1 /* 2 * \file libusb-glue.c 3 * Low-level USB interface glue towards libusb. 4 * 5 * Copyright (C) 2005-2007 Richard A. Low <richard (at) wentnet.com> 6 * Copyright (C) 2005-2008 Linus Walleij <triad (at) df.lth.se> 7 * Copyright (C) 2006-2007 Marcus Meissner 8 * Copyright (C) 2007 Ted Bullock 9 * Copyright (C) 2008 Chris Bagwell <chris (at) cnpbagwell.com> 10 * 11 * This library is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU Lesser General Public 13 * License as published by the Free Software Foundation; either 14 * version 2 of the License, or (at your option) any later version. 15 * 16 * This library is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * Lesser General Public License for more details. 20 * 21 * You should have received a copy of the GNU Lesser General Public 22 * License along with this library; if not, write to the 23 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 24 * Boston, MA 02111-1307, USA. 25 * 26 * Created by Richard Low on 24/12/2005. (as mtp-utils.c) 27 * Modified by Linus Walleij 2006-03-06 28 * (Notice that Anglo-Saxons use little-endian dates and Swedes 29 * use big-endian dates.) 30 * 31 */ 32 #include "config.h" 33 #include "libmtp.h" 34 #include "libusb-glue.h" 35 #include "device-flags.h" 36 #include "util.h" 37 #include "ptp.h" 38 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <usb.h> 44 45 #include "ptp-pack.c" 46 47 /* Aha, older libusb does not have USB_CLASS_PTP */ 48 #ifndef USB_CLASS_PTP 49 #define USB_CLASS_PTP 6 50 #endif 51 52 /* libusb dosn't have misc class defined */ 53 #ifndef USB_CLASS_MISC 54 #define USB_CLASS_MISC 0xEF 55 #endif 56 57 #define APPLE_VID 0x05ac 58 59 /* To enable debug prints for USB stuff, switch on this */ 60 //#define ENABLE_USB_BULK_DEBUG 61 62 /* Default USB timeout length. This can be overridden as needed 63 * but should start with a reasonable value so most common 64 * requests can be completed. The original value of 4000 was 65 * not long enough for large file transfer. Also, players can 66 * spend a bit of time collecting data. Higher values also 67 * make connecting/disconnecting more reliable. 68 */ 69 #define USB_TIMEOUT_DEFAULT 10000 70 71 /* USB control message data phase direction */ 72 #ifndef USB_DP_HTD 73 #define USB_DP_HTD (0x00 << 7) /* host to device */ 74 #endif 75 #ifndef USB_DP_DTH 76 #define USB_DP_DTH (0x01 << 7) /* device to host */ 77 #endif 78 79 /* USB Feature selector HALT */ 80 #ifndef USB_FEATURE_HALT 81 #define USB_FEATURE_HALT 0x00 82 #endif 83 84 /* Internal data types */ 85 struct mtpdevice_list_struct { 86 struct usb_device *libusb_device; 87 PTPParams *params; 88 PTP_USB *ptp_usb; 89 uint32_t bus_location; 90 struct mtpdevice_list_struct *next; 91 }; 92 typedef struct mtpdevice_list_struct mtpdevice_list_t; 93 94 static const LIBMTP_device_entry_t mtp_device_table[] = { 95 /* We include an .h file which is shared between us and libgphoto2 */ 96 #include "music-players.h" 97 }; 98 static const int mtp_device_table_size = sizeof(mtp_device_table) / sizeof(LIBMTP_device_entry_t); 99 100 // Local functions 101 static struct usb_bus* init_usb(); 102 static void close_usb(PTP_USB* ptp_usb); 103 static void find_interface_and_endpoints(struct usb_device *dev, 104 uint8_t *interface, 105 int* inep, 106 int* inep_maxpacket, 107 int* outep, 108 int* outep_maxpacket, 109 int* intep); 110 static void clear_stall(PTP_USB* ptp_usb); 111 static int init_ptp_usb (PTPParams* params, PTP_USB* ptp_usb, struct usb_device* dev); 112 static short ptp_write_func (unsigned long,PTPDataHandler*,void *data,unsigned long*); 113 static short ptp_read_func (unsigned long,PTPDataHandler*,void *data,unsigned long*,int); 114 static int usb_clear_stall_feature(PTP_USB* ptp_usb, int ep); 115 static int usb_get_endpoint_status(PTP_USB* ptp_usb, int ep, uint16_t* status); 116 117 /** 118 * Get a list of the supported USB devices. 119 * 120 * The developers depend on users of this library to constantly 121 * add in to the list of supported devices. What we need is the 122 * device name, USB Vendor ID (VID) and USB Product ID (PID). 123 * put this into a bug ticket at the project homepage, please. 124 * The VID/PID is used to let e.g. udev lift the device to 125 * console userspace access when it's plugged in. 126 * 127 * @param devices a pointer to a pointer that will hold a device 128 * list after the call to this function, if it was 129 * successful. 130 * @param numdevs a pointer to an integer that will hold the number 131 * of devices in the device list if the call was successful. 132 * @return 0 if the list was successfull retrieved, any other 133 * value means failure. 134 */ 135 int LIBMTP_Get_Supported_Devices_List(LIBMTP_device_entry_t ** const devices, int * const numdevs) 136 { 137 *devices = (LIBMTP_device_entry_t *) &mtp_device_table; 138 *numdevs = mtp_device_table_size; 139 return 0; 140 } 141 142 143 static struct usb_bus* init_usb() 144 { 145 usb_init(); 146 usb_find_busses(); 147 usb_find_devices(); 148 return (usb_get_busses()); 149 } 150 151 /** 152 * Small recursive function to append a new usb_device to the linked list of 153 * USB MTP devices 154 * @param devlist dynamic linked list of pointers to usb devices with MTP 155 * properties, to be extended with new device. 156 * @param newdevice the new device to add. 157 * @param bus_location bus for this device. 158 * @return an extended array or NULL on failure. 159 */ 160 static mtpdevice_list_t *append_to_mtpdevice_list(mtpdevice_list_t *devlist, 161 struct usb_device *newdevice, 162 uint32_t bus_location) 163 { 164 mtpdevice_list_t *new_list_entry; 165 166 new_list_entry = (mtpdevice_list_t *) malloc(sizeof(mtpdevice_list_t)); 167 if (new_list_entry == NULL) { 168 return NULL; 169 } 170 // Fill in USB device, if we *HAVE* to make a copy of the device do it here. 171 new_list_entry->libusb_device = newdevice; 172 new_list_entry->bus_location = bus_location; 173 new_list_entry->next = NULL; 174 175 if (devlist == NULL) { 176 return new_list_entry; 177 } else { 178 mtpdevice_list_t *tmp = devlist; 179 while (tmp->next != NULL) { 180 tmp = tmp->next; 181 } 182 tmp->next = new_list_entry; 183 } 184 return devlist; 185 } 186 187 /** 188 * Small recursive function to free dynamic memory allocated to the linked list 189 * of USB MTP devices 190 * @param devlist dynamic linked list of pointers to usb devices with MTP 191 * properties. 192 * @return nothing 193 */ 194 static void free_mtpdevice_list(mtpdevice_list_t *devlist) 195 { 196 mtpdevice_list_t *tmplist = devlist; 197 198 if (devlist == NULL) 199 return; 200 while (tmplist != NULL) { 201 mtpdevice_list_t *tmp = tmplist; 202 tmplist = tmplist->next; 203 // Do not free() the fields (ptp_usb, params)! These are used elsewhere. 204 free(tmp); 205 } 206 return; 207 } 208 209 /* Comment out this define to enable the original, more aggressive probing. */ 210 #define MILD_MTP_PROBING 211 212 #ifdef MILD_MTP_PROBING 213 /** 214 * This checks if a device has an interface with MTP description. 215 * 216 * @param dev a device struct from libusb. 217 * @param dumpfile set to non-NULL to make the descriptors dump out 218 * to this file in human-readable hex so we can scruitinze them. 219 * @return 1 if the device is MTP compliant, 0 if not. 220 */ 221 static int probe_device_descriptor(struct usb_device *dev, FILE *dumpfile) 222 { 223 usb_dev_handle *devh; 224 unsigned char buf[1024]; 225 int i; 226 int ret; 227 228 /* 229 * Don't examine devices that are not likely to 230 * contain any MTP interface, update this the day 231 * you find some weird combination... 232 */ 233 if (!