Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/usb/misc/usbtest.c

  1 #include <linux/kernel.h>
  2 #include <linux/errno.h>
  3 #include <linux/init.h>
  4 #include <linux/slab.h>
  5 #include <linux/mm.h>
  6 #include <linux/module.h>
  7 #include <linux/moduleparam.h>
  8 #include <linux/scatterlist.h>
  9 #include <linux/mutex.h>
 10 
 11 #include <linux/usb.h>
 12 
 13 #define SIMPLE_IO_TIMEOUT       10000   /* in milliseconds */
 14 
 15 /*-------------------------------------------------------------------------*/
 16 
 17 static int override_alt = -1;
 18 module_param_named(alt, override_alt, int, 0644);
 19 MODULE_PARM_DESC(alt, ">= 0 to override altsetting selection");
 20 
 21 /*-------------------------------------------------------------------------*/
 22 
 23 /* FIXME make these public somewhere; usbdevfs.h? */
 24 struct usbtest_param {
 25         /* inputs */
 26         unsigned                test_num;       /* 0..(TEST_CASES-1) */
 27         unsigned                iterations;
 28         unsigned                length;
 29         unsigned                vary;
 30         unsigned                sglen;
 31 
 32         /* outputs */
 33         struct timeval          duration;
 34 };
 35 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
 36 
 37 /*-------------------------------------------------------------------------*/
 38 
 39 #define GENERIC         /* let probe() bind using module params */
 40 
 41 /* Some devices that can be used for testing will have "real" drivers.
 42  * Entries for those need to be enabled here by hand, after disabling
 43  * that "real" driver.
 44  */
 45 //#define       IBOT2           /* grab iBOT2 webcams */
 46 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
 47 
 48 /*-------------------------------------------------------------------------*/
 49 
 50 struct usbtest_info {
 51         const char              *name;
 52         u8                      ep_in;          /* bulk/intr source */
 53         u8                      ep_out;         /* bulk/intr sink */
 54         unsigned                autoconf:1;
 55         unsigned                ctrl_out:1;
 56         unsigned                iso:1;          /* try iso in/out */
 57         int                     alt;
 58 };
 59 
 60 /* this is accessed only through usbfs ioctl calls.
 61  * one ioctl to issue a test ... one lock per device.
 62  * tests create other threads if they need them.
 63  * urbs and buffers are allocated dynamically,
 64  * and data generated deterministically.
 65  */
 66 struct usbtest_dev {
 67         struct usb_interface    *intf;
 68         struct usbtest_info     *info;
 69         int                     in_pipe;
 70         int                     out_pipe;
 71         int                     in_iso_pipe;
 72         int                     out_iso_pipe;
 73         struct usb_endpoint_descriptor  *iso_in, *iso_out;
 74         struct mutex            lock;
 75 
 76 #define TBUF_SIZE       256
 77         u8                      *buf;
 78 };
 79 
 80 static struct usb_device *testdev_to_usbdev(struct usbtest_dev *test)
 81 {
 82         return interface_to_usbdev(test->intf);
 83 }
 84 
 85 /* set up all urbs so they can be used with either bulk or interrupt */
 86 #define INTERRUPT_RATE          1       /* msec/transfer */
 87 
 88 #define ERROR(tdev, fmt, args...) \
 89         dev_err(&(tdev)->intf->dev , fmt , ## args)
 90 #define WARNING(tdev, fmt, args...) \
 91         dev_warn(&(tdev)->intf->dev , fmt , ## args)
 92 
 93 #define GUARD_BYTE      0xA5
 94 
 95 /*-------------------------------------------------------------------------*/
 96 
 97 static int
 98 get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
 99 {
100         int                             tmp;
101         struct usb_host_interface       *alt;
102         struct usb_host_endpoint        *in, *out;
103         struct usb_host_endpoint        *iso_in, *iso_out;
104         struct usb_device               *udev;
105 
106         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
107                 unsigned        ep;
108 
109                 in = out = NULL;
110                 iso_in = iso_out = NULL;
111                 alt = intf->altsetting + tmp;
112 
113                 if (override_alt >= 0 &&
114                                 override_alt != alt->desc.bAlternateSetting)
115                         continue;
116 
117                 /* take the first altsetting with in-bulk + out-bulk;
118                  * ignore other endpoints and altsettings.
119                  */
120                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
121                         struct usb_host_endpoint        *e;
122 
123                         e = alt->endpoint + ep;
124                         switch (usb_endpoint_type(&e->desc)) {
125                         case USB_ENDPOINT_XFER_BULK:
126                                 break;
127                         case USB_ENDPOINT_XFER_ISOC:
128                                 if (dev->info->iso)
129                                         goto try_iso;
130                                 /* FALLTHROUGH */
131                         default:
132                                 continue;
133                         }
134                         if (usb_endpoint_dir_in(&e->desc)) {
135                                 if (!in)
136                                         in = e;
137                         } else {
138                                 if (!out)
139                                         out = e;
140                         }
141                         continue;
142 try_iso:
143                         if (usb_endpoint_dir_in(&e->desc)) {
144                                 if (!iso_in)
145                                         iso_in = e;
146                         } else {
147                                 if (!iso_out)
148                                         iso_out = e;
149                         }
150                 }
151                 if ((in && out)  ||  iso_in || iso_out)
152                         goto found;
153         }
154         return -EINVAL;
155 
156 found:
157         udev = testdev_to_usbdev(dev);
158         dev->info->alt = alt->desc.bAlternateSetting;
159         if (alt->desc.bAlternateSetting != 0) {
160                 tmp = usb_set_interface(udev,
161                                 alt->desc.bInterfaceNumber,
162                                 alt->desc.bAlternateSetting);
163                 if (tmp < 0)
164                         return tmp;
165         }
166 
167         if (in) {
168                 dev->in_pipe = usb_rcvbulkpipe(udev,
169                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
170                 dev->out_pipe = usb_sndbulkpipe(udev,
171                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
172         }
173         if (iso_in) {
174                 dev->iso_in = &iso_in->desc;
175                 dev->in_iso_pipe = usb_rcvisocpipe(udev,
176                                 iso_in->desc.bEndpointAddress
177                                         & USB_ENDPOINT_NUMBER_MASK);
178         }
179 
180         if (iso_out) {
181                 dev->iso_out = &iso_out->desc;
182                 dev->out_iso_pipe = usb_sndisocpipe(udev,
183                                 iso_out->desc.bEndpointAddress
184                                         & USB_ENDPOINT_NUMBER_MASK);
185         }
186         return 0;
187 }
188 
189 /*-------------------------------------------------------------------------*/
190 
191 /* Support for testing basic non-queued I/O streams.
192  *
193  * These just package urbs as requests that can be easily canceled.
194  * Each urb's data buffer is dynamically allocated; callers can fill
195  * them with non-zero test data (or test for it) when appropriate.
196  */
197 
198 static void simple_callback(struct urb *urb)
199 {
200         complete(urb->context);
201 }
202 
203 static struct urb *usbtest_alloc_urb(
204         struct usb_device       *udev,
205         int                     pipe,
206         unsigned long           bytes,
207         unsigned                transfer_flags,
208         unsigned                offset)
209 {
210         struct urb              *urb;
211 
212         urb = usb_alloc_urb(0, GFP_KERNEL);
213         if (!urb)
214                 return urb;
215         usb_fill_bulk_urb(urb, udev, pipe, NULL, bytes, simple_callback, NULL);
216         urb->interval = (udev->speed == USB_SPEED_HIGH)
217                         ? (INTERRUPT_RATE << 3)
218                         : INTERRUPT_RATE;
219         urb->transfer_flags = transfer_flags;
220         if (usb_pipein(pipe))
221                 urb->transfer_flags |= URB_SHORT_NOT_OK;
222 
223         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
224                 urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
225                         GFP_KERNEL, &urb->transfer_dma);
226         else
227                 urb->transfer_buffer = kmalloc(bytes + offset, GFP_KERNEL);
228 
229         if (!urb->transfer_buffer) {
230                 usb_free_urb(urb);
231                 return NULL;
232         }
233 
234         /* To test unaligned transfers add an offset and fill the
235                 unused memory with a guard value */
236         if (offset) {
237                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
238                 urb->transfer_buffer += offset;
239                 if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
240                         urb->transfer_dma += offset;
241         }
242 
243         /* For inbound transfers use guard byte so that test fails if
244                 data not correctly copied */
245         memset(urb->transfer_buffer,
246                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
247                         bytes);
248         return urb;
249 }
250 
251 static struct urb *simple_alloc_urb(
252         struct usb_device       *udev,
253         int                     pipe,
254         unsigned long           bytes)
255 {
256         return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0);
257 }
258 
259 static unsigned pattern;
260 static unsigned mod_pattern;
261 module_param_named(pattern, mod_pattern, uint, S_IRUGO | S_IWUSR);
262 MODULE_PARM_DESC(mod_pattern, "i/o pattern (0 == zeroes)");
263 
264 static inline void simple_fill_buf(struct urb *urb)
265 {
266         unsigned        i;
267         u8              *buf = urb->transfer_buffer;
268         unsigned        len = urb->transfer_buffer_length;
269 
270         switch (pattern) {
271         default:
272                 /* FALLTHROUGH */
273         case 0:
274                 memset(buf, 0, len);
275                 break;
276         case 1:                 /* mod63 */
277                 for (i = 0; i < len; i++)
278                         *buf++ = (u8) (i % 63);
279                 break;
280         }
281 }
282 
283 static inline unsigned long buffer_offset(void *buf)
284 {
285         return (unsigned long)buf & (ARCH_KMALLOC_MINALIGN - 1);
286 }
287 
288 static int check_guard_bytes(struct usbtest_dev *tdev, struct urb *urb)
289 {
290         u8 *buf = urb->transfer_buffer;
291         u8 *guard = buf - buffer_offset(buf);
292         unsigned i;
293 
294         for (i = 0; guard < buf; i++, guard++) {
295                 if (*guard != GUARD_BYTE) {
296                         ERROR(tdev, "guard byte[%d] %d (not %d)\n",
297                                 i, *guard, GUARD_BYTE);
298                         return -EINVAL;
299                 }
300         }
301         return 0;
302 }
303 
304 static int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb)
305 {
306         unsigned        i;
307         u8              expected;
308         u8              *buf = urb->transfer_buffer;
309         unsigned        len = urb->actual_length;
310 
311         int ret = check_guard_bytes(tdev, urb);
312         if (ret)
313                 return ret;
314 
315         for (i = 0; i < len; i++, buf++) {
316                 switch (pattern) {
317                 /* all-zeroes has no synchronization issues */
318                 case 0:
319                         expected = 0;
320                         break;
321                 /* mod63 stays in sync with short-terminated transfers,
322                  * or otherwise when host and gadget agree on how large
323                  * each usb transfer request should be.  resync is done
324                  * with set_interface or set_config.
