git.oblomov.eu Git - linux-2.6/blob - 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
  14 /*-------------------------------------------------------------------------*/
  15
  16 // FIXME make these public somewhere; usbdevfs.h?
  17 //
  18 struct usbtest_param {
  19         // inputs
  20         unsigned                test_num;       /* 0..(TEST_CASES-1) */
  21         unsigned                iterations;
  22         unsigned                length;
  23         unsigned                vary;
  24         unsigned                sglen;
  25
  26         // outputs
  27         struct timeval          duration;
  28 };
  29 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
  30
  31 /*-------------------------------------------------------------------------*/
  32
  33 #define GENERIC         /* let probe() bind using module params */
  34
  35 /* Some devices that can be used for testing will have "real" drivers.
  36  * Entries for those need to be enabled here by hand, after disabling
  37  * that "real" driver.
  38  */
  39 //#define       IBOT2           /* grab iBOT2 webcams */
  40 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
  41
  42 /*-------------------------------------------------------------------------*/
  43
  44 struct usbtest_info {
  45         const char              *name;
  46         u8                      ep_in;          /* bulk/intr source */
  47         u8                      ep_out;         /* bulk/intr sink */
  48         unsigned                autoconf : 1;
  49         unsigned                ctrl_out : 1;
  50         unsigned                iso : 1;        /* try iso in/out */
  51         int                     alt;
  52 };
  53
  54 /* this is accessed only through usbfs ioctl calls.
  55  * one ioctl to issue a test ... one lock per device.
  56  * tests create other threads if they need them.
  57  * urbs and buffers are allocated dynamically,
  58  * and data generated deterministically.
  59  */
  60 struct usbtest_dev {
  61         struct usb_interface    *intf;
  62         struct usbtest_info     *info;
  63         int                     in_pipe;
  64         int                     out_pipe;
  65         int                     in_iso_pipe;
  66         int                     out_iso_pipe;
  67         struct usb_endpoint_descriptor  *iso_in, *iso_out;
  68         struct mutex            lock;
  69
  70 #define TBUF_SIZE       256
  71         u8                      *buf;
  72 };
  73
  74 static struct usb_device *testdev_to_usbdev (struct usbtest_dev *test)
  75 {
  76         return interface_to_usbdev (test->intf);
  77 }
  78
  79 /* set up all urbs so they can be used with either bulk or interrupt */
  80 #define INTERRUPT_RATE          1       /* msec/transfer */
  81
  82 #define ERROR(tdev, fmt, args...) \
  83         dev_err(&(tdev)->intf->dev , fmt , ## args)
  84 #define WARNING(tdev, fmt, args...) \
  85         dev_warn(&(tdev)->intf->dev , fmt , ## args)
  86
  87 /*-------------------------------------------------------------------------*/
  88
  89 static int
  90 get_endpoints (struct usbtest_dev *dev, struct usb_interface *intf)
  91 {
  92         int                             tmp;
  93         struct usb_host_interface       *alt;
  94         struct usb_host_endpoint        *in, *out;
  95         struct usb_host_endpoint        *iso_in, *iso_out;
  96         struct usb_device               *udev;
  97
  98         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
  99                 unsigned        ep;
 100
 101                 in = out = NULL;
 102                 iso_in = iso_out = NULL;
 103                 alt = intf->altsetting + tmp;
 104
 105                 /* take the first altsetting with in-bulk + out-bulk;
 106                  * ignore other endpoints and altsetttings.
 107                  */
 108                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
 109                         struct usb_host_endpoint        *e;
 110
 111                         e = alt->endpoint + ep;
 112                         switch (e->desc.bmAttributes) {
 113                         case USB_ENDPOINT_XFER_BULK:
 114                                 break;
 115                         case USB_ENDPOINT_XFER_ISOC:
 116                                 if (dev->info->iso)
 117                                         goto try_iso;
 118                                 // FALLTHROUGH
 119                         default:
 120                                 continue;
 121                         }
 122                         if (usb_endpoint_dir_in(&e->desc)) {
 123                                 if (!in)
 124                                         in = e;
 125                         } else {
 126                                 if (!out)
 127                                         out = e;
 128                         }
 129                         continue;
 130 try_iso:
 131                         if (usb_endpoint_dir_in(&e->desc)) {
 132                                 if (!iso_in)
 133                                         iso_in = e;
 134                         } else {
 135                                 if (!iso_out)
 136                                         iso_out = e;
 137                         }
 138                 }
 139                 if ((in && out)  ||  (iso_in && iso_out))
 140                         goto found;
 141         }
 142         return -EINVAL;
 143
 144 found:
 145         udev = testdev_to_usbdev (dev);
 146         if (alt->desc.bAlternateSetting != 0) {
 147                 tmp = usb_set_interface (udev,
 148                                 alt->desc.bInterfaceNumber,
 149                                 alt->desc.bAlternateSetting);
 150                 if (tmp < 0)
 151                         return tmp;
 152         }
 153
 154         if (in) {
 155                 dev->in_pipe = usb_rcvbulkpipe (udev,
 156                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 157                 dev->out_pipe = usb_sndbulkpipe (udev,
 158                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 159         }
 160         if (iso_in) {
 161                 dev->iso_in = &iso_in->desc;
 162                 dev->in_iso_pipe = usb_rcvisocpipe (udev,
 163                                 iso_in->desc.bEndpointAddress
 164                                         & USB_ENDPOINT_NUMBER_MASK);
 165                 dev->iso_out = &iso_out->desc;
 166                 dev->out_iso_pipe = usb_sndisocpipe (udev,
 167                                 iso_out->desc.bEndpointAddress
 168                                         & USB_ENDPOINT_NUMBER_MASK);
 169         }
 170         return 0;
 171 }
 172
 173 /*-------------------------------------------------------------------------*/
 174
 175 /* Support for testing basic non-queued I/O streams.
 176  *
 177  * These just package urbs as requests that can be easily canceled.
 178  * Each urb's data buffer is dynamically allocated; callers can fill
 179  * them with non-zero test data (or test for it) when appropriate.
 180  */
 181
 182 static void simple_callback (struct urb *urb)
 183 {
 184         complete(urb->context);
 185 }
 186
 187 static struct urb *simple_alloc_urb (
 188         struct usb_device       *udev,
 189         int                     pipe,
 190         unsigned long           bytes
 191 )
 192 {
 193         struct urb              *urb;
 194
 195         urb = usb_alloc_urb (0, GFP_KERNEL);
 196         if (!urb)
 197                 return urb;
 198         usb_fill_bulk_urb (urb, udev, pipe, NULL, bytes, simple_callback, NULL);
 199         urb->interval = (udev->speed == USB_SPEED_HIGH)
 200                         ? (INTERRUPT_RATE << 3)
 201                         : INTERRUPT_RATE;
 202         urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 203         if (usb_pipein (pipe))
 204                 urb->transfer_flags |= URB_SHORT_NOT_OK;
 205         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, GFP_KERNEL,
 206                         &urb->transfer_dma);
 207         if (!urb->transfer_buffer) {
 208                 usb_free_urb (urb);
 209                 urb = NULL;
 210         } else
 211                 memset (urb->transfer_buffer, 0, bytes);
 212         return urb;
 213 }
 214
 215 static unsigned pattern = 0;
 216 module_param (pattern, uint, S_IRUGO);
 217 MODULE_PARM_DESC(pattern, "i/o pattern (0 == zeroes)");
 218
 219 static inline void simple_fill_buf (struct urb *urb)
 220 {
 221         unsigned        i;
 222         u8              *buf = urb->transfer_buffer;
 223         unsigned        len = urb->transfer_buffer_length;
 224
 225         switch (pattern) {
 226         default:
 227                 // FALLTHROUGH
 228         case 0:
 229                 memset (buf, 0, len);
 230                 break;
 231         case 1:                 /* mod63 */
 232                 for (i = 0; i < len; i++)
 233                         *buf++ = (u8) (i % 63);
 234                 break;
 235         }
 236 }
 237
 238 static inline int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb)
 239 {
 240         unsigned        i;
 241         u8              expected;
 242         u8              *buf = urb->transfer_buffer;
 243         unsigned        len = urb->actual_length;
 244
 245         for (i = 0; i < len; i++, buf++) {
 246                 switch (pattern) {
 247                 /* all-zeroes has no synchronization issues */
 248                 case 0:
 249                         expected = 0;
 250                         break;
 251                 /* mod63 stays in sync with short-terminated transfers,
 252                  * or otherwise when host and gadget agree on how large
 253                  * each usb transfer request should be.  resync is done
 254                  * with set_interface or set_config.