(dev->descriptor.bDeviceClass == USB_CLASS_PER_INTERFACE || 234 dev->descriptor.bDeviceClass == USB_CLASS_PTP || 235 dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC) || 236 /* Apple devices sometimes freeze when probed by libusb */ 237 dev->descriptor.idVendor == APPLE_VID) { 238 return 0; 239 } 240 241 /* Attempt to open Device on this port */ 242 devh = usb_open(dev); 243 if (devh == NULL) { 244 /* Could not open this device */ 245 return 0; 246 } 247 248 /* 249 * This sometimes crashes on the j for loop below 250 * I think it is because config is NULL yet 251 * dev->descriptor.bNumConfigurations > 0 252 * this check should stop this 253 */ 254 if (dev->config) { 255 /* 256 * Loop over the interfaces, and check for string "MTP" 257 * in the descriptions. 258 */ 259 260 for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { 261 uint8_t j; 262 263 for (j = 0; j < dev->config[i].bNumInterfaces; j++) { 264 int k; 265 for (k = 0; k < dev->config[i].interface[j].num_altsetting; k++) { 266 /* Current interface descriptor */ 267 struct usb_interface_descriptor *intf = 268 &dev->config[i].interface[j].altsetting[k]; 269 270 buf[0] = '\0'; 271 ret = usb_get_string_simple(devh, 272 dev->config[i].interface[j].altsetting[k].iInterface, 273 (char *) buf, 274 1024); 275 276 if (ret < 3) 277 continue; 278 if (strcmp((char *) buf, "MTP") == 0) { 279 if (dumpfile != NULL) { 280 fprintf(dumpfile, "Configuration %d, interface %d, altsetting %d:\n", i, j, k); 281 fprintf(dumpfile, " Interface description contains the string \"MTP\"\n"); 282 fprintf(dumpfile, " Device recognized as MTP, no further probing.\n"); 283 } 284 usb_close(devh); 285 return 1; 286 } 287 } 288 } 289 } 290 } 291 292 usb_close(devh); 293 return 0; 294 } 295 296 #else /* MILD_MTP_PROBING */ 297 /** 298 * This checks if a device has an MTP descriptor. The descriptor was 299 * elaborated about in gPhoto bug 1482084, and some official documentation 300 * with no strings attached was published by Microsoft at 301 * http://www.microsoft.com/whdc/system/bus/USB/USBFAQ_intermed.mspx#E3HAC 302 * 303 * @param dev a device struct from libusb. 304 * @param dumpfile set to non-NULL to make the descriptors dump out 305 * to this file in human-readable hex so we can scruitinze them. 306 * @return 1 if the device is MTP compliant, 0 if not. 307 */ 308 static int probe_device_descriptor(struct usb_device *dev, FILE *dumpfile) 309 { 310 usb_dev_handle *devh; 311 unsigned char buf[1024], cmd; 312 int i; 313 int ret; 314 315 /* Don't examine hubs (no point in that) */ 316 if (dev->descriptor.bDeviceClass == USB_CLASS_HUB) { 317 return 0; 318 } 319 320 /* Attempt to open Device on this port */ 321 devh = usb_open(dev); 322 if (devh == NULL) { 323 /* Could not open this device */ 324 return 0; 325 } 326 327 /* 328 * This sometimes crashes on the j for loop below 329 * I think it is because config is NULL yet 330 * dev->descriptor.bNumConfigurations > 0 331 * this check should stop this 332 */ 333 if (dev->config) { 334 /* 335 * Loop over the device configurations and interfaces. Nokia MTP-capable 336 * handsets (possibly others) typically have the string "MTP" in their 337 * MTP interface descriptions, that's how they can be detected, before 338 * we try the more esoteric "OS descriptors" (below). 339 */ 340 for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { 341 uint8_t j; 342 343 for (j = 0; j < dev->config[i].bNumInterfaces; j++) { 344 int k; 345 for (k = 0; k < dev->config[i].interface[j].num_altsetting; k++) { 346 /* Current interface descriptor */ 347 struct usb_interface_descriptor *intf = 348 &dev->config[i].interface[j].altsetting[k]; 349 350 351 buf[0] = '\0'; 352 ret = usb_get_string_simple(devh, 353 dev->config[i].interface[j].altsetting[k].iInterface, 354 (char *) buf, 355 1024); 356 if (ret < 3) 357 continue; 358 if (strcmp((char *) buf, "MTP") == 0) { 359 if (dumpfile != NULL) { 360 fprintf(dumpfile, "Configuration %d, interface %d, altsetting %d:\n", i, j, k); 361 fprintf(dumpfile, " Interface description contains the string \"MTP\"\n"); 362 fprintf(dumpfile, " Device recognized as MTP, no further probing.\n"); 363 } 364 usb_close(devh); 365 return 1; 366 } 367 #ifdef LIBUSB_HAS_GET_DRIVER_NP 368 { 369 /* 370 * Specifically avoid probing anything else than USB mass storage devices 371 * and non-associated drivers in Linux. 372 */ 373 char devname[0x10]; 374 375 devname[0] = '\0'; 376 ret = usb_get_driver_np(devh, 377 dev->config[i].interface[j].altsetting[k].iInterface, 378 devname, 379 sizeof(devname)); 380 if (devname[0] != '\0' && strcmp(devname, "usb-storage")) { 381 printf("avoid probing device using kernel interface \"%s\"\n", devname); 382 return 0; 383 } 384 } 385 #endif 386 } 387 } 388 } 389 } else { 390 if (dev->descriptor.bNumConfigurations) 391 printf("dev->config is NULL in probe_device_descriptor yet dev->descriptor.bNumConfigurations > 0\n"); 392 } 393 394 /* Read the special descriptor */ 395 ret = usb_get_descriptor(devh, 0x03, 0xee, buf, sizeof(buf)); 396 397 // Dump it, if requested 398 if (dumpfile != NULL && ret > 0) { 399 fprintf(dumpfile, "Microsoft device descriptor 0xee:\n"); 400 data_dump_ascii(dumpfile, buf, ret, 16); 401 } 402 403 /* Check if descriptor length is at least 10 bytes */ 404 if (ret < 10) { 405 usb_close(devh); 406 return 0; 407 } 408 409 /* Check if this device has a Microsoft Descriptor */ 410 if (!((buf[2] == 'M') && (buf[4] == 'S') && 411 (buf[6] == 'F') && (buf[8] == 'T'))) { 412 usb_close(devh); 413 return 0; 414 } 415 416 /* Check if device responds to control message 1 or if there is an error */ 417 cmd = buf[16]; 418 ret = usb_control_msg (devh, 419 USB_ENDPOINT_IN|USB_RECIP_DEVICE|USB_TYPE_VENDOR, 420 cmd, 421 0, 422 4, 423 (char *) buf, 424 sizeof(buf), 425 USB_TIMEOUT_DEFAULT); 426 427 // Dump it, if requested 428 if (dumpfile != NULL && ret > 0) { 429 fprintf(dumpfile, "Microsoft device response to control message 1, CMD 0x%02x:\n", cmd); 430 data_dump_ascii(dumpfile, buf, ret, 16); 431 } 432 433 /* If this is true, the device either isn't MTP or there was an error */ 434 if (ret <= 0x15) { 435 /* TODO: If there was an error, flag it and let the user know somehow */ 436 /* if(ret == -1) {} */ 437 usb_close(devh); 438 return 0; 439 } 440 441 /* Check if device is MTP or if it is something like a USB Mass Storage 442 device with Janus DRM support */ 443 if ((buf[0x12] != 'M') || (buf[0x13] != 'T') || (buf[0x14] != 'P')) { 444 usb_close(devh); 445 return 0; 446 } 447 448 /* After this point we are probably dealing with an MTP device */ 449 450 /* Check if device responds to control message 2 or if there is an error*/ 451 ret = usb_control_msg (devh, 452 USB_ENDPOINT_IN|USB_RECIP_DEVICE|USB_TYPE_VENDOR, 453 cmd, 454 0, 455 5, 456 (char *) buf, 457 sizeof(buf), 458 USB_TIMEOUT_DEFAULT); 459 460 // Dump it, if requested 461 if (dumpfile != NULL && ret > 0) { 462 fprintf(dumpfile, "Microsoft device response to control message 2, CMD 0x%02x:\n", cmd); 463 data_dump_ascii(dumpfile, buf, ret, 16); 464 } 465 466 /* If this is true, the device errored against control message 2 */ 467 if (ret == -1) { 468 /* TODO: Implement callback function to let managing program know there 469 was a problem, along with description of the problem */ 470 fprintf(stderr, "Potential MTP Device with VendorID:%04x and " 471 "ProductID:%04x encountered an error responding to " 472 "control message 2.