projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'core/printk' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux...
[GitHub/mt8127/android_kernel_alcatel_ttab.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 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
34 * (CAN-2005-3055)
35 */
36
37 /*****************************************************************************/
38
39 #include <linux/fs.h>
40 #include <linux/mm.h>
41 #include <linux/slab.h>
42 #include <linux/smp_lock.h>
43 #include <linux/signal.h>
44 #include <linux/poll.h>
45 #include <linux/module.h>
46 #include <linux/usb.h>
47 #include <linux/usbdevice_fs.h>
48 #include <linux/cdev.h>
49 #include <linux/notifier.h>
50 #include <linux/security.h>
51 #include <asm/uaccess.h>
52 #include <asm/byteorder.h>
53 #include <linux/moduleparam.h>
54
55 #include "hcd.h" /* for usbcore internals */
56 #include "usb.h"
57
58 #define USB_MAXBUS 64
59 #define USB_DEVICE_MAX USB_MAXBUS * 128
60
61 /* Mutual exclusion for removal, open, and release */
62 DEFINE_MUTEX(usbfs_mutex);
63
64 struct async {
65 struct list_head asynclist;
66 struct dev_state *ps;
67 struct pid *pid;
68 uid_t uid, euid;
69 unsigned int signr;
70 unsigned int ifnum;
71 void __user *userbuffer;
72 void __user *userurb;
73 struct urb *urb;
74 int status;
75 u32 secid;
76 };
77
78 static int usbfs_snoop;
79 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
80 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
81
82 #define snoop(dev, format, arg...) \
83 do { \
84 if (usbfs_snoop) \
85 dev_info(dev , format , ## arg); \
86 } while (0)
87
88 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
89
90
91 #define MAX_USBFS_BUFFER_SIZE 16384
92
93 static inline int connected(struct dev_state *ps)
94 {
95 return (!list_empty(&ps->list) &&
96 ps->dev->state != USB_STATE_NOTATTACHED);
97 }
98
99 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
100 {
101 loff_t ret;
102
103 lock_kernel();
104
105 switch (orig) {
106 case 0:
107 file->f_pos = offset;
108 ret = file->f_pos;
109 break;
110 case 1:
111 file->f_pos += offset;
112 ret = file->f_pos;
113 break;
114 case 2:
115 default:
116 ret = -EINVAL;
117 }
118
119 unlock_kernel();
120 return ret;
121 }
122
123 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
124 loff_t *ppos)
125 {
126 struct dev_state *ps = file->private_data;
127 struct usb_device *dev = ps->dev;
128 ssize_t ret = 0;
129 unsigned len;
130 loff_t pos;
131 int i;
132
133 pos = *ppos;
134 usb_lock_device(dev);
135 if (!connected(ps)) {
136 ret = -ENODEV;
137 goto err;
138 } else if (pos < 0) {
139 ret = -EINVAL;
140 goto err;
141 }
142
143 if (pos < sizeof(struct usb_device_descriptor)) {
144 /* 18 bytes - fits on the stack */
145 struct usb_device_descriptor temp_desc;
146
147 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
148 le16_to_cpus(&temp_desc.bcdUSB);
149 le16_to_cpus(&temp_desc.idVendor);
150 le16_to_cpus(&temp_desc.idProduct);
151 le16_to_cpus(&temp_desc.bcdDevice);
152
153 len = sizeof(struct usb_device_descriptor) - pos;
154 if (len > nbytes)
155 len = nbytes;
156 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
157 ret = -EFAULT;
158 goto err;
159 }
160
161 *ppos += len;
162 buf += len;
163 nbytes -= len;
164 ret += len;
165 }
166
167 pos = sizeof(struct usb_device_descriptor);
168 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
169 struct usb_config_descriptor *config =
170 (struct usb_config_descriptor *)dev->rawdescriptors[i];
171 unsigned int length = le16_to_cpu(config->wTotalLength);
172
173 if (*ppos < pos + length) {
174
175 /* The descriptor may claim to be longer than it
176 * really is. Here is the actual allocated length. */
177 unsigned alloclen =
178 le16_to_cpu(dev->config[i].desc.wTotalLength);
179
180 len = length - (*ppos - pos);
181 if (len > nbytes)
182 len = nbytes;
183
184 /* Simply don't write (skip over) unallocated parts */
185 if (alloclen > (*ppos - pos)) {
186 alloclen -= (*ppos - pos);
187 if (copy_to_user(buf,
188 dev->rawdescriptors[i] + (*ppos - pos),
189 min(len, alloclen))) {
190 ret = -EFAULT;
191 goto err;
192 }
193 }
194
195 *ppos += len;
196 buf += len;
197 nbytes -= len;
198 ret += len;
199 }
200
201 pos += length;
202 }
203
204 err:
205 usb_unlock_device(dev);
206 return ret;
207 }
208
209 /*
210 * async list handling
211 */
212
213 static struct async *alloc_async(unsigned int numisoframes)
214 {
215 struct async *as;
216
217 as = kzalloc(sizeof(struct async), GFP_KERNEL);
218 if (!as)
219 return NULL;
220 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
221 if (!as->urb) {
222 kfree(as);
223 return NULL;
224 }
225 return as;
226 }
227
228 static void free_async(struct async *as)
229 {
230 put_pid(as->pid);
231 kfree(as->urb->transfer_buffer);
232 kfree(as->urb->setup_packet);
233 usb_free_urb(as->urb);
234 kfree(as);
235 }
236
237 static inline void async_newpending(struct async *as)
238 {
239 struct dev_state *ps = as->ps;
240 unsigned long flags;
241
242 spin_lock_irqsave(&ps->lock, flags);
243 list_add_tail(&as->asynclist, &ps->async_pending);
244 spin_unlock_irqrestore(&ps->lock, flags);
245 }
246
247 static inline void async_removepending(struct async *as)
248 {
249 struct dev_state *ps = as->ps;
250 unsigned long flags;
251
252 spin_lock_irqsave(&ps->lock, flags);
253 list_del_init(&as->asynclist);
254 spin_unlock_irqrestore(&ps->lock, flags);
255 }
256
257 static inline struct async *async_getcompleted(struct dev_state *ps)
258 {
259 unsigned long flags;
260 struct async *as = NULL;
261
262 spin_lock_irqsave(&ps->lock, flags);
263 if (!list_empty(&ps->async_completed)) {
264 as = list_entry(ps->async_completed.next, struct async,
265 asynclist);
266 list_del_init(&as->asynclist);
