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 <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
54 #include "hcd.h" /* for usbcore internals */
58 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 static struct class *usb_device_class
;
62 struct list_head asynclist
;
68 void __user
*userbuffer
;
73 static int usbfs_snoop
= 0;
74 module_param (usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
75 MODULE_PARM_DESC (usbfs_snoop
, "true to log all usbfs traffic");
77 #define snoop(dev, format, arg...) \
80 dev_info( dev , format , ## arg); \
83 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
86 #define MAX_USBFS_BUFFER_SIZE 16384
88 static inline int connected (struct usb_device
*dev
)
90 return dev
->state
!= USB_STATE_NOTATTACHED
;
93 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
101 file
->f_pos
= offset
;
105 file
->f_pos
+= offset
;
117 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
, loff_t
*ppos
)
119 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
120 struct usb_device
*dev
= ps
->dev
;
127 usb_lock_device(dev
);
128 if (!connected(dev
)) {
131 } else if (pos
< 0) {
136 if (pos
< sizeof(struct usb_device_descriptor
)) {
137 struct usb_device_descriptor
*desc
= kmalloc(sizeof(*desc
), GFP_KERNEL
);
142 memcpy(desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
143 le16_to_cpus(&desc
->bcdUSB
);
144 le16_to_cpus(&desc
->idVendor
);
145 le16_to_cpus(&desc
->idProduct
);
146 le16_to_cpus(&desc
->bcdDevice
);
148 len
= sizeof(struct usb_device_descriptor
) - pos
;
151 if (copy_to_user(buf
, ((char *)desc
) + pos
, len
)) {
164 pos
= sizeof(struct usb_device_descriptor
);
165 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
166 struct usb_config_descriptor
*config
=
167 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
168 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
170 if (*ppos
< pos
+ length
) {
172 /* The descriptor may claim to be longer than it
173 * really is. Here is the actual allocated length. */
175 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
177 len
= length
- (*ppos
- pos
);
181 /* Simply don't write (skip over) unallocated parts */
182 if (alloclen
> (*ppos
- pos
)) {
183 alloclen
-= (*ppos
- pos
);
184 if (copy_to_user(buf
,
185 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
186 min(len
, alloclen
))) {
202 usb_unlock_device(dev
);
207 * async list handling
210 static struct async
*alloc_async(unsigned int numisoframes
)
212 unsigned int assize
= sizeof(struct async
) + numisoframes
* sizeof(struct usb_iso_packet_descriptor
);
213 struct async
*as
= kzalloc(assize
, GFP_KERNEL
);
217 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
225 static void free_async(struct async
*as
)
227 kfree(as
->urb
->transfer_buffer
);
228 kfree(as
->urb
->setup_packet
);
229 usb_free_urb(as
->urb
);
233 static inline void async_newpending(struct async
*as
)
235 struct dev_state
*ps
= as
->ps
;
238 spin_lock_irqsave(&ps
->lock
, flags
);
239 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
240 spin_unlock_irqrestore(&ps
->lock
, flags
);
243 static inline void async_removepending(struct async
*as
)
245 struct dev_state
*ps
= as
->ps
;
248 spin_lock_irqsave(&ps
->lock
, flags
);
249 list_del_init(&as
->asynclist
);
250 spin_unlock_irqrestore(&ps
->lock
, flags
);
253 static inline struct async
*async_getcompleted(struct dev_state
*ps
)
256 struct async
*as
= NULL
;
258 spin_lock_irqsave(&ps
->lock
, flags
);
259 if (!list_empty(&ps
->async_completed
)) {
260 as
= list_entry(ps
->async_completed
.next
, struct async
, asynclist
);
261 list_del_init(&as
->asynclist
);
263 spin_unlock_irqrestore(&ps
->lock
, flags
);
267 static inline struct async
*async_getpending(struct dev_state
*ps
, void __user
*userurb
)
272 spin_lock_irqsave(&ps
->lock
, flags
);
273 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
274 if (as
->userurb
== userurb
) {
275 list_del_init(&as
->asynclist
);
276 spin_unlock_irqrestore(&ps
->lock
, flags
);
279 spin_unlock_irqrestore(&ps
->lock
, flags
);
283 static void snoop_urb(struct urb
*urb
, void __user
*userurb
)
286 unsigned char *data
= urb
->transfer_buffer
;
291 if (urb
->pipe
& USB_DIR_IN
)
292 dev_info(&urb
->dev
->dev
, "direction=IN\n");
294 dev_info(&urb
->dev
->dev
, "direction=OUT\n");
295 dev_info(&urb
->dev
->dev
, "userurb=%p\n", userurb
);
296 dev_info(&urb
->dev
->dev
, "transfer_buffer_length=%d\n",
297 urb
->transfer_buffer_length
);
298 dev_info(&urb
->dev
->dev
, "actual_length=%d\n", urb
->actual_length
