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
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/smp_lock.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <asm/uaccess.h>
47 #include <asm/byteorder.h>
48 #include <linux/moduleparam.h>
50 #include "hcd.h" /* for usbcore internals */
54 struct list_head asynclist
;
56 struct task_struct
*task
;
59 void __user
*userbuffer
;
64 static int usbfs_snoop
= 0;
65 module_param (usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
66 MODULE_PARM_DESC (usbfs_snoop
, "true to log all usbfs traffic");
68 #define snoop(dev, format, arg...) \
71 dev_info( dev , format , ## arg); \
75 #define MAX_USBFS_BUFFER_SIZE 16384
77 static inline int connected (struct usb_device
*dev
)
79 return dev
->state
!= USB_STATE_NOTATTACHED
;
82 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
94 file
->f_pos
+= offset
;
106 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
, loff_t
*ppos
)
108 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
109 struct usb_device
*dev
= ps
->dev
;
116 usb_lock_device(dev
);
117 if (!connected(dev
)) {
120 } else if (pos
< 0) {
125 if (pos
< sizeof(struct usb_device_descriptor
)) {
126 struct usb_device_descriptor
*desc
= kmalloc(sizeof(*desc
), GFP_KERNEL
);
131 memcpy(desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
132 le16_to_cpus(&desc
->bcdUSB
);
133 le16_to_cpus(&desc
->idVendor
);
134 le16_to_cpus(&desc
->idProduct
);
135 le16_to_cpus(&desc
->bcdDevice
);
137 len
= sizeof(struct usb_device_descriptor
) - pos
;
140 if (copy_to_user(buf
, ((char *)desc
) + pos
, len
)) {
153 pos
= sizeof(struct usb_device_descriptor
);
154 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
155 struct usb_config_descriptor
*config
=
156 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
157 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
159 if (*ppos
< pos
+ length
) {
161 /* The descriptor may claim to be longer than it
162 * really is. Here is the actual allocated length. */
164 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
166 len
= length
- (*ppos
- pos
);
170 /* Simply don't write (skip over) unallocated parts */
171 if (alloclen
> (*ppos
- pos
)) {
172 alloclen
-= (*ppos
- pos
);
173 if (copy_to_user(buf
,
174 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
175 min(len
, alloclen
))) {
191 usb_unlock_device(dev
);
196 * async list handling
199 static struct async
*alloc_async(unsigned int numisoframes
)
201 unsigned int assize
= sizeof(struct async
) + numisoframes
* sizeof(struct usb_iso_packet_descriptor
);
202 struct async
*as
= kmalloc(assize
, GFP_KERNEL
);
205 memset(as
, 0, assize
);
206 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
214 static void free_async(struct async
*as
)
216 if (as
->urb
->transfer_buffer
)
217 kfree(as
->urb
->transfer_buffer
);
218 if (as
->urb
->setup_packet
)
219 kfree(as
->urb
->setup_packet
);
220 usb_free_urb(as
->urb
);
224 static inline void async_newpending(struct async
*as
)
226 struct dev_state
*ps
= as
->ps
;
229 spin_lock_irqsave(&ps
->lock
, flags
);
230 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
231 spin_unlock_irqrestore(&ps
->lock
, flags
);
234 static inline void async_removepending(struct async
*as
)
236 struct dev_state
*ps
= as
->ps
;
239 spin_lock_irqsave(&ps
->lock
, flags
);
240 list_del_init(&as
->asynclist
);
241 spin_unlock_irqrestore(&ps
->lock
, flags
);
244 static inline struct async
*async_getcompleted(struct dev_state
*ps
)
247 struct async
*as
= NULL
;
249 spin_lock_irqsave(&ps
->lock
, flags
);
250 if (!list_empty(&ps
->async_completed
)) {
251 as
= list_entry(ps
->async_completed
.next
, struct async
, asynclist
);
252 list_del_init(&as
->asynclist
);
254 spin_unlock_irqrestore(&ps
->lock
, flags
);
258 static inline struct async
*async_getpending(struct dev_state
*ps
, void __user
*userurb
)
263 spin_lock_irqsave(&ps
->lock
, flags
);
264 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
265 if (as
->userurb
== userurb
) {
266 list_del_init(&as
