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
60 static struct class *usb_device_class
;
63 struct list_head asynclist
;
69 void __user
*userbuffer
;
75 static int usbfs_snoop
= 0;
76 module_param (usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
77 MODULE_PARM_DESC (usbfs_snoop
, "true to log all usbfs traffic");
79 #define snoop(dev, format, arg...) \
82 dev_info( dev , format , ## arg); \
85 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
88 #define MAX_USBFS_BUFFER_SIZE 16384
90 static inline int connected (struct usb_device
*dev
)
92 return dev
->state
!= USB_STATE_NOTATTACHED
;
95 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
103 file
->f_pos
= offset
;
107 file
->f_pos
+= offset
;
119 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
, loff_t
*ppos
)
121 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
122 struct usb_device
*dev
= ps
->dev
;
129 usb_lock_device(dev
);
130 if (!connected(dev
)) {
133 } else if (pos
< 0) {
138 if (pos
< sizeof(struct usb_device_descriptor
)) {
139 struct usb_device_descriptor temp_desc
; /* 18 bytes - fits on the stack */
141 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
142 le16_to_cpus(&temp_desc
.bcdUSB
);
143 le16_to_cpus(&temp_desc
.idVendor
);
144 le16_to_cpus(&temp_desc
.idProduct
);
145 le16_to_cpus(&temp_desc
.bcdDevice
);
147 len
= sizeof(struct usb_device_descriptor
) - pos
;
150 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
161 pos
= sizeof(struct usb_device_descriptor
);
162 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
163 struct usb_config_descriptor
*config
=
164 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
165 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
167 if (*ppos
< pos
+ length
) {
169 /* The descriptor may claim to be longer than it
170 * really is. Here is the actual allocated length. */
172 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
174 len
= length
- (*ppos
- pos
);
178 /* Simply don't write (skip over) unallocated parts */
179 if (alloclen
> (*ppos
- pos
)) {
180 alloclen
-= (*ppos
- pos
);
181 if (copy_to_user(buf
,
182 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
183 min(len
, alloclen
))) {
199 usb_unlock_device(dev
);
204 * async list handling
207 static struct async
*alloc_async(unsigned int numisoframes
)
209 unsigned int assize
= sizeof(struct async
) + numisoframes
* sizeof(struct usb_iso_packet_descriptor
);
210 struct async
*as
= kzalloc(assize
, GFP_KERNEL
);
214 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
222 static void free_async(struct async
*as
)
224 kfree(as
->urb
->transfer_buffer
);
225 kfree(as
->urb
->setup_packet
);
226 usb_free_urb(as
->urb
);
230 static inline void async_newpending(struct async
*as
)
232 struct dev_state
*ps
= as
->ps
;
235 spin_lock_irqsave(&ps
->lock
, flags
);
236 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
237 spin_unlock_irqrestore(&ps
->lock
, flags
);
240 static inline void async_removepending(struct async
*as
)
242 struct dev_state
*ps
= as
->ps
;
245 spin_lock_irqsave(&ps
->lock
, flags
);
246 list_del_init(&as
->asynclist
);
247 spin_unlock_irqrestore(&ps
->lock
, flags
);
250 static inline struct async
*async_getcompleted(struct dev_state
*ps
)
253 struct async
*as
= NULL
;
255 spin_lock_irqsave(&ps
->lock
, flags
);
256 if (!list_empty(&ps
->async_completed
)) {
257 as
= list_entry(ps
->async_completed
.next
, struct async
, asynclist
);
258 list_del_init(&as
->asynclist
);
260 spin_unlock_irqrestore(&ps
->lock
, flags
);
264 static inline struct async
*async_getpending(struct dev_state
*ps
, void __user
*userurb
)
269 spin_lock_irqsave(&ps
->lock
, flags
);
270 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
271 if (as
->userurb
== userurb
) {
272 list_del_init(&as
->asynclist
);
273 spin_unlock_irqrestore(&ps
->lock
, flags
);
276 spin_unlock_irqrestore(&ps
->lock
, flags
);
280 static void snoop_urb(struct urb
*urb
, void __user
*userurb
)
283 unsigned char *data
= urb
->transfer_buffer
;
288 if (urb
->pipe
& USB_DIR_IN
)
289 dev_info(&urb
->dev
->dev
, "direction=IN\n");
291 dev_info(&urb
->dev
->dev
, "direction=OUT\n");
292 dev_info(&urb
->dev
->dev
, "userurb=%p\n", userurb
);
293 dev_info(&urb
->dev
->dev
, "transfer_buffer_length=%d\n",
294 urb
->transfer_buffer_length
);
295 dev_info(&urb
->dev
->dev
, "actual_length=%d\n", urb
->actual_length
);
296 dev_info(&urb
->dev
->dev
, "data: ");
297 for (j
= 0; j
< urb
->transfer_buffer_length
; ++j
)
298 printk ("%02x ", data
[j
]);
