Yavor Goulishev | e9a6831 | 2011-05-23 11:58:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Core functions for libusb-compat-0.1 |
| 3 | * Copyright (C) 2008 Daniel Drake <dsd@gentoo.org> |
| 4 | * Copyright (c) 2000-2003 Johannes Erdfelt <johannes@erdfelt.com> |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include <errno.h> |
| 23 | #include <stdarg.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <libusb.h> |
| 28 | |
| 29 | #include "usb.h" |
| 30 | #include "usbi.h" |
| 31 | |
| 32 | static libusb_context *ctx = NULL; |
| 33 | static int usb_debug = 0; |
| 34 | |
| 35 | enum usbi_log_level { |
| 36 | LOG_LEVEL_DEBUG, |
| 37 | LOG_LEVEL_INFO, |
| 38 | LOG_LEVEL_WARNING, |
| 39 | LOG_LEVEL_ERROR, |
| 40 | }; |
| 41 | |
| 42 | #ifdef ENABLE_LOGGING |
| 43 | #define _usbi_log(level, fmt...) usbi_log(level, __FUNCTION__, fmt) |
| 44 | #else |
| 45 | #define _usbi_log(level, fmt...) |
| 46 | #endif |
| 47 | |
| 48 | #ifdef ENABLE_DEBUG_LOGGING |
| 49 | #define usbi_dbg(fmt...) _usbi_log(LOG_LEVEL_DEBUG, fmt) |
| 50 | #else |
| 51 | #define usbi_dbg(fmt...) |
| 52 | #endif |
| 53 | |
| 54 | #define usbi_info(fmt...) _usbi_log(LOG_LEVEL_INFO, fmt) |
| 55 | #define usbi_warn(fmt...) _usbi_log(LOG_LEVEL_WARNING, fmt) |
| 56 | #define usbi_err(fmt...) _usbi_log(LOG_LEVEL_ERROR, fmt) |
| 57 | |
| 58 | API_EXPORTED struct usb_bus *usb_busses = NULL; |
| 59 | |
| 60 | #define compat_err(e) -(errno=libusb_to_errno(e)) |
| 61 | |
| 62 | static int libusb_to_errno(int result) |
| 63 | { |
| 64 | switch (result) { |
| 65 | case LIBUSB_SUCCESS: |
| 66 | return 0; |
| 67 | case LIBUSB_ERROR_IO: |
| 68 | return EIO; |
| 69 | case LIBUSB_ERROR_INVALID_PARAM: |
| 70 | return EINVAL; |
| 71 | case LIBUSB_ERROR_ACCESS: |
| 72 | return EACCES; |
| 73 | case LIBUSB_ERROR_NO_DEVICE: |
| 74 | return ENXIO; |
| 75 | case LIBUSB_ERROR_NOT_FOUND: |
| 76 | return ENOENT; |
| 77 | case LIBUSB_ERROR_BUSY: |
| 78 | return EBUSY; |
| 79 | case LIBUSB_ERROR_TIMEOUT: |
| 80 | return ETIMEDOUT; |
| 81 | case LIBUSB_ERROR_OVERFLOW: |
| 82 | return EOVERFLOW; |
| 83 | case LIBUSB_ERROR_PIPE: |
| 84 | return EPIPE; |
| 85 | case LIBUSB_ERROR_INTERRUPTED: |
| 86 | return EINTR; |
| 87 | case LIBUSB_ERROR_NO_MEM: |
| 88 | return ENOMEM; |
| 89 | case LIBUSB_ERROR_NOT_SUPPORTED: |
| 90 | return ENOSYS; |
| 91 | default: |
| 92 | return ERANGE; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | static void usbi_log(enum usbi_log_level level, const char *function, |
| 97 | const char *format, ...) |
| 98 | { |
| 99 | va_list args; |
| 100 | FILE *stream = stdout; |
| 101 | const char *prefix; |
| 102 | |
| 103 | #ifndef ENABLE_DEBUG_LOGGING |
| 104 | if (!usb_debug) |
| 105 | return; |
| 106 | #endif |
| 107 | |
| 108 | switch (level) { |
| 109 | case LOG_LEVEL_INFO: |
| 110 | prefix = "info"; |
| 111 | break; |
| 112 | case LOG_LEVEL_WARNING: |
| 113 | stream = stderr; |
| 114 | prefix = "warning"; |
| 115 | break; |
| 116 | case LOG_LEVEL_ERROR: |
| 117 | stream = stderr; |
| 118 | prefix = "error"; |
| 119 | break; |
| 120 | case LOG_LEVEL_DEBUG: |
| 121 | stream = stderr; |
| 122 | prefix = "debug"; |
| 123 | break; |
| 124 | default: |
| 125 | stream = stderr; |
| 126 | prefix = "unknown"; |
| 127 | break; |
| 128 | } |
| 129 | |
| 130 | fprintf(stream, "libusb-compat %s: %s: ", prefix, function); |
| 131 | |
| 132 | va_start (args, format); |
| 133 | vfprintf(stream, format, args); |
| 134 | va_end (args); |
| 135 | |
| 136 | fprintf(stream, "\n"); |
| 137 | } |
| 138 | |
| 139 | API_EXPORTED void usb_init(void) |
| 140 | { |
| 141 | int r; |
| 142 | usbi_dbg(""); |
| 143 | |
| 144 | if (!ctx) { |