 255                  */
 256                 case 1:                 /* mod63 */
 257                         expected = i % 63;
 258                         break;
 259                 /* always fail unsupported patterns */
 260                 default:
 261                         expected = !*buf;
 262                         break;
 263                 }
 264                 if (*buf == expected)
 265                         continue;
 266                 ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
 267                 return -EINVAL;
 268         }
 269         return 0;
 270 }
 271
 272 static void simple_free_urb (struct urb *urb)
 273 {
 274         usb_buffer_free (urb->dev, urb->transfer_buffer_length,
 275                         urb->transfer_buffer, urb->transfer_dma);
 276         usb_free_urb (urb);
 277 }
 278
 279 static int simple_io (
 280         struct usbtest_dev      *tdev,
 281         struct urb              *urb,
 282         int                     iterations,
 283         int                     vary,
 284         int                     expected,
 285         const char              *label
 286 )
 287 {
 288         struct usb_device       *udev = urb->dev;
 289         int                     max = urb->transfer_buffer_length;
 290         struct completion       completion;
 291         int                     retval = 0;
 292
 293         urb->context = &completion;
 294         while (retval == 0 && iterations-- > 0) {
 295                 init_completion (&completion);
 296                 if (usb_pipeout (urb->pipe))
 297                         simple_fill_buf (urb);
 298                 if ((retval = usb_submit_urb (urb, GFP_KERNEL)) != 0)
 299                         break;
 300
 301                 /* NOTE:  no timeouts; can't be broken out of by interrupt */
 302                 wait_for_completion (&completion);
 303                 retval = urb->status;
 304                 urb->dev = udev;
 305                 if (retval == 0 && usb_pipein (urb->pipe))
 306                         retval = simple_check_buf(tdev, urb);
 307
 308                 if (vary) {
 309                         int     len = urb->transfer_buffer_length;
 310
 311                         len += vary;
 312                         len %= max;
 313                         if (len == 0)
 314                                 len = (vary < max) ? vary : max;
 315                         urb->transfer_buffer_length = len;
 316                 }
 317
 318                 /* FIXME if endpoint halted, clear halt (and log) */
 319         }
 320         urb->transfer_buffer_length = max;
 321
 322         if (expected != retval)
 323                 dev_err(&udev->dev,
 324                         "%s failed, iterations left %d, status %d (not %d)\n",
 325                                 label, iterations, retval, expected);
 326         return retval;
 327 }
 328
 329
 330 /*-------------------------------------------------------------------------*/
 331
 332 /* We use scatterlist primitives to test queued I/O.
 333  * Yes, this also tests the scatterlist primitives.
 334  */
 335
 336 static void free_sglist (struct scatterlist *sg, int nents)
 337 {
 338         unsigned                i;
 339
 340         if (!sg)
 341                 return;
 342         for (i = 0; i < nents; i++) {
 343                 if (!sg_page(&sg[i]))
 344                         continue;
 345                 kfree (sg_virt(&sg[i]));
 346         }
 347         kfree (sg);
 348 }
 349
 350 static struct scatterlist *
 351 alloc_sglist (int nents, int max, int vary)
 352 {
 353         struct scatterlist      *sg;
 354         unsigned                i;
 355         unsigned                size = max;
 356
 357         sg = kmalloc (nents * sizeof *sg, GFP_KERNEL);
 358         if (!sg)
 359                 return NULL;
 360         sg_init_table(sg, nents);
 361
 362         for (i = 0; i < nents; i++) {
 363                 char            *buf;
 364                 unsigned        j;
 365
 366                 buf = kzalloc (size, GFP_KERNEL);
 367                 if (!buf) {
 368                         free_sglist (sg, i);
 369                         return NULL;
 370                 }
 371
 372                 /* kmalloc pages are always physically contiguous! */
 373                 sg_set_buf(&sg[i], buf, size);
 374
 375                 switch (pattern) {
 376                 case 0:
 377                         /* already zeroed */
 378                         break;
 379                 case 1:
 380                         for (j = 0; j < size; j++)
 381                                 *buf++ = (u8) (j % 63);
 382                         break;
 383                 }
 384
 385                 if (vary) {
 386                         size += vary;
 387                         size %= max;
 388                         if (size == 0)
 389                                 size = (vary < max) ? vary : max;
 390                 }
 391         }
 392
 393         return sg;
 394 }
 395
 396 static int perform_sglist (
 397         struct usbtest_dev      *tdev,
 398         unsigned                iterations,
 399         int                     pipe,
 400         struct usb_sg_request   *req,
 401         struct scatterlist      *sg,
 402         int                     nents
 403 )
 404 {
 405         struct usb_device       *udev = testdev_to_usbdev(tdev);
 406         int                     retval = 0;
 407
 408         while (retval == 0 && iterations-- > 0) {
 409                 retval = usb_sg_init (req, udev, pipe,
 410                                 (udev->speed == USB_SPEED_HIGH)
 411                                         ? (INTERRUPT_RATE << 3)
 412                                         : INTERRUPT_RATE,
 413                                 sg, nents, 0, GFP_KERNEL);
 414
 415                 if (retval)
 416                         break;
 417                 usb_sg_wait (req);
 418                 retval = req->status;
 419
 420                 /* FIXME check resulting data pattern */
 421
 422                 /* FIXME if endpoint halted, clear halt (and log) */
 423         }
 424
 425         // FIXME for unlink or fault handling tests, don't report
 426         // failure if retval is as we expected ...
 427
 428         if (retval)
 429                 ERROR(tdev, "perform_sglist failed, "
 430                                 "iterations left %d, status %d\n",
 431                                 iterations, retval);
 432         return retval;
 433 }
 434
 435
 436 /*-------------------------------------------------------------------------*/
 437
 438 /* unqueued control message testing
 439  *
 440  * there's a nice set of device functional requirements in chapter 9 of the
 441  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
 442  * special test firmware.
 443  *
 444  * we know the device is configured (or suspended) by the time it's visible
 445  * through usbfs.  we can't change that, so we won't test enumeration (which
 446  * worked 'well enough' to get here, this time), power management (ditto),
 447  * or remote wakeup (which needs human interaction).
 448  */
 449
 450 static unsigned realworld = 1;
 451 module_param (realworld, uint, 0);
 452 MODULE_PARM_DESC (realworld, "clear to demand stricter spec compliance");
 453
 454 static int get_altsetting (struct usbtest_dev *dev)
 455 {
 456         struct usb_interface    *iface = dev->intf;
 457         struct usb_device       *udev = interface_to_usbdev (iface);
 458         int                     retval;
 459
 460         retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 461                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
 462                         0, iface->altsetting [0].desc.bInterfaceNumber,
 463                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 464         switch (retval) {
 465         case 1:
 466                 return dev->buf [0];
 467         case 0:
 468                 retval = -ERANGE;
 469                 // FALLTHROUGH
 470         default:
 471                 return retval;
 472         }
 473 }
 474
 475 static int set_altsetting (struct usbtest_dev *dev, int alternate)
 476 {
 477         struct usb_interface            *iface = dev->intf;
 478         struct usb_device               *udev;
 479
 480         if (alternate < 0 || alternate >= 256)
 481                 return -EINVAL;
 482
 483         udev = interface_to_usbdev (iface);
 484         return usb_set_interface (udev,
 485                         iface->altsetting [0].desc.bInterfaceNumber,
 486                         alternate);
 487 }
 488
 489 static int is_good_config(struct usbtest_dev *tdev, int len)
 490 {
 491         struct usb_config_descriptor    *config;
 492
 493         if (len < sizeof *config)
 494                 return 0;
 495         config = (struct usb_config_descriptor *) tdev->buf;
 496
 497         switch (config->bDescriptorType) {
 498         case USB_DT_CONFIG:
 499         case USB_DT_OTHER_SPEED_CONFIG:
 500                 if (config->bLength != 9) {
 501                         ERROR(tdev, "bogus config descriptor length\n");
 502                         return 0;
 503                 }
 504                 /* this bit 'must be 1' but often isn't */
 505                 if (!realworld && !(config->bmAttributes & 0x80)) {
 506                         ERROR(tdev, "high bit of config attributes not set\n");
 507                         return 0;
 508                 }
 509                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
 510                         ERROR(tdev, "reserved config bits set\n");
 511                         return 0;
 512                 }
 513                 break;
 514         default:
 515                 return 0;
 516         }
 517
 518         if (le16_to_cpu(config->wTotalLength) == len)           /* read it all */
 519                 return 1;
 520         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)             /* max partial read */
 521                 return 1;
 522         ERROR(tdev, "bogus config descriptor read size\n");
 523         return 0;
 524 }
 525
 526 /* sanity test for standard requests working with usb_control_mesg() and some
 527  * of the utility functions which use it.
 528  *
 529  * this doesn't test how endpoint halts behave or data toggles get set, since
 530  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
 531  * halt or toggle).  toggle testing is impractical without support from hcds.
 532  *
 533  * this avoids failing devices linux would normally work with, by not testing
 534  * config/altsetting operations for devices that only support their defaults.
 535  * such devices rarely support those needless operations.
 536  *
 537  * NOTE that since this is a sanity test, it's not examining boundary cases
 538  * to see if usbcore, hcd, and device all behave right.  such testing would
 539  * involve varied read sizes and other operation sequences.
 540  */
 541 static int ch9_postconfig (struct usbtest_dev *dev)
 542 {
 543         struct usb_interface    *iface = dev->intf;
 544         struct usb_device       *udev = interface_to_usbdev (iface);
 545         int                     i, alt, retval;
 546
 547         /* [9.2.3] if there's more than one altsetting, we need to be able to
 548          * set and get each one.  mostly trusts the descriptors from usbcore.
