1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
24 * This file implements the usbfs/x/y files, where
25 * x is the bus number and y the device number.
27 * It allows user space programs/"drivers" to communicate directly
28 * with USB devices without intervening kernel driver.
31 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
32 * 04.01.2000 0.2 Turned into its own filesystem
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/smp_lock.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <asm/uaccess.h>
47 #include <asm/byteorder.h>
48 #include <linux/moduleparam.h>
50 #include "hcd.h" /* for usbcore internals */
54 struct list_head asynclist;
56 struct task_struct *task;
59 void __user *userbuffer;
64 static int usbfs_snoop = 0;
65 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
66 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
68 #define snoop(dev, format, arg...) \
71 dev_info( dev , format , ## arg); \
75 #define MAX_USBFS_BUFFER_SIZE 16384
77 static inline int connected (struct usb_device *dev)
79 return dev->state != USB_STATE_NOTATTACHED;
82 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
94 file->f_pos += offset;
106 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
108 struct dev_state *ps = (struct dev_state *)file->private_data;
109 struct usb_device *dev = ps->dev;
116 usb_lock_device(dev);
117 if (!connected(dev)) {
120 } else if (pos < 0) {
125 if (pos < sizeof(struct usb_device_descriptor)) {
126 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
131 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
132 le16_to_cpus(&desc->bcdUSB);
133 le16_to_cpus(&desc->idVendor);
134 le16_to_cpus(&desc->idProduct);
135 le16_to_cpus(&desc->bcdDevice);
137 len = sizeof(struct usb_device_descriptor) - pos;
140 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
153 pos = sizeof(struct usb_device_descriptor);
154 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
155 struct usb_config_descriptor *config =
156 (struct usb_config_descriptor *)dev->rawdescriptors[i];
157 unsigned int length = le16_to_cpu(config->wTotalLength);
159 if (*ppos < pos + length) {
161 /* The descriptor may claim to be longer than it
162 * really is. Here is the actual allocated length. */
164 le16_to_cpu(dev->config[i].desc.wTotalLength);
166 len = length - (*ppos - pos);
170 /* Simply don't write (skip over) unallocated parts */
171 if (alloclen > (*ppos - pos)) {
172 alloclen -= (*ppos - pos);
173 if (copy_to_user(buf,
174 dev->rawdescriptors[i] + (*ppos - pos),
175 min(len, alloclen))) {
191 usb_unlock_device(dev);
196 * async list handling
199 static struct async *alloc_async(unsigned int numisoframes)
201 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
202 struct async *as = kmalloc(assize, GFP_KERNEL);
205 memset(as, 0, assize);
206 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
214 static void free_async(struct async *as)
216 if (as->urb->transfer_buffer)
217 kfree(as->urb->transfer_buffer);
218 if (as->urb->setup_packet)
219 kfree(as->urb->setup_packet);
220 usb_free_urb(as->urb);
224 static inline void async_newpending(struct async *as)
226 struct dev_state *ps = as->ps;
229 spin_lock_irqsave(&ps->lock, flags);
230 list_add_tail(&as->asynclist, &ps->async_pending);
231 spin_unlock_irqrestore(&ps->lock, flags);
234 static inline void async_removepending(struct async *as)
236 struct dev_state *ps = as->ps;
239 spin_lock_irqsave(&ps->lock, flags);
240 list_del_init(&as->asynclist);
241 spin_unlock_irqrestore(&ps->lock, flags);
244 static inline struct async *async_getcompleted(struct dev_state *ps)
247 struct async *as = NULL;
249 spin_lock_irqsave(&ps->lock, flags);
250 if (!list_empty(&ps->async_completed)) {
251 as = list_entry(ps->async_completed.next, struct async, asynclist);
252 list_del_init(&as->asynclist);
254 spin_unlock_irqrestore(&ps->lock, flags);
258 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
263 spin_lock_irqsave(&ps->lock, flags);
264 list_for_each_entry(as, &ps->async_pending, asynclist)
265 if (as->userurb == userurb) {
266 list_del_init(&as->asynclist);
267 spin_unlock_irqrestore(&ps->lock, flags);
270 spin_unlock_irqrestore(&ps->lock, flags);
274 static void async_completed(struct urb *urb, struct pt_regs *regs)
276 struct async *as = (struct async *)urb->context;
277 struct dev_state *ps = as->ps;
278 struct siginfo sinfo;
280 spin_lock(&ps->lock);