302 static void async_completed(struct urb
*urb
, struct pt_regs
*regs
)
304 struct async
*as
= (struct async
*)urb
->context
;
305 struct dev_state
*ps
= as
->ps
;
306 struct siginfo sinfo
;
308 spin_lock(&ps
->lock
);
309 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
310 spin_unlock(&ps
->lock
);
312 sinfo
.si_signo
= as
->signr
;
313 sinfo
.si_errno
= as
->urb
->status
;
314 sinfo
.si_code
= SI_ASYNCIO
;
315 sinfo
.si_addr
= as
->userurb
;
316 kill_proc_info_as_uid(as
->signr
, &sinfo
, as
->pid
, as
->uid
,
317 as
->euid
, as
->secid
);
319 snoop(&urb
->dev
->dev
, "urb complete\n");
320 snoop_urb(urb
, as
->userurb
);
324 static void destroy_async (struct dev_state
*ps
, struct list_head
*list
)
329 spin_lock_irqsave(&ps
->lock
, flags
);
330 while (!list_empty(list
)) {
331 as
= list_entry(list
->next
, struct async
, asynclist
);
332 list_del_init(&as
->asynclist
);
334 /* drop the spinlock so the completion handler can run */
335 spin_unlock_irqrestore(&ps
->lock
, flags
);
336 usb_kill_urb(as
->urb
);
337 spin_lock_irqsave(&ps
->lock
, flags
);
339 spin_unlock_irqrestore(&ps
->lock
, flags
);
340 as
= async_getcompleted(ps
);
343 as
= async_getcompleted(ps
);
347 static void destroy_async_on_interface (struct dev_state
*ps
, unsigned int ifnum
)
349 struct list_head
*p
, *q
, hitlist
;
352 INIT_LIST_HEAD(&hitlist
);
353 spin_lock_irqsave(&ps
->lock
, flags
);
354 list_for_each_safe(p
, q
, &ps
->async_pending
)
355 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
356 list_move_tail(p
, &hitlist
);
357 spin_unlock_irqrestore(&ps
->lock
, flags
);
358 destroy_async(ps
, &hitlist
);
361 static inline void destroy_all_async(struct dev_state
*ps
)
363 destroy_async(ps
, &ps
->async_pending
);
367 * interface claims are made only at the request of user level code,
368 * which can also release them (explicitly or by closing files).
369 * they're also undone when devices disconnect.
372 static int driver_probe (struct usb_interface
*intf
,
373 const struct usb_device_id
*id
)
378 static void driver_disconnect(struct usb_interface
*intf
)
380 struct dev_state
*ps
= usb_get_intfdata (intf
);
381 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
386 /* NOTE: this relies on usbcore having canceled and completed
387 * all pending I/O requests; 2.6 does that.
390 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
391 clear_bit(ifnum
, &ps
->ifclaimed
);
393 warn("interface number %u out of range", ifnum
);
395 usb_set_intfdata (intf
, NULL
);
397 /* force async requests to complete */
398 destroy_async_on_interface(ps
, ifnum
);
401 struct usb_driver usbfs_driver
= {
403 .probe
= driver_probe
,
404 .disconnect
= driver_disconnect
,
407 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
409 struct usb_device
*dev
= ps
->dev
;
410 struct usb_interface
*intf
;
413 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
415 /* already claimed */
416 if (test_bit(ifnum
, &ps
->ifclaimed
))
419 /* lock against other changes to driver bindings */
420 down_write(&usb_bus_type
.subsys
.rwsem
);
421 intf
= usb_ifnum_to_if(dev
, ifnum
);
425 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
426 up_write(&usb_bus_type
.subsys
.rwsem
);
428 set_bit(ifnum
, &ps
->ifclaimed
);
432 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
434 struct usb_device
*dev
;
435 struct usb_interface
*intf
;
439 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
442 /* lock against other changes to driver bindings */
443 down_write(&usb_bus_type
.subsys
.rwsem
);
444 intf
= usb_ifnum_to_if(dev
, ifnum
);
447 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
448 usb_driver_release_interface(&usbfs_driver
, intf
);
451 up_write(&usb_bus_type
.subsys
.rwsem
);
455 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
457 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
458 return -EHOSTUNREACH
;
459 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
461 if (test_bit(ifnum
, &ps
->ifclaimed
))
463 /* if not yet claimed, claim it for the driver */
464 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim interface %u before use\n",
465 current
->pid
, current
->comm
, ifnum
);
466 return claimintf(ps
, ifnum
);
469 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
471 unsigned int i
, j
, e
;
472 struct usb_interface
*intf
;
473 struct usb_host_interface
*alts
;
474 struct usb_endpoint_descriptor
*endpt
;
476 if (ep
& ~(USB_DIR_IN
|0xf))
480 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
481 intf
= dev
->actconfig
->interface
[i
];
