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[PATCH] x86_64: Fix change_page_attr cache flushing
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / core / devio.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2
3/*
4 * devio.c -- User space communication with USB devices.
5 *
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
7 *
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.
12 *
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.
17 *
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.
21 *
22 * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
23 *
24 * This file implements the usbfs/x/y files, where
25 * x is the bus number and y the device number.
26 *
27 * It allows user space programs/"drivers" to communicate directly
28 * with USB devices without intervening kernel driver.
29 *
30 * Revision history
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 */
34
35/*****************************************************************************/
36
37#include <linux/fs.h>
38#include <linux/mm.h>
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>
fbf82fd2 46#include <linux/cdev.h>
1da177e4
LT		 47#include <asm/uaccess.h>
48#include <asm/byteorder.h>
49#include <linux/moduleparam.h>
50
51#include "hcd.h" /* for usbcore internals */
52#include "usb.h"
53
fbf82fd2
KS		 54#define USB_MAXBUS 64
55#define USB_DEVICE_MAX USB_MAXBUS * 128
56static struct class *usb_device_class;
57
1da177e4
LT		 58struct async {
59 struct list_head asynclist;
60 struct dev_state *ps;
61 struct task_struct *task;
62 unsigned int signr;
63 unsigned int ifnum;
64 void __user *userbuffer;
65 void __user *userurb;
66 struct urb *urb;
67};
68
69static int usbfs_snoop = 0;
70module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
71MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
72
73#define snoop(dev, format, arg...) \
74 do { \
75 if (usbfs_snoop) \
76 dev_info( dev , format , ## arg); \
77 } while (0)
78
fad21bdf
AS		 79#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
80
1da177e4
LT		 81
82#define MAX_USBFS_BUFFER_SIZE 16384
83
84static inline int connected (struct usb_device *dev)
85{
86 return dev->state != USB_STATE_NOTATTACHED;
87}
88
89static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
90{
91 loff_t ret;
92
93 lock_kernel();
94
95 switch (orig) {
96 case 0:
97 file->f_pos = offset;
98 ret = file->f_pos;
99 break;
100 case 1:
101 file->f_pos += offset;
102 ret = file->f_pos;
103 break;
104 case 2:
105 default:
106 ret = -EINVAL;
107 }
108
109 unlock_kernel();
110 return ret;
111}
112
113static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
114{
115 struct dev_state *ps = (struct dev_state *)file->private_data;
116 struct usb_device *dev = ps->dev;
117 ssize_t ret = 0;
118 unsigned len;
119 loff_t pos;
120 int i;
121
122 pos = *ppos;
123 usb_lock_device(dev);
124 if (!connected(dev)) {
125 ret = -ENODEV;
126 goto err;
127 } else if (pos < 0) {
128 ret = -EINVAL;
129 goto err;
130 }
131
132 if (pos < sizeof(struct usb_device_descriptor)) {
133 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
134 if (!desc) {
135 ret = -ENOMEM;
136 goto err;
137 }
138 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
139 le16_to_cpus(&desc->bcdUSB);
140 le16_to_cpus(&desc->idVendor);
141 le16_to_cpus(&desc->idProduct);
142 le16_to_cpus(&desc->bcdDevice);
143
144 len = sizeof(struct usb_device_descriptor) - pos;
145 if (len > nbytes)
146 len = nbytes;
147 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
148 kfree(desc);
149 ret = -EFAULT;
150 goto err;
151 }
152 kfree(desc);
153
154 *ppos += len;
155 buf += len;
156 nbytes -= len;
157 ret += len;
158 }
159
160 pos = sizeof(struct usb_device_descriptor);
161 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
162 struct usb_config_descriptor *config =
163 (struct usb_config_descriptor *)dev->rawdescriptors[i];
164 unsigned int length = le16_to_cpu(config->wTotalLength);
165
166 if (*ppos < pos + length) {
167
168 /* The descriptor may claim to be longer than it
169 * really is. Here is the actual allocated length. */
170 unsigned alloclen =
171 le16_to_cpu(dev->config[i].desc.wTotalLength);
172
173 len = length - (*ppos - pos);
174 if (len > nbytes)
175 len = nbytes;
176
177 /* Simply don't write (skip over) unallocated parts */
178 if (alloclen > (*ppos - pos)) {
179 alloclen -= (*ppos - pos);
180 if (copy_to_user(buf,
181 dev->rawdescriptors[i] + (*ppos - pos),
182 min(len, alloclen))) {
183 ret = -EFAULT;
184 goto err;
185 }
186 }
187
188 *ppos += len;
189 buf += len;
190 nbytes -= len;
191 ret += len;
192 }
193
194 pos += length;
195 }
196
197err:
198 usb_unlock_device(dev);
199 return ret;
200}
201
202/*
203 * async list handling
204 */
205
206static struct async *alloc_async(unsigned int numisoframes)
207{
208 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
209 struct async *as = kmalloc(assize, GFP_KERNEL);
210 if (!as)
211 return NULL;
212 memset(as, 0, assize);
213 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
214 if (!as->urb) {
215 kfree(as);
216 return NULL;
217 }
218 return as;
219}
220
221static void free_async(struct async *as)
222{
6fd19f4b
JJ		 223 kfree(as->urb->transfer_buffer);
224 kfree(as->urb->setup_packet);
1da177e4 225 usb_free_urb(as->urb);