 549          */
 550         for (i = 0; i < iface->num_altsetting; i++) {
 551
 552                 /* 9.2.3 constrains the range here */
 553                 alt = iface->altsetting [i].desc.bAlternateSetting;
 554                 if (alt < 0 || alt >= iface->num_altsetting) {
 555                         dev_err(&iface->dev,
 556                                         "invalid alt [%d].bAltSetting = %d\n",
 557                                         i, alt);
 558                 }
 559
 560                 /* [real world] get/set unimplemented if there's only one */
 561                 if (realworld && iface->num_altsetting == 1)
 562                         continue;
 563
 564                 /* [9.4.10] set_interface */
 565                 retval = set_altsetting (dev, alt);
 566                 if (retval) {
 567                         dev_err(&iface->dev, "can't set_interface = %d, %d\n",
 568                                         alt, retval);
 569                         return retval;
 570                 }
 571
 572                 /* [9.4.4] get_interface always works */
 573                 retval = get_altsetting (dev);
 574                 if (retval != alt) {
 575                         dev_err(&iface->dev, "get alt should be %d, was %d\n",
 576                                         alt, retval);
 577                         return (retval < 0) ? retval : -EDOM;
 578                 }
 579
 580         }
 581
 582         /* [real world] get_config unimplemented if there's only one */
 583         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
 584                 int     expected = udev->actconfig->desc.bConfigurationValue;
 585
 586                 /* [9.4.2] get_configuration always works
 587                  * ... although some cheap devices (like one TI Hub I've got)
 588                  * won't return config descriptors except before set_config.
 589                  */
 590                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 591                                 USB_REQ_GET_CONFIGURATION,
 592                                 USB_DIR_IN | USB_RECIP_DEVICE,
 593                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 594                 if (retval != 1 || dev->buf [0] != expected) {
 595                         dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
 596                                 retval, dev->buf[0], expected);
 597                         return (retval < 0) ? retval : -EDOM;
 598                 }
 599         }
 600
 601         /* there's always [9.4.3] a device descriptor [9.6.1] */
 602         retval = usb_get_descriptor (udev, USB_DT_DEVICE, 0,
 603                         dev->buf, sizeof udev->descriptor);
 604         if (retval != sizeof udev->descriptor) {
 605                 dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
 606                 return (retval < 0) ? retval : -EDOM;
 607         }
 608
 609         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
 610         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
 611                 retval = usb_get_descriptor (udev, USB_DT_CONFIG, i,
 612                                 dev->buf, TBUF_SIZE);
 613                 if (!is_good_config(dev, retval)) {
 614                         dev_err(&iface->dev,
 615                                         "config [%d] descriptor --> %d\n",
 616                                         i, retval);
 617                         return (retval < 0) ? retval : -EDOM;
 618                 }
 619
 620                 // FIXME cross-checking udev->config[i] to make sure usbcore
 621                 // parsed it right (etc) would be good testing paranoia
 622         }
 623
 624         /* and sometimes [9.2.6.6] speed dependent descriptors */
 625         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
 626                 struct usb_qualifier_descriptor         *d = NULL;
 627
 628                 /* device qualifier [9.6.2] */
 629                 retval = usb_get_descriptor (udev,
 630                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
 631                                 sizeof (struct usb_qualifier_descriptor));
 632                 if (retval == -EPIPE) {
 633                         if (udev->speed == USB_SPEED_HIGH) {
 634                                 dev_err(&iface->dev,
 635                                                 "hs dev qualifier --> %d\n",
 636                                                 retval);
 637                                 return (retval < 0) ? retval : -EDOM;
 638                         }
 639                         /* usb2.0 but not high-speed capable; fine */
 640                 } else if (retval != sizeof (struct usb_qualifier_descriptor)) {
 641                         dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
 642                         return (retval < 0) ? retval : -EDOM;
 643                 } else
 644                         d = (struct usb_qualifier_descriptor *) dev->buf;
 645
 646                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
 647                 if (d) {
 648                         unsigned max = d->bNumConfigurations;
 649                         for (i = 0; i < max; i++) {
 650                                 retval = usb_get_descriptor (udev,
 651                                         USB_DT_OTHER_SPEED_CONFIG, i,
 652                                         dev->buf, TBUF_SIZE);
 653                                 if (!is_good_config(dev, retval)) {
 654                                         dev_err(&iface->dev,
 655                                                 "other speed config --> %d\n",
 656                                                 retval);
 657                                         return (retval < 0) ? retval : -EDOM;
 658                                 }
 659                         }
 660                 }
 661         }
 662         // FIXME fetch strings from at least the device descriptor
 663
 664         /* [9.4.5] get_status always works */
 665         retval = usb_get_status (udev, USB_RECIP_DEVICE, 0, dev->buf);
 666         if (retval != 2) {
 667                 dev_err(&iface->dev, "get dev status --> %d\n", retval);
 668                 return (retval < 0) ? retval : -EDOM;
 669         }
 670
 671         // FIXME configuration.bmAttributes says if we could try to set/clear
 672         // the device's remote wakeup feature ... if we can, test that here
 673
 674         retval = usb_get_status (udev, USB_RECIP_INTERFACE,
 675                         iface->altsetting [0].desc.bInterfaceNumber, dev->buf);
 676         if (retval != 2) {
 677                 dev_err(&iface->dev, "get interface status --> %d\n", retval);
 678                 return (retval < 0) ? retval : -EDOM;
 679         }
 680         // FIXME get status for each endpoint in the interface
 681
 682         return 0;
 683 }
 684
 685 /*-------------------------------------------------------------------------*/
 686
 687 /* use ch9 requests to test whether:
 688  *   (a) queues work for control, keeping N subtests queued and
 689  *       active (auto-resubmit) for M loops through the queue.
 690  *   (b) protocol stalls (control-only) will autorecover.
 691  *       it's not like bulk/intr; no halt clearing.
 692  *   (c) short control reads are reported and handled.
 693  *   (d) queues are always processed in-order
 694  */
 695
 696 struct ctrl_ctx {
 697         spinlock_t              lock;
 698         struct usbtest_dev      *dev;
 699         struct completion       complete;
 700         unsigned                count;
 701         unsigned                pending;
 702         int                     status;
 703         struct urb              **urb;
 704         struct usbtest_param    *param;
 705         int                     last;
 706 };
 707
 708 #define NUM_SUBCASES    15              /* how many test subcases here? */
 709
 710 struct subcase {
 711         struct usb_ctrlrequest  setup;
 712         int                     number;
 713         int                     expected;
 714 };
 715
 716 static void ctrl_complete (struct urb *urb)
 717 {
 718         struct ctrl_ctx         *ctx = urb->context;
 719         struct usb_ctrlrequest  *reqp;
 720         struct subcase          *subcase;
 721         int                     status = urb->status;
 722
 723         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
 724         subcase = container_of (reqp, struct subcase, setup);
 725
 726         spin_lock (&ctx->lock);
 727         ctx->count--;
 728         ctx->pending--;
 729
 730         /* queue must transfer and complete in fifo order, unless
 731          * usb_unlink_urb() is used to unlink something not at the
 732          * physical queue head (not tested).
 733          */
 734         if (subcase->number > 0) {
 735                 if ((subcase->number - ctx->last) != 1) {
 736                         ERROR(ctx->dev,
 737                                 "subcase %d completed out of order, last %d\n",
 738                                 subcase->number, ctx->last);
 739                         status = -EDOM;
 740                         ctx->last = subcase->number;
 741                         goto error;
 742                 }
 743         }
 744         ctx->last = subcase->number;
 745
 746         /* succeed or fault in only one way? */
 747         if (status == subcase->expected)
 748                 status = 0;
 749
 750         /* async unlink for cleanup? */
 751         else if (status != -ECONNRESET) {
 752
 753                 /* some faults are allowed, not required */
 754                 if (subcase->expected > 0 && (
 755                           ((status == -subcase->expected        /* happened */
 756                            || status == 0))))                   /* didn't */
 757                         status = 0;
 758                 /* sometimes more than one fault is allowed */
 759                 else if (subcase->number == 12 && status == -EPIPE)
 760                         status = 0;
 761                 else
 762                         ERROR(ctx->dev, "subtest %d error, status %d\n",
 763                                         subcase->number, status);
 764         }
 765
 766         /* unexpected status codes mean errors; ideally, in hardware */
 767         if (status) {
 768 error:
 769                 if (ctx->status == 0) {
 770                         int             i;
 771
 772                         ctx->status = status;
 773                         ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
 774                                         "%d left, subcase %d, len %d/%d\n",
 775                                         reqp->bRequestType, reqp->bRequest,
 776                                         status, ctx->count, subcase->number,
 777                                         urb->actual_length,
 778                                         urb->transfer_buffer_length);
 779
 780                         /* FIXME this "unlink everything" exit route should
 781                          * be a separate test case.
 782                          */
 783
 784                         /* unlink whatever's still pending */
 785                         for (i = 1; i < ctx->param->sglen; i++) {
 786                                 struct urb      *u = ctx->urb [
 787                                                 (i + subcase->number)
 788                                                 % ctx->param->sglen];
 789
 790                                 if (u == urb || !u->dev)
 791                                         continue;
 792                                 spin_unlock(&ctx->lock);
 793                                 status = usb_unlink_urb (u);
 794                                 spin_lock(&ctx->lock);
 795                                 switch (status) {
 796                                 case -EINPROGRESS:
 797                                 case -EBUSY:
 798                                 case -EIDRM:
 799                                         continue;
 800                                 default:
 801                                         ERROR(ctx->dev, "urb unlink --> %d\n",
 802                                                         status);
 803                                 }
 804                         }
 805                         status = ctx->status;
 806                 }
 807         }
 808
 809         /* resubmit if we need to, else mark this as done */
 810         if ((status == 0) && (ctx->pending < ctx->count)) {
 811                 if ((status = usb_submit_urb (urb, GFP_ATOMIC)) != 0) {
 812                         ERROR(ctx->dev,
 813                                 "can't resubmit ctrl %02x.%02x, err %d\n",
 814                                 reqp->bRequestType, reqp->bRequest, status);
 815                         urb->dev = NULL;
 816                 } else
 817                         ctx->pending++;
 818         } else
 819                 urb->dev = NULL;
 820
 821         /* signal completion when nothing's queued */
 822         if (ctx->pending == 0)
 823                 complete (&ctx->complete);
 824         spin_unlock (&ctx->lock);
 825 }
 826
 827 static int
 828 test_ctrl_queue (struct usbtest_dev *dev, struct usbtest_param *param)
 829 {
 830         struct usb_device       *udev = testdev_to_usbdev (dev);
 831         struct urb              **urb;
 832         struct ctrl_ctx         context;
 833         int                     i;
 834
 835         spin_lock_init (&context.lock);
 836         context.dev = dev;
 837         init_completion (&context.complete);
 838         context.count = param->sglen * param->iterations;
 839         context.pending = 0;
 840         context.status = -ENOMEM;
 841         context.param = param;
 842         context.last = -1;
 843
 844         /* allocate and init the urbs we'll queue.
