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 <asm/uaccess.h>
50 #include <asm/byteorder.h>
51 #include <linux/moduleparam.h>
53 #include "hcd.h" /* for usbcore internals */
57 #define USB_DEVICE_MAX USB_MAXBUS * 128
58 static struct class *usb_device_class;
61 struct list_head asynclist;
67 void __user *userbuffer;
72 static int usbfs_snoop = 0;
73 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
74 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
76 #define snoop(dev, format, arg...) \
79 dev_info( dev , format , ## arg); \
82 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
85 #define MAX_USBFS_BUFFER_SIZE 16384
87 static inline int connected (struct usb_device *dev)
89 return dev->state != USB_STATE_NOTATTACHED;
92 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
100 file->f_pos = offset;
104 file->f_pos += offset;
116 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
118 struct dev_state *ps = (struct dev_state *)file->private_data;
119 struct usb_device *dev = ps->dev;
126 usb_lock_device(dev);
127 if (!connected(dev)) {
130 } else if (pos < 0) {
135 if (pos < sizeof(struct usb_device_descriptor)) {
136 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
141 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
142 le16_to_cpus(&desc->bcdUSB);
143 le16_to_cpus(&desc->idVendor);
144 le16_to_cpus(&desc->idProduct);
145 le16_to_cpus(&desc->bcdDevice);
147 len = sizeof(struct usb_device_descriptor) - pos;
150 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
163 pos = sizeof(struct usb_device_descriptor);
164 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
165 struct usb_config_descriptor *config =
166 (struct usb_config_descriptor *)dev->rawdescriptors[i];
167 unsigned int length = le16_to_cpu(config->wTotalLength);
169 if (*ppos < pos + length) {
171 /* The descriptor may claim to be longer than it
172 * really is. Here is the actual allocated length. */
174 le16_to_cpu(dev->config[i].desc.wTotalLength);
176 len = length - (*ppos - pos);
180 /* Simply don't write (skip over) unallocated parts */
181 if (alloclen > (*ppos - pos)) {
182 alloclen -= (*ppos - pos);
183 if (copy_to_user(buf,
184 dev->rawdescriptors[i] + (*ppos - pos),
185 min(len, alloclen))) {
201 usb_unlock_device(dev);
206 * async list handling
209 static struct async *alloc_async(unsigned int numisoframes)
211 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
212 struct async *as = kmalloc(assize, GFP_KERNEL);
215 memset(as, 0, assize);
216 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
224 static void free_async(struct async *as)
226 kfree(as->urb->transfer_buffer);
227 kfree(as->urb->setup_packet);
228 usb_free_urb(as->urb);
232 static inline void async_newpending(struct async *as)
234 struct dev_state *ps = as->ps;
237 spin_lock_irqsave(&ps->lock, flags);
238 list_add_tail(&as->asynclist, &ps->async_pending);
239 spin_unlock_irqrestore(&ps->lock, flags);
242 static inline void async_removepending(struct async *as)
244 struct dev_state *ps = as->ps;
247 spin_lock_irqsave(&ps->lock, flags);
248 list_del_init(&as->asynclist);
249 spin_unlock_irqrestore(&ps->lock, flags);
252 static inline struct async *async_getcompleted(struct dev_state *ps)
255 struct async *as = NULL;
257 spin_lock_irqsave(&ps->lock, flags);
258 if (!list_empty(&ps->async_completed)) {
259 as = list_entry(ps->async_completed.next, struct async, asynclist);
260 list_del_init(&as->asynclist);
262 spin_unlock_irqrestore(&ps->lock, flags);
266 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
271 spin_lock_irqsave(&ps->lock, flags);
272 list_for_each_entry(as, &ps->async_pending, asynclist)
273 if (as->userurb == userurb) {
274 list_del_init(&as->asynclist);