267 }
268 spin_unlock_irqrestore(&ps->lock, flags);
269 return as;
270 }
271
272 static inline struct async *async_getpending(struct dev_state *ps,
273 void __user *userurb)
274 {
275 unsigned long flags;
276 struct async *as;
277
278 spin_lock_irqsave(&ps->lock, flags);
279 list_for_each_entry(as, &ps->async_pending, asynclist)
280 if (as->userurb == userurb) {
281 list_del_init(&as->asynclist);
282 spin_unlock_irqrestore(&ps->lock, flags);
283 return as;
284 }
285 spin_unlock_irqrestore(&ps->lock, flags);
286 return NULL;
287 }
288
289 static void snoop_urb(struct urb *urb, void __user *userurb)
290 {
291 int j;
292 unsigned char *data = urb->transfer_buffer;
293
294 if (!usbfs_snoop)
295 return;
296
297 dev_info(&urb->dev->dev, "direction=%s\n",
298 usb_urb_dir_in(urb) ? "IN" : "OUT");
299 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
300 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
301 urb->transfer_buffer_length);
302 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
303 dev_info(&urb->dev->dev, "data: ");
304 for (j = 0; j < urb->transfer_buffer_length; ++j)
305 printk("%02x ", data[j]);
306 printk("\n");
307 }
308
309 static void async_completed(struct urb *urb)
310 {
311 struct async *as = urb->context;
312 struct dev_state *ps = as->ps;
313 struct siginfo sinfo;
314
315 spin_lock(&ps->lock);
316 list_move_tail(&as->asynclist, &ps->async_completed);
317 spin_unlock(&ps->lock);
318 as->status = urb->status;
319 if (as->signr) {
320 sinfo.si_signo = as->signr;
321 sinfo.si_errno = as->status;
322 sinfo.si_code = SI_ASYNCIO;
323 sinfo.si_addr = as->userurb;
324 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
325 as->euid, as->secid);
326 }
327 snoop(&urb->dev->dev, "urb complete\n");
328 snoop_urb(urb, as->userurb);
329 wake_up(&ps->wait);
330 }
331
332 static void destroy_async(struct dev_state *ps, struct list_head *list)
333 {
334 struct async *as;
335 unsigned long flags;
336
337 spin_lock_irqsave(&ps->lock, flags);
338 while (!list_empty(list)) {
339 as = list_entry(list->next, struct async, asynclist);
340 list_del_init(&as->asynclist);
341
342 /* drop the spinlock so the completion handler can run */
343 spin_unlock_irqrestore(&ps->lock, flags);
344 usb_kill_urb(as->urb);
345 spin_lock_irqsave(&ps->lock, flags);
346 }
347 spin_unlock_irqrestore(&ps->lock, flags);
348 as = async_getcompleted(ps);
349 while (as) {
350 free_async(as);
351 as = async_getcompleted(ps);
352 }
353 }
354
355 static void destroy_async_on_interface(struct dev_state *ps,
356 unsigned int ifnum)
357 {
358 struct list_head *p, *q, hitlist;
359 unsigned long flags;
360
361 INIT_LIST_HEAD(&hitlist);
362 spin_lock_irqsave(&ps->lock, flags);
363 list_for_each_safe(p, q, &ps->async_pending)
364 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
365 list_move_tail(p, &hitlist);
366 spin_unlock_irqrestore(&ps->lock, flags);
367 destroy_async(ps, &hitlist);
368 }
369
370 static inline void destroy_all_async(struct dev_state *ps)
371 {
372 destroy_async(ps, &ps->async_pending);
373 }
374
375 /*
376 * interface claims are made only at the request of user level code,
377 * which can also release them (explicitly or by closing files).
378 * they're also undone when devices disconnect.
379 */
380
381 static int driver_probe(struct usb_interface *intf,
382 const struct usb_device_id *id)
383 {
384 return -ENODEV;
385 }
386
387 static void driver_disconnect(struct usb_interface *intf)
388 {
389 struct dev_state *ps = usb_get_intfdata(intf);
390 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
391
392 if (!ps)
393 return;
394
395 /* NOTE: this relies on usbcore having canceled and completed
396 * all pending I/O requests; 2.6 does that.
397 */
398
399 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
400 clear_bit(ifnum, &ps->ifclaimed);
401 else
402 warn("interface number %u out of range", ifnum);
403
404 usb_set_intfdata(intf, NULL);
405
406 /* force async requests to complete */
407 destroy_async_on_interface(ps, ifnum);
408 }
409
410 /* The following routines are merely placeholders. There is no way
411 * to inform a user task about suspend or resumes.
412 */
413 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
414 {
415 return 0;
416 }
417
418 static int driver_resume(struct usb_interface *intf)
419 {
420 return 0;
421 }
422
423 struct usb_driver usbfs_driver = {
424 .name = "usbfs",
425 .probe = driver_probe,
426 .disconnect = driver_disconnect,
427 .suspend = driver_suspend,
428 .resume = driver_resume,
429 };
430
431 static int claimintf(struct dev_state *ps, unsigned int ifnum)
432 {
433 struct usb_device *dev = ps->dev;
434 struct usb_interface *intf;
435 int err;
436
437 if (ifnum >= 8*sizeof(ps->ifclaimed))
438 return -EINVAL;
439 /* already claimed */
440 if (test_bit(ifnum, &ps->ifclaimed))
441 return 0;
442
443 intf = usb_ifnum_to_if(dev, ifnum);
444 if (!intf)
445 err = -ENOENT;
446 else
447 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
448 if (err == 0)
449 set_bit(ifnum, &ps->ifclaimed);
450 return err;
451 }
452
453 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
454 {
455 struct usb_device *dev;
456 struct usb_interface *intf;
457 int err;
458
459 err = -EINVAL;
460 if (ifnum >= 8*sizeof(ps->ifclaimed))
461 return err;
462 dev = ps->dev;
463 intf = usb_ifnum_to_if(dev, ifnum);
464 if (!intf)
465 err = -ENOENT;
466 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
467 usb_driver_release_interface(&usbfs_driver, intf);
468 err = 0;
469 }
470 return err;
471 }
472
473 static int checkintf(struct dev_state *ps, unsigned int ifnum)
474 {
475 if (ps->dev->state != USB_STATE_CONFIGURED)
476 return -EHOSTUNREACH;
477 if (ifnum >= 8*sizeof(ps->ifclaimed))
478 return -EINVAL;
