1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
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.
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.
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.
22 * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
24 * This file implements the usbfs/x/y files, where
25 * x is the bus number and y the device number.
27 * It allows user space programs/"drivers" to communicate directly
28 * with USB devices without intervening kernel driver.
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
37 /*****************************************************************************/
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>
55 #include "hcd.h" /* for usbcore internals */
59 #define USB_DEVICE_MAX USB_MAXBUS * 128
61 /* Mutual exclusion for removal, open, and release */
62 DEFINE_MUTEX(usbfs_mutex
);
65 struct list_head asynclist
;
71 void __user
*userbuffer
;
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");
82 #define snoop(dev, format, arg...) \
85 dev_info(dev , format , ## arg); \
88 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
91 #define MAX_USBFS_BUFFER_SIZE 16384
93 static inline int connected(struct dev_state
*ps
)
95 return (!list_empty(&ps
->list
) &&
96 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
99 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
107 file
->f_pos
= offset
;
111 file
->f_pos
+= offset
;
123 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
126 struct dev_state
*ps
= file
->private_data
;
127 struct usb_device
*dev
= ps
->dev
;
134 usb_lock_device(dev
);
135 if (!connected(ps
)) {
138 } else if (pos
< 0) {
143 if (pos
< sizeof(struct usb_device_descriptor
)) {
144 /* 18 bytes - fits on the stack */
145 struct usb_device_descriptor temp_desc
;
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
);
153 len
= sizeof(struct usb_device_descriptor
) - pos
;
156 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
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
);
173 if (*ppos
< pos
+ length
) {
175 /* The descriptor may claim to be longer than it
176 * really is. Here is the actual allocated length. */
178 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
180 len
= length
- (*ppos
- pos
);
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
))) {
205 usb_unlock_device(dev
);
210 * async list handling
213 static struct async
*alloc_async(unsigned int numisoframes
)
217 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
220 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
228 static void free_async(struct async
*as
)
231 kfree(as
->urb
->transfer_buffer
);
232 kfree(as
->urb
->setup_packet
);
233 usb_free_urb(as
->urb
);
237 static inline void async_newpending(struct async
*as
)
239 struct dev_state
*ps
= as
->ps
;
242 spin_lock_irqsave(&ps
->lock
, flags
);
243 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
244 spin_unlock_irqrestore(&ps
->lock
, flags
);
247 static inline void async_removepending(struct async
*as
)
249 struct dev_state
*ps
= as
->ps
;
252 spin_lock_irqsave(&ps
->lock
, flags
);
253 list_del_init(&as
->asynclist
);
254 spin_unlock_irqrestore(&ps
->lock
, flags
);
257 static inline struct async
*async_getcompleted(struct dev_state
*ps
)
260 struct async
*as
= NULL
;
262 spin_lock_irqsave(&ps
->lock
, flags
);
263 if (!list_empty(&ps
->async_completed
)) {
264 as
= list_entry(ps
->async_completed
.next
, struct async
,
266 list_del_init(&as
->asynclist
);
268 spin_unlock_irqrestore(&ps
->lock
, flags
);
272 static inline struct async
*async_getpending(struct dev_state
*ps
,
273 void __user
*userurb
)
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
);
285 spin_unlock_irqrestore(&ps
->lock
, flags
);
289 static void snoop_urb(struct urb
*urb
, void __user
*userurb
)
292 unsigned char *data
= urb
->transfer_buffer
;
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
]);
309 static void async_completed(struct urb
*urb
)
311 struct async
*as
= urb
->context
;
312 struct dev_state
*ps
= as
->ps
;
313 struct siginfo sinfo
;
315 spin_lock(&ps
->lock
);
316 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
317 spin_unlock(&ps
->lock
);
318 as
->status
= urb
->status
;
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
);
327 snoop(&urb
->dev
->dev
, "urb complete\n");
328 snoop_urb(urb
, as
->userurb
);
332 static void destroy_async(struct dev_state
*ps
, struct list_head
*list
)
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
);
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
);
347 spin_unlock_irqrestore(&ps
->lock
, flags
);
348 as
= async_getcompleted(ps
);
351 as
= async_getcompleted(ps
);
355 static void destroy_async_on_interface(struct dev_state
*ps
,
358 struct list_head
*p
, *q
, hitlist
;
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
);
370 static inline void destroy_all_async(struct dev_state
*ps
)
372 destroy_async(ps
, &ps
->async_pending
);
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.