275 spin_unlock_irqrestore(&ps->lock, flags);
278 spin_unlock_irqrestore(&ps->lock, flags);
282 static void async_completed(struct urb *urb, struct pt_regs *regs)
284 struct async *as = (struct async *)urb->context;
285 struct dev_state *ps = as->ps;
286 struct siginfo sinfo;
288 spin_lock(&ps->lock);
289 list_move_tail(&as->asynclist, &ps->async_completed);
290 spin_unlock(&ps->lock);
292 sinfo.si_signo = as->signr;
293 sinfo.si_errno = as->urb->status;
294 sinfo.si_code = SI_ASYNCIO;
295 sinfo.si_addr = as->userurb;
296 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
302 static void destroy_async (struct dev_state *ps, struct list_head *list)
307 spin_lock_irqsave(&ps->lock, flags);
308 while (!list_empty(list)) {
309 as = list_entry(list->next, struct async, asynclist);
310 list_del_init(&as->asynclist);
312 /* drop the spinlock so the completion handler can run */
313 spin_unlock_irqrestore(&ps->lock, flags);
314 usb_kill_urb(as->urb);
315 spin_lock_irqsave(&ps->lock, flags);
317 spin_unlock_irqrestore(&ps->lock, flags);
318 as = async_getcompleted(ps);
321 as = async_getcompleted(ps);
325 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
327 struct list_head *p, *q, hitlist;
330 INIT_LIST_HEAD(&hitlist);
331 spin_lock_irqsave(&ps->lock, flags);
332 list_for_each_safe(p, q, &ps->async_pending)
333 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
334 list_move_tail(p, &hitlist);
335 spin_unlock_irqrestore(&ps->lock, flags);
336 destroy_async(ps, &hitlist);
339 static inline void destroy_all_async(struct dev_state *ps)
341 destroy_async(ps, &ps->async_pending);
345 * interface claims are made only at the request of user level code,
346 * which can also release them (explicitly or by closing files).
347 * they're also undone when devices disconnect.
350 static int driver_probe (struct usb_interface *intf,
351 const struct usb_device_id *id)
356 static void driver_disconnect(struct usb_interface *intf)
358 struct dev_state *ps = usb_get_intfdata (intf);
359 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
364 /* NOTE: this relies on usbcore having canceled and completed
365 * all pending I/O requests; 2.6 does that.
368 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
369 clear_bit(ifnum, &ps->ifclaimed);
371 warn("interface number %u out of range", ifnum);
373 usb_set_intfdata (intf, NULL);
375 /* force async requests to complete */
376 destroy_async_on_interface(ps, ifnum);
379 struct usb_driver usbfs_driver = {
380 .owner = THIS_MODULE,
382 .probe = driver_probe,
383 .disconnect = driver_disconnect,
386 static int claimintf(struct dev_state *ps, unsigned int ifnum)
388 struct usb_device *dev = ps->dev;
389 struct usb_interface *intf;
392 if (ifnum >= 8*sizeof(ps->ifclaimed))
394 /* already claimed */
395 if (test_bit(ifnum, &ps->ifclaimed))
398 /* lock against other changes to driver bindings */
399 down_write(&usb_bus_type.subsys.rwsem);
400 intf = usb_ifnum_to_if(dev, ifnum);
404 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
405 up_write(&usb_bus_type.subsys.rwsem);
407 set_bit(ifnum, &ps->ifclaimed);
411 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
413 struct usb_device *dev;
414 struct usb_interface *intf;
418 if (ifnum >= 8*sizeof(ps->ifclaimed))
421 /* lock against other changes to driver bindings */
422 down_write(&usb_bus_type.subsys.rwsem);
423 intf = usb_ifnum_to_if(dev, ifnum);
426 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
427 usb_driver_release_interface(&usbfs_driver, intf);
430 up_write(&usb_bus_type.subsys.rwsem);
434 static int checkintf(struct dev_state *ps, unsigned int ifnum)
436 if (ps->dev->state != USB_STATE_CONFIGURED)
437 return -EHOSTUNREACH;