);
299 dev_info(&urb
->dev
->dev
, "data: ");
300 for (j
= 0; j
< urb
->transfer_buffer_length
; ++j
)
301 printk ("%02x ", data
[j
]);
305 static void async_completed(struct urb
*urb
, struct pt_regs
*regs
)
307 struct async
*as
= (struct async
*)urb
->context
;
308 struct dev_state
*ps
= as
->ps
;
309 struct siginfo sinfo
;
311 spin_lock(&ps
->lock
);
312 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
313 spin_unlock(&ps
->lock
);
315 sinfo
.si_signo
= as
->signr
;
316 sinfo
.si_errno
= as
->urb
->status
;
317 sinfo
.si_code
= SI_ASYNCIO
;
318 sinfo
.si_addr
= as
->userurb
;
319 kill_proc_info_as_uid(as
->signr
, &sinfo
, as
->pid
, as
->uid
,
322 snoop(&urb
->dev
->dev
, "urb complete\n");
323 snoop_urb(urb
, as
->userurb
);
327 static void destroy_async (struct dev_state
*ps
, struct list_head
*list
)
332 spin_lock_irqsave(&ps
->lock
, flags
);
333 while (!list_empty(list
)) {
334 as
= list_entry(list
->next
, struct async
, asynclist
);
335 list_del_init(&as
->asynclist
);
337 /* drop the spinlock so the completion handler can run */
338 spin_unlock_irqrestore(&ps
->lock
, flags
);
339 usb_kill_urb(as
->urb
);
340 spin_lock_irqsave(&ps
->lock
, flags
);
342 spin_unlock_irqrestore(&ps
->lock
, flags
);
343 as
= async_getcompleted(ps
);
346 as
= async_getcompleted(ps
);
350 static void destroy_async_on_interface (struct dev_state
*ps
, unsigned int ifnum
)
352 struct list_head
*p
, *q
, hitlist
;
355 INIT_LIST_HEAD(&hitlist
);
356 spin_lock_irqsave(&ps
->lock
, flags
);
357 list_for_each_safe(p
, q
, &ps
->async_pending
)
358 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
359 list_move_tail(p
, &hitlist
);
360 spin_unlock_irqrestore(&ps
->lock
, flags
);
361 destroy_async(ps
, &hitlist
);
364 static inline void destroy_all_async(struct dev_state
*ps
)
366 destroy_async(ps
, &ps
->async_pending
);
370 * interface claims are made only at the request of user level code,
371 * which can also release them (explicitly or by closing files).
372 * they're also undone when devices disconnect.
375 static int driver_probe (struct usb_interface
*intf
,
376 const struct usb_device_id
*id
)
381 static void driver_disconnect(struct usb_interface
*intf
)
383 struct dev_state
*ps
= usb_get_intfdata (intf
);
384 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
389 /* NOTE: this relies on usbcore having canceled and completed
390 * all pending I/O requests; 2.6 does that.
393 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
394 clear_bit(ifnum
, &ps
->ifclaimed
);
396 warn("interface number %u out of range", ifnum
);
398 usb_set_intfdata (intf
, NULL
);
400 /* force async requests to complete */
401 destroy_async_on_interface(ps
, ifnum
);
404 struct usb_driver usbfs_driver
= {
405 .owner
= THIS_MODULE
,
407 .probe
= driver_probe
,
408 .disconnect
= driver_disconnect
,
411 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
413 struct usb_device
*dev
= ps
->dev
;
414 struct usb_interface
*intf
;
417 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
419 /* already claimed */
420 if (test_bit(ifnum
, &ps
->ifclaimed
))
423 /* lock against other changes to driver bindings */
424 down_write(&usb_bus_type
.subsys
.rwsem
);
425 intf
= usb_ifnum_to_if(dev
, ifnum
);
429 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
430 up_write(&usb_bus_type
.subsys
.rwsem
);
432 set_bit(ifnum
, &ps
->ifclaimed
);
436 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
438 struct usb_device
*dev
;
439 struct usb_interface
*intf
;
443 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
446 /* lock against other changes to driver bindings */
447 down_write(&usb_bus_type
.subsys
.rwsem
);
448 intf
= usb_ifnum_to_if(dev
, ifnum
);
451 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
452 usb_driver_release_interface(&usbfs_driver
, intf
);
455 up_write(&usb_bus_type
.subsys
.rwsem
);
459 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
461 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
462 return -EHOSTUNREACH
;
463 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
465 if (test_bit(ifnum
, &ps
->ifclaimed
))
467 /* if not yet claimed, claim it for the driver */
468 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim interface %u before use\n",
469 current
->pid
, current
->comm
, ifnum
);
470 return claimintf(ps
, ifnum
);
473 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
475 unsigned int i
, j
, e
;
476 struct usb_interface
*intf
;
477 struct usb_host_interface
*alts
;
478 struct usb_endpoint_descriptor
