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Remove compiler warnings on signed comparison
[libftdi] / src / ftdi.c
CommitLineData
a3da1d95
GE		 1/***************************************************************************
2 ftdi.c - description
3 -------------------
4 begin : Fri Apr 4 2003
b25d9165 5 copyright : (C) 2003-2013 by Intra2net AG and the libftdi developers
5fdb1cb1 6 email : opensource@intra2net.com
a3da1d95
GE		 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 ***************************************************************************/
d9f0cce7 16
b5ec1820
TJ		 17/**
18 \mainpage libftdi API documentation
19
ad397a4b 20 Library to talk to FTDI chips. You find the latest versions of libftdi at
1bfc403c 21 http://www.intra2net.com/en/developer/libftdi/
b5ec1820 22
ad397a4b
TJ		 23 The library is easy to use. Have a look at this short example:
24 \include simple.c
25
26 More examples can be found in the "examples" directory.
b5ec1820
TJ		 27*/
28/** \addtogroup libftdi */
29/* @{ */
30
579b006f 31#include <libusb.h>
a8f46ddc 32#include <string.h>
d2f10023 33#include <errno.h>
b56d5a64 34#include <stdio.h>
579b006f 35#include <stdlib.h>
0e302db6 36
b790d38e 37#include "ftdi_i.h"
98452d97 38#include "ftdi.h"
0220adfa 39#include "ftdi_version_i.h"
a3da1d95 40
21abaf2e 41#define ftdi_error_return(code, str) do { \
b0a50459
PS		 42 if ( ftdi ) \
43 ftdi->error_str = str; \
44 else \
45 fprintf(stderr, str); \
21abaf2e 46 return code; \
d2f10023 47 } while(0);
c3d95b87 48
99650502
UB		 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
418aaa72 55
f3f81007
TJ		 56/**
57 Internal function to close usb device pointer.
58 Sets ftdi->usb_dev to NULL.
59 \internal
60
61 \param ftdi pointer to ftdi_context
62
579b006f 63 \retval none
f3f81007 64*/
579b006f 65static void ftdi_usb_close_internal (struct ftdi_context *ftdi)
dff4fdb0 66{
22a1b5c1 67 if (ftdi && ftdi->usb_dev)
dff4fdb0 68 {
56ac0383
TJ		 69 libusb_close (ftdi->usb_dev);
70 ftdi->usb_dev = NULL;
44f41f11
UB		 71 if(ftdi->eeprom)
72 ftdi->eeprom->initialized_for_connected_device = 0;
dff4fdb0 73 }
dff4fdb0 74}
c3d95b87 75
1941414d
TJ		 76/**
77 Initializes a ftdi_context.
4837f98a 78
1941414d 79 \param ftdi pointer to ftdi_context
4837f98a 80
1941414d
TJ		 81 \retval 0: all fine
82 \retval -1: couldn't allocate read buffer
a35aa9bd 83 \retval -2: couldn't allocate struct buffer
3a284749 84 \retval -3: libusb_init() failed
1941414d
TJ		 85
86 \remark This should be called before all functions
948f9ada 87*/
a8f46ddc
TJ		 88int ftdi_init(struct ftdi_context *ftdi)
89{
a35aa9bd 90 struct ftdi_eeprom* eeprom = (struct ftdi_eeprom *)malloc(sizeof(struct ftdi_eeprom));
02212d8e 91 ftdi->usb_ctx = NULL;
98452d97 92 ftdi->usb_dev = NULL;
545820ce
TJ		 93 ftdi->usb_read_timeout = 5000;
94 ftdi->usb_write_timeout = 5000;
a3da1d95 95
53ad271d 96 ftdi->type = TYPE_BM; /* chip type */
a3da1d95 97 ftdi->baudrate = -1;
418aaa72 98 ftdi->bitbang_enabled = 0; /* 0: normal mode 1: any of the bitbang modes enabled */
a3da1d95 99
948f9ada
TJ		 100 ftdi->readbuffer = NULL;
101 ftdi->readbuffer_offset = 0;
102 ftdi->readbuffer_remaining = 0;
103 ftdi->writebuffer_chunksize = 4096;
e2f12a4f 104 ftdi->max_packet_size = 0;
3a284749
TJ		 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");
948f9ada 110
ac0af8ec 111 ftdi_set_interface(ftdi, INTERFACE_ANY);
418aaa72 112 ftdi->bitbang_mode = 1; /* when bitbang is enabled this holds the number of the mode */
53ad271d 113
a35aa9bd
UB		 114 if (eeprom == 0)
115 ftdi_error_return(-2, "Can't malloc struct ftdi_eeprom");
b4d19dea 116 memset(eeprom, 0, sizeof(struct ftdi_eeprom));
a35aa9bd 117 ftdi->eeprom = eeprom;
c201f80f 118
1c733d33
TJ		 119 /* All fine. Now allocate the readbuffer */
120 return ftdi_read_data_set_chunksize(ftdi, 4096);
948f9ada 121}
4837f98a 122
1941414d 123/**
cef378aa
TJ		 124 Allocate and initialize a new ftdi_context
125
126 \return a pointer to a new ftdi_context, or NULL on failure
127*/
672ac008 128struct ftdi_context *ftdi_new(void)
cef378aa
TJ		 129{
130 struct ftdi_context * ftdi = (struct ftdi_context *)malloc(sizeof(struct ftdi_context));
131
22d12cda
TJ		 132 if (ftdi == NULL)
133 {
cef378aa
TJ		 134 return NULL;
135 }
136
22d12cda
TJ		 137 if (ftdi_init(ftdi) != 0)
138 {
cef378aa 139 free(ftdi);
cdf448f6 140 return NULL;
cef378aa
TJ		 141 }
142
143 return ftdi;
144}
145
146/**
1941414d
TJ		 147 Open selected channels on a chip, otherwise use first channel.
148
149 \param ftdi pointer to ftdi_context
f9d69895 150 \param interface Interface to use for FT2232C/2232H/4232H chips.
1941414d
TJ		 151
152 \retval 0: all fine
153 \retval -1: unknown interface
22a1b5c1 154 \retval -2: USB device unavailable
1c5fa36b 155 \retval -3: Device already open, interface can't be set in that state
c4446c36 156*/
0ce2f5fa 157int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface)
c4446c36 158{
1971c26d 159 if (ftdi == NULL)
22a1b5c1
TJ		 160 ftdi_error_return(-2, "USB device unavailable");
161
1c5fa36b
TJ		 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
22d12cda
TJ		 172 switch (interface)
173 {
174 case INTERFACE_ANY:
175 case INTERFACE_A:
ac0af8ec
VY		 176 ftdi->interface = 0;
177 ftdi->index = INTERFACE_A;
178 ftdi->in_ep = 0x02;
179 ftdi->out_ep = 0x81;
22d12cda
TJ		 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;
f9d69895
AH		 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;
22d12cda
TJ		 199 default:
200 ftdi_error_return(-1, "Unknown interface");
c4446c36
TJ		 201 }
202 return 0;
203}
948f9ada 204
1941414d
TJ		 205/**
206 Deinitializes a ftdi_context.
4837f98a 207
1941414d 208 \param ftdi pointer to ftdi_context
4837f98a 209*/
a8f46ddc
TJ		 210void ftdi_deinit(struct ftdi_context *ftdi)
211{
22a1b5c1
TJ		 212 if (ftdi == NULL)
213 return;
214
f3f81007 215 ftdi_usb_close_internal (ftdi);
dff4fdb0 216
22d12cda
TJ		 217 if (ftdi->readbuffer != NULL)
218 {
d9f0cce7
TJ		 219 free(ftdi->readbuffer);
220 ftdi->readbuffer = NULL;
948f9ada 221 }
a35aa9bd
UB		 222
223 if (ftdi->eeprom != NULL)
224 {
74e8e79d
UB		 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 }
a35aa9bd
UB		 240 free(ftdi->eeprom);
241 ftdi->eeprom = NULL;
242 }
3a284749
TJ		 243
244 if (ftdi->usb_ctx)
245 {
246 libusb_exit(ftdi->usb_ctx);
247 ftdi->usb_ctx = NULL;
248 }
a3da1d95
GE		 249}
250
1941414d 251/**
cef378aa
TJ		 252 Deinitialize and free an ftdi_context.
253
254 \param ftdi pointer to ftdi_context
255*/
256void ftdi_free(struct ftdi_context *ftdi)
257{
258 ftdi_deinit(ftdi);
259 free(ftdi);
260}
261
262/**
1941414d
TJ		 263 Use an already open libusb device.
264
265 \param ftdi pointer to ftdi_context
579b006f 266 \param usb libusb libusb_device_handle to use
4837f98a 267*/
579b006f 268void ftdi_set_usbdev (struct ftdi_context *ftdi, libusb_device_handle *usb)
a8f46ddc 269{
22a1b5c1
TJ		 270 if (ftdi == NULL)
271 return;
272
98452d97
TJ		 273 ftdi->usb_dev = usb;
274}
275
0220adfa
TJ		 276/**
277 * @brief Get libftdi library version
278 *
279 * @return ftdi_version_info Library version information
280 **/
281struct ftdi_version_info ftdi_get_library_version()
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}
98452d97 293
1941414d 294/**
7879216a
UB		 295 Finds all ftdi devices with given VID:PID on the usb bus. Creates a new
296 ftdi_device_list which needs to be deallocated by ftdi_list_free() after
297 use. With VID:PID 0:0, search for the default devices
298 (0x403:0x6001, 0x403:0x6010, 0x403:0x6011, 0x403:0x6014)
1941414d
TJ		 299
300 \param ftdi pointer to ftdi_context
301 \param devlist Pointer where to store list of found devices
302 \param vendor Vendor ID to search for
303 \param product Product ID to search for
edb82cbf 304
1941414d 305 \retval >0: number of devices found
1941414d 306 \retval -3: out of memory
579b006f
JZ		 307 \retval -5: libusb_get_device_list() failed
308 \retval -6: libusb_get_device_descriptor() failed
edb82cbf 309*/
d2f10023 310int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product)
edb82cbf
TJ		 311{
312 struct ftdi_device_list **curdev;
579b006f
JZ		 313 libusb_device *dev;
314 libusb_device **devs;
edb82cbf 315 int count = 0;
579b006f
JZ		 316 int i = 0;
317
02212d8e 318 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
579b006f 319 ftdi_error_return(-5, "libusb_get_device_list() failed");
edb82cbf
TJ		 320
321 curdev = devlist;
6db32169 322 *curdev = NULL;
579b006f
JZ		 323
324 while ((dev = devs[i++]) != NULL)
22d12cda 325 {
579b006f 326 struct libusb_device_descriptor desc;
d2f10023 327
579b006f 328 if (libusb_get_device_descriptor(dev, &desc) < 0)
77377af7 329 ftdi_error_return_free_device_list(-6, "libusb_get_device_descriptor() failed", devs);
edb82cbf 330
56631bed
UB		 331 if (((vendor != 0 && product != 0) &&
332 desc.idVendor == vendor && desc.idProduct == product) ||
333 ((vendor == 0 && product == 0) &&
334 (desc.idVendor == 0x403) && (desc.idProduct == 0x6001 || desc.idProduct == 0x6010
7879216a 335 || desc.idProduct == 0x6011 || desc.idProduct == 0x6014)))
579b006f
JZ		 336 {
337 *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
338 if (!*curdev)
77377af7 339 ftdi_error_return_free_device_list(-3, "out of memory", devs);
56ac0383 340
579b006f
JZ		 341 (*curdev)->next = NULL;
342 (*curdev)->dev = dev;
0c33162c 343 libusb_ref_device(dev);
579b006f
JZ		 344 curdev = &(*curdev)->next;
345 count++;
edb82cbf
TJ		 346 }
347 }
77377af7 348 libusb_free_device_list(devs,1);
edb82cbf
TJ		 349 return count;
350}
351
1941414d
TJ		 352/**
353 Frees a usb device list.
edb82cbf 354
1941414d 355 \param devlist USB device list created by ftdi_usb_find_all()
edb82cbf 356*/
d2f10023 357void ftdi_list_free(struct ftdi_device_list **devlist)
edb82cbf 358{
6db32169
TJ		 359 struct ftdi_device_list *curdev, *next;
360
22d12cda
TJ		 361 for (curdev = *devlist; curdev != NULL;)
362 {
6db32169 363 next = curdev->next;
0c33162c 364 libusb_unref_device(curdev->dev);
6db32169
TJ		 365 free(curdev);
366 curdev = next;
edb82cbf
TJ		 367 }
368
6db32169 369 *devlist = NULL;
edb82cbf
TJ		 370}
371
1941414d 372/**
cef378aa
TJ		 373 Frees a usb device list.
374
375 \param devlist USB device list created by ftdi_usb_find_all()
376*/
377void ftdi_list_free2(struct ftdi_device_list *devlist)
378{
379 ftdi_list_free(&devlist);
380}
381
382/**
474786c0
TJ		 383 Return device ID strings from the usb device.
384
385 The parameters manufacturer, description and serial may be NULL
386 or pointer to buffers to store the fetched strings.
387
898c34dd
TJ		 388 \note Use this function only in combination with ftdi_usb_find_all()
389 as it closes the internal "usb_dev" after use.
390
474786c0
TJ		 391 \param ftdi pointer to ftdi_context
392 \param dev libusb usb_dev to use
393 \param manufacturer Store manufacturer string here if not NULL
394 \param mnf_len Buffer size of manufacturer string
395 \param description Store product description string here if not NULL
396 \param desc_len Buffer size of product description string
397 \param serial Store serial string here if not NULL
398 \param serial_len Buffer size of serial string
399
400 \retval 0: all fine
401 \retval -1: wrong arguments
402 \retval -4: unable to open device
403 \retval -7: get product manufacturer failed
404 \retval -8: get product description failed
405 \retval -9: get serial number failed
579b006f 406 \retval -11: libusb_get_device_descriptor() failed
474786c0 407*/
579b006f 408int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct libusb_device * dev,
22d12cda 409 char * manufacturer, int mnf_len, char * description, int desc_len, char * serial, int serial_len)
474786c0 410{
579b006f
JZ		 411 struct libusb_device_descriptor desc;
412
474786c0
TJ		 413 if ((ftdi==NULL) || (dev==NULL))
414 return -1;
415
579b006f
JZ		 416 if (libusb_open(dev, &ftdi->usb_dev) < 0)
417 ftdi_error_return(-4, "libusb_open() failed");
418
419 if (libusb_get_device_descriptor(dev, &desc) < 0)
420 ftdi_error_return(-11, "libusb_get_device_descriptor() failed");
474786c0 421
22d12cda
TJ		 422 if (manufacturer != NULL)
423 {
579b006f 424 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iManufacturer, (unsigned char *)manufacturer, mnf_len) < 0)
22d12cda 425 {
f3f81007 426 ftdi_usb_close_internal (ftdi);
579b006f 427 ftdi_error_return(-7, "libusb_get_string_descriptor_ascii() failed");
474786c0
TJ		 428 }
429 }
430
22d12cda
TJ		 431 if (description != NULL)
432 {
579b006f 433 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)description, desc_len) < 0)
22d12cda 434 {
f3f81007 435 ftdi_usb_close_internal (ftdi);
579b006f 436 ftdi_error_return(-8, "libusb_get_string_descriptor_ascii() failed");
474786c0
TJ		 437 }
438 }
439
22d12cda
TJ		 440 if (serial != NULL)
441 {
579b006f 442 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)serial, serial_len) < 0)
22d12cda 443 {
f3f81007 444 ftdi_usb_close_internal (ftdi);
579b006f 445 ftdi_error_return(-9, "libusb_get_string_descriptor_ascii() failed");
474786c0
TJ		 446 }
447 }
448
579b006f 449 ftdi_usb_close_internal (ftdi);
474786c0
TJ		 450
451 return 0;
452}
453
454/**
e2f12a4f
TJ		 455 * Internal function to determine the maximum packet size.
456 * \param ftdi pointer to ftdi_context
457 * \param dev libusb usb_dev to use
458 * \retval Maximum packet size for this device
459 */
579b006f 460static unsigned int _ftdi_determine_max_packet_size(struct ftdi_context *ftdi, libusb_device *dev)
e2f12a4f 461{
579b006f
JZ		 462 struct libusb_device_descriptor desc;
463 struct libusb_config_descriptor *config0;
e2f12a4f
TJ		 464 unsigned int packet_size;
465
22a1b5c1
TJ		 466 // Sanity check
467 if (ftdi == NULL || dev == NULL)
468 return 64;
469
e2f12a4f
TJ		 470 // Determine maximum packet size. Init with default value.
471 // New hi-speed devices from FTDI use a packet size of 512 bytes
472 // but could be connected to a normal speed USB hub -> 64 bytes packet size.
c7e4c09e 473 if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H )
e2f12a4f
TJ		 474 packet_size = 512;
475 else
476 packet_size = 64;
477
579b006f
JZ		 478 if (libusb_get_device_descriptor(dev, &desc) < 0)
479 return packet_size;
480
481 if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
482 return packet_size;
e2f12a4f 483
579b006f
JZ		 484 if (desc.bNumConfigurations > 0)
485 {
486 if (ftdi->interface < config0->bNumInterfaces)
e2f12a4f 487 {
579b006f 488 struct libusb_interface interface = config0->interface[ftdi->interface];
e2f12a4f
TJ		 489 if (interface.num_altsetting > 0)
490 {
579b006f 491 struct libusb_interface_descriptor descriptor = interface.altsetting[0];
e2f12a4f
TJ		 492 if (descriptor.bNumEndpoints > 0)
493 {
494 packet_size = descriptor.endpoint[0].wMaxPacketSize;
495 }
496 }
497 }
498 }
499
579b006f 500 libusb_free_config_descriptor (config0);
e2f12a4f
TJ		 501 return packet_size;
502}
503
504/**
418aaa72 505 Opens a ftdi device given by an usb_device.
7b18bef6 506
1941414d
TJ		 507 \param ftdi pointer to ftdi_context
508 \param dev libusb usb_dev to use
509
510 \retval 0: all fine
23b1798d 511 \retval -3: unable to config device
1941414d
TJ		 512 \retval -4: unable to open device
513 \retval -5: unable to claim device
514 \retval -6: reset failed
515 \retval -7: set baudrate failed
22a1b5c1 516 \retval -8: ftdi context invalid
579b006f
JZ		 517 \retval -9: libusb_get_device_descriptor() failed
518 \retval -10: libusb_get_config_descriptor() failed
e375e6cb 519 \retval -11: libusb_detach_kernel_driver() failed
579b006f 520 \retval -12: libusb_get_configuration() failed
7b18bef6 521*/
579b006f 522int ftdi_usb_open_dev(struct ftdi_context *ftdi, libusb_device *dev)
7b18bef6 523{
579b006f
JZ		 524 struct libusb_device_descriptor desc;
525 struct libusb_config_descriptor *config0;
43aee24f 526 int cfg, cfg0, detach_errno = 0;
579b006f 527
22a1b5c1
TJ		 528 if (ftdi == NULL)
529 ftdi_error_return(-8, "ftdi context invalid");
530
579b006f
JZ		 531 if (libusb_open(dev, &ftdi->usb_dev) < 0)
532 ftdi_error_return(-4, "libusb_open() failed");
533
534 if (libusb_get_device_descriptor(dev, &desc) < 0)
535 ftdi_error_return(-9, "libusb_get_device_descriptor() failed");
536
537 if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
538 ftdi_error_return(-10, "libusb_get_config_descriptor() failed");
539 cfg0 = config0->bConfigurationValue;
540 libusb_free_config_descriptor (config0);
d2f10023 541
22592e17 542 // Try to detach ftdi_sio kernel module.
22592e17
TJ		 543 //
544 // The return code is kept in a separate variable and only parsed
545 // if usb_set_configuration() or usb_claim_interface() fails as the
546 // detach operation might be denied and everything still works fine.
547 // Likely scenario is a static ftdi_sio kernel module.
a3d86bdb
TJ		 548 if (ftdi->module_detach_mode == AUTO_DETACH_SIO_MODULE)
549 {
550 if (libusb_detach_kernel_driver(ftdi->usb_dev, ftdi->interface) !=0)
551 detach_errno = errno;
552 }
d2f10023 553
579b006f
JZ		 554 if (libusb_get_configuration (ftdi->usb_dev, &cfg) < 0)
555 ftdi_error_return(-12, "libusb_get_configuration () failed");
b57aedfd
GE		 556 // set configuration (needed especially for windows)
557 // tolerate EBUSY: one device with one configuration, but two interfaces
558 // and libftdi sessions to both interfaces (e.g. FT2232)
579b006f 559 if (desc.bNumConfigurations > 0 && cfg != cfg0)
b57aedfd 560 {
579b006f 561 if (libusb_set_configuration(ftdi->usb_dev, cfg0) < 0)
22d12cda 562 {
a56ba2bd 563 ftdi_usb_close_internal (ftdi);
56ac0383 564 if (detach_errno == EPERM)
43aee24f
UB		 565 {
566 ftdi_error_return(-8, "inappropriate permissions on device!");
567 }
568 else
569 {
c16b162d 570 ftdi_error_return(-3, "unable to set usb configuration. Make sure the default FTDI driver is not in use");
43aee24f 571 }
23b1798d
TJ		 572 }
573 }
574
579b006f 575 if (libusb_claim_interface(ftdi->usb_dev, ftdi->interface) < 0)
22d12cda 576 {
f3f81007 577 ftdi_usb_close_internal (ftdi);
56ac0383 578 if (detach_errno == EPERM)
43aee24f
UB		 579 {
580 ftdi_error_return(-8, "inappropriate permissions on device!");
581 }
582 else
583 {
c16b162d 584 ftdi_error_return(-5, "unable to claim usb device. Make sure the default FTDI driver is not in use");
43aee24f 585 }
7b18bef6
TJ		 586 }
587
22d12cda
TJ		 588 if (ftdi_usb_reset (ftdi) != 0)
589 {
f3f81007 590 ftdi_usb_close_internal (ftdi);
7b18bef6
TJ		 591 ftdi_error_return(-6, "ftdi_usb_reset failed");
592 }
593
7b18bef6
TJ		 594 // Try to guess chip type
595 // Bug in the BM type chips: bcdDevice is 0x200 for serial == 0
579b006f 596 if (desc.bcdDevice == 0x400 || (desc.bcdDevice == 0x200
56ac0383 597 && desc.iSerialNumber == 0))
7b18bef6 598 ftdi->type = TYPE_BM;
579b006f 599 else if (desc.bcdDevice == 0x200)
7b18bef6 600 ftdi->type = TYPE_AM;
579b006f 601 else if (desc.bcdDevice == 0x500)
7b18bef6 602 ftdi->type = TYPE_2232C;
579b006f 603 else if (desc.bcdDevice == 0x600)
cb6250fa 604 ftdi->type = TYPE_R;
579b006f 605 else if (desc.bcdDevice == 0x700)
0beb9686 606 ftdi->type = TYPE_2232H;
579b006f 607 else if (desc.bcdDevice == 0x800)
0beb9686 608 ftdi->type = TYPE_4232H;
c7e4c09e
UB		 609 else if (desc.bcdDevice == 0x900)
610 ftdi->type = TYPE_232H;
7b18bef6 611
e2f12a4f
TJ		 612 // Determine maximum packet size
613 ftdi->max_packet_size = _ftdi_determine_max_packet_size(ftdi, dev);
614
ef6f4838
TE		 615 if (ftdi_set_baudrate (ftdi, 9600) != 0)
616 {
617 ftdi_usb_close_internal (ftdi);
618 ftdi_error_return(-7, "set baudrate failed");
619 }
620
7b18bef6
TJ		 621 ftdi_error_return(0, "all fine");
622}
623
1941414d
TJ		 624/**
625 Opens the first device with a given vendor and product ids.
626
627 \param ftdi pointer to ftdi_context
628 \param vendor Vendor ID
629 \param product Product ID
630
9bec2387 631 \retval same as ftdi_usb_open_desc()
1941414d 632*/
edb82cbf
TJ		 633int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
634{
635 return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
636}
637
1941414d
TJ		 638/**
639 Opens the first device with a given, vendor id, product id,
640 description and serial.
