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 snoop_urb(struct urb *urb, void __user *userurb)
285 unsigned char *data = urb->transfer_buffer;
290 if (urb->pipe & USB_DIR_IN)
291 dev_info(&urb->dev->dev, "direction=IN\n");
293 dev_info(&urb->dev->dev, "direction=OUT\n");
294 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
295 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
296 urb->transfer_buffer_length);
297 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
298 dev_info(&urb->dev->dev, "data: ");
299 for (j = 0; j < urb->transfer_buffer_length; ++j)
300 printk ("%02x ", data[j]);
304 static void async_completed(struct urb *urb, struct pt_regs *regs)
306 struct async *as = (struct async *)urb->context;
307 struct dev_state *ps = as->ps;
308 struct siginfo sinfo;
310 spin_lock(&ps->lock);
311 list_move_tail(&as->asynclist, &ps->async_completed);
312 spin_unlock(&ps->lock);
314 sinfo.si_signo = as->signr;
315 sinfo.si_errno = as->urb->status;
316 sinfo.si_code = SI_ASYNCIO;
317 sinfo.si_addr = as->userurb;
318 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
321 snoop(&urb->dev->dev, "urb complete\n");
322 snoop_urb(urb, as->userurb);
326 static void destroy_async (struct dev_state *ps, struct list_head *list)
331 spin_lock_irqsave(&ps->lock, flags);
332 while (!list_empty(list)) {
333 as = list_entry(list->next, struct async, asynclist);
334 list_del_init(&as->asynclist);
336 /* drop the spinlock so the completion handler can run */
337 spin_unlock_irqrestore(&ps->lock, flags);
338 usb_kill_urb(as->urb);
339 spin_lock_irqsave(&ps->lock, flags);
341 spin_unlock_irqrestore(&ps->lock, flags);
342 as = async_getcompleted(ps);
345 as = async_getcompleted(ps);
349 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
351 struct list_head *p, *q, hitlist;
354 INIT_LIST_HEAD(&hitlist);
355 spin_lock_irqsave(&ps->lock, flags);
356 list_for_each_safe(p, q, &ps->async_pending)
357 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
358 list_move_tail(p, &hitlist);
359 spin_unlock_irqrestore(&ps->lock, flags);
360 destroy_async(ps, &hitlist);
363 static inline void destroy_all_async(struct dev_state *ps)
365 destroy_async(ps, &ps->async_pending);
369 * interface claims are made only at the request of user level code,
370 * which can also release them (explicitly or by closing files).
371 * they're also undone when devices disconnect.
374 static int driver_probe (struct usb_interface *intf,
375 const struct usb_device_id *id)
380 static void driver_disconnect(struct usb_interface *intf)
382 struct dev_state *ps = usb_get_intfdata (intf);
383 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
388 /* NOTE: this relies on usbcore having canceled and completed
389 * all pending I/O requests; 2.6 does that.
392 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
393 clear_bit(ifnum, &ps->ifclaimed);
395 warn("interface number %u out of range", ifnum);
397 usb_set_intfdata (intf, NULL);
399 /* force async requests to complete */
400 destroy_async_on_interface(ps, ifnum);
403 struct usb_driver usbfs_driver = {
404 .owner = THIS_MODULE,
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_CONFIGURED)
502 return -EHOSTUNREACH;
503 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
507 switch (requesttype & USB_RECIP_MASK) {
508 case USB_RECIP_ENDPOINT:
509 if ((ret = findintfep(ps->dev, index)) >= 0)
510 ret = checkintf(ps, ret);
513 case USB_RECIP_INTERFACE:
514 ret = checkintf(ps, index);
523 static int usbdev_open(struct inode *inode, struct file *file)
525 struct usb_device *dev = NULL;
526 struct dev_state *ps;
530 * no locking necessary here, as chrdev_open has the kernel lock
531 * (still acquire the kernel lock for safety)
534 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
539 /* check if we are called from a real node or usbfs */
540 if (imajor(inode) == USB_DEVICE_MAJOR)
541 dev = usbdev_lookup_minor(iminor(inode));
543 dev = inode->u.generic_ip;
552 spin_lock_init(&ps->lock);
553 INIT_LIST_HEAD(&ps->async_pending);
554 INIT_LIST_HEAD(&ps->async_completed);
555 init_waitqueue_head(&ps->wait);
557 ps->disc_pid = current->pid;
558 ps->disc_uid = current->uid;
559 ps->disc_euid = current->euid;
560 ps->disccontext = NULL;
563 list_add_tail(&ps->list, &dev->filelist);
564 file->private_data = ps;
571 static int usbdev_release(struct inode *inode, struct file *file)
