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 dev_state *ps)
95 return (!list_empty(&ps->list) &&
96 ps->dev->state != USB_STATE_NOTATTACHED);
99 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
107 file->f_pos = offset;
111 file->f_pos += offset;
123 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
125 struct dev_state *ps = file->private_data;
126 struct usb_device *dev = ps->dev;
133 usb_lock_device(dev);
134 if (!connected(ps)) {
137 } else if (pos < 0) {
142 if (pos < sizeof(struct usb_device_descriptor)) {
143 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
145 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
146 le16_to_cpus(&temp_desc.bcdUSB);
147 le16_to_cpus(&temp_desc.idVendor);
148 le16_to_cpus(&temp_desc.idProduct);
149 le16_to_cpus(&temp_desc.bcdDevice);
151 len = sizeof(struct usb_device_descriptor) - pos;
154 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
165 pos = sizeof(struct usb_device_descriptor);
166 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
167 struct usb_config_descriptor *config =
168 (struct usb_config_descriptor *)dev->rawdescriptors[i];
169 unsigned int length = le16_to_cpu(config->wTotalLength);
171 if (*ppos < pos + length) {
173 /* The descriptor may claim to be longer than it
174 * really is. Here is the actual allocated length. */
176 le16_to_cpu(dev->config[i].desc.wTotalLength);
178 len = length - (*ppos - pos);
182 /* Simply don't write (skip over) unallocated parts */
183 if (alloclen > (*ppos - pos)) {
184 alloclen -= (*ppos - pos);
185 if (copy_to_user(buf,
186 dev->rawdescriptors[i] + (*ppos - pos),
187 min(len, alloclen))) {
203 usb_unlock_device(dev);
208 * async list handling
211 static struct async *alloc_async(unsigned int numisoframes)
213 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
214 struct async *as = kzalloc(assize, GFP_KERNEL);
218 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
226 static void free_async(struct async *as)
229 kfree(as->urb->transfer_buffer);
230 kfree(as->urb->setup_packet);
231 usb_free_urb(as->urb);
235 static inline void async_newpending(struct async *as)
237 struct dev_state *ps = as->ps;
240 spin_lock_irqsave(&ps->lock, flags);
241 list_add_tail(&as->asynclist, &ps->async_pending);
242 spin_unlock_irqrestore(&ps->lock, flags);
245 static inline void async_removepending(struct async *as)
247 struct dev_state *ps = as->ps;
250 spin_lock_irqsave(&ps->lock, flags);
251 list_del_init(&as->asynclist);
252 spin_unlock_irqrestore(&ps->lock, flags);
255 static inline struct async *async_getcompleted(struct dev_state *ps)
258 struct async *as = NULL;
260 spin_lock_irqsave(&ps->lock, flags);
261 if (!list_empty(&ps->async_completed)) {
262 as = list_entry(ps->async_completed.next, struct async, asynclist);
263 list_del_init(&as->asynclist);
265 spin_unlock_irqrestore(&ps->lock, flags);
269 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
274 spin_lock_irqsave(&ps->lock, flags);
275 list_for_each_entry(as, &ps->async_pending, asynclist)
276 if (as->userurb == userurb) {
277 list_del_init(&as->asynclist);
278 spin_unlock_irqrestore(&ps->lock, flags);
281 spin_unlock_irqrestore(&ps->lock, flags);
285 static void snoop_urb(struct urb *urb, void __user *userurb)
288 unsigned char *data = urb->transfer_buffer;
293 if (urb->pipe & USB_DIR_IN)
294 dev_info(&urb->dev->dev, "direction=IN\n");
296 dev_info(&urb->dev->dev, "direction=OUT\n");
297 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
298 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
299 urb->transfer_buffer_length);
300 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
301 dev_info(&urb->dev->dev, "data: ");
302 for (j = 0; j < urb->transfer_buffer_length; ++j)
303 printk ("%02x ", data[j]);
307 static void async_completed(struct urb *urb)