438 if (ifnum >= 8*sizeof(ps->ifclaimed))
440 if (test_bit(ifnum, &ps->ifclaimed))
442 /* if not yet claimed, claim it for the driver */
443 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
444 current->pid, current->comm, ifnum);
445 return claimintf(ps, ifnum);
448 static int findintfep(struct usb_device *dev, unsigned int ep)
450 unsigned int i, j, e;
451 struct usb_interface *intf;
452 struct usb_host_interface *alts;
453 struct usb_endpoint_descriptor *endpt;
455 if (ep & ~(USB_DIR_IN|0xf))
459 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
460 intf = dev->actconfig->interface[i];
461 for (j = 0; j < intf->num_altsetting; j++) {
462 alts = &intf->altsetting[j];
463 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
464 endpt = &alts->endpoint[e].desc;
465 if (endpt->bEndpointAddress == ep)
466 return alts->desc.bInterfaceNumber;
473 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
477 if (ps->dev->state != USB_STATE_CONFIGURED)
478 return -EHOSTUNREACH;
479 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
483 switch (requesttype & USB_RECIP_MASK) {
484 case USB_RECIP_ENDPOINT:
485 if ((ret = findintfep(ps->dev, index)) >= 0)
486 ret = checkintf(ps, ret);
489 case USB_RECIP_INTERFACE:
490 ret = checkintf(ps, index);
499 static int usbdev_open(struct inode *inode, struct file *file)
501 struct usb_device *dev = NULL;
502 struct dev_state *ps;
506 * no locking necessary here, as chrdev_open has the kernel lock
507 * (still acquire the kernel lock for safety)
510 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
515 /* check if we are called from a real node or usbfs */
516 if (imajor(inode) == USB_DEVICE_MAJOR)
517 dev = usbdev_lookup_minor(iminor(inode));
519 dev = inode->u.generic_ip;
528 spin_lock_init(&ps->lock);
529 INIT_LIST_HEAD(&ps->async_pending);
530 INIT_LIST_HEAD(&ps->async_completed);
531 init_waitqueue_head(&ps->wait);
533 ps->disctask = current;
534 ps->disccontext = NULL;
537 list_add_tail(&ps->list, &dev->filelist);
538 file->private_data = ps;
545 static int usbdev_release(struct inode *inode, struct file *file)
547 struct dev_state *ps = (struct dev_state *)file->private_data;
548 struct usb_device *dev = ps->dev;
551 usb_lock_device(dev);
552 list_del_init(&ps->list);
553 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
555 if (test_bit(ifnum, &ps->ifclaimed))
556 releaseintf(ps, ifnum);
558 destroy_all_async(ps);
559 usb_unlock_device(dev);
566 static int proc_control(struct dev_state *ps, void __user *arg)
568 struct usb_device *dev = ps->dev;
569 struct usbdevfs_ctrltransfer ctrl;
574 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
576 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
578 if (ctrl.wLength > PAGE_SIZE)
580 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
583 if (ctrl.bRequestType & 0x80) {
584 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
585 free_page((unsigned long)tbuf);
588 snoop(&dev->dev, "control read: bRequest=%02x "
589 "bRrequestType=%02x wValue=%04x "
590 "wIndex=%04x wLength=%04x\n",
591 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
592 ctrl.wIndex, ctrl.wLength);
594 usb_unlock_device(dev);
595 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
596 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
597 usb_lock_device(dev);
598 if ((i > 0) && ctrl.wLength) {
600 dev_info(&dev->dev, "control read: data ");
601 for (j = 0; j < i; ++j)
602 printk ("%02x ", (unsigned char)(tbuf)[j]);
605 if (copy_to_user(ctrl.data, tbuf, i)) {
606 free_page((unsigned long)tbuf);
612 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
613 free_page((unsigned long)tbuf);
617 snoop(&dev->dev, "control write: bRequest=%02x "
618 "bRrequestType=%02x wValue=%04x "