573 struct dev_state *ps = (struct dev_state *)file->private_data;
574 struct usb_device *dev = ps->dev;
577 usb_lock_device(dev);
578 list_del_init(&ps->list);
579 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
581 if (test_bit(ifnum, &ps->ifclaimed))
582 releaseintf(ps, ifnum);
584 destroy_all_async(ps);
585 usb_unlock_device(dev);
592 static int proc_control(struct dev_state *ps, void __user *arg)
594 struct usb_device *dev = ps->dev;
595 struct usbdevfs_ctrltransfer ctrl;
600 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
602 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
604 if (ctrl.wLength > PAGE_SIZE)
606 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
609 if (ctrl.bRequestType & 0x80) {
610 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
611 free_page((unsigned long)tbuf);
614 snoop(&dev->dev, "control read: bRequest=%02x "
615 "bRrequestType=%02x wValue=%04x "
616 "wIndex=%04x wLength=%04x\n",
617 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
618 ctrl.wIndex, ctrl.wLength);
620 usb_unlock_device(dev);
621 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
622 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
623 usb_lock_device(dev);
624 if ((i > 0) && ctrl.wLength) {
626 dev_info(&dev->dev, "control read: data ");
627 for (j = 0; j < i; ++j)
628 printk("%02x ", (unsigned char)(tbuf)[j]);
631 if (copy_to_user(ctrl.data, tbuf, i)) {
632 free_page((unsigned long)tbuf);
638 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
639 free_page((unsigned long)tbuf);
643 snoop(&dev->dev, "control write: bRequest=%02x "
644 "bRrequestType=%02x wValue=%04x "
645 "wIndex=%04x wLength=%04x\n",
646 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
647 ctrl.wIndex, ctrl.wLength);
649 dev_info(&dev->dev, "control write: data: ");
650 for (j = 0; j < ctrl.wLength; ++j)
651 printk("%02x ", (unsigned char)(tbuf)[j]);
654 usb_unlock_device(dev);
655 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
656 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
657 usb_lock_device(dev);
659 free_page((unsigned long)tbuf);
660 if (i<0 && i != -EPIPE) {
661 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
662 "failed cmd %s rqt %u rq %u len %u ret %d\n",
663 current->comm, ctrl.bRequestType, ctrl.bRequest,
669 static int proc_bulk(struct dev_state *ps, void __user *arg)
671 struct usb_device *dev = ps->dev;
672 struct usbdevfs_bulktransfer bulk;
673 unsigned int tmo, len1, pipe;
678 if (copy_from_user(&bulk, arg, sizeof(bulk)))
680 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
682 if ((ret = checkintf(ps, ret)))
684 if (bulk.ep & USB_DIR_IN)
685 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
687 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
688 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
691 if (len1 > MAX_USBFS_BUFFER_SIZE)
693 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
696 if (bulk.ep & 0x80) {
697 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
701 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
702 bulk.len, bulk.timeout);
703 usb_unlock_device(dev);
704 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
705 usb_lock_device(dev);
708 dev_info(&dev->dev, "bulk read: data ");
709 for (j = 0; j < len2; ++j)
710 printk("%02x ", (unsigned char)(tbuf)[j]);
713 if (copy_to_user(bulk.data, tbuf, len2)) {
720 if (copy_from_user(tbuf, bulk.data, len1)) {
725 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
726 bulk.len, bulk.timeout);
728 dev_info(&dev->dev, "bulk write: data: ");
729 for (j = 0; j < len1; ++j)
730 printk("%02x ", (unsigned char)(tbuf)[j]);
733 usb_unlock_device(dev);
734 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
735 usb_lock_device(dev);
743 static int proc_resetep(struct dev_state *ps, void __user *arg)
748 if (get_user(ep, (unsigned int __user *)arg))
750 if ((ret = findintfep(ps->dev, ep)) < 0)
752 if ((ret = checkintf(ps, ret)))
754 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
758 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
764 if (get_user(ep, (unsigned int __user *)arg))
766 if ((ret = findintfep(ps->dev, ep)) < 0)
768 if ((ret = checkintf(ps, ret)))
771 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
773 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
775 return usb_clear_halt(ps->dev, pipe);