482 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
483 alts
= &intf
->altsetting
[j
];
484 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
485 endpt
= &alts
->endpoint
[e
].desc
;
486 if (endpt
->bEndpointAddress
== ep
)
487 return alts
->desc
.bInterfaceNumber
;
494 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
, unsigned int index
)
498 if (ps
->dev
->state
!= USB_STATE_ADDRESS
499 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
500 return -EHOSTUNREACH
;
501 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
505 switch (requesttype
& USB_RECIP_MASK
) {
506 case USB_RECIP_ENDPOINT
:
507 if ((ret
= findintfep(ps
->dev
, index
)) >= 0)
508 ret
= checkintf(ps
, ret
);
511 case USB_RECIP_INTERFACE
:
512 ret
= checkintf(ps
, index
);
518 static struct usb_device
*usbdev_lookup_minor(int minor
)
520 struct device
*device
;
521 struct usb_device
*udev
= NULL
;
523 down(&usb_device_class
->sem
);
524 list_for_each_entry(device
, &usb_device_class
->devices
, node
) {
525 if (device
->devt
== MKDEV(USB_DEVICE_MAJOR
, minor
)) {
526 udev
= device
->platform_data
;
530 up(&usb_device_class
->sem
);
538 static int usbdev_open(struct inode
*inode
, struct file
*file
)
540 struct usb_device
*dev
= NULL
;
541 struct dev_state
*ps
;
545 * no locking necessary here, as chrdev_open has the kernel lock
546 * (still acquire the kernel lock for safety)
549 if (!(ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
)))
554 /* check if we are called from a real node or usbfs */
555 if (imajor(inode
) == USB_DEVICE_MAJOR
)
556 dev
= usbdev_lookup_minor(iminor(inode
));
558 dev
= inode
->u
.generic_ip
;
567 spin_lock_init(&ps
->lock
);
568 INIT_LIST_HEAD(&ps
->async_pending
);
569 INIT_LIST_HEAD(&ps
->async_completed
);
570 init_waitqueue_head(&ps
->wait
);
572 ps
->disc_pid
= current
->pid
;
573 ps
->disc_uid
= current
->uid
;
574 ps
->disc_euid
= current
->euid
;
575 ps
->disccontext
= NULL
;
577 security_task_getsecid(current
, &ps
->secid
);
579 list_add_tail(&ps
->list
, &dev
->filelist
);
580 file
->private_data
= ps
;
587 static int usbdev_release(struct inode
*inode
, struct file
*file
)
589 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
590 struct usb_device
*dev
= ps
->dev
;
593 usb_lock_device(dev
);
594 list_del_init(&ps
->list
);
595 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
597 if (test_bit(ifnum
, &ps
->ifclaimed
))
598 releaseintf(ps
, ifnum
);
600 destroy_all_async(ps
);
601 usb_unlock_device(dev
);
608 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
610 struct usb_device
*dev
= ps
->dev
;
611 struct usbdevfs_ctrltransfer ctrl
;
616 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
618 if ((ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
)))
620 if (ctrl
.wLength
> PAGE_SIZE
)
622 if (!(tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
)))
625 if (ctrl
.bRequestType
& 0x80) {
626 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
, ctrl
.wLength
)) {
627 free_page((unsigned long)tbuf
);
630 snoop(&dev
->dev
, "control read: bRequest=%02x "
631 "bRrequestType=%02x wValue=%04x "
632 "wIndex=%04x wLength=%04x\n",
633 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
634 ctrl
.wIndex
, ctrl
.wLength
);
636 usb_unlock_device(dev
);
637 i
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
638 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
639 usb_lock_device(dev
);
640 if ((i
> 0) && ctrl
.wLength
) {
642 dev_info(&dev
->dev
, "control read: data ");
643 for (j
= 0; j
< i
; ++j
)
644 printk("%02x ", (unsigned char)(tbuf
)[j
]);
647 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
648 free_page((unsigned long)tbuf
);
654 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
655 free_page((unsigned long)tbuf
);
659 snoop(&dev
->dev
, "control write: bRequest=%02x "
660 "bRrequestType=%02x wValue=%04x "
661 "wIndex=%04x wLength=%04x\n",
662 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
663 ctrl
.wIndex
, ctrl
.wLength
);
665 dev_info(&dev
->dev
, "control write: data: ");
666 for (j
= 0; j
< ctrl
.wLength
; ++j
)
667 printk("%02x ", (unsigned char)(tbuf
)[j
]);
670 usb_unlock_device(dev
);
671 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
672 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
673 usb_lock_device(dev
);
675 free_page((unsigned long)tbuf
);
676 if (i
<0 && i
!= -EPIPE
) {
677 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
678 "failed cmd %s rqt %u rq %u len %u ret %d\n",
679 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
