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
  10 #include <linux/usb.h>
  11
  12
  13 /*-------------------------------------------------------------------------*/
  14
  15 // FIXME make these public somewhere; usbdevfs.h?
  16 //
  17 struct usbtest_param {
  18         // inputs
  19         unsigned                test_num;       /* 0..(TEST_CASES-1) */
  20         unsigned                iterations;
  21         unsigned                length;
  22         unsigned                vary;
  23         unsigned                sglen;
  24
  25         // outputs
  26         struct timeval          duration;
  27 };
  28 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
  29
  30 /*-------------------------------------------------------------------------*/
  31
  32 #define GENERIC         /* let probe() bind using module params */
  33
  34 /* Some devices that can be used for testing will have "real" drivers.
  35  * Entries for those need to be enabled here by hand, after disabling
  36  * that "real" driver.
  37  */
  38 //#define       IBOT2           /* grab iBOT2 webcams */
  39 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
  40
  41 /*-------------------------------------------------------------------------*/
  42
  43 struct usbtest_info {
  44         const char              *name;
  45         u8                      ep_in;          /* bulk/intr source */
  46         u8                      ep_out;         /* bulk/intr sink */
  47         unsigned                autoconf : 1;
  48         unsigned                ctrl_out : 1;
  49         unsigned                iso : 1;        /* try iso in/out */
  50         int                     alt;
  51 };
  52
  53 /* this is accessed only through usbfs ioctl calls.
  54  * one ioctl to issue a test ... one lock per device.
  55  * tests create other threads if they need them.
  56  * urbs and buffers are allocated dynamically,
  57  * and data generated deterministically.
  58  */
  59 struct usbtest_dev {
  60         struct usb_interface    *intf;
  61         struct usbtest_info     *info;
  62         int                     in_pipe;
  63         int                     out_pipe;
  64         int                     in_iso_pipe;
  65         int                     out_iso_pipe;
  66         struct usb_endpoint_descriptor  *iso_in, *iso_out;
  67         struct semaphore        sem;
  68
  69 #define TBUF_SIZE       256
  70         u8                      *buf;
  71 };
  72
  73 static struct usb_device *testdev_to_usbdev (struct usbtest_dev *test)
  74 {
  75         return interface_to_usbdev (test->intf);
  76 }
  77
  78 /* set up all urbs so they can be used with either bulk or interrupt */
  79 #define INTERRUPT_RATE          1       /* msec/transfer */
  80
  81 #define xprintk(tdev,level,fmt,args...) \
  82         dev_printk(level ,  &(tdev)->intf->dev ,  fmt ,  ## args)
  83
  84 #ifdef DEBUG
  85 #define DBG(dev,fmt,args...) \
  86         xprintk(dev , KERN_DEBUG , fmt , ## args)
  87 #else
  88 #define DBG(dev,fmt,args...) \
  89         do { } while (0)
  90 #endif /* DEBUG */
  91
  92 #ifdef VERBOSE
  93 #define VDBG DBG
  94 #else
  95 #define VDBG(dev,fmt,args...) \
  96         do { } while (0)
  97 #endif  /* VERBOSE */
  98
  99 #define ERROR(dev,fmt,args...) \
 100         xprintk(dev , KERN_ERR , fmt , ## args)
 101 #define WARN(dev,fmt,args...) \
 102         xprintk(dev , KERN_WARNING , fmt , ## args)
 103 #define INFO(dev,fmt,args...) \
 104         xprintk(dev , KERN_INFO , fmt , ## args)
 105
 106 /*-------------------------------------------------------------------------*/
 107
 108 static int
 109 get_endpoints (struct usbtest_dev *dev, struct usb_interface *intf)
 110 {
 111         int                             tmp;
 112         struct usb_host_interface       *alt;
 113         struct usb_host_endpoint        *in, *out;
 114         struct usb_host_endpoint        *iso_in, *iso_out;
 115         struct usb_device               *udev;
 116
 117         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
 118                 unsigned        ep;
 119
 120                 in = out = NULL;
 121                 iso_in = iso_out = NULL;
 122                 alt = intf->altsetting + tmp;
 123
 124                 /* take the first altsetting with in-bulk + out-bulk;
 125                  * ignore other endpoints and altsetttings.
 126                  */
 127                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
 128                         struct usb_host_endpoint        *e;
 129
 130                         e = alt->endpoint + ep;
 131                         switch (e->desc.bmAttributes) {
 132                         case USB_ENDPOINT_XFER_BULK:
 133                                 break;
 134                         case USB_ENDPOINT_XFER_ISOC:
 135                                 if (dev->info->iso)
 136                                         goto try_iso;
 137                                 // FALLTHROUGH
 138                         default:
 139                                 continue;
 140                         }
 141                         if (e->desc.bEndpointAddress & USB_DIR_IN) {
 142                                 if (!in)
 143                                         in = e;
 144                         } else {
 145                                 if (!out)
 146                                         out = e;
 147                         }
 148                         continue;
 149 try_iso:
 150                         if (e->desc.bEndpointAddress & USB_DIR_IN) {
 151                                 if (!iso_in)
 152                                         iso_in = e;
 153                         } else {
 154                                 if (!iso_out)
 155                                         iso_out = e;
 156                         }
 157                 }
 158                 if ((in && out)  ||  (iso_in && iso_out))
 159                         goto found;
 160         }
 161         return -EINVAL;
 162
 163 found:
 164         udev = testdev_to_usbdev (dev);
 165         if (alt->desc.bAlternateSetting != 0) {
 166                 tmp = usb_set_interface (udev,
 167                                 alt->desc.bInterfaceNumber,
 168                                 alt->desc.bAlternateSetting);
 169                 if (tmp < 0)
 170                         return tmp;
 171         }
 172
 173         if (in) {
 174                 dev->in_pipe = usb_rcvbulkpipe (udev,
 175                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 176                 dev->out_pipe = usb_sndbulkpipe (udev,
 177                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 178         }
 179         if (iso_in) {
 180                 dev->iso_in = &iso_in->desc;
 181                 dev->in_iso_pipe = usb_rcvisocpipe (udev,
 182                                 iso_in->desc.bEndpointAddress
 183                                         & USB_ENDPOINT_NUMBER_MASK);
 184                 dev->iso_out = &iso_out->desc;
 185                 dev->out_iso_pipe = usb_sndisocpipe (udev,
 186                                 iso_out->desc.bEndpointAddress
 187                                         & USB_ENDPOINT_NUMBER_MASK);
 188         }
 189         return 0;
 190 }
 191
 192 /*-------------------------------------------------------------------------*/
 193
 194 /* Support for testing basic non-queued I/O streams.
 195  *
 196  * These just package urbs as requests that can be easily canceled.
 197  * Each urb's data buffer is dynamically allocated; callers can fill
 198  * them with non-zero test data (or test for it) when appropriate.
 199  */
 200
 201 static void simple_callback (struct urb *urb, struct pt_regs *regs)
 202 {
 203         complete ((struct completion *) urb->context);
 204 }
 205
 206 static struct urb *simple_alloc_urb (
 207         struct usb_device       *udev,
 208         int                     pipe,
 209         unsigned long           bytes
 210 )
 211 {
 212         struct urb              *urb;
 213
 214         if (bytes < 0)
 215                 return NULL;
 216         urb = usb_alloc_urb (0, SLAB_KERNEL);
 217         if (!urb)
 218                 return urb;
 219         usb_fill_bulk_urb (urb, udev, pipe, NULL, bytes, simple_callback, NULL);
 220         urb->interval = (udev->speed == USB_SPEED_HIGH)
 221                         ? (INTERRUPT_RATE << 3)
 222                         : INTERRUPT_RATE;
 223         urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 224         if (usb_pipein (pipe))
 225                 urb->transfer_flags |= URB_SHORT_NOT_OK;
 226         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, SLAB_KERNEL,
 227                         &urb->transfer_dma);
 228         if (!urb->transfer_buffer) {
 229                 usb_free_urb (urb);
 230                 urb = NULL;
 231         } else
 232                 memset (urb->transfer_buffer, 0, bytes);
 233         return urb;
 234 }
 235
 236 static unsigned pattern = 0;
 237 module_param (pattern, uint, S_IRUGO);
 238 // MODULE_PARM_DESC (pattern, "i/o pattern (0 == zeroes)");
 239
 240 static inline void simple_fill_buf (struct urb *urb)
 241 {
 242         unsigned        i;
 243         u8              *buf = urb->transfer_buffer;
 244         unsigned        len = urb->transfer_buffer_length;
 245
 246         switch (pattern) {
 247         default:
 248                 // FALLTHROUGH
 249         case 0:
 250                 memset (buf, 0, len);
 251                 break;
 252         case 1:                 /* mod63 */
 253                 for (i = 0; i < len; i++)
 254                         *buf++ = (u8) (i % 63);
 255                 break;
 256         }
 257 }
 258
 259 static inline int simple_check_buf (struct urb *urb)
 260 {
 261         unsigned        i;
 262         u8              expected;
 263         u8              *buf = urb->transfer_buffer;
 264         unsigned        len = urb->actual_length;
 265
 266         for (i = 0; i < len; i++, buf++) {
 267                 switch (pattern) {
 268                 /* all-zeroes has no synchronization issues */
 269                 case 0:
 270                         expected = 0;
 271                         break;
 272                 /* mod63 stays in sync with short-terminated transfers,
 273                  * or otherwise when host and gadget agree on how large
 274                  * each usb transfer request should be.  resync is done
 275                  * with set_interface or set_config.