6fd19f4b 226 kfree(as);
1da177e4
LT		 227}
228
229static inline void async_newpending(struct async *as)
230{
231 struct dev_state *ps = as->ps;
232 unsigned long flags;
233
234 spin_lock_irqsave(&ps->lock, flags);
235 list_add_tail(&as->asynclist, &ps->async_pending);
236 spin_unlock_irqrestore(&ps->lock, flags);
237}
238
239static inline void async_removepending(struct async *as)
240{
241 struct dev_state *ps = as->ps;
242 unsigned long flags;
243
244 spin_lock_irqsave(&ps->lock, flags);
245 list_del_init(&as->asynclist);
246 spin_unlock_irqrestore(&ps->lock, flags);
247}
248
249static inline struct async *async_getcompleted(struct dev_state *ps)
250{
251 unsigned long flags;
252 struct async *as = NULL;
253
254 spin_lock_irqsave(&ps->lock, flags);
255 if (!list_empty(&ps->async_completed)) {
256 as = list_entry(ps->async_completed.next, struct async, asynclist);
257 list_del_init(&as->asynclist);
258 }
259 spin_unlock_irqrestore(&ps->lock, flags);
260 return as;
261}
262
263static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
264{
265 unsigned long flags;
266 struct async *as;
267
268 spin_lock_irqsave(&ps->lock, flags);
269 list_for_each_entry(as, &ps->async_pending, asynclist)
270 if (as->userurb == userurb) {
271 list_del_init(&as->asynclist);
272 spin_unlock_irqrestore(&ps->lock, flags);
273 return as;
274 }
275 spin_unlock_irqrestore(&ps->lock, flags);
276 return NULL;
277}
278
279static void async_completed(struct urb *urb, struct pt_regs *regs)
280{
281 struct async *as = (struct async *)urb->context;
282 struct dev_state *ps = as->ps;
283 struct siginfo sinfo;
284
285 spin_lock(&ps->lock);
286 list_move_tail(&as->asynclist, &ps->async_completed);
287 spin_unlock(&ps->lock);
288 if (as->signr) {
289 sinfo.si_signo = as->signr;
290 sinfo.si_errno = as->urb->status;
291 sinfo.si_code = SI_ASYNCIO;
292 sinfo.si_addr = as->userurb;
293 send_sig_info(as->signr, &sinfo, as->task);
294 }
295 wake_up(&ps->wait);
296}
297
298static void destroy_async (struct dev_state *ps, struct list_head *list)
299{
300 struct async *as;
301 unsigned long flags;
302
303 spin_lock_irqsave(&ps->lock, flags);
304 while (!list_empty(list)) {
305 as = list_entry(list->next, struct async, asynclist);
306 list_del_init(&as->asynclist);
307
308 /* drop the spinlock so the completion handler can run */
309 spin_unlock_irqrestore(&ps->lock, flags);
310 usb_kill_urb(as->urb);
311 spin_lock_irqsave(&ps->lock, flags);
312 }
313 spin_unlock_irqrestore(&ps->lock, flags);
314 as = async_getcompleted(ps);
315 while (as) {
316 free_async(as);
317 as = async_getcompleted(ps);
318 }
319}
320
321static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
322{
323 struct list_head *p, *q, hitlist;
324 unsigned long flags;
325
326 INIT_LIST_HEAD(&hitlist);
327 spin_lock_irqsave(&ps->lock, flags);
328 list_for_each_safe(p, q, &ps->async_pending)
329 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
330 list_move_tail(p, &hitlist);
331 spin_unlock_irqrestore(&ps->lock, flags);
332 destroy_async(ps, &hitlist);
333}
334
335static inline void destroy_all_async(struct dev_state *ps)
336{
337 destroy_async(ps, &ps->async_pending);
338}
339
340/*
341 * interface claims are made only at the request of user level code,
342 * which can also release them (explicitly or by closing files).
343 * they're also undone when devices disconnect.
344 */
345
346static int driver_probe (struct usb_interface *intf,
347 const struct usb_device_id *id)
348{
349 return -ENODEV;
350}
351
352static void driver_disconnect(struct usb_interface *intf)
353{
354 struct dev_state *ps = usb_get_intfdata (intf);
355 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
356
357 if (!ps)
358 return;
359
360 /* NOTE: this relies on usbcore having canceled and completed
361 * all pending I/O requests; 2.6 does that.
362 */
363
364 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
365 clear_bit(ifnum, &ps->ifclaimed);
366 else
367 warn("interface number %u out of range", ifnum);
368
369 usb_set_intfdata (intf, NULL);
370
371 /* force async requests to complete */
372 destroy_async_on_interface(ps, ifnum);
373}
374
375struct usb_driver usbfs_driver = {
376 .owner = THIS_MODULE,
377 .name = "usbfs",
378 .probe = driver_probe,
379 .disconnect = driver_disconnect,
380};
381
382static int claimintf(struct dev_state *ps, unsigned int ifnum)
383{
384 struct usb_device *dev = ps->dev;
385 struct usb_interface *intf;
386 int err;
387
388 if (ifnum >= 8*sizeof(ps->ifclaimed))
389 return -EINVAL;
390 /* already claimed */
391 if (test_bit(ifnum, &ps->ifclaimed))
392 return 0;
393
394 /* lock against other changes to driver bindings */
395 down_write(&usb_bus_type.subsys.rwsem);
396 intf = usb_ifnum_to_if(dev, ifnum);
397 if (!intf)
398 err = -ENOENT;
399 else
400 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
401 up_write(&usb_bus_type.subsys.rwsem);
402 if (err == 0)
403 set_bit(ifnum, &ps->ifclaimed);
404 return err;
405}
406
407static int releaseintf(struct dev_state *ps, unsigned int ifnum)
408{
409 struct usb_device *dev;
410 struct usb_interface *intf;
411 int err;
412
413 err = -EINVAL;
414 if (ifnum >= 8*sizeof(ps->ifclaimed))
415 return err;
416 dev = ps->dev;
417 /* lock against other changes to driver bindings */
