libftdi1  1.3
ftdi.c
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1 /***************************************************************************
2  ftdi.c - description
3  -------------------
4  begin : Fri Apr 4 2003
5  copyright : (C) 2003-2014 by Intra2net AG and the libftdi developers
6  email : opensource@intra2net.com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU Lesser General Public License *
13  * version 2.1 as published by the Free Software Foundation; *
14  * *
15  ***************************************************************************/
16 
29 /* @{ */
30 
31 #include <libusb.h>
32 #include <string.h>
33 #include <errno.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 
37 #include "ftdi_i.h"
38 #include "ftdi.h"
39 #include "ftdi_version_i.h"
40 
41 #define ftdi_error_return(code, str) do { \
42  if ( ftdi ) \
43  ftdi->error_str = str; \
44  else \
45  fprintf(stderr, str); \
46  return code; \
47  } while(0);
48 
49 #define ftdi_error_return_free_device_list(code, str, devs) do { \
50  libusb_free_device_list(devs,1); \
51  ftdi->error_str = str; \
52  return code; \
53  } while(0);
54 
55 
65 static void ftdi_usb_close_internal (struct ftdi_context *ftdi)
66 {
67  if (ftdi && ftdi->usb_dev)
68  {
69  libusb_close (ftdi->usb_dev);
70  ftdi->usb_dev = NULL;
71  if(ftdi->eeprom)
72  ftdi->eeprom->initialized_for_connected_device = 0;
73  }
74 }
75 
88 int ftdi_init(struct ftdi_context *ftdi)
89 {
90  struct ftdi_eeprom* eeprom = (struct ftdi_eeprom *)malloc(sizeof(struct ftdi_eeprom));
91  ftdi->usb_ctx = NULL;
92  ftdi->usb_dev = NULL;
93  ftdi->usb_read_timeout = 5000;
94  ftdi->usb_write_timeout = 5000;
95 
96  ftdi->type = TYPE_BM; /* chip type */
97  ftdi->baudrate = -1;
98  ftdi->bitbang_enabled = 0; /* 0: normal mode 1: any of the bitbang modes enabled */
99 
100  ftdi->readbuffer = NULL;
101  ftdi->readbuffer_offset = 0;
102  ftdi->readbuffer_remaining = 0;
103  ftdi->writebuffer_chunksize = 4096;
104  ftdi->max_packet_size = 0;
105  ftdi->error_str = NULL;
106  ftdi->module_detach_mode = AUTO_DETACH_SIO_MODULE;
107 
108  if (libusb_init(&ftdi->usb_ctx) < 0)
109  ftdi_error_return(-3, "libusb_init() failed");
110 
111  ftdi_set_interface(ftdi, INTERFACE_ANY);
112  ftdi->bitbang_mode = 1; /* when bitbang is enabled this holds the number of the mode */
113 
114  if (eeprom == 0)
115  ftdi_error_return(-2, "Can't malloc struct ftdi_eeprom");
116  memset(eeprom, 0, sizeof(struct ftdi_eeprom));
117  ftdi->eeprom = eeprom;
118 
119  /* All fine. Now allocate the readbuffer */
120  return ftdi_read_data_set_chunksize(ftdi, 4096);
121 }
122 
128 struct ftdi_context *ftdi_new(void)
129 {
130  struct ftdi_context * ftdi = (struct ftdi_context *)malloc(sizeof(struct ftdi_context));
131 
132  if (ftdi == NULL)
133  {
134  return NULL;
135  }
136 
137  if (ftdi_init(ftdi) != 0)
138  {
139  free(ftdi);
140  return NULL;
141  }
142 
143  return ftdi;
144 }
145 
157 int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface)
158 {
159  if (ftdi == NULL)
160  ftdi_error_return(-2, "USB device unavailable");
161 
162  if (ftdi->usb_dev != NULL)
163  {
164  int check_interface = interface;
165  if (check_interface == INTERFACE_ANY)
166  check_interface = INTERFACE_A;
167 
168  if (ftdi->index != check_interface)
169  ftdi_error_return(-3, "Interface can not be changed on an already open device");
170  }
171 
172  switch (interface)
173  {
174  case INTERFACE_ANY:
175  case INTERFACE_A:
176  ftdi->interface = 0;
177  ftdi->index = INTERFACE_A;
178  ftdi->in_ep = 0x02;
179  ftdi->out_ep = 0x81;
180  break;
181  case INTERFACE_B:
182  ftdi->interface = 1;
183  ftdi->index = INTERFACE_B;
184  ftdi->in_ep = 0x04;
185  ftdi->out_ep = 0x83;
186  break;
187  case INTERFACE_C:
188  ftdi->interface = 2;
189  ftdi->index = INTERFACE_C;
190  ftdi->in_ep = 0x06;
191  ftdi->out_ep = 0x85;
192  break;
193  case INTERFACE_D:
194  ftdi->interface = 3;
195  ftdi->index = INTERFACE_D;
196  ftdi->in_ep = 0x08;
197  ftdi->out_ep = 0x87;
198  break;
199  default:
200  ftdi_error_return(-1, "Unknown interface");
201  }
202  return 0;
203 }
204 
210 void ftdi_deinit(struct ftdi_context *ftdi)
211 {
212  if (ftdi == NULL)
213  return;
214 
215  ftdi_usb_close_internal (ftdi);
216 
217  if (ftdi->readbuffer != NULL)
218  {
219  free(ftdi->readbuffer);
220  ftdi->readbuffer = NULL;
221  }
222 
223  if (ftdi->eeprom != NULL)
224  {
225  if (ftdi->eeprom->manufacturer != 0)
226  {
227  free(ftdi->eeprom->manufacturer);
228  ftdi->eeprom->manufacturer = 0;
229  }
230  if (ftdi->eeprom->product != 0)
231  {
232  free(ftdi->eeprom->product);
233  ftdi->eeprom->product = 0;
234  }
235  if (ftdi->eeprom->serial != 0)
236  {
237  free(ftdi->eeprom->serial);
238  ftdi->eeprom->serial = 0;
239  }
240  free(ftdi->eeprom);
241  ftdi->eeprom = NULL;
242  }
243 
244  if (ftdi->usb_ctx)
245  {
246  libusb_exit(ftdi->usb_ctx);
247  ftdi->usb_ctx = NULL;
248  }
249 }
250 
256 void ftdi_free(struct ftdi_context *ftdi)
257 {
258  ftdi_deinit(ftdi);
259  free(ftdi);
260 }
261 
268 void ftdi_set_usbdev (struct ftdi_context *ftdi, libusb_device_handle *usb)
269 {
270  if (ftdi == NULL)
271  return;
272 
273  ftdi->usb_dev = usb;
274 }
275 
281 struct ftdi_version_info ftdi_get_library_version(void)
282 {
283  struct ftdi_version_info ver;
284 
285  ver.major = FTDI_MAJOR_VERSION;
286  ver.minor = FTDI_MINOR_VERSION;
287  ver.micro = FTDI_MICRO_VERSION;
288  ver.version_str = FTDI_VERSION_STRING;
289  ver.snapshot_str = FTDI_SNAPSHOT_VERSION;
290 
291  return ver;
292 }
293 
310 int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product)
311 {
312  struct ftdi_device_list **curdev;
313  libusb_device *dev;
314  libusb_device **devs;
315  int count = 0;
316  int i = 0;
317 
318  if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
319  ftdi_error_return(-5, "libusb_get_device_list() failed");
320 
321  curdev = devlist;
322  *curdev = NULL;
323 
324  while ((dev = devs[i++]) != NULL)
325  {
326  struct libusb_device_descriptor desc;
327 
328  if (libusb_get_device_descriptor(dev, &desc) < 0)
329  ftdi_error_return_free_device_list(-6, "libusb_get_device_descriptor() failed", devs);
330 
331  if (((vendor || product) &&
332  desc.idVendor == vendor && desc.idProduct == product) ||
333  (!(vendor || product) &&
334  (desc.idVendor == 0x403) && (desc.idProduct == 0x6001 || desc.idProduct == 0x6010
335  || desc.idProduct == 0x6011 || desc.idProduct == 0x6014
336  || desc.idProduct == 0x6015)))
337  {
338  *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
339  if (!*curdev)
340  ftdi_error_return_free_device_list(-3, "out of memory", devs);
341 
342  (*curdev)->next = NULL;
343  (*curdev)->dev = dev;
344  libusb_ref_device(dev);
345  curdev = &(*curdev)->next;
346  count++;
347  }
348  }
349  libusb_free_device_list(devs,1);
350  return count;
351 }
352 
358 void ftdi_list_free(struct ftdi_device_list **devlist)
359 {
360  struct ftdi_device_list *curdev, *next;
361 
362  for (curdev = *devlist; curdev != NULL;)
363  {
364  next = curdev->next;
365  libusb_unref_device(curdev->dev);
366  free(curdev);
367  curdev = next;
368  }
369 
370  *devlist = NULL;
371 }
372 
378 void ftdi_list_free2(struct ftdi_device_list *devlist)
379 {
380  ftdi_list_free(&devlist);
381 }
382 
409 int ftdi_usb_get_strings(struct ftdi_context *ftdi,
410  struct libusb_device *dev,
411  char *manufacturer, int mnf_len,
412  char *description, int desc_len,
413  char *serial, int serial_len)
414 {
415  int ret;
416 
417  if ((ftdi==NULL) || (dev==NULL))
418  return -1;
419 
420  if (ftdi->usb_dev == NULL && libusb_open(dev, &ftdi->usb_dev) < 0)
421  ftdi_error_return(-4, "libusb_open() failed");
422 
423  // ftdi->usb_dev will not be NULL when entering ftdi_usb_get_strings2(), so
424  // it won't be closed either. This allows us to close it whether we actually
425  // called libusb_open() up above or not. This matches the expected behavior
426  // (and note) for ftdi_usb_get_strings().
427  ret = ftdi_usb_get_strings2(ftdi, dev,
428  manufacturer, mnf_len,
429  description, desc_len,
430  serial, serial_len);
431 
432  // only close it if it was successful, as all other return codes close
433  // before returning already.
434  if (ret == 0)
435  ftdi_usb_close_internal(ftdi);
436 
437  return ret;
438 }
439 
466 int ftdi_usb_get_strings2(struct ftdi_context *ftdi, struct libusb_device *dev,
467  char *manufacturer, int mnf_len,
468  char *description, int desc_len,
469  char *serial, int serial_len)
470 {
471  struct libusb_device_descriptor desc;
472 
473  if ((ftdi==NULL) || (dev==NULL))
474  return -1;
475 
476  char need_open = (ftdi->usb_dev == NULL);
477  if (need_open && libusb_open(dev, &ftdi->usb_dev) < 0)
478  ftdi_error_return(-4, "libusb_open() failed");
479 
480  if (libusb_get_device_descriptor(dev, &desc) < 0)
481  ftdi_error_return(-11, "libusb_get_device_descriptor() failed");
482 
483  if (manufacturer != NULL)
484  {
485  if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iManufacturer, (unsigned char *)manufacturer, mnf_len) < 0)
486  {
487  ftdi_usb_close_internal (ftdi);
488  ftdi_error_return(-7, "libusb_get_string_descriptor_ascii() failed");
489  }
490  }
491 
492  if (description != NULL)
493  {
494  if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)description, desc_len) < 0)
495  {
496  ftdi_usb_close_internal (ftdi);
497  ftdi_error_return(-8, "libusb_get_string_descriptor_ascii() failed");
498  }
499  }
500 
501  if (serial != NULL)
502  {
503  if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)serial, serial_len) < 0)
504  {
505  ftdi_usb_close_internal (ftdi);
506  ftdi_error_return(-9, "libusb_get_string_descriptor_ascii() failed");
507  }
508  }
509 
510  if (need_open)
511  ftdi_usb_close_internal (ftdi);
512 
513  return 0;
514 }
515 
522 static unsigned int _ftdi_determine_max_packet_size(struct ftdi_context *ftdi, libusb_device *dev)
523 {
524  struct libusb_device_descriptor desc;
525  struct libusb_config_descriptor *config0;
526  unsigned int packet_size;
527 
528  // Sanity check
529  if (ftdi == NULL || dev == NULL)
530  return 64;
531 
532  // Determine maximum packet size. Init with default value.
533  // New hi-speed devices from FTDI use a packet size of 512 bytes
534  // but could be connected to a normal speed USB hub -> 64 bytes packet size.
535  if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H)
536  packet_size = 512;
537  else
538  packet_size = 64;
539 
540  if (libusb_get_device_descriptor(dev, &desc) < 0)
541  return packet_size;
542 
543  if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
544  return packet_size;
545 
546  if (desc.bNumConfigurations > 0)
547  {
548  if (ftdi->interface < config0->bNumInterfaces)
549  {
550  struct libusb_interface interface = config0->interface[ftdi->interface];
551  if (interface.num_altsetting > 0)
552  {
553  struct libusb_interface_descriptor descriptor = interface.altsetting[0];
554  if (descriptor.bNumEndpoints > 0)
555  {
556  packet_size = descriptor.endpoint[0].wMaxPacketSize;
557  }
558  }
559  }
560  }
561 
562  libusb_free_config_descriptor (config0);
563  return packet_size;
564 }
565 
584 int ftdi_usb_open_dev(struct ftdi_context *ftdi, libusb_device *dev)
585 {
586  struct libusb_device_descriptor desc;
587  struct libusb_config_descriptor *config0;
588  int cfg, cfg0, detach_errno = 0;
589 
590  if (ftdi == NULL)
591  ftdi_error_return(-8, "ftdi context invalid");
592 
593  if (libusb_open(dev, &ftdi->usb_dev) < 0)
594  ftdi_error_return(-4, "libusb_open() failed");
595 
596  if (libusb_get_device_descriptor(dev, &desc) < 0)
597  ftdi_error_return(-9, "libusb_get_device_descriptor() failed");
598 
599  if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
600  ftdi_error_return(-10, "libusb_get_config_descriptor() failed");
601  cfg0 = config0->bConfigurationValue;
602  libusb_free_config_descriptor (config0);
603 
604  // Try to detach ftdi_sio kernel module.
605  //
606  // The return code is kept in a separate variable and only parsed
607  // if usb_set_configuration() or usb_claim_interface() fails as the
608  // detach operation might be denied and everything still works fine.
609  // Likely scenario is a static ftdi_sio kernel module.
