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1/*
2 * ffs-test.c.c -- user mode filesystem api for usb composite function
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 * Author: Michal Nazarewicz <mina86@mina86.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22/* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */
23
24
25#define _BSD_SOURCE /* for endian.h */
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/******************** Little Endian Handling ********************************/
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/******************** Messages and Errors ***********************************/
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/******************** Descriptors and Strings *******************************/
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 /* .wMaxPacketSize = autoconfiguration (kernel) */
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 /* .wMaxPacketSize = autoconfiguration (kernel) */
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, /* NAK every 1 uframe */
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), /* en-us */
189 STR_INTERFACE_,
190 },
191};
192
193#define STR_INTERFACE strings.lang0.str1
194
195
196/******************** Files and Threads Handling ****************************/
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 /* test the FIFO ioctls (non-ep0 code paths) */
263 if (t != threads) {
264 ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS);
265 if (ret < 0) {
266 /* ENODEV reported after disconnect */
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 /* nop */
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/******************** Empty/Fill buffer routines ****************************/
359
360/* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */
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/******************** Endpoints routines ************************************/
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/******************** Main **************************************************/
505
506int main(void)
507{
508 unsigned i;
509
510 /* XXX TODO: Argument parsing missing */
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}
1/*
2 * ffs-test.c.c -- user mode filesystem api for usb composite function
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 * Author: Michal Nazarewicz <m.nazarewicz@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22/* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */
23
24
25#define _BSD_SOURCE /* for endian.h */
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
40#include "../../include/linux/usb/functionfs.h"
41
42
43/******************** Little Endian Handling ********************************/
44
45#define cpu_to_le16(x) htole16(x)
46#define cpu_to_le32(x) htole32(x)
47#define le32_to_cpu(x) le32toh(x)
48#define le16_to_cpu(x) le16toh(x)
49
50static inline __u16 get_unaligned_le16(const void *_ptr)
51{
52 const __u8 *ptr = _ptr;
53 return ptr[0] | (ptr[1] << 8);
54}
55
56static inline __u32 get_unaligned_le32(const void *_ptr)
57{
58 const __u8 *ptr = _ptr;
59 return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24);
60}
61
62static inline void put_unaligned_le16(__u16 val, void *_ptr)
63{
64 __u8 *ptr = _ptr;
65 *ptr++ = val;
66 *ptr++ = val >> 8;
67}
68
69static inline void put_unaligned_le32(__u32 val, void *_ptr)
70{
71 __u8 *ptr = _ptr;
72 *ptr++ = val;
73 *ptr++ = val >> 8;
74 *ptr++ = val >> 16;
75 *ptr++ = val >> 24;
76}
77
78
79/******************** Messages and Errors ***********************************/
80
81static const char argv0[] = "ffs-test";
82
83static unsigned verbosity = 7;
84
85static void _msg(unsigned level, const char *fmt, ...)
86{
87 if (level < 2)
88 level = 2;
89 else if (level > 7)
90 level = 7;
91