281 list_move_tail(&as->asynclist, &ps->async_completed);
282 spin_unlock(&ps->lock);
284 sinfo.si_signo = as->signr;
285 sinfo.si_errno = as->urb->status;
286 sinfo.si_code = SI_ASYNCIO;
287 sinfo.si_addr = as->userurb;
288 send_sig_info(as->signr, &sinfo, as->task);
293 static void destroy_async (struct dev_state *ps, struct list_head *list)
298 spin_lock_irqsave(&ps->lock, flags);
299 while (!list_empty(list)) {
300 as = list_entry(list->next, struct async, asynclist);
301 list_del_init(&as->asynclist);
303 /* drop the spinlock so the completion handler can run */
304 spin_unlock_irqrestore(&ps->lock, flags);
305 usb_kill_urb(as->urb);
306 spin_lock_irqsave(&ps->lock, flags);
308 spin_unlock_irqrestore(&ps->lock, flags);
309 as = async_getcompleted(ps);
312 as = async_getcompleted(ps);
316 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
318 struct list_head *p, *q, hitlist;
321 INIT_LIST_HEAD(&hitlist);
322 spin_lock_irqsave(&ps->lock, flags);
323 list_for_each_safe(p, q, &ps->async_pending)
324 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
325 list_move_tail(p, &hitlist);
326 spin_unlock_irqrestore(&ps->lock, flags);
327 destroy_async(ps, &hitlist);
330 static inline void destroy_all_async(struct dev_state *ps)
332 destroy_async(ps, &ps->async_pending);
336 * interface claims are made only at the request of user level code,
337 * which can also release them (explicitly or by closing files).
338 * they're also undone when devices disconnect.
341 static int driver_probe (struct usb_interface *intf,
342 const struct usb_device_id *id)
347 static void driver_disconnect(struct usb_interface *intf)
349 struct dev_state *ps = usb_get_intfdata (intf);
350 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
355 /* NOTE: this relies on usbcore having canceled and completed
356 * all pending I/O requests; 2.6 does that.
359 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
360 clear_bit(ifnum, &ps->ifclaimed);
362 warn("interface number %u out of range", ifnum);
364 usb_set_intfdata (intf, NULL);
366 /* force async requests to complete */
367 destroy_async_on_interface(ps, ifnum);
370 struct usb_driver usbfs_driver = {
371 .owner = THIS_MODULE,
373 .probe = driver_probe,
374 .disconnect = driver_disconnect,
377 static int claimintf(struct dev_state *ps, unsigned int ifnum)
379 struct usb_device *dev = ps->dev;
380 struct usb_interface *intf;
383 if (ifnum >= 8*sizeof(ps->ifclaimed))
385 /* already claimed */
386 if (test_bit(ifnum, &ps->ifclaimed))
389 /* lock against other changes to driver bindings */
390 down_write(&usb_bus_type.subsys.rwsem);
391 intf = usb_ifnum_to_if(dev, ifnum);
395 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
396 up_write(&usb_bus_type.subsys.rwsem);
398 set_bit(ifnum, &ps->ifclaimed);
402 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
404 struct usb_device *dev;
405 struct usb_interface *intf;
409 if (ifnum >= 8*sizeof(ps->ifclaimed))
412 /* lock against other changes to driver bindings */
413 down_write(&usb_bus_type.subsys.rwsem);
414 intf = usb_ifnum_to_if(dev, ifnum);
417 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
418 usb_driver_release_interface(&usbfs_driver, intf);
421 up_write(&usb_bus_type.subsys.rwsem);
425 static int checkintf(struct dev_state *ps, unsigned int ifnum)
427 if (ps->dev->state != USB_STATE_CONFIGURED)
428 return -EHOSTUNREACH;
429 if (ifnum >= 8*sizeof(ps->ifclaimed))
431 if (test_bit(ifnum, &ps->ifclaimed))
433 /* if not yet claimed, claim it for the driver */
434 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
435 current->pid, current->comm, ifnum);
436 return claimintf(ps, ifnum);
439 static int findintfep(struct usb_device *dev, unsigned int ep)
441 unsigned int i, j, e;
442 struct usb_interface *intf;
443 struct usb_host_interface *alts;
444 struct usb_endpoint_descriptor *endpt;
446 if (ep & ~(USB_DIR_IN|0xf))
450 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
451 intf = dev->actconfig->interface[i];
452 for (j = 0; j < intf->num_altsetting; j++) {
453 alts = &intf->altsetting[j];
454 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
455 endpt = &alts->endpoint[e].desc;
456 if (endpt->bEndpointAddress == ep)
457 return alts->desc.bInterfaceNumber;
464 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
468 if (ps->dev->state != USB_STATE_CONFIGURED)
469 return -EHOSTUNREACH;
470 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