610  if (ftdi->module_detach_mode == AUTO_DETACH_SIO_MODULE)
611  {
612  if (libusb_detach_kernel_driver(ftdi->usb_dev, ftdi->interface) !=0)
613  detach_errno = errno;
614  }
615 
616  if (libusb_get_configuration (ftdi->usb_dev, &cfg) < 0)
617  ftdi_error_return(-12, "libusb_get_configuration () failed");
618  // set configuration (needed especially for windows)
619  // tolerate EBUSY: one device with one configuration, but two interfaces
620  // and libftdi sessions to both interfaces (e.g. FT2232)
621  if (desc.bNumConfigurations > 0 && cfg != cfg0)
622  {
623  if (libusb_set_configuration(ftdi->usb_dev, cfg0) < 0)
624  {
625  ftdi_usb_close_internal (ftdi);
626  if (detach_errno == EPERM)
627  {
628  ftdi_error_return(-8, "inappropriate permissions on device!");
629  }
630  else
631  {
632  ftdi_error_return(-3, "unable to set usb configuration. Make sure the default FTDI driver is not in use");
633  }
634  }
635  }
636 
637  if (libusb_claim_interface(ftdi->usb_dev, ftdi->interface) < 0)
638  {
639  ftdi_usb_close_internal (ftdi);
640  if (detach_errno == EPERM)
641  {
642  ftdi_error_return(-8, "inappropriate permissions on device!");
643  }
644  else
645  {
646  ftdi_error_return(-5, "unable to claim usb device. Make sure the default FTDI driver is not in use");
647  }
648  }
649 
650  if (ftdi_usb_reset (ftdi) != 0)
651  {
652  ftdi_usb_close_internal (ftdi);
653  ftdi_error_return(-6, "ftdi_usb_reset failed");
654  }
655 
656  // Try to guess chip type
657  // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0
658  if (desc.bcdDevice == 0x400 || (desc.bcdDevice == 0x200
659  && desc.iSerialNumber == 0))
660  ftdi->type = TYPE_BM;
661  else if (desc.bcdDevice == 0x200)
662  ftdi->type = TYPE_AM;
663  else if (desc.bcdDevice == 0x500)
664  ftdi->type = TYPE_2232C;
665  else if (desc.bcdDevice == 0x600)
666  ftdi->type = TYPE_R;
667  else if (desc.bcdDevice == 0x700)
668  ftdi->type = TYPE_2232H;
669  else if (desc.bcdDevice == 0x800)
670  ftdi->type = TYPE_4232H;
671  else if (desc.bcdDevice == 0x900)
672  ftdi->type = TYPE_232H;
673  else if (desc.bcdDevice == 0x1000)
674  ftdi->type = TYPE_230X;
675 
676  // Determine maximum packet size
677  ftdi->max_packet_size = _ftdi_determine_max_packet_size(ftdi, dev);
678 
679  if (ftdi_set_baudrate (ftdi, 9600) != 0)
680  {
681  ftdi_usb_close_internal (ftdi);
682  ftdi_error_return(-7, "set baudrate failed");
683  }
684 
685  ftdi_error_return(0, "all fine");
686 }
687 
697 int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
698 {
699  return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
700 }
701 
723 int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
724  const char* description, const char* serial)
725 {
726  return ftdi_usb_open_desc_index(ftdi,vendor,product,description,serial,0);
727 }
728 
753 int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int vendor, int product,
754  const char* description, const char* serial, unsigned int index)
755 {
756  libusb_device *dev;
757  libusb_device **devs;
758  char string[256];
759  int i = 0;
760 
761  if (ftdi == NULL)
762  ftdi_error_return(-11, "ftdi context invalid");
763 
764  if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
765  ftdi_error_return(-12, "libusb_get_device_list() failed");
766 
767  while ((dev = devs[i++]) != NULL)
768  {
769  struct libusb_device_descriptor desc;
770  int res;
771 
772  if (libusb_get_device_descriptor(dev, &desc) < 0)
773  ftdi_error_return_free_device_list(-13, "libusb_get_device_descriptor() failed", devs);
774 
775  if (desc.idVendor == vendor && desc.idProduct == product)
776  {
777  if (libusb_open(dev, &ftdi->usb_dev) < 0)
778  ftdi_error_return_free_device_list(-4, "usb_open() failed", devs);
779 
780  if (description != NULL)
781  {
782  if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)string, sizeof(string)) < 0)
783  {
784  ftdi_usb_close_internal (ftdi);
785  ftdi_error_return_free_device_list(-8, "unable to fetch product description", devs);
786  }
787  if (strncmp(string, description, sizeof(string)) != 0)
788  {
789  ftdi_usb_close_internal (ftdi);
790  continue;
791  }
792  }
793  if (serial != NULL)
794  {
795  if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)string, sizeof(string)) < 0)
796  {
797  ftdi_usb_close_internal (ftdi);
798  ftdi_error_return_free_device_list(-9, "unable to fetch serial number", devs);
799  }
800  if (strncmp(string, serial, sizeof(string)) != 0)
801  {
802  ftdi_usb_close_internal (ftdi);
803  continue;
804  }
805  }
806 
807  ftdi_usb_close_internal (ftdi);
808 
809  if (index > 0)
810  {
811  index--;
812  continue;
813  }
814 
815  res = ftdi_usb_open_dev(ftdi, dev);
816  libusb_free_device_list(devs,1);
817  return res;
818  }
819  }
820 
821  // device not found
822  ftdi_error_return_free_device_list(-3, "device not found", devs);
823 }
824 
851 int ftdi_usb_open_string(struct ftdi_context *ftdi, const char* description)
852 {
853  if (ftdi == NULL)
854  ftdi_error_return(-12, "ftdi context invalid");
855 
856  if (description[0] == 0 || description[1] != ':')
857  ftdi_error_return(-11, "illegal description format");
858 
859  if (description[0] == 'd')
860  {
861  libusb_device *dev;
862  libusb_device **devs;
863  unsigned int bus_number, device_address;
864  int i = 0;
865 
866  if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
867  ftdi_error_return(-2, "libusb_get_device_list() failed");
868 
869  /* XXX: This doesn't handle symlinks/odd paths/etc... */
870  if (sscanf (description + 2, "%u/%u", &bus_number, &device_address) != 2)
871  ftdi_error_return_free_device_list(-11, "illegal description format", devs);
872 
873  while ((dev = devs[i++]) != NULL)
874  {
875  int ret;
876  if (bus_number == libusb_get_bus_number (dev)
877  && device_address == libusb_get_device_address (dev))
878  {
879  ret = ftdi_usb_open_dev(ftdi, dev);
880  libusb_free_device_list(devs,1);
881  return ret;
882  }
883  }
884 
885  // device not found
886  ftdi_error_return_free_device_list(-3, "device not found", devs);
887  }
888  else if (description[0] == 'i' || description[0] == 's')
889  {
890  unsigned int vendor;
891  unsigned int product;
892  unsigned int index=0;
893  const char *serial=NULL;
894  const char *startp, *endp;
895 
896  errno=0;
897  startp=description+2;
898  vendor=strtoul((char*)startp,(char**)&endp,0);
899  if (*endp != ':' || endp == startp || errno != 0)
900  ftdi_error_return(-11, "illegal description format");
901 
902  startp=endp+1;
903  product=strtoul((char*)startp,(char**)&endp,0);
904  if (endp == startp || errno != 0)
905  ftdi_error_return(-11, "illegal description format");
906 
907  if (description[0] == 'i' && *endp != 0)
908  {
909  /* optional index field in i-mode */
910  if (*endp != ':')
911  ftdi_error_return(-11, "illegal description format");
912 
913  startp=endp+1;
914  index=strtoul((char*)startp,(char**)&endp,0);
915  if (*endp != 0 || endp == startp || errno != 0)
916  ftdi_error_return(-11, "illegal description format");
917  }
918  if (description[0] == 's')
919  {
920  if (*endp != ':')
921  ftdi_error_return(-11, "illegal description format");
922 
923  /* rest of the description is the serial */
924  serial=endp+1;
925  }
926 
927  return ftdi_usb_open_desc_index(ftdi, vendor, product, NULL, serial, index);
928  }
929  else
930  {
931  ftdi_error_return(-11, "illegal description format");
932  }
933 }
934 
944 int ftdi_usb_reset(struct ftdi_context *ftdi)
945 {
946  if (ftdi == NULL || ftdi->usb_dev == NULL)
947  ftdi_error_return(-2, "USB device unavailable");
948 
949  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
950  SIO_RESET_REQUEST, SIO_RESET_SIO,
951  ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
952  ftdi_error_return(-1,"FTDI reset failed");
953 
954  // Invalidate data in the readbuffer
955  ftdi->readbuffer_offset = 0;
956  ftdi->readbuffer_remaining = 0;
957 
958  return 0;
959 }
960 
970 int ftdi_usb_purge_rx_buffer(struct ftdi_context *ftdi)
971 {
972  if (ftdi == NULL || ftdi->usb_dev == NULL)
973  ftdi_error_return(-2, "USB device unavailable");
974 
975  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
976  SIO_RESET_REQUEST, SIO_RESET_PURGE_RX,
977  ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
978  ftdi_error_return(-1, "FTDI purge of RX buffer failed");
979 
980  // Invalidate data in the readbuffer
981  ftdi->readbuffer_offset = 0;
982  ftdi->readbuffer_remaining = 0;
983 
984  return 0;
985 }
986 
996 int ftdi_usb_purge_tx_buffer(struct ftdi_context *ftdi)
997 {
998  if (ftdi == NULL || ftdi->usb_dev == NULL)
999  ftdi_error_return(-2, "USB device unavailable");
1000 
1001  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1002  SIO_RESET_REQUEST, SIO_RESET_PURGE_TX,
1003  ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1004  ftdi_error_return(-1, "FTDI purge of TX buffer failed");
1005 
1006  return 0;
1007 }
1008 
1019 int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
1020 {
1021  int result;
1022 
1023  if (ftdi == NULL || ftdi->usb_dev == NULL)
1024  ftdi_error_return(-3, "USB device unavailable");
1025 
1026  result = ftdi_usb_purge_rx_buffer(ftdi);
1027  if (result < 0)
1028  return -1;
1029 
1030  result = ftdi_usb_purge_tx_buffer(ftdi);
1031  if (result < 0)
1032  return -2;
1033 
1034  return 0;
1035 }
1036 
1037 
1038 
1048 int ftdi_usb_close(struct ftdi_context *ftdi)
1049 {
1050  int rtn = 0;
1051 
1052  if (ftdi == NULL)
1053  ftdi_error_return(-3, "ftdi context invalid");
1054 
1055  if (ftdi->usb_dev != NULL)
1056  if (libusb_release_interface(ftdi->usb_dev, ftdi->interface) < 0)
1057  rtn = -1;
1058 
1059  ftdi_usb_close_internal (ftdi);
1060 
1061  return rtn;
1062 }
1063 
1064 /* ftdi_to_clkbits_AM For the AM device, convert a requested baudrate
1065  to encoded divisor and the achievable baudrate
1066  Function is only used internally
1067  \internal
1068 
1069  See AN120
1070  clk/1 -> 0
1071  clk/1.5 -> 1
1072  clk/2 -> 2
1073  From /2, 0.125/ 0.25 and 0.5 steps may be taken
1074  The fractional part has frac_code encoding
1075 */
1076 static int ftdi_to_clkbits_AM(int baudrate, unsigned long *encoded_divisor)
1077 
1078 {
1079  static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
1080  static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
1081  static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
1082  int divisor, best_divisor, best_baud, best_baud_diff;
1083  int i;
1084  divisor = 24000000 / baudrate;
1085 
1086  // Round down to supported fraction (AM only)
1087  divisor -= am_adjust_dn[divisor & 7];
1088 
1089  // Try this divisor and the one above it (because division rounds down)
1090  best_divisor = 0;
1091  best_baud = 0;
1092  best_baud_diff = 0;
1093  for (i = 0; i < 2; i++)
1094  {
1095  int try_divisor = divisor + i;
1096  int baud_estimate;
1097  int baud_diff;
1098 
1099  // Round up to supported divisor value
1100  if (try_divisor <= 8)
1101  {
1102  // Round up to minimum supported divisor
1103  try_divisor = 8;
1104  }
1105  else if (divisor < 16)
1106  {
1107  // AM doesn't support divisors 9 through 15 inclusive
1108  try_divisor = 16;
1109  }
1110  else
1111  {
1112  // Round up to supported fraction (AM only)
1113  try_divisor += am_adjust_up[try_divisor & 7];
1114  if (try_divisor > 0x1FFF8)
1115  {
1116  // Round down to maximum supported divisor value (for AM)
1117  try_divisor = 0x1FFF8;
1118  }
1119  }
1120  // Get estimated baud rate (to nearest integer)
1121  baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor;
1122  // Get absolute difference from requested baud rate
1123  if (baud_estimate < baudrate)
1124  {
1125  baud_diff = baudrate - baud_estimate;
1126  }
1127  else
1128  {
1129  baud_diff = baud_estimate - baudrate;
1130  }
1131  if (i == 0 || baud_diff < best_baud_diff)
1132  {
1133  // Closest to requested baud rate so far
1134  best_divisor = try_divisor;
1135  best_baud = baud_estimate;
1136  best_baud_diff = baud_diff;
1137  if (baud_diff == 0)
1138  {
1139  // Spot on! No point trying
1140  break;
1141  }
1142  }
1143  }
1144  // Encode the best divisor value
1145  *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
1146  // Deal with special cases for encoded value
1147  if (*encoded_divisor == 1)
1148  {
1149  *encoded_divisor = 0; // 3000000 baud
1150  }
1151  else if (*encoded_divisor == 0x4001)
1152  {
1153  *encoded_divisor = 1; // 2000000 baud (BM only)
1154  }
1155  return best_baud;
1156 }
1157 
1158 /* ftdi_to_clkbits Convert a requested baudrate for a given system clock and predivisor
1159  to encoded divisor and the achievable baudrate
1160  Function is only used internally
1161  \internal
1162 
1163  See AN120
1164  clk/1 -> 0
1165  clk/1.5 -> 1
1166  clk/2 -> 2
1167  From /2, 0.125 steps may be taken.
1168  The fractional part has frac_code encoding
1169 
1170  value[13:0] of value is the divisor
1171  index[9] mean 12 MHz Base(120 MHz/10) rate versus 3 MHz (48 MHz/16) else
1172 
1173  H Type have all features above with
1174  {index[8],value[15:14]} is the encoded subdivisor
1175 
1176  FT232R, FT2232 and FT232BM have no option for 12 MHz and with
1177  {index[0],value[15:14]} is the encoded subdivisor
1178 
1179  AM Type chips have only four fractional subdivisors at value[15:14]
1180  for subdivisors 0, 0.5, 0.25, 0.125
1181 */
1182 static int ftdi_to_clkbits(int baudrate, unsigned int clk, int clk_div, unsigned long *encoded_divisor)
1183 {
1184  static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
1185  int best_baud = 0;
1186  int divisor, best_divisor;
1187  if (baudrate >= clk/clk_div)
1188  {
1189  *encoded_divisor = 0;
1190  best_baud = clk/clk_div;
1191  }
1192  else if (baudrate >= clk/(clk_div + clk_div/2))
1193  {
1194  *encoded_divisor = 1;
1195  best_baud = clk/(clk_div + clk_div/2);
1196  }
1197  else if (baudrate >= clk/(2*clk_div))
1198  {
1199  *encoded_divisor = 2;
1200  best_baud = clk/(2*clk_div);
1201  }
1202  else
1203  {
1204  /* We divide by 16 to have 3 fractional bits and one bit for rounding */
1205  divisor = clk*16/clk_div / baudrate;
1206  if (divisor & 1) /* Decide if to round up or down*/
1207  best_divisor = divisor /2 +1;
1208  else
1209  best_divisor = divisor/2;
1210  if(best_divisor > 0x20000)
1211  best_divisor = 0x1ffff;
1212  best_baud = clk*16/clk_div/best_divisor;
1213  if (best_baud & 1) /* Decide if to round up or down*/
1214  best_baud = best_baud /2 +1;
1215  else
1216  best_baud = best_baud /2;
1217  *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 0x7] << 14);
1218  }
1219  return best_baud;
1220 }
1226 static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
1227  unsigned short *value, unsigned short *index)
1228 {
1229  int best_baud;
1230  unsigned long encoded_divisor;
1231 
1232  if (baudrate <= 0)
1233  {
1234  // Return error
1235  return -1;
1236  }
1237 
1238 #define H_CLK 120000000
1239 #define C_CLK 48000000
1240  if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H) || (ftdi->type == TYPE_232H))
1241  {
1242  if(baudrate*10 > H_CLK /0x3fff)
1243  {
1244  /* On H Devices, use 12 000 000 Baudrate when possible
1245  We have a 14 bit divisor, a 1 bit divisor switch (10 or 16)
1246  three fractional bits and a 120 MHz clock
1247  Assume AN_120 "Sub-integer divisors between 0 and 2 are not allowed" holds for
1248  DIV/10 CLK too, so /1, /1.5 and /2 can be handled the same*/
1249  best_baud = ftdi_to_clkbits(baudrate, H_CLK, 10, &encoded_divisor);
1250  encoded_divisor |= 0x20000; /* switch on CLK/10*/
1251  }
1252  else
1253  best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1254  }
1255  else if ((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C) || (ftdi->type == TYPE_R ))
1256  {
1257  best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1258  }
1259  else
1260  {
1261  best_baud = ftdi_to_clkbits_AM(baudrate, &encoded_divisor);
1262  }
1263  // Split into "value" and "index" values
1264  *value = (unsigned short)(encoded_divisor & 0xFFFF);
1265  if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H)
1266  {
1267  *index = (unsigned short)(encoded_divisor >> 8);
1268  *index &= 0xFF00;
1269  *index |= ftdi->index;
1270  }
1271  else
1272  *index = (unsigned short)(encoded_divisor >> 16);
1273 
1274  // Return the nearest baud rate
1275  return best_baud;
1276 }
1277 
1282 int convert_baudrate_UT_export(int baudrate, struct ftdi_context *ftdi,
1283  unsigned short *value, unsigned short *index)
1284 {
1285  return ftdi_convert_baudrate(baudrate, ftdi, value, index);
1286 }
1287 
1299 int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
1300 {
1301  unsigned short value, index;
1302  int actual_baudrate;
1303 
1304  if (ftdi == NULL || ftdi->usb_dev == NULL)
1305  ftdi_error_return(-3, "USB device unavailable");
1306 
1307  if (ftdi->bitbang_enabled)
1308  {
1309  baudrate = baudrate*4;
1310  }
1311 
1312  actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index);
1313  if (actual_baudrate <= 0)
1314  ftdi_error_return (-1, "Silly baudrate <= 0.");
1315 
1316  // Check within tolerance (about 5%)
1317  if ((actual_baudrate * 2 < baudrate /* Catch overflows */ )
1318  || ((actual_baudrate < baudrate)
1319  ? (actual_baudrate * 21 < baudrate * 20)
1320  : (baudrate * 21 < actual_baudrate * 20)))
1321  ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4");
1322 
1323  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1324  SIO_SET_BAUDRATE_REQUEST, value,
1325  index, NULL, 0, ftdi->usb_write_timeout) < 0)
1326  ftdi_error_return (-2, "Setting new baudrate failed");
1327 
1328  ftdi->baudrate = baudrate;
1329  return 0;
1330 }
1331 
1345 int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
1346  enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity)
1347 {
1348  return ftdi_set_line_property2(ftdi, bits, sbit, parity, BREAK_OFF);
1349 }
1350 
1364 int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
1365  enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity,
1366  enum ftdi_break_type break_type)
1367 {
1368  unsigned short value = bits;
1369 
1370  if (ftdi == NULL || ftdi->usb_dev == NULL)
1371  ftdi_error_return(-2, "USB device unavailable");
1372 
1373  switch (parity)
1374  {
1375  case NONE:
1376  value |= (0x00 << 8);
1377  break;
1378  case ODD:
1379  value |= (0x01 << 8);
1380  break;
1381  case EVEN:
1382  value |= (0x02 << 8);
1383  break;
1384  case MARK:
1385  value |= (0x03 << 8);
1386  break;
1387  case SPACE:
1388  value |= (0x04 << 8);
1389  break;
1390  }
1391 
1392  switch (sbit)
1393  {
1394  case STOP_BIT_1:
1395  value |= (0x00 << 11);
1396  break;
1397  case STOP_BIT_15:
1398  value |= (0x01 << 11);
1399  break;
1400  case STOP_BIT_2:
1401  value |= (0x02 << 11);
1402  break;
1403  }
1404 
1405  switch (break_type)
1406  {
1407  case BREAK_OFF:
1408  value |= (0x00 << 14);
1409  break;
1410  case BREAK_ON:
1411  value |= (0x01 << 14);
1412  break;
1413  }
1414 
1415  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1416  SIO_SET_DATA_REQUEST, value,
1417  ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1418  ftdi_error_return (-1, "Setting new line property failed");
1419 
1420  return 0;
1421 }
1422 
1434 int ftdi_write_data(struct ftdi_context *ftdi, const unsigned char *buf, int size)
1435 {
1436  int offset = 0;
1437  int actual_length;
1438 
1439  if (ftdi == NULL || ftdi->usb_dev == NULL)
1440  ftdi_error_return(-666, "USB device unavailable");
1441 
1442  while (offset < size)
1443  {
1444  int write_size = ftdi->writebuffer_chunksize;
1445 
1446  if (offset+write_size > size)
1447  write_size = size-offset;
1448 
1449  if (libusb_bulk_transfer(ftdi->usb_dev, ftdi->in_ep, (unsigned char *)buf+offset, write_size, &actual_length, ftdi->usb_write_timeout) < 0)
1450  ftdi_error_return(-1, "usb bulk write failed");
1451 
1452  offset += actual_length;
1453  }
1454 
1455  return offset;
1456 }
1457 
1458 static void LIBUSB_CALL ftdi_read_data_cb(struct libusb_transfer *transfer)
1459 {
1460  struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1461  struct ftdi_context *ftdi = tc->ftdi;
1462  int packet_size, actual_length, num_of_chunks, chunk_remains, i, ret;
1463 
1464  packet_size = ftdi->max_packet_size;
1465 
1466  actual_length = transfer->actual_length;
1467 
1468  if (actual_length > 2)
1469  {
1470  // skip FTDI status bytes.