325                  */
326                 case 1:                 /* mod63 */
327                         expected = i % 63;
328                         break;
329                 /* always fail unsupported patterns */
330                 default:
331                         expected = !*buf;
332                         break;
333                 }
334                 if (*buf == expected)
335                         continue;
336                 ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
337                 return -EINVAL;
338         }
339         return 0;
340 }
341 
342 static void simple_free_urb(struct urb *urb)
343 {
344         unsigned long offset = buffer_offset(urb->transfer_buffer);
345 
346         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
347                 usb_free_coherent(
348                         urb->dev,
349                         urb->transfer_buffer_length + offset,
350                         urb->transfer_buffer - offset,
351                         urb->transfer_dma - offset);
352         else
353                 kfree(urb->transfer_buffer - offset);
354         usb_free_urb(urb);
355 }
356 
357 static int simple_io(
358         struct usbtest_dev      *tdev,
359         struct urb              *urb,
360         int                     iterations,
361         int                     vary,
362         int                     expected,
363         const char              *label
364 )
365 {
366         struct usb_device       *udev = urb->dev;
367         int                     max = urb->transfer_buffer_length;
368         struct completion       completion;
369         int                     retval = 0;
370         unsigned long           expire;
371 
372         urb->context = &completion;
373         while (retval == 0 && iterations-- > 0) {
374                 init_completion(&completion);
375                 if (usb_pipeout(urb->pipe)) {
376                         simple_fill_buf(urb);
377                         urb->transfer_flags |= URB_ZERO_PACKET;
378                 }
379                 retval = usb_submit_urb(urb, GFP_KERNEL);
380                 if (retval != 0)
381                         break;
382 
383                 expire = msecs_to_jiffies(SIMPLE_IO_TIMEOUT);
384                 if (!wait_for_completion_timeout(&completion, expire)) {
385                         usb_kill_urb(urb);
386                         retval = (urb->status == -ENOENT ?
387                                   -ETIMEDOUT : urb->status);
388                 } else {
389                         retval = urb->status;
390                 }
391 
392                 urb->dev = udev;
393                 if (retval == 0 && usb_pipein(urb->pipe))
394                         retval = simple_check_buf(tdev, urb);
395 
396                 if (vary) {
397                         int     len = urb->transfer_buffer_length;
398 
399                         len += vary;
400                         len %= max;
401                         if (len == 0)
402                                 len = (vary < max) ? vary : max;
403                         urb->transfer_buffer_length = len;
404                 }
405 
406                 /* FIXME if endpoint halted, clear halt (and log) */
407         }
408         urb->transfer_buffer_length = max;
409 
410         if (expected != retval)
411                 dev_err(&udev->dev,
412                         "%s failed, iterations left %d, status %d (not %d)\n",
413                                 label, iterations, retval, expected);
414         return retval;
415 }
416 
417 
418 /*-------------------------------------------------------------------------*/
419 
420 /* We use scatterlist primitives to test queued I/O.
421  * Yes, this also tests the scatterlist primitives.
422  */
423 
424 static void free_sglist(struct scatterlist *sg, int nents)
425 {
426         unsigned                i;
427 
428         if (!sg)
429                 return;
430         for (i = 0; i < nents; i++) {
431                 if (!sg_page(&sg[i]))
432                         continue;
433                 kfree(sg_virt(&sg[i]));
434         }
435         kfree(sg);
436 }
437 
438 static struct scatterlist *
439 alloc_sglist(int nents, int max, int vary)
440 {
441         struct scatterlist      *sg;
442         unsigned                i;
443         unsigned                size = max;
444 
445         if (max == 0)
446                 return NULL;
447 
448         sg = kmalloc_array(nents, sizeof(*sg), GFP_KERNEL);
449         if (!sg)
450                 return NULL;
451         sg_init_table(sg, nents);
452 
453         for (i = 0; i < nents; i++) {
454                 char            *buf;
455                 unsigned        j;
456 
457                 buf = kzalloc(size, GFP_KERNEL);
458                 if (!buf) {
459                         free_sglist(sg, i);
460                         return NULL;
461                 }
462 
463                 /* kmalloc pages are always physically contiguous! */
464                 sg_set_buf(&sg[i], buf, size);
465 
466                 switch (pattern) {
467                 case 0:
468                         /* already zeroed */
469                         break;
470                 case 1:
471                         for (j = 0; j < size; j++)
472                                 *buf++ = (u8) (j % 63);
473                         break;
474                 }
475 
476                 if (vary) {
477                         size += vary;
478                         size %= max;
479                         if (size == 0)
480                                 size = (vary < max) ? vary : max;
481                 }
482         }
483 
484         return sg;
485 }
486 
487 static int perform_sglist(
488         struct usbtest_dev      *tdev,
489         unsigned                iterations,
490         int                     pipe,
491         struct usb_sg_request   *req,
492         struct scatterlist      *sg,
493         int                     nents
494 )
495 {
496         struct usb_device       *udev = testdev_to_usbdev(tdev);
497         int                     retval = 0;
498 
499         while (retval == 0 && iterations-- > 0) {
500                 retval = usb_sg_init(req, udev, pipe,
501                                 (udev->speed == USB_SPEED_HIGH)
502                                         ? (INTERRUPT_RATE << 3)
503                                         : INTERRUPT_RATE,
504                                 sg, nents, 0, GFP_KERNEL);
505 
506                 if (retval)
507                         break;
508                 usb_sg_wait(req);
509                 retval = req->status;
510 
511                 /* FIXME check resulting data pattern */
512 
513                 /* FIXME if endpoint halted, clear halt (and log) */
514         }
515 
516         /* FIXME for unlink or fault handling tests, don't report
517          * failure if retval is as we expected ...
518          */
519         if (retval)
520                 ERROR(tdev, "perform_sglist failed, "
521                                 "iterations left %d, status %d\n",
522                                 iterations, retval);
523         return retval;
524 }
525 
526 
527 /*-------------------------------------------------------------------------*/
528 
529 /* unqueued control message testing
530  *
531  * there's a nice set of device functional requirements in chapter 9 of the
532  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
533  * special test firmware.
534  *
535  * we know the device is configured (or suspended) by the time it's visible
536  * through usbfs.  we can't change that, so we won't test enumeration (which
537  * worked 'well enough' to get here, this time), power management (ditto),
538  * or remote wakeup (which needs human interaction).
539  */
540 
541 static unsigned realworld = 1;
542 module_param(realworld, uint, 0);
543 MODULE_PARM_DESC(realworld, "clear to demand stricter spec compliance");
544 
545 static int get_altsetting(struct usbtest_dev *dev)
546 {
547         struct usb_interface    *iface = dev->intf;
548         struct usb_device       *udev = interface_to_usbdev(iface);
549         int                     retval;
550 
551         retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
552                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
553                         0, iface->altsetting[0].desc.bInterfaceNumber,
554                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
555         switch (retval) {
556         case 1:
557                 return dev->buf[0];
558         case 0:
559                 retval = -ERANGE;
560                 /* FALLTHROUGH */
561         default:
562                 return retval;
563         }
564 }
565 
566 static int set_altsetting(struct usbtest_dev *dev, int alternate)
567 {
568         struct usb_interface            *iface = dev->intf;
569         struct usb_device               *udev;
570 
571         if (alternate < 0 || alternate >= 256)
572                 return -EINVAL;
573 
574         udev = interface_to_usbdev(iface);
575         return usb_set_interface(udev,
576                         iface->altsetting[0].desc.bInterfaceNumber,
577                         alternate);
578 }
579 
580 static int is_good_config(struct usbtest_dev *tdev, int len)
581 {
582         struct usb_config_descriptor    *config;
583 
584         if (len < sizeof(*config))
585                 return 0;
586         config = (struct usb_config_descriptor *) tdev->buf;
587 
588         switch (config->bDescriptorType) {
589         case USB_DT_CONFIG:
590         case USB_DT_OTHER_SPEED_CONFIG:
591                 if (config->bLength != 9) {
592                         ERROR(tdev, "bogus config descriptor length\n");
593                         return 0;
594                 }
595                 /* this bit 'must be 1' but often isn't */
596                 if (!realworld && !(config->bmAttributes & 0x80)) {
597                         ERROR(tdev, "high bit of config attributes not set\n");
598                         return 0;
599                 }
600                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
601                         ERROR(tdev, "reserved config bits set\n");
602                         return 0;
603                 }
604                 break;
605         default:
606                 return 0;
607         }
608 
609         if (le16_to_cpu(config->wTotalLength) == len)   /* read it all */
610                 return 1;
611         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)     /* max partial read */
612                 return 1;
613         ERROR(tdev, "bogus config descriptor read size\n");
614         return 0;
615 }
616 
617 static int is_good_ext(struct usbtest_dev *tdev, u8 *buf)
618 {
619         struct usb_ext_cap_descriptor *ext;
620         u32 attr;
621 
622         ext = (struct usb_ext_cap_descriptor *) buf;
623 
624         if (ext->bLength != USB_DT_USB_EXT_CAP_SIZE) {
625                 ERROR(tdev, "bogus usb 2.0 extension descriptor length\n");
626                 return 0;
627         }
628 
629         attr = le32_to_cpu(ext->bmAttributes);
630         /* bits[1:15] is used and others are reserved */
631         if (attr & ~0xfffe) {   /* reserved == 0 */
632                 ERROR(tdev, "reserved bits set\n");
633                 return 0;
634         }
635 
636         return 1;
637 }
638 
639 static int is_good_ss_cap(struct usbtest_dev *tdev, u8 *buf)
640 {
641         struct usb_ss_cap_descriptor *ss;
642 
643         ss = (struct usb_ss_cap_descriptor *) buf;
644 
645         if (ss->bLength != USB_DT_USB_SS_CAP_SIZE) {
646                 ERROR(tdev, "bogus superspeed device capability descriptor length\n");
647                 return 0;
648         }
649 
650         /*
651          * only bit[1] of bmAttributes is used for LTM and others are
652          * reserved
653          */
654         if (ss->bmAttributes & ~0x02) { /* reserved == 0 */
655                 ERROR(tdev, "reserved bits set in bmAttributes\n");
656                 return 0;
657         }
658 
659         /* bits[0:3] of wSpeedSupported is used and others are reserved */
660         if (le16_to_cpu(ss->wSpeedSupported) & ~0x0f) { /* reserved == 0 */
661                 ERROR(tdev, "reserved bits set in wSpeedSupported\n");
662                 return 0;
663         }
664 
665         return 1;
666 }
667 
668 static int is_good_con_id(struct usbtest_dev *tdev, u8 *buf)
669 {
670         struct usb_ss_container_id_descriptor *con_id;
671 
672         con_id = (struct usb_ss_container_id_descriptor *) buf;
673 
674         if (con_id->bLength != USB_DT_USB_SS_CONTN_ID_SIZE) {
675                 ERROR(tdev, "bogus container id descriptor length\n");
676                 return 0;
677         }
678 
679         if (con_id->bReserved) {        /* reserved == 0 */
680                 ERROR(tdev, "reserved bits set\n");
681                 return 0;
682         }
683 
684         return 1;
685 }
686 
687 /* sanity test for standard requests working with usb_control_mesg() and some
688  * of the utility functions which use it.
689  *
690  * this doesn't test how endpoint halts behave or data toggles get set, since
691  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
692  * halt or toggle).  toggle testing is impractical without support from hcds.
693  *
694  * this avoids failing devices linux would normally work with, by not testing
695  * config/altsetting operations for devices that only support their defaults.
696  * such devices rarely support those needless operations.
697  *
698  * NOTE that since this is a sanity test, it's not examining boundary cases
699  * to see if usbcore, hcd, and device all behave right.  such testing would
700  * involve varied read sizes and other operation sequences.
701  */
702 static int ch9_postconfig(struct usbtest_dev *dev)
703 {
704         struct usb_interface    *iface = dev->intf;
705         struct usb_device       *udev = interface_to_usbdev(iface);
706         int                     i, alt, retval;
707 
708         /* [9.2.3] if there's more than one altsetting, we need to be able to
709          * set and get each one.  mostly trusts the descriptors from usbcore.