381 static int driver_probe(struct usb_interface
*intf
,
382 const struct usb_device_id
*id
)
387 static void driver_disconnect(struct usb_interface
*intf
)
389 struct dev_state
*ps
= usb_get_intfdata(intf
);
390 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
395 /* NOTE: this relies on usbcore having canceled and completed
396 * all pending I/O requests; 2.6 does that.
399 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
400 clear_bit(ifnum
, &ps
->ifclaimed
);
402 warn("interface number %u out of range", ifnum
);
404 usb_set_intfdata(intf
, NULL
);
406 /* force async requests to complete */
407 destroy_async_on_interface(ps
, ifnum
);
410 /* The following routines are merely placeholders. There is no way
411 * to inform a user task about suspend or resumes.
413 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
418 static int driver_resume(struct usb_interface
*intf
)
423 struct usb_driver usbfs_driver
= {
425 .probe
= driver_probe
,
426 .disconnect
= driver_disconnect
,
427 .suspend
= driver_suspend
,
428 .resume
= driver_resume
,
431 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
433 struct usb_device
*dev
= ps
->dev
;
434 struct usb_interface
*intf
;
437 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
439 /* already claimed */
440 if (test_bit(ifnum
, &ps
->ifclaimed
))
443 intf
= usb_ifnum_to_if(dev
, ifnum
);
447 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
449 set_bit(ifnum
, &ps
->ifclaimed
);
453 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
455 struct usb_device
*dev
;
456 struct usb_interface
*intf
;
460 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
463 intf
= usb_ifnum_to_if(dev
, ifnum
);
466 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
467 usb_driver_release_interface(&usbfs_driver
, intf
);
473 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
475 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
476 return -EHOSTUNREACH
;
477 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
479 if (test_bit(ifnum
, &ps
->ifclaimed
))
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
);
488 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
490 unsigned int i
, j
, e
;
491 struct usb_interface
*intf
;
492 struct usb_host_interface
*alts
;
493 struct usb_endpoint_descriptor
*endpt
;
495 if (ep
& ~(USB_DIR_IN
|0xf))
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
;
513 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
,
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
))
525 switch (requesttype
& USB_RECIP_MASK
) {
526 case USB_RECIP_ENDPOINT
:
527 ret
= findintfep(ps
->dev
, index
);
529 ret
= checkintf(ps
, ret
);
532 case USB_RECIP_INTERFACE
:
533 ret
= checkintf(ps
, index
);
539 static int __match_minor(struct device
*dev
, void *data
)
541 int minor
= *((int *)data
);
543 if (dev
->devt
== MKDEV(USB_DEVICE_MAJOR
, minor
))
548 static struct usb_device
*usbdev_lookup_by_minor(int minor
)
552 dev
= bus_find_device(&usb_bus_type
, NULL
, &minor
, __match_minor
);
556 return container_of(dev
, struct usb_device
, dev
);
562 static int usbdev_open(struct inode
*inode
, struct file
*file
)
564 struct usb_device
*dev
= NULL
;
565 struct dev_state
*ps
;
569 /* Protect against simultaneous removal or release */
570 mutex_lock(&usbfs_mutex
);
573 ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
);
578 /* usbdev device-node */
579 if (imajor(inode
) == USB_DEVICE_MAJOR
)
580 dev
= usbdev_lookup_by_minor(iminor(inode
));
581 #ifdef CONFIG_USB_DEVICEFS
584 dev
= inode
->i_private
;
588 ret
= usb_autoresume_device(dev
);
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
);
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
;
607 security_task_getsecid(current
, &ps
->secid
);
609 list_add_tail(&ps
->list
, &dev
->filelist
);
610 file
->private_data
= ps
;
614 mutex_unlock(&usbfs_mutex
);
619 static int usbdev_release(struct inode
*inode
, struct file
*file
)
621 struct dev_state
*ps
= file
->private_data
;
622 struct usb_device
*dev
= ps
->dev
;
625 usb_lock_device(dev
);
627 /* Protect against simultaneous open */
628 mutex_lock(&usbfs_mutex
);
629 list_del_init(&ps
->list
);
630 mutex_unlock(&usbfs_mutex
);
632 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
634 if (test_bit(ifnum
, &ps
->ifclaimed
))
635 releaseintf(ps
, ifnum
);
637 destroy_all_async(ps
);
638 usb_autosuspend_device(dev
);
639 usb_unlock_device(dev
);
641 put_pid(ps
->disc_pid
);