1471  // Maybe stored in the future to enable modem use
1472  num_of_chunks = actual_length / packet_size;
1473  chunk_remains = actual_length % packet_size;
1474  //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
1475 
1476  ftdi->readbuffer_offset += 2;
1477  actual_length -= 2;
1478 
1479  if (actual_length > packet_size - 2)
1480  {
1481  for (i = 1; i < num_of_chunks; i++)
1482  memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1483  ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1484  packet_size - 2);
1485  if (chunk_remains > 2)
1486  {
1487  memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1488  ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1489  chunk_remains-2);
1490  actual_length -= 2*num_of_chunks;
1491  }
1492  else
1493  actual_length -= 2*(num_of_chunks-1)+chunk_remains;
1494  }
1495 
1496  if (actual_length > 0)
1497  {
1498  // data still fits in buf?
1499  if (tc->offset + actual_length <= tc->size)
1500  {
1501  memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, actual_length);
1502  //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
1503  tc->offset += actual_length;
1504 
1505  ftdi->readbuffer_offset = 0;
1506  ftdi->readbuffer_remaining = 0;
1507 
1508  /* Did we read exactly the right amount of bytes? */
1509  if (tc->offset == tc->size)
1510  {
1511  //printf("read_data exact rem %d offset %d\n",
1512  //ftdi->readbuffer_remaining, offset);
1513  tc->completed = 1;
1514  return;
1515  }
1516  }
1517  else
1518  {
1519  // only copy part of the data or size <= readbuffer_chunksize
1520  int part_size = tc->size - tc->offset;
1521  memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, part_size);
1522  tc->offset += part_size;
1523 
1524  ftdi->readbuffer_offset += part_size;
1525  ftdi->readbuffer_remaining = actual_length - part_size;
1526 
1527  /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
1528  part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
1529  tc->completed = 1;
1530  return;
1531  }
1532  }
1533  }
1534 
1535  if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
1536  tc->completed = LIBUSB_TRANSFER_CANCELLED;
1537  else
1538  {
1539  ret = libusb_submit_transfer (transfer);
1540  if (ret < 0)
1541  tc->completed = 1;
1542  }
1543 }
1544 
1545 
1546 static void LIBUSB_CALL ftdi_write_data_cb(struct libusb_transfer *transfer)
1547 {
1548  struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1549  struct ftdi_context *ftdi = tc->ftdi;
1550 
1551  tc->offset += transfer->actual_length;
1552 
1553  if (tc->offset == tc->size)
1554  {
1555  tc->completed = 1;
1556  }
1557  else
1558  {
1559  int write_size = ftdi->writebuffer_chunksize;
1560  int ret;
1561 
1562  if (tc->offset + write_size > tc->size)
1563  write_size = tc->size - tc->offset;
1564 
1565  transfer->length = write_size;
1566  transfer->buffer = tc->buf + tc->offset;
1567 
1568  if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
1569  tc->completed = LIBUSB_TRANSFER_CANCELLED;
1570  else
1571  {
1572  ret = libusb_submit_transfer (transfer);
1573  if (ret < 0)
1574  tc->completed = 1;
1575  }
1576  }
1577 }
1578 
1579 
1594 struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
1595 {
1596  struct ftdi_transfer_control *tc;
1597  struct libusb_transfer *transfer;
1598  int write_size, ret;
1599 
1600  if (ftdi == NULL || ftdi->usb_dev == NULL)
1601  return NULL;
1602 
1603  tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
1604  if (!tc)
1605  return NULL;
1606 
1607  transfer = libusb_alloc_transfer(0);
1608  if (!transfer)
1609  {
1610  free(tc);
1611  return NULL;
1612  }
1613 
1614  tc->ftdi = ftdi;
1615  tc->completed = 0;
1616  tc->buf = buf;
1617  tc->size = size;
1618  tc->offset = 0;
1619 
1620  if (size < (int)ftdi->writebuffer_chunksize)
1621  write_size = size;
1622  else
1623  write_size = ftdi->writebuffer_chunksize;
1624 
1625  libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->in_ep, buf,
1626  write_size, ftdi_write_data_cb, tc,
1627  ftdi->usb_write_timeout);
1628  transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1629 
1630  ret = libusb_submit_transfer(transfer);
1631  if (ret < 0)
1632  {
1633  libusb_free_transfer(transfer);
1634  free(tc);
1635  return NULL;
1636  }
1637  tc->transfer = transfer;
1638 
1639  return tc;
1640 }
1641 
1656 struct ftdi_transfer_control *ftdi_read_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
1657 {
1658  struct ftdi_transfer_control *tc;
1659  struct libusb_transfer *transfer;
1660  int ret;
1661 
1662  if (ftdi == NULL || ftdi->usb_dev == NULL)
1663  return NULL;
1664 
1665  tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
1666  if (!tc)
1667  return NULL;
1668 
1669  tc->ftdi = ftdi;
1670  tc->buf = buf;
1671  tc->size = size;
1672 
1673  if (size <= (int)ftdi->readbuffer_remaining)
1674  {
1675  memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
1676 
1677  // Fix offsets
1678  ftdi->readbuffer_remaining -= size;
1679  ftdi->readbuffer_offset += size;
1680 
1681  /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
1682 
1683  tc->completed = 1;
1684  tc->offset = size;
1685  tc->transfer = NULL;
1686  return tc;
1687  }
1688 
1689  tc->completed = 0;
1690  if (ftdi->readbuffer_remaining != 0)
1691  {
1692  memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
1693 
1694  tc->offset = ftdi->readbuffer_remaining;
1695  }
1696  else
1697  tc->offset = 0;
1698 
1699  transfer = libusb_alloc_transfer(0);
1700  if (!transfer)
1701  {
1702  free (tc);
1703  return NULL;
1704  }
1705 
1706  ftdi->readbuffer_remaining = 0;
1707  ftdi->readbuffer_offset = 0;
1708 
1709  libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi_read_data_cb, tc, ftdi->usb_read_timeout);
1710  transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1711 
1712  ret = libusb_submit_transfer(transfer);
1713  if (ret < 0)
1714  {
1715  libusb_free_transfer(transfer);
1716  free (tc);
1717  return NULL;
1718  }
1719  tc->transfer = transfer;
1720 
1721  return tc;
1722 }
1723 
1735 int ftdi_transfer_data_done(struct ftdi_transfer_control *tc)
1736 {
1737  int ret;
1738  struct timeval to = { 0, 0 };
1739  while (!tc->completed)
1740  {
1741  ret = libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
1742  &to, &tc->completed);
1743  if (ret < 0)
1744  {
1745  if (ret == LIBUSB_ERROR_INTERRUPTED)
1746  continue;
1747  libusb_cancel_transfer(tc->transfer);
1748  while (!tc->completed)
1749  if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx,
1750  &to, &tc->completed) < 0)
1751  break;
1752  libusb_free_transfer(tc->transfer);
1753  free (tc);
1754  return ret;
1755  }
1756  }
1757 
1758  ret = tc->offset;
1763  if (tc->transfer)
1764  {
1765  if (tc->transfer->status != LIBUSB_TRANSFER_COMPLETED)
1766  ret = -1;
1767  libusb_free_transfer(tc->transfer);
1768  }
1769  free(tc);
1770  return ret;
1771 }
1772 
1782 void ftdi_transfer_data_cancel(struct ftdi_transfer_control *tc,
1783  struct timeval * to)
1784 {
1785  struct timeval tv = { 0, 0 };
1786 
1787  if (!tc->completed && tc->transfer != NULL)
1788  {
1789  if (to == NULL)
1790  to = &tv;
1791 
1792  libusb_cancel_transfer(tc->transfer);
1793  while (!tc->completed)
1794  {
1795  if (libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx, to, &tc->completed) < 0)
1796  break;
1797  }
1798  }
1799 
1800  if (tc->transfer)
1801  libusb_free_transfer(tc->transfer);
1802 
1803  free (tc);
1804 }
1805 
1816 int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
1817 {
1818  if (ftdi == NULL)
1819  ftdi_error_return(-1, "ftdi context invalid");
1820 
1821  ftdi->writebuffer_chunksize = chunksize;
1822  return 0;
1823 }
1824 
1834 int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
1835 {
1836  if (ftdi == NULL)
1837  ftdi_error_return(-1, "ftdi context invalid");
1838 
1839  *chunksize = ftdi->writebuffer_chunksize;
1840  return 0;
1841 }
1842 
1858 int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
1859 {
1860  int offset = 0, ret, i, num_of_chunks, chunk_remains;
1861  int packet_size = ftdi->max_packet_size;
1862  int actual_length = 1;
1863 
1864  if (ftdi == NULL || ftdi->usb_dev == NULL)
1865  ftdi_error_return(-666, "USB device unavailable");
1866 
1867  // Packet size sanity check (avoid division by zero)
1868  if (packet_size == 0)
1869  ftdi_error_return(-1, "max_packet_size is bogus (zero)");
1870 
1871  // everything we want is still in the readbuffer?
1872  if (size <= (int)ftdi->readbuffer_remaining)
1873  {
1874  memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
1875 
1876  // Fix offsets
1877  ftdi->readbuffer_remaining -= size;
1878  ftdi->readbuffer_offset += size;
1879 
1880  /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
1881 
1882  return size;
1883  }
1884  // something still in the readbuffer, but not enough to satisfy 'size'?
1885  if (ftdi->readbuffer_remaining != 0)
1886  {
1887  memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
1888 
1889  // Fix offset
1890  offset += ftdi->readbuffer_remaining;
1891  }
1892  // do the actual USB read
1893  while (offset < size && actual_length > 0)
1894  {
1895  ftdi->readbuffer_remaining = 0;
1896  ftdi->readbuffer_offset = 0;
1897  /* returns how much received */
1898  ret = libusb_bulk_transfer (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, &actual_length, ftdi->usb_read_timeout);
1899  if (ret < 0)
1900  ftdi_error_return(ret, "usb bulk read failed");
1901 
1902  if (actual_length > 2)
1903  {
1904  // skip FTDI status bytes.
1905  // Maybe stored in the future to enable modem use
1906  num_of_chunks = actual_length / packet_size;
1907  chunk_remains = actual_length % packet_size;
1908  //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
1909 
1910  ftdi->readbuffer_offset += 2;
1911  actual_length -= 2;
1912 
1913  if (actual_length > packet_size - 2)
1914  {
1915  for (i = 1; i < num_of_chunks; i++)
1916  memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1917  ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1918  packet_size - 2);
1919  if (chunk_remains > 2)
1920  {
1921  memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1922  ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1923  chunk_remains-2);
1924  actual_length -= 2*num_of_chunks;
1925  }
1926  else
1927  actual_length -= 2*(num_of_chunks-1)+chunk_remains;
1928  }
1929  }
1930  else if (actual_length <= 2)
1931  {
1932  // no more data to read?
1933  return offset;
1934  }
1935  if (actual_length > 0)
1936  {
1937  // data still fits in buf?