685 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
687 struct usb_device
*dev
= ps
->dev
;
688 struct usbdevfs_bulktransfer bulk
;
689 unsigned int tmo
, len1
, pipe
;
694 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
696 if ((ret
= findintfep(ps
->dev
, bulk
.ep
)) < 0)
698 if ((ret
= checkintf(ps
, ret
)))
700 if (bulk
.ep
& USB_DIR_IN
)
701 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
703 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
704 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
707 if (len1
> MAX_USBFS_BUFFER_SIZE
)
709 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
712 if (bulk
.ep
& 0x80) {
713 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
717 snoop(&dev
->dev
, "bulk read: len=0x%02x timeout=%04d\n",
718 bulk
.len
, bulk
.timeout
);
719 usb_unlock_device(dev
);
720 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
721 usb_lock_device(dev
);
724 dev_info(&dev
->dev
, "bulk read: data ");
725 for (j
= 0; j
< len2
; ++j
)
726 printk("%02x ", (unsigned char)(tbuf
)[j
]);
729 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
736 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
741 snoop(&dev
->dev
, "bulk write: len=0x%02x timeout=%04d\n",
742 bulk
.len
, bulk
.timeout
);
744 dev_info(&dev
->dev
, "bulk write: data: ");
745 for (j
= 0; j
< len1
; ++j
)
746 printk("%02x ", (unsigned char)(tbuf
)[j
]);
749 usb_unlock_device(dev
);
750 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
751 usb_lock_device(dev
);
759 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
764 if (get_user(ep
, (unsigned int __user
*)arg
))
766 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
768 if ((ret
= checkintf(ps
, ret
)))
770 usb_settoggle(ps
->dev
, ep
& 0xf, !(ep
& USB_DIR_IN
), 0);
774 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
780 if (get_user(ep
, (unsigned int __user
*)arg
))
782 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
784 if ((ret
= checkintf(ps
, ret
)))
787 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
789 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
791 return usb_clear_halt(ps
->dev
, pipe
);
795 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
797 struct usbdevfs_getdriver gd
;
798 struct usb_interface
*intf
;
801 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
803 down_read(&usb_bus_type
.subsys
.rwsem
);
804 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
805 if (!intf
|| !intf
->dev
.driver
)
808 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
810 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
812 up_read(&usb_bus_type
.subsys
.rwsem
);
816 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
818 struct usbdevfs_connectinfo ci
;
820 ci
.devnum
= ps
->dev
->devnum
;
821 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
822 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
827 static int proc_resetdevice(struct dev_state
*ps
)
829 return usb_reset_composite_device(ps
->dev
, NULL
);
832 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
834 struct usbdevfs_setinterface setintf
;
837 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
839 if ((ret
= checkintf(ps
, setintf
.interface
)))
841 return usb_set_interface(ps
->dev
, setintf
.interface
,
845 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
849 struct usb_host_config
*actconfig
;
851 if (get_user(u
, (unsigned int __user
*)arg
))
854 actconfig
= ps
->dev
->actconfig
;
856 /* Don't touch the device if any interfaces are claimed.
857 * It could interfere with other drivers' operations, and if
858 * an interface is claimed by usbfs it could easily deadlock.
863 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
864 if (usb_interface_claimed(actconfig
->interface
[i
])) {
865 dev_warn (&ps
->dev
->dev
,
866 "usbfs: interface %d claimed by %s "
867 "while '%s' sets config #%d\n",
868 actconfig
->interface
[i
]
870 ->desc
.bInterfaceNumber
,
871 actconfig
->interface
[i
]
880 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
881 * so avoid usb_set_configuration()'s kick to sysfs
884 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
885 status
= usb_reset_configuration(ps
->dev
);
887 status
= usb_set_configuration(ps
->dev
, u
);
893 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
894 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
897 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
898 struct usb_host_endpoint
*ep
;
900 struct usb_ctrlrequest
*dr
= NULL
;
901 unsigned int u
, totlen
, isofrmlen
;
902 int ret