779 static int proc_getdriver(struct dev_state *ps, void __user *arg)
781 struct usbdevfs_getdriver gd;
782 struct usb_interface *intf;
785 if (copy_from_user(&gd, arg, sizeof(gd)))
787 down_read(&usb_bus_type.subsys.rwsem);
788 intf = usb_ifnum_to_if(ps->dev, gd.interface);
789 if (!intf || !intf->dev.driver)
792 strncpy(gd.driver, intf->dev.driver->name,
794 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
796 up_read(&usb_bus_type.subsys.rwsem);
800 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
802 struct usbdevfs_connectinfo ci;
804 ci.devnum = ps->dev->devnum;
805 ci.slow = ps->dev->speed == USB_SPEED_LOW;
806 if (copy_to_user(arg, &ci, sizeof(ci)))
811 static int proc_resetdevice(struct dev_state *ps)
813 return usb_reset_device(ps->dev);
817 static int proc_setintf(struct dev_state *ps, void __user *arg)
819 struct usbdevfs_setinterface setintf;
822 if (copy_from_user(&setintf, arg, sizeof(setintf)))
824 if ((ret = checkintf(ps, setintf.interface)))
826 return usb_set_interface(ps->dev, setintf.interface,
830 static int proc_setconfig(struct dev_state *ps, void __user *arg)
834 struct usb_host_config *actconfig;
836 if (get_user(u, (unsigned int __user *)arg))
839 actconfig = ps->dev->actconfig;
841 /* Don't touch the device if any interfaces are claimed.
842 * It could interfere with other drivers' operations, and if
843 * an interface is claimed by usbfs it could easily deadlock.
848 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
849 if (usb_interface_claimed(actconfig->interface[i])) {
850 dev_warn (&ps->dev->dev,
851 "usbfs: interface %d claimed by %s "
852 "while '%s' sets config #%d\n",
853 actconfig->interface[i]
855 ->desc.bInterfaceNumber,
856 actconfig->interface[i]
865 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
866 * so avoid usb_set_configuration()'s kick to sysfs
869 if (actconfig && actconfig->desc.bConfigurationValue == u)
870 status = usb_reset_configuration(ps->dev);
872 status = usb_set_configuration(ps->dev, u);
878 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
879 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
882 struct usbdevfs_iso_packet_desc *isopkt = NULL;
883 struct usb_host_endpoint *ep;
885 struct usb_ctrlrequest *dr = NULL;
886 unsigned int u, totlen, isofrmlen;
887 int ret, interval = 0, ifnum = -1;
889 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
890 URB_NO_FSBR|URB_ZERO_PACKET))
894 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
896 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
897 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
899 if ((ret = checkintf(ps, ifnum)))
902 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
903 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
905 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
909 case USBDEVFS_URB_TYPE_CONTROL:
910 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
911 != USB_ENDPOINT_XFER_CONTROL)
913 /* min 8 byte setup packet, max arbitrary */
914 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
916 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
918 if (copy_from_user(dr, uurb->buffer, 8)) {
922 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
926 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
930 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
931 uurb->number_of_packets = 0;
932 uurb->buffer_length = le16_to_cpup(&dr->wLength);
934 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
938 snoop(&ps->dev->dev, "control urb\n");
941 case USBDEVFS_URB_TYPE_BULK:
942 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
943 case USB_ENDPOINT_XFER_CONTROL:
944 case USB_ENDPOINT_XFER_ISOC:
946 /* allow single-shot interrupt transfers, at bogus rates */
948 uurb->number_of_packets = 0;
949 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
951 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
953 snoop(&ps->dev->dev, "bulk urb\n");
956 case USBDEVFS_URB_TYPE_ISO:
957 /* arbitrary limit */
958 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
960 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
961 != USB_ENDPOINT_XFER_ISOC)
963 interval = 1 << min (15, ep->desc.bInterval - 1);
964 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
965 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
967 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