1938  if (offset+actual_length <= size)
1939  {
1940  memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, actual_length);
1941  //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
1942  offset += actual_length;
1943 
1944  /* Did we read exactly the right amount of bytes? */
1945  if (offset == size)
1946  //printf("read_data exact rem %d offset %d\n",
1947  //ftdi->readbuffer_remaining, offset);
1948  return offset;
1949  }
1950  else
1951  {
1952  // only copy part of the data or size <= readbuffer_chunksize
1953  int part_size = size-offset;
1954  memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size);
1955 
1956  ftdi->readbuffer_offset += part_size;
1957  ftdi->readbuffer_remaining = actual_length-part_size;
1958  offset += part_size;
1959 
1960  /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
1961  part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
1962 
1963  return offset;
1964  }
1965  }
1966  }
1967  // never reached
1968  return -127;
1969 }
1970 
1983 int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
1984 {
1985  unsigned char *new_buf;
1986 
1987  if (ftdi == NULL)
1988  ftdi_error_return(-1, "ftdi context invalid");
1989 
1990  // Invalidate all remaining data
1991  ftdi->readbuffer_offset = 0;
1992  ftdi->readbuffer_remaining = 0;
1993 #ifdef __linux__
1994  /* We can't set readbuffer_chunksize larger than MAX_BULK_BUFFER_LENGTH,
1995  which is defined in libusb-1.0. Otherwise, each USB read request will
1996  be divided into multiple URBs. This will cause issues on Linux kernel
1997  older than 2.6.32. */
1998  if (chunksize > 16384)
1999  chunksize = 16384;
2000 #endif
2001 
2002  if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL)
2003  ftdi_error_return(-1, "out of memory for readbuffer");
2004 
2005  ftdi->readbuffer = new_buf;
2006  ftdi->readbuffer_chunksize = chunksize;
2007 
2008  return 0;
2009 }
2010 
2020 int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
2021 {
2022  if (ftdi == NULL)
2023  ftdi_error_return(-1, "FTDI context invalid");
2024 
2025  *chunksize = ftdi->readbuffer_chunksize;
2026  return 0;
2027 }
2028 
2041 int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
2042 {
2043  unsigned short usb_val;
2044 
2045  if (ftdi == NULL || ftdi->usb_dev == NULL)
2046  ftdi_error_return(-2, "USB device unavailable");
2047 
2048  usb_val = bitmask; // low byte: bitmask
2049  usb_val |= (mode << 8);
2050  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2051  ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a BM/2232C type chip?");
2052 
2053  ftdi->bitbang_mode = mode;
2054  ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
2055  return 0;
2056 }
2057 
2067 int ftdi_disable_bitbang(struct ftdi_context *ftdi)
2068 {
2069  if (ftdi == NULL || ftdi->usb_dev == NULL)
2070  ftdi_error_return(-2, "USB device unavailable");
2071 
2072  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2073  ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?");
2074 
2075  ftdi->bitbang_enabled = 0;
2076  return 0;
2077 }
2078 
2079 
2090 int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
2091 {
2092  if (ftdi == NULL || ftdi->usb_dev == NULL)
2093  ftdi_error_return(-2, "USB device unavailable");
2094 
2095  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_PINS_REQUEST, 0, ftdi->index, (unsigned char *)pins, 1, ftdi->usb_read_timeout) != 1)
2096  ftdi_error_return(-1, "read pins failed");
2097 
2098  return 0;
2099 }
2100 
2116 int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
2117 {
2118  unsigned short usb_val;
2119 
2120  if (latency < 1)
2121  ftdi_error_return(-1, "latency out of range. Only valid for 1-255");
2122 
2123  if (ftdi == NULL || ftdi->usb_dev == NULL)
2124  ftdi_error_return(-3, "USB device unavailable");
2125 
2126  usb_val = latency;
2127  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_LATENCY_TIMER_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2128  ftdi_error_return(-2, "unable to set latency timer");
2129 
2130  return 0;
2131 }
2132 
2143 int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
2144 {
2145  unsigned short usb_val;
2146 
2147  if (ftdi == NULL || ftdi->usb_dev == NULL)
2148  ftdi_error_return(-2, "USB device unavailable");
2149 
2150  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_GET_LATENCY_TIMER_REQUEST, 0, ftdi->index, (unsigned char *)&usb_val, 1, ftdi->usb_read_timeout) != 1)
2151  ftdi_error_return(-1, "reading latency timer failed");
2152 
2153  *latency = (unsigned char)usb_val;
2154  return 0;
2155 }
2156 
2197 int ftdi_poll_modem_status(struct ftdi_context *ftdi, unsigned short *status)
2198 {
2199  char usb_val[2];
2200 
2201  if (ftdi == NULL || ftdi->usb_dev == NULL)
2202  ftdi_error_return(-2, "USB device unavailable");
2203 
2204  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_POLL_MODEM_STATUS_REQUEST, 0, ftdi->index, (unsigned char *)usb_val, 2, ftdi->usb_read_timeout) != 2)
2205  ftdi_error_return(-1, "getting modem status failed");
2206 
2207  *status = (usb_val[1] << 8) | (usb_val[0] & 0xFF);
2208 
2209  return 0;
2210 }
2211 
2223 int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
2224 {
2225  if (ftdi == NULL || ftdi->usb_dev == NULL)
2226  ftdi_error_return(-2, "USB device unavailable");
2227 
2228  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2229  SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
2230  NULL, 0, ftdi->usb_write_timeout) < 0)
2231  ftdi_error_return(-1, "set flow control failed");
2232 
2233  return 0;
2234 }
2235 
2246 int ftdi_setdtr(struct ftdi_context *ftdi, int state)
2247 {
2248  unsigned short usb_val;
2249 
2250  if (ftdi == NULL || ftdi->usb_dev == NULL)
2251  ftdi_error_return(-2, "USB device unavailable");
2252 
2253  if (state)
2254  usb_val = SIO_SET_DTR_HIGH;
2255  else
2256  usb_val = SIO_SET_DTR_LOW;
2257 
2258  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2259  SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2260  NULL, 0, ftdi->usb_write_timeout) < 0)
2261  ftdi_error_return(-1, "set dtr failed");
2262 
2263  return 0;
2264 }
2265 
2276 int ftdi_setrts(struct ftdi_context *ftdi, int state)
2277 {
2278  unsigned short usb_val;
2279 
2280  if (ftdi == NULL || ftdi->usb_dev == NULL)
2281  ftdi_error_return(-2, "USB device unavailable");
2282 
2283  if (state)
2284  usb_val = SIO_SET_RTS_HIGH;
2285  else
2286  usb_val = SIO_SET_RTS_LOW;
2287 
2288  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2289  SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2290  NULL, 0, ftdi->usb_write_timeout) < 0)
2291  ftdi_error_return(-1, "set of rts failed");
2292 
2293  return 0;
2294 }
2295 
2307 int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts)
2308 {
2309  unsigned short usb_val;
2310 
2311  if (ftdi == NULL || ftdi->usb_dev == NULL)
2312  ftdi_error_return(-2, "USB device unavailable");
2313 
2314  if (dtr)
2315  usb_val = SIO_SET_DTR_HIGH;
2316  else
2317  usb_val = SIO_SET_DTR_LOW;
2318 
2319  if (rts)
2320  usb_val |= SIO_SET_RTS_HIGH;
2321  else
2322  usb_val |= SIO_SET_RTS_LOW;
2323 
2324  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2325  SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2326  NULL, 0, ftdi->usb_write_timeout) < 0)
2327  ftdi_error_return(-1, "set of rts/dtr failed");
2328 
2329  return 0;
2330 }
2331 
2343 int ftdi_set_event_char(struct ftdi_context *ftdi,
2344  unsigned char eventch, unsigned char enable)
2345 {
2346  unsigned short usb_val;
2347 
2348  if (ftdi == NULL || ftdi->usb_dev == NULL)
2349  ftdi_error_return(-2, "USB device unavailable");
2350 
2351  usb_val = eventch;
2352  if (enable)
2353  usb_val |= 1 << 8;
2354 
2355  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_EVENT_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2356  ftdi_error_return(-1, "setting event character failed");
2357 
2358  return 0;
2359 }
2360 
2372 int ftdi_set_error_char(struct ftdi_context *ftdi,
2373  unsigned char errorch, unsigned char enable)
2374 {
2375  unsigned short usb_val;
2376 
2377  if (ftdi == NULL || ftdi->usb_dev == NULL)
2378  ftdi_error_return(-2, "USB device unavailable");
2379 
2380  usb_val = errorch;
2381  if (enable)
2382  usb_val |= 1 << 8;
2383 
2384  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_ERROR_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2385  ftdi_error_return(-1, "setting error character failed");
2386 
2387  return 0;
2388 }
2389 
2402 int ftdi_eeprom_initdefaults(struct ftdi_context *ftdi, char * manufacturer,
2403  char * product, char * serial)
2404 {
2405  struct ftdi_eeprom *eeprom;
2406 
2407  if (ftdi == NULL)
2408  ftdi_error_return(-1, "No struct ftdi_context");
2409 
2410  if (ftdi->eeprom == NULL)
2411  ftdi_error_return(-2,"No struct ftdi_eeprom");
2412 
2413  eeprom = ftdi->eeprom;
2414  memset(eeprom, 0, sizeof(struct ftdi_eeprom));
2415 
2416  if (ftdi->usb_dev == NULL)
2417  ftdi_error_return(-3, "No connected device or device not yet opened");
2418 
2419  eeprom->vendor_id = 0x0403;
2420  eeprom->use_serial = 1;
2421  if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM) ||
2422  (ftdi->type == TYPE_R))
2423  eeprom->product_id = 0x6001;
2424  else if (ftdi->type == TYPE_4232H)
2425  eeprom->product_id = 0x6011;
2426  else if (ftdi->type == TYPE_232H)
2427  eeprom->product_id = 0x6014;
2428  else if (ftdi->type == TYPE_230X)
2429  eeprom->product_id = 0x6015;
2430  else
2431  eeprom->product_id = 0x6010;
2432 
2433  if (ftdi->type == TYPE_AM)
2434  eeprom->usb_version = 0x0101;
2435  else
2436  eeprom->usb_version = 0x0200;
2437  eeprom->max_power = 100;
2438 
2439  if (eeprom->manufacturer)
2440  free (eeprom->manufacturer);
2441  eeprom->manufacturer = NULL;
2442  if (manufacturer)
2443  {
2444  eeprom->manufacturer = malloc(strlen(manufacturer)+1);
2445  if (eeprom->manufacturer)
2446  strcpy(eeprom->manufacturer, manufacturer);
2447  }
2448 
2449  if (eeprom->product)
2450  free (eeprom->product);
2451  eeprom->product = NULL;
2452  if(product)
2453  {
2454  eeprom->product = malloc(strlen(product)+1);
2455  if (eeprom->product)
2456  strcpy(eeprom->product, product);
2457  }
2458  else
2459  {
2460  const char* default_product;
2461  switch(ftdi->type)
2462  {
2463  case TYPE_AM: default_product = "AM"; break;
2464  case TYPE_BM: default_product = "BM"; break;
2465  case TYPE_2232C: default_product = "Dual RS232"; break;
2466  case TYPE_R: default_product = "FT232R USB UART"; break;
2467  case TYPE_2232H: default_product = "Dual RS232-HS"; break;
2468  case TYPE_4232H: default_product = "FT4232H"; break;
2469  case TYPE_232H: default_product = "Single-RS232-HS"; break;
2470  case TYPE_230X: default_product = "FT230X Basic UART"; break;
2471  default:
2472  ftdi_error_return(-3, "Unknown chip type");
2473  }
2474  eeprom->product = malloc(strlen(default_product) +1);
2475  if (eeprom->product)
2476  strcpy(eeprom->product, default_product);
2477  }
2478 
2479  if (eeprom->serial)
2480  free (eeprom->serial);
2481  eeprom->serial = NULL;
2482  if (serial)
2483  {
2484  eeprom->serial = malloc(strlen(serial)+1);
2485  if (eeprom->serial)
2486  strcpy(eeprom->serial, serial);
2487  }
2488 
2489  if (ftdi->type == TYPE_R)
2490  {
2491  eeprom->max_power = 90;
2492  eeprom->size = 0x80;
2493  eeprom->cbus_function[0] = CBUS_TXLED;
2494  eeprom->cbus_function[1] = CBUS_RXLED;
2495  eeprom->cbus_function[2] = CBUS_TXDEN;
2496  eeprom->cbus_function[3] = CBUS_PWREN;
2497  eeprom->cbus_function[4] = CBUS_SLEEP;
2498  }
2499  else if (ftdi->type == TYPE_230X)
2500  {
2501  eeprom->max_power = 90;
2502  eeprom->size = 0x100;
2503  eeprom->cbus_function[0] = CBUSX_TXDEN;
2504  eeprom->cbus_function[1] = CBUSX_RXLED;
2505  eeprom->cbus_function[2] = CBUSX_TXLED;
2506  eeprom->cbus_function[3] = CBUSX_SLEEP;
2507  }
2508  else
2509  {
2510  if(ftdi->type == TYPE_232H)
2511  {
2512  int i;
2513  for (i=0; i<10; i++)
2514  eeprom->cbus_function[i] = CBUSH_TRISTATE;
2515  }
2516  eeprom->size = -1;
2517  }
2518  switch (ftdi->type)
2519  {
2520  case TYPE_AM:
2521  eeprom->release_number = 0x0200;
2522  break;
2523  case TYPE_BM:
2524  eeprom->release_number = 0x0400;
2525  break;
2526  case TYPE_2232C:
2527  eeprom->release_number = 0x0500;
2528  break;
2529  case TYPE_R:
2530  eeprom->release_number = 0x0600;
2531  break;
2532  case TYPE_2232H:
2533  eeprom->release_number = 0x0700;
2534  break;
2535  case TYPE_4232H:
2536  eeprom->release_number = 0x0800;
2537  break;
2538  case TYPE_232H:
2539  eeprom->release_number = 0x0900;
2540  break;
2541  case TYPE_230X:
2542  eeprom->release_number = 0x1000;
2543  break;
2544  default:
2545  eeprom->release_number = 0x00;
2546  }
2547  return 0;
2548 }
2549 
2550 int ftdi_eeprom_set_strings(struct ftdi_context *ftdi, char * manufacturer,
2551  char * product, char * serial)
2552 {
2553  struct ftdi_eeprom *eeprom;
2554 
2555  if (ftdi == NULL)
2556  ftdi_error_return(-1, "No struct ftdi_context");
2557 
2558  if (ftdi->eeprom == NULL)
2559  ftdi_error_return(-2,"No struct ftdi_eeprom");
2560 
2561  eeprom = ftdi->eeprom;
2562 
2563  if (ftdi->usb_dev == NULL)
2564  ftdi_error_return(-3, "No connected device or device not yet opened");
2565 
2566  if (manufacturer)
2567  {
2568  if (eeprom->manufacturer)
2569  free (eeprom->manufacturer);
2570  eeprom->manufacturer = malloc(strlen(manufacturer)+1);
2571  if (eeprom->manufacturer)
2572  strcpy(eeprom->manufacturer, manufacturer);
2573  }
2574 
2575  if(product)
2576  {