619 "wIndex=%04x wLength=%04x\n",
620 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
621 ctrl.wIndex, ctrl.wLength);
623 dev_info(&dev->dev, "control write: data: ");
624 for (j = 0; j < ctrl.wLength; ++j)
625 printk ("%02x ", (unsigned char)(tbuf)[j]);
628 usb_unlock_device(dev);
629 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
630 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
631 usb_lock_device(dev);
633 free_page((unsigned long)tbuf);
634 if (i<0 && i != -EPIPE) {
635 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
636 "failed cmd %s rqt %u rq %u len %u ret %d\n",
637 current->comm, ctrl.bRequestType, ctrl.bRequest,
643 static int proc_bulk(struct dev_state *ps, void __user *arg)
645 struct usb_device *dev = ps->dev;
646 struct usbdevfs_bulktransfer bulk;
647 unsigned int tmo, len1, pipe;
652 if (copy_from_user(&bulk, arg, sizeof(bulk)))
654 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
656 if ((ret = checkintf(ps, ret)))
658 if (bulk.ep & USB_DIR_IN)
659 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
661 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
662 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
665 if (len1 > MAX_USBFS_BUFFER_SIZE)
667 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
670 if (bulk.ep & 0x80) {
671 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
675 usb_unlock_device(dev);
676 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
677 usb_lock_device(dev);
679 if (copy_to_user(bulk.data, tbuf, len2)) {
686 if (copy_from_user(tbuf, bulk.data, len1)) {
691 usb_unlock_device(dev);
692 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
693 usb_lock_device(dev);
701 static int proc_resetep(struct dev_state *ps, void __user *arg)
706 if (get_user(ep, (unsigned int __user *)arg))
708 if ((ret = findintfep(ps->dev, ep)) < 0)
710 if ((ret = checkintf(ps, ret)))
712 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
716 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
722 if (get_user(ep, (unsigned int __user *)arg))
724 if ((ret = findintfep(ps->dev, ep)) < 0)
726 if ((ret = checkintf(ps, ret)))
729 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
731 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
733 return usb_clear_halt(ps->dev, pipe);
737 static int proc_getdriver(struct dev_state *ps, void __user *arg)
739 struct usbdevfs_getdriver gd;
740 struct usb_interface *intf;
743 if (copy_from_user(&gd, arg, sizeof(gd)))
745 down_read(&usb_bus_type.subsys.rwsem);
746 intf = usb_ifnum_to_if(ps->dev, gd.interface);
747 if (!intf || !intf->dev.driver)
750 strncpy(gd.driver, intf->dev.driver->name,
752 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
754 up_read(&usb_bus_type.subsys.rwsem);
758 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
760 struct usbdevfs_connectinfo ci;
762 ci.devnum = ps->dev->devnum;
763 ci.slow = ps->dev->speed == USB_SPEED_LOW;
764 if (copy_to_user(arg, &ci, sizeof(ci)))
769 static int proc_resetdevice(struct dev_state *ps)
771 return usb_reset_device(ps->dev);
775 static int proc_setintf(struct dev_state *ps, void __user *arg)
777 struct usbdevfs_setinterface setintf;
780 if (copy_from_user(&setintf, arg, sizeof(setintf)))
782 if ((ret = checkintf(ps, setintf.interface)))
784 return usb_set_interface(ps->dev, setintf.interface,
788 static int proc_setconfig(struct dev_state *ps, void __user *arg)
792 struct usb_host_config *actconfig;
794 if (get_user(u, (unsigned int __user *)arg))
797 actconfig = ps->dev->actconfig;
799 /* Don't touch the device if any interfaces are claimed.
800 * It could interfere with other drivers' operations, and if
801 * an interface is claimed by usbfs it could easily deadlock.