646 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
648 struct usb_device
*dev
= ps
->dev
;
649 struct usbdevfs_ctrltransfer ctrl
;
655 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
657 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
);
660 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
661 if (wLength
> PAGE_SIZE
)
663 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
667 if (ctrl
.bRequestType
& 0x80) {
668 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
670 free_page((unsigned long)tbuf
);
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
);
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
) {
686 dev_info(&dev
->dev
, "control read: data ");
687 for (j
= 0; j
< i
; ++j
)
688 printk("%02x ", (u8
)(tbuf
)[j
]);
691 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
692 free_page((unsigned long)tbuf
);
698 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
699 free_page((unsigned long)tbuf
);
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
);
709 dev_info(&dev
->dev
, "control write: data: ");
710 for (j
= 0; j
< ctrl
.wLength
; ++j
)
711 printk("%02x ", (unsigned char)(tbuf
)[j
]);
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
);
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
,
730 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
732 struct usb_device
*dev
= ps
->dev
;
733 struct usbdevfs_bulktransfer bulk
;
734 unsigned int tmo
, len1
, pipe
;
739 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
741 ret
= findintfep(ps
->dev
, bulk
.ep
);
744 ret
= checkintf(ps
, ret
);
747 if (bulk
.ep
& USB_DIR_IN
)
748 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
750 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
751 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
754 if (len1
> MAX_USBFS_BUFFER_SIZE
)
756 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
759 if (bulk
.ep
& 0x80) {
760 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
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
);
771 dev_info(&dev
->dev
, "bulk read: data ");
772 for (j
= 0; j
< len2
; ++j
)
773 printk("%02x ", (u8
)(tbuf
)[j
]);
776 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
783 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
788 snoop(&dev
->dev
, "bulk write: len=0x%02x timeout=%04d\n",
789 bulk
.len
, bulk
.timeout
);
791 dev_info(&dev
->dev
, "bulk write: data: ");
792 for (j
= 0; j
< len1
; ++j
)
793 printk("%02x ", (unsigned char)(tbuf
)[j
]);
796 usb_unlock_device(dev
);
797 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
798 usb_lock_device(dev
);
806 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
811 if (get_user(ep
, (unsigned int __user
*)arg
))
813 ret
= findintfep(ps
->dev
, ep
);
816 ret
= checkintf(ps
, ret
);
819 usb_settoggle(ps
->dev
, ep
& 0xf, !(ep
& USB_DIR_IN
), 0);
823 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
829 if (get_user(ep
, (unsigned int __user
*)arg
))
831 ret
= findintfep(ps
->dev
, ep
);
834 ret
= checkintf(ps
, ret
);
838 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
840 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
842 return usb_clear_halt(ps
->dev
, pipe
);
845 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
847 struct usbdevfs_getdriver gd
;
848 struct usb_interface
*intf
;
851 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
853 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
854 if (!intf
|| !intf
->dev
.driver
)
857 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
859 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
864 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
866 struct usbdevfs_connectinfo ci
;
868 ci
.devnum
= ps
->dev
->devnum
;
869 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
870 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
875 static int proc_resetdevice(struct dev_state
*ps
)
877 return usb_reset_composite_device(ps
->dev
, NULL
);
880 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
882 struct usbdevfs_setinterface setintf
;
885 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
887 if ((ret
= checkintf(ps
, setintf
.interface
)))
889 return usb_set_interface(ps
->dev
, setintf
.interface
,
893 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
897 struct usb_host_config
*actconfig
;
899 if (get_user(u
, (int __user
*)arg
))
902 actconfig
= ps
->dev
->actconfig
;
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.