2577  if (eeprom->product)
2578  free (eeprom->product);
2579  eeprom->product = malloc(strlen(product)+1);
2580  if (eeprom->product)
2581  strcpy(eeprom->product, product);
2582  }
2583 
2584  if (serial)
2585  {
2586  if (eeprom->serial)
2587  free (eeprom->serial);
2588  eeprom->serial = malloc(strlen(serial)+1);
2589  if (eeprom->serial)
2590  {
2591  strcpy(eeprom->serial, serial);
2592  eeprom->use_serial = 1;
2593  }
2594  }
2595  return 0;
2596 }
2597 
2598 
2599 /*FTD2XX doesn't check for values not fitting in the ACBUS Signal options*/
2600 void set_ft232h_cbus(struct ftdi_eeprom *eeprom, unsigned char * output)
2601 {
2602  int i;
2603  for(i=0; i<5; i++)
2604  {
2605  int mode_low, mode_high;
2606  if (eeprom->cbus_function[2*i]> CBUSH_CLK7_5)
2607  mode_low = CBUSH_TRISTATE;
2608  else
2609  mode_low = eeprom->cbus_function[2*i];
2610  if (eeprom->cbus_function[2*i+1]> CBUSH_CLK7_5)
2611  mode_high = CBUSH_TRISTATE;
2612  else
2613  mode_high = eeprom->cbus_function[2*i+1];
2614 
2615  output[0x18+i] = (mode_high <<4) | mode_low;
2616  }
2617 }
2618 /* Return the bits for the encoded EEPROM Structure of a requested Mode
2619  *
2620  */
2621 static unsigned char type2bit(unsigned char type, enum ftdi_chip_type chip)
2622 {
2623  switch (chip)
2624  {
2625  case TYPE_2232H:
2626  case TYPE_2232C:
2627  {
2628  switch (type)
2629  {
2630  case CHANNEL_IS_UART: return 0;
2631  case CHANNEL_IS_FIFO: return 0x01;
2632  case CHANNEL_IS_OPTO: return 0x02;
2633  case CHANNEL_IS_CPU : return 0x04;
2634  default: return 0;
2635  }
2636  }
2637  case TYPE_232H:
2638  {
2639  switch (type)
2640  {
2641  case CHANNEL_IS_UART : return 0;
2642  case CHANNEL_IS_FIFO : return 0x01;
2643  case CHANNEL_IS_OPTO : return 0x02;
2644  case CHANNEL_IS_CPU : return 0x04;
2645  case CHANNEL_IS_FT1284 : return 0x08;
2646  default: return 0;
2647  }
2648  }
2649  case TYPE_230X: /* FT230X is only UART */
2650  default: return 0;
2651  }
2652  return 0;
2653 }
2654 
2669 int ftdi_eeprom_build(struct ftdi_context *ftdi)
2670 {
2671  unsigned char i, j, eeprom_size_mask;
2672  unsigned short checksum, value;
2673  unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
2674  int user_area_size, free_start, free_end;
2675  struct ftdi_eeprom *eeprom;
2676  unsigned char * output;
2677 
2678  if (ftdi == NULL)
2679  ftdi_error_return(-2,"No context");
2680  if (ftdi->eeprom == NULL)
2681  ftdi_error_return(-2,"No eeprom structure");
2682 
2683  eeprom= ftdi->eeprom;
2684  output = eeprom->buf;
2685 
2686  if (eeprom->chip == -1)
2687  ftdi_error_return(-6,"No connected EEPROM or EEPROM type unknown");
2688 
2689  if (eeprom->size == -1)
2690  {
2691  if ((eeprom->chip == 0x56) || (eeprom->chip == 0x66))
2692  eeprom->size = 0x100;
2693  else
2694  eeprom->size = 0x80;
2695  }
2696 
2697  if (eeprom->manufacturer != NULL)
2698  manufacturer_size = strlen(eeprom->manufacturer);
2699  if (eeprom->product != NULL)
2700  product_size = strlen(eeprom->product);
2701  if (eeprom->serial != NULL)
2702  serial_size = strlen(eeprom->serial);
2703 
2704  // eeprom size check
2705  switch (ftdi->type)
2706  {
2707  case TYPE_AM:
2708  case TYPE_BM:
2709  case TYPE_R:
2710  user_area_size = 96; // base size for strings (total of 48 characters)
2711  break;
2712  case TYPE_2232C:
2713  user_area_size = 90; // two extra config bytes and 4 bytes PnP stuff
2714  break;
2715  case TYPE_230X:
2716  user_area_size = 88; // four extra config bytes + 4 bytes PnP stuff
2717  break;
2718  case TYPE_2232H: // six extra config bytes + 4 bytes PnP stuff
2719  case TYPE_4232H:
2720  user_area_size = 86;
2721  break;
2722  case TYPE_232H:
2723  user_area_size = 80;
2724  break;
2725  default:
2726  user_area_size = 0;
2727  break;
2728  }
2729  user_area_size -= (manufacturer_size + product_size + serial_size) * 2;
2730 
2731  if (user_area_size < 0)
2732  ftdi_error_return(-1,"eeprom size exceeded");
2733 
2734  // empty eeprom
2735  if (ftdi->type == TYPE_230X)
2736  {
2737  /* FT230X have a reserved section in the middle of the MTP,
2738  which cannot be written to, but must be included in the checksum */
2739  memset(ftdi->eeprom->buf, 0, 0x80);
2740  memset((ftdi->eeprom->buf + 0xa0), 0, (FTDI_MAX_EEPROM_SIZE - 0xa0));
2741  }
2742  else
2743  {
2744  memset(ftdi->eeprom->buf, 0, FTDI_MAX_EEPROM_SIZE);
2745  }
2746 
2747  // Bytes and Bits set for all Types
2748 
2749  // Addr 02: Vendor ID
2750  output[0x02] = eeprom->vendor_id;
2751  output[0x03] = eeprom->vendor_id >> 8;
2752 
2753  // Addr 04: Product ID
2754  output[0x04] = eeprom->product_id;
2755  output[0x05] = eeprom->product_id >> 8;
2756 
2757  // Addr 06: Device release number (0400h for BM features)
2758  output[0x06] = eeprom->release_number;
2759  output[0x07] = eeprom->release_number >> 8;
2760 
2761  // Addr 08: Config descriptor
2762  // Bit 7: always 1
2763  // Bit 6: 1 if this device is self powered, 0 if bus powered
2764  // Bit 5: 1 if this device uses remote wakeup
2765  // Bit 4-0: reserved - 0
2766  j = 0x80;
2767  if (eeprom->self_powered)
2768  j |= 0x40;
2769  if (eeprom->remote_wakeup)
2770  j |= 0x20;
2771  output[0x08] = j;
2772 
2773  // Addr 09: Max power consumption: max power = value * 2 mA
2774  output[0x09] = eeprom->max_power / MAX_POWER_MILLIAMP_PER_UNIT;
2775 
2776  if ((ftdi->type != TYPE_AM) && (ftdi->type != TYPE_230X))
2777  {
2778  // Addr 0A: Chip configuration
2779  // Bit 7: 0 - reserved
2780  // Bit 6: 0 - reserved
2781  // Bit 5: 0 - reserved
2782  // Bit 4: 1 - Change USB version
2783  // Bit 3: 1 - Use the serial number string
2784  // Bit 2: 1 - Enable suspend pull downs for lower power
2785  // Bit 1: 1 - Out EndPoint is Isochronous
2786  // Bit 0: 1 - In EndPoint is Isochronous
2787  //
2788  j = 0;
2789  if (eeprom->in_is_isochronous)
2790  j = j | 1;
2791  if (eeprom->out_is_isochronous)
2792  j = j | 2;
2793  output[0x0A] = j;
2794  }
2795 
2796  // Dynamic content
2797  // Strings start at 0x94 (TYPE_AM, TYPE_BM)
2798  // 0x96 (TYPE_2232C), 0x98 (TYPE_R) and 0x9a (TYPE_x232H)
2799  // 0xa0 (TYPE_232H)
2800  i = 0;
2801  switch (ftdi->type)
2802  {
2803  case TYPE_2232H:
2804  case TYPE_4232H:
2805  i += 2;
2806  case TYPE_R:
2807  i += 2;
2808  case TYPE_2232C:
2809  i += 2;
2810  case TYPE_AM:
2811  case TYPE_BM:
2812  i += 0x94;
2813  break;
2814  case TYPE_232H:
2815  case TYPE_230X:
2816  i = 0xa0;
2817  break;
2818  }
2819  /* Wrap around 0x80 for 128 byte EEPROMS (Internale and 93x46) */
2820  eeprom_size_mask = eeprom->size -1;
2821  free_end = i & eeprom_size_mask;
2822 
2823  // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
2824  // Addr 0F: Length of manufacturer string
2825  // Output manufacturer
2826  output[0x0E] = i; // calculate offset
2827  output[i & eeprom_size_mask] = manufacturer_size*2 + 2, i++;
2828  output[i & eeprom_size_mask] = 0x03, i++; // type: string
2829  for (j = 0; j < manufacturer_size; j++)
2830  {
2831  output[i & eeprom_size_mask] = eeprom->manufacturer[j], i++;
2832  output[i & eeprom_size_mask] = 0x00, i++;
2833  }
2834  output[0x0F] = manufacturer_size*2 + 2;
2835 
2836  // Addr 10: Offset of the product string + 0x80, calculated later
2837  // Addr 11: Length of product string
2838  output[0x10] = i | 0x80; // calculate offset
2839  output[i & eeprom_size_mask] = product_size*2 + 2, i++;
2840  output[i & eeprom_size_mask] = 0x03, i++;
2841  for (j = 0; j < product_size; j++)
2842  {
2843  output[i & eeprom_size_mask] = eeprom->product[j], i++;
2844  output[i & eeprom_size_mask] = 0x00, i++;
2845  }
2846  output[0x11] = product_size*2 + 2;
2847 
2848  // Addr 12: Offset of the serial string + 0x80, calculated later
2849  // Addr 13: Length of serial string
2850  output[0x12] = i | 0x80; // calculate offset
2851  output[i & eeprom_size_mask] = serial_size*2 + 2, i++;
2852  output[i & eeprom_size_mask] = 0x03, i++;
2853  for (j = 0; j < serial_size; j++)
2854  {
2855  output[i & eeprom_size_mask] = eeprom->serial[j], i++;
2856  output[i & eeprom_size_mask] = 0x00, i++;
2857  }
2858 
2859  // Legacy port name and PnP fields for FT2232 and newer chips
2860  if (ftdi->type > TYPE_BM)
2861  {
2862  output[i & eeprom_size_mask] = 0x02; /* as seen when written with FTD2XX */
2863  i++;
2864  output[i & eeprom_size_mask] = 0x03; /* as seen when written with FTD2XX */
2865  i++;
2866  output[i & eeprom_size_mask] = eeprom->is_not_pnp; /* as seen when written with FTD2XX */
2867  i++;
2868  }
2869 
2870  output[0x13] = serial_size*2 + 2;
2871 
2872  if (ftdi->type > TYPE_AM) /* use_serial not used in AM devices */
2873  {
2874  if (eeprom->use_serial)
2875  output[0x0A] |= USE_SERIAL_NUM;
2876  else
2877  output[0x0A] &= ~USE_SERIAL_NUM;
2878  }
2879 
2880  /* Bytes and Bits specific to (some) types
2881  Write linear, as this allows easier fixing*/
2882  switch (ftdi->type)
2883  {
2884  case TYPE_AM:
2885  break;
2886  case TYPE_BM:
2887  output[0x0C] = eeprom->usb_version & 0xff;
2888  output[0x0D] = (eeprom->usb_version>>8) & 0xff;
2889  if (eeprom->use_usb_version)
2890  output[0x0A] |= USE_USB_VERSION_BIT;
2891  else
2892  output[0x0A] &= ~USE_USB_VERSION_BIT;
2893 
2894  break;
2895  case TYPE_2232C:
2896 
2897  output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232C);
2898  if ( eeprom->channel_a_driver == DRIVER_VCP)
2899  output[0x00] |= DRIVER_VCP;
2900  else
2901  output[0x00] &= ~DRIVER_VCP;
2902 
2903  if ( eeprom->high_current_a == HIGH_CURRENT_DRIVE)
2904  output[0x00] |= HIGH_CURRENT_DRIVE;
2905  else
2906  output[0x00] &= ~HIGH_CURRENT_DRIVE;
2907 
2908  output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232C);
2909  if ( eeprom->channel_b_driver == DRIVER_VCP)
2910  output[0x01] |= DRIVER_VCP;
2911  else
2912  output[0x01] &= ~DRIVER_VCP;
2913 
2914  if ( eeprom->high_current_b == HIGH_CURRENT_DRIVE)
2915  output[0x01] |= HIGH_CURRENT_DRIVE;
2916  else
2917  output[0x01] &= ~HIGH_CURRENT_DRIVE;
2918 
2919  if (eeprom->in_is_isochronous)
2920  output[0x0A] |= 0x1;
2921  else
2922  output[0x0A] &= ~0x1;
2923  if (eeprom->out_is_isochronous)
2924  output[0x0A] |= 0x2;
2925  else
2926  output[0x0A] &= ~0x2;
2927  if (eeprom->suspend_pull_downs)
2928  output[0x0A] |= 0x4;
2929  else
2930  output[0x0A] &= ~0x4;
2931  if (eeprom->use_usb_version)
2932  output[0x0A] |= USE_USB_VERSION_BIT;
2933  else
2934  output[0x0A] &= ~USE_USB_VERSION_BIT;
2935 
2936  output[0x0C] = eeprom->usb_version & 0xff;
2937  output[0x0D] = (eeprom->usb_version>>8) & 0xff;
2938  output[0x14] = eeprom->chip;
2939  break;
2940  case TYPE_R:
2941  if (eeprom->high_current == HIGH_CURRENT_DRIVE_R)
2942  output[0x00] |= HIGH_CURRENT_DRIVE_R;
2943  if (eeprom->external_oscillator)
2944  output[0x00] |= 0x02;
2945  output[0x01] = 0x40; /* Hard coded Endpoint Size*/
2946 
2947  if (eeprom->suspend_pull_downs)
2948  output[0x0A] |= 0x4;
2949  else
2950  output[0x0A] &= ~0x4;
2951  output[0x0B] = eeprom->invert;
2952  output[0x0C] = eeprom->usb_version & 0xff;
2953  output[0x0D] = (eeprom->usb_version>>8) & 0xff;
2954 
2955  if (eeprom->cbus_function[0] > CBUS_BB_RD)
2956  output[0x14] = CBUS_TXLED;
2957  else
2958  output[0x14] = eeprom->cbus_function[0];
2959 
2960  if (eeprom->cbus_function[1] > CBUS_BB_RD)
2961  output[0x14] |= CBUS_RXLED<<4;
2962  else
2963  output[0x14] |= eeprom->cbus_function[1]<<4;
2964 
2965  if (eeprom->cbus_function[2] > CBUS_BB_RD)
2966  output[0x15] = CBUS_TXDEN;
2967  else
2968  output[0x15] = eeprom->cbus_function[2];
2969 
2970  if (eeprom->cbus_function[3] > CBUS_BB_RD)
2971  output[0x15] |= CBUS_PWREN<<4;
2972  else
2973  output[0x15] |= eeprom->cbus_function[3]<<4;
2974 
2975  if (eeprom->cbus_function[4] > CBUS_CLK6)
2976  output[0x16] = CBUS_SLEEP;
2977  else
2978  output[0x16] = eeprom->cbus_function[4];
2979  break;
2980  case TYPE_2232H:
2981  output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232H);
2982  if ( eeprom->channel_a_driver == DRIVER_VCP)
2983  output[0x00] |= DRIVER_VCP;
2984  else
2985  output[0x00] &= ~DRIVER_VCP;
2986 
2987  output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232H);
2988  if ( eeprom->channel_b_driver == DRIVER_VCP)
2989  output[0x01] |= DRIVER_VCP;
2990  else
2991  output[0x01] &= ~DRIVER_VCP;
2992  if (eeprom->suspend_dbus7 == SUSPEND_DBUS7_BIT)
2993  output[0x01] |= SUSPEND_DBUS7_BIT;
2994  else
2995  output[0x01] &= ~SUSPEND_DBUS7_BIT;
2996 
2997  if (eeprom->suspend_pull_downs)
2998  output[0x0A] |= 0x4;
2999  else
3000  output[0x0A] &= ~0x4;
3001 
3002  if (eeprom->group0_drive > DRIVE_16MA)
3003  output[0x0c] |= DRIVE_16MA;
3004  else
3005  output[0x0c] |= eeprom->group0_drive;
3006  if (eeprom->group0_schmitt == IS_SCHMITT)
3007  output[0x0c] |= IS_SCHMITT;
3008  if (eeprom->group0_slew == SLOW_SLEW)
3009  output[0x0c] |= SLOW_SLEW;
3010 
3011  if (eeprom->group1_drive > DRIVE_16MA)
3012  output[0x0c] |= DRIVE_16MA<<4;
3013  else
3014  output[0x0c] |= eeprom->group1_drive<<4;
3015  if (eeprom->group1_schmitt == IS_SCHMITT)
3016  output[0x0c] |= IS_SCHMITT<<4;
3017  if (eeprom->group1_slew == SLOW_SLEW)
3018  output[0x0c] |= SLOW_SLEW<<4;
3019 
3020  if (eeprom->group2_drive > DRIVE_16MA)
3021  output[0x0d] |= DRIVE_16MA;
3022  else
3023  output[0x0d] |= eeprom->group2_drive;
3024  if (eeprom->group2_schmitt == IS_SCHMITT)
3025  output[0x0d] |= IS_SCHMITT;
3026  if (eeprom->group2_slew == SLOW_SLEW)
3027  output[0x0d] |= SLOW_SLEW;
3028 
3029  if (eeprom->group3_drive > DRIVE_16MA)
3030  output[0x0d] |= DRIVE_16MA<<4;
3031  else