*endpt
;
480 if (ep
& ~(USB_DIR_IN
|0xf))
484 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
485 intf
= dev
->actconfig
->interface
[i
];
486 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
487 alts
= &intf
->altsetting
[j
];
488 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
489 endpt
= &alts
->endpoint
[e
].desc
;
490 if (endpt
->bEndpointAddress
== ep
)
491 return alts
->desc
.bInterfaceNumber
;
498 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
, unsigned int index
)
502 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
503 return -EHOSTUNREACH
;
504 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
508 switch (requesttype
& USB_RECIP_MASK
) {
509 case USB_RECIP_ENDPOINT
:
510 if ((ret
= findintfep(ps
->dev
, index
)) >= 0)
511 ret
= checkintf(ps
, ret
);
514 case USB_RECIP_INTERFACE
:
515 ret
= checkintf(ps
, index
);
521 static struct usb_device
*usbdev_lookup_minor(int minor
)
523 struct class_device
*class_dev
;
524 struct usb_device
*dev
= NULL
;
526 down(&usb_device_class
->sem
);
527 list_for_each_entry(class_dev
, &usb_device_class
->children
, node
) {
528 if (class_dev
->devt
== MKDEV(USB_DEVICE_MAJOR
, minor
)) {
529 dev
= class_dev
->class_data
;
533 up(&usb_device_class
->sem
);
541 static int usbdev_open(struct inode
*inode
, struct file
*file
)
543 struct usb_device
*dev
= NULL
;
544 struct dev_state
*ps
;
548 * no locking necessary here, as chrdev_open has the kernel lock
549 * (still acquire the kernel lock for safety)
552 if (!(ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
)))
557 /* check if we are called from a real node or usbfs */
558 if (imajor(inode
) == USB_DEVICE_MAJOR
)
559 dev
= usbdev_lookup_minor(iminor(inode
));
561 dev
= inode
->u
.generic_ip
;
570 spin_lock_init(&ps
->lock
);
571 INIT_LIST_HEAD(&ps
->async_pending
);
572 INIT_LIST_HEAD(&ps
->async_completed
);
573 init_waitqueue_head(&ps
->wait
);
575 ps
->disc_pid
= current
->pid
;
576 ps
->disc_uid
= current
->uid
;
577 ps
->disc_euid
= current
->euid
;
578 ps
->disccontext
= NULL
;
581 list_add_tail(&ps
->list
, &dev
->filelist
);
582 file
->private_data
= ps
;
589 static int usbdev_release(struct inode
*inode
, struct file
*file
)
591 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
592 struct usb_device
*dev
= ps
->dev
;
595 usb_lock_device(dev
);
596 list_del_init(&ps
->list
);
597 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
599 if (test_bit(ifnum
, &ps
->ifclaimed
))
600 releaseintf(ps
, ifnum
);
602 destroy_all_async(ps
);
603 usb_unlock_device(dev
);
610 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
612 struct usb_device
*dev
= ps
->dev
;
613 struct usbdevfs_ctrltransfer ctrl
;
618 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
620 if ((ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
)))
622 if (ctrl
.wLength
> PAGE_SIZE
)
624 if (!(tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
)))
627 if (ctrl
.bRequestType
& 0x80) {
628 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
, ctrl
.wLength
)) {
629 free_page((unsigned long)tbuf
);
632 snoop(&dev
->dev
, "control read: bRequest=%02x "
633 "bRrequestType=%02x wValue=%04x "
634 "wIndex=%04x wLength=%04x\n",
635 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
636 ctrl
.wIndex
, ctrl
.wLength
);
638 usb_unlock_device(dev
);
639 i
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
640 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
641 usb_lock_device(dev
);
642 if ((i
> 0) && ctrl
.wLength
) {
644 dev_info(&dev
->dev
, "control read: data ");
645 for (j
= 0; j
< i
; ++j
)
646 printk("%02x ", (unsigned char)(tbuf
)[j
]);
649 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
650 free_page((unsigned long)tbuf
);
656 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
657 free_page((unsigned long)tbuf
);
661 snoop(&dev
->dev
, "control write: bRequest=%02x "
662 "bRrequestType=%02x wValue=%04x "
663 "wIndex=%04x wLength=%04x\n",
664 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
665 ctrl
.wIndex
, ctrl
.wLength
);
667 dev_info(&dev
->dev
, "control write: data: ");
668 for (j
= 0; j
< ctrl
.wLength
; ++j
)
669 printk("%02x ", (unsigned char)(tbuf
)[j
]);
672 usb_unlock_device(dev
);
673 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
674 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
675 usb_lock_device(dev
);
677 free_page((unsigned long)tbuf
);
678 if (i
<0 && i
!= -EPIPE
) {
679 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
680 "failed cmd %s rqt %u rq %u len %u ret %d\n",