418 down_write(&usb_bus_type.subsys.rwsem);
419 intf = usb_ifnum_to_if(dev, ifnum);
420 if (!intf)
421 err = -ENOENT;
422 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
423 usb_driver_release_interface(&usbfs_driver, intf);
424 err = 0;
425 }
426 up_write(&usb_bus_type.subsys.rwsem);
427 return err;
428}
429
430static int checkintf(struct dev_state *ps, unsigned int ifnum)
431{
432 if (ps->dev->state != USB_STATE_CONFIGURED)
433 return -EHOSTUNREACH;
434 if (ifnum >= 8*sizeof(ps->ifclaimed))
435 return -EINVAL;
436 if (test_bit(ifnum, &ps->ifclaimed))
437 return 0;
438 /* if not yet claimed, claim it for the driver */
439 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
440 current->pid, current->comm, ifnum);
441 return claimintf(ps, ifnum);
442}
443
444static int findintfep(struct usb_device *dev, unsigned int ep)
445{
446 unsigned int i, j, e;
447 struct usb_interface *intf;
448 struct usb_host_interface *alts;
449 struct usb_endpoint_descriptor *endpt;
450
451 if (ep & ~(USB_DIR_IN|0xf))
452 return -EINVAL;
453 if (!dev->actconfig)
454 return -ESRCH;
455 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
456 intf = dev->actconfig->interface[i];
457 for (j = 0; j < intf->num_altsetting; j++) {
458 alts = &intf->altsetting[j];
459 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
460 endpt = &alts->endpoint[e].desc;
461 if (endpt->bEndpointAddress == ep)
462 return alts->desc.bInterfaceNumber;
463 }
464 }
465 }
466 return -ENOENT;
467}
468
469static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
470{
471 int ret = 0;
472
473 if (ps->dev->state != USB_STATE_CONFIGURED)
474 return -EHOSTUNREACH;
475 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
476 return 0;
477
478 index &= 0xff;
479 switch (requesttype & USB_RECIP_MASK) {
480 case USB_RECIP_ENDPOINT:
481 if ((ret = findintfep(ps->dev, index)) >= 0)
482 ret = checkintf(ps, ret);
483 break;
484
485 case USB_RECIP_INTERFACE:
486 ret = checkintf(ps, index);
487 break;
488 }
489 return ret;
490}
491
492/*
493 * file operations
494 */
495static int usbdev_open(struct inode *inode, struct file *file)
496{
fbf82fd2 497 struct usb_device *dev = NULL;
1da177e4
LT		 498 struct dev_state *ps;
499 int ret;
500
501 /*
502 * no locking necessary here, as chrdev_open has the kernel lock
503 * (still acquire the kernel lock for safety)
504 */
505 ret = -ENOMEM;
506 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
507 goto out_nolock;
508
509 lock_kernel();
510 ret = -ENOENT;
fbf82fd2
KS		 511 /* check if we are called from a real node or usbfs */
512 if (imajor(inode) == USB_DEVICE_MAJOR)
513 dev = usbdev_lookup_minor(iminor(inode));
514 if (!dev)
515 dev = inode->u.generic_ip;
1da177e4
LT		 516 if (!dev) {
517 kfree(ps);
518 goto out;
519 }
fbf82fd2 520 usb_get_dev(dev);
1da177e4
LT		 521 ret = 0;
522 ps->dev = dev;
523 ps->file = file;
524 spin_lock_init(&ps->lock);
525 INIT_LIST_HEAD(&ps->async_pending);
526 INIT_LIST_HEAD(&ps->async_completed);
527 init_waitqueue_head(&ps->wait);
528 ps->discsignr = 0;
529 ps->disctask = current;
530 ps->disccontext = NULL;
531 ps->ifclaimed = 0;
532 wmb();
533 list_add_tail(&ps->list, &dev->filelist);
534 file->private_data = ps;
535 out:
536 unlock_kernel();
537 out_nolock:
538 return ret;
539}
540
541static int usbdev_release(struct inode *inode, struct file *file)
542{
543 struct dev_state *ps = (struct dev_state *)file->private_data;
544 struct usb_device *dev = ps->dev;
545 unsigned int ifnum;
546
547 usb_lock_device(dev);
548 list_del_init(&ps->list);
549 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
550 ifnum++) {
551 if (test_bit(ifnum, &ps->ifclaimed))
552 releaseintf(ps, ifnum);
553 }
554 destroy_all_async(ps);
555 usb_unlock_device(dev);
556 usb_put_dev(dev);
557 ps->dev = NULL;
558 kfree(ps);
559 return 0;
560}
561
562static int proc_control(struct dev_state *ps, void __user *arg)
563{
564 struct usb_device *dev = ps->dev;
565 struct usbdevfs_ctrltransfer ctrl;
566 unsigned int tmo;
567 unsigned char *tbuf;
568 int i, j, ret;
569
570 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
571 return -EFAULT;
572 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
573 return ret;
574 if (ctrl.wLength > PAGE_SIZE)
575 return -EINVAL;
576 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
577 return -ENOMEM;
578 tmo = ctrl.timeout;
579 if (ctrl.bRequestType & 0x80) {
580 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
581 free_page((unsigned long)tbuf);
582 return -EINVAL;
583 }
fe0410c7
AS		 584 snoop(&dev->dev, "control read: bRequest=%02x "
585 "bRrequestType=%02x wValue=%04x "
586 "wIndex=%04x wLength=%04x\n",
587 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
588 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 589
590 usb_unlock_device(dev);
591 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
592 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
593 usb_lock_device(dev);
594 if ((i > 0) && ctrl.wLength) {
595 if (usbfs_snoop) {
596 dev_info(&dev->dev, "control read: data ");
fe0410c7 597 for (j = 0; j < i; ++j)
1da177e4
LT		 598 printk ("%02x ", (unsigned char)(tbuf)[j]);
599 printk("\n");
600 }
fe0410c7 601 if (copy_to_user(ctrl.data, tbuf, i)) {
1da177e4
LT		 602 free_page((unsigned long)tbuf);
603 return -EFAULT;
604 }
605 }