3032  output[0x0d] |= eeprom->group3_drive<<4;
3033  if (eeprom->group3_schmitt == IS_SCHMITT)
3034  output[0x0d] |= IS_SCHMITT<<4;
3035  if (eeprom->group3_slew == SLOW_SLEW)
3036  output[0x0d] |= SLOW_SLEW<<4;
3037 
3038  output[0x18] = eeprom->chip;
3039 
3040  break;
3041  case TYPE_4232H:
3042  if (eeprom->channel_a_driver == DRIVER_VCP)
3043  output[0x00] |= DRIVER_VCP;
3044  else
3045  output[0x00] &= ~DRIVER_VCP;
3046  if (eeprom->channel_b_driver == DRIVER_VCP)
3047  output[0x01] |= DRIVER_VCP;
3048  else
3049  output[0x01] &= ~DRIVER_VCP;
3050  if (eeprom->channel_c_driver == DRIVER_VCP)
3051  output[0x00] |= (DRIVER_VCP << 4);
3052  else
3053  output[0x00] &= ~(DRIVER_VCP << 4);
3054  if (eeprom->channel_d_driver == DRIVER_VCP)
3055  output[0x01] |= (DRIVER_VCP << 4);
3056  else
3057  output[0x01] &= ~(DRIVER_VCP << 4);
3058 
3059  if (eeprom->suspend_pull_downs)
3060  output[0x0a] |= 0x4;
3061  else
3062  output[0x0a] &= ~0x4;
3063 
3064  if (eeprom->channel_a_rs485enable)
3065  output[0x0b] |= CHANNEL_IS_RS485 << 0;
3066  else
3067  output[0x0b] &= ~(CHANNEL_IS_RS485 << 0);
3068  if (eeprom->channel_b_rs485enable)
3069  output[0x0b] |= CHANNEL_IS_RS485 << 1;
3070  else
3071  output[0x0b] &= ~(CHANNEL_IS_RS485 << 1);
3072  if (eeprom->channel_c_rs485enable)
3073  output[0x0b] |= CHANNEL_IS_RS485 << 2;
3074  else
3075  output[0x0b] &= ~(CHANNEL_IS_RS485 << 2);
3076  if (eeprom->channel_d_rs485enable)
3077  output[0x0b] |= CHANNEL_IS_RS485 << 3;
3078  else
3079  output[0x0b] &= ~(CHANNEL_IS_RS485 << 3);
3080 
3081  if (eeprom->group0_drive > DRIVE_16MA)
3082  output[0x0c] |= DRIVE_16MA;
3083  else
3084  output[0x0c] |= eeprom->group0_drive;
3085  if (eeprom->group0_schmitt == IS_SCHMITT)
3086  output[0x0c] |= IS_SCHMITT;
3087  if (eeprom->group0_slew == SLOW_SLEW)
3088  output[0x0c] |= SLOW_SLEW;
3089 
3090  if (eeprom->group1_drive > DRIVE_16MA)
3091  output[0x0c] |= DRIVE_16MA<<4;
3092  else
3093  output[0x0c] |= eeprom->group1_drive<<4;
3094  if (eeprom->group1_schmitt == IS_SCHMITT)
3095  output[0x0c] |= IS_SCHMITT<<4;
3096  if (eeprom->group1_slew == SLOW_SLEW)
3097  output[0x0c] |= SLOW_SLEW<<4;
3098 
3099  if (eeprom->group2_drive > DRIVE_16MA)
3100  output[0x0d] |= DRIVE_16MA;
3101  else
3102  output[0x0d] |= eeprom->group2_drive;
3103  if (eeprom->group2_schmitt == IS_SCHMITT)
3104  output[0x0d] |= IS_SCHMITT;
3105  if (eeprom->group2_slew == SLOW_SLEW)
3106  output[0x0d] |= SLOW_SLEW;
3107 
3108  if (eeprom->group3_drive > DRIVE_16MA)
3109  output[0x0d] |= DRIVE_16MA<<4;
3110  else
3111  output[0x0d] |= eeprom->group3_drive<<4;
3112  if (eeprom->group3_schmitt == IS_SCHMITT)
3113  output[0x0d] |= IS_SCHMITT<<4;
3114  if (eeprom->group3_slew == SLOW_SLEW)
3115  output[0x0d] |= SLOW_SLEW<<4;
3116 
3117  output[0x18] = eeprom->chip;
3118 
3119  break;
3120  case TYPE_232H:
3121  output[0x00] = type2bit(eeprom->channel_a_type, TYPE_232H);
3122  if ( eeprom->channel_a_driver == DRIVER_VCP)
3123  output[0x00] |= DRIVER_VCPH;
3124  else
3125  output[0x00] &= ~DRIVER_VCPH;
3126  if (eeprom->powersave)
3127  output[0x01] |= POWER_SAVE_DISABLE_H;
3128  else
3129  output[0x01] &= ~POWER_SAVE_DISABLE_H;
3130 
3131  if (eeprom->suspend_pull_downs)
3132  output[0x0a] |= 0x4;
3133  else
3134  output[0x0a] &= ~0x4;
3135 
3136  if (eeprom->clock_polarity)
3137  output[0x01] |= FT1284_CLK_IDLE_STATE;
3138  else
3139  output[0x01] &= ~FT1284_CLK_IDLE_STATE;
3140  if (eeprom->data_order)
3141  output[0x01] |= FT1284_DATA_LSB;
3142  else
3143  output[0x01] &= ~FT1284_DATA_LSB;
3144  if (eeprom->flow_control)
3145  output[0x01] |= FT1284_FLOW_CONTROL;
3146  else
3147  output[0x01] &= ~FT1284_FLOW_CONTROL;
3148  if (eeprom->group0_drive > DRIVE_16MA)
3149  output[0x0c] |= DRIVE_16MA;
3150  else
3151  output[0x0c] |= eeprom->group0_drive;
3152  if (eeprom->group0_schmitt == IS_SCHMITT)
3153  output[0x0c] |= IS_SCHMITT;
3154  if (eeprom->group0_slew == SLOW_SLEW)
3155  output[0x0c] |= SLOW_SLEW;
3156 
3157  if (eeprom->group1_drive > DRIVE_16MA)
3158  output[0x0d] |= DRIVE_16MA;
3159  else
3160  output[0x0d] |= eeprom->group1_drive;
3161  if (eeprom->group1_schmitt == IS_SCHMITT)
3162  output[0x0d] |= IS_SCHMITT;
3163  if (eeprom->group1_slew == SLOW_SLEW)
3164  output[0x0d] |= SLOW_SLEW;
3165 
3166  set_ft232h_cbus(eeprom, output);
3167 
3168  output[0x1e] = eeprom->chip;
3169  fprintf(stderr,"FIXME: Build FT232H specific EEPROM settings\n");
3170  break;
3171  case TYPE_230X:
3172  output[0x00] = 0x80; /* Actually, leave the default value */
3173  output[0x0a] = 0x08; /* Enable USB Serial Number */
3174  /*FIXME: Make DBUS & CBUS Control configurable*/
3175  output[0x0c] = 0; /* DBUS drive 4mA, CBUS drive 4 mA like factory default */
3176  for (j = 0; j <= 6; j++)
3177  {
3178  output[0x1a + j] = eeprom->cbus_function[j];
3179  }
3180  output[0x0b] = eeprom->invert;
3181  break;
3182  }
3183 
3184  /* First address without use */
3185  free_start = 0;
3186  switch (ftdi->type)
3187  {
3188  case TYPE_230X:
3189  free_start += 2;
3190  case TYPE_232H:
3191  free_start += 6;
3192  case TYPE_2232H:
3193  case TYPE_4232H:
3194  free_start += 2;
3195  case TYPE_R:
3196  free_start += 2;
3197  case TYPE_2232C:
3198  free_start++;
3199  case TYPE_AM:
3200  case TYPE_BM:
3201  free_start += 0x14;
3202  }
3203 
3204  /* Arbitrary user data */
3205  if (eeprom->user_data && eeprom->user_data_size >= 0)
3206  {
3207  if (eeprom->user_data_addr < free_start)
3208  fprintf(stderr,"Warning, user data starts inside the generated data!\n");
3209  if (eeprom->user_data_addr + eeprom->user_data_size >= free_end)
3210  fprintf(stderr,"Warning, user data overlaps the strings area!\n");
3211  if (eeprom->user_data_addr + eeprom->user_data_size > eeprom->size)
3212  ftdi_error_return(-1,"eeprom size exceeded");
3213  memcpy(output + eeprom->user_data_addr, eeprom->user_data, eeprom->user_data_size);
3214  }
3215 
3216  // calculate checksum
3217  checksum = 0xAAAA;
3218 
3219  for (i = 0; i < eeprom->size/2-1; i++)
3220  {
3221  if ((ftdi->type == TYPE_230X) && (i == 0x12))
3222  {
3223  /* FT230X has a user section in the MTP which is not part of the checksum */
3224  i = 0x40;
3225  }
3226  if ((ftdi->type == TYPE_230X) && (i >= 0x40) && (i < 0x50)) {
3227  uint16_t data;
3228  if (ftdi_read_eeprom_location(ftdi, i, &data)) {
3229  fprintf(stderr, "Reading Factory Configuration Data failed\n");
3230  i = 0x50;
3231  }
3232  value = data;
3233  }
3234  else {
3235  value = output[i*2];
3236  value += output[(i*2)+1] << 8;
3237  }
3238  checksum = value^checksum;
3239  checksum = (checksum << 1) | (checksum >> 15);
3240  }
3241 
3242  output[eeprom->size-2] = checksum;
3243  output[eeprom->size-1] = checksum >> 8;
3244 
3245  eeprom->initialized_for_connected_device = 1;
3246  return user_area_size;
3247 }
3248 /* Decode the encoded EEPROM field for the FTDI Mode into a value for the abstracted
3249  * EEPROM structure
3250  *
3251  * FTD2XX doesn't allow to set multiple bits in the interface mode bitfield, and so do we
3252  */
3253 static unsigned char bit2type(unsigned char bits)
3254 {
3255  switch (bits)
3256  {
3257  case 0: return CHANNEL_IS_UART;
3258  case 1: return CHANNEL_IS_FIFO;
3259  case 2: return CHANNEL_IS_OPTO;
3260  case 4: return CHANNEL_IS_CPU;
3261  case 8: return CHANNEL_IS_FT1284;
3262  default:
3263  fprintf(stderr," Unexpected value %d for Hardware Interface type\n",
3264  bits);
3265  }
3266  return 0;
3267 }
3268 /* Decode 230X / 232R type chips invert bits
3269  * Prints directly to stdout.
3270 */
3271 static void print_inverted_bits(int invert)
3272 {
3273  char *r_bits[] = {"TXD","RXD","RTS","CTS","DTR","DSR","DCD","RI"};
3274  int i;
3275 
3276  fprintf(stdout,"Inverted bits:");
3277  for (i=0; i<8; i++)
3278  if ((invert & (1<<i)) == (1<<i))
3279  fprintf(stdout," %s",r_bits[i]);
3280 
3281  fprintf(stdout,"\n");
3282 }
3297 int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
3298 {
3299  int i, j;
3300  unsigned short checksum, eeprom_checksum, value;
3301  unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
3302  int eeprom_size;
3303  struct ftdi_eeprom *eeprom;
3304  unsigned char *buf = NULL;
3305 
3306  if (ftdi == NULL)
3307  ftdi_error_return(-1,"No context");
3308  if (ftdi->eeprom == NULL)
3309  ftdi_error_return(-1,"No eeprom structure");
3310 
3311  eeprom = ftdi->eeprom;
3312  eeprom_size = eeprom->size;
3313  buf = ftdi->eeprom->buf;
3314 
3315  // Addr 02: Vendor ID
3316  eeprom->vendor_id = buf[0x02] + (buf[0x03] << 8);
3317 
3318  // Addr 04: Product ID
3319  eeprom->product_id = buf[0x04] + (buf[0x05] << 8);
3320 
3321  // Addr 06: Device release number
3322  eeprom->release_number = buf[0x06] + (buf[0x07]<<8);
3323 
3324  // Addr 08: Config descriptor
3325  // Bit 7: always 1
3326  // Bit 6: 1 if this device is self powered, 0 if bus powered
3327  // Bit 5: 1 if this device uses remote wakeup
3328  eeprom->self_powered = buf[0x08] & 0x40;
3329  eeprom->remote_wakeup = buf[0x08] & 0x20;
3330 
3331  // Addr 09: Max power consumption: max power = value * 2 mA
3332  eeprom->max_power = MAX_POWER_MILLIAMP_PER_UNIT * buf[0x09];
3333 
3334  // Addr 0A: Chip configuration
3335  // Bit 7: 0 - reserved
3336  // Bit 6: 0 - reserved
3337  // Bit 5: 0 - reserved
3338  // Bit 4: 1 - Change USB version on BM and 2232C
3339  // Bit 3: 1 - Use the serial number string
3340  // Bit 2: 1 - Enable suspend pull downs for lower power
3341  // Bit 1: 1 - Out EndPoint is Isochronous
3342  // Bit 0: 1 - In EndPoint is Isochronous
3343  //
3344  eeprom->in_is_isochronous = buf[0x0A]&0x01;
3345  eeprom->out_is_isochronous = buf[0x0A]&0x02;
3346  eeprom->suspend_pull_downs = buf[0x0A]&0x04;
3347  eeprom->use_serial = !!(buf[0x0A] & USE_SERIAL_NUM);
3348  eeprom->use_usb_version = !!(buf[0x0A] & USE_USB_VERSION_BIT);
3349 
3350  // Addr 0C: USB version low byte when 0x0A
3351  // Addr 0D: USB version high byte when 0x0A
3352  eeprom->usb_version = buf[0x0C] + (buf[0x0D] << 8);
3353 
3354  // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
3355  // Addr 0F: Length of manufacturer string
3356  manufacturer_size = buf[0x0F]/2;
3357  if (eeprom->manufacturer)
3358  free(eeprom->manufacturer);
3359  if (manufacturer_size > 0)
3360  {
3361  eeprom->manufacturer = malloc(manufacturer_size);
3362  if (eeprom->manufacturer)
3363  {
3364  // Decode manufacturer
3365  i = buf[0x0E] & (eeprom_size -1); // offset
3366  for (j=0; j<manufacturer_size-1; j++)
3367  {
3368  eeprom->manufacturer[j] = buf[2*j+i+2];
3369  }
3370  eeprom->manufacturer[j] = '\0';
3371  }
3372  }
3373  else eeprom->manufacturer = NULL;
3374 
3375  // Addr 10: Offset of the product string + 0x80, calculated later
3376  // Addr 11: Length of product string
3377  if (eeprom->product)
3378  free(eeprom->product);
3379  product_size = buf[0x11]/2;
3380  if (product_size > 0)
3381  {
3382  eeprom->product = malloc(product_size);
3383  if (eeprom->product)
3384  {
3385  // Decode product name
3386  i = buf[0x10] & (eeprom_size -1); // offset
3387  for (j=0; j<product_size-1; j++)
3388  {
3389  eeprom->product[j] = buf[2*j+i+2];
3390  }
3391  eeprom->product[j] = '\0';
3392  }
3393  }
3394  else eeprom->product = NULL;
3395 
3396  // Addr 12: Offset of the serial string + 0x80, calculated later
3397  // Addr 13: Length of serial string
3398  if (eeprom->serial)
3399  free(eeprom->serial);
3400  serial_size = buf[0x13]/2;
3401  if (serial_size > 0)
3402  {
3403  eeprom->serial = malloc(serial_size);
3404  if (eeprom->serial)
3405  {
3406  // Decode serial
3407  i = buf[0x12] & (eeprom_size -1); // offset
3408  for (j=0; j<serial_size-1; j++)
3409  {
3410  eeprom->serial[j] = buf[2*j+i+2];
3411  }
3412  eeprom->serial[j] = '\0';
3413  }
3414  }
3415  else eeprom->serial = NULL;
3416 
3417  // verify checksum
3418  checksum = 0xAAAA;
3419 
3420  for (i = 0; i < eeprom_size/2-1; i++)
3421  {
3422  if ((ftdi->type == TYPE_230X) && (i == 0x12))
3423  {
3424  /* FT230X has a user section in the MTP which is not part of the checksum */
3425  i = 0x40;
3426  }
3427  value = buf[i*2];
3428  value += buf[(i*2)+1] << 8;
3429 
3430  checksum = value^checksum;
3431  checksum = (checksum << 1) | (checksum >> 15);
3432  }
3433 
3434  eeprom_checksum = buf[eeprom_size-2] + (buf[eeprom_size-1] << 8);
3435 
3436  if (eeprom_checksum != checksum)
3437  {
3438  fprintf(stderr, "Checksum Error: %04x %04x\n", checksum, eeprom_checksum);
3439  ftdi_error_return(-1,"EEPROM checksum error");
3440  }
3441 
3442  eeprom->channel_a_type = 0;
3443  if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM))
3444  {
3445  eeprom->chip = -1;
3446  }
3447  else if (ftdi->type == TYPE_2232C)
3448  {
3449  eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
3450  eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
3451  eeprom->high_current_a = buf[0x00] & HIGH_CURRENT_DRIVE;
3452  eeprom->channel_b_type = buf[0x01] & 0x7;
3453  eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3454  eeprom->high_current_b = buf[0x01] & HIGH_CURRENT_DRIVE;
3455  eeprom->chip = buf[0x14];
3456  }
3457  else if (ftdi->type == TYPE_R)
3458  {
3459  /* TYPE_R flags D2XX, not VCP as all others*/
3460  eeprom->channel_a_driver = ~buf[0x00] & DRIVER_VCP;
3461  eeprom->high_current = buf[0x00] & HIGH_CURRENT_DRIVE_R;
3462  eeprom->external_oscillator = buf[0x00] & 0x02;
3463  if ( (buf[0x01]&0x40) != 0x40)
3464  fprintf(stderr,
3465  "TYPE_R EEPROM byte[0x01] Bit 6 unexpected Endpoint size."