681 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
687 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
689 struct usb_device
*dev
= ps
->dev
;
690 struct usbdevfs_bulktransfer bulk
;
691 unsigned int tmo
, len1
, pipe
;
696 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
698 if ((ret
= findintfep(ps
->dev
, bulk
.ep
)) < 0)
700 if ((ret
= checkintf(ps
, ret
)))
702 if (bulk
.ep
& USB_DIR_IN
)
703 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
705 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
706 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
709 if (len1
> MAX_USBFS_BUFFER_SIZE
)
711 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
714 if (bulk
.ep
& 0x80) {
715 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
719 snoop(&dev
->dev
, "bulk read: len=0x%02x timeout=%04d\n",
720 bulk
.len
, bulk
.timeout
);
721 usb_unlock_device(dev
);
722 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
723 usb_lock_device(dev
);
726 dev_info(&dev
->dev
, "bulk read: data ");
727 for (j
= 0; j
< len2
; ++j
)
728 printk("%02x ", (unsigned char)(tbuf
)[j
]);
731 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
738 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
743 snoop(&dev
->dev
, "bulk write: len=0x%02x timeout=%04d\n",
744 bulk
.len
, bulk
.timeout
);
746 dev_info(&dev
->dev
, "bulk write: data: ");
747 for (j
= 0; j
< len1
; ++j
)
748 printk("%02x ", (unsigned char)(tbuf
)[j
]);
751 usb_unlock_device(dev
);
752 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
753 usb_lock_device(dev
);
761 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
766 if (get_user(ep
, (unsigned int __user
*)arg
))
768 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
770 if ((ret
= checkintf(ps
, ret
)))
772 usb_settoggle(ps
->dev
, ep
& 0xf, !(ep
& USB_DIR_IN
), 0);
776 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
782 if (get_user(ep
, (unsigned int __user
*)arg
))
784 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
786 if ((ret
= checkintf(ps
, ret
)))
789 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
791 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
793 return usb_clear_halt(ps
->dev
, pipe
);
797 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
799 struct usbdevfs_getdriver gd
;
800 struct usb_interface
*intf
;
803 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
805 down_read(&usb_bus_type
.subsys
.rwsem
);
806 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
807 if (!intf
|| !intf
->dev
.driver
)
810 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
812 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
814 up_read(&usb_bus_type
.subsys
.rwsem
);
818 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
820 struct usbdevfs_connectinfo ci
;
822 ci
.devnum
= ps
->dev
->devnum
;
823 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
824 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
829 static int proc_resetdevice(struct dev_state
*ps
)
831 return usb_reset_device(ps
->dev
);
835 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
837 struct usbdevfs_setinterface setintf
;
840 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
842 if ((ret
= checkintf(ps
, setintf
.interface
)))
844 return usb_set_interface(ps
->dev
, setintf
.interface
,
848 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
852 struct usb_host_config
*actconfig
;
854 if (get_user(u
, (unsigned int __user
*)arg
))
857 actconfig
= ps
->dev
->actconfig
;
859 /* Don't touch the device if any interfaces are claimed.
860 * It could interfere with other drivers' operations, and if
861 * an interface is claimed by usbfs it could easily deadlock.
866 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
867 if (usb_interface_claimed(actconfig
->interface
[i
])) {
868 dev_warn (&ps
->dev
->dev
,
869 "usbfs: interface %d claimed by %s "
870 "while '%s' sets config #%d\n",
871 actconfig
->interface
[i
]
873 ->desc
.bInterfaceNumber
,
874 actconfig
->interface
[i
]
883 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
884 * so avoid usb_set_configuration()'s kick to sysfs
887 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
888 status
= usb_reset_configuration(ps
->dev
);
890 status
= usb_set_configuration(ps
->dev
, u
);
896 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
897 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
900 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
901 struct usb_host_endpoint
*ep
;
903 struct usb_ctrlrequest