606 } else {
607 if (ctrl.wLength) {
608 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
609 free_page((unsigned long)tbuf);
610 return -EFAULT;
611 }
612 }
fe0410c7
AS		 613 snoop(&dev->dev, "control write: bRequest=%02x "
614 "bRrequestType=%02x wValue=%04x "
615 "wIndex=%04x wLength=%04x\n",
616 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
617 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 618 if (usbfs_snoop) {
619 dev_info(&dev->dev, "control write: data: ");
620 for (j = 0; j < ctrl.wLength; ++j)
621 printk ("%02x ", (unsigned char)(tbuf)[j]);
622 printk("\n");
623 }
624 usb_unlock_device(dev);
625 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
626 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
627 usb_lock_device(dev);
628 }
629 free_page((unsigned long)tbuf);
630 if (i<0 && i != -EPIPE) {
631 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
632 "failed cmd %s rqt %u rq %u len %u ret %d\n",
633 current->comm, ctrl.bRequestType, ctrl.bRequest,
634 ctrl.wLength, i);
635 }
636 return i;
637}
638
639static int proc_bulk(struct dev_state *ps, void __user *arg)
640{
641 struct usb_device *dev = ps->dev;
642 struct usbdevfs_bulktransfer bulk;
643 unsigned int tmo, len1, pipe;
644 int len2;
645 unsigned char *tbuf;
646 int i, ret;
647
648 if (copy_from_user(&bulk, arg, sizeof(bulk)))
649 return -EFAULT;
650 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
651 return ret;
652 if ((ret = checkintf(ps, ret)))
653 return ret;
654 if (bulk.ep & USB_DIR_IN)
655 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
656 else
657 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
658 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
659 return -EINVAL;
660 len1 = bulk.len;
661 if (len1 > MAX_USBFS_BUFFER_SIZE)
662 return -EINVAL;
663 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
664 return -ENOMEM;
665 tmo = bulk.timeout;
666 if (bulk.ep & 0x80) {
667 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
668 kfree(tbuf);
669 return -EINVAL;
670 }
671 usb_unlock_device(dev);
672 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
673 usb_lock_device(dev);
674 if (!i && len2) {
675 if (copy_to_user(bulk.data, tbuf, len2)) {
676 kfree(tbuf);
677 return -EFAULT;
678 }
679 }
680 } else {
681 if (len1) {
682 if (copy_from_user(tbuf, bulk.data, len1)) {
683 kfree(tbuf);
684 return -EFAULT;
685 }
686 }
687 usb_unlock_device(dev);
688 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
689 usb_lock_device(dev);
690 }
691 kfree(tbuf);
692 if (i < 0)
693 return i;
694 return len2;
695}
696
697static int proc_resetep(struct dev_state *ps, void __user *arg)
698{
699 unsigned int ep;
700 int ret;
701
702 if (get_user(ep, (unsigned int __user *)arg))
703 return -EFAULT;
704 if ((ret = findintfep(ps->dev, ep)) < 0)
705 return ret;
706 if ((ret = checkintf(ps, ret)))
707 return ret;
708 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
709 return 0;
710}
711
712static int proc_clearhalt(struct dev_state *ps, void __user *arg)
713{
714 unsigned int ep;
715 int pipe;
716 int ret;
717
718 if (get_user(ep, (unsigned int __user *)arg))
719 return -EFAULT;
720 if ((ret = findintfep(ps->dev, ep)) < 0)
721 return ret;
722 if ((ret = checkintf(ps, ret)))
723 return ret;
724 if (ep & USB_DIR_IN)
725 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
726 else
727 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
728
729 return usb_clear_halt(ps->dev, pipe);
730}
731
732
733static int proc_getdriver(struct dev_state *ps, void __user *arg)
734{
735 struct usbdevfs_getdriver gd;
736 struct usb_interface *intf;
737 int ret;
738
739 if (copy_from_user(&gd, arg, sizeof(gd)))
740 return -EFAULT;
741 down_read(&usb_bus_type.subsys.rwsem);
742 intf = usb_ifnum_to_if(ps->dev, gd.interface);
743 if (!intf || !intf->dev.driver)
744 ret = -ENODATA;
745 else {
746 strncpy(gd.driver, intf->dev.driver->name,
747 sizeof(gd.driver));
748 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
749 }
750 up_read(&usb_bus_type.subsys.rwsem);
751 return ret;
752}
753
754static int proc_connectinfo(struct dev_state *ps, void __user *arg)
755{
756 struct usbdevfs_connectinfo ci;
757
758 ci.devnum = ps->dev->devnum;
759 ci.slow = ps->dev->speed == USB_SPEED_LOW;
760 if (copy_to_user(arg, &ci, sizeof(ci)))
761 return -EFAULT;
762 return 0;
763}
764
765static int proc_resetdevice(struct dev_state *ps)
766{
767 return usb_reset_device(ps->dev);
768
769}
770
771static int proc_setintf(struct dev_state *ps, void __user *arg)
772{
773 struct usbdevfs_setinterface setintf;
774 int ret;
775
776 if (copy_from_user(&setintf, arg, sizeof(setintf)))
777 return -EFAULT;
778 if ((ret = checkintf(ps, setintf.interface)))
779 return ret;
780 return usb_set_interface(ps->dev, setintf.interface,
781 setintf.altsetting);
782}
783
784static int proc_setconfig(struct dev_state *ps, void __user *arg)
785{
786 unsigned int u;
787 int status = 0;
788 struct usb_host_config *actconfig;
789
790 if (get_user(u, (unsigned int __user *)arg))
791 return -EFAULT;
792
793 actconfig = ps->dev->actconfig;
794
795 /* Don't touch the device if any interfaces are claimed.
796 * It could interfere with other drivers' operations, and if
797 * an interface is claimed by usbfs it could easily deadlock.