479 if (test_bit(ifnum, &ps->ifclaimed))
480 return 0;
481 /* if not yet claimed, claim it for the driver */
482 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
483 "interface %u before use\n", task_pid_nr(current),
484 current->comm, ifnum);
485 return claimintf(ps, ifnum);
486 }
487
488 static int findintfep(struct usb_device *dev, unsigned int ep)
489 {
490 unsigned int i, j, e;
491 struct usb_interface *intf;
492 struct usb_host_interface *alts;
493 struct usb_endpoint_descriptor *endpt;
494
495 if (ep & ~(USB_DIR_IN|0xf))
496 return -EINVAL;
497 if (!dev->actconfig)
498 return -ESRCH;
499 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
500 intf = dev->actconfig->interface[i];
501 for (j = 0; j < intf->num_altsetting; j++) {
502 alts = &intf->altsetting[j];
503 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
504 endpt = &alts->endpoint[e].desc;
505 if (endpt->bEndpointAddress == ep)
506 return alts->desc.bInterfaceNumber;
507 }
508 }
509 }
510 return -ENOENT;
511 }
512
513 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
514 unsigned int index)
515 {
516 int ret = 0;
517
518 if (ps->dev->state != USB_STATE_ADDRESS
519 && ps->dev->state != USB_STATE_CONFIGURED)
520 return -EHOSTUNREACH;
521 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
522 return 0;
523
524 index &= 0xff;
525 switch (requesttype & USB_RECIP_MASK) {
526 case USB_RECIP_ENDPOINT:
527 ret = findintfep(ps->dev, index);
528 if (ret >= 0)
529 ret = checkintf(ps, ret);
530 break;
531
532 case USB_RECIP_INTERFACE:
533 ret = checkintf(ps, index);
534 break;
535 }
536 return ret;
537 }
538
539 static int __match_minor(struct device *dev, void *data)
540 {
541 int minor = *((int *)data);
542
543 if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor))
544 return 1;
545 return 0;
546 }
547
548 static struct usb_device *usbdev_lookup_by_minor(int minor)
549 {
550 struct device *dev;
551
552 dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor);
553 if (!dev)
554 return NULL;
555 put_device(dev);
556 return container_of(dev, struct usb_device, dev);
557 }
558
559 /*
560 * file operations
561 */
562 static int usbdev_open(struct inode *inode, struct file *file)
563 {
564 struct usb_device *dev = NULL;
565 struct dev_state *ps;
566 int ret;
567
568 lock_kernel();
569 /* Protect against simultaneous removal or release */
570 mutex_lock(&usbfs_mutex);
571
572 ret = -ENOMEM;
573 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
574 if (!ps)
575 goto out;
576
577 ret = -ENOENT;
578 /* usbdev device-node */
579 if (imajor(inode) == USB_DEVICE_MAJOR)
580 dev = usbdev_lookup_by_minor(iminor(inode));
581 #ifdef CONFIG_USB_DEVICEFS
582 /* procfs file */
583 if (!dev)
584 dev = inode->i_private;
585 #endif
586 if (!dev)
587 goto out;
588 ret = usb_autoresume_device(dev);
589 if (ret)
590 goto out;
591
592 usb_get_dev(dev);
593 ret = 0;
594 ps->dev = dev;
595 ps->file = file;
596 spin_lock_init(&ps->lock);
597 INIT_LIST_HEAD(&ps->list);
598 INIT_LIST_HEAD(&ps->async_pending);
599 INIT_LIST_HEAD(&ps->async_completed);
600 init_waitqueue_head(&ps->wait);
601 ps->discsignr = 0;
602 ps->disc_pid = get_pid(task_pid(current));
603 ps->disc_uid = current->uid;
604 ps->disc_euid = current->euid;
605 ps->disccontext = NULL;
606 ps->ifclaimed = 0;
607 security_task_getsecid(current, &ps->secid);
608 smp_wmb();
609 list_add_tail(&ps->list, &dev->filelist);
610 file->private_data = ps;
611 out:
612 if (ret)
613 kfree(ps);
614 mutex_unlock(&usbfs_mutex);
615 unlock_kernel();
616 return ret;
617 }
618
619 static int usbdev_release(struct inode *inode, struct file *file)
620 {
621 struct dev_state *ps = file->private_data;
622 struct usb_device *dev = ps->dev;
623 unsigned int ifnum;
624
625 usb_lock_device(dev);
626
627 /* Protect against simultaneous open */
628 mutex_lock(&usbfs_mutex);
629 list_del_init(&ps->list);
630 mutex_unlock(&usbfs_mutex);
631
632 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
633 ifnum++) {
634 if (test_bit(ifnum, &ps->ifclaimed))
635 releaseintf(ps, ifnum);
636 }
637 destroy_all_async(ps);
638 usb_autosuspend_device(dev);
639 usb_unlock_device(dev);
640 usb_put_dev(dev);
641 put_pid(ps->disc_pid);
642 kfree(ps);
643 return 0;
644 }
645
646 static int proc_control(struct dev_state *ps, void __user *arg)
647 {
648 struct usb_device *dev = ps->dev;
649 struct usbdevfs_ctrltransfer ctrl;
650 unsigned int tmo;
651 unsigned char *tbuf;
652 unsigned wLength;
653 int i, j, ret;
654
655 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
656 return -EFAULT;
657 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex);
658 if (ret)
659 return ret;
660 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
661 if (wLength > PAGE_SIZE)
662 return -EINVAL;
663 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
664 if (!tbuf)
665 return -ENOMEM;
666 tmo = ctrl.timeout;
667 if (ctrl.bRequestType & 0x80) {
668 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
669 ctrl.wLength)) {
670 free_page((unsigned long)tbuf);
671 return -EINVAL;
672 }
673 snoop(&dev->dev, "control read: bRequest=%02x "
674 "bRrequestType=%02x wValue=%04x "
675 "wIndex=%04x wLength=%04x\n",
676 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
677 ctrl.wIndex, ctrl.wLength);
678
679 usb_unlock_device(dev);
680 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest,
681 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
682 tbuf, ctrl.wLength, tmo);
683 usb_lock_device(dev);
684 if ((i > 0) && ctrl.wLength) {
685 if (usbfs_snoop) {
686 dev_info(&dev->dev, "control read: data ");
687 for (j = 0; j < i; ++j)
688 printk("%02x ", (u8)(tbuf)[j]);
689 printk("\n");
690 }
691 if (copy_to_user(ctrl.data, tbuf, i)) {
692 free_page((unsigned long)tbuf);
693 return -EFAULT;
