }
949 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
950 kfree(isopkt);
951 kfree(dr);
952 free_async(as);
953 return -ENOMEM;
954 }
955 as->urb->dev = ps->dev;
956 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
957 as->urb->transfer_flags = uurb->flags;
958 as->urb->transfer_buffer_length = uurb->buffer_length;
959 as->urb->setup_packet = (unsigned char*)dr;
960 as->urb->start_frame = uurb->start_frame;
961 as->urb->number_of_packets = uurb->number_of_packets;
962 as->urb->interval = interval;
963 as->urb->context = as;
964 as->urb->complete = async_completed;
965 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
966 as->urb->iso_frame_desc[u].offset = totlen;
967 as->urb->iso_frame_desc[u].length = isopkt[u].length;
968 totlen += isopkt[u].length;
969 }
970 kfree(isopkt);
971 as->ps = ps;
972 as->userurb = arg;
973 if (uurb->endpoint & USB_DIR_IN)
974 as->userbuffer = uurb->buffer;
975 else
976 as->userbuffer = NULL;
977 as->signr = uurb->signr;
978 as->ifnum = ifnum;
979 as->task = current;
980 if (!(uurb->endpoint & USB_DIR_IN)) {
981 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
982 free_async(as);
983 return -EFAULT;
984 }
985 }
986 async_newpending(as);
987 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
988 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
989 async_removepending(as);
990 free_async(as);
991 return ret;
992 }
993 return 0;
994 }
995
996 static int proc_submiturb(struct dev_state *ps, void __user *arg)
997 {
998 struct usbdevfs_urb uurb;
999
1000 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1001 return -EFAULT;
1002
1003 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1004 }
1005
1006 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1007 {
1008 struct async *as;
1009
1010 as = async_getpending(ps, arg);
1011 if (!as)
1012 return -EINVAL;
1013 usb_kill_urb(as->urb);
1014 return 0;
1015 }
1016
1017 static int processcompl(struct async *as, void __user * __user *arg)
1018 {
1019 struct urb *urb = as->urb;
1020 struct usbdevfs_urb __user *userurb = as->userurb;
1021 void __user *addr = as->userurb;
1022 unsigned int i;
1023
1024 if (as->userbuffer)
1025 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1026 return -EFAULT;
1027 if (put_user(urb->status, &userurb->status))
1028 return -EFAULT;
1029 if (put_user(urb->actual_length, &userurb->actual_length))
1030 return -EFAULT;
1031 if (put_user(urb->error_count, &userurb->error_count))
1032 return -EFAULT;
1033
1034 if (usb_pipeisoc(urb->pipe)) {
1035 for (i = 0; i < urb->number_of_packets; i++) {
1036 if (put_user(urb->iso_frame_desc[i].actual_length,
1037 &userurb->iso_frame_desc[i].actual_length))
1038 return -EFAULT;
1039 if (put_user(urb->iso_frame_desc[i].status,
1040 &userurb->iso_frame_desc[i].status))
1041 return -EFAULT;
1042 }
1043 }
1044
1045 free_async(as);
1046
1047 if (put_user(addr, (void __user * __user *)arg))
1048 return -EFAULT;
1049 return 0;
1050 }
1051
1052 static struct async* reap_as(struct dev_state *ps)
1053 {
1054 DECLARE_WAITQUEUE(wait, current);
1055 struct async *as = NULL;
1056 struct usb_device *dev = ps->dev;
1057
1058 add_wait_queue(&ps->wait, &wait);
1059 for (;;) {
1060 __set_current_state(TASK_INTERRUPTIBLE);
1061 if ((as = async_getcompleted(ps)))
1062 break;
1063 if (signal_pending(current))
1064 break;
1065 usb_unlock_device(dev);
1066 schedule();
1067 usb_lock_device(dev);
1068 }
1069 remove_wait_queue(&ps->wait, &wait);
1070 set_current_state(TASK_RUNNING);
1071 return as;