 845          * as with bulk/intr sglists, sglen is the queue depth; it also
 846          * controls which subtests run (more tests than sglen) or rerun.
 847          */
 848         urb = kcalloc(param->sglen, sizeof(struct urb *), GFP_KERNEL);
 849         if (!urb)
 850                 return -ENOMEM;
 851         for (i = 0; i < param->sglen; i++) {
 852                 int                     pipe = usb_rcvctrlpipe (udev, 0);
 853                 unsigned                len;
 854                 struct urb              *u;
 855                 struct usb_ctrlrequest  req;
 856                 struct subcase          *reqp;
 857
 858                 /* sign of this variable means:
 859                  *  -: tested code must return this (negative) error code
 860                  *  +: tested code may return this (negative too) error code
 861                  */
 862                 int                     expected = 0;
 863
 864                 /* requests here are mostly expected to succeed on any
 865                  * device, but some are chosen to trigger protocol stalls
 866                  * or short reads.
 867                  */
 868                 memset (&req, 0, sizeof req);
 869                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
 870                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 871
 872                 switch (i % NUM_SUBCASES) {
 873                 case 0:         // get device descriptor
 874                         req.wValue = cpu_to_le16 (USB_DT_DEVICE << 8);
 875                         len = sizeof (struct usb_device_descriptor);
 876                         break;
 877                 case 1:         // get first config descriptor (only)
 878                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 879                         len = sizeof (struct usb_config_descriptor);
 880                         break;
 881                 case 2:         // get altsetting (OFTEN STALLS)
 882                         req.bRequest = USB_REQ_GET_INTERFACE;
 883                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 884                         // index = 0 means first interface
 885                         len = 1;
 886                         expected = EPIPE;
 887                         break;
 888                 case 3:         // get interface status
 889                         req.bRequest = USB_REQ_GET_STATUS;
 890                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 891                         // interface 0
 892                         len = 2;
 893                         break;
 894                 case 4:         // get device status
 895                         req.bRequest = USB_REQ_GET_STATUS;
 896                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 897                         len = 2;
 898                         break;
 899                 case 5:         // get device qualifier (MAY STALL)
 900                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
 901                         len = sizeof (struct usb_qualifier_descriptor);
 902                         if (udev->speed != USB_SPEED_HIGH)
 903                                 expected = EPIPE;
 904                         break;
 905                 case 6:         // get first config descriptor, plus interface
 906                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 907                         len = sizeof (struct usb_config_descriptor);
 908                         len += sizeof (struct usb_interface_descriptor);
 909                         break;
 910                 case 7:         // get interface descriptor (ALWAYS STALLS)
 911                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
 912                         // interface == 0
 913                         len = sizeof (struct usb_interface_descriptor);
 914                         expected = -EPIPE;
 915                         break;
 916                 // NOTE: two consecutive stalls in the queue here.
 917                 // that tests fault recovery a bit more aggressively.
 918                 case 8:         // clear endpoint halt (MAY STALL)
 919                         req.bRequest = USB_REQ_CLEAR_FEATURE;
 920                         req.bRequestType = USB_RECIP_ENDPOINT;
 921                         // wValue 0 == ep halt
 922                         // wIndex 0 == ep0 (shouldn't halt!)
 923                         len = 0;
 924                         pipe = usb_sndctrlpipe (udev, 0);
 925                         expected = EPIPE;
 926                         break;
 927                 case 9:         // get endpoint status
 928                         req.bRequest = USB_REQ_GET_STATUS;
 929                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
 930                         // endpoint 0
 931                         len = 2;
 932                         break;
 933                 case 10:        // trigger short read (EREMOTEIO)
 934                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 935                         len = 1024;
 936                         expected = -EREMOTEIO;
 937                         break;
 938                 // NOTE: two consecutive _different_ faults in the queue.
 939                 case 11:        // get endpoint descriptor (ALWAYS STALLS)
 940                         req.wValue = cpu_to_le16 (USB_DT_ENDPOINT << 8);
 941                         // endpoint == 0
 942                         len = sizeof (struct usb_interface_descriptor);
 943                         expected = EPIPE;
 944                         break;
 945                 // NOTE: sometimes even a third fault in the queue!
 946                 case 12:        // get string 0 descriptor (MAY STALL)
 947                         req.wValue = cpu_to_le16 (USB_DT_STRING << 8);
 948                         // string == 0, for language IDs
 949                         len = sizeof (struct usb_interface_descriptor);
 950                         // may succeed when > 4 languages
 951                         expected = EREMOTEIO;   // or EPIPE, if no strings
 952                         break;
 953                 case 13:        // short read, resembling case 10
 954                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 955                         // last data packet "should" be DATA1, not DATA0
 956                         len = 1024 - udev->descriptor.bMaxPacketSize0;
 957                         expected = -EREMOTEIO;
 958                         break;
 959                 case 14:        // short read; try to fill the last packet
 960                         req.wValue = cpu_to_le16 ((USB_DT_DEVICE << 8) | 0);
 961                         /* device descriptor size == 18 bytes */
 962                         len = udev->descriptor.bMaxPacketSize0;
 963                         switch (len) {
 964                         case 8:         len = 24; break;
 965                         case 16:        len = 32; break;
 966                         }
 967                         expected = -EREMOTEIO;
 968                         break;
 969                 default:
 970                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
 971                         context.status = -EINVAL;
 972                         goto cleanup;
 973                 }
 974                 req.wLength = cpu_to_le16 (len);
 975                 urb [i] = u = simple_alloc_urb (udev, pipe, len);
 976                 if (!u)
 977                         goto cleanup;
 978
 979                 reqp = usb_buffer_alloc (udev, sizeof *reqp, GFP_KERNEL,
 980                                 &u->setup_dma);
 981                 if (!reqp)
 982                         goto cleanup;
 983                 reqp->setup = req;
 984                 reqp->number = i % NUM_SUBCASES;
 985                 reqp->expected = expected;
 986                 u->setup_packet = (char *) &reqp->setup;
 987                 u->transfer_flags |= URB_NO_SETUP_DMA_MAP;
 988
 989                 u->context = &context;
 990                 u->complete = ctrl_complete;
 991         }
 992
 993         /* queue the urbs */
 994         context.urb = urb;
 995         spin_lock_irq (&context.lock);
 996         for (i = 0; i < param->sglen; i++) {
 997                 context.status = usb_submit_urb (urb [i], GFP_ATOMIC);
 998                 if (context.status != 0) {
 999                         ERROR(dev, "can't submit urb[%d], status %d\n",
1000                                         i, context.status);
1001                         context.count = context.pending;
1002                         break;
1003                 }
1004                 context.pending++;
1005         }
1006         spin_unlock_irq (&context.lock);
1007
1008         /* FIXME  set timer and time out; provide a disconnect hook */
1009
1010         /* wait for the last one to complete */
1011         if (context.pending > 0)
1012                 wait_for_completion (&context.complete);
1013
1014 cleanup:
1015         for (i = 0; i < param->sglen; i++) {
1016                 if (!urb [i])
1017                         continue;
1018                 urb [i]->dev = udev;
1019                 if (urb [i]->setup_packet)
1020                         usb_buffer_free (udev, sizeof (struct usb_ctrlrequest),
1021                                         urb [i]->setup_packet,
1022                                         urb [i]->setup_dma);
1023                 simple_free_urb (urb [i]);
1024         }
1025         kfree (urb);
1026         return context.status;
1027 }
1028 #undef NUM_SUBCASES
1029
1030
1031 /*-------------------------------------------------------------------------*/
1032
1033 static void unlink1_callback (struct urb *urb)
1034 {
1035         int     status = urb->status;
1036
1037         // we "know" -EPIPE (stall) never happens
1038         if (!status)
1039                 status = usb_submit_urb (urb, GFP_ATOMIC);
1040         if (status) {
1041                 urb->status = status;
1042                 complete(urb->context);
1043         }
1044 }
1045
1046 static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
1047 {
1048         struct urb              *urb;
1049         struct completion       completion;
1050         int                     retval = 0;
1051
1052         init_completion (&completion);
1053         urb = simple_alloc_urb (testdev_to_usbdev (dev), pipe, size);
1054         if (!urb)
1055                 return -ENOMEM;
1056         urb->context = &completion;
1057         urb->complete = unlink1_callback;
1058
1059         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1060          * states, and testing should get to all of them over time.