| 145 | r = libusb_init(&ctx); |
| 146 | if (r < 0) { |
| 147 | usbi_err("initialization failed!"); |
| 148 | return; |
| 149 | } |
| 150 | |
| 151 | /* usb_set_debug can be called before usb_init */ |
| 152 | if (usb_debug) |
| 153 | libusb_set_debug(ctx, 3); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | API_EXPORTED void usb_set_debug(int level) |
| 158 | { |
| 159 | usb_debug = level; |
| 160 | |
| 161 | /* usb_set_debug can be called before usb_init */ |
| 162 | if (ctx) |
| 163 | libusb_set_debug(ctx, 3); |
| 164 | } |
| 165 | |
| 166 | API_EXPORTED char *usb_strerror(void) |
| 167 | { |
| 168 | return strerror(errno); |
| 169 | } |
| 170 | |
| 171 | static int find_busses(struct usb_bus **ret) |
| 172 | { |
| 173 | libusb_device **dev_list = NULL; |
| 174 | struct usb_bus *busses = NULL; |
| 175 | struct usb_bus *bus; |
| 176 | int dev_list_len = 0; |
| 177 | int i; |
| 178 | int r; |
| 179 | |
| 180 | r = libusb_get_device_list(ctx, &dev_list); |
| 181 | if (r < 0) { |
| 182 | usbi_err("get_device_list failed with error %d", r); |
| 183 | return compat_err(r); |
| 184 | } |
| 185 | |
| 186 | if (r == 0) { |
| 187 | libusb_free_device_list(dev_list, 1); |
| 188 | /* no buses */ |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | /* iterate over the device list, identifying the individual busses. |
| 193 | * we use the location field of the usb_bus structure to store the |
| 194 | * bus number. */ |
| 195 | |
| 196 | dev_list_len = r; |
| 197 | for (i = 0; i < dev_list_len; i++) { |
| 198 | libusb_device *dev = dev_list[i]; |
| 199 | uint8_t bus_num = libusb_get_bus_number(dev); |
| 200 | |
| 201 | /* if we already know about it, continue */ |
| 202 | if (busses) { |
| 203 | bus = busses; |
| 204 | int found = 0; |
| 205 | do { |
| 206 | if (bus_num == bus->location) { |
| 207 | found = 1; |
| 208 | break; |
| 209 | } |
| 210 | } while ((bus = bus->next) != NULL); |
| 211 | if (found) |
| 212 | continue; |
| 213 | } |
| 214 | |
| 215 | /* add it to the list of busses */ |
| 216 | bus = malloc(sizeof(*bus)); |
| 217 | if (!bus) |
| 218 | goto err; |
| 219 | |
| 220 | memset(bus, 0, sizeof(*bus)); |
| 221 | bus->location = bus_num; |
| 222 | sprintf(bus->dirname, "%03d", bus_num); |
| 223 | LIST_ADD(busses, bus); |
| 224 | } |
| 225 | |
| 226 | libusb_free_device_list(dev_list, 1); |
| 227 | *ret = busses; |
| 228 | return 0; |
| 229 | |
| 230 | err: |
| 231 | bus = busses; |
| 232 | while (bus) { |
| 233 | struct usb_bus *tbus = bus->next; |
| 234 | free(bus); |
| 235 | bus = tbus; |
| 236 | } |
| 237 | return -ENOMEM; |
| 238 | } |
| 239 | |
| 240 | API_EXPORTED int usb_find_busses(void) |
| 241 | { |
| 242 | struct usb_bus *new_busses = NULL; |
| 243 | struct usb_bus *bus; |
| 244 | int changes = 0; |
| 245 | int r; |
| 246 | |
| 247 | /* libusb-1.0 initialization might have failed, but we can't indicate |
| 248 | * this with libusb-0.1, so trap that situation here */ |
| 249 | if (!ctx) |
| 250 | return 0; |
| 251 | |
| 252 | usbi_dbg(""); |
| 253 | r = find_busses(&new_busses); |
| 254 | if (r < 0) { |
| 255 | usbi_err("find_busses failed with error %d", r); |
| 256 | return r; |
| 257 | } |
| 258 | |
| 259 | /* walk through all busses we already know about, removing duplicates |
| 260 | * from the new list. if we do not find it in the new list, the bus |
| 261 | * has been removed. */ |
| 262 | |
| 263 | bus = usb_busses; |
| 264 | while (bus) { |
| 265 | struct usb_bus *tbus = bus->next; |
| 266 | struct usb_bus *nbus = new_busses; |
| 267 | int found = 0; |
| 268 | usbi_dbg("in loop"); |
| 269 | |
| 270 | #if 0 /* (yavor) NO caching */ |
| 271 | while (nbus) { |