\n" 473 "Problems may arrise but continuing\n", 474 dev->descriptor.idVendor, dev->descriptor.idProduct); 475 } else if (ret <= 0x15) { 476 /* TODO: Implement callback function to let managing program know there 477 was a problem, along with description of the problem */ 478 fprintf(stderr, "Potential MTP Device with VendorID:%04x and " 479 "ProductID:%04x responded to control message 2 with a " 480 "response that was too short. Problems may arrise but " 481 "continuing\n", 482 dev->descriptor.idVendor, dev->descriptor.idProduct); 483 } else if ((buf[0x12] != 'M') || (buf[0x13] != 'T') || (buf[0x14] != 'P')) { 484 /* TODO: Implement callback function to let managing program know there 485 was a problem, along with description of the problem */ 486 fprintf(stderr, "Potential MTP Device with VendorID:%04x and " 487 "ProductID:%04x encountered an error responding to " 488 "control message 2\n" 489 "Problems may arrise but continuing\n", 490 dev->descriptor.idVendor, dev->descriptor.idProduct); 491 } 492 493 /* Close the USB device handle */ 494 usb_close(devh); 495 return 1; 496 } 497 #endif /* MILD_MTP_PROBING */ 498 499 /** 500 * This function scans through the connected usb devices on a machine and 501 * if they match known Vendor and Product identifiers appends them to the 502 * dynamic array mtp_device_list. Be sure to call 503 * <code>free_mtpdevice_list(mtp_device_list)</code> when you are done 504 * with it, assuming it is not NULL. 505 * @param mtp_device_list dynamic array of pointers to usb devices with MTP 506 * properties (if this list is not empty, new entries will be appended 507 * to the list). 508 * @return LIBMTP_ERROR_NONE implies that devices have been found, scan the list 509 * appropriately. LIBMTP_ERROR_NO_DEVICE_ATTACHED implies that no 510 * devices have been found. 511 */ 512 static LIBMTP_error_number_t get_mtp_usb_device_list(mtpdevice_list_t ** mtp_device_list) 513 { 514 struct usb_bus *bus = init_usb(); 515 for (; bus != NULL; bus = bus->next) { 516 struct usb_device *dev = bus->devices; 517 for (; dev != NULL; dev = dev->next) { 518 if (dev->descriptor.bDeviceClass != USB_CLASS_HUB) { 519 int i; 520 int found = 0; 521 522 // First check if we know about the device already. 523 // Devices well known to us will not have their descriptors 524 // probed, it caused problems with some devices. 525 for(i = 0; i < mtp_device_table_size; i++) { 526 if(dev->descriptor.idVendor == mtp_device_table[i].vendor_id && 527 dev->descriptor.idProduct == mtp_device_table[i].product_id) { 528 /* Append this usb device to the MTP device list */ 529 *mtp_device_list = append_to_mtpdevice_list(*mtp_device_list, 530 dev, 531 bus->location); 532 found = 1; 533 break; 534 } 535 } 536 // If we didn't know it, try probing the "OS Descriptor". 537 if (!found) { 538 if (probe_device_descriptor(dev, NULL)) { 539 /* Append this usb device to the MTP USB Device List */ 540 *mtp_device_list = append_to_mtpdevice_list(*mtp_device_list, 541 dev, 542 bus->location); 543 } 544 /* 545 * By thomas_-_s: Also append devices that are no MTP but PTP devices 546 * if this is commented out. 547 */ 548 /* 549 else { 550 // Check whether the device is no USB hub but a PTP. 551 if ( dev->config != NULL &&dev->config->interface->altsetting->bInterfaceClass == USB_CLASS_PTP && dev->descriptor.bDeviceClass != USB_CLASS_HUB ) { 552 *mtp_device_list = append_to_mtpdevice_list(*mtp_device_list, dev, bus->location); 553 } 554 } 555 */ 556 } 557 } 558 } 559 } 560 561 /* If nothing was found we end up here. */ 562 if(*mtp_device_list == NULL) { 563 return LIBMTP_ERROR_NO_DEVICE_ATTACHED; 564 } 565 return LIBMTP_ERROR_NONE; 566 } 567 568 /** 569 * Detect the raw MTP device descriptors and return a list of 570 * of the devices found. 571 * 572 * @param devices a pointer to a variable that will hold 573 * the list of raw devices found. This may be NULL 574 * on return if the number of detected devices is zero. 575 * The user shall simply <code>free()</code> this 576 * variable when finished with the raw devices, 577 * in order to release memory. 578 * @param numdevs a pointer to an integer that will hold 579 * the number of devices in the list. This may 580 * be 0. 581 * @return 0 if successful, any other value means failure. 582 */ 583 LIBMTP_error_number_t LIBMTP_Detect_Raw_Devices(LIBMTP_raw_device_t ** devices, 584 int * numdevs) 585 { 586 mtpdevice_list_t *devlist = NULL; 587 mtpdevice_list_t *dev; 588 LIBMTP_error_number_t ret; 589 LIBMTP_raw_device_t *retdevs; 590 int devs = 0; 591 int i, j; 592 593 ret = get_mtp_usb_device_list(&devlist); 594 if (ret == LIBMTP_ERROR_NO_DEVICE_ATTACHED) { 595 *devices = NULL; 596 *numdevs = 0; 597 return ret; 598 } else if (ret != LIBMTP_ERROR_NONE) { 599 fprintf(stderr, "LIBMTP PANIC: get_mtp_usb_device_list() " 600 "error code: %d on line %d\n", ret, __LINE__); 601 return ret; 602 } 603 604 // Get list size 605 dev = devlist; 606 while (dev != NULL) { 607 devs++; 608 dev = dev->next; 609 } 610 if (devs == 0) { 611 *devices = NULL; 612 *numdevs = 0; 613 return LIBMTP_ERROR_NONE; 614 } 615 // Conjure a device list 616 retdevs = (LIBMTP_raw_device_t *) malloc(sizeof(LIBMTP_raw_device_t) * devs); 617 if (retdevs == NULL) { 618 // Out of memory 619 *devices = NULL; 620 *numdevs = 0; 621 return LIBMTP_ERROR_MEMORY_ALLOCATION; 622 } 623 dev = devlist; 624 i = 0; 625 while (dev != NULL) { 626 int device_known = 0; 627 628 // Assign default device info 629 retdevs[i].device_entry.vendor = NULL; 630 retdevs[i].device_entry.vendor_id = dev->libusb_device->descriptor.idVendor; 631 retdevs[i].device_entry.product = NULL; 632 retdevs[i].device_entry.product_id = dev->libusb_device->descriptor.idProduct; 633 retdevs[i].device_entry.device_flags = 0x00000000U; 634 // See if we can locate some additional vendor info and device flags 635 for(j = 0; j < mtp_device_table_size; j++) { 636 if(dev->libusb_device->descriptor.idVendor == mtp_device_table[j].vendor_id && 637 dev->libusb_device->descriptor.idProduct == mtp_device_table[j].product_id) { 638 device_known = 1; 639 retdevs[i].device_entry.vendor = mtp_device_table[j].vendor; 640 retdevs[i].device_entry.product = mtp_device_table[j].product; 641 retdevs[i].device_entry.device_flags = mtp_device_table[j].device_flags; 642 643 #ifdef _AFT_BUILD 644 // Disable the following features for all devices. 645 retdevs[i].device_entry.device_flags |= DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST| 646 DEVICE_FLAG_BROKEN_SET_OBJECT_PROPLIST| 647 DEVICE_FLAG_BROKEN_SEND_OBJECT_PROPLIST; 648 #endif 649 650 #ifdef ENABLE_USB_BULK_DEBUG 651 // This device is known to the developers 652 fprintf(stderr, "Device %d (VID=%04x and PID=%04x) is a %s %s.\n", 653 i, 654 dev->libusb_device->descriptor.idVendor, 655 dev->libusb_device->descriptor.idProduct, 656 mtp_device_table[j].vendor, 657 mtp_device_table[j].product); 658 #endif 659 break; 660 } 661 } 662 if (!device_known) { 663 // This device is unknown to the developers 664 fprintf(stderr, "Device %d (VID=%04x and PID=%04x) is UNKNOWN.\n", 665 i, 666 dev->libusb_device->descriptor.idVendor, 667 dev->libusb_device->descriptor.idProduct); 668 fprintf(stderr, "Please report this VID/PID and the device model to the " 669 "libmtp development team\n"); 670 /* 671 * Trying to get iManufacturer or iProduct from the device at this 672 * point would require opening a device handle, that we don't want 673 * to do right now. (Takes time for no good enough reason.) 674 */ 675 } 676 // Save the location on the bus 677 retdevs[i].bus_location = dev->bus_location; 678 retdevs[i].devnum = dev->libusb_device->devnum; 679 i++; 680 dev = dev->next; 681 } 682 *devices = retdevs; 683 *numdevs = i; 684 free_mtpdevice_list(devlist); 685 return LIBMTP_ERROR_NONE; 686 } 687 688 /** 689 * This routine just dumps out low-level 690 * USB information about the current device. 