drivers/usb/misc/usbtest.c

   1 #include <linux/kernel.h>
   2 #include <linux/errno.h>
   3 #include <linux/init.h>
   4 #include <linux/slab.h>
   5 #include <linux/mm.h>
   6 #include <linux/module.h>
   7 #include <linux/moduleparam.h>
   8 #include <linux/scatterlist.h>
   9 #include <linux/mutex.h>
  10
  11 #include <linux/usb.h>
  12
  13
  14 /*-------------------------------------------------------------------------*/
  15
  16 // FIXME make these public somewhere; usbdevfs.h?
  17 //
  18 struct usbtest_param {
  19         // inputs
  20         unsigned                test_num;       /* 0..(TEST_CASES-1) */
  21         unsigned                iterations;
  22         unsigned                length;
  23         unsigned                vary;
  24         unsigned                sglen;
  25
  26         // outputs
  27         struct timeval          duration;
  28 };
  29 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
  30
  31 /*-------------------------------------------------------------------------*/
  32
  33 #define GENERIC         /* let probe() bind using module params */
  34
  35 /* Some devices that can be used for testing will have "real" drivers.
  36  * Entries for those need to be enabled here by hand, after disabling
  37  * that "real" driver.
  38  */
  39 //#define       IBOT2           /* grab iBOT2 webcams */
  40 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
  41
  42 /*-------------------------------------------------------------------------*/
  43
  44 struct usbtest_info {
  45         const char              *name;
  46         u8                      ep_in;          /* bulk/intr source */
  47         u8                      ep_out;         /* bulk/intr sink */
  48         unsigned                autoconf : 1;
  49         unsigned                ctrl_out : 1;
  50         unsigned                iso : 1;        /* try iso in/out */
  51         int                     alt;
  52 };
  53
  54 /* this is accessed only through usbfs ioctl calls.
  55  * one ioctl to issue a test ... one lock per device.
  56  * tests create other threads if they need them.
  57  * urbs and buffers are allocated dynamically,
  58  * and data generated deterministically.
  59  */
  60 struct usbtest_dev {
  61         struct usb_interface    *intf;
  62         struct usbtest_info     *info;
  63         int                     in_pipe;
  64         int                     out_pipe;
  65         int                     in_iso_pipe;
  66         int                     out_iso_pipe;
  67         struct usb_endpoint_descriptor  *iso_in, *iso_out;
  68         struct mutex            lock;
  69
  70 #define TBUF_SIZE       256
  71         u8                      *buf;
  72 };
  73
  74 static struct usb_device *testdev_to_usbdev (struct usbtest_dev *test)
  75 {
  76         return interface_to_usbdev (test->intf);
  77 }
  78
  79 /* set up all urbs so they can be used with either bulk or interrupt */
  80 #define INTERRUPT_RATE          1       /* msec/transfer */
  81
  82 #define ERROR(tdev, fmt, args...) \
  83         dev_err(&(tdev)->intf->dev , fmt , ## args)
  84 #define WARNING(tdev, fmt, args...) \
  85         dev_warn(&(tdev)->intf->dev , fmt , ## args)
  86
  87 /*-------------------------------------------------------------------------*/
  88
  89 static int
  90 get_endpoints (struct usbtest_dev *dev, struct usb_interface *intf)
  91 {
  92         int                             tmp;
  93         struct usb_host_interface       *alt;
  94         struct usb_host_endpoint        *in, *out;
  95         struct usb_host_endpoint        *iso_in, *iso_out;
  96         struct usb_device               *udev;
  97
  98         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
  99                 unsigned        ep;
 100
 101                 in = out = NULL;
 102                 iso_in = iso_out = NULL;
 103                 alt = intf->altsetting + tmp;
 104
 105                 /* take the first altsetting with in-bulk + out-bulk;
 106                  * ignore other endpoints and altsetttings.
 107                  */
 108                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
 109                         struct usb_host_endpoint        *e;
 110
 111                         e = alt->endpoint + ep;
 112                         switch (e->desc.bmAttributes) {
 113                         case USB_ENDPOINT_XFER_BULK:
 114                                 break;
 115                         case USB_ENDPOINT_XFER_ISOC:
 116                                 if (dev->info->iso)
 117                                         goto try_iso;
 118                                 // FALLTHROUGH
 119                         default:
 120                                 continue;
 121                         }
 122                         if (usb_endpoint_dir_in(&e->desc)) {
 123                                 if (!in)
 124                                         in = e;
 125                         } else {
 126                                 if (!out)
 127                                         out = e;
 128                         }
 129                         continue;
 130 try_iso:
 131                         if (usb_endpoint_dir_in(&e->desc)) {
 132                                 if (!iso_in)
 133                                         iso_in = e;
 134                         } else {
 135                                 if (!iso_out)
 136                                         iso_out = e;
 137                         }
 138                 }
 139                 if ((in && out)  ||  (iso_in && iso_out))
 140                         goto found;
 141         }
 142         return -EINVAL;
 143
 144 found:
 145         udev = testdev_to_usbdev (dev);
 146         if (alt->desc.bAlternateSetting != 0) {
 147                 tmp = usb_set_interface (udev,
 148                                 alt->desc.bInterfaceNumber,
 149                                 alt->desc.bAlternateSetting);
 150                 if (tmp < 0)
 151                         return tmp;
 152         }
 153
 154         if (in) {
 155                 dev->in_pipe = usb_rcvbulkpipe (udev,
 156                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 157                 dev->out_pipe = usb_sndbulkpipe (udev,
 158                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 159         }
 160         if (iso_in) {
 161                 dev->iso_in = &iso_in->desc;
 162                 dev->in_iso_pipe = usb_rcvisocpipe (udev,
 163                                 iso_in->desc.bEndpointAddress
 164                                         & USB_ENDPOINT_NUMBER_MASK);
 165                 dev->iso_out = &iso_out->desc;
 166                 dev->out_iso_pipe = usb_sndisocpipe (udev,
 167                                 iso_out->desc.bEndpointAddress
 168                                         & USB_ENDPOINT_NUMBER_MASK);
 169         }
 170         return 0;
 171 }
 172
 173 /*-------------------------------------------------------------------------*/
 174
 175 /* Support for testing basic non-queued I/O streams.
 176  *
 177  * These just package urbs as requests that can be easily canceled.
 178  * Each urb's data buffer is dynamically allocated; callers can fill
 179  * them with non-zero test data (or test for it) when appropriate.
 180  */
 181
 182 static void simple_callback (struct urb *urb)
 183 {
 184         complete(urb->context);
 185 }
 186
 187 static struct urb *simple_alloc_urb (
 188         struct usb_device       *udev,
 189         int                     pipe,
 190         unsigned long           bytes
 191 )
 192 {
 193         struct urb              *urb;
 194
 195         if (bytes < 0)
 196                 return NULL;
 197         urb = usb_alloc_urb (0, GFP_KERNEL);
 198         if (!urb)
 199                 return urb;
 200         usb_fill_bulk_urb (urb, udev, pipe, NULL, bytes, simple_callback, NULL);
 201         urb->interval = (udev->speed == USB_SPEED_HIGH)
 202                         ? (INTERRUPT_RATE << 3)
 203                         : INTERRUPT_RATE;
 204         urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
 205         if (usb_pipein (pipe))
 206                 urb->transfer_flags |= URB_SHORT_NOT_OK;
 207         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, GFP_KERNEL,
 208                         &urb->transfer_dma);
 209         if (!urb->transfer_buffer) {
 210                 usb_free_urb (urb);
 211                 urb = NULL;
 212         } else
 213                 memset (urb->transfer_buffer, 0, bytes);
 214         return urb;
 215 }
 216
 217 static unsigned pattern = 0;
 218 module_param (pattern, uint, S_IRUGO);
 219 MODULE_PARM_DESC(pattern, "i/o pattern (0 == zeroes)");
 220
 221 static inline void simple_fill_buf (struct urb *urb)
 222 {
 223         unsigned        i;
 224         u8              *buf = urb->transfer_buffer;
 225         unsigned        len = urb->transfer_buffer_length;
 226
 227         switch (pattern) {
 228         default:
 229                 // FALLTHROUGH
 230         case 0:
 231                 memset (buf, 0, len);
 232                 break;
 233         case 1:                 /* mod63 */
 234                 for (i = 0; i < len; i++)
 235                         *buf++ = (u8) (i % 63);
 236                 break;
 237         }
 238 }
 239
 240 static inline int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb)
 241 {
 242         unsigned        i;
 243         u8              expected;
 244         u8              *buf = urb->transfer_buffer;
 245         unsigned        len = urb->actual_length;
 246
 247         for (i = 0; i < len; i++, buf++) {
 248                 switch (pattern) {
 249                 /* all-zeroes has no synchronization issues */
 250                 case 0:
 251                         expected = 0;
 252                         break;
 253                 /* mod63 stays in sync with short-terminated transfers,
 254                  * or otherwise when host and gadget agree on how large
 255                  * each usb transfer request should be.  resync is done
 256                  * with set_interface or set_config.