971 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
972 if (isopkt[u].length > 1023) {
976 totlen += isopkt[u].length;
978 if (totlen > 32768) {
982 uurb->buffer_length = totlen;
983 snoop(&ps->dev->dev, "iso urb\n");
986 case USBDEVFS_URB_TYPE_INTERRUPT:
987 uurb->number_of_packets = 0;
988 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
989 != USB_ENDPOINT_XFER_INT)
991 if (ps->dev->speed == USB_SPEED_HIGH)
992 interval = 1 << min (15, ep->desc.bInterval - 1);
994 interval = ep->desc.bInterval;
995 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
997 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
999 snoop(&ps->dev->dev, "interrupt urb\n");
1005 if (!(as = alloc_async(uurb->number_of_packets))) {
1010 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1016 as->urb->dev = ps->dev;
1017 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1018 as->urb->transfer_flags = uurb->flags;
1019 as->urb->transfer_buffer_length = uurb->buffer_length;
1020 as->urb->setup_packet = (unsigned char*)dr;
1021 as->urb->start_frame = uurb->start_frame;
1022 as->urb->number_of_packets = uurb->number_of_packets;
1023 as->urb->interval = interval;
1024 as->urb->context = as;
1025 as->urb->complete = async_completed;
1026 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1027 as->urb->iso_frame_desc[u].offset = totlen;
1028 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1029 totlen += isopkt[u].length;
1034 if (uurb->endpoint & USB_DIR_IN)
1035 as->userbuffer = uurb->buffer;
1037 as->userbuffer = NULL;
1038 as->signr = uurb->signr;
1040 as->pid = current->pid;
1041 as->uid = current->uid;
1042 as->euid = current->euid;
1043 if (!(uurb->endpoint & USB_DIR_IN)) {
1044 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1049 snoop(&as->urb->dev->dev, "submit urb\n");
1050 snoop_urb(as->urb, as->userurb);
1051 async_newpending(as);
1052 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1053 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1054 async_removepending(as);
1061 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1063 struct usbdevfs_urb uurb;
1065 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1068 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1071 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1075 as = async_getpending(ps, arg);
1078 usb_kill_urb(as->urb);
1082 static int processcompl(struct async *as, void __user * __user *arg)
1084 struct urb *urb = as->urb;
1085 struct usbdevfs_urb __user *userurb = as->userurb;
1086 void __user *addr = as->userurb;
1090 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1092 if (put_user(urb->status, &userurb->status))
1094 if (put_user(urb->actual_length, &userurb->actual_length))
1096 if (put_user(urb->error_count, &userurb->error_count))
1099 if (usb_pipeisoc(urb->pipe)) {
1100 for (i = 0; i < urb->number_of_packets; i++) {
1101 if (put_user(urb->iso_frame_desc[i].actual_length,
1102 &userurb->iso_frame_desc[i].actual_length))
1104 if (put_user(urb->iso_frame_desc[i].status,
1105 &userurb->iso_frame_desc[i].status))
1112 if (put_user(addr, (void __user * __user *)arg))
1117 static struct async* reap_as(struct dev_state *ps)
1119 DECLARE_WAITQUEUE(wait, current);
1120 struct async *as = NULL;
1121 struct usb_device *dev = ps->dev;
1123 add_wait_queue(&ps->wait, &wait);
1125 __set_current_state(TASK_INTERRUPTIBLE);
1126 if ((as = async_getcompleted(ps)))
1128 if (signal_pending(current))
1130 usb_unlock_device(dev);
1132 usb_lock_device(dev);
1134 remove_wait_queue(&ps->wait, &wait);
1135 set_current_state(TASK_RUNNING);
1139 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1141 struct async *as = reap_as(ps);
1143 return processcompl(as, (void __user * __user *)arg);
1144 if (signal_pending(current))
1149 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1153 if (!(as = async_getcompleted(ps)))
1155 return processcompl(as, (void __user * __user *)arg);
1158 #ifdef CONFIG_COMPAT
1160 static int get_urb32(struct usbdevfs_urb *kurb,
1161 struct usbdevfs_urb32 __user *uurb)
1164 if (get_user(kurb->type, &uurb->type) ||
1165 __get_user(kurb->endpoint, &uurb->endpoint) ||
1166 __get_user(kurb->status, &uurb->status) ||
1167 __get_user(kurb->flags, &uurb->flags) ||
1168 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1169 __get_user(kurb->actual_length, &uurb->actual_length) ||
1170 __get_user(kurb->start_frame, &uurb->start_frame) ||