798 */
799 if (actconfig) {
800 int i;
801
802 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
803 if (usb_interface_claimed(actconfig->interface[i])) {
804 dev_warn (&ps->dev->dev,
72ebddb5 805 "usbfs: interface %d claimed by %s "
1da177e4
LT		 806 "while '%s' sets config #%d\n",
807 actconfig->interface[i]
808 ->cur_altsetting
809 ->desc.bInterfaceNumber,
72ebddb5
DB		 810 actconfig->interface[i]
811 ->dev.driver->name,
1da177e4 812 current->comm, u);
1da177e4
LT		 813 status = -EBUSY;
814 break;
1da177e4
LT		 815 }
816 }
817 }
818
819 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
820 * so avoid usb_set_configuration()'s kick to sysfs
821 */
822 if (status == 0) {
823 if (actconfig && actconfig->desc.bConfigurationValue == u)
824 status = usb_reset_configuration(ps->dev);
825 else
826 status = usb_set_configuration(ps->dev, u);
827 }
828
829 return status;
830}
831
832
833static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
834 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
835 void __user *arg)
836{
837 struct usbdevfs_iso_packet_desc *isopkt = NULL;
838 struct usb_host_endpoint *ep;
839 struct async *as;
840 struct usb_ctrlrequest *dr = NULL;
841 unsigned int u, totlen, isofrmlen;
842 int ret, interval = 0, ifnum = -1;
843
844 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
845 URB_NO_FSBR|URB_ZERO_PACKET))
846 return -EINVAL;
847 if (!uurb->buffer)
848 return -EINVAL;
849 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
850 return -EINVAL;
851 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
852 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
853 return ifnum;
854 if ((ret = checkintf(ps, ifnum)))
855 return ret;
856 }
857 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
858 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
859 else
860 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
861 if (!ep)
862 return -ENOENT;
863 switch(uurb->type) {
864 case USBDEVFS_URB_TYPE_CONTROL:
865 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
866 != USB_ENDPOINT_XFER_CONTROL)
867 return -EINVAL;
868 /* min 8 byte setup packet, max arbitrary */
869 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
870 return -EINVAL;
871 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
872 return -ENOMEM;
873 if (copy_from_user(dr, uurb->buffer, 8)) {
874 kfree(dr);
875 return -EFAULT;
876 }
877 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
878 kfree(dr);
879 return -EINVAL;
880 }
881 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
882 kfree(dr);
883 return ret;
884 }
885 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
886 uurb->number_of_packets = 0;
887 uurb->buffer_length = le16_to_cpup(&dr->wLength);
888 uurb->buffer += 8;
889 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
890 kfree(dr);
891 return -EFAULT;
892 }
893 break;
894
895 case USBDEVFS_URB_TYPE_BULK:
896 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
897 case USB_ENDPOINT_XFER_CONTROL:
898 case USB_ENDPOINT_XFER_ISOC:
899 return -EINVAL;
900 /* allow single-shot interrupt transfers, at bogus rates */
901 }
902 uurb->number_of_packets = 0;
903 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
904 return -EINVAL;
905 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
906 return -EFAULT;
907 break;
908
909 case USBDEVFS_URB_TYPE_ISO:
910 /* arbitrary limit */
911 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
912 return -EINVAL;
913 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
914 != USB_ENDPOINT_XFER_ISOC)
915 return -EINVAL;
916 interval = 1 << min (15, ep->desc.bInterval - 1);
917 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
918 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
919 return -ENOMEM;
920 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
921 kfree(isopkt);
922 return -EFAULT;
923 }
924 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
925 if (isopkt[u].length > 1023) {
926 kfree(isopkt);
927 return -EINVAL;
928 }
929 totlen += isopkt[u].length;
930 }
931 if (totlen > 32768) {
932 kfree(isopkt);
933 return -EINVAL;
934 }
935 uurb->buffer_length = totlen;
936 break;
937
938 case USBDEVFS_URB_TYPE_INTERRUPT:
939 uurb->number_of_packets = 0;
940 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
941 != USB_ENDPOINT_XFER_INT)
942 return -EINVAL;
943 if (ps->dev->speed == USB_SPEED_HIGH)
944 interval = 1 << min (15, ep->desc.bInterval - 1);
945 else
946 interval = ep->desc.bInterval;
947 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
948 return -EINVAL;
949 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
950 return -EFAULT;
951 break;
952
953 default:
954 return -EINVAL;
955 }
956 if (!(as = alloc_async(uurb->number_of_packets))) {
6fd19f4b
JJ		 957 kfree(isopkt);
958 kfree(dr);
1da177e4
LT		 959 return -ENOMEM;
960 }
961 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
6fd19f4b
JJ		 962 kfree(isopkt);
963 kfree(dr);
1da177e4
LT		 964 free_async(as);
965 return -ENOMEM;
966 }
967 as->urb->dev = ps->dev;
968 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
969 as->urb->transfer_flags = uurb->flags;