309 struct async *as = urb->context;
310 struct dev_state *ps = as->ps;
311 struct siginfo sinfo;
313 spin_lock(&ps->lock);
314 list_move_tail(&as->asynclist, &ps->async_completed);
315 spin_unlock(&ps->lock);
317 sinfo.si_signo = as->signr;
318 sinfo.si_errno = as->urb->status;
319 sinfo.si_code = SI_ASYNCIO;
320 sinfo.si_addr = as->userurb;
321 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
322 as->euid, as->secid);
324 snoop(&urb->dev->dev, "urb complete\n");
325 snoop_urb(urb, as->userurb);
329 static void destroy_async (struct dev_state *ps, struct list_head *list)
334 spin_lock_irqsave(&ps->lock, flags);
335 while (!list_empty(list)) {
336 as = list_entry(list->next, struct async, asynclist);
337 list_del_init(&as->asynclist);
339 /* drop the spinlock so the completion handler can run */
340 spin_unlock_irqrestore(&ps->lock, flags);
341 usb_kill_urb(as->urb);
342 spin_lock_irqsave(&ps->lock, flags);
344 spin_unlock_irqrestore(&ps->lock, flags);
345 as = async_getcompleted(ps);
348 as = async_getcompleted(ps);
352 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
354 struct list_head *p, *q, hitlist;
357 INIT_LIST_HEAD(&hitlist);
358 spin_lock_irqsave(&ps->lock, flags);
359 list_for_each_safe(p, q, &ps->async_pending)
360 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
361 list_move_tail(p, &hitlist);
362 spin_unlock_irqrestore(&ps->lock, flags);
363 destroy_async(ps, &hitlist);
366 static inline void destroy_all_async(struct dev_state *ps)
368 destroy_async(ps, &ps->async_pending);
372 * interface claims are made only at the request of user level code,
373 * which can also release them (explicitly or by closing files).
374 * they're also undone when devices disconnect.
377 static int driver_probe (struct usb_interface *intf,
378 const struct usb_device_id *id)
383 static void driver_disconnect(struct usb_interface *intf)
385 struct dev_state *ps = usb_get_intfdata (intf);
386 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
391 /* NOTE: this relies on usbcore having canceled and completed
392 * all pending I/O requests; 2.6 does that.
395 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
396 clear_bit(ifnum, &ps->ifclaimed);
398 warn("interface number %u out of range", ifnum);
400 usb_set_intfdata (intf, NULL);
402 /* force async requests to complete */
403 destroy_async_on_interface(ps, ifnum);
406 struct usb_driver usbfs_driver = {
408 .probe = driver_probe,
409 .disconnect = driver_disconnect,
412 static int claimintf(struct dev_state *ps, unsigned int ifnum)
414 struct usb_device *dev = ps->dev;
415 struct usb_interface *intf;
418 if (ifnum >= 8*sizeof(ps->ifclaimed))
420 /* already claimed */
421 if (test_bit(ifnum, &ps->ifclaimed))
424 intf = usb_ifnum_to_if(dev, ifnum);
428 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
430 set_bit(ifnum, &ps->ifclaimed);
434 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
436 struct usb_device *dev;
437 struct usb_interface *intf;
441 if (ifnum >= 8*sizeof(ps->ifclaimed))
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);
454 static int checkintf(struct dev_state *ps, unsigned int ifnum)
456 if (ps->dev->state != USB_STATE_CONFIGURED)
457 return -EHOSTUNREACH;
458 if (ifnum >= 8*sizeof(ps->ifclaimed))
460 if (test_bit(ifnum, &ps->ifclaimed))
462 /* if not yet claimed, claim it for the driver */
463 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
464 current->pid, current->comm, ifnum);
465 return claimintf(ps, ifnum);
468 static int findintfep(struct usb_device *dev, unsigned int ep)
470 unsigned int i, j, e;
471 struct usb_interface *intf;
472 struct usb_host_interface *alts;
473 struct usb_endpoint_descriptor *endpt;
475 if (ep & ~(USB_DIR_IN|0xf))
479 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
480 intf = dev->actconfig->interface[i];