| 272 | struct usb_bus *tnbus = nbus->next; |
| 273 | |
| 274 | if (bus->location == nbus->location) { |
| 275 | LIST_DEL(new_busses, nbus); |
| 276 | free(nbus); |
| 277 | found = 1; |
| 278 | break; |
| 279 | } |
| 280 | nbus = tnbus; |
| 281 | } |
| 282 | #endif |
| 283 | if (!found) { |
| 284 | /* bus removed */ |
| 285 | usbi_dbg("bus %d removed", bus->location); |
| 286 | changes++; |
| 287 | LIST_DEL(usb_busses, bus); |
| 288 | free(bus); |
| 289 | } |
| 290 | |
| 291 | bus = tbus; |
| 292 | } |
| 293 | |
| 294 | /* anything remaining in new_busses is a new bus */ |
| 295 | bus = new_busses; |
| 296 | while (bus) { |
| 297 | struct usb_bus *tbus = bus->next; |
| 298 | usbi_dbg("bus %d added", bus->location); |
| 299 | LIST_DEL(new_busses, bus); |
| 300 | LIST_ADD(usb_busses, bus); |
| 301 | changes++; |
| 302 | bus = tbus; |
| 303 | } |
| 304 | |
| 305 | return changes; |
| 306 | } |
| 307 | |
| 308 | static int find_devices(libusb_device **dev_list, int dev_list_len, |
| 309 | struct usb_bus *bus, struct usb_device **ret) |
| 310 | { |
| 311 | struct usb_device *devices = NULL; |
| 312 | struct usb_device *dev; |
| 313 | int i; |
| 314 | |
| 315 | for (i = 0; i < dev_list_len; i++) { |
| 316 | libusb_device *newlib_dev = dev_list[i]; |
| 317 | uint8_t bus_num = libusb_get_bus_number(newlib_dev); |
| 318 | |
| 319 | if (bus_num != bus->location) |
| 320 | continue; |
| 321 | |
| 322 | dev = malloc(sizeof(*dev)); |
| 323 | if (!dev) |
| 324 | goto err; |
| 325 | |
| 326 | /* No need to reference the device now, just take the pointer. We |
| 327 | * increase the reference count later if we keep the device. */ |
| 328 | dev->dev = newlib_dev; |
| 329 | |
| 330 | dev->bus = bus; |
| 331 | dev->devnum = libusb_get_device_address(newlib_dev); |
| 332 | sprintf(dev->filename, "%03d", dev->devnum); |
| 333 | LIST_ADD(devices, dev); |
| 334 | } |
| 335 | |
| 336 | *ret = devices; |
| 337 | return 0; |
| 338 | |
| 339 | err: |
| 340 | dev = devices; |
| 341 | while (dev) { |
| 342 | struct usb_device *tdev = dev->next; |
| 343 | free(dev); |
| 344 | dev = tdev; |
| 345 | } |
| 346 | return -ENOMEM; |
| 347 | } |
| 348 | |
| 349 | static void clear_endpoint_descriptor(struct usb_endpoint_descriptor *ep) |
| 350 | { |
| 351 | if (ep->extra) |
| 352 | free(ep->extra); |
| 353 | } |
| 354 | |
| 355 | static void clear_interface_descriptor(struct usb_interface_descriptor *iface) |
| 356 | { |
| 357 | if (iface->extra) |
| 358 | free(iface->extra); |
| 359 | if (iface->endpoint) { |
| 360 | int i; |
| 361 | for (i = 0; i < iface->bNumEndpoints; i++) |
| 362 | clear_endpoint_descriptor(iface->endpoint + i); |
| 363 | free(iface->endpoint); |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | static void clear_interface(struct usb_interface *iface) |
| 368 | { |
| 369 | if (iface->altsetting) { |
| 370 | int i; |
| 371 | for (i = 0; i < iface->num_altsetting; i++) |
| 372 | clear_interface_descriptor(iface->altsetting + i); |
| 373 | free(iface->altsetting); |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | static void clear_config_descriptor(struct usb_config_descriptor *config) |
| 378 | { |
| 379 | if (config->extra) |
| 380 | free(config->extra); |
| 381 | if (config->interface) { |
| 382 | int i; |
| 383 | for (i = 0; i < config->bNumInterfaces; i++) |
| 384 | clear_interface(config->interface + i); |
| 385 | free(config->interface); |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | static void clear_device(struct usb_device *dev) |
| 390 | { |
| 391 | int i; |
| 392 | for (i = 0; i < dev->descriptor.bNumConfigurations; i++) |
| 393 | clear_config_descriptor(dev->config + i); |
| 394 | } |
| 395 | |
