Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 2 | /* |
Michal Nazarewicz | 51c208c | 2014-08-27 22:58:46 +0200 | [diff] [blame] | 3 | * ffs-test.c -- user mode filesystem api for usb composite function |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 2010 Samsung Electronics |
Michal Nazarewicz | 54b8360 | 2012-01-13 15:05:16 +0100 | [diff] [blame] | 6 | * Author: Michal Nazarewicz <mina86@mina86.com> |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | /* $(CROSS_COMPILE)cc -Wall -Wextra -g -o ffs-test ffs-test.c -lpthread */ |
| 10 | |
| 11 | |
Felipe Balbi | 5abb9b9 | 2017-01-17 15:04:07 +0200 | [diff] [blame] | 12 | #define _DEFAULT_SOURCE /* for endian.h */ |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 13 | |
| 14 | #include <endian.h> |
| 15 | #include <errno.h> |
| 16 | #include <fcntl.h> |
| 17 | #include <pthread.h> |
| 18 | #include <stdarg.h> |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 19 | #include <stdbool.h> |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <sys/ioctl.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <unistd.h> |
Matt Fleming | 24fa9a9 | 2012-02-28 13:37:25 +0000 | [diff] [blame] | 27 | #include <tools/le_byteshift.h> |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 28 | |
Maxin B. John | a0f11ac | 2013-02-21 01:57:51 +0200 | [diff] [blame] | 29 | #include "../../include/uapi/linux/usb/functionfs.h" |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 30 | |
| 31 | |
| 32 | /******************** Little Endian Handling ********************************/ |
| 33 | |
Peter Senna Tschudin | a2b22dd | 2018-07-10 16:01:45 +0200 | [diff] [blame] | 34 | /* |
| 35 | * cpu_to_le16/32 are used when initializing structures, a context where a |
| 36 | * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way |
| 37 | * that allows them to be used when initializing structures. |
| 38 | */ |
| 39 | |
| 40 | #if __BYTE_ORDER == __LITTLE_ENDIAN |
| 41 | #define cpu_to_le16(x) (x) |
| 42 | #define cpu_to_le32(x) (x) |
| 43 | #else |
| 44 | #define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) |
| 45 | #define cpu_to_le32(x) \ |
| 46 | ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ |
| 47 | (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) |
| 48 | #endif |
| 49 | |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 50 | #define le32_to_cpu(x) le32toh(x) |
| 51 | #define le16_to_cpu(x) le16toh(x) |
| 52 | |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 53 | /******************** Messages and Errors ***********************************/ |
| 54 | |
| 55 | static const char argv0[] = "ffs-test"; |
| 56 | |
| 57 | static unsigned verbosity = 7; |
| 58 | |
| 59 | static void _msg(unsigned level, const char *fmt, ...) |
| 60 | { |
| 61 | if (level < 2) |
| 62 | level = 2; |
| 63 | else if (level > 7) |
| 64 | level = 7; |
| 65 | |
| 66 | if (level <= verbosity) { |
| 67 | static const char levels[8][6] = { |
| 68 | [2] = "crit:", |
| 69 | [3] = "err: ", |
| 70 | [4] = "warn:", |
| 71 | [5] = "note:", |
| 72 | [6] = "info:", |
| 73 | [7] = "dbg: " |
| 74 | }; |
| 75 | |
| 76 | int _errno = errno; |
| 77 | va_list ap; |
| 78 | |
| 79 | fprintf(stderr, "%s: %s ", argv0, levels[level]); |
| 80 | va_start(ap, fmt); |
| 81 | vfprintf(stderr, fmt, ap); |
| 82 | va_end(ap); |
| 83 | |
| 84 | if (fmt[strlen(fmt) - 1] != '\n') { |
| 85 | char buffer[128]; |
| 86 | strerror_r(_errno, buffer, sizeof buffer); |
| 87 | fprintf(stderr, ": (-%d) %s\n", _errno, buffer); |
| 88 | } |
| 89 | |