970 as->urb->transfer_buffer_length = uurb->buffer_length;
971 as->urb->setup_packet = (unsigned char*)dr;
972 as->urb->start_frame = uurb->start_frame;
973 as->urb->number_of_packets = uurb->number_of_packets;
974 as->urb->interval = interval;
975 as->urb->context = as;
976 as->urb->complete = async_completed;
977 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
978 as->urb->iso_frame_desc[u].offset = totlen;
979 as->urb->iso_frame_desc[u].length = isopkt[u].length;
980 totlen += isopkt[u].length;
981 }
6fd19f4b 982 kfree(isopkt);
1da177e4
LT		 983 as->ps = ps;
984 as->userurb = arg;
985 if (uurb->endpoint & USB_DIR_IN)
986 as->userbuffer = uurb->buffer;
987 else
988 as->userbuffer = NULL;
989 as->signr = uurb->signr;
990 as->ifnum = ifnum;
991 as->task = current;
992 if (!(uurb->endpoint & USB_DIR_IN)) {
993 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
994 free_async(as);
995 return -EFAULT;
996 }
997 }
998 async_newpending(as);
999 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1000 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1001 async_removepending(as);
1002 free_async(as);
1003 return ret;
1004 }
1005 return 0;
1006}
1007
1008static int proc_submiturb(struct dev_state *ps, void __user *arg)
1009{
1010 struct usbdevfs_urb uurb;
1011
1012 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1013 return -EFAULT;
1014
1015 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1016}
1017
1018static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1019{
1020 struct async *as;
1021
1022 as = async_getpending(ps, arg);
1023 if (!as)
1024 return -EINVAL;
1025 usb_kill_urb(as->urb);
1026 return 0;
1027}
1028
1029static int processcompl(struct async *as, void __user * __user *arg)
1030{
1031 struct urb *urb = as->urb;
1032 struct usbdevfs_urb __user *userurb = as->userurb;
1033 void __user *addr = as->userurb;
1034 unsigned int i;
1035
1036 if (as->userbuffer)
1037 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1038 return -EFAULT;
1039 if (put_user(urb->status, &userurb->status))
1040 return -EFAULT;
1041 if (put_user(urb->actual_length, &userurb->actual_length))
1042 return -EFAULT;
1043 if (put_user(urb->error_count, &userurb->error_count))
1044 return -EFAULT;
1045
668a9541
CL		 1046 if (usb_pipeisoc(urb->pipe)) {
1047 for (i = 0; i < urb->number_of_packets; i++) {
1048 if (put_user(urb->iso_frame_desc[i].actual_length,
1049 &userurb->iso_frame_desc[i].actual_length))
1050 return -EFAULT;
1051 if (put_user(urb->iso_frame_desc[i].status,
1052 &userurb->iso_frame_desc[i].status))
1053 return -EFAULT;
1054 }
1da177e4
LT		 1055 }
1056
1057 free_async(as);
1058
1059 if (put_user(addr, (void __user * __user *)arg))
1060 return -EFAULT;
1061 return 0;
1062}
1063
1064static struct async* reap_as(struct dev_state *ps)
1065{
1066 DECLARE_WAITQUEUE(wait, current);
1067 struct async *as = NULL;
1068 struct usb_device *dev = ps->dev;
1069
1070 add_wait_queue(&ps->wait, &wait);
1071 for (;;) {
1072 __set_current_state(TASK_INTERRUPTIBLE);
1073 if ((as = async_getcompleted(ps)))
1074 break;
1075 if (signal_pending(current))
1076 break;
1077 usb_unlock_device(dev);
1078 schedule();
1079 usb_lock_device(dev);
1080 }
1081 remove_wait_queue(&ps->wait, &wait);
1082 set_current_state(TASK_RUNNING);
1083 return as;
1084}
1085
1086static int proc_reapurb(struct dev_state *ps, void __user *arg)
1087{
1088 struct async *as = reap_as(ps);
1089 if (as)
1090 return processcompl(as, (void __user * __user *)arg);
1091 if (signal_pending(current))
1092 return -EINTR;
1093 return -EIO;
1094}
1095
1096static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1097{
1098 struct async *as;
1099
1100 if (!(as = async_getcompleted(ps)))
1101 return -EAGAIN;
1102 return processcompl(as, (void __user * __user *)arg);
1103}
1104
1105#ifdef CONFIG_COMPAT
1106
1107static int get_urb32(struct usbdevfs_urb *kurb,
1108 struct usbdevfs_urb32 __user *uurb)
1109{
1110 __u32 uptr;
1111 if (get_user(kurb->type, &uurb->type) ||
1112 __get_user(kurb->endpoint, &uurb->endpoint) ||
1113 __get_user(kurb->status, &uurb->status) ||
1114 __get_user(kurb->flags, &uurb->flags) ||
1115 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1116 __get_user(kurb->actual_length, &uurb->actual_length) ||
1117 __get_user(kurb->start_frame, &uurb->start_frame) ||
1118 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1119 __get_user(kurb->error_count, &uurb->error_count) ||
1120 __get_user(kurb->signr, &uurb->signr))
1121 return -EFAULT;
1122
1123 if (__get_user(uptr, &uurb->buffer))
1124 return -EFAULT;
1125 kurb->buffer = compat_ptr(uptr);
1126 if (__get_user(uptr, &uurb->buffer))
1127 return -EFAULT;
1128 kurb->usercontext = compat_ptr(uptr);
1129
1130 return 0;
1131}
1132
1133static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1134{
1135 struct usbdevfs_urb uurb;
1136
1137 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1138 return -EFAULT;
1139
668a9541 1140 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1da177e4
LT		 1141}
1142
1143static int processcompl_compat(struct async *as, void __user * __user *arg)
1144{
1145 struct urb *urb = as->urb;