641
642 \param ftdi pointer to ftdi_context
643 \param vendor Vendor ID
644 \param product Product ID
645 \param description Description to search for. Use NULL if not needed.
646 \param serial Serial to search for. Use NULL if not needed.
647
648 \retval 0: all fine
1941414d
TJ		 649 \retval -3: usb device not found
650 \retval -4: unable to open device
651 \retval -5: unable to claim device
652 \retval -6: reset failed
653 \retval -7: set baudrate failed
654 \retval -8: get product description failed
655 \retval -9: get serial number failed
579b006f
JZ		 656 \retval -12: libusb_get_device_list() failed
657 \retval -13: libusb_get_device_descriptor() failed
a3da1d95 658*/
04e1ea0a 659int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
a8f46ddc
TJ		 660 const char* description, const char* serial)
661{
5ebbdab9
GE		 662 return ftdi_usb_open_desc_index(ftdi,vendor,product,description,serial,0);
663}
664
665/**
666 Opens the index-th device with a given, vendor id, product id,
667 description and serial.
668
669 \param ftdi pointer to ftdi_context
670 \param vendor Vendor ID
671 \param product Product ID
672 \param description Description to search for. Use NULL if not needed.
673 \param serial Serial to search for. Use NULL if not needed.
674 \param index Number of matching device to open if there are more than one, starts with 0.
675
676 \retval 0: all fine
677 \retval -1: usb_find_busses() failed
678 \retval -2: usb_find_devices() failed
679 \retval -3: usb device not found
680 \retval -4: unable to open device
681 \retval -5: unable to claim device
682 \retval -6: reset failed
683 \retval -7: set baudrate failed
684 \retval -8: get product description failed
685 \retval -9: get serial number failed
686 \retval -10: unable to close device
22a1b5c1 687 \retval -11: ftdi context invalid
5ebbdab9
GE		 688*/
689int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int vendor, int product,
56ac0383 690 const char* description, const char* serial, unsigned int index)
5ebbdab9 691{
579b006f
JZ		 692 libusb_device *dev;
693 libusb_device **devs;
c3d95b87 694 char string[256];
579b006f 695 int i = 0;
98452d97 696
22a1b5c1
TJ		 697 if (ftdi == NULL)
698 ftdi_error_return(-11, "ftdi context invalid");
699
02212d8e 700 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
99650502
UB		 701 ftdi_error_return(-12, "libusb_get_device_list() failed");
702
579b006f 703 while ((dev = devs[i++]) != NULL)
22d12cda 704 {
579b006f 705 struct libusb_device_descriptor desc;
99650502 706 int res;
579b006f
JZ		 707
708 if (libusb_get_device_descriptor(dev, &desc) < 0)
99650502 709 ftdi_error_return_free_device_list(-13, "libusb_get_device_descriptor() failed", devs);
579b006f
JZ		 710
711 if (desc.idVendor == vendor && desc.idProduct == product)
22d12cda 712 {
579b006f 713 if (libusb_open(dev, &ftdi->usb_dev) < 0)
99650502 714 ftdi_error_return_free_device_list(-4, "usb_open() failed", devs);
c3d95b87 715
579b006f
JZ		 716 if (description != NULL)
717 {
718 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)string, sizeof(string)) < 0)
22d12cda 719 {
d4afae5f 720 ftdi_usb_close_internal (ftdi);
99650502 721 ftdi_error_return_free_device_list(-8, "unable to fetch product description", devs);
a8f46ddc 722 }
579b006f 723 if (strncmp(string, description, sizeof(string)) != 0)
22d12cda 724 {
d4afae5f 725 ftdi_usb_close_internal (ftdi);
579b006f 726 continue;
a8f46ddc 727 }
579b006f
JZ		 728 }
729 if (serial != NULL)
730 {
731 if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)string, sizeof(string)) < 0)
732 {
733 ftdi_usb_close_internal (ftdi);
99650502 734 ftdi_error_return_free_device_list(-9, "unable to fetch serial number", devs);
579b006f
JZ		 735 }
736 if (strncmp(string, serial, sizeof(string)) != 0)
737 {
738 ftdi_usb_close_internal (ftdi);
739 continue;
740 }
741 }
98452d97 742
579b006f 743 ftdi_usb_close_internal (ftdi);
d2f10023 744
56ac0383
TJ		 745 if (index > 0)
746 {
747 index--;
748 continue;
749 }
5ebbdab9 750
99650502
UB		 751 res = ftdi_usb_open_dev(ftdi, dev);
752 libusb_free_device_list(devs,1);
753 return res;
98452d97 754 }
98452d97 755 }
a3da1d95 756
98452d97 757 // device not found
99650502 758 ftdi_error_return_free_device_list(-3, "device not found", devs);
a3da1d95
GE		 759}
760
1941414d 761/**
5ebbdab9
GE		 762 Opens the ftdi-device described by a description-string.
763 Intended to be used for parsing a device-description given as commandline argument.
764
765 \param ftdi pointer to ftdi_context
766 \param description NULL-terminated description-string, using this format:
767 \li <tt>d:\<devicenode></tt> path of bus and device-node (e.g. "003/001") within usb device tree (usually at /proc/bus/usb/)
768 \li <tt>i:\<vendor>:\<product></tt> first device with given vendor and product id, ids can be decimal, octal (preceded by "0") or hex (preceded by "0x")
769 \li <tt>i:\<vendor>:\<product>:\<index></tt> as above with index being the number of the device (starting with 0) if there are more than one
770 \li <tt>s:\<vendor>:\<product>:\<serial></tt> first device with given vendor id, product id and serial string
771
772 \note The description format may be extended in later versions.
773
774 \retval 0: all fine
579b006f 775 \retval -2: libusb_get_device_list() failed
5ebbdab9
GE		 776 \retval -3: usb device not found
777 \retval -4: unable to open device
778 \retval -5: unable to claim device
779 \retval -6: reset failed
780 \retval -7: set baudrate failed
781 \retval -8: get product description failed
782 \retval -9: get serial number failed
783 \retval -10: unable to close device
784 \retval -11: illegal description format
22a1b5c1 785 \retval -12: ftdi context invalid
5ebbdab9
GE		 786*/
787int ftdi_usb_open_string(struct ftdi_context *ftdi, const char* description)
788{
22a1b5c1
TJ		 789 if (ftdi == NULL)
790 ftdi_error_return(-12, "ftdi context invalid");
791
5ebbdab9
GE		 792 if (description[0] == 0 || description[1] != ':')
793 ftdi_error_return(-11, "illegal description format");
794
795 if (description[0] == 'd')
796 {
579b006f
JZ		 797 libusb_device *dev;
798 libusb_device **devs;
56ac0383
TJ		 799 unsigned int bus_number, device_address;
800 int i = 0;
579b006f 801
56ac0383
TJ		 802 if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
803 ftdi_error_return(-2, "libusb_get_device_list() failed");
5ebbdab9 804
579b006f
JZ		 805 /* XXX: This doesn't handle symlinks/odd paths/etc... */
806 if (sscanf (description + 2, "%u/%u", &bus_number, &device_address) != 2)
56ac0383 807 ftdi_error_return_free_device_list(-11, "illegal description format", devs);
5ebbdab9 808
56ac0383 809 while ((dev = devs[i++]) != NULL)
5ebbdab9 810 {
99650502 811 int ret;
56ac0383
TJ		 812 if (bus_number == libusb_get_bus_number (dev)
813 && device_address == libusb_get_device_address (dev))
99650502
UB		 814 {
815 ret = ftdi_usb_open_dev(ftdi, dev);
816 libusb_free_device_list(devs,1);
817 return ret;
818 }
5ebbdab9
GE		 819 }
820
821 // device not found
99650502 822 ftdi_error_return_free_device_list(-3, "device not found", devs);
5ebbdab9
GE		 823 }
824 else if (description[0] == 'i' || description[0] == 's')
825 {
826 unsigned int vendor;
827 unsigned int product;
828 unsigned int index=0;
0e6cf62b 829 const char *serial=NULL;
5ebbdab9
GE		 830 const char *startp, *endp;
831
832 errno=0;
833 startp=description+2;
834 vendor=strtoul((char*)startp,(char**)&endp,0);
835 if (*endp != ':' || endp == startp || errno != 0)
836 ftdi_error_return(-11, "illegal description format");
837
838 startp=endp+1;
839 product=strtoul((char*)startp,(char**)&endp,0);
840 if (endp == startp || errno != 0)
841 ftdi_error_return(-11, "illegal description format");
842
843 if (description[0] == 'i' && *endp != 0)
844 {
845 /* optional index field in i-mode */
846 if (*endp != ':')
847 ftdi_error_return(-11, "illegal description format");
848
849 startp=endp+1;
850 index=strtoul((char*)startp,(char**)&endp,0);
851 if (*endp != 0 || endp == startp || errno != 0)
852 ftdi_error_return(-11, "illegal description format");
853 }
854 if (description[0] == 's')
855 {
856 if (*endp != ':')
857 ftdi_error_return(-11, "illegal description format");
858
859 /* rest of the description is the serial */
860 serial=endp+1;
861 }
862
863 return ftdi_usb_open_desc_index(ftdi, vendor, product, NULL, serial, index);
864 }
865 else
866 {
867 ftdi_error_return(-11, "illegal description format");
868 }
869}
870
871/**
1941414d 872 Resets the ftdi device.
a3da1d95 873
1941414d
TJ		 874 \param ftdi pointer to ftdi_context
875
876 \retval 0: all fine
877 \retval -1: FTDI reset failed
22a1b5c1 878 \retval -2: USB device unavailable
4837f98a 879*/
edb82cbf 880int ftdi_usb_reset(struct ftdi_context *ftdi)
a8f46ddc 881{
22a1b5c1
TJ		 882 if (ftdi == NULL || ftdi->usb_dev == NULL)
883 ftdi_error_return(-2, "USB device unavailable");
884
579b006f
JZ		 885 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
886 SIO_RESET_REQUEST, SIO_RESET_SIO,
887 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
22d12cda 888 ftdi_error_return(-1,"FTDI reset failed");
c3d95b87 889
545820ce 890 // Invalidate data in the readbuffer
bfcee05b
TJ		 891 ftdi->readbuffer_offset = 0;
892 ftdi->readbuffer_remaining = 0;
893
a3da1d95
GE		 894 return 0;
895}
896
1941414d 897/**
1189b11a 898 Clears the read buffer on the chip and the internal read buffer.
1941414d
TJ		 899
900 \param ftdi pointer to ftdi_context
4837f98a 901
1941414d 902 \retval 0: all fine
1189b11a 903 \retval -1: read buffer purge failed
22a1b5c1 904 \retval -2: USB device unavailable
4837f98a 905*/
1189b11a 906int ftdi_usb_purge_rx_buffer(struct ftdi_context *ftdi)
a8f46ddc 907{
22a1b5c1
TJ		 908 if (ftdi == NULL || ftdi->usb_dev == NULL)
909 ftdi_error_return(-2, "USB device unavailable");
910
579b006f
JZ		 911 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
912 SIO_RESET_REQUEST, SIO_RESET_PURGE_RX,
913 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
c3d95b87
TJ		 914 ftdi_error_return(-1, "FTDI purge of RX buffer failed");
915
545820ce 916 // Invalidate data in the readbuffer
bfcee05b
TJ		 917 ftdi->readbuffer_offset = 0;
918 ftdi->readbuffer_remaining = 0;
a60be878 919
1189b11a
TJ		 920 return 0;
921}
922
923/**
924 Clears the write buffer on the chip.
925
926 \param ftdi pointer to ftdi_context
927
928 \retval 0: all fine
929 \retval -1: write buffer purge failed
22a1b5c1 930 \retval -2: USB device unavailable
1189b11a
TJ		 931*/
932int ftdi_usb_purge_tx_buffer(struct ftdi_context *ftdi)
933{
22a1b5c1
TJ		 934 if (ftdi == NULL || ftdi->usb_dev == NULL)
935 ftdi_error_return(-2, "USB device unavailable");
936
579b006f
JZ		 937 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
938 SIO_RESET_REQUEST, SIO_RESET_PURGE_TX,
939 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
1189b11a
TJ		 940 ftdi_error_return(-1, "FTDI purge of TX buffer failed");
941
942 return 0;
943}
944
945/**
946 Clears the buffers on the chip and the internal read buffer.
947
948 \param ftdi pointer to ftdi_context
949
950 \retval 0: all fine
951 \retval -1: read buffer purge failed
952 \retval -2: write buffer purge failed
22a1b5c1 953 \retval -3: USB device unavailable
1189b11a
TJ		 954*/
955int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
956{
957 int result;
958
22a1b5c1
TJ		 959 if (ftdi == NULL || ftdi->usb_dev == NULL)
960 ftdi_error_return(-3, "USB device unavailable");
961
1189b11a 962 result = ftdi_usb_purge_rx_buffer(ftdi);
5a2b51cb 963 if (result < 0)
1189b11a
TJ		 964 return -1;
965
966 result = ftdi_usb_purge_tx_buffer(ftdi);
5a2b51cb 967 if (result < 0)
1189b11a 968 return -2;
545820ce 969
a60be878
TJ		 970 return 0;
971}
a3da1d95 972
f3f81007
TJ		 973
974
1941414d
TJ		 975/**
976 Closes the ftdi device. Call ftdi_deinit() if you're cleaning up.
977
978 \param ftdi pointer to ftdi_context
979
980 \retval 0: all fine
981 \retval -1: usb_release failed
22a1b5c1 982 \retval -3: ftdi context invalid
a3da1d95 983*/
a8f46ddc
TJ		 984int ftdi_usb_close(struct ftdi_context *ftdi)
985{
a3da1d95
GE		 986 int rtn = 0;
987
22a1b5c1
TJ		 988 if (ftdi == NULL)
989 ftdi_error_return(-3, "ftdi context invalid");
990
dff4fdb0 991 if (ftdi->usb_dev != NULL)
579b006f 992 if (libusb_release_interface(ftdi->usb_dev, ftdi->interface) < 0)
dff4fdb0 993 rtn = -1;
98452d97 994
579b006f 995 ftdi_usb_close_internal (ftdi);
98452d97 996
a3da1d95
GE		 997 return rtn;
998}
999
f15786e4
UB		 1000/* ftdi_to_clkbits_AM For the AM device, convert a requested baudrate
1001 to encoded divisor and the achievable baudrate
53ad271d 1002 Function is only used internally
b5ec1820 1003 \internal
f15786e4
UB		 1004
1005 See AN120
1006 clk/1 -> 0
1007 clk/1.5 -> 1
1008 clk/2 -> 2
1009 From /2, 0.125/ 0.25 and 0.5 steps may be taken
1010 The fractional part has frac_code encoding
53ad271d 1011*/
f15786e4
UB		 1012static int ftdi_to_clkbits_AM(int baudrate, unsigned long *encoded_divisor)
1013
a8f46ddc 1014{
f15786e4 1015 static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
53ad271d
TJ		 1016 static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
1017 static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
53ad271d 1018 int divisor, best_divisor, best_baud, best_baud_diff;
53ad271d 1019 divisor = 24000000 / baudrate;
f15786e4 1020 int i;
53ad271d 1021
f15786e4
UB		 1022 // Round down to supported fraction (AM only)
1023 divisor -= am_adjust_dn[divisor & 7];
53ad271d
TJ		 1024
1025 // Try this divisor and the one above it (because division rounds down)
1026 best_divisor = 0;
1027 best_baud = 0;
1028 best_baud_diff = 0;
22d12cda
TJ		 1029 for (i = 0; i < 2; i++)
1030 {
53ad271d
TJ		 1031 int try_divisor = divisor + i;
1032 int baud_estimate;
1033 int baud_diff;
1034
1035 // Round up to supported divisor value
22d12cda
TJ		 1036 if (try_divisor <= 8)
1037 {
53ad271d
TJ		 1038 // Round up to minimum supported divisor
1039 try_divisor = 8;
22d12cda 1040 }
22d12cda
TJ		 1041 else if (divisor < 16)
1042 {
53ad271d
TJ		 1043 // AM doesn't support divisors 9 through 15 inclusive
1044 try_divisor = 16;
22d12cda
TJ		 1045 }
1046 else
1047 {
f15786e4
UB		 1048 // Round up to supported fraction (AM only)
1049 try_divisor += am_adjust_up[try_divisor & 7];
1050 if (try_divisor > 0x1FFF8)
22d12cda 1051 {
f15786e4
UB		 1052 // Round down to maximum supported divisor value (for AM)
1053 try_divisor = 0x1FFF8;
53ad271d
TJ		 1054 }
1055 }
1056 // Get estimated baud rate (to nearest integer)
1057 baud_estimate = (24000000 + (try_divisor / 2)) / try_divisor;
1058 // Get absolute difference from requested baud rate
22d12cda
TJ		 1059 if (baud_estimate < baudrate)
1060 {
53ad271d 1061 baud_diff = baudrate - baud_estimate;
22d12cda
TJ		 1062 }
1063 else
1064 {
53ad271d
TJ		 1065 baud_diff = baud_estimate - baudrate;
1066 }
22d12cda
TJ		 1067 if (i == 0 || baud_diff < best_baud_diff)
1068 {
53ad271d
TJ		 1069 // Closest to requested baud rate so far
1070 best_divisor = try_divisor;
1071 best_baud = baud_estimate;
1072 best_baud_diff = baud_diff;
22d12cda
TJ		 1073 if (baud_diff == 0)
1074 {
53ad271d
TJ		 1075 // Spot on! No point trying
1076 break;
1077 }
1078 }
1079 }
1080 // Encode the best divisor value
f15786e4 1081 *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 7] << 14);
53ad271d 1082 // Deal with special cases for encoded value
f15786e4 1083 if (*encoded_divisor == 1)
22d12cda 1084 {
f15786e4 1085 *encoded_divisor = 0; // 3000000 baud
22d12cda 1086 }
f15786e4
UB		 1087 else if (*encoded_divisor == 0x4001)
1088 {
1089 *encoded_divisor = 1; // 2000000 baud (BM only)
1090 }
1091 return best_baud;
1092}
1093
1094/* ftdi_to_clkbits Convert a requested baudrate for a given system clock and predivisor
1095 to encoded divisor and the achievable baudrate
1096 Function is only used internally
1097 \internal
1098
1099 See AN120
1100 clk/1 -> 0
1101 clk/1.5 -> 1
1102 clk/2 -> 2
1103 From /2, 0.125 steps may be taken.
1104 The fractional part has frac_code encoding
9956d428
UB		 1105
1106 value[13:0] of value is the divisor
1107 index[9] mean 12 MHz Base(120 MHz/10) rate versus 3 MHz (48 MHz/16) else
1108
1109 H Type have all features above with
1110 {index[8],value[15:14]} is the encoded subdivisor
1111
1112 FT232R, FT2232 and FT232BM have no option for 12 MHz and with
1113 {index[0],value[15:14]} is the encoded subdivisor
1114
1115 AM Type chips have only four fractional subdivisors at value[15:14]
1116 for subdivisors 0, 0.5, 0.25, 0.125
f15786e4
UB		 1117*/
1118static int ftdi_to_clkbits(int baudrate, unsigned int clk, int clk_div, unsigned long *encoded_divisor)
1119{
1120 static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
1121 int best_baud = 0;
1122 int divisor, best_divisor;
1123 if (baudrate >= clk/clk_div)
1124 {
1125 *encoded_divisor = 0;
1126 best_baud = clk/clk_div;
1127 }
1128 else if (baudrate >= clk/(clk_div + clk_div/2))
1129 {
1130 *encoded_divisor = 1;
1131 best_baud = clk/(clk_div + clk_div/2);
1132 }
1133 else if (baudrate >= clk/(2*clk_div))
1134 {
1135 *encoded_divisor = 2;
1136 best_baud = clk/(2*clk_div);
1137 }
1138 else
1139 {
1140 /* We divide by 16 to have 3 fractional bits and one bit for rounding */
1141 divisor = clk*16/clk_div / baudrate;
1142 if (divisor & 1) /* Decide if to round up or down*/
1143 best_divisor = divisor /2 +1;
1144 else
1145 best_divisor = divisor/2;
1146 if(best_divisor > 0x20000)
1147 best_divisor = 0x1ffff;
aae08071
UB		 1148 best_baud = clk*16/clk_div/best_divisor;
1149 if (best_baud & 1) /* Decide if to round up or down*/
1150 best_baud = best_baud /2 +1;
1151 else
1152 best_baud = best_baud /2;
f15786e4
UB		 1153 *encoded_divisor = (best_divisor >> 3) | (frac_code[best_divisor & 0x7] << 14);
1154 }
1155 return best_baud;
1156}
1157/**
1158 ftdi_convert_baudrate returns nearest supported baud rate to that requested.