694 }
695 }
696 } else {
697 if (ctrl.wLength) {
698 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
699 free_page((unsigned long)tbuf);
700 return -EFAULT;
701 }
702 }
703 snoop(&dev->dev, "control write: bRequest=%02x "
704 "bRrequestType=%02x wValue=%04x "
705 "wIndex=%04x wLength=%04x\n",
706 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
707 ctrl.wIndex, ctrl.wLength);
708 if (usbfs_snoop) {
709 dev_info(&dev->dev, "control write: data: ");
710 for (j = 0; j < ctrl.wLength; ++j)
711 printk("%02x ", (unsigned char)(tbuf)[j]);
712 printk("\n");
713 }
714 usb_unlock_device(dev);
715 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
716 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
717 tbuf, ctrl.wLength, tmo);
718 usb_lock_device(dev);
719 }
720 free_page((unsigned long)tbuf);
721 if (i < 0 && i != -EPIPE) {
722 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
723 "failed cmd %s rqt %u rq %u len %u ret %d\n",
724 current->comm, ctrl.bRequestType, ctrl.bRequest,
725 ctrl.wLength, i);
726 }
727 return i;
728 }
729
730 static int proc_bulk(struct dev_state *ps, void __user *arg)
731 {
732 struct usb_device *dev = ps->dev;
733 struct usbdevfs_bulktransfer bulk;
734 unsigned int tmo, len1, pipe;
735 int len2;
736 unsigned char *tbuf;
737 int i, j, ret;
738
739 if (copy_from_user(&bulk, arg, sizeof(bulk)))
740 return -EFAULT;
741 ret = findintfep(ps->dev, bulk.ep);
742 if (ret < 0)
743 return ret;
744 ret = checkintf(ps, ret);
745 if (ret)
746 return ret;
747 if (bulk.ep & USB_DIR_IN)
748 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
749 else
750 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
751 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
752 return -EINVAL;
753 len1 = bulk.len;
754 if (len1 > MAX_USBFS_BUFFER_SIZE)
755 return -EINVAL;
756 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
757 return -ENOMEM;
758 tmo = bulk.timeout;
759 if (bulk.ep & 0x80) {
760 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
761 kfree(tbuf);
762 return -EINVAL;
763 }
764 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
765 bulk.len, bulk.timeout);
766 usb_unlock_device(dev);
767 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
768 usb_lock_device(dev);
769 if (!i && len2) {
770 if (usbfs_snoop) {
771 dev_info(&dev->dev, "bulk read: data ");
772 for (j = 0; j < len2; ++j)
773 printk("%02x ", (u8)(tbuf)[j]);
774 printk("\n");
775 }
776 if (copy_to_user(bulk.data, tbuf, len2)) {
777 kfree(tbuf);
778 return -EFAULT;
779 }
780 }
781 } else {
782 if (len1) {
783 if (copy_from_user(tbuf, bulk.data, len1)) {
784 kfree(tbuf);
785 return -EFAULT;
786 }
787 }
788 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
789 bulk.len, bulk.timeout);
790 if (usbfs_snoop) {
791 dev_info(&dev->dev, "bulk write: data: ");
792 for (j = 0; j < len1; ++j)
793 printk("%02x ", (unsigned char)(tbuf)[j]);
794 printk("\n");
795 }
796 usb_unlock_device(dev);
797 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
798 usb_lock_device(dev);
799 }
800 kfree(tbuf);
801 if (i < 0)
802 return i;
803 return len2;
804 }
805
806 static int proc_resetep(struct dev_state *ps, void __user *arg)
807 {
808 unsigned int ep;
809 int ret;
810
811 if (get_user(ep, (unsigned int __user *)arg))
812 return -EFAULT;
813 ret = findintfep(ps->dev, ep);
814 if (ret < 0)
815 return ret;
816 ret = checkintf(ps, ret);
817 if (ret)
818 return ret;
819 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
820 return 0;
821 }
822
823 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
824 {
825 unsigned int ep;
826 int pipe;
827 int ret;
828
829 if (get_user(ep, (unsigned int __user *)arg))
830 return -EFAULT;
831 ret = findintfep(ps->dev, ep);
832 if (ret < 0)
833 return ret;
834 ret = checkintf(ps, ret);
835 if (ret)
836 return ret;
837 if (ep & USB_DIR_IN)
838 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
839 else
840 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
841
842 return usb_clear_halt(ps->dev, pipe);
843 }
844
845 static int proc_getdriver(struct dev_state *ps, void __user *arg)
846 {
847 struct usbdevfs_getdriver gd;
848 struct usb_interface *intf;
849 int ret;
850
851 if (copy_from_user(&gd, arg, sizeof(gd)))
852 return -EFAULT;
853 intf = usb_ifnum_to_if(ps->dev, gd.interface);
854 if (!intf || !intf->dev.driver)
855 ret = -ENODATA;
856 else {
857 strncpy(gd.driver, intf->dev.driver->name,
858 sizeof(gd.driver));
859 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
860 }
861 return ret;
862 }
863
864 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
865 {
866 struct usbdevfs_connectinfo ci;
867
868 ci.devnum = ps->dev->devnum;
869 ci.slow = ps->dev->speed == USB_SPEED_LOW;
870 if (copy_to_user(arg, &ci, sizeof(ci)))
871 return -EFAULT;
872 return 0;
873 }
874
875 static int proc_resetdevice(struct dev_state *ps)
876 {
877 return usb_reset_composite_device(ps->dev, NULL);
878 }
879
880 static int proc_setintf(struct dev_state *ps, void __user *arg)
881 {
882 struct usbdevfs_setinterface setintf;
883 int ret;
884
885 if (copy_from_user(&setintf, arg, sizeof(setintf)))
886 return -EFAULT;
887 if ((ret = checkintf(ps, setintf.interface)))
888 return ret;
889 return usb_set_interface(ps->dev, setintf.interface,
890 setintf.altsetting);
891 }
892
893 static int proc_setconfig(struct dev_state *ps, void __user *arg)
894 {
895 int u;
896 int status = 0;
897 struct usb_host_config *actconfig;
898
899 if (get_user(u, (int __user *)arg))
900 return -EFAULT;
901
902 actconfig = ps->dev->actconfig;
903
904 /* Don't touch the device if any interfaces are claimed.
905 * It could interfere with other drivers' operations, and if
906 * an interface is claimed by usbfs it could easily deadlock.