691 * @param ptp_usb the USB device to get information from. 692 */ 693 void dump_usbinfo(PTP_USB *ptp_usb) 694 { 695 struct usb_device *dev; 696 697 #ifdef LIBUSB_HAS_GET_DRIVER_NP 698 char devname[0x10]; 699 int res; 700 701 devname[0] = '\0'; 702 res = usb_get_driver_np(ptp_usb->handle, (int) ptp_usb->interface, devname, sizeof(devname)); 703 if (devname[0] != '\0') { 704 printf(" Using kernel interface \"%s\"\n", devname); 705 } 706 #endif 707 dev = usb_device(ptp_usb->handle); 708 printf(" bcdUSB: %d\n", dev->descriptor.bcdUSB); 709 printf(" bDeviceClass: %d\n", dev->descriptor.bDeviceClass); 710 printf(" bDeviceSubClass: %d\n", dev->descriptor.bDeviceSubClass); 711 printf(" bDeviceProtocol: %d\n", dev->descriptor.bDeviceProtocol); 712 printf(" idVendor: %04x\n", dev->descriptor.idVendor); 713 printf(" idProduct: %04x\n", dev->descriptor.idProduct); 714 printf(" IN endpoint maxpacket: %d bytes\n", ptp_usb->inep_maxpacket); 715 printf(" OUT endpoint maxpacket: %d bytes\n", ptp_usb->outep_maxpacket); 716 printf(" Raw device info:\n"); 717 printf(" Bus location: %d\n", ptp_usb->rawdevice.bus_location); 718 printf(" Device number: %d\n", ptp_usb->rawdevice.devnum); 719 printf(" Device entry info:\n"); 720 printf(" Vendor: %s\n", ptp_usb->rawdevice.device_entry.vendor); 721 printf(" Vendor id: 0x%04x\n", ptp_usb->rawdevice.device_entry.vendor_id); 722 printf(" Product: %s\n", ptp_usb->rawdevice.device_entry.product); 723 printf(" Vendor id: 0x%04x\n", ptp_usb->rawdevice.device_entry.product_id); 724 printf(" Device flags: 0x%08x\n", ptp_usb->rawdevice.device_entry.device_flags); 725 (void) probe_device_descriptor(dev, stdout); 726 } 727 728 /** 729 * Retrieve the apropriate playlist extension for this 730 * device. Rather hacky at the moment. This is probably 731 * desired by the managing software, but when creating 732 * lists on the device itself you notice certain preferences. 733 * @param ptp_usb the USB device to get suggestion for. 734 * @return the suggested playlist extension. 735 */ 736 const char *get_playlist_extension(PTP_USB *ptp_usb) 737 { 738 struct usb_device *dev; 739 static char creative_pl_extension[] = ".zpl"; 740 static char default_pl_extension[] = ".pla"; 741 742 dev = usb_device(ptp_usb->handle); 743 if (dev->descriptor.idVendor == 0x041e) { 744 return creative_pl_extension; 745 } 746 return default_pl_extension; 747 } 748 749 static void 750 libusb_glue_debug (PTPParams *params, const char *format, ...) 751 { 752 va_list args; 753 754 va_start (args, format); 755 if (params->debug_func!=NULL) 756 params->debug_func (params->data, format, args); 757 else 758 { 759 vfprintf (stderr, format, args); 760 fprintf (stderr,"\n"); 761 fflush (stderr); 762 } 763 va_end (args); 764 } 765 766 static void 767 libusb_glue_error (PTPParams *params, const char *format, ...) 768 { 769 va_list args; 770 771 va_start (args, format); 772 if (params->error_func!=NULL) 773 params->error_func (params->data, format, args); 774 else 775 { 776 vfprintf (stderr, format, args); 777 fprintf (stderr,"\n"); 778 fflush (stderr); 779 } 780 va_end (args); 781 } 782 783 784 /* 785 * ptp_read_func() and ptp_write_func() are 786 * based on same functions usb.c in libgphoto2. 787 * Much reading packet logs and having fun with trials and errors 788 * reveals that WMP / Windows is probably using an algorithm like this 789 * for large transfers: 790 * 791 * 1. Send the command (0x0c bytes) if headers are split, else, send 792 * command plus sizeof(endpoint) - 0x0c bytes. 793 * 2. Send first packet, max size to be sizeof(endpoint) but only when using 794 * split headers. Else goto 3. 795 * 3. REPEAT send 0x10000 byte chunks UNTIL remaining bytes < 0x10000 796 * We call 0x10000 CONTEXT_BLOCK_SIZE. 797 * 4. Send remaining bytes MOD sizeof(endpoint) 798 * 5. Send remaining bytes. If this happens to be exactly sizeof(endpoint) 799 * then also send a zero-length package. 800 * 801 * Further there is some special quirks to handle zero reads from the 802 * device, since some devices can't do them at all due to shortcomings 803 * of the USB slave controller in the device. 804 */ 805 #define CONTEXT_BLOCK_SIZE_1 0x3e00 806 #define CONTEXT_BLOCK_SIZE_2 0x200 807 #define CONTEXT_BLOCK_SIZE CONTEXT_BLOCK_SIZE_1+CONTEXT_BLOCK_SIZE_2 808 static short 809 ptp_read_func ( 810 unsigned long size, PTPDataHandler *handler,void *data, 811 unsigned long *readbytes, 812 int readzero 813 ) { 814 PTP_USB *ptp_usb = (PTP_USB *)data; 815 unsigned long toread = 0; 816 int result = 0; 817 unsigned long curread = 0; 818 unsigned long written; 819 unsigned char *bytes; 820 int expect_terminator_byte = 0; 821 822 // This is the largest block we'll need to read in. 823 bytes = malloc(CONTEXT_BLOCK_SIZE); 824 while (curread < size) { 825 826 #ifdef ENABLE_USB_BULK_DEBUG 827 printf("Remaining size to read: 0x%04lx bytes\n", size - curread); 828 #endif 829 // check equal to condition here 830 if (size - curread < CONTEXT_BLOCK_SIZE) 831 { 832 // this is the last packet 833 toread = size - curread; 834 // this is equivalent to zero read for these devices 835 if (readzero && FLAG_NO_ZERO_READS(ptp_usb) && toread % 64 == 0) { 836 toread += 1; 837 expect_terminator_byte = 1; 838 } 839 } 840 else if (curread == 0) 841 // we are first packet, but not last packet 842 toread = CONTEXT_BLOCK_SIZE_1; 843 else if (toread == CONTEXT_BLOCK_SIZE_1) 844 toread = CONTEXT_BLOCK_SIZE_2; 845 else if (toread == CONTEXT_BLOCK_SIZE_2) 846 toread = CONTEXT_BLOCK_SIZE_1; 847 else 848 printf("unexpected toread size 0x%04x, 0x%04x remaining bytes\n", 849 (unsigned int) toread, (unsigned int) (size-curread)); 850 851 #ifdef ENABLE_USB_BULK_DEBUG 852 printf("Reading in 0x%04lx bytes\n", toread); 853 #endif 854 result = USB_BULK_READ(ptp_usb->handle, ptp_usb->inep, (char*)bytes, toread, ptp_usb->timeout); 855 #ifdef ENABLE_USB_BULK_DEBUG 856 printf("Result of read: 0x%04x\n", result); 857 #endif 858 859 if (result < 0) { 860 return PTP_ERROR_IO; 861 } 862 #ifdef ENABLE_USB_BULK_DEBUG 863 printf("<==USB IN\n"); 864 if (result == 0) 865 printf("Zero Read\n"); 866 else if (result < 0) 867 fprintf(stderr, "USB_BULK_READ result=%#x\n", result); 868 else 869 data_dump_ascii (stdout,bytes,result,16); 870 #endif 871 872 // want to discard extra byte 873 if (expect_terminator_byte && result == toread) 874 { 875 #ifdef ENABLE_USB_BULK_DEBUG 876 printf("<==USB IN\nDiscarding extra byte\n"); 877 #endif 878 result--; 879 } 880 881 int putfunc_ret = handler->putfunc(NULL, handler->priv, result, bytes, &written); 882 if (putfunc_ret != PTP_RC_OK) 883 return putfunc_ret; 884 885 ptp_usb->current_transfer_complete += result; 886 curread += result; 887 888 // Increase counters, call callback 889 if (ptp_usb->callback_active) { 890 if (ptp_usb->current_transfer_complete >= ptp_usb->current_transfer_total) { 891 // send last update and disable callback. 892 ptp_usb->current_transfer_complete = ptp_usb->current_transfer_total; 893 ptp_usb->callback_active = 0; 894 } 895 if (ptp_usb->current_transfer_callback != NULL) { 896 int ret; 897 ret = ptp_usb->current_transfer_callback(ptp_usb->current_transfer_complete, 898 ptp_usb->current_transfer_total, 899 ptp_usb->current_transfer_callback_data); 900 if (ret != 0) { 901 return PTP_ERROR_CANCEL; 902 } 903 } 904 } 905 906 if (result < toread) /* short reads are common */ 907 break; 908 } 909 if (readbytes) *readbytes = curread; 910 free (bytes); 911 912 // there might be a zero packet waiting for us... 913 if (readzero && 914 !FLAG_NO_ZERO_READS(ptp_usb) && 915 curread % ptp_usb->outep_maxpacket == 0) { 916 char temp; 917 int zeroresult = 0; 918 919 #ifdef ENABLE_USB_BULK_DEBUG 920 printf("<==USB IN\n"); 921 printf("Zero Read\n"); 922 #endif 923 zeroresult = USB_BULK_READ(ptp_usb->handle, ptp_usb->inep, &temp, 0, ptp_usb->timeout); 924 if (zeroresult != 0) 925 printf("LIBMTP panic: unable to read in zero packet, response 0x%04x", zeroresult); 926 } 927 928 return PTP_RC_OK; 929 } 930 931 static short 932 ptp_write_func ( 933 unsigned long size, 934 PTPDataHandler *handler, 935 void *data, 936 unsigned long *written 937 ) { 938 PTP_USB *ptp_usb = (PTP_USB *)data; 939 unsigned long towrite = 0; 940 int result = 0; 941 unsigned long curwrite = 0; 942 unsigned char *bytes; 943 944 // This is the largest block we'll need to read in. 945 bytes = malloc(CONTEXT_BLOCK_SIZE); 946 if (!bytes) { 947 return PTP_ERROR_IO; 948 } 949 while (curwrite < size) { 950 unsigned long usbwritten = 0; 951 towrite = size-curwrite; 952 if (towrite > CONTEXT_BLOCK_SIZE) { 953 towrite = CONTEXT_BLOCK_SIZE; 954 } else { 955 // This magic makes packets the same size that WMP send them. 956 if (towrite > ptp_usb->outep_maxpacket && towrite % ptp_usb->outep_maxpacket != 0) { 957 towrite -= towrite % ptp_usb->outep_maxpacket; 958 } 959 } 960 int getfunc_ret = handler->getfunc(NULL, handler->priv,towrite,bytes,&towrite); 961 if (getfunc_ret != PTP_RC_OK) 962 return getfunc_ret; 963 while (usbwritten < towrite) { 964 result = USB_BULK_WRITE(ptp_usb->handle,ptp_usb->outep,((char*)bytes+usbwritten),towrite-usbwritten,ptp_usb->timeout); 965 #ifdef ENABLE_USB_BULK_DEBUG 966 printf("USB OUT==>\n"); 967 if (result > 0) { 968 data_dump_ascii (stdout,bytes+usbwritten,result,16); 969 } else { 970 fprintf(stderr, "USB_BULK_WRITE: result=%#x\n", result); 971 } 972 #endif 973 if (result < 0) { 974 return PTP_ERROR_IO; 975 } 976 // check for result == 0 perhaps too. 977 // Increase counters 978 ptp_usb->current_transfer_complete += result; 979 curwrite += result; 980 usbwritten += result; 981 } 982 // call callback 983 if (ptp_usb->callback_active) { 984 if (ptp_usb->current_transfer_complete >= ptp_usb->current_transfer_total) { 985 // send last update and disable callback. 