| 90 | fflush(stderr); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | #define die(...) (_msg(2, __VA_ARGS__), exit(1)) |
| 95 | #define err(...) _msg(3, __VA_ARGS__) |
| 96 | #define warn(...) _msg(4, __VA_ARGS__) |
| 97 | #define note(...) _msg(5, __VA_ARGS__) |
| 98 | #define info(...) _msg(6, __VA_ARGS__) |
| 99 | #define debug(...) _msg(7, __VA_ARGS__) |
| 100 | |
| 101 | #define die_on(cond, ...) do { \ |
| 102 | if (cond) \ |
| 103 | die(__VA_ARGS__); \ |
| 104 | } while (0) |
| 105 | |
| 106 | |
| 107 | /******************** Descriptors and Strings *******************************/ |
| 108 | |
| 109 | static const struct { |
Michal Nazarewicz | 51c208c | 2014-08-27 22:58:46 +0200 | [diff] [blame] | 110 | struct usb_functionfs_descs_head_v2 header; |
| 111 | __le32 fs_count; |
| 112 | __le32 hs_count; |
Felipe Balbi | 271d2d6 | 2017-01-17 15:07:19 +0200 | [diff] [blame] | 113 | __le32 ss_count; |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 114 | struct { |
| 115 | struct usb_interface_descriptor intf; |
| 116 | struct usb_endpoint_descriptor_no_audio sink; |
| 117 | struct usb_endpoint_descriptor_no_audio source; |
| 118 | } __attribute__((packed)) fs_descs, hs_descs; |
Felipe Balbi | 271d2d6 | 2017-01-17 15:07:19 +0200 | [diff] [blame] | 119 | struct { |
| 120 | struct usb_interface_descriptor intf; |
| 121 | struct usb_endpoint_descriptor_no_audio sink; |
| 122 | struct usb_ss_ep_comp_descriptor sink_comp; |
| 123 | struct usb_endpoint_descriptor_no_audio source; |
| 124 | struct usb_ss_ep_comp_descriptor source_comp; |
| 125 | } ss_descs; |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 126 | } __attribute__((packed)) descriptors = { |
| 127 | .header = { |
Michal Nazarewicz | 51c208c | 2014-08-27 22:58:46 +0200 | [diff] [blame] | 128 | .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), |
| 129 | .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | |
Felipe Balbi | 271d2d6 | 2017-01-17 15:07:19 +0200 | [diff] [blame] | 130 | FUNCTIONFS_HAS_HS_DESC | |
| 131 | FUNCTIONFS_HAS_SS_DESC), |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 132 | .length = cpu_to_le32(sizeof descriptors), |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 133 | }, |
Michal Nazarewicz | 51c208c | 2014-08-27 22:58:46 +0200 | [diff] [blame] | 134 | .fs_count = cpu_to_le32(3), |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 135 | .fs_descs = { |
| 136 | .intf = { |
| 137 | .bLength = sizeof descriptors.fs_descs.intf, |
| 138 | .bDescriptorType = USB_DT_INTERFACE, |
| 139 | .bNumEndpoints = 2, |
| 140 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
| 141 | .iInterface = 1, |
| 142 | }, |
| 143 | .sink = { |
| 144 | .bLength = sizeof descriptors.fs_descs.sink, |
| 145 | .bDescriptorType = USB_DT_ENDPOINT, |
| 146 | .bEndpointAddress = 1 | USB_DIR_IN, |
| 147 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 148 | /* .wMaxPacketSize = autoconfiguration (kernel) */ |
| 149 | }, |
| 150 | .source = { |
| 151 | .bLength = sizeof descriptors.fs_descs.source, |
| 152 | .bDescriptorType = USB_DT_ENDPOINT, |
| 153 | .bEndpointAddress = 2 | USB_DIR_OUT, |
| 154 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 155 | /* .wMaxPacketSize = autoconfiguration (kernel) */ |
| 156 | }, |
| 157 | }, |
Michal Nazarewicz | 51c208c | 2014-08-27 22:58:46 +0200 | [diff] [blame] | 158 | .hs_count = cpu_to_le32(3), |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 159 | .hs_descs = { |
| 160 | .intf = { |
| 161 | .bLength = sizeof descriptors.fs_descs.intf, |
| 162 | .bDescriptorType = USB_DT_INTERFACE, |