 257                  */
 258                 case 1:                 /* mod63 */
 259                         expected = i % 63;
 260                         break;
 261                 /* always fail unsupported patterns */
 262                 default:
 263                         expected = !*buf;
 264                         break;
 265                 }
 266                 if (*buf == expected)
 267                         continue;
 268                 ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
 269                 return -EINVAL;
 270         }
 271         return 0;
 272 }
 273
 274 static void simple_free_urb (struct urb *urb)
 275 {
 276         usb_buffer_free (urb->dev, urb->transfer_buffer_length,
 277                         urb->transfer_buffer, urb->transfer_dma);
 278         usb_free_urb (urb);
 279 }
 280
 281 static int simple_io (
 282         struct usbtest_dev      *tdev,
 283         struct urb              *urb,
 284         int                     iterations,
 285         int                     vary,
 286         int                     expected,
 287         const char              *label
 288 )
 289 {
 290         struct usb_device       *udev = urb->dev;
 291         int                     max = urb->transfer_buffer_length;
 292         struct completion       completion;
 293         int                     retval = 0;
 294
 295         urb->context = &completion;
 296         while (retval == 0 && iterations-- > 0) {
 297                 init_completion (&completion);
 298                 if (usb_pipeout (urb->pipe))
 299                         simple_fill_buf (urb);
 300                 if ((retval = usb_submit_urb (urb, GFP_KERNEL)) != 0)
 301                         break;
 302
 303                 /* NOTE:  no timeouts; can't be broken out of by interrupt */
 304                 wait_for_completion (&completion);
 305                 retval = urb->status;
 306                 urb->dev = udev;
 307                 if (retval == 0 && usb_pipein (urb->pipe))
 308                         retval = simple_check_buf(tdev, urb);
 309
 310                 if (vary) {
 311                         int     len = urb->transfer_buffer_length;
 312
 313                         len += vary;
 314                         len %= max;
 315                         if (len == 0)
 316                                 len = (vary < max) ? vary : max;
 317                         urb->transfer_buffer_length = len;
 318                 }
 319
 320                 /* FIXME if endpoint halted, clear halt (and log) */
 321         }
 322         urb->transfer_buffer_length = max;
 323
 324         if (expected != retval)
 325                 dev_err(&udev->dev,
 326                         "%s failed, iterations left %d, status %d (not %d)\n",
 327                                 label, iterations, retval, expected);
 328         return retval;
 329 }
 330
 331
 332 /*-------------------------------------------------------------------------*/
 333
 334 /* We use scatterlist primitives to test queued I/O.
 335  * Yes, this also tests the scatterlist primitives.
 336  */
 337
 338 static void free_sglist (struct scatterlist *sg, int nents)
 339 {
 340         unsigned                i;
 341
 342         if (!sg)
 343                 return;
 344         for (i = 0; i < nents; i++) {
 345                 if (!sg_page(&sg[i]))
 346                         continue;
 347                 kfree (sg_virt(&sg[i]));
 348         }
 349         kfree (sg);
 350 }
 351
 352 static struct scatterlist *
 353 alloc_sglist (int nents, int max, int vary)
 354 {
 355         struct scatterlist      *sg;
 356         unsigned                i;
 357         unsigned                size = max;
 358
 359         sg = kmalloc (nents * sizeof *sg, GFP_KERNEL);
 360         if (!sg)
 361                 return NULL;
 362         sg_init_table(sg, nents);
 363
 364         for (i = 0; i < nents; i++) {
 365                 char            *buf;
 366                 unsigned        j;
 367
 368                 buf = kzalloc (size, GFP_KERNEL);
 369                 if (!buf) {
 370                         free_sglist (sg, i);
 371                         return NULL;
 372                 }
 373
 374                 /* kmalloc pages are always physically contiguous! */
 375                 sg_set_buf(&sg[i], buf, size);
 376
 377                 switch (pattern) {
 378                 case 0:
 379                         /* already zeroed */
 380                         break;
 381                 case 1:
 382                         for (j = 0; j < size; j++)
 383                                 *buf++ = (u8) (j % 63);
 384                         break;
 385                 }
 386
 387                 if (vary) {
 388                         size += vary;
 389                         size %= max;
 390                         if (size == 0)
 391                                 size = (vary < max) ? vary : max;
 392                 }
 393         }
 394
 395         return sg;
 396 }
 397
 398 static int perform_sglist (
 399         struct usbtest_dev      *tdev,
 400         unsigned                iterations,
 401         int                     pipe,
 402         struct usb_sg_request   *req,
 403         struct scatterlist      *sg,
 404         int                     nents
 405 )
 406 {
 407         struct usb_device       *udev = testdev_to_usbdev(tdev);
 408         int                     retval = 0;
 409
 410         while (retval == 0 && iterations-- > 0) {
 411                 retval = usb_sg_init (req, udev, pipe,
 412                                 (udev->speed == USB_SPEED_HIGH)
 413                                         ? (INTERRUPT_RATE << 3)
 414                                         : INTERRUPT_RATE,
 415                                 sg, nents, 0, GFP_KERNEL);
 416
 417                 if (retval)
 418                         break;
 419                 usb_sg_wait (req);
 420                 retval = req->status;
 421
 422                 /* FIXME check resulting data pattern */
 423
 424                 /* FIXME if endpoint halted, clear halt (and log) */
 425         }
 426
 427         // FIXME for unlink or fault handling tests, don't report
 428         // failure if retval is as we expected ...
 429
 430         if (retval)
 431                 ERROR(tdev, "perform_sglist failed, "
 432                                 "iterations left %d, status %d\n",
 433                                 iterations, retval);
 434         return retval;
 435 }
 436
 437
 438 /*-------------------------------------------------------------------------*/
 439
 440 /* unqueued control message testing
 441  *
 442  * there's a nice set of device functional requirements in chapter 9 of the
 443  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
 444  * special test firmware.
 445  *
 446  * we know the device is configured (or suspended) by the time it's visible
 447  * through usbfs.  we can't change that, so we won't test enumeration (which
 448  * worked 'well enough' to get here, this time), power management (ditto),
 449  * or remote wakeup (which needs human interaction).
 450  */
 451
 452 static unsigned realworld = 1;
 453 module_param (realworld, uint, 0);
 454 MODULE_PARM_DESC (realworld, "clear to demand stricter spec compliance");
 455
 456 static int get_altsetting (struct usbtest_dev *dev)
 457 {
 458         struct usb_interface    *iface = dev->intf;
 459         struct usb_device       *udev = interface_to_usbdev (iface);
 460         int                     retval;
 461
 462         retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 463                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
 464                         0, iface->altsetting [0].desc.bInterfaceNumber,
 465                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 466         switch (retval) {
 467         case 1:
 468                 return dev->buf [0];
 469         case 0:
 470                 retval = -ERANGE;
 471                 // FALLTHROUGH
 472         default:
 473                 return retval;
 474         }
 475 }
 476
 477 static int set_altsetting (struct usbtest_dev *dev, int alternate)
 478 {
 479         struct usb_interface            *iface = dev->intf;
 480         struct usb_device               *udev;
 481
 482         if (alternate < 0 || alternate >= 256)
 483                 return -EINVAL;
 484
 485         udev = interface_to_usbdev (iface);
 486         return usb_set_interface (udev,
 487                         iface->altsetting [0].desc.bInterfaceNumber,
 488                         alternate);
 489 }
 490
 491 static int is_good_config(struct usbtest_dev *tdev, int len)
 492 {
 493         struct usb_config_descriptor    *config;
 494
 495         if (len < sizeof *config)
 496                 return 0;
 497         config = (struct usb_config_descriptor *) tdev->buf;
 498
 499         switch (config->bDescriptorType) {
 500         case USB_DT_CONFIG:
 501         case USB_DT_OTHER_SPEED_CONFIG:
 502                 if (config->bLength != 9) {
 503                         ERROR(tdev, "bogus config descriptor length\n");
 504                         return 0;
 505                 }
 506                 /* this bit 'must be 1' but often isn't */
 507                 if (!realworld && !(config->bmAttributes & 0x80)) {
 508                         ERROR(tdev, "high bit of config attributes not set\n");
 509                         return 0;
 510                 }
 511                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
 512                         ERROR(tdev, "reserved config bits set\n");
 513                         return 0;
 514                 }
 515                 break;
 516         default:
 517                 return 0;
 518         }
 519
 520         if (le16_to_cpu(config->wTotalLength) == len)           /* read it all */
 521                 return 1;
 522         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)             /* max partial read */
 523                 return 1;
 524         ERROR(tdev, "bogus config descriptor read size\n");
 525         return 0;
 526 }
 527
 528 /* sanity test for standard requests working with usb_control_mesg() and some
 529  * of the utility functions which use it.
 530  *
 531  * this doesn't test how endpoint halts behave or data toggles get set, since
 532  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
 533  * halt or toggle).  toggle testing is impractical without support from hcds.
 534  *
 535  * this avoids failing devices linux would normally work with, by not testing
 536  * config/altsetting operations for devices that only support their defaults.
 537  * such devices rarely support those needless operations.
 538  *
 539  * NOTE that since this is a sanity test, it's not examining boundary cases
 540  * to see if usbcore, hcd, and device all behave right.  such testing would
 541  * involve varied read sizes and other operation sequences.
 542  */
 543 static int ch9_postconfig (struct usbtest_dev *dev)
 544 {
 545         struct usb_interface    *iface = dev->intf;
 546         struct usb_device       *udev = interface_to_usbdev (iface);
 547         int                     i, alt, retval;
 548
 549         /* [9.2.3] if there's more than one altsetting, we need to be able to
 550          * set and get each one.  mostly trusts the descriptors from usbcore.