806 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
807 if (usb_interface_claimed(actconfig->interface[i])) {
808 dev_warn (&ps->dev->dev,
809 "usbfs: interface %d claimed by %s "
810 "while '%s' sets config #%d\n",
811 actconfig->interface[i]
813 ->desc.bInterfaceNumber,
814 actconfig->interface[i]
823 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
824 * so avoid usb_set_configuration()'s kick to sysfs
827 if (actconfig && actconfig->desc.bConfigurationValue == u)
828 status = usb_reset_configuration(ps->dev);
830 status = usb_set_configuration(ps->dev, u);
837 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
838 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
841 struct usbdevfs_iso_packet_desc *isopkt = NULL;
842 struct usb_host_endpoint *ep;
844 struct usb_ctrlrequest *dr = NULL;
845 unsigned int u, totlen, isofrmlen;
846 int ret, interval = 0, ifnum = -1;
848 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
849 URB_NO_FSBR|URB_ZERO_PACKET))
853 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
855 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
856 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
858 if ((ret = checkintf(ps, ifnum)))
861 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
862 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
864 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
868 case USBDEVFS_URB_TYPE_CONTROL:
869 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
870 != USB_ENDPOINT_XFER_CONTROL)
872 /* min 8 byte setup packet, max arbitrary */
873 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
875 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
877 if (copy_from_user(dr, uurb->buffer, 8)) {
881 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
885 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
889 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
890 uurb->number_of_packets = 0;
891 uurb->buffer_length = le16_to_cpup(&dr->wLength);
893 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
899 case USBDEVFS_URB_TYPE_BULK:
900 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
901 case USB_ENDPOINT_XFER_CONTROL:
902 case USB_ENDPOINT_XFER_ISOC:
904 /* allow single-shot interrupt transfers, at bogus rates */
906 uurb->number_of_packets = 0;
907 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
909 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
913 case USBDEVFS_URB_TYPE_ISO:
914 /* arbitrary limit */
915 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
917 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
918 != USB_ENDPOINT_XFER_ISOC)
920 interval = 1 << min (15, ep->desc.bInterval - 1);
921 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
922 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
924 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
928 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
929 if (isopkt[u].length > 1023) {
933 totlen += isopkt[u].length;
935 if (totlen > 32768) {
939 uurb->buffer_length = totlen;
942 case USBDEVFS_URB_TYPE_INTERRUPT:
943 uurb->number_of_packets = 0;
944 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
945 != USB_ENDPOINT_XFER_INT)
947 if (ps->dev->speed == USB_SPEED_HIGH)
948 interval = 1 << min (15, ep->desc.bInterval - 1);
950 interval = ep->desc.bInterval;
951 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
953 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
960 if (!(as = alloc_async(uurb->number_of_packets))) {
965 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
971 as->urb->dev = ps->dev;
972 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
973 as->urb->transfer_flags = uurb->flags;
974 as->urb->transfer_buffer_length = uurb->buffer_length;
975 as->urb->setup_packet = (unsigned char*)dr;
976 as->urb->start_frame = uurb->start_frame;
977 as->urb->number_of_packets = uurb->number_of_packets;
978 as->urb->interval = interval;
979 as->urb->context = as;
980 as->urb->complete = async_completed;
981 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
982 as->urb->iso_frame_desc[u].offset = totlen;
983 as->urb->iso_frame_desc[u].length = isopkt[u].length;
984 totlen += isopkt[u].length;
989 if (uurb->endpoint & USB_DIR_IN)