3466  " If this happened with the\n"
3467  " EEPROM programmed by FTDI tools, please report "
3468  "to libftdi@developer.intra2net.com\n");
3469 
3470  eeprom->chip = buf[0x16];
3471  // Addr 0B: Invert data lines
3472  // Works only on FT232R, not FT245R, but no way to distinguish
3473  eeprom->invert = buf[0x0B];
3474  // Addr 14: CBUS function: CBUS0, CBUS1
3475  // Addr 15: CBUS function: CBUS2, CBUS3
3476  // Addr 16: CBUS function: CBUS5
3477  eeprom->cbus_function[0] = buf[0x14] & 0x0f;
3478  eeprom->cbus_function[1] = (buf[0x14] >> 4) & 0x0f;
3479  eeprom->cbus_function[2] = buf[0x15] & 0x0f;
3480  eeprom->cbus_function[3] = (buf[0x15] >> 4) & 0x0f;
3481  eeprom->cbus_function[4] = buf[0x16] & 0x0f;
3482  }
3483  else if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3484  {
3485  eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
3486  eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3487 
3488  if (ftdi->type == TYPE_2232H)
3489  {
3490  eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
3491  eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
3492  eeprom->suspend_dbus7 = buf[0x01] & SUSPEND_DBUS7_BIT;
3493  }
3494  else
3495  {
3496  eeprom->channel_c_driver = (buf[0x00] >> 4) & DRIVER_VCP;
3497  eeprom->channel_d_driver = (buf[0x01] >> 4) & DRIVER_VCP;
3498  eeprom->channel_a_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 0);
3499  eeprom->channel_b_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 1);
3500  eeprom->channel_c_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 2);
3501  eeprom->channel_d_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 3);
3502  }
3503 
3504  eeprom->chip = buf[0x18];
3505  eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3506  eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3507  eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3508  eeprom->group1_drive = (buf[0x0c] >> 4) & 0x3;
3509  eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
3510  eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
3511  eeprom->group2_drive = buf[0x0d] & DRIVE_16MA;
3512  eeprom->group2_schmitt = buf[0x0d] & IS_SCHMITT;
3513  eeprom->group2_slew = buf[0x0d] & SLOW_SLEW;
3514  eeprom->group3_drive = (buf[0x0d] >> 4) & DRIVE_16MA;
3515  eeprom->group3_schmitt = (buf[0x0d] >> 4) & IS_SCHMITT;
3516  eeprom->group3_slew = (buf[0x0d] >> 4) & SLOW_SLEW;
3517  }
3518  else if (ftdi->type == TYPE_232H)
3519  {
3520  eeprom->channel_a_type = buf[0x00] & 0xf;
3521  eeprom->channel_a_driver = (buf[0x00] & DRIVER_VCPH)?DRIVER_VCP:0;
3522  eeprom->clock_polarity = buf[0x01] & FT1284_CLK_IDLE_STATE;
3523  eeprom->data_order = buf[0x01] & FT1284_DATA_LSB;
3524  eeprom->flow_control = buf[0x01] & FT1284_FLOW_CONTROL;
3525  eeprom->powersave = buf[0x01] & POWER_SAVE_DISABLE_H;
3526  eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3527  eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3528  eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3529  eeprom->group1_drive = buf[0x0d] & DRIVE_16MA;
3530  eeprom->group1_schmitt = buf[0x0d] & IS_SCHMITT;
3531  eeprom->group1_slew = buf[0x0d] & SLOW_SLEW;
3532 
3533  for(i=0; i<5; i++)
3534  {
3535  eeprom->cbus_function[2*i ] = buf[0x18+i] & 0x0f;
3536  eeprom->cbus_function[2*i+1] = (buf[0x18+i] >> 4) & 0x0f;
3537  }
3538  eeprom->chip = buf[0x1e];
3539  /*FIXME: Decipher more values*/
3540  }
3541  else if (ftdi->type == TYPE_230X)
3542  {
3543  for(i=0; i<4; i++)
3544  {
3545  eeprom->cbus_function[i] = buf[0x1a + i] & 0xFF;
3546  }
3547  eeprom->group0_drive = buf[0x0c] & 0x03;
3548  eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3549  eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3550  eeprom->group1_drive = (buf[0x0c] >> 4) & 0x03;
3551  eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
3552  eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
3553 
3554  eeprom->invert = buf[0xb];
3555  }
3556 
3557  if (verbose)
3558  {
3559  char *channel_mode[] = {"UART", "FIFO", "CPU", "OPTO", "FT1284"};
3560  fprintf(stdout, "VID: 0x%04x\n",eeprom->vendor_id);
3561  fprintf(stdout, "PID: 0x%04x\n",eeprom->product_id);
3562  fprintf(stdout, "Release: 0x%04x\n",eeprom->release_number);
3563 
3564  if (eeprom->self_powered)
3565  fprintf(stdout, "Self-Powered%s", (eeprom->remote_wakeup)?", USB Remote Wake Up\n":"\n");
3566  else
3567  fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power,
3568  (eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
3569  if (eeprom->manufacturer)
3570  fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
3571  if (eeprom->product)
3572  fprintf(stdout, "Product: %s\n",eeprom->product);
3573  if (eeprom->serial)
3574  fprintf(stdout, "Serial: %s\n",eeprom->serial);
3575  fprintf(stdout, "Checksum : %04x\n", checksum);
3576  if (ftdi->type == TYPE_R) {
3577  fprintf(stdout, "Internal EEPROM\n");
3578  fprintf(stdout,"Oscillator: %s\n", eeprom->external_oscillator?"External":"Internal");
3579  }
3580  else if (eeprom->chip >= 0x46)
3581  fprintf(stdout, "Attached EEPROM: 93x%02x\n", eeprom->chip);
3582  if (eeprom->suspend_dbus7)
3583  fprintf(stdout, "Suspend on DBUS7\n");
3584  if (eeprom->suspend_pull_downs)
3585  fprintf(stdout, "Pull IO pins low during suspend\n");
3586  if(eeprom->powersave)
3587  {
3588  if(ftdi->type >= TYPE_232H)
3589  fprintf(stdout,"Enter low power state on ACBUS7\n");
3590  }
3591  if (eeprom->remote_wakeup)
3592  fprintf(stdout, "Enable Remote Wake Up\n");
3593  fprintf(stdout, "PNP: %d\n",(eeprom->is_not_pnp)?0:1);
3594  if (ftdi->type >= TYPE_2232C)
3595  fprintf(stdout,"Channel A has Mode %s%s%s\n",
3596  channel_mode[eeprom->channel_a_type],
3597  (eeprom->channel_a_driver)?" VCP":"",
3598  (eeprom->high_current_a)?" High Current IO":"");
3599  if (ftdi->type == TYPE_232H)
3600  {
3601  fprintf(stdout,"FT1284 Mode Clock is idle %s, %s first, %sFlow Control\n",
3602  (eeprom->clock_polarity)?"HIGH":"LOW",
3603  (eeprom->data_order)?"LSB":"MSB",
3604  (eeprom->flow_control)?"":"No ");
3605  }
3606  if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3607  fprintf(stdout,"Channel B has Mode %s%s%s\n",
3608  channel_mode[eeprom->channel_b_type],
3609  (eeprom->channel_b_driver)?" VCP":"",
3610  (eeprom->high_current_b)?" High Current IO":"");
3611  if (((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C)) &&
3612  eeprom->use_usb_version)
3613  fprintf(stdout,"Use explicit USB Version %04x\n",eeprom->usb_version);
3614 
3615  if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
3616  {
3617  fprintf(stdout,"%s has %d mA drive%s%s\n",
3618  (ftdi->type == TYPE_2232H)?"AL":"A",
3619  (eeprom->group0_drive+1) *4,
3620  (eeprom->group0_schmitt)?" Schmitt Input":"",
3621  (eeprom->group0_slew)?" Slow Slew":"");
3622  fprintf(stdout,"%s has %d mA drive%s%s\n",
3623  (ftdi->type == TYPE_2232H)?"AH":"B",
3624  (eeprom->group1_drive+1) *4,
3625  (eeprom->group1_schmitt)?" Schmitt Input":"",
3626  (eeprom->group1_slew)?" Slow Slew":"");
3627  fprintf(stdout,"%s has %d mA drive%s%s\n",
3628  (ftdi->type == TYPE_2232H)?"BL":"C",
3629  (eeprom->group2_drive+1) *4,
3630  (eeprom->group2_schmitt)?" Schmitt Input":"",
3631  (eeprom->group2_slew)?" Slow Slew":"");
3632  fprintf(stdout,"%s has %d mA drive%s%s\n",
3633  (ftdi->type == TYPE_2232H)?"BH":"D",
3634  (eeprom->group3_drive+1) *4,
3635  (eeprom->group3_schmitt)?" Schmitt Input":"",
3636  (eeprom->group3_slew)?" Slow Slew":"");
3637  }
3638  else if (ftdi->type == TYPE_232H)
3639  {
3640  char *cbush_mux[] = {"TRISTATE","TXLED","RXLED", "TXRXLED","PWREN",
3641  "SLEEP","DRIVE_0","DRIVE_1","IOMODE","TXDEN",
3642  "CLK30","CLK15","CLK7_5"
3643  };
3644  fprintf(stdout,"ACBUS has %d mA drive%s%s\n",
3645  (eeprom->group0_drive+1) *4,
3646  (eeprom->group0_schmitt)?" Schmitt Input":"",
3647  (eeprom->group0_slew)?" Slow Slew":"");
3648  fprintf(stdout,"ADBUS has %d mA drive%s%s\n",
3649  (eeprom->group1_drive+1) *4,
3650  (eeprom->group1_schmitt)?" Schmitt Input":"",
3651  (eeprom->group1_slew)?" Slow Slew":"");
3652  for (i=0; i<10; i++)
3653  {
3654  if (eeprom->cbus_function[i]<= CBUSH_CLK7_5 )
3655  fprintf(stdout,"C%d Function: %s\n", i,
3656  cbush_mux[eeprom->cbus_function[i]]);
3657  }
3658  }
3659  else if (ftdi->type == TYPE_230X)
3660  {
3661  char *cbusx_mux[] = {"TRISTATE","TXLED","RXLED", "TXRXLED","PWREN",
3662  "SLEEP","DRIVE_0","DRIVE_1","IOMODE","TXDEN",
3663  "CLK24","CLK12","CLK6","BAT_DETECT","BAT_DETECT#",
3664  "I2C_TXE#", "I2C_RXF#", "VBUS_SENSE", "BB_WR#",
3665  "BBRD#", "TIME_STAMP", "AWAKE#",
3666  };
3667  fprintf(stdout,"DBUS has %d mA drive%s%s\n",
3668  (eeprom->group0_drive+1) *4,
3669  (eeprom->group0_schmitt)?" Schmitt Input":"",
3670  (eeprom->group0_slew)?" Slow Slew":"");
3671  fprintf(stdout,"CBUS has %d mA drive%s%s\n",
3672  (eeprom->group1_drive+1) *4,
3673  (eeprom->group1_schmitt)?" Schmitt Input":"",
3674  (eeprom->group1_slew)?" Slow Slew":"");
3675  for (i=0; i<4; i++)
3676  {
3677  if (eeprom->cbus_function[i]<= CBUSX_AWAKE)
3678  fprintf(stdout,"CBUS%d Function: %s\n", i, cbusx_mux[eeprom->cbus_function[i]]);
3679  }
3680 
3681  if (eeprom->invert)
3682  print_inverted_bits(eeprom->invert);
3683  }
3684 
3685  if (ftdi->type == TYPE_R)
3686  {
3687  char *cbus_mux[] = {"TXDEN","PWREN","RXLED", "TXLED","TX+RXLED",
3688  "SLEEP","CLK48","CLK24","CLK12","CLK6",
3689  "IOMODE","BB_WR","BB_RD"
3690  };
3691  char *cbus_BB[] = {"RXF","TXE","RD", "WR"};
3692 
3693  if (eeprom->invert)
3694  print_inverted_bits(eeprom->invert);
3695 
3696  for (i=0; i<5; i++)
3697  {
3698  if (eeprom->cbus_function[i]<=CBUS_BB_RD)
3699  fprintf(stdout,"C%d Function: %s\n", i,
3700  cbus_mux[eeprom->cbus_function[i]]);
3701  else
3702  {
3703  if (i < 4)
3704  /* Running MPROG show that C0..3 have fixed function Synchronous
3705  Bit Bang mode */
3706  fprintf(stdout,"C%d BB Function: %s\n", i,
3707  cbus_BB[i]);
3708  else
3709  fprintf(stdout, "Unknown CBUS mode. Might be special mode?\n");
3710  }
3711  }
3712  }
3713  }
3714  return 0;
3715 }
3716 
3727 int ftdi_get_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int* value)
3728 {
3729  switch (value_name)
3730  {
3731  case VENDOR_ID:
3732  *value = ftdi->eeprom->vendor_id;
3733  break;
3734  case PRODUCT_ID:
3735  *value = ftdi->eeprom->product_id;
3736  break;
3737  case RELEASE_NUMBER:
3738  *value = ftdi->eeprom->release_number;
3739  break;
3740  case SELF_POWERED:
3741  *value = ftdi->eeprom->self_powered;
3742  break;
3743  case REMOTE_WAKEUP:
3744  *value = ftdi->eeprom->remote_wakeup;
3745  break;
3746  case IS_NOT_PNP:
3747  *value = ftdi->eeprom->is_not_pnp;
3748  break;
3749  case SUSPEND_DBUS7:
3750  *value = ftdi->eeprom->suspend_dbus7;
3751  break;
3752  case IN_IS_ISOCHRONOUS:
3753  *value = ftdi->eeprom->in_is_isochronous;
3754  break;
3755  case OUT_IS_ISOCHRONOUS:
3756  *value = ftdi->eeprom->out_is_isochronous;
3757  break;
3758  case SUSPEND_PULL_DOWNS:
3759  *value = ftdi->eeprom->suspend_pull_downs;
3760  break;
3761  case USE_SERIAL:
3762  *value = ftdi->eeprom->use_serial;
3763  break;
3764  case USB_VERSION:
3765  *value = ftdi->eeprom->usb_version;
3766  break;
3767  case USE_USB_VERSION:
3768  *value = ftdi->eeprom->use_usb_version;
3769  break;
3770  case MAX_POWER:
3771  *value = ftdi->eeprom->max_power;
3772  break;
3773  case CHANNEL_A_TYPE:
3774  *value = ftdi->eeprom->channel_a_type;
3775  break;
3776  case CHANNEL_B_TYPE:
3777  *value = ftdi->eeprom->channel_b_type;
3778  break;
3779  case CHANNEL_A_DRIVER:
3780  *value = ftdi->eeprom->channel_a_driver;
3781  break;
3782  case CHANNEL_B_DRIVER:
3783  *value = ftdi->eeprom->channel_b_driver;
3784  break;
3785  case CHANNEL_C_DRIVER:
3786  *value = ftdi->eeprom->channel_c_driver;
3787  break;
3788  case CHANNEL_D_DRIVER:
3789  *value = ftdi->eeprom->channel_d_driver;
3790  break;
3791  case CHANNEL_A_RS485:
3792  *value = ftdi->eeprom->channel_a_rs485enable;
3793  break;
3794  case CHANNEL_B_RS485:
3795  *value = ftdi->eeprom->channel_b_rs485enable;
3796  break;
3797  case CHANNEL_C_RS485:
3798  *value = ftdi->eeprom->channel_c_rs485enable;
3799  break;
3800  case CHANNEL_D_RS485:
3801  *value = ftdi->eeprom->channel_d_rs485enable;
3802  break;
3803  case CBUS_FUNCTION_0:
3804  *value = ftdi->eeprom->cbus_function[0];
3805  break;
3806  case CBUS_FUNCTION_1:
3807  *value = ftdi->eeprom->cbus_function[1];
3808  break;
3809  case CBUS_FUNCTION_2:
3810  *value = ftdi->eeprom->cbus_function[2];
3811  break;
3812  case CBUS_FUNCTION_3:
3813  *value = ftdi->eeprom->cbus_function[3];
3814  break;
3815  case CBUS_FUNCTION_4:
3816  *value = ftdi->eeprom->cbus_function[4];
3817  break;
3818  case CBUS_FUNCTION_5:
3819  *value = ftdi->eeprom->cbus_function[5];
3820  break;
3821  case CBUS_FUNCTION_6:
3822  *value = ftdi->eeprom->cbus_function[6];
3823  break;
3824  case CBUS_FUNCTION_7:
3825  *value = ftdi->eeprom->cbus_function[7];
3826  break;
3827  case CBUS_FUNCTION_8:
3828  *value = ftdi->eeprom->cbus_function[8];
3829  break;
3830  case CBUS_FUNCTION_9:
3831  *value = ftdi->eeprom->cbus_function[9];
3832  break;
3833  case HIGH_CURRENT:
3834  *value = ftdi->eeprom->high_current;
3835  break;
3836  case HIGH_CURRENT_A:
3837  *value = ftdi->eeprom->high_current_a;
3838  break;
3839  case HIGH_CURRENT_B:
3840  *value = ftdi->eeprom->high_current_b;
3841  break;
3842  case INVERT:
3843  *value = ftdi->eeprom->invert;
3844  break;
3845  case GROUP0_DRIVE:
3846  *value = ftdi->eeprom->group0_drive;
3847  break;
3848  case GROUP0_SCHMITT:
3849  *value = ftdi->eeprom->group0_schmitt;
3850  break;
3851  case GROUP0_SLEW:
3852  *value = ftdi->eeprom->group0_slew;
3853  break;
3854  case GROUP1_DRIVE:
3855  *value = ftdi->eeprom->group1_drive;
3856  break;
3857  case GROUP1_SCHMITT:
3858  *value = ftdi->eeprom->group1_schmitt;
3859  break;
3860  case GROUP1_SLEW:
3861  *value = ftdi->eeprom->group1_slew;
3862  break;
3863  case GROUP2_DRIVE:
3864  *value = ftdi->eeprom->group2_drive;
3865  break;
3866  case GROUP2_SCHMITT:
3867  *value = ftdi->eeprom->group2_schmitt;
3868  break;
3869  case GROUP2_SLEW:
3870  *value = ftdi->eeprom->group2_slew;
3871  break;
3872  case GROUP3_DRIVE:
3873  *value = ftdi->eeprom->group3_drive;
3874  break;
3875  case GROUP3_SCHMITT:
3876  *value = ftdi->eeprom->group3_schmitt;
3877  break;
3878  case GROUP3_SLEW:
3879  *value = ftdi->eeprom->group3_slew;
3880  break;
3881  case POWER_SAVE:
3882  *value = ftdi->eeprom->powersave;
3883  break;
3884  case CLOCK_POLARITY:
3885  *value = ftdi->eeprom->clock_polarity;
3886  break;
3887  case DATA_ORDER:
3888  *value = ftdi->eeprom->data_order;
3889  break;
3890  case FLOW_CONTROL:
3891  *value = ftdi->eeprom->flow_control;
3892  break;
3893  case CHIP_TYPE:
3894  *value = ftdi->eeprom->chip;
3895  break;
3896  case CHIP_SIZE:
3897  *value = ftdi->eeprom->size;
3898  break;
3899  case EXTERNAL_OSCILLATOR:
3900  *value = ftdi->eeprom->external_oscillator;
3901  break;
3902  default:
3903  ftdi_error_return(-1, "Request for unknown EEPROM value");
3904  }
3905  return 0;
3906 }
3907 
3920 int ftdi_set_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int value)
3921 {
3922  switch (value_name)
3923  {
3924  case VENDOR_ID:
3925  ftdi->eeprom->vendor_id = value;
3926  break;
3927  case PRODUCT_ID:
3928  ftdi->eeprom->product_id = value;
3929  break;
3930  case RELEASE_NUMBER:
3931  ftdi->eeprom->release_number = value;
3932  break;
3933  case SELF_POWERED:
3934  ftdi->eeprom->self_powered = value;
3935  break;
3936  case REMOTE_WAKEUP:
3937  ftdi->eeprom->remote_wakeup = value;
3938  break;
3939  case IS_NOT_PNP:
3940  ftdi->eeprom->is_not_pnp = value;
3941  break;