 276                  */
 277                 case 1:                 /* mod63 */
 278                         expected = i % 63;
 279                         break;
 280                 /* always fail unsupported patterns */
 281                 default:
 282                         expected = !*buf;
 283                         break;
 284                 }
 285                 if (*buf == expected)
 286                         continue;
 287                 dbg ("buf[%d] = %d (not %d)", i, *buf, expected);
 288                 return -EINVAL;
 289         }
 290         return 0;
 291 }
 292
 293 static void simple_free_urb (struct urb *urb)
 294 {
 295         usb_buffer_free (urb->dev, urb->transfer_buffer_length,
 296                         urb->transfer_buffer, urb->transfer_dma);
 297         usb_free_urb (urb);
 298 }
 299
 300 static int simple_io (
 301         struct urb              *urb,
 302         int                     iterations,
 303         int                     vary,
 304         int                     expected,
 305         const char              *label
 306 )
 307 {
 308         struct usb_device       *udev = urb->dev;
 309         int                     max = urb->transfer_buffer_length;
 310         struct completion       completion;
 311         int                     retval = 0;
 312
 313         urb->context = &completion;
 314         while (retval == 0 && iterations-- > 0) {
 315                 init_completion (&completion);
 316                 if (usb_pipeout (urb->pipe))
 317                         simple_fill_buf (urb);
 318                 if ((retval = usb_submit_urb (urb, SLAB_KERNEL)) != 0)
 319                         break;
 320
 321                 /* NOTE:  no timeouts; can't be broken out of by interrupt */
 322                 wait_for_completion (&completion);
 323                 retval = urb->status;
 324                 urb->dev = udev;
 325                 if (retval == 0 && usb_pipein (urb->pipe))
 326                         retval = simple_check_buf (urb);
 327
 328                 if (vary) {
 329                         int     len = urb->transfer_buffer_length;
 330
 331                         len += vary;
 332                         len %= max;
 333                         if (len == 0)
 334                                 len = (vary < max) ? vary : max;
 335                         urb->transfer_buffer_length = len;
 336                 }
 337
 338                 /* FIXME if endpoint halted, clear halt (and log) */
 339         }
 340         urb->transfer_buffer_length = max;
 341
 342         if (expected != retval)
 343                 dev_dbg (&udev->dev,
 344                         "%s failed, iterations left %d, status %d (not %d)\n",
 345                                 label, iterations, retval, expected);
 346         return retval;
 347 }
 348
 349
 350 /*-------------------------------------------------------------------------*/
 351
 352 /* We use scatterlist primitives to test queued I/O.
 353  * Yes, this also tests the scatterlist primitives.
 354  */
 355
 356 static void free_sglist (struct scatterlist *sg, int nents)
 357 {
 358         unsigned                i;
 359
 360         if (!sg)
 361                 return;
 362         for (i = 0; i < nents; i++) {
 363                 if (!sg [i].page)
 364                         continue;
 365                 kfree (page_address (sg [i].page) + sg [i].offset);
 366         }
 367         kfree (sg);
 368 }
 369
 370 static struct scatterlist *
 371 alloc_sglist (int nents, int max, int vary)
 372 {
 373         struct scatterlist      *sg;
 374         unsigned                i;
 375         unsigned                size = max;
 376
 377         sg = kmalloc (nents * sizeof *sg, SLAB_KERNEL);
 378         if (!sg)
 379                 return NULL;
 380
 381         for (i = 0; i < nents; i++) {
 382                 char            *buf;
 383                 unsigned        j;
 384
 385                 buf = kzalloc (size, SLAB_KERNEL);
 386                 if (!buf) {
 387                         free_sglist (sg, i);
 388                         return NULL;
 389                 }
 390
 391                 /* kmalloc pages are always physically contiguous! */
 392                 sg_init_one(&sg[i], buf, size);
 393
 394                 switch (pattern) {
 395                 case 0:
 396                         /* already zeroed */
 397                         break;
 398                 case 1:
 399                         for (j = 0; j < size; j++)
 400                                 *buf++ = (u8) (j % 63);
 401                         break;
 402                 }
 403
 404                 if (vary) {
 405                         size += vary;
 406                         size %= max;
 407                         if (size == 0)
 408                                 size = (vary < max) ? vary : max;
 409                 }
 410         }
 411
 412         return sg;
 413 }
 414
 415 static int perform_sglist (
 416         struct usb_device       *udev,
 417         unsigned                iterations,
 418         int                     pipe,
 419         struct usb_sg_request   *req,
 420         struct scatterlist      *sg,
 421         int                     nents
 422 )
 423 {
 424         int                     retval = 0;
 425
 426         while (retval == 0 && iterations-- > 0) {
 427                 retval = usb_sg_init (req, udev, pipe,
 428                                 (udev->speed == USB_SPEED_HIGH)
 429                                         ? (INTERRUPT_RATE << 3)
 430                                         : INTERRUPT_RATE,
 431                                 sg, nents, 0, SLAB_KERNEL);
 432
 433                 if (retval)
 434                         break;
 435                 usb_sg_wait (req);
 436                 retval = req->status;
 437
 438                 /* FIXME check resulting data pattern */
 439
 440                 /* FIXME if endpoint halted, clear halt (and log) */
 441         }
 442
 443         // FIXME for unlink or fault handling tests, don't report
 444         // failure if retval is as we expected ...
 445
 446         if (retval)
 447                 dbg ("perform_sglist failed, iterations left %d, status %d",
 448                                 iterations, retval);
 449         return retval;
 450 }
 451
 452
 453 /*-------------------------------------------------------------------------*/
 454
 455 /* unqueued control message testing
 456  *
 457  * there's a nice set of device functional requirements in chapter 9 of the
 458  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
 459  * special test firmware.
 460  *
 461  * we know the device is configured (or suspended) by the time it's visible
 462  * through usbfs.  we can't change that, so we won't test enumeration (which
 463  * worked 'well enough' to get here, this time), power management (ditto),
 464  * or remote wakeup (which needs human interaction).
 465  */
 466
 467 static unsigned realworld = 1;
 468 module_param (realworld, uint, 0);
 469 MODULE_PARM_DESC (realworld, "clear to demand stricter spec compliance");
 470
 471 static int get_altsetting (struct usbtest_dev *dev)
 472 {
 473         struct usb_interface    *iface = dev->intf;
 474         struct usb_device       *udev = interface_to_usbdev (iface);
 475         int                     retval;
 476
 477         retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 478                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
 479                         0, iface->altsetting [0].desc.bInterfaceNumber,
 480                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 481         switch (retval) {
 482         case 1:
 483                 return dev->buf [0];
 484         case 0:
 485                 retval = -ERANGE;
 486                 // FALLTHROUGH
 487         default:
 488                 return retval;
 489         }
 490 }
 491
 492 static int set_altsetting (struct usbtest_dev *dev, int alternate)
 493 {
 494         struct usb_interface            *iface = dev->intf;
 495         struct usb_device               *udev;
 496
 497         if (alternate < 0 || alternate >= 256)
 498                 return -EINVAL;
 499
 500         udev = interface_to_usbdev (iface);
 501         return usb_set_interface (udev,
 502                         iface->altsetting [0].desc.bInterfaceNumber,
 503                         alternate);
 504 }
 505
 506 static int is_good_config (char *buf, int len)
 507 {
 508         struct usb_config_descriptor    *config;
 509
 510         if (len < sizeof *config)
 511                 return 0;
 512         config = (struct usb_config_descriptor *) buf;
 513
 514         switch (config->bDescriptorType) {
 515         case USB_DT_CONFIG:
 516         case USB_DT_OTHER_SPEED_CONFIG:
 517                 if (config->bLength != 9) {
 518                         dbg ("bogus config descriptor length");
 519                         return 0;
 520                 }
 521                 /* this bit 'must be 1' but often isn't */
 522                 if (!realworld && !(config->bmAttributes & 0x80)) {
 523                         dbg ("high bit of config attributes not set");
 524                         return 0;
 525                 }
 526                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
 527                         dbg ("reserved config bits set");
 528                         return 0;
 529                 }
 530                 break;
 531         default:
 532                 return 0;
 533         }
 534
 535         if (le16_to_cpu(config->wTotalLength) == len)           /* read it all */
 536                 return 1;
 537         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)             /* max partial read */
 538                 return 1;
 539         dbg ("bogus config descriptor read size");
 540         return 0;
 541 }
 542
 543 /* sanity test for standard requests working with usb_control_mesg() and some
 544  * of the utility functions which use it.
 545  *
 546  * this doesn't test how endpoint halts behave or data toggles get set, since
 547  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
 548  * halt or toggle).  toggle testing is impractical without support from hcds.
 549  *
 550  * this avoids failing devices linux would normally work with, by not testing
 551  * config/altsetting operations for devices that only support their defaults.
 552  * such devices rarely support those needless operations.
 553  *
 554  * NOTE that since this is a sanity test, it's not examining boundary cases
 555  * to see if usbcore, hcd, and device all behave right.  such testing would
 556  * involve varied read sizes and other operation sequences.
 557  */
 558 static int ch9_postconfig (struct usbtest_dev *dev)
 559 {
 560         struct usb_interface    *iface = dev->intf;
 561         struct usb_device       *udev = interface_to_usbdev (iface);
 562         int                     i, alt, retval;
 563
 564         /* [9.2.3] if there's more than one altsetting, we need to be able to
 565          * set and get each one.  mostly trusts the descriptors from usbcore.