986 ptp_usb->current_transfer_complete = ptp_usb->current_transfer_total; 987 ptp_usb->callback_active = 0; 988 } 989 if (ptp_usb->current_transfer_callback != NULL) { 990 int ret; 991 ret = ptp_usb->current_transfer_callback(ptp_usb->current_transfer_complete, 992 ptp_usb->current_transfer_total, 993 ptp_usb->current_transfer_callback_data); 994 if (ret != 0) { 995 return PTP_ERROR_CANCEL; 996 } 997 } 998 } 999 if (result < towrite) /* short writes happen */ 1000 break; 1001 } 1002 free (bytes); 1003 if (written) { 1004 *written = curwrite; 1005 } 1006 1007 1008 // If this is the last transfer send a zero write if required 1009 if (ptp_usb->current_transfer_complete >= ptp_usb->current_transfer_total) { 1010 if ((towrite % ptp_usb->outep_maxpacket) == 0) { 1011 #ifdef ENABLE_USB_BULK_DEBUG 1012 printf("USB OUT==>\n"); 1013 printf("Zero Write\n"); 1014 #endif 1015 result=USB_BULK_WRITE(ptp_usb->handle,ptp_usb->outep,(char *)"x",0,ptp_usb->timeout); 1016 } 1017 } 1018 1019 if (result < 0) 1020 return PTP_ERROR_IO; 1021 return PTP_RC_OK; 1022 } 1023 1024 /* memory data get/put handler */ 1025 typedef struct { 1026 unsigned char *data; 1027 unsigned long size, curoff; 1028 } PTPMemHandlerPrivate; 1029 1030 static uint16_t 1031 memory_getfunc(PTPParams* params, void* private, 1032 unsigned long wantlen, unsigned char *data, 1033 unsigned long *gotlen 1034 ) { 1035 PTPMemHandlerPrivate* priv = (PTPMemHandlerPrivate*)private; 1036 unsigned long tocopy = wantlen; 1037 1038 if (priv->curoff + tocopy > priv->size) 1039 tocopy = priv->size - priv->curoff; 1040 memcpy (data, priv->data + priv->curoff, tocopy); 1041 priv->curoff += tocopy; 1042 *gotlen = tocopy; 1043 return PTP_RC_OK; 1044 } 1045 1046 static uint16_t 1047 memory_putfunc(PTPParams* params, void* private, 1048 unsigned long sendlen, unsigned char *data, 1049 unsigned long *putlen 1050 ) { 1051 PTPMemHandlerPrivate* priv = (PTPMemHandlerPrivate*)private; 1052 1053 if (priv->curoff + sendlen > priv->size) { 1054 priv->data = realloc (priv->data, priv->curoff+sendlen); 1055 priv->size = priv->curoff + sendlen; 1056 } 1057 memcpy (priv->data + priv->curoff, data, sendlen); 1058 priv->curoff += sendlen; 1059 *putlen = sendlen; 1060 return PTP_RC_OK; 1061 } 1062 1063 /* init private struct for receiving data. */ 1064 static uint16_t 1065 ptp_init_recv_memory_handler(PTPDataHandler *handler) { 1066 PTPMemHandlerPrivate* priv; 1067 priv = malloc (sizeof(PTPMemHandlerPrivate)); 1068 handler->priv = priv; 1069 handler->getfunc = memory_getfunc; 1070 handler->putfunc = memory_putfunc; 1071 priv->data = NULL; 1072 priv->size = 0; 1073 priv->curoff = 0; 1074 return PTP_RC_OK; 1075 } 1076 1077 /* init private struct and put data in for sending data. 1078 * data is still owned by caller. 1079 */ 1080 static uint16_t 1081 ptp_init_send_memory_handler(PTPDataHandler *handler, 1082 unsigned char *data, unsigned long len 1083 ) { 1084 PTPMemHandlerPrivate* priv; 1085 priv = malloc (sizeof(PTPMemHandlerPrivate)); 1086 if (!priv) 1087 return PTP_RC_GeneralError; 1088 handler->priv = priv; 1089 handler->getfunc = memory_getfunc; 1090 handler->putfunc = memory_putfunc; 1091 priv->data = data; 1092 priv->size = len; 1093 priv->curoff = 0; 1094 return PTP_RC_OK; 1095 } 1096 1097 /* free private struct + data */ 1098 static uint16_t 1099 ptp_exit_send_memory_handler (PTPDataHandler *handler) { 1100 PTPMemHandlerPrivate* priv = (PTPMemHandlerPrivate*)handler->priv; 1101 /* data is owned by caller */ 1102 free (priv); 1103 return PTP_RC_OK; 1104 } 1105 1106 /* hand over our internal data to caller */ 1107 static uint16_t 1108 ptp_exit_recv_memory_handler (PTPDataHandler *handler, 1109 unsigned char **data, unsigned long *size 1110 ) { 1111 PTPMemHandlerPrivate* priv = (PTPMemHandlerPrivate*)handler->priv; 1112 *data = priv->data; 1113 *size = priv->size; 1114 free (priv); 1115 return PTP_RC_OK; 1116 } 1117 1118 /* send / receive functions */ 1119 1120 uint16_t 1121 ptp_usb_sendreq (PTPParams* params, PTPContainer* req) 1122 { 1123 uint16_t ret; 1124 PTPUSBBulkContainer usbreq; 1125 PTPDataHandler memhandler; 1126 unsigned long written = 0; 1127 unsigned long towrite; 1128 #ifdef ENABLE_USB_BULK_DEBUG 1129 char txt[256]; 1130 1131 (void) ptp_render_opcode (params, req->Code, sizeof(txt), txt); 1132 printf("REQUEST: 0x%04x, %s\n", req->Code, txt); 1133 #endif 1134 /* build appropriate USB container */ 1135 usbreq.length=htod32(PTP_USB_BULK_REQ_LEN- 1136 (sizeof(uint32_t)*(5-req->Nparam))); 1137 usbreq.type=htod16(PTP_USB_CONTAINER_COMMAND); 1138 usbreq.code=htod16(req->Code); 1139 usbreq.trans_id=htod32(req->Transaction_ID); 1140 usbreq.payload.params.param1=htod32(req->Param1); 1141 usbreq.payload.params.param2=htod32(req->Param2); 1142 usbreq.payload.params.param3=htod32(req->Param3); 1143 usbreq.payload.params.param4=htod32(req->Param4); 1144 usbreq.payload.params.param5=htod32(req->Param5); 1145 /* send it to responder */ 1146 towrite = PTP_USB_BULK_REQ_LEN-(sizeof(uint32_t)*(5-req->Nparam)); 1147 ptp_init_send_memory_handler (&memhandler, (unsigned char*)&usbreq, towrite); 1148 ret=ptp_write_func( 1149 towrite, 1150 &memhandler, 1151 params->data, 1152 &written 1153 ); 1154 ptp_exit_send_memory_handler (&memhandler); 1155 if (ret!=PTP_RC_OK && ret!=PTP_ERROR_CANCEL) { 1156 ret = PTP_ERROR_IO; 1157 } 1158 if (written != towrite && ret != PTP_ERROR_CANCEL && ret != PTP_ERROR_IO) { 1159 libusb_glue_error (params, 1160 "PTP: request code 0x%04x sending req wrote only %ld bytes instead of %d", 1161 req->Code, written, towrite 1162 ); 1163 ret = PTP_ERROR_IO; 1164 } 1165 return ret; 1166 } 1167 1168 uint16_t 1169 ptp_usb_senddata (PTPParams* params, PTPContainer* ptp, 1170 unsigned long size, PTPDataHandler *handler 1171 ) { 1172 uint16_t ret; 1173 int wlen, datawlen; 1174 unsigned long written; 1175 PTPUSBBulkContainer usbdata; 1176 uint32_t bytes_left_to_transfer; 1177 PTPDataHandler memhandler; 1178 1179 #ifdef ENABLE_USB_BULK_DEBUG 1180 printf("SEND DATA PHASE\n"); 1181 #endif 1182 /* build appropriate USB container */ 1183 usbdata.length = htod32(PTP_USB_BULK_HDR_LEN+size); 1184 usbdata.type = htod16(PTP_USB_CONTAINER_DATA); 1185 usbdata.code = htod16(ptp->Code); 1186 usbdata.trans_id= htod32(ptp->Transaction_ID); 1187 1188 ((PTP_USB*)params->data)->current_transfer_complete = 0; 1189 ((PTP_USB*)params->data)->current_transfer_total = size+PTP_USB_BULK_HDR_LEN; 1190 1191 if (params->split_header_data) { 1192 datawlen = 0; 1193 wlen = PTP_USB_BULK_HDR_LEN; 1194 } else { 1195 unsigned long gotlen; 1196 /* For all camera devices. */ 1197 datawlen = (size<PTP_USB_BULK_PAYLOAD_LEN_WRITE)?size:PTP_USB_BULK_PAYLOAD_LEN_WRITE; 1198 wlen = PTP_USB_BULK_HDR_LEN + datawlen; 1199 1200 ret = handler->getfunc(params, handler->priv, datawlen, usbdata.payload.data, &gotlen); 1201 if (ret != PTP_RC_OK) 1202 return ret; 1203 if (gotlen != datawlen) 1204 return PTP_RC_GeneralError; 1205 } 1206 ptp_init_send_memory_handler (&memhandler, (unsigned char *)&usbdata, wlen); 1207 /* send first part of data */ 1208 ret = ptp_write_func(wlen, &memhandler, params->data, &written); 1209 ptp_exit_send_memory_handler (&memhandler); 1210 if (ret!