710          */
711         for (i = 0; i < iface->num_altsetting; i++) {
712 
713                 /* 9.2.3 constrains the range here */
714                 alt = iface->altsetting[i].desc.bAlternateSetting;
715                 if (alt < 0 || alt >= iface->num_altsetting) {
716                         dev_err(&iface->dev,
717                                         "invalid alt [%d].bAltSetting = %d\n",
718                                         i, alt);
719                 }
720 
721                 /* [real world] get/set unimplemented if there's only one */
722                 if (realworld && iface->num_altsetting == 1)
723                         continue;
724 
725                 /* [9.4.10] set_interface */
726                 retval = set_altsetting(dev, alt);
727                 if (retval) {
728                         dev_err(&iface->dev, "can't set_interface = %d, %d\n",
729                                         alt, retval);
730                         return retval;
731                 }
732 
733                 /* [9.4.4] get_interface always works */
734                 retval = get_altsetting(dev);
735                 if (retval != alt) {
736                         dev_err(&iface->dev, "get alt should be %d, was %d\n",
737                                         alt, retval);
738                         return (retval < 0) ? retval : -EDOM;
739                 }
740 
741         }
742 
743         /* [real world] get_config unimplemented if there's only one */
744         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
745                 int     expected = udev->actconfig->desc.bConfigurationValue;
746 
747                 /* [9.4.2] get_configuration always works
748                  * ... although some cheap devices (like one TI Hub I've got)
749                  * won't return config descriptors except before set_config.
750                  */
751                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
752                                 USB_REQ_GET_CONFIGURATION,
753                                 USB_DIR_IN | USB_RECIP_DEVICE,
754                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
755                 if (retval != 1 || dev->buf[0] != expected) {
756                         dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
757                                 retval, dev->buf[0], expected);
758                         return (retval < 0) ? retval : -EDOM;
759                 }
760         }
761 
762         /* there's always [9.4.3] a device descriptor [9.6.1] */
763         retval = usb_get_descriptor(udev, USB_DT_DEVICE, 0,
764                         dev->buf, sizeof(udev->descriptor));
765         if (retval != sizeof(udev->descriptor)) {
766                 dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
767                 return (retval < 0) ? retval : -EDOM;
768         }
769 
770         /*
771          * there's always [9.4.3] a bos device descriptor [9.6.2] in USB
772          * 3.0 spec
773          */
774         if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0210) {
775                 struct usb_bos_descriptor *bos = NULL;
776                 struct usb_dev_cap_header *header = NULL;
777                 unsigned total, num, length;
778                 u8 *buf;
779 
780                 retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
781                                 sizeof(*udev->bos->desc));
782                 if (retval != sizeof(*udev->bos->desc)) {
783                         dev_err(&iface->dev, "bos descriptor --> %d\n", retval);
784                         return (retval < 0) ? retval : -EDOM;
785                 }
786 
787                 bos = (struct usb_bos_descriptor *)dev->buf;
788                 total = le16_to_cpu(bos->wTotalLength);
789                 num = bos->bNumDeviceCaps;
790 
791                 if (total > TBUF_SIZE)
792                         total = TBUF_SIZE;
793 
794                 /*
795                  * get generic device-level capability descriptors [9.6.2]
796                  * in USB 3.0 spec
797                  */
798                 retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
799                                 total);
800                 if (retval != total) {
801                         dev_err(&iface->dev, "bos descriptor set --> %d\n",
802                                         retval);
803                         return (retval < 0) ? retval : -EDOM;
804                 }
805 
806                 length = sizeof(*udev->bos->desc);
807                 buf = dev->buf;
808                 for (i = 0; i < num; i++) {
809                         buf += length;
810                         if (buf + sizeof(struct usb_dev_cap_header) >
811                                         dev->buf + total)
812                                 break;
813 
814                         header = (struct usb_dev_cap_header *)buf;
815                         length = header->bLength;
816 
817                         if (header->bDescriptorType !=
818                                         USB_DT_DEVICE_CAPABILITY) {
819                                 dev_warn(&udev->dev, "not device capability descriptor, skip\n");
820                                 continue;
821                         }
822 
823                         switch (header->bDevCapabilityType) {
824                         case USB_CAP_TYPE_EXT:
825                                 if (buf + USB_DT_USB_EXT_CAP_SIZE >
826                                                 dev->buf + total ||
827                                                 !is_good_ext(dev, buf)) {
828                                         dev_err(&iface->dev, "bogus usb 2.0 extension descriptor\n");
829                                         return -EDOM;
830                                 }
831                                 break;
832                         case USB_SS_CAP_TYPE:
833                                 if (buf + USB_DT_USB_SS_CAP_SIZE >
834                                                 dev->buf + total ||
835                                                 !is_good_ss_cap(dev, buf)) {
836                                         dev_err(&iface->dev, "bogus superspeed device capability descriptor\n");
837                                         return -EDOM;
838                                 }
839                                 break;
840                         case CONTAINER_ID_TYPE:
841                                 if (buf + USB_DT_USB_SS_CONTN_ID_SIZE >
842                                                 dev->buf + total ||
843                                                 !is_good_con_id(dev, buf)) {
844                                         dev_err(&iface->dev, "bogus container id descriptor\n");
845                                         return -EDOM;
846                                 }
847                                 break;
848                         default:
849                                 break;
850                         }
851                 }
852         }
853 
854         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
855         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
856                 retval = usb_get_descriptor(udev, USB_DT_CONFIG, i,
857                                 dev->buf, TBUF_SIZE);
858                 if (!is_good_config(dev, retval)) {
859                         dev_err(&iface->dev,
860                                         "config [%d] descriptor --> %d\n",
861                                         i, retval);
862                         return (retval < 0) ? retval : -EDOM;
863                 }
864 
865                 /* FIXME cross-checking udev->config[i] to make sure usbcore
866                  * parsed it right (etc) would be good testing paranoia
867                  */
868         }
869 
870         /* and sometimes [9.2.6.6] speed dependent descriptors */
871         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
872                 struct usb_qualifier_descriptor *d = NULL;
873 
874                 /* device qualifier [9.6.2] */
875                 retval = usb_get_descriptor(udev,
876                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
877                                 sizeof(struct usb_qualifier_descriptor));
878                 if (retval == -EPIPE) {
879                         if (udev->speed == USB_SPEED_HIGH) {
880                                 dev_err(&iface->dev,
881                                                 "hs dev qualifier --> %d\n",
882                                                 retval);
883                                 return (retval < 0) ? retval : -EDOM;
884                         }
885                         /* usb2.0 but not high-speed capable; fine */
886                 } else if (retval != sizeof(struct usb_qualifier_descriptor)) {
887                         dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
888                         return (retval < 0) ? retval : -EDOM;
889                 } else
890                         d = (struct usb_qualifier_descriptor *) dev->buf;
891 
892                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
893                 if (d) {
894                         unsigned max = d->bNumConfigurations;
895                         for (i = 0; i < max; i++) {
896                                 retval = usb_get_descriptor(udev,
897                                         USB_DT_OTHER_SPEED_CONFIG, i,
898                                         dev->buf, TBUF_SIZE);
899                                 if (!is_good_config(dev, retval)) {
900                                         dev_err(&iface->dev,
901                                                 "other speed config --> %d\n",
902                                                 retval);
903                                         return (retval < 0) ? retval : -EDOM;
904                                 }
905                         }
906                 }
907         }
908         /* FIXME fetch strings from at least the device descriptor */
909 
910         /* [9.4.5] get_status always works */
911         retval = usb_get_status(udev, USB_RECIP_DEVICE, 0, dev->buf);
912         if (retval) {
913                 dev_err(&iface->dev, "get dev status --> %d\n", retval);
914                 return retval;
915         }
916 
917         /* FIXME configuration.bmAttributes says if we could try to set/clear
918          * the device's remote wakeup feature ... if we can, test that here
919          */
920 
921         retval = usb_get_status(udev, USB_RECIP_INTERFACE,
922                         iface->altsetting[0].desc.bInterfaceNumber, dev->buf);
923         if (retval) {
924                 dev_err(&iface->dev, "get interface status --> %d\n", retval);
925                 return retval;
926         }
927         /* FIXME get status for each endpoint in the interface */
928 
929         return 0;
930 }
931 
932 /*-------------------------------------------------------------------------*/
933 
934 /* use ch9 requests to test whether:
935  *   (a) queues work for control, keeping N subtests queued and
936  *       active (auto-resubmit) for M loops through the queue.
937  *   (b) protocol stalls (control-only) will autorecover.
938  *       it's not like bulk/intr; no halt clearing.
939  *   (c) short control reads are reported and handled.
940  *   (d) queues are always processed in-order
941  */
942 
943 struct ctrl_ctx {
944         spinlock_t              lock;
945         struct usbtest_dev      *dev;
946         struct completion       complete;
947         unsigned                count;
948         unsigned                pending;
949         int                     status;
950         struct urb              **urb;
951         struct usbtest_param    *param;
952         int                     last;
953 };
954 
955 #define NUM_SUBCASES    16              /* how many test subcases here? */
956 
957 struct subcase {
958         struct usb_ctrlrequest  setup;
959         int                     number;
960         int                     expected;
961 };
962 
963 static void ctrl_complete(struct urb *urb)
964 {
965         struct ctrl_ctx         *ctx = urb->context;
966         struct usb_ctrlrequest  *reqp;
967         struct subcase          *subcase;
968         int                     status = urb->status;
969 
970         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
971         subcase = container_of(reqp, struct subcase, setup);
972 
973         spin_lock(&ctx->lock);
974         ctx->count--;
975         ctx->pending--;
976 
977         /* queue must transfer and complete in fifo order, unless
978          * usb_unlink_urb() is used to unlink something not at the
979          * physical queue head (not tested).
980          */
981         if (subcase->number > 0) {
982                 if ((subcase->number - ctx->last) != 1) {
983                         ERROR(ctx->dev,
984                                 "subcase %d completed out of order, last %d\n",
985                                 subcase->number, ctx->last);
986                         status = -EDOM;
987                         ctx->last = subcase->number;
988                         goto error;
989                 }
990         }
991         ctx->last = subcase->number;
992 
993         /* succeed or fault in only one way? */
994         if (status == subcase->expected)
995                 status = 0;
996 
997         /* async unlink for cleanup? */
998         else if (status != -ECONNRESET) {
999 
1000                 /* some faults are allowed, not required */
1001                 if (subcase->expected > 0 && (
1002                           ((status == -subcase->expected        /* happened */
1003                            || status == 0))))                   /* didn't */
1004                         status = 0;
1005                 /* sometimes more than one fault is allowed */
1006                 else if (subcase->number == 12 && status == -EPIPE)
1007                         status = 0;
1008                 else
1009                         ERROR(ctx->dev, "subtest %d error, status %d\n",
1010                                         subcase->number, status);
1011         }
1012 
1013         /* unexpected status codes mean errors; ideally, in hardware */
1014         if (status) {
1015 error:
1016                 if (ctx->status == 0) {
1017                         int             i;
1018 
1019                         ctx->status = status;
1020                         ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
1021                                         "%d left, subcase %d, len %d/%d\n",
1022                                         reqp->bRequestType, reqp->bRequest,
1023                                         status, ctx->count, subcase->number,
1024                                         urb->actual_length,
1025                                         urb->transfer_buffer_length);
1026 
1027                         /* FIXME this "unlink everything" exit route should
1028                          * be a separate test case.