907 */
908 if (actconfig) {
909 int i;
910
911 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
912 if (usb_interface_claimed(actconfig->interface[i])) {
913 dev_warn(&ps->dev->dev,
914 "usbfs: interface %d claimed by %s "
915 "while '%s' sets config #%d\n",
916 actconfig->interface[i]
917 ->cur_altsetting
918 ->desc.bInterfaceNumber,
919 actconfig->interface[i]
920 ->dev.driver->name,
921 current->comm, u);
922 status = -EBUSY;
923 break;
924 }
925 }
926 }
927
928 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
929 * so avoid usb_set_configuration()'s kick to sysfs
930 */
931 if (status == 0) {
932 if (actconfig && actconfig->desc.bConfigurationValue == u)
933 status = usb_reset_configuration(ps->dev);
934 else
935 status = usb_set_configuration(ps->dev, u);
936 }
937
938 return status;
939 }
940
941 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
942 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
943 void __user *arg)
944 {
945 struct usbdevfs_iso_packet_desc *isopkt = NULL;
946 struct usb_host_endpoint *ep;
947 struct async *as;
948 struct usb_ctrlrequest *dr = NULL;
949 unsigned int u, totlen, isofrmlen;
950 int ret, ifnum = -1;
951 int is_in;
952
953 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
954 USBDEVFS_URB_SHORT_NOT_OK |
955 USBDEVFS_URB_NO_FSBR |
956 USBDEVFS_URB_ZERO_PACKET |
957 USBDEVFS_URB_NO_INTERRUPT))
958 return -EINVAL;
959 if (!uurb->buffer)
960 return -EINVAL;
961 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN ||
962 uurb->signr > SIGRTMAX))
963 return -EINVAL;
964 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
965 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
966 ifnum = findintfep(ps->dev, uurb->endpoint);
967 if (ifnum < 0)
968 return ifnum;
969 ret = checkintf(ps, ifnum);
970 if (ret)
971 return ret;
972 }
973 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
974 is_in = 1;
975 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
976 } else {
977 is_in = 0;
978 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
979 }
980 if (!ep)
981 return -ENOENT;
982 switch(uurb->type) {
983 case USBDEVFS_URB_TYPE_CONTROL:
984 if (!usb_endpoint_xfer_control(&ep->desc))
985 return -EINVAL;
986 /* min 8 byte setup packet,
987 * max 8 byte setup plus an arbitrary data stage */
988 if (uurb->buffer_length < 8 ||
989 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
990 return -EINVAL;
991 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
992 if (!dr)
993 return -ENOMEM;
994 if (copy_from_user(dr, uurb->buffer, 8)) {
995 kfree(dr);
996 return -EFAULT;
997 }
998 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
999 kfree(dr);
1000 return -EINVAL;
1001 }
1002 ret = check_ctrlrecip(ps, dr->bRequestType,
1003 le16_to_cpup(&dr->wIndex));
1004 if (ret) {
1005 kfree(dr);
1006 return ret;
1007 }
1008 uurb->number_of_packets = 0;
1009 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1010 uurb->buffer += 8;
1011 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1012 is_in = 1;
1013 uurb->endpoint |= USB_DIR_IN;
1014 } else {
1015 is_in = 0;
1016 uurb->endpoint &= ~USB_DIR_IN;
1017 }
1018 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1019 uurb->buffer, uurb->buffer_length)) {
1020 kfree(dr);
1021 return -EFAULT;
1022 }
1023 snoop(&ps->dev->dev, "control urb: bRequest=%02x "
1024 "bRrequestType=%02x wValue=%04x "
1025 "wIndex=%04x wLength=%04x\n",
1026 dr->bRequest, dr->bRequestType,
1027 __le16_to_cpup(&dr->wValue),
1028 __le16_to_cpup(&dr->wIndex),
1029 __le16_to_cpup(&dr->wLength));
1030 break;
1031
1032 case USBDEVFS_URB_TYPE_BULK:
1033 switch (usb_endpoint_type(&ep->desc)) {
1034 case USB_ENDPOINT_XFER_CONTROL:
1035 case USB_ENDPOINT_XFER_ISOC:
1036 return -EINVAL;
1037 /* allow single-shot interrupt transfers, at bogus rates */
1038 }
1039 uurb->number_of_packets = 0;
1040 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1041 return -EINVAL;
1042 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1043 uurb->buffer, uurb->buffer_length))
1044 return -EFAULT;
1045 snoop(&ps->dev->dev, "bulk urb\n");
1046 break;
1047
1048 case USBDEVFS_URB_TYPE_ISO:
1049 /* arbitrary limit */
1050 if (uurb->number_of_packets < 1 ||
1051 uurb->number_of_packets > 128)
1052 return -EINVAL;
1053 if (!usb_endpoint_xfer_isoc(&ep->desc))
1054 return -EINVAL;
1055 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1056 uurb->number_of_packets;
1057 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1058 return -ENOMEM;
1059 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1060 kfree(isopkt);
1061 return -EFAULT;
1062 }
1063 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1064 /* arbitrary limit,
1065 * sufficient for USB 2.0 high-bandwidth iso */
1066 if (isopkt[u].length > 8192) {
1067 kfree(isopkt);
1068 return -EINVAL;
1069 }
1070 totlen += isopkt[u].length;
1071 }
1072 if (totlen > 32768) {
1073 kfree(isopkt);
1074 return -EINVAL;
1075 }
1076 uurb->buffer_length = totlen;
1077 snoop(&ps->dev->dev, "iso urb\n");
1078 break;
1079
1080 case USBDEVFS_URB_TYPE_INTERRUPT:
1081 uurb->number_of_packets = 0;
1082 if (!usb_endpoint_xfer_int(&ep->desc))
1083 return -EINVAL;
1084 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1085 return -EINVAL;
1086 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1087 uurb->buffer, uurb->buffer_length))
1088 return -EFAULT;
1089 snoop(&ps->dev->dev, "interrupt urb\n");
1090 break;
1091
1092 default:
1093 return -EINVAL;
1094 }
1095 as = alloc_async(uurb->number_of_packets);
1096 if (!as) {
1097 kfree(isopkt);
1098 kfree(dr);
1099 return -ENOMEM;
1100 }
1101 as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL);
1102 if (!as->urb->transfer_buffer) {
1103 kfree(isopkt);
1104 kfree(dr);
1105 free_async(as);
1106 return -ENOMEM;
1107 }
1108 as->urb->dev = ps->dev;
1109 as->urb->pipe = (uurb->type << 30) |