474 switch (requesttype & USB_RECIP_MASK) {
475 case USB_RECIP_ENDPOINT:
476 if ((ret = findintfep(ps->dev, index)) >= 0)
477 ret = checkintf(ps, ret);
480 case USB_RECIP_INTERFACE:
481 ret = checkintf(ps, index);
490 static int usbdev_open(struct inode *inode, struct file *file)
492 struct usb_device *dev;
493 struct dev_state *ps;
497 * no locking necessary here, as chrdev_open has the kernel lock
498 * (still acquire the kernel lock for safety)
501 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
506 dev = usb_get_dev(inode->u.generic_ip);
514 spin_lock_init(&ps->lock);
515 INIT_LIST_HEAD(&ps->async_pending);
516 INIT_LIST_HEAD(&ps->async_completed);
517 init_waitqueue_head(&ps->wait);
519 ps->disctask = current;
520 ps->disccontext = NULL;
523 list_add_tail(&ps->list, &dev->filelist);
524 file->private_data = ps;
531 static int usbdev_release(struct inode *inode, struct file *file)
533 struct dev_state *ps = (struct dev_state *)file->private_data;
534 struct usb_device *dev = ps->dev;
537 usb_lock_device(dev);
538 list_del_init(&ps->list);
539 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
541 if (test_bit(ifnum, &ps->ifclaimed))
542 releaseintf(ps, ifnum);
544 destroy_all_async(ps);
545 usb_unlock_device(dev);
552 static int proc_control(struct dev_state *ps, void __user *arg)
554 struct usb_device *dev = ps->dev;
555 struct usbdevfs_ctrltransfer ctrl;
560 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
562 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
564 if (ctrl.wLength > PAGE_SIZE)
566 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
569 if (ctrl.bRequestType & 0x80) {
570 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
571 free_page((unsigned long)tbuf);
574 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
575 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
577 usb_unlock_device(dev);
578 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
579 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
580 usb_lock_device(dev);
581 if ((i > 0) && ctrl.wLength) {
583 dev_info(&dev->dev, "control read: data ");
584 for (j = 0; j < ctrl.wLength; ++j)
585 printk ("%02x ", (unsigned char)(tbuf)[j]);
588 if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) {
589 free_page((unsigned long)tbuf);
595 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
596 free_page((unsigned long)tbuf);
600 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n",
601 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex);
603 dev_info(&dev->dev, "control write: data: ");
604 for (j = 0; j < ctrl.wLength; ++j)
605 printk ("%02x ", (unsigned char)(tbuf)[j]);
608 usb_unlock_device(dev);
609 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
610 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
611 usb_lock_device(dev);
613 free_page((unsigned long)tbuf);
614 if (i<0 && i != -EPIPE) {
615 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
616 "failed cmd %s rqt %u rq %u len %u ret %d\n",
617 current->comm, ctrl.bRequestType, ctrl.bRequest,
623 static int proc_bulk(struct dev_state *ps, void __user *arg)
625 struct usb_device *dev = ps->dev;
626 struct usbdevfs_bulktransfer bulk;
627 unsigned int tmo, len1, pipe;
632 if (copy_from_user(&bulk, arg, sizeof(bulk)))
634 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
636 if ((ret = checkintf(ps, ret)))
638 if (bulk.ep & USB_DIR_IN)
639 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
641 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
642 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
645 if (len1 > MAX_USBFS_BUFFER_SIZE)
647 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
650 if (bulk.ep & 0x80) {
651 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
655 usb_unlock_device(dev);
656 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
657 usb_lock_device(dev);
659 if (copy_to_user(bulk.data, tbuf, len2)) {
666 if (copy_from_user(tbuf, bulk.data, len1)) {
671 usb_unlock_device(dev);
672 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
673 usb_lock_device(dev);
681 static int proc_resetep(struct dev_state *ps, void __user *arg)
686 if (get_user(ep, (unsigned int __user *)arg))
688 if ((ret = findintfep(ps->dev, ep)) < 0)
690 if ((ret = checkintf(ps, ret)))
692 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
696 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
702 if (get_user(ep, (unsigned int __user *)arg))