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
]
918 ->desc
.bInterfaceNumber
,
919 actconfig
->interface
[i
]
928 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
929 * so avoid usb_set_configuration()'s kick to sysfs
932 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
933 status
= usb_reset_configuration(ps
->dev
);
935 status
= usb_set_configuration(ps
->dev
, u
);
941 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
942 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
945 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
946 struct usb_host_endpoint
*ep
;
948 struct usb_ctrlrequest
*dr
= NULL
;
949 unsigned int u
, totlen
, isofrmlen
;
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
))
961 if (uurb
->signr
!= 0 && (uurb
->signr
< SIGRTMIN
||
962 uurb
->signr
> SIGRTMAX
))
964 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
965 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
966 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
969 ret
= checkintf(ps
, ifnum
);
973 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0) {
975 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
978 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
983 case USBDEVFS_URB_TYPE_CONTROL
:
984 if (!usb_endpoint_xfer_control(&ep
->desc
))
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
))
991 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
994 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
998 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1002 ret
= check_ctrlrecip(ps
, dr
->bRequestType
,
1003 le16_to_cpup(&dr
->wIndex
));
1008 uurb
->number_of_packets
= 0;
1009 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1011 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1013 uurb
->endpoint
|= USB_DIR_IN
;
1016 uurb
->endpoint
&= ~USB_DIR_IN
;
1018 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1019 uurb
->buffer
, uurb
->buffer_length
)) {
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
));
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
:
1037 /* allow single-shot interrupt transfers, at bogus rates */
1039 uurb
->number_of_packets
= 0;
1040 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1042 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1043 uurb
->buffer
, uurb
->buffer_length
))
1045 snoop(&ps
->dev
->dev
, "bulk urb\n");
1048 case USBDEVFS_URB_TYPE_ISO
:
1049 /* arbitrary limit */
1050 if (uurb
->number_of_packets
< 1 ||
1051 uurb
->number_of_packets
> 128)
1053 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1055 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1056 uurb
->number_of_packets
;
1057 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
1059 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
1063 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1065 * sufficient for USB 2.0 high-bandwidth iso */
1066 if (isopkt
[u
].length
> 8192) {
1070 totlen
+= isopkt
[u
].length
;
1072 if (totlen
> 32768) {
1076 uurb
->buffer_length
= totlen
;
1077 snoop(&ps
->dev
->dev
, "iso urb\n");
1080 case USBDEVFS_URB_TYPE_INTERRUPT
:
1081 uurb
->number_of_packets
= 0;
1082 if (!usb_endpoint_xfer_int(&ep
->desc
))
1084 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1086 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1087 uurb
->buffer
, uurb
->buffer_length
))
1089 snoop(&ps
->dev
->dev
, "interrupt urb\n");
1095 as
= alloc_async(uurb
->number_of_packets
);
1101 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
, GFP_KERNEL
);
1102 if (!as
->urb
->transfer_buffer
) {
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
);
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.
