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;
62 /* Mutual exclusion for removal, open, and release */
63 DEFINE_MUTEX(usbfs_mutex);
66 struct list_head asynclist;
72 void __user *userbuffer;
78 static int usbfs_snoop = 0;
79 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
80 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
82 #define snoop(dev, format, arg...) \
85 dev_info( dev , format , ## arg); \
88 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
91 #define MAX_USBFS_BUFFER_SIZE 16384
93 static inline int connected (struct usb_device *dev)
95 return dev->state != USB_STATE_NOTATTACHED;
98 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
106 file->f_pos = offset;
110 file->f_pos += offset;
122 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
124 struct dev_state *ps = (struct dev_state *)file->private_data;
125 struct usb_device *dev = ps->dev;
132 usb_lock_device(dev);
133 if (!connected(dev)) {
136 } else if (pos < 0) {
141 if (pos < sizeof(struct usb_device_descriptor)) {
142 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
144 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
145 le16_to_cpus(&temp_desc.bcdUSB);
146 le16_to_cpus(&temp_desc.idVendor);
147 le16_to_cpus(&temp_desc.idProduct);
148 le16_to_cpus(&temp_desc.bcdDevice);
150 len = sizeof(struct usb_device_descriptor) - pos;
153 if (copy_to_user(buf, ((char *)&temp_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,
320 as->euid, as->secid);
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 = {
406 .probe = driver_probe,
407 .disconnect = driver_disconnect,
410 static int claimintf(struct dev_state *ps, unsigned int ifnum)
412 struct usb_device *dev = ps->dev;
413 struct usb_interface *intf;
416 if (ifnum >= 8*sizeof(ps->ifclaimed))
418 /* already claimed */
419 if (test_bit(ifnum, &ps->ifclaimed))
422 /* lock against other changes to driver bindings */
423 down_write(&usb_bus_type.subsys.rwsem);
424 intf = usb_ifnum_to_if(dev, ifnum);
428 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
429 up_write(&usb_bus_type.subsys.rwsem);
431 set_bit(ifnum, &ps->ifclaimed);
435 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
437 struct usb_device *dev;
438 struct usb_interface *intf;
442 if (ifnum >= 8*sizeof(ps->ifclaimed))
445 /* lock against other changes to driver bindings */
446 down_write(&usb_bus_type.subsys.rwsem);
447 intf = usb_ifnum_to_if(dev, ifnum);
450 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
451 usb_driver_release_interface(&usbfs_driver, intf);
454 up_write(&usb_bus_type.subsys.rwsem);
458 static int checkintf(struct dev_state *ps, unsigned int ifnum)
460 if (ps->dev->state != USB_STATE_CONFIGURED)
461 return -EHOSTUNREACH;
462 if (ifnum >= 8*sizeof(ps->ifclaimed))
464 if (test_bit(ifnum, &ps->ifclaimed))
466 /* if not yet claimed, claim it for the driver */
467 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
468 current->pid, current->comm, ifnum);
469 return claimintf(ps, ifnum);
472 static int findintfep(struct usb_device *dev, unsigned int ep)
474 unsigned int i, j, e;
475 struct usb_interface *intf;
476 struct usb_host_interface *alts;
477 struct usb_endpoint_descriptor *endpt;
479 if (ep & ~(USB_DIR_IN|0xf))
483 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
484 intf = dev->actconfig->interface[i];
485 for (j = 0; j < intf->num_altsetting; j++) {
486 alts = &intf->altsetting[j];
487 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
488 endpt = &alts->endpoint[e].desc;
489 if (endpt->bEndpointAddress == ep)
490 return alts->desc.bInterfaceNumber;
497 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
501 if (ps->dev->state != USB_STATE_ADDRESS
502 && 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;
547 /* Protect against simultaneous removal or release */
548 mutex_lock(&usbfs_mutex);
551 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
555 /* check if we are called from a real node or usbfs */
556 if (imajor(inode) == USB_DEVICE_MAJOR)