704 if ((ret = findintfep(ps->dev, ep)) < 0)
706 if ((ret = checkintf(ps, ret)))
709 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
711 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
713 return usb_clear_halt(ps->dev, pipe);
717 static int proc_getdriver(struct dev_state *ps, void __user *arg)
719 struct usbdevfs_getdriver gd;
720 struct usb_interface *intf;
723 if (copy_from_user(&gd, arg, sizeof(gd)))
725 down_read(&usb_bus_type.subsys.rwsem);
726 intf = usb_ifnum_to_if(ps->dev, gd.interface);
727 if (!intf || !intf->dev.driver)
730 strncpy(gd.driver, intf->dev.driver->name,
732 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
734 up_read(&usb_bus_type.subsys.rwsem);
738 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
740 struct usbdevfs_connectinfo ci;
742 ci.devnum = ps->dev->devnum;
743 ci.slow = ps->dev->speed == USB_SPEED_LOW;
744 if (copy_to_user(arg, &ci, sizeof(ci)))
749 static int proc_resetdevice(struct dev_state *ps)
751 return usb_reset_device(ps->dev);
755 static int proc_setintf(struct dev_state *ps, void __user *arg)
757 struct usbdevfs_setinterface setintf;
760 if (copy_from_user(&setintf, arg, sizeof(setintf)))
762 if ((ret = checkintf(ps, setintf.interface)))
764 return usb_set_interface(ps->dev, setintf.interface,
768 static int proc_setconfig(struct dev_state *ps, void __user *arg)
772 struct usb_host_config *actconfig;
774 if (get_user(u, (unsigned int __user *)arg))
777 actconfig = ps->dev->actconfig;
779 /* Don't touch the device if any interfaces are claimed.
780 * It could interfere with other drivers' operations, and if
781 * an interface is claimed by usbfs it could easily deadlock.
786 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
787 if (usb_interface_claimed(actconfig->interface[i])) {
788 dev_warn (&ps->dev->dev,
789 "usbfs: interface %d claimed "
790 "while '%s' sets config #%d\n",
791 actconfig->interface[i]
793 ->desc.bInterfaceNumber,
795 #if 0 /* FIXME: enable in 2.6.10 or so */
803 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
804 * so avoid usb_set_configuration()'s kick to sysfs
807 if (actconfig && actconfig->desc.bConfigurationValue == u)
808 status = usb_reset_configuration(ps->dev);
810 status = usb_set_configuration(ps->dev, u);
817 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
818 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
821 struct usbdevfs_iso_packet_desc *isopkt = NULL;
822 struct usb_host_endpoint *ep;
824 struct usb_ctrlrequest *dr = NULL;
825 unsigned int u, totlen, isofrmlen;
826 int ret, interval = 0, ifnum = -1;
828 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
829 URB_NO_FSBR|URB_ZERO_PACKET))
833 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
835 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
836 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
838 if ((ret = checkintf(ps, ifnum)))
841 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
842 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
844 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
848 case USBDEVFS_URB_TYPE_CONTROL:
849 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
850 != USB_ENDPOINT_XFER_CONTROL)
852 /* min 8 byte setup packet, max arbitrary */
853 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
855 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
857 if (copy_from_user(dr, uurb->buffer, 8)) {
861 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
865 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
869 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
870 uurb->number_of_packets = 0;
871 uurb->buffer_length = le16_to_cpup(&dr->wLength);
873 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
879 case USBDEVFS_URB_TYPE_BULK:
880 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
881 case USB_ENDPOINT_XFER_CONTROL:
882 case USB_ENDPOINT_XFER_ISOC:
884 /* allow single-shot interrupt transfers, at bogus rates */
886 uurb->number_of_packets = 0;
887 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
889 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
893 case USBDEVFS_URB_TYPE_ISO:
894 /* arbitrary limit */
895 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
897 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
898 != USB_ENDPOINT_XFER_ISOC)
900 interval = 1 << min (15, ep->desc.bInterval - 1);
901 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
902 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