1159 Function is only used internally
1160 \internal
1161*/
1162static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
1163 unsigned short *value, unsigned short *index)
1164{
1165 int best_baud;
1166 unsigned long encoded_divisor;
1167
1168 if (baudrate <= 0)
1169 {
1170 // Return error
1171 return -1;
1172 }
1173
1174#define H_CLK 120000000
1175#define C_CLK 48000000
1176 if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H) || (ftdi->type == TYPE_232H ))
1177 {
1178 if(baudrate*10 > H_CLK /0x3fff)
1179 {
1180 /* On H Devices, use 12 000 000 Baudrate when possible
1181 We have a 14 bit divisor, a 1 bit divisor switch (10 or 16)
1182 three fractional bits and a 120 MHz clock
1183 Assume AN_120 "Sub-integer divisors between 0 and 2 are not allowed" holds for
1184 DIV/10 CLK too, so /1, /1.5 and /2 can be handled the same*/
1185 best_baud = ftdi_to_clkbits(baudrate, H_CLK, 10, &encoded_divisor);
1186 encoded_divisor |= 0x20000; /* switch on CLK/10*/
1187 }
1188 else
1189 best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1190 }
1191 else if ((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C) || (ftdi->type == TYPE_R ))
1192 {
1193 best_baud = ftdi_to_clkbits(baudrate, C_CLK, 16, &encoded_divisor);
1194 }
1195 else
22d12cda 1196 {
f15786e4 1197 best_baud = ftdi_to_clkbits_AM(baudrate, &encoded_divisor);
53ad271d
TJ		 1198 }
1199 // Split into "value" and "index" values
1200 *value = (unsigned short)(encoded_divisor & 0xFFFF);
e03f60a1 1201 if (ftdi->type == TYPE_2232H ||
f15786e4 1202 ftdi->type == TYPE_4232H || ftdi->type == TYPE_232H )
22d12cda 1203 {
0126d22e
TJ		 1204 *index = (unsigned short)(encoded_divisor >> 8);
1205 *index &= 0xFF00;
a9c57c05 1206 *index |= ftdi->index;
0126d22e
TJ		 1207 }
1208 else
1209 *index = (unsigned short)(encoded_divisor >> 16);
c3d95b87 1210
53ad271d
TJ		 1211 // Return the nearest baud rate
1212 return best_baud;
1213}
1214
1941414d 1215/**
ac6944cc
TJ		 1216 * @brief Wrapper function to export ftdi_convert_baudrate() to the unit test
1217 * Do not use, it's only for the unit test framework
1218 **/
1219int convert_baudrate_UT_export(int baudrate, struct ftdi_context *ftdi,
1220 unsigned short *value, unsigned short *index)
1221{
1222 return ftdi_convert_baudrate(baudrate, ftdi, value, index);
1223}
1224
1225/**
9bec2387 1226 Sets the chip baud rate
1941414d
TJ		 1227
1228 \param ftdi pointer to ftdi_context
9bec2387 1229 \param baudrate baud rate to set
1941414d
TJ		 1230
1231 \retval 0: all fine
1232 \retval -1: invalid baudrate
1233 \retval -2: setting baudrate failed
22a1b5c1 1234 \retval -3: USB device unavailable
a3da1d95 1235*/
a8f46ddc
TJ		 1236int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
1237{
53ad271d
TJ		 1238 unsigned short value, index;
1239 int actual_baudrate;
a3da1d95 1240
22a1b5c1
TJ		 1241 if (ftdi == NULL || ftdi->usb_dev == NULL)
1242 ftdi_error_return(-3, "USB device unavailable");
1243
22d12cda
TJ		 1244 if (ftdi->bitbang_enabled)
1245 {
a3da1d95
GE		 1246 baudrate = baudrate*4;
1247 }
1248
25707904 1249 actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index);
c3d95b87
TJ		 1250 if (actual_baudrate <= 0)
1251 ftdi_error_return (-1, "Silly baudrate <= 0.");
a3da1d95 1252
53ad271d
TJ		 1253 // Check within tolerance (about 5%)
1254 if ((actual_baudrate * 2 < baudrate /* Catch overflows */ )
1255 || ((actual_baudrate < baudrate)
1256 ? (actual_baudrate * 21 < baudrate * 20)
c3d95b87
TJ		 1257 : (baudrate * 21 < actual_baudrate * 20)))
1258 ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4");
545820ce 1259
579b006f
JZ		 1260 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1261 SIO_SET_BAUDRATE_REQUEST, value,
1262 index, NULL, 0, ftdi->usb_write_timeout) < 0)
c3d95b87 1263 ftdi_error_return (-2, "Setting new baudrate failed");
a3da1d95
GE		 1264
1265 ftdi->baudrate = baudrate;
1266 return 0;
1267}
1268
1941414d 1269/**
6c32e222
TJ		 1270 Set (RS232) line characteristics.
1271 The break type can only be set via ftdi_set_line_property2()
1272 and defaults to "off".
4837f98a 1273
1941414d
TJ		 1274 \param ftdi pointer to ftdi_context
1275 \param bits Number of bits
1276 \param sbit Number of stop bits
1277 \param parity Parity mode
1278
1279 \retval 0: all fine
1280 \retval -1: Setting line property failed
2f73e59f
TJ		 1281*/
1282int ftdi_set_line_property(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
d2f10023 1283 enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity)
2f73e59f 1284{
6c32e222
TJ		 1285 return ftdi_set_line_property2(ftdi, bits, sbit, parity, BREAK_OFF);
1286}
1287
1288/**
1289 Set (RS232) line characteristics
1290
1291 \param ftdi pointer to ftdi_context
1292 \param bits Number of bits
1293 \param sbit Number of stop bits
1294 \param parity Parity mode
1295 \param break_type Break type
1296
1297 \retval 0: all fine
1298 \retval -1: Setting line property failed
22a1b5c1 1299 \retval -2: USB device unavailable
6c32e222
TJ		 1300*/
1301int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
22d12cda
TJ		 1302 enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity,
1303 enum ftdi_break_type break_type)
6c32e222 1304{
2f73e59f
TJ		 1305 unsigned short value = bits;
1306
22a1b5c1
TJ		 1307 if (ftdi == NULL || ftdi->usb_dev == NULL)
1308 ftdi_error_return(-2, "USB device unavailable");
1309
22d12cda
TJ		 1310 switch (parity)
1311 {
1312 case NONE:
1313 value |= (0x00 << 8);
1314 break;
1315 case ODD:
1316 value |= (0x01 << 8);
1317 break;
1318 case EVEN:
1319 value |= (0x02 << 8);
1320 break;
1321 case MARK:
1322 value |= (0x03 << 8);
1323 break;
1324 case SPACE:
1325 value |= (0x04 << 8);
1326 break;
2f73e59f 1327 }
d2f10023 1328
22d12cda
TJ		 1329 switch (sbit)
1330 {
1331 case STOP_BIT_1:
1332 value |= (0x00 << 11);
1333 break;
1334 case STOP_BIT_15:
1335 value |= (0x01 << 11);
1336 break;
1337 case STOP_BIT_2:
1338 value |= (0x02 << 11);
1339 break;
2f73e59f 1340 }
d2f10023 1341
22d12cda
TJ		 1342 switch (break_type)
1343 {
1344 case BREAK_OFF:
1345 value |= (0x00 << 14);
1346 break;
1347 case BREAK_ON:
1348 value |= (0x01 << 14);
1349 break;
6c32e222
TJ		 1350 }
1351
579b006f
JZ		 1352 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
1353 SIO_SET_DATA_REQUEST, value,
1354 ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
2f73e59f 1355 ftdi_error_return (-1, "Setting new line property failed");
d2f10023 1356
2f73e59f
TJ		 1357 return 0;
1358}
a3da1d95 1359
1941414d
TJ		 1360/**
1361 Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip
1362
1363 \param ftdi pointer to ftdi_context
1364 \param buf Buffer with the data
1365 \param size Size of the buffer
1366
22a1b5c1 1367 \retval -666: USB device unavailable
1941414d
TJ		 1368 \retval <0: error code from usb_bulk_write()
1369 \retval >0: number of bytes written
1370*/
a8f46ddc
TJ		 1371int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
1372{
a3da1d95 1373 int offset = 0;
579b006f 1374 int actual_length;
c3d95b87 1375
22a1b5c1
TJ		 1376 if (ftdi == NULL || ftdi->usb_dev == NULL)
1377 ftdi_error_return(-666, "USB device unavailable");
1378
22d12cda
TJ		 1379 while (offset < size)
1380 {
948f9ada 1381 int write_size = ftdi->writebuffer_chunksize;
a3da1d95
GE		 1382
1383 if (offset+write_size > size)
1384 write_size = size-offset;
1385
579b006f
JZ		 1386 if (libusb_bulk_transfer(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, &actual_length, ftdi->usb_write_timeout) < 0)
1387 ftdi_error_return(-1, "usb bulk write failed");
a3da1d95 1388
579b006f 1389 offset += actual_length;
a3da1d95
GE		 1390 }
1391
579b006f 1392 return offset;
a3da1d95
GE		 1393}
1394
579b006f 1395static void ftdi_read_data_cb(struct libusb_transfer *transfer)
22d12cda 1396{
579b006f
JZ		 1397 struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1398 struct ftdi_context *ftdi = tc->ftdi;
1399 int packet_size, actual_length, num_of_chunks, chunk_remains, i, ret;
4c9e3812 1400
b1139150 1401 packet_size = ftdi->max_packet_size;
579b006f
JZ		 1402
1403 actual_length = transfer->actual_length;
1404
1405 if (actual_length > 2)
1406 {
1407 // skip FTDI status bytes.
1408 // Maybe stored in the future to enable modem use
1409 num_of_chunks = actual_length / packet_size;
1410 chunk_remains = actual_length % packet_size;
1411 //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);
1412
1413 ftdi->readbuffer_offset += 2;
1414 actual_length -= 2;
1415
1416 if (actual_length > packet_size - 2)
1417 {
1418 for (i = 1; i < num_of_chunks; i++)
56ac0383
TJ		 1419 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1420 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1421 packet_size - 2);
579b006f
JZ		 1422 if (chunk_remains > 2)
1423 {
1424 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1425 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1426 chunk_remains-2);
1427 actual_length -= 2*num_of_chunks;
1428 }
1429 else
56ac0383 1430 actual_length -= 2*(num_of_chunks-1)+chunk_remains;
579b006f
JZ		 1431 }
1432
1433 if (actual_length > 0)
1434 {
1435 // data still fits in buf?
1436 if (tc->offset + actual_length <= tc->size)
1437 {
1438 memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, actual_length);
1439 //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
1440 tc->offset += actual_length;
1441
1442 ftdi->readbuffer_offset = 0;
1443 ftdi->readbuffer_remaining = 0;
1444
1445 /* Did we read exactly the right amount of bytes? */
1446 if (tc->offset == tc->size)
1447 {
1448 //printf("read_data exact rem %d offset %d\n",
1449 //ftdi->readbuffer_remaining, offset);
1450 tc->completed = 1;
1451 return;
1452 }
1453 }
1454 else
1455 {
1456 // only copy part of the data or size <= readbuffer_chunksize
1457 int part_size = tc->size - tc->offset;
1458 memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, part_size);
1459 tc->offset += part_size;
1460
1461 ftdi->readbuffer_offset += part_size;
1462 ftdi->readbuffer_remaining = actual_length - part_size;
1463
1464 /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
1465 part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
1466 tc->completed = 1;
1467 return;
1468 }
1469 }
1470 }
1471 ret = libusb_submit_transfer (transfer);
1472 if (ret < 0)
1473 tc->completed = 1;
1474}
1475
1476
1477static void ftdi_write_data_cb(struct libusb_transfer *transfer)
7cc9950e 1478{
579b006f
JZ		 1479 struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
1480 struct ftdi_context *ftdi = tc->ftdi;
56ac0383 1481
90ef163e 1482 tc->offset += transfer->actual_length;
56ac0383 1483
579b006f 1484 if (tc->offset == tc->size)
22d12cda 1485 {
579b006f 1486 tc->completed = 1;
7cc9950e 1487 }
579b006f
JZ		 1488 else
1489 {
1490 int write_size = ftdi->writebuffer_chunksize;
1491 int ret;
7cc9950e 1492
579b006f
JZ		 1493 if (tc->offset + write_size > tc->size)
1494 write_size = tc->size - tc->offset;
1495
1496 transfer->length = write_size;
1497 transfer->buffer = tc->buf + tc->offset;
1498 ret = libusb_submit_transfer (transfer);
1499 if (ret < 0)
1500 tc->completed = 1;
1501 }
7cc9950e
GE		 1502}
1503
579b006f 1504
84f85aaa 1505/**
579b006f
JZ		 1506 Writes data to the chip. Does not wait for completion of the transfer
1507 nor does it make sure that the transfer was successful.
1508
249888c8 1509 Use libusb 1.0 asynchronous API.
84f85aaa
GE		 1510
1511 \param ftdi pointer to ftdi_context
579b006f
JZ		 1512 \param buf Buffer with the data
1513 \param size Size of the buffer
84f85aaa 1514
579b006f
JZ		 1515 \retval NULL: Some error happens when submit transfer
1516 \retval !NULL: Pointer to a ftdi_transfer_control
c201f80f 1517*/
579b006f
JZ		 1518
1519struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
7cc9950e 1520{
579b006f 1521 struct ftdi_transfer_control *tc;
5e77e870 1522 struct libusb_transfer *transfer;
579b006f 1523 int write_size, ret;
22d12cda 1524
22a1b5c1 1525 if (ftdi == NULL || ftdi->usb_dev == NULL)
22a1b5c1 1526 return NULL;
22a1b5c1 1527
579b006f 1528 tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
5e77e870
TJ		 1529 if (!tc)
1530 return NULL;
22d12cda 1531
5e77e870
TJ		 1532 transfer = libusb_alloc_transfer(0);
1533 if (!transfer)
1534 {
1535 free(tc);
579b006f 1536 return NULL;
5e77e870 1537 }
22d12cda 1538
579b006f
JZ		 1539 tc->ftdi = ftdi;
1540 tc->completed = 0;
1541 tc->buf = buf;
1542 tc->size = size;
1543 tc->offset = 0;
7cc9950e 1544
9e44fc94 1545 if (size < (int)ftdi->writebuffer_chunksize)
56ac0383 1546 write_size = size;
579b006f 1547 else
56ac0383 1548 write_size = ftdi->writebuffer_chunksize;
22d12cda 1549
90ef163e
YSL		 1550 libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->in_ep, buf,
1551 write_size, ftdi_write_data_cb, tc,
1552 ftdi->usb_write_timeout);
579b006f 1553 transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
7cc9950e 1554
579b006f
JZ		 1555 ret = libusb_submit_transfer(transfer);
1556 if (ret < 0)
1557 {
1558 libusb_free_transfer(transfer);
5e77e870 1559 free(tc);
579b006f 1560 return NULL;
7cc9950e 1561 }
579b006f
JZ		 1562 tc->transfer = transfer;
1563
1564 return tc;
7cc9950e
GE		 1565}
1566
1567/**
579b006f
JZ		 1568 Reads data from the chip. Does not wait for completion of the transfer
1569 nor does it make sure that the transfer was successful.
1570
249888c8 1571 Use libusb 1.0 asynchronous API.
7cc9950e
GE		 1572
1573 \param ftdi pointer to ftdi_context
579b006f
JZ		 1574 \param buf Buffer with the data
1575 \param size Size of the buffer
4c9e3812 1576
579b006f
JZ		 1577 \retval NULL: Some error happens when submit transfer
1578 \retval !NULL: Pointer to a ftdi_transfer_control
4c9e3812 1579*/
579b006f
JZ		 1580
1581struct ftdi_transfer_control *ftdi_read_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
4c9e3812 1582{
579b006f
JZ		 1583 struct ftdi_transfer_control *tc;
1584 struct libusb_transfer *transfer;
1585 int ret;
22d12cda 1586
22a1b5c1
TJ		 1587 if (ftdi == NULL || ftdi->usb_dev == NULL)
1588 return NULL;
1589
579b006f
JZ		 1590 tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
1591 if (!tc)
1592 return NULL;
1593
1594 tc->ftdi = ftdi;
1595 tc->buf = buf;
1596 tc->size = size;
1597
9e44fc94 1598 if (size <= (int)ftdi->readbuffer_remaining)
7cc9950e 1599 {
579b006f 1600 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
7cc9950e 1601
579b006f
JZ		 1602 // Fix offsets
1603 ftdi->readbuffer_remaining -= size;
1604 ftdi->readbuffer_offset += size;
7cc9950e 1605
579b006f 1606 /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
22d12cda 1607
579b006f
JZ		 1608 tc->completed = 1;
1609 tc->offset = size;
1610 tc->transfer = NULL;
1611 return tc;
1612 }
4c9e3812 1613
579b006f
JZ		 1614 tc->completed = 0;
1615 if (ftdi->readbuffer_remaining != 0)
1616 {
1617 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
22d12cda 1618
579b006f
JZ		 1619 tc->offset = ftdi->readbuffer_remaining;
1620 }
1621 else
1622 tc->offset = 0;
22d12cda 1623
579b006f
JZ		 1624 transfer = libusb_alloc_transfer(0);
1625 if (!transfer)
1626 {
1627 free (tc);
1628 return NULL;
1629 }
22d12cda 1630
579b006f
JZ		 1631 ftdi->readbuffer_remaining = 0;
1632 ftdi->readbuffer_offset = 0;
1633
1634 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);
1635 transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
1636
1637 ret = libusb_submit_transfer(transfer);
1638 if (ret < 0)
1639 {
1640 libusb_free_transfer(transfer);
1641 free (tc);
1642 return NULL;
22d12cda 1643 }
579b006f
JZ		 1644 tc->transfer = transfer;
1645
1646 return tc;
4c9e3812
GE		 1647}
1648
1649/**
579b006f 1650 Wait for completion of the transfer.
4c9e3812 1651
249888c8 1652 Use libusb 1.0 asynchronous API.
4c9e3812 1653
579b006f 1654 \param tc pointer to ftdi_transfer_control
4c9e3812 1655
579b006f
JZ		 1656 \retval < 0: Some error happens
1657 \retval >= 0: Data size transferred
4c9e3812 1658*/
579b006f
JZ		 1659
1660int ftdi_transfer_data_done(struct ftdi_transfer_control *tc)
4c9e3812
GE		 1661{
1662 int ret;
4c9e3812 1663
579b006f 1664 while (!tc->completed)
22d12cda 1665 {
29b1dfd9 1666 ret = libusb_handle_events(tc->ftdi->usb_ctx);
4c9e3812 1667 if (ret < 0)
579b006f
JZ		 1668 {
1669 if (ret == LIBUSB_ERROR_INTERRUPTED)
1670 continue;
1671 libusb_cancel_transfer(tc->transfer);
1672 while (!tc->completed)
29b1dfd9 1673 if (libusb_handle_events(tc->ftdi->usb_ctx) < 0)
579b006f
JZ		 1674 break;
1675 libusb_free_transfer(tc->transfer);
1676 free (tc);
579b006f
JZ		 1677 return ret;
1678 }
4c9e3812
GE		 1679 }
1680
90ef163e
YSL		 1681 ret = tc->offset;
1682 /**
1683 * tc->transfer could be NULL if "(size <= ftdi->readbuffer_remaining)"
ef15fab5 1684 * at ftdi_read_data_submit(). Therefore, we need to check it here.
90ef163e 1685 **/
ef15fab5
TJ		 1686 if (tc->transfer)
1687 {
1688 if (tc->transfer->status != LIBUSB_TRANSFER_COMPLETED)
1689 ret = -1;
1690 libusb_free_transfer(tc->transfer);
90ef163e 1691 }
579b006f
JZ		 1692 free(tc);
1693 return ret;
4c9e3812 1694}
579b006f 1695
1941414d
TJ		 1696/**
1697 Configure write buffer chunk size.
1698 Default is 4096.
1699
1700 \param ftdi pointer to ftdi_context
1701 \param chunksize Chunk size
a3da1d95 1702
1941414d 1703 \retval 0: all fine
22a1b5c1 1704 \retval -1: ftdi context invalid
1941414d 1705*/
a8f46ddc
TJ		 1706int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
1707{
22a1b5c1
TJ		 1708 if (ftdi == NULL)
1709 ftdi_error_return(-1, "ftdi context invalid");
1710
948f9ada
TJ		 1711 ftdi->writebuffer_chunksize = chunksize;
1712 return 0;
1713}
1714
1941414d
TJ		 1715/**
1716 Get write buffer chunk size.
1717
1718 \param ftdi pointer to ftdi_context
1719 \param chunksize Pointer to store chunk size in
948f9ada 1720
1941414d 1721 \retval 0: all fine
22a1b5c1 1722 \retval -1: ftdi context invalid
1941414d 1723*/
a8f46ddc
TJ		 1724int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
1725{
22a1b5c1
TJ		 1726 if (ftdi == NULL)
1727 ftdi_error_return(-1, "ftdi context invalid");
1728
948f9ada
TJ		 1729 *chunksize = ftdi->writebuffer_chunksize;
1730 return 0;
1731}
cbabb7d3 1732
1941414d
TJ		 1733/**
1734 Reads data in chunks (see ftdi_read_data_set_chunksize()) from the chip.
1735
1736 Automatically strips the two modem status bytes transfered during every read.
948f9ada 1737
1941414d
TJ		 1738 \param ftdi pointer to ftdi_context
1739 \param buf Buffer to store data in
1740 \param size Size of the buffer
1741
22a1b5c1 1742 \retval -666: USB device unavailable
579b006f 1743 \retval <0: error code from libusb_bulk_transfer()
d77b0e94 1744 \retval 0: no data was available
1941414d
TJ		 1745 \retval >0: number of bytes read
1746
1941414d 1747*/
a8f46ddc
TJ		 1748int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
1749{
579b006f 1750 int offset = 0, ret, i, num_of_chunks, chunk_remains;
e2f12a4f 1751 int packet_size = ftdi->max_packet_size;
579b006f 1752 int actual_length = 1;
f2f00cb5 1753
22a1b5c1
TJ		 1754 if (ftdi == NULL || ftdi->usb_dev == NULL)
1755 ftdi_error_return(-666, "USB device unavailable");
1756
e2f12a4f
TJ		 1757 // Packet size sanity check (avoid division by zero)
1758 if (packet_size == 0)
1759 ftdi_error_return(-1, "max_packet_size is bogus (zero)");
d9f0cce7 1760
948f9ada 1761 // everything we want is still in the readbuffer?