->asynclist
);
267 spin_unlock_irqrestore(&ps
->lock
, flags
);
270 spin_unlock_irqrestore(&ps
->lock
, flags
);
274 static void async_completed(struct urb
*urb
, struct pt_regs
*regs
)
276 struct async
*as
= (struct async
*)urb
->context
;
277 struct dev_state
*ps
= as
->ps
;
278 struct siginfo sinfo
;
280 spin_lock(&ps
->lock
);
281 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
282 spin_unlock(&ps
->lock
);
284 sinfo
.si_signo
= as
->signr
;
285 sinfo
.si_errno
= as
->urb
->status
;
286 sinfo
.si_code
= SI_ASYNCIO
;
287 sinfo
.si_addr
= as
->userurb
;
288 send_sig_info(as
->signr
, &sinfo
, as
->task
);
293 static void destroy_async (struct dev_state
*ps
, struct list_head
*list
)
298 spin_lock_irqsave(&ps
->lock
, flags
);
299 while (!list_empty(list
)) {
300 as
= list_entry(list
->next
, struct async
, asynclist
);
301 list_del_init(&as
->asynclist
);
303 /* drop the spinlock so the completion handler can run */
304 spin_unlock_irqrestore(&ps
->lock
, flags
);
305 usb_kill_urb(as
->urb
);
306 spin_lock_irqsave(&ps
->lock
, flags
);
308 spin_unlock_irqrestore(&ps
->lock
, flags
);
309 as
= async_getcompleted(ps
);
312 as
= async_getcompleted(ps
);
316 static void destroy_async_on_interface (struct dev_state
*ps
, unsigned int ifnum
)
318 struct list_head
*p
, *q
, hitlist
;
321 INIT_LIST_HEAD(&hitlist
);
322 spin_lock_irqsave(&ps
->lock
, flags
);
323 list_for_each_safe(p
, q
, &ps
->async_pending
)
324 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
325 list_move_tail(p
, &hitlist
);
326 spin_unlock_irqrestore(&ps
->lock
, flags
);
327 destroy_async(ps
, &hitlist
);
330 static inline void destroy_all_async(struct dev_state
*ps
)
332 destroy_async(ps
, &ps
->async_pending
);
336 * interface claims are made only at the request of user level code,
337 * which can also release them (explicitly or by closing files).
338 * they're also undone when devices disconnect.
341 static int driver_probe (struct usb_interface
*intf
,
342 const struct usb_device_id
*id
)
347 static void driver_disconnect(struct usb_interface
*intf
)
349 struct dev_state
*ps
= usb_get_intfdata (intf
);
350 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
355 /* NOTE: this relies on usbcore having canceled and completed
356 * all pending I/O requests; 2.6 does that.
359 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
360 clear_bit(ifnum
, &ps
->ifclaimed
);
362 warn("interface number %u out of range", ifnum
);
364 usb_set_intfdata (intf
, NULL
);
366 /* force async requests to complete */
367 destroy_async_on_interface(ps
, ifnum
);
370 struct usb_driver usbfs_driver
= {
371 .owner
= THIS_MODULE
,
373 .probe
= driver_probe
,
374 .disconnect
= driver_disconnect
,
377 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
379 struct usb_device
*dev
= ps
->dev
;
380 struct usb_interface
*intf
;
383 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
385 /* already claimed */
386 if (test_bit(ifnum
, &ps
->ifclaimed
))
389 /* lock against other changes to driver bindings */
390 down_write(&usb_bus_type
.subsys
.rwsem
);
391 intf
= usb_ifnum_to_if(dev
, ifnum
);
395 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
396 up_write(&usb_bus_type
.subsys
.rwsem
);
398 set_bit(ifnum
, &ps
->ifclaimed
);
402 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
404 struct usb_device
*dev
;
405 struct usb_interface
*intf
;
409 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
412 /* lock against other changes to driver bindings */
413 down_write(&usb_bus_type
.subsys
.rwsem
);
414 intf
= usb_ifnum_to_if(dev
, ifnum
);
417 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
418 usb_driver_release_interface(&usbfs_driver
, intf
);
421 up_write(&usb_bus_type
.subsys
.rwsem
);
425 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
427 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
428 return -EHOSTUNREACH
;
429 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
431 if (test_bit(ifnum
, &ps
->ifclaimed
))