1171 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1172 __get_user(kurb->error_count, &uurb->error_count) ||
1173 __get_user(kurb->signr, &uurb->signr))
1176 if (__get_user(uptr, &uurb->buffer))
1178 kurb->buffer = compat_ptr(uptr);
1179 if (__get_user(uptr, &uurb->buffer))
1181 kurb->usercontext = compat_ptr(uptr);
1186 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1188 struct usbdevfs_urb uurb;
1190 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1193 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1196 static int processcompl_compat(struct async *as, void __user * __user *arg)
1198 struct urb *urb = as->urb;
1199 struct usbdevfs_urb32 __user *userurb = as->userurb;
1200 void __user *addr = as->userurb;
1204 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1206 if (put_user(urb->status, &userurb->status))
1208 if (put_user(urb->actual_length, &userurb->actual_length))
1210 if (put_user(urb->error_count, &userurb->error_count))
1213 if (usb_pipeisoc(urb->pipe)) {
1214 for (i = 0; i < urb->number_of_packets; i++) {
1215 if (put_user(urb->iso_frame_desc[i].actual_length,
1216 &userurb->iso_frame_desc[i].actual_length))
1218 if (put_user(urb->iso_frame_desc[i].status,
1219 &userurb->iso_frame_desc[i].status))
1225 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1230 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1232 struct async *as = reap_as(ps);
1234 return processcompl_compat(as, (void __user * __user *)arg);
1235 if (signal_pending(current))
1240 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1244 if (!(as = async_getcompleted(ps)))
1246 return processcompl_compat(as, (void __user * __user *)arg);
1251 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1253 struct usbdevfs_disconnectsignal ds;
1255 if (copy_from_user(&ds, arg, sizeof(ds)))
1257 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1259 ps->discsignr = ds.signr;
1260 ps->disccontext = ds.context;
1264 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1268 if (get_user(ifnum, (unsigned int __user *)arg))
1270 return claimintf(ps, ifnum);
1273 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1278 if (get_user(ifnum, (unsigned int __user *)arg))
1280 if ((ret = releaseintf(ps, ifnum)) < 0)
1282 destroy_async_on_interface (ps, ifnum);
1286 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1288 struct usbdevfs_ioctl ctrl;
1292 struct usb_interface *intf = NULL;
1293 struct usb_driver *driver = NULL;
1295 /* get input parameters and alloc buffer */
1296 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1298 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1299 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1301 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1302 if (copy_from_user (buf, ctrl.data, size)) {
1307 memset (buf, 0, size);
1311 if (!connected(ps->dev)) {
1316 if (ps->dev->state != USB_STATE_CONFIGURED)
1317 retval = -EHOSTUNREACH;
1318 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1320 else switch (ctrl.ioctl_code) {
1322 /* disconnect kernel driver from interface */
1323 case USBDEVFS_DISCONNECT:
1325 down_write(&usb_bus_type.subsys.rwsem);
1326 if (intf->dev.driver) {
1327 driver = to_usb_driver(intf->dev.driver);
1328 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1329 usb_driver_release_interface(driver, intf);
1332 up_write(&usb_bus_type.subsys.rwsem);
1335 /* let kernel drivers try to (re)bind to the interface */
1336 case USBDEVFS_CONNECT:
1337 usb_unlock_device(ps->dev);
1338 usb_lock_all_devices();
1339 bus_rescan_devices(intf->dev.bus);
1340 usb_unlock_all_devices();
1341 usb_lock_device(ps->dev);
1344 /* talk directly to the interface's driver */
1346 down_read(&usb_bus_type.subsys.rwsem);
1347 if (intf->dev.driver)
1348 driver = to_usb_driver(intf->dev.driver);
1349 if (driver == NULL || driver->ioctl == NULL) {
1352 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1353 if (retval == -ENOIOCTLCMD)
1356 up_read(&usb_bus_type.subsys.rwsem);
1359 /* cleanup and return */
1361 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1363 && copy_to_user (ctrl.data, buf, size) != 0)
1371 * NOTE: All requests here that have interface numbers as parameters
1372 * are assuming that somehow the configuration has been prevented from
1373 * changing. But there's no mechanism to ensure that...