, interval
= 0, ifnum
= -1;
904 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|USBDEVFS_URB_SHORT_NOT_OK
|
905 URB_NO_FSBR
|URB_ZERO_PACKET
))
909 if (uurb
->signr
!= 0 && (uurb
->signr
< SIGRTMIN
|| uurb
->signr
> SIGRTMAX
))
911 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&& (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
912 if ((ifnum
= findintfep(ps
->dev
, uurb
->endpoint
)) < 0)
914 if ((ret
= checkintf(ps
, ifnum
)))
917 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0)
918 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
920 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
924 case USBDEVFS_URB_TYPE_CONTROL
:
925 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
926 != USB_ENDPOINT_XFER_CONTROL
)
928 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
929 if (uurb
->buffer_length
< 8 || uurb
->buffer_length
> (8 + MAX_USBFS_BUFFER_SIZE
))
931 if (!(dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
)))
933 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
937 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
941 if ((ret
= check_ctrlrecip(ps
, dr
->bRequestType
, le16_to_cpup(&dr
->wIndex
)))) {
945 uurb
->endpoint
= (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) | (dr
->bRequestType
& USB_ENDPOINT_DIR_MASK
);
946 uurb
->number_of_packets
= 0;
947 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
949 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
)) {
953 snoop(&ps
->dev
->dev
, "control urb\n");
956 case USBDEVFS_URB_TYPE_BULK
:
957 switch (ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) {
958 case USB_ENDPOINT_XFER_CONTROL
:
959 case USB_ENDPOINT_XFER_ISOC
:
961 /* allow single-shot interrupt transfers, at bogus rates */
963 uurb
->number_of_packets
= 0;
964 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
966 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
968 snoop(&ps
->dev
->dev
, "bulk urb\n");
971 case USBDEVFS_URB_TYPE_ISO
:
972 /* arbitrary limit */
973 if (uurb
->number_of_packets
< 1 || uurb
->number_of_packets
> 128)
975 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
976 != USB_ENDPOINT_XFER_ISOC
)
978 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
979 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) * uurb
->number_of_packets
;
980 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
982 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
986 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
987 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
988 if (isopkt
[u
].length
> 8192) {
992 totlen
+= isopkt
[u
].length
;
994 if (totlen
> 32768) {
998 uurb
->buffer_length
= totlen
;
999 snoop(&ps
->dev
->dev
, "iso urb\n");
1002 case USBDEVFS_URB_TYPE_INTERRUPT
:
1003 uurb
->number_of_packets
= 0;
1004 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
1005 != USB_ENDPOINT_XFER_INT
)
1007 if (ps
->dev
->speed
== USB_SPEED_HIGH
)
1008 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
1010 interval
= ep
->desc
.bInterval
;
1011 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1013 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
1015 snoop(&ps
->dev
->dev
, "interrupt urb\n");
1021 if (!(as
= alloc_async(uurb
->number_of_packets
))) {
1026 if (!(as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
, GFP_KERNEL
))) {
1032 as
->urb
->dev
= ps
->dev
;
1033 as
->urb
->pipe
= (uurb
->type
<< 30) | __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) | (uurb
->endpoint
& USB_DIR_IN
);
1034 as
->urb
->transfer_flags
= uurb
->flags
;
1035 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1036 as
->urb
->setup_packet
= (unsigned char*)dr
;
1037 as
->urb
->start_frame
= uurb
->start_frame
;
1038 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
1039 as
->urb
->interval
= interval
;
1040 as
->urb
->context
= as
;
1041 as
->urb
->complete
= async_completed
;
1042 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1043 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1044 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1045 totlen
+= isopkt
[u
].length
;
1050 if (uurb
->endpoint
& USB_DIR_IN
)
1051 as
->userbuffer
= uurb
->buffer
;
1053 as
->userbuffer
= NULL
;
1054 as
->signr
= uurb
->signr
;
1056 as
->pid
= current
->pid
;
1057 as
->uid
= current
->uid
;
1058 as
->euid
= current
->euid
;
1059 security_task_getsecid(current
, &as
->secid
);
1060 if (!(uurb
->endpoint
& USB_DIR_IN
)) {
1061 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
, as
->urb
->transfer_buffer_length