433 /* if not yet claimed, claim it for the driver */
434 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim interface %u before use\n",
435 current
->pid
, current
->comm
, ifnum
);
436 return claimintf(ps
, ifnum
);
439 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
441 unsigned int i
, j
, e
;
442 struct usb_interface
*intf
;
443 struct usb_host_interface
*alts
;
444 struct usb_endpoint_descriptor
*endpt
;
446 if (ep
& ~(USB_DIR_IN
|0xf))
450 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
451 intf
= dev
->actconfig
->interface
[i
];
452 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
453 alts
= &intf
->altsetting
[j
];
454 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
455 endpt
= &alts
->endpoint
[e
].desc
;
456 if (endpt
->bEndpointAddress
== ep
)
457 return alts
->desc
.bInterfaceNumber
;
464 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
, unsigned int index
)
468 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
469 return -EHOSTUNREACH
;
470 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
474 switch (requesttype
& USB_RECIP_MASK
) {
475 case USB_RECIP_ENDPOINT
:
476 if ((ret
= findintfep(ps
->dev
, index
)) >= 0)
477 ret
= checkintf(ps
, ret
);
480 case USB_RECIP_INTERFACE
:
481 ret
= checkintf(ps
, index
);
490 static int usbdev_open(struct inode
*inode
, struct file
*file
)
492 struct usb_device
*dev
;
493 struct dev_state
*ps
;
497 * no locking necessary here, as chrdev_open has the kernel lock
498 * (still acquire the kernel lock for safety)
501 if (!(ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
)))
506 dev
= usb_get_dev(inode
->u
.generic_ip
);
514 spin_lock_init(&ps
->lock
);
515 INIT_LIST_HEAD(&ps
->async_pending
);
516 INIT_LIST_HEAD(&ps
->async_completed
);
517 init_waitqueue_head(&ps
->wait
);
519 ps
->disctask
= current
;
520 ps
->disccontext
= NULL
;
523 list_add_tail(&ps
->list
, &dev
->filelist
);
524 file
->private_data
= ps
;
531 static int usbdev_release(struct inode
*inode
, struct file
*file
)
533 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
534 struct usb_device
*dev
= ps
->dev
;
537 usb_lock_device(dev
);
538 list_del_init(&ps
->list
);
539 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
541 if (test_bit(ifnum
, &ps
->ifclaimed
))
542 releaseintf(ps
, ifnum
);
544 destroy_all_async(ps
);
545 usb_unlock_device(dev
);
552 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
554 struct usb_device
*dev
= ps
->dev
;
555 struct usbdevfs_ctrltransfer ctrl
;
560 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
562 if ((ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
)))
564 if (ctrl
.wLength
> PAGE_SIZE
)
566 if (!(tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
)))
569 if (ctrl
.bRequestType
& 0x80) {
570 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
, ctrl
.wLength
)) {
571 free_page((unsigned long)tbuf
);
574 snoop(&dev
->dev
, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
575 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
);
577 usb_unlock_device(dev
);
578 i
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
579 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
580 usb_lock_device(dev
);
581 if ((i
> 0) && ctrl
.wLength
) {
583 dev_info(&dev
->dev
, "control read: data ");
584 for (j
= 0; j
< ctrl
.wLength
; ++j
)
585 printk ("%02x ", (unsigned char)(tbuf
)[j
]);
588 if (copy_to_user(ctrl
.data
, tbuf
, ctrl
.wLength
)) {
589 free_page((unsigned long)tbuf
);
595 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
596 free_page((unsigned long)tbuf
);
600 snoop(&dev
->dev
, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
601 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
);
603 dev_info(&dev
->dev
, "control write: data: ");
604 for (j
= 0; j
< ctrl
.wLength
; ++j
)
605 printk ("%02x ", (unsigned char)(tbuf
)[j
]);
608 usb_unlock_device(dev
);
609 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
, ctrl
.bRequestType
,
610 ctrl
.wValue
, ctrl
.wIndex
, tbuf
, ctrl
.wLength
, tmo
);