9e44fc94 1762 if (size <= (int)ftdi->readbuffer_remaining)
22d12cda 1763 {
d9f0cce7
TJ		 1764 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
1765
1766 // Fix offsets
1767 ftdi->readbuffer_remaining -= size;
1768 ftdi->readbuffer_offset += size;
1769
545820ce 1770 /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
d9f0cce7
TJ		 1771
1772 return size;
979a145c 1773 }
948f9ada 1774 // something still in the readbuffer, but not enough to satisfy 'size'?
22d12cda
TJ		 1775 if (ftdi->readbuffer_remaining != 0)
1776 {
d9f0cce7 1777 memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
979a145c 1778
d9f0cce7
TJ		 1779 // Fix offset
1780 offset += ftdi->readbuffer_remaining;
948f9ada 1781 }
948f9ada 1782 // do the actual USB read
579b006f 1783 while (offset < size && actual_length > 0)
22d12cda 1784 {
d9f0cce7
TJ		 1785 ftdi->readbuffer_remaining = 0;
1786 ftdi->readbuffer_offset = 0;
98452d97 1787 /* returns how much received */
579b006f 1788 ret = libusb_bulk_transfer (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, &actual_length, ftdi->usb_read_timeout);
c3d95b87
TJ		 1789 if (ret < 0)
1790 ftdi_error_return(ret, "usb bulk read failed");
98452d97 1791
579b006f 1792 if (actual_length > 2)
22d12cda 1793 {
d9f0cce7
TJ		 1794 // skip FTDI status bytes.
1795 // Maybe stored in the future to enable modem use
579b006f
JZ		 1796 num_of_chunks = actual_length / packet_size;
1797 chunk_remains = actual_length % packet_size;
1798 //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);
1c733d33 1799
d9f0cce7 1800 ftdi->readbuffer_offset += 2;
579b006f 1801 actual_length -= 2;
1c733d33 1802
579b006f 1803 if (actual_length > packet_size - 2)
22d12cda 1804 {
1c733d33 1805 for (i = 1; i < num_of_chunks; i++)
f2f00cb5
DC		 1806 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1807 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1808 packet_size - 2);
22d12cda
TJ		 1809 if (chunk_remains > 2)
1810 {
f2f00cb5
DC		 1811 memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
1812 ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
1c733d33 1813 chunk_remains-2);
579b006f 1814 actual_length -= 2*num_of_chunks;
22d12cda
TJ		 1815 }
1816 else
579b006f 1817 actual_length -= 2*(num_of_chunks-1)+chunk_remains;
1c733d33 1818 }
22d12cda 1819 }
579b006f 1820 else if (actual_length <= 2)
22d12cda 1821 {
d9f0cce7
TJ		 1822 // no more data to read?
1823 return offset;
1824 }
579b006f 1825 if (actual_length > 0)
22d12cda 1826 {
d9f0cce7 1827 // data still fits in buf?
579b006f 1828 if (offset+actual_length <= size)
22d12cda 1829 {
579b006f 1830 memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, actual_length);
545820ce 1831 //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
579b006f 1832 offset += actual_length;
d9f0cce7 1833
53ad271d 1834 /* Did we read exactly the right amount of bytes? */
d9f0cce7 1835 if (offset == size)
c4446c36
TJ		 1836 //printf("read_data exact rem %d offset %d\n",
1837 //ftdi->readbuffer_remaining, offset);
d9f0cce7 1838 return offset;
22d12cda
TJ		 1839 }
1840 else
1841 {
d9f0cce7
TJ		 1842 // only copy part of the data or size <= readbuffer_chunksize
1843 int part_size = size-offset;
1844 memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size);
98452d97 1845
d9f0cce7 1846 ftdi->readbuffer_offset += part_size;
579b006f 1847 ftdi->readbuffer_remaining = actual_length-part_size;
d9f0cce7
TJ		 1848 offset += part_size;
1849
579b006f
JZ		 1850 /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
1851 part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
d9f0cce7
TJ		 1852
1853 return offset;
1854 }
1855 }
cbabb7d3 1856 }
948f9ada 1857 // never reached
29c4af7f 1858 return -127;
a3da1d95
GE		 1859}
1860
1941414d
TJ		 1861/**
1862 Configure read buffer chunk size.
1863 Default is 4096.
1864
1865 Automatically reallocates the buffer.
a3da1d95 1866
1941414d
TJ		 1867 \param ftdi pointer to ftdi_context
1868 \param chunksize Chunk size
1869
1870 \retval 0: all fine
22a1b5c1 1871 \retval -1: ftdi context invalid
1941414d 1872*/
a8f46ddc
TJ		 1873int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
1874{
29c4af7f
TJ		 1875 unsigned char *new_buf;
1876
22a1b5c1
TJ		 1877 if (ftdi == NULL)
1878 ftdi_error_return(-1, "ftdi context invalid");
1879
948f9ada
TJ		 1880 // Invalidate all remaining data
1881 ftdi->readbuffer_offset = 0;
1882 ftdi->readbuffer_remaining = 0;
8de6eea4
JZ		 1883#ifdef __linux__
1884 /* We can't set readbuffer_chunksize larger than MAX_BULK_BUFFER_LENGTH,
1885 which is defined in libusb-1.0. Otherwise, each USB read request will
2e685a1f 1886 be divided into multiple URBs. This will cause issues on Linux kernel
8de6eea4
JZ		 1887 older than 2.6.32. */
1888 if (chunksize > 16384)
1889 chunksize = 16384;
1890#endif
948f9ada 1891
c3d95b87
TJ		 1892 if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL)
1893 ftdi_error_return(-1, "out of memory for readbuffer");
d9f0cce7 1894
948f9ada
TJ		 1895 ftdi->readbuffer = new_buf;
1896 ftdi->readbuffer_chunksize = chunksize;
1897
1898 return 0;
1899}
1900
1941414d
TJ		 1901/**
1902 Get read buffer chunk size.
948f9ada 1903
1941414d
TJ		 1904 \param ftdi pointer to ftdi_context
1905 \param chunksize Pointer to store chunk size in
1906
1907 \retval 0: all fine
22a1b5c1 1908 \retval -1: FTDI context invalid
1941414d 1909*/
a8f46ddc
TJ		 1910int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
1911{
22a1b5c1
TJ		 1912 if (ftdi == NULL)
1913 ftdi_error_return(-1, "FTDI context invalid");
1914
948f9ada
TJ		 1915 *chunksize = ftdi->readbuffer_chunksize;
1916 return 0;
1917}
1918
1941414d 1919/**
2d790e37 1920 Enable/disable bitbang modes.
1941414d
TJ		 1921
1922 \param ftdi pointer to ftdi_context
1923 \param bitmask Bitmask to configure lines.
1924 HIGH/ON value configures a line as output.
2d790e37 1925 \param mode Bitbang mode: use the values defined in \ref ftdi_mpsse_mode
1941414d
TJ		 1926
1927 \retval 0: all fine
1928 \retval -1: can't enable bitbang mode
22a1b5c1 1929 \retval -2: USB device unavailable
1941414d 1930*/
2d790e37 1931int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
a8f46ddc 1932{
a3da1d95
GE		 1933 unsigned short usb_val;
1934
22a1b5c1
TJ		 1935 if (ftdi == NULL || ftdi->usb_dev == NULL)
1936 ftdi_error_return(-2, "USB device unavailable");
1937
d9f0cce7 1938 usb_val = bitmask; // low byte: bitmask
2d790e37
TJ		 1939 usb_val |= (mode << 8);
1940 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)
1941 ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a BM/2232C type chip?");
c3d95b87 1942
2d790e37
TJ		 1943 ftdi->bitbang_mode = mode;
1944 ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
a3da1d95
GE		 1945 return 0;
1946}
1947
1941414d
TJ		 1948/**
1949 Disable bitbang mode.
a3da1d95 1950
1941414d
TJ		 1951 \param ftdi pointer to ftdi_context
1952
1953 \retval 0: all fine
1954 \retval -1: can't disable bitbang mode
22a1b5c1 1955 \retval -2: USB device unavailable
1941414d 1956*/
a8f46ddc
TJ		 1957int ftdi_disable_bitbang(struct ftdi_context *ftdi)
1958{
22a1b5c1
TJ		 1959 if (ftdi == NULL || ftdi->usb_dev == NULL)
1960 ftdi_error_return(-2, "USB device unavailable");
1961
579b006f 1962 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)
c3d95b87 1963 ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?");
a3da1d95
GE		 1964
1965 ftdi->bitbang_enabled = 0;
1966 return 0;
1967}
1968
c4446c36 1969
1941414d 1970/**
418aaa72 1971 Directly read pin state, circumventing the read buffer. Useful for bitbang mode.
1941414d
TJ		 1972
1973 \param ftdi pointer to ftdi_context
1974 \param pins Pointer to store pins into
1975
1976 \retval 0: all fine
1977 \retval -1: read pins failed
22a1b5c1 1978 \retval -2: USB device unavailable
1941414d 1979*/
a8f46ddc
TJ		 1980int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
1981{
22a1b5c1
TJ		 1982 if (ftdi == NULL || ftdi->usb_dev == NULL)
1983 ftdi_error_return(-2, "USB device unavailable");
1984
579b006f 1985 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)
c3d95b87 1986 ftdi_error_return(-1, "read pins failed");
a3da1d95 1987
a3da1d95
GE		 1988 return 0;
1989}
1990
1941414d
TJ		 1991/**
1992 Set latency timer
1993
1994 The FTDI chip keeps data in the internal buffer for a specific
1995 amount of time if the buffer is not full yet to decrease
1996 load on the usb bus.
a3da1d95 1997
1941414d
TJ		 1998 \param ftdi pointer to ftdi_context
1999 \param latency Value between 1 and 255
2000
2001 \retval 0: all fine
2002 \retval -1: latency out of range
2003 \retval -2: unable to set latency timer
22a1b5c1 2004 \retval -3: USB device unavailable
1941414d 2005*/
a8f46ddc
TJ		 2006int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
2007{
a3da1d95
GE		 2008 unsigned short usb_val;
2009
c3d95b87
TJ		 2010 if (latency < 1)
2011 ftdi_error_return(-1, "latency out of range. Only valid for 1-255");
a3da1d95 2012
22a1b5c1
TJ		 2013 if (ftdi == NULL || ftdi->usb_dev == NULL)
2014 ftdi_error_return(-3, "USB device unavailable");
2015
d79d2e68 2016 usb_val = latency;
579b006f 2017 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)
c3d95b87
TJ		 2018 ftdi_error_return(-2, "unable to set latency timer");
2019
a3da1d95
GE		 2020 return 0;
2021}
2022
1941414d
TJ		 2023/**
2024 Get latency timer
a3da1d95 2025
1941414d
TJ		 2026 \param ftdi pointer to ftdi_context
2027 \param latency Pointer to store latency value in
2028
2029 \retval 0: all fine
2030 \retval -1: unable to get latency timer
22a1b5c1 2031 \retval -2: USB device unavailable
1941414d 2032*/
a8f46ddc
TJ		 2033int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
2034{
a3da1d95 2035 unsigned short usb_val;
22a1b5c1
TJ		 2036
2037 if (ftdi == NULL || ftdi->usb_dev == NULL)
2038 ftdi_error_return(-2, "USB device unavailable");
2039
579b006f 2040 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)
c3d95b87 2041 ftdi_error_return(-1, "reading latency timer failed");
a3da1d95
GE		 2042
2043 *latency = (unsigned char)usb_val;
2044 return 0;
2045}
2046
1941414d 2047/**
1189b11a
TJ		 2048 Poll modem status information
2049
2050 This function allows the retrieve the two status bytes of the device.
2051 The device sends these bytes also as a header for each read access
2052 where they are discarded by ftdi_read_data(). The chip generates
2053 the two stripped status bytes in the absence of data every 40 ms.
2054
2055 Layout of the first byte:
2056 - B0..B3 - must be 0
2057 - B4 Clear to send (CTS)
2058 0 = inactive
2059 1 = active
2060 - B5 Data set ready (DTS)
2061 0 = inactive
2062 1 = active
2063 - B6 Ring indicator (RI)
2064 0 = inactive
2065 1 = active
2066 - B7 Receive line signal detect (RLSD)
2067 0 = inactive
2068 1 = active
2069
2070 Layout of the second byte:
2071 - B0 Data ready (DR)
2072 - B1 Overrun error (OE)
2073 - B2 Parity error (PE)
2074 - B3 Framing error (FE)
2075 - B4 Break interrupt (BI)
2076 - B5 Transmitter holding register (THRE)
2077 - B6 Transmitter empty (TEMT)
2078 - B7 Error in RCVR FIFO
2079
2080 \param ftdi pointer to ftdi_context
2081 \param status Pointer to store status information in. Must be two bytes.
2082
2083 \retval 0: all fine
2084 \retval -1: unable to retrieve status information
22a1b5c1 2085 \retval -2: USB device unavailable
1189b11a
TJ		 2086*/
2087int ftdi_poll_modem_status(struct ftdi_context *ftdi, unsigned short *status)
2088{
2089 char usb_val[2];
2090
22a1b5c1
TJ		 2091 if (ftdi == NULL || ftdi->usb_dev == NULL)
2092 ftdi_error_return(-2, "USB device unavailable");
2093
579b006f 2094 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)
1189b11a
TJ		 2095 ftdi_error_return(-1, "getting modem status failed");
2096
dc09eaa8 2097 *status = (usb_val[1] << 8) | (usb_val[0] & 0xFF);
1189b11a
TJ		 2098
2099 return 0;
2100}
2101
a7fb8440
TJ		 2102/**
2103 Set flowcontrol for ftdi chip
2104
2105 \param ftdi pointer to ftdi_context
22d12cda
TJ		 2106 \param flowctrl flow control to use. should be
2107 SIO_DISABLE_FLOW_CTRL, SIO_RTS_CTS_HS, SIO_DTR_DSR_HS or SIO_XON_XOFF_HS
a7fb8440
TJ		 2108
2109 \retval 0: all fine
2110 \retval -1: set flow control failed
22a1b5c1 2111 \retval -2: USB device unavailable
a7fb8440
TJ		 2112*/
2113int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
2114{
22a1b5c1
TJ		 2115 if (ftdi == NULL || ftdi->usb_dev == NULL)
2116 ftdi_error_return(-2, "USB device unavailable");
2117
579b006f
JZ		 2118 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2119 SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
2120 NULL, 0, ftdi->usb_write_timeout) < 0)
a7fb8440
TJ		 2121 ftdi_error_return(-1, "set flow control failed");
2122
2123 return 0;
2124}
2125
2126/**
2127 Set dtr line
2128
2129 \param ftdi pointer to ftdi_context
2130 \param state state to set line to (1 or 0)
2131
2132 \retval 0: all fine
2133 \retval -1: set dtr failed
22a1b5c1 2134 \retval -2: USB device unavailable
a7fb8440
TJ		 2135*/
2136int ftdi_setdtr(struct ftdi_context *ftdi, int state)
2137{
2138 unsigned short usb_val;
2139
22a1b5c1
TJ		 2140 if (ftdi == NULL || ftdi->usb_dev == NULL)
2141 ftdi_error_return(-2, "USB device unavailable");
2142
a7fb8440
TJ		 2143 if (state)
2144 usb_val = SIO_SET_DTR_HIGH;
2145 else
2146 usb_val = SIO_SET_DTR_LOW;
2147
579b006f
JZ		 2148 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2149 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2150 NULL, 0, ftdi->usb_write_timeout) < 0)
a7fb8440
TJ		 2151 ftdi_error_return(-1, "set dtr failed");
2152
2153 return 0;
2154}
2155
2156/**
2157 Set rts line
2158
2159 \param ftdi pointer to ftdi_context
2160 \param state state to set line to (1 or 0)
2161
2162 \retval 0: all fine
22a1b5c1
TJ		 2163 \retval -1: set rts failed
2164 \retval -2: USB device unavailable
a7fb8440
TJ		 2165*/
2166int ftdi_setrts(struct ftdi_context *ftdi, int state)
2167{
2168 unsigned short usb_val;
2169
22a1b5c1
TJ		 2170 if (ftdi == NULL || ftdi->usb_dev == NULL)
2171 ftdi_error_return(-2, "USB device unavailable");
2172
a7fb8440
TJ		 2173 if (state)
2174 usb_val = SIO_SET_RTS_HIGH;
2175 else
2176 usb_val = SIO_SET_RTS_LOW;
2177
579b006f
JZ		 2178 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2179 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2180 NULL, 0, ftdi->usb_write_timeout) < 0)
a7fb8440
TJ		 2181 ftdi_error_return(-1, "set of rts failed");
2182
2183 return 0;
2184}
2185
1189b11a 2186/**
22a1b5c1 2187 Set dtr and rts line in one pass
9ecfef2a 2188
22a1b5c1
TJ		 2189 \param ftdi pointer to ftdi_context
2190 \param dtr DTR state to set line to (1 or 0)
2191 \param rts RTS state to set line to (1 or 0)
9ecfef2a 2192
22a1b5c1
TJ		 2193 \retval 0: all fine
2194 \retval -1: set dtr/rts failed
2195 \retval -2: USB device unavailable
9ecfef2a
TJ		 2196 */
2197int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts)
2198{
2199 unsigned short usb_val;
2200
22a1b5c1
TJ		 2201 if (ftdi == NULL || ftdi->usb_dev == NULL)
2202 ftdi_error_return(-2, "USB device unavailable");
2203
9ecfef2a 2204 if (dtr)
22d12cda 2205 usb_val = SIO_SET_DTR_HIGH;
9ecfef2a 2206 else
22d12cda 2207 usb_val = SIO_SET_DTR_LOW;
9ecfef2a
TJ		 2208
2209 if (rts)
22d12cda 2210 usb_val |= SIO_SET_RTS_HIGH;
9ecfef2a 2211 else
22d12cda 2212 usb_val |= SIO_SET_RTS_LOW;
9ecfef2a 2213
579b006f
JZ		 2214 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
2215 SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
2216 NULL, 0, ftdi->usb_write_timeout) < 0)
22d12cda 2217 ftdi_error_return(-1, "set of rts/dtr failed");
9ecfef2a
TJ		 2218
2219 return 0;
2220}
2221
2222/**
1189b11a
TJ		 2223 Set the special event character
2224
2225 \param ftdi pointer to ftdi_context
2226 \param eventch Event character
2227 \param enable 0 to disable the event character, non-zero otherwise
2228
2229 \retval 0: all fine
2230 \retval -1: unable to set event character
22a1b5c1 2231 \retval -2: USB device unavailable
1189b11a
TJ		 2232*/
2233int ftdi_set_event_char(struct ftdi_context *ftdi,
22d12cda 2234 unsigned char eventch, unsigned char enable)
1189b11a
TJ		 2235{
2236 unsigned short usb_val;
2237
22a1b5c1
TJ		 2238 if (ftdi == NULL || ftdi->usb_dev == NULL)
2239 ftdi_error_return(-2, "USB device unavailable");
2240
1189b11a
TJ		 2241 usb_val = eventch;
2242 if (enable)