990 as->userbuffer = uurb->buffer;
992 as->userbuffer = NULL;
993 as->signr = uurb->signr;
995 as->pid = current->pid;
996 as->uid = current->uid;
997 as->euid = current->euid;
998 if (!(uurb->endpoint & USB_DIR_IN)) {
999 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1004 async_newpending(as);
1005 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1006 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1007 async_removepending(as);
1014 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1016 struct usbdevfs_urb uurb;
1018 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1021 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1024 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1028 as = async_getpending(ps, arg);
1031 usb_kill_urb(as->urb);
1035 static int processcompl(struct async *as, void __user * __user *arg)
1037 struct urb *urb = as->urb;
1038 struct usbdevfs_urb __user *userurb = as->userurb;
1039 void __user *addr = as->userurb;
1043 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1045 if (put_user(urb->status, &userurb->status))
1047 if (put_user(urb->actual_length, &userurb->actual_length))
1049 if (put_user(urb->error_count, &userurb->error_count))
1052 if (usb_pipeisoc(urb->pipe)) {
1053 for (i = 0; i < urb->number_of_packets; i++) {
1054 if (put_user(urb->iso_frame_desc[i].actual_length,
1055 &userurb->iso_frame_desc[i].actual_length))
1057 if (put_user(urb->iso_frame_desc[i].status,
1058 &userurb->iso_frame_desc[i].status))
1065 if (put_user(addr, (void __user * __user *)arg))
1070 static struct async* reap_as(struct dev_state *ps)
1072 DECLARE_WAITQUEUE(wait, current);
1073 struct async *as = NULL;
1074 struct usb_device *dev = ps->dev;
1076 add_wait_queue(&ps->wait, &wait);
1078 __set_current_state(TASK_INTERRUPTIBLE);
1079 if ((as = async_getcompleted(ps)))
1081 if (signal_pending(current))
1083 usb_unlock_device(dev);
1085 usb_lock_device(dev);
1087 remove_wait_queue(&ps->wait, &wait);
1088 set_current_state(TASK_RUNNING);
1092 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1094 struct async *as = reap_as(ps);
1096 return processcompl(as, (void __user * __user *)arg);
1097 if (signal_pending(current))
1102 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1106 if (!(as = async_getcompleted(ps)))
1108 return processcompl(as, (void __user * __user *)arg);
1111 #ifdef CONFIG_COMPAT
1113 static int get_urb32(struct usbdevfs_urb *kurb,
1114 struct usbdevfs_urb32 __user *uurb)
1117 if (get_user(kurb->type, &uurb->type) ||
1118 __get_user(kurb->endpoint, &uurb->endpoint) ||
1119 __get_user(kurb->status, &uurb->status) ||
1120 __get_user(kurb->flags, &uurb->flags) ||
1121 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1122 __get_user(kurb->actual_length, &uurb->actual_length) ||
1123 __get_user(kurb->start_frame, &uurb->start_frame) ||
1124 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1125 __get_user(kurb->error_count, &uurb->error_count) ||
1126 __get_user(kurb->signr, &uurb->signr))
1129 if (__get_user(uptr, &uurb->buffer))
1131 kurb->buffer = compat_ptr(uptr);
1132 if (__get_user(uptr, &uurb->buffer))
1134 kurb->usercontext = compat_ptr(uptr);
1139 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1141 struct usbdevfs_urb uurb;
1143 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1146 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1149 static int processcompl_compat(struct async *as, void __user * __user *arg)
1151 struct urb *urb = as->urb;
1152 struct usbdevfs_urb32 __user *userurb = as->userurb;
1153 void __user *addr = as->userurb;
1157 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1159 if (put_user(urb->status, &userurb->status))
1161 if (put_user(urb->actual_length, &userurb->actual_length))
1163 if (put_user(urb->error_count, &userurb->error_count))
1166 if (usb_pipeisoc(urb->pipe)) {
1167 for (i = 0; i < urb->number_of_packets; i++) {
1168 if (put_user(urb->iso_frame_desc[i].actual_length,
1169 &userurb->iso_frame_desc[i].actual_length))
1171 if (put_user(urb->iso_frame_desc[i].status,
1172 &userurb->iso_frame_desc[i].status))
1178 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1183 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1185 struct async *as = reap_as(ps);