*dr
= NULL
;
904 unsigned int u
, totlen
, isofrmlen
;
905 int ret
, interval
= 0, ifnum
= -1;
907 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|USBDEVFS_URB_SHORT_NOT_OK
|
908 URB_NO_FSBR
|URB_ZERO_PACKET
))
912 if (uurb
->signr
!= 0 && (uurb
->signr
< SIGRTMIN
|| uurb
->signr
> SIGRTMAX
))
914 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&& (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
915 if ((ifnum
= findintfep(ps
->dev
, uurb
->endpoint
)) < 0)
917 if ((ret
= checkintf(ps
, ifnum
)))
920 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0)
921 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
923 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
927 case USBDEVFS_URB_TYPE_CONTROL
:
928 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
929 != USB_ENDPOINT_XFER_CONTROL
)
931 /* min 8 byte setup packet, max arbitrary */
932 if (uurb
->buffer_length
< 8 || uurb
->buffer_length
> PAGE_SIZE
)
934 if (!(dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
)))
936 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
940 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
944 if ((ret
= check_ctrlrecip(ps
, dr
->bRequestType
, le16_to_cpup(&dr
->wIndex
)))) {
948 uurb
->endpoint
= (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) | (dr
->bRequestType
& USB_ENDPOINT_DIR_MASK
);
949 uurb
->number_of_packets
= 0;
950 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
952 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
)) {
956 snoop(&ps
->dev
->dev
, "control urb\n");
959 case USBDEVFS_URB_TYPE_BULK
:
960 switch (ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) {
961 case USB_ENDPOINT_XFER_CONTROL
:
962 case USB_ENDPOINT_XFER_ISOC
:
964 /* allow single-shot interrupt transfers, at bogus rates */
966 uurb
->number_of_packets
= 0;
967 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
969 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
971 snoop(&ps
->dev
->dev
, "bulk urb\n");
974 case USBDEVFS_URB_TYPE_ISO
:
975 /* arbitrary limit */
976 if (uurb
->number_of_packets
< 1 || uurb
->number_of_packets
> 128)
978 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
979 != USB_ENDPOINT_XFER_ISOC
)
981 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
982 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) * uurb
->number_of_packets
;
983 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
985 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
989 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
990 if (isopkt
[u
].length
> 1023) {
994 totlen
+= isopkt
[u
].length
;
996 if (totlen
> 32768) {
1000 uurb
->buffer_length
= totlen
;
1001 snoop(&ps
->dev
->dev
, "iso urb\n");
1004 case USBDEVFS_URB_TYPE_INTERRUPT
:
1005 uurb
->number_of_packets
= 0;
1006 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
1007 != USB_ENDPOINT_XFER_INT
)
1009 if (ps
->dev
->speed
== USB_SPEED_HIGH
)
1010 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
1012 interval
= ep
->desc
.bInterval
;
1013 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1015 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
1017 snoop(&ps
->dev
->dev
, "interrupt urb\n");
1023 if (!(as
= alloc_async(uurb
->number_of_packets
))) {
1028 if (!(as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
, GFP_KERNEL
))) {
1034 as
->urb
->dev
= ps
->dev
;
1035 as
->urb
->pipe
= (uurb
->type
<< 30) | __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) | (uurb
->endpoint
& USB_DIR_IN
);
1036 as
->urb
->transfer_flags
= uurb
->flags
;
1037 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1038 as
->urb
->setup_packet
= (unsigned char*)dr
;
1039 as
->urb
->start_frame
= uurb
->start_frame
;
1040 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
1041 as
->urb
->interval
= interval
;
1042 as
->urb
->context
= as
;
1043 as
->urb
->complete
= async_completed
;
1044 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1045 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1046 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1047 totlen
+= isopkt
[u
].length
;
1052 if (uurb
->endpoint
& USB_DIR_IN
)
1053 as
->userbuffer
= uurb
->buffer
;
1055 as
->userbuffer
= NULL
;
1056 as
->signr
= uurb
->signr
;
1058 as
->pid
= current
->pid
;
1059 as
->uid
= current
->uid
;
1060 as
->euid
= current
->euid
;
1061 if (!(uurb
->endpoint
& USB_DIR_IN
)) {
1062 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
, as
->urb
->transfer_buffer_length
)) {
1067 snoop(&as
->urb
->dev
->dev
, "submit urb\n");