| 396 | static int copy_endpoint_descriptor(struct usb_endpoint_descriptor *dest, |
| 397 | const struct libusb_endpoint_descriptor *src) |
| 398 | { |
| 399 | memcpy(dest, src, USB_DT_ENDPOINT_AUDIO_SIZE); |
| 400 | |
| 401 | dest->extralen = src->extra_length; |
| 402 | if (src->extra_length) { |
| 403 | dest->extra = malloc(src->extra_length); |
| 404 | if (!dest->extra) |
| 405 | return -ENOMEM; |
| 406 | memcpy(dest->extra, src->extra, src->extra_length); |
| 407 | } |
| 408 | |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | static int copy_interface_descriptor(struct usb_interface_descriptor *dest, |
| 413 | const struct libusb_interface_descriptor *src) |
| 414 | { |
| 415 | int i; |
| 416 | int num_endpoints = src->bNumEndpoints; |
| 417 | size_t alloc_size = sizeof(struct usb_endpoint_descriptor) * num_endpoints; |
| 418 | |
| 419 | memcpy(dest, src, USB_DT_INTERFACE_SIZE); |
| 420 | dest->endpoint = malloc(alloc_size); |
| 421 | if (!dest->endpoint) |
| 422 | return -ENOMEM; |
| 423 | memset(dest->endpoint, 0, alloc_size); |
| 424 | |
| 425 | for (i = 0; i < num_endpoints; i++) { |
| 426 | int r = copy_endpoint_descriptor(dest->endpoint + i, &src->endpoint[i]); |
| 427 | if (r < 0) { |
| 428 | clear_interface_descriptor(dest); |
| 429 | return r; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | dest->extralen = src->extra_length; |
| 434 | if (src->extra_length) { |
| 435 | dest->extra = malloc(src->extra_length); |
| 436 | if (!dest->extra) { |
| 437 | clear_interface_descriptor(dest); |
| 438 | return -ENOMEM; |
| 439 | } |
| 440 | memcpy(dest->extra, src->extra, src->extra_length); |
| 441 | } |
| 442 | |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int copy_interface(struct usb_interface *dest, |
| 447 | const struct libusb_interface *src) |
| 448 | { |
| 449 | int i; |
| 450 | int num_altsetting = src->num_altsetting; |
| 451 | size_t alloc_size = sizeof(struct usb_interface_descriptor) |
| 452 | * num_altsetting; |
| 453 | |
| 454 | dest->num_altsetting = num_altsetting; |
| 455 | dest->altsetting = malloc(alloc_size); |
| 456 | if (!dest->altsetting) |
| 457 | return -ENOMEM; |
| 458 | memset(dest->altsetting, 0, alloc_size); |
| 459 | |
| 460 | for (i = 0; i < num_altsetting; i++) { |
| 461 | int r = copy_interface_descriptor(dest->altsetting + i, |
| 462 | &src->altsetting[i]); |
| 463 | if (r < 0) { |
| 464 | clear_interface(dest); |
| 465 | return r; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | return 0; |
| 470 | } |
| 471 | |
| 472 | static int copy_config_descriptor(struct usb_config_descriptor *dest, |
| 473 | const struct libusb_config_descriptor *src) |
| 474 | { |
| 475 | int i; |
| 476 | int num_interfaces = src->bNumInterfaces; |
| 477 | size_t alloc_size = sizeof(struct usb_interface) * num_interfaces; |
| 478 | |
| 479 | memcpy(dest, src, USB_DT_CONFIG_SIZE); |
| 480 | dest->interface = malloc(alloc_size); |
| 481 | if (!dest->interface) |
| 482 | return -ENOMEM; |
| 483 | memset(dest->interface, 0, alloc_size); |
| 484 | |
| 485 | for (i = 0; i < num_interfaces; i++) { |
| 486 | int r = copy_interface(dest->interface + i, &src->interface[i]); |
| 487 | if (r < 0) { |
| 488 | clear_config_descriptor(dest); |
| 489 | return r; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | dest->extralen = src->extra_length; |
| 494 | if (src->extra_length) { |
| 495 | dest->extra = malloc(src->extra_length); |
| 496 | if (!dest->extra) { |
| 497 | clear_config_descriptor(dest); |
| 498 | return -ENOMEM; |
| 499 | } |
| 500 | memcpy(dest->extra, src->extra, src->extra_length); |
| 501 | } |