557 dev = usbdev_lookup_minor(iminor(inode));
559 dev = inode->i_private;
568 spin_lock_init(&ps->lock);
569 INIT_LIST_HEAD(&ps->async_pending);
570 INIT_LIST_HEAD(&ps->async_completed);
571 init_waitqueue_head(&ps->wait);
573 ps->disc_pid = current->pid;
574 ps->disc_uid = current->uid;
575 ps->disc_euid = current->euid;
576 ps->disccontext = NULL;
578 security_task_getsecid(current, &ps->secid);
580 list_add_tail(&ps->list, &dev->filelist);
581 file->private_data = ps;
583 mutex_unlock(&usbfs_mutex);
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);
595 /* Protect against simultaneous open */
596 mutex_lock(&usbfs_mutex);
597 list_del_init(&ps->list);
598 mutex_unlock(&usbfs_mutex);
600 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
602 if (test_bit(ifnum, &ps->ifclaimed))
603 releaseintf(ps, ifnum);
605 destroy_all_async(ps);
606 usb_unlock_device(dev);
612 static int proc_control(struct dev_state *ps, void __user *arg)
614 struct usb_device *dev = ps->dev;
615 struct usbdevfs_ctrltransfer ctrl;
620 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
622 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
624 if (ctrl.wLength > PAGE_SIZE)
626 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
629 if (ctrl.bRequestType & 0x80) {
630 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
631 free_page((unsigned long)tbuf);
634 snoop(&dev->dev, "control read: bRequest=%02x "
635 "bRrequestType=%02x wValue=%04x "
636 "wIndex=%04x wLength=%04x\n",
637 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
638 ctrl.wIndex, ctrl.wLength);
640 usb_unlock_device(dev);
641 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
642 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
643 usb_lock_device(dev);
644 if ((i > 0) && ctrl.wLength) {
646 dev_info(&dev->dev, "control read: data ");
647 for (j = 0; j < i; ++j)
648 printk("%02x ", (unsigned char)(tbuf)[j]);
651 if (copy_to_user(ctrl.data, tbuf, i)) {
652 free_page((unsigned long)tbuf);
658 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
659 free_page((unsigned long)tbuf);
663 snoop(&dev->dev, "control write: bRequest=%02x "
664 "bRrequestType=%02x wValue=%04x "
665 "wIndex=%04x wLength=%04x\n",
666 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
667 ctrl.wIndex, ctrl.wLength);
669 dev_info(&dev->dev, "control write: data: ");
670 for (j = 0; j < ctrl.wLength; ++j)
671 printk("%02x ", (unsigned char)(tbuf)[j]);
674 usb_unlock_device(dev);
675 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
676 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
677 usb_lock_device(dev);
679 free_page((unsigned long)tbuf);
680 if (i<0 && i != -EPIPE) {
681 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
682 "failed cmd %s rqt %u rq %u len %u ret %d\n",
683 current->comm, ctrl.bRequestType, ctrl.bRequest,
689 static int proc_bulk(struct dev_state *ps, void __user *arg)
691 struct usb_device *dev = ps->dev;
692 struct usbdevfs_bulktransfer bulk;
693 unsigned int tmo, len1, pipe;
698 if (copy_from_user(&bulk, arg, sizeof(bulk)))
700 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
702 if ((ret = checkintf(ps, ret)))
704 if (bulk.ep & USB_DIR_IN)
705 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
707 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
708 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
711 if (len1 > MAX_USBFS_BUFFER_SIZE)
713 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
716 if (bulk.ep & 0x80) {
717 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
721 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
722 bulk.len, bulk.timeout);
723 usb_unlock_device(dev);
724 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
725 usb_lock_device(dev);
728 dev_info(&dev->dev, "bulk read: data ");
729 for (j = 0; j < len2; ++j)
730 printk("%02x ", (unsigned char)(tbuf)[j]);
733 if (copy_to_user(bulk.data, tbuf, len2)) {
740 if (copy_from_user(tbuf, bulk.data, len1)) {
745 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