1187 return processcompl_compat(as, (void __user * __user *)arg);
1188 if (signal_pending(current))
1193 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1197 if (!(as = async_getcompleted(ps)))
1199 return processcompl_compat(as, (void __user * __user *)arg);
1204 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1206 struct usbdevfs_disconnectsignal ds;
1208 if (copy_from_user(&ds, arg, sizeof(ds)))
1210 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1212 ps->discsignr = ds.signr;
1213 ps->disccontext = ds.context;
1217 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1221 if (get_user(ifnum, (unsigned int __user *)arg))
1223 return claimintf(ps, ifnum);
1226 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1231 if (get_user(ifnum, (unsigned int __user *)arg))
1233 if ((ret = releaseintf(ps, ifnum)) < 0)
1235 destroy_async_on_interface (ps, ifnum);
1239 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1241 struct usbdevfs_ioctl ctrl;
1245 struct usb_interface *intf = NULL;
1246 struct usb_driver *driver = NULL;
1248 /* get input parameters and alloc buffer */
1249 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1251 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1252 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1254 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1255 if (copy_from_user (buf, ctrl.data, size)) {
1260 memset (buf, 0, size);
1264 if (!connected(ps->dev)) {
1269 if (ps->dev->state != USB_STATE_CONFIGURED)
1270 retval = -EHOSTUNREACH;
1271 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1273 else switch (ctrl.ioctl_code) {
1275 /* disconnect kernel driver from interface */
1276 case USBDEVFS_DISCONNECT:
1278 down_write(&usb_bus_type.subsys.rwsem);
1279 if (intf->dev.driver) {
1280 driver = to_usb_driver(intf->dev.driver);
1281 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1282 usb_driver_release_interface(driver, intf);
1285 up_write(&usb_bus_type.subsys.rwsem);
1288 /* let kernel drivers try to (re)bind to the interface */
1289 case USBDEVFS_CONNECT:
1290 usb_unlock_device(ps->dev);
1291 usb_lock_all_devices();
1292 bus_rescan_devices(intf->dev.bus);
1293 usb_unlock_all_devices();
1294 usb_lock_device(ps->dev);
1297 /* talk directly to the interface's driver */
1299 down_read(&usb_bus_type.subsys.rwsem);
1300 if (intf->dev.driver)
1301 driver = to_usb_driver(intf->dev.driver);
1302 if (driver == NULL || driver->ioctl == NULL) {
1305 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1306 if (retval == -ENOIOCTLCMD)
1309 up_read(&usb_bus_type.subsys.rwsem);
1312 /* cleanup and return */
1314 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1316 && copy_to_user (ctrl.data, buf, size) != 0)
1324 * NOTE: All requests here that have interface numbers as parameters
1325 * are assuming that somehow the configuration has been prevented from
1326 * changing. But there's no mechanism to ensure that...
1328 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1330 struct dev_state *ps = (struct dev_state *)file->private_data;
1331 struct usb_device *dev = ps->dev;
1332 void __user *p = (void __user *)arg;
1335 if (!(file->f_mode & FMODE_WRITE))
1337 usb_lock_device(dev);
1338 if (!connected(dev)) {
1339 usb_unlock_device(dev);
1344 case USBDEVFS_CONTROL:
1345 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1346 ret = proc_control(ps, p);
1348 inode->i_mtime = CURRENT_TIME;
1352 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1353 ret = proc_bulk(ps, p);
1355 inode->i_mtime = CURRENT_TIME;
1358 case USBDEVFS_RESETEP:
1359 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1360 ret = proc_resetep(ps, p);
1362 inode->i_mtime = CURRENT_TIME;
1365 case USBDEVFS_RESET:
1366 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1367 ret = proc_resetdevice(ps);
1370 case USBDEVFS_CLEAR_HALT:
1371 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1372 ret = proc_clearhalt(ps, p);
1374 inode->i_mtime = CURRENT_TIME;
1377 case USBDEVFS_GETDRIVER:
1378 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1379 ret = proc_getdriver(ps, p);
1382 case USBDEVFS_CONNECTINFO:
1383 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1384 ret = proc_connectinfo(ps, p);