 551          */
 552         for (i = 0; i < iface->num_altsetting; i++) {
 553
 554                 /* 9.2.3 constrains the range here */
 555                 alt = iface->altsetting [i].desc.bAlternateSetting;
 556                 if (alt < 0 || alt >= iface->num_altsetting) {
 557                         dev_err(&iface->dev,
 558                                         "invalid alt [%d].bAltSetting = %d\n",
 559                                         i, alt);
 560                 }
 561
 562                 /* [real world] get/set unimplemented if there's only one */
 563                 if (realworld && iface->num_altsetting == 1)
 564                         continue;
 565
 566                 /* [9.4.10] set_interface */
 567                 retval = set_altsetting (dev, alt);
 568                 if (retval) {
 569                         dev_err(&iface->dev, "can't set_interface = %d, %d\n",
 570                                         alt, retval);
 571                         return retval;
 572                 }
 573
 574                 /* [9.4.4] get_interface always works */
 575                 retval = get_altsetting (dev);
 576                 if (retval != alt) {
 577                         dev_err(&iface->dev, "get alt should be %d, was %d\n",
 578                                         alt, retval);
 579                         return (retval < 0) ? retval : -EDOM;
 580                 }
 581
 582         }
 583
 584         /* [real world] get_config unimplemented if there's only one */
 585         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
 586                 int     expected = udev->actconfig->desc.bConfigurationValue;
 587
 588                 /* [9.4.2] get_configuration always works
 589                  * ... although some cheap devices (like one TI Hub I've got)
 590                  * won't return config descriptors except before set_config.
 591                  */
 592                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev, 0),
 593                                 USB_REQ_GET_CONFIGURATION,
 594                                 USB_DIR_IN | USB_RECIP_DEVICE,
 595                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 596                 if (retval != 1 || dev->buf [0] != expected) {
 597                         dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
 598                                 retval, dev->buf[0], expected);
 599                         return (retval < 0) ? retval : -EDOM;
 600                 }
 601         }
 602
 603         /* there's always [9.4.3] a device descriptor [9.6.1] */
 604         retval = usb_get_descriptor (udev, USB_DT_DEVICE, 0,
 605                         dev->buf, sizeof udev->descriptor);
 606         if (retval != sizeof udev->descriptor) {
 607                 dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
 608                 return (retval < 0) ? retval : -EDOM;
 609         }
 610
 611         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
 612         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
 613                 retval = usb_get_descriptor (udev, USB_DT_CONFIG, i,
 614                                 dev->buf, TBUF_SIZE);
 615                 if (!is_good_config(dev, retval)) {
 616                         dev_err(&iface->dev,
 617                                         "config [%d] descriptor --> %d\n",
 618                                         i, retval);
 619                         return (retval < 0) ? retval : -EDOM;
 620                 }
 621
 622                 // FIXME cross-checking udev->config[i] to make sure usbcore
 623                 // parsed it right (etc) would be good testing paranoia
 624         }
 625
 626         /* and sometimes [9.2.6.6] speed dependent descriptors */
 627         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
 628                 struct usb_qualifier_descriptor         *d = NULL;
 629
 630                 /* device qualifier [9.6.2] */
 631                 retval = usb_get_descriptor (udev,
 632                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
 633                                 sizeof (struct usb_qualifier_descriptor));
 634                 if (retval == -EPIPE) {
 635                         if (udev->speed == USB_SPEED_HIGH) {
 636                                 dev_err(&iface->dev,
 637                                                 "hs dev qualifier --> %d\n",
 638                                                 retval);
 639                                 return (retval < 0) ? retval : -EDOM;
 640                         }
 641                         /* usb2.0 but not high-speed capable; fine */
 642                 } else if (retval != sizeof (struct usb_qualifier_descriptor)) {
 643                         dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
 644                         return (retval < 0) ? retval : -EDOM;
 645                 } else
 646                         d = (struct usb_qualifier_descriptor *) dev->buf;
 647
 648                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
 649                 if (d) {
 650                         unsigned max = d->bNumConfigurations;
 651                         for (i = 0; i < max; i++) {
 652                                 retval = usb_get_descriptor (udev,
 653                                         USB_DT_OTHER_SPEED_CONFIG, i,
 654                                         dev->buf, TBUF_SIZE);
 655                                 if (!is_good_config(dev, retval)) {
 656                                         dev_err(&iface->dev,
 657                                                 "other speed config --> %d\n",
 658                                                 retval);
 659                                         return (retval < 0) ? retval : -EDOM;
 660                                 }
 661                         }
 662                 }
 663         }
 664         // FIXME fetch strings from at least the device descriptor
 665
 666         /* [9.4.5] get_status always works */
 667         retval = usb_get_status (udev, USB_RECIP_DEVICE, 0, dev->buf);
 668         if (retval != 2) {
 669                 dev_err(&iface->dev, "get dev status --> %d\n", retval);
 670                 return (retval < 0) ? retval : -EDOM;
 671         }
 672
 673         // FIXME configuration.bmAttributes says if we could try to set/clear
 674         // the device's remote wakeup feature ... if we can, test that here
 675
 676         retval = usb_get_status (udev, USB_RECIP_INTERFACE,
 677                         iface->altsetting [0].desc.bInterfaceNumber, dev->buf);
 678         if (retval != 2) {
 679                 dev_err(&iface->dev, "get interface status --> %d\n", retval);
 680                 return (retval < 0) ? retval : -EDOM;
 681         }
 682         // FIXME get status for each endpoint in the interface
 683
 684         return 0;
 685 }
 686
 687 /*-------------------------------------------------------------------------*/
 688
 689 /* use ch9 requests to test whether:
 690  *   (a) queues work for control, keeping N subtests queued and
 691  *       active (auto-resubmit) for M loops through the queue.
 692  *   (b) protocol stalls (control-only) will autorecover.
 693  *       it's not like bulk/intr; no halt clearing.
 694  *   (c) short control reads are reported and handled.
 695  *   (d) queues are always processed in-order
 696  */
 697
 698 struct ctrl_ctx {
 699         spinlock_t              lock;
 700         struct usbtest_dev      *dev;
 701         struct completion       complete;
 702         unsigned                count;
 703         unsigned                pending;
 704         int                     status;
 705         struct urb              **urb;
 706         struct usbtest_param    *param;
 707         int                     last;
 708 };
 709
 710 #define NUM_SUBCASES    15              /* how many test subcases here? */
 711
 712 struct subcase {
 713         struct usb_ctrlrequest  setup;
 714         int                     number;
 715         int                     expected;
 716 };
 717
 718 static void ctrl_complete (struct urb *urb)
 719 {
 720         struct ctrl_ctx         *ctx = urb->context;
 721         struct usb_ctrlrequest  *reqp;
 722         struct subcase          *subcase;
 723         int                     status = urb->status;
 724
 725         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
 726         subcase = container_of (reqp, struct subcase, setup);
 727
 728         spin_lock (&ctx->lock);
 729         ctx->count--;
 730         ctx->pending--;
 731
 732         /* queue must transfer and complete in fifo order, unless
 733          * usb_unlink_urb() is used to unlink something not at the
 734          * physical queue head (not tested).
 735          */
 736         if (subcase->number > 0) {
 737                 if ((subcase->number - ctx->last) != 1) {
 738                         ERROR(ctx->dev,
 739                                 "subcase %d completed out of order, last %d\n",
 740                                 subcase->number, ctx->last);
 741                         status = -EDOM;
 742                         ctx->last = subcase->number;
 743                         goto error;
 744                 }
 745         }
 746         ctx->last = subcase->number;
 747
 748         /* succeed or fault in only one way? */
 749         if (status == subcase->expected)
 750                 status = 0;
 751
 752         /* async unlink for cleanup? */
 753         else if (status != -ECONNRESET) {
 754
 755                 /* some faults are allowed, not required */
 756                 if (subcase->expected > 0 && (
 757                           ((status == -subcase->expected        /* happened */
 758                            || status == 0))))                   /* didn't */
 759                         status = 0;
 760                 /* sometimes more than one fault is allowed */
 761                 else if (subcase->number == 12 && status == -EPIPE)
 762                         status = 0;
 763                 else
 764                         ERROR(ctx->dev, "subtest %d error, status %d\n",
 765                                         subcase->number, status);
 766         }
 767
 768         /* unexpected status codes mean errors; ideally, in hardware */
 769         if (status) {
 770 error:
 771                 if (ctx->status == 0) {
 772                         int             i;
 773
 774                         ctx->status = status;
 775                         ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
 776                                         "%d left, subcase %d, len %d/%d\n",
 777                                         reqp->bRequestType, reqp->bRequest,
 778                                         status, ctx->count, subcase->number,
 779                                         urb->actual_length,
 780                                         urb->transfer_buffer_length);
 781
 782                         /* FIXME this "unlink everything" exit route should
 783                          * be a separate test case.