92 if (level <= verbosity) {
93 static const char levels[8][6] = {
94 [2] = "crit:",
95 [3] = "err: ",
96 [4] = "warn:",
97 [5] = "note:",
98 [6] = "info:",
99 [7] = "dbg: "
100 };
101
102 int _errno = errno;
103 va_list ap;
104
105 fprintf(stderr, "%s: %s ", argv0, levels[level]);
106 va_start(ap, fmt);
107 vfprintf(stderr, fmt, ap);
108 va_end(ap);
109
110 if (fmt[strlen(fmt) - 1] != '\n') {
111 char buffer[128];
112 strerror_r(_errno, buffer, sizeof buffer);
113 fprintf(stderr, ": (-%d) %s\n", _errno, buffer);
114 }
115
116 fflush(stderr);
117 }
118}
119
120#define die(...) (_msg(2, __VA_ARGS__), exit(1))
121#define err(...) _msg(3, __VA_ARGS__)
122#define warn(...) _msg(4, __VA_ARGS__)
123#define note(...) _msg(5, __VA_ARGS__)
124#define info(...) _msg(6, __VA_ARGS__)
125#define debug(...) _msg(7, __VA_ARGS__)
126
127#define die_on(cond, ...) do { \
128 if (cond) \
129 die(__VA_ARGS__); \
130 } while (0)
131
132
133/******************** Descriptors and Strings *******************************/
134
135static const struct {
136 struct usb_functionfs_descs_head header;
137 struct {
138 struct usb_interface_descriptor intf;
139 struct usb_endpoint_descriptor_no_audio sink;
140 struct usb_endpoint_descriptor_no_audio source;
141 } __attribute__((packed)) fs_descs, hs_descs;
142} __attribute__((packed)) descriptors = {
143 .header = {
144 .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC),
145 .length = cpu_to_le32(sizeof descriptors),
146 .fs_count = 3,
147 .hs_count = 3,
148 },
149 .fs_descs = {
150 .intf = {
151 .bLength = sizeof descriptors.fs_descs.intf,
152 .bDescriptorType = USB_DT_INTERFACE,
153 .bNumEndpoints = 2,
154 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
155 .iInterface = 1,
156 },
157 .sink = {
158 .bLength = sizeof descriptors.fs_descs.sink,
159 .bDescriptorType = USB_DT_ENDPOINT,
160 .bEndpointAddress = 1 | USB_DIR_IN,
161 .bmAttributes = USB_ENDPOINT_XFER_BULK,
162 /* .wMaxPacketSize = autoconfiguration (kernel) */
163 },
164 .source = {
165 .bLength = sizeof descriptors.fs_descs.source,
166 .bDescriptorType = USB_DT_ENDPOINT,
167 .bEndpointAddress = 2 | USB_DIR_OUT,
168 .bmAttributes = USB_ENDPOINT_XFER_BULK,
169 /* .wMaxPacketSize = autoconfiguration (kernel) */
170 },
171 },
172 .hs_descs = {
173 .intf = {
174 .bLength = sizeof descriptors.fs_descs.intf,
175 .bDescriptorType = USB_DT_INTERFACE,
176 .bNumEndpoints = 2,
177 .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
178 .iInterface = 1,
179 },
180 .sink = {
181 .bLength = sizeof descriptors.hs_descs.sink,
182 .bDescriptorType = USB_DT_ENDPOINT,
183 .bEndpointAddress = 1 | USB_DIR_IN,
184 .bmAttributes = USB_ENDPOINT_XFER_BULK,
185 .wMaxPacketSize = cpu_to_le16(512),
186 },
187 .source = {
188 .bLength = sizeof descriptors.hs_descs.source,
189 .bDescriptorType = USB_DT_ENDPOINT,
190 .bEndpointAddress = 2 | USB_DIR_OUT,
191 .bmAttributes = USB_ENDPOINT_XFER_BULK,
192 .wMaxPacketSize = cpu_to_le16(512),
193 .bInterval = 1, /* NAK every 1 uframe */
194 },
195 },
196};
197
198
199#define STR_INTERFACE_ "Source/Sink"
200
201static const struct {
202 struct usb_functionfs_strings_head header;
203 struct {
204 __le16 code;
205 const char str1[sizeof STR_INTERFACE_];
206 } __attribute__((packed)) lang0;
207} __attribute__((packed)) strings = {
208 .header = {
209 .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC),
210 .length = cpu_to_le32(sizeof strings),
211 .str_count = cpu_to_le32(1),
212 .lang_count = cpu_to_le32(1),
213 },
214 .lang0 = {
215 cpu_to_le16(0x0409), /* en-us */
216 STR_INTERFACE_,
217 },
218};
219
220#define STR_INTERFACE strings.lang0.str1
221
222
223/******************** Files and Threads Handling ****************************/
224
225struct thread;
226
227static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes);
