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25#define _BSD_SOURCE
26
27#include <endian.h>
28#include <errno.h>
29#include <fcntl.h>
30#include <pthread.h>
31#include <stdarg.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <sys/ioctl.h>
36#include <sys/stat.h>
37#include <sys/types.h>
38#include <unistd.h>
39#include <tools/le_byteshift.h>
40
41#include "../../include/uapi/linux/usb/functionfs.h"
42
43
44
45
46#define cpu_to_le16(x) htole16(x)
47#define cpu_to_le32(x) htole32(x)
48#define le32_to_cpu(x) le32toh(x)
49#define le16_to_cpu(x) le16toh(x)
50
51
52
53
54static const char argv0[] = "ffs-test";
55
56static unsigned verbosity = 7;
57
58static void _msg(unsigned level, const char *fmt, ...)
59{
60 if (level < 2)
61 level = 2;
62 else if (level > 7)
63 level = 7;
64
65 if (level <= verbosity) {
66 static const char levels[8][6] = {
67 [2] = "crit:",
68 [3] = "err: ",
69 [4] = "warn:",
70 [5] = "note:",
71 [6] = "info:",
72 [7] = "dbg: "
73 };
74
75 int _errno = errno;
76 va_list ap;
77
78 fprintf(stderr, "%s: %s ", argv0, levels[level]);
79 va_start(ap, fmt);
80 vfprintf(stderr, fmt, ap);
81 va_end(ap);
82
83 if (fmt[strlen(fmt) - 1] != '\n') {
84 char buffer[128];
85 strerror_r(_errno, buffer, sizeof buffer);
86 fprintf(stderr, ": (-%d) %s\n", _errno, buffer);
87 }
88
89 fflush(stderr);
90 }
91}
92
93#define die(...) (_msg(2, __VA_ARGS__), exit(1))
94#define err(...) _msg(3, __VA_ARGS__)
95#define warn(...) _msg(4, __VA_ARGS__)
96#define note(...) _msg(5, __VA_ARGS__)
97#define info(...) _msg(6, __VA_ARGS__)
98#define debug(...) _msg(7, __VA_ARGS__)
99
100#define die_on(cond, ...) do { \
101 if (cond) \
102 die(__VA_ARGS__); \
103 } while (0)
104
105
106
107
108static const struct {
109 struct usb_functionfs_descs_head header;
110 struct {
111 struct usb_interface_descriptor intf;
112 struct usb_endpoint_descriptor_no_audio sink;
113 struct usb_endpoint_descriptor_no_audio source;
114 } __attribute__((packed)) fs_descs, hs_descs;
115} __attribute__((packed)) descriptors = {
116 .header = {
117 .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC),
118 .length = cpu_to_le32(sizeof descriptors),
119 .fs_count = 3,
120 .hs_count = 3,
121 },
122 .fs_descs = {
123 .intf = {
124 .bLength = sizeof descriptors.fs_descs.intf,
125 .bDescriptorType = USB_DT_INTERFACE,
126 .bNumEndpoints = 2,
127 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
128 .iInterface = 1,
129 },
130 .sink = {
131 .bLength = sizeof descriptors.fs_descs.sink,
132 .bDescriptorType = USB_DT_ENDPOINT,
133 .bEndpointAddress = 1 | USB_DIR_IN,
134 .bmAttributes = USB_ENDPOINT_XFER_BULK,
135
136 },
137 .source = {
138 .bLength = sizeof descriptors.fs_descs.source,
139 .bDescriptorType = USB_DT_ENDPOINT,
140 .bEndpointAddress = 2 | USB_DIR_OUT,
141 .bmAttributes = USB_ENDPOINT_XFER_BULK,
142
143 },
144 },
145 .hs_descs = {
146 .intf = {
147 .bLength = sizeof descriptors.fs_descs.intf,
148 .bDescriptorType = USB_DT_INTERFACE,
149 .bNumEndpoints = 2,
150 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
151 .iInterface = 1,
152 },
153 .sink = {
154 .bLength = sizeof descriptors.hs_descs.sink,
155 .bDescriptorType = USB_DT_ENDPOINT,
156 .bEndpointAddress = 1 | USB_DIR_IN,
157 .bmAttributes = USB_ENDPOINT_XFER_BULK,
158 .wMaxPacketSize = cpu_to_le16(512),
159 },
160 .source = {
161 .bLength = sizeof descriptors.hs_descs.source,
162 .bDescriptorType = USB_DT_ENDPOINT,
163 .bEndpointAddress = 2 | USB_DIR_OUT,
164 .bmAttributes = USB_ENDPOINT_XFER_BULK,
165 .wMaxPacketSize = cpu_to_le16(512),
166 .bInterval = 1,
167 },
168 },
169};
170
171
172#define STR_INTERFACE_ "Source/Sink"
173
174static const struct {
175 struct usb_functionfs_strings_head header;
176 struct {
177 __le16 code;
178 const char str1[sizeof STR_INTERFACE_];
179 } __attribute__((packed)) lang0;
