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 if (as->urb->transfer_buffer)
217 kfree(as->urb->transfer_buffer);
218 if (as->urb->setup_packet)
219 kfree(as->urb->setup_packet);
220 usb_free_urb(as->urb);
221 kfree(as);
222 }
223
224 static inline void async_newpending(struct async *as)
225 {
226 struct dev_state *ps = as->ps;
227 unsigned long flags;
228
229 spin_lock_irqsave(&ps->lock, flags);
230 list_add_tail(&as->asynclist, &ps->async_pending);
231 spin_unlock_irqrestore(&ps->lock, flags);
232 }
233
234 static inline void async_removepending(struct async *as)
235 {
236 struct dev_state *ps = as->ps;
237 unsigned long flags;
238
239 spin_lock_irqsave(&ps->lock, flags);
240 list_del_init(&as->asynclist);
241 spin_unlock_irqrestore(&ps->lock, flags);
242 }
243
244 static inline struct async *async_getcompleted(struct dev_state *ps)
245 {
246 unsigned long flags;
247 struct async *as = NULL;
248
249 spin_lock_irqsave(&ps->lock, flags);
250 if (!list_empty(&ps->async_completed)) {
251 as = list_entry(ps->async_completed.next, struct async, asynclist);
252 list_del_init(&as->asynclist);
253 }
254 spin_unlock_irqrestore(&ps->lock, flags);
255 return as;
256 }
257
258 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
259 {
260 unsigned long flags;
261 struct async *as;
262
263 spin_lock_irqsave(&ps->lock, flags);
264 list_for_each_entry(as, &ps->async_pending, asynclist)
265 if (as->userurb == userurb) {
266 list_del_init(&as->asynclist);
267 spin_unlock_irqrestore(&ps->lock, flags);
268 return as;
269 }
270 spin_unlock_irqrestore(&ps->lock, flags);
271 return NULL;
272 }
273
274 static void async_completed(struct urb *urb, struct pt_regs *regs)
275 {
276 struct async *as = (struct async *)urb->context;
277 struct dev_state *ps = as->ps;
278 struct siginfo sinfo;
279
280 spin_lock(&ps->lock);
281 list_move_tail(&as->asynclist, &ps->async_completed);
282 spin_unlock(&ps->lock);
283 if (as->signr) {
284 sinfo.si_signo = as->signr;
285 sinfo.si_errno = as->urb->status;
286 sinfo.si_code = SI_ASYNCIO;
287 sinfo.si_addr = as->userurb;
288 send_sig_info(as->signr, &sinfo, as->task);
289 }
290 wake_up(&ps->wait);
291 }
292
293 static void destroy_async (struct dev_state *ps, struct list_head *list)
294 {
295 struct async *as;
296 unsigned long flags;
297
298 spin_lock_irqsave(&ps->lock, flags);
299 while (!list_empty(list)) {
300 as = list_entry(list->next, struct async, asynclist);
301 list_del_init(&as->asynclist);
302
303 /* drop the spinlock so the completion handler can run */
304 spin_unlock_irqrestore(&ps->lock, flags);
305 usb_kill_urb(as->urb);
306 spin_lock_irqsave(&ps->lock, flags);
307 }
308 spin_unlock_irqrestore(&ps->lock, flags);
309 as = async_getcompleted(ps);
310 while (as) {
311 free_async(as);
312 as = async_getcompleted(ps);
313 }
314 }
315
316 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
317 {
318 struct list_head *p, *q, hitlist;
319 unsigned long flags;
320
321 INIT_LIST_HEAD(&hitlist);
322 spin_lock_irqsave(&ps->lock, flags);
323 list_for_each_safe(p, q, &ps->async_pending)
324 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
325 list_move_tail(p, &hitlist);
326 spin_unlock_irqrestore(&ps->lock, flags);
327 destroy_async(ps, &hitlist);
328 }
329
330 static inline void destroy_all_async(struct dev_state *ps)
331 {
332 destroy_async(ps, &ps->async_pending);
333 }
334
335 /*
336 * interface claims are made only at the request of user level code,
337 * which can also release them (explicitly or by closing files).
338 * they're also undone when devices disconnect.
339 */
340
341 static int driver_probe (struct usb_interface *intf,
342 const struct usb_device_id *id)
343 {
344 return -ENODEV;
345 }
346
347 static void driver_disconnect(struct usb_interface *intf)
348 {
349 struct dev_state *ps = usb_get_intfdata (intf);
350 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
351
352 if (!ps)
353 return;
354
355 /* NOTE: this relies on usbcore having canceled and completed
356 * all pending I/O requests; 2.6 does that.