611 usb_lock_device(dev
);
613 free_page((unsigned long)tbuf
);
614 if (i
<0 && i
!= -EPIPE
) {
615 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
616 "failed cmd %s rqt %u rq %u len %u ret %d\n",
617 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
623 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
625 struct usb_device
*dev
= ps
->dev
;
626 struct usbdevfs_bulktransfer bulk
;
627 unsigned int tmo
, len1
, pipe
;
632 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
634 if ((ret
= findintfep(ps
->dev
, bulk
.ep
)) < 0)
636 if ((ret
= checkintf(ps
, ret
)))
638 if (bulk
.ep
& USB_DIR_IN
)
639 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
641 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
642 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
645 if (len1
> MAX_USBFS_BUFFER_SIZE
)
647 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
650 if (bulk
.ep
& 0x80) {
651 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
655 usb_unlock_device(dev
);
656 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
657 usb_lock_device(dev
);
659 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
666 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
671 usb_unlock_device(dev
);
672 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
673 usb_lock_device(dev
);
681 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
686 if (get_user(ep
, (unsigned int __user
*)arg
))
688 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
690 if ((ret
= checkintf(ps
, ret
)))
692 usb_settoggle(ps
->dev
, ep
& 0xf, !(ep
& USB_DIR_IN
), 0);
696 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
702 if (get_user(ep
, (unsigned int __user
*)arg
))
704 if ((ret
= findintfep(ps
->dev
, ep
)) < 0)
706 if ((ret
= checkintf(ps
, ret
)))
709 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
711 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
713 return usb_clear_halt(ps
->dev
, pipe
);
717 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
719 struct usbdevfs_getdriver gd
;
720 struct usb_interface
*intf
;
723 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
725 down_read(&usb_bus_type
.subsys
.rwsem
);
726 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
727 if (!intf
|| !intf
->dev
.driver
)
730 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
732 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
734 up_read(&usb_bus_type
.subsys
.rwsem
);
738 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
740 struct usbdevfs_connectinfo ci
;
742 ci
.devnum
= ps
->dev
->devnum
;
743 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
744 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
749 static int proc_resetdevice(struct dev_state
*ps
)
751 return usb_reset_device(ps
->dev
);
755 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
757 struct usbdevfs_setinterface setintf
;
760 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
762 if ((ret
= checkintf(ps
, setintf
.interface
)))
764 return usb_set_interface(ps
->dev
, setintf
.interface
,
768 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
772 struct usb_host_config
*actconfig
;
774 if (get_user(u
, (unsigned int __user
*)arg
))
777 actconfig
= ps
->dev
->actconfig
;
779 /* Don't touch the device if any interfaces are claimed.
780 * It could interfere with other drivers' operations, and if
781 * an interface is claimed by usbfs it could easily deadlock.
786 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
787 if (usb_interface_claimed(actconfig
->interface
[i
])) {
788 dev_warn (&ps
->dev
->dev
,
789 "usbfs: interface %d claimed "
790 "while '%s' sets config #%d\n",
791 actconfig
->interface
[i
]
793 ->desc
.bInterfaceNumber
,
795 #if 0 /* FIXME: enable in 2.6.10 or so */
803 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
804 * so avoid usb_set_configuration()'s kick to sysfs
807 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
808 status
= usb_reset_configuration(ps
->dev
);
810 status
= usb_set_configuration(ps