 784                          */
 785
 786                         /* unlink whatever's still pending */
 787                         for (i = 1; i < ctx->param->sglen; i++) {
 788                                 struct urb      *u = ctx->urb [
 789                                                 (i + subcase->number)
 790                                                 % ctx->param->sglen];
 791
 792                                 if (u == urb || !u->dev)
 793                                         continue;
 794                                 spin_unlock(&ctx->lock);
 795                                 status = usb_unlink_urb (u);
 796                                 spin_lock(&ctx->lock);
 797                                 switch (status) {
 798                                 case -EINPROGRESS:
 799                                 case -EBUSY:
 800                                 case -EIDRM:
 801                                         continue;
 802                                 default:
 803                                         ERROR(ctx->dev, "urb unlink --> %d\n",
 804                                                         status);
 805                                 }
 806                         }
 807                         status = ctx->status;
 808                 }
 809         }
 810
 811         /* resubmit if we need to, else mark this as done */
 812         if ((status == 0) && (ctx->pending < ctx->count)) {
 813                 if ((status = usb_submit_urb (urb, GFP_ATOMIC)) != 0) {
 814                         ERROR(ctx->dev,
 815                                 "can't resubmit ctrl %02x.%02x, err %d\n",
 816                                 reqp->bRequestType, reqp->bRequest, status);
 817                         urb->dev = NULL;
 818                 } else
 819                         ctx->pending++;
 820         } else
 821                 urb->dev = NULL;
 822
 823         /* signal completion when nothing's queued */
 824         if (ctx->pending == 0)
 825                 complete (&ctx->complete);
 826         spin_unlock (&ctx->lock);
 827 }
 828
 829 static int
 830 test_ctrl_queue (struct usbtest_dev *dev, struct usbtest_param *param)
 831 {
 832         struct usb_device       *udev = testdev_to_usbdev (dev);
 833         struct urb              **urb;
 834         struct ctrl_ctx         context;
 835         int                     i;
 836
 837         spin_lock_init (&context.lock);
 838         context.dev = dev;
 839         init_completion (&context.complete);
 840         context.count = param->sglen * param->iterations;
 841         context.pending = 0;
 842         context.status = -ENOMEM;
 843         context.param = param;
 844         context.last = -1;
 845
 846         /* allocate and init the urbs we'll queue.
 847          * as with bulk/intr sglists, sglen is the queue depth; it also
 848          * controls which subtests run (more tests than sglen) or rerun.
 849          */
 850         urb = kcalloc(param->sglen, sizeof(struct urb *), GFP_KERNEL);
 851         if (!urb)
 852                 return -ENOMEM;
 853         for (i = 0; i < param->sglen; i++) {
 854                 int                     pipe = usb_rcvctrlpipe (udev, 0);
 855                 unsigned                len;
 856                 struct urb              *u;
 857                 struct usb_ctrlrequest  req;
 858                 struct subcase          *reqp;
 859
 860                 /* sign of this variable means:
 861                  *  -: tested code must return this (negative) error code
 862                  *  +: tested code may return this (negative too) error code
 863                  */
 864                 int                     expected = 0;
 865
 866                 /* requests here are mostly expected to succeed on any
 867                  * device, but some are chosen to trigger protocol stalls
 868                  * or short reads.
 869                  */
 870                 memset (&req, 0, sizeof req);
 871                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
 872                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 873
 874                 switch (i % NUM_SUBCASES) {
 875                 case 0:         // get device descriptor
 876                         req.wValue = cpu_to_le16 (USB_DT_DEVICE << 8);
 877                         len = sizeof (struct usb_device_descriptor);
 878                         break;
 879                 case 1:         // get first config descriptor (only)
 880                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 881                         len = sizeof (struct usb_config_descriptor);
 882                         break;
 883                 case 2:         // get altsetting (OFTEN STALLS)
 884                         req.bRequest = USB_REQ_GET_INTERFACE;
 885                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 886                         // index = 0 means first interface
 887                         len = 1;
 888                         expected = EPIPE;
 889                         break;
 890                 case 3:         // get interface status
 891                         req.bRequest = USB_REQ_GET_STATUS;
 892                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 893                         // interface 0
 894                         len = 2;
 895                         break;
 896                 case 4:         // get device status
 897                         req.bRequest = USB_REQ_GET_STATUS;
 898                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 899                         len = 2;
 900                         break;
 901                 case 5:         // get device qualifier (MAY STALL)
 902                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
 903                         len = sizeof (struct usb_qualifier_descriptor);
 904                         if (udev->speed != USB_SPEED_HIGH)
 905                                 expected = EPIPE;
 906                         break;
 907                 case 6:         // get first config descriptor, plus interface
 908                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 909                         len = sizeof (struct usb_config_descriptor);
 910                         len += sizeof (struct usb_interface_descriptor);
 911                         break;
 912                 case 7:         // get interface descriptor (ALWAYS STALLS)
 913                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
 914                         // interface == 0
 915                         len = sizeof (struct usb_interface_descriptor);
 916                         expected = -EPIPE;
 917                         break;
 918                 // NOTE: two consecutive stalls in the queue here.
 919                 // that tests fault recovery a bit more aggressively.
 920                 case 8:         // clear endpoint halt (MAY STALL)
 921                         req.bRequest = USB_REQ_CLEAR_FEATURE;
 922                         req.bRequestType = USB_RECIP_ENDPOINT;
 923                         // wValue 0 == ep halt
 924                         // wIndex 0 == ep0 (shouldn't halt!)
 925                         len = 0;
 926                         pipe = usb_sndctrlpipe (udev, 0);
 927                         expected = EPIPE;
 928                         break;
 929                 case 9:         // get endpoint status
 930                         req.bRequest = USB_REQ_GET_STATUS;
 931                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
 932                         // endpoint 0
 933                         len = 2;
 934                         break;
 935                 case 10:        // trigger short read (EREMOTEIO)
 936                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 937                         len = 1024;
 938                         expected = -EREMOTEIO;
 939                         break;
 940                 // NOTE: two consecutive _different_ faults in the queue.
 941                 case 11:        // get endpoint descriptor (ALWAYS STALLS)
 942                         req.wValue = cpu_to_le16 (USB_DT_ENDPOINT << 8);
 943                         // endpoint == 0
 944                         len = sizeof (struct usb_interface_descriptor);
 945                         expected = EPIPE;
 946                         break;
 947                 // NOTE: sometimes even a third fault in the queue!
 948                 case 12:        // get string 0 descriptor (MAY STALL)
 949                         req.wValue = cpu_to_le16 (USB_DT_STRING << 8);
 950                         // string == 0, for language IDs
 951                         len = sizeof (struct usb_interface_descriptor);
 952                         // may succeed when > 4 languages
 953                         expected = EREMOTEIO;   // or EPIPE, if no strings
 954                         break;
 955                 case 13:        // short read, resembling case 10
 956                         req.wValue = cpu_to_le16 ((USB_DT_CONFIG << 8) | 0);
 957                         // last data packet "should" be DATA1, not DATA0
 958                         len = 1024 - udev->descriptor.bMaxPacketSize0;
 959                         expected = -EREMOTEIO;
 960                         break;
 961                 case 14:        // short read; try to fill the last packet
 962                         req.wValue = cpu_to_le16 ((USB_DT_DEVICE << 8) | 0);
 963                         /* device descriptor size == 18 bytes */
 964                         len = udev->descriptor.bMaxPacketSize0;
 965                         switch (len) {
 966                         case 8:         len = 24; break;
 967                         case 16:        len = 32; break;
 968                         }
 969                         expected = -EREMOTEIO;
 970                         break;
 971                 default:
 972                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
 973                         context.status = -EINVAL;
 974                         goto cleanup;
 975                 }
 976                 req.wLength = cpu_to_le16 (len);
 977                 urb [i] = u = simple_alloc_urb (udev, pipe, len);
 978                 if (!u)
 979                         goto cleanup;
 980
 981                 reqp = usb_buffer_alloc (udev, sizeof *reqp, GFP_KERNEL,
 982                                 &u->setup_dma);
 983                 if (!reqp)
 984                         goto cleanup;
 985                 reqp->setup = req;
 986                 reqp->number = i % NUM_SUBCASES;
 987                 reqp->expected = expected;
 988                 u->setup_packet = (char *) &reqp->setup;
 989                 u->transfer_flags |= URB_NO_SETUP_DMA_MAP;
 990
 991                 u->context = &context;
 992                 u->complete = ctrl_complete;
 993         }
 994
 995         /* queue the urbs */
 996         context.urb = urb;
 997         spin_lock_irq (&context.lock);
 998         for (i = 0; i < param->sglen; i++) {
 999                 context.status = usb_submit_urb (urb [i], GFP_ATOMIC);
1000                 if (context.status != 0) {
1001                         ERROR(dev, "can't submit urb[%d], status %d\n",
1002                                         i, context.status);
1003                         context.count = context.pending;
1004                         break;
1005                 }
1006                 context.pending++;
1007         }
1008         spin_unlock_irq (&context.lock);
1009
1010         /* FIXME  set timer and time out; provide a disconnect hook */
1011
1012         /* wait for the last one to complete */
1013         if (context.pending > 0)
1014                 wait_for_completion (&context.complete);
1015
1016 cleanup:
1017         for (i = 0; i < param->sglen; i++) {
1018                 if (!urb [i])
1019                         continue;
1020                 urb [i]->dev = udev;
1021                 if (urb [i]->setup_packet)
1022                         usb_buffer_free (udev, sizeof (struct usb_ctrlrequest),
1023                                         urb [i]->setup_packet,
1024                                         urb [i]->setup_dma);
1025                 simple_free_urb (urb [i]);
1026         }
1027         kfree (urb);
1028         return context.status;
1029 }
1030 #undef NUM_SUBCASES
1031
1032
1033 /*-------------------------------------------------------------------------*/
1034
1035 static void unlink1_callback (struct urb *urb)
1036 {
1037         int     status = urb->status;
1038
1039         // we "know" -EPIPE (stall) never happens
1040         if (!status)
1041                 status = usb_submit_urb (urb, GFP_ATOMIC);
1042         if (status) {
1043                 urb->status = status;
1044                 complete(urb->context);
1045         }
1046 }
1047
1048 static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
1049 {
1050         struct urb              *urb;
1051         struct completion       completion;
1052         int                     retval = 0;
1053
1054         init_completion (&completion);
1055         urb = simple_alloc_urb (testdev_to_usbdev (dev), pipe, size);
1056         if (!urb)
1057                 return -ENOMEM;
1058         urb->context = &completion;
1059         urb->complete = unlink1_callback;
1060
1061         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1062          * states, and testing should get to all of them over time.