2243 usb_val |= 1 << 8;
2244
579b006f 2245 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)
1189b11a
TJ		 2246 ftdi_error_return(-1, "setting event character failed");
2247
2248 return 0;
2249}
2250
2251/**
2252 Set error character
2253
2254 \param ftdi pointer to ftdi_context
2255 \param errorch Error character
2256 \param enable 0 to disable the error character, non-zero otherwise
2257
2258 \retval 0: all fine
2259 \retval -1: unable to set error character
22a1b5c1 2260 \retval -2: USB device unavailable
1189b11a
TJ		 2261*/
2262int ftdi_set_error_char(struct ftdi_context *ftdi,
22d12cda 2263 unsigned char errorch, unsigned char enable)
1189b11a
TJ		 2264{
2265 unsigned short usb_val;
2266
22a1b5c1
TJ		 2267 if (ftdi == NULL || ftdi->usb_dev == NULL)
2268 ftdi_error_return(-2, "USB device unavailable");
2269
1189b11a
TJ		 2270 usb_val = errorch;
2271 if (enable)
2272 usb_val |= 1 << 8;
2273
579b006f 2274 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)
1189b11a
TJ		 2275 ftdi_error_return(-1, "setting error character failed");
2276
2277 return 0;
2278}
2279
2280/**
44f41f11 2281 Init eeprom with default values for the connected device
a35aa9bd 2282 \param ftdi pointer to ftdi_context
f14f84d3
UB		 2283 \param manufacturer String to use as Manufacturer
2284 \param product String to use as Product description
2285 \param serial String to use as Serial number description
4e74064b 2286
f14f84d3
UB		 2287 \retval 0: all fine
2288 \retval -1: No struct ftdi_context
2289 \retval -2: No struct ftdi_eeprom
44f41f11 2290 \retval -3: No connected device or device not yet opened
1941414d 2291*/
f14f84d3 2292int ftdi_eeprom_initdefaults(struct ftdi_context *ftdi, char * manufacturer,
56ac0383 2293 char * product, char * serial)
a8f46ddc 2294{
c0a96aed 2295 struct ftdi_eeprom *eeprom;
f505134f 2296
c0a96aed 2297 if (ftdi == NULL)
f14f84d3 2298 ftdi_error_return(-1, "No struct ftdi_context");
c0a96aed
UB		 2299
2300 if (ftdi->eeprom == NULL)
56ac0383 2301 ftdi_error_return(-2,"No struct ftdi_eeprom");
22a1b5c1 2302
c0a96aed 2303 eeprom = ftdi->eeprom;
a02587d5 2304 memset(eeprom, 0, sizeof(struct ftdi_eeprom));
c0a96aed 2305
44f41f11
UB		 2306 if (ftdi->usb_dev == NULL)
2307 ftdi_error_return(-3, "No connected device or device not yet opened");
2308
f396dbad 2309 eeprom->vendor_id = 0x0403;
d4b5af27 2310 eeprom->use_serial = 1;
56ac0383
TJ		 2311 if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM) ||
2312 (ftdi->type == TYPE_R))
a02587d5 2313 eeprom->product_id = 0x6001;
c7e4c09e
UB		 2314 else if (ftdi->type == TYPE_4232H)
2315 eeprom->product_id = 0x6011;
2316 else if (ftdi->type == TYPE_232H)
2317 eeprom->product_id = 0x6014;
a02587d5
UB		 2318 else
2319 eeprom->product_id = 0x6010;
b1859923
UB		 2320 if (ftdi->type == TYPE_AM)
2321 eeprom->usb_version = 0x0101;
2322 else
2323 eeprom->usb_version = 0x0200;
a886436a 2324 eeprom->max_power = 100;
d9f0cce7 2325
74e8e79d
UB		 2326 if (eeprom->manufacturer)
2327 free (eeprom->manufacturer);
b8aa7b35 2328 eeprom->manufacturer = NULL;
74e8e79d
UB		 2329 if (manufacturer)
2330 {
2331 eeprom->manufacturer = malloc(strlen(manufacturer)+1);
2332 if (eeprom->manufacturer)
2333 strcpy(eeprom->manufacturer, manufacturer);
2334 }
2335
2336 if (eeprom->product)
2337 free (eeprom->product);
b8aa7b35 2338 eeprom->product = NULL;
10771971 2339 if(product)
74e8e79d
UB		 2340 {
2341 eeprom->product = malloc(strlen(product)+1);
2342 if (eeprom->product)
2343 strcpy(eeprom->product, product);
2344 }
6a6fcd89
UB		 2345 else
2346 {
2347 const char* default_product;
2348 switch(ftdi->type)
2349 {
2350 case TYPE_AM: default_product = "AM"; break;
2351 case TYPE_BM: default_product = "BM"; break;
2352 case TYPE_2232C: default_product = "Dual RS232"; break;
2353 case TYPE_R: default_product = "FT232R USB UART"; break;
2354 case TYPE_2232H: default_product = "Dual RS232-HS"; break;
2355 case TYPE_4232H: default_product = "FT4232H"; break;
2356 case TYPE_232H: default_product = "Single-RS232-HS"; break;
2357 default:
2358 ftdi_error_return(-3, "Unknown chip type");
2359 }
2360 eeprom->product = malloc(strlen(default_product) +1);
2361 if (eeprom->product)
2362 strcpy(eeprom->product, default_product);
2363 }
74e8e79d
UB		 2364
2365 if (eeprom->serial)
2366 free (eeprom->serial);
b8aa7b35 2367 eeprom->serial = NULL;
74e8e79d
UB		 2368 if (serial)
2369 {
2370 eeprom->serial = malloc(strlen(serial)+1);
2371 if (eeprom->serial)
2372 strcpy(eeprom->serial, serial);
2373 }
2374
56ac0383 2375 if (ftdi->type == TYPE_R)
a4980043 2376 {
a886436a 2377 eeprom->max_power = 90;
a02587d5 2378 eeprom->size = 0x80;
a4980043
UB		 2379 eeprom->cbus_function[0] = CBUS_TXLED;
2380 eeprom->cbus_function[1] = CBUS_RXLED;
2381 eeprom->cbus_function[2] = CBUS_TXDEN;
2382 eeprom->cbus_function[3] = CBUS_PWREN;
2383 eeprom->cbus_function[4] = CBUS_SLEEP;
2384 }
a02587d5 2385 else
263d3ba0
UB		 2386 {
2387 if(ftdi->type == TYPE_232H)
2388 {
2389 int i;
2390 for (i=0; i<10; i++)
2391 eeprom->cbus_function[i] = CBUSH_TRISTATE;
2392 }
a02587d5 2393 eeprom->size = -1;
263d3ba0 2394 }
68e78641
JS		 2395 switch (ftdi->type)
2396 {
2397 case TYPE_AM:
2398 eeprom->release_number = 0x0200;
2399 break;
2400 case TYPE_BM:
2401 eeprom->release_number = 0x0400;
2402 break;
2403 case TYPE_2232C:
2404 eeprom->release_number = 0x0500;
2405 break;
2406 case TYPE_R:
2407 eeprom->release_number = 0x0600;
2408 break;
2409 case TYPE_2232H:
2410 eeprom->release_number = 0x0700;
2411 break;
2412 case TYPE_4232H:
2413 eeprom->release_number = 0x0800;
2414 break;
2415 case TYPE_232H:
2416 eeprom->release_number = 0x0900;
2417 break;
2418 default:
2419 eeprom->release_number = 0x00;
2420 }
f14f84d3 2421 return 0;
b8aa7b35 2422}
263d3ba0
UB		 2423/*FTD2XX doesn't check for values not fitting in the ACBUS Signal oprtions*/
2424void set_ft232h_cbus(struct ftdi_eeprom *eeprom, unsigned char * output)
2425{
2426 int i;
2427 for(i=0; i<5;i++)
2428 {
2429 int mode_low, mode_high;
2430 if (eeprom->cbus_function[2*i]> CBUSH_CLK7_5)
2431 mode_low = CBUSH_TRISTATE;
2432 else
2433 mode_low = eeprom->cbus_function[2*i];
2434 if (eeprom->cbus_function[2*i+1]> CBUSH_CLK7_5)
2435 mode_high = CBUSH_TRISTATE;
2436 else
f37a1524 2437 mode_high = eeprom->cbus_function[2*i+1];
b8aa7b35 2438
f37a1524 2439 output[0x18+i] = (mode_high <<4) | mode_low;
263d3ba0
UB		 2440 }
2441}
c8f69686
UB		 2442/* Return the bits for the encoded EEPROM Structure of a requested Mode
2443 *
2444 */
2445static unsigned char type2bit(unsigned char type, enum ftdi_chip_type chip)
2446{
2447 switch (chip)
2448 {
2449 case TYPE_2232H:
2450 case TYPE_2232C:
2451 {
2452 switch (type)
2453 {
2454 case CHANNEL_IS_UART: return 0;
2455 case CHANNEL_IS_FIFO: return 0x01;
2456 case CHANNEL_IS_OPTO: return 0x02;
2457 case CHANNEL_IS_CPU : return 0x04;
2458 default: return 0;
2459 }
2460 }
2461 case TYPE_232H:
2462 {
2463 switch (type)
2464 {
2465 case CHANNEL_IS_UART : return 0;
2466 case CHANNEL_IS_FIFO : return 0x01;
2467 case CHANNEL_IS_OPTO : return 0x02;
2468 case CHANNEL_IS_CPU : return 0x04;
2469 case CHANNEL_IS_FT1284 : return 0x08;
2470 default: return 0;
2471 }
2472 }
2473 default: return 0;
2474 }
2475 return 0;
2476}
2477
1941414d 2478/**
a35aa9bd 2479 Build binary buffer from ftdi_eeprom structure.
22a1b5c1 2480 Output is suitable for ftdi_write_eeprom().
b8aa7b35 2481
a35aa9bd 2482 \param ftdi pointer to ftdi_context
1941414d 2483
516ebfb1 2484 \retval >=0: size of eeprom user area in bytes
22a1b5c1 2485 \retval -1: eeprom size (128 bytes) exceeded by custom strings
2c1e2bde
TJ		 2486 \retval -2: Invalid eeprom or ftdi pointer
2487 \retval -3: Invalid cbus function setting (FIXME: Not in the code?)
2488 \retval -4: Chip doesn't support invert (FIXME: Not in the code?)
2489 \retval -5: Chip doesn't support high current drive (FIXME: Not in the code?)
2b9a3c82 2490 \retval -6: No connected EEPROM or EEPROM Type unknown
b8aa7b35 2491*/
a35aa9bd 2492int ftdi_eeprom_build(struct ftdi_context *ftdi)
a8f46ddc 2493{
e2bbd9af 2494 unsigned char i, j, eeprom_size_mask;
b8aa7b35
TJ		 2495 unsigned short checksum, value;
2496 unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
516ebfb1 2497 int user_area_size;
c0a96aed 2498 struct ftdi_eeprom *eeprom;
a35aa9bd 2499 unsigned char * output;
b8aa7b35 2500
c0a96aed 2501 if (ftdi == NULL)
cc9c9d58 2502 ftdi_error_return(-2,"No context");
c0a96aed 2503 if (ftdi->eeprom == NULL)
cc9c9d58 2504 ftdi_error_return(-2,"No eeprom structure");
c0a96aed
UB		 2505
2506 eeprom= ftdi->eeprom;
a35aa9bd 2507 output = eeprom->buf;
22a1b5c1 2508
56ac0383 2509 if (eeprom->chip == -1)
2c1e2bde 2510 ftdi_error_return(-6,"No connected EEPROM or EEPROM type unknown");
2b9a3c82 2511
f75bf139
UB		 2512 if ((eeprom->chip == 0x56) || (eeprom->chip == 0x66))
2513 eeprom->size = 0x100;
2514 else
2515 eeprom->size = 0x80;
2516
b8aa7b35 2517 if (eeprom->manufacturer != NULL)
d9f0cce7 2518 manufacturer_size = strlen(eeprom->manufacturer);
b8aa7b35 2519 if (eeprom->product != NULL)
d9f0cce7 2520 product_size = strlen(eeprom->product);
b8aa7b35 2521 if (eeprom->serial != NULL)
d9f0cce7 2522 serial_size = strlen(eeprom->serial);
b8aa7b35 2523
814710ba
TJ		 2524 // eeprom size check
2525 switch (ftdi->type)
2526 {
2527 case TYPE_AM:
2528 case TYPE_BM:
2529 user_area_size = 96; // base size for strings (total of 48 characters)
2530 break;
2531 case TYPE_2232C:
56ac0383
TJ		 2532 user_area_size = 90; // two extra config bytes and 4 bytes PnP stuff
2533 break;
814710ba 2534 case TYPE_R:
56ac0383
TJ		 2535 user_area_size = 88; // four extra config bytes + 4 bytes PnP stuff
2536 break;
814710ba
TJ		 2537 case TYPE_2232H: // six extra config bytes + 4 bytes PnP stuff
2538 case TYPE_4232H:
56ac0383 2539 user_area_size = 86;
118c4561 2540 break;
c1c3d564
UB		 2541 case TYPE_232H:
2542 user_area_size = 80;
2543 break;
2c1e2bde
TJ		 2544 default:
2545 user_area_size = 0;
56ac0383 2546 break;
665cda04
UB		 2547 }
2548 user_area_size -= (manufacturer_size + product_size + serial_size) * 2;
814710ba 2549
516ebfb1
TJ		 2550 if (user_area_size < 0)
2551 ftdi_error_return(-1,"eeprom size exceeded");
b8aa7b35
TJ		 2552
2553 // empty eeprom
a35aa9bd 2554 memset (ftdi->eeprom->buf, 0, FTDI_MAX_EEPROM_SIZE);
b8aa7b35 2555
93738c79
UB		 2556 // Bytes and Bits set for all Types
2557
b8aa7b35
TJ		 2558 // Addr 02: Vendor ID
2559 output[0x02] = eeprom->vendor_id;
2560 output[0x03] = eeprom->vendor_id >> 8;
2561
2562 // Addr 04: Product ID
2563 output[0x04] = eeprom->product_id;
2564 output[0x05] = eeprom->product_id >> 8;
2565
2566 // Addr 06: Device release number (0400h for BM features)
68e78641
JS		 2567 output[0x06] = eeprom->release_number;
2568 output[0x07] = eeprom->release_number >> 8;
b8aa7b35
TJ		 2569
2570 // Addr 08: Config descriptor
8fae3e8e
TJ		 2571 // Bit 7: always 1
2572 // Bit 6: 1 if this device is self powered, 0 if bus powered
2573 // Bit 5: 1 if this device uses remote wakeup
37186e34 2574 // Bit 4-0: reserved - 0
5a1dcd55 2575 j = 0x80;
afb90824 2576 if (eeprom->self_powered)
5a1dcd55 2577 j |= 0x40;
afb90824 2578 if (eeprom->remote_wakeup)
5a1dcd55 2579 j |= 0x20;
b8aa7b35
TJ		 2580 output[0x08] = j;
2581
2582 // Addr 09: Max power consumption: max power = value * 2 mA
a7c32c59 2583 output[0x09] = eeprom->max_power / MAX_POWER_MILLIAMP_PER_UNIT;
d9f0cce7 2584
56ac0383 2585 if (ftdi->type != TYPE_AM)
93738c79
UB		 2586 {
2587 // Addr 0A: Chip configuration
2588 // Bit 7: 0 - reserved
2589 // Bit 6: 0 - reserved
2590 // Bit 5: 0 - reserved
56ac0383 2591 // Bit 4: 1 - Change USB version
93738c79
UB		 2592 // Bit 3: 1 - Use the serial number string
2593 // Bit 2: 1 - Enable suspend pull downs for lower power
2594 // Bit 1: 1 - Out EndPoint is Isochronous
2595 // Bit 0: 1 - In EndPoint is Isochronous
2596 //
2597 j = 0;
afb90824 2598 if (eeprom->in_is_isochronous)
93738c79 2599 j = j | 1;
afb90824 2600 if (eeprom->out_is_isochronous)
93738c79
UB		 2601 j = j | 2;
2602 output[0x0A] = j;
2603 }
f505134f 2604
b8aa7b35 2605 // Dynamic content
93738c79
UB		 2606 // Strings start at 0x94 (TYPE_AM, TYPE_BM)
2607 // 0x96 (TYPE_2232C), 0x98 (TYPE_R) and 0x9a (TYPE_x232H)
c7e4c09e 2608 // 0xa0 (TYPE_232H)
93738c79 2609 i = 0;
56ac0383
TJ		 2610 switch (ftdi->type)
2611 {
c7e4c09e
UB		 2612 case TYPE_232H:
2613 i += 2;
56ac0383
TJ		 2614 case TYPE_2232H:
2615 case TYPE_4232H:
2616 i += 2;
2617 case TYPE_R:
2618 i += 2;
2619 case TYPE_2232C:
2620 i += 2;
2621 case TYPE_AM:
2622 case TYPE_BM:
2623 i += 0x94;
f505134f 2624 }
93738c79 2625 /* Wrap around 0x80 for 128 byte EEPROMS (Internale and 93x46) */
e2bbd9af 2626 eeprom_size_mask = eeprom->size -1;
c201f80f 2627
93738c79
UB		 2628 // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
2629 // Addr 0F: Length of manufacturer string
22d12cda 2630 // Output manufacturer
93738c79 2631 output[0x0E] = i; // calculate offset
e2bbd9af
TJ		 2632 output[i & eeprom_size_mask] = manufacturer_size*2 + 2, i++;
2633 output[i & eeprom_size_mask] = 0x03, i++; // type: string
22d12cda
TJ		 2634 for (j = 0; j < manufacturer_size; j++)
2635 {
e2bbd9af
TJ		 2636 output[i & eeprom_size_mask] = eeprom->manufacturer[j], i++;
2637 output[i & eeprom_size_mask] = 0x00, i++;
b8aa7b35 2638 }
93738c79 2639 output[0x0F] = manufacturer_size*2 + 2;
b8aa7b35 2640
93738c79
UB		 2641 // Addr 10: Offset of the product string + 0x80, calculated later
2642 // Addr 11: Length of product string
c201f80f 2643 output[0x10] = i | 0x80; // calculate offset
e2bbd9af
TJ		 2644 output[i & eeprom_size_mask] = product_size*2 + 2, i++;
2645 output[i & eeprom_size_mask] = 0x03, i++;
22d12cda
TJ		 2646 for (j = 0; j < product_size; j++)
2647 {
e2bbd9af
TJ		 2648 output[i & eeprom_size_mask] = eeprom->product[j], i++;
2649 output[i & eeprom_size_mask] = 0x00, i++;
b8aa7b35 2650 }
93738c79 2651 output[0x11] = product_size*2 + 2;
37186e34 2652
93738c79
UB		 2653 // Addr 12: Offset of the serial string + 0x80, calculated later
2654 // Addr 13: Length of serial string
c201f80f 2655 output[0x12] = i | 0x80; // calculate offset
e2bbd9af
TJ		 2656 output[i & eeprom_size_mask] = serial_size*2 + 2, i++;
2657 output[i & eeprom_size_mask] = 0x03, i++;
22d12cda
TJ		 2658 for (j = 0; j < serial_size; j++)
2659 {
e2bbd9af
TJ		 2660 output[i & eeprom_size_mask] = eeprom->serial[j], i++;
2661 output[i & eeprom_size_mask] = 0x00, i++;
b8aa7b35 2662 }
c2700d6d
TJ		 2663
2664 // Legacy port name and PnP fields for FT2232 and newer chips
2665 if (ftdi->type > TYPE_BM)
2666 {
2667 output[i & eeprom_size_mask] = 0x02; /* as seen when written with FTD2XX */
2668 i++;
2669 output[i & eeprom_size_mask] = 0x03; /* as seen when written with FTD2XX */
2670 i++;
2671 output[i & eeprom_size_mask] = eeprom->is_not_pnp; /* as seen when written with FTD2XX */
2672 i++;
2673 }
802a949e 2674
93738c79 2675 output[0x13] = serial_size*2 + 2;
b8aa7b35 2676
56ac0383 2677 if (ftdi->type > TYPE_AM) /* use_serial not used in AM devices */
bf2f6ef7 2678 {
d4b5af27 2679 if (eeprom->use_serial)
bf2f6ef7
UB		 2680 output[0x0A] |= USE_SERIAL_NUM;
2681 else
2682 output[0x0A] &= ~USE_SERIAL_NUM;
2683 }
3802140c
UB		 2684
2685 /* Bytes and Bits specific to (some) types
2686 Write linear, as this allows easier fixing*/
56ac0383
TJ		 2687 switch (ftdi->type)
2688 {
2689 case TYPE_AM:
2690 break;
2691 case TYPE_BM:
2692 output[0x0C] = eeprom->usb_version & 0xff;
2693 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
2694 if (eeprom->use_usb_version == USE_USB_VERSION_BIT)
2695 output[0x0A] |= USE_USB_VERSION_BIT;
2696 else
2697 output[0x0A] &= ~USE_USB_VERSION_BIT;
caec1294 2698
56ac0383
TJ		 2699 break;
2700 case TYPE_2232C:
3802140c 2701
c8f69686 2702 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232C);
56ac0383
TJ		 2703 if ( eeprom->channel_a_driver == DRIVER_VCP)
2704 output[0x00] |= DRIVER_VCP;
2705 else
2706 output[0x00] &= ~DRIVER_VCP;
4e74064b 2707
56ac0383
TJ		 2708 if ( eeprom->high_current_a == HIGH_CURRENT_DRIVE)
2709 output[0x00] |= HIGH_CURRENT_DRIVE;
2710 else
2711 output[0x00] &= ~HIGH_CURRENT_DRIVE;
3802140c 2712
c8f69686 2713 output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232C);
56ac0383
TJ		 2714 if ( eeprom->channel_b_driver == DRIVER_VCP)