904 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
908 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
909 if (isopkt[u].length > 1023) {
913 totlen += isopkt[u].length;
915 if (totlen > 32768) {
919 uurb->buffer_length = totlen;
922 case USBDEVFS_URB_TYPE_INTERRUPT:
923 uurb->number_of_packets = 0;
924 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
925 != USB_ENDPOINT_XFER_INT)
927 if (ps->dev->speed == USB_SPEED_HIGH)
928 interval = 1 << min (15, ep->desc.bInterval - 1);
930 interval = ep->desc.bInterval;
931 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
933 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
940 if (!(as = alloc_async(uurb->number_of_packets))) {
947 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
955 as->urb->dev = ps->dev;
956 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
957 as->urb->transfer_flags = uurb->flags;
958 as->urb->transfer_buffer_length = uurb->buffer_length;
959 as->urb->setup_packet = (unsigned char*)dr;
960 as->urb->start_frame = uurb->start_frame;
961 as->urb->number_of_packets = uurb->number_of_packets;
962 as->urb->interval = interval;
963 as->urb->context = as;
964 as->urb->complete = async_completed;
965 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
966 as->urb->iso_frame_desc[u].offset = totlen;
967 as->urb->iso_frame_desc[u].length = isopkt[u].length;
968 totlen += isopkt[u].length;
974 if (uurb->endpoint & USB_DIR_IN)
975 as->userbuffer = uurb->buffer;
977 as->userbuffer = NULL;
978 as->signr = uurb->signr;
981 if (!(uurb->endpoint & USB_DIR_IN)) {
982 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
987 async_newpending(as);
988 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
989 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
990 async_removepending(as);
997 static int proc_submiturb(struct dev_state *ps, void __user *arg)
999 struct usbdevfs_urb uurb;
1001 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1004 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1007 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1011 as = async_getpending(ps, arg);
1014 usb_kill_urb(as->urb);
1018 static int processcompl(struct async *as, void __user * __user *arg)
1020 struct urb *urb = as->urb;
1021 struct usbdevfs_urb __user *userurb = as->userurb;
1022 void __user *addr = as->userurb;
1026 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1028 if (put_user(urb->status, &userurb->status))
1030 if (put_user(urb->actual_length, &userurb->actual_length))
1032 if (put_user(urb->error_count, &userurb->error_count))
1035 if (!(usb_pipeisoc(urb->pipe)))
1037 for (i = 0; i < urb->number_of_packets; i++) {
1038 if (put_user(urb->iso_frame_desc[i].actual_length,
1039 &userurb->iso_frame_desc[i].actual_length))
1041 if (put_user(urb->iso_frame_desc[i].status,
1042 &userurb->iso_frame_desc[i].status))
1048 if (put_user(addr, (void __user * __user *)arg))
1053 static struct async* reap_as(struct dev_state *ps)
1055 DECLARE_WAITQUEUE(wait, current);
1056 struct async *as = NULL;
1057 struct usb_device *dev = ps->dev;
1059 add_wait_queue(&ps->wait, &wait);
1061 __set_current_state(TASK_INTERRUPTIBLE);
1062 if ((as = async_getcompleted(ps)))
1064 if (signal_pending(current))
1066 usb_unlock_device(dev);
1068 usb_lock_device(dev);
1070 remove_wait_queue(&ps->wait, &wait);
1071 set_current_state(TASK_RUNNING);
1075 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1077 struct async *as = reap_as(ps);
1079 return processcompl(as, (void __user * __user *)arg);
1080 if (signal_pending(current))
1085 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1089 if (!(as = async_getcompleted(ps)))
1091 return processcompl(as, (void __user * __user *)arg);
1094 #ifdef CONFIG_COMPAT
1096 static int get_urb32(struct usbdevfs_urb *kurb,
1097 struct usbdevfs_urb32 __user *uurb)
1100 if (get_user(kurb->type, &uurb->type) ||
1101 __get_user(kurb->endpoint, &uurb->endpoint) ||
1102 __get_user(kurb->status, &uurb->status) ||
1103 __get_user(kurb->flags, &uurb->flags) ||
1104 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1105 __get_user(kurb->actual_length, &uurb->actual_length) ||
1106 __get_user(kurb->start_frame, &uurb->start_frame) ||
1107 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1108 __get_user(kurb->error_count, &uurb->error_count) ||
1109 __get_user(kurb->signr, &uurb->signr))
1112 if (__get_user(uptr, &uurb->buffer))