1146 struct usbdevfs_urb32 __user *userurb = as->userurb;
1147 void __user *addr = as->userurb;
1148 unsigned int i;
1149
1150 if (as->userbuffer)
1151 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1152 return -EFAULT;
1153 if (put_user(urb->status, &userurb->status))
1154 return -EFAULT;
1155 if (put_user(urb->actual_length, &userurb->actual_length))
1156 return -EFAULT;
1157 if (put_user(urb->error_count, &userurb->error_count))
1158 return -EFAULT;
1159
668a9541
CL		 1160 if (usb_pipeisoc(urb->pipe)) {
1161 for (i = 0; i < urb->number_of_packets; i++) {
1162 if (put_user(urb->iso_frame_desc[i].actual_length,
1163 &userurb->iso_frame_desc[i].actual_length))
1164 return -EFAULT;
1165 if (put_user(urb->iso_frame_desc[i].status,
1166 &userurb->iso_frame_desc[i].status))
1167 return -EFAULT;
1168 }
1da177e4
LT		 1169 }
1170
1171 free_async(as);
1172 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1173 return -EFAULT;
1174 return 0;
1175}
1176
1177static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1178{
1179 struct async *as = reap_as(ps);
1180 if (as)
1181 return processcompl_compat(as, (void __user * __user *)arg);
1182 if (signal_pending(current))
1183 return -EINTR;
1184 return -EIO;
1185}
1186
1187static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1188{
1189 struct async *as;
1190
1da177e4
LT		 1191 if (!(as = async_getcompleted(ps)))
1192 return -EAGAIN;
1da177e4
LT		 1193 return processcompl_compat(as, (void __user * __user *)arg);
1194}
1195
1196#endif
1197
1198static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1199{
1200 struct usbdevfs_disconnectsignal ds;
1201
1202 if (copy_from_user(&ds, arg, sizeof(ds)))
1203 return -EFAULT;
1204 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1205 return -EINVAL;
1206 ps->discsignr = ds.signr;
1207 ps->disccontext = ds.context;
1208 return 0;
1209}
1210
1211static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1212{
1213 unsigned int ifnum;
1214
1215 if (get_user(ifnum, (unsigned int __user *)arg))
1216 return -EFAULT;
1217 return claimintf(ps, ifnum);
1218}
1219
1220static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1221{
1222 unsigned int ifnum;
1223 int ret;
1224
1225 if (get_user(ifnum, (unsigned int __user *)arg))
1226 return -EFAULT;
1227 if ((ret = releaseintf(ps, ifnum)) < 0)
1228 return ret;
1229 destroy_async_on_interface (ps, ifnum);
1230 return 0;
1231}
1232
1233static int proc_ioctl (struct dev_state *ps, void __user *arg)
1234{
1235 struct usbdevfs_ioctl ctrl;
1236 int size;
1237 void *buf = NULL;
1238 int retval = 0;
1239 struct usb_interface *intf = NULL;
1240 struct usb_driver *driver = NULL;
1da177e4
LT		 1241
1242 /* get input parameters and alloc buffer */
1243 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1244 return -EFAULT;
1245 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1246 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1247 return -ENOMEM;
1248 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1249 if (copy_from_user (buf, ctrl.data, size)) {
6fd19f4b 1250 kfree(buf);
1da177e4
LT		 1251 return -EFAULT;
1252 }
1253 } else {
1254 memset (buf, 0, size);
1255 }
1256 }
1257
1258 if (!connected(ps->dev)) {
6fd19f4b 1259 kfree(buf);
1da177e4
LT		 1260 return -ENODEV;
1261 }
1262
1263 if (ps->dev->state != USB_STATE_CONFIGURED)
1264 retval = -EHOSTUNREACH;
1265 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1266 retval = -EINVAL;
1267 else switch (ctrl.ioctl_code) {
1268
1269 /* disconnect kernel driver from interface */
1270 case USBDEVFS_DISCONNECT:
1271
1da177e4
LT		 1272 down_write(&usb_bus_type.subsys.rwsem);
1273 if (intf->dev.driver) {
1274 driver = to_usb_driver(intf->dev.driver);
1275 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1276 usb_driver_release_interface(driver, intf);
1277 } else
1278 retval = -ENODATA;
1279 up_write(&usb_bus_type.subsys.rwsem);
1280 break;
1281
1282 /* let kernel drivers try to (re)bind to the interface */
1283 case USBDEVFS_CONNECT:
1284 usb_unlock_device(ps->dev);
1285 usb_lock_all_devices();
1286 bus_rescan_devices(intf->dev.bus);
1287 usb_unlock_all_devices();
1288 usb_lock_device(ps->dev);
1289 break;
1290
1291 /* talk directly to the interface's driver */
1292 default:
1293 down_read(&usb_bus_type.subsys.rwsem);
1294 if (intf->dev.driver)
1295 driver = to_usb_driver(intf->dev.driver);
1296 if (driver == NULL || driver->ioctl == NULL) {
1297 retval = -ENOTTY;
1298 } else {
1299 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1300 if (retval == -ENOIOCTLCMD)
1301 retval = -ENOTTY;
1302 }
1303 up_read(&usb_bus_type.subsys.rwsem);
1304 }
1305
1306 /* cleanup and return */
1307 if (retval >= 0
1308 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1309 && size > 0
1310 && copy_to_user (ctrl.data, buf, size) != 0)
1311 retval = -EFAULT;
6fd19f4b
JJ		 1312
1313 kfree(buf);
1da177e4
LT		 1314 return retval;
1315}
1316
1317/*
1318 * NOTE: All requests here that have interface numbers as parameters
1319 * are assuming that somehow the configuration has been prevented from
1320 * changing. But there's no mechanism to ensure that...