357 */
358
359 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
360 clear_bit(ifnum, &ps->ifclaimed);
361 else
362 warn("interface number %u out of range", ifnum);
363
364 usb_set_intfdata (intf, NULL);
365
366 /* force async requests to complete */
367 destroy_async_on_interface(ps, ifnum);
368 }
369
370 struct usb_driver usbfs_driver = {
371 .owner = THIS_MODULE,
372 .name = "usbfs",
373 .probe = driver_probe,
374 .disconnect = driver_disconnect,
375 };
376
377 static int claimintf(struct dev_state *ps, unsigned int ifnum)
378 {
379 struct usb_device *dev = ps->dev;
380 struct usb_interface *intf;
381 int err;
382
383 if (ifnum >= 8*sizeof(ps->ifclaimed))
384 return -EINVAL;
385 /* already claimed */
386 if (test_bit(ifnum, &ps->ifclaimed))
387 return 0;
388
389 /* lock against other changes to driver bindings */
390 down_write(&usb_bus_type.subsys.rwsem);
391 intf = usb_ifnum_to_if(dev, ifnum);
392 if (!intf)
393 err = -ENOENT;
394 else
395 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
396 up_write(&usb_bus_type.subsys.rwsem);
397 if (err == 0)
398 set_bit(ifnum, &ps->ifclaimed);
399 return err;
400 }
401
402 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
403 {
404 struct usb_device *dev;
405 struct usb_interface *intf;
406 int err;
407
408 err = -EINVAL;
409 if (ifnum >= 8*sizeof(ps->ifclaimed))
410 return err;
411 dev = ps->dev;
412 /* lock against other changes to driver bindings */
413 down_write(&usb_bus_type.subsys.rwsem);
414 intf = usb_ifnum_to_if(dev, ifnum);
415 if (!intf)
416 err = -ENOENT;
417 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
418 usb_driver_release_interface(&usbfs_driver, intf);
419 err = 0;
420 }
421 up_write(&usb_bus_type.subsys.rwsem);
422 return err;
423 }
424
425 static int checkintf(struct dev_state *ps, unsigned int ifnum)
426 {
427 if (ps->dev->state != USB_STATE_CONFIGURED)
428 return -EHOSTUNREACH;
429 if (ifnum >= 8*sizeof(ps->ifclaimed))
430 return -EINVAL;
431 if (test_bit(ifnum, &ps->ifclaimed))
432 return 0;
433 /* if not yet claimed, claim it for the driver */
434 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
435 current->pid, current->comm, ifnum);
436 return claimintf(ps, ifnum);
437 }
438
439 static int findintfep(struct usb_device *dev, unsigned int ep)
440 {
441 unsigned int i, j, e;
442 struct usb_interface *intf;
443 struct usb_host_interface *alts;
444 struct usb_endpoint_descriptor *endpt;
445
446 if (ep & ~(USB_DIR_IN|0xf))
447 return -EINVAL;
448 if (!dev->actconfig)
449 return -ESRCH;
450 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
451 intf = dev->actconfig->interface[i];
452 for (j = 0; j < intf->num_altsetting; j++) {
453 alts = &intf->altsetting[j];
454 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
455 endpt = &alts->endpoint[e].desc;
456 if (endpt->bEndpointAddress == ep)
457 return alts->desc.bInterfaceNumber;
458 }
459 }
460 }
461 return -ENOENT;
462 }
463
464 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
465 {
466 int ret = 0;
467
468 if (ps->dev->state != USB_STATE_CONFIGURED)
469 return -EHOSTUNREACH;
470 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
471 return 0;
472
473 index &= 0xff;
474 switch (requesttype & USB_RECIP_MASK) {
475 case USB_RECIP_ENDPOINT:
476 if ((ret = findintfep(ps->dev, index)) >= 0)
477 ret = checkintf(ps, ret);
478 break;
479
480 case USB_RECIP_INTERFACE:
481 ret = checkintf(ps, index);
482 break;
483 }
484 return ret;
485 }
486
487 /*
488 * file operations
489 */
490 static int usbdev_open(struct inode *inode, struct file *file)
491 {
492 struct usb_device *dev;
493 struct dev_state *ps;
494 int ret;
495
496 /*
497 * no locking necessary here, as chrdev_open has the kernel lock
498 * (still acquire the kernel lock for safety)
499 */
500 ret = -ENOMEM;
501 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
502 goto out_nolock;
503
504 lock_kernel();