1072 }
1073
1074 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1075 {
1076 struct async *as = reap_as(ps);
1077 if (as)
1078 return processcompl(as, (void __user * __user *)arg);
1079 if (signal_pending(current))
1080 return -EINTR;
1081 return -EIO;
1082 }
1083
1084 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1085 {
1086 struct async *as;
1087
1088 if (!(as = async_getcompleted(ps)))
1089 return -EAGAIN;
1090 return processcompl(as, (void __user * __user *)arg);
1091 }
1092
1093 #ifdef CONFIG_COMPAT
1094
1095 static int get_urb32(struct usbdevfs_urb *kurb,
1096 struct usbdevfs_urb32 __user *uurb)
1097 {
1098 __u32 uptr;
1099 if (get_user(kurb->type, &uurb->type) ||
1100 __get_user(kurb->endpoint, &uurb->endpoint) ||
1101 __get_user(kurb->status, &uurb->status) ||
1102 __get_user(kurb->flags, &uurb->flags) ||
1103 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1104 __get_user(kurb->actual_length, &uurb->actual_length) ||
1105 __get_user(kurb->start_frame, &uurb->start_frame) ||
1106 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1107 __get_user(kurb->error_count, &uurb->error_count) ||
1108 __get_user(kurb->signr, &uurb->signr))
1109 return -EFAULT;
1110
1111 if (__get_user(uptr, &uurb->buffer))
1112 return -EFAULT;
1113 kurb->buffer = compat_ptr(uptr);
1114 if (__get_user(uptr, &uurb->buffer))
1115 return -EFAULT;
1116 kurb->usercontext = compat_ptr(uptr);
1117
1118 return 0;
1119 }
1120
1121 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1122 {
1123 struct usbdevfs_urb uurb;
1124
1125 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1126 return -EFAULT;
1127
1128 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1129 }
1130
1131 static int processcompl_compat(struct async *as, void __user * __user *arg)
1132 {
1133 struct urb *urb = as->urb;
1134 struct usbdevfs_urb32 __user *userurb = as->userurb;
1135 void __user *addr = as->userurb;
1136 unsigned int i;
1137
1138 if (as->userbuffer)
1139 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1140 return -EFAULT;
1141 if (put_user(urb->status, &userurb->status))
1142 return -EFAULT;
1143 if (put_user(urb->actual_length, &userurb->actual_length))
1144 return -EFAULT;
1145 if (put_user(urb->error_count, &userurb->error_count))
1146 return -EFAULT;
1147
1148 if (usb_pipeisoc(urb->pipe)) {
1149 for (i = 0; i < urb->number_of_packets; i++) {
1150 if (put_user(urb->iso_frame_desc[i].actual_length,
1151 &userurb->iso_frame_desc[i].actual_length))
1152 return -EFAULT;
1153 if (put_user(urb->iso_frame_desc[i].status,
1154 &userurb->iso_frame_desc[i].status))
1155 return -EFAULT;
1156 }
1157 }
1158
1159 free_async(as);
1160 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1161 return -EFAULT;
1162 return 0;
1163 }
1164
1165 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1166 {
1167 struct async *as = reap_as(ps);
1168 if (as)
1169 return processcompl_compat(as, (void __user * __user *)arg);
1170 if (signal_pending(current))
1171 return -EINTR;
1172 return -EIO;
1173 }
1174
1175 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1176 {
1177 struct async *as;
1178
1179 if (!(as = async_getcompleted(ps)))
1180 return -EAGAIN;
1181 return processcompl_compat(as, (void __user * __user *)arg);
1182 }
1183
1184 #endif
1185
1186 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1187 {
1188 struct usbdevfs_disconnectsignal ds;
1189
1190 if (copy_from_user(&ds, arg, sizeof(ds)))
1191 return -EFAULT;
1192 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1193 return -EINVAL;