)) {
1066 snoop(&as
->urb
->dev
->dev
, "submit urb\n");
1067 snoop_urb(as
->urb
, as
->userurb
);
1068 async_newpending(as
);
1069 if ((ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
))) {
1070 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
, "usbfs: usb_submit_urb returned %d\n", ret
);
1071 async_removepending(as
);
1078 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1080 struct usbdevfs_urb uurb
;
1082 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1085 return proc_do_submiturb(ps
, &uurb
, (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
), arg
);
1088 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1092 as
= async_getpending(ps
, arg
);
1095 usb_kill_urb(as
->urb
);
1099 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1101 struct urb
*urb
= as
->urb
;
1102 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1103 void __user
*addr
= as
->userurb
;
1107 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1109 if (put_user(urb
->status
, &userurb
->status
))
1111 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1113 if (put_user(urb
->error_count
, &userurb
->error_count
))
1116 if (usb_pipeisoc(urb
->pipe
)) {
1117 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1118 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1119 &userurb
->iso_frame_desc
[i
].actual_length
))
1121 if (put_user(urb
->iso_frame_desc
[i
].status
,
1122 &userurb
->iso_frame_desc
[i
].status
))
1129 if (put_user(addr
, (void __user
* __user
*)arg
))
1134 static struct async
* reap_as(struct dev_state
*ps
)
1136 DECLARE_WAITQUEUE(wait
, current
);
1137 struct async
*as
= NULL
;
1138 struct usb_device
*dev
= ps
->dev
;
1140 add_wait_queue(&ps
->wait
, &wait
);
1142 __set_current_state(TASK_INTERRUPTIBLE
);
1143 if ((as
= async_getcompleted(ps
)))
1145 if (signal_pending(current
))
1147 usb_unlock_device(dev
);
1149 usb_lock_device(dev
);
1151 remove_wait_queue(&ps
->wait
, &wait
);
1152 set_current_state(TASK_RUNNING
);
1156 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1158 struct async
*as
= reap_as(ps
);
1160 return processcompl(as
, (void __user
* __user
*)arg
);
1161 if (signal_pending(current
))
1166 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1170 if (!(as
= async_getcompleted(ps
)))
1172 return processcompl(as
, (void __user
* __user
*)arg
);
1175 #ifdef CONFIG_COMPAT
1177 static int get_urb32(struct usbdevfs_urb
*kurb
,
1178 struct usbdevfs_urb32 __user
*uurb
)
1181 if (get_user(kurb
->type
, &uurb
->type
) ||
1182 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1183 __get_user(kurb
->status
, &uurb
->status
) ||
1184 __get_user(kurb
->flags
, &uurb
->flags
) ||
1185 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1186 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1187 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1188 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1189 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1190 __get_user(kurb
->signr
, &uurb
->signr
))
1193 if (__get_user(uptr
, &uurb
->buffer
))
1195 kurb
->buffer
= compat_ptr(uptr
);
1196 if (__get_user(uptr
, &uurb
->buffer
))
1198 kurb
->usercontext
= compat_ptr(uptr
);
1203 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1205 struct usbdevfs_urb uurb
;
1207 if (get_urb32(&uurb
,(struct usbdevfs_urb32
*)arg
))
1210 return proc_do_submiturb(ps
, &uurb
, ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
, arg
);
1213 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1215 struct urb
*urb
= as
->urb
;
1216 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1217 void __user
*addr
= as
->userurb
;
1221 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1223 if (put_user(urb
->status
, &userurb
->status
))
1225 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1227 if (put_user(urb
->error_count
, &userurb
->error_count
))
1230 if (usb_pipeisoc(urb
->pipe
)) {
1231 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1232 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1233 &userurb
->iso_frame_desc
[i
].actual_length
))
1235 if (put_user(urb
->iso_frame_desc
[i
].status
,
1236 &userurb
->iso_frame_desc
[i
].status
))
1242 if (put_user((u32
)(u64
)addr
, (u32 __user
*)arg
))
1247 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1249 struct async
*as
= reap_as(ps
);
1251 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1252 if (signal_pending(current
))
1257 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1261 if (!(as
= async_getcompleted(ps
)))