1061          *
1062          * FIXME want additional tests for when endpoint is STALLing
1063          * due to errors, or is just NAKing requests.
1064          */
1065         if ((retval = usb_submit_urb (urb, GFP_KERNEL)) != 0) {
1066                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1067                 return retval;
1068         }
1069
1070         /* unlinking that should always work.  variable delay tests more
1071          * hcd states and code paths, even with little other system load.
1072          */
1073         msleep (jiffies % (2 * INTERRUPT_RATE));
1074         if (async) {
1075 retry:
1076                 retval = usb_unlink_urb (urb);
1077                 if (retval == -EBUSY || retval == -EIDRM) {
1078                         /* we can't unlink urbs while they're completing.
1079                          * or if they've completed, and we haven't resubmitted.
1080                          * "normal" drivers would prevent resubmission, but
1081                          * since we're testing unlink paths, we can't.
1082                          */
1083                         ERROR(dev,  "unlink retry\n");
1084                         goto retry;
1085                 }
1086         } else
1087                 usb_kill_urb (urb);
1088         if (!(retval == 0 || retval == -EINPROGRESS)) {
1089                 dev_err(&dev->intf->dev, "unlink fail %d\n", retval);
1090                 return retval;
1091         }
1092
1093         wait_for_completion (&completion);
1094         retval = urb->status;
1095         simple_free_urb (urb);
1096
1097         if (async)
1098                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1099         else
1100                 return (retval == -ENOENT || retval == -EPERM) ?
1101                                 0 : retval - 2000;
1102 }
1103
1104 static int unlink_simple (struct usbtest_dev *dev, int pipe, int len)
1105 {
1106         int                     retval = 0;
1107
1108         /* test sync and async paths */
1109         retval = unlink1 (dev, pipe, len, 1);
1110         if (!retval)
1111                 retval = unlink1 (dev, pipe, len, 0);
1112         return retval;
1113 }
1114
1115 /*-------------------------------------------------------------------------*/
1116
1117 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1118 {
1119         int     retval;
1120         u16     status;
1121
1122         /* shouldn't look or act halted */
1123         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1124         if (retval < 0) {
1125                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1126                                 ep, retval);
1127                 return retval;
1128         }
1129         if (status != 0) {
1130                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1131                 return -EINVAL;
1132         }
1133         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1134         if (retval != 0)
1135                 return -EINVAL;
1136         return 0;
1137 }
1138
1139 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1140 {
1141         int     retval;
1142         u16     status;
1143
1144         /* should look and act halted */
1145         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1146         if (retval < 0) {
1147                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1148                                 ep, retval);
1149                 return retval;
1150         }
1151         le16_to_cpus(&status);
1152         if (status != 1) {
1153                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1154                 return -EINVAL;
1155         }
1156         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1157         if (retval != -EPIPE)
1158                 return -EINVAL;
1159         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1160         if (retval != -EPIPE)
1161                 return -EINVAL;
1162         return 0;
1163 }
1164
1165 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1166 {
1167         int     retval;
1168
1169         /* shouldn't look or act halted now */
1170         retval = verify_not_halted(tdev, ep, urb);
1171         if (retval < 0)
1172                 return retval;
1173
1174         /* set halt (protocol test only), verify it worked */
1175         retval = usb_control_msg (urb->dev, usb_sndctrlpipe (urb->dev, 0),
1176                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1177                         USB_ENDPOINT_HALT, ep,
1178                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1179         if (retval < 0) {
1180                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1181                 return retval;
1182         }
1183         retval = verify_halted(tdev, ep, urb);
1184         if (retval < 0)
1185                 return retval;
1186
1187         /* clear halt (tests API + protocol), verify it worked */
1188         retval = usb_clear_halt (urb->dev, urb->pipe);
1189         if (retval < 0) {
1190                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1191                 return retval;
1192         }
1193         retval = verify_not_halted(tdev, ep, urb);
1194         if (retval < 0)
1195                 return retval;
1196
1197         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1198
1199         return 0;
1200 }
1201
1202 static int halt_simple (struct usbtest_dev *dev)
1203 {
1204         int             ep;
1205         int             retval = 0;
1206         struct urb      *urb;
1207
1208         urb = simple_alloc_urb (testdev_to_usbdev (dev), 0, 512);
1209         if (urb == NULL)
1210                 return -ENOMEM;
1211
1212         if (dev->in_pipe) {
1213                 ep = usb_pipeendpoint (dev->in_pipe) | USB_DIR_IN;
1214                 urb->pipe = dev->in_pipe;
1215                 retval = test_halt(dev, ep, urb);
1216                 if (retval < 0)
1217                         goto done;
1218         }
1219
1220         if (dev->out_pipe) {
1221                 ep = usb_pipeendpoint (dev->out_pipe);
1222                 urb->pipe = dev->out_pipe;
1223                 retval = test_halt(dev, ep, urb);
1224         }
1225 done:
1226         simple_free_urb (urb);
1227         return retval;
1228 }
1229
1230 /*-------------------------------------------------------------------------*/
1231
1232 /* Control OUT tests use the vendor control requests from Intel's
1233  * USB 2.0 compliance test device:  write a buffer, read it back.
1234  *
1235  * Intel's spec only _requires_ that it work for one packet, which
1236  * is pretty weak.   Some HCDs place limits here; most devices will
1237  * need to be able to handle more than one OUT data packet.  We'll
1238  * try whatever we're told to try.
1239  */
1240 static int ctrl_out (struct usbtest_dev *dev,
1241                 unsigned count, unsigned length, unsigned vary)
1242 {
1243         unsigned                i, j, len;
1244         int                     retval;
1245         u8                      *buf;
1246         char                    *what = "?";
1247         struct usb_device       *udev;
1248
1249         if (length < 1 || length > 0xffff || vary >= length)
1250                 return -EINVAL;
1251
1252         buf = kmalloc(length, GFP_KERNEL);
1253         if (!buf)
1254                 return -ENOMEM;
1255
1256         udev = testdev_to_usbdev (dev);
1257         len = length;
1258         retval = 0;
1259
1260         /* NOTE:  hardware might well act differently if we pushed it
1261          * with lots back-to-back queued requests.
1262          */
1263         for (i = 0; i < count; i++) {
1264                 /* write patterned data */
1265                 for (j = 0; j < len; j++)
1266                         buf [j] = i + j;
1267                 retval = usb_control_msg (udev, usb_sndctrlpipe (udev,0),
1268                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1269                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1270                 if (retval != len) {
1271                         what = "write";
1272                         if (retval >= 0) {
1273                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1274                                                 retval, len);
1275                                 retval = -EBADMSG;
1276                         }
1277                         break;
1278                 }
1279
1280                 /* read it back -- assuming nothing intervened!!  */
1281                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev,0),
1282                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1283                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1284                 if (retval != len) {
1285                         what = "read";
1286                         if (retval >= 0) {
1287                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1288                                                 retval, len);
1289                                 retval = -EBADMSG;
1290                         }
1291                         break;
1292                 }
1293
1294                 /* fail if we can't verify */
1295                 for (j = 0; j < len; j++) {
1296                         if (buf [j] != (u8) (i + j)) {
1297                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1298                                         j, buf [j], (u8) i + j);
1299                                 retval = -EBADMSG;
1300                                 break;
1301                         }
1302                 }
1303                 if (retval < 0) {
1304                         what = "verify";
1305                         break;
1306                 }
1307
1308                 len += vary;
1309
1310                 /* [real world] the "zero bytes IN" case isn't really used.
1311                  * hardware can easily trip up in this weird case, since its
1312                  * status stage is IN, not OUT like other ep0in transfers.