746 bulk.len, bulk.timeout);
748 dev_info(&dev->dev, "bulk write: data: ");
749 for (j = 0; j < len1; ++j)
750 printk("%02x ", (unsigned char)(tbuf)[j]);
753 usb_unlock_device(dev);
754 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
755 usb_lock_device(dev);
763 static int proc_resetep(struct dev_state *ps, void __user *arg)
768 if (get_user(ep, (unsigned int __user *)arg))
770 if ((ret = findintfep(ps->dev, ep)) < 0)
772 if ((ret = checkintf(ps, ret)))
774 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
778 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
784 if (get_user(ep, (unsigned int __user *)arg))
786 if ((ret = findintfep(ps->dev, ep)) < 0)
788 if ((ret = checkintf(ps, ret)))
791 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
793 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
795 return usb_clear_halt(ps->dev, pipe);
799 static int proc_getdriver(struct dev_state *ps, void __user *arg)
801 struct usbdevfs_getdriver gd;
802 struct usb_interface *intf;
805 if (copy_from_user(&gd, arg, sizeof(gd)))
807 down_read(&usb_bus_type.subsys.rwsem);
808 intf = usb_ifnum_to_if(ps->dev, gd.interface);
809 if (!intf || !intf->dev.driver)
812 strncpy(gd.driver, intf->dev.driver->name,
814 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
816 up_read(&usb_bus_type.subsys.rwsem);
820 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
822 struct usbdevfs_connectinfo ci;
824 ci.devnum = ps->dev->devnum;
825 ci.slow = ps->dev->speed == USB_SPEED_LOW;
826 if (copy_to_user(arg, &ci, sizeof(ci)))
831 static int proc_resetdevice(struct dev_state *ps)
833 return usb_reset_composite_device(ps->dev, NULL);
836 static int proc_setintf(struct dev_state *ps, void __user *arg)
838 struct usbdevfs_setinterface setintf;
841 if (copy_from_user(&setintf, arg, sizeof(setintf)))
843 if ((ret = checkintf(ps, setintf.interface)))
845 return usb_set_interface(ps->dev, setintf.interface,
849 static int proc_setconfig(struct dev_state *ps, void __user *arg)
853 struct usb_host_config *actconfig;
855 if (get_user(u, (unsigned int __user *)arg))
858 actconfig = ps->dev->actconfig;
860 /* Don't touch the device if any interfaces are claimed.
861 * It could interfere with other drivers' operations, and if
862 * an interface is claimed by usbfs it could easily deadlock.
867 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
868 if (usb_interface_claimed(actconfig->interface[i])) {
869 dev_warn (&ps->dev->dev,
870 "usbfs: interface %d claimed by %s "
871 "while '%s' sets config #%d\n",
872 actconfig->interface[i]
874 ->desc.bInterfaceNumber,
875 actconfig->interface[i]
884 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
885 * so avoid usb_set_configuration()'s kick to sysfs
888 if (actconfig && actconfig->desc.bConfigurationValue == u)
889 status = usb_reset_configuration(ps->dev);
891 status = usb_set_configuration(ps->dev, u);
897 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
898 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
901 struct usbdevfs_iso_packet_desc *isopkt = NULL;
902 struct usb_host_endpoint *ep;
904 struct usb_ctrlrequest *dr = NULL;
905 unsigned int u, totlen, isofrmlen;
906 int ret, interval = 0, ifnum = -1;
908 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
909 URB_NO_FSBR|URB_ZERO_PACKET))
913 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
915 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
916 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
918 if ((ret = checkintf(ps, ifnum)))
921 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
922 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
924 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
928 case USBDEVFS_URB_TYPE_CONTROL:
929 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
930 != USB_ENDPOINT_XFER_CONTROL)
932 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
933 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
935 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