1029                          */
1030 
1031                         /* unlink whatever's still pending */
1032                         for (i = 1; i < ctx->param->sglen; i++) {
1033                                 struct urb *u = ctx->urb[
1034                                                         (i + subcase->number)
1035                                                         % ctx->param->sglen];
1036 
1037                                 if (u == urb || !u->dev)
1038                                         continue;
1039                                 spin_unlock(&ctx->lock);
1040                                 status = usb_unlink_urb(u);
1041                                 spin_lock(&ctx->lock);
1042                                 switch (status) {
1043                                 case -EINPROGRESS:
1044                                 case -EBUSY:
1045                                 case -EIDRM:
1046                                         continue;
1047                                 default:
1048                                         ERROR(ctx->dev, "urb unlink --> %d\n",
1049                                                         status);
1050                                 }
1051                         }
1052                         status = ctx->status;
1053                 }
1054         }
1055 
1056         /* resubmit if we need to, else mark this as done */
1057         if ((status == 0) && (ctx->pending < ctx->count)) {
1058                 status = usb_submit_urb(urb, GFP_ATOMIC);
1059                 if (status != 0) {
1060                         ERROR(ctx->dev,
1061                                 "can't resubmit ctrl %02x.%02x, err %d\n",
1062                                 reqp->bRequestType, reqp->bRequest, status);
1063                         urb->dev = NULL;
1064                 } else
1065                         ctx->pending++;
1066         } else
1067                 urb->dev = NULL;
1068 
1069         /* signal completion when nothing's queued */
1070         if (ctx->pending == 0)
1071                 complete(&ctx->complete);
1072         spin_unlock(&ctx->lock);
1073 }
1074 
1075 static int
1076 test_ctrl_queue(struct usbtest_dev *dev, struct usbtest_param *param)
1077 {
1078         struct usb_device       *udev = testdev_to_usbdev(dev);
1079         struct urb              **urb;
1080         struct ctrl_ctx         context;
1081         int                     i;
1082 
1083         if (param->sglen == 0 || param->iterations > UINT_MAX / param->sglen)
1084                 return -EOPNOTSUPP;
1085 
1086         spin_lock_init(&context.lock);
1087         context.dev = dev;
1088         init_completion(&context.complete);
1089         context.count = param->sglen * param->iterations;
1090         context.pending = 0;
1091         context.status = -ENOMEM;
1092         context.param = param;
1093         context.last = -1;
1094 
1095         /* allocate and init the urbs we'll queue.
1096          * as with bulk/intr sglists, sglen is the queue depth; it also
1097          * controls which subtests run (more tests than sglen) or rerun.
1098          */
1099         urb = kcalloc(param->sglen, sizeof(struct urb *), GFP_KERNEL);
1100         if (!urb)
1101                 return -ENOMEM;
1102         for (i = 0; i < param->sglen; i++) {
1103                 int                     pipe = usb_rcvctrlpipe(udev, 0);
1104                 unsigned                len;
1105                 struct urb              *u;
1106                 struct usb_ctrlrequest  req;
1107                 struct subcase          *reqp;
1108 
1109                 /* sign of this variable means:
1110                  *  -: tested code must return this (negative) error code
1111                  *  +: tested code may return this (negative too) error code
1112                  */
1113                 int                     expected = 0;
1114 
1115                 /* requests here are mostly expected to succeed on any
1116                  * device, but some are chosen to trigger protocol stalls
1117                  * or short reads.
1118                  */
1119                 memset(&req, 0, sizeof(req));
1120                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
1121                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
1122 
1123                 switch (i % NUM_SUBCASES) {
1124                 case 0:         /* get device descriptor */
1125                         req.wValue = cpu_to_le16(USB_DT_DEVICE << 8);
1126                         len = sizeof(struct usb_device_descriptor);
1127                         break;
1128                 case 1:         /* get first config descriptor (only) */
1129                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1130                         len = sizeof(struct usb_config_descriptor);
1131                         break;
1132                 case 2:         /* get altsetting (OFTEN STALLS) */
1133                         req.bRequest = USB_REQ_GET_INTERFACE;
1134                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
1135                         /* index = 0 means first interface */
1136                         len = 1;
1137                         expected = EPIPE;
1138                         break;
1139                 case 3:         /* get interface status */
1140                         req.bRequest = USB_REQ_GET_STATUS;
1141                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
1142                         /* interface 0 */
1143                         len = 2;
1144                         break;
1145                 case 4:         /* get device status */
1146                         req.bRequest = USB_REQ_GET_STATUS;
1147                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
1148                         len = 2;
1149                         break;
1150                 case 5:         /* get device qualifier (MAY STALL) */
1151                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
1152                         len = sizeof(struct usb_qualifier_descriptor);
1153                         if (udev->speed != USB_SPEED_HIGH)
1154                                 expected = EPIPE;
1155                         break;
1156                 case 6:         /* get first config descriptor, plus interface */
1157                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1158                         len = sizeof(struct usb_config_descriptor);
1159                         len += sizeof(struct usb_interface_descriptor);
1160                         break;
1161                 case 7:         /* get interface descriptor (ALWAYS STALLS) */
1162                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
1163                         /* interface == 0 */
1164                         len = sizeof(struct usb_interface_descriptor);
1165                         expected = -EPIPE;
1166                         break;
1167                 /* NOTE: two consecutive stalls in the queue here.
1168                  *  that tests fault recovery a bit more aggressively. */
1169                 case 8:         /* clear endpoint halt (MAY STALL) */
1170                         req.bRequest = USB_REQ_CLEAR_FEATURE;
1171                         req.bRequestType = USB_RECIP_ENDPOINT;
1172                         /* wValue 0 == ep halt */
1173                         /* wIndex 0 == ep0 (shouldn't halt!) */
1174                         len = 0;
1175                         pipe = usb_sndctrlpipe(udev, 0);
1176                         expected = EPIPE;
1177                         break;
1178                 case 9:         /* get endpoint status */
1179                         req.bRequest = USB_REQ_GET_STATUS;
1180                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
1181                         /* endpoint 0 */
1182                         len = 2;
1183                         break;
1184                 case 10:        /* trigger short read (EREMOTEIO) */
1185                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1186                         len = 1024;
1187                         expected = -EREMOTEIO;
1188                         break;
1189                 /* NOTE: two consecutive _different_ faults in the queue. */
1190                 case 11:        /* get endpoint descriptor (ALWAYS STALLS) */
1191                         req.wValue = cpu_to_le16(USB_DT_ENDPOINT << 8);
1192                         /* endpoint == 0 */
1193                         len = sizeof(struct usb_interface_descriptor);
1194                         expected = EPIPE;
1195                         break;
1196                 /* NOTE: sometimes even a third fault in the queue! */
1197                 case 12:        /* get string 0 descriptor (MAY STALL) */
1198                         req.wValue = cpu_to_le16(USB_DT_STRING << 8);
1199                         /* string == 0, for language IDs */
1200                         len = sizeof(struct usb_interface_descriptor);
1201                         /* may succeed when > 4 languages */
1202                         expected = EREMOTEIO;   /* or EPIPE, if no strings */
1203                         break;
1204                 case 13:        /* short read, resembling case 10 */
1205                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1206                         /* last data packet "should" be DATA1, not DATA0 */
1207                         if (udev->speed == USB_SPEED_SUPER)
1208                                 len = 1024 - 512;
1209                         else
1210                                 len = 1024 - udev->descriptor.bMaxPacketSize0;
1211                         expected = -EREMOTEIO;
1212                         break;
1213                 case 14:        /* short read; try to fill the last packet */
1214                         req.wValue = cpu_to_le16((USB_DT_DEVICE << 8) | 0);
1215                         /* device descriptor size == 18 bytes */
1216                         len = udev->descriptor.bMaxPacketSize0;
1217                         if (udev->speed == USB_SPEED_SUPER)
1218                                 len = 512;
1219                         switch (len) {
1220                         case 8:
1221                                 len = 24;
1222                                 break;
1223                         case 16:
1224                                 len = 32;
1225                                 break;
1226                         }
1227                         expected = -EREMOTEIO;
1228                         break;
1229                 case 15:
1230                         req.wValue = cpu_to_le16(USB_DT_BOS << 8);
1231                         if (udev->bos)
1232                                 len = le16_to_cpu(udev->bos->desc->wTotalLength);
1233                         else
1234                                 len = sizeof(struct usb_bos_descriptor);
1235                         if (le16_to_cpu(udev->descriptor.bcdUSB) < 0x0201)
1236                                 expected = -EPIPE;
1237                         break;
1238                 default:
1239                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
1240                         context.status = -EINVAL;
1241                         goto cleanup;
1242                 }
1243                 req.wLength = cpu_to_le16(len);
1244                 urb[i] = u = simple_alloc_urb(udev, pipe, len);
1245                 if (!u)
1246                         goto cleanup;
1247 
1248                 reqp = kmalloc(sizeof(*reqp), GFP_KERNEL);
1249                 if (!reqp)
1250                         goto cleanup;
1251                 reqp->setup = req;
1252                 reqp->number = i % NUM_SUBCASES;
1253                 reqp->expected = expected;
1254                 u->setup_packet = (char *) &reqp->setup;
1255 
1256                 u->context = &context;
1257                 u->complete = ctrl_complete;
1258         }
1259 
1260         /* queue the urbs */
1261         context.urb = urb;
1262         spin_lock_irq(&context.lock);
1263         for (i = 0; i < param->sglen; i++) {
1264                 context.status = usb_submit_urb(urb[i], GFP_ATOMIC);
1265                 if (context.status != 0) {
1266                         ERROR(dev, "can't submit urb[%d], status %d\n",
1267                                         i, context.status);
1268                         context.count = context.pending;
1269                         break;
1270                 }
1271                 context.pending++;
1272         }
1273         spin_unlock_irq(&context.lock);
1274 
1275         /* FIXME  set timer and time out; provide a disconnect hook */
1276 
1277         /* wait for the last one to complete */
1278         if (context.pending > 0)
1279                 wait_for_completion(&context.complete);
1280 
1281 cleanup:
1282         for (i = 0; i < param->sglen; i++) {
1283                 if (!urb[i])
1284                         continue;
1285                 urb[i]->dev = udev;
1286                 kfree(urb[i]->setup_packet);
1287                 simple_free_urb(urb[i]);
1288         }
1289         kfree(urb);
1290         return context.status;
1291 }
1292 #undef NUM_SUBCASES
1293 
1294 
1295 /*-------------------------------------------------------------------------*/
1296 
1297 static void unlink1_callback(struct urb *urb)
1298 {
1299         int     status = urb->status;
1300 
1301         /* we "know" -EPIPE (stall) never happens */
1302         if (!status)
1303                 status = usb_submit_urb(urb, GFP_ATOMIC);
1304         if (status) {
1305                 urb->status = status;
1306                 complete(urb->context);
1307         }
1308 }
1309 
1310 static int unlink1(struct usbtest_dev *dev, int pipe, int size, int async)
1311 {
1312         struct urb              *urb;
1313         struct completion       completion;
1314         int                     retval = 0;
1315 
1316         init_completion(&completion);
1317         urb = simple_alloc_urb(testdev_to_usbdev(dev), pipe, size);
1318         if (!urb)
1319                 return -ENOMEM;
1320         urb->context = &completion;
1321         urb->complete = unlink1_callback;
1322 
1323         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1324          * states, and testing should get to all of them over time.
1325          *
1326          * FIXME want additional tests for when endpoint is STALLing
1327          * due to errors, or is just NAKing requests.
1328          */
1329         retval = usb_submit_urb(urb, GFP_KERNEL);
1330         if (retval != 0) {
1331                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1332                 return retval;
1333         }
1334 
1335         /* unlinking that should always work.  variable delay tests more
1336          * hcd states and code paths, even with little other system load.
1337          */
1338         msleep(jiffies % (2 * INTERRUPT_RATE));
1339         if (async) {
1340                 while (!completion_done(&completion)) {
1341                         retval = usb_unlink_urb(urb);
1342 
1343                         switch (retval) {
1344                         case -EBUSY:
1345                         case -EIDRM:
1346                                 /* we can't unlink urbs while they're completing
1347                                  * or if they've completed, and we haven't
1348                                  * resubmitted. "normal" drivers would prevent
1349                                  * resubmission, but since we're testing unlink
1350                                  * paths, we can't.