481 for (j = 0; j < intf->num_altsetting; j++) {
482 alts = &intf->altsetting[j];
483 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
484 endpt = &alts->endpoint[e].desc;
485 if (endpt->bEndpointAddress == ep)
486 return alts->desc.bInterfaceNumber;
493 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
497 if (ps->dev->state != USB_STATE_ADDRESS
498 && ps->dev->state != USB_STATE_CONFIGURED)
499 return -EHOSTUNREACH;
500 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
504 switch (requesttype & USB_RECIP_MASK) {
505 case USB_RECIP_ENDPOINT:
506 if ((ret = findintfep(ps->dev, index)) >= 0)
507 ret = checkintf(ps, ret);
510 case USB_RECIP_INTERFACE:
511 ret = checkintf(ps, index);
517 static struct usb_device *usbdev_lookup_minor(int minor)
519 struct device *device;
520 struct usb_device *udev = NULL;
522 down(&usb_device_class->sem);
523 list_for_each_entry(device, &usb_device_class->devices, node) {
524 if (device->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
525 udev = device->platform_data;
529 up(&usb_device_class->sem);
537 static int usbdev_open(struct inode *inode, struct file *file)
539 struct usb_device *dev = NULL;
540 struct dev_state *ps;
543 /* Protect against simultaneous removal or release */
544 mutex_lock(&usbfs_mutex);
547 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
551 /* check if we are called from a real node or usbfs */
552 if (imajor(inode) == USB_DEVICE_MAJOR)
553 dev = usbdev_lookup_minor(iminor(inode));
555 dev = inode->i_private;
558 ret = usb_autoresume_device(dev);
566 spin_lock_init(&ps->lock);
567 INIT_LIST_HEAD(&ps->list);
568 INIT_LIST_HEAD(&ps->async_pending);
569 INIT_LIST_HEAD(&ps->async_completed);
570 init_waitqueue_head(&ps->wait);
572 ps->disc_pid = get_pid(task_pid(current));
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;
584 mutex_unlock(&usbfs_mutex);
588 static int usbdev_release(struct inode *inode, struct file *file)
590 struct dev_state *ps = file->private_data;
591 struct usb_device *dev = ps->dev;
594 usb_lock_device(dev);
596 /* Protect against simultaneous open */
597 mutex_lock(&usbfs_mutex);
598 list_del_init(&ps->list);
599 mutex_unlock(&usbfs_mutex);
601 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
603 if (test_bit(ifnum, &ps->ifclaimed))
604 releaseintf(ps, ifnum);
606 destroy_all_async(ps);
607 usb_autosuspend_device(dev);
608 usb_unlock_device(dev);
610 put_pid(ps->disc_pid);
615 static int proc_control(struct dev_state *ps, void __user *arg)
617 struct usb_device *dev = ps->dev;
618 struct usbdevfs_ctrltransfer ctrl;
623 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
625 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
627 if (ctrl.wLength > PAGE_SIZE)
629 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
632 if (ctrl.bRequestType & 0x80) {
633 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
634 free_page((unsigned long)tbuf);
637 snoop(&dev->dev, "control read: bRequest=%02x "
638 "bRrequestType=%02x wValue=%04x "
639 "wIndex=%04x wLength=%04x\n",
640 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
641 ctrl.wIndex, ctrl.wLength);
643 usb_unlock_device(dev);
644 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
645 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
646 usb_lock_device(dev);
647 if ((i > 0) && ctrl.wLength) {
649 dev_info(&dev->dev, "control read: data ");
650 for (j = 0; j < i; ++j)
651 printk("%02x ", (unsigned char)(tbuf)[j]);
654 if (copy_to_user(ctrl.data, tbuf, i)) {
655 free_page((unsigned long)tbuf);
661 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
662 free_page((unsigned long)tbuf);
666 snoop(&dev->dev, "control write: bRequest=%02x "
667 "bRrequestType=%02x wValue=%04x "
668 "wIndex=%04x wLength=%04x\n",
669 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
670 ctrl.wIndex, ctrl.wLength);