=PTP_RC_OK) { 1211 return ret; 1212 } 1213 if (size <= datawlen) return ret; 1214 /* if everything OK send the rest */ 1215 bytes_left_to_transfer = size-datawlen; 1216 ret = PTP_RC_OK; 1217 while(bytes_left_to_transfer > 0) { 1218 ret = ptp_write_func (bytes_left_to_transfer, handler, params->data, &written); 1219 if (ret != PTP_RC_OK) 1220 break; 1221 if (written == 0) { 1222 ret = PTP_ERROR_IO; 1223 break; 1224 } 1225 bytes_left_to_transfer -= written; 1226 } 1227 if (ret!=PTP_RC_OK && ret!=PTP_ERROR_CANCEL) 1228 ret = PTP_ERROR_IO; 1229 return ret; 1230 } 1231 1232 static uint16_t ptp_usb_getpacket(PTPParams *params, 1233 PTPUSBBulkContainer *packet, unsigned long *rlen) 1234 { 1235 PTPDataHandler memhandler; 1236 uint16_t ret; 1237 unsigned char *x = NULL; 1238 1239 /* read the header and potentially the first data */ 1240 if (params->response_packet_size > 0) { 1241 /* If there is a buffered packet, just use it. */ 1242 memcpy(packet, params->response_packet, params->response_packet_size); 1243 *rlen = params->response_packet_size; 1244 free(params->response_packet); 1245 params->response_packet = NULL; 1246 params->response_packet_size = 0; 1247 /* Here this signifies a "virtual read" */ 1248 return PTP_RC_OK; 1249 } 1250 ptp_init_recv_memory_handler (&memhandler); 1251 ret = ptp_read_func(PTP_USB_BULK_HS_MAX_PACKET_LEN_READ, &memhandler, params->data, rlen, 0); 1252 ptp_exit_recv_memory_handler (&memhandler, &x, rlen); 1253 if (x) { 1254 memcpy (packet, x, *rlen); 1255 free (x); 1256 } 1257 return ret; 1258 } 1259 1260 uint16_t 1261 ptp_usb_getdata (PTPParams* params, PTPContainer* ptp, PTPDataHandler *handler) 1262 { 1263 uint16_t ret; 1264 PTPUSBBulkContainer usbdata; 1265 unsigned long written; 1266 PTP_USB *ptp_usb = (PTP_USB *) params->data; 1267 1268 #ifdef ENABLE_USB_BULK_DEBUG 1269 printf("GET DATA PHASE\n"); 1270 #endif 1271 memset(&usbdata,0,sizeof(usbdata)); 1272 do { 1273 unsigned long len, rlen; 1274 1275 ret = ptp_usb_getpacket(params, &usbdata, &rlen); 1276 if (ret!=PTP_RC_OK) { 1277 ret = PTP_ERROR_IO; 1278 break; 1279 } 1280 if (dtoh16(usbdata.type)!=PTP_USB_CONTAINER_DATA) { 1281 ret = PTP_ERROR_DATA_EXPECTED; 1282 break; 1283 } 1284 if (dtoh16(usbdata.code)!=ptp->Code) { 1285 if (FLAG_IGNORE_HEADER_ERRORS(ptp_usb)) { 1286 libusb_glue_debug (params, "ptp2/ptp_usb_getdata: detected a broken " 1287 "PTP header, code field insane, expect problems! (But continuing)"); 1288 // Repair the header, so it won't wreak more havoc, don't just ignore it. 1289 // Typically these two fields will be broken. 1290 usbdata.code = htod16(ptp->Code); 1291 usbdata.trans_id = htod32(ptp->Transaction_ID); 1292 ret = PTP_RC_OK; 1293 } else { 1294 ret = dtoh16(usbdata.code); 1295 // This filters entirely insane garbage return codes, but still 1296 // makes it possible to return error codes in the code field when 1297 // getting data. It appears Windows ignores the contents of this 1298 // field entirely. 1299 if (ret < PTP_RC_Undefined || ret > PTP_RC_SpecificationOfDestinationUnsupported) { 1300 libusb_glue_debug (params, "ptp2/ptp_usb_getdata: detected a broken " 1301 "PTP header, code field insane."); 1302 ret = PTP_ERROR_IO; 1303 } 1304 break; 1305 } 1306 } 1307 if (usbdata.length == 0xffffffffU) { 1308 /* Copy first part of data to 'data' */ 1309 int putfunc_ret = 1310 handler->putfunc( 1311 params, handler->priv, rlen - PTP_USB_BULK_HDR_LEN, usbdata.payload.data, 1312 &written 1313 ); 1314 if (putfunc_ret != PTP_RC_OK) 1315 return putfunc_ret; 1316 /* stuff data directly to passed data handler */ 1317 while (1) { 1318 unsigned long readdata; 1319 uint16_t xret; 1320 1321 xret = ptp_read_func( 1322 PTP_USB_BULK_HS_MAX_PACKET_LEN_READ, 1323 handler, 1324 params->data, 1325 &readdata, 1326 0 1327 ); 1328 if (xret != PTP_RC_OK) 1329 return xret; 1330 if (readdata < PTP_USB_BULK_HS_MAX_PACKET_LEN_READ) 1331 break; 1332 } 1333 return PTP_RC_OK; 1334 } 1335 if (rlen > dtoh32(usbdata.length)) { 1336 /* 1337 * Buffer the surplus response packet if it is >= 1338 * PTP_USB_BULK_HDR_LEN 1339 * (i.e. it is probably an entire package) 1340 * else discard it as erroneous surplus data. 1341 * This will even work if more than 2 packets appear 1342 * in the same transaction, they will just be handled 1343 * iteratively. 1344 * 1345 * Marcus observed stray bytes on iRiver devices; 1346 * these are still discarded. 1347 */ 1348 unsigned int packlen = dtoh32(usbdata.length); 1349 unsigned int surplen = rlen - packlen; 1350 1351 if (surplen >= PTP_USB_BULK_HDR_LEN) { 1352 params->response_packet = malloc(surplen); 1353 memcpy(params->response_packet, 1354 (uint8_t *) &usbdata + packlen, surplen); 1355 params->response_packet_size = surplen; 1356 /* Ignore reading one extra byte if device flags have been set */ 1357 } else if(!FLAG_NO_ZERO_READS(ptp_usb) && 1358 (rlen - dtoh32(usbdata.length) == 1)) { 1359 libusb_glue_debug (params, "ptp2/ptp_usb_getdata: read %d bytes " 1360 "too much, expect problems!", 1361 rlen - dtoh32(usbdata.length)); 1362 } 1363 rlen = packlen; 1364 } 1365 1366 /* For most PTP devices rlen is 512 == sizeof(usbdata) 1367 * here. For MTP devices splitting header and data it might 1368 * be 12. 1369 */ 1370 /* Evaluate full data length. */ 1371 len=dtoh32(usbdata.length)-PTP_USB_BULK_HDR_LEN; 1372 1373 /* autodetect split header/data MTP devices */ 1374 if (dtoh32(usbdata.length) > 12 && (rlen==12)) 1375 params->split_header_data = 1; 1376 1377 /* Copy first part of data to 'data' */ 1378 int putfunc_ret = 1379 handler->putfunc( 1380 params, handler->priv, rlen - PTP_USB_BULK_HDR_LEN, usbdata.payload.data, 1381 &written 1382 ); 1383 if (putfunc_ret != PTP_RC_OK) 1384 return putfunc_ret; 1385 1386 if (FLAG_NO_ZERO_READS(ptp_usb) && 1387 len+PTP_USB_BULK_HDR_LEN == PTP_USB_BULK_HS_MAX_PACKET_LEN_READ) { 1388 #ifdef ENABLE_USB_BULK_DEBUG 1389 printf("Reading in extra terminating byte\n"); 1390 #endif 1391 // need to read in extra byte and discard it 1392 int result = 0; 1393 char byte = 0; 1394 result = USB_BULK_READ(ptp_usb->handle, ptp_usb->inep, &byte, 1, ptp_usb->timeout); 1395 1396 if (result != 1) 1397 printf("Could not read in extra byte for PTP_USB_BULK_HS_MAX_PACKET_LEN_READ long file, return value 0x%04x\n", result); 1398 } else if (len+PTP_USB_BULK_HDR_LEN == PTP_USB_BULK_HS_MAX_PACKET_LEN_READ && params->split_header_data == 0) { 1399 int zeroresult = 0; 1400 char zerobyte = 0; 1401 1402 #ifdef ENABLE_USB_BULK_DEBUG 1403 printf("Reading in zero packet after header\n"); 1404 #endif 1405 zeroresult = USB_BULK_READ(ptp_usb->handle, ptp_usb->inep, &zerobyte, 0, ptp_usb->timeout); 1406 1407 if (zeroresult != 0) 1408 printf("LIBMTP panic: unable to read in zero packet, response 0x%04x", zeroresult); 1409 } 1410 1411 /* Is that all of data? */ 1412 if (len+PTP_USB_BULK_HDR_LEN<=rlen) { 1413 break; 1414 } 1415 1416 ret = ptp_read_func(len - (rlen - PTP_USB_BULK_HDR_LEN), 1417 handler, 1418 params->data, &rlen, 1); 1419 1420 if (ret!=PTP_RC_OK) { 1421 break; 1422 } 1423 } while (0); 1424 return ret; 1425 } 1426 1427 uint16_t 1428 ptp_usb_getresp (PTPParams* params, PTPContainer* resp) 1429 { 1430 uint16_t ret; 1431 unsigned long rlen; 1432 PTPUSBBulkContainer usbresp; 1433 PTP_USB *ptp_usb = (PTP_USB *)(params->data); 1434 1435 #ifdef ENABLE_USB_BULK_DEBUG 1436 printf("RESPONSE: "); 1437 #endif 1438 memset(&usbresp,0,sizeof(usbresp)); 1439 /* read response, it should never be longer than sizeof(usbresp) */ 1440 ret = ptp_usb_getpacket(params, &usbresp, &rlen); 1441 1442 // Fix for bevahiour reported by Scott Snyder on Samsung YP-U3. The player 1443 // sends a packet containing just zeroes of length 2 (up to 4 has been seen too) 1444 // after a NULL packet when it should send the response. This code ignores 1445 // such illegal packets. 