| 163 | .bNumEndpoints = 2, |
| 164 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
| 165 | .iInterface = 1, |
| 166 | }, |
| 167 | .sink = { |
| 168 | .bLength = sizeof descriptors.hs_descs.sink, |
| 169 | .bDescriptorType = USB_DT_ENDPOINT, |
| 170 | .bEndpointAddress = 1 | USB_DIR_IN, |
| 171 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 172 | .wMaxPacketSize = cpu_to_le16(512), |
| 173 | }, |
| 174 | .source = { |
| 175 | .bLength = sizeof descriptors.hs_descs.source, |
| 176 | .bDescriptorType = USB_DT_ENDPOINT, |
| 177 | .bEndpointAddress = 2 | USB_DIR_OUT, |
| 178 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 179 | .wMaxPacketSize = cpu_to_le16(512), |
| 180 | .bInterval = 1, /* NAK every 1 uframe */ |
| 181 | }, |
| 182 | }, |
Felipe Balbi | 271d2d6 | 2017-01-17 15:07:19 +0200 | [diff] [blame] | 183 | .ss_count = cpu_to_le32(5), |
| 184 | .ss_descs = { |
| 185 | .intf = { |
| 186 | .bLength = sizeof descriptors.fs_descs.intf, |
| 187 | .bDescriptorType = USB_DT_INTERFACE, |
| 188 | .bNumEndpoints = 2, |
| 189 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
| 190 | .iInterface = 1, |
| 191 | }, |
| 192 | .sink = { |
| 193 | .bLength = sizeof descriptors.hs_descs.sink, |
| 194 | .bDescriptorType = USB_DT_ENDPOINT, |
| 195 | .bEndpointAddress = 1 | USB_DIR_IN, |
| 196 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 197 | .wMaxPacketSize = cpu_to_le16(1024), |
| 198 | }, |
| 199 | .sink_comp = { |
| 200 | .bLength = USB_DT_SS_EP_COMP_SIZE, |
| 201 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
| 202 | .bMaxBurst = 0, |
| 203 | .bmAttributes = 0, |
| 204 | .wBytesPerInterval = 0, |
| 205 | }, |
| 206 | .source = { |
| 207 | .bLength = sizeof descriptors.hs_descs.source, |
| 208 | .bDescriptorType = USB_DT_ENDPOINT, |
| 209 | .bEndpointAddress = 2 | USB_DIR_OUT, |
| 210 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 211 | .wMaxPacketSize = cpu_to_le16(1024), |
| 212 | .bInterval = 1, /* NAK every 1 uframe */ |
| 213 | }, |
| 214 | .source_comp = { |
| 215 | .bLength = USB_DT_SS_EP_COMP_SIZE, |
| 216 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
| 217 | .bMaxBurst = 0, |
| 218 | .bmAttributes = 0, |
| 219 | .wBytesPerInterval = 0, |
| 220 | }, |
| 221 | }, |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 222 | }; |
| 223 | |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 224 | static size_t descs_to_legacy(void **legacy, const void *descriptors_v2) |
| 225 | { |
| 226 | const unsigned char *descs_end, *descs_start; |
| 227 | __u32 length, fs_count = 0, hs_count = 0, count; |
| 228 | |
| 229 | /* Read v2 header */ |
| 230 | { |
| 231 | const struct { |
| 232 | const struct usb_functionfs_descs_head_v2 header; |
| 233 | const __le32 counts[]; |
| 234 | } __attribute__((packed)) *const in = descriptors_v2; |
| 235 | const __le32 *counts = in->counts; |
| 236 | __u32 flags; |
| 237 | |
| 238 | if (le32_to_cpu(in->header.magic) != |
| 239 | FUNCTIONFS_DESCRIPTORS_MAGIC_V2) |
| 240 | return 0; |
| 241 | length = le32_to_cpu(in->header.length); |
| 242 | if (length <= sizeof in->header) |
| 243 | return 0; |
| 244 | length -= sizeof in->header; |
| 245 | flags = le32_to_cpu(in->header.flags); |
| 246 | if (flags & ~(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC | |
| 247 | FUNCTIONFS_HAS_SS_DESC)) |
| 248 | return 0; |
| 249 | |
| 250 | #define GET_NEXT_COUNT_IF_FLAG(ret, flg) do { \ |
| 251 | if (!(flags & (flg))) \ |
| 252 | break; \ |
| 253 | if (length < 4) \ |
| 254 | return 0; \ |
| 255 | ret = le32_to_cpu(*counts); \ |
| 256 | length -= 4; \ |
