tools/usb/testusb.c

   1 /* $(CROSS_COMPILE)cc -Wall -Wextra -g -lpthread -o testusb testusb.c */
   2
   3 /*
   4  * Copyright (c) 2002 by David Brownell
   5  * Copyright (c) 2010 by Samsung Electronics
   6  * Author: Michal Nazarewicz <mina86@mina86.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 /*
  24  * This program issues ioctls to perform the tests implemented by the
  25  * kernel driver.  It can generate a variety of transfer patterns; you
  26  * should make sure to test both regular streaming and mixes of
  27  * transfer sizes (including short transfers).
  28  *
  29  * For more information on how this can be used and on USB testing
  30  * refer to <URL:http://www.linux-usb.org/usbtest/>.
  31  */
  32
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <ftw.h>
  36 #include <stdlib.h>
  37 #include <pthread.h>
  38 #include <unistd.h>
  39 #include <errno.h>
  40 #include <limits.h>
  41
  42 #include <sys/types.h>
  43 #include <sys/stat.h>
  44 #include <fcntl.h>
  45
  46 #include <sys/ioctl.h>
  47 #include <linux/usbdevice_fs.h>
  48
  49 /*-------------------------------------------------------------------------*/
  50
  51 #define TEST_CASES      30
  52
  53 // FIXME make these public somewhere; usbdevfs.h?
  54
  55 struct usbtest_param {
  56         // inputs
  57         unsigned                test_num;       /* 0..(TEST_CASES-1) */
  58         unsigned                iterations;
  59         unsigned                length;
  60         unsigned                vary;
  61         unsigned                sglen;
  62
  63         // outputs
  64         struct timeval          duration;
  65 };
  66 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
  67
  68 /*-------------------------------------------------------------------------*/
  69
  70 /* #include <linux/usb_ch9.h> */
  71
  72 #define USB_DT_DEVICE                   0x01
  73 #define USB_DT_INTERFACE                0x04
  74
  75 #define USB_CLASS_PER_INTERFACE         0       /* for DeviceClass */
  76 #define USB_CLASS_VENDOR_SPEC           0xff
  77
  78
  79 struct usb_device_descriptor {
  80         __u8  bLength;
  81         __u8  bDescriptorType;
  82         __u16 bcdUSB;
  83         __u8  bDeviceClass;
  84         __u8  bDeviceSubClass;
  85         __u8  bDeviceProtocol;
  86         __u8  bMaxPacketSize0;
  87         __u16 idVendor;
  88         __u16 idProduct;
  89         __u16 bcdDevice;
  90         __u8  iManufacturer;
  91         __u8  iProduct;
  92         __u8  iSerialNumber;
  93         __u8  bNumConfigurations;
  94 } __attribute__ ((packed));
  95
  96 struct usb_interface_descriptor {
  97         __u8  bLength;
  98         __u8  bDescriptorType;
  99
 100         __u8  bInterfaceNumber;
 101         __u8  bAlternateSetting;
 102         __u8  bNumEndpoints;
 103         __u8  bInterfaceClass;
 104         __u8  bInterfaceSubClass;
 105         __u8  bInterfaceProtocol;
 106         __u8  iInterface;
 107 } __attribute__ ((packed));
 108
 109 enum usb_device_speed {
 110         USB_SPEED_UNKNOWN = 0,                  /* enumerating */
 111         USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
 112         USB_SPEED_HIGH                          /* usb 2.0 */
 113 };
 114
 115 /*-------------------------------------------------------------------------*/
 116
 117 static char *speed (enum usb_device_speed s)
 118 {
 119         switch (s) {
 120         case USB_SPEED_UNKNOWN: return "unknown";
 121         case USB_SPEED_LOW:     return "low";
 122         case USB_SPEED_FULL:    return "full";
 123         case USB_SPEED_HIGH:    return "high";
 124         default:                return "??";
 125         }
 126 }
 127
 128 struct testdev {
 129         struct testdev          *next;
 130         char                    *name;
 131         pthread_t               thread;
 132         enum usb_device_speed   speed;
 133         unsigned                ifnum : 8;
 134         unsigned                forever : 1;
 135         int                     test;
 136
 137         struct usbtest_param    param;
 138 };
 139 static struct testdev           *testdevs;
 140
 141 static int testdev_ffs_ifnum(FILE *fd)
 142 {
 143         union {
 144                 char buf[255];
 145                 struct usb_interface_descriptor intf;
 146         } u;
 147
 148         for (;;) {
 149                 if (fread(u.buf, 1, 1, fd) != 1)
 150                         return -1;
 151                 if (fread(u.buf + 1, (unsigned char)u.buf[0] - 1, 1, fd) != 1)
 152                         return -1;
 153
 154                 if (u.intf.bLength == sizeof u.intf
 155                  && u.intf.bDescriptorType == USB_DT_INTERFACE
 156                  && u.intf.bNumEndpoints == 2
 157                  && u.intf.bInterfaceClass == USB_CLASS_VENDOR_SPEC
 158                  && u.intf.bInterfaceSubClass == 0
 159                  && u.intf.bInterfaceProtocol == 0)
 160                         return (unsigned char)u.intf.bInterfaceNumber;
 161         }
 162 }
 163
 164 static int testdev_ifnum(FILE *fd)
 165 {
 166         struct usb_device_descriptor dev;
 167
 168         if (fread(&dev, sizeof dev, 1, fd) != 1)
 169                 return -1;
 170
 171         if (dev.bLength != sizeof dev || dev.bDescriptorType != USB_DT_DEVICE)
 172                 return -1;
 173
 174         /* FX2 with (tweaked) bulksrc firmware */
 175         if (dev.idVendor == 0x0547 && dev.idProduct == 0x1002)
 176                 return 0;
 177
 178         /*----------------------------------------------------*/
 179
 180         /* devices that start up using the EZ-USB default device and
 181          * which we can use after loading simple firmware.  hotplug
 182          * can fxload it, and then run this test driver.