1313                  */
1314                 if (len > length)
1315                         len = realworld ? 1 : 0;
1316         }
1317
1318         if (retval < 0)
1319                 ERROR (dev, "ctrl_out %s failed, code %d, count %d\n",
1320                         what, retval, i);
1321
1322         kfree (buf);
1323         return retval;
1324 }
1325
1326 /*-------------------------------------------------------------------------*/
1327
1328 /* ISO tests ... mimics common usage
1329  *  - buffer length is split into N packets (mostly maxpacket sized)
1330  *  - multi-buffers according to sglen
1331  */
1332
1333 struct iso_context {
1334         unsigned                count;
1335         unsigned                pending;
1336         spinlock_t              lock;
1337         struct completion       done;
1338         int                     submit_error;
1339         unsigned long           errors;
1340         unsigned long           packet_count;
1341         struct usbtest_dev      *dev;
1342 };
1343
1344 static void iso_callback (struct urb *urb)
1345 {
1346         struct iso_context      *ctx = urb->context;
1347
1348         spin_lock(&ctx->lock);
1349         ctx->count--;
1350
1351         ctx->packet_count += urb->number_of_packets;
1352         if (urb->error_count > 0)
1353                 ctx->errors += urb->error_count;
1354         else if (urb->status != 0)
1355                 ctx->errors += urb->number_of_packets;
1356
1357         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1358                         && !ctx->submit_error) {
1359                 int status = usb_submit_urb (urb, GFP_ATOMIC);
1360                 switch (status) {
1361                 case 0:
1362                         goto done;
1363                 default:
1364                         dev_err(&ctx->dev->intf->dev,
1365                                         "iso resubmit err %d\n",
1366                                         status);
1367                         /* FALLTHROUGH */
1368                 case -ENODEV:                   /* disconnected */
1369                 case -ESHUTDOWN:                /* endpoint disabled */
1370                         ctx->submit_error = 1;
1371                         break;
1372                 }
1373         }
1374         simple_free_urb (urb);
1375
1376         ctx->pending--;
1377         if (ctx->pending == 0) {
1378                 if (ctx->errors)
1379                         dev_err(&ctx->dev->intf->dev,
1380                                 "iso test, %lu errors out of %lu\n",
1381                                 ctx->errors, ctx->packet_count);
1382                 complete (&ctx->done);
1383         }
1384 done:
1385         spin_unlock(&ctx->lock);
1386 }
1387
1388 static struct urb *iso_alloc_urb (
1389         struct usb_device       *udev,
1390         int                     pipe,
1391         struct usb_endpoint_descriptor  *desc,
1392         long                    bytes
1393 )
1394 {
1395         struct urb              *urb;
1396         unsigned                i, maxp, packets;
1397
1398         if (bytes < 0 || !desc)
1399                 return NULL;
1400         maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
1401         maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
1402         packets = DIV_ROUND_UP(bytes, maxp);
1403
1404         urb = usb_alloc_urb (packets, GFP_KERNEL);
1405         if (!urb)
1406                 return urb;
1407         urb->dev = udev;
1408         urb->pipe = pipe;
1409
1410         urb->number_of_packets = packets;
1411         urb->transfer_buffer_length = bytes;
1412         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, GFP_KERNEL,
1413                         &urb->transfer_dma);
1414         if (!urb->transfer_buffer) {
1415                 usb_free_urb (urb);
1416                 return NULL;
1417         }
1418         memset (urb->transfer_buffer, 0, bytes);
1419         for (i = 0; i < packets; i++) {
1420                 /* here, only the last packet will be short */
1421                 urb->iso_frame_desc[i].length = min ((unsigned) bytes, maxp);
1422                 bytes -= urb->iso_frame_desc[i].length;
1423
1424                 urb->iso_frame_desc[i].offset = maxp * i;
1425         }
1426
1427         urb->complete = iso_callback;
1428         // urb->context = SET BY CALLER
1429         urb->interval = 1 << (desc->bInterval - 1);
1430         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1431         return urb;
1432 }
1433
1434 static int
1435 test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
1436                 int pipe, struct usb_endpoint_descriptor *desc)
1437 {
1438         struct iso_context      context;
1439         struct usb_device       *udev;
1440         unsigned                i;
1441         unsigned long           packets = 0;
1442         int                     status = 0;
1443         struct urb              *urbs[10];      /* FIXME no limit */
1444
1445         if (param->sglen > 10)
1446                 return -EDOM;
1447
1448         memset(&context, 0, sizeof context);
1449         context.count = param->iterations * param->sglen;
1450         context.dev = dev;
1451         init_completion (&context.done);
1452         spin_lock_init (&context.lock);
1453
1454         memset (urbs, 0, sizeof urbs);
1455         udev = testdev_to_usbdev (dev);
1456         dev_info(&dev->intf->dev,
1457                 "... iso period %d %sframes, wMaxPacket %04x\n",
1458                 1 << (desc->bInterval - 1),
1459                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1460                 le16_to_cpu(desc->wMaxPacketSize));
1461
1462         for (i = 0; i < param->sglen; i++) {
1463                 urbs [i] = iso_alloc_urb (udev, pipe, desc,
1464                                 param->length);
1465                 if (!urbs [i]) {
1466                         status = -ENOMEM;
1467                         goto fail;
1468                 }
1469                 packets += urbs[i]->number_of_packets;
1470                 urbs [i]->context = &context;
1471         }
1472         packets *= param->iterations;
1473         dev_info(&dev->intf->dev,
1474                 "... total %lu msec (%lu packets)\n",
1475                 (packets * (1 << (desc->bInterval - 1)))
1476                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1477                 packets);
1478
1479         spin_lock_irq (&context.lock);
1480         for (i = 0; i < param->sglen; i++) {
1481                 ++context.pending;
1482                 status = usb_submit_urb (urbs [i], GFP_ATOMIC);
1483                 if (status < 0) {
1484                         ERROR (dev, "submit iso[%d], error %d\n", i, status);
1485                         if (i == 0) {
1486                                 spin_unlock_irq (&context.lock);
1487                                 goto fail;
1488                         }
1489
1490                         simple_free_urb (urbs [i]);
1491                         context.pending--;
1492                         context.submit_error = 1;
1493                         break;
1494                 }
1495         }
1496         spin_unlock_irq (&context.lock);
1497
1498         wait_for_completion (&context.done);
1499
1500         /*
1501          * Isochronous transfers are expected to fail sometimes.  As an
1502          * arbitrary limit, we will report an error if any submissions
1503          * fail or if the transfer failure rate is > 10%.
1504          */
1505         if (status != 0)
1506                 ;
1507         else if (context.submit_error)
1508                 status = -EACCES;
1509         else if (context.errors > context.packet_count / 10)
1510                 status = -EIO;
1511         return status;
1512
1513 fail:
1514         for (i = 0; i < param->sglen; i++) {
1515                 if (urbs [i])
1516                         simple_free_urb (urbs [i]);
1517         }
1518         return status;
1519 }
1520
1521 /*-------------------------------------------------------------------------*/
1522
1523 /* We only have this one interface to user space, through usbfs.
1524  * User mode code can scan usbfs to find N different devices (maybe on
1525  * different busses) to use when testing, and allocate one thread per
1526  * test.  So discovery is simplified, and we have no device naming issues.
1527  *
1528  * Don't use these only as stress/load tests.  Use them along with with
1529  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1530  * video capture, and so on.  Run different tests at different times, in
1531  * different sequences.  Nothing here should interact with other devices,
1532  * except indirectly by consuming USB bandwidth and CPU resources for test
1533  * threads and request completion.  But the only way to know that for sure
1534  * is to test when HC queues are in use by many devices.
1535  *
1536  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
1537  * it locks out usbcore in certain code paths.  Notably, if you disconnect
1538  * the device-under-test, khubd will wait block forever waiting for the
1539  * ioctl to complete ... so that usb_disconnect() can abort the pending
1540  * urbs and then call usbtest_disconnect().  To abort a test, you're best
1541  * off just killing the userspace task and waiting for it to exit.
1542  */
1543
1544 static int
1545 usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
1546 {
1547         struct usbtest_dev      *dev = usb_get_intfdata (intf);
1548         struct usb_device       *udev = testdev_to_usbdev (dev);
1549         struct usbtest_param    *param = buf;
1550         int                     retval = -EOPNOTSUPP;
1551         struct urb              *urb;
1552         struct scatterlist      *sg;
1553         struct usb_sg_request   req;
1554         struct timeval          start;
1555         unsigned                i;
1556
1557         // FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is.
1558
1559         if (code != USBTEST_REQUEST)
1560                 return -EOPNOTSUPP;
1561
1562         if (param->iterations <= 0)
1563                 return -EINVAL;
1564
1565         if (mutex_lock_interruptible(&dev->lock))
1566                 return -ERESTARTSYS;
1567
1568         /* FIXME: What if a system sleep starts while a test is running? */
1569         if (!intf->is_active) {
1570                 mutex_unlock(&dev->lock);
1571                 return -EHOSTUNREACH;
1572         }
1573
1574         /* some devices, like ez-usb default devices, need a non-default
1575          * altsetting to have any active endpoints.  some tests change
1576          * altsettings; force a default so most tests don't need to check.
1577          */
1578         if (dev->info->alt >= 0) {
1579                 int     res;
1580
1581                 if (intf->altsetting->desc.bInterfaceNumber) {
1582                         mutex_unlock(&dev->lock);
1583                         return -ENODEV;
1584                 }
1585                 res = set_altsetting (dev, dev->info->alt);
1586                 if (res) {
1587                         dev_err (&intf->dev,
1588                                         "set altsetting to %d failed, %d\n",
1589                                         dev->info->alt, res);
1590                         mutex_unlock(&dev->lock);
1591                         return res;
1592                 }
1593         }
1594
1595         /*
1596          * Just a bunch of test cases that every HCD is expected to handle.
1597          *
1598          * Some may need specific firmware, though it'd be good to have
1599          * one firmware image to handle all the test cases.
1600          *
1601          * FIXME add more tests!  cancel requests, verify the data, control
1602          * queueing, concurrent read+write threads, and so on.