1068 snoop_urb(as
->urb
, as
->userurb
);
1069 async_newpending(as
);
1070 if ((ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
))) {
1071 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
, "usbfs: usb_submit_urb returned %d\n", ret
);
1072 async_removepending(as
);
1079 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1081 struct usbdevfs_urb uurb
;
1083 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1086 return proc_do_submiturb(ps
, &uurb
, (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
), arg
);
1089 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1093 as
= async_getpending(ps
, arg
);
1096 usb_kill_urb(as
->urb
);
1100 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1102 struct urb
*urb
= as
->urb
;
1103 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1104 void __user
*addr
= as
->userurb
;
1108 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1110 if (put_user(urb
->status
, &userurb
->status
))
1112 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1114 if (put_user(urb
->error_count
, &userurb
->error_count
))
1117 if (usb_pipeisoc(urb
->pipe
)) {
1118 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1119 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1120 &userurb
->iso_frame_desc
[i
].actual_length
))
1122 if (put_user(urb
->iso_frame_desc
[i
].status
,
1123 &userurb
->iso_frame_desc
[i
].status
))
1130 if (put_user(addr
, (void __user
* __user
*)arg
))
1135 static struct async
* reap_as(struct dev_state
*ps
)
1137 DECLARE_WAITQUEUE(wait
, current
);
1138 struct async
*as
= NULL
;
1139 struct usb_device
*dev
= ps
->dev
;
1141 add_wait_queue(&ps
->wait
, &wait
);
1143 __set_current_state(TASK_INTERRUPTIBLE
);
1144 if ((as
= async_getcompleted(ps
)))
1146 if (signal_pending(current
))
1148 usb_unlock_device(dev
);
1150 usb_lock_device(dev
);
1152 remove_wait_queue(&ps
->wait
, &wait
);
1153 set_current_state(TASK_RUNNING
);
1157 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1159 struct async
*as
= reap_as(ps
);
1161 return processcompl(as
, (void __user
* __user
*)arg
);
1162 if (signal_pending(current
))
1167 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1171 if (!(as
= async_getcompleted(ps
)))
1173 return processcompl(as
, (void __user
* __user
*)arg
);
1176 #ifdef CONFIG_COMPAT
1178 static int get_urb32(struct usbdevfs_urb
*kurb
,
1179 struct usbdevfs_urb32 __user
*uurb
)
1182 if (get_user(kurb
->type
, &uurb
->type
) ||
1183 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1184 __get_user(kurb
->status
, &uurb
->status
) ||
1185 __get_user(kurb
->flags
, &uurb
->flags
) ||
1186 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1187 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1188 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1189 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1190 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1191 __get_user(kurb
->signr
, &uurb
->signr
))
1194 if (__get_user(uptr
, &uurb
->buffer
))
1196 kurb
->buffer
= compat_ptr(uptr
);
1197 if (__get_user(uptr
, &uurb
->buffer
))
1199 kurb
->usercontext
= compat_ptr(uptr
);
1204 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1206 struct usbdevfs_urb uurb
;
1208 if (get_urb32(&uurb
,(struct usbdevfs_urb32
*)arg
))
1211 return proc_do_submiturb(ps
, &uurb
, ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
, arg
);
1214 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1216 struct urb
*urb
= as
->urb
;
1217 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1218 void __user
*addr
= as
->userurb
;
1222 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1224 if (put_user(urb
->status
, &userurb
->status
))
1226 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1228 if (put_user(urb
->error_count
, &userurb
->error_count
))
1231 if (usb_pipeisoc(urb
->pipe
)) {
1232 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1233 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1234 &userurb
->iso_frame_desc
[i
].actual_length
))
1236 if (put_user(urb
->iso_frame_desc
[i
].status
,
1237 &userurb
->iso_frame_desc
[i
].status
))
1243 if (put_user((u32
)(u64
)addr
, (u32 __user
*)arg
))
1248 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1250 struct async
*as
= reap_as(ps
);
1252 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1253 if (signal_pending(current
))
1258 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1262 if (!(as
= async_getcompleted(ps
)))