2715 output[0x01] |= DRIVER_VCP;
2716 else
2717 output[0x01] &= ~DRIVER_VCP;
4e74064b 2718
56ac0383
TJ		 2719 if ( eeprom->high_current_b == HIGH_CURRENT_DRIVE)
2720 output[0x01] |= HIGH_CURRENT_DRIVE;
2721 else
2722 output[0x01] &= ~HIGH_CURRENT_DRIVE;
3802140c 2723
afb90824 2724 if (eeprom->in_is_isochronous)
56ac0383
TJ		 2725 output[0x0A] |= 0x1;
2726 else
2727 output[0x0A] &= ~0x1;
afb90824 2728 if (eeprom->out_is_isochronous)
56ac0383
TJ		 2729 output[0x0A] |= 0x2;
2730 else
2731 output[0x0A] &= ~0x2;
afb90824 2732 if (eeprom->suspend_pull_downs)
56ac0383
TJ		 2733 output[0x0A] |= 0x4;
2734 else
2735 output[0x0A] &= ~0x4;
2736 if (eeprom->use_usb_version == USE_USB_VERSION_BIT)
2737 output[0x0A] |= USE_USB_VERSION_BIT;
2738 else
2739 output[0x0A] &= ~USE_USB_VERSION_BIT;
4e74064b 2740
56ac0383
TJ		 2741 output[0x0C] = eeprom->usb_version & 0xff;
2742 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
2743 output[0x14] = eeprom->chip;
2744 break;
2745 case TYPE_R:
2746 if (eeprom->high_current == HIGH_CURRENT_DRIVE_R)
2747 output[0x00] |= HIGH_CURRENT_DRIVE_R;
2748 output[0x01] = 0x40; /* Hard coded Endpoint Size*/
4e74064b 2749
afb90824 2750 if (eeprom->suspend_pull_downs)
56ac0383
TJ		 2751 output[0x0A] |= 0x4;
2752 else
2753 output[0x0A] &= ~0x4;
2754 output[0x0B] = eeprom->invert;
2755 output[0x0C] = eeprom->usb_version & 0xff;
2756 output[0x0D] = (eeprom->usb_version>>8) & 0xff;
4e74064b 2757
56ac0383
TJ		 2758 if (eeprom->cbus_function[0] > CBUS_BB)
2759 output[0x14] = CBUS_TXLED;
2760 else
2761 output[0x14] = eeprom->cbus_function[0];
4e74064b 2762
56ac0383
TJ		 2763 if (eeprom->cbus_function[1] > CBUS_BB)
2764 output[0x14] |= CBUS_RXLED<<4;
2765 else
2766 output[0x14] |= eeprom->cbus_function[1]<<4;
4e74064b 2767
56ac0383
TJ		 2768 if (eeprom->cbus_function[2] > CBUS_BB)
2769 output[0x15] = CBUS_TXDEN;
2770 else
2771 output[0x15] = eeprom->cbus_function[2];
4e74064b 2772
56ac0383
TJ		 2773 if (eeprom->cbus_function[3] > CBUS_BB)
2774 output[0x15] |= CBUS_PWREN<<4;
2775 else
2776 output[0x15] |= eeprom->cbus_function[3]<<4;
4e74064b 2777
56ac0383
TJ		 2778 if (eeprom->cbus_function[4] > CBUS_CLK6)
2779 output[0x16] = CBUS_SLEEP;
2780 else
2781 output[0x16] = eeprom->cbus_function[4];
2782 break;
2783 case TYPE_2232H:
c8f69686 2784 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_2232H);
56ac0383
TJ		 2785 if ( eeprom->channel_a_driver == DRIVER_VCP)
2786 output[0x00] |= DRIVER_VCP;
2787 else
2788 output[0x00] &= ~DRIVER_VCP;
6e6a1c3f 2789
c8f69686 2790 output[0x01] = type2bit(eeprom->channel_b_type, TYPE_2232H);
56ac0383
TJ		 2791 if ( eeprom->channel_b_driver == DRIVER_VCP)
2792 output[0x01] |= DRIVER_VCP;
2793 else
2794 output[0x01] &= ~DRIVER_VCP;
2795 if (eeprom->suspend_dbus7 == SUSPEND_DBUS7_BIT)
2796 output[0x01] |= SUSPEND_DBUS7_BIT;
2797 else
2798 output[0x01] &= ~SUSPEND_DBUS7_BIT;
2799
afb90824 2800 if (eeprom->suspend_pull_downs)
56ac0383
TJ		 2801 output[0x0A] |= 0x4;
2802 else
2803 output[0x0A] &= ~0x4;
2804
2805 if (eeprom->group0_drive > DRIVE_16MA)
2806 output[0x0c] |= DRIVE_16MA;
2807 else
2808 output[0x0c] |= eeprom->group0_drive;
2809 if (eeprom->group0_schmitt == IS_SCHMITT)
2810 output[0x0c] |= IS_SCHMITT;
2811 if (eeprom->group0_slew == SLOW_SLEW)
2812 output[0x0c] |= SLOW_SLEW;
2813
2814 if (eeprom->group1_drive > DRIVE_16MA)
2815 output[0x0c] |= DRIVE_16MA<<4;
2816 else
2817 output[0x0c] |= eeprom->group1_drive<<4;
2818 if (eeprom->group1_schmitt == IS_SCHMITT)
2819 output[0x0c] |= IS_SCHMITT<<4;
2820 if (eeprom->group1_slew == SLOW_SLEW)
2821 output[0x0c] |= SLOW_SLEW<<4;
2822
2823 if (eeprom->group2_drive > DRIVE_16MA)
2824 output[0x0d] |= DRIVE_16MA;
2825 else
2826 output[0x0d] |= eeprom->group2_drive;
2827 if (eeprom->group2_schmitt == IS_SCHMITT)
2828 output[0x0d] |= IS_SCHMITT;
2829 if (eeprom->group2_slew == SLOW_SLEW)
2830 output[0x0d] |= SLOW_SLEW;
2831
2832 if (eeprom->group3_drive > DRIVE_16MA)
2833 output[0x0d] |= DRIVE_16MA<<4;
2834 else
2835 output[0x0d] |= eeprom->group3_drive<<4;
2836 if (eeprom->group3_schmitt == IS_SCHMITT)
2837 output[0x0d] |= IS_SCHMITT<<4;
2838 if (eeprom->group3_slew == SLOW_SLEW)
2839 output[0x0d] |= SLOW_SLEW<<4;
3802140c 2840
56ac0383 2841 output[0x18] = eeprom->chip;
3802140c 2842
56ac0383
TJ		 2843 break;
2844 case TYPE_4232H:
be4bae37
AL		 2845 if (eeprom->channel_a_driver == DRIVER_VCP)
2846 output[0x00] |= DRIVER_VCP;
2847 else
2848 output[0x00] &= ~DRIVER_VCP;
2849 if (eeprom->channel_b_driver == DRIVER_VCP)
2850 output[0x01] |= DRIVER_VCP;
2851 else
2852 output[0x01] &= ~DRIVER_VCP;
2853 if (eeprom->channel_c_driver == DRIVER_VCP)
2854 output[0x00] |= (DRIVER_VCP << 4);
2855 else
2856 output[0x00] &= ~(DRIVER_VCP << 4);
2857 if (eeprom->channel_d_driver == DRIVER_VCP)
2858 output[0x01] |= (DRIVER_VCP << 4);
2859 else
2860 output[0x01] &= ~(DRIVER_VCP << 4);
2861
afb90824 2862 if (eeprom->suspend_pull_downs)
be4bae37
AL		 2863 output[0x0a] |= 0x4;
2864 else
2865 output[0x0a] &= ~0x4;
2866
2867 if (eeprom->channel_a_rs485enable)
2868 output[0x0b] |= CHANNEL_IS_RS485 << 0;
2869 else
2870 output[0x0b] &= ~(CHANNEL_IS_RS485 << 0);
2871 if (eeprom->channel_b_rs485enable)
2872 output[0x0b] |= CHANNEL_IS_RS485 << 1;
2873 else
2874 output[0x0b] &= ~(CHANNEL_IS_RS485 << 1);
2875 if (eeprom->channel_c_rs485enable)
2876 output[0x0b] |= CHANNEL_IS_RS485 << 2;
2877 else
2878 output[0x0b] &= ~(CHANNEL_IS_RS485 << 2);
2879 if (eeprom->channel_d_rs485enable)
2880 output[0x0b] |= CHANNEL_IS_RS485 << 3;
2881 else
2882 output[0x0b] &= ~(CHANNEL_IS_RS485 << 3);
2883
2884 if (eeprom->group0_drive > DRIVE_16MA)
2885 output[0x0c] |= DRIVE_16MA;
2886 else
2887 output[0x0c] |= eeprom->group0_drive;
2888 if (eeprom->group0_schmitt == IS_SCHMITT)
2889 output[0x0c] |= IS_SCHMITT;
2890 if (eeprom->group0_slew == SLOW_SLEW)
2891 output[0x0c] |= SLOW_SLEW;
2892
2893 if (eeprom->group1_drive > DRIVE_16MA)
2894 output[0x0c] |= DRIVE_16MA<<4;
2895 else
2896 output[0x0c] |= eeprom->group1_drive<<4;
2897 if (eeprom->group1_schmitt == IS_SCHMITT)
2898 output[0x0c] |= IS_SCHMITT<<4;
2899 if (eeprom->group1_slew == SLOW_SLEW)
2900 output[0x0c] |= SLOW_SLEW<<4;
2901
2902 if (eeprom->group2_drive > DRIVE_16MA)
2903 output[0x0d] |= DRIVE_16MA;
2904 else
2905 output[0x0d] |= eeprom->group2_drive;
2906 if (eeprom->group2_schmitt == IS_SCHMITT)
2907 output[0x0d] |= IS_SCHMITT;
2908 if (eeprom->group2_slew == SLOW_SLEW)
2909 output[0x0d] |= SLOW_SLEW;
2910
2911 if (eeprom->group3_drive > DRIVE_16MA)
2912 output[0x0d] |= DRIVE_16MA<<4;
2913 else
2914 output[0x0d] |= eeprom->group3_drive<<4;
2915 if (eeprom->group3_schmitt == IS_SCHMITT)
2916 output[0x0d] |= IS_SCHMITT<<4;
2917 if (eeprom->group3_slew == SLOW_SLEW)
2918 output[0x0d] |= SLOW_SLEW<<4;
2919
c7e4c09e 2920 output[0x18] = eeprom->chip;
be4bae37 2921
c7e4c09e
UB		 2922 break;
2923 case TYPE_232H:
c8f69686 2924 output[0x00] = type2bit(eeprom->channel_a_type, TYPE_232H);
ac4a82a5
UB		 2925 if ( eeprom->channel_a_driver == DRIVER_VCP)
2926 output[0x00] |= DRIVER_VCPH;
2927 else
2928 output[0x00] &= ~DRIVER_VCPH;
837a71d6
UB		 2929 if (eeprom->powersave)
2930 output[0x01] |= POWER_SAVE_DISABLE_H;
2931 else
2932 output[0x01] &= ~POWER_SAVE_DISABLE_H;
18199b76
UB		 2933 if (eeprom->clock_polarity)
2934 output[0x01] |= FT1284_CLK_IDLE_STATE;
2935 else
2936 output[0x01] &= ~FT1284_CLK_IDLE_STATE;
2937 if (eeprom->data_order)
2938 output[0x01] |= FT1284_DATA_LSB;
2939 else
2940 output[0x01] &= ~FT1284_DATA_LSB;
2941 if (eeprom->flow_control)
2942 output[0x01] |= FT1284_FLOW_CONTROL;
2943 else
2944 output[0x01] &= ~FT1284_FLOW_CONTROL;
91d7a201
UB		 2945 if (eeprom->group0_drive > DRIVE_16MA)
2946 output[0x0c] |= DRIVE_16MA;
2947 else
2948 output[0x0c] |= eeprom->group0_drive;
2949 if (eeprom->group0_schmitt == IS_SCHMITT)
2950 output[0x0c] |= IS_SCHMITT;
2951 if (eeprom->group0_slew == SLOW_SLEW)
2952 output[0x0c] |= SLOW_SLEW;
2953
2954 if (eeprom->group1_drive > DRIVE_16MA)
2955 output[0x0d] |= DRIVE_16MA;
2956 else
2957 output[0x0d] |= eeprom->group1_drive;
2958 if (eeprom->group1_schmitt == IS_SCHMITT)
2959 output[0x0d] |= IS_SCHMITT;
2960 if (eeprom->group1_slew == SLOW_SLEW)
2961 output[0x0d] |= SLOW_SLEW;
2962
263d3ba0
UB		 2963 set_ft232h_cbus(eeprom, output);
2964
c7e4c09e
UB		 2965 output[0x1e] = eeprom->chip;
2966 fprintf(stderr,"FIXME: Build FT232H specific EEPROM settings\n");
2967 break;
2968
3802140c
UB		 2969 }
2970
cbf65673 2971 // calculate checksum
b8aa7b35 2972 checksum = 0xAAAA;
d9f0cce7 2973
22d12cda
TJ		 2974 for (i = 0; i < eeprom->size/2-1; i++)
2975 {
d9f0cce7
TJ		 2976 value = output[i*2];
2977 value += output[(i*2)+1] << 8;
b8aa7b35 2978
d9f0cce7
TJ		 2979 checksum = value^checksum;
2980 checksum = (checksum << 1) | (checksum >> 15);
b8aa7b35
TJ		 2981 }
2982
c201f80f
TJ		 2983 output[eeprom->size-2] = checksum;
2984 output[eeprom->size-1] = checksum >> 8;
b8aa7b35 2985
68e78641 2986 eeprom->initialized_for_connected_device = 1;
516ebfb1 2987 return user_area_size;
b8aa7b35 2988}
c8f69686
UB		 2989/* Decode the encoded EEPROM field for the FTDI Mode into a value for the abstracted
2990 * EEPROM structure
2991 *
2992 * FTD2XX doesn't allow to set multiple bits in the interface mode bitfield, and so do we
2993 */
2994static unsigned char bit2type(unsigned char bits)
0fc2170c
UB		 2995{
2996 switch (bits)
2997 {
c8f69686
UB		 2998 case 0: return CHANNEL_IS_UART;
2999 case 1: return CHANNEL_IS_FIFO;
3000 case 2: return CHANNEL_IS_OPTO;
3001 case 4: return CHANNEL_IS_CPU;
3002 case 8: return CHANNEL_IS_FT1284;
0fc2170c
UB		 3003 default:
3004 fprintf(stderr," Unexpected value %d for Hardware Interface type\n",
3005 bits);
3006 }
3007 return 0;
3008}
4af1d1bb
MK		 3009/**
3010 Decode binary EEPROM image into an ftdi_eeprom structure.
3011
a35aa9bd
UB		 3012 \param ftdi pointer to ftdi_context
3013 \param verbose Decode EEPROM on stdout
56ac0383 3014
4af1d1bb
MK		 3015 \retval 0: all fine
3016 \retval -1: something went wrong
3017
3018 FIXME: How to pass size? How to handle size field in ftdi_eeprom?
3019 FIXME: Strings are malloc'ed here and should be freed somewhere
3020*/
a35aa9bd 3021int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
b56d5a64
MK		 3022{
3023 unsigned char i, j;
3024 unsigned short checksum, eeprom_checksum, value;
3025 unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
f2cd9fd5 3026 int eeprom_size;
c0a96aed 3027 struct ftdi_eeprom *eeprom;
3bc0387e 3028 unsigned char *buf = NULL;
22a1b5c1 3029
c0a96aed 3030 if (ftdi == NULL)
cc9c9d58 3031 ftdi_error_return(-1,"No context");
c0a96aed 3032 if (ftdi->eeprom == NULL)
6cd4f922 3033 ftdi_error_return(-1,"No eeprom structure");
56ac0383 3034
c0a96aed 3035 eeprom = ftdi->eeprom;
a35aa9bd 3036 eeprom_size = eeprom->size;
3bc0387e 3037 buf = ftdi->eeprom->buf;
b56d5a64 3038
b56d5a64
MK		 3039 // Addr 02: Vendor ID
3040 eeprom->vendor_id = buf[0x02] + (buf[0x03] << 8);
3041
3042 // Addr 04: Product ID
3043 eeprom->product_id = buf[0x04] + (buf[0x05] << 8);
22d12cda 3044
68e78641
JS		 3045 // Addr 06: Device release number
3046 eeprom->release_number = buf[0x06] + (buf[0x07]<<8);
b56d5a64
MK		 3047
3048 // Addr 08: Config descriptor
3049 // Bit 7: always 1
3050 // Bit 6: 1 if this device is self powered, 0 if bus powered
3051 // Bit 5: 1 if this device uses remote wakeup
f6ef2983 3052 eeprom->self_powered = buf[0x08] & 0x40;
814710ba 3053 eeprom->remote_wakeup = buf[0x08] & 0x20;
b56d5a64
MK		 3054
3055 // Addr 09: Max power consumption: max power = value * 2 mA
a7c32c59 3056 eeprom->max_power = MAX_POWER_MILLIAMP_PER_UNIT * buf[0x09];
b56d5a64
MK		 3057
3058 // Addr 0A: Chip configuration
3059 // Bit 7: 0 - reserved
3060 // Bit 6: 0 - reserved
3061 // Bit 5: 0 - reserved
caec1294 3062 // Bit 4: 1 - Change USB version on BM and 2232C
b56d5a64
MK		 3063 // Bit 3: 1 - Use the serial number string
3064 // Bit 2: 1 - Enable suspend pull downs for lower power
3065 // Bit 1: 1 - Out EndPoint is Isochronous
3066 // Bit 0: 1 - In EndPoint is Isochronous
3067 //
8d3fe5c9
UB		 3068 eeprom->in_is_isochronous = buf[0x0A]&0x01;
3069 eeprom->out_is_isochronous = buf[0x0A]&0x02;
3070 eeprom->suspend_pull_downs = buf[0x0A]&0x04;
d4b5af27 3071 eeprom->use_serial = (buf[0x0A] & USE_SERIAL_NUM)?1:0;
caec1294 3072 eeprom->use_usb_version = buf[0x0A] & USE_USB_VERSION_BIT;
b56d5a64 3073
b1859923 3074 // Addr 0C: USB version low byte when 0x0A
56ac0383 3075 // Addr 0D: USB version high byte when 0x0A
b1859923 3076 eeprom->usb_version = buf[0x0C] + (buf[0x0D] << 8);
b56d5a64
MK		 3077
3078 // Addr 0E: Offset of the manufacturer string + 0x80, calculated later
3079 // Addr 0F: Length of manufacturer string
3080 manufacturer_size = buf[0x0F]/2;
56ac0383 3081 if (eeprom->manufacturer)
74e8e79d 3082 free(eeprom->manufacturer);
56ac0383 3083 if (manufacturer_size > 0)
acc1fa05
UB		 3084 {
3085 eeprom->manufacturer = malloc(manufacturer_size);
3086 if (eeprom->manufacturer)
3087 {
3088 // Decode manufacturer
84ec032f 3089 i = buf[0x0E] & (eeprom_size -1); // offset
acc1fa05
UB		 3090 for (j=0;j<manufacturer_size-1;j++)
3091 {
3092 eeprom->manufacturer[j] = buf[2*j+i+2];
3093 }
3094 eeprom->manufacturer[j] = '\0';
3095 }
3096 }
b56d5a64
MK		 3097 else eeprom->manufacturer = NULL;
3098
3099 // Addr 10: Offset of the product string + 0x80, calculated later
3100 // Addr 11: Length of product string
56ac0383 3101 if (eeprom->product)
74e8e79d 3102 free(eeprom->product);
b56d5a64 3103 product_size = buf[0x11]/2;
acc1fa05
UB		 3104 if (product_size > 0)
3105 {
3106 eeprom->product = malloc(product_size);
56ac0383 3107 if (eeprom->product)
acc1fa05
UB		 3108 {
3109 // Decode product name
84ec032f 3110 i = buf[0x10] & (eeprom_size -1); // offset
acc1fa05
UB		 3111 for (j=0;j<product_size-1;j++)
3112 {
3113 eeprom->product[j] = buf[2*j+i+2];
3114 }
3115 eeprom->product[j] = '\0';
3116 }
3117 }
b56d5a64
MK		 3118 else eeprom->product = NULL;
3119
3120 // Addr 12: Offset of the serial string + 0x80, calculated later
3121 // Addr 13: Length of serial string
56ac0383 3122 if (eeprom->serial)
74e8e79d 3123 free(eeprom->serial);
b56d5a64 3124 serial_size = buf[0x13]/2;
acc1fa05
UB		 3125 if (serial_size > 0)
3126 {
3127 eeprom->serial = malloc(serial_size);
56ac0383 3128 if (eeprom->serial)
acc1fa05
UB		 3129 {
3130 // Decode serial
84ec032f 3131 i = buf[0x12] & (eeprom_size -1); // offset
acc1fa05
UB		 3132 for (j=0;j<serial_size-1;j++)
3133 {
3134 eeprom->serial[j] = buf[2*j+i+2];
3135 }
3136 eeprom->serial[j] = '\0';
3137 }
3138 }
b56d5a64
MK		 3139 else eeprom->serial = NULL;
3140
b56d5a64
MK		 3141 // verify checksum
3142 checksum = 0xAAAA;
3143
22d12cda
TJ		 3144 for (i = 0; i < eeprom_size/2-1; i++)
3145 {
b56d5a64
MK		 3146 value = buf[i*2];
3147 value += buf[(i*2)+1] << 8;
3148
3149 checksum = value^checksum;
3150 checksum = (checksum << 1) | (checksum >> 15);
3151 }
3152
3153 eeprom_checksum = buf[eeprom_size-2] + (buf[eeprom_size-1] << 8);
3154
22d12cda
TJ		 3155 if (eeprom_checksum != checksum)
3156 {
3157 fprintf(stderr, "Checksum Error: %04x %04x\n", checksum, eeprom_checksum);
cc9c9d58 3158 ftdi_error_return(-1,"EEPROM checksum error");
4af1d1bb
MK		 3159 }
3160
eb498cff 3161 eeprom->channel_a_type = 0;
aa099f46 3162 if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM))
f6ef2983 3163 {
6cd4f922 3164 eeprom->chip = -1;
f6ef2983 3165 }
56ac0383 3166 else if (ftdi->type == TYPE_2232C)
f6ef2983 3167 {
0fc2170c 3168 eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
2cde7c52
UB		 3169 eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
3170 eeprom->high_current_a = buf[0x00] & HIGH_CURRENT_DRIVE;
3171 eeprom->channel_b_type = buf[0x01] & 0x7;
3172 eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3173 eeprom->high_current_b = buf[0x01] & HIGH_CURRENT_DRIVE;
6cd4f922 3174 eeprom->chip = buf[0x14];
065edc58 3175 }
56ac0383 3176 else if (ftdi->type == TYPE_R)
564b2716 3177 {
2cde7c52 3178 /* TYPE_R flags D2XX, not VCP as all others*/
be4bae37 3179 eeprom->channel_a_driver = ~buf[0x00] & DRIVER_VCP;
2cde7c52 3180 eeprom->high_current = buf[0x00] & HIGH_CURRENT_DRIVE_R;
56ac0383
TJ		 3181 if ( (buf[0x01]&0x40) != 0x40)
3182 fprintf(stderr,
3183 "TYPE_R EEPROM byte[0x01] Bit 6 unexpected Endpoint size."