 566          */
 567         for (i = 0; i < iface->num_altsetting; i++) {
 568
 569                 /* 9.2.3 constrains the range here */
 570                 alt = iface->altsetting [i].desc.bAlternateSetting;
 571                 if (alt < 0 || alt >= iface->num_altsetting) {
 572                         dev_dbg (&iface->dev,
 573                                         "invalid alt [%d].bAltSetting = %d\n",
 574                                         i, alt);
 575                 }
 576
 577                 /* [real world] get/set unimplemented if there's only one */
 578                 if (realworld && iface->num_altsetting == 1)
 579                         continue;
 580
 581                 /* [9.4.10] set_interface */
 582                 retval = set_altsetting (dev, alt);
 583                 if (retval) {
 584                         dev_dbg (&iface->dev, "can't set_interface = %d, %d\n",
 585                                         alt, retval);
 586                         return retval;
 587                 }
 588
 589                 /* [9.4.4] get_interface always works */
 590                 retval = get_altsetting (dev);
 591                 if (retval != alt) {
 592                         dev_dbg (&iface->dev, "get alt should be %d, was %d\n",
 593                                         alt, retval);
 594                         return (retval < 0) ? retval : -EDOM;
 595                 }
 596
 597         }
 598
 599         /* [real world] get_config unimplemented if there's only one */
 600         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
 601                 int     expected = udev->actconfig->desc.bConfigurationValue;
 602
 603                 /* [9.4.2] get_configuration always works
 604                  * ... although some cheap devices (like one TI Hub I've got)
 605                  * won't return config descriptors except before set_config.
 606                  */
 607                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 608                                 USB_REQ_GET_CONFIGURATION,
 609                                 USB_DIR_IN | USB_RECIP_DEVICE,
 610                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 611                 if (retval != 1 || dev->buf [0] != expected) {
 612                         dev_dbg (&iface->dev, "get config --> %d %d (1 %d)\n",
 613                                 retval, dev->buf[0], expected);
 614                         return (retval < 0) ? retval : -EDOM;
 615                 }
 616         }
 617
 618         /* there's always [9.4.3] a device descriptor [9.6.1] */
 619         retval = usb_get_descriptor (udev, USB_DT_DEVICE, 0,
 620                         dev->buf, sizeof udev->descriptor);
 621         if (retval != sizeof udev->descriptor) {
 622                 dev_dbg (&iface->dev, "dev descriptor --> %d\n", retval);
 623                 return (retval < 0) ? retval : -EDOM;
 624         }
 625
 626         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
 627         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
 628                 retval = usb_get_descriptor (udev, USB_DT_CONFIG, i,
 629                                 dev->buf, TBUF_SIZE);
 630                 if (!is_good_config (dev->buf, retval)) {
 631                         dev_dbg (&iface->dev,
 632                                         "config [%d] descriptor --> %d\n",
 633                                         i, retval);
 634                         return (retval < 0) ? retval : -EDOM;
 635                 }
 636
 637                 // FIXME cross-checking udev->config[i] to make sure usbcore
 638                 // parsed it right (etc) would be good testing paranoia
 639         }
 640
 641         /* and sometimes [9.2.6.6] speed dependent descriptors */
 642         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
 643                 struct usb_qualifier_descriptor         *d = NULL;
 644
 645                 /* device qualifier [9.6.2] */
 646                 retval = usb_get_descriptor (udev,
 647                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
 648                                 sizeof (struct usb_qualifier_descriptor));
 649                 if (retval == -EPIPE) {
 650                         if (udev->speed == USB_SPEED_HIGH) {
 651                                 dev_dbg (&iface->dev,
 652                                                 "hs dev qualifier --> %d\n",
 653                                                 retval);
 654                                 return (retval < 0) ? retval : -EDOM;
 655                         }
 656                         /* usb2.0 but not high-speed capable; fine */
 657                 } else if (retval != sizeof (struct usb_qualifier_descriptor)) {
 658                         dev_dbg (&iface->dev, "dev qualifier --> %d\n", retval);
 659                         return (retval < 0) ? retval : -EDOM;
 660                 } else
 661                         d = (struct usb_qualifier_descriptor *) dev->buf;
 662
 663                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
 664                 if (d) {
 665                         unsigned max = d->bNumConfigurations;
 666                         for (i = 0; i < max; i++) {
 667                                 retval = usb_get_descriptor (udev,
 668                                         USB_DT_OTHER_SPEED_CONFIG, i,
 669                                         dev->buf, TBUF_SIZE);
 670                                 if (!is_good_config (dev->buf, retval)) {
 671                                         dev_dbg (&iface->dev,
 672                                                 "other speed config --> %d\n",
 673                                                 retval);
 674                                         return (retval < 0) ? retval : -EDOM;
 675                                 }
 676                         }
 677                 }
 678         }
 679         // FIXME fetch strings from at least the device descriptor
 680
 681         /* [9.4.5] get_status always works */
 682         retval = usb_get_status (udev, USB_RECIP_DEVICE, 0, dev->buf);
 683         if (retval != 2) {
 684                 dev_dbg (&iface->dev, "get dev status --> %d\n", retval);
 685                 return (retval < 0) ? retval : -EDOM;
 686         }
 687
 688         // FIXME configuration.bmAttributes says if we could try to set/clear
 689         // the device's remote wakeup feature ... if we can, test that here
 690
 691         retval = usb_get_status (udev, USB_RECIP_INTERFACE,
 692                         iface->altsetting [0].desc.bInterfaceNumber, dev->buf);
 693         if (retval != 2) {
 694                 dev_dbg (&iface->dev, "get interface status --> %d\n", retval);
 695                 return (retval < 0) ? retval : -EDOM;
 696         }
 697         // FIXME get status for each endpoint in the interface
 698
 699         return 0;
 700 }
 701
 702 /*-------------------------------------------------------------------------*/
 703
 704 /* use ch9 requests to test whether:
 705  *   (a) queues work for control, keeping N subtests queued and
 706  *       active (auto-resubmit) for M loops through the queue.
 707  *   (b) protocol stalls (control-only) will autorecover.
 708  *       it's not like bulk/intr; no halt clearing.
 709  *   (c) short control reads are reported and handled.
 710  *   (d) queues are always processed in-order
 711  */
 712
 713 struct ctrl_ctx {
 714         spinlock_t              lock;
 715         struct usbtest_dev      *dev;
 716         struct completion       complete;
 717         unsigned                count;
 718         unsigned                pending;
 719         int                     status;
 720         struct urb              **urb;
 721         struct usbtest_param    *param;
 722         int                     last;
 723 };
 724
 725 #define NUM_SUBCASES    15              /* how many test subcases here? */
 726
 727 struct subcase {
 728         struct usb_ctrlrequest  setup;
 729         int                     number;
 730         int                     expected;
 731 };
 732
 733 static void ctrl_complete (struct urb *urb, struct pt_regs *regs)
 734 {
 735         struct ctrl_ctx         *ctx = urb->context;
 736         struct usb_ctrlrequest  *reqp;
 737         struct subcase          *subcase;
 738         int                     status = urb->status;
 739
 740         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
 741         subcase = container_of (reqp, struct subcase, setup);
 742
 743         spin_lock (&ctx->lock);
 744         ctx->count--;
 745         ctx->pending--;
 746
 747         /* queue must transfer and complete in fifo order, unless
 748          * usb_unlink_urb() is used to unlink something not at the
 749          * physical queue head (not tested).
 750          */
 751         if (subcase->number > 0) {
 752                 if ((subcase->number - ctx->last) != 1) {
 753                         dbg ("subcase %d completed out of order, last %d",
 754                                         subcase->number, ctx->last);
 755                         status = -EDOM;
 756                         ctx->last = subcase->number;
 757                         goto error;
 758                 }
 759         }
 760         ctx->last = subcase->number;
 761
 762         /* succeed or fault in only one way? */
 763         if (status == subcase->expected)
 764                 status = 0;
 765
 766         /* async unlink for cleanup? */
 767         else if (status != -ECONNRESET) {
 768
 769                 /* some faults are allowed, not required */
 770                 if (subcase->expected > 0 && (
 771                           ((urb->status == -subcase->expected   /* happened */
 772                            || urb->status == 0))))              /* didn't */
 773                         status = 0;
 774                 /* sometimes more than one fault is allowed */
 775                 else if (subcase->number == 12 && status == -EPIPE)
 776                         status = 0;
 777                 else
 778                         dbg ("subtest %d error, status %d",
 779                                         subcase->number, status);
 780         }
 781
 782         /* unexpected status codes mean errors; ideally, in hardware */
 783         if (status) {
 784 error:
 785                 if (ctx->status == 0) {
 786                         int             i;
 787
 788                         ctx->status = status;
 789                         info ("control queue %02x.%02x, err %d, %d left",
 790                                         reqp->bRequestType, reqp->bRequest,
 791                                         status, ctx->count);
 792
 793                         /* FIXME this "unlink everything" exit route should
 794                          * be a separate test case.
 795                          */
 796
 797                         /* unlink whatever's still pending */
 798                         for (i = 1; i < ctx->param->sglen; i++) {
 799                                 struct urb      *u = ctx->urb [
 800         (i + subcase->number) % ctx->param->sglen];
 801
 802                                 if (u == urb || !u->dev)
 803                                         continue;
 804                                 spin_unlock(&ctx->lock);
 805                                 status = usb_unlink_urb (u);
 806                                 spin_lock(&ctx->lock);
 807                                 switch (status) {
 808                                 case -EINPROGRESS:
 809                                 case -EBUSY:
 810                                 case -EIDRM:
 811                                         continue;
 812                                 default:
 813                                         dbg ("urb unlink --> %d", status);
 814                                 }
 815                         }
 816                         status = ctx->status;
 817                 }
 818         }
 819
 820         /* resubmit if we need to, else mark this as done */
 821         if ((status == 0) && (ctx->pending < ctx->count)) {
 822                 if ((status = usb_submit_urb (urb, SLAB_ATOMIC)) != 0) {
 823                         dbg ("can't resubmit ctrl %02x.%02x, err %d",
 824                                 reqp->bRequestType, reqp->bRequest, status);
 825                         urb->dev = NULL;
 826                 } else
 827                         ctx->pending++;
 828         } else
 829                 urb->dev = NULL;
 830
 831         /* signal completion when nothing's queued */
 832         if (ctx->pending == 0)
 833                 complete (&ctx->complete);
 834         spin_unlock (&ctx->lock);
 835 }
 836
 837 static int
 838 test_ctrl_queue (struct usbtest_dev *dev, struct usbtest_param *param)
 839 {
 840         struct usb_device       *udev = testdev_to_usbdev (dev);
 841         struct urb              **urb;
 842         struct ctrl_ctx         context;
 843         int                     i;
 844
 845         spin_lock_init (&context.lock);
 846         context.dev = dev;
 847         init_completion (&context.complete);
 848         context.count = param->sglen * param->iterations;
 849         context.pending = 0;
 850         context.status = -ENOMEM;
 851         context.param = param;
 852         context.last = -1;
 853
 854         /* allocate and init the urbs we'll queue.