| 502 | |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static int initialize_device(struct usb_device *dev) |
| 507 | { |
| 508 | libusb_device *newlib_dev = dev->dev; |
| 509 | int num_configurations; |
| 510 | size_t alloc_size; |
| 511 | int r; |
| 512 | int i; |
| 513 | |
| 514 | /* device descriptor is identical in both libs */ |
| 515 | r = libusb_get_device_descriptor(newlib_dev, |
| 516 | (struct libusb_device_descriptor *) &dev->descriptor); |
| 517 | if (r < 0) { |
| 518 | usbi_err("error %d getting device descriptor", r); |
| 519 | return compat_err(r); |
| 520 | } |
| 521 | |
| 522 | num_configurations = dev->descriptor.bNumConfigurations; |
| 523 | alloc_size = sizeof(struct usb_config_descriptor) * num_configurations; |
| 524 | dev->config = malloc(alloc_size); |
| 525 | if (!dev->config) |
| 526 | return -ENOMEM; |
| 527 | memset(dev->config, 0, alloc_size); |
| 528 | |
| 529 | /* even though structures are identical, we can't just use libusb-1.0's |
| 530 | * config descriptors because we have to store all configurations in |
| 531 | * a single flat memory area (libusb-1.0 provides separate allocations). |
| 532 | * we hand-copy libusb-1.0's descriptors into our own structures. */ |
| 533 | for (i = 0; i < num_configurations; i++) { |
| 534 | struct libusb_config_descriptor *newlib_config; |
| 535 | r = libusb_get_config_descriptor(newlib_dev, i, &newlib_config); |
| 536 | if (r < 0) { |
| 537 | clear_device(dev); |
| 538 | free(dev->config); |
| 539 | return compat_err(r); |
| 540 | } |
| 541 | r = copy_config_descriptor(dev->config + i, newlib_config); |
| 542 | libusb_free_config_descriptor(newlib_config); |
| 543 | if (r < 0) { |
| 544 | clear_device(dev); |
| 545 | free(dev->config); |
| 546 | return r; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | /* libusb doesn't implement this and it doesn't seem that important. If |
| 551 | * someone asks for it, we can implement it in v1.1 or later. */ |
| 552 | dev->num_children = 0; |
| 553 | dev->children = NULL; |
| 554 | |
| 555 | libusb_ref_device(newlib_dev); |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static void free_device(struct usb_device *dev) |
| 560 | { |
| 561 | clear_device(dev); |
| 562 | libusb_unref_device(dev->dev); |
| 563 | free(dev); |
| 564 | } |
| 565 | |
| 566 | API_EXPORTED int usb_find_devices(void) |
| 567 | { |
| 568 | struct usb_bus *bus; |
| 569 | libusb_device **dev_list; |
| 570 | int dev_list_len; |
| 571 | int r; |
| 572 | int changes = 0; |
| 573 | |
| 574 | /* libusb-1.0 initialization might have failed, but we can't indicate |
| 575 | * this with libusb-0.1, so trap that situation here */ |
| 576 | if (!ctx) |
| 577 | return 0; |
| 578 | |
| 579 | usbi_dbg(""); |
| 580 | dev_list_len = libusb_get_device_list(ctx, &dev_list); |
| 581 | if (dev_list_len < 0) |
| 582 | return compat_err(dev_list_len); |
| 583 | |
| 584 | for (bus = usb_busses; bus; bus = bus->next) { |
| 585 | struct usb_device *new_devices = NULL; |
| 586 | struct usb_device *dev; |
| 587 | |
| 588 | r = find_devices(dev_list, dev_list_len, bus, &new_devices); |
| 589 | if (r < 0) { |
| 590 | libusb_free_device_list(dev_list, 1); |
| 591 | return r; |
| 592 | } |
| 593 | |
| 594 | /* walk through the devices we already know about, removing duplicates |
| 595 | * from the new list. if we do not find it in the new list, the device |
| 596 | * has been removed. */ |
| 597 | dev = bus->devices; |
| 598 | while (dev) { |
| 599 | int found = 0; |
| 600 | struct usb_device *tdev = dev->next; |
| 601 | struct usb_device *ndev = new_devices; |
| 602 | |
| 603 | while (ndev) { |
| 604 | if (ndev->devnum == dev->devnum) { |
| 605 | LIST_DEL(new_devices, ndev); |