3184 " If this happened with the\n"
3185 " EEPROM programmed by FTDI tools, please report "
3186 "to libftdi@developer.intra2net.com\n");
2cde7c52 3187
6cd4f922 3188 eeprom->chip = buf[0x16];
cecb9cb2
UB		 3189 // Addr 0B: Invert data lines
3190 // Works only on FT232R, not FT245R, but no way to distinguish
07851949
UB		 3191 eeprom->invert = buf[0x0B];
3192 // Addr 14: CBUS function: CBUS0, CBUS1
3193 // Addr 15: CBUS function: CBUS2, CBUS3
3194 // Addr 16: CBUS function: CBUS5
3195 eeprom->cbus_function[0] = buf[0x14] & 0x0f;
3196 eeprom->cbus_function[1] = (buf[0x14] >> 4) & 0x0f;
3197 eeprom->cbus_function[2] = buf[0x15] & 0x0f;
3198 eeprom->cbus_function[3] = (buf[0x15] >> 4) & 0x0f;
3199 eeprom->cbus_function[4] = buf[0x16] & 0x0f;
564b2716 3200 }
be4bae37 3201 else if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
db099ec5 3202 {
2cde7c52 3203 eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
2cde7c52
UB		 3204 eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
3205
56ac0383 3206 if (ftdi->type == TYPE_2232H)
be4bae37
AL		 3207 {
3208 eeprom->channel_a_type = bit2type(buf[0x00] & 0x7);
3209 eeprom->channel_b_type = bit2type(buf[0x01] & 0x7);
ec0dcd3f 3210 eeprom->suspend_dbus7 = buf[0x01] & SUSPEND_DBUS7_BIT;
be4bae37
AL		 3211 }
3212 else
3213 {
3214 eeprom->channel_c_driver = (buf[0x00] >> 4) & DRIVER_VCP;
3215 eeprom->channel_d_driver = (buf[0x01] >> 4) & DRIVER_VCP;
3216 eeprom->channel_a_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 0);
3217 eeprom->channel_b_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 1);
3218 eeprom->channel_c_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 2);
3219 eeprom->channel_d_rs485enable = buf[0x0b] & (CHANNEL_IS_RS485 << 3);
3220 }
2cde7c52 3221
6cd4f922 3222 eeprom->chip = buf[0x18];
db099ec5
UB		 3223 eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3224 eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3225 eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3226 eeprom->group1_drive = (buf[0x0c] >> 4) & 0x3;
3227 eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
3228 eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
3229 eeprom->group2_drive = buf[0x0d] & DRIVE_16MA;
3230 eeprom->group2_schmitt = buf[0x0d] & IS_SCHMITT;
3231 eeprom->group2_slew = buf[0x0d] & SLOW_SLEW;
3232 eeprom->group3_drive = (buf[0x0d] >> 4) & DRIVE_16MA;
3233 eeprom->group3_schmitt = (buf[0x0d] >> 4) & IS_SCHMITT;
3234 eeprom->group3_slew = (buf[0x0d] >> 4) & SLOW_SLEW;
947d9552 3235 }
c7e4c09e
UB		 3236 else if (ftdi->type == TYPE_232H)
3237 {
263d3ba0
UB		 3238 int i;
3239
ac4a82a5
UB		 3240 eeprom->channel_a_type = buf[0x00] & 0xf;
3241 eeprom->channel_a_driver = (buf[0x00] & DRIVER_VCPH)?DRIVER_VCP:0;
18199b76
UB		 3242 eeprom->clock_polarity = buf[0x01] & FT1284_CLK_IDLE_STATE;
3243 eeprom->data_order = buf[0x01] & FT1284_DATA_LSB;
3244 eeprom->flow_control = buf[0x01] & FT1284_FLOW_CONTROL;
837a71d6 3245 eeprom->powersave = buf[0x01] & POWER_SAVE_DISABLE_H;
91d7a201
UB		 3246 eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
3247 eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
3248 eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
3249 eeprom->group1_drive = buf[0x0d] & DRIVE_16MA;
3250 eeprom->group1_schmitt = buf[0x0d] & IS_SCHMITT;
3251 eeprom->group1_slew = buf[0x0d] & SLOW_SLEW;
3252
263d3ba0
UB		 3253 for(i=0; i<5; i++)
3254 {
3255 eeprom->cbus_function[2*i ] = buf[0x18+i] & 0x0f;
3256 eeprom->cbus_function[2*i+1] = (buf[0x18+i] >> 4) & 0x0f;
3257 }
c7e4c09e
UB		 3258 eeprom->chip = buf[0x1e];
3259 /*FIXME: Decipher more values*/
3260 }
56ac0383
TJ		 3261
3262 if (verbose)
f6ef2983 3263 {
c8f69686 3264 char *channel_mode[] = {"UART", "FIFO", "CPU", "OPTO", "FT1284"};
f6ef2983
UB		 3265 fprintf(stdout, "VID: 0x%04x\n",eeprom->vendor_id);
3266 fprintf(stdout, "PID: 0x%04x\n",eeprom->product_id);
68e78641 3267 fprintf(stdout, "Release: 0x%04x\n",eeprom->release_number);
f6ef2983 3268
56ac0383 3269 if (eeprom->self_powered)
f6ef2983
UB		 3270 fprintf(stdout, "Self-Powered%s", (eeprom->remote_wakeup)?", USB Remote Wake Up\n":"\n");
3271 else
a7c32c59 3272 fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power,
f6ef2983 3273 (eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
56ac0383 3274 if (eeprom->manufacturer)
f6ef2983 3275 fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
56ac0383 3276 if (eeprom->product)
f6ef2983 3277 fprintf(stdout, "Product: %s\n",eeprom->product);
56ac0383 3278 if (eeprom->serial)
f6ef2983 3279 fprintf(stdout, "Serial: %s\n",eeprom->serial);
e107f509 3280 fprintf(stdout, "Checksum : %04x\n", checksum);
6cd4f922
UB		 3281 if (ftdi->type == TYPE_R)
3282 fprintf(stdout, "Internal EEPROM\n");
3283 else if (eeprom->chip >= 0x46)
3284 fprintf(stdout, "Attached EEPROM: 93x%02x\n", eeprom->chip);
56ac0383
TJ		 3285 if (eeprom->suspend_dbus7)
3286 fprintf(stdout, "Suspend on DBUS7\n");
3287 if (eeprom->suspend_pull_downs)
fb9bfdd1 3288 fprintf(stdout, "Pull IO pins low during suspend\n");
837a71d6
UB		 3289 if(eeprom->powersave)
3290 {
3291 if(ftdi->type >= TYPE_232H)
3292 fprintf(stdout,"Enter low power state on ACBUS7\n");
3293 }
56ac0383 3294 if (eeprom->remote_wakeup)
fb9bfdd1 3295 fprintf(stdout, "Enable Remote Wake Up\n");
802a949e 3296 fprintf(stdout, "PNP: %d\n",(eeprom->is_not_pnp)?0:1);
db099ec5 3297 if (ftdi->type >= TYPE_2232C)
56ac0383 3298 fprintf(stdout,"Channel A has Mode %s%s%s\n",
e107f509 3299 channel_mode[eeprom->channel_a_type],
2cde7c52
UB		 3300 (eeprom->channel_a_driver)?" VCP":"",
3301 (eeprom->high_current_a)?" High Current IO":"");
18199b76
UB		 3302 if (ftdi->type >= TYPE_232H)
3303 {
3304 fprintf(stdout,"FT1284 Mode Clock is idle %s, %s first, %sFlow Control\n",
3305 (eeprom->clock_polarity)?"HIGH":"LOW",
3306 (eeprom->data_order)?"LSB":"MSB",
3307 (eeprom->flow_control)?"":"No ");
3308 }
c7e4c09e 3309 if ((ftdi->type >= TYPE_2232C) && (ftdi->type != TYPE_R) && (ftdi->type != TYPE_232H))
56ac0383 3310 fprintf(stdout,"Channel B has Mode %s%s%s\n",
e107f509 3311 channel_mode[eeprom->channel_b_type],
2cde7c52
UB		 3312 (eeprom->channel_b_driver)?" VCP":"",
3313 (eeprom->high_current_b)?" High Current IO":"");
caec1294 3314 if (((ftdi->type == TYPE_BM) || (ftdi->type == TYPE_2232C)) &&
56ac0383 3315 eeprom->use_usb_version == USE_USB_VERSION_BIT)
caec1294
UB		 3316 fprintf(stdout,"Use explicit USB Version %04x\n",eeprom->usb_version);
3317
56ac0383 3318 if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
db099ec5
UB		 3319 {
3320 fprintf(stdout,"%s has %d mA drive%s%s\n",
3321 (ftdi->type == TYPE_2232H)?"AL":"A",
3322 (eeprom->group0_drive+1) *4,
3323 (eeprom->group0_schmitt)?" Schmitt Input":"",
3324 (eeprom->group0_slew)?" Slow Slew":"");
3325 fprintf(stdout,"%s has %d mA drive%s%s\n",
3326 (ftdi->type == TYPE_2232H)?"AH":"B",
3327 (eeprom->group1_drive+1) *4,
3328 (eeprom->group1_schmitt)?" Schmitt Input":"",
3329 (eeprom->group1_slew)?" Slow Slew":"");
3330 fprintf(stdout,"%s has %d mA drive%s%s\n",
3331 (ftdi->type == TYPE_2232H)?"BL":"C",
3332 (eeprom->group2_drive+1) *4,
3333 (eeprom->group2_schmitt)?" Schmitt Input":"",
3334 (eeprom->group2_slew)?" Slow Slew":"");
3335 fprintf(stdout,"%s has %d mA drive%s%s\n",
3336 (ftdi->type == TYPE_2232H)?"BH":"D",
3337 (eeprom->group3_drive+1) *4,
3338 (eeprom->group3_schmitt)?" Schmitt Input":"",
3339 (eeprom->group3_slew)?" Slow Slew":"");
3340 }
91d7a201
UB		 3341 else if (ftdi->type == TYPE_232H)
3342 {
263d3ba0
UB		 3343 int i;
3344 char *cbush_mux[] = {"TRISTATE","RXLED","TXLED", "TXRXLED","PWREN",
3345 "SLEEP","DRIVE_0","DRIVE_1","IOMODE","TXDEN",
3346 "CLK30","CLK15","CLK7_5"
3347 };
91d7a201
UB		 3348 fprintf(stdout,"ACBUS has %d mA drive%s%s\n",
3349 (eeprom->group0_drive+1) *4,
3350 (eeprom->group0_schmitt)?" Schmitt Input":"",
3351 (eeprom->group0_slew)?" Slow Slew":"");
3352 fprintf(stdout,"ADBUS has %d mA drive%s%s\n",
3353 (eeprom->group1_drive+1) *4,
3354 (eeprom->group1_schmitt)?" Schmitt Input":"",
3355 (eeprom->group1_slew)?" Slow Slew":"");
263d3ba0
UB		 3356 for (i=0; i<10; i++)
3357 {
3358 if (eeprom->cbus_function[i]<= CBUSH_CLK7_5 )
3359 fprintf(stdout,"C%d Function: %s\n", i,
3360 cbush_mux[eeprom->cbus_function[i]]);
3361 }
91d7a201
UB		 3362 }
3363
a4980043
UB		 3364 if (ftdi->type == TYPE_R)
3365 {
3366 char *cbus_mux[] = {"TXDEN","PWREN","RXLED", "TXLED","TX+RXLED",
13f00d3c 3367 "SLEEP","CLK48","CLK24","CLK12","CLK6",
56ac0383
TJ		 3368 "IOMODE","BB_WR","BB_RD"
3369 };
13f00d3c 3370 char *cbus_BB[] = {"RXF","TXE","RD", "WR"};
56ac0383
TJ		 3371
3372 if (eeprom->invert)
3373 {
a4980043
UB		 3374 char *r_bits[] = {"TXD","RXD","RTS", "CTS","DTR","DSR","DCD","RI"};
3375 fprintf(stdout,"Inverted bits:");
3376 for (i=0; i<8; i++)
56ac0383 3377 if ((eeprom->invert & (1<<i)) == (1<<i))
a4980043
UB		 3378 fprintf(stdout," %s",r_bits[i]);
3379 fprintf(stdout,"\n");
3380 }
56ac0383 3381 for (i=0; i<5; i++)
a4980043 3382 {
56ac0383 3383 if (eeprom->cbus_function[i]<CBUS_BB)
a4980043
UB		 3384 fprintf(stdout,"C%d Function: %s\n", i,
3385 cbus_mux[eeprom->cbus_function[i]]);
3386 else
17431287 3387 {
598b2334
UB		 3388 if (i < 4)
3389 /* Running MPROG show that C0..3 have fixed function Synchronous
3390 Bit Bang mode */
3391 fprintf(stdout,"C%d BB Function: %s\n", i,
3392 cbus_BB[i]);
3393 else
3394 fprintf(stdout, "Unknown CBUS mode. Might be special mode?\n");
17431287 3395 }
a4980043
UB		 3396 }
3397 }
f6ef2983 3398 }
4af1d1bb 3399 return 0;
b56d5a64
MK		 3400}
3401
1941414d 3402/**
44ef02bd
UB		 3403 Get a value from the decoded EEPROM structure
3404
735e81ea
TJ		 3405 \param ftdi pointer to ftdi_context
3406 \param value_name Enum of the value to query
3407 \param value Pointer to store read value
44ef02bd 3408
735e81ea
TJ		 3409 \retval 0: all fine
3410 \retval -1: Value doesn't exist
44ef02bd
UB		 3411*/
3412int ftdi_get_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int* value)
3413{
3414 switch (value_name)
3415 {
56ac0383
TJ		 3416 case VENDOR_ID:
3417 *value = ftdi->eeprom->vendor_id;
3418 break;
3419 case PRODUCT_ID:
3420 *value = ftdi->eeprom->product_id;
3421 break;
68e78641
JS		 3422 case RELEASE_NUMBER:
3423 *value = ftdi->eeprom->release_number;
3424 break;
56ac0383
TJ		 3425 case SELF_POWERED:
3426 *value = ftdi->eeprom->self_powered;
3427 break;
3428 case REMOTE_WAKEUP:
3429 *value = ftdi->eeprom->remote_wakeup;
3430 break;
3431 case IS_NOT_PNP:
3432 *value = ftdi->eeprom->is_not_pnp;
3433 break;
3434 case SUSPEND_DBUS7:
3435 *value = ftdi->eeprom->suspend_dbus7;
3436 break;
3437 case IN_IS_ISOCHRONOUS:
3438 *value = ftdi->eeprom->in_is_isochronous;
3439 break;
cffed9f5
UB		 3440 case OUT_IS_ISOCHRONOUS:
3441 *value = ftdi->eeprom->out_is_isochronous;
3442 break;
56ac0383
TJ		 3443 case SUSPEND_PULL_DOWNS:
3444 *value = ftdi->eeprom->suspend_pull_downs;
3445 break;
3446 case USE_SERIAL:
3447 *value = ftdi->eeprom->use_serial;
3448 break;
3449 case USB_VERSION:
3450 *value = ftdi->eeprom->usb_version;
3451 break;
cffed9f5
UB		 3452 case USE_USB_VERSION:
3453 *value = ftdi->eeprom->use_usb_version;
3454 break;
56ac0383
TJ		 3455 case MAX_POWER:
3456 *value = ftdi->eeprom->max_power;
3457 break;
3458 case CHANNEL_A_TYPE:
3459 *value = ftdi->eeprom->channel_a_type;
3460 break;
3461 case CHANNEL_B_TYPE:
3462 *value = ftdi->eeprom->channel_b_type;
3463 break;
3464 case CHANNEL_A_DRIVER:
3465 *value = ftdi->eeprom->channel_a_driver;
3466 break;
3467 case CHANNEL_B_DRIVER:
3468 *value = ftdi->eeprom->channel_b_driver;
3469 break;
be4bae37
AL		 3470 case CHANNEL_C_DRIVER:
3471 *value = ftdi->eeprom->channel_c_driver;
3472 break;
3473 case CHANNEL_D_DRIVER:
3474 *value = ftdi->eeprom->channel_d_driver;
3475 break;
3476 case CHANNEL_A_RS485:
3477 *value = ftdi->eeprom->channel_a_rs485enable;
3478 break;
3479 case CHANNEL_B_RS485:
3480 *value = ftdi->eeprom->channel_b_rs485enable;
3481 break;
3482 case CHANNEL_C_RS485:
3483 *value = ftdi->eeprom->channel_c_rs485enable;
3484 break;
3485 case CHANNEL_D_RS485:
3486 *value = ftdi->eeprom->channel_d_rs485enable;
3487 break;
56ac0383
TJ		 3488 case CBUS_FUNCTION_0:
3489 *value = ftdi->eeprom->cbus_function[0];
3490 break;
3491 case CBUS_FUNCTION_1:
3492 *value = ftdi->eeprom->cbus_function[1];
3493 break;
3494 case CBUS_FUNCTION_2:
3495 *value = ftdi->eeprom->cbus_function[2];
3496 break;
3497 case CBUS_FUNCTION_3:
3498 *value = ftdi->eeprom->cbus_function[3];
3499 break;
3500 case CBUS_FUNCTION_4:
3501 *value = ftdi->eeprom->cbus_function[4];
3502 break;
263d3ba0
UB		 3503 case CBUS_FUNCTION_5:
3504 *value = ftdi->eeprom->cbus_function[5];
3505 break;
3506 case CBUS_FUNCTION_6:
3507 *value = ftdi->eeprom->cbus_function[6];
3508 break;
3509 case CBUS_FUNCTION_7:
3510 *value = ftdi->eeprom->cbus_function[7];
3511 break;
3512 case CBUS_FUNCTION_8:
3513 *value = ftdi->eeprom->cbus_function[8];
3514 break;
3515 case CBUS_FUNCTION_9:
3516 *value = ftdi->eeprom->cbus_function[8];
3517 break;
56ac0383
TJ		 3518 case HIGH_CURRENT:
3519 *value = ftdi->eeprom->high_current;
3520 break;
3521 case HIGH_CURRENT_A:
3522 *value = ftdi->eeprom->high_current_a;
3523 break;
3524 case HIGH_CURRENT_B:
3525 *value = ftdi->eeprom->high_current_b;
3526 break;
3527 case INVERT:
3528 *value = ftdi->eeprom->invert;
3529 break;
3530 case GROUP0_DRIVE:
3531 *value = ftdi->eeprom->group0_drive;
3532 break;
3533 case GROUP0_SCHMITT:
3534 *value = ftdi->eeprom->group0_schmitt;
3535 break;
3536 case GROUP0_SLEW:
3537 *value = ftdi->eeprom->group0_slew;
3538 break;
3539 case GROUP1_DRIVE:
3540 *value = ftdi->eeprom->group1_drive;
3541 break;
3542 case GROUP1_SCHMITT:
3543 *value = ftdi->eeprom->group1_schmitt;
3544 break;
3545 case GROUP1_SLEW:
3546 *value = ftdi->eeprom->group1_slew;
3547 break;
3548 case GROUP2_DRIVE:
3549 *value = ftdi->eeprom->group2_drive;
3550 break;
3551 case GROUP2_SCHMITT:
3552 *value = ftdi->eeprom->group2_schmitt;
3553 break;
3554 case GROUP2_SLEW:
3555 *value = ftdi->eeprom->group2_slew;
3556 break;
3557 case GROUP3_DRIVE:
3558 *value = ftdi->eeprom->group3_drive;
3559 break;
3560 case GROUP3_SCHMITT:
3561 *value = ftdi->eeprom->group3_schmitt;
3562 break;
3563 case GROUP3_SLEW:
3564 *value = ftdi->eeprom->group3_slew;
3565 break;
837a71d6
UB		 3566 case POWER_SAVE:
3567 *value = ftdi->eeprom->powersave;
3568 break;
18199b76
UB		 3569 case CLOCK_POLARITY:
3570 *value = ftdi->eeprom->clock_polarity;
3571 break;
3572 case DATA_ORDER:
3573 *value = ftdi->eeprom->data_order;
3574 break;
3575 case FLOW_CONTROL:
3576 *value = ftdi->eeprom->flow_control;
3577 break;
3578 case CHIP_TYPE:
56ac0383
TJ		 3579 *value = ftdi->eeprom->chip;
3580 break;
3581 case CHIP_SIZE:
3582 *value = ftdi->eeprom->size;
3583 break;
3584 default:
3585 ftdi_error_return(-1, "Request for unknown EEPROM value");
44ef02bd
UB		 3586 }
3587 return 0;
3588}
3589
3590/**
3591 Set a value in the decoded EEPROM Structure
3592 No parameter checking is performed
3593
735e81ea 3594 \param ftdi pointer to ftdi_context
545f9df9 3595 \param value_name Enum of the value to set
735e81ea 3596 \param value to set
44ef02bd 3597
735e81ea
TJ		 3598 \retval 0: all fine
3599 \retval -1: Value doesn't exist
3600 \retval -2: Value not user settable
44ef02bd
UB		 3601*/
3602int ftdi_set_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int value)
3603{
3604 switch (value_name)
3605 {
56ac0383
TJ		 3606 case VENDOR_ID:
3607 ftdi->eeprom->vendor_id = value;
3608 break;
3609 case PRODUCT_ID:
3610 ftdi->eeprom->product_id = value;
3611 break;
68e78641
JS		 3612 case RELEASE_NUMBER:
3613 ftdi->eeprom->release_number = value;
3614 break;
56ac0383
TJ		 3615 case SELF_POWERED:
3616 ftdi->eeprom->self_powered = value;
3617 break;
3618 case REMOTE_WAKEUP:
3619 ftdi->eeprom->remote_wakeup = value;
3620 break;
3621 case IS_NOT_PNP:
3622 ftdi->eeprom->is_not_pnp = value;
3623 break;
3624 case SUSPEND_DBUS7:
3625 ftdi->eeprom->suspend_dbus7 = value;
3626 break;
3627 case IN_IS_ISOCHRONOUS:
3628 ftdi->eeprom->in_is_isochronous = value;
3629 break;
cffed9f5
UB		 3630 case OUT_IS_ISOCHRONOUS:
3631 ftdi->eeprom->out_is_isochronous = value;
3632 break;
56ac0383
TJ		 3633 case SUSPEND_PULL_DOWNS:
3634 ftdi->eeprom->suspend_pull_downs = value;
3635 break;
3636 case USE_SERIAL:
3637 ftdi->eeprom->use_serial = value;
3638 break;
3639 case USB_VERSION:
3640 ftdi->eeprom->usb_version = value;
3641 break;
cffed9f5