 855          * as with bulk/intr sglists, sglen is the queue depth; it also
 856          * controls which subtests run (more tests than sglen) or rerun.
 857          */
 858         urb = kcalloc(param->sglen, sizeof(struct urb *), SLAB_KERNEL);
 859         if (!urb)
 860                 return -ENOMEM;
 861         for (i = 0; i < param->sglen; i++) {
 862                 int                     pipe = usb_rcvctrlpipe (udev, 0);
 863                 unsigned                len;
 864                 struct urb              *u;
 865                 struct usb_ctrlrequest  req;
 866                 struct subcase          *reqp;
 867                 int                     expected = 0;
 868
 869                 /* requests here are mostly expected to succeed on any
 870                  * device, but some are chosen to trigger protocol stalls
 871                  * or short reads.
 872                  */
 873                 memset (&req, 0, sizeof req);
 874                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
 875                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 876
 877                 switch (i % NUM_SUBCASES) {
 878                 case 0:         // get device descriptor
 879                         req.wValue = cpu_to_le16 (USB_DT_DEVICE << 8);
 880                         len = sizeof (struct usb_device_descriptor);
 881                         break;
 882                 case 1:         // get first config descriptor (only)
 883                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 884                         len = sizeof (struct usb_config_descriptor);
 885                         break;
 886                 case 2:         // get altsetting (OFTEN STALLS)
 887                         req.bRequest = USB_REQ_GET_INTERFACE;
 888                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 889                         // index = 0 means first interface
 890                         len = 1;
 891                         expected = EPIPE;
 892                         break;
 893                 case 3:         // get interface status
 894                         req.bRequest = USB_REQ_GET_STATUS;
 895                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 896                         // interface 0
 897                         len = 2;
 898                         break;
 899                 case 4:         // get device status
 900                         req.bRequest = USB_REQ_GET_STATUS;
 901                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 902                         len = 2;
 903                         break;
 904                 case 5:         // get device qualifier (MAY STALL)
 905                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
 906                         len = sizeof (struct usb_qualifier_descriptor);
 907                         if (udev->speed != USB_SPEED_HIGH)
 908                                 expected = EPIPE;
 909                         break;
 910                 case 6:         // get first config descriptor, plus interface
 911                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 912                         len = sizeof (struct usb_config_descriptor);
 913                         len += sizeof (struct usb_interface_descriptor);
 914                         break;
 915                 case 7:         // get interface descriptor (ALWAYS STALLS)
 916                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
 917                         // interface == 0
 918                         len = sizeof (struct usb_interface_descriptor);
 919                         expected = EPIPE;
 920                         break;
 921                 // NOTE: two consecutive stalls in the queue here.
 922                 // that tests fault recovery a bit more aggressively.
 923                 case 8:         // clear endpoint halt (USUALLY STALLS)
 924                         req.bRequest = USB_REQ_CLEAR_FEATURE;
 925                         req.bRequestType = USB_RECIP_ENDPOINT;
 926                         // wValue 0 == ep halt
 927                         // wIndex 0 == ep0 (shouldn't halt!)
 928                         len = 0;
 929                         pipe = usb_sndctrlpipe (udev, 0);
 930                         expected = EPIPE;
 931                         break;
 932                 case 9:         // get endpoint status
 933                         req.bRequest = USB_REQ_GET_STATUS;
 934                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
 935                         // endpoint 0
 936                         len = 2;
 937                         break;
 938                 case 10:        // trigger short read (EREMOTEIO)
 939                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 940                         len = 1024;
 941                         expected = -EREMOTEIO;
 942                         break;
 943                 // NOTE: two consecutive _different_ faults in the queue.
 944                 case 11:        // get endpoint descriptor (ALWAYS STALLS)
 945                         req.wValue = cpu_to_le16 (USB_DT_ENDPOINT << 8);
 946                         // endpoint == 0
 947                         len = sizeof (struct usb_interface_descriptor);
 948                         expected = EPIPE;
 949                         break;
 950                 // NOTE: sometimes even a third fault in the queue!
 951                 case 12:        // get string 0 descriptor (MAY STALL)
 952                         req.wValue = cpu_to_le16 (USB_DT_STRING << 8);
 953                         // string == 0, for language IDs
 954                         len = sizeof (struct usb_interface_descriptor);
 955                         // may succeed when > 4 languages
 956                         expected = EREMOTEIO;   // or EPIPE, if no strings
 957                         break;
 958                 case 13:        // short read, resembling case 10
 959                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 960                         // last data packet "should" be DATA1, not DATA0
 961                         len = 1024 - udev->descriptor.bMaxPacketSize0;
 962                         expected = -EREMOTEIO;
 963                         break;
 964                 case 14:        // short read; try to fill the last packet
 965                         req.wValue = cpu_to_le16 ((USB_DT_DEVICE << 8) | 0);
 966                         // device descriptor size == 18 bytes
 967                         len = udev->descriptor.bMaxPacketSize0;
 968                         switch (len) {
 969                         case 8:         len = 24; break;
 970                         case 16:        len = 32; break;
 971                         }
 972                         expected = -EREMOTEIO;
 973                         break;
 974                 default:
 975                         err ("bogus number of ctrl queue testcases!");
 976                         context.status = -EINVAL;
 977                         goto cleanup;
 978                 }
 979                 req.wLength = cpu_to_le16 (len);
 980                 urb [i] = u = simple_alloc_urb (udev, pipe, len);
 981                 if (!u)
 982                         goto cleanup;
 983
 984                 reqp = usb_buffer_alloc (udev, sizeof *reqp, SLAB_KERNEL,
 985                                 &u->setup_dma);
 986                 if (!reqp)
 987                         goto cleanup;
 988                 reqp->setup = req;
 989                 reqp->number = i % NUM_SUBCASES;
 990                 reqp->expected = expected;
 991                 u->setup_packet = (char *) &reqp->setup;
 992                 u->transfer_flags |= URB_NO_SETUP_DMA_MAP;
 993
 994                 u->context = &context;
 995                 u->complete = ctrl_complete;
 996         }
 997
 998         /* queue the urbs */
 999         context.urb = urb;
1000         spin_lock_irq (&context.lock);
1001         for (i = 0; i < param->sglen; i++) {
1002                 context.status = usb_submit_urb (urb [i], SLAB_ATOMIC);
1003                 if (context.status != 0) {
1004                         dbg ("can't submit urb[%d], status %d",
1005                                         i, context.status);
1006                         context.count = context.pending;
1007                         break;
1008                 }
1009                 context.pending++;
1010         }
1011         spin_unlock_irq (&context.lock);
1012
1013         /* FIXME  set timer and time out; provide a disconnect hook */
1014
1015         /* wait for the last one to complete */
1016         if (context.pending > 0)
1017                 wait_for_completion (&context.complete);
1018
1019 cleanup:
1020         for (i = 0; i < param->sglen; i++) {
1021                 if (!urb [i])
1022                         continue;
1023                 urb [i]->dev = udev;
1024                 if (urb [i]->setup_packet)
1025                         usb_buffer_free (udev, sizeof (struct usb_ctrlrequest),
1026                                         urb [i]->setup_packet,
1027                                         urb [i]->setup_dma);
1028                 simple_free_urb (urb [i]);
1029         }
1030         kfree (urb);
1031         return context.status;
1032 }
1033 #undef NUM_SUBCASES
1034
1035
1036 /*-------------------------------------------------------------------------*/
1037
1038 static void unlink1_callback (struct urb *urb, struct pt_regs *regs)
1039 {
1040         int     status = urb->status;
1041
1042         // we "know" -EPIPE (stall) never happens
1043         if (!status)
1044                 status = usb_submit_urb (urb, SLAB_ATOMIC);
1045         if (status) {
1046                 urb->status = status;
1047                 complete ((struct completion *) urb->context);
1048         }
1049 }
1050
1051 static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
1052 {
1053         struct urb              *urb;
1054         struct completion       completion;
1055         int                     retval = 0;
1056
1057         init_completion (&completion);
1058         urb = simple_alloc_urb (testdev_to_usbdev (dev), pipe, size);
1059         if (!urb)
1060                 return -ENOMEM;
1061         urb->context = &completion;
1062         urb->complete = unlink1_callback;
1063
1064         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1065          * states, and testing should get to all of them over time.
1066          *
1067          * FIXME want additional tests for when endpoint is STALLing
1068          * due to errors, or is just NAKing requests.
1069          */
1070         if ((retval = usb_submit_urb (urb, SLAB_KERNEL)) != 0) {
1071                 dev_dbg (&dev->intf->dev, "submit fail %d\n", retval);
1072                 return retval;
1073         }
1074
1075         /* unlinking that should always work.  variable delay tests more
1076          * hcd states and code paths, even with little other system load.