1194 ps->discsignr = ds.signr;
1195 ps->disccontext = ds.context;
1196 return 0;
1197 }
1198
1199 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1200 {
1201 unsigned int ifnum;
1202
1203 if (get_user(ifnum, (unsigned int __user *)arg))
1204 return -EFAULT;
1205 return claimintf(ps, ifnum);
1206 }
1207
1208 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1209 {
1210 unsigned int ifnum;
1211 int ret;
1212
1213 if (get_user(ifnum, (unsigned int __user *)arg))
1214 return -EFAULT;
1215 if ((ret = releaseintf(ps, ifnum)) < 0)
1216 return ret;
1217 destroy_async_on_interface (ps, ifnum);
1218 return 0;
1219 }
1220
1221 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1222 {
1223 struct usbdevfs_ioctl ctrl;
1224 int size;
1225 void *buf = NULL;
1226 int retval = 0;
1227 struct usb_interface *intf = NULL;
1228 struct usb_driver *driver = NULL;
1229 int i;
1230
1231 /* get input parameters and alloc buffer */
1232 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1233 return -EFAULT;
1234 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1235 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1236 return -ENOMEM;
1237 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1238 if (copy_from_user (buf, ctrl.data, size)) {
1239 kfree(buf);
1240 return -EFAULT;
1241 }
1242 } else {
1243 memset (buf, 0, size);
1244 }
1245 }
1246
1247 if (!connected(ps->dev)) {
1248 kfree(buf);
1249 return -ENODEV;
1250 }
1251
1252 if (ps->dev->state != USB_STATE_CONFIGURED)
1253 retval = -EHOSTUNREACH;
1254 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1255 retval = -EINVAL;
1256 else switch (ctrl.ioctl_code) {
1257
1258 /* disconnect kernel driver from interface */
1259 case USBDEVFS_DISCONNECT:
1260
1261 /* don't allow the user to unbind the hub driver from
1262 * a hub with children to manage */
1263 for (i = 0; i < ps->dev->maxchild; ++i) {
1264 if (ps->dev->children[i])
1265 retval = -EBUSY;
1266 }
1267 if (retval)
1268 break;
1269
1270 down_write(&usb_bus_type.subsys.rwsem);
1271 if (intf->dev.driver) {
1272 driver = to_usb_driver(intf->dev.driver);
1273 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1274 usb_driver_release_interface(driver, intf);
1275 } else
1276 retval = -ENODATA;
1277 up_write(&usb_bus_type.subsys.rwsem);
1278 break;
1279
1280 /* let kernel drivers try to (re)bind to the interface */
1281 case USBDEVFS_CONNECT:
1282 usb_unlock_device(ps->dev);
1283 usb_lock_all_devices();
1284 bus_rescan_devices(intf->dev.bus);
1285 usb_unlock_all_devices();
1286 usb_lock_device(ps->dev);
1287 break;
1288
1289 /* talk directly to the interface's driver */
1290 default:
1291 down_read(&usb_bus_type.subsys.rwsem);
1292 if (intf->dev.driver)
1293 driver = to_usb_driver(intf->dev.driver);
1294 if (driver == NULL || driver->ioctl == NULL) {
1295 retval = -ENOTTY;
1296 } else {
1297 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1298 if (retval == -ENOIOCTLCMD)
1299 retval = -ENOTTY;
1300 }
1301 up_read(&usb_bus_type.subsys.rwsem);
1302 }
1303
1304 /* cleanup and return */
1305 if (retval >= 0
1306 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1307 && size > 0
1308 && copy_to_user (ctrl.data, buf, size) != 0)
1309 retval = -EFAULT;
1310
1311 kfree(buf);
1312 return retval;
1313 }
1314
1315 /*
1316 * NOTE: All requests here that have interface numbers as parameters
1317 * are assuming that somehow the configuration has been prevented from
1318 * changing. But there's no mechanism to ensure that...