 183          *
 184          * we return false positives in two cases:
 185          * - the device has a "real" driver (maybe usb-serial) that
 186          *   renumerates.  the device should vanish quickly.
 187          * - the device doesn't have the test firmware installed.
 188          */
 189
 190         /* generic EZ-USB FX controller */
 191         if (dev.idVendor == 0x0547 && dev.idProduct == 0x2235)
 192                 return 0;
 193
 194         /* generic EZ-USB FX2 controller */
 195         if (dev.idVendor == 0x04b4 && dev.idProduct == 0x8613)
 196                 return 0;
 197
 198         /* CY3671 development board with EZ-USB FX */
 199         if (dev.idVendor == 0x0547 && dev.idProduct == 0x0080)
 200                 return 0;
 201
 202         /* Keyspan 19Qi uses an21xx (original EZ-USB) */
 203         if (dev.idVendor == 0x06cd && dev.idProduct == 0x010b)
 204                 return 0;
 205
 206         /*----------------------------------------------------*/
 207
 208         /* "gadget zero", Linux-USB test software */
 209         if (dev.idVendor == 0x0525 && dev.idProduct == 0xa4a0)
 210                 return 0;
 211
 212         /* user mode subset of that */
 213         if (dev.idVendor == 0x0525 && dev.idProduct == 0xa4a4)
 214                 return testdev_ffs_ifnum(fd);
 215                 /* return 0; */
 216
 217         /* iso version of usermode code */
 218         if (dev.idVendor == 0x0525 && dev.idProduct == 0xa4a3)
 219                 return 0;
 220
 221         /* some GPL'd test firmware uses these IDs */
 222
 223         if (dev.idVendor == 0xfff0 && dev.idProduct == 0xfff0)
 224                 return 0;
 225
 226         /*----------------------------------------------------*/
 227
 228         /* iBOT2 high speed webcam */
 229         if (dev.idVendor == 0x0b62 && dev.idProduct == 0x0059)
 230                 return 0;
 231
 232         /*----------------------------------------------------*/
 233
 234         /* the FunctionFS gadget can have the source/sink interface
 235          * anywhere.  We look for an interface descriptor that match
 236          * what we expect.  We ignore configuratiens thou. */
 237
 238         if (dev.idVendor == 0x0525 && dev.idProduct == 0xa4ac
 239          && (dev.bDeviceClass == USB_CLASS_PER_INTERFACE
 240           || dev.bDeviceClass == USB_CLASS_VENDOR_SPEC))
 241                 return testdev_ffs_ifnum(fd);
 242
 243         return -1;
 244 }
 245
 246 static int find_testdev(const char *name, const struct stat *sb, int flag)
 247 {
 248         FILE                            *fd;
 249         int                             ifnum;
 250         struct testdev                  *entry;
 251
 252         (void)sb; /* unused */
 253
 254         if (flag != FTW_F)
 255                 return 0;
 256         /* ignore /proc/bus/usb/{devices,drivers} */
 257         if (strrchr(name, '/')[1] == 'd')
 258                 return 0;
 259
 260         fd = fopen(name, "rb");
 261         if (!fd) {
 262                 perror(name);
 263                 return 0;
 264         }
 265
 266         ifnum = testdev_ifnum(fd);
 267         fclose(fd);
 268         if (ifnum < 0)
 269                 return 0;
 270
 271         entry = calloc(1, sizeof *entry);
 272         if (!entry)
 273                 goto nomem;
 274
 275         entry->name = strdup(name);
 276         if (!entry->name) {
 277                 free(entry);
 278 nomem:
 279                 perror("malloc");
 280                 return 0;
 281         }
 282
 283         entry->ifnum = ifnum;
 284
 285         /* FIXME ask usbfs what speed; update USBDEVFS_CONNECTINFO so
 286          * it tells about high speed etc */
 287
 288         fprintf(stderr, "%s speed\t%s\t%u\n",
 289                 speed(entry->speed), entry->name, entry->ifnum);
 290
 291         entry->next = testdevs;
 292         testdevs = entry;
 293         return 0;
 294 }
 295
 296 static int
 297 usbdev_ioctl (int fd, int ifno, unsigned request, void *param)