1351                                  */
1352                                 ERROR(dev, "unlink retry\n");
1353                                 continue;
1354                         case 0:
1355                         case -EINPROGRESS:
1356                                 break;
1357 
1358                         default:
1359                                 dev_err(&dev->intf->dev,
1360                                         "unlink fail %d\n", retval);
1361                                 return retval;
1362                         }
1363 
1364                         break;
1365                 }
1366         } else
1367                 usb_kill_urb(urb);
1368 
1369         wait_for_completion(&completion);
1370         retval = urb->status;
1371         simple_free_urb(urb);
1372 
1373         if (async)
1374                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1375         else
1376                 return (retval == -ENOENT || retval == -EPERM) ?
1377                                 0 : retval - 2000;
1378 }
1379 
1380 static int unlink_simple(struct usbtest_dev *dev, int pipe, int len)
1381 {
1382         int                     retval = 0;
1383 
1384         /* test sync and async paths */
1385         retval = unlink1(dev, pipe, len, 1);
1386         if (!retval)
1387                 retval = unlink1(dev, pipe, len, 0);
1388         return retval;
1389 }
1390 
1391 /*-------------------------------------------------------------------------*/
1392 
1393 struct queued_ctx {
1394         struct completion       complete;
1395         atomic_t                pending;
1396         unsigned                num;
1397         int                     status;
1398         struct urb              **urbs;
1399 };
1400 
1401 static void unlink_queued_callback(struct urb *urb)
1402 {
1403         int                     status = urb->status;
1404         struct queued_ctx       *ctx = urb->context;
1405 
1406         if (ctx->status)
1407                 goto done;
1408         if (urb == ctx->urbs[ctx->num - 4] || urb == ctx->urbs[ctx->num - 2]) {
1409                 if (status == -ECONNRESET)
1410                         goto done;
1411                 /* What error should we report if the URB completed normally? */
1412         }
1413         if (status != 0)
1414                 ctx->status = status;
1415 
1416  done:
1417         if (atomic_dec_and_test(&ctx->pending))
1418                 complete(&ctx->complete);
1419 }
1420 
1421 static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num,
1422                 unsigned size)
1423 {
1424         struct queued_ctx       ctx;
1425         struct usb_device       *udev = testdev_to_usbdev(dev);
1426         void                    *buf;
1427         dma_addr_t              buf_dma;
1428         int                     i;
1429         int                     retval = -ENOMEM;
1430 
1431         init_completion(&ctx.complete);
1432         atomic_set(&ctx.pending, 1);    /* One more than the actual value */
1433         ctx.num = num;
1434         ctx.status = 0;
1435 
1436         buf = usb_alloc_coherent(udev, size, GFP_KERNEL, &buf_dma);
1437         if (!buf)
1438                 return retval;
1439         memset(buf, 0, size);
1440 
1441         /* Allocate and init the urbs we'll queue */
1442         ctx.urbs = kcalloc(num, sizeof(struct urb *), GFP_KERNEL);
1443         if (!ctx.urbs)
1444                 goto free_buf;
1445         for (i = 0; i < num; i++) {
1446                 ctx.urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1447                 if (!ctx.urbs[i])
1448                         goto free_urbs;
1449                 usb_fill_bulk_urb(ctx.urbs[i], udev, pipe, buf, size,
1450                                 unlink_queued_callback, &ctx);
1451                 ctx.urbs[i]->transfer_dma = buf_dma;
1452                 ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1453         }
1454 
1455         /* Submit all the URBs and then unlink URBs num - 4 and num - 2. */
1456         for (i = 0; i < num; i++) {
1457                 atomic_inc(&ctx.pending);
1458                 retval = usb_submit_urb(ctx.urbs[i], GFP_KERNEL);
1459                 if (retval != 0) {
1460                         dev_err(&dev->intf->dev, "submit urbs[%d] fail %d\n",
1461                                         i, retval);
1462                         atomic_dec(&ctx.pending);
1463                         ctx.status = retval;
1464                         break;
1465                 }
1466         }
1467         if (i == num) {
1468                 usb_unlink_urb(ctx.urbs[num - 4]);
1469                 usb_unlink_urb(ctx.urbs[num - 2]);
1470         } else {
1471                 while (--i >= 0)
1472                         usb_unlink_urb(ctx.urbs[i]);
1473         }
1474 
1475         if (atomic_dec_and_test(&ctx.pending))          /* The extra count */
1476                 complete(&ctx.complete);
1477         wait_for_completion(&ctx.complete);
1478         retval = ctx.status;
1479 
1480  free_urbs:
1481         for (i = 0; i < num; i++)
1482                 usb_free_urb(ctx.urbs[i]);
1483         kfree(ctx.urbs);
1484  free_buf:
1485         usb_free_coherent(udev, size, buf, buf_dma);
1486         return retval;
1487 }
1488 
1489 /*-------------------------------------------------------------------------*/
1490 
1491 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1492 {
1493         int     retval;
1494         u16     status;
1495 
1496         /* shouldn't look or act halted */
1497         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1498         if (retval < 0) {
1499                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1500                                 ep, retval);
1501                 return retval;
1502         }
1503         if (status != 0) {
1504                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1505                 return -EINVAL;
1506         }
1507         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1508         if (retval != 0)
1509                 return -EINVAL;
1510         return 0;
1511 }
1512 
1513 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1514 {
1515         int     retval;
1516         u16     status;
1517 
1518         /* should look and act halted */
1519         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1520         if (retval < 0) {
1521                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1522                                 ep, retval);
1523                 return retval;
1524         }
1525         if (status != 1) {
1526                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1527                 return -EINVAL;
1528         }
1529         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1530         if (retval != -EPIPE)
1531                 return -EINVAL;
1532         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1533         if (retval != -EPIPE)
1534                 return -EINVAL;
1535         return 0;
1536 }
1537 
1538 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1539 {
1540         int     retval;
1541 
1542         /* shouldn't look or act halted now */
1543         retval = verify_not_halted(tdev, ep, urb);
1544         if (retval < 0)
1545                 return retval;
1546 
1547         /* set halt (protocol test only), verify it worked */
1548         retval = usb_control_msg(urb->dev, usb_sndctrlpipe(urb->dev, 0),
1549                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1550                         USB_ENDPOINT_HALT, ep,
1551                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1552         if (retval < 0) {
1553                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1554                 return retval;
1555         }
1556         retval = verify_halted(tdev, ep, urb);
1557         if (retval < 0) {
1558                 int ret;
1559 
1560                 /* clear halt anyways, else further tests will fail */
1561                 ret = usb_clear_halt(urb->dev, urb->pipe);
1562                 if (ret)
1563                         ERROR(tdev, "ep %02x couldn't clear halt, %d\n",
1564                               ep, ret);
1565 
1566                 return retval;
1567         }
1568 
1569         /* clear halt (tests API + protocol), verify it worked */
1570         retval = usb_clear_halt(urb->dev, urb->pipe);
1571         if (retval < 0) {
1572                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1573                 return retval;
1574         }
1575         retval = verify_not_halted(tdev, ep, urb);
1576         if (retval < 0)
1577                 return retval;
1578 
1579         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1580 
1581         return 0;
1582 }
1583 
1584 static int halt_simple(struct usbtest_dev *dev)
1585 {
1586         int                     ep;
1587         int                     retval = 0;
1588         struct urb              *urb;
1589         struct usb_device       *udev = testdev_to_usbdev(dev);
1590 
1591         if (udev->speed == USB_SPEED_SUPER)
1592                 urb = simple_alloc_urb(udev, 0, 1024);
1593         else
1594                 urb = simple_alloc_urb(udev, 0, 512);
1595         if (urb == NULL)
1596                 return -ENOMEM;
1597 
1598         if (dev->in_pipe) {
1599                 ep = usb_pipeendpoint(dev->in_pipe) | USB_DIR_IN;
1600                 urb->pipe = dev->in_pipe;
1601                 retval = test_halt(dev, ep, urb);
1602                 if (retval < 0)
1603                         goto done;
1604         }
1605 
1606         if (dev->out_pipe) {
1607                 ep = usb_pipeendpoint(dev->out_pipe);
1608                 urb->pipe = dev->out_pipe;
1609                 retval = test_halt(dev, ep, urb);
1610         }
1611 done:
1612         simple_free_urb(urb);
1613         return retval;
1614 }
1615 
1616 /*-------------------------------------------------------------------------*/
1617 
1618 /* Control OUT tests use the vendor control requests from Intel's
1619  * USB 2.0 compliance test device:  write a buffer, read it back.
1620  *
1621  * Intel's spec only _requires_ that it work for one packet, which
1622  * is pretty weak.   Some HCDs place limits here; most devices will
1623  * need to be able to handle more than one OUT data packet.  We'll
1624  * try whatever we're told to try.
1625  */
1626 static int ctrl_out(struct usbtest_dev *dev,
1627                 unsigned count, unsigned length, unsigned vary, unsigned offset)
1628 {
1629         unsigned                i, j, len;
1630         int                     retval;
1631         u8                      *buf;
1632         char                    *what = "?";
1633         struct usb_device       *udev;
1634 
1635         if (length < 1 || length > 0xffff || vary >= length)
1636                 return -EINVAL;
1637 
1638         buf = kmalloc(length + offset, GFP_KERNEL);
1639         if (!buf)
1640                 return -ENOMEM;
1641 
1642         buf += offset;
1643         udev = testdev_to_usbdev(dev);
1644         len = length;
1645         retval = 0;
1646 
1647         /* NOTE:  hardware might well act differently if we pushed it
1648          * with lots back-to-back queued requests.
1649          */
1650         for (i = 0; i < count; i++) {
1651                 /* write patterned data */
1652                 for (j = 0; j < len; j++)
1653                         buf[j] = i + j;
1654                 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
1655                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1656                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1657                 if (retval != len) {
1658                         what = "write";
1659                         if (retval >= 0) {
1660                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1661                                                 retval, len);
1662                                 retval = -EBADMSG;
1663                         }
1664                         break;
1665                 }
1666 
1667                 /* read it back -- assuming nothing intervened!!  */
1668                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
1669                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1670                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1671                 if (retval != len) {
1672                         what = "read";
1673                         if (retval >= 0) {
1674                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1675                                                 retval, len);
1676                                 retval = -EBADMSG;
1677                         }
1678                         break;
1679                 }
1680 
1681                 /* fail if we can't verify */
1682                 for (j = 0; j < len; j++) {
1683                         if (buf[j] != (u8) (i + j)) {
1684                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1685                                         j, buf[j], (u8) i + j);
1686                                 retval = -EBADMSG;
1687                                 break;
1688                         }
1689                 }
1690                 if (retval < 0) {
1691                         what = "verify";
1692                         break;
1693                 }
1694 
1695                 len += vary;
1696 
1697                 /* [real world] the "zero bytes IN" case isn't really used.
1698                  * hardware can easily trip up in this weird case, since its
1699                  * status stage is IN, not OUT like other ep0in transfers.