937 if (copy_from_user(dr, uurb->buffer, 8)) {
941 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
945 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
949 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
950 uurb->number_of_packets = 0;
951 uurb->buffer_length = le16_to_cpup(&dr->wLength);
953 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
957 snoop(&ps->dev->dev, "control urb\n");
960 case USBDEVFS_URB_TYPE_BULK:
961 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
962 case USB_ENDPOINT_XFER_CONTROL:
963 case USB_ENDPOINT_XFER_ISOC:
965 /* allow single-shot interrupt transfers, at bogus rates */
967 uurb->number_of_packets = 0;
968 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
970 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
972 snoop(&ps->dev->dev, "bulk urb\n");
975 case USBDEVFS_URB_TYPE_ISO:
976 /* arbitrary limit */
977 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
979 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
980 != USB_ENDPOINT_XFER_ISOC)
982 interval = 1 << min (15, ep->desc.bInterval - 1);
983 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
984 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
986 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
990 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
991 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
992 if (isopkt[u].length > 8192) {
996 totlen += isopkt[u].length;
998 if (totlen > 32768) {
1002 uurb->buffer_length = totlen;
1003 snoop(&ps->dev->dev, "iso urb\n");
1006 case USBDEVFS_URB_TYPE_INTERRUPT:
1007 uurb->number_of_packets = 0;
1008 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1009 != USB_ENDPOINT_XFER_INT)
1011 if (ps->dev->speed == USB_SPEED_HIGH)
1012 interval = 1 << min (15, ep->desc.bInterval - 1);
1014 interval = ep->desc.bInterval;
1015 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1017 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1019 snoop(&ps->dev->dev, "interrupt urb\n");
1025 if (!(as = alloc_async(uurb->number_of_packets))) {
1030 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1036 as->urb->dev = ps->dev;
1037 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1038 as->urb->transfer_flags = uurb->flags;
1039 as->urb->transfer_buffer_length = uurb->buffer_length;
1040 as->urb->setup_packet = (unsigned char*)dr;
1041 as->urb->start_frame = uurb->start_frame;
1042 as->urb->number_of_packets = uurb->number_of_packets;
1043 as->urb->interval = interval;
1044 as->urb->context = as;
1045 as->urb->complete = async_completed;
1046 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1047 as->urb->iso_frame_desc[u].offset = totlen;
1048 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1049 totlen += isopkt[u].length;
1054 if (uurb->endpoint & USB_DIR_IN)
1055 as->userbuffer = uurb->buffer;
1057 as->userbuffer = NULL;
1058 as->signr = uurb->signr;
1060 as->pid = current->pid;
1061 as->uid = current->uid;
1062 as->euid = current->euid;
1063 security_task_getsecid(current, &as->secid);
1064 if (!(uurb->endpoint & USB_DIR_IN)) {
1065 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1070 snoop(&as->urb->dev->dev, "submit urb\n");
1071 snoop_urb(as->urb, as->userurb);
1072 async_newpending(as);
1073 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1074 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1075 async_removepending(as);
1082 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1084 struct usbdevfs_urb uurb;
1086 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1089 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1092 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1096 as = async_getpending(ps, arg);
1099 usb_kill_urb(as->urb);
1103 static int processcompl(struct async *as, void __user * __user *arg)
1105 struct urb *urb = as->urb;
1106 struct usbdevfs_urb __user *userurb = as->userurb;
1107 void __user *addr = as->userurb;
1111 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1113 if (put_user(urb->status, &userurb->status))