| 257 | ++counts; \ |
| 258 | } while (0) |
| 259 | |
| 260 | GET_NEXT_COUNT_IF_FLAG(fs_count, FUNCTIONFS_HAS_FS_DESC); |
| 261 | GET_NEXT_COUNT_IF_FLAG(hs_count, FUNCTIONFS_HAS_HS_DESC); |
| 262 | GET_NEXT_COUNT_IF_FLAG(count, FUNCTIONFS_HAS_SS_DESC); |
| 263 | |
| 264 | count = fs_count + hs_count; |
| 265 | if (!count) |
| 266 | return 0; |
| 267 | descs_start = (const void *)counts; |
| 268 | |
| 269 | #undef GET_NEXT_COUNT_IF_FLAG |
| 270 | } |
| 271 | |
| 272 | /* |
| 273 | * Find the end of FS and HS USB descriptors. SS descriptors |
| 274 | * are ignored since legacy format does not support them. |
| 275 | */ |
| 276 | descs_end = descs_start; |
| 277 | do { |
| 278 | if (length < *descs_end) |
| 279 | return 0; |
| 280 | length -= *descs_end; |
| 281 | descs_end += *descs_end; |
| 282 | } while (--count); |
| 283 | |
| 284 | /* Allocate legacy descriptors and copy the data. */ |
| 285 | { |
| 286 | #pragma GCC diagnostic push |
| 287 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| 288 | struct { |
| 289 | struct usb_functionfs_descs_head header; |
| 290 | __u8 descriptors[]; |
| 291 | } __attribute__((packed)) *out; |
| 292 | #pragma GCC diagnostic pop |
| 293 | |
| 294 | length = sizeof out->header + (descs_end - descs_start); |
| 295 | out = malloc(length); |
| 296 | out->header.magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC); |
| 297 | out->header.length = cpu_to_le32(length); |
| 298 | out->header.fs_count = cpu_to_le32(fs_count); |
| 299 | out->header.hs_count = cpu_to_le32(hs_count); |
| 300 | memcpy(out->descriptors, descs_start, descs_end - descs_start); |
| 301 | *legacy = out; |
| 302 | } |
| 303 | |
| 304 | return length; |
| 305 | } |
| 306 | |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 307 | |
| 308 | #define STR_INTERFACE_ "Source/Sink" |
| 309 | |
| 310 | static const struct { |
| 311 | struct usb_functionfs_strings_head header; |
| 312 | struct { |
| 313 | __le16 code; |
| 314 | const char str1[sizeof STR_INTERFACE_]; |
| 315 | } __attribute__((packed)) lang0; |
| 316 | } __attribute__((packed)) strings = { |
| 317 | .header = { |
| 318 | .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), |
| 319 | .length = cpu_to_le32(sizeof strings), |
| 320 | .str_count = cpu_to_le32(1), |
| 321 | .lang_count = cpu_to_le32(1), |
| 322 | }, |
| 323 | .lang0 = { |
| 324 | cpu_to_le16(0x0409), /* en-us */ |
| 325 | STR_INTERFACE_, |
| 326 | }, |
| 327 | }; |
| 328 | |
| 329 | #define STR_INTERFACE strings.lang0.str1 |
| 330 | |
| 331 | |
| 332 | /******************** Files and Threads Handling ****************************/ |
| 333 | |
| 334 | struct thread; |
| 335 | |
| 336 | static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes); |
| 337 | static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes); |
| 338 | static ssize_t ep0_consume(struct thread *t, const void *buf, size_t nbytes); |
| 339 | static ssize_t fill_in_buf(struct thread *t, void *buf, size_t nbytes); |
| 340 | static ssize_t empty_out_buf(struct thread *t, const void *buf, size_t nbytes); |
| 341 | |
| 342 | |
| 343 | static struct thread { |
| 344 | const char *const filename; |
| 345 | size_t buf_size; |
| 346 | |
| 347 | ssize_t (*in)(struct thread *, void *, size_t); |
| 348 | const char *const in_name; |
| 349 | |
| 350 | ssize_t (*out)(struct thread *, const void *, size_t); |
| 351 | const char *const out_name; |
| 352 | |
| 353 | int fd; |
| 354 | pthread_t id; |
| 355 | void *buf; |
| 356 | ssize_t status; |
| 357 | } threads[] = { |
| 358 | { |