1603          */
1604         do_gettimeofday (&start);
1605         switch (param->test_num) {
1606
1607         case 0:
1608                 dev_info(&intf->dev, "TEST 0:  NOP\n");
1609                 retval = 0;
1610                 break;
1611
1612         /* Simple non-queued bulk I/O tests */
1613         case 1:
1614                 if (dev->out_pipe == 0)
1615                         break;
1616                 dev_info(&intf->dev,
1617                                 "TEST 1:  write %d bytes %u times\n",
1618                                 param->length, param->iterations);
1619                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1620                 if (!urb) {
1621                         retval = -ENOMEM;
1622                         break;
1623                 }
1624                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1625                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
1626                 simple_free_urb (urb);
1627                 break;
1628         case 2:
1629                 if (dev->in_pipe == 0)
1630                         break;
1631                 dev_info(&intf->dev,
1632                                 "TEST 2:  read %d bytes %u times\n",
1633                                 param->length, param->iterations);
1634                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1635                 if (!urb) {
1636                         retval = -ENOMEM;
1637                         break;
1638                 }
1639                 // FIRMWARE:  bulk source (maybe generates short writes)
1640                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
1641                 simple_free_urb (urb);
1642                 break;
1643         case 3:
1644                 if (dev->out_pipe == 0 || param->vary == 0)
1645                         break;
1646                 dev_info(&intf->dev,
1647                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
1648                                 param->vary, param->length, param->iterations);
1649                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1650                 if (!urb) {
1651                         retval = -ENOMEM;
1652                         break;
1653                 }
1654                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1655                 retval = simple_io(dev, urb, param->iterations, param->vary,
1656                                         0, "test3");
1657                 simple_free_urb (urb);
1658                 break;
1659         case 4:
1660                 if (dev->in_pipe == 0 || param->vary == 0)
1661                         break;
1662                 dev_info(&intf->dev,
1663                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
1664                                 param->vary, param->length, param->iterations);
1665                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1666                 if (!urb) {
1667                         retval = -ENOMEM;
1668                         break;
1669                 }
1670                 // FIRMWARE:  bulk source (maybe generates short writes)
1671                 retval = simple_io(dev, urb, param->iterations, param->vary,
1672                                         0, "test4");
1673                 simple_free_urb (urb);
1674                 break;
1675
1676         /* Queued bulk I/O tests */
1677         case 5:
1678                 if (dev->out_pipe == 0 || param->sglen == 0)
1679                         break;
1680                 dev_info(&intf->dev,
1681                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
1682                                 param->iterations,
1683                                 param->sglen, param->length);
1684                 sg = alloc_sglist (param->sglen, param->length, 0);
1685                 if (!sg) {
1686                         retval = -ENOMEM;
1687                         break;
1688                 }
1689                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1690                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1691                                 &req, sg, param->sglen);
1692                 free_sglist (sg, param->sglen);
1693                 break;
1694
1695         case 6:
1696                 if (dev->in_pipe == 0 || param->sglen == 0)
1697                         break;
1698                 dev_info(&intf->dev,
1699                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
1700                                 param->iterations,
1701                                 param->sglen, param->length);
1702                 sg = alloc_sglist (param->sglen, param->length, 0);
1703                 if (!sg) {
1704                         retval = -ENOMEM;
1705                         break;
1706                 }
1707                 // FIRMWARE:  bulk source (maybe generates short writes)
1708                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1709                                 &req, sg, param->sglen);
1710                 free_sglist (sg, param->sglen);
1711                 break;
1712         case 7:
1713                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
1714                         break;
1715                 dev_info(&intf->dev,
1716                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
1717                                 param->vary, param->iterations,
1718                                 param->sglen, param->length);
1719                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1720                 if (!sg) {
1721                         retval = -ENOMEM;
1722                         break;
1723                 }
1724                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1725                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1726                                 &req, sg, param->sglen);
1727                 free_sglist (sg, param->sglen);
1728                 break;
1729         case 8:
1730                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
1731                         break;
1732                 dev_info(&intf->dev,
1733                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
1734                                 param->vary, param->iterations,
1735                                 param->sglen, param->length);
1736                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1737                 if (!sg) {
1738                         retval = -ENOMEM;
1739                         break;
1740                 }
1741                 // FIRMWARE:  bulk source (maybe generates short writes)
1742                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1743                                 &req, sg, param->sglen);
1744                 free_sglist (sg, param->sglen);
1745                 break;
1746
1747         /* non-queued sanity tests for control (chapter 9 subset) */
1748         case 9:
1749                 retval = 0;
1750                 dev_info(&intf->dev,
1751                         "TEST 9:  ch9 (subset) control tests, %d times\n",
1752                                 param->iterations);
1753                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1754                         retval = ch9_postconfig (dev);
1755                 if (retval)
1756                         dev_err(&intf->dev, "ch9 subset failed, "
1757                                         "iterations left %d\n", i);
1758                 break;
1759
1760         /* queued control messaging */
1761         case 10:
1762                 if (param->sglen == 0)
1763                         break;
1764                 retval = 0;
1765                 dev_info(&intf->dev,
1766                                 "TEST 10:  queue %d control calls, %d times\n",
1767                                 param->sglen,
1768                                 param->iterations);
1769                 retval = test_ctrl_queue (dev, param);
1770                 break;
1771
1772         /* simple non-queued unlinks (ring with one urb) */
1773         case 11:
1774                 if (dev->in_pipe == 0 || !param->length)
1775                         break;
1776                 retval = 0;
1777                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
1778                                 param->iterations, param->length);
1779                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1780                         retval = unlink_simple (dev, dev->in_pipe,
1781                                                 param->length);
1782                 if (retval)
1783                         dev_err(&intf->dev, "unlink reads failed %d, "
1784                                 "iterations left %d\n", retval, i);
1785                 break;
1786         case 12:
1787                 if (dev->out_pipe == 0 || !param->length)
1788                         break;
1789                 retval = 0;
1790                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
1791                                 param->iterations, param->length);
1792                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1793                         retval = unlink_simple (dev, dev->out_pipe,
1794                                                 param->length);
1795                 if (retval)
1796                         dev_err(&intf->dev, "unlink writes failed %d, "
1797                                 "iterations left %d\n", retval, i);
1798                 break;
1799
1800         /* ep halt tests */
1801         case 13:
1802                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
1803                         break;
1804                 retval = 0;
1805                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
1806                                 param->iterations);
1807                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1808                         retval = halt_simple (dev);
1809
1810                 if (retval)
1811                         ERROR(dev, "halts failed, iterations left %d\n", i);
1812                 break;
1813
1814         /* control write tests */
1815         case 14:
1816                 if (!dev->info->ctrl_out)
1817                         break;
1818                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
1819                                 param->iterations,
1820                                 realworld ? 1 : 0, param->length,
1821                                 param->vary);
1822                 retval = ctrl_out(dev, param->iterations,
1823                                 param->length, param->vary);
1824                 break;
1825
1826         /* iso write tests */
1827         case 15:
1828                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
1829                         break;
1830                 dev_info(&intf->dev,
1831                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
1832                                 param->iterations,
1833                                 param->sglen, param->length);
1834                 // FIRMWARE:  iso sink
1835                 retval = test_iso_queue (dev, param,
1836                                 dev->out_iso_pipe, dev->iso_out);
1837                 break;
1838
1839         /* iso read tests */
1840         case 16:
1841                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
1842                         break;
1843                 dev_info(&intf->dev,
1844                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
1845                                 param->iterations,
1846                                 param->sglen, param->length);
1847                 // FIRMWARE:  iso source
1848                 retval = test_iso_queue (dev, param,
1849                                 dev->in_iso_pipe, dev->iso_in);
1850                 break;
1851
1852         // FIXME unlink from queue (ring with N urbs)
1853
1854         // FIXME scatterlist cancel (needs helper thread)
1855
1856         }
1857         do_gettimeofday (&param->duration);
1858         param->duration.tv_sec -= start.tv_sec;
1859         param->duration.tv_usec -= start.tv_usec;
1860         if (param->duration.tv_usec < 0) {
1861                 param->duration.tv_usec += 1000 * 1000;
1862                 param->duration.tv_sec -= 1;
1863         }
1864         mutex_unlock(&dev->lock);
1865         return retval;
1866 }
1867
1868 /*-------------------------------------------------------------------------*/
1869
1870 static unsigned force_interrupt = 0;
1871 module_param (force_interrupt, uint, 0);
1872 MODULE_PARM_DESC (force_interrupt, "0 = test default; else interrupt");
1873
1874 #ifdef  GENERIC
1875 static unsigned short vendor;
1876 module_param(vendor, ushort, 0);
1877 MODULE_PARM_DESC (vendor, "vendor code (from usb-if)");
1878
1879 static unsigned short product;
1880 module_param(product, ushort, 0);
1881 MODULE_PARM_DESC (product, "product code (from vendor)");
1882 #endif
1883
1884 static int
1885 usbtest_probe (struct usb_interface *intf, const struct usb_device_id *id)
1886 {
1887         struct usb_device       *udev;
1888         struct usbtest_dev      *dev;
1889         struct usbtest_info     *info;
1890         char                    *rtest, *wtest;
1891         char                    *irtest, *iwtest;
1892
1893         udev = interface_to_usbdev (intf);
1894
1895 #ifdef  GENERIC
1896         /* specify devices by module parameters? */
1897         if (id->match_flags == 0) {
1898                 /* vendor match required, product match optional */
1899                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
1900                         return -ENODEV;
1901                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
1902                         return -ENODEV;
1903                 dev_info(&intf->dev, "matched module params, "
1904                                         "vend=0x%04x prod=0x%04x\n",
1905                                 le16_to_cpu(udev->descriptor.idVendor),
1906                                 le16_to_cpu(udev->descriptor.idProduct));
1907         }
1908 #endif
1909
1910         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1911         if (!dev)
1912                 return -ENOMEM;
1913         info = (struct usbtest_info *) id->driver_info;
1914         dev->info = info;
1915         mutex_init(&dev->lock);
1916
1917         dev->intf = intf;
1918
1919         /* cacheline-aligned scratch for i/o */
1920         if ((dev->buf = kmalloc (TBUF_SIZE, GFP_KERNEL)) == NULL) {
1921                 kfree (dev);
1922                 return -ENOMEM;
1923         }
1924
1925         /* NOTE this doesn't yet test the handful of difference that are
1926          * visible with high speed interrupts:  bigger maxpacket (1K) and
1927          * "high bandwidth" modes (up to 3 packets/uframe).