1063          *
1064          * FIXME want additional tests for when endpoint is STALLing
1065          * due to errors, or is just NAKing requests.
1066          */
1067         if ((retval = usb_submit_urb (urb, GFP_KERNEL)) != 0) {
1068                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1069                 return retval;
1070         }
1071
1072         /* unlinking that should always work.  variable delay tests more
1073          * hcd states and code paths, even with little other system load.
1074          */
1075         msleep (jiffies % (2 * INTERRUPT_RATE));
1076         if (async) {
1077 retry:
1078                 retval = usb_unlink_urb (urb);
1079                 if (retval == -EBUSY || retval == -EIDRM) {
1080                         /* we can't unlink urbs while they're completing.
1081                          * or if they've completed, and we haven't resubmitted.
1082                          * "normal" drivers would prevent resubmission, but
1083                          * since we're testing unlink paths, we can't.
1084                          */
1085                         ERROR(dev,  "unlink retry\n");
1086                         goto retry;
1087                 }
1088         } else
1089                 usb_kill_urb (urb);
1090         if (!(retval == 0 || retval == -EINPROGRESS)) {
1091                 dev_err(&dev->intf->dev, "unlink fail %d\n", retval);
1092                 return retval;
1093         }
1094
1095         wait_for_completion (&completion);
1096         retval = urb->status;
1097         simple_free_urb (urb);
1098
1099         if (async)
1100                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1101         else
1102                 return (retval == -ENOENT || retval == -EPERM) ?
1103                                 0 : retval - 2000;
1104 }
1105
1106 static int unlink_simple (struct usbtest_dev *dev, int pipe, int len)
1107 {
1108         int                     retval = 0;
1109
1110         /* test sync and async paths */
1111         retval = unlink1 (dev, pipe, len, 1);
1112         if (!retval)
1113                 retval = unlink1 (dev, pipe, len, 0);
1114         return retval;
1115 }
1116
1117 /*-------------------------------------------------------------------------*/
1118
1119 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1120 {
1121         int     retval;
1122         u16     status;
1123
1124         /* shouldn't look or act halted */
1125         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1126         if (retval < 0) {
1127                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1128                                 ep, retval);
1129                 return retval;
1130         }
1131         if (status != 0) {
1132                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1133                 return -EINVAL;
1134         }
1135         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1136         if (retval != 0)
1137                 return -EINVAL;
1138         return 0;
1139 }
1140
1141 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1142 {
1143         int     retval;
1144         u16     status;
1145
1146         /* should look and act halted */
1147         retval = usb_get_status (urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1148         if (retval < 0) {
1149                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1150                                 ep, retval);
1151                 return retval;
1152         }
1153         le16_to_cpus(&status);
1154         if (status != 1) {
1155                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1156                 return -EINVAL;
1157         }
1158         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1159         if (retval != -EPIPE)
1160                 return -EINVAL;
1161         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1162         if (retval != -EPIPE)
1163                 return -EINVAL;
1164         return 0;
1165 }
1166
1167 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1168 {
1169         int     retval;
1170
1171         /* shouldn't look or act halted now */
1172         retval = verify_not_halted(tdev, 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                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1183                 return retval;
1184         }
1185         retval = verify_halted(tdev, 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                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1193                 return retval;
1194         }
1195         retval = verify_not_halted(tdev, 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(dev, 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(dev, 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;
1246         int                     retval;
1247         u8                      *buf;
1248         char                    *what = "?";
1249         struct usb_device       *udev;
1250
1251         if (length < 1 || length > 0xffff || vary >= length)
1252                 return -EINVAL;
1253
1254         buf = kmalloc(length, GFP_KERNEL);
1255         if (!buf)
1256                 return -ENOMEM;
1257
1258         udev = testdev_to_usbdev (dev);
1259         len = length;
1260         retval = 0;
1261
1262         /* NOTE:  hardware might well act differently if we pushed it
1263          * with lots back-to-back queued requests.
1264          */
1265         for (i = 0; i < count; i++) {
1266                 /* write patterned data */
1267                 for (j = 0; j < len; j++)
1268                         buf [j] = i + j;
1269                 retval = usb_control_msg (udev, usb_sndctrlpipe (udev,0),
1270                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1271                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1272                 if (retval != len) {
1273                         what = "write";
1274                         if (retval >= 0) {
1275                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1276                                                 retval, len);
1277                                 retval = -EBADMSG;
1278                         }
1279                         break;
1280                 }
1281
1282                 /* read it back -- assuming nothing intervened!!  */
1283                 retval = usb_control_msg (udev, usb_rcvctrlpipe (udev,0),
1284                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1285                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1286                 if (retval != len) {
1287                         what = "read";
1288                         if (retval >= 0) {
1289                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1290                                                 retval, len);
1291                                 retval = -EBADMSG;
1292                         }
1293                         break;
1294                 }
1295
1296                 /* fail if we can't verify */
1297                 for (j = 0; j < len; j++) {
1298                         if (buf [j] != (u8) (i + j)) {
1299                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1300                                         j, buf [j], (u8) i + j);
1301                                 retval = -EBADMSG;
1302                                 break;
1303                         }
1304                 }
1305                 if (retval < 0) {
1306                         what = "verify";
1307                         break;
1308                 }
1309
1310                 len += vary;
1311
1312                 /* [real world] the "zero bytes IN" case isn't really used.
1313                  * hardware can easily trip up in this weird case, since its
1314                  * status stage is IN, not OUT like other ep0in transfers.