505 ret = -ENOENT;
506 dev = usb_get_dev(inode->u.generic_ip);
507 if (!dev) {
508 kfree(ps);
509 goto out;
510 }
511 ret = 0;
512 ps->dev = dev;
513 ps->file = file;
514 spin_lock_init(&ps->lock);
515 INIT_LIST_HEAD(&ps->async_pending);
516 INIT_LIST_HEAD(&ps->async_completed);
517 init_waitqueue_head(&ps->wait);
518 ps->discsignr = 0;
519 ps->disctask = current;
520 ps->disccontext = NULL;
521 ps->ifclaimed = 0;
522 wmb();
523 list_add_tail(&ps->list, &dev->filelist);
524 file->private_data = ps;
525 out:
526 unlock_kernel();
527 out_nolock:
528 return ret;
529 }
530
531 static int usbdev_release(struct inode *inode, struct file *file)
532 {
533 struct dev_state *ps = (struct dev_state *)file->private_data;
534 struct usb_device *dev = ps->dev;
535 unsigned int ifnum;
536
537 usb_lock_device(dev);
538 list_del_init(&ps->list);
539 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
540 ifnum++) {
541 if (test_bit(ifnum, &ps->ifclaimed))
542 releaseintf(ps, ifnum);
543 }
544 destroy_all_async(ps);
545 usb_unlock_device(dev);
546 usb_put_dev(dev);
547 ps->dev = NULL;
548 kfree(ps);
549 return 0;
550 }
551
552 static int proc_control(struct dev_state *ps, void __user *arg)
553 {
554 struct usb_device *dev = ps->dev;
555 struct usbdevfs_ctrltransfer ctrl;
556 unsigned int tmo;
557 unsigned char *tbuf;
558 int i, j, ret;
559
560 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
561 return -EFAULT;
562 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
563 return ret;
564 if (ctrl.wLength > PAGE_SIZE)
565 return -EINVAL;
566 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
567 return -ENOMEM;
568 tmo = (ctrl.timeout * HZ + 999) / 1000;
569 if (ctrl.bRequestType & 0x80) {
570 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
571 free_page((unsigned long)tbuf);
572 return -EINVAL;
573 }
574 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
575 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
576
577 usb_unlock_device(dev);
578 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
579 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
580 usb_lock_device(dev);
581 if ((i > 0) && ctrl.wLength) {
582 if (usbfs_snoop) {
583 dev_info(&dev->dev, "control read: data ");
584 for (j = 0; j < ctrl.wLength; ++j)
585 printk ("%02x ", (unsigned char)(tbuf)[j]);
586 printk("\n");
587 }
588 if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) {
589 free_page((unsigned long)tbuf);
590 return -EFAULT;
591 }
592 }
593 } else {
594 if (ctrl.wLength) {
595 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
596 free_page((unsigned long)tbuf);
597 return -EFAULT;
598 }
599 }
600 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
601 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
602 if (usbfs_snoop) {
603 dev_info(&dev->dev, "control write: data: ");
604 for (j = 0; j < ctrl.wLength; ++j)
605 printk ("%02x ", (unsigned char)(tbuf)[j]);
606 printk("\n");
607 }
608 usb_unlock_device(dev);
609 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
610 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
611 usb_lock_device(dev);
612 }
613 free_page((unsigned long)tbuf);
614 if (i<0 && i != -EPIPE) {
615 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
616 "failed cmd %s rqt %u rq %u len %u ret %d\n",
617 current->comm, ctrl.bRequestType, ctrl.bRequest,
618 ctrl.wLength, i);
619 }
620 return i;
621 }
622
623 static int proc_bulk(struct dev_state *ps, void __user *arg)
624 {
625 struct usb_device *dev = ps->dev;
626 struct usbdevfs_bulktransfer bulk;
627 unsigned int tmo, len1, pipe;
628 int len2;
629 unsigned char *tbuf;
630 int i, ret;
631
632 if (copy_from_user(&bulk, arg, sizeof(bulk)))
633 return -EFAULT;
634 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
635 return ret;
636 if ((ret = checkintf(ps, ret)))
637 return ret;
638 if (bulk.ep & USB_DIR_IN)