1700                  */
1701                 if (len > length)
1702                         len = realworld ? 1 : 0;
1703         }
1704 
1705         if (retval < 0)
1706                 ERROR(dev, "ctrl_out %s failed, code %d, count %d\n",
1707                         what, retval, i);
1708 
1709         kfree(buf - offset);
1710         return retval;
1711 }
1712 
1713 /*-------------------------------------------------------------------------*/
1714 
1715 /* ISO tests ... mimics common usage
1716  *  - buffer length is split into N packets (mostly maxpacket sized)
1717  *  - multi-buffers according to sglen
1718  */
1719 
1720 struct iso_context {
1721         unsigned                count;
1722         unsigned                pending;
1723         spinlock_t              lock;
1724         struct completion       done;
1725         int                     submit_error;
1726         unsigned long           errors;
1727         unsigned long           packet_count;
1728         struct usbtest_dev      *dev;
1729 };
1730 
1731 static void iso_callback(struct urb *urb)
1732 {
1733         struct iso_context      *ctx = urb->context;
1734 
1735         spin_lock(&ctx->lock);
1736         ctx->count--;
1737 
1738         ctx->packet_count += urb->number_of_packets;
1739         if (urb->error_count > 0)
1740                 ctx->errors += urb->error_count;
1741         else if (urb->status != 0)
1742                 ctx->errors += urb->number_of_packets;
1743         else if (urb->actual_length != urb->transfer_buffer_length)
1744                 ctx->errors++;
1745         else if (check_guard_bytes(ctx->dev, urb) != 0)
1746                 ctx->errors++;
1747 
1748         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1749                         && !ctx->submit_error) {
1750                 int status = usb_submit_urb(urb, GFP_ATOMIC);
1751                 switch (status) {
1752                 case 0:
1753                         goto done;
1754                 default:
1755                         dev_err(&ctx->dev->intf->dev,
1756                                         "iso resubmit err %d\n",
1757                                         status);
1758                         /* FALLTHROUGH */
1759                 case -ENODEV:                   /* disconnected */
1760                 case -ESHUTDOWN:                /* endpoint disabled */
1761                         ctx->submit_error = 1;
1762                         break;
1763                 }
1764         }
1765 
1766         ctx->pending--;
1767         if (ctx->pending == 0) {
1768                 if (ctx->errors)
1769                         dev_err(&ctx->dev->intf->dev,
1770                                 "iso test, %lu errors out of %lu\n",
1771                                 ctx->errors, ctx->packet_count);
1772                 complete(&ctx->done);
1773         }
1774 done:
1775         spin_unlock(&ctx->lock);
1776 }
1777 
1778 static struct urb *iso_alloc_urb(
1779         struct usb_device       *udev,
1780         int                     pipe,
1781         struct usb_endpoint_descriptor  *desc,
1782         long                    bytes,
1783         unsigned offset
1784 )
1785 {
1786         struct urb              *urb;
1787         unsigned                i, maxp, packets;
1788 
1789         if (bytes < 0 || !desc)
1790                 return NULL;
1791         maxp = 0x7ff & usb_endpoint_maxp(desc);
1792         maxp *= 1 + (0x3 & (usb_endpoint_maxp(desc) >> 11));
1793         packets = DIV_ROUND_UP(bytes, maxp);
1794 
1795         urb = usb_alloc_urb(packets, GFP_KERNEL);
1796         if (!urb)
1797                 return urb;
1798         urb->dev = udev;
1799         urb->pipe = pipe;
1800 
1801         urb->number_of_packets = packets;
1802         urb->transfer_buffer_length = bytes;
1803         urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
1804                                                         GFP_KERNEL,
1805                                                         &urb->transfer_dma);
1806         if (!urb->transfer_buffer) {
1807                 usb_free_urb(urb);
1808                 return NULL;
1809         }
1810         if (offset) {
1811                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
1812                 urb->transfer_buffer += offset;
1813                 urb->transfer_dma += offset;
1814         }
1815         /* For inbound transfers use guard byte so that test fails if
1816                 data not correctly copied */
1817         memset(urb->transfer_buffer,
1818                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
1819                         bytes);
1820 
1821         for (i = 0; i < packets; i++) {
1822                 /* here, only the last packet will be short */
1823                 urb->iso_frame_desc[i].length = min((unsigned) bytes, maxp);
1824                 bytes -= urb->iso_frame_desc[i].length;
1825 
1826                 urb->iso_frame_desc[i].offset = maxp * i;
1827         }
1828 
1829         urb->complete = iso_callback;
1830         /* urb->context = SET BY CALLER */
1831         urb->interval = 1 << (desc->bInterval - 1);
1832         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1833         return urb;
1834 }
1835 
1836 static int
1837 test_iso_queue(struct usbtest_dev *dev, struct usbtest_param *param,
1838                 int pipe, struct usb_endpoint_descriptor *desc, unsigned offset)
1839 {
1840         struct iso_context      context;
1841         struct usb_device       *udev;
1842         unsigned                i;
1843         unsigned long           packets = 0;
1844         int                     status = 0;
1845         struct urb              *urbs[10];      /* FIXME no limit */
1846 
1847         if (param->sglen > 10)
1848                 return -EDOM;
1849 
1850         memset(&context, 0, sizeof(context));
1851         context.count = param->iterations * param->sglen;
1852         context.dev = dev;
1853         init_completion(&context.done);
1854         spin_lock_init(&context.lock);
1855 
1856         memset(urbs, 0, sizeof(urbs));
1857         udev = testdev_to_usbdev(dev);
1858         dev_info(&dev->intf->dev,
1859                 "... iso period %d %sframes, wMaxPacket %04x\n",
1860                 1 << (desc->bInterval - 1),
1861                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1862                 usb_endpoint_maxp(desc));
1863 
1864         for (i = 0; i < param->sglen; i++) {
1865                 urbs[i] = iso_alloc_urb(udev, pipe, desc,
1866                                         param->length, offset);
1867                 if (!urbs[i]) {
1868                         status = -ENOMEM;
1869                         goto fail;
1870                 }
1871                 packets += urbs[i]->number_of_packets;
1872                 urbs[i]->context = &context;
1873         }
1874         packets *= param->iterations;
1875         dev_info(&dev->intf->dev,
1876                 "... total %lu msec (%lu packets)\n",
1877                 (packets * (1 << (desc->bInterval - 1)))
1878                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1879                 packets);
1880 
1881         spin_lock_irq(&context.lock);
1882         for (i = 0; i < param->sglen; i++) {
1883                 ++context.pending;
1884                 status = usb_submit_urb(urbs[i], GFP_ATOMIC);
1885                 if (status < 0) {
1886                         ERROR(dev, "submit iso[%d], error %d\n", i, status);
1887                         if (i == 0) {
1888                                 spin_unlock_irq(&context.lock);
1889                                 goto fail;
1890                         }
1891 
1892                         simple_free_urb(urbs[i]);
1893                         urbs[i] = NULL;
1894                         context.pending--;
1895                         context.submit_error = 1;
1896                         break;
1897                 }
1898         }
1899         spin_unlock_irq(&context.lock);
1900 
1901         wait_for_completion(&context.done);
1902 
1903         for (i = 0; i < param->sglen; i++) {
1904                 if (urbs[i])
1905                         simple_free_urb(urbs[i]);
1906         }
1907         /*
1908          * Isochronous transfers are expected to fail sometimes.  As an
1909          * arbitrary limit, we will report an error if any submissions
1910          * fail or if the transfer failure rate is > 10%.
1911          */
1912         if (status != 0)
1913                 ;
1914         else if (context.submit_error)
1915                 status = -EACCES;
1916         else if (context.errors > context.packet_count / 10)
1917                 status = -EIO;
1918         return status;
1919 
1920 fail:
1921         for (i = 0; i < param->sglen; i++) {
1922                 if (urbs[i])
1923                         simple_free_urb(urbs[i]);
1924         }
1925         return status;
1926 }
1927 
1928 static int test_unaligned_bulk(
1929         struct usbtest_dev *tdev,
1930         int pipe,
1931         unsigned length,
1932         int iterations,
1933         unsigned transfer_flags,
1934         const char *label)
1935 {
1936         int retval;
1937         struct urb *urb = usbtest_alloc_urb(
1938                 testdev_to_usbdev(tdev), pipe, length, transfer_flags, 1);
1939 
1940         if (!urb)
1941                 return -ENOMEM;
1942 
1943         retval = simple_io(tdev, urb, iterations, 0, 0, label);
1944         simple_free_urb(urb);
1945         return retval;
1946 }
1947 
1948 /*-------------------------------------------------------------------------*/
1949 
1950 /* We only have this one interface to user space, through usbfs.
1951  * User mode code can scan usbfs to find N different devices (maybe on
1952  * different busses) to use when testing, and allocate one thread per
1953  * test.  So discovery is simplified, and we have no device naming issues.
1954  *
1955  * Don't use these only as stress/load tests.  Use them along with with
1956  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1957  * video capture, and so on.  Run different tests at different times, in
1958  * different sequences.  Nothing here should interact with other devices,
1959  * except indirectly by consuming USB bandwidth and CPU resources for test
1960  * threads and request completion.  But the only way to know that for sure
1961  * is to test when HC queues are in use by many devices.
1962  *
1963  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
1964  * it locks out usbcore in certain code paths.  Notably, if you disconnect
1965  * the device-under-test, khubd will wait block forever waiting for the
1966  * ioctl to complete ... so that usb_disconnect() can abort the pending
1967  * urbs and then call usbtest_disconnect().  To abort a test, you're best
1968  * off just killing the userspace task and waiting for it to exit.
1969  */
1970 
1971 static int
1972 usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
1973 {
1974         struct usbtest_dev      *dev = usb_get_intfdata(intf);
1975         struct usb_device       *udev = testdev_to_usbdev(dev);
1976         struct usbtest_param    *param = buf;
1977         int                     retval = -EOPNOTSUPP;
1978         struct urb              *urb;
1979         struct scatterlist      *sg;
1980         struct usb_sg_request   req;
1981         struct timeval          start;
1982         unsigned                i;
1983 
1984         /* FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is. */
1985 
1986         pattern = mod_pattern;
1987 
1988         if (code != USBTEST_REQUEST)
1989                 return -EOPNOTSUPP;
1990 
1991         if (param->iterations <= 0)
1992                 return -EINVAL;
1993 
1994         if (mutex_lock_interruptible(&dev->lock))
1995                 return -ERESTARTSYS;
1996 
1997         /* FIXME: What if a system sleep starts while a test is running? */
1998 
1999         /* some devices, like ez-usb default devices, need a non-default
2000          * altsetting to have any active endpoints.  some tests change
2001          * altsettings; force a default so most tests don't need to check.
2002          */
2003         if (dev->info->alt >= 0) {
2004                 int     res;
2005 
2006                 if (intf->altsetting->desc.bInterfaceNumber) {
2007                         mutex_unlock(&dev->lock);
2008                         return -ENODEV;
2009                 }
2010                 res = set_altsetting(dev, dev->info->alt);
2011                 if (res) {
2012                         dev_err(&intf->dev,
2013                                         "set altsetting to %d failed, %d\n",
2014                                         dev->info->alt, res);
2015                         mutex_unlock(&dev->lock);
2016                         return res;
2017                 }
2018         }
2019 
2020         /*
2021          * Just a bunch of test cases that every HCD is expected to handle.
2022          *
2023          * Some may need specific firmware, though it'd be good to have
2024          * one firmware image to handle all the test cases.
2025          *
2026          * FIXME add more tests!  cancel requests, verify the data, control
2027          * queueing, concurrent read+write threads, and so on.