->dev
, u
);
817 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
818 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
821 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
822 struct usb_host_endpoint
*ep
;
824 struct usb_ctrlrequest
*dr
= NULL
;
825 unsigned int u
, totlen
, isofrmlen
;
826 int ret
, interval
= 0, ifnum
= -1;
828 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|USBDEVFS_URB_SHORT_NOT_OK
|
829 URB_NO_FSBR
|URB_ZERO_PACKET
))
833 if (uurb
->signr
!= 0 && (uurb
->signr
< SIGRTMIN
|| uurb
->signr
> SIGRTMAX
))
835 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&& (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
836 if ((ifnum
= findintfep(ps
->dev
, uurb
->endpoint
)) < 0)
838 if ((ret
= checkintf(ps
, ifnum
)))
841 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0)
842 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
844 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
848 case USBDEVFS_URB_TYPE_CONTROL
:
849 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
850 != USB_ENDPOINT_XFER_CONTROL
)
852 /* min 8 byte setup packet, max arbitrary */
853 if (uurb
->buffer_length
< 8 || uurb
->buffer_length
> PAGE_SIZE
)
855 if (!(dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
)))
857 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
861 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
865 if ((ret
= check_ctrlrecip(ps
, dr
->bRequestType
, le16_to_cpup(&dr
->wIndex
)))) {
869 uurb
->endpoint
= (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) | (dr
->bRequestType
& USB_ENDPOINT_DIR_MASK
);
870 uurb
->number_of_packets
= 0;
871 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
873 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
)) {
879 case USBDEVFS_URB_TYPE_BULK
:
880 switch (ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
) {
881 case USB_ENDPOINT_XFER_CONTROL
:
882 case USB_ENDPOINT_XFER_ISOC
:
884 /* allow single-shot interrupt transfers, at bogus rates */
886 uurb
->number_of_packets
= 0;
887 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
889 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
893 case USBDEVFS_URB_TYPE_ISO
:
894 /* arbitrary limit */
895 if (uurb
->number_of_packets
< 1 || uurb
->number_of_packets
> 128)
897 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
898 != USB_ENDPOINT_XFER_ISOC
)
900 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
901 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) * uurb
->number_of_packets
;
902 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
904 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
908 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
909 if (isopkt
[u
].length
> 1023) {
913 totlen
+= isopkt
[u
].length
;
915 if (totlen
> 32768) {
919 uurb
->buffer_length
= totlen
;
922 case USBDEVFS_URB_TYPE_INTERRUPT
:
923 uurb
->number_of_packets
= 0;
924 if ((ep
->desc
.bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
925 != USB_ENDPOINT_XFER_INT
)
927 if (ps
->dev
->speed
== USB_SPEED_HIGH
)
928 interval
= 1 << min (15, ep
->desc
.bInterval
- 1);
930 interval
= ep
->desc
.bInterval
;
931 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
933 if (!access_ok((uurb
->endpoint
& USB_DIR_IN
) ? VERIFY_WRITE
: VERIFY_READ
, uurb
->buffer
, uurb
->buffer_length
))
940 if (!(as
= alloc_async(uurb
->number_of_packets
))) {
947 if (!(as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
, GFP_KERNEL
))) {
955 as
->urb
->dev
= ps
->dev
;
956 as
->urb
->pipe
= (uurb
->type
<< 30) | __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) | (uurb
->endpoint
& USB_DIR_IN
);
957 as
->urb
->transfer_flags
= uurb
->flags
;
958 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
959 as
->urb
->setup_packet
= (unsigned char*)dr
;
960 as
->urb
->start_frame
= uurb
->start_frame
;
961 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
962 as
->urb
->interval
= interval
;
963 as
->urb
->context
= as
;
964 as
->urb
->complete
= async_completed
;