1264 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1269 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1271 struct usbdevfs_disconnectsignal ds
;
1273 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1275 if (ds
.signr
!= 0 && (ds
.signr
< SIGRTMIN
|| ds
.signr
> SIGRTMAX
))
1277 ps
->discsignr
= ds
.signr
;
1278 ps
->disccontext
= ds
.context
;
1282 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1286 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1288 return claimintf(ps
, ifnum
);
1291 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1296 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1298 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1300 destroy_async_on_interface (ps
, ifnum
);
1304 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1309 struct usb_interface
*intf
= NULL
;
1310 struct usb_driver
*driver
= NULL
;
1313 if ((size
= _IOC_SIZE (ctl
->ioctl_code
)) > 0) {
1314 if ((buf
= kmalloc (size
, GFP_KERNEL
)) == NULL
)
1316 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1317 if (copy_from_user (buf
, ctl
->data
, size
)) {
1322 memset (buf
, 0, size
);
1326 if (!connected(ps
->dev
)) {
1331 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1332 retval
= -EHOSTUNREACH
;
1333 else if (!(intf
= usb_ifnum_to_if (ps
->dev
, ctl
->ifno
)))
1335 else switch (ctl
->ioctl_code
) {
1337 /* disconnect kernel driver from interface */
1338 case USBDEVFS_DISCONNECT
:
1340 down_write(&usb_bus_type
.subsys
.rwsem
);
1341 if (intf
->dev
.driver
) {
1342 driver
= to_usb_driver(intf
->dev
.driver
);
1343 dev_dbg (&intf
->dev
, "disconnect by usbfs\n");
1344 usb_driver_release_interface(driver
, intf
);
1347 up_write(&usb_bus_type
.subsys
.rwsem
);
1350 /* let kernel drivers try to (re)bind to the interface */
1351 case USBDEVFS_CONNECT
:
1352 usb_unlock_device(ps
->dev
);
1353 usb_lock_all_devices();
1354 bus_rescan_devices(intf
->dev
.bus
);
1355 usb_unlock_all_devices();
1356 usb_lock_device(ps
->dev
);
1359 /* talk directly to the interface's driver */
1361 down_read(&usb_bus_type
.subsys
.rwsem
);
1362 if (intf
->dev
.driver
)
1363 driver
= to_usb_driver(intf
->dev
.driver
);
1364 if (driver
== NULL
|| driver
->ioctl
== NULL
) {
1367 retval
= driver
->ioctl (intf
, ctl
->ioctl_code
, buf
);
1368 if (retval
== -ENOIOCTLCMD
)
1371 up_read(&usb_bus_type
.subsys
.rwsem
);
1374 /* cleanup and return */
1376 && (_IOC_DIR (ctl
->ioctl_code
) & _IOC_READ
) != 0
1378 && copy_to_user (ctl
->data
, buf
, size
) != 0)
1385 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1387 struct usbdevfs_ioctl ctrl
;
1389 if (copy_from_user(&ctrl
, arg
, sizeof (ctrl
)))
1391 return proc_ioctl(ps
, &ctrl
);
1394 #ifdef CONFIG_COMPAT
1395 static int proc_ioctl_compat(struct dev_state
*ps
, void __user
*arg
)
1397 struct usbdevfs_ioctl32 __user
*uioc
;
1398 struct usbdevfs_ioctl ctrl
;
1401 uioc
= compat_ptr(arg
);
1402 if (get_user(ctrl
.ifno
, &uioc
->ifno
) ||
1403 get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
1404 __get_user(udata
, &uioc
->data
))
1406 ctrl
.data
= compat_ptr(udata
);
1408 return proc_ioctl(ps
, &ctrl
);
1413 * NOTE: All requests here that have interface numbers as parameters
1414 * are assuming that somehow the configuration has been prevented from
1415 * changing. But there's no mechanism to ensure that...
1417 static int usbdev_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1419 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1420 struct usb_device
*dev
= ps
->dev
;
1421 void __user
*p
= (void __user
*)arg
;
1424 if (!(file
->f_mode
& FMODE_WRITE
))
1426 usb_lock_device(dev
);
1427 if (!connected(dev
)) {
1428 usb_unlock_device(dev
);
1433 case USBDEVFS_CONTROL
:
1434 snoop(&dev
->dev
, "%s: CONTROL\n", __FUNCTION__
);
1435 ret
= proc_control(ps
, p
);
1437 inode
->i_mtime
= CURRENT_TIME
;
1441 snoop(&dev
->dev
, "%s: BULK\n", __FUNCTION__
);
1442 ret
= proc_bulk(ps
, p
);
1444 inode
->i_mtime
= CURRENT_TIME
;
1447 case USBDEVFS_RESETEP
:
1448 snoop(&dev
->dev
, "%s: RESETEP\n", __FUNCTION__
);
1449 ret
= proc_resetep(ps
, p
);
1451 inode
->i_mtime
= CURRENT_TIME
;
1454 case USBDEVFS_RESET
:
1455 snoop(&dev
->dev
, "%s: RESET\n", __FUNCTION__
);
1456 ret
= proc_resetdevice(ps
);
1459 case USBDEVFS_CLEAR_HALT
:
1460 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __FUNCTION__
);
1461 ret
= proc_clearhalt(ps
, p
);
1463 inode
->i_mtime
= CURRENT_TIME
;
1466 case USBDEVFS_GETDRIVER
:
1467 snoop(&dev
->dev
, "%s: GETDRIVER\n", __FUNCTION__
);
1468 ret
= proc_getdriver(ps
, p
);
1471 case USBDEVFS_CONNECTINFO
:
1472 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __FUNCTION__
);
1473 ret
= proc_connectinfo(ps
, p
);
1476 case USBDEVFS_SETINTERFACE
:
1477 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __FUNCTION__
);
1478 ret
= proc_setintf(ps
, p
);
1481 case USBDEVFS_SETCONFIGURATION
:
1482 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __FUNCTION__
);
1483 ret
= proc_setconfig(ps
, p
);
1486 case USBDEVFS_SUBMITURB
:
1487 snoop(&dev
->dev
, "%s: SUBMITURB\n", __FUNCTION__
);
1488 ret
= proc_submiturb(ps
, p
);
1490 inode
->i_mtime
= CURRENT_TIME
;
1493 #ifdef CONFIG_COMPAT
1495 case USBDEVFS_SUBMITURB32
:
1496 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __FUNCTION__
);
1497 ret
= proc_submiturb_compat(ps
, p
);
1499 inode
->i_mtime
= CURRENT_TIME
;
1502 case USBDEVFS_REAPURB32
:
1503 snoop(&dev
->dev
, "%s: REAPURB32\n", __FUNCTION__
);
1504 ret
= proc_reapurb_compat(ps
, p
);
1507 case USBDEVFS_REAPURBNDELAY32
:
1508 snoop(&dev
->dev
, "%s: REAPURBDELAY32\n", __FUNCTION__
);
1509 ret
= proc_reapurbnonblock_compat(ps
, p
);
1512 case USBDEVFS_IOCTL32
:
1513 snoop(&dev
->dev
, "%s: IOCTL\n", __FUNCTION__
);
1514 ret
= proc_ioctl_compat(ps
, p
);
1518 case USBDEVFS_DISCARDURB
:
1519 snoop(&dev
->dev
, "%s: DISCARDURB\n", __FUNCTION__
);
1520 ret
= proc_unlinkurb(ps
, p
);
1523 case USBDEVFS_REAPURB
:
1524 snoop(&dev
->dev
, "%s: REAPURB\n", __FUNCTION__
);
1525 ret
= proc_reapurb(ps
, p
);
1528 case USBDEVFS_REAPURBNDELAY
:
1529 snoop(&dev
->dev
, "%s: REAPURBDELAY\n", __FUNCTION__
);
1530 ret
= proc_reapurbnonblock(ps
, p
);
1533 case USBDEVFS_DISCSIGNAL
:
1534 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __FUNCTION__
);
1535 ret
= proc_disconnectsignal(ps
, p
);
1538 case USBDEVFS_CLAIMINTERFACE
:
1539 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __FUNCTION__
);
1540 ret
= proc_claiminterface(ps
, p
);
1543 case USBDEVFS_RELEASEINTERFACE
:
1544 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __FUNCTION__
);
1545 ret
= proc_releaseinterface(ps
, p
);
1548 case USBDEVFS_IOCTL
:
1549 snoop(&dev
->dev
, "%s: IOCTL\n", __FUNCTION__
);
1550 ret
= proc_ioctl_default(ps
, p
);
1553 usb_unlock_device(dev
);
1555 inode
->i_atime
= CURRENT_TIME
;
1559 /* No kernel lock - fine */
1560 static unsigned int usbdev_poll(struct file
*file
, struct poll_table_struct
*wait
)
1562 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1563 unsigned int mask
= 0;
1565 poll_wait(file
, &ps
->wait
, wait
);
1566 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1567 mask
|= POLLOUT
| POLLWRNORM
;
1568 if (!connected(ps
->dev
))
1569 mask
|= POLLERR
| POLLHUP
;
1573 struct file_operations usbfs_device_file_operations
= {
1574 .llseek
= usbdev_lseek
,
1575 .read
= usbdev_read
,
1576 .poll
= usbdev_poll
,
1577 .ioctl
= usbdev_ioctl
,
1578 .open
= usbdev_open
,
1579 .release
= usbdev_release
,
1582 static void usbdev_add(struct usb_device
*dev
)
1584 int minor
= ((dev
->bus
->busnum
-1) * 128) + (dev
->devnum
-1);
1586 dev
->class_dev
= class_device_create(usb_device_class
, NULL
,
1587 MKDEV(USB_DEVICE_MAJOR
, minor
), &dev
->dev
,
1588 "usbdev%d.%d", dev
->bus
->busnum
, dev
->devnum
);
1590 dev
->class_dev
->class_data
= dev
;
1593 static void usbdev_remove(struct usb_device
*dev
)
1595 class_device_unregister(dev
->class_dev
);
1598 static int usbdev_notify(struct notifier_block
*self
, unsigned long action
,
1602 case USB_DEVICE_ADD
:
1605 case USB_DEVICE_REMOVE
:
1612 static struct notifier_block usbdev_nb
= {
1613 .notifier_call
= usbdev_notify
,
1616 static struct cdev usb_device_cdev
= {
1617 .kobj
= {.name
= "usb_device", },
1618 .owner
= THIS_MODULE
,
1621 int __init
usbdev_init(void)
1625 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
1628 err("unable to register minors for usb_device");
1631 cdev_init(&usb_device_cdev
, &usbfs_device_file_operations
);
1632 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1634 err("unable to get usb_device major %d", USB_DEVICE_MAJOR
);
1637 usb_device_class
= class_create(THIS_MODULE
, "usb_device");
1638 if (IS_ERR(usb_device_class
)) {
1639 err("unable to register usb_device class");
1640 retval
= PTR_ERR(usb_device_class
);
1644 usb_register_notify(&usbdev_nb
);
1650 usb_device_class
= NULL
;
1651 cdev_del(&usb_device_cdev
);
1654 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1658 void usbdev_cleanup(void)
1660 usb_unregister_notify(&usbdev_nb
);
1661 class_destroy(usb_device_class
);
1662 cdev_del(&usb_device_cdev
);
1663 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);