2028          */
2029         do_gettimeofday(&start);
2030         switch (param->test_num) {
2031 
2032         case 0:
2033                 dev_info(&intf->dev, "TEST 0:  NOP\n");
2034                 retval = 0;
2035                 break;
2036 
2037         /* Simple non-queued bulk I/O tests */
2038         case 1:
2039                 if (dev->out_pipe == 0)
2040                         break;
2041                 dev_info(&intf->dev,
2042                                 "TEST 1:  write %d bytes %u times\n",
2043                                 param->length, param->iterations);
2044                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
2045                 if (!urb) {
2046                         retval = -ENOMEM;
2047                         break;
2048                 }
2049                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2050                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
2051                 simple_free_urb(urb);
2052                 break;
2053         case 2:
2054                 if (dev->in_pipe == 0)
2055                         break;
2056                 dev_info(&intf->dev,
2057                                 "TEST 2:  read %d bytes %u times\n",
2058                                 param->length, param->iterations);
2059                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
2060                 if (!urb) {
2061                         retval = -ENOMEM;
2062                         break;
2063                 }
2064                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2065                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
2066                 simple_free_urb(urb);
2067                 break;
2068         case 3:
2069                 if (dev->out_pipe == 0 || param->vary == 0)
2070                         break;
2071                 dev_info(&intf->dev,
2072                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
2073                                 param->vary, param->length, param->iterations);
2074                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
2075                 if (!urb) {
2076                         retval = -ENOMEM;
2077                         break;
2078                 }
2079                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2080                 retval = simple_io(dev, urb, param->iterations, param->vary,
2081                                         0, "test3");
2082                 simple_free_urb(urb);
2083                 break;
2084         case 4:
2085                 if (dev->in_pipe == 0 || param->vary == 0)
2086                         break;
2087                 dev_info(&intf->dev,
2088                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
2089                                 param->vary, param->length, param->iterations);
2090                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
2091                 if (!urb) {
2092                         retval = -ENOMEM;
2093                         break;
2094                 }
2095                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2096                 retval = simple_io(dev, urb, param->iterations, param->vary,
2097                                         0, "test4");
2098                 simple_free_urb(urb);
2099                 break;
2100 
2101         /* Queued bulk I/O tests */
2102         case 5:
2103                 if (dev->out_pipe == 0 || param->sglen == 0)
2104                         break;
2105                 dev_info(&intf->dev,
2106                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
2107                                 param->iterations,
2108                                 param->sglen, param->length);
2109                 sg = alloc_sglist(param->sglen, param->length, 0);
2110                 if (!sg) {
2111                         retval = -ENOMEM;
2112                         break;
2113                 }
2114                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2115                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
2116                                 &req, sg, param->sglen);
2117                 free_sglist(sg, param->sglen);
2118                 break;
2119 
2120         case 6:
2121                 if (dev->in_pipe == 0 || param->sglen == 0)
2122                         break;
2123                 dev_info(&intf->dev,
2124                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
2125                                 param->iterations,
2126                                 param->sglen, param->length);
2127                 sg = alloc_sglist(param->sglen, param->length, 0);
2128                 if (!sg) {
2129                         retval = -ENOMEM;
2130                         break;
2131                 }
2132                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2133                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
2134                                 &req, sg, param->sglen);
2135                 free_sglist(sg, param->sglen);
2136                 break;
2137         case 7:
2138                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
2139                         break;
2140                 dev_info(&intf->dev,
2141                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
2142                                 param->vary, param->iterations,
2143                                 param->sglen, param->length);
2144                 sg = alloc_sglist(param->sglen, param->length, param->vary);
2145                 if (!sg) {
2146                         retval = -ENOMEM;
2147                         break;
2148                 }
2149                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2150                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
2151                                 &req, sg, param->sglen);
2152                 free_sglist(sg, param->sglen);
2153                 break;
2154         case 8:
2155                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
2156                         break;
2157                 dev_info(&intf->dev,
2158                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
2159                                 param->vary, param->iterations,
2160                                 param->sglen, param->length);
2161                 sg = alloc_sglist(param->sglen, param->length, param->vary);
2162                 if (!sg) {
2163                         retval = -ENOMEM;
2164                         break;
2165                 }
2166                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2167                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
2168                                 &req, sg, param->sglen);
2169                 free_sglist(sg, param->sglen);
2170                 break;
2171 
2172         /* non-queued sanity tests for control (chapter 9 subset) */
2173         case 9:
2174                 retval = 0;
2175                 dev_info(&intf->dev,
2176                         "TEST 9:  ch9 (subset) control tests, %d times\n",
2177                                 param->iterations);
2178                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2179                         retval = ch9_postconfig(dev);
2180                 if (retval)
2181                         dev_err(&intf->dev, "ch9 subset failed, "
2182                                         "iterations left %d\n", i);
2183                 break;
2184 
2185         /* queued control messaging */
2186         case 10:
2187                 retval = 0;
2188                 dev_info(&intf->dev,
2189                                 "TEST 10:  queue %d control calls, %d times\n",
2190                                 param->sglen,
2191                                 param->iterations);
2192                 retval = test_ctrl_queue(dev, param);
2193                 break;
2194 
2195         /* simple non-queued unlinks (ring with one urb) */
2196         case 11:
2197                 if (dev->in_pipe == 0 || !param->length)
2198                         break;
2199                 retval = 0;
2200                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
2201                                 param->iterations, param->length);
2202                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2203                         retval = unlink_simple(dev, dev->in_pipe,
2204                                                 param->length);
2205                 if (retval)
2206                         dev_err(&intf->dev, "unlink reads failed %d, "
2207                                 "iterations left %d\n", retval, i);
2208                 break;
2209         case 12:
2210                 if (dev->out_pipe == 0 || !param->length)
2211                         break;
2212                 retval = 0;
2213                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
2214                                 param->iterations, param->length);
2215                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2216                         retval = unlink_simple(dev, dev->out_pipe,
2217                                                 param->length);
2218                 if (retval)
2219                         dev_err(&intf->dev, "unlink writes failed %d, "
2220                                 "iterations left %d\n", retval, i);
2221                 break;
2222 
2223         /* ep halt tests */
2224         case 13:
2225                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
2226                         break;
2227                 retval = 0;
2228                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
2229                                 param->iterations);
2230                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2231                         retval = halt_simple(dev);
2232 
2233                 if (retval)
2234                         ERROR(dev, "halts failed, iterations left %d\n", i);
2235                 break;
2236 
2237         /* control write tests */
2238         case 14:
2239                 if (!dev->info->ctrl_out)
2240                         break;
2241                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
2242                                 param->iterations,
2243                                 realworld ? 1 : 0, param->length,
2244                                 param->vary);
2245                 retval = ctrl_out(dev, param->iterations,
2246                                 param->length, param->vary, 0);
2247                 break;
2248 
2249         /* iso write tests */
2250         case 15:
2251                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2252                         break;
2253                 dev_info(&intf->dev,
2254                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
2255                                 param->iterations,
2256                                 param->sglen, param->length);
2257                 /* FIRMWARE:  iso sink */
2258                 retval = test_iso_queue(dev, param,
2259                                 dev->out_iso_pipe, dev->iso_out, 0);
2260                 break;
2261 
2262         /* iso read tests */
2263         case 16:
2264                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2265                         break;
2266                 dev_info(&intf->dev,
2267                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
2268                                 param->iterations,
2269                                 param->sglen, param->length);
2270                 /* FIRMWARE:  iso source */
2271                 retval = test_iso_queue(dev, param,
2272                                 dev->in_iso_pipe, dev->iso_in, 0);
2273                 break;
2274 
2275         /* FIXME scatterlist cancel (needs helper thread) */
2276 
2277         /* Tests for bulk I/O using DMA mapping by core and odd address */
2278         case 17:
2279                 if (dev->out_pipe == 0)
2280                         break;
2281                 dev_info(&intf->dev,
2282                         "TEST 17:  write odd addr %d bytes %u times core map\n",
2283                         param->length, param->iterations);
2284 
2285                 retval = test_unaligned_bulk(
2286                                 dev, dev->out_pipe,
2287                                 param->length, param->iterations,
2288                                 0, "test17");
2289                 break;
2290 
2291         case 18:
2292                 if (dev->in_pipe == 0)
2293                         break;
2294                 dev_info(&intf->dev,
2295                         "TEST 18:  read odd addr %d bytes %u times core map\n",
2296                         param->length, param->iterations);
2297 
2298                 retval = test_unaligned_bulk(
2299                                 dev, dev->in_pipe,
2300                                 param->length, param->iterations,
2301                                 0, "test18");
2302                 break;
2303 
2304         /* Tests for bulk I/O using premapped coherent buffer and odd address */
2305         case 19:
2306                 if (dev->out_pipe == 0)
2307                         break;
2308                 dev_info(&intf->dev,
2309                         "TEST 19:  write odd addr %d bytes %u times premapped\n",
2310                         param->length, param->iterations);
2311 
2312                 retval = test_unaligned_bulk(
2313                                 dev, dev->out_pipe,
2314                                 param->length, param->iterations,
2315                                 URB_NO_TRANSFER_DMA_MAP, "test19");
2316                 break;
2317 
2318         case 20:
2319                 if (dev->in_pipe == 0)
2320                         break;
2321                 dev_info(&intf->dev,
2322                         "TEST 20:  read odd addr %d bytes %u times premapped\n",
2323                         param->length, param->iterations);
2324 
2325                 retval = test_unaligned_bulk(
2326                                 dev, dev->in_pipe,
2327                                 param->length, param->iterations,
2328                                 URB_NO_TRANSFER_DMA_MAP, "test20");
2329                 break;
2330 
2331         /* control write tests with unaligned buffer */
2332         case 21:
2333                 if (!dev->info->ctrl_out)
2334                         break;
2335                 dev_info(&intf->dev,
2336                                 "TEST 21:  %d ep0out odd addr, %d..%d vary %d\n",
2337                                 param->iterations,
2338                                 realworld ? 1 : 0, param->length,
2339                                 param->vary);
2340                 retval = ctrl_out(dev, param->iterations,
2341                                 param->length, param->vary, 1);
2342                 break;
2343 
2344         /* unaligned iso tests */
2345         case 22:
2346                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2347                         break;
2348                 dev_info(&intf->dev,
2349                         "TEST 22:  write %d iso odd, %d entries of %d bytes\n",
2350                                 param->iterations,
2351                                 param->sglen, param->length);
2352                 retval = test_iso_queue(dev, param,
2353                                 dev->out_iso_pipe, dev->iso_out, 1);
2354                 break;
2355 
2356         case 23:
2357                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2358                         break;
2359                 dev_info(&intf->dev,
2360                         "TEST 23:  read %d iso odd, %d entries of %d bytes\n",
2361                                 param->iterations,
2362                                 param->sglen, param->length);
2363                 retval = test_iso_queue(dev, param,
2364                                 dev->in_iso_pipe, dev->iso_in, 1);
2365                 break;
2366 
2367         /* unlink URBs from a bulk-OUT queue */
2368         case 24:
2369                 if (dev->out_pipe == 0 || !param->length || param->sglen < 4)
2370                         break;
2371                 retval = 0;
2372                 dev_info(&intf->dev, "TEST 24:  unlink from %d queues of "
2373                                 "%d %d-byte writes\n",
2374                                 param->iterations, param->sglen, param->length);
2375                 for (i = param->iterations; retval == 0 && i > 0; --i) {
2376                         retval = unlink_queued(dev, dev->out_pipe,
2377                                                 param->sglen, param->length);
2378                         if (retval) {
2379                                 dev_err(&intf->dev,
2380                                         "unlink queued writes failed %d, "
2381                                         "iterations left %d\n", retval, i);
2382                                 break;
2383                         }
2384                 }
2385                 break;
2386 
2387         }
2388         do_gettimeofday(&param->duration);
2389         param->duration.tv_sec -= start.tv_sec;
2390         param->duration.tv_usec -= start.tv_usec;
2391         if (param->duration.tv_usec < 0) {
2392                 param->duration.tv_usec += 1000 * 1000;
2393                 param->duration.tv_sec -= 1;
2394         }
2395         mutex_unlock(&dev->lock);
2396         return retval;
2397 }
2398 
2399 /*-------------------------------------------------------------------------*/
2400 
2401 static unsigned force_interrupt;
2402 module_param(force_interrupt, uint, 0);
2403 MODULE_PARM_DESC(force_interrupt, "0 = test default; else interrupt");
2404 
2405 #ifdef  GENERIC
2406 static unsigned short vendor;
2407 module_param(vendor, ushort, 0);
2408 MODULE_PARM_DESC(vendor, "vendor code (from usb-if)");
2409 
2410 static unsigned short product;
2411 module_param(product, ushort, 0);
2412 MODULE_PARM_DESC(product, "product code (from vendor)");
2413 #endif
2414 
2415 static int
2416 usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
2417 {
2418         struct usb_device       *udev;
2419         struct usbtest_dev      *dev;
2420         struct usbtest_info     *info;
2421         char                    *rtest, *wtest;
2422         char                    *irtest, *iwtest;
2423 
2424         udev = interface_to_usbdev(intf);
2425 
2426 #ifdef  GENERIC
2427         /* specify devices by module parameters? */
2428         if (id->match_flags == 0) {
2429                 /* vendor match required, product match optional */
2430                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
2431                         return -ENODEV;
2432                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
2433                         return -ENODEV;
2434                 dev_info(&intf->dev, "matched module params, "
2435                                         "vend=0x%04x prod=0x%04x\n",
2436                                 le16_to_cpu(udev->descriptor.idVendor),
2437                                 le16_to_cpu(udev->descriptor.idProduct));
2438         }
2439 #endif
2440 
2441         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2442         if (!dev)
2443                 return -ENOMEM;
2444         info = (struct usbtest_info *) id->driver_info;
2445         dev->info = info;
2446         mutex_init(&dev->lock);
2447 
2448         dev->intf = intf;
2449 
2450         /* cacheline-aligned scratch for i/o */
2451         dev->buf = kmalloc(TBUF_SIZE, GFP_KERNEL);
2452         if (dev->buf == NULL) {
2453                 kfree(dev);
2454                 return -ENOMEM;
2455         }
2456 
2457         /* NOTE this doesn't yet test the handful of difference that are
2458          * visible with high speed interrupts:  bigger maxpacket (1K) and
2459          * "high bandwidth" modes (up to 3 packets/uframe).