1319 */
1320 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1321 {
1322 struct dev_state *ps = (struct dev_state *)file->private_data;
1323 struct usb_device *dev = ps->dev;
1324 void __user *p = (void __user *)arg;
1325 int ret = -ENOTTY;
1326
1327 if (!(file->f_mode & FMODE_WRITE))
1328 return -EPERM;
1329 usb_lock_device(dev);
1330 if (!connected(dev)) {
1331 usb_unlock_device(dev);
1332 return -ENODEV;
1333 }
1334
1335 switch (cmd) {
1336 case USBDEVFS_CONTROL:
1337 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1338 ret = proc_control(ps, p);
1339 if (ret >= 0)
1340 inode->i_mtime = CURRENT_TIME;
1341 break;
1342
1343 case USBDEVFS_BULK:
1344 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1345 ret = proc_bulk(ps, p);
1346 if (ret >= 0)
1347 inode->i_mtime = CURRENT_TIME;
1348 break;
1349
1350 case USBDEVFS_RESETEP:
1351 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1352 ret = proc_resetep(ps, p);
1353 if (ret >= 0)
1354 inode->i_mtime = CURRENT_TIME;
1355 break;
1356
1357 case USBDEVFS_RESET:
1358 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1359 ret = proc_resetdevice(ps);
1360 break;
1361
1362 case USBDEVFS_CLEAR_HALT:
1363 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1364 ret = proc_clearhalt(ps, p);
1365 if (ret >= 0)
1366 inode->i_mtime = CURRENT_TIME;
1367 break;
1368
1369 case USBDEVFS_GETDRIVER:
1370 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1371 ret = proc_getdriver(ps, p);
1372 break;
1373
1374 case USBDEVFS_CONNECTINFO:
1375 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1376 ret = proc_connectinfo(ps, p);
1377 break;
1378
1379 case USBDEVFS_SETINTERFACE:
1380 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1381 ret = proc_setintf(ps, p);
1382 break;
1383
1384 case USBDEVFS_SETCONFIGURATION:
1385 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1386 ret = proc_setconfig(ps, p);
1387 break;
1388
1389 case USBDEVFS_SUBMITURB:
1390 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1391 ret = proc_submiturb(ps, p);
1392 if (ret >= 0)
1393 inode->i_mtime = CURRENT_TIME;
1394 break;
1395
1396 #ifdef CONFIG_COMPAT
1397
1398 case USBDEVFS_SUBMITURB32:
1399 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1400 ret = proc_submiturb_compat(ps, p);
1401 if (ret >= 0)
1402 inode->i_mtime = CURRENT_TIME;
1403 break;
1404
1405 case USBDEVFS_REAPURB32:
1406 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1407 ret = proc_reapurb_compat(ps, p);
1408 break;
1409
1410 case USBDEVFS_REAPURBNDELAY32:
1411 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1412 ret = proc_reapurbnonblock_compat(ps, p);
1413 break;
1414
1415 #endif
1416
1417 case USBDEVFS_DISCARDURB:
1418 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1419 ret = proc_unlinkurb(ps, p);
1420 break;
1421
1422 case USBDEVFS_REAPURB:
1423 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1424 ret = proc_reapurb(ps, p);
1425 break;
1426
1427 case USBDEVFS_REAPURBNDELAY:
1428 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1429 ret = proc_reapurbnonblock(ps, p);
1430 break;
1431
1432 case USBDEVFS_DISCSIGNAL:
1433 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1434 ret = proc_disconnectsignal(ps, p);
1435 break;
1436
1437 case USBDEVFS_CLAIMINTERFACE:
1438 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1439 ret = proc_claiminterface(ps, p);
1440 break;
1441
1442 case USBDEVFS_RELEASEINTERFACE:
1443 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1444 ret = proc_releaseinterface(ps, p);
1445 break;
1446
1447 case USBDEVFS_IOCTL:
1448 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1449 ret = proc_ioctl(ps, p);
1450 break;
1451 }
1452 usb_unlock_device(dev);
1453 if (ret >= 0)
1454 inode->i_atime = CURRENT_TIME;
1455 return ret;
1456 }
1457
1458 /* No kernel lock - fine */
1459 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1460 {
1461 struct dev_state *ps = (struct dev_state *)file->private_data;
1462 unsigned int mask = 0;
1463
1464 poll_wait(file, &ps->wait, wait);
1465 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1466 mask |= POLLOUT | POLLWRNORM;
1467 if (!connected(ps->dev))
1468 mask |= POLLERR | POLLHUP;
1469 return mask;
1470 }
1471
1472 struct file_operations usbfs_device_file_operations = {
1473 .llseek = usbdev_lseek,
1474 .read = usbdev_read,
1475 .poll = usbdev_poll,
1476 .ioctl = usbdev_ioctl,
1477 .open = usbdev_open,
1478 .release = usbdev_release,
1479 };
linux-next