 298 {
 299         struct usbdevfs_ioctl   wrapper;
 300
 301         wrapper.ifno = ifno;
 302         wrapper.ioctl_code = request;
 303         wrapper.data = param;
 304
 305         return ioctl (fd, USBDEVFS_IOCTL, &wrapper);
 306 }
 307
 308 static void *handle_testdev (void *arg)
 309 {
 310         struct testdev          *dev = arg;
 311         int                     fd, i;
 312         int                     status;
 313
 314         if ((fd = open (dev->name, O_RDWR)) < 0) {
 315                 perror ("can't open dev file r/w");
 316                 return 0;
 317         }
 318
 319 restart:
 320         for (i = 0; i < TEST_CASES; i++) {
 321                 if (dev->test != -1 && dev->test != i)
 322                         continue;
 323                 dev->param.test_num = i;
 324
 325                 status = usbdev_ioctl (fd, dev->ifnum,
 326                                 USBTEST_REQUEST, &dev->param);
 327                 if (status < 0 && errno == EOPNOTSUPP)
 328                         continue;
 329
 330                 /* FIXME need a "syslog it" option for background testing */
 331
 332                 /* NOTE: each thread emits complete lines; no fragments! */
 333                 if (status < 0) {
 334                         char    buf [80];
 335                         int     err = errno;
 336
 337                         if (strerror_r (errno, buf, sizeof buf)) {
 338                                 snprintf (buf, sizeof buf, "error %d", err);
 339                                 errno = err;
 340                         }
 341                         printf ("%s test %d --> %d (%s)\n",
 342                                 dev->name, i, errno, buf);
 343                 } else
 344                         printf ("%s test %d, %4d.%.06d secs\n", dev->name, i,
 345                                 (int) dev->param.duration.tv_sec,
 346                                 (int) dev->param.duration.tv_usec);
 347
 348                 fflush (stdout);
 349         }
 350         if (dev->forever)
 351                 goto restart;
 352
 353         close (fd);
 354         return arg;
 355 }
 356
 357 static const char *usbfs_dir_find(void)
 358 {
 359         static char usbfs_path_0[] = "/dev/usb/devices";
 360         static char usbfs_path_1[] = "/proc/bus/usb/devices";
 361         static char udev_usb_path[] = "/dev/bus/usb";
 362
 363         static char *const usbfs_paths[] = {
 364                 usbfs_path_0, usbfs_path_1
 365         };
 366
 367         static char *const *
 368                 end = usbfs_paths + sizeof usbfs_paths / sizeof *usbfs_paths;
 369
 370         char *const *it = usbfs_paths;
 371         do {
 372                 int fd = open(*it, O_RDONLY);
 373                 close(fd);
 374                 if (fd >= 0) {
 375                         strrchr(*it, '/')[0] = '\0';
 376                         return *it;
 377                 }
 378         } while (++it != end);
 379
 380         /* real device-nodes managed by udev */
 381         if (access(udev_usb_path, F_OK) == 0)
 382                 return udev_usb_path;
 383
 384         return NULL;
 385 }
 386
 387 static int parse_num(unsigned *num, const char *str)
 388 {
 389         unsigned long val;
 390         char *end;
 391
 392         errno = 0;
 393         val = strtoul(str, &end, 0);
 394         if (errno || *end || val > UINT_MAX)
 395                 return -1;
 396         *num = val;
 397         return 0;
 398 }
 399
 400 int main (int argc, char **argv)
 401 {
 402
 403         int                     c;
 404         struct testdev          *entry;
 405         char                    *device;
 406         const char              *usbfs_dir = NULL;
 407         int                     all = 0, forever = 0, not = 0;
 408         int                     test = -1 /* all */;
 409         struct usbtest_param    param;
 410
 411         /* pick defaults that works with all speeds, without short packets.