1315                  */
1316                 if (len > length)
1317                         len = realworld ? 1 : 0;
1318         }
1319
1320         if (retval < 0)
1321                 ERROR (dev, "ctrl_out %s failed, code %d, count %d\n",
1322                         what, retval, i);
1323
1324         kfree (buf);
1325         return retval;
1326 }
1327
1328 /*-------------------------------------------------------------------------*/
1329
1330 /* ISO tests ... mimics common usage
1331  *  - buffer length is split into N packets (mostly maxpacket sized)
1332  *  - multi-buffers according to sglen
1333  */
1334
1335 struct iso_context {
1336         unsigned                count;
1337         unsigned                pending;
1338         spinlock_t              lock;
1339         struct completion       done;
1340         int                     submit_error;
1341         unsigned long           errors;
1342         unsigned long           packet_count;
1343         struct usbtest_dev      *dev;
1344 };
1345
1346 static void iso_callback (struct urb *urb)
1347 {
1348         struct iso_context      *ctx = urb->context;
1349
1350         spin_lock(&ctx->lock);
1351         ctx->count--;
1352
1353         ctx->packet_count += urb->number_of_packets;
1354         if (urb->error_count > 0)
1355                 ctx->errors += urb->error_count;
1356         else if (urb->status != 0)
1357                 ctx->errors += urb->number_of_packets;
1358
1359         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1360                         && !ctx->submit_error) {
1361                 int status = usb_submit_urb (urb, GFP_ATOMIC);
1362                 switch (status) {
1363                 case 0:
1364                         goto done;
1365                 default:
1366                         dev_err(&ctx->dev->intf->dev,
1367                                         "iso resubmit err %d\n",
1368                                         status);
1369                         /* FALLTHROUGH */
1370                 case -ENODEV:                   /* disconnected */
1371                 case -ESHUTDOWN:                /* endpoint disabled */
1372                         ctx->submit_error = 1;
1373                         break;
1374                 }
1375         }
1376         simple_free_urb (urb);
1377
1378         ctx->pending--;
1379         if (ctx->pending == 0) {
1380                 if (ctx->errors)
1381                         dev_err(&ctx->dev->intf->dev,
1382                                 "iso test, %lu errors out of %lu\n",
1383                                 ctx->errors, ctx->packet_count);
1384                 complete (&ctx->done);
1385         }
1386 done:
1387         spin_unlock(&ctx->lock);
1388 }
1389
1390 static struct urb *iso_alloc_urb (
1391         struct usb_device       *udev,
1392         int                     pipe,
1393         struct usb_endpoint_descriptor  *desc,
1394         long                    bytes
1395 )
1396 {
1397         struct urb              *urb;
1398         unsigned                i, maxp, packets;
1399
1400         if (bytes < 0 || !desc)
1401                 return NULL;
1402         maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
1403         maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
1404         packets = DIV_ROUND_UP(bytes, maxp);
1405
1406         urb = usb_alloc_urb (packets, GFP_KERNEL);
1407         if (!urb)
1408                 return urb;
1409         urb->dev = udev;
1410         urb->pipe = pipe;
1411
1412         urb->number_of_packets = packets;
1413         urb->transfer_buffer_length = bytes;
1414         urb->transfer_buffer = usb_buffer_alloc (udev, bytes, GFP_KERNEL,
1415                         &urb->transfer_dma);
1416         if (!urb->transfer_buffer) {
1417                 usb_free_urb (urb);
1418                 return NULL;
1419         }
1420         memset (urb->transfer_buffer, 0, bytes);
1421         for (i = 0; i < packets; i++) {
1422                 /* here, only the last packet will be short */
1423                 urb->iso_frame_desc[i].length = min ((unsigned) bytes, maxp);
1424                 bytes -= urb->iso_frame_desc[i].length;
1425
1426                 urb->iso_frame_desc[i].offset = maxp * i;
1427         }
1428
1429         urb->complete = iso_callback;
1430         // urb->context = SET BY CALLER
1431         urb->interval = 1 << (desc->bInterval - 1);
1432         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1433         return urb;
1434 }
1435
1436 static int
1437 test_iso_queue (struct usbtest_dev *dev, struct usbtest_param *param,
1438                 int pipe, struct usb_endpoint_descriptor *desc)
1439 {
1440         struct iso_context      context;
1441         struct usb_device       *udev;
1442         unsigned                i;
1443         unsigned long           packets = 0;
1444         int                     status = 0;
1445         struct urb              *urbs[10];      /* FIXME no limit */
1446
1447         if (param->sglen > 10)
1448                 return -EDOM;
1449
1450         memset(&context, 0, sizeof context);
1451         context.count = param->iterations * param->sglen;
1452         context.dev = dev;
1453         init_completion (&context.done);
1454         spin_lock_init (&context.lock);
1455
1456         memset (urbs, 0, sizeof urbs);
1457         udev = testdev_to_usbdev (dev);
1458         dev_info(&dev->intf->dev,
1459                 "... iso period %d %sframes, wMaxPacket %04x\n",
1460                 1 << (desc->bInterval - 1),
1461                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1462                 le16_to_cpu(desc->wMaxPacketSize));
1463
1464         for (i = 0; i < param->sglen; i++) {
1465                 urbs [i] = iso_alloc_urb (udev, pipe, desc,
1466                                 param->length);
1467                 if (!urbs [i]) {
1468                         status = -ENOMEM;
1469                         goto fail;
1470                 }
1471                 packets += urbs[i]->number_of_packets;
1472                 urbs [i]->context = &context;
1473         }
1474         packets *= param->iterations;
1475         dev_info(&dev->intf->dev,
1476                 "... total %lu msec (%lu packets)\n",
1477                 (packets * (1 << (desc->bInterval - 1)))
1478                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1479                 packets);
1480
1481         spin_lock_irq (&context.lock);
1482         for (i = 0; i < param->sglen; i++) {
1483                 ++context.pending;
1484                 status = usb_submit_urb (urbs [i], GFP_ATOMIC);
1485                 if (status < 0) {
1486                         ERROR (dev, "submit iso[%d], error %d\n", i, status);
1487                         if (i == 0) {
1488                                 spin_unlock_irq (&context.lock);
1489                                 goto fail;
1490                         }
1491
1492                         simple_free_urb (urbs [i]);
1493                         context.pending--;
1494                         context.submit_error = 1;
1495                         break;
1496                 }
1497         }
1498         spin_unlock_irq (&context.lock);
1499
1500         wait_for_completion (&context.done);
1501
1502         /*
1503          * Isochronous transfers are expected to fail sometimes.  As an
1504          * arbitrary limit, we will report an error if any submissions
1505          * fail or if the transfer failure rate is > 10%.
1506          */
1507         if (status != 0)
1508                 ;
1509         else if (context.submit_error)
1510                 status = -EACCES;
1511         else if (context.errors > context.packet_count / 10)
1512                 status = -EIO;
1513         return status;
1514
1515 fail:
1516         for (i = 0; i < param->sglen; i++) {
1517                 if (urbs [i])
1518                         simple_free_urb (urbs [i]);
1519         }
1520         return status;
1521 }
1522
1523 /*-------------------------------------------------------------------------*/
1524
1525 /* We only have this one interface to user space, through usbfs.
1526  * User mode code can scan usbfs to find N different devices (maybe on
1527  * different busses) to use when testing, and allocate one thread per
1528  * test.  So discovery is simplified, and we have no device naming issues.
1529  *
1530  * Don't use these only as stress/load tests.  Use them along with with
1531  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1532  * video capture, and so on.  Run different tests at different times, in
1533  * different sequences.  Nothing here should interact with other devices,
1534  * except indirectly by consuming USB bandwidth and CPU resources for test
1535  * threads and request completion.  But the only way to know that for sure
1536  * is to test when HC queues are in use by many devices.
1537  *
1538  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
1539  * it locks out usbcore in certain code paths.  Notably, if you disconnect
1540  * the device-under-test, khubd will wait block forever waiting for the
1541  * ioctl to complete ... so that usb_disconnect() can abort the pending
1542  * urbs and then call usbtest_disconnect().  To abort a test, you're best
1543  * off just killing the userspace task and waiting for it to exit.
1544  */
1545
1546 static int
1547 usbtest_ioctl (struct usb_interface *intf, unsigned int code, void *buf)
1548 {
1549         struct usbtest_dev      *dev = usb_get_intfdata (intf);
1550         struct usb_device       *udev = testdev_to_usbdev (dev);
1551         struct usbtest_param    *param = buf;
1552         int                     retval = -EOPNOTSUPP;
1553         struct urb              *urb;
1554         struct scatterlist      *sg;
1555         struct usb_sg_request   req;
1556         struct timeval          start;
1557         unsigned                i;
1558
1559         // FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is.
1560
1561         if (code != USBTEST_REQUEST)
1562                 return -EOPNOTSUPP;
1563
1564         if (param->iterations <= 0)
1565                 return -EINVAL;
1566
1567         if (mutex_lock_interruptible(&dev->lock))
1568                 return -ERESTARTSYS;
1569
1570         /* FIXME: What if a system sleep starts while a test is running? */
1571         if (!intf->is_active) {
1572                 mutex_unlock(&dev->lock);
1573                 return -EHOSTUNREACH;
1574         }
1575
1576         /* some devices, like ez-usb default devices, need a non-default
1577          * altsetting to have any active endpoints.  some tests change
1578          * altsettings; force a default so most tests don't need to check.
1579          */
1580         if (dev->info->alt >= 0) {
1581                 int     res;
1582
1583                 if (intf->altsetting->desc.bInterfaceNumber) {
1584                         mutex_unlock(&dev->lock);
1585                         return -ENODEV;
1586                 }
1587                 res = set_altsetting (dev, dev->info->alt);
1588                 if (res) {
1589                         dev_err (&intf->dev,
1590                                         "set altsetting to %d failed, %d\n",
1591                                         dev->info->alt, res);
1592                         mutex_unlock(&dev->lock);
1593                         return res;
1594                 }
1595         }
1596
1597         /*
1598          * Just a bunch of test cases that every HCD is expected to handle.
1599          *
1600          * Some may need specific firmware, though it'd be good to have
1601          * one firmware image to handle all the test cases.
1602          *
1603          * FIXME add more tests!  cancel requests, verify the data, control
1604          * queueing, concurrent read+write threads, and so on.