1077          */
1078         msleep (jiffies % (2 * INTERRUPT_RATE));
1079         if (async) {
1080 retry:
1081                 retval = usb_unlink_urb (urb);
1082                 if (retval == -EBUSY || retval == -EIDRM) {
1083                         /* we can't unlink urbs while they're completing.
1084                          * or if they've completed, and we haven't resubmitted.
1085                          * "normal" drivers would prevent resubmission, but
1086                          * since we're testing unlink paths, we can't.
1087                          */
1088                         dev_dbg (&dev->intf->dev, "unlink retry\n");
1089                         goto retry;
1090                 }
1091         } else
1092                 usb_kill_urb (urb);
1093         if (!(retval == 0 || retval == -EINPROGRESS)) {
1094                 dev_dbg (&dev->intf->dev, "unlink fail %d\n", retval);
1095                 return retval;
1096         }
1097
1098         wait_for_completion (&completion);
1099         retval = urb->status;
1100         simple_free_urb (urb);
1101
1102         if (async)
1103                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1104         else
1105                 return (retval == -ENOENT || retval == -EPERM) ?
1106                                 0 : retval - 2000;
1107 }
1108
1109 static int unlink_simple (struct usbtest_dev *dev, int pipe, int len)
1110 {
1111         int                     retval = 0;
1112
1113         /* test sync and async paths */
1114         retval = unlink1 (dev, pipe, len, 1);
1115         if (!retval)
1116                 retval = unlink1 (dev, pipe, len, 0);
1117         return retval;
1118 }
1119
1120 /*-------------------------------------------------------------------------*/
1121
1122 static int verify_not_halted (int ep, struct urb *urb)
1123 {
1124         int     retval;
1125         u16     status;
1126
1127         /* shouldn't look or act halted */
1128         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1129         if (retval < 0) {
1130                 dbg ("ep %02x couldn't get no-halt status, %d", ep, retval);
1131                 return retval;
1132         }
1133         if (status != 0) {
1134                 dbg ("ep %02x bogus status: %04x != 0", ep, status);
1135                 return -EINVAL;
1136         }
1137         retval = simple_io (urb, 1, 0, 0, __FUNCTION__);
1138         if (retval != 0)
1139                 return -EINVAL;
1140         return 0;
1141 }
1142
1143 static int verify_halted (int ep, struct urb *urb)
1144 {
1145         int     retval;
1146         u16     status;
1147
1148         /* should look and act halted */
1149         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1150         if (retval < 0) {
1151                 dbg ("ep %02x couldn't get halt status, %d", ep, retval);
1152                 return retval;
1153         }
1154         if (status != 1) {
1155                 dbg ("ep %02x bogus status: %04x != 1", ep, status);
1156                 return -EINVAL;
1157         }
1158         retval = simple_io (urb, 1, 0, -EPIPE, __FUNCTION__);
1159         if (retval != -EPIPE)
1160                 return -EINVAL;
1161         retval = simple_io (urb, 1, 0, -EPIPE, "verify_still_halted");
1162         if (retval != -EPIPE)
1163                 return -EINVAL;
1164         return 0;
1165 }
1166
1167 static int test_halt (int ep, struct urb *urb)
1168 {
1169         int     retval;
1170
1171         /* shouldn't look or act halted now */
1172         retval = verify_not_halted (ep, urb);
1173         if (retval < 0)
1174                 return retval;
1175
1176         /* set halt (protocol test only), verify it worked */
1177         retval = usb_control_msg (urb->dev, usb_sndctrlpipe (urb->dev, 0),
1178                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1179                         USB_ENDPOINT_HALT, ep,
1180                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1181         if (retval < 0) {
1182                 dbg ("ep %02x couldn't set halt, %d", ep, retval);
1183                 return retval;
1184         }
1185         retval = verify_halted (ep, urb);
1186         if (retval < 0)
1187                 return retval;
1188
1189         /* clear halt (tests API + protocol), verify it worked */
1190         retval = usb_clear_halt (urb->dev, urb->pipe);
1191         if (retval < 0) {
1192                 dbg ("ep %02x couldn't clear halt, %d", ep, retval);
1193                 return retval;
1194         }
1195         retval = verify_not_halted (ep, urb);
1196         if (retval < 0)
1197                 return retval;
1198
1199         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1200
1201         return 0;
1202 }
1203
1204 static int halt_simple (struct usbtest_dev *dev)
1205 {
1206         int             ep;
1207         int             retval = 0;
1208         struct urb      *urb;
1209
1210         urb = simple_alloc_urb (testdev_to_usbdev (dev), 0, 512);
1211         if (urb == NULL)
1212                 return -ENOMEM;
1213
1214         if (dev->in_pipe) {
1215                 ep = usb_pipeendpoint (dev->in_pipe) | USB_DIR_IN;
1216                 urb->pipe = dev->in_pipe;
1217                 retval = test_halt (ep, urb);
1218                 if (retval < 0)
1219                         goto done;
1220         }
1221
1222         if (dev->out_pipe) {
1223                 ep = usb_pipeendpoint (dev->out_pipe);
1224                 urb->pipe = dev->out_pipe;
1225                 retval = test_halt (ep, urb);
1226         }
1227 done:
1228         simple_free_urb (urb);
1229         return retval;
1230 }
1231
1232 /*-------------------------------------------------------------------------*/
1233
1234 /* Control OUT tests use the vendor control requests from Intel's
1235  * USB 2.0 compliance test device:  write a buffer, read it back.
1236  *
1237  * Intel's spec only _requires_ that it work for one packet, which
1238  * is pretty weak.   Some HCDs place limits here; most devices will
1239  * need to be able to handle more than one OUT data packet.  We'll
1240  * try whatever we're told to try.
1241  */
1242 static int ctrl_out (struct usbtest_dev *dev,
1243                 unsigned count, unsigned length, unsigned vary)
1244 {
1245         unsigned                i, j, len, retval;
1246         u8                      *buf;
1247         char                    *what = "?";
1248         struct usb_device       *udev;
1249
1250         if (length < 1 || length > 0xffff || vary >= length)
1251                 return -EINVAL;
1252
1253         buf = kmalloc(length, SLAB_KERNEL);
1254         if (!buf)
1255                 return -ENOMEM;
1256
1257         udev = testdev_to_usbdev (dev);
1258         len = length;
1259         retval = 0;
1260
1261         /* NOTE:  hardware might well act differently if we pushed it
1262          * with lots back-to-back queued requests.
1263          */
1264         for (i = 0; i < count; i++) {
1265                 /* write patterned data */
1266                 for (j = 0; j < len; j++)
1267                         buf [j] = i + j;
1268                 retval = usb_control_msg (udev, usb_sndctrlpipe (udev,0),
1269                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1270                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1271                 if (retval != len) {
1272                         what = "write";
1273                         if (retval >= 0) {
1274                                 INFO(dev, "ctrl_out, wlen %d (expected %d)\n",
1275                                                 retval, len);
1276                                 retval = -EBADMSG;
1277                         }
1278                         break;
1279                 }
1280
1281                 /* read it back -- assuming nothing intervened!!  */
1282                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev,0),
1283                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1284                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1285                 if (retval != len) {
1286                         what = "read";
1287                         if (retval >= 0) {
1288                                 INFO(dev, "ctrl_out, rlen %d (expected %d)\n",
1289                                                 retval, len);
1290                                 retval = -EBADMSG;
1291                         }
1292                         break;
1293                 }
1294
1295                 /* fail if we can't verify */
1296                 for (j = 0; j < len; j++) {
1297                         if (buf [j] != (u8) (i + j)) {
1298                                 INFO (dev, "ctrl_out, byte %d is %d not %d\n",
1299                                         j, buf [j], (u8) i + j);
1300                                 retval = -EBADMSG;
1301                                 break;
1302                         }
1303                 }
1304                 if (retval < 0) {
1305                         what = "verify";
1306                         break;
1307                 }
1308
1309                 len += vary;
1310
1311                 /* [real world] the "zero bytes IN" case isn't really used.
1312                  * hardware can easily trip up in this wierd case, since its
1313                  * status stage is IN, not OUT like other ep0in transfers.