1114 kurb->buffer = compat_ptr(uptr);
1115 if (__get_user(uptr, &uurb->buffer))
1117 kurb->usercontext = compat_ptr(uptr);
1122 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1124 struct usbdevfs_urb uurb;
1126 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1129 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb __user *)arg)->iso_frame_desc, arg);
1132 static int processcompl_compat(struct async *as, void __user * __user *arg)
1134 struct urb *urb = as->urb;
1135 struct usbdevfs_urb32 __user *userurb = as->userurb;
1136 void __user *addr = as->userurb;
1140 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1142 if (put_user(urb->status, &userurb->status))
1144 if (put_user(urb->actual_length, &userurb->actual_length))
1146 if (put_user(urb->error_count, &userurb->error_count))
1149 if (!(usb_pipeisoc(urb->pipe)))
1151 for (i = 0; i < urb->number_of_packets; i++) {
1152 if (put_user(urb->iso_frame_desc[i].actual_length,
1153 &userurb->iso_frame_desc[i].actual_length))
1155 if (put_user(urb->iso_frame_desc[i].status,
1156 &userurb->iso_frame_desc[i].status))
1161 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1166 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1168 struct async *as = reap_as(ps);
1170 return processcompl_compat(as, (void __user * __user *)arg);
1171 if (signal_pending(current))
1176 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1180 printk("reapurbnblock\n");
1181 if (!(as = async_getcompleted(ps)))
1183 printk("reap got as %p\n", as);
1184 return processcompl_compat(as, (void __user * __user *)arg);
1189 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1191 struct usbdevfs_disconnectsignal ds;
1193 if (copy_from_user(&ds, arg, sizeof(ds)))
1195 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1197 ps->discsignr = ds.signr;
1198 ps->disccontext = ds.context;
1202 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1206 if (get_user(ifnum, (unsigned int __user *)arg))
1208 return claimintf(ps, ifnum);
1211 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1216 if (get_user(ifnum, (unsigned int __user *)arg))
1218 if ((ret = releaseintf(ps, ifnum)) < 0)
1220 destroy_async_on_interface (ps, ifnum);
1224 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1226 struct usbdevfs_ioctl ctrl;
1230 struct usb_interface *intf = NULL;
1231 struct usb_driver *driver = NULL;
1234 /* get input parameters and alloc buffer */
1235 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1237 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1238 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1240 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1241 if (copy_from_user (buf, ctrl.data, size)) {
1246 memset (buf, 0, size);
1250 if (!connected(ps->dev)) {
1256 if (ps->dev->state != USB_STATE_CONFIGURED)
1257 retval = -EHOSTUNREACH;
1258 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1260 else switch (ctrl.ioctl_code) {
1262 /* disconnect kernel driver from interface */
1263 case USBDEVFS_DISCONNECT:
1265 /* don't allow the user to unbind the hub driver from
1266 * a hub with children to manage */
1267 for (i = 0; i < ps->dev->maxchild; ++i) {
1268 if (ps->dev->children[i])
1274 down_write(&usb_bus_type.subsys.rwsem);
1275 if (intf->dev.driver) {
1276 driver = to_usb_driver(intf->dev.driver);
1277 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1278 usb_driver_release_interface(driver, intf);
1281 up_write(&usb_bus_type.subsys.rwsem);
1284 /* let kernel drivers try to (re)bind to the interface */
1285 case USBDEVFS_CONNECT:
1286 usb_unlock_device(ps->dev);
1287 usb_lock_all_devices();
1288 bus_rescan_devices(intf->dev.bus);
1289 usb_unlock_all_devices();
1290 usb_lock_device(ps->dev);
1293 /* talk directly to the interface's driver */
1295 down_read(&usb_bus_type.subsys.rwsem);
1296 if (intf->dev.driver)
1297 driver = to_usb_driver(intf->dev.driver);
1298 if (driver == NULL || driver->ioctl == NULL) {
1301 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1302 if (retval == -ENOIOCTLCMD)
1305 up_read(&usb_bus_type.subsys.rwsem);
1308 /* cleanup and return */
1310 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1312 && copy_to_user (ctrl.data, buf, size) != 0)
1320 * NOTE: All requests here that have interface numbers as parameters
1321 * are assuming that somehow the configuration has been prevented from
1322 * changing. But there's no mechanism to ensure that...