639 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
640 else
641 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
642 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
643 return -EINVAL;
644 len1 = bulk.len;
645 if (len1 > MAX_USBFS_BUFFER_SIZE)
646 return -EINVAL;
647 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
648 return -ENOMEM;
649 tmo = (bulk.timeout * HZ + 999) / 1000;
650 if (bulk.ep & 0x80) {
651 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
652 kfree(tbuf);
653 return -EINVAL;
654 }
655 usb_unlock_device(dev);
656 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
657 usb_lock_device(dev);
658 if (!i && len2) {
659 if (copy_to_user(bulk.data, tbuf, len2)) {
660 kfree(tbuf);
661 return -EFAULT;
662 }
663 }
664 } else {
665 if (len1) {
666 if (copy_from_user(tbuf, bulk.data, len1)) {
667 kfree(tbuf);
668 return -EFAULT;
669 }
670 }
671 usb_unlock_device(dev);
672 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
673 usb_lock_device(dev);
674 }
675 kfree(tbuf);
676 if (i < 0) {
677 dev_warn(&dev->dev, "usbfs: USBDEVFS_BULK failed "
678 "ep 0x%x len %u ret %d\n", bulk.ep, bulk.len, i);
679 return i;
680 }
681 return len2;
682 }
683
684 static int proc_resetep(struct dev_state *ps, void __user *arg)
685 {
686 unsigned int ep;
687 int ret;
688
689 if (get_user(ep, (unsigned int __user *)arg))
690 return -EFAULT;
691 if ((ret = findintfep(ps->dev, ep)) < 0)
692 return ret;
693 if ((ret = checkintf(ps, ret)))
694 return ret;
695 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
696 return 0;
697 }
698
699 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
700 {
701 unsigned int ep;
702 int pipe;
703 int ret;
704
705 if (get_user(ep, (unsigned int __user *)arg))
706 return -EFAULT;
707 if ((ret = findintfep(ps->dev, ep)) < 0)
708 return ret;
709 if ((ret = checkintf(ps, ret)))
710 return ret;
711 if (ep & USB_DIR_IN)
712 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
713 else
714 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
715
716 return usb_clear_halt(ps->dev, pipe);
717 }
718
719
720 static int proc_getdriver(struct dev_state *ps, void __user *arg)
721 {
722 struct usbdevfs_getdriver gd;
723 struct usb_interface *intf;
724 int ret;
725
726 if (copy_from_user(&gd, arg, sizeof(gd)))
727 return -EFAULT;
728 down_read(&usb_bus_type.subsys.rwsem);
729 intf = usb_ifnum_to_if(ps->dev, gd.interface);
730 if (!intf || !intf->dev.driver)
731 ret = -ENODATA;
732 else {
733 strncpy(gd.driver, intf->dev.driver->name,
734 sizeof(gd.driver));
735 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
736 }
737 up_read(&usb_bus_type.subsys.rwsem);
738 return ret;
739 }
740
741 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
742 {
743 struct usbdevfs_connectinfo ci;
744
745 ci.devnum = ps->dev->devnum;
746 ci.slow = ps->dev->speed == USB_SPEED_LOW;
747 if (copy_to_user(arg, &ci, sizeof(ci)))
748 return -EFAULT;
749 return 0;
750 }
751
752 static int proc_resetdevice(struct dev_state *ps)
753 {
754 return usb_reset_device(ps->dev);
755
756 }
757
758 static int proc_setintf(struct dev_state *ps, void __user *arg)
759 {
760 struct usbdevfs_setinterface setintf;
761 int ret;
762
763 if (copy_from_user(&setintf, arg, sizeof(setintf)))
764 return -EFAULT;
765 if ((ret = checkintf(ps, setintf.interface)))
766 return ret;
767 return usb_set_interface(ps->dev, setintf.interface,
768 setintf.altsetting);
769 }
770
771 static int proc_setconfig(struct dev_state *ps, void __user *arg)
772 {
773 unsigned int u;
774 int status = 0;
775 struct usb_host_config *actconfig;
776
777 if (get_user(u, (unsigned int __user *)arg))
778 return -EFAULT;
779
780 actconfig = ps->dev->actconfig;
781
782 /* Don't touch the device if any interfaces are claimed.
783 * It could interfere with other drivers' operations, and if
784 * an interface is claimed by usbfs it could easily deadlock.