672 dev_info(&dev->dev, "control write: data: ");
673 for (j = 0; j < ctrl.wLength; ++j)
674 printk("%02x ", (unsigned char)(tbuf)[j]);
677 usb_unlock_device(dev);
678 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
679 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
680 usb_lock_device(dev);
682 free_page((unsigned long)tbuf);
683 if (i<0 && i != -EPIPE) {
684 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
685 "failed cmd %s rqt %u rq %u len %u ret %d\n",
686 current->comm, ctrl.bRequestType, ctrl.bRequest,
692 static int proc_bulk(struct dev_state *ps, void __user *arg)
694 struct usb_device *dev = ps->dev;
695 struct usbdevfs_bulktransfer bulk;
696 unsigned int tmo, len1, pipe;
701 if (copy_from_user(&bulk, arg, sizeof(bulk)))
703 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
705 if ((ret = checkintf(ps, ret)))
707 if (bulk.ep & USB_DIR_IN)
708 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
710 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
711 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
714 if (len1 > MAX_USBFS_BUFFER_SIZE)
716 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
719 if (bulk.ep & 0x80) {
720 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
724 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
725 bulk.len, bulk.timeout);
726 usb_unlock_device(dev);
727 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
728 usb_lock_device(dev);
731 dev_info(&dev->dev, "bulk read: data ");
732 for (j = 0; j < len2; ++j)
733 printk("%02x ", (unsigned char)(tbuf)[j]);
736 if (copy_to_user(bulk.data, tbuf, len2)) {
743 if (copy_from_user(tbuf, bulk.data, len1)) {
748 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
749 bulk.len, bulk.timeout);
751 dev_info(&dev->dev, "bulk write: data: ");
752 for (j = 0; j < len1; ++j)
753 printk("%02x ", (unsigned char)(tbuf)[j]);
756 usb_unlock_device(dev);
757 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
758 usb_lock_device(dev);
766 static int proc_resetep(struct dev_state *ps, void __user *arg)
771 if (get_user(ep, (unsigned int __user *)arg))
773 if ((ret = findintfep(ps->dev, ep)) < 0)
775 if ((ret = checkintf(ps, ret)))
777 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
781 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
787 if (get_user(ep, (unsigned int __user *)arg))
789 if ((ret = findintfep(ps->dev, ep)) < 0)
791 if ((ret = checkintf(ps, ret)))
794 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
796 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
798 return usb_clear_halt(ps->dev, pipe);
802 static int proc_getdriver(struct dev_state *ps, void __user *arg)
804 struct usbdevfs_getdriver gd;
805 struct usb_interface *intf;
808 if (copy_from_user(&gd, arg, sizeof(gd)))
810 intf = usb_ifnum_to_if(ps->dev, gd.interface);
811 if (!intf || !intf->dev.driver)
814 strncpy(gd.driver, intf->dev.driver->name,
816 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
821 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
823 struct usbdevfs_connectinfo ci;
825 ci.devnum = ps->dev->devnum;
826 ci.slow = ps->dev->speed == USB_SPEED_LOW;
827 if (copy_to_user(arg, &ci, sizeof(ci)))
832 static int proc_resetdevice(struct dev_state *ps)
834 return usb_reset_composite_device(ps->dev, NULL);
837 static int proc_setintf(struct dev_state *ps, void __user *arg)
839 struct usbdevfs_setinterface setintf;
842 if (copy_from_user(&setintf, arg, sizeof(setintf)))
844 if ((ret = checkintf(ps, setintf.interface)))
846 return usb_set_interface(ps->dev, setintf.interface,
850 static int proc_setconfig(struct dev_state *ps, void __user *arg)
854 struct usb_host_config *actconfig;
856 if (get_user(u, (int __user *)arg))
859 actconfig = ps->dev->actconfig;
861 /* Don't touch the device if any interfaces are claimed.