1324 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1326 struct dev_state *ps = (struct dev_state *)file->private_data;
1327 struct usb_device *dev = ps->dev;
1328 void __user *p = (void __user *)arg;
1331 if (!(file->f_mode & FMODE_WRITE))
1333 usb_lock_device(dev);
1334 if (!connected(dev)) {
1335 usb_unlock_device(dev);
1340 case USBDEVFS_CONTROL:
1341 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1342 ret = proc_control(ps, p);
1344 inode->i_mtime = CURRENT_TIME;
1348 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1349 ret = proc_bulk(ps, p);
1351 inode->i_mtime = CURRENT_TIME;
1354 case USBDEVFS_RESETEP:
1355 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1356 ret = proc_resetep(ps, p);
1358 inode->i_mtime = CURRENT_TIME;
1361 case USBDEVFS_RESET:
1362 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1363 ret = proc_resetdevice(ps);
1366 case USBDEVFS_CLEAR_HALT:
1367 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1368 ret = proc_clearhalt(ps, p);
1370 inode->i_mtime = CURRENT_TIME;
1373 case USBDEVFS_GETDRIVER:
1374 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1375 ret = proc_getdriver(ps, p);
1378 case USBDEVFS_CONNECTINFO:
1379 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1380 ret = proc_connectinfo(ps, p);
1383 case USBDEVFS_SETINTERFACE:
1384 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1385 ret = proc_setintf(ps, p);
1388 case USBDEVFS_SETCONFIGURATION:
1389 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1390 ret = proc_setconfig(ps, p);
1393 case USBDEVFS_SUBMITURB:
1394 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1395 ret = proc_submiturb(ps, p);
1397 inode->i_mtime = CURRENT_TIME;
1400 #ifdef CONFIG_COMPAT
1402 case USBDEVFS_SUBMITURB32:
1403 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1404 ret = proc_submiturb_compat(ps, p);
1406 inode->i_mtime = CURRENT_TIME;
1409 case USBDEVFS_REAPURB32:
1410 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1411 ret = proc_reapurb_compat(ps, p);
1414 case USBDEVFS_REAPURBNDELAY32:
1415 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1416 ret = proc_reapurbnonblock_compat(ps, p);
1421 case USBDEVFS_DISCARDURB:
1422 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1423 ret = proc_unlinkurb(ps, p);
1426 case USBDEVFS_REAPURB:
1427 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1428 ret = proc_reapurb(ps, p);
1431 case USBDEVFS_REAPURBNDELAY:
1432 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1433 ret = proc_reapurbnonblock(ps, p);
1436 case USBDEVFS_DISCSIGNAL:
1437 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1438 ret = proc_disconnectsignal(ps, p);
1441 case USBDEVFS_CLAIMINTERFACE:
1442 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1443 ret = proc_claiminterface(ps, p);
1446 case USBDEVFS_RELEASEINTERFACE:
1447 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1448 ret = proc_releaseinterface(ps, p);
1451 case USBDEVFS_IOCTL:
1452 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1453 ret = proc_ioctl(ps, p);
1456 usb_unlock_device(dev);
1458 inode->i_atime = CURRENT_TIME;
1462 /* No kernel lock - fine */
1463 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1465 struct dev_state *ps = (struct dev_state *)file->private_data;
1466 unsigned int mask = 0;
1468 poll_wait(file, &ps->wait, wait);
1469 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1470 mask |= POLLOUT | POLLWRNORM;
1471 if (!connected(ps->dev))
1472 mask |= POLLERR | POLLHUP;
1476 struct file_operations usbfs_device_file_operations = {
1477 .llseek = usbdev_lseek,
1478 .read = usbdev_read,
1479 .poll = usbdev_poll,
1480 .ioctl = usbdev_ioctl,
1481 .open = usbdev_open,
1482 .release = usbdev_release,