1605          */
1606         do_gettimeofday (&start);
1607         switch (param->test_num) {
1608
1609         case 0:
1610                 dev_info(&intf->dev, "TEST 0:  NOP\n");
1611                 retval = 0;
1612                 break;
1613
1614         /* Simple non-queued bulk I/O tests */
1615         case 1:
1616                 if (dev->out_pipe == 0)
1617                         break;
1618                 dev_info(&intf->dev,
1619                                 "TEST 1:  write %d bytes %u times\n",
1620                                 param->length, param->iterations);
1621                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1622                 if (!urb) {
1623                         retval = -ENOMEM;
1624                         break;
1625                 }
1626                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1627                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
1628                 simple_free_urb (urb);
1629                 break;
1630         case 2:
1631                 if (dev->in_pipe == 0)
1632                         break;
1633                 dev_info(&intf->dev,
1634                                 "TEST 2:  read %d bytes %u times\n",
1635                                 param->length, param->iterations);
1636                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1637                 if (!urb) {
1638                         retval = -ENOMEM;
1639                         break;
1640                 }
1641                 // FIRMWARE:  bulk source (maybe generates short writes)
1642                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
1643                 simple_free_urb (urb);
1644                 break;
1645         case 3:
1646                 if (dev->out_pipe == 0 || param->vary == 0)
1647                         break;
1648                 dev_info(&intf->dev,
1649                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
1650                                 param->vary, param->length, param->iterations);
1651                 urb = simple_alloc_urb (udev, dev->out_pipe, param->length);
1652                 if (!urb) {
1653                         retval = -ENOMEM;
1654                         break;
1655                 }
1656                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1657                 retval = simple_io(dev, urb, param->iterations, param->vary,
1658                                         0, "test3");
1659                 simple_free_urb (urb);
1660                 break;
1661         case 4:
1662                 if (dev->in_pipe == 0 || param->vary == 0)
1663                         break;
1664                 dev_info(&intf->dev,
1665                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
1666                                 param->vary, param->length, param->iterations);
1667                 urb = simple_alloc_urb (udev, dev->in_pipe, param->length);
1668                 if (!urb) {
1669                         retval = -ENOMEM;
1670                         break;
1671                 }
1672                 // FIRMWARE:  bulk source (maybe generates short writes)
1673                 retval = simple_io(dev, urb, param->iterations, param->vary,
1674                                         0, "test4");
1675                 simple_free_urb (urb);
1676                 break;
1677
1678         /* Queued bulk I/O tests */
1679         case 5:
1680                 if (dev->out_pipe == 0 || param->sglen == 0)
1681                         break;
1682                 dev_info(&intf->dev,
1683                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
1684                                 param->iterations,
1685                                 param->sglen, param->length);
1686                 sg = alloc_sglist (param->sglen, param->length, 0);
1687                 if (!sg) {
1688                         retval = -ENOMEM;
1689                         break;
1690                 }
1691                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1692                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1693                                 &req, sg, param->sglen);
1694                 free_sglist (sg, param->sglen);
1695                 break;
1696
1697         case 6:
1698                 if (dev->in_pipe == 0 || param->sglen == 0)
1699                         break;
1700                 dev_info(&intf->dev,
1701                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
1702                                 param->iterations,
1703                                 param->sglen, param->length);
1704                 sg = alloc_sglist (param->sglen, param->length, 0);
1705                 if (!sg) {
1706                         retval = -ENOMEM;
1707                         break;
1708                 }
1709                 // FIRMWARE:  bulk source (maybe generates short writes)
1710                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1711                                 &req, sg, param->sglen);
1712                 free_sglist (sg, param->sglen);
1713                 break;
1714         case 7:
1715                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
1716                         break;
1717                 dev_info(&intf->dev,
1718                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
1719                                 param->vary, param->iterations,
1720                                 param->sglen, param->length);
1721                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1722                 if (!sg) {
1723                         retval = -ENOMEM;
1724                         break;
1725                 }
1726                 // FIRMWARE:  bulk sink (maybe accepts short writes)
1727                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1728                                 &req, sg, param->sglen);
1729                 free_sglist (sg, param->sglen);
1730                 break;
1731         case 8:
1732                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
1733                         break;
1734                 dev_info(&intf->dev,
1735                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
1736                                 param->vary, param->iterations,
1737                                 param->sglen, param->length);
1738                 sg = alloc_sglist (param->sglen, param->length, param->vary);
1739                 if (!sg) {
1740                         retval = -ENOMEM;
1741                         break;
1742                 }
1743                 // FIRMWARE:  bulk source (maybe generates short writes)
1744                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1745                                 &req, sg, param->sglen);
1746                 free_sglist (sg, param->sglen);
1747                 break;
1748
1749         /* non-queued sanity tests for control (chapter 9 subset) */
1750         case 9:
1751                 retval = 0;
1752                 dev_info(&intf->dev,
1753                         "TEST 9:  ch9 (subset) control tests, %d times\n",
1754                                 param->iterations);
1755                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1756                         retval = ch9_postconfig (dev);
1757                 if (retval)
1758                         dev_err(&intf->dev, "ch9 subset failed, "
1759                                         "iterations left %d\n", i);
1760                 break;
1761
1762         /* queued control messaging */
1763         case 10:
1764                 if (param->sglen == 0)
1765                         break;
1766                 retval = 0;
1767                 dev_info(&intf->dev,
1768                                 "TEST 10:  queue %d control calls, %d times\n",
1769                                 param->sglen,
1770                                 param->iterations);
1771                 retval = test_ctrl_queue (dev, param);
1772                 break;
1773
1774         /* simple non-queued unlinks (ring with one urb) */
1775         case 11:
1776                 if (dev->in_pipe == 0 || !param->length)
1777                         break;
1778                 retval = 0;
1779                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
1780                                 param->iterations, param->length);
1781                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1782                         retval = unlink_simple (dev, dev->in_pipe,
1783                                                 param->length);
1784                 if (retval)
1785                         dev_err(&intf->dev, "unlink reads failed %d, "
1786                                 "iterations left %d\n", retval, i);
1787                 break;
1788         case 12:
1789                 if (dev->out_pipe == 0 || !param->length)
1790                         break;
1791                 retval = 0;
1792                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
1793                                 param->iterations, param->length);
1794                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1795                         retval = unlink_simple (dev, dev->out_pipe,
1796                                                 param->length);
1797                 if (retval)
1798                         dev_err(&intf->dev, "unlink writes failed %d, "
1799                                 "iterations left %d\n", retval, i);
1800                 break;
1801
1802         /* ep halt tests */
1803         case 13:
1804                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
1805                         break;
1806                 retval = 0;
1807                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
1808                                 param->iterations);
1809                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1810                         retval = halt_simple (dev);
1811
1812                 if (retval)
1813                         ERROR(dev, "halts failed, iterations left %d\n", i);
1814                 break;
1815
1816         /* control write tests */
1817         case 14:
1818                 if (!dev->info->ctrl_out)
1819                         break;
1820                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
1821                                 param->iterations,
1822                                 realworld ? 1 : 0, param->length,
1823                                 param->vary);
1824                 retval = ctrl_out(dev, param->iterations,
1825                                 param->length, param->vary);
1826                 break;
1827
1828         /* iso write tests */
1829         case 15:
1830                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
1831                         break;
1832                 dev_info(&intf->dev,
1833                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
1834                                 param->iterations,
1835                                 param->sglen, param->length);
1836                 // FIRMWARE:  iso sink
1837                 retval = test_iso_queue (dev, param,
1838                                 dev->out_iso_pipe, dev->iso_out);
1839                 break;
1840
1841         /* iso read tests */
1842         case 16:
1843                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
1844                         break;
1845                 dev_info(&intf->dev,
1846                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
1847                                 param->iterations,
1848                                 param->sglen, param->length);
1849                 // FIRMWARE:  iso source
1850                 retval = test_iso_queue (dev, param,
1851                                 dev->in_iso_pipe, dev->iso_in);
1852                 break;
1853
1854         // FIXME unlink from queue (ring with N urbs)
1855
1856         // FIXME scatterlist cancel (needs helper thread)
1857
1858         }
1859         do_gettimeofday (&param->duration);
1860         param->duration.tv_sec -= start.tv_sec;
1861         param->duration.tv_usec -= start.tv_usec;
1862         if (param->duration.tv_usec < 0) {
1863                 param->duration.tv_usec += 1000 * 1000;
1864                 param->duration.tv_sec -= 1;
1865         }
1866         mutex_unlock(&dev->lock);
1867         return retval;
1868 }
1869
1870 /*-------------------------------------------------------------------------*/
1871
1872 static unsigned force_interrupt = 0;
1873 module_param (force_interrupt, uint, 0);
1874 MODULE_PARM_DESC (force_interrupt, "0 = test default; else interrupt");
1875
1876 #ifdef  GENERIC
1877 static unsigned short vendor;
1878 module_param(vendor, ushort, 0);
1879 MODULE_PARM_DESC (vendor, "vendor code (from usb-if)");
1880
1881 static unsigned short product;
1882 module_param(product, ushort, 0);
1883 MODULE_PARM_DESC (product, "product code (from vendor)");
1884 #endif
1885
1886 static int
1887 usbtest_probe (struct usb_interface *intf, const struct usb_device_id *id)
1888 {
1889         struct usb_device       *udev;
1890         struct usbtest_dev      *dev;
1891         struct usbtest_info     *info;
1892         char                    *rtest, *wtest;
1893         char                    *irtest, *iwtest;
1894
1895         udev = interface_to_usbdev (intf);
1896
1897 #ifdef  GENERIC
1898         /* specify devices by module parameters? */
1899         if (id->match_flags == 0) {
1900                 /* vendor match required, product match optional */
1901                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
1902                         return -ENODEV;
1903                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
1904                         return -ENODEV;
1905                 dev_info(&intf->dev, "matched module params, "
1906                                         "vend=0x%04x prod=0x%04x\n",
1907                                 le16_to_cpu(udev->descriptor.idVendor),
1908                                 le16_to_cpu(udev->descriptor.idProduct));
1909         }
1910 #endif
1911
1912         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1913         if (!dev)
1914                 return -ENOMEM;
1915         info = (struct usbtest_info *) id->driver_info;
1916         dev->info = info;
1917         mutex_init(&dev->lock);
1918
1919         dev->intf = intf;
1920
1921         /* cacheline-aligned scratch for i/o */
1922         if ((dev->buf = kmalloc (TBUF_SIZE, GFP_KERNEL)) == NULL) {
1923                 kfree (dev);
1924                 return -ENOMEM;
1925         }
1926
1927         /* NOTE this doesn't yet test the handful of difference that are
1928          * visible with high speed interrupts:  bigger maxpacket (1K) and
1929          * "high bandwidth" modes (up to 3 packets/uframe).