965 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
966 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
967 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
968 totlen
+= isopkt
[u
].length
;
974 if (uurb
->endpoint
& USB_DIR_IN
)
975 as
->userbuffer
= uurb
->buffer
;
977 as
->userbuffer
= NULL
;
978 as
->signr
= uurb
->signr
;
981 if (!(uurb
->endpoint
& USB_DIR_IN
)) {
982 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
, as
->urb
->transfer_buffer_length
)) {
987 async_newpending(as
);
988 if ((ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
))) {
989 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
, "usbfs: usb_submit_urb returned %d\n", ret
);
990 async_removepending(as
);
997 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
999 struct usbdevfs_urb uurb
;
1001 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1004 return proc_do_submiturb(ps
, &uurb
, (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
), arg
);
1007 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1011 as
= async_getpending(ps
, arg
);
1014 usb_kill_urb(as
->urb
);
1018 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1020 struct urb
*urb
= as
->urb
;
1021 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1022 void __user
*addr
= as
->userurb
;
1026 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1028 if (put_user(urb
->status
, &userurb
->status
))
1030 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1032 if (put_user(urb
->error_count
, &userurb
->error_count
))
1035 if (!(usb_pipeisoc(urb
->pipe
)))
1037 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1038 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1039 &userurb
->iso_frame_desc
[i
].actual_length
))
1041 if (put_user(urb
->iso_frame_desc
[i
].status
,
1042 &userurb
->iso_frame_desc
[i
].status
))
1048 if (put_user(addr
, (void __user
* __user
*)arg
))
1053 static struct async
* reap_as(struct dev_state
*ps
)
1055 DECLARE_WAITQUEUE(wait
, current
);
1056 struct async
*as
= NULL
;
1057 struct usb_device
*dev
= ps
->dev
;
1059 add_wait_queue(&ps
->wait
, &wait
);
1061 __set_current_state(TASK_INTERRUPTIBLE
);
1062 if ((as
= async_getcompleted(ps
)))
1064 if (signal_pending(current
))
1066 usb_unlock_device(dev
);
1068 usb_lock_device(dev
);
1070 remove_wait_queue(&ps
->wait
, &wait
);
1071 set_current_state(TASK_RUNNING
);
1075 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1077 struct async
*as
= reap_as(ps
);
1079 return processcompl(as
, (void __user
* __user
*)arg
);
1080 if (signal_pending(current
))
1085 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1089 if (!(as
= async_getcompleted(ps
)))
1091 return processcompl(as
, (void __user
* __user
*)arg
);
1094 #ifdef CONFIG_COMPAT
1096 static int get_urb32(struct usbdevfs_urb
*kurb
,
1097 struct usbdevfs_urb32 __user
*uurb
)
1100 if (get_user(kurb
->type
, &uurb
->type
) ||
1101 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1102 __get_user(kurb
->status
, &uurb
->status
) ||
1103 __get_user(kurb
->flags
, &uurb
->flags
) ||
1104 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1105 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1106 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1107 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1108 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1109 __get_user(kurb
->signr
, &uurb
->signr
))
1112 if (__get_user(uptr
, &uurb
->buffer
))
1114 kurb
->buffer
= compat_ptr(uptr
);
1115 if (__get_user(uptr
, &uurb
->buffer
))
1117 kurb
->usercontext
= compat_ptr(uptr
);
1122 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1124 struct usbdevfs_urb uurb
;
1126 if (get_urb32(&uurb
,(struct usbdevfs_urb32
*)arg
))
1129 return proc_do_submiturb(ps
, &uurb
, ((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
, arg
);
1132 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1134 struct urb
*urb
= as
->urb
;
1135 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1136 void __user
*addr
= as
->userurb
;
