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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
55struct 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
79struct 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
96struct 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
109enum 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
117static 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
128struct 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};
139static struct testdev *testdevs;
140
141static 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
164static 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
246static 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);
278nomem:
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
296static int
297usbdev_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
308static 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
319restart:
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
357static 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
387static 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
400int 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(¶m.iterations, optarg))
442 goto usage;
443 continue;
444 case 'g': /* scatter/gather entries */
445 if (parse_num(¶m.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(¶m.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(¶m.vary, optarg))
465 goto usage;
466 continue;
467 case '?':
468 case 'h':
469 default:
470usage:
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}