862 * It could interfere with other drivers' operations, and if
863 * an interface is claimed by usbfs it could easily deadlock.
868 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
869 if (usb_interface_claimed(actconfig->interface[i])) {
870 dev_warn (&ps->dev->dev,
871 "usbfs: interface %d claimed by %s "
872 "while '%s' sets config #%d\n",
873 actconfig->interface[i]
875 ->desc.bInterfaceNumber,
876 actconfig->interface[i]
885 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
886 * so avoid usb_set_configuration()'s kick to sysfs
889 if (actconfig && actconfig->desc.bConfigurationValue == u)
890 status = usb_reset_configuration(ps->dev);
892 status = usb_set_configuration(ps->dev, u);
898 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
899 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
902 struct usbdevfs_iso_packet_desc *isopkt = NULL;
903 struct usb_host_endpoint *ep;
905 struct usb_ctrlrequest *dr = NULL;
906 unsigned int u, totlen, isofrmlen;
909 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
910 URB_NO_FSBR|URB_ZERO_PACKET))
914 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
916 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
917 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
919 if ((ret = checkintf(ps, ifnum)))
922 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
923 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
925 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
929 case USBDEVFS_URB_TYPE_CONTROL:
930 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
931 != USB_ENDPOINT_XFER_CONTROL)
933 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
934 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
936 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
938 if (copy_from_user(dr, uurb->buffer, 8)) {
942 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
946 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
950 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
951 uurb->number_of_packets = 0;
952 uurb->buffer_length = le16_to_cpup(&dr->wLength);
954 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
958 snoop(&ps->dev->dev, "control urb: bRequest=%02x "
959 "bRrequestType=%02x wValue=%04x "
960 "wIndex=%04x wLength=%04x\n",
961 dr->bRequest, dr->bRequestType, dr->wValue,
962 dr->wIndex, dr->wLength);
965 case USBDEVFS_URB_TYPE_BULK:
966 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
967 case USB_ENDPOINT_XFER_CONTROL:
968 case USB_ENDPOINT_XFER_ISOC:
970 /* allow single-shot interrupt transfers, at bogus rates */
972 uurb->number_of_packets = 0;
973 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
975 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
977 snoop(&ps->dev->dev, "bulk urb\n");
980 case USBDEVFS_URB_TYPE_ISO:
981 /* arbitrary limit */
982 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
984 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
985 != USB_ENDPOINT_XFER_ISOC)
987 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
988 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
990 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
994 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
995 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
996 if (isopkt[u].length > 8192) {
1000 totlen += isopkt[u].length;
1002 if (totlen > 32768) {
1006 uurb->buffer_length = totlen;
1007 snoop(&ps->dev->dev, "iso urb\n");
1010 case USBDEVFS_URB_TYPE_INTERRUPT:
1011 uurb->number_of_packets = 0;
1012 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1013 != USB_ENDPOINT_XFER_INT)
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 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1044 ps->dev->speed == USB_SPEED_HIGH)
1045 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1047 as->urb->interval = ep->desc.bInterval;
1048 as->urb->context = as;
1049 as->urb->complete = async_completed;
1050 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1051 as->urb->iso_frame_desc[u].offset = totlen;
1052 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1053 totlen += isopkt[u].length;
1058 if (uurb->endpoint & USB_DIR_IN)
1059 as->userbuffer = uurb->buffer;
1061 as->userbuffer = NULL;
1062 as->signr = uurb->signr;
1064 as->pid = get_pid(task_pid(current));