1314                  */
1315                 if (len > length)
1316                         len = realworld ? 1 : 0;
1317         }
1318
1319         if (retval < 0)
1320                 INFO (dev, "ctrl_out %s failed, code %d, count %d\n",
1321                         what, retval, i);
1322
1323         kfree (buf);
1324         return retval;
1325 }
1326
1327 /*-------------------------------------------------------------------------*/
1328
1329 /* ISO tests ... mimics common usage
1330  *  - buffer length is split into N packets (mostly maxpacket sized)
1331  *  - multi-buffers according to sglen
1332  */
1333
1334 struct iso_context {
1335         unsigned                count;
1336         unsigned                pending;
1337         spinlock_t              lock;
1338         struct completion       done;
1339         int                     submit_error;
1340         unsigned long           errors;
1341         unsigned long           packet_count;
1342         struct usbtest_dev      *dev;
1343 };
1344
1345 static void iso_callback (struct urb *urb, struct pt_regs *regs)
1346 {
1347         struct iso_context      *ctx = urb->context;
1348
1349         spin_lock(&ctx->lock);
1350         ctx->count--;
1351
1352         ctx->packet_count += urb->number_of_packets;
1353         if (urb->error_count > 0)
1354                 ctx->errors += urb->error_count;
1355         else if (urb->status != 0)
1356                 ctx->errors += urb->number_of_packets;
1357
1358         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1359                         && !ctx->submit_error) {
1360                 int status = usb_submit_urb (urb, GFP_ATOMIC);
1361                 switch (status) {
1362                 case 0:
1363                         goto done;
1364                 default:
1365                         dev_dbg (&ctx->dev->intf->dev,
1366                                         "iso resubmit err %d\n",
1367                                         status);
1368                         /* FALLTHROUGH */
1369                 case -ENODEV:                   /* disconnected */
1370                 case -ESHUTDOWN:                /* endpoint disabled */
1371                         ctx->submit_error = 1;
1372                         break;
1373                 }
1374         }
1375         simple_free_urb (urb);
1376
1377         ctx->pending--;
1378         if (ctx->pending == 0) {
1379                 if (ctx->errors)
1380                         dev_dbg (&ctx->dev->intf->dev,
1381                                 "iso test, %lu errors out of %lu\n",
1382                                 ctx->errors, ctx->packet_count);
1383                 complete (&ctx->done);
1384         }
1385 done:
1386         spin_unlock(&ctx->lock);
1387 }
1388
1389 static struct urb *iso_alloc_urb (
1390         struct usb_device       *udev,
1391         int                     pipe,
1392         struct usb_endpoint_descriptor  *desc,
1393         long                    bytes
1394 )
1395 {
1396         struct urb              *urb;
1397         unsigned                i, maxp, packets;
1398
1399         if (bytes < 0 || !desc)
1400                 return NULL;
1401         maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
1402         maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
1403         packets = (bytes + maxp - 1) / maxp;
1404
1405         urb = usb_alloc_urb (packets, SLAB_KERNEL);
1406         if (!urb)
1407                 return urb;
1408         urb->dev = udev;
1409         urb->pipe = pipe;
1410
1411         urb->number_of_packets = packets;
1412         urb->transfer_buffer_length = bytes;
1413         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, SLAB_KERNEL,
1414                         &urb->transfer_dma);
1415         if (!urb->transfer_buffer) {
1416                 usb_free_urb (urb);
1417                 return NULL;
1418         }
1419         memset (urb->transfer_buffer, 0, bytes);
1420         for (i = 0; i < packets; i++) {
1421                 /* here, only the last packet will be short */
1422                 urb->iso_frame_desc[i].length = min ((unsigned) bytes, maxp);
1423                 bytes -= urb->iso_frame_desc[i].length;
1424
1425                 urb->iso_frame_desc[i].offset = maxp * i;
1426         }
1427
1428         urb->complete = iso_callback;
1429         // urb->context = SET BY CALLER
1430         urb->interval = 1 << (desc->bInterval - 1);
1431         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1432         return urb;
1433 }
1434
1435 static int
1436 test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
1437                 int pipe, struct usb_endpoint_descriptor *desc)
1438 {
1439         struct iso_context      context;
1440         struct usb_device       *udev;
1441         unsigned                i;
1442         unsigned long           packets = 0;
1443         int                     status = 0;
1444         struct urb              *urbs[10];      /* FIXME no limit */
1445
1446         if (param->sglen > 10)
1447                 return -EDOM;
1448
1449         memset(&context, 0, sizeof context);
1450         context.count = param->iterations * param->sglen;
1451         context.dev = dev;
1452         init_completion (&context.done);
1453         spin_lock_init (&context.lock);
1454
1455         memset (urbs, 0, sizeof urbs);
1456         udev = testdev_to_usbdev (dev);
1457         dev_dbg (&dev->intf->dev,
1458                 "... iso period %d %sframes, wMaxPacket %04x\n",
1459                 1 << (desc->bInterval - 1),
1460                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1461                 le16_to_cpu(desc->wMaxPacketSize));
1462
1463         for (i = 0; i < param->sglen; i++) {
1464                 urbs [i] = iso_alloc_urb (udev, pipe, desc,
1465                                 param->length);
1466                 if (!urbs [i]) {
1467                         status = -ENOMEM;
1468                         goto fail;
1469                 }
1470                 packets += urbs[i]->number_of_packets;
1471                 urbs [i]->context = &context;
1472         }
1473         packets *= param->iterations;
1474         dev_dbg (&dev->intf->dev,
1475                 "... total %lu msec (%lu packets)\n",
1476                 (packets * (1 << (desc->bInterval - 1)))
1477                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1478                 packets);
1479
1480         spin_lock_irq (&context.lock);
1481         for (i = 0; i < param->sglen; i++) {
1482                 ++context.pending;
1483                 status = usb_submit_urb (urbs [i], SLAB_ATOMIC);
1484                 if (status < 0) {
1485                         ERROR (dev, "submit iso[%d], error %d\n", i, status);
1486                         if (i == 0) {
1487                                 spin_unlock_irq (&context.lock);
1488                                 goto fail;
1489                         }
1490
1491                         simple_free_urb (urbs [i]);
1492                         context.pending--;
1493                         context.submit_error = 1;
1494                         break;
1495                 }
1496         }
1497         spin_unlock_irq (&context.lock);
1498
1499         wait_for_completion (&context.done);
1500
1501         /*
1502          * Isochronous transfers are expected to fail sometimes.  As an
1503          * arbitrary limit, we will report an error if any submissions
1504          * fail or if the transfer failure rate is > 10%.
1505          */
1506         if (status != 0)
1507                 ;
1508         else if (context.submit_error)
1509                 status = -EACCES;
1510         else if (context.errors > context.packet_count / 10)
1511                 status = -EIO;
1512         return status;
1513
1514 fail:
1515         for (i = 0; i < param->sglen; i++) {
1516                 if (urbs [i])
1517                         simple_free_urb (urbs [i]);
1518         }
1519         return status;
1520 }
1521
1522 /*-------------------------------------------------------------------------*/
1523
1524 /* We only have this one interface to user space, through usbfs.
1525  * User mode code can scan usbfs to find N different devices (maybe on
1526  * different busses) to use when testing, and allocate one thread per
1527  * test.  So discovery is simplified, and we have no device naming issues.
1528  *
1529  * Don't use these only as stress/load tests.  Use them along with with
1530  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1531  * video capture, and so on.  Run different tests at different times, in
1532  * different sequences.  Nothing here should interact with other devices,
1533  * except indirectly by consuming USB bandwidth and CPU resources for test
1534  * threads and request completion.  But the only way to know that for sure
1535  * is to test when HC queues are in use by many devices.
1536  */
1537
1538 static int
1539 usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
1540 {
1541         struct usbtest_dev      *dev = usb_get_intfdata (intf);
1542         struct usb_device       *udev = testdev_to_usbdev (dev);
1543         struct usbtest_param    *param = buf;
1544         int                     retval = -EOPNOTSUPP;
1545         struct urb              *urb;
1546         struct scatterlist      *sg;
1547         struct usb_sg_request   req;
1548         struct timeval          start;
1549         unsigned                i;
1550
1551         // FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is.
1552
1553         if (code != USBTEST_REQUEST)
1554                 return -EOPNOTSUPP;
1555
1556         if (param->iterations <= 0 || param->length < 0
1557                         || param->sglen < 0 || param->vary < 0)
1558                 return -EINVAL;
1559
1560         if (down_interruptible (&dev->sem))
1561                 return -ERESTARTSYS;
1562
1563         if (intf->dev.power.power_state.event != PM_EVENT_ON) {
1564                 up (&dev->sem);
1565                 return -EHOSTUNREACH;
1566         }
1567
1568         /* some devices, like ez-usb default devices, need a non-default
1569          * altsetting to have any active endpoints.  some tests change
1570          * altsettings; force a default so most tests don't need to check.
1571          */
1572         if (dev->info->alt >= 0) {
1573                 int     res;
1574
1575                 if (intf->altsetting->desc.bInterfaceNumber) {
1576                         up (&dev->sem);
1577                         return -ENODEV;
1578                 }
1579                 res = set_altsetting (dev, dev->info->alt);
1580                 if (res) {
1581                         dev_err (&intf->dev,
1582                                         "set altsetting to %d failed, %d\n",
1583                                         dev->info->alt, res);
1584                         up (&dev->sem);
1585                         return res;
1586                 }
1587         }
1588
1589         /*
1590          * Just a bunch of test cases that every HCD is expected to handle.
1591          *
1592          * Some may need specific firmware, though it'd be good to have
1593          * one firmware image to handle all the test cases.
1594          *
1595          * FIXME add more tests!  cancel requests, verify the data, control
1596          * queueing, concurrent read+write threads, and so on.