1140 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, urb
->transfer_buffer_length
))
1142 if (put_user(urb
->status
, &userurb
->status
))
1144 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1146 if (put_user(urb
->error_count
, &userurb
->error_count
))
1149 if (!(usb_pipeisoc(urb
->pipe
)))
1151 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1152 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1153 &userurb
->iso_frame_desc
[i
].actual_length
))
1155 if (put_user(urb
->iso_frame_desc
[i
].status
,
1156 &userurb
->iso_frame_desc
[i
].status
))
1161 if (put_user((u32
)(u64
)addr
, (u32 __user
*)arg
))
1166 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1168 struct async
*as
= reap_as(ps
);
1170 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1171 if (signal_pending(current
))
1176 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1180 printk("reapurbnblock\n");
1181 if (!(as
= async_getcompleted(ps
)))
1183 printk("reap got as %p\n", as
);
1184 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1189 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1191 struct usbdevfs_disconnectsignal ds
;
1193 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1195 if (ds
.signr
!= 0 && (ds
.signr
< SIGRTMIN
|| ds
.signr
> SIGRTMAX
))
1197 ps
->discsignr
= ds
.signr
;
1198 ps
->disccontext
= ds
.context
;
1202 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1206 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1208 return claimintf(ps
, ifnum
);
1211 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1216 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1218 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1220 destroy_async_on_interface (ps
, ifnum
);
1224 static int proc_ioctl (struct dev_state
*ps
, void __user
*arg
)
1226 struct usbdevfs_ioctl ctrl
;
1230 struct usb_interface
*intf
= NULL
;
1231 struct usb_driver
*driver
= NULL
;
1234 /* get input parameters and alloc buffer */
1235 if (copy_from_user(&ctrl
, arg
, sizeof (ctrl
)))
1237 if ((size
= _IOC_SIZE (ctrl
.ioctl_code
)) > 0) {
1238 if ((buf
= kmalloc (size
, GFP_KERNEL
)) == NULL
)
1240 if ((_IOC_DIR(ctrl
.ioctl_code
) & _IOC_WRITE
)) {
1241 if (copy_from_user (buf
, ctrl
.data
, size
)) {
1246 memset (buf
, 0, size
);
1250 if (!connected(ps
->dev
)) {
1256 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1257 retval
= -EHOSTUNREACH
;
1258 else if (!(intf
= usb_ifnum_to_if (ps
->dev
, ctrl
.ifno
)))
1260 else switch (ctrl
.ioctl_code
) {
1262 /* disconnect kernel driver from interface */
1263 case USBDEVFS_DISCONNECT
:
1265 /* don't allow the user to unbind the hub driver from
1266 * a hub with children to manage */
1267 for (i
= 0; i
< ps
->dev
->maxchild
; ++i
) {
1268 if (ps
->dev
->children
[i
])
1274 down_write(&usb_bus_type
.subsys
.rwsem
);
1275 if (intf
->dev
.driver
) {
1276 driver
= to_usb_driver(intf
->dev
.driver
);
1277 dev_dbg (&intf
->dev
, "disconnect by usbfs\n");
1278 usb_driver_release_interface(driver
, intf
);
1281 up_write(&usb_bus_type
.subsys
.rwsem
);
1284 /* let kernel drivers try to (re)bind to the interface */
1285 case USBDEVFS_CONNECT
:
1286 usb_unlock_device(ps
->dev
);
1287 usb_lock_all_devices();
1288 bus_rescan_devices(intf
->dev
.bus
);
1289 usb_unlock_all_devices();
1290 usb_lock_device(ps
->dev
);
1293 /* talk directly to the interface's driver */
1295 down_read(&usb_bus_type
.subsys
.rwsem
);
1296 if (intf
->dev
.driver
)
1297 driver
= to_usb_driver(intf
->dev
.driver
);
1298 if (driver
== NULL
|| driver
->ioctl
== NULL
) {
1301 retval
= driver
->ioctl (intf
, ctrl
.ioctl_code
, buf
);
1302 if (retval
== -ENOIOCTLCMD
)
1305 up_read(&usb_bus_type
.subsys
.rwsem
);
1308 /* cleanup and return */
1310 && (_IOC_DIR (ctrl
.ioctl_code
) & _IOC_READ
) != 0
1312 && copy_to_user (ctrl
.data
, buf
, size
) != 0)
1320 * NOTE: All requests here that have interface numbers as parameters
1321 * are assuming that somehow the configuration has been prevented from
1322 * changing. But there's no mechanism to ensure that...