1065 as->uid = current->uid;
1066 as->euid = current->euid;
1067 security_task_getsecid(current, &as->secid);
1068 if (!(uurb->endpoint & USB_DIR_IN)) {
1069 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1074 snoop(&as->urb->dev->dev, "submit urb\n");
1075 snoop_urb(as->urb, as->userurb);
1076 async_newpending(as);
1077 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1078 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1079 async_removepending(as);
1086 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1088 struct usbdevfs_urb uurb;
1090 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1093 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1096 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1100 as = async_getpending(ps, arg);
1103 usb_kill_urb(as->urb);
1107 static int processcompl(struct async *as, void __user * __user *arg)
1109 struct urb *urb = as->urb;
1110 struct usbdevfs_urb __user *userurb = as->userurb;
1111 void __user *addr = as->userurb;
1115 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1117 if (put_user(urb->status, &userurb->status))
1119 if (put_user(urb->actual_length, &userurb->actual_length))
1121 if (put_user(urb->error_count, &userurb->error_count))
1124 if (usb_pipeisoc(urb->pipe)) {
1125 for (i = 0; i < urb->number_of_packets; i++) {
1126 if (put_user(urb->iso_frame_desc[i].actual_length,
1127 &userurb->iso_frame_desc[i].actual_length))
1129 if (put_user(urb->iso_frame_desc[i].status,
1130 &userurb->iso_frame_desc[i].status))
1137 if (put_user(addr, (void __user * __user *)arg))
1142 static struct async* reap_as(struct dev_state *ps)
1144 DECLARE_WAITQUEUE(wait, current);
1145 struct async *as = NULL;
1146 struct usb_device *dev = ps->dev;
1148 add_wait_queue(&ps->wait, &wait);
1150 __set_current_state(TASK_INTERRUPTIBLE);
1151 if ((as = async_getcompleted(ps)))
1153 if (signal_pending(current))
1155 usb_unlock_device(dev);
1157 usb_lock_device(dev);
1159 remove_wait_queue(&ps->wait, &wait);
1160 set_current_state(TASK_RUNNING);
1164 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1166 struct async *as = reap_as(ps);
1168 return processcompl(as, (void __user * __user *)arg);
1169 if (signal_pending(current))
1174 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1178 if (!(as = async_getcompleted(ps)))
1180 return processcompl(as, (void __user * __user *)arg);
1183 #ifdef CONFIG_COMPAT
1185 static int get_urb32(struct usbdevfs_urb *kurb,
1186 struct usbdevfs_urb32 __user *uurb)
1189 if (get_user(kurb->type, &uurb->type) ||
1190 __get_user(kurb->endpoint, &uurb->endpoint) ||
1191 __get_user(kurb->status, &uurb->status) ||
1192 __get_user(kurb->flags, &uurb->flags) ||
1193 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1194 __get_user(kurb->actual_length, &uurb->actual_length) ||
1195 __get_user(kurb->start_frame, &uurb->start_frame) ||
1196 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1197 __get_user(kurb->error_count, &uurb->error_count) ||
1198 __get_user(kurb->signr, &uurb->signr))
1201 if (__get_user(uptr, &uurb->buffer))
1203 kurb->buffer = compat_ptr(uptr);
1204 if (__get_user(uptr, &uurb->buffer))
1206 kurb->usercontext = compat_ptr(uptr);
1211 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1213 struct usbdevfs_urb uurb;
1215 if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg))
1218 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1221 static int processcompl_compat(struct async *as, void __user * __user *arg)
1223 struct urb *urb = as->urb;
1224 struct usbdevfs_urb32 __user *userurb = as->userurb;
1225 void __user *addr = as->userurb;
1229 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1231 if (put_user(urb->status, &userurb->status))
1233 if (put_user(urb->actual_length, &userurb->actual_length))
1235 if (put_user(urb->error_count, &userurb->error_count))
1238 if (usb_pipeisoc(urb->pipe)) {
1239 for (i = 0; i < urb->number_of_packets; i++) {
1240 if (put_user(urb->iso_frame_desc[i].actual_length,
1241 &userurb->iso_frame_desc[i].actual_length))
1243 if (put_user(urb->iso_frame_desc[i].status,
1244 &userurb->iso_frame_desc[i].status))
1250 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1255 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1257 struct async *as = reap_as(ps);