| 606 | free(ndev); |
| 607 | found = 1; |
| 608 | break; |
| 609 | } |
| 610 | ndev = ndev->next; |
| 611 | } |
| 612 | |
| 613 | if (!found) { |
| 614 | usbi_dbg("device %d.%d removed", |
| 615 | dev->bus->location, dev->devnum); |
| 616 | LIST_DEL(bus->devices, dev); |
| 617 | free_device(dev); |
| 618 | changes++; |
| 619 | } |
| 620 | |
| 621 | dev = tdev; |
| 622 | } |
| 623 | |
| 624 | /* anything left in new_devices is a new device */ |
| 625 | dev = new_devices; |
| 626 | while (dev) { |
| 627 | struct usb_device *tdev = dev->next; |
| 628 | r = initialize_device(dev); |
| 629 | if (r < 0) { |
| 630 | usbi_err("couldn't initialize device %d.%d (error %d)", |
| 631 | dev->bus->location, dev->devnum, r); |
| 632 | dev = tdev; |
| 633 | continue; |
| 634 | } |
| 635 | usbi_dbg("device %d.%d added", dev->bus->location, dev->devnum); |
| 636 | LIST_DEL(new_devices, dev); |
| 637 | LIST_ADD(bus->devices, dev); |
| 638 | changes++; |
| 639 | dev = tdev; |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | libusb_free_device_list(dev_list, 1); |
| 644 | return changes; |
| 645 | } |
| 646 | |
| 647 | API_EXPORTED struct usb_bus *usb_get_busses(void) |
| 648 | { |
| 649 | return usb_busses; |
| 650 | } |
| 651 | |
| 652 | API_EXPORTED usb_dev_handle *usb_open(struct usb_device *dev) |
| 653 | { |
| 654 | int r; |
| 655 | usbi_dbg(""); |
| 656 | |
| 657 | usb_dev_handle *udev = malloc(sizeof(*udev)); |
| 658 | if (!udev) |
| 659 | return NULL; |
| 660 | |
| 661 | r = libusb_open((libusb_device *) dev->dev, &udev->handle); |
| 662 | if (r < 0) { |
| 663 | usbi_err("could not open device, error %d", r); |
| 664 | free(udev); |
| 665 | errno = libusb_to_errno(r); |
| 666 | return NULL; |
| 667 | } |
| 668 | |
| 669 | udev->last_claimed_interface = -1; |
| 670 | udev->device = dev; |
| 671 | return udev; |
| 672 | } |
| 673 | |
| 674 | API_EXPORTED int usb_close(usb_dev_handle *dev) |
| 675 | { |
| 676 | usbi_dbg(""); |
| 677 | libusb_close(dev->handle); |
| 678 | free(dev); |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | API_EXPORTED struct usb_device *usb_device(usb_dev_handle *dev) |
| 683 | { |
| 684 | return dev->device; |
| 685 | } |
| 686 | |
| 687 | API_EXPORTED int usb_set_configuration(usb_dev_handle *dev, int configuration) |
| 688 | { |
| 689 | usbi_dbg("configuration %d", configuration); |
| 690 | return compat_err(libusb_set_configuration(dev->handle, configuration)); |
| 691 | } |
| 692 | |
| 693 | API_EXPORTED int usb_claim_interface(usb_dev_handle *dev, int interface) |
| 694 | { |
| 695 | int r; |
| 696 | usbi_dbg("interface %d", interface); |
| 697 | |
| 698 | r = libusb_claim_interface(dev->handle, interface); |
| 699 | if (r == 0) { |
| 700 | dev->last_claimed_interface = interface; |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | return compat_err(r); |
| 705 | } |
| 706 | |
| 707 | API_EXPORTED int usb_release_interface(usb_dev_handle *dev, int interface) |
| 708 | { |
| 709 | int r; |
| 710 | usbi_dbg("interface %d", interface); |
| 711 | |
| 712 | r = libusb_release_interface(dev->handle, interface); |
| 713 | if (r == 0) |
| 714 | dev->last_claimed_interface = -1; |
| 715 | |
| 716 | return compat_err(r); |
| 717 | } |
| 718 | |
| 719 | API_EXPORTED int usb_set_altinterface(usb_dev_handle *dev, int alternate) |
| 720 | { |
| 721 | usbi_dbg("alternate %d", alternate); |
| 722 | if (dev->last_claimed_interface < 0) |
| 723 | return -(errno=EINVAL); |
| 724 | |
| 725 | return compat_err(libusb_set_interface_alt_setting(dev->handle, |
| 726 | dev->last_claimed_interface, alternate)); |
| 727 | } |
| 728 | |
| 729 | API_EXPORTED int usb_resetep(usb_dev_handle *dev, unsigned int ep) |