1324 static int usbdev_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1326 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1327 struct usb_device
*dev
= ps
->dev
;
1328 void __user
*p
= (void __user
*)arg
;
1331 if (!(file
->f_mode
& FMODE_WRITE
))
1333 usb_lock_device(dev
);
1334 if (!connected(dev
)) {
1335 usb_unlock_device(dev
);
1340 case USBDEVFS_CONTROL
:
1341 snoop(&dev
->dev
, "%s: CONTROL\n", __FUNCTION__
);
1342 ret
= proc_control(ps
, p
);
1344 inode
->i_mtime
= CURRENT_TIME
;
1348 snoop(&dev
->dev
, "%s: BULK\n", __FUNCTION__
);
1349 ret
= proc_bulk(ps
, p
);
1351 inode
->i_mtime
= CURRENT_TIME
;
1354 case USBDEVFS_RESETEP
:
1355 snoop(&dev
->dev
, "%s: RESETEP\n", __FUNCTION__
);
1356 ret
= proc_resetep(ps
, p
);
1358 inode
->i_mtime
= CURRENT_TIME
;
1361 case USBDEVFS_RESET
:
1362 snoop(&dev
->dev
, "%s: RESET\n", __FUNCTION__
);
1363 ret
= proc_resetdevice(ps
);
1366 case USBDEVFS_CLEAR_HALT
:
1367 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __FUNCTION__
);
1368 ret
= proc_clearhalt(ps
, p
);
1370 inode
->i_mtime
= CURRENT_TIME
;
1373 case USBDEVFS_GETDRIVER
:
1374 snoop(&dev
->dev
, "%s: GETDRIVER\n", __FUNCTION__
);
1375 ret
= proc_getdriver(ps
, p
);
1378 case USBDEVFS_CONNECTINFO
:
1379 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __FUNCTION__
);
1380 ret
= proc_connectinfo(ps
, p
);
1383 case USBDEVFS_SETINTERFACE
:
1384 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __FUNCTION__
);
1385 ret
= proc_setintf(ps
, p
);
1388 case USBDEVFS_SETCONFIGURATION
:
1389 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __FUNCTION__
);
1390 ret
= proc_setconfig(ps
, p
);
1393 case USBDEVFS_SUBMITURB
:
1394 snoop(&dev
->dev
, "%s: SUBMITURB\n", __FUNCTION__
);
1395 ret
= proc_submiturb(ps
, p
);
1397 inode
->i_mtime
= CURRENT_TIME
;
1400 #ifdef CONFIG_COMPAT
1402 case USBDEVFS_SUBMITURB32
:
1403 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __FUNCTION__
);
1404 ret
= proc_submiturb_compat(ps
, p
);
1406 inode
->i_mtime
= CURRENT_TIME
;
1409 case USBDEVFS_REAPURB32
:
1410 snoop(&dev
->dev
, "%s: REAPURB32\n", __FUNCTION__
);
1411 ret
= proc_reapurb_compat(ps
, p
);
1414 case USBDEVFS_REAPURBNDELAY32
:
1415 snoop(&dev
->dev
, "%s: REAPURBDELAY32\n", __FUNCTION__
);
1416 ret
= proc_reapurbnonblock_compat(ps
, p
);
1421 case USBDEVFS_DISCARDURB
:
1422 snoop(&dev
->dev
, "%s: DISCARDURB\n", __FUNCTION__
);
1423 ret
= proc_unlinkurb(ps
, p
);
1426 case USBDEVFS_REAPURB
:
1427 snoop(&dev
->dev
, "%s: REAPURB\n", __FUNCTION__
);
1428 ret
= proc_reapurb(ps
, p
);
1431 case USBDEVFS_REAPURBNDELAY
:
1432 snoop(&dev
->dev
, "%s: REAPURBDELAY\n", __FUNCTION__
);
1433 ret
= proc_reapurbnonblock(ps
, p
);
1436 case USBDEVFS_DISCSIGNAL
:
1437 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __FUNCTION__
);
1438 ret
= proc_disconnectsignal(ps
, p
);
1441 case USBDEVFS_CLAIMINTERFACE
:
1442 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __FUNCTION__
);
1443 ret
= proc_claiminterface(ps
, p
);
1446 case USBDEVFS_RELEASEINTERFACE
:
1447 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __FUNCTION__
);
1448 ret
= proc_releaseinterface(ps
, p
);
1451 case USBDEVFS_IOCTL
:
1452 snoop(&dev
->dev
, "%s: IOCTL\n", __FUNCTION__
);
1453 ret
= proc_ioctl(ps
, p
);
1456 usb_unlock_device(dev
);
1458 inode
->i_atime
= CURRENT_TIME
;
1462 /* No kernel lock - fine */
1463 static unsigned int usbdev_poll(struct file
*file
, struct poll_table_struct
*wait
)
1465 struct dev_state
*ps
= (struct dev_state
*)file
->private_data
;
1466 unsigned int mask
= 0;
1468 poll_wait(file
, &ps
->wait
, wait
);
1469 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1470 mask
|= POLLOUT
| POLLWRNORM
;
1471 if (!connected(ps
->dev
))
1472 mask
|= POLLERR
| POLLHUP
;
1476 struct file_operations usbfs_device_file_operations
= {
1477 .llseek
= usbdev_lseek
,
1478 .read
= usbdev_read
,
1479 .poll
= usbdev_poll
,
1480 .ioctl
= usbdev_ioctl
,
1481 .open
= usbdev_open
,
1482 .release
= usbdev_release
,