1259 return processcompl_compat(as, (void __user * __user *)arg);
1260 if (signal_pending(current))
1265 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1269 if (!(as = async_getcompleted(ps)))
1271 return processcompl_compat(as, (void __user * __user *)arg);
1276 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1278 struct usbdevfs_disconnectsignal ds;
1280 if (copy_from_user(&ds, arg, sizeof(ds)))
1282 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1284 ps->discsignr = ds.signr;
1285 ps->disccontext = ds.context;
1289 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1293 if (get_user(ifnum, (unsigned int __user *)arg))
1295 return claimintf(ps, ifnum);
1298 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1303 if (get_user(ifnum, (unsigned int __user *)arg))
1305 if ((ret = releaseintf(ps, ifnum)) < 0)
1307 destroy_async_on_interface (ps, ifnum);
1311 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1316 struct usb_interface *intf = NULL;
1317 struct usb_driver *driver = NULL;
1320 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1321 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1323 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1324 if (copy_from_user (buf, ctl->data, size)) {
1329 memset (buf, 0, size);
1333 if (!connected(ps)) {
1338 if (ps->dev->state != USB_STATE_CONFIGURED)
1339 retval = -EHOSTUNREACH;
1340 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1342 else switch (ctl->ioctl_code) {
1344 /* disconnect kernel driver from interface */
1345 case USBDEVFS_DISCONNECT:
1346 if (intf->dev.driver) {
1347 driver = to_usb_driver(intf->dev.driver);
1348 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1349 usb_driver_release_interface(driver, intf);
1354 /* let kernel drivers try to (re)bind to the interface */
1355 case USBDEVFS_CONNECT:
1356 usb_unlock_device(ps->dev);
1357 retval = bus_rescan_devices(intf->dev.bus);
1358 usb_lock_device(ps->dev);
1361 /* talk directly to the interface's driver */
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)
1374 /* cleanup and return */
1376 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1378 && copy_to_user (ctl->data, buf, size) != 0)
1385 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1387 struct usbdevfs_ioctl ctrl;
1389 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1391 return proc_ioctl(ps, &ctrl);
1394 #ifdef CONFIG_COMPAT
1395 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1397 struct usbdevfs_ioctl32 __user *uioc;
1398 struct usbdevfs_ioctl ctrl;
1401 uioc = compat_ptr((long)arg);
1402 if (get_user(ctrl.ifno, &uioc->ifno) ||
1403 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1404 __get_user(udata, &uioc->data))
1406 ctrl.data = compat_ptr(udata);
1408 return proc_ioctl(ps, &ctrl);
1413 * NOTE: All requests here that have interface numbers as parameters
1414 * are assuming that somehow the configuration has been prevented from
1415 * changing. But there's no mechanism to ensure that...
1417 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1419 struct dev_state *ps = file->private_data;
1420 struct usb_device *dev = ps->dev;
1421 void __user *p = (void __user *)arg;
1424 if (!(file->f_mode & FMODE_WRITE))
1426 usb_lock_device(dev);
1427 if (!connected(ps)) {
1428 usb_unlock_device(dev);
1433 case USBDEVFS_CONTROL:
1434 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1435 ret = proc_control(ps, p);
1437 inode->i_mtime = CURRENT_TIME;
1441 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1442 ret = proc_bulk(ps, p);
1444 inode->i_mtime = CURRENT_TIME;
1447 case USBDEVFS_RESETEP:
1448 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1449 ret = proc_resetep(ps, p);
1451 inode->i_mtime = CURRENT_TIME;
1454 case USBDEVFS_RESET:
1455 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1456 ret = proc_resetdevice(ps);
1459 case USBDEVFS_CLEAR_HALT:
1460 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1461 ret = proc_clearhalt(ps, p);
1463 inode->i_mtime = CURRENT_TIME;
1466 case USBDEVFS_GETDRIVER:
1467 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1468 ret = proc_getdriver(ps, p);
1471 case USBDEVFS_CONNECTINFO:
1472 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1473 ret = proc_connectinfo(ps, p);