| 359 | "ep0", 4 * sizeof(struct usb_functionfs_event), |
| 360 | read_wrap, NULL, |
| 361 | ep0_consume, "<consume>", |
| 362 | 0, 0, NULL, 0 |
| 363 | }, |
| 364 | { |
| 365 | "ep1", 8 * 1024, |
| 366 | fill_in_buf, "<in>", |
| 367 | write_wrap, NULL, |
| 368 | 0, 0, NULL, 0 |
| 369 | }, |
| 370 | { |
| 371 | "ep2", 8 * 1024, |
| 372 | read_wrap, NULL, |
| 373 | empty_out_buf, "<out>", |
| 374 | 0, 0, NULL, 0 |
| 375 | }, |
| 376 | }; |
| 377 | |
| 378 | |
| 379 | static void init_thread(struct thread *t) |
| 380 | { |
| 381 | t->buf = malloc(t->buf_size); |
| 382 | die_on(!t->buf, "malloc"); |
| 383 | |
| 384 | t->fd = open(t->filename, O_RDWR); |
| 385 | die_on(t->fd < 0, "%s", t->filename); |
| 386 | } |
| 387 | |
| 388 | static void cleanup_thread(void *arg) |
| 389 | { |
| 390 | struct thread *t = arg; |
| 391 | int ret, fd; |
| 392 | |
| 393 | fd = t->fd; |
| 394 | if (t->fd < 0) |
| 395 | return; |
| 396 | t->fd = -1; |
| 397 | |
| 398 | /* test the FIFO ioctls (non-ep0 code paths) */ |
| 399 | if (t != threads) { |
| 400 | ret = ioctl(fd, FUNCTIONFS_FIFO_STATUS); |
| 401 | if (ret < 0) { |
| 402 | /* ENODEV reported after disconnect */ |
| 403 | if (errno != ENODEV) |
| 404 | err("%s: get fifo status", t->filename); |
| 405 | } else if (ret) { |
| 406 | warn("%s: unclaimed = %d\n", t->filename, ret); |
| 407 | if (ioctl(fd, FUNCTIONFS_FIFO_FLUSH) < 0) |
| 408 | err("%s: fifo flush", t->filename); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | if (close(fd) < 0) |
| 413 | err("%s: close", t->filename); |
| 414 | |
| 415 | free(t->buf); |
| 416 | t->buf = NULL; |
| 417 | } |
| 418 | |
| 419 | static void *start_thread_helper(void *arg) |
| 420 | { |
| 421 | const char *name, *op, *in_name, *out_name; |
| 422 | struct thread *t = arg; |
| 423 | ssize_t ret; |
| 424 | |
| 425 | info("%s: starts\n", t->filename); |
| 426 | in_name = t->in_name ? t->in_name : t->filename; |
| 427 | out_name = t->out_name ? t->out_name : t->filename; |
| 428 | |
| 429 | pthread_cleanup_push(cleanup_thread, arg); |
| 430 | |
| 431 | for (;;) { |
| 432 | pthread_testcancel(); |
| 433 | |
| 434 | ret = t->in(t, t->buf, t->buf_size); |
| 435 | if (ret > 0) { |
Matthias Fend | eb9c583 | 2012-05-07 14:37:30 +0200 | [diff] [blame] | 436 | ret = t->out(t, t->buf, ret); |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 437 | name = out_name; |
| 438 | op = "write"; |
| 439 | } else { |
| 440 | name = in_name; |
| 441 | op = "read"; |
| 442 | } |
| 443 | |
| 444 | if (ret > 0) { |
| 445 | /* nop */ |
| 446 | } else if (!ret) { |
| 447 | debug("%s: %s: EOF", name, op); |
| 448 | break; |
| 449 | } else if (errno == EINTR || errno == EAGAIN) { |
| 450 | debug("%s: %s", name, op); |
| 451 | } else { |
| 452 | warn("%s: %s", name, op); |
| 453 | break; |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | pthread_cleanup_pop(1); |
| 458 | |
| 459 | t->status = ret; |
| 460 | info("%s: ends\n", t->filename); |
| 461 | return NULL; |
| 462 | } |
| 463 | |
| 464 | static void start_thread(struct thread *t) |
| 465 | { |
| 466 | debug("%s: starting\n", t->filename); |
| 467 | |
| 468 | die_on(pthread_create(&t->id, NULL, start_thread_helper, t) < 0, |
| 469 | "pthread_create(%s)", t->filename); |
| 470 | } |
| 471 | |
| 472 | static void join_thread(struct thread *t) |
| 473 | { |
| 474 | int ret = pthread_join(t->id, NULL); |
| 475 | |
| 476 | if (ret < 0) |
| 477 | err("%s: joining thread", t->filename); |
| 478 | else |
| 479 | debug("%s: joined\n", t->filename); |
| 480 | } |
| 481 | |
| 482 | |