1115 if (put_user(urb->actual_length, &userurb->actual_length))
1117 if (put_user(urb->error_count, &userurb->error_count))
1120 if (usb_pipeisoc(urb->pipe)) {
1121 for (i = 0; i < urb->number_of_packets; i++) {
1122 if (put_user(urb->iso_frame_desc[i].actual_length,
1123 &userurb->iso_frame_desc[i].actual_length))
1125 if (put_user(urb->iso_frame_desc[i].status,
1126 &userurb->iso_frame_desc[i].status))
1133 if (put_user(addr, (void __user * __user *)arg))
1138 static struct async* reap_as(struct dev_state *ps)
1140 DECLARE_WAITQUEUE(wait, current);
1141 struct async *as = NULL;
1142 struct usb_device *dev = ps->dev;
1144 add_wait_queue(&ps->wait, &wait);
1146 __set_current_state(TASK_INTERRUPTIBLE);
1147 if ((as = async_getcompleted(ps)))
1149 if (signal_pending(current))
1151 usb_unlock_device(dev);
1153 usb_lock_device(dev);
1155 remove_wait_queue(&ps->wait, &wait);
1156 set_current_state(TASK_RUNNING);
1160 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1162 struct async *as = reap_as(ps);
1164 return processcompl(as, (void __user * __user *)arg);
1165 if (signal_pending(current))
1170 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1174 if (!(as = async_getcompleted(ps)))
1176 return processcompl(as, (void __user * __user *)arg);
1179 #ifdef CONFIG_COMPAT
1181 static int get_urb32(struct usbdevfs_urb *kurb,
1182 struct usbdevfs_urb32 __user *uurb)
1185 if (get_user(kurb->type, &uurb->type) ||
1186 __get_user(kurb->endpoint, &uurb->endpoint) ||
1187 __get_user(kurb->status, &uurb->status) ||
1188 __get_user(kurb->flags, &uurb->flags) ||
1189 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1190 __get_user(kurb->actual_length, &uurb->actual_length) ||
1191 __get_user(kurb->start_frame, &uurb->start_frame) ||
1192 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1193 __get_user(kurb->error_count, &uurb->error_count) ||
1194 __get_user(kurb->signr, &uurb->signr))
1197 if (__get_user(uptr, &uurb->buffer))
1199 kurb->buffer = compat_ptr(uptr);
1200 if (__get_user(uptr, &uurb->buffer))
1202 kurb->usercontext = compat_ptr(uptr);
1207 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1209 struct usbdevfs_urb uurb;
1211 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1214 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1217 static int processcompl_compat(struct async *as, void __user * __user *arg)
1219 struct urb *urb = as->urb;
1220 struct usbdevfs_urb32 __user *userurb = as->userurb;
1221 void __user *addr = as->userurb;
1225 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1227 if (put_user(urb->status, &userurb->status))
1229 if (put_user(urb->actual_length, &userurb->actual_length))
1231 if (put_user(urb->error_count, &userurb->error_count))
1234 if (usb_pipeisoc(urb->pipe)) {
1235 for (i = 0; i < urb->number_of_packets; i++) {
1236 if (put_user(urb->iso_frame_desc[i].actual_length,
1237 &userurb->iso_frame_desc[i].actual_length))
1239 if (put_user(urb->iso_frame_desc[i].status,
1240 &userurb->iso_frame_desc[i].status))
1246 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1251 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1253 struct async *as = reap_as(ps);
1255 return processcompl_compat(as, (void __user * __user *)arg);
1256 if (signal_pending(current))
1261 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1265 if (!(as = async_getcompleted(ps)))
1267 return processcompl_compat(as, (void __user * __user *)arg);
1272 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1274 struct usbdevfs_disconnectsignal ds;
1276 if (copy_from_user(&ds, arg, sizeof(ds)))
1278 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1280 ps->discsignr = ds.signr;
1281 ps->disccontext = ds.context;
1285 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1289 if (get_user(ifnum, (unsigned int __user *)arg))
1291 return claimintf(ps, ifnum);
1294 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1299 if (get_user(ifnum, (unsigned int __user *)arg))