1387 case USBDEVFS_SETINTERFACE:
1388 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1389 ret = proc_setintf(ps, p);
1392 case USBDEVFS_SETCONFIGURATION:
1393 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1394 ret = proc_setconfig(ps, p);
1397 case USBDEVFS_SUBMITURB:
1398 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1399 ret = proc_submiturb(ps, p);
1401 inode->i_mtime = CURRENT_TIME;
1404 #ifdef CONFIG_COMPAT
1406 case USBDEVFS_SUBMITURB32:
1407 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1408 ret = proc_submiturb_compat(ps, p);
1410 inode->i_mtime = CURRENT_TIME;
1413 case USBDEVFS_REAPURB32:
1414 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1415 ret = proc_reapurb_compat(ps, p);
1418 case USBDEVFS_REAPURBNDELAY32:
1419 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1420 ret = proc_reapurbnonblock_compat(ps, p);
1425 case USBDEVFS_DISCARDURB:
1426 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1427 ret = proc_unlinkurb(ps, p);
1430 case USBDEVFS_REAPURB:
1431 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1432 ret = proc_reapurb(ps, p);
1435 case USBDEVFS_REAPURBNDELAY:
1436 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1437 ret = proc_reapurbnonblock(ps, p);
1440 case USBDEVFS_DISCSIGNAL:
1441 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1442 ret = proc_disconnectsignal(ps, p);
1445 case USBDEVFS_CLAIMINTERFACE:
1446 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1447 ret = proc_claiminterface(ps, p);
1450 case USBDEVFS_RELEASEINTERFACE:
1451 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1452 ret = proc_releaseinterface(ps, p);
1455 case USBDEVFS_IOCTL:
1456 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1457 ret = proc_ioctl(ps, p);
1460 usb_unlock_device(dev);
1462 inode->i_atime = CURRENT_TIME;
1466 /* No kernel lock - fine */
1467 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1469 struct dev_state *ps = (struct dev_state *)file->private_data;
1470 unsigned int mask = 0;
1472 poll_wait(file, &ps->wait, wait);
1473 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1474 mask |= POLLOUT | POLLWRNORM;
1475 if (!connected(ps->dev))
1476 mask |= POLLERR | POLLHUP;
1480 struct file_operations usbfs_device_file_operations = {
1481 .llseek = usbdev_lseek,
1482 .read = usbdev_read,
1483 .poll = usbdev_poll,
1484 .ioctl = usbdev_ioctl,
1485 .open = usbdev_open,
1486 .release = usbdev_release,
1489 struct usb_device *usbdev_lookup_minor(int minor)
1491 struct class_device *class_dev;
1492 struct usb_device *dev = NULL;
1494 down(&usb_device_class->sem);
1495 list_for_each_entry(class_dev, &usb_device_class->children, node) {
1496 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
1497 dev = class_dev->class_data;
1501 up(&usb_device_class->sem);
1506 void usbdev_add(struct usb_device *dev)
1508 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1510 dev->class_dev = class_device_create(usb_device_class,
1511 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1512 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1514 dev->class_dev->class_data = dev;
1517 void usbdev_remove(struct usb_device *dev)
1519 class_device_unregister(dev->class_dev);
1522 static struct cdev usb_device_cdev = {
1523 .kobj = {.name = "usb_device", },
1524 .owner = THIS_MODULE,
1527 int __init usbdev_init(void)
1531 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1534 err("unable to register minors for usb_device");
1537 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1538 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1540 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1541 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1544 usb_device_class = class_create(THIS_MODULE, "usb_device");
1545 if (IS_ERR(usb_device_class)) {
1546 err("unable to register usb_device class");
1547 retval = PTR_ERR(usb_device_class);
1548 usb_device_class = NULL;
1549 cdev_del(&usb_device_cdev);
1550 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1557 void usbdev_cleanup(void)
1559 class_destroy(usb_device_class);
1560 cdev_del(&usb_device_cdev);
1561 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);