| 483 | static ssize_t read_wrap(struct thread *t, void *buf, size_t nbytes) |
| 484 | { |
| 485 | return read(t->fd, buf, nbytes); |
| 486 | } |
| 487 | |
| 488 | static ssize_t write_wrap(struct thread *t, const void *buf, size_t nbytes) |
| 489 | { |
| 490 | return write(t->fd, buf, nbytes); |
| 491 | } |
| 492 | |
| 493 | |
| 494 | /******************** Empty/Fill buffer routines ****************************/ |
| 495 | |
| 496 | /* 0 -- stream of zeros, 1 -- i % 63, 2 -- pipe */ |
| 497 | enum pattern { PAT_ZERO, PAT_SEQ, PAT_PIPE }; |
| 498 | static enum pattern pattern; |
| 499 | |
| 500 | static ssize_t |
| 501 | fill_in_buf(struct thread *ignore, void *buf, size_t nbytes) |
| 502 | { |
| 503 | size_t i; |
| 504 | __u8 *p; |
| 505 | |
| 506 | (void)ignore; |
| 507 | |
| 508 | switch (pattern) { |
| 509 | case PAT_ZERO: |
| 510 | memset(buf, 0, nbytes); |
| 511 | break; |
| 512 | |
| 513 | case PAT_SEQ: |
| 514 | for (p = buf, i = 0; i < nbytes; ++i, ++p) |
| 515 | *p = i % 63; |
| 516 | break; |
| 517 | |
| 518 | case PAT_PIPE: |
| 519 | return fread(buf, 1, nbytes, stdin); |
| 520 | } |
| 521 | |
| 522 | return nbytes; |
| 523 | } |
| 524 | |
| 525 | static ssize_t |
| 526 | empty_out_buf(struct thread *ignore, const void *buf, size_t nbytes) |
| 527 | { |
| 528 | const __u8 *p; |
| 529 | __u8 expected; |
| 530 | ssize_t ret; |
| 531 | size_t len; |
| 532 | |
| 533 | (void)ignore; |
| 534 | |
| 535 | switch (pattern) { |
| 536 | case PAT_ZERO: |
| 537 | expected = 0; |
| 538 | for (p = buf, len = 0; len < nbytes; ++p, ++len) |
| 539 | if (*p) |
| 540 | goto invalid; |
| 541 | break; |
| 542 | |
| 543 | case PAT_SEQ: |
| 544 | for (p = buf, len = 0; len < nbytes; ++p, ++len) |
| 545 | if (*p != len % 63) { |
| 546 | expected = len % 63; |
| 547 | goto invalid; |
| 548 | } |
| 549 | break; |
| 550 | |
| 551 | case PAT_PIPE: |
| 552 | ret = fwrite(buf, nbytes, 1, stdout); |
| 553 | if (ret > 0) |
| 554 | fflush(stdout); |
| 555 | break; |
| 556 | |
| 557 | invalid: |
| 558 | err("bad OUT byte %zd, expected %02x got %02x\n", |
| 559 | len, expected, *p); |
| 560 | for (p = buf, len = 0; len < nbytes; ++p, ++len) { |
| 561 | if (0 == (len % 32)) |
Davidlohr Bueso | d105e74 | 2011-02-27 04:58:48 -0300 | [diff] [blame] | 562 | fprintf(stderr, "%4zd:", len); |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 563 | fprintf(stderr, " %02x", *p); |
| 564 | if (31 == (len % 32)) |
| 565 | fprintf(stderr, "\n"); |
| 566 | } |
| 567 | fflush(stderr); |
| 568 | errno = EILSEQ; |
| 569 | return -1; |
| 570 | } |
| 571 | |
| 572 | return len; |
| 573 | } |
| 574 | |
| 575 | |
| 576 | /******************** Endpoints routines ************************************/ |
| 577 | |
| 578 | static void handle_setup(const struct usb_ctrlrequest *setup) |
| 579 | { |
| 580 | printf("bRequestType = %d\n", setup->bRequestType); |
| 581 | printf("bRequest = %d\n", setup->bRequest); |
| 582 | printf("wValue = %d\n", le16_to_cpu(setup->wValue)); |
| 583 | printf("wIndex = %d\n", le16_to_cpu(setup->wIndex)); |
| 584 | printf("wLength = %d\n", le16_to_cpu(setup->wLength)); |
| 585 | } |
| 586 | |
| 587 | static ssize_t |
| 588 | ep0_consume(struct thread *ignore, const void *buf, size_t nbytes) |
| 589 | { |
| 590 | static const char *const names[] = { |
| 591 | [FUNCTIONFS_BIND] = "BIND", |
| 592 | [FUNCTIONFS_UNBIND] = "UNBIND", |
| 593 | [FUNCTIONFS_ENABLE] = "ENABLE", |
| 594 | [FUNCTIONFS_DISABLE] = "DISABLE", |
| 595 | [FUNCTIONFS_SETUP] = "SETUP", |
| 596 | [FUNCTIONFS_SUSPEND] = "SUSPEND", |
| 597 | [FUNCTIONFS_RESUME] = "RESUME", |
| 598 | }; |