2460          */
2461         rtest = wtest = "";
2462         irtest = iwtest = "";
2463         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
2464                 if (info->ep_in) {
2465                         dev->in_pipe = usb_rcvintpipe(udev, info->ep_in);
2466                         rtest = " intr-in";
2467                 }
2468                 if (info->ep_out) {
2469                         dev->out_pipe = usb_sndintpipe(udev, info->ep_out);
2470                         wtest = " intr-out";
2471                 }
2472         } else {
2473                 if (override_alt >= 0 || info->autoconf) {
2474                         int status;
2475 
2476                         status = get_endpoints(dev, intf);
2477                         if (status < 0) {
2478                                 WARNING(dev, "couldn't get endpoints, %d\n",
2479                                                 status);
2480                                 kfree(dev->buf);
2481                                 kfree(dev);
2482                                 return status;
2483                         }
2484                         /* may find bulk or ISO pipes */
2485                 } else {
2486                         if (info->ep_in)
2487                                 dev->in_pipe = usb_rcvbulkpipe(udev,
2488                                                         info->ep_in);
2489                         if (info->ep_out)
2490                                 dev->out_pipe = usb_sndbulkpipe(udev,
2491                                                         info->ep_out);
2492                 }
2493                 if (dev->in_pipe)
2494                         rtest = " bulk-in";
2495                 if (dev->out_pipe)
2496                         wtest = " bulk-out";
2497                 if (dev->in_iso_pipe)
2498                         irtest = " iso-in";
2499                 if (dev->out_iso_pipe)
2500                         iwtest = " iso-out";
2501         }
2502 
2503         usb_set_intfdata(intf, dev);
2504         dev_info(&intf->dev, "%s\n", info->name);
2505         dev_info(&intf->dev, "%s {control%s%s%s%s%s} tests%s\n",
2506                         usb_speed_string(udev->speed),
2507                         info->ctrl_out ? " in/out" : "",
2508                         rtest, wtest,
2509                         irtest, iwtest,
2510                         info->alt >= 0 ? " (+alt)" : "");
2511         return 0;
2512 }
2513 
2514 static int usbtest_suspend(struct usb_interface *intf, pm_message_t message)
2515 {
2516         return 0;
2517 }
2518 
2519 static int usbtest_resume(struct usb_interface *intf)
2520 {
2521         return 0;
2522 }
2523 
2524 
2525 static void usbtest_disconnect(struct usb_interface *intf)
2526 {
2527         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2528 
2529         usb_set_intfdata(intf, NULL);
2530         dev_dbg(&intf->dev, "disconnect\n");
2531         kfree(dev);
2532 }
2533 
2534 /* Basic testing only needs a device that can source or sink bulk traffic.
2535  * Any device can test control transfers (default with GENERIC binding).
2536  *
2537  * Several entries work with the default EP0 implementation that's built
2538  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2539  * by (very) small config EEPROMS, but otherwise all these devices act
2540  * identically until firmware is loaded:  only EP0 works.  It turns out
2541  * to be easy to make other endpoints work, without modifying that EP0
2542  * behavior.  For now, we expect that kind of firmware.
2543  */
2544 
2545 /* an21xx or fx versions of ez-usb */
2546 static struct usbtest_info ez1_info = {
2547         .name           = "EZ-USB device",
2548         .ep_in          = 2,
2549         .ep_out         = 2,
2550         .alt            = 1,
2551 };
2552 
2553 /* fx2 version of ez-usb */
2554 static struct usbtest_info ez2_info = {
2555         .name           = "FX2 device",
2556         .ep_in          = 6,
2557         .ep_out         = 2,
2558         .alt            = 1,
2559 };
2560 
2561 /* ezusb family device with dedicated usb test firmware,
2562  */
2563 static struct usbtest_info fw_info = {
2564         .name           = "usb test device",
2565         .ep_in          = 2,
2566         .ep_out         = 2,
2567         .alt            = 1,
2568         .autoconf       = 1,            /* iso and ctrl_out need autoconf */
2569         .ctrl_out       = 1,
2570         .iso            = 1,            /* iso_ep's are #8 in/out */
2571 };
2572 
2573 /* peripheral running Linux and 'zero.c' test firmware, or
2574  * its user-mode cousin. different versions of this use
2575  * different hardware with the same vendor/product codes.
2576  * host side MUST rely on the endpoint descriptors.
2577  */
2578 static struct usbtest_info gz_info = {
2579         .name           = "Linux gadget zero",
2580         .autoconf       = 1,
2581         .ctrl_out       = 1,
2582         .iso            = 1,
2583         .alt            = 0,
2584 };
2585 
2586 static struct usbtest_info um_info = {
2587         .name           = "Linux user mode test driver",
2588         .autoconf       = 1,
2589         .alt            = -1,
2590 };
2591 
2592 static struct usbtest_info um2_info = {
2593         .name           = "Linux user mode ISO test driver",
2594         .autoconf       = 1,
2595         .iso            = 1,
2596         .alt            = -1,
2597 };
2598 
2599 #ifdef IBOT2
2600 /* this is a nice source of high speed bulk data;
2601  * uses an FX2, with firmware provided in the device
2602  */
2603 static struct usbtest_info ibot2_info = {
2604         .name           = "iBOT2 webcam",
2605         .ep_in          = 2,
2606         .alt            = -1,
2607 };
2608 #endif
2609 
2610 #ifdef GENERIC
2611 /* we can use any device to test control traffic */
2612 static struct usbtest_info generic_info = {
2613         .name           = "Generic USB device",
2614         .alt            = -1,
2615 };
2616 #endif
2617 
2618 
2619 static const struct usb_device_id id_table[] = {
2620 
2621         /*-------------------------------------------------------------*/
2622 
2623         /* EZ-USB devices which download firmware to replace (or in our
2624          * case augment) the default device implementation.
2625          */
2626 
2627         /* generic EZ-USB FX controller */
2628         { USB_DEVICE(0x0547, 0x2235),
2629                 .driver_info = (unsigned long) &ez1_info,
2630         },
2631 
2632         /* CY3671 development board with EZ-USB FX */
2633         { USB_DEVICE(0x0547, 0x0080),
2634                 .driver_info = (unsigned long) &ez1_info,
2635         },
2636 
2637         /* generic EZ-USB FX2 controller (or development board) */
2638         { USB_DEVICE(0x04b4, 0x8613),
2639                 .driver_info = (unsigned long) &ez2_info,
2640         },
2641 
2642         /* re-enumerated usb test device firmware */
2643         { USB_DEVICE(0xfff0, 0xfff0),
2644                 .driver_info = (unsigned long) &fw_info,
2645         },
2646 
2647         /* "Gadget Zero" firmware runs under Linux */
2648         { USB_DEVICE(0x0525, 0xa4a0),
2649                 .driver_info = (unsigned long) &gz_info,
2650         },
2651 
2652         /* so does a user-mode variant */
2653         { USB_DEVICE(0x0525, 0xa4a4),
2654                 .driver_info = (unsigned long) &um_info,
2655         },
2656 
2657         /* ... and a user-mode variant that talks iso */
2658         { USB_DEVICE(0x0525, 0xa4a3),
2659                 .driver_info = (unsigned long) &um2_info,
2660         },
2661 
2662 #ifdef KEYSPAN_19Qi
2663         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2664         /* this does not coexist with the real Keyspan 19qi driver! */
2665         { USB_DEVICE(0x06cd, 0x010b),
2666                 .driver_info = (unsigned long) &ez1_info,
2667         },
2668 #endif
2669 
2670         /*-------------------------------------------------------------*/
2671 
2672 #ifdef IBOT2
2673         /* iBOT2 makes a nice source of high speed bulk-in data */
2674         /* this does not coexist with a real iBOT2 driver! */
2675         { USB_DEVICE(0x0b62, 0x0059),
2676                 .driver_info = (unsigned long) &ibot2_info,
2677         },
2678 #endif
2679 
2680         /*-------------------------------------------------------------*/
2681 
2682 #ifdef GENERIC
2683         /* module params can specify devices to use for control tests */
2684         { .driver_info = (unsigned long) &generic_info, },
2685 #endif
2686 
2687         /*-------------------------------------------------------------*/
2688 
2689         { }
2690 };
2691 MODULE_DEVICE_TABLE(usb, id_table);
2692 
2693 static struct usb_driver usbtest_driver = {
2694         .name =         "usbtest",
2695         .id_table =     id_table,
2696         .probe =        usbtest_probe,
2697         .unlocked_ioctl = usbtest_ioctl,
2698         .disconnect =   usbtest_disconnect,
2699         .suspend =      usbtest_suspend,
2700         .resume =       usbtest_resume,
2701 };
2702 
2703 /*-------------------------------------------------------------------------*/
2704 
2705 static int __init usbtest_init(void)
2706 {
2707 #ifdef GENERIC
2708         if (vendor)
2709                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2710 #endif
2711         return usb_register(&usbtest_driver);
2712 }
2713 module_init(usbtest_init);
2714 
2715 static void __exit usbtest_exit(void)
2716 {
2717         usb_deregister(&usbtest_driver);
2718 }
2719 module_exit(usbtest_exit);
2720 
2721 MODULE_DESCRIPTION("USB Core/HCD Testing Driver");
2722 MODULE_LICENSE("GPL");
2723 
2724 

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