785 */
786 if (actconfig) {
787 int i;
788
789 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
790 if (usb_interface_claimed(actconfig->interface[i])) {
791 dev_warn (&ps->dev->dev,
792 "usbfs: interface %d claimed "
793 "while '%s' sets config #%d\n",
794 actconfig->interface[i]
795 ->cur_altsetting
796 ->desc.bInterfaceNumber,
797 current->comm, u);
798 #if 0 /* FIXME: enable in 2.6.10 or so */
799 status = -EBUSY;
800 break;
801 #endif
802 }
803 }
804 }
805
806 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
807 * so avoid usb_set_configuration()'s kick to sysfs
808 */
809 if (status == 0) {
810 if (actconfig && actconfig->desc.bConfigurationValue == u)
811 status = usb_reset_configuration(ps->dev);
812 else
813 status = usb_set_configuration(ps->dev, u);
814 }
815
816 return status;
817 }
818
819 static int proc_submiturb(struct dev_state *ps, void __user *arg)
820 {
821 struct usbdevfs_urb uurb;
822 struct usbdevfs_iso_packet_desc *isopkt = NULL;
823 struct usb_host_endpoint *ep;
824 struct async *as;
825 struct usb_ctrlrequest *dr = NULL;
826 unsigned int u, totlen, isofrmlen;
827 int ret, interval = 0, ifnum = -1;
828
829 if (copy_from_user(&uurb, arg, sizeof(uurb)))
830 return -EFAULT;
831 if (uurb.flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
832 URB_NO_FSBR|URB_ZERO_PACKET))
833 return -EINVAL;
834 if (!uurb.buffer)
835 return -EINVAL;
836 if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX))
837 return -EINVAL;
838 if (!(uurb.type == USBDEVFS_URB_TYPE_CONTROL && (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
839 if ((ifnum = findintfep(ps->dev, uurb.endpoint)) < 0)
840 return ifnum;
841 if ((ret = checkintf(ps, ifnum)))
842 return ret;
843 }
844 if ((uurb.endpoint & USB_ENDPOINT_DIR_MASK) != 0)
845 ep = ps->dev->ep_in [uurb.endpoint & USB_ENDPOINT_NUMBER_MASK];
846 else
847 ep = ps->dev->ep_out [uurb.endpoint & USB_ENDPOINT_NUMBER_MASK];
848 if (!ep)
849 return -ENOENT;
850 switch(uurb.type) {
851 case USBDEVFS_URB_TYPE_CONTROL:
852 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
853 != USB_ENDPOINT_XFER_CONTROL)
854 return -EINVAL;
855 /* min 8 byte setup packet, max arbitrary */
856 if (uurb.buffer_length < 8 || uurb.buffer_length > PAGE_SIZE)
857 return -EINVAL;
858 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
859 return -ENOMEM;
860 if (copy_from_user(dr, uurb.buffer, 8)) {
861 kfree(dr);
862 return -EFAULT;
863 }
864 if (uurb.buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
865 kfree(dr);
866 return -EINVAL;
867 }
868 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
869 kfree(dr);
870 return ret;
871 }
872 uurb.endpoint = (uurb.endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
873 uurb.number_of_packets = 0;
874 uurb.buffer_length = le16_to_cpup(&dr->wLength);
875 uurb.buffer += 8;
876 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length)) {
877 kfree(dr);
878 return -EFAULT;
879 }
880 break;
881
882 case USBDEVFS_URB_TYPE_BULK:
883 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
884 case USB_ENDPOINT_XFER_CONTROL:
885 case USB_ENDPOINT_XFER_ISOC:
886 return -EINVAL;
887 /* allow single-shot interrupt transfers, at bogus rates */
888 }
889 uurb.number_of_packets = 0;
890 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
891 return -EINVAL;
892 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
893 return -EFAULT;
894 break;
895
896 case USBDEVFS_URB_TYPE_ISO:
897 /* arbitrary limit */
898 if (uurb.number_of_packets < 1 || uurb.number_of_packets > 128)
899 return -EINVAL;
900 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
901 != USB_ENDPOINT_XFER_ISOC)
902 return -EINVAL;
903 interval = 1 << min (15, ep->desc.bInterval - 1);
904 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb.number_of_packets;
905 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
906 return -ENOMEM;
907 if (copy_from_user(isopkt, &((struct usbdevfs_urb __user *)arg)->iso_frame_desc, isofrmlen)) {
908 kfree(isopkt);
909 return -EFAULT;
910 }
911 for (totlen = u = 0; u < uurb.number_of_packets; u++) {
912 if (isopkt[u].length > 1023) {
913 kfree(isopkt);
914 return -EINVAL;
915 }
916 totlen += isopkt[u].length;
917 }
918 if (totlen > 32768) {
919 kfree(isopkt);
920 return -EINVAL;
921 }