1321 */
1322static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1323{
1324 struct dev_state *ps = (struct dev_state *)file->private_data;
1325 struct usb_device *dev = ps->dev;
1326 void __user *p = (void __user *)arg;
1327 int ret = -ENOTTY;
1328
1329 if (!(file->f_mode & FMODE_WRITE))
1330 return -EPERM;
1331 usb_lock_device(dev);
1332 if (!connected(dev)) {
1333 usb_unlock_device(dev);
1334 return -ENODEV;
1335 }
1336
1337 switch (cmd) {
1338 case USBDEVFS_CONTROL:
1339 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1340 ret = proc_control(ps, p);
1341 if (ret >= 0)
1342 inode->i_mtime = CURRENT_TIME;
1343 break;
1344
1345 case USBDEVFS_BULK:
1346 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1347 ret = proc_bulk(ps, p);
1348 if (ret >= 0)
1349 inode->i_mtime = CURRENT_TIME;
1350 break;
1351
1352 case USBDEVFS_RESETEP:
1353 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1354 ret = proc_resetep(ps, p);
1355 if (ret >= 0)
1356 inode->i_mtime = CURRENT_TIME;
1357 break;
1358
1359 case USBDEVFS_RESET:
1360 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1361 ret = proc_resetdevice(ps);
1362 break;
1363
1364 case USBDEVFS_CLEAR_HALT:
1365 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1366 ret = proc_clearhalt(ps, p);
1367 if (ret >= 0)
1368 inode->i_mtime = CURRENT_TIME;
1369 break;
1370
1371 case USBDEVFS_GETDRIVER:
1372 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1373 ret = proc_getdriver(ps, p);
1374 break;
1375
1376 case USBDEVFS_CONNECTINFO:
1377 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1378 ret = proc_connectinfo(ps, p);
1379 break;
1380
1381 case USBDEVFS_SETINTERFACE:
1382 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1383 ret = proc_setintf(ps, p);
1384 break;
1385
1386 case USBDEVFS_SETCONFIGURATION:
1387 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1388 ret = proc_setconfig(ps, p);
1389 break;
1390
1391 case USBDEVFS_SUBMITURB:
1392 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1393 ret = proc_submiturb(ps, p);
1394 if (ret >= 0)
1395 inode->i_mtime = CURRENT_TIME;
1396 break;
1397
1398#ifdef CONFIG_COMPAT
1399
1400 case USBDEVFS_SUBMITURB32:
1401 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1402 ret = proc_submiturb_compat(ps, p);
1403 if (ret >= 0)
1404 inode->i_mtime = CURRENT_TIME;
1405 break;
1406
1407 case USBDEVFS_REAPURB32:
1408 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1409 ret = proc_reapurb_compat(ps, p);
1410 break;
1411
1412 case USBDEVFS_REAPURBNDELAY32:
1413 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1414 ret = proc_reapurbnonblock_compat(ps, p);
1415 break;
1416
1417#endif
1418
1419 case USBDEVFS_DISCARDURB:
1420 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1421 ret = proc_unlinkurb(ps, p);
1422 break;
1423
1424 case USBDEVFS_REAPURB:
1425 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1426 ret = proc_reapurb(ps, p);
1427 break;
1428
1429 case USBDEVFS_REAPURBNDELAY:
1430 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1431 ret = proc_reapurbnonblock(ps, p);
1432 break;
1433
1434 case USBDEVFS_DISCSIGNAL:
1435 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1436 ret = proc_disconnectsignal(ps, p);
1437 break;
1438
1439 case USBDEVFS_CLAIMINTERFACE:
1440 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1441 ret = proc_claiminterface(ps, p);
1442 break;
1443
1444 case USBDEVFS_RELEASEINTERFACE:
1445 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1446 ret = proc_releaseinterface(ps, p);
1447 break;
1448
1449 case USBDEVFS_IOCTL:
1450 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1451 ret = proc_ioctl(ps, p);
1452 break;
1453 }
1454 usb_unlock_device(dev);
1455 if (ret >= 0)
1456 inode->i_atime = CURRENT_TIME;
1457 return ret;
1458}
1459
1460/* No kernel lock - fine */
1461static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1462{
1463 struct dev_state *ps = (struct dev_state *)file->private_data;
1464 unsigned int mask = 0;
1465
1466 poll_wait(file, &ps->wait, wait);
1467 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1468 mask |= POLLOUT | POLLWRNORM;
1469 if (!connected(ps->dev))
1470 mask |= POLLERR | POLLHUP;
1471 return mask;
1472}
1473
1474struct file_operations usbfs_device_file_operations = {
1475 .llseek = usbdev_lseek,
1476 .read = usbdev_read,
1477 .poll = usbdev_poll,
1478 .ioctl = usbdev_ioctl,
1479 .open = usbdev_open,
1480 .release = usbdev_release,
1481};
fbf82fd2
KS		 1482
1483struct usb_device *usbdev_lookup_minor(int minor)
1484{
1485 struct class_device *class_dev;
1486 struct usb_device *dev = NULL;
1487
1488 down(&usb_device_class->sem);
1489 list_for_each_entry(class_dev, &usb_device_class->children, node) {
1490 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
1491 dev = class_dev->class_data;
1492 break;
1493 }
1494 }
1495 up(&usb_device_class->sem);
1496
1497 return dev;
1498};
1499
1500void usbdev_add(struct usb_device *dev)
1501{
1502 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1503
1504 dev->class_dev = class_device_create(usb_device_class,
1505 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1506 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1507
1508 dev->class_dev->class_data = dev;
1509}
1510
1511void usbdev_remove(struct usb_device *dev)
1512{
1513 class_device_unregister(dev->class_dev);
1514}
1515
1516static struct cdev usb_device_cdev = {
1517 .kobj = {.name = "usb_device", },
1518 .owner = THIS_MODULE,
1519};
1520
1521int __init usbdev_init(void)
1522{
1523 int retval;
1524
fad21bdf
AS		 1525 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1526 "usb_device");
fbf82fd2
KS		 1527 if (retval) {
1528 err("unable to register minors for usb_device");
1529 goto out;
1530 }
1531 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
fad21bdf 1532 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1533 if (retval) {
1534 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
fad21bdf 1535 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1536 goto out;
1537 }
1538 usb_device_class = class_create(THIS_MODULE, "usb_device");
1539 if (IS_ERR(usb_device_class)) {
1540 err("unable to register usb_device class");
1541 retval = PTR_ERR(usb_device_class);
1542 usb_device_class = NULL;
1543 cdev_del(&usb_device_cdev);
fad21bdf 1544 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1545 }
1546
1547out:
1548 return retval;
1549}
1550
1551void usbdev_cleanup(void)
1552{
1553 class_destroy(usb_device_class);
1554 cdev_del(&usb_device_cdev);
fad21bdf 1555 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1556}
1557
kernel source for telekom puls (alcatel/mediatek)