1110 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1111 (uurb->endpoint & USB_DIR_IN);
1112
1113 /* This tedious sequence is necessary because the URB_* flags
1114 * are internal to the kernel and subject to change, whereas
1115 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1116 */
1117 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1118 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1119 u |= URB_ISO_ASAP;
1120 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1121 u |= URB_SHORT_NOT_OK;
1122 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1123 u |= URB_NO_FSBR;
1124 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1125 u |= URB_ZERO_PACKET;
1126 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1127 u |= URB_NO_INTERRUPT;
1128 as->urb->transfer_flags = u;
1129
1130 as->urb->transfer_buffer_length = uurb->buffer_length;
1131 as->urb->setup_packet = (unsigned char *)dr;
1132 as->urb->start_frame = uurb->start_frame;
1133 as->urb->number_of_packets = uurb->number_of_packets;
1134 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1135 ps->dev->speed == USB_SPEED_HIGH)
1136 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1137 else
1138 as->urb->interval = ep->desc.bInterval;
1139 as->urb->context = as;
1140 as->urb->complete = async_completed;
1141 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1142 as->urb->iso_frame_desc[u].offset = totlen;
1143 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1144 totlen += isopkt[u].length;
1145 }
1146 kfree(isopkt);
1147 as->ps = ps;
1148 as->userurb = arg;
1149 if (uurb->endpoint & USB_DIR_IN)
1150 as->userbuffer = uurb->buffer;
1151 else
1152 as->userbuffer = NULL;
1153 as->signr = uurb->signr;
1154 as->ifnum = ifnum;
1155 as->pid = get_pid(task_pid(current));
1156 as->uid = current->uid;
1157 as->euid = current->euid;
1158 security_task_getsecid(current, &as->secid);
1159 if (!is_in) {
1160 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1161 as->urb->transfer_buffer_length)) {
1162 free_async(as);
1163 return -EFAULT;
1164 }
1165 }
1166 snoop_urb(as->urb, as->userurb);
1167 async_newpending(as);
1168 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1169 dev_printk(KERN_DEBUG, &ps->dev->dev,
1170 "usbfs: usb_submit_urb returned %d\n", ret);
1171 async_removepending(as);
1172 free_async(as);
1173 return ret;
1174 }
1175 return 0;
1176 }
1177
1178 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1179 {
1180 struct usbdevfs_urb uurb;
1181
1182 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1183 return -EFAULT;
1184
1185 return proc_do_submiturb(ps, &uurb,
1186 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1187 arg);
1188 }
1189
1190 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1191 {
1192 struct async *as;
1193
1194 as = async_getpending(ps, arg);
1195 if (!as)
1196 return -EINVAL;
1197 usb_kill_urb(as->urb);
1198 return 0;
1199 }
1200
1201 static int processcompl(struct async *as, void __user * __user *arg)
1202 {
1203 struct urb *urb = as->urb;
1204 struct usbdevfs_urb __user *userurb = as->userurb;
1205 void __user *addr = as->userurb;
1206 unsigned int i;
1207
1208 if (as->userbuffer)
1209 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1210 urb->transfer_buffer_length))
1211 return -EFAULT;
1212 if (put_user(as->status, &userurb->status))
1213 return -EFAULT;
1214 if (put_user(urb->actual_length, &userurb->actual_length))
1215 return -EFAULT;
1216 if (put_user(urb->error_count, &userurb->error_count))
1217 return -EFAULT;
1218
1219 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1220 for (i = 0; i < urb->number_of_packets; i++) {
1221 if (put_user(urb->iso_frame_desc[i].actual_length,
1222 &userurb->iso_frame_desc[i].actual_length))
1223 return -EFAULT;
1224 if (put_user(urb->iso_frame_desc[i].status,
1225 &userurb->iso_frame_desc[i].status))
1226 return -EFAULT;
1227 }
1228 }
1229
1230 free_async(as);
1231
1232 if (put_user(addr, (void __user * __user *)arg))
1233 return -EFAULT;
1234 return 0;
1235 }
1236
1237 static struct async *reap_as(struct dev_state *ps)
1238 {
1239 DECLARE_WAITQUEUE(wait, current);
1240 struct async *as = NULL;
1241 struct usb_device *dev = ps->dev;
1242
1243 add_wait_queue(&ps->wait, &wait);
1244 for (;;) {
1245 __set_current_state(TASK_INTERRUPTIBLE);
1246 as = async_getcompleted(ps);
1247 if (as)
1248 break;
1249 if (signal_pending(current))
1250 break;
1251 usb_unlock_device(dev);
1252 schedule();
1253 usb_lock_device(dev);
1254 }
1255 remove_wait_queue(&ps->wait, &wait);
1256 set_current_state(TASK_RUNNING);
1257 return as;
1258 }
1259
1260 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1261 {
1262 struct async *as = reap_as(ps);
1263 if (as)
1264 return processcompl(as, (void __user * __user *)arg);
1265 if (signal_pending(current))
1266 return -EINTR;
1267 return -EIO;
1268 }
1269
1270 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1271 {
1272 struct async *as;
1273
1274 if (!(as = async_getcompleted(ps)))
1275 return -EAGAIN;
1276 return processcompl(as, (void __user * __user *)arg);
1277 }
1278
1279 #ifdef CONFIG_COMPAT
1280
1281 static int get_urb32(struct usbdevfs_urb *kurb,
1282 struct usbdevfs_urb32 __user *uurb)
1283 {
1284 __u32 uptr;
1285 if (get_user(kurb->type, &uurb->type) ||
1286 __get_user(kurb->endpoint, &uurb->endpoint) ||
1287 __get_user(kurb->status, &uurb->status) ||
1288 __get_user(kurb->flags, &uurb->flags) ||
1289 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1290 __get_user(kurb->actual_length, &uurb->actual_length) ||
1291 __get_user(kurb->start_frame, &uurb->start_frame) ||
1292 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1293 __get_user(kurb->error_count, &uurb->error_count) ||
1294 __get_user(kurb->signr, &uurb->signr))
1295 return -EFAULT;
1296
1297 if (__get_user(uptr, &uurb->buffer))
1298 return -EFAULT;
1299 kurb->buffer = compat_ptr(uptr);