1117 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1118 if (uurb
->flags
& USBDEVFS_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
)
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
;
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);
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
;
1149 if (uurb
->endpoint
& USB_DIR_IN
)
1150 as
->userbuffer
= uurb
->buffer
;
1152 as
->userbuffer
= NULL
;
1153 as
->signr
= uurb
->signr
;
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
);
1160 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
,
1161 as
->urb
->transfer_buffer_length
)) {
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
);
1178 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1180 struct usbdevfs_urb uurb
;
1182 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1185 return proc_do_submiturb(ps
, &uurb
,
1186 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1190 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1194 as
= async_getpending(ps
, arg
);
1197 usb_kill_urb(as
->urb
);
1201 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1203 struct urb
*urb
= as
->urb
;
1204 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1205 void __user
*addr
= as
->userurb
;
1209 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
,
1210 urb
->transfer_buffer_length
))
1212 if (put_user(as
->status
, &userurb
->status
))
1214 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1216 if (put_user(urb
->error_count
, &userurb
->error_count
))
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
))
1224 if (put_user(urb
->iso_frame_desc
[i
].status
,
1225 &userurb
->iso_frame_desc
[i
].status
))
1232 if (put_user(addr
, (void __user
* __user
*)arg
))
1237 static struct async
*reap_as(struct dev_state
*ps
)
1239 DECLARE_WAITQUEUE(wait
, current
);
1240 struct async
*as
= NULL
;
1241 struct usb_device
*dev
= ps
->dev
;
1243 add_wait_queue(&ps
->wait
, &wait
);
1245 __set_current_state(TASK_INTERRUPTIBLE
);
1246 as
= async_getcompleted(ps
);
1249 if (signal_pending(current
))
1251 usb_unlock_device(dev
);
1253 usb_lock_device(dev
);
1255 remove_wait_queue(&ps
->wait
, &wait
);
1256 set_current_state(TASK_RUNNING
);
1260 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1262 struct async
*as
= reap_as(ps
);
1264 return processcompl(as
, (void __user
* __user
*)arg
);
1265 if (signal_pending(current
))
1270 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1274 if (!(as
= async_getcompleted(ps
)))
1276 return processcompl(as
, (void __user
* __user
*)arg
);
1279 #ifdef CONFIG_COMPAT
1281 static int get_urb32(struct usbdevfs_urb
*kurb
,
1282 struct usbdevfs_urb32 __user
*uurb
)
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
))
1297 if (__get_user(uptr
, &uurb
->buffer
))
1299 kurb
->buffer
= compat_ptr(uptr
);
1300 if (__get_user(uptr
, &uurb
->buffer
))
1302 kurb
->usercontext
= compat_ptr(uptr
);
1307 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1309 struct usbdevfs_urb uurb
;
1311 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1314 return proc_do_submiturb(ps
, &uurb
,
1315 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
1319 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1321 struct urb
*urb
= as
->urb
;
1322 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1323 void __user
*addr
= as
->userurb
;
1327 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
,
1328 urb
->transfer_buffer_length
))
1330 if (put_user(as
->status
, &userurb
->status
))
1332 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1334 if (put_user(urb
->error_count
, &userurb
->error_count
))
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
))
1342 if (put_user(urb
->iso_frame_desc
[i
].status
,
1343 &userurb
->iso_frame_desc
[i
].status
))
1349 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
1354 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1356 struct async
*as
= reap_as(ps
);