1476 case USBDEVFS_SETINTERFACE:
1477 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1478 ret = proc_setintf(ps, p);
1481 case USBDEVFS_SETCONFIGURATION:
1482 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1483 ret = proc_setconfig(ps, p);
1486 case USBDEVFS_SUBMITURB:
1487 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1488 ret = proc_submiturb(ps, p);
1490 inode->i_mtime = CURRENT_TIME;
1493 #ifdef CONFIG_COMPAT
1495 case USBDEVFS_SUBMITURB32:
1496 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1497 ret = proc_submiturb_compat(ps, p);
1499 inode->i_mtime = CURRENT_TIME;
1502 case USBDEVFS_REAPURB32:
1503 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1504 ret = proc_reapurb_compat(ps, p);
1507 case USBDEVFS_REAPURBNDELAY32:
1508 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1509 ret = proc_reapurbnonblock_compat(ps, p);
1512 case USBDEVFS_IOCTL32:
1513 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1514 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1518 case USBDEVFS_DISCARDURB:
1519 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1520 ret = proc_unlinkurb(ps, p);
1523 case USBDEVFS_REAPURB:
1524 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1525 ret = proc_reapurb(ps, p);
1528 case USBDEVFS_REAPURBNDELAY:
1529 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1530 ret = proc_reapurbnonblock(ps, p);
1533 case USBDEVFS_DISCSIGNAL:
1534 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1535 ret = proc_disconnectsignal(ps, p);
1538 case USBDEVFS_CLAIMINTERFACE:
1539 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1540 ret = proc_claiminterface(ps, p);
1543 case USBDEVFS_RELEASEINTERFACE:
1544 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1545 ret = proc_releaseinterface(ps, p);
1548 case USBDEVFS_IOCTL:
1549 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1550 ret = proc_ioctl_default(ps, p);
1553 usb_unlock_device(dev);
1555 inode->i_atime = CURRENT_TIME;
1559 /* No kernel lock - fine */
1560 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1562 struct dev_state *ps = file->private_data;
1563 unsigned int mask = 0;
1565 poll_wait(file, &ps->wait, wait);
1566 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1567 mask |= POLLOUT | POLLWRNORM;
1569 mask |= POLLERR | POLLHUP;
1573 const struct file_operations usbfs_device_file_operations = {
1574 .llseek = usbdev_lseek,
1575 .read = usbdev_read,
1576 .poll = usbdev_poll,
1577 .ioctl = usbdev_ioctl,
1578 .open = usbdev_open,
1579 .release = usbdev_release,
1582 static int usbdev_add(struct usb_device *dev)
1584 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1586 dev->usbfs_dev = device_create(usb_device_class, &dev->dev,
1587 MKDEV(USB_DEVICE_MAJOR, minor),
1588 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1589 if (IS_ERR(dev->usbfs_dev))
1590 return PTR_ERR(dev->usbfs_dev);
1592 dev->usbfs_dev->platform_data = dev;
1596 static void usbdev_remove(struct usb_device *dev)
1598 device_unregister(dev->usbfs_dev);
1601 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1605 case USB_DEVICE_ADD:
1606 if (usbdev_add(dev))
1609 case USB_DEVICE_REMOVE:
1616 static struct notifier_block usbdev_nb = {
1617 .notifier_call = usbdev_notify,
1620 static struct cdev usb_device_cdev = {
1621 .kobj = {.name = "usb_device", },
1622 .owner = THIS_MODULE,
1625 int __init usbdev_init(void)
1629 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1632 err("unable to register minors for usb_device");
1635 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1636 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1638 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1641 usb_device_class = class_create(THIS_MODULE, "usb_device");
1642 if (IS_ERR(usb_device_class)) {
1643 err("unable to register usb_device class");
1644 retval = PTR_ERR(usb_device_class);
1648 usb_register_notify(&usbdev_nb);
1654 usb_device_class = NULL;
1655 cdev_del(&usb_device_cdev);
1658 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1662 void usbdev_cleanup(void)
1664 usb_unregister_notify(&usbdev_nb);
1665 class_destroy(usb_device_class);
1666 cdev_del(&usb_device_cdev);
1667 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);