1300 if (__get_user(uptr, &uurb->buffer))
1301 return -EFAULT;
1302 kurb->usercontext = compat_ptr(uptr);
1303
1304 return 0;
1305 }
1306
1307 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1308 {
1309 struct usbdevfs_urb uurb;
1310
1311 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1312 return -EFAULT;
1313
1314 return proc_do_submiturb(ps, &uurb,
1315 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1316 arg);
1317 }
1318
1319 static int processcompl_compat(struct async *as, void __user * __user *arg)
1320 {
1321 struct urb *urb = as->urb;
1322 struct usbdevfs_urb32 __user *userurb = as->userurb;
1323 void __user *addr = as->userurb;
1324 unsigned int i;
1325
1326 if (as->userbuffer)
1327 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1328 urb->transfer_buffer_length))
1329 return -EFAULT;
1330 if (put_user(as->status, &userurb->status))
1331 return -EFAULT;
1332 if (put_user(urb->actual_length, &userurb->actual_length))
1333 return -EFAULT;
1334 if (put_user(urb->error_count, &userurb->error_count))
1335 return -EFAULT;
1336
1337 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1338 for (i = 0; i < urb->number_of_packets; i++) {
1339 if (put_user(urb->iso_frame_desc[i].actual_length,
1340 &userurb->iso_frame_desc[i].actual_length))
1341 return -EFAULT;
1342 if (put_user(urb->iso_frame_desc[i].status,
1343 &userurb->iso_frame_desc[i].status))
1344 return -EFAULT;
1345 }
1346 }
1347
1348 free_async(as);
1349 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1350 return -EFAULT;
1351 return 0;
1352 }
1353
1354 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1355 {
1356 struct async *as = reap_as(ps);
1357 if (as)
1358 return processcompl_compat(as, (void __user * __user *)arg);
1359 if (signal_pending(current))
1360 return -EINTR;
1361 return -EIO;
1362 }
1363
1364 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1365 {
1366 struct async *as;
1367
1368 if (!(as = async_getcompleted(ps)))
1369 return -EAGAIN;
1370 return processcompl_compat(as, (void __user * __user *)arg);
1371 }
1372
1373 #endif
1374
1375 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1376 {
1377 struct usbdevfs_disconnectsignal ds;
1378
1379 if (copy_from_user(&ds, arg, sizeof(ds)))
1380 return -EFAULT;
1381 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1382 return -EINVAL;
1383 ps->discsignr = ds.signr;
1384 ps->disccontext = ds.context;
1385 return 0;
1386 }
1387
1388 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1389 {
1390 unsigned int ifnum;
1391
1392 if (get_user(ifnum, (unsigned int __user *)arg))
1393 return -EFAULT;
1394 return claimintf(ps, ifnum);
1395 }
1396
1397 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1398 {
1399 unsigned int ifnum;
1400 int ret;
1401
1402 if (get_user(ifnum, (unsigned int __user *)arg))
1403 return -EFAULT;
1404 if ((ret = releaseintf(ps, ifnum)) < 0)
1405 return ret;
1406 destroy_async_on_interface (ps, ifnum);
1407 return 0;
1408 }
1409
1410 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1411 {
1412 int size;
1413 void *buf = NULL;
1414 int retval = 0;
1415 struct usb_interface *intf = NULL;
1416 struct usb_driver *driver = NULL;
1417
1418 /* alloc buffer */
1419 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1420 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1421 return -ENOMEM;
1422 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1423 if (copy_from_user(buf, ctl->data, size)) {
1424 kfree(buf);
1425 return -EFAULT;
1426 }
1427 } else {
1428 memset(buf, 0, size);
1429 }
1430 }
1431
1432 if (!connected(ps)) {
1433 kfree(buf);
1434 return -ENODEV;
1435 }
1436
1437 if (ps->dev->state != USB_STATE_CONFIGURED)
1438 retval = -EHOSTUNREACH;
1439 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1440 retval = -EINVAL;
1441 else switch (ctl->ioctl_code) {
1442
1443 /* disconnect kernel driver from interface */
1444 case USBDEVFS_DISCONNECT:
1445 if (intf->dev.driver) {
1446 driver = to_usb_driver(intf->dev.driver);
1447 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1448 usb_driver_release_interface(driver, intf);
1449 } else
1450 retval = -ENODATA;
1451 break;
1452
1453 /* let kernel drivers try to (re)bind to the interface */
1454 case USBDEVFS_CONNECT:
1455 if (!intf->dev.driver)
1456 retval = device_attach(&intf->dev);
1457 else
1458 retval = -EBUSY;
1459 break;
1460
1461 /* talk directly to the interface's driver */
1462 default:
1463 if (intf->dev.driver)
1464 driver = to_usb_driver(intf->dev.driver);
1465 if (driver == NULL || driver->ioctl == NULL) {
1466 retval = -ENOTTY;
1467 } else {
1468 retval = driver->ioctl(intf, ctl->ioctl_code, buf);
1469 if (retval == -ENOIOCTLCMD)
1470 retval = -ENOTTY;
1471 }
1472 }
1473
1474 /* cleanup and return */
1475 if (retval >= 0
1476 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1477 && size > 0
1478 && copy_to_user(ctl->data, buf, size) != 0)
1479 retval = -EFAULT;
1480
1481 kfree(buf);
1482 return retval;
1483 }
1484
1485 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1486 {
1487 struct usbdevfs_ioctl ctrl;
1488
1489 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1490 return -EFAULT;
1491 return proc_ioctl(ps, &ctrl);
1492 }
1493
1494 #ifdef CONFIG_COMPAT
1495 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1496 {
1497 struct usbdevfs_ioctl32 __user *uioc;
1498 struct usbdevfs_ioctl ctrl;
1499 u32 udata;
1500
1501 uioc = compat_ptr((long)arg);
1502 if (get_user(ctrl.ifno, &uioc->ifno) ||
1503 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1504 __get_user(udata, &uioc->data))
1505 return -EFAULT;
1506 ctrl.data = compat_ptr(udata);
1507
1508 return proc_ioctl(ps, &ctrl);
1509 }
1510 #endif
1511
1512 /*
1513 * NOTE: All requests here that have interface numbers as parameters
1514 * are assuming that somehow the configuration has been prevented from
1515 * changing. But there's no mechanism to ensure that...