228static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes);
229static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes);
230static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes);
231static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes);
232
233
234static struct thread {
235 const char *const filename;
236 size_t buf_size;
237
238 ssize_t (*in)(struct thread *, void *, size_t);
239 const char *const in_name;
240
241 ssize_t (*out)(struct thread *, const void *, size_t);
242 const char *const out_name;
243
244 int fd;
245 pthread_t id;
246 void *buf;
247 ssize_t status;
248} threads[] = {
249 {
250 "ep0", 4 * sizeof(struct usb_functionfs_event),
251 read_wrap, NULL,
252 ep0_consume, "<consume>",
253 0, 0, NULL, 0
254 },
255 {
256 "ep1", 8 * 1024,
257 fill_in_buf, "<in>",
258 write_wrap, NULL,
259 0, 0, NULL, 0
260 },
261 {
262 "ep2", 8 * 1024,
263 read_wrap, NULL,
264 empty_out_buf, "<out>",
265 0, 0, NULL, 0
266 },
267};
268
269
270static void init_thread(struct thread *t)
271{
272 t->buf = malloc(t->buf_size);
273 die_on(!t->buf, "malloc");
274
275 t->fd = open(t->filename, O_RDWR);
276 die_on(t->fd < 0, "%s", t->filename);
277}
278
279static void cleanup_thread(void *arg)
280{
281 struct thread *t = arg;
282 int ret, fd;
283
284 fd = t->fd;
285 if (t->fd < 0)
286 return;
287 t->fd = -1;
288
289 /* test the FIFO ioctls (non-ep0 code paths) */
290 if (t != threads) {
291 ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS);
292 if (ret < 0) {
293 /* ENODEV reported after disconnect */
294 if (errno != ENODEV)
295 err("%s: get fifo status", t->filename);
296 } else if (ret) {
297 warn("%s: unclaimed = %d\n", t->filename, ret);
298 if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0)
299 err("%s: fifo flush", t->filename);
300 }
301 }
302
303 if (close(fd) < 0)
304 err("%s: close", t->filename);
305
306 free(t->buf);
307 t->buf = NULL;
308}
309
310static void *start_thread_helper(void *arg)
311{
312 const char *name, *op, *in_name, *out_name;
313 struct thread *t = arg;
314 ssize_t ret;
315
316 info("%s: starts\n", t->filename);
317 in_name = t->in_name ? t->in_name : t->filename;
318 out_name = t->out_name ? t->out_name : t->filename;
319
320 pthread_cleanup_push(cleanup_thread, arg);
321
322 for (;;) {
323 pthread_testcancel();
324
325 ret = t->in(t, t->buf, t->buf_size);
326 if (ret > 0) {
327 ret = t->out(t, t->buf, t->buf_size);
328 name = out_name;
329 op = "write";
330 } else {
331 name = in_name;
332 op = "read";
333 }
334
335 if (ret > 0) {
336 /* nop */
337 } else if (!ret) {
338 debug("%s: %s: EOF", name, op);
339 break;
340 } else if (errno == EINTR || errno == EAGAIN) {
341 debug("%s: %s", name, op);
342 } else {
343 warn("%s: %s", name, op);
344 break;
345 }
346 }
347
348 pthread_cleanup_pop(1);
349
350 t->status = ret;
351 info("%s: ends\n", t->filename);
352 return NULL;
353}
354
355static void start_thread(struct thread *t)
356{
357 debug("%s: starting\n", t->filename);
358
359 die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0,
360 "pthread_create(%s)", t->filename);
361}
362
363static void join_thread(struct thread *t)
364{
365 int ret = pthread_join(t->id, NULL);
366
367 if (ret < 0)
368 err("%s: joining thread", t->filename);
369 else
370 debug("%s: joined\n", t->filename);
371}
372
373
374static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes)
375{
376 return read(t->fd, buf, nbytes);
377}
378
379static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes)
380{
381 return write(t->fd, buf, nbytes);
382}
383
384
385/******************** Empty/Fill buffer routines ****************************/
386
387/* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */
388enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE };
389static enum pattern pattern;
390
391static ssize_t