1597          */
1598         do_gettimeofday (&start);
1599         switch (param->test_num) {
1600
1601         case 0:
1602                 dev_dbg (&intf->dev, "TEST 0:  NOP\n");
1603                 retval = 0;
1604                 break;
1605
1606         /* Simple non-queued bulk I/O tests */
1607         case 1:
1608                 if (dev->out_pipe == 0)
1609                         break;
1610                 dev_dbg (&intf->dev,
1611                                 "TEST 1:  write %d bytes %u times\n",
1612                                 param->length, param->iterations);
1613                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1614                 if (!urb) {
1615                         retval = -ENOMEM;
1616                         break;
1617                 }
1618                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1619                 retval = simple_io (urb, param->iterations, 0, 0, "test1");
1620                 simple_free_urb (urb);
1621                 break;
1622         case 2:
1623                 if (dev->in_pipe == 0)
1624                         break;
1625                 dev_dbg (&intf->dev,
1626                                 "TEST 2:  read %d bytes %u times\n",
1627                                 param->length, param->iterations);
1628                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1629                 if (!urb) {
1630                         retval = -ENOMEM;
1631                         break;
1632                 }
1633                 // FIRMWARE:  bulk source (maybe generates short writes)
1634                 retval = simple_io (urb, param->iterations, 0, 0, "test2");
1635                 simple_free_urb (urb);
1636                 break;
1637         case 3:
1638                 if (dev->out_pipe == 0 || param->vary == 0)
1639                         break;
1640                 dev_dbg (&intf->dev,
1641                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
1642                                 param->vary, param->length, param->iterations);
1643                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1644                 if (!urb) {
1645                         retval = -ENOMEM;
1646                         break;
1647                 }
1648                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1649                 retval = simple_io (urb, param->iterations, param->vary,
1650                                         0, "test3");
1651                 simple_free_urb (urb);
1652                 break;
1653         case 4:
1654                 if (dev->in_pipe == 0 || param->vary == 0)
1655                         break;
1656                 dev_dbg (&intf->dev,
1657                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
1658                                 param->vary, param->length, param->iterations);
1659                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1660                 if (!urb) {
1661                         retval = -ENOMEM;
1662                         break;
1663                 }
1664                 // FIRMWARE:  bulk source (maybe generates short writes)
1665                 retval = simple_io (urb, param->iterations, param->vary,
1666                                         0, "test4");
1667                 simple_free_urb (urb);
1668                 break;
1669
1670         /* Queued bulk I/O tests */
1671         case 5:
1672                 if (dev->out_pipe == 0 || param->sglen == 0)
1673                         break;
1674                 dev_dbg (&intf->dev,
1675                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
1676                                 param->iterations,
1677                                 param->sglen, param->length);
1678                 sg = alloc_sglist (param->sglen, param->length, 0);
1679                 if (!sg) {
1680                         retval = -ENOMEM;
1681                         break;
1682                 }
1683                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1684                 retval = perform_sglist (udev, param->iterations, dev->out_pipe,
1685                                 &req, sg, param->sglen);
1686                 free_sglist (sg, param->sglen);
1687                 break;
1688
1689         case 6:
1690                 if (dev->in_pipe == 0 || param->sglen == 0)
1691                         break;
1692                 dev_dbg (&intf->dev,
1693                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
1694                                 param->iterations,
1695                                 param->sglen, param->length);
1696                 sg = alloc_sglist (param->sglen, param->length, 0);
1697                 if (!sg) {
1698                         retval = -ENOMEM;
1699                         break;
1700                 }
1701                 // FIRMWARE:  bulk source (maybe generates short writes)
1702                 retval = perform_sglist (udev, param->iterations, dev->in_pipe,
1703                                 &req, sg, param->sglen);
1704                 free_sglist (sg, param->sglen);
1705                 break;
1706         case 7:
1707                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
1708                         break;
1709                 dev_dbg (&intf->dev,
1710                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
1711                                 param->vary, param->iterations,
1712                                 param->sglen, param->length);
1713                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1714                 if (!sg) {
1715                         retval = -ENOMEM;
1716                         break;
1717                 }
1718                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1719                 retval = perform_sglist (udev, param->iterations, dev->out_pipe,
1720                                 &req, sg, param->sglen);
1721                 free_sglist (sg, param->sglen);
1722                 break;
1723         case 8:
1724                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
1725                         break;
1726                 dev_dbg (&intf->dev,
1727                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
1728                                 param->vary, param->iterations,
1729                                 param->sglen, param->length);
1730                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1731                 if (!sg) {
1732                         retval = -ENOMEM;
1733                         break;
1734                 }
1735                 // FIRMWARE:  bulk source (maybe generates short writes)
1736                 retval = perform_sglist (udev, param->iterations, dev->in_pipe,
1737                                 &req, sg, param->sglen);
1738                 free_sglist (sg, param->sglen);
1739                 break;
1740
1741         /* non-queued sanity tests for control (chapter 9 subset) */
1742         case 9:
1743                 retval = 0;
1744                 dev_dbg (&intf->dev,
1745                         "TEST 9:  ch9 (subset) control tests, %d times\n",
1746                                 param->iterations);
1747                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1748                         retval = ch9_postconfig (dev);
1749                 if (retval)
1750                         dbg ("ch9 subset failed, iterations left %d", i);
1751                 break;
1752
1753         /* queued control messaging */
1754         case 10:
1755                 if (param->sglen == 0)
1756                         break;
1757                 retval = 0;
1758                 dev_dbg (&intf->dev,
1759                                 "TEST 10:  queue %d control calls, %d times\n",
1760                                 param->sglen,
1761                                 param->iterations);
1762                 retval = test_ctrl_queue (dev, param);
1763                 break;
1764
1765         /* simple non-queued unlinks (ring with one urb) */
1766         case 11:
1767                 if (dev->in_pipe == 0 || !param->length)
1768                         break;
1769                 retval = 0;
1770                 dev_dbg (&intf->dev, "TEST 11:  unlink %d reads of %d\n",
1771                                 param->iterations, param->length);
1772                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1773                         retval = unlink_simple (dev, dev->in_pipe,
1774                                                 param->length);
1775                 if (retval)
1776                         dev_dbg (&intf->dev, "unlink reads failed %d, "
1777                                 "iterations left %d\n", retval, i);
1778                 break;
1779         case 12:
1780                 if (dev->out_pipe == 0 || !param->length)
1781                         break;
1782                 retval = 0;
1783                 dev_dbg (&intf->dev, "TEST 12:  unlink %d writes of %d\n",
1784                                 param->iterations, param->length);
1785                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1786                         retval = unlink_simple (dev, dev->out_pipe,
1787                                                 param->length);
1788                 if (retval)
1789                         dev_dbg (&intf->dev, "unlink writes failed %d, "
1790                                 "iterations left %d\n", retval, i);
1791                 break;
1792
1793         /* ep halt tests */
1794         case 13:
1795                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
1796                         break;
1797                 retval = 0;
1798                 dev_dbg (&intf->dev, "TEST 13:  set/clear %d halts\n",
1799                                 param->iterations);
1800                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1801                         retval = halt_simple (dev);
1802
1803                 if (retval)
1804                         DBG (dev, "halts failed, iterations left %d\n", i);
1805                 break;
1806
1807         /* control write tests */
1808         case 14:
1809                 if (!dev->info->ctrl_out)
1810                         break;
1811                 dev_dbg (&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
1812                                 param->iterations,
1813                                 realworld ? 1 : 0, param->length,
1814                                 param->vary);
1815                 retval = ctrl_out (dev, param->iterations,
1816                                 param->length, param->vary);
1817                 break;
1818
1819         /* iso write tests */
1820         case 15:
1821                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
1822                         break;
1823                 dev_dbg (&intf->dev,
1824                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
1825                                 param->iterations,
1826                                 param->sglen, param->length);
1827                 // FIRMWARE:  iso sink
1828                 retval = test_iso_queue (dev, param,
1829                                 dev->out_iso_pipe, dev->iso_out);
1830                 break;
1831
1832         /* iso read tests */
1833         case 16:
1834                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
1835                         break;
1836                 dev_dbg (&intf->dev,
1837                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
1838                                 param->iterations,
1839                                 param->sglen, param->length);
1840                 // FIRMWARE:  iso source
1841                 retval = test_iso_queue (dev, param,
1842                                 dev->in_iso_pipe, dev->iso_in);
1843                 break;
1844
1845         // FIXME unlink from queue (ring with N urbs)
1846
1847         // FIXME scatterlist cancel (needs helper thread)
1848
1849         }
1850         do_gettimeofday (&param->duration);
1851         param->duration.tv_sec -= start.tv_sec;
1852         param->duration.tv_usec -= start.tv_usec;
1853         if (param->duration.tv_usec < 0) {
1854                 param->duration.tv_usec += 1000 * 1000;
1855                 param->duration.tv_sec -= 1;
1856         }
1857         up (&dev->sem);
1858         return retval;
1859 }
1860
1861 /*-------------------------------------------------------------------------*/
1862
1863 static unsigned force_interrupt = 0;
1864 module_param (force_interrupt, uint, 0);
1865 MODULE_PARM_DESC (force_interrupt, "0 = test default; else interrupt");
1866
1867 #ifdef  GENERIC
1868 static unsigned short vendor;
1869 module_param(vendor, ushort, 0);
1870 MODULE_PARM_DESC (vendor, "vendor code (from usb-if)");
1871
1872 static unsigned short product;
1873 module_param(product, ushort, 0);
1874 MODULE_PARM_DESC (product, "product code (from vendor)");
1875 #endif
1876
1877 static int
1878 usbtest_probe (struct usb_interface *intf, const struct usb_device_id *id)
1879 {
1880         struct usb_device       *udev;
1881         struct usbtest_dev      *dev;
1882         struct usbtest_info     *info;
1883         char                    *rtest, *wtest;
1884         char                    *irtest, *iwtest;
1885
1886         udev = interface_to_usbdev (intf);
1887
1888 #ifdef  GENERIC
1889         /* specify devices by module parameters? */
1890         if (id->match_flags == 0) {
1891                 /* vendor match required, product match optional */
1892                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
1893                         return -ENODEV;
1894                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
1895                         return -ENODEV;
1896                 dbg ("matched module params, vend=0x%04x prod=0x%04x",
1897                                 le16_to_cpu(udev->descriptor.idVendor),
1898                                 le16_to_cpu(udev->descriptor.idProduct));
1899         }
1900 #endif
1901
1902         dev = kzalloc(sizeof(*dev), SLAB_KERNEL);
1903         if (!dev)
1904                 return -ENOMEM;
1905         info = (struct usbtest_info *) id->driver_info;
1906         dev->info = info;
1907         init_MUTEX (&dev->sem);
1908
1909         dev->intf = intf;
1910
1911         /* cacheline-aligned scratch for i/o */
1912         if ((dev->buf = kmalloc (TBUF_SIZE, SLAB_KERNEL)) == NULL) {
1913                 kfree (dev);
1914                 return -ENOMEM;
1915         }
1916
1917         /* NOTE this doesn't yet test the handful of difference that are
1918          * visible with high speed interrupts:  bigger maxpacket (1K) and
1919          * "high bandwidth" modes (up to 3 packets/uframe).