1928          */
1929         rtest = wtest = "";
1930         irtest = iwtest = "";
1931         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
1932                 if (info->ep_in) {
1933                         dev->in_pipe = usb_rcvintpipe (udev, info->ep_in);
1934                         rtest = " intr-in";
1935                 }
1936                 if (info->ep_out) {
1937                         dev->out_pipe = usb_sndintpipe (udev, info->ep_out);
1938                         wtest = " intr-out";
1939                 }
1940         } else {
1941                 if (info->autoconf) {
1942                         int status;
1943
1944                         status = get_endpoints (dev, intf);
1945                         if (status < 0) {
1946                                 WARNING(dev, "couldn't get endpoints, %d\n",
1947                                                 status);
1948                                 return status;
1949                         }
1950                         /* may find bulk or ISO pipes */
1951                 } else {
1952                         if (info->ep_in)
1953                                 dev->in_pipe = usb_rcvbulkpipe (udev,
1954                                                         info->ep_in);
1955                         if (info->ep_out)
1956                                 dev->out_pipe = usb_sndbulkpipe (udev,
1957                                                         info->ep_out);
1958                 }
1959                 if (dev->in_pipe)
1960                         rtest = " bulk-in";
1961                 if (dev->out_pipe)
1962                         wtest = " bulk-out";
1963                 if (dev->in_iso_pipe)
1964                         irtest = " iso-in";
1965                 if (dev->out_iso_pipe)
1966                         iwtest = " iso-out";
1967         }
1968
1969         usb_set_intfdata (intf, dev);
1970         dev_info (&intf->dev, "%s\n", info->name);
1971         dev_info (&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
1972                         ({ char *tmp;
1973                         switch (udev->speed) {
1974                         case USB_SPEED_LOW: tmp = "low"; break;
1975                         case USB_SPEED_FULL: tmp = "full"; break;
1976                         case USB_SPEED_HIGH: tmp = "high"; break;
1977                         default: tmp = "unknown"; break;
1978                         }; tmp; }),
1979                         info->ctrl_out ? " in/out" : "",
1980                         rtest, wtest,
1981                         irtest, iwtest,
1982                         info->alt >= 0 ? " (+alt)" : "");
1983         return 0;
1984 }
1985
1986 static int usbtest_suspend (struct usb_interface *intf, pm_message_t message)
1987 {
1988         return 0;
1989 }
1990
1991 static int usbtest_resume (struct usb_interface *intf)
1992 {
1993         return 0;
1994 }
1995
1996
1997 static void usbtest_disconnect (struct usb_interface *intf)
1998 {
1999         struct usbtest_dev      *dev = usb_get_intfdata (intf);
2000
2001         usb_set_intfdata (intf, NULL);
2002         dev_dbg (&intf->dev, "disconnect\n");
2003         kfree (dev);
2004 }
2005
2006 /* Basic testing only needs a device that can source or sink bulk traffic.
2007  * Any device can test control transfers (default with GENERIC binding).
2008  *
2009  * Several entries work with the default EP0 implementation that's built
2010  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2011  * by (very) small config EEPROMS, but otherwise all these devices act
2012  * identically until firmware is loaded:  only EP0 works.  It turns out
2013  * to be easy to make other endpoints work, without modifying that EP0
2014  * behavior.  For now, we expect that kind of firmware.
2015  */
2016
2017 /* an21xx or fx versions of ez-usb */
2018 static struct usbtest_info ez1_info = {
2019         .name           = "EZ-USB device",
2020         .ep_in          = 2,
2021         .ep_out         = 2,
2022         .alt            = 1,
2023 };
2024
2025 /* fx2 version of ez-usb */
2026 static struct usbtest_info ez2_info = {
2027         .name           = "FX2 device",
2028         .ep_in          = 6,
2029         .ep_out         = 2,
2030         .alt            = 1,
2031 };
2032
2033 /* ezusb family device with dedicated usb test firmware,
2034  */
2035 static struct usbtest_info fw_info = {
2036         .name           = "usb test device",
2037         .ep_in          = 2,
2038         .ep_out         = 2,
2039         .alt            = 1,
2040         .autoconf       = 1,            // iso and ctrl_out need autoconf
2041         .ctrl_out       = 1,
2042         .iso            = 1,            // iso_ep's are #8 in/out
2043 };
2044
2045 /* peripheral running Linux and 'zero.c' test firmware, or
2046  * its user-mode cousin. different versions of this use
2047  * different hardware with the same vendor/product codes.
2048  * host side MUST rely on the endpoint descriptors.
2049  */
2050 static struct usbtest_info gz_info = {
2051         .name           = "Linux gadget zero",
2052         .autoconf       = 1,
2053         .ctrl_out       = 1,
2054         .alt            = 0,
2055 };
2056
2057 static struct usbtest_info um_info = {
2058         .name           = "Linux user mode test driver",
2059         .autoconf       = 1,
2060         .alt            = -1,
2061 };
2062
2063 static struct usbtest_info um2_info = {
2064         .name           = "Linux user mode ISO test driver",
2065         .autoconf       = 1,
2066         .iso            = 1,
2067         .alt            = -1,
2068 };
2069
2070 #ifdef IBOT2
2071 /* this is a nice source of high speed bulk data;
2072  * uses an FX2, with firmware provided in the device
2073  */
2074 static struct usbtest_info ibot2_info = {
2075         .name           = "iBOT2 webcam",
2076         .ep_in          = 2,
2077         .alt            = -1,
2078 };
2079 #endif
2080
2081 #ifdef GENERIC
2082 /* we can use any device to test control traffic */
2083 static struct usbtest_info generic_info = {
2084         .name           = "Generic USB device",
2085         .alt            = -1,
2086 };
2087 #endif
2088
2089
2090 static struct usb_device_id id_table [] = {
2091
2092         /*-------------------------------------------------------------*/
2093
2094         /* EZ-USB devices which download firmware to replace (or in our
2095          * case augment) the default device implementation.
2096          */
2097
2098         /* generic EZ-USB FX controller */
2099         { USB_DEVICE (0x0547, 0x2235),
2100                 .driver_info = (unsigned long) &ez1_info,
2101                 },
2102
2103         /* CY3671 development board with EZ-USB FX */
2104         { USB_DEVICE (0x0547, 0x0080),
2105                 .driver_info = (unsigned long) &ez1_info,
2106                 },
2107
2108         /* generic EZ-USB FX2 controller (or development board) */
2109         { USB_DEVICE (0x04b4, 0x8613),
2110                 .driver_info = (unsigned long) &ez2_info,
2111                 },
2112
2113         /* re-enumerated usb test device firmware */
2114         { USB_DEVICE (0xfff0, 0xfff0),
2115                 .driver_info = (unsigned long) &fw_info,
2116                 },
2117
2118         /* "Gadget Zero" firmware runs under Linux */
2119         { USB_DEVICE (0x0525, 0xa4a0),
2120                 .driver_info = (unsigned long) &gz_info,
2121                 },
2122
2123         /* so does a user-mode variant */
2124         { USB_DEVICE (0x0525, 0xa4a4),
2125                 .driver_info = (unsigned long) &um_info,
2126                 },
2127
2128         /* ... and a user-mode variant that talks iso */
2129         { USB_DEVICE (0x0525, 0xa4a3),
2130                 .driver_info = (unsigned long) &um2_info,
2131                 },
2132
2133 #ifdef KEYSPAN_19Qi
2134         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2135         // this does not coexist with the real Keyspan 19qi driver!
2136         { USB_DEVICE (0x06cd, 0x010b),
2137                 .driver_info = (unsigned long) &ez1_info,
2138                 },
2139 #endif
2140
2141         /*-------------------------------------------------------------*/
2142
2143 #ifdef IBOT2
2144         /* iBOT2 makes a nice source of high speed bulk-in data */
2145         // this does not coexist with a real iBOT2 driver!
2146         { USB_DEVICE (0x0b62, 0x0059),
2147                 .driver_info = (unsigned long) &ibot2_info,
2148                 },
2149 #endif
2150
2151         /*-------------------------------------------------------------*/
2152
2153 #ifdef GENERIC
2154         /* module params can specify devices to use for control tests */
2155         { .driver_info = (unsigned long) &generic_info, },
2156 #endif
2157
2158         /*-------------------------------------------------------------*/
2159
2160         { }
2161 };
2162 MODULE_DEVICE_TABLE (usb, id_table);
2163
2164 static struct usb_driver usbtest_driver = {
2165         .name =         "usbtest",
2166         .id_table =     id_table,
2167         .probe =        usbtest_probe,
2168         .ioctl =        usbtest_ioctl,
2169         .disconnect =   usbtest_disconnect,
2170         .suspend =      usbtest_suspend,
2171         .resume =       usbtest_resume,
2172 };
2173
2174 /*-------------------------------------------------------------------------*/
2175
2176 static int __init usbtest_init (void)
2177 {
2178 #ifdef GENERIC
2179         if (vendor)
2180                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2181 #endif
2182         return usb_register (&usbtest_driver);
2183 }
2184 module_init (usbtest_init);
2185
2186 static void __exit usbtest_exit (void)
2187 {
2188         usb_deregister (&usbtest_driver);
2189 }
2190 module_exit (usbtest_exit);
2191
2192 MODULE_DESCRIPTION ("USB Core/HCD Testing Driver");
2193 MODULE_LICENSE ("GPL");
2194