 412          *
 413          * Best per-frame data rates:
 414          *     high speed, bulk       512 * 13 * 8 = 53248
 415          *                 interrupt 1024 *  3 * 8 = 24576
 416          *     full speed, bulk/intr   64 * 19     =  1216
 417          *                 interrupt   64 *  1     =    64
 418          *      low speed, interrupt    8 *  1     =     8
 419          */
 420         param.iterations = 1000;
 421         param.length = 512;
 422         param.vary = 512;
 423         param.sglen = 32;
 424
 425         /* for easy use when hotplugging */
 426         device = getenv ("DEVICE");
 427
 428         while ((c = getopt (argc, argv, "D:aA:c:g:hns:t:v:")) != EOF)
 429         switch (c) {
 430         case 'D':       /* device, if only one */
 431                 device = optarg;
 432                 continue;
 433         case 'A':       /* use all devices with specified usbfs dir */
 434                 usbfs_dir = optarg;
 435                 /* FALL THROUGH */
 436         case 'a':       /* use all devices */
 437                 device = NULL;
 438                 all = 1;
 439                 continue;
 440         case 'c':       /* count iterations */
 441                 if (parse_num(&param.iterations, optarg))
 442                         goto usage;
 443                 continue;
 444         case 'g':       /* scatter/gather entries */
 445                 if (parse_num(&param.sglen, optarg))
 446                         goto usage;
 447                 continue;
 448         case 'l':       /* loop forever */
 449                 forever = 1;
 450                 continue;
 451         case 'n':       /* no test running! */
 452                 not = 1;
 453                 continue;
 454         case 's':       /* size of packet */
 455                 if (parse_num(&param.length, optarg))
 456                         goto usage;
 457                 continue;
 458         case 't':       /* run just one test */
 459                 test = atoi (optarg);
 460                 if (test < 0)
 461                         goto usage;
 462                 continue;
 463         case 'v':       /* vary packet size by ... */
 464                 if (parse_num(&param.vary, optarg))
 465                         goto usage;
 466                 continue;
 467         case '?':
 468         case 'h':
 469         default:
 470 usage:
 471                 fprintf (stderr, "usage: %s [-n] [-D dev | -a | -A usbfs-dir]\n"
 472                         "\t[-c iterations]  [-t testnum]\n"
 473                         "\t[-s packetsize] [-g sglen] [-v vary]\n",
 474                         argv [0]);
 475                 return 1;
 476         }
 477         if (optind != argc)
 478                 goto usage;
 479         if (!all && !device) {
 480                 fprintf (stderr, "must specify '-a' or '-D dev', "
 481                         "or DEVICE=/proc/bus/usb/BBB/DDD in env\n");
 482                 goto usage;
 483         }
 484
 485         /* Find usbfs mount point */
 486         if (!usbfs_dir) {
 487                 usbfs_dir = usbfs_dir_find();
 488                 if (!usbfs_dir) {
 489                         fputs ("usbfs files are missing\n", stderr);
 490                         return -1;
 491                 }
 492         }
 493
 494         /* collect and list the test devices */
 495         if (ftw (usbfs_dir, find_testdev, 3) != 0) {
 496                 fputs ("ftw failed; is usbfs missing?\n", stderr);
 497                 return -1;
 498         }
 499
 500         /* quit, run single test, or create test threads */
 501         if (!testdevs && !device) {
 502                 fputs ("no test devices recognized\n", stderr);
 503                 return -1;
 504         }
 505         if (not)
 506                 return 0;
 507         if (testdevs && testdevs->next == 0 && !device)
 508                 device = testdevs->name;
 509         for (entry = testdevs; entry; entry = entry->next) {
 510                 int     status;
 511
 512                 entry->param = param;
 513                 entry->forever = forever;
 514                 entry->test = test;
 515
 516                 if (device) {
 517                         if (strcmp (entry->name, device))
 518                                 continue;
 519                         return handle_testdev (entry) != entry;
 520                 }
 521                 status = pthread_create (&entry->thread, 0, handle_testdev, entry);
 522                 if (status) {
 523                         perror ("pthread_create");
 524                         continue;
 525                 }
 526         }
 527         if (device) {
 528                 struct testdev          dev;
 529
 530                 /* kernel can recognize test devices we don't */
 531                 fprintf (stderr, "%s: %s may see only control tests\n",
 532                                 argv [0], device);
 533
 534                 memset (&dev, 0, sizeof dev);
 535                 dev.name = device;
 536                 dev.param = param;
 537                 dev.forever = forever;
 538                 dev.test = test;
 539                 return handle_testdev (&dev) != &dev;
 540         }
 541
 542         /* wait for tests to complete */
 543         for (entry = testdevs; entry; entry = entry->next) {
 544                 void    *retval;
 545
 546                 if (pthread_join (entry->thread, &retval))
 547                         perror ("pthread_join");
 548                 /* testing errors discarded! */
 549         }
 550
 551         return 0;
 552 }