1446 while (ret==PTP_RC_OK && rlen<PTP_USB_BULK_HDR_LEN && usbresp.length==0) { 1447 libusb_glue_debug (params, "ptp_usb_getresp: detected short response " 1448 "of %d bytes, expect problems! (re-reading " 1449 "response), rlen"); 1450 ret = ptp_usb_getpacket(params, &usbresp, &rlen); 1451 } 1452 1453 if (ret!=PTP_RC_OK) { 1454 ret = PTP_ERROR_IO; 1455 } else 1456 if (dtoh16(usbresp.type)!=PTP_USB_CONTAINER_RESPONSE) { 1457 ret = PTP_ERROR_RESP_EXPECTED; 1458 } else 1459 if (dtoh16(usbresp.code)!=resp->Code) { 1460 ret = dtoh16(usbresp.code); 1461 } 1462 #ifdef ENABLE_USB_BULK_DEBUG 1463 printf("%04x\n", ret); 1464 #endif 1465 if (ret!=PTP_RC_OK) { 1466 /* libusb_glue_error (params, 1467 "PTP: request code 0x%04x getting resp error 0x%04x", 1468 resp->Code, ret);*/ 1469 return ret; 1470 } 1471 /* build an appropriate PTPContainer */ 1472 resp->Code=dtoh16(usbresp.code); 1473 resp->SessionID=params->session_id; 1474 resp->Transaction_ID=dtoh32(usbresp.trans_id); 1475 if (FLAG_IGNORE_HEADER_ERRORS(ptp_usb)) { 1476 if (resp->Transaction_ID != params->transaction_id-1) { 1477 libusb_glue_debug (params, "ptp_usb_getresp: detected a broken " 1478 "PTP header, transaction ID insane, expect " 1479 "problems! (But continuing)"); 1480 // Repair the header, so it won't wreak more havoc. 1481 resp->Transaction_ID = params->transaction_id-1; 1482 } 1483 } 1484 resp->Param1=dtoh32(usbresp.payload.params.param1); 1485 resp->Param2=dtoh32(usbresp.payload.params.param2); 1486 resp->Param3=dtoh32(usbresp.payload.params.param3); 1487 resp->Param4=dtoh32(usbresp.payload.params.param4); 1488 resp->Param5=dtoh32(usbresp.payload.params.param5); 1489 return ret; 1490 } 1491 1492 /* Event handling functions */ 1493 1494 /* PTP Events wait for or check mode */ 1495 #define PTP_EVENT_CHECK 0x0000 /* waits for */ 1496 #define PTP_EVENT_CHECK_FAST 0x0001 /* checks */ 1497 1498 static inline uint16_t 1499 ptp_usb_event (PTPParams* params, PTPContainer* event, int wait) 1500 { 1501 uint16_t ret; 1502 int result; 1503 unsigned long rlen; 1504 PTPUSBEventContainer usbevent; 1505 PTP_USB *ptp_usb = (PTP_USB *)(params->data); 1506 1507 memset(&usbevent,0,sizeof(usbevent)); 1508 1509 if ((params==NULL) || (event==NULL)) 1510 return PTP_ERROR_BADPARAM; 1511 ret = PTP_RC_OK; 1512 switch(wait) { 1513 case PTP_EVENT_CHECK: 1514 result=USB_BULK_READ(ptp_usb->handle, ptp_usb->intep,(char *)&usbevent,sizeof(usbevent),ptp_usb->timeout); 1515 if (result==0) 1516 result = USB_BULK_READ(ptp_usb->handle, ptp_usb->intep,(char *) &usbevent, sizeof(usbevent), ptp_usb->timeout); 1517 if (result < 0) ret = PTP_ERROR_IO; 1518 break; 1519 case PTP_EVENT_CHECK_FAST: 1520 result=USB_BULK_READ(ptp_usb->handle, ptp_usb->intep,(char *)&usbevent,sizeof(usbevent),ptp_usb->timeout); 1521 if (result==0) 1522 result = USB_BULK_READ(ptp_usb->handle, ptp_usb->intep,(char *) &usbevent, sizeof(usbevent), ptp_usb->timeout); 1523 if (result < 0) ret = PTP_ERROR_IO; 1524 break; 1525 default: 1526 ret=PTP_ERROR_BADPARAM; 1527 break; 1528 } 1529 if (ret!=PTP_RC_OK) { 1530 libusb_glue_error (params, 1531 "PTP: reading event an error 0x%04x occurred", ret); 1532 return PTP_ERROR_IO; 1533 } 1534 rlen = result; 1535 if (rlen < 8) { 1536 libusb_glue_error (params, 1537 "PTP: reading event an short read of %ld bytes occurred", rlen); 1538 return PTP_ERROR_IO; 1539 } 1540 /* if we read anything over interrupt endpoint it must be an event */ 1541 /* build an appropriate PTPContainer */ 1542 event->Code=dtoh16(usbevent.code); 1543 event->SessionID=params->session_id; 1544 event->Transaction_ID=dtoh32(usbevent.trans_id); 1545 event->Param1=dtoh32(usbevent.param1); 1546 event->Param2=dtoh32(usbevent.param2); 1547 event->Param3=dtoh32(usbevent.param3); 1548 return ret; 1549 } 1550 1551 uint16_t 1552 ptp_usb_event_check (PTPParams* params, PTPContainer* event) { 1553 1554 return ptp_usb_event (params, event, PTP_EVENT_CHECK_FAST); 1555 } 1556 1557 uint16_t 1558 ptp_usb_event_wait (PTPParams* params, PTPContainer* event) { 1559 1560 return ptp_usb_event (params, event, PTP_EVENT_CHECK); 1561 } 1562 1563 uint16_t 1564 ptp_usb_control_cancel_request (PTPParams *params, uint32_t transactionid) { 1565 PTP_USB *ptp_usb = (PTP_USB *)(params->data); 1566 int ret; 1567 unsigned char buffer[6]; 1568 1569 htod16a(&buffer[0],PTP_EC_CancelTransaction); 1570 htod32a(&buffer[2],transactionid); 1571 ret = usb_control_msg(ptp_usb->handle, 1572 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 1573 0x64, 0x0000, 0x0000, (char *) buffer, sizeof(buffer), ptp_usb->timeout); 1574 if (ret < sizeof(buffer)) 1575 return PTP_ERROR_IO; 1576 return PTP_RC_OK; 1577 } 1578 1579 static int init_ptp_usb (PTPParams* params, PTP_USB* ptp_usb, struct usb_device* dev) 1580 { 1581 usb_dev_handle *device_handle; 1582 1583 params->sendreq_func=ptp_usb_sendreq; 1584 params->senddata_func=ptp_usb_senddata; 1585 params->getresp_func=ptp_usb_getresp; 1586 params->getdata_func=ptp_usb_getdata; 1587 params->cancelreq_func=ptp_usb_control_cancel_request; 1588 params->data=ptp_usb; 1589 params->transaction_id=0; 1590 /* 1591 * This is hardcoded here since we have no devices whatsoever that are BE. 1592 * Change this the day we run into our first BE device (if ever). 1593 */ 1594 params->byteorder = PTP_DL_LE; 1595 1596 ptp_usb->timeout = USB_TIMEOUT_DEFAULT; 1597 1598 device_handle = usb_open(dev); 1599 if (!device_handle) { 1600 perror("usb_open()"); 1601 return -1; 1602 } 1603 1604 ptp_usb->handle = device_handle; 1605 #ifdef LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP 1606 /* 1607 * If this device is known to be wrongfully claimed by other kernel 1608 * drivers (such as mass storage), then try to unload it to make it 1609 * accessible from user space. 1610 */ 1611 if (FLAG_UNLOAD_DRIVER(ptp_usb)) { 1612 if (usb_detach_kernel_driver_np(device_handle, (int) ptp_usb->interface)) { 1613 // Totally ignore this error! 1614 // perror("usb_detach_kernel_driver_np()"); 1615 } 1616 } 1617 #endif 1618 #ifdef __WIN32__ 1619 // Only needed on Windows, and cause problems on other platforms. 1620 if (usb_set_configuration(device_handle, dev->config->bConfigurationValue)) { 1621 perror("usb_set_configuration()"); 1622 return -1; 1623 } 1624 #endif 1625 if (usb_claim_interface(device_handle, (int) ptp_usb->interface)) { 1626 perror("usb_claim_interface()"); 1627 return -1; 1628 } 1629 1630 return 0; 1631 } 1632 1633 static void clear_stall(PTP_USB* ptp_usb) 1634 { 1635 uint16_t status; 1636 int ret; 1637 1638 /* check the inep status */ 1639 status = 0; 1640 ret = usb_get_endpoint_status(ptp_usb,ptp_usb->inep,&status); 1641 if (ret<0) { 1642 perror ("inep: usb_get_endpoint_status()"); 1643 } else if (status) { 1644 printf("Clearing stall on IN endpoint\n"); 1645 ret = usb_clear_stall_feature(ptp_usb,ptp_usb->inep); 1646 if (ret<0) { 1647 perror ("usb_clear_stall_feature()"); 1648 } 1649 } 1650 1651 /* check the outep status */ 1652 status=0; 1653 ret = usb_get_endpoint_status(ptp_usb,ptp_usb->outep,&status); 1654 if (ret<0) { 1655 perror("outep: usb_get_endpoint_status()"); 1656 } else if (status) { 1657 printf("Clearing stall on OUT endpoint\n"); 1658 ret = usb_clear_stall_feature(ptp_usb,ptp_usb->outep); 1659 if (ret<0) { 1660 perror("usb_clear_stall_feature()"); 1661 } 1662 } 1663 1664 /* TODO: do we need this for INTERRUPT (ptp_usb->intep) too? */ 1665 } 1666 1667 static void clear_halt(PTP_USB* ptp_usb) 1668 { 1669 int ret; 1670 1671 ret = usb_clear_halt(ptp_usb->handle,ptp_usb->inep); 1672 if (ret<0) { 1673 perror("usb_clear_halt() on IN endpoint"); 1674 } 1675 ret = usb_clear_halt(ptp_usb->handle,ptp_usb->outep); 1676 if (ret<0) { 1677 perror("usb_clear_halt() on OUT endpoint"); 1678 } 1679 ret = usb_clear_halt(ptp_usb->handle,ptp_usb->intep); 1680 if (ret<0) { 1681 perror("usb_clear_halt() on INTERRUPT endpoint"); 1682 } 1683 } 1684 1685 static void close_usb(PTP_USB* ptp_usb) 1686 { 1687 // Commented out since it was confusing some 1688 // devices to do these things. 