| 730 | { |
| 731 | return compat_err(usb_clear_halt(dev, ep)); |
| 732 | } |
| 733 | |
| 734 | API_EXPORTED int usb_clear_halt(usb_dev_handle *dev, unsigned int ep) |
| 735 | { |
| 736 | usbi_dbg("endpoint %x", ep); |
| 737 | return compat_err(libusb_clear_halt(dev->handle, ep & 0xff)); |
| 738 | } |
| 739 | |
| 740 | API_EXPORTED int usb_reset(usb_dev_handle *dev) |
| 741 | { |
| 742 | usbi_dbg(""); |
| 743 | return compat_err(libusb_reset_device(dev->handle)); |
| 744 | } |
| 745 | |
| 746 | static int usb_bulk_io(usb_dev_handle *dev, int ep, char *bytes, |
| 747 | int size, int timeout) |
| 748 | { |
| 749 | int actual_length; |
| 750 | int r; |
| 751 | usbi_dbg("endpoint %x size %d timeout %d", ep, size, timeout); |
| 752 | r = libusb_bulk_transfer(dev->handle, ep & 0xff, bytes, size, |
| 753 | &actual_length, timeout); |
| 754 | |
| 755 | /* if we timed out but did transfer some data, report as successful short |
| 756 | * read. FIXME: is this how libusb-0.1 works? */ |
| 757 | if (r == 0 || (r == LIBUSB_ERROR_TIMEOUT && actual_length > 0)) |
| 758 | return actual_length; |
| 759 | |
| 760 | return compat_err(r); |
| 761 | } |
| 762 | |
| 763 | API_EXPORTED int usb_bulk_read(usb_dev_handle *dev, int ep, char *bytes, |
| 764 | int size, int timeout) |
| 765 | { |
| 766 | if (!(ep & USB_ENDPOINT_IN)) { |
| 767 | /* libusb-0.1 will strangely fix up a read request from endpoint |
| 768 | * 0x01 to be from endpoint 0x81. do the same thing here, but |
| 769 | * warn about this silly behaviour. */ |
| 770 | usbi_warn("endpoint %x is missing IN direction bit, fixing"); |
| 771 | ep |= USB_ENDPOINT_IN; |
| 772 | } |
| 773 | |
| 774 | return usb_bulk_io(dev, ep, bytes, size, timeout); |
| 775 | } |
| 776 | |
| 777 | API_EXPORTED int usb_bulk_write(usb_dev_handle *dev, int ep, char *bytes, |
| 778 | int size, int timeout) |
| 779 | { |
| 780 | if (ep & USB_ENDPOINT_IN) { |
| 781 | /* libusb-0.1 on BSD strangely fix up a write request to endpoint |
| 782 | * 0x81 to be to endpoint 0x01. do the same thing here, but |
| 783 | * warn about this silly behaviour. */ |
| 784 | usbi_warn("endpoint %x has excessive IN direction bit, fixing"); |
| 785 | ep &= ~USB_ENDPOINT_IN; |
| 786 | } |
| 787 | |
| 788 | return usb_bulk_io(dev, ep, bytes, size, timeout); |
| 789 | } |
| 790 | |
| 791 | static int usb_interrupt_io(usb_dev_handle *dev, int ep, char *bytes, |
| 792 | int size, int timeout) |
| 793 | { |
| 794 | int actual_length; |
| 795 | int r; |
| 796 | usbi_dbg("endpoint %x size %d timeout %d", ep, size, timeout); |
| 797 | r = libusb_interrupt_transfer(dev->handle, ep & 0xff, bytes, size, |
| 798 | &actual_length, timeout); |
| 799 | |
| 800 | /* if we timed out but did transfer some data, report as successful short |
| 801 | * read. FIXME: is this how libusb-0.1 works? */ |
| 802 | if (r == 0 || (r == LIBUSB_ERROR_TIMEOUT && actual_length > 0)) |
| 803 | return actual_length; |
| 804 | |
| 805 | return compat_err(r); |
| 806 | } |
| 807 | |
| 808 | API_EXPORTED int usb_interrupt_read(usb_dev_handle *dev, int ep, char *bytes, |
| 809 | int size, int timeout) |
| 810 | { |
| 811 | if (!(ep & USB_ENDPOINT_IN)) { |
| 812 | /* libusb-0.1 will strangely fix up a read request from endpoint |
| 813 | * 0x01 to be from endpoint 0x81. do the same thing here, but |
| 814 | * warn about this silly behaviour. */ |
| 815 | usbi_warn("endpoint %x is missing IN direction bit, fixing"); |
| 816 | ep |= USB_ENDPOINT_IN; |
| 817 | } |
| 818 | return usb_interrupt_io(dev, ep, bytes, size, timeout); |
| 819 | } |
| 820 | |
| 821 | API_EXPORTED int usb_interrupt_write(usb_dev_handle *dev, int ep, char *bytes, |