1516 */
1517 static int usbdev_ioctl(struct inode *inode, struct file *file,
1518 unsigned int cmd, unsigned long arg)
1519 {
1520 struct dev_state *ps = file->private_data;
1521 struct usb_device *dev = ps->dev;
1522 void __user *p = (void __user *)arg;
1523 int ret = -ENOTTY;
1524
1525 if (!(file->f_mode & FMODE_WRITE))
1526 return -EPERM;
1527 usb_lock_device(dev);
1528 if (!connected(ps)) {
1529 usb_unlock_device(dev);
1530 return -ENODEV;
1531 }
1532
1533 switch (cmd) {
1534 case USBDEVFS_CONTROL:
1535 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1536 ret = proc_control(ps, p);
1537 if (ret >= 0)
1538 inode->i_mtime = CURRENT_TIME;
1539 break;
1540
1541 case USBDEVFS_BULK:
1542 snoop(&dev->dev, "%s: BULK\n", __func__);
1543 ret = proc_bulk(ps, p);
1544 if (ret >= 0)
1545 inode->i_mtime = CURRENT_TIME;
1546 break;
1547
1548 case USBDEVFS_RESETEP:
1549 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1550 ret = proc_resetep(ps, p);
1551 if (ret >= 0)
1552 inode->i_mtime = CURRENT_TIME;
1553 break;
1554
1555 case USBDEVFS_RESET:
1556 snoop(&dev->dev, "%s: RESET\n", __func__);
1557 ret = proc_resetdevice(ps);
1558 break;
1559
1560 case USBDEVFS_CLEAR_HALT:
1561 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1562 ret = proc_clearhalt(ps, p);
1563 if (ret >= 0)
1564 inode->i_mtime = CURRENT_TIME;
1565 break;
1566
1567 case USBDEVFS_GETDRIVER:
1568 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1569 ret = proc_getdriver(ps, p);
1570 break;
1571
1572 case USBDEVFS_CONNECTINFO:
1573 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1574 ret = proc_connectinfo(ps, p);
1575 break;
1576
1577 case USBDEVFS_SETINTERFACE:
1578 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1579 ret = proc_setintf(ps, p);
1580 break;
1581
1582 case USBDEVFS_SETCONFIGURATION:
1583 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1584 ret = proc_setconfig(ps, p);
1585 break;
1586
1587 case USBDEVFS_SUBMITURB:
1588 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1589 ret = proc_submiturb(ps, p);
1590 if (ret >= 0)
1591 inode->i_mtime = CURRENT_TIME;
1592 break;
1593
1594 #ifdef CONFIG_COMPAT
1595
1596 case USBDEVFS_SUBMITURB32:
1597 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1598 ret = proc_submiturb_compat(ps, p);
1599 if (ret >= 0)
1600 inode->i_mtime = CURRENT_TIME;
1601 break;
1602
1603 case USBDEVFS_REAPURB32:
1604 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1605 ret = proc_reapurb_compat(ps, p);
1606 break;
1607
1608 case USBDEVFS_REAPURBNDELAY32:
1609 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __func__);
1610 ret = proc_reapurbnonblock_compat(ps, p);
1611 break;
1612
1613 case USBDEVFS_IOCTL32:
1614 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1615 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1616 break;
1617 #endif
1618
1619 case USBDEVFS_DISCARDURB:
1620 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1621 ret = proc_unlinkurb(ps, p);
1622 break;
1623
1624 case USBDEVFS_REAPURB:
1625 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1626 ret = proc_reapurb(ps, p);
1627 break;
1628
1629 case USBDEVFS_REAPURBNDELAY:
1630 snoop(&dev->dev, "%s: REAPURBDELAY\n", __func__);
1631 ret = proc_reapurbnonblock(ps, p);
1632 break;
1633
1634 case USBDEVFS_DISCSIGNAL:
1635 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1636 ret = proc_disconnectsignal(ps, p);
1637 break;
1638
1639 case USBDEVFS_CLAIMINTERFACE:
1640 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1641 ret = proc_claiminterface(ps, p);
1642 break;
1643
1644 case USBDEVFS_RELEASEINTERFACE:
1645 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1646 ret = proc_releaseinterface(ps, p);
1647 break;
1648
1649 case USBDEVFS_IOCTL:
1650 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1651 ret = proc_ioctl_default(ps, p);
1652 break;
1653 }
1654 usb_unlock_device(dev);
1655 if (ret >= 0)
1656 inode->i_atime = CURRENT_TIME;
1657 return ret;
1658 }
1659
1660 /* No kernel lock - fine */
1661 static unsigned int usbdev_poll(struct file *file,
1662 struct poll_table_struct *wait)
1663 {
1664 struct dev_state *ps = file->private_data;
1665 unsigned int mask = 0;
1666
1667 poll_wait(file, &ps->wait, wait);
1668 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1669 mask |= POLLOUT | POLLWRNORM;
1670 if (!connected(ps))
1671 mask |= POLLERR | POLLHUP;
1672 return mask;
1673 }
1674
1675 const struct file_operations usbdev_file_operations = {
1676 .owner = THIS_MODULE,
1677 .llseek = usbdev_lseek,
1678 .read = usbdev_read,
1679 .poll = usbdev_poll,
1680 .ioctl = usbdev_ioctl,
1681 .open = usbdev_open,
1682 .release = usbdev_release,
1683 };
1684
1685 #ifdef CONFIG_USB_DEVICE_CLASS
1686 static struct class *usb_classdev_class;
1687
1688 static int usb_classdev_add(struct usb_device *dev)
1689 {
1690 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1691
1692 dev->usb_classdev = device_create(usb_classdev_class, &dev->dev,
1693 MKDEV(USB_DEVICE_MAJOR, minor),
1694 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1695 if (IS_ERR(dev->usb_classdev))
1696 return PTR_ERR(dev->usb_classdev);
1697
1698 return 0;
1699 }
1700
1701 static void usb_classdev_remove(struct usb_device *dev)
1702 {
1703 device_unregister(dev->usb_classdev);
1704 }
1705
1706 static int usb_classdev_notify(struct notifier_block *self,
1707 unsigned long action, void *dev)
1708 {
1709 switch (action) {
1710 case USB_DEVICE_ADD:
1711 if (usb_classdev_add(dev))
1712 return NOTIFY_BAD;
1713 break;
1714 case USB_DEVICE_REMOVE:
1715 usb_classdev_remove(dev);
1716 break;
1717 }
1718 return NOTIFY_OK;
1719 }
1720
1721 static struct notifier_block usbdev_nb = {
1722 .notifier_call = usb_classdev_notify,
1723 };
1724 #endif
1725
1726 static struct cdev usb_device_cdev;
1727
1728 int __init usb_devio_init(void)
1729 {
1730 int retval;
1731
1732 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1733 "usb_device");
1734 if (retval) {
1735 err("unable to register minors for usb_device");
1736 goto out;
1737 }
1738 cdev_init(&usb_device_cdev, &usbdev_file_operations);
1739 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1740 if (retval) {
1741 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1742 goto error_cdev;
1743 }
1744 #ifdef CONFIG_USB_DEVICE_CLASS
1745 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
1746 if (IS_ERR(usb_classdev_class)) {
1747 err("unable to register usb_device class");
1748 retval = PTR_ERR(usb_classdev_class);
1749 cdev_del(&usb_device_cdev);
1750 usb_classdev_class = NULL;
1751 goto out;
1752 }
1753
1754 usb_register_notify(&usbdev_nb);
1755 #endif
1756 out:
1757 return retval;
1758
1759 error_cdev:
1760 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1761 goto out;
1762 }
1763
1764 void usb_devio_cleanup(void)
1765 {
1766 #ifdef CONFIG_USB_DEVICE_CLASS
1767 usb_unregister_notify(&usbdev_nb);
1768 class_destroy(usb_classdev_class);
1769 #endif
1770 cdev_del(&usb_device_cdev);
1771 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1772 }
kernel source for telekom puls (alcatel/mediatek)