1301 if ((ret = releaseintf(ps, ifnum)) < 0)
1303 destroy_async_on_interface (ps, ifnum);
1307 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1312 struct usb_interface *intf = NULL;
1313 struct usb_driver *driver = NULL;
1316 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1317 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1319 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1320 if (copy_from_user (buf, ctl->data, size)) {
1325 memset (buf, 0, size);
1329 if (!connected(ps->dev)) {
1334 if (ps->dev->state != USB_STATE_CONFIGURED)
1335 retval = -EHOSTUNREACH;
1336 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1338 else switch (ctl->ioctl_code) {
1340 /* disconnect kernel driver from interface */
1341 case USBDEVFS_DISCONNECT:
1343 down_write(&usb_bus_type.subsys.rwsem);
1344 if (intf->dev.driver) {
1345 driver = to_usb_driver(intf->dev.driver);
1346 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1347 usb_driver_release_interface(driver, intf);
1350 up_write(&usb_bus_type.subsys.rwsem);
1353 /* let kernel drivers try to (re)bind to the interface */
1354 case USBDEVFS_CONNECT:
1355 usb_unlock_device(ps->dev);
1356 bus_rescan_devices(intf->dev.bus);
1357 usb_lock_device(ps->dev);
1360 /* talk directly to the interface's driver */
1362 down_read(&usb_bus_type.subsys.rwsem);
1363 if (intf->dev.driver)
1364 driver = to_usb_driver(intf->dev.driver);
1365 if (driver == NULL || driver->ioctl == NULL) {
1368 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1369 if (retval == -ENOIOCTLCMD)
1372 up_read(&usb_bus_type.subsys.rwsem);
1375 /* cleanup and return */
1377 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1379 && copy_to_user (ctl->data, buf, size) != 0)
1386 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1388 struct usbdevfs_ioctl ctrl;
1390 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1392 return proc_ioctl(ps, &ctrl);
1395 #ifdef CONFIG_COMPAT
1396 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1398 struct usbdevfs_ioctl32 __user *uioc;
1399 struct usbdevfs_ioctl ctrl;
1402 uioc = compat_ptr((long)arg);
1403 if (get_user(ctrl.ifno, &uioc->ifno) ||
1404 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1405 __get_user(udata, &uioc->data))
1407 ctrl.data = compat_ptr(udata);
1409 return proc_ioctl(ps, &ctrl);
1414 * NOTE: All requests here that have interface numbers as parameters
1415 * are assuming that somehow the configuration has been prevented from
1416 * changing. But there's no mechanism to ensure that...
1418 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1420 struct dev_state *ps = (struct dev_state *)file->private_data;
1421 struct usb_device *dev = ps->dev;
1422 void __user *p = (void __user *)arg;
1425 if (!(file->f_mode & FMODE_WRITE))
1427 usb_lock_device(dev);
1428 if (!connected(dev)) {
1429 usb_unlock_device(dev);
1434 case USBDEVFS_CONTROL:
1435 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1436 ret = proc_control(ps, p);
1438 inode->i_mtime = CURRENT_TIME;
1442 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1443 ret = proc_bulk(ps, p);
1445 inode->i_mtime = CURRENT_TIME;
1448 case USBDEVFS_RESETEP:
1449 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1450 ret = proc_resetep(ps, p);
1452 inode->i_mtime = CURRENT_TIME;
1455 case USBDEVFS_RESET:
1456 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1457 ret = proc_resetdevice(ps);
1460 case USBDEVFS_CLEAR_HALT:
1461 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1462 ret = proc_clearhalt(ps, p);
1464 inode->i_mtime = CURRENT_TIME;
1467 case USBDEVFS_GETDRIVER:
1468 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1469 ret = proc_getdriver(ps, p);
1472 case USBDEVFS_CONNECTINFO:
1473 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1474 ret = proc_connectinfo(ps, p);
1477 case USBDEVFS_SETINTERFACE:
1478 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1479 ret = proc_setintf(ps, p);
1482 case USBDEVFS_SETCONFIGURATION:
1483 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1484 ret = proc_setconfig(ps, p);
1487 case USBDEVFS_SUBMITURB:
1488 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1489 ret = proc_submiturb(ps, p);
1491 inode->i_mtime = CURRENT_TIME;
1494 #ifdef CONFIG_COMPAT
1496 case USBDEVFS_SUBMITURB32:
1497 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1498 ret = proc_submiturb_compat(ps, p);
1500 inode->i_mtime = CURRENT_TIME;
1503 case USBDEVFS_REAPURB32:
1504 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1505 ret = proc_reapurb_compat(ps, p);
1508 case USBDEVFS_REAPURBNDELAY32:
1509 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1510 ret = proc_reapurbnonblock_compat(ps, p);
1513 case USBDEVFS_IOCTL32:
1514 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1515 ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p);
1519 case USBDEVFS_DISCARDURB:
1520 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1521 ret = proc_unlinkurb(ps, p);
1524 case USBDEVFS_REAPURB:
1525 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1526 ret = proc_reapurb(ps, p);
1529 case USBDEVFS_REAPURBNDELAY:
1530 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1531 ret = proc_reapurbnonblock(ps, p);
1534 case USBDEVFS_DISCSIGNAL:
1535 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1536 ret = proc_disconnectsignal(ps, p);
1539 case USBDEVFS_CLAIMINTERFACE:
1540 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1541 ret = proc_claiminterface(ps, p);
1544 case USBDEVFS_RELEASEINTERFACE:
1545 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1546 ret = proc_releaseinterface(ps, p);
1549 case USBDEVFS_IOCTL:
1550 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1551 ret = proc_ioctl_default(ps, p);
1554 usb_unlock_device(dev);
1556 inode->i_atime = CURRENT_TIME;
1560 /* No kernel lock - fine */
1561 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1563 struct dev_state *ps = (struct dev_state *)file->private_data;
1564 unsigned int mask = 0;
1566 poll_wait(file, &ps->wait, wait);
1567 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1568 mask |= POLLOUT | POLLWRNORM;
1569 if (!connected(ps->dev))
1570 mask |= POLLERR | POLLHUP;
1574 struct file_operations usbfs_device_file_operations = {
1575 .llseek = usbdev_lseek,
1576 .read = usbdev_read,
1577 .poll = usbdev_poll,
1578 .ioctl = usbdev_ioctl,
1579 .open = usbdev_open,
1580 .release = usbdev_release,
1583 static void usbdev_add(struct usb_device *dev)
1585 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1587 dev->class_dev = class_device_create(usb_device_class, NULL,
1588 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1589 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1591 dev->class_dev->class_data = dev;
1594 static void usbdev_remove(struct usb_device *dev)
1596 class_device_unregister(dev->class_dev);
1599 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1603 case USB_DEVICE_ADD:
1606 case USB_DEVICE_REMOVE:
1613 static struct notifier_block usbdev_nb = {
1614 .notifier_call = usbdev_notify,
1617 static struct cdev usb_device_cdev = {
1618 .kobj = {.name = "usb_device", },
1619 .owner = THIS_MODULE,
1622 int __init usbdev_init(void)
1626 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1629 err("unable to register minors for usb_device");
1632 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1633 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1635 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1638 usb_device_class = class_create(THIS_MODULE, "usb_device");
1639 if (IS_ERR(usb_device_class)) {
1640 err("unable to register usb_device class");
1641 retval = PTR_ERR(usb_device_class);
1645 usb_register_notify(&usbdev_nb);
1651 usb_device_class = NULL;
1652 cdev_del(&usb_device_cdev);
1655 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1659 void usbdev_cleanup(void)
1661 usb_unregister_notify(&usbdev_nb);
1662 class_destroy(usb_device_class);
1663 cdev_del(&usb_device_cdev);
1664 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);