| 599 | |
| 600 | const struct usb_functionfs_event *event = buf; |
| 601 | size_t n; |
| 602 | |
| 603 | (void)ignore; |
| 604 | |
| 605 | for (n = nbytes / sizeof *event; n; --n, ++event) |
| 606 | switch (event->type) { |
| 607 | case FUNCTIONFS_BIND: |
| 608 | case FUNCTIONFS_UNBIND: |
| 609 | case FUNCTIONFS_ENABLE: |
| 610 | case FUNCTIONFS_DISABLE: |
| 611 | case FUNCTIONFS_SETUP: |
| 612 | case FUNCTIONFS_SUSPEND: |
| 613 | case FUNCTIONFS_RESUME: |
| 614 | printf("Event %s\n", names[event->type]); |
| 615 | if (event->type == FUNCTIONFS_SETUP) |
| 616 | handle_setup(&event->u.setup); |
| 617 | break; |
| 618 | |
| 619 | default: |
| 620 | printf("Event %03u (unknown)\n", event->type); |
| 621 | } |
| 622 | |
| 623 | return nbytes; |
| 624 | } |
| 625 | |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 626 | static void ep0_init(struct thread *t, bool legacy_descriptors) |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 627 | { |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 628 | void *legacy; |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 629 | ssize_t ret; |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 630 | size_t len; |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 631 | |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 632 | if (legacy_descriptors) { |
| 633 | info("%s: writing descriptors\n", t->filename); |
| 634 | goto legacy; |
| 635 | } |
| 636 | |
| 637 | info("%s: writing descriptors (in v2 format)\n", t->filename); |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 638 | ret = write(t->fd, &descriptors, sizeof descriptors); |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 639 | |
| 640 | if (ret < 0 && errno == EINVAL) { |
| 641 | warn("%s: new format rejected, trying legacy\n", t->filename); |
| 642 | legacy: |
| 643 | len = descs_to_legacy(&legacy, &descriptors); |
| 644 | if (len) { |
| 645 | ret = write(t->fd, legacy, len); |
| 646 | free(legacy); |
| 647 | } |
| 648 | } |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 649 | die_on(ret < 0, "%s: write: descriptors", t->filename); |
| 650 | |
| 651 | info("%s: writing strings\n", t->filename); |
| 652 | ret = write(t->fd, &strings, sizeof strings); |
| 653 | die_on(ret < 0, "%s: write: strings", t->filename); |
| 654 | } |
| 655 | |
| 656 | |
| 657 | /******************** Main **************************************************/ |
| 658 | |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 659 | int main(int argc, char **argv) |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 660 | { |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 661 | bool legacy_descriptors; |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 662 | unsigned i; |
| 663 | |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 664 | legacy_descriptors = argc > 2 && !strcmp(argv[1], "-l"); |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 665 | |
| 666 | init_thread(threads); |
Michal Nazarewicz | b9a4274 | 2014-08-27 22:58:47 +0200 | [diff] [blame] | 667 | ep0_init(threads, legacy_descriptors); |
Michal Nazarewicz | 93f2aa4 | 2010-05-05 12:53:16 +0200 | [diff] [blame] | 668 | |
| 669 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
| 670 | init_thread(threads + i); |
| 671 | |
| 672 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
| 673 | start_thread(threads + i); |
| 674 | |
| 675 | start_thread_helper(threads); |
| 676 | |
| 677 | for (i = 1; i < sizeof threads / sizeof *threads; ++i) |
| 678 | join_thread(threads + i); |
| 679 | |
| 680 | return 0; |
| 681 | } |