1263 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1268 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1270 struct usbdevfs_disconnectsignal ds
;
1272 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1274 if (ds
.signr
!= 0 && (ds
.signr
< SIGRTMIN
|| ds
.signr
> SIGRTMAX
))
1276 ps
->discsignr
= ds
.signr
;
1277 ps
->disccontext
= ds
.context
;
1281 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1285 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1287 return claimintf(ps
, ifnum
);
1290 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1295 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1297 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1299 destroy_async_on_interface (ps
, ifnum
);
1303 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1308 struct usb_interface
*intf
= NULL
;
1309 struct usb_driver
*driver
= NULL
;
1312 if ((size
= _IOC_SIZE (ctl
->ioctl_code
)) > 0) {
1313 if ((buf
= kmalloc (size
, GFP_KERNEL
)) == NULL
)
1315 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1316 if (copy_from_user (buf
, ctl
->data
, size
)) {
1321 memset (buf
, 0, size
);
1325 if (!connected(ps
->dev
)) {
1330 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1331 retval
= -EHOSTUNREACH
;
1332 else if (!(intf
= usb_ifnum_to_if (ps
->dev
, ctl
->ifno
)))
1334 else switch (ctl
->ioctl_code
) {
1336 /* disconnect kernel driver from interface */
1337 case USBDEVFS_DISCONNECT
:
1339 down_write(&usb_bus_type
.subsys
.rwsem
);
1340 if (intf
->dev
.driver
) {
1341 driver
= to_usb_driver(intf
->dev
.driver
);
1342 dev_dbg (&intf
->dev
, "disconnect by usbfs\n");
1343 usb_driver_release_interface(driver
, intf
);
1346 up_write(&usb_bus_type
.subsys
.rwsem
);
1349 /* let kernel drivers try to (re)bind to the interface */
1350 case USBDEVFS_CONNECT
:
1351 usb_unlock_device(ps
->dev
);
1352 bus_rescan_devices(intf
->dev
.bus
);
1353 usb_lock_device(ps
->dev
);
1356 /* talk directly to the interface's driver */
1358 down_read(&usb_bus_type
.subsys
.rwsem
);
1359 if (intf
->dev
.driver
)
1360 driver
= to_usb_driver(intf
->dev
.driver
);
1361 if (driver
== NULL
|| driver
->ioctl
== NULL
) {
1364 retval
= driver
->ioctl (intf
, ctl
->ioctl_code
, buf
);
1365 if (retval
== -ENOIOCTLCMD
)
1368 up_read(&usb_bus_type
.subsys
.rwsem
);
1371 /* cleanup and return */
1373 && (_IOC_DIR (ctl
->ioctl_code
) & _IOC_READ
) != 0
1375 && copy_to_user (ctl
->data
, buf
, size
) != 0)
1382 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1384 struct usbdevfs_ioctl ctrl
;
1386 if (copy_from_user(&ctrl
, arg
, sizeof (ctrl
)))
1388 return proc_ioctl(ps
, &ctrl
);
1391 #ifdef CONFIG_COMPAT
1392 static int proc_ioctl_compat(struct dev_state
*ps
, compat_uptr_t arg
)
1394 struct usbdevfs_ioctl32 __user
*uioc
;
1395 struct usbdevfs_ioctl ctrl
;
1398 uioc
= compat_ptr((long)arg
);
1399 if (get_user(ctrl
.ifno
, &uioc
->ifno
) ||
1400 get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
1401 __get_user(udata
, &uioc
->data
))
1403 ctrl
.data
= compat_ptr(udata
);
1405 return proc_ioctl(ps
, &ctrl
);
1410 * NOTE: All requests here that have interface numbers as parameters
1411 * are assuming that somehow the configuration has been prevented from
1412 * changing. But there's no mechanism to ensure that...
1414 static int usbdev_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1416 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1417 struct usb_device
*dev
= ps
->dev
;
1418 void __user
*p
= (void __user
*)arg
;
1421 if (!(file
->f_mode
& FMODE_WRITE
))
1423 usb_lock_device(dev
);
1424 if (!connected(dev
)) {
1425 usb_unlock_device(dev
);
1430 case USBDEVFS_CONTROL
:
1431 snoop(&dev
->dev
, "%s: CONTROL\n", __FUNCTION__
);
1432 ret
= proc_control(ps
, p
);
1434 inode
->i_mtime
= CURRENT_TIME
;
1438 snoop(&dev
->dev
, "%s: BULK\n", __FUNCTION__
);
1439 ret
= proc_bulk(ps
, p
);
1441 inode
->i_mtime
= CURRENT_TIME
;
1444 case USBDEVFS_RESETEP
:
1445 snoop(&dev
->dev
, "%s: RESETEP\n", __FUNCTION__
);
1446 ret
= proc_resetep(ps
, p
);
1448 inode
->i_mtime
= CURRENT_TIME
;
1451 case USBDEVFS_RESET
:
1452 snoop(&dev
->dev
, "%s: RESET\n", __FUNCTION__
);
1453 ret
= proc_resetdevice(ps
);
1456 case USBDEVFS_CLEAR_HALT
:
1457 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __FUNCTION__
);
1458 ret
= proc_clearhalt(ps
, p
);
1460 inode
->i_mtime
= CURRENT_TIME
;
1463 case USBDEVFS_GETDRIVER
:
1464 snoop(&dev
->dev
, "%s: GETDRIVER\n", __FUNCTION__
);
1465 ret
= proc_getdriver(ps
, p
);
1468 case USBDEVFS_CONNECTINFO
:
1469 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __FUNCTION__
);
1470 ret
= proc_connectinfo(ps
, p
);
1473 case USBDEVFS_SETINTERFACE
:
1474 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __FUNCTION__
);
1475 ret
= proc_setintf(ps
, p
);
1478 case USBDEVFS_SETCONFIGURATION
:
1479 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __FUNCTION__
);
1480 ret
= proc_setconfig(ps
, p
);
1483 case USBDEVFS_SUBMITURB
:
1484 snoop(&dev
->dev
, "%s: SUBMITURB\n", __FUNCTION__
);
1485 ret
= proc_submiturb(ps
, p
);
1487 inode
->i_mtime
= CURRENT_TIME
;
1490 #ifdef CONFIG_COMPAT
1492 case USBDEVFS_SUBMITURB32
:
1493 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __FUNCTION__
);
1494 ret
= proc_submiturb_compat(ps
, p
);
1496 inode
->i_mtime
= CURRENT_TIME
;
1499 case USBDEVFS_REAPURB32
:
1500 snoop(&dev
->dev
, "%s: REAPURB32\n", __FUNCTION__
);
1501 ret
= proc_reapurb_compat(ps
, p
);
1504 case USBDEVFS_REAPURBNDELAY32
:
1505 snoop(&dev
->dev
, "%s: REAPURBDELAY32\n", __FUNCTION__
);
1506 ret
= proc_reapurbnonblock_compat(ps
, p
);
1509 case USBDEVFS_IOCTL32
:
1510 snoop(&dev
->dev
, "%s: IOCTL\n", __FUNCTION__
);
1511 ret
= proc_ioctl_compat(ps
, (compat_uptr_t
)(long)p
);
1515 case USBDEVFS_DISCARDURB
:
1516 snoop(&dev
->dev
, "%s: DISCARDURB\n", __FUNCTION__
);
1517 ret
= proc_unlinkurb(ps
, p
);
1520 case USBDEVFS_REAPURB
:
1521 snoop(&dev
->dev
, "%s: REAPURB\n", __FUNCTION__
);
1522 ret
= proc_reapurb(ps
, p
);
1525 case USBDEVFS_REAPURBNDELAY
:
1526 snoop(&dev
->dev
, "%s: REAPURBDELAY\n", __FUNCTION__
);
1527 ret
= proc_reapurbnonblock(ps
, p
);
1530 case USBDEVFS_DISCSIGNAL
:
1531 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __FUNCTION__
);
1532 ret
= proc_disconnectsignal(ps
, p
);
1535 case USBDEVFS_CLAIMINTERFACE
:
1536 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __FUNCTION__
);
1537 ret
= proc_claiminterface(ps
, p
);
1540 case USBDEVFS_RELEASEINTERFACE
:
1541 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __FUNCTION__
);
1542 ret
= proc_releaseinterface(ps
, p
);
1545 case USBDEVFS_IOCTL
:
1546 snoop(&dev
->dev
, "%s: IOCTL\n", __FUNCTION__
);
1547 ret
= proc_ioctl_default(ps
, p
);
1550 usb_unlock_device(dev
);
1552 inode
->i_atime
= CURRENT_TIME
;
1556 /* No kernel lock - fine */
1557 static unsigned int usbdev_poll(struct file
*file
, struct poll_table_struct
*wait
)
1559 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1560 unsigned int mask
= 0;
1562 poll_wait(file
, &ps
->wait
, wait
);
1563 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1564 mask
|= POLLOUT
| POLLWRNORM
;
1565 if (!connected(ps
->dev
))
1566 mask
|= POLLERR
| POLLHUP
;
1570 struct file_operations usbfs_device_file_operations
= {
1571 .llseek
= usbdev_lseek
,
1572 .read
= usbdev_read
,
1573 .poll
= usbdev_poll
,
1574 .ioctl
= usbdev_ioctl
,
1575 .open
= usbdev_open
,
1576 .release
= usbdev_release
,
1579 static void usbdev_add(struct usb_device
*dev
)
1581 int minor
= ((dev
->bus
->busnum
-1) * 128) + (dev
->devnum
-1);
1583 dev
->usbfs_dev
= device_create(usb_device_class
, &dev
->dev
,
1584 MKDEV(USB_DEVICE_MAJOR
, minor
),
1585 "usbdev%d.%d", dev
->bus
->busnum
, dev
->devnum
);
1587 dev
->usbfs_dev
->platform_data
= dev
;
1590 static void usbdev_remove(struct usb_device
*dev
)
1592 device_unregister(dev
->usbfs_dev
);
1595 static int usbdev_notify(struct notifier_block
*self
, unsigned long action
,
1599 case USB_DEVICE_ADD
:
1602 case USB_DEVICE_REMOVE
:
1609 static struct notifier_block usbdev_nb
= {
1610 .notifier_call
= usbdev_notify
,
1613 static struct cdev usb_device_cdev
= {
1614 .kobj
= {.name
= "usb_device", },
1615 .owner
= THIS_MODULE
,
1618 int __init
usbdev_init(void)
1622 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
1625 err("unable to register minors for usb_device");
1628 cdev_init(&usb_device_cdev
, &usbfs_device_file_operations
);
1629 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1631 err("unable to get usb_device major %d", USB_DEVICE_MAJOR
);
1634 usb_device_class
= class_create(THIS_MODULE
, "usb_device");
1635 if (IS_ERR(usb_device_class
)) {
1636 err("unable to register usb_device class");
1637 retval
= PTR_ERR(usb_device_class
);
1641 usb_register_notify(&usbdev_nb
);
1647 usb_device_class
= NULL
;
1648 cdev_del(&usb_device_cdev
);
1651 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1655 void usbdev_cleanup(void)
1657 usb_unregister_notify(&usbdev_nb
);
1658 class_destroy(usb_device_class
);
1659 cdev_del(&usb_device_cdev
);
1660 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);