392fill_in_buf(struct thread *ignore, void *buf, size_t nbytes)
393{
394 size_t i;
395 __u8 *p;
396
397 (void)ignore;
398
399 switch (pattern) {
400 case PAT_ZERO:
401 memset(buf, 0, nbytes);
402 break;
403
404 case PAT_SEQ:
405 for (p = buf, i = 0; i < nbytes; ++i, ++p)
406 *p = i % 63;
407 break;
408
409 case PAT_PIPE:
410 return fread(buf, 1, nbytes, stdin);
411 }
412
413 return nbytes;
414}
415
416static ssize_t
417empty_out_buf(struct thread *ignore, const void *buf, size_t nbytes)
418{
419 const __u8 *p;
420 __u8 expected;
421 ssize_t ret;
422 size_t len;
423
424 (void)ignore;
425
426 switch (pattern) {
427 case PAT_ZERO:
428 expected = 0;
429 for (p = buf, len = 0; len < nbytes; ++p, ++len)
430 if (*p)
431 goto invalid;
432 break;
433
434 case PAT_SEQ:
435 for (p = buf, len = 0; len < nbytes; ++p, ++len)
436 if (*p != len % 63) {
437 expected = len % 63;
438 goto invalid;
439 }
440 break;
441
442 case PAT_PIPE:
443 ret = fwrite(buf, nbytes, 1, stdout);
444 if (ret > 0)
445 fflush(stdout);
446 break;
447
448invalid:
449 err("bad OUT byte %zd, expected %02x got %02x\n",
450 len, expected, *p);
451 for (p = buf, len = 0; len < nbytes; ++p, ++len) {
452 if (0 == (len % 32))
453 fprintf(stderr, "%4zd:", len);
454 fprintf(stderr, " %02x", *p);
455 if (31 == (len % 32))
456 fprintf(stderr, "\n");
457 }
458 fflush(stderr);
459 errno = EILSEQ;
460 return -1;
461 }
462
463 return len;
464}
465
466
467/******************** Endpoints routines ************************************/
468
469static void handle_setup(const struct usb_ctrlrequest *setup)
470{
471 printf("bRequestType = %d\n", setup->bRequestType);
472 printf("bRequest = %d\n", setup->bRequest);
473 printf("wValue = %d\n", le16_to_cpu(setup->wValue));
474 printf("wIndex = %d\n", le16_to_cpu(setup->wIndex));
475 printf("wLength = %d\n", le16_to_cpu(setup->wLength));
476}
477
478static ssize_t
479ep0_consume(struct thread *ignore, const void *buf, size_t nbytes)
480{
481 static const char *const names[] = {
482 [FUNCTIONFS_BIND] = "BIND",
483 [FUNCTIONFS_UNBIND] = "UNBIND",
484 [FUNCTIONFS_ENABLE] = "ENABLE",
485 [FUNCTIONFS_DISABLE] = "DISABLE",
486 [FUNCTIONFS_SETUP] = "SETUP",
487 [FUNCTIONFS_SUSPEND] = "SUSPEND",
488 [FUNCTIONFS_RESUME] = "RESUME",
489 };
490
491 const struct usb_functionfs_event *event = buf;
492 size_t n;
493
494 (void)ignore;
495
496 for (n = nbytes / sizeof *event; n; --n, ++event)
497 switch (event->type) {
498 case FUNCTIONFS_BIND:
499 case FUNCTIONFS_UNBIND:
500 case FUNCTIONFS_ENABLE:
501 case FUNCTIONFS_DISABLE:
502 case FUNCTIONFS_SETUP:
503 case FUNCTIONFS_SUSPEND:
504 case FUNCTIONFS_RESUME:
505 printf("Event %s\n", names[event->type]);
506 if (event->type == FUNCTIONFS_SETUP)
507 handle_setup(&event->u.setup);
508 break;
509
510 default:
511 printf("Event %03u (unknown)\n", event->type);
512 }
513
514 return nbytes;
515}
516
517static void ep0_init(struct thread *t)
518{
519 ssize_t ret;
520
521 info("%s: writing descriptors\n", t->filename);
522 ret = write(t->fd, &descriptors, sizeof descriptors);
523 die_on(ret < 0, "%s: write: descriptors", t->filename);
524
525 info("%s: writing strings\n", t->filename);
526 ret = write(t->fd, &strings, sizeof strings);
527 die_on(ret < 0, "%s: write: strings", t->filename);
528}
529
530
531/******************** Main **************************************************/
532
533int main(void)
534{
535 unsigned i;
536
537 /* XXX TODO: Argument parsing missing */
538
539 init_thread(threads);
540 ep0_init(threads);
541
542 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
543 init_thread(threads + i);
544
545 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
546 start_thread(threads + i);
547
548 start_thread_helper(threads);
549
550 for (i = 1; i < sizeof threads / sizeof *threads; ++i)
551 join_thread(threads + i);
552
553 return 0;
554}