180} __attribute__((packed)) strings = {
181 .header = {
182 .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC),
183 .length = cpu_to_le32(sizeof strings),
184 .str_count = cpu_to_le32(1),
185 .lang_count = cpu_to_le32(1),
186 },
187 .lang0 = {
188 cpu_to_le16(0x0409),
189 STR_INTERFACE_,
190 },
191};
192
193#define STR_INTERFACE strings.lang0.str1
194
195
196
197
198struct thread;
199
200static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes);
201static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes);
202static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes);
203static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes);
204static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes);
205
206
207static struct thread {
208 const char *const filename;
209 size_t buf_size;
210
211 ssize_t (*in)(struct thread *, void *, size_t);
212 const char *const in_name;
213
214 ssize_t (*out)(struct thread *, const void *, size_t);
215 const char *const out_name;
216
217 int fd;
218 pthread_t id;
219 void *buf;
220 ssize_t status;
221} threads[] = {
222 {
223 "ep0", 4 * sizeof(struct usb_functionfs_event),
224 read_wrap, NULL,
225 ep0_consume, "<consume>",
226 0, 0, NULL, 0
227 },
228 {
229 "ep1", 8 * 1024,
230 fill_in_buf, "<in>",
231 write_wrap, NULL,
232 0, 0, NULL, 0
233 },
234 {
235 "ep2", 8 * 1024,
236 read_wrap, NULL,
237 empty_out_buf, "<out>",
238 0, 0, NULL, 0
239 },
240};
241
242
243static void init_thread(struct thread *t)
244{
245 t->buf = malloc(t->buf_size);
246 die_on(!t->buf, "malloc");
247
248 t->fd = open(t->filename, O_RDWR);
249 die_on(t->fd < 0, "%s", t->filename);
250}
251
252static void cleanup_thread(void *arg)
253{
254 struct thread *t = arg;
255 int ret, fd;
256
257 fd = t->fd;
258 if (t->fd < 0)
259 return;
260 t->fd = -1;
261
262
263 if (t != threads) {
264 ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS);
265 if (ret < 0) {
266
267 if (errno != ENODEV)
268 err("%s: get fifo status", t->filename);
269 } else if (ret) {
270 warn("%s: unclaimed = %d\n", t->filename, ret);
271 if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0)
272 err("%s: fifo flush", t->filename);
273 }
274 }
275
276 if (close(fd) < 0)
277 err("%s: close", t->filename);
278
279 free(t->buf);
280 t->buf = NULL;
281}
282
283static void *start_thread_helper(void *arg)
284{
285 const char *name, *op, *in_name, *out_name;
286 struct thread *t = arg;
287 ssize_t ret;
288
289 info("%s: starts\n", t->filename);
290 in_name = t->in_name ? t->in_name : t->filename;
291 out_name = t->out_name ? t->out_name : t->filename;
292
293 pthread_cleanup_push(cleanup_thread, arg);
294
295 for (;;) {
296 pthread_testcancel();
297
298 ret = t->in(t, t->buf, t->buf_size);
299 if (ret > 0) {
300 ret = t->out(t, t->buf, ret);
301 name = out_name;
302 op = "write";
303 } else {
304 name = in_name;
305 op = "read";
306 }
307
308 if (ret > 0) {
309
310 } else if (!ret) {
311 debug("%s: %s: EOF", name, op);
312 break;
313 } else if (errno == EINTR || errno == EAGAIN) {
314 debug("%s: %s", name, op);
315 } else {
316 warn("%s: %s", name, op);
317 break;
318 }
319 }
320
321 pthread_cleanup_pop(1);
322
323 t->status = ret;
324 info("%s: ends\n", t->filename);
325 return NULL;
326}
327
328static void start_thread(struct thread *t)
329{
330 debug("%s: starting\n", t->filename);
331
332 die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0,
333 "pthread_create(%s)", t->filename);
334}
335
336static void join_thread(struct thread *t)
337{
338 int ret = pthread_join(t->id, NULL);
339
340 if (ret < 0)
341 err("%s: joining thread", t->filename);
342 else
343 debug("%s: joined\n", t->filename);
344}
345
346
347static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes)
348{
349 return read(t->fd, buf, nbytes);
350}
351
352static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes)