UB		 3642 case USE_USB_VERSION:
3643 ftdi->eeprom->use_usb_version = value;
3644 break;
56ac0383
TJ		 3645 case MAX_POWER:
3646 ftdi->eeprom->max_power = value;
3647 break;
3648 case CHANNEL_A_TYPE:
3649 ftdi->eeprom->channel_a_type = value;
3650 break;
3651 case CHANNEL_B_TYPE:
3652 ftdi->eeprom->channel_b_type = value;
3653 break;
3654 case CHANNEL_A_DRIVER:
3655 ftdi->eeprom->channel_a_driver = value;
3656 break;
3657 case CHANNEL_B_DRIVER:
3658 ftdi->eeprom->channel_b_driver = value;
3659 break;
be4bae37
AL		 3660 case CHANNEL_C_DRIVER:
3661 ftdi->eeprom->channel_c_driver = value;
3662 break;
3663 case CHANNEL_D_DRIVER:
3664 ftdi->eeprom->channel_d_driver = value;
3665 break;
3666 case CHANNEL_A_RS485:
3667 ftdi->eeprom->channel_a_rs485enable = value;
3668 break;
3669 case CHANNEL_B_RS485:
3670 ftdi->eeprom->channel_b_rs485enable = value;
3671 break;
3672 case CHANNEL_C_RS485:
3673 ftdi->eeprom->channel_c_rs485enable = value;
3674 break;
3675 case CHANNEL_D_RS485:
3676 ftdi->eeprom->channel_d_rs485enable = value;
3677 break;
56ac0383
TJ		 3678 case CBUS_FUNCTION_0:
3679 ftdi->eeprom->cbus_function[0] = value;
3680 break;
3681 case CBUS_FUNCTION_1:
3682 ftdi->eeprom->cbus_function[1] = value;
3683 break;
3684 case CBUS_FUNCTION_2:
3685 ftdi->eeprom->cbus_function[2] = value;
3686 break;
3687 case CBUS_FUNCTION_3:
3688 ftdi->eeprom->cbus_function[3] = value;
3689 break;
3690 case CBUS_FUNCTION_4:
3691 ftdi->eeprom->cbus_function[4] = value;
3692 break;
263d3ba0
UB		 3693 case CBUS_FUNCTION_5:
3694 ftdi->eeprom->cbus_function[5] = value;
3695 break;
3696 case CBUS_FUNCTION_6:
3697 ftdi->eeprom->cbus_function[6] = value;
3698 break;
3699 case CBUS_FUNCTION_7:
3700 ftdi->eeprom->cbus_function[7] = value;
3701 break;
3702 case CBUS_FUNCTION_8:
3703 ftdi->eeprom->cbus_function[8] = value;
3704 break;
3705 case CBUS_FUNCTION_9:
3706 ftdi->eeprom->cbus_function[9] = value;
3707 break;
56ac0383
TJ		 3708 case HIGH_CURRENT:
3709 ftdi->eeprom->high_current = value;
3710 break;
3711 case HIGH_CURRENT_A:
3712 ftdi->eeprom->high_current_a = value;
3713 break;
3714 case HIGH_CURRENT_B:
3715 ftdi->eeprom->high_current_b = value;
3716 break;
3717 case INVERT:
3718 ftdi->eeprom->invert = value;
3719 break;
3720 case GROUP0_DRIVE:
3721 ftdi->eeprom->group0_drive = value;
3722 break;
3723 case GROUP0_SCHMITT:
3724 ftdi->eeprom->group0_schmitt = value;
3725 break;
3726 case GROUP0_SLEW:
3727 ftdi->eeprom->group0_slew = value;
3728 break;
3729 case GROUP1_DRIVE:
3730 ftdi->eeprom->group1_drive = value;
3731 break;
3732 case GROUP1_SCHMITT:
3733 ftdi->eeprom->group1_schmitt = value;
3734 break;
3735 case GROUP1_SLEW:
3736 ftdi->eeprom->group1_slew = value;
3737 break;
3738 case GROUP2_DRIVE:
3739 ftdi->eeprom->group2_drive = value;
3740 break;
3741 case GROUP2_SCHMITT:
3742 ftdi->eeprom->group2_schmitt = value;
3743 break;
3744 case GROUP2_SLEW:
3745 ftdi->eeprom->group2_slew = value;
3746 break;
3747 case GROUP3_DRIVE:
3748 ftdi->eeprom->group3_drive = value;
3749 break;
3750 case GROUP3_SCHMITT:
3751 ftdi->eeprom->group3_schmitt = value;
3752 break;
3753 case GROUP3_SLEW:
3754 ftdi->eeprom->group3_slew = value;
3755 break;
3756 case CHIP_TYPE:
3757 ftdi->eeprom->chip = value;
3758 break;
837a71d6
UB		 3759 case POWER_SAVE:
3760 ftdi->eeprom->powersave = value;
3761 break;
18199b76
UB		 3762 case CLOCK_POLARITY:
3763 ftdi->eeprom->clock_polarity = value;
3764 break;
3765 case DATA_ORDER:
3766 ftdi->eeprom->data_order = value;
3767 break;
3768 case FLOW_CONTROL:
3769 ftdi->eeprom->flow_control = value;
3770 break;
56ac0383
TJ		 3771 case CHIP_SIZE:
3772 ftdi_error_return(-2, "EEPROM Value can't be changed");
3773 default :
3774 ftdi_error_return(-1, "Request to unknown EEPROM value");
44ef02bd 3775 }
45a3ebd5 3776 ftdi->eeprom->initialized_for_connected_device = 0;
44ef02bd
UB		 3777 return 0;
3778}
3779
3780/** Get the read-only buffer to the binary EEPROM content
3781
3782 \param ftdi pointer to ftdi_context
735e81ea 3783 \param buf buffer to receive EEPROM content
44ef02bd
UB		 3784 \param size Size of receiving buffer
3785
3786 \retval 0: All fine
3787 \retval -1: struct ftdi_contxt or ftdi_eeprom missing
200bd3ed 3788 \retval -2: Not enough room to store eeprom
44ef02bd 3789*/
56ac0383
TJ		 3790int ftdi_get_eeprom_buf(struct ftdi_context *ftdi, unsigned char * buf, int size)
3791{
3792 if (!ftdi || !(ftdi->eeprom))
3793 ftdi_error_return(-1, "No appropriate structure");
b95e4654 3794
200bd3ed
TJ		 3795 if (!buf || size < ftdi->eeprom->size)
3796 ftdi_error_return(-1, "Not enough room to store eeprom");
3797
b95e4654
TJ		 3798 // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
3799 if (size > FTDI_MAX_EEPROM_SIZE)
3800 size = FTDI_MAX_EEPROM_SIZE;
3801
56ac0383 3802 memcpy(buf, ftdi->eeprom->buf, size);
b95e4654 3803
56ac0383
TJ		 3804 return 0;
3805}
44ef02bd 3806
672fd368
UB		 3807/** Set the EEPROM content from the user-supplied prefilled buffer
3808
3809 \param ftdi pointer to ftdi_context
3810 \param buf buffer to read EEPROM content
3811 \param size Size of buffer
3812
3813 \retval 0: All fine
3814 \retval -1: struct ftdi_contxt or ftdi_eeprom of buf missing
3815*/
3816int ftdi_set_eeprom_buf(struct ftdi_context *ftdi, const unsigned char * buf, int size)
3817{
3818 if (!ftdi || !(ftdi->eeprom) || !buf)
3819 ftdi_error_return(-1, "No appropriate structure");
3820
3821 // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
3822 if (size > FTDI_MAX_EEPROM_SIZE)
3823 size = FTDI_MAX_EEPROM_SIZE;
3824
3825 memcpy(ftdi->eeprom->buf, buf, size);
3826
3827 return 0;
3828}
3829
44ef02bd 3830/**
c1c70e13
OS		 3831 Read eeprom location
3832
3833 \param ftdi pointer to ftdi_context
3834 \param eeprom_addr Address of eeprom location to be read
3835 \param eeprom_val Pointer to store read eeprom location
3836
3837 \retval 0: all fine
3838 \retval -1: read failed
22a1b5c1 3839 \retval -2: USB device unavailable
c1c70e13
OS		 3840*/
3841int ftdi_read_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short *eeprom_val)
3842{
22a1b5c1
TJ		 3843 if (ftdi == NULL || ftdi->usb_dev == NULL)
3844 ftdi_error_return(-2, "USB device unavailable");
3845
97c6b5f6 3846 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)
c1c70e13
OS		 3847 ftdi_error_return(-1, "reading eeprom failed");
3848
3849 return 0;
3850}
3851
3852/**
1941414d
TJ		 3853 Read eeprom
3854
3855 \param ftdi pointer to ftdi_context
b8aa7b35 3856
1941414d
TJ		 3857 \retval 0: all fine
3858 \retval -1: read failed
22a1b5c1 3859 \retval -2: USB device unavailable
1941414d 3860*/
a35aa9bd 3861int ftdi_read_eeprom(struct ftdi_context *ftdi)
a8f46ddc 3862{
a3da1d95 3863 int i;
a35aa9bd 3864 unsigned char *buf;
a3da1d95 3865
22a1b5c1
TJ		 3866 if (ftdi == NULL || ftdi->usb_dev == NULL)
3867 ftdi_error_return(-2, "USB device unavailable");
a35aa9bd 3868 buf = ftdi->eeprom->buf;
22a1b5c1 3869
2d543486 3870 for (i = 0; i < FTDI_MAX_EEPROM_SIZE/2; i++)
22d12cda 3871 {
a35aa9bd 3872 if (libusb_control_transfer(
56ac0383
TJ		 3873 ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE,SIO_READ_EEPROM_REQUEST, 0, i,
3874 buf+(i*2), 2, ftdi->usb_read_timeout) != 2)
c3d95b87 3875 ftdi_error_return(-1, "reading eeprom failed");
a3da1d95
GE		 3876 }
3877
2d543486 3878 if (ftdi->type == TYPE_R)
a35aa9bd 3879 ftdi->eeprom->size = 0x80;
56ac0383 3880 /* Guesses size of eeprom by comparing halves
2d543486 3881 - will not work with blank eeprom */
a35aa9bd 3882 else if (strrchr((const char *)buf, 0xff) == ((const char *)buf +FTDI_MAX_EEPROM_SIZE -1))
2d543486 3883 ftdi->eeprom->size = -1;
56ac0383 3884 else if (memcmp(buf,&buf[0x80],0x80) == 0)
2d543486 3885 ftdi->eeprom->size = 0x80;
56ac0383 3886 else if (memcmp(buf,&buf[0x40],0x40) == 0)
2d543486
UB		 3887 ftdi->eeprom->size = 0x40;
3888 else
3889 ftdi->eeprom->size = 0x100;
a3da1d95
GE		 3890 return 0;
3891}
3892
cb6250fa
TJ		 3893/*
3894 ftdi_read_chipid_shift does the bitshift operation needed for the FTDIChip-ID
3895 Function is only used internally
3896 \internal
3897*/
3898static unsigned char ftdi_read_chipid_shift(unsigned char value)
3899{
3900 return ((value & 1) << 1) |
22d12cda
TJ		 3901 ((value & 2) << 5) |
3902 ((value & 4) >> 2) |
3903 ((value & 8) << 4) |
3904 ((value & 16) >> 1) |
3905 ((value & 32) >> 1) |
3906 ((value & 64) >> 4) |
3907 ((value & 128) >> 2);
cb6250fa
TJ		 3908}
3909
3910/**
3911 Read the FTDIChip-ID from R-type devices
3912
3913 \param ftdi pointer to ftdi_context
3914 \param chipid Pointer to store FTDIChip-ID
3915
3916 \retval 0: all fine
3917 \retval -1: read failed
22a1b5c1 3918 \retval -2: USB device unavailable
cb6250fa
TJ		 3919*/
3920int ftdi_read_chipid(struct ftdi_context *ftdi, unsigned int *chipid)
3921{
c7eb3112 3922 unsigned int a = 0, b = 0;
cb6250fa 3923
22a1b5c1
TJ		 3924 if (ftdi == NULL || ftdi->usb_dev == NULL)
3925 ftdi_error_return(-2, "USB device unavailable");
3926
579b006f 3927 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)
cb6250fa
TJ		 3928 {
3929 a = a << 8 | a >> 8;
579b006f 3930 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)
cb6250fa
TJ		 3931 {
3932 b = b << 8 | b >> 8;
5230676f 3933 a = (a << 16) | (b & 0xFFFF);
912d50ca
TJ		 3934 a = ftdi_read_chipid_shift(a) | ftdi_read_chipid_shift(a>>8)<<8
3935 | ftdi_read_chipid_shift(a>>16)<<16 | ftdi_read_chipid_shift(a>>24)<<24;
cb6250fa 3936 *chipid = a ^ 0xa5f0f7d1;
c7eb3112 3937 return 0;
cb6250fa
TJ		 3938 }
3939 }
3940
c7eb3112 3941 ftdi_error_return(-1, "read of FTDIChip-ID failed");
cb6250fa
TJ		 3942}
3943
1941414d 3944/**
c1c70e13
OS		 3945 Write eeprom location
3946
3947 \param ftdi pointer to ftdi_context
3948 \param eeprom_addr Address of eeprom location to be written
3949 \param eeprom_val Value to be written
3950
3951 \retval 0: all fine
a661e3e4 3952 \retval -1: write failed
22a1b5c1 3953 \retval -2: USB device unavailable
a661e3e4
UB		 3954 \retval -3: Invalid access to checksum protected area below 0x80
3955 \retval -4: Device can't access unprotected area
3956 \retval -5: Reading chip type failed
c1c70e13 3957*/
56ac0383 3958int ftdi_write_eeprom_location(struct ftdi_context *ftdi, int eeprom_addr,
a661e3e4 3959 unsigned short eeprom_val)
c1c70e13 3960{
a661e3e4
UB		 3961 int chip_type_location;
3962 unsigned short chip_type;
3963
22a1b5c1
TJ		 3964 if (ftdi == NULL || ftdi->usb_dev == NULL)
3965 ftdi_error_return(-2, "USB device unavailable");
3966
56ac0383 3967 if (eeprom_addr <0x80)
a661e3e4
UB		 3968 ftdi_error_return(-2, "Invalid access to checksum protected area below 0x80");
3969
3970
3971 switch (ftdi->type)
3972 {
56ac0383
TJ		 3973 case TYPE_BM:
3974 case TYPE_2232C:
3975 chip_type_location = 0x14;
3976 break;
3977 case TYPE_2232H:
3978 case TYPE_4232H:
3979 chip_type_location = 0x18;
3980 break;
c7e4c09e
UB		 3981 case TYPE_232H:
3982 chip_type_location = 0x1e;
3983 break;
56ac0383
TJ		 3984 default:
3985 ftdi_error_return(-4, "Device can't access unprotected area");
a661e3e4
UB		 3986 }
3987
56ac0383 3988 if (ftdi_read_eeprom_location( ftdi, chip_type_location>>1, &chip_type))
a661e3e4 3989 ftdi_error_return(-5, "Reading failed failed");
56ac0383
TJ		 3990 fprintf(stderr," loc 0x%04x val 0x%04x\n", chip_type_location,chip_type);
3991 if ((chip_type & 0xff) != 0x66)
a661e3e4
UB		 3992 {
3993 ftdi_error_return(-6, "EEPROM is not of 93x66");
3994 }
3995
579b006f 3996 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
56ac0383
TJ		 3997 SIO_WRITE_EEPROM_REQUEST, eeprom_val, eeprom_addr,
3998 NULL, 0, ftdi->usb_write_timeout) != 0)
c1c70e13
OS		 3999 ftdi_error_return(-1, "unable to write eeprom");
4000
4001 return 0;
4002}
4003
4004/**
1941414d 4005 Write eeprom
a3da1d95 4006
1941414d 4007 \param ftdi pointer to ftdi_context
56ac0383 4008
1941414d
TJ		 4009 \retval 0: all fine
4010 \retval -1: read failed
22a1b5c1 4011 \retval -2: USB device unavailable
44f41f11 4012 \retval -3: EEPROM not initialized for the connected device;
1941414d 4013*/
a35aa9bd 4014int ftdi_write_eeprom(struct ftdi_context *ftdi)
a8f46ddc 4015{
ba5329be 4016 unsigned short usb_val, status;
e30da501 4017 int i, ret;
a35aa9bd 4018 unsigned char *eeprom;
a3da1d95 4019
22a1b5c1
TJ		 4020 if (ftdi == NULL || ftdi->usb_dev == NULL)
4021 ftdi_error_return(-2, "USB device unavailable");
44f41f11
UB		 4022
4023 if(ftdi->eeprom->initialized_for_connected_device == 0)
4024 ftdi_error_return(-3, "EEPROM not initialized for the connected device");
4025
a35aa9bd 4026 eeprom = ftdi->eeprom->buf;
22a1b5c1 4027
ba5329be 4028 /* These commands were traced while running MProg */
e30da501
TJ		 4029 if ((ret = ftdi_usb_reset(ftdi)) != 0)
4030 return ret;
4031 if ((ret = ftdi_poll_modem_status(ftdi, &status)) != 0)
4032 return ret;
4033 if ((ret = ftdi_set_latency_timer(ftdi, 0x77)) != 0)
4034 return ret;
ba5329be 4035
c0a96aed 4036 for (i = 0; i < ftdi->eeprom->size/2; i++)
22d12cda 4037 {
d9f0cce7
TJ		 4038 usb_val = eeprom[i*2];
4039 usb_val += eeprom[(i*2)+1] << 8;
579b006f
JZ		 4040 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
4041 SIO_WRITE_EEPROM_REQUEST, usb_val, i,
4042 NULL, 0, ftdi->usb_write_timeout) < 0)
c3d95b87 4043 ftdi_error_return(-1, "unable to write eeprom");
a3da1d95
GE		 4044 }
4045
4046 return 0;
4047}
4048
1941414d
TJ		 4049/**
4050 Erase eeprom
a3da1d95 4051
a5e1bd8c
MK		 4052 This is not supported on FT232R/FT245R according to the MProg manual from FTDI.
4053
1941414d
TJ		 4054 \param ftdi pointer to ftdi_context
4055
4056 \retval 0: all fine
4057 \retval -1: erase failed
22a1b5c1 4058 \retval -2: USB device unavailable
99404ad5
UB		 4059 \retval -3: Writing magic failed
4060 \retval -4: Read EEPROM failed
4061 \retval -5: Unexpected EEPROM value
1941414d 4062*/
99404ad5 4063#define MAGIC 0x55aa
a8f46ddc
TJ		 4064int ftdi_erase_eeprom(struct ftdi_context *ftdi)
4065{
99404ad5 4066 unsigned short eeprom_value;
22a1b5c1
TJ		 4067 if (ftdi == NULL || ftdi->usb_dev == NULL)
4068 ftdi_error_return(-2, "USB device unavailable");
4069
56ac0383 4070 if (ftdi->type == TYPE_R)
99404ad5
UB		 4071 {
4072 ftdi->eeprom->chip = 0;
4073 return 0;
4074 }
4075
56ac0383 4076 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
99404ad5 4077 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
c3d95b87 4078 ftdi_error_return(-1, "unable to erase eeprom");
a3da1d95 4079
56ac0383 4080
99404ad5
UB		 4081 /* detect chip type by writing 0x55AA as magic at word position 0xc0
4082 Chip is 93x46 if magic is read at word position 0x00, as wraparound happens around 0x40
4083 Chip is 93x56 if magic is read at word position 0x40, as wraparound happens around 0x80
4084 Chip is 93x66 if magic is only read at word position 0xc0*/
10186c1f 4085 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
56ac0383
TJ		 4086 SIO_WRITE_EEPROM_REQUEST, MAGIC, 0xc0,
4087 NULL, 0, ftdi->usb_write_timeout) != 0)
99404ad5 4088 ftdi_error_return(-3, "Writing magic failed");
56ac0383 4089 if (ftdi_read_eeprom_location( ftdi, 0x00, &eeprom_value))
99404ad5 4090 ftdi_error_return(-4, "Reading failed failed");
56ac0383 4091 if (eeprom_value == MAGIC)
99404ad5
UB		 4092 {
4093 ftdi->eeprom->chip = 0x46;
4094 }
56ac0383 4095 else
99404ad5 4096 {
56ac0383 4097 if (ftdi_read_eeprom_location( ftdi, 0x40, &eeprom_value))
99404ad5 4098 ftdi_error_return(-4, "Reading failed failed");
56ac0383 4099 if (eeprom_value == MAGIC)
99404ad5 4100 ftdi->eeprom->chip = 0x56;
56ac0383 4101 else
99404ad5 4102 {
56ac0383 4103 if (ftdi_read_eeprom_location( ftdi, 0xc0, &eeprom_value))
99404ad5 4104 ftdi_error_return(-4, "Reading failed failed");
56ac0383 4105 if (eeprom_value == MAGIC)
99404ad5
UB		 4106 ftdi->eeprom->chip = 0x66;
4107 else
4108 {
4109 ftdi->eeprom->chip = -1;
4110 }
4111 }
4112 }
56ac0383 4113 if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
99404ad5
UB		 4114 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
4115 ftdi_error_return(-1, "unable to erase eeprom");
a3da1d95
GE		 4116 return 0;
4117}
c3d95b87 4118
1941414d
TJ		 4119/**
4120 Get string representation for last error code
c3d95b87 4121
1941414d
TJ		 4122 \param ftdi pointer to ftdi_context
4123
4124 \retval Pointer to error string
4125*/
c3d95b87
TJ		 4126char *ftdi_get_error_string (struct ftdi_context *ftdi)
4127{
22a1b5c1
TJ		 4128 if (ftdi == NULL)
4129 return "";
4130
c3d95b87
TJ		 4131 return ftdi->error_str;
4132}
a01d31e2 4133
b5ec1820 4134/* @} end of doxygen libftdi group */
A library to talk to FTDI chips