1920          */
1921         rtest = wtest = "";
1922         irtest = iwtest = "";
1923         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
1924                 if (info->ep_in) {
1925                         dev->in_pipe = usb_rcvintpipe (udev, info->ep_in);
1926                         rtest = " intr-in";
1927                 }
1928                 if (info->ep_out) {
1929                         dev->out_pipe = usb_sndintpipe (udev, info->ep_out);
1930                         wtest = " intr-out";
1931                 }
1932         } else {
1933                 if (info->autoconf) {
1934                         int status;
1935
1936                         status = get_endpoints (dev, intf);
1937                         if (status < 0) {
1938                                 dbg ("couldn't get endpoints, %d\n", status);
1939                                 return status;
1940                         }
1941                         /* may find bulk or ISO pipes */
1942                 } else {
1943                         if (info->ep_in)
1944                                 dev->in_pipe = usb_rcvbulkpipe (udev,
1945                                                         info->ep_in);
1946                         if (info->ep_out)
1947                                 dev->out_pipe = usb_sndbulkpipe (udev,
1948                                                         info->ep_out);
1949                 }
1950                 if (dev->in_pipe)
1951                         rtest = " bulk-in";
1952                 if (dev->out_pipe)
1953                         wtest = " bulk-out";
1954                 if (dev->in_iso_pipe)
1955                         irtest = " iso-in";
1956                 if (dev->out_iso_pipe)
1957                         iwtest = " iso-out";
1958         }
1959
1960         usb_set_intfdata (intf, dev);
1961         dev_info (&intf->dev, "%s\n", info->name);
1962         dev_info (&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
1963                         ({ char *tmp;
1964                         switch (udev->speed) {
1965                         case USB_SPEED_LOW: tmp = "low"; break;
1966                         case USB_SPEED_FULL: tmp = "full"; break;
1967                         case USB_SPEED_HIGH: tmp = "high"; break;
1968                         default: tmp = "unknown"; break;
1969                         }; tmp; }),
1970                         info->ctrl_out ? " in/out" : "",
1971                         rtest, wtest,
1972                         irtest, iwtest,
1973                         info->alt >= 0 ? " (+alt)" : "");
1974         return 0;
1975 }
1976
1977 static int usbtest_suspend (struct usb_interface *intf, pm_message_t message)
1978 {
1979         return 0;
1980 }
1981
1982 static int usbtest_resume (struct usb_interface *intf)
1983 {
1984         return 0;
1985 }
1986
1987
1988 static void usbtest_disconnect (struct usb_interface *intf)
1989 {
1990         struct usbtest_dev      *dev = usb_get_intfdata (intf);
1991
1992         down (&dev->sem);
1993
1994         usb_set_intfdata (intf, NULL);
1995         dev_dbg (&intf->dev, "disconnect\n");
1996         kfree (dev);
1997 }
1998
1999 /* Basic testing only needs a device that can source or sink bulk traffic.
2000  * Any device can test control transfers (default with GENERIC binding).
2001  *
2002  * Several entries work with the default EP0 implementation that's built
2003  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2004  * by (very) small config EEPROMS, but otherwise all these devices act
2005  * identically until firmware is loaded:  only EP0 works.  It turns out
2006  * to be easy to make other endpoints work, without modifying that EP0
2007  * behavior.  For now, we expect that kind of firmware.
2008  */
2009
2010 /* an21xx or fx versions of ez-usb */
2011 static struct usbtest_info ez1_info = {
2012         .name           = "EZ-USB device",
2013         .ep_in          = 2,
2014         .ep_out         = 2,
2015         .alt            = 1,
2016 };
2017
2018 /* fx2 version of ez-usb */
2019 static struct usbtest_info ez2_info = {
2020         .name           = "FX2 device",
2021         .ep_in          = 6,
2022         .ep_out         = 2,
2023         .alt            = 1,
2024 };
2025
2026 /* ezusb family device with dedicated usb test firmware,
2027  */
2028 static struct usbtest_info fw_info = {
2029         .name           = "usb test device",
2030         .ep_in          = 2,
2031         .ep_out         = 2,
2032         .alt            = 1,
2033         .autoconf       = 1,            // iso and ctrl_out need autoconf
2034         .ctrl_out       = 1,
2035         .iso            = 1,            // iso_ep's are #8 in/out
2036 };
2037
2038 /* peripheral running Linux and 'zero.c' test firmware, or
2039  * its user-mode cousin. different versions of this use
2040  * different hardware with the same vendor/product codes.
2041  * host side MUST rely on the endpoint descriptors.
2042  */
2043 static struct usbtest_info gz_info = {
2044         .name           = "Linux gadget zero",
2045         .autoconf       = 1,
2046         .ctrl_out       = 1,
2047         .alt            = 0,
2048 };
2049
2050 static struct usbtest_info um_info = {
2051         .name           = "Linux user mode test driver",
2052         .autoconf       = 1,
2053         .alt            = -1,
2054 };
2055
2056 static struct usbtest_info um2_info = {
2057         .name           = "Linux user mode ISO test driver",
2058         .autoconf       = 1,
2059         .iso            = 1,
2060         .alt            = -1,
2061 };
2062
2063 #ifdef IBOT2
2064 /* this is a nice source of high speed bulk data;
2065  * uses an FX2, with firmware provided in the device
2066  */
2067 static struct usbtest_info ibot2_info = {
2068         .name           = "iBOT2 webcam",
2069         .ep_in          = 2,
2070         .alt            = -1,
2071 };
2072 #endif
2073
2074 #ifdef GENERIC
2075 /* we can use any device to test control traffic */
2076 static struct usbtest_info generic_info = {
2077         .name           = "Generic USB device",
2078         .alt            = -1,
2079 };
2080 #endif
2081
2082 // FIXME remove this
2083 static struct usbtest_info hact_info = {
2084         .name           = "FX2/hact",
2085         //.ep_in                = 6,
2086         .ep_out         = 2,
2087         .alt            = -1,
2088 };
2089
2090
2091 static struct usb_device_id id_table [] = {
2092
2093         { USB_DEVICE (0x0547, 0x1002),
2094                 .driver_info = (unsigned long) &hact_info,
2095                 },
2096
2097         /*-------------------------------------------------------------*/
2098
2099         /* EZ-USB devices which download firmware to replace (or in our
2100          * case augment) the default device implementation.
2101          */
2102
2103         /* generic EZ-USB FX controller */
2104         { USB_DEVICE (0x0547, 0x2235),
2105                 .driver_info = (unsigned long) &ez1_info,
2106                 },
2107
2108         /* CY3671 development board with EZ-USB FX */
2109         { USB_DEVICE (0x0547, 0x0080),
2110                 .driver_info = (unsigned long) &ez1_info,
2111                 },
2112
2113         /* generic EZ-USB FX2 controller (or development board) */
2114         { USB_DEVICE (0x04b4, 0x8613),
2115                 .driver_info = (unsigned long) &ez2_info,
2116                 },
2117
2118         /* re-enumerated usb test device firmware */
2119         { USB_DEVICE (0xfff0, 0xfff0),
2120                 .driver_info = (unsigned long) &fw_info,
2121                 },
2122
2123         /* "Gadget Zero" firmware runs under Linux */
2124         { USB_DEVICE (0x0525, 0xa4a0),
2125                 .driver_info = (unsigned long) &gz_info,
2126                 },
2127
2128         /* so does a user-mode variant */
2129         { USB_DEVICE (0x0525, 0xa4a4),
2130                 .driver_info = (unsigned long) &um_info,
2131                 },
2132
2133         /* ... and a user-mode variant that talks iso */
2134         { USB_DEVICE (0x0525, 0xa4a3),
2135                 .driver_info = (unsigned long) &um2_info,
2136                 },
2137
2138 #ifdef KEYSPAN_19Qi
2139         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2140         // this does not coexist with the real Keyspan 19qi driver!
2141         { USB_DEVICE (0x06cd, 0x010b),
2142                 .driver_info = (unsigned long) &ez1_info,
2143                 },
2144 #endif
2145
2146         /*-------------------------------------------------------------*/
2147
2148 #ifdef IBOT2
2149         /* iBOT2 makes a nice source of high speed bulk-in data */
2150         // this does not coexist with a real iBOT2 driver!
2151         { USB_DEVICE (0x0b62, 0x0059),
2152                 .driver_info = (unsigned long) &ibot2_info,
2153                 },
2154 #endif
2155
2156         /*-------------------------------------------------------------*/
2157
2158 #ifdef GENERIC
2159         /* module params can specify devices to use for control tests */
2160         { .driver_info = (unsigned long) &generic_info, },
2161 #endif
2162
2163         /*-------------------------------------------------------------*/
2164
2165         { }
2166 };
2167 MODULE_DEVICE_TABLE (usb, id_table);
2168
2169 static struct usb_driver usbtest_driver = {
2170         .name =         "usbtest",
2171         .id_table =     id_table,
2172         .probe =        usbtest_probe,
2173         .ioctl =        usbtest_ioctl,
2174         .disconnect =   usbtest_disconnect,
2175         .suspend =      usbtest_suspend,
2176         .resume =       usbtest_resume,
2177 };
2178
2179 /*-------------------------------------------------------------------------*/
2180
2181 static int __init usbtest_init (void)
2182 {
2183 #ifdef GENERIC
2184         if (vendor)
2185                 dbg ("params: vend=0x%04x prod=0x%04x", vendor, product);
2186 #endif
2187         return usb_register (&usbtest_driver);
2188 }
2189 module_init (usbtest_init);
2190
2191 static void __exit usbtest_exit (void)
2192 {
2193         usb_deregister (&usbtest_driver);
2194 }
2195 module_exit (usbtest_exit);
2196
2197 MODULE_DESCRIPTION ("USB Core/HCD Testing Driver");
2198 MODULE_LICENSE ("GPL");
2199