353{
354 return write(t->fd, buf, nbytes);
355}
356
357
358
359
360
361enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE };
362static enum pattern pattern;
363
364static ssize_t
365fill_in_buf(struct thread *ignore, void *buf, size_t nbytes)
366{
367 size_t i;
368 __u8 *p;
369
370 (void)ignore;
371
372 switch (pattern) {
373 case PAT_ZERO:
374 memset(buf, 0, nbytes);
375 break;
376
377 case PAT_SEQ:
378 for (p = buf, i = 0; i < nbytes; ++i, ++p)
379 *p = i % 63;
380 break;
381
382 case PAT_PIPE:
383 return fread(buf, 1, nbytes, stdin);
384 }
385
386 return nbytes;
387}
388
389static ssize_t
390empty_out_buf(struct thread *ignore, const void *buf, size_t nbytes)
391{
392 const __u8 *p;
393 __u8 expected;
394 ssize_t ret;
395 size_t len;
396
397 (void)ignore;
398
399 switch (pattern) {
400 case PAT_ZERO:
401 expected = 0;
402 for (p = buf, len = 0; len < nbytes; ++p, ++len)
403 if (*p)
404 goto invalid;
405 break;
406
407 case PAT_SEQ:
408 for (p = buf, len = 0; len < nbytes; ++p, ++len)
409 if (*p != len % 63) {
410 expected = len % 63;
411 goto invalid;
412 }
413 break;
414
415 case PAT_PIPE:
416 ret = fwrite(buf, nbytes, 1, stdout);
417 if (ret > 0)
418 fflush(stdout);
419 break;
420
421invalid:
422 err("bad OUT byte %zd, expected %02x got %02x\n",
423 len, expected, *p);
424 for (p = buf, len = 0; len < nbytes; ++p, ++len) {
425 if (0 == (len % 32))
426 fprintf(stderr, "%4zd:", len);
427 fprintf(stderr, " %02x", *p);
428 if (31 == (len % 32))
429 fprintf(stderr, "\n");
430 }
431 fflush(stderr);
432 errno = EILSEQ;
433 return -1;
434 }
435
436 return len;
437}
438
439
440
441
442static void handle_setup(const struct usb_ctrlrequest *setup)
443{
444 printf("bRequestType = %d\n", setup->bRequestType);
445 printf("bRequest = %d\n", setup->bRequest);
446 printf("wValue = %d\n", le16_to_cpu(setup->wValue));
447 printf("wIndex = %d\n", le16_to_cpu(setup->wIndex));
448 printf("wLength = %d\n", le16_to_cpu(setup->wLength));
449}
450
451static ssize_t
452ep0_consume(struct thread *ignore, const void *buf, size_t nbytes)
453{
454 static const char *const names[] = {
455 [FUNCTIONFS_BIND] = "BIND",
456 [FUNCTIONFS_UNBIND] = "UNBIND",
457 [FUNCTIONFS_ENABLE] = "ENABLE",
458 [FUNCTIONFS_DISABLE] = "DISABLE",
459 [FUNCTIONFS_SETUP] = "SETUP",
460 [FUNCTIONFS_SUSPEND] = "SUSPEND",
461 [FUNCTIONFS_RESUME] = "RESUME",
462 };
463
464 const struct usb_functionfs_event *event = buf;
465 size_t n;
466
467 (void)ignore;
468
469 for (n = nbytes / sizeof *event; n; --n, ++event)
470 switch (event->type) {
471 case FUNCTIONFS_BIND:
472 case FUNCTIONFS_UNBIND:
473 case FUNCTIONFS_ENABLE:
474 case FUNCTIONFS_DISABLE:
475 case FUNCTIONFS_SETUP:
476 case FUNCTIONFS_SUSPEND:
477 case FUNCTIONFS_RESUME:
478 printf("Event %s\n", names[event->type]);
479 if (event->type == FUNCTIONFS_SETUP)
480 handle_setup(&event->u.setup);
481 break;
482
483 default:
484 printf("Event %03u (unknown)\n", event->type);
485 }
486
487 return nbytes;
488}
489
490static void ep0_init(struct thread *t)
491{
492 ssize_t ret;
493
494 info("%s: writing descriptors\n", t->filename);
495 ret = write(t->fd, &descriptors, sizeof descriptors);
496 die_on(ret < 0, "%s: write: descriptors", t->filename);
497
498 info("%s: writing strings\n", t->filename);
499 ret = write(t->fd, &strings, sizeof strings);
500 die_on(ret < 0, "%s: write: strings", t->filename);
501}
502
503
504
505
506int main(void)
507{
508 unsigned i;
509
510
511
512 init_thread(threads);
513 ep0_init(threads);
514
515 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
516 init_thread(threads + i);
517
518 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
519 start_thread(threads + i);
520
521 start_thread_helper(threads);
522
523 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
524 join_thread(threads + i);
525
526 return 0;
527}
528