3942  case SUSPEND_DBUS7:
3943  ftdi->eeprom->suspend_dbus7 = value;
3944  break;
3945  case IN_IS_ISOCHRONOUS:
3946  ftdi->eeprom->in_is_isochronous = value;
3947  break;
3948  case OUT_IS_ISOCHRONOUS:
3949  ftdi->eeprom->out_is_isochronous = value;
3950  break;
3951  case SUSPEND_PULL_DOWNS:
3952  ftdi->eeprom->suspend_pull_downs = value;
3953  break;
3954  case USE_SERIAL:
3955  ftdi->eeprom->use_serial = value;
3956  break;
3957  case USB_VERSION:
3958  ftdi->eeprom->usb_version = value;
3959  break;
3960  case USE_USB_VERSION:
3961  ftdi->eeprom->use_usb_version = value;
3962  break;
3963  case MAX_POWER:
3964  ftdi->eeprom->max_power = value;
3965  break;
3966  case CHANNEL_A_TYPE:
3967  ftdi->eeprom->channel_a_type = value;
3968  break;
3969  case CHANNEL_B_TYPE:
3970  ftdi->eeprom->channel_b_type = value;
3971  break;
3972  case CHANNEL_A_DRIVER:
3973  ftdi->eeprom->channel_a_driver = value;
3974  break;
3975  case CHANNEL_B_DRIVER:
3976  ftdi->eeprom->channel_b_driver = value;
3977  break;
3978  case CHANNEL_C_DRIVER:
3979  ftdi->eeprom->channel_c_driver = value;
3980  break;
3981  case CHANNEL_D_DRIVER:
3982  ftdi->eeprom->channel_d_driver = value;
3983  break;
3984  case CHANNEL_A_RS485:
3985  ftdi->eeprom->channel_a_rs485enable = value;
3986  break;
3987  case CHANNEL_B_RS485:
3988  ftdi->eeprom->channel_b_rs485enable = value;
3989  break;
3990  case CHANNEL_C_RS485:
3991  ftdi->eeprom->channel_c_rs485enable = value;
3992  break;
3993  case CHANNEL_D_RS485:
3994  ftdi->eeprom->channel_d_rs485enable = value;
3995  break;
3996  case CBUS_FUNCTION_0:
3997  ftdi->eeprom->cbus_function[0] = value;
3998  break;
3999  case CBUS_FUNCTION_1:
4000  ftdi->eeprom->cbus_function[1] = value;
4001  break;
4002  case CBUS_FUNCTION_2:
4003  ftdi->eeprom->cbus_function[2] = value;
4004  break;
4005  case CBUS_FUNCTION_3:
4006  ftdi->eeprom->cbus_function[3] = value;
4007  break;
4008  case CBUS_FUNCTION_4:
4009  ftdi->eeprom->cbus_function[4] = value;
4010  break;
4011  case CBUS_FUNCTION_5:
4012  ftdi->eeprom->cbus_function[5] = value;
4013  break;
4014  case CBUS_FUNCTION_6:
4015  ftdi->eeprom->cbus_function[6] = value;
4016  break;
4017  case CBUS_FUNCTION_7:
4018  ftdi->eeprom->cbus_function[7] = value;
4019  break;
4020  case CBUS_FUNCTION_8:
4021  ftdi->eeprom->cbus_function[8] = value;
4022  break;
4023  case CBUS_FUNCTION_9:
4024  ftdi->eeprom->cbus_function[9] = value;
4025  break;
4026  case HIGH_CURRENT:
4027  ftdi->eeprom->high_current = value;
4028  break;
4029  case HIGH_CURRENT_A:
4030  ftdi->eeprom->high_current_a = value;
4031  break;
4032  case HIGH_CURRENT_B:
4033  ftdi->eeprom->high_current_b = value;
4034  break;
4035  case INVERT:
4036  ftdi->eeprom->invert = value;
4037  break;
4038  case GROUP0_DRIVE:
4039  ftdi->eeprom->group0_drive = value;
4040  break;
4041  case GROUP0_SCHMITT:
4042  ftdi->eeprom->group0_schmitt = value;
4043  break;
4044  case GROUP0_SLEW:
4045  ftdi->eeprom->group0_slew = value;
4046  break;
4047  case GROUP1_DRIVE:
4048  ftdi->eeprom->group1_drive = value;
4049  break;
4050  case GROUP1_SCHMITT:
4051  ftdi->eeprom->group1_schmitt = value;
4052  break;
4053  case GROUP1_SLEW:
4054  ftdi->eeprom->group1_slew = value;
4055  break;
4056  case GROUP2_DRIVE:
4057  ftdi->eeprom->group2_drive = value;
4058  break;
4059  case GROUP2_SCHMITT:
4060  ftdi->eeprom->group2_schmitt = value;
4061  break;
4062  case GROUP2_SLEW:
4063  ftdi->eeprom->group2_slew = value;
4064  break;
4065  case GROUP3_DRIVE:
4066  ftdi->eeprom->group3_drive = value;
4067  break;
4068  case GROUP3_SCHMITT:
4069  ftdi->eeprom->group3_schmitt = value;
4070  break;
4071  case GROUP3_SLEW:
4072  ftdi->eeprom->group3_slew = value;
4073  break;
4074  case CHIP_TYPE:
4075  ftdi->eeprom->chip = value;
4076  break;
4077  case POWER_SAVE:
4078  ftdi->eeprom->powersave = value;
4079  break;
4080  case CLOCK_POLARITY:
4081  ftdi->eeprom->clock_polarity = value;
4082  break;
4083  case DATA_ORDER:
4084  ftdi->eeprom->data_order = value;
4085  break;
4086  case FLOW_CONTROL:
4087  ftdi->eeprom->flow_control = value;
4088  break;
4089  case CHIP_SIZE:
4090  ftdi_error_return(-2, "EEPROM Value can't be changed");
4091  break;
4092  case EXTERNAL_OSCILLATOR:
4093  ftdi->eeprom->external_oscillator = value;
4094  break;
4095  case USER_DATA_ADDR:
4096  ftdi->eeprom->user_data_addr = value;
4097  break;
4098 
4099  default :
4100  ftdi_error_return(-1, "Request to unknown EEPROM value");
4101  }
4102  ftdi->eeprom->initialized_for_connected_device = 0;
4103  return 0;
4104 }
4105 
4116 int ftdi_get_eeprom_buf(struct ftdi_context *ftdi, unsigned char * buf, int size)
4117 {
4118  if (!ftdi || !(ftdi->eeprom))
4119  ftdi_error_return(-1, "No appropriate structure");
4120 
4121  if (!buf || size < ftdi->eeprom->size)
4122  ftdi_error_return(-1, "Not enough room to store eeprom");
4123 
4124  // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
4125  if (size > FTDI_MAX_EEPROM_SIZE)
4126  size = FTDI_MAX_EEPROM_SIZE;
4127 
4128  memcpy(buf, ftdi->eeprom->buf, size);
4129 
4130  return 0;
4131 }
4132 
4142 int ftdi_set_eeprom_buf(struct ftdi_context *ftdi, const unsigned char * buf, int size)
4143 {
4144  if (!ftdi || !(ftdi->eeprom) || !buf)
4145  ftdi_error_return(-1, "No appropriate structure");
4146 
4147  // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
4148  if (size > FTDI_MAX_EEPROM_SIZE)
4149  size = FTDI_MAX_EEPROM_SIZE;
4150 
4151  memcpy(ftdi->eeprom->buf, buf, size);
4152 
4153  return 0;
4154 }
4155 
4165 int ftdi_set_eeprom_user_data(struct ftdi_context *ftdi, const char * buf, int size)
4166 {
4167  if (!ftdi || !(ftdi->eeprom) || !buf)
4168  ftdi_error_return(-1, "No appropriate structure");
4169 
4170  ftdi->eeprom->user_data_size = size;
4171  ftdi->eeprom->user_data = buf;
4172  return 0;
4173 }
4174 
4186 int ftdi_read_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short *eeprom_val)
4187 {
4188  if (ftdi == NULL || ftdi->usb_dev == NULL)
4189  ftdi_error_return(-2, "USB device unavailable");
4190 
4191  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, eeprom_addr, (unsigned char *)eeprom_val, 2, ftdi->usb_read_timeout) != 2)
4192  ftdi_error_return(-1, "reading eeprom failed");
4193 
4194  return 0;
4195 }
4196 
4206 int ftdi_read_eeprom(struct ftdi_context *ftdi)
4207 {
4208  int i;
4209  unsigned char *buf;
4210 
4211  if (ftdi == NULL || ftdi->usb_dev == NULL)
4212  ftdi_error_return(-2, "USB device unavailable");
4213  buf = ftdi->eeprom->buf;
4214 
4215  for (i = 0; i < FTDI_MAX_EEPROM_SIZE/2; i++)
4216  {
4217  if (libusb_control_transfer(
4218  ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE,SIO_READ_EEPROM_REQUEST, 0, i,
4219  buf+(i*2), 2, ftdi->usb_read_timeout) != 2)
4220  ftdi_error_return(-1, "reading eeprom failed");
4221  }
4222 
4223  if (ftdi->type == TYPE_R)
4224  ftdi->eeprom->size = 0x80;
4225  /* Guesses size of eeprom by comparing halves
4226  - will not work with blank eeprom */
4227  else if (strrchr((const char *)buf, 0xff) == ((const char *)buf +FTDI_MAX_EEPROM_SIZE -1))
4228  ftdi->eeprom->size = -1;
4229  else if (memcmp(buf,&buf[0x80],0x80) == 0)
4230  ftdi->eeprom->size = 0x80;
4231  else if (memcmp(buf,&buf[0x40],0x40) == 0)
4232  ftdi->eeprom->size = 0x40;
4233  else
4234  ftdi->eeprom->size = 0x100;
4235  return 0;
4236 }
4237 
4238 /*
4239  ftdi_read_chipid_shift does the bitshift operation needed for the FTDIChip-ID
4240  Function is only used internally
4241  \internal
4242 */
4243 static unsigned char ftdi_read_chipid_shift(unsigned char value)
4244 {
4245  return ((value & 1) << 1) |
4246  ((value & 2) << 5) |
4247  ((value & 4) >> 2) |
4248  ((value & 8) << 4) |
4249  ((value & 16) >> 1) |
4250  ((value & 32) >> 1) |
4251  ((value & 64) >> 4) |
4252  ((value & 128) >> 2);
4253 }
4254 
4265 int ftdi_read_chipid(struct ftdi_context *ftdi, unsigned int *chipid)
4266 {
4267  unsigned int a = 0, b = 0;
4268 
4269  if (ftdi == NULL || ftdi->usb_dev == NULL)
4270  ftdi_error_return(-2, "USB device unavailable");
4271 
4272  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x43, (unsigned char *)&a, 2, ftdi->usb_read_timeout) == 2)
4273  {
4274  a = a << 8 | a >> 8;
4275  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x44, (unsigned char *)&b, 2, ftdi->usb_read_timeout) == 2)
4276  {
4277  b = b << 8 | b >> 8;
4278  a = (a << 16) | (b & 0xFFFF);
4279  a = ftdi_read_chipid_shift(a) | ftdi_read_chipid_shift(a>>8)<<8
4280  | ftdi_read_chipid_shift(a>>16)<<16 | ftdi_read_chipid_shift(a>>24)<<24;
4281  *chipid = a ^ 0xa5f0f7d1;
4282  return 0;
4283  }
4284  }
4285 
4286  ftdi_error_return(-1, "read of FTDIChip-ID failed");
4287 }
4288 
4303 int ftdi_write_eeprom_location(struct ftdi_context *ftdi, int eeprom_addr,
4304  unsigned short eeprom_val)
4305 {
4306  int chip_type_location;
4307  unsigned short chip_type;
4308 
4309  if (ftdi == NULL || ftdi->usb_dev == NULL)
4310  ftdi_error_return(-2, "USB device unavailable");
4311 
4312  if (eeprom_addr <0x80)
4313  ftdi_error_return(-2, "Invalid access to checksum protected area below 0x80");
4314 
4315 
4316  switch (ftdi->type)
4317  {
4318  case TYPE_BM:
4319  case TYPE_2232C:
4320  chip_type_location = 0x14;
4321  break;
4322  case TYPE_2232H:
4323  case TYPE_4232H:
4324  chip_type_location = 0x18;
4325  break;
4326  case TYPE_232H:
4327  chip_type_location = 0x1e;
4328  break;
4329  default:
4330  ftdi_error_return(-4, "Device can't access unprotected area");
4331  }
4332 
4333  if (ftdi_read_eeprom_location( ftdi, chip_type_location>>1, &chip_type))
4334  ftdi_error_return(-5, "Reading failed");
4335  fprintf(stderr," loc 0x%04x val 0x%04x\n", chip_type_location,chip_type);
4336  if ((chip_type & 0xff) != 0x66)
4337  {
4338  ftdi_error_return(-6, "EEPROM is not of 93x66");
4339  }
4340 
4341  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4342  SIO_WRITE_EEPROM_REQUEST, eeprom_val, eeprom_addr,
4343  NULL, 0, ftdi->usb_write_timeout) != 0)
4344  ftdi_error_return(-1, "unable to write eeprom");
4345 
4346  return 0;
4347 }
4348 
4359 int ftdi_write_eeprom(struct ftdi_context *ftdi)
4360 {
4361  unsigned short usb_val, status;
4362  int i, ret;
4363  unsigned char *eeprom;
4364 
4365  if (ftdi == NULL || ftdi->usb_dev == NULL)
4366  ftdi_error_return(-2, "USB device unavailable");
4367 
4368  if(ftdi->eeprom->initialized_for_connected_device == 0)
4369  ftdi_error_return(-3, "EEPROM not initialized for the connected device");
4370 
4371  eeprom = ftdi->eeprom->buf;
4372 
4373  /* These commands were traced while running MProg */
4374  if ((ret = ftdi_usb_reset(ftdi)) != 0)
4375  return ret;
4376  if ((ret = ftdi_poll_modem_status(ftdi, &status)) != 0)
4377  return ret;
4378  if ((ret = ftdi_set_latency_timer(ftdi, 0x77)) != 0)
4379  return ret;
4380 
4381  for (i = 0; i < ftdi->eeprom->size/2; i++)
4382  {
4383  /* Do not try to write to reserved area */
4384  if ((ftdi->type == TYPE_230X) && (i == 0x40))
4385  {
4386  i = 0x50;
4387  }
4388  usb_val = eeprom[i*2];
4389  usb_val += eeprom[(i*2)+1] << 8;
4390  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4391  SIO_WRITE_EEPROM_REQUEST, usb_val, i,
4392  NULL, 0, ftdi->usb_write_timeout) < 0)
4393  ftdi_error_return(-1, "unable to write eeprom");
4394  }
4395 
4396  return 0;
4397 }
4398 
4413 #define MAGIC 0x55aa
4414 int ftdi_erase_eeprom(struct ftdi_context *ftdi)
4415 {
4416  unsigned short eeprom_value;
4417  if (ftdi == NULL || ftdi->usb_dev == NULL)
4418  ftdi_error_return(-2, "USB device unavailable");
4419 
4420  if ((ftdi->type == TYPE_R) || (ftdi->type == TYPE_230X))
4421  {
4422  ftdi->eeprom->chip = 0;
4423  return 0;
4424  }
4425 
4426  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
4427  0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
4428  ftdi_error_return(-1, "unable to erase eeprom");
4429 
4430 
4431  /* detect chip type by writing 0x55AA as magic at word position 0xc0
4432  Chip is 93x46 if magic is read at word position 0x00, as wraparound happens around 0x40
4433  Chip is 93x56 if magic is read at word position 0x40, as wraparound happens around 0x80
4434  Chip is 93x66 if magic is only read at word position 0xc0*/
4435  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4436  SIO_WRITE_EEPROM_REQUEST, MAGIC, 0xc0,
4437  NULL, 0, ftdi->usb_write_timeout) != 0)
4438  ftdi_error_return(-3, "Writing magic failed");
4439  if (ftdi_read_eeprom_location( ftdi, 0x00, &eeprom_value))
4440  ftdi_error_return(-4, "Reading failed");
4441  if (eeprom_value == MAGIC)
4442  {
4443  ftdi->eeprom->chip = 0x46;
4444  }
4445  else
4446  {
4447  if (ftdi_read_eeprom_location( ftdi, 0x40, &eeprom_value))
4448  ftdi_error_return(-4, "Reading failed");
4449  if (eeprom_value == MAGIC)
4450  ftdi->eeprom->chip = 0x56;
4451  else
4452  {
4453  if (ftdi_read_eeprom_location( ftdi, 0xc0, &eeprom_value))
4454  ftdi_error_return(-4, "Reading failed");
4455  if (eeprom_value == MAGIC)
4456  ftdi->eeprom->chip = 0x66;
4457  else
4458  {
4459  ftdi->eeprom->chip = -1;
4460  }
4461  }
4462  }
4463  if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
4464  0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
4465  ftdi_error_return(-1, "unable to erase eeprom");
4466  return 0;
4467 }
4468 
4476 char *ftdi_get_error_string (struct ftdi_context *ftdi)
4477 {
4478  if (ftdi == NULL)
4479  return "";
4480 
4481  return ftdi->error_str;
4482 }
4483 
4484 /* @} end of doxygen libftdi group */
convert_baudrate_UT_export
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Wrapper function to export ftdi_convert_baudrate() to the unit test Do not use, it's only for the uni...
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Definition: ftdi_i.h:30
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Definition: ftdi.c:2669
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Definition: ftdi_i.h:141
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Definition: ftdi.c:4116
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Definition: ftdi.h:54
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Definition: ftdi.c:41
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Definition: ftdi.h:241
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Definition: ftdi_i.h:114
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Definition: ftdi.c:256
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Definition: ftdi.c:4265
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Definition: ftdi_i.h:115
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Definition: ftdi.c:310
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Definition: ftdi.h:186
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Definition: ftdi.h:187
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#define MAGIC
Definition: ftdi.c:4413
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int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits, enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity, enum ftdi_break_type break_type)
Definition: ftdi.c:1364
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const char FTDI_VERSION_STRING[]
Definition: ftdi_version_i.h:8
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Definition: ftdi_i.h:46
FTDI_SNAPSHOT_VERSION
const char FTDI_SNAPSHOT_VERSION[]
Definition: ftdi_version_i.h:9
SIO_SET_DTR_LOW
#define SIO_SET_DTR_LOW
Definition: ftdi.h:184
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struct ftdi_eeprom * eeprom
Definition: ftdi.h:265
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Definition: ftdi_i.h:63
ftdi_transfer_control
Definition: ftdi.h:204
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