922 uurb.buffer_length = totlen;
923 break;
924
925 case USBDEVFS_URB_TYPE_INTERRUPT:
926 uurb.number_of_packets = 0;
927 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
928 != USB_ENDPOINT_XFER_INT)
929 return -EINVAL;
930 if (ps->dev->speed == USB_SPEED_HIGH)
931 interval = 1 << min (15, ep->desc.bInterval - 1);
932 else
933 interval = ep->desc.bInterval;
934 if (uurb.buffer_length > MAX_USBFS_BUFFER_SIZE)
935 return -EINVAL;
936 if (!access_ok((uurb.endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb.buffer, uurb.buffer_length))
937 return -EFAULT;
938 break;
939
940 default:
941 return -EINVAL;
942 }
943 if (!(as = alloc_async(uurb.number_of_packets))) {
944 if (isopkt)
945 kfree(isopkt);
946 if (dr)
947 kfree(dr);
948 return -ENOMEM;
949 }
950 if (!(as->urb->transfer_buffer = kmalloc(uurb.buffer_length, GFP_KERNEL))) {
951 if (isopkt)
952 kfree(isopkt);
953 if (dr)
954 kfree(dr);
955 free_async(as);
956 return -ENOMEM;
957 }
958 as->urb->dev = ps->dev;
959 as->urb->pipe = (uurb.type << 30) | __create_pipe(ps->dev, uurb.endpoint & 0xf) | (uurb.endpoint & USB_DIR_IN);
960 as->urb->transfer_flags = uurb.flags;
961 as->urb->transfer_buffer_length = uurb.buffer_length;
962 as->urb->setup_packet = (unsigned char*)dr;
963 as->urb->start_frame = uurb.start_frame;
964 as->urb->number_of_packets = uurb.number_of_packets;
965 as->urb->interval = interval;
966 as->urb->context = as;
967 as->urb->complete = async_completed;
968 for (totlen = u = 0; u < uurb.number_of_packets; u++) {
969 as->urb->iso_frame_desc[u].offset = totlen;
970 as->urb->iso_frame_desc[u].length = isopkt[u].length;
971 totlen += isopkt[u].length;
972 }
973 if (isopkt)
974 kfree(isopkt);
975 as->ps = ps;
976 as->userurb = arg;
977 if (uurb.endpoint & USB_DIR_IN)
978 as->userbuffer = uurb.buffer;
979 else
980 as->userbuffer = NULL;
981 as->signr = uurb.signr;
982 as->ifnum = ifnum;
983 as->task = current;
984 if (!(uurb.endpoint & USB_DIR_IN)) {
985 if (copy_from_user(as->urb->transfer_buffer, uurb.buffer, as->urb->transfer_buffer_length)) {
986 free_async(as);
987 return -EFAULT;
988 }
989 }
990 async_newpending(as);
991 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
992 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
993 async_removepending(as);
994 free_async(as);
995 return ret;
996 }
997 return 0;
998 }
999
1000 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1001 {
1002 struct async *as;
1003
1004 as = async_getpending(ps, arg);
1005 if (!as)
1006 return -EINVAL;
1007 usb_kill_urb(as->urb);
1008 return 0;
1009 }
1010
1011 static int processcompl(struct async *as)
1012 {
1013 struct urb *urb = as->urb;
1014 struct usbdevfs_urb __user *userurb = as->userurb;
1015 unsigned int i;
1016
1017 if (as->userbuffer)
1018 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1019 return -EFAULT;
1020 if (put_user(urb->status, &userurb->status))
1021 return -EFAULT;
1022 if (put_user(urb->actual_length, &userurb->actual_length))
1023 return -EFAULT;
1024 if (put_user(urb->error_count, &userurb->error_count))
1025 return -EFAULT;
1026
1027 if (!(usb_pipeisoc(urb->pipe)))
1028 return 0;
1029 for (i = 0; i < urb->number_of_packets; i++) {
1030 if (put_user(urb->iso_frame_desc[i].actual_length,
1031 &userurb->iso_frame_desc[i].actual_length))
1032 return -EFAULT;
1033 if (put_user(urb->iso_frame_desc[i].status,
1034 &userurb->iso_frame_desc[i].status))
1035 return -EFAULT;
1036 }
1037 return 0;
1038 }
1039
1040 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1041 {
1042 DECLARE_WAITQUEUE(wait, current);
1043 struct async *as = NULL;
1044 void __user *addr;
1045 struct usb_device *dev = ps->dev;
1046 int ret;
1047
1048 add_wait_queue(&ps->wait, &wait);
1049 for (;;) {
1050 __set_current_state(TASK_INTERRUPTIBLE);
1051 if ((as = async_getcompleted(ps)))
1052 break;
1053 if (signal_pending(current))
1054 break;
1055 usb_unlock_device(dev);
1056 schedule();
1057 usb_lock_device(dev);
1058 }
1059 remove_wait_queue(&ps->wait, &wait);
1060 set_current_state(TASK_RUNNING);
1061 if (as) {
1062 ret = processcompl(as);
1063 addr = as->userurb;
1064 free_async(as);
1065 if (ret)
1066 return ret;
1067 if (put_user(addr, (void __user * __user *)arg))
1068 return -EFAULT;
1069 return 0;
1070 }