1358 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1359 if (signal_pending(current
))
1364 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1368 if (!(as
= async_getcompleted(ps
)))
1370 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1375 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1377 struct usbdevfs_disconnectsignal ds
;
1379 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1381 if (ds
.signr
!= 0 && (ds
.signr
< SIGRTMIN
|| ds
.signr
> SIGRTMAX
))
1383 ps
->discsignr
= ds
.signr
;
1384 ps
->disccontext
= ds
.context
;
1388 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1392 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1394 return claimintf(ps
, ifnum
);
1397 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1402 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1404 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1406 destroy_async_on_interface (ps
, ifnum
);
1410 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1415 struct usb_interface
*intf
= NULL
;
1416 struct usb_driver
*driver
= NULL
;
1419 if ((size
= _IOC_SIZE(ctl
->ioctl_code
)) > 0) {
1420 if ((buf
= kmalloc(size
, GFP_KERNEL
)) == NULL
)
1422 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1423 if (copy_from_user(buf
, ctl
->data
, size
)) {
1428 memset(buf
, 0, size
);
1432 if (!connected(ps
)) {
1437 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1438 retval
= -EHOSTUNREACH
;
1439 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
1441 else switch (ctl
->ioctl_code
) {
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
);
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
);
1461 /* talk directly to the interface's driver */
1463 if (intf
->dev
.driver
)
1464 driver
= to_usb_driver(intf
->dev
.driver
);
1465 if (driver
== NULL
|| driver
->ioctl
== NULL
) {
1468 retval
= driver
->ioctl(intf
, ctl
->ioctl_code
, buf
);
1469 if (retval
== -ENOIOCTLCMD
)
1474 /* cleanup and return */
1476 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
1478 && copy_to_user(ctl
->data
, buf
, size
) != 0)
1485 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1487 struct usbdevfs_ioctl ctrl
;
1489 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1491 return proc_ioctl(ps
, &ctrl
);
1494 #ifdef CONFIG_COMPAT
1495 static int proc_ioctl_compat(struct dev_state
*ps
, compat_uptr_t arg
)
1497 struct usbdevfs_ioctl32 __user
*uioc
;
1498 struct usbdevfs_ioctl ctrl
;
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
))
1506 ctrl
.data
= compat_ptr(udata
);
1508 return proc_ioctl(ps
, &ctrl
);
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...
1517 static int usbdev_ioctl(struct inode
*inode
, struct file
*file
,
1518 unsigned int cmd
, unsigned long arg
)
1520 struct dev_state
*ps
= file
->private_data
;
1521 struct usb_device
*dev
= ps
->dev
;
1522 void __user
*p
= (void __user
*)arg
;
1525 if (!(file
->f_mode
& FMODE_WRITE
))
1527 usb_lock_device(dev
);
1528 if (!connected(ps
)) {
1529 usb_unlock_device(dev
);
1534 case USBDEVFS_CONTROL
:
1535 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
1536 ret
= proc_control(ps
, p
);
1538 inode
->i_mtime
= CURRENT_TIME
;
1542 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
1543 ret
= proc_bulk(ps
, p
);
1545 inode
->i_mtime
= CURRENT_TIME
;
1548 case USBDEVFS_RESETEP
:
1549 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
1550 ret
= proc_resetep(ps
, p
);
1552 inode
->i_mtime
= CURRENT_TIME
;
1555 case USBDEVFS_RESET
:
1556 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
1557 ret
= proc_resetdevice(ps
);
1560 case USBDEVFS_CLEAR_HALT
:
1561 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
1562 ret
= proc_clearhalt(ps
, p
);
1564 inode
->i_mtime
= CURRENT_TIME
;
1567 case USBDEVFS_GETDRIVER
:
1568 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
1569 ret
= proc_getdriver(ps
, p
);
1572 case USBDEVFS_CONNECTINFO
:
1573 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
1574 ret