1689 if (!FLAG_NO_RELEASE_INTERFACE(ptp_usb)) { 1690 1691 /* 1692 * Clear any stalled endpoints 1693 * On misbehaving devices designed for Windows/Mac, quote from: 1694 * http://www2.one-eyed-alien.net/~mdharm/linux-usb/target_offenses.txt 1695 * Device does Bad Things(tm) when it gets a GET_STATUS after CLEAR_HALT 1696 * (...) Windows, when clearing a stall, only sends the CLEAR_HALT command, 1697 * and presumes that the stall has cleared. Some devices actually choke 1698 * if the CLEAR_HALT is followed by a GET_STATUS (used to determine if the 1699 * STALL is persistant or not). 1700 */ 1701 clear_stall(ptp_usb); 1702 // Clear halts on any endpoints 1703 clear_halt(ptp_usb); 1704 // Added to clear some stuff on the OUT endpoint 1705 // TODO: is this good on the Mac too? 1706 // HINT: some devices may need that you comment these two out too. 1707 usb_resetep(ptp_usb->handle, ptp_usb->outep); 1708 usb_release_interface(ptp_usb->handle, (int) ptp_usb->interface); 1709 } 1710 1711 usb_close(ptp_usb->handle); 1712 } 1713 1714 /** 1715 * Self-explanatory? 1716 */ 1717 static void find_interface_and_endpoints(struct usb_device *dev, 1718 uint8_t *interface, 1719 int* inep, 1720 int* inep_maxpacket, 1721 int* outep, 1722 int *outep_maxpacket, 1723 int* intep) 1724 { 1725 int i; 1726 1727 // Loop over the device configurations 1728 for (i = 0; i < dev->descriptor.bNumConfigurations; i++) { 1729 uint8_t j; 1730 1731 for (j = 0; j < dev->config[i].bNumInterfaces; j++) { 1732 uint8_t k; 1733 uint8_t no_ep; 1734 struct usb_endpoint_descriptor *ep; 1735 1736 if (dev->descriptor.bNumConfigurations > 1 || dev->config[i].bNumInterfaces > 1) { 1737 // OK This device has more than one interface, so we have to find out 1738 // which one to use! 1739 // FIXME: Probe the interface. 1740 // FIXME: Release modules attached to all other interfaces in Linux...? 1741 } 1742 1743 *interface = dev->config[i].interface[j].altsetting->bInterfaceNumber; 1744 ep = dev->config[i].interface[j].altsetting->endpoint; 1745 no_ep = dev->config[i].interface[j].altsetting->bNumEndpoints; 1746 1747 for (k = 0; k < no_ep; k++) { 1748 if (ep[k].bmAttributes==USB_ENDPOINT_TYPE_BULK) { 1749 if ((ep[k].bEndpointAddress&USB_ENDPOINT_DIR_MASK)== 1750 USB_ENDPOINT_DIR_MASK) 1751 { 1752 *inep=ep[k].bEndpointAddress; 1753 *inep_maxpacket=ep[k].wMaxPacketSize; 1754 } 1755 if ((ep[k].bEndpointAddress&USB_ENDPOINT_DIR_MASK)==0) 1756 { 1757 *outep=ep[k].bEndpointAddress; 1758 *outep_maxpacket=ep[k].wMaxPacketSize; 1759 } 1760 } else if (ep[k].bmAttributes==USB_ENDPOINT_TYPE_INTERRUPT){ 1761 if ((ep[k].bEndpointAddress&USB_ENDPOINT_DIR_MASK)== 1762 USB_ENDPOINT_DIR_MASK) 1763 { 1764 *intep=ep[k].bEndpointAddress; 1765 } 1766 } 1767 } 1768 // We assigned the endpoints so return here. 1769 return; 1770 } 1771 } 1772 } 1773 1774 /** 1775 * This function assigns params and usbinfo given a raw device 1776 * as input. 1777 * @param device the device to be assigned. 1778 * @param usbinfo a pointer to the new usbinfo. 1779 * @return an error code. 1780 */ 1781 LIBMTP_error_number_t configure_usb_device(LIBMTP_raw_device_t *device, 1782 PTPParams *params, 1783 void **usbinfo) 1784 { 1785 PTP_USB *ptp_usb; 1786 struct usb_device *libusb_device; 1787 uint16_t ret = 0; 1788 struct usb_bus *bus; 1789 int found = 0; 1790 1791 /* See if we can find this raw device again... */ 1792 bus = init_usb(); 1793 for (; bus != NULL; bus = bus->next) { 1794 if (bus->location == device->bus_location) { 1795 struct usb_device *dev = bus->devices; 1796 1797 for (; dev != NULL; dev = dev->next) { 1798 if(dev->devnum == device->devnum && 1799 dev->descriptor.idVendor == device->device_entry.vendor_id && 1800 dev->descriptor.idProduct == device->device_entry.product_id ) { 1801 libusb_device = dev; 1802 found = 1; 1803 break; 1804 } 1805 } 1806 if (found) 1807 break; 1808 } 1809 } 1810 /* Device has gone since detecting raw devices! */ 1811 if (!found) { 1812 return LIBMTP_ERROR_NO_DEVICE_ATTACHED; 1813 } 1814 1815 /* Allocate structs */ 1816 ptp_usb = (PTP_USB *) malloc(sizeof(PTP_USB)); 1817 if (ptp_usb == NULL) { 1818 return LIBMTP_ERROR_MEMORY_ALLOCATION; 1819 } 1820 /* Start with a blank slate (includes setting device_flags to 0) */ 1821 memset(ptp_usb, 0, sizeof(PTP_USB)); 1822 1823 /* Copy the raw device */ 1824 memcpy(&ptp_usb->rawdevice, device, sizeof(LIBMTP_raw_device_t)); 1825 1826 /* 1827 * Some devices must have their "OS Descriptor" massaged in order 1828 * to work. 1829 */ 1830 if (FLAG_ALWAYS_PROBE_DESCRIPTOR(ptp_usb)) { 1831 // Massage the device descriptor 1832 (void) probe_device_descriptor(libusb_device, NULL); 1833 } 1834 1835 1836 /* Assign endpoints to usbinfo... */ 1837 find_interface_and_endpoints(libusb_device, 1838 &ptp_usb->interface, 1839 &ptp_usb->inep, 1840 &ptp_usb->inep_maxpacket, 1841 &ptp_usb->outep, 1842 &ptp_usb->outep_maxpacket, 1843 &ptp_usb->intep); 1844 1845 /* Attempt to initialize this device */ 1846 if (init_ptp_usb(params, ptp_usb, libusb_device) < 0) { 1847 fprintf(stderr, "LIBMTP PANIC: Unable to initialize device\n"); 1848 return LIBMTP_ERROR_CONNECTING; 1849 } 1850 1851 /* 1852 * This works in situations where previous bad applications 1853 * have not used LIBMTP_Release_Device on exit 1854 */ 1855 if ((ret = ptp_opensession(params, 1)) == PTP_ERROR_IO) { 1856 fprintf(stderr, "PTP_ERROR_IO: Trying again after re-initializing USB interface\n"); 1857 close_usb(ptp_usb); 1858 1859 if(init_ptp_usb(params, ptp_usb, libusb_device) <0) { 1860 fprintf(stderr, "LIBMTP PANIC: Could not open session on device\n"); 1861 return LIBMTP_ERROR_CONNECTING; 1862 } 1863 1864 /* Device has been reset, try again */ 1865 ret = ptp_opensession(params, 1); 1866 } 1867 1868 /* Was the transaction id invalid? Try again */ 1869 if (ret == PTP_RC_InvalidTransactionID) { 1870 fprintf(stderr, "LIBMTP WARNING: Transaction ID was invalid, increment and try again\n"); 1871 params->transaction_id += 10; 1872 ret = ptp_opensession(params, 1); 1873 } 1874 1875 if (ret != PTP_RC_SessionAlreadyOpened && ret != PTP_RC_OK) { 1876 fprintf(stderr, "LIBMTP PANIC: Could not open session! " 1877 "(Return code %d)\n Try to reset the device.\n", 1878 ret); 1879 usb_release_interface(ptp_usb->handle, 1880 (int) ptp_usb->interface); 1881 return LIBMTP_ERROR_CONNECTING; 1882 } 1883 1884 /* OK configured properly */ 1885 *usbinfo = (void *) ptp_usb; 1886 return LIBMTP_ERROR_NONE; 1887 } 1888 1889 1890 void close_device (PTP_USB *ptp_usb, PTPParams *params) 1891 { 1892 if (ptp_closesession(params)!=PTP_RC_OK) 1893 fprintf(stderr,"ERROR: Could not close session!\n"); 1894 close_usb(ptp_usb); 1895 } 1896 1897 void set_usb_device_timeout(PTP_USB *ptp_usb, int timeout) 1898 { 1899 ptp_usb->timeout = timeout; 1900 } 1901 1902 void get_usb_device_timeout(PTP_USB *ptp_usb, int *timeout) 1903 { 1904 *timeout = ptp_usb->timeout; 1905 } 1906 1907 static int usb_clear_stall_feature(PTP_USB* ptp_usb, int ep) 1908 { 1909 1910 return (usb_control_msg(ptp_usb->handle, 1911 USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE, USB_FEATURE_HALT, 1912 ep, NULL, 0, ptp_usb->timeout)); 1913 } 1914 1915 static int usb_get_endpoint_status(PTP_USB* ptp_usb, int ep, uint16_t* status) 1916 { 1917 return (usb_control_msg(ptp_usb->handle, 1918 USB_DP_DTH|USB_RECIP_ENDPOINT, USB_REQ_GET_STATUS, 1919 USB_FEATURE_HALT, ep, (char *)status, 2, ptp_usb->timeout)); 1920 } 1921