1071 if (signal_pending(current))
1072 return -EINTR;
1073 return -EIO;
1074 }
1075
1076 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1077 {
1078 struct async *as;
1079 void __user *addr;
1080 int ret;
1081
1082 if (!(as = async_getcompleted(ps)))
1083 return -EAGAIN;
1084 ret = processcompl(as);
1085 addr = as->userurb;
1086 free_async(as);
1087 if (ret)
1088 return ret;
1089 if (put_user(addr, (void __user * __user *)arg))
1090 return -EFAULT;
1091 return 0;
1092 }
1093
1094 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1095 {
1096 struct usbdevfs_disconnectsignal ds;
1097
1098 if (copy_from_user(&ds, arg, sizeof(ds)))
1099 return -EFAULT;
1100 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1101 return -EINVAL;
1102 ps->discsignr = ds.signr;
1103 ps->disccontext = ds.context;
1104 return 0;
1105 }
1106
1107 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1108 {
1109 unsigned int ifnum;
1110
1111 if (get_user(ifnum, (unsigned int __user *)arg))
1112 return -EFAULT;
1113 return claimintf(ps, ifnum);
1114 }
1115
1116 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1117 {
1118 unsigned int ifnum;
1119 int ret;
1120
1121 if (get_user(ifnum, (unsigned int __user *)arg))
1122 return -EFAULT;
1123 if ((ret = releaseintf(ps, ifnum)) < 0)
1124 return ret;
1125 destroy_async_on_interface (ps, ifnum);
1126 return 0;
1127 }
1128
1129 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1130 {
1131 struct usbdevfs_ioctl ctrl;
1132 int size;
1133 void *buf = NULL;
1134 int retval = 0;
1135 struct usb_interface *intf = NULL;
1136 struct usb_driver *driver = NULL;
1137 int i;
1138
1139 /* get input parameters and alloc buffer */
1140 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1141 return -EFAULT;
1142 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1143 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1144 return -ENOMEM;
1145 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1146 if (copy_from_user (buf, ctrl.data, size)) {
1147 kfree (buf);
1148 return -EFAULT;
1149 }
1150 } else {
1151 memset (buf, 0, size);
1152 }
1153 }
1154
1155 if (!connected(ps->dev)) {
1156 if (buf)
1157 kfree(buf);
1158 return -ENODEV;
1159 }
1160
1161 if (ps->dev->state != USB_STATE_CONFIGURED)
1162 retval = -EHOSTUNREACH;
1163 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1164 retval = -EINVAL;
1165 else switch (ctrl.ioctl_code) {
1166
1167 /* disconnect kernel driver from interface */
1168 case USBDEVFS_DISCONNECT:
1169
1170 /* don't allow the user to unbind the hub driver from
1171 * a hub with children to manage */
1172 for (i = 0; i < ps->dev->maxchild; ++i) {
1173 if (ps->dev->children[i])
1174 retval = -EBUSY;
1175 }
1176 if (retval)
1177 break;
1178
1179 down_write(&usb_bus_type.subsys.rwsem);
1180 if (intf->dev.driver) {
1181 driver = to_usb_driver(intf->dev.driver);
1182 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1183 usb_driver_release_interface(driver, intf);
1184 } else
1185 retval = -ENODATA;
1186 up_write(&usb_bus_type.subsys.rwsem);
1187 break;
1188
1189 /* let kernel drivers try to (re)bind to the interface */
1190 case USBDEVFS_CONNECT:
1191 usb_unlock_device(ps->dev);
1192 usb_lock_all_devices();
1193 bus_rescan_devices(intf->dev.bus);
1194 usb_unlock_all_devices();
1195 usb_lock_device(ps->dev);
1196 break;
1197
1198 /* talk directly to the interface's driver */
1199 default:
1200 down_read(&usb_bus_type.subsys.rwsem);
1201 if (intf->dev.driver)
1202 driver = to_usb_driver(intf->dev.driver);
1203 if (driver == NULL || driver->ioctl == NULL) {
1204 retval = -ENOTTY;
1205 } else {
1206 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1207 if (retval == -ENOIOCTLCMD)
1208 retval = -ENOTTY;
1209 }
1210 up_read(&usb_bus_type.subsys.rwsem);
1211 }
1212
1213 /* cleanup and return */
1214 if (retval >= 0
1215 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1216 && size > 0
1217 && copy_to_user (ctrl.data, buf, size) != 0)
1218 retval = -EFAULT;
1219 if (buf != NULL)
1220 kfree (buf);
1221 return retval;
1222 }
1223
1224 /*
1225 * NOTE: All requests here that have interface numbers as parameters
1226 * are assuming that somehow the configuration has been prevented from
1227 * changing. But there's no mechanism to ensure that...