= proc_connectinfo(ps
, p
);
1577 case USBDEVFS_SETINTERFACE
:
1578 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
1579 ret
= proc_setintf(ps
, p
);
1582 case USBDEVFS_SETCONFIGURATION
:
1583 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
1584 ret
= proc_setconfig(ps
, p
);
1587 case USBDEVFS_SUBMITURB
:
1588 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
1589 ret
= proc_submiturb(ps
, p
);
1591 inode
->i_mtime
= CURRENT_TIME
;
1594 #ifdef CONFIG_COMPAT
1596 case USBDEVFS_SUBMITURB32
:
1597 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
1598 ret
= proc_submiturb_compat(ps
, p
);
1600 inode
->i_mtime
= CURRENT_TIME
;
1603 case USBDEVFS_REAPURB32
:
1604 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
1605 ret
= proc_reapurb_compat(ps
, p
);
1608 case USBDEVFS_REAPURBNDELAY32
:
1609 snoop(&dev
->dev
, "%s: REAPURBDELAY32\n", __func__
);
1610 ret
= proc_reapurbnonblock_compat(ps
, p
);
1613 case USBDEVFS_IOCTL32
:
1614 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
1615 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
1619 case USBDEVFS_DISCARDURB
:
1620 snoop(&dev
->dev
, "%s: DISCARDURB\n", __func__
);
1621 ret
= proc_unlinkurb(ps
, p
);
1624 case USBDEVFS_REAPURB
:
1625 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
1626 ret
= proc_reapurb(ps
, p
);
1629 case USBDEVFS_REAPURBNDELAY
:
1630 snoop(&dev
->dev
, "%s: REAPURBDELAY\n", __func__
);
1631 ret
= proc_reapurbnonblock(ps
, p
);
1634 case USBDEVFS_DISCSIGNAL
:
1635 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
1636 ret
= proc_disconnectsignal(ps
, p
);
1639 case USBDEVFS_CLAIMINTERFACE
:
1640 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
1641 ret
= proc_claiminterface(ps
, p
);
1644 case USBDEVFS_RELEASEINTERFACE
:
1645 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
1646 ret
= proc_releaseinterface(ps
, p
);
1649 case USBDEVFS_IOCTL
:
1650 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
1651 ret
= proc_ioctl_default(ps
, p
);
1654 usb_unlock_device(dev
);
1656 inode
->i_atime
= CURRENT_TIME
;
1660 /* No kernel lock - fine */
1661 static unsigned int usbdev_poll(struct file
*file
,
1662 struct poll_table_struct
*wait
)
1664 struct dev_state
*ps
= file
->private_data
;
1665 unsigned int mask
= 0;
1667 poll_wait(file
, &ps
->wait
, wait
);
1668 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1669 mask
|= POLLOUT
| POLLWRNORM
;
1671 mask
|= POLLERR
| POLLHUP
;
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
,
1685 #ifdef CONFIG_USB_DEVICE_CLASS
1686 static struct class *usb_classdev_class
;
1688 static int usb_classdev_add(struct usb_device
*dev
)
1690 int minor
= ((dev
->bus
->busnum
-1) * 128) + (dev
->devnum
-1);
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
);
1701 static void usb_classdev_remove(struct usb_device
*dev
)
1703 device_unregister(dev
->usb_classdev
);
1706 static int usb_classdev_notify(struct notifier_block
*self
,
1707 unsigned long action
, void *dev
)
1710 case USB_DEVICE_ADD
:
1711 if (usb_classdev_add(dev
))
1714 case USB_DEVICE_REMOVE
:
1715 usb_classdev_remove(dev
);
1721 static struct notifier_block usbdev_nb
= {
1722 .notifier_call
= usb_classdev_notify
,
1726 static struct cdev usb_device_cdev
;
1728 int __init
usb_devio_init(void)
1732 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
1735 err("unable to register minors for usb_device");
1738 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
1739 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1741 err("unable to get usb_device major %d", USB_DEVICE_MAJOR
);
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
;
1754 usb_register_notify(&usbdev_nb
);
1760 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1764 void usb_devio_cleanup(void)
1766 #ifdef CONFIG_USB_DEVICE_CLASS
1767 usb_unregister_notify(&usbdev_nb
);
1768 class_destroy(usb_classdev_class
);
1770 cdev_del(&usb_device_cdev
);
1771 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);