| 822 | int size, int timeout) |
| 823 | { |
| 824 | if (ep & USB_ENDPOINT_IN) { |
| 825 | /* libusb-0.1 on BSD strangely fix up a write request to endpoint |
| 826 | * 0x81 to be to endpoint 0x01. do the same thing here, but |
| 827 | * warn about this silly behaviour. */ |
| 828 | usbi_warn("endpoint %x has excessive IN direction bit, fixing"); |
| 829 | ep &= ~USB_ENDPOINT_IN; |
| 830 | } |
| 831 | |
| 832 | return usb_interrupt_io(dev, ep, bytes, size, timeout); |
| 833 | } |
| 834 | |
| 835 | API_EXPORTED int usb_control_msg(usb_dev_handle *dev, int bmRequestType, |
| 836 | int bRequest, int wValue, int wIndex, char *bytes, int size, int timeout) |
| 837 | { |
| 838 | int r; |
| 839 | usbi_dbg("RQT=%x RQ=%x V=%x I=%x len=%d timeout=%d", bmRequestType, |
| 840 | bRequest, wValue, wIndex, size, timeout); |
| 841 | |
| 842 | r = libusb_control_transfer(dev->handle, bmRequestType & 0xff, |
| 843 | bRequest & 0xff, wValue & 0xffff, wIndex & 0xffff, bytes, size & 0xffff, |
| 844 | timeout); |
| 845 | |
| 846 | if (r >= 0) |
| 847 | return r; |
| 848 | |
| 849 | return compat_err(r); |
| 850 | } |
| 851 | |
| 852 | API_EXPORTED int usb_get_string(usb_dev_handle *dev, int desc_index, int langid, |
| 853 | char *buf, size_t buflen) |
| 854 | { |
| 855 | int r; |
| 856 | r = libusb_get_string_descriptor(dev->handle, desc_index & 0xff, |
| 857 | langid & 0xffff, buf, (int) buflen); |
| 858 | if (r >= 0) |
| 859 | return r; |
| 860 | return compat_err(r); |
| 861 | } |
| 862 | |
| 863 | API_EXPORTED int usb_get_string_simple(usb_dev_handle *dev, int desc_index, |
| 864 | char *buf, size_t buflen) |
| 865 | { |
| 866 | int r; |
| 867 | r = libusb_get_string_descriptor_ascii(dev->handle, desc_index & 0xff, |
| 868 | buf, (int) buflen); |
| 869 | if (r >= 0) |
| 870 | return r; |
| 871 | return compat_err(r); |
| 872 | } |
| 873 | |
| 874 | API_EXPORTED int usb_get_descriptor(usb_dev_handle *dev, unsigned char type, |
| 875 | unsigned char desc_index, void *buf, int size) |
| 876 | { |
| 877 | int r; |
| 878 | r = libusb_get_descriptor(dev->handle, type, desc_index, buf, size); |
| 879 | if (r >= 0) |
| 880 | return r; |
| 881 | return compat_err(r); |
| 882 | } |
| 883 | |
| 884 | API_EXPORTED int usb_get_descriptor_by_endpoint(usb_dev_handle *dev, int ep, |
| 885 | unsigned char type, unsigned char desc_index, void *buf, int size) |
| 886 | { |
| 887 | /* this function doesn't make much sense - the specs don't talk about |
| 888 | * getting a descriptor "by endpoint". libusb-1.0 does not provide this |
| 889 | * functionality so we just send a control message directly */ |
| 890 | int r; |
| 891 | r = libusb_control_transfer(dev->handle, |
| 892 | LIBUSB_ENDPOINT_IN | (ep & 0xff), LIBUSB_REQUEST_GET_DESCRIPTOR, |
| 893 | (type << 8) | desc_index, 0, buf, size, 1000); |
| 894 | if (r >= 0) |
| 895 | return r; |
| 896 | return compat_err(r); |
| 897 | } |
| 898 | |
| 899 | API_EXPORTED int usb_get_driver_np(usb_dev_handle *dev, int interface, |
| 900 | char *name, unsigned int namelen) |
| 901 | { |
| 902 | int r = libusb_kernel_driver_active(dev->handle, interface); |
| 903 | if (r == 1) { |
| 904 | /* libusb-1.0 doesn't expose driver name, so fill in a dummy value */ |
| 905 | snprintf(name, namelen, "dummy"); |
| 906 | return 0; |
| 907 | } else if (r == 0) { |
| 908 | return -(errno=ENODATA); |
| 909 | } else { |
| 910 | return compat_err(r); |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | API_EXPORTED int usb_detach_kernel_driver_np(usb_dev_handle *dev, int interface) |
| 915 | { |
| 916 | return compat_err(libusb_detach_kernel_driver(dev->handle, interface)); |
| 917 | } |
| 918 | |