1228 */
1229 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1230 {
1231 struct dev_state *ps = (struct dev_state *)file->private_data;
1232 struct usb_device *dev = ps->dev;
1233 void __user *p = (void __user *)arg;
1234 int ret = -ENOTTY;
1235
1236 if (!(file->f_mode & FMODE_WRITE))
1237 return -EPERM;
1238 usb_lock_device(dev);
1239 if (!connected(dev)) {
1240 usb_unlock_device(dev);
1241 return -ENODEV;
1242 }
1243
1244 switch (cmd) {
1245 case USBDEVFS_CONTROL:
1246 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1247 ret = proc_control(ps, p);
1248 if (ret >= 0)
1249 inode->i_mtime = CURRENT_TIME;
1250 break;
1251
1252 case USBDEVFS_BULK:
1253 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1254 ret = proc_bulk(ps, p);
1255 if (ret >= 0)
1256 inode->i_mtime = CURRENT_TIME;
1257 break;
1258
1259 case USBDEVFS_RESETEP:
1260 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1261 ret = proc_resetep(ps, p);
1262 if (ret >= 0)
1263 inode->i_mtime = CURRENT_TIME;
1264 break;
1265
1266 case USBDEVFS_RESET:
1267 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1268 ret = proc_resetdevice(ps);
1269 break;
1270
1271 case USBDEVFS_CLEAR_HALT:
1272 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1273 ret = proc_clearhalt(ps, p);
1274 if (ret >= 0)
1275 inode->i_mtime = CURRENT_TIME;
1276 break;
1277
1278 case USBDEVFS_GETDRIVER:
1279 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1280 ret = proc_getdriver(ps, p);
1281 break;
1282
1283 case USBDEVFS_CONNECTINFO:
1284 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1285 ret = proc_connectinfo(ps, p);
1286 break;
1287
1288 case USBDEVFS_SETINTERFACE:
1289 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1290 ret = proc_setintf(ps, p);
1291 break;
1292
1293 case USBDEVFS_SETCONFIGURATION:
1294 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1295 ret = proc_setconfig(ps, p);
1296 break;
1297
1298 case USBDEVFS_SUBMITURB:
1299 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1300 ret = proc_submiturb(ps, p);
1301 if (ret >= 0)
1302 inode->i_mtime = CURRENT_TIME;
1303 break;
1304
1305 case USBDEVFS_DISCARDURB:
1306 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1307 ret = proc_unlinkurb(ps, p);
1308 break;
1309
1310 case USBDEVFS_REAPURB:
1311 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1312 ret = proc_reapurb(ps, p);
1313 break;
1314
1315 case USBDEVFS_REAPURBNDELAY:
1316 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1317 ret = proc_reapurbnonblock(ps, p);
1318 break;
1319
1320 case USBDEVFS_DISCSIGNAL:
1321 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1322 ret = proc_disconnectsignal(ps, p);
1323 break;
1324
1325 case USBDEVFS_CLAIMINTERFACE:
1326 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1327 ret = proc_claiminterface(ps, p);
1328 break;
1329
1330 case USBDEVFS_RELEASEINTERFACE:
1331 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1332 ret = proc_releaseinterface(ps, p);
1333 break;
1334
1335 case USBDEVFS_IOCTL:
1336 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1337 ret = proc_ioctl(ps, p);
1338 break;
1339 }
1340 usb_unlock_device(dev);
1341 if (ret >= 0)
1342 inode->i_atime = CURRENT_TIME;
1343 return ret;
1344 }
1345
1346 /* No kernel lock - fine */
1347 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1348 {
1349 struct dev_state *ps = (struct dev_state *)file->private_data;
1350 unsigned int mask = 0;
1351
1352 poll_wait(file, &ps->wait, wait);
1353 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1354 mask |= POLLOUT | POLLWRNORM;
1355 if (!connected(ps->dev))
1356 mask |= POLLERR | POLLHUP;
1357 return mask;
1358 }
1359
1360 struct file_operations usbfs_device_file_operations = {
1361 .llseek = usbdev_lseek,
1362 .read = usbdev_read,
1363 .poll = usbdev_poll,
1364 .ioctl = usbdev_ioctl,
1365 .open = usbdev_open,
1366 .release = usbdev_release,
1367 };
1368
|
This page was automatically generated by the
LXR engine.
|