1930          */
1931         rtest = wtest = "";
1932         irtest = iwtest = "";
1933         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
1934                 if (info->ep_in) {
1935                         dev->in_pipe = usb_rcvintpipe (udev, info->ep_in);
1936                         rtest = " intr-in";
1937                 }
1938                 if (info->ep_out) {
1939                         dev->out_pipe = usb_sndintpipe (udev, info->ep_out);
1940                         wtest = " intr-out";
1941                 }
1942         } else {
1943                 if (info->autoconf) {
1944                         int status;
1945
1946                         status = get_endpoints (dev, intf);
1947                         if (status < 0) {
1948                                 WARNING(dev, "couldn't get endpoints, %d\n",
1949                                                 status);
1950                                 return status;
1951                         }
1952                         /* may find bulk or ISO pipes */
1953                 } else {
1954                         if (info->ep_in)
1955                                 dev->in_pipe = usb_rcvbulkpipe (udev,
1956                                                         info->ep_in);
1957                         if (info->ep_out)
1958                                 dev->out_pipe = usb_sndbulkpipe (udev,
1959                                                         info->ep_out);
1960                 }
1961                 if (dev->in_pipe)
1962                         rtest = " bulk-in";
1963                 if (dev->out_pipe)
1964                         wtest = " bulk-out";
1965                 if (dev->in_iso_pipe)
1966                         irtest = " iso-in";
1967                 if (dev->out_iso_pipe)
1968                         iwtest = " iso-out";
1969         }
1970
1971         usb_set_intfdata (intf, dev);
1972         dev_info (&intf->dev, "%s\n", info->name);
1973         dev_info (&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
1974                         ({ char *tmp;
1975                         switch (udev->speed) {
1976                         case USB_SPEED_LOW: tmp = "low"; break;
1977                         case USB_SPEED_FULL: tmp = "full"; break;
1978                         case USB_SPEED_HIGH: tmp = "high"; break;
1979                         default: tmp = "unknown"; break;
1980                         }; tmp; }),
1981                         info->ctrl_out ? " in/out" : "",
1982                         rtest, wtest,
1983                         irtest, iwtest,
1984                         info->alt >= 0 ? " (+alt)" : "");
1985         return 0;
1986 }
1987
1988 static int usbtest_suspend (struct usb_interface *intf, pm_message_t message)
1989 {
1990         return 0;
1991 }
1992
1993 static int usbtest_resume (struct usb_interface *intf)
1994 {
1995         return 0;
1996 }
1997
1998
1999 static void usbtest_disconnect (struct usb_interface *intf)
2000 {
2001         struct usbtest_dev      *dev = usb_get_intfdata (intf);
2002
2003         usb_set_intfdata (intf, NULL);
2004         dev_dbg (&intf->dev, "disconnect\n");
2005         kfree (dev);
2006 }
2007
2008 /* Basic testing only needs a device that can source or sink bulk traffic.
2009  * Any device can test control transfers (default with GENERIC binding).
2010  *
2011  * Several entries work with the default EP0 implementation that's built
2012  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2013  * by (very) small config EEPROMS, but otherwise all these devices act
2014  * identically until firmware is loaded:  only EP0 works.  It turns out
2015  * to be easy to make other endpoints work, without modifying that EP0
2016  * behavior.  For now, we expect that kind of firmware.
2017  */
2018
2019 /* an21xx or fx versions of ez-usb */
2020 static struct usbtest_info ez1_info = {
2021         .name           = "EZ-USB device",
2022         .ep_in          = 2,
2023         .ep_out         = 2,
2024         .alt            = 1,
2025 };
2026
2027 /* fx2 version of ez-usb */
2028 static struct usbtest_info ez2_info = {
2029         .name           = "FX2 device",
2030         .ep_in          = 6,
2031         .ep_out         = 2,
2032         .alt            = 1,
2033 };
2034
2035 /* ezusb family device with dedicated usb test firmware,
2036  */
2037 static struct usbtest_info fw_info = {
2038         .name           = "usb test device",
2039         .ep_in          = 2,
2040         .ep_out         = 2,
2041         .alt            = 1,
2042         .autoconf       = 1,            // iso and ctrl_out need autoconf
2043         .ctrl_out       = 1,
2044         .iso            = 1,            // iso_ep's are #8 in/out
2045 };
2046
2047 /* peripheral running Linux and 'zero.c' test firmware, or
2048  * its user-mode cousin. different versions of this use
2049  * different hardware with the same vendor/product codes.
2050  * host side MUST rely on the endpoint descriptors.
2051  */
2052 static struct usbtest_info gz_info = {
2053         .name           = "Linux gadget zero",
2054         .autoconf       = 1,
2055         .ctrl_out       = 1,
2056         .alt            = 0,
2057 };
2058
2059 static struct usbtest_info um_info = {
2060         .name           = "Linux user mode test driver",
2061         .autoconf       = 1,
2062         .alt            = -1,
2063 };
2064
2065 static struct usbtest_info um2_info = {
2066         .name           = "Linux user mode ISO test driver",
2067         .autoconf       = 1,
2068         .iso            = 1,
2069         .alt            = -1,
2070 };
2071
2072 #ifdef IBOT2
2073 /* this is a nice source of high speed bulk data;
2074  * uses an FX2, with firmware provided in the device
2075  */
2076 static struct usbtest_info ibot2_info = {
2077         .name           = "iBOT2 webcam",
2078         .ep_in          = 2,
2079         .alt            = -1,
2080 };
2081 #endif
2082
2083 #ifdef GENERIC
2084 /* we can use any device to test control traffic */
2085 static struct usbtest_info generic_info = {
2086         .name           = "Generic USB device",
2087         .alt            = -1,
2088 };
2089 #endif
2090
2091
2092 static struct usb_device_id id_table [] = {
2093
2094         /*-------------------------------------------------------------*/
2095
2096         /* EZ-USB devices which download firmware to replace (or in our
2097          * case augment) the default device implementation.
2098          */
2099
2100         /* generic EZ-USB FX controller */
2101         { USB_DEVICE (0x0547, 0x2235),
2102                 .driver_info = (unsigned long) &ez1_info,
2103                 },
2104
2105         /* CY3671 development board with EZ-USB FX */
2106         { USB_DEVICE (0x0547, 0x0080),
2107                 .driver_info = (unsigned long) &ez1_info,
2108                 },
2109
2110         /* generic EZ-USB FX2 controller (or development board) */
2111         { USB_DEVICE (0x04b4, 0x8613),
2112                 .driver_info = (unsigned long) &ez2_info,
2113                 },
2114
2115         /* re-enumerated usb test device firmware */
2116         { USB_DEVICE (0xfff0, 0xfff0),
2117                 .driver_info = (unsigned long) &fw_info,
2118                 },
2119
2120         /* "Gadget Zero" firmware runs under Linux */
2121         { USB_DEVICE (0x0525, 0xa4a0),
2122                 .driver_info = (unsigned long) &gz_info,
2123                 },
2124
2125         /* so does a user-mode variant */
2126         { USB_DEVICE (0x0525, 0xa4a4),
2127                 .driver_info = (unsigned long) &um_info,
2128                 },
2129
2130         /* ... and a user-mode variant that talks iso */
2131         { USB_DEVICE (0x0525, 0xa4a3),
2132                 .driver_info = (unsigned long) &um2_info,
2133                 },
2134
2135 #ifdef KEYSPAN_19Qi
2136         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2137         // this does not coexist with the real Keyspan 19qi driver!
2138         { USB_DEVICE (0x06cd, 0x010b),
2139                 .driver_info = (unsigned long) &ez1_info,
2140                 },
2141 #endif
2142
2143         /*-------------------------------------------------------------*/
2144
2145 #ifdef IBOT2
2146         /* iBOT2 makes a nice source of high speed bulk-in data */
2147         // this does not coexist with a real iBOT2 driver!
2148         { USB_DEVICE (0x0b62, 0x0059),
2149                 .driver_info = (unsigned long) &ibot2_info,
2150                 },
2151 #endif
2152
2153         /*-------------------------------------------------------------*/
2154
2155 #ifdef GENERIC
2156         /* module params can specify devices to use for control tests */
2157         { .driver_info = (unsigned long) &generic_info, },
2158 #endif
2159
2160         /*-------------------------------------------------------------*/
2161
2162         { }
2163 };
2164 MODULE_DEVICE_TABLE (usb, id_table);
2165
2166 static struct usb_driver usbtest_driver = {
2167         .name =         "usbtest",
2168         .id_table =     id_table,
2169         .probe =        usbtest_probe,
2170         .ioctl =        usbtest_ioctl,
2171         .disconnect =   usbtest_disconnect,
2172         .suspend =      usbtest_suspend,
2173         .resume =       usbtest_resume,
2174 };
2175
2176 /*-------------------------------------------------------------------------*/
2177
2178 static int __init usbtest_init (void)
2179 {
2180 #ifdef GENERIC
2181         if (vendor)
2182                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2183 #endif
2184         return usb_register (&usbtest_driver);
2185 }
2186 module_init (usbtest_init);
2187
2188 static void __exit usbtest_exit (void)
2189 {
2190         usb_deregister (&usbtest_driver);
2191 }
2192 module_exit (usbtest_exit);
2193
2194 MODULE_DESCRIPTION ("USB Core/HCD Testing Driver");
2195 MODULE_LICENSE ("GPL");
2196