1375 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1377 struct dev_state *ps = (struct dev_state *)file->private_data;
1378 struct usb_device *dev = ps->dev;
1379 void __user *p = (void __user *)arg;
1382 if (!(file->f_mode & FMODE_WRITE))
1384 usb_lock_device(dev);
1385 if (!connected(dev)) {
1386 usb_unlock_device(dev);
1391 case USBDEVFS_CONTROL:
1392 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1393 ret = proc_control(ps, p);
1395 inode->i_mtime = CURRENT_TIME;
1399 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1400 ret = proc_bulk(ps, p);
1402 inode->i_mtime = CURRENT_TIME;
1405 case USBDEVFS_RESETEP:
1406 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1407 ret = proc_resetep(ps, p);
1409 inode->i_mtime = CURRENT_TIME;
1412 case USBDEVFS_RESET:
1413 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1414 ret = proc_resetdevice(ps);
1417 case USBDEVFS_CLEAR_HALT:
1418 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1419 ret = proc_clearhalt(ps, p);
1421 inode->i_mtime = CURRENT_TIME;
1424 case USBDEVFS_GETDRIVER:
1425 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1426 ret = proc_getdriver(ps, p);
1429 case USBDEVFS_CONNECTINFO:
1430 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1431 ret = proc_connectinfo(ps, p);
1434 case USBDEVFS_SETINTERFACE:
1435 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1436 ret = proc_setintf(ps, p);
1439 case USBDEVFS_SETCONFIGURATION:
1440 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1441 ret = proc_setconfig(ps, p);
1444 case USBDEVFS_SUBMITURB:
1445 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1446 ret = proc_submiturb(ps, p);
1448 inode->i_mtime = CURRENT_TIME;
1451 #ifdef CONFIG_COMPAT
1453 case USBDEVFS_SUBMITURB32:
1454 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1455 ret = proc_submiturb_compat(ps, p);
1457 inode->i_mtime = CURRENT_TIME;
1460 case USBDEVFS_REAPURB32:
1461 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1462 ret = proc_reapurb_compat(ps, p);
1465 case USBDEVFS_REAPURBNDELAY32:
1466 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1467 ret = proc_reapurbnonblock_compat(ps, p);
1472 case USBDEVFS_DISCARDURB:
1473 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1474 ret = proc_unlinkurb(ps, p);
1477 case USBDEVFS_REAPURB:
1478 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1479 ret = proc_reapurb(ps, p);
1482 case USBDEVFS_REAPURBNDELAY:
1483 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1484 ret = proc_reapurbnonblock(ps, p);
1487 case USBDEVFS_DISCSIGNAL:
1488 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1489 ret = proc_disconnectsignal(ps, p);
1492 case USBDEVFS_CLAIMINTERFACE:
1493 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1494 ret = proc_claiminterface(ps, p);
1497 case USBDEVFS_RELEASEINTERFACE:
1498 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1499 ret = proc_releaseinterface(ps, p);
1502 case USBDEVFS_IOCTL:
1503 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1504 ret = proc_ioctl(ps, p);
1507 usb_unlock_device(dev);
1509 inode->i_atime = CURRENT_TIME;
1513 /* No kernel lock - fine */
1514 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1516 struct dev_state *ps = (struct dev_state *)file->private_data;
1517 unsigned int mask = 0;
1519 poll_wait(file, &ps->wait, wait);
1520 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1521 mask |= POLLOUT | POLLWRNORM;
1522 if (!connected(ps->dev))
1523 mask |= POLLERR | POLLHUP;
1527 struct file_operations usbfs_device_file_operations = {
1528 .llseek = usbdev_lseek,
1529 .read = usbdev_read,
1530 .poll = usbdev_poll,
1531 .ioctl = usbdev_ioctl,
1532 .open = usbdev_open,
1533 .release = usbdev_release,
1536 struct usb_device *usbdev_lookup_minor(int minor)
1538 struct class_device *class_dev;
1539 struct usb_device *dev = NULL;
1541 down(&usb_device_class->sem);
1542 list_for_each_entry(class_dev, &usb_device_class->children, node) {
1543 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
1544 dev = class_dev->class_data;
1548 up(&usb_device_class->sem);
1553 void usbdev_add(struct usb_device *dev)
1555 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1557 dev->class_dev = class_device_create(usb_device_class, NULL,
1558 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1559 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1561 dev->class_dev->class_data = dev;
1564 void usbdev_remove(struct usb_device *dev)
1566 class_device_unregister(dev->class_dev);
1569 static struct cdev usb_device_cdev = {
1570 .kobj = {.name = "usb_device", },
1571 .owner = THIS_MODULE,
1574 int __init usbdev_init(void)
1578 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1581 err("unable to register minors for usb_device");
1584 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1585 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1587 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1588 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1591 usb_device_class = class_create(THIS_MODULE, "usb_device");
1592 if (IS_ERR(usb_device_class)) {
1593 err("unable to register usb_device class");
1594 retval = PTR_ERR(usb_device_class);
1595 usb_device_class = NULL;
1596 cdev_del(&usb_device_cdev);
1597 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1604 void usbdev_cleanup(void)
1606 class_destroy(usb_device_class);
1607 cdev_del(&usb_device_cdev);
1608 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);